diff options
Diffstat (limited to 'fs/btrfs')
45 files changed, 4615 insertions, 2360 deletions
diff --git a/fs/btrfs/async-thread.c b/fs/btrfs/async-thread.c index 0cc20b3..4270414 100644 --- a/fs/btrfs/async-thread.c +++ b/fs/btrfs/async-thread.c @@ -171,11 +171,11 @@ out: spin_unlock_irqrestore(&workers->lock, flags); } -static noinline int run_ordered_completions(struct btrfs_workers *workers, +static noinline void run_ordered_completions(struct btrfs_workers *workers, struct btrfs_work *work) { if (!workers->ordered) - return 0; + return; set_bit(WORK_DONE_BIT, &work->flags); @@ -213,7 +213,6 @@ static noinline int run_ordered_completions(struct btrfs_workers *workers, } spin_unlock(&workers->order_lock); - return 0; } static void put_worker(struct btrfs_worker_thread *worker) @@ -399,7 +398,7 @@ again: /* * this will wait for all the worker threads to shutdown */ -int btrfs_stop_workers(struct btrfs_workers *workers) +void btrfs_stop_workers(struct btrfs_workers *workers) { struct list_head *cur; struct btrfs_worker_thread *worker; @@ -427,7 +426,6 @@ int btrfs_stop_workers(struct btrfs_workers *workers) put_worker(worker); } spin_unlock_irq(&workers->lock); - return 0; } /* @@ -615,14 +613,14 @@ found: * it was taken from. It is intended for use with long running work functions * that make some progress and want to give the cpu up for others. */ -int btrfs_requeue_work(struct btrfs_work *work) +void btrfs_requeue_work(struct btrfs_work *work) { struct btrfs_worker_thread *worker = work->worker; unsigned long flags; int wake = 0; if (test_and_set_bit(WORK_QUEUED_BIT, &work->flags)) - goto out; + return; spin_lock_irqsave(&worker->lock, flags); if (test_bit(WORK_HIGH_PRIO_BIT, &work->flags)) @@ -649,9 +647,6 @@ int btrfs_requeue_work(struct btrfs_work *work) if (wake) wake_up_process(worker->task); spin_unlock_irqrestore(&worker->lock, flags); -out: - - return 0; } void btrfs_set_work_high_prio(struct btrfs_work *work) diff --git a/fs/btrfs/async-thread.h b/fs/btrfs/async-thread.h index f34cc31..063698b 100644 --- a/fs/btrfs/async-thread.h +++ b/fs/btrfs/async-thread.h @@ -111,9 +111,9 @@ struct btrfs_workers { void btrfs_queue_worker(struct btrfs_workers *workers, struct btrfs_work *work); int btrfs_start_workers(struct btrfs_workers *workers); -int btrfs_stop_workers(struct btrfs_workers *workers); +void btrfs_stop_workers(struct btrfs_workers *workers); void btrfs_init_workers(struct btrfs_workers *workers, char *name, int max, struct btrfs_workers *async_starter); -int btrfs_requeue_work(struct btrfs_work *work); +void btrfs_requeue_work(struct btrfs_work *work); void btrfs_set_work_high_prio(struct btrfs_work *work); #endif diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c index 633c701..f4e9074 100644 --- a/fs/btrfs/backref.c +++ b/fs/btrfs/backref.c @@ -116,6 +116,7 @@ add_parent: * to a logical address */ static int __resolve_indirect_ref(struct btrfs_fs_info *fs_info, + int search_commit_root, struct __prelim_ref *ref, struct ulist *parents) { @@ -131,6 +132,7 @@ static int __resolve_indirect_ref(struct btrfs_fs_info *fs_info, path = btrfs_alloc_path(); if (!path) return -ENOMEM; + path->search_commit_root = !!search_commit_root; root_key.objectid = ref->root_id; root_key.type = BTRFS_ROOT_ITEM_KEY; @@ -188,6 +190,7 @@ out: * resolve all indirect backrefs from the list */ static int __resolve_indirect_refs(struct btrfs_fs_info *fs_info, + int search_commit_root, struct list_head *head) { int err; @@ -212,7 +215,8 @@ static int __resolve_indirect_refs(struct btrfs_fs_info *fs_info, continue; if (ref->count == 0) continue; - err = __resolve_indirect_ref(fs_info, ref, parents); + err = __resolve_indirect_ref(fs_info, search_commit_root, + ref, parents); if (err) { if (ret == 0) ret = err; @@ -583,9 +587,10 @@ static int find_parent_nodes(struct btrfs_trans_handle *trans, struct btrfs_path *path; struct btrfs_key info_key = { 0 }; struct btrfs_delayed_ref_root *delayed_refs = NULL; - struct btrfs_delayed_ref_head *head = NULL; + struct btrfs_delayed_ref_head *head; int info_level = 0; int ret; + int search_commit_root = (trans == BTRFS_BACKREF_SEARCH_COMMIT_ROOT); struct list_head prefs_delayed; struct list_head prefs; struct __prelim_ref *ref; @@ -600,6 +605,7 @@ static int find_parent_nodes(struct btrfs_trans_handle *trans, path = btrfs_alloc_path(); if (!path) return -ENOMEM; + path->search_commit_root = !!search_commit_root; /* * grab both a lock on the path and a lock on the delayed ref head. @@ -607,38 +613,46 @@ static int find_parent_nodes(struct btrfs_trans_handle *trans, * at a specified point in time */ again: + head = NULL; + ret = btrfs_search_slot(trans, fs_info->extent_root, &key, path, 0, 0); if (ret < 0) goto out; BUG_ON(ret == 0); - /* - * look if there are updates for this ref queued and lock the head - */ - delayed_refs = &trans->transaction->delayed_refs; - spin_lock(&delayed_refs->lock); - head = btrfs_find_delayed_ref_head(trans, bytenr); - if (head) { - if (!mutex_trylock(&head->mutex)) { - atomic_inc(&head->node.refs); - spin_unlock(&delayed_refs->lock); - - btrfs_release_path(path); - - /* - * Mutex was contended, block until it's - * released and try again - */ - mutex_lock(&head->mutex); - mutex_unlock(&head->mutex); - btrfs_put_delayed_ref(&head->node); - goto again; + if (trans != BTRFS_BACKREF_SEARCH_COMMIT_ROOT) { + /* + * look if there are updates for this ref queued and lock the + * head + */ + delayed_refs = &trans->transaction->delayed_refs; + spin_lock(&delayed_refs->lock); + head = btrfs_find_delayed_ref_head(trans, bytenr); + if (head) { + if (!mutex_trylock(&head->mutex)) { + atomic_inc(&head->node.refs); + spin_unlock(&delayed_refs->lock); + + btrfs_release_path(path); + + /* + * Mutex was contended, block until it's + * released and try again + */ + mutex_lock(&head->mutex); + mutex_unlock(&head->mutex); + btrfs_put_delayed_ref(&head->node); + goto again; + } + ret = __add_delayed_refs(head, seq, &info_key, + &prefs_delayed); + if (ret) { + spin_unlock(&delayed_refs->lock); + goto out; + } } - ret = __add_delayed_refs(head, seq, &info_key, &prefs_delayed); - if (ret) - goto out; + spin_unlock(&delayed_refs->lock); } - spin_unlock(&delayed_refs->lock); if (path->slots[0]) { struct extent_buffer *leaf; @@ -675,7 +689,7 @@ again: if (ret) goto out; - ret = __resolve_indirect_refs(fs_info, &prefs); + ret = __resolve_indirect_refs(fs_info, search_commit_root, &prefs); if (ret) goto out; @@ -892,6 +906,8 @@ static char *iref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path, if (eb != eb_in) free_extent_buffer(eb); ret = inode_ref_info(parent, 0, fs_root, path, &found_key); + if (ret > 0) + ret = -ENOENT; if (ret) break; next_inum = found_key.offset; @@ -1068,8 +1084,7 @@ int tree_backref_for_extent(unsigned long *ptr, struct extent_buffer *eb, return 0; } -static int iterate_leaf_refs(struct btrfs_fs_info *fs_info, - struct btrfs_path *path, u64 logical, +static int iterate_leaf_refs(struct btrfs_fs_info *fs_info, u64 logical, u64 orig_extent_item_objectid, u64 extent_item_pos, u64 root, iterate_extent_inodes_t *iterate, void *ctx) @@ -1137,35 +1152,38 @@ static int iterate_leaf_refs(struct btrfs_fs_info *fs_info, * calls iterate() for every inode that references the extent identified by * the given parameters. * when the iterator function returns a non-zero value, iteration stops. - * path is guaranteed to be in released state when iterate() is called. */ int iterate_extent_inodes(struct btrfs_fs_info *fs_info, - struct btrfs_path *path, u64 extent_item_objectid, u64 extent_item_pos, + int search_commit_root, iterate_extent_inodes_t *iterate, void *ctx) { int ret; struct list_head data_refs = LIST_HEAD_INIT(data_refs); struct list_head shared_refs = LIST_HEAD_INIT(shared_refs); struct btrfs_trans_handle *trans; - struct ulist *refs; - struct ulist *roots; + struct ulist *refs = NULL; + struct ulist *roots = NULL; struct ulist_node *ref_node = NULL; struct ulist_node *root_node = NULL; struct seq_list seq_elem; - struct btrfs_delayed_ref_root *delayed_refs; - - trans = btrfs_join_transaction(fs_info->extent_root); - if (IS_ERR(trans)) - return PTR_ERR(trans); + struct btrfs_delayed_ref_root *delayed_refs = NULL; pr_debug("resolving all inodes for extent %llu\n", extent_item_objectid); - delayed_refs = &trans->transaction->delayed_refs; - spin_lock(&delayed_refs->lock); - btrfs_get_delayed_seq(delayed_refs, &seq_elem); - spin_unlock(&delayed_refs->lock); + if (search_commit_root) { + trans = BTRFS_BACKREF_SEARCH_COMMIT_ROOT; + } else { + trans = btrfs_join_transaction(fs_info->extent_root); + if (IS_ERR(trans)) + return PTR_ERR(trans); + + delayed_refs = &trans->transaction->delayed_refs; + spin_lock(&delayed_refs->lock); + btrfs_get_delayed_seq(delayed_refs, &seq_elem); + spin_unlock(&delayed_refs->lock); + } ret = btrfs_find_all_leafs(trans, fs_info, extent_item_objectid, extent_item_pos, seq_elem.seq, @@ -1182,7 +1200,7 @@ int iterate_extent_inodes(struct btrfs_fs_info *fs_info, while (!ret && (root_node = ulist_next(roots, root_node))) { pr_debug("root %llu references leaf %llu\n", root_node->val, ref_node->val); - ret = iterate_leaf_refs(fs_info, path, ref_node->val, + ret = iterate_leaf_refs(fs_info, ref_node->val, extent_item_objectid, extent_item_pos, root_node->val, iterate, ctx); @@ -1192,8 +1210,11 @@ int iterate_extent_inodes(struct btrfs_fs_info *fs_info, ulist_free(refs); ulist_free(roots); out: - btrfs_put_delayed_seq(delayed_refs, &seq_elem); - btrfs_end_transaction(trans, fs_info->extent_root); + if (!search_commit_root) { + btrfs_put_delayed_seq(delayed_refs, &seq_elem); + btrfs_end_transaction(trans, fs_info->extent_root); + } + return ret; } @@ -1204,6 +1225,7 @@ int iterate_inodes_from_logical(u64 logical, struct btrfs_fs_info *fs_info, int ret; u64 extent_item_pos; struct btrfs_key found_key; + int search_commit_root = path->search_commit_root; ret = extent_from_logical(fs_info, logical, path, &found_key); @@ -1214,8 +1236,9 @@ int iterate_inodes_from_logical(u64 logical, struct btrfs_fs_info *fs_info, return ret; extent_item_pos = logical - found_key.objectid; - ret = iterate_extent_inodes(fs_info, path, found_key.objectid, - extent_item_pos, iterate, ctx); + ret = iterate_extent_inodes(fs_info, found_key.objectid, + extent_item_pos, search_commit_root, + iterate, ctx); return ret; } @@ -1336,12 +1359,6 @@ int paths_from_inode(u64 inum, struct inode_fs_paths *ipath) inode_to_path, ipath); } -/* - * allocates space to return multiple file system paths for an inode. - * total_bytes to allocate are passed, note that space usable for actual path - * information will be total_bytes - sizeof(struct inode_fs_paths). - * the returned pointer must be freed with free_ipath() in the end. - */ struct btrfs_data_container *init_data_container(u32 total_bytes) { struct btrfs_data_container *data; @@ -1397,5 +1414,6 @@ struct inode_fs_paths *init_ipath(s32 total_bytes, struct btrfs_root *fs_root, void free_ipath(struct inode_fs_paths *ipath) { + kfree(ipath->fspath); kfree(ipath); } diff --git a/fs/btrfs/backref.h b/fs/btrfs/backref.h index d00dfa9..57ea2e9 100644 --- a/fs/btrfs/backref.h +++ b/fs/btrfs/backref.h @@ -22,6 +22,8 @@ #include "ioctl.h" #include "ulist.h" +#define BTRFS_BACKREF_SEARCH_COMMIT_ROOT ((struct btrfs_trans_handle *)0) + struct inode_fs_paths { struct btrfs_path *btrfs_path; struct btrfs_root *fs_root; @@ -44,9 +46,8 @@ int tree_backref_for_extent(unsigned long *ptr, struct extent_buffer *eb, u64 *out_root, u8 *out_level); int iterate_extent_inodes(struct btrfs_fs_info *fs_info, - struct btrfs_path *path, u64 extent_item_objectid, - u64 extent_offset, + u64 extent_offset, int search_commit_root, iterate_extent_inodes_t *iterate, void *ctx); int iterate_inodes_from_logical(u64 logical, struct btrfs_fs_info *fs_info, diff --git a/fs/btrfs/check-integrity.c b/fs/btrfs/check-integrity.c index b669a7d..c053e90 100644 --- a/fs/btrfs/check-integrity.c +++ b/fs/btrfs/check-integrity.c @@ -89,7 +89,6 @@ #include "disk-io.h" #include "transaction.h" #include "extent_io.h" -#include "disk-io.h" #include "volumes.h" #include "print-tree.h" #include "locking.h" @@ -644,7 +643,7 @@ static struct btrfsic_dev_state *btrfsic_dev_state_hashtable_lookup( static int btrfsic_process_superblock(struct btrfsic_state *state, struct btrfs_fs_devices *fs_devices) { - int ret; + int ret = 0; struct btrfs_super_block *selected_super; struct list_head *dev_head = &fs_devices->devices; struct btrfs_device *device; diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c index 14f1c5a..d286b40 100644 --- a/fs/btrfs/compression.c +++ b/fs/btrfs/compression.c @@ -120,10 +120,10 @@ static int check_compressed_csum(struct inode *inode, page = cb->compressed_pages[i]; csum = ~(u32)0; - kaddr = kmap_atomic(page, KM_USER0); + kaddr = kmap_atomic(page); csum = btrfs_csum_data(root, kaddr, csum, PAGE_CACHE_SIZE); btrfs_csum_final(csum, (char *)&csum); - kunmap_atomic(kaddr, KM_USER0); + kunmap_atomic(kaddr); if (csum != *cb_sum) { printk(KERN_INFO "btrfs csum failed ino %llu " @@ -226,8 +226,8 @@ out: * Clear the writeback bits on all of the file * pages for a compressed write */ -static noinline int end_compressed_writeback(struct inode *inode, u64 start, - unsigned long ram_size) +static noinline void end_compressed_writeback(struct inode *inode, u64 start, + unsigned long ram_size) { unsigned long index = start >> PAGE_CACHE_SHIFT; unsigned long end_index = (start + ram_size - 1) >> PAGE_CACHE_SHIFT; @@ -253,7 +253,6 @@ static noinline int end_compressed_writeback(struct inode *inode, u64 start, index += ret; } /* the inode may be gone now */ - return 0; } /* @@ -392,16 +391,16 @@ int btrfs_submit_compressed_write(struct inode *inode, u64 start, */ atomic_inc(&cb->pending_bios); ret = btrfs_bio_wq_end_io(root->fs_info, bio, 0); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ if (!skip_sum) { ret = btrfs_csum_one_bio(root, inode, bio, start, 1); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ } ret = btrfs_map_bio(root, WRITE, bio, 0, 1); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ bio_put(bio); @@ -421,15 +420,15 @@ int btrfs_submit_compressed_write(struct inode *inode, u64 start, bio_get(bio); ret = btrfs_bio_wq_end_io(root->fs_info, bio, 0); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ if (!skip_sum) { ret = btrfs_csum_one_bio(root, inode, bio, start, 1); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ } ret = btrfs_map_bio(root, WRITE, bio, 0, 1); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ bio_put(bio); return 0; @@ -497,7 +496,7 @@ static noinline int add_ra_bio_pages(struct inode *inode, * sure they map to this compressed extent on disk. */ set_page_extent_mapped(page); - lock_extent(tree, last_offset, end, GFP_NOFS); + lock_extent(tree, last_offset, end); read_lock(&em_tree->lock); em = lookup_extent_mapping(em_tree, last_offset, PAGE_CACHE_SIZE); @@ -507,7 +506,7 @@ static noinline int add_ra_bio_pages(struct inode *inode, (last_offset + PAGE_CACHE_SIZE > extent_map_end(em)) || (em->block_start >> 9) != cb->orig_bio->bi_sector) { free_extent_map(em); - unlock_extent(tree, last_offset, end, GFP_NOFS); + unlock_extent(tree, last_offset, end); unlock_page(page); page_cache_release(page); break; @@ -521,10 +520,10 @@ static noinline int add_ra_bio_pages(struct inode *inode, if (zero_offset) { int zeros; zeros = PAGE_CACHE_SIZE - zero_offset; - userpage = kmap_atomic(page, KM_USER0); + userpage = kmap_atomic(page); memset(userpage + zero_offset, 0, zeros); flush_dcache_page(page); - kunmap_atomic(userpage, KM_USER0); + kunmap_atomic(userpage); } } @@ -535,7 +534,7 @@ static noinline int add_ra_bio_pages(struct inode *inode, nr_pages++; page_cache_release(page); } else { - unlock_extent(tree, last_offset, end, GFP_NOFS); + unlock_extent(tree, last_offset, end); unlock_page(page); page_cache_release(page); break; @@ -588,6 +587,8 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio, page_offset(bio->bi_io_vec->bv_page), PAGE_CACHE_SIZE); read_unlock(&em_tree->lock); + if (!em) + return -EIO; compressed_len = em->block_len; cb = kmalloc(compressed_bio_size(root, compressed_len), GFP_NOFS); @@ -660,7 +661,7 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio, bio_get(comp_bio); ret = btrfs_bio_wq_end_io(root->fs_info, comp_bio, 0); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ /* * inc the count before we submit the bio so @@ -673,14 +674,14 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio, if (!(BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM)) { ret = btrfs_lookup_bio_sums(root, inode, comp_bio, sums); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ } sums += (comp_bio->bi_size + root->sectorsize - 1) / root->sectorsize; ret = btrfs_map_bio(root, READ, comp_bio, mirror_num, 0); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ bio_put(comp_bio); @@ -696,15 +697,15 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio, bio_get(comp_bio); ret = btrfs_bio_wq_end_io(root->fs_info, comp_bio, 0); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ if (!(BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM)) { ret = btrfs_lookup_bio_sums(root, inode, comp_bio, sums); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ } ret = btrfs_map_bio(root, READ, comp_bio, mirror_num, 0); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ bio_put(comp_bio); return 0; @@ -732,7 +733,7 @@ struct btrfs_compress_op *btrfs_compress_op[] = { &btrfs_lzo_compress, }; -int __init btrfs_init_compress(void) +void __init btrfs_init_compress(void) { int i; @@ -742,7 +743,6 @@ int __init btrfs_init_compress(void) atomic_set(&comp_alloc_workspace[i], 0); init_waitqueue_head(&comp_workspace_wait[i]); } - return 0; } /* @@ -991,9 +991,9 @@ int btrfs_decompress_buf2page(char *buf, unsigned long buf_start, bytes = min(PAGE_CACHE_SIZE - *pg_offset, PAGE_CACHE_SIZE - buf_offset); bytes = min(bytes, working_bytes); - kaddr = kmap_atomic(page_out, KM_USER0); + kaddr = kmap_atomic(page_out); memcpy(kaddr + *pg_offset, buf + buf_offset, bytes); - kunmap_atomic(kaddr, KM_USER0); + kunmap_atomic(kaddr); flush_dcache_page(page_out); *pg_offset += bytes; diff --git a/fs/btrfs/compression.h b/fs/btrfs/compression.h index a12059f..9afb0a6 100644 --- a/fs/btrfs/compression.h +++ b/fs/btrfs/compression.h @@ -19,7 +19,7 @@ #ifndef __BTRFS_COMPRESSION_ #define __BTRFS_COMPRESSION_ -int btrfs_init_compress(void); +void btrfs_init_compress(void); void btrfs_exit_compress(void); int btrfs_compress_pages(int type, struct address_space *mapping, diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c index 0639a55..e801f22 100644 --- a/fs/btrfs/ctree.c +++ b/fs/btrfs/ctree.c @@ -36,7 +36,7 @@ static int balance_node_right(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct extent_buffer *dst_buf, struct extent_buffer *src_buf); -static int del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root, +static void del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, int level, int slot); struct btrfs_path *btrfs_alloc_path(void) @@ -156,10 +156,23 @@ struct extent_buffer *btrfs_root_node(struct btrfs_root *root) { struct extent_buffer *eb; - rcu_read_lock(); - eb = rcu_dereference(root->node); - extent_buffer_get(eb); - rcu_read_unlock(); + while (1) { + rcu_read_lock(); + eb = rcu_dereference(root->node); + + /* + * RCU really hurts here, we could free up the root node because + * it was cow'ed but we may not get the new root node yet so do + * the inc_not_zero dance and if it doesn't work then + * synchronize_rcu and try again. + */ + if (atomic_inc_not_zero(&eb->refs)) { + rcu_read_unlock(); + break; + } + rcu_read_unlock(); + synchronize_rcu(); + } return eb; } @@ -331,8 +344,13 @@ static noinline int update_ref_for_cow(struct btrfs_trans_handle *trans, if (btrfs_block_can_be_shared(root, buf)) { ret = btrfs_lookup_extent_info(trans, root, buf->start, buf->len, &refs, &flags); - BUG_ON(ret); - BUG_ON(refs == 0); + if (ret) + return ret; + if (refs == 0) { + ret = -EROFS; + btrfs_std_error(root->fs_info, ret); + return ret; + } } else { refs = 1; if (root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID || @@ -351,14 +369,14 @@ static noinline int update_ref_for_cow(struct btrfs_trans_handle *trans, root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID) && !(flags & BTRFS_BLOCK_FLAG_FULL_BACKREF)) { ret = btrfs_inc_ref(trans, root, buf, 1, 1); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ if (root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID) { ret = btrfs_dec_ref(trans, root, buf, 0, 1); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ ret = btrfs_inc_ref(trans, root, cow, 1, 1); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ } new_flags |= BTRFS_BLOCK_FLAG_FULL_BACKREF; } else { @@ -368,14 +386,15 @@ static noinline int update_ref_for_cow(struct btrfs_trans_handle *trans, ret = btrfs_inc_ref(trans, root, cow, 1, 1); else ret = btrfs_inc_ref(trans, root, cow, 0, 1); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ } if (new_flags != 0) { ret = btrfs_set_disk_extent_flags(trans, root, buf->start, buf->len, new_flags, 0); - BUG_ON(ret); + if (ret) + return ret; } } else { if (flags & BTRFS_BLOCK_FLAG_FULL_BACKREF) { @@ -384,9 +403,9 @@ static noinline int update_ref_for_cow(struct btrfs_trans_handle *trans, ret = btrfs_inc_ref(trans, root, cow, 1, 1); else ret = btrfs_inc_ref(trans, root, cow, 0, 1); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ ret = btrfs_dec_ref(trans, root, buf, 1, 1); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ } clean_tree_block(trans, root, buf); *last_ref = 1; @@ -415,7 +434,7 @@ static noinline int __btrfs_cow_block(struct btrfs_trans_handle *trans, { struct btrfs_disk_key disk_key; struct extent_buffer *cow; - int level; + int level, ret; int last_ref = 0; int unlock_orig = 0; u64 parent_start; @@ -467,7 +486,11 @@ static noinline int __btrfs_cow_block(struct btrfs_trans_handle *trans, (unsigned long)btrfs_header_fsid(cow), BTRFS_FSID_SIZE); - update_ref_for_cow(trans, root, buf, cow, &last_ref); + ret = update_ref_for_cow(trans, root, buf, cow, &last_ref); + if (ret) { + btrfs_abort_transaction(trans, root, ret); + return ret; + } if (root->ref_cows) btrfs_reloc_cow_block(trans, root, buf, cow); @@ -504,7 +527,7 @@ static noinline int __btrfs_cow_block(struct btrfs_trans_handle *trans, } if (unlock_orig) btrfs_tree_unlock(buf); - free_extent_buffer(buf); + free_extent_buffer_stale(buf); btrfs_mark_buffer_dirty(cow); *cow_ret = cow; return 0; @@ -934,7 +957,12 @@ static noinline int balance_level(struct btrfs_trans_handle *trans, /* promote the child to a root */ child = read_node_slot(root, mid, 0); - BUG_ON(!child); + if (!child) { + ret = -EROFS; + btrfs_std_error(root->fs_info, ret); + goto enospc; + } + btrfs_tree_lock(child); btrfs_set_lock_blocking(child); ret = btrfs_cow_block(trans, root, child, mid, 0, &child); @@ -959,7 +987,7 @@ static noinline int balance_level(struct btrfs_trans_handle *trans, root_sub_used(root, mid->len); btrfs_free_tree_block(trans, root, mid, 0, 1, 0); /* once for the root ptr */ - free_extent_buffer(mid); + free_extent_buffer_stale(mid); return 0; } if (btrfs_header_nritems(mid) > @@ -1010,13 +1038,10 @@ static noinline int balance_level(struct btrfs_trans_handle *trans, if (btrfs_header_nritems(right) == 0) { clean_tree_block(trans, root, right); btrfs_tree_unlock(right); - wret = del_ptr(trans, root, path, level + 1, pslot + - 1); - if (wret) - ret = wret; + del_ptr(trans, root, path, level + 1, pslot + 1); root_sub_used(root, right->len); btrfs_free_tree_block(trans, root, right, 0, 1, 0); - free_extent_buffer(right); + free_extent_buffer_stale(right); right = NULL; } else { struct btrfs_disk_key right_key; @@ -1035,7 +1060,11 @@ static noinline int balance_level(struct btrfs_trans_handle *trans, * otherwise we would have pulled some pointers from the * right */ - BUG_ON(!left); + if (!left) { + ret = -EROFS; + btrfs_std_error(root->fs_info, ret); + goto enospc; + } wret = balance_node_right(trans, root, mid, left); if (wret < 0) { ret = wret; @@ -1051,12 +1080,10 @@ static noinline int balance_level(struct btrfs_trans_handle *trans, if (btrfs_header_nritems(mid) == 0) { clean_tree_block(trans, root, mid); btrfs_tree_unlock(mid); - wret = del_ptr(trans, root, path, level + 1, pslot); - if (wret) - ret = wret; + del_ptr(trans, root, path, level + 1, pslot); root_sub_used(root, mid->len); btrfs_free_tree_block(trans, root, mid, 0, 1, 0); - free_extent_buffer(mid); + free_extent_buffer_stale(mid); mid = NULL; } else { /* update the parent key to reflect our changes */ @@ -1382,7 +1409,8 @@ static noinline int reada_for_balance(struct btrfs_root *root, * if lowest_unlock is 1, level 0 won't be unlocked */ static noinline void unlock_up(struct btrfs_path *path, int level, - int lowest_unlock) + int lowest_unlock, int min_write_lock_level, + int *write_lock_level) { int i; int skip_level = level; @@ -1414,6 +1442,11 @@ static noinline void unlock_up(struct btrfs_path *path, int level, if (i >= lowest_unlock && i > skip_level && path->locks[i]) { btrfs_tree_unlock_rw(t, path->locks[i]); path->locks[i] = 0; + if (write_lock_level && + i > min_write_lock_level && + i <= *write_lock_level) { + *write_lock_level = i - 1; + } } } } @@ -1637,6 +1670,7 @@ int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root /* everything at write_lock_level or lower must be write locked */ int write_lock_level = 0; u8 lowest_level = 0; + int min_write_lock_level; lowest_level = p->lowest_level; WARN_ON(lowest_level && ins_len > 0); @@ -1664,6 +1698,8 @@ int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root if (cow && (p->keep_locks || p->lowest_level)) write_lock_level = BTRFS_MAX_LEVEL; + min_write_lock_level = write_lock_level; + again: /* * we try very hard to do read locks on the root @@ -1795,7 +1831,8 @@ cow_done: goto again; } - unlock_up(p, level, lowest_unlock); + unlock_up(p, level, lowest_unlock, + min_write_lock_level, &write_lock_level); if (level == lowest_level) { if (dec) @@ -1857,7 +1894,8 @@ cow_done: } } if (!p->search_for_split) - unlock_up(p, level, lowest_unlock); + unlock_up(p, level, lowest_unlock, + min_write_lock_level, &write_lock_level); goto done; } } @@ -1881,15 +1919,12 @@ done: * fixing up pointers when a given leaf/node is not in slot 0 of the * higher levels * - * If this fails to write a tree block, it returns -1, but continues - * fixing up the blocks in ram so the tree is consistent. */ -static int fixup_low_keys(struct btrfs_trans_handle *trans, - struct btrfs_root *root, struct btrfs_path *path, - struct btrfs_disk_key *key, int level) +static void fixup_low_keys(struct btrfs_trans_handle *trans, + struct btrfs_root *root, struct btrfs_path *path, + struct btrfs_disk_key *key, int level) { int i; - int ret = 0; struct extent_buffer *t; for (i = level; i < BTRFS_MAX_LEVEL; i++) { @@ -1902,7 +1937,6 @@ static int fixup_low_keys(struct btrfs_trans_handle *trans, if (tslot != 0) break; } - return ret; } /* @@ -1911,9 +1945,9 @@ static int fixup_low_keys(struct btrfs_trans_handle *trans, * This function isn't completely safe. It's the caller's responsibility * that the new key won't break the order */ -int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans, - struct btrfs_root *root, struct btrfs_path *path, - struct btrfs_key *new_key) +void btrfs_set_item_key_safe(struct btrfs_trans_handle *trans, + struct btrfs_root *root, struct btrfs_path *path, + struct btrfs_key *new_key) { struct btrfs_disk_key disk_key; struct extent_buffer *eb; @@ -1923,13 +1957,11 @@ int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans, slot = path->slots[0]; if (slot > 0) { btrfs_item_key(eb, &disk_key, slot - 1); - if (comp_keys(&disk_key, new_key) >= 0) - return -1; + BUG_ON(comp_keys(&disk_key, new_key) >= 0); } if (slot < btrfs_header_nritems(eb) - 1) { btrfs_item_key(eb, &disk_key, slot + 1); - if (comp_keys(&disk_key, new_key) <= 0) - return -1; + BUG_ON(comp_keys(&disk_key, new_key) <= 0); } btrfs_cpu_key_to_disk(&disk_key, new_key); @@ -1937,7 +1969,6 @@ int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans, btrfs_mark_buffer_dirty(eb); if (slot == 0) fixup_low_keys(trans, root, path, &disk_key, 1); - return 0; } /* @@ -2140,12 +2171,11 @@ static noinline int insert_new_root(struct btrfs_trans_handle *trans, * * slot and level indicate where you want the key to go, and * blocknr is the block the key points to. - * - * returns zero on success and < 0 on any error */ -static int insert_ptr(struct btrfs_trans_handle *trans, struct btrfs_root - *root, struct btrfs_path *path, struct btrfs_disk_key - *key, u64 bytenr, int slot, int level) +static void insert_ptr(struct btrfs_trans_handle *trans, + struct btrfs_root *root, struct btrfs_path *path, + struct btrfs_disk_key *key, u64 bytenr, + int slot, int level) { struct extent_buffer *lower; int nritems; @@ -2155,8 +2185,7 @@ static int insert_ptr(struct btrfs_trans_handle *trans, struct btrfs_root lower = path->nodes[level]; nritems = btrfs_header_nritems(lower); BUG_ON(slot > nritems); - if (nritems == BTRFS_NODEPTRS_PER_BLOCK(root)) - BUG(); + BUG_ON(nritems == BTRFS_NODEPTRS_PER_BLOCK(root)); if (slot != nritems) { memmove_extent_buffer(lower, btrfs_node_key_ptr_offset(slot + 1), @@ -2169,7 +2198,6 @@ static int insert_ptr(struct btrfs_trans_handle *trans, struct btrfs_root btrfs_set_node_ptr_generation(lower, slot, trans->transid); btrfs_set_header_nritems(lower, nritems + 1); btrfs_mark_buffer_dirty(lower); - return 0; } /* @@ -2190,7 +2218,6 @@ static noinline int split_node(struct btrfs_trans_handle *trans, struct btrfs_disk_key disk_key; int mid; int ret; - int wret; u32 c_nritems; c = path->nodes[level]; @@ -2247,11 +2274,8 @@ static noinline int split_node(struct btrfs_trans_handle *trans, btrfs_mark_buffer_dirty(c); btrfs_mark_buffer_dirty(split); - wret = insert_ptr(trans, root, path, &disk_key, split->start, - path->slots[level + 1] + 1, - level + 1); - if (wret) - ret = wret; + insert_ptr(trans, root, path, &disk_key, split->start, + path->slots[level + 1] + 1, level + 1); if (path->slots[level] >= mid) { path->slots[level] -= mid; @@ -2320,6 +2344,7 @@ static noinline int __push_leaf_right(struct btrfs_trans_handle *trans, { struct extent_buffer *left = path->nodes[0]; struct extent_buffer *upper = path->nodes[1]; + struct btrfs_map_token token; struct btrfs_disk_key disk_key; int slot; u32 i; @@ -2331,6 +2356,8 @@ static noinline int __push_leaf_right(struct btrfs_trans_handle *trans, u32 data_end; u32 this_item_size; + btrfs_init_map_token(&token); + if (empty) nr = 0; else @@ -2408,8 +2435,8 @@ static noinline int __push_leaf_right(struct btrfs_trans_handle *trans, push_space = BTRFS_LEAF_DATA_SIZE(root); for (i = 0; i < right_nritems; i++) { item = btrfs_item_nr(right, i); - push_space -= btrfs_item_size(right, item); - btrfs_set_item_offset(right, item, push_space); + push_space -= btrfs_token_item_size(right, item, &token); + btrfs_set_token_item_offset(right, item, push_space, &token); } left_nritems -= push_items; @@ -2537,9 +2564,11 @@ static noinline int __push_leaf_left(struct btrfs_trans_handle *trans, u32 old_left_nritems; u32 nr; int ret = 0; - int wret; u32 this_item_size; u32 old_left_item_size; + struct btrfs_map_token token; + + btrfs_init_map_token(&token); if (empty) nr = min(right_nritems, max_slot); @@ -2600,9 +2629,10 @@ static noinline int __push_leaf_left(struct btrfs_trans_handle *trans, item = btrfs_item_nr(left, i); - ioff = btrfs_item_offset(left, item); - btrfs_set_item_offset(left, item, - ioff - (BTRFS_LEAF_DATA_SIZE(root) - old_left_item_size)); + ioff = btrfs_token_item_offset(left, item, &token); + btrfs_set_token_item_offset(left, item, + ioff - (BTRFS_LEAF_DATA_SIZE(root) - old_left_item_size), + &token); } btrfs_set_header_nritems(left, old_left_nritems + push_items); @@ -2632,8 +2662,9 @@ static noinline int __push_leaf_left(struct btrfs_trans_handle *trans, for (i = 0; i < right_nritems; i++) { item = btrfs_item_nr(right, i); - push_space = push_space - btrfs_item_size(right, item); - btrfs_set_item_offset(right, item, push_space); + push_space = push_space - btrfs_token_item_size(right, + item, &token); + btrfs_set_token_item_offset(right, item, push_space, &token); } btrfs_mark_buffer_dirty(left); @@ -2643,9 +2674,7 @@ static noinline int __push_leaf_left(struct btrfs_trans_handle *trans, clean_tree_block(trans, root, right); btrfs_item_key(right, &disk_key, 0); - wret = fixup_low_keys(trans, root, path, &disk_key, 1); - if (wret) - ret = wret; + fixup_low_keys(trans, root, path, &disk_key, 1); /* then fixup the leaf pointer in the path */ if (path->slots[0] < push_items) { @@ -2716,7 +2745,8 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root path->nodes[1], slot - 1, &left); if (ret) { /* we hit -ENOSPC, but it isn't fatal here */ - ret = 1; + if (ret == -ENOSPC) + ret = 1; goto out; } @@ -2738,22 +2768,21 @@ out: /* * split the path's leaf in two, making sure there is at least data_size * available for the resulting leaf level of the path. - * - * returns 0 if all went well and < 0 on failure. */ -static noinline int copy_for_split(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - struct btrfs_path *path, - struct extent_buffer *l, - struct extent_buffer *right, - int slot, int mid, int nritems) +static noinline void copy_for_split(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct btrfs_path *path, + struct extent_buffer *l, + struct extent_buffer *right, + int slot, int mid, int nritems) { int data_copy_size; int rt_data_off; int i; - int ret = 0; - int wret; struct btrfs_disk_key disk_key; + struct btrfs_map_token token; + + btrfs_init_map_token(&token); nritems = nritems - mid; btrfs_set_header_nritems(right, nritems); @@ -2775,17 +2804,15 @@ static noinline int copy_for_split(struct btrfs_trans_handle *trans, struct btrfs_item *item = btrfs_item_nr(right, i); u32 ioff; - ioff = btrfs_item_offset(right, item); - btrfs_set_item_offset(right, item, ioff + rt_data_off); + ioff = btrfs_token_item_offset(right, item, &token); + btrfs_set_token_item_offset(right, item, + ioff + rt_data_off, &token); } btrfs_set_header_nritems(l, mid); - ret = 0; btrfs_item_key(right, &disk_key, 0); - wret = insert_ptr(trans, root, path, &disk_key, right->start, - path->slots[1] + 1, 1); - if (wret) - ret = wret; + insert_ptr(trans, root, path, &disk_key, right->start, + path->slots[1] + 1, 1); btrfs_mark_buffer_dirty(right); btrfs_mark_buffer_dirty(l); @@ -2803,8 +2830,6 @@ static noinline int copy_for_split(struct btrfs_trans_handle *trans, } BUG_ON(path->slots[0] < 0); - - return ret; } /* @@ -2993,12 +3018,8 @@ again: if (split == 0) { if (mid <= slot) { btrfs_set_header_nritems(right, 0); - wret = insert_ptr(trans, root, path, - &disk_key, right->start, - path->slots[1] + 1, 1); - if (wret) - ret = wret; - + insert_ptr(trans, root, path, &disk_key, right->start, + path->slots[1] + 1, 1); btrfs_tree_unlock(path->nodes[0]); free_extent_buffer(path->nodes[0]); path->nodes[0] = right; @@ -3006,29 +3027,21 @@ again: path->slots[1] += 1; } else { btrfs_set_header_nritems(right, 0); - wret = insert_ptr(trans, root, path, - &disk_key, - right->start, + insert_ptr(trans, root, path, &disk_key, right->start, path->slots[1], 1); - if (wret) - ret = wret; btrfs_tree_unlock(path->nodes[0]); free_extent_buffer(path->nodes[0]); path->nodes[0] = right; path->slots[0] = 0; - if (path->slots[1] == 0) { - wret = fixup_low_keys(trans, root, - path, &disk_key, 1); - if (wret) - ret = wret; - } + if (path->slots[1] == 0) + fixup_low_keys(trans, root, path, + &disk_key, 1); } btrfs_mark_buffer_dirty(right); return ret; } - ret = copy_for_split(trans, root, path, l, right, slot, mid, nritems); - BUG_ON(ret); + copy_for_split(trans, root, path, l, right, slot, mid, nritems); if (split == 2) { BUG_ON(num_doubles != 0); @@ -3036,7 +3049,7 @@ again: goto again; } - return ret; + return 0; push_for_double: push_for_double_split(trans, root, path, data_size); @@ -3238,11 +3251,9 @@ int btrfs_duplicate_item(struct btrfs_trans_handle *trans, return ret; path->slots[0]++; - ret = setup_items_for_insert(trans, root, path, new_key, &item_size, - item_size, item_size + - sizeof(struct btrfs_item), 1); - BUG_ON(ret); - + setup_items_for_insert(trans, root, path, new_key, &item_size, + item_size, item_size + + sizeof(struct btrfs_item), 1); leaf = path->nodes[0]; memcpy_extent_buffer(leaf, btrfs_item_ptr_offset(leaf, path->slots[0]), @@ -3257,10 +3268,10 @@ int btrfs_duplicate_item(struct btrfs_trans_handle *trans, * off the end of the item or if we shift the item to chop bytes off * the front. */ -int btrfs_truncate_item(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - struct btrfs_path *path, - u32 new_size, int from_end) +void btrfs_truncate_item(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct btrfs_path *path, + u32 new_size, int from_end) { int slot; struct extent_buffer *leaf; @@ -3271,13 +3282,16 @@ int btrfs_truncate_item(struct btrfs_trans_handle *trans, unsigned int old_size; unsigned int size_diff; int i; + struct btrfs_map_token token; + + btrfs_init_map_token(&token); leaf = path->nodes[0]; slot = path->slots[0]; old_size = btrfs_item_size_nr(leaf, slot); if (old_size == new_size) - return 0; + return; nritems = btrfs_header_nritems(leaf); data_end = leaf_data_end(root, leaf); @@ -3297,8 +3311,9 @@ int btrfs_truncate_item(struct btrfs_trans_handle *trans, u32 ioff; item = btrfs_item_nr(leaf, i); - ioff = btrfs_item_offset(leaf, item); - btrfs_set_item_offset(leaf, item, ioff + size_diff); + ioff = btrfs_token_item_offset(leaf, item, &token); + btrfs_set_token_item_offset(leaf, item, + ioff + size_diff, &token); } /* shift the data */ @@ -3350,15 +3365,14 @@ int btrfs_truncate_item(struct btrfs_trans_handle *trans, btrfs_print_leaf(root, leaf); BUG(); } - return 0; } /* * make the item pointed to by the path bigger, data_size is the new size. */ -int btrfs_extend_item(struct btrfs_trans_handle *trans, - struct btrfs_root *root, struct btrfs_path *path, - u32 data_size) +void btrfs_extend_item(struct btrfs_trans_handle *trans, + struct btrfs_root *root, struct btrfs_path *path, + u32 data_size) { int slot; struct extent_buffer *leaf; @@ -3368,6 +3382,9 @@ int btrfs_extend_item(struct btrfs_trans_handle *trans, unsigned int old_data; unsigned int old_size; int i; + struct btrfs_map_token token; + + btrfs_init_map_token(&token); leaf = path->nodes[0]; @@ -3397,8 +3414,9 @@ int btrfs_extend_item(struct btrfs_trans_handle *trans, u32 ioff; item = btrfs_item_nr(leaf, i); - ioff = btrfs_item_offset(leaf, item); - btrfs_set_item_offset(leaf, item, ioff - data_size); + ioff = btrfs_token_item_offset(leaf, item, &token); + btrfs_set_token_item_offset(leaf, item, + ioff - data_size, &token); } /* shift the data */ @@ -3416,7 +3434,6 @@ int btrfs_extend_item(struct btrfs_trans_handle *trans, btrfs_print_leaf(root, leaf); BUG(); } - return 0; } /* @@ -3441,6 +3458,9 @@ int btrfs_insert_some_items(struct btrfs_trans_handle *trans, unsigned int data_end; struct btrfs_disk_key disk_key; struct btrfs_key found_key; + struct btrfs_map_token token; + + btrfs_init_map_token(&token); for (i = 0; i < nr; i++) { if (total_size + data_size[i] + sizeof(struct btrfs_item) > @@ -3506,8 +3526,9 @@ int btrfs_insert_some_items(struct btrfs_trans_handle *trans, u32 ioff; item = btrfs_item_nr(leaf, i); - ioff = btrfs_item_offset(leaf, item); - btrfs_set_item_offset(leaf, item, ioff - total_data); + ioff = btrfs_token_item_offset(leaf, item, &token); + btrfs_set_token_item_offset(leaf, item, + ioff - total_data, &token); } /* shift the items */ memmove_extent_buffer(leaf, btrfs_item_nr_offset(slot + nr), @@ -3534,9 +3555,10 @@ int btrfs_insert_some_items(struct btrfs_trans_handle *trans, btrfs_cpu_key_to_disk(&disk_key, cpu_key + i); btrfs_set_item_key(leaf, &disk_key, slot + i); item = btrfs_item_nr(leaf, slot + i); - btrfs_set_item_offset(leaf, item, data_end - data_size[i]); + btrfs_set_token_item_offset(leaf, item, + data_end - data_size[i], &token); data_end -= data_size[i]; - btrfs_set_item_size(leaf, item, data_size[i]); + btrfs_set_token_item_size(leaf, item, data_size[i], &token); } btrfs_set_header_nritems(leaf, nritems + nr); btrfs_mark_buffer_dirty(leaf); @@ -3544,7 +3566,7 @@ int btrfs_insert_some_items(struct btrfs_trans_handle *trans, ret = 0; if (slot == 0) { btrfs_cpu_key_to_disk(&disk_key, cpu_key); - ret = fixup_low_keys(trans, root, path, &disk_key, 1); + fixup_low_keys(trans, root, path, &disk_key, 1); } if (btrfs_leaf_free_space(root, leaf) < 0) { @@ -3562,19 +3584,21 @@ out: * to save stack depth by doing the bulk of the work in a function * that doesn't call btrfs_search_slot */ -int setup_items_for_insert(struct btrfs_trans_handle *trans, - struct btrfs_root *root, struct btrfs_path *path, - struct btrfs_key *cpu_key, u32 *data_size, - u32 total_data, u32 total_size, int nr) +void setup_items_for_insert(struct btrfs_trans_handle *trans, + struct btrfs_root *root, struct btrfs_path *path, + struct btrfs_key *cpu_key, u32 *data_size, + u32 total_data, u32 total_size, int nr) { struct btrfs_item *item; int i; u32 nritems; unsigned int data_end; struct btrfs_disk_key disk_key; - int ret; struct extent_buffer *leaf; int slot; + struct btrfs_map_token token; + + btrfs_init_map_token(&token); leaf = path->nodes[0]; slot = path->slots[0]; @@ -3606,8 +3630,9 @@ int setup_items_for_insert(struct btrfs_trans_handle *trans, u32 ioff; item = btrfs_item_nr(leaf, i); - ioff = btrfs_item_offset(leaf, item); - btrfs_set_item_offset(leaf, item, ioff - total_data); + ioff = btrfs_token_item_offset(leaf, item, &token); + btrfs_set_token_item_offset(leaf, item, + ioff - total_data, &token); } /* shift the items */ memmove_extent_buffer(leaf, btrfs_item_nr_offset(slot + nr), @@ -3626,17 +3651,17 @@ int setup_items_for_insert(struct btrfs_trans_handle *trans, btrfs_cpu_key_to_disk(&disk_key, cpu_key + i); btrfs_set_item_key(leaf, &disk_key, slot + i); item = btrfs_item_nr(leaf, slot + i); - btrfs_set_item_offset(leaf, item, data_end - data_size[i]); + btrfs_set_token_item_offset(leaf, item, + data_end - data_size[i], &token); data_end -= data_size[i]; - btrfs_set_item_size(leaf, item, data_size[i]); + btrfs_set_token_item_size(leaf, item, data_size[i], &token); } btrfs_set_header_nritems(leaf, nritems + nr); - ret = 0; if (slot == 0) { btrfs_cpu_key_to_disk(&disk_key, cpu_key); - ret = fixup_low_keys(trans, root, path, &disk_key, 1); + fixup_low_keys(trans, root, path, &disk_key, 1); } btrfs_unlock_up_safe(path, 1); btrfs_mark_buffer_dirty(leaf); @@ -3645,7 +3670,6 @@ int setup_items_for_insert(struct btrfs_trans_handle *trans, btrfs_print_leaf(root, leaf); BUG(); } - return ret; } /* @@ -3672,16 +3696,14 @@ int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, if (ret == 0) return -EEXIST; if (ret < 0) - goto out; + return ret; slot = path->slots[0]; BUG_ON(slot < 0); - ret = setup_items_for_insert(trans, root, path, cpu_key, data_size, + setup_items_for_insert(trans, root, path, cpu_key, data_size, total_data, total_size, nr); - -out: - return ret; + return 0; } /* @@ -3717,13 +3739,11 @@ int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root * the tree should have been previously balanced so the deletion does not * empty a node. */ -static int del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root, - struct btrfs_path *path, int level, int slot) +static void del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root, + struct btrfs_path *path, int level, int slot) { struct extent_buffer *parent = path->nodes[level]; u32 nritems; - int ret = 0; - int wret; nritems = btrfs_header_nritems(parent); if (slot != nritems - 1) { @@ -3743,12 +3763,9 @@ static int del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_disk_key disk_key; btrfs_node_key(parent, &disk_key, 0); - wret = fixup_low_keys(trans, root, path, &disk_key, level + 1); - if (wret) - ret = wret; + fixup_low_keys(trans, root, path, &disk_key, level + 1); } btrfs_mark_buffer_dirty(parent); - return ret; } /* @@ -3761,17 +3778,13 @@ static int del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root, * The path must have already been setup for deleting the leaf, including * all the proper balancing. path->nodes[1] must be locked. */ -static noinline int btrfs_del_leaf(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - struct btrfs_path *path, - struct extent_buffer *leaf) +static noinline void btrfs_del_leaf(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct btrfs_path *path, + struct extent_buffer *leaf) { - int ret; - WARN_ON(btrfs_header_generation(leaf) != trans->transid); - ret = del_ptr(trans, root, path, 1, path->slots[1]); - if (ret) - return ret; + del_ptr(trans, root, path, 1, path->slots[1]); /* * btrfs_free_extent is expensive, we want to make sure we @@ -3781,8 +3794,9 @@ static noinline int btrfs_del_leaf(struct btrfs_trans_handle *trans, root_sub_used(root, leaf->len); + extent_buffer_get(leaf); btrfs_free_tree_block(trans, root, leaf, 0, 1, 0); - return 0; + free_extent_buffer_stale(leaf); } /* * delete the item at the leaf level in path. If that empties @@ -3799,6 +3813,9 @@ int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, int wret; int i; u32 nritems; + struct btrfs_map_token token; + + btrfs_init_map_token(&token); leaf = path->nodes[0]; last_off = btrfs_item_offset_nr(leaf, slot + nr - 1); @@ -3820,8 +3837,9 @@ int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, u32 ioff; item = btrfs_item_nr(leaf, i); - ioff = btrfs_item_offset(leaf, item); - btrfs_set_item_offset(leaf, item, ioff + dsize); + ioff = btrfs_token_item_offset(leaf, item, &token); + btrfs_set_token_item_offset(leaf, item, + ioff + dsize, &token); } memmove_extent_buffer(leaf, btrfs_item_nr_offset(slot), @@ -3839,8 +3857,7 @@ int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, } else { btrfs_set_path_blocking(path); clean_tree_block(trans, root, leaf); - ret = btrfs_del_leaf(trans, root, path, leaf); - BUG_ON(ret); + btrfs_del_leaf(trans, root, path, leaf); } } else { int used = leaf_space_used(leaf, 0, nritems); @@ -3848,10 +3865,7 @@ int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_disk_key disk_key; btrfs_item_key(leaf, &disk_key, 0); - wret = fixup_low_keys(trans, root, path, - &disk_key, 1); - if (wret) - ret = wret; + fixup_low_keys(trans, root, path, &disk_key, 1); } /* delete the leaf if it is mostly empty */ @@ -3879,9 +3893,9 @@ int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, if (btrfs_header_nritems(leaf) == 0) { path->slots[1] = slot; - ret = btrfs_del_leaf(trans, root, path, leaf); - BUG_ON(ret); + btrfs_del_leaf(trans, root, path, leaf); free_extent_buffer(leaf); + ret = 0; } else { /* if we're still in the path, make sure * we're dirty. Otherwise, one of the @@ -4059,18 +4073,18 @@ find_next_key: path->slots[level] = slot; if (level == path->lowest_level) { ret = 0; - unlock_up(path, level, 1); + unlock_up(path, level, 1, 0, NULL); goto out; } btrfs_set_path_blocking(path); cur = read_node_slot(root, cur, slot); - BUG_ON(!cur); + BUG_ON(!cur); /* -ENOMEM */ btrfs_tree_read_lock(cur); path->locks[level - 1] = BTRFS_READ_LOCK; path->nodes[level - 1] = cur; - unlock_up(path, level, 1); + unlock_up(path, level, 1, 0, NULL); btrfs_clear_path_blocking(path, NULL, 0); } out: @@ -4306,7 +4320,7 @@ again: } ret = 0; done: - unlock_up(path, 0, 1); + unlock_up(path, 0, 1, 0, NULL); path->leave_spinning = old_spinning; if (!old_spinning) btrfs_set_path_blocking(path); diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 27ebe61..5b8ef8e 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -48,6 +48,8 @@ struct btrfs_ordered_sum; #define BTRFS_MAGIC "_BHRfS_M" +#define BTRFS_MAX_MIRRORS 2 + #define BTRFS_MAX_LEVEL 8 #define BTRFS_COMPAT_EXTENT_TREE_V0 @@ -138,6 +140,12 @@ struct btrfs_ordered_sum; #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2 /* + * the max metadata block size. This limit is somewhat artificial, + * but the memmove costs go through the roof for larger blocks. + */ +#define BTRFS_MAX_METADATA_BLOCKSIZE 65536 + +/* * we can actually store much bigger names, but lets not confuse the rest * of linux */ @@ -461,6 +469,19 @@ struct btrfs_super_block { #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1) #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2) #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3) +/* + * some patches floated around with a second compression method + * lets save that incompat here for when they do get in + * Note we don't actually support it, we're just reserving the + * number + */ +#define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4) + +/* + * older kernels tried to do bigger metadata blocks, but the + * code was pretty buggy. Lets not let them try anymore. + */ +#define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5) #define BTRFS_FEATURE_COMPAT_SUPP 0ULL #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL @@ -468,6 +489,7 @@ struct btrfs_super_block { (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ + BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO) /* @@ -829,6 +851,21 @@ struct btrfs_csum_item { */ #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48) +#define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \ + BTRFS_AVAIL_ALLOC_BIT_SINGLE) + +static inline u64 chunk_to_extended(u64 flags) +{ + if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0) + flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE; + + return flags; +} +static inline u64 extended_to_chunk(u64 flags) +{ + return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE; +} + struct btrfs_block_group_item { __le64 used; __le64 chunk_objectid; @@ -886,7 +923,7 @@ struct btrfs_block_rsv { u64 reserved; struct btrfs_space_info *space_info; spinlock_t lock; - unsigned int full:1; + unsigned int full; }; /* @@ -1503,6 +1540,7 @@ struct btrfs_ioctl_defrag_range_args { #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) +#define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) @@ -1526,6 +1564,17 @@ struct btrfs_ioctl_defrag_range_args { #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) +struct btrfs_map_token { + struct extent_buffer *eb; + char *kaddr; + unsigned long offset; +}; + +static inline void btrfs_init_map_token (struct btrfs_map_token *token) +{ + memset(token, 0, sizeof(*token)); +} + /* some macros to generate set/get funcs for the struct fields. This * assumes there is a lefoo_to_cpu for every type, so lets make a simple * one for u8: @@ -1549,20 +1598,22 @@ struct btrfs_ioctl_defrag_range_args { #ifndef BTRFS_SETGET_FUNCS #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ u##bits btrfs_##name(struct extent_buffer *eb, type *s); \ +u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, struct btrfs_map_token *token); \ +void btrfs_set_token_##name(struct extent_buffer *eb, type *s, u##bits val, struct btrfs_map_token *token);\ void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val); #endif #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ static inline u##bits btrfs_##name(struct extent_buffer *eb) \ { \ - type *p = page_address(eb->first_page); \ + type *p = page_address(eb->pages[0]); \ u##bits res = le##bits##_to_cpu(p->member); \ return res; \ } \ static inline void btrfs_set_##name(struct extent_buffer *eb, \ u##bits val) \ { \ - type *p = page_address(eb->first_page); \ + type *p = page_address(eb->pages[0]); \ p->member = cpu_to_le##bits(val); \ } @@ -2466,8 +2517,7 @@ int btrfs_reserve_extent(struct btrfs_trans_handle *trans, struct btrfs_root *root, u64 num_bytes, u64 min_alloc_size, u64 empty_size, u64 hint_byte, - u64 search_end, struct btrfs_key *ins, - u64 data); + struct btrfs_key *ins, u64 data); int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct extent_buffer *buf, int full_backref, int for_cow); int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, @@ -2484,8 +2534,8 @@ int btrfs_free_extent(struct btrfs_trans_handle *trans, int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len); int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root, u64 start, u64 len); -int btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans, - struct btrfs_root *root); +void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans, + struct btrfs_root *root); int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, struct btrfs_root *root); int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, @@ -2548,8 +2598,8 @@ void btrfs_block_rsv_release(struct btrfs_root *root, u64 num_bytes); int btrfs_set_block_group_ro(struct btrfs_root *root, struct btrfs_block_group_cache *cache); -int btrfs_set_block_group_rw(struct btrfs_root *root, - struct btrfs_block_group_cache *cache); +void btrfs_set_block_group_rw(struct btrfs_root *root, + struct btrfs_block_group_cache *cache); void btrfs_put_block_group_cache(struct btrfs_fs_info *info); u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); int btrfs_error_unpin_extent_range(struct btrfs_root *root, @@ -2568,9 +2618,9 @@ int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2); int btrfs_previous_item(struct btrfs_root *root, struct btrfs_path *path, u64 min_objectid, int type); -int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans, - struct btrfs_root *root, struct btrfs_path *path, - struct btrfs_key *new_key); +void btrfs_set_item_key_safe(struct btrfs_trans_handle *trans, + struct btrfs_root *root, struct btrfs_path *path, + struct btrfs_key *new_key); struct extent_buffer *btrfs_root_node(struct btrfs_root *root); struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, @@ -2590,12 +2640,13 @@ int btrfs_copy_root(struct btrfs_trans_handle *trans, struct extent_buffer **cow_ret, u64 new_root_objectid); int btrfs_block_can_be_shared(struct btrfs_root *root, struct extent_buffer *buf); -int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root - *root, struct btrfs_path *path, u32 data_size); -int btrfs_truncate_item(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - struct btrfs_path *path, - u32 new_size, int from_end); +void btrfs_extend_item(struct btrfs_trans_handle *trans, + struct btrfs_root *root, struct btrfs_path *path, + u32 data_size); +void btrfs_truncate_item(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct btrfs_path *path, + u32 new_size, int from_end); int btrfs_split_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, @@ -2629,10 +2680,10 @@ static inline int btrfs_del_item(struct btrfs_trans_handle *trans, return btrfs_del_items(trans, root, path, path->slots[0], 1); } -int setup_items_for_insert(struct btrfs_trans_handle *trans, - struct btrfs_root *root, struct btrfs_path *path, - struct btrfs_key *cpu_key, u32 *data_size, - u32 total_data, u32 total_size, int nr); +void setup_items_for_insert(struct btrfs_trans_handle *trans, + struct btrfs_root *root, struct btrfs_path *path, + struct btrfs_key *cpu_key, u32 *data_size, + u32 total_data, u32 total_size, int nr); int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_key *key, void *data, u32 data_size); int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, @@ -2659,9 +2710,9 @@ static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) } int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf); -void btrfs_drop_snapshot(struct btrfs_root *root, - struct btrfs_block_rsv *block_rsv, int update_ref, - int for_reloc); +int __must_check btrfs_drop_snapshot(struct btrfs_root *root, + struct btrfs_block_rsv *block_rsv, + int update_ref, int for_reloc); int btrfs_drop_subtree(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct extent_buffer *node, @@ -2687,24 +2738,6 @@ static inline void free_fs_info(struct btrfs_fs_info *fs_info) kfree(fs_info->super_for_commit); kfree(fs_info); } -/** - * profile_is_valid - tests whether a given profile is valid and reduced - * @flags: profile to validate - * @extended: if true @flags is treated as an extended profile - */ -static inline int profile_is_valid(u64 flags, int extended) -{ - u64 mask = ~BTRFS_BLOCK_GROUP_PROFILE_MASK; - - flags &= ~BTRFS_BLOCK_GROUP_TYPE_MASK; - if (extended) - mask &= ~BTRFS_AVAIL_ALLOC_BIT_SINGLE; - - if (flags & mask) - return 0; - /* true if zero or exactly one bit set */ - return (flags & (~flags + 1)) == flags; -} /* root-item.c */ int btrfs_find_root_ref(struct btrfs_root *tree_root, @@ -2723,9 +2756,10 @@ int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_key *key, struct btrfs_root_item *item); -int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root - *root, struct btrfs_key *key, struct btrfs_root_item - *item); +int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct btrfs_key *key, + struct btrfs_root_item *item); int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct btrfs_root_item *item, struct btrfs_key *key); int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid); @@ -2909,7 +2943,7 @@ int btrfs_orphan_cleanup(struct btrfs_root *root); void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans, struct btrfs_root *root); int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); -int btrfs_invalidate_inodes(struct btrfs_root *root); +void btrfs_invalidate_inodes(struct btrfs_root *root); void btrfs_add_delayed_iput(struct inode *inode); void btrfs_run_delayed_iputs(struct btrfs_root *root); int btrfs_prealloc_file_range(struct inode *inode, int mode, @@ -2961,13 +2995,41 @@ ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size); /* super.c */ int btrfs_parse_options(struct btrfs_root *root, char *options); int btrfs_sync_fs(struct super_block *sb, int wait); +void btrfs_printk(struct btrfs_fs_info *fs_info, const char *fmt, ...); void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function, - unsigned int line, int errno); + unsigned int line, int errno, const char *fmt, ...); + +void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, + struct btrfs_root *root, const char *function, + unsigned int line, int errno); + +#define btrfs_abort_transaction(trans, root, errno) \ +do { \ + __btrfs_abort_transaction(trans, root, __func__, \ + __LINE__, errno); \ +} while (0) #define btrfs_std_error(fs_info, errno) \ do { \ if ((errno)) \ - __btrfs_std_error((fs_info), __func__, __LINE__, (errno));\ + __btrfs_std_error((fs_info), __func__, \ + __LINE__, (errno), NULL); \ +} while (0) + +#define btrfs_error(fs_info, errno, fmt, args...) \ +do { \ + __btrfs_std_error((fs_info), __func__, __LINE__, \ + (errno), fmt, ##args); \ +} while (0) + +void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, + unsigned int line, int errno, const char *fmt, ...); + +#define btrfs_panic(fs_info, errno, fmt, args...) \ +do { \ + struct btrfs_fs_info *_i = (fs_info); \ + __btrfs_panic(_i, __func__, __LINE__, errno, fmt, ##args); \ + BUG_ON(!(_i->mount_opt & BTRFS_MOUNT_PANIC_ON_FATAL_ERROR)); \ } while (0) /* acl.c */ @@ -3003,16 +3065,17 @@ void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans, struct btrfs_pending_snapshot *pending, u64 *bytes_to_reserve); -void btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, +int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, struct btrfs_pending_snapshot *pending); /* scrub.c */ int btrfs_scrub_dev(struct btrfs_root *root, u64 devid, u64 start, u64 end, struct btrfs_scrub_progress *progress, int readonly); -int btrfs_scrub_pause(struct btrfs_root *root); -int btrfs_scrub_pause_super(struct btrfs_root *root); -int btrfs_scrub_continue(struct btrfs_root *root); -int btrfs_scrub_continue_super(struct btrfs_root *root); +void btrfs_scrub_pause(struct btrfs_root *root); +void btrfs_scrub_pause_super(struct btrfs_root *root); +void btrfs_scrub_continue(struct btrfs_root *root); +void btrfs_scrub_continue_super(struct btrfs_root *root); +int __btrfs_scrub_cancel(struct btrfs_fs_info *info); int btrfs_scrub_cancel(struct btrfs_root *root); int btrfs_scrub_cancel_dev(struct btrfs_root *root, struct btrfs_device *dev); int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid); diff --git a/fs/btrfs/delayed-inode.c b/fs/btrfs/delayed-inode.c index fe4cd0f..03e3748 100644 --- a/fs/btrfs/delayed-inode.c +++ b/fs/btrfs/delayed-inode.c @@ -115,6 +115,7 @@ static struct btrfs_delayed_node *btrfs_get_delayed_node(struct inode *inode) return NULL; } +/* Will return either the node or PTR_ERR(-ENOMEM) */ static struct btrfs_delayed_node *btrfs_get_or_create_delayed_node( struct inode *inode) { @@ -836,10 +837,8 @@ static int btrfs_batch_insert_items(struct btrfs_trans_handle *trans, btrfs_clear_path_blocking(path, NULL, 0); /* insert the keys of the items */ - ret = setup_items_for_insert(trans, root, path, keys, data_size, - total_data_size, total_size, nitems); - if (ret) - goto error; + setup_items_for_insert(trans, root, path, keys, data_size, + total_data_size, total_size, nitems); /* insert the dir index items */ slot = path->slots[0]; @@ -1108,16 +1107,25 @@ static int btrfs_update_delayed_inode(struct btrfs_trans_handle *trans, return 0; } -/* Called when committing the transaction. */ +/* + * Called when committing the transaction. + * Returns 0 on success. + * Returns < 0 on error and returns with an aborted transaction with any + * outstanding delayed items cleaned up. + */ int btrfs_run_delayed_items(struct btrfs_trans_handle *trans, struct btrfs_root *root) { + struct btrfs_root *curr_root = root; struct btrfs_delayed_root *delayed_root; struct btrfs_delayed_node *curr_node, *prev_node; struct btrfs_path *path; struct btrfs_block_rsv *block_rsv; int ret = 0; + if (trans->aborted) + return -EIO; + path = btrfs_alloc_path(); if (!path) return -ENOMEM; @@ -1130,17 +1138,18 @@ int btrfs_run_delayed_items(struct btrfs_trans_handle *trans, curr_node = btrfs_first_delayed_node(delayed_root); while (curr_node) { - root = curr_node->root; - ret = btrfs_insert_delayed_items(trans, path, root, + curr_root = curr_node->root; + ret = btrfs_insert_delayed_items(trans, path, curr_root, curr_node); if (!ret) - ret = btrfs_delete_delayed_items(trans, path, root, - curr_node); + ret = btrfs_delete_delayed_items(trans, path, + curr_root, curr_node); if (!ret) - ret = btrfs_update_delayed_inode(trans, root, path, - curr_node); + ret = btrfs_update_delayed_inode(trans, curr_root, + path, curr_node); if (ret) { btrfs_release_delayed_node(curr_node); + btrfs_abort_transaction(trans, root, ret); break; } @@ -1151,6 +1160,7 @@ int btrfs_run_delayed_items(struct btrfs_trans_handle *trans, btrfs_free_path(path); trans->block_rsv = block_rsv; + return ret; } @@ -1371,6 +1381,7 @@ void btrfs_balance_delayed_items(struct btrfs_root *root) btrfs_wq_run_delayed_node(delayed_root, root, 0); } +/* Will return 0 or -ENOMEM */ int btrfs_insert_delayed_dir_index(struct btrfs_trans_handle *trans, struct btrfs_root *root, const char *name, int name_len, struct inode *dir, diff --git a/fs/btrfs/delayed-ref.c b/fs/btrfs/delayed-ref.c index 66e4f29..69f22e3 100644 --- a/fs/btrfs/delayed-ref.c +++ b/fs/btrfs/delayed-ref.c @@ -420,7 +420,7 @@ update_existing_head_ref(struct btrfs_delayed_ref_node *existing, * this does all the dirty work in terms of maintaining the correct * overall modification count. */ -static noinline int add_delayed_ref_head(struct btrfs_fs_info *fs_info, +static noinline void add_delayed_ref_head(struct btrfs_fs_info *fs_info, struct btrfs_trans_handle *trans, struct btrfs_delayed_ref_node *ref, u64 bytenr, u64 num_bytes, @@ -487,20 +487,19 @@ static noinline int add_delayed_ref_head(struct btrfs_fs_info *fs_info, * we've updated the existing ref, free the newly * allocated ref */ - kfree(ref); + kfree(head_ref); } else { delayed_refs->num_heads++; delayed_refs->num_heads_ready++; delayed_refs->num_entries++; trans->delayed_ref_updates++; } - return 0; } /* * helper to insert a delayed tree ref into the rbtree. */ -static noinline int add_delayed_tree_ref(struct btrfs_fs_info *fs_info, +static noinline void add_delayed_tree_ref(struct btrfs_fs_info *fs_info, struct btrfs_trans_handle *trans, struct btrfs_delayed_ref_node *ref, u64 bytenr, u64 num_bytes, u64 parent, @@ -549,18 +548,17 @@ static noinline int add_delayed_tree_ref(struct btrfs_fs_info *fs_info, * we've updated the existing ref, free the newly * allocated ref */ - kfree(ref); + kfree(full_ref); } else { delayed_refs->num_entries++; trans->delayed_ref_updates++; } - return 0; } /* * helper to insert a delayed data ref into the rbtree. */ -static noinline int add_delayed_data_ref(struct btrfs_fs_info *fs_info, +static noinline void add_delayed_data_ref(struct btrfs_fs_info *fs_info, struct btrfs_trans_handle *trans, struct btrfs_delayed_ref_node *ref, u64 bytenr, u64 num_bytes, u64 parent, @@ -611,12 +609,11 @@ static noinline int add_delayed_data_ref(struct btrfs_fs_info *fs_info, * we've updated the existing ref, free the newly * allocated ref */ - kfree(ref); + kfree(full_ref); } else { delayed_refs->num_entries++; trans->delayed_ref_updates++; } - return 0; } /* @@ -634,7 +631,6 @@ int btrfs_add_delayed_tree_ref(struct btrfs_fs_info *fs_info, struct btrfs_delayed_tree_ref *ref; struct btrfs_delayed_ref_head *head_ref; struct btrfs_delayed_ref_root *delayed_refs; - int ret; BUG_ON(extent_op && extent_op->is_data); ref = kmalloc(sizeof(*ref), GFP_NOFS); @@ -656,14 +652,12 @@ int btrfs_add_delayed_tree_ref(struct btrfs_fs_info *fs_info, * insert both the head node and the new ref without dropping * the spin lock */ - ret = add_delayed_ref_head(fs_info, trans, &head_ref->node, bytenr, + add_delayed_ref_head(fs_info, trans, &head_ref->node, bytenr, num_bytes, action, 0); - BUG_ON(ret); - ret = add_delayed_tree_ref(fs_info, trans, &ref->node, bytenr, + add_delayed_tree_ref(fs_info, trans, &ref->node, bytenr, num_bytes, parent, ref_root, level, action, for_cow); - BUG_ON(ret); if (!need_ref_seq(for_cow, ref_root) && waitqueue_active(&delayed_refs->seq_wait)) wake_up(&delayed_refs->seq_wait); @@ -685,7 +679,6 @@ int btrfs_add_delayed_data_ref(struct btrfs_fs_info *fs_info, struct btrfs_delayed_data_ref *ref; struct btrfs_delayed_ref_head *head_ref; struct btrfs_delayed_ref_root *delayed_refs; - int ret; BUG_ON(extent_op && !extent_op->is_data); ref = kmalloc(sizeof(*ref), GFP_NOFS); @@ -707,14 +700,12 @@ int btrfs_add_delayed_data_ref(struct btrfs_fs_info *fs_info, * insert both the head node and the new ref without dropping * the spin lock */ - ret = add_delayed_ref_head(fs_info, trans, &head_ref->node, bytenr, + add_delayed_ref_head(fs_info, trans, &head_ref->node, bytenr, num_bytes, action, 1); - BUG_ON(ret); - ret = add_delayed_data_ref(fs_info, trans, &ref->node, bytenr, + add_delayed_data_ref(fs_info, trans, &ref->node, bytenr, num_bytes, parent, ref_root, owner, offset, action, for_cow); - BUG_ON(ret); if (!need_ref_seq(for_cow, ref_root) && waitqueue_active(&delayed_refs->seq_wait)) wake_up(&delayed_refs->seq_wait); @@ -729,7 +720,6 @@ int btrfs_add_delayed_extent_op(struct btrfs_fs_info *fs_info, { struct btrfs_delayed_ref_head *head_ref; struct btrfs_delayed_ref_root *delayed_refs; - int ret; head_ref = kmalloc(sizeof(*head_ref), GFP_NOFS); if (!head_ref) @@ -740,10 +730,9 @@ int btrfs_add_delayed_extent_op(struct btrfs_fs_info *fs_info, delayed_refs = &trans->transaction->delayed_refs; spin_lock(&delayed_refs->lock); - ret = add_delayed_ref_head(fs_info, trans, &head_ref->node, bytenr, + add_delayed_ref_head(fs_info, trans, &head_ref->node, bytenr, num_bytes, BTRFS_UPDATE_DELAYED_HEAD, extent_op->is_data); - BUG_ON(ret); if (waitqueue_active(&delayed_refs->seq_wait)) wake_up(&delayed_refs->seq_wait); diff --git a/fs/btrfs/dir-item.c b/fs/btrfs/dir-item.c index 31d84e7..c1a074d 100644 --- a/fs/btrfs/dir-item.c +++ b/fs/btrfs/dir-item.c @@ -49,9 +49,8 @@ static struct btrfs_dir_item *insert_with_overflow(struct btrfs_trans_handle di = btrfs_match_dir_item_name(root, path, name, name_len); if (di) return ERR_PTR(-EEXIST); - ret = btrfs_extend_item(trans, root, path, data_size); - } - if (ret < 0) + btrfs_extend_item(trans, root, path, data_size); + } else if (ret < 0) return ERR_PTR(ret); WARN_ON(ret > 0); leaf = path->nodes[0]; @@ -116,6 +115,7 @@ int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, * 'location' is the key to stuff into the directory item, 'type' is the * type of the inode we're pointing to, and 'index' is the sequence number * to use for the second index (if one is created). + * Will return 0 or -ENOMEM */ int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, const char *name, int name_len, @@ -383,8 +383,8 @@ int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, start = btrfs_item_ptr_offset(leaf, path->slots[0]); memmove_extent_buffer(leaf, ptr, ptr + sub_item_len, item_len - (ptr + sub_item_len - start)); - ret = btrfs_truncate_item(trans, root, path, - item_len - sub_item_len, 1); + btrfs_truncate_item(trans, root, path, + item_len - sub_item_len, 1); } return ret; } diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 811d9f9..20196f4 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -48,20 +48,19 @@ static struct extent_io_ops btree_extent_io_ops; static void end_workqueue_fn(struct btrfs_work *work); static void free_fs_root(struct btrfs_root *root); -static void btrfs_check_super_valid(struct btrfs_fs_info *fs_info, +static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, int read_only); -static int btrfs_destroy_ordered_operations(struct btrfs_root *root); -static int btrfs_destroy_ordered_extents(struct btrfs_root *root); +static void btrfs_destroy_ordered_operations(struct btrfs_root *root); +static void btrfs_destroy_ordered_extents(struct btrfs_root *root); static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, struct btrfs_root *root); -static int btrfs_destroy_pending_snapshots(struct btrfs_transaction *t); -static int btrfs_destroy_delalloc_inodes(struct btrfs_root *root); +static void btrfs_destroy_pending_snapshots(struct btrfs_transaction *t); +static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root); static int btrfs_destroy_marked_extents(struct btrfs_root *root, struct extent_io_tree *dirty_pages, int mark); static int btrfs_destroy_pinned_extent(struct btrfs_root *root, struct extent_io_tree *pinned_extents); -static int btrfs_cleanup_transaction(struct btrfs_root *root); /* * end_io_wq structs are used to do processing in task context when an IO is @@ -99,6 +98,7 @@ struct async_submit_bio { */ u64 bio_offset; struct btrfs_work work; + int error; }; /* @@ -332,8 +332,8 @@ static int verify_parent_transid(struct extent_io_tree *io_tree, return 0; lock_extent_bits(io_tree, eb->start, eb->start + eb->len - 1, - 0, &cached_state, GFP_NOFS); - if (extent_buffer_uptodate(io_tree, eb, cached_state) && + 0, &cached_state); + if (extent_buffer_uptodate(eb) && btrfs_header_generation(eb) == parent_transid) { ret = 0; goto out; @@ -344,7 +344,7 @@ static int verify_parent_transid(struct extent_io_tree *io_tree, (unsigned long long)parent_transid, (unsigned long long)btrfs_header_generation(eb)); ret = 1; - clear_extent_buffer_uptodate(io_tree, eb, &cached_state); + clear_extent_buffer_uptodate(eb); out: unlock_extent_cached(io_tree, eb->start, eb->start + eb->len - 1, &cached_state, GFP_NOFS); @@ -360,9 +360,11 @@ static int btree_read_extent_buffer_pages(struct btrfs_root *root, u64 start, u64 parent_transid) { struct extent_io_tree *io_tree; + int failed = 0; int ret; int num_copies = 0; int mirror_num = 0; + int failed_mirror = 0; clear_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); io_tree = &BTRFS_I(root->fs_info->btree_inode)->io_tree; @@ -370,9 +372,8 @@ static int btree_read_extent_buffer_pages(struct btrfs_root *root, ret = read_extent_buffer_pages(io_tree, eb, start, WAIT_COMPLETE, btree_get_extent, mirror_num); - if (!ret && - !verify_parent_transid(io_tree, eb, parent_transid)) - return ret; + if (!ret && !verify_parent_transid(io_tree, eb, parent_transid)) + break; /* * This buffer's crc is fine, but its contents are corrupted, so @@ -380,18 +381,31 @@ static int btree_read_extent_buffer_pages(struct btrfs_root *root, * any less wrong. */ if (test_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags)) - return ret; + break; + + if (!failed_mirror) { + failed = 1; + printk(KERN_ERR "failed mirror was %d\n", eb->failed_mirror); + failed_mirror = eb->failed_mirror; + } num_copies = btrfs_num_copies(&root->fs_info->mapping_tree, eb->start, eb->len); if (num_copies == 1) - return ret; + break; mirror_num++; + if (mirror_num == failed_mirror) + mirror_num++; + if (mirror_num > num_copies) - return ret; + break; } - return -EIO; + + if (failed && !ret) + repair_eb_io_failure(root, eb, failed_mirror); + + return ret; } /* @@ -404,50 +418,27 @@ static int csum_dirty_buffer(struct btrfs_root *root, struct page *page) struct extent_io_tree *tree; u64 start = (u64)page->index << PAGE_CACHE_SHIFT; u64 found_start; - unsigned long len; struct extent_buffer *eb; - int ret; tree = &BTRFS_I(page->mapping->host)->io_tree; - if (page->private == EXTENT_PAGE_PRIVATE) { - WARN_ON(1); - goto out; - } - if (!page->private) { - WARN_ON(1); - goto out; - } - len = page->private >> 2; - WARN_ON(len == 0); - - eb = alloc_extent_buffer(tree, start, len, page); - if (eb == NULL) { - WARN_ON(1); - goto out; - } - ret = btree_read_extent_buffer_pages(root, eb, start + PAGE_CACHE_SIZE, - btrfs_header_generation(eb)); - BUG_ON(ret); - WARN_ON(!btrfs_header_flag(eb, BTRFS_HEADER_FLAG_WRITTEN)); - + eb = (struct extent_buffer *)page->private; + if (page != eb->pages[0]) + return 0; found_start = btrfs_header_bytenr(eb); if (found_start != start) { WARN_ON(1); - goto err; + return 0; } - if (eb->first_page != page) { + if (eb->pages[0] != page) { WARN_ON(1); - goto err; + return 0; } if (!PageUptodate(page)) { WARN_ON(1); - goto err; + return 0; } csum_tree_block(root, eb, 0); -err: - free_extent_buffer(eb); -out: return 0; } @@ -537,34 +528,74 @@ static noinline int check_leaf(struct btrfs_root *root, return 0; } +struct extent_buffer *find_eb_for_page(struct extent_io_tree *tree, + struct page *page, int max_walk) +{ + struct extent_buffer *eb; + u64 start = page_offset(page); + u64 target = start; + u64 min_start; + + if (start < max_walk) + min_start = 0; + else + min_start = start - max_walk; + + while (start >= min_start) { + eb = find_extent_buffer(tree, start, 0); + if (eb) { + /* + * we found an extent buffer and it contains our page + * horray! + */ + if (eb->start <= target && + eb->start + eb->len > target) + return eb; + + /* we found an extent buffer that wasn't for us */ + free_extent_buffer(eb); + return NULL; + } + if (start == 0) + break; + start -= PAGE_CACHE_SIZE; + } + return NULL; +} + static int btree_readpage_end_io_hook(struct page *page, u64 start, u64 end, struct extent_state *state) { struct extent_io_tree *tree; u64 found_start; int found_level; - unsigned long len; struct extent_buffer *eb; struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; int ret = 0; + int reads_done; - tree = &BTRFS_I(page->mapping->host)->io_tree; - if (page->private == EXTENT_PAGE_PRIVATE) - goto out; if (!page->private) goto out; - len = page->private >> 2; - WARN_ON(len == 0); + tree = &BTRFS_I(page->mapping->host)->io_tree; + eb = (struct extent_buffer *)page->private; + + /* the pending IO might have been the only thing that kept this buffer + * in memory. Make sure we have a ref for all this other checks + */ + extent_buffer_get(eb); + + reads_done = atomic_dec_and_test(&eb->io_pages); + if (!reads_done) + goto err; - eb = alloc_extent_buffer(tree, start, len, page); - if (eb == NULL) { + if (test_bit(EXTENT_BUFFER_IOERR, &eb->bflags)) { ret = -EIO; - goto out; + goto err; } found_start = btrfs_header_bytenr(eb); - if (found_start != start) { + if (found_start != eb->start) { printk_ratelimited(KERN_INFO "btrfs bad tree block start " "%llu %llu\n", (unsigned long long)found_start, @@ -572,13 +603,6 @@ static int btree_readpage_end_io_hook(struct page *page, u64 start, u64 end, ret = -EIO; goto err; } - if (eb->first_page != page) { - printk(KERN_INFO "btrfs bad first page %lu %lu\n", - eb->first_page->index, page->index); - WARN_ON(1); - ret = -EIO; - goto err; - } if (check_tree_block_fsid(root, eb)) { printk_ratelimited(KERN_INFO "btrfs bad fsid on block %llu\n", (unsigned long long)eb->start); @@ -606,48 +630,31 @@ static int btree_readpage_end_io_hook(struct page *page, u64 start, u64 end, ret = -EIO; } - end = min_t(u64, eb->len, PAGE_CACHE_SIZE); - end = eb->start + end - 1; + if (!ret) + set_extent_buffer_uptodate(eb); err: if (test_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) { clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags); btree_readahead_hook(root, eb, eb->start, ret); } + if (ret) + clear_extent_buffer_uptodate(eb); free_extent_buffer(eb); out: return ret; } -static int btree_io_failed_hook(struct bio *failed_bio, - struct page *page, u64 start, u64 end, - int mirror_num, struct extent_state *state) +static int btree_io_failed_hook(struct page *page, int failed_mirror) { - struct extent_io_tree *tree; - unsigned long len; struct extent_buffer *eb; struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; - tree = &BTRFS_I(page->mapping->host)->io_tree; - if (page->private == EXTENT_PAGE_PRIVATE) - goto out; - if (!page->private) - goto out; - - len = page->private >> 2; - WARN_ON(len == 0); - - eb = alloc_extent_buffer(tree, start, len, page); - if (eb == NULL) - goto out; - - if (test_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) { - clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags); + eb = (struct extent_buffer *)page->private; + set_bit(EXTENT_BUFFER_IOERR, &eb->bflags); + eb->failed_mirror = failed_mirror; + if (test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) btree_readahead_hook(root, eb, eb->start, -EIO); - } - free_extent_buffer(eb); - -out: return -EIO; /* we fixed nothing */ } @@ -719,11 +726,14 @@ unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info) static void run_one_async_start(struct btrfs_work *work) { struct async_submit_bio *async; + int ret; async = container_of(work, struct async_submit_bio, work); - async->submit_bio_start(async->inode, async->rw, async->bio, - async->mirror_num, async->bio_flags, - async->bio_offset); + ret = async->submit_bio_start(async->inode, async->rw, async->bio, + async->mirror_num, async->bio_flags, + async->bio_offset); + if (ret) + async->error = ret; } static void run_one_async_done(struct btrfs_work *work) @@ -744,6 +754,12 @@ static void run_one_async_done(struct btrfs_work *work) waitqueue_active(&fs_info->async_submit_wait)) wake_up(&fs_info->async_submit_wait); + /* If an error occured we just want to clean up the bio and move on */ + if (async->error) { + bio_endio(async->bio, async->error); + return; + } + async->submit_bio_done(async->inode, async->rw, async->bio, async->mirror_num, async->bio_flags, async->bio_offset); @@ -785,6 +801,8 @@ int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode, async->bio_flags = bio_flags; async->bio_offset = bio_offset; + async->error = 0; + atomic_inc(&fs_info->nr_async_submits); if (rw & REQ_SYNC) @@ -806,15 +824,18 @@ static int btree_csum_one_bio(struct bio *bio) struct bio_vec *bvec = bio->bi_io_vec; int bio_index = 0; struct btrfs_root *root; + int ret = 0; WARN_ON(bio->bi_vcnt <= 0); while (bio_index < bio->bi_vcnt) { root = BTRFS_I(bvec->bv_page->mapping->host)->root; - csum_dirty_buffer(root, bvec->bv_page); + ret = csum_dirty_buffer(root, bvec->bv_page); + if (ret) + break; bio_index++; bvec++; } - return 0; + return ret; } static int __btree_submit_bio_start(struct inode *inode, int rw, @@ -826,8 +847,7 @@ static int __btree_submit_bio_start(struct inode *inode, int rw, * when we're called for a write, we're already in the async * submission context. Just jump into btrfs_map_bio */ - btree_csum_one_bio(bio); - return 0; + return btree_csum_one_bio(bio); } static int __btree_submit_bio_done(struct inode *inode, int rw, struct bio *bio, @@ -847,15 +867,16 @@ static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio, { int ret; - ret = btrfs_bio_wq_end_io(BTRFS_I(inode)->root->fs_info, - bio, 1); - BUG_ON(ret); - if (!(rw & REQ_WRITE)) { + /* * called for a read, do the setup so that checksum validation * can happen in the async kernel threads */ + ret = btrfs_bio_wq_end_io(BTRFS_I(inode)->root->fs_info, + bio, 1); + if (ret) + return ret; return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, mirror_num, 0); } @@ -893,34 +914,6 @@ static int btree_migratepage(struct address_space *mapping, } #endif -static int btree_writepage(struct page *page, struct writeback_control *wbc) -{ - struct extent_io_tree *tree; - struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; - struct extent_buffer *eb; - int was_dirty; - - tree = &BTRFS_I(page->mapping->host)->io_tree; - if (!(current->flags & PF_MEMALLOC)) { - return extent_write_full_page(tree, page, - btree_get_extent, wbc); - } - - redirty_page_for_writepage(wbc, page); - eb = btrfs_find_tree_block(root, page_offset(page), PAGE_CACHE_SIZE); - WARN_ON(!eb); - - was_dirty = test_and_set_bit(EXTENT_BUFFER_DIRTY, &eb->bflags); - if (!was_dirty) { - spin_lock(&root->fs_info->delalloc_lock); - root->fs_info->dirty_metadata_bytes += PAGE_CACHE_SIZE; - spin_unlock(&root->fs_info->delalloc_lock); - } - free_extent_buffer(eb); - - unlock_page(page); - return 0; -} static int btree_writepages(struct address_space *mapping, struct writeback_control *wbc) @@ -940,7 +933,7 @@ static int btree_writepages(struct address_space *mapping, if (num_dirty < thresh) return 0; } - return extent_writepages(tree, mapping, btree_get_extent, wbc); + return btree_write_cache_pages(mapping, wbc); } static int btree_readpage(struct file *file, struct page *page) @@ -952,16 +945,8 @@ static int btree_readpage(struct file *file, struct page *page) static int btree_releasepage(struct page *page, gfp_t gfp_flags) { - struct extent_io_tree *tree; - struct extent_map_tree *map; - int ret; - if (PageWriteback(page) || PageDirty(page)) return 0; - - tree = &BTRFS_I(page->mapping->host)->io_tree; - map = &BTRFS_I(page->mapping->host)->extent_tree; - /* * We need to mask out eg. __GFP_HIGHMEM and __GFP_DMA32 as we're doing * slab allocation from alloc_extent_state down the callchain where @@ -969,18 +954,7 @@ static int btree_releasepage(struct page *page, gfp_t gfp_flags) */ gfp_flags &= ~GFP_SLAB_BUG_MASK; - ret = try_release_extent_state(map, tree, page, gfp_flags); - if (!ret) - return 0; - - ret = try_release_extent_buffer(tree, page); - if (ret == 1) { - ClearPagePrivate(page); - set_page_private(page, 0); - page_cache_release(page); - } - - return ret; + return try_release_extent_buffer(page, gfp_flags); } static void btree_invalidatepage(struct page *page, unsigned long offset) @@ -998,15 +972,28 @@ static void btree_invalidatepage(struct page *page, unsigned long offset) } } +static int btree_set_page_dirty(struct page *page) +{ + struct extent_buffer *eb; + + BUG_ON(!PagePrivate(page)); + eb = (struct extent_buffer *)page->private; + BUG_ON(!eb); + BUG_ON(!test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)); + BUG_ON(!atomic_read(&eb->refs)); + btrfs_assert_tree_locked(eb); + return __set_page_dirty_nobuffers(page); +} + static const struct address_space_operations btree_aops = { .readpage = btree_readpage, - .writepage = btree_writepage, .writepages = btree_writepages, .releasepage = btree_releasepage, .invalidatepage = btree_invalidatepage, #ifdef CONFIG_MIGRATION .migratepage = btree_migratepage, #endif + .set_page_dirty = btree_set_page_dirty, }; int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize, @@ -1049,7 +1036,7 @@ int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32 blocksize, if (test_bit(EXTENT_BUFFER_CORRUPT, &buf->bflags)) { free_extent_buffer(buf); return -EIO; - } else if (extent_buffer_uptodate(io_tree, buf, NULL)) { + } else if (extent_buffer_uptodate(buf)) { *eb = buf; } else { free_extent_buffer(buf); @@ -1074,20 +1061,20 @@ struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, struct extent_buffer *eb; eb = alloc_extent_buffer(&BTRFS_I(btree_inode)->io_tree, - bytenr, blocksize, NULL); + bytenr, blocksize); return eb; } int btrfs_write_tree_block(struct extent_buffer *buf) { - return filemap_fdatawrite_range(buf->first_page->mapping, buf->start, + return filemap_fdatawrite_range(buf->pages[0]->mapping, buf->start, buf->start + buf->len - 1); } int btrfs_wait_tree_block_writeback(struct extent_buffer *buf) { - return filemap_fdatawait_range(buf->first_page->mapping, + return filemap_fdatawait_range(buf->pages[0]->mapping, buf->start, buf->start + buf->len - 1); } @@ -1102,17 +1089,13 @@ struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr, return NULL; ret = btree_read_extent_buffer_pages(root, buf, 0, parent_transid); - - if (ret == 0) - set_bit(EXTENT_BUFFER_UPTODATE, &buf->bflags); return buf; } -int clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, - struct extent_buffer *buf) +void clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, + struct extent_buffer *buf) { - struct inode *btree_inode = root->fs_info->btree_inode; if (btrfs_header_generation(buf) == root->fs_info->running_transaction->transid) { btrfs_assert_tree_locked(buf); @@ -1121,23 +1104,27 @@ int clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, spin_lock(&root->fs_info->delalloc_lock); if (root->fs_info->dirty_metadata_bytes >= buf->len) root->fs_info->dirty_metadata_bytes -= buf->len; - else - WARN_ON(1); + else { + spin_unlock(&root->fs_info->delalloc_lock); + btrfs_panic(root->fs_info, -EOVERFLOW, + "Can't clear %lu bytes from " + " dirty_mdatadata_bytes (%lu)", + buf->len, + root->fs_info->dirty_metadata_bytes); + } spin_unlock(&root->fs_info->delalloc_lock); } /* ugh, clear_extent_buffer_dirty needs to lock the page */ btrfs_set_lock_blocking(buf); - clear_extent_buffer_dirty(&BTRFS_I(btree_inode)->io_tree, - buf); + clear_extent_buffer_dirty(buf); } - return 0; } -static int __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize, - u32 stripesize, struct btrfs_root *root, - struct btrfs_fs_info *fs_info, - u64 objectid) +static void __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize, + u32 stripesize, struct btrfs_root *root, + struct btrfs_fs_info *fs_info, + u64 objectid) { root->node = NULL; root->commit_root = NULL; @@ -1189,13 +1176,12 @@ static int __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize, root->defrag_running = 0; root->root_key.objectid = objectid; root->anon_dev = 0; - return 0; } -static int find_and_setup_root(struct btrfs_root *tree_root, - struct btrfs_fs_info *fs_info, - u64 objectid, - struct btrfs_root *root) +static int __must_check find_and_setup_root(struct btrfs_root *tree_root, + struct btrfs_fs_info *fs_info, + u64 objectid, + struct btrfs_root *root) { int ret; u32 blocksize; @@ -1208,7 +1194,8 @@ static int find_and_setup_root(struct btrfs_root *tree_root, &root->root_item, &root->root_key); if (ret > 0) return -ENOENT; - BUG_ON(ret); + else if (ret < 0) + return ret; generation = btrfs_root_generation(&root->root_item); blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); @@ -1377,7 +1364,7 @@ struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_root *tree_root, root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), blocksize, generation); root->commit_root = btrfs_root_node(root); - BUG_ON(!root->node); + BUG_ON(!root->node); /* -ENOMEM */ out: if (location->objectid != BTRFS_TREE_LOG_OBJECTID) { root->ref_cows = 1; @@ -1513,41 +1500,6 @@ static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi) return 0; } -static int bio_ready_for_csum(struct bio *bio) -{ - u64 length = 0; - u64 buf_len = 0; - u64 start = 0; - struct page *page; - struct extent_io_tree *io_tree = NULL; - struct bio_vec *bvec; - int i; - int ret; - - bio_for_each_segment(bvec, bio, i) { - page = bvec->bv_page; - if (page->private == EXTENT_PAGE_PRIVATE) { - length += bvec->bv_len; - continue; - } - if (!page->private) { - length += bvec->bv_len; - continue; - } - length = bvec->bv_len; - buf_len = page->private >> 2; - start = page_offset(page) + bvec->bv_offset; - io_tree = &BTRFS_I(page->mapping->host)->io_tree; - } - /* are we fully contained in this bio? */ - if (buf_len <= length) - return 1; - - ret = extent_range_uptodate(io_tree, start + length, - start + buf_len - 1); - return ret; -} - /* * called by the kthread helper functions to finally call the bio end_io * functions. This is where read checksum verification actually happens @@ -1563,17 +1515,6 @@ static void end_workqueue_fn(struct btrfs_work *work) bio = end_io_wq->bio; fs_info = end_io_wq->info; - /* metadata bio reads are special because the whole tree block must - * be checksummed at once. This makes sure the entire block is in - * ram and up to date before trying to verify things. For - * blocksize <= pagesize, it is basically a noop - */ - if (!(bio->bi_rw & REQ_WRITE) && end_io_wq->metadata && - !bio_ready_for_csum(bio)) { - btrfs_queue_worker(&fs_info->endio_meta_workers, - &end_io_wq->work); - return; - } error = end_io_wq->error; bio->bi_private = end_io_wq->private; bio->bi_end_io = end_io_wq->end_io; @@ -1614,9 +1555,10 @@ static int transaction_kthread(void *arg) u64 transid; unsigned long now; unsigned long delay; - int ret; + bool cannot_commit; do { + cannot_commit = false; delay = HZ * 30; vfs_check_frozen(root->fs_info->sb, SB_FREEZE_WRITE); mutex_lock(&root->fs_info->transaction_kthread_mutex); @@ -1638,11 +1580,14 @@ static int transaction_kthread(void *arg) transid = cur->transid; spin_unlock(&root->fs_info->trans_lock); + /* If the file system is aborted, this will always fail. */ trans = btrfs_join_transaction(root); - BUG_ON(IS_ERR(trans)); + if (IS_ERR(trans)) { + cannot_commit = true; + goto sleep; + } if (transid == trans->transid) { - ret = btrfs_commit_transaction(trans, root); - BUG_ON(ret); + btrfs_commit_transaction(trans, root); } else { btrfs_end_transaction(trans, root); } @@ -1653,7 +1598,8 @@ sleep: if (!try_to_freeze()) { set_current_state(TASK_INTERRUPTIBLE); if (!kthread_should_stop() && - !btrfs_transaction_blocked(root->fs_info)) + (!btrfs_transaction_blocked(root->fs_info) || + cannot_commit)) schedule_timeout(delay); __set_current_state(TASK_RUNNING); } @@ -2042,6 +1988,7 @@ int open_ctree(struct super_block *sb, RB_CLEAR_NODE(&BTRFS_I(fs_info->btree_inode)->rb_node); extent_io_tree_init(&BTRFS_I(fs_info->btree_inode)->io_tree, fs_info->btree_inode->i_mapping); + BTRFS_I(fs_info->btree_inode)->io_tree.track_uptodate = 0; extent_map_tree_init(&BTRFS_I(fs_info->btree_inode)->extent_tree); BTRFS_I(fs_info->btree_inode)->io_tree.ops = &btree_extent_io_ops; @@ -2084,6 +2031,7 @@ int open_ctree(struct super_block *sb, __setup_root(4096, 4096, 4096, 4096, tree_root, fs_info, BTRFS_ROOT_TREE_OBJECTID); + invalidate_bdev(fs_devices->latest_bdev); bh = btrfs_read_dev_super(fs_devices->latest_bdev); if (!bh) { err = -EINVAL; @@ -2104,7 +2052,12 @@ int open_ctree(struct super_block *sb, /* check FS state, whether FS is broken. */ fs_info->fs_state |= btrfs_super_flags(disk_super); - btrfs_check_super_valid(fs_info, sb->s_flags & MS_RDONLY); + ret = btrfs_check_super_valid(fs_info, sb->s_flags & MS_RDONLY); + if (ret) { + printk(KERN_ERR "btrfs: superblock contains fatal errors\n"); + err = ret; + goto fail_alloc; + } /* * run through our array of backup supers and setup @@ -2135,10 +2088,55 @@ int open_ctree(struct super_block *sb, goto fail_alloc; } + if (btrfs_super_leafsize(disk_super) != + btrfs_super_nodesize(disk_super)) { + printk(KERN_ERR "BTRFS: couldn't mount because metadata " + "blocksizes don't match. node %d leaf %d\n", + btrfs_super_nodesize(disk_super), + btrfs_super_leafsize(disk_super)); + err = -EINVAL; + goto fail_alloc; + } + if (btrfs_super_leafsize(disk_super) > BTRFS_MAX_METADATA_BLOCKSIZE) { + printk(KERN_ERR "BTRFS: couldn't mount because metadata " + "blocksize (%d) was too large\n", + btrfs_super_leafsize(disk_super)); + err = -EINVAL; + goto fail_alloc; + } + features = btrfs_super_incompat_flags(disk_super); features |= BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF; if (tree_root->fs_info->compress_type & BTRFS_COMPRESS_LZO) features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO; + + /* + * flag our filesystem as having big metadata blocks if + * they are bigger than the page size + */ + if (btrfs_super_leafsize(disk_super) > PAGE_CACHE_SIZE) { + if (!(features & BTRFS_FEATURE_INCOMPAT_BIG_METADATA)) + printk(KERN_INFO "btrfs flagging fs with big metadata feature\n"); + features |= BTRFS_FEATURE_INCOMPAT_BIG_METADATA; + } + + nodesize = btrfs_super_nodesize(disk_super); + leafsize = btrfs_super_leafsize(disk_super); + sectorsize = btrfs_super_sectorsize(disk_super); + stripesize = btrfs_super_stripesize(disk_super); + + /* + * mixed block groups end up with duplicate but slightly offset + * extent buffers for the same range. It leads to corruptions + */ + if ((features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) && + (sectorsize != leafsize)) { + printk(KERN_WARNING "btrfs: unequal leaf/node/sector sizes " + "are not allowed for mixed block groups on %s\n", + sb->s_id); + goto fail_alloc; + } + btrfs_set_super_incompat_flags(disk_super, features); features = btrfs_super_compat_ro_flags(disk_super) & @@ -2242,10 +2240,6 @@ int open_ctree(struct super_block *sb, fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages, 4 * 1024 * 1024 / PAGE_CACHE_SIZE); - nodesize = btrfs_super_nodesize(disk_super); - leafsize = btrfs_super_leafsize(disk_super); - sectorsize = btrfs_super_sectorsize(disk_super); - stripesize = btrfs_super_stripesize(disk_super); tree_root->nodesize = nodesize; tree_root->leafsize = leafsize; tree_root->sectorsize = sectorsize; @@ -2260,6 +2254,12 @@ int open_ctree(struct super_block *sb, goto fail_sb_buffer; } + if (sectorsize < PAGE_SIZE) { + printk(KERN_WARNING "btrfs: Incompatible sector size " + "found on %s\n", sb->s_id); + goto fail_sb_buffer; + } + mutex_lock(&fs_info->chunk_mutex); ret = btrfs_read_sys_array(tree_root); mutex_unlock(&fs_info->chunk_mutex); @@ -2279,7 +2279,7 @@ int open_ctree(struct super_block *sb, chunk_root->node = read_tree_block(chunk_root, btrfs_super_chunk_root(disk_super), blocksize, generation); - BUG_ON(!chunk_root->node); + BUG_ON(!chunk_root->node); /* -ENOMEM */ if (!test_bit(EXTENT_BUFFER_UPTODATE, &chunk_root->node->bflags)) { printk(KERN_WARNING "btrfs: failed to read chunk root on %s\n", sb->s_id); @@ -2301,6 +2301,12 @@ int open_ctree(struct super_block *sb, btrfs_close_extra_devices(fs_devices); + if (!fs_devices->latest_bdev) { + printk(KERN_CRIT "btrfs: failed to read devices on %s\n", + sb->s_id); + goto fail_tree_roots; + } + retry_root_backup: blocksize = btrfs_level_size(tree_root, btrfs_super_root_level(disk_super)); @@ -2413,21 +2419,31 @@ retry_root_backup: log_tree_root->node = read_tree_block(tree_root, bytenr, blocksize, generation + 1); + /* returns with log_tree_root freed on success */ ret = btrfs_recover_log_trees(log_tree_root); - BUG_ON(ret); + if (ret) { + btrfs_error(tree_root->fs_info, ret, + "Failed to recover log tree"); + free_extent_buffer(log_tree_root->node); + kfree(log_tree_root); + goto fail_trans_kthread; + } if (sb->s_flags & MS_RDONLY) { - ret = btrfs_commit_super(tree_root); - BUG_ON(ret); + ret = btrfs_commit_super(tree_root); + if (ret) + goto fail_trans_kthread; } } ret = btrfs_find_orphan_roots(tree_root); - BUG_ON(ret); + if (ret) + goto fail_trans_kthread; if (!(sb->s_flags & MS_RDONLY)) { ret = btrfs_cleanup_fs_roots(fs_info); - BUG_ON(ret); + if (ret) { + } ret = btrfs_recover_relocation(tree_root); if (ret < 0) { @@ -2847,6 +2863,8 @@ int write_all_supers(struct btrfs_root *root, int max_mirrors) if (total_errors > max_errors) { printk(KERN_ERR "btrfs: %d errors while writing supers\n", total_errors); + + /* This shouldn't happen. FUA is masked off if unsupported */ BUG(); } @@ -2863,9 +2881,9 @@ int write_all_supers(struct btrfs_root *root, int max_mirrors) } mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); if (total_errors > max_errors) { - printk(KERN_ERR "btrfs: %d errors while writing supers\n", - total_errors); - BUG(); + btrfs_error(root->fs_info, -EIO, + "%d errors while writing supers", total_errors); + return -EIO; } return 0; } @@ -2879,7 +2897,20 @@ int write_ctree_super(struct btrfs_trans_handle *trans, return ret; } -int btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root) +/* Kill all outstanding I/O */ +void btrfs_abort_devices(struct btrfs_root *root) +{ + struct list_head *head; + struct btrfs_device *dev; + mutex_lock(&root->fs_info->fs_devices->device_list_mutex); + head = &root->fs_info->fs_devices->devices; + list_for_each_entry_rcu(dev, head, dev_list) { + blk_abort_queue(dev->bdev->bd_disk->queue); + } + mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); +} + +void btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root) { spin_lock(&fs_info->fs_roots_radix_lock); radix_tree_delete(&fs_info->fs_roots_radix, @@ -2892,7 +2923,6 @@ int btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root) __btrfs_remove_free_space_cache(root->free_ino_pinned); __btrfs_remove_free_space_cache(root->free_ino_ctl); free_fs_root(root); - return 0; } static void free_fs_root(struct btrfs_root *root) @@ -2909,7 +2939,7 @@ static void free_fs_root(struct btrfs_root *root) kfree(root); } -static int del_fs_roots(struct btrfs_fs_info *fs_info) +static void del_fs_roots(struct btrfs_fs_info *fs_info) { int ret; struct btrfs_root *gang[8]; @@ -2938,7 +2968,6 @@ static int del_fs_roots(struct btrfs_fs_info *fs_info) for (i = 0; i < ret; i++) btrfs_free_fs_root(fs_info, gang[i]); } - return 0; } int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info) @@ -2987,14 +3016,21 @@ int btrfs_commit_super(struct btrfs_root *root) if (IS_ERR(trans)) return PTR_ERR(trans); ret = btrfs_commit_transaction(trans, root); - BUG_ON(ret); + if (ret) + return ret; /* run commit again to drop the original snapshot */ trans = btrfs_join_transaction(root); if (IS_ERR(trans)) return PTR_ERR(trans); - btrfs_commit_transaction(trans, root); + ret = btrfs_commit_transaction(trans, root); + if (ret) + return ret; ret = btrfs_write_and_wait_transaction(NULL, root); - BUG_ON(ret); + if (ret) { + btrfs_error(root->fs_info, ret, + "Failed to sync btree inode to disk."); + return ret; + } ret = write_ctree_super(NULL, root, 0); return ret; @@ -3110,10 +3146,9 @@ int close_ctree(struct btrfs_root *root) int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid) { int ret; - struct inode *btree_inode = buf->first_page->mapping->host; + struct inode *btree_inode = buf->pages[0]->mapping->host; - ret = extent_buffer_uptodate(&BTRFS_I(btree_inode)->io_tree, buf, - NULL); + ret = extent_buffer_uptodate(buf); if (!ret) return ret; @@ -3124,16 +3159,13 @@ int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid) int btrfs_set_buffer_uptodate(struct extent_buffer *buf) { - struct inode *btree_inode = buf->first_page->mapping->host; - return set_extent_buffer_uptodate(&BTRFS_I(btree_inode)->io_tree, - buf); + return set_extent_buffer_uptodate(buf); } void btrfs_mark_buffer_dirty(struct extent_buffer *buf) { - struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root; + struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root; u64 transid = btrfs_header_generation(buf); - struct inode *btree_inode = root->fs_info->btree_inode; int was_dirty; btrfs_assert_tree_locked(buf); @@ -3145,8 +3177,7 @@ void btrfs_mark_buffer_dirty(struct extent_buffer *buf) (unsigned long long)root->fs_info->generation); WARN_ON(1); } - was_dirty = set_extent_buffer_dirty(&BTRFS_I(btree_inode)->io_tree, - buf); + was_dirty = set_extent_buffer_dirty(buf); if (!was_dirty) { spin_lock(&root->fs_info->delalloc_lock); root->fs_info->dirty_metadata_bytes += buf->len; @@ -3200,12 +3231,8 @@ void __btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr) int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid) { - struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root; - int ret; - ret = btree_read_extent_buffer_pages(root, buf, 0, parent_transid); - if (ret == 0) - set_bit(EXTENT_BUFFER_UPTODATE, &buf->bflags); - return ret; + struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root; + return btree_read_extent_buffer_pages(root, buf, 0, parent_transid); } static int btree_lock_page_hook(struct page *page, void *data, @@ -3213,17 +3240,21 @@ static int btree_lock_page_hook(struct page *page, void *data, { struct inode *inode = page->mapping->host; struct btrfs_root *root = BTRFS_I(inode)->root; - struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree; struct extent_buffer *eb; - unsigned long len; - u64 bytenr = page_offset(page); - if (page->private == EXTENT_PAGE_PRIVATE) + /* + * We culled this eb but the page is still hanging out on the mapping, + * carry on. + */ + if (!PagePrivate(page)) goto out; - len = page->private >> 2; - eb = find_extent_buffer(io_tree, bytenr, len); - if (!eb) + eb = (struct extent_buffer *)page->private; + if (!eb) { + WARN_ON(1); + goto out; + } + if (page != eb->pages[0]) goto out; if (!btrfs_try_tree_write_lock(eb)) { @@ -3242,7 +3273,6 @@ static int btree_lock_page_hook(struct page *page, void *data, } btrfs_tree_unlock(eb); - free_extent_buffer(eb); out: if (!trylock_page(page)) { flush_fn(data); @@ -3251,15 +3281,23 @@ out: return 0; } -static void btrfs_check_super_valid(struct btrfs_fs_info *fs_info, +static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, int read_only) { + if (btrfs_super_csum_type(fs_info->super_copy) >= ARRAY_SIZE(btrfs_csum_sizes)) { + printk(KERN_ERR "btrfs: unsupported checksum algorithm\n"); + return -EINVAL; + } + if (read_only) - return; + return 0; - if (fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) + if (fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) { printk(KERN_WARNING "warning: mount fs with errors, " "running btrfsck is recommended\n"); + } + + return 0; } int btrfs_error_commit_super(struct btrfs_root *root) @@ -3281,7 +3319,7 @@ int btrfs_error_commit_super(struct btrfs_root *root) return ret; } -static int btrfs_destroy_ordered_operations(struct btrfs_root *root) +static void btrfs_destroy_ordered_operations(struct btrfs_root *root) { struct btrfs_inode *btrfs_inode; struct list_head splice; @@ -3303,11 +3341,9 @@ static int btrfs_destroy_ordered_operations(struct btrfs_root *root) spin_unlock(&root->fs_info->ordered_extent_lock); mutex_unlock(&root->fs_info->ordered_operations_mutex); - - return 0; } -static int btrfs_destroy_ordered_extents(struct btrfs_root *root) +static void btrfs_destroy_ordered_extents(struct btrfs_root *root) { struct list_head splice; struct btrfs_ordered_extent *ordered; @@ -3339,12 +3375,10 @@ static int btrfs_destroy_ordered_extents(struct btrfs_root *root) } spin_unlock(&root->fs_info->ordered_extent_lock); - - return 0; } -static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, - struct btrfs_root *root) +int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, + struct btrfs_root *root) { struct rb_node *node; struct btrfs_delayed_ref_root *delayed_refs; @@ -3353,6 +3387,7 @@ static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, delayed_refs = &trans->delayed_refs; +again: spin_lock(&delayed_refs->lock); if (delayed_refs->num_entries == 0) { spin_unlock(&delayed_refs->lock); @@ -3374,6 +3409,7 @@ static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, struct btrfs_delayed_ref_head *head; head = btrfs_delayed_node_to_head(ref); + spin_unlock(&delayed_refs->lock); mutex_lock(&head->mutex); kfree(head->extent_op); delayed_refs->num_heads--; @@ -3381,8 +3417,9 @@ static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, delayed_refs->num_heads_ready--; list_del_init(&head->cluster); mutex_unlock(&head->mutex); + btrfs_put_delayed_ref(ref); + goto again; } - spin_unlock(&delayed_refs->lock); btrfs_put_delayed_ref(ref); @@ -3395,7 +3432,7 @@ static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, return ret; } -static int btrfs_destroy_pending_snapshots(struct btrfs_transaction *t) +static void btrfs_destroy_pending_snapshots(struct btrfs_transaction *t) { struct btrfs_pending_snapshot *snapshot; struct list_head splice; @@ -3413,11 +3450,9 @@ static int btrfs_destroy_pending_snapshots(struct btrfs_transaction *t) kfree(snapshot); } - - return 0; } -static int btrfs_destroy_delalloc_inodes(struct btrfs_root *root) +static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root) { struct btrfs_inode *btrfs_inode; struct list_head splice; @@ -3437,8 +3472,6 @@ static int btrfs_destroy_delalloc_inodes(struct btrfs_root *root) } spin_unlock(&root->fs_info->delalloc_lock); - - return 0; } static int btrfs_destroy_marked_extents(struct btrfs_root *root, @@ -3529,13 +3562,43 @@ static int btrfs_destroy_pinned_extent(struct btrfs_root *root, return 0; } -static int btrfs_cleanup_transaction(struct btrfs_root *root) +void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans, + struct btrfs_root *root) +{ + btrfs_destroy_delayed_refs(cur_trans, root); + btrfs_block_rsv_release(root, &root->fs_info->trans_block_rsv, + cur_trans->dirty_pages.dirty_bytes); + + /* FIXME: cleanup wait for commit */ + cur_trans->in_commit = 1; + cur_trans->blocked = 1; + if (waitqueue_active(&root->fs_info->transaction_blocked_wait)) + wake_up(&root->fs_info->transaction_blocked_wait); + + cur_trans->blocked = 0; + if (waitqueue_active(&root->fs_info->transaction_wait)) + wake_up(&root->fs_info->transaction_wait); + + cur_trans->commit_done = 1; + if (waitqueue_active(&cur_trans->commit_wait)) + wake_up(&cur_trans->commit_wait); + + btrfs_destroy_pending_snapshots(cur_trans); + + btrfs_destroy_marked_extents(root, &cur_trans->dirty_pages, + EXTENT_DIRTY); + + /* + memset(cur_trans, 0, sizeof(*cur_trans)); + kmem_cache_free(btrfs_transaction_cachep, cur_trans); + */ +} + +int btrfs_cleanup_transaction(struct btrfs_root *root) { struct btrfs_transaction *t; LIST_HEAD(list); - WARN_ON(1); - mutex_lock(&root->fs_info->transaction_kthread_mutex); spin_lock(&root->fs_info->trans_lock); @@ -3600,6 +3663,17 @@ static int btrfs_cleanup_transaction(struct btrfs_root *root) return 0; } +static int btree_writepage_io_failed_hook(struct bio *bio, struct page *page, + u64 start, u64 end, + struct extent_state *state) +{ + struct super_block *sb = page->mapping->host->i_sb; + struct btrfs_fs_info *fs_info = btrfs_sb(sb); + btrfs_error(fs_info, -EIO, + "Error occured while writing out btree at %llu", start); + return -EIO; +} + static struct extent_io_ops btree_extent_io_ops = { .write_cache_pages_lock_hook = btree_lock_page_hook, .readpage_end_io_hook = btree_readpage_end_io_hook, @@ -3607,4 +3681,5 @@ static struct extent_io_ops btree_extent_io_ops = { .submit_bio_hook = btree_submit_bio_hook, /* note we're sharing with inode.c for the merge bio hook */ .merge_bio_hook = btrfs_merge_bio_hook, + .writepage_io_failed_hook = btree_writepage_io_failed_hook, }; diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h index e4bc474..a7ace1a 100644 --- a/fs/btrfs/disk-io.h +++ b/fs/btrfs/disk-io.h @@ -44,8 +44,8 @@ int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32 blocksize, int mirror_num, struct extent_buffer **eb); struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize); -int clean_tree_block(struct btrfs_trans_handle *trans, - struct btrfs_root *root, struct extent_buffer *buf); +void clean_tree_block(struct btrfs_trans_handle *trans, + struct btrfs_root *root, struct extent_buffer *buf); int open_ctree(struct super_block *sb, struct btrfs_fs_devices *fs_devices, char *options); @@ -64,7 +64,7 @@ struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info, int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info); void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr); void __btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr); -int btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root); +void btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root); void btrfs_mark_buffer_dirty(struct extent_buffer *buf); int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid); int btrfs_set_buffer_uptodate(struct extent_buffer *buf); @@ -85,6 +85,10 @@ int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, struct btrfs_fs_info *fs_info); int btrfs_add_log_tree(struct btrfs_trans_handle *trans, struct btrfs_root *root); +int btrfs_cleanup_transaction(struct btrfs_root *root); +void btrfs_cleanup_one_transaction(struct btrfs_transaction *trans, + struct btrfs_root *root); +void btrfs_abort_devices(struct btrfs_root *root); #ifdef CONFIG_DEBUG_LOCK_ALLOC void btrfs_init_lockdep(void); diff --git a/fs/btrfs/export.c b/fs/btrfs/export.c index 5f77166..e887ee6 100644 --- a/fs/btrfs/export.c +++ b/fs/btrfs/export.c @@ -193,7 +193,7 @@ static struct dentry *btrfs_get_parent(struct dentry *child) if (ret < 0) goto fail; - BUG_ON(ret == 0); + BUG_ON(ret == 0); /* Key with offset of -1 found */ if (path->slots[0] == 0) { ret = -ENOENT; goto fail; diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 283af7a..a844204 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -245,7 +245,7 @@ static int exclude_super_stripes(struct btrfs_root *root, cache->bytes_super += stripe_len; ret = add_excluded_extent(root, cache->key.objectid, stripe_len); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ } for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) { @@ -253,13 +253,13 @@ static int exclude_super_stripes(struct btrfs_root *root, ret = btrfs_rmap_block(&root->fs_info->mapping_tree, cache->key.objectid, bytenr, 0, &logical, &nr, &stripe_len); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ while (nr--) { cache->bytes_super += stripe_len; ret = add_excluded_extent(root, logical[nr], stripe_len); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ } kfree(logical); @@ -321,7 +321,7 @@ static u64 add_new_free_space(struct btrfs_block_group_cache *block_group, total_added += size; ret = btrfs_add_free_space(block_group, start, size); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM or logic error */ start = extent_end + 1; } else { break; @@ -332,7 +332,7 @@ static u64 add_new_free_space(struct btrfs_block_group_cache *block_group, size = end - start; total_added += size; ret = btrfs_add_free_space(block_group, start, size); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM or logic error */ } return total_added; @@ -474,7 +474,8 @@ static int cache_block_group(struct btrfs_block_group_cache *cache, int ret = 0; caching_ctl = kzalloc(sizeof(*caching_ctl), GFP_NOFS); - BUG_ON(!caching_ctl); + if (!caching_ctl) + return -ENOMEM; INIT_LIST_HEAD(&caching_ctl->list); mutex_init(&caching_ctl->mutex); @@ -982,7 +983,7 @@ static int convert_extent_item_v0(struct btrfs_trans_handle *trans, ret = btrfs_next_leaf(root, path); if (ret < 0) return ret; - BUG_ON(ret > 0); + BUG_ON(ret > 0); /* Corruption */ leaf = path->nodes[0]; } btrfs_item_key_to_cpu(leaf, &found_key, @@ -1008,9 +1009,9 @@ static int convert_extent_item_v0(struct btrfs_trans_handle *trans, new_size + extra_size, 1); if (ret < 0) return ret; - BUG_ON(ret); + BUG_ON(ret); /* Corruption */ - ret = btrfs_extend_item(trans, root, path, new_size); + btrfs_extend_item(trans, root, path, new_size); leaf = path->nodes[0]; item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_extent_item); @@ -1478,7 +1479,11 @@ int lookup_inline_extent_backref(struct btrfs_trans_handle *trans, err = ret; goto out; } - BUG_ON(ret); + if (ret && !insert) { + err = -ENOENT; + goto out; + } + BUG_ON(ret); /* Corruption */ leaf = path->nodes[0]; item_size = btrfs_item_size_nr(leaf, path->slots[0]); @@ -1592,13 +1597,13 @@ out: * helper to add new inline back ref */ static noinline_for_stack -int setup_inline_extent_backref(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - struct btrfs_path *path, - struct btrfs_extent_inline_ref *iref, - u64 parent, u64 root_objectid, - u64 owner, u64 offset, int refs_to_add, - struct btrfs_delayed_extent_op *extent_op) +void setup_inline_extent_backref(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct btrfs_path *path, + struct btrfs_extent_inline_ref *iref, + u64 parent, u64 root_objectid, + u64 owner, u64 offset, int refs_to_add, + struct btrfs_delayed_extent_op *extent_op) { struct extent_buffer *leaf; struct btrfs_extent_item *ei; @@ -1608,7 +1613,6 @@ int setup_inline_extent_backref(struct btrfs_trans_handle *trans, u64 refs; int size; int type; - int ret; leaf = path->nodes[0]; ei = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_extent_item); @@ -1617,7 +1621,7 @@ int setup_inline_extent_backref(struct btrfs_trans_handle *trans, type = extent_ref_type(parent, owner); size = btrfs_extent_inline_ref_size(type); - ret = btrfs_extend_item(trans, root, path, size); + btrfs_extend_item(trans, root, path, size); ei = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_extent_item); refs = btrfs_extent_refs(leaf, ei); @@ -1652,7 +1656,6 @@ int setup_inline_extent_backref(struct btrfs_trans_handle *trans, btrfs_set_extent_inline_ref_offset(leaf, iref, root_objectid); } btrfs_mark_buffer_dirty(leaf); - return 0; } static int lookup_extent_backref(struct btrfs_trans_handle *trans, @@ -1687,12 +1690,12 @@ static int lookup_extent_backref(struct btrfs_trans_handle *trans, * helper to update/remove inline back ref */ static noinline_for_stack -int update_inline_extent_backref(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - struct btrfs_path *path, - struct btrfs_extent_inline_ref *iref, - int refs_to_mod, - struct btrfs_delayed_extent_op *extent_op) +void update_inline_extent_backref(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct btrfs_path *path, + struct btrfs_extent_inline_ref *iref, + int refs_to_mod, + struct btrfs_delayed_extent_op *extent_op) { struct extent_buffer *leaf; struct btrfs_extent_item *ei; @@ -1703,7 +1706,6 @@ int update_inline_extent_backref(struct btrfs_trans_handle *trans, u32 item_size; int size; int type; - int ret; u64 refs; leaf = path->nodes[0]; @@ -1745,10 +1747,9 @@ int update_inline_extent_backref(struct btrfs_trans_handle *trans, memmove_extent_buffer(leaf, ptr, ptr + size, end - ptr - size); item_size -= size; - ret = btrfs_truncate_item(trans, root, path, item_size, 1); + btrfs_truncate_item(trans, root, path, item_size, 1); } btrfs_mark_buffer_dirty(leaf); - return 0; } static noinline_for_stack @@ -1768,13 +1769,13 @@ int insert_inline_extent_backref(struct btrfs_trans_handle *trans, root_objectid, owner, offset, 1); if (ret == 0) { BUG_ON(owner < BTRFS_FIRST_FREE_OBJECTID); - ret = update_inline_extent_backref(trans, root, path, iref, - refs_to_add, extent_op); + update_inline_extent_backref(trans, root, path, iref, + refs_to_add, extent_op); } else if (ret == -ENOENT) { - ret = setup_inline_extent_backref(trans, root, path, iref, - parent, root_objectid, - owner, offset, refs_to_add, - extent_op); + setup_inline_extent_backref(trans, root, path, iref, parent, + root_objectid, owner, offset, + refs_to_add, extent_op); + ret = 0; } return ret; } @@ -1804,12 +1805,12 @@ static int remove_extent_backref(struct btrfs_trans_handle *trans, struct btrfs_extent_inline_ref *iref, int refs_to_drop, int is_data) { - int ret; + int ret = 0; BUG_ON(!is_data && refs_to_drop != 1); if (iref) { - ret = update_inline_extent_backref(trans, root, path, iref, - -refs_to_drop, NULL); + update_inline_extent_backref(trans, root, path, iref, + -refs_to_drop, NULL); } else if (is_data) { ret = remove_extent_data_ref(trans, root, path, refs_to_drop); } else { @@ -1835,6 +1836,7 @@ static int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr, /* Tell the block device(s) that the sectors can be discarded */ ret = btrfs_map_block(&root->fs_info->mapping_tree, REQ_DISCARD, bytenr, &num_bytes, &bbio, 0); + /* Error condition is -ENOMEM */ if (!ret) { struct btrfs_bio_stripe *stripe = bbio->stripes; int i; @@ -1850,7 +1852,7 @@ static int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr, if (!ret) discarded_bytes += stripe->length; else if (ret != -EOPNOTSUPP) - break; + break; /* Logic errors or -ENOMEM, or -EIO but I don't know how that could happen JDM */ /* * Just in case we get back EOPNOTSUPP for some reason, @@ -1869,6 +1871,7 @@ static int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr, return ret; } +/* Can return -ENOMEM */ int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, u64 bytenr, u64 num_bytes, u64 parent, @@ -1944,7 +1947,8 @@ static int __btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, ret = insert_extent_backref(trans, root->fs_info->extent_root, path, bytenr, parent, root_objectid, owner, offset, refs_to_add); - BUG_ON(ret); + if (ret) + btrfs_abort_transaction(trans, root, ret); out: btrfs_free_path(path); return err; @@ -2031,6 +2035,9 @@ static int run_delayed_extent_op(struct btrfs_trans_handle *trans, int ret; int err = 0; + if (trans->aborted) + return 0; + path = btrfs_alloc_path(); if (!path) return -ENOMEM; @@ -2128,7 +2135,11 @@ static int run_one_delayed_ref(struct btrfs_trans_handle *trans, struct btrfs_delayed_extent_op *extent_op, int insert_reserved) { - int ret; + int ret = 0; + + if (trans->aborted) + return 0; + if (btrfs_delayed_ref_is_head(node)) { struct btrfs_delayed_ref_head *head; /* @@ -2146,11 +2157,10 @@ static int run_one_delayed_ref(struct btrfs_trans_handle *trans, ret = btrfs_del_csums(trans, root, node->bytenr, node->num_bytes); - BUG_ON(ret); } } mutex_unlock(&head->mutex); - return 0; + return ret; } if (node->type == BTRFS_TREE_BLOCK_REF_KEY || @@ -2197,6 +2207,10 @@ again: return NULL; } +/* + * Returns 0 on success or if called with an already aborted transaction. + * Returns -ENOMEM or -EIO on failure and will abort the transaction. + */ static noinline int run_clustered_refs(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct list_head *cluster) @@ -2285,9 +2299,13 @@ static noinline int run_clustered_refs(struct btrfs_trans_handle *trans, ret = run_delayed_extent_op(trans, root, ref, extent_op); - BUG_ON(ret); kfree(extent_op); + if (ret) { + printk(KERN_DEBUG "btrfs: run_delayed_extent_op returned %d\n", ret); + return ret; + } + goto next; } @@ -2308,11 +2326,16 @@ static noinline int run_clustered_refs(struct btrfs_trans_handle *trans, ret = run_one_delayed_ref(trans, root, ref, extent_op, must_insert_reserved); - BUG_ON(ret); btrfs_put_delayed_ref(ref); kfree(extent_op); count++; + + if (ret) { + printk(KERN_DEBUG "btrfs: run_one_delayed_ref returned %d\n", ret); + return ret; + } + next: do_chunk_alloc(trans, root->fs_info->extent_root, 2 * 1024 * 1024, @@ -2347,6 +2370,9 @@ static void wait_for_more_refs(struct btrfs_delayed_ref_root *delayed_refs, * 0, which means to process everything in the tree at the start * of the run (but not newly added entries), or it can be some target * number you'd like to process. + * + * Returns 0 on success or if called with an aborted transaction + * Returns <0 on error and aborts the transaction */ int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, struct btrfs_root *root, unsigned long count) @@ -2362,6 +2388,10 @@ int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, unsigned long num_refs = 0; int consider_waiting; + /* We'll clean this up in btrfs_cleanup_transaction */ + if (trans->aborted) + return 0; + if (root == root->fs_info->extent_root) root = root->fs_info->tree_root; @@ -2419,7 +2449,11 @@ again: } ret = run_clustered_refs(trans, root, &cluster); - BUG_ON(ret < 0); + if (ret < 0) { + spin_unlock(&delayed_refs->lock); + btrfs_abort_transaction(trans, root, ret); + return ret; + } count -= min_t(unsigned long, ret, count); @@ -2584,7 +2618,7 @@ static noinline int check_committed_ref(struct btrfs_trans_handle *trans, ret = btrfs_search_slot(NULL, extent_root, &key, path, 0, 0); if (ret < 0) goto out; - BUG_ON(ret == 0); + BUG_ON(ret == 0); /* Corruption */ ret = -ENOENT; if (path->slots[0] == 0) @@ -2738,7 +2772,6 @@ static int __btrfs_mod_ref(struct btrfs_trans_handle *trans, } return 0; fail: - BUG(); return ret; } @@ -2767,7 +2800,7 @@ static int write_one_cache_group(struct btrfs_trans_handle *trans, ret = btrfs_search_slot(trans, extent_root, &cache->key, path, 0, 1); if (ret < 0) goto fail; - BUG_ON(ret); + BUG_ON(ret); /* Corruption */ leaf = path->nodes[0]; bi = btrfs_item_ptr_offset(leaf, path->slots[0]); @@ -2775,8 +2808,10 @@ static int write_one_cache_group(struct btrfs_trans_handle *trans, btrfs_mark_buffer_dirty(leaf); btrfs_release_path(path); fail: - if (ret) + if (ret) { + btrfs_abort_transaction(trans, root, ret); return ret; + } return 0; } @@ -2949,7 +2984,8 @@ again: if (last == 0) { err = btrfs_run_delayed_refs(trans, root, (unsigned long)-1); - BUG_ON(err); + if (err) /* File system offline */ + goto out; } cache = btrfs_lookup_first_block_group(root->fs_info, last); @@ -2976,7 +3012,9 @@ again: last = cache->key.objectid + cache->key.offset; err = write_one_cache_group(trans, root, path, cache); - BUG_ON(err); + if (err) /* File system offline */ + goto out; + btrfs_put_block_group(cache); } @@ -2989,7 +3027,8 @@ again: if (last == 0) { err = btrfs_run_delayed_refs(trans, root, (unsigned long)-1); - BUG_ON(err); + if (err) /* File system offline */ + goto out; } cache = btrfs_lookup_first_block_group(root->fs_info, last); @@ -3014,20 +3053,21 @@ again: continue; } - btrfs_write_out_cache(root, trans, cache, path); + err = btrfs_write_out_cache(root, trans, cache, path); /* * If we didn't have an error then the cache state is still * NEED_WRITE, so we can set it to WRITTEN. */ - if (cache->disk_cache_state == BTRFS_DC_NEED_WRITE) + if (!err && cache->disk_cache_state == BTRFS_DC_NEED_WRITE) cache->disk_cache_state = BTRFS_DC_WRITTEN; last = cache->key.objectid + cache->key.offset; btrfs_put_block_group(cache); } +out: btrfs_free_path(path); - return 0; + return err; } int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr) @@ -3098,11 +3138,8 @@ static int update_space_info(struct btrfs_fs_info *info, u64 flags, static void set_avail_alloc_bits(struct btrfs_fs_info *fs_info, u64 flags) { - u64 extra_flags = flags & BTRFS_BLOCK_GROUP_PROFILE_MASK; - - /* chunk -> extended profile */ - if (extra_flags == 0) - extra_flags = BTRFS_AVAIL_ALLOC_BIT_SINGLE; + u64 extra_flags = chunk_to_extended(flags) & + BTRFS_EXTENDED_PROFILE_MASK; if (flags & BTRFS_BLOCK_GROUP_DATA) fs_info->avail_data_alloc_bits |= extra_flags; @@ -3113,6 +3150,35 @@ static void set_avail_alloc_bits(struct btrfs_fs_info *fs_info, u64 flags) } /* + * returns target flags in extended format or 0 if restripe for this + * chunk_type is not in progress + */ +static u64 get_restripe_target(struct btrfs_fs_info *fs_info, u64 flags) +{ + struct btrfs_balance_control *bctl = fs_info->balance_ctl; + u64 target = 0; + + BUG_ON(!mutex_is_locked(&fs_info->volume_mutex) && + !spin_is_locked(&fs_info->balance_lock)); + + if (!bctl) + return 0; + + if (flags & BTRFS_BLOCK_GROUP_DATA && + bctl->data.flags & BTRFS_BALANCE_ARGS_CONVERT) { + target = BTRFS_BLOCK_GROUP_DATA | bctl->data.target; + } else if (flags & BTRFS_BLOCK_GROUP_SYSTEM && + bctl->sys.flags & BTRFS_BALANCE_ARGS_CONVERT) { + target = BTRFS_BLOCK_GROUP_SYSTEM | bctl->sys.target; + } else if (flags & BTRFS_BLOCK_GROUP_METADATA && + bctl->meta.flags & BTRFS_BALANCE_ARGS_CONVERT) { + target = BTRFS_BLOCK_GROUP_METADATA | bctl->meta.target; + } + + return target; +} + +/* * @flags: available profiles in extended format (see ctree.h) * * Returns reduced profile in chunk format. If profile changing is in @@ -3128,31 +3194,19 @@ u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags) */ u64 num_devices = root->fs_info->fs_devices->rw_devices + root->fs_info->fs_devices->missing_devices; + u64 target; - /* pick restriper's target profile if it's available */ + /* + * see if restripe for this chunk_type is in progress, if so + * try to reduce to the target profile + */ spin_lock(&root->fs_info->balance_lock); - if (root->fs_info->balance_ctl) { - struct btrfs_balance_control *bctl = root->fs_info->balance_ctl; - u64 tgt = 0; - - if ((flags & BTRFS_BLOCK_GROUP_DATA) && - (bctl->data.flags & BTRFS_BALANCE_ARGS_CONVERT) && - (flags & bctl->data.target)) { - tgt = BTRFS_BLOCK_GROUP_DATA | bctl->data.target; - } else if ((flags & BTRFS_BLOCK_GROUP_SYSTEM) && - (bctl->sys.flags & BTRFS_BALANCE_ARGS_CONVERT) && - (flags & bctl->sys.target)) { - tgt = BTRFS_BLOCK_GROUP_SYSTEM | bctl->sys.target; - } else if ((flags & BTRFS_BLOCK_GROUP_METADATA) && - (bctl->meta.flags & BTRFS_BALANCE_ARGS_CONVERT) && - (flags & bctl->meta.target)) { - tgt = BTRFS_BLOCK_GROUP_METADATA | bctl->meta.target; - } - - if (tgt) { + target = get_restripe_target(root->fs_info, flags); + if (target) { + /* pick target profile only if it's already available */ + if ((flags & target) & BTRFS_EXTENDED_PROFILE_MASK) { spin_unlock(&root->fs_info->balance_lock); - flags = tgt; - goto out; + return extended_to_chunk(target); } } spin_unlock(&root->fs_info->balance_lock); @@ -3180,10 +3234,7 @@ u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags) flags &= ~BTRFS_BLOCK_GROUP_RAID0; } -out: - /* extended -> chunk profile */ - flags &= ~BTRFS_AVAIL_ALLOC_BIT_SINGLE; - return flags; + return extended_to_chunk(flags); } static u64 get_alloc_profile(struct btrfs_root *root, u64 flags) @@ -3312,7 +3363,7 @@ commit_trans: } data_sinfo->bytes_may_use += bytes; trace_btrfs_space_reservation(root->fs_info, "space_info", - (u64)data_sinfo, bytes, 1); + data_sinfo->flags, bytes, 1); spin_unlock(&data_sinfo->lock); return 0; @@ -3333,7 +3384,7 @@ void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes) spin_lock(&data_sinfo->lock); data_sinfo->bytes_may_use -= bytes; trace_btrfs_space_reservation(root->fs_info, "space_info", - (u64)data_sinfo, bytes, 0); + data_sinfo->flags, bytes, 0); spin_unlock(&data_sinfo->lock); } @@ -3394,6 +3445,50 @@ static int should_alloc_chunk(struct btrfs_root *root, return 1; } +static u64 get_system_chunk_thresh(struct btrfs_root *root, u64 type) +{ + u64 num_dev; + + if (type & BTRFS_BLOCK_GROUP_RAID10 || + type & BTRFS_BLOCK_GROUP_RAID0) + num_dev = root->fs_info->fs_devices->rw_devices; + else if (type & BTRFS_BLOCK_GROUP_RAID1) + num_dev = 2; + else + num_dev = 1; /* DUP or single */ + + /* metadata for updaing devices and chunk tree */ + return btrfs_calc_trans_metadata_size(root, num_dev + 1); +} + +static void check_system_chunk(struct btrfs_trans_handle *trans, + struct btrfs_root *root, u64 type) +{ + struct btrfs_space_info *info; + u64 left; + u64 thresh; + + info = __find_space_info(root->fs_info, BTRFS_BLOCK_GROUP_SYSTEM); + spin_lock(&info->lock); + left = info->total_bytes - info->bytes_used - info->bytes_pinned - + info->bytes_reserved - info->bytes_readonly; + spin_unlock(&info->lock); + + thresh = get_system_chunk_thresh(root, type); + if (left < thresh && btrfs_test_opt(root, ENOSPC_DEBUG)) { + printk(KERN_INFO "left=%llu, need=%llu, flags=%llu\n", + left, thresh, type); + dump_space_info(info, 0, 0); + } + + if (left < thresh) { + u64 flags; + + flags = btrfs_get_alloc_profile(root->fs_info->chunk_root, 0); + btrfs_alloc_chunk(trans, root, flags); + } +} + static int do_chunk_alloc(struct btrfs_trans_handle *trans, struct btrfs_root *extent_root, u64 alloc_bytes, u64 flags, int force) @@ -3403,15 +3498,13 @@ static int do_chunk_alloc(struct btrfs_trans_handle *trans, int wait_for_alloc = 0; int ret = 0; - BUG_ON(!profile_is_valid(flags, 0)); - space_info = __find_space_info(extent_root->fs_info, flags); if (!space_info) { ret = update_space_info(extent_root->fs_info, flags, 0, 0, &space_info); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ } - BUG_ON(!space_info); + BUG_ON(!space_info); /* Logic error */ again: spin_lock(&space_info->lock); @@ -3466,6 +3559,12 @@ again: force_metadata_allocation(fs_info); } + /* + * Check if we have enough space in SYSTEM chunk because we may need + * to update devices. + */ + check_system_chunk(trans, extent_root, flags); + ret = btrfs_alloc_chunk(trans, extent_root, flags); if (ret < 0 && ret != -ENOSPC) goto out; @@ -3611,12 +3710,15 @@ static int may_commit_transaction(struct btrfs_root *root, if (space_info != delayed_rsv->space_info) return -ENOSPC; + spin_lock(&space_info->lock); spin_lock(&delayed_rsv->lock); - if (delayed_rsv->size < bytes) { + if (space_info->bytes_pinned + delayed_rsv->size < bytes) { spin_unlock(&delayed_rsv->lock); + spin_unlock(&space_info->lock); return -ENOSPC; } spin_unlock(&delayed_rsv->lock); + spin_unlock(&space_info->lock); commit: trans = btrfs_join_transaction(root); @@ -3673,8 +3775,10 @@ again: ret = wait_event_interruptible(space_info->wait, !space_info->flush); /* Must have been interrupted, return */ - if (ret) + if (ret) { + printk(KERN_DEBUG "btrfs: %s returning -EINTR\n", __func__); return -EINTR; + } spin_lock(&space_info->lock); } @@ -3695,9 +3799,7 @@ again: if (used + orig_bytes <= space_info->total_bytes) { space_info->bytes_may_use += orig_bytes; trace_btrfs_space_reservation(root->fs_info, - "space_info", - (u64)space_info, - orig_bytes, 1); + "space_info", space_info->flags, orig_bytes, 1); ret = 0; } else { /* @@ -3766,9 +3868,7 @@ again: if (used + num_bytes < space_info->total_bytes + avail) { space_info->bytes_may_use += orig_bytes; trace_btrfs_space_reservation(root->fs_info, - "space_info", - (u64)space_info, - orig_bytes, 1); + "space_info", space_info->flags, orig_bytes, 1); ret = 0; } else { wait_ordered = true; @@ -3831,8 +3931,9 @@ out: return ret; } -static struct btrfs_block_rsv *get_block_rsv(struct btrfs_trans_handle *trans, - struct btrfs_root *root) +static struct btrfs_block_rsv *get_block_rsv( + const struct btrfs_trans_handle *trans, + const struct btrfs_root *root) { struct btrfs_block_rsv *block_rsv = NULL; @@ -3913,8 +4014,7 @@ static void block_rsv_release_bytes(struct btrfs_fs_info *fs_info, spin_lock(&space_info->lock); space_info->bytes_may_use -= num_bytes; trace_btrfs_space_reservation(fs_info, "space_info", - (u64)space_info, - num_bytes, 0); + space_info->flags, num_bytes, 0); space_info->reservation_progress++; spin_unlock(&space_info->lock); } @@ -4105,7 +4205,7 @@ static u64 calc_global_metadata_size(struct btrfs_fs_info *fs_info) num_bytes += div64_u64(data_used + meta_used, 50); if (num_bytes * 3 > meta_used) - num_bytes = div64_u64(meta_used, 3); + num_bytes = div64_u64(meta_used, 3) * 2; return ALIGN(num_bytes, fs_info->extent_root->leafsize << 10); } @@ -4132,14 +4232,14 @@ static void update_global_block_rsv(struct btrfs_fs_info *fs_info) block_rsv->reserved += num_bytes; sinfo->bytes_may_use += num_bytes; trace_btrfs_space_reservation(fs_info, "space_info", - (u64)sinfo, num_bytes, 1); + sinfo->flags, num_bytes, 1); } if (block_rsv->reserved >= block_rsv->size) { num_bytes = block_rsv->reserved - block_rsv->size; sinfo->bytes_may_use -= num_bytes; trace_btrfs_space_reservation(fs_info, "space_info", - (u64)sinfo, num_bytes, 0); + sinfo->flags, num_bytes, 0); sinfo->reservation_progress++; block_rsv->reserved = block_rsv->size; block_rsv->full = 1; @@ -4192,12 +4292,13 @@ void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans, if (!trans->bytes_reserved) return; - trace_btrfs_space_reservation(root->fs_info, "transaction", (u64)trans, - trans->bytes_reserved, 0); + trace_btrfs_space_reservation(root->fs_info, "transaction", + trans->transid, trans->bytes_reserved, 0); btrfs_block_rsv_release(root, trans->block_rsv, trans->bytes_reserved); trans->bytes_reserved = 0; } +/* Can only return 0 or -ENOSPC */ int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans, struct inode *inode) { @@ -4534,7 +4635,7 @@ static int update_block_group(struct btrfs_trans_handle *trans, while (total) { cache = btrfs_lookup_block_group(info, bytenr); if (!cache) - return -1; + return -ENOENT; if (cache->flags & (BTRFS_BLOCK_GROUP_DUP | BTRFS_BLOCK_GROUP_RAID1 | BTRFS_BLOCK_GROUP_RAID10)) @@ -4637,7 +4738,7 @@ int btrfs_pin_extent(struct btrfs_root *root, struct btrfs_block_group_cache *cache; cache = btrfs_lookup_block_group(root->fs_info, bytenr); - BUG_ON(!cache); + BUG_ON(!cache); /* Logic error */ pin_down_extent(root, cache, bytenr, num_bytes, reserved); @@ -4655,7 +4756,7 @@ int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans, struct btrfs_block_group_cache *cache; cache = btrfs_lookup_block_group(root->fs_info, bytenr); - BUG_ON(!cache); + BUG_ON(!cache); /* Logic error */ /* * pull in the free space cache (if any) so that our pin @@ -4700,6 +4801,7 @@ static int btrfs_update_reserved_bytes(struct btrfs_block_group_cache *cache, { struct btrfs_space_info *space_info = cache->space_info; int ret = 0; + spin_lock(&space_info->lock); spin_lock(&cache->lock); if (reserve != RESERVE_FREE) { @@ -4710,9 +4812,8 @@ static int btrfs_update_reserved_bytes(struct btrfs_block_group_cache *cache, space_info->bytes_reserved += num_bytes; if (reserve == RESERVE_ALLOC) { trace_btrfs_space_reservation(cache->fs_info, - "space_info", - (u64)space_info, - num_bytes, 0); + "space_info", space_info->flags, + num_bytes, 0); space_info->bytes_may_use -= num_bytes; } } @@ -4728,7 +4829,7 @@ static int btrfs_update_reserved_bytes(struct btrfs_block_group_cache *cache, return ret; } -int btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans, +void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans, struct btrfs_root *root) { struct btrfs_fs_info *fs_info = root->fs_info; @@ -4758,7 +4859,6 @@ int btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans, up_write(&fs_info->extent_commit_sem); update_global_block_rsv(fs_info); - return 0; } static int unpin_extent_range(struct btrfs_root *root, u64 start, u64 end) @@ -4773,7 +4873,7 @@ static int unpin_extent_range(struct btrfs_root *root, u64 start, u64 end) if (cache) btrfs_put_block_group(cache); cache = btrfs_lookup_block_group(fs_info, start); - BUG_ON(!cache); + BUG_ON(!cache); /* Logic error */ } len = cache->key.objectid + cache->key.offset - start; @@ -4810,6 +4910,9 @@ int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, u64 end; int ret; + if (trans->aborted) + return 0; + if (fs_info->pinned_extents == &fs_info->freed_extents[0]) unpin = &fs_info->freed_extents[1]; else @@ -4895,7 +4998,8 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans, ret = remove_extent_backref(trans, extent_root, path, NULL, refs_to_drop, is_data); - BUG_ON(ret); + if (ret) + goto abort; btrfs_release_path(path); path->leave_spinning = 1; @@ -4913,10 +5017,11 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans, btrfs_print_leaf(extent_root, path->nodes[0]); } - BUG_ON(ret); + if (ret < 0) + goto abort; extent_slot = path->slots[0]; } - } else { + } else if (ret == -ENOENT) { btrfs_print_leaf(extent_root, path->nodes[0]); WARN_ON(1); printk(KERN_ERR "btrfs unable to find ref byte nr %llu " @@ -4926,6 +5031,8 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans, (unsigned long long)root_objectid, (unsigned long long)owner_objectid, (unsigned long long)owner_offset); + } else { + goto abort; } leaf = path->nodes[0]; @@ -4935,7 +5042,8 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans, BUG_ON(found_extent || extent_slot != path->slots[0]); ret = convert_extent_item_v0(trans, extent_root, path, owner_objectid, 0); - BUG_ON(ret < 0); + if (ret < 0) + goto abort; btrfs_release_path(path); path->leave_spinning = 1; @@ -4952,7 +5060,8 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans, (unsigned long long)bytenr); btrfs_print_leaf(extent_root, path->nodes[0]); } - BUG_ON(ret); + if (ret < 0) + goto abort; extent_slot = path->slots[0]; leaf = path->nodes[0]; item_size = btrfs_item_size_nr(leaf, extent_slot); @@ -4989,7 +5098,8 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans, ret = remove_extent_backref(trans, extent_root, path, iref, refs_to_drop, is_data); - BUG_ON(ret); + if (ret) + goto abort; } } else { if (found_extent) { @@ -5006,23 +5116,27 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans, ret = btrfs_del_items(trans, extent_root, path, path->slots[0], num_to_del); - BUG_ON(ret); + if (ret) + goto abort; btrfs_release_path(path); if (is_data) { ret = btrfs_del_csums(trans, root, bytenr, num_bytes); - BUG_ON(ret); - } else { - invalidate_mapping_pages(info->btree_inode->i_mapping, - bytenr >> PAGE_CACHE_SHIFT, - (bytenr + num_bytes - 1) >> PAGE_CACHE_SHIFT); + if (ret) + goto abort; } ret = update_block_group(trans, root, bytenr, num_bytes, 0); - BUG_ON(ret); + if (ret) + goto abort; } +out: btrfs_free_path(path); return ret; + +abort: + btrfs_abort_transaction(trans, extent_root, ret); + goto out; } /* @@ -5118,7 +5232,7 @@ void btrfs_free_tree_block(struct btrfs_trans_handle *trans, parent, root->root_key.objectid, btrfs_header_level(buf), BTRFS_DROP_DELAYED_REF, NULL, for_cow); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ } if (!last_ref) @@ -5152,6 +5266,7 @@ out: btrfs_put_block_group(cache); } +/* Can return -ENOMEM */ int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root *root, u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid, u64 owner, u64 offset, int for_cow) @@ -5173,14 +5288,12 @@ int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root *root, num_bytes, parent, root_objectid, (int)owner, BTRFS_DROP_DELAYED_REF, NULL, for_cow); - BUG_ON(ret); } else { ret = btrfs_add_delayed_data_ref(fs_info, trans, bytenr, num_bytes, parent, root_objectid, owner, offset, BTRFS_DROP_DELAYED_REF, NULL, for_cow); - BUG_ON(ret); } return ret; } @@ -5237,28 +5350,34 @@ wait_block_group_cache_done(struct btrfs_block_group_cache *cache) return 0; } -static int get_block_group_index(struct btrfs_block_group_cache *cache) +static int __get_block_group_index(u64 flags) { int index; - if (cache->flags & BTRFS_BLOCK_GROUP_RAID10) + + if (flags & BTRFS_BLOCK_GROUP_RAID10) index = 0; - else if (cache->flags & BTRFS_BLOCK_GROUP_RAID1) + else if (flags & BTRFS_BLOCK_GROUP_RAID1) index = 1; - else if (cache->flags & BTRFS_BLOCK_GROUP_DUP) + else if (flags & BTRFS_BLOCK_GROUP_DUP) index = 2; - else if (cache->flags & BTRFS_BLOCK_GROUP_RAID0) + else if (flags & BTRFS_BLOCK_GROUP_RAID0) index = 3; else index = 4; + return index; } +static int get_block_group_index(struct btrfs_block_group_cache *cache) +{ + return __get_block_group_index(cache->flags); +} + enum btrfs_loop_type { - LOOP_FIND_IDEAL = 0, - LOOP_CACHING_NOWAIT = 1, - LOOP_CACHING_WAIT = 2, - LOOP_ALLOC_CHUNK = 3, - LOOP_NO_EMPTY_SIZE = 4, + LOOP_CACHING_NOWAIT = 0, + LOOP_CACHING_WAIT = 1, + LOOP_ALLOC_CHUNK = 2, + LOOP_NO_EMPTY_SIZE = 3, }; /* @@ -5272,7 +5391,6 @@ enum btrfs_loop_type { static noinline int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root *orig_root, u64 num_bytes, u64 empty_size, - u64 search_start, u64 search_end, u64 hint_byte, struct btrfs_key *ins, u64 data) { @@ -5281,6 +5399,7 @@ static noinline int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_free_cluster *last_ptr = NULL; struct btrfs_block_group_cache *block_group = NULL; struct btrfs_block_group_cache *used_block_group; + u64 search_start = 0; int empty_cluster = 2 * 1024 * 1024; int allowed_chunk_alloc = 0; int done_chunk_alloc = 0; @@ -5294,8 +5413,6 @@ static noinline int find_free_extent(struct btrfs_trans_handle *trans, bool failed_alloc = false; bool use_cluster = true; bool have_caching_bg = false; - u64 ideal_cache_percent = 0; - u64 ideal_cache_offset = 0; WARN_ON(num_bytes < root->sectorsize); btrfs_set_key_type(ins, BTRFS_EXTENT_ITEM_KEY); @@ -5345,7 +5462,6 @@ static noinline int find_free_extent(struct btrfs_trans_handle *trans, empty_cluster = 0; if (search_start == hint_byte) { -ideal_cache: block_group = btrfs_lookup_block_group(root->fs_info, search_start); used_block_group = block_group; @@ -5357,8 +5473,7 @@ ideal_cache: * picked out then we don't care that the block group is cached. */ if (block_group && block_group_bits(block_group, data) && - (block_group->cached != BTRFS_CACHE_NO || - search_start == ideal_cache_offset)) { + block_group->cached != BTRFS_CACHE_NO) { down_read(&space_info->groups_sem); if (list_empty(&block_group->list) || block_group->ro) { @@ -5412,44 +5527,13 @@ search: have_block_group: cached = block_group_cache_done(block_group); if (unlikely(!cached)) { - u64 free_percent; - found_uncached_bg = true; ret = cache_block_group(block_group, trans, - orig_root, 1); - if (block_group->cached == BTRFS_CACHE_FINISHED) - goto alloc; - - free_percent = btrfs_block_group_used(&block_group->item); - free_percent *= 100; - free_percent = div64_u64(free_percent, - block_group->key.offset); - free_percent = 100 - free_percent; - if (free_percent > ideal_cache_percent && - likely(!block_group->ro)) { - ideal_cache_offset = block_group->key.objectid; - ideal_cache_percent = free_percent; - } - - /* - * The caching workers are limited to 2 threads, so we - * can queue as much work as we care to. - */ - if (loop > LOOP_FIND_IDEAL) { - ret = cache_block_group(block_group, trans, - orig_root, 0); - BUG_ON(ret); - } - - /* - * If loop is set for cached only, try the next block - * group. - */ - if (loop == LOOP_FIND_IDEAL) - goto loop; + orig_root, 0); + BUG_ON(ret < 0); + ret = 0; } -alloc: if (unlikely(block_group->ro)) goto loop; @@ -5600,11 +5684,6 @@ unclustered_alloc: } checks: search_start = stripe_align(root, offset); - /* move on to the next group */ - if (search_start + num_bytes >= search_end) { - btrfs_add_free_space(used_block_group, offset, num_bytes); - goto loop; - } /* move on to the next group */ if (search_start + num_bytes > @@ -5655,9 +5734,7 @@ loop: if (!ins->objectid && ++index < BTRFS_NR_RAID_TYPES) goto search; - /* LOOP_FIND_IDEAL, only search caching/cached bg's, and don't wait for - * for them to make caching progress. Also - * determine the best possible bg to cache + /* * LOOP_CACHING_NOWAIT, search partially cached block groups, kicking * caching kthreads as we move along * LOOP_CACHING_WAIT, search everything, and wait if our bg is caching @@ -5667,50 +5744,17 @@ loop: */ if (!ins->objectid && loop < LOOP_NO_EMPTY_SIZE) { index = 0; - if (loop == LOOP_FIND_IDEAL && found_uncached_bg) { - found_uncached_bg = false; - loop++; - if (!ideal_cache_percent) - goto search; - - /* - * 1 of the following 2 things have happened so far - * - * 1) We found an ideal block group for caching that - * is mostly full and will cache quickly, so we might - * as well wait for it. - * - * 2) We searched for cached only and we didn't find - * anything, and we didn't start any caching kthreads - * either, so chances are we will loop through and - * start a couple caching kthreads, and then come back - * around and just wait for them. This will be slower - * because we will have 2 caching kthreads reading at - * the same time when we could have just started one - * and waited for it to get far enough to give us an - * allocation, so go ahead and go to the wait caching - * loop. - */ - loop = LOOP_CACHING_WAIT; - search_start = ideal_cache_offset; - ideal_cache_percent = 0; - goto ideal_cache; - } else if (loop == LOOP_FIND_IDEAL) { - /* - * Didn't find a uncached bg, wait on anything we find - * next. - */ - loop = LOOP_CACHING_WAIT; - goto search; - } - loop++; - if (loop == LOOP_ALLOC_CHUNK) { if (allowed_chunk_alloc) { ret = do_chunk_alloc(trans, root, num_bytes + 2 * 1024 * 1024, data, CHUNK_ALLOC_LIMITED); + if (ret < 0) { + btrfs_abort_transaction(trans, + root, ret); + goto out; + } allowed_chunk_alloc = 0; if (ret == 1) done_chunk_alloc = 1; @@ -5739,6 +5783,7 @@ loop: } else if (ins->objectid) { ret = 0; } +out: return ret; } @@ -5792,12 +5837,10 @@ int btrfs_reserve_extent(struct btrfs_trans_handle *trans, struct btrfs_root *root, u64 num_bytes, u64 min_alloc_size, u64 empty_size, u64 hint_byte, - u64 search_end, struct btrfs_key *ins, - u64 data) + struct btrfs_key *ins, u64 data) { bool final_tried = false; int ret; - u64 search_start = 0; data = btrfs_get_alloc_profile(root, data); again: @@ -5805,23 +5848,31 @@ again: * the only place that sets empty_size is btrfs_realloc_node, which * is not called recursively on allocations */ - if (empty_size || root->ref_cows) + if (empty_size || root->ref_cows) { ret = do_chunk_alloc(trans, root->fs_info->extent_root, num_bytes + 2 * 1024 * 1024, data, CHUNK_ALLOC_NO_FORCE); + if (ret < 0 && ret != -ENOSPC) { + btrfs_abort_transaction(trans, root, ret); + return ret; + } + } WARN_ON(num_bytes < root->sectorsize); ret = find_free_extent(trans, root, num_bytes, empty_size, - search_start, search_end, hint_byte, - ins, data); + hint_byte, ins, data); if (ret == -ENOSPC) { if (!final_tried) { num_bytes = num_bytes >> 1; num_bytes = num_bytes & ~(root->sectorsize - 1); num_bytes = max(num_bytes, min_alloc_size); - do_chunk_alloc(trans, root->fs_info->extent_root, + ret = do_chunk_alloc(trans, root->fs_info->extent_root, num_bytes, data, CHUNK_ALLOC_FORCE); + if (ret < 0 && ret != -ENOSPC) { + btrfs_abort_transaction(trans, root, ret); + return ret; + } if (num_bytes == min_alloc_size) final_tried = true; goto again; @@ -5832,7 +5883,8 @@ again: printk(KERN_ERR "btrfs allocation failed flags %llu, " "wanted %llu\n", (unsigned long long)data, (unsigned long long)num_bytes); - dump_space_info(sinfo, num_bytes, 1); + if (sinfo) + dump_space_info(sinfo, num_bytes, 1); } } @@ -5911,7 +5963,10 @@ static int alloc_reserved_file_extent(struct btrfs_trans_handle *trans, path->leave_spinning = 1; ret = btrfs_insert_empty_item(trans, fs_info->extent_root, path, ins, size); - BUG_ON(ret); + if (ret) { + btrfs_free_path(path); + return ret; + } leaf = path->nodes[0]; extent_item = btrfs_item_ptr(leaf, path->slots[0], @@ -5941,7 +5996,7 @@ static int alloc_reserved_file_extent(struct btrfs_trans_handle *trans, btrfs_free_path(path); ret = update_block_group(trans, root, ins->objectid, ins->offset, 1); - if (ret) { + if (ret) { /* -ENOENT, logic error */ printk(KERN_ERR "btrfs update block group failed for %llu " "%llu\n", (unsigned long long)ins->objectid, (unsigned long long)ins->offset); @@ -5972,7 +6027,10 @@ static int alloc_reserved_tree_block(struct btrfs_trans_handle *trans, path->leave_spinning = 1; ret = btrfs_insert_empty_item(trans, fs_info->extent_root, path, ins, size); - BUG_ON(ret); + if (ret) { + btrfs_free_path(path); + return ret; + } leaf = path->nodes[0]; extent_item = btrfs_item_ptr(leaf, path->slots[0], @@ -6002,7 +6060,7 @@ static int alloc_reserved_tree_block(struct btrfs_trans_handle *trans, btrfs_free_path(path); ret = update_block_group(trans, root, ins->objectid, ins->offset, 1); - if (ret) { + if (ret) { /* -ENOENT, logic error */ printk(KERN_ERR "btrfs update block group failed for %llu " "%llu\n", (unsigned long long)ins->objectid, (unsigned long long)ins->offset); @@ -6050,28 +6108,28 @@ int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, if (!caching_ctl) { BUG_ON(!block_group_cache_done(block_group)); ret = btrfs_remove_free_space(block_group, start, num_bytes); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ } else { mutex_lock(&caching_ctl->mutex); if (start >= caching_ctl->progress) { ret = add_excluded_extent(root, start, num_bytes); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ } else if (start + num_bytes <= caching_ctl->progress) { ret = btrfs_remove_free_space(block_group, start, num_bytes); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ } else { num_bytes = caching_ctl->progress - start; ret = btrfs_remove_free_space(block_group, start, num_bytes); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ start = caching_ctl->progress; num_bytes = ins->objectid + ins->offset - caching_ctl->progress; ret = add_excluded_extent(root, start, num_bytes); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ } mutex_unlock(&caching_ctl->mutex); @@ -6080,7 +6138,7 @@ int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, ret = btrfs_update_reserved_bytes(block_group, ins->offset, RESERVE_ALLOC_NO_ACCOUNT); - BUG_ON(ret); + BUG_ON(ret); /* logic error */ btrfs_put_block_group(block_group); ret = alloc_reserved_file_extent(trans, root, 0, root_objectid, 0, owner, offset, ins, 1); @@ -6101,6 +6159,7 @@ struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans, btrfs_set_buffer_lockdep_class(root->root_key.objectid, buf, level); btrfs_tree_lock(buf); clean_tree_block(trans, root, buf); + clear_bit(EXTENT_BUFFER_STALE, &buf->bflags); btrfs_set_lock_blocking(buf); btrfs_set_buffer_uptodate(buf); @@ -6208,7 +6267,7 @@ struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, return ERR_CAST(block_rsv); ret = btrfs_reserve_extent(trans, root, blocksize, blocksize, - empty_size, hint, (u64)-1, &ins, 0); + empty_size, hint, &ins, 0); if (ret) { unuse_block_rsv(root->fs_info, block_rsv, blocksize); return ERR_PTR(ret); @@ -6216,7 +6275,7 @@ struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, buf = btrfs_init_new_buffer(trans, root, ins.objectid, blocksize, level); - BUG_ON(IS_ERR(buf)); + BUG_ON(IS_ERR(buf)); /* -ENOMEM */ if (root_objectid == BTRFS_TREE_RELOC_OBJECTID) { if (parent == 0) @@ -6228,7 +6287,7 @@ struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, if (root_objectid != BTRFS_TREE_LOG_OBJECTID) { struct btrfs_delayed_extent_op *extent_op; extent_op = kmalloc(sizeof(*extent_op), GFP_NOFS); - BUG_ON(!extent_op); + BUG_ON(!extent_op); /* -ENOMEM */ if (key) memcpy(&extent_op->key, key, sizeof(extent_op->key)); else @@ -6243,7 +6302,7 @@ struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, ins.offset, parent, root_objectid, level, BTRFS_ADD_DELAYED_EXTENT, extent_op, for_cow); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ } return buf; } @@ -6313,7 +6372,9 @@ static noinline void reada_walk_down(struct btrfs_trans_handle *trans, /* We don't lock the tree block, it's OK to be racy here */ ret = btrfs_lookup_extent_info(trans, root, bytenr, blocksize, &refs, &flags); - BUG_ON(ret); + /* We don't care about errors in readahead. */ + if (ret < 0) + continue; BUG_ON(refs == 0); if (wc->stage == DROP_REFERENCE) { @@ -6380,7 +6441,9 @@ static noinline int walk_down_proc(struct btrfs_trans_handle *trans, eb->start, eb->len, &wc->refs[level], &wc->flags[level]); - BUG_ON(ret); + BUG_ON(ret == -ENOMEM); + if (ret) + return ret; BUG_ON(wc->refs[level] == 0); } @@ -6399,12 +6462,12 @@ static noinline int walk_down_proc(struct btrfs_trans_handle *trans, if (!(wc->flags[level] & flag)) { BUG_ON(!path->locks[level]); ret = btrfs_inc_ref(trans, root, eb, 1, wc->for_reloc); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ ret = btrfs_dec_ref(trans, root, eb, 0, wc->for_reloc); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ ret = btrfs_set_disk_extent_flags(trans, root, eb->start, eb->len, flag, 0); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ wc->flags[level] |= flag; } @@ -6476,7 +6539,11 @@ static noinline int do_walk_down(struct btrfs_trans_handle *trans, ret = btrfs_lookup_extent_info(trans, root, bytenr, blocksize, &wc->refs[level - 1], &wc->flags[level - 1]); - BUG_ON(ret); + if (ret < 0) { + btrfs_tree_unlock(next); + return ret; + } + BUG_ON(wc->refs[level - 1] == 0); *lookup_info = 0; @@ -6545,7 +6612,7 @@ skip: ret = btrfs_free_extent(trans, root, bytenr, blocksize, parent, root->root_key.objectid, level - 1, 0, 0); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ } btrfs_tree_unlock(next); free_extent_buffer(next); @@ -6603,7 +6670,10 @@ static noinline int walk_up_proc(struct btrfs_trans_handle *trans, eb->start, eb->len, &wc->refs[level], &wc->flags[level]); - BUG_ON(ret); + if (ret < 0) { + btrfs_tree_unlock_rw(eb, path->locks[level]); + return ret; + } BUG_ON(wc->refs[level] == 0); if (wc->refs[level] == 1) { btrfs_tree_unlock_rw(eb, path->locks[level]); @@ -6623,7 +6693,7 @@ static noinline int walk_up_proc(struct btrfs_trans_handle *trans, else ret = btrfs_dec_ref(trans, root, eb, 0, wc->for_reloc); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ } /* make block locked assertion in clean_tree_block happy */ if (!path->locks[level] && @@ -6732,7 +6802,7 @@ static noinline int walk_up_tree(struct btrfs_trans_handle *trans, * also make sure backrefs for the shared block and all lower level * blocks are properly updated. */ -void btrfs_drop_snapshot(struct btrfs_root *root, +int btrfs_drop_snapshot(struct btrfs_root *root, struct btrfs_block_rsv *block_rsv, int update_ref, int for_reloc) { @@ -6760,7 +6830,10 @@ void btrfs_drop_snapshot(struct btrfs_root *root, } trans = btrfs_start_transaction(tree_root, 0); - BUG_ON(IS_ERR(trans)); + if (IS_ERR(trans)) { + err = PTR_ERR(trans); + goto out_free; + } if (block_rsv) trans->block_rsv = block_rsv; @@ -6785,7 +6858,7 @@ void btrfs_drop_snapshot(struct btrfs_root *root, path->lowest_level = 0; if (ret < 0) { err = ret; - goto out_free; + goto out_end_trans; } WARN_ON(ret > 0); @@ -6805,7 +6878,10 @@ void btrfs_drop_snapshot(struct btrfs_root *root, path->nodes[level]->len, &wc->refs[level], &wc->flags[level]); - BUG_ON(ret); + if (ret < 0) { + err = ret; + goto out_end_trans; + } BUG_ON(wc->refs[level] == 0); if (level == root_item->drop_level) @@ -6856,26 +6932,40 @@ void btrfs_drop_snapshot(struct btrfs_root *root, ret = btrfs_update_root(trans, tree_root, &root->root_key, root_item); - BUG_ON(ret); + if (ret) { + btrfs_abort_transaction(trans, tree_root, ret); + err = ret; + goto out_end_trans; + } btrfs_end_transaction_throttle(trans, tree_root); trans = btrfs_start_transaction(tree_root, 0); - BUG_ON(IS_ERR(trans)); + if (IS_ERR(trans)) { + err = PTR_ERR(trans); + goto out_free; + } if (block_rsv) trans->block_rsv = block_rsv; } } btrfs_release_path(path); - BUG_ON(err); + if (err) + goto out_end_trans; ret = btrfs_del_root(trans, tree_root, &root->root_key); - BUG_ON(ret); + if (ret) { + btrfs_abort_transaction(trans, tree_root, ret); + goto out_end_trans; + } if (root->root_key.objectid != BTRFS_TREE_RELOC_OBJECTID) { ret = btrfs_find_last_root(tree_root, root->root_key.objectid, NULL, NULL); - BUG_ON(ret < 0); - if (ret > 0) { + if (ret < 0) { + btrfs_abort_transaction(trans, tree_root, ret); + err = ret; + goto out_end_trans; + } else if (ret > 0) { /* if we fail to delete the orphan item this time * around, it'll get picked up the next time. * @@ -6893,14 +6983,15 @@ void btrfs_drop_snapshot(struct btrfs_root *root, free_extent_buffer(root->commit_root); kfree(root); } -out_free: +out_end_trans: btrfs_end_transaction_throttle(trans, tree_root); +out_free: kfree(wc); btrfs_free_path(path); out: if (err) btrfs_std_error(root->fs_info, err); - return; + return err; } /* @@ -6977,31 +7068,15 @@ int btrfs_drop_subtree(struct btrfs_trans_handle *trans, static u64 update_block_group_flags(struct btrfs_root *root, u64 flags) { u64 num_devices; - u64 stripped = BTRFS_BLOCK_GROUP_RAID0 | - BTRFS_BLOCK_GROUP_RAID1 | BTRFS_BLOCK_GROUP_RAID10; - - if (root->fs_info->balance_ctl) { - struct btrfs_balance_control *bctl = root->fs_info->balance_ctl; - u64 tgt = 0; - - /* pick restriper's target profile and return */ - if (flags & BTRFS_BLOCK_GROUP_DATA && - bctl->data.flags & BTRFS_BALANCE_ARGS_CONVERT) { - tgt = BTRFS_BLOCK_GROUP_DATA | bctl->data.target; - } else if (flags & BTRFS_BLOCK_GROUP_SYSTEM && - bctl->sys.flags & BTRFS_BALANCE_ARGS_CONVERT) { - tgt = BTRFS_BLOCK_GROUP_SYSTEM | bctl->sys.target; - } else if (flags & BTRFS_BLOCK_GROUP_METADATA && - bctl->meta.flags & BTRFS_BALANCE_ARGS_CONVERT) { - tgt = BTRFS_BLOCK_GROUP_METADATA | bctl->meta.target; - } + u64 stripped; - if (tgt) { - /* extended -> chunk profile */ - tgt &= ~BTRFS_AVAIL_ALLOC_BIT_SINGLE; - return tgt; - } - } + /* + * if restripe for this chunk_type is on pick target profile and + * return, otherwise do the usual balance + */ + stripped = get_restripe_target(root->fs_info, flags); + if (stripped) + return extended_to_chunk(stripped); /* * we add in the count of missing devices because we want @@ -7011,6 +7086,9 @@ static u64 update_block_group_flags(struct btrfs_root *root, u64 flags) num_devices = root->fs_info->fs_devices->rw_devices + root->fs_info->fs_devices->missing_devices; + stripped = BTRFS_BLOCK_GROUP_RAID0 | + BTRFS_BLOCK_GROUP_RAID1 | BTRFS_BLOCK_GROUP_RAID10; + if (num_devices == 1) { stripped |= BTRFS_BLOCK_GROUP_DUP; stripped = flags & ~stripped; @@ -7023,7 +7101,6 @@ static u64 update_block_group_flags(struct btrfs_root *root, u64 flags) if (flags & (BTRFS_BLOCK_GROUP_RAID1 | BTRFS_BLOCK_GROUP_RAID10)) return stripped | BTRFS_BLOCK_GROUP_DUP; - return flags; } else { /* they already had raid on here, just return */ if (flags & stripped) @@ -7036,9 +7113,9 @@ static u64 update_block_group_flags(struct btrfs_root *root, u64 flags) if (flags & BTRFS_BLOCK_GROUP_DUP) return stripped | BTRFS_BLOCK_GROUP_RAID1; - /* turn single device chunks into raid0 */ - return stripped | BTRFS_BLOCK_GROUP_RAID0; + /* this is drive concat, leave it alone */ } + return flags; } @@ -7097,12 +7174,16 @@ int btrfs_set_block_group_ro(struct btrfs_root *root, BUG_ON(cache->ro); trans = btrfs_join_transaction(root); - BUG_ON(IS_ERR(trans)); + if (IS_ERR(trans)) + return PTR_ERR(trans); alloc_flags = update_block_group_flags(root, cache->flags); - if (alloc_flags != cache->flags) - do_chunk_alloc(trans, root, 2 * 1024 * 1024, alloc_flags, - CHUNK_ALLOC_FORCE); + if (alloc_flags != cache->flags) { + ret = do_chunk_alloc(trans, root, 2 * 1024 * 1024, alloc_flags, + CHUNK_ALLOC_FORCE); + if (ret < 0) + goto out; + } ret = set_block_group_ro(cache, 0); if (!ret) @@ -7182,7 +7263,7 @@ u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo) return free_bytes; } -int btrfs_set_block_group_rw(struct btrfs_root *root, +void btrfs_set_block_group_rw(struct btrfs_root *root, struct btrfs_block_group_cache *cache) { struct btrfs_space_info *sinfo = cache->space_info; @@ -7198,7 +7279,6 @@ int btrfs_set_block_group_rw(struct btrfs_root *root, cache->ro = 0; spin_unlock(&cache->lock); spin_unlock(&sinfo->lock); - return 0; } /* @@ -7216,6 +7296,7 @@ int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr) u64 min_free; u64 dev_min = 1; u64 dev_nr = 0; + u64 target; int index; int full = 0; int ret = 0; @@ -7256,13 +7337,11 @@ int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr) /* * ok we don't have enough space, but maybe we have free space on our * devices to allocate new chunks for relocation, so loop through our - * alloc devices and guess if we have enough space. However, if we - * were marked as full, then we know there aren't enough chunks, and we - * can just return. + * alloc devices and guess if we have enough space. if this block + * group is going to be restriped, run checks against the target + * profile instead of the current one. */ ret = -1; - if (full) - goto out; /* * index: @@ -7272,7 +7351,20 @@ int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr) * 3: raid0 * 4: single */ - index = get_block_group_index(block_group); + target = get_restripe_target(root->fs_info, block_group->flags); + if (target) { + index = __get_block_group_index(extended_to_chunk(target)); + } else { + /* + * this is just a balance, so if we were marked as full + * we know there is no space for a new chunk + */ + if (full) + goto out; + + index = get_block_group_index(block_group); + } + if (index == 0) { dev_min = 4; /* Divide by 2 */ @@ -7566,7 +7658,7 @@ int btrfs_read_block_groups(struct btrfs_root *root) ret = update_space_info(info, cache->flags, found_key.offset, btrfs_block_group_used(&cache->item), &space_info); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ cache->space_info = space_info; spin_lock(&cache->space_info->lock); cache->space_info->bytes_readonly += cache->bytes_super; @@ -7575,7 +7667,7 @@ int btrfs_read_block_groups(struct btrfs_root *root) __link_block_group(space_info, cache); ret = btrfs_add_block_group_cache(root->fs_info, cache); - BUG_ON(ret); + BUG_ON(ret); /* Logic error */ set_avail_alloc_bits(root->fs_info, cache->flags); if (btrfs_chunk_readonly(root, cache->key.objectid)) @@ -7657,7 +7749,7 @@ int btrfs_make_block_group(struct btrfs_trans_handle *trans, ret = update_space_info(root->fs_info, cache->flags, size, bytes_used, &cache->space_info); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ update_global_block_rsv(root->fs_info); spin_lock(&cache->space_info->lock); @@ -7667,11 +7759,14 @@ int btrfs_make_block_group(struct btrfs_trans_handle *trans, __link_block_group(cache->space_info, cache); ret = btrfs_add_block_group_cache(root->fs_info, cache); - BUG_ON(ret); + BUG_ON(ret); /* Logic error */ ret = btrfs_insert_item(trans, extent_root, &cache->key, &cache->item, sizeof(cache->item)); - BUG_ON(ret); + if (ret) { + btrfs_abort_transaction(trans, extent_root, ret); + return ret; + } set_avail_alloc_bits(extent_root->fs_info, type); @@ -7680,11 +7775,8 @@ int btrfs_make_block_group(struct btrfs_trans_handle *trans, static void clear_avail_alloc_bits(struct btrfs_fs_info *fs_info, u64 flags) { - u64 extra_flags = flags & BTRFS_BLOCK_GROUP_PROFILE_MASK; - - /* chunk -> extended profile */ - if (extra_flags == 0) - extra_flags = BTRFS_AVAIL_ALLOC_BIT_SINGLE; + u64 extra_flags = chunk_to_extended(flags) & + BTRFS_EXTENDED_PROFILE_MASK; if (flags & BTRFS_BLOCK_GROUP_DATA) fs_info->avail_data_alloc_bits &= ~extra_flags; @@ -7752,7 +7844,10 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans, inode = lookup_free_space_inode(tree_root, block_group, path); if (!IS_ERR(inode)) { ret = btrfs_orphan_add(trans, inode); - BUG_ON(ret); + if (ret) { + btrfs_add_delayed_iput(inode); + goto out; + } clear_nlink(inode); /* One for the block groups ref */ spin_lock(&block_group->lock); @@ -7886,9 +7981,16 @@ int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range) u64 start; u64 end; u64 trimmed = 0; + u64 total_bytes = btrfs_super_total_bytes(fs_info->super_copy); int ret = 0; - cache = btrfs_lookup_block_group(fs_info, range->start); + /* + * try to trim all FS space, our block group may start from non-zero. + */ + if (range->len == total_bytes) + cache = btrfs_lookup_first_block_group(fs_info, range->start); + else + cache = btrfs_lookup_block_group(fs_info, range->start); while (cache) { if (cache->key.objectid >= (range->start + range->len)) { diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index fcf77e1..8d904dd 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -19,6 +19,7 @@ #include "btrfs_inode.h" #include "volumes.h" #include "check-integrity.h" +#include "locking.h" static struct kmem_cache *extent_state_cache; static struct kmem_cache *extent_buffer_cache; @@ -53,6 +54,13 @@ struct extent_page_data { unsigned int sync_io:1; }; +static noinline void flush_write_bio(void *data); +static inline struct btrfs_fs_info * +tree_fs_info(struct extent_io_tree *tree) +{ + return btrfs_sb(tree->mapping->host->i_sb); +} + int __init extent_io_init(void) { extent_state_cache = kmem_cache_create("extent_state", @@ -136,6 +144,7 @@ static struct extent_state *alloc_extent_state(gfp_t mask) #endif atomic_set(&state->refs, 1); init_waitqueue_head(&state->wq); + trace_alloc_extent_state(state, mask, _RET_IP_); return state; } @@ -153,6 +162,7 @@ void free_extent_state(struct extent_state *state) list_del(&state->leak_list); spin_unlock_irqrestore(&leak_lock, flags); #endif + trace_free_extent_state(state, _RET_IP_); kmem_cache_free(extent_state_cache, state); } } @@ -439,6 +449,13 @@ alloc_extent_state_atomic(struct extent_state *prealloc) return prealloc; } +void extent_io_tree_panic(struct extent_io_tree *tree, int err) +{ + btrfs_panic(tree_fs_info(tree), err, "Locking error: " + "Extent tree was modified by another " + "thread while locked."); +} + /* * clear some bits on a range in the tree. This may require splitting * or inserting elements in the tree, so the gfp mask is used to @@ -449,8 +466,7 @@ alloc_extent_state_atomic(struct extent_state *prealloc) * * the range [start, end] is inclusive. * - * This takes the tree lock, and returns < 0 on error, > 0 if any of the - * bits were already set, or zero if none of the bits were already set. + * This takes the tree lock, and returns 0 on success and < 0 on error. */ int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits, int wake, int delete, @@ -464,7 +480,6 @@ int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, struct rb_node *node; u64 last_end; int err; - int set = 0; int clear = 0; if (delete) @@ -513,6 +528,15 @@ hit_next: WARN_ON(state->end < start); last_end = state->end; + if (state->end < end && !need_resched()) + next_node = rb_next(&state->rb_node); + else + next_node = NULL; + + /* the state doesn't have the wanted bits, go ahead */ + if (!(state->state & bits)) + goto next; + /* * | ---- desired range ---- | * | state | or @@ -533,12 +557,14 @@ hit_next: prealloc = alloc_extent_state_atomic(prealloc); BUG_ON(!prealloc); err = split_state(tree, state, prealloc, start); - BUG_ON(err == -EEXIST); + if (err) + extent_io_tree_panic(tree, err); + prealloc = NULL; if (err) goto out; if (state->end <= end) { - set |= clear_state_bit(tree, state, &bits, wake); + clear_state_bit(tree, state, &bits, wake); if (last_end == (u64)-1) goto out; start = last_end + 1; @@ -555,30 +581,27 @@ hit_next: prealloc = alloc_extent_state_atomic(prealloc); BUG_ON(!prealloc); err = split_state(tree, state, prealloc, end + 1); - BUG_ON(err == -EEXIST); + if (err) + extent_io_tree_panic(tree, err); + if (wake) wake_up(&state->wq); - set |= clear_state_bit(tree, prealloc, &bits, wake); + clear_state_bit(tree, prealloc, &bits, wake); prealloc = NULL; goto out; } - if (state->end < end && prealloc && !need_resched()) - next_node = rb_next(&state->rb_node); - else - next_node = NULL; - - set |= clear_state_bit(tree, state, &bits, wake); + clear_state_bit(tree, state, &bits, wake); +next: if (last_end == (u64)-1) goto out; start = last_end + 1; if (start <= end && next_node) { state = rb_entry(next_node, struct extent_state, rb_node); - if (state->start == start) - goto hit_next; + goto hit_next; } goto search_again; @@ -587,7 +610,7 @@ out: if (prealloc) free_extent_state(prealloc); - return set; + return 0; search_again: if (start > end) @@ -598,8 +621,8 @@ search_again: goto again; } -static int wait_on_state(struct extent_io_tree *tree, - struct extent_state *state) +static void wait_on_state(struct extent_io_tree *tree, + struct extent_state *state) __releases(tree->lock) __acquires(tree->lock) { @@ -609,7 +632,6 @@ static int wait_on_state(struct extent_io_tree *tree, schedule(); spin_lock(&tree->lock); finish_wait(&state->wq, &wait); - return 0; } /* @@ -617,7 +639,7 @@ static int wait_on_state(struct extent_io_tree *tree, * The range [start, end] is inclusive. * The tree lock is taken by this function */ -int wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits) +void wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits) { struct extent_state *state; struct rb_node *node; @@ -654,7 +676,6 @@ again: } out: spin_unlock(&tree->lock); - return 0; } static void set_state_bits(struct extent_io_tree *tree, @@ -702,9 +723,10 @@ static void uncache_state(struct extent_state **cached_ptr) * [start, end] is inclusive This takes the tree lock. */ -int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, - int bits, int exclusive_bits, u64 *failed_start, - struct extent_state **cached_state, gfp_t mask) +static int __must_check +__set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, + int bits, int exclusive_bits, u64 *failed_start, + struct extent_state **cached_state, gfp_t mask) { struct extent_state *state; struct extent_state *prealloc = NULL; @@ -738,8 +760,10 @@ again: prealloc = alloc_extent_state_atomic(prealloc); BUG_ON(!prealloc); err = insert_state(tree, prealloc, start, end, &bits); + if (err) + extent_io_tree_panic(tree, err); + prealloc = NULL; - BUG_ON(err == -EEXIST); goto out; } state = rb_entry(node, struct extent_state, rb_node); @@ -805,7 +829,9 @@ hit_next: prealloc = alloc_extent_state_atomic(prealloc); BUG_ON(!prealloc); err = split_state(tree, state, prealloc, start); - BUG_ON(err == -EEXIST); + if (err) + extent_io_tree_panic(tree, err); + prealloc = NULL; if (err) goto out; @@ -842,12 +868,9 @@ hit_next: */ err = insert_state(tree, prealloc, start, this_end, &bits); - BUG_ON(err == -EEXIST); - if (err) { - free_extent_state(prealloc); - prealloc = NULL; - goto out; - } + if (err) + extent_io_tree_panic(tree, err); + cache_state(prealloc, cached_state); prealloc = NULL; start = this_end + 1; @@ -869,7 +892,8 @@ hit_next: prealloc = alloc_extent_state_atomic(prealloc); BUG_ON(!prealloc); err = split_state(tree, state, prealloc, end + 1); - BUG_ON(err == -EEXIST); + if (err) + extent_io_tree_panic(tree, err); set_state_bits(tree, prealloc, &bits); cache_state(prealloc, cached_state); @@ -896,6 +920,15 @@ search_again: goto again; } +int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits, + u64 *failed_start, struct extent_state **cached_state, + gfp_t mask) +{ + return __set_extent_bit(tree, start, end, bits, 0, failed_start, + cached_state, mask); +} + + /** * convert_extent - convert all bits in a given range from one bit to another * @tree: the io tree to search @@ -942,7 +975,8 @@ again: } err = insert_state(tree, prealloc, start, end, &bits); prealloc = NULL; - BUG_ON(err == -EEXIST); + if (err) + extent_io_tree_panic(tree, err); goto out; } state = rb_entry(node, struct extent_state, rb_node); @@ -961,8 +995,6 @@ hit_next: set_state_bits(tree, state, &bits); clear_state_bit(tree, state, &clear_bits, 0); - - merge_state(tree, state); if (last_end == (u64)-1) goto out; @@ -1000,14 +1032,14 @@ hit_next: goto out; } err = split_state(tree, state, prealloc, start); - BUG_ON(err == -EEXIST); + if (err) + extent_io_tree_panic(tree, err); prealloc = NULL; if (err) goto out; if (state->end <= end) { set_state_bits(tree, state, &bits); clear_state_bit(tree, state, &clear_bits, 0); - merge_state(tree, state); if (last_end == (u64)-1) goto out; start = last_end + 1; @@ -1040,12 +1072,8 @@ hit_next: */ err = insert_state(tree, prealloc, start, this_end, &bits); - BUG_ON(err == -EEXIST); - if (err) { - free_extent_state(prealloc); - prealloc = NULL; - goto out; - } + if (err) + extent_io_tree_panic(tree, err); prealloc = NULL; start = this_end + 1; goto search_again; @@ -1064,12 +1092,11 @@ hit_next: } err = split_state(tree, state, prealloc, end + 1); - BUG_ON(err == -EEXIST); + if (err) + extent_io_tree_panic(tree, err); set_state_bits(tree, prealloc, &bits); clear_state_bit(tree, prealloc, &clear_bits, 0); - - merge_state(tree, prealloc); prealloc = NULL; goto out; } @@ -1096,14 +1123,14 @@ search_again: int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask) { - return set_extent_bit(tree, start, end, EXTENT_DIRTY, 0, NULL, + return set_extent_bit(tree, start, end, EXTENT_DIRTY, NULL, NULL, mask); } int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, int bits, gfp_t mask) { - return set_extent_bit(tree, start, end, bits, 0, NULL, + return set_extent_bit(tree, start, end, bits, NULL, NULL, mask); } @@ -1118,7 +1145,7 @@ int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end, { return set_extent_bit(tree, start, end, EXTENT_DELALLOC | EXTENT_UPTODATE, - 0, NULL, cached_state, mask); + NULL, cached_state, mask); } int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, @@ -1132,7 +1159,7 @@ int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, int set_extent_new(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask) { - return set_extent_bit(tree, start, end, EXTENT_NEW, 0, NULL, + return set_extent_bit(tree, start, end, EXTENT_NEW, NULL, NULL, mask); } @@ -1140,7 +1167,7 @@ int set_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end, struct extent_state **cached_state, gfp_t mask) { return set_extent_bit(tree, start, end, EXTENT_UPTODATE, 0, - NULL, cached_state, mask); + cached_state, mask); } static int clear_extent_uptodate(struct extent_io_tree *tree, u64 start, @@ -1156,42 +1183,40 @@ static int clear_extent_uptodate(struct extent_io_tree *tree, u64 start, * us if waiting is desired. */ int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, - int bits, struct extent_state **cached_state, gfp_t mask) + int bits, struct extent_state **cached_state) { int err; u64 failed_start; while (1) { - err = set_extent_bit(tree, start, end, EXTENT_LOCKED | bits, - EXTENT_LOCKED, &failed_start, - cached_state, mask); - if (err == -EEXIST && (mask & __GFP_WAIT)) { + err = __set_extent_bit(tree, start, end, EXTENT_LOCKED | bits, + EXTENT_LOCKED, &failed_start, + cached_state, GFP_NOFS); + if (err == -EEXIST) { wait_extent_bit(tree, failed_start, end, EXTENT_LOCKED); start = failed_start; - } else { + } else break; - } WARN_ON(start > end); } return err; } -int lock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask) +int lock_extent(struct extent_io_tree *tree, u64 start, u64 end) { - return lock_extent_bits(tree, start, end, 0, NULL, mask); + return lock_extent_bits(tree, start, end, 0, NULL); } -int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end, - gfp_t mask) +int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end) { int err; u64 failed_start; - err = set_extent_bit(tree, start, end, EXTENT_LOCKED, EXTENT_LOCKED, - &failed_start, NULL, mask); + err = __set_extent_bit(tree, start, end, EXTENT_LOCKED, EXTENT_LOCKED, + &failed_start, NULL, GFP_NOFS); if (err == -EEXIST) { if (failed_start > start) clear_extent_bit(tree, start, failed_start - 1, - EXTENT_LOCKED, 1, 0, NULL, mask); + EXTENT_LOCKED, 1, 0, NULL, GFP_NOFS); return 0; } return 1; @@ -1204,10 +1229,10 @@ int unlock_extent_cached(struct extent_io_tree *tree, u64 start, u64 end, mask); } -int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask) +int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end) { return clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, NULL, - mask); + GFP_NOFS); } /* @@ -1221,7 +1246,7 @@ static int set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end) while (index <= end_index) { page = find_get_page(tree->mapping, index); - BUG_ON(!page); + BUG_ON(!page); /* Pages should be in the extent_io_tree */ set_page_writeback(page); page_cache_release(page); index++; @@ -1344,9 +1369,9 @@ out: return found; } -static noinline int __unlock_for_delalloc(struct inode *inode, - struct page *locked_page, - u64 start, u64 end) +static noinline void __unlock_for_delalloc(struct inode *inode, + struct page *locked_page, + u64 start, u64 end) { int ret; struct page *pages[16]; @@ -1356,7 +1381,7 @@ static noinline int __unlock_for_delalloc(struct inode *inode, int i; if (index == locked_page->index && end_index == index) - return 0; + return; while (nr_pages > 0) { ret = find_get_pages_contig(inode->i_mapping, index, @@ -1371,7 +1396,6 @@ static noinline int __unlock_for_delalloc(struct inode *inode, index += ret; cond_resched(); } - return 0; } static noinline int lock_delalloc_pages(struct inode *inode, @@ -1501,11 +1525,10 @@ again: goto out_failed; } } - BUG_ON(ret); + BUG_ON(ret); /* Only valid values are 0 and -EAGAIN */ /* step three, lock the state bits for the whole range */ - lock_extent_bits(tree, delalloc_start, delalloc_end, - 0, &cached_state, GFP_NOFS); + lock_extent_bits(tree, delalloc_start, delalloc_end, 0, &cached_state); /* then test to make sure it is all still delalloc */ ret = test_range_bit(tree, delalloc_start, delalloc_end, @@ -1762,39 +1785,34 @@ int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end, * helper function to set a given page up to date if all the * extents in the tree for that page are up to date */ -static int check_page_uptodate(struct extent_io_tree *tree, - struct page *page) +static void check_page_uptodate(struct extent_io_tree *tree, struct page *page) { u64 start = (u64)page->index << PAGE_CACHE_SHIFT; u64 end = start + PAGE_CACHE_SIZE - 1; if (test_range_bit(tree, start, end, EXTENT_UPTODATE, 1, NULL)) SetPageUptodate(page); - return 0; } /* * helper function to unlock a page if all the extents in the tree * for that page are unlocked */ -static int check_page_locked(struct extent_io_tree *tree, - struct page *page) +static void check_page_locked(struct extent_io_tree *tree, struct page *page) { u64 start = (u64)page->index << PAGE_CACHE_SHIFT; u64 end = start + PAGE_CACHE_SIZE - 1; if (!test_range_bit(tree, start, end, EXTENT_LOCKED, 0, NULL)) unlock_page(page); - return 0; } /* * helper function to end page writeback if all the extents * in the tree for that page are done with writeback */ -static int check_page_writeback(struct extent_io_tree *tree, - struct page *page) +static void check_page_writeback(struct extent_io_tree *tree, + struct page *page) { end_page_writeback(page); - return 0; } /* @@ -1913,6 +1931,26 @@ int repair_io_failure(struct btrfs_mapping_tree *map_tree, u64 start, return 0; } +int repair_eb_io_failure(struct btrfs_root *root, struct extent_buffer *eb, + int mirror_num) +{ + struct btrfs_mapping_tree *map_tree = &root->fs_info->mapping_tree; + u64 start = eb->start; + unsigned long i, num_pages = num_extent_pages(eb->start, eb->len); + int ret; + + for (i = 0; i < num_pages; i++) { + struct page *p = extent_buffer_page(eb, i); + ret = repair_io_failure(map_tree, start, PAGE_CACHE_SIZE, + start, p, mirror_num); + if (ret) + break; + start += PAGE_CACHE_SIZE; + } + + return ret; +} + /* * each time an IO finishes, we do a fast check in the IO failure tree * to see if we need to process or clean up an io_failure_record @@ -2154,13 +2192,46 @@ static int bio_readpage_error(struct bio *failed_bio, struct page *page, "this_mirror=%d, num_copies=%d, in_validation=%d\n", read_mode, failrec->this_mirror, num_copies, failrec->in_validation); - tree->ops->submit_bio_hook(inode, read_mode, bio, failrec->this_mirror, - failrec->bio_flags, 0); - return 0; + ret = tree->ops->submit_bio_hook(inode, read_mode, bio, + failrec->this_mirror, + failrec->bio_flags, 0); + return ret; } /* lots and lots of room for performance fixes in the end_bio funcs */ +int end_extent_writepage(struct page *page, int err, u64 start, u64 end) +{ + int uptodate = (err == 0); + struct extent_io_tree *tree; + int ret; + + tree = &BTRFS_I(page->mapping->host)->io_tree; + + if (tree->ops && tree->ops->writepage_end_io_hook) { + ret = tree->ops->writepage_end_io_hook(page, start, + end, NULL, uptodate); + if (ret) + uptodate = 0; + } + + if (!uptodate && tree->ops && + tree->ops->writepage_io_failed_hook) { + ret = tree->ops->writepage_io_failed_hook(NULL, page, + start, end, NULL); + /* Writeback already completed */ + if (ret == 0) + return 1; + } + + if (!uptodate) { + clear_extent_uptodate(tree, start, end, NULL, GFP_NOFS); + ClearPageUptodate(page); + SetPageError(page); + } + return 0; +} + /* * after a writepage IO is done, we need to: * clear the uptodate bits on error @@ -2172,13 +2243,11 @@ static int bio_readpage_error(struct bio *failed_bio, struct page *page, */ static void end_bio_extent_writepage(struct bio *bio, int err) { - int uptodate = err == 0; struct bio_vec *bvec = bio->bi_io_vec + bio->bi_vcnt - 1; struct extent_io_tree *tree; u64 start; u64 end; int whole_page; - int ret; do { struct page *page = bvec->bv_page; @@ -2195,28 +2264,9 @@ static void end_bio_extent_writepage(struct bio *bio, int err) if (--bvec >= bio->bi_io_vec) prefetchw(&bvec->bv_page->flags); - if (tree->ops && tree->ops->writepage_end_io_hook) { - ret = tree->ops->writepage_end_io_hook(page, start, - end, NULL, uptodate); - if (ret) - uptodate = 0; - } - - if (!uptodate && tree->ops && - tree->ops->writepage_io_failed_hook) { - ret = tree->ops->writepage_io_failed_hook(bio, page, - start, end, NULL); - if (ret == 0) { - uptodate = (err == 0); - continue; - } - } - if (!uptodate) { - clear_extent_uptodate(tree, start, end, NULL, GFP_NOFS); - ClearPageUptodate(page); - SetPageError(page); - } + if (end_extent_writepage(page, err, start, end)) + continue; if (whole_page) end_page_writeback(page); @@ -2247,6 +2297,7 @@ static void end_bio_extent_readpage(struct bio *bio, int err) u64 start; u64 end; int whole_page; + int failed_mirror; int ret; if (err) @@ -2293,9 +2344,16 @@ static void end_bio_extent_readpage(struct bio *bio, int err) else clean_io_failure(start, page); } - if (!uptodate) { - int failed_mirror; + + if (!uptodate) failed_mirror = (int)(unsigned long)bio->bi_bdev; + + if (!uptodate && tree->ops && tree->ops->readpage_io_failed_hook) { + ret = tree->ops->readpage_io_failed_hook(page, failed_mirror); + if (!ret && !err && + test_bit(BIO_UPTODATE, &bio->bi_flags)) + uptodate = 1; + } else if (!uptodate) { /* * The generic bio_readpage_error handles errors the * following way: If possible, new read requests are @@ -2309,7 +2367,6 @@ static void end_bio_extent_readpage(struct bio *bio, int err) ret = bio_readpage_error(bio, page, start, end, failed_mirror, NULL); if (ret == 0) { -error_handled: uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags); if (err) @@ -2317,16 +2374,9 @@ error_handled: uncache_state(&cached); continue; } - if (tree->ops && tree->ops->readpage_io_failed_hook) { - ret = tree->ops->readpage_io_failed_hook( - bio, page, start, end, - failed_mirror, state); - if (ret == 0) - goto error_handled; - } } - if (uptodate) { + if (uptodate && tree->track_uptodate) { set_extent_uptodate(tree, start, end, &cached, GFP_ATOMIC); } @@ -2375,8 +2425,12 @@ btrfs_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs, return bio; } -static int submit_one_bio(int rw, struct bio *bio, int mirror_num, - unsigned long bio_flags) +/* + * Since writes are async, they will only return -ENOMEM. + * Reads can return the full range of I/O error conditions. + */ +static int __must_check submit_one_bio(int rw, struct bio *bio, + int mirror_num, unsigned long bio_flags) { int ret = 0; struct bio_vec *bvec = bio->bi_io_vec + bio->bi_vcnt - 1; @@ -2402,6 +2456,19 @@ static int submit_one_bio(int rw, struct bio *bio, int mirror_num, return ret; } +static int merge_bio(struct extent_io_tree *tree, struct page *page, + unsigned long offset, size_t size, struct bio *bio, + unsigned long bio_flags) +{ + int ret = 0; + if (tree->ops && tree->ops->merge_bio_hook) + ret = tree->ops->merge_bio_hook(page, offset, size, bio, + bio_flags); + BUG_ON(ret < 0); + return ret; + +} + static int submit_extent_page(int rw, struct extent_io_tree *tree, struct page *page, sector_t sector, size_t size, unsigned long offset, @@ -2430,12 +2497,12 @@ static int submit_extent_page(int rw, struct extent_io_tree *tree, sector; if (prev_bio_flags != bio_flags || !contig || - (tree->ops && tree->ops->merge_bio_hook && - tree->ops->merge_bio_hook(page, offset, page_size, bio, - bio_flags)) || + merge_bio(tree, page, offset, page_size, bio, bio_flags) || bio_add_page(bio, page, page_size, offset) < page_size) { ret = submit_one_bio(rw, bio, mirror_num, prev_bio_flags); + if (ret < 0) + return ret; bio = NULL; } else { return 0; @@ -2462,25 +2529,31 @@ static int submit_extent_page(int rw, struct extent_io_tree *tree, return ret; } -void set_page_extent_mapped(struct page *page) +void attach_extent_buffer_page(struct extent_buffer *eb, struct page *page) { if (!PagePrivate(page)) { SetPagePrivate(page); page_cache_get(page); - set_page_private(page, EXTENT_PAGE_PRIVATE); + set_page_private(page, (unsigned long)eb); + } else { + WARN_ON(page->private != (unsigned long)eb); } } -static void set_page_extent_head(struct page *page, unsigned long len) +void set_page_extent_mapped(struct page *page) { - WARN_ON(!PagePrivate(page)); - set_page_private(page, EXTENT_PAGE_PRIVATE_FIRST_PAGE | len << 2); + if (!PagePrivate(page)) { + SetPagePrivate(page); + page_cache_get(page); + set_page_private(page, EXTENT_PAGE_PRIVATE); + } } /* * basic readpage implementation. Locked extent state structs are inserted * into the tree that are removed when the IO is done (by the end_io * handlers) + * XXX JDM: This needs looking at to ensure proper page locking */ static int __extent_read_full_page(struct extent_io_tree *tree, struct page *page, @@ -2520,11 +2593,11 @@ static int __extent_read_full_page(struct extent_io_tree *tree, end = page_end; while (1) { - lock_extent(tree, start, end, GFP_NOFS); + lock_extent(tree, start, end); ordered = btrfs_lookup_ordered_extent(inode, start); if (!ordered) break; - unlock_extent(tree, start, end, GFP_NOFS); + unlock_extent(tree, start, end); btrfs_start_ordered_extent(inode, ordered, 1); btrfs_put_ordered_extent(ordered); } @@ -2535,10 +2608,10 @@ static int __extent_read_full_page(struct extent_io_tree *tree, if (zero_offset) { iosize = PAGE_CACHE_SIZE - zero_offset; - userpage = kmap_atomic(page, KM_USER0); + userpage = kmap_atomic(page); memset(userpage + zero_offset, 0, iosize); flush_dcache_page(page); - kunmap_atomic(userpage, KM_USER0); + kunmap_atomic(userpage); } } while (cur <= end) { @@ -2547,10 +2620,10 @@ static int __extent_read_full_page(struct extent_io_tree *tree, struct extent_state *cached = NULL; iosize = PAGE_CACHE_SIZE - pg_offset; - userpage = kmap_atomic(page, KM_USER0); + userpage = kmap_atomic(page); memset(userpage + pg_offset, 0, iosize); flush_dcache_page(page); - kunmap_atomic(userpage, KM_USER0); + kunmap_atomic(userpage); set_extent_uptodate(tree, cur, cur + iosize - 1, &cached, GFP_NOFS); unlock_extent_cached(tree, cur, cur + iosize - 1, @@ -2561,7 +2634,7 @@ static int __extent_read_full_page(struct extent_io_tree *tree, end - cur + 1, 0); if (IS_ERR_OR_NULL(em)) { SetPageError(page); - unlock_extent(tree, cur, end, GFP_NOFS); + unlock_extent(tree, cur, end); break; } extent_offset = cur - em->start; @@ -2596,10 +2669,10 @@ static int __extent_read_full_page(struct extent_io_tree *tree, char *userpage; struct extent_state *cached = NULL; - userpage = kmap_atomic(page, KM_USER0); + userpage = kmap_atomic(page); memset(userpage + pg_offset, 0, iosize); flush_dcache_page(page); - kunmap_atomic(userpage, KM_USER0); + kunmap_atomic(userpage); set_extent_uptodate(tree, cur, cur + iosize - 1, &cached, GFP_NOFS); @@ -2613,7 +2686,7 @@ static int __extent_read_full_page(struct extent_io_tree *tree, if (test_range_bit(tree, cur, cur_end, EXTENT_UPTODATE, 1, NULL)) { check_page_uptodate(tree, page); - unlock_extent(tree, cur, cur + iosize - 1, GFP_NOFS); + unlock_extent(tree, cur, cur + iosize - 1); cur = cur + iosize; pg_offset += iosize; continue; @@ -2623,7 +2696,7 @@ static int __extent_read_full_page(struct extent_io_tree *tree, */ if (block_start == EXTENT_MAP_INLINE) { SetPageError(page); - unlock_extent(tree, cur, cur + iosize - 1, GFP_NOFS); + unlock_extent(tree, cur, cur + iosize - 1); cur = cur + iosize; pg_offset += iosize; continue; @@ -2643,6 +2716,7 @@ static int __extent_read_full_page(struct extent_io_tree *tree, end_bio_extent_readpage, mirror_num, *bio_flags, this_bio_flag); + BUG_ON(ret == -ENOMEM); nr++; *bio_flags = this_bio_flag; } @@ -2745,10 +2819,10 @@ static int __extent_writepage(struct page *page, struct writeback_control *wbc, if (page->index == end_index) { char *userpage; - userpage = kmap_atomic(page, KM_USER0); + userpage = kmap_atomic(page); memset(userpage + pg_offset, 0, PAGE_CACHE_SIZE - pg_offset); - kunmap_atomic(userpage, KM_USER0); + kunmap_atomic(userpage); flush_dcache_page(page); } pg_offset = 0; @@ -2779,9 +2853,16 @@ static int __extent_writepage(struct page *page, struct writeback_control *wbc, delalloc_start = delalloc_end + 1; continue; } - tree->ops->fill_delalloc(inode, page, delalloc_start, - delalloc_end, &page_started, - &nr_written); + ret = tree->ops->fill_delalloc(inode, page, + delalloc_start, + delalloc_end, + &page_started, + &nr_written); + /* File system has been set read-only */ + if (ret) { + SetPageError(page); + goto done; + } /* * delalloc_end is already one less than the total * length, so we don't subtract one from @@ -2818,8 +2899,12 @@ static int __extent_writepage(struct page *page, struct writeback_control *wbc, if (tree->ops && tree->ops->writepage_start_hook) { ret = tree->ops->writepage_start_hook(page, start, page_end); - if (ret == -EAGAIN) { - redirty_page_for_writepage(wbc, page); + if (ret) { + /* Fixup worker will requeue */ + if (ret == -EBUSY) + wbc->pages_skipped++; + else + redirty_page_for_writepage(wbc, page); update_nr_written(page, wbc, nr_written); unlock_page(page); ret = 0; @@ -2950,6 +3035,275 @@ done_unlocked: return 0; } +static int eb_wait(void *word) +{ + io_schedule(); + return 0; +} + +static void wait_on_extent_buffer_writeback(struct extent_buffer *eb) +{ + wait_on_bit(&eb->bflags, EXTENT_BUFFER_WRITEBACK, eb_wait, + TASK_UNINTERRUPTIBLE); +} + +static int lock_extent_buffer_for_io(struct extent_buffer *eb, + struct btrfs_fs_info *fs_info, + struct extent_page_data *epd) +{ + unsigned long i, num_pages; + int flush = 0; + int ret = 0; + + if (!btrfs_try_tree_write_lock(eb)) { + flush = 1; + flush_write_bio(epd); + btrfs_tree_lock(eb); + } + + if (test_bit(EXTENT_BUFFER_WRITEBACK, &eb->bflags)) { + btrfs_tree_unlock(eb); + if (!epd->sync_io) + return 0; + if (!flush) { + flush_write_bio(epd); + flush = 1; + } + while (1) { + wait_on_extent_buffer_writeback(eb); + btrfs_tree_lock(eb); + if (!test_bit(EXTENT_BUFFER_WRITEBACK, &eb->bflags)) + break; + btrfs_tree_unlock(eb); + } + } + + if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)) { + set_bit(EXTENT_BUFFER_WRITEBACK, &eb->bflags); + btrfs_set_header_flag(eb, BTRFS_HEADER_FLAG_WRITTEN); + spin_lock(&fs_info->delalloc_lock); + if (fs_info->dirty_metadata_bytes >= eb->len) + fs_info->dirty_metadata_bytes -= eb->len; + else + WARN_ON(1); + spin_unlock(&fs_info->delalloc_lock); + ret = 1; + } + + btrfs_tree_unlock(eb); + + if (!ret) + return ret; + + num_pages = num_extent_pages(eb->start, eb->len); + for (i = 0; i < num_pages; i++) { + struct page *p = extent_buffer_page(eb, i); + + if (!trylock_page(p)) { + if (!flush) { + flush_write_bio(epd); + flush = 1; + } + lock_page(p); + } + } + + return ret; +} + +static void end_extent_buffer_writeback(struct extent_buffer *eb) +{ + clear_bit(EXTENT_BUFFER_WRITEBACK, &eb->bflags); + smp_mb__after_clear_bit(); + wake_up_bit(&eb->bflags, EXTENT_BUFFER_WRITEBACK); +} + +static void end_bio_extent_buffer_writepage(struct bio *bio, int err) +{ + int uptodate = err == 0; + struct bio_vec *bvec = bio->bi_io_vec + bio->bi_vcnt - 1; + struct extent_buffer *eb; + int done; + + do { + struct page *page = bvec->bv_page; + + bvec--; + eb = (struct extent_buffer *)page->private; + BUG_ON(!eb); + done = atomic_dec_and_test(&eb->io_pages); + + if (!uptodate || test_bit(EXTENT_BUFFER_IOERR, &eb->bflags)) { + set_bit(EXTENT_BUFFER_IOERR, &eb->bflags); + ClearPageUptodate(page); + SetPageError(page); + } + + end_page_writeback(page); + + if (!done) + continue; + + end_extent_buffer_writeback(eb); + } while (bvec >= bio->bi_io_vec); + + bio_put(bio); + +} + +static int write_one_eb(struct extent_buffer *eb, + struct btrfs_fs_info *fs_info, + struct writeback_control *wbc, + struct extent_page_data *epd) +{ + struct block_device *bdev = fs_info->fs_devices->latest_bdev; + u64 offset = eb->start; + unsigned long i, num_pages; + int rw = (epd->sync_io ? WRITE_SYNC : WRITE); + int ret; + + clear_bit(EXTENT_BUFFER_IOERR, &eb->bflags); + num_pages = num_extent_pages(eb->start, eb->len); + atomic_set(&eb->io_pages, num_pages); + for (i = 0; i < num_pages; i++) { + struct page *p = extent_buffer_page(eb, i); + + clear_page_dirty_for_io(p); + set_page_writeback(p); + ret = submit_extent_page(rw, eb->tree, p, offset >> 9, + PAGE_CACHE_SIZE, 0, bdev, &epd->bio, + -1, end_bio_extent_buffer_writepage, + 0, 0, 0); + if (ret) { + set_bit(EXTENT_BUFFER_IOERR, &eb->bflags); + SetPageError(p); + if (atomic_sub_and_test(num_pages - i, &eb->io_pages)) + end_extent_buffer_writeback(eb); + ret = -EIO; + break; + } + offset += PAGE_CACHE_SIZE; + update_nr_written(p, wbc, 1); + unlock_page(p); + } + + if (unlikely(ret)) { + for (; i < num_pages; i++) { + struct page *p = extent_buffer_page(eb, i); + unlock_page(p); + } + } + + return ret; +} + +int btree_write_cache_pages(struct address_space *mapping, + struct writeback_control *wbc) +{ + struct extent_io_tree *tree = &BTRFS_I(mapping->host)->io_tree; + struct btrfs_fs_info *fs_info = BTRFS_I(mapping->host)->root->fs_info; + struct extent_buffer *eb, *prev_eb = NULL; + struct extent_page_data epd = { + .bio = NULL, + .tree = tree, + .extent_locked = 0, + .sync_io = wbc->sync_mode == WB_SYNC_ALL, + }; + int ret = 0; + int done = 0; + int nr_to_write_done = 0; + struct pagevec pvec; + int nr_pages; + pgoff_t index; + pgoff_t end; /* Inclusive */ + int scanned = 0; + int tag; + + pagevec_init(&pvec, 0); + if (wbc->range_cyclic) { + index = mapping->writeback_index; /* Start from prev offset */ + end = -1; + } else { + index = wbc->range_start >> PAGE_CACHE_SHIFT; + end = wbc->range_end >> PAGE_CACHE_SHIFT; + scanned = 1; + } + if (wbc->sync_mode == WB_SYNC_ALL) + tag = PAGECACHE_TAG_TOWRITE; + else + tag = PAGECACHE_TAG_DIRTY; +retry: + if (wbc->sync_mode == WB_SYNC_ALL) + tag_pages_for_writeback(mapping, index, end); + while (!done && !nr_to_write_done && (index <= end) && + (nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, tag, + min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1))) { + unsigned i; + + scanned = 1; + for (i = 0; i < nr_pages; i++) { + struct page *page = pvec.pages[i]; + + if (!PagePrivate(page)) + continue; + + if (!wbc->range_cyclic && page->index > end) { + done = 1; + break; + } + + eb = (struct extent_buffer *)page->private; + if (!eb) { + WARN_ON(1); + continue; + } + + if (eb == prev_eb) + continue; + + if (!atomic_inc_not_zero(&eb->refs)) { + WARN_ON(1); + continue; + } + + prev_eb = eb; + ret = lock_extent_buffer_for_io(eb, fs_info, &epd); + if (!ret) { + free_extent_buffer(eb); + continue; + } + + ret = write_one_eb(eb, fs_info, wbc, &epd); + if (ret) { + done = 1; + free_extent_buffer(eb); + break; + } + free_extent_buffer(eb); + + /* + * the filesystem may choose to bump up nr_to_write. + * We have to make sure to honor the new nr_to_write + * at any time + */ + nr_to_write_done = wbc->nr_to_write <= 0; + } + pagevec_release(&pvec); + cond_resched(); + } + if (!scanned && !done) { + /* + * We hit the last page and there is more work to be done: wrap + * back to the start of the file + */ + scanned = 1; + index = 0; + goto retry; + } + flush_write_bio(&epd); + return ret; +} + /** * write_cache_pages - walk the list of dirty pages of the given address space and write all of them. * @mapping: address space structure to write @@ -3081,10 +3435,14 @@ retry: static void flush_epd_write_bio(struct extent_page_data *epd) { if (epd->bio) { + int rw = WRITE; + int ret; + if (epd->sync_io) - submit_one_bio(WRITE_SYNC, epd->bio, 0, 0); - else - submit_one_bio(WRITE, epd->bio, 0, 0); + rw = WRITE_SYNC; + + ret = submit_one_bio(rw, epd->bio, 0, 0); + BUG_ON(ret < 0); /* -ENOMEM */ epd->bio = NULL; } } @@ -3201,7 +3559,7 @@ int extent_readpages(struct extent_io_tree *tree, } BUG_ON(!list_empty(pages)); if (bio) - submit_one_bio(READ, bio, 0, bio_flags); + return submit_one_bio(READ, bio, 0, bio_flags); return 0; } @@ -3222,7 +3580,7 @@ int extent_invalidatepage(struct extent_io_tree *tree, if (start > end) return 0; - lock_extent_bits(tree, start, end, 0, &cached_state, GFP_NOFS); + lock_extent_bits(tree, start, end, 0, &cached_state); wait_on_page_writeback(page); clear_extent_bit(tree, start, end, EXTENT_LOCKED | EXTENT_DIRTY | EXTENT_DELALLOC | @@ -3289,7 +3647,7 @@ int try_release_extent_mapping(struct extent_map_tree *map, len = end - start + 1; write_lock(&map->lock); em = lookup_extent_mapping(map, start, len); - if (IS_ERR_OR_NULL(em)) { + if (!em) { write_unlock(&map->lock); break; } @@ -3436,7 +3794,7 @@ int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, } lock_extent_bits(&BTRFS_I(inode)->io_tree, start, start + len, 0, - &cached_state, GFP_NOFS); + &cached_state); em = get_extent_skip_holes(inode, start, last_for_get_extent, get_extent); @@ -3530,26 +3888,7 @@ out: inline struct page *extent_buffer_page(struct extent_buffer *eb, unsigned long i) { - struct page *p; - struct address_space *mapping; - - if (i == 0) - return eb->first_page; - i += eb->start >> PAGE_CACHE_SHIFT; - mapping = eb->first_page->mapping; - if (!mapping) - return NULL; - - /* - * extent_buffer_page is only called after pinning the page - * by increasing the reference count. So we know the page must - * be in the radix tree. - */ - rcu_read_lock(); - p = radix_tree_lookup(&mapping->page_tree, i); - rcu_read_unlock(); - - return p; + return eb->pages[i]; } inline unsigned long num_extent_pages(u64 start, u64 len) @@ -3558,6 +3897,19 @@ inline unsigned long num_extent_pages(u64 start, u64 len) (start >> PAGE_CACHE_SHIFT); } +static void __free_extent_buffer(struct extent_buffer *eb) +{ +#if LEAK_DEBUG + unsigned long flags; + spin_lock_irqsave(&leak_lock, flags); + list_del(&eb->leak_list); + spin_unlock_irqrestore(&leak_lock, flags); +#endif + if (eb->pages && eb->pages != eb->inline_pages) + kfree(eb->pages); + kmem_cache_free(extent_buffer_cache, eb); +} + static struct extent_buffer *__alloc_extent_buffer(struct extent_io_tree *tree, u64 start, unsigned long len, @@ -3573,6 +3925,7 @@ static struct extent_buffer *__alloc_extent_buffer(struct extent_io_tree *tree, return NULL; eb->start = start; eb->len = len; + eb->tree = tree; rwlock_init(&eb->lock); atomic_set(&eb->write_locks, 0); atomic_set(&eb->read_locks, 0); @@ -3589,20 +3942,32 @@ static struct extent_buffer *__alloc_extent_buffer(struct extent_io_tree *tree, list_add(&eb->leak_list, &buffers); spin_unlock_irqrestore(&leak_lock, flags); #endif + spin_lock_init(&eb->refs_lock); atomic_set(&eb->refs, 1); + atomic_set(&eb->io_pages, 0); + + if (len > MAX_INLINE_EXTENT_BUFFER_SIZE) { + struct page **pages; + int num_pages = (len + PAGE_CACHE_SIZE - 1) >> + PAGE_CACHE_SHIFT; + pages = kzalloc(num_pages, mask); + if (!pages) { + __free_extent_buffer(eb); + return NULL; + } + eb->pages = pages; + } else { + eb->pages = eb->inline_pages; + } return eb; } -static void __free_extent_buffer(struct extent_buffer *eb) +static int extent_buffer_under_io(struct extent_buffer *eb) { -#if LEAK_DEBUG - unsigned long flags; - spin_lock_irqsave(&leak_lock, flags); - list_del(&eb->leak_list); - spin_unlock_irqrestore(&leak_lock, flags); -#endif - kmem_cache_free(extent_buffer_cache, eb); + return (atomic_read(&eb->io_pages) || + test_bit(EXTENT_BUFFER_WRITEBACK, &eb->bflags) || + test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)); } /* @@ -3614,8 +3979,7 @@ static void btrfs_release_extent_buffer_page(struct extent_buffer *eb, unsigned long index; struct page *page; - if (!eb->first_page) - return; + BUG_ON(extent_buffer_under_io(eb)); index = num_extent_pages(eb->start, eb->len); if (start_idx >= index) @@ -3624,8 +3988,34 @@ static void btrfs_release_extent_buffer_page(struct extent_buffer *eb, do { index--; page = extent_buffer_page(eb, index); - if (page) + if (page) { + spin_lock(&page->mapping->private_lock); + /* + * We do this since we'll remove the pages after we've + * removed the eb from the radix tree, so we could race + * and have this page now attached to the new eb. So + * only clear page_private if it's still connected to + * this eb. + */ + if (PagePrivate(page) && + page->private == (unsigned long)eb) { + BUG_ON(test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)); + BUG_ON(PageDirty(page)); + BUG_ON(PageWriteback(page)); + /* + * We need to make sure we haven't be attached + * to a new eb. + */ + ClearPagePrivate(page); + set_page_private(page, 0); + /* One for the page private */ + page_cache_release(page); + } + spin_unlock(&page->mapping->private_lock); + + /* One for when we alloced the page */ page_cache_release(page); + } } while (index != start_idx); } @@ -3638,9 +4028,50 @@ static inline void btrfs_release_extent_buffer(struct extent_buffer *eb) __free_extent_buffer(eb); } +static void check_buffer_tree_ref(struct extent_buffer *eb) +{ + /* the ref bit is tricky. We have to make sure it is set + * if we have the buffer dirty. Otherwise the + * code to free a buffer can end up dropping a dirty + * page + * + * Once the ref bit is set, it won't go away while the + * buffer is dirty or in writeback, and it also won't + * go away while we have the reference count on the + * eb bumped. + * + * We can't just set the ref bit without bumping the + * ref on the eb because free_extent_buffer might + * see the ref bit and try to clear it. If this happens + * free_extent_buffer might end up dropping our original + * ref by mistake and freeing the page before we are able + * to add one more ref. + * + * So bump the ref count first, then set the bit. If someone + * beat us to it, drop the ref we added. + */ + if (!test_bit(EXTENT_BUFFER_TREE_REF, &eb->bflags)) { + atomic_inc(&eb->refs); + if (test_and_set_bit(EXTENT_BUFFER_TREE_REF, &eb->bflags)) + atomic_dec(&eb->refs); + } +} + +static void mark_extent_buffer_accessed(struct extent_buffer *eb) +{ + unsigned long num_pages, i; + + check_buffer_tree_ref(eb); + + num_pages = num_extent_pages(eb->start, eb->len); + for (i = 0; i < num_pages; i++) { + struct page *p = extent_buffer_page(eb, i); + mark_page_accessed(p); + } +} + struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree, - u64 start, unsigned long len, - struct page *page0) + u64 start, unsigned long len) { unsigned long num_pages = num_extent_pages(start, len); unsigned long i; @@ -3656,7 +4087,7 @@ struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree, eb = radix_tree_lookup(&tree->buffer, start >> PAGE_CACHE_SHIFT); if (eb && atomic_inc_not_zero(&eb->refs)) { rcu_read_unlock(); - mark_page_accessed(eb->first_page); + mark_extent_buffer_accessed(eb); return eb; } rcu_read_unlock(); @@ -3665,32 +4096,43 @@ struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree, if (!eb) return NULL; - if (page0) { - eb->first_page = page0; - i = 1; - index++; - page_cache_get(page0); - mark_page_accessed(page0); - set_page_extent_mapped(page0); - set_page_extent_head(page0, len); - uptodate = PageUptodate(page0); - } else { - i = 0; - } - for (; i < num_pages; i++, index++) { + for (i = 0; i < num_pages; i++, index++) { p = find_or_create_page(mapping, index, GFP_NOFS); if (!p) { WARN_ON(1); goto free_eb; } - set_page_extent_mapped(p); - mark_page_accessed(p); - if (i == 0) { - eb->first_page = p; - set_page_extent_head(p, len); - } else { - set_page_private(p, EXTENT_PAGE_PRIVATE); + + spin_lock(&mapping->private_lock); + if (PagePrivate(p)) { + /* + * We could have already allocated an eb for this page + * and attached one so lets see if we can get a ref on + * the existing eb, and if we can we know it's good and + * we can just return that one, else we know we can just + * overwrite page->private. + */ + exists = (struct extent_buffer *)p->private; + if (atomic_inc_not_zero(&exists->refs)) { + spin_unlock(&mapping->private_lock); + unlock_page(p); + mark_extent_buffer_accessed(exists); + goto free_eb; + } + + /* + * Do this so attach doesn't complain and we need to + * drop the ref the old guy had. + */ + ClearPagePrivate(p); + WARN_ON(PageDirty(p)); + page_cache_release(p); } + attach_extent_buffer_page(eb, p); + spin_unlock(&mapping->private_lock); + WARN_ON(PageDirty(p)); + mark_page_accessed(p); + eb->pages[i] = p; if (!PageUptodate(p)) uptodate = 0; @@ -3698,12 +4140,10 @@ struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree, * see below about how we avoid a nasty race with release page * and why we unlock later */ - if (i != 0) - unlock_page(p); } if (uptodate) set_bit(EXTENT_BUFFER_UPTODATE, &eb->bflags); - +again: ret = radix_tree_preload(GFP_NOFS & ~__GFP_HIGHMEM); if (ret) goto free_eb; @@ -3713,14 +4153,21 @@ struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree, if (ret == -EEXIST) { exists = radix_tree_lookup(&tree->buffer, start >> PAGE_CACHE_SHIFT); - /* add one reference for the caller */ - atomic_inc(&exists->refs); + if (!atomic_inc_not_zero(&exists->refs)) { + spin_unlock(&tree->buffer_lock); + radix_tree_preload_end(); + exists = NULL; + goto again; + } spin_unlock(&tree->buffer_lock); radix_tree_preload_end(); + mark_extent_buffer_accessed(exists); goto free_eb; } /* add one reference for the tree */ - atomic_inc(&eb->refs); + spin_lock(&eb->refs_lock); + check_buffer_tree_ref(eb); + spin_unlock(&eb->refs_lock); spin_unlock(&tree->buffer_lock); radix_tree_preload_end(); @@ -3733,15 +4180,20 @@ struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree, * after the extent buffer is in the radix tree so * it doesn't get lost */ - set_page_extent_mapped(eb->first_page); - set_page_extent_head(eb->first_page, eb->len); - if (!page0) - unlock_page(eb->first_page); + SetPageChecked(eb->pages[0]); + for (i = 1; i < num_pages; i++) { + p = extent_buffer_page(eb, i); + ClearPageChecked(p); + unlock_page(p); + } + unlock_page(eb->pages[0]); return eb; free_eb: - if (eb->first_page && !page0) - unlock_page(eb->first_page); + for (i = 0; i < num_pages; i++) { + if (eb->pages[i]) + unlock_page(eb->pages[i]); + } if (!atomic_dec_and_test(&eb->refs)) return exists; @@ -3758,7 +4210,7 @@ struct extent_buffer *find_extent_buffer(struct extent_io_tree *tree, eb = radix_tree_lookup(&tree->buffer, start >> PAGE_CACHE_SHIFT); if (eb && atomic_inc_not_zero(&eb->refs)) { rcu_read_unlock(); - mark_page_accessed(eb->first_page); + mark_extent_buffer_accessed(eb); return eb; } rcu_read_unlock(); @@ -3766,19 +4218,71 @@ struct extent_buffer *find_extent_buffer(struct extent_io_tree *tree, return NULL; } +static inline void btrfs_release_extent_buffer_rcu(struct rcu_head *head) +{ + struct extent_buffer *eb = + container_of(head, struct extent_buffer, rcu_head); + + __free_extent_buffer(eb); +} + +/* Expects to have eb->eb_lock already held */ +static void release_extent_buffer(struct extent_buffer *eb, gfp_t mask) +{ + WARN_ON(atomic_read(&eb->refs) == 0); + if (atomic_dec_and_test(&eb->refs)) { + struct extent_io_tree *tree = eb->tree; + + spin_unlock(&eb->refs_lock); + + spin_lock(&tree->buffer_lock); + radix_tree_delete(&tree->buffer, + eb->start >> PAGE_CACHE_SHIFT); + spin_unlock(&tree->buffer_lock); + + /* Should be safe to release our pages at this point */ + btrfs_release_extent_buffer_page(eb, 0); + + call_rcu(&eb->rcu_head, btrfs_release_extent_buffer_rcu); + return; + } + spin_unlock(&eb->refs_lock); +} + void free_extent_buffer(struct extent_buffer *eb) { if (!eb) return; - if (!atomic_dec_and_test(&eb->refs)) + spin_lock(&eb->refs_lock); + if (atomic_read(&eb->refs) == 2 && + test_bit(EXTENT_BUFFER_STALE, &eb->bflags) && + !extent_buffer_under_io(eb) && + test_and_clear_bit(EXTENT_BUFFER_TREE_REF, &eb->bflags)) + atomic_dec(&eb->refs); + + /* + * I know this is terrible, but it's temporary until we stop tracking + * the uptodate bits and such for the extent buffers. + */ + release_extent_buffer(eb, GFP_ATOMIC); +} + +void free_extent_buffer_stale(struct extent_buffer *eb) +{ + if (!eb) return; - WARN_ON(1); + spin_lock(&eb->refs_lock); + set_bit(EXTENT_BUFFER_STALE, &eb->bflags); + + if (atomic_read(&eb->refs) == 2 && !extent_buffer_under_io(eb) && + test_and_clear_bit(EXTENT_BUFFER_TREE_REF, &eb->bflags)) + atomic_dec(&eb->refs); + release_extent_buffer(eb, GFP_NOFS); } -int clear_extent_buffer_dirty(struct extent_io_tree *tree, - struct extent_buffer *eb) +void clear_extent_buffer_dirty(struct extent_buffer *eb) { unsigned long i; unsigned long num_pages; @@ -3794,10 +4298,6 @@ int clear_extent_buffer_dirty(struct extent_io_tree *tree, lock_page(page); WARN_ON(!PagePrivate(page)); - set_page_extent_mapped(page); - if (i == 0) - set_page_extent_head(page, eb->len); - clear_page_dirty_for_io(page); spin_lock_irq(&page->mapping->tree_lock); if (!PageDirty(page)) { @@ -3809,24 +4309,29 @@ int clear_extent_buffer_dirty(struct extent_io_tree *tree, ClearPageError(page); unlock_page(page); } - return 0; + WARN_ON(atomic_read(&eb->refs) == 0); } -int set_extent_buffer_dirty(struct extent_io_tree *tree, - struct extent_buffer *eb) +int set_extent_buffer_dirty(struct extent_buffer *eb) { unsigned long i; unsigned long num_pages; int was_dirty = 0; + check_buffer_tree_ref(eb); + was_dirty = test_and_set_bit(EXTENT_BUFFER_DIRTY, &eb->bflags); + num_pages = num_extent_pages(eb->start, eb->len); + WARN_ON(atomic_read(&eb->refs) == 0); + WARN_ON(!test_bit(EXTENT_BUFFER_TREE_REF, &eb->bflags)); + for (i = 0; i < num_pages; i++) - __set_page_dirty_nobuffers(extent_buffer_page(eb, i)); + set_page_dirty(extent_buffer_page(eb, i)); return was_dirty; } -static int __eb_straddles_pages(u64 start, u64 len) +static int range_straddles_pages(u64 start, u64 len) { if (len < PAGE_CACHE_SIZE) return 1; @@ -3837,26 +4342,14 @@ static int __eb_straddles_pages(u64 start, u64 len) return 0; } -static int eb_straddles_pages(struct extent_buffer *eb) -{ - return __eb_straddles_pages(eb->start, eb->len); -} - -int clear_extent_buffer_uptodate(struct extent_io_tree *tree, - struct extent_buffer *eb, - struct extent_state **cached_state) +int clear_extent_buffer_uptodate(struct extent_buffer *eb) { unsigned long i; struct page *page; unsigned long num_pages; - num_pages = num_extent_pages(eb->start, eb->len); clear_bit(EXTENT_BUFFER_UPTODATE, &eb->bflags); - - if (eb_straddles_pages(eb)) { - clear_extent_uptodate(tree, eb->start, eb->start + eb->len - 1, - cached_state, GFP_NOFS); - } + num_pages = num_extent_pages(eb->start, eb->len); for (i = 0; i < num_pages; i++) { page = extent_buffer_page(eb, i); if (page) @@ -3865,27 +4358,16 @@ int clear_extent_buffer_uptodate(struct extent_io_tree *tree, return 0; } -int set_extent_buffer_uptodate(struct extent_io_tree *tree, - struct extent_buffer *eb) +int set_extent_buffer_uptodate(struct extent_buffer *eb) { unsigned long i; struct page *page; unsigned long num_pages; + set_bit(EXTENT_BUFFER_UPTODATE, &eb->bflags); num_pages = num_extent_pages(eb->start, eb->len); - - if (eb_straddles_pages(eb)) { - set_extent_uptodate(tree, eb->start, eb->start + eb->len - 1, - NULL, GFP_NOFS); - } for (i = 0; i < num_pages; i++) { page = extent_buffer_page(eb, i); - if ((i == 0 && (eb->start & (PAGE_CACHE_SIZE - 1))) || - ((i == num_pages - 1) && - ((eb->start + eb->len) & (PAGE_CACHE_SIZE - 1)))) { - check_page_uptodate(tree, page); - continue; - } SetPageUptodate(page); } return 0; @@ -3900,7 +4382,7 @@ int extent_range_uptodate(struct extent_io_tree *tree, int uptodate; unsigned long index; - if (__eb_straddles_pages(start, end - start + 1)) { + if (range_straddles_pages(start, end - start + 1)) { ret = test_range_bit(tree, start, end, EXTENT_UPTODATE, 1, NULL); if (ret) @@ -3922,35 +4404,9 @@ int extent_range_uptodate(struct extent_io_tree *tree, return pg_uptodate; } -int extent_buffer_uptodate(struct extent_io_tree *tree, - struct extent_buffer *eb, - struct extent_state *cached_state) +int extent_buffer_uptodate(struct extent_buffer *eb) { - int ret = 0; - unsigned long num_pages; - unsigned long i; - struct page *page; - int pg_uptodate = 1; - - if (test_bit(EXTENT_BUFFER_UPTODATE, &eb->bflags)) - return 1; - - if (eb_straddles_pages(eb)) { - ret = test_range_bit(tree, eb->start, eb->start + eb->len - 1, - EXTENT_UPTODATE, 1, cached_state); - if (ret) - return ret; - } - - num_pages = num_extent_pages(eb->start, eb->len); - for (i = 0; i < num_pages; i++) { - page = extent_buffer_page(eb, i); - if (!PageUptodate(page)) { - pg_uptodate = 0; - break; - } - } - return pg_uptodate; + return test_bit(EXTENT_BUFFER_UPTODATE, &eb->bflags); } int read_extent_buffer_pages(struct extent_io_tree *tree, @@ -3964,21 +4420,14 @@ int read_extent_buffer_pages(struct extent_io_tree *tree, int ret = 0; int locked_pages = 0; int all_uptodate = 1; - int inc_all_pages = 0; unsigned long num_pages; + unsigned long num_reads = 0; struct bio *bio = NULL; unsigned long bio_flags = 0; if (test_bit(EXTENT_BUFFER_UPTODATE, &eb->bflags)) return 0; - if (eb_straddles_pages(eb)) { - if (test_range_bit(tree, eb->start, eb->start + eb->len - 1, - EXTENT_UPTODATE, 1, NULL)) { - return 0; - } - } - if (start) { WARN_ON(start < eb->start); start_i = (start >> PAGE_CACHE_SHIFT) - @@ -3997,8 +4446,10 @@ int read_extent_buffer_pages(struct extent_io_tree *tree, lock_page(page); } locked_pages++; - if (!PageUptodate(page)) + if (!PageUptodate(page)) { + num_reads++; all_uptodate = 0; + } } if (all_uptodate) { if (start_i == 0) @@ -4006,20 +4457,12 @@ int read_extent_buffer_pages(struct extent_io_tree *tree, goto unlock_exit; } + clear_bit(EXTENT_BUFFER_IOERR, &eb->bflags); + eb->failed_mirror = 0; + atomic_set(&eb->io_pages, num_reads); for (i = start_i; i < num_pages; i++) { page = extent_buffer_page(eb, i); - - WARN_ON(!PagePrivate(page)); - - set_page_extent_mapped(page); - if (i == 0) - set_page_extent_head(page, eb->len); - - if (inc_all_pages) - page_cache_get(page); if (!PageUptodate(page)) { - if (start_i == 0) - inc_all_pages = 1; ClearPageError(page); err = __extent_read_full_page(tree, page, get_extent, &bio, @@ -4031,8 +4474,11 @@ int read_extent_buffer_pages(struct extent_io_tree *tree, } } - if (bio) - submit_one_bio(READ, bio, mirror_num, bio_flags); + if (bio) { + err = submit_one_bio(READ, bio, mirror_num, bio_flags); + if (err) + return err; + } if (ret || wait != WAIT_COMPLETE) return ret; @@ -4044,8 +4490,6 @@ int read_extent_buffer_pages(struct extent_io_tree *tree, ret = -EIO; } - if (!ret) - set_bit(EXTENT_BUFFER_UPTODATE, &eb->bflags); return ret; unlock_exit: @@ -4287,15 +4731,20 @@ static void copy_pages(struct page *dst_page, struct page *src_page, { char *dst_kaddr = page_address(dst_page); char *src_kaddr; + int must_memmove = 0; if (dst_page != src_page) { src_kaddr = page_address(src_page); } else { src_kaddr = dst_kaddr; - BUG_ON(areas_overlap(src_off, dst_off, len)); + if (areas_overlap(src_off, dst_off, len)) + must_memmove = 1; } - memcpy(dst_kaddr + dst_off, src_kaddr + src_off, len); + if (must_memmove) + memmove(dst_kaddr + dst_off, src_kaddr + src_off, len); + else + memcpy(dst_kaddr + dst_off, src_kaddr + src_off, len); } void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, @@ -4365,7 +4814,7 @@ void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, "len %lu len %lu\n", dst_offset, len, dst->len); BUG_ON(1); } - if (!areas_overlap(src_offset, dst_offset, len)) { + if (dst_offset < src_offset) { memcpy_extent_buffer(dst, dst_offset, src_offset, len); return; } @@ -4391,47 +4840,48 @@ void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, } } -static inline void btrfs_release_extent_buffer_rcu(struct rcu_head *head) +int try_release_extent_buffer(struct page *page, gfp_t mask) { - struct extent_buffer *eb = - container_of(head, struct extent_buffer, rcu_head); - - btrfs_release_extent_buffer(eb); -} - -int try_release_extent_buffer(struct extent_io_tree *tree, struct page *page) -{ - u64 start = page_offset(page); struct extent_buffer *eb; - int ret = 1; - spin_lock(&tree->buffer_lock); - eb = radix_tree_lookup(&tree->buffer, start >> PAGE_CACHE_SHIFT); - if (!eb) { - spin_unlock(&tree->buffer_lock); - return ret; + /* + * We need to make sure noboody is attaching this page to an eb right + * now. + */ + spin_lock(&page->mapping->private_lock); + if (!PagePrivate(page)) { + spin_unlock(&page->mapping->private_lock); + return 1; } - if (test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)) { - ret = 0; - goto out; - } + eb = (struct extent_buffer *)page->private; + BUG_ON(!eb); /* - * set @eb->refs to 0 if it is already 1, and then release the @eb. - * Or go back. + * This is a little awful but should be ok, we need to make sure that + * the eb doesn't disappear out from under us while we're looking at + * this page. */ - if (atomic_cmpxchg(&eb->refs, 1, 0) != 1) { - ret = 0; - goto out; + spin_lock(&eb->refs_lock); + if (atomic_read(&eb->refs) != 1 || extent_buffer_under_io(eb)) { + spin_unlock(&eb->refs_lock); + spin_unlock(&page->mapping->private_lock); + return 0; } + spin_unlock(&page->mapping->private_lock); - radix_tree_delete(&tree->buffer, start >> PAGE_CACHE_SHIFT); -out: - spin_unlock(&tree->buffer_lock); + if ((mask & GFP_NOFS) == GFP_NOFS) + mask = GFP_NOFS; - /* at this point we can safely release the extent buffer */ - if (atomic_read(&eb->refs) == 0) - call_rcu(&eb->rcu_head, btrfs_release_extent_buffer_rcu); - return ret; + /* + * If tree ref isn't set then we know the ref on this eb is a real ref, + * so just return, this page will likely be freed soon anyway. + */ + if (!test_and_clear_bit(EXTENT_BUFFER_TREE_REF, &eb->bflags)) { + spin_unlock(&eb->refs_lock); + return 0; + } + release_extent_buffer(eb, mask); + + return 1; } diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h index bc6a042cb..faf10eb5 100644 --- a/fs/btrfs/extent_io.h +++ b/fs/btrfs/extent_io.h @@ -35,6 +35,10 @@ #define EXTENT_BUFFER_DIRTY 2 #define EXTENT_BUFFER_CORRUPT 3 #define EXTENT_BUFFER_READAHEAD 4 /* this got triggered by readahead */ +#define EXTENT_BUFFER_TREE_REF 5 +#define EXTENT_BUFFER_STALE 6 +#define EXTENT_BUFFER_WRITEBACK 7 +#define EXTENT_BUFFER_IOERR 8 /* these are flags for extent_clear_unlock_delalloc */ #define EXTENT_CLEAR_UNLOCK_PAGE 0x1 @@ -54,6 +58,7 @@ #define EXTENT_PAGE_PRIVATE_FIRST_PAGE 3 struct extent_state; +struct btrfs_root; typedef int (extent_submit_bio_hook_t)(struct inode *inode, int rw, struct bio *bio, int mirror_num, @@ -69,9 +74,7 @@ struct extent_io_ops { size_t size, struct bio *bio, unsigned long bio_flags); int (*readpage_io_hook)(struct page *page, u64 start, u64 end); - int (*readpage_io_failed_hook)(struct bio *bio, struct page *page, - u64 start, u64 end, int failed_mirror, - struct extent_state *state); + int (*readpage_io_failed_hook)(struct page *page, int failed_mirror); int (*writepage_io_failed_hook)(struct bio *bio, struct page *page, u64 start, u64 end, struct extent_state *state); @@ -97,6 +100,7 @@ struct extent_io_tree { struct radix_tree_root buffer; struct address_space *mapping; u64 dirty_bytes; + int track_uptodate; spinlock_t lock; spinlock_t buffer_lock; struct extent_io_ops *ops; @@ -119,16 +123,21 @@ struct extent_state { struct list_head leak_list; }; +#define INLINE_EXTENT_BUFFER_PAGES 16 +#define MAX_INLINE_EXTENT_BUFFER_SIZE (INLINE_EXTENT_BUFFER_PAGES * PAGE_CACHE_SIZE) struct extent_buffer { u64 start; unsigned long len; unsigned long map_start; unsigned long map_len; - struct page *first_page; unsigned long bflags; + struct extent_io_tree *tree; + spinlock_t refs_lock; + atomic_t refs; + atomic_t io_pages; + int failed_mirror; struct list_head leak_list; struct rcu_head rcu_head; - atomic_t refs; pid_t lock_owner; /* count of read lock holders on the extent buffer */ @@ -152,6 +161,9 @@ struct extent_buffer { * to unlock */ wait_queue_head_t read_lock_wq; + wait_queue_head_t lock_wq; + struct page *inline_pages[INLINE_EXTENT_BUFFER_PAGES]; + struct page **pages; }; static inline void extent_set_compress_type(unsigned long *bio_flags, @@ -178,18 +190,17 @@ void extent_io_tree_init(struct extent_io_tree *tree, int try_release_extent_mapping(struct extent_map_tree *map, struct extent_io_tree *tree, struct page *page, gfp_t mask); -int try_release_extent_buffer(struct extent_io_tree *tree, struct page *page); +int try_release_extent_buffer(struct page *page, gfp_t mask); int try_release_extent_state(struct extent_map_tree *map, struct extent_io_tree *tree, struct page *page, gfp_t mask); -int lock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask); +int lock_extent(struct extent_io_tree *tree, u64 start, u64 end); int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, - int bits, struct extent_state **cached, gfp_t mask); -int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask); + int bits, struct extent_state **cached); +int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end); int unlock_extent_cached(struct extent_io_tree *tree, u64 start, u64 end, struct extent_state **cached, gfp_t mask); -int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end, - gfp_t mask); +int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end); int extent_read_full_page(struct extent_io_tree *tree, struct page *page, get_extent_t *get_extent, int mirror_num); int __init extent_io_init(void); @@ -210,7 +221,7 @@ int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, int bits, gfp_t mask); int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, - int bits, int exclusive_bits, u64 *failed_start, + int bits, u64 *failed_start, struct extent_state **cached_state, gfp_t mask); int set_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end, struct extent_state **cached_state, gfp_t mask); @@ -240,6 +251,8 @@ int extent_writepages(struct extent_io_tree *tree, struct address_space *mapping, get_extent_t *get_extent, struct writeback_control *wbc); +int btree_write_cache_pages(struct address_space *mapping, + struct writeback_control *wbc); int extent_readpages(struct extent_io_tree *tree, struct address_space *mapping, struct list_head *pages, unsigned nr_pages, @@ -251,11 +264,11 @@ int get_state_private(struct extent_io_tree *tree, u64 start, u64 *private); void set_page_extent_mapped(struct page *page); struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree, - u64 start, unsigned long len, - struct page *page0); + u64 start, unsigned long len); struct extent_buffer *find_extent_buffer(struct extent_io_tree *tree, u64 start, unsigned long len); void free_extent_buffer(struct extent_buffer *eb); +void free_extent_buffer_stale(struct extent_buffer *eb); #define WAIT_NONE 0 #define WAIT_COMPLETE 1 #define WAIT_PAGE_LOCK 2 @@ -287,19 +300,12 @@ void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, unsigned long src_offset, unsigned long len); void memset_extent_buffer(struct extent_buffer *eb, char c, unsigned long start, unsigned long len); -int wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits); -int clear_extent_buffer_dirty(struct extent_io_tree *tree, - struct extent_buffer *eb); -int set_extent_buffer_dirty(struct extent_io_tree *tree, - struct extent_buffer *eb); -int set_extent_buffer_uptodate(struct extent_io_tree *tree, - struct extent_buffer *eb); -int clear_extent_buffer_uptodate(struct extent_io_tree *tree, - struct extent_buffer *eb, - struct extent_state **cached_state); -int extent_buffer_uptodate(struct extent_io_tree *tree, - struct extent_buffer *eb, - struct extent_state *cached_state); +void wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits); +void clear_extent_buffer_dirty(struct extent_buffer *eb); +int set_extent_buffer_dirty(struct extent_buffer *eb); +int set_extent_buffer_uptodate(struct extent_buffer *eb); +int clear_extent_buffer_uptodate(struct extent_buffer *eb); +int extent_buffer_uptodate(struct extent_buffer *eb); int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset, unsigned long min_len, char **map, unsigned long *map_start, @@ -319,4 +325,7 @@ struct btrfs_mapping_tree; int repair_io_failure(struct btrfs_mapping_tree *map_tree, u64 start, u64 length, u64 logical, struct page *page, int mirror_num); +int end_extent_writepage(struct page *page, int err, u64 start, u64 end); +int repair_eb_io_failure(struct btrfs_root *root, struct extent_buffer *eb, + int mirror_num); #endif diff --git a/fs/btrfs/extent_map.h b/fs/btrfs/extent_map.h index 33a7890..1195f09 100644 --- a/fs/btrfs/extent_map.h +++ b/fs/btrfs/extent_map.h @@ -26,8 +26,8 @@ struct extent_map { unsigned long flags; struct block_device *bdev; atomic_t refs; - unsigned int in_tree:1; - unsigned int compress_type:4; + unsigned int in_tree; + unsigned int compress_type; }; struct extent_map_tree { diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c index c7fb3a4..5d158d3 100644 --- a/fs/btrfs/file-item.c +++ b/fs/btrfs/file-item.c @@ -25,10 +25,12 @@ #include "transaction.h" #include "print-tree.h" -#define MAX_CSUM_ITEMS(r, size) ((((BTRFS_LEAF_DATA_SIZE(r) - \ +#define __MAX_CSUM_ITEMS(r, size) ((((BTRFS_LEAF_DATA_SIZE(r) - \ sizeof(struct btrfs_item) * 2) / \ size) - 1)) +#define MAX_CSUM_ITEMS(r, size) (min(__MAX_CSUM_ITEMS(r, size), PAGE_CACHE_SIZE)) + #define MAX_ORDERED_SUM_BYTES(r) ((PAGE_SIZE - \ sizeof(struct btrfs_ordered_sum)) / \ sizeof(struct btrfs_sector_sum) * \ @@ -59,7 +61,7 @@ int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, sizeof(*item)); if (ret < 0) goto out; - BUG_ON(ret); + BUG_ON(ret); /* Can't happen */ leaf = path->nodes[0]; item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_file_extent_item); @@ -284,6 +286,7 @@ int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, struct btrfs_ordered_sum *sums; struct btrfs_sector_sum *sector_sum; struct btrfs_csum_item *item; + LIST_HEAD(tmplist); unsigned long offset; int ret; size_t size; @@ -358,7 +361,10 @@ int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, MAX_ORDERED_SUM_BYTES(root)); sums = kzalloc(btrfs_ordered_sum_size(root, size), GFP_NOFS); - BUG_ON(!sums); + if (!sums) { + ret = -ENOMEM; + goto fail; + } sector_sum = sums->sums; sums->bytenr = start; @@ -380,12 +386,19 @@ int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, offset += csum_size; sector_sum++; } - list_add_tail(&sums->list, list); + list_add_tail(&sums->list, &tmplist); } path->slots[0]++; } ret = 0; fail: + while (ret < 0 && !list_empty(&tmplist)) { + sums = list_entry(&tmplist, struct btrfs_ordered_sum, list); + list_del(&sums->list); + kfree(sums); + } + list_splice_tail(&tmplist, list); + btrfs_free_path(path); return ret; } @@ -420,7 +433,7 @@ int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode, offset = page_offset(bvec->bv_page) + bvec->bv_offset; ordered = btrfs_lookup_ordered_extent(inode, offset); - BUG_ON(!ordered); + BUG_ON(!ordered); /* Logic error */ sums->bytenr = ordered->start; while (bio_index < bio->bi_vcnt) { @@ -439,21 +452,21 @@ int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode, sums = kzalloc(btrfs_ordered_sum_size(root, bytes_left), GFP_NOFS); - BUG_ON(!sums); + BUG_ON(!sums); /* -ENOMEM */ sector_sum = sums->sums; sums->len = bytes_left; ordered = btrfs_lookup_ordered_extent(inode, offset); - BUG_ON(!ordered); + BUG_ON(!ordered); /* Logic error */ sums->bytenr = ordered->start; } - data = kmap_atomic(bvec->bv_page, KM_USER0); + data = kmap_atomic(bvec->bv_page); sector_sum->sum = ~(u32)0; sector_sum->sum = btrfs_csum_data(root, data + bvec->bv_offset, sector_sum->sum, bvec->bv_len); - kunmap_atomic(data, KM_USER0); + kunmap_atomic(data); btrfs_csum_final(sector_sum->sum, (char *)§or_sum->sum); sector_sum->bytenr = disk_bytenr; @@ -483,18 +496,17 @@ int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode, * This calls btrfs_truncate_item with the correct args based on the * overlap, and fixes up the key as required. */ -static noinline int truncate_one_csum(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - struct btrfs_path *path, - struct btrfs_key *key, - u64 bytenr, u64 len) +static noinline void truncate_one_csum(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct btrfs_path *path, + struct btrfs_key *key, + u64 bytenr, u64 len) { struct extent_buffer *leaf; u16 csum_size = btrfs_super_csum_size(root->fs_info->super_copy); u64 csum_end; u64 end_byte = bytenr + len; u32 blocksize_bits = root->fs_info->sb->s_blocksize_bits; - int ret; leaf = path->nodes[0]; csum_end = btrfs_item_size_nr(leaf, path->slots[0]) / csum_size; @@ -510,7 +522,7 @@ static noinline int truncate_one_csum(struct btrfs_trans_handle *trans, */ u32 new_size = (bytenr - key->offset) >> blocksize_bits; new_size *= csum_size; - ret = btrfs_truncate_item(trans, root, path, new_size, 1); + btrfs_truncate_item(trans, root, path, new_size, 1); } else if (key->offset >= bytenr && csum_end > end_byte && end_byte > key->offset) { /* @@ -522,15 +534,13 @@ static noinline int truncate_one_csum(struct btrfs_trans_handle *trans, u32 new_size = (csum_end - end_byte) >> blocksize_bits; new_size *= csum_size; - ret = btrfs_truncate_item(trans, root, path, new_size, 0); + btrfs_truncate_item(trans, root, path, new_size, 0); key->offset = end_byte; - ret = btrfs_set_item_key_safe(trans, root, path, key); - BUG_ON(ret); + btrfs_set_item_key_safe(trans, root, path, key); } else { BUG(); } - return 0; } /* @@ -635,13 +645,14 @@ int btrfs_del_csums(struct btrfs_trans_handle *trans, * item changed size or key */ ret = btrfs_split_item(trans, root, path, &key, offset); - BUG_ON(ret && ret != -EAGAIN); + if (ret && ret != -EAGAIN) { + btrfs_abort_transaction(trans, root, ret); + goto out; + } key.offset = end_byte - 1; } else { - ret = truncate_one_csum(trans, root, path, - &key, bytenr, len); - BUG_ON(ret); + truncate_one_csum(trans, root, path, &key, bytenr, len); if (key.offset < bytenr) break; } @@ -772,7 +783,7 @@ again: if (diff != csum_size) goto insert; - ret = btrfs_extend_item(trans, root, path, diff); + btrfs_extend_item(trans, root, path, diff); goto csum; } diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index 859ba2d..d83260d 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -452,7 +452,7 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, split = alloc_extent_map(); if (!split2) split2 = alloc_extent_map(); - BUG_ON(!split || !split2); + BUG_ON(!split || !split2); /* -ENOMEM */ write_lock(&em_tree->lock); em = lookup_extent_mapping(em_tree, start, len); @@ -494,7 +494,7 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, split->flags = flags; split->compress_type = em->compress_type; ret = add_extent_mapping(em_tree, split); - BUG_ON(ret); + BUG_ON(ret); /* Logic error */ free_extent_map(split); split = split2; split2 = NULL; @@ -520,7 +520,7 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, } ret = add_extent_mapping(em_tree, split); - BUG_ON(ret); + BUG_ON(ret); /* Logic error */ free_extent_map(split); split = NULL; } @@ -679,7 +679,7 @@ next_slot: root->root_key.objectid, new_key.objectid, start - extent_offset, 0); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ *hint_byte = disk_bytenr; } key.offset = start; @@ -754,7 +754,7 @@ next_slot: root->root_key.objectid, key.objectid, key.offset - extent_offset, 0); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ inode_sub_bytes(inode, extent_end - key.offset); *hint_byte = disk_bytenr; @@ -770,7 +770,10 @@ next_slot: ret = btrfs_del_items(trans, root, path, del_slot, del_nr); - BUG_ON(ret); + if (ret) { + btrfs_abort_transaction(trans, root, ret); + goto out; + } del_nr = 0; del_slot = 0; @@ -782,11 +785,13 @@ next_slot: BUG_ON(1); } - if (del_nr > 0) { + if (!ret && del_nr > 0) { ret = btrfs_del_items(trans, root, path, del_slot, del_nr); - BUG_ON(ret); + if (ret) + btrfs_abort_transaction(trans, root, ret); } +out: btrfs_free_path(path); return ret; } @@ -944,7 +949,10 @@ again: btrfs_release_path(path); goto again; } - BUG_ON(ret < 0); + if (ret < 0) { + btrfs_abort_transaction(trans, root, ret); + goto out; + } leaf = path->nodes[0]; fi = btrfs_item_ptr(leaf, path->slots[0] - 1, @@ -963,7 +971,7 @@ again: ret = btrfs_inc_extent_ref(trans, root, bytenr, num_bytes, 0, root->root_key.objectid, ino, orig_offset, 0); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ if (split == start) { key.offset = start; @@ -990,7 +998,7 @@ again: ret = btrfs_free_extent(trans, root, bytenr, num_bytes, 0, root->root_key.objectid, ino, orig_offset, 0); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ } other_start = 0; other_end = start; @@ -1007,7 +1015,7 @@ again: ret = btrfs_free_extent(trans, root, bytenr, num_bytes, 0, root->root_key.objectid, ino, orig_offset, 0); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ } if (del_nr == 0) { fi = btrfs_item_ptr(leaf, path->slots[0], @@ -1025,7 +1033,10 @@ again: btrfs_mark_buffer_dirty(leaf); ret = btrfs_del_items(trans, root, path, del_slot, del_nr); - BUG_ON(ret); + if (ret < 0) { + btrfs_abort_transaction(trans, root, ret); + goto out; + } } out: btrfs_free_path(path); @@ -1105,8 +1116,7 @@ again: if (start_pos < inode->i_size) { struct btrfs_ordered_extent *ordered; lock_extent_bits(&BTRFS_I(inode)->io_tree, - start_pos, last_pos - 1, 0, &cached_state, - GFP_NOFS); + start_pos, last_pos - 1, 0, &cached_state); ordered = btrfs_lookup_first_ordered_extent(inode, last_pos - 1); if (ordered && @@ -1605,6 +1615,14 @@ static long btrfs_fallocate(struct file *file, int mode, return -EOPNOTSUPP; /* + * Make sure we have enough space before we do the + * allocation. + */ + ret = btrfs_check_data_free_space(inode, len); + if (ret) + return ret; + + /* * wait for ordered IO before we have any locks. We'll loop again * below with the locks held. */ @@ -1630,7 +1648,7 @@ static long btrfs_fallocate(struct file *file, int mode, * transaction */ lock_extent_bits(&BTRFS_I(inode)->io_tree, alloc_start, - locked_end, 0, &cached_state, GFP_NOFS); + locked_end, 0, &cached_state); ordered = btrfs_lookup_first_ordered_extent(inode, alloc_end - 1); if (ordered && @@ -1659,7 +1677,13 @@ static long btrfs_fallocate(struct file *file, int mode, em = btrfs_get_extent(inode, NULL, 0, cur_offset, alloc_end - cur_offset, 0); - BUG_ON(IS_ERR_OR_NULL(em)); + if (IS_ERR_OR_NULL(em)) { + if (!em) + ret = -ENOMEM; + else + ret = PTR_ERR(em); + break; + } last_byte = min(extent_map_end(em), alloc_end); actual_end = min_t(u64, extent_map_end(em), offset + len); last_byte = (last_byte + mask) & ~mask; @@ -1667,27 +1691,12 @@ static long btrfs_fallocate(struct file *file, int mode, if (em->block_start == EXTENT_MAP_HOLE || (cur_offset >= inode->i_size && !test_bit(EXTENT_FLAG_PREALLOC, &em->flags))) { - - /* - * Make sure we have enough space before we do the - * allocation. - */ - ret = btrfs_check_data_free_space(inode, last_byte - - cur_offset); - if (ret) { - free_extent_map(em); - break; - } - ret = btrfs_prealloc_file_range(inode, mode, cur_offset, last_byte - cur_offset, 1 << inode->i_blkbits, offset + len, &alloc_hint); - /* Let go of our reservation. */ - btrfs_free_reserved_data_space(inode, last_byte - - cur_offset); if (ret < 0) { free_extent_map(em); break; @@ -1715,6 +1724,8 @@ static long btrfs_fallocate(struct file *file, int mode, &cached_state, GFP_NOFS); out: mutex_unlock(&inode->i_mutex); + /* Let go of our reservation. */ + btrfs_free_reserved_data_space(inode, len); return ret; } @@ -1742,7 +1753,7 @@ static int find_desired_extent(struct inode *inode, loff_t *offset, int origin) return -ENXIO; lock_extent_bits(&BTRFS_I(inode)->io_tree, lockstart, lockend, 0, - &cached_state, GFP_NOFS); + &cached_state); /* * Delalloc is such a pain. If we have a hole and we have pending @@ -1761,7 +1772,7 @@ static int find_desired_extent(struct inode *inode, loff_t *offset, int origin) start - root->sectorsize, root->sectorsize, 0); if (IS_ERR(em)) { - ret = -ENXIO; + ret = PTR_ERR(em); goto out; } last_end = em->start + em->len; @@ -1773,7 +1784,7 @@ static int find_desired_extent(struct inode *inode, loff_t *offset, int origin) while (1) { em = btrfs_get_extent_fiemap(inode, NULL, 0, start, len, 0); if (IS_ERR(em)) { - ret = -ENXIO; + ret = PTR_ERR(em); break; } diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c index c2f2059..e88330d3 100644 --- a/fs/btrfs/free-space-cache.c +++ b/fs/btrfs/free-space-cache.c @@ -230,11 +230,13 @@ int btrfs_truncate_free_space_cache(struct btrfs_root *root, if (ret) { trans->block_rsv = rsv; - WARN_ON(1); + btrfs_abort_transaction(trans, root, ret); return ret; } ret = btrfs_update_inode(trans, root, inode); + if (ret) + btrfs_abort_transaction(trans, root, ret); trans->block_rsv = rsv; return ret; @@ -777,6 +779,7 @@ int load_free_space_cache(struct btrfs_fs_info *fs_info, spin_lock(&block_group->lock); if (block_group->disk_cache_state != BTRFS_DC_WRITTEN) { spin_unlock(&block_group->lock); + btrfs_free_path(path); goto out; } spin_unlock(&block_group->lock); @@ -868,7 +871,7 @@ int __btrfs_write_out_cache(struct btrfs_root *root, struct inode *inode, io_ctl_prepare_pages(&io_ctl, inode, 0); lock_extent_bits(&BTRFS_I(inode)->io_tree, 0, i_size_read(inode) - 1, - 0, &cached_state, GFP_NOFS); + 0, &cached_state); node = rb_first(&ctl->free_space_offset); if (!node && cluster) { @@ -1067,7 +1070,7 @@ int btrfs_write_out_cache(struct btrfs_root *root, spin_unlock(&block_group->lock); ret = 0; #ifdef DEBUG - printk(KERN_ERR "btrfs: failed to write free space cace " + printk(KERN_ERR "btrfs: failed to write free space cache " "for block group %llu\n", block_group->key.objectid); #endif } @@ -1947,14 +1950,14 @@ again: */ ret = btrfs_add_free_space(block_group, old_start, offset - old_start); - WARN_ON(ret); + WARN_ON(ret); /* -ENOMEM */ goto out; } ret = remove_from_bitmap(ctl, info, &offset, &bytes); if (ret == -EAGAIN) goto again; - BUG_ON(ret); + BUG_ON(ret); /* logic error */ out_lock: spin_unlock(&ctl->tree_lock); out: @@ -2345,7 +2348,7 @@ again: rb_erase(&entry->offset_index, &ctl->free_space_offset); ret = tree_insert_offset(&cluster->root, entry->offset, &entry->offset_index, 1); - BUG_ON(ret); + BUG_ON(ret); /* -EEXIST; Logic error */ trace_btrfs_setup_cluster(block_group, cluster, total_found * block_group->sectorsize, 1); @@ -2438,7 +2441,7 @@ setup_cluster_no_bitmap(struct btrfs_block_group_cache *block_group, ret = tree_insert_offset(&cluster->root, entry->offset, &entry->offset_index, 0); total_size += entry->bytes; - BUG_ON(ret); + BUG_ON(ret); /* -EEXIST; Logic error */ } while (node && entry != last); cluster->max_size = max_extent; @@ -2829,6 +2832,7 @@ u64 btrfs_find_ino_for_alloc(struct btrfs_root *fs_root) int ret; ret = search_bitmap(ctl, entry, &offset, &count); + /* Logic error; Should be empty if it can't find anything */ BUG_ON(ret); ino = offset; diff --git a/fs/btrfs/inode-item.c b/fs/btrfs/inode-item.c index baa74f3..a13cf1a 100644 --- a/fs/btrfs/inode-item.c +++ b/fs/btrfs/inode-item.c @@ -19,6 +19,7 @@ #include "ctree.h" #include "disk-io.h" #include "transaction.h" +#include "print-tree.h" static int find_name_in_backref(struct btrfs_path *path, const char *name, int name_len, struct btrfs_inode_ref **ref_ret) @@ -128,13 +129,14 @@ int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, item_start = btrfs_item_ptr_offset(leaf, path->slots[0]); memmove_extent_buffer(leaf, ptr, ptr + sub_item_len, item_size - (ptr + sub_item_len - item_start)); - ret = btrfs_truncate_item(trans, root, path, + btrfs_truncate_item(trans, root, path, item_size - sub_item_len, 1); out: btrfs_free_path(path); return ret; } +/* Will return 0, -ENOMEM, -EMLINK, or -EEXIST or anything from the CoW path */ int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, const char *name, int name_len, @@ -165,7 +167,7 @@ int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, goto out; old_size = btrfs_item_size_nr(path->nodes[0], path->slots[0]); - ret = btrfs_extend_item(trans, root, path, ins_len); + btrfs_extend_item(trans, root, path, ins_len); ref = btrfs_item_ptr(path->nodes[0], path->slots[0], struct btrfs_inode_ref); ref = (struct btrfs_inode_ref *)((unsigned long)ref + old_size); diff --git a/fs/btrfs/inode-map.c b/fs/btrfs/inode-map.c index 213ffa8..b1a1c92 100644 --- a/fs/btrfs/inode-map.c +++ b/fs/btrfs/inode-map.c @@ -178,7 +178,7 @@ static void start_caching(struct btrfs_root *root) tsk = kthread_run(caching_kthread, root, "btrfs-ino-cache-%llu\n", root->root_key.objectid); - BUG_ON(IS_ERR(tsk)); + BUG_ON(IS_ERR(tsk)); /* -ENOMEM */ } int btrfs_find_free_ino(struct btrfs_root *root, u64 *objectid) @@ -271,7 +271,7 @@ void btrfs_unpin_free_ino(struct btrfs_root *root) break; info = rb_entry(n, struct btrfs_free_space, offset_index); - BUG_ON(info->bitmap); + BUG_ON(info->bitmap); /* Logic error */ if (info->offset > root->cache_progress) goto free; @@ -438,17 +438,17 @@ int btrfs_save_ino_cache(struct btrfs_root *root, trans->bytes_reserved); if (ret) goto out; - trace_btrfs_space_reservation(root->fs_info, "ino_cache", (u64)trans, - trans->bytes_reserved, 1); + trace_btrfs_space_reservation(root->fs_info, "ino_cache", + trans->transid, trans->bytes_reserved, 1); again: inode = lookup_free_ino_inode(root, path); - if (IS_ERR(inode) && PTR_ERR(inode) != -ENOENT) { + if (IS_ERR(inode) && (PTR_ERR(inode) != -ENOENT || retry)) { ret = PTR_ERR(inode); goto out_release; } if (IS_ERR(inode)) { - BUG_ON(retry); + BUG_ON(retry); /* Logic error */ retry = true; ret = create_free_ino_inode(root, trans, path); @@ -459,12 +459,17 @@ again: BTRFS_I(inode)->generation = 0; ret = btrfs_update_inode(trans, root, inode); - WARN_ON(ret); + if (ret) { + btrfs_abort_transaction(trans, root, ret); + goto out_put; + } if (i_size_read(inode) > 0) { ret = btrfs_truncate_free_space_cache(root, trans, path, inode); - if (ret) + if (ret) { + btrfs_abort_transaction(trans, root, ret); goto out_put; + } } spin_lock(&root->cache_lock); @@ -500,8 +505,8 @@ again: out_put: iput(inode); out_release: - trace_btrfs_space_reservation(root->fs_info, "ino_cache", (u64)trans, - trans->bytes_reserved, 0); + trace_btrfs_space_reservation(root->fs_info, "ino_cache", + trans->transid, trans->bytes_reserved, 0); btrfs_block_rsv_release(root, trans->block_rsv, trans->bytes_reserved); out: trans->block_rsv = rsv; @@ -530,7 +535,7 @@ static int btrfs_find_highest_objectid(struct btrfs_root *root, u64 *objectid) ret = btrfs_search_slot(NULL, root, &search_key, path, 0, 0); if (ret < 0) goto error; - BUG_ON(ret == 0); + BUG_ON(ret == 0); /* Corruption */ if (path->slots[0] > 0) { slot = path->slots[0] - 1; l = path->nodes[0]; diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 32214fe..115bc05 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -150,7 +150,6 @@ static noinline int insert_inline_extent(struct btrfs_trans_handle *trans, inode_add_bytes(inode, size); ret = btrfs_insert_empty_item(trans, root, path, &key, datasize); - BUG_ON(ret); if (ret) { err = ret; goto fail; @@ -173,9 +172,9 @@ static noinline int insert_inline_extent(struct btrfs_trans_handle *trans, cur_size = min_t(unsigned long, compressed_size, PAGE_CACHE_SIZE); - kaddr = kmap_atomic(cpage, KM_USER0); + kaddr = kmap_atomic(cpage); write_extent_buffer(leaf, kaddr, ptr, cur_size); - kunmap_atomic(kaddr, KM_USER0); + kunmap_atomic(kaddr); i++; ptr += cur_size; @@ -187,10 +186,10 @@ static noinline int insert_inline_extent(struct btrfs_trans_handle *trans, page = find_get_page(inode->i_mapping, start >> PAGE_CACHE_SHIFT); btrfs_set_file_extent_compression(leaf, ei, 0); - kaddr = kmap_atomic(page, KM_USER0); + kaddr = kmap_atomic(page); offset = start & (PAGE_CACHE_SIZE - 1); write_extent_buffer(leaf, kaddr + offset, ptr, size); - kunmap_atomic(kaddr, KM_USER0); + kunmap_atomic(kaddr); page_cache_release(page); } btrfs_mark_buffer_dirty(leaf); @@ -206,9 +205,9 @@ static noinline int insert_inline_extent(struct btrfs_trans_handle *trans, * could end up racing with unlink. */ BTRFS_I(inode)->disk_i_size = inode->i_size; - btrfs_update_inode(trans, root, inode); + ret = btrfs_update_inode(trans, root, inode); - return 0; + return ret; fail: btrfs_free_path(path); return err; @@ -250,14 +249,18 @@ static noinline int cow_file_range_inline(struct btrfs_trans_handle *trans, ret = btrfs_drop_extents(trans, inode, start, aligned_end, &hint_byte, 1); - BUG_ON(ret); + if (ret) + return ret; if (isize > actual_end) inline_len = min_t(u64, isize, actual_end); ret = insert_inline_extent(trans, root, inode, start, inline_len, compressed_size, compress_type, compressed_pages); - BUG_ON(ret); + if (ret) { + btrfs_abort_transaction(trans, root, ret); + return ret; + } btrfs_delalloc_release_metadata(inode, end + 1 - start); btrfs_drop_extent_cache(inode, start, aligned_end - 1, 0); return 0; @@ -293,7 +296,7 @@ static noinline int add_async_extent(struct async_cow *cow, struct async_extent *async_extent; async_extent = kmalloc(sizeof(*async_extent), GFP_NOFS); - BUG_ON(!async_extent); + BUG_ON(!async_extent); /* -ENOMEM */ async_extent->start = start; async_extent->ram_size = ram_size; async_extent->compressed_size = compressed_size; @@ -344,8 +347,9 @@ static noinline int compress_file_range(struct inode *inode, int will_compress; int compress_type = root->fs_info->compress_type; - /* if this is a small write inside eof, kick off a defragbot */ - if (end <= BTRFS_I(inode)->disk_i_size && (end - start + 1) < 16 * 1024) + /* if this is a small write inside eof, kick off a defrag */ + if ((end - start + 1) < 16 * 1024 && + (start > 0 || end + 1 < BTRFS_I(inode)->disk_i_size)) btrfs_add_inode_defrag(NULL, inode); actual_end = min_t(u64, isize, end + 1); @@ -422,10 +426,10 @@ again: * sending it down to disk */ if (offset) { - kaddr = kmap_atomic(page, KM_USER0); + kaddr = kmap_atomic(page); memset(kaddr + offset, 0, PAGE_CACHE_SIZE - offset); - kunmap_atomic(kaddr, KM_USER0); + kunmap_atomic(kaddr); } will_compress = 1; } @@ -433,7 +437,11 @@ again: cont: if (start == 0) { trans = btrfs_join_transaction(root); - BUG_ON(IS_ERR(trans)); + if (IS_ERR(trans)) { + ret = PTR_ERR(trans); + trans = NULL; + goto cleanup_and_out; + } trans->block_rsv = &root->fs_info->delalloc_block_rsv; /* lets try to make an inline extent */ @@ -450,11 +458,11 @@ cont: total_compressed, compress_type, pages); } - if (ret == 0) { + if (ret <= 0) { /* - * inline extent creation worked, we don't need - * to create any more async work items. Unlock - * and free up our temp pages. + * inline extent creation worked or returned error, + * we don't need to create any more async work items. + * Unlock and free up our temp pages. */ extent_clear_unlock_delalloc(inode, &BTRFS_I(inode)->io_tree, @@ -547,7 +555,7 @@ cleanup_and_bail_uncompressed: } out: - return 0; + return ret; free_pages_out: for (i = 0; i < nr_pages_ret; i++) { @@ -557,6 +565,20 @@ free_pages_out: kfree(pages); goto out; + +cleanup_and_out: + extent_clear_unlock_delalloc(inode, &BTRFS_I(inode)->io_tree, + start, end, NULL, + EXTENT_CLEAR_UNLOCK_PAGE | + EXTENT_CLEAR_DIRTY | + EXTENT_CLEAR_DELALLOC | + EXTENT_SET_WRITEBACK | + EXTENT_END_WRITEBACK); + if (!trans || IS_ERR(trans)) + btrfs_error(root->fs_info, ret, "Failed to join transaction"); + else + btrfs_abort_transaction(trans, root, ret); + goto free_pages_out; } /* @@ -597,7 +619,7 @@ retry: lock_extent(io_tree, async_extent->start, async_extent->start + - async_extent->ram_size - 1, GFP_NOFS); + async_extent->ram_size - 1); /* allocate blocks */ ret = cow_file_range(inode, async_cow->locked_page, @@ -606,6 +628,8 @@ retry: async_extent->ram_size - 1, &page_started, &nr_written, 0); + /* JDM XXX */ + /* * if page_started, cow_file_range inserted an * inline extent and took care of all the unlocking @@ -625,18 +649,21 @@ retry: } lock_extent(io_tree, async_extent->start, - async_extent->start + async_extent->ram_size - 1, - GFP_NOFS); + async_extent->start + async_extent->ram_size - 1); trans = btrfs_join_transaction(root); - BUG_ON(IS_ERR(trans)); - trans->block_rsv = &root->fs_info->delalloc_block_rsv; - ret = btrfs_reserve_extent(trans, root, + if (IS_ERR(trans)) { + ret = PTR_ERR(trans); + } else { + trans->block_rsv = &root->fs_info->delalloc_block_rsv; + ret = btrfs_reserve_extent(trans, root, async_extent->compressed_size, async_extent->compressed_size, - 0, alloc_hint, - (u64)-1, &ins, 1); - btrfs_end_transaction(trans, root); + 0, alloc_hint, &ins, 1); + if (ret) + btrfs_abort_transaction(trans, root, ret); + btrfs_end_transaction(trans, root); + } if (ret) { int i; @@ -649,8 +676,10 @@ retry: async_extent->pages = NULL; unlock_extent(io_tree, async_extent->start, async_extent->start + - async_extent->ram_size - 1, GFP_NOFS); - goto retry; + async_extent->ram_size - 1); + if (ret == -ENOSPC) + goto retry; + goto out_free; /* JDM: Requeue? */ } /* @@ -662,7 +691,7 @@ retry: async_extent->ram_size - 1, 0); em = alloc_extent_map(); - BUG_ON(!em); + BUG_ON(!em); /* -ENOMEM */ em->start = async_extent->start; em->len = async_extent->ram_size; em->orig_start = em->start; @@ -694,7 +723,7 @@ retry: ins.offset, BTRFS_ORDERED_COMPRESSED, async_extent->compress_type); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ /* * clear dirty, set writeback and unlock the pages. @@ -716,13 +745,17 @@ retry: ins.offset, async_extent->pages, async_extent->nr_pages); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ alloc_hint = ins.objectid + ins.offset; kfree(async_extent); cond_resched(); } - - return 0; + ret = 0; +out: + return ret; +out_free: + kfree(async_extent); + goto out; } static u64 get_extent_allocation_hint(struct inode *inode, u64 start, @@ -791,7 +824,18 @@ static noinline int cow_file_range(struct inode *inode, BUG_ON(btrfs_is_free_space_inode(root, inode)); trans = btrfs_join_transaction(root); - BUG_ON(IS_ERR(trans)); + if (IS_ERR(trans)) { + extent_clear_unlock_delalloc(inode, + &BTRFS_I(inode)->io_tree, + start, end, NULL, + EXTENT_CLEAR_UNLOCK_PAGE | + EXTENT_CLEAR_UNLOCK | + EXTENT_CLEAR_DELALLOC | + EXTENT_CLEAR_DIRTY | + EXTENT_SET_WRITEBACK | + EXTENT_END_WRITEBACK); + return PTR_ERR(trans); + } trans->block_rsv = &root->fs_info->delalloc_block_rsv; num_bytes = (end - start + blocksize) & ~(blocksize - 1); @@ -800,7 +844,8 @@ static noinline int cow_file_range(struct inode *inode, ret = 0; /* if this is a small write inside eof, kick off defrag */ - if (end <= BTRFS_I(inode)->disk_i_size && num_bytes < 64 * 1024) + if (num_bytes < 64 * 1024 && + (start > 0 || end + 1 < BTRFS_I(inode)->disk_i_size)) btrfs_add_inode_defrag(trans, inode); if (start == 0) { @@ -821,8 +866,10 @@ static noinline int cow_file_range(struct inode *inode, *nr_written = *nr_written + (end - start + PAGE_CACHE_SIZE) / PAGE_CACHE_SIZE; *page_started = 1; - ret = 0; goto out; + } else if (ret < 0) { + btrfs_abort_transaction(trans, root, ret); + goto out_unlock; } } @@ -838,11 +885,14 @@ static noinline int cow_file_range(struct inode *inode, cur_alloc_size = disk_num_bytes; ret = btrfs_reserve_extent(trans, root, cur_alloc_size, root->sectorsize, 0, alloc_hint, - (u64)-1, &ins, 1); - BUG_ON(ret); + &ins, 1); + if (ret < 0) { + btrfs_abort_transaction(trans, root, ret); + goto out_unlock; + } em = alloc_extent_map(); - BUG_ON(!em); + BUG_ON(!em); /* -ENOMEM */ em->start = start; em->orig_start = em->start; ram_size = ins.offset; @@ -868,13 +918,16 @@ static noinline int cow_file_range(struct inode *inode, cur_alloc_size = ins.offset; ret = btrfs_add_ordered_extent(inode, start, ins.objectid, ram_size, cur_alloc_size, 0); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ if (root->root_key.objectid == BTRFS_DATA_RELOC_TREE_OBJECTID) { ret = btrfs_reloc_clone_csums(inode, start, cur_alloc_size); - BUG_ON(ret); + if (ret) { + btrfs_abort_transaction(trans, root, ret); + goto out_unlock; + } } if (disk_num_bytes < cur_alloc_size) @@ -899,11 +952,23 @@ static noinline int cow_file_range(struct inode *inode, alloc_hint = ins.objectid + ins.offset; start += cur_alloc_size; } -out: ret = 0; +out: btrfs_end_transaction(trans, root); return ret; +out_unlock: + extent_clear_unlock_delalloc(inode, + &BTRFS_I(inode)->io_tree, + start, end, NULL, + EXTENT_CLEAR_UNLOCK_PAGE | + EXTENT_CLEAR_UNLOCK | + EXTENT_CLEAR_DELALLOC | + EXTENT_CLEAR_DIRTY | + EXTENT_SET_WRITEBACK | + EXTENT_END_WRITEBACK); + + goto out; } /* @@ -969,7 +1034,7 @@ static int cow_file_range_async(struct inode *inode, struct page *locked_page, 1, 0, NULL, GFP_NOFS); while (start < end) { async_cow = kmalloc(sizeof(*async_cow), GFP_NOFS); - BUG_ON(!async_cow); + BUG_ON(!async_cow); /* -ENOMEM */ async_cow->inode = inode; async_cow->root = root; async_cow->locked_page = locked_page; @@ -1060,7 +1125,7 @@ static noinline int run_delalloc_nocow(struct inode *inode, u64 disk_bytenr; u64 num_bytes; int extent_type; - int ret; + int ret, err; int type; int nocow; int check_prev = 1; @@ -1078,7 +1143,11 @@ static noinline int run_delalloc_nocow(struct inode *inode, else trans = btrfs_join_transaction(root); - BUG_ON(IS_ERR(trans)); + if (IS_ERR(trans)) { + btrfs_free_path(path); + return PTR_ERR(trans); + } + trans->block_rsv = &root->fs_info->delalloc_block_rsv; cow_start = (u64)-1; @@ -1086,7 +1155,10 @@ static noinline int run_delalloc_nocow(struct inode *inode, while (1) { ret = btrfs_lookup_file_extent(trans, root, path, ino, cur_offset, 0); - BUG_ON(ret < 0); + if (ret < 0) { + btrfs_abort_transaction(trans, root, ret); + goto error; + } if (ret > 0 && path->slots[0] > 0 && check_prev) { leaf = path->nodes[0]; btrfs_item_key_to_cpu(leaf, &found_key, @@ -1100,8 +1172,10 @@ next_slot: leaf = path->nodes[0]; if (path->slots[0] >= btrfs_header_nritems(leaf)) { ret = btrfs_next_leaf(root, path); - if (ret < 0) - BUG_ON(1); + if (ret < 0) { + btrfs_abort_transaction(trans, root, ret); + goto error; + } if (ret > 0) break; leaf = path->nodes[0]; @@ -1189,7 +1263,10 @@ out_check: ret = cow_file_range(inode, locked_page, cow_start, found_key.offset - 1, page_started, nr_written, 1); - BUG_ON(ret); + if (ret) { + btrfs_abort_transaction(trans, root, ret); + goto error; + } cow_start = (u64)-1; } @@ -1198,7 +1275,7 @@ out_check: struct extent_map_tree *em_tree; em_tree = &BTRFS_I(inode)->extent_tree; em = alloc_extent_map(); - BUG_ON(!em); + BUG_ON(!em); /* -ENOMEM */ em->start = cur_offset; em->orig_start = em->start; em->len = num_bytes; @@ -1224,13 +1301,16 @@ out_check: ret = btrfs_add_ordered_extent(inode, cur_offset, disk_bytenr, num_bytes, num_bytes, type); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ if (root->root_key.objectid == BTRFS_DATA_RELOC_TREE_OBJECTID) { ret = btrfs_reloc_clone_csums(inode, cur_offset, num_bytes); - BUG_ON(ret); + if (ret) { + btrfs_abort_transaction(trans, root, ret); + goto error; + } } extent_clear_unlock_delalloc(inode, &BTRFS_I(inode)->io_tree, @@ -1249,18 +1329,23 @@ out_check: if (cow_start != (u64)-1) { ret = cow_file_range(inode, locked_page, cow_start, end, page_started, nr_written, 1); - BUG_ON(ret); + if (ret) { + btrfs_abort_transaction(trans, root, ret); + goto error; + } } +error: if (nolock) { - ret = btrfs_end_transaction_nolock(trans, root); - BUG_ON(ret); + err = btrfs_end_transaction_nolock(trans, root); } else { - ret = btrfs_end_transaction(trans, root); - BUG_ON(ret); + err = btrfs_end_transaction(trans, root); } + if (!ret) + ret = err; + btrfs_free_path(path); - return 0; + return ret; } /* @@ -1425,10 +1510,11 @@ int btrfs_merge_bio_hook(struct page *page, unsigned long offset, map_length = length; ret = btrfs_map_block(map_tree, READ, logical, &map_length, NULL, 0); - + /* Will always return 0 or 1 with map_multi == NULL */ + BUG_ON(ret < 0); if (map_length < length + size) return 1; - return ret; + return 0; } /* @@ -1448,7 +1534,7 @@ static int __btrfs_submit_bio_start(struct inode *inode, int rw, int ret = 0; ret = btrfs_csum_one_bio(root, inode, bio, 0, 0); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ return 0; } @@ -1479,14 +1565,16 @@ static int btrfs_submit_bio_hook(struct inode *inode, int rw, struct bio *bio, struct btrfs_root *root = BTRFS_I(inode)->root; int ret = 0; int skip_sum; + int metadata = 0; skip_sum = BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM; if (btrfs_is_free_space_inode(root, inode)) - ret = btrfs_bio_wq_end_io(root->fs_info, bio, 2); - else - ret = btrfs_bio_wq_end_io(root->fs_info, bio, 0); - BUG_ON(ret); + metadata = 2; + + ret = btrfs_bio_wq_end_io(root->fs_info, bio, metadata); + if (ret) + return ret; if (!(rw & REQ_WRITE)) { if (bio_flags & EXTENT_BIO_COMPRESSED) { @@ -1555,6 +1643,7 @@ static void btrfs_writepage_fixup_worker(struct btrfs_work *work) struct inode *inode; u64 page_start; u64 page_end; + int ret; fixup = container_of(work, struct btrfs_writepage_fixup, work); page = fixup->page; @@ -1570,7 +1659,7 @@ again: page_end = page_offset(page) + PAGE_CACHE_SIZE - 1; lock_extent_bits(&BTRFS_I(inode)->io_tree, page_start, page_end, 0, - &cached_state, GFP_NOFS); + &cached_state); /* already ordered? We're done */ if (PagePrivate2(page)) @@ -1582,12 +1671,21 @@ again: page_end, &cached_state, GFP_NOFS); unlock_page(page); btrfs_start_ordered_extent(inode, ordered, 1); + btrfs_put_ordered_extent(ordered); goto again; } - BUG(); + ret = btrfs_delalloc_reserve_space(inode, PAGE_CACHE_SIZE); + if (ret) { + mapping_set_error(page->mapping, ret); + end_extent_writepage(page, ret, page_start, page_end); + ClearPageChecked(page); + goto out; + } + btrfs_set_extent_delalloc(inode, page_start, page_end, &cached_state); ClearPageChecked(page); + set_page_dirty(page); out: unlock_extent_cached(&BTRFS_I(inode)->io_tree, page_start, page_end, &cached_state, GFP_NOFS); @@ -1630,7 +1728,7 @@ static int btrfs_writepage_start_hook(struct page *page, u64 start, u64 end) fixup->work.func = btrfs_writepage_fixup_worker; fixup->page = page; btrfs_queue_worker(&root->fs_info->fixup_workers, &fixup->work); - return -EAGAIN; + return -EBUSY; } static int insert_reserved_file_extent(struct btrfs_trans_handle *trans, @@ -1665,13 +1763,15 @@ static int insert_reserved_file_extent(struct btrfs_trans_handle *trans, */ ret = btrfs_drop_extents(trans, inode, file_pos, file_pos + num_bytes, &hint, 0); - BUG_ON(ret); + if (ret) + goto out; ins.objectid = btrfs_ino(inode); ins.offset = file_pos; ins.type = BTRFS_EXTENT_DATA_KEY; ret = btrfs_insert_empty_item(trans, root, path, &ins, sizeof(*fi)); - BUG_ON(ret); + if (ret) + goto out; leaf = path->nodes[0]; fi = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_file_extent_item); @@ -1699,10 +1799,10 @@ static int insert_reserved_file_extent(struct btrfs_trans_handle *trans, ret = btrfs_alloc_reserved_file_extent(trans, root, root->root_key.objectid, btrfs_ino(inode), file_pos, &ins); - BUG_ON(ret); +out: btrfs_free_path(path); - return 0; + return ret; } /* @@ -1730,35 +1830,41 @@ static int btrfs_finish_ordered_io(struct inode *inode, u64 start, u64 end) end - start + 1); if (!ret) return 0; - BUG_ON(!ordered_extent); + BUG_ON(!ordered_extent); /* Logic error */ nolock = btrfs_is_free_space_inode(root, inode); if (test_bit(BTRFS_ORDERED_NOCOW, &ordered_extent->flags)) { - BUG_ON(!list_empty(&ordered_extent->list)); + BUG_ON(!list_empty(&ordered_extent->list)); /* Logic error */ ret = btrfs_ordered_update_i_size(inode, 0, ordered_extent); if (!ret) { if (nolock) trans = btrfs_join_transaction_nolock(root); else trans = btrfs_join_transaction(root); - BUG_ON(IS_ERR(trans)); + if (IS_ERR(trans)) + return PTR_ERR(trans); trans->block_rsv = &root->fs_info->delalloc_block_rsv; ret = btrfs_update_inode_fallback(trans, root, inode); - BUG_ON(ret); + if (ret) /* -ENOMEM or corruption */ + btrfs_abort_transaction(trans, root, ret); } goto out; } lock_extent_bits(io_tree, ordered_extent->file_offset, ordered_extent->file_offset + ordered_extent->len - 1, - 0, &cached_state, GFP_NOFS); + 0, &cached_state); if (nolock) trans = btrfs_join_transaction_nolock(root); else trans = btrfs_join_transaction(root); - BUG_ON(IS_ERR(trans)); + if (IS_ERR(trans)) { + ret = PTR_ERR(trans); + trans = NULL; + goto out_unlock; + } trans->block_rsv = &root->fs_info->delalloc_block_rsv; if (test_bit(BTRFS_ORDERED_COMPRESSED, &ordered_extent->flags)) @@ -1769,7 +1875,6 @@ static int btrfs_finish_ordered_io(struct inode *inode, u64 start, u64 end) ordered_extent->file_offset, ordered_extent->file_offset + ordered_extent->len); - BUG_ON(ret); } else { BUG_ON(root == root->fs_info->tree_root); ret = insert_reserved_file_extent(trans, inode, @@ -1783,11 +1888,14 @@ static int btrfs_finish_ordered_io(struct inode *inode, u64 start, u64 end) unpin_extent_cache(&BTRFS_I(inode)->extent_tree, ordered_extent->file_offset, ordered_extent->len); - BUG_ON(ret); } unlock_extent_cached(io_tree, ordered_extent->file_offset, ordered_extent->file_offset + ordered_extent->len - 1, &cached_state, GFP_NOFS); + if (ret < 0) { + btrfs_abort_transaction(trans, root, ret); + goto out; + } add_pending_csums(trans, inode, ordered_extent->file_offset, &ordered_extent->list); @@ -1795,7 +1903,10 @@ static int btrfs_finish_ordered_io(struct inode *inode, u64 start, u64 end) ret = btrfs_ordered_update_i_size(inode, 0, ordered_extent); if (!ret || !test_bit(BTRFS_ORDERED_PREALLOC, &ordered_extent->flags)) { ret = btrfs_update_inode_fallback(trans, root, inode); - BUG_ON(ret); + if (ret) { /* -ENOMEM or corruption */ + btrfs_abort_transaction(trans, root, ret); + goto out; + } } ret = 0; out: @@ -1814,6 +1925,11 @@ out: btrfs_put_ordered_extent(ordered_extent); return 0; +out_unlock: + unlock_extent_cached(io_tree, ordered_extent->file_offset, + ordered_extent->file_offset + + ordered_extent->len - 1, &cached_state, GFP_NOFS); + goto out; } static int btrfs_writepage_end_io_hook(struct page *page, u64 start, u64 end, @@ -1863,7 +1979,7 @@ static int btrfs_readpage_end_io_hook(struct page *page, u64 start, u64 end, } else { ret = get_state_private(io_tree, start, &private); } - kaddr = kmap_atomic(page, KM_USER0); + kaddr = kmap_atomic(page); if (ret) goto zeroit; @@ -1872,7 +1988,7 @@ static int btrfs_readpage_end_io_hook(struct page *page, u64 start, u64 end, if (csum != private) goto zeroit; - kunmap_atomic(kaddr, KM_USER0); + kunmap_atomic(kaddr); good: return 0; @@ -1884,7 +2000,7 @@ zeroit: (unsigned long long)private); memset(kaddr + offset, 1, end - start + 1); flush_dcache_page(page); - kunmap_atomic(kaddr, KM_USER0); + kunmap_atomic(kaddr); if (private == 0) return 0; return -EIO; @@ -1895,6 +2011,8 @@ struct delayed_iput { struct inode *inode; }; +/* JDM: If this is fs-wide, why can't we add a pointer to + * btrfs_inode instead and avoid the allocation? */ void btrfs_add_delayed_iput(struct inode *inode) { struct btrfs_fs_info *fs_info = BTRFS_I(inode)->root->fs_info; @@ -2041,20 +2159,27 @@ int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode) /* grab metadata reservation from transaction handle */ if (reserve) { ret = btrfs_orphan_reserve_metadata(trans, inode); - BUG_ON(ret); + BUG_ON(ret); /* -ENOSPC in reservation; Logic error? JDM */ } /* insert an orphan item to track this unlinked/truncated file */ if (insert >= 1) { ret = btrfs_insert_orphan_item(trans, root, btrfs_ino(inode)); - BUG_ON(ret && ret != -EEXIST); + if (ret && ret != -EEXIST) { + btrfs_abort_transaction(trans, root, ret); + return ret; + } + ret = 0; } /* insert an orphan item to track subvolume contains orphan files */ if (insert >= 2) { ret = btrfs_insert_orphan_item(trans, root->fs_info->tree_root, root->root_key.objectid); - BUG_ON(ret); + if (ret && ret != -EEXIST) { + btrfs_abort_transaction(trans, root, ret); + return ret; + } } return 0; } @@ -2084,7 +2209,7 @@ int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode) if (trans && delete_item) { ret = btrfs_del_orphan_item(trans, root, btrfs_ino(inode)); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM or corruption (JDM: Recheck) */ } if (release_rsv) @@ -2218,7 +2343,7 @@ int btrfs_orphan_cleanup(struct btrfs_root *root) } ret = btrfs_del_orphan_item(trans, root, found_key.objectid); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM or corruption (JDM: Recheck) */ btrfs_end_transaction(trans, root); continue; } @@ -2600,16 +2725,22 @@ static int __btrfs_unlink_inode(struct btrfs_trans_handle *trans, printk(KERN_INFO "btrfs failed to delete reference to %.*s, " "inode %llu parent %llu\n", name_len, name, (unsigned long long)ino, (unsigned long long)dir_ino); + btrfs_abort_transaction(trans, root, ret); goto err; } ret = btrfs_delete_delayed_dir_index(trans, root, dir, index); - if (ret) + if (ret) { + btrfs_abort_transaction(trans, root, ret); goto err; + } ret = btrfs_del_inode_ref_in_log(trans, root, name, name_len, inode, dir_ino); - BUG_ON(ret != 0 && ret != -ENOENT); + if (ret != 0 && ret != -ENOENT) { + btrfs_abort_transaction(trans, root, ret); + goto err; + } ret = btrfs_del_dir_entries_in_log(trans, root, name, name_len, dir, index); @@ -2767,7 +2898,7 @@ static struct btrfs_trans_handle *__unlink_start_trans(struct inode *dir, err = ret; goto out; } - BUG_ON(ret == 0); + BUG_ON(ret == 0); /* Corruption */ if (check_path_shared(root, path)) goto out; btrfs_release_path(path); @@ -2800,7 +2931,7 @@ static struct btrfs_trans_handle *__unlink_start_trans(struct inode *dir, err = PTR_ERR(ref); goto out; } - BUG_ON(!ref); + BUG_ON(!ref); /* Logic error */ if (check_path_shared(root, path)) goto out; index = btrfs_inode_ref_index(path->nodes[0], ref); @@ -2907,23 +3038,42 @@ int btrfs_unlink_subvol(struct btrfs_trans_handle *trans, di = btrfs_lookup_dir_item(trans, root, path, dir_ino, name, name_len, -1); - BUG_ON(IS_ERR_OR_NULL(di)); + if (IS_ERR_OR_NULL(di)) { + if (!di) + ret = -ENOENT; + else + ret = PTR_ERR(di); + goto out; + } leaf = path->nodes[0]; btrfs_dir_item_key_to_cpu(leaf, di, &key); WARN_ON(key.type != BTRFS_ROOT_ITEM_KEY || key.objectid != objectid); ret = btrfs_delete_one_dir_name(trans, root, path, di); - BUG_ON(ret); + if (ret) { + btrfs_abort_transaction(trans, root, ret); + goto out; + } btrfs_release_path(path); ret = btrfs_del_root_ref(trans, root->fs_info->tree_root, objectid, root->root_key.objectid, dir_ino, &index, name, name_len); if (ret < 0) { - BUG_ON(ret != -ENOENT); + if (ret != -ENOENT) { + btrfs_abort_transaction(trans, root, ret); + goto out; + } di = btrfs_search_dir_index_item(root, path, dir_ino, name, name_len); - BUG_ON(IS_ERR_OR_NULL(di)); + if (IS_ERR_OR_NULL(di)) { + if (!di) + ret = -ENOENT; + else + ret = PTR_ERR(di); + btrfs_abort_transaction(trans, root, ret); + goto out; + } leaf = path->nodes[0]; btrfs_item_key_to_cpu(leaf, &key, path->slots[0]); @@ -2933,15 +3083,19 @@ int btrfs_unlink_subvol(struct btrfs_trans_handle *trans, btrfs_release_path(path); ret = btrfs_delete_delayed_dir_index(trans, root, dir, index); - BUG_ON(ret); + if (ret) { + btrfs_abort_transaction(trans, root, ret); + goto out; + } btrfs_i_size_write(dir, dir->i_size - name_len * 2); dir->i_mtime = dir->i_ctime = CURRENT_TIME; ret = btrfs_update_inode(trans, root, dir); - BUG_ON(ret); - + if (ret) + btrfs_abort_transaction(trans, root, ret); +out: btrfs_free_path(path); - return 0; + return ret; } static int btrfs_rmdir(struct inode *dir, struct dentry *dentry) @@ -3151,8 +3305,8 @@ search_again: } size = btrfs_file_extent_calc_inline_size(size); - ret = btrfs_truncate_item(trans, root, path, - size, 1); + btrfs_truncate_item(trans, root, path, + size, 1); } else if (root->ref_cows) { inode_sub_bytes(inode, item_end + 1 - found_key.offset); @@ -3200,7 +3354,11 @@ delete: ret = btrfs_del_items(trans, root, path, pending_del_slot, pending_del_nr); - BUG_ON(ret); + if (ret) { + btrfs_abort_transaction(trans, + root, ret); + goto error; + } pending_del_nr = 0; } btrfs_release_path(path); @@ -3213,8 +3371,10 @@ out: if (pending_del_nr) { ret = btrfs_del_items(trans, root, path, pending_del_slot, pending_del_nr); - BUG_ON(ret); + if (ret) + btrfs_abort_transaction(trans, root, ret); } +error: btrfs_free_path(path); return err; } @@ -3272,8 +3432,7 @@ again: } wait_on_page_writeback(page); - lock_extent_bits(io_tree, page_start, page_end, 0, &cached_state, - GFP_NOFS); + lock_extent_bits(io_tree, page_start, page_end, 0, &cached_state); set_page_extent_mapped(page); ordered = btrfs_lookup_ordered_extent(inode, page_start); @@ -3349,7 +3508,7 @@ int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size) btrfs_wait_ordered_range(inode, hole_start, block_end - hole_start); lock_extent_bits(io_tree, hole_start, block_end - 1, 0, - &cached_state, GFP_NOFS); + &cached_state); ordered = btrfs_lookup_ordered_extent(inode, hole_start); if (!ordered) break; @@ -3362,7 +3521,10 @@ int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size) while (1) { em = btrfs_get_extent(inode, NULL, 0, cur_offset, block_end - cur_offset, 0); - BUG_ON(IS_ERR_OR_NULL(em)); + if (IS_ERR(em)) { + err = PTR_ERR(em); + break; + } last_byte = min(extent_map_end(em), block_end); last_byte = (last_byte + mask) & ~mask; if (!test_bit(EXTENT_FLAG_PREALLOC, &em->flags)) { @@ -3379,7 +3541,7 @@ int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size) cur_offset + hole_size, &hint_byte, 1); if (err) { - btrfs_update_inode(trans, root, inode); + btrfs_abort_transaction(trans, root, err); btrfs_end_transaction(trans, root); break; } @@ -3389,7 +3551,7 @@ int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size) 0, hole_size, 0, hole_size, 0, 0, 0); if (err) { - btrfs_update_inode(trans, root, inode); + btrfs_abort_transaction(trans, root, err); btrfs_end_transaction(trans, root); break; } @@ -3769,7 +3931,7 @@ static void inode_tree_del(struct inode *inode) } } -int btrfs_invalidate_inodes(struct btrfs_root *root) +void btrfs_invalidate_inodes(struct btrfs_root *root) { struct rb_node *node; struct rb_node *prev; @@ -3829,7 +3991,6 @@ again: node = rb_next(node); } spin_unlock(&root->inode_lock); - return 0; } static int btrfs_init_locked_inode(struct inode *inode, void *p) @@ -4571,16 +4732,42 @@ int btrfs_add_link(struct btrfs_trans_handle *trans, parent_ino, index); } - if (ret == 0) { - ret = btrfs_insert_dir_item(trans, root, name, name_len, - parent_inode, &key, - btrfs_inode_type(inode), index); - BUG_ON(ret); + /* Nothing to clean up yet */ + if (ret) + return ret; + + ret = btrfs_insert_dir_item(trans, root, name, name_len, + parent_inode, &key, + btrfs_inode_type(inode), index); + if (ret == -EEXIST) + goto fail_dir_item; + else if (ret) { + btrfs_abort_transaction(trans, root, ret); + return ret; + } + + btrfs_i_size_write(parent_inode, parent_inode->i_size + + name_len * 2); + parent_inode->i_mtime = parent_inode->i_ctime = CURRENT_TIME; + ret = btrfs_update_inode(trans, root, parent_inode); + if (ret) + btrfs_abort_transaction(trans, root, ret); + return ret; + +fail_dir_item: + if (unlikely(ino == BTRFS_FIRST_FREE_OBJECTID)) { + u64 local_index; + int err; + err = btrfs_del_root_ref(trans, root->fs_info->tree_root, + key.objectid, root->root_key.objectid, + parent_ino, &local_index, name, name_len); - btrfs_i_size_write(parent_inode, parent_inode->i_size + - name_len * 2); - parent_inode->i_mtime = parent_inode->i_ctime = CURRENT_TIME; - ret = btrfs_update_inode(trans, root, parent_inode); + } else if (add_backref) { + u64 local_index; + int err; + + err = btrfs_del_inode_ref(trans, root, name, name_len, + ino, parent_ino, &local_index); } return ret; } @@ -4778,7 +4965,8 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir, } else { struct dentry *parent = dentry->d_parent; err = btrfs_update_inode(trans, root, inode); - BUG_ON(err); + if (err) + goto fail; d_instantiate(dentry, inode); btrfs_log_new_name(trans, inode, NULL, parent); } @@ -4909,12 +5097,12 @@ static noinline int uncompress_inline(struct btrfs_path *path, ret = btrfs_decompress(compress_type, tmp, page, extent_offset, inline_size, max_size); if (ret) { - char *kaddr = kmap_atomic(page, KM_USER0); + char *kaddr = kmap_atomic(page); unsigned long copy_size = min_t(u64, PAGE_CACHE_SIZE - pg_offset, max_size - extent_offset); memset(kaddr + pg_offset, 0, copy_size); - kunmap_atomic(kaddr, KM_USER0); + kunmap_atomic(kaddr); } kfree(tmp); return 0; @@ -5109,7 +5297,7 @@ again: ret = uncompress_inline(path, inode, page, pg_offset, extent_offset, item); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ } else { map = kmap(page); read_extent_buffer(leaf, map + pg_offset, ptr, @@ -5224,6 +5412,7 @@ out: free_extent_map(em); return ERR_PTR(err); } + BUG_ON(!em); /* Error is always set */ return em; } @@ -5386,7 +5575,7 @@ static struct extent_map *btrfs_new_extent_direct(struct inode *inode, alloc_hint = get_extent_allocation_hint(inode, start, len); ret = btrfs_reserve_extent(trans, root, len, root->sectorsize, 0, - alloc_hint, (u64)-1, &ins, 1); + alloc_hint, &ins, 1); if (ret) { em = ERR_PTR(ret); goto out; @@ -5574,7 +5763,7 @@ static int btrfs_get_blocks_direct(struct inode *inode, sector_t iblock, free_extent_map(em); /* DIO will do one hole at a time, so just unlock a sector */ unlock_extent(&BTRFS_I(inode)->io_tree, start, - start + root->sectorsize - 1, GFP_NOFS); + start + root->sectorsize - 1); return 0; } @@ -5691,11 +5880,11 @@ static void btrfs_endio_direct_read(struct bio *bio, int err) unsigned long flags; local_irq_save(flags); - kaddr = kmap_atomic(page, KM_IRQ0); + kaddr = kmap_atomic(page); csum = btrfs_csum_data(root, kaddr + bvec->bv_offset, csum, bvec->bv_len); btrfs_csum_final(csum, (char *)&csum); - kunmap_atomic(kaddr, KM_IRQ0); + kunmap_atomic(kaddr); local_irq_restore(flags); flush_dcache_page(bvec->bv_page); @@ -5715,7 +5904,7 @@ static void btrfs_endio_direct_read(struct bio *bio, int err) } while (bvec <= bvec_end); unlock_extent(&BTRFS_I(inode)->io_tree, dip->logical_offset, - dip->logical_offset + dip->bytes - 1, GFP_NOFS); + dip->logical_offset + dip->bytes - 1); bio->bi_private = dip->private; kfree(dip->csums); @@ -5766,7 +5955,7 @@ again: lock_extent_bits(&BTRFS_I(inode)->io_tree, ordered->file_offset, ordered->file_offset + ordered->len - 1, 0, - &cached_state, GFP_NOFS); + &cached_state); if (test_bit(BTRFS_ORDERED_PREALLOC, &ordered->flags)) { ret = btrfs_mark_extent_written(trans, inode, @@ -5840,7 +6029,7 @@ static int __btrfs_submit_bio_start_direct_io(struct inode *inode, int rw, int ret; struct btrfs_root *root = BTRFS_I(inode)->root; ret = btrfs_csum_one_bio(root, inode, bio, offset, 1); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ return 0; } @@ -6181,7 +6370,7 @@ static ssize_t btrfs_direct_IO(int rw, struct kiocb *iocb, while (1) { lock_extent_bits(&BTRFS_I(inode)->io_tree, lockstart, lockend, - 0, &cached_state, GFP_NOFS); + 0, &cached_state); /* * We're concerned with the entire range that we're going to be * doing DIO to, so we need to make sure theres no ordered @@ -6205,7 +6394,7 @@ static ssize_t btrfs_direct_IO(int rw, struct kiocb *iocb, if (writing) { write_bits = EXTENT_DELALLOC | EXTENT_DO_ACCOUNTING; ret = set_extent_bit(&BTRFS_I(inode)->io_tree, lockstart, lockend, - EXTENT_DELALLOC, 0, NULL, &cached_state, + EXTENT_DELALLOC, NULL, &cached_state, GFP_NOFS); if (ret) { clear_extent_bit(&BTRFS_I(inode)->io_tree, lockstart, @@ -6335,8 +6524,7 @@ static void btrfs_invalidatepage(struct page *page, unsigned long offset) btrfs_releasepage(page, GFP_NOFS); return; } - lock_extent_bits(tree, page_start, page_end, 0, &cached_state, - GFP_NOFS); + lock_extent_bits(tree, page_start, page_end, 0, &cached_state); ordered = btrfs_lookup_ordered_extent(page->mapping->host, page_offset(page)); if (ordered) { @@ -6358,8 +6546,7 @@ static void btrfs_invalidatepage(struct page *page, unsigned long offset) } btrfs_put_ordered_extent(ordered); cached_state = NULL; - lock_extent_bits(tree, page_start, page_end, 0, &cached_state, - GFP_NOFS); + lock_extent_bits(tree, page_start, page_end, 0, &cached_state); } clear_extent_bit(tree, page_start, page_end, EXTENT_LOCKED | EXTENT_DIRTY | EXTENT_DELALLOC | @@ -6434,8 +6621,7 @@ again: } wait_on_page_writeback(page); - lock_extent_bits(io_tree, page_start, page_end, 0, &cached_state, - GFP_NOFS); + lock_extent_bits(io_tree, page_start, page_end, 0, &cached_state); set_page_extent_mapped(page); /* @@ -6696,8 +6882,10 @@ int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, int err; u64 index = 0; - inode = btrfs_new_inode(trans, new_root, NULL, "..", 2, new_dirid, - new_dirid, S_IFDIR | 0700, &index); + inode = btrfs_new_inode(trans, new_root, NULL, "..", 2, + new_dirid, new_dirid, + S_IFDIR | (~current_umask() & S_IRWXUGO), + &index); if (IS_ERR(inode)) return PTR_ERR(inode); inode->i_op = &btrfs_dir_inode_operations; @@ -6707,10 +6895,9 @@ int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, btrfs_i_size_write(inode, 0); err = btrfs_update_inode(trans, new_root, inode); - BUG_ON(err); iput(inode); - return 0; + return err; } struct inode *btrfs_alloc_inode(struct super_block *sb) @@ -6753,6 +6940,8 @@ struct inode *btrfs_alloc_inode(struct super_block *sb) extent_map_tree_init(&ei->extent_tree); extent_io_tree_init(&ei->io_tree, &inode->i_data); extent_io_tree_init(&ei->io_failure_tree, &inode->i_data); + ei->io_tree.track_uptodate = 1; + ei->io_failure_tree.track_uptodate = 1; mutex_init(&ei->log_mutex); mutex_init(&ei->delalloc_mutex); btrfs_ordered_inode_tree_init(&ei->ordered_tree); @@ -7042,7 +7231,10 @@ static int btrfs_rename(struct inode *old_dir, struct dentry *old_dentry, if (!ret) ret = btrfs_update_inode(trans, root, old_inode); } - BUG_ON(ret); + if (ret) { + btrfs_abort_transaction(trans, root, ret); + goto out_fail; + } if (new_inode) { new_inode->i_ctime = CURRENT_TIME; @@ -7060,11 +7252,14 @@ static int btrfs_rename(struct inode *old_dir, struct dentry *old_dentry, new_dentry->d_name.name, new_dentry->d_name.len); } - BUG_ON(ret); - if (new_inode->i_nlink == 0) { + if (!ret && new_inode->i_nlink == 0) { ret = btrfs_orphan_add(trans, new_dentry->d_inode); BUG_ON(ret); } + if (ret) { + btrfs_abort_transaction(trans, root, ret); + goto out_fail; + } } fixup_inode_flags(new_dir, old_inode); @@ -7072,7 +7267,10 @@ static int btrfs_rename(struct inode *old_dir, struct dentry *old_dentry, ret = btrfs_add_link(trans, new_dir, old_inode, new_dentry->d_name.name, new_dentry->d_name.len, 0, index); - BUG_ON(ret); + if (ret) { + btrfs_abort_transaction(trans, root, ret); + goto out_fail; + } if (old_ino != BTRFS_FIRST_FREE_OBJECTID) { struct dentry *parent = new_dentry->d_parent; @@ -7285,7 +7483,7 @@ static int __btrfs_prealloc_file_range(struct inode *inode, int mode, } ret = btrfs_reserve_extent(trans, root, num_bytes, min_size, - 0, *alloc_hint, (u64)-1, &ins, 1); + 0, *alloc_hint, &ins, 1); if (ret) { if (own_trans) btrfs_end_transaction(trans, root); @@ -7297,7 +7495,12 @@ static int __btrfs_prealloc_file_range(struct inode *inode, int mode, ins.offset, ins.offset, ins.offset, 0, 0, 0, BTRFS_FILE_EXTENT_PREALLOC); - BUG_ON(ret); + if (ret) { + btrfs_abort_transaction(trans, root, ret); + if (own_trans) + btrfs_end_transaction(trans, root); + break; + } btrfs_drop_extent_cache(inode, cur_offset, cur_offset + ins.offset -1, 0); @@ -7319,7 +7522,13 @@ static int __btrfs_prealloc_file_range(struct inode *inode, int mode, } ret = btrfs_update_inode(trans, root, inode); - BUG_ON(ret); + + if (ret) { + btrfs_abort_transaction(trans, root, ret); + if (own_trans) + btrfs_end_transaction(trans, root); + break; + } if (own_trans) btrfs_end_transaction(trans, root); diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 03bb62a..18cc23d 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -425,22 +425,37 @@ static noinline int create_subvol(struct btrfs_root *root, key.offset = (u64)-1; new_root = btrfs_read_fs_root_no_name(root->fs_info, &key); - BUG_ON(IS_ERR(new_root)); + if (IS_ERR(new_root)) { + btrfs_abort_transaction(trans, root, PTR_ERR(new_root)); + ret = PTR_ERR(new_root); + goto fail; + } btrfs_record_root_in_trans(trans, new_root); ret = btrfs_create_subvol_root(trans, new_root, new_dirid); + if (ret) { + /* We potentially lose an unused inode item here */ + btrfs_abort_transaction(trans, root, ret); + goto fail; + } + /* * insert the directory item */ ret = btrfs_set_inode_index(dir, &index); - BUG_ON(ret); + if (ret) { + btrfs_abort_transaction(trans, root, ret); + goto fail; + } ret = btrfs_insert_dir_item(trans, root, name, namelen, dir, &key, BTRFS_FT_DIR, index); - if (ret) + if (ret) { + btrfs_abort_transaction(trans, root, ret); goto fail; + } btrfs_i_size_write(dir, dir->i_size + namelen * 2); ret = btrfs_update_inode(trans, root, dir); @@ -769,6 +784,31 @@ none: return -ENOENT; } +/* + * Validaty check of prev em and next em: + * 1) no prev/next em + * 2) prev/next em is an hole/inline extent + */ +static int check_adjacent_extents(struct inode *inode, struct extent_map *em) +{ + struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; + struct extent_map *prev = NULL, *next = NULL; + int ret = 0; + + read_lock(&em_tree->lock); + prev = lookup_extent_mapping(em_tree, em->start - 1, (u64)-1); + next = lookup_extent_mapping(em_tree, em->start + em->len, (u64)-1); + read_unlock(&em_tree->lock); + + if ((!prev || prev->block_start >= EXTENT_MAP_LAST_BYTE) && + (!next || next->block_start >= EXTENT_MAP_LAST_BYTE)) + ret = 1; + free_extent_map(prev); + free_extent_map(next); + + return ret; +} + static int should_defrag_range(struct inode *inode, u64 start, u64 len, int thresh, u64 *last_len, u64 *skip, u64 *defrag_end) @@ -797,17 +837,25 @@ static int should_defrag_range(struct inode *inode, u64 start, u64 len, if (!em) { /* get the big lock and read metadata off disk */ - lock_extent(io_tree, start, start + len - 1, GFP_NOFS); + lock_extent(io_tree, start, start + len - 1); em = btrfs_get_extent(inode, NULL, 0, start, len, 0); - unlock_extent(io_tree, start, start + len - 1, GFP_NOFS); + unlock_extent(io_tree, start, start + len - 1); if (IS_ERR(em)) return 0; } /* this will cover holes, and inline extents */ - if (em->block_start >= EXTENT_MAP_LAST_BYTE) + if (em->block_start >= EXTENT_MAP_LAST_BYTE) { ret = 0; + goto out; + } + + /* If we have nothing to merge with us, just skip. */ + if (check_adjacent_extents(inode, em)) { + ret = 0; + goto out; + } /* * we hit a real extent, if it is big don't bother defragging it again @@ -815,6 +863,7 @@ static int should_defrag_range(struct inode *inode, u64 start, u64 len, if ((*last_len == 0 || *last_len >= thresh) && em->len >= thresh) ret = 0; +out: /* * last_len ends up being a counter of how many bytes we've defragged. * every time we choose not to defrag an extent, we reset *last_len @@ -856,33 +905,62 @@ static int cluster_pages_for_defrag(struct inode *inode, u64 isize = i_size_read(inode); u64 page_start; u64 page_end; + u64 page_cnt; int ret; int i; int i_done; struct btrfs_ordered_extent *ordered; struct extent_state *cached_state = NULL; + struct extent_io_tree *tree; gfp_t mask = btrfs_alloc_write_mask(inode->i_mapping); - if (isize == 0) - return 0; file_end = (isize - 1) >> PAGE_CACHE_SHIFT; + if (!isize || start_index > file_end) + return 0; + + page_cnt = min_t(u64, (u64)num_pages, (u64)file_end - start_index + 1); ret = btrfs_delalloc_reserve_space(inode, - num_pages << PAGE_CACHE_SHIFT); + page_cnt << PAGE_CACHE_SHIFT); if (ret) return ret; -again: - ret = 0; i_done = 0; + tree = &BTRFS_I(inode)->io_tree; /* step one, lock all the pages */ - for (i = 0; i < num_pages; i++) { + for (i = 0; i < page_cnt; i++) { struct page *page; +again: page = find_or_create_page(inode->i_mapping, - start_index + i, mask); + start_index + i, mask); if (!page) break; + page_start = page_offset(page); + page_end = page_start + PAGE_CACHE_SIZE - 1; + while (1) { + lock_extent(tree, page_start, page_end); + ordered = btrfs_lookup_ordered_extent(inode, + page_start); + unlock_extent(tree, page_start, page_end); + if (!ordered) + break; + + unlock_page(page); + btrfs_start_ordered_extent(inode, ordered, 1); + btrfs_put_ordered_extent(ordered); + lock_page(page); + /* + * we unlocked the page above, so we need check if + * it was released or not. + */ + if (page->mapping != inode->i_mapping) { + unlock_page(page); + page_cache_release(page); + goto again; + } + } + if (!PageUptodate(page)) { btrfs_readpage(NULL, page); lock_page(page); @@ -893,15 +971,13 @@ again: break; } } - isize = i_size_read(inode); - file_end = (isize - 1) >> PAGE_CACHE_SHIFT; - if (!isize || page->index > file_end || - page->mapping != inode->i_mapping) { - /* whoops, we blew past eof, skip this page */ + + if (page->mapping != inode->i_mapping) { unlock_page(page); page_cache_release(page); - break; + goto again; } + pages[i] = page; i_done++; } @@ -922,38 +998,18 @@ again: page_end = page_offset(pages[i_done - 1]) + PAGE_CACHE_SIZE; lock_extent_bits(&BTRFS_I(inode)->io_tree, - page_start, page_end - 1, 0, &cached_state, - GFP_NOFS); - ordered = btrfs_lookup_first_ordered_extent(inode, page_end - 1); - if (ordered && - ordered->file_offset + ordered->len > page_start && - ordered->file_offset < page_end) { - btrfs_put_ordered_extent(ordered); - unlock_extent_cached(&BTRFS_I(inode)->io_tree, - page_start, page_end - 1, - &cached_state, GFP_NOFS); - for (i = 0; i < i_done; i++) { - unlock_page(pages[i]); - page_cache_release(pages[i]); - } - btrfs_wait_ordered_range(inode, page_start, - page_end - page_start); - goto again; - } - if (ordered) - btrfs_put_ordered_extent(ordered); - + page_start, page_end - 1, 0, &cached_state); clear_extent_bit(&BTRFS_I(inode)->io_tree, page_start, page_end - 1, EXTENT_DIRTY | EXTENT_DELALLOC | EXTENT_DO_ACCOUNTING, 0, 0, &cached_state, GFP_NOFS); - if (i_done != num_pages) { + if (i_done != page_cnt) { spin_lock(&BTRFS_I(inode)->lock); BTRFS_I(inode)->outstanding_extents++; spin_unlock(&BTRFS_I(inode)->lock); btrfs_delalloc_release_space(inode, - (num_pages - i_done) << PAGE_CACHE_SHIFT); + (page_cnt - i_done) << PAGE_CACHE_SHIFT); } @@ -978,7 +1034,7 @@ out: unlock_page(pages[i]); page_cache_release(pages[i]); } - btrfs_delalloc_release_space(inode, num_pages << PAGE_CACHE_SHIFT); + btrfs_delalloc_release_space(inode, page_cnt << PAGE_CACHE_SHIFT); return ret; } @@ -1084,12 +1140,9 @@ int btrfs_defrag_file(struct inode *inode, struct file *file, if (!(inode->i_sb->s_flags & MS_ACTIVE)) break; - if (!newer_than && - !should_defrag_range(inode, (u64)i << PAGE_CACHE_SHIFT, - PAGE_CACHE_SIZE, - extent_thresh, - &last_len, &skip, - &defrag_end)) { + if (!should_defrag_range(inode, (u64)i << PAGE_CACHE_SHIFT, + PAGE_CACHE_SIZE, extent_thresh, + &last_len, &skip, &defrag_end)) { unsigned long next; /* * the should_defrag function tells us how much to skip @@ -1118,17 +1171,24 @@ int btrfs_defrag_file(struct inode *inode, struct file *file, ra_index += max_cluster; } + mutex_lock(&inode->i_mutex); ret = cluster_pages_for_defrag(inode, pages, i, cluster); - if (ret < 0) + if (ret < 0) { + mutex_unlock(&inode->i_mutex); goto out_ra; + } defrag_count += ret; balance_dirty_pages_ratelimited_nr(inode->i_mapping, ret); + mutex_unlock(&inode->i_mutex); if (newer_than) { if (newer_off == (u64)-1) break; + if (ret > 0) + i += ret; + newer_off = max(newer_off + 1, (u64)i << PAGE_CACHE_SHIFT); @@ -1327,6 +1387,12 @@ static noinline int btrfs_ioctl_snap_create_transid(struct file *file, goto out; } + if (name[0] == '.' && + (namelen == 1 || (name[1] == '.' && namelen == 2))) { + ret = -EEXIST; + goto out; + } + if (subvol) { ret = btrfs_mksubvol(&file->f_path, name, namelen, NULL, transid, readonly); @@ -1955,7 +2021,11 @@ static noinline int btrfs_ioctl_snap_destroy(struct file *file, dest->root_key.objectid, dentry->d_name.name, dentry->d_name.len); - BUG_ON(ret); + if (ret) { + err = ret; + btrfs_abort_transaction(trans, root, ret); + goto out_end_trans; + } btrfs_record_root_in_trans(trans, dest); @@ -1968,11 +2038,16 @@ static noinline int btrfs_ioctl_snap_destroy(struct file *file, ret = btrfs_insert_orphan_item(trans, root->fs_info->tree_root, dest->root_key.objectid); - BUG_ON(ret); + if (ret) { + btrfs_abort_transaction(trans, root, ret); + err = ret; + goto out_end_trans; + } } - +out_end_trans: ret = btrfs_end_transaction(trans, root); - BUG_ON(ret); + if (ret && !err) + err = ret; inode->i_flags |= S_DEAD; out_up_write: up_write(&root->fs_info->subvol_sem); @@ -2315,13 +2390,13 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, another, and lock file content */ while (1) { struct btrfs_ordered_extent *ordered; - lock_extent(&BTRFS_I(src)->io_tree, off, off+len, GFP_NOFS); + lock_extent(&BTRFS_I(src)->io_tree, off, off+len); ordered = btrfs_lookup_first_ordered_extent(src, off+len); if (!ordered && !test_range_bit(&BTRFS_I(src)->io_tree, off, off+len, EXTENT_DELALLOC, 0, NULL)) break; - unlock_extent(&BTRFS_I(src)->io_tree, off, off+len, GFP_NOFS); + unlock_extent(&BTRFS_I(src)->io_tree, off, off+len); if (ordered) btrfs_put_ordered_extent(ordered); btrfs_wait_ordered_range(src, off, len); @@ -2436,11 +2511,21 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, new_key.offset, new_key.offset + datal, &hint_byte, 1); - BUG_ON(ret); + if (ret) { + btrfs_abort_transaction(trans, root, + ret); + btrfs_end_transaction(trans, root); + goto out; + } ret = btrfs_insert_empty_item(trans, root, path, &new_key, size); - BUG_ON(ret); + if (ret) { + btrfs_abort_transaction(trans, root, + ret); + btrfs_end_transaction(trans, root); + goto out; + } leaf = path->nodes[0]; slot = path->slots[0]; @@ -2467,7 +2552,15 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, btrfs_ino(inode), new_key.offset - datao, 0); - BUG_ON(ret); + if (ret) { + btrfs_abort_transaction(trans, + root, + ret); + btrfs_end_transaction(trans, + root); + goto out; + + } } } else if (type == BTRFS_FILE_EXTENT_INLINE) { u64 skip = 0; @@ -2492,11 +2585,21 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, new_key.offset, new_key.offset + datal, &hint_byte, 1); - BUG_ON(ret); + if (ret) { + btrfs_abort_transaction(trans, root, + ret); + btrfs_end_transaction(trans, root); + goto out; + } ret = btrfs_insert_empty_item(trans, root, path, &new_key, size); - BUG_ON(ret); + if (ret) { + btrfs_abort_transaction(trans, root, + ret); + btrfs_end_transaction(trans, root); + goto out; + } if (skip) { u32 start = @@ -2530,8 +2633,12 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, btrfs_i_size_write(inode, endoff); ret = btrfs_update_inode(trans, root, inode); - BUG_ON(ret); - btrfs_end_transaction(trans, root); + if (ret) { + btrfs_abort_transaction(trans, root, ret); + btrfs_end_transaction(trans, root); + goto out; + } + ret = btrfs_end_transaction(trans, root); } next: btrfs_release_path(path); @@ -2540,7 +2647,7 @@ next: ret = 0; out: btrfs_release_path(path); - unlock_extent(&BTRFS_I(src)->io_tree, off, off+len, GFP_NOFS); + unlock_extent(&BTRFS_I(src)->io_tree, off, off+len); out_unlock: mutex_unlock(&src->i_mutex); mutex_unlock(&inode->i_mutex); @@ -3055,8 +3162,8 @@ static long btrfs_ioctl_logical_to_ino(struct btrfs_root *root, goto out; extent_item_pos = loi->logical - key.objectid; - ret = iterate_extent_inodes(root->fs_info, path, key.objectid, - extent_item_pos, build_ino_list, + ret = iterate_extent_inodes(root->fs_info, key.objectid, + extent_item_pos, 0, build_ino_list, inodes); if (ret < 0) diff --git a/fs/btrfs/locking.c b/fs/btrfs/locking.c index 5e178d8..272f911 100644 --- a/fs/btrfs/locking.c +++ b/fs/btrfs/locking.c @@ -208,7 +208,7 @@ void btrfs_tree_read_unlock_blocking(struct extent_buffer *eb) * take a spinning write lock. This will wait for both * blocking readers or writers */ -int btrfs_tree_lock(struct extent_buffer *eb) +void btrfs_tree_lock(struct extent_buffer *eb) { again: wait_event(eb->read_lock_wq, atomic_read(&eb->blocking_readers) == 0); @@ -230,13 +230,12 @@ again: atomic_inc(&eb->spinning_writers); atomic_inc(&eb->write_locks); eb->lock_owner = current->pid; - return 0; } /* * drop a spinning or a blocking write lock. */ -int btrfs_tree_unlock(struct extent_buffer *eb) +void btrfs_tree_unlock(struct extent_buffer *eb) { int blockers = atomic_read(&eb->blocking_writers); @@ -255,7 +254,6 @@ int btrfs_tree_unlock(struct extent_buffer *eb) atomic_dec(&eb->spinning_writers); write_unlock(&eb->lock); } - return 0; } void btrfs_assert_tree_locked(struct extent_buffer *eb) diff --git a/fs/btrfs/locking.h b/fs/btrfs/locking.h index 17247dd..ca52681 100644 --- a/fs/btrfs/locking.h +++ b/fs/btrfs/locking.h @@ -24,8 +24,8 @@ #define BTRFS_WRITE_LOCK_BLOCKING 3 #define BTRFS_READ_LOCK_BLOCKING 4 -int btrfs_tree_lock(struct extent_buffer *eb); -int btrfs_tree_unlock(struct extent_buffer *eb); +void btrfs_tree_lock(struct extent_buffer *eb); +void btrfs_tree_unlock(struct extent_buffer *eb); int btrfs_try_spin_lock(struct extent_buffer *eb); void btrfs_tree_read_lock(struct extent_buffer *eb); diff --git a/fs/btrfs/lzo.c b/fs/btrfs/lzo.c index a178f5e..743b86f 100644 --- a/fs/btrfs/lzo.c +++ b/fs/btrfs/lzo.c @@ -411,9 +411,9 @@ static int lzo_decompress(struct list_head *ws, unsigned char *data_in, bytes = min_t(unsigned long, destlen, out_len - start_byte); - kaddr = kmap_atomic(dest_page, KM_USER0); + kaddr = kmap_atomic(dest_page); memcpy(kaddr, workspace->buf + start_byte, bytes); - kunmap_atomic(kaddr, KM_USER0); + kunmap_atomic(kaddr); out: return ret; } diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c index a1c9404..bbf6d0d 100644 --- a/fs/btrfs/ordered-data.c +++ b/fs/btrfs/ordered-data.c @@ -59,6 +59,14 @@ static struct rb_node *tree_insert(struct rb_root *root, u64 file_offset, return NULL; } +static void ordered_data_tree_panic(struct inode *inode, int errno, + u64 offset) +{ + struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb); + btrfs_panic(fs_info, errno, "Inconsistency in ordered tree at offset " + "%llu\n", (unsigned long long)offset); +} + /* * look for a given offset in the tree, and if it can't be found return the * first lesser offset @@ -207,7 +215,8 @@ static int __btrfs_add_ordered_extent(struct inode *inode, u64 file_offset, spin_lock(&tree->lock); node = tree_insert(&tree->tree, file_offset, &entry->rb_node); - BUG_ON(node); + if (node) + ordered_data_tree_panic(inode, -EEXIST, file_offset); spin_unlock(&tree->lock); spin_lock(&BTRFS_I(inode)->root->fs_info->ordered_extent_lock); @@ -215,7 +224,6 @@ static int __btrfs_add_ordered_extent(struct inode *inode, u64 file_offset, &BTRFS_I(inode)->root->fs_info->ordered_extents); spin_unlock(&BTRFS_I(inode)->root->fs_info->ordered_extent_lock); - BUG_ON(node); return 0; } @@ -249,9 +257,9 @@ int btrfs_add_ordered_extent_compress(struct inode *inode, u64 file_offset, * when an ordered extent is finished. If the list covers more than one * ordered extent, it is split across multiples. */ -int btrfs_add_ordered_sum(struct inode *inode, - struct btrfs_ordered_extent *entry, - struct btrfs_ordered_sum *sum) +void btrfs_add_ordered_sum(struct inode *inode, + struct btrfs_ordered_extent *entry, + struct btrfs_ordered_sum *sum) { struct btrfs_ordered_inode_tree *tree; @@ -259,7 +267,6 @@ int btrfs_add_ordered_sum(struct inode *inode, spin_lock(&tree->lock); list_add_tail(&sum->list, &entry->list); spin_unlock(&tree->lock); - return 0; } /* @@ -384,7 +391,7 @@ out: * used to drop a reference on an ordered extent. This will free * the extent if the last reference is dropped */ -int btrfs_put_ordered_extent(struct btrfs_ordered_extent *entry) +void btrfs_put_ordered_extent(struct btrfs_ordered_extent *entry) { struct list_head *cur; struct btrfs_ordered_sum *sum; @@ -400,7 +407,6 @@ int btrfs_put_ordered_extent(struct btrfs_ordered_extent *entry) } kfree(entry); } - return 0; } /* @@ -408,8 +414,8 @@ int btrfs_put_ordered_extent(struct btrfs_ordered_extent *entry) * and you must wake_up entry->wait. You must hold the tree lock * while you call this function. */ -static int __btrfs_remove_ordered_extent(struct inode *inode, - struct btrfs_ordered_extent *entry) +static void __btrfs_remove_ordered_extent(struct inode *inode, + struct btrfs_ordered_extent *entry) { struct btrfs_ordered_inode_tree *tree; struct btrfs_root *root = BTRFS_I(inode)->root; @@ -436,35 +442,30 @@ static int __btrfs_remove_ordered_extent(struct inode *inode, list_del_init(&BTRFS_I(inode)->ordered_operations); } spin_unlock(&root->fs_info->ordered_extent_lock); - - return 0; } /* * remove an ordered extent from the tree. No references are dropped * but any waiters are woken. */ -int btrfs_remove_ordered_extent(struct inode *inode, - struct btrfs_ordered_extent *entry) +void btrfs_remove_ordered_extent(struct inode *inode, + struct btrfs_ordered_extent *entry) { struct btrfs_ordered_inode_tree *tree; - int ret; tree = &BTRFS_I(inode)->ordered_tree; spin_lock(&tree->lock); - ret = __btrfs_remove_ordered_extent(inode, entry); + __btrfs_remove_ordered_extent(inode, entry); spin_unlock(&tree->lock); wake_up(&entry->wait); - - return ret; } /* * wait for all the ordered extents in a root. This is done when balancing * space between drives. */ -int btrfs_wait_ordered_extents(struct btrfs_root *root, - int nocow_only, int delay_iput) +void btrfs_wait_ordered_extents(struct btrfs_root *root, + int nocow_only, int delay_iput) { struct list_head splice; struct list_head *cur; @@ -512,7 +513,6 @@ int btrfs_wait_ordered_extents(struct btrfs_root *root, spin_lock(&root->fs_info->ordered_extent_lock); } spin_unlock(&root->fs_info->ordered_extent_lock); - return 0; } /* @@ -525,7 +525,7 @@ int btrfs_wait_ordered_extents(struct btrfs_root *root, * extra check to make sure the ordered operation list really is empty * before we return */ -int btrfs_run_ordered_operations(struct btrfs_root *root, int wait) +void btrfs_run_ordered_operations(struct btrfs_root *root, int wait) { struct btrfs_inode *btrfs_inode; struct inode *inode; @@ -573,8 +573,6 @@ again: spin_unlock(&root->fs_info->ordered_extent_lock); mutex_unlock(&root->fs_info->ordered_operations_mutex); - - return 0; } /* @@ -609,7 +607,7 @@ void btrfs_start_ordered_extent(struct inode *inode, /* * Used to wait on ordered extents across a large range of bytes. */ -int btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len) +void btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len) { u64 end; u64 orig_end; @@ -664,7 +662,6 @@ again: schedule_timeout(1); goto again; } - return 0; } /* @@ -948,9 +945,8 @@ out: * If trans is not null, we'll do a friendly check for a transaction that * is already flushing things and force the IO down ourselves. */ -int btrfs_add_ordered_operation(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - struct inode *inode) +void btrfs_add_ordered_operation(struct btrfs_trans_handle *trans, + struct btrfs_root *root, struct inode *inode) { u64 last_mod; @@ -961,7 +957,7 @@ int btrfs_add_ordered_operation(struct btrfs_trans_handle *trans, * commit, we can safely return without doing anything */ if (last_mod < root->fs_info->last_trans_committed) - return 0; + return; /* * the transaction is already committing. Just start the IO and @@ -969,7 +965,7 @@ int btrfs_add_ordered_operation(struct btrfs_trans_handle *trans, */ if (trans && root->fs_info->running_transaction->blocked) { btrfs_wait_ordered_range(inode, 0, (u64)-1); - return 0; + return; } spin_lock(&root->fs_info->ordered_extent_lock); @@ -978,6 +974,4 @@ int btrfs_add_ordered_operation(struct btrfs_trans_handle *trans, &root->fs_info->ordered_operations); } spin_unlock(&root->fs_info->ordered_extent_lock); - - return 0; } diff --git a/fs/btrfs/ordered-data.h b/fs/btrfs/ordered-data.h index ff1f69a..c355ad4 100644 --- a/fs/btrfs/ordered-data.h +++ b/fs/btrfs/ordered-data.h @@ -138,8 +138,8 @@ btrfs_ordered_inode_tree_init(struct btrfs_ordered_inode_tree *t) t->last = NULL; } -int btrfs_put_ordered_extent(struct btrfs_ordered_extent *entry); -int btrfs_remove_ordered_extent(struct inode *inode, +void btrfs_put_ordered_extent(struct btrfs_ordered_extent *entry); +void btrfs_remove_ordered_extent(struct inode *inode, struct btrfs_ordered_extent *entry); int btrfs_dec_test_ordered_pending(struct inode *inode, struct btrfs_ordered_extent **cached, @@ -154,14 +154,14 @@ int btrfs_add_ordered_extent_dio(struct inode *inode, u64 file_offset, int btrfs_add_ordered_extent_compress(struct inode *inode, u64 file_offset, u64 start, u64 len, u64 disk_len, int type, int compress_type); -int btrfs_add_ordered_sum(struct inode *inode, - struct btrfs_ordered_extent *entry, - struct btrfs_ordered_sum *sum); +void btrfs_add_ordered_sum(struct inode *inode, + struct btrfs_ordered_extent *entry, + struct btrfs_ordered_sum *sum); struct btrfs_ordered_extent *btrfs_lookup_ordered_extent(struct inode *inode, u64 file_offset); void btrfs_start_ordered_extent(struct inode *inode, struct btrfs_ordered_extent *entry, int wait); -int btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len); +void btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len); struct btrfs_ordered_extent * btrfs_lookup_first_ordered_extent(struct inode * inode, u64 file_offset); struct btrfs_ordered_extent *btrfs_lookup_ordered_range(struct inode *inode, @@ -170,10 +170,10 @@ struct btrfs_ordered_extent *btrfs_lookup_ordered_range(struct inode *inode, int btrfs_ordered_update_i_size(struct inode *inode, u64 offset, struct btrfs_ordered_extent *ordered); int btrfs_find_ordered_sum(struct inode *inode, u64 offset, u64 disk_bytenr, u32 *sum); -int btrfs_run_ordered_operations(struct btrfs_root *root, int wait); -int btrfs_add_ordered_operation(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - struct inode *inode); -int btrfs_wait_ordered_extents(struct btrfs_root *root, - int nocow_only, int delay_iput); +void btrfs_run_ordered_operations(struct btrfs_root *root, int wait); +void btrfs_add_ordered_operation(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct inode *inode); +void btrfs_wait_ordered_extents(struct btrfs_root *root, + int nocow_only, int delay_iput); #endif diff --git a/fs/btrfs/orphan.c b/fs/btrfs/orphan.c index f8be250..24cad16 100644 --- a/fs/btrfs/orphan.c +++ b/fs/btrfs/orphan.c @@ -58,7 +58,7 @@ int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, ret = btrfs_search_slot(trans, root, &key, path, -1, 1); if (ret < 0) goto out; - if (ret) { + if (ret) { /* JDM: Really? */ ret = -ENOENT; goto out; } diff --git a/fs/btrfs/reada.c b/fs/btrfs/reada.c index 2373b39..dc5d331 100644 --- a/fs/btrfs/reada.c +++ b/fs/btrfs/reada.c @@ -54,7 +54,6 @@ * than the 2 started one after another. */ -#define MAX_MIRRORS 2 #define MAX_IN_FLIGHT 6 struct reada_extctl { @@ -71,7 +70,7 @@ struct reada_extent { struct list_head extctl; struct kref refcnt; spinlock_t lock; - struct reada_zone *zones[MAX_MIRRORS]; + struct reada_zone *zones[BTRFS_MAX_MIRRORS]; int nzones; struct btrfs_device *scheduled_for; }; @@ -84,7 +83,8 @@ struct reada_zone { spinlock_t lock; int locked; struct btrfs_device *device; - struct btrfs_device *devs[MAX_MIRRORS]; /* full list, incl self */ + struct btrfs_device *devs[BTRFS_MAX_MIRRORS]; /* full list, incl + * self */ int ndevs; struct kref refcnt; }; @@ -305,7 +305,7 @@ again: spin_lock(&fs_info->reada_lock); ret = radix_tree_insert(&dev->reada_zones, - (unsigned long)zone->end >> PAGE_CACHE_SHIFT, + (unsigned long)(zone->end >> PAGE_CACHE_SHIFT), zone); spin_unlock(&fs_info->reada_lock); @@ -365,9 +365,9 @@ again: if (ret || !bbio || length < blocksize) goto error; - if (bbio->num_stripes > MAX_MIRRORS) { + if (bbio->num_stripes > BTRFS_MAX_MIRRORS) { printk(KERN_ERR "btrfs readahead: more than %d copies not " - "supported", MAX_MIRRORS); + "supported", BTRFS_MAX_MIRRORS); goto error; } diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c index 8c1aae2..017281d 100644 --- a/fs/btrfs/relocation.c +++ b/fs/btrfs/relocation.c @@ -326,6 +326,19 @@ static struct rb_node *tree_search(struct rb_root *root, u64 bytenr) return NULL; } +void backref_tree_panic(struct rb_node *rb_node, int errno, + u64 bytenr) +{ + + struct btrfs_fs_info *fs_info = NULL; + struct backref_node *bnode = rb_entry(rb_node, struct backref_node, + rb_node); + if (bnode->root) + fs_info = bnode->root->fs_info; + btrfs_panic(fs_info, errno, "Inconsistency in backref cache " + "found at offset %llu\n", (unsigned long long)bytenr); +} + /* * walk up backref nodes until reach node presents tree root */ @@ -452,7 +465,8 @@ static void update_backref_node(struct backref_cache *cache, rb_erase(&node->rb_node, &cache->rb_root); node->bytenr = bytenr; rb_node = tree_insert(&cache->rb_root, node->bytenr, &node->rb_node); - BUG_ON(rb_node); + if (rb_node) + backref_tree_panic(rb_node, -EEXIST, bytenr); } /* @@ -999,7 +1013,8 @@ next: if (!cowonly) { rb_node = tree_insert(&cache->rb_root, node->bytenr, &node->rb_node); - BUG_ON(rb_node); + if (rb_node) + backref_tree_panic(rb_node, -EEXIST, node->bytenr); list_add_tail(&node->lower, &cache->leaves); } @@ -1034,7 +1049,9 @@ next: if (!cowonly) { rb_node = tree_insert(&cache->rb_root, upper->bytenr, &upper->rb_node); - BUG_ON(rb_node); + if (rb_node) + backref_tree_panic(rb_node, -EEXIST, + upper->bytenr); } list_add_tail(&edge->list[UPPER], &upper->lower); @@ -1180,7 +1197,8 @@ static int clone_backref_node(struct btrfs_trans_handle *trans, rb_node = tree_insert(&cache->rb_root, new_node->bytenr, &new_node->rb_node); - BUG_ON(rb_node); + if (rb_node) + backref_tree_panic(rb_node, -EEXIST, new_node->bytenr); if (!new_node->lowest) { list_for_each_entry(new_edge, &new_node->lower, list[UPPER]) { @@ -1203,14 +1221,15 @@ fail: /* * helper to add 'address of tree root -> reloc tree' mapping */ -static int __add_reloc_root(struct btrfs_root *root) +static int __must_check __add_reloc_root(struct btrfs_root *root) { struct rb_node *rb_node; struct mapping_node *node; struct reloc_control *rc = root->fs_info->reloc_ctl; node = kmalloc(sizeof(*node), GFP_NOFS); - BUG_ON(!node); + if (!node) + return -ENOMEM; node->bytenr = root->node->start; node->data = root; @@ -1219,7 +1238,12 @@ static int __add_reloc_root(struct btrfs_root *root) rb_node = tree_insert(&rc->reloc_root_tree.rb_root, node->bytenr, &node->rb_node); spin_unlock(&rc->reloc_root_tree.lock); - BUG_ON(rb_node); + if (rb_node) { + kfree(node); + btrfs_panic(root->fs_info, -EEXIST, "Duplicate root found " + "for start=%llu while inserting into relocation " + "tree\n"); + } list_add_tail(&root->root_list, &rc->reloc_roots); return 0; @@ -1252,7 +1276,8 @@ static int __update_reloc_root(struct btrfs_root *root, int del) rb_node = tree_insert(&rc->reloc_root_tree.rb_root, node->bytenr, &node->rb_node); spin_unlock(&rc->reloc_root_tree.lock); - BUG_ON(rb_node); + if (rb_node) + backref_tree_panic(rb_node, -EEXIST, node->bytenr); } else { list_del_init(&root->root_list); kfree(node); @@ -1334,6 +1359,7 @@ int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, struct btrfs_root *reloc_root; struct reloc_control *rc = root->fs_info->reloc_ctl; int clear_rsv = 0; + int ret; if (root->reloc_root) { reloc_root = root->reloc_root; @@ -1353,7 +1379,8 @@ int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, if (clear_rsv) trans->block_rsv = NULL; - __add_reloc_root(reloc_root); + ret = __add_reloc_root(reloc_root); + BUG_ON(ret < 0); root->reloc_root = reloc_root; return 0; } @@ -1577,15 +1604,14 @@ int replace_file_extents(struct btrfs_trans_handle *trans, WARN_ON(!IS_ALIGNED(end, root->sectorsize)); end--; ret = try_lock_extent(&BTRFS_I(inode)->io_tree, - key.offset, end, - GFP_NOFS); + key.offset, end); if (!ret) continue; btrfs_drop_extent_cache(inode, key.offset, end, 1); unlock_extent(&BTRFS_I(inode)->io_tree, - key.offset, end, GFP_NOFS); + key.offset, end); } } @@ -1956,9 +1982,9 @@ static int invalidate_extent_cache(struct btrfs_root *root, } /* the lock_extent waits for readpage to complete */ - lock_extent(&BTRFS_I(inode)->io_tree, start, end, GFP_NOFS); + lock_extent(&BTRFS_I(inode)->io_tree, start, end); btrfs_drop_extent_cache(inode, start, end, 1); - unlock_extent(&BTRFS_I(inode)->io_tree, start, end, GFP_NOFS); + unlock_extent(&BTRFS_I(inode)->io_tree, start, end); } return 0; } @@ -2246,7 +2272,8 @@ again: } else { list_del_init(&reloc_root->root_list); } - btrfs_drop_snapshot(reloc_root, rc->block_rsv, 0, 1); + ret = btrfs_drop_snapshot(reloc_root, rc->block_rsv, 0, 1); + BUG_ON(ret < 0); } if (found) { @@ -2862,12 +2889,12 @@ int prealloc_file_extent_cluster(struct inode *inode, else end = cluster->end - offset; - lock_extent(&BTRFS_I(inode)->io_tree, start, end, GFP_NOFS); + lock_extent(&BTRFS_I(inode)->io_tree, start, end); num_bytes = end + 1 - start; ret = btrfs_prealloc_file_range(inode, 0, start, num_bytes, num_bytes, end + 1, &alloc_hint); - unlock_extent(&BTRFS_I(inode)->io_tree, start, end, GFP_NOFS); + unlock_extent(&BTRFS_I(inode)->io_tree, start, end); if (ret) break; nr++; @@ -2899,7 +2926,7 @@ int setup_extent_mapping(struct inode *inode, u64 start, u64 end, em->bdev = root->fs_info->fs_devices->latest_bdev; set_bit(EXTENT_FLAG_PINNED, &em->flags); - lock_extent(&BTRFS_I(inode)->io_tree, start, end, GFP_NOFS); + lock_extent(&BTRFS_I(inode)->io_tree, start, end); while (1) { write_lock(&em_tree->lock); ret = add_extent_mapping(em_tree, em); @@ -2910,7 +2937,7 @@ int setup_extent_mapping(struct inode *inode, u64 start, u64 end, } btrfs_drop_extent_cache(inode, start, end, 0); } - unlock_extent(&BTRFS_I(inode)->io_tree, start, end, GFP_NOFS); + unlock_extent(&BTRFS_I(inode)->io_tree, start, end); return ret; } @@ -2990,8 +3017,7 @@ static int relocate_file_extent_cluster(struct inode *inode, page_start = (u64)page->index << PAGE_CACHE_SHIFT; page_end = page_start + PAGE_CACHE_SIZE - 1; - lock_extent(&BTRFS_I(inode)->io_tree, - page_start, page_end, GFP_NOFS); + lock_extent(&BTRFS_I(inode)->io_tree, page_start, page_end); set_page_extent_mapped(page); @@ -3007,7 +3033,7 @@ static int relocate_file_extent_cluster(struct inode *inode, set_page_dirty(page); unlock_extent(&BTRFS_I(inode)->io_tree, - page_start, page_end, GFP_NOFS); + page_start, page_end); unlock_page(page); page_cache_release(page); @@ -3154,7 +3180,8 @@ static int add_tree_block(struct reloc_control *rc, block->key_ready = 0; rb_node = tree_insert(blocks, block->bytenr, &block->rb_node); - BUG_ON(rb_node); + if (rb_node) + backref_tree_panic(rb_node, -EEXIST, block->bytenr); return 0; } @@ -3426,7 +3453,9 @@ static int find_data_references(struct reloc_control *rc, block->key_ready = 1; rb_node = tree_insert(blocks, block->bytenr, &block->rb_node); - BUG_ON(rb_node); + if (rb_node) + backref_tree_panic(rb_node, -EEXIST, + block->bytenr); } if (counted) added = 1; @@ -4073,10 +4102,11 @@ out: static noinline_for_stack int mark_garbage_root(struct btrfs_root *root) { struct btrfs_trans_handle *trans; - int ret; + int ret, err; trans = btrfs_start_transaction(root->fs_info->tree_root, 0); - BUG_ON(IS_ERR(trans)); + if (IS_ERR(trans)) + return PTR_ERR(trans); memset(&root->root_item.drop_progress, 0, sizeof(root->root_item.drop_progress)); @@ -4084,11 +4114,11 @@ static noinline_for_stack int mark_garbage_root(struct btrfs_root *root) btrfs_set_root_refs(&root->root_item, 0); ret = btrfs_update_root(trans, root->fs_info->tree_root, &root->root_key, &root->root_item); - BUG_ON(ret); - ret = btrfs_end_transaction(trans, root->fs_info->tree_root); - BUG_ON(ret); - return 0; + err = btrfs_end_transaction(trans, root->fs_info->tree_root); + if (err) + return err; + return ret; } /* @@ -4156,7 +4186,11 @@ int btrfs_recover_relocation(struct btrfs_root *root) err = ret; goto out; } - mark_garbage_root(reloc_root); + ret = mark_garbage_root(reloc_root); + if (ret < 0) { + err = ret; + goto out; + } } } @@ -4202,13 +4236,19 @@ int btrfs_recover_relocation(struct btrfs_root *root) fs_root = read_fs_root(root->fs_info, reloc_root->root_key.offset); - BUG_ON(IS_ERR(fs_root)); + if (IS_ERR(fs_root)) { + err = PTR_ERR(fs_root); + goto out_free; + } - __add_reloc_root(reloc_root); + err = __add_reloc_root(reloc_root); + BUG_ON(err < 0); /* -ENOMEM or logic error */ fs_root->reloc_root = reloc_root; } - btrfs_commit_transaction(trans, rc->extent_root); + err = btrfs_commit_transaction(trans, rc->extent_root); + if (err) + goto out_free; merge_reloc_roots(rc); @@ -4218,7 +4258,7 @@ int btrfs_recover_relocation(struct btrfs_root *root) if (IS_ERR(trans)) err = PTR_ERR(trans); else - btrfs_commit_transaction(trans, rc->extent_root); + err = btrfs_commit_transaction(trans, rc->extent_root); out_free: kfree(rc); out: @@ -4267,6 +4307,8 @@ int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len) disk_bytenr = file_pos + BTRFS_I(inode)->index_cnt; ret = btrfs_lookup_csums_range(root->fs_info->csum_root, disk_bytenr, disk_bytenr + len - 1, &list, 0); + if (ret) + goto out; while (!list_empty(&list)) { sums = list_entry(list.next, struct btrfs_ordered_sum, list); @@ -4284,6 +4326,7 @@ int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len) btrfs_add_ordered_sum(inode, ordered, sums); } +out: btrfs_put_ordered_extent(ordered); return ret; } @@ -4380,7 +4423,7 @@ void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans, * called after snapshot is created. migrate block reservation * and create reloc root for the newly created snapshot */ -void btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, +int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, struct btrfs_pending_snapshot *pending) { struct btrfs_root *root = pending->root; @@ -4390,7 +4433,7 @@ void btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, int ret; if (!root->reloc_root) - return; + return 0; rc = root->fs_info->reloc_ctl; rc->merging_rsv_size += rc->nodes_relocated; @@ -4399,18 +4442,21 @@ void btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, ret = btrfs_block_rsv_migrate(&pending->block_rsv, rc->block_rsv, rc->nodes_relocated); - BUG_ON(ret); + if (ret) + return ret; } new_root = pending->snap; reloc_root = create_reloc_root(trans, root->reloc_root, new_root->root_key.objectid); + if (IS_ERR(reloc_root)) + return PTR_ERR(reloc_root); - __add_reloc_root(reloc_root); + ret = __add_reloc_root(reloc_root); + BUG_ON(ret < 0); new_root->reloc_root = reloc_root; - if (rc->create_reloc_tree) { + if (rc->create_reloc_tree) ret = clone_backref_node(trans, rc, root, reloc_root); - BUG_ON(ret); - } + return ret; } diff --git a/fs/btrfs/root-tree.c b/fs/btrfs/root-tree.c index f409990..24fb8ce 100644 --- a/fs/btrfs/root-tree.c +++ b/fs/btrfs/root-tree.c @@ -93,10 +93,14 @@ int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root unsigned long ptr; path = btrfs_alloc_path(); - BUG_ON(!path); + if (!path) + return -ENOMEM; + ret = btrfs_search_slot(trans, root, key, path, 0, 1); - if (ret < 0) + if (ret < 0) { + btrfs_abort_transaction(trans, root, ret); goto out; + } if (ret != 0) { btrfs_print_leaf(root, path->nodes[0]); @@ -116,13 +120,10 @@ out: return ret; } -int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root - *root, struct btrfs_key *key, struct btrfs_root_item - *item) +int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, + struct btrfs_key *key, struct btrfs_root_item *item) { - int ret; - ret = btrfs_insert_item(trans, root, key, item, sizeof(*item)); - return ret; + return btrfs_insert_item(trans, root, key, item, sizeof(*item)); } /* @@ -384,6 +385,8 @@ int btrfs_find_root_ref(struct btrfs_root *tree_root, * * For a back ref the root_id is the id of the subvol or snapshot and * ref_id is the id of the tree referencing it. + * + * Will return 0, -ENOMEM, or anything from the CoW path */ int btrfs_add_root_ref(struct btrfs_trans_handle *trans, struct btrfs_root *tree_root, @@ -407,7 +410,11 @@ int btrfs_add_root_ref(struct btrfs_trans_handle *trans, again: ret = btrfs_insert_empty_item(trans, tree_root, path, &key, sizeof(*ref) + name_len); - BUG_ON(ret); + if (ret) { + btrfs_abort_transaction(trans, tree_root, ret); + btrfs_free_path(path); + return ret; + } leaf = path->nodes[0]; ref = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_root_ref); diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c index 9770cc5..90acc82 100644 --- a/fs/btrfs/scrub.c +++ b/fs/btrfs/scrub.c @@ -36,37 +36,30 @@ * Future enhancements: * - In case an unrepairable extent is encountered, track which files are * affected and report them - * - In case of a read error on files with nodatasum, map the file and read - * the extent to trigger a writeback of the good copy * - track and record media errors, throw out bad devices * - add a mode to also read unallocated space */ -struct scrub_bio; -struct scrub_page; +struct scrub_block; struct scrub_dev; -static void scrub_bio_end_io(struct bio *bio, int err); -static void scrub_checksum(struct btrfs_work *work); -static int scrub_checksum_data(struct scrub_dev *sdev, - struct scrub_page *spag, void *buffer); -static int scrub_checksum_tree_block(struct scrub_dev *sdev, - struct scrub_page *spag, u64 logical, - void *buffer); -static int scrub_checksum_super(struct scrub_bio *sbio, void *buffer); -static int scrub_fixup_check(struct scrub_bio *sbio, int ix); -static void scrub_fixup_end_io(struct bio *bio, int err); -static int scrub_fixup_io(int rw, struct block_device *bdev, sector_t sector, - struct page *page); -static void scrub_fixup(struct scrub_bio *sbio, int ix); #define SCRUB_PAGES_PER_BIO 16 /* 64k per bio */ #define SCRUB_BIOS_PER_DEV 16 /* 1 MB per device in flight */ +#define SCRUB_MAX_PAGES_PER_BLOCK 16 /* 64k per node/leaf/sector */ struct scrub_page { + struct scrub_block *sblock; + struct page *page; + struct block_device *bdev; u64 flags; /* extent flags */ u64 generation; - int mirror_num; - int have_csum; + u64 logical; + u64 physical; + struct { + unsigned int mirror_num:8; + unsigned int have_csum:1; + unsigned int io_error:1; + }; u8 csum[BTRFS_CSUM_SIZE]; }; @@ -77,12 +70,25 @@ struct scrub_bio { int err; u64 logical; u64 physical; - struct scrub_page spag[SCRUB_PAGES_PER_BIO]; - u64 count; + struct scrub_page *pagev[SCRUB_PAGES_PER_BIO]; + int page_count; int next_free; struct btrfs_work work; }; +struct scrub_block { + struct scrub_page pagev[SCRUB_MAX_PAGES_PER_BLOCK]; + int page_count; + atomic_t outstanding_pages; + atomic_t ref_count; /* free mem on transition to zero */ + struct scrub_dev *sdev; + struct { + unsigned int header_error:1; + unsigned int checksum_error:1; + unsigned int no_io_error_seen:1; + }; +}; + struct scrub_dev { struct scrub_bio *bios[SCRUB_BIOS_PER_DEV]; struct btrfs_device *dev; @@ -96,6 +102,10 @@ struct scrub_dev { struct list_head csum_list; atomic_t cancel_req; int readonly; + int pages_per_bio; /* <= SCRUB_PAGES_PER_BIO */ + u32 sectorsize; + u32 nodesize; + u32 leafsize; /* * statistics */ @@ -124,6 +134,43 @@ struct scrub_warning { int scratch_bufsize; }; + +static int scrub_handle_errored_block(struct scrub_block *sblock_to_check); +static int scrub_setup_recheck_block(struct scrub_dev *sdev, + struct btrfs_mapping_tree *map_tree, + u64 length, u64 logical, + struct scrub_block *sblock); +static int scrub_recheck_block(struct btrfs_fs_info *fs_info, + struct scrub_block *sblock, int is_metadata, + int have_csum, u8 *csum, u64 generation, + u16 csum_size); +static void scrub_recheck_block_checksum(struct btrfs_fs_info *fs_info, + struct scrub_block *sblock, + int is_metadata, int have_csum, + const u8 *csum, u64 generation, + u16 csum_size); +static void scrub_complete_bio_end_io(struct bio *bio, int err); +static int scrub_repair_block_from_good_copy(struct scrub_block *sblock_bad, + struct scrub_block *sblock_good, + int force_write); +static int scrub_repair_page_from_good_copy(struct scrub_block *sblock_bad, + struct scrub_block *sblock_good, + int page_num, int force_write); +static int scrub_checksum_data(struct scrub_block *sblock); +static int scrub_checksum_tree_block(struct scrub_block *sblock); +static int scrub_checksum_super(struct scrub_block *sblock); +static void scrub_block_get(struct scrub_block *sblock); +static void scrub_block_put(struct scrub_block *sblock); +static int scrub_add_page_to_bio(struct scrub_dev *sdev, + struct scrub_page *spage); +static int scrub_pages(struct scrub_dev *sdev, u64 logical, u64 len, + u64 physical, u64 flags, u64 gen, int mirror_num, + u8 *csum, int force); +static void scrub_bio_end_io(struct bio *bio, int err); +static void scrub_bio_end_io_worker(struct btrfs_work *work); +static void scrub_block_complete(struct scrub_block *sblock); + + static void scrub_free_csums(struct scrub_dev *sdev) { while (!list_empty(&sdev->csum_list)) { @@ -135,23 +182,6 @@ static void scrub_free_csums(struct scrub_dev *sdev) } } -static void scrub_free_bio(struct bio *bio) -{ - int i; - struct page *last_page = NULL; - - if (!bio) - return; - - for (i = 0; i < bio->bi_vcnt; ++i) { - if (bio->bi_io_vec[i].bv_page == last_page) - continue; - last_page = bio->bi_io_vec[i].bv_page; - __free_page(last_page); - } - bio_put(bio); -} - static noinline_for_stack void scrub_free_dev(struct scrub_dev *sdev) { int i; @@ -159,13 +189,23 @@ static noinline_for_stack void scrub_free_dev(struct scrub_dev *sdev) if (!sdev) return; + /* this can happen when scrub is cancelled */ + if (sdev->curr != -1) { + struct scrub_bio *sbio = sdev->bios[sdev->curr]; + + for (i = 0; i < sbio->page_count; i++) { + BUG_ON(!sbio->pagev[i]); + BUG_ON(!sbio->pagev[i]->page); + scrub_block_put(sbio->pagev[i]->sblock); + } + bio_put(sbio->bio); + } + for (i = 0; i < SCRUB_BIOS_PER_DEV; ++i) { struct scrub_bio *sbio = sdev->bios[i]; if (!sbio) break; - - scrub_free_bio(sbio->bio); kfree(sbio); } @@ -179,11 +219,16 @@ struct scrub_dev *scrub_setup_dev(struct btrfs_device *dev) struct scrub_dev *sdev; int i; struct btrfs_fs_info *fs_info = dev->dev_root->fs_info; + int pages_per_bio; + pages_per_bio = min_t(int, SCRUB_PAGES_PER_BIO, + bio_get_nr_vecs(dev->bdev)); sdev = kzalloc(sizeof(*sdev), GFP_NOFS); if (!sdev) goto nomem; sdev->dev = dev; + sdev->pages_per_bio = pages_per_bio; + sdev->curr = -1; for (i = 0; i < SCRUB_BIOS_PER_DEV; ++i) { struct scrub_bio *sbio; @@ -194,8 +239,8 @@ struct scrub_dev *scrub_setup_dev(struct btrfs_device *dev) sbio->index = i; sbio->sdev = sdev; - sbio->count = 0; - sbio->work.func = scrub_checksum; + sbio->page_count = 0; + sbio->work.func = scrub_bio_end_io_worker; if (i != SCRUB_BIOS_PER_DEV-1) sdev->bios[i]->next_free = i + 1; @@ -203,7 +248,9 @@ struct scrub_dev *scrub_setup_dev(struct btrfs_device *dev) sdev->bios[i]->next_free = -1; } sdev->first_free = 0; - sdev->curr = -1; + sdev->nodesize = dev->dev_root->nodesize; + sdev->leafsize = dev->dev_root->leafsize; + sdev->sectorsize = dev->dev_root->sectorsize; atomic_set(&sdev->in_flight, 0); atomic_set(&sdev->fixup_cnt, 0); atomic_set(&sdev->cancel_req, 0); @@ -294,10 +341,9 @@ err: return 0; } -static void scrub_print_warning(const char *errstr, struct scrub_bio *sbio, - int ix) +static void scrub_print_warning(const char *errstr, struct scrub_block *sblock) { - struct btrfs_device *dev = sbio->sdev->dev; + struct btrfs_device *dev = sblock->sdev->dev; struct btrfs_fs_info *fs_info = dev->dev_root->fs_info; struct btrfs_path *path; struct btrfs_key found_key; @@ -316,8 +362,9 @@ static void scrub_print_warning(const char *errstr, struct scrub_bio *sbio, swarn.scratch_buf = kmalloc(bufsize, GFP_NOFS); swarn.msg_buf = kmalloc(bufsize, GFP_NOFS); - swarn.sector = (sbio->physical + ix * PAGE_SIZE) >> 9; - swarn.logical = sbio->logical + ix * PAGE_SIZE; + BUG_ON(sblock->page_count < 1); + swarn.sector = (sblock->pagev[0].physical) >> 9; + swarn.logical = sblock->pagev[0].logical; swarn.errstr = errstr; swarn.dev = dev; swarn.msg_bufsize = bufsize; @@ -342,7 +389,8 @@ static void scrub_print_warning(const char *errstr, struct scrub_bio *sbio, do { ret = tree_backref_for_extent(&ptr, eb, ei, item_size, &ref_root, &ref_level); - printk(KERN_WARNING "%s at logical %llu on dev %s, " + printk(KERN_WARNING + "btrfs: %s at logical %llu on dev %s, " "sector %llu: metadata %s (level %d) in tree " "%llu\n", errstr, swarn.logical, dev->name, (unsigned long long)swarn.sector, @@ -352,8 +400,8 @@ static void scrub_print_warning(const char *errstr, struct scrub_bio *sbio, } while (ret != 1); } else { swarn.path = path; - iterate_extent_inodes(fs_info, path, found_key.objectid, - extent_item_pos, + iterate_extent_inodes(fs_info, found_key.objectid, + extent_item_pos, 1, scrub_print_warning_inode, &swarn); } @@ -531,9 +579,9 @@ out: spin_lock(&sdev->stat_lock); ++sdev->stat.uncorrectable_errors; spin_unlock(&sdev->stat_lock); - printk_ratelimited(KERN_ERR "btrfs: unable to fixup " - "(nodatasum) error at logical %llu\n", - fixup->logical); + printk_ratelimited(KERN_ERR + "btrfs: unable to fixup (nodatasum) error at logical %llu on dev %s\n", + (unsigned long long)fixup->logical, sdev->dev->name); } btrfs_free_path(path); @@ -550,91 +598,168 @@ out: } /* - * scrub_recheck_error gets called when either verification of the page - * failed or the bio failed to read, e.g. with EIO. In the latter case, - * recheck_error gets called for every page in the bio, even though only - * one may be bad + * scrub_handle_errored_block gets called when either verification of the + * pages failed or the bio failed to read, e.g. with EIO. In the latter + * case, this function handles all pages in the bio, even though only one + * may be bad. + * The goal of this function is to repair the errored block by using the + * contents of one of the mirrors. */ -static int scrub_recheck_error(struct scrub_bio *sbio, int ix) +static int scrub_handle_errored_block(struct scrub_block *sblock_to_check) { - struct scrub_dev *sdev = sbio->sdev; - u64 sector = (sbio->physical + ix * PAGE_SIZE) >> 9; + struct scrub_dev *sdev = sblock_to_check->sdev; + struct btrfs_fs_info *fs_info; + u64 length; + u64 logical; + u64 generation; + unsigned int failed_mirror_index; + unsigned int is_metadata; + unsigned int have_csum; + u8 *csum; + struct scrub_block *sblocks_for_recheck; /* holds one for each mirror */ + struct scrub_block *sblock_bad; + int ret; + int mirror_index; + int page_num; + int success; static DEFINE_RATELIMIT_STATE(_rs, DEFAULT_RATELIMIT_INTERVAL, - DEFAULT_RATELIMIT_BURST); + DEFAULT_RATELIMIT_BURST); + + BUG_ON(sblock_to_check->page_count < 1); + fs_info = sdev->dev->dev_root->fs_info; + length = sblock_to_check->page_count * PAGE_SIZE; + logical = sblock_to_check->pagev[0].logical; + generation = sblock_to_check->pagev[0].generation; + BUG_ON(sblock_to_check->pagev[0].mirror_num < 1); + failed_mirror_index = sblock_to_check->pagev[0].mirror_num - 1; + is_metadata = !(sblock_to_check->pagev[0].flags & + BTRFS_EXTENT_FLAG_DATA); + have_csum = sblock_to_check->pagev[0].have_csum; + csum = sblock_to_check->pagev[0].csum; - if (sbio->err) { - if (scrub_fixup_io(READ, sbio->sdev->dev->bdev, sector, - sbio->bio->bi_io_vec[ix].bv_page) == 0) { - if (scrub_fixup_check(sbio, ix) == 0) - return 0; - } - if (__ratelimit(&_rs)) - scrub_print_warning("i/o error", sbio, ix); - } else { - if (__ratelimit(&_rs)) - scrub_print_warning("checksum error", sbio, ix); + /* + * read all mirrors one after the other. This includes to + * re-read the extent or metadata block that failed (that was + * the cause that this fixup code is called) another time, + * page by page this time in order to know which pages + * caused I/O errors and which ones are good (for all mirrors). + * It is the goal to handle the situation when more than one + * mirror contains I/O errors, but the errors do not + * overlap, i.e. the data can be repaired by selecting the + * pages from those mirrors without I/O error on the + * particular pages. One example (with blocks >= 2 * PAGE_SIZE) + * would be that mirror #1 has an I/O error on the first page, + * the second page is good, and mirror #2 has an I/O error on + * the second page, but the first page is good. + * Then the first page of the first mirror can be repaired by + * taking the first page of the second mirror, and the + * second page of the second mirror can be repaired by + * copying the contents of the 2nd page of the 1st mirror. + * One more note: if the pages of one mirror contain I/O + * errors, the checksum cannot be verified. In order to get + * the best data for repairing, the first attempt is to find + * a mirror without I/O errors and with a validated checksum. + * Only if this is not possible, the pages are picked from + * mirrors with I/O errors without considering the checksum. + * If the latter is the case, at the end, the checksum of the + * repaired area is verified in order to correctly maintain + * the statistics. + */ + + sblocks_for_recheck = kzalloc(BTRFS_MAX_MIRRORS * + sizeof(*sblocks_for_recheck), + GFP_NOFS); + if (!sblocks_for_recheck) { + spin_lock(&sdev->stat_lock); + sdev->stat.malloc_errors++; + sdev->stat.read_errors++; + sdev->stat.uncorrectable_errors++; + spin_unlock(&sdev->stat_lock); + goto out; } - spin_lock(&sdev->stat_lock); - ++sdev->stat.read_errors; - spin_unlock(&sdev->stat_lock); + /* setup the context, map the logical blocks and alloc the pages */ + ret = scrub_setup_recheck_block(sdev, &fs_info->mapping_tree, length, + logical, sblocks_for_recheck); + if (ret) { + spin_lock(&sdev->stat_lock); + sdev->stat.read_errors++; + sdev->stat.uncorrectable_errors++; + spin_unlock(&sdev->stat_lock); + goto out; + } + BUG_ON(failed_mirror_index >= BTRFS_MAX_MIRRORS); + sblock_bad = sblocks_for_recheck + failed_mirror_index; - scrub_fixup(sbio, ix); - return 1; -} + /* build and submit the bios for the failed mirror, check checksums */ + ret = scrub_recheck_block(fs_info, sblock_bad, is_metadata, have_csum, + csum, generation, sdev->csum_size); + if (ret) { + spin_lock(&sdev->stat_lock); + sdev->stat.read_errors++; + sdev->stat.uncorrectable_errors++; + spin_unlock(&sdev->stat_lock); + goto out; + } -static int scrub_fixup_check(struct scrub_bio *sbio, int ix) -{ - int ret = 1; - struct page *page; - void *buffer; - u64 flags = sbio->spag[ix].flags; + if (!sblock_bad->header_error && !sblock_bad->checksum_error && + sblock_bad->no_io_error_seen) { + /* + * the error disappeared after reading page by page, or + * the area was part of a huge bio and other parts of the + * bio caused I/O errors, or the block layer merged several + * read requests into one and the error is caused by a + * different bio (usually one of the two latter cases is + * the cause) + */ + spin_lock(&sdev->stat_lock); + sdev->stat.unverified_errors++; + spin_unlock(&sdev->stat_lock); - page = sbio->bio->bi_io_vec[ix].bv_page; - buffer = kmap_atomic(page, KM_USER0); - if (flags & BTRFS_EXTENT_FLAG_DATA) { - ret = scrub_checksum_data(sbio->sdev, - sbio->spag + ix, buffer); - } else if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) { - ret = scrub_checksum_tree_block(sbio->sdev, - sbio->spag + ix, - sbio->logical + ix * PAGE_SIZE, - buffer); - } else { - WARN_ON(1); + goto out; } - kunmap_atomic(buffer, KM_USER0); - return ret; -} + if (!sblock_bad->no_io_error_seen) { + spin_lock(&sdev->stat_lock); + sdev->stat.read_errors++; + spin_unlock(&sdev->stat_lock); + if (__ratelimit(&_rs)) + scrub_print_warning("i/o error", sblock_to_check); + } else if (sblock_bad->checksum_error) { + spin_lock(&sdev->stat_lock); + sdev->stat.csum_errors++; + spin_unlock(&sdev->stat_lock); + if (__ratelimit(&_rs)) + scrub_print_warning("checksum error", sblock_to_check); + } else if (sblock_bad->header_error) { + spin_lock(&sdev->stat_lock); + sdev->stat.verify_errors++; + spin_unlock(&sdev->stat_lock); + if (__ratelimit(&_rs)) + scrub_print_warning("checksum/header error", + sblock_to_check); + } -static void scrub_fixup_end_io(struct bio *bio, int err) -{ - complete((struct completion *)bio->bi_private); -} + if (sdev->readonly) + goto did_not_correct_error; + + if (!is_metadata && !have_csum) { + struct scrub_fixup_nodatasum *fixup_nodatasum; -static void scrub_fixup(struct scrub_bio *sbio, int ix) -{ - struct scrub_dev *sdev = sbio->sdev; - struct btrfs_fs_info *fs_info = sdev->dev->dev_root->fs_info; - struct btrfs_mapping_tree *map_tree = &fs_info->mapping_tree; - struct btrfs_bio *bbio = NULL; - struct scrub_fixup_nodatasum *fixup; - u64 logical = sbio->logical + ix * PAGE_SIZE; - u64 length; - int i; - int ret; - DECLARE_COMPLETION_ONSTACK(complete); - - if ((sbio->spag[ix].flags & BTRFS_EXTENT_FLAG_DATA) && - (sbio->spag[ix].have_csum == 0)) { - fixup = kzalloc(sizeof(*fixup), GFP_NOFS); - if (!fixup) - goto uncorrectable; - fixup->sdev = sdev; - fixup->logical = logical; - fixup->root = fs_info->extent_root; - fixup->mirror_num = sbio->spag[ix].mirror_num; + /* + * !is_metadata and !have_csum, this means that the data + * might not be COW'ed, that it might be modified + * concurrently. The general strategy to work on the + * commit root does not help in the case when COW is not + * used. + */ + fixup_nodatasum = kzalloc(sizeof(*fixup_nodatasum), GFP_NOFS); + if (!fixup_nodatasum) + goto did_not_correct_error; + fixup_nodatasum->sdev = sdev; + fixup_nodatasum->logical = logical; + fixup_nodatasum->root = fs_info->extent_root; + fixup_nodatasum->mirror_num = failed_mirror_index + 1; /* * increment scrubs_running to prevent cancel requests from * completing as long as a fixup worker is running. we must also @@ -649,235 +774,528 @@ static void scrub_fixup(struct scrub_bio *sbio, int ix) atomic_inc(&fs_info->scrubs_paused); mutex_unlock(&fs_info->scrub_lock); atomic_inc(&sdev->fixup_cnt); - fixup->work.func = scrub_fixup_nodatasum; - btrfs_queue_worker(&fs_info->scrub_workers, &fixup->work); - return; + fixup_nodatasum->work.func = scrub_fixup_nodatasum; + btrfs_queue_worker(&fs_info->scrub_workers, + &fixup_nodatasum->work); + goto out; } - length = PAGE_SIZE; - ret = btrfs_map_block(map_tree, REQ_WRITE, logical, &length, - &bbio, 0); - if (ret || !bbio || length < PAGE_SIZE) { - printk(KERN_ERR - "scrub_fixup: btrfs_map_block failed us for %llu\n", - (unsigned long long)logical); - WARN_ON(1); - kfree(bbio); - return; + /* + * now build and submit the bios for the other mirrors, check + * checksums + */ + for (mirror_index = 0; + mirror_index < BTRFS_MAX_MIRRORS && + sblocks_for_recheck[mirror_index].page_count > 0; + mirror_index++) { + if (mirror_index == failed_mirror_index) + continue; + + /* build and submit the bios, check checksums */ + ret = scrub_recheck_block(fs_info, + sblocks_for_recheck + mirror_index, + is_metadata, have_csum, csum, + generation, sdev->csum_size); + if (ret) + goto did_not_correct_error; } - if (bbio->num_stripes == 1) - /* there aren't any replicas */ - goto uncorrectable; + /* + * first try to pick the mirror which is completely without I/O + * errors and also does not have a checksum error. + * If one is found, and if a checksum is present, the full block + * that is known to contain an error is rewritten. Afterwards + * the block is known to be corrected. + * If a mirror is found which is completely correct, and no + * checksum is present, only those pages are rewritten that had + * an I/O error in the block to be repaired, since it cannot be + * determined, which copy of the other pages is better (and it + * could happen otherwise that a correct page would be + * overwritten by a bad one). + */ + for (mirror_index = 0; + mirror_index < BTRFS_MAX_MIRRORS && + sblocks_for_recheck[mirror_index].page_count > 0; + mirror_index++) { + struct scrub_block *sblock_other = sblocks_for_recheck + + mirror_index; + + if (!sblock_other->header_error && + !sblock_other->checksum_error && + sblock_other->no_io_error_seen) { + int force_write = is_metadata || have_csum; + + ret = scrub_repair_block_from_good_copy(sblock_bad, + sblock_other, + force_write); + if (0 == ret) + goto corrected_error; + } + } /* - * first find a good copy + * in case of I/O errors in the area that is supposed to be + * repaired, continue by picking good copies of those pages. + * Select the good pages from mirrors to rewrite bad pages from + * the area to fix. Afterwards verify the checksum of the block + * that is supposed to be repaired. This verification step is + * only done for the purpose of statistic counting and for the + * final scrub report, whether errors remain. + * A perfect algorithm could make use of the checksum and try + * all possible combinations of pages from the different mirrors + * until the checksum verification succeeds. For example, when + * the 2nd page of mirror #1 faces I/O errors, and the 2nd page + * of mirror #2 is readable but the final checksum test fails, + * then the 2nd page of mirror #3 could be tried, whether now + * the final checksum succeedes. But this would be a rare + * exception and is therefore not implemented. At least it is + * avoided that the good copy is overwritten. + * A more useful improvement would be to pick the sectors + * without I/O error based on sector sizes (512 bytes on legacy + * disks) instead of on PAGE_SIZE. Then maybe 512 byte of one + * mirror could be repaired by taking 512 byte of a different + * mirror, even if other 512 byte sectors in the same PAGE_SIZE + * area are unreadable. */ - for (i = 0; i < bbio->num_stripes; ++i) { - if (i + 1 == sbio->spag[ix].mirror_num) - continue; - if (scrub_fixup_io(READ, bbio->stripes[i].dev->bdev, - bbio->stripes[i].physical >> 9, - sbio->bio->bi_io_vec[ix].bv_page)) { - /* I/O-error, this is not a good copy */ + /* can only fix I/O errors from here on */ + if (sblock_bad->no_io_error_seen) + goto did_not_correct_error; + + success = 1; + for (page_num = 0; page_num < sblock_bad->page_count; page_num++) { + struct scrub_page *page_bad = sblock_bad->pagev + page_num; + + if (!page_bad->io_error) continue; + + for (mirror_index = 0; + mirror_index < BTRFS_MAX_MIRRORS && + sblocks_for_recheck[mirror_index].page_count > 0; + mirror_index++) { + struct scrub_block *sblock_other = sblocks_for_recheck + + mirror_index; + struct scrub_page *page_other = sblock_other->pagev + + page_num; + + if (!page_other->io_error) { + ret = scrub_repair_page_from_good_copy( + sblock_bad, sblock_other, page_num, 0); + if (0 == ret) { + page_bad->io_error = 0; + break; /* succeeded for this page */ + } + } } - if (scrub_fixup_check(sbio, ix) == 0) - break; + if (page_bad->io_error) { + /* did not find a mirror to copy the page from */ + success = 0; + } } - if (i == bbio->num_stripes) - goto uncorrectable; - if (!sdev->readonly) { - /* - * bi_io_vec[ix].bv_page now contains good data, write it back - */ - if (scrub_fixup_io(WRITE, sdev->dev->bdev, - (sbio->physical + ix * PAGE_SIZE) >> 9, - sbio->bio->bi_io_vec[ix].bv_page)) { - /* I/O-error, writeback failed, give up */ - goto uncorrectable; + if (success) { + if (is_metadata || have_csum) { + /* + * need to verify the checksum now that all + * sectors on disk are repaired (the write + * request for data to be repaired is on its way). + * Just be lazy and use scrub_recheck_block() + * which re-reads the data before the checksum + * is verified, but most likely the data comes out + * of the page cache. + */ + ret = scrub_recheck_block(fs_info, sblock_bad, + is_metadata, have_csum, csum, + generation, sdev->csum_size); + if (!ret && !sblock_bad->header_error && + !sblock_bad->checksum_error && + sblock_bad->no_io_error_seen) + goto corrected_error; + else + goto did_not_correct_error; + } else { +corrected_error: + spin_lock(&sdev->stat_lock); + sdev->stat.corrected_errors++; + spin_unlock(&sdev->stat_lock); + printk_ratelimited(KERN_ERR + "btrfs: fixed up error at logical %llu on dev %s\n", + (unsigned long long)logical, sdev->dev->name); } + } else { +did_not_correct_error: + spin_lock(&sdev->stat_lock); + sdev->stat.uncorrectable_errors++; + spin_unlock(&sdev->stat_lock); + printk_ratelimited(KERN_ERR + "btrfs: unable to fixup (regular) error at logical %llu on dev %s\n", + (unsigned long long)logical, sdev->dev->name); } - kfree(bbio); - spin_lock(&sdev->stat_lock); - ++sdev->stat.corrected_errors; - spin_unlock(&sdev->stat_lock); +out: + if (sblocks_for_recheck) { + for (mirror_index = 0; mirror_index < BTRFS_MAX_MIRRORS; + mirror_index++) { + struct scrub_block *sblock = sblocks_for_recheck + + mirror_index; + int page_index; + + for (page_index = 0; page_index < SCRUB_PAGES_PER_BIO; + page_index++) + if (sblock->pagev[page_index].page) + __free_page( + sblock->pagev[page_index].page); + } + kfree(sblocks_for_recheck); + } - printk_ratelimited(KERN_ERR "btrfs: fixed up error at logical %llu\n", - (unsigned long long)logical); - return; + return 0; +} -uncorrectable: - kfree(bbio); - spin_lock(&sdev->stat_lock); - ++sdev->stat.uncorrectable_errors; - spin_unlock(&sdev->stat_lock); +static int scrub_setup_recheck_block(struct scrub_dev *sdev, + struct btrfs_mapping_tree *map_tree, + u64 length, u64 logical, + struct scrub_block *sblocks_for_recheck) +{ + int page_index; + int mirror_index; + int ret; + + /* + * note: the three members sdev, ref_count and outstanding_pages + * are not used (and not set) in the blocks that are used for + * the recheck procedure + */ + + page_index = 0; + while (length > 0) { + u64 sublen = min_t(u64, length, PAGE_SIZE); + u64 mapped_length = sublen; + struct btrfs_bio *bbio = NULL; + + /* + * with a length of PAGE_SIZE, each returned stripe + * represents one mirror + */ + ret = btrfs_map_block(map_tree, WRITE, logical, &mapped_length, + &bbio, 0); + if (ret || !bbio || mapped_length < sublen) { + kfree(bbio); + return -EIO; + } - printk_ratelimited(KERN_ERR "btrfs: unable to fixup (regular) error at " - "logical %llu\n", (unsigned long long)logical); + BUG_ON(page_index >= SCRUB_PAGES_PER_BIO); + for (mirror_index = 0; mirror_index < (int)bbio->num_stripes; + mirror_index++) { + struct scrub_block *sblock; + struct scrub_page *page; + + if (mirror_index >= BTRFS_MAX_MIRRORS) + continue; + + sblock = sblocks_for_recheck + mirror_index; + page = sblock->pagev + page_index; + page->logical = logical; + page->physical = bbio->stripes[mirror_index].physical; + page->bdev = bbio->stripes[mirror_index].dev->bdev; + page->mirror_num = mirror_index + 1; + page->page = alloc_page(GFP_NOFS); + if (!page->page) { + spin_lock(&sdev->stat_lock); + sdev->stat.malloc_errors++; + spin_unlock(&sdev->stat_lock); + return -ENOMEM; + } + sblock->page_count++; + } + kfree(bbio); + length -= sublen; + logical += sublen; + page_index++; + } + + return 0; } -static int scrub_fixup_io(int rw, struct block_device *bdev, sector_t sector, - struct page *page) +/* + * this function will check the on disk data for checksum errors, header + * errors and read I/O errors. If any I/O errors happen, the exact pages + * which are errored are marked as being bad. The goal is to enable scrub + * to take those pages that are not errored from all the mirrors so that + * the pages that are errored in the just handled mirror can be repaired. + */ +static int scrub_recheck_block(struct btrfs_fs_info *fs_info, + struct scrub_block *sblock, int is_metadata, + int have_csum, u8 *csum, u64 generation, + u16 csum_size) { - struct bio *bio = NULL; - int ret; - DECLARE_COMPLETION_ONSTACK(complete); + int page_num; - bio = bio_alloc(GFP_NOFS, 1); - bio->bi_bdev = bdev; - bio->bi_sector = sector; - bio_add_page(bio, page, PAGE_SIZE, 0); - bio->bi_end_io = scrub_fixup_end_io; - bio->bi_private = &complete; - btrfsic_submit_bio(rw, bio); + sblock->no_io_error_seen = 1; + sblock->header_error = 0; + sblock->checksum_error = 0; - /* this will also unplug the queue */ - wait_for_completion(&complete); + for (page_num = 0; page_num < sblock->page_count; page_num++) { + struct bio *bio; + int ret; + struct scrub_page *page = sblock->pagev + page_num; + DECLARE_COMPLETION_ONSTACK(complete); + + BUG_ON(!page->page); + bio = bio_alloc(GFP_NOFS, 1); + bio->bi_bdev = page->bdev; + bio->bi_sector = page->physical >> 9; + bio->bi_end_io = scrub_complete_bio_end_io; + bio->bi_private = &complete; + + ret = bio_add_page(bio, page->page, PAGE_SIZE, 0); + if (PAGE_SIZE != ret) { + bio_put(bio); + return -EIO; + } + btrfsic_submit_bio(READ, bio); - ret = !test_bit(BIO_UPTODATE, &bio->bi_flags); - bio_put(bio); - return ret; + /* this will also unplug the queue */ + wait_for_completion(&complete); + + page->io_error = !test_bit(BIO_UPTODATE, &bio->bi_flags); + if (!test_bit(BIO_UPTODATE, &bio->bi_flags)) + sblock->no_io_error_seen = 0; + bio_put(bio); + } + + if (sblock->no_io_error_seen) + scrub_recheck_block_checksum(fs_info, sblock, is_metadata, + have_csum, csum, generation, + csum_size); + + return 0; } -static void scrub_bio_end_io(struct bio *bio, int err) +static void scrub_recheck_block_checksum(struct btrfs_fs_info *fs_info, + struct scrub_block *sblock, + int is_metadata, int have_csum, + const u8 *csum, u64 generation, + u16 csum_size) { - struct scrub_bio *sbio = bio->bi_private; - struct scrub_dev *sdev = sbio->sdev; - struct btrfs_fs_info *fs_info = sdev->dev->dev_root->fs_info; + int page_num; + u8 calculated_csum[BTRFS_CSUM_SIZE]; + u32 crc = ~(u32)0; + struct btrfs_root *root = fs_info->extent_root; + void *mapped_buffer; + + BUG_ON(!sblock->pagev[0].page); + if (is_metadata) { + struct btrfs_header *h; + + mapped_buffer = kmap_atomic(sblock->pagev[0].page); + h = (struct btrfs_header *)mapped_buffer; + + if (sblock->pagev[0].logical != le64_to_cpu(h->bytenr) || + generation != le64_to_cpu(h->generation) || + memcmp(h->fsid, fs_info->fsid, BTRFS_UUID_SIZE) || + memcmp(h->chunk_tree_uuid, fs_info->chunk_tree_uuid, + BTRFS_UUID_SIZE)) + sblock->header_error = 1; + csum = h->csum; + } else { + if (!have_csum) + return; - sbio->err = err; - sbio->bio = bio; + mapped_buffer = kmap_atomic(sblock->pagev[0].page); + } - btrfs_queue_worker(&fs_info->scrub_workers, &sbio->work); + for (page_num = 0;;) { + if (page_num == 0 && is_metadata) + crc = btrfs_csum_data(root, + ((u8 *)mapped_buffer) + BTRFS_CSUM_SIZE, + crc, PAGE_SIZE - BTRFS_CSUM_SIZE); + else + crc = btrfs_csum_data(root, mapped_buffer, crc, + PAGE_SIZE); + + kunmap_atomic(mapped_buffer); + page_num++; + if (page_num >= sblock->page_count) + break; + BUG_ON(!sblock->pagev[page_num].page); + + mapped_buffer = kmap_atomic(sblock->pagev[page_num].page); + } + + btrfs_csum_final(crc, calculated_csum); + if (memcmp(calculated_csum, csum, csum_size)) + sblock->checksum_error = 1; } -static void scrub_checksum(struct btrfs_work *work) +static void scrub_complete_bio_end_io(struct bio *bio, int err) { - struct scrub_bio *sbio = container_of(work, struct scrub_bio, work); - struct scrub_dev *sdev = sbio->sdev; - struct page *page; - void *buffer; - int i; - u64 flags; - u64 logical; - int ret; + complete((struct completion *)bio->bi_private); +} - if (sbio->err) { - ret = 0; - for (i = 0; i < sbio->count; ++i) - ret |= scrub_recheck_error(sbio, i); - if (!ret) { - spin_lock(&sdev->stat_lock); - ++sdev->stat.unverified_errors; - spin_unlock(&sdev->stat_lock); - } +static int scrub_repair_block_from_good_copy(struct scrub_block *sblock_bad, + struct scrub_block *sblock_good, + int force_write) +{ + int page_num; + int ret = 0; - sbio->bio->bi_flags &= ~(BIO_POOL_MASK - 1); - sbio->bio->bi_flags |= 1 << BIO_UPTODATE; - sbio->bio->bi_phys_segments = 0; - sbio->bio->bi_idx = 0; + for (page_num = 0; page_num < sblock_bad->page_count; page_num++) { + int ret_sub; - for (i = 0; i < sbio->count; i++) { - struct bio_vec *bi; - bi = &sbio->bio->bi_io_vec[i]; - bi->bv_offset = 0; - bi->bv_len = PAGE_SIZE; - } - goto out; + ret_sub = scrub_repair_page_from_good_copy(sblock_bad, + sblock_good, + page_num, + force_write); + if (ret_sub) + ret = ret_sub; } - for (i = 0; i < sbio->count; ++i) { - page = sbio->bio->bi_io_vec[i].bv_page; - buffer = kmap_atomic(page, KM_USER0); - flags = sbio->spag[i].flags; - logical = sbio->logical + i * PAGE_SIZE; - ret = 0; - if (flags & BTRFS_EXTENT_FLAG_DATA) { - ret = scrub_checksum_data(sdev, sbio->spag + i, buffer); - } else if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) { - ret = scrub_checksum_tree_block(sdev, sbio->spag + i, - logical, buffer); - } else if (flags & BTRFS_EXTENT_FLAG_SUPER) { - BUG_ON(i); - (void)scrub_checksum_super(sbio, buffer); - } else { - WARN_ON(1); - } - kunmap_atomic(buffer, KM_USER0); - if (ret) { - ret = scrub_recheck_error(sbio, i); - if (!ret) { - spin_lock(&sdev->stat_lock); - ++sdev->stat.unverified_errors; - spin_unlock(&sdev->stat_lock); - } + + return ret; +} + +static int scrub_repair_page_from_good_copy(struct scrub_block *sblock_bad, + struct scrub_block *sblock_good, + int page_num, int force_write) +{ + struct scrub_page *page_bad = sblock_bad->pagev + page_num; + struct scrub_page *page_good = sblock_good->pagev + page_num; + + BUG_ON(sblock_bad->pagev[page_num].page == NULL); + BUG_ON(sblock_good->pagev[page_num].page == NULL); + if (force_write || sblock_bad->header_error || + sblock_bad->checksum_error || page_bad->io_error) { + struct bio *bio; + int ret; + DECLARE_COMPLETION_ONSTACK(complete); + + bio = bio_alloc(GFP_NOFS, 1); + bio->bi_bdev = page_bad->bdev; + bio->bi_sector = page_bad->physical >> 9; + bio->bi_end_io = scrub_complete_bio_end_io; + bio->bi_private = &complete; + + ret = bio_add_page(bio, page_good->page, PAGE_SIZE, 0); + if (PAGE_SIZE != ret) { + bio_put(bio); + return -EIO; } + btrfsic_submit_bio(WRITE, bio); + + /* this will also unplug the queue */ + wait_for_completion(&complete); + bio_put(bio); } -out: - scrub_free_bio(sbio->bio); - sbio->bio = NULL; - spin_lock(&sdev->list_lock); - sbio->next_free = sdev->first_free; - sdev->first_free = sbio->index; - spin_unlock(&sdev->list_lock); - atomic_dec(&sdev->in_flight); - wake_up(&sdev->list_wait); + return 0; } -static int scrub_checksum_data(struct scrub_dev *sdev, - struct scrub_page *spag, void *buffer) +static void scrub_checksum(struct scrub_block *sblock) { + u64 flags; + int ret; + + BUG_ON(sblock->page_count < 1); + flags = sblock->pagev[0].flags; + ret = 0; + if (flags & BTRFS_EXTENT_FLAG_DATA) + ret = scrub_checksum_data(sblock); + else if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) + ret = scrub_checksum_tree_block(sblock); + else if (flags & BTRFS_EXTENT_FLAG_SUPER) + (void)scrub_checksum_super(sblock); + else + WARN_ON(1); + if (ret) + scrub_handle_errored_block(sblock); +} + +static int scrub_checksum_data(struct scrub_block *sblock) +{ + struct scrub_dev *sdev = sblock->sdev; u8 csum[BTRFS_CSUM_SIZE]; + u8 *on_disk_csum; + struct page *page; + void *buffer; u32 crc = ~(u32)0; int fail = 0; struct btrfs_root *root = sdev->dev->dev_root; + u64 len; + int index; - if (!spag->have_csum) + BUG_ON(sblock->page_count < 1); + if (!sblock->pagev[0].have_csum) return 0; - crc = btrfs_csum_data(root, buffer, crc, PAGE_SIZE); + on_disk_csum = sblock->pagev[0].csum; + page = sblock->pagev[0].page; + buffer = kmap_atomic(page); + + len = sdev->sectorsize; + index = 0; + for (;;) { + u64 l = min_t(u64, len, PAGE_SIZE); + + crc = btrfs_csum_data(root, buffer, crc, l); + kunmap_atomic(buffer); + len -= l; + if (len == 0) + break; + index++; + BUG_ON(index >= sblock->page_count); + BUG_ON(!sblock->pagev[index].page); + page = sblock->pagev[index].page; + buffer = kmap_atomic(page); + } + btrfs_csum_final(crc, csum); - if (memcmp(csum, spag->csum, sdev->csum_size)) + if (memcmp(csum, on_disk_csum, sdev->csum_size)) fail = 1; - spin_lock(&sdev->stat_lock); - ++sdev->stat.data_extents_scrubbed; - sdev->stat.data_bytes_scrubbed += PAGE_SIZE; - if (fail) + if (fail) { + spin_lock(&sdev->stat_lock); ++sdev->stat.csum_errors; - spin_unlock(&sdev->stat_lock); + spin_unlock(&sdev->stat_lock); + } return fail; } -static int scrub_checksum_tree_block(struct scrub_dev *sdev, - struct scrub_page *spag, u64 logical, - void *buffer) +static int scrub_checksum_tree_block(struct scrub_block *sblock) { + struct scrub_dev *sdev = sblock->sdev; struct btrfs_header *h; struct btrfs_root *root = sdev->dev->dev_root; struct btrfs_fs_info *fs_info = root->fs_info; - u8 csum[BTRFS_CSUM_SIZE]; + u8 calculated_csum[BTRFS_CSUM_SIZE]; + u8 on_disk_csum[BTRFS_CSUM_SIZE]; + struct page *page; + void *mapped_buffer; + u64 mapped_size; + void *p; u32 crc = ~(u32)0; int fail = 0; int crc_fail = 0; + u64 len; + int index; + + BUG_ON(sblock->page_count < 1); + page = sblock->pagev[0].page; + mapped_buffer = kmap_atomic(page); + h = (struct btrfs_header *)mapped_buffer; + memcpy(on_disk_csum, h->csum, sdev->csum_size); /* * we don't use the getter functions here, as we * a) don't have an extent buffer and * b) the page is already kmapped */ - h = (struct btrfs_header *)buffer; - if (logical != le64_to_cpu(h->bytenr)) + if (sblock->pagev[0].logical != le64_to_cpu(h->bytenr)) ++fail; - if (spag->generation != le64_to_cpu(h->generation)) + if (sblock->pagev[0].generation != le64_to_cpu(h->generation)) ++fail; if (memcmp(h->fsid, fs_info->fsid, BTRFS_UUID_SIZE)) @@ -887,51 +1305,99 @@ static int scrub_checksum_tree_block(struct scrub_dev *sdev, BTRFS_UUID_SIZE)) ++fail; - crc = btrfs_csum_data(root, buffer + BTRFS_CSUM_SIZE, crc, - PAGE_SIZE - BTRFS_CSUM_SIZE); - btrfs_csum_final(crc, csum); - if (memcmp(csum, h->csum, sdev->csum_size)) + BUG_ON(sdev->nodesize != sdev->leafsize); + len = sdev->nodesize - BTRFS_CSUM_SIZE; + mapped_size = PAGE_SIZE - BTRFS_CSUM_SIZE; + p = ((u8 *)mapped_buffer) + BTRFS_CSUM_SIZE; + index = 0; + for (;;) { + u64 l = min_t(u64, len, mapped_size); + + crc = btrfs_csum_data(root, p, crc, l); + kunmap_atomic(mapped_buffer); + len -= l; + if (len == 0) + break; + index++; + BUG_ON(index >= sblock->page_count); + BUG_ON(!sblock->pagev[index].page); + page = sblock->pagev[index].page; + mapped_buffer = kmap_atomic(page); + mapped_size = PAGE_SIZE; + p = mapped_buffer; + } + + btrfs_csum_final(crc, calculated_csum); + if (memcmp(calculated_csum, on_disk_csum, sdev->csum_size)) ++crc_fail; - spin_lock(&sdev->stat_lock); - ++sdev->stat.tree_extents_scrubbed; - sdev->stat.tree_bytes_scrubbed += PAGE_SIZE; - if (crc_fail) - ++sdev->stat.csum_errors; - if (fail) - ++sdev->stat.verify_errors; - spin_unlock(&sdev->stat_lock); + if (crc_fail || fail) { + spin_lock(&sdev->stat_lock); + if (crc_fail) + ++sdev->stat.csum_errors; + if (fail) + ++sdev->stat.verify_errors; + spin_unlock(&sdev->stat_lock); + } return fail || crc_fail; } -static int scrub_checksum_super(struct scrub_bio *sbio, void *buffer) +static int scrub_checksum_super(struct scrub_block *sblock) { struct btrfs_super_block *s; - u64 logical; - struct scrub_dev *sdev = sbio->sdev; + struct scrub_dev *sdev = sblock->sdev; struct btrfs_root *root = sdev->dev->dev_root; struct btrfs_fs_info *fs_info = root->fs_info; - u8 csum[BTRFS_CSUM_SIZE]; + u8 calculated_csum[BTRFS_CSUM_SIZE]; + u8 on_disk_csum[BTRFS_CSUM_SIZE]; + struct page *page; + void *mapped_buffer; + u64 mapped_size; + void *p; u32 crc = ~(u32)0; int fail = 0; + u64 len; + int index; - s = (struct btrfs_super_block *)buffer; - logical = sbio->logical; + BUG_ON(sblock->page_count < 1); + page = sblock->pagev[0].page; + mapped_buffer = kmap_atomic(page); + s = (struct btrfs_super_block *)mapped_buffer; + memcpy(on_disk_csum, s->csum, sdev->csum_size); - if (logical != le64_to_cpu(s->bytenr)) + if (sblock->pagev[0].logical != le64_to_cpu(s->bytenr)) ++fail; - if (sbio->spag[0].generation != le64_to_cpu(s->generation)) + if (sblock->pagev[0].generation != le64_to_cpu(s->generation)) ++fail; if (memcmp(s->fsid, fs_info->fsid, BTRFS_UUID_SIZE)) ++fail; - crc = btrfs_csum_data(root, buffer + BTRFS_CSUM_SIZE, crc, - PAGE_SIZE - BTRFS_CSUM_SIZE); - btrfs_csum_final(crc, csum); - if (memcmp(csum, s->csum, sbio->sdev->csum_size)) + len = BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE; + mapped_size = PAGE_SIZE - BTRFS_CSUM_SIZE; + p = ((u8 *)mapped_buffer) + BTRFS_CSUM_SIZE; + index = 0; + for (;;) { + u64 l = min_t(u64, len, mapped_size); + + crc = btrfs_csum_data(root, p, crc, l); + kunmap_atomic(mapped_buffer); + len -= l; + if (len == 0) + break; + index++; + BUG_ON(index >= sblock->page_count); + BUG_ON(!sblock->pagev[index].page); + page = sblock->pagev[index].page; + mapped_buffer = kmap_atomic(page); + mapped_size = PAGE_SIZE; + p = mapped_buffer; + } + + btrfs_csum_final(crc, calculated_csum); + if (memcmp(calculated_csum, on_disk_csum, sdev->csum_size)) ++fail; if (fail) { @@ -948,29 +1414,42 @@ static int scrub_checksum_super(struct scrub_bio *sbio, void *buffer) return fail; } -static int scrub_submit(struct scrub_dev *sdev) +static void scrub_block_get(struct scrub_block *sblock) +{ + atomic_inc(&sblock->ref_count); +} + +static void scrub_block_put(struct scrub_block *sblock) +{ + if (atomic_dec_and_test(&sblock->ref_count)) { + int i; + + for (i = 0; i < sblock->page_count; i++) + if (sblock->pagev[i].page) + __free_page(sblock->pagev[i].page); + kfree(sblock); + } +} + +static void scrub_submit(struct scrub_dev *sdev) { struct scrub_bio *sbio; if (sdev->curr == -1) - return 0; + return; sbio = sdev->bios[sdev->curr]; - sbio->err = 0; sdev->curr = -1; atomic_inc(&sdev->in_flight); btrfsic_submit_bio(READ, sbio->bio); - - return 0; } -static int scrub_page(struct scrub_dev *sdev, u64 logical, u64 len, - u64 physical, u64 flags, u64 gen, int mirror_num, - u8 *csum, int force) +static int scrub_add_page_to_bio(struct scrub_dev *sdev, + struct scrub_page *spage) { + struct scrub_block *sblock = spage->sblock; struct scrub_bio *sbio; - struct page *page; int ret; again: @@ -983,7 +1462,7 @@ again: if (sdev->curr != -1) { sdev->first_free = sdev->bios[sdev->curr]->next_free; sdev->bios[sdev->curr]->next_free = -1; - sdev->bios[sdev->curr]->count = 0; + sdev->bios[sdev->curr]->page_count = 0; spin_unlock(&sdev->list_lock); } else { spin_unlock(&sdev->list_lock); @@ -991,62 +1470,200 @@ again: } } sbio = sdev->bios[sdev->curr]; - if (sbio->count == 0) { + if (sbio->page_count == 0) { struct bio *bio; - sbio->physical = physical; - sbio->logical = logical; - bio = bio_alloc(GFP_NOFS, SCRUB_PAGES_PER_BIO); - if (!bio) - return -ENOMEM; + sbio->physical = spage->physical; + sbio->logical = spage->logical; + bio = sbio->bio; + if (!bio) { + bio = bio_alloc(GFP_NOFS, sdev->pages_per_bio); + if (!bio) + return -ENOMEM; + sbio->bio = bio; + } bio->bi_private = sbio; bio->bi_end_io = scrub_bio_end_io; bio->bi_bdev = sdev->dev->bdev; - bio->bi_sector = sbio->physical >> 9; + bio->bi_sector = spage->physical >> 9; sbio->err = 0; - sbio->bio = bio; - } else if (sbio->physical + sbio->count * PAGE_SIZE != physical || - sbio->logical + sbio->count * PAGE_SIZE != logical) { - ret = scrub_submit(sdev); - if (ret) - return ret; + } else if (sbio->physical + sbio->page_count * PAGE_SIZE != + spage->physical || + sbio->logical + sbio->page_count * PAGE_SIZE != + spage->logical) { + scrub_submit(sdev); goto again; } - sbio->spag[sbio->count].flags = flags; - sbio->spag[sbio->count].generation = gen; - sbio->spag[sbio->count].have_csum = 0; - sbio->spag[sbio->count].mirror_num = mirror_num; - - page = alloc_page(GFP_NOFS); - if (!page) - return -ENOMEM; - ret = bio_add_page(sbio->bio, page, PAGE_SIZE, 0); - if (!ret) { - __free_page(page); - ret = scrub_submit(sdev); - if (ret) - return ret; + sbio->pagev[sbio->page_count] = spage; + ret = bio_add_page(sbio->bio, spage->page, PAGE_SIZE, 0); + if (ret != PAGE_SIZE) { + if (sbio->page_count < 1) { + bio_put(sbio->bio); + sbio->bio = NULL; + return -EIO; + } + scrub_submit(sdev); goto again; } - if (csum) { - sbio->spag[sbio->count].have_csum = 1; - memcpy(sbio->spag[sbio->count].csum, csum, sdev->csum_size); + scrub_block_get(sblock); /* one for the added page */ + atomic_inc(&sblock->outstanding_pages); + sbio->page_count++; + if (sbio->page_count == sdev->pages_per_bio) + scrub_submit(sdev); + + return 0; +} + +static int scrub_pages(struct scrub_dev *sdev, u64 logical, u64 len, + u64 physical, u64 flags, u64 gen, int mirror_num, + u8 *csum, int force) +{ + struct scrub_block *sblock; + int index; + + sblock = kzalloc(sizeof(*sblock), GFP_NOFS); + if (!sblock) { + spin_lock(&sdev->stat_lock); + sdev->stat.malloc_errors++; + spin_unlock(&sdev->stat_lock); + return -ENOMEM; + } + + /* one ref inside this function, plus one for each page later on */ + atomic_set(&sblock->ref_count, 1); + sblock->sdev = sdev; + sblock->no_io_error_seen = 1; + + for (index = 0; len > 0; index++) { + struct scrub_page *spage = sblock->pagev + index; + u64 l = min_t(u64, len, PAGE_SIZE); + + BUG_ON(index >= SCRUB_MAX_PAGES_PER_BLOCK); + spage->page = alloc_page(GFP_NOFS); + if (!spage->page) { + spin_lock(&sdev->stat_lock); + sdev->stat.malloc_errors++; + spin_unlock(&sdev->stat_lock); + while (index > 0) { + index--; + __free_page(sblock->pagev[index].page); + } + kfree(sblock); + return -ENOMEM; + } + spage->sblock = sblock; + spage->bdev = sdev->dev->bdev; + spage->flags = flags; + spage->generation = gen; + spage->logical = logical; + spage->physical = physical; + spage->mirror_num = mirror_num; + if (csum) { + spage->have_csum = 1; + memcpy(spage->csum, csum, sdev->csum_size); + } else { + spage->have_csum = 0; + } + sblock->page_count++; + len -= l; + logical += l; + physical += l; } - ++sbio->count; - if (sbio->count == SCRUB_PAGES_PER_BIO || force) { + + BUG_ON(sblock->page_count == 0); + for (index = 0; index < sblock->page_count; index++) { + struct scrub_page *spage = sblock->pagev + index; int ret; - ret = scrub_submit(sdev); - if (ret) + ret = scrub_add_page_to_bio(sdev, spage); + if (ret) { + scrub_block_put(sblock); return ret; + } } + if (force) + scrub_submit(sdev); + + /* last one frees, either here or in bio completion for last page */ + scrub_block_put(sblock); return 0; } +static void scrub_bio_end_io(struct bio *bio, int err) +{ + struct scrub_bio *sbio = bio->bi_private; + struct scrub_dev *sdev = sbio->sdev; + struct btrfs_fs_info *fs_info = sdev->dev->dev_root->fs_info; + + sbio->err = err; + sbio->bio = bio; + + btrfs_queue_worker(&fs_info->scrub_workers, &sbio->work); +} + +static void scrub_bio_end_io_worker(struct btrfs_work *work) +{ + struct scrub_bio *sbio = container_of(work, struct scrub_bio, work); + struct scrub_dev *sdev = sbio->sdev; + int i; + + BUG_ON(sbio->page_count > SCRUB_PAGES_PER_BIO); + if (sbio->err) { + for (i = 0; i < sbio->page_count; i++) { + struct scrub_page *spage = sbio->pagev[i]; + + spage->io_error = 1; + spage->sblock->no_io_error_seen = 0; + } + } + + /* now complete the scrub_block items that have all pages completed */ + for (i = 0; i < sbio->page_count; i++) { + struct scrub_page *spage = sbio->pagev[i]; + struct scrub_block *sblock = spage->sblock; + + if (atomic_dec_and_test(&sblock->outstanding_pages)) + scrub_block_complete(sblock); + scrub_block_put(sblock); + } + + if (sbio->err) { + /* what is this good for??? */ + sbio->bio->bi_flags &= ~(BIO_POOL_MASK - 1); + sbio->bio->bi_flags |= 1 << BIO_UPTODATE; + sbio->bio->bi_phys_segments = 0; + sbio->bio->bi_idx = 0; + + for (i = 0; i < sbio->page_count; i++) { + struct bio_vec *bi; + bi = &sbio->bio->bi_io_vec[i]; + bi->bv_offset = 0; + bi->bv_len = PAGE_SIZE; + } + } + + bio_put(sbio->bio); + sbio->bio = NULL; + spin_lock(&sdev->list_lock); + sbio->next_free = sdev->first_free; + sdev->first_free = sbio->index; + spin_unlock(&sdev->list_lock); + atomic_dec(&sdev->in_flight); + wake_up(&sdev->list_wait); +} + +static void scrub_block_complete(struct scrub_block *sblock) +{ + if (!sblock->no_io_error_seen) + scrub_handle_errored_block(sblock); + else + scrub_checksum(sblock); +} + static int scrub_find_csum(struct scrub_dev *sdev, u64 logical, u64 len, u8 *csum) { @@ -1054,7 +1671,6 @@ static int scrub_find_csum(struct scrub_dev *sdev, u64 logical, u64 len, int ret = 0; unsigned long i; unsigned long num_sectors; - u32 sectorsize = sdev->dev->dev_root->sectorsize; while (!list_empty(&sdev->csum_list)) { sum = list_first_entry(&sdev->csum_list, @@ -1072,7 +1688,7 @@ static int scrub_find_csum(struct scrub_dev *sdev, u64 logical, u64 len, if (!sum) return 0; - num_sectors = sum->len / sectorsize; + num_sectors = sum->len / sdev->sectorsize; for (i = 0; i < num_sectors; ++i) { if (sum->sums[i].bytenr == logical) { memcpy(csum, &sum->sums[i].sum, sdev->csum_size); @@ -1093,9 +1709,28 @@ static int scrub_extent(struct scrub_dev *sdev, u64 logical, u64 len, { int ret; u8 csum[BTRFS_CSUM_SIZE]; + u32 blocksize; + + if (flags & BTRFS_EXTENT_FLAG_DATA) { + blocksize = sdev->sectorsize; + spin_lock(&sdev->stat_lock); + sdev->stat.data_extents_scrubbed++; + sdev->stat.data_bytes_scrubbed += len; + spin_unlock(&sdev->stat_lock); + } else if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) { + BUG_ON(sdev->nodesize != sdev->leafsize); + blocksize = sdev->nodesize; + spin_lock(&sdev->stat_lock); + sdev->stat.tree_extents_scrubbed++; + sdev->stat.tree_bytes_scrubbed += len; + spin_unlock(&sdev->stat_lock); + } else { + blocksize = sdev->sectorsize; + BUG_ON(1); + } while (len) { - u64 l = min_t(u64, len, PAGE_SIZE); + u64 l = min_t(u64, len, blocksize); int have_csum = 0; if (flags & BTRFS_EXTENT_FLAG_DATA) { @@ -1104,8 +1739,8 @@ static int scrub_extent(struct scrub_dev *sdev, u64 logical, u64 len, if (have_csum == 0) ++sdev->stat.no_csum; } - ret = scrub_page(sdev, logical, l, physical, flags, gen, - mirror_num, have_csum ? csum : NULL, 0); + ret = scrub_pages(sdev, logical, l, physical, flags, gen, + mirror_num, have_csum ? csum : NULL, 0); if (ret) return ret; len -= l; @@ -1170,6 +1805,11 @@ static noinline_for_stack int scrub_stripe(struct scrub_dev *sdev, if (!path) return -ENOMEM; + /* + * work on commit root. The related disk blocks are static as + * long as COW is applied. This means, it is save to rewrite + * them to repair disk errors without any race conditions + */ path->search_commit_root = 1; path->skip_locking = 1; @@ -1367,7 +2007,8 @@ out: } static noinline_for_stack int scrub_chunk(struct scrub_dev *sdev, - u64 chunk_tree, u64 chunk_objectid, u64 chunk_offset, u64 length) + u64 chunk_tree, u64 chunk_objectid, u64 chunk_offset, u64 length, + u64 dev_offset) { struct btrfs_mapping_tree *map_tree = &sdev->dev->dev_root->fs_info->mapping_tree; @@ -1391,7 +2032,8 @@ static noinline_for_stack int scrub_chunk(struct scrub_dev *sdev, goto out; for (i = 0; i < map->num_stripes; ++i) { - if (map->stripes[i].dev == sdev->dev) { + if (map->stripes[i].dev == sdev->dev && + map->stripes[i].physical == dev_offset) { ret = scrub_stripe(sdev, map, i, chunk_offset, length); if (ret) goto out; @@ -1487,7 +2129,7 @@ int scrub_enumerate_chunks(struct scrub_dev *sdev, u64 start, u64 end) break; } ret = scrub_chunk(sdev, chunk_tree, chunk_objectid, - chunk_offset, length); + chunk_offset, length, found_key.offset); btrfs_put_block_group(cache); if (ret) break; @@ -1514,15 +2156,18 @@ static noinline_for_stack int scrub_supers(struct scrub_dev *sdev) struct btrfs_device *device = sdev->dev; struct btrfs_root *root = device->dev_root; + if (root->fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) + return -EIO; + gen = root->fs_info->last_trans_committed; for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) { bytenr = btrfs_sb_offset(i); - if (bytenr + BTRFS_SUPER_INFO_SIZE >= device->total_bytes) + if (bytenr + BTRFS_SUPER_INFO_SIZE > device->total_bytes) break; - ret = scrub_page(sdev, bytenr, PAGE_SIZE, bytenr, - BTRFS_EXTENT_FLAG_SUPER, gen, i, NULL, 1); + ret = scrub_pages(sdev, bytenr, BTRFS_SUPER_INFO_SIZE, bytenr, + BTRFS_EXTENT_FLAG_SUPER, gen, i, NULL, 1); if (ret) return ret; } @@ -1581,10 +2226,30 @@ int btrfs_scrub_dev(struct btrfs_root *root, u64 devid, u64 start, u64 end, /* * check some assumptions */ - if (root->sectorsize != PAGE_SIZE || - root->sectorsize != root->leafsize || - root->sectorsize != root->nodesize) { - printk(KERN_ERR "btrfs_scrub: size assumptions fail\n"); + if (root->nodesize != root->leafsize) { + printk(KERN_ERR + "btrfs_scrub: size assumption nodesize == leafsize (%d == %d) fails\n", + root->nodesize, root->leafsize); + return -EINVAL; + } + + if (root->nodesize > BTRFS_STRIPE_LEN) { + /* + * in this case scrub is unable to calculate the checksum + * the way scrub is implemented. Do not handle this + * situation at all because it won't ever happen. + */ + printk(KERN_ERR + "btrfs_scrub: size assumption nodesize <= BTRFS_STRIPE_LEN (%d <= %d) fails\n", + root->nodesize, BTRFS_STRIPE_LEN); + return -EINVAL; + } + + if (root->sectorsize != PAGE_SIZE) { + /* not supported for data w/o checksums */ + printk(KERN_ERR + "btrfs_scrub: size assumption sectorsize != PAGE_SIZE (%d != %lld) fails\n", + root->sectorsize, (unsigned long long)PAGE_SIZE); return -EINVAL; } @@ -1654,7 +2319,7 @@ int btrfs_scrub_dev(struct btrfs_root *root, u64 devid, u64 start, u64 end, return ret; } -int btrfs_scrub_pause(struct btrfs_root *root) +void btrfs_scrub_pause(struct btrfs_root *root) { struct btrfs_fs_info *fs_info = root->fs_info; @@ -1669,34 +2334,28 @@ int btrfs_scrub_pause(struct btrfs_root *root) mutex_lock(&fs_info->scrub_lock); } mutex_unlock(&fs_info->scrub_lock); - - return 0; } -int btrfs_scrub_continue(struct btrfs_root *root) +void btrfs_scrub_continue(struct btrfs_root *root) { struct btrfs_fs_info *fs_info = root->fs_info; atomic_dec(&fs_info->scrub_pause_req); wake_up(&fs_info->scrub_pause_wait); - return 0; } -int btrfs_scrub_pause_super(struct btrfs_root *root) +void btrfs_scrub_pause_super(struct btrfs_root *root) { down_write(&root->fs_info->scrub_super_lock); - return 0; } -int btrfs_scrub_continue_super(struct btrfs_root *root) +void btrfs_scrub_continue_super(struct btrfs_root *root) { up_write(&root->fs_info->scrub_super_lock); - return 0; } -int btrfs_scrub_cancel(struct btrfs_root *root) +int __btrfs_scrub_cancel(struct btrfs_fs_info *fs_info) { - struct btrfs_fs_info *fs_info = root->fs_info; mutex_lock(&fs_info->scrub_lock); if (!atomic_read(&fs_info->scrubs_running)) { @@ -1717,6 +2376,11 @@ int btrfs_scrub_cancel(struct btrfs_root *root) return 0; } +int btrfs_scrub_cancel(struct btrfs_root *root) +{ + return __btrfs_scrub_cancel(root->fs_info); +} + int btrfs_scrub_cancel_dev(struct btrfs_root *root, struct btrfs_device *dev) { struct btrfs_fs_info *fs_info = root->fs_info; @@ -1739,6 +2403,7 @@ int btrfs_scrub_cancel_dev(struct btrfs_root *root, struct btrfs_device *dev) return 0; } + int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid) { struct btrfs_fs_info *fs_info = root->fs_info; diff --git a/fs/btrfs/struct-funcs.c b/fs/btrfs/struct-funcs.c index bc1f6ad..c6ffa58 100644 --- a/fs/btrfs/struct-funcs.c +++ b/fs/btrfs/struct-funcs.c @@ -44,8 +44,9 @@ #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ u##bits btrfs_##name(struct extent_buffer *eb, type *s); \ void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val); \ -u##bits btrfs_##name(struct extent_buffer *eb, \ - type *s) \ +void btrfs_set_token_##name(struct extent_buffer *eb, type *s, u##bits val, struct btrfs_map_token *token); \ +u##bits btrfs_token_##name(struct extent_buffer *eb, \ + type *s, struct btrfs_map_token *token) \ { \ unsigned long part_offset = (unsigned long)s; \ unsigned long offset = part_offset + offsetof(type, member); \ @@ -54,9 +55,18 @@ u##bits btrfs_##name(struct extent_buffer *eb, \ char *kaddr; \ unsigned long map_start; \ unsigned long map_len; \ + unsigned long mem_len = sizeof(((type *)0)->member); \ u##bits res; \ + if (token && token->kaddr && token->offset <= offset && \ + token->eb == eb && \ + (token->offset + PAGE_CACHE_SIZE >= offset + mem_len)) { \ + kaddr = token->kaddr; \ + p = (type *)(kaddr + part_offset - token->offset); \ + res = le##bits##_to_cpu(p->member); \ + return res; \ + } \ err = map_private_extent_buffer(eb, offset, \ - sizeof(((type *)0)->member), \ + mem_len, \ &kaddr, &map_start, &map_len); \ if (err) { \ __le##bits leres; \ @@ -65,10 +75,15 @@ u##bits btrfs_##name(struct extent_buffer *eb, \ } \ p = (type *)(kaddr + part_offset - map_start); \ res = le##bits##_to_cpu(p->member); \ + if (token) { \ + token->kaddr = kaddr; \ + token->offset = map_start; \ + token->eb = eb; \ + } \ return res; \ } \ -void btrfs_set_##name(struct extent_buffer *eb, \ - type *s, u##bits val) \ +void btrfs_set_token_##name(struct extent_buffer *eb, \ + type *s, u##bits val, struct btrfs_map_token *token) \ { \ unsigned long part_offset = (unsigned long)s; \ unsigned long offset = part_offset + offsetof(type, member); \ @@ -77,8 +92,17 @@ void btrfs_set_##name(struct extent_buffer *eb, \ char *kaddr; \ unsigned long map_start; \ unsigned long map_len; \ + unsigned long mem_len = sizeof(((type *)0)->member); \ + if (token && token->kaddr && token->offset <= offset && \ + token->eb == eb && \ + (token->offset + PAGE_CACHE_SIZE >= offset + mem_len)) { \ + kaddr = token->kaddr; \ + p = (type *)(kaddr + part_offset - token->offset); \ + p->member = cpu_to_le##bits(val); \ + return; \ + } \ err = map_private_extent_buffer(eb, offset, \ - sizeof(((type *)0)->member), \ + mem_len, \ &kaddr, &map_start, &map_len); \ if (err) { \ __le##bits val2; \ @@ -88,7 +112,22 @@ void btrfs_set_##name(struct extent_buffer *eb, \ } \ p = (type *)(kaddr + part_offset - map_start); \ p->member = cpu_to_le##bits(val); \ -} + if (token) { \ + token->kaddr = kaddr; \ + token->offset = map_start; \ + token->eb = eb; \ + } \ +} \ +void btrfs_set_##name(struct extent_buffer *eb, \ + type *s, u##bits val) \ +{ \ + btrfs_set_token_##name(eb, s, val, NULL); \ +} \ +u##bits btrfs_##name(struct extent_buffer *eb, \ + type *s) \ +{ \ + return btrfs_token_##name(eb, s, NULL); \ +} \ #include "ctree.h" diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 3ce97b2..8d5d380 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -76,6 +76,9 @@ static const char *btrfs_decode_error(struct btrfs_fs_info *fs_info, int errno, case -EROFS: errstr = "Readonly filesystem"; break; + case -EEXIST: + errstr = "Object already exists"; + break; default: if (nbuf) { if (snprintf(nbuf, 16, "error %d", -errno) >= 0) @@ -116,6 +119,8 @@ static void btrfs_handle_error(struct btrfs_fs_info *fs_info) if (fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) { sb->s_flags |= MS_RDONLY; printk(KERN_INFO "btrfs is forced readonly\n"); + __btrfs_scrub_cancel(fs_info); +// WARN_ON(1); } } @@ -124,25 +129,132 @@ static void btrfs_handle_error(struct btrfs_fs_info *fs_info) * invokes the approciate error response. */ void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function, - unsigned int line, int errno) + unsigned int line, int errno, const char *fmt, ...) { struct super_block *sb = fs_info->sb; char nbuf[16]; const char *errstr; + va_list args; + va_start(args, fmt); /* * Special case: if the error is EROFS, and we're already * under MS_RDONLY, then it is safe here. */ if (errno == -EROFS && (sb->s_flags & MS_RDONLY)) + return; + + errstr = btrfs_decode_error(fs_info, errno, nbuf); + if (fmt) { + struct va_format vaf = { + .fmt = fmt, + .va = &args, + }; + + printk(KERN_CRIT "BTRFS error (device %s) in %s:%d: %s (%pV)\n", + sb->s_id, function, line, errstr, &vaf); + } else { + printk(KERN_CRIT "BTRFS error (device %s) in %s:%d: %s\n", + sb->s_id, function, line, errstr); + } + + /* Don't go through full error handling during mount */ + if (sb->s_flags & MS_BORN) { + save_error_info(fs_info); + btrfs_handle_error(fs_info); + } + va_end(args); +} + +const char *logtypes[] = { + "emergency", + "alert", + "critical", + "error", + "warning", + "notice", + "info", + "debug", +}; + +void btrfs_printk(struct btrfs_fs_info *fs_info, const char *fmt, ...) +{ + struct super_block *sb = fs_info->sb; + char lvl[4]; + struct va_format vaf; + va_list args; + const char *type = logtypes[4]; + + va_start(args, fmt); + + if (fmt[0] == '<' && isdigit(fmt[1]) && fmt[2] == '>') { + strncpy(lvl, fmt, 3); + fmt += 3; + type = logtypes[fmt[1] - '0']; + } else + *lvl = '\0'; + + vaf.fmt = fmt; + vaf.va = &args; + printk("%sBTRFS %s (device %s): %pV", lvl, type, sb->s_id, &vaf); +} + +/* + * We only mark the transaction aborted and then set the file system read-only. + * This will prevent new transactions from starting or trying to join this + * one. + * + * This means that error recovery at the call site is limited to freeing + * any local memory allocations and passing the error code up without + * further cleanup. The transaction should complete as it normally would + * in the call path but will return -EIO. + * + * We'll complete the cleanup in btrfs_end_transaction and + * btrfs_commit_transaction. + */ +void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, + struct btrfs_root *root, const char *function, + unsigned int line, int errno) +{ + WARN_ONCE(1, KERN_DEBUG "btrfs: Transaction aborted"); + trans->aborted = errno; + /* Nothing used. The other threads that have joined this + * transaction may be able to continue. */ + if (!trans->blocks_used) { + btrfs_printk(root->fs_info, "Aborting unused transaction.\n"); return; + } + trans->transaction->aborted = errno; + __btrfs_std_error(root->fs_info, function, line, errno, NULL); +} +/* + * __btrfs_panic decodes unexpected, fatal errors from the caller, + * issues an alert, and either panics or BUGs, depending on mount options. + */ +void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, + unsigned int line, int errno, const char *fmt, ...) +{ + char nbuf[16]; + char *s_id = "<unknown>"; + const char *errstr; + struct va_format vaf = { .fmt = fmt }; + va_list args; - errstr = btrfs_decode_error(fs_info, errno, nbuf); - printk(KERN_CRIT "BTRFS error (device %s) in %s:%d: %s\n", - sb->s_id, function, line, errstr); - save_error_info(fs_info); + if (fs_info) + s_id = fs_info->sb->s_id; + + va_start(args, fmt); + vaf.va = &args; - btrfs_handle_error(fs_info); + errstr = btrfs_decode_error(fs_info, errno, nbuf); + if (fs_info->mount_opt & BTRFS_MOUNT_PANIC_ON_FATAL_ERROR) + panic(KERN_CRIT "BTRFS panic (device %s) in %s:%d: %pV (%s)\n", + s_id, function, line, &vaf, errstr); + + printk(KERN_CRIT "BTRFS panic (device %s) in %s:%d: %pV (%s)\n", + s_id, function, line, &vaf, errstr); + va_end(args); + /* Caller calls BUG() */ } static void btrfs_put_super(struct super_block *sb) @@ -166,7 +278,7 @@ enum { Opt_enospc_debug, Opt_subvolrootid, Opt_defrag, Opt_inode_cache, Opt_no_space_cache, Opt_recovery, Opt_skip_balance, Opt_check_integrity, Opt_check_integrity_including_extent_data, - Opt_check_integrity_print_mask, + Opt_check_integrity_print_mask, Opt_fatal_errors, Opt_err, }; @@ -206,12 +318,14 @@ static match_table_t tokens = { {Opt_check_integrity, "check_int"}, {Opt_check_integrity_including_extent_data, "check_int_data"}, {Opt_check_integrity_print_mask, "check_int_print_mask=%d"}, + {Opt_fatal_errors, "fatal_errors=%s"}, {Opt_err, NULL}, }; /* * Regular mount options parser. Everything that is needed only when * reading in a new superblock is parsed here. + * XXX JDM: This needs to be cleaned up for remount. */ int btrfs_parse_options(struct btrfs_root *root, char *options) { @@ -438,6 +552,18 @@ int btrfs_parse_options(struct btrfs_root *root, char *options) ret = -EINVAL; goto out; #endif + case Opt_fatal_errors: + if (strcmp(args[0].from, "panic") == 0) + btrfs_set_opt(info->mount_opt, + PANIC_ON_FATAL_ERROR); + else if (strcmp(args[0].from, "bug") == 0) + btrfs_clear_opt(info->mount_opt, + PANIC_ON_FATAL_ERROR); + else { + ret = -EINVAL; + goto out; + } + break; case Opt_err: printk(KERN_INFO "btrfs: unrecognized mount option " "'%s'\n", p); @@ -629,7 +755,6 @@ static int btrfs_fill_super(struct super_block *sb, void *data, int silent) { struct inode *inode; - struct dentry *root_dentry; struct btrfs_fs_info *fs_info = btrfs_sb(sb); struct btrfs_key key; int err; @@ -660,15 +785,12 @@ static int btrfs_fill_super(struct super_block *sb, goto fail_close; } - root_dentry = d_alloc_root(inode); - if (!root_dentry) { - iput(inode); + sb->s_root = d_make_root(inode); + if (!sb->s_root) { err = -ENOMEM; goto fail_close; } - sb->s_root = root_dentry; - save_mount_options(sb, data); cleancache_init_fs(sb); sb->s_flags |= MS_ACTIVE; @@ -766,6 +888,8 @@ static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry) seq_puts(seq, ",inode_cache"); if (btrfs_test_opt(root, SKIP_BALANCE)) seq_puts(seq, ",skip_balance"); + if (btrfs_test_opt(root, PANIC_ON_FATAL_ERROR)) + seq_puts(seq, ",fatal_errors=panic"); return 0; } @@ -999,11 +1123,20 @@ static int btrfs_remount(struct super_block *sb, int *flags, char *data) { struct btrfs_fs_info *fs_info = btrfs_sb(sb); struct btrfs_root *root = fs_info->tree_root; + unsigned old_flags = sb->s_flags; + unsigned long old_opts = fs_info->mount_opt; + unsigned long old_compress_type = fs_info->compress_type; + u64 old_max_inline = fs_info->max_inline; + u64 old_alloc_start = fs_info->alloc_start; + int old_thread_pool_size = fs_info->thread_pool_size; + unsigned int old_metadata_ratio = fs_info->metadata_ratio; int ret; ret = btrfs_parse_options(root, data); - if (ret) - return -EINVAL; + if (ret) { + ret = -EINVAL; + goto restore; + } if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) return 0; @@ -1011,26 +1144,44 @@ static int btrfs_remount(struct super_block *sb, int *flags, char *data) if (*flags & MS_RDONLY) { sb->s_flags |= MS_RDONLY; - ret = btrfs_commit_super(root); - WARN_ON(ret); + ret = btrfs_commit_super(root); + if (ret) + goto restore; } else { if (fs_info->fs_devices->rw_devices == 0) - return -EACCES; + ret = -EACCES; + goto restore; if (btrfs_super_log_root(fs_info->super_copy) != 0) - return -EINVAL; + ret = -EINVAL; + goto restore; ret = btrfs_cleanup_fs_roots(fs_info); - WARN_ON(ret); + if (ret) + goto restore; /* recover relocation */ ret = btrfs_recover_relocation(root); - WARN_ON(ret); + if (ret) + goto restore; sb->s_flags &= ~MS_RDONLY; } return 0; + +restore: + /* We've hit an error - don't reset MS_RDONLY */ + if (sb->s_flags & MS_RDONLY) + old_flags |= MS_RDONLY; + sb->s_flags = old_flags; + fs_info->mount_opt = old_opts; + fs_info->compress_type = old_compress_type; + fs_info->max_inline = old_max_inline; + fs_info->alloc_start = old_alloc_start; + fs_info->thread_pool_size = old_thread_pool_size; + fs_info->metadata_ratio = old_metadata_ratio; + return ret; } /* Used to sort the devices by max_avail(descending sort) */ @@ -1360,9 +1511,7 @@ static int __init init_btrfs_fs(void) if (err) return err; - err = btrfs_init_compress(); - if (err) - goto free_sysfs; + btrfs_init_compress(); err = btrfs_init_cachep(); if (err) @@ -1388,6 +1537,8 @@ static int __init init_btrfs_fs(void) if (err) goto unregister_ioctl; + btrfs_init_lockdep(); + printk(KERN_INFO "%s loaded\n", BTRFS_BUILD_VERSION); return 0; @@ -1403,7 +1554,6 @@ free_cachep: btrfs_destroy_cachep(); free_compress: btrfs_exit_compress(); -free_sysfs: btrfs_exit_sysfs(); return err; } diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index 287a672..8da29e8 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -31,7 +31,7 @@ #define BTRFS_ROOT_TRANS_TAG 0 -static noinline void put_transaction(struct btrfs_transaction *transaction) +void put_transaction(struct btrfs_transaction *transaction) { WARN_ON(atomic_read(&transaction->use_count) == 0); if (atomic_dec_and_test(&transaction->use_count)) { @@ -58,6 +58,12 @@ static noinline int join_transaction(struct btrfs_root *root, int nofail) spin_lock(&root->fs_info->trans_lock); loop: + /* The file system has been taken offline. No new transactions. */ + if (root->fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) { + spin_unlock(&root->fs_info->trans_lock); + return -EROFS; + } + if (root->fs_info->trans_no_join) { if (!nofail) { spin_unlock(&root->fs_info->trans_lock); @@ -67,6 +73,8 @@ loop: cur_trans = root->fs_info->running_transaction; if (cur_trans) { + if (cur_trans->aborted) + return cur_trans->aborted; atomic_inc(&cur_trans->use_count); atomic_inc(&cur_trans->num_writers); cur_trans->num_joined++; @@ -123,6 +131,7 @@ loop: root->fs_info->generation++; cur_trans->transid = root->fs_info->generation; root->fs_info->running_transaction = cur_trans; + cur_trans->aborted = 0; spin_unlock(&root->fs_info->trans_lock); return 0; @@ -318,6 +327,7 @@ again: h->use_count = 1; h->block_rsv = NULL; h->orig_rsv = NULL; + h->aborted = 0; smp_mb(); if (cur_trans->blocked && may_wait_transaction(root, type)) { @@ -327,7 +337,7 @@ again: if (num_bytes) { trace_btrfs_space_reservation(root->fs_info, "transaction", - (u64)h, num_bytes, 1); + h->transid, num_bytes, 1); h->block_rsv = &root->fs_info->trans_block_rsv; h->bytes_reserved = num_bytes; } @@ -439,6 +449,7 @@ int btrfs_should_end_transaction(struct btrfs_trans_handle *trans, struct btrfs_transaction *cur_trans = trans->transaction; struct btrfs_block_rsv *rsv = trans->block_rsv; int updates; + int err; smp_mb(); if (cur_trans->blocked || cur_trans->delayed_refs.flushing) @@ -452,8 +463,11 @@ int btrfs_should_end_transaction(struct btrfs_trans_handle *trans, updates = trans->delayed_ref_updates; trans->delayed_ref_updates = 0; - if (updates) - btrfs_run_delayed_refs(trans, root, updates); + if (updates) { + err = btrfs_run_delayed_refs(trans, root, updates); + if (err) /* Error code will also eval true */ + return err; + } trans->block_rsv = rsv; @@ -524,6 +538,11 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans, if (throttle) btrfs_run_delayed_iputs(root); + if (trans->aborted || + root->fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) { + return -EIO; + } + return 0; } @@ -689,11 +708,13 @@ static int update_cowonly_root(struct btrfs_trans_handle *trans, ret = btrfs_update_root(trans, tree_root, &root->root_key, &root->root_item); - BUG_ON(ret); + if (ret) + return ret; old_root_used = btrfs_root_used(&root->root_item); ret = btrfs_write_dirty_block_groups(trans, root); - BUG_ON(ret); + if (ret) + return ret; } if (root != root->fs_info->extent_root) @@ -704,6 +725,10 @@ static int update_cowonly_root(struct btrfs_trans_handle *trans, /* * update all the cowonly tree roots on disk + * + * The error handling in this function may not be obvious. Any of the + * failures will cause the file system to go offline. We still need + * to clean up the delayed refs. */ static noinline int commit_cowonly_roots(struct btrfs_trans_handle *trans, struct btrfs_root *root) @@ -714,22 +739,30 @@ static noinline int commit_cowonly_roots(struct btrfs_trans_handle *trans, int ret; ret = btrfs_run_delayed_refs(trans, root, (unsigned long)-1); - BUG_ON(ret); + if (ret) + return ret; eb = btrfs_lock_root_node(fs_info->tree_root); - btrfs_cow_block(trans, fs_info->tree_root, eb, NULL, 0, &eb); + ret = btrfs_cow_block(trans, fs_info->tree_root, eb, NULL, + 0, &eb); btrfs_tree_unlock(eb); free_extent_buffer(eb); + if (ret) + return ret; + ret = btrfs_run_delayed_refs(trans, root, (unsigned long)-1); - BUG_ON(ret); + if (ret) + return ret; while (!list_empty(&fs_info->dirty_cowonly_roots)) { next = fs_info->dirty_cowonly_roots.next; list_del_init(next); root = list_entry(next, struct btrfs_root, dirty_list); - update_cowonly_root(trans, root); + ret = update_cowonly_root(trans, root); + if (ret) + return ret; } down_write(&fs_info->extent_commit_sem); @@ -873,7 +906,7 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, new_root_item = kmalloc(sizeof(*new_root_item), GFP_NOFS); if (!new_root_item) { - pending->error = -ENOMEM; + ret = pending->error = -ENOMEM; goto fail; } @@ -910,17 +943,24 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, * insert the directory item */ ret = btrfs_set_inode_index(parent_inode, &index); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ ret = btrfs_insert_dir_item(trans, parent_root, dentry->d_name.name, dentry->d_name.len, parent_inode, &key, BTRFS_FT_DIR, index); - BUG_ON(ret); + if (ret == -EEXIST) { + pending->error = -EEXIST; + dput(parent); + goto fail; + } else if (ret) { + goto abort_trans_dput; + } btrfs_i_size_write(parent_inode, parent_inode->i_size + dentry->d_name.len * 2); ret = btrfs_update_inode(trans, parent_root, parent_inode); - BUG_ON(ret); + if (ret) + goto abort_trans_dput; /* * pull in the delayed directory update @@ -929,7 +969,10 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, * snapshot */ ret = btrfs_run_delayed_items(trans, root); - BUG_ON(ret); + if (ret) { /* Transaction aborted */ + dput(parent); + goto fail; + } record_root_in_trans(trans, root); btrfs_set_root_last_snapshot(&root->root_item, trans->transid); @@ -944,12 +987,21 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, btrfs_set_root_flags(new_root_item, root_flags); old = btrfs_lock_root_node(root); - btrfs_cow_block(trans, root, old, NULL, 0, &old); + ret = btrfs_cow_block(trans, root, old, NULL, 0, &old); + if (ret) { + btrfs_tree_unlock(old); + free_extent_buffer(old); + goto abort_trans_dput; + } + btrfs_set_lock_blocking(old); - btrfs_copy_root(trans, root, old, &tmp, objectid); + ret = btrfs_copy_root(trans, root, old, &tmp, objectid); + /* clean up in any case */ btrfs_tree_unlock(old); free_extent_buffer(old); + if (ret) + goto abort_trans_dput; /* see comments in should_cow_block() */ root->force_cow = 1; @@ -961,7 +1013,8 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, ret = btrfs_insert_root(trans, tree_root, &key, new_root_item); btrfs_tree_unlock(tmp); free_extent_buffer(tmp); - BUG_ON(ret); + if (ret) + goto abort_trans_dput; /* * insert root back/forward references @@ -970,19 +1023,32 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, parent_root->root_key.objectid, btrfs_ino(parent_inode), index, dentry->d_name.name, dentry->d_name.len); - BUG_ON(ret); dput(parent); + if (ret) + goto fail; key.offset = (u64)-1; pending->snap = btrfs_read_fs_root_no_name(root->fs_info, &key); - BUG_ON(IS_ERR(pending->snap)); + if (IS_ERR(pending->snap)) { + ret = PTR_ERR(pending->snap); + goto abort_trans; + } - btrfs_reloc_post_snapshot(trans, pending); + ret = btrfs_reloc_post_snapshot(trans, pending); + if (ret) + goto abort_trans; + ret = 0; fail: kfree(new_root_item); trans->block_rsv = rsv; btrfs_block_rsv_release(root, &pending->block_rsv, (u64)-1); - return 0; + return ret; + +abort_trans_dput: + dput(parent); +abort_trans: + btrfs_abort_transaction(trans, root, ret); + goto fail; } /* @@ -993,12 +1059,9 @@ static noinline int create_pending_snapshots(struct btrfs_trans_handle *trans, { struct btrfs_pending_snapshot *pending; struct list_head *head = &trans->transaction->pending_snapshots; - int ret; - list_for_each_entry(pending, head, list) { - ret = create_pending_snapshot(trans, fs_info, pending); - BUG_ON(ret); - } + list_for_each_entry(pending, head, list) + create_pending_snapshot(trans, fs_info, pending); return 0; } @@ -1122,6 +1185,33 @@ int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans, return 0; } + +static void cleanup_transaction(struct btrfs_trans_handle *trans, + struct btrfs_root *root) +{ + struct btrfs_transaction *cur_trans = trans->transaction; + + WARN_ON(trans->use_count > 1); + + spin_lock(&root->fs_info->trans_lock); + list_del_init(&cur_trans->list); + spin_unlock(&root->fs_info->trans_lock); + + btrfs_cleanup_one_transaction(trans->transaction, root); + + put_transaction(cur_trans); + put_transaction(cur_trans); + + trace_btrfs_transaction_commit(root); + + btrfs_scrub_continue(root); + + if (current->journal_info == trans) + current->journal_info = NULL; + + kmem_cache_free(btrfs_trans_handle_cachep, trans); +} + /* * btrfs_transaction state sequence: * in_commit = 0, blocked = 0 (initial) @@ -1133,10 +1223,10 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, struct btrfs_root *root) { unsigned long joined = 0; - struct btrfs_transaction *cur_trans; + struct btrfs_transaction *cur_trans = trans->transaction; struct btrfs_transaction *prev_trans = NULL; DEFINE_WAIT(wait); - int ret; + int ret = -EIO; int should_grow = 0; unsigned long now = get_seconds(); int flush_on_commit = btrfs_test_opt(root, FLUSHONCOMMIT); @@ -1146,13 +1236,18 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, btrfs_trans_release_metadata(trans, root); trans->block_rsv = NULL; + if (cur_trans->aborted) + goto cleanup_transaction; + /* make a pass through all the delayed refs we have so far * any runnings procs may add more while we are here */ ret = btrfs_run_delayed_refs(trans, root, 0); - BUG_ON(ret); + if (ret) + goto cleanup_transaction; cur_trans = trans->transaction; + /* * set the flushing flag so procs in this transaction have to * start sending their work down. @@ -1160,19 +1255,20 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, cur_trans->delayed_refs.flushing = 1; ret = btrfs_run_delayed_refs(trans, root, 0); - BUG_ON(ret); + if (ret) + goto cleanup_transaction; spin_lock(&cur_trans->commit_lock); if (cur_trans->in_commit) { spin_unlock(&cur_trans->commit_lock); atomic_inc(&cur_trans->use_count); - btrfs_end_transaction(trans, root); + ret = btrfs_end_transaction(trans, root); wait_for_commit(root, cur_trans); put_transaction(cur_trans); - return 0; + return ret; } trans->transaction->in_commit = 1; @@ -1212,12 +1308,12 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, if (flush_on_commit || snap_pending) { btrfs_start_delalloc_inodes(root, 1); - ret = btrfs_wait_ordered_extents(root, 0, 1); - BUG_ON(ret); + btrfs_wait_ordered_extents(root, 0, 1); } ret = btrfs_run_delayed_items(trans, root); - BUG_ON(ret); + if (ret) + goto cleanup_transaction; /* * rename don't use btrfs_join_transaction, so, once we @@ -1259,13 +1355,22 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, mutex_lock(&root->fs_info->reloc_mutex); ret = btrfs_run_delayed_items(trans, root); - BUG_ON(ret); + if (ret) { + mutex_unlock(&root->fs_info->reloc_mutex); + goto cleanup_transaction; + } ret = create_pending_snapshots(trans, root->fs_info); - BUG_ON(ret); + if (ret) { + mutex_unlock(&root->fs_info->reloc_mutex); + goto cleanup_transaction; + } ret = btrfs_run_delayed_refs(trans, root, (unsigned long)-1); - BUG_ON(ret); + if (ret) { + mutex_unlock(&root->fs_info->reloc_mutex); + goto cleanup_transaction; + } /* * make sure none of the code above managed to slip in a @@ -1292,7 +1397,10 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, mutex_lock(&root->fs_info->tree_log_mutex); ret = commit_fs_roots(trans, root); - BUG_ON(ret); + if (ret) { + mutex_unlock(&root->fs_info->tree_log_mutex); + goto cleanup_transaction; + } /* commit_fs_roots gets rid of all the tree log roots, it is now * safe to free the root of tree log roots @@ -1300,7 +1408,10 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, btrfs_free_log_root_tree(trans, root->fs_info); ret = commit_cowonly_roots(trans, root); - BUG_ON(ret); + if (ret) { + mutex_unlock(&root->fs_info->tree_log_mutex); + goto cleanup_transaction; + } btrfs_prepare_extent_commit(trans, root); @@ -1334,8 +1445,18 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, wake_up(&root->fs_info->transaction_wait); ret = btrfs_write_and_wait_transaction(trans, root); - BUG_ON(ret); - write_ctree_super(trans, root, 0); + if (ret) { + btrfs_error(root->fs_info, ret, + "Error while writing out transaction."); + mutex_unlock(&root->fs_info->tree_log_mutex); + goto cleanup_transaction; + } + + ret = write_ctree_super(trans, root, 0); + if (ret) { + mutex_unlock(&root->fs_info->tree_log_mutex); + goto cleanup_transaction; + } /* * the super is written, we can safely allow the tree-loggers @@ -1371,6 +1492,15 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, btrfs_run_delayed_iputs(root); return ret; + +cleanup_transaction: + btrfs_printk(root->fs_info, "Skipping commit of aborted transaction.\n"); +// WARN_ON(1); + if (current->journal_info == trans) + current->journal_info = NULL; + cleanup_transaction(trans, root); + + return ret; } /* @@ -1386,6 +1516,8 @@ int btrfs_clean_old_snapshots(struct btrfs_root *root) spin_unlock(&fs_info->trans_lock); while (!list_empty(&list)) { + int ret; + root = list_entry(list.next, struct btrfs_root, root_list); list_del(&root->root_list); @@ -1393,9 +1525,10 @@ int btrfs_clean_old_snapshots(struct btrfs_root *root) if (btrfs_header_backref_rev(root->node) < BTRFS_MIXED_BACKREF_REV) - btrfs_drop_snapshot(root, NULL, 0, 0); + ret = btrfs_drop_snapshot(root, NULL, 0, 0); else - btrfs_drop_snapshot(root, NULL, 1, 0); + ret =btrfs_drop_snapshot(root, NULL, 1, 0); + BUG_ON(ret < 0); } return 0; } diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h index 02564e6..fe27379 100644 --- a/fs/btrfs/transaction.h +++ b/fs/btrfs/transaction.h @@ -43,6 +43,7 @@ struct btrfs_transaction { wait_queue_head_t commit_wait; struct list_head pending_snapshots; struct btrfs_delayed_ref_root delayed_refs; + int aborted; }; struct btrfs_trans_handle { @@ -55,6 +56,7 @@ struct btrfs_trans_handle { struct btrfs_transaction *transaction; struct btrfs_block_rsv *block_rsv; struct btrfs_block_rsv *orig_rsv; + int aborted; }; struct btrfs_pending_snapshot { @@ -114,4 +116,5 @@ int btrfs_wait_marked_extents(struct btrfs_root *root, struct extent_io_tree *dirty_pages, int mark); int btrfs_transaction_blocked(struct btrfs_fs_info *info); int btrfs_transaction_in_commit(struct btrfs_fs_info *info); +void put_transaction(struct btrfs_transaction *transaction); #endif diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index 966cc74..d017283 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -212,14 +212,13 @@ int btrfs_pin_log_trans(struct btrfs_root *root) * indicate we're done making changes to the log tree * and wake up anyone waiting to do a sync */ -int btrfs_end_log_trans(struct btrfs_root *root) +void btrfs_end_log_trans(struct btrfs_root *root) { if (atomic_dec_and_test(&root->log_writers)) { smp_mb(); if (waitqueue_active(&root->log_writer_wait)) wake_up(&root->log_writer_wait); } - return 0; } @@ -378,12 +377,11 @@ insert: u32 found_size; found_size = btrfs_item_size_nr(path->nodes[0], path->slots[0]); - if (found_size > item_size) { + if (found_size > item_size) btrfs_truncate_item(trans, root, path, item_size, 1); - } else if (found_size < item_size) { - ret = btrfs_extend_item(trans, root, path, - item_size - found_size); - } + else if (found_size < item_size) + btrfs_extend_item(trans, root, path, + item_size - found_size); } else if (ret) { return ret; } @@ -1763,7 +1761,7 @@ static noinline int walk_down_log_tree(struct btrfs_trans_handle *trans, BTRFS_TREE_LOG_OBJECTID); ret = btrfs_free_and_pin_reserved_extent(root, bytenr, blocksize); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM or logic errors */ } free_extent_buffer(next); continue; @@ -1871,20 +1869,26 @@ static int walk_log_tree(struct btrfs_trans_handle *trans, wret = walk_down_log_tree(trans, log, path, &level, wc); if (wret > 0) break; - if (wret < 0) + if (wret < 0) { ret = wret; + goto out; + } wret = walk_up_log_tree(trans, log, path, &level, wc); if (wret > 0) break; - if (wret < 0) + if (wret < 0) { ret = wret; + goto out; + } } /* was the root node processed? if not, catch it here */ if (path->nodes[orig_level]) { - wc->process_func(log, path->nodes[orig_level], wc, + ret = wc->process_func(log, path->nodes[orig_level], wc, btrfs_header_generation(path->nodes[orig_level])); + if (ret) + goto out; if (wc->free) { struct extent_buffer *next; @@ -1900,10 +1904,11 @@ static int walk_log_tree(struct btrfs_trans_handle *trans, BTRFS_TREE_LOG_OBJECTID); ret = btrfs_free_and_pin_reserved_extent(log, next->start, next->len); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM or logic errors */ } } +out: for (i = 0; i <= orig_level; i++) { if (path->nodes[i]) { free_extent_buffer(path->nodes[i]); @@ -1963,8 +1968,8 @@ static int wait_log_commit(struct btrfs_trans_handle *trans, return 0; } -static int wait_for_writer(struct btrfs_trans_handle *trans, - struct btrfs_root *root) +static void wait_for_writer(struct btrfs_trans_handle *trans, + struct btrfs_root *root) { DEFINE_WAIT(wait); while (root->fs_info->last_trans_log_full_commit != @@ -1978,7 +1983,6 @@ static int wait_for_writer(struct btrfs_trans_handle *trans, mutex_lock(&root->log_mutex); finish_wait(&root->log_writer_wait, &wait); } - return 0; } /* @@ -2046,7 +2050,11 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans, * wait for them until later. */ ret = btrfs_write_marked_extents(log, &log->dirty_log_pages, mark); - BUG_ON(ret); + if (ret) { + btrfs_abort_transaction(trans, root, ret); + mutex_unlock(&root->log_mutex); + goto out; + } btrfs_set_root_node(&log->root_item, log->node); @@ -2077,7 +2085,11 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans, } if (ret) { - BUG_ON(ret != -ENOSPC); + if (ret != -ENOSPC) { + btrfs_abort_transaction(trans, root, ret); + mutex_unlock(&log_root_tree->log_mutex); + goto out; + } root->fs_info->last_trans_log_full_commit = trans->transid; btrfs_wait_marked_extents(log, &log->dirty_log_pages, mark); mutex_unlock(&log_root_tree->log_mutex); @@ -2117,7 +2129,11 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans, ret = btrfs_write_and_wait_marked_extents(log_root_tree, &log_root_tree->dirty_log_pages, EXTENT_DIRTY | EXTENT_NEW); - BUG_ON(ret); + if (ret) { + btrfs_abort_transaction(trans, root, ret); + mutex_unlock(&log_root_tree->log_mutex); + goto out_wake_log_root; + } btrfs_wait_marked_extents(log, &log->dirty_log_pages, mark); btrfs_set_super_log_root(root->fs_info->super_for_commit, @@ -2326,7 +2342,9 @@ out_unlock: if (ret == -ENOSPC) { root->fs_info->last_trans_log_full_commit = trans->transid; ret = 0; - } + } else if (ret < 0) + btrfs_abort_transaction(trans, root, ret); + btrfs_end_log_trans(root); return err; @@ -2357,7 +2375,8 @@ int btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans, if (ret == -ENOSPC) { root->fs_info->last_trans_log_full_commit = trans->transid; ret = 0; - } + } else if (ret < 0 && ret != -ENOENT) + btrfs_abort_transaction(trans, root, ret); btrfs_end_log_trans(root); return ret; @@ -3169,13 +3188,20 @@ int btrfs_recover_log_trees(struct btrfs_root *log_root_tree) fs_info->log_root_recovering = 1; trans = btrfs_start_transaction(fs_info->tree_root, 0); - BUG_ON(IS_ERR(trans)); + if (IS_ERR(trans)) { + ret = PTR_ERR(trans); + goto error; + } wc.trans = trans; wc.pin = 1; ret = walk_log_tree(trans, log_root_tree, &wc); - BUG_ON(ret); + if (ret) { + btrfs_error(fs_info, ret, "Failed to pin buffers while " + "recovering log root tree."); + goto error; + } again: key.objectid = BTRFS_TREE_LOG_OBJECTID; @@ -3184,8 +3210,12 @@ again: while (1) { ret = btrfs_search_slot(NULL, log_root_tree, &key, path, 0, 0); - if (ret < 0) - break; + + if (ret < 0) { + btrfs_error(fs_info, ret, + "Couldn't find tree log root."); + goto error; + } if (ret > 0) { if (path->slots[0] == 0) break; @@ -3199,14 +3229,24 @@ again: log = btrfs_read_fs_root_no_radix(log_root_tree, &found_key); - BUG_ON(IS_ERR(log)); + if (IS_ERR(log)) { + ret = PTR_ERR(log); + btrfs_error(fs_info, ret, + "Couldn't read tree log root."); + goto error; + } tmp_key.objectid = found_key.offset; tmp_key.type = BTRFS_ROOT_ITEM_KEY; tmp_key.offset = (u64)-1; wc.replay_dest = btrfs_read_fs_root_no_name(fs_info, &tmp_key); - BUG_ON(IS_ERR_OR_NULL(wc.replay_dest)); + if (IS_ERR(wc.replay_dest)) { + ret = PTR_ERR(wc.replay_dest); + btrfs_error(fs_info, ret, "Couldn't read target root " + "for tree log recovery."); + goto error; + } wc.replay_dest->log_root = log; btrfs_record_root_in_trans(trans, wc.replay_dest); @@ -3254,6 +3294,10 @@ again: kfree(log_root_tree); return 0; + +error: + btrfs_free_path(path); + return ret; } /* diff --git a/fs/btrfs/tree-log.h b/fs/btrfs/tree-log.h index 2270ac5..862ac81 100644 --- a/fs/btrfs/tree-log.h +++ b/fs/btrfs/tree-log.h @@ -38,7 +38,7 @@ int btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans, struct btrfs_root *root, const char *name, int name_len, struct inode *inode, u64 dirid); -int btrfs_end_log_trans(struct btrfs_root *root); +void btrfs_end_log_trans(struct btrfs_root *root); int btrfs_pin_log_trans(struct btrfs_root *root); int btrfs_log_inode_parent(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct inode *inode, diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 0b4e2af..a872b48 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -67,7 +67,7 @@ static void free_fs_devices(struct btrfs_fs_devices *fs_devices) kfree(fs_devices); } -int btrfs_cleanup_fs_uuids(void) +void btrfs_cleanup_fs_uuids(void) { struct btrfs_fs_devices *fs_devices; @@ -77,7 +77,6 @@ int btrfs_cleanup_fs_uuids(void) list_del(&fs_devices->list); free_fs_devices(fs_devices); } - return 0; } static noinline struct btrfs_device *__find_device(struct list_head *head, @@ -130,7 +129,7 @@ static void requeue_list(struct btrfs_pending_bios *pending_bios, * the list if the block device is congested. This way, multiple devices * can make progress from a single worker thread. */ -static noinline int run_scheduled_bios(struct btrfs_device *device) +static noinline void run_scheduled_bios(struct btrfs_device *device) { struct bio *pending; struct backing_dev_info *bdi; @@ -316,7 +315,6 @@ loop_lock: done: blk_finish_plug(&plug); - return 0; } static void pending_bios_fn(struct btrfs_work *work) @@ -455,16 +453,27 @@ error: return ERR_PTR(-ENOMEM); } -int btrfs_close_extra_devices(struct btrfs_fs_devices *fs_devices) +void btrfs_close_extra_devices(struct btrfs_fs_devices *fs_devices) { struct btrfs_device *device, *next; + struct block_device *latest_bdev = NULL; + u64 latest_devid = 0; + u64 latest_transid = 0; + mutex_lock(&uuid_mutex); again: /* This is the initialized path, it is safe to release the devices. */ list_for_each_entry_safe(device, next, &fs_devices->devices, dev_list) { - if (device->in_fs_metadata) + if (device->in_fs_metadata) { + if (!latest_transid || + device->generation > latest_transid) { + latest_devid = device->devid; + latest_transid = device->generation; + latest_bdev = device->bdev; + } continue; + } if (device->bdev) { blkdev_put(device->bdev, device->mode); @@ -487,8 +496,11 @@ again: goto again; } + fs_devices->latest_bdev = latest_bdev; + fs_devices->latest_devid = latest_devid; + fs_devices->latest_trans = latest_transid; + mutex_unlock(&uuid_mutex); - return 0; } static void __free_device(struct work_struct *work) @@ -537,10 +549,10 @@ static int __btrfs_close_devices(struct btrfs_fs_devices *fs_devices) fs_devices->num_can_discard--; new_device = kmalloc(sizeof(*new_device), GFP_NOFS); - BUG_ON(!new_device); + BUG_ON(!new_device); /* -ENOMEM */ memcpy(new_device, device, sizeof(*new_device)); new_device->name = kstrdup(device->name, GFP_NOFS); - BUG_ON(device->name && !new_device->name); + BUG_ON(device->name && !new_device->name); /* -ENOMEM */ new_device->bdev = NULL; new_device->writeable = 0; new_device->in_fs_metadata = 0; @@ -610,6 +622,8 @@ static int __btrfs_open_devices(struct btrfs_fs_devices *fs_devices, printk(KERN_INFO "open %s failed\n", device->name); goto error; } + filemap_write_and_wait(bdev->bd_inode->i_mapping); + invalidate_bdev(bdev); set_blocksize(bdev, 4096); bh = btrfs_read_dev_super(bdev); @@ -1024,8 +1038,10 @@ again: leaf = path->nodes[0]; extent = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_dev_extent); + } else { + btrfs_error(root->fs_info, ret, "Slot search failed"); + goto out; } - BUG_ON(ret); if (device->bytes_used > 0) { u64 len = btrfs_dev_extent_length(leaf, extent); @@ -1035,7 +1051,10 @@ again: spin_unlock(&root->fs_info->free_chunk_lock); } ret = btrfs_del_item(trans, root, path); - + if (ret) { + btrfs_error(root->fs_info, ret, + "Failed to remove dev extent item"); + } out: btrfs_free_path(path); return ret; @@ -1063,7 +1082,8 @@ int btrfs_alloc_dev_extent(struct btrfs_trans_handle *trans, key.type = BTRFS_DEV_EXTENT_KEY; ret = btrfs_insert_empty_item(trans, root, path, &key, sizeof(*extent)); - BUG_ON(ret); + if (ret) + goto out; leaf = path->nodes[0]; extent = btrfs_item_ptr(leaf, path->slots[0], @@ -1078,6 +1098,7 @@ int btrfs_alloc_dev_extent(struct btrfs_trans_handle *trans, btrfs_set_dev_extent_length(leaf, extent, num_bytes); btrfs_mark_buffer_dirty(leaf); +out: btrfs_free_path(path); return ret; } @@ -1103,7 +1124,7 @@ static noinline int find_next_chunk(struct btrfs_root *root, if (ret < 0) goto error; - BUG_ON(ret == 0); + BUG_ON(ret == 0); /* Corruption */ ret = btrfs_previous_item(root, path, 0, BTRFS_CHUNK_ITEM_KEY); if (ret) { @@ -1147,7 +1168,7 @@ static noinline int find_next_devid(struct btrfs_root *root, u64 *objectid) if (ret < 0) goto error; - BUG_ON(ret == 0); + BUG_ON(ret == 0); /* Corruption */ ret = btrfs_previous_item(root, path, BTRFS_DEV_ITEMS_OBJECTID, BTRFS_DEV_ITEM_KEY); @@ -1335,6 +1356,7 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path) } set_blocksize(bdev, 4096); + invalidate_bdev(bdev); bh = btrfs_read_dev_super(bdev); if (!bh) { ret = -EINVAL; @@ -1581,7 +1603,7 @@ next_slot: (unsigned long)btrfs_device_fsid(dev_item), BTRFS_UUID_SIZE); device = btrfs_find_device(root, devid, dev_uuid, fs_uuid); - BUG_ON(!device); + BUG_ON(!device); /* Logic error */ if (device->fs_devices->seeding) { btrfs_set_device_generation(leaf, dev_item, @@ -1691,7 +1713,7 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path) if (seeding_dev) { sb->s_flags &= ~MS_RDONLY; ret = btrfs_prepare_sprout(root); - BUG_ON(ret); + BUG_ON(ret); /* -ENOMEM */ } device->fs_devices = root->fs_info->fs_devices; @@ -1729,11 +1751,15 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path) if (seeding_dev) { ret = init_first_rw_device(trans, root, device); - BUG_ON(ret); + if (ret) + goto error_trans; ret = btrfs_finish_sprout(trans, root); - BUG_ON(ret); + if (ret) + goto error_trans; } else { ret = btrfs_add_device(trans, root, device); + if (ret) + goto error_trans; } /* @@ -1743,17 +1769,31 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path) btrfs_clear_space_info_full(root->fs_info); unlock_chunks(root); - btrfs_commit_transaction(trans, root); + ret = btrfs_commit_transaction(trans, root); if (seeding_dev) { mutex_unlock(&uuid_mutex); up_write(&sb->s_umount); + if (ret) /* transaction commit */ + return ret; + ret = btrfs_relocate_sys_chunks(root); - BUG_ON(ret); + if (ret < 0) + btrfs_error(root->fs_info, ret, + "Failed to relocate sys chunks after " + "device initialization. This can be fixed " + "using the \"btrfs balance\" command."); } return ret; + +error_trans: + unlock_chunks(root); + btrfs_abort_transaction(trans, root, ret); + btrfs_end_transaction(trans, root); + kfree(device->name); + kfree(device); error: blkdev_put(bdev, FMODE_EXCL); if (seeding_dev) { @@ -1861,10 +1901,20 @@ static int btrfs_free_chunk(struct btrfs_trans_handle *trans, key.type = BTRFS_CHUNK_ITEM_KEY; ret = btrfs_search_slot(trans, root, &key, path, -1, 1); - BUG_ON(ret); + if (ret < 0) + goto out; + else if (ret > 0) { /* Logic error or corruption */ + btrfs_error(root->fs_info, -ENOENT, + "Failed lookup while freeing chunk."); + ret = -ENOENT; + goto out; + } ret = btrfs_del_item(trans, root, path); - + if (ret < 0) + btrfs_error(root->fs_info, ret, + "Failed to delete chunk item."); +out: btrfs_free_path(path); return ret; } @@ -1953,7 +2003,7 @@ static int btrfs_relocate_chunk(struct btrfs_root *root, em = lookup_extent_mapping(em_tree, chunk_offset, 1); read_unlock(&em_tree->lock); - BUG_ON(em->start > chunk_offset || + BUG_ON(!em || em->start > chunk_offset || em->start + em->len < chunk_offset); map = (struct map_lookup *)em->bdev; @@ -2026,7 +2076,7 @@ again: ret = btrfs_search_slot(NULL, chunk_root, &key, path, 0, 0); if (ret < 0) goto error; - BUG_ON(ret == 0); + BUG_ON(ret == 0); /* Corruption */ ret = btrfs_previous_item(chunk_root, path, key.objectid, key.type); @@ -2235,15 +2285,13 @@ static void unset_balance_control(struct btrfs_fs_info *fs_info) * Balance filters. Return 1 if chunk should be filtered out * (should not be balanced). */ -static int chunk_profiles_filter(u64 chunk_profile, +static int chunk_profiles_filter(u64 chunk_type, struct btrfs_balance_args *bargs) { - chunk_profile &= BTRFS_BLOCK_GROUP_PROFILE_MASK; + chunk_type = chunk_to_extended(chunk_type) & + BTRFS_EXTENDED_PROFILE_MASK; - if (chunk_profile == 0) - chunk_profile = BTRFS_AVAIL_ALLOC_BIT_SINGLE; - - if (bargs->profiles & chunk_profile) + if (bargs->profiles & chunk_type) return 0; return 1; @@ -2350,18 +2398,16 @@ static int chunk_vrange_filter(struct extent_buffer *leaf, return 1; } -static int chunk_soft_convert_filter(u64 chunk_profile, +static int chunk_soft_convert_filter(u64 chunk_type, struct btrfs_balance_args *bargs) { if (!(bargs->flags & BTRFS_BALANCE_ARGS_CONVERT)) return 0; - chunk_profile &= BTRFS_BLOCK_GROUP_PROFILE_MASK; - - if (chunk_profile == 0) - chunk_profile = BTRFS_AVAIL_ALLOC_BIT_SINGLE; + chunk_type = chunk_to_extended(chunk_type) & + BTRFS_EXTENDED_PROFILE_MASK; - if (bargs->target & chunk_profile) + if (bargs->target == chunk_type) return 1; return 0; @@ -2587,6 +2633,30 @@ error: return ret; } +/** + * alloc_profile_is_valid - see if a given profile is valid and reduced + * @flags: profile to validate + * @extended: if true @flags is treated as an extended profile + */ +static int alloc_profile_is_valid(u64 flags, int extended) +{ + u64 mask = (extended ? BTRFS_EXTENDED_PROFILE_MASK : + BTRFS_BLOCK_GROUP_PROFILE_MASK); + + flags &= ~BTRFS_BLOCK_GROUP_TYPE_MASK; + + /* 1) check that all other bits are zeroed */ + if (flags & ~mask) + return 0; + + /* 2) see if profile is reduced */ + if (flags == 0) + return !extended; /* "0" is valid for usual profiles */ + + /* true if exactly one bit set */ + return (flags & (flags - 1)) == 0; +} + static inline int balance_need_close(struct btrfs_fs_info *fs_info) { /* cancel requested || normal exit path */ @@ -2615,6 +2685,7 @@ int btrfs_balance(struct btrfs_balance_control *bctl, { struct btrfs_fs_info *fs_info = bctl->fs_info; u64 allowed; + int mixed = 0; int ret; if (btrfs_fs_closing(fs_info) || @@ -2624,13 +2695,16 @@ int btrfs_balance(struct btrfs_balance_control *bctl, goto out; } + allowed = btrfs_super_incompat_flags(fs_info->super_copy); + if (allowed & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) + mixed = 1; + /* * In case of mixed groups both data and meta should be picked, * and identical options should be given for both of them. */ - allowed = btrfs_super_incompat_flags(fs_info->super_copy); - if ((allowed & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) && - (bctl->flags & (BTRFS_BALANCE_DATA | BTRFS_BALANCE_METADATA))) { + allowed = BTRFS_BALANCE_DATA | BTRFS_BALANCE_METADATA; + if (mixed && (bctl->flags & allowed)) { if (!(bctl->flags & BTRFS_BALANCE_DATA) || !(bctl->flags & BTRFS_BALANCE_METADATA) || memcmp(&bctl->data, &bctl->meta, sizeof(bctl->data))) { @@ -2641,14 +2715,6 @@ int btrfs_balance(struct btrfs_balance_control *bctl, } } - /* - * Profile changing sanity checks. Skip them if a simple - * balance is requested. - */ - if (!((bctl->data.flags | bctl->sys.flags | bctl->meta.flags) & - BTRFS_BALANCE_ARGS_CONVERT)) - goto do_balance; - allowed = BTRFS_AVAIL_ALLOC_BIT_SINGLE; if (fs_info->fs_devices->num_devices == 1) allowed |= BTRFS_BLOCK_GROUP_DUP; @@ -2658,24 +2724,27 @@ int btrfs_balance(struct btrfs_balance_control *bctl, allowed |= (BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1 | BTRFS_BLOCK_GROUP_RAID10); - if (!profile_is_valid(bctl->data.target, 1) || - bctl->data.target & ~allowed) { + if ((bctl->data.flags & BTRFS_BALANCE_ARGS_CONVERT) && + (!alloc_profile_is_valid(bctl->data.target, 1) || + (bctl->data.target & ~allowed))) { printk(KERN_ERR "btrfs: unable to start balance with target " "data profile %llu\n", (unsigned long long)bctl->data.target); ret = -EINVAL; goto out; } - if (!profile_is_valid(bctl->meta.target, 1) || - bctl->meta.target & ~allowed) { + if ((bctl->meta.flags & BTRFS_BALANCE_ARGS_CONVERT) && + (!alloc_profile_is_valid(bctl->meta.target, 1) || + (bctl->meta.target & ~allowed))) { printk(KERN_ERR "btrfs: unable to start balance with target " "metadata profile %llu\n", (unsigned long long)bctl->meta.target); ret = -EINVAL; goto out; } - if (!profile_is_valid(bctl->sys.target, 1) || - bctl->sys.target & ~allowed) { + if ((bctl->sys.flags & BTRFS_BALANCE_ARGS_CONVERT) && + (!alloc_profile_is_valid(bctl->sys.target, 1) || + (bctl->sys.target & ~allowed))) { printk(KERN_ERR "btrfs: unable to start balance with target " "system profile %llu\n", (unsigned long long)bctl->sys.target); @@ -2683,7 +2752,9 @@ int btrfs_balance(struct btrfs_balance_control *bctl, goto out; } - if (bctl->data.target & BTRFS_BLOCK_GROUP_DUP) { + /* allow dup'ed data chunks only in mixed mode */ + if (!mixed && (bctl->data.flags & BTRFS_BALANCE_ARGS_CONVERT) && + (bctl->data.target & BTRFS_BLOCK_GROUP_DUP)) { printk(KERN_ERR "btrfs: dup for data is not allowed\n"); ret = -EINVAL; goto out; @@ -2709,7 +2780,6 @@ int btrfs_balance(struct btrfs_balance_control *bctl, } } -do_balance: ret = insert_balance_item(fs_info->tree_root, bctl); if (ret && ret != -EEXIST) goto out; @@ -2952,7 +3022,7 @@ again: key.offset = (u64)-1; key.type = BTRFS_DEV_EXTENT_KEY; - while (1) { + do { ret = btrfs_search_slot(NULL, root, &key, path, 0, 0); if (ret < 0) goto done; @@ -2994,8 +3064,7 @@ again: goto done; if (ret == -ENOSPC) failed++; - key.offset -= 1; - } + } while (key.offset-- > 0); if (failed && !retried) { failed = 0; @@ -3113,11 +3182,7 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans, int i; int j; - if ((type & BTRFS_BLOCK_GROUP_RAID1) && - (type & BTRFS_BLOCK_GROUP_DUP)) { - WARN_ON(1); - type &= ~BTRFS_BLOCK_GROUP_DUP; - } + BUG_ON(!alloc_profile_is_valid(type, 0)); if (list_empty(&fs_devices->alloc_list)) return -ENOSPC; @@ -3313,13 +3378,15 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans, write_lock(&em_tree->lock); ret = add_extent_mapping(em_tree, em); write_unlock(&em_tree->lock); - BUG_ON(ret); free_extent_map(em); + if (ret) + goto error; ret = btrfs_make_block_group(trans, extent_root, 0, type, BTRFS_FIRST_CHUNK_TREE_OBJECTID, start, num_bytes); - BUG_ON(ret); + if (ret) + goto error; for (i = 0; i < map->num_stripes; ++i) { struct btrfs_device *device; @@ -3332,7 +3399,10 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans, info->chunk_root->root_key.objectid, BTRFS_FIRST_CHUNK_TREE_OBJECTID, start, dev_offset, stripe_size); - BUG_ON(ret); + if (ret) { + btrfs_abort_transaction(trans, extent_root, ret); + goto error; + } } kfree(devices_info); @@ -3368,7 +3438,8 @@ static int __finish_chunk_alloc(struct btrfs_trans_handle *trans, device = map->stripes[index].dev; device->bytes_used += stripe_size; ret = btrfs_update_device(trans, device); - BUG_ON(ret); + if (ret) + goto out_free; index++; } @@ -3405,16 +3476,19 @@ static int __finish_chunk_alloc(struct btrfs_trans_handle *trans, key.offset = chunk_offset; ret = btrfs_insert_item(trans, chunk_root, &key, chunk, item_size); - BUG_ON(ret); - if (map->type & BTRFS_BLOCK_GROUP_SYSTEM) { + if (ret == 0 && map->type & BTRFS_BLOCK_GROUP_SYSTEM) { + /* + * TODO: Cleanup of inserted chunk root in case of + * failure. + */ ret = btrfs_add_system_chunk(chunk_root, &key, chunk, item_size); - BUG_ON(ret); } +out_free: kfree(chunk); - return 0; + return ret; } /* @@ -3446,7 +3520,8 @@ int btrfs_alloc_chunk(struct btrfs_trans_handle *trans, ret = __finish_chunk_alloc(trans, extent_root, map, chunk_offset, chunk_size, stripe_size); - BUG_ON(ret); + if (ret) + return ret; return 0; } @@ -3478,7 +3553,8 @@ static noinline int init_first_rw_device(struct btrfs_trans_handle *trans, ret = __btrfs_alloc_chunk(trans, extent_root, &map, &chunk_size, &stripe_size, chunk_offset, alloc_profile); - BUG_ON(ret); + if (ret) + return ret; sys_chunk_offset = chunk_offset + chunk_size; @@ -3489,10 +3565,12 @@ static noinline int init_first_rw_device(struct btrfs_trans_handle *trans, ret = __btrfs_alloc_chunk(trans, extent_root, &sys_map, &sys_chunk_size, &sys_stripe_size, sys_chunk_offset, alloc_profile); - BUG_ON(ret); + if (ret) + goto abort; ret = btrfs_add_device(trans, fs_info->chunk_root, device); - BUG_ON(ret); + if (ret) + goto abort; /* * Modifying chunk tree needs allocating new blocks from both @@ -3502,13 +3580,20 @@ static noinline int init_first_rw_device(struct btrfs_trans_handle *trans, */ ret = __finish_chunk_alloc(trans, extent_root, map, chunk_offset, chunk_size, stripe_size); - BUG_ON(ret); + if (ret) + goto abort; ret = __finish_chunk_alloc(trans, extent_root, sys_map, sys_chunk_offset, sys_chunk_size, sys_stripe_size); - BUG_ON(ret); + if (ret) + goto abort; + return 0; + +abort: + btrfs_abort_transaction(trans, root, ret); + return ret; } int btrfs_chunk_readonly(struct btrfs_root *root, u64 chunk_offset) @@ -3859,7 +3944,7 @@ int btrfs_rmap_block(struct btrfs_mapping_tree *map_tree, do_div(length, map->num_stripes); buf = kzalloc(sizeof(u64) * map->num_stripes, GFP_NOFS); - BUG_ON(!buf); + BUG_ON(!buf); /* -ENOMEM */ for (i = 0; i < map->num_stripes; i++) { if (devid && map->stripes[i].dev->devid != devid) @@ -3952,7 +4037,7 @@ struct async_sched { * This will add one bio to the pending list for a device and make sure * the work struct is scheduled. */ -static noinline int schedule_bio(struct btrfs_root *root, +static noinline void schedule_bio(struct btrfs_root *root, struct btrfs_device *device, int rw, struct bio *bio) { @@ -3964,7 +4049,7 @@ static noinline int schedule_bio(struct btrfs_root *root, bio_get(bio); btrfsic_submit_bio(rw, bio); bio_put(bio); - return 0; + return; } /* @@ -3998,7 +4083,6 @@ static noinline int schedule_bio(struct btrfs_root *root, if (should_queue) btrfs_queue_worker(&root->fs_info->submit_workers, &device->work); - return 0; } int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio, @@ -4021,7 +4105,8 @@ int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio, ret = btrfs_map_block(map_tree, rw, logical, &map_length, &bbio, mirror_num); - BUG_ON(ret); + if (ret) /* -ENOMEM */ + return ret; total_devs = bbio->num_stripes; if (map_length < length) { @@ -4040,7 +4125,7 @@ int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio, while (dev_nr < total_devs) { if (dev_nr < total_devs - 1) { bio = bio_clone(first_bio, GFP_NOFS); - BUG_ON(!bio); + BUG_ON(!bio); /* -ENOMEM */ } else { bio = first_bio; } @@ -4194,13 +4279,13 @@ static int read_one_chunk(struct btrfs_root *root, struct btrfs_key *key, write_lock(&map_tree->map_tree.lock); ret = add_extent_mapping(&map_tree->map_tree, em); write_unlock(&map_tree->map_tree.lock); - BUG_ON(ret); + BUG_ON(ret); /* Tree corruption */ free_extent_map(em); return 0; } -static int fill_device_from_item(struct extent_buffer *leaf, +static void fill_device_from_item(struct extent_buffer *leaf, struct btrfs_dev_item *dev_item, struct btrfs_device *device) { @@ -4217,8 +4302,6 @@ static int fill_device_from_item(struct extent_buffer *leaf, ptr = (unsigned long)btrfs_device_uuid(dev_item); read_extent_buffer(leaf, device->uuid, ptr, BTRFS_UUID_SIZE); - - return 0; } static int open_seed_devices(struct btrfs_root *root, u8 *fsid) @@ -4356,6 +4439,20 @@ int btrfs_read_sys_array(struct btrfs_root *root) return -ENOMEM; btrfs_set_buffer_uptodate(sb); btrfs_set_buffer_lockdep_class(root->root_key.objectid, sb, 0); + /* + * The sb extent buffer is artifical and just used to read the system array. + * btrfs_set_buffer_uptodate() call does not properly mark all it's + * pages up-to-date when the page is larger: extent does not cover the + * whole page and consequently check_page_uptodate does not find all + * the page's extents up-to-date (the hole beyond sb), + * write_extent_buffer then triggers a WARN_ON. + * + * Regular short extents go through mark_extent_buffer_dirty/writeback cycle, + * but sb spans only this function. Add an explicit SetPageUptodate call + * to silence the warning eg. on PowerPC 64. + */ + if (PAGE_CACHE_SIZE > BTRFS_SUPER_INFO_SIZE) + SetPageUptodate(sb->pages[0]); write_extent_buffer(sb, super_copy, 0, BTRFS_SUPER_INFO_SIZE); array_size = btrfs_super_sys_array_size(super_copy); diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h index 19ac950..bb6b03f 100644 --- a/fs/btrfs/volumes.h +++ b/fs/btrfs/volumes.h @@ -260,12 +260,12 @@ int btrfs_open_devices(struct btrfs_fs_devices *fs_devices, int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder, struct btrfs_fs_devices **fs_devices_ret); int btrfs_close_devices(struct btrfs_fs_devices *fs_devices); -int btrfs_close_extra_devices(struct btrfs_fs_devices *fs_devices); +void btrfs_close_extra_devices(struct btrfs_fs_devices *fs_devices); int btrfs_add_device(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_device *device); int btrfs_rm_device(struct btrfs_root *root, char *device_path); -int btrfs_cleanup_fs_uuids(void); +void btrfs_cleanup_fs_uuids(void); int btrfs_num_copies(struct btrfs_mapping_tree *map_tree, u64 logical, u64 len); int btrfs_grow_device(struct btrfs_trans_handle *trans, struct btrfs_device *device, u64 new_size); diff --git a/fs/btrfs/zlib.c b/fs/btrfs/zlib.c index faccd47..92c2065 100644 --- a/fs/btrfs/zlib.c +++ b/fs/btrfs/zlib.c @@ -370,9 +370,9 @@ static int zlib_decompress(struct list_head *ws, unsigned char *data_in, PAGE_CACHE_SIZE - buf_offset); bytes = min(bytes, bytes_left); - kaddr = kmap_atomic(dest_page, KM_USER0); + kaddr = kmap_atomic(dest_page); memcpy(kaddr + pg_offset, workspace->buf + buf_offset, bytes); - kunmap_atomic(kaddr, KM_USER0); + kunmap_atomic(kaddr); pg_offset += bytes; bytes_left -= bytes; |
