diff options
Diffstat (limited to 'fs/btrfs/inode.c')
-rw-r--r-- | fs/btrfs/inode.c | 151 |
1 files changed, 104 insertions, 47 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index d3d4448..5f805bc 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -394,6 +394,14 @@ static noinline int compress_file_range(struct inode *inode, (start > 0 || end + 1 < BTRFS_I(inode)->disk_i_size)) btrfs_add_inode_defrag(NULL, inode); + /* + * skip compression for a small file range(<=blocksize) that + * isn't an inline extent, since it dosen't save disk space at all. + */ + if ((end - start + 1) <= blocksize && + (start > 0 || end + 1 < BTRFS_I(inode)->disk_i_size)) + goto cleanup_and_bail_uncompressed; + actual_end = min_t(u64, isize, end + 1); again: will_compress = 0; @@ -864,7 +872,8 @@ static noinline int cow_file_range(struct inode *inode, if (btrfs_is_free_space_inode(inode)) { WARN_ON_ONCE(1); - return -EINVAL; + ret = -EINVAL; + goto out_unlock; } num_bytes = ALIGN(end - start + 1, blocksize); @@ -1075,17 +1084,15 @@ static int cow_file_range_async(struct inode *inode, struct page *locked_page, async_cow->end = cur_end; INIT_LIST_HEAD(&async_cow->extents); - async_cow->work.func = async_cow_start; - async_cow->work.ordered_func = async_cow_submit; - async_cow->work.ordered_free = async_cow_free; - async_cow->work.flags = 0; + btrfs_init_work(&async_cow->work, async_cow_start, + async_cow_submit, async_cow_free); nr_pages = (cur_end - start + PAGE_CACHE_SIZE) >> PAGE_CACHE_SHIFT; atomic_add(nr_pages, &root->fs_info->async_delalloc_pages); - btrfs_queue_worker(&root->fs_info->delalloc_workers, - &async_cow->work); + btrfs_queue_work(root->fs_info->delalloc_workers, + &async_cow->work); if (atomic_read(&root->fs_info->async_delalloc_pages) > limit) { wait_event(root->fs_info->async_submit_wait, @@ -1272,6 +1279,15 @@ next_slot: disk_bytenr += cur_offset - found_key.offset; num_bytes = min(end + 1, extent_end) - cur_offset; /* + * if there are pending snapshots for this root, + * we fall into common COW way. + */ + if (!nolock) { + err = btrfs_start_nocow_write(root); + if (!err) + goto out_check; + } + /* * force cow if csum exists in the range. * this ensure that csum for a given extent are * either valid or do not exist. @@ -1290,6 +1306,8 @@ next_slot: out_check: if (extent_end <= start) { path->slots[0]++; + if (!nolock && nocow) + btrfs_end_nocow_write(root); goto next_slot; } if (!nocow) { @@ -1307,8 +1325,11 @@ out_check: ret = cow_file_range(inode, locked_page, cow_start, found_key.offset - 1, page_started, nr_written, 1); - if (ret) + if (ret) { + if (!nolock && nocow) + btrfs_end_nocow_write(root); goto error; + } cow_start = (u64)-1; } @@ -1355,8 +1376,11 @@ out_check: BTRFS_DATA_RELOC_TREE_OBJECTID) { ret = btrfs_reloc_clone_csums(inode, cur_offset, num_bytes); - if (ret) + if (ret) { + if (!nolock && nocow) + btrfs_end_nocow_write(root); goto error; + } } extent_clear_unlock_delalloc(inode, cur_offset, @@ -1364,6 +1388,8 @@ out_check: locked_page, EXTENT_LOCKED | EXTENT_DELALLOC, PAGE_UNLOCK | PAGE_SET_PRIVATE2); + if (!nolock && nocow) + btrfs_end_nocow_write(root); cur_offset = extent_end; if (cur_offset > end) break; @@ -1843,9 +1869,9 @@ static int btrfs_writepage_start_hook(struct page *page, u64 start, u64 end) SetPageChecked(page); page_cache_get(page); - fixup->work.func = btrfs_writepage_fixup_worker; + btrfs_init_work(&fixup->work, btrfs_writepage_fixup_worker, NULL, NULL); fixup->page = page; - btrfs_queue_worker(&root->fs_info->fixup_workers, &fixup->work); + btrfs_queue_work(root->fs_info->fixup_workers, &fixup->work); return -EBUSY; } @@ -2239,6 +2265,11 @@ static noinline int relink_extent_backref(struct btrfs_path *path, return PTR_ERR(root); } + if (btrfs_root_readonly(root)) { + srcu_read_unlock(&fs_info->subvol_srcu, index); + return 0; + } + /* step 2: get inode */ key.objectid = backref->inum; key.type = BTRFS_INODE_ITEM_KEY; @@ -2759,7 +2790,7 @@ static int btrfs_writepage_end_io_hook(struct page *page, u64 start, u64 end, struct inode *inode = page->mapping->host; struct btrfs_root *root = BTRFS_I(inode)->root; struct btrfs_ordered_extent *ordered_extent = NULL; - struct btrfs_workers *workers; + struct btrfs_workqueue *workers; trace_btrfs_writepage_end_io_hook(page, start, end, uptodate); @@ -2768,14 +2799,13 @@ static int btrfs_writepage_end_io_hook(struct page *page, u64 start, u64 end, end - start + 1, uptodate)) return 0; - ordered_extent->work.func = finish_ordered_fn; - ordered_extent->work.flags = 0; + btrfs_init_work(&ordered_extent->work, finish_ordered_fn, NULL, NULL); if (btrfs_is_free_space_inode(inode)) - workers = &root->fs_info->endio_freespace_worker; + workers = root->fs_info->endio_freespace_worker; else - workers = &root->fs_info->endio_write_workers; - btrfs_queue_worker(workers, &ordered_extent->work); + workers = root->fs_info->endio_write_workers; + btrfs_queue_work(workers, &ordered_extent->work); return 0; } @@ -4593,7 +4623,7 @@ static void evict_inode_truncate_pages(struct inode *inode) struct rb_node *node; ASSERT(inode->i_state & I_FREEING); - truncate_inode_pages(&inode->i_data, 0); + truncate_inode_pages_final(&inode->i_data); write_lock(&map_tree->lock); while (!RB_EMPTY_ROOT(&map_tree->map)) { @@ -4924,7 +4954,8 @@ void btrfs_invalidate_inodes(struct btrfs_root *root) struct inode *inode; u64 objectid = 0; - WARN_ON(btrfs_root_refs(&root->root_item) != 0); + if (!test_bit(BTRFS_FS_STATE_ERROR, &root->fs_info->fs_state)) + WARN_ON(btrfs_root_refs(&root->root_item) != 0); spin_lock(&root->inode_lock); again: @@ -5799,6 +5830,7 @@ static int btrfs_mknod(struct inode *dir, struct dentry *dentry, } out_unlock: btrfs_end_transaction(trans, root); + btrfs_balance_delayed_items(root); btrfs_btree_balance_dirty(root); if (drop_inode) { inode_dec_link_count(inode); @@ -5872,6 +5904,7 @@ out_unlock: inode_dec_link_count(inode); iput(inode); } + btrfs_balance_delayed_items(root); btrfs_btree_balance_dirty(root); return err; } @@ -5930,6 +5963,7 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir, } btrfs_end_transaction(trans, root); + btrfs_balance_delayed_items(root); fail: if (drop_inode) { inode_dec_link_count(inode); @@ -5996,6 +6030,7 @@ out_fail: btrfs_end_transaction(trans, root); if (drop_on_err) iput(inode); + btrfs_balance_delayed_items(root); btrfs_btree_balance_dirty(root); return err; } @@ -6550,6 +6585,7 @@ noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, int ret; struct extent_buffer *leaf; struct btrfs_root *root = BTRFS_I(inode)->root; + struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree; struct btrfs_file_extent_item *fi; struct btrfs_key key; u64 disk_bytenr; @@ -6626,6 +6662,20 @@ noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, if (btrfs_extent_readonly(root, disk_bytenr)) goto out; + + num_bytes = min(offset + *len, extent_end) - offset; + if (!nocow && found_type == BTRFS_FILE_EXTENT_PREALLOC) { + u64 range_end; + + range_end = round_up(offset + num_bytes, root->sectorsize) - 1; + ret = test_range_bit(io_tree, offset, range_end, + EXTENT_DELALLOC, 0, NULL); + if (ret) { + ret = -EAGAIN; + goto out; + } + } + btrfs_release_path(path); /* @@ -6654,7 +6704,6 @@ noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, */ disk_bytenr += backref_offset; disk_bytenr += offset - key.offset; - num_bytes = min(offset + *len, extent_end) - offset; if (csum_exist_in_range(root, disk_bytenr, num_bytes)) goto out; /* @@ -7024,10 +7073,9 @@ again: if (!ret) goto out_test; - ordered->work.func = finish_ordered_fn; - ordered->work.flags = 0; - btrfs_queue_worker(&root->fs_info->endio_write_workers, - &ordered->work); + btrfs_init_work(&ordered->work, finish_ordered_fn, NULL, NULL); + btrfs_queue_work(root->fs_info->endio_write_workers, + &ordered->work); out_test: /* * our bio might span multiple ordered extents. If we haven't @@ -7404,15 +7452,15 @@ static ssize_t btrfs_direct_IO(int rw, struct kiocb *iocb, smp_mb__after_atomic_inc(); /* - * The generic stuff only does filemap_write_and_wait_range, which isn't - * enough if we've written compressed pages to this area, so we need to - * call btrfs_wait_ordered_range to make absolutely sure that any - * outstanding dirty pages are on disk. + * The generic stuff only does filemap_write_and_wait_range, which + * isn't enough if we've written compressed pages to this area, so + * we need to flush the dirty pages again to make absolutely sure + * that any outstanding dirty pages are on disk. */ count = iov_length(iov, nr_segs); - ret = btrfs_wait_ordered_range(inode, offset, count); - if (ret) - return ret; + if (test_bit(BTRFS_INODE_HAS_ASYNC_EXTENT, + &BTRFS_I(inode)->runtime_flags)) + filemap_fdatawrite_range(inode->i_mapping, offset, count); if (rw & WRITE) { /* @@ -8404,7 +8452,7 @@ struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode, work->inode = inode; work->wait = wait; work->delay_iput = delay_iput; - work->work.func = btrfs_run_delalloc_work; + btrfs_init_work(&work->work, btrfs_run_delalloc_work, NULL, NULL); return work; } @@ -8419,7 +8467,8 @@ void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work) * some fairly slow code that needs optimization. This walks the list * of all the inodes with pending delalloc and forces them to disk. */ -static int __start_delalloc_inodes(struct btrfs_root *root, int delay_iput) +static int __start_delalloc_inodes(struct btrfs_root *root, int delay_iput, + int nr) { struct btrfs_inode *binode; struct inode *inode; @@ -8431,6 +8480,7 @@ static int __start_delalloc_inodes(struct btrfs_root *root, int delay_iput) INIT_LIST_HEAD(&works); INIT_LIST_HEAD(&splice); + mutex_lock(&root->delalloc_mutex); spin_lock(&root->delalloc_lock); list_splice_init(&root->delalloc_inodes, &splice); while (!list_empty(&splice)) { @@ -8456,19 +8506,16 @@ static int __start_delalloc_inodes(struct btrfs_root *root, int delay_iput) goto out; } list_add_tail(&work->list, &works); - btrfs_queue_worker(&root->fs_info->flush_workers, - &work->work); - + btrfs_queue_work(root->fs_info->flush_workers, + &work->work); + ret++; + if (nr != -1 && ret >= nr) + goto out; cond_resched(); spin_lock(&root->delalloc_lock); } spin_unlock(&root->delalloc_lock); - list_for_each_entry_safe(work, next, &works, list) { - list_del_init(&work->list); - btrfs_wait_and_free_delalloc_work(work); - } - return 0; out: list_for_each_entry_safe(work, next, &works, list) { list_del_init(&work->list); @@ -8480,6 +8527,7 @@ out: list_splice_tail(&splice, &root->delalloc_inodes); spin_unlock(&root->delalloc_lock); } + mutex_unlock(&root->delalloc_mutex); return ret; } @@ -8490,7 +8538,9 @@ int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput) if (test_bit(BTRFS_FS_STATE_ERROR, &root->fs_info->fs_state)) return -EROFS; - ret = __start_delalloc_inodes(root, delay_iput); + ret = __start_delalloc_inodes(root, delay_iput, -1); + if (ret > 0) + ret = 0; /* * the filemap_flush will queue IO into the worker threads, but * we have to make sure the IO is actually started and that @@ -8507,7 +8557,8 @@ int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput) return ret; } -int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput) +int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput, + int nr) { struct btrfs_root *root; struct list_head splice; @@ -8518,9 +8569,10 @@ int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput) INIT_LIST_HEAD(&splice); + mutex_lock(&fs_info->delalloc_root_mutex); spin_lock(&fs_info->delalloc_root_lock); list_splice_init(&fs_info->delalloc_roots, &splice); - while (!list_empty(&splice)) { + while (!list_empty(&splice) && nr) { root = list_first_entry(&splice, struct btrfs_root, delalloc_root); root = btrfs_grab_fs_root(root); @@ -8529,15 +8581,20 @@ int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput) &fs_info->delalloc_roots); spin_unlock(&fs_info->delalloc_root_lock); - ret = __start_delalloc_inodes(root, delay_iput); + ret = __start_delalloc_inodes(root, delay_iput, nr); btrfs_put_fs_root(root); - if (ret) + if (ret < 0) goto out; + if (nr != -1) { + nr -= ret; + WARN_ON(nr < 0); + } spin_lock(&fs_info->delalloc_root_lock); } spin_unlock(&fs_info->delalloc_root_lock); + ret = 0; atomic_inc(&fs_info->async_submit_draining); while (atomic_read(&fs_info->nr_async_submits) || atomic_read(&fs_info->async_delalloc_pages)) { @@ -8546,13 +8603,13 @@ int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput) atomic_read(&fs_info->async_delalloc_pages) == 0)); } atomic_dec(&fs_info->async_submit_draining); - return 0; out: if (!list_empty_careful(&splice)) { spin_lock(&fs_info->delalloc_root_lock); list_splice_tail(&splice, &fs_info->delalloc_roots); spin_unlock(&fs_info->delalloc_root_lock); } + mutex_unlock(&fs_info->delalloc_root_mutex); return ret; } |