diff options
Diffstat (limited to 'fs/btrfs/transaction.c')
-rw-r--r-- | fs/btrfs/transaction.c | 87 |
1 files changed, 47 insertions, 40 deletions
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index 34cd831..7579f6d 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -75,10 +75,21 @@ void btrfs_put_transaction(struct btrfs_transaction *transaction) } } -static noinline void switch_commit_root(struct btrfs_root *root) +static noinline void switch_commit_roots(struct btrfs_transaction *trans, + struct btrfs_fs_info *fs_info) { - free_extent_buffer(root->commit_root); - root->commit_root = btrfs_root_node(root); + struct btrfs_root *root, *tmp; + + down_write(&fs_info->commit_root_sem); + list_for_each_entry_safe(root, tmp, &trans->switch_commits, + dirty_list) { + list_del_init(&root->dirty_list); + free_extent_buffer(root->commit_root); + root->commit_root = btrfs_root_node(root); + if (is_fstree(root->objectid)) + btrfs_unpin_free_ino(root); + } + up_write(&fs_info->commit_root_sem); } static inline void extwriter_counter_inc(struct btrfs_transaction *trans, @@ -208,6 +219,7 @@ loop: INIT_LIST_HEAD(&cur_trans->pending_snapshots); INIT_LIST_HEAD(&cur_trans->ordered_operations); INIT_LIST_HEAD(&cur_trans->pending_chunks); + INIT_LIST_HEAD(&cur_trans->switch_commits); list_add_tail(&cur_trans->list, &fs_info->trans_list); extent_io_tree_init(&cur_trans->dirty_pages, fs_info->btree_inode->i_mapping); @@ -375,7 +387,8 @@ start_transaction(struct btrfs_root *root, u64 num_items, unsigned int type, if (test_bit(BTRFS_FS_STATE_ERROR, &root->fs_info->fs_state)) return ERR_PTR(-EROFS); - if (current->journal_info) { + if (current->journal_info && + current->journal_info != (void *)BTRFS_SEND_TRANS_STUB) { WARN_ON(type & TRANS_EXTWRITERS); h = current->journal_info; h->use_count++; @@ -683,7 +696,8 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans, int lock = (trans->type != TRANS_JOIN_NOLOCK); int err = 0; - if (--trans->use_count) { + if (trans->use_count > 1) { + trans->use_count--; trans->block_rsv = trans->orig_rsv; return 0; } @@ -731,17 +745,10 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans, } if (lock && ACCESS_ONCE(cur_trans->state) == TRANS_STATE_BLOCKED) { - if (throttle) { - /* - * We may race with somebody else here so end up having - * to call end_transaction on ourselves again, so inc - * our use_count. - */ - trans->use_count++; + if (throttle) return btrfs_commit_transaction(trans, root); - } else { + else wake_up_process(info->transaction_kthread); - } } if (trans->type & __TRANS_FREEZABLE) @@ -925,9 +932,6 @@ static int update_cowonly_root(struct btrfs_trans_handle *trans, return ret; } - if (root != root->fs_info->extent_root) - switch_commit_root(root); - return 0; } @@ -983,15 +987,16 @@ static noinline int commit_cowonly_roots(struct btrfs_trans_handle *trans, list_del_init(next); root = list_entry(next, struct btrfs_root, dirty_list); + if (root != fs_info->extent_root) + list_add_tail(&root->dirty_list, + &trans->transaction->switch_commits); ret = update_cowonly_root(trans, root); if (ret) return ret; } - down_write(&fs_info->extent_commit_sem); - switch_commit_root(fs_info->extent_root); - up_write(&fs_info->extent_commit_sem); - + list_add_tail(&fs_info->extent_root->dirty_list, + &trans->transaction->switch_commits); btrfs_after_dev_replace_commit(fs_info); return 0; @@ -1048,11 +1053,8 @@ static noinline int commit_fs_roots(struct btrfs_trans_handle *trans, smp_wmb(); if (root->commit_root != root->node) { - mutex_lock(&root->fs_commit_mutex); - switch_commit_root(root); - btrfs_unpin_free_ino(root); - mutex_unlock(&root->fs_commit_mutex); - + list_add_tail(&root->dirty_list, + &trans->transaction->switch_commits); btrfs_set_root_node(&root->root_item, root->node); } @@ -1578,10 +1580,9 @@ static void cleanup_transaction(struct btrfs_trans_handle *trans, trace_btrfs_transaction_commit(root); - btrfs_scrub_continue(root); - if (current->journal_info == trans) current->journal_info = NULL; + btrfs_scrub_cancel(root->fs_info); kmem_cache_free(btrfs_trans_handle_cachep, trans); } @@ -1621,7 +1622,7 @@ static int btrfs_flush_all_pending_stuffs(struct btrfs_trans_handle *trans, static inline int btrfs_start_delalloc_flush(struct btrfs_fs_info *fs_info) { if (btrfs_test_opt(fs_info->tree_root, FLUSHONCOMMIT)) - return btrfs_start_delalloc_roots(fs_info, 1); + return btrfs_start_delalloc_roots(fs_info, 1, -1); return 0; } @@ -1754,7 +1755,7 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, /* ->aborted might be set after the previous check, so check it */ if (unlikely(ACCESS_ONCE(cur_trans->aborted))) { ret = cur_trans->aborted; - goto cleanup_transaction; + goto scrub_continue; } /* * the reloc mutex makes sure that we stop @@ -1771,7 +1772,7 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, ret = create_pending_snapshots(trans, root->fs_info); if (ret) { mutex_unlock(&root->fs_info->reloc_mutex); - goto cleanup_transaction; + goto scrub_continue; } /* @@ -1787,13 +1788,13 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, ret = btrfs_run_delayed_items(trans, root); if (ret) { mutex_unlock(&root->fs_info->reloc_mutex); - goto cleanup_transaction; + goto scrub_continue; } ret = btrfs_run_delayed_refs(trans, root, (unsigned long)-1); if (ret) { mutex_unlock(&root->fs_info->reloc_mutex); - goto cleanup_transaction; + goto scrub_continue; } /* @@ -1823,7 +1824,7 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, if (ret) { mutex_unlock(&root->fs_info->tree_log_mutex); mutex_unlock(&root->fs_info->reloc_mutex); - goto cleanup_transaction; + goto scrub_continue; } /* @@ -1844,7 +1845,7 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, if (ret) { mutex_unlock(&root->fs_info->tree_log_mutex); mutex_unlock(&root->fs_info->reloc_mutex); - goto cleanup_transaction; + goto scrub_continue; } /* @@ -1855,7 +1856,7 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, ret = cur_trans->aborted; mutex_unlock(&root->fs_info->tree_log_mutex); mutex_unlock(&root->fs_info->reloc_mutex); - goto cleanup_transaction; + goto scrub_continue; } btrfs_prepare_extent_commit(trans, root); @@ -1864,11 +1865,15 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, btrfs_set_root_node(&root->fs_info->tree_root->root_item, root->fs_info->tree_root->node); - switch_commit_root(root->fs_info->tree_root); + list_add_tail(&root->fs_info->tree_root->dirty_list, + &cur_trans->switch_commits); btrfs_set_root_node(&root->fs_info->chunk_root->root_item, root->fs_info->chunk_root->node); - switch_commit_root(root->fs_info->chunk_root); + list_add_tail(&root->fs_info->chunk_root->dirty_list, + &cur_trans->switch_commits); + + switch_commit_roots(cur_trans, root->fs_info); assert_qgroups_uptodate(trans); update_super_roots(root); @@ -1891,13 +1896,13 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, btrfs_error(root->fs_info, ret, "Error while writing out transaction"); mutex_unlock(&root->fs_info->tree_log_mutex); - goto cleanup_transaction; + goto scrub_continue; } ret = write_ctree_super(trans, root, 0); if (ret) { mutex_unlock(&root->fs_info->tree_log_mutex); - goto cleanup_transaction; + goto scrub_continue; } /* @@ -1940,6 +1945,8 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, return ret; +scrub_continue: + btrfs_scrub_continue(root); cleanup_transaction: btrfs_trans_release_metadata(trans, root); trans->block_rsv = NULL; |