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| author | Yan Zheng <zheng.yan@oracle.com> | 2009-02-12 22:14:53 +0300 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2009-02-12 22:14:53 +0300 |
| commit | 2456242530a21cfee82646ebeeda65d3f74faa4c (patch) | |
| tree | c0e8f5eda96cefeb44a48f05a248ea22b4259ad2 /fs/btrfs | |
| parent | 4008c04a07c73ec3cb1be4c1391d2159a8f75d6d (diff) | |
| download | linux-2456242530a21cfee82646ebeeda65d3f74faa4c.tar.xz | |
Btrfs: hold trans_mutex when using btrfs_record_root_in_trans
btrfs_record_root_in_trans needs the trans_mutex held to make sure two
callers don't race to setup the root in a given transaction. This adds
it to all the places that were missing it.
Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/extent-tree.c | 2 | ||||
| -rw-r--r-- | fs/btrfs/transaction.c | 2 | ||||
| -rw-r--r-- | fs/btrfs/tree-log.c | 2 |
3 files changed, 6 insertions, 0 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index cd86bffbdc9f..0a5d796c9f7e 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -5658,7 +5658,9 @@ static noinline int relocate_one_extent(struct btrfs_root *extent_root, prev_block = block_start; } + mutex_lock(&extent_root->fs_info->trans_mutex); btrfs_record_root_in_trans(found_root); + mutex_unlock(&extent_root->fs_info->trans_mutex); if (ref_path->owner_objectid >= BTRFS_FIRST_FREE_OBJECTID) { /* * try to update data extent references while diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index 919172de5c9a..4112d53d4f4d 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -688,7 +688,9 @@ static noinline int drop_dirty_roots(struct btrfs_root *tree_root, num_bytes -= btrfs_root_used(&dirty->root->root_item); bytes_used = btrfs_root_used(&root->root_item); if (num_bytes) { + mutex_lock(&root->fs_info->trans_mutex); btrfs_record_root_in_trans(root); + mutex_unlock(&root->fs_info->trans_mutex); btrfs_set_root_used(&root->root_item, bytes_used - num_bytes); } diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index 20794290256b..9c462fbd60fa 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -2832,7 +2832,9 @@ again: BUG_ON(!wc.replay_dest); wc.replay_dest->log_root = log; + mutex_lock(&fs_info->trans_mutex); btrfs_record_root_in_trans(wc.replay_dest); + mutex_unlock(&fs_info->trans_mutex); ret = walk_log_tree(trans, log, &wc); BUG_ON(ret); |