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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/transaction.c | |
| 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/transaction.c')
| -rw-r--r-- | fs/btrfs/transaction.c | 2 |
1 files changed, 2 insertions, 0 deletions
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); } |