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authorYan Zheng <zheng.yan@oracle.com>2009-02-12 14:14:53 -0500
committerChris Mason <chris.mason@oracle.com>2009-02-12 14:14:53 -0500
commit2456242530a21cfee82646ebeeda65d3f74faa4c (patch)
treec0e8f5eda96cefeb44a48f05a248ea22b4259ad2 /fs/btrfs/transaction.c
parent4008c04a07c73ec3cb1be4c1391d2159a8f75d6d (diff)
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.c2
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);
}