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| author | Miao Xie <miaox@cn.fujitsu.com> | 2014-03-06 06:55:03 +0100 |
|---|---|---|
| committer | Josef Bacik <jbacik@fb.com> | 2014-03-10 20:17:29 +0100 |
| commit | 573bfb72f7608eb7097d2dd036a714a6ab20cffe (patch) | |
| tree | 5434c2e82299cf22af4470fef31d3890d209a0b9 /fs/btrfs/disk-io.c | |
| parent | Btrfs: split the global ordered extents mutex (diff) | |
| download | linux-573bfb72f7608eb7097d2dd036a714a6ab20cffe.tar.xz linux-573bfb72f7608eb7097d2dd036a714a6ab20cffe.zip | |
Btrfs: fix possible empty list access when flushing the delalloc inodes
We didn't have a lock to protect the access to the delalloc inodes list, that is
we might access a empty delalloc inodes list if someone start flushing delalloc
inodes because the delalloc inodes were moved into a other list temporarily.
Fix it by wrapping the access with a lock.
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Diffstat (limited to 'fs/btrfs/disk-io.c')
| -rw-r--r-- | fs/btrfs/disk-io.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 237b5b5a2200..d9698fda2d12 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -1221,6 +1221,7 @@ static void __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize, mutex_init(&root->objectid_mutex); mutex_init(&root->log_mutex); mutex_init(&root->ordered_extent_mutex); + mutex_init(&root->delalloc_mutex); init_waitqueue_head(&root->log_writer_wait); init_waitqueue_head(&root->log_commit_wait[0]); init_waitqueue_head(&root->log_commit_wait[1]); @@ -2209,6 +2210,7 @@ int open_ctree(struct super_block *sb, spin_lock_init(&fs_info->buffer_lock); rwlock_init(&fs_info->tree_mod_log_lock); mutex_init(&fs_info->reloc_mutex); + mutex_init(&fs_info->delalloc_root_mutex); seqlock_init(&fs_info->profiles_lock); init_completion(&fs_info->kobj_unregister); |