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| author | Miao Xie | 2014-03-06 06:55:03 +0100 |
|---|---|---|
| committer | Josef Bacik | 2014-03-10 20:17:29 +0100 |
| commit | 573bfb72f7608eb7097d2dd036a714a6ab20cffe (patch) | |
| tree | 5434c2e82299cf22af4470fef31d3890d209a0b9 /fs/btrfs/ctree.h | |
| parent | Btrfs: split the global ordered extents mutex (diff) | |
| download | kernel-qcow2-linux-573bfb72f7608eb7097d2dd036a714a6ab20cffe.tar.gz kernel-qcow2-linux-573bfb72f7608eb7097d2dd036a714a6ab20cffe.tar.xz kernel-qcow2-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/ctree.h')
| -rw-r--r-- | fs/btrfs/ctree.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 5f4921554f0a..2a9d32e193a5 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -1490,6 +1490,7 @@ struct btrfs_fs_info { */ struct list_head ordered_roots; + struct mutex delalloc_root_mutex; spinlock_t delalloc_root_lock; /* all fs/file tree roots that have delalloc inodes. */ struct list_head delalloc_roots; @@ -1805,6 +1806,7 @@ struct btrfs_root { spinlock_t root_item_lock; atomic_t refs; + struct mutex delalloc_mutex; spinlock_t delalloc_lock; /* * all of the inodes that have delalloc bytes. It is possible for |