xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Btrfs: fix possible empty list access when flushing the delalloc inodes

Browse Source 
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>
This commit is contained in:
Miao Xie
2014-03-06 13:55:03 +08:00
committed by Josef Bacik
parent 31f3d255c6
commit 573bfb72f7
3 changed files with 8 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
fs/btrfs/ctree.h
View File

@@ -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