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| author | Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> | 2011-04-20 10:08:16 +0000 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2011-05-23 13:24:43 -0400 |
| commit | 0c1daee085cff1395d1eba4ad6faff7810a594d8 (patch) | |
| tree | a7c86b2b7aaed74e8a4daebc3f1d8da6875c1e1b /fs | |
| parent | c9513edb0079f97749c2ac00c887a22c4ba44792 (diff) | |
| download | linux-stable-0c1daee085cff1395d1eba4ad6faff7810a594d8.tar.gz linux-stable-0c1daee085cff1395d1eba4ad6faff7810a594d8.tar.bz2 linux-stable-0c1daee085cff1395d1eba4ad6faff7810a594d8.zip | |
Btrfs: fix the race between remove dev and alloc chunk
On remove device path, it updates device->dev_alloc_list but does not hold
chunk lock
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/volumes.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 43c4f09e441c..ee197ec28547 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -1291,7 +1291,9 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path) } if (device->writeable) { + lock_chunks(root); list_del_init(&device->dev_alloc_list); + unlock_chunks(root); root->fs_info->fs_devices->rw_devices--; } @@ -1345,7 +1347,9 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path) } fs_devices->seed = device->fs_devices->seed; device->fs_devices->seed = NULL; + lock_chunks(root); __btrfs_close_devices(device->fs_devices); + unlock_chunks(root); free_fs_devices(device->fs_devices); } @@ -1377,8 +1381,10 @@ out: return ret; error_undo: if (device->writeable) { + lock_chunks(root); list_add(&device->dev_alloc_list, &root->fs_info->fs_devices->alloc_list); + unlock_chunks(root); root->fs_info->fs_devices->rw_devices++; } goto error_brelse; |