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| author | Ilya Dryomov <idryomov@gmail.com> | 2011-02-15 18:14:25 +0000 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2011-02-16 15:37:59 -0500 |
| commit | 9b3517e9136824346227b7b04f8f7ea1f3a726cc (patch) | |
| tree | b317f5ed612c5adae478a7acd48f6d8096a1656d /fs | |
| parent | ca9b688c1c9a21635cfc8af8b68565b154185196 (diff) | |
| download | blackbird-obmc-linux-9b3517e9136824346227b7b04f8f7ea1f3a726cc.tar.gz blackbird-obmc-linux-9b3517e9136824346227b7b04f8f7ea1f3a726cc.zip | |
Btrfs: make btrfs_rm_device() fail gracefully
If shrinking done as part of the online device removal fails add that
device back to the allocation list and increment the rw_devices counter.
This fixes two bugs:
1) we could have a perfectly good device out of alloc list for no good
reason;
2) in the btrfs consisting of two devices, failure in btrfs_rm_device()
could lead to a situation where it was impossible to remove any of the
devices because of the "unable to remove the only writeable device"
error.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/volumes.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index dadaaa8005c8..f31c33119bb6 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -1337,11 +1337,11 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path) ret = btrfs_shrink_device(device, 0); if (ret) - goto error_brelse; + goto error_undo; ret = btrfs_rm_dev_item(root->fs_info->chunk_root, device); if (ret) - goto error_brelse; + goto error_undo; device->in_fs_metadata = 0; @@ -1415,6 +1415,13 @@ out: mutex_unlock(&root->fs_info->volume_mutex); mutex_unlock(&uuid_mutex); return ret; +error_undo: + if (device->writeable) { + list_add(&device->dev_alloc_list, + &root->fs_info->fs_devices->alloc_list); + root->fs_info->fs_devices->rw_devices++; + } + goto error_brelse; } /* |
