btrfs: fix BUG_ON in btrfs_init_new_device()
Instead of BUG_ON return error to the caller. And handle the fail
condition by calling the abort transaction and going through the
error path.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 0be58b5..911bee9 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -2394,7 +2394,10 @@ int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path
if (seeding_dev) {
sb->s_flags &= ~MS_RDONLY;
ret = btrfs_prepare_sprout(fs_info);
- BUG_ON(ret); /* -ENOMEM */
+ if (ret) {
+ btrfs_abort_transaction(trans, ret);
+ goto error_trans;
+ }
}
device->fs_devices = fs_info->fs_devices;
@@ -2440,14 +2443,14 @@ int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path
mutex_unlock(&fs_info->chunk_mutex);
if (ret) {
btrfs_abort_transaction(trans, ret);
- goto error_trans;
+ goto error_sysfs;
}
}
ret = btrfs_add_device(trans, fs_info, device);
if (ret) {
btrfs_abort_transaction(trans, ret);
- goto error_trans;
+ goto error_sysfs;
}
if (seeding_dev) {
@@ -2456,7 +2459,7 @@ int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path
ret = btrfs_finish_sprout(trans, fs_info);
if (ret) {
btrfs_abort_transaction(trans, ret);
- goto error_trans;
+ goto error_sysfs;
}
/* Sprouting would change fsid of the mounted root,
@@ -2495,12 +2498,13 @@ int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path
update_dev_time(device_path);
return ret;
+error_sysfs:
+ btrfs_sysfs_rm_device_link(fs_info->fs_devices, device);
error_trans:
if (seeding_dev)
sb->s_flags |= MS_RDONLY;
btrfs_end_transaction(trans);
rcu_string_free(device->name);
- btrfs_sysfs_rm_device_link(fs_info->fs_devices, device);
kfree(device);
error:
blkdev_put(bdev, FMODE_EXCL);
