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Commit d31c32f6 authored by Anand Jain's avatar Anand Jain Committed by David Sterba
Browse files

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: default avatarAnand Jain <anand.jain@oracle.com>
Reviewed-by: default avatarNikolay Borisov <nborisov@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 0af2c4bf

fs/btrfs/volumes.c

+9 −5
Original line number Diff line number Diff line
@@ -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);