diff options
| author | Anand Jain <anand.jain@oracle.com> | 2023-10-04 23:00:26 +0800 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2023-10-12 16:44:18 +0200 |
| commit | ac6ea6a914ed477902ceed64e988a493b52c6c71 (patch) | |
| tree | 02f2896bcdcccca0706deb0e328900f5ba249aa0 /fs/btrfs | |
| parent | c47b02c1bddf7c4d56e01bccc99e73ae5309fe07 (diff) | |
btrfs: disable the device add feature for temp-fsid
The device addition operation will transform the cloned temp-fsid mounted
device into a multi-device filesystem. Therefore, it is marked as
unsupported.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/ioctl.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index ab4ddbebeb16..89cd212735ea 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -2635,6 +2635,12 @@ static long btrfs_ioctl_add_dev(struct btrfs_fs_info *fs_info, void __user *arg) return -EINVAL; } + if (fs_info->fs_devices->temp_fsid) { + btrfs_err(fs_info, + "device add not supported on cloned temp-fsid mount"); + return -EINVAL; + } + if (!btrfs_exclop_start(fs_info, BTRFS_EXCLOP_DEV_ADD)) { if (!btrfs_exclop_start_try_lock(fs_info, BTRFS_EXCLOP_DEV_ADD)) return BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS; |