On Thu, Feb 15, 2024 at 02:34:07PM +0800, Anand Jain wrote:
> check_fsid() provides a method to verify if the given device is mounted
> with the tempfsid in the kernel. Function sb() is an internal only
> function.
>
> Signed-off-by: Anand Jain <anand.jain@xxxxxxxxxx>
> ---
> common/btrfs | 34 ++++++++++++++++++++++++++++++++++
> 1 file changed, 34 insertions(+)
>
> diff --git a/common/btrfs b/common/btrfs
> index e1b29c613767..5cba9b16b4de 100644
> --- a/common/btrfs
> +++ b/common/btrfs
> @@ -792,3 +792,37 @@ _has_btrfs_sysfs_feature_attr()
>
> test -e /sys/fs/btrfs/features/$feature_attr
> }
> +
> +# Dump key members of the on-disk super-block from the given disk; helps debug
> +sb()
> +{
> + local dev1=$1
> + local parameters="device|devid|^metadata_uuid|^fsid|^incom|^generation|\
> + ^flags| \|$| \)$|compat_flags|compat_ro_flags|dev_item.uuid"
> +
> + $BTRFS_UTIL_PROG inspect-internal dump-super $dev1 | egrep "$parameters"
Please don't use "egrep", it's deprecated, might hit a warning output.
Replace it with "grep -E" :)
> +}
> +
> +check_fsid()
> +{
> + local dev1=$1
> + local fsid
> +
> + # on disk fsid
> + fsid=$(sb $dev1 | grep ^fsid | awk -d" " '{print $2}')
> + echo -e "On disk fsid:\t\t$fsid" | sed -e "s/$fsid/FSID/g"
> +
> + echo -e -n "Metadata uuid:\t\t"
> + cat /sys/fs/btrfs/$fsid/metadata_uuid | sed -e "s/$fsid/FSID/g"
> +
> + # This returns the temp_fsid if set
> + tempfsid=$(_btrfs_get_fsid $dev1)
> + if [[ $tempfsid == $fsid ]]; then
> + echo -e "Temp fsid:\t\tFSID"
> + else
> + echo -e "Temp fsid:\t\tTEMPFSID"
> + fi
> +
> + echo -e -n "Tempfsid status:\t"
> + cat /sys/fs/btrfs/$tempfsid/temp_fsid
> +}
> --
> 2.39.3
>
>
