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"
+}
+
+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
