[PATCH v2 07/10] btrfs: introduce helper for creating cloned devices with mkfs

Anand Jain
2024-02-19T19:49:53Z

Use newer mkfs.btrfs option to generate two cloned devices,
used in test cases.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
---
v2:
Organize changes to its right patch.
Fix _fail erorr message.
Declare local variables for fsid and uuid.

common/btrfs | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)

diff --git a/common/btrfs b/common/btrfs
index f694afac3d13..c3e5827562d6 100644
--- a/common/btrfs
+++ b/common/btrfs
@@ -838,3 +838,24 @@ check_fsid()
echo -e -n "Tempfsid status:\t"
cat /sys/fs/btrfs/$tempfsid/temp_fsid
}
+
+mkfs_clone()
+{
+ local fsid
+ local uuid
+ local dev1=$1
+ local dev2=$2
+
+ [[ -z $dev1 || -z $dev2 ]] && \
+ _fail "mkfs_clone requires two devices as arguments"
+
+ _mkfs_dev -fq $dev1
+
+ fsid=$($BTRFS_UTIL_PROG inspect-internal dump-super $dev1 | \
+ grep -E ^fsid | $AWK_PROG '{print $2}')
+ uuid=$($BTRFS_UTIL_PROG inspect-internal dump-super $dev1 | \
+ grep -E ^dev_item.uuid | $AWK_PROG '{print $2}')
+
+ _mkfs_dev -fq --uuid $fsid --device-uuid $uuid $dev2
+}
+>>>>>>> e22bb3c816c1 (btrfs: introduce helper for creating cloned devices with mkfs)
--
2.39.3