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[v4,07/10] btrfs: introduce helper for creating cloned devices with mkfs

Message ID 75f514c0b05e138c5fb03921c25a8309ce9a3c33.1709162170.git.anand.jain@oracle.com (mailing list archive)
State New, archived
Headers show
Series btrfs: functional test cases for tempfsid | expand

Commit Message

Anand Jain Feb. 29, 2024, 1:49 a.m. UTC 
Use newer mkfs.btrfs option to generate two cloned devices,
used in test cases.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
---
 common/btrfs | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
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Patch

diff --git a/common/btrfs b/common/btrfs
index fe6fc2196e68..7141a0bb7b78 100644
--- a/common/btrfs
+++ b/common/btrfs
@@ -843,3 +843,26 @@  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
+
+	_require_btrfs_command inspect-internal dump-super
+	_require_btrfs_mkfs_uuid_option
+
+	[[ -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
+}