Using $(findmnt -n -o UUID mount-directory) only works on
util-linux v2.38, not on 2.37. Even debian-testing has util-linux
v2.37, so use a mechanism which has worked for longer to fetch the
UUID.
Without this the test fails on permission failure on accessing
the file /sys/fs/btrfs/"$uuid"/bg_reclaim_threshold as $uuid is
empty. So while at it, add a check to ensure the UUID is never
empty.
Use $AWK_PROG in case the preferred awk program is not the
preferred awk program.
Cc: Karel Zak <kzak@xxxxxxxxxx>
Cc: Pankaj Raghav <p.raghav@xxxxxxxxxxx>
Signed-off-by: Luis Chamberlain <mcgrof@xxxxxxxxxx>
---
tests/btrfs/237 | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/tests/btrfs/237 b/tests/btrfs/237
index 5168777e..96940549 100755
--- a/tests/btrfs/237
+++ b/tests/btrfs/237
@@ -41,7 +41,14 @@ zonesize=$((zonesize << 9))
_scratch_mkfs >/dev/null 2>&1
_scratch_mount -o commit=1 # 1s commit time to speed up test
-uuid=$(findmnt -n -o UUID "$SCRATCH_MNT")
+uuid=$($BTRFS_UTIL_PROG filesystem show $SCRATCH_DEV |grep uuid: |\
+ $AWK_PROG '{print $NF}')
+
+if [[ "$uuid" == "" ]]; then
+ echo "UUID for $SCRATCH_DEV is empty, this is not expected"
+ exit 1
+fi
+
reclaim_threshold=75
echo $reclaim_threshold > /sys/fs/btrfs/"$uuid"/bg_reclaim_threshold
fill_percent=$((reclaim_threshold + 2))
--
2.34.1
