[PATCH v2 1/3] fstests: use udevadm settle after pvremove
From: Luis Chamberlain
Date: Wed Aug 11 2021 - 11:45:25 EST
As with creation, we also need to use udevadm settle
when removing a pv, otherwise we can trip on races with
module removals for the block devices in use.
This reduces the amount of time in which a block device
module refcnt for test modules such as scsi_debug spends
outside of 0.
Races with the refcnt being greater than 0 means module
removal can fail causing false positives. This helps
ensure that the pv is really long gone. These issues
are tracked for scsi_debug [0] and later found to be a
generic issue regardless of filesystem with pvremove [1].
Using udevadm settle *helps*, it does not address all
possible races with the refcnt as noted in the generic
bug entry [1].
[0] https://bugzilla.kernel.org/show_bug.cgi?id=212337
[1] https://bugzilla.kernel.org/show_bug.cgi?id=214015
Signed-off-by: Luis Chamberlain <mcgrof@xxxxxxxxxx>
---
tests/generic/081 | 5 ++++-
tests/generic/108 | 1 +
tests/generic/459 | 1 +
3 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/tests/generic/081 b/tests/generic/081
index f795b2c1..8e552074 100755
--- a/tests/generic/081
+++ b/tests/generic/081
@@ -12,6 +12,7 @@ _begin_fstest auto quick
# Override the default cleanup function.
_cleanup()
{
+ local pv_ret
cd /
rm -f $tmp.*
@@ -34,7 +35,9 @@ _cleanup()
$UMOUNT_PROG $mnt >> $seqres.full 2>&1
$LVM_PROG vgremove -f $vgname >>$seqres.full 2>&1
$LVM_PROG pvremove -f $SCRATCH_DEV >>$seqres.full 2>&1
- test $? -eq 0 && break
+ pv_ret=$?
+ $UDEV_SETTLE_PROG
+ test $pv_ret -eq 0 && break
sleep 2
done
}
diff --git a/tests/generic/108 b/tests/generic/108
index 7dd426c1..b7797e8f 100755
--- a/tests/generic/108
+++ b/tests/generic/108
@@ -21,6 +21,7 @@ _cleanup()
$UMOUNT_PROG $SCRATCH_MNT >>$seqres.full 2>&1
$LVM_PROG vgremove -f $vgname >>$seqres.full 2>&1
$LVM_PROG pvremove -f $SCRATCH_DEV $SCSI_DEBUG_DEV >>$seqres.full 2>&1
+ $UDEV_SETTLE_PROG
_put_scsi_debug_dev
rm -f $tmp.*
}
diff --git a/tests/generic/459 b/tests/generic/459
index e5e5e9ab..5b44e245 100755
--- a/tests/generic/459
+++ b/tests/generic/459
@@ -29,6 +29,7 @@ _cleanup()
$UMOUNT_PROG $SCRATCH_MNT >>$seqres.full 2>&1
$LVM_PROG vgremove -ff $vgname >>$seqres.full 2>&1
$LVM_PROG pvremove -ff $SCRATCH_DEV >>$seqres.full 2>&1
+ $UDEV_SETTLE_PROG
}
# Import common functions.
--
2.30.2