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common: Add _dmsetup_create and _dmsetup_remove helpers

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Make sure both "$UDEV_SETTLE_PROG" and "mknodes" can always
be run after a dm create or remove operation.

Suggested-by: Dave Chinner <david@fromorbit.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
This commit is contained in:
Xiao Yang
2018-06-28 09:45:34 +08:00
committed by Eryu Guan
parent 6b6ff4a005
commit f86ce7cc4b
8 changed files with 42 additions and 58 deletions
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common/dmflakey
+3 -11
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@@ -20,9 +20,8 @@ _init_flakey()
FLAKEY_TABLE="0 $BLK_DEV_SIZE flakey $SCRATCH_DEV 0 180 0"
FLAKEY_TABLE_DROP="0 $BLK_DEV_SIZE flakey $SCRATCH_DEV 0 0 180 1 drop_writes"
FLAKEY_TABLE_ERROR="0 $BLK_DEV_SIZE flakey $SCRATCH_DEV 0 0 180 1 error_writes"
$DMSETUP_PROG create flakey-test --table "$FLAKEY_TABLE" || \
_dmsetup_create flakey-test --table "$FLAKEY_TABLE" || \
_fatal "failed to create flakey device"
$DMSETUP_PROG mknodes > /dev/null 2>&1
}
_mount_flakey()
@@ -42,11 +41,7 @@ _cleanup_flakey()
# otherwise the umount will hang
$DMSETUP_PROG resume flakey-test > /dev/null 2>&1
$UMOUNT_PROG $SCRATCH_MNT > /dev/null 2>&1
# wait for device to be fully settled so that 'dmsetup remove' doesn't
# fail due to EBUSY
$UDEV_SETTLE_PROG >/dev/null 2>&1
$DMSETUP_PROG remove flakey-test > /dev/null 2>&1
$DMSETUP_PROG mknodes > /dev/null 2>&1
_dmsetup_remove flakey-test
}
# _load_flakey_table <table> [lockfs]
@@ -101,11 +96,8 @@ _require_flakey_with_error_writes()
SIZE=`blockdev --getsz $SCRATCH_DEV`
TABLE="0 $SIZE flakey $SCRATCH_DEV 0 0 180 1 error_writes"
$DMSETUP_PROG create $NAME --table "$TABLE" >/dev/null 2>&1
if [ $? -ne 0 ]; then
_dmsetup_create $NAME --table "$TABLE" || \
_notrun "This test requires error_writes feature in dm-flakey"
fi
$DMSETUP_PROG mknodes >/dev/null 2>&1
_cleanup_flakey
}