Re: [PATCH blktests 0/2] zbd: Support dm-crypt

[Shinichiro Kawasaki <shinichiro.kawasaki@wdc.com>]

On Jul 26, 2021 / 12:02, Omar Sandoval wrote:
> On Tue, Jul 13, 2021 at 07:12:37PM +0900, Shin'ichiro Kawasaki wrote:
> > Linux kernel 5.9 added zoned block device support to dm-crypt. With this zoned
> > dm-crypt device, zbd group test cases pass except zbd/007. This series makes
> > required changes to allow the test case zbd/007 pass with zoned dm-cyrpt
> > devices. The first patch adds dm-crypt support to the helper function
> > _get_dev_container_and_sector(). The second patch wipes out broken data on the
> > dm-crypt devices which was left after the test case run.
> > 
> > Shin'ichiro Kawasaki (2):
> >   zbd/rc: Support dm-crypt
> >   zbd/007: Reset test target zones at test end
> > 
> >  tests/zbd/007 |  7 +++++++
> >  tests/zbd/rc  | 20 ++++++++++++++------
> >  2 files changed, 21 insertions(+), 6 deletions(-)
> 
> The patches look reasonable. Could you provide instructions on how to
> run with zoned dm-crypt so I can run the tests?

Sure, the script below sets up a null_blk zoned and dm-crypt on top of it.

--- start ---
# create zoned null_blk device as /dev/nullb0
rmmod null_blk
modprobe null_blk nr_devices=0
cd /sys/kernel/config/nullb
mkdir nullb0
cd nullb0
echo 1 > zoned
echo 1 > memory_backed
echo 1 > power

# set up dm-crypt on /dev/nullb0
KEY_FILE=/tmp/dmckey
dd if=/dev/random of="${KEY_FILE}" bs=1 count=512 > /dev/null 2>&1
cryptsetup open --batch-mode --type plain --key-file "${KEY_FILE}" \
	   /dev/nullb0 dmctest
--- end ---

Maybe no need to mention but I used blktests config as follows. With these set
up, I confirmed that block group and zbd group test cases run without failures.

--- start ---
TEST_DEVS=(/dev/mapper/dmctest)
DEVICE_ONLY=1
--- end ---

FYI, two commands below clean up the device.

# dmsetup remove dmctest
# rmdir /sys/kernel/config/nullb/nullb0

-- 
Best Regards,
Shin'ichiro Kawasaki