This is a note to let you know that I've just added the patch titled

dm mpath: fix passing integrity data

to the 4.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: dm-mpath-fix-passing-integrity-data.patch and it can be found in the queue-4.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From 8c5c147339d2e201108169327b1f99aa6d57d2cd Mon Sep 17 00:00:00 2001

From: Steffen Maier maier@linux.vnet.ibm.com Date: Wed, 14 Mar 2018 15:33:06 +0100 Subject: dm mpath: fix passing integrity data

From: Steffen Maier maier@linux.vnet.ibm.com

commit 8c5c147339d2e201108169327b1f99aa6d57d2cd upstream.

After v4.12 commit e2460f2a4bc7 ("dm: mark targets that pass integrity data"), dm-multipath, e.g. on DIF+DIX SCSI disk paths, does not support block integrity any more. So add it to the whitelist.

This is also a pre-requisite to use block integrity with other dm layer(s) on top of multipath, such as kpartx partitions (dm-linear) or LVM.

Also, bump target version to reflect this fix.

Fixes: e2460f2a4bc7 ("dm: mark targets that pass integrity data") Cc: stable@vger.kernel.org #4.12+ Bisected-by: Fedor Loshakov loshakov@linux.vnet.ibm.com Signed-off-by: Steffen Maier maier@linux.vnet.ibm.com Reviewed-by: Hannes Reinecke hare@suse.com Reviewed-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Mike Snitzer snitzer@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/md/dm-mpath.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/md/dm-mpath.c +++ b/drivers/md/dm-mpath.c @@ -1968,8 +1968,9 @@ static int multipath_busy(struct dm_targ *---------------------------------------------------------------*/ static struct target_type multipath_target = { .name = "multipath", - .version = {1, 12, 0}, - .features = DM_TARGET_SINGLETON | DM_TARGET_IMMUTABLE, + .version = {1, 13, 0}, + .features = DM_TARGET_SINGLETON | DM_TARGET_IMMUTABLE | + DM_TARGET_PASSES_INTEGRITY, .module = THIS_MODULE, .ctr = multipath_ctr, .dtr = multipath_dtr,

Patches currently in stable-queue which might be from maier@linux.vnet.ibm.com are

queue-4.15/dm-mpath-fix-passing-integrity-data.patch