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  1. RHEL
  2. RHEL-8327

uncaching or splitcaching write cache volumes with raid+integrity cause 'multipathd[]: libdevmapper: ioctl/libdm-iface.c' failure messages

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      Description of problem:
      [root@grant-01 archive]# pvchange --addtag slow /dev/sdg1 /dev/sdb1
      Physical volume "/dev/sdb1" changed
      Physical volume "/dev/sdg1" changed
      2 physical volumes changed / 0 physical volumes not changed
      [root@grant-01 archive]# pvchange --addtag fast /dev/sdc1 /dev/sdd1
      Physical volume "/dev/sdc1" changed
      Physical volume "/dev/sdd1" changed
      2 physical volumes changed / 0 physical volumes not changed

      [root@grant-01 archive]# lvcreate --yes --type raid1 -m 1 -L 4G -n display_writecache writecache_sanity @slow
      Logical volume "display_writecache" created.
      [root@grant-01 archive]# lvconvert --yes --raidintegrity y writecache_sanity/display_writecache
      Using integrity block size 512 for unknown file system block size, logical block size 512, physical block size 4096.
      Logical volume writecache_sanity/display_writecache has added integrity.

      [root@grant-01 archive]# lvcreate --yes -L 4G -n pool writecache_sanity @fast
      Logical volume "pool" created.
      [root@grant-01 archive]# lvchange -an writecache_sanity/pool
      [root@grant-01 archive]# lvconvert --yes --type writecache --cachevol writecache_sanity/pool writecache_sanity/display_writecache
      Using writecache block size 4096 for unknown file system block size, logical block size 512, physical block size 4096.
      WARNING: unable to detect a file system block size on writecache_sanity/display_writecache
      WARNING: using a writecache block size larger than the file system block size may corrupt the file system.
      Logical volume writecache_sanity/display_writecache now has writecache.

      [root@grant-01 archive]# lvs -a -o +devices,segtype
      LV VG Attr LSize Pool Origin Data% Cpy%Sync Devices Type
      display_writecache writecache_sanity Cwi-a-C--- 4.00g [pool_cvol] [display_writecache_wcorig] 0.00 display_writecache_wcorig(0) writecache
      [display_writecache_wcorig] writecache_sanity rwi-aoC--- 4.00g 100.00 display_writecache_wcorig_rimage_0(0),display_writecache_wcorig_rimage_1(0) raid1
      [display_writecache_wcorig_rimage_0] writecache_sanity gwi-aor--- 4.00g [display_writecache_wcorig_rimage_0_iorig] 100.00 display_writecache_wcorig_rimage_0_iorig(0) integrity
      [display_writecache_wcorig_rimage_0_imeta] writecache_sanity ewi-ao---- 68.00m /dev/sdb1(1025) linear
      [display_writecache_wcorig_rimage_0_iorig] writecache_sanity wi-ao--- 4.00g /dev/sdb1(1) linear
      [display_writecache_wcorig_rimage_1] writecache_sanity gwi-aor--- 4.00g [display_writecache_wcorig_rimage_1_iorig] 100.00 display_writecache_wcorig_rimage_1_iorig(0) integrity
      [display_writecache_wcorig_rimage_1_imeta] writecache_sanity ewi-ao---- 68.00m /dev/sdg1(1025) linear
      [display_writecache_wcorig_rimage_1_iorig] writecache_sanity wi-ao--- 4.00g /dev/sdg1(1) linear
      [display_writecache_wcorig_rmeta_0] writecache_sanity ewi-aor--- 4.00m /dev/sdb1(0) linear
      [display_writecache_wcorig_rmeta_1] writecache_sanity ewi-aor--- 4.00m /dev/sdg1(0) linear
      [pool_cvol] writecache_sanity Cwi-aoC--- 4.00g /dev/sdc1(0) linear

      [root@grant-01 archive]# lvconvert --yes --uncache writecache_sanity/display_writecache
      Detaching writecache already clean.
      Logical volume writecache_sanity/display_writecache writecache has been detached.
      Logical volume "pool" successfully removed.

      May 4 18:14:14 grant-01 dmeventd[380652]: No longer monitoring RAID device writecache_sanity-display_writecache for events.
      May 4 18:14:14 grant-01 dmeventd[380652]: Monitoring RAID device writecache_sanity-display_writecache_wcorig for events.
      May 4 18:14:39 grant-01 kernel: md/raid1:mdX: active with 2 out of 2 mirrors
      May 4 18:14:39 grant-01 dmeventd[380652]: No longer monitoring RAID device writecache_sanity-display_writecache_wcorig for events.
      May 4 18:14:39 grant-01 multipathd[1389]: libdevmapper: ioctl/libdm-iface.c(1987): device-mapper: table ioctl on writecache_sanity-display_writecache_wcorig_rimage_0 failed: No such device or address
      May 4 18:14:39 grant-01 multipathd[1389]: libdevmapper: ioctl/libdm-iface.c(1987): device-mapper: table ioctl on writecache_sanity-display_writecache_wcorig_rimage_0_iorig failed: No such device or address
      May 4 18:14:39 grant-01 multipathd[1389]: libdevmapper: ioctl/libdm-iface.c(1987): device-mapper: table ioctl on writecache_sanity-display_writecache_wcorig_rimage_1 failed: No such device or address
      May 4 18:14:39 grant-01 multipathd[1389]: libdevmapper: ioctl/libdm-iface.c(1987): device-mapper: table ioctl on writecache_sanity-display_writecache_wcorig_rmeta_0 failed: No such device or address
      May 4 18:14:39 grant-01 multipathd[1389]: libdevmapper: ioctl/libdm-iface.c(1987): device-mapper: table ioctl on writecache_sanity-display_writecache_wcorig_rmeta_1 failed: No such device or address
      May 4 18:14:39 grant-01 dmeventd[380652]: Monitoring RAID device writecache_sanity-display_writecache for events.

      Version-Release number of selected component (if applicable):
      kernel-5.14.0-302.el9 BUILT: Thu Apr 20 11:48:37 AM CEST 2023
      lvm2-2.03.21-1.el9 BUILT: Fri Apr 21 02:33:33 PM CEST 2023
      lvm2-libs-2.03.21-1.el9 BUILT: Fri Apr 21 02:33:33 PM CEST 2023

      How reproducible:
      Everytime

              lvm-team lvm-team
              cmarthal@redhat.com Corey Marthaler
              lvm-team lvm-team
              Cluster QE Cluster QE
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                Created:
                Updated: