[LU-16873] LU-16655 fix doesn't update OI_Scrub with new magic

• Type: Bug
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.16.0, Lustre 2.15.4
• Affects Version/s: Lustre 2.15.3
• Severity: 3
• Assignee: Alexander Zarochentsev
• Reporter: Alexander Zarochentsev

Description

The fix for LU-16655 detects the format change correctly but does not write new oi scrub file magic , so new mount triggers the "oi files counter reset" again and again:

[root@devvm4 tests]# LCTL=/home/zam/work/git/lustre-wc-rel/lustre/utils/lctl
[root@devvm4 tests]# umount /mnt/lustre-mds1/
[root@devvm4 tests]# mount -t ldiskfs /dev/mapper/mds1_flakey /mnt/lustre-mds1/
[root@devvm4 tests]# dd if=$HOME/OI_scrub.v1 of=/mnt/lustre-mds1/OI_scrub seek=16 skip=16 bs=1 conv=notrunc
384+0 records in
384+0 records out
384 bytes copied, 0.00154305 s, 249 kB/s
[root@devvm4 tests]# echo -n -e '\x01\x00' | dd of=/mnt/lustre-mds1/OI_scrub bs=1 count=2 status=none seek=136 conv=notrunc 
[root@devvm4 tests]# umount /mnt/lustre-mds1/
[root@devvm4 tests]# mount -t lustre /dev/mapper/mds1_flakey /mnt/lustre-mds1/
[root@devvm4 tests]# $LCTL get_param *.*.oi_scrub | grep oi_files
oi_files: 64
oi_files: 64
oi_files: 64
[root@devvm4 tests]# 
[root@devvm4 tests]# dmesg  | grep LU-16655
[ 3325.250365] Lustre: 62237:0:(scrub.c:189:scrub_file_load()) lustre-MDT0000: reset scrub OI count for format change (LU-16655)
[root@devvm4 tests]# umount /mnt/lustre-mds1/
[root@devvm4 tests]# mount -t lustre /dev/mapper/mds1_flakey /mnt/lustre-mds1/
[root@devvm4 tests]# dmesg  | grep LU-16655
[ 3325.250365] Lustre: 62237:0:(scrub.c:189:scrub_file_load()) lustre-MDT0000: reset scrub OI count for format change (LU-16655)
[ 3344.469841] Lustre: 62344:0:(scrub.c:189:scrub_file_load()) lustre-MDT0000: reset scrub OI count for format change (LU-16655)
[root@devvm4 tests]# umount /mnt/lustre-mds1/
[root@devvm4 tests]# mount -t lustre /dev/mapper/mds1_flakey /mnt/lustre-mds1/
[root@devvm4 tests]# dmesg  | grep LU-16655
[ 3325.250365] Lustre: 62237:0:(scrub.c:189:scrub_file_load()) lustre-MDT0000: reset scrub OI count for format change (LU-16655)
[ 3344.469841] Lustre: 62344:0:(scrub.c:189:scrub_file_load()) lustre-MDT0000: reset scrub OI count for format change (LU-16655)
[root@devvm4 tests]# umount /mnt/lustre-mds1/
[root@devvm4 tests]# mount -t lustre /dev/mapper/mds1_flakey /mnt/lustre-mds1/
[root@devvm4 tests]# dmesg  | grep LU-16655
[ 3325.250365] Lustre: 62237:0:(scrub.c:189:scrub_file_load()) lustre-MDT0000: reset scrub OI count for format change (LU-16655)
[ 3344.469841] Lustre: 62344:0:(scrub.c:189:scrub_file_load()) lustre-MDT0000: reset scrub OI count for format change (LU-16655)
[ 3379.617818] Lustre: 62529:0:(scrub.c:189:scrub_file_load()) lustre-MDT0000: reset scrub OI count for format change (LU-16655)
[root@devvm4 tests]# umount /mnt/lustre-mds1/
[root@devvm4 tests]# mount -t lustre /dev/mapper/mds1_flakey /mnt/lustre-mds1/
[root@devvm4 tests]# dmesg  | grep LU-16655
[ 3325.250365] Lustre: 62237:0:(scrub.c:189:scrub_file_load()) lustre-MDT0000: reset scrub OI count for format change (LU-16655)
[ 3344.469841] Lustre: 62344:0:(scrub.c:189:scrub_file_load()) lustre-MDT0000: reset scrub OI count for format change (LU-16655)
[ 3379.617818] Lustre: 62529:0:(scrub.c:189:scrub_file_load()) lustre-MDT0000: reset scrub OI count for format change (LU-16655)
[ 3432.251449] Lustre: 62622:0:(scrub.c:189:scrub_file_load()) lustre-MDT0000: reset scrub OI count for format change (LU-16655)
[root@devvm4 tests]# 

Issue Links

• is related to: LU-16655 Files not accessible after 2.12 -> 2.14/2.15 upgrade