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Fix bug that caused RAID devices to be unable to activate if sub-LV was missing.

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Commit 02f6f4902fd90709f55e2e97e969ee28c2945c81 introduced a bug that caused
RAID devices to fail to activate if the device for a single sub-LV failed.
The special case of LVM mirror was handled, but not LVM RAID.
EXAMPLE:
[root@bp-01 ~]# devices vg
  LV            Copy%  Devices
  lv            100.00 lv_rimage_0(0),lv_rimage_1(0)
  [lv_rimage_0]        /dev/sde1(1)
  [lv_rimage_1]        /dev/sdh1(1)
  [lv_rmeta_0]         /dev/sde1(0)
  [lv_rmeta_1]         /dev/sdh1(0)
[root@bp-01 ~]# vgchange -an vg
  0 logical volume(s) in volume group "vg" now active
[root@bp-01 ~]# off.sh sdh
Turning off sdh
[root@bp-01 ~]# vgchange -ay vg --partial
  Partial mode. Incomplete logical volumes will be processed.
  Couldn't find device with uuid fbI0YO-GX7x-firU-Vy5o-vzwx-vAKZ-feRxfF.
  Cannot activate vg/lv_rimage_1: all segments missing.
  0 logical volume(s) in volume group "vg" now active

AFTER this patch:
[root@bp-01 ~]# vgchange -ay vg --partial
  Partial mode. Incomplete logical volumes will be processed.
  Couldn't find device with uuid fbI0YO-GX7x-firU-Vy5o-vzwx-vAKZ-feRxfF.
  1 logical volume(s) in volume group "vg" now active
[root@bp-01 ~]# devices vg
  Couldn't find device with uuid fbI0YO-GX7x-firU-Vy5o-vzwx-vAKZ-feRxfF.
  LV            Copy%  Devices
  lv            100.00 lv_rimage_0(0),lv_rimage_1(0)
  [lv_rimage_0]        /dev/sde1(1)
  [lv_rimage_1]        unknown device(1)
  [lv_rmeta_0]         /dev/sde1(0)
  [lv_rmeta_1]         unknown device(0)
[root@bp-01 ~]# dmsetup table vg-lv; dmsetup status vg-lv
0 1024000 raid raid1 3 0 region_size 1024 2 253:2 253:3 - -
0 1024000 raid raid1 2 AD 1024000/1024000

No WHATSNEW update necessary because this is an intrarelease fix.

 brassow
This commit is contained in:
Jonathan Earl Brassow 2012-02-13 17:59:21 +00:00
parent a693b8d2cb
commit a30832cedd
1 changed files with 4 additions and 1 deletions
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5
lib/activate/dev_manager.c
View File

@ -1449,11 +1449,14 @@ int add_areas_line(struct dev_manager *dm, struct lv_segment *seg,
}
/*
* Mirrors activate LVs replaced with error targets
* Mirrors activate LVs replaced with error targets and
* RAID can handle non-accessible sub-LVs.
*
* TODO: Can we eventually skip to activate such LVs ?
*/
if (!num_existing_areas &&
!strstr(seg->lv->name, "_rmeta_") &&
!strstr(seg->lv->name, "_rimage_") &&
!strstr(seg->lv->name, "_mimage_") &&
!((name = strstr(seg->lv->name, "_mlog")) && !name[5])) {
log_error("Cannot activate %s/%s: all segments missing.",