[lvm-devel] LVM2 ./WHATS_NEW lib/metadata/raid_manip.c
jbrassow at sourceware.org
jbrassow at sourceware.org
Wed Apr 11 01:23:30 UTC 2012
CVSROOT: /cvs/lvm2
Module name: LVM2
Changes by: jbrassow at sourceware.org 2012-04-11 01:23:29
Modified files:
. : WHATS_NEW
lib/metadata : raid_manip.c
Log message:
RAID LVs could not handle a down-convert if a device other than the last one
in the array was specified for removal. This change addresses that (bz806111).
Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/WHATS_NEW.diff?cvsroot=lvm2&r1=1.2376&r2=1.2377
http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/lib/metadata/raid_manip.c.diff?cvsroot=lvm2&r1=1.25&r2=1.26
--- LVM2/WHATS_NEW 2012/04/10 23:34:41 1.2376
+++ LVM2/WHATS_NEW 2012/04/11 01:23:29 1.2377
@@ -1,5 +1,6 @@
Version 2.02.96 -
================================
+ Fix problems when specifying PVs during RAID down-converts.
Fix ability to handle failures in mirrored log (regression intro 2.02.89).
Fix unlocking volume group in vgreduce in error path.
Exit immediately if LISTEN_PID env var incorrect during systemd handover.
--- LVM2/lib/metadata/raid_manip.c 2012/03/15 20:00:54 1.25
+++ LVM2/lib/metadata/raid_manip.c 2012/04/11 01:23:29 1.26
@@ -975,6 +975,8 @@
static int _raid_remove_images(struct logical_volume *lv,
uint32_t new_count, struct dm_list *pvs)
{
+ uint32_t s;
+ struct lv_segment *seg;
struct dm_list removal_list;
struct lv_list *lvl;
@@ -1024,9 +1026,21 @@
}
/*
- * Resume original LV
- * This also resumes all other sub-LVs
+ * Resume the remaining LVs
+ * We must start by resuming the sub-LVs first (which would
+ * otherwise be handled automatically) because the shifting
+ * of positions could otherwise cause name collisions. For
+ * example, if position 0 of a 3-way array is removed, position
+ * 1 and 2 must be shifted and renamed 0 and 1. If position 2
+ * tries to rename first, it will collide with the existing
+ * position 1.
*/
+ seg = first_seg(lv);
+ for (s = 0; (new_count > 1) && (s < seg->area_count); s++) {
+ if (!resume_lv(lv->vg->cmd, seg_lv(seg, s)) ||
+ !resume_lv(lv->vg->cmd, seg_metalv(seg, s)))
+ return_0;
+ }
if (!resume_lv(lv->vg->cmd, lv)) {
log_error("Failed to resume %s/%s after committing changes",
lv->vg->name, lv->name);
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