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raid: check target version for shrink support

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Starting with dm-raid target version 1.9.0 shrinking of mapped devices is supported.
Check for support being present in lvresize and lvreduce.

Related: rhbz1394048
This commit is contained in:
Heinz Mauelshagen 2017-03-17 16:46:33 +01:00
parent 17a8f3d6f0
commit fec2ea76cf
3 changed files with 16 additions and 1 deletions
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13
lib/metadata/lv_manip.c
View File

@ -4773,6 +4773,19 @@ static int _lvresize_check(struct logical_volume *lv,
return 0;
}
if (lv_is_raid(lv) &&
lp->resize == LV_REDUCE) {
unsigned attrs;
const struct segment_type *segtype = first_seg(lv)->segtype;
if (!segtype->ops->target_present ||
!segtype->ops->target_present(lv->vg->cmd, NULL, &attrs) ||
!(attrs & RAID_FEATURE_SHRINK)) {
log_error("RAID module does not support shrinking.");
return 0;
}
}
if (lp->use_policies && !lv_is_cow(lv) && !lv_is_thin_pool(lv)) {
log_error("Policy-based resize is supported only for snapshot and thin pool volumes.");
return 0;

3
lib/metadata/segtype.h
View File

@ -286,7 +286,8 @@ struct segment_type *init_unknown_segtype(struct cmd_context *cmd,
#define RAID_FEATURE_RAID0 (1U << 1) /* version 1.7 */
#define RAID_FEATURE_RESHAPING (1U << 2) /* version 1.8 */
#define RAID_FEATURE_RAID4 (1U << 3) /* ! version 1.8 or 1.9.0 */
#define RAID_FEATURE_RESHAPE (1U << 4) /* version 1.10.1 */
#define RAID_FEATURE_SHRINK (1U << 4) /* version 1.9.0 */
#define RAID_FEATURE_RESHAPE (1U << 5) /* version 1.10.1 */
#ifdef RAID_INTERNAL
int init_raid_segtypes(struct cmd_context *cmd, struct segtype_library *seglib);

1
lib/raid/raid.c
View File

@ -473,6 +473,7 @@ static int _raid_target_present(struct cmd_context *cmd,
const struct raid_feature _features[] = {
{ 1, 3, 0, RAID_FEATURE_RAID10, SEG_TYPE_NAME_RAID10 },
{ 1, 7, 0, RAID_FEATURE_RAID0, SEG_TYPE_NAME_RAID0 },
{ 1, 9, 0, RAID_FEATURE_SHRINK, "shrinking" },
{ 1, 10, 1, RAID_FEATURE_RESHAPE, "reshaping" },
};