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raid: implement transient status check

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Take into acount reported state from 'raid' targets.
When raid leg is marked with 'D' - take it as missing leg.
This commit is contained in:
Zdenek Kabelac 2016-11-21 12:43:18 +01:00
parent 2315743dd3
commit 23809379ba
2 changed files with 58 additions and 0 deletions
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1
WHATS_NEW
View File

@ -1,5 +1,6 @@
Version 2.02.168 -
====================================
Implement transient status check for raid volumes.
Only log msg as debug if lvm2-lvmdbusd unit missing for D-Bus notification.
Missing stripe filler now could be also 'zero'.
lvconvert --repair accepts --interval and --background option.

57
lib/raid/raid.c
View File

@ -349,6 +349,62 @@ static int _raid_target_percent(void **target_state,
return 1;
}
static int _raid_transient_status(struct dm_pool *mem,
struct lv_segment *seg,
char *params)
{
int failed = 0, r = 0;
unsigned i;
struct lvinfo info;
struct logical_volume *lv;
struct dm_status_raid *sr;
log_debug("Raid transient status %s.", params);
if (!dm_get_status_raid(mem, params, &sr))
return_0;
if (sr->dev_count != seg->area_count) {
log_error("Active raid has a wrong number of raid images!");
log_error("Metadata says %u, kernel says %u.",
seg->area_count, sr->dev_count);
goto out;
}
if (seg->meta_areas)
for (i = 0; i < seg->area_count; ++i) {
lv = seg_metalv(seg, i);
if (!lv_info(lv->vg->cmd, lv, 0, &info, 0, 0)) {
log_error("Check for existence of raid meta %s failed.",
display_lvname(lv));
goto out;
}
}
for (i = 0; i < seg->area_count; ++i) {
lv = seg_lv(seg, i);
if (!lv_info(lv->vg->cmd, lv, 0, &info, 0, 0)) {
log_error("Check for existence of raid image %s failed.",
display_lvname(lv));
goto out;
}
if (sr->dev_health[i] == 'D') {
lv->status |= PARTIAL_LV;
++failed;
}
}
/* Update PARTIAL_LV flags across the VG */
if (failed)
vg_mark_partial_lvs(lv->vg, 0);
r = 1;
out:
dm_pool_free(mem, sr);
return r;
}
static int _raid_target_present(struct cmd_context *cmd,
const struct lv_segment *seg __attribute__((unused)),
unsigned *attributes)
@ -460,6 +516,7 @@ static struct segtype_handler _raid_ops = {
#ifdef DEVMAPPER_SUPPORT
.target_percent = _raid_target_percent,
.target_present = _raid_target_present,
.check_transient_status = _raid_transient_status,
.modules_needed = _raid_modules_needed,
# ifdef DMEVENTD
.target_monitored = _raid_target_monitored,