(Online Capacity Expansion for IMSM)
Mdadm configures greater disks number and starts reshape.
Mdmon learns it by reading mdstat information.
Mdmon calls grow_array() to be ready for new configuration update that will be send by mdadm and new disks maintain. grow_array() prepares active_array structure for those activities.
Signed-off-by: Adam Kwolek <adam.kwolek@xxxxxxxxx>
---
managemon.c | 25 ++++++++++++++++++++++++-
mdadm.h | 2 ++
2 files changed, 26 insertions(+), 1 deletions(-)
diff --git a/managemon.c b/managemon.c
index c279664..7288aa8 100644
--- a/managemon.c
+++ b/managemon.c
@@ -381,7 +381,6 @@ static void manage_member(struct mdstat_ent *mdstat,
* We do that whenever the monitor tells us too.
*/
// FIXME
- a->info.array.raid_disks = mdstat->raid_disks;
a->info.array.chunk_size = mdstat->chunk_size;
// MORE
@@ -393,7 +392,30 @@ static void manage_member(struct mdstat_ent *mdstat,
newa->info.array.level = level;
replace_array(a->container, a, newa);
a = newa;
+ } else {
+ /* not takeover fo maybe OLCE
+ * accept OLCE during reshape only
+ */
+ if ((a->info.array.raid_disks < mdstat->raid_disks) &&
+ (a->info.array.raid_disks > 0)) {
+ /* Yes - online capacity expanssion
+ */
+ if (a->container->ss->grow_array) {
+ newa = duplicate_aa(a);
+ if (newa) {
+ int to_add;
+ to_add = a->container->ss->grow_array(newa, mdstat->raid_disks);
+ if (to_add) {
+ replace_array(a->container, a, newa);
+ a = newa;
+ } else {
+ free_aa(newa);
+ }
+ }
+ }
+ }
}
+ a->info.array.raid_disks = mdstat->raid_disks;
if (a->check_degraded) {
struct metadata_update *updates = NULL; @@ -559,6 +581,7 @@ static void manage_new(struct mdstat_ent *mdstat,
new->info.state_fd = sysfs_open(new->devnum, NULL, "array_state");
new->resync_start_fd = sysfs_open(new->devnum, NULL, "resync_start");
new->metadata_fd = sysfs_open(new->devnum, NULL, "metadata_version");
+
dprintf("%s: inst: %d action: %d state: %d\n", __func__, atoi(inst),
new->action_fd, new->info.state_fd);
diff --git a/mdadm.h b/mdadm.h
index ba01e34..a846098 100644
--- a/mdadm.h
+++ b/mdadm.h
@@ -649,6 +649,8 @@ extern struct superswitch {
struct mdinfo *(*activate_spare)(struct active_array *a,
struct metadata_update **updates);
+ int (*grow_array)(struct active_array *a, int new_raid_disks);
+
int swapuuid; /* true if uuid is bigending rather than hostendian */
int external;
const char *name; /* canonical metadata name */
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