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raid0->raid10 takeover- process metadata update 

Implementation of raid0->raid10 takeover metadata update
at process_update level.
- We are using memory previously allocated in prepare_update to
  create two dummy disks will be inserted in the metadata and
  new imsm_dev structure with expanded disk order table.
- Update indexes in disk list
- Update metadata map
- Update disk order table

Signed-off-by: Krzysztof Wojcik <krzysztof.wojcik@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
Krzysztof Wojcik 2011-01-25 17:44:10 +11:00 committed by NeilBrown
parent abedf5fc46
commit 8ca6df95a2
1 changed files with 55 additions and 4 deletions
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59
super-intel.c
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@ -5769,12 +5769,15 @@ update_reshape_exit:
}
static int apply_takeover_update(struct imsm_update_takeover *u,
struct intel_super *super)
struct intel_super *super,
void ***space_list)
{
struct imsm_dev *dev = NULL;
struct intel_dev *dv;
struct imsm_dev *dev_new;
struct imsm_map *map;
struct dl *dm, *du;
struct intel_dev *dv;
int i;
for (dv = super->devlist; dv; dv = dv->next)
if (dv->index == (unsigned int)u->subarray) {
@ -5803,7 +5806,6 @@ static int apply_takeover_update(struct imsm_update_takeover *u,
dm->index = -1;
}
}
/* update map */
map->num_members = map->num_members / 2;
map->map_state = IMSM_T_STATE_NORMAL;
@ -5812,10 +5814,59 @@ static int apply_takeover_update(struct imsm_update_takeover *u,
map->failed_disk_num = -1;
}
if (u->direction == R0_TO_R10) {
void **space;
/* update slots in current disk list */
for (dm = super->disks; dm; dm = dm->next) {
if (dm->index >= 0)
dm->index *= 2;
}
/* create new *missing* disks */
for (i = 0; i < map->num_members; i++) {
space = *space_list;
if (!space)
continue;
*space_list = *space;
du = (void *)space;
memcpy(du, super->disks, sizeof(*du));
du->disk.status = FAILED_DISK;
du->disk.scsi_id = 0;
du->fd = -1;
du->minor = 0;
du->major = 0;
du->index = (i * 2) + 1;
sprintf((char *)du->disk.serial,
" MISSING_%d", du->index);
sprintf((char *)du->serial,
"MISSING_%d", du->index);
du->next = super->missing;
super->missing = du;
}
/* create new dev and map */
space = *space_list;
if (!space)
return 0;
*space_list = *space;
dev_new = (void *)space;
memcpy(dev_new, dev, sizeof(*dev));
/* update new map */
map = get_imsm_map(dev_new, 0);
map->failed_disk_num = map->num_members;
map->num_members = map->num_members * 2;
map->map_state = IMSM_T_STATE_NORMAL;
map->num_domains = 2;
map->raid_level = 1;
/* replace dev<->dev_new */
dv->dev = dev_new;
}
/* update disk order table */
for (du = super->disks; du; du = du->next)
if (du->index >= 0)
set_imsm_ord_tbl_ent(map, du->index, du->index);
for (du = super->missing; du; du = du->next)
if (du->index >= 0)
set_imsm_ord_tbl_ent(map, du->index,
du->index | IMSM_ORD_REBUILD);
return 1;
}
@ -5864,7 +5915,7 @@ static void imsm_process_update(struct supertype *st,
switch (type) {
case update_takeover: {
struct imsm_update_takeover *u = (void *)update->buf;
if (apply_takeover_update(u, super))
if (apply_takeover_update(u, super, &update->space_list))
super->updates_pending++;
break;
}