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imsm: Update metadata for second array 

When second array reshape is about to start metadata should be updated
by mdmon in imsm_set_array_state().

Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
Adam Kwolek 2011-01-06 18:29:23 +11:00 committed by NeilBrown
parent 582496b2c2
commit 0e2d1a4e68
1 changed files with 68 additions and 0 deletions
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68
super-intel.c
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@ -4849,6 +4849,73 @@ static void handle_missing(struct intel_super *super, struct imsm_dev *dev)
static void imsm_set_disk(struct active_array *a, int n, int state);
static void imsm_progress_container_reshape(struct intel_super *super)
{
/* if no device has a migr_state, but some device has a
* different number of members than the previous device, start
* changing the number of devices in this device to match
* previous.
*/
struct imsm_super *mpb = super->anchor;
int prev_disks = -1;
int i;
for (i = 0; i < mpb->num_raid_devs; i++) {
struct imsm_dev *dev = get_imsm_dev(super, i);
struct imsm_map *map = get_imsm_map(dev, 0);
struct imsm_map *map2;
int prev_num_members;
int used_disks;
if (dev->vol.migr_state)
return;
if (prev_disks == -1)
prev_disks = map->num_members;
if (prev_disks == map->num_members)
continue;
/* OK, this array needs to enter reshape mode.
* i.e it needs a migr_state
*/
prev_num_members = map->num_members;
map->num_members = prev_disks;
dev->vol.migr_state = 1;
dev->vol.curr_migr_unit = 0;
dev->vol.migr_type = MIGR_GEN_MIGR;
for (i = prev_num_members;
i < map->num_members; i++)
set_imsm_ord_tbl_ent(map, i, i);
map2 = get_imsm_map(dev, 1);
/* Copy the current map */
memcpy(map2, map, sizeof_imsm_map(map));
map2->num_members = prev_num_members;
/* calculate new size
*/
used_disks = imsm_num_data_members(dev, 0);
if (used_disks) {
unsigned long long array_blocks;
array_blocks =
map->blocks_per_member
* used_disks;
/* round array size down to closest MB
*/
array_blocks = (array_blocks
>> SECT_PER_MB_SHIFT)
<< SECT_PER_MB_SHIFT;
dev->size_low =
__cpu_to_le32((__u32)array_blocks);
dev->size_high =
__cpu_to_le32(
(__u32)(array_blocks >> 32));
}
super->updates_pending++;
}
}
/* Handle dirty -> clean transititions, resync and reshape. Degraded and rebuild
* states are handled in imsm_set_disk() with one exception, when a
* resync is stopped due to a new failure this routine will set the
@ -4918,6 +4985,7 @@ static int imsm_set_array_state(struct active_array *a, int consistent)
* array size
*/
super->updates_pending++;
imsm_progress_container_reshape(super);
}
}
}