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imsm: FIX: Store checkpoint in per disk units 

While last_checkpoint is counter in per disk units, checkpoints
should be stored in the same manner.
Restoring from checkpoint should should recalculate checkpoint in to
array position (reshape_progress).

Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
Adam Kwolek 2011-03-14 18:17:53 +11:00 committed by NeilBrown
parent 0d51bfa20e
commit 6289d1e079
1 changed files with 6 additions and 2 deletions
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8
super-intel.c
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@ -1703,8 +1703,6 @@ static __u64 blocks_per_migr_unit(struct imsm_dev *dev)
migr_chunk = migr_strip_blocks_resync(dev);
disks = imsm_num_data_members(dev, 0);
blocks_per_unit = stripes_per_unit * migr_chunk * disks;
if (migr_type(dev) == MIGR_GEN_MIGR)
return blocks_per_unit;
stripe = __le32_to_cpu(map->blocks_per_strip) * disks;
segment = blocks_per_unit / stripe;
block_rel = blocks_per_unit - segment * stripe;
@ -1855,6 +1853,12 @@ static void getinfo_super_imsm_volume(struct supertype *st, struct mdinfo *info,
int used_disks;
info->reshape_progress = blocks_per_unit * units;
/* checkpoint is written per disks unit
* recalculate it to reshape position
*/
used_disks = imsm_num_data_members(dev, 0);
info->reshape_progress *= used_disks;
dprintf("IMSM: General Migration checkpoint : %llu "
"(%llu) -> read reshape progress : %llu\n",
units, blocks_per_unit, info->reshape_progress);