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imsm: Add metadata update type for general migration check-pointing 

There are 2 places for keeping checkpoint information:
- metadata (per volume information used during volume
  initialization and rebuilding).
- migration record (per container information used during
  migration/reshape)

During reshape both checkpoints has to contains the same information.
To do this mdadm will send metadta update with checkpoint information.

Note: Checkpoint information consistence is not critical. During general
      migration restart, information from migration record is used only.

Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
Adam Kwolek 2011-06-08 17:12:39 +10:00 committed by NeilBrown
parent 5b83bacff6
commit 2d40f3a132
1 changed files with 7 additions and 1 deletions
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8
super-intel.c
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@ -345,7 +345,8 @@ enum imsm_update_type {
update_add_remove_disk,
update_reshape_container_disks,
update_reshape_migration,
update_takeover
update_takeover,
update_general_migration_checkpoint,
};
struct imsm_update_activate_spare {
@ -398,6 +399,11 @@ struct imsm_update_reshape_migration {
int new_disks[1]; /* new_raid_disks - old_raid_disks makedev number */
};
struct imsm_update_general_migration_checkpoint {
enum imsm_update_type type;
__u32 curr_migr_unit;
};
struct disk_info {
__u8 serial[MAX_RAID_SERIAL_LEN];
};