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dm raid: add comments and fix typos 

Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Heinz Mauelshagen 2016-06-24 01:03:19 +02:00 committed by Mike Snitzer
parent fbe6365bb4
commit 2527b56e0d
1 changed files with 13 additions and 7 deletions
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20
drivers/md/dm-raid.c
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@ -1618,7 +1618,6 @@ static int rs_check_takeover(struct raid_set *rs)
/* raid1 -> raid10 */
if (mddev->new_level == 10)
return 0;
break;
case 4:
@ -2424,8 +2423,8 @@ static int rs_adjust_data_offsets(struct raid_set *rs)
* data is at offset rs->data_offset != 0 and
* free space is at begin of each component LV
*
* - after reshape: data is at offset 0 if i was at offset != 0
* of at offset != 0 if it was at offset 0
* - after reshape: data is at offset 0 if it was at offset != 0
* or at offset != 0 if it was at offset 0
* on each component LV
*
*/
@ -2731,6 +2730,12 @@ static int raid_ctr(struct dm_target *ti, unsigned argc, char **argv)
rs->md.sync_super = super_sync;
/*
* Calculate ctr requested array and device sizes to allow
* for superblock analysis needing device sizes defined.
*
* Any existing superblock will overwrite the array and device sizes
*/
r = rs_set_dev_and_array_sectors(rs, false);
if (r)
return r;
@ -2781,8 +2786,9 @@ static int raid_ctr(struct dm_target *ti, unsigned argc, char **argv)
}
/*
* If a takeover is needed, just set the level to
* the new requested one and allow the raid set to run.
* If a takeover is needed, userspace sets any additional
* devices to rebuild, so just set the level to the new
* requested one and allow the raid set to run
*/
r = rs_check_takeover(rs);
if (r)
@ -2845,7 +2851,7 @@ static int raid_ctr(struct dm_target *ti, unsigned argc, char **argv)
}
if (rs->md.raid_disks < rs->raid_disks)
set_bit(MD_ARRAY_FIRST_USE, &rs->md.flags);
set_bit(MD_ARRAY_FIRST_USE, &mddev->flags);
rs_set_cur(rs);
rs_setup_recovery(rs, MaxSector);
@ -2935,7 +2941,7 @@ static int raid_map(struct dm_target *ti, struct bio *bio)
* mddev->array_sectors will differ during the process
* (ti->len > mddev->array_sectors), so we have to requeue
* bios with addresses > mddev->array_sectors here or
* or there will occur accesses past EOD of the component
* there will occur accesses past EOD of the component
* data images thus erroring the raid set.
*/
if (unlikely(bio_end_sector(bio) > mddev->array_sectors))