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dm raid: prohibit 'nosync' on new raid6 and reject resize during reshape 

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 00:32:58 +02:00 committed by Mike Snitzer
parent 4dff2f1e26
commit 2d92a3c2a4
1 changed files with 15 additions and 3 deletions
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18
drivers/md/dm-raid.c
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@ -2752,9 +2752,21 @@ static int raid_ctr(struct dm_target *ti, unsigned argc, char **argv)
if (test_bit(MD_ARRAY_FIRST_USE, &rs->md.flags)) {
set_bit(RT_FLAG_UPDATE_SBS, &rs->runtime_flags);
rs_set_new(rs);
} else if (rs_is_reshaping(rs))
; /* skip rs setup */
else if (rs_takeover_requested(rs)) {
/* A new raid6 set has to be recovered to ensure proper parity and Q-Syndrome */
if (rs_is_raid6(rs) &&
test_bit(__CTR_FLAG_NOSYNC, &rs->ctr_flags)) {
ti->error = "'nosync' not allowed for new raid6 set";
return -EINVAL;
}
rs_setup_recovery(rs, 0);
} else if (rs_is_reshaping(rs)) {
/* Have to reject size change request during reshape */
if (calculated_dev_sectors != rs->dev[0].rdev.sectors) {
ti->error = "Can't resize a reshaping raid set";
return -EPERM;
}
/* skip setup rs */
} else if (rs_takeover_requested(rs)) {
if (rs_is_reshaping(rs)) {
ti->error = "Can't takeover a reshaping raid set";
return -EPERM;