dm raid: fix rebuild and catch bogus sync/resync flags

Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

1 files changed, 16 insertions, 3 deletions

diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c
index 2fb5a9bff1bb..14b3d93e84cb 100644
--- a/drivers/md/dm-raid.c
+++ b/drivers/md/dm-raid.c
@@ -1312,6 +1312,13 @@ static int parse_raid_params(struct raid_set *rs, struct dm_arg_set *as,
                 return -EINVAL;
         }
 
+        if (test_bit(__CTR_FLAG_REBUILD, &rs->ctr_flags) &&
+            (test_bit(__CTR_FLAG_SYNC, &rs->ctr_flags) ||
+             test_bit(__CTR_FLAG_NOSYNC, &rs->ctr_flags))) {
+                rs->ti->error = "sync/nosync and rebuild are mutually exclusive";
+                return -EINVAL;
+        }
+
         if (write_mostly >= rs->md.raid_disks) {
                 rs->ti->error = "Can't set all raid1 devices to write_mostly";
                 return -EINVAL;
@@ -2776,7 +2783,9 @@ static int raid_ctr(struct dm_target *ti, unsigned argc, char **argv)
         } else if (rs_is_recovering(rs) || rs_is_reshaping(rs)) {
                 /* Have to reject size change request during recovery/reshape */
                 if (calculated_dev_sectors != rs->dev[0].rdev.sectors) {
-                        ti->error = "Can't resize a recovering/reshaping raid set";
+                        ti->error = rs_is_recovering(rs) ?
+                                    "Can't resize a recovering raid set" :
+                                    "Can't resize a reshaping raid set";
                         r = -EPERM;
                         goto bad;
                 }
@@ -2863,8 +2872,12 @@ static int raid_ctr(struct dm_target *ti, unsigned argc, char **argv)
                 rs_setup_recovery(rs, MaxSector);
         } else {
                 rs_set_cur(rs);
-                rs_setup_recovery(rs, test_bit(__CTR_FLAG_SYNC, &rs->ctr_flags) ?
-                                      0 : calculated_dev_sectors);
+                if (test_bit(__CTR_FLAG_REBUILD, &rs->ctr_flags)) {
+                        rs_setup_recovery(rs, MaxSector);
+                        set_bit(RT_FLAG_UPDATE_SBS, &rs->runtime_flags);
+                } else
+                        rs_setup_recovery(rs, test_bit(__CTR_FLAG_SYNC, &rs->ctr_flags) ?
+                                              0 : calculated_dev_sectors);
         }
 
         /* If constructor requested it, change data and new_data offsets */