dm raid: fix table line argument order in status

Commit 3a1c1ef2f ("dm raid: enhance status interface and fixup
takeover/raid0") added new table line arguments and introduced an
ordering flaw.  The sequence of the raid10_copies and raid10_format
raid parameters got reversed which causes lvm2 userspace to fail by
falsely assuming a changed table line.

Sequence those 2 parameters as before so that old lvm2 can function
properly with new kernels by adjusting the table line output as
documented in Documentation/device-mapper/dm-raid.txt.

Also, add missing version 1.10.1 highlight to the documention.

Fixes: 3a1c1ef2f ("dm raid: enhance status interface and fixup takeover/raid0")
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

1 files changed, 32 insertions, 30 deletions

diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c
index f8564d63982f..e07185fca638 100644
--- a/drivers/md/dm-raid.c
+++ b/drivers/md/dm-raid.c
@@ -3382,38 +3382,28 @@ static void raid_status(struct dm_target *ti, status_type_t type,
                                   hweight32(rs->ctr_flags & CTR_FLAG_OPTIONS_NO_ARGS) +
                                   hweight32(rs->ctr_flags & CTR_FLAG_OPTIONS_ONE_ARG) * 2 +
                                   (test_bit(__CTR_FLAG_JOURNAL_DEV, &rs->ctr_flags) ? 2 : 0);
+
                 /* Emit table line */
+                /* This has to be in the documented order for userspace! */
                 DMEMIT("%s %u %u", rs->raid_type->name, raid_param_cnt, mddev->new_chunk_sectors);
-                if (test_bit(__CTR_FLAG_RAID10_FORMAT, &rs->ctr_flags))
-                        DMEMIT(" %s %s", dm_raid_arg_name_by_flag(CTR_FLAG_RAID10_FORMAT),
-                                         raid10_md_layout_to_format(mddev->layout));
-                if (test_bit(__CTR_FLAG_RAID10_COPIES, &rs->ctr_flags))
-                        DMEMIT(" %s %d", dm_raid_arg_name_by_flag(CTR_FLAG_RAID10_COPIES),
-                                         raid10_md_layout_to_copies(mddev->layout));
-                if (test_bit(__CTR_FLAG_NOSYNC, &rs->ctr_flags))
-                        DMEMIT(" %s", dm_raid_arg_name_by_flag(CTR_FLAG_NOSYNC));
                 if (test_bit(__CTR_FLAG_SYNC, &rs->ctr_flags))
                         DMEMIT(" %s", dm_raid_arg_name_by_flag(CTR_FLAG_SYNC));
-                if (test_bit(__CTR_FLAG_REGION_SIZE, &rs->ctr_flags))
-                        DMEMIT(" %s %llu", dm_raid_arg_name_by_flag(CTR_FLAG_REGION_SIZE),
-                                           (unsigned long long) to_sector(mddev->bitmap_info.chunksize));
-                if (test_bit(__CTR_FLAG_DATA_OFFSET, &rs->ctr_flags))
-                        DMEMIT(" %s %llu", dm_raid_arg_name_by_flag(CTR_FLAG_DATA_OFFSET),
-                                           (unsigned long long) rs->data_offset);
-                if (test_bit(__CTR_FLAG_DAEMON_SLEEP, &rs->ctr_flags))
-                        DMEMIT(" %s %lu", dm_raid_arg_name_by_flag(CTR_FLAG_DAEMON_SLEEP),
-                                          mddev->bitmap_info.daemon_sleep);
-                if (test_bit(__CTR_FLAG_DELTA_DISKS, &rs->ctr_flags))
-                        DMEMIT(" %s %d", dm_raid_arg_name_by_flag(CTR_FLAG_DELTA_DISKS),
-                                         max(rs->delta_disks, mddev->delta_disks));
-                if (test_bit(__CTR_FLAG_STRIPE_CACHE, &rs->ctr_flags))
-                        DMEMIT(" %s %d", dm_raid_arg_name_by_flag(CTR_FLAG_STRIPE_CACHE),
-                                         max_nr_stripes);
+                if (test_bit(__CTR_FLAG_NOSYNC, &rs->ctr_flags))
+                        DMEMIT(" %s", dm_raid_arg_name_by_flag(CTR_FLAG_NOSYNC));
                 if (rebuild_disks)
                         for (i = 0; i < rs->raid_disks; i++)
                                 if (test_bit(rs->dev[i].rdev.raid_disk, (void *) rs->rebuild_disks))
                                         DMEMIT(" %s %u", dm_raid_arg_name_by_flag(CTR_FLAG_REBUILD),
                                                          rs->dev[i].rdev.raid_disk);
+                if (test_bit(__CTR_FLAG_DAEMON_SLEEP, &rs->ctr_flags))
+                        DMEMIT(" %s %lu", dm_raid_arg_name_by_flag(CTR_FLAG_DAEMON_SLEEP),
+                                          mddev->bitmap_info.daemon_sleep);
+                if (test_bit(__CTR_FLAG_MIN_RECOVERY_RATE, &rs->ctr_flags))
+                        DMEMIT(" %s %d", dm_raid_arg_name_by_flag(CTR_FLAG_MIN_RECOVERY_RATE),
+                                         mddev->sync_speed_min);
+                if (test_bit(__CTR_FLAG_MAX_RECOVERY_RATE, &rs->ctr_flags))
+                        DMEMIT(" %s %d", dm_raid_arg_name_by_flag(CTR_FLAG_MAX_RECOVERY_RATE),
+                                         mddev->sync_speed_max);
                 if (write_mostly_params)
                         for (i = 0; i < rs->raid_disks; i++)
                                 if (test_bit(WriteMostly, &rs->dev[i].rdev.flags))
@@ -3422,12 +3412,24 @@ static void raid_status(struct dm_target *ti, status_type_t type,
                 if (test_bit(__CTR_FLAG_MAX_WRITE_BEHIND, &rs->ctr_flags))
                         DMEMIT(" %s %lu", dm_raid_arg_name_by_flag(CTR_FLAG_MAX_WRITE_BEHIND),
                                           mddev->bitmap_info.max_write_behind);
-                if (test_bit(__CTR_FLAG_MAX_RECOVERY_RATE, &rs->ctr_flags))
-                        DMEMIT(" %s %d", dm_raid_arg_name_by_flag(CTR_FLAG_MAX_RECOVERY_RATE),
-                                         mddev->sync_speed_max);
-                if (test_bit(__CTR_FLAG_MIN_RECOVERY_RATE, &rs->ctr_flags))
-                        DMEMIT(" %s %d", dm_raid_arg_name_by_flag(CTR_FLAG_MIN_RECOVERY_RATE),
-                                         mddev->sync_speed_min);
+                if (test_bit(__CTR_FLAG_STRIPE_CACHE, &rs->ctr_flags))
+                        DMEMIT(" %s %d", dm_raid_arg_name_by_flag(CTR_FLAG_STRIPE_CACHE),
+                                         max_nr_stripes);
+                if (test_bit(__CTR_FLAG_REGION_SIZE, &rs->ctr_flags))
+                        DMEMIT(" %s %llu", dm_raid_arg_name_by_flag(CTR_FLAG_REGION_SIZE),
+                                           (unsigned long long) to_sector(mddev->bitmap_info.chunksize));
+                if (test_bit(__CTR_FLAG_RAID10_COPIES, &rs->ctr_flags))
+                        DMEMIT(" %s %d", dm_raid_arg_name_by_flag(CTR_FLAG_RAID10_COPIES),
+                                         raid10_md_layout_to_copies(mddev->layout));
+                if (test_bit(__CTR_FLAG_RAID10_FORMAT, &rs->ctr_flags))
+                        DMEMIT(" %s %s", dm_raid_arg_name_by_flag(CTR_FLAG_RAID10_FORMAT),
+                                         raid10_md_layout_to_format(mddev->layout));
+                if (test_bit(__CTR_FLAG_DELTA_DISKS, &rs->ctr_flags))
+                        DMEMIT(" %s %d", dm_raid_arg_name_by_flag(CTR_FLAG_DELTA_DISKS),
+                                         max(rs->delta_disks, mddev->delta_disks));
+                if (test_bit(__CTR_FLAG_DATA_OFFSET, &rs->ctr_flags))
+                        DMEMIT(" %s %llu", dm_raid_arg_name_by_flag(CTR_FLAG_DATA_OFFSET),
+                                           (unsigned long long) rs->data_offset);
                 if (test_bit(__CTR_FLAG_JOURNAL_DEV, &rs->ctr_flags))
                         DMEMIT(" %s %s", dm_raid_arg_name_by_flag(CTR_FLAG_JOURNAL_DEV),
                                         __get_dev_name(rs->journal_dev.dev));
@@ -3791,7 +3793,7 @@ static void raid_resume(struct dm_target *ti)
 
 static struct target_type raid_target = {
         .name = "raid",
-        .version = {1, 10, 1},
+        .version = {1, 11, 0},
         .module = THIS_MODULE,
         .ctr = raid_ctr,
         .dtr = raid_dtr,