btrfs: fix devs_max constraints for raid1c3 and raid1c4

The value 0 for devs_max means to spread the allocated chunks over all
available devices, eg. stripe for RAID0 or RAID5. This got mistakenly
copied to the RAID1C3/4 profiles. The intention is to have exactly 3 and
4 copies respectively.

Fixes: 47e6f7423b91 ("btrfs: add support for 3-copy replication (raid1c3)")
Fixes: 8d6fac0087e5 ("btrfs: add support for 4-copy replication (raid1c4)")
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index d8e5560..a6d3f08 100644 (file)
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -61,7 +61,7 @@ const struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES] = {
        [BTRFS_RAID_RAID1C3] = {
                .sub_stripes    = 1,
                .dev_stripes    = 1,
-               .devs_max       = 0,
+               .devs_max       = 3,
                .devs_min       = 3,
                .tolerated_failures = 2,
                .devs_increment = 3,
@@ -73,7 +73,7 @@ const struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES] = {
        [BTRFS_RAID_RAID1C4] = {
                .sub_stripes    = 1,
                .dev_stripes    = 1,
-               .devs_max       = 0,
+               .devs_max       = 4,
                .devs_min       = 4,
                .tolerated_failures = 3,
                .devs_increment = 4,