btrfs: add mask for all RAID1 types

Preparatory patch for additional RAID1 profiles with more copies. The
mask will contain 3-copy and 4-copy, most of the checks for plain RAID1
work the same for the other profiles.
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/extent-tree.c

@@ -7873,7 +7873,7 @@ static noinline int find_free_extent(struct btrfs_fs_info *fs_info,
 		 */
 		if (!block_group_bits(block_group, flags)) {
 			u64 extra = BTRFS_BLOCK_GROUP_DUP |
-				BTRFS_BLOCK_GROUP_RAID1 |
+				BTRFS_BLOCK_GROUP_RAID1_MASK |
 				BTRFS_BLOCK_GROUP_RAID5 |
 				BTRFS_BLOCK_GROUP_RAID6 |
 				BTRFS_BLOCK_GROUP_RAID10;
@@ -9564,7 +9564,7 @@ static u64 update_block_group_flags(struct btrfs_fs_info *fs_info, u64 flags)
 
 	stripped = BTRFS_BLOCK_GROUP_RAID0 |
 		BTRFS_BLOCK_GROUP_RAID5 | BTRFS_BLOCK_GROUP_RAID6 |
-		BTRFS_BLOCK_GROUP_RAID1 | BTRFS_BLOCK_GROUP_RAID10;
+		BTRFS_BLOCK_GROUP_RAID1_MASK | BTRFS_BLOCK_GROUP_RAID10;
 
 	if (num_devices == 1) {
 		stripped |= BTRFS_BLOCK_GROUP_DUP;
@@ -9575,7 +9575,7 @@ static u64 update_block_group_flags(struct btrfs_fs_info *fs_info, u64 flags)
 			return stripped;
 
 		/* turn mirroring into duplication */
-		if (flags & (BTRFS_BLOCK_GROUP_RAID1 |
+		if (flags & (BTRFS_BLOCK_GROUP_RAID1_MASK |
 			     BTRFS_BLOCK_GROUP_RAID10))
 			return stripped | BTRFS_BLOCK_GROUP_DUP;
 	} else {
@@ -10445,7 +10445,7 @@ int btrfs_read_block_groups(struct btrfs_fs_info *info)
 	list_for_each_entry_rcu(space_info, &info->space_info, list) {
 		if (!(get_alloc_profile(info, space_info->flags) &
 		      (BTRFS_BLOCK_GROUP_RAID10 |
-		       BTRFS_BLOCK_GROUP_RAID1 |
+		       BTRFS_BLOCK_GROUP_RAID1_MASK |
 		       BTRFS_BLOCK_GROUP_RAID5 |
 		       BTRFS_BLOCK_GROUP_RAID6 |
 		       BTRFS_BLOCK_GROUP_DUP)))

fs/btrfs/scrub.c

@@ -3091,7 +3091,7 @@ static noinline_for_stack int scrub_stripe(struct scrub_ctx *sctx,
 		offset = map->stripe_len * (num / map->sub_stripes);
 		increment = map->stripe_len * factor;
 		mirror_num = num % map->sub_stripes + 1;
-	} else if (map->type & BTRFS_BLOCK_GROUP_RAID1) {
+	} else if (map->type & BTRFS_BLOCK_GROUP_RAID1_MASK) {
 		increment = map->stripe_len;
 		mirror_num = num % map->num_stripes + 1;
 	} else if (map->type & BTRFS_BLOCK_GROUP_DUP) {

fs/btrfs/volumes.c

@@ -5400,7 +5400,7 @@ int btrfs_num_copies(struct btrfs_fs_info *fs_info, u64 logical, u64 len)
 		return 1;
 
 	map = em->map_lookup;
-	if (map->type & (BTRFS_BLOCK_GROUP_DUP | BTRFS_BLOCK_GROUP_RAID1))
+	if (map->type & (BTRFS_BLOCK_GROUP_DUP | BTRFS_BLOCK_GROUP_RAID1_MASK))
 		ret = map->num_stripes;
 	else if (map->type & BTRFS_BLOCK_GROUP_RAID10)
 		ret = map->sub_stripes;
@@ -5474,7 +5474,7 @@ static int find_live_mirror(struct btrfs_fs_info *fs_info,
 	struct btrfs_device *srcdev;
 
 	ASSERT((map->type &
-		 (BTRFS_BLOCK_GROUP_RAID1 | BTRFS_BLOCK_GROUP_RAID10)));
+		 (BTRFS_BLOCK_GROUP_RAID1_MASK | BTRFS_BLOCK_GROUP_RAID10)));
 
 	if (map->type & BTRFS_BLOCK_GROUP_RAID10)
 		num_stripes = map->sub_stripes;
@@ -5663,7 +5663,7 @@ static int __btrfs_map_block_for_discard(struct btrfs_fs_info *fs_info,
 					      &remaining_stripes);
 		div_u64_rem(stripe_nr_end - 1, factor, &last_stripe);
 		last_stripe *= sub_stripes;
-	} else if (map->type & (BTRFS_BLOCK_GROUP_RAID1 |
+	} else if (map->type & (BTRFS_BLOCK_GROUP_RAID1_MASK |
 				BTRFS_BLOCK_GROUP_DUP)) {
 		num_stripes = map->num_stripes;
 	} else {
@@ -6035,7 +6035,7 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info,
 				&stripe_index);
 		if (!need_full_stripe(op))
 			mirror_num = 1;
-	} else if (map->type & BTRFS_BLOCK_GROUP_RAID1) {
+	} else if (map->type & BTRFS_BLOCK_GROUP_RAID1_MASK) {
 		if (need_full_stripe(op))
 			num_stripes = map->num_stripes;
 		else if (mirror_num)

include/uapi/linux/btrfs_tree.h

@@ -866,6 +866,8 @@ enum btrfs_raid_types {
 #define BTRFS_BLOCK_GROUP_RAID56_MASK	(BTRFS_BLOCK_GROUP_RAID5 |   \
 					 BTRFS_BLOCK_GROUP_RAID6)
 
+#define BTRFS_BLOCK_GROUP_RAID1_MASK	(BTRFS_BLOCK_GROUP_RAID1)
+
 /*
  * We need a bit for restriper to be able to tell when chunks of type
  * SINGLE are available.  This "extended" profile format is used in