1 files changed, 11 insertions, 3 deletions

diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 637bcfadadb2..d6fe73c0f4a2 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -292,7 +292,7 @@ struct btrfs_bio_stripe {
 struct btrfs_bio;
 typedef void (btrfs_bio_end_io_t) (struct btrfs_bio *bio, int err);
 
-#define BTRFS_BIO_ORIG_BIO_SUBMITTED    0x1
+#define BTRFS_BIO_ORIG_BIO_SUBMITTED    (1 << 0)
 
 struct btrfs_bio {
         atomic_t stripes_pending;
@@ -305,6 +305,8 @@ struct btrfs_bio {
         int max_errors;
         int num_stripes;
         int mirror_num;
+        int num_tgtdevs;
+        int *tgtdev_map;
         struct btrfs_bio_stripe stripes[];
 };
 
@@ -387,12 +389,18 @@ struct btrfs_balance_control {
 int btrfs_account_dev_extents_size(struct btrfs_device *device, u64 start,
                                    u64 end, u64 *length);
 
-#define btrfs_bio_size(n) (sizeof(struct btrfs_bio) + \
-                            (sizeof(struct btrfs_bio_stripe) * (n)))
+#define btrfs_bio_size(total_stripes, real_stripes)             \
+        (sizeof(struct btrfs_bio) +                             \
+         (sizeof(struct btrfs_bio_stripe) * (total_stripes)) +  \
+         (sizeof(int) * (real_stripes)))
 
 int btrfs_map_block(struct btrfs_fs_info *fs_info, int rw,
                     u64 logical, u64 *length,
                     struct btrfs_bio **bbio_ret, int mirror_num);
+int btrfs_map_sblock(struct btrfs_fs_info *fs_info, int rw,
+                     u64 logical, u64 *length,
+                     struct btrfs_bio **bbio_ret, int mirror_num,
+                     u64 **raid_map_ret);
 int btrfs_rmap_block(struct btrfs_mapping_tree *map_tree,
                      u64 chunk_start, u64 physical, u64 devid,
                      u64 **logical, int *naddrs, int *stripe_len);