Btrfs: Make raid_map array be inlined in btrfs_bio structure
It can make code more simple and clear, we need not care about
free bbio and raid_map together.
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index d6fe73c..fb0e8c3 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -307,6 +307,12 @@
int mirror_num;
int num_tgtdevs;
int *tgtdev_map;
+ /*
+ * logical block numbers for the start of each stripe
+ * The last one or two are p/q. These are sorted,
+ * so raid_map[0] is the start of our full stripe
+ */
+ u64 *raid_map;
struct btrfs_bio_stripe stripes[];
};
@@ -392,7 +398,8 @@
#define btrfs_bio_size(total_stripes, real_stripes) \
(sizeof(struct btrfs_bio) + \
(sizeof(struct btrfs_bio_stripe) * (total_stripes)) + \
- (sizeof(int) * (real_stripes)))
+ (sizeof(int) * (real_stripes)) + \
+ (sizeof(u64) * (real_stripes)))
int btrfs_map_block(struct btrfs_fs_info *fs_info, int rw,
u64 logical, u64 *length,
@@ -400,7 +407,7 @@
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 need_raid_map);
int btrfs_rmap_block(struct btrfs_mapping_tree *map_tree,
u64 chunk_start, u64 physical, u64 devid,
u64 **logical, int *naddrs, int *stripe_len);