[PATCH 1/3] btrfs: Introduce struct btrfs_io_geometry

[Nikolay Borisov <nborisov@suse.com>]

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
---
 fs/btrfs/volumes.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index a7121d72388f..7c1ddf35b7d4 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -23,6 +23,15 @@ struct btrfs_pending_bios {
 	struct bio *tail;
 };
 
+struct btrfs_io_geometry {
+	u64 len; /* remaining bytes in chunk */
+	u64 offset; /* offset of logical address in chunk */
+	u64 stripe_len; /* len of single io stripe */
+	u64 stripe_nr; /* number of stripe where address falls */
+	u64 stripe_offset; /* offset of stripe in chunk */
+	u64 raid56_stripe_offset; /* offset of raid56 stripe into the chunk */
+};
+
 /*
  * Use sequence counter to get consistent device stat data on
  * 32-bit processors.
-- 
2.17.1