[Qemu-devel] [PATCH v2 10/37] block: Move guest_block_size into BlockBackend

[Max Reitz <mreitz@redhat.com>]

guest_block_size is a guest device property so it should be moved into
the interface between block layer and guest devices, which is the
BlockBackend.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
---
 block.c                   | 7 -------
 block/block-backend.c     | 7 +++++--
 include/block/block.h     | 1 -
 include/block/block_int.h | 3 ---
 4 files changed, 5 insertions(+), 13 deletions(-)

diff --git a/block.c b/block.c
index dafa4b7..7de03e5 100644
--- a/block.c
+++ b/block.c
@@ -967,7 +967,6 @@ static int bdrv_open_common(BlockDriverState *bs, BlockDriverState *file,
     }
 
     bs->open_flags = flags;
-    bs->guest_block_size = 512;
     bs->request_alignment = 512;
     bs->zero_beyond_eof = true;
     open_flags = bdrv_open_flags(bs, flags);
@@ -2040,7 +2039,6 @@ static void bdrv_move_feature_fields(BlockDriverState *bs_dest,
     /* move some fields that need to stay attached to the device */
 
     /* dev info */
-    bs_dest->guest_block_size   = bs_src->guest_block_size;
     bs_dest->copy_on_read       = bs_src->copy_on_read;
 
     bs_dest->enable_write_cache = bs_src->enable_write_cache;
@@ -5312,11 +5310,6 @@ BlockAIOCB *bdrv_aio_ioctl(BlockDriverState *bs,
     return NULL;
 }
 
-void bdrv_set_guest_block_size(BlockDriverState *bs, int align)
-{
-    bs->guest_block_size = align;
-}
-
 void *qemu_blockalign(BlockDriverState *bs, size_t size)
 {
     return qemu_memalign(bdrv_opt_mem_align(bs), size);
diff --git a/block/block-backend.c b/block/block-backend.c
index 9299697..bcea1f2 100644
--- a/block/block-backend.c
+++ b/block/block-backend.c
@@ -31,6 +31,9 @@ struct BlockBackend {
     /* TODO change to DeviceState when all users are qdevified */
     const BlockDevOps *dev_ops;
     void *dev_opaque;
+
+    /* the block size for which the guest device expects atomicity */
+    int guest_block_size;
 };
 
 typedef struct BlockBackendAIOCB {
@@ -334,7 +337,7 @@ void blk_detach_dev(BlockBackend *blk, void *dev)
     blk->dev = NULL;
     blk->dev_ops = NULL;
     blk->dev_opaque = NULL;
-    bdrv_set_guest_block_size(blk->bs, 512);
+    blk->guest_block_size = 512;
     blk_unref(blk);
 }
 
@@ -773,7 +776,7 @@ int blk_get_max_transfer_length(BlockBackend *blk)
 
 void blk_set_guest_block_size(BlockBackend *blk, int align)
 {
-    bdrv_set_guest_block_size(blk->bs, align);
+    blk->guest_block_size = align;
 }
 
 void *blk_blockalign(BlockBackend *blk, size_t size)
diff --git a/include/block/block.h b/include/block/block.h
index e0eec19..859e539 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -430,7 +430,6 @@ void bdrv_img_create(const char *filename, const char *fmt,
 /* Returns the alignment in bytes that is required so that no bounce buffer
  * is required throughout the stack */
 size_t bdrv_opt_mem_align(BlockDriverState *bs);
-void bdrv_set_guest_block_size(BlockDriverState *bs, int align);
 void *qemu_blockalign(BlockDriverState *bs, size_t size);
 void *qemu_blockalign0(BlockDriverState *bs, size_t size);
 void *qemu_try_blockalign(BlockDriverState *bs, size_t size);
diff --git a/include/block/block_int.h b/include/block/block_int.h
index 7dc0c91..4e7945c 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -375,9 +375,6 @@ struct BlockDriverState {
     /* Alignment requirement for offset/length of I/O requests */
     unsigned int request_alignment;
 
-    /* the block size for which the guest device expects atomicity */
-    int guest_block_size;
-
     /* do we need to tell the quest if we have a volatile write cache? */
     int enable_write_cache;
 
-- 
2.1.0