diff options
| -rw-r--r-- | block/block-backend.c | 7 | ||||
| -rw-r--r-- | include/sysemu/block-backend.h | 1 |
2 files changed, 8 insertions, 0 deletions
diff --git a/block/block-backend.c b/block/block-backend.c index edad02a0f2..f78e82a707 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -1764,6 +1764,13 @@ int blk_get_flags(BlockBackend *blk) } } +/* Returns the minimum request alignment, in bytes; guaranteed nonzero */ +uint32_t blk_get_request_alignment(BlockBackend *blk) +{ + BlockDriverState *bs = blk_bs(blk); + return bs ? bs->bl.request_alignment : BDRV_SECTOR_SIZE; +} + /* Returns the maximum transfer length, in bytes; guaranteed nonzero */ uint32_t blk_get_max_transfer(BlockBackend *blk) { diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h index e2066eb06b..3be05c2d68 100644 --- a/include/sysemu/block-backend.h +++ b/include/sysemu/block-backend.h @@ -177,6 +177,7 @@ bool blk_is_available(BlockBackend *blk); void blk_lock_medium(BlockBackend *blk, bool locked); void blk_eject(BlockBackend *blk, bool eject_flag); int blk_get_flags(BlockBackend *blk); +uint32_t blk_get_request_alignment(BlockBackend *blk); uint32_t blk_get_max_transfer(BlockBackend *blk); int blk_get_max_iov(BlockBackend *blk); void blk_set_guest_block_size(BlockBackend *blk, int align); |