Commit 371420e2 authored by Vladimir Sementsov-Ogievskiy's avatar Vladimir Sementsov-Ogievskiy Committed by Kevin Wolf
Browse files

block: introduce byte-based io helpers 



Signed-off-by: default avatarVladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: default avatarStefano Garzarella <sgarzare@redhat.com>
Signed-off-by: default avatarKevin Wolf <kwolf@redhat.com>
parent e1f4a37a

include/block/block_int.h

+16 −0
Original line number Diff line number Diff line
@@ -925,6 +925,22 @@ int coroutine_fn bdrv_co_pwritev(BdrvChild *child, 
    int64_t offset, unsigned int bytes, QEMUIOVector *qiov,

    BdrvRequestFlags flags);



static inline int coroutine_fn bdrv_co_pread(BdrvChild *child,

    int64_t offset, unsigned int bytes, void *buf, BdrvRequestFlags flags)

{

    QEMUIOVector qiov = QEMU_IOVEC_INIT_BUF(qiov, buf, bytes);



    return bdrv_co_preadv(child, offset, bytes, &qiov, flags);

}



static inline int coroutine_fn bdrv_co_pwrite(BdrvChild *child,

    int64_t offset, unsigned int bytes, void *buf, BdrvRequestFlags flags)

{

    QEMUIOVector qiov = QEMU_IOVEC_INIT_BUF(qiov, buf, bytes);



    return bdrv_co_pwritev(child, offset, bytes, &qiov, flags);

}



extern unsigned int bdrv_drain_all_count;

void bdrv_apply_subtree_drain(BdrvChild *child, BlockDriverState *new_parent);

void bdrv_unapply_subtree_drain(BdrvChild *child, BlockDriverState *old_parent);

include/sysemu/block-backend.h

+19 −0
Original line number Diff line number Diff line
@@ -124,6 +124,25 @@ int coroutine_fn blk_co_preadv(BlockBackend *blk, int64_t offset, 
int coroutine_fn blk_co_pwritev(BlockBackend *blk, int64_t offset,

                               unsigned int bytes, QEMUIOVector *qiov,

                               BdrvRequestFlags flags);



static inline int coroutine_fn blk_co_pread(BlockBackend *blk, int64_t offset,

                                            unsigned int bytes, void *buf,

                                            BdrvRequestFlags flags)

{

    QEMUIOVector qiov = QEMU_IOVEC_INIT_BUF(qiov, buf, bytes);



    return blk_co_preadv(blk, offset, bytes, &qiov, flags);

}



static inline int coroutine_fn blk_co_pwrite(BlockBackend *blk, int64_t offset,

                                             unsigned int bytes, void *buf,

                                             BdrvRequestFlags flags)

{

    QEMUIOVector qiov = QEMU_IOVEC_INIT_BUF(qiov, buf, bytes);



    return blk_co_pwritev(blk, offset, bytes, &qiov, flags);

}



int blk_pwrite_zeroes(BlockBackend *blk, int64_t offset,

                      int bytes, BdrvRequestFlags flags);

BlockAIOCB *blk_aio_pwrite_zeroes(BlockBackend *blk, int64_t offset,