Commit b5679fa4 authored by Fam Zheng's avatar Fam Zheng Committed by Stefan Hajnoczi
Browse files

block-backend: Add blk_co_copy_range 



It's a BlockBackend wrapper of the BDS interface.

Signed-off-by: default avatarFam Zheng <famz@redhat.com>
Reviewed-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
Message-id: 20180601092648.24614-10-famz@redhat.com
Signed-off-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
parent 604dfaaa

block/block-backend.c

+18 −0
Original line number Diff line number Diff line
@@ -2211,3 +2211,21 @@ void blk_unregister_buf(BlockBackend *blk, void *host) 
{

    bdrv_unregister_buf(blk_bs(blk), host);

}



int coroutine_fn blk_co_copy_range(BlockBackend *blk_in, int64_t off_in,

                                   BlockBackend *blk_out, int64_t off_out,

                                   int bytes, BdrvRequestFlags flags)

{

    int r;

    r = blk_check_byte_request(blk_in, off_in, bytes);

    if (r) {

        return r;

    }

    r = blk_check_byte_request(blk_out, off_out, bytes);

    if (r) {

        return r;

    }

    return bdrv_co_copy_range(blk_in->root, off_in,

                              blk_out->root, off_out,

                              bytes, flags);

}

include/sysemu/block-backend.h

+4 −0
Original line number Diff line number Diff line
@@ -232,4 +232,8 @@ void blk_set_force_allow_inactivate(BlockBackend *blk); 
void blk_register_buf(BlockBackend *blk, void *host, size_t size);

void blk_unregister_buf(BlockBackend *blk, void *host);



int coroutine_fn blk_co_copy_range(BlockBackend *blk_in, int64_t off_in,

                                   BlockBackend *blk_out, int64_t off_out,

                                   int bytes, BdrvRequestFlags flags);



#endif