1 /*
2  * Handler for virtio-blk I/O
3  *
4  * Copyright (C) 2022 Bytedance Inc. and/or its affiliates. All rights reserved.
5  *
6  * Author:
7  *   Xie Yongji <xieyongji@bytedance.com>
8  *
9  * This work is licensed under the terms of the GNU GPL, version 2 or
10  * later.  See the COPYING file in the top-level directory.
11  */
12 
13 #ifndef VIRTIO_BLK_HANDLER_H
14 #define VIRTIO_BLK_HANDLER_H
15 
16 #include "sysemu/block-backend.h"
17 
18 #define VIRTIO_BLK_SECTOR_BITS 9
19 #define VIRTIO_BLK_SECTOR_SIZE (1ULL << VIRTIO_BLK_SECTOR_BITS)
20 
21 #define VIRTIO_BLK_MAX_DISCARD_SECTORS 32768
22 #define VIRTIO_BLK_MAX_WRITE_ZEROES_SECTORS 32768
23 
24 typedef struct {
25     BlockBackend *blk;
26     char *serial;
27     uint32_t logical_block_size;
28     bool writable;
29 } VirtioBlkHandler;
30 
31 int coroutine_fn virtio_blk_process_req(VirtioBlkHandler *handler,
32                                         struct iovec *in_iov,
33                                         struct iovec *out_iov,
34                                         unsigned int in_num,
35                                         unsigned int out_num);
36 
37 #endif /* VIRTIO_BLK_HANDLER_H */
38