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block/export: Fix incorrect length passed to vu_queue_push() 

Now the req->size is set to the correct value only
when handling VIRTIO_BLK_T_GET_ID request. This patch
fixes it.

Signed-off-by: Xie Yongji <xieyongji@bytedance.com>
Message-Id: <20220523084611.91-3-xieyongji@bytedance.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
master
Xie Yongji 2022-05-23 16:46:05 +08:00 committed by Kevin Wolf
parent ac1fc3a3a9
commit 8e7fd6f623
1 changed files with 2 additions and 3 deletions
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5
block/export/vhost-user-blk-server.c
View File

@ -60,8 +60,7 @@ static void vu_blk_req_complete(VuBlkReq *req)
{
VuDev *vu_dev = &req->server->vu_dev;
/* IO size with 1 extra status byte */
vu_queue_push(vu_dev, req->vq, &req->elem, req->size + 1);
vu_queue_push(vu_dev, req->vq, &req->elem, req->size);
vu_queue_notify(vu_dev, req->vq);
free(req);
@ -207,6 +206,7 @@ static void coroutine_fn vu_blk_virtio_process_req(void *opaque)
goto err;
}
req->size = iov_size(in_iov, in_num);
/* We always touch the last byte, so just see how big in_iov is. */
req->in = (void *)in_iov[in_num - 1].iov_base
+ in_iov[in_num - 1].iov_len
@ -267,7 +267,6 @@ static void coroutine_fn vu_blk_virtio_process_req(void *opaque)
VIRTIO_BLK_ID_BYTES);
snprintf(elem->in_sg[0].iov_base, size, "%s", "vhost_user_blk");
req->in->status = VIRTIO_BLK_S_OK;
req->size = elem->in_sg[0].iov_len;
break;
}
case VIRTIO_BLK_T_DISCARD: