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virtio-blk: Make request completion function virtual 

virtio_blk_req_complete will call VirtIOBlock.complete_request() to push
data and notify guest. No functional change.

Later, this will allow dataplane to provide it's own (vring_) version.

Signed-off-by: Fam Zheng <famz@redhat.com>
Tested-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Fam Zheng 2014-06-17 14:32:06 +08:00 committed by Kevin Wolf
parent 13344f3a17
commit bf4bd461b4
2 changed files with 11 additions and 1 deletions
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9
hw/block/virtio-blk.c
View File

@ -44,7 +44,8 @@ static void virtio_blk_free_request(VirtIOBlockReq *req)
}
}
static void virtio_blk_req_complete(VirtIOBlockReq *req, int status)
static void virtio_blk_complete_request(VirtIOBlockReq *req,
unsigned char status)
{
VirtIOBlock *s = req->dev;
VirtIODevice *vdev = VIRTIO_DEVICE(s);
@ -56,6 +57,11 @@ static void virtio_blk_req_complete(VirtIOBlockReq *req, int status)
virtio_notify(vdev, s->vq);
}
static void virtio_blk_req_complete(VirtIOBlockReq *req, unsigned char status)
{
req->dev->complete_request(req, status);
}
static int virtio_blk_handle_rw_error(VirtIOBlockReq *req, int error,
bool is_read)
{
@ -740,6 +746,7 @@ static void virtio_blk_device_realize(DeviceState *dev, Error **errp)
s->sector_mask = (s->conf->logical_block_size / BDRV_SECTOR_SIZE) - 1;
s->vq = virtio_add_queue(vdev, 128, virtio_blk_handle_output);
s->complete_request = virtio_blk_complete_request;
#ifdef CONFIG_VIRTIO_BLK_DATA_PLANE
virtio_blk_data_plane_create(vdev, blk, &s->dataplane, &err);
if (err != NULL) {

3
include/hw/virtio/virtio-blk.h
View File

@ -117,6 +117,7 @@ struct VirtIOBlkConf
struct VirtIOBlockDataPlane;
struct VirtIOBlockReq;
typedef struct VirtIOBlock {
VirtIODevice parent_obj;
BlockDriverState *bs;
@ -128,6 +129,8 @@ typedef struct VirtIOBlock {
unsigned short sector_mask;
bool original_wce;
VMChangeStateEntry *change;
/* Function to push to vq and notify guest */
void (*complete_request)(struct VirtIOBlockReq *req, unsigned char status);
#ifdef CONFIG_VIRTIO_BLK_DATA_PLANE
Notifier migration_state_notifier;
struct VirtIOBlockDataPlane *dataplane;