[PATCH v2 08/10] kvm tools: Hook virtio-blk completion to disk op completion

Sasha Levin
2011-11-01T16:08:23Z

This patch connects the completion processing in virtio-blk to the completion
notification coming from disk image.

Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
---
tools/kvm/virtio/blk.c | 10 ++++++----
1 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/tools/kvm/virtio/blk.c b/tools/kvm/virtio/blk.c
index be53111..5969d27 100644
--- a/tools/kvm/virtio/blk.c
+++ b/tools/kvm/virtio/blk.c
@@ -119,26 +119,26 @@ static void virtio_blk_do_io_request(struct kvm *kvm, struct blk_dev_req *req)
switch (req_hdr->type) {
case VIRTIO_BLK_T_IN:
block_cnt = disk_image__read(bdev->disk, req_hdr->sector, iov + 1,
- in + out - 2, NULL);
+ in + out - 2, req);
break;
case VIRTIO_BLK_T_OUT:
block_cnt = disk_image__write(bdev->disk, req_hdr->sector, iov + 1,
- in + out - 2, NULL);
+ in + out - 2, req);
break;
case VIRTIO_BLK_T_FLUSH:
block_cnt = disk_image__flush(bdev->disk);
+ virtio_blk_complete(req, block_cnt);
break;
case VIRTIO_BLK_T_GET_ID:
block_cnt = VIRTIO_BLK_ID_BYTES;
disk_image__get_serial(bdev->disk, (iov + 1)->iov_base, &block_cnt);
+ virtio_blk_complete(req, block_cnt);
break;
default:
pr_warning("request type %d", req_hdr->type);
block_cnt = -1;
break;
}
-
- virtio_blk_complete(req, block_cnt);
}

static void virtio_blk_do_io(struct kvm *kvm, struct virt_queue *vq, struct blk_dev *bdev)
@@ -261,6 +261,8 @@ void virtio_blk__init(struct kvm *kvm, struct disk_image *disk)
for (i = 0; i < ARRAY_SIZE(bdev->reqs); i++)
list_add(&bdev->reqs[i].list, &bdev->req_list);

+ disk_image__set_callback(bdev->disk, virtio_blk_complete);
+
if (compat_id != -1)
compat_id = compat__add_message("virtio-blk device was not detected",
"While you have requested a virtio-blk device, "
--
1.7.7.1