Commit 9a9f4b74 authored by Stefano Garzarella's avatar Stefano Garzarella Committed by Stefan Hajnoczi
Browse files

tests/virtio-blk: add test for DISCARD command 



If the DISCARD feature is enabled, we try this command in the
test_basic(), checking only the status returned by the request.

Reviewed-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: default avatarStefano Garzarella <sgarzare@redhat.com>
Message-id: 20190221103314.58500-11-sgarzare@redhat.com
Message-Id: <20190221103314.58500-11-sgarzare@redhat.com>
Signed-off-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
parent 06879094

tests/virtio-blk-test.c

+27 −0
Original line number Diff line number Diff line
@@ -317,6 +317,33 @@ static void test_basic(QVirtioDevice *dev, QGuestAllocator *alloc, 
        guest_free(alloc, req_addr);

    }



    if (features & (1u << VIRTIO_BLK_F_DISCARD)) {

        struct virtio_blk_discard_write_zeroes dwz_hdr;



        req.type = VIRTIO_BLK_T_DISCARD;

        req.data = (char *) &dwz_hdr;

        dwz_hdr.sector = 0;

        dwz_hdr.num_sectors = 1;

        dwz_hdr.flags = 0;



        virtio_blk_fix_dwz_hdr(dev, &dwz_hdr);



        req_addr = virtio_blk_request(alloc, dev, &req, sizeof(dwz_hdr));



        free_head = qvirtqueue_add(vq, req_addr, 16, false, true);

        qvirtqueue_add(vq, req_addr + 16, sizeof(dwz_hdr), false, true);

        qvirtqueue_add(vq, req_addr + 16 + sizeof(dwz_hdr), 1, true, false);



        qvirtqueue_kick(dev, vq, free_head);



        qvirtio_wait_used_elem(dev, vq, free_head, NULL,

                               QVIRTIO_BLK_TIMEOUT_US);

        status = readb(req_addr + 16 + sizeof(dwz_hdr));

        g_assert_cmpint(status, ==, 0);



        guest_free(alloc, req_addr);

    }



    if (features & (1u << VIRTIO_F_ANY_LAYOUT)) {

        /* Write and read with 2 descriptor layout */

        /* Write request */