tests/virtio-blk: add test for WRITE_ZEROES command
If the WRITE_ZEROES feature is enabled, we check this command in the test_basic(). Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Acked-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Message-id: 20190221103314.58500-10-sgarzare@redhat.com Message-Id: <20190221103314.58500-10-sgarzare@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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@ -255,6 +255,68 @@ static void test_basic(QVirtioDevice *dev, QGuestAllocator *alloc,
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guest_free(alloc, req_addr);
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if (features & (1u << VIRTIO_BLK_F_WRITE_ZEROES)) {
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struct virtio_blk_discard_write_zeroes dwz_hdr;
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void *expected;
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/*
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* WRITE_ZEROES request on the same sector of previous test where
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* we wrote "TEST".
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*/
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req.type = VIRTIO_BLK_T_WRITE_ZEROES;
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req.data = (char *) &dwz_hdr;
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dwz_hdr.sector = 0;
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dwz_hdr.num_sectors = 1;
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dwz_hdr.flags = 0;
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virtio_blk_fix_dwz_hdr(dev, &dwz_hdr);
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req_addr = virtio_blk_request(alloc, dev, &req, sizeof(dwz_hdr));
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free_head = qvirtqueue_add(vq, req_addr, 16, false, true);
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qvirtqueue_add(vq, req_addr + 16, sizeof(dwz_hdr), false, true);
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qvirtqueue_add(vq, req_addr + 16 + sizeof(dwz_hdr), 1, true, false);
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qvirtqueue_kick(dev, vq, free_head);
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qvirtio_wait_used_elem(dev, vq, free_head, NULL,
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QVIRTIO_BLK_TIMEOUT_US);
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status = readb(req_addr + 16 + sizeof(dwz_hdr));
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g_assert_cmpint(status, ==, 0);
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guest_free(alloc, req_addr);
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/* Read request to check if the sector contains all zeroes */
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req.type = VIRTIO_BLK_T_IN;
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req.ioprio = 1;
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req.sector = 0;
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req.data = g_malloc0(512);
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req_addr = virtio_blk_request(alloc, dev, &req, 512);
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g_free(req.data);
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free_head = qvirtqueue_add(vq, req_addr, 16, false, true);
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qvirtqueue_add(vq, req_addr + 16, 512, true, true);
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qvirtqueue_add(vq, req_addr + 528, 1, true, false);
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qvirtqueue_kick(dev, vq, free_head);
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qvirtio_wait_used_elem(dev, vq, free_head, NULL,
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QVIRTIO_BLK_TIMEOUT_US);
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status = readb(req_addr + 528);
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g_assert_cmpint(status, ==, 0);
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data = g_malloc(512);
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expected = g_malloc0(512);
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memread(req_addr + 16, data, 512);
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g_assert_cmpmem(data, 512, expected, 512);
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g_free(expected);
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g_free(data);
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guest_free(alloc, req_addr);
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}
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if (features & (1u << VIRTIO_F_ANY_LAYOUT)) {
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/* Write and read with 2 descriptor layout */
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/* Write request */
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