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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: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Message-id: 20190221103314.58500-11-sgarzare@redhat.com
Message-Id: <20190221103314.58500-11-sgarzare@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Stefano Garzarella 2019-02-21 11:33:14 +01:00 committed by Stefan Hajnoczi
parent 06879094bb
commit 9a9f4b74fa
1 changed files with 27 additions and 0 deletions
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27
tests/virtio-blk-test.c
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@ -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 */