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bh=lgtPA01RUNgHlkKTIvcWt2T+4Qe1IRlbp49TuuOEeM4=; b=NHvg7dq1qRzj1WqaDygSoQiGKvQOAVPMXoW6NSueU40RFYF5rP198YIw+BqRrpETH5dXxl Wwi46XpZWlkI/W0ZJXBuElLEE1iG0JSOdthX7mP98TY7SDiAszIdAFupN1IM2yIYxfEcsQ nOYmxJW3VQkl9SoO0JL8vw3GTYgTsVg= X-MC-Unique: Ejhhb_F4PVmFpudXv9ywTA-1 From: Stefan Hajnoczi To: qemu-devel@nongnu.org Subject: [PATCH 4/4] vhost-user-blk-test: test discard/write zeroes invalid inputs Date: Tue, 9 Mar 2021 09:41:06 +0000 Message-Id: <20210309094106.196911-5-stefanha@redhat.com> In-Reply-To: <20210309094106.196911-1-stefanha@redhat.com> References: <20210309094106.196911-1-stefanha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=stefanha@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; 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charset="utf-8" Exercise input validation code paths in block/export/vhost-user-blk-server.c. Signed-off-by: Stefan Hajnoczi --- tests/qtest/vhost-user-blk-test.c | 124 ++++++++++++++++++++++++++++++ 1 file changed, 124 insertions(+) diff --git a/tests/qtest/vhost-user-blk-test.c b/tests/qtest/vhost-user-blk= -test.c index 61beee52d3..dc9d7a31ae 100644 --- a/tests/qtest/vhost-user-blk-test.c +++ b/tests/qtest/vhost-user-blk-test.c @@ -94,6 +94,124 @@ static uint64_t virtio_blk_request(QGuestAllocator *all= oc, QVirtioDevice *d, return addr; } =20 +static void test_invalid_discard_write_zeroes(QVirtioDevice *dev, + QGuestAllocator *alloc, + QTestState *qts, + QVirtQueue *vq, + uint32_t type) +{ + QVirtioBlkReq req; + struct virtio_blk_discard_write_zeroes dwz_hdr; + struct virtio_blk_discard_write_zeroes dwz_hdr2[2]; + uint64_t req_addr; + uint32_t free_head; + uint8_t status; + + /* More than one dwz is not supported */ + req.type =3D type; + req.data =3D (char *) dwz_hdr2; + dwz_hdr2[0].sector =3D 0; + dwz_hdr2[0].num_sectors =3D 1; + dwz_hdr2[0].flags =3D 0; + dwz_hdr2[1].sector =3D 1; + dwz_hdr2[1].num_sectors =3D 1; + dwz_hdr2[1].flags =3D 0; + + virtio_blk_fix_dwz_hdr(dev, &dwz_hdr2[0]); + virtio_blk_fix_dwz_hdr(dev, &dwz_hdr2[1]); + + req_addr =3D virtio_blk_request(alloc, dev, &req, sizeof(dwz_hdr2)); + + free_head =3D qvirtqueue_add(qts, vq, req_addr, 16, false, true); + qvirtqueue_add(qts, vq, req_addr + 16, sizeof(dwz_hdr2), false, true); + qvirtqueue_add(qts, vq, req_addr + 16 + sizeof(dwz_hdr2), 1, true, + false); + + qvirtqueue_kick(qts, dev, vq, free_head); + + qvirtio_wait_used_elem(qts, dev, vq, free_head, NULL, + QVIRTIO_BLK_TIMEOUT_US); + status =3D readb(req_addr + 16 + sizeof(dwz_hdr2)); + g_assert_cmpint(status, =3D=3D, VIRTIO_BLK_S_UNSUPP); + + guest_free(alloc, req_addr); + + /* num_sectors must be less than config->max_write_zeroes_sectors */ + req.type =3D type; + req.data =3D (char *) &dwz_hdr; + dwz_hdr.sector =3D 0; + dwz_hdr.num_sectors =3D 0xffffffff; + dwz_hdr.flags =3D 0; + + virtio_blk_fix_dwz_hdr(dev, &dwz_hdr); + + req_addr =3D virtio_blk_request(alloc, dev, &req, sizeof(dwz_hdr)); + + free_head =3D qvirtqueue_add(qts, vq, req_addr, 16, false, true); + qvirtqueue_add(qts, vq, req_addr + 16, sizeof(dwz_hdr), false, true); + qvirtqueue_add(qts, vq, req_addr + 16 + sizeof(dwz_hdr), 1, true, + false); + + qvirtqueue_kick(qts, dev, vq, free_head); + + qvirtio_wait_used_elem(qts, dev, vq, free_head, NULL, + QVIRTIO_BLK_TIMEOUT_US); + status =3D readb(req_addr + 16 + sizeof(dwz_hdr)); + g_assert_cmpint(status, =3D=3D, VIRTIO_BLK_S_IOERR); + + guest_free(alloc, req_addr); + + /* sector must be less than the device capacity */ + req.type =3D type; + req.data =3D (char *) &dwz_hdr; + dwz_hdr.sector =3D TEST_IMAGE_SIZE / 512 + 1; + dwz_hdr.num_sectors =3D 1; + dwz_hdr.flags =3D 0; + + virtio_blk_fix_dwz_hdr(dev, &dwz_hdr); + + req_addr =3D virtio_blk_request(alloc, dev, &req, sizeof(dwz_hdr)); + + free_head =3D qvirtqueue_add(qts, vq, req_addr, 16, false, true); + qvirtqueue_add(qts, vq, req_addr + 16, sizeof(dwz_hdr), false, true); + qvirtqueue_add(qts, vq, req_addr + 16 + sizeof(dwz_hdr), 1, true, + false); + + qvirtqueue_kick(qts, dev, vq, free_head); + + qvirtio_wait_used_elem(qts, dev, vq, free_head, NULL, + QVIRTIO_BLK_TIMEOUT_US); + status =3D readb(req_addr + 16 + sizeof(dwz_hdr)); + g_assert_cmpint(status, =3D=3D, VIRTIO_BLK_S_IOERR); + + guest_free(alloc, req_addr); + + /* reserved flag bits must be zero */ + req.type =3D type; + req.data =3D (char *) &dwz_hdr; + dwz_hdr.sector =3D 0; + dwz_hdr.num_sectors =3D 1; + dwz_hdr.flags =3D ~VIRTIO_BLK_WRITE_ZEROES_FLAG_UNMAP; + + virtio_blk_fix_dwz_hdr(dev, &dwz_hdr); + + req_addr =3D virtio_blk_request(alloc, dev, &req, sizeof(dwz_hdr)); + + free_head =3D qvirtqueue_add(qts, vq, req_addr, 16, false, true); + qvirtqueue_add(qts, vq, req_addr + 16, sizeof(dwz_hdr), false, true); + qvirtqueue_add(qts, vq, req_addr + 16 + sizeof(dwz_hdr), 1, true, + false); + + qvirtqueue_kick(qts, dev, vq, free_head); + + qvirtio_wait_used_elem(qts, dev, vq, free_head, NULL, + QVIRTIO_BLK_TIMEOUT_US); + status =3D readb(req_addr + 16 + sizeof(dwz_hdr)); + g_assert_cmpint(status, =3D=3D, VIRTIO_BLK_S_UNSUPP); + + guest_free(alloc, req_addr); +} + /* Returns the request virtqueue so the caller can perform further tests */ static QVirtQueue *test_basic(QVirtioDevice *dev, QGuestAllocator *alloc) { @@ -235,6 +353,9 @@ static QVirtQueue *test_basic(QVirtioDevice *dev, QGues= tAllocator *alloc) g_free(data); =20 guest_free(alloc, req_addr); + + test_invalid_discard_write_zeroes(dev, alloc, qts, vq, + VIRTIO_BLK_T_WRITE_ZEROES); } =20 if (features & (1u << VIRTIO_BLK_F_DISCARD)) { @@ -263,6 +384,9 @@ static QVirtQueue *test_basic(QVirtioDevice *dev, QGues= tAllocator *alloc) g_assert_cmpint(status, =3D=3D, 0); =20 guest_free(alloc, req_addr); + + test_invalid_discard_write_zeroes(dev, alloc, qts, vq, + VIRTIO_BLK_T_DISCARD); } =20 if (features & (1u << VIRTIO_F_ANY_LAYOUT)) { --=20 2.29.2