Introduce Virtio-loopback epsilon release:

Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.

Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9

1 files changed, 388 insertions, 0 deletions

diff --git a/tests/qtest/virtio-scsi-test.c b/tests/qtest/virtio-scsi-test.c
new file mode 100644
index 000000000..8ceb12aac
--- /dev/null
+++ b/tests/qtest/virtio-scsi-test.c
@@ -0,0 +1,388 @@
+/*
+ * QTest testcase for VirtIO SCSI
+ *
+ * Copyright (c) 2014 SUSE LINUX Products GmbH
+ * Copyright (c) 2015 Red Hat Inc.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "libqtest-single.h"
+#include "qemu/module.h"
+#include "scsi/constants.h"
+#include "libqos/libqos-pc.h"
+#include "libqos/libqos-spapr.h"
+#include "libqos/virtio.h"
+#include "libqos/virtio-pci.h"
+#include "standard-headers/linux/virtio_ids.h"
+#include "standard-headers/linux/virtio_pci.h"
+#include "standard-headers/linux/virtio_scsi.h"
+#include "libqos/virtio-scsi.h"
+#include "libqos/qgraph.h"
+
+#define PCI_SLOT                0x02
+#define PCI_FN                  0x00
+#define QVIRTIO_SCSI_TIMEOUT_US (1 * 1000 * 1000)
+
+#define MAX_NUM_QUEUES 64
+
+typedef struct {
+    QVirtioDevice *dev;
+    int num_queues;
+    QVirtQueue *vq[MAX_NUM_QUEUES + 2];
+} QVirtioSCSIQueues;
+
+static QGuestAllocator *alloc;
+
+static void qvirtio_scsi_pci_free(QVirtioSCSIQueues *vs)
+{
+    int i;
+
+    for (i = 0; i < vs->num_queues + 2; i++) {
+        qvirtqueue_cleanup(vs->dev->bus, vs->vq[i], alloc);
+    }
+    g_free(vs);
+}
+
+static uint64_t qvirtio_scsi_alloc(QVirtioSCSIQueues *vs, size_t alloc_size,
+                                   const void *data)
+{
+    uint64_t addr;
+
+    addr = guest_alloc(alloc, alloc_size);
+    if (data) {
+        memwrite(addr, data, alloc_size);
+    }
+
+    return addr;
+}
+
+static uint8_t virtio_scsi_do_command(QVirtioSCSIQueues *vs,
+                                      const uint8_t *cdb,
+                                      const uint8_t *data_in,
+                                      size_t data_in_len,
+                                      uint8_t *data_out, size_t data_out_len,
+                                      struct virtio_scsi_cmd_resp *resp_out)
+{
+    QVirtQueue *vq;
+    struct virtio_scsi_cmd_req req = { { 0 } };
+    struct virtio_scsi_cmd_resp resp = { .response = 0xff, .status = 0xff };
+    uint64_t req_addr, resp_addr, data_in_addr = 0, data_out_addr = 0;
+    uint8_t response;
+    uint32_t free_head;
+    QTestState *qts = global_qtest;
+
+    vq = vs->vq[2];
+
+    req.lun[0] = 1; /* Select LUN */
+    req.lun[1] = 1; /* Select target 1 */
+    memcpy(req.cdb, cdb, VIRTIO_SCSI_CDB_SIZE);
+
+    /* XXX: Fix endian if any multi-byte field in req/resp is used */
+
+    /* Add request header */
+    req_addr = qvirtio_scsi_alloc(vs, sizeof(req), &req);
+    free_head = qvirtqueue_add(qts, vq, req_addr, sizeof(req), false, true);
+
+    if (data_out_len) {
+        data_out_addr = qvirtio_scsi_alloc(vs, data_out_len, data_out);
+        qvirtqueue_add(qts, vq, data_out_addr, data_out_len, false, true);
+    }
+
+    /* Add response header */
+    resp_addr = qvirtio_scsi_alloc(vs, sizeof(resp), &resp);
+    qvirtqueue_add(qts, vq, resp_addr, sizeof(resp), true, !!data_in_len);
+
+    if (data_in_len) {
+        data_in_addr = qvirtio_scsi_alloc(vs, data_in_len, data_in);
+        qvirtqueue_add(qts, vq, data_in_addr, data_in_len, true, false);
+    }
+
+    qvirtqueue_kick(qts, vs->dev, vq, free_head);
+    qvirtio_wait_used_elem(qts, vs->dev, vq, free_head, NULL,
+                           QVIRTIO_SCSI_TIMEOUT_US);
+
+    response = readb(resp_addr +
+                     offsetof(struct virtio_scsi_cmd_resp, response));
+
+    if (resp_out) {
+        memread(resp_addr, resp_out, sizeof(*resp_out));
+    }
+
+    guest_free(alloc, req_addr);
+    guest_free(alloc, resp_addr);
+    guest_free(alloc, data_in_addr);
+    guest_free(alloc, data_out_addr);
+    return response;
+}
+
+static QVirtioSCSIQueues *qvirtio_scsi_init(QVirtioDevice *dev)
+{
+    QVirtioSCSIQueues *vs;
+    const uint8_t test_unit_ready_cdb[VIRTIO_SCSI_CDB_SIZE] = {};
+    struct virtio_scsi_cmd_resp resp;
+    uint64_t features;
+    int i;
+
+    vs = g_new0(QVirtioSCSIQueues, 1);
+    vs->dev = dev;
+
+    features = qvirtio_get_features(dev);
+    features &= ~(QVIRTIO_F_BAD_FEATURE | (1ull << VIRTIO_RING_F_EVENT_IDX));
+    qvirtio_set_features(dev, features);
+
+    vs->num_queues = qvirtio_config_readl(dev, 0);
+
+    g_assert_cmpint(vs->num_queues, <, MAX_NUM_QUEUES);
+
+    for (i = 0; i < vs->num_queues + 2; i++) {
+        vs->vq[i] = qvirtqueue_setup(dev, alloc, i);
+    }
+
+    qvirtio_set_driver_ok(dev);
+
+    /* Clear the POWER ON OCCURRED unit attention */
+    g_assert_cmpint(virtio_scsi_do_command(vs, test_unit_ready_cdb,
+                                           NULL, 0, NULL, 0, &resp),
+                    ==, 0);
+    g_assert_cmpint(resp.status, ==, CHECK_CONDITION);
+    g_assert_cmpint(resp.sense[0], ==, 0x70); /* Fixed format sense buffer */
+    g_assert_cmpint(resp.sense[2], ==, UNIT_ATTENTION);
+    g_assert_cmpint(resp.sense[12], ==, 0x29); /* POWER ON */
+    g_assert_cmpint(resp.sense[13], ==, 0x00);
+
+    return vs;
+}
+
+static void hotplug(void *obj, void *data, QGuestAllocator *alloc)
+{
+    QTestState *qts = global_qtest;
+
+    qtest_qmp_device_add(qts, "scsi-hd", "scsihd", "{'drive': 'drv1'}");
+    qtest_qmp_device_del(qts, "scsihd");
+}
+
+/* Test WRITE SAME with the lba not aligned */
+static void test_unaligned_write_same(void *obj, void *data,
+                                      QGuestAllocator *t_alloc)
+{
+    QVirtioSCSI *scsi = obj;
+    QVirtioSCSIQueues *vs;
+    uint8_t buf1[512] = { 0 };
+    uint8_t buf2[512] = { 1 };
+    const uint8_t write_same_cdb_1[VIRTIO_SCSI_CDB_SIZE] = {
+        0x41, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x02, 0x00
+    };
+    const uint8_t write_same_cdb_2[VIRTIO_SCSI_CDB_SIZE] = {
+        0x41, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x33, 0x00, 0x00
+    };
+    const uint8_t write_same_cdb_ndob[VIRTIO_SCSI_CDB_SIZE] = {
+        0x41, 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x33, 0x00, 0x00
+    };
+
+    alloc = t_alloc;
+    vs = qvirtio_scsi_init(scsi->vdev);
+
+    g_assert_cmphex(0, ==,
+        virtio_scsi_do_command(vs, write_same_cdb_1, NULL, 0, buf1, 512,
+                               NULL));
+
+    g_assert_cmphex(0, ==,
+        virtio_scsi_do_command(vs, write_same_cdb_2, NULL, 0, buf2, 512,
+                               NULL));
+
+    g_assert_cmphex(0, ==,
+        virtio_scsi_do_command(vs, write_same_cdb_ndob, NULL, 0, NULL, 0,
+                               NULL));
+
+    qvirtio_scsi_pci_free(vs);
+}
+
+/* Test UNMAP with a large LBA, issue #345 */
+static void test_unmap_large_lba(void *obj, void *data,
+                                      QGuestAllocator *t_alloc)
+{
+    QVirtioSCSI *scsi = obj;
+    QVirtioSCSIQueues *vs;
+    const uint8_t unmap[VIRTIO_SCSI_CDB_SIZE] = {
+        0x42, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x00
+    };
+
+    /*
+     * Default null-co device size is 2**30
+     * LBA 0x7fff is ~ 1/8 into device, with 4k blocks
+     * if check_lba_range incorrectly using 512 bytes, will trigger sense error
+     */
+    uint8_t unmap_params[0x18] = {
+        0x00, 0x16, /* unmap data length */
+        0x00, 0x10, /* unmap block descriptor data length */
+        0x00, 0x00, 0x00, 0x00, /* reserved */
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7f, 0xff, /* LBA */
+        0x00, 0x00, 0x03, 0xff, /* sector count */
+        0x00, 0x00, 0x00, 0x00, /* reserved */
+    };
+    struct virtio_scsi_cmd_resp resp;
+
+    alloc = t_alloc;
+    vs = qvirtio_scsi_init(scsi->vdev);
+
+    virtio_scsi_do_command(vs, unmap, NULL, 0, unmap_params,
+                           sizeof(unmap_params), &resp);
+    g_assert_cmphex(resp.response, ==, 0);
+    g_assert_cmphex(resp.status, !=, CHECK_CONDITION);
+
+    qvirtio_scsi_pci_free(vs);
+}
+
+static void test_write_to_cdrom(void *obj, void *data,
+                                QGuestAllocator *t_alloc)
+{
+    QVirtioSCSI *scsi = obj;
+    QVirtioSCSIQueues *vs;
+    uint8_t buf[2048] = { 0 };
+    const uint8_t write_cdb[VIRTIO_SCSI_CDB_SIZE] = {
+        /* WRITE(10) to LBA 0, transfer length 1 */
+        0x2a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00
+    };
+    struct virtio_scsi_cmd_resp resp;
+
+    alloc = t_alloc;
+    vs = qvirtio_scsi_init(scsi->vdev);
+
+    virtio_scsi_do_command(vs, write_cdb, NULL, 0, buf, 2048, &resp);
+    g_assert_cmphex(resp.response, ==, 0);
+    g_assert_cmphex(resp.status, ==, CHECK_CONDITION);
+    g_assert_cmphex(resp.sense[0], ==, 0x70);
+    g_assert_cmphex(resp.sense[2], ==, DATA_PROTECT);
+    g_assert_cmphex(resp.sense[12], ==, 0x27); /* WRITE PROTECTED */
+    g_assert_cmphex(resp.sense[13], ==, 0x00); /* WRITE PROTECTED */
+
+    qvirtio_scsi_pci_free(vs);
+}
+
+static void test_iothread_attach_node(void *obj, void *data,
+                                      QGuestAllocator *t_alloc)
+{
+    QVirtioSCSIPCI *scsi_pci = obj;
+    QVirtioSCSI *scsi = &scsi_pci->scsi;
+    QVirtioSCSIQueues *vs;
+    char tmp_path[] = "/tmp/qtest.XXXXXX";
+    int fd;
+    int ret;
+
+    uint8_t buf[512] = { 0 };
+    const uint8_t write_cdb[VIRTIO_SCSI_CDB_SIZE] = {
+        /* WRITE(10) to LBA 0, transfer length 1 */
+        0x2a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00
+    };
+
+    alloc = t_alloc;
+    vs = qvirtio_scsi_init(scsi->vdev);
+
+    /* Create a temporary qcow2 overlay*/
+    fd = mkstemp(tmp_path);
+    g_assert(fd >= 0);
+    close(fd);
+
+    if (!have_qemu_img()) {
+        g_test_message("QTEST_QEMU_IMG not set or qemu-img missing; "
+                       "skipping snapshot test");
+        goto fail;
+    }
+
+    mkqcow2(tmp_path, 64);
+
+    /* Attach the overlay to the null0 node */
+    qtest_qmp_assert_success(scsi_pci->pci_vdev.pdev->bus->qts,
+                             "{'execute': 'blockdev-add', 'arguments': {"
+                             "   'driver': 'qcow2', 'node-name': 'overlay',"
+                             "   'backing': 'null0', 'file': {"
+                             "     'driver': 'file', 'filename': %s}}}",
+                             tmp_path);
+
+    /* Send a request to see if the AioContext is still right */
+    ret = virtio_scsi_do_command(vs, write_cdb, NULL, 0, buf, 512, NULL);
+    g_assert_cmphex(ret, ==, 0);
+
+fail:
+    qvirtio_scsi_pci_free(vs);
+    unlink(tmp_path);
+}
+
+static void *virtio_scsi_hotplug_setup(GString *cmd_line, void *arg)
+{
+    g_string_append(cmd_line,
+                    " -drive id=drv1,if=none,file=null-co://,"
+                    "file.read-zeroes=on,format=raw");
+    return arg;
+}
+
+static void *virtio_scsi_setup(GString *cmd_line, void *arg)
+{
+    g_string_append(cmd_line,
+                    " -drive file=blkdebug::null-co://,"
+                    "file.image.read-zeroes=on,"
+                    "if=none,id=dr1,format=raw,file.align=4k "
+                    "-device scsi-hd,drive=dr1,lun=0,scsi-id=1");
+    return arg;
+}
+
+static void *virtio_scsi_setup_4k(GString *cmd_line, void *arg)
+{
+    g_string_append(cmd_line,
+                    " -drive file=blkdebug::null-co://,"
+                    "file.image.read-zeroes=on,"
+                    "if=none,id=dr1,format=raw "
+                    "-device scsi-hd,drive=dr1,lun=0,scsi-id=1"
+                    ",logical_block_size=4k,physical_block_size=4k");
+    return arg;
+}
+
+static void *virtio_scsi_setup_cd(GString *cmd_line, void *arg)
+{
+    g_string_append(cmd_line,
+                    " -drive file=null-co://,"
+                    "file.read-zeroes=on,"
+                    "if=none,id=dr1,format=raw "
+                    "-device scsi-cd,drive=dr1,lun=0,scsi-id=1");
+    return arg;
+}
+
+static void *virtio_scsi_setup_iothread(GString *cmd_line, void *arg)
+{
+    g_string_append(cmd_line,
+                    " -object iothread,id=thread0"
+                    " -blockdev driver=null-co,read-zeroes=on,node-name=null0"
+                    " -device scsi-hd,drive=null0");
+    return arg;
+}
+
+static void register_virtio_scsi_test(void)
+{
+    QOSGraphTestOptions opts = { };
+
+    opts.before = virtio_scsi_hotplug_setup;
+    qos_add_test("hotplug", "virtio-scsi", hotplug, &opts);
+
+    opts.before = virtio_scsi_setup;
+    qos_add_test("unaligned-write-same", "virtio-scsi",
+                 test_unaligned_write_same, &opts);
+
+    opts.before = virtio_scsi_setup_4k;
+    qos_add_test("large-lba-unmap", "virtio-scsi",
+                 test_unmap_large_lba, &opts);
+
+    opts.before = virtio_scsi_setup_cd;
+    qos_add_test("write-to-cdrom", "virtio-scsi", test_write_to_cdrom, &opts);
+
+    opts.before = virtio_scsi_setup_iothread;
+    opts.edge = (QOSGraphEdgeOptions) {
+        .extra_device_opts = "iothread=thread0",
+    };
+    qos_add_test("iothread-attach-node", "virtio-scsi-pci",
+                 test_iothread_attach_node, &opts);
+}
+
+libqos_init(register_virtio_scsi_test);