tests/qtest/virtio-scsi-test.c

   1 /*
   2  * QTest testcase for VirtIO SCSI
   3  *
   4  * Copyright (c) 2014 SUSE LINUX Products GmbH
   5  * Copyright (c) 2015 Red Hat Inc.
   6  *
   7  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   8  * See the COPYING file in the top-level directory.
   9  */
  10
  11 #include "qemu/osdep.h"
  12 #include "libqtest-single.h"
  13 #include "qemu/module.h"
  14 #include "scsi/constants.h"
  15 #include "libqos/libqos-pc.h"
  16 #include "libqos/libqos-spapr.h"
  17 #include "libqos/virtio.h"
  18 #include "libqos/virtio-pci.h"
  19 #include "standard-headers/linux/virtio_ids.h"
  20 #include "standard-headers/linux/virtio_pci.h"
  21 #include "standard-headers/linux/virtio_scsi.h"
  22 #include "libqos/virtio-scsi.h"
  23 #include "libqos/qgraph.h"
  24
  25 #define PCI_SLOT                0x02
  26 #define PCI_FN                  0x00
  27 #define QVIRTIO_SCSI_TIMEOUT_US (1 * 1000 * 1000)
  28
  29 #define MAX_NUM_QUEUES 64
  30
  31 typedef struct {
  32     QVirtioDevice *dev;
  33     int num_queues;
  34     QVirtQueue *vq[MAX_NUM_QUEUES + 2];
  35 } QVirtioSCSIQueues;
  36
  37 static QGuestAllocator *alloc;
  38
  39 static void qvirtio_scsi_pci_free(QVirtioSCSIQueues *vs)
  40 {
  41     int i;
  42
  43     for (i = 0; i < vs->num_queues + 2; i++) {
  44         qvirtqueue_cleanup(vs->dev->bus, vs->vq[i], alloc);
  45     }
  46     g_free(vs);
  47 }
  48
  49 static uint64_t qvirtio_scsi_alloc(QVirtioSCSIQueues *vs, size_t alloc_size,
  50                                    const void *data)
  51 {
  52     uint64_t addr;
  53
  54     addr = guest_alloc(alloc, alloc_size);
  55     if (data) {
  56         memwrite(addr, data, alloc_size);
  57     }
  58
  59     return addr;
  60 }
  61
  62 static uint8_t virtio_scsi_do_command(QVirtioSCSIQueues *vs,
  63                                       const uint8_t *cdb,
  64                                       const uint8_t *data_in,
  65                                       size_t data_in_len,
  66                                       uint8_t *data_out, size_t data_out_len,
  67                                       struct virtio_scsi_cmd_resp *resp_out)
  68 {
  69     QVirtQueue *vq;
  70     struct virtio_scsi_cmd_req req = { { 0 } };
  71     struct virtio_scsi_cmd_resp resp = { .response = 0xff, .status = 0xff };
  72     uint64_t req_addr, resp_addr, data_in_addr = 0, data_out_addr = 0;
  73     uint8_t response;
  74     uint32_t free_head;
  75     QTestState *qts = global_qtest;
  76
  77     vq = vs->vq[2];
  78
  79     req.lun[0] = 1; /* Select LUN */
  80     req.lun[1] = 1; /* Select target 1 */
  81     memcpy(req.cdb, cdb, VIRTIO_SCSI_CDB_SIZE);
  82
  83     /* XXX: Fix endian if any multi-byte field in req/resp is used */
  84
  85     /* Add request header */
  86     req_addr = qvirtio_scsi_alloc(vs, sizeof(req), &req);
  87     free_head = qvirtqueue_add(qts, vq, req_addr, sizeof(req), false, true);
  88
  89     if (data_out_len) {
  90         data_out_addr = qvirtio_scsi_alloc(vs, data_out_len, data_out);
  91         qvirtqueue_add(qts, vq, data_out_addr, data_out_len, false, true);
  92     }
  93
  94     /* Add response header */
  95     resp_addr = qvirtio_scsi_alloc(vs, sizeof(resp), &resp);
  96     qvirtqueue_add(qts, vq, resp_addr, sizeof(resp), true, !!data_in_len);
  97
  98     if (data_in_len) {
  99         data_in_addr = qvirtio_scsi_alloc(vs, data_in_len, data_in);
 100         qvirtqueue_add(qts, vq, data_in_addr, data_in_len, true, false);
 101     }
 102
 103     qvirtqueue_kick(qts, vs->dev, vq, free_head);
 104     qvirtio_wait_used_elem(qts, vs->dev, vq, free_head, NULL,
 105                            QVIRTIO_SCSI_TIMEOUT_US);
 106
 107     response = readb(resp_addr +
 108                      offsetof(struct virtio_scsi_cmd_resp, response));
 109
 110     if (resp_out) {
 111         memread(resp_addr, resp_out, sizeof(*resp_out));
 112     }
 113
 114     guest_free(alloc, req_addr);
 115     guest_free(alloc, resp_addr);
 116     guest_free(alloc, data_in_addr);
 117     guest_free(alloc, data_out_addr);
 118     return response;
 119 }
 120
 121 static QVirtioSCSIQueues *qvirtio_scsi_init(QVirtioDevice *dev)
 122 {
 123     QVirtioSCSIQueues *vs;
 124     const uint8_t test_unit_ready_cdb[VIRTIO_SCSI_CDB_SIZE] = {};
 125     struct virtio_scsi_cmd_resp resp;
 126     uint64_t features;
 127     int i;
 128
 129     vs = g_new0(QVirtioSCSIQueues, 1);
 130     vs->dev = dev;
 131
 132     features = qvirtio_get_features(dev);
 133     features &= ~(QVIRTIO_F_BAD_FEATURE | (1ull << VIRTIO_RING_F_EVENT_IDX));
 134     qvirtio_set_features(dev, features);
 135
 136     vs->num_queues = qvirtio_config_readl(dev, 0);
 137
 138     g_assert_cmpint(vs->num_queues, <, MAX_NUM_QUEUES);
 139
 140     for (i = 0; i < vs->num_queues + 2; i++) {
 141         vs->vq[i] = qvirtqueue_setup(dev, alloc, i);
 142     }
 143
 144     qvirtio_set_driver_ok(dev);
 145
 146     /* Clear the POWER ON OCCURRED unit attention */
 147     g_assert_cmpint(virtio_scsi_do_command(vs, test_unit_ready_cdb,
 148                                            NULL, 0, NULL, 0, &resp),
 149                     ==, 0);
 150     g_assert_cmpint(resp.status, ==, CHECK_CONDITION);
 151     g_assert_cmpint(resp.sense[0], ==, 0x70); /* Fixed format sense buffer */
 152     g_assert_cmpint(resp.sense[2], ==, UNIT_ATTENTION);
 153     g_assert_cmpint(resp.sense[12], ==, 0x29); /* POWER ON */
 154     g_assert_cmpint(resp.sense[13], ==, 0x00);
 155
 156     return vs;
 157 }
 158
 159 static void hotplug(void *obj, void *data, QGuestAllocator *alloc)
 160 {
 161     QTestState *qts = global_qtest;
 162
 163     qtest_qmp_device_add(qts, "scsi-hd", "scsihd", "{'drive': 'drv1'}");
 164     qtest_qmp_device_del(qts, "scsihd");
 165 }
 166
 167 /* Test WRITE SAME with the lba not aligned */
 168 static void test_unaligned_write_same(void *obj, void *data,
 169                                       QGuestAllocator *t_alloc)
 170 {
 171     QVirtioSCSI *scsi = obj;
 172     QVirtioSCSIQueues *vs;
 173     uint8_t buf1[512] = { 0 };
 174     uint8_t buf2[512] = { 1 };
 175     const uint8_t write_same_cdb_1[VIRTIO_SCSI_CDB_SIZE] = {
 176         0x41, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x02, 0x00
 177     };
 178     const uint8_t write_same_cdb_2[VIRTIO_SCSI_CDB_SIZE] = {
 179         0x41, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x33, 0x00, 0x00
 180     };
 181     const uint8_t write_same_cdb_ndob[VIRTIO_SCSI_CDB_SIZE] = {
 182         0x41, 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x33, 0x00, 0x00
 183     };
 184
 185     alloc = t_alloc;
 186     vs = qvirtio_scsi_init(scsi->vdev);
 187
 188     g_assert_cmphex(0, ==,
 189         virtio_scsi_do_command(vs, write_same_cdb_1, NULL, 0, buf1, 512,
 190                                NULL));
 191
 192     g_assert_cmphex(0, ==,
 193         virtio_scsi_do_command(vs, write_same_cdb_2, NULL, 0, buf2, 512,
 194                                NULL));
 195
 196     g_assert_cmphex(0, ==,
 197         virtio_scsi_do_command(vs, write_same_cdb_ndob, NULL, 0, NULL, 0,
 198                                NULL));
 199
 200     qvirtio_scsi_pci_free(vs);
 201 }
 202
 203 static void test_iothread_attach_node(void *obj, void *data,
 204                                       QGuestAllocator *t_alloc)
 205 {
 206     QVirtioSCSIPCI *scsi_pci = obj;
 207     QVirtioSCSI *scsi = &scsi_pci->scsi;
 208     QVirtioSCSIQueues *vs;
 209     char tmp_path[] = "/tmp/qtest.XXXXXX";
 210     int fd;
 211     int ret;
 212
 213     uint8_t buf[512] = { 0 };
 214     const uint8_t write_cdb[VIRTIO_SCSI_CDB_SIZE] = {
 215         /* WRITE(10) to LBA 0, transfer length 1 */
 216         0x2a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00
 217     };
 218
 219     alloc = t_alloc;
 220     vs = qvirtio_scsi_init(scsi->vdev);
 221
 222     /* Create a temporary qcow2 overlay*/
 223     fd = mkstemp(tmp_path);
 224     g_assert(fd >= 0);
 225     close(fd);
 226
 227     if (!have_qemu_img()) {
 228         g_test_message("QTEST_QEMU_IMG not set or qemu-img missing; "
 229                        "skipping snapshot test");
 230         goto fail;
 231     }
 232
 233     mkqcow2(tmp_path, 64);
 234
 235     /* Attach the overlay to the null0 node */
 236     qtest_qmp_assert_success(scsi_pci->pci_vdev.pdev->bus->qts,
 237                              "{'execute': 'blockdev-add', 'arguments': {"
 238                              "   'driver': 'qcow2', 'node-name': 'overlay',"
 239                              "   'backing': 'null0', 'file': {"
 240                              "     'driver': 'file', 'filename': %s}}}",
 241                              tmp_path);
 242
 243     /* Send a request to see if the AioContext is still right */
 244     ret = virtio_scsi_do_command(vs, write_cdb, NULL, 0, buf, 512, NULL);
 245     g_assert_cmphex(ret, ==, 0);
 246
 247 fail:
 248     qvirtio_scsi_pci_free(vs);
 249     unlink(tmp_path);
 250 }
 251
 252 static void *virtio_scsi_hotplug_setup(GString *cmd_line, void *arg)
 253 {
 254     g_string_append(cmd_line,
 255                     " -drive id=drv1,if=none,file=null-co://,"
 256                     "file.read-zeroes=on,format=raw");
 257     return arg;
 258 }
 259
 260 static void *virtio_scsi_setup(GString *cmd_line, void *arg)
 261 {
 262     g_string_append(cmd_line,
 263                     " -drive file=blkdebug::null-co://,"
 264                     "file.image.read-zeroes=on,"
 265                     "if=none,id=dr1,format=raw,file.align=4k "
 266                     "-device scsi-hd,drive=dr1,lun=0,scsi-id=1");
 267     return arg;
 268 }
 269
 270 static void *virtio_scsi_setup_iothread(GString *cmd_line, void *arg)
 271 {
 272     g_string_append(cmd_line,
 273                     " -object iothread,id=thread0"
 274                     " -blockdev driver=null-co,read-zeroes=on,node-name=null0"
 275                     " -device scsi-hd,drive=null0");
 276     return arg;
 277 }
 278
 279 static void register_virtio_scsi_test(void)
 280 {
 281     QOSGraphTestOptions opts = { };
 282
 283     opts.before = virtio_scsi_hotplug_setup;
 284     qos_add_test("hotplug", "virtio-scsi", hotplug, &opts);
 285
 286     opts.before = virtio_scsi_setup;
 287     qos_add_test("unaligned-write-same", "virtio-scsi",
 288                  test_unaligned_write_same, &opts);
 289
 290     opts.before = virtio_scsi_setup_iothread;
 291     opts.edge = (QOSGraphEdgeOptions) {
 292         .extra_device_opts = "iothread=thread0",
 293     };
 294     qos_add_test("iothread-attach-node", "virtio-scsi-pci",
 295                  test_iothread_attach_node, &opts);
 296 }
 297
 298 libqos_init(register_virtio_scsi_test);