tests/qtest/virtio-net-test.c

   1 /*
   2  * QTest testcase for VirtIO NIC
   3  *
   4  * Copyright (c) 2014 SUSE LINUX Products GmbH
   5  *
   6  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   7  * See the COPYING file in the top-level directory.
   8  */
   9
  10 #include "qemu/osdep.h"
  11 #include "libqtest-single.h"
  12 #include "qemu/iov.h"
  13 #include "qemu/module.h"
  14 #include "qapi/qmp/qdict.h"
  15 #include "hw/virtio/virtio-net.h"
  16 #include "libqos/qgraph.h"
  17 #include "libqos/virtio-net.h"
  18
  19 #ifndef ETH_P_RARP
  20 #define ETH_P_RARP 0x8035
  21 #endif
  22
  23 #define PCI_SLOT_HP             0x06
  24 #define PCI_SLOT                0x04
  25
  26 #define QVIRTIO_NET_TIMEOUT_US (30 * 1000 * 1000)
  27 #define VNET_HDR_SIZE sizeof(struct virtio_net_hdr_mrg_rxbuf)
  28
  29 #ifndef _WIN32
  30
  31 static void rx_test(QVirtioDevice *dev,
  32                     QGuestAllocator *alloc, QVirtQueue *vq,
  33                     int socket)
  34 {
  35     QTestState *qts = global_qtest;
  36     uint64_t req_addr;
  37     uint32_t free_head;
  38     char test[] = "TEST";
  39     char buffer[64];
  40     int len = htonl(sizeof(test));
  41     struct iovec iov[] = {
  42         {
  43             .iov_base = &len,
  44             .iov_len = sizeof(len),
  45         }, {
  46             .iov_base = test,
  47             .iov_len = sizeof(test),
  48         },
  49     };
  50     int ret;
  51
  52     req_addr = guest_alloc(alloc, 64);
  53
  54     free_head = qvirtqueue_add(qts, vq, req_addr, 64, true, false);
  55     qvirtqueue_kick(qts, dev, vq, free_head);
  56
  57     ret = iov_send(socket, iov, 2, 0, sizeof(len) + sizeof(test));
  58     g_assert_cmpint(ret, ==, sizeof(test) + sizeof(len));
  59
  60     qvirtio_wait_used_elem(qts, dev, vq, free_head, NULL,
  61                            QVIRTIO_NET_TIMEOUT_US);
  62     memread(req_addr + VNET_HDR_SIZE, buffer, sizeof(test));
  63     g_assert_cmpstr(buffer, ==, "TEST");
  64
  65     guest_free(alloc, req_addr);
  66 }
  67
  68 static void tx_test(QVirtioDevice *dev,
  69                     QGuestAllocator *alloc, QVirtQueue *vq,
  70                     int socket)
  71 {
  72     QTestState *qts = global_qtest;
  73     uint64_t req_addr;
  74     uint32_t free_head;
  75     uint32_t len;
  76     char buffer[64];
  77     int ret;
  78
  79     req_addr = guest_alloc(alloc, 64);
  80     memwrite(req_addr + VNET_HDR_SIZE, "TEST", 4);
  81
  82     free_head = qvirtqueue_add(qts, vq, req_addr, 64, false, false);
  83     qvirtqueue_kick(qts, dev, vq, free_head);
  84
  85     qvirtio_wait_used_elem(qts, dev, vq, free_head, NULL,
  86                            QVIRTIO_NET_TIMEOUT_US);
  87     guest_free(alloc, req_addr);
  88
  89     ret = recv(socket, &len, sizeof(len), 0);
  90     g_assert_cmpint(ret, ==, sizeof(len));
  91     len = ntohl(len);
  92
  93     ret = recv(socket, buffer, len, 0);
  94     g_assert_cmpint(ret, ==, len);
  95     g_assert_cmpstr(buffer, ==, "TEST");
  96 }
  97
  98 static void rx_stop_cont_test(QVirtioDevice *dev,
  99                               QGuestAllocator *alloc, QVirtQueue *vq,
 100                               int socket)
 101 {
 102     QTestState *qts = global_qtest;
 103     uint64_t req_addr;
 104     uint32_t free_head;
 105     char test[] = "TEST";
 106     char buffer[64];
 107     int len = htonl(sizeof(test));
 108     QDict *rsp;
 109     struct iovec iov[] = {
 110         {
 111             .iov_base = &len,
 112             .iov_len = sizeof(len),
 113         }, {
 114             .iov_base = test,
 115             .iov_len = sizeof(test),
 116         },
 117     };
 118     int ret;
 119
 120     req_addr = guest_alloc(alloc, 64);
 121
 122     free_head = qvirtqueue_add(qts, vq, req_addr, 64, true, false);
 123     qvirtqueue_kick(qts, dev, vq, free_head);
 124
 125     rsp = qmp("{ 'execute' : 'stop'}");
 126     qobject_unref(rsp);
 127
 128     ret = iov_send(socket, iov, 2, 0, sizeof(len) + sizeof(test));
 129     g_assert_cmpint(ret, ==, sizeof(test) + sizeof(len));
 130
 131     /* We could check the status, but this command is more importantly to
 132      * ensure the packet data gets queued in QEMU, before we do 'cont'.
 133      */
 134     rsp = qmp("{ 'execute' : 'query-status'}");
 135     qobject_unref(rsp);
 136     rsp = qmp("{ 'execute' : 'cont'}");
 137     qobject_unref(rsp);
 138
 139     qvirtio_wait_used_elem(qts, dev, vq, free_head, NULL,
 140                            QVIRTIO_NET_TIMEOUT_US);
 141     memread(req_addr + VNET_HDR_SIZE, buffer, sizeof(test));
 142     g_assert_cmpstr(buffer, ==, "TEST");
 143
 144     guest_free(alloc, req_addr);
 145 }
 146
 147 static void send_recv_test(void *obj, void *data, QGuestAllocator *t_alloc)
 148 {
 149     QVirtioNet *net_if = obj;
 150     QVirtioDevice *dev = net_if->vdev;
 151     QVirtQueue *rx = net_if->queues[0];
 152     QVirtQueue *tx = net_if->queues[1];
 153     int *sv = data;
 154
 155     rx_test(dev, t_alloc, rx, sv[0]);
 156     tx_test(dev, t_alloc, tx, sv[0]);
 157 }
 158
 159 static void stop_cont_test(void *obj, void *data, QGuestAllocator *t_alloc)
 160 {
 161     QVirtioNet *net_if = obj;
 162     QVirtioDevice *dev = net_if->vdev;
 163     QVirtQueue *rx = net_if->queues[0];
 164     int *sv = data;
 165
 166     rx_stop_cont_test(dev, t_alloc, rx, sv[0]);
 167 }
 168
 169 static void hotplug(void *obj, void *data, QGuestAllocator *t_alloc)
 170 {
 171     QVirtioPCIDevice *dev = obj;
 172     QTestState *qts = dev->pdev->bus->qts;
 173     const char *arch = qtest_get_arch();
 174
 175     if (dev->pdev->bus->not_hotpluggable) {
 176         g_test_skip("pci bus does not support hotplug");
 177         return;
 178     }
 179
 180     qtest_qmp_device_add(qts, "virtio-net-pci", "net1",
 181                          "{'addr': %s}", stringify(PCI_SLOT_HP));
 182
 183     if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
 184         qpci_unplug_acpi_device_test(qts, "net1", PCI_SLOT_HP);
 185     }
 186 }
 187
 188 static void announce_self(void *obj, void *data, QGuestAllocator *t_alloc)
 189 {
 190     int *sv = data;
 191     char buffer[60];
 192     int len;
 193     QDict *rsp;
 194     int ret;
 195     uint16_t *proto = (uint16_t *)&buffer[12];
 196     size_t total_received = 0;
 197     uint64_t start, now, last_rxt, deadline;
 198
 199     /* Send a set of packets over a few second period */
 200     rsp = qmp("{ 'execute' : 'announce-self', "
 201                   " 'arguments': {"
 202                       " 'initial': 20, 'max': 100,"
 203                       " 'rounds': 300, 'step': 10, 'id': 'bob' } }");
 204     assert(!qdict_haskey(rsp, "error"));
 205     qobject_unref(rsp);
 206
 207     /* Catch the first packet and make sure it's a RARP */
 208     ret = recv(sv[0], &len, sizeof(len), 0);
 209     g_assert_cmpint(ret, ==,  sizeof(len));
 210     len = ntohl(len);
 211
 212     ret = recv(sv[0], buffer, len, 0);
 213     g_assert_cmpint(*proto, ==, htons(ETH_P_RARP));
 214
 215     /*
 216      * Stop the announcement by settings rounds to 0 on the
 217      * existing timer.
 218      */
 219     rsp = qmp("{ 'execute' : 'announce-self', "
 220                   " 'arguments': {"
 221                       " 'initial': 20, 'max': 100,"
 222                       " 'rounds': 0, 'step': 10, 'id': 'bob' } }");
 223     assert(!qdict_haskey(rsp, "error"));
 224     qobject_unref(rsp);
 225
 226     /* Now make sure the packets stop */
 227
 228     /* Times are in us */
 229     start = g_get_monotonic_time();
 230     /* 30 packets, max gap 100ms, * 4 for wiggle */
 231     deadline = start + 1000 * (100 * 30 * 4);
 232     last_rxt = start;
 233
 234     while (true) {
 235         int saved_err;
 236         ret = recv(sv[0], buffer, 60, MSG_DONTWAIT);
 237         saved_err = errno;
 238         now = g_get_monotonic_time();
 239         g_assert_cmpint(now, <, deadline);
 240
 241         if (ret >= 0) {
 242             if (ret) {
 243                 last_rxt = now;
 244             }
 245             total_received += ret;
 246
 247             /* Check it's not spewing loads */
 248             g_assert_cmpint(total_received, <, 60 * 30 * 2);
 249         } else {
 250             g_assert_cmpint(saved_err, ==, EAGAIN);
 251
 252             /* 400ms, i.e. 4 worst case gaps */
 253             if ((now - last_rxt) > (1000 * 100 * 4)) {
 254                 /* Nothings arrived for a while - must have stopped */
 255                 break;
 256             };
 257
 258             /* 100ms */
 259             g_usleep(1000 * 100);
 260         }
 261     };
 262 }
 263
 264 static void virtio_net_test_cleanup(void *sockets)
 265 {
 266     int *sv = sockets;
 267
 268     close(sv[0]);
 269     qos_invalidate_command_line();
 270     close(sv[1]);
 271     g_free(sv);
 272 }
 273
 274 static void *virtio_net_test_setup(GString *cmd_line, void *arg)
 275 {
 276     int ret;
 277     int *sv = g_new(int, 2);
 278
 279     ret = socketpair(PF_UNIX, SOCK_STREAM, 0, sv);
 280     g_assert_cmpint(ret, !=, -1);
 281
 282     g_string_append_printf(cmd_line, " -netdev socket,fd=%d,id=hs0 ", sv[1]);
 283
 284     g_test_queue_destroy(virtio_net_test_cleanup, sv);
 285     return sv;
 286 }
 287
 288 #endif /* _WIN32 */
 289
 290 static void large_tx(void *obj, void *data, QGuestAllocator *t_alloc)
 291 {
 292     QVirtioNet *dev = obj;
 293     QVirtQueue *vq = dev->queues[1];
 294     uint64_t req_addr;
 295     uint32_t free_head;
 296     size_t alloc_size = (size_t)data / 64;
 297     QTestState *qts = global_qtest;
 298     int i;
 299
 300     /* Bypass the limitation by pointing several descriptors to a single
 301      * smaller area */
 302     req_addr = guest_alloc(t_alloc, alloc_size);
 303     free_head = qvirtqueue_add(qts, vq, req_addr, alloc_size, false, true);
 304
 305     for (i = 0; i < 64; i++) {
 306         qvirtqueue_add(qts, vq, req_addr, alloc_size, false, i != 63);
 307     }
 308     qvirtqueue_kick(qts, dev->vdev, vq, free_head);
 309
 310     qvirtio_wait_used_elem(qts, dev->vdev, vq, free_head, NULL,
 311                            QVIRTIO_NET_TIMEOUT_US);
 312     guest_free(t_alloc, req_addr);
 313 }
 314
 315 static void *virtio_net_test_setup_nosocket(GString *cmd_line, void *arg)
 316 {
 317     g_string_append(cmd_line, " -netdev hubport,hubid=0,id=hs0 ");
 318     return arg;
 319 }
 320
 321 static void register_virtio_net_test(void)
 322 {
 323     QOSGraphTestOptions opts = { 0 };
 324
 325 #ifndef _WIN32
 326     opts.before = virtio_net_test_setup;
 327     qos_add_test("hotplug", "virtio-net-pci", hotplug, &opts);
 328     qos_add_test("basic", "virtio-net", send_recv_test, &opts);
 329     qos_add_test("rx_stop_cont", "virtio-net", stop_cont_test, &opts);
 330     qos_add_test("announce-self", "virtio-net", announce_self, &opts);
 331 #endif
 332
 333     /* These tests do not need a loopback backend.  */
 334     opts.before = virtio_net_test_setup_nosocket;
 335     opts.arg = (gpointer)UINT_MAX;
 336     qos_add_test("large_tx/uint_max", "virtio-net", large_tx, &opts);
 337     opts.arg = (gpointer)NET_BUFSIZE;
 338     qos_add_test("large_tx/net_bufsize", "virtio-net", large_tx, &opts);
 339 }
 340
 341 libqos_init(register_virtio_net_test);