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_cmpstr(buffer, ==, "TEST");
  95 }
  96
  97 static void rx_stop_cont_test(QVirtioDevice *dev,
  98                               QGuestAllocator *alloc, QVirtQueue *vq,
  99                               int socket)
 100 {
 101     QTestState *qts = global_qtest;
 102     uint64_t req_addr;
 103     uint32_t free_head;
 104     char test[] = "TEST";
 105     char buffer[64];
 106     int len = htonl(sizeof(test));
 107     QDict *rsp;
 108     struct iovec iov[] = {
 109         {
 110             .iov_base = &len,
 111             .iov_len = sizeof(len),
 112         }, {
 113             .iov_base = test,
 114             .iov_len = sizeof(test),
 115         },
 116     };
 117     int ret;
 118
 119     req_addr = guest_alloc(alloc, 64);
 120
 121     free_head = qvirtqueue_add(qts, vq, req_addr, 64, true, false);
 122     qvirtqueue_kick(qts, dev, vq, free_head);
 123
 124     rsp = qmp("{ 'execute' : 'stop'}");
 125     qobject_unref(rsp);
 126
 127     ret = iov_send(socket, iov, 2, 0, sizeof(len) + sizeof(test));
 128     g_assert_cmpint(ret, ==, sizeof(test) + sizeof(len));
 129
 130     /* We could check the status, but this command is more importantly to
 131      * ensure the packet data gets queued in QEMU, before we do 'cont'.
 132      */
 133     rsp = qmp("{ 'execute' : 'query-status'}");
 134     qobject_unref(rsp);
 135     rsp = qmp("{ 'execute' : 'cont'}");
 136     qobject_unref(rsp);
 137
 138     qvirtio_wait_used_elem(qts, dev, vq, free_head, NULL,
 139                            QVIRTIO_NET_TIMEOUT_US);
 140     memread(req_addr + VNET_HDR_SIZE, buffer, sizeof(test));
 141     g_assert_cmpstr(buffer, ==, "TEST");
 142
 143     guest_free(alloc, req_addr);
 144 }
 145
 146 static void send_recv_test(void *obj, void *data, QGuestAllocator *t_alloc)
 147 {
 148     QVirtioNet *net_if = obj;
 149     QVirtioDevice *dev = net_if->vdev;
 150     QVirtQueue *rx = net_if->queues[0];
 151     QVirtQueue *tx = net_if->queues[1];
 152     int *sv = data;
 153
 154     rx_test(dev, t_alloc, rx, sv[0]);
 155     tx_test(dev, t_alloc, tx, sv[0]);
 156 }
 157
 158 static void stop_cont_test(void *obj, void *data, QGuestAllocator *t_alloc)
 159 {
 160     QVirtioNet *net_if = obj;
 161     QVirtioDevice *dev = net_if->vdev;
 162     QVirtQueue *rx = net_if->queues[0];
 163     int *sv = data;
 164
 165     rx_stop_cont_test(dev, t_alloc, rx, sv[0]);
 166 }
 167
 168 static void hotplug(void *obj, void *data, QGuestAllocator *t_alloc)
 169 {
 170     QVirtioPCIDevice *dev = obj;
 171     QTestState *qts = dev->pdev->bus->qts;
 172     const char *arch = qtest_get_arch();
 173
 174     if (dev->pdev->bus->not_hotpluggable) {
 175         g_test_skip("pci bus does not support hotplug");
 176         return;
 177     }
 178
 179     qtest_qmp_device_add(qts, "virtio-net-pci", "net1",
 180                          "{'addr': %s}", stringify(PCI_SLOT_HP));
 181
 182     if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
 183         qpci_unplug_acpi_device_test(qts, "net1", PCI_SLOT_HP);
 184     }
 185 }
 186
 187 static void announce_self(void *obj, void *data, QGuestAllocator *t_alloc)
 188 {
 189     int *sv = data;
 190     char buffer[60];
 191     int len;
 192     QDict *rsp;
 193     int ret;
 194     uint16_t *proto = (uint16_t *)&buffer[12];
 195     size_t total_received = 0;
 196     uint64_t start, now, last_rxt, deadline;
 197
 198     /* Send a set of packets over a few second period */
 199     rsp = qmp("{ 'execute' : 'announce-self', "
 200                   " 'arguments': {"
 201                       " 'initial': 20, 'max': 100,"
 202                       " 'rounds': 300, 'step': 10, 'id': 'bob' } }");
 203     assert(!qdict_haskey(rsp, "error"));
 204     qobject_unref(rsp);
 205
 206     /* Catch the first packet and make sure it's a RARP */
 207     ret = recv(sv[0], &len, sizeof(len), 0);
 208     g_assert_cmpint(ret, ==,  sizeof(len));
 209     len = ntohl(len);
 210
 211     ret = recv(sv[0], buffer, len, 0);
 212     g_assert_cmpint(*proto, ==, htons(ETH_P_RARP));
 213
 214     /*
 215      * Stop the announcment by settings rounds to 0 on the
 216      * existing timer.
 217      */
 218     rsp = qmp("{ 'execute' : 'announce-self', "
 219                   " 'arguments': {"
 220                       " 'initial': 20, 'max': 100,"
 221                       " 'rounds': 0, 'step': 10, 'id': 'bob' } }");
 222     assert(!qdict_haskey(rsp, "error"));
 223     qobject_unref(rsp);
 224
 225     /* Now make sure the packets stop */
 226
 227     /* Times are in us */
 228     start = g_get_monotonic_time();
 229     /* 30 packets, max gap 100ms, * 4 for wiggle */
 230     deadline = start + 1000 * (100 * 30 * 4);
 231     last_rxt = start;
 232
 233     while (true) {
 234         int saved_err;
 235         ret = recv(sv[0], buffer, 60, MSG_DONTWAIT);
 236         saved_err = errno;
 237         now = g_get_monotonic_time();
 238         g_assert_cmpint(now, <, deadline);
 239
 240         if (ret >= 0) {
 241             if (ret) {
 242                 last_rxt = now;
 243             }
 244             total_received += ret;
 245
 246             /* Check it's not spewing loads */
 247             g_assert_cmpint(total_received, <, 60 * 30 * 2);
 248         } else {
 249             g_assert_cmpint(saved_err, ==, EAGAIN);
 250
 251             /* 400ms, i.e. 4 worst case gaps */
 252             if ((now - last_rxt) > (1000 * 100 * 4)) {
 253                 /* Nothings arrived for a while - must have stopped */
 254                 break;
 255             };
 256
 257             /* 100ms */
 258             g_usleep(1000 * 100);
 259         }
 260     };
 261 }
 262
 263 static void virtio_net_test_cleanup(void *sockets)
 264 {
 265     int *sv = sockets;
 266
 267     close(sv[0]);
 268     qos_invalidate_command_line();
 269     close(sv[1]);
 270     g_free(sv);
 271 }
 272
 273 static void *virtio_net_test_setup(GString *cmd_line, void *arg)
 274 {
 275     int ret;
 276     int *sv = g_new(int, 2);
 277
 278     ret = socketpair(PF_UNIX, SOCK_STREAM, 0, sv);
 279     g_assert_cmpint(ret, !=, -1);
 280
 281     g_string_append_printf(cmd_line, " -netdev socket,fd=%d,id=hs0 ", sv[1]);
 282
 283     g_test_queue_destroy(virtio_net_test_cleanup, sv);
 284     return sv;
 285 }
 286
 287 #endif /* _WIN32 */
 288
 289 static void large_tx(void *obj, void *data, QGuestAllocator *t_alloc)
 290 {
 291     QVirtioNet *dev = obj;
 292     QVirtQueue *vq = dev->queues[1];
 293     uint64_t req_addr;
 294     uint32_t free_head;
 295     size_t alloc_size = (size_t)data / 64;
 296     QTestState *qts = global_qtest;
 297     int i;
 298
 299     /* Bypass the limitation by pointing several descriptors to a single
 300      * smaller area */
 301     req_addr = guest_alloc(t_alloc, alloc_size);
 302     free_head = qvirtqueue_add(qts, vq, req_addr, alloc_size, false, true);
 303
 304     for (i = 0; i < 64; i++) {
 305         qvirtqueue_add(qts, vq, req_addr, alloc_size, false, i != 63);
 306     }
 307     qvirtqueue_kick(qts, dev->vdev, vq, free_head);
 308
 309     qvirtio_wait_used_elem(qts, dev->vdev, vq, free_head, NULL,
 310                            QVIRTIO_NET_TIMEOUT_US);
 311     guest_free(t_alloc, req_addr);
 312 }
 313
 314 static void *virtio_net_test_setup_nosocket(GString *cmd_line, void *arg)
 315 {
 316     g_string_append(cmd_line, " -netdev hubport,hubid=0,id=hs0 ");
 317     return arg;
 318 }
 319
 320 static void register_virtio_net_test(void)
 321 {
 322     QOSGraphTestOptions opts = { 0 };
 323
 324 #ifndef _WIN32
 325     opts.before = virtio_net_test_setup;
 326     qos_add_test("hotplug", "virtio-net-pci", hotplug, &opts);
 327     qos_add_test("basic", "virtio-net", send_recv_test, &opts);
 328     qos_add_test("rx_stop_cont", "virtio-net", stop_cont_test, &opts);
 329     qos_add_test("announce-self", "virtio-net", announce_self, &opts);
 330 #endif
 331
 332     /* These tests do not need a loopback backend.  */
 333     opts.before = virtio_net_test_setup_nosocket;
 334     opts.arg = (gpointer)UINT_MAX;
 335     qos_add_test("large_tx/uint_max", "virtio-net", large_tx, &opts);
 336     opts.arg = (gpointer)NET_BUFSIZE;
 337     qos_add_test("large_tx/net_bufsize", "virtio-net", large_tx, &opts);
 338 }
 339
 340 libqos_init(register_virtio_net_test);