tests/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 "qemu-common.h"
  12 #include "libqtest-single.h"
  13 #include "qemu/iov.h"
  14 #include "qemu/module.h"
  15 #include "qapi/qmp/qdict.h"
  16 #include "hw/virtio/virtio-net.h"
  17 #include "libqos/qgraph.h"
  18 #include "libqos/virtio-net.h"
  19
  20 #ifndef ETH_P_RARP
  21 #define ETH_P_RARP 0x8035
  22 #endif
  23
  24 #define PCI_SLOT_HP             0x06
  25 #define PCI_SLOT                0x04
  26
  27 #define QVIRTIO_NET_TIMEOUT_US (30 * 1000 * 1000)
  28 #define VNET_HDR_SIZE sizeof(struct virtio_net_hdr_mrg_rxbuf)
  29
  30 #ifndef _WIN32
  31
  32 static void rx_test(QVirtioDevice *dev,
  33                     QGuestAllocator *alloc, QVirtQueue *vq,
  34                     int socket)
  35 {
  36     QTestState *qts = global_qtest;
  37     uint64_t req_addr;
  38     uint32_t free_head;
  39     char test[] = "TEST";
  40     char buffer[64];
  41     int len = htonl(sizeof(test));
  42     struct iovec iov[] = {
  43         {
  44             .iov_base = &len,
  45             .iov_len = sizeof(len),
  46         }, {
  47             .iov_base = test,
  48             .iov_len = sizeof(test),
  49         },
  50     };
  51     int ret;
  52
  53     req_addr = guest_alloc(alloc, 64);
  54
  55     free_head = qvirtqueue_add(qts, vq, req_addr, 64, true, false);
  56     qvirtqueue_kick(qts, dev, vq, free_head);
  57
  58     ret = iov_send(socket, iov, 2, 0, sizeof(len) + sizeof(test));
  59     g_assert_cmpint(ret, ==, sizeof(test) + sizeof(len));
  60
  61     qvirtio_wait_used_elem(qts, dev, vq, free_head, NULL,
  62                            QVIRTIO_NET_TIMEOUT_US);
  63     memread(req_addr + VNET_HDR_SIZE, buffer, sizeof(test));
  64     g_assert_cmpstr(buffer, ==, "TEST");
  65
  66     guest_free(alloc, req_addr);
  67 }
  68
  69 static void tx_test(QVirtioDevice *dev,
  70                     QGuestAllocator *alloc, QVirtQueue *vq,
  71                     int socket)
  72 {
  73     QTestState *qts = global_qtest;
  74     uint64_t req_addr;
  75     uint32_t free_head;
  76     uint32_t len;
  77     char buffer[64];
  78     int ret;
  79
  80     req_addr = guest_alloc(alloc, 64);
  81     memwrite(req_addr + VNET_HDR_SIZE, "TEST", 4);
  82
  83     free_head = qvirtqueue_add(qts, vq, req_addr, 64, false, false);
  84     qvirtqueue_kick(qts, dev, vq, free_head);
  85
  86     qvirtio_wait_used_elem(qts, dev, vq, free_head, NULL,
  87                            QVIRTIO_NET_TIMEOUT_US);
  88     guest_free(alloc, req_addr);
  89
  90     ret = qemu_recv(socket, &len, sizeof(len), 0);
  91     g_assert_cmpint(ret, ==, sizeof(len));
  92     len = ntohl(len);
  93
  94     ret = qemu_recv(socket, buffer, len, 0);
  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 #endif
 170
 171 static void hotplug(void *obj, void *data, QGuestAllocator *t_alloc)
 172 {
 173     QVirtioPCIDevice *dev = obj;
 174     QTestState *qts = dev->pdev->bus->qts;
 175     const char *arch = qtest_get_arch();
 176
 177     qtest_qmp_device_add(qts, "virtio-net-pci", "net1",
 178                          "{'addr': %s}", stringify(PCI_SLOT_HP));
 179
 180     if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
 181         qpci_unplug_acpi_device_test(qts, "net1", PCI_SLOT_HP);
 182     }
 183 }
 184
 185 static void announce_self(void *obj, void *data, QGuestAllocator *t_alloc)
 186 {
 187     int *sv = data;
 188     char buffer[60];
 189     int len;
 190     QDict *rsp;
 191     int ret;
 192     uint16_t *proto = (uint16_t *)&buffer[12];
 193     size_t total_received = 0;
 194     uint64_t start, now, last_rxt, deadline;
 195
 196     /* Send a set of packets over a few second period */
 197     rsp = qmp("{ 'execute' : 'announce-self', "
 198                   " 'arguments': {"
 199                       " 'initial': 20, 'max': 100,"
 200                       " 'rounds': 300, 'step': 10, 'id': 'bob' } }");
 201     assert(!qdict_haskey(rsp, "error"));
 202     qobject_unref(rsp);
 203
 204     /* Catch the first packet and make sure it's a RARP */
 205     ret = qemu_recv(sv[0], &len, sizeof(len), 0);
 206     g_assert_cmpint(ret, ==,  sizeof(len));
 207     len = ntohl(len);
 208
 209     ret = qemu_recv(sv[0], buffer, len, 0);
 210     g_assert_cmpint(*proto, ==, htons(ETH_P_RARP));
 211
 212     /*
 213      * Stop the announcment by settings rounds to 0 on the
 214      * existing timer.
 215      */
 216     rsp = qmp("{ 'execute' : 'announce-self', "
 217                   " 'arguments': {"
 218                       " 'initial': 20, 'max': 100,"
 219                       " 'rounds': 0, 'step': 10, 'id': 'bob' } }");
 220     assert(!qdict_haskey(rsp, "error"));
 221     qobject_unref(rsp);
 222
 223     /* Now make sure the packets stop */
 224
 225     /* Times are in us */
 226     start = g_get_monotonic_time();
 227     /* 30 packets, max gap 100ms, * 4 for wiggle */
 228     deadline = start + 1000 * (100 * 30 * 4);
 229     last_rxt = start;
 230
 231     while (true) {
 232         int saved_err;
 233         ret = qemu_recv(sv[0], buffer, 60, MSG_DONTWAIT);
 234         saved_err = errno;
 235         now = g_get_monotonic_time();
 236         g_assert_cmpint(now, <, deadline);
 237
 238         if (ret >= 0) {
 239             if (ret) {
 240                 last_rxt = now;
 241             }
 242             total_received += ret;
 243
 244             /* Check it's not spewing loads */
 245             g_assert_cmpint(total_received, <, 60 * 30 * 2);
 246         } else {
 247             g_assert_cmpint(saved_err, ==, EAGAIN);
 248
 249             /* 400ms, i.e. 4 worst case gaps */
 250             if ((now - last_rxt) > (1000 * 100 * 4)) {
 251                 /* Nothings arrived for a while - must have stopped */
 252                 break;
 253             };
 254
 255             /* 100ms */
 256             g_usleep(1000 * 100);
 257         }
 258     };
 259 }
 260
 261 static void virtio_net_test_cleanup(void *sockets)
 262 {
 263     int *sv = sockets;
 264
 265     close(sv[0]);
 266     qos_invalidate_command_line();
 267     close(sv[1]);
 268     g_free(sv);
 269 }
 270
 271 static void *virtio_net_test_setup(GString *cmd_line, void *arg)
 272 {
 273     int ret;
 274     int *sv = g_new(int, 2);
 275
 276     ret = socketpair(PF_UNIX, SOCK_STREAM, 0, sv);
 277     g_assert_cmpint(ret, !=, -1);
 278
 279     g_string_append_printf(cmd_line, " -netdev socket,fd=%d,id=hs0 ", sv[1]);
 280
 281     g_test_queue_destroy(virtio_net_test_cleanup, sv);
 282     return sv;
 283 }
 284
 285 static void large_tx(void *obj, void *data, QGuestAllocator *t_alloc)
 286 {
 287     QVirtioNet *dev = obj;
 288     QVirtQueue *vq = dev->queues[1];
 289     uint64_t req_addr;
 290     uint32_t free_head;
 291     size_t alloc_size = (size_t)data / 64;
 292     QTestState *qts = global_qtest;
 293     int i;
 294
 295     /* Bypass the limitation by pointing several descriptors to a single
 296      * smaller area */
 297     req_addr = guest_alloc(t_alloc, alloc_size);
 298     free_head = qvirtqueue_add(qts, vq, req_addr, alloc_size, false, true);
 299
 300     for (i = 0; i < 64; i++) {
 301         qvirtqueue_add(qts, vq, req_addr, alloc_size, false, i != 63);
 302     }
 303     qvirtqueue_kick(qts, dev->vdev, vq, free_head);
 304
 305     qvirtio_wait_used_elem(qts, dev->vdev, vq, free_head, NULL,
 306                            QVIRTIO_NET_TIMEOUT_US);
 307     guest_free(t_alloc, req_addr);
 308 }
 309
 310 static void *virtio_net_test_setup_nosocket(GString *cmd_line, void *arg)
 311 {
 312     g_string_append(cmd_line, " -netdev hubport,hubid=0,id=hs0 ");
 313     return arg;
 314 }
 315
 316 static void register_virtio_net_test(void)
 317 {
 318     QOSGraphTestOptions opts = {
 319         .before = virtio_net_test_setup,
 320     };
 321
 322     qos_add_test("hotplug", "virtio-pci", hotplug, &opts);
 323 #ifndef _WIN32
 324     qos_add_test("basic", "virtio-net", send_recv_test, &opts);
 325     qos_add_test("rx_stop_cont", "virtio-net", stop_cont_test, &opts);
 326 #endif
 327     qos_add_test("announce-self", "virtio-net", announce_self, &opts);
 328
 329     /* These tests do not need a loopback backend.  */
 330     opts.before = virtio_net_test_setup_nosocket;
 331     opts.arg = (gpointer)UINT_MAX;
 332     qos_add_test("large_tx/uint_max", "virtio-net", large_tx, &opts);
 333     opts.arg = (gpointer)NET_BUFSIZE;
 334     qos_add_test("large_tx/net_bufsize", "virtio-net", large_tx, &opts);
 335 }
 336
 337 libqos_init(register_virtio_net_test);