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