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 "libqtest.h"
  12 #include "qemu/iov.h"
  13 #include "qapi/qmp/qdict.h"
  14 #include "hw/virtio/virtio-net.h"
  15 #include "libqos/qgraph.h"
  16 #include "libqos/virtio-net.h"
  17
  18 #ifndef ETH_P_RARP
  19 #define ETH_P_RARP 0x8035
  20 #endif
  21
  22 #define PCI_SLOT_HP             0x06
  23 #define PCI_SLOT                0x04
  24
  25 #define QVIRTIO_NET_TIMEOUT_US (30 * 1000 * 1000)
  26 #define VNET_HDR_SIZE sizeof(struct virtio_net_hdr_mrg_rxbuf)
  27
  28 #ifndef _WIN32
  29
  30 static void rx_test(QVirtioDevice *dev,
  31                     QGuestAllocator *alloc, QVirtQueue *vq,
  32                     int socket)
  33 {
  34     uint64_t req_addr;
  35     uint32_t free_head;
  36     char test[] = "TEST";
  37     char buffer[64];
  38     int len = htonl(sizeof(test));
  39     struct iovec iov[] = {
  40         {
  41             .iov_base = &len,
  42             .iov_len = sizeof(len),
  43         }, {
  44             .iov_base = test,
  45             .iov_len = sizeof(test),
  46         },
  47     };
  48     int ret;
  49
  50     req_addr = guest_alloc(alloc, 64);
  51
  52     free_head = qvirtqueue_add(vq, req_addr, 64, true, false);
  53     qvirtqueue_kick(dev, vq, free_head);
  54
  55     ret = iov_send(socket, iov, 2, 0, sizeof(len) + sizeof(test));
  56     g_assert_cmpint(ret, ==, sizeof(test) + sizeof(len));
  57
  58     qvirtio_wait_used_elem(dev, vq, free_head, NULL, QVIRTIO_NET_TIMEOUT_US);
  59     memread(req_addr + VNET_HDR_SIZE, buffer, sizeof(test));
  60     g_assert_cmpstr(buffer, ==, "TEST");
  61
  62     guest_free(alloc, req_addr);
  63 }
  64
  65 static void tx_test(QVirtioDevice *dev,
  66                     QGuestAllocator *alloc, QVirtQueue *vq,
  67                     int socket)
  68 {
  69     uint64_t req_addr;
  70     uint32_t free_head;
  71     uint32_t len;
  72     char buffer[64];
  73     int ret;
  74
  75     req_addr = guest_alloc(alloc, 64);
  76     memwrite(req_addr + VNET_HDR_SIZE, "TEST", 4);
  77
  78     free_head = qvirtqueue_add(vq, req_addr, 64, false, false);
  79     qvirtqueue_kick(dev, vq, free_head);
  80
  81     qvirtio_wait_used_elem(dev, vq, free_head, NULL, QVIRTIO_NET_TIMEOUT_US);
  82     guest_free(alloc, req_addr);
  83
  84     ret = qemu_recv(socket, &len, sizeof(len), 0);
  85     g_assert_cmpint(ret, ==, sizeof(len));
  86     len = ntohl(len);
  87
  88     ret = qemu_recv(socket, buffer, len, 0);
  89     g_assert_cmpstr(buffer, ==, "TEST");
  90 }
  91
  92 static void rx_stop_cont_test(QVirtioDevice *dev,
  93                               QGuestAllocator *alloc, QVirtQueue *vq,
  94                               int socket)
  95 {
  96     uint64_t req_addr;
  97     uint32_t free_head;
  98     char test[] = "TEST";
  99     char buffer[64];
 100     int len = htonl(sizeof(test));
 101     QDict *rsp;
 102     struct iovec iov[] = {
 103         {
 104             .iov_base = &len,
 105             .iov_len = sizeof(len),
 106         }, {
 107             .iov_base = test,
 108             .iov_len = sizeof(test),
 109         },
 110     };
 111     int ret;
 112
 113     req_addr = guest_alloc(alloc, 64);
 114
 115     free_head = qvirtqueue_add(vq, req_addr, 64, true, false);
 116     qvirtqueue_kick(dev, vq, free_head);
 117
 118     rsp = qmp("{ 'execute' : 'stop'}");
 119     qobject_unref(rsp);
 120
 121     ret = iov_send(socket, iov, 2, 0, sizeof(len) + sizeof(test));
 122     g_assert_cmpint(ret, ==, sizeof(test) + sizeof(len));
 123
 124     /* We could check the status, but this command is more importantly to
 125      * ensure the packet data gets queued in QEMU, before we do 'cont'.
 126      */
 127     rsp = qmp("{ 'execute' : 'query-status'}");
 128     qobject_unref(rsp);
 129     rsp = qmp("{ 'execute' : 'cont'}");
 130     qobject_unref(rsp);
 131
 132     qvirtio_wait_used_elem(dev, vq, free_head, NULL, QVIRTIO_NET_TIMEOUT_US);
 133     memread(req_addr + VNET_HDR_SIZE, buffer, sizeof(test));
 134     g_assert_cmpstr(buffer, ==, "TEST");
 135
 136     guest_free(alloc, req_addr);
 137 }
 138
 139 static void send_recv_test(void *obj, void *data, QGuestAllocator *t_alloc)
 140 {
 141     QVirtioNet *net_if = obj;
 142     QVirtioDevice *dev = net_if->vdev;
 143     QVirtQueue *rx = net_if->queues[0];
 144     QVirtQueue *tx = net_if->queues[1];
 145     int *sv = data;
 146
 147     rx_test(dev, t_alloc, rx, sv[0]);
 148     tx_test(dev, t_alloc, tx, sv[0]);
 149 }
 150
 151 static void stop_cont_test(void *obj, void *data, QGuestAllocator *t_alloc)
 152 {
 153     QVirtioNet *net_if = obj;
 154     QVirtioDevice *dev = net_if->vdev;
 155     QVirtQueue *rx = net_if->queues[0];
 156     int *sv = data;
 157
 158     rx_stop_cont_test(dev, t_alloc, rx, sv[0]);
 159 }
 160
 161 #endif
 162
 163 static void hotplug(void *obj, void *data, QGuestAllocator *t_alloc)
 164 {
 165     const char *arch = qtest_get_arch();
 166
 167     qtest_qmp_device_add("virtio-net-pci", "net1",
 168                          "{'addr': %s}", stringify(PCI_SLOT_HP));
 169
 170     if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
 171         qpci_unplug_acpi_device_test("net1", PCI_SLOT_HP);
 172     }
 173 }
 174
 175 static void announce_self(void *obj, void *data, QGuestAllocator *t_alloc)
 176 {
 177     int *sv = data;
 178     char buffer[60];
 179     int len;
 180     QDict *rsp;
 181     int ret;
 182     uint16_t *proto = (uint16_t *)&buffer[12];
 183
 184     rsp = qmp("{ 'execute' : 'announce-self', "
 185                   " 'arguments': {"
 186                       " 'initial': 50, 'max': 550,"
 187                       " 'rounds': 10, 'step': 50 } }");
 188     assert(!qdict_haskey(rsp, "error"));
 189     qobject_unref(rsp);
 190
 191     /* Catch the packet and make sure it's a RARP */
 192     ret = qemu_recv(sv[0], &len, sizeof(len), 0);
 193     g_assert_cmpint(ret, ==,  sizeof(len));
 194     len = ntohl(len);
 195
 196     ret = qemu_recv(sv[0], buffer, len, 0);
 197     g_assert_cmpint(*proto, ==, htons(ETH_P_RARP));
 198 }
 199
 200 static void virtio_net_test_cleanup(void *sockets)
 201 {
 202     int *sv = sockets;
 203
 204     close(sv[0]);
 205     qos_invalidate_command_line();
 206     close(sv[1]);
 207     g_free(sv);
 208 }
 209
 210 static void *virtio_net_test_setup(GString *cmd_line, void *arg)
 211 {
 212     int ret;
 213     int *sv = g_new(int, 2);
 214
 215     ret = socketpair(PF_UNIX, SOCK_STREAM, 0, sv);
 216     g_assert_cmpint(ret, !=, -1);
 217
 218     g_string_append_printf(cmd_line, " -netdev socket,fd=%d,id=hs0 ", sv[1]);
 219
 220     g_test_queue_destroy(virtio_net_test_cleanup, sv);
 221     return sv;
 222 }
 223
 224 static void large_tx(void *obj, void *data, QGuestAllocator *t_alloc)
 225 {
 226     QVirtioNet *dev = obj;
 227     QVirtQueue *vq = dev->queues[1];
 228     uint64_t req_addr;
 229     uint32_t free_head;
 230     size_t alloc_size = (size_t)data / 64;
 231     int i;
 232
 233     /* Bypass the limitation by pointing several descriptors to a single
 234      * smaller area */
 235     req_addr = guest_alloc(t_alloc, alloc_size);
 236     free_head = qvirtqueue_add(vq, req_addr, alloc_size, false, true);
 237
 238     for (i = 0; i < 64; i++) {
 239         qvirtqueue_add(vq, req_addr, alloc_size, false, i != 63);
 240     }
 241     qvirtqueue_kick(dev->vdev, vq, free_head);
 242
 243     qvirtio_wait_used_elem(dev->vdev, vq, free_head, NULL,
 244                            QVIRTIO_NET_TIMEOUT_US);
 245     guest_free(t_alloc, req_addr);
 246 }
 247
 248 static void *virtio_net_test_setup_nosocket(GString *cmd_line, void *arg)
 249 {
 250     g_string_append(cmd_line, " -netdev hubport,hubid=0,id=hs0 ");
 251     return arg;
 252 }
 253
 254 static void register_virtio_net_test(void)
 255 {
 256     QOSGraphTestOptions opts = {
 257         .before = virtio_net_test_setup,
 258     };
 259
 260     qos_add_test("hotplug", "virtio-pci", hotplug, &opts);
 261 #ifndef _WIN32
 262     qos_add_test("basic", "virtio-net", send_recv_test, &opts);
 263     qos_add_test("rx_stop_cont", "virtio-net", stop_cont_test, &opts);
 264 #endif
 265     qos_add_test("announce-self", "virtio-net", announce_self, &opts);
 266
 267     /* These tests do not need a loopback backend.  */
 268     opts.before = virtio_net_test_setup_nosocket;
 269     opts.arg = (gpointer)UINT_MAX;
 270     qos_add_test("large_tx/uint_max", "virtio-net", large_tx, &opts);
 271     opts.arg = (gpointer)NET_BUFSIZE;
 272     qos_add_test("large_tx/net_bufsize", "virtio-net", large_tx, &opts);
 273 }
 274
 275 libqos_init(register_virtio_net_test);