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