| 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 "qobject/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_cmpint(ret, ==, len); |
| 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 | static void hotplug(void *obj, void *data, QGuestAllocator *t_alloc) |
| 170 | { |
| 171 | QVirtioPCIDevice *dev = obj; |
| 172 | QTestState *qts = dev->pdev->bus->qts; |
| 173 | const char *arch = qtest_get_arch(); |
| 174 | |
| 175 | if (dev->pdev->bus->not_hotpluggable) { |
| 176 | g_test_skip("pci bus does not support hotplug"); |
| 177 | return; |
| 178 | } |
| 179 | |
| 180 | qtest_qmp_device_add(qts, "virtio-net-pci", "net1", |
| 181 | "{'addr': %s}", stringify(PCI_SLOT_HP)); |
| 182 | |
| 183 | if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) { |
| 184 | qpci_unplug_acpi_device_test(qts, "net1", PCI_SLOT_HP); |
| 185 | } |
| 186 | } |
| 187 | |
| 188 | static void announce_self(void *obj, void *data, QGuestAllocator *t_alloc) |
| 189 | { |
| 190 | int *sv = data; |
| 191 | char buffer[60]; |
| 192 | int len; |
| 193 | QDict *rsp; |
| 194 | int ret; |
| 195 | uint16_t *proto = (uint16_t *)&buffer[12]; |
| 196 | size_t total_received = 0; |
| 197 | uint64_t start, now, last_rxt, deadline; |
| 198 | |
| 199 | /* Send a set of packets over a few second period */ |
| 200 | rsp = qmp("{ 'execute' : 'announce-self', " |
| 201 | " 'arguments': {" |
| 202 | " 'initial': 20, 'max': 100," |
| 203 | " 'rounds': 300, 'step': 10, 'id': 'bob' } }"); |
| 204 | assert(!qdict_haskey(rsp, "error")); |
| 205 | qobject_unref(rsp); |
| 206 | |
| 207 | /* Catch the first packet and make sure it's a RARP */ |
| 208 | ret = recv(sv[0], &len, sizeof(len), 0); |
| 209 | g_assert_cmpint(ret, ==, sizeof(len)); |
| 210 | len = ntohl(len); |
| 211 | |
| 212 | ret = recv(sv[0], buffer, len, 0); |
| 213 | g_assert_cmpint(*proto, ==, htons(ETH_P_RARP)); |
| 214 | |
| 215 | /* |
| 216 | * Stop the announcement by settings rounds to 0 on the |
| 217 | * existing timer. |
| 218 | */ |
| 219 | rsp = qmp("{ 'execute' : 'announce-self', " |
| 220 | " 'arguments': {" |
| 221 | " 'initial': 20, 'max': 100," |
| 222 | " 'rounds': 0, 'step': 10, 'id': 'bob' } }"); |
| 223 | assert(!qdict_haskey(rsp, "error")); |
| 224 | qobject_unref(rsp); |
| 225 | |
| 226 | /* Now make sure the packets stop */ |
| 227 | |
| 228 | /* Times are in us */ |
| 229 | start = g_get_monotonic_time(); |
| 230 | /* 30 packets, max gap 100ms, * 4 for wiggle */ |
| 231 | deadline = start + 1000 * (100 * 30 * 4); |
| 232 | last_rxt = start; |
| 233 | |
| 234 | while (true) { |
| 235 | int saved_err; |
| 236 | ret = recv(sv[0], buffer, 60, MSG_DONTWAIT); |
| 237 | saved_err = errno; |
| 238 | now = g_get_monotonic_time(); |
| 239 | g_assert_cmpint(now, <, deadline); |
| 240 | |
| 241 | if (ret >= 0) { |
| 242 | if (ret) { |
| 243 | last_rxt = now; |
| 244 | } |
| 245 | total_received += ret; |
| 246 | |
| 247 | /* Check it's not spewing loads */ |
| 248 | g_assert_cmpint(total_received, <, 60 * 30 * 2); |
| 249 | } else { |
| 250 | g_assert_cmpint(saved_err, ==, EAGAIN); |
| 251 | |
| 252 | /* 400ms, i.e. 4 worst case gaps */ |
| 253 | if ((now - last_rxt) > (1000 * 100 * 4)) { |
| 254 | /* Nothings arrived for a while - must have stopped */ |
| 255 | break; |
| 256 | }; |
| 257 | |
| 258 | /* 100ms */ |
| 259 | g_usleep(1000 * 100); |
| 260 | } |
| 261 | }; |
| 262 | } |
| 263 | |
| 264 | static void virtio_net_test_cleanup(void *sockets) |
| 265 | { |
| 266 | int *sv = sockets; |
| 267 | |
| 268 | close(sv[0]); |
| 269 | qos_invalidate_command_line(); |
| 270 | close(sv[1]); |
| 271 | g_free(sv); |
| 272 | } |
| 273 | |
| 274 | static void *virtio_net_test_setup(GString *cmd_line, void *arg) |
| 275 | { |
| 276 | int ret; |
| 277 | int *sv = g_new(int, 2); |
| 278 | |
| 279 | ret = socketpair(PF_UNIX, SOCK_STREAM, 0, sv); |
| 280 | g_assert_cmpint(ret, !=, -1); |
| 281 | |
| 282 | g_string_append_printf(cmd_line, " -netdev socket,fd=%d,id=hs0 ", sv[1]); |
| 283 | |
| 284 | g_test_queue_destroy(virtio_net_test_cleanup, sv); |
| 285 | return sv; |
| 286 | } |
| 287 | |
| 288 | #endif /* _WIN32 */ |
| 289 | |
| 290 | static void large_tx(void *obj, void *data, QGuestAllocator *t_alloc) |
| 291 | { |
| 292 | QVirtioNet *dev = obj; |
| 293 | QVirtQueue *vq = dev->queues[1]; |
| 294 | uint64_t req_addr; |
| 295 | uint32_t free_head; |
| 296 | size_t alloc_size = (size_t)data / 64; |
| 297 | QTestState *qts = global_qtest; |
| 298 | int i; |
| 299 | |
| 300 | /* Bypass the limitation by pointing several descriptors to a single |
| 301 | * smaller area */ |
| 302 | req_addr = guest_alloc(t_alloc, alloc_size); |
| 303 | free_head = qvirtqueue_add(qts, vq, req_addr, alloc_size, false, true); |
| 304 | |
| 305 | for (i = 0; i < 64; i++) { |
| 306 | qvirtqueue_add(qts, vq, req_addr, alloc_size, false, i != 63); |
| 307 | } |
| 308 | qvirtqueue_kick(qts, dev->vdev, vq, free_head); |
| 309 | |
| 310 | qvirtio_wait_used_elem(qts, dev->vdev, vq, free_head, NULL, |
| 311 | QVIRTIO_NET_TIMEOUT_US); |
| 312 | guest_free(t_alloc, req_addr); |
| 313 | } |
| 314 | |
| 315 | static void *virtio_net_test_setup_nosocket(GString *cmd_line, void *arg) |
| 316 | { |
| 317 | g_string_append(cmd_line, " -netdev hubport,hubid=0,id=hs0 "); |
| 318 | return arg; |
| 319 | } |
| 320 | |
| 321 | static void register_virtio_net_test(void) |
| 322 | { |
| 323 | QOSGraphTestOptions opts = { 0 }; |
| 324 | |
| 325 | #ifndef _WIN32 |
| 326 | opts.before = virtio_net_test_setup; |
| 327 | qos_add_test("hotplug", "virtio-net-pci", hotplug, &opts); |
| 328 | qos_add_test("basic", "virtio-net", send_recv_test, &opts); |
| 329 | qos_add_test("rx_stop_cont", "virtio-net", stop_cont_test, &opts); |
| 330 | qos_add_test("announce-self", "virtio-net", announce_self, &opts); |
| 331 | #endif |
| 332 | |
| 333 | /* These tests do not need a loopback backend. */ |
| 334 | opts.before = virtio_net_test_setup_nosocket; |
| 335 | opts.arg = (gpointer)UINT_MAX; |
| 336 | qos_add_test("large_tx/uint_max", "virtio-net", large_tx, &opts); |
| 337 | opts.arg = (gpointer)NET_BUFSIZE; |
| 338 | qos_add_test("large_tx/net_bufsize", "virtio-net", large_tx, &opts); |
| 339 | } |
| 340 | |
| 341 | libqos_init(register_virtio_net_test); |