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 "qapi/qmp/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); 342