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_cmpstr(buffer, ==, "TEST"); 95 } 96 97 static void rx_stop_cont_test(QVirtioDevice *dev, 98 QGuestAllocator *alloc, QVirtQueue *vq, 99 int socket) 100 { 101 QTestState *qts = global_qtest; 102 uint64_t req_addr; 103 uint32_t free_head; 104 char test[] = "TEST"; 105 char buffer[64]; 106 int len = htonl(sizeof(test)); 107 QDict *rsp; 108 struct iovec iov[] = { 109 { 110 .iov_base = &len, 111 .iov_len = sizeof(len), 112 }, { 113 .iov_base = test, 114 .iov_len = sizeof(test), 115 }, 116 }; 117 int ret; 118 119 req_addr = guest_alloc(alloc, 64); 120 121 free_head = qvirtqueue_add(qts, vq, req_addr, 64, true, false); 122 qvirtqueue_kick(qts, dev, vq, free_head); 123 124 rsp = qmp("{ 'execute' : 'stop'}"); 125 qobject_unref(rsp); 126 127 ret = iov_send(socket, iov, 2, 0, sizeof(len) + sizeof(test)); 128 g_assert_cmpint(ret, ==, sizeof(test) + sizeof(len)); 129 130 /* We could check the status, but this command is more importantly to 131 * ensure the packet data gets queued in QEMU, before we do 'cont'. 132 */ 133 rsp = qmp("{ 'execute' : 'query-status'}"); 134 qobject_unref(rsp); 135 rsp = qmp("{ 'execute' : 'cont'}"); 136 qobject_unref(rsp); 137 138 qvirtio_wait_used_elem(qts, dev, vq, free_head, NULL, 139 QVIRTIO_NET_TIMEOUT_US); 140 memread(req_addr + VNET_HDR_SIZE, buffer, sizeof(test)); 141 g_assert_cmpstr(buffer, ==, "TEST"); 142 143 guest_free(alloc, req_addr); 144 } 145 146 static void send_recv_test(void *obj, void *data, QGuestAllocator *t_alloc) 147 { 148 QVirtioNet *net_if = obj; 149 QVirtioDevice *dev = net_if->vdev; 150 QVirtQueue *rx = net_if->queues[0]; 151 QVirtQueue *tx = net_if->queues[1]; 152 int *sv = data; 153 154 rx_test(dev, t_alloc, rx, sv[0]); 155 tx_test(dev, t_alloc, tx, sv[0]); 156 } 157 158 static void stop_cont_test(void *obj, void *data, QGuestAllocator *t_alloc) 159 { 160 QVirtioNet *net_if = obj; 161 QVirtioDevice *dev = net_if->vdev; 162 QVirtQueue *rx = net_if->queues[0]; 163 int *sv = data; 164 165 rx_stop_cont_test(dev, t_alloc, rx, sv[0]); 166 } 167 168 static void hotplug(void *obj, void *data, QGuestAllocator *t_alloc) 169 { 170 QVirtioPCIDevice *dev = obj; 171 QTestState *qts = dev->pdev->bus->qts; 172 const char *arch = qtest_get_arch(); 173 174 if (dev->pdev->bus->not_hotpluggable) { 175 g_test_skip("pci bus does not support hotplug"); 176 return; 177 } 178 179 qtest_qmp_device_add(qts, "virtio-net-pci", "net1", 180 "{'addr': %s}", stringify(PCI_SLOT_HP)); 181 182 if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) { 183 qpci_unplug_acpi_device_test(qts, "net1", PCI_SLOT_HP); 184 } 185 } 186 187 static void announce_self(void *obj, void *data, QGuestAllocator *t_alloc) 188 { 189 int *sv = data; 190 char buffer[60]; 191 int len; 192 QDict *rsp; 193 int ret; 194 uint16_t *proto = (uint16_t *)&buffer[12]; 195 size_t total_received = 0; 196 uint64_t start, now, last_rxt, deadline; 197 198 /* Send a set of packets over a few second period */ 199 rsp = qmp("{ 'execute' : 'announce-self', " 200 " 'arguments': {" 201 " 'initial': 20, 'max': 100," 202 " 'rounds': 300, 'step': 10, 'id': 'bob' } }"); 203 assert(!qdict_haskey(rsp, "error")); 204 qobject_unref(rsp); 205 206 /* Catch the first packet and make sure it's a RARP */ 207 ret = recv(sv[0], &len, sizeof(len), 0); 208 g_assert_cmpint(ret, ==, sizeof(len)); 209 len = ntohl(len); 210 211 ret = recv(sv[0], buffer, len, 0); 212 g_assert_cmpint(*proto, ==, htons(ETH_P_RARP)); 213 214 /* 215 * Stop the announcement by settings rounds to 0 on the 216 * existing timer. 217 */ 218 rsp = qmp("{ 'execute' : 'announce-self', " 219 " 'arguments': {" 220 " 'initial': 20, 'max': 100," 221 " 'rounds': 0, 'step': 10, 'id': 'bob' } }"); 222 assert(!qdict_haskey(rsp, "error")); 223 qobject_unref(rsp); 224 225 /* Now make sure the packets stop */ 226 227 /* Times are in us */ 228 start = g_get_monotonic_time(); 229 /* 30 packets, max gap 100ms, * 4 for wiggle */ 230 deadline = start + 1000 * (100 * 30 * 4); 231 last_rxt = start; 232 233 while (true) { 234 int saved_err; 235 ret = recv(sv[0], buffer, 60, MSG_DONTWAIT); 236 saved_err = errno; 237 now = g_get_monotonic_time(); 238 g_assert_cmpint(now, <, deadline); 239 240 if (ret >= 0) { 241 if (ret) { 242 last_rxt = now; 243 } 244 total_received += ret; 245 246 /* Check it's not spewing loads */ 247 g_assert_cmpint(total_received, <, 60 * 30 * 2); 248 } else { 249 g_assert_cmpint(saved_err, ==, EAGAIN); 250 251 /* 400ms, i.e. 4 worst case gaps */ 252 if ((now - last_rxt) > (1000 * 100 * 4)) { 253 /* Nothings arrived for a while - must have stopped */ 254 break; 255 }; 256 257 /* 100ms */ 258 g_usleep(1000 * 100); 259 } 260 }; 261 } 262 263 static void virtio_net_test_cleanup(void *sockets) 264 { 265 int *sv = sockets; 266 267 close(sv[0]); 268 qos_invalidate_command_line(); 269 close(sv[1]); 270 g_free(sv); 271 } 272 273 static void *virtio_net_test_setup(GString *cmd_line, void *arg) 274 { 275 int ret; 276 int *sv = g_new(int, 2); 277 278 ret = socketpair(PF_UNIX, SOCK_STREAM, 0, sv); 279 g_assert_cmpint(ret, !=, -1); 280 281 g_string_append_printf(cmd_line, " -netdev socket,fd=%d,id=hs0 ", sv[1]); 282 283 g_test_queue_destroy(virtio_net_test_cleanup, sv); 284 return sv; 285 } 286 287 #endif /* _WIN32 */ 288 289 static void large_tx(void *obj, void *data, QGuestAllocator *t_alloc) 290 { 291 QVirtioNet *dev = obj; 292 QVirtQueue *vq = dev->queues[1]; 293 uint64_t req_addr; 294 uint32_t free_head; 295 size_t alloc_size = (size_t)data / 64; 296 QTestState *qts = global_qtest; 297 int i; 298 299 /* Bypass the limitation by pointing several descriptors to a single 300 * smaller area */ 301 req_addr = guest_alloc(t_alloc, alloc_size); 302 free_head = qvirtqueue_add(qts, vq, req_addr, alloc_size, false, true); 303 304 for (i = 0; i < 64; i++) { 305 qvirtqueue_add(qts, vq, req_addr, alloc_size, false, i != 63); 306 } 307 qvirtqueue_kick(qts, dev->vdev, vq, free_head); 308 309 qvirtio_wait_used_elem(qts, dev->vdev, vq, free_head, NULL, 310 QVIRTIO_NET_TIMEOUT_US); 311 guest_free(t_alloc, req_addr); 312 } 313 314 static void *virtio_net_test_setup_nosocket(GString *cmd_line, void *arg) 315 { 316 g_string_append(cmd_line, " -netdev hubport,hubid=0,id=hs0 "); 317 return arg; 318 } 319 320 static void register_virtio_net_test(void) 321 { 322 QOSGraphTestOptions opts = { 0 }; 323 324 #ifndef _WIN32 325 opts.before = virtio_net_test_setup; 326 qos_add_test("hotplug", "virtio-net-pci", hotplug, &opts); 327 qos_add_test("basic", "virtio-net", send_recv_test, &opts); 328 qos_add_test("rx_stop_cont", "virtio-net", stop_cont_test, &opts); 329 qos_add_test("announce-self", "virtio-net", announce_self, &opts); 330 #endif 331 332 /* These tests do not need a loopback backend. */ 333 opts.before = virtio_net_test_setup_nosocket; 334 opts.arg = (gpointer)UINT_MAX; 335 qos_add_test("large_tx/uint_max", "virtio-net", large_tx, &opts); 336 opts.arg = (gpointer)NET_BUFSIZE; 337 qos_add_test("large_tx/net_bufsize", "virtio-net", large_tx, &opts); 338 } 339 340 libqos_init(register_virtio_net_test); 341