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 #endif 169 170 static void hotplug(void *obj, void *data, QGuestAllocator *t_alloc) 171 { 172 QVirtioPCIDevice *dev = obj; 173 QTestState *qts = dev->pdev->bus->qts; 174 const char *arch = qtest_get_arch(); 175 176 qtest_qmp_device_add(qts, "virtio-net-pci", "net1", 177 "{'addr': %s}", stringify(PCI_SLOT_HP)); 178 179 if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) { 180 qpci_unplug_acpi_device_test(qts, "net1", PCI_SLOT_HP); 181 } 182 } 183 184 static void announce_self(void *obj, void *data, QGuestAllocator *t_alloc) 185 { 186 int *sv = data; 187 char buffer[60]; 188 int len; 189 QDict *rsp; 190 int ret; 191 uint16_t *proto = (uint16_t *)&buffer[12]; 192 size_t total_received = 0; 193 uint64_t start, now, last_rxt, deadline; 194 195 /* Send a set of packets over a few second period */ 196 rsp = qmp("{ 'execute' : 'announce-self', " 197 " 'arguments': {" 198 " 'initial': 20, 'max': 100," 199 " 'rounds': 300, 'step': 10, 'id': 'bob' } }"); 200 assert(!qdict_haskey(rsp, "error")); 201 qobject_unref(rsp); 202 203 /* Catch the first packet and make sure it's a RARP */ 204 ret = recv(sv[0], &len, sizeof(len), 0); 205 g_assert_cmpint(ret, ==, sizeof(len)); 206 len = ntohl(len); 207 208 ret = recv(sv[0], buffer, len, 0); 209 g_assert_cmpint(*proto, ==, htons(ETH_P_RARP)); 210 211 /* 212 * Stop the announcment by settings rounds to 0 on the 213 * existing timer. 214 */ 215 rsp = qmp("{ 'execute' : 'announce-self', " 216 " 'arguments': {" 217 " 'initial': 20, 'max': 100," 218 " 'rounds': 0, 'step': 10, 'id': 'bob' } }"); 219 assert(!qdict_haskey(rsp, "error")); 220 qobject_unref(rsp); 221 222 /* Now make sure the packets stop */ 223 224 /* Times are in us */ 225 start = g_get_monotonic_time(); 226 /* 30 packets, max gap 100ms, * 4 for wiggle */ 227 deadline = start + 1000 * (100 * 30 * 4); 228 last_rxt = start; 229 230 while (true) { 231 int saved_err; 232 ret = recv(sv[0], buffer, 60, MSG_DONTWAIT); 233 saved_err = errno; 234 now = g_get_monotonic_time(); 235 g_assert_cmpint(now, <, deadline); 236 237 if (ret >= 0) { 238 if (ret) { 239 last_rxt = now; 240 } 241 total_received += ret; 242 243 /* Check it's not spewing loads */ 244 g_assert_cmpint(total_received, <, 60 * 30 * 2); 245 } else { 246 g_assert_cmpint(saved_err, ==, EAGAIN); 247 248 /* 400ms, i.e. 4 worst case gaps */ 249 if ((now - last_rxt) > (1000 * 100 * 4)) { 250 /* Nothings arrived for a while - must have stopped */ 251 break; 252 }; 253 254 /* 100ms */ 255 g_usleep(1000 * 100); 256 } 257 }; 258 } 259 260 static void virtio_net_test_cleanup(void *sockets) 261 { 262 int *sv = sockets; 263 264 close(sv[0]); 265 qos_invalidate_command_line(); 266 close(sv[1]); 267 g_free(sv); 268 } 269 270 static void *virtio_net_test_setup(GString *cmd_line, void *arg) 271 { 272 int ret; 273 int *sv = g_new(int, 2); 274 275 ret = socketpair(PF_UNIX, SOCK_STREAM, 0, sv); 276 g_assert_cmpint(ret, !=, -1); 277 278 g_string_append_printf(cmd_line, " -netdev socket,fd=%d,id=hs0 ", sv[1]); 279 280 g_test_queue_destroy(virtio_net_test_cleanup, sv); 281 return sv; 282 } 283 284 static void large_tx(void *obj, void *data, QGuestAllocator *t_alloc) 285 { 286 QVirtioNet *dev = obj; 287 QVirtQueue *vq = dev->queues[1]; 288 uint64_t req_addr; 289 uint32_t free_head; 290 size_t alloc_size = (size_t)data / 64; 291 QTestState *qts = global_qtest; 292 int i; 293 294 /* Bypass the limitation by pointing several descriptors to a single 295 * smaller area */ 296 req_addr = guest_alloc(t_alloc, alloc_size); 297 free_head = qvirtqueue_add(qts, vq, req_addr, alloc_size, false, true); 298 299 for (i = 0; i < 64; i++) { 300 qvirtqueue_add(qts, vq, req_addr, alloc_size, false, i != 63); 301 } 302 qvirtqueue_kick(qts, dev->vdev, vq, free_head); 303 304 qvirtio_wait_used_elem(qts, dev->vdev, vq, free_head, NULL, 305 QVIRTIO_NET_TIMEOUT_US); 306 guest_free(t_alloc, req_addr); 307 } 308 309 static void *virtio_net_test_setup_nosocket(GString *cmd_line, void *arg) 310 { 311 g_string_append(cmd_line, " -netdev hubport,hubid=0,id=hs0 "); 312 return arg; 313 } 314 315 static void register_virtio_net_test(void) 316 { 317 QOSGraphTestOptions opts = { 318 .before = virtio_net_test_setup, 319 }; 320 321 qos_add_test("hotplug", "virtio-net-pci", hotplug, &opts); 322 #ifndef _WIN32 323 qos_add_test("basic", "virtio-net", send_recv_test, &opts); 324 qos_add_test("rx_stop_cont", "virtio-net", stop_cont_test, &opts); 325 #endif 326 qos_add_test("announce-self", "virtio-net", announce_self, &opts); 327 328 /* These tests do not need a loopback backend. */ 329 opts.before = virtio_net_test_setup_nosocket; 330 opts.arg = (gpointer)UINT_MAX; 331 qos_add_test("large_tx/uint_max", "virtio-net", large_tx, &opts); 332 opts.arg = (gpointer)NET_BUFSIZE; 333 qos_add_test("large_tx/net_bufsize", "virtio-net", large_tx, &opts); 334 } 335 336 libqos_init(register_virtio_net_test); 337