| 1 | /* |
| 2 | * QEMU System Emulator |
| 3 | * |
| 4 | * Copyright (c) 2003-2008 Fabrice Bellard |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 7 | * of this software and associated documentation files (the "Software"), to deal |
| 8 | * in the Software without restriction, including without limitation the rights |
| 9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 10 | * copies of the Software, and to permit persons to whom the Software is |
| 11 | * furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in |
| 14 | * all copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 22 | * THE SOFTWARE. |
| 23 | */ |
| 24 | |
| 25 | #include "qemu/osdep.h" |
| 26 | |
| 27 | #include "net/net.h" |
| 28 | #include "clients.h" |
| 29 | #include "hub.h" |
| 30 | #include "hw/core/qdev-properties.h" |
| 31 | #include "net/slirp.h" |
| 32 | #include "net/eth.h" |
| 33 | #include "util.h" |
| 34 | |
| 35 | #include "monitor/monitor.h" |
| 36 | #include "qemu/help_option.h" |
| 37 | #include "qapi/qapi-commands-net.h" |
| 38 | #include "qapi/qapi-visit-net.h" |
| 39 | #include "qobject/qdict.h" |
| 40 | #include "qapi/qmp/qerror.h" |
| 41 | #include "qemu/error-report.h" |
| 42 | #include "qemu/mem-reentrancy.h" |
| 43 | #include "qemu/sockets.h" |
| 44 | #include "qemu/cutils.h" |
| 45 | #include "qemu/config-file.h" |
| 46 | #include "qemu/ctype.h" |
| 47 | #include "qemu/id.h" |
| 48 | #include "qemu/iov.h" |
| 49 | #include "qemu/qemu-print.h" |
| 50 | #include "qemu/main-loop.h" |
| 51 | #include "qemu/option.h" |
| 52 | #include "qemu/keyval.h" |
| 53 | #include "qapi/error.h" |
| 54 | #include "qapi/opts-visitor.h" |
| 55 | #include "system/runstate.h" |
| 56 | #include "net/colo-compare.h" |
| 57 | #include "net/filter.h" |
| 58 | #include "qapi/string-output-visitor.h" |
| 59 | #include "qapi/qobject-input-visitor.h" |
| 60 | #include "standard-headers/linux/virtio_net.h" |
| 61 | |
| 62 | /* Net bridge is currently not supported for W32. */ |
| 63 | #if !defined(_WIN32) |
| 64 | # define CONFIG_NET_BRIDGE |
| 65 | #endif |
| 66 | |
| 67 | static VMChangeStateEntry *net_change_state_entry; |
| 68 | NetClientStateList net_clients; |
| 69 | |
| 70 | typedef struct NetdevQueueEntry { |
| 71 | Netdev *nd; |
| 72 | Location loc; |
| 73 | QSIMPLEQ_ENTRY(NetdevQueueEntry) entry; |
| 74 | } NetdevQueueEntry; |
| 75 | |
| 76 | typedef QSIMPLEQ_HEAD(, NetdevQueueEntry) NetdevQueue; |
| 77 | |
| 78 | static NetdevQueue nd_queue = QSIMPLEQ_HEAD_INITIALIZER(nd_queue); |
| 79 | |
| 80 | static GHashTable *nic_model_help; |
| 81 | |
| 82 | static int nb_nics; |
| 83 | static NICInfo nd_table[MAX_NICS]; |
| 84 | |
| 85 | /***********************************************************/ |
| 86 | /* network device redirectors */ |
| 87 | |
| 88 | int convert_host_port(struct sockaddr_in *saddr, const char *host, |
| 89 | const char *port, Error **errp) |
| 90 | { |
| 91 | struct hostent *he; |
| 92 | const char *r; |
| 93 | long p; |
| 94 | |
| 95 | memset(saddr, 0, sizeof(*saddr)); |
| 96 | |
| 97 | saddr->sin_family = AF_INET; |
| 98 | if (host[0] == '\0') { |
| 99 | saddr->sin_addr.s_addr = 0; |
| 100 | } else { |
| 101 | if (qemu_isdigit(host[0])) { |
| 102 | if (!inet_aton(host, &saddr->sin_addr)) { |
| 103 | error_setg(errp, "host address '%s' is not a valid " |
| 104 | "IPv4 address", host); |
| 105 | return -1; |
| 106 | } |
| 107 | } else { |
| 108 | he = gethostbyname(host); |
| 109 | if (he == NULL) { |
| 110 | error_setg(errp, "can't resolve host address '%s'", host); |
| 111 | return -1; |
| 112 | } |
| 113 | saddr->sin_addr = *(struct in_addr *)he->h_addr; |
| 114 | } |
| 115 | } |
| 116 | if (qemu_strtol(port, &r, 0, &p) != 0) { |
| 117 | error_setg(errp, "port number '%s' is invalid", port); |
| 118 | return -1; |
| 119 | } |
| 120 | saddr->sin_port = htons(p); |
| 121 | return 0; |
| 122 | } |
| 123 | |
| 124 | int parse_host_port(struct sockaddr_in *saddr, const char *str, |
| 125 | Error **errp) |
| 126 | { |
| 127 | gchar **substrings; |
| 128 | int ret; |
| 129 | |
| 130 | substrings = g_strsplit(str, ":", 2); |
| 131 | if (!substrings || !substrings[0] || !substrings[1]) { |
| 132 | error_setg(errp, "host address '%s' doesn't contain ':' " |
| 133 | "separating host from port", str); |
| 134 | ret = -1; |
| 135 | goto out; |
| 136 | } |
| 137 | |
| 138 | ret = convert_host_port(saddr, substrings[0], substrings[1], errp); |
| 139 | |
| 140 | out: |
| 141 | g_strfreev(substrings); |
| 142 | return ret; |
| 143 | } |
| 144 | |
| 145 | char *qemu_mac_strdup_printf(const uint8_t *macaddr) |
| 146 | { |
| 147 | return g_strdup_printf("%.2x:%.2x:%.2x:%.2x:%.2x:%.2x", |
| 148 | macaddr[0], macaddr[1], macaddr[2], |
| 149 | macaddr[3], macaddr[4], macaddr[5]); |
| 150 | } |
| 151 | |
| 152 | void qemu_set_info_str(NetClientState *nc, const char *fmt, ...) |
| 153 | { |
| 154 | va_list ap; |
| 155 | |
| 156 | va_start(ap, fmt); |
| 157 | vsnprintf(nc->info_str, sizeof(nc->info_str), fmt, ap); |
| 158 | va_end(ap); |
| 159 | } |
| 160 | |
| 161 | void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6]) |
| 162 | { |
| 163 | qemu_set_info_str(nc, "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x", |
| 164 | nc->model, macaddr[0], macaddr[1], macaddr[2], |
| 165 | macaddr[3], macaddr[4], macaddr[5]); |
| 166 | } |
| 167 | |
| 168 | static int mac_table[256] = {0}; |
| 169 | |
| 170 | static void qemu_macaddr_set_used(MACAddr *macaddr) |
| 171 | { |
| 172 | int index; |
| 173 | |
| 174 | for (index = 0x56; index < 0xFF; index++) { |
| 175 | if (macaddr->a[5] == index) { |
| 176 | mac_table[index]++; |
| 177 | } |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | static void qemu_macaddr_set_free(MACAddr *macaddr) |
| 182 | { |
| 183 | int index; |
| 184 | static const MACAddr base = { .a = { 0x52, 0x54, 0x00, 0x12, 0x34, 0 } }; |
| 185 | |
| 186 | if (memcmp(macaddr->a, &base.a, (sizeof(base.a) - 1)) != 0) { |
| 187 | return; |
| 188 | } |
| 189 | for (index = 0x56; index < 0xFF; index++) { |
| 190 | if (macaddr->a[5] == index) { |
| 191 | mac_table[index]--; |
| 192 | } |
| 193 | } |
| 194 | } |
| 195 | |
| 196 | static int qemu_macaddr_get_free(void) |
| 197 | { |
| 198 | int index; |
| 199 | |
| 200 | for (index = 0x56; index < 0xFF; index++) { |
| 201 | if (mac_table[index] == 0) { |
| 202 | return index; |
| 203 | } |
| 204 | } |
| 205 | |
| 206 | return -1; |
| 207 | } |
| 208 | |
| 209 | void qemu_macaddr_default_if_unset(MACAddr *macaddr) |
| 210 | { |
| 211 | static const MACAddr zero = { .a = { 0,0,0,0,0,0 } }; |
| 212 | static const MACAddr base = { .a = { 0x52, 0x54, 0x00, 0x12, 0x34, 0 } }; |
| 213 | |
| 214 | if (memcmp(macaddr, &zero, sizeof(zero)) != 0) { |
| 215 | if (memcmp(macaddr->a, &base.a, (sizeof(base.a) - 1)) != 0) { |
| 216 | return; |
| 217 | } else { |
| 218 | qemu_macaddr_set_used(macaddr); |
| 219 | return; |
| 220 | } |
| 221 | } |
| 222 | |
| 223 | macaddr->a[0] = 0x52; |
| 224 | macaddr->a[1] = 0x54; |
| 225 | macaddr->a[2] = 0x00; |
| 226 | macaddr->a[3] = 0x12; |
| 227 | macaddr->a[4] = 0x34; |
| 228 | macaddr->a[5] = qemu_macaddr_get_free(); |
| 229 | qemu_macaddr_set_used(macaddr); |
| 230 | } |
| 231 | |
| 232 | /** |
| 233 | * Generate a name for net client |
| 234 | * |
| 235 | * Only net clients created with the legacy -net option and NICs need this. |
| 236 | */ |
| 237 | static char *assign_name(NetClientState *nc1, const char *model) |
| 238 | { |
| 239 | NetClientState *nc; |
| 240 | int id = 0; |
| 241 | |
| 242 | QTAILQ_FOREACH(nc, &net_clients, next) { |
| 243 | if (nc == nc1) { |
| 244 | continue; |
| 245 | } |
| 246 | if (strcmp(nc->model, model) == 0) { |
| 247 | id++; |
| 248 | } |
| 249 | } |
| 250 | |
| 251 | return g_strdup_printf("%s.%d", model, id); |
| 252 | } |
| 253 | |
| 254 | static void qemu_net_client_destructor(NetClientState *nc) |
| 255 | { |
| 256 | g_free(nc); |
| 257 | } |
| 258 | static ssize_t qemu_deliver_packet_iov(NetClientState *sender, |
| 259 | unsigned flags, |
| 260 | const struct iovec *iov, |
| 261 | int iovcnt, |
| 262 | void *opaque); |
| 263 | |
| 264 | static void qemu_net_client_setup(NetClientState *nc, |
| 265 | NetClientInfo *info, |
| 266 | NetClientState *peer, |
| 267 | const char *model, |
| 268 | const char *name, |
| 269 | NetClientDestructor *destructor, |
| 270 | bool is_datapath) |
| 271 | { |
| 272 | nc->info = info; |
| 273 | nc->model = g_strdup(model); |
| 274 | if (name) { |
| 275 | nc->name = g_strdup(name); |
| 276 | } else { |
| 277 | nc->name = assign_name(nc, model); |
| 278 | } |
| 279 | |
| 280 | if (peer) { |
| 281 | assert(!peer->peer); |
| 282 | nc->peer = peer; |
| 283 | peer->peer = nc; |
| 284 | } |
| 285 | QTAILQ_INSERT_TAIL(&net_clients, nc, next); |
| 286 | |
| 287 | nc->incoming_queue = qemu_new_net_queue(qemu_deliver_packet_iov, nc); |
| 288 | nc->destructor = destructor; |
| 289 | nc->is_datapath = is_datapath; |
| 290 | QTAILQ_INIT(&nc->filters); |
| 291 | } |
| 292 | |
| 293 | NetClientState *qemu_new_net_client(NetClientInfo *info, |
| 294 | NetClientState *peer, |
| 295 | const char *model, |
| 296 | const char *name) |
| 297 | { |
| 298 | NetClientState *nc; |
| 299 | |
| 300 | assert(info->size >= sizeof(NetClientState)); |
| 301 | |
| 302 | nc = g_malloc0(info->size); |
| 303 | qemu_net_client_setup(nc, info, peer, model, name, |
| 304 | qemu_net_client_destructor, true); |
| 305 | |
| 306 | return nc; |
| 307 | } |
| 308 | |
| 309 | NetClientState *qemu_new_net_control_client(NetClientInfo *info, |
| 310 | NetClientState *peer, |
| 311 | const char *model, |
| 312 | const char *name) |
| 313 | { |
| 314 | NetClientState *nc; |
| 315 | |
| 316 | assert(info->size >= sizeof(NetClientState)); |
| 317 | |
| 318 | nc = g_malloc0(info->size); |
| 319 | qemu_net_client_setup(nc, info, peer, model, name, |
| 320 | qemu_net_client_destructor, false); |
| 321 | |
| 322 | return nc; |
| 323 | } |
| 324 | |
| 325 | NICState *qemu_new_nic(NetClientInfo *info, |
| 326 | NICConf *conf, |
| 327 | const char *model, |
| 328 | const char *name, |
| 329 | MemReentrancyGuard *reentrancy_guard, |
| 330 | void *opaque) |
| 331 | { |
| 332 | NetClientState **peers = conf->peers.ncs; |
| 333 | NICState *nic; |
| 334 | int i, queues = MAX(1, conf->peers.queues); |
| 335 | |
| 336 | assert(info->type == NET_CLIENT_DRIVER_NIC); |
| 337 | assert(info->size >= sizeof(NICState)); |
| 338 | |
| 339 | nic = g_malloc0(info->size + sizeof(NetClientState) * queues); |
| 340 | nic->ncs = (void *)nic + info->size; |
| 341 | nic->conf = conf; |
| 342 | nic->reentrancy_guard = reentrancy_guard, |
| 343 | nic->opaque = opaque; |
| 344 | |
| 345 | for (i = 0; i < queues; i++) { |
| 346 | qemu_net_client_setup(&nic->ncs[i], info, peers[i], model, name, |
| 347 | NULL, true); |
| 348 | nic->ncs[i].queue_index = i; |
| 349 | } |
| 350 | |
| 351 | return nic; |
| 352 | } |
| 353 | |
| 354 | NetClientState *qemu_get_subqueue(NICState *nic, int queue_index) |
| 355 | { |
| 356 | return nic->ncs + queue_index; |
| 357 | } |
| 358 | |
| 359 | NetClientState *qemu_get_queue(NICState *nic) |
| 360 | { |
| 361 | return qemu_get_subqueue(nic, 0); |
| 362 | } |
| 363 | |
| 364 | NICState *qemu_get_nic(NetClientState *nc) |
| 365 | { |
| 366 | NetClientState *nc0 = nc - nc->queue_index; |
| 367 | |
| 368 | return (NICState *)((void *)nc0 - nc->info->size); |
| 369 | } |
| 370 | |
| 371 | void *qemu_get_nic_opaque(NetClientState *nc) |
| 372 | { |
| 373 | NICState *nic = qemu_get_nic(nc); |
| 374 | |
| 375 | return nic->opaque; |
| 376 | } |
| 377 | |
| 378 | NetClientState *qemu_get_peer(NetClientState *nc, int queue_index) |
| 379 | { |
| 380 | assert(nc != NULL); |
| 381 | NetClientState *ncs = nc + queue_index; |
| 382 | return ncs->peer; |
| 383 | } |
| 384 | |
| 385 | static void qemu_cleanup_net_client(NetClientState *nc, |
| 386 | bool remove_from_net_clients) |
| 387 | { |
| 388 | if (remove_from_net_clients) { |
| 389 | QTAILQ_REMOVE(&net_clients, nc, next); |
| 390 | } |
| 391 | |
| 392 | if (nc->info->cleanup) { |
| 393 | nc->info->cleanup(nc); |
| 394 | } |
| 395 | } |
| 396 | |
| 397 | static void qemu_free_net_client(NetClientState *nc) |
| 398 | { |
| 399 | if (nc->incoming_queue) { |
| 400 | qemu_del_net_queue(nc->incoming_queue); |
| 401 | } |
| 402 | if (nc->peer) { |
| 403 | nc->peer->peer = NULL; |
| 404 | } |
| 405 | g_free(nc->name); |
| 406 | g_free(nc->model); |
| 407 | if (nc->destructor) { |
| 408 | nc->destructor(nc); |
| 409 | } |
| 410 | } |
| 411 | |
| 412 | void qemu_del_net_client(NetClientState *nc) |
| 413 | { |
| 414 | NetClientState *ncs[MAX_QUEUE_NUM]; |
| 415 | int queues, i; |
| 416 | NetFilterState *nf, *next; |
| 417 | |
| 418 | assert(nc->info->type != NET_CLIENT_DRIVER_NIC); |
| 419 | |
| 420 | /* If the NetClientState belongs to a multiqueue backend, we will change all |
| 421 | * other NetClientStates also. |
| 422 | */ |
| 423 | queues = qemu_find_net_clients_except(nc->name, ncs, |
| 424 | NET_CLIENT_DRIVER_NIC, |
| 425 | MAX_QUEUE_NUM); |
| 426 | assert(queues != 0); |
| 427 | |
| 428 | QTAILQ_FOREACH_SAFE(nf, &nc->filters, next, next) { |
| 429 | object_unparent(OBJECT(nf)); |
| 430 | } |
| 431 | |
| 432 | /* |
| 433 | * If there is a peer NIC, transfer ownership to it. Delete the client |
| 434 | * from net_client list but do not cleanup nor free. This way NIC can |
| 435 | * still access to members of the backend. |
| 436 | * |
| 437 | * The cleanup and free will be done when the NIC is free. |
| 438 | */ |
| 439 | if (nc->peer && nc->peer->info->type == NET_CLIENT_DRIVER_NIC) { |
| 440 | NICState *nic = qemu_get_nic(nc->peer); |
| 441 | if (nic->peer_deleted) { |
| 442 | return; |
| 443 | } |
| 444 | nic->peer_deleted = true; |
| 445 | |
| 446 | for (i = 0; i < queues; i++) { |
| 447 | ncs[i]->peer->link_down = true; |
| 448 | QTAILQ_REMOVE(&net_clients, ncs[i], next); |
| 449 | } |
| 450 | |
| 451 | if (nc->peer->info->link_status_changed) { |
| 452 | nc->peer->info->link_status_changed(nc->peer); |
| 453 | } |
| 454 | |
| 455 | return; |
| 456 | } |
| 457 | |
| 458 | for (i = 0; i < queues; i++) { |
| 459 | qemu_cleanup_net_client(ncs[i], true); |
| 460 | qemu_free_net_client(ncs[i]); |
| 461 | } |
| 462 | } |
| 463 | |
| 464 | void qemu_del_nic(NICState *nic) |
| 465 | { |
| 466 | int i, queues = MAX(nic->conf->peers.queues, 1); |
| 467 | |
| 468 | qemu_macaddr_set_free(&nic->conf->macaddr); |
| 469 | |
| 470 | for (i = 0; i < queues; i++) { |
| 471 | NetClientState *nc = qemu_get_subqueue(nic, i); |
| 472 | /* |
| 473 | * If this is a peer NIC and peer has already been deleted, clean it up |
| 474 | * and free it now. |
| 475 | */ |
| 476 | if (nic->peer_deleted) { |
| 477 | qemu_cleanup_net_client(nc->peer, false); |
| 478 | qemu_free_net_client(nc->peer); |
| 479 | } else if (nc->peer) { |
| 480 | /* if there are RX packets pending, complete them */ |
| 481 | qemu_purge_queued_packets(nc->peer); |
| 482 | } |
| 483 | } |
| 484 | |
| 485 | for (i = queues - 1; i >= 0; i--) { |
| 486 | NetClientState *nc = qemu_get_subqueue(nic, i); |
| 487 | |
| 488 | qemu_cleanup_net_client(nc, true); |
| 489 | qemu_free_net_client(nc); |
| 490 | } |
| 491 | |
| 492 | g_free(nic); |
| 493 | } |
| 494 | |
| 495 | void qemu_foreach_nic(qemu_nic_foreach func, void *opaque) |
| 496 | { |
| 497 | NetClientState *nc; |
| 498 | |
| 499 | QTAILQ_FOREACH(nc, &net_clients, next) { |
| 500 | if (nc->info->type == NET_CLIENT_DRIVER_NIC) { |
| 501 | if (nc->queue_index == 0) { |
| 502 | func(qemu_get_nic(nc), opaque); |
| 503 | } |
| 504 | } |
| 505 | } |
| 506 | } |
| 507 | |
| 508 | bool qemu_has_ufo(NetClientState *nc) |
| 509 | { |
| 510 | if (!nc || !nc->info->has_ufo) { |
| 511 | return false; |
| 512 | } |
| 513 | |
| 514 | return nc->info->has_ufo(nc); |
| 515 | } |
| 516 | |
| 517 | bool qemu_has_uso(NetClientState *nc) |
| 518 | { |
| 519 | if (!nc || !nc->info->has_uso) { |
| 520 | return false; |
| 521 | } |
| 522 | |
| 523 | return nc->info->has_uso(nc); |
| 524 | } |
| 525 | |
| 526 | bool qemu_has_tunnel(NetClientState *nc) |
| 527 | { |
| 528 | if (!nc || !nc->info->has_tunnel) { |
| 529 | return false; |
| 530 | } |
| 531 | |
| 532 | return nc->info->has_tunnel(nc); |
| 533 | } |
| 534 | |
| 535 | bool qemu_has_vnet_hdr(NetClientState *nc) |
| 536 | { |
| 537 | if (!nc || !nc->info->has_vnet_hdr) { |
| 538 | return false; |
| 539 | } |
| 540 | |
| 541 | return nc->info->has_vnet_hdr(nc); |
| 542 | } |
| 543 | |
| 544 | bool qemu_has_vnet_hdr_len(NetClientState *nc, int len) |
| 545 | { |
| 546 | if (!nc || !nc->info->has_vnet_hdr_len) { |
| 547 | return false; |
| 548 | } |
| 549 | |
| 550 | return nc->info->has_vnet_hdr_len(nc, len); |
| 551 | } |
| 552 | |
| 553 | void qemu_set_offload(NetClientState *nc, const NetOffloads *ol) |
| 554 | { |
| 555 | if (!nc || !nc->info->set_offload) { |
| 556 | return; |
| 557 | } |
| 558 | |
| 559 | nc->info->set_offload(nc, ol); |
| 560 | } |
| 561 | |
| 562 | int qemu_get_vnet_hdr_len(NetClientState *nc) |
| 563 | { |
| 564 | if (!nc) { |
| 565 | return 0; |
| 566 | } |
| 567 | |
| 568 | return nc->vnet_hdr_len; |
| 569 | } |
| 570 | |
| 571 | void qemu_set_vnet_hdr_len(NetClientState *nc, int len) |
| 572 | { |
| 573 | if (!nc || !nc->info->set_vnet_hdr_len) { |
| 574 | return; |
| 575 | } |
| 576 | |
| 577 | assert(len == sizeof(struct virtio_net_hdr_mrg_rxbuf) || |
| 578 | len == sizeof(struct virtio_net_hdr) || |
| 579 | len == sizeof(struct virtio_net_hdr_v1_hash) || |
| 580 | len == sizeof(struct virtio_net_hdr_v1_hash_tunnel)); |
| 581 | |
| 582 | nc->vnet_hdr_len = len; |
| 583 | nc->info->set_vnet_hdr_len(nc, len); |
| 584 | } |
| 585 | |
| 586 | bool qemu_get_vnet_hash_supported_types(NetClientState *nc, uint32_t *types) |
| 587 | { |
| 588 | if (!nc || !nc->info->get_vnet_hash_supported_types) { |
| 589 | return false; |
| 590 | } |
| 591 | |
| 592 | return nc->info->get_vnet_hash_supported_types(nc, types); |
| 593 | } |
| 594 | |
| 595 | int qemu_set_vnet_le(NetClientState *nc, bool is_le) |
| 596 | { |
| 597 | #if HOST_BIG_ENDIAN |
| 598 | if (!nc || !nc->info->set_vnet_le) { |
| 599 | return -ENOSYS; |
| 600 | } |
| 601 | |
| 602 | return nc->info->set_vnet_le(nc, is_le); |
| 603 | #else |
| 604 | return 0; |
| 605 | #endif |
| 606 | } |
| 607 | |
| 608 | int qemu_set_vnet_be(NetClientState *nc, bool is_be) |
| 609 | { |
| 610 | #if HOST_BIG_ENDIAN |
| 611 | return 0; |
| 612 | #else |
| 613 | if (!nc || !nc->info->set_vnet_be) { |
| 614 | return -ENOSYS; |
| 615 | } |
| 616 | |
| 617 | return nc->info->set_vnet_be(nc, is_be); |
| 618 | #endif |
| 619 | } |
| 620 | |
| 621 | int qemu_can_receive_packet(NetClientState *nc) |
| 622 | { |
| 623 | if (nc->receive_disabled) { |
| 624 | return 0; |
| 625 | } else if (nc->info->can_receive && |
| 626 | !nc->info->can_receive(nc)) { |
| 627 | return 0; |
| 628 | } |
| 629 | return 1; |
| 630 | } |
| 631 | |
| 632 | int qemu_can_send_packet(NetClientState *sender) |
| 633 | { |
| 634 | int vm_running = runstate_is_running(); |
| 635 | |
| 636 | if (!vm_running) { |
| 637 | return 0; |
| 638 | } |
| 639 | |
| 640 | if (!sender->peer) { |
| 641 | return 1; |
| 642 | } |
| 643 | |
| 644 | return qemu_can_receive_packet(sender->peer); |
| 645 | } |
| 646 | |
| 647 | static ssize_t filter_receive_iov(NetClientState *nc, |
| 648 | NetFilterDirection direction, |
| 649 | NetClientState *sender, |
| 650 | unsigned flags, |
| 651 | const struct iovec *iov, |
| 652 | int iovcnt, |
| 653 | NetPacketSent *sent_cb) |
| 654 | { |
| 655 | ssize_t ret = 0; |
| 656 | NetFilterState *nf; |
| 657 | |
| 658 | if (direction == NET_FILTER_DIRECTION_TX) { |
| 659 | QTAILQ_FOREACH(nf, &nc->filters, next) { |
| 660 | ret = qemu_netfilter_receive(nf, direction, sender, flags, iov, |
| 661 | iovcnt, sent_cb); |
| 662 | if (ret) { |
| 663 | return ret; |
| 664 | } |
| 665 | } |
| 666 | } else { |
| 667 | QTAILQ_FOREACH_REVERSE(nf, &nc->filters, next) { |
| 668 | ret = qemu_netfilter_receive(nf, direction, sender, flags, iov, |
| 669 | iovcnt, sent_cb); |
| 670 | if (ret) { |
| 671 | return ret; |
| 672 | } |
| 673 | } |
| 674 | } |
| 675 | |
| 676 | return ret; |
| 677 | } |
| 678 | |
| 679 | static ssize_t filter_receive(NetClientState *nc, |
| 680 | NetFilterDirection direction, |
| 681 | NetClientState *sender, |
| 682 | unsigned flags, |
| 683 | const uint8_t *data, |
| 684 | size_t size, |
| 685 | NetPacketSent *sent_cb) |
| 686 | { |
| 687 | struct iovec iov = { |
| 688 | .iov_base = (void *)data, |
| 689 | .iov_len = size |
| 690 | }; |
| 691 | |
| 692 | return filter_receive_iov(nc, direction, sender, flags, &iov, 1, sent_cb); |
| 693 | } |
| 694 | |
| 695 | void qemu_purge_queued_packets(NetClientState *nc) |
| 696 | { |
| 697 | if (!nc->peer) { |
| 698 | return; |
| 699 | } |
| 700 | |
| 701 | qemu_net_queue_purge(nc->peer->incoming_queue, nc); |
| 702 | } |
| 703 | |
| 704 | void qemu_flush_or_purge_queued_packets(NetClientState *nc, bool purge) |
| 705 | { |
| 706 | nc->receive_disabled = 0; |
| 707 | |
| 708 | if (nc->peer && nc->peer->info->type == NET_CLIENT_DRIVER_HUBPORT) { |
| 709 | if (net_hub_flush(nc->peer)) { |
| 710 | qemu_notify_event(); |
| 711 | } |
| 712 | } |
| 713 | if (qemu_net_queue_flush(nc->incoming_queue)) { |
| 714 | /* We emptied the queue successfully, signal to the IO thread to repoll |
| 715 | * the file descriptor (for tap, for example). |
| 716 | */ |
| 717 | qemu_notify_event(); |
| 718 | } else if (purge) { |
| 719 | /* Unable to empty the queue, purge remaining packets */ |
| 720 | qemu_net_queue_purge(nc->incoming_queue, nc->peer); |
| 721 | } |
| 722 | } |
| 723 | |
| 724 | void qemu_flush_queued_packets(NetClientState *nc) |
| 725 | { |
| 726 | qemu_flush_or_purge_queued_packets(nc, false); |
| 727 | } |
| 728 | |
| 729 | static ssize_t qemu_send_packet_async_with_flags(NetClientState *sender, |
| 730 | unsigned flags, |
| 731 | const uint8_t *buf, int size, |
| 732 | NetPacketSent *sent_cb) |
| 733 | { |
| 734 | NetQueue *queue; |
| 735 | int ret; |
| 736 | |
| 737 | #ifdef DEBUG_NET |
| 738 | printf("qemu_send_packet_async:\n"); |
| 739 | qemu_hexdump(stdout, "net", buf, size); |
| 740 | #endif |
| 741 | |
| 742 | if (sender->link_down || !sender->peer) { |
| 743 | return size; |
| 744 | } |
| 745 | |
| 746 | /* Let filters handle the packet first */ |
| 747 | ret = filter_receive(sender, NET_FILTER_DIRECTION_TX, |
| 748 | sender, flags, buf, size, sent_cb); |
| 749 | if (ret) { |
| 750 | return ret; |
| 751 | } |
| 752 | |
| 753 | ret = filter_receive(sender->peer, NET_FILTER_DIRECTION_RX, |
| 754 | sender, flags, buf, size, sent_cb); |
| 755 | if (ret) { |
| 756 | return ret; |
| 757 | } |
| 758 | |
| 759 | queue = sender->peer->incoming_queue; |
| 760 | |
| 761 | return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb); |
| 762 | } |
| 763 | |
| 764 | ssize_t qemu_send_packet_async(NetClientState *sender, |
| 765 | const uint8_t *buf, int size, |
| 766 | NetPacketSent *sent_cb) |
| 767 | { |
| 768 | return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE, |
| 769 | buf, size, sent_cb); |
| 770 | } |
| 771 | |
| 772 | ssize_t qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size) |
| 773 | { |
| 774 | return qemu_send_packet_async(nc, buf, size, NULL); |
| 775 | } |
| 776 | |
| 777 | ssize_t qemu_receive_packet(NetClientState *nc, const uint8_t *buf, int size) |
| 778 | { |
| 779 | uint8_t min_pkt[ETH_ZLEN]; |
| 780 | size_t min_pktsz = sizeof(min_pkt); |
| 781 | |
| 782 | if (!qemu_can_receive_packet(nc)) { |
| 783 | return 0; |
| 784 | } |
| 785 | |
| 786 | if (net_client_needs_padding(nc)) { |
| 787 | if (eth_pad_short_frame(min_pkt, &min_pktsz, buf, size)) { |
| 788 | buf = min_pkt; |
| 789 | size = min_pktsz; |
| 790 | } |
| 791 | } |
| 792 | |
| 793 | return qemu_net_queue_receive(nc->incoming_queue, buf, size); |
| 794 | } |
| 795 | |
| 796 | ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size) |
| 797 | { |
| 798 | return qemu_send_packet_async_with_flags(nc, QEMU_NET_PACKET_FLAG_RAW, |
| 799 | buf, size, NULL); |
| 800 | } |
| 801 | |
| 802 | static ssize_t nc_sendv_compat(NetClientState *nc, const struct iovec *iov, |
| 803 | int iovcnt, unsigned flags) |
| 804 | { |
| 805 | uint8_t *buf = NULL; |
| 806 | uint8_t *buffer; |
| 807 | size_t offset; |
| 808 | ssize_t ret; |
| 809 | |
| 810 | if (iovcnt == 1) { |
| 811 | buffer = iov[0].iov_base; |
| 812 | offset = iov[0].iov_len; |
| 813 | } else { |
| 814 | offset = iov_size(iov, iovcnt); |
| 815 | if (offset > NET_BUFSIZE) { |
| 816 | return -1; |
| 817 | } |
| 818 | buf = g_malloc(offset); |
| 819 | buffer = buf; |
| 820 | offset = iov_to_buf(iov, iovcnt, 0, buf, offset); |
| 821 | } |
| 822 | |
| 823 | ret = nc->info->receive(nc, buffer, offset); |
| 824 | |
| 825 | g_free(buf); |
| 826 | return ret; |
| 827 | } |
| 828 | |
| 829 | static ssize_t qemu_deliver_packet_iov(NetClientState *sender, |
| 830 | unsigned flags, |
| 831 | const struct iovec *iov, |
| 832 | int iovcnt, |
| 833 | void *opaque) |
| 834 | { |
| 835 | MemReentrancyGuard *owned_reentrancy_guard; |
| 836 | NetClientState *nc = opaque; |
| 837 | int ret; |
| 838 | struct virtio_net_hdr_v1_hash vnet_hdr = { }; |
| 839 | g_autofree struct iovec *iov_copy = NULL; |
| 840 | |
| 841 | |
| 842 | if (nc->link_down) { |
| 843 | return iov_size(iov, iovcnt); |
| 844 | } |
| 845 | |
| 846 | if (nc->receive_disabled) { |
| 847 | return 0; |
| 848 | } |
| 849 | |
| 850 | if (nc->info->type != NET_CLIENT_DRIVER_NIC || |
| 851 | qemu_get_nic(nc)->reentrancy_guard->engaged_in_io) { |
| 852 | owned_reentrancy_guard = NULL; |
| 853 | } else { |
| 854 | owned_reentrancy_guard = qemu_get_nic(nc)->reentrancy_guard; |
| 855 | owned_reentrancy_guard->engaged_in_io = true; |
| 856 | } |
| 857 | |
| 858 | if ((flags & QEMU_NET_PACKET_FLAG_RAW) && nc->vnet_hdr_len) { |
| 859 | iov_copy = g_new(struct iovec, iovcnt + 1); |
| 860 | iov_copy[0].iov_base = &vnet_hdr; |
| 861 | iov_copy[0].iov_len = nc->vnet_hdr_len; |
| 862 | memcpy(&iov_copy[1], iov, iovcnt * sizeof(*iov)); |
| 863 | iov = iov_copy; |
| 864 | iovcnt++; |
| 865 | } |
| 866 | |
| 867 | if (nc->info->receive_iov) { |
| 868 | ret = nc->info->receive_iov(nc, iov, iovcnt); |
| 869 | } else { |
| 870 | ret = nc_sendv_compat(nc, iov, iovcnt, flags); |
| 871 | } |
| 872 | |
| 873 | if (owned_reentrancy_guard) { |
| 874 | owned_reentrancy_guard->engaged_in_io = false; |
| 875 | } |
| 876 | |
| 877 | if (ret == 0) { |
| 878 | nc->receive_disabled = 1; |
| 879 | } |
| 880 | |
| 881 | return ret; |
| 882 | } |
| 883 | |
| 884 | ssize_t qemu_sendv_packet_async(NetClientState *sender, |
| 885 | const struct iovec *iov, int iovcnt, |
| 886 | NetPacketSent *sent_cb) |
| 887 | { |
| 888 | NetQueue *queue; |
| 889 | size_t size = iov_size(iov, iovcnt); |
| 890 | int ret; |
| 891 | |
| 892 | if (size > NET_BUFSIZE) { |
| 893 | return size; |
| 894 | } |
| 895 | |
| 896 | if (sender->link_down || !sender->peer) { |
| 897 | return size; |
| 898 | } |
| 899 | |
| 900 | /* Let filters handle the packet first */ |
| 901 | ret = filter_receive_iov(sender, NET_FILTER_DIRECTION_TX, sender, |
| 902 | QEMU_NET_PACKET_FLAG_NONE, iov, iovcnt, sent_cb); |
| 903 | if (ret) { |
| 904 | return ret; |
| 905 | } |
| 906 | |
| 907 | ret = filter_receive_iov(sender->peer, NET_FILTER_DIRECTION_RX, sender, |
| 908 | QEMU_NET_PACKET_FLAG_NONE, iov, iovcnt, sent_cb); |
| 909 | if (ret) { |
| 910 | return ret; |
| 911 | } |
| 912 | |
| 913 | queue = sender->peer->incoming_queue; |
| 914 | |
| 915 | return qemu_net_queue_send_iov(queue, sender, |
| 916 | QEMU_NET_PACKET_FLAG_NONE, |
| 917 | iov, iovcnt, sent_cb); |
| 918 | } |
| 919 | |
| 920 | ssize_t |
| 921 | qemu_sendv_packet(NetClientState *nc, const struct iovec *iov, int iovcnt) |
| 922 | { |
| 923 | return qemu_sendv_packet_async(nc, iov, iovcnt, NULL); |
| 924 | } |
| 925 | |
| 926 | NetClientState *qemu_find_netdev(const char *id) |
| 927 | { |
| 928 | NetClientState *nc; |
| 929 | |
| 930 | QTAILQ_FOREACH(nc, &net_clients, next) { |
| 931 | if (nc->info->type == NET_CLIENT_DRIVER_NIC) |
| 932 | continue; |
| 933 | if (!strcmp(nc->name, id)) { |
| 934 | return nc; |
| 935 | } |
| 936 | } |
| 937 | |
| 938 | return NULL; |
| 939 | } |
| 940 | |
| 941 | int qemu_find_net_clients_except(const char *id, NetClientState **ncs, |
| 942 | NetClientDriver type, int max) |
| 943 | { |
| 944 | NetClientState *nc; |
| 945 | int ret = 0; |
| 946 | |
| 947 | QTAILQ_FOREACH(nc, &net_clients, next) { |
| 948 | if (nc->info->type == type) { |
| 949 | continue; |
| 950 | } |
| 951 | if (!id || !strcmp(nc->name, id)) { |
| 952 | if (ret < max) { |
| 953 | ncs[ret] = nc; |
| 954 | } |
| 955 | ret++; |
| 956 | } |
| 957 | } |
| 958 | |
| 959 | return ret; |
| 960 | } |
| 961 | |
| 962 | static int nic_get_free_idx(void) |
| 963 | { |
| 964 | int index; |
| 965 | |
| 966 | for (index = 0; index < MAX_NICS; index++) |
| 967 | if (!nd_table[index].used) |
| 968 | return index; |
| 969 | return -1; |
| 970 | } |
| 971 | |
| 972 | GPtrArray *qemu_get_nic_models(const char *device_type) |
| 973 | { |
| 974 | GPtrArray *nic_models = g_ptr_array_new(); |
| 975 | GSList *list = object_class_get_list_sorted(device_type, false); |
| 976 | |
| 977 | while (list) { |
| 978 | DeviceClass *dc = OBJECT_CLASS_CHECK(DeviceClass, list->data, |
| 979 | TYPE_DEVICE); |
| 980 | GSList *next; |
| 981 | if (test_bit(DEVICE_CATEGORY_NETWORK, dc->categories) && |
| 982 | dc->user_creatable) { |
| 983 | const char *name = object_class_get_name(list->data); |
| 984 | /* |
| 985 | * A network device might also be something else than a NIC, see |
| 986 | * e.g. the "rocker" device. Thus we have to look for the "netdev" |
| 987 | * property, too. Unfortunately, some devices like virtio-net only |
| 988 | * create this property during instance_init, so we have to create |
| 989 | * a temporary instance here to be able to check it. |
| 990 | */ |
| 991 | Object *obj = object_new_with_class(OBJECT_CLASS(dc)); |
| 992 | if (object_property_find(obj, "netdev")) { |
| 993 | g_ptr_array_add(nic_models, (gpointer)name); |
| 994 | } |
| 995 | object_unref(obj); |
| 996 | } |
| 997 | next = list->next; |
| 998 | g_slist_free_1(list); |
| 999 | list = next; |
| 1000 | } |
| 1001 | g_ptr_array_add(nic_models, NULL); |
| 1002 | |
| 1003 | return nic_models; |
| 1004 | } |
| 1005 | |
| 1006 | static int net_init_nic(const Netdev *netdev, const char *name, |
| 1007 | NetClientState *peer, Error **errp) |
| 1008 | { |
| 1009 | int idx; |
| 1010 | NICInfo *nd; |
| 1011 | const NetLegacyNicOptions *nic; |
| 1012 | |
| 1013 | assert(netdev->type == NET_CLIENT_DRIVER_NIC); |
| 1014 | nic = &netdev->u.nic; |
| 1015 | |
| 1016 | idx = nic_get_free_idx(); |
| 1017 | if (idx == -1 || nb_nics >= MAX_NICS) { |
| 1018 | error_setg(errp, "too many NICs"); |
| 1019 | return -1; |
| 1020 | } |
| 1021 | |
| 1022 | nd = &nd_table[idx]; |
| 1023 | |
| 1024 | memset(nd, 0, sizeof(*nd)); |
| 1025 | |
| 1026 | if (nic->netdev) { |
| 1027 | nd->netdev = qemu_find_netdev(nic->netdev); |
| 1028 | if (!nd->netdev) { |
| 1029 | error_setg(errp, "netdev '%s' not found", nic->netdev); |
| 1030 | return -1; |
| 1031 | } |
| 1032 | } else { |
| 1033 | assert(peer); |
| 1034 | nd->netdev = peer; |
| 1035 | } |
| 1036 | nd->name = g_strdup(name); |
| 1037 | if (nic->model) { |
| 1038 | nd->model = g_strdup(nic->model); |
| 1039 | } |
| 1040 | if (nic->addr) { |
| 1041 | nd->devaddr = g_strdup(nic->addr); |
| 1042 | } |
| 1043 | |
| 1044 | if (nic->macaddr && |
| 1045 | net_parse_macaddr(nd->macaddr.a, nic->macaddr) < 0) { |
| 1046 | error_setg(errp, "invalid syntax for ethernet address"); |
| 1047 | return -1; |
| 1048 | } |
| 1049 | if (nic->macaddr && |
| 1050 | is_multicast_ether_addr(nd->macaddr.a)) { |
| 1051 | error_setg(errp, |
| 1052 | "NIC cannot have multicast MAC address (odd 1st byte)"); |
| 1053 | return -1; |
| 1054 | } |
| 1055 | qemu_macaddr_default_if_unset(&nd->macaddr); |
| 1056 | |
| 1057 | if (nic->has_vectors) { |
| 1058 | if (nic->vectors > 0x7ffffff) { |
| 1059 | error_setg(errp, "invalid # of vectors: %"PRIu32, nic->vectors); |
| 1060 | return -1; |
| 1061 | } |
| 1062 | nd->nvectors = nic->vectors; |
| 1063 | } else { |
| 1064 | nd->nvectors = DEV_NVECTORS_UNSPECIFIED; |
| 1065 | } |
| 1066 | |
| 1067 | nd->used = 1; |
| 1068 | nb_nics++; |
| 1069 | |
| 1070 | return idx; |
| 1071 | } |
| 1072 | |
| 1073 | static gboolean add_nic_result(gpointer key, gpointer value, gpointer user_data) |
| 1074 | { |
| 1075 | GPtrArray *results = user_data; |
| 1076 | GPtrArray *alias_list = value; |
| 1077 | const char *model = key; |
| 1078 | char *result; |
| 1079 | |
| 1080 | if (!alias_list) { |
| 1081 | result = g_strdup(model); |
| 1082 | } else { |
| 1083 | GString *result_str = g_string_new(model); |
| 1084 | int i; |
| 1085 | |
| 1086 | g_string_append(result_str, " (aka "); |
| 1087 | for (i = 0; i < alias_list->len; i++) { |
| 1088 | if (i) { |
| 1089 | g_string_append(result_str, ", "); |
| 1090 | } |
| 1091 | g_string_append(result_str, alias_list->pdata[i]); |
| 1092 | } |
| 1093 | g_string_append(result_str, ")"); |
| 1094 | result = result_str->str; |
| 1095 | g_string_free(result_str, false); |
| 1096 | g_ptr_array_unref(alias_list); |
| 1097 | } |
| 1098 | g_ptr_array_add(results, result); |
| 1099 | return true; |
| 1100 | } |
| 1101 | |
| 1102 | static int model_cmp(char **a, char **b) |
| 1103 | { |
| 1104 | return strcmp(*a, *b); |
| 1105 | } |
| 1106 | |
| 1107 | static void show_nic_models(void) |
| 1108 | { |
| 1109 | GPtrArray *results = g_ptr_array_new(); |
| 1110 | int i; |
| 1111 | |
| 1112 | g_hash_table_foreach_remove(nic_model_help, add_nic_result, results); |
| 1113 | g_ptr_array_sort(results, (GCompareFunc)model_cmp); |
| 1114 | |
| 1115 | printf("Available NIC models for this configuration:\n"); |
| 1116 | for (i = 0 ; i < results->len; i++) { |
| 1117 | printf("%s\n", (char *)results->pdata[i]); |
| 1118 | } |
| 1119 | g_hash_table_unref(nic_model_help); |
| 1120 | nic_model_help = NULL; |
| 1121 | } |
| 1122 | |
| 1123 | static void add_nic_model_help(const char *model, const char *alias) |
| 1124 | { |
| 1125 | GPtrArray *alias_list = NULL; |
| 1126 | |
| 1127 | if (g_hash_table_lookup_extended(nic_model_help, model, NULL, |
| 1128 | (gpointer *)&alias_list)) { |
| 1129 | /* Already exists, no alias to add: return */ |
| 1130 | if (!alias) { |
| 1131 | return; |
| 1132 | } |
| 1133 | if (alias_list) { |
| 1134 | /* Check if this alias is already in the list. Add if not. */ |
| 1135 | if (!g_ptr_array_find_with_equal_func(alias_list, alias, |
| 1136 | g_str_equal, NULL)) { |
| 1137 | g_ptr_array_add(alias_list, g_strdup(alias)); |
| 1138 | } |
| 1139 | return; |
| 1140 | } |
| 1141 | } |
| 1142 | /* Either this model wasn't in the list already, or a first alias added */ |
| 1143 | if (alias) { |
| 1144 | alias_list = g_ptr_array_new(); |
| 1145 | g_ptr_array_set_free_func(alias_list, g_free); |
| 1146 | g_ptr_array_add(alias_list, g_strdup(alias)); |
| 1147 | } |
| 1148 | g_hash_table_replace(nic_model_help, g_strdup(model), alias_list); |
| 1149 | } |
| 1150 | |
| 1151 | NICInfo *qemu_find_nic_info(const char *typename, bool match_default, |
| 1152 | const char *alias) |
| 1153 | { |
| 1154 | NICInfo *nd; |
| 1155 | int i; |
| 1156 | |
| 1157 | if (nic_model_help) { |
| 1158 | add_nic_model_help(typename, alias); |
| 1159 | } |
| 1160 | |
| 1161 | for (i = 0; i < nb_nics; i++) { |
| 1162 | nd = &nd_table[i]; |
| 1163 | |
| 1164 | if (!nd->used || nd->instantiated) { |
| 1165 | continue; |
| 1166 | } |
| 1167 | |
| 1168 | if ((match_default && !nd->model) || !g_strcmp0(nd->model, typename) |
| 1169 | || (alias && !g_strcmp0(nd->model, alias))) { |
| 1170 | return nd; |
| 1171 | } |
| 1172 | } |
| 1173 | return NULL; |
| 1174 | } |
| 1175 | |
| 1176 | static bool is_nic_model_help_option(const char *model) |
| 1177 | { |
| 1178 | if (model && is_help_option(model)) { |
| 1179 | /* |
| 1180 | * Trigger the help output by instantiating the hash table which |
| 1181 | * will gather tha available models as they get registered. |
| 1182 | */ |
| 1183 | if (!nic_model_help) { |
| 1184 | nic_model_help = g_hash_table_new_full(g_str_hash, g_str_equal, |
| 1185 | g_free, NULL); |
| 1186 | } |
| 1187 | return true; |
| 1188 | } |
| 1189 | return false; |
| 1190 | } |
| 1191 | |
| 1192 | /* "I have created a device. Please configure it if you can" */ |
| 1193 | bool qemu_configure_nic_device(DeviceState *dev, bool match_default, |
| 1194 | const char *alias) |
| 1195 | { |
| 1196 | NICInfo *nd = qemu_find_nic_info(object_get_typename(OBJECT(dev)), |
| 1197 | match_default, alias); |
| 1198 | |
| 1199 | if (nd) { |
| 1200 | qdev_set_nic_properties(dev, nd); |
| 1201 | return true; |
| 1202 | } |
| 1203 | return false; |
| 1204 | } |
| 1205 | |
| 1206 | /* "Please create a device, if you have a configuration for it" */ |
| 1207 | DeviceState *qemu_create_nic_device(const char *typename, bool match_default, |
| 1208 | const char *alias) |
| 1209 | { |
| 1210 | NICInfo *nd = qemu_find_nic_info(typename, match_default, alias); |
| 1211 | DeviceState *dev; |
| 1212 | |
| 1213 | if (!nd) { |
| 1214 | return NULL; |
| 1215 | } |
| 1216 | |
| 1217 | dev = qdev_new(typename); |
| 1218 | qdev_set_nic_properties(dev, nd); |
| 1219 | return dev; |
| 1220 | } |
| 1221 | |
| 1222 | void qemu_create_nic_bus_devices(BusState *bus, const char *parent_type, |
| 1223 | const char *default_model, |
| 1224 | const char *alias, const char *alias_target) |
| 1225 | { |
| 1226 | GPtrArray *nic_models = qemu_get_nic_models(parent_type); |
| 1227 | const char *model; |
| 1228 | DeviceState *dev; |
| 1229 | NICInfo *nd; |
| 1230 | int i; |
| 1231 | |
| 1232 | if (nic_model_help) { |
| 1233 | if (alias_target) { |
| 1234 | add_nic_model_help(alias_target, alias); |
| 1235 | } |
| 1236 | for (i = 0; i < nic_models->len - 1; i++) { |
| 1237 | add_nic_model_help(nic_models->pdata[i], NULL); |
| 1238 | } |
| 1239 | } |
| 1240 | |
| 1241 | /* Drop the NULL terminator which would make g_str_equal() unhappy */ |
| 1242 | nic_models->len--; |
| 1243 | |
| 1244 | for (i = 0; i < nb_nics; i++) { |
| 1245 | nd = &nd_table[i]; |
| 1246 | |
| 1247 | if (!nd->used || nd->instantiated) { |
| 1248 | continue; |
| 1249 | } |
| 1250 | |
| 1251 | model = nd->model ? nd->model : default_model; |
| 1252 | if (!model) { |
| 1253 | continue; |
| 1254 | } |
| 1255 | |
| 1256 | /* Each bus type is allowed *one* substitution */ |
| 1257 | if (g_str_equal(model, alias)) { |
| 1258 | model = alias_target; |
| 1259 | } |
| 1260 | |
| 1261 | if (!g_ptr_array_find_with_equal_func(nic_models, model, |
| 1262 | g_str_equal, NULL)) { |
| 1263 | /* This NIC does not live on this bus. */ |
| 1264 | continue; |
| 1265 | } |
| 1266 | |
| 1267 | dev = qdev_new(model); |
| 1268 | qdev_set_nic_properties(dev, nd); |
| 1269 | qdev_realize_and_unref(dev, bus, &error_fatal); |
| 1270 | } |
| 1271 | |
| 1272 | g_ptr_array_free(nic_models, true); |
| 1273 | } |
| 1274 | |
| 1275 | static int (* const net_client_init_fun[NET_CLIENT_DRIVER__MAX])( |
| 1276 | const Netdev *netdev, |
| 1277 | const char *name, |
| 1278 | NetClientState *peer, Error **errp) = { |
| 1279 | [NET_CLIENT_DRIVER_NIC] = net_init_nic, |
| 1280 | #ifdef CONFIG_PASST |
| 1281 | [NET_CLIENT_DRIVER_PASST] = net_init_passt, |
| 1282 | #endif |
| 1283 | #ifdef CONFIG_SLIRP |
| 1284 | [NET_CLIENT_DRIVER_USER] = net_init_slirp, |
| 1285 | #endif |
| 1286 | [NET_CLIENT_DRIVER_TAP] = net_init_tap, |
| 1287 | [NET_CLIENT_DRIVER_SOCKET] = net_init_socket, |
| 1288 | [NET_CLIENT_DRIVER_STREAM] = net_init_stream, |
| 1289 | [NET_CLIENT_DRIVER_DGRAM] = net_init_dgram, |
| 1290 | #ifdef CONFIG_VDE |
| 1291 | [NET_CLIENT_DRIVER_VDE] = net_init_vde, |
| 1292 | #endif |
| 1293 | #ifdef CONFIG_NETMAP |
| 1294 | [NET_CLIENT_DRIVER_NETMAP] = net_init_netmap, |
| 1295 | #endif |
| 1296 | #ifdef CONFIG_AF_XDP |
| 1297 | [NET_CLIENT_DRIVER_AF_XDP] = net_init_af_xdp, |
| 1298 | #endif |
| 1299 | #ifdef CONFIG_NET_BRIDGE |
| 1300 | [NET_CLIENT_DRIVER_BRIDGE] = net_init_bridge, |
| 1301 | #endif |
| 1302 | [NET_CLIENT_DRIVER_HUBPORT] = net_init_hubport, |
| 1303 | #ifdef CONFIG_VHOST_NET_USER |
| 1304 | [NET_CLIENT_DRIVER_VHOST_USER] = net_init_vhost_user, |
| 1305 | #endif |
| 1306 | #ifdef CONFIG_VHOST_NET_VDPA |
| 1307 | [NET_CLIENT_DRIVER_VHOST_VDPA] = net_init_vhost_vdpa, |
| 1308 | #endif |
| 1309 | #ifdef CONFIG_L2TPV3 |
| 1310 | [NET_CLIENT_DRIVER_L2TPV3] = net_init_l2tpv3, |
| 1311 | #endif |
| 1312 | #ifdef CONFIG_VMNET |
| 1313 | [NET_CLIENT_DRIVER_VMNET_HOST] = net_init_vmnet_host, |
| 1314 | [NET_CLIENT_DRIVER_VMNET_SHARED] = net_init_vmnet_shared, |
| 1315 | [NET_CLIENT_DRIVER_VMNET_BRIDGED] = net_init_vmnet_bridged, |
| 1316 | #endif /* CONFIG_VMNET */ |
| 1317 | }; |
| 1318 | |
| 1319 | |
| 1320 | static int net_client_init1(const Netdev *netdev, bool is_netdev, Error **errp) |
| 1321 | { |
| 1322 | NetClientState *peer = NULL; |
| 1323 | NetClientState *nc; |
| 1324 | |
| 1325 | if (is_netdev) { |
| 1326 | if (netdev->type == NET_CLIENT_DRIVER_NIC || |
| 1327 | !net_client_init_fun[netdev->type]) { |
| 1328 | error_setg(errp, "network backend '%s' is not compiled into this binary", |
| 1329 | NetClientDriver_str(netdev->type)); |
| 1330 | return -1; |
| 1331 | } |
| 1332 | } else { |
| 1333 | if (netdev->type == NET_CLIENT_DRIVER_NONE) { |
| 1334 | return 0; /* nothing to do */ |
| 1335 | } |
| 1336 | if (netdev->type == NET_CLIENT_DRIVER_HUBPORT) { |
| 1337 | error_setg(errp, "network backend '%s' is only supported with -netdev/-nic", |
| 1338 | NetClientDriver_str(netdev->type)); |
| 1339 | return -1; |
| 1340 | } |
| 1341 | |
| 1342 | if (!net_client_init_fun[netdev->type]) { |
| 1343 | error_setg(errp, "network backend '%s' is not compiled into this binary", |
| 1344 | NetClientDriver_str(netdev->type)); |
| 1345 | return -1; |
| 1346 | } |
| 1347 | |
| 1348 | /* Do not add to a hub if it's a nic with a netdev= parameter. */ |
| 1349 | if (netdev->type != NET_CLIENT_DRIVER_NIC || |
| 1350 | !netdev->u.nic.netdev) { |
| 1351 | peer = net_hub_add_port(0, NULL, NULL); |
| 1352 | } |
| 1353 | } |
| 1354 | |
| 1355 | nc = qemu_find_netdev(netdev->id); |
| 1356 | if (nc) { |
| 1357 | error_setg(errp, "Duplicate ID '%s'", netdev->id); |
| 1358 | return -1; |
| 1359 | } |
| 1360 | |
| 1361 | if (net_client_init_fun[netdev->type](netdev, netdev->id, peer, errp) < 0) { |
| 1362 | /* FIXME drop when all init functions store an Error */ |
| 1363 | if (errp && !*errp) { |
| 1364 | error_setg(errp, "Device '%s' could not be initialized", |
| 1365 | NetClientDriver_str(netdev->type)); |
| 1366 | } |
| 1367 | return -1; |
| 1368 | } |
| 1369 | |
| 1370 | if (is_netdev) { |
| 1371 | nc = qemu_find_netdev(netdev->id); |
| 1372 | assert(nc); |
| 1373 | nc->is_netdev = true; |
| 1374 | } |
| 1375 | |
| 1376 | return 0; |
| 1377 | } |
| 1378 | |
| 1379 | void show_netdevs(void) |
| 1380 | { |
| 1381 | int idx; |
| 1382 | const char *available_netdevs[] = { |
| 1383 | "socket", |
| 1384 | "stream", |
| 1385 | "dgram", |
| 1386 | "hubport", |
| 1387 | "tap", |
| 1388 | #ifdef CONFIG_PASST |
| 1389 | "passt", |
| 1390 | #endif |
| 1391 | #ifdef CONFIG_SLIRP |
| 1392 | "user", |
| 1393 | #endif |
| 1394 | #ifdef CONFIG_L2TPV3 |
| 1395 | "l2tpv3", |
| 1396 | #endif |
| 1397 | #ifdef CONFIG_VDE |
| 1398 | "vde", |
| 1399 | #endif |
| 1400 | #ifdef CONFIG_NET_BRIDGE |
| 1401 | "bridge", |
| 1402 | #endif |
| 1403 | #ifdef CONFIG_NETMAP |
| 1404 | "netmap", |
| 1405 | #endif |
| 1406 | #ifdef CONFIG_AF_XDP |
| 1407 | "af-xdp", |
| 1408 | #endif |
| 1409 | #ifdef CONFIG_POSIX |
| 1410 | "vhost-user", |
| 1411 | #endif |
| 1412 | #ifdef CONFIG_VHOST_VDPA |
| 1413 | "vhost-vdpa", |
| 1414 | #endif |
| 1415 | #ifdef CONFIG_VMNET |
| 1416 | "vmnet-host", |
| 1417 | "vmnet-shared", |
| 1418 | "vmnet-bridged", |
| 1419 | #endif |
| 1420 | }; |
| 1421 | |
| 1422 | qemu_printf("Available netdev backend types:\n"); |
| 1423 | for (idx = 0; idx < ARRAY_SIZE(available_netdevs); idx++) { |
| 1424 | qemu_printf("%s\n", available_netdevs[idx]); |
| 1425 | } |
| 1426 | } |
| 1427 | |
| 1428 | static int net_client_init(QemuOpts *opts, bool is_netdev, Error **errp) |
| 1429 | { |
| 1430 | gchar **substrings = NULL; |
| 1431 | Netdev *object = NULL; |
| 1432 | int ret = -1; |
| 1433 | Visitor *v = opts_visitor_new(opts); |
| 1434 | |
| 1435 | /* Parse convenience option format ipv6-net=fec0::0[/64] */ |
| 1436 | const char *ip6_net = qemu_opt_get(opts, "ipv6-net"); |
| 1437 | |
| 1438 | if (ip6_net) { |
| 1439 | char *prefix_addr; |
| 1440 | unsigned long prefix_len = 64; /* Default 64bit prefix length. */ |
| 1441 | |
| 1442 | substrings = g_strsplit(ip6_net, "/", 2); |
| 1443 | if (!substrings || !substrings[0]) { |
| 1444 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "ipv6-net", |
| 1445 | "a valid IPv6 prefix"); |
| 1446 | goto out; |
| 1447 | } |
| 1448 | |
| 1449 | prefix_addr = substrings[0]; |
| 1450 | |
| 1451 | /* Handle user-specified prefix length. */ |
| 1452 | if (substrings[1] && |
| 1453 | qemu_strtoul(substrings[1], NULL, 10, &prefix_len)) |
| 1454 | { |
| 1455 | error_setg(errp, |
| 1456 | "parameter 'ipv6-net' expects a number after '/'"); |
| 1457 | goto out; |
| 1458 | } |
| 1459 | |
| 1460 | qemu_opt_set(opts, "ipv6-prefix", prefix_addr, &error_abort); |
| 1461 | qemu_opt_set_number(opts, "ipv6-prefixlen", prefix_len, |
| 1462 | &error_abort); |
| 1463 | qemu_opt_unset(opts, "ipv6-net"); |
| 1464 | } |
| 1465 | |
| 1466 | /* Create an ID for -net if the user did not specify one */ |
| 1467 | if (!is_netdev && !qemu_opts_id(opts)) { |
| 1468 | qemu_opts_set_id(opts, id_generate(ID_NET)); |
| 1469 | } |
| 1470 | |
| 1471 | if (visit_type_Netdev(v, NULL, &object, errp)) { |
| 1472 | ret = net_client_init1(object, is_netdev, errp); |
| 1473 | } |
| 1474 | |
| 1475 | qapi_free_Netdev(object); |
| 1476 | |
| 1477 | out: |
| 1478 | g_strfreev(substrings); |
| 1479 | visit_free(v); |
| 1480 | return ret; |
| 1481 | } |
| 1482 | |
| 1483 | void netdev_add(QemuOpts *opts, Error **errp) |
| 1484 | { |
| 1485 | net_client_init(opts, true, errp); |
| 1486 | } |
| 1487 | |
| 1488 | void qmp_netdev_add(Netdev *netdev, Error **errp) |
| 1489 | { |
| 1490 | if (!id_wellformed(netdev->id)) { |
| 1491 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "id", "an identifier"); |
| 1492 | return; |
| 1493 | } |
| 1494 | |
| 1495 | net_client_init1(netdev, true, errp); |
| 1496 | } |
| 1497 | |
| 1498 | void qmp_netdev_del(const char *id, Error **errp) |
| 1499 | { |
| 1500 | NetClientState *nc; |
| 1501 | QemuOpts *opts; |
| 1502 | |
| 1503 | nc = qemu_find_netdev(id); |
| 1504 | if (!nc) { |
| 1505 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, |
| 1506 | "Device '%s' not found", id); |
| 1507 | return; |
| 1508 | } |
| 1509 | |
| 1510 | if (!nc->is_netdev) { |
| 1511 | error_setg(errp, "Device '%s' is not a netdev", id); |
| 1512 | return; |
| 1513 | } |
| 1514 | |
| 1515 | qemu_del_net_client(nc); |
| 1516 | |
| 1517 | /* |
| 1518 | * Wart: we need to delete the QemuOpts associated with netdevs |
| 1519 | * created via CLI or HMP, to avoid bogus "Duplicate ID" errors in |
| 1520 | * HMP netdev_add. |
| 1521 | */ |
| 1522 | opts = qemu_opts_find(qemu_find_opts("netdev"), id); |
| 1523 | if (opts) { |
| 1524 | qemu_opts_del(opts); |
| 1525 | } |
| 1526 | } |
| 1527 | |
| 1528 | static char *netfilter_get_info_str(NetFilterState *nf) |
| 1529 | { |
| 1530 | char *str; |
| 1531 | ObjectProperty *prop; |
| 1532 | ObjectPropertyIterator iter; |
| 1533 | Visitor *v; |
| 1534 | GString *buf = g_string_new(NULL); |
| 1535 | |
| 1536 | object_property_iter_init(&iter, OBJECT(nf)); |
| 1537 | while ((prop = object_property_iter_next(&iter))) { |
| 1538 | if (!strcmp(prop->name, "type")) { |
| 1539 | continue; |
| 1540 | } |
| 1541 | v = string_output_visitor_new(false, &str); |
| 1542 | object_property_get(OBJECT(nf), prop->name, v, NULL); |
| 1543 | visit_complete(v, &str); |
| 1544 | visit_free(v); |
| 1545 | if (buf->len > 0) { |
| 1546 | g_string_append_c(buf, ','); |
| 1547 | } |
| 1548 | g_string_append_printf(buf, "%s=%s", prop->name, str); |
| 1549 | g_free(str); |
| 1550 | } |
| 1551 | |
| 1552 | return g_string_free(buf, false); |
| 1553 | } |
| 1554 | |
| 1555 | static NetworkClientInfo *net_client_info_no_peer(NetClientState *nc) |
| 1556 | { |
| 1557 | NetworkClientInfo *info = g_new0(NetworkClientInfo, 1); |
| 1558 | NetFilterState *nf; |
| 1559 | |
| 1560 | info->name = g_strdup(nc->name); |
| 1561 | info->queue_index = nc->queue_index; |
| 1562 | info->type = nc->info->type; |
| 1563 | info->info_str = g_strdup(nc->info_str); |
| 1564 | |
| 1565 | if (!QTAILQ_EMPTY(&nc->filters)) { |
| 1566 | NetFilterInfoList **ftail = &info->filters; |
| 1567 | QTAILQ_FOREACH(nf, &nc->filters, next) { |
| 1568 | NetFilterInfo *fi = g_new0(NetFilterInfo, 1); |
| 1569 | fi->name = g_strdup( |
| 1570 | object_get_canonical_path_component(OBJECT(nf))); |
| 1571 | fi->type = g_strdup(object_get_typename(OBJECT(nf))); |
| 1572 | fi->info = netfilter_get_info_str(nf); |
| 1573 | QAPI_LIST_APPEND(ftail, fi); |
| 1574 | } |
| 1575 | } |
| 1576 | |
| 1577 | return info; |
| 1578 | } |
| 1579 | |
| 1580 | NetworkClientInfo *net_client_info(NetClientState *nc) |
| 1581 | { |
| 1582 | NetworkClientInfo *info = net_client_info_no_peer(nc); |
| 1583 | |
| 1584 | if (nc->peer) { |
| 1585 | info->peer = net_client_info_no_peer(nc->peer); |
| 1586 | } |
| 1587 | |
| 1588 | return info; |
| 1589 | } |
| 1590 | |
| 1591 | NetworkInfo *qmp_x_query_network(Error **errp) |
| 1592 | { |
| 1593 | NetworkInfo *info = g_new0(NetworkInfo, 1); |
| 1594 | NetworkClientInfoList **tail = &info->clients; |
| 1595 | NetClientState *nc; |
| 1596 | |
| 1597 | info->hubs = net_hub_query_info(); |
| 1598 | |
| 1599 | QTAILQ_FOREACH(nc, &net_clients, next) { |
| 1600 | /* Skip if already gathered in hub info */ |
| 1601 | if (net_hub_id_for_client(nc, NULL) == 0) { |
| 1602 | continue; |
| 1603 | } |
| 1604 | QAPI_LIST_APPEND(tail, net_client_info(nc)); |
| 1605 | } |
| 1606 | |
| 1607 | return info; |
| 1608 | } |
| 1609 | |
| 1610 | RxFilterInfoList *qmp_query_rx_filter(const char *name, Error **errp) |
| 1611 | { |
| 1612 | NetClientState *nc; |
| 1613 | RxFilterInfoList *filter_list = NULL, **tail = &filter_list; |
| 1614 | |
| 1615 | QTAILQ_FOREACH(nc, &net_clients, next) { |
| 1616 | RxFilterInfo *info; |
| 1617 | |
| 1618 | if (name && strcmp(nc->name, name) != 0) { |
| 1619 | continue; |
| 1620 | } |
| 1621 | |
| 1622 | /* only query rx-filter information of NIC */ |
| 1623 | if (nc->info->type != NET_CLIENT_DRIVER_NIC) { |
| 1624 | if (name) { |
| 1625 | error_setg(errp, "net client(%s) isn't a NIC", name); |
| 1626 | assert(!filter_list); |
| 1627 | return NULL; |
| 1628 | } |
| 1629 | continue; |
| 1630 | } |
| 1631 | |
| 1632 | /* only query information on queue 0 since the info is per nic, |
| 1633 | * not per queue |
| 1634 | */ |
| 1635 | if (nc->queue_index != 0) |
| 1636 | continue; |
| 1637 | |
| 1638 | if (nc->info->query_rx_filter) { |
| 1639 | info = nc->info->query_rx_filter(nc); |
| 1640 | QAPI_LIST_APPEND(tail, info); |
| 1641 | } else if (name) { |
| 1642 | error_setg(errp, "net client(%s) doesn't support" |
| 1643 | " rx-filter querying", name); |
| 1644 | assert(!filter_list); |
| 1645 | return NULL; |
| 1646 | } |
| 1647 | |
| 1648 | if (name) { |
| 1649 | break; |
| 1650 | } |
| 1651 | } |
| 1652 | |
| 1653 | if (filter_list == NULL && name) { |
| 1654 | error_setg(errp, "invalid net client name: %s", name); |
| 1655 | } |
| 1656 | |
| 1657 | return filter_list; |
| 1658 | } |
| 1659 | |
| 1660 | void colo_notify_filters_event(int event, Error **errp) |
| 1661 | { |
| 1662 | NetClientState *nc; |
| 1663 | NetFilterState *nf; |
| 1664 | NetFilterClass *nfc = NULL; |
| 1665 | Error *local_err = NULL; |
| 1666 | |
| 1667 | QTAILQ_FOREACH(nc, &net_clients, next) { |
| 1668 | QTAILQ_FOREACH(nf, &nc->filters, next) { |
| 1669 | nfc = NETFILTER_GET_CLASS(OBJECT(nf)); |
| 1670 | nfc->handle_event(nf, event, &local_err); |
| 1671 | if (local_err) { |
| 1672 | error_propagate(errp, local_err); |
| 1673 | return; |
| 1674 | } |
| 1675 | } |
| 1676 | } |
| 1677 | } |
| 1678 | |
| 1679 | void net_client_set_link(NetClientState **ncs, int queues, bool up) |
| 1680 | { |
| 1681 | NetClientState *nc; |
| 1682 | int i; |
| 1683 | |
| 1684 | nc = ncs[0]; |
| 1685 | |
| 1686 | for (i = 0; i < queues; i++) { |
| 1687 | ncs[i]->link_down = !up; |
| 1688 | } |
| 1689 | |
| 1690 | if (nc->info->link_status_changed) { |
| 1691 | nc->info->link_status_changed(nc); |
| 1692 | } |
| 1693 | |
| 1694 | if (nc->peer) { |
| 1695 | /* Change peer link only if the peer is NIC and then notify peer. |
| 1696 | * If the peer is a HUBPORT or a backend, we do not change the |
| 1697 | * link status. |
| 1698 | * |
| 1699 | * This behavior is compatible with qemu hubs where there could be |
| 1700 | * multiple clients that can still communicate with each other in |
| 1701 | * disconnected mode. For now maintain this compatibility. |
| 1702 | */ |
| 1703 | if (nc->peer->info->type == NET_CLIENT_DRIVER_NIC) { |
| 1704 | for (i = 0; i < queues; i++) { |
| 1705 | ncs[i]->peer->link_down = !up; |
| 1706 | } |
| 1707 | } |
| 1708 | if (nc->peer->info->link_status_changed) { |
| 1709 | nc->peer->info->link_status_changed(nc->peer); |
| 1710 | } |
| 1711 | } |
| 1712 | } |
| 1713 | |
| 1714 | void qmp_set_link(const char *name, bool up, Error **errp) |
| 1715 | { |
| 1716 | NetClientState *ncs[MAX_QUEUE_NUM]; |
| 1717 | int queues; |
| 1718 | |
| 1719 | queues = qemu_find_net_clients_except(name, ncs, |
| 1720 | NET_CLIENT_DRIVER__MAX, |
| 1721 | MAX_QUEUE_NUM); |
| 1722 | |
| 1723 | if (queues == 0) { |
| 1724 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, |
| 1725 | "Device '%s' not found", name); |
| 1726 | return; |
| 1727 | } |
| 1728 | |
| 1729 | net_client_set_link(ncs, queues, up); |
| 1730 | } |
| 1731 | |
| 1732 | static void net_vm_change_state_handler(void *opaque, bool running, |
| 1733 | RunState state) |
| 1734 | { |
| 1735 | NetClientState *nc; |
| 1736 | NetClientState *tmp; |
| 1737 | |
| 1738 | QTAILQ_FOREACH_SAFE(nc, &net_clients, next, tmp) { |
| 1739 | if (running) { |
| 1740 | /* Flush queued packets and wake up backends. */ |
| 1741 | if (nc->peer && qemu_can_send_packet(nc)) { |
| 1742 | qemu_flush_queued_packets(nc->peer); |
| 1743 | } |
| 1744 | } else { |
| 1745 | /* Complete all queued packets, to guarantee we don't modify |
| 1746 | * state later when VM is not running. |
| 1747 | */ |
| 1748 | qemu_flush_or_purge_queued_packets(nc, true); |
| 1749 | } |
| 1750 | } |
| 1751 | } |
| 1752 | |
| 1753 | void net_cleanup(void) |
| 1754 | { |
| 1755 | NetClientState *nc, **p = &QTAILQ_FIRST(&net_clients); |
| 1756 | |
| 1757 | /*cleanup colo compare module for COLO*/ |
| 1758 | colo_compare_cleanup(); |
| 1759 | |
| 1760 | /* |
| 1761 | * Walk the net_clients list and remove the netdevs but *not* any |
| 1762 | * NET_CLIENT_DRIVER_NIC entries. The latter are owned by the device |
| 1763 | * model which created them, and in some cases (e.g. xen-net-device) |
| 1764 | * the device itself may do cleanup at exit and will be upset if we |
| 1765 | * just delete its NIC from underneath it. |
| 1766 | * |
| 1767 | * Since qemu_del_net_client() may delete multiple entries, using |
| 1768 | * QTAILQ_FOREACH_SAFE() is not safe here. The only safe pointer |
| 1769 | * to keep as a bookmark is a NET_CLIENT_DRIVER_NIC entry, so keep |
| 1770 | * 'p' pointing to either the head of the list, or the 'next' field |
| 1771 | * of the latest NET_CLIENT_DRIVER_NIC, and operate on *p as we walk |
| 1772 | * the list. |
| 1773 | * |
| 1774 | * However, the NIC may have peers that trust to be clean beyond this |
| 1775 | * point. For example, if they have been removed with device_del. |
| 1776 | * |
| 1777 | * The 'nc' variable isn't part of the list traversal; it's purely |
| 1778 | * for convenience as too much '(*p)->' has a tendency to make the |
| 1779 | * readers' eyes bleed. |
| 1780 | */ |
| 1781 | while (*p) { |
| 1782 | nc = *p; |
| 1783 | if (nc->info->type == NET_CLIENT_DRIVER_NIC) { |
| 1784 | NICState *nic = qemu_get_nic(nc); |
| 1785 | |
| 1786 | if (nic->peer_deleted) { |
| 1787 | int queues = MAX(nic->conf->peers.queues, 1); |
| 1788 | |
| 1789 | for (int i = 0; i < queues; i++) { |
| 1790 | nc = qemu_get_subqueue(nic, i); |
| 1791 | qemu_cleanup_net_client(nc->peer, false); |
| 1792 | } |
| 1793 | } |
| 1794 | |
| 1795 | /* Skip NET_CLIENT_DRIVER_NIC entries */ |
| 1796 | p = &QTAILQ_NEXT(nc, next); |
| 1797 | } else { |
| 1798 | qemu_del_net_client(nc); |
| 1799 | } |
| 1800 | } |
| 1801 | |
| 1802 | qemu_del_vm_change_state_handler(net_change_state_entry); |
| 1803 | } |
| 1804 | |
| 1805 | void net_check_clients(void) |
| 1806 | { |
| 1807 | NetClientState *nc; |
| 1808 | int i; |
| 1809 | |
| 1810 | if (nic_model_help) { |
| 1811 | show_nic_models(); |
| 1812 | exit(0); |
| 1813 | } |
| 1814 | net_hub_check_clients(); |
| 1815 | |
| 1816 | QTAILQ_FOREACH(nc, &net_clients, next) { |
| 1817 | if (!nc->peer) { |
| 1818 | warn_report("%s %s has no peer", |
| 1819 | nc->info->type == NET_CLIENT_DRIVER_NIC |
| 1820 | ? "nic" : "netdev", |
| 1821 | nc->name); |
| 1822 | } |
| 1823 | } |
| 1824 | |
| 1825 | /* Check that all NICs requested via -net nic actually got created. |
| 1826 | * NICs created via -device don't need to be checked here because |
| 1827 | * they are always instantiated. |
| 1828 | */ |
| 1829 | for (i = 0; i < MAX_NICS; i++) { |
| 1830 | NICInfo *nd = &nd_table[i]; |
| 1831 | if (nd->used && !nd->instantiated) { |
| 1832 | warn_report("requested NIC (%s, model %s) " |
| 1833 | "was not created (not supported by this machine?)", |
| 1834 | nd->name ? nd->name : "anonymous", |
| 1835 | nd->model ? nd->model : "unspecified"); |
| 1836 | } |
| 1837 | } |
| 1838 | } |
| 1839 | |
| 1840 | static int net_init_client(void *dummy, QemuOpts *opts, Error **errp) |
| 1841 | { |
| 1842 | const char *model = qemu_opt_get(opts, "model"); |
| 1843 | |
| 1844 | if (is_nic_model_help_option(model)) { |
| 1845 | return 0; |
| 1846 | } |
| 1847 | |
| 1848 | return net_client_init(opts, false, errp); |
| 1849 | } |
| 1850 | |
| 1851 | static int net_init_netdev(void *dummy, QemuOpts *opts, Error **errp) |
| 1852 | { |
| 1853 | const char *type = qemu_opt_get(opts, "type"); |
| 1854 | |
| 1855 | if (type && is_help_option(type)) { |
| 1856 | show_netdevs(); |
| 1857 | exit(0); |
| 1858 | } |
| 1859 | return net_client_init(opts, true, errp); |
| 1860 | } |
| 1861 | |
| 1862 | /* For the convenience "--nic" parameter */ |
| 1863 | static int net_param_nic(void *dummy, QemuOpts *opts, Error **errp) |
| 1864 | { |
| 1865 | char *mac, *nd_id; |
| 1866 | int idx, ret; |
| 1867 | NICInfo *ni; |
| 1868 | const char *type; |
| 1869 | |
| 1870 | type = qemu_opt_get(opts, "type"); |
| 1871 | if (type) { |
| 1872 | if (g_str_equal(type, "none")) { |
| 1873 | return 0; /* Nothing to do, default_net is cleared in vl.c */ |
| 1874 | } |
| 1875 | if (is_help_option(type)) { |
| 1876 | GPtrArray *nic_models = qemu_get_nic_models(TYPE_DEVICE); |
| 1877 | int i; |
| 1878 | show_netdevs(); |
| 1879 | printf("\n"); |
| 1880 | printf("Available NIC models " |
| 1881 | "(use -nic model=help for a filtered list):\n"); |
| 1882 | for (i = 0 ; nic_models->pdata[i]; i++) { |
| 1883 | printf("%s\n", (char *)nic_models->pdata[i]); |
| 1884 | } |
| 1885 | g_ptr_array_free(nic_models, true); |
| 1886 | exit(0); |
| 1887 | } |
| 1888 | } |
| 1889 | |
| 1890 | idx = nic_get_free_idx(); |
| 1891 | if (idx == -1 || nb_nics >= MAX_NICS) { |
| 1892 | error_setg(errp, "no more on-board/default NIC slots available"); |
| 1893 | return -1; |
| 1894 | } |
| 1895 | |
| 1896 | if (!type) { |
| 1897 | qemu_opt_set(opts, "type", "user", &error_abort); |
| 1898 | } |
| 1899 | |
| 1900 | ni = &nd_table[idx]; |
| 1901 | memset(ni, 0, sizeof(*ni)); |
| 1902 | ni->model = qemu_opt_get_del(opts, "model"); |
| 1903 | |
| 1904 | if (is_nic_model_help_option(ni->model)) { |
| 1905 | return 0; |
| 1906 | } |
| 1907 | |
| 1908 | /* Create an ID if the user did not specify one */ |
| 1909 | nd_id = g_strdup(qemu_opts_id(opts)); |
| 1910 | if (!nd_id) { |
| 1911 | nd_id = id_generate(ID_NET); |
| 1912 | qemu_opts_set_id(opts, nd_id); |
| 1913 | } |
| 1914 | |
| 1915 | /* Handle MAC address */ |
| 1916 | mac = qemu_opt_get_del(opts, "mac"); |
| 1917 | if (mac) { |
| 1918 | ret = net_parse_macaddr(ni->macaddr.a, mac); |
| 1919 | g_free(mac); |
| 1920 | if (ret) { |
| 1921 | error_setg(errp, "invalid syntax for ethernet address"); |
| 1922 | goto out; |
| 1923 | } |
| 1924 | if (is_multicast_ether_addr(ni->macaddr.a)) { |
| 1925 | error_setg(errp, "NIC cannot have multicast MAC address"); |
| 1926 | ret = -1; |
| 1927 | goto out; |
| 1928 | } |
| 1929 | } |
| 1930 | qemu_macaddr_default_if_unset(&ni->macaddr); |
| 1931 | |
| 1932 | ret = net_client_init(opts, true, errp); |
| 1933 | if (ret == 0) { |
| 1934 | ni->netdev = qemu_find_netdev(nd_id); |
| 1935 | ni->used = true; |
| 1936 | nb_nics++; |
| 1937 | } |
| 1938 | |
| 1939 | out: |
| 1940 | g_free(nd_id); |
| 1941 | return ret; |
| 1942 | } |
| 1943 | |
| 1944 | static void netdev_init_modern(void) |
| 1945 | { |
| 1946 | while (!QSIMPLEQ_EMPTY(&nd_queue)) { |
| 1947 | NetdevQueueEntry *nd = QSIMPLEQ_FIRST(&nd_queue); |
| 1948 | |
| 1949 | QSIMPLEQ_REMOVE_HEAD(&nd_queue, entry); |
| 1950 | loc_push_restore(&nd->loc); |
| 1951 | net_client_init1(nd->nd, true, &error_fatal); |
| 1952 | loc_pop(&nd->loc); |
| 1953 | qapi_free_Netdev(nd->nd); |
| 1954 | g_free(nd); |
| 1955 | } |
| 1956 | } |
| 1957 | |
| 1958 | void net_init_clients(void) |
| 1959 | { |
| 1960 | net_change_state_entry = |
| 1961 | qemu_add_vm_change_state_handler(net_vm_change_state_handler, NULL); |
| 1962 | |
| 1963 | QTAILQ_INIT(&net_clients); |
| 1964 | |
| 1965 | netdev_init_modern(); |
| 1966 | |
| 1967 | qemu_opts_foreach(qemu_find_opts("netdev"), net_init_netdev, NULL, |
| 1968 | &error_fatal); |
| 1969 | |
| 1970 | qemu_opts_foreach(qemu_find_opts("nic"), net_param_nic, NULL, |
| 1971 | &error_fatal); |
| 1972 | |
| 1973 | qemu_opts_foreach(qemu_find_opts("net"), net_init_client, NULL, |
| 1974 | &error_fatal); |
| 1975 | } |
| 1976 | |
| 1977 | /* |
| 1978 | * Does this -netdev argument use modern rather than traditional syntax? |
| 1979 | * Modern syntax is to be parsed with netdev_parse_modern(). |
| 1980 | * Traditional syntax is to be parsed with net_client_parse(). |
| 1981 | */ |
| 1982 | bool netdev_is_modern(const char *optstr) |
| 1983 | { |
| 1984 | QemuOpts *opts; |
| 1985 | bool is_modern; |
| 1986 | const char *type; |
| 1987 | static QemuOptsList dummy_opts = { |
| 1988 | .name = "netdev", |
| 1989 | .implied_opt_name = "type", |
| 1990 | .head = QTAILQ_HEAD_INITIALIZER(dummy_opts.head), |
| 1991 | .desc = { { } }, |
| 1992 | }; |
| 1993 | |
| 1994 | if (optstr[0] == '{') { |
| 1995 | /* This is JSON, which means it's modern syntax */ |
| 1996 | return true; |
| 1997 | } |
| 1998 | |
| 1999 | opts = qemu_opts_create(&dummy_opts, NULL, false, &error_abort); |
| 2000 | qemu_opts_do_parse(opts, optstr, dummy_opts.implied_opt_name, |
| 2001 | &error_abort); |
| 2002 | type = qemu_opt_get(opts, "type"); |
| 2003 | is_modern = !g_strcmp0(type, "stream") || !g_strcmp0(type, "dgram"); |
| 2004 | |
| 2005 | qemu_opts_reset(&dummy_opts); |
| 2006 | |
| 2007 | return is_modern; |
| 2008 | } |
| 2009 | |
| 2010 | /* |
| 2011 | * netdev_parse_modern() uses modern, more expressive syntax than |
| 2012 | * net_client_parse(), but supports only the -netdev option. |
| 2013 | * netdev_parse_modern() appends to @nd_queue, whereas net_client_parse() |
| 2014 | * appends to @qemu_netdev_opts. |
| 2015 | */ |
| 2016 | void netdev_parse_modern(const char *optstr) |
| 2017 | { |
| 2018 | Visitor *v; |
| 2019 | NetdevQueueEntry *nd; |
| 2020 | |
| 2021 | v = qobject_input_visitor_new_str(optstr, "type", &error_fatal); |
| 2022 | nd = g_new(NetdevQueueEntry, 1); |
| 2023 | visit_type_Netdev(v, NULL, &nd->nd, &error_fatal); |
| 2024 | visit_free(v); |
| 2025 | loc_save(&nd->loc); |
| 2026 | |
| 2027 | QSIMPLEQ_INSERT_TAIL(&nd_queue, nd, entry); |
| 2028 | } |
| 2029 | |
| 2030 | void net_client_parse(QemuOptsList *opts_list, const char *optstr) |
| 2031 | { |
| 2032 | if (!qemu_opts_parse_noisily(opts_list, optstr, true)) { |
| 2033 | exit(1); |
| 2034 | } |
| 2035 | } |
| 2036 | |
| 2037 | /* From FreeBSD */ |
| 2038 | /* XXX: optimize */ |
| 2039 | uint32_t net_crc32(const uint8_t *p, int len) |
| 2040 | { |
| 2041 | uint32_t crc; |
| 2042 | int carry, i, j; |
| 2043 | uint8_t b; |
| 2044 | |
| 2045 | crc = 0xffffffff; |
| 2046 | for (i = 0; i < len; i++) { |
| 2047 | b = *p++; |
| 2048 | for (j = 0; j < 8; j++) { |
| 2049 | carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01); |
| 2050 | crc <<= 1; |
| 2051 | b >>= 1; |
| 2052 | if (carry) { |
| 2053 | crc = ((crc ^ POLYNOMIAL_BE) | carry); |
| 2054 | } |
| 2055 | } |
| 2056 | } |
| 2057 | |
| 2058 | return crc; |
| 2059 | } |
| 2060 | |
| 2061 | uint32_t net_crc32_le(const uint8_t *p, int len) |
| 2062 | { |
| 2063 | uint32_t crc; |
| 2064 | int carry, i, j; |
| 2065 | uint8_t b; |
| 2066 | |
| 2067 | crc = 0xffffffff; |
| 2068 | for (i = 0; i < len; i++) { |
| 2069 | b = *p++; |
| 2070 | for (j = 0; j < 8; j++) { |
| 2071 | carry = (crc & 0x1) ^ (b & 0x01); |
| 2072 | crc >>= 1; |
| 2073 | b >>= 1; |
| 2074 | if (carry) { |
| 2075 | crc ^= POLYNOMIAL_LE; |
| 2076 | } |
| 2077 | } |
| 2078 | } |
| 2079 | |
| 2080 | return crc; |
| 2081 | } |
| 2082 | |
| 2083 | QemuOptsList qemu_netdev_opts = { |
| 2084 | .name = "netdev", |
| 2085 | .implied_opt_name = "type", |
| 2086 | .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head), |
| 2087 | .desc = { |
| 2088 | /* |
| 2089 | * no elements => accept any params |
| 2090 | * validation will happen later |
| 2091 | */ |
| 2092 | { /* end of list */ } |
| 2093 | }, |
| 2094 | }; |
| 2095 | |
| 2096 | QemuOptsList qemu_nic_opts = { |
| 2097 | .name = "nic", |
| 2098 | .implied_opt_name = "type", |
| 2099 | .head = QTAILQ_HEAD_INITIALIZER(qemu_nic_opts.head), |
| 2100 | .desc = { |
| 2101 | /* |
| 2102 | * no elements => accept any params |
| 2103 | * validation will happen later |
| 2104 | */ |
| 2105 | { /* end of list */ } |
| 2106 | }, |
| 2107 | }; |
| 2108 | |
| 2109 | QemuOptsList qemu_net_opts = { |
| 2110 | .name = "net", |
| 2111 | .implied_opt_name = "type", |
| 2112 | .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head), |
| 2113 | .desc = { |
| 2114 | /* |
| 2115 | * no elements => accept any params |
| 2116 | * validation will happen later |
| 2117 | */ |
| 2118 | { /* end of list */ } |
| 2119 | }, |
| 2120 | }; |
| 2121 | |
| 2122 | void net_socket_rs_init(SocketReadState *rs, |
| 2123 | SocketReadStateFinalize *finalize, |
| 2124 | bool vnet_hdr) |
| 2125 | { |
| 2126 | rs->state = 0; |
| 2127 | rs->vnet_hdr = vnet_hdr; |
| 2128 | rs->index = 0; |
| 2129 | rs->packet_len = 0; |
| 2130 | rs->vnet_hdr_len = 0; |
| 2131 | memset(rs->buf, 0, sizeof(rs->buf)); |
| 2132 | rs->finalize = finalize; |
| 2133 | } |
| 2134 | |
| 2135 | /* |
| 2136 | * Returns |
| 2137 | * 0: success |
| 2138 | * -1: error occurs |
| 2139 | */ |
| 2140 | int net_fill_rstate(SocketReadState *rs, const uint8_t *buf, int size) |
| 2141 | { |
| 2142 | unsigned int l; |
| 2143 | |
| 2144 | while (size > 0) { |
| 2145 | /* Reassemble a packet from the network. |
| 2146 | * 0 = getting length. |
| 2147 | * 1 = getting vnet header length. |
| 2148 | * 2 = getting data. |
| 2149 | */ |
| 2150 | switch (rs->state) { |
| 2151 | case 0: |
| 2152 | l = 4 - rs->index; |
| 2153 | if (l > size) { |
| 2154 | l = size; |
| 2155 | } |
| 2156 | memcpy(rs->buf + rs->index, buf, l); |
| 2157 | buf += l; |
| 2158 | size -= l; |
| 2159 | rs->index += l; |
| 2160 | if (rs->index == 4) { |
| 2161 | /* got length */ |
| 2162 | rs->packet_len = ntohl(*(uint32_t *)rs->buf); |
| 2163 | rs->index = 0; |
| 2164 | if (rs->vnet_hdr) { |
| 2165 | rs->state = 1; |
| 2166 | } else { |
| 2167 | rs->state = 2; |
| 2168 | rs->vnet_hdr_len = 0; |
| 2169 | } |
| 2170 | } |
| 2171 | break; |
| 2172 | case 1: |
| 2173 | l = 4 - rs->index; |
| 2174 | if (l > size) { |
| 2175 | l = size; |
| 2176 | } |
| 2177 | memcpy(rs->buf + rs->index, buf, l); |
| 2178 | buf += l; |
| 2179 | size -= l; |
| 2180 | rs->index += l; |
| 2181 | if (rs->index == 4) { |
| 2182 | /* got vnet header length */ |
| 2183 | rs->vnet_hdr_len = ntohl(*(uint32_t *)rs->buf); |
| 2184 | rs->index = 0; |
| 2185 | rs->state = 2; |
| 2186 | } |
| 2187 | break; |
| 2188 | case 2: |
| 2189 | l = rs->packet_len - rs->index; |
| 2190 | if (l > size) { |
| 2191 | l = size; |
| 2192 | } |
| 2193 | if (rs->index + l <= sizeof(rs->buf)) { |
| 2194 | memcpy(rs->buf + rs->index, buf, l); |
| 2195 | } else { |
| 2196 | fprintf(stderr, "serious error: oversized packet received," |
| 2197 | "connection terminated.\n"); |
| 2198 | rs->index = rs->state = 0; |
| 2199 | return -1; |
| 2200 | } |
| 2201 | |
| 2202 | rs->index += l; |
| 2203 | buf += l; |
| 2204 | size -= l; |
| 2205 | if (rs->index >= rs->packet_len) { |
| 2206 | rs->index = 0; |
| 2207 | rs->state = 0; |
| 2208 | assert(rs->finalize); |
| 2209 | rs->finalize(rs); |
| 2210 | } |
| 2211 | break; |
| 2212 | } |
| 2213 | } |
| 2214 | |
| 2215 | assert(size == 0); |
| 2216 | return 0; |
| 2217 | } |