device.c

   1 /*
   2  * netifd - network interface daemon
   3  * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2
   7  * as published by the Free Software Foundation
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14 #include <string.h>
  15 #include <stdlib.h>
  16 #include <stdio.h>
  17 #include <assert.h>
  18
  19 #include <sys/types.h>
  20 #include <sys/socket.h>
  21 #include <net/ethernet.h>
  22
  23 #ifdef linux
  24 #include <netinet/ether.h>
  25 #endif
  26
  27 #include <libubox/list.h>
  28
  29 #include "netifd.h"
  30 #include "system.h"
  31 #include "config.h"
  32
  33 static struct list_head devtypes = LIST_HEAD_INIT(devtypes);
  34 static struct avl_tree devices;
  35 static bool default_ps = true;
  36
  37 static const struct blobmsg_policy dev_attrs[__DEV_ATTR_MAX] = {
  38         [DEV_ATTR_TYPE] = { .name = "type", .type = BLOBMSG_TYPE_STRING },
  39         [DEV_ATTR_MTU] = { .name = "mtu", .type = BLOBMSG_TYPE_INT32 },
  40         [DEV_ATTR_MTU6] = { .name = "mtu6", .type = BLOBMSG_TYPE_INT32 },
  41         [DEV_ATTR_MACADDR] = { .name = "macaddr", .type = BLOBMSG_TYPE_STRING },
  42         [DEV_ATTR_TXQUEUELEN] = { .name = "txqueuelen", .type = BLOBMSG_TYPE_INT32 },
  43         [DEV_ATTR_ENABLED] = { .name = "enabled", .type = BLOBMSG_TYPE_BOOL },
  44         [DEV_ATTR_IPV6] = { .name = "ipv6", .type = BLOBMSG_TYPE_BOOL },
  45         [DEV_ATTR_PROMISC] = { .name = "promisc", .type = BLOBMSG_TYPE_BOOL },
  46         [DEV_ATTR_RPFILTER] = { .name = "rpfilter", .type = BLOBMSG_TYPE_STRING },
  47         [DEV_ATTR_ACCEPTLOCAL] = { .name = "acceptlocal", .type = BLOBMSG_TYPE_BOOL },
  48         [DEV_ATTR_IGMPVERSION] = { .name = "igmpversion", .type = BLOBMSG_TYPE_INT32 },
  49         [DEV_ATTR_MLDVERSION] = { .name = "mldversion", .type = BLOBMSG_TYPE_INT32 },
  50         [DEV_ATTR_NEIGHREACHABLETIME] = { .name = "neighreachabletime", .type = BLOBMSG_TYPE_INT32 },
  51         [DEV_ATTR_NEIGHGCSTALETIME] = { .name = "neighgcstaletime", .type = BLOBMSG_TYPE_INT32 },
  52         [DEV_ATTR_RPS] = { .name = "rps", .type = BLOBMSG_TYPE_BOOL },
  53         [DEV_ATTR_XPS] = { .name = "xps", .type = BLOBMSG_TYPE_BOOL },
  54         [DEV_ATTR_DADTRANSMITS] = { .name = "dadtransmits", .type = BLOBMSG_TYPE_INT32 },
  55         [DEV_ATTR_MULTICAST_TO_UNICAST] = { .name = "multicast_to_unicast", .type = BLOBMSG_TYPE_BOOL },
  56         [DEV_ATTR_MULTICAST_ROUTER] = { .name = "multicast_router", .type = BLOBMSG_TYPE_INT32 },
  57         [DEV_ATTR_MULTICAST] = { .name ="multicast", .type = BLOBMSG_TYPE_BOOL },
  58         [DEV_ATTR_LEARNING] = { .name ="learning", .type = BLOBMSG_TYPE_BOOL },
  59         [DEV_ATTR_UNICAST_FLOOD] = { .name ="unicast_flood", .type = BLOBMSG_TYPE_BOOL },
  60 };
  61
  62 const struct uci_blob_param_list device_attr_list = {
  63         .n_params = __DEV_ATTR_MAX,
  64         .params = dev_attrs,
  65 };
  66
  67 static int __devlock = 0;
  68
  69 int device_type_add(struct device_type *devtype)
  70 {
  71         if (device_type_get(devtype->name)) {
  72                 netifd_log_message(L_WARNING, "Device handler '%s' already exists\n",
  73                                    devtype->name);
  74                 return 1;
  75         }
  76
  77         netifd_log_message(L_NOTICE, "Added device handler type: %s\n",
  78                 devtype->name);
  79
  80         list_add(&devtype->list, &devtypes);
  81         return 0;
  82 }
  83
  84 /* initialize device type list and add known types */
  85 static void __init devtypes_init(void)
  86 {
  87         device_type_add(&simple_device_type);
  88         device_type_add(&bridge_device_type);
  89         device_type_add(&tunnel_device_type);
  90         device_type_add(&macvlan_device_type);
  91         device_type_add(&vlandev_device_type);
  92 }
  93
  94 /* Retrieve the device type for the given name. If 'bridge' is true, the type
  95  * must have bridge capabilities
  96  */
  97 struct device_type *
  98 device_type_get(const char *tname)
  99 {
 100         struct device_type *cur;
 101
 102         list_for_each_entry(cur, &devtypes, list)
 103                 if (!strcmp(cur->name, tname))
 104                         return cur;
 105
 106         return NULL;
 107 }
 108
 109 void device_lock(void)
 110 {
 111         __devlock++;
 112 }
 113
 114 void device_unlock(void)
 115 {
 116         __devlock--;
 117         if (!__devlock)
 118                 device_free_unused(NULL);
 119 }
 120
 121 static int set_device_state(struct device *dev, bool state)
 122 {
 123         if (state) {
 124                 /* Get ifindex for all devices being enabled so a valid  */
 125                 /* ifindex is in place avoiding possible race conditions */
 126                 device_set_ifindex(dev, system_if_resolve(dev));
 127                 if (!dev->ifindex)
 128                         return -1;
 129
 130                 system_if_up(dev);
 131         }
 132         else
 133                 system_if_down(dev);
 134
 135         return 0;
 136 }
 137
 138 static int
 139 simple_device_set_state(struct device *dev, bool state)
 140 {
 141         struct device *pdev;
 142         int ret = 0;
 143
 144         pdev = dev->parent.dev;
 145         if (state && !pdev) {
 146                 pdev = system_if_get_parent(dev);
 147                 if (pdev)
 148                         device_add_user(&dev->parent, pdev);
 149         }
 150
 151         if (pdev) {
 152                 if (state)
 153                         ret = device_claim(&dev->parent);
 154                 else
 155                         device_release(&dev->parent);
 156
 157                 if (ret < 0)
 158                         return ret;
 159         }
 160         return set_device_state(dev, state);
 161 }
 162
 163 static struct device *
 164 simple_device_create(const char *name, struct device_type *devtype,
 165                      struct blob_attr *attr)
 166 {
 167         struct blob_attr *tb[__DEV_ATTR_MAX];
 168         struct device *dev = NULL;
 169
 170         /* device type is unused for simple devices */
 171         devtype = NULL;
 172
 173         blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb, blob_data(attr), blob_len(attr));
 174         dev = device_get(name, true);
 175         if (!dev)
 176                 return NULL;
 177
 178         dev->set_state = simple_device_set_state;
 179         device_init_settings(dev, tb);
 180
 181         return dev;
 182 }
 183
 184 static void simple_device_free(struct device *dev)
 185 {
 186         if (dev->parent.dev)
 187                 device_remove_user(&dev->parent);
 188         free(dev);
 189 }
 190
 191 struct device_type simple_device_type = {
 192         .name = "Network device",
 193         .config_params = &device_attr_list,
 194
 195         .create = simple_device_create,
 196         .check_state = system_if_check,
 197         .free = simple_device_free,
 198 };
 199
 200 static void
 201 device_merge_settings(struct device *dev, struct device_settings *n)
 202 {
 203         struct device_settings *os = &dev->orig_settings;
 204         struct device_settings *s = &dev->settings;
 205
 206         memset(n, 0, sizeof(*n));
 207         n->mtu = s->flags & DEV_OPT_MTU ? s->mtu : os->mtu;
 208         n->mtu6 = s->flags & DEV_OPT_MTU6 ? s->mtu6 : os->mtu6;
 209         n->txqueuelen = s->flags & DEV_OPT_TXQUEUELEN ?
 210                 s->txqueuelen : os->txqueuelen;
 211         memcpy(n->macaddr,
 212                 (s->flags & DEV_OPT_MACADDR ? s->macaddr : os->macaddr),
 213                 sizeof(n->macaddr));
 214         n->ipv6 = s->flags & DEV_OPT_IPV6 ? s->ipv6 : os->ipv6;
 215         n->promisc = s->flags & DEV_OPT_PROMISC ? s->promisc : os->promisc;
 216         n->rpfilter = s->flags & DEV_OPT_RPFILTER ? s->rpfilter : os->rpfilter;
 217         n->acceptlocal = s->flags & DEV_OPT_ACCEPTLOCAL ? s->acceptlocal : os->acceptlocal;
 218         n->igmpversion = s->flags & DEV_OPT_IGMPVERSION ? s->igmpversion : os->igmpversion;
 219         n->mldversion = s->flags & DEV_OPT_MLDVERSION ? s->mldversion : os->mldversion;
 220         n->neigh4reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
 221                 s->neigh4reachabletime : os->neigh4reachabletime;
 222         n->neigh6reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
 223                 s->neigh6reachabletime : os->neigh6reachabletime;
 224         n->neigh4gcstaletime = s->flags & DEV_OPT_NEIGHGCSTALETIME ?
 225                 s->neigh4gcstaletime : os->neigh4gcstaletime;
 226         n->neigh6gcstaletime = s->flags & DEV_OPT_NEIGHGCSTALETIME ?
 227                 s->neigh6gcstaletime : os->neigh6gcstaletime;
 228         n->dadtransmits = s->flags & DEV_OPT_DADTRANSMITS ?
 229                 s->dadtransmits : os->dadtransmits;
 230         n->multicast = s->flags & DEV_OPT_MULTICAST ?
 231                 s->multicast : os->multicast;
 232         n->multicast_to_unicast = s->multicast_to_unicast;
 233         n->multicast_router = s->multicast_router;
 234         n->learning = s->learning;
 235         n->unicast_flood = s->unicast_flood;
 236         n->flags = s->flags | os->flags | os->valid_flags;
 237 }
 238
 239 void
 240 device_init_settings(struct device *dev, struct blob_attr **tb)
 241 {
 242         struct device_settings *s = &dev->settings;
 243         struct blob_attr *cur;
 244         struct ether_addr *ea;
 245         bool disabled = false;
 246
 247         s->flags = 0;
 248         if ((cur = tb[DEV_ATTR_ENABLED]))
 249                 disabled = !blobmsg_get_bool(cur);
 250
 251         if ((cur = tb[DEV_ATTR_MTU])) {
 252                 s->mtu = blobmsg_get_u32(cur);
 253                 s->flags |= DEV_OPT_MTU;
 254         }
 255
 256         if ((cur = tb[DEV_ATTR_MTU6])) {
 257                 s->mtu6 = blobmsg_get_u32(cur);
 258                 s->flags |= DEV_OPT_MTU6;
 259         }
 260
 261         if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
 262                 s->txqueuelen = blobmsg_get_u32(cur);
 263                 s->flags |= DEV_OPT_TXQUEUELEN;
 264         }
 265
 266         if ((cur = tb[DEV_ATTR_MACADDR])) {
 267                 ea = ether_aton(blobmsg_data(cur));
 268                 if (ea) {
 269                         memcpy(s->macaddr, ea, 6);
 270                         s->flags |= DEV_OPT_MACADDR;
 271                 }
 272         }
 273
 274         if ((cur = tb[DEV_ATTR_IPV6])) {
 275                 s->ipv6 = blobmsg_get_bool(cur);
 276                 s->flags |= DEV_OPT_IPV6;
 277         }
 278
 279         if ((cur = tb[DEV_ATTR_PROMISC])) {
 280                 s->promisc = blobmsg_get_bool(cur);
 281                 s->flags |= DEV_OPT_PROMISC;
 282         }
 283
 284         if ((cur = tb[DEV_ATTR_RPFILTER])) {
 285                 if (system_resolve_rpfilter(blobmsg_data(cur), &s->rpfilter))
 286                         s->flags |= DEV_OPT_RPFILTER;
 287                 else
 288                         DPRINTF("Failed to resolve rpfilter: %s\n", (char *) blobmsg_data(cur));
 289         }
 290
 291         if ((cur = tb[DEV_ATTR_ACCEPTLOCAL])) {
 292                 s->acceptlocal = blobmsg_get_bool(cur);
 293                 s->flags |= DEV_OPT_ACCEPTLOCAL;
 294         }
 295
 296         if ((cur = tb[DEV_ATTR_IGMPVERSION])) {
 297                 s->igmpversion = blobmsg_get_u32(cur);
 298                 if (s->igmpversion >= 1 && s->igmpversion <= 3)
 299                         s->flags |= DEV_OPT_IGMPVERSION;
 300                 else
 301                         DPRINTF("Failed to resolve igmpversion: %d\n", blobmsg_get_u32(cur));
 302         }
 303
 304         if ((cur = tb[DEV_ATTR_MLDVERSION])) {
 305                 s->mldversion = blobmsg_get_u32(cur);
 306                 if (s->mldversion >= 1 && s->mldversion <= 2)
 307                         s->flags |= DEV_OPT_MLDVERSION;
 308                 else
 309                         DPRINTF("Failed to resolve mldversion: %d\n", blobmsg_get_u32(cur));
 310         }
 311
 312         if ((cur = tb[DEV_ATTR_NEIGHREACHABLETIME])) {
 313                 s->neigh6reachabletime = s->neigh4reachabletime = blobmsg_get_u32(cur);
 314                 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
 315         }
 316
 317         if ((cur = tb[DEV_ATTR_NEIGHGCSTALETIME])) {
 318                 s->neigh6gcstaletime = s->neigh4gcstaletime = blobmsg_get_u32(cur);
 319                 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
 320         }
 321
 322         if ((cur = tb[DEV_ATTR_RPS])) {
 323                 s->rps = blobmsg_get_bool(cur);
 324                 s->flags |= DEV_OPT_RPS;
 325         }
 326         else
 327                 s->rps = default_ps;
 328
 329         if ((cur = tb[DEV_ATTR_XPS])) {
 330                 s->xps = blobmsg_get_bool(cur);
 331                 s->flags |= DEV_OPT_XPS;
 332         }
 333         else
 334                 s->xps = default_ps;
 335
 336         if ((cur = tb[DEV_ATTR_DADTRANSMITS])) {
 337                 s->dadtransmits = blobmsg_get_u32(cur);
 338                 s->flags |= DEV_OPT_DADTRANSMITS;
 339         }
 340
 341         if ((cur = tb[DEV_ATTR_MULTICAST_TO_UNICAST])) {
 342                 s->multicast_to_unicast = blobmsg_get_bool(cur);
 343                 s->flags |= DEV_OPT_MULTICAST_TO_UNICAST;
 344         }
 345
 346         if ((cur = tb[DEV_ATTR_MULTICAST_ROUTER])) {
 347                 s->multicast_router = blobmsg_get_u32(cur);
 348                 if (s->multicast_router <= 2)
 349                         s->flags |= DEV_OPT_MULTICAST_ROUTER;
 350                 else
 351                         DPRINTF("Invalid value: %d - (Use 0: never, 1: learn, 2: always)\n", blobmsg_get_u32(cur));
 352         }
 353
 354         if ((cur = tb[DEV_ATTR_MULTICAST])) {
 355                 s->multicast = blobmsg_get_bool(cur);
 356                 s->flags |= DEV_OPT_MULTICAST;
 357         }
 358
 359         if ((cur = tb[DEV_ATTR_LEARNING])) {
 360                 s->learning = blobmsg_get_bool(cur);
 361                 s->flags |= DEV_OPT_LEARNING;
 362         }
 363
 364         if ((cur = tb[DEV_ATTR_UNICAST_FLOOD])) {
 365                 s->unicast_flood = blobmsg_get_bool(cur);
 366                 s->flags |= DEV_OPT_UNICAST_FLOOD;
 367         }
 368
 369         device_set_disabled(dev, disabled);
 370 }
 371
 372 static void __init dev_init(void)
 373 {
 374         avl_init(&devices, avl_strcmp, true, NULL);
 375 }
 376
 377 static int device_broadcast_cb(void *ctx, struct safe_list *list)
 378 {
 379         struct device_user *dep = container_of(list, struct device_user, list);
 380         int *ev = ctx;
 381
 382         /* device might have been removed by an earlier callback */
 383         if (!dep->dev)
 384                 return 0;
 385
 386         if (dep->cb)
 387                 dep->cb(dep, *ev);
 388         return 0;
 389 }
 390
 391 void device_broadcast_event(struct device *dev, enum device_event ev)
 392 {
 393         int dev_ev = ev;
 394
 395         safe_list_for_each(&dev->aliases, device_broadcast_cb, &dev_ev);
 396         safe_list_for_each(&dev->users, device_broadcast_cb, &dev_ev);
 397 }
 398
 399 int device_claim(struct device_user *dep)
 400 {
 401         struct device *dev = dep->dev;
 402         int ret = 0;
 403
 404         if (dep->claimed)
 405                 return 0;
 406
 407         if (!dev)
 408                 return -1;
 409
 410         dep->claimed = true;
 411         D(DEVICE, "Claim %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active + 1);
 412         if (++dev->active != 1)
 413                 return 0;
 414
 415         device_broadcast_event(dev, DEV_EVENT_SETUP);
 416         if (dev->external) {
 417                 /* Get ifindex for external claimed devices so a valid   */
 418                 /* ifindex is in place avoiding possible race conditions */
 419                 device_set_ifindex(dev, system_if_resolve(dev));
 420                 if (!dev->ifindex)
 421                         ret = -1;
 422
 423                 system_if_get_settings(dev, &dev->orig_settings);
 424         } else
 425                 ret = dev->set_state(dev, true);
 426
 427         if (ret == 0)
 428                 device_broadcast_event(dev, DEV_EVENT_UP);
 429         else {
 430                 D(DEVICE, "claim %s %s failed: %d\n", dev->type->name, dev->ifname, ret);
 431                 dev->active = 0;
 432                 dep->claimed = false;
 433         }
 434
 435         return ret;
 436 }
 437
 438 void device_release(struct device_user *dep)
 439 {
 440         struct device *dev = dep->dev;
 441
 442         if (!dep->claimed)
 443                 return;
 444
 445         dep->claimed = false;
 446         dev->active--;
 447         D(DEVICE, "Release %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active);
 448         assert(dev->active >= 0);
 449
 450         if (dev->active)
 451                 return;
 452
 453         device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
 454         if (!dev->external)
 455                 dev->set_state(dev, false);
 456         device_broadcast_event(dev, DEV_EVENT_DOWN);
 457 }
 458
 459 int device_check_state(struct device *dev)
 460 {
 461         if (!dev->type->check_state)
 462                 return simple_device_type.check_state(dev);
 463
 464         return dev->type->check_state(dev);
 465 }
 466
 467 void device_init_virtual(struct device *dev, struct device_type *type, const char *name)
 468 {
 469         assert(dev);
 470         assert(type);
 471
 472         D(DEVICE, "Initialize device '%s'\n", name ? name : "");
 473         INIT_SAFE_LIST(&dev->users);
 474         INIT_SAFE_LIST(&dev->aliases);
 475         dev->type = type;
 476
 477         if (name)
 478                 device_set_ifname(dev, name);
 479
 480         if (!dev->set_state)
 481                 dev->set_state = set_device_state;
 482 }
 483
 484 int device_init(struct device *dev, struct device_type *type, const char *ifname)
 485 {
 486         int ret;
 487
 488         device_init_virtual(dev, type, ifname);
 489
 490         dev->avl.key = dev->ifname;
 491
 492         ret = avl_insert(&devices, &dev->avl);
 493         if (ret < 0)
 494                 return ret;
 495
 496         system_if_clear_state(dev);
 497         device_check_state(dev);
 498         dev->settings.rps = default_ps;
 499         dev->settings.xps = default_ps;
 500
 501         return 0;
 502 }
 503
 504 static struct device *
 505 device_create_default(const char *name, bool external)
 506 {
 507         struct device *dev;
 508
 509         if (!external && system_if_force_external(name))
 510                 return NULL;
 511
 512         D(DEVICE, "Create simple device '%s'\n", name);
 513         dev = calloc(1, sizeof(*dev));
 514         if (!dev)
 515                 return NULL;
 516
 517         dev->external = external;
 518         dev->set_state = simple_device_set_state;
 519         device_init(dev, &simple_device_type, name);
 520         dev->default_config = true;
 521         if (external)
 522                 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
 523         return dev;
 524 }
 525
 526 struct device *
 527 device_find(const char *name)
 528 {
 529         struct device *dev;
 530
 531         return avl_find_element(&devices, name, dev, avl);
 532 }
 533
 534 struct device *
 535 device_get(const char *name, int create)
 536 {
 537         struct device *dev;
 538
 539         if (strchr(name, '.'))
 540                 return get_vlan_device_chain(name, create);
 541
 542         if (name[0] == '@')
 543                 return device_alias_get(name + 1);
 544
 545         dev = avl_find_element(&devices, name, dev, avl);
 546         if (dev) {
 547                 if (create > 1 && !dev->external) {
 548                         system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
 549                         dev->external = true;
 550                         device_set_present(dev, true);
 551                 }
 552                 return dev;
 553         }
 554
 555         if (!create)
 556                 return NULL;
 557
 558         return device_create_default(name, create > 1);
 559 }
 560
 561 static void
 562 device_delete(struct device *dev)
 563 {
 564         if (!dev->avl.key)
 565                 return;
 566
 567         D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
 568         avl_delete(&devices, &dev->avl);
 569         dev->avl.key = NULL;
 570 }
 571
 572 static int device_cleanup_cb(void *ctx, struct safe_list *list)
 573 {
 574         struct device_user *dep = container_of(list, struct device_user, list);
 575         if (dep->cb)
 576                 dep->cb(dep, DEV_EVENT_REMOVE);
 577
 578         device_release(dep);
 579         return 0;
 580 }
 581
 582 void device_cleanup(struct device *dev)
 583 {
 584         D(DEVICE, "Clean up device '%s'\n", dev->ifname);
 585         safe_list_for_each(&dev->users, device_cleanup_cb, NULL);
 586         safe_list_for_each(&dev->aliases, device_cleanup_cb, NULL);
 587         device_delete(dev);
 588 }
 589
 590 static void __device_set_present(struct device *dev, bool state)
 591 {
 592         if (dev->present == state)
 593                 return;
 594
 595         dev->present = state;
 596         device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
 597 }
 598
 599 void
 600 device_refresh_present(struct device *dev)
 601 {
 602         bool state = dev->sys_present;
 603
 604         if (dev->disabled || dev->deferred)
 605                 state = false;
 606
 607         __device_set_present(dev, state);
 608 }
 609
 610 void device_set_present(struct device *dev, bool state)
 611 {
 612         if (dev->sys_present == state)
 613                 return;
 614
 615         D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
 616         dev->sys_present = state;
 617         device_refresh_present(dev);
 618 }
 619
 620 void device_set_link(struct device *dev, bool state)
 621 {
 622         if (dev->link_active == state)
 623                 return;
 624
 625         netifd_log_message(L_NOTICE, "%s '%s' link is %s\n", dev->type->name, dev->ifname, state ? "up" : "down" );
 626
 627         dev->link_active = state;
 628         device_broadcast_event(dev, state ? DEV_EVENT_LINK_UP : DEV_EVENT_LINK_DOWN);
 629 }
 630
 631 void device_set_ifindex(struct device *dev, int ifindex)
 632 {
 633         if (dev->ifindex == ifindex)
 634                 return;
 635
 636         dev->ifindex = ifindex;
 637         device_broadcast_event(dev, DEV_EVENT_UPDATE_IFINDEX);
 638 }
 639
 640 int device_set_ifname(struct device *dev, const char *name)
 641 {
 642         int ret = 0;
 643
 644         if (!strcmp(dev->ifname, name))
 645                 return 0;
 646
 647         if (dev->avl.key)
 648                 avl_delete(&devices, &dev->avl);
 649
 650         strncpy(dev->ifname, name, IFNAMSIZ);
 651
 652         if (dev->avl.key)
 653                 ret = avl_insert(&devices, &dev->avl);
 654
 655         if (ret == 0)
 656                 device_broadcast_event(dev, DEV_EVENT_UPDATE_IFNAME);
 657
 658         return ret;
 659 }
 660
 661 static int device_refcount(struct device *dev)
 662 {
 663         struct list_head *list;
 664         int count = 0;
 665
 666         list_for_each(list, &dev->users.list)
 667                 count++;
 668
 669         list_for_each(list, &dev->aliases.list)
 670                 count++;
 671
 672         return count;
 673 }
 674
 675 static void
 676 __device_add_user(struct device_user *dep, struct device *dev)
 677 {
 678         struct safe_list *head;
 679
 680         dep->dev = dev;
 681
 682         if (dep->alias)
 683                 head = &dev->aliases;
 684         else
 685                 head = &dev->users;
 686
 687         safe_list_add(&dep->list, head);
 688         D(DEVICE, "Add user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
 689
 690         if (dep->cb && dev->present) {
 691                 dep->cb(dep, DEV_EVENT_ADD);
 692                 if (dev->active)
 693                         dep->cb(dep, DEV_EVENT_UP);
 694
 695                 if (dev->link_active)
 696                         dep->cb(dep, DEV_EVENT_LINK_UP);
 697         }
 698 }
 699
 700 void device_add_user(struct device_user *dep, struct device *dev)
 701 {
 702         if (dep->dev == dev)
 703                 return;
 704
 705         if (dep->dev)
 706                 device_remove_user(dep);
 707
 708         if (!dev)
 709                 return;
 710
 711         __device_add_user(dep, dev);
 712 }
 713
 714 void
 715 device_free(struct device *dev)
 716 {
 717         __devlock++;
 718         free(dev->config);
 719         device_cleanup(dev);
 720         dev->type->free(dev);
 721         __devlock--;
 722 }
 723
 724 static void
 725 __device_free_unused(struct device *dev)
 726 {
 727         if (!safe_list_empty(&dev->users) ||
 728                 !safe_list_empty(&dev->aliases) ||
 729             dev->current_config || __devlock)
 730                 return;
 731
 732         device_free(dev);
 733 }
 734
 735 void device_remove_user(struct device_user *dep)
 736 {
 737         struct device *dev = dep->dev;
 738
 739         if (!dep->dev)
 740                 return;
 741
 742         dep->hotplug = false;
 743         if (dep->claimed)
 744                 device_release(dep);
 745
 746         safe_list_del(&dep->list);
 747         dep->dev = NULL;
 748         D(DEVICE, "Remove user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
 749         __device_free_unused(dev);
 750 }
 751
 752 void
 753 device_free_unused(struct device *dev)
 754 {
 755         struct device *tmp;
 756
 757         if (dev)
 758                 return __device_free_unused(dev);
 759
 760         avl_for_each_element_safe(&devices, dev, avl, tmp)
 761                 __device_free_unused(dev);
 762 }
 763
 764 void
 765 device_init_pending(void)
 766 {
 767         struct device *dev, *tmp;
 768
 769         avl_for_each_element_safe(&devices, dev, avl, tmp) {
 770                 if (!dev->config_pending)
 771                         continue;
 772
 773                 dev->type->config_init(dev);
 774                 dev->config_pending = false;
 775         }
 776 }
 777
 778 static enum dev_change_type
 779 device_set_config(struct device *dev, struct device_type *type,
 780                   struct blob_attr *attr)
 781 {
 782         struct blob_attr *tb[__DEV_ATTR_MAX];
 783         const struct uci_blob_param_list *cfg = type->config_params;
 784
 785         if (type != dev->type)
 786                 return DEV_CONFIG_RECREATE;
 787
 788         if (dev->type->reload)
 789                 return dev->type->reload(dev, attr);
 790
 791         if (uci_blob_check_equal(dev->config, attr, cfg))
 792                 return DEV_CONFIG_NO_CHANGE;
 793
 794         if (cfg == &device_attr_list) {
 795                 memset(tb, 0, sizeof(tb));
 796
 797                 if (attr)
 798                         blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
 799                                 blob_data(attr), blob_len(attr));
 800
 801                 device_init_settings(dev, tb);
 802                 return DEV_CONFIG_RESTART;
 803         } else
 804                 return DEV_CONFIG_RECREATE;
 805 }
 806
 807 enum dev_change_type
 808 device_apply_config(struct device *dev, struct device_type *type,
 809                     struct blob_attr *config)
 810 {
 811         enum dev_change_type change;
 812
 813         change = device_set_config(dev, type, config);
 814         if (dev->external) {
 815                 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
 816                 change = DEV_CONFIG_APPLIED;
 817         }
 818
 819         switch (change) {
 820                 case DEV_CONFIG_RESTART:
 821                 case DEV_CONFIG_APPLIED:
 822                         D(DEVICE, "Device '%s': config applied\n", dev->ifname);
 823                         config = blob_memdup(config);
 824                         free(dev->config);
 825                         dev->config = config;
 826                         if (change == DEV_CONFIG_RESTART && dev->present) {
 827                                 int ret = 0;
 828
 829                                 device_set_present(dev, false);
 830                                 if (dev->active && !dev->external) {
 831                                         ret = dev->set_state(dev, false);
 832                                         if (!ret)
 833                                                 ret = dev->set_state(dev, true);
 834                                 }
 835                                 if (!ret)
 836                                         device_set_present(dev, true);
 837                         }
 838                         break;
 839                 case DEV_CONFIG_NO_CHANGE:
 840                         D(DEVICE, "Device '%s': no configuration change\n", dev->ifname);
 841                         break;
 842                 case DEV_CONFIG_RECREATE:
 843                         break;
 844         }
 845
 846         return change;
 847 }
 848
 849 static void
 850 device_replace(struct device *dev, struct device *odev)
 851 {
 852         struct device_user *dep, *tmp;
 853
 854         __devlock++;
 855         if (odev->present)
 856                 device_set_present(odev, false);
 857
 858         list_for_each_entry_safe(dep, tmp, &odev->users.list, list.list) {
 859                 device_release(dep);
 860                 safe_list_del(&dep->list);
 861                 __device_add_user(dep, dev);
 862         }
 863         __devlock--;
 864
 865         device_free(odev);
 866 }
 867
 868 void
 869 device_reset_config(void)
 870 {
 871         struct device *dev;
 872
 873         avl_for_each_element(&devices, dev, avl)
 874                 dev->current_config = false;
 875 }
 876
 877 void
 878 device_reset_old(void)
 879 {
 880         struct device *dev, *tmp, *ndev;
 881
 882         avl_for_each_element_safe(&devices, dev, avl, tmp) {
 883                 if (dev->current_config || dev->default_config)
 884                         continue;
 885
 886                 if (dev->type != &simple_device_type)
 887                         continue;
 888
 889                 ndev = device_create_default(dev->ifname, dev->external);
 890                 if (!ndev)
 891                         continue;
 892
 893                 device_replace(ndev, dev);
 894         }
 895 }
 896
 897 void
 898 device_set_default_ps(bool state)
 899 {
 900         struct device *dev;
 901
 902         if (state == default_ps)
 903                 return;
 904
 905         default_ps = state;
 906
 907         avl_for_each_element(&devices, dev, avl) {
 908                 struct device_settings *s = &dev->settings;
 909                 unsigned int apply_mask = 0;
 910
 911                 if (!(s->flags & DEV_OPT_RPS)) {
 912                         s->rps = default_ps;
 913                         apply_mask |= DEV_OPT_RPS;
 914                 }
 915
 916                 if (!(s->flags & DEV_OPT_XPS)) {
 917                         s->xps = default_ps;
 918                         apply_mask |= DEV_OPT_XPS;
 919                 }
 920
 921                 if (!apply_mask)
 922                         continue;
 923
 924                 if (!(dev->external || (dev->present && dev->active)) ||
 925                                 dev->config_pending)
 926                         continue;
 927
 928                 system_if_apply_settings(dev, s, apply_mask);
 929         }
 930 }
 931
 932 struct device *
 933 device_create(const char *name, struct device_type *type,
 934               struct blob_attr *config)
 935 {
 936         struct device *odev = NULL, *dev;
 937         enum dev_change_type change;
 938
 939         odev = device_get(name, false);
 940         if (odev) {
 941                 odev->current_config = true;
 942                 change = device_apply_config(odev, type, config);
 943                 switch (change) {
 944                 case DEV_CONFIG_RECREATE:
 945                         D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
 946                         device_delete(odev);
 947                         break;
 948                 default:
 949                         return odev;
 950                 }
 951         } else
 952                 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
 953
 954         config = blob_memdup(config);
 955         if (!config)
 956                 return NULL;
 957
 958         dev = type->create(name, type, config);
 959         if (!dev)
 960                 return NULL;
 961
 962         dev->current_config = true;
 963         dev->config = config;
 964         if (odev)
 965                 device_replace(dev, odev);
 966
 967         if (!config_init && dev->config_pending) {
 968                 type->config_init(dev);
 969                 dev->config_pending = false;
 970         }
 971
 972         return dev;
 973 }
 974
 975 void
 976 device_dump_status(struct blob_buf *b, struct device *dev)
 977 {
 978         struct device_settings st;
 979         void *c, *s;
 980
 981         if (!dev) {
 982                 avl_for_each_element(&devices, dev, avl) {
 983                         if (!dev->present)
 984                                 continue;
 985                         c = blobmsg_open_table(b, dev->ifname);
 986                         device_dump_status(b, dev);
 987                         blobmsg_close_table(b, c);
 988                 }
 989
 990                 return;
 991         }
 992
 993         blobmsg_add_u8(b, "external", dev->external);
 994         blobmsg_add_u8(b, "present", dev->present);
 995         blobmsg_add_string(b, "type", dev->type->name);
 996
 997         if (!dev->present)
 998                 return;
 999
1000         blobmsg_add_u8(b, "up", !!dev->active);
1001         blobmsg_add_u8(b, "carrier", !!dev->link_active);
1002
1003         if (dev->type->dump_info)
1004                 dev->type->dump_info(dev, b);
1005         else
1006                 system_if_dump_info(dev, b);
1007
1008         if (dev->active) {
1009                 device_merge_settings(dev, &st);
1010                 if (st.flags & DEV_OPT_MTU)
1011                         blobmsg_add_u32(b, "mtu", st.mtu);
1012                 if (st.flags & DEV_OPT_MTU6)
1013                         blobmsg_add_u32(b, "mtu6", st.mtu6);
1014                 if (st.flags & DEV_OPT_MACADDR)
1015                         blobmsg_add_string(b, "macaddr", format_macaddr(st.macaddr));
1016                 if (st.flags & DEV_OPT_TXQUEUELEN)
1017                         blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
1018                 if (st.flags & DEV_OPT_IPV6)
1019                         blobmsg_add_u8(b, "ipv6", st.ipv6);
1020                 if (st.flags & DEV_OPT_PROMISC)
1021                         blobmsg_add_u8(b, "promisc", st.promisc);
1022                 if (st.flags & DEV_OPT_RPFILTER)
1023                         blobmsg_add_u32(b, "rpfilter", st.rpfilter);
1024                 if (st.flags & DEV_OPT_ACCEPTLOCAL)
1025                         blobmsg_add_u8(b, "acceptlocal", st.acceptlocal);
1026                 if (st.flags & DEV_OPT_IGMPVERSION)
1027                         blobmsg_add_u32(b, "igmpversion", st.igmpversion);
1028                 if (st.flags & DEV_OPT_MLDVERSION)
1029                         blobmsg_add_u32(b, "mldversion", st.mldversion);
1030                 if (st.flags & DEV_OPT_NEIGHREACHABLETIME) {
1031                         blobmsg_add_u32(b, "neigh4reachabletime", st.neigh4reachabletime);
1032                         blobmsg_add_u32(b, "neigh6reachabletime", st.neigh6reachabletime);
1033                 }
1034                 if (st.flags & DEV_OPT_NEIGHGCSTALETIME) {
1035                         blobmsg_add_u32(b, "neigh4gcstaletime", st.neigh4gcstaletime);
1036                         blobmsg_add_u32(b, "neigh6gcstaletime", st.neigh6gcstaletime);
1037                 }
1038                 if (st.flags & DEV_OPT_DADTRANSMITS)
1039                         blobmsg_add_u32(b, "dadtransmits", st.dadtransmits);
1040                 if (st.flags & DEV_OPT_MULTICAST_TO_UNICAST)
1041                         blobmsg_add_u8(b, "multicast_to_unicast", st.multicast_to_unicast);
1042                 if (st.flags & DEV_OPT_MULTICAST_ROUTER)
1043                         blobmsg_add_u32(b, "multicast_router", st.multicast_router);
1044                 if (st.flags & DEV_OPT_MULTICAST)
1045                         blobmsg_add_u8(b, "multicast", st.multicast);
1046                 if (st.flags & DEV_OPT_LEARNING)
1047                         blobmsg_add_u8(b, "learning", st.learning);
1048                 if (st.flags & DEV_OPT_UNICAST_FLOOD)
1049                         blobmsg_add_u8(b, "unicast_flood", st.unicast_flood);
1050         }
1051
1052         s = blobmsg_open_table(b, "statistics");
1053         if (dev->type->dump_stats)
1054                 dev->type->dump_stats(dev, b);
1055         else
1056                 system_if_dump_stats(dev, b);
1057         blobmsg_close_table(b, s);
1058 }