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 "netifd.h"
  28 #include "system.h"
  29 #include "config.h"
  30
  31 static struct avl_tree devices;
  32 static bool default_ps = true;
  33
  34 static const struct blobmsg_policy dev_attrs[__DEV_ATTR_MAX] = {
  35         [DEV_ATTR_TYPE] = { .name = "type", .type = BLOBMSG_TYPE_STRING },
  36         [DEV_ATTR_MTU] = { .name = "mtu", .type = BLOBMSG_TYPE_INT32 },
  37         [DEV_ATTR_MACADDR] = { .name = "macaddr", .type = BLOBMSG_TYPE_STRING },
  38         [DEV_ATTR_TXQUEUELEN] = { .name = "txqueuelen", .type = BLOBMSG_TYPE_INT32 },
  39         [DEV_ATTR_ENABLED] = { .name = "enabled", .type = BLOBMSG_TYPE_BOOL },
  40         [DEV_ATTR_IPV6] = { .name = "ipv6", .type = BLOBMSG_TYPE_BOOL },
  41         [DEV_ATTR_PROMISC] = { .name = "promisc", .type = BLOBMSG_TYPE_BOOL },
  42         [DEV_ATTR_RPFILTER] = { .name = "rpfilter", .type = BLOBMSG_TYPE_STRING },
  43         [DEV_ATTR_ACCEPTLOCAL] = { .name = "acceptlocal", .type = BLOBMSG_TYPE_BOOL },
  44         [DEV_ATTR_IGMPVERSION] = { .name = "igmpversion", .type = BLOBMSG_TYPE_INT32 },
  45         [DEV_ATTR_MLDVERSION] = { .name = "mldversion", .type = BLOBMSG_TYPE_INT32 },
  46         [DEV_ATTR_NEIGHREACHABLETIME] = { .name = "neighreachabletime", .type = BLOBMSG_TYPE_INT32 },
  47         [DEV_ATTR_RPS] = { .name = "rps", .type = BLOBMSG_TYPE_BOOL },
  48         [DEV_ATTR_XPS] = { .name = "xps", .type = BLOBMSG_TYPE_BOOL },
  49 };
  50
  51 const struct uci_blob_param_list device_attr_list = {
  52         .n_params = __DEV_ATTR_MAX,
  53         .params = dev_attrs,
  54 };
  55
  56 static int __devlock = 0;
  57
  58 void device_lock(void)
  59 {
  60         __devlock++;
  61 }
  62
  63 void device_unlock(void)
  64 {
  65         __devlock--;
  66         if (!__devlock)
  67                 device_free_unused(NULL);
  68 }
  69
  70 static int set_device_state(struct device *dev, bool state)
  71 {
  72         if (state) {
  73                 /* Set ifindex for all devices being enabled so a valid  */
  74                 /* ifindex is in place avoiding possible race conditions */
  75                 device_set_ifindex(dev, system_if_resolve(dev));
  76                 if (!dev->ifindex)
  77                         return -1;
  78         }
  79
  80         if (dev->external)
  81                 return 0;
  82
  83         if (state)
  84                 system_if_up(dev);
  85         else
  86                 system_if_down(dev);
  87
  88         return 0;
  89 }
  90
  91 static int
  92 simple_device_set_state(struct device *dev, bool state)
  93 {
  94         struct device *pdev;
  95         int ret = 0;
  96
  97         pdev = dev->parent.dev;
  98         if (state && !pdev) {
  99                 pdev = system_if_get_parent(dev);
 100                 if (pdev)
 101                         device_add_user(&dev->parent, pdev);
 102         }
 103
 104         if (pdev) {
 105                 if (state)
 106                         ret = device_claim(&dev->parent);
 107                 else
 108                         device_release(&dev->parent);
 109
 110                 if (ret < 0)
 111                         return ret;
 112         }
 113         return set_device_state(dev, state);
 114 }
 115
 116 static struct device *
 117 simple_device_create(const char *name, struct blob_attr *attr)
 118 {
 119         struct blob_attr *tb[__DEV_ATTR_MAX];
 120         struct device *dev = NULL;
 121
 122         blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb, blob_data(attr), blob_len(attr));
 123         dev = device_get(name, true);
 124         if (!dev)
 125                 return NULL;
 126
 127         dev->set_state = simple_device_set_state;
 128         device_init_settings(dev, tb);
 129
 130         return dev;
 131 }
 132
 133 static void simple_device_free(struct device *dev)
 134 {
 135         if (dev->parent.dev)
 136                 device_remove_user(&dev->parent);
 137         free(dev);
 138 }
 139
 140 const struct device_type simple_device_type = {
 141         .name = "Network device",
 142         .config_params = &device_attr_list,
 143
 144         .create = simple_device_create,
 145         .check_state = system_if_check,
 146         .free = simple_device_free,
 147 };
 148
 149 static void
 150 device_merge_settings(struct device *dev, struct device_settings *n)
 151 {
 152         struct device_settings *os = &dev->orig_settings;
 153         struct device_settings *s = &dev->settings;
 154
 155         memset(n, 0, sizeof(*n));
 156         n->mtu = s->flags & DEV_OPT_MTU ? s->mtu : os->mtu;
 157         n->txqueuelen = s->flags & DEV_OPT_TXQUEUELEN ?
 158                 s->txqueuelen : os->txqueuelen;
 159         memcpy(n->macaddr,
 160                 (s->flags & DEV_OPT_MACADDR ? s->macaddr : os->macaddr),
 161                 sizeof(n->macaddr));
 162         n->ipv6 = s->flags & DEV_OPT_IPV6 ? s->ipv6 : os->ipv6;
 163         n->promisc = s->flags & DEV_OPT_PROMISC ? s->promisc : os->promisc;
 164         n->rpfilter = s->flags & DEV_OPT_RPFILTER ? s->rpfilter : os->rpfilter;
 165         n->acceptlocal = s->flags & DEV_OPT_ACCEPTLOCAL ? s->acceptlocal : os->acceptlocal;
 166         n->igmpversion = s->flags & DEV_OPT_IGMPVERSION ? s->igmpversion : os->igmpversion;
 167         n->mldversion = s->flags & DEV_OPT_MLDVERSION ? s->mldversion : os->mldversion;
 168         n->neigh4reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
 169                 s->neigh4reachabletime : os->neigh4reachabletime;
 170         n->neigh6reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
 171                         s->neigh6reachabletime : os->neigh6reachabletime;
 172         n->flags = s->flags | os->flags;
 173 }
 174
 175 void
 176 device_init_settings(struct device *dev, struct blob_attr **tb)
 177 {
 178         struct device_settings *s = &dev->settings;
 179         struct blob_attr *cur;
 180         struct ether_addr *ea;
 181         bool disabled = false;
 182
 183         s->flags = 0;
 184         if ((cur = tb[DEV_ATTR_ENABLED]))
 185                 disabled = !blobmsg_get_bool(cur);
 186
 187         if ((cur = tb[DEV_ATTR_MTU])) {
 188                 s->mtu = blobmsg_get_u32(cur);
 189                 s->flags |= DEV_OPT_MTU;
 190         }
 191
 192         if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
 193                 s->txqueuelen = blobmsg_get_u32(cur);
 194                 s->flags |= DEV_OPT_TXQUEUELEN;
 195         }
 196
 197         if ((cur = tb[DEV_ATTR_MACADDR])) {
 198                 ea = ether_aton(blobmsg_data(cur));
 199                 if (ea) {
 200                         memcpy(s->macaddr, ea, 6);
 201                         s->flags |= DEV_OPT_MACADDR;
 202                 }
 203         }
 204
 205         if ((cur = tb[DEV_ATTR_IPV6])) {
 206                 s->ipv6 = blobmsg_get_bool(cur);
 207                 s->flags |= DEV_OPT_IPV6;
 208         }
 209
 210         if ((cur = tb[DEV_ATTR_PROMISC])) {
 211                 s->promisc = blobmsg_get_bool(cur);
 212                 s->flags |= DEV_OPT_PROMISC;
 213         }
 214
 215         if ((cur = tb[DEV_ATTR_RPFILTER])) {
 216                 if (system_resolve_rpfilter(blobmsg_data(cur), &s->rpfilter))
 217                         s->flags |= DEV_OPT_RPFILTER;
 218                 else
 219                         DPRINTF("Failed to resolve rpfilter: %s\n", (char *) blobmsg_data(cur));
 220         }
 221
 222         if ((cur = tb[DEV_ATTR_ACCEPTLOCAL])) {
 223                 s->acceptlocal = blobmsg_get_bool(cur);
 224                 s->flags |= DEV_OPT_ACCEPTLOCAL;
 225         }
 226
 227         if ((cur = tb[DEV_ATTR_IGMPVERSION])) {
 228                 s->igmpversion = blobmsg_get_u32(cur);
 229                 if (s->igmpversion >= 1 && s->igmpversion <= 3)
 230                         s->flags |= DEV_OPT_IGMPVERSION;
 231                 else
 232                         DPRINTF("Failed to resolve igmpversion: %d\n", blobmsg_get_u32(cur));
 233         }
 234
 235         if ((cur = tb[DEV_ATTR_MLDVERSION])) {
 236                 s->mldversion = blobmsg_get_u32(cur);
 237                 if (s->mldversion >= 1 && s->mldversion <= 2)
 238                         s->flags |= DEV_OPT_MLDVERSION;
 239                 else
 240                         DPRINTF("Failed to resolve mldversion: %d\n", blobmsg_get_u32(cur));
 241         }
 242
 243         if ((cur = tb[DEV_ATTR_NEIGHREACHABLETIME])) {
 244                 s->neigh6reachabletime = s->neigh4reachabletime = blobmsg_get_u32(cur);
 245                 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
 246         }
 247
 248         if ((cur = tb[DEV_ATTR_RPS])) {
 249                 s->rps = blobmsg_get_bool(cur);
 250                 s->flags |= DEV_OPT_RPS;
 251         }
 252         else
 253                 s->rps = default_ps;
 254
 255         if ((cur = tb[DEV_ATTR_XPS])) {
 256                 s->xps = blobmsg_get_bool(cur);
 257                 s->flags |= DEV_OPT_XPS;
 258         }
 259         else
 260                 s->xps = default_ps;
 261
 262         device_set_disabled(dev, disabled);
 263 }
 264
 265 static void __init dev_init(void)
 266 {
 267         avl_init(&devices, avl_strcmp, true, NULL);
 268 }
 269
 270 static int device_broadcast_cb(void *ctx, struct safe_list *list)
 271 {
 272         struct device_user *dep = container_of(list, struct device_user, list);
 273         int *ev = ctx;
 274
 275         /* device might have been removed by an earlier callback */
 276         if (!dep->dev)
 277                 return 0;
 278
 279         if (dep->cb)
 280                 dep->cb(dep, *ev);
 281         return 0;
 282 }
 283
 284 void device_broadcast_event(struct device *dev, enum device_event ev)
 285 {
 286         int dev_ev = ev;
 287
 288         safe_list_for_each(&dev->aliases, device_broadcast_cb, &dev_ev);
 289         safe_list_for_each(&dev->users, device_broadcast_cb, &dev_ev);
 290 }
 291
 292 int device_claim(struct device_user *dep)
 293 {
 294         struct device *dev = dep->dev;
 295         int ret;
 296
 297         if (dep->claimed)
 298                 return 0;
 299
 300         dep->claimed = true;
 301         D(DEVICE, "Claim %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active + 1);
 302         if (++dev->active != 1)
 303                 return 0;
 304
 305         device_broadcast_event(dev, DEV_EVENT_SETUP);
 306         ret = dev->set_state(dev, true);
 307         if (ret == 0)
 308                 device_broadcast_event(dev, DEV_EVENT_UP);
 309         else {
 310                 D(DEVICE, "claim %s %s failed: %d\n", dev->type->name, dev->ifname, ret);
 311                 dev->active = 0;
 312                 dep->claimed = false;
 313         }
 314
 315         return ret;
 316 }
 317
 318 void device_release(struct device_user *dep)
 319 {
 320         struct device *dev = dep->dev;
 321
 322         if (!dep->claimed)
 323                 return;
 324
 325         dep->claimed = false;
 326         dev->active--;
 327         D(DEVICE, "Release %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active);
 328         assert(dev->active >= 0);
 329
 330         if (dev->active)
 331                 return;
 332
 333         device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
 334         if (!dev->external)
 335                 dev->set_state(dev, false);
 336         device_broadcast_event(dev, DEV_EVENT_DOWN);
 337 }
 338
 339 int device_check_state(struct device *dev)
 340 {
 341         if (!dev->type->check_state)
 342                 return simple_device_type.check_state(dev);
 343
 344         return dev->type->check_state(dev);
 345 }
 346
 347 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
 348 {
 349         assert(dev);
 350         assert(type);
 351
 352         if (name)
 353                 strncpy(dev->ifname, name, IFNAMSIZ);
 354
 355         D(DEVICE, "Initialize device '%s'\n", dev->ifname);
 356         INIT_SAFE_LIST(&dev->users);
 357         INIT_SAFE_LIST(&dev->aliases);
 358         dev->type = type;
 359
 360         if (!dev->set_state)
 361                 dev->set_state = set_device_state;
 362 }
 363
 364 int device_init(struct device *dev, const struct device_type *type, const char *ifname)
 365 {
 366         int ret;
 367
 368         device_init_virtual(dev, type, ifname);
 369
 370         dev->avl.key = dev->ifname;
 371
 372         ret = avl_insert(&devices, &dev->avl);
 373         if (ret < 0)
 374                 return ret;
 375
 376         system_if_clear_state(dev);
 377         device_check_state(dev);
 378         dev->settings.rps = default_ps;
 379         dev->settings.xps = default_ps;
 380
 381         return 0;
 382 }
 383
 384 static struct device *
 385 device_create_default(const char *name, bool external)
 386 {
 387         struct device *dev;
 388
 389         if (!external && system_if_force_external(name))
 390                 return NULL;
 391
 392         D(DEVICE, "Create simple device '%s'\n", name);
 393         dev = calloc(1, sizeof(*dev));
 394         dev->external = external;
 395         dev->set_state = simple_device_set_state;
 396         device_init(dev, &simple_device_type, name);
 397         dev->default_config = true;
 398         return dev;
 399 }
 400
 401 struct device *
 402 device_get(const char *name, int create)
 403 {
 404         struct device *dev;
 405
 406         if (strchr(name, '.'))
 407                 return get_vlan_device_chain(name, create);
 408
 409         if (name[0] == '@')
 410                 return device_alias_get(name + 1);
 411
 412         dev = avl_find_element(&devices, name, dev, avl);
 413         if (dev) {
 414                 if (create > 1 && !dev->external) {
 415                         dev->external = true;
 416                         device_set_present(dev, true);
 417                 }
 418                 return dev;
 419         }
 420
 421         if (!create)
 422                 return NULL;
 423
 424         return device_create_default(name, create > 1);
 425 }
 426
 427 static void
 428 device_delete(struct device *dev)
 429 {
 430         if (!dev->avl.key)
 431                 return;
 432
 433         D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
 434         avl_delete(&devices, &dev->avl);
 435         dev->avl.key = NULL;
 436 }
 437
 438 static int device_cleanup_cb(void *ctx, struct safe_list *list)
 439 {
 440         struct device_user *dep = container_of(list, struct device_user, list);
 441         if (dep->cb)
 442                 dep->cb(dep, DEV_EVENT_REMOVE);
 443
 444         device_release(dep);
 445         return 0;
 446 }
 447
 448 void device_cleanup(struct device *dev)
 449 {
 450         D(DEVICE, "Clean up device '%s'\n", dev->ifname);
 451         safe_list_for_each(&dev->users, device_cleanup_cb, NULL);
 452         safe_list_for_each(&dev->aliases, device_cleanup_cb, NULL);
 453         device_delete(dev);
 454 }
 455
 456 static void __device_set_present(struct device *dev, bool state)
 457 {
 458         if (dev->present == state)
 459                 return;
 460
 461         dev->present = state;
 462         device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
 463 }
 464
 465 void
 466 device_refresh_present(struct device *dev)
 467 {
 468         bool state = dev->sys_present;
 469
 470         if (dev->disabled || dev->deferred)
 471                 state = false;
 472
 473         __device_set_present(dev, state);
 474 }
 475
 476 void device_set_present(struct device *dev, bool state)
 477 {
 478         if (dev->sys_present == state)
 479                 return;
 480
 481         D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
 482         dev->sys_present = state;
 483         device_refresh_present(dev);
 484 }
 485
 486 void device_set_link(struct device *dev, bool state)
 487 {
 488         if (dev->link_active == state)
 489                 return;
 490
 491         netifd_log_message(L_NOTICE, "%s '%s' link is %s\n", dev->type->name, dev->ifname, state ? "up" : "down" );
 492
 493         dev->link_active = state;
 494         device_broadcast_event(dev, state ? DEV_EVENT_LINK_UP : DEV_EVENT_LINK_DOWN);
 495 }
 496
 497 void device_set_ifindex(struct device *dev, int ifindex)
 498 {
 499         if (dev->ifindex == ifindex)
 500                 return;
 501
 502         dev->ifindex = ifindex;
 503         device_broadcast_event(dev, DEV_EVENT_UPDATE_IFINDEX);
 504 }
 505
 506 static int device_refcount(struct device *dev)
 507 {
 508         struct list_head *list;
 509         int count = 0;
 510
 511         list_for_each(list, &dev->users.list)
 512                 count++;
 513
 514         list_for_each(list, &dev->aliases.list)
 515                 count++;
 516
 517         return count;
 518 }
 519
 520 void device_add_user(struct device_user *dep, struct device *dev)
 521 {
 522         struct safe_list *head;
 523
 524         if (dep->dev == dev)
 525                 return;
 526
 527         if (dep->dev)
 528                 device_remove_user(dep);
 529
 530         if (!dev)
 531                 return;
 532
 533         dep->dev = dev;
 534
 535         if (dep->alias)
 536                 head = &dev->aliases;
 537         else
 538                 head = &dev->users;
 539
 540         safe_list_add(&dep->list, head);
 541         D(DEVICE, "Add user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
 542
 543         if (dep->cb && dev->present) {
 544                 dep->cb(dep, DEV_EVENT_ADD);
 545                 if (dev->active)
 546                         dep->cb(dep, DEV_EVENT_UP);
 547
 548                 if (dev->link_active)
 549                         dep->cb(dep, DEV_EVENT_LINK_UP);
 550         }
 551 }
 552
 553 void
 554 device_free(struct device *dev)
 555 {
 556         __devlock++;
 557         free(dev->config);
 558         device_cleanup(dev);
 559         dev->type->free(dev);
 560         __devlock--;
 561 }
 562
 563 static void
 564 __device_free_unused(struct device *dev)
 565 {
 566         if (!safe_list_empty(&dev->users) ||
 567                 !safe_list_empty(&dev->aliases) ||
 568             dev->current_config || __devlock)
 569                 return;
 570
 571         device_free(dev);
 572 }
 573
 574 void device_remove_user(struct device_user *dep)
 575 {
 576         struct device *dev = dep->dev;
 577
 578         if (!dep->dev)
 579                 return;
 580
 581         dep->hotplug = false;
 582         if (dep->claimed)
 583                 device_release(dep);
 584
 585         safe_list_del(&dep->list);
 586         dep->dev = NULL;
 587         D(DEVICE, "Remove user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
 588         __device_free_unused(dev);
 589 }
 590
 591 void
 592 device_free_unused(struct device *dev)
 593 {
 594         struct device *tmp;
 595
 596         if (dev)
 597                 return __device_free_unused(dev);
 598
 599         avl_for_each_element_safe(&devices, dev, avl, tmp)
 600                 __device_free_unused(dev);
 601 }
 602
 603 void
 604 device_init_pending(void)
 605 {
 606         struct device *dev, *tmp;
 607
 608         avl_for_each_element_safe(&devices, dev, avl, tmp) {
 609                 if (!dev->config_pending)
 610                         continue;
 611
 612                 dev->type->config_init(dev);
 613                 dev->config_pending = false;
 614         }
 615 }
 616
 617 static enum dev_change_type
 618 device_set_config(struct device *dev, const struct device_type *type,
 619                   struct blob_attr *attr)
 620 {
 621         struct blob_attr *tb[__DEV_ATTR_MAX];
 622         const struct uci_blob_param_list *cfg = type->config_params;
 623
 624         if (type != dev->type)
 625                 return DEV_CONFIG_RECREATE;
 626
 627         if (dev->type->reload)
 628                 return dev->type->reload(dev, attr);
 629
 630         if (uci_blob_check_equal(dev->config, attr, cfg))
 631                 return DEV_CONFIG_NO_CHANGE;
 632
 633         if (cfg == &device_attr_list) {
 634                 memset(tb, 0, sizeof(tb));
 635
 636                 if (attr)
 637                         blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
 638                                 blob_data(attr), blob_len(attr));
 639
 640                 device_init_settings(dev, tb);
 641                 return DEV_CONFIG_RESTART;
 642         } else
 643                 return DEV_CONFIG_RECREATE;
 644 }
 645
 646 enum dev_change_type
 647 device_apply_config(struct device *dev, const struct device_type *type,
 648                     struct blob_attr *config)
 649 {
 650         enum dev_change_type change;
 651
 652         change = device_set_config(dev, type, config);
 653         if (dev->external) {
 654                 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
 655                 change = DEV_CONFIG_APPLIED;
 656         }
 657
 658         switch (change) {
 659                 case DEV_CONFIG_RESTART:
 660                 case DEV_CONFIG_APPLIED:
 661                         D(DEVICE, "Device '%s': config applied\n", dev->ifname);
 662                         config = blob_memdup(config);
 663                         free(dev->config);
 664                         dev->config = config;
 665                         if (change == DEV_CONFIG_RESTART && dev->present) {
 666                                 device_set_present(dev, false);
 667                                 if (dev->active && !dev->external) {
 668                                         dev->set_state(dev, false);
 669                                         dev->set_state(dev, true);
 670                                 }
 671                                 device_set_present(dev, true);
 672                         }
 673                         break;
 674                 case DEV_CONFIG_NO_CHANGE:
 675                         D(DEVICE, "Device '%s': no configuration change\n", dev->ifname);
 676                         break;
 677                 case DEV_CONFIG_RECREATE:
 678                         break;
 679         }
 680
 681         return change;
 682 }
 683
 684 static void
 685 device_replace(struct device *dev, struct device *odev)
 686 {
 687         struct device_user *dep, *tmp;
 688         bool present = odev->present;
 689
 690         if (present)
 691                 device_set_present(odev, false);
 692
 693         list_for_each_entry_safe(dep, tmp, &odev->users.list, list.list) {
 694                 device_release(dep);
 695                 safe_list_del(&dep->list);
 696                 safe_list_add(&dep->list, &dev->users);
 697                 dep->dev = dev;
 698         }
 699         device_free(odev);
 700
 701         if (present)
 702                 device_set_present(dev, true);
 703 }
 704
 705 void
 706 device_reset_config(void)
 707 {
 708         struct device *dev;
 709
 710         avl_for_each_element(&devices, dev, avl)
 711                 dev->current_config = false;
 712 }
 713
 714 void
 715 device_reset_old(void)
 716 {
 717         struct device *dev, *tmp, *ndev;
 718
 719         avl_for_each_element_safe(&devices, dev, avl, tmp) {
 720                 if (dev->current_config || dev->default_config)
 721                         continue;
 722
 723                 if (dev->type != &simple_device_type)
 724                         continue;
 725
 726                 ndev = device_create_default(dev->ifname, dev->external);
 727                 device_replace(ndev, dev);
 728         }
 729 }
 730
 731 void
 732 device_set_default_ps(bool state)
 733 {
 734         struct device *dev;
 735
 736         if (state == default_ps)
 737                 return;
 738
 739         default_ps = state;
 740
 741         avl_for_each_element(&devices, dev, avl) {
 742                 struct device_settings *s = &dev->settings;
 743                 unsigned int apply_mask = 0;
 744
 745                 if (!(s->flags & DEV_OPT_RPS)) {
 746                         s->rps = default_ps;
 747                         apply_mask |= DEV_OPT_RPS;
 748                 }
 749
 750                 if (!(s->flags & DEV_OPT_XPS)) {
 751                         s->xps = default_ps;
 752                         apply_mask |= DEV_OPT_XPS;
 753                 }
 754
 755                 if (!apply_mask)
 756                         continue;
 757
 758                 if (!(dev->external || (dev->present && dev->active)) ||
 759                                 dev->config_pending)
 760                         continue;
 761
 762                 system_if_apply_settings(dev, s, apply_mask);
 763         }
 764 }
 765
 766 struct device *
 767 device_create(const char *name, const struct device_type *type,
 768               struct blob_attr *config)
 769 {
 770         struct device *odev = NULL, *dev;
 771         enum dev_change_type change;
 772
 773         odev = device_get(name, false);
 774         if (odev) {
 775                 odev->current_config = true;
 776                 change = device_apply_config(odev, type, config);
 777                 switch (change) {
 778                 case DEV_CONFIG_RECREATE:
 779                         D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
 780                         device_delete(odev);
 781                         break;
 782                 default:
 783                         return odev;
 784                 }
 785         } else
 786                 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
 787
 788         config = blob_memdup(config);
 789         if (!config)
 790                 return NULL;
 791
 792         dev = type->create(name, config);
 793         if (!dev)
 794                 return NULL;
 795
 796         dev->current_config = true;
 797         dev->config = config;
 798         if (odev)
 799                 device_replace(dev, odev);
 800
 801         if (!config_init && dev->config_pending) {
 802                 type->config_init(dev);
 803                 dev->config_pending = false;
 804         }
 805
 806         return dev;
 807 }
 808
 809 void
 810 device_dump_status(struct blob_buf *b, struct device *dev)
 811 {
 812         struct device_settings st;
 813         void *c, *s;
 814
 815         if (!dev) {
 816                 avl_for_each_element(&devices, dev, avl) {
 817                         if (!dev->present)
 818                                 continue;
 819                         c = blobmsg_open_table(b, dev->ifname);
 820                         device_dump_status(b, dev);
 821                         blobmsg_close_table(b, c);
 822                 }
 823
 824                 return;
 825         }
 826
 827         blobmsg_add_u8(b, "external", dev->external);
 828         blobmsg_add_u8(b, "present", dev->present);
 829         blobmsg_add_string(b, "type", dev->type->name);
 830
 831         if (!dev->present)
 832                 return;
 833
 834         blobmsg_add_u8(b, "up", !!dev->active);
 835         blobmsg_add_u8(b, "carrier", !!dev->link_active);
 836
 837         if (dev->type->dump_info)
 838                 dev->type->dump_info(dev, b);
 839         else
 840                 system_if_dump_info(dev, b);
 841
 842         if (dev->active) {
 843                 device_merge_settings(dev, &st);
 844                 if (st.flags & DEV_OPT_MTU)
 845                         blobmsg_add_u32(b, "mtu", st.mtu);
 846                 if (st.flags & DEV_OPT_MACADDR)
 847                         blobmsg_add_string(b, "macaddr", format_macaddr(st.macaddr));
 848                 if (st.flags & DEV_OPT_TXQUEUELEN)
 849                         blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
 850                 if (st.flags & DEV_OPT_IPV6)
 851                         blobmsg_add_u8(b, "ipv6", st.ipv6);
 852                 if (st.flags & DEV_OPT_PROMISC)
 853                         blobmsg_add_u8(b, "promisc", st.promisc);
 854                 if (st.flags & DEV_OPT_RPFILTER)
 855                         blobmsg_add_u32(b, "rpfilter", st.rpfilter);
 856                 if (st.flags & DEV_OPT_ACCEPTLOCAL)
 857                         blobmsg_add_u8(b, "acceptlocal", st.acceptlocal);
 858                 if (st.flags & DEV_OPT_IGMPVERSION)
 859                         blobmsg_add_u32(b, "igmpversion", st.igmpversion);
 860                 if (st.flags & DEV_OPT_MLDVERSION)
 861                         blobmsg_add_u32(b, "mldversion", st.mldversion);
 862                 if (st.flags & DEV_OPT_NEIGHREACHABLETIME) {
 863                         blobmsg_add_u32(b, "neigh4reachabletime", st.neigh4reachabletime);
 864                         blobmsg_add_u32(b, "neigh6reachabletime", st.neigh6reachabletime);
 865                 }
 866         }
 867
 868         s = blobmsg_open_table(b, "statistics");
 869         if (dev->type->dump_stats)
 870                 dev->type->dump_stats(dev, b);
 871         else
 872                 system_if_dump_stats(dev, b);
 873         blobmsg_close_table(b, s);
 874 }