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_MTU6] = { .name = "mtu6", .type = BLOBMSG_TYPE_INT32 },
  38         [DEV_ATTR_MACADDR] = { .name = "macaddr", .type = BLOBMSG_TYPE_STRING },
  39         [DEV_ATTR_TXQUEUELEN] = { .name = "txqueuelen", .type = BLOBMSG_TYPE_INT32 },
  40         [DEV_ATTR_ENABLED] = { .name = "enabled", .type = BLOBMSG_TYPE_BOOL },
  41         [DEV_ATTR_IPV6] = { .name = "ipv6", .type = BLOBMSG_TYPE_BOOL },
  42         [DEV_ATTR_PROMISC] = { .name = "promisc", .type = BLOBMSG_TYPE_BOOL },
  43         [DEV_ATTR_RPFILTER] = { .name = "rpfilter", .type = BLOBMSG_TYPE_STRING },
  44         [DEV_ATTR_ACCEPTLOCAL] = { .name = "acceptlocal", .type = BLOBMSG_TYPE_BOOL },
  45         [DEV_ATTR_IGMPVERSION] = { .name = "igmpversion", .type = BLOBMSG_TYPE_INT32 },
  46         [DEV_ATTR_MLDVERSION] = { .name = "mldversion", .type = BLOBMSG_TYPE_INT32 },
  47         [DEV_ATTR_NEIGHREACHABLETIME] = { .name = "neighreachabletime", .type = BLOBMSG_TYPE_INT32 },
  48         [DEV_ATTR_RPS] = { .name = "rps", .type = BLOBMSG_TYPE_BOOL },
  49         [DEV_ATTR_XPS] = { .name = "xps", .type = BLOBMSG_TYPE_BOOL },
  50         [DEV_ATTR_DADTRANSMITS] = { .name = "dadtransmits", .type = BLOBMSG_TYPE_INT32 },
  51         [DEV_ATTR_MULTICAST_TO_UNICAST] = { .name = "multicast_to_unicast", .type = BLOBMSG_TYPE_BOOL },
  52         [DEV_ATTR_MULTICAST_ROUTER] = { .name = "multicast_router", .type = BLOBMSG_TYPE_INT32 },
  53 };
  54
  55 const struct uci_blob_param_list device_attr_list = {
  56         .n_params = __DEV_ATTR_MAX,
  57         .params = dev_attrs,
  58 };
  59
  60 static int __devlock = 0;
  61
  62 void device_lock(void)
  63 {
  64         __devlock++;
  65 }
  66
  67 void device_unlock(void)
  68 {
  69         __devlock--;
  70         if (!__devlock)
  71                 device_free_unused(NULL);
  72 }
  73
  74 static int set_device_state(struct device *dev, bool state)
  75 {
  76         if (state) {
  77                 /* Get ifindex for all devices being enabled so a valid  */
  78                 /* ifindex is in place avoiding possible race conditions */
  79                 device_set_ifindex(dev, system_if_resolve(dev));
  80                 if (!dev->ifindex)
  81                         return -1;
  82
  83                 system_if_up(dev);
  84         }
  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->mtu6 = s->flags & DEV_OPT_MTU6 ? s->mtu6 : os->mtu6;
 158         n->txqueuelen = s->flags & DEV_OPT_TXQUEUELEN ?
 159                 s->txqueuelen : os->txqueuelen;
 160         memcpy(n->macaddr,
 161                 (s->flags & DEV_OPT_MACADDR ? s->macaddr : os->macaddr),
 162                 sizeof(n->macaddr));
 163         n->ipv6 = s->flags & DEV_OPT_IPV6 ? s->ipv6 : os->ipv6;
 164         n->promisc = s->flags & DEV_OPT_PROMISC ? s->promisc : os->promisc;
 165         n->rpfilter = s->flags & DEV_OPT_RPFILTER ? s->rpfilter : os->rpfilter;
 166         n->acceptlocal = s->flags & DEV_OPT_ACCEPTLOCAL ? s->acceptlocal : os->acceptlocal;
 167         n->igmpversion = s->flags & DEV_OPT_IGMPVERSION ? s->igmpversion : os->igmpversion;
 168         n->mldversion = s->flags & DEV_OPT_MLDVERSION ? s->mldversion : os->mldversion;
 169         n->neigh4reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
 170                 s->neigh4reachabletime : os->neigh4reachabletime;
 171         n->neigh6reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
 172                 s->neigh6reachabletime : os->neigh6reachabletime;
 173         n->dadtransmits = s->flags & DEV_OPT_DADTRANSMITS ?
 174                 s->dadtransmits : os->dadtransmits;
 175         n->multicast_to_unicast = s->multicast_to_unicast;
 176         n->multicast_router = s->multicast_router;
 177         n->flags = s->flags | os->flags;
 178 }
 179
 180 void
 181 device_init_settings(struct device *dev, struct blob_attr **tb)
 182 {
 183         struct device_settings *s = &dev->settings;
 184         struct blob_attr *cur;
 185         struct ether_addr *ea;
 186         bool disabled = false;
 187
 188         s->flags = 0;
 189         if ((cur = tb[DEV_ATTR_ENABLED]))
 190                 disabled = !blobmsg_get_bool(cur);
 191
 192         if ((cur = tb[DEV_ATTR_MTU])) {
 193                 s->mtu = blobmsg_get_u32(cur);
 194                 s->flags |= DEV_OPT_MTU;
 195         }
 196
 197         if ((cur = tb[DEV_ATTR_MTU6])) {
 198                 s->mtu6 = blobmsg_get_u32(cur);
 199                 s->flags |= DEV_OPT_MTU6;
 200         }
 201
 202         if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
 203                 s->txqueuelen = blobmsg_get_u32(cur);
 204                 s->flags |= DEV_OPT_TXQUEUELEN;
 205         }
 206
 207         if ((cur = tb[DEV_ATTR_MACADDR])) {
 208                 ea = ether_aton(blobmsg_data(cur));
 209                 if (ea) {
 210                         memcpy(s->macaddr, ea, 6);
 211                         s->flags |= DEV_OPT_MACADDR;
 212                 }
 213         }
 214
 215         if ((cur = tb[DEV_ATTR_IPV6])) {
 216                 s->ipv6 = blobmsg_get_bool(cur);
 217                 s->flags |= DEV_OPT_IPV6;
 218         }
 219
 220         if ((cur = tb[DEV_ATTR_PROMISC])) {
 221                 s->promisc = blobmsg_get_bool(cur);
 222                 s->flags |= DEV_OPT_PROMISC;
 223         }
 224
 225         if ((cur = tb[DEV_ATTR_RPFILTER])) {
 226                 if (system_resolve_rpfilter(blobmsg_data(cur), &s->rpfilter))
 227                         s->flags |= DEV_OPT_RPFILTER;
 228                 else
 229                         DPRINTF("Failed to resolve rpfilter: %s\n", (char *) blobmsg_data(cur));
 230         }
 231
 232         if ((cur = tb[DEV_ATTR_ACCEPTLOCAL])) {
 233                 s->acceptlocal = blobmsg_get_bool(cur);
 234                 s->flags |= DEV_OPT_ACCEPTLOCAL;
 235         }
 236
 237         if ((cur = tb[DEV_ATTR_IGMPVERSION])) {
 238                 s->igmpversion = blobmsg_get_u32(cur);
 239                 if (s->igmpversion >= 1 && s->igmpversion <= 3)
 240                         s->flags |= DEV_OPT_IGMPVERSION;
 241                 else
 242                         DPRINTF("Failed to resolve igmpversion: %d\n", blobmsg_get_u32(cur));
 243         }
 244
 245         if ((cur = tb[DEV_ATTR_MLDVERSION])) {
 246                 s->mldversion = blobmsg_get_u32(cur);
 247                 if (s->mldversion >= 1 && s->mldversion <= 2)
 248                         s->flags |= DEV_OPT_MLDVERSION;
 249                 else
 250                         DPRINTF("Failed to resolve mldversion: %d\n", blobmsg_get_u32(cur));
 251         }
 252
 253         if ((cur = tb[DEV_ATTR_NEIGHREACHABLETIME])) {
 254                 s->neigh6reachabletime = s->neigh4reachabletime = blobmsg_get_u32(cur);
 255                 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
 256         }
 257
 258         if ((cur = tb[DEV_ATTR_RPS])) {
 259                 s->rps = blobmsg_get_bool(cur);
 260                 s->flags |= DEV_OPT_RPS;
 261         }
 262         else
 263                 s->rps = default_ps;
 264
 265         if ((cur = tb[DEV_ATTR_XPS])) {
 266                 s->xps = blobmsg_get_bool(cur);
 267                 s->flags |= DEV_OPT_XPS;
 268         }
 269         else
 270                 s->xps = default_ps;
 271
 272         if ((cur = tb[DEV_ATTR_DADTRANSMITS])) {
 273                 s->dadtransmits = blobmsg_get_u32(cur);
 274                 s->flags |= DEV_OPT_DADTRANSMITS;
 275         }
 276
 277         if ((cur = tb[DEV_ATTR_MULTICAST_TO_UNICAST])) {
 278                 s->multicast_to_unicast = blobmsg_get_bool(cur);
 279                 s->flags |= DEV_OPT_MULTICAST_TO_UNICAST;
 280         }
 281
 282         if ((cur = tb[DEV_ATTR_MULTICAST_ROUTER])) {
 283                 s->multicast_router = blobmsg_get_u32(cur);
 284                 if (s->multicast_router <= 2)
 285                         s->flags |= DEV_OPT_MULTICAST_ROUTER;
 286                 else
 287                         DPRINTF("Invalid value: %d - (Use 0: never, 1: learn, 2: always)\n", blobmsg_get_u32(cur));
 288         }
 289
 290         device_set_disabled(dev, disabled);
 291 }
 292
 293 static void __init dev_init(void)
 294 {
 295         avl_init(&devices, avl_strcmp, true, NULL);
 296 }
 297
 298 static int device_broadcast_cb(void *ctx, struct safe_list *list)
 299 {
 300         struct device_user *dep = container_of(list, struct device_user, list);
 301         int *ev = ctx;
 302
 303         /* device might have been removed by an earlier callback */
 304         if (!dep->dev)
 305                 return 0;
 306
 307         if (dep->cb)
 308                 dep->cb(dep, *ev);
 309         return 0;
 310 }
 311
 312 void device_broadcast_event(struct device *dev, enum device_event ev)
 313 {
 314         int dev_ev = ev;
 315
 316         safe_list_for_each(&dev->aliases, device_broadcast_cb, &dev_ev);
 317         safe_list_for_each(&dev->users, device_broadcast_cb, &dev_ev);
 318 }
 319
 320 int device_claim(struct device_user *dep)
 321 {
 322         struct device *dev = dep->dev;
 323         int ret = 0;
 324
 325         if (dep->claimed)
 326                 return 0;
 327
 328         dep->claimed = true;
 329         D(DEVICE, "Claim %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active + 1);
 330         if (++dev->active != 1)
 331                 return 0;
 332
 333         device_broadcast_event(dev, DEV_EVENT_SETUP);
 334         if (dev->external) {
 335                 /* Get ifindex for external claimed devices so a valid   */
 336                 /* ifindex is in place avoiding possible race conditions */
 337                 device_set_ifindex(dev, system_if_resolve(dev));
 338                 if (!dev->ifindex)
 339                         ret = -1;
 340         } else
 341                 ret = dev->set_state(dev, true);
 342
 343         if (ret == 0)
 344                 device_broadcast_event(dev, DEV_EVENT_UP);
 345         else {
 346                 D(DEVICE, "claim %s %s failed: %d\n", dev->type->name, dev->ifname, ret);
 347                 dev->active = 0;
 348                 dep->claimed = false;
 349         }
 350
 351         return ret;
 352 }
 353
 354 void device_release(struct device_user *dep)
 355 {
 356         struct device *dev = dep->dev;
 357
 358         if (!dep->claimed)
 359                 return;
 360
 361         dep->claimed = false;
 362         dev->active--;
 363         D(DEVICE, "Release %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active);
 364         assert(dev->active >= 0);
 365
 366         if (dev->active)
 367                 return;
 368
 369         device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
 370         if (!dev->external)
 371                 dev->set_state(dev, false);
 372         device_broadcast_event(dev, DEV_EVENT_DOWN);
 373 }
 374
 375 int device_check_state(struct device *dev)
 376 {
 377         if (!dev->type->check_state)
 378                 return simple_device_type.check_state(dev);
 379
 380         return dev->type->check_state(dev);
 381 }
 382
 383 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
 384 {
 385         assert(dev);
 386         assert(type);
 387
 388         if (name)
 389                 strncpy(dev->ifname, name, IFNAMSIZ);
 390
 391         D(DEVICE, "Initialize device '%s'\n", dev->ifname);
 392         INIT_SAFE_LIST(&dev->users);
 393         INIT_SAFE_LIST(&dev->aliases);
 394         dev->type = type;
 395
 396         if (!dev->set_state)
 397                 dev->set_state = set_device_state;
 398 }
 399
 400 int device_init(struct device *dev, const struct device_type *type, const char *ifname)
 401 {
 402         int ret;
 403
 404         device_init_virtual(dev, type, ifname);
 405
 406         dev->avl.key = dev->ifname;
 407
 408         ret = avl_insert(&devices, &dev->avl);
 409         if (ret < 0)
 410                 return ret;
 411
 412         system_if_clear_state(dev);
 413         device_check_state(dev);
 414         dev->settings.rps = default_ps;
 415         dev->settings.xps = default_ps;
 416
 417         return 0;
 418 }
 419
 420 static struct device *
 421 device_create_default(const char *name, bool external)
 422 {
 423         struct device *dev;
 424
 425         if (!external && system_if_force_external(name))
 426                 return NULL;
 427
 428         D(DEVICE, "Create simple device '%s'\n", name);
 429         dev = calloc(1, sizeof(*dev));
 430         dev->external = external;
 431         dev->set_state = simple_device_set_state;
 432         device_init(dev, &simple_device_type, name);
 433         dev->default_config = true;
 434         if (external)
 435                 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
 436         return dev;
 437 }
 438
 439 struct device *
 440 device_get(const char *name, int create)
 441 {
 442         struct device *dev;
 443
 444         if (strchr(name, '.'))
 445                 return get_vlan_device_chain(name, create);
 446
 447         if (name[0] == '@')
 448                 return device_alias_get(name + 1);
 449
 450         dev = avl_find_element(&devices, name, dev, avl);
 451         if (dev) {
 452                 if (create > 1 && !dev->external) {
 453                         system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
 454                         dev->external = true;
 455                         device_set_present(dev, true);
 456                 }
 457                 return dev;
 458         }
 459
 460         if (!create)
 461                 return NULL;
 462
 463         return device_create_default(name, create > 1);
 464 }
 465
 466 static void
 467 device_delete(struct device *dev)
 468 {
 469         if (!dev->avl.key)
 470                 return;
 471
 472         D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
 473         avl_delete(&devices, &dev->avl);
 474         dev->avl.key = NULL;
 475 }
 476
 477 static int device_cleanup_cb(void *ctx, struct safe_list *list)
 478 {
 479         struct device_user *dep = container_of(list, struct device_user, list);
 480         if (dep->cb)
 481                 dep->cb(dep, DEV_EVENT_REMOVE);
 482
 483         device_release(dep);
 484         return 0;
 485 }
 486
 487 void device_cleanup(struct device *dev)
 488 {
 489         D(DEVICE, "Clean up device '%s'\n", dev->ifname);
 490         safe_list_for_each(&dev->users, device_cleanup_cb, NULL);
 491         safe_list_for_each(&dev->aliases, device_cleanup_cb, NULL);
 492         device_delete(dev);
 493 }
 494
 495 static void __device_set_present(struct device *dev, bool state)
 496 {
 497         if (dev->present == state)
 498                 return;
 499
 500         dev->present = state;
 501         device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
 502 }
 503
 504 void
 505 device_refresh_present(struct device *dev)
 506 {
 507         bool state = dev->sys_present;
 508
 509         if (dev->disabled || dev->deferred)
 510                 state = false;
 511
 512         __device_set_present(dev, state);
 513 }
 514
 515 void device_set_present(struct device *dev, bool state)
 516 {
 517         if (dev->sys_present == state)
 518                 return;
 519
 520         D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
 521         dev->sys_present = state;
 522         device_refresh_present(dev);
 523 }
 524
 525 void device_set_link(struct device *dev, bool state)
 526 {
 527         if (dev->link_active == state)
 528                 return;
 529
 530         netifd_log_message(L_NOTICE, "%s '%s' link is %s\n", dev->type->name, dev->ifname, state ? "up" : "down" );
 531
 532         dev->link_active = state;
 533         device_broadcast_event(dev, state ? DEV_EVENT_LINK_UP : DEV_EVENT_LINK_DOWN);
 534 }
 535
 536 void device_set_ifindex(struct device *dev, int ifindex)
 537 {
 538         if (dev->ifindex == ifindex)
 539                 return;
 540
 541         dev->ifindex = ifindex;
 542         device_broadcast_event(dev, DEV_EVENT_UPDATE_IFINDEX);
 543 }
 544
 545 static int device_refcount(struct device *dev)
 546 {
 547         struct list_head *list;
 548         int count = 0;
 549
 550         list_for_each(list, &dev->users.list)
 551                 count++;
 552
 553         list_for_each(list, &dev->aliases.list)
 554                 count++;
 555
 556         return count;
 557 }
 558
 559 static void
 560 __device_add_user(struct device_user *dep, struct device *dev)
 561 {
 562         struct safe_list *head;
 563
 564         dep->dev = dev;
 565
 566         if (dep->alias)
 567                 head = &dev->aliases;
 568         else
 569                 head = &dev->users;
 570
 571         safe_list_add(&dep->list, head);
 572         D(DEVICE, "Add user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
 573
 574         if (dep->cb && dev->present) {
 575                 dep->cb(dep, DEV_EVENT_ADD);
 576                 if (dev->active)
 577                         dep->cb(dep, DEV_EVENT_UP);
 578
 579                 if (dev->link_active)
 580                         dep->cb(dep, DEV_EVENT_LINK_UP);
 581         }
 582 }
 583
 584 void device_add_user(struct device_user *dep, struct device *dev)
 585 {
 586         if (dep->dev == dev)
 587                 return;
 588
 589         if (dep->dev)
 590                 device_remove_user(dep);
 591
 592         if (!dev)
 593                 return;
 594
 595         __device_add_user(dep, dev);
 596 }
 597
 598 void
 599 device_free(struct device *dev)
 600 {
 601         __devlock++;
 602         free(dev->config);
 603         device_cleanup(dev);
 604         dev->type->free(dev);
 605         __devlock--;
 606 }
 607
 608 static void
 609 __device_free_unused(struct device *dev)
 610 {
 611         if (!safe_list_empty(&dev->users) ||
 612                 !safe_list_empty(&dev->aliases) ||
 613             dev->current_config || __devlock)
 614                 return;
 615
 616         device_free(dev);
 617 }
 618
 619 void device_remove_user(struct device_user *dep)
 620 {
 621         struct device *dev = dep->dev;
 622
 623         if (!dep->dev)
 624                 return;
 625
 626         dep->hotplug = false;
 627         if (dep->claimed)
 628                 device_release(dep);
 629
 630         safe_list_del(&dep->list);
 631         dep->dev = NULL;
 632         D(DEVICE, "Remove user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
 633         __device_free_unused(dev);
 634 }
 635
 636 void
 637 device_free_unused(struct device *dev)
 638 {
 639         struct device *tmp;
 640
 641         if (dev)
 642                 return __device_free_unused(dev);
 643
 644         avl_for_each_element_safe(&devices, dev, avl, tmp)
 645                 __device_free_unused(dev);
 646 }
 647
 648 void
 649 device_init_pending(void)
 650 {
 651         struct device *dev, *tmp;
 652
 653         avl_for_each_element_safe(&devices, dev, avl, tmp) {
 654                 if (!dev->config_pending)
 655                         continue;
 656
 657                 dev->type->config_init(dev);
 658                 dev->config_pending = false;
 659         }
 660 }
 661
 662 static enum dev_change_type
 663 device_set_config(struct device *dev, const struct device_type *type,
 664                   struct blob_attr *attr)
 665 {
 666         struct blob_attr *tb[__DEV_ATTR_MAX];
 667         const struct uci_blob_param_list *cfg = type->config_params;
 668
 669         if (type != dev->type)
 670                 return DEV_CONFIG_RECREATE;
 671
 672         if (dev->type->reload)
 673                 return dev->type->reload(dev, attr);
 674
 675         if (uci_blob_check_equal(dev->config, attr, cfg))
 676                 return DEV_CONFIG_NO_CHANGE;
 677
 678         if (cfg == &device_attr_list) {
 679                 memset(tb, 0, sizeof(tb));
 680
 681                 if (attr)
 682                         blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
 683                                 blob_data(attr), blob_len(attr));
 684
 685                 device_init_settings(dev, tb);
 686                 return DEV_CONFIG_RESTART;
 687         } else
 688                 return DEV_CONFIG_RECREATE;
 689 }
 690
 691 enum dev_change_type
 692 device_apply_config(struct device *dev, const struct device_type *type,
 693                     struct blob_attr *config)
 694 {
 695         enum dev_change_type change;
 696
 697         change = device_set_config(dev, type, config);
 698         if (dev->external) {
 699                 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
 700                 change = DEV_CONFIG_APPLIED;
 701         }
 702
 703         switch (change) {
 704                 case DEV_CONFIG_RESTART:
 705                 case DEV_CONFIG_APPLIED:
 706                         D(DEVICE, "Device '%s': config applied\n", dev->ifname);
 707                         config = blob_memdup(config);
 708                         free(dev->config);
 709                         dev->config = config;
 710                         if (change == DEV_CONFIG_RESTART && dev->present) {
 711                                 device_set_present(dev, false);
 712                                 if (dev->active && !dev->external) {
 713                                         dev->set_state(dev, false);
 714                                         dev->set_state(dev, true);
 715                                 }
 716                                 device_set_present(dev, true);
 717                         }
 718                         break;
 719                 case DEV_CONFIG_NO_CHANGE:
 720                         D(DEVICE, "Device '%s': no configuration change\n", dev->ifname);
 721                         break;
 722                 case DEV_CONFIG_RECREATE:
 723                         break;
 724         }
 725
 726         return change;
 727 }
 728
 729 static void
 730 device_replace(struct device *dev, struct device *odev)
 731 {
 732         struct device_user *dep, *tmp;
 733
 734         __devlock++;
 735         if (odev->present)
 736                 device_set_present(odev, false);
 737
 738         list_for_each_entry_safe(dep, tmp, &odev->users.list, list.list) {
 739                 device_release(dep);
 740                 safe_list_del(&dep->list);
 741                 __device_add_user(dep, dev);
 742         }
 743         __devlock--;
 744
 745         device_free(odev);
 746 }
 747
 748 void
 749 device_reset_config(void)
 750 {
 751         struct device *dev;
 752
 753         avl_for_each_element(&devices, dev, avl)
 754                 dev->current_config = false;
 755 }
 756
 757 void
 758 device_reset_old(void)
 759 {
 760         struct device *dev, *tmp, *ndev;
 761
 762         avl_for_each_element_safe(&devices, dev, avl, tmp) {
 763                 if (dev->current_config || dev->default_config)
 764                         continue;
 765
 766                 if (dev->type != &simple_device_type)
 767                         continue;
 768
 769                 ndev = device_create_default(dev->ifname, dev->external);
 770                 if (!ndev)
 771                         continue;
 772
 773                 device_replace(ndev, dev);
 774         }
 775 }
 776
 777 void
 778 device_set_default_ps(bool state)
 779 {
 780         struct device *dev;
 781
 782         if (state == default_ps)
 783                 return;
 784
 785         default_ps = state;
 786
 787         avl_for_each_element(&devices, dev, avl) {
 788                 struct device_settings *s = &dev->settings;
 789                 unsigned int apply_mask = 0;
 790
 791                 if (!(s->flags & DEV_OPT_RPS)) {
 792                         s->rps = default_ps;
 793                         apply_mask |= DEV_OPT_RPS;
 794                 }
 795
 796                 if (!(s->flags & DEV_OPT_XPS)) {
 797                         s->xps = default_ps;
 798                         apply_mask |= DEV_OPT_XPS;
 799                 }
 800
 801                 if (!apply_mask)
 802                         continue;
 803
 804                 if (!(dev->external || (dev->present && dev->active)) ||
 805                                 dev->config_pending)
 806                         continue;
 807
 808                 system_if_apply_settings(dev, s, apply_mask);
 809         }
 810 }
 811
 812 struct device *
 813 device_create(const char *name, const struct device_type *type,
 814               struct blob_attr *config)
 815 {
 816         struct device *odev = NULL, *dev;
 817         enum dev_change_type change;
 818
 819         odev = device_get(name, false);
 820         if (odev) {
 821                 odev->current_config = true;
 822                 change = device_apply_config(odev, type, config);
 823                 switch (change) {
 824                 case DEV_CONFIG_RECREATE:
 825                         D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
 826                         device_delete(odev);
 827                         break;
 828                 default:
 829                         return odev;
 830                 }
 831         } else
 832                 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
 833
 834         config = blob_memdup(config);
 835         if (!config)
 836                 return NULL;
 837
 838         dev = type->create(name, config);
 839         if (!dev)
 840                 return NULL;
 841
 842         dev->current_config = true;
 843         dev->config = config;
 844         if (odev)
 845                 device_replace(dev, odev);
 846
 847         if (!config_init && dev->config_pending) {
 848                 type->config_init(dev);
 849                 dev->config_pending = false;
 850         }
 851
 852         return dev;
 853 }
 854
 855 void
 856 device_dump_status(struct blob_buf *b, struct device *dev)
 857 {
 858         struct device_settings st;
 859         void *c, *s;
 860
 861         if (!dev) {
 862                 avl_for_each_element(&devices, dev, avl) {
 863                         if (!dev->present)
 864                                 continue;
 865                         c = blobmsg_open_table(b, dev->ifname);
 866                         device_dump_status(b, dev);
 867                         blobmsg_close_table(b, c);
 868                 }
 869
 870                 return;
 871         }
 872
 873         blobmsg_add_u8(b, "external", dev->external);
 874         blobmsg_add_u8(b, "present", dev->present);
 875         blobmsg_add_string(b, "type", dev->type->name);
 876
 877         if (!dev->present)
 878                 return;
 879
 880         blobmsg_add_u8(b, "up", !!dev->active);
 881         blobmsg_add_u8(b, "carrier", !!dev->link_active);
 882
 883         if (dev->type->dump_info)
 884                 dev->type->dump_info(dev, b);
 885         else
 886                 system_if_dump_info(dev, b);
 887
 888         if (dev->active) {
 889                 device_merge_settings(dev, &st);
 890                 if (st.flags & DEV_OPT_MTU)
 891                         blobmsg_add_u32(b, "mtu", st.mtu);
 892                 if (st.flags & DEV_OPT_MTU6)
 893                         blobmsg_add_u32(b, "mtu6", st.mtu6);
 894                 if (st.flags & DEV_OPT_MACADDR)
 895                         blobmsg_add_string(b, "macaddr", format_macaddr(st.macaddr));
 896                 if (st.flags & DEV_OPT_TXQUEUELEN)
 897                         blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
 898                 if (st.flags & DEV_OPT_IPV6)
 899                         blobmsg_add_u8(b, "ipv6", st.ipv6);
 900                 if (st.flags & DEV_OPT_PROMISC)
 901                         blobmsg_add_u8(b, "promisc", st.promisc);
 902                 if (st.flags & DEV_OPT_RPFILTER)
 903                         blobmsg_add_u32(b, "rpfilter", st.rpfilter);
 904                 if (st.flags & DEV_OPT_ACCEPTLOCAL)
 905                         blobmsg_add_u8(b, "acceptlocal", st.acceptlocal);
 906                 if (st.flags & DEV_OPT_IGMPVERSION)
 907                         blobmsg_add_u32(b, "igmpversion", st.igmpversion);
 908                 if (st.flags & DEV_OPT_MLDVERSION)
 909                         blobmsg_add_u32(b, "mldversion", st.mldversion);
 910                 if (st.flags & DEV_OPT_NEIGHREACHABLETIME) {
 911                         blobmsg_add_u32(b, "neigh4reachabletime", st.neigh4reachabletime);
 912                         blobmsg_add_u32(b, "neigh6reachabletime", st.neigh6reachabletime);
 913                 }
 914                 if (st.flags & DEV_OPT_DADTRANSMITS)
 915                         blobmsg_add_u32(b, "dadtransmits", st.dadtransmits);
 916                 if (st.flags & DEV_OPT_MULTICAST_TO_UNICAST)
 917                         blobmsg_add_u8(b, "multicast_to_unicast", st.multicast_to_unicast);
 918                 if (st.flags & DEV_OPT_MULTICAST_ROUTER)
 919                         blobmsg_add_u32(b, "multicast_router", st.multicast_router);
 920         }
 921
 922         s = blobmsg_open_table(b, "statistics");
 923         if (dev->type->dump_stats)
 924                 dev->type->dump_stats(dev, b);
 925         else
 926                 system_if_dump_stats(dev, b);
 927         blobmsg_close_table(b, s);
 928 }