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 };
  51
  52 const struct uci_blob_param_list device_attr_list = {
  53         .n_params = __DEV_ATTR_MAX,
  54         .params = dev_attrs,
  55 };
  56
  57 static int __devlock = 0;
  58
  59 void device_lock(void)
  60 {
  61         __devlock++;
  62 }
  63
  64 void device_unlock(void)
  65 {
  66         __devlock--;
  67         if (!__devlock)
  68                 device_free_unused(NULL);
  69 }
  70
  71 static int set_device_state(struct device *dev, bool state)
  72 {
  73         if (state) {
  74                 /* Set ifindex for all devices being enabled so a valid  */
  75                 /* ifindex is in place avoiding possible race conditions */
  76                 device_set_ifindex(dev, system_if_resolve(dev));
  77                 if (!dev->ifindex)
  78                         return -1;
  79         }
  80
  81         if (dev->external)
  82                 return 0;
  83
  84         if (state)
  85                 system_if_up(dev);
  86         else
  87                 system_if_down(dev);
  88
  89         return 0;
  90 }
  91
  92 static int
  93 simple_device_set_state(struct device *dev, bool state)
  94 {
  95         struct device *pdev;
  96         int ret = 0;
  97
  98         pdev = dev->parent.dev;
  99         if (state && !pdev) {
 100                 pdev = system_if_get_parent(dev);
 101                 if (pdev)
 102                         device_add_user(&dev->parent, pdev);
 103         }
 104
 105         if (pdev) {
 106                 if (state)
 107                         ret = device_claim(&dev->parent);
 108                 else
 109                         device_release(&dev->parent);
 110
 111                 if (ret < 0)
 112                         return ret;
 113         }
 114         return set_device_state(dev, state);
 115 }
 116
 117 static struct device *
 118 simple_device_create(const char *name, struct blob_attr *attr)
 119 {
 120         struct blob_attr *tb[__DEV_ATTR_MAX];
 121         struct device *dev = NULL;
 122
 123         blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb, blob_data(attr), blob_len(attr));
 124         dev = device_get(name, true);
 125         if (!dev)
 126                 return NULL;
 127
 128         dev->set_state = simple_device_set_state;
 129         device_init_settings(dev, tb);
 130
 131         return dev;
 132 }
 133
 134 static void simple_device_free(struct device *dev)
 135 {
 136         if (dev->parent.dev)
 137                 device_remove_user(&dev->parent);
 138         free(dev);
 139 }
 140
 141 const struct device_type simple_device_type = {
 142         .name = "Network device",
 143         .config_params = &device_attr_list,
 144
 145         .create = simple_device_create,
 146         .check_state = system_if_check,
 147         .free = simple_device_free,
 148 };
 149
 150 static void
 151 device_merge_settings(struct device *dev, struct device_settings *n)
 152 {
 153         struct device_settings *os = &dev->orig_settings;
 154         struct device_settings *s = &dev->settings;
 155
 156         memset(n, 0, sizeof(*n));
 157         n->mtu = s->flags & DEV_OPT_MTU ? s->mtu : os->mtu;
 158         n->mtu6 = s->flags & DEV_OPT_MTU6 ? s->mtu6 : os->mtu6;
 159         n->txqueuelen = s->flags & DEV_OPT_TXQUEUELEN ?
 160                 s->txqueuelen : os->txqueuelen;
 161         memcpy(n->macaddr,
 162                 (s->flags & DEV_OPT_MACADDR ? s->macaddr : os->macaddr),
 163                 sizeof(n->macaddr));
 164         n->ipv6 = s->flags & DEV_OPT_IPV6 ? s->ipv6 : os->ipv6;
 165         n->promisc = s->flags & DEV_OPT_PROMISC ? s->promisc : os->promisc;
 166         n->rpfilter = s->flags & DEV_OPT_RPFILTER ? s->rpfilter : os->rpfilter;
 167         n->acceptlocal = s->flags & DEV_OPT_ACCEPTLOCAL ? s->acceptlocal : os->acceptlocal;
 168         n->igmpversion = s->flags & DEV_OPT_IGMPVERSION ? s->igmpversion : os->igmpversion;
 169         n->mldversion = s->flags & DEV_OPT_MLDVERSION ? s->mldversion : os->mldversion;
 170         n->neigh4reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
 171                 s->neigh4reachabletime : os->neigh4reachabletime;
 172         n->neigh6reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
 173                         s->neigh6reachabletime : os->neigh6reachabletime;
 174         n->flags = s->flags | os->flags;
 175 }
 176
 177 void
 178 device_init_settings(struct device *dev, struct blob_attr **tb)
 179 {
 180         struct device_settings *s = &dev->settings;
 181         struct blob_attr *cur;
 182         struct ether_addr *ea;
 183         bool disabled = false;
 184
 185         s->flags = 0;
 186         if ((cur = tb[DEV_ATTR_ENABLED]))
 187                 disabled = !blobmsg_get_bool(cur);
 188
 189         if ((cur = tb[DEV_ATTR_MTU])) {
 190                 s->mtu = blobmsg_get_u32(cur);
 191                 s->flags |= DEV_OPT_MTU;
 192         }
 193
 194         if ((cur = tb[DEV_ATTR_MTU6])) {
 195                 s->mtu6 = blobmsg_get_u32(cur);
 196                 s->flags |= DEV_OPT_MTU6;
 197         }
 198
 199         if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
 200                 s->txqueuelen = blobmsg_get_u32(cur);
 201                 s->flags |= DEV_OPT_TXQUEUELEN;
 202         }
 203
 204         if ((cur = tb[DEV_ATTR_MACADDR])) {
 205                 ea = ether_aton(blobmsg_data(cur));
 206                 if (ea) {
 207                         memcpy(s->macaddr, ea, 6);
 208                         s->flags |= DEV_OPT_MACADDR;
 209                 }
 210         }
 211
 212         if ((cur = tb[DEV_ATTR_IPV6])) {
 213                 s->ipv6 = blobmsg_get_bool(cur);
 214                 s->flags |= DEV_OPT_IPV6;
 215         }
 216
 217         if ((cur = tb[DEV_ATTR_PROMISC])) {
 218                 s->promisc = blobmsg_get_bool(cur);
 219                 s->flags |= DEV_OPT_PROMISC;
 220         }
 221
 222         if ((cur = tb[DEV_ATTR_RPFILTER])) {
 223                 if (system_resolve_rpfilter(blobmsg_data(cur), &s->rpfilter))
 224                         s->flags |= DEV_OPT_RPFILTER;
 225                 else
 226                         DPRINTF("Failed to resolve rpfilter: %s\n", (char *) blobmsg_data(cur));
 227         }
 228
 229         if ((cur = tb[DEV_ATTR_ACCEPTLOCAL])) {
 230                 s->acceptlocal = blobmsg_get_bool(cur);
 231                 s->flags |= DEV_OPT_ACCEPTLOCAL;
 232         }
 233
 234         if ((cur = tb[DEV_ATTR_IGMPVERSION])) {
 235                 s->igmpversion = blobmsg_get_u32(cur);
 236                 if (s->igmpversion >= 1 && s->igmpversion <= 3)
 237                         s->flags |= DEV_OPT_IGMPVERSION;
 238                 else
 239                         DPRINTF("Failed to resolve igmpversion: %d\n", blobmsg_get_u32(cur));
 240         }
 241
 242         if ((cur = tb[DEV_ATTR_MLDVERSION])) {
 243                 s->mldversion = blobmsg_get_u32(cur);
 244                 if (s->mldversion >= 1 && s->mldversion <= 2)
 245                         s->flags |= DEV_OPT_MLDVERSION;
 246                 else
 247                         DPRINTF("Failed to resolve mldversion: %d\n", blobmsg_get_u32(cur));
 248         }
 249
 250         if ((cur = tb[DEV_ATTR_NEIGHREACHABLETIME])) {
 251                 s->neigh6reachabletime = s->neigh4reachabletime = blobmsg_get_u32(cur);
 252                 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
 253         }
 254
 255         if ((cur = tb[DEV_ATTR_RPS])) {
 256                 s->rps = blobmsg_get_bool(cur);
 257                 s->flags |= DEV_OPT_RPS;
 258         }
 259         else
 260                 s->rps = default_ps;
 261
 262         if ((cur = tb[DEV_ATTR_XPS])) {
 263                 s->xps = blobmsg_get_bool(cur);
 264                 s->flags |= DEV_OPT_XPS;
 265         }
 266         else
 267                 s->xps = default_ps;
 268
 269         device_set_disabled(dev, disabled);
 270 }
 271
 272 static void __init dev_init(void)
 273 {
 274         avl_init(&devices, avl_strcmp, true, NULL);
 275 }
 276
 277 static int device_broadcast_cb(void *ctx, struct safe_list *list)
 278 {
 279         struct device_user *dep = container_of(list, struct device_user, list);
 280         int *ev = ctx;
 281
 282         /* device might have been removed by an earlier callback */
 283         if (!dep->dev)
 284                 return 0;
 285
 286         if (dep->cb)
 287                 dep->cb(dep, *ev);
 288         return 0;
 289 }
 290
 291 void device_broadcast_event(struct device *dev, enum device_event ev)
 292 {
 293         int dev_ev = ev;
 294
 295         safe_list_for_each(&dev->aliases, device_broadcast_cb, &dev_ev);
 296         safe_list_for_each(&dev->users, device_broadcast_cb, &dev_ev);
 297 }
 298
 299 int device_claim(struct device_user *dep)
 300 {
 301         struct device *dev = dep->dev;
 302         int ret;
 303
 304         if (dep->claimed)
 305                 return 0;
 306
 307         dep->claimed = true;
 308         D(DEVICE, "Claim %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active + 1);
 309         if (++dev->active != 1)
 310                 return 0;
 311
 312         device_broadcast_event(dev, DEV_EVENT_SETUP);
 313         ret = dev->set_state(dev, true);
 314         if (ret == 0)
 315                 device_broadcast_event(dev, DEV_EVENT_UP);
 316         else {
 317                 D(DEVICE, "claim %s %s failed: %d\n", dev->type->name, dev->ifname, ret);
 318                 dev->active = 0;
 319                 dep->claimed = false;
 320         }
 321
 322         return ret;
 323 }
 324
 325 void device_release(struct device_user *dep)
 326 {
 327         struct device *dev = dep->dev;
 328
 329         if (!dep->claimed)
 330                 return;
 331
 332         dep->claimed = false;
 333         dev->active--;
 334         D(DEVICE, "Release %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active);
 335         assert(dev->active >= 0);
 336
 337         if (dev->active)
 338                 return;
 339
 340         device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
 341         if (!dev->external)
 342                 dev->set_state(dev, false);
 343         device_broadcast_event(dev, DEV_EVENT_DOWN);
 344 }
 345
 346 int device_check_state(struct device *dev)
 347 {
 348         if (!dev->type->check_state)
 349                 return simple_device_type.check_state(dev);
 350
 351         return dev->type->check_state(dev);
 352 }
 353
 354 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
 355 {
 356         assert(dev);
 357         assert(type);
 358
 359         if (name)
 360                 strncpy(dev->ifname, name, IFNAMSIZ);
 361
 362         D(DEVICE, "Initialize device '%s'\n", dev->ifname);
 363         INIT_SAFE_LIST(&dev->users);
 364         INIT_SAFE_LIST(&dev->aliases);
 365         dev->type = type;
 366
 367         if (!dev->set_state)
 368                 dev->set_state = set_device_state;
 369 }
 370
 371 int device_init(struct device *dev, const struct device_type *type, const char *ifname)
 372 {
 373         int ret;
 374
 375         device_init_virtual(dev, type, ifname);
 376
 377         dev->avl.key = dev->ifname;
 378
 379         ret = avl_insert(&devices, &dev->avl);
 380         if (ret < 0)
 381                 return ret;
 382
 383         system_if_clear_state(dev);
 384         device_check_state(dev);
 385         dev->settings.rps = default_ps;
 386         dev->settings.xps = default_ps;
 387
 388         return 0;
 389 }
 390
 391 static struct device *
 392 device_create_default(const char *name, bool external)
 393 {
 394         struct device *dev;
 395
 396         if (!external && system_if_force_external(name))
 397                 return NULL;
 398
 399         D(DEVICE, "Create simple device '%s'\n", name);
 400         dev = calloc(1, sizeof(*dev));
 401         dev->external = external;
 402         dev->set_state = simple_device_set_state;
 403         device_init(dev, &simple_device_type, name);
 404         dev->default_config = true;
 405         return dev;
 406 }
 407
 408 struct device *
 409 device_get(const char *name, int create)
 410 {
 411         struct device *dev;
 412
 413         if (strchr(name, '.'))
 414                 return get_vlan_device_chain(name, create);
 415
 416         if (name[0] == '@')
 417                 return device_alias_get(name + 1);
 418
 419         dev = avl_find_element(&devices, name, dev, avl);
 420         if (dev) {
 421                 if (create > 1 && !dev->external) {
 422                         dev->external = true;
 423                         device_set_present(dev, true);
 424                 }
 425                 return dev;
 426         }
 427
 428         if (!create)
 429                 return NULL;
 430
 431         return device_create_default(name, create > 1);
 432 }
 433
 434 static void
 435 device_delete(struct device *dev)
 436 {
 437         if (!dev->avl.key)
 438                 return;
 439
 440         D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
 441         avl_delete(&devices, &dev->avl);
 442         dev->avl.key = NULL;
 443 }
 444
 445 static int device_cleanup_cb(void *ctx, struct safe_list *list)
 446 {
 447         struct device_user *dep = container_of(list, struct device_user, list);
 448         if (dep->cb)
 449                 dep->cb(dep, DEV_EVENT_REMOVE);
 450
 451         device_release(dep);
 452         return 0;
 453 }
 454
 455 void device_cleanup(struct device *dev)
 456 {
 457         D(DEVICE, "Clean up device '%s'\n", dev->ifname);
 458         safe_list_for_each(&dev->users, device_cleanup_cb, NULL);
 459         safe_list_for_each(&dev->aliases, device_cleanup_cb, NULL);
 460         device_delete(dev);
 461 }
 462
 463 static void __device_set_present(struct device *dev, bool state)
 464 {
 465         if (dev->present == state)
 466                 return;
 467
 468         dev->present = state;
 469         device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
 470 }
 471
 472 void
 473 device_refresh_present(struct device *dev)
 474 {
 475         bool state = dev->sys_present;
 476
 477         if (dev->disabled || dev->deferred)
 478                 state = false;
 479
 480         __device_set_present(dev, state);
 481 }
 482
 483 void device_set_present(struct device *dev, bool state)
 484 {
 485         if (dev->sys_present == state)
 486                 return;
 487
 488         D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
 489         dev->sys_present = state;
 490         device_refresh_present(dev);
 491 }
 492
 493 void device_set_link(struct device *dev, bool state)
 494 {
 495         if (dev->link_active == state)
 496                 return;
 497
 498         netifd_log_message(L_NOTICE, "%s '%s' link is %s\n", dev->type->name, dev->ifname, state ? "up" : "down" );
 499
 500         dev->link_active = state;
 501         device_broadcast_event(dev, state ? DEV_EVENT_LINK_UP : DEV_EVENT_LINK_DOWN);
 502 }
 503
 504 void device_set_ifindex(struct device *dev, int ifindex)
 505 {
 506         if (dev->ifindex == ifindex)
 507                 return;
 508
 509         dev->ifindex = ifindex;
 510         device_broadcast_event(dev, DEV_EVENT_UPDATE_IFINDEX);
 511 }
 512
 513 static int device_refcount(struct device *dev)
 514 {
 515         struct list_head *list;
 516         int count = 0;
 517
 518         list_for_each(list, &dev->users.list)
 519                 count++;
 520
 521         list_for_each(list, &dev->aliases.list)
 522                 count++;
 523
 524         return count;
 525 }
 526
 527 void device_add_user(struct device_user *dep, struct device *dev)
 528 {
 529         struct safe_list *head;
 530
 531         if (dep->dev == dev)
 532                 return;
 533
 534         if (dep->dev)
 535                 device_remove_user(dep);
 536
 537         if (!dev)
 538                 return;
 539
 540         dep->dev = dev;
 541
 542         if (dep->alias)
 543                 head = &dev->aliases;
 544         else
 545                 head = &dev->users;
 546
 547         safe_list_add(&dep->list, head);
 548         D(DEVICE, "Add user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
 549
 550         if (dep->cb && dev->present) {
 551                 dep->cb(dep, DEV_EVENT_ADD);
 552                 if (dev->active)
 553                         dep->cb(dep, DEV_EVENT_UP);
 554
 555                 if (dev->link_active)
 556                         dep->cb(dep, DEV_EVENT_LINK_UP);
 557         }
 558 }
 559
 560 void
 561 device_free(struct device *dev)
 562 {
 563         __devlock++;
 564         free(dev->config);
 565         device_cleanup(dev);
 566         dev->type->free(dev);
 567         __devlock--;
 568 }
 569
 570 static void
 571 __device_free_unused(struct device *dev)
 572 {
 573         if (!safe_list_empty(&dev->users) ||
 574                 !safe_list_empty(&dev->aliases) ||
 575             dev->current_config || __devlock)
 576                 return;
 577
 578         device_free(dev);
 579 }
 580
 581 void device_remove_user(struct device_user *dep)
 582 {
 583         struct device *dev = dep->dev;
 584
 585         if (!dep->dev)
 586                 return;
 587
 588         dep->hotplug = false;
 589         if (dep->claimed)
 590                 device_release(dep);
 591
 592         safe_list_del(&dep->list);
 593         dep->dev = NULL;
 594         D(DEVICE, "Remove user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
 595         __device_free_unused(dev);
 596 }
 597
 598 void
 599 device_free_unused(struct device *dev)
 600 {
 601         struct device *tmp;
 602
 603         if (dev)
 604                 return __device_free_unused(dev);
 605
 606         avl_for_each_element_safe(&devices, dev, avl, tmp)
 607                 __device_free_unused(dev);
 608 }
 609
 610 void
 611 device_init_pending(void)
 612 {
 613         struct device *dev, *tmp;
 614
 615         avl_for_each_element_safe(&devices, dev, avl, tmp) {
 616                 if (!dev->config_pending)
 617                         continue;
 618
 619                 dev->type->config_init(dev);
 620                 dev->config_pending = false;
 621         }
 622 }
 623
 624 static enum dev_change_type
 625 device_set_config(struct device *dev, const struct device_type *type,
 626                   struct blob_attr *attr)
 627 {
 628         struct blob_attr *tb[__DEV_ATTR_MAX];
 629         const struct uci_blob_param_list *cfg = type->config_params;
 630
 631         if (type != dev->type)
 632                 return DEV_CONFIG_RECREATE;
 633
 634         if (dev->type->reload)
 635                 return dev->type->reload(dev, attr);
 636
 637         if (uci_blob_check_equal(dev->config, attr, cfg))
 638                 return DEV_CONFIG_NO_CHANGE;
 639
 640         if (cfg == &device_attr_list) {
 641                 memset(tb, 0, sizeof(tb));
 642
 643                 if (attr)
 644                         blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
 645                                 blob_data(attr), blob_len(attr));
 646
 647                 device_init_settings(dev, tb);
 648                 return DEV_CONFIG_RESTART;
 649         } else
 650                 return DEV_CONFIG_RECREATE;
 651 }
 652
 653 enum dev_change_type
 654 device_apply_config(struct device *dev, const struct device_type *type,
 655                     struct blob_attr *config)
 656 {
 657         enum dev_change_type change;
 658
 659         change = device_set_config(dev, type, config);
 660         if (dev->external) {
 661                 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
 662                 change = DEV_CONFIG_APPLIED;
 663         }
 664
 665         switch (change) {
 666                 case DEV_CONFIG_RESTART:
 667                 case DEV_CONFIG_APPLIED:
 668                         D(DEVICE, "Device '%s': config applied\n", dev->ifname);
 669                         config = blob_memdup(config);
 670                         free(dev->config);
 671                         dev->config = config;
 672                         if (change == DEV_CONFIG_RESTART && dev->present) {
 673                                 device_set_present(dev, false);
 674                                 if (dev->active && !dev->external) {
 675                                         dev->set_state(dev, false);
 676                                         dev->set_state(dev, true);
 677                                 }
 678                                 device_set_present(dev, true);
 679                         }
 680                         break;
 681                 case DEV_CONFIG_NO_CHANGE:
 682                         D(DEVICE, "Device '%s': no configuration change\n", dev->ifname);
 683                         break;
 684                 case DEV_CONFIG_RECREATE:
 685                         break;
 686         }
 687
 688         return change;
 689 }
 690
 691 static void
 692 device_replace(struct device *dev, struct device *odev)
 693 {
 694         struct device_user *dep, *tmp;
 695         bool present = odev->present;
 696
 697         if (present)
 698                 device_set_present(odev, false);
 699
 700         list_for_each_entry_safe(dep, tmp, &odev->users.list, list.list) {
 701                 device_release(dep);
 702                 safe_list_del(&dep->list);
 703                 safe_list_add(&dep->list, &dev->users);
 704                 dep->dev = dev;
 705         }
 706         device_free(odev);
 707
 708         if (present)
 709                 device_set_present(dev, true);
 710 }
 711
 712 void
 713 device_reset_config(void)
 714 {
 715         struct device *dev;
 716
 717         avl_for_each_element(&devices, dev, avl)
 718                 dev->current_config = false;
 719 }
 720
 721 void
 722 device_reset_old(void)
 723 {
 724         struct device *dev, *tmp, *ndev;
 725
 726         avl_for_each_element_safe(&devices, dev, avl, tmp) {
 727                 if (dev->current_config || dev->default_config)
 728                         continue;
 729
 730                 if (dev->type != &simple_device_type)
 731                         continue;
 732
 733                 ndev = device_create_default(dev->ifname, dev->external);
 734                 device_replace(ndev, dev);
 735         }
 736 }
 737
 738 void
 739 device_set_default_ps(bool state)
 740 {
 741         struct device *dev;
 742
 743         if (state == default_ps)
 744                 return;
 745
 746         default_ps = state;
 747
 748         avl_for_each_element(&devices, dev, avl) {
 749                 struct device_settings *s = &dev->settings;
 750                 unsigned int apply_mask = 0;
 751
 752                 if (!(s->flags & DEV_OPT_RPS)) {
 753                         s->rps = default_ps;
 754                         apply_mask |= DEV_OPT_RPS;
 755                 }
 756
 757                 if (!(s->flags & DEV_OPT_XPS)) {
 758                         s->xps = default_ps;
 759                         apply_mask |= DEV_OPT_XPS;
 760                 }
 761
 762                 if (!apply_mask)
 763                         continue;
 764
 765                 if (!(dev->external || (dev->present && dev->active)) ||
 766                                 dev->config_pending)
 767                         continue;
 768
 769                 system_if_apply_settings(dev, s, apply_mask);
 770         }
 771 }
 772
 773 struct device *
 774 device_create(const char *name, const struct device_type *type,
 775               struct blob_attr *config)
 776 {
 777         struct device *odev = NULL, *dev;
 778         enum dev_change_type change;
 779
 780         odev = device_get(name, false);
 781         if (odev) {
 782                 odev->current_config = true;
 783                 change = device_apply_config(odev, type, config);
 784                 switch (change) {
 785                 case DEV_CONFIG_RECREATE:
 786                         D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
 787                         device_delete(odev);
 788                         break;
 789                 default:
 790                         return odev;
 791                 }
 792         } else
 793                 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
 794
 795         config = blob_memdup(config);
 796         if (!config)
 797                 return NULL;
 798
 799         dev = type->create(name, config);
 800         if (!dev)
 801                 return NULL;
 802
 803         dev->current_config = true;
 804         dev->config = config;
 805         if (odev)
 806                 device_replace(dev, odev);
 807
 808         if (!config_init && dev->config_pending) {
 809                 type->config_init(dev);
 810                 dev->config_pending = false;
 811         }
 812
 813         return dev;
 814 }
 815
 816 void
 817 device_dump_status(struct blob_buf *b, struct device *dev)
 818 {
 819         struct device_settings st;
 820         void *c, *s;
 821
 822         if (!dev) {
 823                 avl_for_each_element(&devices, dev, avl) {
 824                         if (!dev->present)
 825                                 continue;
 826                         c = blobmsg_open_table(b, dev->ifname);
 827                         device_dump_status(b, dev);
 828                         blobmsg_close_table(b, c);
 829                 }
 830
 831                 return;
 832         }
 833
 834         blobmsg_add_u8(b, "external", dev->external);
 835         blobmsg_add_u8(b, "present", dev->present);
 836         blobmsg_add_string(b, "type", dev->type->name);
 837
 838         if (!dev->present)
 839                 return;
 840
 841         blobmsg_add_u8(b, "up", !!dev->active);
 842         blobmsg_add_u8(b, "carrier", !!dev->link_active);
 843
 844         if (dev->type->dump_info)
 845                 dev->type->dump_info(dev, b);
 846         else
 847                 system_if_dump_info(dev, b);
 848
 849         if (dev->active) {
 850                 device_merge_settings(dev, &st);
 851                 if (st.flags & DEV_OPT_MTU)
 852                         blobmsg_add_u32(b, "mtu", st.mtu);
 853                 if (st.flags & DEV_OPT_MTU6)
 854                         blobmsg_add_u32(b, "mtu6", st.mtu6);
 855                 if (st.flags & DEV_OPT_MACADDR)
 856                         blobmsg_add_string(b, "macaddr", format_macaddr(st.macaddr));
 857                 if (st.flags & DEV_OPT_TXQUEUELEN)
 858                         blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
 859                 if (st.flags & DEV_OPT_IPV6)
 860                         blobmsg_add_u8(b, "ipv6", st.ipv6);
 861                 if (st.flags & DEV_OPT_PROMISC)
 862                         blobmsg_add_u8(b, "promisc", st.promisc);
 863                 if (st.flags & DEV_OPT_RPFILTER)
 864                         blobmsg_add_u32(b, "rpfilter", st.rpfilter);
 865                 if (st.flags & DEV_OPT_ACCEPTLOCAL)
 866                         blobmsg_add_u8(b, "acceptlocal", st.acceptlocal);
 867                 if (st.flags & DEV_OPT_IGMPVERSION)
 868                         blobmsg_add_u32(b, "igmpversion", st.igmpversion);
 869                 if (st.flags & DEV_OPT_MLDVERSION)
 870                         blobmsg_add_u32(b, "mldversion", st.mldversion);
 871                 if (st.flags & DEV_OPT_NEIGHREACHABLETIME) {
 872                         blobmsg_add_u32(b, "neigh4reachabletime", st.neigh4reachabletime);
 873                         blobmsg_add_u32(b, "neigh6reachabletime", st.neigh6reachabletime);
 874                 }
 875         }
 876
 877         s = blobmsg_open_table(b, "statistics");
 878         if (dev->type->dump_stats)
 879                 dev->type->dump_stats(dev, b);
 880         else
 881                 system_if_dump_stats(dev, b);
 882         blobmsg_close_table(b, s);
 883 }