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 | os->valid_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
 341                 system_if_get_settings(dev, &dev->orig_settings);
 342         } else
 343                 ret = dev->set_state(dev, true);
 344
 345         if (ret == 0)
 346                 device_broadcast_event(dev, DEV_EVENT_UP);
 347         else {
 348                 D(DEVICE, "claim %s %s failed: %d\n", dev->type->name, dev->ifname, ret);
 349                 dev->active = 0;
 350                 dep->claimed = false;
 351         }
 352
 353         return ret;
 354 }
 355
 356 void device_release(struct device_user *dep)
 357 {
 358         struct device *dev = dep->dev;
 359
 360         if (!dep->claimed)
 361                 return;
 362
 363         dep->claimed = false;
 364         dev->active--;
 365         D(DEVICE, "Release %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active);
 366         assert(dev->active >= 0);
 367
 368         if (dev->active)
 369                 return;
 370
 371         device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
 372         if (!dev->external)
 373                 dev->set_state(dev, false);
 374         device_broadcast_event(dev, DEV_EVENT_DOWN);
 375 }
 376
 377 int device_check_state(struct device *dev)
 378 {
 379         if (!dev->type->check_state)
 380                 return simple_device_type.check_state(dev);
 381
 382         return dev->type->check_state(dev);
 383 }
 384
 385 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
 386 {
 387         assert(dev);
 388         assert(type);
 389
 390         if (name)
 391                 strncpy(dev->ifname, name, IFNAMSIZ);
 392
 393         D(DEVICE, "Initialize device '%s'\n", dev->ifname);
 394         INIT_SAFE_LIST(&dev->users);
 395         INIT_SAFE_LIST(&dev->aliases);
 396         dev->type = type;
 397
 398         if (!dev->set_state)
 399                 dev->set_state = set_device_state;
 400 }
 401
 402 int device_init(struct device *dev, const struct device_type *type, const char *ifname)
 403 {
 404         int ret;
 405
 406         device_init_virtual(dev, type, ifname);
 407
 408         dev->avl.key = dev->ifname;
 409
 410         ret = avl_insert(&devices, &dev->avl);
 411         if (ret < 0)
 412                 return ret;
 413
 414         system_if_clear_state(dev);
 415         device_check_state(dev);
 416         dev->settings.rps = default_ps;
 417         dev->settings.xps = default_ps;
 418
 419         return 0;
 420 }
 421
 422 static struct device *
 423 device_create_default(const char *name, bool external)
 424 {
 425         struct device *dev;
 426
 427         if (!external && system_if_force_external(name))
 428                 return NULL;
 429
 430         D(DEVICE, "Create simple device '%s'\n", name);
 431         dev = calloc(1, sizeof(*dev));
 432         if (!dev)
 433                 return NULL;
 434
 435         dev->external = external;
 436         dev->set_state = simple_device_set_state;
 437         device_init(dev, &simple_device_type, name);
 438         dev->default_config = true;
 439         if (external)
 440                 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
 441         return dev;
 442 }
 443
 444 struct device *
 445 device_get(const char *name, int create)
 446 {
 447         struct device *dev;
 448
 449         if (strchr(name, '.'))
 450                 return get_vlan_device_chain(name, create);
 451
 452         if (name[0] == '@')
 453                 return device_alias_get(name + 1);
 454
 455         dev = avl_find_element(&devices, name, dev, avl);
 456         if (dev) {
 457                 if (create > 1 && !dev->external) {
 458                         system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
 459                         dev->external = true;
 460                         device_set_present(dev, true);
 461                 }
 462                 return dev;
 463         }
 464
 465         if (!create)
 466                 return NULL;
 467
 468         return device_create_default(name, create > 1);
 469 }
 470
 471 static void
 472 device_delete(struct device *dev)
 473 {
 474         if (!dev->avl.key)
 475                 return;
 476
 477         D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
 478         avl_delete(&devices, &dev->avl);
 479         dev->avl.key = NULL;
 480 }
 481
 482 static int device_cleanup_cb(void *ctx, struct safe_list *list)
 483 {
 484         struct device_user *dep = container_of(list, struct device_user, list);
 485         if (dep->cb)
 486                 dep->cb(dep, DEV_EVENT_REMOVE);
 487
 488         device_release(dep);
 489         return 0;
 490 }
 491
 492 void device_cleanup(struct device *dev)
 493 {
 494         D(DEVICE, "Clean up device '%s'\n", dev->ifname);
 495         safe_list_for_each(&dev->users, device_cleanup_cb, NULL);
 496         safe_list_for_each(&dev->aliases, device_cleanup_cb, NULL);
 497         device_delete(dev);
 498 }
 499
 500 static void __device_set_present(struct device *dev, bool state)
 501 {
 502         if (dev->present == state)
 503                 return;
 504
 505         dev->present = state;
 506         device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
 507 }
 508
 509 void
 510 device_refresh_present(struct device *dev)
 511 {
 512         bool state = dev->sys_present;
 513
 514         if (dev->disabled || dev->deferred)
 515                 state = false;
 516
 517         __device_set_present(dev, state);
 518 }
 519
 520 void device_set_present(struct device *dev, bool state)
 521 {
 522         if (dev->sys_present == state)
 523                 return;
 524
 525         D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
 526         dev->sys_present = state;
 527         device_refresh_present(dev);
 528 }
 529
 530 void device_set_link(struct device *dev, bool state)
 531 {
 532         if (dev->link_active == state)
 533                 return;
 534
 535         netifd_log_message(L_NOTICE, "%s '%s' link is %s\n", dev->type->name, dev->ifname, state ? "up" : "down" );
 536
 537         dev->link_active = state;
 538         device_broadcast_event(dev, state ? DEV_EVENT_LINK_UP : DEV_EVENT_LINK_DOWN);
 539 }
 540
 541 void device_set_ifindex(struct device *dev, int ifindex)
 542 {
 543         if (dev->ifindex == ifindex)
 544                 return;
 545
 546         dev->ifindex = ifindex;
 547         device_broadcast_event(dev, DEV_EVENT_UPDATE_IFINDEX);
 548 }
 549
 550 static int device_refcount(struct device *dev)
 551 {
 552         struct list_head *list;
 553         int count = 0;
 554
 555         list_for_each(list, &dev->users.list)
 556                 count++;
 557
 558         list_for_each(list, &dev->aliases.list)
 559                 count++;
 560
 561         return count;
 562 }
 563
 564 static void
 565 __device_add_user(struct device_user *dep, struct device *dev)
 566 {
 567         struct safe_list *head;
 568
 569         dep->dev = dev;
 570
 571         if (dep->alias)
 572                 head = &dev->aliases;
 573         else
 574                 head = &dev->users;
 575
 576         safe_list_add(&dep->list, head);
 577         D(DEVICE, "Add user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
 578
 579         if (dep->cb && dev->present) {
 580                 dep->cb(dep, DEV_EVENT_ADD);
 581                 if (dev->active)
 582                         dep->cb(dep, DEV_EVENT_UP);
 583
 584                 if (dev->link_active)
 585                         dep->cb(dep, DEV_EVENT_LINK_UP);
 586         }
 587 }
 588
 589 void device_add_user(struct device_user *dep, struct device *dev)
 590 {
 591         if (dep->dev == dev)
 592                 return;
 593
 594         if (dep->dev)
 595                 device_remove_user(dep);
 596
 597         if (!dev)
 598                 return;
 599
 600         __device_add_user(dep, dev);
 601 }
 602
 603 void
 604 device_free(struct device *dev)
 605 {
 606         __devlock++;
 607         free(dev->config);
 608         device_cleanup(dev);
 609         dev->type->free(dev);
 610         __devlock--;
 611 }
 612
 613 static void
 614 __device_free_unused(struct device *dev)
 615 {
 616         if (!safe_list_empty(&dev->users) ||
 617                 !safe_list_empty(&dev->aliases) ||
 618             dev->current_config || __devlock)
 619                 return;
 620
 621         device_free(dev);
 622 }
 623
 624 void device_remove_user(struct device_user *dep)
 625 {
 626         struct device *dev = dep->dev;
 627
 628         if (!dep->dev)
 629                 return;
 630
 631         dep->hotplug = false;
 632         if (dep->claimed)
 633                 device_release(dep);
 634
 635         safe_list_del(&dep->list);
 636         dep->dev = NULL;
 637         D(DEVICE, "Remove user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
 638         __device_free_unused(dev);
 639 }
 640
 641 void
 642 device_free_unused(struct device *dev)
 643 {
 644         struct device *tmp;
 645
 646         if (dev)
 647                 return __device_free_unused(dev);
 648
 649         avl_for_each_element_safe(&devices, dev, avl, tmp)
 650                 __device_free_unused(dev);
 651 }
 652
 653 void
 654 device_init_pending(void)
 655 {
 656         struct device *dev, *tmp;
 657
 658         avl_for_each_element_safe(&devices, dev, avl, tmp) {
 659                 if (!dev->config_pending)
 660                         continue;
 661
 662                 dev->type->config_init(dev);
 663                 dev->config_pending = false;
 664         }
 665 }
 666
 667 static enum dev_change_type
 668 device_set_config(struct device *dev, const struct device_type *type,
 669                   struct blob_attr *attr)
 670 {
 671         struct blob_attr *tb[__DEV_ATTR_MAX];
 672         const struct uci_blob_param_list *cfg = type->config_params;
 673
 674         if (type != dev->type)
 675                 return DEV_CONFIG_RECREATE;
 676
 677         if (dev->type->reload)
 678                 return dev->type->reload(dev, attr);
 679
 680         if (uci_blob_check_equal(dev->config, attr, cfg))
 681                 return DEV_CONFIG_NO_CHANGE;
 682
 683         if (cfg == &device_attr_list) {
 684                 memset(tb, 0, sizeof(tb));
 685
 686                 if (attr)
 687                         blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
 688                                 blob_data(attr), blob_len(attr));
 689
 690                 device_init_settings(dev, tb);
 691                 return DEV_CONFIG_RESTART;
 692         } else
 693                 return DEV_CONFIG_RECREATE;
 694 }
 695
 696 enum dev_change_type
 697 device_apply_config(struct device *dev, const struct device_type *type,
 698                     struct blob_attr *config)
 699 {
 700         enum dev_change_type change;
 701
 702         change = device_set_config(dev, type, config);
 703         if (dev->external) {
 704                 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
 705                 change = DEV_CONFIG_APPLIED;
 706         }
 707
 708         switch (change) {
 709                 case DEV_CONFIG_RESTART:
 710                 case DEV_CONFIG_APPLIED:
 711                         D(DEVICE, "Device '%s': config applied\n", dev->ifname);
 712                         config = blob_memdup(config);
 713                         free(dev->config);
 714                         dev->config = config;
 715                         if (change == DEV_CONFIG_RESTART && dev->present) {
 716                                 device_set_present(dev, false);
 717                                 if (dev->active && !dev->external) {
 718                                         dev->set_state(dev, false);
 719                                         dev->set_state(dev, true);
 720                                 }
 721                                 device_set_present(dev, true);
 722                         }
 723                         break;
 724                 case DEV_CONFIG_NO_CHANGE:
 725                         D(DEVICE, "Device '%s': no configuration change\n", dev->ifname);
 726                         break;
 727                 case DEV_CONFIG_RECREATE:
 728                         break;
 729         }
 730
 731         return change;
 732 }
 733
 734 static void
 735 device_replace(struct device *dev, struct device *odev)
 736 {
 737         struct device_user *dep, *tmp;
 738
 739         __devlock++;
 740         if (odev->present)
 741                 device_set_present(odev, false);
 742
 743         list_for_each_entry_safe(dep, tmp, &odev->users.list, list.list) {
 744                 device_release(dep);
 745                 safe_list_del(&dep->list);
 746                 __device_add_user(dep, dev);
 747         }
 748         __devlock--;
 749
 750         device_free(odev);
 751 }
 752
 753 void
 754 device_reset_config(void)
 755 {
 756         struct device *dev;
 757
 758         avl_for_each_element(&devices, dev, avl)
 759                 dev->current_config = false;
 760 }
 761
 762 void
 763 device_reset_old(void)
 764 {
 765         struct device *dev, *tmp, *ndev;
 766
 767         avl_for_each_element_safe(&devices, dev, avl, tmp) {
 768                 if (dev->current_config || dev->default_config)
 769                         continue;
 770
 771                 if (dev->type != &simple_device_type)
 772                         continue;
 773
 774                 ndev = device_create_default(dev->ifname, dev->external);
 775                 if (!ndev)
 776                         continue;
 777
 778                 device_replace(ndev, dev);
 779         }
 780 }
 781
 782 void
 783 device_set_default_ps(bool state)
 784 {
 785         struct device *dev;
 786
 787         if (state == default_ps)
 788                 return;
 789
 790         default_ps = state;
 791
 792         avl_for_each_element(&devices, dev, avl) {
 793                 struct device_settings *s = &dev->settings;
 794                 unsigned int apply_mask = 0;
 795
 796                 if (!(s->flags & DEV_OPT_RPS)) {
 797                         s->rps = default_ps;
 798                         apply_mask |= DEV_OPT_RPS;
 799                 }
 800
 801                 if (!(s->flags & DEV_OPT_XPS)) {
 802                         s->xps = default_ps;
 803                         apply_mask |= DEV_OPT_XPS;
 804                 }
 805
 806                 if (!apply_mask)
 807                         continue;
 808
 809                 if (!(dev->external || (dev->present && dev->active)) ||
 810                                 dev->config_pending)
 811                         continue;
 812
 813                 system_if_apply_settings(dev, s, apply_mask);
 814         }
 815 }
 816
 817 struct device *
 818 device_create(const char *name, const struct device_type *type,
 819               struct blob_attr *config)
 820 {
 821         struct device *odev = NULL, *dev;
 822         enum dev_change_type change;
 823
 824         odev = device_get(name, false);
 825         if (odev) {
 826                 odev->current_config = true;
 827                 change = device_apply_config(odev, type, config);
 828                 switch (change) {
 829                 case DEV_CONFIG_RECREATE:
 830                         D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
 831                         device_delete(odev);
 832                         break;
 833                 default:
 834                         return odev;
 835                 }
 836         } else
 837                 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
 838
 839         config = blob_memdup(config);
 840         if (!config)
 841                 return NULL;
 842
 843         dev = type->create(name, config);
 844         if (!dev)
 845                 return NULL;
 846
 847         dev->current_config = true;
 848         dev->config = config;
 849         if (odev)
 850                 device_replace(dev, odev);
 851
 852         if (!config_init && dev->config_pending) {
 853                 type->config_init(dev);
 854                 dev->config_pending = false;
 855         }
 856
 857         return dev;
 858 }
 859
 860 void
 861 device_dump_status(struct blob_buf *b, struct device *dev)
 862 {
 863         struct device_settings st;
 864         void *c, *s;
 865
 866         if (!dev) {
 867                 avl_for_each_element(&devices, dev, avl) {
 868                         if (!dev->present)
 869                                 continue;
 870                         c = blobmsg_open_table(b, dev->ifname);
 871                         device_dump_status(b, dev);
 872                         blobmsg_close_table(b, c);
 873                 }
 874
 875                 return;
 876         }
 877
 878         blobmsg_add_u8(b, "external", dev->external);
 879         blobmsg_add_u8(b, "present", dev->present);
 880         blobmsg_add_string(b, "type", dev->type->name);
 881
 882         if (!dev->present)
 883                 return;
 884
 885         blobmsg_add_u8(b, "up", !!dev->active);
 886         blobmsg_add_u8(b, "carrier", !!dev->link_active);
 887
 888         if (dev->type->dump_info)
 889                 dev->type->dump_info(dev, b);
 890         else
 891                 system_if_dump_info(dev, b);
 892
 893         if (dev->active) {
 894                 device_merge_settings(dev, &st);
 895                 if (st.flags & DEV_OPT_MTU)
 896                         blobmsg_add_u32(b, "mtu", st.mtu);
 897                 if (st.flags & DEV_OPT_MTU6)
 898                         blobmsg_add_u32(b, "mtu6", st.mtu6);
 899                 if (st.flags & DEV_OPT_MACADDR)
 900                         blobmsg_add_string(b, "macaddr", format_macaddr(st.macaddr));
 901                 if (st.flags & DEV_OPT_TXQUEUELEN)
 902                         blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
 903                 if (st.flags & DEV_OPT_IPV6)
 904                         blobmsg_add_u8(b, "ipv6", st.ipv6);
 905                 if (st.flags & DEV_OPT_PROMISC)
 906                         blobmsg_add_u8(b, "promisc", st.promisc);
 907                 if (st.flags & DEV_OPT_RPFILTER)
 908                         blobmsg_add_u32(b, "rpfilter", st.rpfilter);
 909                 if (st.flags & DEV_OPT_ACCEPTLOCAL)
 910                         blobmsg_add_u8(b, "acceptlocal", st.acceptlocal);
 911                 if (st.flags & DEV_OPT_IGMPVERSION)
 912                         blobmsg_add_u32(b, "igmpversion", st.igmpversion);
 913                 if (st.flags & DEV_OPT_MLDVERSION)
 914                         blobmsg_add_u32(b, "mldversion", st.mldversion);
 915                 if (st.flags & DEV_OPT_NEIGHREACHABLETIME) {
 916                         blobmsg_add_u32(b, "neigh4reachabletime", st.neigh4reachabletime);
 917                         blobmsg_add_u32(b, "neigh6reachabletime", st.neigh6reachabletime);
 918                 }
 919                 if (st.flags & DEV_OPT_DADTRANSMITS)
 920                         blobmsg_add_u32(b, "dadtransmits", st.dadtransmits);
 921                 if (st.flags & DEV_OPT_MULTICAST_TO_UNICAST)
 922                         blobmsg_add_u8(b, "multicast_to_unicast", st.multicast_to_unicast);
 923                 if (st.flags & DEV_OPT_MULTICAST_ROUTER)
 924                         blobmsg_add_u32(b, "multicast_router", st.multicast_router);
 925         }
 926
 927         s = blobmsg_open_table(b, "statistics");
 928         if (dev->type->dump_stats)
 929                 dev->type->dump_stats(dev, b);
 930         else
 931                 system_if_dump_stats(dev, b);
 932         blobmsg_close_table(b, s);
 933 }