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         [DEV_ATTR_MULTICAST] = { .name ="multicast", .type = BLOBMSG_TYPE_BOOL },
  54 };
  55
  56 const struct uci_blob_param_list device_attr_list = {
  57         .n_params = __DEV_ATTR_MAX,
  58         .params = dev_attrs,
  59 };
  60
  61 static int __devlock = 0;
  62
  63 void device_lock(void)
  64 {
  65         __devlock++;
  66 }
  67
  68 void device_unlock(void)
  69 {
  70         __devlock--;
  71         if (!__devlock)
  72                 device_free_unused(NULL);
  73 }
  74
  75 static int set_device_state(struct device *dev, bool state)
  76 {
  77         if (state) {
  78                 /* Get ifindex for all devices being enabled so a valid  */
  79                 /* ifindex is in place avoiding possible race conditions */
  80                 device_set_ifindex(dev, system_if_resolve(dev));
  81                 if (!dev->ifindex)
  82                         return -1;
  83
  84                 system_if_up(dev);
  85         }
  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->dadtransmits = s->flags & DEV_OPT_DADTRANSMITS ?
 175                 s->dadtransmits : os->dadtransmits;
 176         n->multicast = s->flags & DEV_OPT_MULTICAST ?
 177                 s->multicast : os->multicast;
 178         n->multicast_to_unicast = s->multicast_to_unicast;
 179         n->multicast_router = s->multicast_router;
 180         n->flags = s->flags | os->flags | os->valid_flags;
 181 }
 182
 183 void
 184 device_init_settings(struct device *dev, struct blob_attr **tb)
 185 {
 186         struct device_settings *s = &dev->settings;
 187         struct blob_attr *cur;
 188         struct ether_addr *ea;
 189         bool disabled = false;
 190
 191         s->flags = 0;
 192         if ((cur = tb[DEV_ATTR_ENABLED]))
 193                 disabled = !blobmsg_get_bool(cur);
 194
 195         if ((cur = tb[DEV_ATTR_MTU])) {
 196                 s->mtu = blobmsg_get_u32(cur);
 197                 s->flags |= DEV_OPT_MTU;
 198         }
 199
 200         if ((cur = tb[DEV_ATTR_MTU6])) {
 201                 s->mtu6 = blobmsg_get_u32(cur);
 202                 s->flags |= DEV_OPT_MTU6;
 203         }
 204
 205         if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
 206                 s->txqueuelen = blobmsg_get_u32(cur);
 207                 s->flags |= DEV_OPT_TXQUEUELEN;
 208         }
 209
 210         if ((cur = tb[DEV_ATTR_MACADDR])) {
 211                 ea = ether_aton(blobmsg_data(cur));
 212                 if (ea) {
 213                         memcpy(s->macaddr, ea, 6);
 214                         s->flags |= DEV_OPT_MACADDR;
 215                 }
 216         }
 217
 218         if ((cur = tb[DEV_ATTR_IPV6])) {
 219                 s->ipv6 = blobmsg_get_bool(cur);
 220                 s->flags |= DEV_OPT_IPV6;
 221         }
 222
 223         if ((cur = tb[DEV_ATTR_PROMISC])) {
 224                 s->promisc = blobmsg_get_bool(cur);
 225                 s->flags |= DEV_OPT_PROMISC;
 226         }
 227
 228         if ((cur = tb[DEV_ATTR_RPFILTER])) {
 229                 if (system_resolve_rpfilter(blobmsg_data(cur), &s->rpfilter))
 230                         s->flags |= DEV_OPT_RPFILTER;
 231                 else
 232                         DPRINTF("Failed to resolve rpfilter: %s\n", (char *) blobmsg_data(cur));
 233         }
 234
 235         if ((cur = tb[DEV_ATTR_ACCEPTLOCAL])) {
 236                 s->acceptlocal = blobmsg_get_bool(cur);
 237                 s->flags |= DEV_OPT_ACCEPTLOCAL;
 238         }
 239
 240         if ((cur = tb[DEV_ATTR_IGMPVERSION])) {
 241                 s->igmpversion = blobmsg_get_u32(cur);
 242                 if (s->igmpversion >= 1 && s->igmpversion <= 3)
 243                         s->flags |= DEV_OPT_IGMPVERSION;
 244                 else
 245                         DPRINTF("Failed to resolve igmpversion: %d\n", blobmsg_get_u32(cur));
 246         }
 247
 248         if ((cur = tb[DEV_ATTR_MLDVERSION])) {
 249                 s->mldversion = blobmsg_get_u32(cur);
 250                 if (s->mldversion >= 1 && s->mldversion <= 2)
 251                         s->flags |= DEV_OPT_MLDVERSION;
 252                 else
 253                         DPRINTF("Failed to resolve mldversion: %d\n", blobmsg_get_u32(cur));
 254         }
 255
 256         if ((cur = tb[DEV_ATTR_NEIGHREACHABLETIME])) {
 257                 s->neigh6reachabletime = s->neigh4reachabletime = blobmsg_get_u32(cur);
 258                 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
 259         }
 260
 261         if ((cur = tb[DEV_ATTR_RPS])) {
 262                 s->rps = blobmsg_get_bool(cur);
 263                 s->flags |= DEV_OPT_RPS;
 264         }
 265         else
 266                 s->rps = default_ps;
 267
 268         if ((cur = tb[DEV_ATTR_XPS])) {
 269                 s->xps = blobmsg_get_bool(cur);
 270                 s->flags |= DEV_OPT_XPS;
 271         }
 272         else
 273                 s->xps = default_ps;
 274
 275         if ((cur = tb[DEV_ATTR_DADTRANSMITS])) {
 276                 s->dadtransmits = blobmsg_get_u32(cur);
 277                 s->flags |= DEV_OPT_DADTRANSMITS;
 278         }
 279
 280         if ((cur = tb[DEV_ATTR_MULTICAST_TO_UNICAST])) {
 281                 s->multicast_to_unicast = blobmsg_get_bool(cur);
 282                 s->flags |= DEV_OPT_MULTICAST_TO_UNICAST;
 283         }
 284
 285         if ((cur = tb[DEV_ATTR_MULTICAST_ROUTER])) {
 286                 s->multicast_router = blobmsg_get_u32(cur);
 287                 if (s->multicast_router <= 2)
 288                         s->flags |= DEV_OPT_MULTICAST_ROUTER;
 289                 else
 290                         DPRINTF("Invalid value: %d - (Use 0: never, 1: learn, 2: always)\n", blobmsg_get_u32(cur));
 291         }
 292
 293         if ((cur = tb[DEV_ATTR_MULTICAST])) {
 294                 s->multicast = blobmsg_get_bool(cur);
 295                 s->flags |= DEV_OPT_MULTICAST;
 296         }
 297
 298         device_set_disabled(dev, disabled);
 299 }
 300
 301 static void __init dev_init(void)
 302 {
 303         avl_init(&devices, avl_strcmp, true, NULL);
 304 }
 305
 306 static int device_broadcast_cb(void *ctx, struct safe_list *list)
 307 {
 308         struct device_user *dep = container_of(list, struct device_user, list);
 309         int *ev = ctx;
 310
 311         /* device might have been removed by an earlier callback */
 312         if (!dep->dev)
 313                 return 0;
 314
 315         if (dep->cb)
 316                 dep->cb(dep, *ev);
 317         return 0;
 318 }
 319
 320 void device_broadcast_event(struct device *dev, enum device_event ev)
 321 {
 322         int dev_ev = ev;
 323
 324         safe_list_for_each(&dev->aliases, device_broadcast_cb, &dev_ev);
 325         safe_list_for_each(&dev->users, device_broadcast_cb, &dev_ev);
 326 }
 327
 328 int device_claim(struct device_user *dep)
 329 {
 330         struct device *dev = dep->dev;
 331         int ret = 0;
 332
 333         if (dep->claimed)
 334                 return 0;
 335
 336         if (!dev)
 337                 return -1;
 338
 339         dep->claimed = true;
 340         D(DEVICE, "Claim %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active + 1);
 341         if (++dev->active != 1)
 342                 return 0;
 343
 344         device_broadcast_event(dev, DEV_EVENT_SETUP);
 345         if (dev->external) {
 346                 /* Get ifindex for external claimed devices so a valid   */
 347                 /* ifindex is in place avoiding possible race conditions */
 348                 device_set_ifindex(dev, system_if_resolve(dev));
 349                 if (!dev->ifindex)
 350                         ret = -1;
 351
 352                 system_if_get_settings(dev, &dev->orig_settings);
 353         } else
 354                 ret = dev->set_state(dev, true);
 355
 356         if (ret == 0)
 357                 device_broadcast_event(dev, DEV_EVENT_UP);
 358         else {
 359                 D(DEVICE, "claim %s %s failed: %d\n", dev->type->name, dev->ifname, ret);
 360                 dev->active = 0;
 361                 dep->claimed = false;
 362         }
 363
 364         return ret;
 365 }
 366
 367 void device_release(struct device_user *dep)
 368 {
 369         struct device *dev = dep->dev;
 370
 371         if (!dep->claimed)
 372                 return;
 373
 374         dep->claimed = false;
 375         dev->active--;
 376         D(DEVICE, "Release %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active);
 377         assert(dev->active >= 0);
 378
 379         if (dev->active)
 380                 return;
 381
 382         device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
 383         if (!dev->external)
 384                 dev->set_state(dev, false);
 385         device_broadcast_event(dev, DEV_EVENT_DOWN);
 386 }
 387
 388 int device_check_state(struct device *dev)
 389 {
 390         if (!dev->type->check_state)
 391                 return simple_device_type.check_state(dev);
 392
 393         return dev->type->check_state(dev);
 394 }
 395
 396 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
 397 {
 398         assert(dev);
 399         assert(type);
 400
 401         if (name)
 402                 strncpy(dev->ifname, name, IFNAMSIZ);
 403
 404         D(DEVICE, "Initialize device '%s'\n", dev->ifname);
 405         INIT_SAFE_LIST(&dev->users);
 406         INIT_SAFE_LIST(&dev->aliases);
 407         dev->type = type;
 408
 409         if (!dev->set_state)
 410                 dev->set_state = set_device_state;
 411 }
 412
 413 int device_init(struct device *dev, const struct device_type *type, const char *ifname)
 414 {
 415         int ret;
 416
 417         device_init_virtual(dev, type, ifname);
 418
 419         dev->avl.key = dev->ifname;
 420
 421         ret = avl_insert(&devices, &dev->avl);
 422         if (ret < 0)
 423                 return ret;
 424
 425         system_if_clear_state(dev);
 426         device_check_state(dev);
 427         dev->settings.rps = default_ps;
 428         dev->settings.xps = default_ps;
 429
 430         return 0;
 431 }
 432
 433 static struct device *
 434 device_create_default(const char *name, bool external)
 435 {
 436         struct device *dev;
 437
 438         if (!external && system_if_force_external(name))
 439                 return NULL;
 440
 441         D(DEVICE, "Create simple device '%s'\n", name);
 442         dev = calloc(1, sizeof(*dev));
 443         if (!dev)
 444                 return NULL;
 445
 446         dev->external = external;
 447         dev->set_state = simple_device_set_state;
 448         device_init(dev, &simple_device_type, name);
 449         dev->default_config = true;
 450         if (external)
 451                 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
 452         return dev;
 453 }
 454
 455 struct device *
 456 device_get(const char *name, int create)
 457 {
 458         struct device *dev;
 459
 460         if (strchr(name, '.'))
 461                 return get_vlan_device_chain(name, create);
 462
 463         if (name[0] == '@')
 464                 return device_alias_get(name + 1);
 465
 466         dev = avl_find_element(&devices, name, dev, avl);
 467         if (dev) {
 468                 if (create > 1 && !dev->external) {
 469                         system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
 470                         dev->external = true;
 471                         device_set_present(dev, true);
 472                 }
 473                 return dev;
 474         }
 475
 476         if (!create)
 477                 return NULL;
 478
 479         return device_create_default(name, create > 1);
 480 }
 481
 482 static void
 483 device_delete(struct device *dev)
 484 {
 485         if (!dev->avl.key)
 486                 return;
 487
 488         D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
 489         avl_delete(&devices, &dev->avl);
 490         dev->avl.key = NULL;
 491 }
 492
 493 static int device_cleanup_cb(void *ctx, struct safe_list *list)
 494 {
 495         struct device_user *dep = container_of(list, struct device_user, list);
 496         if (dep->cb)
 497                 dep->cb(dep, DEV_EVENT_REMOVE);
 498
 499         device_release(dep);
 500         return 0;
 501 }
 502
 503 void device_cleanup(struct device *dev)
 504 {
 505         D(DEVICE, "Clean up device '%s'\n", dev->ifname);
 506         safe_list_for_each(&dev->users, device_cleanup_cb, NULL);
 507         safe_list_for_each(&dev->aliases, device_cleanup_cb, NULL);
 508         device_delete(dev);
 509 }
 510
 511 static void __device_set_present(struct device *dev, bool state)
 512 {
 513         if (dev->present == state)
 514                 return;
 515
 516         dev->present = state;
 517         device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
 518 }
 519
 520 void
 521 device_refresh_present(struct device *dev)
 522 {
 523         bool state = dev->sys_present;
 524
 525         if (dev->disabled || dev->deferred)
 526                 state = false;
 527
 528         __device_set_present(dev, state);
 529 }
 530
 531 void device_set_present(struct device *dev, bool state)
 532 {
 533         if (dev->sys_present == state)
 534                 return;
 535
 536         D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
 537         dev->sys_present = state;
 538         device_refresh_present(dev);
 539 }
 540
 541 void device_set_link(struct device *dev, bool state)
 542 {
 543         if (dev->link_active == state)
 544                 return;
 545
 546         netifd_log_message(L_NOTICE, "%s '%s' link is %s\n", dev->type->name, dev->ifname, state ? "up" : "down" );
 547
 548         dev->link_active = state;
 549         device_broadcast_event(dev, state ? DEV_EVENT_LINK_UP : DEV_EVENT_LINK_DOWN);
 550 }
 551
 552 void device_set_ifindex(struct device *dev, int ifindex)
 553 {
 554         if (dev->ifindex == ifindex)
 555                 return;
 556
 557         dev->ifindex = ifindex;
 558         device_broadcast_event(dev, DEV_EVENT_UPDATE_IFINDEX);
 559 }
 560
 561 static int device_refcount(struct device *dev)
 562 {
 563         struct list_head *list;
 564         int count = 0;
 565
 566         list_for_each(list, &dev->users.list)
 567                 count++;
 568
 569         list_for_each(list, &dev->aliases.list)
 570                 count++;
 571
 572         return count;
 573 }
 574
 575 static void
 576 __device_add_user(struct device_user *dep, struct device *dev)
 577 {
 578         struct safe_list *head;
 579
 580         dep->dev = dev;
 581
 582         if (dep->alias)
 583                 head = &dev->aliases;
 584         else
 585                 head = &dev->users;
 586
 587         safe_list_add(&dep->list, head);
 588         D(DEVICE, "Add user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
 589
 590         if (dep->cb && dev->present) {
 591                 dep->cb(dep, DEV_EVENT_ADD);
 592                 if (dev->active)
 593                         dep->cb(dep, DEV_EVENT_UP);
 594
 595                 if (dev->link_active)
 596                         dep->cb(dep, DEV_EVENT_LINK_UP);
 597         }
 598 }
 599
 600 void device_add_user(struct device_user *dep, struct device *dev)
 601 {
 602         if (dep->dev == dev)
 603                 return;
 604
 605         if (dep->dev)
 606                 device_remove_user(dep);
 607
 608         if (!dev)
 609                 return;
 610
 611         __device_add_user(dep, dev);
 612 }
 613
 614 void
 615 device_free(struct device *dev)
 616 {
 617         __devlock++;
 618         free(dev->config);
 619         device_cleanup(dev);
 620         dev->type->free(dev);
 621         __devlock--;
 622 }
 623
 624 static void
 625 __device_free_unused(struct device *dev)
 626 {
 627         if (!safe_list_empty(&dev->users) ||
 628                 !safe_list_empty(&dev->aliases) ||
 629             dev->current_config || __devlock)
 630                 return;
 631
 632         device_free(dev);
 633 }
 634
 635 void device_remove_user(struct device_user *dep)
 636 {
 637         struct device *dev = dep->dev;
 638
 639         if (!dep->dev)
 640                 return;
 641
 642         dep->hotplug = false;
 643         if (dep->claimed)
 644                 device_release(dep);
 645
 646         safe_list_del(&dep->list);
 647         dep->dev = NULL;
 648         D(DEVICE, "Remove user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
 649         __device_free_unused(dev);
 650 }
 651
 652 void
 653 device_free_unused(struct device *dev)
 654 {
 655         struct device *tmp;
 656
 657         if (dev)
 658                 return __device_free_unused(dev);
 659
 660         avl_for_each_element_safe(&devices, dev, avl, tmp)
 661                 __device_free_unused(dev);
 662 }
 663
 664 void
 665 device_init_pending(void)
 666 {
 667         struct device *dev, *tmp;
 668
 669         avl_for_each_element_safe(&devices, dev, avl, tmp) {
 670                 if (!dev->config_pending)
 671                         continue;
 672
 673                 dev->type->config_init(dev);
 674                 dev->config_pending = false;
 675         }
 676 }
 677
 678 static enum dev_change_type
 679 device_set_config(struct device *dev, const struct device_type *type,
 680                   struct blob_attr *attr)
 681 {
 682         struct blob_attr *tb[__DEV_ATTR_MAX];
 683         const struct uci_blob_param_list *cfg = type->config_params;
 684
 685         if (type != dev->type)
 686                 return DEV_CONFIG_RECREATE;
 687
 688         if (dev->type->reload)
 689                 return dev->type->reload(dev, attr);
 690
 691         if (uci_blob_check_equal(dev->config, attr, cfg))
 692                 return DEV_CONFIG_NO_CHANGE;
 693
 694         if (cfg == &device_attr_list) {
 695                 memset(tb, 0, sizeof(tb));
 696
 697                 if (attr)
 698                         blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
 699                                 blob_data(attr), blob_len(attr));
 700
 701                 device_init_settings(dev, tb);
 702                 return DEV_CONFIG_RESTART;
 703         } else
 704                 return DEV_CONFIG_RECREATE;
 705 }
 706
 707 enum dev_change_type
 708 device_apply_config(struct device *dev, const struct device_type *type,
 709                     struct blob_attr *config)
 710 {
 711         enum dev_change_type change;
 712
 713         change = device_set_config(dev, type, config);
 714         if (dev->external) {
 715                 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
 716                 change = DEV_CONFIG_APPLIED;
 717         }
 718
 719         switch (change) {
 720                 case DEV_CONFIG_RESTART:
 721                 case DEV_CONFIG_APPLIED:
 722                         D(DEVICE, "Device '%s': config applied\n", dev->ifname);
 723                         config = blob_memdup(config);
 724                         free(dev->config);
 725                         dev->config = config;
 726                         if (change == DEV_CONFIG_RESTART && dev->present) {
 727                                 int ret = 0;
 728
 729                                 device_set_present(dev, false);
 730                                 if (dev->active && !dev->external) {
 731                                         ret = dev->set_state(dev, false);
 732                                         if (!ret)
 733                                                 ret = dev->set_state(dev, true);
 734                                 }
 735                                 if (!ret)
 736                                         device_set_present(dev, true);
 737                         }
 738                         break;
 739                 case DEV_CONFIG_NO_CHANGE:
 740                         D(DEVICE, "Device '%s': no configuration change\n", dev->ifname);
 741                         break;
 742                 case DEV_CONFIG_RECREATE:
 743                         break;
 744         }
 745
 746         return change;
 747 }
 748
 749 static void
 750 device_replace(struct device *dev, struct device *odev)
 751 {
 752         struct device_user *dep, *tmp;
 753
 754         __devlock++;
 755         if (odev->present)
 756                 device_set_present(odev, false);
 757
 758         list_for_each_entry_safe(dep, tmp, &odev->users.list, list.list) {
 759                 device_release(dep);
 760                 safe_list_del(&dep->list);
 761                 __device_add_user(dep, dev);
 762         }
 763         __devlock--;
 764
 765         device_free(odev);
 766 }
 767
 768 void
 769 device_reset_config(void)
 770 {
 771         struct device *dev;
 772
 773         avl_for_each_element(&devices, dev, avl)
 774                 dev->current_config = false;
 775 }
 776
 777 void
 778 device_reset_old(void)
 779 {
 780         struct device *dev, *tmp, *ndev;
 781
 782         avl_for_each_element_safe(&devices, dev, avl, tmp) {
 783                 if (dev->current_config || dev->default_config)
 784                         continue;
 785
 786                 if (dev->type != &simple_device_type)
 787                         continue;
 788
 789                 ndev = device_create_default(dev->ifname, dev->external);
 790                 if (!ndev)
 791                         continue;
 792
 793                 device_replace(ndev, dev);
 794         }
 795 }
 796
 797 void
 798 device_set_default_ps(bool state)
 799 {
 800         struct device *dev;
 801
 802         if (state == default_ps)
 803                 return;
 804
 805         default_ps = state;
 806
 807         avl_for_each_element(&devices, dev, avl) {
 808                 struct device_settings *s = &dev->settings;
 809                 unsigned int apply_mask = 0;
 810
 811                 if (!(s->flags & DEV_OPT_RPS)) {
 812                         s->rps = default_ps;
 813                         apply_mask |= DEV_OPT_RPS;
 814                 }
 815
 816                 if (!(s->flags & DEV_OPT_XPS)) {
 817                         s->xps = default_ps;
 818                         apply_mask |= DEV_OPT_XPS;
 819                 }
 820
 821                 if (!apply_mask)
 822                         continue;
 823
 824                 if (!(dev->external || (dev->present && dev->active)) ||
 825                                 dev->config_pending)
 826                         continue;
 827
 828                 system_if_apply_settings(dev, s, apply_mask);
 829         }
 830 }
 831
 832 struct device *
 833 device_create(const char *name, const struct device_type *type,
 834               struct blob_attr *config)
 835 {
 836         struct device *odev = NULL, *dev;
 837         enum dev_change_type change;
 838
 839         odev = device_get(name, false);
 840         if (odev) {
 841                 odev->current_config = true;
 842                 change = device_apply_config(odev, type, config);
 843                 switch (change) {
 844                 case DEV_CONFIG_RECREATE:
 845                         D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
 846                         device_delete(odev);
 847                         break;
 848                 default:
 849                         return odev;
 850                 }
 851         } else
 852                 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
 853
 854         config = blob_memdup(config);
 855         if (!config)
 856                 return NULL;
 857
 858         dev = type->create(name, config);
 859         if (!dev)
 860                 return NULL;
 861
 862         dev->current_config = true;
 863         dev->config = config;
 864         if (odev)
 865                 device_replace(dev, odev);
 866
 867         if (!config_init && dev->config_pending) {
 868                 type->config_init(dev);
 869                 dev->config_pending = false;
 870         }
 871
 872         return dev;
 873 }
 874
 875 void
 876 device_dump_status(struct blob_buf *b, struct device *dev)
 877 {
 878         struct device_settings st;
 879         void *c, *s;
 880
 881         if (!dev) {
 882                 avl_for_each_element(&devices, dev, avl) {
 883                         if (!dev->present)
 884                                 continue;
 885                         c = blobmsg_open_table(b, dev->ifname);
 886                         device_dump_status(b, dev);
 887                         blobmsg_close_table(b, c);
 888                 }
 889
 890                 return;
 891         }
 892
 893         blobmsg_add_u8(b, "external", dev->external);
 894         blobmsg_add_u8(b, "present", dev->present);
 895         blobmsg_add_string(b, "type", dev->type->name);
 896
 897         if (!dev->present)
 898                 return;
 899
 900         blobmsg_add_u8(b, "up", !!dev->active);
 901         blobmsg_add_u8(b, "carrier", !!dev->link_active);
 902
 903         if (dev->type->dump_info)
 904                 dev->type->dump_info(dev, b);
 905         else
 906                 system_if_dump_info(dev, b);
 907
 908         if (dev->active) {
 909                 device_merge_settings(dev, &st);
 910                 if (st.flags & DEV_OPT_MTU)
 911                         blobmsg_add_u32(b, "mtu", st.mtu);
 912                 if (st.flags & DEV_OPT_MTU6)
 913                         blobmsg_add_u32(b, "mtu6", st.mtu6);
 914                 if (st.flags & DEV_OPT_MACADDR)
 915                         blobmsg_add_string(b, "macaddr", format_macaddr(st.macaddr));
 916                 if (st.flags & DEV_OPT_TXQUEUELEN)
 917                         blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
 918                 if (st.flags & DEV_OPT_IPV6)
 919                         blobmsg_add_u8(b, "ipv6", st.ipv6);
 920                 if (st.flags & DEV_OPT_PROMISC)
 921                         blobmsg_add_u8(b, "promisc", st.promisc);
 922                 if (st.flags & DEV_OPT_RPFILTER)
 923                         blobmsg_add_u32(b, "rpfilter", st.rpfilter);
 924                 if (st.flags & DEV_OPT_ACCEPTLOCAL)
 925                         blobmsg_add_u8(b, "acceptlocal", st.acceptlocal);
 926                 if (st.flags & DEV_OPT_IGMPVERSION)
 927                         blobmsg_add_u32(b, "igmpversion", st.igmpversion);
 928                 if (st.flags & DEV_OPT_MLDVERSION)
 929                         blobmsg_add_u32(b, "mldversion", st.mldversion);
 930                 if (st.flags & DEV_OPT_NEIGHREACHABLETIME) {
 931                         blobmsg_add_u32(b, "neigh4reachabletime", st.neigh4reachabletime);
 932                         blobmsg_add_u32(b, "neigh6reachabletime", st.neigh6reachabletime);
 933                 }
 934                 if (st.flags & DEV_OPT_DADTRANSMITS)
 935                         blobmsg_add_u32(b, "dadtransmits", st.dadtransmits);
 936                 if (st.flags & DEV_OPT_MULTICAST_TO_UNICAST)
 937                         blobmsg_add_u8(b, "multicast_to_unicast", st.multicast_to_unicast);
 938                 if (st.flags & DEV_OPT_MULTICAST_ROUTER)
 939                         blobmsg_add_u32(b, "multicast_router", st.multicast_router);
 940                 if (st.flags & DEV_OPT_MULTICAST)
 941                         blobmsg_add_u8(b, "multicast", st.multicast);
 942         }
 943
 944         s = blobmsg_open_table(b, "statistics");
 945         if (dev->type->dump_stats)
 946                 dev->type->dump_stats(dev, b);
 947         else
 948                 system_if_dump_stats(dev, b);
 949         blobmsg_close_table(b, s);
 950 }