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         dep->claimed = true;
 337         D(DEVICE, "Claim %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active + 1);
 338         if (++dev->active != 1)
 339                 return 0;
 340
 341         device_broadcast_event(dev, DEV_EVENT_SETUP);
 342         if (dev->external) {
 343                 /* Get ifindex for external claimed devices so a valid   */
 344                 /* ifindex is in place avoiding possible race conditions */
 345                 device_set_ifindex(dev, system_if_resolve(dev));
 346                 if (!dev->ifindex)
 347                         ret = -1;
 348
 349                 system_if_get_settings(dev, &dev->orig_settings);
 350         } else
 351                 ret = dev->set_state(dev, true);
 352
 353         if (ret == 0)
 354                 device_broadcast_event(dev, DEV_EVENT_UP);
 355         else {
 356                 D(DEVICE, "claim %s %s failed: %d\n", dev->type->name, dev->ifname, ret);
 357                 dev->active = 0;
 358                 dep->claimed = false;
 359         }
 360
 361         return ret;
 362 }
 363
 364 void device_release(struct device_user *dep)
 365 {
 366         struct device *dev = dep->dev;
 367
 368         if (!dep->claimed)
 369                 return;
 370
 371         dep->claimed = false;
 372         dev->active--;
 373         D(DEVICE, "Release %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active);
 374         assert(dev->active >= 0);
 375
 376         if (dev->active)
 377                 return;
 378
 379         device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
 380         if (!dev->external)
 381                 dev->set_state(dev, false);
 382         device_broadcast_event(dev, DEV_EVENT_DOWN);
 383 }
 384
 385 int device_check_state(struct device *dev)
 386 {
 387         if (!dev->type->check_state)
 388                 return simple_device_type.check_state(dev);
 389
 390         return dev->type->check_state(dev);
 391 }
 392
 393 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
 394 {
 395         assert(dev);
 396         assert(type);
 397
 398         if (name)
 399                 strncpy(dev->ifname, name, IFNAMSIZ);
 400
 401         D(DEVICE, "Initialize device '%s'\n", dev->ifname);
 402         INIT_SAFE_LIST(&dev->users);
 403         INIT_SAFE_LIST(&dev->aliases);
 404         dev->type = type;
 405
 406         if (!dev->set_state)
 407                 dev->set_state = set_device_state;
 408 }
 409
 410 int device_init(struct device *dev, const struct device_type *type, const char *ifname)
 411 {
 412         int ret;
 413
 414         device_init_virtual(dev, type, ifname);
 415
 416         dev->avl.key = dev->ifname;
 417
 418         ret = avl_insert(&devices, &dev->avl);
 419         if (ret < 0)
 420                 return ret;
 421
 422         system_if_clear_state(dev);
 423         device_check_state(dev);
 424         dev->settings.rps = default_ps;
 425         dev->settings.xps = default_ps;
 426
 427         return 0;
 428 }
 429
 430 static struct device *
 431 device_create_default(const char *name, bool external)
 432 {
 433         struct device *dev;
 434
 435         if (!external && system_if_force_external(name))
 436                 return NULL;
 437
 438         D(DEVICE, "Create simple device '%s'\n", name);
 439         dev = calloc(1, sizeof(*dev));
 440         if (!dev)
 441                 return NULL;
 442
 443         dev->external = external;
 444         dev->set_state = simple_device_set_state;
 445         device_init(dev, &simple_device_type, name);
 446         dev->default_config = true;
 447         if (external)
 448                 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
 449         return dev;
 450 }
 451
 452 struct device *
 453 device_get(const char *name, int create)
 454 {
 455         struct device *dev;
 456
 457         if (strchr(name, '.'))
 458                 return get_vlan_device_chain(name, create);
 459
 460         if (name[0] == '@')
 461                 return device_alias_get(name + 1);
 462
 463         dev = avl_find_element(&devices, name, dev, avl);
 464         if (dev) {
 465                 if (create > 1 && !dev->external) {
 466                         system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
 467                         dev->external = true;
 468                         device_set_present(dev, true);
 469                 }
 470                 return dev;
 471         }
 472
 473         if (!create)
 474                 return NULL;
 475
 476         return device_create_default(name, create > 1);
 477 }
 478
 479 static void
 480 device_delete(struct device *dev)
 481 {
 482         if (!dev->avl.key)
 483                 return;
 484
 485         D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
 486         avl_delete(&devices, &dev->avl);
 487         dev->avl.key = NULL;
 488 }
 489
 490 static int device_cleanup_cb(void *ctx, struct safe_list *list)
 491 {
 492         struct device_user *dep = container_of(list, struct device_user, list);
 493         if (dep->cb)
 494                 dep->cb(dep, DEV_EVENT_REMOVE);
 495
 496         device_release(dep);
 497         return 0;
 498 }
 499
 500 void device_cleanup(struct device *dev)
 501 {
 502         D(DEVICE, "Clean up device '%s'\n", dev->ifname);
 503         safe_list_for_each(&dev->users, device_cleanup_cb, NULL);
 504         safe_list_for_each(&dev->aliases, device_cleanup_cb, NULL);
 505         device_delete(dev);
 506 }
 507
 508 static void __device_set_present(struct device *dev, bool state)
 509 {
 510         if (dev->present == state)
 511                 return;
 512
 513         dev->present = state;
 514         device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
 515 }
 516
 517 void
 518 device_refresh_present(struct device *dev)
 519 {
 520         bool state = dev->sys_present;
 521
 522         if (dev->disabled || dev->deferred)
 523                 state = false;
 524
 525         __device_set_present(dev, state);
 526 }
 527
 528 void device_set_present(struct device *dev, bool state)
 529 {
 530         if (dev->sys_present == state)
 531                 return;
 532
 533         D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
 534         dev->sys_present = state;
 535         device_refresh_present(dev);
 536 }
 537
 538 void device_set_link(struct device *dev, bool state)
 539 {
 540         if (dev->link_active == state)
 541                 return;
 542
 543         netifd_log_message(L_NOTICE, "%s '%s' link is %s\n", dev->type->name, dev->ifname, state ? "up" : "down" );
 544
 545         dev->link_active = state;
 546         device_broadcast_event(dev, state ? DEV_EVENT_LINK_UP : DEV_EVENT_LINK_DOWN);
 547 }
 548
 549 void device_set_ifindex(struct device *dev, int ifindex)
 550 {
 551         if (dev->ifindex == ifindex)
 552                 return;
 553
 554         dev->ifindex = ifindex;
 555         device_broadcast_event(dev, DEV_EVENT_UPDATE_IFINDEX);
 556 }
 557
 558 static int device_refcount(struct device *dev)
 559 {
 560         struct list_head *list;
 561         int count = 0;
 562
 563         list_for_each(list, &dev->users.list)
 564                 count++;
 565
 566         list_for_each(list, &dev->aliases.list)
 567                 count++;
 568
 569         return count;
 570 }
 571
 572 static void
 573 __device_add_user(struct device_user *dep, struct device *dev)
 574 {
 575         struct safe_list *head;
 576
 577         dep->dev = dev;
 578
 579         if (dep->alias)
 580                 head = &dev->aliases;
 581         else
 582                 head = &dev->users;
 583
 584         safe_list_add(&dep->list, head);
 585         D(DEVICE, "Add user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
 586
 587         if (dep->cb && dev->present) {
 588                 dep->cb(dep, DEV_EVENT_ADD);
 589                 if (dev->active)
 590                         dep->cb(dep, DEV_EVENT_UP);
 591
 592                 if (dev->link_active)
 593                         dep->cb(dep, DEV_EVENT_LINK_UP);
 594         }
 595 }
 596
 597 void device_add_user(struct device_user *dep, struct device *dev)
 598 {
 599         if (dep->dev == dev)
 600                 return;
 601
 602         if (dep->dev)
 603                 device_remove_user(dep);
 604
 605         if (!dev)
 606                 return;
 607
 608         __device_add_user(dep, dev);
 609 }
 610
 611 void
 612 device_free(struct device *dev)
 613 {
 614         __devlock++;
 615         free(dev->config);
 616         device_cleanup(dev);
 617         dev->type->free(dev);
 618         __devlock--;
 619 }
 620
 621 static void
 622 __device_free_unused(struct device *dev)
 623 {
 624         if (!safe_list_empty(&dev->users) ||
 625                 !safe_list_empty(&dev->aliases) ||
 626             dev->current_config || __devlock)
 627                 return;
 628
 629         device_free(dev);
 630 }
 631
 632 void device_remove_user(struct device_user *dep)
 633 {
 634         struct device *dev = dep->dev;
 635
 636         if (!dep->dev)
 637                 return;
 638
 639         dep->hotplug = false;
 640         if (dep->claimed)
 641                 device_release(dep);
 642
 643         safe_list_del(&dep->list);
 644         dep->dev = NULL;
 645         D(DEVICE, "Remove user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
 646         __device_free_unused(dev);
 647 }
 648
 649 void
 650 device_free_unused(struct device *dev)
 651 {
 652         struct device *tmp;
 653
 654         if (dev)
 655                 return __device_free_unused(dev);
 656
 657         avl_for_each_element_safe(&devices, dev, avl, tmp)
 658                 __device_free_unused(dev);
 659 }
 660
 661 void
 662 device_init_pending(void)
 663 {
 664         struct device *dev, *tmp;
 665
 666         avl_for_each_element_safe(&devices, dev, avl, tmp) {
 667                 if (!dev->config_pending)
 668                         continue;
 669
 670                 dev->type->config_init(dev);
 671                 dev->config_pending = false;
 672         }
 673 }
 674
 675 static enum dev_change_type
 676 device_set_config(struct device *dev, const struct device_type *type,
 677                   struct blob_attr *attr)
 678 {
 679         struct blob_attr *tb[__DEV_ATTR_MAX];
 680         const struct uci_blob_param_list *cfg = type->config_params;
 681
 682         if (type != dev->type)
 683                 return DEV_CONFIG_RECREATE;
 684
 685         if (dev->type->reload)
 686                 return dev->type->reload(dev, attr);
 687
 688         if (uci_blob_check_equal(dev->config, attr, cfg))
 689                 return DEV_CONFIG_NO_CHANGE;
 690
 691         if (cfg == &device_attr_list) {
 692                 memset(tb, 0, sizeof(tb));
 693
 694                 if (attr)
 695                         blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
 696                                 blob_data(attr), blob_len(attr));
 697
 698                 device_init_settings(dev, tb);
 699                 return DEV_CONFIG_RESTART;
 700         } else
 701                 return DEV_CONFIG_RECREATE;
 702 }
 703
 704 enum dev_change_type
 705 device_apply_config(struct device *dev, const struct device_type *type,
 706                     struct blob_attr *config)
 707 {
 708         enum dev_change_type change;
 709
 710         change = device_set_config(dev, type, config);
 711         if (dev->external) {
 712                 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
 713                 change = DEV_CONFIG_APPLIED;
 714         }
 715
 716         switch (change) {
 717                 case DEV_CONFIG_RESTART:
 718                 case DEV_CONFIG_APPLIED:
 719                         D(DEVICE, "Device '%s': config applied\n", dev->ifname);
 720                         config = blob_memdup(config);
 721                         free(dev->config);
 722                         dev->config = config;
 723                         if (change == DEV_CONFIG_RESTART && dev->present) {
 724                                 device_set_present(dev, false);
 725                                 if (dev->active && !dev->external) {
 726                                         dev->set_state(dev, false);
 727                                         dev->set_state(dev, true);
 728                                 }
 729                                 device_set_present(dev, true);
 730                         }
 731                         break;
 732                 case DEV_CONFIG_NO_CHANGE:
 733                         D(DEVICE, "Device '%s': no configuration change\n", dev->ifname);
 734                         break;
 735                 case DEV_CONFIG_RECREATE:
 736                         break;
 737         }
 738
 739         return change;
 740 }
 741
 742 static void
 743 device_replace(struct device *dev, struct device *odev)
 744 {
 745         struct device_user *dep, *tmp;
 746
 747         __devlock++;
 748         if (odev->present)
 749                 device_set_present(odev, false);
 750
 751         list_for_each_entry_safe(dep, tmp, &odev->users.list, list.list) {
 752                 device_release(dep);
 753                 safe_list_del(&dep->list);
 754                 __device_add_user(dep, dev);
 755         }
 756         __devlock--;
 757
 758         device_free(odev);
 759 }
 760
 761 void
 762 device_reset_config(void)
 763 {
 764         struct device *dev;
 765
 766         avl_for_each_element(&devices, dev, avl)
 767                 dev->current_config = false;
 768 }
 769
 770 void
 771 device_reset_old(void)
 772 {
 773         struct device *dev, *tmp, *ndev;
 774
 775         avl_for_each_element_safe(&devices, dev, avl, tmp) {
 776                 if (dev->current_config || dev->default_config)
 777                         continue;
 778
 779                 if (dev->type != &simple_device_type)
 780                         continue;
 781
 782                 ndev = device_create_default(dev->ifname, dev->external);
 783                 if (!ndev)
 784                         continue;
 785
 786                 device_replace(ndev, dev);
 787         }
 788 }
 789
 790 void
 791 device_set_default_ps(bool state)
 792 {
 793         struct device *dev;
 794
 795         if (state == default_ps)
 796                 return;
 797
 798         default_ps = state;
 799
 800         avl_for_each_element(&devices, dev, avl) {
 801                 struct device_settings *s = &dev->settings;
 802                 unsigned int apply_mask = 0;
 803
 804                 if (!(s->flags & DEV_OPT_RPS)) {
 805                         s->rps = default_ps;
 806                         apply_mask |= DEV_OPT_RPS;
 807                 }
 808
 809                 if (!(s->flags & DEV_OPT_XPS)) {
 810                         s->xps = default_ps;
 811                         apply_mask |= DEV_OPT_XPS;
 812                 }
 813
 814                 if (!apply_mask)
 815                         continue;
 816
 817                 if (!(dev->external || (dev->present && dev->active)) ||
 818                                 dev->config_pending)
 819                         continue;
 820
 821                 system_if_apply_settings(dev, s, apply_mask);
 822         }
 823 }
 824
 825 struct device *
 826 device_create(const char *name, const struct device_type *type,
 827               struct blob_attr *config)
 828 {
 829         struct device *odev = NULL, *dev;
 830         enum dev_change_type change;
 831
 832         odev = device_get(name, false);
 833         if (odev) {
 834                 odev->current_config = true;
 835                 change = device_apply_config(odev, type, config);
 836                 switch (change) {
 837                 case DEV_CONFIG_RECREATE:
 838                         D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
 839                         device_delete(odev);
 840                         break;
 841                 default:
 842                         return odev;
 843                 }
 844         } else
 845                 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
 846
 847         config = blob_memdup(config);
 848         if (!config)
 849                 return NULL;
 850
 851         dev = type->create(name, config);
 852         if (!dev)
 853                 return NULL;
 854
 855         dev->current_config = true;
 856         dev->config = config;
 857         if (odev)
 858                 device_replace(dev, odev);
 859
 860         if (!config_init && dev->config_pending) {
 861                 type->config_init(dev);
 862                 dev->config_pending = false;
 863         }
 864
 865         return dev;
 866 }
 867
 868 void
 869 device_dump_status(struct blob_buf *b, struct device *dev)
 870 {
 871         struct device_settings st;
 872         void *c, *s;
 873
 874         if (!dev) {
 875                 avl_for_each_element(&devices, dev, avl) {
 876                         if (!dev->present)
 877                                 continue;
 878                         c = blobmsg_open_table(b, dev->ifname);
 879                         device_dump_status(b, dev);
 880                         blobmsg_close_table(b, c);
 881                 }
 882
 883                 return;
 884         }
 885
 886         blobmsg_add_u8(b, "external", dev->external);
 887         blobmsg_add_u8(b, "present", dev->present);
 888         blobmsg_add_string(b, "type", dev->type->name);
 889
 890         if (!dev->present)
 891                 return;
 892
 893         blobmsg_add_u8(b, "up", !!dev->active);
 894         blobmsg_add_u8(b, "carrier", !!dev->link_active);
 895
 896         if (dev->type->dump_info)
 897                 dev->type->dump_info(dev, b);
 898         else
 899                 system_if_dump_info(dev, b);
 900
 901         if (dev->active) {
 902                 device_merge_settings(dev, &st);
 903                 if (st.flags & DEV_OPT_MTU)
 904                         blobmsg_add_u32(b, "mtu", st.mtu);
 905                 if (st.flags & DEV_OPT_MTU6)
 906                         blobmsg_add_u32(b, "mtu6", st.mtu6);
 907                 if (st.flags & DEV_OPT_MACADDR)
 908                         blobmsg_add_string(b, "macaddr", format_macaddr(st.macaddr));
 909                 if (st.flags & DEV_OPT_TXQUEUELEN)
 910                         blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
 911                 if (st.flags & DEV_OPT_IPV6)
 912                         blobmsg_add_u8(b, "ipv6", st.ipv6);
 913                 if (st.flags & DEV_OPT_PROMISC)
 914                         blobmsg_add_u8(b, "promisc", st.promisc);
 915                 if (st.flags & DEV_OPT_RPFILTER)
 916                         blobmsg_add_u32(b, "rpfilter", st.rpfilter);
 917                 if (st.flags & DEV_OPT_ACCEPTLOCAL)
 918                         blobmsg_add_u8(b, "acceptlocal", st.acceptlocal);
 919                 if (st.flags & DEV_OPT_IGMPVERSION)
 920                         blobmsg_add_u32(b, "igmpversion", st.igmpversion);
 921                 if (st.flags & DEV_OPT_MLDVERSION)
 922                         blobmsg_add_u32(b, "mldversion", st.mldversion);
 923                 if (st.flags & DEV_OPT_NEIGHREACHABLETIME) {
 924                         blobmsg_add_u32(b, "neigh4reachabletime", st.neigh4reachabletime);
 925                         blobmsg_add_u32(b, "neigh6reachabletime", st.neigh6reachabletime);
 926                 }
 927                 if (st.flags & DEV_OPT_DADTRANSMITS)
 928                         blobmsg_add_u32(b, "dadtransmits", st.dadtransmits);
 929                 if (st.flags & DEV_OPT_MULTICAST_TO_UNICAST)
 930                         blobmsg_add_u8(b, "multicast_to_unicast", st.multicast_to_unicast);
 931                 if (st.flags & DEV_OPT_MULTICAST_ROUTER)
 932                         blobmsg_add_u32(b, "multicast_router", st.multicast_router);
 933                 if (st.flags & DEV_OPT_MULTICAST)
 934                         blobmsg_add_u8(b, "multicast", st.multicast);
 935         }
 936
 937         s = blobmsg_open_table(b, "statistics");
 938         if (dev->type->dump_stats)
 939                 dev->type->dump_stats(dev, b);
 940         else
 941                 system_if_dump_stats(dev, b);
 942         blobmsg_close_table(b, s);
 943 }