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 <libubox/list.h>
  28
  29 #include "netifd.h"
  30 #include "system.h"
  31 #include "config.h"
  32
  33 static struct list_head devtypes = LIST_HEAD_INIT(devtypes);
  34 static struct avl_tree devices;
  35 static bool default_ps = true;
  36
  37 static const struct blobmsg_policy dev_attrs[__DEV_ATTR_MAX] = {
  38         [DEV_ATTR_TYPE] = { .name = "type", .type = BLOBMSG_TYPE_STRING },
  39         [DEV_ATTR_MTU] = { .name = "mtu", .type = BLOBMSG_TYPE_INT32 },
  40         [DEV_ATTR_MTU6] = { .name = "mtu6", .type = BLOBMSG_TYPE_INT32 },
  41         [DEV_ATTR_MACADDR] = { .name = "macaddr", .type = BLOBMSG_TYPE_STRING },
  42         [DEV_ATTR_TXQUEUELEN] = { .name = "txqueuelen", .type = BLOBMSG_TYPE_INT32 },
  43         [DEV_ATTR_ENABLED] = { .name = "enabled", .type = BLOBMSG_TYPE_BOOL },
  44         [DEV_ATTR_IPV6] = { .name = "ipv6", .type = BLOBMSG_TYPE_BOOL },
  45         [DEV_ATTR_PROMISC] = { .name = "promisc", .type = BLOBMSG_TYPE_BOOL },
  46         [DEV_ATTR_RPFILTER] = { .name = "rpfilter", .type = BLOBMSG_TYPE_STRING },
  47         [DEV_ATTR_ACCEPTLOCAL] = { .name = "acceptlocal", .type = BLOBMSG_TYPE_BOOL },
  48         [DEV_ATTR_IGMPVERSION] = { .name = "igmpversion", .type = BLOBMSG_TYPE_INT32 },
  49         [DEV_ATTR_MLDVERSION] = { .name = "mldversion", .type = BLOBMSG_TYPE_INT32 },
  50         [DEV_ATTR_NEIGHREACHABLETIME] = { .name = "neighreachabletime", .type = BLOBMSG_TYPE_INT32 },
  51         [DEV_ATTR_NEIGHGCSTALETIME] = { .name = "neighgcstaletime", .type = BLOBMSG_TYPE_INT32 },
  52         [DEV_ATTR_RPS] = { .name = "rps", .type = BLOBMSG_TYPE_BOOL },
  53         [DEV_ATTR_XPS] = { .name = "xps", .type = BLOBMSG_TYPE_BOOL },
  54         [DEV_ATTR_DADTRANSMITS] = { .name = "dadtransmits", .type = BLOBMSG_TYPE_INT32 },
  55         [DEV_ATTR_MULTICAST_TO_UNICAST] = { .name = "multicast_to_unicast", .type = BLOBMSG_TYPE_BOOL },
  56         [DEV_ATTR_MULTICAST_ROUTER] = { .name = "multicast_router", .type = BLOBMSG_TYPE_INT32 },
  57         [DEV_ATTR_MULTICAST_FAST_LEAVE] = { .name = "multicast_fast_leave", . type = BLOBMSG_TYPE_BOOL },
  58         [DEV_ATTR_MULTICAST] = { .name ="multicast", .type = BLOBMSG_TYPE_BOOL },
  59         [DEV_ATTR_LEARNING] = { .name ="learning", .type = BLOBMSG_TYPE_BOOL },
  60         [DEV_ATTR_UNICAST_FLOOD] = { .name ="unicast_flood", .type = BLOBMSG_TYPE_BOOL },
  61         [DEV_ATTR_SENDREDIRECTS] = { .name = "sendredirects", .type = BLOBMSG_TYPE_BOOL },
  62 };
  63
  64 const struct uci_blob_param_list device_attr_list = {
  65         .n_params = __DEV_ATTR_MAX,
  66         .params = dev_attrs,
  67 };
  68
  69 static int __devlock = 0;
  70
  71 int device_type_add(struct device_type *devtype)
  72 {
  73         if (device_type_get(devtype->name)) {
  74                 netifd_log_message(L_WARNING, "Device handler '%s' already exists\n",
  75                                    devtype->name);
  76                 return 1;
  77         }
  78
  79         netifd_log_message(L_NOTICE, "Added device handler type: %s\n",
  80                 devtype->name);
  81
  82         list_add(&devtype->list, &devtypes);
  83         return 0;
  84 }
  85
  86 /* Retrieve the device type for the given name. If 'bridge' is true, the type
  87  * must have bridge capabilities
  88  */
  89 struct device_type *
  90 device_type_get(const char *tname)
  91 {
  92         struct device_type *cur;
  93
  94         list_for_each_entry(cur, &devtypes, list)
  95                 if (!strcmp(cur->name, tname))
  96                         return cur;
  97
  98         return NULL;
  99 }
 100
 101 void device_lock(void)
 102 {
 103         __devlock++;
 104 }
 105
 106 void device_unlock(void)
 107 {
 108         __devlock--;
 109         if (!__devlock)
 110                 device_free_unused(NULL);
 111 }
 112
 113 static int set_device_state(struct device *dev, bool state)
 114 {
 115         if (state) {
 116                 /* Get ifindex for all devices being enabled so a valid  */
 117                 /* ifindex is in place avoiding possible race conditions */
 118                 device_set_ifindex(dev, system_if_resolve(dev));
 119                 if (!dev->ifindex)
 120                         return -1;
 121
 122                 system_if_up(dev);
 123         }
 124         else
 125                 system_if_down(dev);
 126
 127         return 0;
 128 }
 129
 130 static int
 131 simple_device_set_state(struct device *dev, bool state)
 132 {
 133         struct device *pdev;
 134         int ret = 0;
 135
 136         pdev = dev->parent.dev;
 137         if (state && !pdev) {
 138                 pdev = system_if_get_parent(dev);
 139                 if (pdev)
 140                         device_add_user(&dev->parent, pdev);
 141         }
 142
 143         if (pdev) {
 144                 if (state)
 145                         ret = device_claim(&dev->parent);
 146                 else
 147                         device_release(&dev->parent);
 148
 149                 if (ret < 0)
 150                         return ret;
 151         }
 152         return set_device_state(dev, state);
 153 }
 154
 155 static struct device *
 156 simple_device_create(const char *name, struct device_type *devtype,
 157                      struct blob_attr *attr)
 158 {
 159         struct blob_attr *tb[__DEV_ATTR_MAX];
 160         struct device *dev = NULL;
 161
 162         /* device type is unused for simple devices */
 163         devtype = NULL;
 164
 165         blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb, blob_data(attr), blob_len(attr));
 166         dev = device_get(name, true);
 167         if (!dev)
 168                 return NULL;
 169
 170         dev->set_state = simple_device_set_state;
 171         device_init_settings(dev, tb);
 172
 173         return dev;
 174 }
 175
 176 static void simple_device_free(struct device *dev)
 177 {
 178         if (dev->parent.dev)
 179                 device_remove_user(&dev->parent);
 180         free(dev);
 181 }
 182
 183 struct device_type simple_device_type = {
 184         .name = "Network device",
 185         .config_params = &device_attr_list,
 186
 187         .create = simple_device_create,
 188         .check_state = system_if_check,
 189         .free = simple_device_free,
 190 };
 191
 192 static void
 193 device_merge_settings(struct device *dev, struct device_settings *n)
 194 {
 195         struct device_settings *os = &dev->orig_settings;
 196         struct device_settings *s = &dev->settings;
 197
 198         memset(n, 0, sizeof(*n));
 199         n->mtu = s->flags & DEV_OPT_MTU ? s->mtu : os->mtu;
 200         n->mtu6 = s->flags & DEV_OPT_MTU6 ? s->mtu6 : os->mtu6;
 201         n->txqueuelen = s->flags & DEV_OPT_TXQUEUELEN ?
 202                 s->txqueuelen : os->txqueuelen;
 203         memcpy(n->macaddr,
 204                 (s->flags & DEV_OPT_MACADDR ? s->macaddr : os->macaddr),
 205                 sizeof(n->macaddr));
 206         n->ipv6 = s->flags & DEV_OPT_IPV6 ? s->ipv6 : os->ipv6;
 207         n->promisc = s->flags & DEV_OPT_PROMISC ? s->promisc : os->promisc;
 208         n->rpfilter = s->flags & DEV_OPT_RPFILTER ? s->rpfilter : os->rpfilter;
 209         n->acceptlocal = s->flags & DEV_OPT_ACCEPTLOCAL ? s->acceptlocal : os->acceptlocal;
 210         n->igmpversion = s->flags & DEV_OPT_IGMPVERSION ? s->igmpversion : os->igmpversion;
 211         n->mldversion = s->flags & DEV_OPT_MLDVERSION ? s->mldversion : os->mldversion;
 212         n->neigh4reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
 213                 s->neigh4reachabletime : os->neigh4reachabletime;
 214         n->neigh6reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
 215                 s->neigh6reachabletime : os->neigh6reachabletime;
 216         n->neigh4gcstaletime = s->flags & DEV_OPT_NEIGHGCSTALETIME ?
 217                 s->neigh4gcstaletime : os->neigh4gcstaletime;
 218         n->neigh6gcstaletime = s->flags & DEV_OPT_NEIGHGCSTALETIME ?
 219                 s->neigh6gcstaletime : os->neigh6gcstaletime;
 220         n->dadtransmits = s->flags & DEV_OPT_DADTRANSMITS ?
 221                 s->dadtransmits : os->dadtransmits;
 222         n->multicast = s->flags & DEV_OPT_MULTICAST ?
 223                 s->multicast : os->multicast;
 224         n->multicast_to_unicast = s->multicast_to_unicast;
 225         n->multicast_router = s->multicast_router;
 226         n->multicast_fast_leave = s->multicast_fast_leave;
 227         n->learning = s->learning;
 228         n->unicast_flood = s->unicast_flood;
 229         n->sendredirects = s->flags & DEV_OPT_SENDREDIRECTS ?
 230                 s->sendredirects : os->sendredirects;
 231         n->flags = s->flags | os->flags | os->valid_flags;
 232 }
 233
 234 void
 235 device_init_settings(struct device *dev, struct blob_attr **tb)
 236 {
 237         struct device_settings *s = &dev->settings;
 238         struct blob_attr *cur;
 239         struct ether_addr *ea;
 240         bool disabled = false;
 241
 242         s->flags = 0;
 243         if ((cur = tb[DEV_ATTR_ENABLED]))
 244                 disabled = !blobmsg_get_bool(cur);
 245
 246         if ((cur = tb[DEV_ATTR_MTU]) && blobmsg_get_u32(cur) >= 68) {
 247                 s->mtu = blobmsg_get_u32(cur);
 248                 s->flags |= DEV_OPT_MTU;
 249         }
 250
 251         if ((cur = tb[DEV_ATTR_MTU6]) && blobmsg_get_u32(cur) >= 1280) {
 252                 s->mtu6 = blobmsg_get_u32(cur);
 253                 s->flags |= DEV_OPT_MTU6;
 254         }
 255
 256         if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
 257                 s->txqueuelen = blobmsg_get_u32(cur);
 258                 s->flags |= DEV_OPT_TXQUEUELEN;
 259         }
 260
 261         if ((cur = tb[DEV_ATTR_MACADDR])) {
 262                 ea = ether_aton(blobmsg_data(cur));
 263                 if (ea) {
 264                         memcpy(s->macaddr, ea, 6);
 265                         s->flags |= DEV_OPT_MACADDR;
 266                 }
 267         }
 268
 269         if ((cur = tb[DEV_ATTR_IPV6])) {
 270                 s->ipv6 = blobmsg_get_bool(cur);
 271                 s->flags |= DEV_OPT_IPV6;
 272         }
 273
 274         if ((cur = tb[DEV_ATTR_PROMISC])) {
 275                 s->promisc = blobmsg_get_bool(cur);
 276                 s->flags |= DEV_OPT_PROMISC;
 277         }
 278
 279         if ((cur = tb[DEV_ATTR_RPFILTER])) {
 280                 if (system_resolve_rpfilter(blobmsg_data(cur), &s->rpfilter))
 281                         s->flags |= DEV_OPT_RPFILTER;
 282                 else
 283                         DPRINTF("Failed to resolve rpfilter: %s\n", (char *) blobmsg_data(cur));
 284         }
 285
 286         if ((cur = tb[DEV_ATTR_ACCEPTLOCAL])) {
 287                 s->acceptlocal = blobmsg_get_bool(cur);
 288                 s->flags |= DEV_OPT_ACCEPTLOCAL;
 289         }
 290
 291         if ((cur = tb[DEV_ATTR_IGMPVERSION])) {
 292                 s->igmpversion = blobmsg_get_u32(cur);
 293                 if (s->igmpversion >= 1 && s->igmpversion <= 3)
 294                         s->flags |= DEV_OPT_IGMPVERSION;
 295                 else
 296                         DPRINTF("Failed to resolve igmpversion: %d\n", blobmsg_get_u32(cur));
 297         }
 298
 299         if ((cur = tb[DEV_ATTR_MLDVERSION])) {
 300                 s->mldversion = blobmsg_get_u32(cur);
 301                 if (s->mldversion >= 1 && s->mldversion <= 2)
 302                         s->flags |= DEV_OPT_MLDVERSION;
 303                 else
 304                         DPRINTF("Failed to resolve mldversion: %d\n", blobmsg_get_u32(cur));
 305         }
 306
 307         if ((cur = tb[DEV_ATTR_NEIGHREACHABLETIME])) {
 308                 s->neigh6reachabletime = s->neigh4reachabletime = blobmsg_get_u32(cur);
 309                 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
 310         }
 311
 312         if ((cur = tb[DEV_ATTR_NEIGHGCSTALETIME])) {
 313                 s->neigh6gcstaletime = s->neigh4gcstaletime = blobmsg_get_u32(cur);
 314                 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
 315         }
 316
 317         if ((cur = tb[DEV_ATTR_RPS])) {
 318                 s->rps = blobmsg_get_bool(cur);
 319                 s->flags |= DEV_OPT_RPS;
 320         }
 321         else
 322                 s->rps = default_ps;
 323
 324         if ((cur = tb[DEV_ATTR_XPS])) {
 325                 s->xps = blobmsg_get_bool(cur);
 326                 s->flags |= DEV_OPT_XPS;
 327         }
 328         else
 329                 s->xps = default_ps;
 330
 331         if ((cur = tb[DEV_ATTR_DADTRANSMITS])) {
 332                 s->dadtransmits = blobmsg_get_u32(cur);
 333                 s->flags |= DEV_OPT_DADTRANSMITS;
 334         }
 335
 336         if ((cur = tb[DEV_ATTR_MULTICAST_TO_UNICAST])) {
 337                 s->multicast_to_unicast = blobmsg_get_bool(cur);
 338                 s->flags |= DEV_OPT_MULTICAST_TO_UNICAST;
 339         }
 340
 341         if ((cur = tb[DEV_ATTR_MULTICAST_ROUTER])) {
 342                 s->multicast_router = blobmsg_get_u32(cur);
 343                 if (s->multicast_router <= 2)
 344                         s->flags |= DEV_OPT_MULTICAST_ROUTER;
 345                 else
 346                         DPRINTF("Invalid value: %d - (Use 0: never, 1: learn, 2: always)\n", blobmsg_get_u32(cur));
 347         }
 348
 349         if ((cur = tb[DEV_ATTR_MULTICAST_FAST_LEAVE])) {
 350                 s->multicast_fast_leave = blobmsg_get_bool(cur);
 351                 s->flags |= DEV_OPT_MULTICAST_FAST_LEAVE;
 352         }
 353
 354         if ((cur = tb[DEV_ATTR_MULTICAST])) {
 355                 s->multicast = blobmsg_get_bool(cur);
 356                 s->flags |= DEV_OPT_MULTICAST;
 357         }
 358
 359         if ((cur = tb[DEV_ATTR_LEARNING])) {
 360                 s->learning = blobmsg_get_bool(cur);
 361                 s->flags |= DEV_OPT_LEARNING;
 362         }
 363
 364         if ((cur = tb[DEV_ATTR_UNICAST_FLOOD])) {
 365                 s->unicast_flood = blobmsg_get_bool(cur);
 366                 s->flags |= DEV_OPT_UNICAST_FLOOD;
 367         }
 368
 369         if ((cur = tb[DEV_ATTR_SENDREDIRECTS])) {
 370                 s->sendredirects = blobmsg_get_bool(cur);
 371                 s->flags |= DEV_OPT_SENDREDIRECTS;
 372         }
 373
 374         device_set_disabled(dev, disabled);
 375 }
 376
 377 static void __init dev_init(void)
 378 {
 379         avl_init(&devices, avl_strcmp, true, NULL);
 380 }
 381
 382 static int device_broadcast_cb(void *ctx, struct safe_list *list)
 383 {
 384         struct device_user *dep = container_of(list, struct device_user, list);
 385         int *ev = ctx;
 386
 387         /* device might have been removed by an earlier callback */
 388         if (!dep->dev)
 389                 return 0;
 390
 391         if (dep->cb)
 392                 dep->cb(dep, *ev);
 393         return 0;
 394 }
 395
 396 void device_broadcast_event(struct device *dev, enum device_event ev)
 397 {
 398         int dev_ev = ev;
 399
 400         safe_list_for_each(&dev->aliases, device_broadcast_cb, &dev_ev);
 401         safe_list_for_each(&dev->users, device_broadcast_cb, &dev_ev);
 402 }
 403
 404 int device_claim(struct device_user *dep)
 405 {
 406         struct device *dev = dep->dev;
 407         int ret = 0;
 408
 409         if (dep->claimed)
 410                 return 0;
 411
 412         if (!dev)
 413                 return -1;
 414
 415         dep->claimed = true;
 416         D(DEVICE, "Claim %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active + 1);
 417         if (++dev->active != 1)
 418                 return 0;
 419
 420         device_broadcast_event(dev, DEV_EVENT_SETUP);
 421         if (dev->external) {
 422                 /* Get ifindex for external claimed devices so a valid   */
 423                 /* ifindex is in place avoiding possible race conditions */
 424                 device_set_ifindex(dev, system_if_resolve(dev));
 425                 if (!dev->ifindex)
 426                         ret = -1;
 427
 428                 system_if_get_settings(dev, &dev->orig_settings);
 429         } else
 430                 ret = dev->set_state(dev, true);
 431
 432         if (ret == 0)
 433                 device_broadcast_event(dev, DEV_EVENT_UP);
 434         else {
 435                 D(DEVICE, "claim %s %s failed: %d\n", dev->type->name, dev->ifname, ret);
 436                 dev->active = 0;
 437                 dep->claimed = false;
 438         }
 439
 440         return ret;
 441 }
 442
 443 void device_release(struct device_user *dep)
 444 {
 445         struct device *dev = dep->dev;
 446
 447         if (!dep->claimed)
 448                 return;
 449
 450         dep->claimed = false;
 451         dev->active--;
 452         D(DEVICE, "Release %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active);
 453         assert(dev->active >= 0);
 454
 455         if (dev->active)
 456                 return;
 457
 458         device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
 459         if (!dev->external)
 460                 dev->set_state(dev, false);
 461
 462         if (dev->active)
 463                 return;
 464
 465         device_broadcast_event(dev, DEV_EVENT_DOWN);
 466 }
 467
 468 int device_check_state(struct device *dev)
 469 {
 470         if (!dev->type->check_state)
 471                 return simple_device_type.check_state(dev);
 472
 473         return dev->type->check_state(dev);
 474 }
 475
 476 void device_init_virtual(struct device *dev, struct device_type *type, const char *name)
 477 {
 478         assert(dev);
 479         assert(type);
 480
 481         D(DEVICE, "Initialize device '%s'\n", name ? name : "");
 482         INIT_SAFE_LIST(&dev->users);
 483         INIT_SAFE_LIST(&dev->aliases);
 484         dev->type = type;
 485
 486         if (name)
 487                 device_set_ifname(dev, name);
 488
 489         if (!dev->set_state)
 490                 dev->set_state = set_device_state;
 491 }
 492
 493 int device_init(struct device *dev, struct device_type *type, const char *ifname)
 494 {
 495         int ret;
 496
 497         device_init_virtual(dev, type, ifname);
 498
 499         dev->avl.key = dev->ifname;
 500
 501         ret = avl_insert(&devices, &dev->avl);
 502         if (ret < 0)
 503                 return ret;
 504
 505         system_if_clear_state(dev);
 506         device_check_state(dev);
 507         dev->settings.rps = default_ps;
 508         dev->settings.xps = default_ps;
 509
 510         return 0;
 511 }
 512
 513 static struct device *
 514 device_create_default(const char *name, bool external)
 515 {
 516         struct device *dev;
 517
 518         if (!external && system_if_force_external(name))
 519                 return NULL;
 520
 521         D(DEVICE, "Create simple device '%s'\n", name);
 522         dev = calloc(1, sizeof(*dev));
 523         if (!dev)
 524                 return NULL;
 525
 526         dev->external = external;
 527         dev->set_state = simple_device_set_state;
 528         device_init(dev, &simple_device_type, name);
 529         dev->default_config = true;
 530         if (external)
 531                 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
 532         return dev;
 533 }
 534
 535 struct device *
 536 device_find(const char *name)
 537 {
 538         struct device *dev;
 539
 540         return avl_find_element(&devices, name, dev, avl);
 541 }
 542
 543 struct device *
 544 device_get(const char *name, int create)
 545 {
 546         struct device *dev;
 547
 548         if (strchr(name, '.'))
 549                 return get_vlan_device_chain(name, create);
 550
 551         if (name[0] == '@')
 552                 return device_alias_get(name + 1);
 553
 554         dev = avl_find_element(&devices, name, dev, avl);
 555         if (dev) {
 556                 if (create > 1 && !dev->external) {
 557                         system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
 558                         dev->external = true;
 559                         device_set_present(dev, true);
 560                 }
 561                 return dev;
 562         }
 563
 564         if (!create)
 565                 return NULL;
 566
 567         return device_create_default(name, create > 1);
 568 }
 569
 570 static void
 571 device_delete(struct device *dev)
 572 {
 573         if (!dev->avl.key)
 574                 return;
 575
 576         D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
 577         avl_delete(&devices, &dev->avl);
 578         dev->avl.key = NULL;
 579 }
 580
 581 static int device_cleanup_cb(void *ctx, struct safe_list *list)
 582 {
 583         struct device_user *dep = container_of(list, struct device_user, list);
 584         if (dep->cb)
 585                 dep->cb(dep, DEV_EVENT_REMOVE);
 586
 587         device_release(dep);
 588         return 0;
 589 }
 590
 591 void device_cleanup(struct device *dev)
 592 {
 593         D(DEVICE, "Clean up device '%s'\n", dev->ifname);
 594         safe_list_for_each(&dev->users, device_cleanup_cb, NULL);
 595         safe_list_for_each(&dev->aliases, device_cleanup_cb, NULL);
 596         device_delete(dev);
 597 }
 598
 599 static void __device_set_present(struct device *dev, bool state)
 600 {
 601         if (dev->present == state)
 602                 return;
 603
 604         dev->present = state;
 605         device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
 606 }
 607
 608 void
 609 device_refresh_present(struct device *dev)
 610 {
 611         bool state = dev->sys_present;
 612
 613         if (dev->disabled || dev->deferred)
 614                 state = false;
 615
 616         __device_set_present(dev, state);
 617 }
 618
 619 void device_set_present(struct device *dev, bool state)
 620 {
 621         if (dev->sys_present == state)
 622                 return;
 623
 624         D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
 625         dev->sys_present = state;
 626         device_refresh_present(dev);
 627 }
 628
 629 void device_set_link(struct device *dev, bool state)
 630 {
 631         if (dev->link_active == state)
 632                 return;
 633
 634         netifd_log_message(L_NOTICE, "%s '%s' link is %s\n", dev->type->name, dev->ifname, state ? "up" : "down" );
 635
 636         dev->link_active = state;
 637         device_broadcast_event(dev, state ? DEV_EVENT_LINK_UP : DEV_EVENT_LINK_DOWN);
 638 }
 639
 640 void device_set_ifindex(struct device *dev, int ifindex)
 641 {
 642         if (dev->ifindex == ifindex)
 643                 return;
 644
 645         dev->ifindex = ifindex;
 646         device_broadcast_event(dev, DEV_EVENT_UPDATE_IFINDEX);
 647 }
 648
 649 int device_set_ifname(struct device *dev, const char *name)
 650 {
 651         int ret = 0;
 652
 653         if (!strcmp(dev->ifname, name))
 654                 return 0;
 655
 656         if (dev->avl.key)
 657                 avl_delete(&devices, &dev->avl);
 658
 659         strncpy(dev->ifname, name, IFNAMSIZ);
 660
 661         if (dev->avl.key)
 662                 ret = avl_insert(&devices, &dev->avl);
 663
 664         if (ret == 0)
 665                 device_broadcast_event(dev, DEV_EVENT_UPDATE_IFNAME);
 666
 667         return ret;
 668 }
 669
 670 static int device_refcount(struct device *dev)
 671 {
 672         struct list_head *list;
 673         int count = 0;
 674
 675         list_for_each(list, &dev->users.list)
 676                 count++;
 677
 678         list_for_each(list, &dev->aliases.list)
 679                 count++;
 680
 681         return count;
 682 }
 683
 684 static void
 685 __device_add_user(struct device_user *dep, struct device *dev)
 686 {
 687         struct safe_list *head;
 688
 689         dep->dev = dev;
 690
 691         if (dep->alias)
 692                 head = &dev->aliases;
 693         else
 694                 head = &dev->users;
 695
 696         safe_list_add(&dep->list, head);
 697         D(DEVICE, "Add user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
 698
 699         if (dep->cb && dev->present) {
 700                 dep->cb(dep, DEV_EVENT_ADD);
 701                 if (dev->active)
 702                         dep->cb(dep, DEV_EVENT_UP);
 703
 704                 if (dev->link_active)
 705                         dep->cb(dep, DEV_EVENT_LINK_UP);
 706         }
 707 }
 708
 709 void device_add_user(struct device_user *dep, struct device *dev)
 710 {
 711         if (dep->dev == dev)
 712                 return;
 713
 714         if (dep->dev)
 715                 device_remove_user(dep);
 716
 717         if (!dev)
 718                 return;
 719
 720         __device_add_user(dep, dev);
 721 }
 722
 723 void
 724 device_free(struct device *dev)
 725 {
 726         __devlock++;
 727         free(dev->config);
 728         device_cleanup(dev);
 729         dev->type->free(dev);
 730         __devlock--;
 731 }
 732
 733 static void
 734 __device_free_unused(struct device *dev)
 735 {
 736         if (!safe_list_empty(&dev->users) ||
 737                 !safe_list_empty(&dev->aliases) ||
 738             dev->current_config || __devlock)
 739                 return;
 740
 741         device_free(dev);
 742 }
 743
 744 void device_remove_user(struct device_user *dep)
 745 {
 746         struct device *dev = dep->dev;
 747
 748         if (!dep->dev)
 749                 return;
 750
 751         dep->hotplug = false;
 752         if (dep->claimed)
 753                 device_release(dep);
 754
 755         safe_list_del(&dep->list);
 756         dep->dev = NULL;
 757         D(DEVICE, "Remove user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
 758         __device_free_unused(dev);
 759 }
 760
 761 void
 762 device_free_unused(struct device *dev)
 763 {
 764         struct device *tmp;
 765
 766         if (dev)
 767                 return __device_free_unused(dev);
 768
 769         avl_for_each_element_safe(&devices, dev, avl, tmp)
 770                 __device_free_unused(dev);
 771 }
 772
 773 void
 774 device_init_pending(void)
 775 {
 776         struct device *dev, *tmp;
 777
 778         avl_for_each_element_safe(&devices, dev, avl, tmp) {
 779                 if (!dev->config_pending)
 780                         continue;
 781
 782                 dev->type->config_init(dev);
 783                 dev->config_pending = false;
 784         }
 785 }
 786
 787 static enum dev_change_type
 788 device_set_config(struct device *dev, struct device_type *type,
 789                   struct blob_attr *attr)
 790 {
 791         struct blob_attr *tb[__DEV_ATTR_MAX];
 792         const struct uci_blob_param_list *cfg = type->config_params;
 793
 794         if (type != dev->type)
 795                 return DEV_CONFIG_RECREATE;
 796
 797         if (dev->type->reload)
 798                 return dev->type->reload(dev, attr);
 799
 800         if (uci_blob_check_equal(dev->config, attr, cfg))
 801                 return DEV_CONFIG_NO_CHANGE;
 802
 803         if (cfg == &device_attr_list) {
 804                 memset(tb, 0, sizeof(tb));
 805
 806                 if (attr)
 807                         blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
 808                                 blob_data(attr), blob_len(attr));
 809
 810                 device_init_settings(dev, tb);
 811                 return DEV_CONFIG_RESTART;
 812         } else
 813                 return DEV_CONFIG_RECREATE;
 814 }
 815
 816 enum dev_change_type
 817 device_apply_config(struct device *dev, struct device_type *type,
 818                     struct blob_attr *config)
 819 {
 820         enum dev_change_type change;
 821
 822         change = device_set_config(dev, type, config);
 823         if (dev->external) {
 824                 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
 825                 change = DEV_CONFIG_APPLIED;
 826         }
 827
 828         switch (change) {
 829                 case DEV_CONFIG_RESTART:
 830                 case DEV_CONFIG_APPLIED:
 831                         D(DEVICE, "Device '%s': config applied\n", dev->ifname);
 832                         config = blob_memdup(config);
 833                         free(dev->config);
 834                         dev->config = config;
 835                         if (change == DEV_CONFIG_RESTART && dev->present) {
 836                                 int ret = 0;
 837
 838                                 device_set_present(dev, false);
 839                                 if (dev->active && !dev->external) {
 840                                         ret = dev->set_state(dev, false);
 841                                         if (!ret)
 842                                                 ret = dev->set_state(dev, true);
 843                                 }
 844                                 if (!ret)
 845                                         device_set_present(dev, true);
 846                         }
 847                         break;
 848                 case DEV_CONFIG_NO_CHANGE:
 849                         D(DEVICE, "Device '%s': no configuration change\n", dev->ifname);
 850                         break;
 851                 case DEV_CONFIG_RECREATE:
 852                         break;
 853         }
 854
 855         return change;
 856 }
 857
 858 static void
 859 device_replace(struct device *dev, struct device *odev)
 860 {
 861         struct device_user *dep, *tmp;
 862
 863         __devlock++;
 864         if (odev->present)
 865                 device_set_present(odev, false);
 866
 867         list_for_each_entry_safe(dep, tmp, &odev->users.list, list.list) {
 868                 device_release(dep);
 869                 safe_list_del(&dep->list);
 870                 __device_add_user(dep, dev);
 871         }
 872         __devlock--;
 873
 874         device_free(odev);
 875 }
 876
 877 void
 878 device_reset_config(void)
 879 {
 880         struct device *dev;
 881
 882         avl_for_each_element(&devices, dev, avl)
 883                 dev->current_config = false;
 884 }
 885
 886 void
 887 device_reset_old(void)
 888 {
 889         struct device *dev, *tmp, *ndev;
 890
 891         avl_for_each_element_safe(&devices, dev, avl, tmp) {
 892                 if (dev->current_config || dev->default_config)
 893                         continue;
 894
 895                 if (dev->type != &simple_device_type)
 896                         continue;
 897
 898                 ndev = device_create_default(dev->ifname, dev->external);
 899                 if (!ndev)
 900                         continue;
 901
 902                 device_replace(ndev, dev);
 903         }
 904 }
 905
 906 void
 907 device_set_default_ps(bool state)
 908 {
 909         struct device *dev;
 910
 911         if (state == default_ps)
 912                 return;
 913
 914         default_ps = state;
 915
 916         avl_for_each_element(&devices, dev, avl) {
 917                 struct device_settings *s = &dev->settings;
 918                 unsigned int apply_mask = 0;
 919
 920                 if (!(s->flags & DEV_OPT_RPS)) {
 921                         s->rps = default_ps;
 922                         apply_mask |= DEV_OPT_RPS;
 923                 }
 924
 925                 if (!(s->flags & DEV_OPT_XPS)) {
 926                         s->xps = default_ps;
 927                         apply_mask |= DEV_OPT_XPS;
 928                 }
 929
 930                 if (!apply_mask)
 931                         continue;
 932
 933                 if (!(dev->external || (dev->present && dev->active)) ||
 934                                 dev->config_pending)
 935                         continue;
 936
 937                 system_if_apply_settings(dev, s, apply_mask);
 938         }
 939 }
 940
 941 struct device *
 942 device_create(const char *name, struct device_type *type,
 943               struct blob_attr *config)
 944 {
 945         struct device *odev = NULL, *dev;
 946         enum dev_change_type change;
 947
 948         odev = device_find(name);
 949         if (odev) {
 950                 odev->current_config = true;
 951                 change = device_apply_config(odev, type, config);
 952                 switch (change) {
 953                 case DEV_CONFIG_RECREATE:
 954                         D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
 955                         device_delete(odev);
 956                         break;
 957                 default:
 958                         return odev;
 959                 }
 960         } else
 961                 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
 962
 963         config = blob_memdup(config);
 964         if (!config)
 965                 return NULL;
 966
 967         dev = type->create(name, type, config);
 968         if (!dev)
 969                 return NULL;
 970
 971         dev->current_config = true;
 972         dev->config = config;
 973         if (odev)
 974                 device_replace(dev, odev);
 975
 976         if (!config_init && dev->config_pending) {
 977                 type->config_init(dev);
 978                 dev->config_pending = false;
 979         }
 980
 981         return dev;
 982 }
 983
 984 void
 985 device_dump_status(struct blob_buf *b, struct device *dev)
 986 {
 987         struct device_settings st;
 988         void *c, *s;
 989
 990         if (!dev) {
 991                 avl_for_each_element(&devices, dev, avl) {
 992                         if (!dev->present)
 993                                 continue;
 994                         c = blobmsg_open_table(b, dev->ifname);
 995                         device_dump_status(b, dev);
 996                         blobmsg_close_table(b, c);
 997                 }
 998
 999                 return;
1000         }
1001
1002         blobmsg_add_u8(b, "external", dev->external);
1003         blobmsg_add_u8(b, "present", dev->present);
1004         blobmsg_add_string(b, "type", dev->type->name);
1005
1006         if (!dev->present)
1007                 return;
1008
1009         blobmsg_add_u8(b, "up", !!dev->active);
1010         blobmsg_add_u8(b, "carrier", !!dev->link_active);
1011
1012         if (dev->type->dump_info)
1013                 dev->type->dump_info(dev, b);
1014         else
1015                 system_if_dump_info(dev, b);
1016
1017         if (dev->active) {
1018                 device_merge_settings(dev, &st);
1019                 if (st.flags & DEV_OPT_MTU)
1020                         blobmsg_add_u32(b, "mtu", st.mtu);
1021                 if (st.flags & DEV_OPT_MTU6)
1022                         blobmsg_add_u32(b, "mtu6", st.mtu6);
1023                 if (st.flags & DEV_OPT_MACADDR)
1024                         blobmsg_add_string(b, "macaddr", format_macaddr(st.macaddr));
1025                 if (st.flags & DEV_OPT_TXQUEUELEN)
1026                         blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
1027                 if (st.flags & DEV_OPT_IPV6)
1028                         blobmsg_add_u8(b, "ipv6", st.ipv6);
1029                 if (st.flags & DEV_OPT_PROMISC)
1030                         blobmsg_add_u8(b, "promisc", st.promisc);
1031                 if (st.flags & DEV_OPT_RPFILTER)
1032                         blobmsg_add_u32(b, "rpfilter", st.rpfilter);
1033                 if (st.flags & DEV_OPT_ACCEPTLOCAL)
1034                         blobmsg_add_u8(b, "acceptlocal", st.acceptlocal);
1035                 if (st.flags & DEV_OPT_IGMPVERSION)
1036                         blobmsg_add_u32(b, "igmpversion", st.igmpversion);
1037                 if (st.flags & DEV_OPT_MLDVERSION)
1038                         blobmsg_add_u32(b, "mldversion", st.mldversion);
1039                 if (st.flags & DEV_OPT_NEIGHREACHABLETIME) {
1040                         blobmsg_add_u32(b, "neigh4reachabletime", st.neigh4reachabletime);
1041                         blobmsg_add_u32(b, "neigh6reachabletime", st.neigh6reachabletime);
1042                 }
1043                 if (st.flags & DEV_OPT_NEIGHGCSTALETIME) {
1044                         blobmsg_add_u32(b, "neigh4gcstaletime", st.neigh4gcstaletime);
1045                         blobmsg_add_u32(b, "neigh6gcstaletime", st.neigh6gcstaletime);
1046                 }
1047                 if (st.flags & DEV_OPT_DADTRANSMITS)
1048                         blobmsg_add_u32(b, "dadtransmits", st.dadtransmits);
1049                 if (st.flags & DEV_OPT_MULTICAST_TO_UNICAST)
1050                         blobmsg_add_u8(b, "multicast_to_unicast", st.multicast_to_unicast);
1051                 if (st.flags & DEV_OPT_MULTICAST_ROUTER)
1052                         blobmsg_add_u32(b, "multicast_router", st.multicast_router);
1053                 if (st.flags & DEV_OPT_MULTICAST_FAST_LEAVE)
1054                         blobmsg_add_u8(b, "multicast_fast_leave", st.multicast_fast_leave);
1055                 if (st.flags & DEV_OPT_MULTICAST)
1056                         blobmsg_add_u8(b, "multicast", st.multicast);
1057                 if (st.flags & DEV_OPT_LEARNING)
1058                         blobmsg_add_u8(b, "learning", st.learning);
1059                 if (st.flags & DEV_OPT_UNICAST_FLOOD)
1060                         blobmsg_add_u8(b, "unicast_flood", st.unicast_flood);
1061                 if (st.flags & DEV_OPT_SENDREDIRECTS)
1062                         blobmsg_add_u8(b, "sendredirects", st.sendredirects);
1063         }
1064
1065         s = blobmsg_open_table(b, "statistics");
1066         if (dev->type->dump_stats)
1067                 dev->type->dump_stats(dev, b);
1068         else
1069                 system_if_dump_stats(dev, b);
1070         blobmsg_close_table(b, s);
1071 }
1072
1073 static void __init simple_device_type_init(void)
1074 {
1075         device_type_add(&simple_device_type);
1076 }