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
  36 static const struct blobmsg_policy dev_attrs[__DEV_ATTR_MAX] = {
  37         [DEV_ATTR_TYPE] = { .name = "type", .type = BLOBMSG_TYPE_STRING },
  38         [DEV_ATTR_MTU] = { .name = "mtu", .type = BLOBMSG_TYPE_INT32 },
  39         [DEV_ATTR_MTU6] = { .name = "mtu6", .type = BLOBMSG_TYPE_INT32 },
  40         [DEV_ATTR_MACADDR] = { .name = "macaddr", .type = BLOBMSG_TYPE_STRING },
  41         [DEV_ATTR_TXQUEUELEN] = { .name = "txqueuelen", .type = BLOBMSG_TYPE_INT32 },
  42         [DEV_ATTR_ENABLED] = { .name = "enabled", .type = BLOBMSG_TYPE_BOOL },
  43         [DEV_ATTR_IPV6] = { .name = "ipv6", .type = BLOBMSG_TYPE_BOOL },
  44         [DEV_ATTR_PROMISC] = { .name = "promisc", .type = BLOBMSG_TYPE_BOOL },
  45         [DEV_ATTR_RPFILTER] = { .name = "rpfilter", .type = BLOBMSG_TYPE_STRING },
  46         [DEV_ATTR_ACCEPTLOCAL] = { .name = "acceptlocal", .type = BLOBMSG_TYPE_BOOL },
  47         [DEV_ATTR_IGMPVERSION] = { .name = "igmpversion", .type = BLOBMSG_TYPE_INT32 },
  48         [DEV_ATTR_MLDVERSION] = { .name = "mldversion", .type = BLOBMSG_TYPE_INT32 },
  49         [DEV_ATTR_NEIGHREACHABLETIME] = { .name = "neighreachabletime", .type = BLOBMSG_TYPE_INT32 },
  50         [DEV_ATTR_NEIGHGCSTALETIME] = { .name = "neighgcstaletime", .type = BLOBMSG_TYPE_INT32 },
  51         [DEV_ATTR_DADTRANSMITS] = { .name = "dadtransmits", .type = BLOBMSG_TYPE_INT32 },
  52         [DEV_ATTR_MULTICAST_TO_UNICAST] = { .name = "multicast_to_unicast", .type = BLOBMSG_TYPE_BOOL },
  53         [DEV_ATTR_MULTICAST_ROUTER] = { .name = "multicast_router", .type = BLOBMSG_TYPE_INT32 },
  54         [DEV_ATTR_MULTICAST_FAST_LEAVE] = { .name = "multicast_fast_leave", . type = BLOBMSG_TYPE_BOOL },
  55         [DEV_ATTR_MULTICAST] = { .name ="multicast", .type = BLOBMSG_TYPE_BOOL },
  56         [DEV_ATTR_LEARNING] = { .name ="learning", .type = BLOBMSG_TYPE_BOOL },
  57         [DEV_ATTR_UNICAST_FLOOD] = { .name ="unicast_flood", .type = BLOBMSG_TYPE_BOOL },
  58         [DEV_ATTR_SENDREDIRECTS] = { .name = "sendredirects", .type = BLOBMSG_TYPE_BOOL },
  59         [DEV_ATTR_NEIGHLOCKTIME] = { .name = "neighlocktime", .type = BLOBMSG_TYPE_INT32 },
  60 };
  61
  62 const struct uci_blob_param_list device_attr_list = {
  63         .n_params = __DEV_ATTR_MAX,
  64         .params = dev_attrs,
  65 };
  66
  67 static int __devlock = 0;
  68
  69 int device_type_add(struct device_type *devtype)
  70 {
  71         if (device_type_get(devtype->name)) {
  72                 netifd_log_message(L_WARNING, "Device handler '%s' already exists\n",
  73                                    devtype->name);
  74                 return 1;
  75         }
  76
  77         netifd_log_message(L_NOTICE, "Added device handler type: %s\n",
  78                 devtype->name);
  79
  80         list_add(&devtype->list, &devtypes);
  81         return 0;
  82 }
  83
  84 /* Retrieve the device type for the given name. If 'bridge' is true, the type
  85  * must have bridge capabilities
  86  */
  87 struct device_type *
  88 device_type_get(const char *tname)
  89 {
  90         struct device_type *cur;
  91
  92         list_for_each_entry(cur, &devtypes, list)
  93                 if (!strcmp(cur->name, tname))
  94                         return cur;
  95
  96         return NULL;
  97 }
  98
  99 void device_lock(void)
 100 {
 101         __devlock++;
 102 }
 103
 104 void device_unlock(void)
 105 {
 106         __devlock--;
 107         if (!__devlock)
 108                 device_free_unused(NULL);
 109 }
 110
 111 static int set_device_state(struct device *dev, bool state)
 112 {
 113         if (state) {
 114                 /* Get ifindex for all devices being enabled so a valid  */
 115                 /* ifindex is in place avoiding possible race conditions */
 116                 device_set_ifindex(dev, system_if_resolve(dev));
 117                 if (!dev->ifindex)
 118                         return -1;
 119
 120                 system_if_up(dev);
 121         }
 122         else
 123                 system_if_down(dev);
 124
 125         return 0;
 126 }
 127
 128 static int
 129 simple_device_set_state(struct device *dev, bool state)
 130 {
 131         struct device *pdev;
 132         int ret = 0;
 133
 134         pdev = dev->parent.dev;
 135         if (state && !pdev) {
 136                 pdev = system_if_get_parent(dev);
 137                 if (pdev)
 138                         device_add_user(&dev->parent, pdev);
 139         }
 140
 141         if (pdev) {
 142                 if (state)
 143                         ret = device_claim(&dev->parent);
 144                 else
 145                         device_release(&dev->parent);
 146
 147                 if (ret < 0)
 148                         return ret;
 149         }
 150         return set_device_state(dev, state);
 151 }
 152
 153 static struct device *
 154 simple_device_create(const char *name, struct device_type *devtype,
 155                      struct blob_attr *attr)
 156 {
 157         struct blob_attr *tb[__DEV_ATTR_MAX];
 158         struct device *dev = NULL;
 159
 160         /* device type is unused for simple devices */
 161         devtype = NULL;
 162
 163         blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb, blob_data(attr), blob_len(attr));
 164         dev = device_get(name, true);
 165         if (!dev)
 166                 return NULL;
 167
 168         dev->set_state = simple_device_set_state;
 169         device_init_settings(dev, tb);
 170
 171         return dev;
 172 }
 173
 174 static void simple_device_free(struct device *dev)
 175 {
 176         if (dev->parent.dev)
 177                 device_remove_user(&dev->parent);
 178         free(dev);
 179 }
 180
 181 struct device_type simple_device_type = {
 182         .name = "Network device",
 183         .config_params = &device_attr_list,
 184
 185         .create = simple_device_create,
 186         .check_state = system_if_check,
 187         .free = simple_device_free,
 188 };
 189
 190 void
 191 device_merge_settings(struct device *dev, struct device_settings *n)
 192 {
 193         struct device_settings *os = &dev->orig_settings;
 194         struct device_settings *s = &dev->settings;
 195
 196         memset(n, 0, sizeof(*n));
 197         n->mtu = s->flags & DEV_OPT_MTU ? s->mtu : os->mtu;
 198         n->mtu6 = s->flags & DEV_OPT_MTU6 ? s->mtu6 : os->mtu6;
 199         n->txqueuelen = s->flags & DEV_OPT_TXQUEUELEN ?
 200                 s->txqueuelen : os->txqueuelen;
 201         memcpy(n->macaddr,
 202                 (s->flags & DEV_OPT_MACADDR ? s->macaddr : os->macaddr),
 203                 sizeof(n->macaddr));
 204         n->ipv6 = s->flags & DEV_OPT_IPV6 ? s->ipv6 : os->ipv6;
 205         n->promisc = s->flags & DEV_OPT_PROMISC ? s->promisc : os->promisc;
 206         n->rpfilter = s->flags & DEV_OPT_RPFILTER ? s->rpfilter : os->rpfilter;
 207         n->acceptlocal = s->flags & DEV_OPT_ACCEPTLOCAL ? s->acceptlocal : os->acceptlocal;
 208         n->igmpversion = s->flags & DEV_OPT_IGMPVERSION ? s->igmpversion : os->igmpversion;
 209         n->mldversion = s->flags & DEV_OPT_MLDVERSION ? s->mldversion : os->mldversion;
 210         n->neigh4reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
 211                 s->neigh4reachabletime : os->neigh4reachabletime;
 212         n->neigh6reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
 213                 s->neigh6reachabletime : os->neigh6reachabletime;
 214         n->neigh4gcstaletime = s->flags & DEV_OPT_NEIGHGCSTALETIME ?
 215                 s->neigh4gcstaletime : os->neigh4gcstaletime;
 216         n->neigh6gcstaletime = s->flags & DEV_OPT_NEIGHGCSTALETIME ?
 217                 s->neigh6gcstaletime : os->neigh6gcstaletime;
 218         n->neigh4locktime = s->flags & DEV_OPT_NEIGHLOCKTIME ?
 219                 s->neigh4locktime : os->neigh4locktime;
 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_NEIGHLOCKTIME])) {
 318                 s->neigh4locktime = blobmsg_get_u32(cur);
 319                 s->flags |= DEV_OPT_NEIGHLOCKTIME;
 320         }
 321
 322         if ((cur = tb[DEV_ATTR_DADTRANSMITS])) {
 323                 s->dadtransmits = blobmsg_get_u32(cur);
 324                 s->flags |= DEV_OPT_DADTRANSMITS;
 325         }
 326
 327         if ((cur = tb[DEV_ATTR_MULTICAST_TO_UNICAST])) {
 328                 s->multicast_to_unicast = blobmsg_get_bool(cur);
 329                 s->flags |= DEV_OPT_MULTICAST_TO_UNICAST;
 330         }
 331
 332         if ((cur = tb[DEV_ATTR_MULTICAST_ROUTER])) {
 333                 s->multicast_router = blobmsg_get_u32(cur);
 334                 if (s->multicast_router <= 2)
 335                         s->flags |= DEV_OPT_MULTICAST_ROUTER;
 336                 else
 337                         DPRINTF("Invalid value: %d - (Use 0: never, 1: learn, 2: always)\n", blobmsg_get_u32(cur));
 338         }
 339
 340         if ((cur = tb[DEV_ATTR_MULTICAST_FAST_LEAVE])) {
 341                 s->multicast_fast_leave = blobmsg_get_bool(cur);
 342                 s->flags |= DEV_OPT_MULTICAST_FAST_LEAVE;
 343         }
 344
 345         if ((cur = tb[DEV_ATTR_MULTICAST])) {
 346                 s->multicast = blobmsg_get_bool(cur);
 347                 s->flags |= DEV_OPT_MULTICAST;
 348         }
 349
 350         if ((cur = tb[DEV_ATTR_LEARNING])) {
 351                 s->learning = blobmsg_get_bool(cur);
 352                 s->flags |= DEV_OPT_LEARNING;
 353         }
 354
 355         if ((cur = tb[DEV_ATTR_UNICAST_FLOOD])) {
 356                 s->unicast_flood = blobmsg_get_bool(cur);
 357                 s->flags |= DEV_OPT_UNICAST_FLOOD;
 358         }
 359
 360         if ((cur = tb[DEV_ATTR_SENDREDIRECTS])) {
 361                 s->sendredirects = blobmsg_get_bool(cur);
 362                 s->flags |= DEV_OPT_SENDREDIRECTS;
 363         }
 364
 365         device_set_disabled(dev, disabled);
 366 }
 367
 368 static void __init dev_init(void)
 369 {
 370         avl_init(&devices, avl_strcmp, true, NULL);
 371 }
 372
 373 static int device_broadcast_cb(void *ctx, struct safe_list *list)
 374 {
 375         struct device_user *dep = container_of(list, struct device_user, list);
 376         int *ev = ctx;
 377
 378         /* device might have been removed by an earlier callback */
 379         if (!dep->dev)
 380                 return 0;
 381
 382         if (dep->cb)
 383                 dep->cb(dep, *ev);
 384         return 0;
 385 }
 386
 387 void device_broadcast_event(struct device *dev, enum device_event ev)
 388 {
 389         int dev_ev = ev;
 390
 391         safe_list_for_each(&dev->aliases, device_broadcast_cb, &dev_ev);
 392         safe_list_for_each(&dev->users, device_broadcast_cb, &dev_ev);
 393 }
 394
 395 int device_claim(struct device_user *dep)
 396 {
 397         struct device *dev = dep->dev;
 398         int ret = 0;
 399
 400         if (dep->claimed)
 401                 return 0;
 402
 403         if (!dev)
 404                 return -1;
 405
 406         dep->claimed = true;
 407         D(DEVICE, "Claim %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active + 1);
 408         if (++dev->active != 1)
 409                 return 0;
 410
 411         device_broadcast_event(dev, DEV_EVENT_SETUP);
 412         if (dev->external) {
 413                 /* Get ifindex for external claimed devices so a valid   */
 414                 /* ifindex is in place avoiding possible race conditions */
 415                 device_set_ifindex(dev, system_if_resolve(dev));
 416                 if (!dev->ifindex)
 417                         ret = -1;
 418
 419                 system_if_get_settings(dev, &dev->orig_settings);
 420         } else
 421                 ret = dev->set_state(dev, true);
 422
 423         if (ret == 0)
 424                 device_broadcast_event(dev, DEV_EVENT_UP);
 425         else {
 426                 D(DEVICE, "claim %s %s failed: %d\n", dev->type->name, dev->ifname, ret);
 427                 dev->active = 0;
 428                 dep->claimed = false;
 429         }
 430
 431         return ret;
 432 }
 433
 434 void device_release(struct device_user *dep)
 435 {
 436         struct device *dev = dep->dev;
 437
 438         if (!dep->claimed)
 439                 return;
 440
 441         dep->claimed = false;
 442         dev->active--;
 443         D(DEVICE, "Release %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active);
 444         assert(dev->active >= 0);
 445
 446         if (dev->active)
 447                 return;
 448
 449         device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
 450         if (!dev->external)
 451                 dev->set_state(dev, false);
 452
 453         if (dev->active)
 454                 return;
 455
 456         device_broadcast_event(dev, DEV_EVENT_DOWN);
 457 }
 458
 459 int device_check_state(struct device *dev)
 460 {
 461         if (!dev->type->check_state)
 462                 return simple_device_type.check_state(dev);
 463
 464         return dev->type->check_state(dev);
 465 }
 466
 467 void device_init_virtual(struct device *dev, struct device_type *type, const char *name)
 468 {
 469         assert(dev);
 470         assert(type);
 471
 472         D(DEVICE, "Initialize device '%s'\n", name ? name : "");
 473         INIT_SAFE_LIST(&dev->users);
 474         INIT_SAFE_LIST(&dev->aliases);
 475         dev->type = type;
 476
 477         if (name)
 478                 device_set_ifname(dev, name);
 479
 480         if (!dev->set_state)
 481                 dev->set_state = set_device_state;
 482 }
 483
 484 int device_init(struct device *dev, struct device_type *type, const char *ifname)
 485 {
 486         int ret;
 487
 488         device_init_virtual(dev, type, ifname);
 489
 490         dev->avl.key = dev->ifname;
 491
 492         ret = avl_insert(&devices, &dev->avl);
 493         if (ret < 0)
 494                 return ret;
 495
 496         system_if_clear_state(dev);
 497         device_check_state(dev);
 498
 499         return 0;
 500 }
 501
 502 static struct device *
 503 device_create_default(const char *name, bool external)
 504 {
 505         struct device *dev;
 506
 507         if (!external && system_if_force_external(name))
 508                 return NULL;
 509
 510         D(DEVICE, "Create simple device '%s'\n", name);
 511         dev = calloc(1, sizeof(*dev));
 512         if (!dev)
 513                 return NULL;
 514
 515         dev->external = external;
 516         dev->set_state = simple_device_set_state;
 517         device_init(dev, &simple_device_type, name);
 518         dev->default_config = true;
 519         if (external)
 520                 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
 521         return dev;
 522 }
 523
 524 struct device *
 525 device_find(const char *name)
 526 {
 527         struct device *dev;
 528
 529         return avl_find_element(&devices, name, dev, avl);
 530 }
 531
 532 struct device *
 533 device_get(const char *name, int create)
 534 {
 535         struct device *dev;
 536
 537         if (strchr(name, '.'))
 538                 return get_vlan_device_chain(name, create);
 539
 540         if (name[0] == '@')
 541                 return device_alias_get(name + 1);
 542
 543         dev = avl_find_element(&devices, name, dev, avl);
 544         if (dev) {
 545                 if (create > 1 && !dev->external) {
 546                         system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
 547                         dev->external = true;
 548                         device_set_present(dev, true);
 549                 }
 550                 return dev;
 551         }
 552
 553         if (!create)
 554                 return NULL;
 555
 556         return device_create_default(name, create > 1);
 557 }
 558
 559 static void
 560 device_delete(struct device *dev)
 561 {
 562         if (!dev->avl.key)
 563                 return;
 564
 565         D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
 566         avl_delete(&devices, &dev->avl);
 567         dev->avl.key = NULL;
 568 }
 569
 570 static int device_cleanup_cb(void *ctx, struct safe_list *list)
 571 {
 572         struct device_user *dep = container_of(list, struct device_user, list);
 573         if (dep->cb)
 574                 dep->cb(dep, DEV_EVENT_REMOVE);
 575
 576         device_release(dep);
 577         return 0;
 578 }
 579
 580 void device_cleanup(struct device *dev)
 581 {
 582         D(DEVICE, "Clean up device '%s'\n", dev->ifname);
 583         safe_list_for_each(&dev->users, device_cleanup_cb, NULL);
 584         safe_list_for_each(&dev->aliases, device_cleanup_cb, NULL);
 585         device_delete(dev);
 586 }
 587
 588 static void __device_set_present(struct device *dev, bool state)
 589 {
 590         if (dev->present == state)
 591                 return;
 592
 593         dev->present = state;
 594         device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
 595 }
 596
 597 void
 598 device_refresh_present(struct device *dev)
 599 {
 600         bool state = dev->sys_present;
 601
 602         if (dev->disabled || dev->deferred)
 603                 state = false;
 604
 605         __device_set_present(dev, state);
 606 }
 607
 608 void device_set_present(struct device *dev, bool state)
 609 {
 610         if (dev->sys_present == state)
 611                 return;
 612
 613         D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
 614         dev->sys_present = state;
 615         device_refresh_present(dev);
 616 }
 617
 618 void device_set_link(struct device *dev, bool state)
 619 {
 620         if (dev->link_active == state)
 621                 return;
 622
 623         netifd_log_message(L_NOTICE, "%s '%s' link is %s\n", dev->type->name, dev->ifname, state ? "up" : "down" );
 624
 625         dev->link_active = state;
 626         device_broadcast_event(dev, state ? DEV_EVENT_LINK_UP : DEV_EVENT_LINK_DOWN);
 627 }
 628
 629 void device_set_ifindex(struct device *dev, int ifindex)
 630 {
 631         if (dev->ifindex == ifindex)
 632                 return;
 633
 634         dev->ifindex = ifindex;
 635         device_broadcast_event(dev, DEV_EVENT_UPDATE_IFINDEX);
 636 }
 637
 638 int device_set_ifname(struct device *dev, const char *name)
 639 {
 640         int ret = 0;
 641
 642         if (!strcmp(dev->ifname, name))
 643                 return 0;
 644
 645         if (dev->avl.key)
 646                 avl_delete(&devices, &dev->avl);
 647
 648         strncpy(dev->ifname, name, IFNAMSIZ);
 649
 650         if (dev->avl.key)
 651                 ret = avl_insert(&devices, &dev->avl);
 652
 653         if (ret == 0)
 654                 device_broadcast_event(dev, DEV_EVENT_UPDATE_IFNAME);
 655
 656         return ret;
 657 }
 658
 659 static int device_refcount(struct device *dev)
 660 {
 661         struct list_head *list;
 662         int count = 0;
 663
 664         list_for_each(list, &dev->users.list)
 665                 count++;
 666
 667         list_for_each(list, &dev->aliases.list)
 668                 count++;
 669
 670         return count;
 671 }
 672
 673 static void
 674 __device_add_user(struct device_user *dep, struct device *dev)
 675 {
 676         struct safe_list *head;
 677
 678         dep->dev = dev;
 679
 680         if (dep->alias)
 681                 head = &dev->aliases;
 682         else
 683                 head = &dev->users;
 684
 685         safe_list_add(&dep->list, head);
 686         D(DEVICE, "Add user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
 687
 688         if (dep->cb && dev->present) {
 689                 dep->cb(dep, DEV_EVENT_ADD);
 690                 if (dev->active)
 691                         dep->cb(dep, DEV_EVENT_UP);
 692
 693                 if (dev->link_active)
 694                         dep->cb(dep, DEV_EVENT_LINK_UP);
 695         }
 696 }
 697
 698 void device_add_user(struct device_user *dep, struct device *dev)
 699 {
 700         if (dep->dev == dev)
 701                 return;
 702
 703         if (dep->dev)
 704                 device_remove_user(dep);
 705
 706         if (!dev)
 707                 return;
 708
 709         __device_add_user(dep, dev);
 710 }
 711
 712 void
 713 device_free(struct device *dev)
 714 {
 715         __devlock++;
 716         free(dev->config);
 717         device_cleanup(dev);
 718         dev->type->free(dev);
 719         __devlock--;
 720 }
 721
 722 static void
 723 __device_free_unused(struct device *dev)
 724 {
 725         if (!safe_list_empty(&dev->users) ||
 726                 !safe_list_empty(&dev->aliases) ||
 727             dev->current_config || __devlock)
 728                 return;
 729
 730         device_free(dev);
 731 }
 732
 733 void device_remove_user(struct device_user *dep)
 734 {
 735         struct device *dev = dep->dev;
 736
 737         if (!dep->dev)
 738                 return;
 739
 740         dep->hotplug = false;
 741         if (dep->claimed)
 742                 device_release(dep);
 743
 744         safe_list_del(&dep->list);
 745         dep->dev = NULL;
 746         D(DEVICE, "Remove user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
 747         __device_free_unused(dev);
 748 }
 749
 750 void
 751 device_free_unused(struct device *dev)
 752 {
 753         struct device *tmp;
 754
 755         if (dev)
 756                 return __device_free_unused(dev);
 757
 758         avl_for_each_element_safe(&devices, dev, avl, tmp)
 759                 __device_free_unused(dev);
 760 }
 761
 762 void
 763 device_init_pending(void)
 764 {
 765         struct device *dev, *tmp;
 766
 767         avl_for_each_element_safe(&devices, dev, avl, tmp) {
 768                 if (!dev->config_pending)
 769                         continue;
 770
 771                 dev->type->config_init(dev);
 772                 dev->config_pending = false;
 773         }
 774 }
 775
 776 static enum dev_change_type
 777 device_set_config(struct device *dev, struct device_type *type,
 778                   struct blob_attr *attr)
 779 {
 780         struct blob_attr *tb[__DEV_ATTR_MAX];
 781         const struct uci_blob_param_list *cfg = type->config_params;
 782
 783         if (type != dev->type)
 784                 return DEV_CONFIG_RECREATE;
 785
 786         if (dev->type->reload)
 787                 return dev->type->reload(dev, attr);
 788
 789         if (uci_blob_check_equal(dev->config, attr, cfg))
 790                 return DEV_CONFIG_NO_CHANGE;
 791
 792         if (cfg == &device_attr_list) {
 793                 memset(tb, 0, sizeof(tb));
 794
 795                 if (attr)
 796                         blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
 797                                 blob_data(attr), blob_len(attr));
 798
 799                 device_init_settings(dev, tb);
 800                 return DEV_CONFIG_RESTART;
 801         } else
 802                 return DEV_CONFIG_RECREATE;
 803 }
 804
 805 enum dev_change_type
 806 device_apply_config(struct device *dev, struct device_type *type,
 807                     struct blob_attr *config)
 808 {
 809         enum dev_change_type change;
 810
 811         change = device_set_config(dev, type, config);
 812         if (dev->external) {
 813                 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
 814                 change = DEV_CONFIG_APPLIED;
 815         }
 816
 817         switch (change) {
 818                 case DEV_CONFIG_RESTART:
 819                 case DEV_CONFIG_APPLIED:
 820                         D(DEVICE, "Device '%s': config applied\n", dev->ifname);
 821                         config = blob_memdup(config);
 822                         free(dev->config);
 823                         dev->config = config;
 824                         if (change == DEV_CONFIG_RESTART && dev->present) {
 825                                 int ret = 0;
 826
 827                                 device_set_present(dev, false);
 828                                 if (dev->active && !dev->external) {
 829                                         ret = dev->set_state(dev, false);
 830                                         if (!ret)
 831                                                 ret = dev->set_state(dev, true);
 832                                 }
 833                                 if (!ret)
 834                                         device_set_present(dev, true);
 835                         }
 836                         break;
 837                 case DEV_CONFIG_NO_CHANGE:
 838                         D(DEVICE, "Device '%s': no configuration change\n", dev->ifname);
 839                         break;
 840                 case DEV_CONFIG_RECREATE:
 841                         break;
 842         }
 843
 844         return change;
 845 }
 846
 847 static void
 848 device_replace(struct device *dev, struct device *odev)
 849 {
 850         struct device_user *dep, *tmp;
 851
 852         __devlock++;
 853         if (odev->present)
 854                 device_set_present(odev, false);
 855
 856         list_for_each_entry_safe(dep, tmp, &odev->users.list, list.list) {
 857                 device_release(dep);
 858                 safe_list_del(&dep->list);
 859                 __device_add_user(dep, dev);
 860         }
 861         __devlock--;
 862
 863         device_free(odev);
 864 }
 865
 866 void
 867 device_reset_config(void)
 868 {
 869         struct device *dev;
 870
 871         avl_for_each_element(&devices, dev, avl)
 872                 dev->current_config = false;
 873 }
 874
 875 void
 876 device_reset_old(void)
 877 {
 878         struct device *dev, *tmp, *ndev;
 879
 880         avl_for_each_element_safe(&devices, dev, avl, tmp) {
 881                 if (dev->current_config || dev->default_config)
 882                         continue;
 883
 884                 if (dev->type != &simple_device_type)
 885                         continue;
 886
 887                 ndev = device_create_default(dev->ifname, dev->external);
 888                 if (!ndev)
 889                         continue;
 890
 891                 device_replace(ndev, dev);
 892         }
 893 }
 894
 895 struct device *
 896 device_create(const char *name, struct device_type *type,
 897               struct blob_attr *config)
 898 {
 899         struct device *odev = NULL, *dev;
 900         enum dev_change_type change;
 901
 902         odev = device_find(name);
 903         if (odev) {
 904                 odev->current_config = true;
 905                 change = device_apply_config(odev, type, config);
 906                 switch (change) {
 907                 case DEV_CONFIG_RECREATE:
 908                         D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
 909                         device_delete(odev);
 910                         break;
 911                 default:
 912                         return odev;
 913                 }
 914         } else
 915                 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
 916
 917         config = blob_memdup(config);
 918         if (!config)
 919                 return NULL;
 920
 921         dev = type->create(name, type, config);
 922         if (!dev)
 923                 return NULL;
 924
 925         dev->current_config = true;
 926         dev->config = config;
 927         if (odev)
 928                 device_replace(dev, odev);
 929
 930         if (!config_init && dev->config_pending) {
 931                 type->config_init(dev);
 932                 dev->config_pending = false;
 933         }
 934
 935         return dev;
 936 }
 937
 938 void
 939 device_dump_status(struct blob_buf *b, struct device *dev)
 940 {
 941         struct device_settings st;
 942         void *c, *s;
 943
 944         if (!dev) {
 945                 avl_for_each_element(&devices, dev, avl) {
 946                         if (!dev->present)
 947                                 continue;
 948                         c = blobmsg_open_table(b, dev->ifname);
 949                         device_dump_status(b, dev);
 950                         blobmsg_close_table(b, c);
 951                 }
 952
 953                 return;
 954         }
 955
 956         blobmsg_add_u8(b, "external", dev->external);
 957         blobmsg_add_u8(b, "present", dev->present);
 958         blobmsg_add_string(b, "type", dev->type->name);
 959
 960         if (!dev->present)
 961                 return;
 962
 963         blobmsg_add_u8(b, "up", !!dev->active);
 964         blobmsg_add_u8(b, "carrier", !!dev->link_active);
 965
 966         if (dev->type->dump_info)
 967                 dev->type->dump_info(dev, b);
 968         else
 969                 system_if_dump_info(dev, b);
 970
 971         if (dev->active) {
 972                 device_merge_settings(dev, &st);
 973                 if (st.flags & DEV_OPT_MTU)
 974                         blobmsg_add_u32(b, "mtu", st.mtu);
 975                 if (st.flags & DEV_OPT_MTU6)
 976                         blobmsg_add_u32(b, "mtu6", st.mtu6);
 977                 if (st.flags & DEV_OPT_MACADDR)
 978                         blobmsg_add_string(b, "macaddr", format_macaddr(st.macaddr));
 979                 if (st.flags & DEV_OPT_TXQUEUELEN)
 980                         blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
 981                 if (st.flags & DEV_OPT_IPV6)
 982                         blobmsg_add_u8(b, "ipv6", st.ipv6);
 983                 if (st.flags & DEV_OPT_PROMISC)
 984                         blobmsg_add_u8(b, "promisc", st.promisc);
 985                 if (st.flags & DEV_OPT_RPFILTER)
 986                         blobmsg_add_u32(b, "rpfilter", st.rpfilter);
 987                 if (st.flags & DEV_OPT_ACCEPTLOCAL)
 988                         blobmsg_add_u8(b, "acceptlocal", st.acceptlocal);
 989                 if (st.flags & DEV_OPT_IGMPVERSION)
 990                         blobmsg_add_u32(b, "igmpversion", st.igmpversion);
 991                 if (st.flags & DEV_OPT_MLDVERSION)
 992                         blobmsg_add_u32(b, "mldversion", st.mldversion);
 993                 if (st.flags & DEV_OPT_NEIGHREACHABLETIME) {
 994                         blobmsg_add_u32(b, "neigh4reachabletime", st.neigh4reachabletime);
 995                         blobmsg_add_u32(b, "neigh6reachabletime", st.neigh6reachabletime);
 996                 }
 997                 if (st.flags & DEV_OPT_NEIGHGCSTALETIME) {
 998                         blobmsg_add_u32(b, "neigh4gcstaletime", st.neigh4gcstaletime);
 999                         blobmsg_add_u32(b, "neigh6gcstaletime", st.neigh6gcstaletime);
1000                 }
1001                 if (st.flags & DEV_OPT_NEIGHLOCKTIME)
1002                         blobmsg_add_u32(b, "neigh4locktime", st.neigh4locktime);
1003                 if (st.flags & DEV_OPT_DADTRANSMITS)
1004                         blobmsg_add_u32(b, "dadtransmits", st.dadtransmits);
1005                 if (st.flags & DEV_OPT_MULTICAST_TO_UNICAST)
1006                         blobmsg_add_u8(b, "multicast_to_unicast", st.multicast_to_unicast);
1007                 if (st.flags & DEV_OPT_MULTICAST_ROUTER)
1008                         blobmsg_add_u32(b, "multicast_router", st.multicast_router);
1009                 if (st.flags & DEV_OPT_MULTICAST_FAST_LEAVE)
1010                         blobmsg_add_u8(b, "multicast_fast_leave", st.multicast_fast_leave);
1011                 if (st.flags & DEV_OPT_MULTICAST)
1012                         blobmsg_add_u8(b, "multicast", st.multicast);
1013                 if (st.flags & DEV_OPT_LEARNING)
1014                         blobmsg_add_u8(b, "learning", st.learning);
1015                 if (st.flags & DEV_OPT_UNICAST_FLOOD)
1016                         blobmsg_add_u8(b, "unicast_flood", st.unicast_flood);
1017                 if (st.flags & DEV_OPT_SENDREDIRECTS)
1018                         blobmsg_add_u8(b, "sendredirects", st.sendredirects);
1019         }
1020
1021         s = blobmsg_open_table(b, "statistics");
1022         if (dev->type->dump_stats)
1023                 dev->type->dump_stats(dev, b);
1024         else
1025                 system_if_dump_stats(dev, b);
1026         blobmsg_close_table(b, s);
1027 }
1028
1029 static void __init simple_device_type_init(void)
1030 {
1031         device_type_add(&simple_device_type);
1032 }