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