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         [DEV_ATTR_NEIGHLOCKTIME] = { .name = "neighlocktime", .type = BLOBMSG_TYPE_INT32 },
  63 };
  64
  65 const struct uci_blob_param_list device_attr_list = {
  66         .n_params = __DEV_ATTR_MAX,
  67         .params = dev_attrs,
  68 };
  69
  70 static int __devlock = 0;
  71
  72 int device_type_add(struct device_type *devtype)
  73 {
  74         if (device_type_get(devtype->name)) {
  75                 netifd_log_message(L_WARNING, "Device handler '%s' already exists\n",
  76                                    devtype->name);
  77                 return 1;
  78         }
  79
  80         netifd_log_message(L_NOTICE, "Added device handler type: %s\n",
  81                 devtype->name);
  82
  83         list_add(&devtype->list, &devtypes);
  84         return 0;
  85 }
  86
  87 /* Retrieve the device type for the given name. If 'bridge' is true, the type
  88  * must have bridge capabilities
  89  */
  90 struct device_type *
  91 device_type_get(const char *tname)
  92 {
  93         struct device_type *cur;
  94
  95         list_for_each_entry(cur, &devtypes, list)
  96                 if (!strcmp(cur->name, tname))
  97                         return cur;
  98
  99         return NULL;
 100 }
 101
 102 void device_lock(void)
 103 {
 104         __devlock++;
 105 }
 106
 107 void device_unlock(void)
 108 {
 109         __devlock--;
 110         if (!__devlock)
 111                 device_free_unused(NULL);
 112 }
 113
 114 static int set_device_state(struct device *dev, bool state)
 115 {
 116         if (state) {
 117                 /* Get ifindex for all devices being enabled so a valid  */
 118                 /* ifindex is in place avoiding possible race conditions */
 119                 device_set_ifindex(dev, system_if_resolve(dev));
 120                 if (!dev->ifindex)
 121                         return -1;
 122
 123                 system_if_up(dev);
 124         }
 125         else
 126                 system_if_down(dev);
 127
 128         return 0;
 129 }
 130
 131 static int
 132 simple_device_set_state(struct device *dev, bool state)
 133 {
 134         struct device *pdev;
 135         int ret = 0;
 136
 137         pdev = dev->parent.dev;
 138         if (state && !pdev) {
 139                 pdev = system_if_get_parent(dev);
 140                 if (pdev)
 141                         device_add_user(&dev->parent, pdev);
 142         }
 143
 144         if (pdev) {
 145                 if (state)
 146                         ret = device_claim(&dev->parent);
 147                 else
 148                         device_release(&dev->parent);
 149
 150                 if (ret < 0)
 151                         return ret;
 152         }
 153         return set_device_state(dev, state);
 154 }
 155
 156 static struct device *
 157 simple_device_create(const char *name, struct device_type *devtype,
 158                      struct blob_attr *attr)
 159 {
 160         struct blob_attr *tb[__DEV_ATTR_MAX];
 161         struct device *dev = NULL;
 162
 163         /* device type is unused for simple devices */
 164         devtype = NULL;
 165
 166         blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb, blob_data(attr), blob_len(attr));
 167         dev = device_get(name, true);
 168         if (!dev)
 169                 return NULL;
 170
 171         dev->set_state = simple_device_set_state;
 172         device_init_settings(dev, tb);
 173
 174         return dev;
 175 }
 176
 177 static void simple_device_free(struct device *dev)
 178 {
 179         if (dev->parent.dev)
 180                 device_remove_user(&dev->parent);
 181         free(dev);
 182 }
 183
 184 struct device_type simple_device_type = {
 185         .name = "Network device",
 186         .config_params = &device_attr_list,
 187
 188         .create = simple_device_create,
 189         .check_state = system_if_check,
 190         .free = simple_device_free,
 191 };
 192
 193 static void
 194 device_merge_settings(struct device *dev, struct device_settings *n)
 195 {
 196         struct device_settings *os = &dev->orig_settings;
 197         struct device_settings *s = &dev->settings;
 198
 199         memset(n, 0, sizeof(*n));
 200         n->mtu = s->flags & DEV_OPT_MTU ? s->mtu : os->mtu;
 201         n->mtu6 = s->flags & DEV_OPT_MTU6 ? s->mtu6 : os->mtu6;
 202         n->txqueuelen = s->flags & DEV_OPT_TXQUEUELEN ?
 203                 s->txqueuelen : os->txqueuelen;
 204         memcpy(n->macaddr,
 205                 (s->flags & DEV_OPT_MACADDR ? s->macaddr : os->macaddr),
 206                 sizeof(n->macaddr));
 207         n->ipv6 = s->flags & DEV_OPT_IPV6 ? s->ipv6 : os->ipv6;
 208         n->promisc = s->flags & DEV_OPT_PROMISC ? s->promisc : os->promisc;
 209         n->rpfilter = s->flags & DEV_OPT_RPFILTER ? s->rpfilter : os->rpfilter;
 210         n->acceptlocal = s->flags & DEV_OPT_ACCEPTLOCAL ? s->acceptlocal : os->acceptlocal;
 211         n->igmpversion = s->flags & DEV_OPT_IGMPVERSION ? s->igmpversion : os->igmpversion;
 212         n->mldversion = s->flags & DEV_OPT_MLDVERSION ? s->mldversion : os->mldversion;
 213         n->neigh4reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
 214                 s->neigh4reachabletime : os->neigh4reachabletime;
 215         n->neigh6reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
 216                 s->neigh6reachabletime : os->neigh6reachabletime;
 217         n->neigh4gcstaletime = s->flags & DEV_OPT_NEIGHGCSTALETIME ?
 218                 s->neigh4gcstaletime : os->neigh4gcstaletime;
 219         n->neigh6gcstaletime = s->flags & DEV_OPT_NEIGHGCSTALETIME ?
 220                 s->neigh6gcstaletime : os->neigh6gcstaletime;
 221         n->neigh4locktime = s->flags & DEV_OPT_NEIGHLOCKTIME ?
 222                 s->neigh4locktime : os->neigh4locktime;
 223         n->dadtransmits = s->flags & DEV_OPT_DADTRANSMITS ?
 224                 s->dadtransmits : os->dadtransmits;
 225         n->multicast = s->flags & DEV_OPT_MULTICAST ?
 226                 s->multicast : os->multicast;
 227         n->multicast_to_unicast = s->multicast_to_unicast;
 228         n->multicast_router = s->multicast_router;
 229         n->multicast_fast_leave = s->multicast_fast_leave;
 230         n->learning = s->learning;
 231         n->unicast_flood = s->unicast_flood;
 232         n->sendredirects = s->flags & DEV_OPT_SENDREDIRECTS ?
 233                 s->sendredirects : os->sendredirects;
 234         n->flags = s->flags | os->flags | os->valid_flags;
 235 }
 236
 237 void
 238 device_init_settings(struct device *dev, struct blob_attr **tb)
 239 {
 240         struct device_settings *s = &dev->settings;
 241         struct blob_attr *cur;
 242         struct ether_addr *ea;
 243         bool disabled = false;
 244
 245         s->flags = 0;
 246         if ((cur = tb[DEV_ATTR_ENABLED]))
 247                 disabled = !blobmsg_get_bool(cur);
 248
 249         if ((cur = tb[DEV_ATTR_MTU]) && blobmsg_get_u32(cur) >= 68) {
 250                 s->mtu = blobmsg_get_u32(cur);
 251                 s->flags |= DEV_OPT_MTU;
 252         }
 253
 254         if ((cur = tb[DEV_ATTR_MTU6]) && blobmsg_get_u32(cur) >= 1280) {
 255                 s->mtu6 = blobmsg_get_u32(cur);
 256                 s->flags |= DEV_OPT_MTU6;
 257         }
 258
 259         if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
 260                 s->txqueuelen = blobmsg_get_u32(cur);
 261                 s->flags |= DEV_OPT_TXQUEUELEN;
 262         }
 263
 264         if ((cur = tb[DEV_ATTR_MACADDR])) {
 265                 ea = ether_aton(blobmsg_data(cur));
 266                 if (ea) {
 267                         memcpy(s->macaddr, ea, 6);
 268                         s->flags |= DEV_OPT_MACADDR;
 269                 }
 270         }
 271
 272         if ((cur = tb[DEV_ATTR_IPV6])) {
 273                 s->ipv6 = blobmsg_get_bool(cur);
 274                 s->flags |= DEV_OPT_IPV6;
 275         }
 276
 277         if ((cur = tb[DEV_ATTR_PROMISC])) {
 278                 s->promisc = blobmsg_get_bool(cur);
 279                 s->flags |= DEV_OPT_PROMISC;
 280         }
 281
 282         if ((cur = tb[DEV_ATTR_RPFILTER])) {
 283                 if (system_resolve_rpfilter(blobmsg_data(cur), &s->rpfilter))
 284                         s->flags |= DEV_OPT_RPFILTER;
 285                 else
 286                         DPRINTF("Failed to resolve rpfilter: %s\n", (char *) blobmsg_data(cur));
 287         }
 288
 289         if ((cur = tb[DEV_ATTR_ACCEPTLOCAL])) {
 290                 s->acceptlocal = blobmsg_get_bool(cur);
 291                 s->flags |= DEV_OPT_ACCEPTLOCAL;
 292         }
 293
 294         if ((cur = tb[DEV_ATTR_IGMPVERSION])) {
 295                 s->igmpversion = blobmsg_get_u32(cur);
 296                 if (s->igmpversion >= 1 && s->igmpversion <= 3)
 297                         s->flags |= DEV_OPT_IGMPVERSION;
 298                 else
 299                         DPRINTF("Failed to resolve igmpversion: %d\n", blobmsg_get_u32(cur));
 300         }
 301
 302         if ((cur = tb[DEV_ATTR_MLDVERSION])) {
 303                 s->mldversion = blobmsg_get_u32(cur);
 304                 if (s->mldversion >= 1 && s->mldversion <= 2)
 305                         s->flags |= DEV_OPT_MLDVERSION;
 306                 else
 307                         DPRINTF("Failed to resolve mldversion: %d\n", blobmsg_get_u32(cur));
 308         }
 309
 310         if ((cur = tb[DEV_ATTR_NEIGHREACHABLETIME])) {
 311                 s->neigh6reachabletime = s->neigh4reachabletime = blobmsg_get_u32(cur);
 312                 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
 313         }
 314
 315         if ((cur = tb[DEV_ATTR_NEIGHGCSTALETIME])) {
 316                 s->neigh6gcstaletime = s->neigh4gcstaletime = blobmsg_get_u32(cur);
 317                 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
 318         }
 319
 320         if ((cur = tb[DEV_ATTR_NEIGHLOCKTIME])) {
 321                 s->neigh4locktime = blobmsg_get_u32(cur);
 322                 s->flags |= DEV_OPT_NEIGHLOCKTIME;
 323         }
 324
 325         if ((cur = tb[DEV_ATTR_RPS])) {
 326                 s->rps = blobmsg_get_bool(cur);
 327                 s->flags |= DEV_OPT_RPS;
 328         }
 329         else
 330                 s->rps = default_ps;
 331
 332         if ((cur = tb[DEV_ATTR_XPS])) {
 333                 s->xps = blobmsg_get_bool(cur);
 334                 s->flags |= DEV_OPT_XPS;
 335         }
 336         else
 337                 s->xps = default_ps;
 338
 339         if ((cur = tb[DEV_ATTR_DADTRANSMITS])) {
 340                 s->dadtransmits = blobmsg_get_u32(cur);
 341                 s->flags |= DEV_OPT_DADTRANSMITS;
 342         }
 343
 344         if ((cur = tb[DEV_ATTR_MULTICAST_TO_UNICAST])) {
 345                 s->multicast_to_unicast = blobmsg_get_bool(cur);
 346                 s->flags |= DEV_OPT_MULTICAST_TO_UNICAST;
 347         }
 348
 349         if ((cur = tb[DEV_ATTR_MULTICAST_ROUTER])) {
 350                 s->multicast_router = blobmsg_get_u32(cur);
 351                 if (s->multicast_router <= 2)
 352                         s->flags |= DEV_OPT_MULTICAST_ROUTER;
 353                 else
 354                         DPRINTF("Invalid value: %d - (Use 0: never, 1: learn, 2: always)\n", blobmsg_get_u32(cur));
 355         }
 356
 357         if ((cur = tb[DEV_ATTR_MULTICAST_FAST_LEAVE])) {
 358                 s->multicast_fast_leave = blobmsg_get_bool(cur);
 359                 s->flags |= DEV_OPT_MULTICAST_FAST_LEAVE;
 360         }
 361
 362         if ((cur = tb[DEV_ATTR_MULTICAST])) {
 363                 s->multicast = blobmsg_get_bool(cur);
 364                 s->flags |= DEV_OPT_MULTICAST;
 365         }
 366
 367         if ((cur = tb[DEV_ATTR_LEARNING])) {
 368                 s->learning = blobmsg_get_bool(cur);
 369                 s->flags |= DEV_OPT_LEARNING;
 370         }
 371
 372         if ((cur = tb[DEV_ATTR_UNICAST_FLOOD])) {
 373                 s->unicast_flood = blobmsg_get_bool(cur);
 374                 s->flags |= DEV_OPT_UNICAST_FLOOD;
 375         }
 376
 377         if ((cur = tb[DEV_ATTR_SENDREDIRECTS])) {
 378                 s->sendredirects = blobmsg_get_bool(cur);
 379                 s->flags |= DEV_OPT_SENDREDIRECTS;
 380         }
 381
 382         device_set_disabled(dev, disabled);
 383 }
 384
 385 static void __init dev_init(void)
 386 {
 387         avl_init(&devices, avl_strcmp, true, NULL);
 388 }
 389
 390 static int device_broadcast_cb(void *ctx, struct safe_list *list)
 391 {
 392         struct device_user *dep = container_of(list, struct device_user, list);
 393         int *ev = ctx;
 394
 395         /* device might have been removed by an earlier callback */
 396         if (!dep->dev)
 397                 return 0;
 398
 399         if (dep->cb)
 400                 dep->cb(dep, *ev);
 401         return 0;
 402 }
 403
 404 void device_broadcast_event(struct device *dev, enum device_event ev)
 405 {
 406         int dev_ev = ev;
 407
 408         safe_list_for_each(&dev->aliases, device_broadcast_cb, &dev_ev);
 409         safe_list_for_each(&dev->users, device_broadcast_cb, &dev_ev);
 410 }
 411
 412 int device_claim(struct device_user *dep)
 413 {
 414         struct device *dev = dep->dev;
 415         int ret = 0;
 416
 417         if (dep->claimed)
 418                 return 0;
 419
 420         if (!dev)
 421                 return -1;
 422
 423         dep->claimed = true;
 424         D(DEVICE, "Claim %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active + 1);
 425         if (++dev->active != 1)
 426                 return 0;
 427
 428         device_broadcast_event(dev, DEV_EVENT_SETUP);
 429         if (dev->external) {
 430                 /* Get ifindex for external claimed devices so a valid   */
 431                 /* ifindex is in place avoiding possible race conditions */
 432                 device_set_ifindex(dev, system_if_resolve(dev));
 433                 if (!dev->ifindex)
 434                         ret = -1;
 435
 436                 system_if_get_settings(dev, &dev->orig_settings);
 437         } else
 438                 ret = dev->set_state(dev, true);
 439
 440         if (ret == 0)
 441                 device_broadcast_event(dev, DEV_EVENT_UP);
 442         else {
 443                 D(DEVICE, "claim %s %s failed: %d\n", dev->type->name, dev->ifname, ret);
 444                 dev->active = 0;
 445                 dep->claimed = false;
 446         }
 447
 448         return ret;
 449 }
 450
 451 void device_release(struct device_user *dep)
 452 {
 453         struct device *dev = dep->dev;
 454
 455         if (!dep->claimed)
 456                 return;
 457
 458         dep->claimed = false;
 459         dev->active--;
 460         D(DEVICE, "Release %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active);
 461         assert(dev->active >= 0);
 462
 463         if (dev->active)
 464                 return;
 465
 466         device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
 467         if (!dev->external)
 468                 dev->set_state(dev, false);
 469
 470         if (dev->active)
 471                 return;
 472
 473         device_broadcast_event(dev, DEV_EVENT_DOWN);
 474 }
 475
 476 int device_check_state(struct device *dev)
 477 {
 478         if (!dev->type->check_state)
 479                 return simple_device_type.check_state(dev);
 480
 481         return dev->type->check_state(dev);
 482 }
 483
 484 void device_init_virtual(struct device *dev, struct device_type *type, const char *name)
 485 {
 486         assert(dev);
 487         assert(type);
 488
 489         D(DEVICE, "Initialize device '%s'\n", name ? name : "");
 490         INIT_SAFE_LIST(&dev->users);
 491         INIT_SAFE_LIST(&dev->aliases);
 492         dev->type = type;
 493
 494         if (name)
 495                 device_set_ifname(dev, name);
 496
 497         if (!dev->set_state)
 498                 dev->set_state = set_device_state;
 499 }
 500
 501 int device_init(struct device *dev, struct device_type *type, const char *ifname)
 502 {
 503         int ret;
 504
 505         device_init_virtual(dev, type, ifname);
 506
 507         dev->avl.key = dev->ifname;
 508
 509         ret = avl_insert(&devices, &dev->avl);
 510         if (ret < 0)
 511                 return ret;
 512
 513         system_if_clear_state(dev);
 514         device_check_state(dev);
 515         dev->settings.rps = default_ps;
 516         dev->settings.xps = default_ps;
 517
 518         return 0;
 519 }
 520
 521 static struct device *
 522 device_create_default(const char *name, bool external)
 523 {
 524         struct device *dev;
 525
 526         if (!external && system_if_force_external(name))
 527                 return NULL;
 528
 529         D(DEVICE, "Create simple device '%s'\n", name);
 530         dev = calloc(1, sizeof(*dev));
 531         if (!dev)
 532                 return NULL;
 533
 534         dev->external = external;
 535         dev->set_state = simple_device_set_state;
 536         device_init(dev, &simple_device_type, name);
 537         dev->default_config = true;
 538         if (external)
 539                 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
 540         return dev;
 541 }
 542
 543 struct device *
 544 device_find(const char *name)
 545 {
 546         struct device *dev;
 547
 548         return avl_find_element(&devices, name, dev, avl);
 549 }
 550
 551 struct device *
 552 device_get(const char *name, int create)
 553 {
 554         struct device *dev;
 555
 556         if (strchr(name, '.'))
 557                 return get_vlan_device_chain(name, create);
 558
 559         if (name[0] == '@')
 560                 return device_alias_get(name + 1);
 561
 562         dev = avl_find_element(&devices, name, dev, avl);
 563         if (dev) {
 564                 if (create > 1 && !dev->external) {
 565                         system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
 566                         dev->external = true;
 567                         device_set_present(dev, true);
 568                 }
 569                 return dev;
 570         }
 571
 572         if (!create)
 573                 return NULL;
 574
 575         return device_create_default(name, create > 1);
 576 }
 577
 578 static void
 579 device_delete(struct device *dev)
 580 {
 581         if (!dev->avl.key)
 582                 return;
 583
 584         D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
 585         avl_delete(&devices, &dev->avl);
 586         dev->avl.key = NULL;
 587 }
 588
 589 static int device_cleanup_cb(void *ctx, struct safe_list *list)
 590 {
 591         struct device_user *dep = container_of(list, struct device_user, list);
 592         if (dep->cb)
 593                 dep->cb(dep, DEV_EVENT_REMOVE);
 594
 595         device_release(dep);
 596         return 0;
 597 }
 598
 599 void device_cleanup(struct device *dev)
 600 {
 601         D(DEVICE, "Clean up device '%s'\n", dev->ifname);
 602         safe_list_for_each(&dev->users, device_cleanup_cb, NULL);
 603         safe_list_for_each(&dev->aliases, device_cleanup_cb, NULL);
 604         device_delete(dev);
 605 }
 606
 607 static void __device_set_present(struct device *dev, bool state)
 608 {
 609         if (dev->present == state)
 610                 return;
 611
 612         dev->present = state;
 613         device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
 614 }
 615
 616 void
 617 device_refresh_present(struct device *dev)
 618 {
 619         bool state = dev->sys_present;
 620
 621         if (dev->disabled || dev->deferred)
 622                 state = false;
 623
 624         __device_set_present(dev, state);
 625 }
 626
 627 void device_set_present(struct device *dev, bool state)
 628 {
 629         if (dev->sys_present == state)
 630                 return;
 631
 632         D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
 633         dev->sys_present = state;
 634         device_refresh_present(dev);
 635 }
 636
 637 void device_set_link(struct device *dev, bool state)
 638 {
 639         if (dev->link_active == state)
 640                 return;
 641
 642         netifd_log_message(L_NOTICE, "%s '%s' link is %s\n", dev->type->name, dev->ifname, state ? "up" : "down" );
 643
 644         dev->link_active = state;
 645         device_broadcast_event(dev, state ? DEV_EVENT_LINK_UP : DEV_EVENT_LINK_DOWN);
 646 }
 647
 648 void device_set_ifindex(struct device *dev, int ifindex)
 649 {
 650         if (dev->ifindex == ifindex)
 651                 return;
 652
 653         dev->ifindex = ifindex;
 654         device_broadcast_event(dev, DEV_EVENT_UPDATE_IFINDEX);
 655 }
 656
 657 int device_set_ifname(struct device *dev, const char *name)
 658 {
 659         int ret = 0;
 660
 661         if (!strcmp(dev->ifname, name))
 662                 return 0;
 663
 664         if (dev->avl.key)
 665                 avl_delete(&devices, &dev->avl);
 666
 667         strncpy(dev->ifname, name, IFNAMSIZ);
 668
 669         if (dev->avl.key)
 670                 ret = avl_insert(&devices, &dev->avl);
 671
 672         if (ret == 0)
 673                 device_broadcast_event(dev, DEV_EVENT_UPDATE_IFNAME);
 674
 675         return ret;
 676 }
 677
 678 static int device_refcount(struct device *dev)
 679 {
 680         struct list_head *list;
 681         int count = 0;
 682
 683         list_for_each(list, &dev->users.list)
 684                 count++;
 685
 686         list_for_each(list, &dev->aliases.list)
 687                 count++;
 688
 689         return count;
 690 }
 691
 692 static void
 693 __device_add_user(struct device_user *dep, struct device *dev)
 694 {
 695         struct safe_list *head;
 696
 697         dep->dev = dev;
 698
 699         if (dep->alias)
 700                 head = &dev->aliases;
 701         else
 702                 head = &dev->users;
 703
 704         safe_list_add(&dep->list, head);
 705         D(DEVICE, "Add user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
 706
 707         if (dep->cb && dev->present) {
 708                 dep->cb(dep, DEV_EVENT_ADD);
 709                 if (dev->active)
 710                         dep->cb(dep, DEV_EVENT_UP);
 711
 712                 if (dev->link_active)
 713                         dep->cb(dep, DEV_EVENT_LINK_UP);
 714         }
 715 }
 716
 717 void device_add_user(struct device_user *dep, struct device *dev)
 718 {
 719         if (dep->dev == dev)
 720                 return;
 721
 722         if (dep->dev)
 723                 device_remove_user(dep);
 724
 725         if (!dev)
 726                 return;
 727
 728         __device_add_user(dep, dev);
 729 }
 730
 731 void
 732 device_free(struct device *dev)
 733 {
 734         __devlock++;
 735         free(dev->config);
 736         device_cleanup(dev);
 737         dev->type->free(dev);
 738         __devlock--;
 739 }
 740
 741 static void
 742 __device_free_unused(struct device *dev)
 743 {
 744         if (!safe_list_empty(&dev->users) ||
 745                 !safe_list_empty(&dev->aliases) ||
 746             dev->current_config || __devlock)
 747                 return;
 748
 749         device_free(dev);
 750 }
 751
 752 void device_remove_user(struct device_user *dep)
 753 {
 754         struct device *dev = dep->dev;
 755
 756         if (!dep->dev)
 757                 return;
 758
 759         dep->hotplug = false;
 760         if (dep->claimed)
 761                 device_release(dep);
 762
 763         safe_list_del(&dep->list);
 764         dep->dev = NULL;
 765         D(DEVICE, "Remove user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
 766         __device_free_unused(dev);
 767 }
 768
 769 void
 770 device_free_unused(struct device *dev)
 771 {
 772         struct device *tmp;
 773
 774         if (dev)
 775                 return __device_free_unused(dev);
 776
 777         avl_for_each_element_safe(&devices, dev, avl, tmp)
 778                 __device_free_unused(dev);
 779 }
 780
 781 void
 782 device_init_pending(void)
 783 {
 784         struct device *dev, *tmp;
 785
 786         avl_for_each_element_safe(&devices, dev, avl, tmp) {
 787                 if (!dev->config_pending)
 788                         continue;
 789
 790                 dev->type->config_init(dev);
 791                 dev->config_pending = false;
 792         }
 793 }
 794
 795 static enum dev_change_type
 796 device_set_config(struct device *dev, struct device_type *type,
 797                   struct blob_attr *attr)
 798 {
 799         struct blob_attr *tb[__DEV_ATTR_MAX];
 800         const struct uci_blob_param_list *cfg = type->config_params;
 801
 802         if (type != dev->type)
 803                 return DEV_CONFIG_RECREATE;
 804
 805         if (dev->type->reload)
 806                 return dev->type->reload(dev, attr);
 807
 808         if (uci_blob_check_equal(dev->config, attr, cfg))
 809                 return DEV_CONFIG_NO_CHANGE;
 810
 811         if (cfg == &device_attr_list) {
 812                 memset(tb, 0, sizeof(tb));
 813
 814                 if (attr)
 815                         blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
 816                                 blob_data(attr), blob_len(attr));
 817
 818                 device_init_settings(dev, tb);
 819                 return DEV_CONFIG_RESTART;
 820         } else
 821                 return DEV_CONFIG_RECREATE;
 822 }
 823
 824 enum dev_change_type
 825 device_apply_config(struct device *dev, struct device_type *type,
 826                     struct blob_attr *config)
 827 {
 828         enum dev_change_type change;
 829
 830         change = device_set_config(dev, type, config);
 831         if (dev->external) {
 832                 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
 833                 change = DEV_CONFIG_APPLIED;
 834         }
 835
 836         switch (change) {
 837                 case DEV_CONFIG_RESTART:
 838                 case DEV_CONFIG_APPLIED:
 839                         D(DEVICE, "Device '%s': config applied\n", dev->ifname);
 840                         config = blob_memdup(config);
 841                         free(dev->config);
 842                         dev->config = config;
 843                         if (change == DEV_CONFIG_RESTART && dev->present) {
 844                                 int ret = 0;
 845
 846                                 device_set_present(dev, false);
 847                                 if (dev->active && !dev->external) {
 848                                         ret = dev->set_state(dev, false);
 849                                         if (!ret)
 850                                                 ret = dev->set_state(dev, true);
 851                                 }
 852                                 if (!ret)
 853                                         device_set_present(dev, true);
 854                         }
 855                         break;
 856                 case DEV_CONFIG_NO_CHANGE:
 857                         D(DEVICE, "Device '%s': no configuration change\n", dev->ifname);
 858                         break;
 859                 case DEV_CONFIG_RECREATE:
 860                         break;
 861         }
 862
 863         return change;
 864 }
 865
 866 static void
 867 device_replace(struct device *dev, struct device *odev)
 868 {
 869         struct device_user *dep, *tmp;
 870
 871         __devlock++;
 872         if (odev->present)
 873                 device_set_present(odev, false);
 874
 875         list_for_each_entry_safe(dep, tmp, &odev->users.list, list.list) {
 876                 device_release(dep);
 877                 safe_list_del(&dep->list);
 878                 __device_add_user(dep, dev);
 879         }
 880         __devlock--;
 881
 882         device_free(odev);
 883 }
 884
 885 void
 886 device_reset_config(void)
 887 {
 888         struct device *dev;
 889
 890         avl_for_each_element(&devices, dev, avl)
 891                 dev->current_config = false;
 892 }
 893
 894 void
 895 device_reset_old(void)
 896 {
 897         struct device *dev, *tmp, *ndev;
 898
 899         avl_for_each_element_safe(&devices, dev, avl, tmp) {
 900                 if (dev->current_config || dev->default_config)
 901                         continue;
 902
 903                 if (dev->type != &simple_device_type)
 904                         continue;
 905
 906                 ndev = device_create_default(dev->ifname, dev->external);
 907                 if (!ndev)
 908                         continue;
 909
 910                 device_replace(ndev, dev);
 911         }
 912 }
 913
 914 void
 915 device_set_default_ps(bool state)
 916 {
 917         struct device *dev;
 918
 919         if (state == default_ps)
 920                 return;
 921
 922         default_ps = state;
 923
 924         avl_for_each_element(&devices, dev, avl) {
 925                 struct device_settings *s = &dev->settings;
 926                 unsigned int apply_mask = 0;
 927
 928                 if (!(s->flags & DEV_OPT_RPS)) {
 929                         s->rps = default_ps;
 930                         apply_mask |= DEV_OPT_RPS;
 931                 }
 932
 933                 if (!(s->flags & DEV_OPT_XPS)) {
 934                         s->xps = default_ps;
 935                         apply_mask |= DEV_OPT_XPS;
 936                 }
 937
 938                 if (!apply_mask)
 939                         continue;
 940
 941                 if (!(dev->external || (dev->present && dev->active)) ||
 942                                 dev->config_pending)
 943                         continue;
 944
 945                 system_if_apply_settings(dev, s, apply_mask);
 946         }
 947 }
 948
 949 struct device *
 950 device_create(const char *name, struct device_type *type,
 951               struct blob_attr *config)
 952 {
 953         struct device *odev = NULL, *dev;
 954         enum dev_change_type change;
 955
 956         odev = device_find(name);
 957         if (odev) {
 958                 odev->current_config = true;
 959                 change = device_apply_config(odev, type, config);
 960                 switch (change) {
 961                 case DEV_CONFIG_RECREATE:
 962                         D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
 963                         device_delete(odev);
 964                         break;
 965                 default:
 966                         return odev;
 967                 }
 968         } else
 969                 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
 970
 971         config = blob_memdup(config);
 972         if (!config)
 973                 return NULL;
 974
 975         dev = type->create(name, type, config);
 976         if (!dev)
 977                 return NULL;
 978
 979         dev->current_config = true;
 980         dev->config = config;
 981         if (odev)
 982                 device_replace(dev, odev);
 983
 984         if (!config_init && dev->config_pending) {
 985                 type->config_init(dev);
 986                 dev->config_pending = false;
 987         }
 988
 989         return dev;
 990 }
 991
 992 void
 993 device_dump_status(struct blob_buf *b, struct device *dev)
 994 {
 995         struct device_settings st;
 996         void *c, *s;
 997
 998         if (!dev) {
 999                 avl_for_each_element(&devices, dev, avl) {
1000                         if (!dev->present)
1001                                 continue;
1002                         c = blobmsg_open_table(b, dev->ifname);
1003                         device_dump_status(b, dev);
1004                         blobmsg_close_table(b, c);
1005                 }
1006
1007                 return;
1008         }
1009
1010         blobmsg_add_u8(b, "external", dev->external);
1011         blobmsg_add_u8(b, "present", dev->present);
1012         blobmsg_add_string(b, "type", dev->type->name);
1013
1014         if (!dev->present)
1015                 return;
1016
1017         blobmsg_add_u8(b, "up", !!dev->active);
1018         blobmsg_add_u8(b, "carrier", !!dev->link_active);
1019
1020         if (dev->type->dump_info)
1021                 dev->type->dump_info(dev, b);
1022         else
1023                 system_if_dump_info(dev, b);
1024
1025         if (dev->active) {
1026                 device_merge_settings(dev, &st);
1027                 if (st.flags & DEV_OPT_MTU)
1028                         blobmsg_add_u32(b, "mtu", st.mtu);
1029                 if (st.flags & DEV_OPT_MTU6)
1030                         blobmsg_add_u32(b, "mtu6", st.mtu6);
1031                 if (st.flags & DEV_OPT_MACADDR)
1032                         blobmsg_add_string(b, "macaddr", format_macaddr(st.macaddr));
1033                 if (st.flags & DEV_OPT_TXQUEUELEN)
1034                         blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
1035                 if (st.flags & DEV_OPT_IPV6)
1036                         blobmsg_add_u8(b, "ipv6", st.ipv6);
1037                 if (st.flags & DEV_OPT_PROMISC)
1038                         blobmsg_add_u8(b, "promisc", st.promisc);
1039                 if (st.flags & DEV_OPT_RPFILTER)
1040                         blobmsg_add_u32(b, "rpfilter", st.rpfilter);
1041                 if (st.flags & DEV_OPT_ACCEPTLOCAL)
1042                         blobmsg_add_u8(b, "acceptlocal", st.acceptlocal);
1043                 if (st.flags & DEV_OPT_IGMPVERSION)
1044                         blobmsg_add_u32(b, "igmpversion", st.igmpversion);
1045                 if (st.flags & DEV_OPT_MLDVERSION)
1046                         blobmsg_add_u32(b, "mldversion", st.mldversion);
1047                 if (st.flags & DEV_OPT_NEIGHREACHABLETIME) {
1048                         blobmsg_add_u32(b, "neigh4reachabletime", st.neigh4reachabletime);
1049                         blobmsg_add_u32(b, "neigh6reachabletime", st.neigh6reachabletime);
1050                 }
1051                 if (st.flags & DEV_OPT_NEIGHGCSTALETIME) {
1052                         blobmsg_add_u32(b, "neigh4gcstaletime", st.neigh4gcstaletime);
1053                         blobmsg_add_u32(b, "neigh6gcstaletime", st.neigh6gcstaletime);
1054                 }
1055                 if (st.flags & DEV_OPT_NEIGHLOCKTIME)
1056                         blobmsg_add_u32(b, "neigh4locktime", st.neigh4locktime);
1057                 if (st.flags & DEV_OPT_DADTRANSMITS)
1058                         blobmsg_add_u32(b, "dadtransmits", st.dadtransmits);
1059                 if (st.flags & DEV_OPT_MULTICAST_TO_UNICAST)
1060                         blobmsg_add_u8(b, "multicast_to_unicast", st.multicast_to_unicast);
1061                 if (st.flags & DEV_OPT_MULTICAST_ROUTER)
1062                         blobmsg_add_u32(b, "multicast_router", st.multicast_router);
1063                 if (st.flags & DEV_OPT_MULTICAST_FAST_LEAVE)
1064                         blobmsg_add_u8(b, "multicast_fast_leave", st.multicast_fast_leave);
1065                 if (st.flags & DEV_OPT_MULTICAST)
1066                         blobmsg_add_u8(b, "multicast", st.multicast);
1067                 if (st.flags & DEV_OPT_LEARNING)
1068                         blobmsg_add_u8(b, "learning", st.learning);
1069                 if (st.flags & DEV_OPT_UNICAST_FLOOD)
1070                         blobmsg_add_u8(b, "unicast_flood", st.unicast_flood);
1071                 if (st.flags & DEV_OPT_SENDREDIRECTS)
1072                         blobmsg_add_u8(b, "sendredirects", st.sendredirects);
1073         }
1074
1075         s = blobmsg_open_table(b, "statistics");
1076         if (dev->type->dump_stats)
1077                 dev->type->dump_stats(dev, b);
1078         else
1079                 system_if_dump_stats(dev, b);
1080         blobmsg_close_table(b, s);
1081 }
1082
1083 static void __init simple_device_type_init(void)
1084 {
1085         device_type_add(&simple_device_type);
1086 }