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 static int default_rps_val;
  37 static int default_rps_flow_cnt;
  38 static int default_xps_val;
  39
  40 static const struct blobmsg_policy dev_attrs[__DEV_ATTR_MAX] = {
  41         [DEV_ATTR_TYPE] = { .name = "type", .type = BLOBMSG_TYPE_STRING },
  42         [DEV_ATTR_MTU] = { .name = "mtu", .type = BLOBMSG_TYPE_INT32 },
  43         [DEV_ATTR_MTU6] = { .name = "mtu6", .type = BLOBMSG_TYPE_INT32 },
  44         [DEV_ATTR_MACADDR] = { .name = "macaddr", .type = BLOBMSG_TYPE_STRING },
  45         [DEV_ATTR_TXQUEUELEN] = { .name = "txqueuelen", .type = BLOBMSG_TYPE_INT32 },
  46         [DEV_ATTR_ENABLED] = { .name = "enabled", .type = BLOBMSG_TYPE_BOOL },
  47         [DEV_ATTR_IPV6] = { .name = "ipv6", .type = BLOBMSG_TYPE_BOOL },
  48         [DEV_ATTR_PROMISC] = { .name = "promisc", .type = BLOBMSG_TYPE_BOOL },
  49         [DEV_ATTR_RPFILTER] = { .name = "rpfilter", .type = BLOBMSG_TYPE_STRING },
  50         [DEV_ATTR_ACCEPTLOCAL] = { .name = "acceptlocal", .type = BLOBMSG_TYPE_BOOL },
  51         [DEV_ATTR_IGMPVERSION] = { .name = "igmpversion", .type = BLOBMSG_TYPE_INT32 },
  52         [DEV_ATTR_MLDVERSION] = { .name = "mldversion", .type = BLOBMSG_TYPE_INT32 },
  53         [DEV_ATTR_NEIGHREACHABLETIME] = { .name = "neighreachabletime", .type = BLOBMSG_TYPE_INT32 },
  54         [DEV_ATTR_NEIGHGCSTALETIME] = { .name = "neighgcstaletime", .type = BLOBMSG_TYPE_INT32 },
  55         [DEV_ATTR_RPS] = { .name = "rps", .type = BLOBMSG_TYPE_BOOL },
  56         [DEV_ATTR_XPS] = { .name = "xps", .type = BLOBMSG_TYPE_BOOL },
  57         [DEV_ATTR_DADTRANSMITS] = { .name = "dadtransmits", .type = BLOBMSG_TYPE_INT32 },
  58         [DEV_ATTR_MULTICAST_TO_UNICAST] = { .name = "multicast_to_unicast", .type = BLOBMSG_TYPE_BOOL },
  59         [DEV_ATTR_MULTICAST_ROUTER] = { .name = "multicast_router", .type = BLOBMSG_TYPE_INT32 },
  60         [DEV_ATTR_MULTICAST_FAST_LEAVE] = { .name = "multicast_fast_leave", . type = BLOBMSG_TYPE_BOOL },
  61         [DEV_ATTR_MULTICAST] = { .name ="multicast", .type = BLOBMSG_TYPE_BOOL },
  62         [DEV_ATTR_LEARNING] = { .name ="learning", .type = BLOBMSG_TYPE_BOOL },
  63         [DEV_ATTR_UNICAST_FLOOD] = { .name ="unicast_flood", .type = BLOBMSG_TYPE_BOOL },
  64         [DEV_ATTR_SENDREDIRECTS] = { .name = "sendredirects", .type = BLOBMSG_TYPE_BOOL },
  65         [DEV_ATTR_NEIGHLOCKTIME] = { .name = "neighlocktime", .type = BLOBMSG_TYPE_INT32 },
  66 };
  67
  68 const struct uci_blob_param_list device_attr_list = {
  69         .n_params = __DEV_ATTR_MAX,
  70         .params = dev_attrs,
  71 };
  72
  73 static int __devlock = 0;
  74
  75 int device_type_add(struct device_type *devtype)
  76 {
  77         if (device_type_get(devtype->name)) {
  78                 netifd_log_message(L_WARNING, "Device handler '%s' already exists\n",
  79                                    devtype->name);
  80                 return 1;
  81         }
  82
  83         netifd_log_message(L_NOTICE, "Added device handler type: %s\n",
  84                 devtype->name);
  85
  86         list_add(&devtype->list, &devtypes);
  87         return 0;
  88 }
  89
  90 /* Retrieve the device type for the given name. If 'bridge' is true, the type
  91  * must have bridge capabilities
  92  */
  93 struct device_type *
  94 device_type_get(const char *tname)
  95 {
  96         struct device_type *cur;
  97
  98         list_for_each_entry(cur, &devtypes, list)
  99                 if (!strcmp(cur->name, tname))
 100                         return cur;
 101
 102         return NULL;
 103 }
 104
 105 void device_lock(void)
 106 {
 107         __devlock++;
 108 }
 109
 110 void device_unlock(void)
 111 {
 112         __devlock--;
 113         if (!__devlock)
 114                 device_free_unused(NULL);
 115 }
 116
 117 static int set_device_state(struct device *dev, bool state)
 118 {
 119         if (state) {
 120                 /* Get ifindex for all devices being enabled so a valid  */
 121                 /* ifindex is in place avoiding possible race conditions */
 122                 device_set_ifindex(dev, system_if_resolve(dev));
 123                 if (!dev->ifindex)
 124                         return -1;
 125
 126                 system_if_up(dev);
 127         }
 128         else
 129                 system_if_down(dev);
 130
 131         return 0;
 132 }
 133
 134 static int
 135 simple_device_set_state(struct device *dev, bool state)
 136 {
 137         struct device *pdev;
 138         int ret = 0;
 139
 140         pdev = dev->parent.dev;
 141         if (state && !pdev) {
 142                 pdev = system_if_get_parent(dev);
 143                 if (pdev)
 144                         device_add_user(&dev->parent, pdev);
 145         }
 146
 147         if (pdev) {
 148                 if (state)
 149                         ret = device_claim(&dev->parent);
 150                 else
 151                         device_release(&dev->parent);
 152
 153                 if (ret < 0)
 154                         return ret;
 155         }
 156         return set_device_state(dev, state);
 157 }
 158
 159 static struct device *
 160 simple_device_create(const char *name, struct device_type *devtype,
 161                      struct blob_attr *attr)
 162 {
 163         struct blob_attr *tb[__DEV_ATTR_MAX];
 164         struct device *dev = NULL;
 165
 166         /* device type is unused for simple devices */
 167         devtype = NULL;
 168
 169         blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb, blob_data(attr), blob_len(attr));
 170         dev = device_get(name, true);
 171         if (!dev)
 172                 return NULL;
 173
 174         dev->set_state = simple_device_set_state;
 175         device_init_settings(dev, tb);
 176
 177         return dev;
 178 }
 179
 180 static void simple_device_free(struct device *dev)
 181 {
 182         if (dev->parent.dev)
 183                 device_remove_user(&dev->parent);
 184         free(dev);
 185 }
 186
 187 struct device_type simple_device_type = {
 188         .name = "Network device",
 189         .config_params = &device_attr_list,
 190
 191         .create = simple_device_create,
 192         .check_state = system_if_check,
 193         .free = simple_device_free,
 194 };
 195
 196 static void
 197 device_merge_settings(struct device *dev, struct device_settings *n)
 198 {
 199         struct device_settings *os = &dev->orig_settings;
 200         struct device_settings *s = &dev->settings;
 201
 202         memset(n, 0, sizeof(*n));
 203         n->mtu = s->flags & DEV_OPT_MTU ? s->mtu : os->mtu;
 204         n->mtu6 = s->flags & DEV_OPT_MTU6 ? s->mtu6 : os->mtu6;
 205         n->txqueuelen = s->flags & DEV_OPT_TXQUEUELEN ?
 206                 s->txqueuelen : os->txqueuelen;
 207         memcpy(n->macaddr,
 208                 (s->flags & DEV_OPT_MACADDR ? s->macaddr : os->macaddr),
 209                 sizeof(n->macaddr));
 210         n->ipv6 = s->flags & DEV_OPT_IPV6 ? s->ipv6 : os->ipv6;
 211         n->promisc = s->flags & DEV_OPT_PROMISC ? s->promisc : os->promisc;
 212         n->rpfilter = s->flags & DEV_OPT_RPFILTER ? s->rpfilter : os->rpfilter;
 213         n->acceptlocal = s->flags & DEV_OPT_ACCEPTLOCAL ? s->acceptlocal : os->acceptlocal;
 214         n->igmpversion = s->flags & DEV_OPT_IGMPVERSION ? s->igmpversion : os->igmpversion;
 215         n->mldversion = s->flags & DEV_OPT_MLDVERSION ? s->mldversion : os->mldversion;
 216         n->neigh4reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
 217                 s->neigh4reachabletime : os->neigh4reachabletime;
 218         n->neigh6reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
 219                 s->neigh6reachabletime : os->neigh6reachabletime;
 220         n->neigh4gcstaletime = s->flags & DEV_OPT_NEIGHGCSTALETIME ?
 221                 s->neigh4gcstaletime : os->neigh4gcstaletime;
 222         n->neigh6gcstaletime = s->flags & DEV_OPT_NEIGHGCSTALETIME ?
 223                 s->neigh6gcstaletime : os->neigh6gcstaletime;
 224         n->neigh4locktime = s->flags & DEV_OPT_NEIGHLOCKTIME ?
 225                 s->neigh4locktime : os->neigh4locktime;
 226         n->dadtransmits = s->flags & DEV_OPT_DADTRANSMITS ?
 227                 s->dadtransmits : os->dadtransmits;
 228         n->multicast = s->flags & DEV_OPT_MULTICAST ?
 229                 s->multicast : os->multicast;
 230         n->multicast_to_unicast = s->multicast_to_unicast;
 231         n->multicast_router = s->multicast_router;
 232         n->multicast_fast_leave = s->multicast_fast_leave;
 233         n->learning = s->learning;
 234         n->unicast_flood = s->unicast_flood;
 235         n->sendredirects = s->flags & DEV_OPT_SENDREDIRECTS ?
 236                 s->sendredirects : os->sendredirects;
 237         n->flags = s->flags | os->flags | os->valid_flags;
 238 }
 239
 240 void
 241 device_init_settings(struct device *dev, struct blob_attr **tb)
 242 {
 243         struct device_settings *s = &dev->settings;
 244         struct blob_attr *cur;
 245         struct ether_addr *ea;
 246         bool disabled = false;
 247
 248         s->flags = 0;
 249         if ((cur = tb[DEV_ATTR_ENABLED]))
 250                 disabled = !blobmsg_get_bool(cur);
 251
 252         if ((cur = tb[DEV_ATTR_MTU]) && blobmsg_get_u32(cur) >= 68) {
 253                 s->mtu = blobmsg_get_u32(cur);
 254                 s->flags |= DEV_OPT_MTU;
 255         }
 256
 257         if ((cur = tb[DEV_ATTR_MTU6]) && blobmsg_get_u32(cur) >= 1280) {
 258                 s->mtu6 = blobmsg_get_u32(cur);
 259                 s->flags |= DEV_OPT_MTU6;
 260         }
 261
 262         if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
 263                 s->txqueuelen = blobmsg_get_u32(cur);
 264                 s->flags |= DEV_OPT_TXQUEUELEN;
 265         }
 266
 267         if ((cur = tb[DEV_ATTR_MACADDR])) {
 268                 ea = ether_aton(blobmsg_data(cur));
 269                 if (ea) {
 270                         memcpy(s->macaddr, ea, 6);
 271                         s->flags |= DEV_OPT_MACADDR;
 272                 }
 273         }
 274
 275         if ((cur = tb[DEV_ATTR_IPV6])) {
 276                 s->ipv6 = blobmsg_get_bool(cur);
 277                 s->flags |= DEV_OPT_IPV6;
 278         }
 279
 280         if ((cur = tb[DEV_ATTR_PROMISC])) {
 281                 s->promisc = blobmsg_get_bool(cur);
 282                 s->flags |= DEV_OPT_PROMISC;
 283         }
 284
 285         if ((cur = tb[DEV_ATTR_RPFILTER])) {
 286                 if (system_resolve_rpfilter(blobmsg_data(cur), &s->rpfilter))
 287                         s->flags |= DEV_OPT_RPFILTER;
 288                 else
 289                         DPRINTF("Failed to resolve rpfilter: %s\n", (char *) blobmsg_data(cur));
 290         }
 291
 292         if ((cur = tb[DEV_ATTR_ACCEPTLOCAL])) {
 293                 s->acceptlocal = blobmsg_get_bool(cur);
 294                 s->flags |= DEV_OPT_ACCEPTLOCAL;
 295         }
 296
 297         if ((cur = tb[DEV_ATTR_IGMPVERSION])) {
 298                 s->igmpversion = blobmsg_get_u32(cur);
 299                 if (s->igmpversion >= 1 && s->igmpversion <= 3)
 300                         s->flags |= DEV_OPT_IGMPVERSION;
 301                 else
 302                         DPRINTF("Failed to resolve igmpversion: %d\n", blobmsg_get_u32(cur));
 303         }
 304
 305         if ((cur = tb[DEV_ATTR_MLDVERSION])) {
 306                 s->mldversion = blobmsg_get_u32(cur);
 307                 if (s->mldversion >= 1 && s->mldversion <= 2)
 308                         s->flags |= DEV_OPT_MLDVERSION;
 309                 else
 310                         DPRINTF("Failed to resolve mldversion: %d\n", blobmsg_get_u32(cur));
 311         }
 312
 313         if ((cur = tb[DEV_ATTR_NEIGHREACHABLETIME])) {
 314                 s->neigh6reachabletime = s->neigh4reachabletime = blobmsg_get_u32(cur);
 315                 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
 316         }
 317
 318         if ((cur = tb[DEV_ATTR_NEIGHGCSTALETIME])) {
 319                 s->neigh6gcstaletime = s->neigh4gcstaletime = blobmsg_get_u32(cur);
 320                 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
 321         }
 322
 323         if ((cur = tb[DEV_ATTR_NEIGHLOCKTIME])) {
 324                 s->neigh4locktime = blobmsg_get_u32(cur);
 325                 s->flags |= DEV_OPT_NEIGHLOCKTIME;
 326         }
 327
 328         if ((cur = tb[DEV_ATTR_RPS])) {
 329                 s->rps = blobmsg_get_bool(cur);
 330                 s->flags |= DEV_OPT_RPS;
 331         }
 332         else
 333                 s->rps = default_ps;
 334
 335         if ((cur = tb[DEV_ATTR_XPS])) {
 336                 s->xps = blobmsg_get_bool(cur);
 337                 s->flags |= DEV_OPT_XPS;
 338         }
 339         else
 340                 s->xps = default_ps;
 341
 342         if ((cur = tb[DEV_ATTR_DADTRANSMITS])) {
 343                 s->dadtransmits = blobmsg_get_u32(cur);
 344                 s->flags |= DEV_OPT_DADTRANSMITS;
 345         }
 346
 347         if ((cur = tb[DEV_ATTR_MULTICAST_TO_UNICAST])) {
 348                 s->multicast_to_unicast = blobmsg_get_bool(cur);
 349                 s->flags |= DEV_OPT_MULTICAST_TO_UNICAST;
 350         }
 351
 352         if ((cur = tb[DEV_ATTR_MULTICAST_ROUTER])) {
 353                 s->multicast_router = blobmsg_get_u32(cur);
 354                 if (s->multicast_router <= 2)
 355                         s->flags |= DEV_OPT_MULTICAST_ROUTER;
 356                 else
 357                         DPRINTF("Invalid value: %d - (Use 0: never, 1: learn, 2: always)\n", blobmsg_get_u32(cur));
 358         }
 359
 360         if ((cur = tb[DEV_ATTR_MULTICAST_FAST_LEAVE])) {
 361                 s->multicast_fast_leave = blobmsg_get_bool(cur);
 362                 s->flags |= DEV_OPT_MULTICAST_FAST_LEAVE;
 363         }
 364
 365         if ((cur = tb[DEV_ATTR_MULTICAST])) {
 366                 s->multicast = blobmsg_get_bool(cur);
 367                 s->flags |= DEV_OPT_MULTICAST;
 368         }
 369
 370         if ((cur = tb[DEV_ATTR_LEARNING])) {
 371                 s->learning = blobmsg_get_bool(cur);
 372                 s->flags |= DEV_OPT_LEARNING;
 373         }
 374
 375         if ((cur = tb[DEV_ATTR_UNICAST_FLOOD])) {
 376                 s->unicast_flood = blobmsg_get_bool(cur);
 377                 s->flags |= DEV_OPT_UNICAST_FLOOD;
 378         }
 379
 380         if ((cur = tb[DEV_ATTR_SENDREDIRECTS])) {
 381                 s->sendredirects = blobmsg_get_bool(cur);
 382                 s->flags |= DEV_OPT_SENDREDIRECTS;
 383         }
 384
 385         device_set_disabled(dev, disabled);
 386 }
 387
 388 static void __init dev_init(void)
 389 {
 390         avl_init(&devices, avl_strcmp, true, NULL);
 391 }
 392
 393 static int device_broadcast_cb(void *ctx, struct safe_list *list)
 394 {
 395         struct device_user *dep = container_of(list, struct device_user, list);
 396         int *ev = ctx;
 397
 398         /* device might have been removed by an earlier callback */
 399         if (!dep->dev)
 400                 return 0;
 401
 402         if (dep->cb)
 403                 dep->cb(dep, *ev);
 404         return 0;
 405 }
 406
 407 void device_broadcast_event(struct device *dev, enum device_event ev)
 408 {
 409         int dev_ev = ev;
 410
 411         safe_list_for_each(&dev->aliases, device_broadcast_cb, &dev_ev);
 412         safe_list_for_each(&dev->users, device_broadcast_cb, &dev_ev);
 413 }
 414
 415 int device_claim(struct device_user *dep)
 416 {
 417         struct device *dev = dep->dev;
 418         int ret = 0;
 419
 420         if (dep->claimed)
 421                 return 0;
 422
 423         if (!dev)
 424                 return -1;
 425
 426         dep->claimed = true;
 427         D(DEVICE, "Claim %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active + 1);
 428         if (++dev->active != 1)
 429                 return 0;
 430
 431         device_broadcast_event(dev, DEV_EVENT_SETUP);
 432         if (dev->external) {
 433                 /* Get ifindex for external claimed devices so a valid   */
 434                 /* ifindex is in place avoiding possible race conditions */
 435                 device_set_ifindex(dev, system_if_resolve(dev));
 436                 if (!dev->ifindex)
 437                         ret = -1;
 438
 439                 system_if_get_settings(dev, &dev->orig_settings);
 440         } else
 441                 ret = dev->set_state(dev, true);
 442
 443         if (ret == 0)
 444                 device_broadcast_event(dev, DEV_EVENT_UP);
 445         else {
 446                 D(DEVICE, "claim %s %s failed: %d\n", dev->type->name, dev->ifname, ret);
 447                 dev->active = 0;
 448                 dep->claimed = false;
 449         }
 450
 451         return ret;
 452 }
 453
 454 void device_release(struct device_user *dep)
 455 {
 456         struct device *dev = dep->dev;
 457
 458         if (!dep->claimed)
 459                 return;
 460
 461         dep->claimed = false;
 462         dev->active--;
 463         D(DEVICE, "Release %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active);
 464         assert(dev->active >= 0);
 465
 466         if (dev->active)
 467                 return;
 468
 469         device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
 470         if (!dev->external)
 471                 dev->set_state(dev, false);
 472
 473         if (dev->active)
 474                 return;
 475
 476         device_broadcast_event(dev, DEV_EVENT_DOWN);
 477 }
 478
 479 int device_check_state(struct device *dev)
 480 {
 481         if (!dev->type->check_state)
 482                 return simple_device_type.check_state(dev);
 483
 484         return dev->type->check_state(dev);
 485 }
 486
 487 void device_init_virtual(struct device *dev, struct device_type *type, const char *name)
 488 {
 489         assert(dev);
 490         assert(type);
 491
 492         D(DEVICE, "Initialize device '%s'\n", name ? name : "");
 493         INIT_SAFE_LIST(&dev->users);
 494         INIT_SAFE_LIST(&dev->aliases);
 495         dev->type = type;
 496
 497         if (name)
 498                 device_set_ifname(dev, name);
 499
 500         if (!dev->set_state)
 501                 dev->set_state = set_device_state;
 502 }
 503
 504 int device_init(struct device *dev, struct device_type *type, const char *ifname)
 505 {
 506         int ret;
 507
 508         device_init_virtual(dev, type, ifname);
 509
 510         dev->avl.key = dev->ifname;
 511
 512         ret = avl_insert(&devices, &dev->avl);
 513         if (ret < 0)
 514                 return ret;
 515
 516         system_if_clear_state(dev);
 517         device_check_state(dev);
 518         dev->settings.rps = default_ps;
 519         dev->settings.xps = default_ps;
 520
 521         return 0;
 522 }
 523
 524 static struct device *
 525 device_create_default(const char *name, bool external)
 526 {
 527         struct device *dev;
 528
 529         if (!external && system_if_force_external(name))
 530                 return NULL;
 531
 532         D(DEVICE, "Create simple device '%s'\n", name);
 533         dev = calloc(1, sizeof(*dev));
 534         if (!dev)
 535                 return NULL;
 536
 537         dev->external = external;
 538         dev->set_state = simple_device_set_state;
 539         device_init(dev, &simple_device_type, name);
 540         dev->default_config = true;
 541         if (external)
 542                 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
 543         return dev;
 544 }
 545
 546 struct device *
 547 device_find(const char *name)
 548 {
 549         struct device *dev;
 550
 551         return avl_find_element(&devices, name, dev, avl);
 552 }
 553
 554 struct device *
 555 device_get(const char *name, int create)
 556 {
 557         struct device *dev;
 558
 559         if (strchr(name, '.'))
 560                 return get_vlan_device_chain(name, create);
 561
 562         if (name[0] == '@')
 563                 return device_alias_get(name + 1);
 564
 565         dev = avl_find_element(&devices, name, dev, avl);
 566         if (dev) {
 567                 if (create > 1 && !dev->external) {
 568                         system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
 569                         dev->external = true;
 570                         device_set_present(dev, true);
 571                 }
 572                 return dev;
 573         }
 574
 575         if (!create)
 576                 return NULL;
 577
 578         return device_create_default(name, create > 1);
 579 }
 580
 581 static void
 582 device_delete(struct device *dev)
 583 {
 584         if (!dev->avl.key)
 585                 return;
 586
 587         D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
 588         avl_delete(&devices, &dev->avl);
 589         dev->avl.key = NULL;
 590 }
 591
 592 static int device_cleanup_cb(void *ctx, struct safe_list *list)
 593 {
 594         struct device_user *dep = container_of(list, struct device_user, list);
 595         if (dep->cb)
 596                 dep->cb(dep, DEV_EVENT_REMOVE);
 597
 598         device_release(dep);
 599         return 0;
 600 }
 601
 602 void device_cleanup(struct device *dev)
 603 {
 604         D(DEVICE, "Clean up device '%s'\n", dev->ifname);
 605         safe_list_for_each(&dev->users, device_cleanup_cb, NULL);
 606         safe_list_for_each(&dev->aliases, device_cleanup_cb, NULL);
 607         device_delete(dev);
 608 }
 609
 610 static void __device_set_present(struct device *dev, bool state)
 611 {
 612         if (dev->present == state)
 613                 return;
 614
 615         dev->present = state;
 616         device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
 617 }
 618
 619 void
 620 device_refresh_present(struct device *dev)
 621 {
 622         bool state = dev->sys_present;
 623
 624         if (dev->disabled || dev->deferred)
 625                 state = false;
 626
 627         __device_set_present(dev, state);
 628 }
 629
 630 void device_set_present(struct device *dev, bool state)
 631 {
 632         if (dev->sys_present == state)
 633                 return;
 634
 635         D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
 636         dev->sys_present = state;
 637         device_refresh_present(dev);
 638 }
 639
 640 void device_set_link(struct device *dev, bool state)
 641 {
 642         if (dev->link_active == state)
 643                 return;
 644
 645         netifd_log_message(L_NOTICE, "%s '%s' link is %s\n", dev->type->name, dev->ifname, state ? "up" : "down" );
 646
 647         dev->link_active = state;
 648         device_broadcast_event(dev, state ? DEV_EVENT_LINK_UP : DEV_EVENT_LINK_DOWN);
 649 }
 650
 651 void device_set_ifindex(struct device *dev, int ifindex)
 652 {
 653         if (dev->ifindex == ifindex)
 654                 return;
 655
 656         dev->ifindex = ifindex;
 657         device_broadcast_event(dev, DEV_EVENT_UPDATE_IFINDEX);
 658 }
 659
 660 int device_set_ifname(struct device *dev, const char *name)
 661 {
 662         int ret = 0;
 663
 664         if (!strcmp(dev->ifname, name))
 665                 return 0;
 666
 667         if (dev->avl.key)
 668                 avl_delete(&devices, &dev->avl);
 669
 670         strncpy(dev->ifname, name, IFNAMSIZ);
 671
 672         if (dev->avl.key)
 673                 ret = avl_insert(&devices, &dev->avl);
 674
 675         if (ret == 0)
 676                 device_broadcast_event(dev, DEV_EVENT_UPDATE_IFNAME);
 677
 678         return ret;
 679 }
 680
 681 static int device_refcount(struct device *dev)
 682 {
 683         struct list_head *list;
 684         int count = 0;
 685
 686         list_for_each(list, &dev->users.list)
 687                 count++;
 688
 689         list_for_each(list, &dev->aliases.list)
 690                 count++;
 691
 692         return count;
 693 }
 694
 695 static void
 696 __device_add_user(struct device_user *dep, struct device *dev)
 697 {
 698         struct safe_list *head;
 699
 700         dep->dev = dev;
 701
 702         if (dep->alias)
 703                 head = &dev->aliases;
 704         else
 705                 head = &dev->users;
 706
 707         safe_list_add(&dep->list, head);
 708         D(DEVICE, "Add user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
 709
 710         if (dep->cb && dev->present) {
 711                 dep->cb(dep, DEV_EVENT_ADD);
 712                 if (dev->active)
 713                         dep->cb(dep, DEV_EVENT_UP);
 714
 715                 if (dev->link_active)
 716                         dep->cb(dep, DEV_EVENT_LINK_UP);
 717         }
 718 }
 719
 720 void device_add_user(struct device_user *dep, struct device *dev)
 721 {
 722         if (dep->dev == dev)
 723                 return;
 724
 725         if (dep->dev)
 726                 device_remove_user(dep);
 727
 728         if (!dev)
 729                 return;
 730
 731         __device_add_user(dep, dev);
 732 }
 733
 734 void
 735 device_free(struct device *dev)
 736 {
 737         __devlock++;
 738         free(dev->config);
 739         device_cleanup(dev);
 740         dev->type->free(dev);
 741         __devlock--;
 742 }
 743
 744 static void
 745 __device_free_unused(struct device *dev)
 746 {
 747         if (!safe_list_empty(&dev->users) ||
 748                 !safe_list_empty(&dev->aliases) ||
 749             dev->current_config || __devlock)
 750                 return;
 751
 752         device_free(dev);
 753 }
 754
 755 void device_remove_user(struct device_user *dep)
 756 {
 757         struct device *dev = dep->dev;
 758
 759         if (!dep->dev)
 760                 return;
 761
 762         dep->hotplug = false;
 763         if (dep->claimed)
 764                 device_release(dep);
 765
 766         safe_list_del(&dep->list);
 767         dep->dev = NULL;
 768         D(DEVICE, "Remove user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
 769         __device_free_unused(dev);
 770 }
 771
 772 void
 773 device_free_unused(struct device *dev)
 774 {
 775         struct device *tmp;
 776
 777         if (dev)
 778                 return __device_free_unused(dev);
 779
 780         avl_for_each_element_safe(&devices, dev, avl, tmp)
 781                 __device_free_unused(dev);
 782 }
 783
 784 void
 785 device_init_pending(void)
 786 {
 787         struct device *dev, *tmp;
 788
 789         avl_for_each_element_safe(&devices, dev, avl, tmp) {
 790                 if (!dev->config_pending)
 791                         continue;
 792
 793                 dev->type->config_init(dev);
 794                 dev->config_pending = false;
 795         }
 796 }
 797
 798 static enum dev_change_type
 799 device_set_config(struct device *dev, struct device_type *type,
 800                   struct blob_attr *attr)
 801 {
 802         struct blob_attr *tb[__DEV_ATTR_MAX];
 803         const struct uci_blob_param_list *cfg = type->config_params;
 804
 805         if (type != dev->type)
 806                 return DEV_CONFIG_RECREATE;
 807
 808         if (dev->type->reload)
 809                 return dev->type->reload(dev, attr);
 810
 811         if (uci_blob_check_equal(dev->config, attr, cfg))
 812                 return DEV_CONFIG_NO_CHANGE;
 813
 814         if (cfg == &device_attr_list) {
 815                 memset(tb, 0, sizeof(tb));
 816
 817                 if (attr)
 818                         blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
 819                                 blob_data(attr), blob_len(attr));
 820
 821                 device_init_settings(dev, tb);
 822                 return DEV_CONFIG_RESTART;
 823         } else
 824                 return DEV_CONFIG_RECREATE;
 825 }
 826
 827 enum dev_change_type
 828 device_apply_config(struct device *dev, struct device_type *type,
 829                     struct blob_attr *config)
 830 {
 831         enum dev_change_type change;
 832
 833         change = device_set_config(dev, type, config);
 834         if (dev->external) {
 835                 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
 836                 change = DEV_CONFIG_APPLIED;
 837         }
 838
 839         switch (change) {
 840                 case DEV_CONFIG_RESTART:
 841                 case DEV_CONFIG_APPLIED:
 842                         D(DEVICE, "Device '%s': config applied\n", dev->ifname);
 843                         config = blob_memdup(config);
 844                         free(dev->config);
 845                         dev->config = config;
 846                         if (change == DEV_CONFIG_RESTART && dev->present) {
 847                                 int ret = 0;
 848
 849                                 device_set_present(dev, false);
 850                                 if (dev->active && !dev->external) {
 851                                         ret = dev->set_state(dev, false);
 852                                         if (!ret)
 853                                                 ret = dev->set_state(dev, true);
 854                                 }
 855                                 if (!ret)
 856                                         device_set_present(dev, true);
 857                         }
 858                         break;
 859                 case DEV_CONFIG_NO_CHANGE:
 860                         D(DEVICE, "Device '%s': no configuration change\n", dev->ifname);
 861                         break;
 862                 case DEV_CONFIG_RECREATE:
 863                         break;
 864         }
 865
 866         return change;
 867 }
 868
 869 static void
 870 device_replace(struct device *dev, struct device *odev)
 871 {
 872         struct device_user *dep, *tmp;
 873
 874         __devlock++;
 875         if (odev->present)
 876                 device_set_present(odev, false);
 877
 878         list_for_each_entry_safe(dep, tmp, &odev->users.list, list.list) {
 879                 device_release(dep);
 880                 safe_list_del(&dep->list);
 881                 __device_add_user(dep, dev);
 882         }
 883         __devlock--;
 884
 885         device_free(odev);
 886 }
 887
 888 void
 889 device_reset_config(void)
 890 {
 891         struct device *dev;
 892
 893         avl_for_each_element(&devices, dev, avl)
 894                 dev->current_config = false;
 895 }
 896
 897 void
 898 device_reset_old(void)
 899 {
 900         struct device *dev, *tmp, *ndev;
 901
 902         avl_for_each_element_safe(&devices, dev, avl, tmp) {
 903                 if (dev->current_config || dev->default_config)
 904                         continue;
 905
 906                 if (dev->type != &simple_device_type)
 907                         continue;
 908
 909                 ndev = device_create_default(dev->ifname, dev->external);
 910                 if (!ndev)
 911                         continue;
 912
 913                 device_replace(ndev, dev);
 914         }
 915 }
 916
 917 void
 918 device_set_default_ps(bool state, int xps, int rps, int rps_flow_cnt)
 919 {
 920         struct device *dev;
 921
 922         if ((state == default_ps) && (default_rps_val == rps) &&
 923             (default_xps_val == xps) && (default_rps_flow_cnt == rps_flow_cnt))
 924                 return;
 925
 926         default_ps = state;
 927         default_rps_val = rps;
 928         default_rps_flow_cnt = rps_flow_cnt;
 929         default_xps_val = xps;
 930
 931         avl_for_each_element(&devices, dev, avl) {
 932                 struct device_settings *s = &dev->settings;
 933                 unsigned int apply_mask = 0;
 934
 935                 if (!(s->flags & DEV_OPT_RPS)) {
 936                         s->rps = default_ps;
 937                         s->rps_val = default_rps_val;
 938                         s->rps_flow_cnt = default_rps_flow_cnt;
 939                         apply_mask |= DEV_OPT_RPS;
 940                 }
 941
 942                 if (!(s->flags & DEV_OPT_XPS)) {
 943                         s->xps = default_ps;
 944                         s->xps_val = default_xps_val;
 945                         apply_mask |= DEV_OPT_XPS;
 946                 }
 947
 948                 if (!apply_mask)
 949                         continue;
 950
 951                 if (!(dev->external || (dev->present && dev->active)) ||
 952                                 dev->config_pending)
 953                         continue;
 954
 955                 system_if_apply_settings(dev, s, apply_mask);
 956         }
 957 }
 958
 959 struct device *
 960 device_create(const char *name, struct device_type *type,
 961               struct blob_attr *config)
 962 {
 963         struct device *odev = NULL, *dev;
 964         enum dev_change_type change;
 965
 966         odev = device_find(name);
 967         if (odev) {
 968                 odev->current_config = true;
 969                 change = device_apply_config(odev, type, config);
 970                 switch (change) {
 971                 case DEV_CONFIG_RECREATE:
 972                         D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
 973                         device_delete(odev);
 974                         break;
 975                 default:
 976                         return odev;
 977                 }
 978         } else
 979                 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
 980
 981         config = blob_memdup(config);
 982         if (!config)
 983                 return NULL;
 984
 985         dev = type->create(name, type, config);
 986         if (!dev)
 987                 return NULL;
 988
 989         dev->current_config = true;
 990         dev->config = config;
 991         if (odev)
 992                 device_replace(dev, odev);
 993
 994         if (!config_init && dev->config_pending) {
 995                 type->config_init(dev);
 996                 dev->config_pending = false;
 997         }
 998
 999         return dev;
1000 }
1001
1002 void
1003 device_dump_status(struct blob_buf *b, struct device *dev)
1004 {
1005         struct device_settings st;
1006         void *c, *s;
1007
1008         if (!dev) {
1009                 avl_for_each_element(&devices, dev, avl) {
1010                         if (!dev->present)
1011                                 continue;
1012                         c = blobmsg_open_table(b, dev->ifname);
1013                         device_dump_status(b, dev);
1014                         blobmsg_close_table(b, c);
1015                 }
1016
1017                 return;
1018         }
1019
1020         blobmsg_add_u8(b, "external", dev->external);
1021         blobmsg_add_u8(b, "present", dev->present);
1022         blobmsg_add_string(b, "type", dev->type->name);
1023
1024         if (!dev->present)
1025                 return;
1026
1027         blobmsg_add_u8(b, "up", !!dev->active);
1028         blobmsg_add_u8(b, "carrier", !!dev->link_active);
1029
1030         if (dev->type->dump_info)
1031                 dev->type->dump_info(dev, b);
1032         else
1033                 system_if_dump_info(dev, b);
1034
1035         if (dev->active) {
1036                 device_merge_settings(dev, &st);
1037                 if (st.flags & DEV_OPT_MTU)
1038                         blobmsg_add_u32(b, "mtu", st.mtu);
1039                 if (st.flags & DEV_OPT_MTU6)
1040                         blobmsg_add_u32(b, "mtu6", st.mtu6);
1041                 if (st.flags & DEV_OPT_MACADDR)
1042                         blobmsg_add_string(b, "macaddr", format_macaddr(st.macaddr));
1043                 if (st.flags & DEV_OPT_TXQUEUELEN)
1044                         blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
1045                 if (st.flags & DEV_OPT_IPV6)
1046                         blobmsg_add_u8(b, "ipv6", st.ipv6);
1047                 if (st.flags & DEV_OPT_PROMISC)
1048                         blobmsg_add_u8(b, "promisc", st.promisc);
1049                 if (st.flags & DEV_OPT_RPFILTER)
1050                         blobmsg_add_u32(b, "rpfilter", st.rpfilter);
1051                 if (st.flags & DEV_OPT_ACCEPTLOCAL)
1052                         blobmsg_add_u8(b, "acceptlocal", st.acceptlocal);
1053                 if (st.flags & DEV_OPT_IGMPVERSION)
1054                         blobmsg_add_u32(b, "igmpversion", st.igmpversion);
1055                 if (st.flags & DEV_OPT_MLDVERSION)
1056                         blobmsg_add_u32(b, "mldversion", st.mldversion);
1057                 if (st.flags & DEV_OPT_NEIGHREACHABLETIME) {
1058                         blobmsg_add_u32(b, "neigh4reachabletime", st.neigh4reachabletime);
1059                         blobmsg_add_u32(b, "neigh6reachabletime", st.neigh6reachabletime);
1060                 }
1061                 if (st.flags & DEV_OPT_NEIGHGCSTALETIME) {
1062                         blobmsg_add_u32(b, "neigh4gcstaletime", st.neigh4gcstaletime);
1063                         blobmsg_add_u32(b, "neigh6gcstaletime", st.neigh6gcstaletime);
1064                 }
1065                 if (st.flags & DEV_OPT_NEIGHLOCKTIME)
1066                         blobmsg_add_u32(b, "neigh4locktime", st.neigh4locktime);
1067                 if (st.flags & DEV_OPT_DADTRANSMITS)
1068                         blobmsg_add_u32(b, "dadtransmits", st.dadtransmits);
1069                 if (st.flags & DEV_OPT_MULTICAST_TO_UNICAST)
1070                         blobmsg_add_u8(b, "multicast_to_unicast", st.multicast_to_unicast);
1071                 if (st.flags & DEV_OPT_MULTICAST_ROUTER)
1072                         blobmsg_add_u32(b, "multicast_router", st.multicast_router);
1073                 if (st.flags & DEV_OPT_MULTICAST_FAST_LEAVE)
1074                         blobmsg_add_u8(b, "multicast_fast_leave", st.multicast_fast_leave);
1075                 if (st.flags & DEV_OPT_MULTICAST)
1076                         blobmsg_add_u8(b, "multicast", st.multicast);
1077                 if (st.flags & DEV_OPT_LEARNING)
1078                         blobmsg_add_u8(b, "learning", st.learning);
1079                 if (st.flags & DEV_OPT_UNICAST_FLOOD)
1080                         blobmsg_add_u8(b, "unicast_flood", st.unicast_flood);
1081                 if (st.flags & DEV_OPT_SENDREDIRECTS)
1082                         blobmsg_add_u8(b, "sendredirects", st.sendredirects);
1083         }
1084
1085         s = blobmsg_open_table(b, "statistics");
1086         if (dev->type->dump_stats)
1087                 dev->type->dump_stats(dev, b);
1088         else
1089                 system_if_dump_stats(dev, b);
1090         blobmsg_close_table(b, s);
1091 }
1092
1093 static void __init simple_device_type_init(void)
1094 {
1095         device_type_add(&simple_device_type);
1096 }