1/* 2 * Bridge netlink control interface 3 * 4 * Authors: 5 * Stephen Hemminger <shemminger@osdl.org> 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License 9 * as published by the Free Software Foundation; either version 10 * 2 of the License, or (at your option) any later version. 11 */ 12 13#include <linux/kernel.h> 14#include <linux/slab.h> 15#include <linux/etherdevice.h> 16#include <net/rtnetlink.h> 17#include <net/net_namespace.h> 18#include <net/sock.h> 19#include <net/switchdev.h> 20#include <uapi/linux/if_bridge.h> 21 22#include "br_private.h" 23#include "br_private_stp.h" 24 25static int br_get_num_vlan_infos(const struct net_port_vlans *pv, 26 u32 filter_mask) 27{ 28 u16 vid_range_start = 0, vid_range_end = 0; 29 u16 vid_range_flags = 0; 30 u16 pvid, vid, flags; 31 int num_vlans = 0; 32 33 if (filter_mask & RTEXT_FILTER_BRVLAN) 34 return pv->num_vlans; 35 36 if (!(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) 37 return 0; 38 39 /* Count number of vlan info's 40 */ 41 pvid = br_get_pvid(pv); 42 for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) { 43 flags = 0; 44 if (vid == pvid) 45 flags |= BRIDGE_VLAN_INFO_PVID; 46 47 if (test_bit(vid, pv->untagged_bitmap)) 48 flags |= BRIDGE_VLAN_INFO_UNTAGGED; 49 50 if (vid_range_start == 0) { 51 goto initvars; 52 } else if ((vid - vid_range_end) == 1 && 53 flags == vid_range_flags) { 54 vid_range_end = vid; 55 continue; 56 } else { 57 if ((vid_range_end - vid_range_start) > 0) 58 num_vlans += 2; 59 else 60 num_vlans += 1; 61 } 62initvars: 63 vid_range_start = vid; 64 vid_range_end = vid; 65 vid_range_flags = flags; 66 } 67 68 if (vid_range_start != 0) { 69 if ((vid_range_end - vid_range_start) > 0) 70 num_vlans += 2; 71 else 72 num_vlans += 1; 73 } 74 75 return num_vlans; 76} 77 78static size_t br_get_link_af_size_filtered(const struct net_device *dev, 79 u32 filter_mask) 80{ 81 struct net_port_vlans *pv; 82 int num_vlan_infos; 83 84 rcu_read_lock(); 85 if (br_port_exists(dev)) 86 pv = nbp_get_vlan_info(br_port_get_rcu(dev)); 87 else if (dev->priv_flags & IFF_EBRIDGE) 88 pv = br_get_vlan_info((struct net_bridge *)netdev_priv(dev)); 89 else 90 pv = NULL; 91 if (pv) 92 num_vlan_infos = br_get_num_vlan_infos(pv, filter_mask); 93 else 94 num_vlan_infos = 0; 95 rcu_read_unlock(); 96 97 if (!num_vlan_infos) 98 return 0; 99 100 /* Each VLAN is returned in bridge_vlan_info along with flags */ 101 return num_vlan_infos * nla_total_size(sizeof(struct bridge_vlan_info)); 102} 103 104static inline size_t br_port_info_size(void) 105{ 106 return nla_total_size(1) /* IFLA_BRPORT_STATE */ 107 + nla_total_size(2) /* IFLA_BRPORT_PRIORITY */ 108 + nla_total_size(4) /* IFLA_BRPORT_COST */ 109 + nla_total_size(1) /* IFLA_BRPORT_MODE */ 110 + nla_total_size(1) /* IFLA_BRPORT_GUARD */ 111 + nla_total_size(1) /* IFLA_BRPORT_PROTECT */ 112 + nla_total_size(1) /* IFLA_BRPORT_FAST_LEAVE */ 113 + nla_total_size(1) /* IFLA_BRPORT_LEARNING */ 114 + nla_total_size(1) /* IFLA_BRPORT_UNICAST_FLOOD */ 115 + nla_total_size(1) /* IFLA_BRPORT_PROXYARP */ 116 + nla_total_size(1) /* IFLA_BRPORT_PROXYARP_WIFI */ 117 + 0; 118} 119 120static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask) 121{ 122 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 123 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 124 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 125 + nla_total_size(4) /* IFLA_MASTER */ 126 + nla_total_size(4) /* IFLA_MTU */ 127 + nla_total_size(4) /* IFLA_LINK */ 128 + nla_total_size(1) /* IFLA_OPERSTATE */ 129 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */ 130 + nla_total_size(br_get_link_af_size_filtered(dev, 131 filter_mask)); /* IFLA_AF_SPEC */ 132} 133 134static int br_port_fill_attrs(struct sk_buff *skb, 135 const struct net_bridge_port *p) 136{ 137 u8 mode = !!(p->flags & BR_HAIRPIN_MODE); 138 139 if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) || 140 nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) || 141 nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) || 142 nla_put_u8(skb, IFLA_BRPORT_MODE, mode) || 143 nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) || 144 nla_put_u8(skb, IFLA_BRPORT_PROTECT, !!(p->flags & BR_ROOT_BLOCK)) || 145 nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, !!(p->flags & BR_MULTICAST_FAST_LEAVE)) || 146 nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) || 147 nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD, !!(p->flags & BR_FLOOD)) || 148 nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) || 149 nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI, 150 !!(p->flags & BR_PROXYARP_WIFI))) 151 return -EMSGSIZE; 152 153 return 0; 154} 155 156static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start, 157 u16 vid_end, u16 flags) 158{ 159 struct bridge_vlan_info vinfo; 160 161 if ((vid_end - vid_start) > 0) { 162 /* add range to skb */ 163 vinfo.vid = vid_start; 164 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN; 165 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, 166 sizeof(vinfo), &vinfo)) 167 goto nla_put_failure; 168 169 vinfo.flags &= ~BRIDGE_VLAN_INFO_RANGE_BEGIN; 170 171 vinfo.vid = vid_end; 172 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END; 173 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, 174 sizeof(vinfo), &vinfo)) 175 goto nla_put_failure; 176 } else { 177 vinfo.vid = vid_start; 178 vinfo.flags = flags; 179 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, 180 sizeof(vinfo), &vinfo)) 181 goto nla_put_failure; 182 } 183 184 return 0; 185 186nla_put_failure: 187 return -EMSGSIZE; 188} 189 190static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb, 191 const struct net_port_vlans *pv) 192{ 193 u16 vid_range_start = 0, vid_range_end = 0; 194 u16 vid_range_flags = 0; 195 u16 pvid, vid, flags; 196 int err = 0; 197 198 /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan 199 * and mark vlan info with begin and end flags 200 * if vlaninfo represents a range 201 */ 202 pvid = br_get_pvid(pv); 203 for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) { 204 flags = 0; 205 if (vid == pvid) 206 flags |= BRIDGE_VLAN_INFO_PVID; 207 208 if (test_bit(vid, pv->untagged_bitmap)) 209 flags |= BRIDGE_VLAN_INFO_UNTAGGED; 210 211 if (vid_range_start == 0) { 212 goto initvars; 213 } else if ((vid - vid_range_end) == 1 && 214 flags == vid_range_flags) { 215 vid_range_end = vid; 216 continue; 217 } else { 218 err = br_fill_ifvlaninfo_range(skb, vid_range_start, 219 vid_range_end, 220 vid_range_flags); 221 if (err) 222 return err; 223 } 224 225initvars: 226 vid_range_start = vid; 227 vid_range_end = vid; 228 vid_range_flags = flags; 229 } 230 231 if (vid_range_start != 0) { 232 /* Call it once more to send any left over vlans */ 233 err = br_fill_ifvlaninfo_range(skb, vid_range_start, 234 vid_range_end, 235 vid_range_flags); 236 if (err) 237 return err; 238 } 239 240 return 0; 241} 242 243static int br_fill_ifvlaninfo(struct sk_buff *skb, 244 const struct net_port_vlans *pv) 245{ 246 struct bridge_vlan_info vinfo; 247 u16 pvid, vid; 248 249 pvid = br_get_pvid(pv); 250 for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) { 251 vinfo.vid = vid; 252 vinfo.flags = 0; 253 if (vid == pvid) 254 vinfo.flags |= BRIDGE_VLAN_INFO_PVID; 255 256 if (test_bit(vid, pv->untagged_bitmap)) 257 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED; 258 259 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, 260 sizeof(vinfo), &vinfo)) 261 goto nla_put_failure; 262 } 263 264 return 0; 265 266nla_put_failure: 267 return -EMSGSIZE; 268} 269 270/* 271 * Create one netlink message for one interface 272 * Contains port and master info as well as carrier and bridge state. 273 */ 274static int br_fill_ifinfo(struct sk_buff *skb, 275 const struct net_bridge_port *port, 276 u32 pid, u32 seq, int event, unsigned int flags, 277 u32 filter_mask, const struct net_device *dev) 278{ 279 const struct net_bridge *br; 280 struct ifinfomsg *hdr; 281 struct nlmsghdr *nlh; 282 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN; 283 284 if (port) 285 br = port->br; 286 else 287 br = netdev_priv(dev); 288 289 br_debug(br, "br_fill_info event %d port %s master %s\n", 290 event, dev->name, br->dev->name); 291 292 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); 293 if (nlh == NULL) 294 return -EMSGSIZE; 295 296 hdr = nlmsg_data(nlh); 297 hdr->ifi_family = AF_BRIDGE; 298 hdr->__ifi_pad = 0; 299 hdr->ifi_type = dev->type; 300 hdr->ifi_index = dev->ifindex; 301 hdr->ifi_flags = dev_get_flags(dev); 302 hdr->ifi_change = 0; 303 304 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 305 nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) || 306 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 307 nla_put_u8(skb, IFLA_OPERSTATE, operstate) || 308 (dev->addr_len && 309 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || 310 (dev->ifindex != dev_get_iflink(dev) && 311 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev)))) 312 goto nla_put_failure; 313 314 if (event == RTM_NEWLINK && port) { 315 struct nlattr *nest 316 = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED); 317 318 if (nest == NULL || br_port_fill_attrs(skb, port) < 0) 319 goto nla_put_failure; 320 nla_nest_end(skb, nest); 321 } 322 323 /* Check if the VID information is requested */ 324 if ((filter_mask & RTEXT_FILTER_BRVLAN) || 325 (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) { 326 const struct net_port_vlans *pv; 327 struct nlattr *af; 328 int err; 329 330 if (port) 331 pv = nbp_get_vlan_info(port); 332 else 333 pv = br_get_vlan_info(br); 334 335 if (!pv || bitmap_empty(pv->vlan_bitmap, VLAN_N_VID)) 336 goto done; 337 338 af = nla_nest_start(skb, IFLA_AF_SPEC); 339 if (!af) 340 goto nla_put_failure; 341 342 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) 343 err = br_fill_ifvlaninfo_compressed(skb, pv); 344 else 345 err = br_fill_ifvlaninfo(skb, pv); 346 if (err) 347 goto nla_put_failure; 348 nla_nest_end(skb, af); 349 } 350 351done: 352 nlmsg_end(skb, nlh); 353 return 0; 354 355nla_put_failure: 356 nlmsg_cancel(skb, nlh); 357 return -EMSGSIZE; 358} 359 360/* 361 * Notify listeners of a change in port information 362 */ 363void br_ifinfo_notify(int event, struct net_bridge_port *port) 364{ 365 struct net *net; 366 struct sk_buff *skb; 367 int err = -ENOBUFS; 368 u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED; 369 370 if (!port) 371 return; 372 373 net = dev_net(port->dev); 374 br_debug(port->br, "port %u(%s) event %d\n", 375 (unsigned int)port->port_no, port->dev->name, event); 376 377 skb = nlmsg_new(br_nlmsg_size(port->dev, filter), GFP_ATOMIC); 378 if (skb == NULL) 379 goto errout; 380 381 err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, port->dev); 382 if (err < 0) { 383 /* -EMSGSIZE implies BUG in br_nlmsg_size() */ 384 WARN_ON(err == -EMSGSIZE); 385 kfree_skb(skb); 386 goto errout; 387 } 388 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); 389 return; 390errout: 391 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 392} 393 394 395/* 396 * Dump information about all ports, in response to GETLINK 397 */ 398int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, 399 struct net_device *dev, u32 filter_mask, int nlflags) 400{ 401 struct net_bridge_port *port = br_port_get_rtnl(dev); 402 403 if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) && 404 !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) 405 return 0; 406 407 return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags, 408 filter_mask, dev); 409} 410 411static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p, 412 int cmd, struct bridge_vlan_info *vinfo) 413{ 414 int err = 0; 415 416 switch (cmd) { 417 case RTM_SETLINK: 418 if (p) { 419 err = nbp_vlan_add(p, vinfo->vid, vinfo->flags); 420 if (err) 421 break; 422 423 if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER) 424 err = br_vlan_add(p->br, vinfo->vid, 425 vinfo->flags); 426 } else { 427 err = br_vlan_add(br, vinfo->vid, vinfo->flags); 428 } 429 break; 430 431 case RTM_DELLINK: 432 if (p) { 433 nbp_vlan_delete(p, vinfo->vid); 434 if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER) 435 br_vlan_delete(p->br, vinfo->vid); 436 } else { 437 br_vlan_delete(br, vinfo->vid); 438 } 439 break; 440 } 441 442 return err; 443} 444 445static int br_afspec(struct net_bridge *br, 446 struct net_bridge_port *p, 447 struct nlattr *af_spec, 448 int cmd) 449{ 450 struct bridge_vlan_info *vinfo_start = NULL; 451 struct bridge_vlan_info *vinfo = NULL; 452 struct nlattr *attr; 453 int err = 0; 454 int rem; 455 456 nla_for_each_nested(attr, af_spec, rem) { 457 if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO) 458 continue; 459 if (nla_len(attr) != sizeof(struct bridge_vlan_info)) 460 return -EINVAL; 461 vinfo = nla_data(attr); 462 if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 463 if (vinfo_start) 464 return -EINVAL; 465 vinfo_start = vinfo; 466 continue; 467 } 468 469 if (vinfo_start) { 470 struct bridge_vlan_info tmp_vinfo; 471 int v; 472 473 if (!(vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END)) 474 return -EINVAL; 475 476 if (vinfo->vid <= vinfo_start->vid) 477 return -EINVAL; 478 479 memcpy(&tmp_vinfo, vinfo_start, 480 sizeof(struct bridge_vlan_info)); 481 482 for (v = vinfo_start->vid; v <= vinfo->vid; v++) { 483 tmp_vinfo.vid = v; 484 err = br_vlan_info(br, p, cmd, &tmp_vinfo); 485 if (err) 486 break; 487 } 488 vinfo_start = NULL; 489 } else { 490 err = br_vlan_info(br, p, cmd, vinfo); 491 } 492 if (err) 493 break; 494 } 495 496 return err; 497} 498 499static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = { 500 [IFLA_BRPORT_STATE] = { .type = NLA_U8 }, 501 [IFLA_BRPORT_COST] = { .type = NLA_U32 }, 502 [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 }, 503 [IFLA_BRPORT_MODE] = { .type = NLA_U8 }, 504 [IFLA_BRPORT_GUARD] = { .type = NLA_U8 }, 505 [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 }, 506 [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 }, 507 [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 }, 508 [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 }, 509 [IFLA_BRPORT_PROXYARP] = { .type = NLA_U8 }, 510 [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 }, 511}; 512 513/* Change the state of the port and notify spanning tree */ 514static int br_set_port_state(struct net_bridge_port *p, u8 state) 515{ 516 if (state > BR_STATE_BLOCKING) 517 return -EINVAL; 518 519 /* if kernel STP is running, don't allow changes */ 520 if (p->br->stp_enabled == BR_KERNEL_STP) 521 return -EBUSY; 522 523 /* if device is not up, change is not allowed 524 * if link is not present, only allowable state is disabled 525 */ 526 if (!netif_running(p->dev) || 527 (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED)) 528 return -ENETDOWN; 529 530 br_set_state(p, state); 531 br_log_state(p); 532 br_port_state_selection(p->br); 533 return 0; 534} 535 536/* Set/clear or port flags based on attribute */ 537static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[], 538 int attrtype, unsigned long mask) 539{ 540 if (tb[attrtype]) { 541 u8 flag = nla_get_u8(tb[attrtype]); 542 if (flag) 543 p->flags |= mask; 544 else 545 p->flags &= ~mask; 546 } 547} 548 549/* Process bridge protocol info on port */ 550static int br_setport(struct net_bridge_port *p, struct nlattr *tb[]) 551{ 552 int err; 553 unsigned long old_flags = p->flags; 554 555 br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE); 556 br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD); 557 br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE); 558 br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK); 559 br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING); 560 br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD); 561 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP); 562 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI); 563 564 if (tb[IFLA_BRPORT_COST]) { 565 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST])); 566 if (err) 567 return err; 568 } 569 570 if (tb[IFLA_BRPORT_PRIORITY]) { 571 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY])); 572 if (err) 573 return err; 574 } 575 576 if (tb[IFLA_BRPORT_STATE]) { 577 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE])); 578 if (err) 579 return err; 580 } 581 582 br_port_flags_change(p, old_flags ^ p->flags); 583 return 0; 584} 585 586/* Change state and parameters on port. */ 587int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags) 588{ 589 struct nlattr *protinfo; 590 struct nlattr *afspec; 591 struct net_bridge_port *p; 592 struct nlattr *tb[IFLA_BRPORT_MAX + 1]; 593 int err = 0, ret_offload = 0; 594 595 protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO); 596 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 597 if (!protinfo && !afspec) 598 return 0; 599 600 p = br_port_get_rtnl(dev); 601 /* We want to accept dev as bridge itself if the AF_SPEC 602 * is set to see if someone is setting vlan info on the bridge 603 */ 604 if (!p && !afspec) 605 return -EINVAL; 606 607 if (p && protinfo) { 608 if (protinfo->nla_type & NLA_F_NESTED) { 609 err = nla_parse_nested(tb, IFLA_BRPORT_MAX, 610 protinfo, br_port_policy); 611 if (err) 612 return err; 613 614 spin_lock_bh(&p->br->lock); 615 err = br_setport(p, tb); 616 spin_unlock_bh(&p->br->lock); 617 } else { 618 /* Binary compatibility with old RSTP */ 619 if (nla_len(protinfo) < sizeof(u8)) 620 return -EINVAL; 621 622 spin_lock_bh(&p->br->lock); 623 err = br_set_port_state(p, nla_get_u8(protinfo)); 624 spin_unlock_bh(&p->br->lock); 625 } 626 if (err) 627 goto out; 628 } 629 630 if (afspec) { 631 err = br_afspec((struct net_bridge *)netdev_priv(dev), p, 632 afspec, RTM_SETLINK); 633 } 634 635 if (p && !(flags & BRIDGE_FLAGS_SELF)) { 636 /* set bridge attributes in hardware if supported 637 */ 638 ret_offload = netdev_switch_port_bridge_setlink(dev, nlh, 639 flags); 640 if (ret_offload && ret_offload != -EOPNOTSUPP) 641 br_warn(p->br, "error setting attrs on port %u(%s)\n", 642 (unsigned int)p->port_no, p->dev->name); 643 } 644 645 if (err == 0) 646 br_ifinfo_notify(RTM_NEWLINK, p); 647out: 648 return err; 649} 650 651/* Delete port information */ 652int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags) 653{ 654 struct nlattr *afspec; 655 struct net_bridge_port *p; 656 int err = 0, ret_offload = 0; 657 658 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 659 if (!afspec) 660 return 0; 661 662 p = br_port_get_rtnl(dev); 663 /* We want to accept dev as bridge itself as well */ 664 if (!p && !(dev->priv_flags & IFF_EBRIDGE)) 665 return -EINVAL; 666 667 err = br_afspec((struct net_bridge *)netdev_priv(dev), p, 668 afspec, RTM_DELLINK); 669 if (err == 0) 670 /* Send RTM_NEWLINK because userspace 671 * expects RTM_NEWLINK for vlan dels 672 */ 673 br_ifinfo_notify(RTM_NEWLINK, p); 674 675 if (p && !(flags & BRIDGE_FLAGS_SELF)) { 676 /* del bridge attributes in hardware 677 */ 678 ret_offload = netdev_switch_port_bridge_dellink(dev, nlh, 679 flags); 680 if (ret_offload && ret_offload != -EOPNOTSUPP) 681 br_warn(p->br, "error deleting attrs on port %u (%s)\n", 682 (unsigned int)p->port_no, p->dev->name); 683 } 684 685 return err; 686} 687static int br_validate(struct nlattr *tb[], struct nlattr *data[]) 688{ 689 if (tb[IFLA_ADDRESS]) { 690 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) 691 return -EINVAL; 692 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) 693 return -EADDRNOTAVAIL; 694 } 695 696 return 0; 697} 698 699static int br_dev_newlink(struct net *src_net, struct net_device *dev, 700 struct nlattr *tb[], struct nlattr *data[]) 701{ 702 struct net_bridge *br = netdev_priv(dev); 703 704 if (tb[IFLA_ADDRESS]) { 705 spin_lock_bh(&br->lock); 706 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS])); 707 spin_unlock_bh(&br->lock); 708 } 709 710 return register_netdevice(dev); 711} 712 713static int br_port_slave_changelink(struct net_device *brdev, 714 struct net_device *dev, 715 struct nlattr *tb[], 716 struct nlattr *data[]) 717{ 718 struct net_bridge *br = netdev_priv(brdev); 719 int ret; 720 721 if (!data) 722 return 0; 723 724 spin_lock_bh(&br->lock); 725 ret = br_setport(br_port_get_rtnl(dev), data); 726 spin_unlock_bh(&br->lock); 727 728 return ret; 729} 730 731static int br_port_fill_slave_info(struct sk_buff *skb, 732 const struct net_device *brdev, 733 const struct net_device *dev) 734{ 735 return br_port_fill_attrs(skb, br_port_get_rtnl(dev)); 736} 737 738static size_t br_port_get_slave_size(const struct net_device *brdev, 739 const struct net_device *dev) 740{ 741 return br_port_info_size(); 742} 743 744static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = { 745 [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 }, 746 [IFLA_BR_HELLO_TIME] = { .type = NLA_U32 }, 747 [IFLA_BR_MAX_AGE] = { .type = NLA_U32 }, 748 [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 }, 749 [IFLA_BR_STP_STATE] = { .type = NLA_U32 }, 750 [IFLA_BR_PRIORITY] = { .type = NLA_U16 }, 751}; 752 753static int br_changelink(struct net_device *brdev, struct nlattr *tb[], 754 struct nlattr *data[]) 755{ 756 struct net_bridge *br = netdev_priv(brdev); 757 int err; 758 759 if (!data) 760 return 0; 761 762 if (data[IFLA_BR_FORWARD_DELAY]) { 763 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY])); 764 if (err) 765 return err; 766 } 767 768 if (data[IFLA_BR_HELLO_TIME]) { 769 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME])); 770 if (err) 771 return err; 772 } 773 774 if (data[IFLA_BR_MAX_AGE]) { 775 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE])); 776 if (err) 777 return err; 778 } 779 780 if (data[IFLA_BR_AGEING_TIME]) { 781 u32 ageing_time = nla_get_u32(data[IFLA_BR_AGEING_TIME]); 782 783 br->ageing_time = clock_t_to_jiffies(ageing_time); 784 } 785 786 if (data[IFLA_BR_STP_STATE]) { 787 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]); 788 789 br_stp_set_enabled(br, stp_enabled); 790 } 791 792 if (data[IFLA_BR_PRIORITY]) { 793 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]); 794 795 br_stp_set_bridge_priority(br, priority); 796 } 797 798 return 0; 799} 800 801static size_t br_get_size(const struct net_device *brdev) 802{ 803 return nla_total_size(sizeof(u32)) + /* IFLA_BR_FORWARD_DELAY */ 804 nla_total_size(sizeof(u32)) + /* IFLA_BR_HELLO_TIME */ 805 nla_total_size(sizeof(u32)) + /* IFLA_BR_MAX_AGE */ 806 nla_total_size(sizeof(u32)) + /* IFLA_BR_AGEING_TIME */ 807 nla_total_size(sizeof(u32)) + /* IFLA_BR_STP_STATE */ 808 nla_total_size(sizeof(u16)) + /* IFLA_BR_PRIORITY */ 809 0; 810} 811 812static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev) 813{ 814 struct net_bridge *br = netdev_priv(brdev); 815 u32 forward_delay = jiffies_to_clock_t(br->forward_delay); 816 u32 hello_time = jiffies_to_clock_t(br->hello_time); 817 u32 age_time = jiffies_to_clock_t(br->max_age); 818 u32 ageing_time = jiffies_to_clock_t(br->ageing_time); 819 u32 stp_enabled = br->stp_enabled; 820 u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]; 821 822 if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) || 823 nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) || 824 nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) || 825 nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) || 826 nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) || 827 nla_put_u16(skb, IFLA_BR_PRIORITY, priority)) 828 return -EMSGSIZE; 829 830 return 0; 831} 832 833static size_t br_get_link_af_size(const struct net_device *dev) 834{ 835 struct net_port_vlans *pv; 836 837 if (br_port_exists(dev)) 838 pv = nbp_get_vlan_info(br_port_get_rtnl(dev)); 839 else if (dev->priv_flags & IFF_EBRIDGE) 840 pv = br_get_vlan_info((struct net_bridge *)netdev_priv(dev)); 841 else 842 return 0; 843 844 if (!pv) 845 return 0; 846 847 /* Each VLAN is returned in bridge_vlan_info along with flags */ 848 return pv->num_vlans * nla_total_size(sizeof(struct bridge_vlan_info)); 849} 850 851static struct rtnl_af_ops br_af_ops __read_mostly = { 852 .family = AF_BRIDGE, 853 .get_link_af_size = br_get_link_af_size, 854}; 855 856struct rtnl_link_ops br_link_ops __read_mostly = { 857 .kind = "bridge", 858 .priv_size = sizeof(struct net_bridge), 859 .setup = br_dev_setup, 860 .maxtype = IFLA_BRPORT_MAX, 861 .policy = br_policy, 862 .validate = br_validate, 863 .newlink = br_dev_newlink, 864 .changelink = br_changelink, 865 .dellink = br_dev_delete, 866 .get_size = br_get_size, 867 .fill_info = br_fill_info, 868 869 .slave_maxtype = IFLA_BRPORT_MAX, 870 .slave_policy = br_port_policy, 871 .slave_changelink = br_port_slave_changelink, 872 .get_slave_size = br_port_get_slave_size, 873 .fill_slave_info = br_port_fill_slave_info, 874}; 875 876int __init br_netlink_init(void) 877{ 878 int err; 879 880 br_mdb_init(); 881 rtnl_af_register(&br_af_ops); 882 883 err = rtnl_link_register(&br_link_ops); 884 if (err) 885 goto out_af; 886 887 return 0; 888 889out_af: 890 rtnl_af_unregister(&br_af_ops); 891 br_mdb_uninit(); 892 return err; 893} 894 895void br_netlink_fini(void) 896{ 897 br_mdb_uninit(); 898 rtnl_af_unregister(&br_af_ops); 899 rtnl_link_unregister(&br_link_ops); 900} 901