1 // SPDX-License-Identifier: GPL-2.0-only 2 // Copyright (c) 2020, Nikolay Aleksandrov <nikolay@cumulusnetworks.com> 3 #include <linux/kernel.h> 4 #include <linux/netdevice.h> 5 #include <linux/rtnetlink.h> 6 #include <linux/slab.h> 7 #include <net/ip_tunnels.h> 8 9 #include "br_private.h" 10 #include "br_private_tunnel.h" 11 12 static bool __vlan_tun_put(struct sk_buff *skb, const struct net_bridge_vlan *v) 13 { 14 __be32 tid = tunnel_id_to_key32(v->tinfo.tunnel_id); 15 struct nlattr *nest; 16 17 if (!v->tinfo.tunnel_dst) 18 return true; 19 20 nest = nla_nest_start(skb, BRIDGE_VLANDB_ENTRY_TUNNEL_INFO); 21 if (!nest) 22 return false; 23 if (nla_put_u32(skb, BRIDGE_VLANDB_TINFO_ID, be32_to_cpu(tid))) { 24 nla_nest_cancel(skb, nest); 25 return false; 26 } 27 nla_nest_end(skb, nest); 28 29 return true; 30 } 31 32 static bool __vlan_tun_can_enter_range(const struct net_bridge_vlan *v_curr, 33 const struct net_bridge_vlan *range_end) 34 { 35 return (!v_curr->tinfo.tunnel_dst && !range_end->tinfo.tunnel_dst) || 36 vlan_tunid_inrange(v_curr, range_end); 37 } 38 39 /* check if the options' state of v_curr allow it to enter the range */ 40 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 41 const struct net_bridge_vlan *range_end) 42 { 43 u8 range_mc_rtr = br_vlan_multicast_router(range_end); 44 u8 curr_mc_rtr = br_vlan_multicast_router(v_curr); 45 46 if (v_curr->state != range_end->state) 47 return false; 48 49 if (!__vlan_tun_can_enter_range(v_curr, range_end)) 50 return false; 51 52 if (curr_mc_rtr != range_mc_rtr) 53 return false; 54 55 /* Check user-visible priv_flags that affect output */ 56 if ((v_curr->priv_flags ^ range_end->priv_flags) & 57 (BR_VLFLAG_NEIGH_SUPPRESS_ENABLED | BR_VLFLAG_MCAST_ENABLED | 58 BR_VLFLAG_NEIGH_FORWARD_GRAT_ENABLED)) 59 return false; 60 61 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 62 if (!br_vlan_is_master(v_curr) && 63 !br_multicast_port_ctx_vlan_disabled(&v_curr->port_mcast_ctx) && 64 !br_multicast_port_ctx_options_equal(&v_curr->port_mcast_ctx, 65 &range_end->port_mcast_ctx)) 66 return false; 67 #endif 68 69 return true; 70 } 71 72 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v, 73 const struct net_bridge_port *p) 74 { 75 if (nla_put_u8(skb, BRIDGE_VLANDB_ENTRY_STATE, br_vlan_get_state(v)) || 76 !__vlan_tun_put(skb, v) || 77 nla_put_u8(skb, BRIDGE_VLANDB_ENTRY_NEIGH_SUPPRESS, 78 !!(v->priv_flags & BR_VLFLAG_NEIGH_SUPPRESS_ENABLED)) || 79 nla_put_u8(skb, BRIDGE_VLANDB_ENTRY_NEIGH_FORWARD_GRAT, 80 !!(v->priv_flags & BR_VLFLAG_NEIGH_FORWARD_GRAT_ENABLED))) 81 return false; 82 83 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 84 if (nla_put_u8(skb, BRIDGE_VLANDB_ENTRY_MCAST_ROUTER, 85 br_vlan_multicast_router(v))) 86 return false; 87 if (p && !br_multicast_port_ctx_vlan_disabled(&v->port_mcast_ctx) && 88 (nla_put_u32(skb, BRIDGE_VLANDB_ENTRY_MCAST_N_GROUPS, 89 br_multicast_ngroups_get(&v->port_mcast_ctx)) || 90 nla_put_u32(skb, BRIDGE_VLANDB_ENTRY_MCAST_MAX_GROUPS, 91 br_multicast_ngroups_get_max(&v->port_mcast_ctx)))) 92 return false; 93 #endif 94 95 return true; 96 } 97 98 size_t br_vlan_opts_nl_size(void) 99 { 100 return nla_total_size(sizeof(u8)) /* BRIDGE_VLANDB_ENTRY_STATE */ 101 + nla_total_size(0) /* BRIDGE_VLANDB_ENTRY_TUNNEL_INFO */ 102 + nla_total_size(sizeof(u32)) /* BRIDGE_VLANDB_TINFO_ID */ 103 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 104 + nla_total_size(sizeof(u8)) /* BRIDGE_VLANDB_ENTRY_MCAST_ROUTER */ 105 + nla_total_size(sizeof(u32)) /* BRIDGE_VLANDB_ENTRY_MCAST_N_GROUPS */ 106 + nla_total_size(sizeof(u32)) /* BRIDGE_VLANDB_ENTRY_MCAST_MAX_GROUPS */ 107 #endif 108 + nla_total_size(sizeof(u8)) /* BRIDGE_VLANDB_ENTRY_NEIGH_SUPPRESS */ 109 + nla_total_size(sizeof(u8)) /* BRIDGE_VLANDB_ENTRY_NEIGH_FORWARD_GRAT */ 110 + 0; 111 } 112 113 static int br_vlan_modify_state(struct net_bridge_vlan_group *vg, 114 struct net_bridge_vlan *v, 115 u8 state, 116 bool *changed, 117 struct netlink_ext_ack *extack) 118 { 119 struct net_bridge *br; 120 121 ASSERT_RTNL(); 122 123 if (state > BR_STATE_BLOCKING) { 124 NL_SET_ERR_MSG_MOD(extack, "Invalid vlan state"); 125 return -EINVAL; 126 } 127 128 if (br_vlan_is_brentry(v)) 129 br = v->br; 130 else 131 br = v->port->br; 132 133 if (br->stp_enabled == BR_KERNEL_STP) { 134 NL_SET_ERR_MSG_MOD(extack, "Can't modify vlan state when using kernel STP"); 135 return -EBUSY; 136 } 137 138 if (br_opt_get(br, BROPT_MST_ENABLED)) { 139 NL_SET_ERR_MSG_MOD(extack, "Can't modify vlan state directly when MST is enabled"); 140 return -EBUSY; 141 } 142 143 if (v->state == state) 144 return 0; 145 146 if (v->vid == br_get_pvid(vg)) 147 br_vlan_set_pvid_state(vg, state); 148 149 br_vlan_set_state(v, state); 150 *changed = true; 151 152 return 0; 153 } 154 155 static const struct nla_policy br_vlandb_tinfo_pol[BRIDGE_VLANDB_TINFO_MAX + 1] = { 156 [BRIDGE_VLANDB_TINFO_ID] = { .type = NLA_U32 }, 157 [BRIDGE_VLANDB_TINFO_CMD] = { .type = NLA_U32 }, 158 }; 159 160 static int br_vlan_modify_tunnel(const struct net_bridge_port *p, 161 struct net_bridge_vlan *v, 162 struct nlattr **tb, 163 bool *changed, 164 struct netlink_ext_ack *extack) 165 { 166 struct nlattr *tun_tb[BRIDGE_VLANDB_TINFO_MAX + 1], *attr; 167 struct bridge_vlan_info *vinfo; 168 u32 tun_id = 0; 169 int cmd, err; 170 171 if (!p) { 172 NL_SET_ERR_MSG_MOD(extack, "Can't modify tunnel mapping of non-port vlans"); 173 return -EINVAL; 174 } 175 if (!test_bit(BR_VLAN_TUNNEL_BIT, &p->flags)) { 176 NL_SET_ERR_MSG_MOD(extack, "Port doesn't have tunnel flag set"); 177 return -EINVAL; 178 } 179 180 attr = tb[BRIDGE_VLANDB_ENTRY_TUNNEL_INFO]; 181 err = nla_parse_nested(tun_tb, BRIDGE_VLANDB_TINFO_MAX, attr, 182 br_vlandb_tinfo_pol, extack); 183 if (err) 184 return err; 185 186 if (!tun_tb[BRIDGE_VLANDB_TINFO_CMD]) { 187 NL_SET_ERR_MSG_MOD(extack, "Missing tunnel command attribute"); 188 return -ENOENT; 189 } 190 cmd = nla_get_u32(tun_tb[BRIDGE_VLANDB_TINFO_CMD]); 191 switch (cmd) { 192 case RTM_SETLINK: 193 if (!tun_tb[BRIDGE_VLANDB_TINFO_ID]) { 194 NL_SET_ERR_MSG_MOD(extack, "Missing tunnel id attribute"); 195 return -ENOENT; 196 } 197 /* when working on vlan ranges this is the starting tunnel id */ 198 tun_id = nla_get_u32(tun_tb[BRIDGE_VLANDB_TINFO_ID]); 199 /* vlan info attr is guaranteed by br_vlan_rtm_process_one */ 200 vinfo = nla_data(tb[BRIDGE_VLANDB_ENTRY_INFO]); 201 /* tunnel ids are mapped to each vlan in increasing order, 202 * the starting vlan is in BRIDGE_VLANDB_ENTRY_INFO and v is the 203 * current vlan, so we compute: tun_id + v - vinfo->vid 204 */ 205 tun_id += v->vid - vinfo->vid; 206 break; 207 case RTM_DELLINK: 208 break; 209 default: 210 NL_SET_ERR_MSG_MOD(extack, "Unsupported tunnel command"); 211 return -EINVAL; 212 } 213 214 return br_vlan_tunnel_info(p, cmd, v->vid, tun_id, changed); 215 } 216 217 static int br_vlan_process_one_opts(const struct net_bridge *br, 218 const struct net_bridge_port *p, 219 struct net_bridge_vlan_group *vg, 220 struct net_bridge_vlan *v, 221 struct nlattr **tb, 222 bool *changed, 223 struct netlink_ext_ack *extack) 224 { 225 int err; 226 227 *changed = false; 228 if (tb[BRIDGE_VLANDB_ENTRY_STATE]) { 229 u8 state = nla_get_u8(tb[BRIDGE_VLANDB_ENTRY_STATE]); 230 231 err = br_vlan_modify_state(vg, v, state, changed, extack); 232 if (err) 233 return err; 234 } 235 if (tb[BRIDGE_VLANDB_ENTRY_TUNNEL_INFO]) { 236 err = br_vlan_modify_tunnel(p, v, tb, changed, extack); 237 if (err) 238 return err; 239 } 240 241 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 242 if (tb[BRIDGE_VLANDB_ENTRY_MCAST_ROUTER]) { 243 u8 val; 244 245 val = nla_get_u8(tb[BRIDGE_VLANDB_ENTRY_MCAST_ROUTER]); 246 err = br_multicast_set_vlan_router(v, val); 247 if (err) 248 return err; 249 *changed = true; 250 } 251 if (tb[BRIDGE_VLANDB_ENTRY_MCAST_MAX_GROUPS]) { 252 u32 val; 253 254 if (!p) { 255 NL_SET_ERR_MSG_MOD(extack, "Can't set mcast_max_groups for non-port vlans"); 256 return -EINVAL; 257 } 258 if (br_multicast_port_ctx_vlan_disabled(&v->port_mcast_ctx)) { 259 NL_SET_ERR_MSG_MOD(extack, "Multicast snooping disabled on this VLAN"); 260 return -EINVAL; 261 } 262 263 val = nla_get_u32(tb[BRIDGE_VLANDB_ENTRY_MCAST_MAX_GROUPS]); 264 br_multicast_ngroups_set_max(&v->port_mcast_ctx, val); 265 *changed = true; 266 } 267 #endif 268 269 if (tb[BRIDGE_VLANDB_ENTRY_NEIGH_SUPPRESS]) { 270 bool enabled = v->priv_flags & BR_VLFLAG_NEIGH_SUPPRESS_ENABLED; 271 bool val = nla_get_u8(tb[BRIDGE_VLANDB_ENTRY_NEIGH_SUPPRESS]); 272 273 if (!p) { 274 NL_SET_ERR_MSG_MOD(extack, "Can't set neigh_suppress for non-port vlans"); 275 return -EINVAL; 276 } 277 278 if (val != enabled) { 279 v->priv_flags ^= BR_VLFLAG_NEIGH_SUPPRESS_ENABLED; 280 *changed = true; 281 } 282 } 283 284 if (tb[BRIDGE_VLANDB_ENTRY_NEIGH_FORWARD_GRAT]) { 285 bool enabled = v->priv_flags & BR_VLFLAG_NEIGH_FORWARD_GRAT_ENABLED; 286 bool val = nla_get_u8(tb[BRIDGE_VLANDB_ENTRY_NEIGH_FORWARD_GRAT]); 287 288 if (!p) { 289 NL_SET_ERR_MSG_MOD(extack, 290 "Can't set neigh_forward_grat for non-port vlans"); 291 return -EINVAL; 292 } 293 294 if (val != enabled) { 295 v->priv_flags ^= BR_VLFLAG_NEIGH_FORWARD_GRAT_ENABLED; 296 *changed = true; 297 } 298 } 299 300 return 0; 301 } 302 303 int br_vlan_process_options(const struct net_bridge *br, 304 const struct net_bridge_port *p, 305 struct net_bridge_vlan *range_start, 306 struct net_bridge_vlan *range_end, 307 struct nlattr **tb, 308 struct netlink_ext_ack *extack) 309 { 310 struct net_bridge_vlan *v, *curr_start = NULL, *curr_end = NULL; 311 struct net_bridge_vlan_group *vg; 312 int vid, err = 0; 313 u16 pvid; 314 315 if (p) 316 vg = nbp_vlan_group(p); 317 else 318 vg = br_vlan_group(br); 319 320 if (!range_start || !br_vlan_should_use(range_start)) { 321 NL_SET_ERR_MSG_MOD(extack, "Vlan range start doesn't exist, can't process options"); 322 return -ENOENT; 323 } 324 if (!range_end || !br_vlan_should_use(range_end)) { 325 NL_SET_ERR_MSG_MOD(extack, "Vlan range end doesn't exist, can't process options"); 326 return -ENOENT; 327 } 328 329 pvid = br_get_pvid(vg); 330 for (vid = range_start->vid; vid <= range_end->vid; vid++) { 331 bool changed = false; 332 333 v = br_vlan_find(vg, vid); 334 if (!v || !br_vlan_should_use(v)) { 335 NL_SET_ERR_MSG_MOD(extack, "Vlan in range doesn't exist, can't process options"); 336 err = -ENOENT; 337 break; 338 } 339 340 err = br_vlan_process_one_opts(br, p, vg, v, tb, &changed, 341 extack); 342 if (err) 343 break; 344 345 if (changed) { 346 /* vlan options changed, check for range */ 347 if (!curr_start) { 348 curr_start = v; 349 curr_end = v; 350 continue; 351 } 352 353 if (!br_vlan_can_enter_range(v, curr_end, pvid)) { 354 br_vlan_notify(br, p, curr_start->vid, 355 curr_end->vid, RTM_NEWVLAN); 356 curr_start = v; 357 } 358 curr_end = v; 359 } else { 360 /* nothing changed and nothing to notify yet */ 361 if (!curr_start) 362 continue; 363 364 br_vlan_notify(br, p, curr_start->vid, curr_end->vid, 365 RTM_NEWVLAN); 366 curr_start = NULL; 367 curr_end = NULL; 368 } 369 } 370 if (curr_start) 371 br_vlan_notify(br, p, curr_start->vid, curr_end->vid, 372 RTM_NEWVLAN); 373 374 return err; 375 } 376 377 bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr, 378 const struct net_bridge_vlan *r_end) 379 { 380 return v_curr->vid - r_end->vid == 1 && 381 v_curr->msti == r_end->msti && 382 ((v_curr->priv_flags ^ r_end->priv_flags) & 383 BR_VLFLAG_GLOBAL_MCAST_ENABLED) == 0 && 384 br_multicast_ctx_options_equal(&v_curr->br_mcast_ctx, 385 &r_end->br_mcast_ctx); 386 } 387 388 bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range, 389 const struct net_bridge_vlan *v_opts) 390 { 391 struct nlattr *nest2 __maybe_unused; 392 u64 clockval __maybe_unused; 393 struct nlattr *nest; 394 395 nest = nla_nest_start(skb, BRIDGE_VLANDB_GLOBAL_OPTIONS); 396 if (!nest) 397 return false; 398 399 if (nla_put_u16(skb, BRIDGE_VLANDB_GOPTS_ID, vid)) 400 goto out_err; 401 402 if (vid_range && vid < vid_range && 403 nla_put_u16(skb, BRIDGE_VLANDB_GOPTS_RANGE, vid_range)) 404 goto out_err; 405 406 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 407 if (nla_put_u8(skb, BRIDGE_VLANDB_GOPTS_MCAST_SNOOPING, 408 !!(v_opts->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED)) || 409 nla_put_u8(skb, BRIDGE_VLANDB_GOPTS_MCAST_IGMP_VERSION, 410 v_opts->br_mcast_ctx.multicast_igmp_version) || 411 nla_put_u32(skb, BRIDGE_VLANDB_GOPTS_MCAST_LAST_MEMBER_CNT, 412 v_opts->br_mcast_ctx.multicast_last_member_count) || 413 nla_put_u32(skb, BRIDGE_VLANDB_GOPTS_MCAST_STARTUP_QUERY_CNT, 414 v_opts->br_mcast_ctx.multicast_startup_query_count) || 415 nla_put_u8(skb, BRIDGE_VLANDB_GOPTS_MCAST_QUERIER, 416 v_opts->br_mcast_ctx.multicast_querier) || 417 br_multicast_dump_querier_state(skb, &v_opts->br_mcast_ctx, 418 BRIDGE_VLANDB_GOPTS_MCAST_QUERIER_STATE)) 419 goto out_err; 420 421 clockval = jiffies_to_clock_t(v_opts->br_mcast_ctx.multicast_last_member_interval); 422 if (nla_put_u64_64bit(skb, BRIDGE_VLANDB_GOPTS_MCAST_LAST_MEMBER_INTVL, 423 clockval, BRIDGE_VLANDB_GOPTS_PAD)) 424 goto out_err; 425 clockval = jiffies_to_clock_t(v_opts->br_mcast_ctx.multicast_membership_interval); 426 if (nla_put_u64_64bit(skb, BRIDGE_VLANDB_GOPTS_MCAST_MEMBERSHIP_INTVL, 427 clockval, BRIDGE_VLANDB_GOPTS_PAD)) 428 goto out_err; 429 clockval = jiffies_to_clock_t(v_opts->br_mcast_ctx.multicast_querier_interval); 430 if (nla_put_u64_64bit(skb, BRIDGE_VLANDB_GOPTS_MCAST_QUERIER_INTVL, 431 clockval, BRIDGE_VLANDB_GOPTS_PAD)) 432 goto out_err; 433 clockval = jiffies_to_clock_t(v_opts->br_mcast_ctx.multicast_query_interval); 434 if (nla_put_u64_64bit(skb, BRIDGE_VLANDB_GOPTS_MCAST_QUERY_INTVL, 435 clockval, BRIDGE_VLANDB_GOPTS_PAD)) 436 goto out_err; 437 clockval = jiffies_to_clock_t(v_opts->br_mcast_ctx.multicast_query_response_interval); 438 if (nla_put_u64_64bit(skb, BRIDGE_VLANDB_GOPTS_MCAST_QUERY_RESPONSE_INTVL, 439 clockval, BRIDGE_VLANDB_GOPTS_PAD)) 440 goto out_err; 441 clockval = jiffies_to_clock_t(v_opts->br_mcast_ctx.multicast_startup_query_interval); 442 if (nla_put_u64_64bit(skb, BRIDGE_VLANDB_GOPTS_MCAST_STARTUP_QUERY_INTVL, 443 clockval, BRIDGE_VLANDB_GOPTS_PAD)) 444 goto out_err; 445 446 if (br_rports_have_mc_router(&v_opts->br_mcast_ctx)) { 447 nest2 = nla_nest_start(skb, 448 BRIDGE_VLANDB_GOPTS_MCAST_ROUTER_PORTS); 449 if (!nest2) 450 goto out_err; 451 452 rcu_read_lock(); 453 if (br_rports_fill_info(skb, &v_opts->br_mcast_ctx)) { 454 rcu_read_unlock(); 455 nla_nest_cancel(skb, nest2); 456 goto out_err; 457 } 458 rcu_read_unlock(); 459 460 nla_nest_end(skb, nest2); 461 } 462 463 #if IS_ENABLED(CONFIG_IPV6) 464 if (nla_put_u8(skb, BRIDGE_VLANDB_GOPTS_MCAST_MLD_VERSION, 465 v_opts->br_mcast_ctx.multicast_mld_version)) 466 goto out_err; 467 #endif 468 #endif 469 470 if (nla_put_u16(skb, BRIDGE_VLANDB_GOPTS_MSTI, v_opts->msti)) 471 goto out_err; 472 473 nla_nest_end(skb, nest); 474 475 return true; 476 477 out_err: 478 nla_nest_cancel(skb, nest); 479 return false; 480 } 481 482 static size_t rtnl_vlan_global_opts_nlmsg_size(const struct net_bridge_vlan *v) 483 { 484 return NLMSG_ALIGN(sizeof(struct br_vlan_msg)) 485 + nla_total_size(0) /* BRIDGE_VLANDB_GLOBAL_OPTIONS */ 486 + nla_total_size(sizeof(u16)) /* BRIDGE_VLANDB_GOPTS_ID */ 487 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 488 + nla_total_size(sizeof(u8)) /* BRIDGE_VLANDB_GOPTS_MCAST_SNOOPING */ 489 + nla_total_size(sizeof(u8)) /* BRIDGE_VLANDB_GOPTS_MCAST_IGMP_VERSION */ 490 + nla_total_size(sizeof(u8)) /* BRIDGE_VLANDB_GOPTS_MCAST_MLD_VERSION */ 491 + nla_total_size(sizeof(u32)) /* BRIDGE_VLANDB_GOPTS_MCAST_LAST_MEMBER_CNT */ 492 + nla_total_size(sizeof(u32)) /* BRIDGE_VLANDB_GOPTS_MCAST_STARTUP_QUERY_CNT */ 493 + nla_total_size(sizeof(u64)) /* BRIDGE_VLANDB_GOPTS_MCAST_LAST_MEMBER_INTVL */ 494 + nla_total_size(sizeof(u64)) /* BRIDGE_VLANDB_GOPTS_MCAST_MEMBERSHIP_INTVL */ 495 + nla_total_size(sizeof(u64)) /* BRIDGE_VLANDB_GOPTS_MCAST_QUERIER_INTVL */ 496 + nla_total_size(sizeof(u64)) /* BRIDGE_VLANDB_GOPTS_MCAST_QUERY_INTVL */ 497 + nla_total_size(sizeof(u64)) /* BRIDGE_VLANDB_GOPTS_MCAST_QUERY_RESPONSE_INTVL */ 498 + nla_total_size(sizeof(u64)) /* BRIDGE_VLANDB_GOPTS_MCAST_STARTUP_QUERY_INTVL */ 499 + nla_total_size(sizeof(u8)) /* BRIDGE_VLANDB_GOPTS_MCAST_QUERIER */ 500 + br_multicast_querier_state_size() /* BRIDGE_VLANDB_GOPTS_MCAST_QUERIER_STATE */ 501 + nla_total_size(0) /* BRIDGE_VLANDB_GOPTS_MCAST_ROUTER_PORTS */ 502 + br_rports_size(&v->br_mcast_ctx) /* BRIDGE_VLANDB_GOPTS_MCAST_ROUTER_PORTS */ 503 #endif 504 + nla_total_size(sizeof(u16)) /* BRIDGE_VLANDB_GOPTS_MSTI */ 505 + nla_total_size(sizeof(u16)); /* BRIDGE_VLANDB_GOPTS_RANGE */ 506 } 507 508 static void br_vlan_global_opts_notify(const struct net_bridge *br, 509 u16 vid, u16 vid_range) 510 { 511 struct net_bridge_vlan *v; 512 struct br_vlan_msg *bvm; 513 struct nlmsghdr *nlh; 514 struct sk_buff *skb; 515 int err = -ENOBUFS; 516 517 /* right now notifications are done only with rtnl held */ 518 ASSERT_RTNL(); 519 520 /* need to find the vlan due to flags/options */ 521 v = br_vlan_find(br_vlan_group(br), vid); 522 if (!v) 523 return; 524 525 skb = nlmsg_new(rtnl_vlan_global_opts_nlmsg_size(v), GFP_KERNEL); 526 if (!skb) 527 goto out_err; 528 529 err = -EMSGSIZE; 530 nlh = nlmsg_put(skb, 0, 0, RTM_NEWVLAN, sizeof(*bvm), 0); 531 if (!nlh) 532 goto out_err; 533 bvm = nlmsg_data(nlh); 534 memset(bvm, 0, sizeof(*bvm)); 535 bvm->family = AF_BRIDGE; 536 bvm->ifindex = br->dev->ifindex; 537 538 if (!br_vlan_global_opts_fill(skb, vid, vid_range, v)) 539 goto out_err; 540 541 nlmsg_end(skb, nlh); 542 rtnl_notify(skb, dev_net(br->dev), 0, RTNLGRP_BRVLAN, NULL, GFP_KERNEL); 543 return; 544 545 out_err: 546 rtnl_set_sk_err(dev_net(br->dev), RTNLGRP_BRVLAN, err); 547 kfree_skb(skb); 548 } 549 550 static int br_vlan_process_global_one_opts(const struct net_bridge *br, 551 struct net_bridge_vlan_group *vg, 552 struct net_bridge_vlan *v, 553 struct nlattr **tb, 554 bool *changed, 555 struct netlink_ext_ack *extack) 556 { 557 int err __maybe_unused; 558 559 *changed = false; 560 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 561 if (tb[BRIDGE_VLANDB_GOPTS_MCAST_SNOOPING]) { 562 u8 mc_snooping; 563 564 mc_snooping = nla_get_u8(tb[BRIDGE_VLANDB_GOPTS_MCAST_SNOOPING]); 565 if (br_multicast_toggle_global_vlan(v, !!mc_snooping)) 566 *changed = true; 567 } 568 if (tb[BRIDGE_VLANDB_GOPTS_MCAST_IGMP_VERSION]) { 569 u8 ver; 570 571 ver = nla_get_u8(tb[BRIDGE_VLANDB_GOPTS_MCAST_IGMP_VERSION]); 572 err = br_multicast_set_igmp_version(&v->br_mcast_ctx, ver); 573 if (err) 574 return err; 575 *changed = true; 576 } 577 if (tb[BRIDGE_VLANDB_GOPTS_MCAST_LAST_MEMBER_CNT]) { 578 u32 cnt; 579 580 cnt = nla_get_u32(tb[BRIDGE_VLANDB_GOPTS_MCAST_LAST_MEMBER_CNT]); 581 v->br_mcast_ctx.multicast_last_member_count = cnt; 582 *changed = true; 583 } 584 if (tb[BRIDGE_VLANDB_GOPTS_MCAST_STARTUP_QUERY_CNT]) { 585 u32 cnt; 586 587 cnt = nla_get_u32(tb[BRIDGE_VLANDB_GOPTS_MCAST_STARTUP_QUERY_CNT]); 588 v->br_mcast_ctx.multicast_startup_query_count = cnt; 589 *changed = true; 590 } 591 if (tb[BRIDGE_VLANDB_GOPTS_MCAST_LAST_MEMBER_INTVL]) { 592 u64 val; 593 594 val = nla_get_u64(tb[BRIDGE_VLANDB_GOPTS_MCAST_LAST_MEMBER_INTVL]); 595 v->br_mcast_ctx.multicast_last_member_interval = clock_t_to_jiffies(val); 596 *changed = true; 597 } 598 if (tb[BRIDGE_VLANDB_GOPTS_MCAST_MEMBERSHIP_INTVL]) { 599 u64 val; 600 601 val = nla_get_u64(tb[BRIDGE_VLANDB_GOPTS_MCAST_MEMBERSHIP_INTVL]); 602 v->br_mcast_ctx.multicast_membership_interval = clock_t_to_jiffies(val); 603 *changed = true; 604 } 605 if (tb[BRIDGE_VLANDB_GOPTS_MCAST_QUERIER_INTVL]) { 606 u64 val; 607 608 val = nla_get_u64(tb[BRIDGE_VLANDB_GOPTS_MCAST_QUERIER_INTVL]); 609 v->br_mcast_ctx.multicast_querier_interval = clock_t_to_jiffies(val); 610 *changed = true; 611 } 612 if (tb[BRIDGE_VLANDB_GOPTS_MCAST_QUERY_INTVL]) { 613 u64 val; 614 615 val = nla_get_u64(tb[BRIDGE_VLANDB_GOPTS_MCAST_QUERY_INTVL]); 616 br_multicast_set_query_intvl(&v->br_mcast_ctx, val); 617 *changed = true; 618 } 619 if (tb[BRIDGE_VLANDB_GOPTS_MCAST_QUERY_RESPONSE_INTVL]) { 620 u64 val; 621 622 val = nla_get_u64(tb[BRIDGE_VLANDB_GOPTS_MCAST_QUERY_RESPONSE_INTVL]); 623 v->br_mcast_ctx.multicast_query_response_interval = clock_t_to_jiffies(val); 624 *changed = true; 625 } 626 if (tb[BRIDGE_VLANDB_GOPTS_MCAST_STARTUP_QUERY_INTVL]) { 627 u64 val; 628 629 val = nla_get_u64(tb[BRIDGE_VLANDB_GOPTS_MCAST_STARTUP_QUERY_INTVL]); 630 br_multicast_set_startup_query_intvl(&v->br_mcast_ctx, val); 631 *changed = true; 632 } 633 if (tb[BRIDGE_VLANDB_GOPTS_MCAST_QUERIER]) { 634 u8 val; 635 636 val = nla_get_u8(tb[BRIDGE_VLANDB_GOPTS_MCAST_QUERIER]); 637 err = br_multicast_set_querier(&v->br_mcast_ctx, val); 638 if (err) 639 return err; 640 *changed = true; 641 } 642 #if IS_ENABLED(CONFIG_IPV6) 643 if (tb[BRIDGE_VLANDB_GOPTS_MCAST_MLD_VERSION]) { 644 u8 ver; 645 646 ver = nla_get_u8(tb[BRIDGE_VLANDB_GOPTS_MCAST_MLD_VERSION]); 647 err = br_multicast_set_mld_version(&v->br_mcast_ctx, ver); 648 if (err) 649 return err; 650 *changed = true; 651 } 652 #endif 653 #endif 654 if (tb[BRIDGE_VLANDB_GOPTS_MSTI]) { 655 u16 msti; 656 657 msti = nla_get_u16(tb[BRIDGE_VLANDB_GOPTS_MSTI]); 658 err = br_mst_vlan_set_msti(v, msti); 659 if (err) 660 return err; 661 *changed = true; 662 } 663 664 return 0; 665 } 666 667 static const struct nla_policy br_vlan_db_gpol[BRIDGE_VLANDB_GOPTS_MAX + 1] = { 668 [BRIDGE_VLANDB_GOPTS_ID] = { .type = NLA_U16 }, 669 [BRIDGE_VLANDB_GOPTS_RANGE] = { .type = NLA_U16 }, 670 [BRIDGE_VLANDB_GOPTS_MCAST_SNOOPING] = { .type = NLA_U8 }, 671 [BRIDGE_VLANDB_GOPTS_MCAST_MLD_VERSION] = { .type = NLA_U8 }, 672 [BRIDGE_VLANDB_GOPTS_MCAST_QUERY_INTVL] = { .type = NLA_U64 }, 673 [BRIDGE_VLANDB_GOPTS_MCAST_QUERIER] = { .type = NLA_U8 }, 674 [BRIDGE_VLANDB_GOPTS_MCAST_IGMP_VERSION] = { .type = NLA_U8 }, 675 [BRIDGE_VLANDB_GOPTS_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 }, 676 [BRIDGE_VLANDB_GOPTS_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 }, 677 [BRIDGE_VLANDB_GOPTS_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 }, 678 [BRIDGE_VLANDB_GOPTS_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 }, 679 [BRIDGE_VLANDB_GOPTS_MCAST_QUERIER_INTVL] = { .type = NLA_U64 }, 680 [BRIDGE_VLANDB_GOPTS_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 }, 681 [BRIDGE_VLANDB_GOPTS_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 }, 682 [BRIDGE_VLANDB_GOPTS_MSTI] = NLA_POLICY_MAX(NLA_U16, VLAN_N_VID - 1), 683 }; 684 685 int br_vlan_rtm_process_global_options(struct net_device *dev, 686 const struct nlattr *attr, 687 int cmd, 688 struct netlink_ext_ack *extack) 689 { 690 struct net_bridge_vlan *v, *curr_start = NULL, *curr_end = NULL; 691 struct nlattr *tb[BRIDGE_VLANDB_GOPTS_MAX + 1]; 692 struct net_bridge_vlan_group *vg; 693 u16 vid, vid_range = 0; 694 struct net_bridge *br; 695 int err = 0; 696 697 if (cmd != RTM_NEWVLAN) { 698 NL_SET_ERR_MSG_MOD(extack, "Global vlan options support only set operation"); 699 return -EINVAL; 700 } 701 if (!netif_is_bridge_master(dev)) { 702 NL_SET_ERR_MSG_MOD(extack, "Global vlan options can only be set on bridge device"); 703 return -EINVAL; 704 } 705 br = netdev_priv(dev); 706 vg = br_vlan_group(br); 707 if (WARN_ON(!vg)) 708 return -ENODEV; 709 710 err = nla_parse_nested(tb, BRIDGE_VLANDB_GOPTS_MAX, attr, 711 br_vlan_db_gpol, extack); 712 if (err) 713 return err; 714 715 if (!tb[BRIDGE_VLANDB_GOPTS_ID]) { 716 NL_SET_ERR_MSG_MOD(extack, "Missing vlan entry id"); 717 return -EINVAL; 718 } 719 vid = nla_get_u16(tb[BRIDGE_VLANDB_GOPTS_ID]); 720 if (!br_vlan_valid_id(vid, extack)) 721 return -EINVAL; 722 723 if (tb[BRIDGE_VLANDB_GOPTS_RANGE]) { 724 vid_range = nla_get_u16(tb[BRIDGE_VLANDB_GOPTS_RANGE]); 725 if (!br_vlan_valid_id(vid_range, extack)) 726 return -EINVAL; 727 if (vid >= vid_range) { 728 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); 729 return -EINVAL; 730 } 731 } else { 732 vid_range = vid; 733 } 734 735 for (; vid <= vid_range; vid++) { 736 bool changed = false; 737 738 v = br_vlan_find(vg, vid); 739 if (!v) { 740 NL_SET_ERR_MSG_MOD(extack, "Vlan in range doesn't exist, can't process global options"); 741 err = -ENOENT; 742 break; 743 } 744 745 err = br_vlan_process_global_one_opts(br, vg, v, tb, &changed, 746 extack); 747 if (err) 748 break; 749 750 if (changed) { 751 /* vlan options changed, check for range */ 752 if (!curr_start) { 753 curr_start = v; 754 curr_end = v; 755 continue; 756 } 757 758 if (!br_vlan_global_opts_can_enter_range(v, curr_end)) { 759 br_vlan_global_opts_notify(br, curr_start->vid, 760 curr_end->vid); 761 curr_start = v; 762 } 763 curr_end = v; 764 } else { 765 /* nothing changed and nothing to notify yet */ 766 if (!curr_start) 767 continue; 768 769 br_vlan_global_opts_notify(br, curr_start->vid, 770 curr_end->vid); 771 curr_start = NULL; 772 curr_end = NULL; 773 } 774 } 775 if (curr_start) 776 br_vlan_global_opts_notify(br, curr_start->vid, curr_end->vid); 777 778 return err; 779 } 780