Ido Schimmel | a3a48de | 2023-03-15 15:11:51 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
| 2 | |
| 3 | #include <linux/if_bridge.h> |
| 4 | #include <linux/in.h> |
| 5 | #include <linux/list.h> |
| 6 | #include <linux/netdevice.h> |
| 7 | #include <linux/netlink.h> |
| 8 | #include <linux/rhashtable.h> |
| 9 | #include <linux/rhashtable-types.h> |
| 10 | #include <linux/rtnetlink.h> |
| 11 | #include <linux/skbuff.h> |
| 12 | #include <linux/types.h> |
| 13 | #include <net/netlink.h> |
| 14 | #include <net/vxlan.h> |
| 15 | |
| 16 | #include "vxlan_private.h" |
| 17 | |
| 18 | struct vxlan_mdb_entry_key { |
| 19 | union vxlan_addr src; |
| 20 | union vxlan_addr dst; |
| 21 | __be32 vni; |
| 22 | }; |
| 23 | |
| 24 | struct vxlan_mdb_entry { |
| 25 | struct rhash_head rhnode; |
| 26 | struct list_head remotes; |
| 27 | struct vxlan_mdb_entry_key key; |
| 28 | struct hlist_node mdb_node; |
| 29 | struct rcu_head rcu; |
| 30 | }; |
| 31 | |
| 32 | #define VXLAN_MDB_REMOTE_F_BLOCKED BIT(0) |
| 33 | |
| 34 | struct vxlan_mdb_remote { |
| 35 | struct list_head list; |
| 36 | struct vxlan_rdst __rcu *rd; |
| 37 | u8 flags; |
| 38 | u8 filter_mode; |
| 39 | u8 rt_protocol; |
| 40 | struct hlist_head src_list; |
| 41 | struct rcu_head rcu; |
| 42 | }; |
| 43 | |
| 44 | #define VXLAN_SGRP_F_DELETE BIT(0) |
| 45 | |
| 46 | struct vxlan_mdb_src_entry { |
| 47 | struct hlist_node node; |
| 48 | union vxlan_addr addr; |
| 49 | u8 flags; |
| 50 | }; |
| 51 | |
| 52 | struct vxlan_mdb_dump_ctx { |
| 53 | long reserved; |
| 54 | long entry_idx; |
| 55 | long remote_idx; |
| 56 | }; |
| 57 | |
| 58 | struct vxlan_mdb_config_src_entry { |
| 59 | union vxlan_addr addr; |
| 60 | struct list_head node; |
| 61 | }; |
| 62 | |
| 63 | struct vxlan_mdb_config { |
| 64 | struct vxlan_dev *vxlan; |
| 65 | struct vxlan_mdb_entry_key group; |
| 66 | struct list_head src_list; |
| 67 | union vxlan_addr remote_ip; |
| 68 | u32 remote_ifindex; |
| 69 | __be32 remote_vni; |
| 70 | __be16 remote_port; |
| 71 | u16 nlflags; |
| 72 | u8 flags; |
| 73 | u8 filter_mode; |
| 74 | u8 rt_protocol; |
| 75 | }; |
| 76 | |
Ido Schimmel | 4cde72f | 2023-12-17 10:32:41 +0200 | [diff] [blame] | 77 | struct vxlan_mdb_flush_desc { |
| 78 | union vxlan_addr remote_ip; |
| 79 | __be32 src_vni; |
| 80 | __be32 remote_vni; |
| 81 | __be16 remote_port; |
| 82 | u8 rt_protocol; |
| 83 | }; |
| 84 | |
Ido Schimmel | a3a48de | 2023-03-15 15:11:51 +0200 | [diff] [blame] | 85 | static const struct rhashtable_params vxlan_mdb_rht_params = { |
| 86 | .head_offset = offsetof(struct vxlan_mdb_entry, rhnode), |
| 87 | .key_offset = offsetof(struct vxlan_mdb_entry, key), |
| 88 | .key_len = sizeof(struct vxlan_mdb_entry_key), |
| 89 | .automatic_shrinking = true, |
| 90 | }; |
| 91 | |
| 92 | static int __vxlan_mdb_add(const struct vxlan_mdb_config *cfg, |
| 93 | struct netlink_ext_ack *extack); |
| 94 | static int __vxlan_mdb_del(const struct vxlan_mdb_config *cfg, |
| 95 | struct netlink_ext_ack *extack); |
| 96 | |
| 97 | static void vxlan_br_mdb_entry_fill(const struct vxlan_dev *vxlan, |
| 98 | const struct vxlan_mdb_entry *mdb_entry, |
| 99 | const struct vxlan_mdb_remote *remote, |
| 100 | struct br_mdb_entry *e) |
| 101 | { |
| 102 | const union vxlan_addr *dst = &mdb_entry->key.dst; |
| 103 | |
| 104 | memset(e, 0, sizeof(*e)); |
| 105 | e->ifindex = vxlan->dev->ifindex; |
| 106 | e->state = MDB_PERMANENT; |
| 107 | |
| 108 | if (remote->flags & VXLAN_MDB_REMOTE_F_BLOCKED) |
| 109 | e->flags |= MDB_FLAGS_BLOCKED; |
| 110 | |
| 111 | switch (dst->sa.sa_family) { |
| 112 | case AF_INET: |
| 113 | e->addr.u.ip4 = dst->sin.sin_addr.s_addr; |
| 114 | e->addr.proto = htons(ETH_P_IP); |
| 115 | break; |
| 116 | #if IS_ENABLED(CONFIG_IPV6) |
| 117 | case AF_INET6: |
| 118 | e->addr.u.ip6 = dst->sin6.sin6_addr; |
| 119 | e->addr.proto = htons(ETH_P_IPV6); |
| 120 | break; |
| 121 | #endif |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | static int vxlan_mdb_entry_info_fill_srcs(struct sk_buff *skb, |
| 126 | const struct vxlan_mdb_remote *remote) |
| 127 | { |
| 128 | struct vxlan_mdb_src_entry *ent; |
| 129 | struct nlattr *nest; |
| 130 | |
| 131 | if (hlist_empty(&remote->src_list)) |
| 132 | return 0; |
| 133 | |
| 134 | nest = nla_nest_start(skb, MDBA_MDB_EATTR_SRC_LIST); |
| 135 | if (!nest) |
| 136 | return -EMSGSIZE; |
| 137 | |
| 138 | hlist_for_each_entry(ent, &remote->src_list, node) { |
| 139 | struct nlattr *nest_ent; |
| 140 | |
| 141 | nest_ent = nla_nest_start(skb, MDBA_MDB_SRCLIST_ENTRY); |
| 142 | if (!nest_ent) |
| 143 | goto out_cancel_err; |
| 144 | |
| 145 | if (vxlan_nla_put_addr(skb, MDBA_MDB_SRCATTR_ADDRESS, |
| 146 | &ent->addr) || |
| 147 | nla_put_u32(skb, MDBA_MDB_SRCATTR_TIMER, 0)) |
| 148 | goto out_cancel_err; |
| 149 | |
| 150 | nla_nest_end(skb, nest_ent); |
| 151 | } |
| 152 | |
| 153 | nla_nest_end(skb, nest); |
| 154 | |
| 155 | return 0; |
| 156 | |
| 157 | out_cancel_err: |
| 158 | nla_nest_cancel(skb, nest); |
| 159 | return -EMSGSIZE; |
| 160 | } |
| 161 | |
| 162 | static int vxlan_mdb_entry_info_fill(const struct vxlan_dev *vxlan, |
| 163 | struct sk_buff *skb, |
| 164 | const struct vxlan_mdb_entry *mdb_entry, |
| 165 | const struct vxlan_mdb_remote *remote) |
| 166 | { |
| 167 | struct vxlan_rdst *rd = rtnl_dereference(remote->rd); |
| 168 | struct br_mdb_entry e; |
| 169 | struct nlattr *nest; |
| 170 | |
| 171 | nest = nla_nest_start_noflag(skb, MDBA_MDB_ENTRY_INFO); |
| 172 | if (!nest) |
| 173 | return -EMSGSIZE; |
| 174 | |
| 175 | vxlan_br_mdb_entry_fill(vxlan, mdb_entry, remote, &e); |
| 176 | |
| 177 | if (nla_put_nohdr(skb, sizeof(e), &e) || |
| 178 | nla_put_u32(skb, MDBA_MDB_EATTR_TIMER, 0)) |
| 179 | goto nest_err; |
| 180 | |
| 181 | if (!vxlan_addr_any(&mdb_entry->key.src) && |
| 182 | vxlan_nla_put_addr(skb, MDBA_MDB_EATTR_SOURCE, &mdb_entry->key.src)) |
| 183 | goto nest_err; |
| 184 | |
| 185 | if (nla_put_u8(skb, MDBA_MDB_EATTR_RTPROT, remote->rt_protocol) || |
| 186 | nla_put_u8(skb, MDBA_MDB_EATTR_GROUP_MODE, remote->filter_mode) || |
| 187 | vxlan_mdb_entry_info_fill_srcs(skb, remote) || |
| 188 | vxlan_nla_put_addr(skb, MDBA_MDB_EATTR_DST, &rd->remote_ip)) |
| 189 | goto nest_err; |
| 190 | |
| 191 | if (rd->remote_port && rd->remote_port != vxlan->cfg.dst_port && |
| 192 | nla_put_u16(skb, MDBA_MDB_EATTR_DST_PORT, |
| 193 | be16_to_cpu(rd->remote_port))) |
| 194 | goto nest_err; |
| 195 | |
| 196 | if (rd->remote_vni != vxlan->default_dst.remote_vni && |
| 197 | nla_put_u32(skb, MDBA_MDB_EATTR_VNI, be32_to_cpu(rd->remote_vni))) |
| 198 | goto nest_err; |
| 199 | |
| 200 | if (rd->remote_ifindex && |
| 201 | nla_put_u32(skb, MDBA_MDB_EATTR_IFINDEX, rd->remote_ifindex)) |
| 202 | goto nest_err; |
| 203 | |
| 204 | if ((vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA) && |
| 205 | mdb_entry->key.vni && nla_put_u32(skb, MDBA_MDB_EATTR_SRC_VNI, |
| 206 | be32_to_cpu(mdb_entry->key.vni))) |
| 207 | goto nest_err; |
| 208 | |
| 209 | nla_nest_end(skb, nest); |
| 210 | |
| 211 | return 0; |
| 212 | |
| 213 | nest_err: |
| 214 | nla_nest_cancel(skb, nest); |
| 215 | return -EMSGSIZE; |
| 216 | } |
| 217 | |
| 218 | static int vxlan_mdb_entry_fill(const struct vxlan_dev *vxlan, |
| 219 | struct sk_buff *skb, |
| 220 | struct vxlan_mdb_dump_ctx *ctx, |
| 221 | const struct vxlan_mdb_entry *mdb_entry) |
| 222 | { |
| 223 | int remote_idx = 0, s_remote_idx = ctx->remote_idx; |
| 224 | struct vxlan_mdb_remote *remote; |
| 225 | struct nlattr *nest; |
| 226 | int err = 0; |
| 227 | |
| 228 | nest = nla_nest_start_noflag(skb, MDBA_MDB_ENTRY); |
| 229 | if (!nest) |
| 230 | return -EMSGSIZE; |
| 231 | |
| 232 | list_for_each_entry(remote, &mdb_entry->remotes, list) { |
| 233 | if (remote_idx < s_remote_idx) |
| 234 | goto skip; |
| 235 | |
| 236 | err = vxlan_mdb_entry_info_fill(vxlan, skb, mdb_entry, remote); |
| 237 | if (err) |
| 238 | break; |
| 239 | skip: |
| 240 | remote_idx++; |
| 241 | } |
| 242 | |
| 243 | ctx->remote_idx = err ? remote_idx : 0; |
| 244 | nla_nest_end(skb, nest); |
| 245 | return err; |
| 246 | } |
| 247 | |
| 248 | static int vxlan_mdb_fill(const struct vxlan_dev *vxlan, struct sk_buff *skb, |
| 249 | struct vxlan_mdb_dump_ctx *ctx) |
| 250 | { |
| 251 | int entry_idx = 0, s_entry_idx = ctx->entry_idx; |
| 252 | struct vxlan_mdb_entry *mdb_entry; |
| 253 | struct nlattr *nest; |
| 254 | int err = 0; |
| 255 | |
| 256 | nest = nla_nest_start_noflag(skb, MDBA_MDB); |
| 257 | if (!nest) |
| 258 | return -EMSGSIZE; |
| 259 | |
| 260 | hlist_for_each_entry(mdb_entry, &vxlan->mdb_list, mdb_node) { |
| 261 | if (entry_idx < s_entry_idx) |
| 262 | goto skip; |
| 263 | |
| 264 | err = vxlan_mdb_entry_fill(vxlan, skb, ctx, mdb_entry); |
| 265 | if (err) |
| 266 | break; |
| 267 | skip: |
| 268 | entry_idx++; |
| 269 | } |
| 270 | |
| 271 | ctx->entry_idx = err ? entry_idx : 0; |
| 272 | nla_nest_end(skb, nest); |
| 273 | return err; |
| 274 | } |
| 275 | |
| 276 | int vxlan_mdb_dump(struct net_device *dev, struct sk_buff *skb, |
| 277 | struct netlink_callback *cb) |
| 278 | { |
| 279 | struct vxlan_mdb_dump_ctx *ctx = (void *)cb->ctx; |
| 280 | struct vxlan_dev *vxlan = netdev_priv(dev); |
| 281 | struct br_port_msg *bpm; |
| 282 | struct nlmsghdr *nlh; |
| 283 | int err; |
| 284 | |
| 285 | ASSERT_RTNL(); |
| 286 | |
| 287 | NL_ASSERT_DUMP_CTX_FITS(struct vxlan_mdb_dump_ctx); |
| 288 | |
| 289 | nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, |
| 290 | cb->nlh->nlmsg_seq, RTM_NEWMDB, sizeof(*bpm), |
| 291 | NLM_F_MULTI); |
| 292 | if (!nlh) |
| 293 | return -EMSGSIZE; |
| 294 | |
| 295 | bpm = nlmsg_data(nlh); |
| 296 | memset(bpm, 0, sizeof(*bpm)); |
| 297 | bpm->family = AF_BRIDGE; |
| 298 | bpm->ifindex = dev->ifindex; |
| 299 | |
| 300 | err = vxlan_mdb_fill(vxlan, skb, ctx); |
| 301 | |
| 302 | nlmsg_end(skb, nlh); |
| 303 | |
| 304 | cb->seq = vxlan->mdb_seq; |
| 305 | nl_dump_check_consistent(cb, nlh); |
| 306 | |
| 307 | return err; |
| 308 | } |
| 309 | |
| 310 | static const struct nla_policy |
| 311 | vxlan_mdbe_src_list_entry_pol[MDBE_SRCATTR_MAX + 1] = { |
| 312 | [MDBE_SRCATTR_ADDRESS] = NLA_POLICY_RANGE(NLA_BINARY, |
| 313 | sizeof(struct in_addr), |
| 314 | sizeof(struct in6_addr)), |
| 315 | }; |
| 316 | |
| 317 | static const struct nla_policy |
| 318 | vxlan_mdbe_src_list_pol[MDBE_SRC_LIST_MAX + 1] = { |
| 319 | [MDBE_SRC_LIST_ENTRY] = NLA_POLICY_NESTED(vxlan_mdbe_src_list_entry_pol), |
| 320 | }; |
| 321 | |
Jakub Kicinski | ea23fbd | 2023-10-25 09:22:04 -0700 | [diff] [blame] | 322 | static const struct netlink_range_validation vni_range = { |
Ido Schimmel | a3a48de | 2023-03-15 15:11:51 +0200 | [diff] [blame] | 323 | .max = VXLAN_N_VID - 1, |
| 324 | }; |
| 325 | |
| 326 | static const struct nla_policy vxlan_mdbe_attrs_pol[MDBE_ATTR_MAX + 1] = { |
| 327 | [MDBE_ATTR_SOURCE] = NLA_POLICY_RANGE(NLA_BINARY, |
| 328 | sizeof(struct in_addr), |
| 329 | sizeof(struct in6_addr)), |
| 330 | [MDBE_ATTR_GROUP_MODE] = NLA_POLICY_RANGE(NLA_U8, MCAST_EXCLUDE, |
| 331 | MCAST_INCLUDE), |
| 332 | [MDBE_ATTR_SRC_LIST] = NLA_POLICY_NESTED(vxlan_mdbe_src_list_pol), |
| 333 | [MDBE_ATTR_RTPROT] = NLA_POLICY_MIN(NLA_U8, RTPROT_STATIC), |
| 334 | [MDBE_ATTR_DST] = NLA_POLICY_RANGE(NLA_BINARY, |
| 335 | sizeof(struct in_addr), |
| 336 | sizeof(struct in6_addr)), |
| 337 | [MDBE_ATTR_DST_PORT] = { .type = NLA_U16 }, |
| 338 | [MDBE_ATTR_VNI] = NLA_POLICY_FULL_RANGE(NLA_U32, &vni_range), |
| 339 | [MDBE_ATTR_IFINDEX] = NLA_POLICY_MIN(NLA_S32, 1), |
| 340 | [MDBE_ATTR_SRC_VNI] = NLA_POLICY_FULL_RANGE(NLA_U32, &vni_range), |
| 341 | }; |
| 342 | |
| 343 | static bool vxlan_mdb_is_valid_source(const struct nlattr *attr, __be16 proto, |
| 344 | struct netlink_ext_ack *extack) |
| 345 | { |
| 346 | switch (proto) { |
| 347 | case htons(ETH_P_IP): |
| 348 | if (nla_len(attr) != sizeof(struct in_addr)) { |
| 349 | NL_SET_ERR_MSG_MOD(extack, "IPv4 invalid source address length"); |
| 350 | return false; |
| 351 | } |
| 352 | if (ipv4_is_multicast(nla_get_in_addr(attr))) { |
| 353 | NL_SET_ERR_MSG_MOD(extack, "IPv4 multicast source address is not allowed"); |
| 354 | return false; |
| 355 | } |
| 356 | break; |
| 357 | #if IS_ENABLED(CONFIG_IPV6) |
| 358 | case htons(ETH_P_IPV6): { |
| 359 | struct in6_addr src; |
| 360 | |
| 361 | if (nla_len(attr) != sizeof(struct in6_addr)) { |
| 362 | NL_SET_ERR_MSG_MOD(extack, "IPv6 invalid source address length"); |
| 363 | return false; |
| 364 | } |
| 365 | src = nla_get_in6_addr(attr); |
| 366 | if (ipv6_addr_is_multicast(&src)) { |
| 367 | NL_SET_ERR_MSG_MOD(extack, "IPv6 multicast source address is not allowed"); |
| 368 | return false; |
| 369 | } |
| 370 | break; |
| 371 | } |
| 372 | #endif |
| 373 | default: |
| 374 | NL_SET_ERR_MSG_MOD(extack, "Invalid protocol used with source address"); |
| 375 | return false; |
| 376 | } |
| 377 | |
| 378 | return true; |
| 379 | } |
| 380 | |
Ido Schimmel | ff97d2a | 2023-10-25 15:30:12 +0300 | [diff] [blame] | 381 | static void vxlan_mdb_group_set(struct vxlan_mdb_entry_key *group, |
| 382 | const struct br_mdb_entry *entry, |
| 383 | const struct nlattr *source_attr) |
Ido Schimmel | a3a48de | 2023-03-15 15:11:51 +0200 | [diff] [blame] | 384 | { |
Ido Schimmel | a3a48de | 2023-03-15 15:11:51 +0200 | [diff] [blame] | 385 | switch (entry->addr.proto) { |
| 386 | case htons(ETH_P_IP): |
| 387 | group->dst.sa.sa_family = AF_INET; |
| 388 | group->dst.sin.sin_addr.s_addr = entry->addr.u.ip4; |
| 389 | break; |
| 390 | #if IS_ENABLED(CONFIG_IPV6) |
| 391 | case htons(ETH_P_IPV6): |
| 392 | group->dst.sa.sa_family = AF_INET6; |
| 393 | group->dst.sin6.sin6_addr = entry->addr.u.ip6; |
| 394 | break; |
| 395 | #endif |
| 396 | } |
| 397 | |
| 398 | if (source_attr) |
| 399 | vxlan_nla_get_addr(&group->src, source_attr); |
| 400 | } |
| 401 | |
| 402 | static bool vxlan_mdb_is_star_g(const struct vxlan_mdb_entry_key *group) |
| 403 | { |
| 404 | return !vxlan_addr_any(&group->dst) && vxlan_addr_any(&group->src); |
| 405 | } |
| 406 | |
| 407 | static bool vxlan_mdb_is_sg(const struct vxlan_mdb_entry_key *group) |
| 408 | { |
| 409 | return !vxlan_addr_any(&group->dst) && !vxlan_addr_any(&group->src); |
| 410 | } |
| 411 | |
| 412 | static int vxlan_mdb_config_src_entry_init(struct vxlan_mdb_config *cfg, |
| 413 | __be16 proto, |
| 414 | const struct nlattr *src_entry, |
| 415 | struct netlink_ext_ack *extack) |
| 416 | { |
| 417 | struct nlattr *tb[MDBE_SRCATTR_MAX + 1]; |
| 418 | struct vxlan_mdb_config_src_entry *src; |
| 419 | int err; |
| 420 | |
| 421 | err = nla_parse_nested(tb, MDBE_SRCATTR_MAX, src_entry, |
| 422 | vxlan_mdbe_src_list_entry_pol, extack); |
| 423 | if (err) |
| 424 | return err; |
| 425 | |
| 426 | if (NL_REQ_ATTR_CHECK(extack, src_entry, tb, MDBE_SRCATTR_ADDRESS)) |
| 427 | return -EINVAL; |
| 428 | |
| 429 | if (!vxlan_mdb_is_valid_source(tb[MDBE_SRCATTR_ADDRESS], proto, |
| 430 | extack)) |
| 431 | return -EINVAL; |
| 432 | |
| 433 | src = kzalloc(sizeof(*src), GFP_KERNEL); |
| 434 | if (!src) |
| 435 | return -ENOMEM; |
| 436 | |
| 437 | err = vxlan_nla_get_addr(&src->addr, tb[MDBE_SRCATTR_ADDRESS]); |
| 438 | if (err) |
| 439 | goto err_free_src; |
| 440 | |
| 441 | list_add_tail(&src->node, &cfg->src_list); |
| 442 | |
| 443 | return 0; |
| 444 | |
| 445 | err_free_src: |
| 446 | kfree(src); |
| 447 | return err; |
| 448 | } |
| 449 | |
| 450 | static void |
| 451 | vxlan_mdb_config_src_entry_fini(struct vxlan_mdb_config_src_entry *src) |
| 452 | { |
| 453 | list_del(&src->node); |
| 454 | kfree(src); |
| 455 | } |
| 456 | |
| 457 | static int vxlan_mdb_config_src_list_init(struct vxlan_mdb_config *cfg, |
| 458 | __be16 proto, |
| 459 | const struct nlattr *src_list, |
| 460 | struct netlink_ext_ack *extack) |
| 461 | { |
| 462 | struct vxlan_mdb_config_src_entry *src, *tmp; |
| 463 | struct nlattr *src_entry; |
| 464 | int rem, err; |
| 465 | |
| 466 | nla_for_each_nested(src_entry, src_list, rem) { |
| 467 | err = vxlan_mdb_config_src_entry_init(cfg, proto, src_entry, |
| 468 | extack); |
| 469 | if (err) |
| 470 | goto err_src_entry_init; |
| 471 | } |
| 472 | |
| 473 | return 0; |
| 474 | |
| 475 | err_src_entry_init: |
| 476 | list_for_each_entry_safe_reverse(src, tmp, &cfg->src_list, node) |
| 477 | vxlan_mdb_config_src_entry_fini(src); |
| 478 | return err; |
| 479 | } |
| 480 | |
| 481 | static void vxlan_mdb_config_src_list_fini(struct vxlan_mdb_config *cfg) |
| 482 | { |
| 483 | struct vxlan_mdb_config_src_entry *src, *tmp; |
| 484 | |
| 485 | list_for_each_entry_safe_reverse(src, tmp, &cfg->src_list, node) |
| 486 | vxlan_mdb_config_src_entry_fini(src); |
| 487 | } |
| 488 | |
| 489 | static int vxlan_mdb_config_attrs_init(struct vxlan_mdb_config *cfg, |
| 490 | const struct br_mdb_entry *entry, |
| 491 | const struct nlattr *set_attrs, |
| 492 | struct netlink_ext_ack *extack) |
| 493 | { |
| 494 | struct nlattr *mdbe_attrs[MDBE_ATTR_MAX + 1]; |
| 495 | int err; |
| 496 | |
| 497 | err = nla_parse_nested(mdbe_attrs, MDBE_ATTR_MAX, set_attrs, |
| 498 | vxlan_mdbe_attrs_pol, extack); |
| 499 | if (err) |
| 500 | return err; |
| 501 | |
| 502 | if (NL_REQ_ATTR_CHECK(extack, set_attrs, mdbe_attrs, MDBE_ATTR_DST)) { |
| 503 | NL_SET_ERR_MSG_MOD(extack, "Missing remote destination IP address"); |
| 504 | return -EINVAL; |
| 505 | } |
| 506 | |
| 507 | if (mdbe_attrs[MDBE_ATTR_SOURCE] && |
| 508 | !vxlan_mdb_is_valid_source(mdbe_attrs[MDBE_ATTR_SOURCE], |
| 509 | entry->addr.proto, extack)) |
| 510 | return -EINVAL; |
| 511 | |
Ido Schimmel | ff97d2a | 2023-10-25 15:30:12 +0300 | [diff] [blame] | 512 | vxlan_mdb_group_set(&cfg->group, entry, mdbe_attrs[MDBE_ATTR_SOURCE]); |
Ido Schimmel | a3a48de | 2023-03-15 15:11:51 +0200 | [diff] [blame] | 513 | |
| 514 | /* rtnetlink code only validates that IPv4 group address is |
| 515 | * multicast. |
| 516 | */ |
| 517 | if (!vxlan_addr_is_multicast(&cfg->group.dst) && |
| 518 | !vxlan_addr_any(&cfg->group.dst)) { |
| 519 | NL_SET_ERR_MSG_MOD(extack, "Group address is not multicast"); |
| 520 | return -EINVAL; |
| 521 | } |
| 522 | |
| 523 | if (vxlan_addr_any(&cfg->group.dst) && |
| 524 | mdbe_attrs[MDBE_ATTR_SOURCE]) { |
| 525 | NL_SET_ERR_MSG_MOD(extack, "Source cannot be specified for the all-zeros entry"); |
| 526 | return -EINVAL; |
| 527 | } |
| 528 | |
| 529 | if (vxlan_mdb_is_sg(&cfg->group)) |
| 530 | cfg->filter_mode = MCAST_INCLUDE; |
| 531 | |
| 532 | if (mdbe_attrs[MDBE_ATTR_GROUP_MODE]) { |
| 533 | if (!vxlan_mdb_is_star_g(&cfg->group)) { |
| 534 | NL_SET_ERR_MSG_MOD(extack, "Filter mode can only be set for (*, G) entries"); |
| 535 | return -EINVAL; |
| 536 | } |
| 537 | cfg->filter_mode = nla_get_u8(mdbe_attrs[MDBE_ATTR_GROUP_MODE]); |
| 538 | } |
| 539 | |
| 540 | if (mdbe_attrs[MDBE_ATTR_SRC_LIST]) { |
| 541 | if (!vxlan_mdb_is_star_g(&cfg->group)) { |
| 542 | NL_SET_ERR_MSG_MOD(extack, "Source list can only be set for (*, G) entries"); |
| 543 | return -EINVAL; |
| 544 | } |
| 545 | if (!mdbe_attrs[MDBE_ATTR_GROUP_MODE]) { |
| 546 | NL_SET_ERR_MSG_MOD(extack, "Source list cannot be set without filter mode"); |
| 547 | return -EINVAL; |
| 548 | } |
| 549 | err = vxlan_mdb_config_src_list_init(cfg, entry->addr.proto, |
| 550 | mdbe_attrs[MDBE_ATTR_SRC_LIST], |
| 551 | extack); |
| 552 | if (err) |
| 553 | return err; |
| 554 | } |
| 555 | |
| 556 | if (vxlan_mdb_is_star_g(&cfg->group) && list_empty(&cfg->src_list) && |
| 557 | cfg->filter_mode == MCAST_INCLUDE) { |
| 558 | NL_SET_ERR_MSG_MOD(extack, "Cannot add (*, G) INCLUDE with an empty source list"); |
| 559 | return -EINVAL; |
| 560 | } |
| 561 | |
| 562 | if (mdbe_attrs[MDBE_ATTR_RTPROT]) |
| 563 | cfg->rt_protocol = nla_get_u8(mdbe_attrs[MDBE_ATTR_RTPROT]); |
| 564 | |
| 565 | err = vxlan_nla_get_addr(&cfg->remote_ip, mdbe_attrs[MDBE_ATTR_DST]); |
| 566 | if (err) { |
| 567 | NL_SET_ERR_MSG_MOD(extack, "Invalid remote destination address"); |
| 568 | goto err_src_list_fini; |
| 569 | } |
| 570 | |
| 571 | if (mdbe_attrs[MDBE_ATTR_DST_PORT]) |
| 572 | cfg->remote_port = |
| 573 | cpu_to_be16(nla_get_u16(mdbe_attrs[MDBE_ATTR_DST_PORT])); |
| 574 | |
| 575 | if (mdbe_attrs[MDBE_ATTR_VNI]) |
| 576 | cfg->remote_vni = |
| 577 | cpu_to_be32(nla_get_u32(mdbe_attrs[MDBE_ATTR_VNI])); |
| 578 | |
| 579 | if (mdbe_attrs[MDBE_ATTR_IFINDEX]) { |
| 580 | cfg->remote_ifindex = |
| 581 | nla_get_s32(mdbe_attrs[MDBE_ATTR_IFINDEX]); |
| 582 | if (!__dev_get_by_index(cfg->vxlan->net, cfg->remote_ifindex)) { |
| 583 | NL_SET_ERR_MSG_MOD(extack, "Outgoing interface not found"); |
| 584 | err = -EINVAL; |
| 585 | goto err_src_list_fini; |
| 586 | } |
| 587 | } |
| 588 | |
| 589 | if (mdbe_attrs[MDBE_ATTR_SRC_VNI]) |
| 590 | cfg->group.vni = |
| 591 | cpu_to_be32(nla_get_u32(mdbe_attrs[MDBE_ATTR_SRC_VNI])); |
| 592 | |
| 593 | return 0; |
| 594 | |
| 595 | err_src_list_fini: |
| 596 | vxlan_mdb_config_src_list_fini(cfg); |
| 597 | return err; |
| 598 | } |
| 599 | |
| 600 | static int vxlan_mdb_config_init(struct vxlan_mdb_config *cfg, |
| 601 | struct net_device *dev, struct nlattr *tb[], |
| 602 | u16 nlmsg_flags, |
| 603 | struct netlink_ext_ack *extack) |
| 604 | { |
| 605 | struct br_mdb_entry *entry = nla_data(tb[MDBA_SET_ENTRY]); |
| 606 | struct vxlan_dev *vxlan = netdev_priv(dev); |
| 607 | |
| 608 | memset(cfg, 0, sizeof(*cfg)); |
| 609 | cfg->vxlan = vxlan; |
| 610 | cfg->group.vni = vxlan->default_dst.remote_vni; |
| 611 | INIT_LIST_HEAD(&cfg->src_list); |
| 612 | cfg->nlflags = nlmsg_flags; |
| 613 | cfg->filter_mode = MCAST_EXCLUDE; |
| 614 | cfg->rt_protocol = RTPROT_STATIC; |
| 615 | cfg->remote_vni = vxlan->default_dst.remote_vni; |
| 616 | cfg->remote_port = vxlan->cfg.dst_port; |
| 617 | |
| 618 | if (entry->ifindex != dev->ifindex) { |
| 619 | NL_SET_ERR_MSG_MOD(extack, "Port net device must be the VXLAN net device"); |
| 620 | return -EINVAL; |
| 621 | } |
| 622 | |
| 623 | /* State is not part of the entry key and can be ignored on deletion |
| 624 | * requests. |
| 625 | */ |
| 626 | if ((nlmsg_flags & (NLM_F_CREATE | NLM_F_REPLACE)) && |
| 627 | entry->state != MDB_PERMANENT) { |
| 628 | NL_SET_ERR_MSG_MOD(extack, "MDB entry must be permanent"); |
| 629 | return -EINVAL; |
| 630 | } |
| 631 | |
| 632 | if (entry->flags) { |
| 633 | NL_SET_ERR_MSG_MOD(extack, "Invalid MDB entry flags"); |
| 634 | return -EINVAL; |
| 635 | } |
| 636 | |
| 637 | if (entry->vid) { |
| 638 | NL_SET_ERR_MSG_MOD(extack, "VID must not be specified"); |
| 639 | return -EINVAL; |
| 640 | } |
| 641 | |
| 642 | if (entry->addr.proto != htons(ETH_P_IP) && |
| 643 | entry->addr.proto != htons(ETH_P_IPV6)) { |
| 644 | NL_SET_ERR_MSG_MOD(extack, "Group address must be an IPv4 / IPv6 address"); |
| 645 | return -EINVAL; |
| 646 | } |
| 647 | |
| 648 | if (NL_REQ_ATTR_CHECK(extack, NULL, tb, MDBA_SET_ENTRY_ATTRS)) { |
| 649 | NL_SET_ERR_MSG_MOD(extack, "Missing MDBA_SET_ENTRY_ATTRS attribute"); |
| 650 | return -EINVAL; |
| 651 | } |
| 652 | |
| 653 | return vxlan_mdb_config_attrs_init(cfg, entry, tb[MDBA_SET_ENTRY_ATTRS], |
| 654 | extack); |
| 655 | } |
| 656 | |
| 657 | static void vxlan_mdb_config_fini(struct vxlan_mdb_config *cfg) |
| 658 | { |
| 659 | vxlan_mdb_config_src_list_fini(cfg); |
| 660 | } |
| 661 | |
| 662 | static struct vxlan_mdb_entry * |
| 663 | vxlan_mdb_entry_lookup(struct vxlan_dev *vxlan, |
| 664 | const struct vxlan_mdb_entry_key *group) |
| 665 | { |
| 666 | return rhashtable_lookup_fast(&vxlan->mdb_tbl, group, |
| 667 | vxlan_mdb_rht_params); |
| 668 | } |
| 669 | |
| 670 | static struct vxlan_mdb_remote * |
| 671 | vxlan_mdb_remote_lookup(const struct vxlan_mdb_entry *mdb_entry, |
| 672 | const union vxlan_addr *addr) |
| 673 | { |
| 674 | struct vxlan_mdb_remote *remote; |
| 675 | |
| 676 | list_for_each_entry(remote, &mdb_entry->remotes, list) { |
| 677 | struct vxlan_rdst *rd = rtnl_dereference(remote->rd); |
| 678 | |
| 679 | if (vxlan_addr_equal(addr, &rd->remote_ip)) |
| 680 | return remote; |
| 681 | } |
| 682 | |
| 683 | return NULL; |
| 684 | } |
| 685 | |
| 686 | static void vxlan_mdb_rdst_free(struct rcu_head *head) |
| 687 | { |
| 688 | struct vxlan_rdst *rd = container_of(head, struct vxlan_rdst, rcu); |
| 689 | |
| 690 | dst_cache_destroy(&rd->dst_cache); |
| 691 | kfree(rd); |
| 692 | } |
| 693 | |
| 694 | static int vxlan_mdb_remote_rdst_init(const struct vxlan_mdb_config *cfg, |
| 695 | struct vxlan_mdb_remote *remote) |
| 696 | { |
| 697 | struct vxlan_rdst *rd; |
| 698 | int err; |
| 699 | |
| 700 | rd = kzalloc(sizeof(*rd), GFP_KERNEL); |
| 701 | if (!rd) |
| 702 | return -ENOMEM; |
| 703 | |
| 704 | err = dst_cache_init(&rd->dst_cache, GFP_KERNEL); |
| 705 | if (err) |
| 706 | goto err_free_rdst; |
| 707 | |
| 708 | rd->remote_ip = cfg->remote_ip; |
| 709 | rd->remote_port = cfg->remote_port; |
| 710 | rd->remote_vni = cfg->remote_vni; |
| 711 | rd->remote_ifindex = cfg->remote_ifindex; |
| 712 | rcu_assign_pointer(remote->rd, rd); |
| 713 | |
| 714 | return 0; |
| 715 | |
| 716 | err_free_rdst: |
| 717 | kfree(rd); |
| 718 | return err; |
| 719 | } |
| 720 | |
| 721 | static void vxlan_mdb_remote_rdst_fini(struct vxlan_rdst *rd) |
| 722 | { |
| 723 | call_rcu(&rd->rcu, vxlan_mdb_rdst_free); |
| 724 | } |
| 725 | |
| 726 | static int vxlan_mdb_remote_init(const struct vxlan_mdb_config *cfg, |
| 727 | struct vxlan_mdb_remote *remote) |
| 728 | { |
| 729 | int err; |
| 730 | |
| 731 | err = vxlan_mdb_remote_rdst_init(cfg, remote); |
| 732 | if (err) |
| 733 | return err; |
| 734 | |
| 735 | remote->flags = cfg->flags; |
| 736 | remote->filter_mode = cfg->filter_mode; |
| 737 | remote->rt_protocol = cfg->rt_protocol; |
| 738 | INIT_HLIST_HEAD(&remote->src_list); |
| 739 | |
| 740 | return 0; |
| 741 | } |
| 742 | |
| 743 | static void vxlan_mdb_remote_fini(struct vxlan_dev *vxlan, |
| 744 | struct vxlan_mdb_remote *remote) |
| 745 | { |
| 746 | WARN_ON_ONCE(!hlist_empty(&remote->src_list)); |
| 747 | vxlan_mdb_remote_rdst_fini(rtnl_dereference(remote->rd)); |
| 748 | } |
| 749 | |
| 750 | static struct vxlan_mdb_src_entry * |
| 751 | vxlan_mdb_remote_src_entry_lookup(const struct vxlan_mdb_remote *remote, |
| 752 | const union vxlan_addr *addr) |
| 753 | { |
| 754 | struct vxlan_mdb_src_entry *ent; |
| 755 | |
| 756 | hlist_for_each_entry(ent, &remote->src_list, node) { |
| 757 | if (vxlan_addr_equal(&ent->addr, addr)) |
| 758 | return ent; |
| 759 | } |
| 760 | |
| 761 | return NULL; |
| 762 | } |
| 763 | |
| 764 | static struct vxlan_mdb_src_entry * |
| 765 | vxlan_mdb_remote_src_entry_add(struct vxlan_mdb_remote *remote, |
| 766 | const union vxlan_addr *addr) |
| 767 | { |
| 768 | struct vxlan_mdb_src_entry *ent; |
| 769 | |
| 770 | ent = kzalloc(sizeof(*ent), GFP_KERNEL); |
| 771 | if (!ent) |
| 772 | return NULL; |
| 773 | |
| 774 | ent->addr = *addr; |
| 775 | hlist_add_head(&ent->node, &remote->src_list); |
| 776 | |
| 777 | return ent; |
| 778 | } |
| 779 | |
| 780 | static void |
| 781 | vxlan_mdb_remote_src_entry_del(struct vxlan_mdb_src_entry *ent) |
| 782 | { |
| 783 | hlist_del(&ent->node); |
| 784 | kfree(ent); |
| 785 | } |
| 786 | |
| 787 | static int |
| 788 | vxlan_mdb_remote_src_fwd_add(const struct vxlan_mdb_config *cfg, |
| 789 | const union vxlan_addr *addr, |
| 790 | struct netlink_ext_ack *extack) |
| 791 | { |
| 792 | struct vxlan_mdb_config sg_cfg; |
| 793 | |
| 794 | memset(&sg_cfg, 0, sizeof(sg_cfg)); |
| 795 | sg_cfg.vxlan = cfg->vxlan; |
| 796 | sg_cfg.group.src = *addr; |
| 797 | sg_cfg.group.dst = cfg->group.dst; |
| 798 | sg_cfg.group.vni = cfg->group.vni; |
| 799 | INIT_LIST_HEAD(&sg_cfg.src_list); |
| 800 | sg_cfg.remote_ip = cfg->remote_ip; |
| 801 | sg_cfg.remote_ifindex = cfg->remote_ifindex; |
| 802 | sg_cfg.remote_vni = cfg->remote_vni; |
| 803 | sg_cfg.remote_port = cfg->remote_port; |
| 804 | sg_cfg.nlflags = cfg->nlflags; |
| 805 | sg_cfg.filter_mode = MCAST_INCLUDE; |
| 806 | if (cfg->filter_mode == MCAST_EXCLUDE) |
| 807 | sg_cfg.flags = VXLAN_MDB_REMOTE_F_BLOCKED; |
| 808 | sg_cfg.rt_protocol = cfg->rt_protocol; |
| 809 | |
| 810 | return __vxlan_mdb_add(&sg_cfg, extack); |
| 811 | } |
| 812 | |
| 813 | static void |
| 814 | vxlan_mdb_remote_src_fwd_del(struct vxlan_dev *vxlan, |
| 815 | const struct vxlan_mdb_entry_key *group, |
| 816 | const struct vxlan_mdb_remote *remote, |
| 817 | const union vxlan_addr *addr) |
| 818 | { |
| 819 | struct vxlan_rdst *rd = rtnl_dereference(remote->rd); |
| 820 | struct vxlan_mdb_config sg_cfg; |
| 821 | |
| 822 | memset(&sg_cfg, 0, sizeof(sg_cfg)); |
| 823 | sg_cfg.vxlan = vxlan; |
| 824 | sg_cfg.group.src = *addr; |
| 825 | sg_cfg.group.dst = group->dst; |
| 826 | sg_cfg.group.vni = group->vni; |
| 827 | INIT_LIST_HEAD(&sg_cfg.src_list); |
| 828 | sg_cfg.remote_ip = rd->remote_ip; |
| 829 | |
| 830 | __vxlan_mdb_del(&sg_cfg, NULL); |
| 831 | } |
| 832 | |
| 833 | static int |
| 834 | vxlan_mdb_remote_src_add(const struct vxlan_mdb_config *cfg, |
| 835 | struct vxlan_mdb_remote *remote, |
| 836 | const struct vxlan_mdb_config_src_entry *src, |
| 837 | struct netlink_ext_ack *extack) |
| 838 | { |
| 839 | struct vxlan_mdb_src_entry *ent; |
| 840 | int err; |
| 841 | |
| 842 | ent = vxlan_mdb_remote_src_entry_lookup(remote, &src->addr); |
| 843 | if (!ent) { |
| 844 | ent = vxlan_mdb_remote_src_entry_add(remote, &src->addr); |
| 845 | if (!ent) |
| 846 | return -ENOMEM; |
| 847 | } else if (!(cfg->nlflags & NLM_F_REPLACE)) { |
| 848 | NL_SET_ERR_MSG_MOD(extack, "Source entry already exists"); |
| 849 | return -EEXIST; |
| 850 | } |
| 851 | |
| 852 | err = vxlan_mdb_remote_src_fwd_add(cfg, &ent->addr, extack); |
| 853 | if (err) |
| 854 | goto err_src_del; |
| 855 | |
| 856 | /* Clear flags in case source entry was marked for deletion as part of |
| 857 | * replace flow. |
| 858 | */ |
| 859 | ent->flags = 0; |
| 860 | |
| 861 | return 0; |
| 862 | |
| 863 | err_src_del: |
| 864 | vxlan_mdb_remote_src_entry_del(ent); |
| 865 | return err; |
| 866 | } |
| 867 | |
| 868 | static void vxlan_mdb_remote_src_del(struct vxlan_dev *vxlan, |
| 869 | const struct vxlan_mdb_entry_key *group, |
| 870 | const struct vxlan_mdb_remote *remote, |
| 871 | struct vxlan_mdb_src_entry *ent) |
| 872 | { |
| 873 | vxlan_mdb_remote_src_fwd_del(vxlan, group, remote, &ent->addr); |
| 874 | vxlan_mdb_remote_src_entry_del(ent); |
| 875 | } |
| 876 | |
| 877 | static int vxlan_mdb_remote_srcs_add(const struct vxlan_mdb_config *cfg, |
| 878 | struct vxlan_mdb_remote *remote, |
| 879 | struct netlink_ext_ack *extack) |
| 880 | { |
| 881 | struct vxlan_mdb_config_src_entry *src; |
| 882 | struct vxlan_mdb_src_entry *ent; |
| 883 | struct hlist_node *tmp; |
| 884 | int err; |
| 885 | |
| 886 | list_for_each_entry(src, &cfg->src_list, node) { |
| 887 | err = vxlan_mdb_remote_src_add(cfg, remote, src, extack); |
| 888 | if (err) |
| 889 | goto err_src_del; |
| 890 | } |
| 891 | |
| 892 | return 0; |
| 893 | |
| 894 | err_src_del: |
| 895 | hlist_for_each_entry_safe(ent, tmp, &remote->src_list, node) |
| 896 | vxlan_mdb_remote_src_del(cfg->vxlan, &cfg->group, remote, ent); |
| 897 | return err; |
| 898 | } |
| 899 | |
| 900 | static void vxlan_mdb_remote_srcs_del(struct vxlan_dev *vxlan, |
| 901 | const struct vxlan_mdb_entry_key *group, |
| 902 | struct vxlan_mdb_remote *remote) |
| 903 | { |
| 904 | struct vxlan_mdb_src_entry *ent; |
| 905 | struct hlist_node *tmp; |
| 906 | |
| 907 | hlist_for_each_entry_safe(ent, tmp, &remote->src_list, node) |
| 908 | vxlan_mdb_remote_src_del(vxlan, group, remote, ent); |
| 909 | } |
| 910 | |
| 911 | static size_t |
| 912 | vxlan_mdb_nlmsg_src_list_size(const struct vxlan_mdb_entry_key *group, |
| 913 | const struct vxlan_mdb_remote *remote) |
| 914 | { |
| 915 | struct vxlan_mdb_src_entry *ent; |
| 916 | size_t nlmsg_size; |
| 917 | |
| 918 | if (hlist_empty(&remote->src_list)) |
| 919 | return 0; |
| 920 | |
| 921 | /* MDBA_MDB_EATTR_SRC_LIST */ |
| 922 | nlmsg_size = nla_total_size(0); |
| 923 | |
| 924 | hlist_for_each_entry(ent, &remote->src_list, node) { |
| 925 | /* MDBA_MDB_SRCLIST_ENTRY */ |
| 926 | nlmsg_size += nla_total_size(0) + |
| 927 | /* MDBA_MDB_SRCATTR_ADDRESS */ |
| 928 | nla_total_size(vxlan_addr_size(&group->dst)) + |
| 929 | /* MDBA_MDB_SRCATTR_TIMER */ |
| 930 | nla_total_size(sizeof(u8)); |
| 931 | } |
| 932 | |
| 933 | return nlmsg_size; |
| 934 | } |
| 935 | |
Ido Schimmel | 14c32a4 | 2023-10-25 15:30:13 +0300 | [diff] [blame] | 936 | static size_t |
| 937 | vxlan_mdb_nlmsg_remote_size(const struct vxlan_dev *vxlan, |
| 938 | const struct vxlan_mdb_entry *mdb_entry, |
| 939 | const struct vxlan_mdb_remote *remote) |
Ido Schimmel | a3a48de | 2023-03-15 15:11:51 +0200 | [diff] [blame] | 940 | { |
| 941 | const struct vxlan_mdb_entry_key *group = &mdb_entry->key; |
| 942 | struct vxlan_rdst *rd = rtnl_dereference(remote->rd); |
| 943 | size_t nlmsg_size; |
| 944 | |
Ido Schimmel | a3a48de | 2023-03-15 15:11:51 +0200 | [diff] [blame] | 945 | /* MDBA_MDB_ENTRY_INFO */ |
Ido Schimmel | 14c32a4 | 2023-10-25 15:30:13 +0300 | [diff] [blame] | 946 | nlmsg_size = nla_total_size(sizeof(struct br_mdb_entry)) + |
Ido Schimmel | a3a48de | 2023-03-15 15:11:51 +0200 | [diff] [blame] | 947 | /* MDBA_MDB_EATTR_TIMER */ |
| 948 | nla_total_size(sizeof(u32)); |
Ido Schimmel | 14c32a4 | 2023-10-25 15:30:13 +0300 | [diff] [blame] | 949 | |
Ido Schimmel | a3a48de | 2023-03-15 15:11:51 +0200 | [diff] [blame] | 950 | /* MDBA_MDB_EATTR_SOURCE */ |
| 951 | if (vxlan_mdb_is_sg(group)) |
| 952 | nlmsg_size += nla_total_size(vxlan_addr_size(&group->dst)); |
| 953 | /* MDBA_MDB_EATTR_RTPROT */ |
| 954 | nlmsg_size += nla_total_size(sizeof(u8)); |
| 955 | /* MDBA_MDB_EATTR_SRC_LIST */ |
| 956 | nlmsg_size += vxlan_mdb_nlmsg_src_list_size(group, remote); |
| 957 | /* MDBA_MDB_EATTR_GROUP_MODE */ |
| 958 | nlmsg_size += nla_total_size(sizeof(u8)); |
| 959 | /* MDBA_MDB_EATTR_DST */ |
| 960 | nlmsg_size += nla_total_size(vxlan_addr_size(&rd->remote_ip)); |
| 961 | /* MDBA_MDB_EATTR_DST_PORT */ |
| 962 | if (rd->remote_port && rd->remote_port != vxlan->cfg.dst_port) |
| 963 | nlmsg_size += nla_total_size(sizeof(u16)); |
| 964 | /* MDBA_MDB_EATTR_VNI */ |
| 965 | if (rd->remote_vni != vxlan->default_dst.remote_vni) |
| 966 | nlmsg_size += nla_total_size(sizeof(u32)); |
| 967 | /* MDBA_MDB_EATTR_IFINDEX */ |
| 968 | if (rd->remote_ifindex) |
| 969 | nlmsg_size += nla_total_size(sizeof(u32)); |
| 970 | /* MDBA_MDB_EATTR_SRC_VNI */ |
| 971 | if ((vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA) && group->vni) |
| 972 | nlmsg_size += nla_total_size(sizeof(u32)); |
| 973 | |
| 974 | return nlmsg_size; |
| 975 | } |
| 976 | |
Ido Schimmel | 14c32a4 | 2023-10-25 15:30:13 +0300 | [diff] [blame] | 977 | static size_t vxlan_mdb_nlmsg_size(const struct vxlan_dev *vxlan, |
| 978 | const struct vxlan_mdb_entry *mdb_entry, |
| 979 | const struct vxlan_mdb_remote *remote) |
| 980 | { |
| 981 | return NLMSG_ALIGN(sizeof(struct br_port_msg)) + |
| 982 | /* MDBA_MDB */ |
| 983 | nla_total_size(0) + |
| 984 | /* MDBA_MDB_ENTRY */ |
| 985 | nla_total_size(0) + |
| 986 | /* Remote entry */ |
| 987 | vxlan_mdb_nlmsg_remote_size(vxlan, mdb_entry, remote); |
| 988 | } |
| 989 | |
Ido Schimmel | a3a48de | 2023-03-15 15:11:51 +0200 | [diff] [blame] | 990 | static int vxlan_mdb_nlmsg_fill(const struct vxlan_dev *vxlan, |
| 991 | struct sk_buff *skb, |
| 992 | const struct vxlan_mdb_entry *mdb_entry, |
| 993 | const struct vxlan_mdb_remote *remote, |
| 994 | int type) |
| 995 | { |
| 996 | struct nlattr *mdb_nest, *mdb_entry_nest; |
| 997 | struct br_port_msg *bpm; |
| 998 | struct nlmsghdr *nlh; |
| 999 | |
| 1000 | nlh = nlmsg_put(skb, 0, 0, type, sizeof(*bpm), 0); |
| 1001 | if (!nlh) |
| 1002 | return -EMSGSIZE; |
| 1003 | |
| 1004 | bpm = nlmsg_data(nlh); |
| 1005 | memset(bpm, 0, sizeof(*bpm)); |
| 1006 | bpm->family = AF_BRIDGE; |
| 1007 | bpm->ifindex = vxlan->dev->ifindex; |
| 1008 | |
| 1009 | mdb_nest = nla_nest_start_noflag(skb, MDBA_MDB); |
| 1010 | if (!mdb_nest) |
| 1011 | goto cancel; |
| 1012 | mdb_entry_nest = nla_nest_start_noflag(skb, MDBA_MDB_ENTRY); |
| 1013 | if (!mdb_entry_nest) |
| 1014 | goto cancel; |
| 1015 | |
| 1016 | if (vxlan_mdb_entry_info_fill(vxlan, skb, mdb_entry, remote)) |
| 1017 | goto cancel; |
| 1018 | |
| 1019 | nla_nest_end(skb, mdb_entry_nest); |
| 1020 | nla_nest_end(skb, mdb_nest); |
| 1021 | nlmsg_end(skb, nlh); |
| 1022 | |
| 1023 | return 0; |
| 1024 | |
| 1025 | cancel: |
| 1026 | nlmsg_cancel(skb, nlh); |
| 1027 | return -EMSGSIZE; |
| 1028 | } |
| 1029 | |
| 1030 | static void vxlan_mdb_remote_notify(const struct vxlan_dev *vxlan, |
| 1031 | const struct vxlan_mdb_entry *mdb_entry, |
| 1032 | const struct vxlan_mdb_remote *remote, |
| 1033 | int type) |
| 1034 | { |
| 1035 | struct net *net = dev_net(vxlan->dev); |
| 1036 | struct sk_buff *skb; |
| 1037 | int err = -ENOBUFS; |
| 1038 | |
| 1039 | skb = nlmsg_new(vxlan_mdb_nlmsg_size(vxlan, mdb_entry, remote), |
| 1040 | GFP_KERNEL); |
| 1041 | if (!skb) |
| 1042 | goto errout; |
| 1043 | |
| 1044 | err = vxlan_mdb_nlmsg_fill(vxlan, skb, mdb_entry, remote, type); |
| 1045 | if (err) { |
| 1046 | kfree_skb(skb); |
| 1047 | goto errout; |
| 1048 | } |
| 1049 | |
| 1050 | rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_KERNEL); |
| 1051 | return; |
| 1052 | errout: |
| 1053 | rtnl_set_sk_err(net, RTNLGRP_MDB, err); |
| 1054 | } |
| 1055 | |
| 1056 | static int |
| 1057 | vxlan_mdb_remote_srcs_replace(const struct vxlan_mdb_config *cfg, |
| 1058 | const struct vxlan_mdb_entry *mdb_entry, |
| 1059 | struct vxlan_mdb_remote *remote, |
| 1060 | struct netlink_ext_ack *extack) |
| 1061 | { |
| 1062 | struct vxlan_dev *vxlan = cfg->vxlan; |
| 1063 | struct vxlan_mdb_src_entry *ent; |
| 1064 | struct hlist_node *tmp; |
| 1065 | int err; |
| 1066 | |
| 1067 | hlist_for_each_entry(ent, &remote->src_list, node) |
| 1068 | ent->flags |= VXLAN_SGRP_F_DELETE; |
| 1069 | |
| 1070 | err = vxlan_mdb_remote_srcs_add(cfg, remote, extack); |
| 1071 | if (err) |
| 1072 | goto err_clear_delete; |
| 1073 | |
| 1074 | hlist_for_each_entry_safe(ent, tmp, &remote->src_list, node) { |
| 1075 | if (ent->flags & VXLAN_SGRP_F_DELETE) |
| 1076 | vxlan_mdb_remote_src_del(vxlan, &mdb_entry->key, remote, |
| 1077 | ent); |
| 1078 | } |
| 1079 | |
| 1080 | return 0; |
| 1081 | |
| 1082 | err_clear_delete: |
| 1083 | hlist_for_each_entry(ent, &remote->src_list, node) |
| 1084 | ent->flags &= ~VXLAN_SGRP_F_DELETE; |
| 1085 | return err; |
| 1086 | } |
| 1087 | |
| 1088 | static int vxlan_mdb_remote_replace(const struct vxlan_mdb_config *cfg, |
| 1089 | const struct vxlan_mdb_entry *mdb_entry, |
| 1090 | struct vxlan_mdb_remote *remote, |
| 1091 | struct netlink_ext_ack *extack) |
| 1092 | { |
| 1093 | struct vxlan_rdst *new_rd, *old_rd = rtnl_dereference(remote->rd); |
| 1094 | struct vxlan_dev *vxlan = cfg->vxlan; |
| 1095 | int err; |
| 1096 | |
| 1097 | err = vxlan_mdb_remote_rdst_init(cfg, remote); |
| 1098 | if (err) |
| 1099 | return err; |
| 1100 | new_rd = rtnl_dereference(remote->rd); |
| 1101 | |
| 1102 | err = vxlan_mdb_remote_srcs_replace(cfg, mdb_entry, remote, extack); |
| 1103 | if (err) |
| 1104 | goto err_rdst_reset; |
| 1105 | |
| 1106 | WRITE_ONCE(remote->flags, cfg->flags); |
| 1107 | WRITE_ONCE(remote->filter_mode, cfg->filter_mode); |
| 1108 | remote->rt_protocol = cfg->rt_protocol; |
| 1109 | vxlan_mdb_remote_notify(vxlan, mdb_entry, remote, RTM_NEWMDB); |
| 1110 | |
| 1111 | vxlan_mdb_remote_rdst_fini(old_rd); |
| 1112 | |
| 1113 | return 0; |
| 1114 | |
| 1115 | err_rdst_reset: |
| 1116 | rcu_assign_pointer(remote->rd, old_rd); |
| 1117 | vxlan_mdb_remote_rdst_fini(new_rd); |
| 1118 | return err; |
| 1119 | } |
| 1120 | |
| 1121 | static int vxlan_mdb_remote_add(const struct vxlan_mdb_config *cfg, |
| 1122 | struct vxlan_mdb_entry *mdb_entry, |
| 1123 | struct netlink_ext_ack *extack) |
| 1124 | { |
| 1125 | struct vxlan_mdb_remote *remote; |
| 1126 | int err; |
| 1127 | |
| 1128 | remote = vxlan_mdb_remote_lookup(mdb_entry, &cfg->remote_ip); |
| 1129 | if (remote) { |
| 1130 | if (!(cfg->nlflags & NLM_F_REPLACE)) { |
| 1131 | NL_SET_ERR_MSG_MOD(extack, "Replace not specified and MDB remote entry already exists"); |
| 1132 | return -EEXIST; |
| 1133 | } |
| 1134 | return vxlan_mdb_remote_replace(cfg, mdb_entry, remote, extack); |
| 1135 | } |
| 1136 | |
| 1137 | if (!(cfg->nlflags & NLM_F_CREATE)) { |
| 1138 | NL_SET_ERR_MSG_MOD(extack, "Create not specified and entry does not exist"); |
| 1139 | return -ENOENT; |
| 1140 | } |
| 1141 | |
| 1142 | remote = kzalloc(sizeof(*remote), GFP_KERNEL); |
| 1143 | if (!remote) |
| 1144 | return -ENOMEM; |
| 1145 | |
| 1146 | err = vxlan_mdb_remote_init(cfg, remote); |
| 1147 | if (err) { |
| 1148 | NL_SET_ERR_MSG_MOD(extack, "Failed to initialize remote MDB entry"); |
| 1149 | goto err_free_remote; |
| 1150 | } |
| 1151 | |
| 1152 | err = vxlan_mdb_remote_srcs_add(cfg, remote, extack); |
| 1153 | if (err) |
| 1154 | goto err_remote_fini; |
| 1155 | |
| 1156 | list_add_rcu(&remote->list, &mdb_entry->remotes); |
| 1157 | vxlan_mdb_remote_notify(cfg->vxlan, mdb_entry, remote, RTM_NEWMDB); |
| 1158 | |
| 1159 | return 0; |
| 1160 | |
| 1161 | err_remote_fini: |
| 1162 | vxlan_mdb_remote_fini(cfg->vxlan, remote); |
| 1163 | err_free_remote: |
| 1164 | kfree(remote); |
| 1165 | return err; |
| 1166 | } |
| 1167 | |
| 1168 | static void vxlan_mdb_remote_del(struct vxlan_dev *vxlan, |
| 1169 | struct vxlan_mdb_entry *mdb_entry, |
| 1170 | struct vxlan_mdb_remote *remote) |
| 1171 | { |
| 1172 | vxlan_mdb_remote_notify(vxlan, mdb_entry, remote, RTM_DELMDB); |
| 1173 | list_del_rcu(&remote->list); |
| 1174 | vxlan_mdb_remote_srcs_del(vxlan, &mdb_entry->key, remote); |
| 1175 | vxlan_mdb_remote_fini(vxlan, remote); |
| 1176 | kfree_rcu(remote, rcu); |
| 1177 | } |
| 1178 | |
| 1179 | static struct vxlan_mdb_entry * |
| 1180 | vxlan_mdb_entry_get(struct vxlan_dev *vxlan, |
| 1181 | const struct vxlan_mdb_entry_key *group) |
| 1182 | { |
| 1183 | struct vxlan_mdb_entry *mdb_entry; |
| 1184 | int err; |
| 1185 | |
| 1186 | mdb_entry = vxlan_mdb_entry_lookup(vxlan, group); |
| 1187 | if (mdb_entry) |
| 1188 | return mdb_entry; |
| 1189 | |
| 1190 | mdb_entry = kzalloc(sizeof(*mdb_entry), GFP_KERNEL); |
| 1191 | if (!mdb_entry) |
| 1192 | return ERR_PTR(-ENOMEM); |
| 1193 | |
| 1194 | INIT_LIST_HEAD(&mdb_entry->remotes); |
| 1195 | memcpy(&mdb_entry->key, group, sizeof(mdb_entry->key)); |
| 1196 | hlist_add_head(&mdb_entry->mdb_node, &vxlan->mdb_list); |
| 1197 | |
| 1198 | err = rhashtable_lookup_insert_fast(&vxlan->mdb_tbl, |
| 1199 | &mdb_entry->rhnode, |
| 1200 | vxlan_mdb_rht_params); |
| 1201 | if (err) |
| 1202 | goto err_free_entry; |
| 1203 | |
Ido Schimmel | bc6c6b01 | 2023-03-15 15:11:52 +0200 | [diff] [blame] | 1204 | if (hlist_is_singular_node(&mdb_entry->mdb_node, &vxlan->mdb_list)) |
| 1205 | vxlan->cfg.flags |= VXLAN_F_MDB; |
| 1206 | |
Ido Schimmel | a3a48de | 2023-03-15 15:11:51 +0200 | [diff] [blame] | 1207 | return mdb_entry; |
| 1208 | |
| 1209 | err_free_entry: |
| 1210 | hlist_del(&mdb_entry->mdb_node); |
| 1211 | kfree(mdb_entry); |
| 1212 | return ERR_PTR(err); |
| 1213 | } |
| 1214 | |
| 1215 | static void vxlan_mdb_entry_put(struct vxlan_dev *vxlan, |
| 1216 | struct vxlan_mdb_entry *mdb_entry) |
| 1217 | { |
| 1218 | if (!list_empty(&mdb_entry->remotes)) |
| 1219 | return; |
| 1220 | |
Ido Schimmel | bc6c6b01 | 2023-03-15 15:11:52 +0200 | [diff] [blame] | 1221 | if (hlist_is_singular_node(&mdb_entry->mdb_node, &vxlan->mdb_list)) |
| 1222 | vxlan->cfg.flags &= ~VXLAN_F_MDB; |
| 1223 | |
Ido Schimmel | a3a48de | 2023-03-15 15:11:51 +0200 | [diff] [blame] | 1224 | rhashtable_remove_fast(&vxlan->mdb_tbl, &mdb_entry->rhnode, |
| 1225 | vxlan_mdb_rht_params); |
| 1226 | hlist_del(&mdb_entry->mdb_node); |
| 1227 | kfree_rcu(mdb_entry, rcu); |
| 1228 | } |
| 1229 | |
| 1230 | static int __vxlan_mdb_add(const struct vxlan_mdb_config *cfg, |
| 1231 | struct netlink_ext_ack *extack) |
| 1232 | { |
| 1233 | struct vxlan_dev *vxlan = cfg->vxlan; |
| 1234 | struct vxlan_mdb_entry *mdb_entry; |
| 1235 | int err; |
| 1236 | |
| 1237 | mdb_entry = vxlan_mdb_entry_get(vxlan, &cfg->group); |
| 1238 | if (IS_ERR(mdb_entry)) |
| 1239 | return PTR_ERR(mdb_entry); |
| 1240 | |
| 1241 | err = vxlan_mdb_remote_add(cfg, mdb_entry, extack); |
| 1242 | if (err) |
| 1243 | goto err_entry_put; |
| 1244 | |
| 1245 | vxlan->mdb_seq++; |
| 1246 | |
| 1247 | return 0; |
| 1248 | |
| 1249 | err_entry_put: |
| 1250 | vxlan_mdb_entry_put(vxlan, mdb_entry); |
| 1251 | return err; |
| 1252 | } |
| 1253 | |
| 1254 | static int __vxlan_mdb_del(const struct vxlan_mdb_config *cfg, |
| 1255 | struct netlink_ext_ack *extack) |
| 1256 | { |
| 1257 | struct vxlan_dev *vxlan = cfg->vxlan; |
| 1258 | struct vxlan_mdb_entry *mdb_entry; |
| 1259 | struct vxlan_mdb_remote *remote; |
| 1260 | |
| 1261 | mdb_entry = vxlan_mdb_entry_lookup(vxlan, &cfg->group); |
| 1262 | if (!mdb_entry) { |
| 1263 | NL_SET_ERR_MSG_MOD(extack, "Did not find MDB entry"); |
| 1264 | return -ENOENT; |
| 1265 | } |
| 1266 | |
| 1267 | remote = vxlan_mdb_remote_lookup(mdb_entry, &cfg->remote_ip); |
| 1268 | if (!remote) { |
| 1269 | NL_SET_ERR_MSG_MOD(extack, "Did not find MDB remote entry"); |
| 1270 | return -ENOENT; |
| 1271 | } |
| 1272 | |
| 1273 | vxlan_mdb_remote_del(vxlan, mdb_entry, remote); |
| 1274 | vxlan_mdb_entry_put(vxlan, mdb_entry); |
| 1275 | |
| 1276 | vxlan->mdb_seq++; |
| 1277 | |
| 1278 | return 0; |
| 1279 | } |
| 1280 | |
| 1281 | int vxlan_mdb_add(struct net_device *dev, struct nlattr *tb[], u16 nlmsg_flags, |
| 1282 | struct netlink_ext_ack *extack) |
| 1283 | { |
| 1284 | struct vxlan_mdb_config cfg; |
| 1285 | int err; |
| 1286 | |
| 1287 | ASSERT_RTNL(); |
| 1288 | |
| 1289 | err = vxlan_mdb_config_init(&cfg, dev, tb, nlmsg_flags, extack); |
| 1290 | if (err) |
| 1291 | return err; |
| 1292 | |
| 1293 | err = __vxlan_mdb_add(&cfg, extack); |
| 1294 | |
| 1295 | vxlan_mdb_config_fini(&cfg); |
| 1296 | return err; |
| 1297 | } |
| 1298 | |
| 1299 | int vxlan_mdb_del(struct net_device *dev, struct nlattr *tb[], |
| 1300 | struct netlink_ext_ack *extack) |
| 1301 | { |
| 1302 | struct vxlan_mdb_config cfg; |
| 1303 | int err; |
| 1304 | |
| 1305 | ASSERT_RTNL(); |
| 1306 | |
| 1307 | err = vxlan_mdb_config_init(&cfg, dev, tb, 0, extack); |
| 1308 | if (err) |
| 1309 | return err; |
| 1310 | |
| 1311 | err = __vxlan_mdb_del(&cfg, extack); |
| 1312 | |
| 1313 | vxlan_mdb_config_fini(&cfg); |
| 1314 | return err; |
| 1315 | } |
| 1316 | |
Ido Schimmel | 4cde72f | 2023-12-17 10:32:41 +0200 | [diff] [blame] | 1317 | static const struct nla_policy |
| 1318 | vxlan_mdbe_attrs_del_bulk_pol[MDBE_ATTR_MAX + 1] = { |
| 1319 | [MDBE_ATTR_RTPROT] = NLA_POLICY_MIN(NLA_U8, RTPROT_STATIC), |
| 1320 | [MDBE_ATTR_DST] = NLA_POLICY_RANGE(NLA_BINARY, |
| 1321 | sizeof(struct in_addr), |
| 1322 | sizeof(struct in6_addr)), |
| 1323 | [MDBE_ATTR_DST_PORT] = { .type = NLA_U16 }, |
| 1324 | [MDBE_ATTR_VNI] = NLA_POLICY_FULL_RANGE(NLA_U32, &vni_range), |
| 1325 | [MDBE_ATTR_SRC_VNI] = NLA_POLICY_FULL_RANGE(NLA_U32, &vni_range), |
| 1326 | [MDBE_ATTR_STATE_MASK] = NLA_POLICY_MASK(NLA_U8, MDB_PERMANENT), |
| 1327 | }; |
| 1328 | |
| 1329 | static int vxlan_mdb_flush_desc_init(struct vxlan_dev *vxlan, |
| 1330 | struct vxlan_mdb_flush_desc *desc, |
| 1331 | struct nlattr *tb[], |
| 1332 | struct netlink_ext_ack *extack) |
| 1333 | { |
| 1334 | struct br_mdb_entry *entry = nla_data(tb[MDBA_SET_ENTRY]); |
| 1335 | struct nlattr *mdbe_attrs[MDBE_ATTR_MAX + 1]; |
| 1336 | int err; |
| 1337 | |
| 1338 | if (entry->ifindex && entry->ifindex != vxlan->dev->ifindex) { |
| 1339 | NL_SET_ERR_MSG_MOD(extack, "Invalid port net device"); |
| 1340 | return -EINVAL; |
| 1341 | } |
| 1342 | |
| 1343 | if (entry->vid) { |
| 1344 | NL_SET_ERR_MSG_MOD(extack, "VID must not be specified"); |
| 1345 | return -EINVAL; |
| 1346 | } |
| 1347 | |
| 1348 | if (!tb[MDBA_SET_ENTRY_ATTRS]) |
| 1349 | return 0; |
| 1350 | |
| 1351 | err = nla_parse_nested(mdbe_attrs, MDBE_ATTR_MAX, |
| 1352 | tb[MDBA_SET_ENTRY_ATTRS], |
| 1353 | vxlan_mdbe_attrs_del_bulk_pol, extack); |
| 1354 | if (err) |
| 1355 | return err; |
| 1356 | |
| 1357 | if (mdbe_attrs[MDBE_ATTR_STATE_MASK]) { |
| 1358 | u8 state_mask = nla_get_u8(mdbe_attrs[MDBE_ATTR_STATE_MASK]); |
| 1359 | |
| 1360 | if ((state_mask & MDB_PERMANENT) && !(entry->state & MDB_PERMANENT)) { |
| 1361 | NL_SET_ERR_MSG_MOD(extack, "Only permanent MDB entries are supported"); |
| 1362 | return -EINVAL; |
| 1363 | } |
| 1364 | } |
| 1365 | |
| 1366 | if (mdbe_attrs[MDBE_ATTR_RTPROT]) |
| 1367 | desc->rt_protocol = nla_get_u8(mdbe_attrs[MDBE_ATTR_RTPROT]); |
| 1368 | |
| 1369 | if (mdbe_attrs[MDBE_ATTR_DST]) |
| 1370 | vxlan_nla_get_addr(&desc->remote_ip, mdbe_attrs[MDBE_ATTR_DST]); |
| 1371 | |
| 1372 | if (mdbe_attrs[MDBE_ATTR_DST_PORT]) |
| 1373 | desc->remote_port = |
| 1374 | cpu_to_be16(nla_get_u16(mdbe_attrs[MDBE_ATTR_DST_PORT])); |
| 1375 | |
| 1376 | if (mdbe_attrs[MDBE_ATTR_VNI]) |
| 1377 | desc->remote_vni = |
| 1378 | cpu_to_be32(nla_get_u32(mdbe_attrs[MDBE_ATTR_VNI])); |
| 1379 | |
| 1380 | if (mdbe_attrs[MDBE_ATTR_SRC_VNI]) |
| 1381 | desc->src_vni = |
| 1382 | cpu_to_be32(nla_get_u32(mdbe_attrs[MDBE_ATTR_SRC_VNI])); |
| 1383 | |
| 1384 | return 0; |
| 1385 | } |
| 1386 | |
| 1387 | static void vxlan_mdb_remotes_flush(struct vxlan_dev *vxlan, |
| 1388 | struct vxlan_mdb_entry *mdb_entry, |
| 1389 | const struct vxlan_mdb_flush_desc *desc) |
| 1390 | { |
| 1391 | struct vxlan_mdb_remote *remote, *tmp; |
| 1392 | |
| 1393 | list_for_each_entry_safe(remote, tmp, &mdb_entry->remotes, list) { |
| 1394 | struct vxlan_rdst *rd = rtnl_dereference(remote->rd); |
| 1395 | __be32 remote_vni; |
| 1396 | |
| 1397 | if (desc->remote_ip.sa.sa_family && |
| 1398 | !vxlan_addr_equal(&desc->remote_ip, &rd->remote_ip)) |
| 1399 | continue; |
| 1400 | |
| 1401 | /* Encapsulation is performed with source VNI if remote VNI |
| 1402 | * is not set. |
| 1403 | */ |
| 1404 | remote_vni = rd->remote_vni ? : mdb_entry->key.vni; |
| 1405 | if (desc->remote_vni && desc->remote_vni != remote_vni) |
| 1406 | continue; |
| 1407 | |
| 1408 | if (desc->remote_port && desc->remote_port != rd->remote_port) |
| 1409 | continue; |
| 1410 | |
| 1411 | if (desc->rt_protocol && |
| 1412 | desc->rt_protocol != remote->rt_protocol) |
| 1413 | continue; |
| 1414 | |
| 1415 | vxlan_mdb_remote_del(vxlan, mdb_entry, remote); |
| 1416 | } |
| 1417 | } |
| 1418 | |
| 1419 | static void vxlan_mdb_flush(struct vxlan_dev *vxlan, |
| 1420 | const struct vxlan_mdb_flush_desc *desc) |
| 1421 | { |
| 1422 | struct vxlan_mdb_entry *mdb_entry; |
| 1423 | struct hlist_node *tmp; |
| 1424 | |
| 1425 | /* The removal of an entry cannot trigger the removal of another entry |
| 1426 | * since entries are always added to the head of the list. |
| 1427 | */ |
| 1428 | hlist_for_each_entry_safe(mdb_entry, tmp, &vxlan->mdb_list, mdb_node) { |
| 1429 | if (desc->src_vni && desc->src_vni != mdb_entry->key.vni) |
| 1430 | continue; |
| 1431 | |
| 1432 | vxlan_mdb_remotes_flush(vxlan, mdb_entry, desc); |
| 1433 | /* Entry will only be removed if its remotes list is empty. */ |
| 1434 | vxlan_mdb_entry_put(vxlan, mdb_entry); |
| 1435 | } |
| 1436 | } |
| 1437 | |
| 1438 | int vxlan_mdb_del_bulk(struct net_device *dev, struct nlattr *tb[], |
| 1439 | struct netlink_ext_ack *extack) |
| 1440 | { |
| 1441 | struct vxlan_dev *vxlan = netdev_priv(dev); |
| 1442 | struct vxlan_mdb_flush_desc desc = {}; |
| 1443 | int err; |
| 1444 | |
| 1445 | ASSERT_RTNL(); |
| 1446 | |
| 1447 | err = vxlan_mdb_flush_desc_init(vxlan, &desc, tb, extack); |
| 1448 | if (err) |
| 1449 | return err; |
| 1450 | |
| 1451 | vxlan_mdb_flush(vxlan, &desc); |
| 1452 | |
| 1453 | return 0; |
| 1454 | } |
| 1455 | |
Ido Schimmel | 32d9673 | 2023-10-25 15:30:17 +0300 | [diff] [blame] | 1456 | static const struct nla_policy vxlan_mdbe_attrs_get_pol[MDBE_ATTR_MAX + 1] = { |
| 1457 | [MDBE_ATTR_SOURCE] = NLA_POLICY_RANGE(NLA_BINARY, |
| 1458 | sizeof(struct in_addr), |
| 1459 | sizeof(struct in6_addr)), |
| 1460 | [MDBE_ATTR_SRC_VNI] = NLA_POLICY_FULL_RANGE(NLA_U32, &vni_range), |
| 1461 | }; |
| 1462 | |
| 1463 | static int vxlan_mdb_get_parse(struct net_device *dev, struct nlattr *tb[], |
| 1464 | struct vxlan_mdb_entry_key *group, |
| 1465 | struct netlink_ext_ack *extack) |
| 1466 | { |
| 1467 | struct br_mdb_entry *entry = nla_data(tb[MDBA_GET_ENTRY]); |
| 1468 | struct nlattr *mdbe_attrs[MDBE_ATTR_MAX + 1]; |
| 1469 | struct vxlan_dev *vxlan = netdev_priv(dev); |
| 1470 | int err; |
| 1471 | |
| 1472 | memset(group, 0, sizeof(*group)); |
| 1473 | group->vni = vxlan->default_dst.remote_vni; |
| 1474 | |
| 1475 | if (!tb[MDBA_GET_ENTRY_ATTRS]) { |
| 1476 | vxlan_mdb_group_set(group, entry, NULL); |
| 1477 | return 0; |
| 1478 | } |
| 1479 | |
| 1480 | err = nla_parse_nested(mdbe_attrs, MDBE_ATTR_MAX, |
| 1481 | tb[MDBA_GET_ENTRY_ATTRS], |
| 1482 | vxlan_mdbe_attrs_get_pol, extack); |
| 1483 | if (err) |
| 1484 | return err; |
| 1485 | |
| 1486 | if (mdbe_attrs[MDBE_ATTR_SOURCE] && |
| 1487 | !vxlan_mdb_is_valid_source(mdbe_attrs[MDBE_ATTR_SOURCE], |
| 1488 | entry->addr.proto, extack)) |
| 1489 | return -EINVAL; |
| 1490 | |
| 1491 | vxlan_mdb_group_set(group, entry, mdbe_attrs[MDBE_ATTR_SOURCE]); |
| 1492 | |
| 1493 | if (mdbe_attrs[MDBE_ATTR_SRC_VNI]) |
| 1494 | group->vni = |
| 1495 | cpu_to_be32(nla_get_u32(mdbe_attrs[MDBE_ATTR_SRC_VNI])); |
| 1496 | |
| 1497 | return 0; |
| 1498 | } |
| 1499 | |
| 1500 | static struct sk_buff * |
| 1501 | vxlan_mdb_get_reply_alloc(const struct vxlan_dev *vxlan, |
| 1502 | const struct vxlan_mdb_entry *mdb_entry) |
| 1503 | { |
| 1504 | struct vxlan_mdb_remote *remote; |
| 1505 | size_t nlmsg_size; |
| 1506 | |
| 1507 | nlmsg_size = NLMSG_ALIGN(sizeof(struct br_port_msg)) + |
| 1508 | /* MDBA_MDB */ |
| 1509 | nla_total_size(0) + |
| 1510 | /* MDBA_MDB_ENTRY */ |
| 1511 | nla_total_size(0); |
| 1512 | |
| 1513 | list_for_each_entry(remote, &mdb_entry->remotes, list) |
| 1514 | nlmsg_size += vxlan_mdb_nlmsg_remote_size(vxlan, mdb_entry, |
| 1515 | remote); |
| 1516 | |
| 1517 | return nlmsg_new(nlmsg_size, GFP_KERNEL); |
| 1518 | } |
| 1519 | |
| 1520 | static int |
| 1521 | vxlan_mdb_get_reply_fill(const struct vxlan_dev *vxlan, |
| 1522 | struct sk_buff *skb, |
| 1523 | const struct vxlan_mdb_entry *mdb_entry, |
| 1524 | u32 portid, u32 seq) |
| 1525 | { |
| 1526 | struct nlattr *mdb_nest, *mdb_entry_nest; |
| 1527 | struct vxlan_mdb_remote *remote; |
| 1528 | struct br_port_msg *bpm; |
| 1529 | struct nlmsghdr *nlh; |
| 1530 | int err; |
| 1531 | |
| 1532 | nlh = nlmsg_put(skb, portid, seq, RTM_NEWMDB, sizeof(*bpm), 0); |
| 1533 | if (!nlh) |
| 1534 | return -EMSGSIZE; |
| 1535 | |
| 1536 | bpm = nlmsg_data(nlh); |
| 1537 | memset(bpm, 0, sizeof(*bpm)); |
| 1538 | bpm->family = AF_BRIDGE; |
| 1539 | bpm->ifindex = vxlan->dev->ifindex; |
| 1540 | mdb_nest = nla_nest_start_noflag(skb, MDBA_MDB); |
| 1541 | if (!mdb_nest) { |
| 1542 | err = -EMSGSIZE; |
| 1543 | goto cancel; |
| 1544 | } |
| 1545 | mdb_entry_nest = nla_nest_start_noflag(skb, MDBA_MDB_ENTRY); |
| 1546 | if (!mdb_entry_nest) { |
| 1547 | err = -EMSGSIZE; |
| 1548 | goto cancel; |
| 1549 | } |
| 1550 | |
| 1551 | list_for_each_entry(remote, &mdb_entry->remotes, list) { |
| 1552 | err = vxlan_mdb_entry_info_fill(vxlan, skb, mdb_entry, remote); |
| 1553 | if (err) |
| 1554 | goto cancel; |
| 1555 | } |
| 1556 | |
| 1557 | nla_nest_end(skb, mdb_entry_nest); |
| 1558 | nla_nest_end(skb, mdb_nest); |
| 1559 | nlmsg_end(skb, nlh); |
| 1560 | |
| 1561 | return 0; |
| 1562 | |
| 1563 | cancel: |
| 1564 | nlmsg_cancel(skb, nlh); |
| 1565 | return err; |
| 1566 | } |
| 1567 | |
| 1568 | int vxlan_mdb_get(struct net_device *dev, struct nlattr *tb[], u32 portid, |
| 1569 | u32 seq, struct netlink_ext_ack *extack) |
| 1570 | { |
| 1571 | struct vxlan_dev *vxlan = netdev_priv(dev); |
| 1572 | struct vxlan_mdb_entry *mdb_entry; |
| 1573 | struct vxlan_mdb_entry_key group; |
| 1574 | struct sk_buff *skb; |
| 1575 | int err; |
| 1576 | |
| 1577 | ASSERT_RTNL(); |
| 1578 | |
| 1579 | err = vxlan_mdb_get_parse(dev, tb, &group, extack); |
| 1580 | if (err) |
| 1581 | return err; |
| 1582 | |
| 1583 | mdb_entry = vxlan_mdb_entry_lookup(vxlan, &group); |
| 1584 | if (!mdb_entry) { |
| 1585 | NL_SET_ERR_MSG_MOD(extack, "MDB entry not found"); |
| 1586 | return -ENOENT; |
| 1587 | } |
| 1588 | |
| 1589 | skb = vxlan_mdb_get_reply_alloc(vxlan, mdb_entry); |
| 1590 | if (!skb) |
| 1591 | return -ENOMEM; |
| 1592 | |
| 1593 | err = vxlan_mdb_get_reply_fill(vxlan, skb, mdb_entry, portid, seq); |
| 1594 | if (err) { |
| 1595 | NL_SET_ERR_MSG_MOD(extack, "Failed to fill MDB get reply"); |
| 1596 | goto free; |
| 1597 | } |
| 1598 | |
| 1599 | return rtnl_unicast(skb, dev_net(dev), portid); |
| 1600 | |
| 1601 | free: |
| 1602 | kfree_skb(skb); |
| 1603 | return err; |
| 1604 | } |
| 1605 | |
Ido Schimmel | 0f83e69 | 2023-03-15 15:11:53 +0200 | [diff] [blame] | 1606 | struct vxlan_mdb_entry *vxlan_mdb_entry_skb_get(struct vxlan_dev *vxlan, |
| 1607 | struct sk_buff *skb, |
| 1608 | __be32 src_vni) |
| 1609 | { |
| 1610 | struct vxlan_mdb_entry *mdb_entry; |
| 1611 | struct vxlan_mdb_entry_key group; |
| 1612 | |
| 1613 | if (!is_multicast_ether_addr(eth_hdr(skb)->h_dest) || |
| 1614 | is_broadcast_ether_addr(eth_hdr(skb)->h_dest)) |
| 1615 | return NULL; |
| 1616 | |
| 1617 | /* When not in collect metadata mode, 'src_vni' is zero, but MDB |
| 1618 | * entries are stored with the VNI of the VXLAN device. |
| 1619 | */ |
| 1620 | if (!(vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA)) |
| 1621 | src_vni = vxlan->default_dst.remote_vni; |
| 1622 | |
| 1623 | memset(&group, 0, sizeof(group)); |
| 1624 | group.vni = src_vni; |
| 1625 | |
| 1626 | switch (skb->protocol) { |
| 1627 | case htons(ETH_P_IP): |
| 1628 | if (!pskb_may_pull(skb, sizeof(struct iphdr))) |
| 1629 | return NULL; |
| 1630 | group.dst.sa.sa_family = AF_INET; |
| 1631 | group.dst.sin.sin_addr.s_addr = ip_hdr(skb)->daddr; |
| 1632 | group.src.sa.sa_family = AF_INET; |
| 1633 | group.src.sin.sin_addr.s_addr = ip_hdr(skb)->saddr; |
| 1634 | break; |
| 1635 | #if IS_ENABLED(CONFIG_IPV6) |
| 1636 | case htons(ETH_P_IPV6): |
| 1637 | if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) |
| 1638 | return NULL; |
| 1639 | group.dst.sa.sa_family = AF_INET6; |
| 1640 | group.dst.sin6.sin6_addr = ipv6_hdr(skb)->daddr; |
| 1641 | group.src.sa.sa_family = AF_INET6; |
| 1642 | group.src.sin6.sin6_addr = ipv6_hdr(skb)->saddr; |
| 1643 | break; |
| 1644 | #endif |
| 1645 | default: |
| 1646 | return NULL; |
| 1647 | } |
| 1648 | |
| 1649 | mdb_entry = vxlan_mdb_entry_lookup(vxlan, &group); |
| 1650 | if (mdb_entry) |
| 1651 | return mdb_entry; |
| 1652 | |
| 1653 | memset(&group.src, 0, sizeof(group.src)); |
| 1654 | mdb_entry = vxlan_mdb_entry_lookup(vxlan, &group); |
| 1655 | if (mdb_entry) |
| 1656 | return mdb_entry; |
| 1657 | |
| 1658 | /* No (S, G) or (*, G) found. Look up the all-zeros entry, but only if |
| 1659 | * the destination IP address is not link-local multicast since we want |
| 1660 | * to transmit such traffic together with broadcast and unknown unicast |
| 1661 | * traffic. |
| 1662 | */ |
| 1663 | switch (skb->protocol) { |
| 1664 | case htons(ETH_P_IP): |
| 1665 | if (ipv4_is_local_multicast(group.dst.sin.sin_addr.s_addr)) |
| 1666 | return NULL; |
| 1667 | group.dst.sin.sin_addr.s_addr = 0; |
| 1668 | break; |
| 1669 | #if IS_ENABLED(CONFIG_IPV6) |
| 1670 | case htons(ETH_P_IPV6): |
| 1671 | if (ipv6_addr_type(&group.dst.sin6.sin6_addr) & |
| 1672 | IPV6_ADDR_LINKLOCAL) |
| 1673 | return NULL; |
| 1674 | memset(&group.dst.sin6.sin6_addr, 0, |
| 1675 | sizeof(group.dst.sin6.sin6_addr)); |
| 1676 | break; |
| 1677 | #endif |
| 1678 | default: |
| 1679 | return NULL; |
| 1680 | } |
| 1681 | |
| 1682 | return vxlan_mdb_entry_lookup(vxlan, &group); |
| 1683 | } |
| 1684 | |
| 1685 | netdev_tx_t vxlan_mdb_xmit(struct vxlan_dev *vxlan, |
| 1686 | const struct vxlan_mdb_entry *mdb_entry, |
| 1687 | struct sk_buff *skb) |
| 1688 | { |
| 1689 | struct vxlan_mdb_remote *remote, *fremote = NULL; |
| 1690 | __be32 src_vni = mdb_entry->key.vni; |
| 1691 | |
| 1692 | list_for_each_entry_rcu(remote, &mdb_entry->remotes, list) { |
| 1693 | struct sk_buff *skb1; |
| 1694 | |
| 1695 | if ((vxlan_mdb_is_star_g(&mdb_entry->key) && |
| 1696 | READ_ONCE(remote->filter_mode) == MCAST_INCLUDE) || |
| 1697 | (READ_ONCE(remote->flags) & VXLAN_MDB_REMOTE_F_BLOCKED)) |
| 1698 | continue; |
| 1699 | |
| 1700 | if (!fremote) { |
| 1701 | fremote = remote; |
| 1702 | continue; |
| 1703 | } |
| 1704 | |
| 1705 | skb1 = skb_clone(skb, GFP_ATOMIC); |
| 1706 | if (skb1) |
| 1707 | vxlan_xmit_one(skb1, vxlan->dev, src_vni, |
| 1708 | rcu_dereference(remote->rd), false); |
| 1709 | } |
| 1710 | |
| 1711 | if (fremote) |
| 1712 | vxlan_xmit_one(skb, vxlan->dev, src_vni, |
| 1713 | rcu_dereference(fremote->rd), false); |
| 1714 | else |
| 1715 | kfree_skb(skb); |
| 1716 | |
| 1717 | return NETDEV_TX_OK; |
| 1718 | } |
| 1719 | |
Ido Schimmel | a3a48de | 2023-03-15 15:11:51 +0200 | [diff] [blame] | 1720 | static void vxlan_mdb_check_empty(void *ptr, void *arg) |
| 1721 | { |
| 1722 | WARN_ON_ONCE(1); |
| 1723 | } |
| 1724 | |
Ido Schimmel | a3a48de | 2023-03-15 15:11:51 +0200 | [diff] [blame] | 1725 | int vxlan_mdb_init(struct vxlan_dev *vxlan) |
| 1726 | { |
| 1727 | int err; |
| 1728 | |
| 1729 | err = rhashtable_init(&vxlan->mdb_tbl, &vxlan_mdb_rht_params); |
| 1730 | if (err) |
| 1731 | return err; |
| 1732 | |
| 1733 | INIT_HLIST_HEAD(&vxlan->mdb_list); |
| 1734 | |
| 1735 | return 0; |
| 1736 | } |
| 1737 | |
| 1738 | void vxlan_mdb_fini(struct vxlan_dev *vxlan) |
| 1739 | { |
Ido Schimmel | 4cde72f | 2023-12-17 10:32:41 +0200 | [diff] [blame] | 1740 | struct vxlan_mdb_flush_desc desc = {}; |
| 1741 | |
| 1742 | vxlan_mdb_flush(vxlan, &desc); |
Ido Schimmel | bc6c6b01 | 2023-03-15 15:11:52 +0200 | [diff] [blame] | 1743 | WARN_ON_ONCE(vxlan->cfg.flags & VXLAN_F_MDB); |
Ido Schimmel | a3a48de | 2023-03-15 15:11:51 +0200 | [diff] [blame] | 1744 | rhashtable_free_and_destroy(&vxlan->mdb_tbl, vxlan_mdb_check_empty, |
| 1745 | NULL); |
| 1746 | } |