1 /*- 2 * Copyright (c) 2014, Bryan Venteicher <bryanv@FreeBSD.org> 3 * All rights reserved. 4 * Copyright (c) 2020, Chelsio Communications. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice unmodified, this list of conditions, and the following 11 * disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include "opt_inet.h" 29 #include "opt_inet6.h" 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include <sys/param.h> 35 #include <sys/eventhandler.h> 36 #include <sys/kernel.h> 37 #include <sys/lock.h> 38 #include <sys/hash.h> 39 #include <sys/malloc.h> 40 #include <sys/mbuf.h> 41 #include <sys/module.h> 42 #include <sys/refcount.h> 43 #include <sys/rmlock.h> 44 #include <sys/priv.h> 45 #include <sys/proc.h> 46 #include <sys/queue.h> 47 #include <sys/sbuf.h> 48 #include <sys/socket.h> 49 #include <sys/socketvar.h> 50 #include <sys/sockio.h> 51 #include <sys/sysctl.h> 52 #include <sys/systm.h> 53 54 #include <net/bpf.h> 55 #include <net/ethernet.h> 56 #include <net/if.h> 57 #include <net/if_var.h> 58 #include <net/if_clone.h> 59 #include <net/if_dl.h> 60 #include <net/if_media.h> 61 #include <net/if_types.h> 62 #include <net/if_vxlan.h> 63 #include <net/netisr.h> 64 #include <net/route.h> 65 #include <net/route/nhop.h> 66 67 #include <netinet/in.h> 68 #include <netinet/in_systm.h> 69 #include <netinet/in_var.h> 70 #include <netinet/in_pcb.h> 71 #include <netinet/ip.h> 72 #include <netinet/ip6.h> 73 #include <netinet/ip_var.h> 74 #include <netinet/udp.h> 75 #include <netinet/udp_var.h> 76 #include <netinet/in_fib.h> 77 #include <netinet6/in6_fib.h> 78 79 #include <netinet6/ip6_var.h> 80 #include <netinet6/scope6_var.h> 81 82 struct vxlan_softc; 83 LIST_HEAD(vxlan_softc_head, vxlan_softc); 84 85 struct sx vxlan_sx; 86 SX_SYSINIT(vxlan, &vxlan_sx, "VXLAN global start/stop lock"); 87 88 struct vxlan_socket_mc_info { 89 union vxlan_sockaddr vxlsomc_saddr; 90 union vxlan_sockaddr vxlsomc_gaddr; 91 int vxlsomc_ifidx; 92 int vxlsomc_users; 93 }; 94 95 /* 96 * The maximum MTU of encapsulated ethernet frame within IPv4/UDP packet. 97 */ 98 #define VXLAN_MAX_MTU (IP_MAXPACKET - \ 99 60 /* Maximum IPv4 header len */ - \ 100 sizeof(struct udphdr) - \ 101 sizeof(struct vxlan_header) - \ 102 ETHER_HDR_LEN - ETHER_CRC_LEN - ETHER_VLAN_ENCAP_LEN) 103 #define VXLAN_BASIC_IFCAPS (IFCAP_LINKSTATE | IFCAP_JUMBO_MTU) 104 105 #define VXLAN_SO_MC_MAX_GROUPS 32 106 107 #define VXLAN_SO_VNI_HASH_SHIFT 6 108 #define VXLAN_SO_VNI_HASH_SIZE (1 << VXLAN_SO_VNI_HASH_SHIFT) 109 #define VXLAN_SO_VNI_HASH(_vni) ((_vni) % VXLAN_SO_VNI_HASH_SIZE) 110 111 struct vxlan_socket { 112 struct socket *vxlso_sock; 113 struct rmlock vxlso_lock; 114 u_int vxlso_refcnt; 115 union vxlan_sockaddr vxlso_laddr; 116 LIST_ENTRY(vxlan_socket) vxlso_entry; 117 struct vxlan_softc_head vxlso_vni_hash[VXLAN_SO_VNI_HASH_SIZE]; 118 struct vxlan_socket_mc_info vxlso_mc[VXLAN_SO_MC_MAX_GROUPS]; 119 }; 120 121 #define VXLAN_SO_RLOCK(_vso, _p) rm_rlock(&(_vso)->vxlso_lock, (_p)) 122 #define VXLAN_SO_RUNLOCK(_vso, _p) rm_runlock(&(_vso)->vxlso_lock, (_p)) 123 #define VXLAN_SO_WLOCK(_vso) rm_wlock(&(_vso)->vxlso_lock) 124 #define VXLAN_SO_WUNLOCK(_vso) rm_wunlock(&(_vso)->vxlso_lock) 125 #define VXLAN_SO_LOCK_ASSERT(_vso) \ 126 rm_assert(&(_vso)->vxlso_lock, RA_LOCKED) 127 #define VXLAN_SO_LOCK_WASSERT(_vso) \ 128 rm_assert(&(_vso)->vxlso_lock, RA_WLOCKED) 129 130 #define VXLAN_SO_ACQUIRE(_vso) refcount_acquire(&(_vso)->vxlso_refcnt) 131 #define VXLAN_SO_RELEASE(_vso) refcount_release(&(_vso)->vxlso_refcnt) 132 133 struct vxlan_ftable_entry { 134 LIST_ENTRY(vxlan_ftable_entry) vxlfe_hash; 135 uint16_t vxlfe_flags; 136 uint8_t vxlfe_mac[ETHER_ADDR_LEN]; 137 union vxlan_sockaddr vxlfe_raddr; 138 time_t vxlfe_expire; 139 }; 140 141 #define VXLAN_FE_FLAG_DYNAMIC 0x01 142 #define VXLAN_FE_FLAG_STATIC 0x02 143 144 #define VXLAN_FE_IS_DYNAMIC(_fe) \ 145 ((_fe)->vxlfe_flags & VXLAN_FE_FLAG_DYNAMIC) 146 147 #define VXLAN_SC_FTABLE_SHIFT 9 148 #define VXLAN_SC_FTABLE_SIZE (1 << VXLAN_SC_FTABLE_SHIFT) 149 #define VXLAN_SC_FTABLE_MASK (VXLAN_SC_FTABLE_SIZE - 1) 150 #define VXLAN_SC_FTABLE_HASH(_sc, _mac) \ 151 (vxlan_mac_hash(_sc, _mac) % VXLAN_SC_FTABLE_SIZE) 152 153 LIST_HEAD(vxlan_ftable_head, vxlan_ftable_entry); 154 155 struct vxlan_statistics { 156 uint32_t ftable_nospace; 157 uint32_t ftable_lock_upgrade_failed; 158 counter_u64_t txcsum; 159 counter_u64_t tso; 160 counter_u64_t rxcsum; 161 }; 162 163 struct vxlan_softc { 164 struct ifnet *vxl_ifp; 165 int vxl_reqcap; 166 struct vxlan_socket *vxl_sock; 167 uint32_t vxl_vni; 168 union vxlan_sockaddr vxl_src_addr; 169 union vxlan_sockaddr vxl_dst_addr; 170 uint32_t vxl_flags; 171 #define VXLAN_FLAG_INIT 0x0001 172 #define VXLAN_FLAG_TEARDOWN 0x0002 173 #define VXLAN_FLAG_LEARN 0x0004 174 #define VXLAN_FLAG_USER_MTU 0x0008 175 176 uint32_t vxl_port_hash_key; 177 uint16_t vxl_min_port; 178 uint16_t vxl_max_port; 179 uint8_t vxl_ttl; 180 181 /* Lookup table from MAC address to forwarding entry. */ 182 uint32_t vxl_ftable_cnt; 183 uint32_t vxl_ftable_max; 184 uint32_t vxl_ftable_timeout; 185 uint32_t vxl_ftable_hash_key; 186 struct vxlan_ftable_head *vxl_ftable; 187 188 /* Derived from vxl_dst_addr. */ 189 struct vxlan_ftable_entry vxl_default_fe; 190 191 struct ip_moptions *vxl_im4o; 192 struct ip6_moptions *vxl_im6o; 193 194 struct rmlock vxl_lock; 195 volatile u_int vxl_refcnt; 196 197 int vxl_unit; 198 int vxl_vso_mc_index; 199 struct vxlan_statistics vxl_stats; 200 struct sysctl_oid *vxl_sysctl_node; 201 struct sysctl_ctx_list vxl_sysctl_ctx; 202 struct callout vxl_callout; 203 struct ether_addr vxl_hwaddr; 204 int vxl_mc_ifindex; 205 struct ifnet *vxl_mc_ifp; 206 struct ifmedia vxl_media; 207 char vxl_mc_ifname[IFNAMSIZ]; 208 LIST_ENTRY(vxlan_softc) vxl_entry; 209 LIST_ENTRY(vxlan_softc) vxl_ifdetach_list; 210 211 /* For rate limiting errors on the tx fast path. */ 212 struct timeval err_time; 213 int err_pps; 214 }; 215 216 #define VXLAN_RLOCK(_sc, _p) rm_rlock(&(_sc)->vxl_lock, (_p)) 217 #define VXLAN_RUNLOCK(_sc, _p) rm_runlock(&(_sc)->vxl_lock, (_p)) 218 #define VXLAN_WLOCK(_sc) rm_wlock(&(_sc)->vxl_lock) 219 #define VXLAN_WUNLOCK(_sc) rm_wunlock(&(_sc)->vxl_lock) 220 #define VXLAN_LOCK_WOWNED(_sc) rm_wowned(&(_sc)->vxl_lock) 221 #define VXLAN_LOCK_ASSERT(_sc) rm_assert(&(_sc)->vxl_lock, RA_LOCKED) 222 #define VXLAN_LOCK_WASSERT(_sc) rm_assert(&(_sc)->vxl_lock, RA_WLOCKED) 223 #define VXLAN_UNLOCK(_sc, _p) do { \ 224 if (VXLAN_LOCK_WOWNED(_sc)) \ 225 VXLAN_WUNLOCK(_sc); \ 226 else \ 227 VXLAN_RUNLOCK(_sc, _p); \ 228 } while (0) 229 230 #define VXLAN_ACQUIRE(_sc) refcount_acquire(&(_sc)->vxl_refcnt) 231 #define VXLAN_RELEASE(_sc) refcount_release(&(_sc)->vxl_refcnt) 232 233 #define satoconstsin(sa) ((const struct sockaddr_in *)(sa)) 234 #define satoconstsin6(sa) ((const struct sockaddr_in6 *)(sa)) 235 236 struct vxlanudphdr { 237 struct udphdr vxlh_udp; 238 struct vxlan_header vxlh_hdr; 239 } __packed; 240 241 static int vxlan_ftable_addr_cmp(const uint8_t *, const uint8_t *); 242 static void vxlan_ftable_init(struct vxlan_softc *); 243 static void vxlan_ftable_fini(struct vxlan_softc *); 244 static void vxlan_ftable_flush(struct vxlan_softc *, int); 245 static void vxlan_ftable_expire(struct vxlan_softc *); 246 static int vxlan_ftable_update_locked(struct vxlan_softc *, 247 const union vxlan_sockaddr *, const uint8_t *, 248 struct rm_priotracker *); 249 static int vxlan_ftable_learn(struct vxlan_softc *, 250 const struct sockaddr *, const uint8_t *); 251 static int vxlan_ftable_sysctl_dump(SYSCTL_HANDLER_ARGS); 252 253 static struct vxlan_ftable_entry * 254 vxlan_ftable_entry_alloc(void); 255 static void vxlan_ftable_entry_free(struct vxlan_ftable_entry *); 256 static void vxlan_ftable_entry_init(struct vxlan_softc *, 257 struct vxlan_ftable_entry *, const uint8_t *, 258 const struct sockaddr *, uint32_t); 259 static void vxlan_ftable_entry_destroy(struct vxlan_softc *, 260 struct vxlan_ftable_entry *); 261 static int vxlan_ftable_entry_insert(struct vxlan_softc *, 262 struct vxlan_ftable_entry *); 263 static struct vxlan_ftable_entry * 264 vxlan_ftable_entry_lookup(struct vxlan_softc *, 265 const uint8_t *); 266 static void vxlan_ftable_entry_dump(struct vxlan_ftable_entry *, 267 struct sbuf *); 268 269 static struct vxlan_socket * 270 vxlan_socket_alloc(const union vxlan_sockaddr *); 271 static void vxlan_socket_destroy(struct vxlan_socket *); 272 static void vxlan_socket_release(struct vxlan_socket *); 273 static struct vxlan_socket * 274 vxlan_socket_lookup(union vxlan_sockaddr *vxlsa); 275 static void vxlan_socket_insert(struct vxlan_socket *); 276 static int vxlan_socket_init(struct vxlan_socket *, struct ifnet *); 277 static int vxlan_socket_bind(struct vxlan_socket *, struct ifnet *); 278 static int vxlan_socket_create(struct ifnet *, int, 279 const union vxlan_sockaddr *, struct vxlan_socket **); 280 static void vxlan_socket_ifdetach(struct vxlan_socket *, 281 struct ifnet *, struct vxlan_softc_head *); 282 283 static struct vxlan_socket * 284 vxlan_socket_mc_lookup(const union vxlan_sockaddr *); 285 static int vxlan_sockaddr_mc_info_match( 286 const struct vxlan_socket_mc_info *, 287 const union vxlan_sockaddr *, 288 const union vxlan_sockaddr *, int); 289 static int vxlan_socket_mc_join_group(struct vxlan_socket *, 290 const union vxlan_sockaddr *, const union vxlan_sockaddr *, 291 int *, union vxlan_sockaddr *); 292 static int vxlan_socket_mc_leave_group(struct vxlan_socket *, 293 const union vxlan_sockaddr *, 294 const union vxlan_sockaddr *, int); 295 static int vxlan_socket_mc_add_group(struct vxlan_socket *, 296 const union vxlan_sockaddr *, const union vxlan_sockaddr *, 297 int, int *); 298 static void vxlan_socket_mc_release_group_by_idx(struct vxlan_socket *, 299 int); 300 301 static struct vxlan_softc * 302 vxlan_socket_lookup_softc_locked(struct vxlan_socket *, 303 uint32_t); 304 static struct vxlan_softc * 305 vxlan_socket_lookup_softc(struct vxlan_socket *, uint32_t); 306 static int vxlan_socket_insert_softc(struct vxlan_socket *, 307 struct vxlan_softc *); 308 static void vxlan_socket_remove_softc(struct vxlan_socket *, 309 struct vxlan_softc *); 310 311 static struct ifnet * 312 vxlan_multicast_if_ref(struct vxlan_softc *, int); 313 static void vxlan_free_multicast(struct vxlan_softc *); 314 static int vxlan_setup_multicast_interface(struct vxlan_softc *); 315 316 static int vxlan_setup_multicast(struct vxlan_softc *); 317 static int vxlan_setup_socket(struct vxlan_softc *); 318 #ifdef INET6 319 static void vxlan_setup_zero_checksum_port(struct vxlan_softc *); 320 #endif 321 static void vxlan_setup_interface_hdrlen(struct vxlan_softc *); 322 static int vxlan_valid_init_config(struct vxlan_softc *); 323 static void vxlan_init_wait(struct vxlan_softc *); 324 static void vxlan_init_complete(struct vxlan_softc *); 325 static void vxlan_init(void *); 326 static void vxlan_release(struct vxlan_softc *); 327 static void vxlan_teardown_wait(struct vxlan_softc *); 328 static void vxlan_teardown_complete(struct vxlan_softc *); 329 static void vxlan_teardown_locked(struct vxlan_softc *); 330 static void vxlan_teardown(struct vxlan_softc *); 331 static void vxlan_ifdetach(struct vxlan_softc *, struct ifnet *, 332 struct vxlan_softc_head *); 333 static void vxlan_timer(void *); 334 335 static int vxlan_ctrl_get_config(struct vxlan_softc *, void *); 336 static int vxlan_ctrl_set_vni(struct vxlan_softc *, void *); 337 static int vxlan_ctrl_set_local_addr(struct vxlan_softc *, void *); 338 static int vxlan_ctrl_set_remote_addr(struct vxlan_softc *, void *); 339 static int vxlan_ctrl_set_local_port(struct vxlan_softc *, void *); 340 static int vxlan_ctrl_set_remote_port(struct vxlan_softc *, void *); 341 static int vxlan_ctrl_set_port_range(struct vxlan_softc *, void *); 342 static int vxlan_ctrl_set_ftable_timeout(struct vxlan_softc *, void *); 343 static int vxlan_ctrl_set_ftable_max(struct vxlan_softc *, void *); 344 static int vxlan_ctrl_set_multicast_if(struct vxlan_softc * , void *); 345 static int vxlan_ctrl_set_ttl(struct vxlan_softc *, void *); 346 static int vxlan_ctrl_set_learn(struct vxlan_softc *, void *); 347 static int vxlan_ctrl_ftable_entry_add(struct vxlan_softc *, void *); 348 static int vxlan_ctrl_ftable_entry_rem(struct vxlan_softc *, void *); 349 static int vxlan_ctrl_flush(struct vxlan_softc *, void *); 350 static int vxlan_ioctl_drvspec(struct vxlan_softc *, 351 struct ifdrv *, int); 352 static int vxlan_ioctl_ifflags(struct vxlan_softc *); 353 static int vxlan_ioctl(struct ifnet *, u_long, caddr_t); 354 355 #if defined(INET) || defined(INET6) 356 static uint16_t vxlan_pick_source_port(struct vxlan_softc *, struct mbuf *); 357 static void vxlan_encap_header(struct vxlan_softc *, struct mbuf *, 358 int, uint16_t, uint16_t); 359 #endif 360 static int vxlan_encap4(struct vxlan_softc *, 361 const union vxlan_sockaddr *, struct mbuf *); 362 static int vxlan_encap6(struct vxlan_softc *, 363 const union vxlan_sockaddr *, struct mbuf *); 364 static int vxlan_transmit(struct ifnet *, struct mbuf *); 365 static void vxlan_qflush(struct ifnet *); 366 static void vxlan_rcv_udp_packet(struct mbuf *, int, struct inpcb *, 367 const struct sockaddr *, void *); 368 static int vxlan_input(struct vxlan_socket *, uint32_t, struct mbuf **, 369 const struct sockaddr *); 370 371 static int vxlan_stats_alloc(struct vxlan_softc *); 372 static void vxlan_stats_free(struct vxlan_softc *); 373 static void vxlan_set_default_config(struct vxlan_softc *); 374 static int vxlan_set_user_config(struct vxlan_softc *, 375 struct ifvxlanparam *); 376 static int vxlan_set_reqcap(struct vxlan_softc *, struct ifnet *, int); 377 static void vxlan_set_hwcaps(struct vxlan_softc *); 378 static int vxlan_clone_create(struct if_clone *, int, caddr_t); 379 static void vxlan_clone_destroy(struct ifnet *); 380 381 static uint32_t vxlan_mac_hash(struct vxlan_softc *, const uint8_t *); 382 static int vxlan_media_change(struct ifnet *); 383 static void vxlan_media_status(struct ifnet *, struct ifmediareq *); 384 385 static int vxlan_sockaddr_cmp(const union vxlan_sockaddr *, 386 const struct sockaddr *); 387 static void vxlan_sockaddr_copy(union vxlan_sockaddr *, 388 const struct sockaddr *); 389 static int vxlan_sockaddr_in_equal(const union vxlan_sockaddr *, 390 const struct sockaddr *); 391 static void vxlan_sockaddr_in_copy(union vxlan_sockaddr *, 392 const struct sockaddr *); 393 static int vxlan_sockaddr_supported(const union vxlan_sockaddr *, int); 394 static int vxlan_sockaddr_in_any(const union vxlan_sockaddr *); 395 static int vxlan_sockaddr_in_multicast(const union vxlan_sockaddr *); 396 static int vxlan_sockaddr_in6_embedscope(union vxlan_sockaddr *); 397 398 static int vxlan_can_change_config(struct vxlan_softc *); 399 static int vxlan_check_vni(uint32_t); 400 static int vxlan_check_ttl(int); 401 static int vxlan_check_ftable_timeout(uint32_t); 402 static int vxlan_check_ftable_max(uint32_t); 403 404 static void vxlan_sysctl_setup(struct vxlan_softc *); 405 static void vxlan_sysctl_destroy(struct vxlan_softc *); 406 static int vxlan_tunable_int(struct vxlan_softc *, const char *, int); 407 408 static void vxlan_ifdetach_event(void *, struct ifnet *); 409 static void vxlan_load(void); 410 static void vxlan_unload(void); 411 static int vxlan_modevent(module_t, int, void *); 412 413 static const char vxlan_name[] = "vxlan"; 414 static MALLOC_DEFINE(M_VXLAN, vxlan_name, 415 "Virtual eXtensible LAN Interface"); 416 static struct if_clone *vxlan_cloner; 417 418 static struct mtx vxlan_list_mtx; 419 #define VXLAN_LIST_LOCK() mtx_lock(&vxlan_list_mtx) 420 #define VXLAN_LIST_UNLOCK() mtx_unlock(&vxlan_list_mtx) 421 422 static LIST_HEAD(, vxlan_socket) vxlan_socket_list; 423 424 static eventhandler_tag vxlan_ifdetach_event_tag; 425 426 SYSCTL_DECL(_net_link); 427 SYSCTL_NODE(_net_link, OID_AUTO, vxlan, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 428 "Virtual eXtensible Local Area Network"); 429 430 static int vxlan_legacy_port = 0; 431 TUNABLE_INT("net.link.vxlan.legacy_port", &vxlan_legacy_port); 432 static int vxlan_reuse_port = 0; 433 TUNABLE_INT("net.link.vxlan.reuse_port", &vxlan_reuse_port); 434 435 /* Default maximum number of addresses in the forwarding table. */ 436 #ifndef VXLAN_FTABLE_MAX 437 #define VXLAN_FTABLE_MAX 2000 438 #endif 439 440 /* Timeout (in seconds) of addresses learned in the forwarding table. */ 441 #ifndef VXLAN_FTABLE_TIMEOUT 442 #define VXLAN_FTABLE_TIMEOUT (20 * 60) 443 #endif 444 445 /* 446 * Maximum timeout (in seconds) of addresses learned in the forwarding 447 * table. 448 */ 449 #ifndef VXLAN_FTABLE_MAX_TIMEOUT 450 #define VXLAN_FTABLE_MAX_TIMEOUT (60 * 60 * 24) 451 #endif 452 453 /* Number of seconds between pruning attempts of the forwarding table. */ 454 #ifndef VXLAN_FTABLE_PRUNE 455 #define VXLAN_FTABLE_PRUNE (5 * 60) 456 #endif 457 458 static int vxlan_ftable_prune_period = VXLAN_FTABLE_PRUNE; 459 460 struct vxlan_control { 461 int (*vxlc_func)(struct vxlan_softc *, void *); 462 int vxlc_argsize; 463 int vxlc_flags; 464 #define VXLAN_CTRL_FLAG_COPYIN 0x01 465 #define VXLAN_CTRL_FLAG_COPYOUT 0x02 466 #define VXLAN_CTRL_FLAG_SUSER 0x04 467 }; 468 469 static const struct vxlan_control vxlan_control_table[] = { 470 [VXLAN_CMD_GET_CONFIG] = 471 { vxlan_ctrl_get_config, sizeof(struct ifvxlancfg), 472 VXLAN_CTRL_FLAG_COPYOUT 473 }, 474 475 [VXLAN_CMD_SET_VNI] = 476 { vxlan_ctrl_set_vni, sizeof(struct ifvxlancmd), 477 VXLAN_CTRL_FLAG_COPYIN | VXLAN_CTRL_FLAG_SUSER, 478 }, 479 480 [VXLAN_CMD_SET_LOCAL_ADDR] = 481 { vxlan_ctrl_set_local_addr, sizeof(struct ifvxlancmd), 482 VXLAN_CTRL_FLAG_COPYIN | VXLAN_CTRL_FLAG_SUSER, 483 }, 484 485 [VXLAN_CMD_SET_REMOTE_ADDR] = 486 { vxlan_ctrl_set_remote_addr, sizeof(struct ifvxlancmd), 487 VXLAN_CTRL_FLAG_COPYIN | VXLAN_CTRL_FLAG_SUSER, 488 }, 489 490 [VXLAN_CMD_SET_LOCAL_PORT] = 491 { vxlan_ctrl_set_local_port, sizeof(struct ifvxlancmd), 492 VXLAN_CTRL_FLAG_COPYIN | VXLAN_CTRL_FLAG_SUSER, 493 }, 494 495 [VXLAN_CMD_SET_REMOTE_PORT] = 496 { vxlan_ctrl_set_remote_port, sizeof(struct ifvxlancmd), 497 VXLAN_CTRL_FLAG_COPYIN | VXLAN_CTRL_FLAG_SUSER, 498 }, 499 500 [VXLAN_CMD_SET_PORT_RANGE] = 501 { vxlan_ctrl_set_port_range, sizeof(struct ifvxlancmd), 502 VXLAN_CTRL_FLAG_COPYIN | VXLAN_CTRL_FLAG_SUSER, 503 }, 504 505 [VXLAN_CMD_SET_FTABLE_TIMEOUT] = 506 { vxlan_ctrl_set_ftable_timeout, sizeof(struct ifvxlancmd), 507 VXLAN_CTRL_FLAG_COPYIN | VXLAN_CTRL_FLAG_SUSER, 508 }, 509 510 [VXLAN_CMD_SET_FTABLE_MAX] = 511 { vxlan_ctrl_set_ftable_max, sizeof(struct ifvxlancmd), 512 VXLAN_CTRL_FLAG_COPYIN | VXLAN_CTRL_FLAG_SUSER, 513 }, 514 515 [VXLAN_CMD_SET_MULTICAST_IF] = 516 { vxlan_ctrl_set_multicast_if, sizeof(struct ifvxlancmd), 517 VXLAN_CTRL_FLAG_COPYIN | VXLAN_CTRL_FLAG_SUSER, 518 }, 519 520 [VXLAN_CMD_SET_TTL] = 521 { vxlan_ctrl_set_ttl, sizeof(struct ifvxlancmd), 522 VXLAN_CTRL_FLAG_COPYIN | VXLAN_CTRL_FLAG_SUSER, 523 }, 524 525 [VXLAN_CMD_SET_LEARN] = 526 { vxlan_ctrl_set_learn, sizeof(struct ifvxlancmd), 527 VXLAN_CTRL_FLAG_COPYIN | VXLAN_CTRL_FLAG_SUSER, 528 }, 529 530 [VXLAN_CMD_FTABLE_ENTRY_ADD] = 531 { vxlan_ctrl_ftable_entry_add, sizeof(struct ifvxlancmd), 532 VXLAN_CTRL_FLAG_COPYIN | VXLAN_CTRL_FLAG_SUSER, 533 }, 534 535 [VXLAN_CMD_FTABLE_ENTRY_REM] = 536 { vxlan_ctrl_ftable_entry_rem, sizeof(struct ifvxlancmd), 537 VXLAN_CTRL_FLAG_COPYIN | VXLAN_CTRL_FLAG_SUSER, 538 }, 539 540 [VXLAN_CMD_FLUSH] = 541 { vxlan_ctrl_flush, sizeof(struct ifvxlancmd), 542 VXLAN_CTRL_FLAG_COPYIN | VXLAN_CTRL_FLAG_SUSER, 543 }, 544 }; 545 546 static const int vxlan_control_table_size = nitems(vxlan_control_table); 547 548 static int 549 vxlan_ftable_addr_cmp(const uint8_t *a, const uint8_t *b) 550 { 551 int i, d; 552 553 for (i = 0, d = 0; i < ETHER_ADDR_LEN && d == 0; i++) 554 d = ((int)a[i]) - ((int)b[i]); 555 556 return (d); 557 } 558 559 static void 560 vxlan_ftable_init(struct vxlan_softc *sc) 561 { 562 int i; 563 564 sc->vxl_ftable = malloc(sizeof(struct vxlan_ftable_head) * 565 VXLAN_SC_FTABLE_SIZE, M_VXLAN, M_ZERO | M_WAITOK); 566 567 for (i = 0; i < VXLAN_SC_FTABLE_SIZE; i++) 568 LIST_INIT(&sc->vxl_ftable[i]); 569 sc->vxl_ftable_hash_key = arc4random(); 570 } 571 572 static void 573 vxlan_ftable_fini(struct vxlan_softc *sc) 574 { 575 int i; 576 577 for (i = 0; i < VXLAN_SC_FTABLE_SIZE; i++) { 578 KASSERT(LIST_EMPTY(&sc->vxl_ftable[i]), 579 ("%s: vxlan %p ftable[%d] not empty", __func__, sc, i)); 580 } 581 MPASS(sc->vxl_ftable_cnt == 0); 582 583 free(sc->vxl_ftable, M_VXLAN); 584 sc->vxl_ftable = NULL; 585 } 586 587 static void 588 vxlan_ftable_flush(struct vxlan_softc *sc, int all) 589 { 590 struct vxlan_ftable_entry *fe, *tfe; 591 int i; 592 593 for (i = 0; i < VXLAN_SC_FTABLE_SIZE; i++) { 594 LIST_FOREACH_SAFE(fe, &sc->vxl_ftable[i], vxlfe_hash, tfe) { 595 if (all || VXLAN_FE_IS_DYNAMIC(fe)) 596 vxlan_ftable_entry_destroy(sc, fe); 597 } 598 } 599 } 600 601 static void 602 vxlan_ftable_expire(struct vxlan_softc *sc) 603 { 604 struct vxlan_ftable_entry *fe, *tfe; 605 int i; 606 607 VXLAN_LOCK_WASSERT(sc); 608 609 for (i = 0; i < VXLAN_SC_FTABLE_SIZE; i++) { 610 LIST_FOREACH_SAFE(fe, &sc->vxl_ftable[i], vxlfe_hash, tfe) { 611 if (VXLAN_FE_IS_DYNAMIC(fe) && 612 time_uptime >= fe->vxlfe_expire) 613 vxlan_ftable_entry_destroy(sc, fe); 614 } 615 } 616 } 617 618 static int 619 vxlan_ftable_update_locked(struct vxlan_softc *sc, 620 const union vxlan_sockaddr *vxlsa, const uint8_t *mac, 621 struct rm_priotracker *tracker) 622 { 623 struct vxlan_ftable_entry *fe; 624 int error __unused; 625 626 VXLAN_LOCK_ASSERT(sc); 627 628 again: 629 /* 630 * A forwarding entry for this MAC address might already exist. If 631 * so, update it, otherwise create a new one. We may have to upgrade 632 * the lock if we have to change or create an entry. 633 */ 634 fe = vxlan_ftable_entry_lookup(sc, mac); 635 if (fe != NULL) { 636 fe->vxlfe_expire = time_uptime + sc->vxl_ftable_timeout; 637 638 if (!VXLAN_FE_IS_DYNAMIC(fe) || 639 vxlan_sockaddr_in_equal(&fe->vxlfe_raddr, &vxlsa->sa)) 640 return (0); 641 if (!VXLAN_LOCK_WOWNED(sc)) { 642 VXLAN_RUNLOCK(sc, tracker); 643 VXLAN_WLOCK(sc); 644 sc->vxl_stats.ftable_lock_upgrade_failed++; 645 goto again; 646 } 647 vxlan_sockaddr_in_copy(&fe->vxlfe_raddr, &vxlsa->sa); 648 return (0); 649 } 650 651 if (!VXLAN_LOCK_WOWNED(sc)) { 652 VXLAN_RUNLOCK(sc, tracker); 653 VXLAN_WLOCK(sc); 654 sc->vxl_stats.ftable_lock_upgrade_failed++; 655 goto again; 656 } 657 658 if (sc->vxl_ftable_cnt >= sc->vxl_ftable_max) { 659 sc->vxl_stats.ftable_nospace++; 660 return (ENOSPC); 661 } 662 663 fe = vxlan_ftable_entry_alloc(); 664 if (fe == NULL) 665 return (ENOMEM); 666 667 vxlan_ftable_entry_init(sc, fe, mac, &vxlsa->sa, VXLAN_FE_FLAG_DYNAMIC); 668 669 /* The prior lookup failed, so the insert should not. */ 670 error = vxlan_ftable_entry_insert(sc, fe); 671 MPASS(error == 0); 672 673 return (0); 674 } 675 676 static int 677 vxlan_ftable_learn(struct vxlan_softc *sc, const struct sockaddr *sa, 678 const uint8_t *mac) 679 { 680 struct rm_priotracker tracker; 681 union vxlan_sockaddr vxlsa; 682 int error; 683 684 /* 685 * The source port may be randomly selected by the remote host, so 686 * use the port of the default destination address. 687 */ 688 vxlan_sockaddr_copy(&vxlsa, sa); 689 vxlsa.in4.sin_port = sc->vxl_dst_addr.in4.sin_port; 690 691 if (VXLAN_SOCKADDR_IS_IPV6(&vxlsa)) { 692 error = vxlan_sockaddr_in6_embedscope(&vxlsa); 693 if (error) 694 return (error); 695 } 696 697 VXLAN_RLOCK(sc, &tracker); 698 error = vxlan_ftable_update_locked(sc, &vxlsa, mac, &tracker); 699 VXLAN_UNLOCK(sc, &tracker); 700 701 return (error); 702 } 703 704 static int 705 vxlan_ftable_sysctl_dump(SYSCTL_HANDLER_ARGS) 706 { 707 struct rm_priotracker tracker; 708 struct sbuf sb; 709 struct vxlan_softc *sc; 710 struct vxlan_ftable_entry *fe; 711 size_t size; 712 int i, error; 713 714 /* 715 * This is mostly intended for debugging during development. It is 716 * not practical to dump an entire large table this way. 717 */ 718 719 sc = arg1; 720 size = PAGE_SIZE; /* Calculate later. */ 721 722 sbuf_new(&sb, NULL, size, SBUF_FIXEDLEN); 723 sbuf_putc(&sb, '\n'); 724 725 VXLAN_RLOCK(sc, &tracker); 726 for (i = 0; i < VXLAN_SC_FTABLE_SIZE; i++) { 727 LIST_FOREACH(fe, &sc->vxl_ftable[i], vxlfe_hash) { 728 if (sbuf_error(&sb) != 0) 729 break; 730 vxlan_ftable_entry_dump(fe, &sb); 731 } 732 } 733 VXLAN_RUNLOCK(sc, &tracker); 734 735 if (sbuf_len(&sb) == 1) 736 sbuf_setpos(&sb, 0); 737 738 sbuf_finish(&sb); 739 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 740 sbuf_delete(&sb); 741 742 return (error); 743 } 744 745 static struct vxlan_ftable_entry * 746 vxlan_ftable_entry_alloc(void) 747 { 748 struct vxlan_ftable_entry *fe; 749 750 fe = malloc(sizeof(*fe), M_VXLAN, M_ZERO | M_NOWAIT); 751 752 return (fe); 753 } 754 755 static void 756 vxlan_ftable_entry_free(struct vxlan_ftable_entry *fe) 757 { 758 759 free(fe, M_VXLAN); 760 } 761 762 static void 763 vxlan_ftable_entry_init(struct vxlan_softc *sc, struct vxlan_ftable_entry *fe, 764 const uint8_t *mac, const struct sockaddr *sa, uint32_t flags) 765 { 766 767 fe->vxlfe_flags = flags; 768 fe->vxlfe_expire = time_uptime + sc->vxl_ftable_timeout; 769 memcpy(fe->vxlfe_mac, mac, ETHER_ADDR_LEN); 770 vxlan_sockaddr_copy(&fe->vxlfe_raddr, sa); 771 } 772 773 static void 774 vxlan_ftable_entry_destroy(struct vxlan_softc *sc, 775 struct vxlan_ftable_entry *fe) 776 { 777 778 sc->vxl_ftable_cnt--; 779 LIST_REMOVE(fe, vxlfe_hash); 780 vxlan_ftable_entry_free(fe); 781 } 782 783 static int 784 vxlan_ftable_entry_insert(struct vxlan_softc *sc, 785 struct vxlan_ftable_entry *fe) 786 { 787 struct vxlan_ftable_entry *lfe; 788 uint32_t hash; 789 int dir; 790 791 VXLAN_LOCK_WASSERT(sc); 792 hash = VXLAN_SC_FTABLE_HASH(sc, fe->vxlfe_mac); 793 794 lfe = LIST_FIRST(&sc->vxl_ftable[hash]); 795 if (lfe == NULL) { 796 LIST_INSERT_HEAD(&sc->vxl_ftable[hash], fe, vxlfe_hash); 797 goto out; 798 } 799 800 do { 801 dir = vxlan_ftable_addr_cmp(fe->vxlfe_mac, lfe->vxlfe_mac); 802 if (dir == 0) 803 return (EEXIST); 804 if (dir > 0) { 805 LIST_INSERT_BEFORE(lfe, fe, vxlfe_hash); 806 goto out; 807 } else if (LIST_NEXT(lfe, vxlfe_hash) == NULL) { 808 LIST_INSERT_AFTER(lfe, fe, vxlfe_hash); 809 goto out; 810 } else 811 lfe = LIST_NEXT(lfe, vxlfe_hash); 812 } while (lfe != NULL); 813 814 out: 815 sc->vxl_ftable_cnt++; 816 817 return (0); 818 } 819 820 static struct vxlan_ftable_entry * 821 vxlan_ftable_entry_lookup(struct vxlan_softc *sc, const uint8_t *mac) 822 { 823 struct vxlan_ftable_entry *fe; 824 uint32_t hash; 825 int dir; 826 827 VXLAN_LOCK_ASSERT(sc); 828 hash = VXLAN_SC_FTABLE_HASH(sc, mac); 829 830 LIST_FOREACH(fe, &sc->vxl_ftable[hash], vxlfe_hash) { 831 dir = vxlan_ftable_addr_cmp(mac, fe->vxlfe_mac); 832 if (dir == 0) 833 return (fe); 834 if (dir > 0) 835 break; 836 } 837 838 return (NULL); 839 } 840 841 static void 842 vxlan_ftable_entry_dump(struct vxlan_ftable_entry *fe, struct sbuf *sb) 843 { 844 char buf[64]; 845 const union vxlan_sockaddr *sa; 846 const void *addr; 847 int i, len, af, width; 848 849 sa = &fe->vxlfe_raddr; 850 af = sa->sa.sa_family; 851 len = sbuf_len(sb); 852 853 sbuf_printf(sb, "%c 0x%02X ", VXLAN_FE_IS_DYNAMIC(fe) ? 'D' : 'S', 854 fe->vxlfe_flags); 855 856 for (i = 0; i < ETHER_ADDR_LEN - 1; i++) 857 sbuf_printf(sb, "%02X:", fe->vxlfe_mac[i]); 858 sbuf_printf(sb, "%02X ", fe->vxlfe_mac[i]); 859 860 if (af == AF_INET) { 861 addr = &sa->in4.sin_addr; 862 width = INET_ADDRSTRLEN - 1; 863 } else { 864 addr = &sa->in6.sin6_addr; 865 width = INET6_ADDRSTRLEN - 1; 866 } 867 inet_ntop(af, addr, buf, sizeof(buf)); 868 sbuf_printf(sb, "%*s ", width, buf); 869 870 sbuf_printf(sb, "%08jd", (intmax_t)fe->vxlfe_expire); 871 872 sbuf_putc(sb, '\n'); 873 874 /* Truncate a partial line. */ 875 if (sbuf_error(sb) != 0) 876 sbuf_setpos(sb, len); 877 } 878 879 static struct vxlan_socket * 880 vxlan_socket_alloc(const union vxlan_sockaddr *sa) 881 { 882 struct vxlan_socket *vso; 883 int i; 884 885 vso = malloc(sizeof(*vso), M_VXLAN, M_WAITOK | M_ZERO); 886 rm_init(&vso->vxlso_lock, "vxlansorm"); 887 refcount_init(&vso->vxlso_refcnt, 0); 888 for (i = 0; i < VXLAN_SO_VNI_HASH_SIZE; i++) 889 LIST_INIT(&vso->vxlso_vni_hash[i]); 890 vso->vxlso_laddr = *sa; 891 892 return (vso); 893 } 894 895 static void 896 vxlan_socket_destroy(struct vxlan_socket *vso) 897 { 898 struct socket *so; 899 #ifdef INVARIANTS 900 int i; 901 struct vxlan_socket_mc_info *mc; 902 903 for (i = 0; i < VXLAN_SO_MC_MAX_GROUPS; i++) { 904 mc = &vso->vxlso_mc[i]; 905 KASSERT(mc->vxlsomc_gaddr.sa.sa_family == AF_UNSPEC, 906 ("%s: socket %p mc[%d] still has address", 907 __func__, vso, i)); 908 } 909 910 for (i = 0; i < VXLAN_SO_VNI_HASH_SIZE; i++) { 911 KASSERT(LIST_EMPTY(&vso->vxlso_vni_hash[i]), 912 ("%s: socket %p vni_hash[%d] not empty", 913 __func__, vso, i)); 914 } 915 #endif 916 so = vso->vxlso_sock; 917 if (so != NULL) { 918 vso->vxlso_sock = NULL; 919 soclose(so); 920 } 921 922 rm_destroy(&vso->vxlso_lock); 923 free(vso, M_VXLAN); 924 } 925 926 static void 927 vxlan_socket_release(struct vxlan_socket *vso) 928 { 929 int destroy; 930 931 VXLAN_LIST_LOCK(); 932 destroy = VXLAN_SO_RELEASE(vso); 933 if (destroy != 0) 934 LIST_REMOVE(vso, vxlso_entry); 935 VXLAN_LIST_UNLOCK(); 936 937 if (destroy != 0) 938 vxlan_socket_destroy(vso); 939 } 940 941 static struct vxlan_socket * 942 vxlan_socket_lookup(union vxlan_sockaddr *vxlsa) 943 { 944 struct vxlan_socket *vso; 945 946 VXLAN_LIST_LOCK(); 947 LIST_FOREACH(vso, &vxlan_socket_list, vxlso_entry) { 948 if (vxlan_sockaddr_cmp(&vso->vxlso_laddr, &vxlsa->sa) == 0) { 949 VXLAN_SO_ACQUIRE(vso); 950 break; 951 } 952 } 953 VXLAN_LIST_UNLOCK(); 954 955 return (vso); 956 } 957 958 static void 959 vxlan_socket_insert(struct vxlan_socket *vso) 960 { 961 962 VXLAN_LIST_LOCK(); 963 VXLAN_SO_ACQUIRE(vso); 964 LIST_INSERT_HEAD(&vxlan_socket_list, vso, vxlso_entry); 965 VXLAN_LIST_UNLOCK(); 966 } 967 968 static int 969 vxlan_socket_init(struct vxlan_socket *vso, struct ifnet *ifp) 970 { 971 struct thread *td; 972 int error; 973 974 td = curthread; 975 976 error = socreate(vso->vxlso_laddr.sa.sa_family, &vso->vxlso_sock, 977 SOCK_DGRAM, IPPROTO_UDP, td->td_ucred, td); 978 if (error) { 979 if_printf(ifp, "cannot create socket: %d\n", error); 980 return (error); 981 } 982 983 error = udp_set_kernel_tunneling(vso->vxlso_sock, 984 vxlan_rcv_udp_packet, NULL, vso); 985 if (error) { 986 if_printf(ifp, "cannot set tunneling function: %d\n", error); 987 return (error); 988 } 989 990 if (vxlan_reuse_port != 0) { 991 struct sockopt sopt; 992 int val = 1; 993 994 bzero(&sopt, sizeof(sopt)); 995 sopt.sopt_dir = SOPT_SET; 996 sopt.sopt_level = IPPROTO_IP; 997 sopt.sopt_name = SO_REUSEPORT; 998 sopt.sopt_val = &val; 999 sopt.sopt_valsize = sizeof(val); 1000 error = sosetopt(vso->vxlso_sock, &sopt); 1001 if (error) { 1002 if_printf(ifp, 1003 "cannot set REUSEADDR socket opt: %d\n", error); 1004 return (error); 1005 } 1006 } 1007 1008 return (0); 1009 } 1010 1011 static int 1012 vxlan_socket_bind(struct vxlan_socket *vso, struct ifnet *ifp) 1013 { 1014 union vxlan_sockaddr laddr; 1015 struct thread *td; 1016 int error; 1017 1018 td = curthread; 1019 laddr = vso->vxlso_laddr; 1020 1021 error = sobind(vso->vxlso_sock, &laddr.sa, td); 1022 if (error) { 1023 if (error != EADDRINUSE) 1024 if_printf(ifp, "cannot bind socket: %d\n", error); 1025 return (error); 1026 } 1027 1028 return (0); 1029 } 1030 1031 static int 1032 vxlan_socket_create(struct ifnet *ifp, int multicast, 1033 const union vxlan_sockaddr *saddr, struct vxlan_socket **vsop) 1034 { 1035 union vxlan_sockaddr laddr; 1036 struct vxlan_socket *vso; 1037 int error; 1038 1039 laddr = *saddr; 1040 1041 /* 1042 * If this socket will be multicast, then only the local port 1043 * must be specified when binding. 1044 */ 1045 if (multicast != 0) { 1046 if (VXLAN_SOCKADDR_IS_IPV4(&laddr)) 1047 laddr.in4.sin_addr.s_addr = INADDR_ANY; 1048 #ifdef INET6 1049 else 1050 laddr.in6.sin6_addr = in6addr_any; 1051 #endif 1052 } 1053 1054 vso = vxlan_socket_alloc(&laddr); 1055 if (vso == NULL) 1056 return (ENOMEM); 1057 1058 error = vxlan_socket_init(vso, ifp); 1059 if (error) 1060 goto fail; 1061 1062 error = vxlan_socket_bind(vso, ifp); 1063 if (error) 1064 goto fail; 1065 1066 /* 1067 * There is a small window between the bind completing and 1068 * inserting the socket, so that a concurrent create may fail. 1069 * Let's not worry about that for now. 1070 */ 1071 vxlan_socket_insert(vso); 1072 *vsop = vso; 1073 1074 return (0); 1075 1076 fail: 1077 vxlan_socket_destroy(vso); 1078 1079 return (error); 1080 } 1081 1082 static void 1083 vxlan_socket_ifdetach(struct vxlan_socket *vso, struct ifnet *ifp, 1084 struct vxlan_softc_head *list) 1085 { 1086 struct rm_priotracker tracker; 1087 struct vxlan_softc *sc; 1088 int i; 1089 1090 VXLAN_SO_RLOCK(vso, &tracker); 1091 for (i = 0; i < VXLAN_SO_VNI_HASH_SIZE; i++) { 1092 LIST_FOREACH(sc, &vso->vxlso_vni_hash[i], vxl_entry) 1093 vxlan_ifdetach(sc, ifp, list); 1094 } 1095 VXLAN_SO_RUNLOCK(vso, &tracker); 1096 } 1097 1098 static struct vxlan_socket * 1099 vxlan_socket_mc_lookup(const union vxlan_sockaddr *vxlsa) 1100 { 1101 union vxlan_sockaddr laddr; 1102 struct vxlan_socket *vso; 1103 1104 laddr = *vxlsa; 1105 1106 if (VXLAN_SOCKADDR_IS_IPV4(&laddr)) 1107 laddr.in4.sin_addr.s_addr = INADDR_ANY; 1108 #ifdef INET6 1109 else 1110 laddr.in6.sin6_addr = in6addr_any; 1111 #endif 1112 1113 vso = vxlan_socket_lookup(&laddr); 1114 1115 return (vso); 1116 } 1117 1118 static int 1119 vxlan_sockaddr_mc_info_match(const struct vxlan_socket_mc_info *mc, 1120 const union vxlan_sockaddr *group, const union vxlan_sockaddr *local, 1121 int ifidx) 1122 { 1123 1124 if (!vxlan_sockaddr_in_any(local) && 1125 !vxlan_sockaddr_in_equal(&mc->vxlsomc_saddr, &local->sa)) 1126 return (0); 1127 if (!vxlan_sockaddr_in_equal(&mc->vxlsomc_gaddr, &group->sa)) 1128 return (0); 1129 if (ifidx != 0 && ifidx != mc->vxlsomc_ifidx) 1130 return (0); 1131 1132 return (1); 1133 } 1134 1135 static int 1136 vxlan_socket_mc_join_group(struct vxlan_socket *vso, 1137 const union vxlan_sockaddr *group, const union vxlan_sockaddr *local, 1138 int *ifidx, union vxlan_sockaddr *source) 1139 { 1140 struct sockopt sopt; 1141 int error; 1142 1143 *source = *local; 1144 1145 if (VXLAN_SOCKADDR_IS_IPV4(group)) { 1146 struct ip_mreq mreq; 1147 1148 mreq.imr_multiaddr = group->in4.sin_addr; 1149 mreq.imr_interface = local->in4.sin_addr; 1150 1151 bzero(&sopt, sizeof(sopt)); 1152 sopt.sopt_dir = SOPT_SET; 1153 sopt.sopt_level = IPPROTO_IP; 1154 sopt.sopt_name = IP_ADD_MEMBERSHIP; 1155 sopt.sopt_val = &mreq; 1156 sopt.sopt_valsize = sizeof(mreq); 1157 error = sosetopt(vso->vxlso_sock, &sopt); 1158 if (error) 1159 return (error); 1160 1161 /* 1162 * BMV: Ideally, there would be a formal way for us to get 1163 * the local interface that was selected based on the 1164 * imr_interface address. We could then update *ifidx so 1165 * vxlan_sockaddr_mc_info_match() would return a match for 1166 * later creates that explicitly set the multicast interface. 1167 * 1168 * If we really need to, we can of course look in the INP's 1169 * membership list: 1170 * sotoinpcb(vso->vxlso_sock)->inp_moptions-> 1171 * imo_head[]->imf_inm->inm_ifp 1172 * similarly to imo_match_group(). 1173 */ 1174 source->in4.sin_addr = local->in4.sin_addr; 1175 1176 } else if (VXLAN_SOCKADDR_IS_IPV6(group)) { 1177 struct ipv6_mreq mreq; 1178 1179 mreq.ipv6mr_multiaddr = group->in6.sin6_addr; 1180 mreq.ipv6mr_interface = *ifidx; 1181 1182 bzero(&sopt, sizeof(sopt)); 1183 sopt.sopt_dir = SOPT_SET; 1184 sopt.sopt_level = IPPROTO_IPV6; 1185 sopt.sopt_name = IPV6_JOIN_GROUP; 1186 sopt.sopt_val = &mreq; 1187 sopt.sopt_valsize = sizeof(mreq); 1188 error = sosetopt(vso->vxlso_sock, &sopt); 1189 if (error) 1190 return (error); 1191 1192 /* 1193 * BMV: As with IPv4, we would really like to know what 1194 * interface in6p_lookup_mcast_ifp() selected. 1195 */ 1196 } else 1197 error = EAFNOSUPPORT; 1198 1199 return (error); 1200 } 1201 1202 static int 1203 vxlan_socket_mc_leave_group(struct vxlan_socket *vso, 1204 const union vxlan_sockaddr *group, const union vxlan_sockaddr *source, 1205 int ifidx) 1206 { 1207 struct sockopt sopt; 1208 int error; 1209 1210 bzero(&sopt, sizeof(sopt)); 1211 sopt.sopt_dir = SOPT_SET; 1212 1213 if (VXLAN_SOCKADDR_IS_IPV4(group)) { 1214 struct ip_mreq mreq; 1215 1216 mreq.imr_multiaddr = group->in4.sin_addr; 1217 mreq.imr_interface = source->in4.sin_addr; 1218 1219 sopt.sopt_level = IPPROTO_IP; 1220 sopt.sopt_name = IP_DROP_MEMBERSHIP; 1221 sopt.sopt_val = &mreq; 1222 sopt.sopt_valsize = sizeof(mreq); 1223 error = sosetopt(vso->vxlso_sock, &sopt); 1224 1225 } else if (VXLAN_SOCKADDR_IS_IPV6(group)) { 1226 struct ipv6_mreq mreq; 1227 1228 mreq.ipv6mr_multiaddr = group->in6.sin6_addr; 1229 mreq.ipv6mr_interface = ifidx; 1230 1231 sopt.sopt_level = IPPROTO_IPV6; 1232 sopt.sopt_name = IPV6_LEAVE_GROUP; 1233 sopt.sopt_val = &mreq; 1234 sopt.sopt_valsize = sizeof(mreq); 1235 error = sosetopt(vso->vxlso_sock, &sopt); 1236 1237 } else 1238 error = EAFNOSUPPORT; 1239 1240 return (error); 1241 } 1242 1243 static int 1244 vxlan_socket_mc_add_group(struct vxlan_socket *vso, 1245 const union vxlan_sockaddr *group, const union vxlan_sockaddr *local, 1246 int ifidx, int *idx) 1247 { 1248 union vxlan_sockaddr source; 1249 struct vxlan_socket_mc_info *mc; 1250 int i, empty, error; 1251 1252 /* 1253 * Within a socket, the same multicast group may be used by multiple 1254 * interfaces, each with a different network identifier. But a socket 1255 * may only join a multicast group once, so keep track of the users 1256 * here. 1257 */ 1258 1259 VXLAN_SO_WLOCK(vso); 1260 for (empty = 0, i = 0; i < VXLAN_SO_MC_MAX_GROUPS; i++) { 1261 mc = &vso->vxlso_mc[i]; 1262 1263 if (mc->vxlsomc_gaddr.sa.sa_family == AF_UNSPEC) { 1264 empty++; 1265 continue; 1266 } 1267 1268 if (vxlan_sockaddr_mc_info_match(mc, group, local, ifidx)) 1269 goto out; 1270 } 1271 VXLAN_SO_WUNLOCK(vso); 1272 1273 if (empty == 0) 1274 return (ENOSPC); 1275 1276 error = vxlan_socket_mc_join_group(vso, group, local, &ifidx, &source); 1277 if (error) 1278 return (error); 1279 1280 VXLAN_SO_WLOCK(vso); 1281 for (i = 0; i < VXLAN_SO_MC_MAX_GROUPS; i++) { 1282 mc = &vso->vxlso_mc[i]; 1283 1284 if (mc->vxlsomc_gaddr.sa.sa_family == AF_UNSPEC) { 1285 vxlan_sockaddr_copy(&mc->vxlsomc_gaddr, &group->sa); 1286 vxlan_sockaddr_copy(&mc->vxlsomc_saddr, &source.sa); 1287 mc->vxlsomc_ifidx = ifidx; 1288 goto out; 1289 } 1290 } 1291 VXLAN_SO_WUNLOCK(vso); 1292 1293 error = vxlan_socket_mc_leave_group(vso, group, &source, ifidx); 1294 MPASS(error == 0); 1295 1296 return (ENOSPC); 1297 1298 out: 1299 mc->vxlsomc_users++; 1300 VXLAN_SO_WUNLOCK(vso); 1301 1302 *idx = i; 1303 1304 return (0); 1305 } 1306 1307 static void 1308 vxlan_socket_mc_release_group_by_idx(struct vxlan_socket *vso, int idx) 1309 { 1310 union vxlan_sockaddr group, source; 1311 struct vxlan_socket_mc_info *mc; 1312 int ifidx, leave; 1313 1314 KASSERT(idx >= 0 && idx < VXLAN_SO_MC_MAX_GROUPS, 1315 ("%s: vso %p idx %d out of bounds", __func__, vso, idx)); 1316 1317 leave = 0; 1318 mc = &vso->vxlso_mc[idx]; 1319 1320 VXLAN_SO_WLOCK(vso); 1321 mc->vxlsomc_users--; 1322 if (mc->vxlsomc_users == 0) { 1323 group = mc->vxlsomc_gaddr; 1324 source = mc->vxlsomc_saddr; 1325 ifidx = mc->vxlsomc_ifidx; 1326 bzero(mc, sizeof(*mc)); 1327 leave = 1; 1328 } 1329 VXLAN_SO_WUNLOCK(vso); 1330 1331 if (leave != 0) { 1332 /* 1333 * Our socket's membership in this group may have already 1334 * been removed if we joined through an interface that's 1335 * been detached. 1336 */ 1337 vxlan_socket_mc_leave_group(vso, &group, &source, ifidx); 1338 } 1339 } 1340 1341 static struct vxlan_softc * 1342 vxlan_socket_lookup_softc_locked(struct vxlan_socket *vso, uint32_t vni) 1343 { 1344 struct vxlan_softc *sc; 1345 uint32_t hash; 1346 1347 VXLAN_SO_LOCK_ASSERT(vso); 1348 hash = VXLAN_SO_VNI_HASH(vni); 1349 1350 LIST_FOREACH(sc, &vso->vxlso_vni_hash[hash], vxl_entry) { 1351 if (sc->vxl_vni == vni) { 1352 VXLAN_ACQUIRE(sc); 1353 break; 1354 } 1355 } 1356 1357 return (sc); 1358 } 1359 1360 static struct vxlan_softc * 1361 vxlan_socket_lookup_softc(struct vxlan_socket *vso, uint32_t vni) 1362 { 1363 struct rm_priotracker tracker; 1364 struct vxlan_softc *sc; 1365 1366 VXLAN_SO_RLOCK(vso, &tracker); 1367 sc = vxlan_socket_lookup_softc_locked(vso, vni); 1368 VXLAN_SO_RUNLOCK(vso, &tracker); 1369 1370 return (sc); 1371 } 1372 1373 static int 1374 vxlan_socket_insert_softc(struct vxlan_socket *vso, struct vxlan_softc *sc) 1375 { 1376 struct vxlan_softc *tsc; 1377 uint32_t vni, hash; 1378 1379 vni = sc->vxl_vni; 1380 hash = VXLAN_SO_VNI_HASH(vni); 1381 1382 VXLAN_SO_WLOCK(vso); 1383 tsc = vxlan_socket_lookup_softc_locked(vso, vni); 1384 if (tsc != NULL) { 1385 VXLAN_SO_WUNLOCK(vso); 1386 vxlan_release(tsc); 1387 return (EEXIST); 1388 } 1389 1390 VXLAN_ACQUIRE(sc); 1391 LIST_INSERT_HEAD(&vso->vxlso_vni_hash[hash], sc, vxl_entry); 1392 VXLAN_SO_WUNLOCK(vso); 1393 1394 return (0); 1395 } 1396 1397 static void 1398 vxlan_socket_remove_softc(struct vxlan_socket *vso, struct vxlan_softc *sc) 1399 { 1400 1401 VXLAN_SO_WLOCK(vso); 1402 LIST_REMOVE(sc, vxl_entry); 1403 VXLAN_SO_WUNLOCK(vso); 1404 1405 vxlan_release(sc); 1406 } 1407 1408 static struct ifnet * 1409 vxlan_multicast_if_ref(struct vxlan_softc *sc, int ipv4) 1410 { 1411 struct ifnet *ifp; 1412 1413 VXLAN_LOCK_ASSERT(sc); 1414 1415 if (ipv4 && sc->vxl_im4o != NULL) 1416 ifp = sc->vxl_im4o->imo_multicast_ifp; 1417 else if (!ipv4 && sc->vxl_im6o != NULL) 1418 ifp = sc->vxl_im6o->im6o_multicast_ifp; 1419 else 1420 ifp = NULL; 1421 1422 if (ifp != NULL) 1423 if_ref(ifp); 1424 1425 return (ifp); 1426 } 1427 1428 static void 1429 vxlan_free_multicast(struct vxlan_softc *sc) 1430 { 1431 1432 if (sc->vxl_mc_ifp != NULL) { 1433 if_rele(sc->vxl_mc_ifp); 1434 sc->vxl_mc_ifp = NULL; 1435 sc->vxl_mc_ifindex = 0; 1436 } 1437 1438 if (sc->vxl_im4o != NULL) { 1439 free(sc->vxl_im4o, M_VXLAN); 1440 sc->vxl_im4o = NULL; 1441 } 1442 1443 if (sc->vxl_im6o != NULL) { 1444 free(sc->vxl_im6o, M_VXLAN); 1445 sc->vxl_im6o = NULL; 1446 } 1447 } 1448 1449 static int 1450 vxlan_setup_multicast_interface(struct vxlan_softc *sc) 1451 { 1452 struct ifnet *ifp; 1453 1454 ifp = ifunit_ref(sc->vxl_mc_ifname); 1455 if (ifp == NULL) { 1456 if_printf(sc->vxl_ifp, "multicast interface %s does " 1457 "not exist\n", sc->vxl_mc_ifname); 1458 return (ENOENT); 1459 } 1460 1461 if ((ifp->if_flags & IFF_MULTICAST) == 0) { 1462 if_printf(sc->vxl_ifp, "interface %s does not support " 1463 "multicast\n", sc->vxl_mc_ifname); 1464 if_rele(ifp); 1465 return (ENOTSUP); 1466 } 1467 1468 sc->vxl_mc_ifp = ifp; 1469 sc->vxl_mc_ifindex = ifp->if_index; 1470 1471 return (0); 1472 } 1473 1474 static int 1475 vxlan_setup_multicast(struct vxlan_softc *sc) 1476 { 1477 const union vxlan_sockaddr *group; 1478 int error; 1479 1480 group = &sc->vxl_dst_addr; 1481 error = 0; 1482 1483 if (sc->vxl_mc_ifname[0] != '\0') { 1484 error = vxlan_setup_multicast_interface(sc); 1485 if (error) 1486 return (error); 1487 } 1488 1489 /* 1490 * Initialize an multicast options structure that is sufficiently 1491 * populated for use in the respective IP output routine. This 1492 * structure is typically stored in the socket, but our sockets 1493 * may be shared among multiple interfaces. 1494 */ 1495 if (VXLAN_SOCKADDR_IS_IPV4(group)) { 1496 sc->vxl_im4o = malloc(sizeof(struct ip_moptions), M_VXLAN, 1497 M_ZERO | M_WAITOK); 1498 sc->vxl_im4o->imo_multicast_ifp = sc->vxl_mc_ifp; 1499 sc->vxl_im4o->imo_multicast_ttl = sc->vxl_ttl; 1500 sc->vxl_im4o->imo_multicast_vif = -1; 1501 } else if (VXLAN_SOCKADDR_IS_IPV6(group)) { 1502 sc->vxl_im6o = malloc(sizeof(struct ip6_moptions), M_VXLAN, 1503 M_ZERO | M_WAITOK); 1504 sc->vxl_im6o->im6o_multicast_ifp = sc->vxl_mc_ifp; 1505 sc->vxl_im6o->im6o_multicast_hlim = sc->vxl_ttl; 1506 } 1507 1508 return (error); 1509 } 1510 1511 static int 1512 vxlan_setup_socket(struct vxlan_softc *sc) 1513 { 1514 struct vxlan_socket *vso; 1515 struct ifnet *ifp; 1516 union vxlan_sockaddr *saddr, *daddr; 1517 int multicast, error; 1518 1519 vso = NULL; 1520 ifp = sc->vxl_ifp; 1521 saddr = &sc->vxl_src_addr; 1522 daddr = &sc->vxl_dst_addr; 1523 1524 multicast = vxlan_sockaddr_in_multicast(daddr); 1525 MPASS(multicast != -1); 1526 sc->vxl_vso_mc_index = -1; 1527 1528 /* 1529 * Try to create the socket. If that fails, attempt to use an 1530 * existing socket. 1531 */ 1532 error = vxlan_socket_create(ifp, multicast, saddr, &vso); 1533 if (error) { 1534 if (multicast != 0) 1535 vso = vxlan_socket_mc_lookup(saddr); 1536 else 1537 vso = vxlan_socket_lookup(saddr); 1538 1539 if (vso == NULL) { 1540 if_printf(ifp, "cannot create socket (error: %d), " 1541 "and no existing socket found\n", error); 1542 goto out; 1543 } 1544 } 1545 1546 if (multicast != 0) { 1547 error = vxlan_setup_multicast(sc); 1548 if (error) 1549 goto out; 1550 1551 error = vxlan_socket_mc_add_group(vso, daddr, saddr, 1552 sc->vxl_mc_ifindex, &sc->vxl_vso_mc_index); 1553 if (error) 1554 goto out; 1555 } 1556 1557 sc->vxl_sock = vso; 1558 error = vxlan_socket_insert_softc(vso, sc); 1559 if (error) { 1560 sc->vxl_sock = NULL; 1561 if_printf(ifp, "network identifier %d already exists in " 1562 "this socket\n", sc->vxl_vni); 1563 goto out; 1564 } 1565 1566 return (0); 1567 1568 out: 1569 if (vso != NULL) { 1570 if (sc->vxl_vso_mc_index != -1) { 1571 vxlan_socket_mc_release_group_by_idx(vso, 1572 sc->vxl_vso_mc_index); 1573 sc->vxl_vso_mc_index = -1; 1574 } 1575 if (multicast != 0) 1576 vxlan_free_multicast(sc); 1577 vxlan_socket_release(vso); 1578 } 1579 1580 return (error); 1581 } 1582 1583 #ifdef INET6 1584 static void 1585 vxlan_setup_zero_checksum_port(struct vxlan_softc *sc) 1586 { 1587 1588 if (!VXLAN_SOCKADDR_IS_IPV6(&sc->vxl_src_addr)) 1589 return; 1590 1591 MPASS(sc->vxl_src_addr.in6.sin6_port != 0); 1592 MPASS(sc->vxl_dst_addr.in6.sin6_port != 0); 1593 1594 if (sc->vxl_src_addr.in6.sin6_port != sc->vxl_dst_addr.in6.sin6_port) { 1595 if_printf(sc->vxl_ifp, "port %d in src address does not match " 1596 "port %d in dst address, rfc6935_port (%d) not updated.\n", 1597 ntohs(sc->vxl_src_addr.in6.sin6_port), 1598 ntohs(sc->vxl_dst_addr.in6.sin6_port), 1599 V_zero_checksum_port); 1600 return; 1601 } 1602 1603 if (V_zero_checksum_port != 0) { 1604 if (V_zero_checksum_port != 1605 ntohs(sc->vxl_src_addr.in6.sin6_port)) { 1606 if_printf(sc->vxl_ifp, "rfc6935_port is already set to " 1607 "%d, cannot set it to %d.\n", V_zero_checksum_port, 1608 ntohs(sc->vxl_src_addr.in6.sin6_port)); 1609 } 1610 return; 1611 } 1612 1613 V_zero_checksum_port = ntohs(sc->vxl_src_addr.in6.sin6_port); 1614 if_printf(sc->vxl_ifp, "rfc6935_port set to %d\n", 1615 V_zero_checksum_port); 1616 } 1617 #endif 1618 1619 static void 1620 vxlan_setup_interface_hdrlen(struct vxlan_softc *sc) 1621 { 1622 struct ifnet *ifp; 1623 1624 VXLAN_LOCK_WASSERT(sc); 1625 1626 ifp = sc->vxl_ifp; 1627 ifp->if_hdrlen = ETHER_HDR_LEN + sizeof(struct vxlanudphdr); 1628 1629 if (VXLAN_SOCKADDR_IS_IPV4(&sc->vxl_dst_addr) != 0) 1630 ifp->if_hdrlen += sizeof(struct ip); 1631 else if (VXLAN_SOCKADDR_IS_IPV6(&sc->vxl_dst_addr) != 0) 1632 ifp->if_hdrlen += sizeof(struct ip6_hdr); 1633 1634 if ((sc->vxl_flags & VXLAN_FLAG_USER_MTU) == 0) 1635 ifp->if_mtu = ETHERMTU - ifp->if_hdrlen; 1636 } 1637 1638 static int 1639 vxlan_valid_init_config(struct vxlan_softc *sc) 1640 { 1641 const char *reason; 1642 1643 if (vxlan_check_vni(sc->vxl_vni) != 0) { 1644 reason = "invalid virtual network identifier specified"; 1645 goto fail; 1646 } 1647 1648 if (vxlan_sockaddr_supported(&sc->vxl_src_addr, 1) == 0) { 1649 reason = "source address type is not supported"; 1650 goto fail; 1651 } 1652 1653 if (vxlan_sockaddr_supported(&sc->vxl_dst_addr, 0) == 0) { 1654 reason = "destination address type is not supported"; 1655 goto fail; 1656 } 1657 1658 if (vxlan_sockaddr_in_any(&sc->vxl_dst_addr) != 0) { 1659 reason = "no valid destination address specified"; 1660 goto fail; 1661 } 1662 1663 if (vxlan_sockaddr_in_multicast(&sc->vxl_dst_addr) == 0 && 1664 sc->vxl_mc_ifname[0] != '\0') { 1665 reason = "can only specify interface with a group address"; 1666 goto fail; 1667 } 1668 1669 if (vxlan_sockaddr_in_any(&sc->vxl_src_addr) == 0) { 1670 if (VXLAN_SOCKADDR_IS_IPV4(&sc->vxl_src_addr) ^ 1671 VXLAN_SOCKADDR_IS_IPV4(&sc->vxl_dst_addr)) { 1672 reason = "source and destination address must both " 1673 "be either IPv4 or IPv6"; 1674 goto fail; 1675 } 1676 } 1677 1678 if (sc->vxl_src_addr.in4.sin_port == 0) { 1679 reason = "local port not specified"; 1680 goto fail; 1681 } 1682 1683 if (sc->vxl_dst_addr.in4.sin_port == 0) { 1684 reason = "remote port not specified"; 1685 goto fail; 1686 } 1687 1688 return (0); 1689 1690 fail: 1691 if_printf(sc->vxl_ifp, "cannot initialize interface: %s\n", reason); 1692 return (EINVAL); 1693 } 1694 1695 static void 1696 vxlan_init_wait(struct vxlan_softc *sc) 1697 { 1698 1699 VXLAN_LOCK_WASSERT(sc); 1700 while (sc->vxl_flags & VXLAN_FLAG_INIT) 1701 rm_sleep(sc, &sc->vxl_lock, 0, "vxlint", hz); 1702 } 1703 1704 static void 1705 vxlan_init_complete(struct vxlan_softc *sc) 1706 { 1707 1708 VXLAN_WLOCK(sc); 1709 sc->vxl_flags &= ~VXLAN_FLAG_INIT; 1710 wakeup(sc); 1711 VXLAN_WUNLOCK(sc); 1712 } 1713 1714 static void 1715 vxlan_init(void *xsc) 1716 { 1717 static const uint8_t empty_mac[ETHER_ADDR_LEN]; 1718 struct vxlan_softc *sc; 1719 struct ifnet *ifp; 1720 1721 sc = xsc; 1722 ifp = sc->vxl_ifp; 1723 1724 sx_xlock(&vxlan_sx); 1725 VXLAN_WLOCK(sc); 1726 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 1727 VXLAN_WUNLOCK(sc); 1728 sx_xunlock(&vxlan_sx); 1729 return; 1730 } 1731 sc->vxl_flags |= VXLAN_FLAG_INIT; 1732 VXLAN_WUNLOCK(sc); 1733 1734 if (vxlan_valid_init_config(sc) != 0) 1735 goto out; 1736 1737 if (vxlan_setup_socket(sc) != 0) 1738 goto out; 1739 1740 #ifdef INET6 1741 vxlan_setup_zero_checksum_port(sc); 1742 #endif 1743 1744 /* Initialize the default forwarding entry. */ 1745 vxlan_ftable_entry_init(sc, &sc->vxl_default_fe, empty_mac, 1746 &sc->vxl_dst_addr.sa, VXLAN_FE_FLAG_STATIC); 1747 1748 VXLAN_WLOCK(sc); 1749 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1750 callout_reset(&sc->vxl_callout, vxlan_ftable_prune_period * hz, 1751 vxlan_timer, sc); 1752 VXLAN_WUNLOCK(sc); 1753 1754 if_link_state_change(ifp, LINK_STATE_UP); 1755 1756 EVENTHANDLER_INVOKE(vxlan_start, ifp, sc->vxl_src_addr.in4.sin_family, 1757 ntohs(sc->vxl_src_addr.in4.sin_port)); 1758 out: 1759 vxlan_init_complete(sc); 1760 sx_xunlock(&vxlan_sx); 1761 } 1762 1763 static void 1764 vxlan_release(struct vxlan_softc *sc) 1765 { 1766 1767 /* 1768 * The softc may be destroyed as soon as we release our reference, 1769 * so we cannot serialize the wakeup with the softc lock. We use a 1770 * timeout in our sleeps so a missed wakeup is unfortunate but not 1771 * fatal. 1772 */ 1773 if (VXLAN_RELEASE(sc) != 0) 1774 wakeup(sc); 1775 } 1776 1777 static void 1778 vxlan_teardown_wait(struct vxlan_softc *sc) 1779 { 1780 1781 VXLAN_LOCK_WASSERT(sc); 1782 while (sc->vxl_flags & VXLAN_FLAG_TEARDOWN) 1783 rm_sleep(sc, &sc->vxl_lock, 0, "vxltrn", hz); 1784 } 1785 1786 static void 1787 vxlan_teardown_complete(struct vxlan_softc *sc) 1788 { 1789 1790 VXLAN_WLOCK(sc); 1791 sc->vxl_flags &= ~VXLAN_FLAG_TEARDOWN; 1792 wakeup(sc); 1793 VXLAN_WUNLOCK(sc); 1794 } 1795 1796 static void 1797 vxlan_teardown_locked(struct vxlan_softc *sc) 1798 { 1799 struct ifnet *ifp; 1800 struct vxlan_socket *vso; 1801 1802 sx_assert(&vxlan_sx, SA_XLOCKED); 1803 VXLAN_LOCK_WASSERT(sc); 1804 MPASS(sc->vxl_flags & VXLAN_FLAG_TEARDOWN); 1805 1806 ifp = sc->vxl_ifp; 1807 ifp->if_flags &= ~IFF_UP; 1808 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1809 callout_stop(&sc->vxl_callout); 1810 vso = sc->vxl_sock; 1811 sc->vxl_sock = NULL; 1812 1813 VXLAN_WUNLOCK(sc); 1814 if_link_state_change(ifp, LINK_STATE_DOWN); 1815 EVENTHANDLER_INVOKE(vxlan_stop, ifp, sc->vxl_src_addr.in4.sin_family, 1816 ntohs(sc->vxl_src_addr.in4.sin_port)); 1817 1818 if (vso != NULL) { 1819 vxlan_socket_remove_softc(vso, sc); 1820 1821 if (sc->vxl_vso_mc_index != -1) { 1822 vxlan_socket_mc_release_group_by_idx(vso, 1823 sc->vxl_vso_mc_index); 1824 sc->vxl_vso_mc_index = -1; 1825 } 1826 } 1827 1828 VXLAN_WLOCK(sc); 1829 while (sc->vxl_refcnt != 0) 1830 rm_sleep(sc, &sc->vxl_lock, 0, "vxldrn", hz); 1831 VXLAN_WUNLOCK(sc); 1832 1833 callout_drain(&sc->vxl_callout); 1834 1835 vxlan_free_multicast(sc); 1836 if (vso != NULL) 1837 vxlan_socket_release(vso); 1838 1839 vxlan_teardown_complete(sc); 1840 } 1841 1842 static void 1843 vxlan_teardown(struct vxlan_softc *sc) 1844 { 1845 1846 sx_xlock(&vxlan_sx); 1847 VXLAN_WLOCK(sc); 1848 if (sc->vxl_flags & VXLAN_FLAG_TEARDOWN) { 1849 vxlan_teardown_wait(sc); 1850 VXLAN_WUNLOCK(sc); 1851 sx_xunlock(&vxlan_sx); 1852 return; 1853 } 1854 1855 sc->vxl_flags |= VXLAN_FLAG_TEARDOWN; 1856 vxlan_teardown_locked(sc); 1857 sx_xunlock(&vxlan_sx); 1858 } 1859 1860 static void 1861 vxlan_ifdetach(struct vxlan_softc *sc, struct ifnet *ifp, 1862 struct vxlan_softc_head *list) 1863 { 1864 1865 VXLAN_WLOCK(sc); 1866 1867 if (sc->vxl_mc_ifp != ifp) 1868 goto out; 1869 if (sc->vxl_flags & VXLAN_FLAG_TEARDOWN) 1870 goto out; 1871 1872 sc->vxl_flags |= VXLAN_FLAG_TEARDOWN; 1873 LIST_INSERT_HEAD(list, sc, vxl_ifdetach_list); 1874 1875 out: 1876 VXLAN_WUNLOCK(sc); 1877 } 1878 1879 static void 1880 vxlan_timer(void *xsc) 1881 { 1882 struct vxlan_softc *sc; 1883 1884 sc = xsc; 1885 VXLAN_LOCK_WASSERT(sc); 1886 1887 vxlan_ftable_expire(sc); 1888 callout_schedule(&sc->vxl_callout, vxlan_ftable_prune_period * hz); 1889 } 1890 1891 static int 1892 vxlan_ioctl_ifflags(struct vxlan_softc *sc) 1893 { 1894 struct ifnet *ifp; 1895 1896 ifp = sc->vxl_ifp; 1897 1898 if (ifp->if_flags & IFF_UP) { 1899 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 1900 vxlan_init(sc); 1901 } else { 1902 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 1903 vxlan_teardown(sc); 1904 } 1905 1906 return (0); 1907 } 1908 1909 static int 1910 vxlan_ctrl_get_config(struct vxlan_softc *sc, void *arg) 1911 { 1912 struct rm_priotracker tracker; 1913 struct ifvxlancfg *cfg; 1914 1915 cfg = arg; 1916 bzero(cfg, sizeof(*cfg)); 1917 1918 VXLAN_RLOCK(sc, &tracker); 1919 cfg->vxlc_vni = sc->vxl_vni; 1920 memcpy(&cfg->vxlc_local_sa, &sc->vxl_src_addr, 1921 sizeof(union vxlan_sockaddr)); 1922 memcpy(&cfg->vxlc_remote_sa, &sc->vxl_dst_addr, 1923 sizeof(union vxlan_sockaddr)); 1924 cfg->vxlc_mc_ifindex = sc->vxl_mc_ifindex; 1925 cfg->vxlc_ftable_cnt = sc->vxl_ftable_cnt; 1926 cfg->vxlc_ftable_max = sc->vxl_ftable_max; 1927 cfg->vxlc_ftable_timeout = sc->vxl_ftable_timeout; 1928 cfg->vxlc_port_min = sc->vxl_min_port; 1929 cfg->vxlc_port_max = sc->vxl_max_port; 1930 cfg->vxlc_learn = (sc->vxl_flags & VXLAN_FLAG_LEARN) != 0; 1931 cfg->vxlc_ttl = sc->vxl_ttl; 1932 VXLAN_RUNLOCK(sc, &tracker); 1933 1934 #ifdef INET6 1935 if (VXLAN_SOCKADDR_IS_IPV6(&cfg->vxlc_local_sa)) 1936 sa6_recoverscope(&cfg->vxlc_local_sa.in6); 1937 if (VXLAN_SOCKADDR_IS_IPV6(&cfg->vxlc_remote_sa)) 1938 sa6_recoverscope(&cfg->vxlc_remote_sa.in6); 1939 #endif 1940 1941 return (0); 1942 } 1943 1944 static int 1945 vxlan_ctrl_set_vni(struct vxlan_softc *sc, void *arg) 1946 { 1947 struct ifvxlancmd *cmd; 1948 int error; 1949 1950 cmd = arg; 1951 1952 if (vxlan_check_vni(cmd->vxlcmd_vni) != 0) 1953 return (EINVAL); 1954 1955 VXLAN_WLOCK(sc); 1956 if (vxlan_can_change_config(sc)) { 1957 sc->vxl_vni = cmd->vxlcmd_vni; 1958 error = 0; 1959 } else 1960 error = EBUSY; 1961 VXLAN_WUNLOCK(sc); 1962 1963 return (error); 1964 } 1965 1966 static int 1967 vxlan_ctrl_set_local_addr(struct vxlan_softc *sc, void *arg) 1968 { 1969 struct ifvxlancmd *cmd; 1970 union vxlan_sockaddr *vxlsa; 1971 int error; 1972 1973 cmd = arg; 1974 vxlsa = &cmd->vxlcmd_sa; 1975 1976 if (!VXLAN_SOCKADDR_IS_IPV46(vxlsa)) 1977 return (EINVAL); 1978 if (vxlan_sockaddr_in_multicast(vxlsa) != 0) 1979 return (EINVAL); 1980 if (VXLAN_SOCKADDR_IS_IPV6(vxlsa)) { 1981 error = vxlan_sockaddr_in6_embedscope(vxlsa); 1982 if (error) 1983 return (error); 1984 } 1985 1986 VXLAN_WLOCK(sc); 1987 if (vxlan_can_change_config(sc)) { 1988 vxlan_sockaddr_in_copy(&sc->vxl_src_addr, &vxlsa->sa); 1989 vxlan_set_hwcaps(sc); 1990 error = 0; 1991 } else 1992 error = EBUSY; 1993 VXLAN_WUNLOCK(sc); 1994 1995 return (error); 1996 } 1997 1998 static int 1999 vxlan_ctrl_set_remote_addr(struct vxlan_softc *sc, void *arg) 2000 { 2001 struct ifvxlancmd *cmd; 2002 union vxlan_sockaddr *vxlsa; 2003 int error; 2004 2005 cmd = arg; 2006 vxlsa = &cmd->vxlcmd_sa; 2007 2008 if (!VXLAN_SOCKADDR_IS_IPV46(vxlsa)) 2009 return (EINVAL); 2010 if (VXLAN_SOCKADDR_IS_IPV6(vxlsa)) { 2011 error = vxlan_sockaddr_in6_embedscope(vxlsa); 2012 if (error) 2013 return (error); 2014 } 2015 2016 VXLAN_WLOCK(sc); 2017 if (vxlan_can_change_config(sc)) { 2018 vxlan_sockaddr_in_copy(&sc->vxl_dst_addr, &vxlsa->sa); 2019 vxlan_setup_interface_hdrlen(sc); 2020 error = 0; 2021 } else 2022 error = EBUSY; 2023 VXLAN_WUNLOCK(sc); 2024 2025 return (error); 2026 } 2027 2028 static int 2029 vxlan_ctrl_set_local_port(struct vxlan_softc *sc, void *arg) 2030 { 2031 struct ifvxlancmd *cmd; 2032 int error; 2033 2034 cmd = arg; 2035 2036 if (cmd->vxlcmd_port == 0) 2037 return (EINVAL); 2038 2039 VXLAN_WLOCK(sc); 2040 if (vxlan_can_change_config(sc)) { 2041 sc->vxl_src_addr.in4.sin_port = htons(cmd->vxlcmd_port); 2042 error = 0; 2043 } else 2044 error = EBUSY; 2045 VXLAN_WUNLOCK(sc); 2046 2047 return (error); 2048 } 2049 2050 static int 2051 vxlan_ctrl_set_remote_port(struct vxlan_softc *sc, void *arg) 2052 { 2053 struct ifvxlancmd *cmd; 2054 int error; 2055 2056 cmd = arg; 2057 2058 if (cmd->vxlcmd_port == 0) 2059 return (EINVAL); 2060 2061 VXLAN_WLOCK(sc); 2062 if (vxlan_can_change_config(sc)) { 2063 sc->vxl_dst_addr.in4.sin_port = htons(cmd->vxlcmd_port); 2064 error = 0; 2065 } else 2066 error = EBUSY; 2067 VXLAN_WUNLOCK(sc); 2068 2069 return (error); 2070 } 2071 2072 static int 2073 vxlan_ctrl_set_port_range(struct vxlan_softc *sc, void *arg) 2074 { 2075 struct ifvxlancmd *cmd; 2076 uint16_t min, max; 2077 int error; 2078 2079 cmd = arg; 2080 min = cmd->vxlcmd_port_min; 2081 max = cmd->vxlcmd_port_max; 2082 2083 if (max < min) 2084 return (EINVAL); 2085 2086 VXLAN_WLOCK(sc); 2087 if (vxlan_can_change_config(sc)) { 2088 sc->vxl_min_port = min; 2089 sc->vxl_max_port = max; 2090 error = 0; 2091 } else 2092 error = EBUSY; 2093 VXLAN_WUNLOCK(sc); 2094 2095 return (error); 2096 } 2097 2098 static int 2099 vxlan_ctrl_set_ftable_timeout(struct vxlan_softc *sc, void *arg) 2100 { 2101 struct ifvxlancmd *cmd; 2102 int error; 2103 2104 cmd = arg; 2105 2106 VXLAN_WLOCK(sc); 2107 if (vxlan_check_ftable_timeout(cmd->vxlcmd_ftable_timeout) == 0) { 2108 sc->vxl_ftable_timeout = cmd->vxlcmd_ftable_timeout; 2109 error = 0; 2110 } else 2111 error = EINVAL; 2112 VXLAN_WUNLOCK(sc); 2113 2114 return (error); 2115 } 2116 2117 static int 2118 vxlan_ctrl_set_ftable_max(struct vxlan_softc *sc, void *arg) 2119 { 2120 struct ifvxlancmd *cmd; 2121 int error; 2122 2123 cmd = arg; 2124 2125 VXLAN_WLOCK(sc); 2126 if (vxlan_check_ftable_max(cmd->vxlcmd_ftable_max) == 0) { 2127 sc->vxl_ftable_max = cmd->vxlcmd_ftable_max; 2128 error = 0; 2129 } else 2130 error = EINVAL; 2131 VXLAN_WUNLOCK(sc); 2132 2133 return (error); 2134 } 2135 2136 static int 2137 vxlan_ctrl_set_multicast_if(struct vxlan_softc * sc, void *arg) 2138 { 2139 struct ifvxlancmd *cmd; 2140 int error; 2141 2142 cmd = arg; 2143 2144 VXLAN_WLOCK(sc); 2145 if (vxlan_can_change_config(sc)) { 2146 strlcpy(sc->vxl_mc_ifname, cmd->vxlcmd_ifname, IFNAMSIZ); 2147 vxlan_set_hwcaps(sc); 2148 error = 0; 2149 } else 2150 error = EBUSY; 2151 VXLAN_WUNLOCK(sc); 2152 2153 return (error); 2154 } 2155 2156 static int 2157 vxlan_ctrl_set_ttl(struct vxlan_softc *sc, void *arg) 2158 { 2159 struct ifvxlancmd *cmd; 2160 int error; 2161 2162 cmd = arg; 2163 2164 VXLAN_WLOCK(sc); 2165 if (vxlan_check_ttl(cmd->vxlcmd_ttl) == 0) { 2166 sc->vxl_ttl = cmd->vxlcmd_ttl; 2167 if (sc->vxl_im4o != NULL) 2168 sc->vxl_im4o->imo_multicast_ttl = sc->vxl_ttl; 2169 if (sc->vxl_im6o != NULL) 2170 sc->vxl_im6o->im6o_multicast_hlim = sc->vxl_ttl; 2171 error = 0; 2172 } else 2173 error = EINVAL; 2174 VXLAN_WUNLOCK(sc); 2175 2176 return (error); 2177 } 2178 2179 static int 2180 vxlan_ctrl_set_learn(struct vxlan_softc *sc, void *arg) 2181 { 2182 struct ifvxlancmd *cmd; 2183 2184 cmd = arg; 2185 2186 VXLAN_WLOCK(sc); 2187 if (cmd->vxlcmd_flags & VXLAN_CMD_FLAG_LEARN) 2188 sc->vxl_flags |= VXLAN_FLAG_LEARN; 2189 else 2190 sc->vxl_flags &= ~VXLAN_FLAG_LEARN; 2191 VXLAN_WUNLOCK(sc); 2192 2193 return (0); 2194 } 2195 2196 static int 2197 vxlan_ctrl_ftable_entry_add(struct vxlan_softc *sc, void *arg) 2198 { 2199 union vxlan_sockaddr vxlsa; 2200 struct ifvxlancmd *cmd; 2201 struct vxlan_ftable_entry *fe; 2202 int error; 2203 2204 cmd = arg; 2205 vxlsa = cmd->vxlcmd_sa; 2206 2207 if (!VXLAN_SOCKADDR_IS_IPV46(&vxlsa)) 2208 return (EINVAL); 2209 if (vxlan_sockaddr_in_any(&vxlsa) != 0) 2210 return (EINVAL); 2211 if (vxlan_sockaddr_in_multicast(&vxlsa) != 0) 2212 return (EINVAL); 2213 /* BMV: We could support both IPv4 and IPv6 later. */ 2214 if (vxlsa.sa.sa_family != sc->vxl_dst_addr.sa.sa_family) 2215 return (EAFNOSUPPORT); 2216 2217 if (VXLAN_SOCKADDR_IS_IPV6(&vxlsa)) { 2218 error = vxlan_sockaddr_in6_embedscope(&vxlsa); 2219 if (error) 2220 return (error); 2221 } 2222 2223 fe = vxlan_ftable_entry_alloc(); 2224 if (fe == NULL) 2225 return (ENOMEM); 2226 2227 if (vxlsa.in4.sin_port == 0) 2228 vxlsa.in4.sin_port = sc->vxl_dst_addr.in4.sin_port; 2229 2230 vxlan_ftable_entry_init(sc, fe, cmd->vxlcmd_mac, &vxlsa.sa, 2231 VXLAN_FE_FLAG_STATIC); 2232 2233 VXLAN_WLOCK(sc); 2234 error = vxlan_ftable_entry_insert(sc, fe); 2235 VXLAN_WUNLOCK(sc); 2236 2237 if (error) 2238 vxlan_ftable_entry_free(fe); 2239 2240 return (error); 2241 } 2242 2243 static int 2244 vxlan_ctrl_ftable_entry_rem(struct vxlan_softc *sc, void *arg) 2245 { 2246 struct ifvxlancmd *cmd; 2247 struct vxlan_ftable_entry *fe; 2248 int error; 2249 2250 cmd = arg; 2251 2252 VXLAN_WLOCK(sc); 2253 fe = vxlan_ftable_entry_lookup(sc, cmd->vxlcmd_mac); 2254 if (fe != NULL) { 2255 vxlan_ftable_entry_destroy(sc, fe); 2256 error = 0; 2257 } else 2258 error = ENOENT; 2259 VXLAN_WUNLOCK(sc); 2260 2261 return (error); 2262 } 2263 2264 static int 2265 vxlan_ctrl_flush(struct vxlan_softc *sc, void *arg) 2266 { 2267 struct ifvxlancmd *cmd; 2268 int all; 2269 2270 cmd = arg; 2271 all = cmd->vxlcmd_flags & VXLAN_CMD_FLAG_FLUSH_ALL; 2272 2273 VXLAN_WLOCK(sc); 2274 vxlan_ftable_flush(sc, all); 2275 VXLAN_WUNLOCK(sc); 2276 2277 return (0); 2278 } 2279 2280 static int 2281 vxlan_ioctl_drvspec(struct vxlan_softc *sc, struct ifdrv *ifd, int get) 2282 { 2283 const struct vxlan_control *vc; 2284 union { 2285 struct ifvxlancfg cfg; 2286 struct ifvxlancmd cmd; 2287 } args; 2288 int out, error; 2289 2290 if (ifd->ifd_cmd >= vxlan_control_table_size) 2291 return (EINVAL); 2292 2293 bzero(&args, sizeof(args)); 2294 vc = &vxlan_control_table[ifd->ifd_cmd]; 2295 out = (vc->vxlc_flags & VXLAN_CTRL_FLAG_COPYOUT) != 0; 2296 2297 if ((get != 0 && out == 0) || (get == 0 && out != 0)) 2298 return (EINVAL); 2299 2300 if (vc->vxlc_flags & VXLAN_CTRL_FLAG_SUSER) { 2301 error = priv_check(curthread, PRIV_NET_VXLAN); 2302 if (error) 2303 return (error); 2304 } 2305 2306 if (ifd->ifd_len != vc->vxlc_argsize || 2307 ifd->ifd_len > sizeof(args)) 2308 return (EINVAL); 2309 2310 if (vc->vxlc_flags & VXLAN_CTRL_FLAG_COPYIN) { 2311 error = copyin(ifd->ifd_data, &args, ifd->ifd_len); 2312 if (error) 2313 return (error); 2314 } 2315 2316 error = vc->vxlc_func(sc, &args); 2317 if (error) 2318 return (error); 2319 2320 if (vc->vxlc_flags & VXLAN_CTRL_FLAG_COPYOUT) { 2321 error = copyout(&args, ifd->ifd_data, ifd->ifd_len); 2322 if (error) 2323 return (error); 2324 } 2325 2326 return (0); 2327 } 2328 2329 static int 2330 vxlan_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 2331 { 2332 struct vxlan_softc *sc; 2333 struct ifreq *ifr; 2334 struct ifdrv *ifd; 2335 int error; 2336 2337 sc = ifp->if_softc; 2338 ifr = (struct ifreq *) data; 2339 ifd = (struct ifdrv *) data; 2340 2341 error = 0; 2342 2343 switch (cmd) { 2344 case SIOCADDMULTI: 2345 case SIOCDELMULTI: 2346 break; 2347 2348 case SIOCGDRVSPEC: 2349 case SIOCSDRVSPEC: 2350 error = vxlan_ioctl_drvspec(sc, ifd, cmd == SIOCGDRVSPEC); 2351 break; 2352 2353 case SIOCSIFFLAGS: 2354 error = vxlan_ioctl_ifflags(sc); 2355 break; 2356 2357 case SIOCSIFMEDIA: 2358 case SIOCGIFMEDIA: 2359 error = ifmedia_ioctl(ifp, ifr, &sc->vxl_media, cmd); 2360 break; 2361 2362 case SIOCSIFMTU: 2363 if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > VXLAN_MAX_MTU) { 2364 error = EINVAL; 2365 } else { 2366 VXLAN_WLOCK(sc); 2367 ifp->if_mtu = ifr->ifr_mtu; 2368 sc->vxl_flags |= VXLAN_FLAG_USER_MTU; 2369 VXLAN_WUNLOCK(sc); 2370 } 2371 break; 2372 2373 case SIOCSIFCAP: 2374 VXLAN_WLOCK(sc); 2375 error = vxlan_set_reqcap(sc, ifp, ifr->ifr_reqcap); 2376 if (error == 0) 2377 vxlan_set_hwcaps(sc); 2378 VXLAN_WUNLOCK(sc); 2379 break; 2380 2381 default: 2382 error = ether_ioctl(ifp, cmd, data); 2383 break; 2384 } 2385 2386 return (error); 2387 } 2388 2389 #if defined(INET) || defined(INET6) 2390 static uint16_t 2391 vxlan_pick_source_port(struct vxlan_softc *sc, struct mbuf *m) 2392 { 2393 int range; 2394 uint32_t hash; 2395 2396 range = sc->vxl_max_port - sc->vxl_min_port + 1; 2397 2398 if (M_HASHTYPE_ISHASH(m)) 2399 hash = m->m_pkthdr.flowid; 2400 else 2401 hash = jenkins_hash(m->m_data, ETHER_HDR_LEN, 2402 sc->vxl_port_hash_key); 2403 2404 return (sc->vxl_min_port + (hash % range)); 2405 } 2406 2407 static void 2408 vxlan_encap_header(struct vxlan_softc *sc, struct mbuf *m, int ipoff, 2409 uint16_t srcport, uint16_t dstport) 2410 { 2411 struct vxlanudphdr *hdr; 2412 struct udphdr *udph; 2413 struct vxlan_header *vxh; 2414 int len; 2415 2416 len = m->m_pkthdr.len - ipoff; 2417 MPASS(len >= sizeof(struct vxlanudphdr)); 2418 hdr = mtodo(m, ipoff); 2419 2420 udph = &hdr->vxlh_udp; 2421 udph->uh_sport = srcport; 2422 udph->uh_dport = dstport; 2423 udph->uh_ulen = htons(len); 2424 udph->uh_sum = 0; 2425 2426 vxh = &hdr->vxlh_hdr; 2427 vxh->vxlh_flags = htonl(VXLAN_HDR_FLAGS_VALID_VNI); 2428 vxh->vxlh_vni = htonl(sc->vxl_vni << VXLAN_HDR_VNI_SHIFT); 2429 } 2430 #endif 2431 2432 #if defined(INET6) || defined(INET) 2433 /* 2434 * Return the CSUM_INNER_* equivalent of CSUM_* caps. 2435 */ 2436 static uint32_t 2437 csum_flags_to_inner_flags(uint32_t csum_flags_in, const uint32_t encap) 2438 { 2439 uint32_t csum_flags = encap; 2440 const uint32_t v4 = CSUM_IP | CSUM_IP_UDP | CSUM_IP_TCP; 2441 2442 /* 2443 * csum_flags can request either v4 or v6 offload but not both. 2444 * tcp_output always sets CSUM_TSO (both CSUM_IP_TSO and CSUM_IP6_TSO) 2445 * so those bits are no good to detect the IP version. Other bits are 2446 * always set with CSUM_TSO and we use those to figure out the IP 2447 * version. 2448 */ 2449 if (csum_flags_in & v4) { 2450 if (csum_flags_in & CSUM_IP) 2451 csum_flags |= CSUM_INNER_IP; 2452 if (csum_flags_in & CSUM_IP_UDP) 2453 csum_flags |= CSUM_INNER_IP_UDP; 2454 if (csum_flags_in & CSUM_IP_TCP) 2455 csum_flags |= CSUM_INNER_IP_TCP; 2456 if (csum_flags_in & CSUM_IP_TSO) 2457 csum_flags |= CSUM_INNER_IP_TSO; 2458 } else { 2459 #ifdef INVARIANTS 2460 const uint32_t v6 = CSUM_IP6_UDP | CSUM_IP6_TCP; 2461 2462 MPASS((csum_flags_in & v6) != 0); 2463 #endif 2464 if (csum_flags_in & CSUM_IP6_UDP) 2465 csum_flags |= CSUM_INNER_IP6_UDP; 2466 if (csum_flags_in & CSUM_IP6_TCP) 2467 csum_flags |= CSUM_INNER_IP6_TCP; 2468 if (csum_flags_in & CSUM_IP6_TSO) 2469 csum_flags |= CSUM_INNER_IP6_TSO; 2470 } 2471 2472 return (csum_flags); 2473 } 2474 #endif 2475 2476 static int 2477 vxlan_encap4(struct vxlan_softc *sc, const union vxlan_sockaddr *fvxlsa, 2478 struct mbuf *m) 2479 { 2480 #ifdef INET 2481 struct ifnet *ifp; 2482 struct ip *ip; 2483 struct in_addr srcaddr, dstaddr; 2484 uint16_t srcport, dstport; 2485 int len, mcast, error; 2486 struct route route, *ro; 2487 struct sockaddr_in *sin; 2488 uint32_t csum_flags; 2489 2490 NET_EPOCH_ASSERT(); 2491 2492 ifp = sc->vxl_ifp; 2493 srcaddr = sc->vxl_src_addr.in4.sin_addr; 2494 srcport = vxlan_pick_source_port(sc, m); 2495 dstaddr = fvxlsa->in4.sin_addr; 2496 dstport = fvxlsa->in4.sin_port; 2497 2498 M_PREPEND(m, sizeof(struct ip) + sizeof(struct vxlanudphdr), 2499 M_NOWAIT); 2500 if (m == NULL) { 2501 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 2502 return (ENOBUFS); 2503 } 2504 2505 len = m->m_pkthdr.len; 2506 2507 ip = mtod(m, struct ip *); 2508 ip->ip_tos = 0; 2509 ip->ip_len = htons(len); 2510 ip->ip_off = 0; 2511 ip->ip_ttl = sc->vxl_ttl; 2512 ip->ip_p = IPPROTO_UDP; 2513 ip->ip_sum = 0; 2514 ip->ip_src = srcaddr; 2515 ip->ip_dst = dstaddr; 2516 2517 vxlan_encap_header(sc, m, sizeof(struct ip), srcport, dstport); 2518 2519 mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1 : 0; 2520 m->m_flags &= ~(M_MCAST | M_BCAST); 2521 2522 m->m_pkthdr.csum_flags &= CSUM_FLAGS_TX; 2523 if (m->m_pkthdr.csum_flags != 0) { 2524 /* 2525 * HW checksum (L3 and/or L4) or TSO has been requested. Look 2526 * up the ifnet for the outbound route and verify that the 2527 * outbound ifnet can perform the requested operation on the 2528 * inner frame. 2529 */ 2530 bzero(&route, sizeof(route)); 2531 ro = &route; 2532 sin = (struct sockaddr_in *)&ro->ro_dst; 2533 sin->sin_family = AF_INET; 2534 sin->sin_len = sizeof(*sin); 2535 sin->sin_addr = ip->ip_dst; 2536 ro->ro_nh = fib4_lookup(RT_DEFAULT_FIB, ip->ip_dst, 0, NHR_NONE, 2537 0); 2538 if (ro->ro_nh == NULL) { 2539 m_freem(m); 2540 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 2541 return (EHOSTUNREACH); 2542 } 2543 2544 csum_flags = csum_flags_to_inner_flags(m->m_pkthdr.csum_flags, 2545 CSUM_ENCAP_VXLAN); 2546 if ((csum_flags & ro->ro_nh->nh_ifp->if_hwassist) != 2547 csum_flags) { 2548 if (ppsratecheck(&sc->err_time, &sc->err_pps, 1)) { 2549 const struct ifnet *nh_ifp = ro->ro_nh->nh_ifp; 2550 2551 if_printf(ifp, "interface %s is missing hwcaps " 2552 "0x%08x, csum_flags 0x%08x -> 0x%08x, " 2553 "hwassist 0x%08x\n", nh_ifp->if_xname, 2554 csum_flags & ~(uint32_t)nh_ifp->if_hwassist, 2555 m->m_pkthdr.csum_flags, csum_flags, 2556 (uint32_t)nh_ifp->if_hwassist); 2557 } 2558 m_freem(m); 2559 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 2560 return (ENXIO); 2561 } 2562 m->m_pkthdr.csum_flags = csum_flags; 2563 if (csum_flags & 2564 (CSUM_INNER_IP | CSUM_INNER_IP_UDP | CSUM_INNER_IP6_UDP | 2565 CSUM_INNER_IP_TCP | CSUM_INNER_IP6_TCP)) { 2566 counter_u64_add(sc->vxl_stats.txcsum, 1); 2567 if (csum_flags & CSUM_INNER_TSO) 2568 counter_u64_add(sc->vxl_stats.tso, 1); 2569 } 2570 } else 2571 ro = NULL; 2572 error = ip_output(m, NULL, ro, 0, sc->vxl_im4o, NULL); 2573 if (error == 0) { 2574 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); 2575 if_inc_counter(ifp, IFCOUNTER_OBYTES, len); 2576 if (mcast != 0) 2577 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1); 2578 } else 2579 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 2580 2581 return (error); 2582 #else 2583 m_freem(m); 2584 return (ENOTSUP); 2585 #endif 2586 } 2587 2588 static int 2589 vxlan_encap6(struct vxlan_softc *sc, const union vxlan_sockaddr *fvxlsa, 2590 struct mbuf *m) 2591 { 2592 #ifdef INET6 2593 struct ifnet *ifp; 2594 struct ip6_hdr *ip6; 2595 const struct in6_addr *srcaddr, *dstaddr; 2596 uint16_t srcport, dstport; 2597 int len, mcast, error; 2598 struct route_in6 route, *ro; 2599 struct sockaddr_in6 *sin6; 2600 uint32_t csum_flags; 2601 2602 NET_EPOCH_ASSERT(); 2603 2604 ifp = sc->vxl_ifp; 2605 srcaddr = &sc->vxl_src_addr.in6.sin6_addr; 2606 srcport = vxlan_pick_source_port(sc, m); 2607 dstaddr = &fvxlsa->in6.sin6_addr; 2608 dstport = fvxlsa->in6.sin6_port; 2609 2610 M_PREPEND(m, sizeof(struct ip6_hdr) + sizeof(struct vxlanudphdr), 2611 M_NOWAIT); 2612 if (m == NULL) { 2613 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 2614 return (ENOBUFS); 2615 } 2616 2617 len = m->m_pkthdr.len; 2618 2619 ip6 = mtod(m, struct ip6_hdr *); 2620 ip6->ip6_flow = 0; /* BMV: Keep in forwarding entry? */ 2621 ip6->ip6_vfc = IPV6_VERSION; 2622 ip6->ip6_plen = 0; 2623 ip6->ip6_nxt = IPPROTO_UDP; 2624 ip6->ip6_hlim = sc->vxl_ttl; 2625 ip6->ip6_src = *srcaddr; 2626 ip6->ip6_dst = *dstaddr; 2627 2628 vxlan_encap_header(sc, m, sizeof(struct ip6_hdr), srcport, dstport); 2629 2630 mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1 : 0; 2631 m->m_flags &= ~(M_MCAST | M_BCAST); 2632 2633 ro = NULL; 2634 m->m_pkthdr.csum_flags &= CSUM_FLAGS_TX; 2635 if (m->m_pkthdr.csum_flags != 0) { 2636 /* 2637 * HW checksum (L3 and/or L4) or TSO has been requested. Look 2638 * up the ifnet for the outbound route and verify that the 2639 * outbound ifnet can perform the requested operation on the 2640 * inner frame. 2641 */ 2642 bzero(&route, sizeof(route)); 2643 ro = &route; 2644 sin6 = (struct sockaddr_in6 *)&ro->ro_dst; 2645 sin6->sin6_family = AF_INET6; 2646 sin6->sin6_len = sizeof(*sin6); 2647 sin6->sin6_addr = ip6->ip6_dst; 2648 ro->ro_nh = fib6_lookup(RT_DEFAULT_FIB, &ip6->ip6_dst, 0, 2649 NHR_NONE, 0); 2650 if (ro->ro_nh == NULL) { 2651 m_freem(m); 2652 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 2653 return (EHOSTUNREACH); 2654 } 2655 2656 csum_flags = csum_flags_to_inner_flags(m->m_pkthdr.csum_flags, 2657 CSUM_ENCAP_VXLAN); 2658 if ((csum_flags & ro->ro_nh->nh_ifp->if_hwassist) != 2659 csum_flags) { 2660 if (ppsratecheck(&sc->err_time, &sc->err_pps, 1)) { 2661 const struct ifnet *nh_ifp = ro->ro_nh->nh_ifp; 2662 2663 if_printf(ifp, "interface %s is missing hwcaps " 2664 "0x%08x, csum_flags 0x%08x -> 0x%08x, " 2665 "hwassist 0x%08x\n", nh_ifp->if_xname, 2666 csum_flags & ~(uint32_t)nh_ifp->if_hwassist, 2667 m->m_pkthdr.csum_flags, csum_flags, 2668 (uint32_t)nh_ifp->if_hwassist); 2669 } 2670 m_freem(m); 2671 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 2672 return (ENXIO); 2673 } 2674 m->m_pkthdr.csum_flags = csum_flags; 2675 if (csum_flags & 2676 (CSUM_INNER_IP | CSUM_INNER_IP_UDP | CSUM_INNER_IP6_UDP | 2677 CSUM_INNER_IP_TCP | CSUM_INNER_IP6_TCP)) { 2678 counter_u64_add(sc->vxl_stats.txcsum, 1); 2679 if (csum_flags & CSUM_INNER_TSO) 2680 counter_u64_add(sc->vxl_stats.tso, 1); 2681 } 2682 } else if (ntohs(dstport) != V_zero_checksum_port) { 2683 struct udphdr *hdr = mtodo(m, sizeof(struct ip6_hdr)); 2684 2685 hdr->uh_sum = in6_cksum_pseudo(ip6, 2686 m->m_pkthdr.len - sizeof(struct ip6_hdr), IPPROTO_UDP, 0); 2687 m->m_pkthdr.csum_flags = CSUM_UDP_IPV6; 2688 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum); 2689 } 2690 error = ip6_output(m, NULL, ro, 0, sc->vxl_im6o, NULL, NULL); 2691 if (error == 0) { 2692 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); 2693 if_inc_counter(ifp, IFCOUNTER_OBYTES, len); 2694 if (mcast != 0) 2695 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1); 2696 } else 2697 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 2698 2699 return (error); 2700 #else 2701 m_freem(m); 2702 return (ENOTSUP); 2703 #endif 2704 } 2705 2706 static int 2707 vxlan_transmit(struct ifnet *ifp, struct mbuf *m) 2708 { 2709 struct rm_priotracker tracker; 2710 union vxlan_sockaddr vxlsa; 2711 struct vxlan_softc *sc; 2712 struct vxlan_ftable_entry *fe; 2713 struct ifnet *mcifp; 2714 struct ether_header *eh; 2715 int ipv4, error; 2716 2717 sc = ifp->if_softc; 2718 eh = mtod(m, struct ether_header *); 2719 fe = NULL; 2720 mcifp = NULL; 2721 2722 ETHER_BPF_MTAP(ifp, m); 2723 2724 VXLAN_RLOCK(sc, &tracker); 2725 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { 2726 VXLAN_RUNLOCK(sc, &tracker); 2727 m_freem(m); 2728 return (ENETDOWN); 2729 } 2730 2731 if ((m->m_flags & (M_BCAST | M_MCAST)) == 0) 2732 fe = vxlan_ftable_entry_lookup(sc, eh->ether_dhost); 2733 if (fe == NULL) 2734 fe = &sc->vxl_default_fe; 2735 vxlan_sockaddr_copy(&vxlsa, &fe->vxlfe_raddr.sa); 2736 2737 ipv4 = VXLAN_SOCKADDR_IS_IPV4(&vxlsa) != 0; 2738 if (vxlan_sockaddr_in_multicast(&vxlsa) != 0) 2739 mcifp = vxlan_multicast_if_ref(sc, ipv4); 2740 2741 VXLAN_ACQUIRE(sc); 2742 VXLAN_RUNLOCK(sc, &tracker); 2743 2744 if (ipv4 != 0) 2745 error = vxlan_encap4(sc, &vxlsa, m); 2746 else 2747 error = vxlan_encap6(sc, &vxlsa, m); 2748 2749 vxlan_release(sc); 2750 if (mcifp != NULL) 2751 if_rele(mcifp); 2752 2753 return (error); 2754 } 2755 2756 static void 2757 vxlan_qflush(struct ifnet *ifp __unused) 2758 { 2759 } 2760 2761 static void 2762 vxlan_rcv_udp_packet(struct mbuf *m, int offset, struct inpcb *inpcb, 2763 const struct sockaddr *srcsa, void *xvso) 2764 { 2765 struct vxlan_socket *vso; 2766 struct vxlan_header *vxh, vxlanhdr; 2767 uint32_t vni; 2768 int error __unused; 2769 2770 M_ASSERTPKTHDR(m); 2771 vso = xvso; 2772 offset += sizeof(struct udphdr); 2773 2774 if (m->m_pkthdr.len < offset + sizeof(struct vxlan_header)) 2775 goto out; 2776 2777 if (__predict_false(m->m_len < offset + sizeof(struct vxlan_header))) { 2778 m_copydata(m, offset, sizeof(struct vxlan_header), 2779 (caddr_t) &vxlanhdr); 2780 vxh = &vxlanhdr; 2781 } else 2782 vxh = mtodo(m, offset); 2783 2784 /* 2785 * Drop if there is a reserved bit set in either the flags or VNI 2786 * fields of the header. This goes against the specification, but 2787 * a bit set may indicate an unsupported new feature. This matches 2788 * the behavior of the Linux implementation. 2789 */ 2790 if (vxh->vxlh_flags != htonl(VXLAN_HDR_FLAGS_VALID_VNI) || 2791 vxh->vxlh_vni & ~VXLAN_VNI_MASK) 2792 goto out; 2793 2794 vni = ntohl(vxh->vxlh_vni) >> VXLAN_HDR_VNI_SHIFT; 2795 2796 /* Adjust to the start of the inner Ethernet frame. */ 2797 m_adj_decap(m, offset + sizeof(struct vxlan_header)); 2798 2799 error = vxlan_input(vso, vni, &m, srcsa); 2800 MPASS(error != 0 || m == NULL); 2801 2802 out: 2803 if (m != NULL) 2804 m_freem(m); 2805 } 2806 2807 static int 2808 vxlan_input(struct vxlan_socket *vso, uint32_t vni, struct mbuf **m0, 2809 const struct sockaddr *sa) 2810 { 2811 struct vxlan_softc *sc; 2812 struct ifnet *ifp; 2813 struct mbuf *m; 2814 struct ether_header *eh; 2815 int error; 2816 2817 sc = vxlan_socket_lookup_softc(vso, vni); 2818 if (sc == NULL) 2819 return (ENOENT); 2820 2821 ifp = sc->vxl_ifp; 2822 m = *m0; 2823 eh = mtod(m, struct ether_header *); 2824 2825 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { 2826 error = ENETDOWN; 2827 goto out; 2828 } else if (ifp == m->m_pkthdr.rcvif) { 2829 /* XXX Does not catch more complex loops. */ 2830 error = EDEADLK; 2831 goto out; 2832 } 2833 2834 if (sc->vxl_flags & VXLAN_FLAG_LEARN) 2835 vxlan_ftable_learn(sc, sa, eh->ether_shost); 2836 2837 m_clrprotoflags(m); 2838 m->m_pkthdr.rcvif = ifp; 2839 M_SETFIB(m, ifp->if_fib); 2840 if (((ifp->if_capenable & IFCAP_RXCSUM && 2841 m->m_pkthdr.csum_flags & CSUM_INNER_L3_CALC) || 2842 (ifp->if_capenable & IFCAP_RXCSUM_IPV6 && 2843 !(m->m_pkthdr.csum_flags & CSUM_INNER_L3_CALC)))) { 2844 uint32_t csum_flags = 0; 2845 2846 if (m->m_pkthdr.csum_flags & CSUM_INNER_L3_CALC) 2847 csum_flags |= CSUM_L3_CALC; 2848 if (m->m_pkthdr.csum_flags & CSUM_INNER_L3_VALID) 2849 csum_flags |= CSUM_L3_VALID; 2850 if (m->m_pkthdr.csum_flags & CSUM_INNER_L4_CALC) 2851 csum_flags |= CSUM_L4_CALC; 2852 if (m->m_pkthdr.csum_flags & CSUM_INNER_L4_VALID) 2853 csum_flags |= CSUM_L4_VALID; 2854 m->m_pkthdr.csum_flags = csum_flags; 2855 counter_u64_add(sc->vxl_stats.rxcsum, 1); 2856 } else { 2857 /* clear everything */ 2858 m->m_pkthdr.csum_flags = 0; 2859 m->m_pkthdr.csum_data = 0; 2860 } 2861 2862 error = netisr_dispatch(NETISR_ETHER, m); 2863 *m0 = NULL; 2864 2865 out: 2866 vxlan_release(sc); 2867 return (error); 2868 } 2869 2870 static int 2871 vxlan_stats_alloc(struct vxlan_softc *sc) 2872 { 2873 struct vxlan_statistics *stats = &sc->vxl_stats; 2874 2875 stats->txcsum = counter_u64_alloc(M_WAITOK); 2876 if (stats->txcsum == NULL) 2877 goto failed; 2878 2879 stats->tso = counter_u64_alloc(M_WAITOK); 2880 if (stats->tso == NULL) 2881 goto failed; 2882 2883 stats->rxcsum = counter_u64_alloc(M_WAITOK); 2884 if (stats->rxcsum == NULL) 2885 goto failed; 2886 2887 return (0); 2888 failed: 2889 vxlan_stats_free(sc); 2890 return (ENOMEM); 2891 } 2892 2893 static void 2894 vxlan_stats_free(struct vxlan_softc *sc) 2895 { 2896 struct vxlan_statistics *stats = &sc->vxl_stats; 2897 2898 if (stats->txcsum != NULL) { 2899 counter_u64_free(stats->txcsum); 2900 stats->txcsum = NULL; 2901 } 2902 if (stats->tso != NULL) { 2903 counter_u64_free(stats->tso); 2904 stats->tso = NULL; 2905 } 2906 if (stats->rxcsum != NULL) { 2907 counter_u64_free(stats->rxcsum); 2908 stats->rxcsum = NULL; 2909 } 2910 } 2911 2912 static void 2913 vxlan_set_default_config(struct vxlan_softc *sc) 2914 { 2915 2916 sc->vxl_flags |= VXLAN_FLAG_LEARN; 2917 2918 sc->vxl_vni = VXLAN_VNI_MAX; 2919 sc->vxl_ttl = IPDEFTTL; 2920 2921 if (!vxlan_tunable_int(sc, "legacy_port", vxlan_legacy_port)) { 2922 sc->vxl_src_addr.in4.sin_port = htons(VXLAN_PORT); 2923 sc->vxl_dst_addr.in4.sin_port = htons(VXLAN_PORT); 2924 } else { 2925 sc->vxl_src_addr.in4.sin_port = htons(VXLAN_LEGACY_PORT); 2926 sc->vxl_dst_addr.in4.sin_port = htons(VXLAN_LEGACY_PORT); 2927 } 2928 2929 sc->vxl_min_port = V_ipport_firstauto; 2930 sc->vxl_max_port = V_ipport_lastauto; 2931 2932 sc->vxl_ftable_max = VXLAN_FTABLE_MAX; 2933 sc->vxl_ftable_timeout = VXLAN_FTABLE_TIMEOUT; 2934 } 2935 2936 static int 2937 vxlan_set_user_config(struct vxlan_softc *sc, struct ifvxlanparam *vxlp) 2938 { 2939 2940 #ifndef INET 2941 if (vxlp->vxlp_with & (VXLAN_PARAM_WITH_LOCAL_ADDR4 | 2942 VXLAN_PARAM_WITH_REMOTE_ADDR4)) 2943 return (EAFNOSUPPORT); 2944 #endif 2945 2946 #ifndef INET6 2947 if (vxlp->vxlp_with & (VXLAN_PARAM_WITH_LOCAL_ADDR6 | 2948 VXLAN_PARAM_WITH_REMOTE_ADDR6)) 2949 return (EAFNOSUPPORT); 2950 #else 2951 if (vxlp->vxlp_with & VXLAN_PARAM_WITH_LOCAL_ADDR6) { 2952 int error = vxlan_sockaddr_in6_embedscope(&vxlp->vxlp_local_sa); 2953 if (error) 2954 return (error); 2955 } 2956 if (vxlp->vxlp_with & VXLAN_PARAM_WITH_REMOTE_ADDR6) { 2957 int error = vxlan_sockaddr_in6_embedscope( 2958 &vxlp->vxlp_remote_sa); 2959 if (error) 2960 return (error); 2961 } 2962 #endif 2963 2964 if (vxlp->vxlp_with & VXLAN_PARAM_WITH_VNI) { 2965 if (vxlan_check_vni(vxlp->vxlp_vni) == 0) 2966 sc->vxl_vni = vxlp->vxlp_vni; 2967 } 2968 2969 if (vxlp->vxlp_with & VXLAN_PARAM_WITH_LOCAL_ADDR4) { 2970 sc->vxl_src_addr.in4.sin_len = sizeof(struct sockaddr_in); 2971 sc->vxl_src_addr.in4.sin_family = AF_INET; 2972 sc->vxl_src_addr.in4.sin_addr = 2973 vxlp->vxlp_local_sa.in4.sin_addr; 2974 } else if (vxlp->vxlp_with & VXLAN_PARAM_WITH_LOCAL_ADDR6) { 2975 sc->vxl_src_addr.in6.sin6_len = sizeof(struct sockaddr_in6); 2976 sc->vxl_src_addr.in6.sin6_family = AF_INET6; 2977 sc->vxl_src_addr.in6.sin6_addr = 2978 vxlp->vxlp_local_sa.in6.sin6_addr; 2979 } 2980 2981 if (vxlp->vxlp_with & VXLAN_PARAM_WITH_REMOTE_ADDR4) { 2982 sc->vxl_dst_addr.in4.sin_len = sizeof(struct sockaddr_in); 2983 sc->vxl_dst_addr.in4.sin_family = AF_INET; 2984 sc->vxl_dst_addr.in4.sin_addr = 2985 vxlp->vxlp_remote_sa.in4.sin_addr; 2986 } else if (vxlp->vxlp_with & VXLAN_PARAM_WITH_REMOTE_ADDR6) { 2987 sc->vxl_dst_addr.in6.sin6_len = sizeof(struct sockaddr_in6); 2988 sc->vxl_dst_addr.in6.sin6_family = AF_INET6; 2989 sc->vxl_dst_addr.in6.sin6_addr = 2990 vxlp->vxlp_remote_sa.in6.sin6_addr; 2991 } 2992 2993 if (vxlp->vxlp_with & VXLAN_PARAM_WITH_LOCAL_PORT) 2994 sc->vxl_src_addr.in4.sin_port = htons(vxlp->vxlp_local_port); 2995 if (vxlp->vxlp_with & VXLAN_PARAM_WITH_REMOTE_PORT) 2996 sc->vxl_dst_addr.in4.sin_port = htons(vxlp->vxlp_remote_port); 2997 2998 if (vxlp->vxlp_with & VXLAN_PARAM_WITH_PORT_RANGE) { 2999 if (vxlp->vxlp_min_port <= vxlp->vxlp_max_port) { 3000 sc->vxl_min_port = vxlp->vxlp_min_port; 3001 sc->vxl_max_port = vxlp->vxlp_max_port; 3002 } 3003 } 3004 3005 if (vxlp->vxlp_with & VXLAN_PARAM_WITH_MULTICAST_IF) 3006 strlcpy(sc->vxl_mc_ifname, vxlp->vxlp_mc_ifname, IFNAMSIZ); 3007 3008 if (vxlp->vxlp_with & VXLAN_PARAM_WITH_FTABLE_TIMEOUT) { 3009 if (vxlan_check_ftable_timeout(vxlp->vxlp_ftable_timeout) == 0) 3010 sc->vxl_ftable_timeout = vxlp->vxlp_ftable_timeout; 3011 } 3012 3013 if (vxlp->vxlp_with & VXLAN_PARAM_WITH_FTABLE_MAX) { 3014 if (vxlan_check_ftable_max(vxlp->vxlp_ftable_max) == 0) 3015 sc->vxl_ftable_max = vxlp->vxlp_ftable_max; 3016 } 3017 3018 if (vxlp->vxlp_with & VXLAN_PARAM_WITH_TTL) { 3019 if (vxlan_check_ttl(vxlp->vxlp_ttl) == 0) 3020 sc->vxl_ttl = vxlp->vxlp_ttl; 3021 } 3022 3023 if (vxlp->vxlp_with & VXLAN_PARAM_WITH_LEARN) { 3024 if (vxlp->vxlp_learn == 0) 3025 sc->vxl_flags &= ~VXLAN_FLAG_LEARN; 3026 } 3027 3028 return (0); 3029 } 3030 3031 static int 3032 vxlan_set_reqcap(struct vxlan_softc *sc, struct ifnet *ifp, int reqcap) 3033 { 3034 int mask = reqcap ^ ifp->if_capenable; 3035 3036 /* Disable TSO if tx checksums are disabled. */ 3037 if (mask & IFCAP_TXCSUM && !(reqcap & IFCAP_TXCSUM) && 3038 reqcap & IFCAP_TSO4) { 3039 reqcap &= ~IFCAP_TSO4; 3040 if_printf(ifp, "tso4 disabled due to -txcsum.\n"); 3041 } 3042 if (mask & IFCAP_TXCSUM_IPV6 && !(reqcap & IFCAP_TXCSUM_IPV6) && 3043 reqcap & IFCAP_TSO6) { 3044 reqcap &= ~IFCAP_TSO6; 3045 if_printf(ifp, "tso6 disabled due to -txcsum6.\n"); 3046 } 3047 3048 /* Do not enable TSO if tx checksums are disabled. */ 3049 if (mask & IFCAP_TSO4 && reqcap & IFCAP_TSO4 && 3050 !(reqcap & IFCAP_TXCSUM)) { 3051 if_printf(ifp, "enable txcsum first.\n"); 3052 return (EAGAIN); 3053 } 3054 if (mask & IFCAP_TSO6 && reqcap & IFCAP_TSO6 && 3055 !(reqcap & IFCAP_TXCSUM_IPV6)) { 3056 if_printf(ifp, "enable txcsum6 first.\n"); 3057 return (EAGAIN); 3058 } 3059 3060 sc->vxl_reqcap = reqcap; 3061 return (0); 3062 } 3063 3064 /* 3065 * A VXLAN interface inherits the capabilities of the vxlandev or the interface 3066 * hosting the vxlanlocal address. 3067 */ 3068 static void 3069 vxlan_set_hwcaps(struct vxlan_softc *sc) 3070 { 3071 struct epoch_tracker et; 3072 struct ifnet *p; 3073 struct ifaddr *ifa; 3074 u_long hwa; 3075 int cap, ena; 3076 bool rel; 3077 struct ifnet *ifp = sc->vxl_ifp; 3078 3079 /* reset caps */ 3080 ifp->if_capabilities &= VXLAN_BASIC_IFCAPS; 3081 ifp->if_capenable &= VXLAN_BASIC_IFCAPS; 3082 ifp->if_hwassist = 0; 3083 3084 NET_EPOCH_ENTER(et); 3085 CURVNET_SET(ifp->if_vnet); 3086 3087 rel = false; 3088 p = NULL; 3089 if (sc->vxl_mc_ifname[0] != '\0') { 3090 rel = true; 3091 p = ifunit_ref(sc->vxl_mc_ifname); 3092 } else if (vxlan_sockaddr_in_any(&sc->vxl_src_addr) == 0) { 3093 if (sc->vxl_src_addr.sa.sa_family == AF_INET) { 3094 struct sockaddr_in in4 = sc->vxl_src_addr.in4; 3095 3096 in4.sin_port = 0; 3097 ifa = ifa_ifwithaddr((struct sockaddr *)&in4); 3098 if (ifa != NULL) 3099 p = ifa->ifa_ifp; 3100 } else if (sc->vxl_src_addr.sa.sa_family == AF_INET6) { 3101 struct sockaddr_in6 in6 = sc->vxl_src_addr.in6; 3102 3103 in6.sin6_port = 0; 3104 ifa = ifa_ifwithaddr((struct sockaddr *)&in6); 3105 if (ifa != NULL) 3106 p = ifa->ifa_ifp; 3107 } 3108 } 3109 if (p == NULL) 3110 goto done; 3111 3112 cap = ena = hwa = 0; 3113 3114 /* checksum offload */ 3115 if (p->if_capabilities & IFCAP_VXLAN_HWCSUM) 3116 cap |= p->if_capabilities & (IFCAP_HWCSUM | IFCAP_HWCSUM_IPV6); 3117 if (p->if_capenable & IFCAP_VXLAN_HWCSUM) { 3118 ena |= sc->vxl_reqcap & p->if_capenable & 3119 (IFCAP_HWCSUM | IFCAP_HWCSUM_IPV6); 3120 if (ena & IFCAP_TXCSUM) { 3121 if (p->if_hwassist & CSUM_INNER_IP) 3122 hwa |= CSUM_IP; 3123 if (p->if_hwassist & CSUM_INNER_IP_UDP) 3124 hwa |= CSUM_IP_UDP; 3125 if (p->if_hwassist & CSUM_INNER_IP_TCP) 3126 hwa |= CSUM_IP_TCP; 3127 } 3128 if (ena & IFCAP_TXCSUM_IPV6) { 3129 if (p->if_hwassist & CSUM_INNER_IP6_UDP) 3130 hwa |= CSUM_IP6_UDP; 3131 if (p->if_hwassist & CSUM_INNER_IP6_TCP) 3132 hwa |= CSUM_IP6_TCP; 3133 } 3134 } 3135 3136 /* hardware TSO */ 3137 if (p->if_capabilities & IFCAP_VXLAN_HWTSO) { 3138 cap |= p->if_capabilities & IFCAP_TSO; 3139 if (p->if_hw_tsomax > IP_MAXPACKET - ifp->if_hdrlen) 3140 ifp->if_hw_tsomax = IP_MAXPACKET - ifp->if_hdrlen; 3141 else 3142 ifp->if_hw_tsomax = p->if_hw_tsomax; 3143 /* XXX: tsomaxsegcount decrement is cxgbe specific */ 3144 ifp->if_hw_tsomaxsegcount = p->if_hw_tsomaxsegcount - 1; 3145 ifp->if_hw_tsomaxsegsize = p->if_hw_tsomaxsegsize; 3146 } 3147 if (p->if_capenable & IFCAP_VXLAN_HWTSO) { 3148 ena |= sc->vxl_reqcap & p->if_capenable & IFCAP_TSO; 3149 if (ena & IFCAP_TSO) { 3150 if (p->if_hwassist & CSUM_INNER_IP_TSO) 3151 hwa |= CSUM_IP_TSO; 3152 if (p->if_hwassist & CSUM_INNER_IP6_TSO) 3153 hwa |= CSUM_IP6_TSO; 3154 } 3155 } 3156 3157 ifp->if_capabilities |= cap; 3158 ifp->if_capenable |= ena; 3159 ifp->if_hwassist |= hwa; 3160 if (rel) 3161 if_rele(p); 3162 done: 3163 CURVNET_RESTORE(); 3164 NET_EPOCH_EXIT(et); 3165 } 3166 3167 static int 3168 vxlan_clone_create(struct if_clone *ifc, int unit, caddr_t params) 3169 { 3170 struct vxlan_softc *sc; 3171 struct ifnet *ifp; 3172 struct ifvxlanparam vxlp; 3173 int error; 3174 3175 sc = malloc(sizeof(struct vxlan_softc), M_VXLAN, M_WAITOK | M_ZERO); 3176 sc->vxl_unit = unit; 3177 vxlan_set_default_config(sc); 3178 error = vxlan_stats_alloc(sc); 3179 if (error != 0) 3180 goto fail; 3181 3182 if (params != 0) { 3183 error = copyin(params, &vxlp, sizeof(vxlp)); 3184 if (error) 3185 goto fail; 3186 3187 error = vxlan_set_user_config(sc, &vxlp); 3188 if (error) 3189 goto fail; 3190 } 3191 3192 ifp = if_alloc(IFT_ETHER); 3193 if (ifp == NULL) { 3194 error = ENOSPC; 3195 goto fail; 3196 } 3197 3198 sc->vxl_ifp = ifp; 3199 rm_init(&sc->vxl_lock, "vxlanrm"); 3200 callout_init_rw(&sc->vxl_callout, &sc->vxl_lock, 0); 3201 sc->vxl_port_hash_key = arc4random(); 3202 vxlan_ftable_init(sc); 3203 3204 vxlan_sysctl_setup(sc); 3205 3206 ifp->if_softc = sc; 3207 if_initname(ifp, vxlan_name, unit); 3208 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 3209 ifp->if_init = vxlan_init; 3210 ifp->if_ioctl = vxlan_ioctl; 3211 ifp->if_transmit = vxlan_transmit; 3212 ifp->if_qflush = vxlan_qflush; 3213 ifp->if_capabilities = VXLAN_BASIC_IFCAPS; 3214 ifp->if_capenable = VXLAN_BASIC_IFCAPS; 3215 sc->vxl_reqcap = -1; 3216 vxlan_set_hwcaps(sc); 3217 3218 ifmedia_init(&sc->vxl_media, 0, vxlan_media_change, vxlan_media_status); 3219 ifmedia_add(&sc->vxl_media, IFM_ETHER | IFM_AUTO, 0, NULL); 3220 ifmedia_set(&sc->vxl_media, IFM_ETHER | IFM_AUTO); 3221 3222 ether_gen_addr(ifp, &sc->vxl_hwaddr); 3223 ether_ifattach(ifp, sc->vxl_hwaddr.octet); 3224 3225 ifp->if_baudrate = 0; 3226 3227 VXLAN_WLOCK(sc); 3228 vxlan_setup_interface_hdrlen(sc); 3229 VXLAN_WUNLOCK(sc); 3230 3231 return (0); 3232 3233 fail: 3234 free(sc, M_VXLAN); 3235 return (error); 3236 } 3237 3238 static void 3239 vxlan_clone_destroy(struct ifnet *ifp) 3240 { 3241 struct vxlan_softc *sc; 3242 3243 sc = ifp->if_softc; 3244 3245 vxlan_teardown(sc); 3246 3247 vxlan_ftable_flush(sc, 1); 3248 3249 ether_ifdetach(ifp); 3250 if_free(ifp); 3251 ifmedia_removeall(&sc->vxl_media); 3252 3253 vxlan_ftable_fini(sc); 3254 3255 vxlan_sysctl_destroy(sc); 3256 rm_destroy(&sc->vxl_lock); 3257 vxlan_stats_free(sc); 3258 free(sc, M_VXLAN); 3259 } 3260 3261 /* BMV: Taken from if_bridge. */ 3262 static uint32_t 3263 vxlan_mac_hash(struct vxlan_softc *sc, const uint8_t *addr) 3264 { 3265 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = sc->vxl_ftable_hash_key; 3266 3267 b += addr[5] << 8; 3268 b += addr[4]; 3269 a += addr[3] << 24; 3270 a += addr[2] << 16; 3271 a += addr[1] << 8; 3272 a += addr[0]; 3273 3274 /* 3275 * The following hash function is adapted from "Hash Functions" by Bob Jenkins 3276 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997). 3277 */ 3278 #define mix(a, b, c) \ 3279 do { \ 3280 a -= b; a -= c; a ^= (c >> 13); \ 3281 b -= c; b -= a; b ^= (a << 8); \ 3282 c -= a; c -= b; c ^= (b >> 13); \ 3283 a -= b; a -= c; a ^= (c >> 12); \ 3284 b -= c; b -= a; b ^= (a << 16); \ 3285 c -= a; c -= b; c ^= (b >> 5); \ 3286 a -= b; a -= c; a ^= (c >> 3); \ 3287 b -= c; b -= a; b ^= (a << 10); \ 3288 c -= a; c -= b; c ^= (b >> 15); \ 3289 } while (0) 3290 3291 mix(a, b, c); 3292 3293 #undef mix 3294 3295 return (c); 3296 } 3297 3298 static int 3299 vxlan_media_change(struct ifnet *ifp) 3300 { 3301 3302 /* Ignore. */ 3303 return (0); 3304 } 3305 3306 static void 3307 vxlan_media_status(struct ifnet *ifp, struct ifmediareq *ifmr) 3308 { 3309 3310 ifmr->ifm_status = IFM_ACTIVE | IFM_AVALID; 3311 ifmr->ifm_active = IFM_ETHER | IFM_FDX; 3312 } 3313 3314 static int 3315 vxlan_sockaddr_cmp(const union vxlan_sockaddr *vxladdr, 3316 const struct sockaddr *sa) 3317 { 3318 3319 return (bcmp(&vxladdr->sa, sa, vxladdr->sa.sa_len)); 3320 } 3321 3322 static void 3323 vxlan_sockaddr_copy(union vxlan_sockaddr *vxladdr, 3324 const struct sockaddr *sa) 3325 { 3326 3327 MPASS(sa->sa_family == AF_INET || sa->sa_family == AF_INET6); 3328 bzero(vxladdr, sizeof(*vxladdr)); 3329 3330 if (sa->sa_family == AF_INET) { 3331 vxladdr->in4 = *satoconstsin(sa); 3332 vxladdr->in4.sin_len = sizeof(struct sockaddr_in); 3333 } else if (sa->sa_family == AF_INET6) { 3334 vxladdr->in6 = *satoconstsin6(sa); 3335 vxladdr->in6.sin6_len = sizeof(struct sockaddr_in6); 3336 } 3337 } 3338 3339 static int 3340 vxlan_sockaddr_in_equal(const union vxlan_sockaddr *vxladdr, 3341 const struct sockaddr *sa) 3342 { 3343 int equal; 3344 3345 if (sa->sa_family == AF_INET) { 3346 const struct in_addr *in4 = &satoconstsin(sa)->sin_addr; 3347 equal = in4->s_addr == vxladdr->in4.sin_addr.s_addr; 3348 } else if (sa->sa_family == AF_INET6) { 3349 const struct in6_addr *in6 = &satoconstsin6(sa)->sin6_addr; 3350 equal = IN6_ARE_ADDR_EQUAL(in6, &vxladdr->in6.sin6_addr); 3351 } else 3352 equal = 0; 3353 3354 return (equal); 3355 } 3356 3357 static void 3358 vxlan_sockaddr_in_copy(union vxlan_sockaddr *vxladdr, 3359 const struct sockaddr *sa) 3360 { 3361 3362 MPASS(sa->sa_family == AF_INET || sa->sa_family == AF_INET6); 3363 3364 if (sa->sa_family == AF_INET) { 3365 const struct in_addr *in4 = &satoconstsin(sa)->sin_addr; 3366 vxladdr->in4.sin_family = AF_INET; 3367 vxladdr->in4.sin_len = sizeof(struct sockaddr_in); 3368 vxladdr->in4.sin_addr = *in4; 3369 } else if (sa->sa_family == AF_INET6) { 3370 const struct in6_addr *in6 = &satoconstsin6(sa)->sin6_addr; 3371 vxladdr->in6.sin6_family = AF_INET6; 3372 vxladdr->in6.sin6_len = sizeof(struct sockaddr_in6); 3373 vxladdr->in6.sin6_addr = *in6; 3374 } 3375 } 3376 3377 static int 3378 vxlan_sockaddr_supported(const union vxlan_sockaddr *vxladdr, int unspec) 3379 { 3380 const struct sockaddr *sa; 3381 int supported; 3382 3383 sa = &vxladdr->sa; 3384 supported = 0; 3385 3386 if (sa->sa_family == AF_UNSPEC && unspec != 0) { 3387 supported = 1; 3388 } else if (sa->sa_family == AF_INET) { 3389 #ifdef INET 3390 supported = 1; 3391 #endif 3392 } else if (sa->sa_family == AF_INET6) { 3393 #ifdef INET6 3394 supported = 1; 3395 #endif 3396 } 3397 3398 return (supported); 3399 } 3400 3401 static int 3402 vxlan_sockaddr_in_any(const union vxlan_sockaddr *vxladdr) 3403 { 3404 const struct sockaddr *sa; 3405 int any; 3406 3407 sa = &vxladdr->sa; 3408 3409 if (sa->sa_family == AF_INET) { 3410 const struct in_addr *in4 = &satoconstsin(sa)->sin_addr; 3411 any = in4->s_addr == INADDR_ANY; 3412 } else if (sa->sa_family == AF_INET6) { 3413 const struct in6_addr *in6 = &satoconstsin6(sa)->sin6_addr; 3414 any = IN6_IS_ADDR_UNSPECIFIED(in6); 3415 } else 3416 any = -1; 3417 3418 return (any); 3419 } 3420 3421 static int 3422 vxlan_sockaddr_in_multicast(const union vxlan_sockaddr *vxladdr) 3423 { 3424 const struct sockaddr *sa; 3425 int mc; 3426 3427 sa = &vxladdr->sa; 3428 3429 if (sa->sa_family == AF_INET) { 3430 const struct in_addr *in4 = &satoconstsin(sa)->sin_addr; 3431 mc = IN_MULTICAST(ntohl(in4->s_addr)); 3432 } else if (sa->sa_family == AF_INET6) { 3433 const struct in6_addr *in6 = &satoconstsin6(sa)->sin6_addr; 3434 mc = IN6_IS_ADDR_MULTICAST(in6); 3435 } else 3436 mc = -1; 3437 3438 return (mc); 3439 } 3440 3441 static int 3442 vxlan_sockaddr_in6_embedscope(union vxlan_sockaddr *vxladdr) 3443 { 3444 int error; 3445 3446 MPASS(VXLAN_SOCKADDR_IS_IPV6(vxladdr)); 3447 #ifdef INET6 3448 error = sa6_embedscope(&vxladdr->in6, V_ip6_use_defzone); 3449 #else 3450 error = EAFNOSUPPORT; 3451 #endif 3452 3453 return (error); 3454 } 3455 3456 static int 3457 vxlan_can_change_config(struct vxlan_softc *sc) 3458 { 3459 struct ifnet *ifp; 3460 3461 ifp = sc->vxl_ifp; 3462 VXLAN_LOCK_ASSERT(sc); 3463 3464 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 3465 return (0); 3466 if (sc->vxl_flags & (VXLAN_FLAG_INIT | VXLAN_FLAG_TEARDOWN)) 3467 return (0); 3468 3469 return (1); 3470 } 3471 3472 static int 3473 vxlan_check_vni(uint32_t vni) 3474 { 3475 3476 return (vni >= VXLAN_VNI_MAX); 3477 } 3478 3479 static int 3480 vxlan_check_ttl(int ttl) 3481 { 3482 3483 return (ttl > MAXTTL); 3484 } 3485 3486 static int 3487 vxlan_check_ftable_timeout(uint32_t timeout) 3488 { 3489 3490 return (timeout > VXLAN_FTABLE_MAX_TIMEOUT); 3491 } 3492 3493 static int 3494 vxlan_check_ftable_max(uint32_t max) 3495 { 3496 3497 return (max > VXLAN_FTABLE_MAX); 3498 } 3499 3500 static void 3501 vxlan_sysctl_setup(struct vxlan_softc *sc) 3502 { 3503 struct sysctl_ctx_list *ctx; 3504 struct sysctl_oid *node; 3505 struct vxlan_statistics *stats; 3506 char namebuf[8]; 3507 3508 ctx = &sc->vxl_sysctl_ctx; 3509 stats = &sc->vxl_stats; 3510 snprintf(namebuf, sizeof(namebuf), "%d", sc->vxl_unit); 3511 3512 sysctl_ctx_init(ctx); 3513 sc->vxl_sysctl_node = SYSCTL_ADD_NODE(ctx, 3514 SYSCTL_STATIC_CHILDREN(_net_link_vxlan), OID_AUTO, namebuf, 3515 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, ""); 3516 3517 node = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(sc->vxl_sysctl_node), 3518 OID_AUTO, "ftable", CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, ""); 3519 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(node), OID_AUTO, "count", 3520 CTLFLAG_RD, &sc->vxl_ftable_cnt, 0, 3521 "Number of entries in fowarding table"); 3522 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(node), OID_AUTO, "max", 3523 CTLFLAG_RD, &sc->vxl_ftable_max, 0, 3524 "Maximum number of entries allowed in fowarding table"); 3525 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(node), OID_AUTO, "timeout", 3526 CTLFLAG_RD, &sc->vxl_ftable_timeout, 0, 3527 "Number of seconds between prunes of the forwarding table"); 3528 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(node), OID_AUTO, "dump", 3529 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE | CTLFLAG_SKIP, 3530 sc, 0, vxlan_ftable_sysctl_dump, "A", 3531 "Dump the forwarding table entries"); 3532 3533 node = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(sc->vxl_sysctl_node), 3534 OID_AUTO, "stats", CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, ""); 3535 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(node), OID_AUTO, 3536 "ftable_nospace", CTLFLAG_RD, &stats->ftable_nospace, 0, 3537 "Fowarding table reached maximum entries"); 3538 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(node), OID_AUTO, 3539 "ftable_lock_upgrade_failed", CTLFLAG_RD, 3540 &stats->ftable_lock_upgrade_failed, 0, 3541 "Forwarding table update required lock upgrade"); 3542 3543 SYSCTL_ADD_COUNTER_U64(ctx, SYSCTL_CHILDREN(node), OID_AUTO, "txcsum", 3544 CTLFLAG_RD, &stats->txcsum, 3545 "# of times hardware assisted with tx checksum"); 3546 SYSCTL_ADD_COUNTER_U64(ctx, SYSCTL_CHILDREN(node), OID_AUTO, "tso", 3547 CTLFLAG_RD, &stats->tso, "# of times hardware assisted with TSO"); 3548 SYSCTL_ADD_COUNTER_U64(ctx, SYSCTL_CHILDREN(node), OID_AUTO, "rxcsum", 3549 CTLFLAG_RD, &stats->rxcsum, 3550 "# of times hardware assisted with rx checksum"); 3551 } 3552 3553 static void 3554 vxlan_sysctl_destroy(struct vxlan_softc *sc) 3555 { 3556 3557 sysctl_ctx_free(&sc->vxl_sysctl_ctx); 3558 sc->vxl_sysctl_node = NULL; 3559 } 3560 3561 static int 3562 vxlan_tunable_int(struct vxlan_softc *sc, const char *knob, int def) 3563 { 3564 char path[64]; 3565 3566 snprintf(path, sizeof(path), "net.link.vxlan.%d.%s", 3567 sc->vxl_unit, knob); 3568 TUNABLE_INT_FETCH(path, &def); 3569 3570 return (def); 3571 } 3572 3573 static void 3574 vxlan_ifdetach_event(void *arg __unused, struct ifnet *ifp) 3575 { 3576 struct vxlan_softc_head list; 3577 struct vxlan_socket *vso; 3578 struct vxlan_softc *sc, *tsc; 3579 3580 LIST_INIT(&list); 3581 3582 if (ifp->if_flags & IFF_RENAMING) 3583 return; 3584 if ((ifp->if_flags & IFF_MULTICAST) == 0) 3585 return; 3586 3587 VXLAN_LIST_LOCK(); 3588 LIST_FOREACH(vso, &vxlan_socket_list, vxlso_entry) 3589 vxlan_socket_ifdetach(vso, ifp, &list); 3590 VXLAN_LIST_UNLOCK(); 3591 3592 LIST_FOREACH_SAFE(sc, &list, vxl_ifdetach_list, tsc) { 3593 LIST_REMOVE(sc, vxl_ifdetach_list); 3594 3595 sx_xlock(&vxlan_sx); 3596 VXLAN_WLOCK(sc); 3597 if (sc->vxl_flags & VXLAN_FLAG_INIT) 3598 vxlan_init_wait(sc); 3599 vxlan_teardown_locked(sc); 3600 sx_xunlock(&vxlan_sx); 3601 } 3602 } 3603 3604 static void 3605 vxlan_load(void) 3606 { 3607 3608 mtx_init(&vxlan_list_mtx, "vxlan list", NULL, MTX_DEF); 3609 LIST_INIT(&vxlan_socket_list); 3610 vxlan_ifdetach_event_tag = EVENTHANDLER_REGISTER(ifnet_departure_event, 3611 vxlan_ifdetach_event, NULL, EVENTHANDLER_PRI_ANY); 3612 vxlan_cloner = if_clone_simple(vxlan_name, vxlan_clone_create, 3613 vxlan_clone_destroy, 0); 3614 } 3615 3616 static void 3617 vxlan_unload(void) 3618 { 3619 3620 EVENTHANDLER_DEREGISTER(ifnet_departure_event, 3621 vxlan_ifdetach_event_tag); 3622 if_clone_detach(vxlan_cloner); 3623 mtx_destroy(&vxlan_list_mtx); 3624 MPASS(LIST_EMPTY(&vxlan_socket_list)); 3625 } 3626 3627 static int 3628 vxlan_modevent(module_t mod, int type, void *unused) 3629 { 3630 int error; 3631 3632 error = 0; 3633 3634 switch (type) { 3635 case MOD_LOAD: 3636 vxlan_load(); 3637 break; 3638 case MOD_UNLOAD: 3639 vxlan_unload(); 3640 break; 3641 default: 3642 error = ENOTSUP; 3643 break; 3644 } 3645 3646 return (error); 3647 } 3648 3649 static moduledata_t vxlan_mod = { 3650 "if_vxlan", 3651 vxlan_modevent, 3652 0 3653 }; 3654 3655 DECLARE_MODULE(if_vxlan, vxlan_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 3656 MODULE_VERSION(if_vxlan, 1); 3657