if_bridgevar.h revision 1.22
1 /* $NetBSD: if_bridgevar.h,v 1.22 2015/01/08 10:47:44 ozaki-r Exp $ */ 2 3 /* 4 * Copyright 2001 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /* 39 * Copyright (c) 1999, 2000 Jason L. Wright (jason (at) thought.net) 40 * All rights reserved. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. All advertising materials mentioning features or use of this software 51 * must display the following acknowledgement: 52 * This product includes software developed by Jason L. Wright 53 * 4. The name of the author may not be used to endorse or promote products 54 * derived from this software without specific prior written permission. 55 * 56 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 57 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 58 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 59 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 60 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 61 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 62 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 63 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 64 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 65 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 66 * POSSIBILITY OF SUCH DAMAGE. 67 * 68 * OpenBSD: if_bridge.h,v 1.14 2001/03/22 03:48:29 jason Exp 69 */ 70 71 /* 72 * Data structure and control definitions for bridge interfaces. 73 */ 74 75 #ifndef _NET_IF_BRIDGEVAR_H_ 76 #define _NET_IF_BRIDGEVAR_H_ 77 78 #include <sys/callout.h> 79 #include <sys/queue.h> 80 #include <sys/mutex.h> 81 #include <sys/condvar.h> 82 83 /* 84 * Commands used in the SIOCSDRVSPEC ioctl. Note the lookup of the 85 * bridge interface itself is keyed off the ifdrv structure. 86 */ 87 #define BRDGADD 0 /* add bridge member (ifbreq) */ 88 #define BRDGDEL 1 /* delete bridge member (ifbreq) */ 89 #define BRDGGIFFLGS 2 /* get member if flags (ifbreq) */ 90 #define BRDGSIFFLGS 3 /* set member if flags (ifbreq) */ 91 #define BRDGSCACHE 4 /* set cache size (ifbrparam) */ 92 #define BRDGGCACHE 5 /* get cache size (ifbrparam) */ 93 #define BRDGGIFS 6 /* get member list (ifbifconf) */ 94 #define BRDGRTS 7 /* get address list (ifbaconf) */ 95 #define BRDGSADDR 8 /* set static address (ifbareq) */ 96 #define BRDGSTO 9 /* set cache timeout (ifbrparam) */ 97 #define BRDGGTO 10 /* get cache timeout (ifbrparam) */ 98 #define BRDGDADDR 11 /* delete address (ifbareq) */ 99 #define BRDGFLUSH 12 /* flush address cache (ifbreq) */ 100 101 #define BRDGGPRI 13 /* get priority (ifbrparam) */ 102 #define BRDGSPRI 14 /* set priority (ifbrparam) */ 103 #define BRDGGHT 15 /* get hello time (ifbrparam) */ 104 #define BRDGSHT 16 /* set hello time (ifbrparam) */ 105 #define BRDGGFD 17 /* get forward delay (ifbrparam) */ 106 #define BRDGSFD 18 /* set forward delay (ifbrparam) */ 107 #define BRDGGMA 19 /* get max age (ifbrparam) */ 108 #define BRDGSMA 20 /* set max age (ifbrparam) */ 109 #define BRDGSIFPRIO 21 /* set if priority (ifbreq) */ 110 #define BRDGSIFCOST 22 /* set if path cost (ifbreq) */ 111 #define BRDGGFILT 23 /* get filter flags (ifbrparam) */ 112 #define BRDGSFILT 24 /* set filter flags (ifbrparam) */ 113 114 /* 115 * Generic bridge control request. 116 */ 117 struct ifbreq { 118 char ifbr_ifsname[IFNAMSIZ]; /* member if name */ 119 uint32_t ifbr_ifsflags; /* member if flags */ 120 uint8_t ifbr_state; /* member if STP state */ 121 uint8_t ifbr_priority; /* member if STP priority */ 122 uint8_t ifbr_path_cost; /* member if STP cost */ 123 uint8_t ifbr_portno; /* member if port number */ 124 }; 125 126 /* BRDGGIFFLAGS, BRDGSIFFLAGS */ 127 #define IFBIF_LEARNING 0x01 /* if can learn */ 128 #define IFBIF_DISCOVER 0x02 /* if sends packets w/ unknown dest. */ 129 #define IFBIF_STP 0x04 /* if participates in spanning tree */ 130 131 #define IFBIFBITS "\020\1LEARNING\2DISCOVER\3STP" 132 133 /* BRDGFLUSH */ 134 #define IFBF_FLUSHDYN 0x00 /* flush learned addresses only */ 135 #define IFBF_FLUSHALL 0x01 /* flush all addresses */ 136 137 /* BRDGSFILT */ 138 #define IFBF_FILT_USEIPF 0x00000001 /* enable ipf on bridge */ 139 #define IFBF_FILT_MASK 0x00000001 /* mask of valid values */ 140 141 /* STP port states */ 142 #define BSTP_IFSTATE_DISABLED 0 143 #define BSTP_IFSTATE_LISTENING 1 144 #define BSTP_IFSTATE_LEARNING 2 145 #define BSTP_IFSTATE_FORWARDING 3 146 #define BSTP_IFSTATE_BLOCKING 4 147 148 /* 149 * Interface list structure. 150 */ 151 struct ifbifconf { 152 uint32_t ifbic_len; /* buffer size */ 153 union { 154 void * ifbicu_buf; 155 struct ifbreq *ifbicu_req; 156 } ifbic_ifbicu; 157 #define ifbic_buf ifbic_ifbicu.ifbicu_buf 158 #define ifbic_req ifbic_ifbicu.ifbicu_req 159 }; 160 161 /* 162 * Bridge address request. 163 */ 164 struct ifbareq { 165 char ifba_ifsname[IFNAMSIZ]; /* member if name */ 166 /*XXX: time_t */ 167 long ifba_expire; /* address expire time */ 168 uint8_t ifba_flags; /* address flags */ 169 uint8_t ifba_dst[ETHER_ADDR_LEN];/* destination address */ 170 }; 171 172 #define IFBAF_TYPEMASK 0x03 /* address type mask */ 173 #define IFBAF_DYNAMIC 0x00 /* dynamically learned address */ 174 #define IFBAF_STATIC 0x01 /* static address */ 175 176 #define IFBAFBITS "\020\1STATIC" 177 178 /* 179 * Address list structure. 180 */ 181 struct ifbaconf { 182 uint32_t ifbac_len; /* buffer size */ 183 union { 184 void *ifbacu_buf; 185 struct ifbareq *ifbacu_req; 186 } ifbac_ifbacu; 187 #define ifbac_buf ifbac_ifbacu.ifbacu_buf 188 #define ifbac_req ifbac_ifbacu.ifbacu_req 189 }; 190 191 /* 192 * Bridge parameter structure. 193 */ 194 struct ifbrparam { 195 union { 196 uint32_t ifbrpu_int32; 197 uint16_t ifbrpu_int16; 198 uint8_t ifbrpu_int8; 199 } ifbrp_ifbrpu; 200 }; 201 #define ifbrp_csize ifbrp_ifbrpu.ifbrpu_int32 /* cache size */ 202 #define ifbrp_ctime ifbrp_ifbrpu.ifbrpu_int32 /* cache time (sec) */ 203 #define ifbrp_prio ifbrp_ifbrpu.ifbrpu_int16 /* bridge priority */ 204 #define ifbrp_hellotime ifbrp_ifbrpu.ifbrpu_int8 /* hello time (sec) */ 205 #define ifbrp_fwddelay ifbrp_ifbrpu.ifbrpu_int8 /* fwd time (sec) */ 206 #define ifbrp_maxage ifbrp_ifbrpu.ifbrpu_int8 /* max age (sec) */ 207 #define ifbrp_filter ifbrp_ifbrpu.ifbrpu_int32 /* filtering flags */ 208 209 #ifdef _KERNEL 210 #include <sys/pserialize.h> 211 #include <sys/workqueue.h> 212 213 #include <net/pktqueue.h> 214 215 /* 216 * Timekeeping structure used in spanning tree code. 217 */ 218 struct bridge_timer { 219 uint16_t active; 220 uint16_t value; 221 }; 222 223 struct bstp_config_unit { 224 uint64_t cu_rootid; 225 uint64_t cu_bridge_id; 226 uint32_t cu_root_path_cost; 227 uint16_t cu_message_age; 228 uint16_t cu_max_age; 229 uint16_t cu_hello_time; 230 uint16_t cu_forward_delay; 231 uint16_t cu_port_id; 232 uint8_t cu_message_type; 233 uint8_t cu_topology_change_acknowledgment; 234 uint8_t cu_topology_change; 235 }; 236 237 struct bstp_tcn_unit { 238 uint8_t tu_message_type; 239 }; 240 241 /* 242 * Bridge interface list entry. 243 */ 244 struct bridge_iflist { 245 LIST_ENTRY(bridge_iflist) bif_next; 246 uint64_t bif_designated_root; 247 uint64_t bif_designated_bridge; 248 uint32_t bif_path_cost; 249 uint32_t bif_designated_cost; 250 struct bridge_timer bif_hold_timer; 251 struct bridge_timer bif_message_age_timer; 252 struct bridge_timer bif_forward_delay_timer; 253 uint16_t bif_port_id; 254 uint16_t bif_designated_port; 255 struct bstp_config_unit bif_config_bpdu; 256 uint8_t bif_state; 257 uint8_t bif_topology_change_acknowledge; 258 uint8_t bif_config_pending; 259 uint8_t bif_change_detection_enabled; 260 uint8_t bif_priority; 261 struct ifnet *bif_ifp; /* member if */ 262 uint32_t bif_flags; /* member if flags */ 263 uint32_t bif_refs; /* reference count */ 264 bool bif_waiting; /* waiting for released */ 265 }; 266 267 /* 268 * Bridge route node. 269 */ 270 struct bridge_rtnode { 271 LIST_ENTRY(bridge_rtnode) brt_hash; /* hash table linkage */ 272 LIST_ENTRY(bridge_rtnode) brt_list; /* list linkage */ 273 struct ifnet *brt_ifp; /* destination if */ 274 time_t brt_expire; /* expiration time */ 275 uint8_t brt_flags; /* address flags */ 276 uint8_t brt_addr[ETHER_ADDR_LEN]; 277 }; 278 279 /* 280 * Software state for each bridge. 281 */ 282 struct bridge_softc { 283 struct ifnet sc_if; 284 LIST_ENTRY(bridge_softc) sc_list; 285 uint64_t sc_designated_root; 286 uint64_t sc_bridge_id; 287 struct bridge_iflist *sc_root_port; 288 uint32_t sc_root_path_cost; 289 uint16_t sc_max_age; 290 uint16_t sc_hello_time; 291 uint16_t sc_forward_delay; 292 uint16_t sc_bridge_max_age; 293 uint16_t sc_bridge_hello_time; 294 uint16_t sc_bridge_forward_delay; 295 uint16_t sc_topology_change_time; 296 uint16_t sc_hold_time; 297 uint16_t sc_bridge_priority; 298 uint8_t sc_topology_change_detected; 299 uint8_t sc_topology_change; 300 struct bridge_timer sc_hello_timer; 301 struct bridge_timer sc_topology_change_timer; 302 struct bridge_timer sc_tcn_timer; 303 uint32_t sc_brtmax; /* max # of addresses */ 304 uint32_t sc_brtcnt; /* cur. # of addresses */ 305 uint32_t sc_brttimeout; /* rt timeout in seconds */ 306 callout_t sc_brcallout; /* bridge callout */ 307 callout_t sc_bstpcallout; /* STP callout */ 308 LIST_HEAD(, bridge_iflist) sc_iflist; /* member interface list */ 309 kmutex_t *sc_iflist_intr_lock; 310 kcondvar_t sc_iflist_cv; 311 pserialize_t sc_iflist_psz; 312 kmutex_t *sc_iflist_lock; 313 LIST_HEAD(, bridge_rtnode) *sc_rthash; /* our forwarding table */ 314 LIST_HEAD(, bridge_rtnode) sc_rtlist; /* list version of above */ 315 kmutex_t *sc_rtlist_intr_lock; 316 kmutex_t *sc_rtlist_lock; 317 pserialize_t sc_rtlist_psz; 318 struct workqueue *sc_rtage_wq; 319 uint32_t sc_rthash_key; /* key for hash */ 320 uint32_t sc_filter_flags; /* ipf and flags */ 321 pktqueue_t * sc_fwd_pktq; 322 }; 323 324 extern const uint8_t bstp_etheraddr[]; 325 326 void bridge_ifdetach(struct ifnet *); 327 328 int bridge_output(struct ifnet *, struct mbuf *, const struct sockaddr *, 329 struct rtentry *); 330 331 void bstp_initialization(struct bridge_softc *); 332 void bstp_stop(struct bridge_softc *); 333 void bstp_input(struct bridge_softc *, struct bridge_iflist *, struct mbuf *); 334 335 void bridge_enqueue(struct bridge_softc *, struct ifnet *, struct mbuf *, 336 int); 337 338 #ifdef NET_MPSAFE 339 #define BRIDGE_MPSAFE 1 340 #endif 341 342 #define BRIDGE_LOCK(_sc) if ((_sc)->sc_iflist_lock) \ 343 mutex_enter((_sc)->sc_iflist_lock) 344 #define BRIDGE_UNLOCK(_sc) if ((_sc)->sc_iflist_lock) \ 345 mutex_exit((_sc)->sc_iflist_lock) 346 #define BRIDGE_LOCKED(_sc) (!(_sc)->sc_iflist_lock || \ 347 mutex_owned((_sc)->sc_iflist_lock)) 348 349 #define BRIDGE_INTR_LOCK(_sc) if ((_sc)->sc_iflist_intr_lock) \ 350 mutex_enter((_sc)->sc_iflist_intr_lock) 351 #define BRIDGE_INTR_UNLOCK(_sc) if ((_sc)->sc_iflist_intr_lock) \ 352 mutex_exit((_sc)->sc_iflist_intr_lock) 353 #define BRIDGE_INTR_LOCKED(_sc) (!(_sc)->sc_iflist_intr_lock || \ 354 mutex_owned((_sc)->sc_iflist_intr_lock)) 355 356 #ifdef BRIDGE_MPSAFE 357 /* 358 * These macros can be used in both HW interrupt and softint contexts. 359 */ 360 #define BRIDGE_PSZ_RENTER(__s) do { \ 361 if (!cpu_intr_p()) \ 362 __s = pserialize_read_enter(); \ 363 else \ 364 __s = splhigh(); \ 365 } while (0) 366 #define BRIDGE_PSZ_REXIT(__s) do { \ 367 if (!cpu_intr_p()) \ 368 pserialize_read_exit(__s); \ 369 else \ 370 splx(__s); \ 371 } while (0) 372 #else /* BRIDGE_MPSAFE */ 373 #define BRIDGE_PSZ_RENTER(__s) do { __s = 0; } while (0) 374 #define BRIDGE_PSZ_REXIT(__s) do { (void)__s; } while (0) 375 #endif /* BRIDGE_MPSAFE */ 376 377 #define BRIDGE_PSZ_PERFORM(_sc) if ((_sc)->sc_iflist_psz) \ 378 pserialize_perform((_sc)->sc_iflist_psz); 379 380 /* 381 * Locking notes: 382 * - Updates of sc_iflist are serialized by sc_iflist_lock (an adaptive mutex) 383 * - Items of sc_iflist (bridge_iflist) is protected by both pserialize 384 * (sc_iflist_psz) and reference counting (bridge_iflist#bif_refs) 385 * - Before destroying an item of sc_iflist, we have to do pserialize_perform 386 * and synchronize with the reference counting via a conditional variable 387 * (sc_iflist_cz) 388 * - sc_iflist_intr_lock (a spin mutex) is used for the CV 389 * - A spin mutex is required because the reference counting can be used 390 * in HW interrupt context 391 * - The mutex is also used for STP 392 * - Once we change to execute entire Layer 2 in softint context, 393 * we can get rid of sc_iflist_intr_lock 394 * - Updates of sc_rtlist are serialized by sc_rtlist_intr_lock (a spin mutex) 395 * - The sc_rtlist can be modified in HW interrupt context for now 396 * - sc_rtlist_lock (an adaptive mutex) is only for pserialize 397 * - Once we change to execute entire Layer 2 in softint context, 398 * we can get rid of sc_rtlist_intr_lock 399 * - A workqueue is used to run bridge_rtage in LWP context via bridge_timer callout 400 * - bridge_rtage uses pserialize that requires non-interrupt context 401 */ 402 #endif /* _KERNEL */ 403 #endif /* !_NET_IF_BRIDGEVAR_H_ */ 404
Indexes created Thu Sep 25 16:09:42 GMT 2025