if.h revision 1.280
1 /* $NetBSD: if.h,v 1.280 2020/02/01 21:59:39 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1999, 2000, 2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by William Studenmund and Jason R. Thorpe. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1982, 1986, 1989, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)if.h 8.3 (Berkeley) 2/9/95 61 */ 62 63 #ifndef _NET_IF_H_ 64 #define _NET_IF_H_ 65 66 /* 67 * Temporary, to allow for a quick disable if problems are discovered 68 * during a transition period. 69 */ 70 #define __IF_STATS_PERCPU 71 72 #if !defined(_KERNEL) && !defined(_STANDALONE) 73 #include <stdbool.h> 74 #endif 75 76 #include <sys/featuretest.h> 77 78 /* 79 * Length of interface external name, including terminating '\0'. 80 * Note: this is the same size as a generic device's external name. 81 */ 82 #define IF_NAMESIZE 16 83 84 /* 85 * Length of interface description, including terminating '\0'. 86 */ 87 #define IFDESCRSIZE 64 88 89 #if defined(_NETBSD_SOURCE) 90 91 #include <sys/socket.h> 92 #include <sys/queue.h> 93 #include <sys/mutex.h> 94 95 #include <net/dlt.h> 96 #include <net/pfil.h> 97 #ifdef _KERNEL 98 #include <net/pktqueue.h> 99 #include <sys/pslist.h> 100 #include <sys/pserialize.h> 101 #include <sys/psref.h> 102 #include <sys/module_hook.h> 103 #endif 104 105 /* 106 * Always include ALTQ glue here -- we use the ALTQ interface queue 107 * structure even when ALTQ is not configured into the kernel so that 108 * the size of struct ifnet does not changed based on the option. The 109 * ALTQ queue structure is API-compatible with the legacy ifqueue. 110 */ 111 #include <altq/if_altq.h> 112 113 /* 114 * Structures defining a network interface, providing a packet 115 * transport mechanism (ala level 0 of the PUP protocols). 116 * 117 * Each interface accepts output datagrams of a specified maximum 118 * length, and provides higher level routines with input datagrams 119 * received from its medium. 120 * 121 * Output occurs when the routine if_output is called, with four parameters: 122 * (*ifp->if_output)(ifp, m, dst, rt) 123 * Here m is the mbuf chain to be sent and dst is the destination address. 124 * The output routine encapsulates the supplied datagram if necessary, 125 * and then transmits it on its medium. 126 * 127 * On input, each interface unwraps the data received by it, and either 128 * places it on the input queue of a internetwork datagram routine 129 * and posts the associated software interrupt, or passes the datagram to a raw 130 * packet input routine. 131 * 132 * Routines exist for locating interfaces by their addresses 133 * or for locating a interface on a certain network, as well as more general 134 * routing and gateway routines maintaining information used to locate 135 * interfaces. These routines live in the files if.c and route.c 136 */ 137 #include <sys/time.h> 138 139 #if defined(_KERNEL_OPT) 140 #include "opt_compat_netbsd.h" 141 #include "opt_gateway.h" 142 #endif 143 144 struct mbuf; 145 struct proc; 146 struct rtentry; 147 struct socket; 148 struct ether_header; 149 struct ifaddr; 150 struct ifnet; 151 struct rt_addrinfo; 152 153 #define IFNAMSIZ IF_NAMESIZE 154 155 /* 156 * Structure describing a `cloning' interface. 157 */ 158 struct if_clone { 159 LIST_ENTRY(if_clone) ifc_list; /* on list of cloners */ 160 const char *ifc_name; /* name of device, e.g. `gif' */ 161 size_t ifc_namelen; /* length of name */ 162 163 int (*ifc_create)(struct if_clone *, int); 164 int (*ifc_destroy)(struct ifnet *); 165 }; 166 167 #define IF_CLONE_INITIALIZER(name, create, destroy) \ 168 { { NULL, NULL }, name, sizeof(name) - 1, create, destroy } 169 170 /* 171 * Structure used to query names of interface cloners. 172 */ 173 struct if_clonereq { 174 int ifcr_total; /* total cloners (out) */ 175 int ifcr_count; /* room for this many in user buffer */ 176 char *ifcr_buffer; /* buffer for cloner names */ 177 }; 178 179 /* 180 * Structure defining statistics and other data kept regarding a network 181 * interface. 182 * 183 * Only used for exporting data from the interface. 184 */ 185 struct if_data { 186 /* generic interface information */ 187 u_char ifi_type; /* ethernet, tokenring, etc. */ 188 u_char ifi_addrlen; /* media address length */ 189 u_char ifi_hdrlen; /* media header length */ 190 int ifi_link_state; /* current link state */ 191 uint64_t ifi_mtu; /* maximum transmission unit */ 192 uint64_t ifi_metric; /* routing metric (external only) */ 193 uint64_t ifi_baudrate; /* linespeed */ 194 /* volatile statistics */ 195 uint64_t ifi_ipackets; /* packets received on interface */ 196 uint64_t ifi_ierrors; /* input errors on interface */ 197 uint64_t ifi_opackets; /* packets sent on interface */ 198 uint64_t ifi_oerrors; /* output errors on interface */ 199 uint64_t ifi_collisions; /* collisions on csma interfaces */ 200 uint64_t ifi_ibytes; /* total number of octets received */ 201 uint64_t ifi_obytes; /* total number of octets sent */ 202 uint64_t ifi_imcasts; /* packets received via multicast */ 203 uint64_t ifi_omcasts; /* packets sent via multicast */ 204 uint64_t ifi_iqdrops; /* dropped on input, this interface */ 205 uint64_t ifi_noproto; /* destined for unsupported protocol */ 206 struct timespec ifi_lastchange;/* last operational state change */ 207 }; 208 209 /* 210 * Values for if_link_state. 211 */ 212 #define LINK_STATE_UNKNOWN 0 /* link invalid/unknown */ 213 #define LINK_STATE_DOWN 1 /* link is down */ 214 #define LINK_STATE_UP 2 /* link is up */ 215 216 /* 217 * Structure defining a queue for a network interface. 218 */ 219 struct ifqueue { 220 struct mbuf *ifq_head; 221 struct mbuf *ifq_tail; 222 int ifq_len; 223 int ifq_maxlen; 224 int ifq_drops; 225 kmutex_t *ifq_lock; 226 }; 227 228 #ifdef _KERNEL 229 #include <sys/percpu.h> 230 #include <sys/callout.h> 231 #include <sys/rwlock.h> 232 233 #endif /* _KERNEL */ 234 235 /* 236 * Structure defining a queue for a network interface. 237 * 238 * (Would like to call this struct ``if'', but C isn't PL/1.) 239 */ 240 TAILQ_HEAD(ifnet_head, ifnet); /* the actual queue head */ 241 242 struct bridge_softc; 243 struct bridge_iflist; 244 struct callout; 245 struct krwlock; 246 struct if_percpuq; 247 struct if_deferred_start; 248 struct in6_multi; 249 250 typedef unsigned short if_index_t; 251 252 /* 253 * Interface. Field markings and the corresponding locks: 254 * 255 * i: IFNET_LOCK (a.k.a., if_ioctl_lock) 256 * q: ifq_lock (struct ifaltq) 257 * a: if_afdata_lock 258 * 6: in6_multilock (global lock) 259 * :: unlocked, stable 260 * ?: unknown, maybe unsafe 261 * 262 * Lock order: IFNET_LOCK => in6_multilock => if_afdata_lock => ifq_lock 263 * Note that currently if_afdata_lock and ifq_lock aren't held 264 * at the same time, but define the order anyway. 265 * 266 * Lock order of IFNET_LOCK with other locks: 267 * softnet_lock => solock => IFNET_LOCK => ND6_LOCK, in_multilock 268 */ 269 typedef struct ifnet { 270 void *if_softc; /* :: lower-level data for this if */ 271 /* DEPRECATED. Keep it to avoid breaking kvm(3) users */ 272 TAILQ_ENTRY(ifnet) 273 if_list; /* i: all struct ifnets are chained */ 274 TAILQ_HEAD(, ifaddr) 275 if_addrlist; /* i: linked list of addresses per if */ 276 char if_xname[IFNAMSIZ]; 277 /* :: external name (name + unit) */ 278 int if_pcount; /* i: number of promiscuous listeners */ 279 struct bpf_if *if_bpf; /* :: packet filter structure */ 280 if_index_t if_index; /* :: numeric abbreviation for this if */ 281 short if_timer; /* ?: time 'til if_slowtimo called */ 282 unsigned short if_flags; /* i: up/down, broadcast, etc. */ 283 short if_extflags; /* :: if_output MP-safe, etc. */ 284 #ifdef __IF_STATS_PERCPU 285 u_char if_type; /* :: ethernet, tokenring, etc. */ 286 u_char if_addrlen; /* :: media address length */ 287 u_char if_hdrlen; /* :: media header length */ 288 /* XXX audit :? fields here. */ 289 int if_link_state; /* :? current link state */ 290 uint64_t if_mtu; /* :? maximum transmission unit */ 291 uint64_t if_metric; /* :? routing metric (external only) */ 292 uint64_t if_baudrate; /* :? linespeed */ 293 struct timespec if_lastchange; /* :? last operational state change */ 294 #ifdef _KERNEL 295 percpu_t *if_stats; /* :: statistics */ 296 #else 297 void *if_stats; /* opaque to user-space */ 298 #endif /* _KERNEL */ 299 #else /* ! __IF_STATS_PERCPU */ 300 struct if_data if_data; /* ?: statistics and other data */ 301 #endif /* __IF_STATS_PERCPU */ 302 /* 303 * Procedure handles. If you add more of these, don't forget the 304 * corresponding NULL stub in if.c. 305 */ 306 int (*if_output) /* :: output routine (enqueue) */ 307 (struct ifnet *, struct mbuf *, const struct sockaddr *, 308 const struct rtentry *); 309 void (*_if_input) /* :: input routine (from h/w driver) */ 310 (struct ifnet *, struct mbuf *); 311 void (*if_start) /* :: initiate output routine */ 312 (struct ifnet *); 313 int (*if_transmit) /* :: output routine, must be MP-safe */ 314 (struct ifnet *, struct mbuf *); 315 int (*if_ioctl) /* :: ioctl routine */ 316 (struct ifnet *, u_long, void *); 317 int (*if_init) /* :: init routine */ 318 (struct ifnet *); 319 void (*if_stop) /* :: stop routine */ 320 (struct ifnet *, int); 321 void (*if_slowtimo) /* :: timer routine */ 322 (struct ifnet *); 323 #define if_watchdog if_slowtimo 324 void (*if_drain) /* :: routine to release resources */ 325 (struct ifnet *); 326 struct ifaltq if_snd; /* q: output queue (includes altq) */ 327 struct ifaddr *if_dl; /* i: identity of this interface. */ 328 const struct sockaddr_dl 329 *if_sadl; /* i: pointer to sockaddr_dl of if_dl */ 330 /* 331 * May be NULL. If not NULL, it is the address assigned 332 * to the interface by the manufacturer, so it very likely 333 * to be unique. It MUST NOT be deleted. It is highly 334 * suitable for deriving the EUI64 for the interface. 335 */ 336 struct ifaddr *if_hwdl; /* i: h/w identity */ 337 const uint8_t *if_broadcastaddr; 338 /* :: linklevel broadcast bytestring */ 339 struct bridge_softc 340 *if_bridge; /* i: bridge glue */ 341 struct bridge_iflist 342 *if_bridgeif; /* i: shortcut to interface list entry */ 343 int if_dlt; /* :: data link type (<net/dlt.h>) */ 344 pfil_head_t * if_pfil; /* :: filtering point */ 345 uint64_t if_capabilities; 346 /* i: interface capabilities */ 347 uint64_t if_capenable; /* i: capabilities enabled */ 348 union { 349 void * carp_s; /* carp structure (used by !carp ifs) */ 350 struct ifnet *carp_d;/* ptr to carpdev (used by carp ifs) */ 351 } if_carp_ptr; /* ?: */ 352 #define if_carp if_carp_ptr.carp_s 353 #define if_carpdev if_carp_ptr.carp_d 354 /* 355 * These are pre-computed based on an interfaces enabled 356 * capabilities, for speed elsewhere. 357 */ 358 int if_csum_flags_tx; 359 /* i: M_CSUM_* flags for Tx */ 360 int if_csum_flags_rx; 361 /* i: M_CSUM_* flags for Rx */ 362 363 void *if_afdata[AF_MAX]; 364 /* a: */ 365 struct mowner *if_mowner; /* ?: who owns mbufs for this interface */ 366 367 void *if_agrprivate; /* ?: used only when #if NAGR > 0 */ 368 void *if_npf_private;/* ?: associated NPF context */ 369 370 /* 371 * pf specific data, used only when #if NPF > 0. 372 */ 373 void *if_pf_kif; /* ?: pf interface abstraction */ 374 void *if_pf_groups; /* ?: pf interface groups */ 375 /* 376 * During an ifnet's lifetime, it has only one if_index, but 377 * and if_index is not sufficient to identify an ifnet 378 * because during the lifetime of the system, many ifnets may occupy a 379 * given if_index. Let us tell different ifnets at the same 380 * if_index apart by their if_index_gen, a unique number that each ifnet 381 * is assigned when it if_attach()s. Now, the kernel can use the 382 * pair (if_index, if_index_gen) as a weak reference to an ifnet. 383 */ 384 uint64_t if_index_gen; /* :: generation number for the ifnet 385 * at if_index: if two ifnets' index 386 * and generation number are both the 387 * same, they are the same ifnet. 388 */ 389 struct sysctllog 390 *if_sysctl_log; /* :: */ 391 int (*if_initaddr) /* :: */ 392 (struct ifnet *, struct ifaddr *, bool); 393 int (*if_mcastop) /* :: */ 394 (struct ifnet *, const unsigned long, 395 const struct sockaddr *); 396 int (*if_setflags) /* :: */ 397 (struct ifnet *, const u_short); 398 kmutex_t *if_ioctl_lock; /* :: */ 399 char *if_description; /* i: interface description */ 400 #ifdef _KERNEL /* XXX kvm(3) */ 401 struct callout *if_slowtimo_ch;/* :: */ 402 struct krwlock *if_afdata_lock;/* :: */ 403 struct if_percpuq 404 *if_percpuq; /* :: we should remove it in the future */ 405 void *if_link_si; /* :: softint to handle link state changes */ 406 uint16_t if_link_queue; /* q: masked link state change queue */ 407 struct pslist_entry 408 if_pslist_entry;/* i: */ 409 struct psref_target 410 if_psref; /* :: */ 411 struct pslist_head 412 if_addr_pslist; /* i: */ 413 struct if_deferred_start 414 *if_deferred_start; 415 /* :: */ 416 /* XXX should be protocol independent */ 417 LIST_HEAD(, in6_multi) 418 if_multiaddrs; /* 6: */ 419 #endif 420 } ifnet_t; 421 422 #include <net/if_stats.h> 423 424 #ifndef __IF_STATS_PERCPU 425 #define if_mtu if_data.ifi_mtu 426 #define if_type if_data.ifi_type 427 #define if_addrlen if_data.ifi_addrlen 428 #define if_hdrlen if_data.ifi_hdrlen 429 #define if_metric if_data.ifi_metric 430 #define if_link_state if_data.ifi_link_state 431 #define if_baudrate if_data.ifi_baudrate 432 #define if_ipackets if_data.ifi_ipackets 433 #define if_ierrors if_data.ifi_ierrors 434 #define if_opackets if_data.ifi_opackets 435 #define if_oerrors if_data.ifi_oerrors 436 #define if_collisions if_data.ifi_collisions 437 #define if_ibytes if_data.ifi_ibytes 438 #define if_obytes if_data.ifi_obytes 439 #define if_imcasts if_data.ifi_imcasts 440 #define if_omcasts if_data.ifi_omcasts 441 #define if_iqdrops if_data.ifi_iqdrops 442 #define if_noproto if_data.ifi_noproto 443 #define if_lastchange if_data.ifi_lastchange 444 #endif /* __IF_STATS_PERCPU */ 445 #define if_name(ifp) ((ifp)->if_xname) 446 447 #define IFF_UP 0x0001 /* interface is up */ 448 #define IFF_BROADCAST 0x0002 /* broadcast address valid */ 449 #define IFF_DEBUG 0x0004 /* turn on debugging */ 450 #define IFF_LOOPBACK 0x0008 /* is a loopback net */ 451 #define IFF_POINTOPOINT 0x0010 /* interface is point-to-point link */ 452 /* 0x0020 was IFF_NOTRAILERS */ 453 #define IFF_RUNNING 0x0040 /* resources allocated */ 454 #define IFF_NOARP 0x0080 /* no address resolution protocol */ 455 #define IFF_PROMISC 0x0100 /* receive all packets */ 456 #define IFF_ALLMULTI 0x0200 /* receive all multicast packets */ 457 #define IFF_OACTIVE 0x0400 /* transmission in progress */ 458 #define IFF_SIMPLEX 0x0800 /* can't hear own transmissions */ 459 #define IFF_LINK0 0x1000 /* per link layer defined bit */ 460 #define IFF_LINK1 0x2000 /* per link layer defined bit */ 461 #define IFF_LINK2 0x4000 /* per link layer defined bit */ 462 #define IFF_MULTICAST 0x8000 /* supports multicast */ 463 464 #define IFEF_MPSAFE __BIT(0) /* handlers can run in parallel (see below) */ 465 #define IFEF_NO_LINK_STATE_CHANGE __BIT(1) /* doesn't use link state interrupts */ 466 467 /* 468 * The guidelines for converting an interface to IFEF_MPSAFE are as follows 469 * 470 * Enabling IFEF_MPSAFE on an interface suppresses taking KERNEL_LOCK when 471 * calling the following handlers: 472 * - if_start 473 * - Note that if_transmit is always called without KERNEL_LOCK 474 * - if_output 475 * - if_ioctl 476 * - if_init 477 * - if_stop 478 * 479 * This means that an interface with IFEF_MPSAFE must make the above handlers 480 * MP-safe or take KERNEL_LOCK by itself inside handlers that aren't MP-safe 481 * yet. 482 * 483 * There are some additional restrictions to access member variables of struct 484 * ifnet: 485 * - if_flags 486 * - Must be updated with holding IFNET_LOCK 487 * - You cannot use the flag in Tx/Rx paths anymore because there is no 488 * synchronization on the flag except for IFNET_LOCK 489 * - Note that IFNET_LOCK can't be taken in softint because it's known 490 * that it causes a deadlock 491 * - Some synchronization mechanisms such as pserialize_perform are called 492 * with IFNET_LOCK and also require context switches on every CPUs 493 * that mean softints finish so trying to take IFNET_LOCK in softint 494 * might block on IFNET_LOCK and prevent such synchronization mechanisms 495 * from being completed 496 * - Currently the deadlock occurs only if NET_MPSAFE is enabled, however, 497 * we should deal with the restriction because NET_MPSAFE will be enabled 498 * by default in the future 499 * - if_watchdog and if_timer 500 * - The watchdog framework works only for non-IFEF_MPSAFE interfaces 501 * that rely on KERNEL_LOCK 502 * - Interfaces with IFEF_MPSAFE have to provide its own watchdog mechanism 503 * if needed 504 * - Keep if_watchdog NULL when calling if_attach 505 */ 506 507 #ifdef _KERNEL 508 static __inline bool 509 if_is_mpsafe(struct ifnet *ifp) 510 { 511 512 return ((ifp->if_extflags & IFEF_MPSAFE) != 0); 513 } 514 515 static __inline int 516 if_output_lock(struct ifnet *cifp, struct ifnet *ifp, struct mbuf *m, 517 const struct sockaddr *dst, const struct rtentry *rt) 518 { 519 520 if (if_is_mpsafe(cifp)) { 521 return (*cifp->if_output)(ifp, m, dst, rt); 522 } else { 523 int ret; 524 525 KERNEL_LOCK(1, NULL); 526 ret = (*cifp->if_output)(ifp, m, dst, rt); 527 KERNEL_UNLOCK_ONE(NULL); 528 return ret; 529 } 530 } 531 532 static __inline void 533 if_start_lock(struct ifnet *ifp) 534 { 535 536 if (if_is_mpsafe(ifp)) { 537 (*ifp->if_start)(ifp); 538 } else { 539 KERNEL_LOCK(1, NULL); 540 (*ifp->if_start)(ifp); 541 KERNEL_UNLOCK_ONE(NULL); 542 } 543 } 544 545 static __inline bool 546 if_is_link_state_changeable(struct ifnet *ifp) 547 { 548 549 return ((ifp->if_extflags & IFEF_NO_LINK_STATE_CHANGE) == 0); 550 } 551 552 #define KERNEL_LOCK_IF_IFP_MPSAFE(ifp) \ 553 do { if (if_is_mpsafe(ifp)) { KERNEL_LOCK(1, NULL); } } while (0) 554 #define KERNEL_UNLOCK_IF_IFP_MPSAFE(ifp) \ 555 do { if (if_is_mpsafe(ifp)) { KERNEL_UNLOCK_ONE(NULL); } } while (0) 556 557 #define KERNEL_LOCK_UNLESS_IFP_MPSAFE(ifp) \ 558 do { if (!if_is_mpsafe(ifp)) { KERNEL_LOCK(1, NULL); } } while (0) 559 #define KERNEL_UNLOCK_UNLESS_IFP_MPSAFE(ifp) \ 560 do { if (!if_is_mpsafe(ifp)) { KERNEL_UNLOCK_ONE(NULL); } } while (0) 561 562 #ifdef _KERNEL_OPT 563 #include "opt_net_mpsafe.h" 564 #endif 565 566 /* XXX explore a better place to define */ 567 #ifdef NET_MPSAFE 568 569 #define KERNEL_LOCK_UNLESS_NET_MPSAFE() do { } while (0) 570 #define KERNEL_UNLOCK_UNLESS_NET_MPSAFE() do { } while (0) 571 572 #define SOFTNET_LOCK_UNLESS_NET_MPSAFE() do { } while (0) 573 #define SOFTNET_UNLOCK_UNLESS_NET_MPSAFE() do { } while (0) 574 575 #define SOFTNET_LOCK_IF_NET_MPSAFE() \ 576 do { mutex_enter(softnet_lock); } while (0) 577 #define SOFTNET_UNLOCK_IF_NET_MPSAFE() \ 578 do { mutex_exit(softnet_lock); } while (0) 579 580 #else /* NET_MPSAFE */ 581 582 #define KERNEL_LOCK_UNLESS_NET_MPSAFE() \ 583 do { KERNEL_LOCK(1, NULL); } while (0) 584 #define KERNEL_UNLOCK_UNLESS_NET_MPSAFE() \ 585 do { KERNEL_UNLOCK_ONE(NULL); } while (0) 586 587 #define SOFTNET_LOCK_UNLESS_NET_MPSAFE() \ 588 do { mutex_enter(softnet_lock); } while (0) 589 #define SOFTNET_UNLOCK_UNLESS_NET_MPSAFE() \ 590 do { mutex_exit(softnet_lock); } while (0) 591 592 #define SOFTNET_LOCK_IF_NET_MPSAFE() do { } while (0) 593 #define SOFTNET_UNLOCK_IF_NET_MPSAFE() do { } while (0) 594 595 #endif /* NET_MPSAFE */ 596 597 #define SOFTNET_KERNEL_LOCK_UNLESS_NET_MPSAFE() \ 598 do { \ 599 SOFTNET_LOCK_UNLESS_NET_MPSAFE(); \ 600 KERNEL_LOCK_UNLESS_NET_MPSAFE(); \ 601 } while (0) 602 603 #define SOFTNET_KERNEL_UNLOCK_UNLESS_NET_MPSAFE() \ 604 do { \ 605 KERNEL_UNLOCK_UNLESS_NET_MPSAFE(); \ 606 SOFTNET_UNLOCK_UNLESS_NET_MPSAFE(); \ 607 } while (0) 608 609 #endif /* _KERNEL */ 610 611 #define IFFBITS \ 612 "\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT" \ 613 "\7RUNNING\10NOARP\11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX" \ 614 "\15LINK0\16LINK1\17LINK2\20MULTICAST" 615 616 /* flags set internally only: */ 617 #define IFF_CANTCHANGE \ 618 (IFF_BROADCAST|IFF_POINTOPOINT|IFF_RUNNING|IFF_OACTIVE|\ 619 IFF_SIMPLEX|IFF_MULTICAST|IFF_ALLMULTI|IFF_PROMISC) 620 621 /* 622 * Some convenience macros used for setting ifi_baudrate. 623 */ 624 #define IF_Kbps(x) ((x) * 1000ULL) /* kilobits/sec. */ 625 #define IF_Mbps(x) (IF_Kbps((x) * 1000ULL)) /* megabits/sec. */ 626 #define IF_Gbps(x) (IF_Mbps((x) * 1000ULL)) /* gigabits/sec. */ 627 628 /* Capabilities that interfaces can advertise. */ 629 /* 0x01 .. 0x40 were previously used */ 630 #define IFCAP_TSOv4 0x00080 /* can do TCPv4 segmentation offload */ 631 #define IFCAP_CSUM_IPv4_Rx 0x00100 /* can do IPv4 header checksums (Rx) */ 632 #define IFCAP_CSUM_IPv4_Tx 0x00200 /* can do IPv4 header checksums (Tx) */ 633 #define IFCAP_CSUM_TCPv4_Rx 0x00400 /* can do IPv4/TCP checksums (Rx) */ 634 #define IFCAP_CSUM_TCPv4_Tx 0x00800 /* can do IPv4/TCP checksums (Tx) */ 635 #define IFCAP_CSUM_UDPv4_Rx 0x01000 /* can do IPv4/UDP checksums (Rx) */ 636 #define IFCAP_CSUM_UDPv4_Tx 0x02000 /* can do IPv4/UDP checksums (Tx) */ 637 #define IFCAP_CSUM_TCPv6_Rx 0x04000 /* can do IPv6/TCP checksums (Rx) */ 638 #define IFCAP_CSUM_TCPv6_Tx 0x08000 /* can do IPv6/TCP checksums (Tx) */ 639 #define IFCAP_CSUM_UDPv6_Rx 0x10000 /* can do IPv6/UDP checksums (Rx) */ 640 #define IFCAP_CSUM_UDPv6_Tx 0x20000 /* can do IPv6/UDP checksums (Tx) */ 641 #define IFCAP_TSOv6 0x40000 /* can do TCPv6 segmentation offload */ 642 #define IFCAP_LRO 0x80000 /* can do Large Receive Offload */ 643 #define IFCAP_MASK 0xfff80 /* currently valid capabilities */ 644 645 #define IFCAPBITS \ 646 "\020" \ 647 "\10TSO4" \ 648 "\11IP4CSUM_Rx" \ 649 "\12IP4CSUM_Tx" \ 650 "\13TCP4CSUM_Rx" \ 651 "\14TCP4CSUM_Tx" \ 652 "\15UDP4CSUM_Rx" \ 653 "\16UDP4CSUM_Tx" \ 654 "\17TCP6CSUM_Rx" \ 655 "\20TCP6CSUM_Tx" \ 656 "\21UDP6CSUM_Rx" \ 657 "\22UDP6CSUM_Tx" \ 658 "\23TSO6" \ 659 "\24LRO" \ 660 661 #define IF_AFDATA_LOCK_INIT(ifp) \ 662 do {(ifp)->if_afdata_lock = rw_obj_alloc();} while (0) 663 664 #define IF_AFDATA_LOCK_DESTROY(ifp) rw_obj_free((ifp)->if_afdata_lock) 665 666 #define IF_AFDATA_WLOCK(ifp) rw_enter((ifp)->if_afdata_lock, RW_WRITER) 667 #define IF_AFDATA_RLOCK(ifp) rw_enter((ifp)->if_afdata_lock, RW_READER) 668 #define IF_AFDATA_WUNLOCK(ifp) rw_exit((ifp)->if_afdata_lock) 669 #define IF_AFDATA_RUNLOCK(ifp) rw_exit((ifp)->if_afdata_lock) 670 #define IF_AFDATA_LOCK(ifp) IF_AFDATA_WLOCK(ifp) 671 #define IF_AFDATA_UNLOCK(ifp) IF_AFDATA_WUNLOCK(ifp) 672 #define IF_AFDATA_TRYLOCK(ifp) rw_tryenter((ifp)->if_afdata_lock, RW_WRITER) 673 674 #define IF_AFDATA_LOCK_ASSERT(ifp) \ 675 KASSERT(rw_lock_held((ifp)->if_afdata_lock)) 676 #define IF_AFDATA_RLOCK_ASSERT(ifp) \ 677 KASSERT(rw_read_held((ifp)->if_afdata_lock)) 678 #define IF_AFDATA_WLOCK_ASSERT(ifp) \ 679 KASSERT(rw_write_held((ifp)->if_afdata_lock)) 680 681 /* 682 * Output queues (ifp->if_snd) and internetwork datagram level (pup level 1) 683 * input routines have queues of messages stored on ifqueue structures 684 * (defined above). Entries are added to and deleted from these structures 685 * by these macros, which should be called with ipl raised to splnet(). 686 */ 687 #define IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen) 688 #define IF_DROP(ifq) ((ifq)->ifq_drops++) 689 #define IF_ENQUEUE(ifq, m) do { \ 690 (m)->m_nextpkt = 0; \ 691 if ((ifq)->ifq_tail == 0) \ 692 (ifq)->ifq_head = m; \ 693 else \ 694 (ifq)->ifq_tail->m_nextpkt = m; \ 695 (ifq)->ifq_tail = m; \ 696 (ifq)->ifq_len++; \ 697 } while (/*CONSTCOND*/0) 698 #define IF_PREPEND(ifq, m) do { \ 699 (m)->m_nextpkt = (ifq)->ifq_head; \ 700 if ((ifq)->ifq_tail == 0) \ 701 (ifq)->ifq_tail = (m); \ 702 (ifq)->ifq_head = (m); \ 703 (ifq)->ifq_len++; \ 704 } while (/*CONSTCOND*/0) 705 #define IF_DEQUEUE(ifq, m) do { \ 706 (m) = (ifq)->ifq_head; \ 707 if (m) { \ 708 if (((ifq)->ifq_head = (m)->m_nextpkt) == 0) \ 709 (ifq)->ifq_tail = 0; \ 710 (m)->m_nextpkt = 0; \ 711 (ifq)->ifq_len--; \ 712 } \ 713 } while (/*CONSTCOND*/0) 714 #define IF_POLL(ifq, m) ((m) = (ifq)->ifq_head) 715 #define IF_PURGE(ifq) \ 716 do { \ 717 struct mbuf *__m0; \ 718 \ 719 for (;;) { \ 720 IF_DEQUEUE((ifq), __m0); \ 721 if (__m0 == NULL) \ 722 break; \ 723 else \ 724 m_freem(__m0); \ 725 } \ 726 } while (/*CONSTCOND*/ 0) 727 #define IF_IS_EMPTY(ifq) ((ifq)->ifq_len == 0) 728 729 #ifndef IFQ_MAXLEN 730 #define IFQ_MAXLEN 256 731 #endif 732 #define IFNET_SLOWHZ 1 /* granularity is 1 second */ 733 734 /* 735 * Structure defining statistics and other data kept regarding an address 736 * on a network interface. 737 */ 738 struct ifaddr_data { 739 int64_t ifad_inbytes; 740 int64_t ifad_outbytes; 741 }; 742 743 /* 744 * The ifaddr structure contains information about one address 745 * of an interface. They are maintained by the different address families, 746 * are allocated and attached when an address is set, and are linked 747 * together so all addresses for an interface can be located. 748 */ 749 struct ifaddr { 750 struct sockaddr *ifa_addr; /* address of interface */ 751 struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */ 752 #define ifa_broadaddr ifa_dstaddr /* broadcast address interface */ 753 struct sockaddr *ifa_netmask; /* used to determine subnet */ 754 struct ifnet *ifa_ifp; /* back-pointer to interface */ 755 TAILQ_ENTRY(ifaddr) ifa_list; /* list of addresses for interface */ 756 struct ifaddr_data ifa_data; /* statistics on the address */ 757 void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */ 758 (int, struct rtentry *, const struct rt_addrinfo *); 759 u_int ifa_flags; /* mostly rt_flags for cloning */ 760 int ifa_refcnt; /* count of references */ 761 int ifa_metric; /* cost of going out this interface */ 762 struct ifaddr *(*ifa_getifa)(struct ifaddr *, 763 const struct sockaddr *); 764 uint32_t *ifa_seqno; 765 int16_t ifa_preference; /* preference level for this address */ 766 #ifdef _KERNEL 767 struct pslist_entry ifa_pslist_entry; 768 struct psref_target ifa_psref; 769 #endif 770 }; 771 #define IFA_ROUTE RTF_UP /* (0x01) route installed */ 772 #define IFA_DESTROYING 0x2 773 774 /* 775 * Message format for use in obtaining information about interfaces from 776 * sysctl and the routing socket. We need to force 64-bit alignment if we 777 * aren't using compatiblity definitons. 778 */ 779 #if !defined(_KERNEL) || !defined(COMPAT_RTSOCK) 780 #define __align64 __aligned(sizeof(uint64_t)) 781 #else 782 #define __align64 783 #endif 784 struct if_msghdr { 785 u_short ifm_msglen __align64; 786 /* to skip over non-understood messages */ 787 u_char ifm_version; /* future binary compatibility */ 788 u_char ifm_type; /* message type */ 789 int ifm_addrs; /* like rtm_addrs */ 790 int ifm_flags; /* value of if_flags */ 791 u_short ifm_index; /* index for associated ifp */ 792 struct if_data ifm_data __align64; 793 /* statistics and other data about if */ 794 }; 795 796 /* 797 * Message format for use in obtaining information about interface addresses 798 * from sysctl and the routing socket. 799 */ 800 struct ifa_msghdr { 801 u_short ifam_msglen __align64; 802 /* to skip over non-understood messages */ 803 u_char ifam_version; /* future binary compatibility */ 804 u_char ifam_type; /* message type */ 805 u_short ifam_index; /* index for associated ifp */ 806 int ifam_flags; /* value of ifa_flags */ 807 int ifam_addrs; /* like rtm_addrs */ 808 pid_t ifam_pid; /* identify sender */ 809 int ifam_addrflags; /* family specific address flags */ 810 int ifam_metric; /* value of ifa_metric */ 811 }; 812 813 /* 814 * Message format announcing the arrival or departure of a network interface. 815 */ 816 struct if_announcemsghdr { 817 u_short ifan_msglen __align64; 818 /* to skip over non-understood messages */ 819 u_char ifan_version; /* future binary compatibility */ 820 u_char ifan_type; /* message type */ 821 u_short ifan_index; /* index for associated ifp */ 822 char ifan_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 823 u_short ifan_what; /* what type of announcement */ 824 }; 825 826 #define IFAN_ARRIVAL 0 /* interface arrival */ 827 #define IFAN_DEPARTURE 1 /* interface departure */ 828 829 #undef __align64 830 831 /* 832 * Interface request structure used for socket 833 * ioctl's. All interface ioctl's must have parameter 834 * definitions which begin with ifr_name. The 835 * remainder may be interface specific. 836 */ 837 struct ifreq { 838 char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 839 union { 840 struct sockaddr ifru_addr; 841 struct sockaddr ifru_dstaddr; 842 struct sockaddr ifru_broadaddr; 843 struct sockaddr_storage ifru_space; 844 short ifru_flags; 845 int ifru_addrflags; 846 int ifru_metric; 847 int ifru_mtu; 848 int ifru_dlt; 849 u_int ifru_value; 850 void * ifru_data; 851 struct { 852 uint32_t b_buflen; 853 void *b_buf; 854 } ifru_b; 855 } ifr_ifru; 856 #define ifr_addr ifr_ifru.ifru_addr /* address */ 857 #define ifr_dstaddr ifr_ifru.ifru_dstaddr /* other end of p-to-p link */ 858 #define ifr_broadaddr ifr_ifru.ifru_broadaddr /* broadcast address */ 859 #define ifr_space ifr_ifru.ifru_space /* sockaddr_storage */ 860 #define ifr_flags ifr_ifru.ifru_flags /* flags */ 861 #define ifr_addrflags ifr_ifru.ifru_addrflags /* addr flags */ 862 #define ifr_metric ifr_ifru.ifru_metric /* metric */ 863 #define ifr_mtu ifr_ifru.ifru_mtu /* mtu */ 864 #define ifr_dlt ifr_ifru.ifru_dlt /* data link type (DLT_*) */ 865 #define ifr_value ifr_ifru.ifru_value /* generic value */ 866 #define ifr_media ifr_ifru.ifru_metric /* media options (overload) */ 867 #define ifr_data ifr_ifru.ifru_data /* for use by interface 868 * XXX deprecated 869 */ 870 #define ifr_buf ifr_ifru.ifru_b.b_buf /* new interface ioctls */ 871 #define ifr_buflen ifr_ifru.ifru_b.b_buflen 872 #define ifr_index ifr_ifru.ifru_value /* interface index, BSD */ 873 #define ifr_ifindex ifr_index /* interface index, linux */ 874 }; 875 876 #ifdef _KERNEL 877 #define ifreq_setdstaddr ifreq_setaddr 878 #define ifreq_setbroadaddr ifreq_setaddr 879 #define ifreq_getdstaddr ifreq_getaddr 880 #define ifreq_getbroadaddr ifreq_getaddr 881 882 static __inline const struct sockaddr * 883 /*ARGSUSED*/ 884 ifreq_getaddr(u_long cmd, const struct ifreq *ifr) 885 { 886 return &ifr->ifr_addr; 887 } 888 #endif /* _KERNEL */ 889 890 struct ifcapreq { 891 char ifcr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 892 uint64_t ifcr_capabilities; /* supported capabiliites */ 893 uint64_t ifcr_capenable; /* capabilities enabled */ 894 }; 895 896 struct ifaliasreq { 897 char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 898 struct sockaddr ifra_addr; 899 struct sockaddr ifra_dstaddr; 900 #define ifra_broadaddr ifra_dstaddr 901 struct sockaddr ifra_mask; 902 }; 903 904 struct ifdatareq { 905 char ifdr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 906 struct if_data ifdr_data; 907 }; 908 909 struct ifmediareq { 910 char ifm_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 911 int ifm_current; /* IFMWD: current media options */ 912 int ifm_mask; /* IFMWD: don't care mask */ 913 int ifm_status; /* media status */ 914 int ifm_active; /* IFMWD: active options */ 915 int ifm_count; /* # entries in ifm_ulist 916 array */ 917 int *ifm_ulist; /* array of ifmedia word */ 918 }; 919 920 921 struct ifdrv { 922 char ifd_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 923 unsigned long ifd_cmd; 924 size_t ifd_len; 925 void *ifd_data; 926 }; 927 #define IFLINKSTR_QUERYLEN 0x01 928 #define IFLINKSTR_UNSET 0x02 929 930 /* 931 * Structure used in SIOCGIFCONF request. 932 * Used to retrieve interface configuration 933 * for machine (useful for programs which 934 * must know all networks accessible). 935 */ 936 struct ifconf { 937 int ifc_len; /* size of associated buffer */ 938 union { 939 void * ifcu_buf; 940 struct ifreq *ifcu_req; 941 } ifc_ifcu; 942 #define ifc_buf ifc_ifcu.ifcu_buf /* buffer address */ 943 #define ifc_req ifc_ifcu.ifcu_req /* array of structures returned */ 944 }; 945 946 /* 947 * Structure for SIOC[AGD]LIFADDR 948 */ 949 struct if_laddrreq { 950 char iflr_name[IFNAMSIZ]; 951 unsigned int flags; 952 #define IFLR_PREFIX 0x8000 /* in: prefix given out: kernel fills id */ 953 #define IFLR_ACTIVE 0x4000 /* in/out: link-layer address activation */ 954 #define IFLR_FACTORY 0x2000 /* in/out: factory link-layer address */ 955 unsigned int prefixlen; /* in/out */ 956 struct sockaddr_storage addr; /* in/out */ 957 struct sockaddr_storage dstaddr; /* out */ 958 }; 959 960 /* 961 * Structure for SIOC[SG]IFADDRPREF 962 */ 963 struct if_addrprefreq { 964 char ifap_name[IFNAMSIZ]; 965 int16_t ifap_preference; /* in/out */ 966 struct sockaddr_storage ifap_addr; /* in/out */ 967 }; 968 969 #include <net/if_arp.h> 970 971 #endif /* _NETBSD_SOURCE */ 972 973 #ifdef _KERNEL 974 #ifdef ALTQ 975 #define IFQ_ENQUEUE(ifq, m, err) \ 976 do { \ 977 mutex_enter((ifq)->ifq_lock); \ 978 if (ALTQ_IS_ENABLED(ifq)) \ 979 ALTQ_ENQUEUE((ifq), (m), (err)); \ 980 else { \ 981 if (IF_QFULL(ifq)) { \ 982 m_freem(m); \ 983 (err) = ENOBUFS; \ 984 } else { \ 985 IF_ENQUEUE((ifq), (m)); \ 986 (err) = 0; \ 987 } \ 988 } \ 989 if ((err)) \ 990 (ifq)->ifq_drops++; \ 991 mutex_exit((ifq)->ifq_lock); \ 992 } while (/*CONSTCOND*/ 0) 993 994 #define IFQ_DEQUEUE(ifq, m) \ 995 do { \ 996 mutex_enter((ifq)->ifq_lock); \ 997 if (TBR_IS_ENABLED(ifq)) \ 998 (m) = tbr_dequeue((ifq), ALTDQ_REMOVE); \ 999 else if (ALTQ_IS_ENABLED(ifq)) \ 1000 ALTQ_DEQUEUE((ifq), (m)); \ 1001 else \ 1002 IF_DEQUEUE((ifq), (m)); \ 1003 mutex_exit((ifq)->ifq_lock); \ 1004 } while (/*CONSTCOND*/ 0) 1005 1006 #define IFQ_POLL(ifq, m) \ 1007 do { \ 1008 mutex_enter((ifq)->ifq_lock); \ 1009 if (TBR_IS_ENABLED(ifq)) \ 1010 (m) = tbr_dequeue((ifq), ALTDQ_POLL); \ 1011 else if (ALTQ_IS_ENABLED(ifq)) \ 1012 ALTQ_POLL((ifq), (m)); \ 1013 else \ 1014 IF_POLL((ifq), (m)); \ 1015 mutex_exit((ifq)->ifq_lock); \ 1016 } while (/*CONSTCOND*/ 0) 1017 1018 #define IFQ_PURGE(ifq) \ 1019 do { \ 1020 mutex_enter((ifq)->ifq_lock); \ 1021 if (ALTQ_IS_ENABLED(ifq)) \ 1022 ALTQ_PURGE(ifq); \ 1023 else \ 1024 IF_PURGE(ifq); \ 1025 mutex_exit((ifq)->ifq_lock); \ 1026 } while (/*CONSTCOND*/ 0) 1027 1028 #define IFQ_SET_READY(ifq) \ 1029 do { \ 1030 (ifq)->altq_flags |= ALTQF_READY; \ 1031 } while (/*CONSTCOND*/ 0) 1032 1033 #define IFQ_CLASSIFY(ifq, m, af) \ 1034 do { \ 1035 KASSERT(((m)->m_flags & M_PKTHDR) != 0); \ 1036 mutex_enter((ifq)->ifq_lock); \ 1037 if (ALTQ_IS_ENABLED(ifq)) { \ 1038 if (ALTQ_NEEDS_CLASSIFY(ifq)) \ 1039 (m)->m_pkthdr.pattr_class = (*(ifq)->altq_classify) \ 1040 ((ifq)->altq_clfier, (m), (af)); \ 1041 (m)->m_pkthdr.pattr_af = (af); \ 1042 (m)->m_pkthdr.pattr_hdr = mtod((m), void *); \ 1043 } \ 1044 mutex_exit((ifq)->ifq_lock); \ 1045 } while (/*CONSTCOND*/ 0) 1046 #else /* ! ALTQ */ 1047 #define IFQ_ENQUEUE(ifq, m, err) \ 1048 do { \ 1049 mutex_enter((ifq)->ifq_lock); \ 1050 if (IF_QFULL(ifq)) { \ 1051 m_freem(m); \ 1052 (err) = ENOBUFS; \ 1053 } else { \ 1054 IF_ENQUEUE((ifq), (m)); \ 1055 (err) = 0; \ 1056 } \ 1057 if (err) \ 1058 (ifq)->ifq_drops++; \ 1059 mutex_exit((ifq)->ifq_lock); \ 1060 } while (/*CONSTCOND*/ 0) 1061 1062 #define IFQ_DEQUEUE(ifq, m) \ 1063 do { \ 1064 mutex_enter((ifq)->ifq_lock); \ 1065 IF_DEQUEUE((ifq), (m)); \ 1066 mutex_exit((ifq)->ifq_lock); \ 1067 } while (/*CONSTCOND*/ 0) 1068 1069 #define IFQ_POLL(ifq, m) \ 1070 do { \ 1071 mutex_enter((ifq)->ifq_lock); \ 1072 IF_POLL((ifq), (m)); \ 1073 mutex_exit((ifq)->ifq_lock); \ 1074 } while (/*CONSTCOND*/ 0) 1075 1076 #define IFQ_PURGE(ifq) \ 1077 do { \ 1078 mutex_enter((ifq)->ifq_lock); \ 1079 IF_PURGE(ifq); \ 1080 mutex_exit((ifq)->ifq_lock); \ 1081 } while (/*CONSTCOND*/ 0) 1082 1083 #define IFQ_SET_READY(ifq) /* nothing */ 1084 1085 #define IFQ_CLASSIFY(ifq, m, af) /* nothing */ 1086 1087 #endif /* ALTQ */ 1088 1089 #define IFQ_LOCK_INIT(ifq) (ifq)->ifq_lock = \ 1090 mutex_obj_alloc(MUTEX_DEFAULT, IPL_NET) 1091 #define IFQ_LOCK_DESTROY(ifq) mutex_obj_free((ifq)->ifq_lock) 1092 #define IFQ_LOCK(ifq) mutex_enter((ifq)->ifq_lock) 1093 #define IFQ_UNLOCK(ifq) mutex_exit((ifq)->ifq_lock) 1094 1095 #define IFQ_IS_EMPTY(ifq) IF_IS_EMPTY(ifq) 1096 #define IFQ_INC_LEN(ifq) ((ifq)->ifq_len++) 1097 #define IFQ_DEC_LEN(ifq) (--(ifq)->ifq_len) 1098 #define IFQ_INC_DROPS(ifq) ((ifq)->ifq_drops++) 1099 #define IFQ_SET_MAXLEN(ifq, len) ((ifq)->ifq_maxlen = (len)) 1100 1101 #include <sys/mallocvar.h> 1102 MALLOC_DECLARE(M_IFADDR); 1103 MALLOC_DECLARE(M_IFMADDR); 1104 1105 int ifreq_setaddr(u_long, struct ifreq *, const struct sockaddr *); 1106 1107 struct ifnet *if_alloc(u_char); 1108 void if_free(struct ifnet *); 1109 void if_initname(struct ifnet *, const char *, int); 1110 struct ifaddr *if_dl_create(const struct ifnet *, const struct sockaddr_dl **); 1111 void if_activate_sadl(struct ifnet *, struct ifaddr *, 1112 const struct sockaddr_dl *); 1113 void if_set_sadl(struct ifnet *, const void *, u_char, bool); 1114 void if_alloc_sadl(struct ifnet *); 1115 void if_free_sadl(struct ifnet *, int); 1116 int if_initialize(struct ifnet *); 1117 void if_register(struct ifnet *); 1118 int if_attach(struct ifnet *); /* Deprecated. Use if_initialize and if_register */ 1119 void if_attachdomain(void); 1120 void if_deactivate(struct ifnet *); 1121 bool if_is_deactivated(const struct ifnet *); 1122 void if_export_if_data(struct ifnet *, struct if_data *, bool); 1123 void if_purgeaddrs(struct ifnet *, int, void (*)(struct ifaddr *)); 1124 void if_detach(struct ifnet *); 1125 void if_down(struct ifnet *); 1126 void if_down_locked(struct ifnet *); 1127 void if_link_state_change(struct ifnet *, int); 1128 void if_link_state_change_softint(struct ifnet *, int); 1129 void if_up(struct ifnet *); 1130 void ifinit(void); 1131 void ifinit1(void); 1132 void ifinit_post(void); 1133 int ifaddrpref_ioctl(struct socket *, u_long, void *, struct ifnet *); 1134 extern int (*ifioctl)(struct socket *, u_long, void *, struct lwp *); 1135 int ifioctl_common(struct ifnet *, u_long, void *); 1136 int ifpromisc(struct ifnet *, int); 1137 int ifpromisc_locked(struct ifnet *, int); 1138 int if_addr_init(ifnet_t *, struct ifaddr *, bool); 1139 int if_do_dad(struct ifnet *); 1140 int if_mcast_op(ifnet_t *, const unsigned long, const struct sockaddr *); 1141 int if_flags_set(struct ifnet *, const u_short); 1142 int if_clone_list(int, char *, int *); 1143 1144 struct ifnet *ifunit(const char *); 1145 struct ifnet *if_get(const char *, struct psref *); 1146 ifnet_t *if_byindex(u_int); 1147 ifnet_t *_if_byindex(u_int); 1148 ifnet_t *if_get_byindex(u_int, struct psref *); 1149 ifnet_t *if_get_bylla(const void *, unsigned char, struct psref *); 1150 void if_put(const struct ifnet *, struct psref *); 1151 void if_acquire(struct ifnet *, struct psref *); 1152 #define if_release if_put 1153 1154 int if_tunnel_check_nesting(struct ifnet *, struct mbuf *, int); 1155 percpu_t *if_tunnel_alloc_ro_percpu(void); 1156 void if_tunnel_free_ro_percpu(percpu_t *); 1157 void if_tunnel_ro_percpu_rtcache_free(percpu_t *); 1158 1159 struct tunnel_ro { 1160 struct route *tr_ro; 1161 kmutex_t *tr_lock; 1162 }; 1163 1164 static inline void 1165 if_tunnel_get_ro(percpu_t *ro_percpu, struct route **ro, kmutex_t **lock) 1166 { 1167 struct tunnel_ro *tro; 1168 1169 tro = percpu_getref(ro_percpu); 1170 *ro = tro->tr_ro; 1171 *lock = tro->tr_lock; 1172 mutex_enter(*lock); 1173 } 1174 1175 static inline void 1176 if_tunnel_put_ro(percpu_t *ro_percpu, kmutex_t *lock) 1177 { 1178 1179 mutex_exit(lock); 1180 percpu_putref(ro_percpu); 1181 } 1182 1183 static __inline if_index_t 1184 if_get_index(const struct ifnet *ifp) 1185 { 1186 1187 return ifp != NULL ? ifp->if_index : 0; 1188 } 1189 1190 bool if_held(struct ifnet *); 1191 1192 void if_input(struct ifnet *, struct mbuf *); 1193 1194 struct if_percpuq * 1195 if_percpuq_create(struct ifnet *); 1196 void if_percpuq_destroy(struct if_percpuq *); 1197 void 1198 if_percpuq_enqueue(struct if_percpuq *, struct mbuf *); 1199 1200 void if_deferred_start_init(struct ifnet *, void (*)(struct ifnet *)); 1201 void if_schedule_deferred_start(struct ifnet *); 1202 1203 void ifa_insert(struct ifnet *, struct ifaddr *); 1204 void ifa_remove(struct ifnet *, struct ifaddr *); 1205 1206 void ifa_psref_init(struct ifaddr *); 1207 void ifa_acquire(struct ifaddr *, struct psref *); 1208 void ifa_release(struct ifaddr *, struct psref *); 1209 bool ifa_held(struct ifaddr *); 1210 bool ifa_is_destroying(struct ifaddr *); 1211 1212 void ifaref(struct ifaddr *); 1213 void ifafree(struct ifaddr *); 1214 1215 struct ifaddr *ifa_ifwithaddr(const struct sockaddr *); 1216 struct ifaddr *ifa_ifwithaddr_psref(const struct sockaddr *, struct psref *); 1217 struct ifaddr *ifa_ifwithaf(int); 1218 struct ifaddr *ifa_ifwithdstaddr(const struct sockaddr *); 1219 struct ifaddr *ifa_ifwithdstaddr_psref(const struct sockaddr *, 1220 struct psref *); 1221 struct ifaddr *ifa_ifwithnet(const struct sockaddr *); 1222 struct ifaddr *ifa_ifwithnet_psref(const struct sockaddr *, struct psref *); 1223 struct ifaddr *ifa_ifwithladdr(const struct sockaddr *); 1224 struct ifaddr *ifa_ifwithladdr_psref(const struct sockaddr *, struct psref *); 1225 struct ifaddr *ifaof_ifpforaddr(const struct sockaddr *, struct ifnet *); 1226 struct ifaddr *ifaof_ifpforaddr_psref(const struct sockaddr *, struct ifnet *, 1227 struct psref *); 1228 void link_rtrequest(int, struct rtentry *, const struct rt_addrinfo *); 1229 void p2p_rtrequest(int, struct rtentry *, const struct rt_addrinfo *); 1230 1231 void if_clone_attach(struct if_clone *); 1232 void if_clone_detach(struct if_clone *); 1233 1234 int if_transmit_lock(struct ifnet *, struct mbuf *); 1235 1236 int ifq_enqueue(struct ifnet *, struct mbuf *); 1237 int ifq_enqueue2(struct ifnet *, struct ifqueue *, struct mbuf *); 1238 1239 int loioctl(struct ifnet *, u_long, void *); 1240 void loopattach(int); 1241 void loopinit(void); 1242 int looutput(struct ifnet *, 1243 struct mbuf *, const struct sockaddr *, const struct rtentry *); 1244 1245 /* 1246 * These are exported because they're an easy way to tell if 1247 * an interface is going away without having to burn a flag. 1248 */ 1249 int if_nulloutput(struct ifnet *, struct mbuf *, 1250 const struct sockaddr *, const struct rtentry *); 1251 void if_nullinput(struct ifnet *, struct mbuf *); 1252 void if_nullstart(struct ifnet *); 1253 int if_nulltransmit(struct ifnet *, struct mbuf *); 1254 int if_nullioctl(struct ifnet *, u_long, void *); 1255 int if_nullinit(struct ifnet *); 1256 void if_nullstop(struct ifnet *, int); 1257 void if_nullslowtimo(struct ifnet *); 1258 #define if_nullwatchdog if_nullslowtimo 1259 void if_nulldrain(struct ifnet *); 1260 #else 1261 struct if_nameindex { 1262 unsigned int if_index; /* 1, 2, ... */ 1263 char *if_name; /* null terminated name: "le0", ... */ 1264 }; 1265 1266 #include <sys/cdefs.h> 1267 __BEGIN_DECLS 1268 unsigned int if_nametoindex(const char *); 1269 char * if_indextoname(unsigned int, char *); 1270 struct if_nameindex * if_nameindex(void); 1271 void if_freenameindex(struct if_nameindex *); 1272 __END_DECLS 1273 #endif /* _KERNEL */ /* XXX really ALTQ? */ 1274 1275 #ifdef _KERNEL 1276 1277 #define IFADDR_FIRST(__ifp) TAILQ_FIRST(&(__ifp)->if_addrlist) 1278 #define IFADDR_NEXT(__ifa) TAILQ_NEXT((__ifa), ifa_list) 1279 #define IFADDR_FOREACH(__ifa, __ifp) TAILQ_FOREACH(__ifa, \ 1280 &(__ifp)->if_addrlist, ifa_list) 1281 #define IFADDR_FOREACH_SAFE(__ifa, __ifp, __nifa) \ 1282 TAILQ_FOREACH_SAFE(__ifa, \ 1283 &(__ifp)->if_addrlist, ifa_list, __nifa) 1284 #define IFADDR_EMPTY(__ifp) TAILQ_EMPTY(&(__ifp)->if_addrlist) 1285 1286 #define IFADDR_ENTRY_INIT(__ifa) \ 1287 PSLIST_ENTRY_INIT((__ifa), ifa_pslist_entry) 1288 #define IFADDR_ENTRY_DESTROY(__ifa) \ 1289 PSLIST_ENTRY_DESTROY((__ifa), ifa_pslist_entry) 1290 #define IFADDR_READER_EMPTY(__ifp) \ 1291 (PSLIST_READER_FIRST(&(__ifp)->if_addr_pslist, struct ifaddr, \ 1292 ifa_pslist_entry) == NULL) 1293 #define IFADDR_READER_FIRST(__ifp) \ 1294 PSLIST_READER_FIRST(&(__ifp)->if_addr_pslist, struct ifaddr, \ 1295 ifa_pslist_entry) 1296 #define IFADDR_READER_NEXT(__ifa) \ 1297 PSLIST_READER_NEXT((__ifa), struct ifaddr, ifa_pslist_entry) 1298 #define IFADDR_READER_FOREACH(__ifa, __ifp) \ 1299 PSLIST_READER_FOREACH((__ifa), &(__ifp)->if_addr_pslist, struct ifaddr,\ 1300 ifa_pslist_entry) 1301 #define IFADDR_WRITER_INSERT_HEAD(__ifp, __ifa) \ 1302 PSLIST_WRITER_INSERT_HEAD(&(__ifp)->if_addr_pslist, (__ifa), \ 1303 ifa_pslist_entry) 1304 #define IFADDR_WRITER_REMOVE(__ifa) \ 1305 PSLIST_WRITER_REMOVE((__ifa), ifa_pslist_entry) 1306 #define IFADDR_WRITER_FOREACH(__ifa, __ifp) \ 1307 PSLIST_WRITER_FOREACH((__ifa), &(__ifp)->if_addr_pslist, struct ifaddr,\ 1308 ifa_pslist_entry) 1309 #define IFADDR_WRITER_NEXT(__ifp) \ 1310 PSLIST_WRITER_NEXT((__ifp), struct ifaddr, ifa_pslist_entry) 1311 #define IFADDR_WRITER_INSERT_AFTER(__ifp, __new) \ 1312 PSLIST_WRITER_INSERT_AFTER((__ifp), (__new), ifa_pslist_entry) 1313 #define IFADDR_WRITER_EMPTY(__ifp) \ 1314 (PSLIST_WRITER_FIRST(&(__ifp)->if_addr_pslist, struct ifaddr, \ 1315 ifa_pslist_entry) == NULL) 1316 #define IFADDR_WRITER_INSERT_TAIL(__ifp, __new) \ 1317 do { \ 1318 if (IFADDR_WRITER_EMPTY(__ifp)) { \ 1319 IFADDR_WRITER_INSERT_HEAD((__ifp), (__new)); \ 1320 } else { \ 1321 struct ifaddr *__ifa; \ 1322 IFADDR_WRITER_FOREACH(__ifa, (__ifp)) { \ 1323 if (IFADDR_WRITER_NEXT(__ifa) == NULL) {\ 1324 IFADDR_WRITER_INSERT_AFTER(__ifa,\ 1325 (__new)); \ 1326 break; \ 1327 } \ 1328 } \ 1329 } \ 1330 } while (0) 1331 1332 #define IFNET_GLOBAL_LOCK() mutex_enter(&ifnet_mtx) 1333 #define IFNET_GLOBAL_UNLOCK() mutex_exit(&ifnet_mtx) 1334 #define IFNET_GLOBAL_LOCKED() mutex_owned(&ifnet_mtx) 1335 1336 #define IFNET_READER_EMPTY() \ 1337 (PSLIST_READER_FIRST(&ifnet_pslist, struct ifnet, if_pslist_entry) == NULL) 1338 #define IFNET_READER_FIRST() \ 1339 PSLIST_READER_FIRST(&ifnet_pslist, struct ifnet, if_pslist_entry) 1340 #define IFNET_READER_NEXT(__ifp) \ 1341 PSLIST_READER_NEXT((__ifp), struct ifnet, if_pslist_entry) 1342 #define IFNET_READER_FOREACH(__ifp) \ 1343 PSLIST_READER_FOREACH((__ifp), &ifnet_pslist, struct ifnet, \ 1344 if_pslist_entry) 1345 #define IFNET_WRITER_INSERT_HEAD(__ifp) \ 1346 PSLIST_WRITER_INSERT_HEAD(&ifnet_pslist, (__ifp), if_pslist_entry) 1347 #define IFNET_WRITER_REMOVE(__ifp) \ 1348 PSLIST_WRITER_REMOVE((__ifp), if_pslist_entry) 1349 #define IFNET_WRITER_FOREACH(__ifp) \ 1350 PSLIST_WRITER_FOREACH((__ifp), &ifnet_pslist, struct ifnet, \ 1351 if_pslist_entry) 1352 #define IFNET_WRITER_NEXT(__ifp) \ 1353 PSLIST_WRITER_NEXT((__ifp), struct ifnet, if_pslist_entry) 1354 #define IFNET_WRITER_INSERT_AFTER(__ifp, __new) \ 1355 PSLIST_WRITER_INSERT_AFTER((__ifp), (__new), if_pslist_entry) 1356 #define IFNET_WRITER_EMPTY() \ 1357 (PSLIST_WRITER_FIRST(&ifnet_pslist, struct ifnet, if_pslist_entry) == NULL) 1358 #define IFNET_WRITER_INSERT_TAIL(__new) \ 1359 do { \ 1360 if (IFNET_WRITER_EMPTY()) { \ 1361 IFNET_WRITER_INSERT_HEAD(__new); \ 1362 } else { \ 1363 struct ifnet *__ifp; \ 1364 IFNET_WRITER_FOREACH(__ifp) { \ 1365 if (IFNET_WRITER_NEXT(__ifp) == NULL) { \ 1366 IFNET_WRITER_INSERT_AFTER(__ifp,\ 1367 (__new)); \ 1368 break; \ 1369 } \ 1370 } \ 1371 } \ 1372 } while (0) 1373 1374 #define IFNET_LOCK(ifp) mutex_enter((ifp)->if_ioctl_lock) 1375 #define IFNET_UNLOCK(ifp) mutex_exit((ifp)->if_ioctl_lock) 1376 #define IFNET_LOCKED(ifp) mutex_owned((ifp)->if_ioctl_lock) 1377 1378 #define IFNET_ASSERT_UNLOCKED(ifp) \ 1379 KDASSERT(mutex_ownable((ifp)->if_ioctl_lock)) 1380 1381 extern struct pslist_head ifnet_pslist; 1382 extern kmutex_t ifnet_mtx; 1383 1384 extern struct ifnet *lo0ifp; 1385 1386 /* 1387 * ifq sysctl support 1388 */ 1389 int sysctl_ifq(int *name, u_int namelen, void *oldp, 1390 size_t *oldlenp, void *newp, size_t newlen, 1391 struct ifqueue *ifq); 1392 /* symbolic names for terminal (per-protocol) CTL_IFQ_ nodes */ 1393 #define IFQCTL_LEN 1 1394 #define IFQCTL_MAXLEN 2 1395 #define IFQCTL_PEAK 3 1396 #define IFQCTL_DROPS 4 1397 1398 /* 1399 * Hook for if_vlan - needed by if_agr 1400 */ 1401 MODULE_HOOK(if_vlan_vlan_input_hook, void, (struct ifnet *, struct mbuf *)); 1402 1403 #endif /* _KERNEL */ 1404 1405 #endif /* !_NET_IF_H_ */ 1406
Indexes created Fri Sep 26 20:09:58 GMT 2025