if.h revision 1.281
1 /* $NetBSD: if.h,v 1.281 2020/02/06 23:30:19 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 #include <sys/workqueue.h> 233 234 #endif /* _KERNEL */ 235 236 /* 237 * Structure defining a queue for a network interface. 238 * 239 * (Would like to call this struct ``if'', but C isn't PL/1.) 240 */ 241 TAILQ_HEAD(ifnet_head, ifnet); /* the actual queue head */ 242 243 struct bridge_softc; 244 struct bridge_iflist; 245 struct callout; 246 struct krwlock; 247 struct if_percpuq; 248 struct if_deferred_start; 249 struct in6_multi; 250 251 typedef unsigned short if_index_t; 252 253 /* 254 * Interface. Field markings and the corresponding locks: 255 * 256 * i: IFNET_LOCK (a.k.a., if_ioctl_lock) 257 * q: ifq_lock (struct ifaltq) 258 * a: if_afdata_lock 259 * 6: in6_multilock (global lock) 260 * :: unlocked, stable 261 * ?: unknown, maybe unsafe 262 * 263 * Lock order: IFNET_LOCK => in6_multilock => if_afdata_lock => ifq_lock 264 * Note that currently if_afdata_lock and ifq_lock aren't held 265 * at the same time, but define the order anyway. 266 * 267 * Lock order of IFNET_LOCK with other locks: 268 * softnet_lock => solock => IFNET_LOCK => ND6_LOCK, in_multilock 269 */ 270 typedef struct ifnet { 271 void *if_softc; /* :: lower-level data for this if */ 272 /* DEPRECATED. Keep it to avoid breaking kvm(3) users */ 273 TAILQ_ENTRY(ifnet) 274 if_list; /* i: all struct ifnets are chained */ 275 TAILQ_HEAD(, ifaddr) 276 if_addrlist; /* i: linked list of addresses per if */ 277 char if_xname[IFNAMSIZ]; 278 /* :: external name (name + unit) */ 279 int if_pcount; /* i: number of promiscuous listeners */ 280 struct bpf_if *if_bpf; /* :: packet filter structure */ 281 if_index_t if_index; /* :: numeric abbreviation for this if */ 282 short if_timer; /* ?: time 'til if_slowtimo called */ 283 unsigned short if_flags; /* i: up/down, broadcast, etc. */ 284 short if_extflags; /* :: if_output MP-safe, etc. */ 285 #ifdef __IF_STATS_PERCPU 286 u_char if_type; /* :: ethernet, tokenring, etc. */ 287 u_char if_addrlen; /* :: media address length */ 288 u_char if_hdrlen; /* :: media header length */ 289 /* XXX audit :? fields here. */ 290 int if_link_state; /* :? current link state */ 291 uint64_t if_mtu; /* :? maximum transmission unit */ 292 uint64_t if_metric; /* :? routing metric (external only) */ 293 uint64_t if_baudrate; /* :? linespeed */ 294 struct timespec if_lastchange; /* :? last operational state change */ 295 #ifdef _KERNEL 296 percpu_t *if_stats; /* :: statistics */ 297 #else 298 void *if_stats; /* opaque to user-space */ 299 #endif /* _KERNEL */ 300 #else /* ! __IF_STATS_PERCPU */ 301 struct if_data if_data; /* ?: statistics and other data */ 302 #endif /* __IF_STATS_PERCPU */ 303 /* 304 * Procedure handles. If you add more of these, don't forget the 305 * corresponding NULL stub in if.c. 306 */ 307 int (*if_output) /* :: output routine (enqueue) */ 308 (struct ifnet *, struct mbuf *, const struct sockaddr *, 309 const struct rtentry *); 310 void (*_if_input) /* :: input routine (from h/w driver) */ 311 (struct ifnet *, struct mbuf *); 312 void (*if_start) /* :: initiate output routine */ 313 (struct ifnet *); 314 int (*if_transmit) /* :: output routine, must be MP-safe */ 315 (struct ifnet *, struct mbuf *); 316 int (*if_ioctl) /* :: ioctl routine */ 317 (struct ifnet *, u_long, void *); 318 int (*if_init) /* :: init routine */ 319 (struct ifnet *); 320 void (*if_stop) /* :: stop routine */ 321 (struct ifnet *, int); 322 void (*if_slowtimo) /* :: timer routine */ 323 (struct ifnet *); 324 #define if_watchdog if_slowtimo 325 void (*if_drain) /* :: routine to release resources */ 326 (struct ifnet *); 327 struct ifaltq if_snd; /* q: output queue (includes altq) */ 328 struct ifaddr *if_dl; /* i: identity of this interface. */ 329 const struct sockaddr_dl 330 *if_sadl; /* i: pointer to sockaddr_dl of if_dl */ 331 /* 332 * May be NULL. If not NULL, it is the address assigned 333 * to the interface by the manufacturer, so it very likely 334 * to be unique. It MUST NOT be deleted. It is highly 335 * suitable for deriving the EUI64 for the interface. 336 */ 337 struct ifaddr *if_hwdl; /* i: h/w identity */ 338 const uint8_t *if_broadcastaddr; 339 /* :: linklevel broadcast bytestring */ 340 struct bridge_softc 341 *if_bridge; /* i: bridge glue */ 342 struct bridge_iflist 343 *if_bridgeif; /* i: shortcut to interface list entry */ 344 int if_dlt; /* :: data link type (<net/dlt.h>) */ 345 pfil_head_t * if_pfil; /* :: filtering point */ 346 uint64_t if_capabilities; 347 /* i: interface capabilities */ 348 uint64_t if_capenable; /* i: capabilities enabled */ 349 union { 350 void * carp_s; /* carp structure (used by !carp ifs) */ 351 struct ifnet *carp_d;/* ptr to carpdev (used by carp ifs) */ 352 } if_carp_ptr; /* ?: */ 353 #define if_carp if_carp_ptr.carp_s 354 #define if_carpdev if_carp_ptr.carp_d 355 /* 356 * These are pre-computed based on an interfaces enabled 357 * capabilities, for speed elsewhere. 358 */ 359 int if_csum_flags_tx; 360 /* i: M_CSUM_* flags for Tx */ 361 int if_csum_flags_rx; 362 /* i: M_CSUM_* flags for Rx */ 363 364 void *if_afdata[AF_MAX]; 365 /* a: */ 366 struct mowner *if_mowner; /* ?: who owns mbufs for this interface */ 367 368 void *if_agrprivate; /* ?: used only when #if NAGR > 0 */ 369 void *if_npf_private;/* ?: associated NPF context */ 370 371 /* 372 * pf specific data, used only when #if NPF > 0. 373 */ 374 void *if_pf_kif; /* ?: pf interface abstraction */ 375 void *if_pf_groups; /* ?: pf interface groups */ 376 /* 377 * During an ifnet's lifetime, it has only one if_index, but 378 * and if_index is not sufficient to identify an ifnet 379 * because during the lifetime of the system, many ifnets may occupy a 380 * given if_index. Let us tell different ifnets at the same 381 * if_index apart by their if_index_gen, a unique number that each ifnet 382 * is assigned when it if_attach()s. Now, the kernel can use the 383 * pair (if_index, if_index_gen) as a weak reference to an ifnet. 384 */ 385 uint64_t if_index_gen; /* :: generation number for the ifnet 386 * at if_index: if two ifnets' index 387 * and generation number are both the 388 * same, they are the same ifnet. 389 */ 390 struct sysctllog 391 *if_sysctl_log; /* :: */ 392 int (*if_initaddr) /* :: */ 393 (struct ifnet *, struct ifaddr *, bool); 394 int (*if_mcastop) /* :: */ 395 (struct ifnet *, const unsigned long, 396 const struct sockaddr *); 397 int (*if_setflags) /* :: */ 398 (struct ifnet *, const u_short); 399 kmutex_t *if_ioctl_lock; /* :: */ 400 char *if_description; /* i: interface description */ 401 #ifdef _KERNEL /* XXX kvm(3) */ 402 struct callout *if_slowtimo_ch;/* :: */ 403 struct krwlock *if_afdata_lock;/* :: */ 404 struct if_percpuq 405 *if_percpuq; /* :: we should remove it in the future */ 406 struct work if_link_work; /* q: linkage on link state work queue */ 407 uint16_t if_link_queue; /* q: masked link state change queue */ 408 /* q: is link state work scheduled? */ 409 bool if_link_scheduled; 410 /* q: can link state work be scheduled? */ 411 bool if_link_cansched; 412 struct pslist_entry 413 if_pslist_entry;/* i: */ 414 struct psref_target 415 if_psref; /* :: */ 416 struct pslist_head 417 if_addr_pslist; /* i: */ 418 struct if_deferred_start 419 *if_deferred_start; 420 /* :: */ 421 /* XXX should be protocol independent */ 422 LIST_HEAD(, in6_multi) 423 if_multiaddrs; /* 6: */ 424 #endif 425 } ifnet_t; 426 427 #include <net/if_stats.h> 428 429 #ifndef __IF_STATS_PERCPU 430 #define if_mtu if_data.ifi_mtu 431 #define if_type if_data.ifi_type 432 #define if_addrlen if_data.ifi_addrlen 433 #define if_hdrlen if_data.ifi_hdrlen 434 #define if_metric if_data.ifi_metric 435 #define if_link_state if_data.ifi_link_state 436 #define if_baudrate if_data.ifi_baudrate 437 #define if_ipackets if_data.ifi_ipackets 438 #define if_ierrors if_data.ifi_ierrors 439 #define if_opackets if_data.ifi_opackets 440 #define if_oerrors if_data.ifi_oerrors 441 #define if_collisions if_data.ifi_collisions 442 #define if_ibytes if_data.ifi_ibytes 443 #define if_obytes if_data.ifi_obytes 444 #define if_imcasts if_data.ifi_imcasts 445 #define if_omcasts if_data.ifi_omcasts 446 #define if_iqdrops if_data.ifi_iqdrops 447 #define if_noproto if_data.ifi_noproto 448 #define if_lastchange if_data.ifi_lastchange 449 #endif /* __IF_STATS_PERCPU */ 450 #define if_name(ifp) ((ifp)->if_xname) 451 452 #define IFF_UP 0x0001 /* interface is up */ 453 #define IFF_BROADCAST 0x0002 /* broadcast address valid */ 454 #define IFF_DEBUG 0x0004 /* turn on debugging */ 455 #define IFF_LOOPBACK 0x0008 /* is a loopback net */ 456 #define IFF_POINTOPOINT 0x0010 /* interface is point-to-point link */ 457 /* 0x0020 was IFF_NOTRAILERS */ 458 #define IFF_RUNNING 0x0040 /* resources allocated */ 459 #define IFF_NOARP 0x0080 /* no address resolution protocol */ 460 #define IFF_PROMISC 0x0100 /* receive all packets */ 461 #define IFF_ALLMULTI 0x0200 /* receive all multicast packets */ 462 #define IFF_OACTIVE 0x0400 /* transmission in progress */ 463 #define IFF_SIMPLEX 0x0800 /* can't hear own transmissions */ 464 #define IFF_LINK0 0x1000 /* per link layer defined bit */ 465 #define IFF_LINK1 0x2000 /* per link layer defined bit */ 466 #define IFF_LINK2 0x4000 /* per link layer defined bit */ 467 #define IFF_MULTICAST 0x8000 /* supports multicast */ 468 469 #define IFEF_MPSAFE __BIT(0) /* handlers can run in parallel (see below) */ 470 #define IFEF_NO_LINK_STATE_CHANGE __BIT(1) /* doesn't use link state interrupts */ 471 472 /* 473 * The guidelines for converting an interface to IFEF_MPSAFE are as follows 474 * 475 * Enabling IFEF_MPSAFE on an interface suppresses taking KERNEL_LOCK when 476 * calling the following handlers: 477 * - if_start 478 * - Note that if_transmit is always called without KERNEL_LOCK 479 * - if_output 480 * - if_ioctl 481 * - if_init 482 * - if_stop 483 * 484 * This means that an interface with IFEF_MPSAFE must make the above handlers 485 * MP-safe or take KERNEL_LOCK by itself inside handlers that aren't MP-safe 486 * yet. 487 * 488 * There are some additional restrictions to access member variables of struct 489 * ifnet: 490 * - if_flags 491 * - Must be updated with holding IFNET_LOCK 492 * - You cannot use the flag in Tx/Rx paths anymore because there is no 493 * synchronization on the flag except for IFNET_LOCK 494 * - Note that IFNET_LOCK can't be taken in softint because it's known 495 * that it causes a deadlock 496 * - Some synchronization mechanisms such as pserialize_perform are called 497 * with IFNET_LOCK and also require context switches on every CPUs 498 * that mean softints finish so trying to take IFNET_LOCK in softint 499 * might block on IFNET_LOCK and prevent such synchronization mechanisms 500 * from being completed 501 * - Currently the deadlock occurs only if NET_MPSAFE is enabled, however, 502 * we should deal with the restriction because NET_MPSAFE will be enabled 503 * by default in the future 504 * - if_watchdog and if_timer 505 * - The watchdog framework works only for non-IFEF_MPSAFE interfaces 506 * that rely on KERNEL_LOCK 507 * - Interfaces with IFEF_MPSAFE have to provide its own watchdog mechanism 508 * if needed 509 * - Keep if_watchdog NULL when calling if_attach 510 */ 511 512 #ifdef _KERNEL 513 static __inline bool 514 if_is_mpsafe(struct ifnet *ifp) 515 { 516 517 return ((ifp->if_extflags & IFEF_MPSAFE) != 0); 518 } 519 520 static __inline int 521 if_output_lock(struct ifnet *cifp, struct ifnet *ifp, struct mbuf *m, 522 const struct sockaddr *dst, const struct rtentry *rt) 523 { 524 525 if (if_is_mpsafe(cifp)) { 526 return (*cifp->if_output)(ifp, m, dst, rt); 527 } else { 528 int ret; 529 530 KERNEL_LOCK(1, NULL); 531 ret = (*cifp->if_output)(ifp, m, dst, rt); 532 KERNEL_UNLOCK_ONE(NULL); 533 return ret; 534 } 535 } 536 537 static __inline void 538 if_start_lock(struct ifnet *ifp) 539 { 540 541 if (if_is_mpsafe(ifp)) { 542 (*ifp->if_start)(ifp); 543 } else { 544 KERNEL_LOCK(1, NULL); 545 (*ifp->if_start)(ifp); 546 KERNEL_UNLOCK_ONE(NULL); 547 } 548 } 549 550 static __inline bool 551 if_is_link_state_changeable(struct ifnet *ifp) 552 { 553 554 return ((ifp->if_extflags & IFEF_NO_LINK_STATE_CHANGE) == 0); 555 } 556 557 #define KERNEL_LOCK_IF_IFP_MPSAFE(ifp) \ 558 do { if (if_is_mpsafe(ifp)) { KERNEL_LOCK(1, NULL); } } while (0) 559 #define KERNEL_UNLOCK_IF_IFP_MPSAFE(ifp) \ 560 do { if (if_is_mpsafe(ifp)) { KERNEL_UNLOCK_ONE(NULL); } } while (0) 561 562 #define KERNEL_LOCK_UNLESS_IFP_MPSAFE(ifp) \ 563 do { if (!if_is_mpsafe(ifp)) { KERNEL_LOCK(1, NULL); } } while (0) 564 #define KERNEL_UNLOCK_UNLESS_IFP_MPSAFE(ifp) \ 565 do { if (!if_is_mpsafe(ifp)) { KERNEL_UNLOCK_ONE(NULL); } } while (0) 566 567 #ifdef _KERNEL_OPT 568 #include "opt_net_mpsafe.h" 569 #endif 570 571 /* XXX explore a better place to define */ 572 #ifdef NET_MPSAFE 573 574 #define KERNEL_LOCK_UNLESS_NET_MPSAFE() do { } while (0) 575 #define KERNEL_UNLOCK_UNLESS_NET_MPSAFE() do { } while (0) 576 577 #define SOFTNET_LOCK_UNLESS_NET_MPSAFE() do { } while (0) 578 #define SOFTNET_UNLOCK_UNLESS_NET_MPSAFE() do { } while (0) 579 580 #define SOFTNET_LOCK_IF_NET_MPSAFE() \ 581 do { mutex_enter(softnet_lock); } while (0) 582 #define SOFTNET_UNLOCK_IF_NET_MPSAFE() \ 583 do { mutex_exit(softnet_lock); } while (0) 584 585 #else /* NET_MPSAFE */ 586 587 #define KERNEL_LOCK_UNLESS_NET_MPSAFE() \ 588 do { KERNEL_LOCK(1, NULL); } while (0) 589 #define KERNEL_UNLOCK_UNLESS_NET_MPSAFE() \ 590 do { KERNEL_UNLOCK_ONE(NULL); } while (0) 591 592 #define SOFTNET_LOCK_UNLESS_NET_MPSAFE() \ 593 do { mutex_enter(softnet_lock); } while (0) 594 #define SOFTNET_UNLOCK_UNLESS_NET_MPSAFE() \ 595 do { mutex_exit(softnet_lock); } while (0) 596 597 #define SOFTNET_LOCK_IF_NET_MPSAFE() do { } while (0) 598 #define SOFTNET_UNLOCK_IF_NET_MPSAFE() do { } while (0) 599 600 #endif /* NET_MPSAFE */ 601 602 #define SOFTNET_KERNEL_LOCK_UNLESS_NET_MPSAFE() \ 603 do { \ 604 SOFTNET_LOCK_UNLESS_NET_MPSAFE(); \ 605 KERNEL_LOCK_UNLESS_NET_MPSAFE(); \ 606 } while (0) 607 608 #define SOFTNET_KERNEL_UNLOCK_UNLESS_NET_MPSAFE() \ 609 do { \ 610 KERNEL_UNLOCK_UNLESS_NET_MPSAFE(); \ 611 SOFTNET_UNLOCK_UNLESS_NET_MPSAFE(); \ 612 } while (0) 613 614 #endif /* _KERNEL */ 615 616 #define IFFBITS \ 617 "\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT" \ 618 "\7RUNNING\10NOARP\11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX" \ 619 "\15LINK0\16LINK1\17LINK2\20MULTICAST" 620 621 /* flags set internally only: */ 622 #define IFF_CANTCHANGE \ 623 (IFF_BROADCAST|IFF_POINTOPOINT|IFF_RUNNING|IFF_OACTIVE|\ 624 IFF_SIMPLEX|IFF_MULTICAST|IFF_ALLMULTI|IFF_PROMISC) 625 626 /* 627 * Some convenience macros used for setting ifi_baudrate. 628 */ 629 #define IF_Kbps(x) ((x) * 1000ULL) /* kilobits/sec. */ 630 #define IF_Mbps(x) (IF_Kbps((x) * 1000ULL)) /* megabits/sec. */ 631 #define IF_Gbps(x) (IF_Mbps((x) * 1000ULL)) /* gigabits/sec. */ 632 633 /* Capabilities that interfaces can advertise. */ 634 /* 0x01 .. 0x40 were previously used */ 635 #define IFCAP_TSOv4 0x00080 /* can do TCPv4 segmentation offload */ 636 #define IFCAP_CSUM_IPv4_Rx 0x00100 /* can do IPv4 header checksums (Rx) */ 637 #define IFCAP_CSUM_IPv4_Tx 0x00200 /* can do IPv4 header checksums (Tx) */ 638 #define IFCAP_CSUM_TCPv4_Rx 0x00400 /* can do IPv4/TCP checksums (Rx) */ 639 #define IFCAP_CSUM_TCPv4_Tx 0x00800 /* can do IPv4/TCP checksums (Tx) */ 640 #define IFCAP_CSUM_UDPv4_Rx 0x01000 /* can do IPv4/UDP checksums (Rx) */ 641 #define IFCAP_CSUM_UDPv4_Tx 0x02000 /* can do IPv4/UDP checksums (Tx) */ 642 #define IFCAP_CSUM_TCPv6_Rx 0x04000 /* can do IPv6/TCP checksums (Rx) */ 643 #define IFCAP_CSUM_TCPv6_Tx 0x08000 /* can do IPv6/TCP checksums (Tx) */ 644 #define IFCAP_CSUM_UDPv6_Rx 0x10000 /* can do IPv6/UDP checksums (Rx) */ 645 #define IFCAP_CSUM_UDPv6_Tx 0x20000 /* can do IPv6/UDP checksums (Tx) */ 646 #define IFCAP_TSOv6 0x40000 /* can do TCPv6 segmentation offload */ 647 #define IFCAP_LRO 0x80000 /* can do Large Receive Offload */ 648 #define IFCAP_MASK 0xfff80 /* currently valid capabilities */ 649 650 #define IFCAPBITS \ 651 "\020" \ 652 "\10TSO4" \ 653 "\11IP4CSUM_Rx" \ 654 "\12IP4CSUM_Tx" \ 655 "\13TCP4CSUM_Rx" \ 656 "\14TCP4CSUM_Tx" \ 657 "\15UDP4CSUM_Rx" \ 658 "\16UDP4CSUM_Tx" \ 659 "\17TCP6CSUM_Rx" \ 660 "\20TCP6CSUM_Tx" \ 661 "\21UDP6CSUM_Rx" \ 662 "\22UDP6CSUM_Tx" \ 663 "\23TSO6" \ 664 "\24LRO" \ 665 666 #define IF_AFDATA_LOCK_INIT(ifp) \ 667 do {(ifp)->if_afdata_lock = rw_obj_alloc();} while (0) 668 669 #define IF_AFDATA_LOCK_DESTROY(ifp) rw_obj_free((ifp)->if_afdata_lock) 670 671 #define IF_AFDATA_WLOCK(ifp) rw_enter((ifp)->if_afdata_lock, RW_WRITER) 672 #define IF_AFDATA_RLOCK(ifp) rw_enter((ifp)->if_afdata_lock, RW_READER) 673 #define IF_AFDATA_WUNLOCK(ifp) rw_exit((ifp)->if_afdata_lock) 674 #define IF_AFDATA_RUNLOCK(ifp) rw_exit((ifp)->if_afdata_lock) 675 #define IF_AFDATA_LOCK(ifp) IF_AFDATA_WLOCK(ifp) 676 #define IF_AFDATA_UNLOCK(ifp) IF_AFDATA_WUNLOCK(ifp) 677 #define IF_AFDATA_TRYLOCK(ifp) rw_tryenter((ifp)->if_afdata_lock, RW_WRITER) 678 679 #define IF_AFDATA_LOCK_ASSERT(ifp) \ 680 KASSERT(rw_lock_held((ifp)->if_afdata_lock)) 681 #define IF_AFDATA_RLOCK_ASSERT(ifp) \ 682 KASSERT(rw_read_held((ifp)->if_afdata_lock)) 683 #define IF_AFDATA_WLOCK_ASSERT(ifp) \ 684 KASSERT(rw_write_held((ifp)->if_afdata_lock)) 685 686 /* 687 * Output queues (ifp->if_snd) and internetwork datagram level (pup level 1) 688 * input routines have queues of messages stored on ifqueue structures 689 * (defined above). Entries are added to and deleted from these structures 690 * by these macros, which should be called with ipl raised to splnet(). 691 */ 692 #define IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen) 693 #define IF_DROP(ifq) ((ifq)->ifq_drops++) 694 #define IF_ENQUEUE(ifq, m) do { \ 695 (m)->m_nextpkt = 0; \ 696 if ((ifq)->ifq_tail == 0) \ 697 (ifq)->ifq_head = m; \ 698 else \ 699 (ifq)->ifq_tail->m_nextpkt = m; \ 700 (ifq)->ifq_tail = m; \ 701 (ifq)->ifq_len++; \ 702 } while (/*CONSTCOND*/0) 703 #define IF_PREPEND(ifq, m) do { \ 704 (m)->m_nextpkt = (ifq)->ifq_head; \ 705 if ((ifq)->ifq_tail == 0) \ 706 (ifq)->ifq_tail = (m); \ 707 (ifq)->ifq_head = (m); \ 708 (ifq)->ifq_len++; \ 709 } while (/*CONSTCOND*/0) 710 #define IF_DEQUEUE(ifq, m) do { \ 711 (m) = (ifq)->ifq_head; \ 712 if (m) { \ 713 if (((ifq)->ifq_head = (m)->m_nextpkt) == 0) \ 714 (ifq)->ifq_tail = 0; \ 715 (m)->m_nextpkt = 0; \ 716 (ifq)->ifq_len--; \ 717 } \ 718 } while (/*CONSTCOND*/0) 719 #define IF_POLL(ifq, m) ((m) = (ifq)->ifq_head) 720 #define IF_PURGE(ifq) \ 721 do { \ 722 struct mbuf *__m0; \ 723 \ 724 for (;;) { \ 725 IF_DEQUEUE((ifq), __m0); \ 726 if (__m0 == NULL) \ 727 break; \ 728 else \ 729 m_freem(__m0); \ 730 } \ 731 } while (/*CONSTCOND*/ 0) 732 #define IF_IS_EMPTY(ifq) ((ifq)->ifq_len == 0) 733 734 #ifndef IFQ_MAXLEN 735 #define IFQ_MAXLEN 256 736 #endif 737 #define IFNET_SLOWHZ 1 /* granularity is 1 second */ 738 739 /* 740 * Structure defining statistics and other data kept regarding an address 741 * on a network interface. 742 */ 743 struct ifaddr_data { 744 int64_t ifad_inbytes; 745 int64_t ifad_outbytes; 746 }; 747 748 /* 749 * The ifaddr structure contains information about one address 750 * of an interface. They are maintained by the different address families, 751 * are allocated and attached when an address is set, and are linked 752 * together so all addresses for an interface can be located. 753 */ 754 struct ifaddr { 755 struct sockaddr *ifa_addr; /* address of interface */ 756 struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */ 757 #define ifa_broadaddr ifa_dstaddr /* broadcast address interface */ 758 struct sockaddr *ifa_netmask; /* used to determine subnet */ 759 struct ifnet *ifa_ifp; /* back-pointer to interface */ 760 TAILQ_ENTRY(ifaddr) ifa_list; /* list of addresses for interface */ 761 struct ifaddr_data ifa_data; /* statistics on the address */ 762 void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */ 763 (int, struct rtentry *, const struct rt_addrinfo *); 764 u_int ifa_flags; /* mostly rt_flags for cloning */ 765 int ifa_refcnt; /* count of references */ 766 int ifa_metric; /* cost of going out this interface */ 767 struct ifaddr *(*ifa_getifa)(struct ifaddr *, 768 const struct sockaddr *); 769 uint32_t *ifa_seqno; 770 int16_t ifa_preference; /* preference level for this address */ 771 #ifdef _KERNEL 772 struct pslist_entry ifa_pslist_entry; 773 struct psref_target ifa_psref; 774 #endif 775 }; 776 #define IFA_ROUTE RTF_UP /* (0x01) route installed */ 777 #define IFA_DESTROYING 0x2 778 779 /* 780 * Message format for use in obtaining information about interfaces from 781 * sysctl and the routing socket. We need to force 64-bit alignment if we 782 * aren't using compatiblity definitons. 783 */ 784 #if !defined(_KERNEL) || !defined(COMPAT_RTSOCK) 785 #define __align64 __aligned(sizeof(uint64_t)) 786 #else 787 #define __align64 788 #endif 789 struct if_msghdr { 790 u_short ifm_msglen __align64; 791 /* to skip over non-understood messages */ 792 u_char ifm_version; /* future binary compatibility */ 793 u_char ifm_type; /* message type */ 794 int ifm_addrs; /* like rtm_addrs */ 795 int ifm_flags; /* value of if_flags */ 796 u_short ifm_index; /* index for associated ifp */ 797 struct if_data ifm_data __align64; 798 /* statistics and other data about if */ 799 }; 800 801 /* 802 * Message format for use in obtaining information about interface addresses 803 * from sysctl and the routing socket. 804 */ 805 struct ifa_msghdr { 806 u_short ifam_msglen __align64; 807 /* to skip over non-understood messages */ 808 u_char ifam_version; /* future binary compatibility */ 809 u_char ifam_type; /* message type */ 810 u_short ifam_index; /* index for associated ifp */ 811 int ifam_flags; /* value of ifa_flags */ 812 int ifam_addrs; /* like rtm_addrs */ 813 pid_t ifam_pid; /* identify sender */ 814 int ifam_addrflags; /* family specific address flags */ 815 int ifam_metric; /* value of ifa_metric */ 816 }; 817 818 /* 819 * Message format announcing the arrival or departure of a network interface. 820 */ 821 struct if_announcemsghdr { 822 u_short ifan_msglen __align64; 823 /* to skip over non-understood messages */ 824 u_char ifan_version; /* future binary compatibility */ 825 u_char ifan_type; /* message type */ 826 u_short ifan_index; /* index for associated ifp */ 827 char ifan_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 828 u_short ifan_what; /* what type of announcement */ 829 }; 830 831 #define IFAN_ARRIVAL 0 /* interface arrival */ 832 #define IFAN_DEPARTURE 1 /* interface departure */ 833 834 #undef __align64 835 836 /* 837 * Interface request structure used for socket 838 * ioctl's. All interface ioctl's must have parameter 839 * definitions which begin with ifr_name. The 840 * remainder may be interface specific. 841 */ 842 struct ifreq { 843 char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 844 union { 845 struct sockaddr ifru_addr; 846 struct sockaddr ifru_dstaddr; 847 struct sockaddr ifru_broadaddr; 848 struct sockaddr_storage ifru_space; 849 short ifru_flags; 850 int ifru_addrflags; 851 int ifru_metric; 852 int ifru_mtu; 853 int ifru_dlt; 854 u_int ifru_value; 855 void * ifru_data; 856 struct { 857 uint32_t b_buflen; 858 void *b_buf; 859 } ifru_b; 860 } ifr_ifru; 861 #define ifr_addr ifr_ifru.ifru_addr /* address */ 862 #define ifr_dstaddr ifr_ifru.ifru_dstaddr /* other end of p-to-p link */ 863 #define ifr_broadaddr ifr_ifru.ifru_broadaddr /* broadcast address */ 864 #define ifr_space ifr_ifru.ifru_space /* sockaddr_storage */ 865 #define ifr_flags ifr_ifru.ifru_flags /* flags */ 866 #define ifr_addrflags ifr_ifru.ifru_addrflags /* addr flags */ 867 #define ifr_metric ifr_ifru.ifru_metric /* metric */ 868 #define ifr_mtu ifr_ifru.ifru_mtu /* mtu */ 869 #define ifr_dlt ifr_ifru.ifru_dlt /* data link type (DLT_*) */ 870 #define ifr_value ifr_ifru.ifru_value /* generic value */ 871 #define ifr_media ifr_ifru.ifru_metric /* media options (overload) */ 872 #define ifr_data ifr_ifru.ifru_data /* for use by interface 873 * XXX deprecated 874 */ 875 #define ifr_buf ifr_ifru.ifru_b.b_buf /* new interface ioctls */ 876 #define ifr_buflen ifr_ifru.ifru_b.b_buflen 877 #define ifr_index ifr_ifru.ifru_value /* interface index, BSD */ 878 #define ifr_ifindex ifr_index /* interface index, linux */ 879 }; 880 881 #ifdef _KERNEL 882 #define ifreq_setdstaddr ifreq_setaddr 883 #define ifreq_setbroadaddr ifreq_setaddr 884 #define ifreq_getdstaddr ifreq_getaddr 885 #define ifreq_getbroadaddr ifreq_getaddr 886 887 static __inline const struct sockaddr * 888 /*ARGSUSED*/ 889 ifreq_getaddr(u_long cmd, const struct ifreq *ifr) 890 { 891 return &ifr->ifr_addr; 892 } 893 #endif /* _KERNEL */ 894 895 struct ifcapreq { 896 char ifcr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 897 uint64_t ifcr_capabilities; /* supported capabiliites */ 898 uint64_t ifcr_capenable; /* capabilities enabled */ 899 }; 900 901 struct ifaliasreq { 902 char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 903 struct sockaddr ifra_addr; 904 struct sockaddr ifra_dstaddr; 905 #define ifra_broadaddr ifra_dstaddr 906 struct sockaddr ifra_mask; 907 }; 908 909 struct ifdatareq { 910 char ifdr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 911 struct if_data ifdr_data; 912 }; 913 914 struct ifmediareq { 915 char ifm_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 916 int ifm_current; /* IFMWD: current media options */ 917 int ifm_mask; /* IFMWD: don't care mask */ 918 int ifm_status; /* media status */ 919 int ifm_active; /* IFMWD: active options */ 920 int ifm_count; /* # entries in ifm_ulist 921 array */ 922 int *ifm_ulist; /* array of ifmedia word */ 923 }; 924 925 926 struct ifdrv { 927 char ifd_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 928 unsigned long ifd_cmd; 929 size_t ifd_len; 930 void *ifd_data; 931 }; 932 #define IFLINKSTR_QUERYLEN 0x01 933 #define IFLINKSTR_UNSET 0x02 934 935 /* 936 * Structure used in SIOCGIFCONF request. 937 * Used to retrieve interface configuration 938 * for machine (useful for programs which 939 * must know all networks accessible). 940 */ 941 struct ifconf { 942 int ifc_len; /* size of associated buffer */ 943 union { 944 void * ifcu_buf; 945 struct ifreq *ifcu_req; 946 } ifc_ifcu; 947 #define ifc_buf ifc_ifcu.ifcu_buf /* buffer address */ 948 #define ifc_req ifc_ifcu.ifcu_req /* array of structures returned */ 949 }; 950 951 /* 952 * Structure for SIOC[AGD]LIFADDR 953 */ 954 struct if_laddrreq { 955 char iflr_name[IFNAMSIZ]; 956 unsigned int flags; 957 #define IFLR_PREFIX 0x8000 /* in: prefix given out: kernel fills id */ 958 #define IFLR_ACTIVE 0x4000 /* in/out: link-layer address activation */ 959 #define IFLR_FACTORY 0x2000 /* in/out: factory link-layer address */ 960 unsigned int prefixlen; /* in/out */ 961 struct sockaddr_storage addr; /* in/out */ 962 struct sockaddr_storage dstaddr; /* out */ 963 }; 964 965 /* 966 * Structure for SIOC[SG]IFADDRPREF 967 */ 968 struct if_addrprefreq { 969 char ifap_name[IFNAMSIZ]; 970 int16_t ifap_preference; /* in/out */ 971 struct sockaddr_storage ifap_addr; /* in/out */ 972 }; 973 974 #include <net/if_arp.h> 975 976 #endif /* _NETBSD_SOURCE */ 977 978 #ifdef _KERNEL 979 #ifdef ALTQ 980 #define IFQ_ENQUEUE(ifq, m, err) \ 981 do { \ 982 mutex_enter((ifq)->ifq_lock); \ 983 if (ALTQ_IS_ENABLED(ifq)) \ 984 ALTQ_ENQUEUE((ifq), (m), (err)); \ 985 else { \ 986 if (IF_QFULL(ifq)) { \ 987 m_freem(m); \ 988 (err) = ENOBUFS; \ 989 } else { \ 990 IF_ENQUEUE((ifq), (m)); \ 991 (err) = 0; \ 992 } \ 993 } \ 994 if ((err)) \ 995 (ifq)->ifq_drops++; \ 996 mutex_exit((ifq)->ifq_lock); \ 997 } while (/*CONSTCOND*/ 0) 998 999 #define IFQ_DEQUEUE(ifq, m) \ 1000 do { \ 1001 mutex_enter((ifq)->ifq_lock); \ 1002 if (TBR_IS_ENABLED(ifq)) \ 1003 (m) = tbr_dequeue((ifq), ALTDQ_REMOVE); \ 1004 else if (ALTQ_IS_ENABLED(ifq)) \ 1005 ALTQ_DEQUEUE((ifq), (m)); \ 1006 else \ 1007 IF_DEQUEUE((ifq), (m)); \ 1008 mutex_exit((ifq)->ifq_lock); \ 1009 } while (/*CONSTCOND*/ 0) 1010 1011 #define IFQ_POLL(ifq, m) \ 1012 do { \ 1013 mutex_enter((ifq)->ifq_lock); \ 1014 if (TBR_IS_ENABLED(ifq)) \ 1015 (m) = tbr_dequeue((ifq), ALTDQ_POLL); \ 1016 else if (ALTQ_IS_ENABLED(ifq)) \ 1017 ALTQ_POLL((ifq), (m)); \ 1018 else \ 1019 IF_POLL((ifq), (m)); \ 1020 mutex_exit((ifq)->ifq_lock); \ 1021 } while (/*CONSTCOND*/ 0) 1022 1023 #define IFQ_PURGE(ifq) \ 1024 do { \ 1025 mutex_enter((ifq)->ifq_lock); \ 1026 if (ALTQ_IS_ENABLED(ifq)) \ 1027 ALTQ_PURGE(ifq); \ 1028 else \ 1029 IF_PURGE(ifq); \ 1030 mutex_exit((ifq)->ifq_lock); \ 1031 } while (/*CONSTCOND*/ 0) 1032 1033 #define IFQ_SET_READY(ifq) \ 1034 do { \ 1035 (ifq)->altq_flags |= ALTQF_READY; \ 1036 } while (/*CONSTCOND*/ 0) 1037 1038 #define IFQ_CLASSIFY(ifq, m, af) \ 1039 do { \ 1040 KASSERT(((m)->m_flags & M_PKTHDR) != 0); \ 1041 mutex_enter((ifq)->ifq_lock); \ 1042 if (ALTQ_IS_ENABLED(ifq)) { \ 1043 if (ALTQ_NEEDS_CLASSIFY(ifq)) \ 1044 (m)->m_pkthdr.pattr_class = (*(ifq)->altq_classify) \ 1045 ((ifq)->altq_clfier, (m), (af)); \ 1046 (m)->m_pkthdr.pattr_af = (af); \ 1047 (m)->m_pkthdr.pattr_hdr = mtod((m), void *); \ 1048 } \ 1049 mutex_exit((ifq)->ifq_lock); \ 1050 } while (/*CONSTCOND*/ 0) 1051 #else /* ! ALTQ */ 1052 #define IFQ_ENQUEUE(ifq, m, err) \ 1053 do { \ 1054 mutex_enter((ifq)->ifq_lock); \ 1055 if (IF_QFULL(ifq)) { \ 1056 m_freem(m); \ 1057 (err) = ENOBUFS; \ 1058 } else { \ 1059 IF_ENQUEUE((ifq), (m)); \ 1060 (err) = 0; \ 1061 } \ 1062 if (err) \ 1063 (ifq)->ifq_drops++; \ 1064 mutex_exit((ifq)->ifq_lock); \ 1065 } while (/*CONSTCOND*/ 0) 1066 1067 #define IFQ_DEQUEUE(ifq, m) \ 1068 do { \ 1069 mutex_enter((ifq)->ifq_lock); \ 1070 IF_DEQUEUE((ifq), (m)); \ 1071 mutex_exit((ifq)->ifq_lock); \ 1072 } while (/*CONSTCOND*/ 0) 1073 1074 #define IFQ_POLL(ifq, m) \ 1075 do { \ 1076 mutex_enter((ifq)->ifq_lock); \ 1077 IF_POLL((ifq), (m)); \ 1078 mutex_exit((ifq)->ifq_lock); \ 1079 } while (/*CONSTCOND*/ 0) 1080 1081 #define IFQ_PURGE(ifq) \ 1082 do { \ 1083 mutex_enter((ifq)->ifq_lock); \ 1084 IF_PURGE(ifq); \ 1085 mutex_exit((ifq)->ifq_lock); \ 1086 } while (/*CONSTCOND*/ 0) 1087 1088 #define IFQ_SET_READY(ifq) /* nothing */ 1089 1090 #define IFQ_CLASSIFY(ifq, m, af) /* nothing */ 1091 1092 #endif /* ALTQ */ 1093 1094 #define IFQ_LOCK_INIT(ifq) (ifq)->ifq_lock = \ 1095 mutex_obj_alloc(MUTEX_DEFAULT, IPL_NET) 1096 #define IFQ_LOCK_DESTROY(ifq) mutex_obj_free((ifq)->ifq_lock) 1097 #define IFQ_LOCK(ifq) mutex_enter((ifq)->ifq_lock) 1098 #define IFQ_UNLOCK(ifq) mutex_exit((ifq)->ifq_lock) 1099 1100 #define IFQ_IS_EMPTY(ifq) IF_IS_EMPTY(ifq) 1101 #define IFQ_INC_LEN(ifq) ((ifq)->ifq_len++) 1102 #define IFQ_DEC_LEN(ifq) (--(ifq)->ifq_len) 1103 #define IFQ_INC_DROPS(ifq) ((ifq)->ifq_drops++) 1104 #define IFQ_SET_MAXLEN(ifq, len) ((ifq)->ifq_maxlen = (len)) 1105 1106 #include <sys/mallocvar.h> 1107 MALLOC_DECLARE(M_IFADDR); 1108 MALLOC_DECLARE(M_IFMADDR); 1109 1110 int ifreq_setaddr(u_long, struct ifreq *, const struct sockaddr *); 1111 1112 struct ifnet *if_alloc(u_char); 1113 void if_free(struct ifnet *); 1114 void if_initname(struct ifnet *, const char *, int); 1115 struct ifaddr *if_dl_create(const struct ifnet *, const struct sockaddr_dl **); 1116 void if_activate_sadl(struct ifnet *, struct ifaddr *, 1117 const struct sockaddr_dl *); 1118 void if_set_sadl(struct ifnet *, const void *, u_char, bool); 1119 void if_alloc_sadl(struct ifnet *); 1120 void if_free_sadl(struct ifnet *, int); 1121 int if_initialize(struct ifnet *); 1122 void if_register(struct ifnet *); 1123 int if_attach(struct ifnet *); /* Deprecated. Use if_initialize and if_register */ 1124 void if_attachdomain(void); 1125 void if_deactivate(struct ifnet *); 1126 bool if_is_deactivated(const struct ifnet *); 1127 void if_export_if_data(struct ifnet *, struct if_data *, bool); 1128 void if_purgeaddrs(struct ifnet *, int, void (*)(struct ifaddr *)); 1129 void if_detach(struct ifnet *); 1130 void if_down(struct ifnet *); 1131 void if_down_locked(struct ifnet *); 1132 void if_link_state_change(struct ifnet *, int); 1133 void if_up(struct ifnet *); 1134 void ifinit(void); 1135 void ifinit1(void); 1136 void ifinit_post(void); 1137 int ifaddrpref_ioctl(struct socket *, u_long, void *, struct ifnet *); 1138 extern int (*ifioctl)(struct socket *, u_long, void *, struct lwp *); 1139 int ifioctl_common(struct ifnet *, u_long, void *); 1140 int ifpromisc(struct ifnet *, int); 1141 int ifpromisc_locked(struct ifnet *, int); 1142 int if_addr_init(ifnet_t *, struct ifaddr *, bool); 1143 int if_do_dad(struct ifnet *); 1144 int if_mcast_op(ifnet_t *, const unsigned long, const struct sockaddr *); 1145 int if_flags_set(struct ifnet *, const u_short); 1146 int if_clone_list(int, char *, int *); 1147 1148 struct ifnet *ifunit(const char *); 1149 struct ifnet *if_get(const char *, struct psref *); 1150 ifnet_t *if_byindex(u_int); 1151 ifnet_t *_if_byindex(u_int); 1152 ifnet_t *if_get_byindex(u_int, struct psref *); 1153 ifnet_t *if_get_bylla(const void *, unsigned char, struct psref *); 1154 void if_put(const struct ifnet *, struct psref *); 1155 void if_acquire(struct ifnet *, struct psref *); 1156 #define if_release if_put 1157 1158 int if_tunnel_check_nesting(struct ifnet *, struct mbuf *, int); 1159 percpu_t *if_tunnel_alloc_ro_percpu(void); 1160 void if_tunnel_free_ro_percpu(percpu_t *); 1161 void if_tunnel_ro_percpu_rtcache_free(percpu_t *); 1162 1163 struct tunnel_ro { 1164 struct route *tr_ro; 1165 kmutex_t *tr_lock; 1166 }; 1167 1168 static inline void 1169 if_tunnel_get_ro(percpu_t *ro_percpu, struct route **ro, kmutex_t **lock) 1170 { 1171 struct tunnel_ro *tro; 1172 1173 tro = percpu_getref(ro_percpu); 1174 *ro = tro->tr_ro; 1175 *lock = tro->tr_lock; 1176 mutex_enter(*lock); 1177 } 1178 1179 static inline void 1180 if_tunnel_put_ro(percpu_t *ro_percpu, kmutex_t *lock) 1181 { 1182 1183 mutex_exit(lock); 1184 percpu_putref(ro_percpu); 1185 } 1186 1187 static __inline if_index_t 1188 if_get_index(const struct ifnet *ifp) 1189 { 1190 1191 return ifp != NULL ? ifp->if_index : 0; 1192 } 1193 1194 bool if_held(struct ifnet *); 1195 1196 void if_input(struct ifnet *, struct mbuf *); 1197 1198 struct if_percpuq * 1199 if_percpuq_create(struct ifnet *); 1200 void if_percpuq_destroy(struct if_percpuq *); 1201 void 1202 if_percpuq_enqueue(struct if_percpuq *, struct mbuf *); 1203 1204 void if_deferred_start_init(struct ifnet *, void (*)(struct ifnet *)); 1205 void if_schedule_deferred_start(struct ifnet *); 1206 1207 void ifa_insert(struct ifnet *, struct ifaddr *); 1208 void ifa_remove(struct ifnet *, struct ifaddr *); 1209 1210 void ifa_psref_init(struct ifaddr *); 1211 void ifa_acquire(struct ifaddr *, struct psref *); 1212 void ifa_release(struct ifaddr *, struct psref *); 1213 bool ifa_held(struct ifaddr *); 1214 bool ifa_is_destroying(struct ifaddr *); 1215 1216 void ifaref(struct ifaddr *); 1217 void ifafree(struct ifaddr *); 1218 1219 struct ifaddr *ifa_ifwithaddr(const struct sockaddr *); 1220 struct ifaddr *ifa_ifwithaddr_psref(const struct sockaddr *, struct psref *); 1221 struct ifaddr *ifa_ifwithaf(int); 1222 struct ifaddr *ifa_ifwithdstaddr(const struct sockaddr *); 1223 struct ifaddr *ifa_ifwithdstaddr_psref(const struct sockaddr *, 1224 struct psref *); 1225 struct ifaddr *ifa_ifwithnet(const struct sockaddr *); 1226 struct ifaddr *ifa_ifwithnet_psref(const struct sockaddr *, struct psref *); 1227 struct ifaddr *ifa_ifwithladdr(const struct sockaddr *); 1228 struct ifaddr *ifa_ifwithladdr_psref(const struct sockaddr *, struct psref *); 1229 struct ifaddr *ifaof_ifpforaddr(const struct sockaddr *, struct ifnet *); 1230 struct ifaddr *ifaof_ifpforaddr_psref(const struct sockaddr *, struct ifnet *, 1231 struct psref *); 1232 void link_rtrequest(int, struct rtentry *, const struct rt_addrinfo *); 1233 void p2p_rtrequest(int, struct rtentry *, const struct rt_addrinfo *); 1234 1235 void if_clone_attach(struct if_clone *); 1236 void if_clone_detach(struct if_clone *); 1237 1238 int if_transmit_lock(struct ifnet *, struct mbuf *); 1239 1240 int ifq_enqueue(struct ifnet *, struct mbuf *); 1241 int ifq_enqueue2(struct ifnet *, struct ifqueue *, struct mbuf *); 1242 1243 int loioctl(struct ifnet *, u_long, void *); 1244 void loopattach(int); 1245 void loopinit(void); 1246 int looutput(struct ifnet *, 1247 struct mbuf *, const struct sockaddr *, const struct rtentry *); 1248 1249 /* 1250 * These are exported because they're an easy way to tell if 1251 * an interface is going away without having to burn a flag. 1252 */ 1253 int if_nulloutput(struct ifnet *, struct mbuf *, 1254 const struct sockaddr *, const struct rtentry *); 1255 void if_nullinput(struct ifnet *, struct mbuf *); 1256 void if_nullstart(struct ifnet *); 1257 int if_nulltransmit(struct ifnet *, struct mbuf *); 1258 int if_nullioctl(struct ifnet *, u_long, void *); 1259 int if_nullinit(struct ifnet *); 1260 void if_nullstop(struct ifnet *, int); 1261 void if_nullslowtimo(struct ifnet *); 1262 #define if_nullwatchdog if_nullslowtimo 1263 void if_nulldrain(struct ifnet *); 1264 #else 1265 struct if_nameindex { 1266 unsigned int if_index; /* 1, 2, ... */ 1267 char *if_name; /* null terminated name: "le0", ... */ 1268 }; 1269 1270 #include <sys/cdefs.h> 1271 __BEGIN_DECLS 1272 unsigned int if_nametoindex(const char *); 1273 char * if_indextoname(unsigned int, char *); 1274 struct if_nameindex * if_nameindex(void); 1275 void if_freenameindex(struct if_nameindex *); 1276 __END_DECLS 1277 #endif /* _KERNEL */ /* XXX really ALTQ? */ 1278 1279 #ifdef _KERNEL 1280 1281 #define IFADDR_FIRST(__ifp) TAILQ_FIRST(&(__ifp)->if_addrlist) 1282 #define IFADDR_NEXT(__ifa) TAILQ_NEXT((__ifa), ifa_list) 1283 #define IFADDR_FOREACH(__ifa, __ifp) TAILQ_FOREACH(__ifa, \ 1284 &(__ifp)->if_addrlist, ifa_list) 1285 #define IFADDR_FOREACH_SAFE(__ifa, __ifp, __nifa) \ 1286 TAILQ_FOREACH_SAFE(__ifa, \ 1287 &(__ifp)->if_addrlist, ifa_list, __nifa) 1288 #define IFADDR_EMPTY(__ifp) TAILQ_EMPTY(&(__ifp)->if_addrlist) 1289 1290 #define IFADDR_ENTRY_INIT(__ifa) \ 1291 PSLIST_ENTRY_INIT((__ifa), ifa_pslist_entry) 1292 #define IFADDR_ENTRY_DESTROY(__ifa) \ 1293 PSLIST_ENTRY_DESTROY((__ifa), ifa_pslist_entry) 1294 #define IFADDR_READER_EMPTY(__ifp) \ 1295 (PSLIST_READER_FIRST(&(__ifp)->if_addr_pslist, struct ifaddr, \ 1296 ifa_pslist_entry) == NULL) 1297 #define IFADDR_READER_FIRST(__ifp) \ 1298 PSLIST_READER_FIRST(&(__ifp)->if_addr_pslist, struct ifaddr, \ 1299 ifa_pslist_entry) 1300 #define IFADDR_READER_NEXT(__ifa) \ 1301 PSLIST_READER_NEXT((__ifa), struct ifaddr, ifa_pslist_entry) 1302 #define IFADDR_READER_FOREACH(__ifa, __ifp) \ 1303 PSLIST_READER_FOREACH((__ifa), &(__ifp)->if_addr_pslist, struct ifaddr,\ 1304 ifa_pslist_entry) 1305 #define IFADDR_WRITER_INSERT_HEAD(__ifp, __ifa) \ 1306 PSLIST_WRITER_INSERT_HEAD(&(__ifp)->if_addr_pslist, (__ifa), \ 1307 ifa_pslist_entry) 1308 #define IFADDR_WRITER_REMOVE(__ifa) \ 1309 PSLIST_WRITER_REMOVE((__ifa), ifa_pslist_entry) 1310 #define IFADDR_WRITER_FOREACH(__ifa, __ifp) \ 1311 PSLIST_WRITER_FOREACH((__ifa), &(__ifp)->if_addr_pslist, struct ifaddr,\ 1312 ifa_pslist_entry) 1313 #define IFADDR_WRITER_NEXT(__ifp) \ 1314 PSLIST_WRITER_NEXT((__ifp), struct ifaddr, ifa_pslist_entry) 1315 #define IFADDR_WRITER_INSERT_AFTER(__ifp, __new) \ 1316 PSLIST_WRITER_INSERT_AFTER((__ifp), (__new), ifa_pslist_entry) 1317 #define IFADDR_WRITER_EMPTY(__ifp) \ 1318 (PSLIST_WRITER_FIRST(&(__ifp)->if_addr_pslist, struct ifaddr, \ 1319 ifa_pslist_entry) == NULL) 1320 #define IFADDR_WRITER_INSERT_TAIL(__ifp, __new) \ 1321 do { \ 1322 if (IFADDR_WRITER_EMPTY(__ifp)) { \ 1323 IFADDR_WRITER_INSERT_HEAD((__ifp), (__new)); \ 1324 } else { \ 1325 struct ifaddr *__ifa; \ 1326 IFADDR_WRITER_FOREACH(__ifa, (__ifp)) { \ 1327 if (IFADDR_WRITER_NEXT(__ifa) == NULL) {\ 1328 IFADDR_WRITER_INSERT_AFTER(__ifa,\ 1329 (__new)); \ 1330 break; \ 1331 } \ 1332 } \ 1333 } \ 1334 } while (0) 1335 1336 #define IFNET_GLOBAL_LOCK() mutex_enter(&ifnet_mtx) 1337 #define IFNET_GLOBAL_UNLOCK() mutex_exit(&ifnet_mtx) 1338 #define IFNET_GLOBAL_LOCKED() mutex_owned(&ifnet_mtx) 1339 1340 #define IFNET_READER_EMPTY() \ 1341 (PSLIST_READER_FIRST(&ifnet_pslist, struct ifnet, if_pslist_entry) == NULL) 1342 #define IFNET_READER_FIRST() \ 1343 PSLIST_READER_FIRST(&ifnet_pslist, struct ifnet, if_pslist_entry) 1344 #define IFNET_READER_NEXT(__ifp) \ 1345 PSLIST_READER_NEXT((__ifp), struct ifnet, if_pslist_entry) 1346 #define IFNET_READER_FOREACH(__ifp) \ 1347 PSLIST_READER_FOREACH((__ifp), &ifnet_pslist, struct ifnet, \ 1348 if_pslist_entry) 1349 #define IFNET_WRITER_INSERT_HEAD(__ifp) \ 1350 PSLIST_WRITER_INSERT_HEAD(&ifnet_pslist, (__ifp), if_pslist_entry) 1351 #define IFNET_WRITER_REMOVE(__ifp) \ 1352 PSLIST_WRITER_REMOVE((__ifp), if_pslist_entry) 1353 #define IFNET_WRITER_FOREACH(__ifp) \ 1354 PSLIST_WRITER_FOREACH((__ifp), &ifnet_pslist, struct ifnet, \ 1355 if_pslist_entry) 1356 #define IFNET_WRITER_NEXT(__ifp) \ 1357 PSLIST_WRITER_NEXT((__ifp), struct ifnet, if_pslist_entry) 1358 #define IFNET_WRITER_INSERT_AFTER(__ifp, __new) \ 1359 PSLIST_WRITER_INSERT_AFTER((__ifp), (__new), if_pslist_entry) 1360 #define IFNET_WRITER_EMPTY() \ 1361 (PSLIST_WRITER_FIRST(&ifnet_pslist, struct ifnet, if_pslist_entry) == NULL) 1362 #define IFNET_WRITER_INSERT_TAIL(__new) \ 1363 do { \ 1364 if (IFNET_WRITER_EMPTY()) { \ 1365 IFNET_WRITER_INSERT_HEAD(__new); \ 1366 } else { \ 1367 struct ifnet *__ifp; \ 1368 IFNET_WRITER_FOREACH(__ifp) { \ 1369 if (IFNET_WRITER_NEXT(__ifp) == NULL) { \ 1370 IFNET_WRITER_INSERT_AFTER(__ifp,\ 1371 (__new)); \ 1372 break; \ 1373 } \ 1374 } \ 1375 } \ 1376 } while (0) 1377 1378 #define IFNET_LOCK(ifp) mutex_enter((ifp)->if_ioctl_lock) 1379 #define IFNET_UNLOCK(ifp) mutex_exit((ifp)->if_ioctl_lock) 1380 #define IFNET_LOCKED(ifp) mutex_owned((ifp)->if_ioctl_lock) 1381 1382 #define IFNET_ASSERT_UNLOCKED(ifp) \ 1383 KDASSERT(mutex_ownable((ifp)->if_ioctl_lock)) 1384 1385 extern struct pslist_head ifnet_pslist; 1386 extern kmutex_t ifnet_mtx; 1387 1388 extern struct ifnet *lo0ifp; 1389 1390 /* 1391 * ifq sysctl support 1392 */ 1393 int sysctl_ifq(int *name, u_int namelen, void *oldp, 1394 size_t *oldlenp, void *newp, size_t newlen, 1395 struct ifqueue *ifq); 1396 /* symbolic names for terminal (per-protocol) CTL_IFQ_ nodes */ 1397 #define IFQCTL_LEN 1 1398 #define IFQCTL_MAXLEN 2 1399 #define IFQCTL_PEAK 3 1400 #define IFQCTL_DROPS 4 1401 1402 /* 1403 * Hook for if_vlan - needed by if_agr 1404 */ 1405 MODULE_HOOK(if_vlan_vlan_input_hook, void, (struct ifnet *, struct mbuf *)); 1406 1407 #endif /* _KERNEL */ 1408 1409 #endif /* !_NET_IF_H_ */ 1410
Indexes created Sun Sep 21 16:09:51 GMT 2025