if.h revision 1.275
1 /* $NetBSD: if.h,v 1.275 2019/08/10 21:13:54 rmind 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 #if !defined(_KERNEL) && !defined(_STANDALONE) 67 #include <stdbool.h> 68 #endif 69 70 #include <sys/featuretest.h> 71 72 /* 73 * Length of interface external name, including terminating '\0'. 74 * Note: this is the same size as a generic device's external name. 75 */ 76 #define IF_NAMESIZE 16 77 78 /* 79 * Length of interface description, including terminating '\0'. 80 */ 81 #define IFDESCRSIZE 64 82 83 #if defined(_NETBSD_SOURCE) 84 85 #include <sys/socket.h> 86 #include <sys/queue.h> 87 #include <sys/mutex.h> 88 89 #include <net/dlt.h> 90 #include <net/pfil.h> 91 #ifdef _KERNEL 92 #include <net/pktqueue.h> 93 #include <sys/pslist.h> 94 #include <sys/pserialize.h> 95 #include <sys/psref.h> 96 #include <sys/module_hook.h> 97 #endif 98 99 /* 100 * Always include ALTQ glue here -- we use the ALTQ interface queue 101 * structure even when ALTQ is not configured into the kernel so that 102 * the size of struct ifnet does not changed based on the option. The 103 * ALTQ queue structure is API-compatible with the legacy ifqueue. 104 */ 105 #include <altq/if_altq.h> 106 107 /* 108 * Structures defining a network interface, providing a packet 109 * transport mechanism (ala level 0 of the PUP protocols). 110 * 111 * Each interface accepts output datagrams of a specified maximum 112 * length, and provides higher level routines with input datagrams 113 * received from its medium. 114 * 115 * Output occurs when the routine if_output is called, with four parameters: 116 * (*ifp->if_output)(ifp, m, dst, rt) 117 * Here m is the mbuf chain to be sent and dst is the destination address. 118 * The output routine encapsulates the supplied datagram if necessary, 119 * and then transmits it on its medium. 120 * 121 * On input, each interface unwraps the data received by it, and either 122 * places it on the input queue of a internetwork datagram routine 123 * and posts the associated software interrupt, or passes the datagram to a raw 124 * packet input routine. 125 * 126 * Routines exist for locating interfaces by their addresses 127 * or for locating a interface on a certain network, as well as more general 128 * routing and gateway routines maintaining information used to locate 129 * interfaces. These routines live in the files if.c and route.c 130 */ 131 #include <sys/time.h> 132 133 #if defined(_KERNEL_OPT) 134 #include "opt_compat_netbsd.h" 135 #include "opt_gateway.h" 136 #endif 137 138 struct mbuf; 139 struct proc; 140 struct rtentry; 141 struct socket; 142 struct ether_header; 143 struct ifaddr; 144 struct ifnet; 145 struct rt_addrinfo; 146 147 #define IFNAMSIZ IF_NAMESIZE 148 149 /* 150 * Structure describing a `cloning' interface. 151 */ 152 struct if_clone { 153 LIST_ENTRY(if_clone) ifc_list; /* on list of cloners */ 154 const char *ifc_name; /* name of device, e.g. `gif' */ 155 size_t ifc_namelen; /* length of name */ 156 157 int (*ifc_create)(struct if_clone *, int); 158 int (*ifc_destroy)(struct ifnet *); 159 }; 160 161 #define IF_CLONE_INITIALIZER(name, create, destroy) \ 162 { { NULL, NULL }, name, sizeof(name) - 1, create, destroy } 163 164 /* 165 * Structure used to query names of interface cloners. 166 */ 167 struct if_clonereq { 168 int ifcr_total; /* total cloners (out) */ 169 int ifcr_count; /* room for this many in user buffer */ 170 char *ifcr_buffer; /* buffer for cloner names */ 171 }; 172 173 /* 174 * Structure defining statistics and other data kept regarding a network 175 * interface. 176 */ 177 struct if_data { 178 /* generic interface information */ 179 u_char ifi_type; /* ethernet, tokenring, etc. */ 180 u_char ifi_addrlen; /* media address length */ 181 u_char ifi_hdrlen; /* media header length */ 182 int ifi_link_state; /* current link state */ 183 uint64_t ifi_mtu; /* maximum transmission unit */ 184 uint64_t ifi_metric; /* routing metric (external only) */ 185 uint64_t ifi_baudrate; /* linespeed */ 186 /* volatile statistics */ 187 uint64_t ifi_ipackets; /* packets received on interface */ 188 uint64_t ifi_ierrors; /* input errors on interface */ 189 uint64_t ifi_opackets; /* packets sent on interface */ 190 uint64_t ifi_oerrors; /* output errors on interface */ 191 uint64_t ifi_collisions; /* collisions on csma interfaces */ 192 uint64_t ifi_ibytes; /* total number of octets received */ 193 uint64_t ifi_obytes; /* total number of octets sent */ 194 uint64_t ifi_imcasts; /* packets received via multicast */ 195 uint64_t ifi_omcasts; /* packets sent via multicast */ 196 uint64_t ifi_iqdrops; /* dropped on input, this interface */ 197 uint64_t ifi_noproto; /* destined for unsupported protocol */ 198 struct timespec ifi_lastchange;/* last operational state change */ 199 }; 200 201 /* 202 * Values for if_link_state. 203 */ 204 #define LINK_STATE_UNKNOWN 0 /* link invalid/unknown */ 205 #define LINK_STATE_DOWN 1 /* link is down */ 206 #define LINK_STATE_UP 2 /* link is up */ 207 208 /* 209 * Structure defining a queue for a network interface. 210 */ 211 struct ifqueue { 212 struct mbuf *ifq_head; 213 struct mbuf *ifq_tail; 214 int ifq_len; 215 int ifq_maxlen; 216 int ifq_drops; 217 kmutex_t *ifq_lock; 218 }; 219 220 #ifdef _KERNEL 221 #include <sys/percpu.h> 222 #include <sys/callout.h> 223 #include <sys/rwlock.h> 224 225 #endif /* _KERNEL */ 226 227 /* 228 * Structure defining a queue for a network interface. 229 * 230 * (Would like to call this struct ``if'', but C isn't PL/1.) 231 */ 232 TAILQ_HEAD(ifnet_head, ifnet); /* the actual queue head */ 233 234 struct bridge_softc; 235 struct bridge_iflist; 236 struct callout; 237 struct krwlock; 238 struct if_percpuq; 239 struct if_deferred_start; 240 struct in6_multi; 241 242 typedef unsigned short if_index_t; 243 244 /* 245 * Interface. Field markings and the corresponding locks: 246 * 247 * i: IFNET_LOCK (a.k.a., if_ioctl_lock) 248 * q: ifq_lock (struct ifaltq) 249 * a: if_afdata_lock 250 * 6: in6_multilock (global lock) 251 * :: unlocked, stable 252 * ?: unknown, maybe unsafe 253 * 254 * Lock order: IFNET_LOCK => in6_multilock => if_afdata_lock => ifq_lock 255 * Note that currently if_afdata_lock and ifq_lock aren't held 256 * at the same time, but define the order anyway. 257 * 258 * Lock order of IFNET_LOCK with other locks: 259 * softnet_lock => solock => IFNET_LOCK => ND6_LOCK, in_multilock 260 */ 261 typedef struct ifnet { 262 void *if_softc; /* :: lower-level data for this if */ 263 /* DEPRECATED. Keep it to avoid breaking kvm(3) users */ 264 TAILQ_ENTRY(ifnet) 265 if_list; /* i: all struct ifnets are chained */ 266 TAILQ_HEAD(, ifaddr) 267 if_addrlist; /* i: linked list of addresses per if */ 268 char if_xname[IFNAMSIZ]; 269 /* :: external name (name + unit) */ 270 int if_pcount; /* i: number of promiscuous listeners */ 271 struct bpf_if *if_bpf; /* :: packet filter structure */ 272 if_index_t if_index; /* :: numeric abbreviation for this if */ 273 short if_timer; /* ?: time 'til if_slowtimo called */ 274 unsigned short if_flags; /* i: up/down, broadcast, etc. */ 275 short if_extflags; /* :: if_output MP-safe, etc. */ 276 struct if_data if_data; /* ?: statistics and other data about if */ 277 /* 278 * Procedure handles. If you add more of these, don't forget the 279 * corresponding NULL stub in if.c. 280 */ 281 int (*if_output) /* :: output routine (enqueue) */ 282 (struct ifnet *, struct mbuf *, const struct sockaddr *, 283 const struct rtentry *); 284 void (*_if_input) /* :: input routine (from h/w driver) */ 285 (struct ifnet *, struct mbuf *); 286 void (*if_start) /* :: initiate output routine */ 287 (struct ifnet *); 288 int (*if_transmit) /* :: output routine, must be MP-safe */ 289 (struct ifnet *, struct mbuf *); 290 int (*if_ioctl) /* :: ioctl routine */ 291 (struct ifnet *, u_long, void *); 292 int (*if_init) /* :: init routine */ 293 (struct ifnet *); 294 void (*if_stop) /* :: stop routine */ 295 (struct ifnet *, int); 296 void (*if_slowtimo) /* :: timer routine */ 297 (struct ifnet *); 298 #define if_watchdog if_slowtimo 299 void (*if_drain) /* :: routine to release resources */ 300 (struct ifnet *); 301 struct ifaltq if_snd; /* q: output queue (includes altq) */ 302 struct ifaddr *if_dl; /* i: identity of this interface. */ 303 const struct sockaddr_dl 304 *if_sadl; /* i: pointer to sockaddr_dl of if_dl */ 305 /* 306 * May be NULL. If not NULL, it is the address assigned 307 * to the interface by the manufacturer, so it very likely 308 * to be unique. It MUST NOT be deleted. It is highly 309 * suitable for deriving the EUI64 for the interface. 310 */ 311 struct ifaddr *if_hwdl; /* i: h/w identity */ 312 const uint8_t *if_broadcastaddr; 313 /* :: linklevel broadcast bytestring */ 314 struct bridge_softc 315 *if_bridge; /* i: bridge glue */ 316 struct bridge_iflist 317 *if_bridgeif; /* i: shortcut to interface list entry */ 318 int if_dlt; /* :: data link type (<net/dlt.h>) */ 319 pfil_head_t * if_pfil; /* :: filtering point */ 320 uint64_t if_capabilities; 321 /* i: interface capabilities */ 322 uint64_t if_capenable; /* i: capabilities enabled */ 323 union { 324 void * carp_s; /* carp structure (used by !carp ifs) */ 325 struct ifnet *carp_d;/* ptr to carpdev (used by carp ifs) */ 326 } if_carp_ptr; /* ?: */ 327 #define if_carp if_carp_ptr.carp_s 328 #define if_carpdev if_carp_ptr.carp_d 329 /* 330 * These are pre-computed based on an interfaces enabled 331 * capabilities, for speed elsewhere. 332 */ 333 int if_csum_flags_tx; 334 /* i: M_CSUM_* flags for Tx */ 335 int if_csum_flags_rx; 336 /* i: M_CSUM_* flags for Rx */ 337 338 void *if_afdata[AF_MAX]; 339 /* a: */ 340 struct mowner *if_mowner; /* ?: who owns mbufs for this interface */ 341 342 void *if_agrprivate; /* ?: used only when #if NAGR > 0 */ 343 void *if_npf_private;/* ?: associated NPF context */ 344 345 /* 346 * pf specific data, used only when #if NPF > 0. 347 */ 348 void *if_pf_kif; /* ?: pf interface abstraction */ 349 void *if_pf_groups; /* ?: pf interface groups */ 350 /* 351 * During an ifnet's lifetime, it has only one if_index, but 352 * and if_index is not sufficient to identify an ifnet 353 * because during the lifetime of the system, many ifnets may occupy a 354 * given if_index. Let us tell different ifnets at the same 355 * if_index apart by their if_index_gen, a unique number that each ifnet 356 * is assigned when it if_attach()s. Now, the kernel can use the 357 * pair (if_index, if_index_gen) as a weak reference to an ifnet. 358 */ 359 uint64_t if_index_gen; /* :: generation number for the ifnet 360 * at if_index: if two ifnets' index 361 * and generation number are both the 362 * same, they are the same ifnet. 363 */ 364 struct sysctllog 365 *if_sysctl_log; /* :: */ 366 int (*if_initaddr) /* :: */ 367 (struct ifnet *, struct ifaddr *, bool); 368 int (*if_mcastop) /* :: */ 369 (struct ifnet *, const unsigned long, 370 const struct sockaddr *); 371 int (*if_setflags) /* :: */ 372 (struct ifnet *, const short); 373 kmutex_t *if_ioctl_lock; /* :: */ 374 char *if_description; /* i: interface description */ 375 #ifdef _KERNEL /* XXX kvm(3) */ 376 struct callout *if_slowtimo_ch;/* :: */ 377 struct krwlock *if_afdata_lock;/* :: */ 378 struct if_percpuq 379 *if_percpuq; /* :: we should remove it in the future */ 380 void *if_link_si; /* :: softint to handle link state changes */ 381 uint16_t if_link_queue; /* q: masked link state change queue */ 382 struct pslist_entry 383 if_pslist_entry;/* i: */ 384 struct psref_target 385 if_psref; /* :: */ 386 struct pslist_head 387 if_addr_pslist; /* i: */ 388 struct if_deferred_start 389 *if_deferred_start; 390 /* :: */ 391 /* XXX should be protocol independent */ 392 LIST_HEAD(, in6_multi) 393 if_multiaddrs; /* 6: */ 394 #endif 395 } ifnet_t; 396 397 #define if_mtu if_data.ifi_mtu 398 #define if_type if_data.ifi_type 399 #define if_addrlen if_data.ifi_addrlen 400 #define if_hdrlen if_data.ifi_hdrlen 401 #define if_metric if_data.ifi_metric 402 #define if_link_state if_data.ifi_link_state 403 #define if_baudrate if_data.ifi_baudrate 404 #define if_ipackets if_data.ifi_ipackets 405 #define if_ierrors if_data.ifi_ierrors 406 #define if_opackets if_data.ifi_opackets 407 #define if_oerrors if_data.ifi_oerrors 408 #define if_collisions if_data.ifi_collisions 409 #define if_ibytes if_data.ifi_ibytes 410 #define if_obytes if_data.ifi_obytes 411 #define if_imcasts if_data.ifi_imcasts 412 #define if_omcasts if_data.ifi_omcasts 413 #define if_iqdrops if_data.ifi_iqdrops 414 #define if_noproto if_data.ifi_noproto 415 #define if_lastchange if_data.ifi_lastchange 416 #define if_name(ifp) ((ifp)->if_xname) 417 418 #define IFF_UP 0x0001 /* interface is up */ 419 #define IFF_BROADCAST 0x0002 /* broadcast address valid */ 420 #define IFF_DEBUG 0x0004 /* turn on debugging */ 421 #define IFF_LOOPBACK 0x0008 /* is a loopback net */ 422 #define IFF_POINTOPOINT 0x0010 /* interface is point-to-point link */ 423 /* 0x0020 was IFF_NOTRAILERS */ 424 #define IFF_RUNNING 0x0040 /* resources allocated */ 425 #define IFF_NOARP 0x0080 /* no address resolution protocol */ 426 #define IFF_PROMISC 0x0100 /* receive all packets */ 427 #define IFF_ALLMULTI 0x0200 /* receive all multicast packets */ 428 #define IFF_OACTIVE 0x0400 /* transmission in progress */ 429 #define IFF_SIMPLEX 0x0800 /* can't hear own transmissions */ 430 #define IFF_LINK0 0x1000 /* per link layer defined bit */ 431 #define IFF_LINK1 0x2000 /* per link layer defined bit */ 432 #define IFF_LINK2 0x4000 /* per link layer defined bit */ 433 #define IFF_MULTICAST 0x8000 /* supports multicast */ 434 435 #define IFEF_MPSAFE __BIT(0) /* handlers can run in parallel (see below) */ 436 #define IFEF_NO_LINK_STATE_CHANGE __BIT(1) /* doesn't use link state interrupts */ 437 438 /* 439 * The guidelines for converting an interface to IFEF_MPSAFE are as follows 440 * 441 * Enabling IFEF_MPSAFE on an interface suppresses taking KERNEL_LOCK when 442 * calling the following handlers: 443 * - if_start 444 * - Note that if_transmit is always called without KERNEL_LOCK 445 * - if_output 446 * - if_ioctl 447 * - if_init 448 * - if_stop 449 * 450 * This means that an interface with IFEF_MPSAFE must make the above handlers 451 * MP-safe or take KERNEL_LOCK by itself inside handlers that aren't MP-safe 452 * yet. 453 * 454 * There are some additional restrictions to access member variables of struct 455 * ifnet: 456 * - if_flags 457 * - Must be updated with holding IFNET_LOCK 458 * - You cannot use the flag in Tx/Rx paths anymore because there is no 459 * synchronization on the flag except for IFNET_LOCK 460 * - Note that IFNET_LOCK can't be taken in softint because it's known 461 * that it causes a deadlock 462 * - Some synchronization mechanisms such as pserialize_perform are called 463 * with IFNET_LOCK and also require context switches on every CPUs 464 * that mean softints finish so trying to take IFNET_LOCK in softint 465 * might block on IFNET_LOCK and prevent such synchronization mechanisms 466 * from being completed 467 * - Currently the deadlock occurs only if NET_MPSAFE is enabled, however, 468 * we should deal with the restriction because NET_MPSAFE will be enabled 469 * by default in the future 470 * - if_watchdog and if_timer 471 * - The watchdog framework works only for non-IFEF_MPSAFE interfaces 472 * that rely on KERNEL_LOCK 473 * - Interfaces with IFEF_MPSAFE have to provide its own watchdog mechanism 474 * if needed 475 * - Keep if_watchdog NULL when calling if_attach 476 */ 477 478 #ifdef _KERNEL 479 static __inline bool 480 if_is_mpsafe(struct ifnet *ifp) 481 { 482 483 return ((ifp->if_extflags & IFEF_MPSAFE) != 0); 484 } 485 486 static __inline int 487 if_output_lock(struct ifnet *cifp, struct ifnet *ifp, struct mbuf *m, 488 const struct sockaddr *dst, const struct rtentry *rt) 489 { 490 491 if (if_is_mpsafe(cifp)) { 492 return (*cifp->if_output)(ifp, m, dst, rt); 493 } else { 494 int ret; 495 496 KERNEL_LOCK(1, NULL); 497 ret = (*cifp->if_output)(ifp, m, dst, rt); 498 KERNEL_UNLOCK_ONE(NULL); 499 return ret; 500 } 501 } 502 503 static __inline void 504 if_start_lock(struct ifnet *ifp) 505 { 506 507 if (if_is_mpsafe(ifp)) { 508 (*ifp->if_start)(ifp); 509 } else { 510 KERNEL_LOCK(1, NULL); 511 (*ifp->if_start)(ifp); 512 KERNEL_UNLOCK_ONE(NULL); 513 } 514 } 515 516 static __inline bool 517 if_is_link_state_changeable(struct ifnet *ifp) 518 { 519 520 return ((ifp->if_extflags & IFEF_NO_LINK_STATE_CHANGE) == 0); 521 } 522 523 #define KERNEL_LOCK_IF_IFP_MPSAFE(ifp) \ 524 do { if (if_is_mpsafe(ifp)) { KERNEL_LOCK(1, NULL); } } while (0) 525 #define KERNEL_UNLOCK_IF_IFP_MPSAFE(ifp) \ 526 do { if (if_is_mpsafe(ifp)) { KERNEL_UNLOCK_ONE(NULL); } } while (0) 527 528 #define KERNEL_LOCK_UNLESS_IFP_MPSAFE(ifp) \ 529 do { if (!if_is_mpsafe(ifp)) { KERNEL_LOCK(1, NULL); } } while (0) 530 #define KERNEL_UNLOCK_UNLESS_IFP_MPSAFE(ifp) \ 531 do { if (!if_is_mpsafe(ifp)) { KERNEL_UNLOCK_ONE(NULL); } } while (0) 532 533 #ifdef _KERNEL_OPT 534 #include "opt_net_mpsafe.h" 535 #endif 536 537 /* XXX explore a better place to define */ 538 #ifdef NET_MPSAFE 539 540 #define KERNEL_LOCK_UNLESS_NET_MPSAFE() do { } while (0) 541 #define KERNEL_UNLOCK_UNLESS_NET_MPSAFE() do { } while (0) 542 543 #define SOFTNET_LOCK_UNLESS_NET_MPSAFE() do { } while (0) 544 #define SOFTNET_UNLOCK_UNLESS_NET_MPSAFE() do { } while (0) 545 546 #define SOFTNET_LOCK_IF_NET_MPSAFE() \ 547 do { mutex_enter(softnet_lock); } while (0) 548 #define SOFTNET_UNLOCK_IF_NET_MPSAFE() \ 549 do { mutex_exit(softnet_lock); } while (0) 550 551 #else /* NET_MPSAFE */ 552 553 #define KERNEL_LOCK_UNLESS_NET_MPSAFE() \ 554 do { KERNEL_LOCK(1, NULL); } while (0) 555 #define KERNEL_UNLOCK_UNLESS_NET_MPSAFE() \ 556 do { KERNEL_UNLOCK_ONE(NULL); } while (0) 557 558 #define SOFTNET_LOCK_UNLESS_NET_MPSAFE() \ 559 do { mutex_enter(softnet_lock); } while (0) 560 #define SOFTNET_UNLOCK_UNLESS_NET_MPSAFE() \ 561 do { mutex_exit(softnet_lock); } while (0) 562 563 #define SOFTNET_LOCK_IF_NET_MPSAFE() do { } while (0) 564 #define SOFTNET_UNLOCK_IF_NET_MPSAFE() do { } while (0) 565 566 #endif /* NET_MPSAFE */ 567 568 #define SOFTNET_KERNEL_LOCK_UNLESS_NET_MPSAFE() \ 569 do { \ 570 SOFTNET_LOCK_UNLESS_NET_MPSAFE(); \ 571 KERNEL_LOCK_UNLESS_NET_MPSAFE(); \ 572 } while (0) 573 574 #define SOFTNET_KERNEL_UNLOCK_UNLESS_NET_MPSAFE() \ 575 do { \ 576 KERNEL_UNLOCK_UNLESS_NET_MPSAFE(); \ 577 SOFTNET_UNLOCK_UNLESS_NET_MPSAFE(); \ 578 } while (0) 579 580 #endif /* _KERNEL */ 581 582 #define IFFBITS \ 583 "\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT" \ 584 "\7RUNNING\10NOARP\11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX" \ 585 "\15LINK0\16LINK1\17LINK2\20MULTICAST" 586 587 /* flags set internally only: */ 588 #define IFF_CANTCHANGE \ 589 (IFF_BROADCAST|IFF_POINTOPOINT|IFF_RUNNING|IFF_OACTIVE|\ 590 IFF_SIMPLEX|IFF_MULTICAST|IFF_ALLMULTI|IFF_PROMISC) 591 592 /* 593 * Some convenience macros used for setting ifi_baudrate. 594 */ 595 #define IF_Kbps(x) ((x) * 1000ULL) /* kilobits/sec. */ 596 #define IF_Mbps(x) (IF_Kbps((x) * 1000ULL)) /* megabits/sec. */ 597 #define IF_Gbps(x) (IF_Mbps((x) * 1000ULL)) /* gigabits/sec. */ 598 599 /* Capabilities that interfaces can advertise. */ 600 /* 0x01 .. 0x40 were previously used */ 601 #define IFCAP_TSOv4 0x00080 /* can do TCPv4 segmentation offload */ 602 #define IFCAP_CSUM_IPv4_Rx 0x00100 /* can do IPv4 header checksums (Rx) */ 603 #define IFCAP_CSUM_IPv4_Tx 0x00200 /* can do IPv4 header checksums (Tx) */ 604 #define IFCAP_CSUM_TCPv4_Rx 0x00400 /* can do IPv4/TCP checksums (Rx) */ 605 #define IFCAP_CSUM_TCPv4_Tx 0x00800 /* can do IPv4/TCP checksums (Tx) */ 606 #define IFCAP_CSUM_UDPv4_Rx 0x01000 /* can do IPv4/UDP checksums (Rx) */ 607 #define IFCAP_CSUM_UDPv4_Tx 0x02000 /* can do IPv4/UDP checksums (Tx) */ 608 #define IFCAP_CSUM_TCPv6_Rx 0x04000 /* can do IPv6/TCP checksums (Rx) */ 609 #define IFCAP_CSUM_TCPv6_Tx 0x08000 /* can do IPv6/TCP checksums (Tx) */ 610 #define IFCAP_CSUM_UDPv6_Rx 0x10000 /* can do IPv6/UDP checksums (Rx) */ 611 #define IFCAP_CSUM_UDPv6_Tx 0x20000 /* can do IPv6/UDP checksums (Tx) */ 612 #define IFCAP_TSOv6 0x40000 /* can do TCPv6 segmentation offload */ 613 #define IFCAP_LRO 0x80000 /* can do Large Receive Offload */ 614 #define IFCAP_MASK 0xfff80 /* currently valid capabilities */ 615 616 #define IFCAPBITS \ 617 "\020" \ 618 "\10TSO4" \ 619 "\11IP4CSUM_Rx" \ 620 "\12IP4CSUM_Tx" \ 621 "\13TCP4CSUM_Rx" \ 622 "\14TCP4CSUM_Tx" \ 623 "\15UDP4CSUM_Rx" \ 624 "\16UDP4CSUM_Tx" \ 625 "\17TCP6CSUM_Rx" \ 626 "\20TCP6CSUM_Tx" \ 627 "\21UDP6CSUM_Rx" \ 628 "\22UDP6CSUM_Tx" \ 629 "\23TSO6" \ 630 "\24LRO" \ 631 632 #define IF_AFDATA_LOCK_INIT(ifp) \ 633 do {(ifp)->if_afdata_lock = rw_obj_alloc();} while (0) 634 635 #define IF_AFDATA_LOCK_DESTROY(ifp) rw_obj_free((ifp)->if_afdata_lock) 636 637 #define IF_AFDATA_WLOCK(ifp) rw_enter((ifp)->if_afdata_lock, RW_WRITER) 638 #define IF_AFDATA_RLOCK(ifp) rw_enter((ifp)->if_afdata_lock, RW_READER) 639 #define IF_AFDATA_WUNLOCK(ifp) rw_exit((ifp)->if_afdata_lock) 640 #define IF_AFDATA_RUNLOCK(ifp) rw_exit((ifp)->if_afdata_lock) 641 #define IF_AFDATA_LOCK(ifp) IF_AFDATA_WLOCK(ifp) 642 #define IF_AFDATA_UNLOCK(ifp) IF_AFDATA_WUNLOCK(ifp) 643 #define IF_AFDATA_TRYLOCK(ifp) rw_tryenter((ifp)->if_afdata_lock, RW_WRITER) 644 645 #define IF_AFDATA_LOCK_ASSERT(ifp) \ 646 KASSERT(rw_lock_held((ifp)->if_afdata_lock)) 647 #define IF_AFDATA_RLOCK_ASSERT(ifp) \ 648 KASSERT(rw_read_held((ifp)->if_afdata_lock)) 649 #define IF_AFDATA_WLOCK_ASSERT(ifp) \ 650 KASSERT(rw_write_held((ifp)->if_afdata_lock)) 651 652 /* 653 * Output queues (ifp->if_snd) and internetwork datagram level (pup level 1) 654 * input routines have queues of messages stored on ifqueue structures 655 * (defined above). Entries are added to and deleted from these structures 656 * by these macros, which should be called with ipl raised to splnet(). 657 */ 658 #define IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen) 659 #define IF_DROP(ifq) ((ifq)->ifq_drops++) 660 #define IF_ENQUEUE(ifq, m) do { \ 661 (m)->m_nextpkt = 0; \ 662 if ((ifq)->ifq_tail == 0) \ 663 (ifq)->ifq_head = m; \ 664 else \ 665 (ifq)->ifq_tail->m_nextpkt = m; \ 666 (ifq)->ifq_tail = m; \ 667 (ifq)->ifq_len++; \ 668 } while (/*CONSTCOND*/0) 669 #define IF_PREPEND(ifq, m) do { \ 670 (m)->m_nextpkt = (ifq)->ifq_head; \ 671 if ((ifq)->ifq_tail == 0) \ 672 (ifq)->ifq_tail = (m); \ 673 (ifq)->ifq_head = (m); \ 674 (ifq)->ifq_len++; \ 675 } while (/*CONSTCOND*/0) 676 #define IF_DEQUEUE(ifq, m) do { \ 677 (m) = (ifq)->ifq_head; \ 678 if (m) { \ 679 if (((ifq)->ifq_head = (m)->m_nextpkt) == 0) \ 680 (ifq)->ifq_tail = 0; \ 681 (m)->m_nextpkt = 0; \ 682 (ifq)->ifq_len--; \ 683 } \ 684 } while (/*CONSTCOND*/0) 685 #define IF_POLL(ifq, m) ((m) = (ifq)->ifq_head) 686 #define IF_PURGE(ifq) \ 687 do { \ 688 struct mbuf *__m0; \ 689 \ 690 for (;;) { \ 691 IF_DEQUEUE((ifq), __m0); \ 692 if (__m0 == NULL) \ 693 break; \ 694 else \ 695 m_freem(__m0); \ 696 } \ 697 } while (/*CONSTCOND*/ 0) 698 #define IF_IS_EMPTY(ifq) ((ifq)->ifq_len == 0) 699 700 #ifndef IFQ_MAXLEN 701 #define IFQ_MAXLEN 256 702 #endif 703 #define IFNET_SLOWHZ 1 /* granularity is 1 second */ 704 705 /* 706 * Structure defining statistics and other data kept regarding an address 707 * on a network interface. 708 */ 709 struct ifaddr_data { 710 int64_t ifad_inbytes; 711 int64_t ifad_outbytes; 712 }; 713 714 /* 715 * The ifaddr structure contains information about one address 716 * of an interface. They are maintained by the different address families, 717 * are allocated and attached when an address is set, and are linked 718 * together so all addresses for an interface can be located. 719 */ 720 struct ifaddr { 721 struct sockaddr *ifa_addr; /* address of interface */ 722 struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */ 723 #define ifa_broadaddr ifa_dstaddr /* broadcast address interface */ 724 struct sockaddr *ifa_netmask; /* used to determine subnet */ 725 struct ifnet *ifa_ifp; /* back-pointer to interface */ 726 TAILQ_ENTRY(ifaddr) ifa_list; /* list of addresses for interface */ 727 struct ifaddr_data ifa_data; /* statistics on the address */ 728 void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */ 729 (int, struct rtentry *, const struct rt_addrinfo *); 730 u_int ifa_flags; /* mostly rt_flags for cloning */ 731 int ifa_refcnt; /* count of references */ 732 int ifa_metric; /* cost of going out this interface */ 733 struct ifaddr *(*ifa_getifa)(struct ifaddr *, 734 const struct sockaddr *); 735 uint32_t *ifa_seqno; 736 int16_t ifa_preference; /* preference level for this address */ 737 #ifdef _KERNEL 738 struct pslist_entry ifa_pslist_entry; 739 struct psref_target ifa_psref; 740 #endif 741 }; 742 #define IFA_ROUTE RTF_UP /* (0x01) route installed */ 743 #define IFA_DESTROYING 0x2 744 745 /* 746 * Message format for use in obtaining information about interfaces from 747 * sysctl and the routing socket. We need to force 64-bit alignment if we 748 * aren't using compatiblity definitons. 749 */ 750 #if !defined(_KERNEL) || !defined(COMPAT_RTSOCK) 751 #define __align64 __aligned(sizeof(uint64_t)) 752 #else 753 #define __align64 754 #endif 755 struct if_msghdr { 756 u_short ifm_msglen __align64; 757 /* to skip over non-understood messages */ 758 u_char ifm_version; /* future binary compatibility */ 759 u_char ifm_type; /* message type */ 760 int ifm_addrs; /* like rtm_addrs */ 761 int ifm_flags; /* value of if_flags */ 762 u_short ifm_index; /* index for associated ifp */ 763 struct if_data ifm_data __align64; 764 /* statistics and other data about if */ 765 }; 766 767 /* 768 * Message format for use in obtaining information about interface addresses 769 * from sysctl and the routing socket. 770 */ 771 struct ifa_msghdr { 772 u_short ifam_msglen __align64; 773 /* to skip over non-understood messages */ 774 u_char ifam_version; /* future binary compatibility */ 775 u_char ifam_type; /* message type */ 776 u_short ifam_index; /* index for associated ifp */ 777 int ifam_flags; /* value of ifa_flags */ 778 int ifam_addrs; /* like rtm_addrs */ 779 pid_t ifam_pid; /* identify sender */ 780 int ifam_addrflags; /* family specific address flags */ 781 int ifam_metric; /* value of ifa_metric */ 782 }; 783 784 /* 785 * Message format announcing the arrival or departure of a network interface. 786 */ 787 struct if_announcemsghdr { 788 u_short ifan_msglen __align64; 789 /* to skip over non-understood messages */ 790 u_char ifan_version; /* future binary compatibility */ 791 u_char ifan_type; /* message type */ 792 u_short ifan_index; /* index for associated ifp */ 793 char ifan_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 794 u_short ifan_what; /* what type of announcement */ 795 }; 796 797 #define IFAN_ARRIVAL 0 /* interface arrival */ 798 #define IFAN_DEPARTURE 1 /* interface departure */ 799 800 #undef __align64 801 802 /* 803 * Interface request structure used for socket 804 * ioctl's. All interface ioctl's must have parameter 805 * definitions which begin with ifr_name. The 806 * remainder may be interface specific. 807 */ 808 struct ifreq { 809 char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 810 union { 811 struct sockaddr ifru_addr; 812 struct sockaddr ifru_dstaddr; 813 struct sockaddr ifru_broadaddr; 814 struct sockaddr_storage ifru_space; 815 short ifru_flags; 816 int ifru_addrflags; 817 int ifru_metric; 818 int ifru_mtu; 819 int ifru_dlt; 820 u_int ifru_value; 821 void * ifru_data; 822 struct { 823 uint32_t b_buflen; 824 void *b_buf; 825 } ifru_b; 826 } ifr_ifru; 827 #define ifr_addr ifr_ifru.ifru_addr /* address */ 828 #define ifr_dstaddr ifr_ifru.ifru_dstaddr /* other end of p-to-p link */ 829 #define ifr_broadaddr ifr_ifru.ifru_broadaddr /* broadcast address */ 830 #define ifr_space ifr_ifru.ifru_space /* sockaddr_storage */ 831 #define ifr_flags ifr_ifru.ifru_flags /* flags */ 832 #define ifr_addrflags ifr_ifru.ifru_addrflags /* addr flags */ 833 #define ifr_metric ifr_ifru.ifru_metric /* metric */ 834 #define ifr_mtu ifr_ifru.ifru_mtu /* mtu */ 835 #define ifr_dlt ifr_ifru.ifru_dlt /* data link type (DLT_*) */ 836 #define ifr_value ifr_ifru.ifru_value /* generic value */ 837 #define ifr_media ifr_ifru.ifru_metric /* media options (overload) */ 838 #define ifr_data ifr_ifru.ifru_data /* for use by interface 839 * XXX deprecated 840 */ 841 #define ifr_buf ifr_ifru.ifru_b.b_buf /* new interface ioctls */ 842 #define ifr_buflen ifr_ifru.ifru_b.b_buflen 843 #define ifr_index ifr_ifru.ifru_value /* interface index, BSD */ 844 #define ifr_ifindex ifr_index /* interface index, linux */ 845 }; 846 847 #ifdef _KERNEL 848 #define ifreq_setdstaddr ifreq_setaddr 849 #define ifreq_setbroadaddr ifreq_setaddr 850 #define ifreq_getdstaddr ifreq_getaddr 851 #define ifreq_getbroadaddr ifreq_getaddr 852 853 static __inline const struct sockaddr * 854 /*ARGSUSED*/ 855 ifreq_getaddr(u_long cmd, const struct ifreq *ifr) 856 { 857 return &ifr->ifr_addr; 858 } 859 #endif /* _KERNEL */ 860 861 struct ifcapreq { 862 char ifcr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 863 uint64_t ifcr_capabilities; /* supported capabiliites */ 864 uint64_t ifcr_capenable; /* capabilities enabled */ 865 }; 866 867 struct ifaliasreq { 868 char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 869 struct sockaddr ifra_addr; 870 struct sockaddr ifra_dstaddr; 871 #define ifra_broadaddr ifra_dstaddr 872 struct sockaddr ifra_mask; 873 }; 874 875 struct ifdatareq { 876 char ifdr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 877 struct if_data ifdr_data; 878 }; 879 880 struct ifmediareq { 881 char ifm_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 882 int ifm_current; /* IFMWD: current media options */ 883 int ifm_mask; /* IFMWD: don't care mask */ 884 int ifm_status; /* media status */ 885 int ifm_active; /* IFMWD: active options */ 886 int ifm_count; /* # entries in ifm_ulist 887 array */ 888 int *ifm_ulist; /* array of ifmedia word */ 889 }; 890 891 892 struct ifdrv { 893 char ifd_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 894 unsigned long ifd_cmd; 895 size_t ifd_len; 896 void *ifd_data; 897 }; 898 #define IFLINKSTR_QUERYLEN 0x01 899 #define IFLINKSTR_UNSET 0x02 900 901 /* 902 * Structure used in SIOCGIFCONF request. 903 * Used to retrieve interface configuration 904 * for machine (useful for programs which 905 * must know all networks accessible). 906 */ 907 struct ifconf { 908 int ifc_len; /* size of associated buffer */ 909 union { 910 void * ifcu_buf; 911 struct ifreq *ifcu_req; 912 } ifc_ifcu; 913 #define ifc_buf ifc_ifcu.ifcu_buf /* buffer address */ 914 #define ifc_req ifc_ifcu.ifcu_req /* array of structures returned */ 915 }; 916 917 /* 918 * Structure for SIOC[AGD]LIFADDR 919 */ 920 struct if_laddrreq { 921 char iflr_name[IFNAMSIZ]; 922 unsigned int flags; 923 #define IFLR_PREFIX 0x8000 /* in: prefix given out: kernel fills id */ 924 #define IFLR_ACTIVE 0x4000 /* in/out: link-layer address activation */ 925 #define IFLR_FACTORY 0x2000 /* in/out: factory link-layer address */ 926 unsigned int prefixlen; /* in/out */ 927 struct sockaddr_storage addr; /* in/out */ 928 struct sockaddr_storage dstaddr; /* out */ 929 }; 930 931 /* 932 * Structure for SIOC[SG]IFADDRPREF 933 */ 934 struct if_addrprefreq { 935 char ifap_name[IFNAMSIZ]; 936 int16_t ifap_preference; /* in/out */ 937 struct sockaddr_storage ifap_addr; /* in/out */ 938 }; 939 940 #include <net/if_arp.h> 941 942 #endif /* _NETBSD_SOURCE */ 943 944 #ifdef _KERNEL 945 #ifdef ALTQ 946 #define IFQ_ENQUEUE(ifq, m, err) \ 947 do { \ 948 mutex_enter((ifq)->ifq_lock); \ 949 if (ALTQ_IS_ENABLED(ifq)) \ 950 ALTQ_ENQUEUE((ifq), (m), (err)); \ 951 else { \ 952 if (IF_QFULL(ifq)) { \ 953 m_freem(m); \ 954 (err) = ENOBUFS; \ 955 } else { \ 956 IF_ENQUEUE((ifq), (m)); \ 957 (err) = 0; \ 958 } \ 959 } \ 960 if ((err)) \ 961 (ifq)->ifq_drops++; \ 962 mutex_exit((ifq)->ifq_lock); \ 963 } while (/*CONSTCOND*/ 0) 964 965 #define IFQ_DEQUEUE(ifq, m) \ 966 do { \ 967 mutex_enter((ifq)->ifq_lock); \ 968 if (TBR_IS_ENABLED(ifq)) \ 969 (m) = tbr_dequeue((ifq), ALTDQ_REMOVE); \ 970 else if (ALTQ_IS_ENABLED(ifq)) \ 971 ALTQ_DEQUEUE((ifq), (m)); \ 972 else \ 973 IF_DEQUEUE((ifq), (m)); \ 974 mutex_exit((ifq)->ifq_lock); \ 975 } while (/*CONSTCOND*/ 0) 976 977 #define IFQ_POLL(ifq, m) \ 978 do { \ 979 mutex_enter((ifq)->ifq_lock); \ 980 if (TBR_IS_ENABLED(ifq)) \ 981 (m) = tbr_dequeue((ifq), ALTDQ_POLL); \ 982 else if (ALTQ_IS_ENABLED(ifq)) \ 983 ALTQ_POLL((ifq), (m)); \ 984 else \ 985 IF_POLL((ifq), (m)); \ 986 mutex_exit((ifq)->ifq_lock); \ 987 } while (/*CONSTCOND*/ 0) 988 989 #define IFQ_PURGE(ifq) \ 990 do { \ 991 mutex_enter((ifq)->ifq_lock); \ 992 if (ALTQ_IS_ENABLED(ifq)) \ 993 ALTQ_PURGE(ifq); \ 994 else \ 995 IF_PURGE(ifq); \ 996 mutex_exit((ifq)->ifq_lock); \ 997 } while (/*CONSTCOND*/ 0) 998 999 #define IFQ_SET_READY(ifq) \ 1000 do { \ 1001 (ifq)->altq_flags |= ALTQF_READY; \ 1002 } while (/*CONSTCOND*/ 0) 1003 1004 #define IFQ_CLASSIFY(ifq, m, af) \ 1005 do { \ 1006 KASSERT(((m)->m_flags & M_PKTHDR) != 0); \ 1007 mutex_enter((ifq)->ifq_lock); \ 1008 if (ALTQ_IS_ENABLED(ifq)) { \ 1009 if (ALTQ_NEEDS_CLASSIFY(ifq)) \ 1010 (m)->m_pkthdr.pattr_class = (*(ifq)->altq_classify) \ 1011 ((ifq)->altq_clfier, (m), (af)); \ 1012 (m)->m_pkthdr.pattr_af = (af); \ 1013 (m)->m_pkthdr.pattr_hdr = mtod((m), void *); \ 1014 } \ 1015 mutex_exit((ifq)->ifq_lock); \ 1016 } while (/*CONSTCOND*/ 0) 1017 #else /* ! ALTQ */ 1018 #define IFQ_ENQUEUE(ifq, m, err) \ 1019 do { \ 1020 mutex_enter((ifq)->ifq_lock); \ 1021 if (IF_QFULL(ifq)) { \ 1022 m_freem(m); \ 1023 (err) = ENOBUFS; \ 1024 } else { \ 1025 IF_ENQUEUE((ifq), (m)); \ 1026 (err) = 0; \ 1027 } \ 1028 if (err) \ 1029 (ifq)->ifq_drops++; \ 1030 mutex_exit((ifq)->ifq_lock); \ 1031 } while (/*CONSTCOND*/ 0) 1032 1033 #define IFQ_DEQUEUE(ifq, m) \ 1034 do { \ 1035 mutex_enter((ifq)->ifq_lock); \ 1036 IF_DEQUEUE((ifq), (m)); \ 1037 mutex_exit((ifq)->ifq_lock); \ 1038 } while (/*CONSTCOND*/ 0) 1039 1040 #define IFQ_POLL(ifq, m) \ 1041 do { \ 1042 mutex_enter((ifq)->ifq_lock); \ 1043 IF_POLL((ifq), (m)); \ 1044 mutex_exit((ifq)->ifq_lock); \ 1045 } while (/*CONSTCOND*/ 0) 1046 1047 #define IFQ_PURGE(ifq) \ 1048 do { \ 1049 mutex_enter((ifq)->ifq_lock); \ 1050 IF_PURGE(ifq); \ 1051 mutex_exit((ifq)->ifq_lock); \ 1052 } while (/*CONSTCOND*/ 0) 1053 1054 #define IFQ_SET_READY(ifq) /* nothing */ 1055 1056 #define IFQ_CLASSIFY(ifq, m, af) /* nothing */ 1057 1058 #endif /* ALTQ */ 1059 1060 #define IFQ_LOCK_INIT(ifq) (ifq)->ifq_lock = \ 1061 mutex_obj_alloc(MUTEX_DEFAULT, IPL_NET) 1062 #define IFQ_LOCK_DESTROY(ifq) mutex_obj_free((ifq)->ifq_lock) 1063 #define IFQ_LOCK(ifq) mutex_enter((ifq)->ifq_lock) 1064 #define IFQ_UNLOCK(ifq) mutex_exit((ifq)->ifq_lock) 1065 1066 #define IFQ_IS_EMPTY(ifq) IF_IS_EMPTY(ifq) 1067 #define IFQ_INC_LEN(ifq) ((ifq)->ifq_len++) 1068 #define IFQ_DEC_LEN(ifq) (--(ifq)->ifq_len) 1069 #define IFQ_INC_DROPS(ifq) ((ifq)->ifq_drops++) 1070 #define IFQ_SET_MAXLEN(ifq, len) ((ifq)->ifq_maxlen = (len)) 1071 1072 #include <sys/mallocvar.h> 1073 MALLOC_DECLARE(M_IFADDR); 1074 MALLOC_DECLARE(M_IFMADDR); 1075 1076 int ifreq_setaddr(u_long, struct ifreq *, const struct sockaddr *); 1077 1078 struct ifnet *if_alloc(u_char); 1079 void if_free(struct ifnet *); 1080 void if_initname(struct ifnet *, const char *, int); 1081 struct ifaddr *if_dl_create(const struct ifnet *, const struct sockaddr_dl **); 1082 void if_activate_sadl(struct ifnet *, struct ifaddr *, 1083 const struct sockaddr_dl *); 1084 void if_set_sadl(struct ifnet *, const void *, u_char, bool); 1085 void if_alloc_sadl(struct ifnet *); 1086 void if_free_sadl(struct ifnet *, int); 1087 int if_initialize(struct ifnet *); 1088 void if_register(struct ifnet *); 1089 int if_attach(struct ifnet *); /* Deprecated. Use if_initialize and if_register */ 1090 void if_attachdomain(void); 1091 void if_deactivate(struct ifnet *); 1092 bool if_is_deactivated(const struct ifnet *); 1093 void if_purgeaddrs(struct ifnet *, int, void (*)(struct ifaddr *)); 1094 void if_detach(struct ifnet *); 1095 void if_down(struct ifnet *); 1096 void if_down_locked(struct ifnet *); 1097 void if_link_state_change(struct ifnet *, int); 1098 void if_link_state_change_softint(struct ifnet *, int); 1099 void if_up(struct ifnet *); 1100 void ifinit(void); 1101 void ifinit1(void); 1102 void ifinit_post(void); 1103 int ifaddrpref_ioctl(struct socket *, u_long, void *, struct ifnet *); 1104 extern int (*ifioctl)(struct socket *, u_long, void *, struct lwp *); 1105 int ifioctl_common(struct ifnet *, u_long, void *); 1106 int ifpromisc(struct ifnet *, int); 1107 int ifpromisc_locked(struct ifnet *, int); 1108 int if_addr_init(ifnet_t *, struct ifaddr *, bool); 1109 int if_do_dad(struct ifnet *); 1110 int if_mcast_op(ifnet_t *, const unsigned long, const struct sockaddr *); 1111 int if_flags_set(struct ifnet *, const short); 1112 int if_clone_list(int, char *, int *); 1113 1114 struct ifnet *ifunit(const char *); 1115 struct ifnet *if_get(const char *, struct psref *); 1116 ifnet_t *if_byindex(u_int); 1117 ifnet_t *_if_byindex(u_int); 1118 ifnet_t *if_get_byindex(u_int, struct psref *); 1119 ifnet_t *if_get_bylla(const void *, unsigned char, struct psref *); 1120 void if_put(const struct ifnet *, struct psref *); 1121 void if_acquire(struct ifnet *, struct psref *); 1122 #define if_release if_put 1123 1124 int if_tunnel_check_nesting(struct ifnet *, struct mbuf *, int); 1125 1126 static __inline if_index_t 1127 if_get_index(const struct ifnet *ifp) 1128 { 1129 1130 return ifp != NULL ? ifp->if_index : 0; 1131 } 1132 1133 bool if_held(struct ifnet *); 1134 1135 void if_input(struct ifnet *, struct mbuf *); 1136 1137 struct if_percpuq * 1138 if_percpuq_create(struct ifnet *); 1139 void if_percpuq_destroy(struct if_percpuq *); 1140 void 1141 if_percpuq_enqueue(struct if_percpuq *, struct mbuf *); 1142 1143 void if_deferred_start_init(struct ifnet *, void (*)(struct ifnet *)); 1144 void if_schedule_deferred_start(struct ifnet *); 1145 1146 void ifa_insert(struct ifnet *, struct ifaddr *); 1147 void ifa_remove(struct ifnet *, struct ifaddr *); 1148 1149 void ifa_psref_init(struct ifaddr *); 1150 void ifa_acquire(struct ifaddr *, struct psref *); 1151 void ifa_release(struct ifaddr *, struct psref *); 1152 bool ifa_held(struct ifaddr *); 1153 bool ifa_is_destroying(struct ifaddr *); 1154 1155 void ifaref(struct ifaddr *); 1156 void ifafree(struct ifaddr *); 1157 1158 struct ifaddr *ifa_ifwithaddr(const struct sockaddr *); 1159 struct ifaddr *ifa_ifwithaddr_psref(const struct sockaddr *, struct psref *); 1160 struct ifaddr *ifa_ifwithaf(int); 1161 struct ifaddr *ifa_ifwithdstaddr(const struct sockaddr *); 1162 struct ifaddr *ifa_ifwithdstaddr_psref(const struct sockaddr *, 1163 struct psref *); 1164 struct ifaddr *ifa_ifwithnet(const struct sockaddr *); 1165 struct ifaddr *ifa_ifwithnet_psref(const struct sockaddr *, struct psref *); 1166 struct ifaddr *ifa_ifwithladdr(const struct sockaddr *); 1167 struct ifaddr *ifa_ifwithladdr_psref(const struct sockaddr *, struct psref *); 1168 struct ifaddr *ifaof_ifpforaddr(const struct sockaddr *, struct ifnet *); 1169 struct ifaddr *ifaof_ifpforaddr_psref(const struct sockaddr *, struct ifnet *, 1170 struct psref *); 1171 void link_rtrequest(int, struct rtentry *, const struct rt_addrinfo *); 1172 void p2p_rtrequest(int, struct rtentry *, const struct rt_addrinfo *); 1173 1174 void if_clone_attach(struct if_clone *); 1175 void if_clone_detach(struct if_clone *); 1176 1177 int if_transmit_lock(struct ifnet *, struct mbuf *); 1178 1179 int ifq_enqueue(struct ifnet *, struct mbuf *); 1180 int ifq_enqueue2(struct ifnet *, struct ifqueue *, struct mbuf *); 1181 1182 int loioctl(struct ifnet *, u_long, void *); 1183 void loopattach(int); 1184 void loopinit(void); 1185 int looutput(struct ifnet *, 1186 struct mbuf *, const struct sockaddr *, const struct rtentry *); 1187 1188 /* 1189 * These are exported because they're an easy way to tell if 1190 * an interface is going away without having to burn a flag. 1191 */ 1192 int if_nulloutput(struct ifnet *, struct mbuf *, 1193 const struct sockaddr *, const struct rtentry *); 1194 void if_nullinput(struct ifnet *, struct mbuf *); 1195 void if_nullstart(struct ifnet *); 1196 int if_nulltransmit(struct ifnet *, struct mbuf *); 1197 int if_nullioctl(struct ifnet *, u_long, void *); 1198 int if_nullinit(struct ifnet *); 1199 void if_nullstop(struct ifnet *, int); 1200 void if_nullslowtimo(struct ifnet *); 1201 #define if_nullwatchdog if_nullslowtimo 1202 void if_nulldrain(struct ifnet *); 1203 #else 1204 struct if_nameindex { 1205 unsigned int if_index; /* 1, 2, ... */ 1206 char *if_name; /* null terminated name: "le0", ... */ 1207 }; 1208 1209 #include <sys/cdefs.h> 1210 __BEGIN_DECLS 1211 unsigned int if_nametoindex(const char *); 1212 char * if_indextoname(unsigned int, char *); 1213 struct if_nameindex * if_nameindex(void); 1214 void if_freenameindex(struct if_nameindex *); 1215 __END_DECLS 1216 #endif /* _KERNEL */ /* XXX really ALTQ? */ 1217 1218 #ifdef _KERNEL 1219 1220 #define IFADDR_FIRST(__ifp) TAILQ_FIRST(&(__ifp)->if_addrlist) 1221 #define IFADDR_NEXT(__ifa) TAILQ_NEXT((__ifa), ifa_list) 1222 #define IFADDR_FOREACH(__ifa, __ifp) TAILQ_FOREACH(__ifa, \ 1223 &(__ifp)->if_addrlist, ifa_list) 1224 #define IFADDR_FOREACH_SAFE(__ifa, __ifp, __nifa) \ 1225 TAILQ_FOREACH_SAFE(__ifa, \ 1226 &(__ifp)->if_addrlist, ifa_list, __nifa) 1227 #define IFADDR_EMPTY(__ifp) TAILQ_EMPTY(&(__ifp)->if_addrlist) 1228 1229 #define IFADDR_ENTRY_INIT(__ifa) \ 1230 PSLIST_ENTRY_INIT((__ifa), ifa_pslist_entry) 1231 #define IFADDR_ENTRY_DESTROY(__ifa) \ 1232 PSLIST_ENTRY_DESTROY((__ifa), ifa_pslist_entry) 1233 #define IFADDR_READER_EMPTY(__ifp) \ 1234 (PSLIST_READER_FIRST(&(__ifp)->if_addr_pslist, struct ifaddr, \ 1235 ifa_pslist_entry) == NULL) 1236 #define IFADDR_READER_FIRST(__ifp) \ 1237 PSLIST_READER_FIRST(&(__ifp)->if_addr_pslist, struct ifaddr, \ 1238 ifa_pslist_entry) 1239 #define IFADDR_READER_NEXT(__ifa) \ 1240 PSLIST_READER_NEXT((__ifa), struct ifaddr, ifa_pslist_entry) 1241 #define IFADDR_READER_FOREACH(__ifa, __ifp) \ 1242 PSLIST_READER_FOREACH((__ifa), &(__ifp)->if_addr_pslist, struct ifaddr,\ 1243 ifa_pslist_entry) 1244 #define IFADDR_WRITER_INSERT_HEAD(__ifp, __ifa) \ 1245 PSLIST_WRITER_INSERT_HEAD(&(__ifp)->if_addr_pslist, (__ifa), \ 1246 ifa_pslist_entry) 1247 #define IFADDR_WRITER_REMOVE(__ifa) \ 1248 PSLIST_WRITER_REMOVE((__ifa), ifa_pslist_entry) 1249 #define IFADDR_WRITER_FOREACH(__ifa, __ifp) \ 1250 PSLIST_WRITER_FOREACH((__ifa), &(__ifp)->if_addr_pslist, struct ifaddr,\ 1251 ifa_pslist_entry) 1252 #define IFADDR_WRITER_NEXT(__ifp) \ 1253 PSLIST_WRITER_NEXT((__ifp), struct ifaddr, ifa_pslist_entry) 1254 #define IFADDR_WRITER_INSERT_AFTER(__ifp, __new) \ 1255 PSLIST_WRITER_INSERT_AFTER((__ifp), (__new), ifa_pslist_entry) 1256 #define IFADDR_WRITER_EMPTY(__ifp) \ 1257 (PSLIST_WRITER_FIRST(&(__ifp)->if_addr_pslist, struct ifaddr, \ 1258 ifa_pslist_entry) == NULL) 1259 #define IFADDR_WRITER_INSERT_TAIL(__ifp, __new) \ 1260 do { \ 1261 if (IFADDR_WRITER_EMPTY(__ifp)) { \ 1262 IFADDR_WRITER_INSERT_HEAD((__ifp), (__new)); \ 1263 } else { \ 1264 struct ifaddr *__ifa; \ 1265 IFADDR_WRITER_FOREACH(__ifa, (__ifp)) { \ 1266 if (IFADDR_WRITER_NEXT(__ifa) == NULL) {\ 1267 IFADDR_WRITER_INSERT_AFTER(__ifa,\ 1268 (__new)); \ 1269 break; \ 1270 } \ 1271 } \ 1272 } \ 1273 } while (0) 1274 1275 #define IFNET_GLOBAL_LOCK() mutex_enter(&ifnet_mtx) 1276 #define IFNET_GLOBAL_UNLOCK() mutex_exit(&ifnet_mtx) 1277 #define IFNET_GLOBAL_LOCKED() mutex_owned(&ifnet_mtx) 1278 1279 #define IFNET_READER_EMPTY() \ 1280 (PSLIST_READER_FIRST(&ifnet_pslist, struct ifnet, if_pslist_entry) == NULL) 1281 #define IFNET_READER_FIRST() \ 1282 PSLIST_READER_FIRST(&ifnet_pslist, struct ifnet, if_pslist_entry) 1283 #define IFNET_READER_NEXT(__ifp) \ 1284 PSLIST_READER_NEXT((__ifp), struct ifnet, if_pslist_entry) 1285 #define IFNET_READER_FOREACH(__ifp) \ 1286 PSLIST_READER_FOREACH((__ifp), &ifnet_pslist, struct ifnet, \ 1287 if_pslist_entry) 1288 #define IFNET_WRITER_INSERT_HEAD(__ifp) \ 1289 PSLIST_WRITER_INSERT_HEAD(&ifnet_pslist, (__ifp), if_pslist_entry) 1290 #define IFNET_WRITER_REMOVE(__ifp) \ 1291 PSLIST_WRITER_REMOVE((__ifp), if_pslist_entry) 1292 #define IFNET_WRITER_FOREACH(__ifp) \ 1293 PSLIST_WRITER_FOREACH((__ifp), &ifnet_pslist, struct ifnet, \ 1294 if_pslist_entry) 1295 #define IFNET_WRITER_NEXT(__ifp) \ 1296 PSLIST_WRITER_NEXT((__ifp), struct ifnet, if_pslist_entry) 1297 #define IFNET_WRITER_INSERT_AFTER(__ifp, __new) \ 1298 PSLIST_WRITER_INSERT_AFTER((__ifp), (__new), if_pslist_entry) 1299 #define IFNET_WRITER_EMPTY() \ 1300 (PSLIST_WRITER_FIRST(&ifnet_pslist, struct ifnet, if_pslist_entry) == NULL) 1301 #define IFNET_WRITER_INSERT_TAIL(__new) \ 1302 do { \ 1303 if (IFNET_WRITER_EMPTY()) { \ 1304 IFNET_WRITER_INSERT_HEAD(__new); \ 1305 } else { \ 1306 struct ifnet *__ifp; \ 1307 IFNET_WRITER_FOREACH(__ifp) { \ 1308 if (IFNET_WRITER_NEXT(__ifp) == NULL) { \ 1309 IFNET_WRITER_INSERT_AFTER(__ifp,\ 1310 (__new)); \ 1311 break; \ 1312 } \ 1313 } \ 1314 } \ 1315 } while (0) 1316 1317 #define IFNET_LOCK(ifp) mutex_enter((ifp)->if_ioctl_lock) 1318 #define IFNET_UNLOCK(ifp) mutex_exit((ifp)->if_ioctl_lock) 1319 #define IFNET_LOCKED(ifp) mutex_owned((ifp)->if_ioctl_lock) 1320 1321 #define IFNET_ASSERT_UNLOCKED(ifp) \ 1322 KDASSERT(mutex_ownable((ifp)->if_ioctl_lock)) 1323 1324 extern struct pslist_head ifnet_pslist; 1325 extern kmutex_t ifnet_mtx; 1326 1327 extern struct ifnet *lo0ifp; 1328 1329 /* 1330 * ifq sysctl support 1331 */ 1332 int sysctl_ifq(int *name, u_int namelen, void *oldp, 1333 size_t *oldlenp, void *newp, size_t newlen, 1334 struct ifqueue *ifq); 1335 /* symbolic names for terminal (per-protocol) CTL_IFQ_ nodes */ 1336 #define IFQCTL_LEN 1 1337 #define IFQCTL_MAXLEN 2 1338 #define IFQCTL_PEAK 3 1339 #define IFQCTL_DROPS 4 1340 1341 /* 1342 * Hook for if_vlan - needed by if_agr 1343 */ 1344 MODULE_HOOK(if_vlan_vlan_input_hook, void, (struct ifnet *, struct mbuf *)); 1345 1346 #endif /* _KERNEL */ 1347 1348 #endif /* !_NET_IF_H_ */ 1349
Indexes created Thu Sep 25 16:09:42 GMT 2025