if.h revision 1.274.2.1
1 /* $NetBSD: if.h,v 1.274.2.1 2019/09/24 03:10:35 martin 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 */ 343 344 /* 345 * pf specific data, used only when #if NPF > 0. 346 */ 347 void *if_pf_kif; /* ?: pf interface abstraction */ 348 void *if_pf_groups; /* ?: pf interface groups */ 349 /* 350 * During an ifnet's lifetime, it has only one if_index, but 351 * and if_index is not sufficient to identify an ifnet 352 * because during the lifetime of the system, many ifnets may occupy a 353 * given if_index. Let us tell different ifnets at the same 354 * if_index apart by their if_index_gen, a unique number that each ifnet 355 * is assigned when it if_attach()s. Now, the kernel can use the 356 * pair (if_index, if_index_gen) as a weak reference to an ifnet. 357 */ 358 uint64_t if_index_gen; /* :: generation number for the ifnet 359 * at if_index: if two ifnets' index 360 * and generation number are both the 361 * same, they are the same ifnet. 362 */ 363 struct sysctllog 364 *if_sysctl_log; /* :: */ 365 int (*if_initaddr) /* :: */ 366 (struct ifnet *, struct ifaddr *, bool); 367 int (*if_mcastop) /* :: */ 368 (struct ifnet *, const unsigned long, 369 const struct sockaddr *); 370 int (*if_setflags) /* :: */ 371 (struct ifnet *, const short); 372 kmutex_t *if_ioctl_lock; /* :: */ 373 char *if_description; /* i: interface description */ 374 #ifdef _KERNEL /* XXX kvm(3) */ 375 struct callout *if_slowtimo_ch;/* :: */ 376 struct krwlock *if_afdata_lock;/* :: */ 377 struct if_percpuq 378 *if_percpuq; /* :: we should remove it in the future */ 379 void *if_link_si; /* :: softint to handle link state changes */ 380 uint16_t if_link_queue; /* q: masked link state change queue */ 381 struct pslist_entry 382 if_pslist_entry;/* i: */ 383 struct psref_target 384 if_psref; /* :: */ 385 struct pslist_head 386 if_addr_pslist; /* i: */ 387 struct if_deferred_start 388 *if_deferred_start; 389 /* :: */ 390 /* XXX should be protocol independent */ 391 LIST_HEAD(, in6_multi) 392 if_multiaddrs; /* 6: */ 393 #endif 394 } ifnet_t; 395 396 #define if_mtu if_data.ifi_mtu 397 #define if_type if_data.ifi_type 398 #define if_addrlen if_data.ifi_addrlen 399 #define if_hdrlen if_data.ifi_hdrlen 400 #define if_metric if_data.ifi_metric 401 #define if_link_state if_data.ifi_link_state 402 #define if_baudrate if_data.ifi_baudrate 403 #define if_ipackets if_data.ifi_ipackets 404 #define if_ierrors if_data.ifi_ierrors 405 #define if_opackets if_data.ifi_opackets 406 #define if_oerrors if_data.ifi_oerrors 407 #define if_collisions if_data.ifi_collisions 408 #define if_ibytes if_data.ifi_ibytes 409 #define if_obytes if_data.ifi_obytes 410 #define if_imcasts if_data.ifi_imcasts 411 #define if_omcasts if_data.ifi_omcasts 412 #define if_iqdrops if_data.ifi_iqdrops 413 #define if_noproto if_data.ifi_noproto 414 #define if_lastchange if_data.ifi_lastchange 415 #define if_name(ifp) ((ifp)->if_xname) 416 417 #define IFF_UP 0x0001 /* interface is up */ 418 #define IFF_BROADCAST 0x0002 /* broadcast address valid */ 419 #define IFF_DEBUG 0x0004 /* turn on debugging */ 420 #define IFF_LOOPBACK 0x0008 /* is a loopback net */ 421 #define IFF_POINTOPOINT 0x0010 /* interface is point-to-point link */ 422 /* 0x0020 was IFF_NOTRAILERS */ 423 #define IFF_RUNNING 0x0040 /* resources allocated */ 424 #define IFF_NOARP 0x0080 /* no address resolution protocol */ 425 #define IFF_PROMISC 0x0100 /* receive all packets */ 426 #define IFF_ALLMULTI 0x0200 /* receive all multicast packets */ 427 #define IFF_OACTIVE 0x0400 /* transmission in progress */ 428 #define IFF_SIMPLEX 0x0800 /* can't hear own transmissions */ 429 #define IFF_LINK0 0x1000 /* per link layer defined bit */ 430 #define IFF_LINK1 0x2000 /* per link layer defined bit */ 431 #define IFF_LINK2 0x4000 /* per link layer defined bit */ 432 #define IFF_MULTICAST 0x8000 /* supports multicast */ 433 434 #define IFEF_MPSAFE __BIT(0) /* handlers can run in parallel (see below) */ 435 #define IFEF_NO_LINK_STATE_CHANGE __BIT(1) /* doesn't use link state interrupts */ 436 437 /* 438 * The guidelines for converting an interface to IFEF_MPSAFE are as follows 439 * 440 * Enabling IFEF_MPSAFE on an interface suppresses taking KERNEL_LOCK when 441 * calling the following handlers: 442 * - if_start 443 * - Note that if_transmit is always called without KERNEL_LOCK 444 * - if_output 445 * - if_ioctl 446 * - if_init 447 * - if_stop 448 * 449 * This means that an interface with IFEF_MPSAFE must make the above handlers 450 * MP-safe or take KERNEL_LOCK by itself inside handlers that aren't MP-safe 451 * yet. 452 * 453 * There are some additional restrictions to access member variables of struct 454 * ifnet: 455 * - if_flags 456 * - Must be updated with holding IFNET_LOCK 457 * - You cannot use the flag in Tx/Rx paths anymore because there is no 458 * synchronization on the flag except for IFNET_LOCK 459 * - Note that IFNET_LOCK can't be taken in softint because it's known 460 * that it causes a deadlock 461 * - Some synchronization mechanisms such as pserialize_perform are called 462 * with IFNET_LOCK and also require context switches on every CPUs 463 * that mean softints finish so trying to take IFNET_LOCK in softint 464 * might block on IFNET_LOCK and prevent such synchronization mechanisms 465 * from being completed 466 * - Currently the deadlock occurs only if NET_MPSAFE is enabled, however, 467 * we should deal with the restriction because NET_MPSAFE will be enabled 468 * by default in the future 469 * - if_watchdog and if_timer 470 * - The watchdog framework works only for non-IFEF_MPSAFE interfaces 471 * that rely on KERNEL_LOCK 472 * - Interfaces with IFEF_MPSAFE have to provide its own watchdog mechanism 473 * if needed 474 * - Keep if_watchdog NULL when calling if_attach 475 */ 476 477 #ifdef _KERNEL 478 static __inline bool 479 if_is_mpsafe(struct ifnet *ifp) 480 { 481 482 return ((ifp->if_extflags & IFEF_MPSAFE) != 0); 483 } 484 485 static __inline int 486 if_output_lock(struct ifnet *cifp, struct ifnet *ifp, struct mbuf *m, 487 const struct sockaddr *dst, const struct rtentry *rt) 488 { 489 490 if (if_is_mpsafe(cifp)) { 491 return (*cifp->if_output)(ifp, m, dst, rt); 492 } else { 493 int ret; 494 495 KERNEL_LOCK(1, NULL); 496 ret = (*cifp->if_output)(ifp, m, dst, rt); 497 KERNEL_UNLOCK_ONE(NULL); 498 return ret; 499 } 500 } 501 502 static __inline void 503 if_start_lock(struct ifnet *ifp) 504 { 505 506 if (if_is_mpsafe(ifp)) { 507 (*ifp->if_start)(ifp); 508 } else { 509 KERNEL_LOCK(1, NULL); 510 (*ifp->if_start)(ifp); 511 KERNEL_UNLOCK_ONE(NULL); 512 } 513 } 514 515 static __inline bool 516 if_is_link_state_changeable(struct ifnet *ifp) 517 { 518 519 return ((ifp->if_extflags & IFEF_NO_LINK_STATE_CHANGE) == 0); 520 } 521 522 #define KERNEL_LOCK_IF_IFP_MPSAFE(ifp) \ 523 do { if (if_is_mpsafe(ifp)) { KERNEL_LOCK(1, NULL); } } while (0) 524 #define KERNEL_UNLOCK_IF_IFP_MPSAFE(ifp) \ 525 do { if (if_is_mpsafe(ifp)) { KERNEL_UNLOCK_ONE(NULL); } } while (0) 526 527 #define KERNEL_LOCK_UNLESS_IFP_MPSAFE(ifp) \ 528 do { if (!if_is_mpsafe(ifp)) { KERNEL_LOCK(1, NULL); } } while (0) 529 #define KERNEL_UNLOCK_UNLESS_IFP_MPSAFE(ifp) \ 530 do { if (!if_is_mpsafe(ifp)) { KERNEL_UNLOCK_ONE(NULL); } } while (0) 531 532 #ifdef _KERNEL_OPT 533 #include "opt_net_mpsafe.h" 534 #endif 535 536 /* XXX explore a better place to define */ 537 #ifdef NET_MPSAFE 538 539 #define KERNEL_LOCK_UNLESS_NET_MPSAFE() do { } while (0) 540 #define KERNEL_UNLOCK_UNLESS_NET_MPSAFE() do { } while (0) 541 542 #define SOFTNET_LOCK_UNLESS_NET_MPSAFE() do { } while (0) 543 #define SOFTNET_UNLOCK_UNLESS_NET_MPSAFE() do { } while (0) 544 545 #define SOFTNET_LOCK_IF_NET_MPSAFE() \ 546 do { mutex_enter(softnet_lock); } while (0) 547 #define SOFTNET_UNLOCK_IF_NET_MPSAFE() \ 548 do { mutex_exit(softnet_lock); } while (0) 549 550 #else /* NET_MPSAFE */ 551 552 #define KERNEL_LOCK_UNLESS_NET_MPSAFE() \ 553 do { KERNEL_LOCK(1, NULL); } while (0) 554 #define KERNEL_UNLOCK_UNLESS_NET_MPSAFE() \ 555 do { KERNEL_UNLOCK_ONE(NULL); } while (0) 556 557 #define SOFTNET_LOCK_UNLESS_NET_MPSAFE() \ 558 do { mutex_enter(softnet_lock); } while (0) 559 #define SOFTNET_UNLOCK_UNLESS_NET_MPSAFE() \ 560 do { mutex_exit(softnet_lock); } while (0) 561 562 #define SOFTNET_LOCK_IF_NET_MPSAFE() do { } while (0) 563 #define SOFTNET_UNLOCK_IF_NET_MPSAFE() do { } while (0) 564 565 #endif /* NET_MPSAFE */ 566 567 #define SOFTNET_KERNEL_LOCK_UNLESS_NET_MPSAFE() \ 568 do { \ 569 SOFTNET_LOCK_UNLESS_NET_MPSAFE(); \ 570 KERNEL_LOCK_UNLESS_NET_MPSAFE(); \ 571 } while (0) 572 573 #define SOFTNET_KERNEL_UNLOCK_UNLESS_NET_MPSAFE() \ 574 do { \ 575 KERNEL_UNLOCK_UNLESS_NET_MPSAFE(); \ 576 SOFTNET_UNLOCK_UNLESS_NET_MPSAFE(); \ 577 } while (0) 578 579 #endif /* _KERNEL */ 580 581 #define IFFBITS \ 582 "\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT" \ 583 "\7RUNNING\10NOARP\11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX" \ 584 "\15LINK0\16LINK1\17LINK2\20MULTICAST" 585 586 /* flags set internally only: */ 587 #define IFF_CANTCHANGE \ 588 (IFF_BROADCAST|IFF_POINTOPOINT|IFF_RUNNING|IFF_OACTIVE|\ 589 IFF_SIMPLEX|IFF_MULTICAST|IFF_ALLMULTI|IFF_PROMISC) 590 591 /* 592 * Some convenience macros used for setting ifi_baudrate. 593 */ 594 #define IF_Kbps(x) ((x) * 1000ULL) /* kilobits/sec. */ 595 #define IF_Mbps(x) (IF_Kbps((x) * 1000ULL)) /* megabits/sec. */ 596 #define IF_Gbps(x) (IF_Mbps((x) * 1000ULL)) /* gigabits/sec. */ 597 598 /* Capabilities that interfaces can advertise. */ 599 /* 0x01 .. 0x40 were previously used */ 600 #define IFCAP_TSOv4 0x00080 /* can do TCPv4 segmentation offload */ 601 #define IFCAP_CSUM_IPv4_Rx 0x00100 /* can do IPv4 header checksums (Rx) */ 602 #define IFCAP_CSUM_IPv4_Tx 0x00200 /* can do IPv4 header checksums (Tx) */ 603 #define IFCAP_CSUM_TCPv4_Rx 0x00400 /* can do IPv4/TCP checksums (Rx) */ 604 #define IFCAP_CSUM_TCPv4_Tx 0x00800 /* can do IPv4/TCP checksums (Tx) */ 605 #define IFCAP_CSUM_UDPv4_Rx 0x01000 /* can do IPv4/UDP checksums (Rx) */ 606 #define IFCAP_CSUM_UDPv4_Tx 0x02000 /* can do IPv4/UDP checksums (Tx) */ 607 #define IFCAP_CSUM_TCPv6_Rx 0x04000 /* can do IPv6/TCP checksums (Rx) */ 608 #define IFCAP_CSUM_TCPv6_Tx 0x08000 /* can do IPv6/TCP checksums (Tx) */ 609 #define IFCAP_CSUM_UDPv6_Rx 0x10000 /* can do IPv6/UDP checksums (Rx) */ 610 #define IFCAP_CSUM_UDPv6_Tx 0x20000 /* can do IPv6/UDP checksums (Tx) */ 611 #define IFCAP_TSOv6 0x40000 /* can do TCPv6 segmentation offload */ 612 #define IFCAP_LRO 0x80000 /* can do Large Receive Offload */ 613 #define IFCAP_MASK 0xfff80 /* currently valid capabilities */ 614 615 #define IFCAPBITS \ 616 "\020" \ 617 "\10TSO4" \ 618 "\11IP4CSUM_Rx" \ 619 "\12IP4CSUM_Tx" \ 620 "\13TCP4CSUM_Rx" \ 621 "\14TCP4CSUM_Tx" \ 622 "\15UDP4CSUM_Rx" \ 623 "\16UDP4CSUM_Tx" \ 624 "\17TCP6CSUM_Rx" \ 625 "\20TCP6CSUM_Tx" \ 626 "\21UDP6CSUM_Rx" \ 627 "\22UDP6CSUM_Tx" \ 628 "\23TSO6" \ 629 "\24LRO" \ 630 631 #define IF_AFDATA_LOCK_INIT(ifp) \ 632 do {(ifp)->if_afdata_lock = rw_obj_alloc();} while (0) 633 634 #define IF_AFDATA_LOCK_DESTROY(ifp) rw_obj_free((ifp)->if_afdata_lock) 635 636 #define IF_AFDATA_WLOCK(ifp) rw_enter((ifp)->if_afdata_lock, RW_WRITER) 637 #define IF_AFDATA_RLOCK(ifp) rw_enter((ifp)->if_afdata_lock, RW_READER) 638 #define IF_AFDATA_WUNLOCK(ifp) rw_exit((ifp)->if_afdata_lock) 639 #define IF_AFDATA_RUNLOCK(ifp) rw_exit((ifp)->if_afdata_lock) 640 #define IF_AFDATA_LOCK(ifp) IF_AFDATA_WLOCK(ifp) 641 #define IF_AFDATA_UNLOCK(ifp) IF_AFDATA_WUNLOCK(ifp) 642 #define IF_AFDATA_TRYLOCK(ifp) rw_tryenter((ifp)->if_afdata_lock, RW_WRITER) 643 644 #define IF_AFDATA_LOCK_ASSERT(ifp) \ 645 KASSERT(rw_lock_held((ifp)->if_afdata_lock)) 646 #define IF_AFDATA_RLOCK_ASSERT(ifp) \ 647 KASSERT(rw_read_held((ifp)->if_afdata_lock)) 648 #define IF_AFDATA_WLOCK_ASSERT(ifp) \ 649 KASSERT(rw_write_held((ifp)->if_afdata_lock)) 650 651 /* 652 * Output queues (ifp->if_snd) and internetwork datagram level (pup level 1) 653 * input routines have queues of messages stored on ifqueue structures 654 * (defined above). Entries are added to and deleted from these structures 655 * by these macros, which should be called with ipl raised to splnet(). 656 */ 657 #define IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen) 658 #define IF_DROP(ifq) ((ifq)->ifq_drops++) 659 #define IF_ENQUEUE(ifq, m) do { \ 660 (m)->m_nextpkt = 0; \ 661 if ((ifq)->ifq_tail == 0) \ 662 (ifq)->ifq_head = m; \ 663 else \ 664 (ifq)->ifq_tail->m_nextpkt = m; \ 665 (ifq)->ifq_tail = m; \ 666 (ifq)->ifq_len++; \ 667 } while (/*CONSTCOND*/0) 668 #define IF_PREPEND(ifq, m) do { \ 669 (m)->m_nextpkt = (ifq)->ifq_head; \ 670 if ((ifq)->ifq_tail == 0) \ 671 (ifq)->ifq_tail = (m); \ 672 (ifq)->ifq_head = (m); \ 673 (ifq)->ifq_len++; \ 674 } while (/*CONSTCOND*/0) 675 #define IF_DEQUEUE(ifq, m) do { \ 676 (m) = (ifq)->ifq_head; \ 677 if (m) { \ 678 if (((ifq)->ifq_head = (m)->m_nextpkt) == 0) \ 679 (ifq)->ifq_tail = 0; \ 680 (m)->m_nextpkt = 0; \ 681 (ifq)->ifq_len--; \ 682 } \ 683 } while (/*CONSTCOND*/0) 684 #define IF_POLL(ifq, m) ((m) = (ifq)->ifq_head) 685 #define IF_PURGE(ifq) \ 686 do { \ 687 struct mbuf *__m0; \ 688 \ 689 for (;;) { \ 690 IF_DEQUEUE((ifq), __m0); \ 691 if (__m0 == NULL) \ 692 break; \ 693 else \ 694 m_freem(__m0); \ 695 } \ 696 } while (/*CONSTCOND*/ 0) 697 #define IF_IS_EMPTY(ifq) ((ifq)->ifq_len == 0) 698 699 #ifndef IFQ_MAXLEN 700 #define IFQ_MAXLEN 256 701 #endif 702 #define IFNET_SLOWHZ 1 /* granularity is 1 second */ 703 704 /* 705 * Structure defining statistics and other data kept regarding an address 706 * on a network interface. 707 */ 708 struct ifaddr_data { 709 int64_t ifad_inbytes; 710 int64_t ifad_outbytes; 711 }; 712 713 /* 714 * The ifaddr structure contains information about one address 715 * of an interface. They are maintained by the different address families, 716 * are allocated and attached when an address is set, and are linked 717 * together so all addresses for an interface can be located. 718 */ 719 struct ifaddr { 720 struct sockaddr *ifa_addr; /* address of interface */ 721 struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */ 722 #define ifa_broadaddr ifa_dstaddr /* broadcast address interface */ 723 struct sockaddr *ifa_netmask; /* used to determine subnet */ 724 struct ifnet *ifa_ifp; /* back-pointer to interface */ 725 TAILQ_ENTRY(ifaddr) ifa_list; /* list of addresses for interface */ 726 struct ifaddr_data ifa_data; /* statistics on the address */ 727 void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */ 728 (int, struct rtentry *, const struct rt_addrinfo *); 729 u_int ifa_flags; /* mostly rt_flags for cloning */ 730 int ifa_refcnt; /* count of references */ 731 int ifa_metric; /* cost of going out this interface */ 732 struct ifaddr *(*ifa_getifa)(struct ifaddr *, 733 const struct sockaddr *); 734 uint32_t *ifa_seqno; 735 int16_t ifa_preference; /* preference level for this address */ 736 #ifdef _KERNEL 737 struct pslist_entry ifa_pslist_entry; 738 struct psref_target ifa_psref; 739 #endif 740 }; 741 #define IFA_ROUTE RTF_UP /* (0x01) route installed */ 742 #define IFA_DESTROYING 0x2 743 744 /* 745 * Message format for use in obtaining information about interfaces from 746 * sysctl and the routing socket. We need to force 64-bit alignment if we 747 * aren't using compatiblity definitons. 748 */ 749 #if !defined(_KERNEL) || !defined(COMPAT_RTSOCK) 750 #define __align64 __aligned(sizeof(uint64_t)) 751 #else 752 #define __align64 753 #endif 754 struct if_msghdr { 755 u_short ifm_msglen __align64; 756 /* to skip over non-understood messages */ 757 u_char ifm_version; /* future binary compatibility */ 758 u_char ifm_type; /* message type */ 759 int ifm_addrs; /* like rtm_addrs */ 760 int ifm_flags; /* value of if_flags */ 761 u_short ifm_index; /* index for associated ifp */ 762 struct if_data ifm_data __align64; 763 /* statistics and other data about if */ 764 }; 765 766 /* 767 * Message format for use in obtaining information about interface addresses 768 * from sysctl and the routing socket. 769 */ 770 struct ifa_msghdr { 771 u_short ifam_msglen __align64; 772 /* to skip over non-understood messages */ 773 u_char ifam_version; /* future binary compatibility */ 774 u_char ifam_type; /* message type */ 775 u_short ifam_index; /* index for associated ifp */ 776 int ifam_flags; /* value of ifa_flags */ 777 int ifam_addrs; /* like rtm_addrs */ 778 pid_t ifam_pid; /* identify sender */ 779 int ifam_addrflags; /* family specific address flags */ 780 int ifam_metric; /* value of ifa_metric */ 781 }; 782 783 /* 784 * Message format announcing the arrival or departure of a network interface. 785 */ 786 struct if_announcemsghdr { 787 u_short ifan_msglen __align64; 788 /* to skip over non-understood messages */ 789 u_char ifan_version; /* future binary compatibility */ 790 u_char ifan_type; /* message type */ 791 u_short ifan_index; /* index for associated ifp */ 792 char ifan_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 793 u_short ifan_what; /* what type of announcement */ 794 }; 795 796 #define IFAN_ARRIVAL 0 /* interface arrival */ 797 #define IFAN_DEPARTURE 1 /* interface departure */ 798 799 #undef __align64 800 801 /* 802 * Interface request structure used for socket 803 * ioctl's. All interface ioctl's must have parameter 804 * definitions which begin with ifr_name. The 805 * remainder may be interface specific. 806 */ 807 struct ifreq { 808 char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 809 union { 810 struct sockaddr ifru_addr; 811 struct sockaddr ifru_dstaddr; 812 struct sockaddr ifru_broadaddr; 813 struct sockaddr_storage ifru_space; 814 short ifru_flags; 815 int ifru_addrflags; 816 int ifru_metric; 817 int ifru_mtu; 818 int ifru_dlt; 819 u_int ifru_value; 820 void * ifru_data; 821 struct { 822 uint32_t b_buflen; 823 void *b_buf; 824 } ifru_b; 825 } ifr_ifru; 826 #define ifr_addr ifr_ifru.ifru_addr /* address */ 827 #define ifr_dstaddr ifr_ifru.ifru_dstaddr /* other end of p-to-p link */ 828 #define ifr_broadaddr ifr_ifru.ifru_broadaddr /* broadcast address */ 829 #define ifr_space ifr_ifru.ifru_space /* sockaddr_storage */ 830 #define ifr_flags ifr_ifru.ifru_flags /* flags */ 831 #define ifr_addrflags ifr_ifru.ifru_addrflags /* addr flags */ 832 #define ifr_metric ifr_ifru.ifru_metric /* metric */ 833 #define ifr_mtu ifr_ifru.ifru_mtu /* mtu */ 834 #define ifr_dlt ifr_ifru.ifru_dlt /* data link type (DLT_*) */ 835 #define ifr_value ifr_ifru.ifru_value /* generic value */ 836 #define ifr_media ifr_ifru.ifru_metric /* media options (overload) */ 837 #define ifr_data ifr_ifru.ifru_data /* for use by interface 838 * XXX deprecated 839 */ 840 #define ifr_buf ifr_ifru.ifru_b.b_buf /* new interface ioctls */ 841 #define ifr_buflen ifr_ifru.ifru_b.b_buflen 842 #define ifr_index ifr_ifru.ifru_value /* interface index, BSD */ 843 #define ifr_ifindex ifr_index /* interface index, linux */ 844 }; 845 846 #ifdef _KERNEL 847 #define ifreq_setdstaddr ifreq_setaddr 848 #define ifreq_setbroadaddr ifreq_setaddr 849 #define ifreq_getdstaddr ifreq_getaddr 850 #define ifreq_getbroadaddr ifreq_getaddr 851 852 static __inline const struct sockaddr * 853 /*ARGSUSED*/ 854 ifreq_getaddr(u_long cmd, const struct ifreq *ifr) 855 { 856 return &ifr->ifr_addr; 857 } 858 #endif /* _KERNEL */ 859 860 struct ifcapreq { 861 char ifcr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 862 uint64_t ifcr_capabilities; /* supported capabiliites */ 863 uint64_t ifcr_capenable; /* capabilities enabled */ 864 }; 865 866 struct ifaliasreq { 867 char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 868 struct sockaddr ifra_addr; 869 struct sockaddr ifra_dstaddr; 870 #define ifra_broadaddr ifra_dstaddr 871 struct sockaddr ifra_mask; 872 }; 873 874 struct ifdatareq { 875 char ifdr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 876 struct if_data ifdr_data; 877 }; 878 879 struct ifmediareq { 880 char ifm_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 881 int ifm_current; /* IFMWD: current media options */ 882 int ifm_mask; /* IFMWD: don't care mask */ 883 int ifm_status; /* media status */ 884 int ifm_active; /* IFMWD: active options */ 885 int ifm_count; /* # entries in ifm_ulist 886 array */ 887 int *ifm_ulist; /* array of ifmedia word */ 888 }; 889 890 891 struct ifdrv { 892 char ifd_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 893 unsigned long ifd_cmd; 894 size_t ifd_len; 895 void *ifd_data; 896 }; 897 #define IFLINKSTR_QUERYLEN 0x01 898 #define IFLINKSTR_UNSET 0x02 899 900 /* 901 * Structure used in SIOCGIFCONF request. 902 * Used to retrieve interface configuration 903 * for machine (useful for programs which 904 * must know all networks accessible). 905 */ 906 struct ifconf { 907 int ifc_len; /* size of associated buffer */ 908 union { 909 void * ifcu_buf; 910 struct ifreq *ifcu_req; 911 } ifc_ifcu; 912 #define ifc_buf ifc_ifcu.ifcu_buf /* buffer address */ 913 #define ifc_req ifc_ifcu.ifcu_req /* array of structures returned */ 914 }; 915 916 /* 917 * Structure for SIOC[AGD]LIFADDR 918 */ 919 struct if_laddrreq { 920 char iflr_name[IFNAMSIZ]; 921 unsigned int flags; 922 #define IFLR_PREFIX 0x8000 /* in: prefix given out: kernel fills id */ 923 #define IFLR_ACTIVE 0x4000 /* in/out: link-layer address activation */ 924 #define IFLR_FACTORY 0x2000 /* in/out: factory link-layer address */ 925 unsigned int prefixlen; /* in/out */ 926 struct sockaddr_storage addr; /* in/out */ 927 struct sockaddr_storage dstaddr; /* out */ 928 }; 929 930 /* 931 * Structure for SIOC[SG]IFADDRPREF 932 */ 933 struct if_addrprefreq { 934 char ifap_name[IFNAMSIZ]; 935 int16_t ifap_preference; /* in/out */ 936 struct sockaddr_storage ifap_addr; /* in/out */ 937 }; 938 939 #include <net/if_arp.h> 940 941 #endif /* _NETBSD_SOURCE */ 942 943 #ifdef _KERNEL 944 #ifdef ALTQ 945 #define IFQ_ENQUEUE(ifq, m, err) \ 946 do { \ 947 mutex_enter((ifq)->ifq_lock); \ 948 if (ALTQ_IS_ENABLED(ifq)) \ 949 ALTQ_ENQUEUE((ifq), (m), (err)); \ 950 else { \ 951 if (IF_QFULL(ifq)) { \ 952 m_freem(m); \ 953 (err) = ENOBUFS; \ 954 } else { \ 955 IF_ENQUEUE((ifq), (m)); \ 956 (err) = 0; \ 957 } \ 958 } \ 959 if ((err)) \ 960 (ifq)->ifq_drops++; \ 961 mutex_exit((ifq)->ifq_lock); \ 962 } while (/*CONSTCOND*/ 0) 963 964 #define IFQ_DEQUEUE(ifq, m) \ 965 do { \ 966 mutex_enter((ifq)->ifq_lock); \ 967 if (TBR_IS_ENABLED(ifq)) \ 968 (m) = tbr_dequeue((ifq), ALTDQ_REMOVE); \ 969 else if (ALTQ_IS_ENABLED(ifq)) \ 970 ALTQ_DEQUEUE((ifq), (m)); \ 971 else \ 972 IF_DEQUEUE((ifq), (m)); \ 973 mutex_exit((ifq)->ifq_lock); \ 974 } while (/*CONSTCOND*/ 0) 975 976 #define IFQ_POLL(ifq, m) \ 977 do { \ 978 mutex_enter((ifq)->ifq_lock); \ 979 if (TBR_IS_ENABLED(ifq)) \ 980 (m) = tbr_dequeue((ifq), ALTDQ_POLL); \ 981 else if (ALTQ_IS_ENABLED(ifq)) \ 982 ALTQ_POLL((ifq), (m)); \ 983 else \ 984 IF_POLL((ifq), (m)); \ 985 mutex_exit((ifq)->ifq_lock); \ 986 } while (/*CONSTCOND*/ 0) 987 988 #define IFQ_PURGE(ifq) \ 989 do { \ 990 mutex_enter((ifq)->ifq_lock); \ 991 if (ALTQ_IS_ENABLED(ifq)) \ 992 ALTQ_PURGE(ifq); \ 993 else \ 994 IF_PURGE(ifq); \ 995 mutex_exit((ifq)->ifq_lock); \ 996 } while (/*CONSTCOND*/ 0) 997 998 #define IFQ_SET_READY(ifq) \ 999 do { \ 1000 (ifq)->altq_flags |= ALTQF_READY; \ 1001 } while (/*CONSTCOND*/ 0) 1002 1003 #define IFQ_CLASSIFY(ifq, m, af) \ 1004 do { \ 1005 KASSERT(((m)->m_flags & M_PKTHDR) != 0); \ 1006 mutex_enter((ifq)->ifq_lock); \ 1007 if (ALTQ_IS_ENABLED(ifq)) { \ 1008 if (ALTQ_NEEDS_CLASSIFY(ifq)) \ 1009 (m)->m_pkthdr.pattr_class = (*(ifq)->altq_classify) \ 1010 ((ifq)->altq_clfier, (m), (af)); \ 1011 (m)->m_pkthdr.pattr_af = (af); \ 1012 (m)->m_pkthdr.pattr_hdr = mtod((m), void *); \ 1013 } \ 1014 mutex_exit((ifq)->ifq_lock); \ 1015 } while (/*CONSTCOND*/ 0) 1016 #else /* ! ALTQ */ 1017 #define IFQ_ENQUEUE(ifq, m, err) \ 1018 do { \ 1019 mutex_enter((ifq)->ifq_lock); \ 1020 if (IF_QFULL(ifq)) { \ 1021 m_freem(m); \ 1022 (err) = ENOBUFS; \ 1023 } else { \ 1024 IF_ENQUEUE((ifq), (m)); \ 1025 (err) = 0; \ 1026 } \ 1027 if (err) \ 1028 (ifq)->ifq_drops++; \ 1029 mutex_exit((ifq)->ifq_lock); \ 1030 } while (/*CONSTCOND*/ 0) 1031 1032 #define IFQ_DEQUEUE(ifq, m) \ 1033 do { \ 1034 mutex_enter((ifq)->ifq_lock); \ 1035 IF_DEQUEUE((ifq), (m)); \ 1036 mutex_exit((ifq)->ifq_lock); \ 1037 } while (/*CONSTCOND*/ 0) 1038 1039 #define IFQ_POLL(ifq, m) \ 1040 do { \ 1041 mutex_enter((ifq)->ifq_lock); \ 1042 IF_POLL((ifq), (m)); \ 1043 mutex_exit((ifq)->ifq_lock); \ 1044 } while (/*CONSTCOND*/ 0) 1045 1046 #define IFQ_PURGE(ifq) \ 1047 do { \ 1048 mutex_enter((ifq)->ifq_lock); \ 1049 IF_PURGE(ifq); \ 1050 mutex_exit((ifq)->ifq_lock); \ 1051 } while (/*CONSTCOND*/ 0) 1052 1053 #define IFQ_SET_READY(ifq) /* nothing */ 1054 1055 #define IFQ_CLASSIFY(ifq, m, af) /* nothing */ 1056 1057 #endif /* ALTQ */ 1058 1059 #define IFQ_LOCK_INIT(ifq) (ifq)->ifq_lock = \ 1060 mutex_obj_alloc(MUTEX_DEFAULT, IPL_NET) 1061 #define IFQ_LOCK_DESTROY(ifq) mutex_obj_free((ifq)->ifq_lock) 1062 #define IFQ_LOCK(ifq) mutex_enter((ifq)->ifq_lock) 1063 #define IFQ_UNLOCK(ifq) mutex_exit((ifq)->ifq_lock) 1064 1065 #define IFQ_IS_EMPTY(ifq) IF_IS_EMPTY(ifq) 1066 #define IFQ_INC_LEN(ifq) ((ifq)->ifq_len++) 1067 #define IFQ_DEC_LEN(ifq) (--(ifq)->ifq_len) 1068 #define IFQ_INC_DROPS(ifq) ((ifq)->ifq_drops++) 1069 #define IFQ_SET_MAXLEN(ifq, len) ((ifq)->ifq_maxlen = (len)) 1070 1071 #include <sys/mallocvar.h> 1072 MALLOC_DECLARE(M_IFADDR); 1073 MALLOC_DECLARE(M_IFMADDR); 1074 1075 int ifreq_setaddr(u_long, struct ifreq *, const struct sockaddr *); 1076 1077 struct ifnet *if_alloc(u_char); 1078 void if_free(struct ifnet *); 1079 void if_initname(struct ifnet *, const char *, int); 1080 struct ifaddr *if_dl_create(const struct ifnet *, const struct sockaddr_dl **); 1081 void if_activate_sadl(struct ifnet *, struct ifaddr *, 1082 const struct sockaddr_dl *); 1083 void if_set_sadl(struct ifnet *, const void *, u_char, bool); 1084 void if_alloc_sadl(struct ifnet *); 1085 void if_free_sadl(struct ifnet *, int); 1086 int if_initialize(struct ifnet *); 1087 void if_register(struct ifnet *); 1088 int if_attach(struct ifnet *); /* Deprecated. Use if_initialize and if_register */ 1089 void if_attachdomain(void); 1090 void if_deactivate(struct ifnet *); 1091 bool if_is_deactivated(const struct ifnet *); 1092 void if_purgeaddrs(struct ifnet *, int, void (*)(struct ifaddr *)); 1093 void if_detach(struct ifnet *); 1094 void if_down(struct ifnet *); 1095 void if_down_locked(struct ifnet *); 1096 void if_link_state_change(struct ifnet *, int); 1097 void if_link_state_change_softint(struct ifnet *, int); 1098 void if_up(struct ifnet *); 1099 void ifinit(void); 1100 void ifinit1(void); 1101 void ifinit_post(void); 1102 int ifaddrpref_ioctl(struct socket *, u_long, void *, struct ifnet *); 1103 extern int (*ifioctl)(struct socket *, u_long, void *, struct lwp *); 1104 int ifioctl_common(struct ifnet *, u_long, void *); 1105 int ifpromisc(struct ifnet *, int); 1106 int ifpromisc_locked(struct ifnet *, int); 1107 int if_addr_init(ifnet_t *, struct ifaddr *, bool); 1108 int if_do_dad(struct ifnet *); 1109 int if_mcast_op(ifnet_t *, const unsigned long, const struct sockaddr *); 1110 int if_flags_set(struct ifnet *, const short); 1111 int if_clone_list(int, char *, int *); 1112 1113 struct ifnet *ifunit(const char *); 1114 struct ifnet *if_get(const char *, struct psref *); 1115 ifnet_t *if_byindex(u_int); 1116 ifnet_t *_if_byindex(u_int); 1117 ifnet_t *if_get_byindex(u_int, struct psref *); 1118 ifnet_t *if_get_bylla(const void *, unsigned char, struct psref *); 1119 void if_put(const struct ifnet *, struct psref *); 1120 void if_acquire(struct ifnet *, struct psref *); 1121 #define if_release if_put 1122 1123 int if_tunnel_check_nesting(struct ifnet *, struct mbuf *, int); 1124 percpu_t *if_tunnel_alloc_ro_percpu(void); 1125 void if_tunnel_free_ro_percpu(percpu_t *); 1126 void if_tunnel_ro_percpu_rtcache_free(percpu_t *); 1127 1128 struct tunnel_ro { 1129 struct route *tr_ro; 1130 kmutex_t *tr_lock; 1131 }; 1132 1133 static inline void 1134 if_tunnel_get_ro(percpu_t *ro_percpu, struct route **ro, kmutex_t **lock) 1135 { 1136 struct tunnel_ro *tro; 1137 1138 tro = percpu_getref(ro_percpu); 1139 *ro = tro->tr_ro; 1140 *lock = tro->tr_lock; 1141 mutex_enter(*lock); 1142 } 1143 1144 static inline void 1145 if_tunnel_put_ro(percpu_t *ro_percpu, kmutex_t *lock) 1146 { 1147 1148 mutex_exit(lock); 1149 percpu_putref(ro_percpu); 1150 } 1151 1152 static __inline if_index_t 1153 if_get_index(const struct ifnet *ifp) 1154 { 1155 1156 return ifp != NULL ? ifp->if_index : 0; 1157 } 1158 1159 bool if_held(struct ifnet *); 1160 1161 void if_input(struct ifnet *, struct mbuf *); 1162 1163 struct if_percpuq * 1164 if_percpuq_create(struct ifnet *); 1165 void if_percpuq_destroy(struct if_percpuq *); 1166 void 1167 if_percpuq_enqueue(struct if_percpuq *, struct mbuf *); 1168 1169 void if_deferred_start_init(struct ifnet *, void (*)(struct ifnet *)); 1170 void if_schedule_deferred_start(struct ifnet *); 1171 1172 void ifa_insert(struct ifnet *, struct ifaddr *); 1173 void ifa_remove(struct ifnet *, struct ifaddr *); 1174 1175 void ifa_psref_init(struct ifaddr *); 1176 void ifa_acquire(struct ifaddr *, struct psref *); 1177 void ifa_release(struct ifaddr *, struct psref *); 1178 bool ifa_held(struct ifaddr *); 1179 bool ifa_is_destroying(struct ifaddr *); 1180 1181 void ifaref(struct ifaddr *); 1182 void ifafree(struct ifaddr *); 1183 1184 struct ifaddr *ifa_ifwithaddr(const struct sockaddr *); 1185 struct ifaddr *ifa_ifwithaddr_psref(const struct sockaddr *, struct psref *); 1186 struct ifaddr *ifa_ifwithaf(int); 1187 struct ifaddr *ifa_ifwithdstaddr(const struct sockaddr *); 1188 struct ifaddr *ifa_ifwithdstaddr_psref(const struct sockaddr *, 1189 struct psref *); 1190 struct ifaddr *ifa_ifwithnet(const struct sockaddr *); 1191 struct ifaddr *ifa_ifwithnet_psref(const struct sockaddr *, struct psref *); 1192 struct ifaddr *ifa_ifwithladdr(const struct sockaddr *); 1193 struct ifaddr *ifa_ifwithladdr_psref(const struct sockaddr *, struct psref *); 1194 struct ifaddr *ifaof_ifpforaddr(const struct sockaddr *, struct ifnet *); 1195 struct ifaddr *ifaof_ifpforaddr_psref(const struct sockaddr *, struct ifnet *, 1196 struct psref *); 1197 void link_rtrequest(int, struct rtentry *, const struct rt_addrinfo *); 1198 void p2p_rtrequest(int, struct rtentry *, const struct rt_addrinfo *); 1199 1200 void if_clone_attach(struct if_clone *); 1201 void if_clone_detach(struct if_clone *); 1202 1203 int if_transmit_lock(struct ifnet *, struct mbuf *); 1204 1205 int ifq_enqueue(struct ifnet *, struct mbuf *); 1206 int ifq_enqueue2(struct ifnet *, struct ifqueue *, struct mbuf *); 1207 1208 int loioctl(struct ifnet *, u_long, void *); 1209 void loopattach(int); 1210 void loopinit(void); 1211 int looutput(struct ifnet *, 1212 struct mbuf *, const struct sockaddr *, const struct rtentry *); 1213 1214 /* 1215 * These are exported because they're an easy way to tell if 1216 * an interface is going away without having to burn a flag. 1217 */ 1218 int if_nulloutput(struct ifnet *, struct mbuf *, 1219 const struct sockaddr *, const struct rtentry *); 1220 void if_nullinput(struct ifnet *, struct mbuf *); 1221 void if_nullstart(struct ifnet *); 1222 int if_nulltransmit(struct ifnet *, struct mbuf *); 1223 int if_nullioctl(struct ifnet *, u_long, void *); 1224 int if_nullinit(struct ifnet *); 1225 void if_nullstop(struct ifnet *, int); 1226 void if_nullslowtimo(struct ifnet *); 1227 #define if_nullwatchdog if_nullslowtimo 1228 void if_nulldrain(struct ifnet *); 1229 #else 1230 struct if_nameindex { 1231 unsigned int if_index; /* 1, 2, ... */ 1232 char *if_name; /* null terminated name: "le0", ... */ 1233 }; 1234 1235 #include <sys/cdefs.h> 1236 __BEGIN_DECLS 1237 unsigned int if_nametoindex(const char *); 1238 char * if_indextoname(unsigned int, char *); 1239 struct if_nameindex * if_nameindex(void); 1240 void if_freenameindex(struct if_nameindex *); 1241 __END_DECLS 1242 #endif /* _KERNEL */ /* XXX really ALTQ? */ 1243 1244 #ifdef _KERNEL 1245 1246 #define IFADDR_FIRST(__ifp) TAILQ_FIRST(&(__ifp)->if_addrlist) 1247 #define IFADDR_NEXT(__ifa) TAILQ_NEXT((__ifa), ifa_list) 1248 #define IFADDR_FOREACH(__ifa, __ifp) TAILQ_FOREACH(__ifa, \ 1249 &(__ifp)->if_addrlist, ifa_list) 1250 #define IFADDR_FOREACH_SAFE(__ifa, __ifp, __nifa) \ 1251 TAILQ_FOREACH_SAFE(__ifa, \ 1252 &(__ifp)->if_addrlist, ifa_list, __nifa) 1253 #define IFADDR_EMPTY(__ifp) TAILQ_EMPTY(&(__ifp)->if_addrlist) 1254 1255 #define IFADDR_ENTRY_INIT(__ifa) \ 1256 PSLIST_ENTRY_INIT((__ifa), ifa_pslist_entry) 1257 #define IFADDR_ENTRY_DESTROY(__ifa) \ 1258 PSLIST_ENTRY_DESTROY((__ifa), ifa_pslist_entry) 1259 #define IFADDR_READER_EMPTY(__ifp) \ 1260 (PSLIST_READER_FIRST(&(__ifp)->if_addr_pslist, struct ifaddr, \ 1261 ifa_pslist_entry) == NULL) 1262 #define IFADDR_READER_FIRST(__ifp) \ 1263 PSLIST_READER_FIRST(&(__ifp)->if_addr_pslist, struct ifaddr, \ 1264 ifa_pslist_entry) 1265 #define IFADDR_READER_NEXT(__ifa) \ 1266 PSLIST_READER_NEXT((__ifa), struct ifaddr, ifa_pslist_entry) 1267 #define IFADDR_READER_FOREACH(__ifa, __ifp) \ 1268 PSLIST_READER_FOREACH((__ifa), &(__ifp)->if_addr_pslist, struct ifaddr,\ 1269 ifa_pslist_entry) 1270 #define IFADDR_WRITER_INSERT_HEAD(__ifp, __ifa) \ 1271 PSLIST_WRITER_INSERT_HEAD(&(__ifp)->if_addr_pslist, (__ifa), \ 1272 ifa_pslist_entry) 1273 #define IFADDR_WRITER_REMOVE(__ifa) \ 1274 PSLIST_WRITER_REMOVE((__ifa), ifa_pslist_entry) 1275 #define IFADDR_WRITER_FOREACH(__ifa, __ifp) \ 1276 PSLIST_WRITER_FOREACH((__ifa), &(__ifp)->if_addr_pslist, struct ifaddr,\ 1277 ifa_pslist_entry) 1278 #define IFADDR_WRITER_NEXT(__ifp) \ 1279 PSLIST_WRITER_NEXT((__ifp), struct ifaddr, ifa_pslist_entry) 1280 #define IFADDR_WRITER_INSERT_AFTER(__ifp, __new) \ 1281 PSLIST_WRITER_INSERT_AFTER((__ifp), (__new), ifa_pslist_entry) 1282 #define IFADDR_WRITER_EMPTY(__ifp) \ 1283 (PSLIST_WRITER_FIRST(&(__ifp)->if_addr_pslist, struct ifaddr, \ 1284 ifa_pslist_entry) == NULL) 1285 #define IFADDR_WRITER_INSERT_TAIL(__ifp, __new) \ 1286 do { \ 1287 if (IFADDR_WRITER_EMPTY(__ifp)) { \ 1288 IFADDR_WRITER_INSERT_HEAD((__ifp), (__new)); \ 1289 } else { \ 1290 struct ifaddr *__ifa; \ 1291 IFADDR_WRITER_FOREACH(__ifa, (__ifp)) { \ 1292 if (IFADDR_WRITER_NEXT(__ifa) == NULL) {\ 1293 IFADDR_WRITER_INSERT_AFTER(__ifa,\ 1294 (__new)); \ 1295 break; \ 1296 } \ 1297 } \ 1298 } \ 1299 } while (0) 1300 1301 #define IFNET_GLOBAL_LOCK() mutex_enter(&ifnet_mtx) 1302 #define IFNET_GLOBAL_UNLOCK() mutex_exit(&ifnet_mtx) 1303 #define IFNET_GLOBAL_LOCKED() mutex_owned(&ifnet_mtx) 1304 1305 #define IFNET_READER_EMPTY() \ 1306 (PSLIST_READER_FIRST(&ifnet_pslist, struct ifnet, if_pslist_entry) == NULL) 1307 #define IFNET_READER_FIRST() \ 1308 PSLIST_READER_FIRST(&ifnet_pslist, struct ifnet, if_pslist_entry) 1309 #define IFNET_READER_NEXT(__ifp) \ 1310 PSLIST_READER_NEXT((__ifp), struct ifnet, if_pslist_entry) 1311 #define IFNET_READER_FOREACH(__ifp) \ 1312 PSLIST_READER_FOREACH((__ifp), &ifnet_pslist, struct ifnet, \ 1313 if_pslist_entry) 1314 #define IFNET_WRITER_INSERT_HEAD(__ifp) \ 1315 PSLIST_WRITER_INSERT_HEAD(&ifnet_pslist, (__ifp), if_pslist_entry) 1316 #define IFNET_WRITER_REMOVE(__ifp) \ 1317 PSLIST_WRITER_REMOVE((__ifp), if_pslist_entry) 1318 #define IFNET_WRITER_FOREACH(__ifp) \ 1319 PSLIST_WRITER_FOREACH((__ifp), &ifnet_pslist, struct ifnet, \ 1320 if_pslist_entry) 1321 #define IFNET_WRITER_NEXT(__ifp) \ 1322 PSLIST_WRITER_NEXT((__ifp), struct ifnet, if_pslist_entry) 1323 #define IFNET_WRITER_INSERT_AFTER(__ifp, __new) \ 1324 PSLIST_WRITER_INSERT_AFTER((__ifp), (__new), if_pslist_entry) 1325 #define IFNET_WRITER_EMPTY() \ 1326 (PSLIST_WRITER_FIRST(&ifnet_pslist, struct ifnet, if_pslist_entry) == NULL) 1327 #define IFNET_WRITER_INSERT_TAIL(__new) \ 1328 do { \ 1329 if (IFNET_WRITER_EMPTY()) { \ 1330 IFNET_WRITER_INSERT_HEAD(__new); \ 1331 } else { \ 1332 struct ifnet *__ifp; \ 1333 IFNET_WRITER_FOREACH(__ifp) { \ 1334 if (IFNET_WRITER_NEXT(__ifp) == NULL) { \ 1335 IFNET_WRITER_INSERT_AFTER(__ifp,\ 1336 (__new)); \ 1337 break; \ 1338 } \ 1339 } \ 1340 } \ 1341 } while (0) 1342 1343 #define IFNET_LOCK(ifp) mutex_enter((ifp)->if_ioctl_lock) 1344 #define IFNET_UNLOCK(ifp) mutex_exit((ifp)->if_ioctl_lock) 1345 #define IFNET_LOCKED(ifp) mutex_owned((ifp)->if_ioctl_lock) 1346 1347 #define IFNET_ASSERT_UNLOCKED(ifp) \ 1348 KDASSERT(mutex_ownable((ifp)->if_ioctl_lock)) 1349 1350 extern struct pslist_head ifnet_pslist; 1351 extern kmutex_t ifnet_mtx; 1352 1353 extern struct ifnet *lo0ifp; 1354 1355 /* 1356 * ifq sysctl support 1357 */ 1358 int sysctl_ifq(int *name, u_int namelen, void *oldp, 1359 size_t *oldlenp, void *newp, size_t newlen, 1360 struct ifqueue *ifq); 1361 /* symbolic names for terminal (per-protocol) CTL_IFQ_ nodes */ 1362 #define IFQCTL_LEN 1 1363 #define IFQCTL_MAXLEN 2 1364 #define IFQCTL_PEAK 3 1365 #define IFQCTL_DROPS 4 1366 1367 /* 1368 * Hook for if_vlan - needed by if_agr 1369 */ 1370 MODULE_HOOK(if_vlan_vlan_input_hook, void, (struct ifnet *, struct mbuf *)); 1371 1372 #endif /* _KERNEL */ 1373 1374 #endif /* !_NET_IF_H_ */ 1375
Indexes created Sun Oct 19 02:09:48 GMT 2025