if.h revision 1.282
1 /* $NetBSD: if.h,v 1.282 2020/02/14 22:04:12 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1999, 2000, 2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by William Studenmund and Jason R. Thorpe. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1982, 1986, 1989, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)if.h 8.3 (Berkeley) 2/9/95 61 */ 62 63 #ifndef _NET_IF_H_ 64 #define _NET_IF_H_ 65 66 #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 * Only used for exporting data from the interface. 178 */ 179 struct if_data { 180 /* generic interface information */ 181 u_char ifi_type; /* ethernet, tokenring, etc. */ 182 u_char ifi_addrlen; /* media address length */ 183 u_char ifi_hdrlen; /* media header length */ 184 int ifi_link_state; /* current link state */ 185 uint64_t ifi_mtu; /* maximum transmission unit */ 186 uint64_t ifi_metric; /* routing metric (external only) */ 187 uint64_t ifi_baudrate; /* linespeed */ 188 /* volatile statistics */ 189 uint64_t ifi_ipackets; /* packets received on interface */ 190 uint64_t ifi_ierrors; /* input errors on interface */ 191 uint64_t ifi_opackets; /* packets sent on interface */ 192 uint64_t ifi_oerrors; /* output errors on interface */ 193 uint64_t ifi_collisions; /* collisions on csma interfaces */ 194 uint64_t ifi_ibytes; /* total number of octets received */ 195 uint64_t ifi_obytes; /* total number of octets sent */ 196 uint64_t ifi_imcasts; /* packets received via multicast */ 197 uint64_t ifi_omcasts; /* packets sent via multicast */ 198 uint64_t ifi_iqdrops; /* dropped on input, this interface */ 199 uint64_t ifi_noproto; /* destined for unsupported protocol */ 200 struct timespec ifi_lastchange;/* last operational state change */ 201 }; 202 203 /* 204 * Values for if_link_state. 205 */ 206 #define LINK_STATE_UNKNOWN 0 /* link invalid/unknown */ 207 #define LINK_STATE_DOWN 1 /* link is down */ 208 #define LINK_STATE_UP 2 /* link is up */ 209 210 /* 211 * Structure defining a queue for a network interface. 212 */ 213 struct ifqueue { 214 struct mbuf *ifq_head; 215 struct mbuf *ifq_tail; 216 int ifq_len; 217 int ifq_maxlen; 218 int ifq_drops; 219 kmutex_t *ifq_lock; 220 }; 221 222 #ifdef _KERNEL 223 #include <sys/percpu.h> 224 #include <sys/callout.h> 225 #include <sys/rwlock.h> 226 #include <sys/workqueue.h> 227 228 #endif /* _KERNEL */ 229 230 /* 231 * Structure defining a queue for a network interface. 232 * 233 * (Would like to call this struct ``if'', but C isn't PL/1.) 234 */ 235 TAILQ_HEAD(ifnet_head, ifnet); /* the actual queue head */ 236 237 struct bridge_softc; 238 struct bridge_iflist; 239 struct callout; 240 struct krwlock; 241 struct if_percpuq; 242 struct if_deferred_start; 243 struct in6_multi; 244 245 typedef unsigned short if_index_t; 246 247 /* 248 * Interface. Field markings and the corresponding locks: 249 * 250 * i: IFNET_LOCK (a.k.a., if_ioctl_lock) 251 * q: ifq_lock (struct ifaltq) 252 * a: if_afdata_lock 253 * 6: in6_multilock (global lock) 254 * :: unlocked, stable 255 * ?: unknown, maybe unsafe 256 * 257 * Lock order: IFNET_LOCK => in6_multilock => if_afdata_lock => ifq_lock 258 * Note that currently if_afdata_lock and ifq_lock aren't held 259 * at the same time, but define the order anyway. 260 * 261 * Lock order of IFNET_LOCK with other locks: 262 * softnet_lock => solock => IFNET_LOCK => ND6_LOCK, in_multilock 263 */ 264 typedef struct ifnet { 265 void *if_softc; /* :: lower-level data for this if */ 266 /* DEPRECATED. Keep it to avoid breaking kvm(3) users */ 267 TAILQ_ENTRY(ifnet) 268 if_list; /* i: all struct ifnets are chained */ 269 TAILQ_HEAD(, ifaddr) 270 if_addrlist; /* i: linked list of addresses per if */ 271 char if_xname[IFNAMSIZ]; 272 /* :: external name (name + unit) */ 273 int if_pcount; /* i: number of promiscuous listeners */ 274 struct bpf_if *if_bpf; /* :: packet filter structure */ 275 if_index_t if_index; /* :: numeric abbreviation for this if */ 276 short if_timer; /* ?: time 'til if_slowtimo called */ 277 unsigned short if_flags; /* i: up/down, broadcast, etc. */ 278 short if_extflags; /* :: if_output MP-safe, etc. */ 279 u_char if_type; /* :: ethernet, tokenring, etc. */ 280 u_char if_addrlen; /* :: media address length */ 281 u_char if_hdrlen; /* :: media header length */ 282 /* XXX audit :? fields here. */ 283 int if_link_state; /* :? current link state */ 284 uint64_t if_mtu; /* :? maximum transmission unit */ 285 uint64_t if_metric; /* :? routing metric (external only) */ 286 uint64_t if_baudrate; /* :? linespeed */ 287 struct timespec if_lastchange; /* :? last operational state change */ 288 #ifdef _KERNEL 289 percpu_t *if_stats; /* :: statistics */ 290 #else 291 void *if_stats; /* opaque to user-space */ 292 #endif /* _KERNEL */ 293 /* 294 * Procedure handles. If you add more of these, don't forget the 295 * corresponding NULL stub in if.c. 296 */ 297 int (*if_output) /* :: output routine (enqueue) */ 298 (struct ifnet *, struct mbuf *, const struct sockaddr *, 299 const struct rtentry *); 300 void (*_if_input) /* :: input routine (from h/w driver) */ 301 (struct ifnet *, struct mbuf *); 302 void (*if_start) /* :: initiate output routine */ 303 (struct ifnet *); 304 int (*if_transmit) /* :: output routine, must be MP-safe */ 305 (struct ifnet *, struct mbuf *); 306 int (*if_ioctl) /* :: ioctl routine */ 307 (struct ifnet *, u_long, void *); 308 int (*if_init) /* :: init routine */ 309 (struct ifnet *); 310 void (*if_stop) /* :: stop routine */ 311 (struct ifnet *, int); 312 void (*if_slowtimo) /* :: timer routine */ 313 (struct ifnet *); 314 #define if_watchdog if_slowtimo 315 void (*if_drain) /* :: routine to release resources */ 316 (struct ifnet *); 317 struct ifaltq if_snd; /* q: output queue (includes altq) */ 318 struct ifaddr *if_dl; /* i: identity of this interface. */ 319 const struct sockaddr_dl 320 *if_sadl; /* i: pointer to sockaddr_dl of if_dl */ 321 /* 322 * May be NULL. If not NULL, it is the address assigned 323 * to the interface by the manufacturer, so it very likely 324 * to be unique. It MUST NOT be deleted. It is highly 325 * suitable for deriving the EUI64 for the interface. 326 */ 327 struct ifaddr *if_hwdl; /* i: h/w identity */ 328 const uint8_t *if_broadcastaddr; 329 /* :: linklevel broadcast bytestring */ 330 struct bridge_softc 331 *if_bridge; /* i: bridge glue */ 332 struct bridge_iflist 333 *if_bridgeif; /* i: shortcut to interface list entry */ 334 int if_dlt; /* :: data link type (<net/dlt.h>) */ 335 pfil_head_t * if_pfil; /* :: filtering point */ 336 uint64_t if_capabilities; 337 /* i: interface capabilities */ 338 uint64_t if_capenable; /* i: capabilities enabled */ 339 union { 340 void * carp_s; /* carp structure (used by !carp ifs) */ 341 struct ifnet *carp_d;/* ptr to carpdev (used by carp ifs) */ 342 } if_carp_ptr; /* ?: */ 343 #define if_carp if_carp_ptr.carp_s 344 #define if_carpdev if_carp_ptr.carp_d 345 /* 346 * These are pre-computed based on an interfaces enabled 347 * capabilities, for speed elsewhere. 348 */ 349 int if_csum_flags_tx; 350 /* i: M_CSUM_* flags for Tx */ 351 int if_csum_flags_rx; 352 /* i: M_CSUM_* flags for Rx */ 353 354 void *if_afdata[AF_MAX]; 355 /* a: */ 356 struct mowner *if_mowner; /* ?: who owns mbufs for this interface */ 357 358 void *if_agrprivate; /* ?: used only when #if NAGR > 0 */ 359 void *if_npf_private;/* ?: associated NPF context */ 360 361 /* 362 * pf specific data, used only when #if NPF > 0. 363 */ 364 void *if_pf_kif; /* ?: pf interface abstraction */ 365 void *if_pf_groups; /* ?: pf interface groups */ 366 /* 367 * During an ifnet's lifetime, it has only one if_index, but 368 * and if_index is not sufficient to identify an ifnet 369 * because during the lifetime of the system, many ifnets may occupy a 370 * given if_index. Let us tell different ifnets at the same 371 * if_index apart by their if_index_gen, a unique number that each ifnet 372 * is assigned when it if_attach()s. Now, the kernel can use the 373 * pair (if_index, if_index_gen) as a weak reference to an ifnet. 374 */ 375 uint64_t if_index_gen; /* :: generation number for the ifnet 376 * at if_index: if two ifnets' index 377 * and generation number are both the 378 * same, they are the same ifnet. 379 */ 380 struct sysctllog 381 *if_sysctl_log; /* :: */ 382 int (*if_initaddr) /* :: */ 383 (struct ifnet *, struct ifaddr *, bool); 384 int (*if_mcastop) /* :: */ 385 (struct ifnet *, const unsigned long, 386 const struct sockaddr *); 387 int (*if_setflags) /* :: */ 388 (struct ifnet *, const u_short); 389 kmutex_t *if_ioctl_lock; /* :: */ 390 char *if_description; /* i: interface description */ 391 #ifdef _KERNEL /* XXX kvm(3) */ 392 struct callout *if_slowtimo_ch;/* :: */ 393 struct krwlock *if_afdata_lock;/* :: */ 394 struct if_percpuq 395 *if_percpuq; /* :: we should remove it in the future */ 396 struct work if_link_work; /* q: linkage on link state work queue */ 397 uint16_t if_link_queue; /* q: masked link state change queue */ 398 /* q: is link state work scheduled? */ 399 bool if_link_scheduled; 400 /* q: can link state work be scheduled? */ 401 bool if_link_cansched; 402 struct pslist_entry 403 if_pslist_entry;/* i: */ 404 struct psref_target 405 if_psref; /* :: */ 406 struct pslist_head 407 if_addr_pslist; /* i: */ 408 struct if_deferred_start 409 *if_deferred_start; 410 /* :: */ 411 /* XXX should be protocol independent */ 412 LIST_HEAD(, in6_multi) 413 if_multiaddrs; /* 6: */ 414 #endif 415 } ifnet_t; 416 417 #include <net/if_stats.h> 418 419 #define if_name(ifp) ((ifp)->if_xname) 420 421 #define IFF_UP 0x0001 /* interface is up */ 422 #define IFF_BROADCAST 0x0002 /* broadcast address valid */ 423 #define IFF_DEBUG 0x0004 /* turn on debugging */ 424 #define IFF_LOOPBACK 0x0008 /* is a loopback net */ 425 #define IFF_POINTOPOINT 0x0010 /* interface is point-to-point link */ 426 /* 0x0020 was IFF_NOTRAILERS */ 427 #define IFF_RUNNING 0x0040 /* resources allocated */ 428 #define IFF_NOARP 0x0080 /* no address resolution protocol */ 429 #define IFF_PROMISC 0x0100 /* receive all packets */ 430 #define IFF_ALLMULTI 0x0200 /* receive all multicast packets */ 431 #define IFF_OACTIVE 0x0400 /* transmission in progress */ 432 #define IFF_SIMPLEX 0x0800 /* can't hear own transmissions */ 433 #define IFF_LINK0 0x1000 /* per link layer defined bit */ 434 #define IFF_LINK1 0x2000 /* per link layer defined bit */ 435 #define IFF_LINK2 0x4000 /* per link layer defined bit */ 436 #define IFF_MULTICAST 0x8000 /* supports multicast */ 437 438 #define IFEF_MPSAFE __BIT(0) /* handlers can run in parallel (see below) */ 439 #define IFEF_NO_LINK_STATE_CHANGE __BIT(1) /* doesn't use link state interrupts */ 440 441 /* 442 * The guidelines for converting an interface to IFEF_MPSAFE are as follows 443 * 444 * Enabling IFEF_MPSAFE on an interface suppresses taking KERNEL_LOCK when 445 * calling the following handlers: 446 * - if_start 447 * - Note that if_transmit is always called without KERNEL_LOCK 448 * - if_output 449 * - if_ioctl 450 * - if_init 451 * - if_stop 452 * 453 * This means that an interface with IFEF_MPSAFE must make the above handlers 454 * MP-safe or take KERNEL_LOCK by itself inside handlers that aren't MP-safe 455 * yet. 456 * 457 * There are some additional restrictions to access member variables of struct 458 * ifnet: 459 * - if_flags 460 * - Must be updated with holding IFNET_LOCK 461 * - You cannot use the flag in Tx/Rx paths anymore because there is no 462 * synchronization on the flag except for IFNET_LOCK 463 * - Note that IFNET_LOCK can't be taken in softint because it's known 464 * that it causes a deadlock 465 * - Some synchronization mechanisms such as pserialize_perform are called 466 * with IFNET_LOCK and also require context switches on every CPUs 467 * that mean softints finish so trying to take IFNET_LOCK in softint 468 * might block on IFNET_LOCK and prevent such synchronization mechanisms 469 * from being completed 470 * - Currently the deadlock occurs only if NET_MPSAFE is enabled, however, 471 * we should deal with the restriction because NET_MPSAFE will be enabled 472 * by default in the future 473 * - if_watchdog and if_timer 474 * - The watchdog framework works only for non-IFEF_MPSAFE interfaces 475 * that rely on KERNEL_LOCK 476 * - Interfaces with IFEF_MPSAFE have to provide its own watchdog mechanism 477 * if needed 478 * - Keep if_watchdog NULL when calling if_attach 479 */ 480 481 #ifdef _KERNEL 482 static __inline bool 483 if_is_mpsafe(struct ifnet *ifp) 484 { 485 486 return ((ifp->if_extflags & IFEF_MPSAFE) != 0); 487 } 488 489 static __inline int 490 if_output_lock(struct ifnet *cifp, struct ifnet *ifp, struct mbuf *m, 491 const struct sockaddr *dst, const struct rtentry *rt) 492 { 493 494 if (if_is_mpsafe(cifp)) { 495 return (*cifp->if_output)(ifp, m, dst, rt); 496 } else { 497 int ret; 498 499 KERNEL_LOCK(1, NULL); 500 ret = (*cifp->if_output)(ifp, m, dst, rt); 501 KERNEL_UNLOCK_ONE(NULL); 502 return ret; 503 } 504 } 505 506 static __inline void 507 if_start_lock(struct ifnet *ifp) 508 { 509 510 if (if_is_mpsafe(ifp)) { 511 (*ifp->if_start)(ifp); 512 } else { 513 KERNEL_LOCK(1, NULL); 514 (*ifp->if_start)(ifp); 515 KERNEL_UNLOCK_ONE(NULL); 516 } 517 } 518 519 static __inline bool 520 if_is_link_state_changeable(struct ifnet *ifp) 521 { 522 523 return ((ifp->if_extflags & IFEF_NO_LINK_STATE_CHANGE) == 0); 524 } 525 526 #define KERNEL_LOCK_IF_IFP_MPSAFE(ifp) \ 527 do { if (if_is_mpsafe(ifp)) { KERNEL_LOCK(1, NULL); } } while (0) 528 #define KERNEL_UNLOCK_IF_IFP_MPSAFE(ifp) \ 529 do { if (if_is_mpsafe(ifp)) { KERNEL_UNLOCK_ONE(NULL); } } while (0) 530 531 #define KERNEL_LOCK_UNLESS_IFP_MPSAFE(ifp) \ 532 do { if (!if_is_mpsafe(ifp)) { KERNEL_LOCK(1, NULL); } } while (0) 533 #define KERNEL_UNLOCK_UNLESS_IFP_MPSAFE(ifp) \ 534 do { if (!if_is_mpsafe(ifp)) { KERNEL_UNLOCK_ONE(NULL); } } while (0) 535 536 #ifdef _KERNEL_OPT 537 #include "opt_net_mpsafe.h" 538 #endif 539 540 /* XXX explore a better place to define */ 541 #ifdef NET_MPSAFE 542 543 #define KERNEL_LOCK_UNLESS_NET_MPSAFE() do { } while (0) 544 #define KERNEL_UNLOCK_UNLESS_NET_MPSAFE() do { } while (0) 545 546 #define SOFTNET_LOCK_UNLESS_NET_MPSAFE() do { } while (0) 547 #define SOFTNET_UNLOCK_UNLESS_NET_MPSAFE() do { } while (0) 548 549 #define SOFTNET_LOCK_IF_NET_MPSAFE() \ 550 do { mutex_enter(softnet_lock); } while (0) 551 #define SOFTNET_UNLOCK_IF_NET_MPSAFE() \ 552 do { mutex_exit(softnet_lock); } while (0) 553 554 #else /* NET_MPSAFE */ 555 556 #define KERNEL_LOCK_UNLESS_NET_MPSAFE() \ 557 do { KERNEL_LOCK(1, NULL); } while (0) 558 #define KERNEL_UNLOCK_UNLESS_NET_MPSAFE() \ 559 do { KERNEL_UNLOCK_ONE(NULL); } while (0) 560 561 #define SOFTNET_LOCK_UNLESS_NET_MPSAFE() \ 562 do { mutex_enter(softnet_lock); } while (0) 563 #define SOFTNET_UNLOCK_UNLESS_NET_MPSAFE() \ 564 do { mutex_exit(softnet_lock); } while (0) 565 566 #define SOFTNET_LOCK_IF_NET_MPSAFE() do { } while (0) 567 #define SOFTNET_UNLOCK_IF_NET_MPSAFE() do { } while (0) 568 569 #endif /* NET_MPSAFE */ 570 571 #define SOFTNET_KERNEL_LOCK_UNLESS_NET_MPSAFE() \ 572 do { \ 573 SOFTNET_LOCK_UNLESS_NET_MPSAFE(); \ 574 KERNEL_LOCK_UNLESS_NET_MPSAFE(); \ 575 } while (0) 576 577 #define SOFTNET_KERNEL_UNLOCK_UNLESS_NET_MPSAFE() \ 578 do { \ 579 KERNEL_UNLOCK_UNLESS_NET_MPSAFE(); \ 580 SOFTNET_UNLOCK_UNLESS_NET_MPSAFE(); \ 581 } while (0) 582 583 #endif /* _KERNEL */ 584 585 #define IFFBITS \ 586 "\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT" \ 587 "\7RUNNING\10NOARP\11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX" \ 588 "\15LINK0\16LINK1\17LINK2\20MULTICAST" 589 590 /* flags set internally only: */ 591 #define IFF_CANTCHANGE \ 592 (IFF_BROADCAST|IFF_POINTOPOINT|IFF_RUNNING|IFF_OACTIVE|\ 593 IFF_SIMPLEX|IFF_MULTICAST|IFF_ALLMULTI|IFF_PROMISC) 594 595 /* 596 * Some convenience macros used for setting ifi_baudrate. 597 */ 598 #define IF_Kbps(x) ((x) * 1000ULL) /* kilobits/sec. */ 599 #define IF_Mbps(x) (IF_Kbps((x) * 1000ULL)) /* megabits/sec. */ 600 #define IF_Gbps(x) (IF_Mbps((x) * 1000ULL)) /* gigabits/sec. */ 601 602 /* Capabilities that interfaces can advertise. */ 603 /* 0x01 .. 0x40 were previously used */ 604 #define IFCAP_TSOv4 0x00080 /* can do TCPv4 segmentation offload */ 605 #define IFCAP_CSUM_IPv4_Rx 0x00100 /* can do IPv4 header checksums (Rx) */ 606 #define IFCAP_CSUM_IPv4_Tx 0x00200 /* can do IPv4 header checksums (Tx) */ 607 #define IFCAP_CSUM_TCPv4_Rx 0x00400 /* can do IPv4/TCP checksums (Rx) */ 608 #define IFCAP_CSUM_TCPv4_Tx 0x00800 /* can do IPv4/TCP checksums (Tx) */ 609 #define IFCAP_CSUM_UDPv4_Rx 0x01000 /* can do IPv4/UDP checksums (Rx) */ 610 #define IFCAP_CSUM_UDPv4_Tx 0x02000 /* can do IPv4/UDP checksums (Tx) */ 611 #define IFCAP_CSUM_TCPv6_Rx 0x04000 /* can do IPv6/TCP checksums (Rx) */ 612 #define IFCAP_CSUM_TCPv6_Tx 0x08000 /* can do IPv6/TCP checksums (Tx) */ 613 #define IFCAP_CSUM_UDPv6_Rx 0x10000 /* can do IPv6/UDP checksums (Rx) */ 614 #define IFCAP_CSUM_UDPv6_Tx 0x20000 /* can do IPv6/UDP checksums (Tx) */ 615 #define IFCAP_TSOv6 0x40000 /* can do TCPv6 segmentation offload */ 616 #define IFCAP_LRO 0x80000 /* can do Large Receive Offload */ 617 #define IFCAP_MASK 0xfff80 /* currently valid capabilities */ 618 619 #define IFCAPBITS \ 620 "\020" \ 621 "\10TSO4" \ 622 "\11IP4CSUM_Rx" \ 623 "\12IP4CSUM_Tx" \ 624 "\13TCP4CSUM_Rx" \ 625 "\14TCP4CSUM_Tx" \ 626 "\15UDP4CSUM_Rx" \ 627 "\16UDP4CSUM_Tx" \ 628 "\17TCP6CSUM_Rx" \ 629 "\20TCP6CSUM_Tx" \ 630 "\21UDP6CSUM_Rx" \ 631 "\22UDP6CSUM_Tx" \ 632 "\23TSO6" \ 633 "\24LRO" \ 634 635 #define IF_AFDATA_LOCK_INIT(ifp) \ 636 do {(ifp)->if_afdata_lock = rw_obj_alloc();} while (0) 637 638 #define IF_AFDATA_LOCK_DESTROY(ifp) rw_obj_free((ifp)->if_afdata_lock) 639 640 #define IF_AFDATA_WLOCK(ifp) rw_enter((ifp)->if_afdata_lock, RW_WRITER) 641 #define IF_AFDATA_RLOCK(ifp) rw_enter((ifp)->if_afdata_lock, RW_READER) 642 #define IF_AFDATA_WUNLOCK(ifp) rw_exit((ifp)->if_afdata_lock) 643 #define IF_AFDATA_RUNLOCK(ifp) rw_exit((ifp)->if_afdata_lock) 644 #define IF_AFDATA_LOCK(ifp) IF_AFDATA_WLOCK(ifp) 645 #define IF_AFDATA_UNLOCK(ifp) IF_AFDATA_WUNLOCK(ifp) 646 #define IF_AFDATA_TRYLOCK(ifp) rw_tryenter((ifp)->if_afdata_lock, RW_WRITER) 647 648 #define IF_AFDATA_LOCK_ASSERT(ifp) \ 649 KASSERT(rw_lock_held((ifp)->if_afdata_lock)) 650 #define IF_AFDATA_RLOCK_ASSERT(ifp) \ 651 KASSERT(rw_read_held((ifp)->if_afdata_lock)) 652 #define IF_AFDATA_WLOCK_ASSERT(ifp) \ 653 KASSERT(rw_write_held((ifp)->if_afdata_lock)) 654 655 /* 656 * Output queues (ifp->if_snd) and internetwork datagram level (pup level 1) 657 * input routines have queues of messages stored on ifqueue structures 658 * (defined above). Entries are added to and deleted from these structures 659 * by these macros, which should be called with ipl raised to splnet(). 660 */ 661 #define IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen) 662 #define IF_DROP(ifq) ((ifq)->ifq_drops++) 663 #define IF_ENQUEUE(ifq, m) do { \ 664 (m)->m_nextpkt = 0; \ 665 if ((ifq)->ifq_tail == 0) \ 666 (ifq)->ifq_head = m; \ 667 else \ 668 (ifq)->ifq_tail->m_nextpkt = m; \ 669 (ifq)->ifq_tail = m; \ 670 (ifq)->ifq_len++; \ 671 } while (/*CONSTCOND*/0) 672 #define IF_PREPEND(ifq, m) do { \ 673 (m)->m_nextpkt = (ifq)->ifq_head; \ 674 if ((ifq)->ifq_tail == 0) \ 675 (ifq)->ifq_tail = (m); \ 676 (ifq)->ifq_head = (m); \ 677 (ifq)->ifq_len++; \ 678 } while (/*CONSTCOND*/0) 679 #define IF_DEQUEUE(ifq, m) do { \ 680 (m) = (ifq)->ifq_head; \ 681 if (m) { \ 682 if (((ifq)->ifq_head = (m)->m_nextpkt) == 0) \ 683 (ifq)->ifq_tail = 0; \ 684 (m)->m_nextpkt = 0; \ 685 (ifq)->ifq_len--; \ 686 } \ 687 } while (/*CONSTCOND*/0) 688 #define IF_POLL(ifq, m) ((m) = (ifq)->ifq_head) 689 #define IF_PURGE(ifq) \ 690 do { \ 691 struct mbuf *__m0; \ 692 \ 693 for (;;) { \ 694 IF_DEQUEUE((ifq), __m0); \ 695 if (__m0 == NULL) \ 696 break; \ 697 else \ 698 m_freem(__m0); \ 699 } \ 700 } while (/*CONSTCOND*/ 0) 701 #define IF_IS_EMPTY(ifq) ((ifq)->ifq_len == 0) 702 703 #ifndef IFQ_MAXLEN 704 #define IFQ_MAXLEN 256 705 #endif 706 #define IFNET_SLOWHZ 1 /* granularity is 1 second */ 707 708 /* 709 * Structure defining statistics and other data kept regarding an address 710 * on a network interface. 711 */ 712 struct ifaddr_data { 713 int64_t ifad_inbytes; 714 int64_t ifad_outbytes; 715 }; 716 717 /* 718 * The ifaddr structure contains information about one address 719 * of an interface. They are maintained by the different address families, 720 * are allocated and attached when an address is set, and are linked 721 * together so all addresses for an interface can be located. 722 */ 723 struct ifaddr { 724 struct sockaddr *ifa_addr; /* address of interface */ 725 struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */ 726 #define ifa_broadaddr ifa_dstaddr /* broadcast address interface */ 727 struct sockaddr *ifa_netmask; /* used to determine subnet */ 728 struct ifnet *ifa_ifp; /* back-pointer to interface */ 729 TAILQ_ENTRY(ifaddr) ifa_list; /* list of addresses for interface */ 730 struct ifaddr_data ifa_data; /* statistics on the address */ 731 void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */ 732 (int, struct rtentry *, const struct rt_addrinfo *); 733 u_int ifa_flags; /* mostly rt_flags for cloning */ 734 int ifa_refcnt; /* count of references */ 735 int ifa_metric; /* cost of going out this interface */ 736 struct ifaddr *(*ifa_getifa)(struct ifaddr *, 737 const struct sockaddr *); 738 uint32_t *ifa_seqno; 739 int16_t ifa_preference; /* preference level for this address */ 740 #ifdef _KERNEL 741 struct pslist_entry ifa_pslist_entry; 742 struct psref_target ifa_psref; 743 #endif 744 }; 745 #define IFA_ROUTE RTF_UP /* (0x01) route installed */ 746 #define IFA_DESTROYING 0x2 747 748 /* 749 * Message format for use in obtaining information about interfaces from 750 * sysctl and the routing socket. We need to force 64-bit alignment if we 751 * aren't using compatiblity definitons. 752 */ 753 #if !defined(_KERNEL) || !defined(COMPAT_RTSOCK) 754 #define __align64 __aligned(sizeof(uint64_t)) 755 #else 756 #define __align64 757 #endif 758 struct if_msghdr { 759 u_short ifm_msglen __align64; 760 /* to skip over non-understood messages */ 761 u_char ifm_version; /* future binary compatibility */ 762 u_char ifm_type; /* message type */ 763 int ifm_addrs; /* like rtm_addrs */ 764 int ifm_flags; /* value of if_flags */ 765 u_short ifm_index; /* index for associated ifp */ 766 struct if_data ifm_data __align64; 767 /* statistics and other data about if */ 768 }; 769 770 /* 771 * Message format for use in obtaining information about interface addresses 772 * from sysctl and the routing socket. 773 */ 774 struct ifa_msghdr { 775 u_short ifam_msglen __align64; 776 /* to skip over non-understood messages */ 777 u_char ifam_version; /* future binary compatibility */ 778 u_char ifam_type; /* message type */ 779 u_short ifam_index; /* index for associated ifp */ 780 int ifam_flags; /* value of ifa_flags */ 781 int ifam_addrs; /* like rtm_addrs */ 782 pid_t ifam_pid; /* identify sender */ 783 int ifam_addrflags; /* family specific address flags */ 784 int ifam_metric; /* value of ifa_metric */ 785 }; 786 787 /* 788 * Message format announcing the arrival or departure of a network interface. 789 */ 790 struct if_announcemsghdr { 791 u_short ifan_msglen __align64; 792 /* to skip over non-understood messages */ 793 u_char ifan_version; /* future binary compatibility */ 794 u_char ifan_type; /* message type */ 795 u_short ifan_index; /* index for associated ifp */ 796 char ifan_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 797 u_short ifan_what; /* what type of announcement */ 798 }; 799 800 #define IFAN_ARRIVAL 0 /* interface arrival */ 801 #define IFAN_DEPARTURE 1 /* interface departure */ 802 803 #undef __align64 804 805 /* 806 * Interface request structure used for socket 807 * ioctl's. All interface ioctl's must have parameter 808 * definitions which begin with ifr_name. The 809 * remainder may be interface specific. 810 */ 811 struct ifreq { 812 char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 813 union { 814 struct sockaddr ifru_addr; 815 struct sockaddr ifru_dstaddr; 816 struct sockaddr ifru_broadaddr; 817 struct sockaddr_storage ifru_space; 818 short ifru_flags; 819 int ifru_addrflags; 820 int ifru_metric; 821 int ifru_mtu; 822 int ifru_dlt; 823 u_int ifru_value; 824 void * ifru_data; 825 struct { 826 uint32_t b_buflen; 827 void *b_buf; 828 } ifru_b; 829 } ifr_ifru; 830 #define ifr_addr ifr_ifru.ifru_addr /* address */ 831 #define ifr_dstaddr ifr_ifru.ifru_dstaddr /* other end of p-to-p link */ 832 #define ifr_broadaddr ifr_ifru.ifru_broadaddr /* broadcast address */ 833 #define ifr_space ifr_ifru.ifru_space /* sockaddr_storage */ 834 #define ifr_flags ifr_ifru.ifru_flags /* flags */ 835 #define ifr_addrflags ifr_ifru.ifru_addrflags /* addr flags */ 836 #define ifr_metric ifr_ifru.ifru_metric /* metric */ 837 #define ifr_mtu ifr_ifru.ifru_mtu /* mtu */ 838 #define ifr_dlt ifr_ifru.ifru_dlt /* data link type (DLT_*) */ 839 #define ifr_value ifr_ifru.ifru_value /* generic value */ 840 #define ifr_media ifr_ifru.ifru_metric /* media options (overload) */ 841 #define ifr_data ifr_ifru.ifru_data /* for use by interface 842 * XXX deprecated 843 */ 844 #define ifr_buf ifr_ifru.ifru_b.b_buf /* new interface ioctls */ 845 #define ifr_buflen ifr_ifru.ifru_b.b_buflen 846 #define ifr_index ifr_ifru.ifru_value /* interface index, BSD */ 847 #define ifr_ifindex ifr_index /* interface index, linux */ 848 }; 849 850 #ifdef _KERNEL 851 #define ifreq_setdstaddr ifreq_setaddr 852 #define ifreq_setbroadaddr ifreq_setaddr 853 #define ifreq_getdstaddr ifreq_getaddr 854 #define ifreq_getbroadaddr ifreq_getaddr 855 856 static __inline const struct sockaddr * 857 /*ARGSUSED*/ 858 ifreq_getaddr(u_long cmd, const struct ifreq *ifr) 859 { 860 return &ifr->ifr_addr; 861 } 862 #endif /* _KERNEL */ 863 864 struct ifcapreq { 865 char ifcr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 866 uint64_t ifcr_capabilities; /* supported capabiliites */ 867 uint64_t ifcr_capenable; /* capabilities enabled */ 868 }; 869 870 struct ifaliasreq { 871 char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 872 struct sockaddr ifra_addr; 873 struct sockaddr ifra_dstaddr; 874 #define ifra_broadaddr ifra_dstaddr 875 struct sockaddr ifra_mask; 876 }; 877 878 struct ifdatareq { 879 char ifdr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 880 struct if_data ifdr_data; 881 }; 882 883 struct ifmediareq { 884 char ifm_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 885 int ifm_current; /* IFMWD: current media options */ 886 int ifm_mask; /* IFMWD: don't care mask */ 887 int ifm_status; /* media status */ 888 int ifm_active; /* IFMWD: active options */ 889 int ifm_count; /* # entries in ifm_ulist 890 array */ 891 int *ifm_ulist; /* array of ifmedia word */ 892 }; 893 894 895 struct ifdrv { 896 char ifd_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 897 unsigned long ifd_cmd; 898 size_t ifd_len; 899 void *ifd_data; 900 }; 901 #define IFLINKSTR_QUERYLEN 0x01 902 #define IFLINKSTR_UNSET 0x02 903 904 /* 905 * Structure used in SIOCGIFCONF request. 906 * Used to retrieve interface configuration 907 * for machine (useful for programs which 908 * must know all networks accessible). 909 */ 910 struct ifconf { 911 int ifc_len; /* size of associated buffer */ 912 union { 913 void * ifcu_buf; 914 struct ifreq *ifcu_req; 915 } ifc_ifcu; 916 #define ifc_buf ifc_ifcu.ifcu_buf /* buffer address */ 917 #define ifc_req ifc_ifcu.ifcu_req /* array of structures returned */ 918 }; 919 920 /* 921 * Structure for SIOC[AGD]LIFADDR 922 */ 923 struct if_laddrreq { 924 char iflr_name[IFNAMSIZ]; 925 unsigned int flags; 926 #define IFLR_PREFIX 0x8000 /* in: prefix given out: kernel fills id */ 927 #define IFLR_ACTIVE 0x4000 /* in/out: link-layer address activation */ 928 #define IFLR_FACTORY 0x2000 /* in/out: factory link-layer address */ 929 unsigned int prefixlen; /* in/out */ 930 struct sockaddr_storage addr; /* in/out */ 931 struct sockaddr_storage dstaddr; /* out */ 932 }; 933 934 /* 935 * Structure for SIOC[SG]IFADDRPREF 936 */ 937 struct if_addrprefreq { 938 char ifap_name[IFNAMSIZ]; 939 int16_t ifap_preference; /* in/out */ 940 struct sockaddr_storage ifap_addr; /* in/out */ 941 }; 942 943 #include <net/if_arp.h> 944 945 #endif /* _NETBSD_SOURCE */ 946 947 #ifdef _KERNEL 948 #ifdef ALTQ 949 #define IFQ_ENQUEUE(ifq, m, err) \ 950 do { \ 951 mutex_enter((ifq)->ifq_lock); \ 952 if (ALTQ_IS_ENABLED(ifq)) \ 953 ALTQ_ENQUEUE((ifq), (m), (err)); \ 954 else { \ 955 if (IF_QFULL(ifq)) { \ 956 m_freem(m); \ 957 (err) = ENOBUFS; \ 958 } else { \ 959 IF_ENQUEUE((ifq), (m)); \ 960 (err) = 0; \ 961 } \ 962 } \ 963 if ((err)) \ 964 (ifq)->ifq_drops++; \ 965 mutex_exit((ifq)->ifq_lock); \ 966 } while (/*CONSTCOND*/ 0) 967 968 #define IFQ_DEQUEUE(ifq, m) \ 969 do { \ 970 mutex_enter((ifq)->ifq_lock); \ 971 if (TBR_IS_ENABLED(ifq)) \ 972 (m) = tbr_dequeue((ifq), ALTDQ_REMOVE); \ 973 else if (ALTQ_IS_ENABLED(ifq)) \ 974 ALTQ_DEQUEUE((ifq), (m)); \ 975 else \ 976 IF_DEQUEUE((ifq), (m)); \ 977 mutex_exit((ifq)->ifq_lock); \ 978 } while (/*CONSTCOND*/ 0) 979 980 #define IFQ_POLL(ifq, m) \ 981 do { \ 982 mutex_enter((ifq)->ifq_lock); \ 983 if (TBR_IS_ENABLED(ifq)) \ 984 (m) = tbr_dequeue((ifq), ALTDQ_POLL); \ 985 else if (ALTQ_IS_ENABLED(ifq)) \ 986 ALTQ_POLL((ifq), (m)); \ 987 else \ 988 IF_POLL((ifq), (m)); \ 989 mutex_exit((ifq)->ifq_lock); \ 990 } while (/*CONSTCOND*/ 0) 991 992 #define IFQ_PURGE(ifq) \ 993 do { \ 994 mutex_enter((ifq)->ifq_lock); \ 995 if (ALTQ_IS_ENABLED(ifq)) \ 996 ALTQ_PURGE(ifq); \ 997 else \ 998 IF_PURGE(ifq); \ 999 mutex_exit((ifq)->ifq_lock); \ 1000 } while (/*CONSTCOND*/ 0) 1001 1002 #define IFQ_SET_READY(ifq) \ 1003 do { \ 1004 (ifq)->altq_flags |= ALTQF_READY; \ 1005 } while (/*CONSTCOND*/ 0) 1006 1007 #define IFQ_CLASSIFY(ifq, m, af) \ 1008 do { \ 1009 KASSERT(((m)->m_flags & M_PKTHDR) != 0); \ 1010 mutex_enter((ifq)->ifq_lock); \ 1011 if (ALTQ_IS_ENABLED(ifq)) { \ 1012 if (ALTQ_NEEDS_CLASSIFY(ifq)) \ 1013 (m)->m_pkthdr.pattr_class = (*(ifq)->altq_classify) \ 1014 ((ifq)->altq_clfier, (m), (af)); \ 1015 (m)->m_pkthdr.pattr_af = (af); \ 1016 (m)->m_pkthdr.pattr_hdr = mtod((m), void *); \ 1017 } \ 1018 mutex_exit((ifq)->ifq_lock); \ 1019 } while (/*CONSTCOND*/ 0) 1020 #else /* ! ALTQ */ 1021 #define IFQ_ENQUEUE(ifq, m, err) \ 1022 do { \ 1023 mutex_enter((ifq)->ifq_lock); \ 1024 if (IF_QFULL(ifq)) { \ 1025 m_freem(m); \ 1026 (err) = ENOBUFS; \ 1027 } else { \ 1028 IF_ENQUEUE((ifq), (m)); \ 1029 (err) = 0; \ 1030 } \ 1031 if (err) \ 1032 (ifq)->ifq_drops++; \ 1033 mutex_exit((ifq)->ifq_lock); \ 1034 } while (/*CONSTCOND*/ 0) 1035 1036 #define IFQ_DEQUEUE(ifq, m) \ 1037 do { \ 1038 mutex_enter((ifq)->ifq_lock); \ 1039 IF_DEQUEUE((ifq), (m)); \ 1040 mutex_exit((ifq)->ifq_lock); \ 1041 } while (/*CONSTCOND*/ 0) 1042 1043 #define IFQ_POLL(ifq, m) \ 1044 do { \ 1045 mutex_enter((ifq)->ifq_lock); \ 1046 IF_POLL((ifq), (m)); \ 1047 mutex_exit((ifq)->ifq_lock); \ 1048 } while (/*CONSTCOND*/ 0) 1049 1050 #define IFQ_PURGE(ifq) \ 1051 do { \ 1052 mutex_enter((ifq)->ifq_lock); \ 1053 IF_PURGE(ifq); \ 1054 mutex_exit((ifq)->ifq_lock); \ 1055 } while (/*CONSTCOND*/ 0) 1056 1057 #define IFQ_SET_READY(ifq) /* nothing */ 1058 1059 #define IFQ_CLASSIFY(ifq, m, af) /* nothing */ 1060 1061 #endif /* ALTQ */ 1062 1063 #define IFQ_LOCK_INIT(ifq) (ifq)->ifq_lock = \ 1064 mutex_obj_alloc(MUTEX_DEFAULT, IPL_NET) 1065 #define IFQ_LOCK_DESTROY(ifq) mutex_obj_free((ifq)->ifq_lock) 1066 #define IFQ_LOCK(ifq) mutex_enter((ifq)->ifq_lock) 1067 #define IFQ_UNLOCK(ifq) mutex_exit((ifq)->ifq_lock) 1068 1069 #define IFQ_IS_EMPTY(ifq) IF_IS_EMPTY(ifq) 1070 #define IFQ_INC_LEN(ifq) ((ifq)->ifq_len++) 1071 #define IFQ_DEC_LEN(ifq) (--(ifq)->ifq_len) 1072 #define IFQ_INC_DROPS(ifq) ((ifq)->ifq_drops++) 1073 #define IFQ_SET_MAXLEN(ifq, len) ((ifq)->ifq_maxlen = (len)) 1074 1075 #include <sys/mallocvar.h> 1076 MALLOC_DECLARE(M_IFADDR); 1077 MALLOC_DECLARE(M_IFMADDR); 1078 1079 int ifreq_setaddr(u_long, struct ifreq *, const struct sockaddr *); 1080 1081 struct ifnet *if_alloc(u_char); 1082 void if_free(struct ifnet *); 1083 void if_initname(struct ifnet *, const char *, int); 1084 struct ifaddr *if_dl_create(const struct ifnet *, const struct sockaddr_dl **); 1085 void if_activate_sadl(struct ifnet *, struct ifaddr *, 1086 const struct sockaddr_dl *); 1087 void if_set_sadl(struct ifnet *, const void *, u_char, bool); 1088 void if_alloc_sadl(struct ifnet *); 1089 void if_free_sadl(struct ifnet *, int); 1090 int if_initialize(struct ifnet *); 1091 void if_register(struct ifnet *); 1092 int if_attach(struct ifnet *); /* Deprecated. Use if_initialize and if_register */ 1093 void if_attachdomain(void); 1094 void if_deactivate(struct ifnet *); 1095 bool if_is_deactivated(const struct ifnet *); 1096 void if_export_if_data(struct ifnet *, struct if_data *, bool); 1097 void if_purgeaddrs(struct ifnet *, int, void (*)(struct ifaddr *)); 1098 void if_detach(struct ifnet *); 1099 void if_down(struct ifnet *); 1100 void if_down_locked(struct ifnet *); 1101 void if_link_state_change(struct ifnet *, int); 1102 void if_up(struct ifnet *); 1103 void ifinit(void); 1104 void ifinit1(void); 1105 void ifinit_post(void); 1106 int ifaddrpref_ioctl(struct socket *, u_long, void *, struct ifnet *); 1107 extern int (*ifioctl)(struct socket *, u_long, void *, struct lwp *); 1108 int ifioctl_common(struct ifnet *, u_long, void *); 1109 int ifpromisc(struct ifnet *, int); 1110 int ifpromisc_locked(struct ifnet *, int); 1111 int if_addr_init(ifnet_t *, struct ifaddr *, bool); 1112 int if_do_dad(struct ifnet *); 1113 int if_mcast_op(ifnet_t *, const unsigned long, const struct sockaddr *); 1114 int if_flags_set(struct ifnet *, const u_short); 1115 int if_clone_list(int, char *, int *); 1116 1117 struct ifnet *ifunit(const char *); 1118 struct ifnet *if_get(const char *, struct psref *); 1119 ifnet_t *if_byindex(u_int); 1120 ifnet_t *_if_byindex(u_int); 1121 ifnet_t *if_get_byindex(u_int, struct psref *); 1122 ifnet_t *if_get_bylla(const void *, unsigned char, struct psref *); 1123 void if_put(const struct ifnet *, struct psref *); 1124 void if_acquire(struct ifnet *, struct psref *); 1125 #define if_release if_put 1126 1127 int if_tunnel_check_nesting(struct ifnet *, struct mbuf *, int); 1128 percpu_t *if_tunnel_alloc_ro_percpu(void); 1129 void if_tunnel_free_ro_percpu(percpu_t *); 1130 void if_tunnel_ro_percpu_rtcache_free(percpu_t *); 1131 1132 struct tunnel_ro { 1133 struct route *tr_ro; 1134 kmutex_t *tr_lock; 1135 }; 1136 1137 static inline void 1138 if_tunnel_get_ro(percpu_t *ro_percpu, struct route **ro, kmutex_t **lock) 1139 { 1140 struct tunnel_ro *tro; 1141 1142 tro = percpu_getref(ro_percpu); 1143 *ro = tro->tr_ro; 1144 *lock = tro->tr_lock; 1145 mutex_enter(*lock); 1146 } 1147 1148 static inline void 1149 if_tunnel_put_ro(percpu_t *ro_percpu, kmutex_t *lock) 1150 { 1151 1152 mutex_exit(lock); 1153 percpu_putref(ro_percpu); 1154 } 1155 1156 static __inline if_index_t 1157 if_get_index(const struct ifnet *ifp) 1158 { 1159 1160 return ifp != NULL ? ifp->if_index : 0; 1161 } 1162 1163 bool if_held(struct ifnet *); 1164 1165 void if_input(struct ifnet *, struct mbuf *); 1166 1167 struct if_percpuq * 1168 if_percpuq_create(struct ifnet *); 1169 void if_percpuq_destroy(struct if_percpuq *); 1170 void 1171 if_percpuq_enqueue(struct if_percpuq *, struct mbuf *); 1172 1173 void if_deferred_start_init(struct ifnet *, void (*)(struct ifnet *)); 1174 void if_schedule_deferred_start(struct ifnet *); 1175 1176 void ifa_insert(struct ifnet *, struct ifaddr *); 1177 void ifa_remove(struct ifnet *, struct ifaddr *); 1178 1179 void ifa_psref_init(struct ifaddr *); 1180 void ifa_acquire(struct ifaddr *, struct psref *); 1181 void ifa_release(struct ifaddr *, struct psref *); 1182 bool ifa_held(struct ifaddr *); 1183 bool ifa_is_destroying(struct ifaddr *); 1184 1185 void ifaref(struct ifaddr *); 1186 void ifafree(struct ifaddr *); 1187 1188 struct ifaddr *ifa_ifwithaddr(const struct sockaddr *); 1189 struct ifaddr *ifa_ifwithaddr_psref(const struct sockaddr *, struct psref *); 1190 struct ifaddr *ifa_ifwithaf(int); 1191 struct ifaddr *ifa_ifwithdstaddr(const struct sockaddr *); 1192 struct ifaddr *ifa_ifwithdstaddr_psref(const struct sockaddr *, 1193 struct psref *); 1194 struct ifaddr *ifa_ifwithnet(const struct sockaddr *); 1195 struct ifaddr *ifa_ifwithnet_psref(const struct sockaddr *, struct psref *); 1196 struct ifaddr *ifa_ifwithladdr(const struct sockaddr *); 1197 struct ifaddr *ifa_ifwithladdr_psref(const struct sockaddr *, struct psref *); 1198 struct ifaddr *ifaof_ifpforaddr(const struct sockaddr *, struct ifnet *); 1199 struct ifaddr *ifaof_ifpforaddr_psref(const struct sockaddr *, struct ifnet *, 1200 struct psref *); 1201 void link_rtrequest(int, struct rtentry *, const struct rt_addrinfo *); 1202 void p2p_rtrequest(int, struct rtentry *, const struct rt_addrinfo *); 1203 1204 void if_clone_attach(struct if_clone *); 1205 void if_clone_detach(struct if_clone *); 1206 1207 int if_transmit_lock(struct ifnet *, struct mbuf *); 1208 1209 int ifq_enqueue(struct ifnet *, struct mbuf *); 1210 int ifq_enqueue2(struct ifnet *, struct ifqueue *, struct mbuf *); 1211 1212 int loioctl(struct ifnet *, u_long, void *); 1213 void loopattach(int); 1214 void loopinit(void); 1215 int looutput(struct ifnet *, 1216 struct mbuf *, const struct sockaddr *, const struct rtentry *); 1217 1218 /* 1219 * These are exported because they're an easy way to tell if 1220 * an interface is going away without having to burn a flag. 1221 */ 1222 int if_nulloutput(struct ifnet *, struct mbuf *, 1223 const struct sockaddr *, const struct rtentry *); 1224 void if_nullinput(struct ifnet *, struct mbuf *); 1225 void if_nullstart(struct ifnet *); 1226 int if_nulltransmit(struct ifnet *, struct mbuf *); 1227 int if_nullioctl(struct ifnet *, u_long, void *); 1228 int if_nullinit(struct ifnet *); 1229 void if_nullstop(struct ifnet *, int); 1230 void if_nullslowtimo(struct ifnet *); 1231 #define if_nullwatchdog if_nullslowtimo 1232 void if_nulldrain(struct ifnet *); 1233 #else 1234 struct if_nameindex { 1235 unsigned int if_index; /* 1, 2, ... */ 1236 char *if_name; /* null terminated name: "le0", ... */ 1237 }; 1238 1239 #include <sys/cdefs.h> 1240 __BEGIN_DECLS 1241 unsigned int if_nametoindex(const char *); 1242 char * if_indextoname(unsigned int, char *); 1243 struct if_nameindex * if_nameindex(void); 1244 void if_freenameindex(struct if_nameindex *); 1245 __END_DECLS 1246 #endif /* _KERNEL */ /* XXX really ALTQ? */ 1247 1248 #ifdef _KERNEL 1249 1250 #define IFADDR_FIRST(__ifp) TAILQ_FIRST(&(__ifp)->if_addrlist) 1251 #define IFADDR_NEXT(__ifa) TAILQ_NEXT((__ifa), ifa_list) 1252 #define IFADDR_FOREACH(__ifa, __ifp) TAILQ_FOREACH(__ifa, \ 1253 &(__ifp)->if_addrlist, ifa_list) 1254 #define IFADDR_FOREACH_SAFE(__ifa, __ifp, __nifa) \ 1255 TAILQ_FOREACH_SAFE(__ifa, \ 1256 &(__ifp)->if_addrlist, ifa_list, __nifa) 1257 #define IFADDR_EMPTY(__ifp) TAILQ_EMPTY(&(__ifp)->if_addrlist) 1258 1259 #define IFADDR_ENTRY_INIT(__ifa) \ 1260 PSLIST_ENTRY_INIT((__ifa), ifa_pslist_entry) 1261 #define IFADDR_ENTRY_DESTROY(__ifa) \ 1262 PSLIST_ENTRY_DESTROY((__ifa), ifa_pslist_entry) 1263 #define IFADDR_READER_EMPTY(__ifp) \ 1264 (PSLIST_READER_FIRST(&(__ifp)->if_addr_pslist, struct ifaddr, \ 1265 ifa_pslist_entry) == NULL) 1266 #define IFADDR_READER_FIRST(__ifp) \ 1267 PSLIST_READER_FIRST(&(__ifp)->if_addr_pslist, struct ifaddr, \ 1268 ifa_pslist_entry) 1269 #define IFADDR_READER_NEXT(__ifa) \ 1270 PSLIST_READER_NEXT((__ifa), struct ifaddr, ifa_pslist_entry) 1271 #define IFADDR_READER_FOREACH(__ifa, __ifp) \ 1272 PSLIST_READER_FOREACH((__ifa), &(__ifp)->if_addr_pslist, struct ifaddr,\ 1273 ifa_pslist_entry) 1274 #define IFADDR_WRITER_INSERT_HEAD(__ifp, __ifa) \ 1275 PSLIST_WRITER_INSERT_HEAD(&(__ifp)->if_addr_pslist, (__ifa), \ 1276 ifa_pslist_entry) 1277 #define IFADDR_WRITER_REMOVE(__ifa) \ 1278 PSLIST_WRITER_REMOVE((__ifa), ifa_pslist_entry) 1279 #define IFADDR_WRITER_FOREACH(__ifa, __ifp) \ 1280 PSLIST_WRITER_FOREACH((__ifa), &(__ifp)->if_addr_pslist, struct ifaddr,\ 1281 ifa_pslist_entry) 1282 #define IFADDR_WRITER_NEXT(__ifp) \ 1283 PSLIST_WRITER_NEXT((__ifp), struct ifaddr, ifa_pslist_entry) 1284 #define IFADDR_WRITER_INSERT_AFTER(__ifp, __new) \ 1285 PSLIST_WRITER_INSERT_AFTER((__ifp), (__new), ifa_pslist_entry) 1286 #define IFADDR_WRITER_EMPTY(__ifp) \ 1287 (PSLIST_WRITER_FIRST(&(__ifp)->if_addr_pslist, struct ifaddr, \ 1288 ifa_pslist_entry) == NULL) 1289 #define IFADDR_WRITER_INSERT_TAIL(__ifp, __new) \ 1290 do { \ 1291 if (IFADDR_WRITER_EMPTY(__ifp)) { \ 1292 IFADDR_WRITER_INSERT_HEAD((__ifp), (__new)); \ 1293 } else { \ 1294 struct ifaddr *__ifa; \ 1295 IFADDR_WRITER_FOREACH(__ifa, (__ifp)) { \ 1296 if (IFADDR_WRITER_NEXT(__ifa) == NULL) {\ 1297 IFADDR_WRITER_INSERT_AFTER(__ifa,\ 1298 (__new)); \ 1299 break; \ 1300 } \ 1301 } \ 1302 } \ 1303 } while (0) 1304 1305 #define IFNET_GLOBAL_LOCK() mutex_enter(&ifnet_mtx) 1306 #define IFNET_GLOBAL_UNLOCK() mutex_exit(&ifnet_mtx) 1307 #define IFNET_GLOBAL_LOCKED() mutex_owned(&ifnet_mtx) 1308 1309 #define IFNET_READER_EMPTY() \ 1310 (PSLIST_READER_FIRST(&ifnet_pslist, struct ifnet, if_pslist_entry) == NULL) 1311 #define IFNET_READER_FIRST() \ 1312 PSLIST_READER_FIRST(&ifnet_pslist, struct ifnet, if_pslist_entry) 1313 #define IFNET_READER_NEXT(__ifp) \ 1314 PSLIST_READER_NEXT((__ifp), struct ifnet, if_pslist_entry) 1315 #define IFNET_READER_FOREACH(__ifp) \ 1316 PSLIST_READER_FOREACH((__ifp), &ifnet_pslist, struct ifnet, \ 1317 if_pslist_entry) 1318 #define IFNET_WRITER_INSERT_HEAD(__ifp) \ 1319 PSLIST_WRITER_INSERT_HEAD(&ifnet_pslist, (__ifp), if_pslist_entry) 1320 #define IFNET_WRITER_REMOVE(__ifp) \ 1321 PSLIST_WRITER_REMOVE((__ifp), if_pslist_entry) 1322 #define IFNET_WRITER_FOREACH(__ifp) \ 1323 PSLIST_WRITER_FOREACH((__ifp), &ifnet_pslist, struct ifnet, \ 1324 if_pslist_entry) 1325 #define IFNET_WRITER_NEXT(__ifp) \ 1326 PSLIST_WRITER_NEXT((__ifp), struct ifnet, if_pslist_entry) 1327 #define IFNET_WRITER_INSERT_AFTER(__ifp, __new) \ 1328 PSLIST_WRITER_INSERT_AFTER((__ifp), (__new), if_pslist_entry) 1329 #define IFNET_WRITER_EMPTY() \ 1330 (PSLIST_WRITER_FIRST(&ifnet_pslist, struct ifnet, if_pslist_entry) == NULL) 1331 #define IFNET_WRITER_INSERT_TAIL(__new) \ 1332 do { \ 1333 if (IFNET_WRITER_EMPTY()) { \ 1334 IFNET_WRITER_INSERT_HEAD(__new); \ 1335 } else { \ 1336 struct ifnet *__ifp; \ 1337 IFNET_WRITER_FOREACH(__ifp) { \ 1338 if (IFNET_WRITER_NEXT(__ifp) == NULL) { \ 1339 IFNET_WRITER_INSERT_AFTER(__ifp,\ 1340 (__new)); \ 1341 break; \ 1342 } \ 1343 } \ 1344 } \ 1345 } while (0) 1346 1347 #define IFNET_LOCK(ifp) mutex_enter((ifp)->if_ioctl_lock) 1348 #define IFNET_UNLOCK(ifp) mutex_exit((ifp)->if_ioctl_lock) 1349 #define IFNET_LOCKED(ifp) mutex_owned((ifp)->if_ioctl_lock) 1350 1351 #define IFNET_ASSERT_UNLOCKED(ifp) \ 1352 KDASSERT(mutex_ownable((ifp)->if_ioctl_lock)) 1353 1354 extern struct pslist_head ifnet_pslist; 1355 extern kmutex_t ifnet_mtx; 1356 1357 extern struct ifnet *lo0ifp; 1358 1359 /* 1360 * ifq sysctl support 1361 */ 1362 int sysctl_ifq(int *name, u_int namelen, void *oldp, 1363 size_t *oldlenp, void *newp, size_t newlen, 1364 struct ifqueue *ifq); 1365 /* symbolic names for terminal (per-protocol) CTL_IFQ_ nodes */ 1366 #define IFQCTL_LEN 1 1367 #define IFQCTL_MAXLEN 2 1368 #define IFQCTL_PEAK 3 1369 #define IFQCTL_DROPS 4 1370 1371 /* 1372 * Hook for if_vlan - needed by if_agr 1373 */ 1374 MODULE_HOOK(if_vlan_vlan_input_hook, void, (struct ifnet *, struct mbuf *)); 1375 1376 #endif /* _KERNEL */ 1377 1378 #endif /* !_NET_IF_H_ */ 1379
Indexes created Fri Oct 17 23:09:53 GMT 2025