if.h revision 1.267
1 /* $NetBSD: if.h,v 1.267 2019/02/05 06:17:03 msaitoh 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 #if defined(_NETBSD_SOURCE) 79 80 #include <sys/socket.h> 81 #include <sys/queue.h> 82 #include <sys/mutex.h> 83 84 #include <net/dlt.h> 85 #include <net/pfil.h> 86 #ifdef _KERNEL 87 #include <net/pktqueue.h> 88 #include <sys/pslist.h> 89 #include <sys/pserialize.h> 90 #include <sys/psref.h> 91 #endif 92 93 /* 94 * Always include ALTQ glue here -- we use the ALTQ interface queue 95 * structure even when ALTQ is not configured into the kernel so that 96 * the size of struct ifnet does not changed based on the option. The 97 * ALTQ queue structure is API-compatible with the legacy ifqueue. 98 */ 99 #include <altq/if_altq.h> 100 101 /* 102 * Structures defining a network interface, providing a packet 103 * transport mechanism (ala level 0 of the PUP protocols). 104 * 105 * Each interface accepts output datagrams of a specified maximum 106 * length, and provides higher level routines with input datagrams 107 * received from its medium. 108 * 109 * Output occurs when the routine if_output is called, with four parameters: 110 * (*ifp->if_output)(ifp, m, dst, rt) 111 * Here m is the mbuf chain to be sent and dst is the destination address. 112 * The output routine encapsulates the supplied datagram if necessary, 113 * and then transmits it on its medium. 114 * 115 * On input, each interface unwraps the data received by it, and either 116 * places it on the input queue of a internetwork datagram routine 117 * and posts the associated software interrupt, or passes the datagram to a raw 118 * packet input routine. 119 * 120 * Routines exist for locating interfaces by their addresses 121 * or for locating a interface on a certain network, as well as more general 122 * routing and gateway routines maintaining information used to locate 123 * interfaces. These routines live in the files if.c and route.c 124 */ 125 #include <sys/time.h> 126 127 #if defined(_KERNEL_OPT) 128 #include "opt_compat_netbsd.h" 129 #include "opt_gateway.h" 130 #endif 131 132 struct mbuf; 133 struct proc; 134 struct rtentry; 135 struct socket; 136 struct ether_header; 137 struct ifaddr; 138 struct ifnet; 139 struct rt_addrinfo; 140 141 #define IFNAMSIZ IF_NAMESIZE 142 143 /* 144 * Structure describing a `cloning' interface. 145 */ 146 struct if_clone { 147 LIST_ENTRY(if_clone) ifc_list; /* on list of cloners */ 148 const char *ifc_name; /* name of device, e.g. `gif' */ 149 size_t ifc_namelen; /* length of name */ 150 151 int (*ifc_create)(struct if_clone *, int); 152 int (*ifc_destroy)(struct ifnet *); 153 }; 154 155 #define IF_CLONE_INITIALIZER(name, create, destroy) \ 156 { { NULL, NULL }, name, sizeof(name) - 1, create, destroy } 157 158 /* 159 * Structure used to query names of interface cloners. 160 */ 161 struct if_clonereq { 162 int ifcr_total; /* total cloners (out) */ 163 int ifcr_count; /* room for this many in user buffer */ 164 char *ifcr_buffer; /* buffer for cloner names */ 165 }; 166 167 /* 168 * Structure defining statistics and other data kept regarding a network 169 * interface. 170 */ 171 struct if_data { 172 /* generic interface information */ 173 u_char ifi_type; /* ethernet, tokenring, etc. */ 174 u_char ifi_addrlen; /* media address length */ 175 u_char ifi_hdrlen; /* media header length */ 176 int ifi_link_state; /* current link state */ 177 uint64_t ifi_mtu; /* maximum transmission unit */ 178 uint64_t ifi_metric; /* routing metric (external only) */ 179 uint64_t ifi_baudrate; /* linespeed */ 180 /* volatile statistics */ 181 uint64_t ifi_ipackets; /* packets received on interface */ 182 uint64_t ifi_ierrors; /* input errors on interface */ 183 uint64_t ifi_opackets; /* packets sent on interface */ 184 uint64_t ifi_oerrors; /* output errors on interface */ 185 uint64_t ifi_collisions; /* collisions on csma interfaces */ 186 uint64_t ifi_ibytes; /* total number of octets received */ 187 uint64_t ifi_obytes; /* total number of octets sent */ 188 uint64_t ifi_imcasts; /* packets received via multicast */ 189 uint64_t ifi_omcasts; /* packets sent via multicast */ 190 uint64_t ifi_iqdrops; /* dropped on input, this interface */ 191 uint64_t ifi_noproto; /* destined for unsupported protocol */ 192 struct timespec ifi_lastchange;/* last operational state change */ 193 }; 194 195 /* 196 * Values for if_link_state. 197 */ 198 #define LINK_STATE_UNKNOWN 0 /* link invalid/unknown */ 199 #define LINK_STATE_DOWN 1 /* link is down */ 200 #define LINK_STATE_UP 2 /* link is up */ 201 202 /* 203 * Structure defining a queue for a network interface. 204 */ 205 struct ifqueue { 206 struct mbuf *ifq_head; 207 struct mbuf *ifq_tail; 208 int ifq_len; 209 int ifq_maxlen; 210 int ifq_drops; 211 kmutex_t *ifq_lock; 212 }; 213 214 #ifdef _KERNEL 215 #include <sys/percpu.h> 216 #include <sys/callout.h> 217 #include <sys/rwlock.h> 218 219 #endif /* _KERNEL */ 220 221 /* 222 * Structure defining a queue for a network interface. 223 * 224 * (Would like to call this struct ``if'', but C isn't PL/1.) 225 */ 226 TAILQ_HEAD(ifnet_head, ifnet); /* the actual queue head */ 227 228 struct bridge_softc; 229 struct bridge_iflist; 230 struct callout; 231 struct krwlock; 232 struct if_percpuq; 233 struct if_deferred_start; 234 struct in6_multi; 235 236 typedef unsigned short if_index_t; 237 238 /* 239 * Interface. Field markings and the corresponding locks: 240 * 241 * i: IFNET_LOCK (a.k.a., if_ioctl_lock) 242 * q: ifq_lock (struct ifaltq) 243 * a: if_afdata_lock 244 * 6: in6_multilock (global lock) 245 * :: unlocked, stable 246 * ?: unkown, maybe unsafe 247 * 248 * Lock order: IFNET_LOCK => in6_multilock => if_afdata_lock => ifq_lock 249 * Note that currently if_afdata_lock and ifq_lock aren't held 250 * at the same time, but define the order anyway. 251 * 252 * Lock order of IFNET_LOCK with other locks: 253 * softnet_lock => solock => IFNET_LOCK => ND6_LOCK, in_multilock 254 */ 255 typedef struct ifnet { 256 void *if_softc; /* :: lower-level data for this if */ 257 /* DEPRECATED. Keep it to avoid breaking kvm(3) users */ 258 TAILQ_ENTRY(ifnet) 259 if_list; /* i: all struct ifnets are chained */ 260 TAILQ_HEAD(, ifaddr) 261 if_addrlist; /* i: linked list of addresses per if */ 262 char if_xname[IFNAMSIZ]; 263 /* :: external name (name + unit) */ 264 int if_pcount; /* i: number of promiscuous listeners */ 265 struct bpf_if *if_bpf; /* :: packet filter structure */ 266 if_index_t if_index; /* :: numeric abbreviation for this if */ 267 short if_timer; /* ?: time 'til if_slowtimo called */ 268 unsigned short if_flags; /* i: up/down, broadcast, etc. */ 269 short if_extflags; /* :: if_output MP-safe, etc. */ 270 struct if_data if_data; /* ?: statistics and other data about if */ 271 /* 272 * Procedure handles. If you add more of these, don't forget the 273 * corresponding NULL stub in if.c. 274 */ 275 int (*if_output) /* :: output routine (enqueue) */ 276 (struct ifnet *, struct mbuf *, const struct sockaddr *, 277 const struct rtentry *); 278 void (*_if_input) /* :: input routine (from h/w driver) */ 279 (struct ifnet *, struct mbuf *); 280 void (*if_start) /* :: initiate output routine */ 281 (struct ifnet *); 282 int (*if_transmit) /* :: output routine, must be MP-safe */ 283 (struct ifnet *, struct mbuf *); 284 int (*if_ioctl) /* :: ioctl routine */ 285 (struct ifnet *, u_long, void *); 286 int (*if_init) /* :: init routine */ 287 (struct ifnet *); 288 void (*if_stop) /* :: stop routine */ 289 (struct ifnet *, int); 290 void (*if_slowtimo) /* :: timer routine */ 291 (struct ifnet *); 292 #define if_watchdog if_slowtimo 293 void (*if_drain) /* :: routine to release resources */ 294 (struct ifnet *); 295 struct ifaltq if_snd; /* q: output queue (includes altq) */ 296 struct ifaddr *if_dl; /* i: identity of this interface. */ 297 const struct sockaddr_dl 298 *if_sadl; /* i: pointer to sockaddr_dl of if_dl */ 299 /* 300 * May be NULL. If not NULL, it is the address assigned 301 * to the interface by the manufacturer, so it very likely 302 * to be unique. It MUST NOT be deleted. It is highly 303 * suitable for deriving the EUI64 for the interface. 304 */ 305 struct ifaddr *if_hwdl; /* i: h/w identity */ 306 const uint8_t *if_broadcastaddr; 307 /* :: linklevel broadcast bytestring */ 308 struct bridge_softc 309 *if_bridge; /* i: bridge glue */ 310 struct bridge_iflist 311 *if_bridgeif; /* i: shortcut to interface list entry */ 312 int if_dlt; /* :: data link type (<net/dlt.h>) */ 313 pfil_head_t * if_pfil; /* :: filtering point */ 314 uint64_t if_capabilities; 315 /* i: interface capabilities */ 316 uint64_t if_capenable; /* i: capabilities enabled */ 317 union { 318 void * carp_s; /* carp structure (used by !carp ifs) */ 319 struct ifnet *carp_d;/* ptr to carpdev (used by carp ifs) */ 320 } if_carp_ptr; /* ?: */ 321 #define if_carp if_carp_ptr.carp_s 322 #define if_carpdev if_carp_ptr.carp_d 323 /* 324 * These are pre-computed based on an interfaces enabled 325 * capabilities, for speed elsewhere. 326 */ 327 int if_csum_flags_tx; 328 /* i: M_CSUM_* flags for Tx */ 329 int if_csum_flags_rx; 330 /* i: M_CSUM_* flags for Rx */ 331 332 void *if_afdata[AF_MAX]; 333 /* a: */ 334 struct mowner *if_mowner; /* ?: who owns mbufs for this interface */ 335 336 void *if_agrprivate; /* ?: used only when #if NAGR > 0 */ 337 338 /* 339 * pf specific data, used only when #if NPF > 0. 340 */ 341 void *if_pf_kif; /* ?: pf interface abstraction */ 342 void *if_pf_groups; /* ?: pf interface groups */ 343 /* 344 * During an ifnet's lifetime, it has only one if_index, but 345 * and if_index is not sufficient to identify an ifnet 346 * because during the lifetime of the system, many ifnets may occupy a 347 * given if_index. Let us tell different ifnets at the same 348 * if_index apart by their if_index_gen, a unique number that each ifnet 349 * is assigned when it if_attach()s. Now, the kernel can use the 350 * pair (if_index, if_index_gen) as a weak reference to an ifnet. 351 */ 352 uint64_t if_index_gen; /* :: generation number for the ifnet 353 * at if_index: if two ifnets' index 354 * and generation number are both the 355 * same, they are the same ifnet. 356 */ 357 struct sysctllog 358 *if_sysctl_log; /* :: */ 359 int (*if_initaddr) /* :: */ 360 (struct ifnet *, struct ifaddr *, bool); 361 int (*if_mcastop) /* :: */ 362 (struct ifnet *, const unsigned long, 363 const struct sockaddr *); 364 int (*if_setflags) /* :: */ 365 (struct ifnet *, const short); 366 kmutex_t *if_ioctl_lock; /* :: */ 367 #ifdef _KERNEL /* XXX kvm(3) */ 368 struct callout *if_slowtimo_ch;/* :: */ 369 struct krwlock *if_afdata_lock;/* :: */ 370 struct if_percpuq 371 *if_percpuq; /* :: we should remove it in the future */ 372 void *if_link_si; /* :: softint to handle link state changes */ 373 uint16_t if_link_queue; /* q: masked link state change queue */ 374 struct pslist_entry 375 if_pslist_entry;/* i: */ 376 struct psref_target 377 if_psref; /* :: */ 378 struct pslist_head 379 if_addr_pslist; /* i: */ 380 struct if_deferred_start 381 *if_deferred_start; 382 /* :: */ 383 /* XXX should be protocol independent */ 384 LIST_HEAD(, in6_multi) 385 if_multiaddrs; /* 6: */ 386 #endif 387 } ifnet_t; 388 389 #define if_mtu if_data.ifi_mtu 390 #define if_type if_data.ifi_type 391 #define if_addrlen if_data.ifi_addrlen 392 #define if_hdrlen if_data.ifi_hdrlen 393 #define if_metric if_data.ifi_metric 394 #define if_link_state if_data.ifi_link_state 395 #define if_baudrate if_data.ifi_baudrate 396 #define if_ipackets if_data.ifi_ipackets 397 #define if_ierrors if_data.ifi_ierrors 398 #define if_opackets if_data.ifi_opackets 399 #define if_oerrors if_data.ifi_oerrors 400 #define if_collisions if_data.ifi_collisions 401 #define if_ibytes if_data.ifi_ibytes 402 #define if_obytes if_data.ifi_obytes 403 #define if_imcasts if_data.ifi_imcasts 404 #define if_omcasts if_data.ifi_omcasts 405 #define if_iqdrops if_data.ifi_iqdrops 406 #define if_noproto if_data.ifi_noproto 407 #define if_lastchange if_data.ifi_lastchange 408 #define if_name(ifp) ((ifp)->if_xname) 409 410 #define IFF_UP 0x0001 /* interface is up */ 411 #define IFF_BROADCAST 0x0002 /* broadcast address valid */ 412 #define IFF_DEBUG 0x0004 /* turn on debugging */ 413 #define IFF_LOOPBACK 0x0008 /* is a loopback net */ 414 #define IFF_POINTOPOINT 0x0010 /* interface is point-to-point link */ 415 /* 0x0020 was IFF_NOTRAILERS */ 416 #define IFF_RUNNING 0x0040 /* resources allocated */ 417 #define IFF_NOARP 0x0080 /* no address resolution protocol */ 418 #define IFF_PROMISC 0x0100 /* receive all packets */ 419 #define IFF_ALLMULTI 0x0200 /* receive all multicast packets */ 420 #define IFF_OACTIVE 0x0400 /* transmission in progress */ 421 #define IFF_SIMPLEX 0x0800 /* can't hear own transmissions */ 422 #define IFF_LINK0 0x1000 /* per link layer defined bit */ 423 #define IFF_LINK1 0x2000 /* per link layer defined bit */ 424 #define IFF_LINK2 0x4000 /* per link layer defined bit */ 425 #define IFF_MULTICAST 0x8000 /* supports multicast */ 426 427 #define IFEF_MPSAFE __BIT(0) /* handlers can run in parallel (see below) */ 428 #define IFEF_NO_LINK_STATE_CHANGE __BIT(1) /* doesn't use link state interrupts */ 429 430 /* 431 * The guidelines for converting an interface to IFEF_MPSAFE are as follows 432 * 433 * Enabling IFEF_MPSAFE on an interface suppresses taking KERNEL_LOCK when 434 * calling the following handlers: 435 * - if_start 436 * - Note that if_transmit is always called without KERNEL_LOCK 437 * - if_output 438 * - if_ioctl 439 * - if_init 440 * - if_stop 441 * 442 * This means that an interface with IFEF_MPSAFE must make the above handlers 443 * MP-safe or take KERNEL_LOCK by itself inside handlers that aren't MP-safe 444 * yet. 445 * 446 * There are some additional restrictions to access member variables of struct 447 * ifnet: 448 * - if_flags 449 * - Must be updated with holding IFNET_LOCK 450 * - You cannot use the flag in Tx/Rx paths anymore because there is no 451 * synchronization on the flag except for IFNET_LOCK 452 * - Note that IFNET_LOCK can't be taken in softint because it's known 453 * that it causes a deadlock 454 * - Some synchronization mechanisms such as pserialize_perform are called 455 * with IFNET_LOCK and also require context switches on every CPUs 456 * that mean softints finish so trying to take IFNET_LOCK in softint 457 * might block on IFNET_LOCK and prevent such synchronization mechanisms 458 * from being completed 459 * - Currently the deadlock occurs only if NET_MPSAFE is enabled, however, 460 * we should deal with the restriction because NET_MPSAFE will be enabled 461 * by default in the future 462 * - if_watchdog and if_timer 463 * - The watchdog framework works only for non-IFEF_MPSAFE interfaces 464 * that rely on KERNEL_LOCK 465 * - Interfaces with IFEF_MPSAFE have to provide its own watchdog mechanism 466 * if needed 467 * - Keep if_watchdog NULL when calling if_attach 468 */ 469 470 #ifdef _KERNEL 471 static __inline bool 472 if_is_mpsafe(struct ifnet *ifp) 473 { 474 475 return ((ifp->if_extflags & IFEF_MPSAFE) != 0); 476 } 477 478 static __inline int 479 if_output_lock(struct ifnet *cifp, struct ifnet *ifp, struct mbuf *m, 480 const struct sockaddr *dst, const struct rtentry *rt) 481 { 482 483 if (if_is_mpsafe(cifp)) { 484 return (*cifp->if_output)(ifp, m, dst, rt); 485 } else { 486 int ret; 487 488 KERNEL_LOCK(1, NULL); 489 ret = (*cifp->if_output)(ifp, m, dst, rt); 490 KERNEL_UNLOCK_ONE(NULL); 491 return ret; 492 } 493 } 494 495 static __inline void 496 if_start_lock(struct ifnet *ifp) 497 { 498 499 if (if_is_mpsafe(ifp)) { 500 (*ifp->if_start)(ifp); 501 } else { 502 KERNEL_LOCK(1, NULL); 503 (*ifp->if_start)(ifp); 504 KERNEL_UNLOCK_ONE(NULL); 505 } 506 } 507 508 static __inline bool 509 if_is_link_state_changeable(struct ifnet *ifp) 510 { 511 512 return ((ifp->if_extflags & IFEF_NO_LINK_STATE_CHANGE) == 0); 513 } 514 515 #define KERNEL_LOCK_IF_IFP_MPSAFE(ifp) \ 516 do { if (if_is_mpsafe(ifp)) { KERNEL_LOCK(1, NULL); } } while (0) 517 #define KERNEL_UNLOCK_IF_IFP_MPSAFE(ifp) \ 518 do { if (if_is_mpsafe(ifp)) { KERNEL_UNLOCK_ONE(NULL); } } while (0) 519 520 #define KERNEL_LOCK_UNLESS_IFP_MPSAFE(ifp) \ 521 do { if (!if_is_mpsafe(ifp)) { KERNEL_LOCK(1, NULL); } } while (0) 522 #define KERNEL_UNLOCK_UNLESS_IFP_MPSAFE(ifp) \ 523 do { if (!if_is_mpsafe(ifp)) { KERNEL_UNLOCK_ONE(NULL); } } while (0) 524 525 #ifdef _KERNEL_OPT 526 #include "opt_net_mpsafe.h" 527 #endif 528 529 /* XXX explore a better place to define */ 530 #ifdef NET_MPSAFE 531 532 #define KERNEL_LOCK_UNLESS_NET_MPSAFE() do { } while (0) 533 #define KERNEL_UNLOCK_UNLESS_NET_MPSAFE() do { } while (0) 534 535 #define SOFTNET_LOCK_UNLESS_NET_MPSAFE() do { } while (0) 536 #define SOFTNET_UNLOCK_UNLESS_NET_MPSAFE() do { } while (0) 537 538 #define SOFTNET_LOCK_IF_NET_MPSAFE() \ 539 do { mutex_enter(softnet_lock); } while (0) 540 #define SOFTNET_UNLOCK_IF_NET_MPSAFE() \ 541 do { mutex_exit(softnet_lock); } while (0) 542 543 #else /* NET_MPSAFE */ 544 545 #define KERNEL_LOCK_UNLESS_NET_MPSAFE() \ 546 do { KERNEL_LOCK(1, NULL); } while (0) 547 #define KERNEL_UNLOCK_UNLESS_NET_MPSAFE() \ 548 do { KERNEL_UNLOCK_ONE(NULL); } while (0) 549 550 #define SOFTNET_LOCK_UNLESS_NET_MPSAFE() \ 551 do { mutex_enter(softnet_lock); } while (0) 552 #define SOFTNET_UNLOCK_UNLESS_NET_MPSAFE() \ 553 do { mutex_exit(softnet_lock); } while (0) 554 555 #define SOFTNET_LOCK_IF_NET_MPSAFE() do { } while (0) 556 #define SOFTNET_UNLOCK_IF_NET_MPSAFE() do { } while (0) 557 558 #endif /* NET_MPSAFE */ 559 560 #define SOFTNET_KERNEL_LOCK_UNLESS_NET_MPSAFE() \ 561 do { \ 562 SOFTNET_LOCK_UNLESS_NET_MPSAFE(); \ 563 KERNEL_LOCK_UNLESS_NET_MPSAFE(); \ 564 } while (0) 565 566 #define SOFTNET_KERNEL_UNLOCK_UNLESS_NET_MPSAFE() \ 567 do { \ 568 KERNEL_UNLOCK_UNLESS_NET_MPSAFE(); \ 569 SOFTNET_UNLOCK_UNLESS_NET_MPSAFE(); \ 570 } while (0) 571 572 #endif /* _KERNEL */ 573 574 #define IFFBITS \ 575 "\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\6NOTRAILERS" \ 576 "\7RUNNING\10NOARP\11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX" \ 577 "\15LINK0\16LINK1\17LINK2\20MULTICAST" 578 579 /* flags set internally only: */ 580 #define IFF_CANTCHANGE \ 581 (IFF_BROADCAST|IFF_POINTOPOINT|IFF_RUNNING|IFF_OACTIVE|\ 582 IFF_SIMPLEX|IFF_MULTICAST|IFF_ALLMULTI|IFF_PROMISC) 583 584 /* 585 * Some convenience macros used for setting ifi_baudrate. 586 */ 587 #define IF_Kbps(x) ((x) * 1000ULL) /* kilobits/sec. */ 588 #define IF_Mbps(x) (IF_Kbps((x) * 1000ULL)) /* megabits/sec. */ 589 #define IF_Gbps(x) (IF_Mbps((x) * 1000ULL)) /* gigabits/sec. */ 590 591 /* Capabilities that interfaces can advertise. */ 592 /* 0x01 .. 0x40 were previously used */ 593 #define IFCAP_TSOv4 0x00080 /* can do TCPv4 segmentation offload */ 594 #define IFCAP_CSUM_IPv4_Rx 0x00100 /* can do IPv4 header checksums (Rx) */ 595 #define IFCAP_CSUM_IPv4_Tx 0x00200 /* can do IPv4 header checksums (Tx) */ 596 #define IFCAP_CSUM_TCPv4_Rx 0x00400 /* can do IPv4/TCP checksums (Rx) */ 597 #define IFCAP_CSUM_TCPv4_Tx 0x00800 /* can do IPv4/TCP checksums (Tx) */ 598 #define IFCAP_CSUM_UDPv4_Rx 0x01000 /* can do IPv4/UDP checksums (Rx) */ 599 #define IFCAP_CSUM_UDPv4_Tx 0x02000 /* can do IPv4/UDP checksums (Tx) */ 600 #define IFCAP_CSUM_TCPv6_Rx 0x04000 /* can do IPv6/TCP checksums (Rx) */ 601 #define IFCAP_CSUM_TCPv6_Tx 0x08000 /* can do IPv6/TCP checksums (Tx) */ 602 #define IFCAP_CSUM_UDPv6_Rx 0x10000 /* can do IPv6/UDP checksums (Rx) */ 603 #define IFCAP_CSUM_UDPv6_Tx 0x20000 /* can do IPv6/UDP checksums (Tx) */ 604 #define IFCAP_TSOv6 0x40000 /* can do TCPv6 segmentation offload */ 605 #define IFCAP_LRO 0x80000 /* can do Large Receive Offload */ 606 #define IFCAP_MASK 0xfff80 /* currently valid capabilities */ 607 608 #define IFCAPBITS \ 609 "\020" \ 610 "\10TSO4" \ 611 "\11IP4CSUM_Rx" \ 612 "\12IP4CSUM_Tx" \ 613 "\13TCP4CSUM_Rx" \ 614 "\14TCP4CSUM_Tx" \ 615 "\15UDP4CSUM_Rx" \ 616 "\16UDP4CSUM_Tx" \ 617 "\17TCP6CSUM_Rx" \ 618 "\20TCP6CSUM_Tx" \ 619 "\21UDP6CSUM_Rx" \ 620 "\22UDP6CSUM_Tx" \ 621 "\23TSO6" \ 622 "\24LRO" \ 623 624 #define IF_AFDATA_LOCK_INIT(ifp) \ 625 do {(ifp)->if_afdata_lock = rw_obj_alloc();} while (0) 626 627 #define IF_AFDATA_LOCK_DESTROY(ifp) rw_obj_free((ifp)->if_afdata_lock) 628 629 #define IF_AFDATA_WLOCK(ifp) rw_enter((ifp)->if_afdata_lock, RW_WRITER) 630 #define IF_AFDATA_RLOCK(ifp) rw_enter((ifp)->if_afdata_lock, RW_READER) 631 #define IF_AFDATA_WUNLOCK(ifp) rw_exit((ifp)->if_afdata_lock) 632 #define IF_AFDATA_RUNLOCK(ifp) rw_exit((ifp)->if_afdata_lock) 633 #define IF_AFDATA_LOCK(ifp) IF_AFDATA_WLOCK(ifp) 634 #define IF_AFDATA_UNLOCK(ifp) IF_AFDATA_WUNLOCK(ifp) 635 #define IF_AFDATA_TRYLOCK(ifp) rw_tryenter((ifp)->if_afdata_lock, RW_WRITER) 636 637 #define IF_AFDATA_LOCK_ASSERT(ifp) \ 638 KASSERT(rw_lock_held((ifp)->if_afdata_lock)) 639 #define IF_AFDATA_RLOCK_ASSERT(ifp) \ 640 KASSERT(rw_read_held((ifp)->if_afdata_lock)) 641 #define IF_AFDATA_WLOCK_ASSERT(ifp) \ 642 KASSERT(rw_write_held((ifp)->if_afdata_lock)) 643 644 /* 645 * Output queues (ifp->if_snd) and internetwork datagram level (pup level 1) 646 * input routines have queues of messages stored on ifqueue structures 647 * (defined above). Entries are added to and deleted from these structures 648 * by these macros, which should be called with ipl raised to splnet(). 649 */ 650 #define IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen) 651 #define IF_DROP(ifq) ((ifq)->ifq_drops++) 652 #define IF_ENQUEUE(ifq, m) do { \ 653 (m)->m_nextpkt = 0; \ 654 if ((ifq)->ifq_tail == 0) \ 655 (ifq)->ifq_head = m; \ 656 else \ 657 (ifq)->ifq_tail->m_nextpkt = m; \ 658 (ifq)->ifq_tail = m; \ 659 (ifq)->ifq_len++; \ 660 } while (/*CONSTCOND*/0) 661 #define IF_PREPEND(ifq, m) do { \ 662 (m)->m_nextpkt = (ifq)->ifq_head; \ 663 if ((ifq)->ifq_tail == 0) \ 664 (ifq)->ifq_tail = (m); \ 665 (ifq)->ifq_head = (m); \ 666 (ifq)->ifq_len++; \ 667 } while (/*CONSTCOND*/0) 668 #define IF_DEQUEUE(ifq, m) do { \ 669 (m) = (ifq)->ifq_head; \ 670 if (m) { \ 671 if (((ifq)->ifq_head = (m)->m_nextpkt) == 0) \ 672 (ifq)->ifq_tail = 0; \ 673 (m)->m_nextpkt = 0; \ 674 (ifq)->ifq_len--; \ 675 } \ 676 } while (/*CONSTCOND*/0) 677 #define IF_POLL(ifq, m) ((m) = (ifq)->ifq_head) 678 #define IF_PURGE(ifq) \ 679 do { \ 680 struct mbuf *__m0; \ 681 \ 682 for (;;) { \ 683 IF_DEQUEUE((ifq), __m0); \ 684 if (__m0 == NULL) \ 685 break; \ 686 else \ 687 m_freem(__m0); \ 688 } \ 689 } while (/*CONSTCOND*/ 0) 690 #define IF_IS_EMPTY(ifq) ((ifq)->ifq_len == 0) 691 692 #ifndef IFQ_MAXLEN 693 #define IFQ_MAXLEN 256 694 #endif 695 #define IFNET_SLOWHZ 1 /* granularity is 1 second */ 696 697 /* 698 * Structure defining statistics and other data kept regarding an address 699 * on a network interface. 700 */ 701 struct ifaddr_data { 702 int64_t ifad_inbytes; 703 int64_t ifad_outbytes; 704 }; 705 706 /* 707 * The ifaddr structure contains information about one address 708 * of an interface. They are maintained by the different address families, 709 * are allocated and attached when an address is set, and are linked 710 * together so all addresses for an interface can be located. 711 */ 712 struct ifaddr { 713 struct sockaddr *ifa_addr; /* address of interface */ 714 struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */ 715 #define ifa_broadaddr ifa_dstaddr /* broadcast address interface */ 716 struct sockaddr *ifa_netmask; /* used to determine subnet */ 717 struct ifnet *ifa_ifp; /* back-pointer to interface */ 718 TAILQ_ENTRY(ifaddr) ifa_list; /* list of addresses for interface */ 719 struct ifaddr_data ifa_data; /* statistics on the address */ 720 void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */ 721 (int, struct rtentry *, const struct rt_addrinfo *); 722 u_int ifa_flags; /* mostly rt_flags for cloning */ 723 int ifa_refcnt; /* count of references */ 724 int ifa_metric; /* cost of going out this interface */ 725 struct ifaddr *(*ifa_getifa)(struct ifaddr *, 726 const struct sockaddr *); 727 uint32_t *ifa_seqno; 728 int16_t ifa_preference; /* preference level for this address */ 729 #ifdef _KERNEL 730 struct pslist_entry ifa_pslist_entry; 731 struct psref_target ifa_psref; 732 #endif 733 }; 734 #define IFA_ROUTE RTF_UP /* (0x01) route installed */ 735 #define IFA_DESTROYING 0x2 736 737 /* 738 * Message format for use in obtaining information about interfaces from 739 * sysctl and the routing socket. We need to force 64-bit alignment if we 740 * aren't using compatiblity definitons. 741 */ 742 #if !defined(_KERNEL) || !defined(COMPAT_RTSOCK) 743 #define __align64 __aligned(sizeof(uint64_t)) 744 #else 745 #define __align64 746 #endif 747 struct if_msghdr { 748 u_short ifm_msglen __align64; 749 /* to skip over non-understood messages */ 750 u_char ifm_version; /* future binary compatibility */ 751 u_char ifm_type; /* message type */ 752 int ifm_addrs; /* like rtm_addrs */ 753 int ifm_flags; /* value of if_flags */ 754 u_short ifm_index; /* index for associated ifp */ 755 struct if_data ifm_data __align64; 756 /* statistics and other data about if */ 757 }; 758 759 /* 760 * Message format for use in obtaining information about interface addresses 761 * from sysctl and the routing socket. 762 */ 763 struct ifa_msghdr { 764 u_short ifam_msglen __align64; 765 /* to skip over non-understood messages */ 766 u_char ifam_version; /* future binary compatibility */ 767 u_char ifam_type; /* message type */ 768 u_short ifam_index; /* index for associated ifp */ 769 int ifam_flags; /* value of ifa_flags */ 770 int ifam_addrs; /* like rtm_addrs */ 771 pid_t ifam_pid; /* identify sender */ 772 int ifam_addrflags; /* family specific address flags */ 773 int ifam_metric; /* value of ifa_metric */ 774 }; 775 776 /* 777 * Message format announcing the arrival or departure of a network interface. 778 */ 779 struct if_announcemsghdr { 780 u_short ifan_msglen __align64; 781 /* to skip over non-understood messages */ 782 u_char ifan_version; /* future binary compatibility */ 783 u_char ifan_type; /* message type */ 784 u_short ifan_index; /* index for associated ifp */ 785 char ifan_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 786 u_short ifan_what; /* what type of announcement */ 787 }; 788 789 #define IFAN_ARRIVAL 0 /* interface arrival */ 790 #define IFAN_DEPARTURE 1 /* interface departure */ 791 792 #undef __align64 793 794 /* 795 * Interface request structure used for socket 796 * ioctl's. All interface ioctl's must have parameter 797 * definitions which begin with ifr_name. The 798 * remainder may be interface specific. 799 */ 800 struct ifreq { 801 char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 802 union { 803 struct sockaddr ifru_addr; 804 struct sockaddr ifru_dstaddr; 805 struct sockaddr ifru_broadaddr; 806 struct sockaddr_storage ifru_space; 807 short ifru_flags; 808 int ifru_addrflags; 809 int ifru_metric; 810 int ifru_mtu; 811 int ifru_dlt; 812 u_int ifru_value; 813 void * ifru_data; 814 struct { 815 uint32_t b_buflen; 816 void *b_buf; 817 } ifru_b; 818 } ifr_ifru; 819 #define ifr_addr ifr_ifru.ifru_addr /* address */ 820 #define ifr_dstaddr ifr_ifru.ifru_dstaddr /* other end of p-to-p link */ 821 #define ifr_broadaddr ifr_ifru.ifru_broadaddr /* broadcast address */ 822 #define ifr_space ifr_ifru.ifru_space /* sockaddr_storage */ 823 #define ifr_flags ifr_ifru.ifru_flags /* flags */ 824 #define ifr_addrflags ifr_ifru.ifru_addrflags /* addr flags */ 825 #define ifr_metric ifr_ifru.ifru_metric /* metric */ 826 #define ifr_mtu ifr_ifru.ifru_mtu /* mtu */ 827 #define ifr_dlt ifr_ifru.ifru_dlt /* data link type (DLT_*) */ 828 #define ifr_value ifr_ifru.ifru_value /* generic value */ 829 #define ifr_media ifr_ifru.ifru_metric /* media options (overload) */ 830 #define ifr_data ifr_ifru.ifru_data /* for use by interface 831 * XXX deprecated 832 */ 833 #define ifr_buf ifr_ifru.ifru_b.b_buf /* new interface ioctls */ 834 #define ifr_buflen ifr_ifru.ifru_b.b_buflen 835 #define ifr_index ifr_ifru.ifru_value /* interface index, BSD */ 836 #define ifr_ifindex ifr_index /* interface index, linux */ 837 }; 838 839 #ifdef _KERNEL 840 #define ifreq_setdstaddr ifreq_setaddr 841 #define ifreq_setbroadaddr ifreq_setaddr 842 #define ifreq_getdstaddr ifreq_getaddr 843 #define ifreq_getbroadaddr ifreq_getaddr 844 845 static __inline const struct sockaddr * 846 /*ARGSUSED*/ 847 ifreq_getaddr(u_long cmd, const struct ifreq *ifr) 848 { 849 return &ifr->ifr_addr; 850 } 851 #endif /* _KERNEL */ 852 853 struct ifcapreq { 854 char ifcr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 855 uint64_t ifcr_capabilities; /* supported capabiliites */ 856 uint64_t ifcr_capenable; /* capabilities enabled */ 857 }; 858 859 struct ifaliasreq { 860 char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 861 struct sockaddr ifra_addr; 862 struct sockaddr ifra_dstaddr; 863 #define ifra_broadaddr ifra_dstaddr 864 struct sockaddr ifra_mask; 865 }; 866 867 struct ifdatareq { 868 char ifdr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 869 struct if_data ifdr_data; 870 }; 871 872 struct ifmediareq { 873 char ifm_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 874 int ifm_current; /* current media options */ 875 int ifm_mask; /* don't care mask */ 876 int ifm_status; /* media status */ 877 int ifm_active; /* active options */ 878 int ifm_count; /* # entries in ifm_ulist 879 array */ 880 int *ifm_ulist; /* media words */ 881 }; 882 883 884 struct ifdrv { 885 char ifd_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 886 unsigned long ifd_cmd; 887 size_t ifd_len; 888 void *ifd_data; 889 }; 890 #define IFLINKSTR_QUERYLEN 0x01 891 #define IFLINKSTR_UNSET 0x02 892 893 /* 894 * Structure used in SIOCGIFCONF request. 895 * Used to retrieve interface configuration 896 * for machine (useful for programs which 897 * must know all networks accessible). 898 */ 899 struct ifconf { 900 int ifc_len; /* size of associated buffer */ 901 union { 902 void * ifcu_buf; 903 struct ifreq *ifcu_req; 904 } ifc_ifcu; 905 #define ifc_buf ifc_ifcu.ifcu_buf /* buffer address */ 906 #define ifc_req ifc_ifcu.ifcu_req /* array of structures returned */ 907 }; 908 909 /* 910 * Structure for SIOC[AGD]LIFADDR 911 */ 912 struct if_laddrreq { 913 char iflr_name[IFNAMSIZ]; 914 unsigned int flags; 915 #define IFLR_PREFIX 0x8000 /* in: prefix given out: kernel fills id */ 916 #define IFLR_ACTIVE 0x4000 /* in/out: link-layer address activation */ 917 #define IFLR_FACTORY 0x2000 /* in/out: factory link-layer address */ 918 unsigned int prefixlen; /* in/out */ 919 struct sockaddr_storage addr; /* in/out */ 920 struct sockaddr_storage dstaddr; /* out */ 921 }; 922 923 /* 924 * Structure for SIOC[SG]IFADDRPREF 925 */ 926 struct if_addrprefreq { 927 char ifap_name[IFNAMSIZ]; 928 int16_t ifap_preference; /* in/out */ 929 struct sockaddr_storage ifap_addr; /* in/out */ 930 }; 931 932 #include <net/if_arp.h> 933 934 #endif /* _NETBSD_SOURCE */ 935 936 #ifdef _KERNEL 937 #ifdef ALTQ 938 #define IFQ_ENQUEUE(ifq, m, err) \ 939 do { \ 940 mutex_enter((ifq)->ifq_lock); \ 941 if (ALTQ_IS_ENABLED((ifq))) \ 942 ALTQ_ENQUEUE((ifq), (m), (err)); \ 943 else { \ 944 if (IF_QFULL((ifq))) { \ 945 m_freem((m)); \ 946 (err) = ENOBUFS; \ 947 } else { \ 948 IF_ENQUEUE((ifq), (m)); \ 949 (err) = 0; \ 950 } \ 951 } \ 952 if ((err)) \ 953 (ifq)->ifq_drops++; \ 954 mutex_exit((ifq)->ifq_lock); \ 955 } while (/*CONSTCOND*/ 0) 956 957 #define IFQ_DEQUEUE(ifq, m) \ 958 do { \ 959 mutex_enter((ifq)->ifq_lock); \ 960 if (TBR_IS_ENABLED((ifq))) \ 961 (m) = tbr_dequeue((ifq), ALTDQ_REMOVE); \ 962 else if (ALTQ_IS_ENABLED((ifq))) \ 963 ALTQ_DEQUEUE((ifq), (m)); \ 964 else \ 965 IF_DEQUEUE((ifq), (m)); \ 966 mutex_exit((ifq)->ifq_lock); \ 967 } while (/*CONSTCOND*/ 0) 968 969 #define IFQ_POLL(ifq, m) \ 970 do { \ 971 mutex_enter((ifq)->ifq_lock); \ 972 if (TBR_IS_ENABLED((ifq))) \ 973 (m) = tbr_dequeue((ifq), ALTDQ_POLL); \ 974 else if (ALTQ_IS_ENABLED((ifq))) \ 975 ALTQ_POLL((ifq), (m)); \ 976 else \ 977 IF_POLL((ifq), (m)); \ 978 mutex_exit((ifq)->ifq_lock); \ 979 } while (/*CONSTCOND*/ 0) 980 981 #define IFQ_PURGE(ifq) \ 982 do { \ 983 mutex_enter((ifq)->ifq_lock); \ 984 if (ALTQ_IS_ENABLED((ifq))) \ 985 ALTQ_PURGE((ifq)); \ 986 else \ 987 IF_PURGE((ifq)); \ 988 mutex_exit((ifq)->ifq_lock); \ 989 } while (/*CONSTCOND*/ 0) 990 991 #define IFQ_SET_READY(ifq) \ 992 do { \ 993 (ifq)->altq_flags |= ALTQF_READY; \ 994 } while (/*CONSTCOND*/ 0) 995 996 #define IFQ_CLASSIFY(ifq, m, af) \ 997 do { \ 998 KASSERT((m->m_flags & M_PKTHDR) != 0); \ 999 mutex_enter((ifq)->ifq_lock); \ 1000 if (ALTQ_IS_ENABLED((ifq))) { \ 1001 if (ALTQ_NEEDS_CLASSIFY((ifq))) \ 1002 m->m_pkthdr.pattr_class = (*(ifq)->altq_classify) \ 1003 ((ifq)->altq_clfier, (m), (af)); \ 1004 m->m_pkthdr.pattr_af = (af); \ 1005 m->m_pkthdr.pattr_hdr = mtod((m), void *); \ 1006 } \ 1007 mutex_exit((ifq)->ifq_lock); \ 1008 } while (/*CONSTCOND*/ 0) 1009 #else /* ! ALTQ */ 1010 #define IFQ_ENQUEUE(ifq, m, err) \ 1011 do { \ 1012 mutex_enter((ifq)->ifq_lock); \ 1013 if (IF_QFULL((ifq))) { \ 1014 m_freem((m)); \ 1015 (err) = ENOBUFS; \ 1016 } else { \ 1017 IF_ENQUEUE((ifq), (m)); \ 1018 (err) = 0; \ 1019 } \ 1020 if ((err)) \ 1021 (ifq)->ifq_drops++; \ 1022 mutex_exit((ifq)->ifq_lock); \ 1023 } while (/*CONSTCOND*/ 0) 1024 1025 #define IFQ_DEQUEUE(ifq, m) \ 1026 do { \ 1027 mutex_enter((ifq)->ifq_lock); \ 1028 IF_DEQUEUE((ifq), (m)); \ 1029 mutex_exit((ifq)->ifq_lock); \ 1030 } while (/*CONSTCOND*/ 0) 1031 1032 #define IFQ_POLL(ifq, m) \ 1033 do { \ 1034 mutex_enter((ifq)->ifq_lock); \ 1035 IF_POLL((ifq), (m)); \ 1036 mutex_exit((ifq)->ifq_lock); \ 1037 } while (/*CONSTCOND*/ 0) 1038 1039 #define IFQ_PURGE(ifq) \ 1040 do { \ 1041 mutex_enter((ifq)->ifq_lock); \ 1042 IF_PURGE((ifq)); \ 1043 mutex_exit((ifq)->ifq_lock); \ 1044 } while (/*CONSTCOND*/ 0) 1045 1046 #define IFQ_SET_READY(ifq) /* nothing */ 1047 1048 #define IFQ_CLASSIFY(ifq, m, af) /* nothing */ 1049 1050 #endif /* ALTQ */ 1051 1052 #define IFQ_LOCK_INIT(ifq) (ifq)->ifq_lock = \ 1053 mutex_obj_alloc(MUTEX_DEFAULT, IPL_NET) 1054 #define IFQ_LOCK_DESTROY(ifq) mutex_obj_free((ifq)->ifq_lock) 1055 #define IFQ_LOCK(ifq) mutex_enter((ifq)->ifq_lock) 1056 #define IFQ_UNLOCK(ifq) mutex_exit((ifq)->ifq_lock) 1057 1058 #define IFQ_IS_EMPTY(ifq) IF_IS_EMPTY((ifq)) 1059 #define IFQ_INC_LEN(ifq) ((ifq)->ifq_len++) 1060 #define IFQ_DEC_LEN(ifq) (--(ifq)->ifq_len) 1061 #define IFQ_INC_DROPS(ifq) ((ifq)->ifq_drops++) 1062 #define IFQ_SET_MAXLEN(ifq, len) ((ifq)->ifq_maxlen = (len)) 1063 1064 #include <sys/mallocvar.h> 1065 MALLOC_DECLARE(M_IFADDR); 1066 MALLOC_DECLARE(M_IFMADDR); 1067 1068 int ifreq_setaddr(u_long, struct ifreq *, const struct sockaddr *); 1069 1070 struct ifnet *if_alloc(u_char); 1071 void if_free(struct ifnet *); 1072 void if_initname(struct ifnet *, const char *, int); 1073 struct ifaddr *if_dl_create(const struct ifnet *, const struct sockaddr_dl **); 1074 void if_activate_sadl(struct ifnet *, struct ifaddr *, 1075 const struct sockaddr_dl *); 1076 void if_set_sadl(struct ifnet *, const void *, u_char, bool); 1077 void if_alloc_sadl(struct ifnet *); 1078 void if_free_sadl(struct ifnet *, int); 1079 int if_initialize(struct ifnet *); 1080 void if_register(struct ifnet *); 1081 int if_attach(struct ifnet *); /* Deprecated. Use if_initialize and if_register */ 1082 void if_attachdomain(void); 1083 void if_deactivate(struct ifnet *); 1084 bool if_is_deactivated(const struct ifnet *); 1085 void if_purgeaddrs(struct ifnet *, int, void (*)(struct ifaddr *)); 1086 void if_detach(struct ifnet *); 1087 void if_down(struct ifnet *); 1088 void if_down_locked(struct ifnet *); 1089 void if_link_state_change(struct ifnet *, int); 1090 void if_link_state_change_softint(struct ifnet *, int); 1091 void if_up(struct ifnet *); 1092 void ifinit(void); 1093 void ifinit1(void); 1094 void ifinit_post(void); 1095 int ifaddrpref_ioctl(struct socket *, u_long, void *, struct ifnet *); 1096 extern int (*ifioctl)(struct socket *, u_long, void *, struct lwp *); 1097 int ifioctl_common(struct ifnet *, u_long, void *); 1098 int ifpromisc(struct ifnet *, int); 1099 int ifpromisc_locked(struct ifnet *, int); 1100 int if_addr_init(ifnet_t *, struct ifaddr *, bool); 1101 int if_do_dad(struct ifnet *); 1102 int if_mcast_op(ifnet_t *, const unsigned long, const struct sockaddr *); 1103 int if_flags_set(struct ifnet *, const short); 1104 int if_clone_list(int, char *, int *); 1105 1106 struct ifnet *ifunit(const char *); 1107 struct ifnet *if_get(const char *, struct psref *); 1108 ifnet_t *if_byindex(u_int); 1109 ifnet_t *_if_byindex(u_int); 1110 ifnet_t *if_get_byindex(u_int, struct psref *); 1111 ifnet_t *if_get_bylla(const void *, unsigned char, struct psref *); 1112 void if_put(const struct ifnet *, struct psref *); 1113 void if_acquire(struct ifnet *, struct psref *); 1114 #define if_release if_put 1115 1116 int if_tunnel_check_nesting(struct ifnet *, struct mbuf *, int); 1117 1118 static __inline if_index_t 1119 if_get_index(const struct ifnet *ifp) 1120 { 1121 1122 return ifp != NULL ? ifp->if_index : 0; 1123 } 1124 1125 bool if_held(struct ifnet *); 1126 1127 void if_input(struct ifnet *, struct mbuf *); 1128 1129 struct if_percpuq * 1130 if_percpuq_create(struct ifnet *); 1131 void if_percpuq_destroy(struct if_percpuq *); 1132 void 1133 if_percpuq_enqueue(struct if_percpuq *, struct mbuf *); 1134 1135 void if_deferred_start_init(struct ifnet *, void (*)(struct ifnet *)); 1136 void if_schedule_deferred_start(struct ifnet *); 1137 1138 void ifa_insert(struct ifnet *, struct ifaddr *); 1139 void ifa_remove(struct ifnet *, struct ifaddr *); 1140 1141 void ifa_psref_init(struct ifaddr *); 1142 void ifa_acquire(struct ifaddr *, struct psref *); 1143 void ifa_release(struct ifaddr *, struct psref *); 1144 bool ifa_held(struct ifaddr *); 1145 bool ifa_is_destroying(struct ifaddr *); 1146 1147 void ifaref(struct ifaddr *); 1148 void ifafree(struct ifaddr *); 1149 1150 struct ifaddr *ifa_ifwithaddr(const struct sockaddr *); 1151 struct ifaddr *ifa_ifwithaddr_psref(const struct sockaddr *, struct psref *); 1152 struct ifaddr *ifa_ifwithaf(int); 1153 struct ifaddr *ifa_ifwithdstaddr(const struct sockaddr *); 1154 struct ifaddr *ifa_ifwithdstaddr_psref(const struct sockaddr *, 1155 struct psref *); 1156 struct ifaddr *ifa_ifwithnet(const struct sockaddr *); 1157 struct ifaddr *ifa_ifwithnet_psref(const struct sockaddr *, struct psref *); 1158 struct ifaddr *ifa_ifwithladdr(const struct sockaddr *); 1159 struct ifaddr *ifa_ifwithladdr_psref(const struct sockaddr *, struct psref *); 1160 struct ifaddr *ifaof_ifpforaddr(const struct sockaddr *, struct ifnet *); 1161 struct ifaddr *ifaof_ifpforaddr_psref(const struct sockaddr *, struct ifnet *, 1162 struct psref *); 1163 void link_rtrequest(int, struct rtentry *, const struct rt_addrinfo *); 1164 void p2p_rtrequest(int, struct rtentry *, const struct rt_addrinfo *); 1165 1166 void if_clone_attach(struct if_clone *); 1167 void if_clone_detach(struct if_clone *); 1168 1169 int if_transmit_lock(struct ifnet *, struct mbuf *); 1170 1171 int ifq_enqueue(struct ifnet *, struct mbuf *); 1172 int ifq_enqueue2(struct ifnet *, struct ifqueue *, struct mbuf *); 1173 1174 int loioctl(struct ifnet *, u_long, void *); 1175 void loopattach(int); 1176 void loopinit(void); 1177 int looutput(struct ifnet *, 1178 struct mbuf *, const struct sockaddr *, const struct rtentry *); 1179 1180 /* 1181 * These are exported because they're an easy way to tell if 1182 * an interface is going away without having to burn a flag. 1183 */ 1184 int if_nulloutput(struct ifnet *, struct mbuf *, 1185 const struct sockaddr *, const struct rtentry *); 1186 void if_nullinput(struct ifnet *, struct mbuf *); 1187 void if_nullstart(struct ifnet *); 1188 int if_nulltransmit(struct ifnet *, struct mbuf *); 1189 int if_nullioctl(struct ifnet *, u_long, void *); 1190 int if_nullinit(struct ifnet *); 1191 void if_nullstop(struct ifnet *, int); 1192 void if_nullslowtimo(struct ifnet *); 1193 #define if_nullwatchdog if_nullslowtimo 1194 void if_nulldrain(struct ifnet *); 1195 #else 1196 struct if_nameindex { 1197 unsigned int if_index; /* 1, 2, ... */ 1198 char *if_name; /* null terminated name: "le0", ... */ 1199 }; 1200 1201 #include <sys/cdefs.h> 1202 __BEGIN_DECLS 1203 unsigned int if_nametoindex(const char *); 1204 char * if_indextoname(unsigned int, char *); 1205 struct if_nameindex * if_nameindex(void); 1206 void if_freenameindex(struct if_nameindex *); 1207 __END_DECLS 1208 #endif /* _KERNEL */ /* XXX really ALTQ? */ 1209 1210 #ifdef _KERNEL 1211 1212 #define IFADDR_FIRST(__ifp) TAILQ_FIRST(&(__ifp)->if_addrlist) 1213 #define IFADDR_NEXT(__ifa) TAILQ_NEXT((__ifa), ifa_list) 1214 #define IFADDR_FOREACH(__ifa, __ifp) TAILQ_FOREACH(__ifa, \ 1215 &(__ifp)->if_addrlist, ifa_list) 1216 #define IFADDR_FOREACH_SAFE(__ifa, __ifp, __nifa) \ 1217 TAILQ_FOREACH_SAFE(__ifa, \ 1218 &(__ifp)->if_addrlist, ifa_list, __nifa) 1219 #define IFADDR_EMPTY(__ifp) TAILQ_EMPTY(&(__ifp)->if_addrlist) 1220 1221 #define IFADDR_ENTRY_INIT(__ifa) \ 1222 PSLIST_ENTRY_INIT((__ifa), ifa_pslist_entry) 1223 #define IFADDR_ENTRY_DESTROY(__ifa) \ 1224 PSLIST_ENTRY_DESTROY((__ifa), ifa_pslist_entry) 1225 #define IFADDR_READER_EMPTY(__ifp) \ 1226 (PSLIST_READER_FIRST(&(__ifp)->if_addr_pslist, struct ifaddr, \ 1227 ifa_pslist_entry) == NULL) 1228 #define IFADDR_READER_FIRST(__ifp) \ 1229 PSLIST_READER_FIRST(&(__ifp)->if_addr_pslist, struct ifaddr, \ 1230 ifa_pslist_entry) 1231 #define IFADDR_READER_NEXT(__ifa) \ 1232 PSLIST_READER_NEXT((__ifa), struct ifaddr, ifa_pslist_entry) 1233 #define IFADDR_READER_FOREACH(__ifa, __ifp) \ 1234 PSLIST_READER_FOREACH((__ifa), &(__ifp)->if_addr_pslist, struct ifaddr,\ 1235 ifa_pslist_entry) 1236 #define IFADDR_WRITER_INSERT_HEAD(__ifp, __ifa) \ 1237 PSLIST_WRITER_INSERT_HEAD(&(__ifp)->if_addr_pslist, (__ifa), \ 1238 ifa_pslist_entry) 1239 #define IFADDR_WRITER_REMOVE(__ifa) \ 1240 PSLIST_WRITER_REMOVE((__ifa), ifa_pslist_entry) 1241 #define IFADDR_WRITER_FOREACH(__ifa, __ifp) \ 1242 PSLIST_WRITER_FOREACH((__ifa), &(__ifp)->if_addr_pslist, struct ifaddr,\ 1243 ifa_pslist_entry) 1244 #define IFADDR_WRITER_NEXT(__ifp) \ 1245 PSLIST_WRITER_NEXT((__ifp), struct ifaddr, ifa_pslist_entry) 1246 #define IFADDR_WRITER_INSERT_AFTER(__ifp, __new) \ 1247 PSLIST_WRITER_INSERT_AFTER((__ifp), (__new), ifa_pslist_entry) 1248 #define IFADDR_WRITER_EMPTY(__ifp) \ 1249 (PSLIST_WRITER_FIRST(&(__ifp)->if_addr_pslist, struct ifaddr, \ 1250 ifa_pslist_entry) == NULL) 1251 #define IFADDR_WRITER_INSERT_TAIL(__ifp, __new) \ 1252 do { \ 1253 if (IFADDR_WRITER_EMPTY((__ifp))) { \ 1254 IFADDR_WRITER_INSERT_HEAD((__ifp), (__new)); \ 1255 } else { \ 1256 struct ifaddr *__ifa; \ 1257 IFADDR_WRITER_FOREACH(__ifa, (__ifp)) { \ 1258 if (IFADDR_WRITER_NEXT(__ifa) == NULL) {\ 1259 IFADDR_WRITER_INSERT_AFTER(__ifa,\ 1260 (__new)); \ 1261 break; \ 1262 } \ 1263 } \ 1264 } \ 1265 } while (0) 1266 1267 #define IFNET_GLOBAL_LOCK() mutex_enter(&ifnet_mtx) 1268 #define IFNET_GLOBAL_UNLOCK() mutex_exit(&ifnet_mtx) 1269 #define IFNET_GLOBAL_LOCKED() mutex_owned(&ifnet_mtx) 1270 1271 #define IFNET_READER_EMPTY() \ 1272 (PSLIST_READER_FIRST(&ifnet_pslist, struct ifnet, if_pslist_entry) == NULL) 1273 #define IFNET_READER_FIRST() \ 1274 PSLIST_READER_FIRST(&ifnet_pslist, struct ifnet, if_pslist_entry) 1275 #define IFNET_READER_NEXT(__ifp) \ 1276 PSLIST_READER_NEXT((__ifp), struct ifnet, if_pslist_entry) 1277 #define IFNET_READER_FOREACH(__ifp) \ 1278 PSLIST_READER_FOREACH((__ifp), &ifnet_pslist, struct ifnet, \ 1279 if_pslist_entry) 1280 #define IFNET_WRITER_INSERT_HEAD(__ifp) \ 1281 PSLIST_WRITER_INSERT_HEAD(&ifnet_pslist, (__ifp), if_pslist_entry) 1282 #define IFNET_WRITER_REMOVE(__ifp) \ 1283 PSLIST_WRITER_REMOVE((__ifp), if_pslist_entry) 1284 #define IFNET_WRITER_FOREACH(__ifp) \ 1285 PSLIST_WRITER_FOREACH((__ifp), &ifnet_pslist, struct ifnet, \ 1286 if_pslist_entry) 1287 #define IFNET_WRITER_NEXT(__ifp) \ 1288 PSLIST_WRITER_NEXT((__ifp), struct ifnet, if_pslist_entry) 1289 #define IFNET_WRITER_INSERT_AFTER(__ifp, __new) \ 1290 PSLIST_WRITER_INSERT_AFTER((__ifp), (__new), if_pslist_entry) 1291 #define IFNET_WRITER_EMPTY() \ 1292 (PSLIST_WRITER_FIRST(&ifnet_pslist, struct ifnet, if_pslist_entry) == NULL) 1293 #define IFNET_WRITER_INSERT_TAIL(__new) \ 1294 do { \ 1295 if (IFNET_WRITER_EMPTY()) { \ 1296 IFNET_WRITER_INSERT_HEAD((__new)); \ 1297 } else { \ 1298 struct ifnet *__ifp; \ 1299 IFNET_WRITER_FOREACH(__ifp) { \ 1300 if (IFNET_WRITER_NEXT(__ifp) == NULL) { \ 1301 IFNET_WRITER_INSERT_AFTER(__ifp,\ 1302 (__new)); \ 1303 break; \ 1304 } \ 1305 } \ 1306 } \ 1307 } while (0) 1308 1309 #define IFNET_LOCK(ifp) mutex_enter((ifp)->if_ioctl_lock) 1310 #define IFNET_UNLOCK(ifp) mutex_exit((ifp)->if_ioctl_lock) 1311 #define IFNET_LOCKED(ifp) mutex_owned((ifp)->if_ioctl_lock) 1312 1313 #define IFNET_ASSERT_UNLOCKED(ifp) \ 1314 KDASSERT(mutex_ownable((ifp)->if_ioctl_lock)) 1315 1316 extern struct pslist_head ifnet_pslist; 1317 extern kmutex_t ifnet_mtx; 1318 1319 extern struct ifnet *lo0ifp; 1320 1321 /* 1322 * ifq sysctl support 1323 */ 1324 int sysctl_ifq(int *name, u_int namelen, void *oldp, 1325 size_t *oldlenp, void *newp, size_t newlen, 1326 struct ifqueue *ifq); 1327 /* symbolic names for terminal (per-protocol) CTL_IFQ_ nodes */ 1328 #define IFQCTL_LEN 1 1329 #define IFQCTL_MAXLEN 2 1330 #define IFQCTL_PEAK 3 1331 #define IFQCTL_DROPS 4 1332 1333 #endif /* _KERNEL */ 1334 1335 #endif /* !_NET_IF_H_ */ 1336
Indexes created Sun Sep 21 16:09:51 GMT 2025