1 /*- 2 * Copyright (c) 1982, 1986, 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * From: @(#)if.h 8.1 (Berkeley) 6/10/93 30 * $FreeBSD$ 31 */ 32 33 #ifndef _NET_IF_VAR_H_ 34 #define _NET_IF_VAR_H_ 35 36 /* 37 * Structures defining a network interface, providing a packet 38 * transport mechanism (ala level 0 of the PUP protocols). 39 * 40 * Each interface accepts output datagrams of a specified maximum 41 * length, and provides higher level routines with input datagrams 42 * received from its medium. 43 * 44 * Output occurs when the routine if_output is called, with three parameters: 45 * (*ifp->if_output)(ifp, m, dst, rt) 46 * Here m is the mbuf chain to be sent and dst is the destination address. 47 * The output routine encapsulates the supplied datagram if necessary, 48 * and then transmits it on its medium. 49 * 50 * On input, each interface unwraps the data received by it, and either 51 * places it on the input queue of an internetwork datagram routine 52 * and posts the associated software interrupt, or passes the datagram to a raw 53 * packet input routine. 54 * 55 * Routines exist for locating interfaces by their addresses 56 * or for locating an interface on a certain network, as well as more general 57 * routing and gateway routines maintaining information used to locate 58 * interfaces. These routines live in the files if.c and route.c 59 */ 60 61 struct rtentry; /* ifa_rtrequest */ 62 struct rt_addrinfo; /* ifa_rtrequest */ 63 struct socket; 64 struct carp_if; 65 struct carp_softc; 66 struct ifvlantrunk; 67 struct route; /* if_output */ 68 struct vnet; 69 struct ifmedia; 70 struct netmap_adapter; 71 72 #ifdef _KERNEL 73 #include <sys/mbuf.h> /* ifqueue only? */ 74 #include <sys/buf_ring.h> 75 #include <net/vnet.h> 76 #endif /* _KERNEL */ 77 #include <sys/counter.h> 78 #include <sys/lock.h> /* XXX */ 79 #include <sys/mutex.h> /* struct ifqueue */ 80 #include <sys/rwlock.h> /* XXX */ 81 #include <sys/sx.h> /* XXX */ 82 #include <sys/_task.h> /* if_link_task */ 83 84 #define IF_DUNIT_NONE -1 85 86 #include <net/altq/if_altq.h> 87 88 TAILQ_HEAD(ifnethead, ifnet); /* we use TAILQs so that the order of */ 89 TAILQ_HEAD(ifaddrhead, ifaddr); /* instantiation is preserved in the list */ 90 TAILQ_HEAD(ifmultihead, ifmultiaddr); 91 TAILQ_HEAD(ifgrouphead, ifg_group); 92 93 #ifdef _KERNEL 94 VNET_DECLARE(struct pfil_head, link_pfil_hook); /* packet filter hooks */ 95 #define V_link_pfil_hook VNET(link_pfil_hook) 96 97 #define HHOOK_IPSEC_INET 0 98 #define HHOOK_IPSEC_INET6 1 99 #define HHOOK_IPSEC_COUNT 2 100 VNET_DECLARE(struct hhook_head *, ipsec_hhh_in[HHOOK_IPSEC_COUNT]); 101 VNET_DECLARE(struct hhook_head *, ipsec_hhh_out[HHOOK_IPSEC_COUNT]); 102 #define V_ipsec_hhh_in VNET(ipsec_hhh_in) 103 #define V_ipsec_hhh_out VNET(ipsec_hhh_out) 104 #endif /* _KERNEL */ 105 106 typedef enum { 107 IFCOUNTER_IPACKETS = 0, 108 IFCOUNTER_IERRORS, 109 IFCOUNTER_OPACKETS, 110 IFCOUNTER_OERRORS, 111 IFCOUNTER_COLLISIONS, 112 IFCOUNTER_IBYTES, 113 IFCOUNTER_OBYTES, 114 IFCOUNTER_IMCASTS, 115 IFCOUNTER_OMCASTS, 116 IFCOUNTER_IQDROPS, 117 IFCOUNTER_OQDROPS, 118 IFCOUNTER_NOPROTO, 119 IFCOUNTERS /* Array size. */ 120 } ift_counter; 121 122 typedef struct ifnet * if_t; 123 124 typedef void (*if_start_fn_t)(if_t); 125 typedef int (*if_ioctl_fn_t)(if_t, u_long, caddr_t); 126 typedef void (*if_init_fn_t)(void *); 127 typedef void (*if_qflush_fn_t)(if_t); 128 typedef int (*if_transmit_fn_t)(if_t, struct mbuf *); 129 typedef uint64_t (*if_get_counter_t)(if_t, ift_counter); 130 131 struct ifnet_hw_tsomax { 132 u_int tsomaxbytes; /* TSO total burst length limit in bytes */ 133 u_int tsomaxsegcount; /* TSO maximum segment count */ 134 u_int tsomaxsegsize; /* TSO maximum segment size in bytes */ 135 }; 136 137 /* Interface encap request types */ 138 typedef enum { 139 IFENCAP_LL = 1 /* pre-calculate link-layer header */ 140 } ife_type; 141 142 /* 143 * The structure below allows to request various pre-calculated L2/L3 headers 144 * for different media. Requests varies by type (rtype field). 145 * 146 * IFENCAP_LL type: pre-calculates link header based on address family 147 * and destination lladdr. 148 * 149 * Input data fields: 150 * buf: pointer to destination buffer 151 * bufsize: buffer size 152 * flags: IFENCAP_FLAG_BROADCAST if destination is broadcast 153 * family: address family defined by AF_ constant. 154 * lladdr: pointer to link-layer address 155 * lladdr_len: length of link-layer address 156 * hdata: pointer to L3 header (optional, used for ARP requests). 157 * Output data fields: 158 * buf: encap data is stored here 159 * bufsize: resulting encap length is stored here 160 * lladdr_off: offset of link-layer address from encap hdr start 161 * hdata: L3 header may be altered if necessary 162 */ 163 164 struct if_encap_req { 165 u_char *buf; /* Destination buffer (w) */ 166 size_t bufsize; /* size of provided buffer (r) */ 167 ife_type rtype; /* request type (r) */ 168 uint32_t flags; /* Request flags (r) */ 169 int family; /* Address family AF_* (r) */ 170 int lladdr_off; /* offset from header start (w) */ 171 int lladdr_len; /* lladdr length (r) */ 172 char *lladdr; /* link-level address pointer (r) */ 173 char *hdata; /* Upper layer header data (rw) */ 174 }; 175 176 #define IFENCAP_FLAG_BROADCAST 0x02 /* Destination is broadcast */ 177 178 179 /* 180 * Structure defining a network interface. 181 */ 182 struct ifnet { 183 /* General book keeping of interface lists. */ 184 TAILQ_ENTRY(ifnet) if_link; /* all struct ifnets are chained */ 185 LIST_ENTRY(ifnet) if_clones; /* interfaces of a cloner */ 186 TAILQ_HEAD(, ifg_list) if_groups; /* linked list of groups per if */ 187 /* protected by if_addr_lock */ 188 u_char if_alloctype; /* if_type at time of allocation */ 189 190 /* Driver and protocol specific information that remains stable. */ 191 void *if_softc; /* pointer to driver state */ 192 void *if_llsoftc; /* link layer softc */ 193 void *if_l2com; /* pointer to protocol bits */ 194 const char *if_dname; /* driver name */ 195 int if_dunit; /* unit or IF_DUNIT_NONE */ 196 u_short if_index; /* numeric abbreviation for this if */ 197 short if_index_reserved; /* spare space to grow if_index */ 198 char if_xname[IFNAMSIZ]; /* external name (name + unit) */ 199 char *if_description; /* interface description */ 200 201 /* Variable fields that are touched by the stack and drivers. */ 202 int if_flags; /* up/down, broadcast, etc. */ 203 int if_drv_flags; /* driver-managed status flags */ 204 int if_capabilities; /* interface features & capabilities */ 205 int if_capenable; /* enabled features & capabilities */ 206 void *if_linkmib; /* link-type-specific MIB data */ 207 size_t if_linkmiblen; /* length of above data */ 208 u_int if_refcount; /* reference count */ 209 210 /* These fields are shared with struct if_data. */ 211 uint8_t if_type; /* ethernet, tokenring, etc */ 212 uint8_t if_addrlen; /* media address length */ 213 uint8_t if_hdrlen; /* media header length */ 214 uint8_t if_link_state; /* current link state */ 215 uint32_t if_mtu; /* maximum transmission unit */ 216 uint32_t if_metric; /* routing metric (external only) */ 217 uint64_t if_baudrate; /* linespeed */ 218 uint64_t if_hwassist; /* HW offload capabilities, see IFCAP */ 219 time_t if_epoch; /* uptime at attach or stat reset */ 220 struct timeval if_lastchange; /* time of last administrative change */ 221 222 struct ifaltq if_snd; /* output queue (includes altq) */ 223 struct task if_linktask; /* task for link change events */ 224 225 /* Addresses of different protocol families assigned to this if. */ 226 struct rwlock if_addr_lock; /* lock to protect address lists */ 227 /* 228 * if_addrhead is the list of all addresses associated to 229 * an interface. 230 * Some code in the kernel assumes that first element 231 * of the list has type AF_LINK, and contains sockaddr_dl 232 * addresses which store the link-level address and the name 233 * of the interface. 234 * However, access to the AF_LINK address through this 235 * field is deprecated. Use if_addr or ifaddr_byindex() instead. 236 */ 237 struct ifaddrhead if_addrhead; /* linked list of addresses per if */ 238 struct ifmultihead if_multiaddrs; /* multicast addresses configured */ 239 int if_amcount; /* number of all-multicast requests */ 240 struct ifaddr *if_addr; /* pointer to link-level address */ 241 const u_int8_t *if_broadcastaddr; /* linklevel broadcast bytestring */ 242 struct rwlock if_afdata_lock; 243 void *if_afdata[AF_MAX]; 244 int if_afdata_initialized; 245 246 /* Additional features hung off the interface. */ 247 u_int if_fib; /* interface FIB */ 248 struct vnet *if_vnet; /* pointer to network stack instance */ 249 struct vnet *if_home_vnet; /* where this ifnet originates from */ 250 struct ifvlantrunk *if_vlantrunk; /* pointer to 802.1q data */ 251 struct bpf_if *if_bpf; /* packet filter structure */ 252 int if_pcount; /* number of promiscuous listeners */ 253 void *if_bridge; /* bridge glue */ 254 void *if_lagg; /* lagg glue */ 255 void *if_pf_kif; /* pf glue */ 256 struct carp_if *if_carp; /* carp interface structure */ 257 struct label *if_label; /* interface MAC label */ 258 struct netmap_adapter *if_netmap; /* netmap(4) softc */ 259 260 /* Various procedures of the layer2 encapsulation and drivers. */ 261 int (*if_output) /* output routine (enqueue) */ 262 (struct ifnet *, struct mbuf *, const struct sockaddr *, 263 struct route *); 264 void (*if_input) /* input routine (from h/w driver) */ 265 (struct ifnet *, struct mbuf *); 266 if_start_fn_t if_start; /* initiate output routine */ 267 if_ioctl_fn_t if_ioctl; /* ioctl routine */ 268 if_init_fn_t if_init; /* Init routine */ 269 int (*if_resolvemulti) /* validate/resolve multicast */ 270 (struct ifnet *, struct sockaddr **, struct sockaddr *); 271 if_qflush_fn_t if_qflush; /* flush any queue */ 272 if_transmit_fn_t if_transmit; /* initiate output routine */ 273 274 void (*if_reassign) /* reassign to vnet routine */ 275 (struct ifnet *, struct vnet *, char *); 276 if_get_counter_t if_get_counter; /* get counter values */ 277 int (*if_requestencap) /* make link header from request */ 278 (struct ifnet *, struct if_encap_req *); 279 280 /* Statistics. */ 281 counter_u64_t if_counters[IFCOUNTERS]; 282 283 /* Stuff that's only temporary and doesn't belong here. */ 284 285 /* 286 * Network adapter TSO limits: 287 * =========================== 288 * 289 * If the "if_hw_tsomax" field is zero the maximum segment 290 * length limit does not apply. If the "if_hw_tsomaxsegcount" 291 * or the "if_hw_tsomaxsegsize" field is zero the TSO segment 292 * count limit does not apply. If all three fields are zero, 293 * there is no TSO limit. 294 * 295 * NOTE: The TSO limits should reflect the values used in the 296 * BUSDMA tag a network adapter is using to load a mbuf chain 297 * for transmission. The TCP/IP network stack will subtract 298 * space for all linklevel and protocol level headers and 299 * ensure that the full mbuf chain passed to the network 300 * adapter fits within the given limits. 301 */ 302 u_int if_hw_tsomax; /* TSO maximum size in bytes */ 303 u_int if_hw_tsomaxsegcount; /* TSO maximum segment count */ 304 u_int if_hw_tsomaxsegsize; /* TSO maximum segment size in bytes */ 305 306 /* 307 * Spare fields to be added before branching a stable branch, so 308 * that structure can be enhanced without changing the kernel 309 * binary interface. 310 */ 311 void *if_pspare[4]; /* packet pacing / general use */ 312 int if_ispare[4]; /* packet pacing / general use */ 313 }; 314 315 /* for compatibility with other BSDs */ 316 #define if_list if_link 317 #define if_name(ifp) ((ifp)->if_xname) 318 319 /* 320 * Locks for address lists on the network interface. 321 */ 322 #define IF_ADDR_LOCK_INIT(if) rw_init(&(if)->if_addr_lock, "if_addr_lock") 323 #define IF_ADDR_LOCK_DESTROY(if) rw_destroy(&(if)->if_addr_lock) 324 #define IF_ADDR_WLOCK(if) rw_wlock(&(if)->if_addr_lock) 325 #define IF_ADDR_WUNLOCK(if) rw_wunlock(&(if)->if_addr_lock) 326 #define IF_ADDR_RLOCK(if) rw_rlock(&(if)->if_addr_lock) 327 #define IF_ADDR_RUNLOCK(if) rw_runlock(&(if)->if_addr_lock) 328 #define IF_ADDR_LOCK_ASSERT(if) rw_assert(&(if)->if_addr_lock, RA_LOCKED) 329 #define IF_ADDR_WLOCK_ASSERT(if) rw_assert(&(if)->if_addr_lock, RA_WLOCKED) 330 331 /* 332 * Function variations on locking macros intended to be used by loadable 333 * kernel modules in order to divorce them from the internals of address list 334 * locking. 335 */ 336 void if_addr_rlock(struct ifnet *ifp); /* if_addrhead */ 337 void if_addr_runlock(struct ifnet *ifp); /* if_addrhead */ 338 void if_maddr_rlock(if_t ifp); /* if_multiaddrs */ 339 void if_maddr_runlock(if_t ifp); /* if_multiaddrs */ 340 341 #ifdef _KERNEL 342 #ifdef _SYS_EVENTHANDLER_H_ 343 /* interface link layer address change event */ 344 typedef void (*iflladdr_event_handler_t)(void *, struct ifnet *); 345 EVENTHANDLER_DECLARE(iflladdr_event, iflladdr_event_handler_t); 346 /* interface address change event */ 347 typedef void (*ifaddr_event_handler_t)(void *, struct ifnet *); 348 EVENTHANDLER_DECLARE(ifaddr_event, ifaddr_event_handler_t); 349 /* new interface arrival event */ 350 typedef void (*ifnet_arrival_event_handler_t)(void *, struct ifnet *); 351 EVENTHANDLER_DECLARE(ifnet_arrival_event, ifnet_arrival_event_handler_t); 352 /* interface departure event */ 353 typedef void (*ifnet_departure_event_handler_t)(void *, struct ifnet *); 354 EVENTHANDLER_DECLARE(ifnet_departure_event, ifnet_departure_event_handler_t); 355 /* Interface link state change event */ 356 typedef void (*ifnet_link_event_handler_t)(void *, struct ifnet *, int); 357 EVENTHANDLER_DECLARE(ifnet_link_event, ifnet_link_event_handler_t); 358 #endif /* _SYS_EVENTHANDLER_H_ */ 359 360 /* 361 * interface groups 362 */ 363 struct ifg_group { 364 char ifg_group[IFNAMSIZ]; 365 u_int ifg_refcnt; 366 void *ifg_pf_kif; 367 TAILQ_HEAD(, ifg_member) ifg_members; 368 TAILQ_ENTRY(ifg_group) ifg_next; 369 }; 370 371 struct ifg_member { 372 TAILQ_ENTRY(ifg_member) ifgm_next; 373 struct ifnet *ifgm_ifp; 374 }; 375 376 struct ifg_list { 377 struct ifg_group *ifgl_group; 378 TAILQ_ENTRY(ifg_list) ifgl_next; 379 }; 380 381 #ifdef _SYS_EVENTHANDLER_H_ 382 /* group attach event */ 383 typedef void (*group_attach_event_handler_t)(void *, struct ifg_group *); 384 EVENTHANDLER_DECLARE(group_attach_event, group_attach_event_handler_t); 385 /* group detach event */ 386 typedef void (*group_detach_event_handler_t)(void *, struct ifg_group *); 387 EVENTHANDLER_DECLARE(group_detach_event, group_detach_event_handler_t); 388 /* group change event */ 389 typedef void (*group_change_event_handler_t)(void *, const char *); 390 EVENTHANDLER_DECLARE(group_change_event, group_change_event_handler_t); 391 #endif /* _SYS_EVENTHANDLER_H_ */ 392 393 #define IF_AFDATA_LOCK_INIT(ifp) \ 394 rw_init(&(ifp)->if_afdata_lock, "if_afdata") 395 396 #define IF_AFDATA_WLOCK(ifp) rw_wlock(&(ifp)->if_afdata_lock) 397 #define IF_AFDATA_RLOCK(ifp) rw_rlock(&(ifp)->if_afdata_lock) 398 #define IF_AFDATA_WUNLOCK(ifp) rw_wunlock(&(ifp)->if_afdata_lock) 399 #define IF_AFDATA_RUNLOCK(ifp) rw_runlock(&(ifp)->if_afdata_lock) 400 #define IF_AFDATA_LOCK(ifp) IF_AFDATA_WLOCK(ifp) 401 #define IF_AFDATA_UNLOCK(ifp) IF_AFDATA_WUNLOCK(ifp) 402 #define IF_AFDATA_TRYLOCK(ifp) rw_try_wlock(&(ifp)->if_afdata_lock) 403 #define IF_AFDATA_DESTROY(ifp) rw_destroy(&(ifp)->if_afdata_lock) 404 405 #define IF_AFDATA_LOCK_ASSERT(ifp) rw_assert(&(ifp)->if_afdata_lock, RA_LOCKED) 406 #define IF_AFDATA_RLOCK_ASSERT(ifp) rw_assert(&(ifp)->if_afdata_lock, RA_RLOCKED) 407 #define IF_AFDATA_WLOCK_ASSERT(ifp) rw_assert(&(ifp)->if_afdata_lock, RA_WLOCKED) 408 #define IF_AFDATA_UNLOCK_ASSERT(ifp) rw_assert(&(ifp)->if_afdata_lock, RA_UNLOCKED) 409 410 /* 411 * 72 was chosen below because it is the size of a TCP/IP 412 * header (40) + the minimum mss (32). 413 */ 414 #define IF_MINMTU 72 415 #define IF_MAXMTU 65535 416 417 #define TOEDEV(ifp) ((ifp)->if_llsoftc) 418 419 /* 420 * The ifaddr structure contains information about one address 421 * of an interface. They are maintained by the different address families, 422 * are allocated and attached when an address is set, and are linked 423 * together so all addresses for an interface can be located. 424 * 425 * NOTE: a 'struct ifaddr' is always at the beginning of a larger 426 * chunk of malloc'ed memory, where we store the three addresses 427 * (ifa_addr, ifa_dstaddr and ifa_netmask) referenced here. 428 */ 429 struct ifaddr { 430 struct sockaddr *ifa_addr; /* address of interface */ 431 struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */ 432 #define ifa_broadaddr ifa_dstaddr /* broadcast address interface */ 433 struct sockaddr *ifa_netmask; /* used to determine subnet */ 434 struct ifnet *ifa_ifp; /* back-pointer to interface */ 435 struct carp_softc *ifa_carp; /* pointer to CARP data */ 436 TAILQ_ENTRY(ifaddr) ifa_link; /* queue macro glue */ 437 void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */ 438 (int, struct rtentry *, struct rt_addrinfo *); 439 u_short ifa_flags; /* mostly rt_flags for cloning */ 440 #define IFA_ROUTE RTF_UP /* route installed */ 441 #define IFA_RTSELF RTF_HOST /* loopback route to self installed */ 442 u_int ifa_refcnt; /* references to this structure */ 443 444 counter_u64_t ifa_ipackets; 445 counter_u64_t ifa_opackets; 446 counter_u64_t ifa_ibytes; 447 counter_u64_t ifa_obytes; 448 }; 449 450 struct ifaddr * ifa_alloc(size_t size, int flags); 451 void ifa_free(struct ifaddr *ifa); 452 void ifa_ref(struct ifaddr *ifa); 453 454 /* 455 * Multicast address structure. This is analogous to the ifaddr 456 * structure except that it keeps track of multicast addresses. 457 */ 458 struct ifmultiaddr { 459 TAILQ_ENTRY(ifmultiaddr) ifma_link; /* queue macro glue */ 460 struct sockaddr *ifma_addr; /* address this membership is for */ 461 struct sockaddr *ifma_lladdr; /* link-layer translation, if any */ 462 struct ifnet *ifma_ifp; /* back-pointer to interface */ 463 u_int ifma_refcount; /* reference count */ 464 void *ifma_protospec; /* protocol-specific state, if any */ 465 struct ifmultiaddr *ifma_llifma; /* pointer to ifma for ifma_lladdr */ 466 }; 467 468 extern struct rwlock ifnet_rwlock; 469 extern struct sx ifnet_sxlock; 470 471 #define IFNET_WLOCK() do { \ 472 sx_xlock(&ifnet_sxlock); \ 473 rw_wlock(&ifnet_rwlock); \ 474 } while (0) 475 476 #define IFNET_WUNLOCK() do { \ 477 rw_wunlock(&ifnet_rwlock); \ 478 sx_xunlock(&ifnet_sxlock); \ 479 } while (0) 480 481 /* 482 * To assert the ifnet lock, you must know not only whether it's for read or 483 * write, but also whether it was acquired with sleep support or not. 484 */ 485 #define IFNET_RLOCK_ASSERT() sx_assert(&ifnet_sxlock, SA_SLOCKED) 486 #define IFNET_RLOCK_NOSLEEP_ASSERT() rw_assert(&ifnet_rwlock, RA_RLOCKED) 487 #define IFNET_WLOCK_ASSERT() do { \ 488 sx_assert(&ifnet_sxlock, SA_XLOCKED); \ 489 rw_assert(&ifnet_rwlock, RA_WLOCKED); \ 490 } while (0) 491 492 #define IFNET_RLOCK() sx_slock(&ifnet_sxlock) 493 #define IFNET_RLOCK_NOSLEEP() rw_rlock(&ifnet_rwlock) 494 #define IFNET_RUNLOCK() sx_sunlock(&ifnet_sxlock) 495 #define IFNET_RUNLOCK_NOSLEEP() rw_runlock(&ifnet_rwlock) 496 497 /* 498 * Look up an ifnet given its index; the _ref variant also acquires a 499 * reference that must be freed using if_rele(). It is almost always a bug 500 * to call ifnet_byindex() instead if ifnet_byindex_ref(). 501 */ 502 struct ifnet *ifnet_byindex(u_short idx); 503 struct ifnet *ifnet_byindex_locked(u_short idx); 504 struct ifnet *ifnet_byindex_ref(u_short idx); 505 506 /* 507 * Given the index, ifaddr_byindex() returns the one and only 508 * link-level ifaddr for the interface. You are not supposed to use 509 * it to traverse the list of addresses associated to the interface. 510 */ 511 struct ifaddr *ifaddr_byindex(u_short idx); 512 513 VNET_DECLARE(struct ifnethead, ifnet); 514 VNET_DECLARE(struct ifgrouphead, ifg_head); 515 VNET_DECLARE(int, if_index); 516 VNET_DECLARE(struct ifnet *, loif); /* first loopback interface */ 517 518 #define V_ifnet VNET(ifnet) 519 #define V_ifg_head VNET(ifg_head) 520 #define V_if_index VNET(if_index) 521 #define V_loif VNET(loif) 522 523 int if_addgroup(struct ifnet *, const char *); 524 int if_delgroup(struct ifnet *, const char *); 525 int if_addmulti(struct ifnet *, struct sockaddr *, struct ifmultiaddr **); 526 int if_allmulti(struct ifnet *, int); 527 struct ifnet* if_alloc(u_char); 528 void if_attach(struct ifnet *); 529 void if_dead(struct ifnet *); 530 int if_delmulti(struct ifnet *, struct sockaddr *); 531 void if_delmulti_ifma(struct ifmultiaddr *); 532 void if_detach(struct ifnet *); 533 void if_purgeaddrs(struct ifnet *); 534 void if_delallmulti(struct ifnet *); 535 void if_down(struct ifnet *); 536 struct ifmultiaddr * 537 if_findmulti(struct ifnet *, const struct sockaddr *); 538 void if_free(struct ifnet *); 539 void if_initname(struct ifnet *, const char *, int); 540 void if_link_state_change(struct ifnet *, int); 541 int if_printf(struct ifnet *, const char *, ...) __printflike(2, 3); 542 void if_ref(struct ifnet *); 543 void if_rele(struct ifnet *); 544 int if_setlladdr(struct ifnet *, const u_char *, int); 545 void if_up(struct ifnet *); 546 int ifioctl(struct socket *, u_long, caddr_t, struct thread *); 547 int ifpromisc(struct ifnet *, int); 548 struct ifnet *ifunit(const char *); 549 struct ifnet *ifunit_ref(const char *); 550 551 int ifa_add_loopback_route(struct ifaddr *, struct sockaddr *); 552 int ifa_del_loopback_route(struct ifaddr *, struct sockaddr *); 553 int ifa_switch_loopback_route(struct ifaddr *, struct sockaddr *); 554 555 struct ifaddr *ifa_ifwithaddr(const struct sockaddr *); 556 int ifa_ifwithaddr_check(const struct sockaddr *); 557 struct ifaddr *ifa_ifwithbroadaddr(const struct sockaddr *, int); 558 struct ifaddr *ifa_ifwithdstaddr(const struct sockaddr *, int); 559 struct ifaddr *ifa_ifwithnet(const struct sockaddr *, int, int); 560 struct ifaddr *ifa_ifwithroute(int, const struct sockaddr *, struct sockaddr *, 561 u_int); 562 struct ifaddr *ifaof_ifpforaddr(const struct sockaddr *, struct ifnet *); 563 int ifa_preferred(struct ifaddr *, struct ifaddr *); 564 565 int if_simloop(struct ifnet *ifp, struct mbuf *m, int af, int hlen); 566 567 typedef void *if_com_alloc_t(u_char type, struct ifnet *ifp); 568 typedef void if_com_free_t(void *com, u_char type); 569 void if_register_com_alloc(u_char type, if_com_alloc_t *a, if_com_free_t *f); 570 void if_deregister_com_alloc(u_char type); 571 void if_data_copy(struct ifnet *, struct if_data *); 572 uint64_t if_get_counter_default(struct ifnet *, ift_counter); 573 void if_inc_counter(struct ifnet *, ift_counter, int64_t); 574 575 #define IF_LLADDR(ifp) \ 576 LLADDR((struct sockaddr_dl *)((ifp)->if_addr->ifa_addr)) 577 578 uint64_t if_setbaudrate(if_t ifp, uint64_t baudrate); 579 uint64_t if_getbaudrate(if_t ifp); 580 int if_setcapabilities(if_t ifp, int capabilities); 581 int if_setcapabilitiesbit(if_t ifp, int setbit, int clearbit); 582 int if_getcapabilities(if_t ifp); 583 int if_togglecapenable(if_t ifp, int togglecap); 584 int if_setcapenable(if_t ifp, int capenable); 585 int if_setcapenablebit(if_t ifp, int setcap, int clearcap); 586 int if_getcapenable(if_t ifp); 587 const char *if_getdname(if_t ifp); 588 int if_setdev(if_t ifp, void *dev); 589 int if_setdrvflagbits(if_t ifp, int if_setflags, int clear_flags); 590 int if_getdrvflags(if_t ifp); 591 int if_setdrvflags(if_t ifp, int flags); 592 int if_clearhwassist(if_t ifp); 593 int if_sethwassistbits(if_t ifp, int toset, int toclear); 594 int if_sethwassist(if_t ifp, int hwassist_bit); 595 int if_gethwassist(if_t ifp); 596 int if_setsoftc(if_t ifp, void *softc); 597 void *if_getsoftc(if_t ifp); 598 int if_setflags(if_t ifp, int flags); 599 int if_setmtu(if_t ifp, int mtu); 600 int if_getmtu(if_t ifp); 601 int if_getmtu_family(if_t ifp, int family); 602 int if_setflagbits(if_t ifp, int set, int clear); 603 int if_getflags(if_t ifp); 604 int if_sendq_empty(if_t ifp); 605 int if_setsendqready(if_t ifp); 606 int if_setsendqlen(if_t ifp, int tx_desc_count); 607 int if_input(if_t ifp, struct mbuf* sendmp); 608 int if_sendq_prepend(if_t ifp, struct mbuf *m); 609 struct mbuf *if_dequeue(if_t ifp); 610 int if_setifheaderlen(if_t ifp, int len); 611 void if_setrcvif(struct mbuf *m, if_t ifp); 612 void if_setvtag(struct mbuf *m, u_int16_t tag); 613 u_int16_t if_getvtag(struct mbuf *m); 614 int if_vlantrunkinuse(if_t ifp); 615 caddr_t if_getlladdr(if_t ifp); 616 void *if_gethandle(u_char); 617 void if_bpfmtap(if_t ifp, struct mbuf *m); 618 void if_etherbpfmtap(if_t ifp, struct mbuf *m); 619 void if_vlancap(if_t ifp); 620 621 int if_setupmultiaddr(if_t ifp, void *mta, int *cnt, int max); 622 int if_multiaddr_array(if_t ifp, void *mta, int *cnt, int max); 623 int if_multiaddr_count(if_t ifp, int max); 624 625 int if_multi_apply(struct ifnet *ifp, int (*filter)(void *, struct ifmultiaddr *, int), void *arg); 626 int if_getamcount(if_t ifp); 627 struct ifaddr * if_getifaddr(if_t ifp); 628 629 /* Functions */ 630 void if_setinitfn(if_t ifp, void (*)(void *)); 631 void if_setioctlfn(if_t ifp, int (*)(if_t, u_long, caddr_t)); 632 void if_setstartfn(if_t ifp, void (*)(if_t)); 633 void if_settransmitfn(if_t ifp, if_transmit_fn_t); 634 void if_setqflushfn(if_t ifp, if_qflush_fn_t); 635 void if_setgetcounterfn(if_t ifp, if_get_counter_t); 636 637 /* Revisit the below. These are inline functions originally */ 638 int drbr_inuse_drv(if_t ifp, struct buf_ring *br); 639 struct mbuf* drbr_dequeue_drv(if_t ifp, struct buf_ring *br); 640 int drbr_needs_enqueue_drv(if_t ifp, struct buf_ring *br); 641 int drbr_enqueue_drv(if_t ifp, struct buf_ring *br, struct mbuf *m); 642 643 /* TSO */ 644 void if_hw_tsomax_common(if_t ifp, struct ifnet_hw_tsomax *); 645 int if_hw_tsomax_update(if_t ifp, struct ifnet_hw_tsomax *); 646 647 #ifdef DEVICE_POLLING 648 enum poll_cmd { POLL_ONLY, POLL_AND_CHECK_STATUS }; 649 650 typedef int poll_handler_t(if_t ifp, enum poll_cmd cmd, int count); 651 int ether_poll_register(poll_handler_t *h, if_t ifp); 652 int ether_poll_deregister(if_t ifp); 653 #endif /* DEVICE_POLLING */ 654 655 #endif /* _KERNEL */ 656 657 #include <net/ifq.h> /* XXXAO: temporary unconditional include */ 658 659 #endif /* !_NET_IF_VAR_H_ */ 660