sys/net/if_var.h

   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 #ifdef __STDC__
  62 /*
  63  * Forward structure declarations for function prototypes [sic].
  64  */
  65 struct  mbuf;
  66 struct  thread;
  67 struct  rtentry;
  68 struct  rt_addrinfo;
  69 struct  socket;
  70 struct  ether_header;
  71 struct  carp_if;
  72 struct  carp_softc;
  73 struct  ifvlantrunk;
  74 struct  route;
  75 struct  vnet;
  76 #endif
  77
  78 #include <sys/queue.h>          /* get TAILQ macros */
  79
  80 #ifdef _KERNEL
  81 #include <sys/mbuf.h>
  82 #include <sys/eventhandler.h>
  83 #include <sys/buf_ring.h>
  84 #include <net/vnet.h>
  85 #endif /* _KERNEL */
  86 #include <sys/lock.h>           /* XXX */
  87 #include <sys/mutex.h>          /* XXX */
  88 #include <sys/rwlock.h>         /* XXX */
  89 #include <sys/sx.h>             /* XXX */
  90 #include <sys/event.h>          /* XXX */
  91 #include <sys/_task.h>
  92
  93 #define IF_DUNIT_NONE   -1
  94
  95 #include <altq/if_altq.h>
  96
  97 TAILQ_HEAD(ifnethead, ifnet);   /* we use TAILQs so that the order of */
  98 TAILQ_HEAD(ifaddrhead, ifaddr); /* instantiation is preserved in the list */
  99 TAILQ_HEAD(ifmultihead, ifmultiaddr);
 100 TAILQ_HEAD(ifgrouphead, ifg_group);
 101
 102 #ifdef _KERNEL
 103 VNET_DECLARE(struct pfil_head, link_pfil_hook); /* packet filter hooks */
 104 #define V_link_pfil_hook        VNET(link_pfil_hook)
 105 #endif /* _KERNEL */
 106
 107 typedef enum {
 108         IFCOUNTER_IPACKETS = 0,
 109         IFCOUNTER_IERRORS,
 110         IFCOUNTER_OPACKETS,
 111         IFCOUNTER_OERRORS,
 112         IFCOUNTER_COLLISIONS,
 113         IFCOUNTER_IBYTES,
 114         IFCOUNTER_OBYTES,
 115         IFCOUNTER_IMCASTS,
 116         IFCOUNTER_OMCASTS,
 117         IFCOUNTER_IQDROPS,
 118         IFCOUNTER_OQDROPS,
 119         IFCOUNTER_NOPROTO,
 120         IFCOUNTERS /* Array size. */
 121 } ift_counter;
 122
 123 /*
 124  * Structure defining a queue for a network interface.
 125  */
 126 struct  ifqueue {
 127         struct  mbuf *ifq_head;
 128         struct  mbuf *ifq_tail;
 129         int     ifq_len;
 130         int     ifq_maxlen;
 131         int     ifq_drops;
 132         struct  mtx ifq_mtx;
 133 };
 134
 135 struct ifnet_hw_tsomax {
 136         u_int   tsomaxbytes;    /* TSO total burst length limit in bytes */
 137         u_int   tsomaxsegcount; /* TSO maximum segment count */
 138         u_int   tsomaxsegsize;  /* TSO maximum segment size in bytes */
 139 };
 140
 141 /*
 142  * Structure defining a network interface.
 143  *
 144  * (Would like to call this struct ``if'', but C isn't PL/1.)
 145  */
 146
 147 struct ifnet {
 148         void    *if_softc;              /* pointer to driver state */
 149         void    *if_l2com;              /* pointer to protocol bits */
 150         struct vnet *if_vnet;           /* pointer to network stack instance */
 151         TAILQ_ENTRY(ifnet) if_link;     /* all struct ifnets are chained */
 152         char    if_xname[IFNAMSIZ];     /* external name (name + unit) */
 153         const char *if_dname;           /* driver name */
 154         int     if_dunit;               /* unit or IF_DUNIT_NONE */
 155         u_int   if_refcount;            /* reference count */
 156         struct  ifaddrhead if_addrhead; /* linked list of addresses per if */
 157                 /*
 158                  * if_addrhead is the list of all addresses associated to
 159                  * an interface.
 160                  * Some code in the kernel assumes that first element
 161                  * of the list has type AF_LINK, and contains sockaddr_dl
 162                  * addresses which store the link-level address and the name
 163                  * of the interface.
 164                  * However, access to the AF_LINK address through this
 165                  * field is deprecated. Use if_addr or ifaddr_byindex() instead.
 166                  */
 167         int     if_pcount;              /* number of promiscuous listeners */
 168         struct  carp_if *if_carp;       /* carp interface structure */
 169         struct  bpf_if *if_bpf;         /* packet filter structure */
 170         u_short if_index;               /* numeric abbreviation for this if  */
 171         short   if_index_reserved;      /* spare space to grow if_index */
 172         struct  ifvlantrunk *if_vlantrunk; /* pointer to 802.1q data */
 173         int     if_flags;               /* up/down, broadcast, etc. */
 174         int     if_capabilities;        /* interface features & capabilities */
 175         int     if_capenable;           /* enabled features & capabilities */
 176         void    *if_linkmib;            /* link-type-specific MIB data */
 177         size_t  if_linkmiblen;          /* length of above data */
 178         struct  if_data if_data;
 179         struct  ifmultihead if_multiaddrs; /* multicast addresses configured */
 180         int     if_amcount;             /* number of all-multicast requests */
 181 /* procedure handles */
 182         int     (*if_output)            /* output routine (enqueue) */
 183                 (struct ifnet *, struct mbuf *, const struct sockaddr *,
 184                      struct route *);
 185         void    (*if_input)             /* input routine (from h/w driver) */
 186                 (struct ifnet *, struct mbuf *);
 187         void    (*if_start)             /* initiate output routine */
 188                 (struct ifnet *);
 189         int     (*if_ioctl)             /* ioctl routine */
 190                 (struct ifnet *, u_long, caddr_t);
 191         void    (*if_init)              /* Init routine */
 192                 (void *);
 193         int     (*if_resolvemulti)      /* validate/resolve multicast */
 194                 (struct ifnet *, struct sockaddr **, struct sockaddr *);
 195         void    (*if_qflush)            /* flush any queues */
 196                 (struct ifnet *);
 197         int     (*if_transmit)          /* initiate output routine */
 198                 (struct ifnet *, struct mbuf *);
 199         void    (*if_reassign)          /* reassign to vnet routine */
 200                 (struct ifnet *, struct vnet *, char *);
 201         struct  vnet *if_home_vnet;     /* where this ifnet originates from */
 202         struct  ifaddr  *if_addr;       /* pointer to link-level address */
 203         void    *if_llsoftc;            /* link layer softc */
 204         int     if_drv_flags;           /* driver-managed status flags */
 205         struct  ifaltq if_snd;          /* output queue (includes altq) */
 206         const u_int8_t *if_broadcastaddr; /* linklevel broadcast bytestring */
 207
 208         void    *if_bridge;             /* bridge glue */
 209
 210         struct  label *if_label;        /* interface MAC label */
 211
 212         /* these are only used by IPv6 */
 213         void    *if_unused[2];
 214         void    *if_afdata[AF_MAX];
 215         int     if_afdata_initialized;
 216         struct  rwlock if_afdata_lock;
 217         struct  task if_linktask;       /* task for link change events */
 218         struct  rwlock if_addr_lock;    /* lock to protect address lists */
 219
 220         LIST_ENTRY(ifnet) if_clones;    /* interfaces of a cloner */
 221         TAILQ_HEAD(, ifg_list) if_groups; /* linked list of groups per if */
 222                                         /* protected by if_addr_lock */
 223         void    *if_pf_kif;
 224         void    *if_lagg;               /* lagg glue */
 225         char    *if_description;        /* interface description */
 226         u_int   if_fib;                 /* interface FIB */
 227         u_char  if_alloctype;           /* if_type at time of allocation */
 228
 229         /*
 230          * Network adapter TSO limits:
 231          * ===========================
 232          *
 233          * If the "if_hw_tsomax" field is zero the maximum segment
 234          * length limit does not apply. If the "if_hw_tsomaxsegcount"
 235          * or the "if_hw_tsomaxsegsize" field is zero the TSO segment
 236          * count limit does not apply. If all three fields are zero,
 237          * there is no TSO limit.
 238          *
 239          * NOTE: The TSO limits only apply to the data payload part of
 240          * a TCP/IP packet. That means there is no need to subtract
 241          * space for ethernet-, vlan-, IP- or TCP- headers from the
 242          * TSO limits unless the hardware driver in question requires
 243          * so.
 244          */
 245         u_int   if_hw_tsomax;
 246
 247         /*
 248          * Spare fields are added so that we can modify sensitive data
 249          * structures without changing the kernel binary interface, and must
 250          * be used with care where binary compatibility is required.
 251          */
 252         char    if_cspare[3];
 253         int     if_ispare[2];
 254
 255         /*
 256          * TSO fields for segment limits. If a field is zero below,
 257          * there is no limit:
 258          */
 259         u_int   if_hw_tsomaxsegcount;   /* TSO maximum segment count */
 260         u_int   if_hw_tsomaxsegsize;    /* TSO maximum segment size in bytes */
 261         void    *if_pspare[8];          /* 1 netmap, 7 TDB */
 262 };
 263
 264 typedef void if_init_f_t(void *);
 265
 266 /*
 267  * XXX These aliases are terribly dangerous because they could apply
 268  * to anything.
 269  */
 270 #define if_mtu          if_data.ifi_mtu
 271 #define if_type         if_data.ifi_type
 272 #define if_physical     if_data.ifi_physical
 273 #define if_addrlen      if_data.ifi_addrlen
 274 #define if_hdrlen       if_data.ifi_hdrlen
 275 #define if_metric       if_data.ifi_metric
 276 #define if_link_state   if_data.ifi_link_state
 277 #define if_baudrate     if_data.ifi_baudrate
 278 #define if_baudrate_pf  if_data.ifi_baudrate_pf
 279 #define if_hwassist     if_data.ifi_hwassist
 280 #define if_ipackets     if_data.ifi_ipackets
 281 #define if_ierrors      if_data.ifi_ierrors
 282 #define if_opackets     if_data.ifi_opackets
 283 #define if_oerrors      if_data.ifi_oerrors
 284 #define if_collisions   if_data.ifi_collisions
 285 #define if_ibytes       if_data.ifi_ibytes
 286 #define if_obytes       if_data.ifi_obytes
 287 #define if_imcasts      if_data.ifi_imcasts
 288 #define if_omcasts      if_data.ifi_omcasts
 289 #define if_iqdrops      if_data.ifi_iqdrops
 290 #define if_noproto      if_data.ifi_noproto
 291 #define if_lastchange   if_data.ifi_lastchange
 292
 293 /* for compatibility with other BSDs */
 294 #define if_addrlist     if_addrhead
 295 #define if_list         if_link
 296 #define if_name(ifp)    ((ifp)->if_xname)
 297
 298 /*
 299  * Locks for address lists on the network interface.
 300  */
 301 #define IF_ADDR_LOCK_INIT(if)   rw_init(&(if)->if_addr_lock, "if_addr_lock")
 302 #define IF_ADDR_LOCK_DESTROY(if)        rw_destroy(&(if)->if_addr_lock)
 303 #define IF_ADDR_WLOCK(if)       rw_wlock(&(if)->if_addr_lock)
 304 #define IF_ADDR_WUNLOCK(if)     rw_wunlock(&(if)->if_addr_lock)
 305 #define IF_ADDR_RLOCK(if)       rw_rlock(&(if)->if_addr_lock)
 306 #define IF_ADDR_RUNLOCK(if)     rw_runlock(&(if)->if_addr_lock)
 307 #define IF_ADDR_LOCK_ASSERT(if) rw_assert(&(if)->if_addr_lock, RA_LOCKED)
 308 #define IF_ADDR_WLOCK_ASSERT(if) rw_assert(&(if)->if_addr_lock, RA_WLOCKED)
 309
 310 /*
 311  * Function variations on locking macros intended to be used by loadable
 312  * kernel modules in order to divorce them from the internals of address list
 313  * locking.
 314  */
 315 void    if_addr_rlock(struct ifnet *ifp);       /* if_addrhead */
 316 void    if_addr_runlock(struct ifnet *ifp);     /* if_addrhead */
 317 void    if_maddr_rlock(struct ifnet *ifp);      /* if_multiaddrs */
 318 void    if_maddr_runlock(struct ifnet *ifp);    /* if_multiaddrs */
 319
 320 /*
 321  * Output queues (ifp->if_snd) and slow device input queues (*ifp->if_slowq)
 322  * are queues of messages stored on ifqueue structures
 323  * (defined above).  Entries are added to and deleted from these structures
 324  * by these macros.
 325  */
 326 #define IF_LOCK(ifq)            mtx_lock(&(ifq)->ifq_mtx)
 327 #define IF_UNLOCK(ifq)          mtx_unlock(&(ifq)->ifq_mtx)
 328 #define IF_LOCK_ASSERT(ifq)     mtx_assert(&(ifq)->ifq_mtx, MA_OWNED)
 329 #define _IF_QFULL(ifq)          ((ifq)->ifq_len >= (ifq)->ifq_maxlen)
 330 #define _IF_DROP(ifq)           ((ifq)->ifq_drops++)
 331 #define _IF_QLEN(ifq)           ((ifq)->ifq_len)
 332
 333 #define _IF_ENQUEUE(ifq, m) do {                                \
 334         (m)->m_nextpkt = NULL;                                  \
 335         if ((ifq)->ifq_tail == NULL)                            \
 336                 (ifq)->ifq_head = m;                            \
 337         else                                                    \
 338                 (ifq)->ifq_tail->m_nextpkt = m;                 \
 339         (ifq)->ifq_tail = m;                                    \
 340         (ifq)->ifq_len++;                                       \
 341 } while (0)
 342
 343 #define IF_ENQUEUE(ifq, m) do {                                 \
 344         IF_LOCK(ifq);                                           \
 345         _IF_ENQUEUE(ifq, m);                                    \
 346         IF_UNLOCK(ifq);                                         \
 347 } while (0)
 348
 349 #define _IF_PREPEND(ifq, m) do {                                \
 350         (m)->m_nextpkt = (ifq)->ifq_head;                       \
 351         if ((ifq)->ifq_tail == NULL)                            \
 352                 (ifq)->ifq_tail = (m);                          \
 353         (ifq)->ifq_head = (m);                                  \
 354         (ifq)->ifq_len++;                                       \
 355 } while (0)
 356
 357 #define IF_PREPEND(ifq, m) do {                                 \
 358         IF_LOCK(ifq);                                           \
 359         _IF_PREPEND(ifq, m);                                    \
 360         IF_UNLOCK(ifq);                                         \
 361 } while (0)
 362
 363 #define _IF_DEQUEUE(ifq, m) do {                                \
 364         (m) = (ifq)->ifq_head;                                  \
 365         if (m) {                                                \
 366                 if (((ifq)->ifq_head = (m)->m_nextpkt) == NULL) \
 367                         (ifq)->ifq_tail = NULL;                 \
 368                 (m)->m_nextpkt = NULL;                          \
 369                 (ifq)->ifq_len--;                               \
 370         }                                                       \
 371 } while (0)
 372
 373 #define IF_DEQUEUE(ifq, m) do {                                 \
 374         IF_LOCK(ifq);                                           \
 375         _IF_DEQUEUE(ifq, m);                                    \
 376         IF_UNLOCK(ifq);                                         \
 377 } while (0)
 378
 379 #define _IF_DEQUEUE_ALL(ifq, m) do {                            \
 380         (m) = (ifq)->ifq_head;                                  \
 381         (ifq)->ifq_head = (ifq)->ifq_tail = NULL;               \
 382         (ifq)->ifq_len = 0;                                     \
 383 } while (0)
 384
 385 #define IF_DEQUEUE_ALL(ifq, m) do {                             \
 386         IF_LOCK(ifq);                                           \
 387         _IF_DEQUEUE_ALL(ifq, m);                                \
 388         IF_UNLOCK(ifq);                                         \
 389 } while (0)
 390
 391 #define _IF_POLL(ifq, m)        ((m) = (ifq)->ifq_head)
 392 #define IF_POLL(ifq, m)         _IF_POLL(ifq, m)
 393
 394 #define _IF_DRAIN(ifq) do {                                     \
 395         struct mbuf *m;                                         \
 396         for (;;) {                                              \
 397                 _IF_DEQUEUE(ifq, m);                            \
 398                 if (m == NULL)                                  \
 399                         break;                                  \
 400                 m_freem(m);                                     \
 401         }                                                       \
 402 } while (0)
 403
 404 #define IF_DRAIN(ifq) do {                                      \
 405         IF_LOCK(ifq);                                           \
 406         _IF_DRAIN(ifq);                                         \
 407         IF_UNLOCK(ifq);                                         \
 408 } while(0)
 409
 410 #ifdef _KERNEL
 411 /* interface link layer address change event */
 412 typedef void (*iflladdr_event_handler_t)(void *, struct ifnet *);
 413 EVENTHANDLER_DECLARE(iflladdr_event, iflladdr_event_handler_t);
 414 /* interface address change event */
 415 typedef void (*ifaddr_event_handler_t)(void *, struct ifnet *);
 416 EVENTHANDLER_DECLARE(ifaddr_event, ifaddr_event_handler_t);
 417 /* new interface arrival event */
 418 typedef void (*ifnet_arrival_event_handler_t)(void *, struct ifnet *);
 419 EVENTHANDLER_DECLARE(ifnet_arrival_event, ifnet_arrival_event_handler_t);
 420 /* interface departure event */
 421 typedef void (*ifnet_departure_event_handler_t)(void *, struct ifnet *);
 422 EVENTHANDLER_DECLARE(ifnet_departure_event, ifnet_departure_event_handler_t);
 423 /* Interface link state change event */
 424 typedef void (*ifnet_link_event_handler_t)(void *, struct ifnet *, int);
 425 EVENTHANDLER_DECLARE(ifnet_link_event, ifnet_link_event_handler_t);
 426
 427 /*
 428  * interface groups
 429  */
 430 struct ifg_group {
 431         char                             ifg_group[IFNAMSIZ];
 432         u_int                            ifg_refcnt;
 433         void                            *ifg_pf_kif;
 434         TAILQ_HEAD(, ifg_member)         ifg_members;
 435         TAILQ_ENTRY(ifg_group)           ifg_next;
 436 };
 437
 438 struct ifg_member {
 439         TAILQ_ENTRY(ifg_member)  ifgm_next;
 440         struct ifnet            *ifgm_ifp;
 441 };
 442
 443 struct ifg_list {
 444         struct ifg_group        *ifgl_group;
 445         TAILQ_ENTRY(ifg_list)    ifgl_next;
 446 };
 447
 448 /* group attach event */
 449 typedef void (*group_attach_event_handler_t)(void *, struct ifg_group *);
 450 EVENTHANDLER_DECLARE(group_attach_event, group_attach_event_handler_t);
 451 /* group detach event */
 452 typedef void (*group_detach_event_handler_t)(void *, struct ifg_group *);
 453 EVENTHANDLER_DECLARE(group_detach_event, group_detach_event_handler_t);
 454 /* group change event */
 455 typedef void (*group_change_event_handler_t)(void *, const char *);
 456 EVENTHANDLER_DECLARE(group_change_event, group_change_event_handler_t);
 457
 458 #define IF_AFDATA_LOCK_INIT(ifp)        \
 459         rw_init(&(ifp)->if_afdata_lock, "if_afdata")
 460
 461 #define IF_AFDATA_WLOCK(ifp)    rw_wlock(&(ifp)->if_afdata_lock)
 462 #define IF_AFDATA_RLOCK(ifp)    rw_rlock(&(ifp)->if_afdata_lock)
 463 #define IF_AFDATA_WUNLOCK(ifp)  rw_wunlock(&(ifp)->if_afdata_lock)
 464 #define IF_AFDATA_RUNLOCK(ifp)  rw_runlock(&(ifp)->if_afdata_lock)
 465 #define IF_AFDATA_LOCK(ifp)     IF_AFDATA_WLOCK(ifp)
 466 #define IF_AFDATA_UNLOCK(ifp)   IF_AFDATA_WUNLOCK(ifp)
 467 #define IF_AFDATA_TRYLOCK(ifp)  rw_try_wlock(&(ifp)->if_afdata_lock)
 468 #define IF_AFDATA_DESTROY(ifp)  rw_destroy(&(ifp)->if_afdata_lock)
 469
 470 #define IF_AFDATA_LOCK_ASSERT(ifp)      rw_assert(&(ifp)->if_afdata_lock, RA_LOCKED)
 471 #define IF_AFDATA_RLOCK_ASSERT(ifp)     rw_assert(&(ifp)->if_afdata_lock, RA_RLOCKED)
 472 #define IF_AFDATA_WLOCK_ASSERT(ifp)     rw_assert(&(ifp)->if_afdata_lock, RA_WLOCKED)
 473 #define IF_AFDATA_UNLOCK_ASSERT(ifp)    rw_assert(&(ifp)->if_afdata_lock, RA_UNLOCKED)
 474
 475 int     if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp,
 476             int adjust);
 477 #define IF_HANDOFF(ifq, m, ifp)                 \
 478         if_handoff((struct ifqueue *)ifq, m, ifp, 0)
 479 #define IF_HANDOFF_ADJ(ifq, m, ifp, adj)        \
 480         if_handoff((struct ifqueue *)ifq, m, ifp, adj)
 481
 482 void    if_start(struct ifnet *);
 483
 484 #define IFQ_ENQUEUE(ifq, m, err)                                        \
 485 do {                                                                    \
 486         IF_LOCK(ifq);                                                   \
 487         if (ALTQ_IS_ENABLED(ifq))                                       \
 488                 ALTQ_ENQUEUE(ifq, m, NULL, err);                        \
 489         else {                                                          \
 490                 if (_IF_QFULL(ifq)) {                                   \
 491                         m_freem(m);                                     \
 492                         (err) = ENOBUFS;                                \
 493                 } else {                                                \
 494                         _IF_ENQUEUE(ifq, m);                            \
 495                         (err) = 0;                                      \
 496                 }                                                       \
 497         }                                                               \
 498         if (err)                                                        \
 499                 (ifq)->ifq_drops++;                                     \
 500         IF_UNLOCK(ifq);                                                 \
 501 } while (0)
 502
 503 #define IFQ_DEQUEUE_NOLOCK(ifq, m)                                      \
 504 do {                                                                    \
 505         if (TBR_IS_ENABLED(ifq))                                        \
 506                 (m) = tbr_dequeue_ptr(ifq, ALTDQ_REMOVE);               \
 507         else if (ALTQ_IS_ENABLED(ifq))                                  \
 508                 ALTQ_DEQUEUE(ifq, m);                                   \
 509         else                                                            \
 510                 _IF_DEQUEUE(ifq, m);                                    \
 511 } while (0)
 512
 513 #define IFQ_DEQUEUE(ifq, m)                                             \
 514 do {                                                                    \
 515         IF_LOCK(ifq);                                                   \
 516         IFQ_DEQUEUE_NOLOCK(ifq, m);                                     \
 517         IF_UNLOCK(ifq);                                                 \
 518 } while (0)
 519
 520 #define IFQ_POLL_NOLOCK(ifq, m)                                         \
 521 do {                                                                    \
 522         if (TBR_IS_ENABLED(ifq))                                        \
 523                 (m) = tbr_dequeue_ptr(ifq, ALTDQ_POLL);                 \
 524         else if (ALTQ_IS_ENABLED(ifq))                                  \
 525                 ALTQ_POLL(ifq, m);                                      \
 526         else                                                            \
 527                 _IF_POLL(ifq, m);                                       \
 528 } while (0)
 529
 530 #define IFQ_POLL(ifq, m)                                                \
 531 do {                                                                    \
 532         IF_LOCK(ifq);                                                   \
 533         IFQ_POLL_NOLOCK(ifq, m);                                        \
 534         IF_UNLOCK(ifq);                                                 \
 535 } while (0)
 536
 537 #define IFQ_PURGE_NOLOCK(ifq)                                           \
 538 do {                                                                    \
 539         if (ALTQ_IS_ENABLED(ifq)) {                                     \
 540                 ALTQ_PURGE(ifq);                                        \
 541         } else                                                          \
 542                 _IF_DRAIN(ifq);                                         \
 543 } while (0)
 544
 545 #define IFQ_PURGE(ifq)                                                  \
 546 do {                                                                    \
 547         IF_LOCK(ifq);                                                   \
 548         IFQ_PURGE_NOLOCK(ifq);                                          \
 549         IF_UNLOCK(ifq);                                                 \
 550 } while (0)
 551
 552 #define IFQ_SET_READY(ifq)                                              \
 553         do { ((ifq)->altq_flags |= ALTQF_READY); } while (0)
 554
 555 #define IFQ_LOCK(ifq)                   IF_LOCK(ifq)
 556 #define IFQ_UNLOCK(ifq)                 IF_UNLOCK(ifq)
 557 #define IFQ_LOCK_ASSERT(ifq)            IF_LOCK_ASSERT(ifq)
 558 #define IFQ_IS_EMPTY(ifq)               ((ifq)->ifq_len == 0)
 559 #define IFQ_INC_LEN(ifq)                ((ifq)->ifq_len++)
 560 #define IFQ_DEC_LEN(ifq)                (--(ifq)->ifq_len)
 561 #define IFQ_INC_DROPS(ifq)              ((ifq)->ifq_drops++)
 562 #define IFQ_SET_MAXLEN(ifq, len)        ((ifq)->ifq_maxlen = (len))
 563
 564 /*
 565  * The IFF_DRV_OACTIVE test should really occur in the device driver, not in
 566  * the handoff logic, as that flag is locked by the device driver.
 567  */
 568 #define IFQ_HANDOFF_ADJ(ifp, m, adj, err)                               \
 569 do {                                                                    \
 570         int len;                                                        \
 571         short mflags;                                                   \
 572                                                                         \
 573         len = (m)->m_pkthdr.len;                                        \
 574         mflags = (m)->m_flags;                                          \
 575         IFQ_ENQUEUE(&(ifp)->if_snd, m, err);                            \
 576         if ((err) == 0) {                                               \
 577                 (ifp)->if_obytes += len + (adj);                        \
 578                 if (mflags & M_MCAST)                                   \
 579                         (ifp)->if_omcasts++;                            \
 580                 if (((ifp)->if_drv_flags & IFF_DRV_OACTIVE) == 0)       \
 581                         if_start(ifp);                                  \
 582         }                                                               \
 583 } while (0)
 584
 585 #define IFQ_HANDOFF(ifp, m, err)                                        \
 586         IFQ_HANDOFF_ADJ(ifp, m, 0, err)
 587
 588 #define IFQ_DRV_DEQUEUE(ifq, m)                                         \
 589 do {                                                                    \
 590         (m) = (ifq)->ifq_drv_head;                                      \
 591         if (m) {                                                        \
 592                 if (((ifq)->ifq_drv_head = (m)->m_nextpkt) == NULL)     \
 593                         (ifq)->ifq_drv_tail = NULL;                     \
 594                 (m)->m_nextpkt = NULL;                                  \
 595                 (ifq)->ifq_drv_len--;                                   \
 596         } else {                                                        \
 597                 IFQ_LOCK(ifq);                                          \
 598                 IFQ_DEQUEUE_NOLOCK(ifq, m);                             \
 599                 while ((ifq)->ifq_drv_len < (ifq)->ifq_drv_maxlen) {    \
 600                         struct mbuf *m0;                                \
 601                         IFQ_DEQUEUE_NOLOCK(ifq, m0);                    \
 602                         if (m0 == NULL)                                 \
 603                                 break;                                  \
 604                         m0->m_nextpkt = NULL;                           \
 605                         if ((ifq)->ifq_drv_tail == NULL)                \
 606                                 (ifq)->ifq_drv_head = m0;               \
 607                         else                                            \
 608                                 (ifq)->ifq_drv_tail->m_nextpkt = m0;    \
 609                         (ifq)->ifq_drv_tail = m0;                       \
 610                         (ifq)->ifq_drv_len++;                           \
 611                 }                                                       \
 612                 IFQ_UNLOCK(ifq);                                        \
 613         }                                                               \
 614 } while (0)
 615
 616 #define IFQ_DRV_PREPEND(ifq, m)                                         \
 617 do {                                                                    \
 618         (m)->m_nextpkt = (ifq)->ifq_drv_head;                           \
 619         if ((ifq)->ifq_drv_tail == NULL)                                \
 620                 (ifq)->ifq_drv_tail = (m);                              \
 621         (ifq)->ifq_drv_head = (m);                                      \
 622         (ifq)->ifq_drv_len++;                                           \
 623 } while (0)
 624
 625 #define IFQ_DRV_IS_EMPTY(ifq)                                           \
 626         (((ifq)->ifq_drv_len == 0) && ((ifq)->ifq_len == 0))
 627
 628 #define IFQ_DRV_PURGE(ifq)                                              \
 629 do {                                                                    \
 630         struct mbuf *m, *n = (ifq)->ifq_drv_head;                       \
 631         while((m = n) != NULL) {                                        \
 632                 n = m->m_nextpkt;                                       \
 633                 m_freem(m);                                             \
 634         }                                                               \
 635         (ifq)->ifq_drv_head = (ifq)->ifq_drv_tail = NULL;               \
 636         (ifq)->ifq_drv_len = 0;                                         \
 637         IFQ_PURGE(ifq);                                                 \
 638 } while (0)
 639
 640 #ifdef _KERNEL
 641 static __inline void
 642 if_initbaudrate(struct ifnet *ifp, uintmax_t baud)
 643 {
 644
 645         ifp->if_baudrate_pf = 0;
 646         while (baud > (u_long)(~0UL)) {
 647                 baud /= 10;
 648                 ifp->if_baudrate_pf++;
 649         }
 650         ifp->if_baudrate = baud;
 651 }
 652
 653 static __inline int
 654 drbr_enqueue(struct ifnet *ifp, struct buf_ring *br, struct mbuf *m)
 655 {
 656         int error = 0;
 657
 658 #ifdef ALTQ
 659         if (ALTQ_IS_ENABLED(&ifp->if_snd)) {
 660                 IFQ_ENQUEUE(&ifp->if_snd, m, error);
 661                 return (error);
 662         }
 663 #endif
 664         error = buf_ring_enqueue(br, m);
 665         if (error)
 666                 m_freem(m);
 667
 668         return (error);
 669 }
 670
 671 static __inline void
 672 drbr_putback(struct ifnet *ifp, struct buf_ring *br, struct mbuf *new)
 673 {
 674         /*
 675          * The top of the list needs to be swapped
 676          * for this one.
 677          */
 678 #ifdef ALTQ
 679         if (ifp != NULL && ALTQ_IS_ENABLED(&ifp->if_snd)) {
 680                 /*
 681                  * Peek in altq case dequeued it
 682                  * so put it back.
 683                  */
 684                 IFQ_DRV_PREPEND(&ifp->if_snd, new);
 685                 return;
 686         }
 687 #endif
 688         buf_ring_putback_sc(br, new);
 689 }
 690
 691 static __inline struct mbuf *
 692 drbr_peek(struct ifnet *ifp, struct buf_ring *br)
 693 {
 694 #ifdef ALTQ
 695         struct mbuf *m;
 696         if (ifp != NULL && ALTQ_IS_ENABLED(&ifp->if_snd)) {
 697                 /*
 698                  * Pull it off like a dequeue
 699                  * since drbr_advance() does nothing
 700                  * for altq and drbr_putback() will
 701                  * use the old prepend function.
 702                  */
 703                 IFQ_DEQUEUE(&ifp->if_snd, m);
 704                 return (m);
 705         }
 706 #endif
 707         return(buf_ring_peek(br));
 708 }
 709
 710 static __inline void
 711 drbr_flush(struct ifnet *ifp, struct buf_ring *br)
 712 {
 713         struct mbuf *m;
 714
 715 #ifdef ALTQ
 716         if (ifp != NULL && ALTQ_IS_ENABLED(&ifp->if_snd))
 717                 IFQ_PURGE(&ifp->if_snd);
 718 #endif
 719         while ((m = buf_ring_dequeue_sc(br)) != NULL)
 720                 m_freem(m);
 721 }
 722
 723 static __inline void
 724 drbr_free(struct buf_ring *br, struct malloc_type *type)
 725 {
 726
 727         drbr_flush(NULL, br);
 728         buf_ring_free(br, type);
 729 }
 730
 731 static __inline struct mbuf *
 732 drbr_dequeue(struct ifnet *ifp, struct buf_ring *br)
 733 {
 734 #ifdef ALTQ
 735         struct mbuf *m;
 736
 737         if (ifp != NULL && ALTQ_IS_ENABLED(&ifp->if_snd)) {
 738                 IFQ_DEQUEUE(&ifp->if_snd, m);
 739                 return (m);
 740         }
 741 #endif
 742         return (buf_ring_dequeue_sc(br));
 743 }
 744
 745 static __inline void
 746 drbr_advance(struct ifnet *ifp, struct buf_ring *br)
 747 {
 748 #ifdef ALTQ
 749         /* Nothing to do here since peek dequeues in altq case */
 750         if (ifp != NULL && ALTQ_IS_ENABLED(&ifp->if_snd))
 751                 return;
 752 #endif
 753         return (buf_ring_advance_sc(br));
 754 }
 755
 756
 757 static __inline struct mbuf *
 758 drbr_dequeue_cond(struct ifnet *ifp, struct buf_ring *br,
 759     int (*func) (struct mbuf *, void *), void *arg)
 760 {
 761         struct mbuf *m;
 762 #ifdef ALTQ
 763         if (ALTQ_IS_ENABLED(&ifp->if_snd)) {
 764                 IFQ_LOCK(&ifp->if_snd);
 765                 IFQ_POLL_NOLOCK(&ifp->if_snd, m);
 766                 if (m != NULL && func(m, arg) == 0) {
 767                         IFQ_UNLOCK(&ifp->if_snd);
 768                         return (NULL);
 769                 }
 770                 IFQ_DEQUEUE_NOLOCK(&ifp->if_snd, m);
 771                 IFQ_UNLOCK(&ifp->if_snd);
 772                 return (m);
 773         }
 774 #endif
 775         m = buf_ring_peek(br);
 776         if (m == NULL || func(m, arg) == 0)
 777                 return (NULL);
 778
 779         return (buf_ring_dequeue_sc(br));
 780 }
 781
 782 static __inline int
 783 drbr_empty(struct ifnet *ifp, struct buf_ring *br)
 784 {
 785 #ifdef ALTQ
 786         if (ALTQ_IS_ENABLED(&ifp->if_snd))
 787                 return (IFQ_IS_EMPTY(&ifp->if_snd));
 788 #endif
 789         return (buf_ring_empty(br));
 790 }
 791
 792 static __inline int
 793 drbr_needs_enqueue(struct ifnet *ifp, struct buf_ring *br)
 794 {
 795 #ifdef ALTQ
 796         if (ALTQ_IS_ENABLED(&ifp->if_snd))
 797                 return (1);
 798 #endif
 799         return (!buf_ring_empty(br));
 800 }
 801
 802 static __inline int
 803 drbr_inuse(struct ifnet *ifp, struct buf_ring *br)
 804 {
 805 #ifdef ALTQ
 806         if (ALTQ_IS_ENABLED(&ifp->if_snd))
 807                 return (ifp->if_snd.ifq_len);
 808 #endif
 809         return (buf_ring_count(br));
 810 }
 811 #endif
 812 /*
 813  * 72 was chosen below because it is the size of a TCP/IP
 814  * header (40) + the minimum mss (32).
 815  */
 816 #define IF_MINMTU       72
 817 #define IF_MAXMTU       65535
 818
 819 #define TOEDEV(ifp)     ((ifp)->if_llsoftc)
 820
 821 #endif /* _KERNEL */
 822
 823 /*
 824  * The ifaddr structure contains information about one address
 825  * of an interface.  They are maintained by the different address families,
 826  * are allocated and attached when an address is set, and are linked
 827  * together so all addresses for an interface can be located.
 828  *
 829  * NOTE: a 'struct ifaddr' is always at the beginning of a larger
 830  * chunk of malloc'ed memory, where we store the three addresses
 831  * (ifa_addr, ifa_dstaddr and ifa_netmask) referenced here.
 832  */
 833 struct ifaddr {
 834         struct  sockaddr *ifa_addr;     /* address of interface */
 835         struct  sockaddr *ifa_dstaddr;  /* other end of p-to-p link */
 836 #define ifa_broadaddr   ifa_dstaddr     /* broadcast address interface */
 837         struct  sockaddr *ifa_netmask;  /* used to determine subnet */
 838         struct  if_data if_data;        /* not all members are meaningful */
 839         struct  ifnet *ifa_ifp;         /* back-pointer to interface */
 840         struct  carp_softc *ifa_carp;   /* pointer to CARP data */
 841         TAILQ_ENTRY(ifaddr) ifa_link;   /* queue macro glue */
 842         void    (*ifa_rtrequest)        /* check or clean routes (+ or -)'d */
 843                 (int, struct rtentry *, struct rt_addrinfo *);
 844         u_short ifa_flags;              /* mostly rt_flags for cloning */
 845         u_int   ifa_refcnt;             /* references to this structure */
 846         int     ifa_metric;             /* cost of going out this interface */
 847         int (*ifa_claim_addr)           /* check if an addr goes to this if */
 848                 (struct ifaddr *, struct sockaddr *);
 849         struct mtx ifa_mtx;
 850 };
 851 #define IFA_ROUTE       RTF_UP          /* route installed */
 852 #define IFA_RTSELF      RTF_HOST        /* loopback route to self installed */
 853
 854 /* for compatibility with other BSDs */
 855 #define ifa_list        ifa_link
 856
 857 #ifdef _KERNEL
 858 #define IFA_LOCK(ifa)           mtx_lock(&(ifa)->ifa_mtx)
 859 #define IFA_UNLOCK(ifa)         mtx_unlock(&(ifa)->ifa_mtx)
 860
 861 void    ifa_free(struct ifaddr *ifa);
 862 void    ifa_init(struct ifaddr *ifa);
 863 void    ifa_ref(struct ifaddr *ifa);
 864 #endif
 865
 866 /*
 867  * Multicast address structure.  This is analogous to the ifaddr
 868  * structure except that it keeps track of multicast addresses.
 869  */
 870 struct ifmultiaddr {
 871         TAILQ_ENTRY(ifmultiaddr) ifma_link; /* queue macro glue */
 872         struct  sockaddr *ifma_addr;    /* address this membership is for */
 873         struct  sockaddr *ifma_lladdr;  /* link-layer translation, if any */
 874         struct  ifnet *ifma_ifp;        /* back-pointer to interface */
 875         u_int   ifma_refcount;          /* reference count */
 876         void    *ifma_protospec;        /* protocol-specific state, if any */
 877         struct  ifmultiaddr *ifma_llifma; /* pointer to ifma for ifma_lladdr */
 878 };
 879
 880 #ifdef _KERNEL
 881
 882 extern  struct rwlock ifnet_rwlock;
 883 extern  struct sx ifnet_sxlock;
 884
 885 #define IFNET_LOCK_INIT() do {                                          \
 886         rw_init_flags(&ifnet_rwlock, "ifnet_rw",  RW_RECURSE);          \
 887         sx_init_flags(&ifnet_sxlock, "ifnet_sx",  SX_RECURSE);          \
 888 } while(0)
 889
 890 #define IFNET_WLOCK() do {                                              \
 891         sx_xlock(&ifnet_sxlock);                                        \
 892         rw_wlock(&ifnet_rwlock);                                        \
 893 } while (0)
 894
 895 #define IFNET_WUNLOCK() do {                                            \
 896         rw_wunlock(&ifnet_rwlock);                                      \
 897         sx_xunlock(&ifnet_sxlock);                                      \
 898 } while (0)
 899
 900 /*
 901  * To assert the ifnet lock, you must know not only whether it's for read or
 902  * write, but also whether it was acquired with sleep support or not.
 903  */
 904 #define IFNET_RLOCK_ASSERT()            sx_assert(&ifnet_sxlock, SA_SLOCKED)
 905 #define IFNET_RLOCK_NOSLEEP_ASSERT()    rw_assert(&ifnet_rwlock, RA_RLOCKED)
 906 #define IFNET_WLOCK_ASSERT() do {                                       \
 907         sx_assert(&ifnet_sxlock, SA_XLOCKED);                           \
 908         rw_assert(&ifnet_rwlock, RA_WLOCKED);                           \
 909 } while (0)
 910
 911 #define IFNET_RLOCK()           sx_slock(&ifnet_sxlock)
 912 #define IFNET_RLOCK_NOSLEEP()   rw_rlock(&ifnet_rwlock)
 913 #define IFNET_RUNLOCK()         sx_sunlock(&ifnet_sxlock)
 914 #define IFNET_RUNLOCK_NOSLEEP() rw_runlock(&ifnet_rwlock)
 915
 916 /*
 917  * Look up an ifnet given its index; the _ref variant also acquires a
 918  * reference that must be freed using if_rele().  It is almost always a bug
 919  * to call ifnet_byindex() instead if ifnet_byindex_ref().
 920  */
 921 struct ifnet    *ifnet_byindex(u_short idx);
 922 struct ifnet    *ifnet_byindex_locked(u_short idx);
 923 struct ifnet    *ifnet_byindex_ref(u_short idx);
 924
 925 /*
 926  * Given the index, ifaddr_byindex() returns the one and only
 927  * link-level ifaddr for the interface. You are not supposed to use
 928  * it to traverse the list of addresses associated to the interface.
 929  */
 930 struct ifaddr   *ifaddr_byindex(u_short idx);
 931
 932 VNET_DECLARE(struct ifnethead, ifnet);
 933 VNET_DECLARE(struct ifgrouphead, ifg_head);
 934 VNET_DECLARE(int, if_index);
 935 VNET_DECLARE(struct ifnet *, loif);     /* first loopback interface */
 936 VNET_DECLARE(int, useloopback);
 937
 938 #define V_ifnet         VNET(ifnet)
 939 #define V_ifg_head      VNET(ifg_head)
 940 #define V_if_index      VNET(if_index)
 941 #define V_loif          VNET(loif)
 942 #define V_useloopback   VNET(useloopback)
 943
 944 extern  int ifqmaxlen;
 945
 946 int     if_addgroup(struct ifnet *, const char *);
 947 int     if_delgroup(struct ifnet *, const char *);
 948 int     if_addmulti(struct ifnet *, struct sockaddr *, struct ifmultiaddr **);
 949 int     if_allmulti(struct ifnet *, int);
 950 struct  ifnet* if_alloc(u_char);
 951 void    if_attach(struct ifnet *);
 952 void    if_dead(struct ifnet *);
 953 int     if_delmulti(struct ifnet *, struct sockaddr *);
 954 void    if_delmulti_ifma(struct ifmultiaddr *);
 955 void    if_detach(struct ifnet *);
 956 void    if_vmove(struct ifnet *, struct vnet *);
 957 void    if_purgeaddrs(struct ifnet *);
 958 void    if_delallmulti(struct ifnet *);
 959 void    if_down(struct ifnet *);
 960 struct ifmultiaddr *
 961         if_findmulti(struct ifnet *, struct sockaddr *);
 962 void    if_free(struct ifnet *);
 963 void    if_initname(struct ifnet *, const char *, int);
 964 void    if_link_state_change(struct ifnet *, int);
 965 int     if_printf(struct ifnet *, const char *, ...) __printflike(2, 3);
 966 void    if_qflush(struct ifnet *);
 967 void    if_ref(struct ifnet *);
 968 void    if_rele(struct ifnet *);
 969 int     if_setlladdr(struct ifnet *, const u_char *, int);
 970 void    if_up(struct ifnet *);
 971 int     ifioctl(struct socket *, u_long, caddr_t, struct thread *);
 972 int     ifpromisc(struct ifnet *, int);
 973 struct  ifnet *ifunit(const char *);
 974 struct  ifnet *ifunit_ref(const char *);
 975
 976 void    ifq_init(struct ifaltq *, struct ifnet *ifp);
 977 void    ifq_delete(struct ifaltq *);
 978
 979 int     ifa_add_loopback_route(struct ifaddr *, struct sockaddr *);
 980 int     ifa_del_loopback_route(struct ifaddr *, struct sockaddr *);
 981
 982 struct  ifaddr *ifa_ifwithaddr(struct sockaddr *);
 983 int             ifa_ifwithaddr_check(struct sockaddr *);
 984 struct  ifaddr *ifa_ifwithbroadaddr(struct sockaddr *);
 985 struct  ifaddr *ifa_ifwithdstaddr(struct sockaddr *);
 986 struct  ifaddr *ifa_ifwithdstaddr_fib(struct sockaddr *, int);
 987 struct  ifaddr *ifa_ifwithnet(struct sockaddr *, int);
 988 struct  ifaddr *ifa_ifwithnet_fib(struct sockaddr *, int, int);
 989 struct  ifaddr *ifa_ifwithroute(int, struct sockaddr *, struct sockaddr *);
 990 struct  ifaddr *ifa_ifwithroute_fib(int, struct sockaddr *, struct sockaddr *, u_int);
 991 struct  ifaddr *ifaof_ifpforaddr(struct sockaddr *, struct ifnet *);
 992 int     ifa_preferred(struct ifaddr *, struct ifaddr *);
 993
 994 int     if_simloop(struct ifnet *ifp, struct mbuf *m, int af, int hlen);
 995
 996 typedef void *if_com_alloc_t(u_char type, struct ifnet *ifp);
 997 typedef void if_com_free_t(void *com, u_char type);
 998 void    if_register_com_alloc(u_char type, if_com_alloc_t *a, if_com_free_t *f);
 999 void    if_deregister_com_alloc(u_char type);
1000 uint64_t if_get_counter_default(struct ifnet *, ift_counter);
1001 void    if_inc_counter(struct ifnet *, ift_counter, int64_t);
1002
1003 #define IF_LLADDR(ifp)                                                  \
1004     LLADDR((struct sockaddr_dl *)((ifp)->if_addr->ifa_addr))
1005
1006 #ifdef DEVICE_POLLING
1007 enum poll_cmd { POLL_ONLY, POLL_AND_CHECK_STATUS };
1008
1009 typedef int poll_handler_t(struct ifnet *ifp, enum poll_cmd cmd, int count);
1010 int    ether_poll_register(poll_handler_t *h, struct ifnet *ifp);
1011 int    ether_poll_deregister(struct ifnet *ifp);
1012 #endif /* DEVICE_POLLING */
1013
1014 /* TSO */
1015 void if_hw_tsomax_common(struct ifnet *, struct ifnet_hw_tsomax *);
1016 int if_hw_tsomax_update(struct ifnet *, struct ifnet_hw_tsomax *);
1017
1018 #endif /* _KERNEL */
1019
1020 #endif /* !_NET_IF_VAR_H_ */