FreeBSD/Linux Kernel Cross Reference
sys/net/if_private.h

     /*-
      * SPDX-License-Identifier: BSD-3-Clause
      *
      * Copyright (c) 1982, 1986, 1989, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      From: @(#)if.h  8.1 (Berkeley) 6/10/93
     */
    
    #ifndef _NET_IF_PRIVATE_H_
    #define _NET_IF_PRIVATE_H_
    
    #ifdef  _KERNEL
    /*
     * Structure defining a network interface.
     */
    struct ifnet {
            /* General book keeping of interface lists. */
            CK_STAILQ_ENTRY(ifnet) if_link;         /* all struct ifnets are chained (CK_) */
            LIST_ENTRY(ifnet) if_clones;    /* interfaces of a cloner */
            CK_STAILQ_HEAD(, ifg_list) if_groups; /* linked list of groups per if (CK_) */
                                            /* protected by if_addr_lock */
            u_char  if_alloctype;           /* if_type at time of allocation */
            uint8_t if_numa_domain;         /* NUMA domain of device */
            /* Driver and protocol specific information that remains stable. */
            void    *if_softc;              /* pointer to driver state */
            void    *if_llsoftc;            /* link layer softc */
            void    *if_l2com;              /* pointer to protocol bits */
            const char *if_dname;           /* driver name */
            int     if_dunit;               /* unit or IF_DUNIT_NONE */
            u_short if_index;               /* numeric abbreviation for this if  */
            u_short if_idxgen;              /* ... and its generation count */
            char    if_xname[IFNAMSIZ];     /* external name (name + unit) */
            char    *if_description;        /* interface description */
    
            /* Variable fields that are touched by the stack and drivers. */
            int     if_flags;               /* up/down, broadcast, etc. */
            int     if_drv_flags;           /* driver-managed status flags */
            int     if_capabilities;        /* interface features & capabilities */
            int     if_capabilities2;       /* part 2 */
            int     if_capenable;           /* enabled features & capabilities */
            int     if_capenable2;          /* part 2 */
            void    *if_linkmib;            /* link-type-specific MIB data */
            size_t  if_linkmiblen;          /* length of above data */
            u_int   if_refcount;            /* reference count */
    
            /* These fields are shared with struct if_data. */
            uint8_t         if_type;        /* ethernet, tokenring, etc */
            uint8_t         if_addrlen;     /* media address length */
            uint8_t         if_hdrlen;      /* media header length */
            uint8_t         if_link_state;  /* current link state */
            uint32_t        if_mtu;         /* maximum transmission unit */
            uint32_t        if_metric;      /* routing metric (external only) */
            uint64_t        if_baudrate;    /* linespeed */
            uint64_t        if_hwassist;    /* HW offload capabilities, see IFCAP */
            time_t          if_epoch;       /* uptime at attach or stat reset */
            struct timeval  if_lastchange;  /* time of last administrative change */
    
            struct  ifaltq if_snd;          /* output queue (includes altq) */
            struct  task if_linktask;       /* task for link change events */
            struct  task if_addmultitask;   /* task for SIOCADDMULTI */
    
            /* Addresses of different protocol families assigned to this if. */
            struct mtx if_addr_lock;        /* lock to protect address lists */
                    /*
                     * if_addrhead is the list of all addresses associated to
                     * an interface.
                     * Some code in the kernel assumes that first element
                     * of the list has type AF_LINK, and contains sockaddr_dl
                     * addresses which store the link-level address and the name
                     * of the interface.
                     * However, access to the AF_LINK address through this
                     * field is deprecated. Use if_addr instead.
                     */
            struct  ifaddrhead if_addrhead; /* linked list of addresses per if */
           struct  ifmultihead if_multiaddrs; /* multicast addresses configured */
           int     if_amcount;             /* number of all-multicast requests */
           struct  ifaddr  *if_addr;       /* pointer to link-level address */
           void    *if_hw_addr;            /* hardware link-level address */
           const u_int8_t *if_broadcastaddr; /* linklevel broadcast bytestring */
           struct  mtx if_afdata_lock;
           void    *if_afdata[AF_MAX];
           int     if_afdata_initialized;
   
           /* Additional features hung off the interface. */
           u_int   if_fib;                 /* interface FIB */
           struct  vnet *if_vnet;          /* pointer to network stack instance */
           struct  vnet *if_home_vnet;     /* where this ifnet originates from */
           struct  ifvlantrunk *if_vlantrunk; /* pointer to 802.1q data */
           struct  bpf_if *if_bpf;         /* packet filter structure */
           int     if_pcount;              /* number of promiscuous listeners */
           void    *if_bridge;             /* bridge glue */
           void    *if_lagg;               /* lagg glue */
           void    *if_pf_kif;             /* pf glue */
           struct  carp_if *if_carp;       /* carp interface structure */
           struct  label *if_label;        /* interface MAC label */
           struct  netmap_adapter *if_netmap; /* netmap(4) softc */
   
           /* Various procedures of the layer2 encapsulation and drivers. */
           if_output_fn_t if_output;       /* output routine (enqueue) */
           if_input_fn_t if_input;         /* input routine (from h/w driver) */
           struct mbuf *(*if_bridge_input)(struct ifnet *, struct mbuf *);
           int     (*if_bridge_output)(struct ifnet *, struct mbuf *, struct sockaddr *,
                       struct rtentry *);
           void (*if_bridge_linkstate)(struct ifnet *ifp);
           if_start_fn_t   if_start;       /* initiate output routine */
           if_ioctl_fn_t   if_ioctl;       /* ioctl routine */
           if_init_fn_t    if_init;        /* Init routine */
           int     (*if_resolvemulti)      /* validate/resolve multicast */
                   (struct ifnet *, struct sockaddr **, struct sockaddr *);
           if_qflush_fn_t  if_qflush;      /* flush any queue */
           if_transmit_fn_t if_transmit;   /* initiate output routine */
   
           void    (*if_reassign)          /* reassign to vnet routine */
                   (struct ifnet *, struct vnet *, char *);
           if_get_counter_t if_get_counter; /* get counter values */
           int     (*if_requestencap)      /* make link header from request */
                   (struct ifnet *, struct if_encap_req *);
   
           /* Statistics. */
           counter_u64_t   if_counters[IFCOUNTERS];
   
           /* Stuff that's only temporary and doesn't belong here. */
   
           /*
            * Network adapter TSO limits:
            * ===========================
            *
            * If the "if_hw_tsomax" field is zero the maximum segment
            * length limit does not apply. If the "if_hw_tsomaxsegcount"
            * or the "if_hw_tsomaxsegsize" field is zero the TSO segment
            * count limit does not apply. If all three fields are zero,
            * there is no TSO limit.
            *
            * NOTE: The TSO limits should reflect the values used in the
            * BUSDMA tag a network adapter is using to load a mbuf chain
            * for transmission. The TCP/IP network stack will subtract
            * space for all linklevel and protocol level headers and
            * ensure that the full mbuf chain passed to the network
            * adapter fits within the given limits.
            */
           u_int   if_hw_tsomax;           /* TSO maximum size in bytes */
           u_int   if_hw_tsomaxsegcount;   /* TSO maximum segment count */
           u_int   if_hw_tsomaxsegsize;    /* TSO maximum segment size in bytes */
   
           /*
            * Network adapter send tag support:
            */
           if_snd_tag_alloc_t *if_snd_tag_alloc;
   
           /* Ratelimit (packet pacing) */
           if_ratelimit_query_t *if_ratelimit_query;
           if_ratelimit_setup_t *if_ratelimit_setup;
   
           /* Ethernet PCP */
           uint8_t if_pcp;
   
           /*
            * Debugnet (Netdump) hooks to be called while in db/panic.
            */
           struct debugnet_methods *if_debugnet_methods;
           struct epoch_context    if_epoch_ctx;
   
           /*
            * Spare fields to be added before branching a stable branch, so
            * that structure can be enhanced without changing the kernel
            * binary interface.
            */
           int     if_ispare[4];           /* general use */
   };
   
   #endif  /* _KERNEL */
   
   #endif  /* _NET_IF_PRIVATE_H_ */

Cache object: 8a44652e0fa3c93d21b895dd31b31cd4