9d3bb599b1
and ifnet functions - add memory barriers to <machine/atomic.h> - update drivers to only conditionally define their own - add lockless producer / consumer ring buffer - remove ring buffer implementation from cxgb and update its callers - add if_transmit(struct ifnet *ifp, struct mbuf *m) to ifnet to allow drivers to efficiently manage multiple hardware queues (i.e. not serialize all packets through one ifq) - expose if_qflush to allow drivers to flush any driver managed queues This work was supported by Bitgravity Inc. and Chelsio Inc.
728 lines
24 KiB
C
728 lines
24 KiB
C
/*-
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* Copyright (c) 1982, 1986, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* From: @(#)if.h 8.1 (Berkeley) 6/10/93
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* $FreeBSD$
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*/
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#ifndef _NET_IF_VAR_H_
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#define _NET_IF_VAR_H_
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/*
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* Structures defining a network interface, providing a packet
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* transport mechanism (ala level 0 of the PUP protocols).
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*
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* Each interface accepts output datagrams of a specified maximum
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* length, and provides higher level routines with input datagrams
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* received from its medium.
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*
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* Output occurs when the routine if_output is called, with three parameters:
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* (*ifp->if_output)(ifp, m, dst, rt)
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* Here m is the mbuf chain to be sent and dst is the destination address.
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* The output routine encapsulates the supplied datagram if necessary,
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* and then transmits it on its medium.
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*
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* On input, each interface unwraps the data received by it, and either
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* places it on the input queue of an internetwork datagram routine
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* and posts the associated software interrupt, or passes the datagram to a raw
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* packet input routine.
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*
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* Routines exist for locating interfaces by their addresses
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* or for locating an interface on a certain network, as well as more general
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* routing and gateway routines maintaining information used to locate
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* interfaces. These routines live in the files if.c and route.c
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*/
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#ifdef __STDC__
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/*
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* Forward structure declarations for function prototypes [sic].
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*/
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struct mbuf;
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struct thread;
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struct rtentry;
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struct rt_addrinfo;
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struct socket;
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struct ether_header;
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struct carp_if;
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struct ifvlantrunk;
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#endif
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#include <sys/queue.h> /* get TAILQ macros */
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#ifdef _KERNEL
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#include <sys/mbuf.h>
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#include <sys/eventhandler.h>
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#endif /* _KERNEL */
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#include <sys/lock.h> /* XXX */
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#include <sys/mutex.h> /* XXX */
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#include <sys/event.h> /* XXX */
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#include <sys/_task.h>
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#define IF_DUNIT_NONE -1
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#include <altq/if_altq.h>
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TAILQ_HEAD(ifnethead, ifnet); /* we use TAILQs so that the order of */
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TAILQ_HEAD(ifaddrhead, ifaddr); /* instantiation is preserved in the list */
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TAILQ_HEAD(ifprefixhead, ifprefix);
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TAILQ_HEAD(ifmultihead, ifmultiaddr);
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TAILQ_HEAD(ifgrouphead, ifg_group);
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/*
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* Structure defining a queue for a network interface.
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*/
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struct ifqueue {
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struct mbuf *ifq_head;
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struct mbuf *ifq_tail;
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int ifq_len;
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int ifq_maxlen;
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int ifq_drops;
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struct mtx ifq_mtx;
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};
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/*
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* Structure defining a network interface.
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*
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* (Would like to call this struct ``if'', but C isn't PL/1.)
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*/
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struct ifnet {
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void *if_softc; /* pointer to driver state */
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void *if_l2com; /* pointer to protocol bits */
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TAILQ_ENTRY(ifnet) if_link; /* all struct ifnets are chained */
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char if_xname[IFNAMSIZ]; /* external name (name + unit) */
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const char *if_dname; /* driver name */
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int if_dunit; /* unit or IF_DUNIT_NONE */
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struct ifaddrhead if_addrhead; /* linked list of addresses per if */
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/*
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* if_addrhead is the list of all addresses associated to
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* an interface.
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* Some code in the kernel assumes that first element
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* of the list has type AF_LINK, and contains sockaddr_dl
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* addresses which store the link-level address and the name
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* of the interface.
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* However, access to the AF_LINK address through this
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* field is deprecated. Use if_addr or ifaddr_byindex() instead.
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*/
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struct knlist if_klist; /* events attached to this if */
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int if_pcount; /* number of promiscuous listeners */
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struct carp_if *if_carp; /* carp interface structure */
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struct bpf_if *if_bpf; /* packet filter structure */
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u_short if_index; /* numeric abbreviation for this if */
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short if_timer; /* time 'til if_watchdog called */
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struct ifvlantrunk *if_vlantrunk; /* pointer to 802.1q data */
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int if_flags; /* up/down, broadcast, etc. */
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int if_capabilities; /* interface features & capabilities */
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int if_capenable; /* enabled features & capabilities */
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void *if_linkmib; /* link-type-specific MIB data */
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size_t if_linkmiblen; /* length of above data */
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struct if_data if_data;
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struct ifmultihead if_multiaddrs; /* multicast addresses configured */
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int if_amcount; /* number of all-multicast requests */
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/* procedure handles */
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int (*if_output) /* output routine (enqueue) */
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(struct ifnet *, struct mbuf *, struct sockaddr *,
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struct rtentry *);
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void (*if_input) /* input routine (from h/w driver) */
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(struct ifnet *, struct mbuf *);
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void (*if_start) /* initiate output routine */
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(struct ifnet *);
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int (*if_ioctl) /* ioctl routine */
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(struct ifnet *, u_long, caddr_t);
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void (*if_watchdog) /* timer routine */
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(struct ifnet *);
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void (*if_init) /* Init routine */
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(void *);
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int (*if_resolvemulti) /* validate/resolve multicast */
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(struct ifnet *, struct sockaddr **, struct sockaddr *);
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struct ifaddr *if_addr; /* pointer to link-level address */
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void *if_llsoftc; /* link layer softc */
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int if_drv_flags; /* driver-managed status flags */
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u_int if_spare_flags2; /* spare flags 2 */
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struct ifaltq if_snd; /* output queue (includes altq) */
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const u_int8_t *if_broadcastaddr; /* linklevel broadcast bytestring */
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void *if_bridge; /* bridge glue */
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struct lltable *lltables; /* list of L3-L2 resolution tables */
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struct label *if_label; /* interface MAC label */
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/* these are only used by IPv6 */
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struct ifprefixhead if_prefixhead; /* list of prefixes per if */
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void *if_afdata[AF_MAX];
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int if_afdata_initialized;
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struct mtx if_afdata_mtx;
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struct task if_starttask; /* task for IFF_NEEDSGIANT */
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struct task if_linktask; /* task for link change events */
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struct mtx if_addr_mtx; /* mutex to protect address lists */
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LIST_ENTRY(ifnet) if_clones; /* interfaces of a cloner */
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TAILQ_HEAD(, ifg_list) if_groups; /* linked list of groups per if */
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/* protected by if_addr_mtx */
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void *if_pf_kif;
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void *if_lagg; /* lagg glue */
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void *if_pspare[8]; /* multiq/TOE 3; vimage 3; general use 4 */
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void (*if_qflush) /* flush any queues */
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(struct ifnet *);
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int (*if_transmit) /* initiate output routine */
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(struct ifnet *, struct mbuf *);
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int if_ispare[2]; /* general use 2 */
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};
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typedef void if_init_f_t(void *);
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/*
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* XXX These aliases are terribly dangerous because they could apply
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* to anything.
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*/
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#define if_mtu if_data.ifi_mtu
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#define if_type if_data.ifi_type
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#define if_physical if_data.ifi_physical
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#define if_addrlen if_data.ifi_addrlen
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#define if_hdrlen if_data.ifi_hdrlen
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#define if_metric if_data.ifi_metric
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#define if_link_state if_data.ifi_link_state
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#define if_baudrate if_data.ifi_baudrate
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#define if_hwassist if_data.ifi_hwassist
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#define if_ipackets if_data.ifi_ipackets
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#define if_ierrors if_data.ifi_ierrors
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#define if_opackets if_data.ifi_opackets
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#define if_oerrors if_data.ifi_oerrors
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#define if_collisions if_data.ifi_collisions
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#define if_ibytes if_data.ifi_ibytes
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#define if_obytes if_data.ifi_obytes
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#define if_imcasts if_data.ifi_imcasts
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#define if_omcasts if_data.ifi_omcasts
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#define if_iqdrops if_data.ifi_iqdrops
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#define if_noproto if_data.ifi_noproto
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#define if_lastchange if_data.ifi_lastchange
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#define if_rawoutput(if, m, sa) if_output(if, m, sa, (struct rtentry *)NULL)
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/* for compatibility with other BSDs */
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#define if_addrlist if_addrhead
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#define if_list if_link
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#define if_name(ifp) ((ifp)->if_xname)
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/*
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* Locks for address lists on the network interface.
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*/
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#define IF_ADDR_LOCK_INIT(if) mtx_init(&(if)->if_addr_mtx, \
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"if_addr_mtx", NULL, MTX_DEF)
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#define IF_ADDR_LOCK_DESTROY(if) mtx_destroy(&(if)->if_addr_mtx)
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#define IF_ADDR_LOCK(if) mtx_lock(&(if)->if_addr_mtx)
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#define IF_ADDR_UNLOCK(if) mtx_unlock(&(if)->if_addr_mtx)
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#define IF_ADDR_LOCK_ASSERT(if) mtx_assert(&(if)->if_addr_mtx, MA_OWNED)
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/*
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* Output queues (ifp->if_snd) and slow device input queues (*ifp->if_slowq)
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* are queues of messages stored on ifqueue structures
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* (defined above). Entries are added to and deleted from these structures
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* by these macros, which should be called with ipl raised to splimp().
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*/
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#define IF_LOCK(ifq) mtx_lock(&(ifq)->ifq_mtx)
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#define IF_UNLOCK(ifq) mtx_unlock(&(ifq)->ifq_mtx)
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#define IF_LOCK_ASSERT(ifq) mtx_assert(&(ifq)->ifq_mtx, MA_OWNED)
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#define _IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen)
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#define _IF_DROP(ifq) ((ifq)->ifq_drops++)
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#define _IF_QLEN(ifq) ((ifq)->ifq_len)
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#define _IF_ENQUEUE(ifq, m) do { \
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(m)->m_nextpkt = NULL; \
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if ((ifq)->ifq_tail == NULL) \
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(ifq)->ifq_head = m; \
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else \
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(ifq)->ifq_tail->m_nextpkt = m; \
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(ifq)->ifq_tail = m; \
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(ifq)->ifq_len++; \
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} while (0)
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#define IF_ENQUEUE(ifq, m) do { \
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IF_LOCK(ifq); \
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_IF_ENQUEUE(ifq, m); \
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IF_UNLOCK(ifq); \
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} while (0)
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#define _IF_PREPEND(ifq, m) do { \
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(m)->m_nextpkt = (ifq)->ifq_head; \
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if ((ifq)->ifq_tail == NULL) \
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(ifq)->ifq_tail = (m); \
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(ifq)->ifq_head = (m); \
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(ifq)->ifq_len++; \
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} while (0)
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#define IF_PREPEND(ifq, m) do { \
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IF_LOCK(ifq); \
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_IF_PREPEND(ifq, m); \
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IF_UNLOCK(ifq); \
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} while (0)
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#define _IF_DEQUEUE(ifq, m) do { \
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(m) = (ifq)->ifq_head; \
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if (m) { \
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if (((ifq)->ifq_head = (m)->m_nextpkt) == NULL) \
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(ifq)->ifq_tail = NULL; \
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(m)->m_nextpkt = NULL; \
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(ifq)->ifq_len--; \
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} \
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} while (0)
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#define IF_DEQUEUE(ifq, m) do { \
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IF_LOCK(ifq); \
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_IF_DEQUEUE(ifq, m); \
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IF_UNLOCK(ifq); \
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} while (0)
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#define _IF_POLL(ifq, m) ((m) = (ifq)->ifq_head)
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#define IF_POLL(ifq, m) _IF_POLL(ifq, m)
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#define _IF_DRAIN(ifq) do { \
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struct mbuf *m; \
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for (;;) { \
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_IF_DEQUEUE(ifq, m); \
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if (m == NULL) \
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break; \
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m_freem(m); \
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} \
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} while (0)
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#define IF_DRAIN(ifq) do { \
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IF_LOCK(ifq); \
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_IF_DRAIN(ifq); \
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IF_UNLOCK(ifq); \
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} while(0)
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#ifdef _KERNEL
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/* interface address change event */
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typedef void (*ifaddr_event_handler_t)(void *, struct ifnet *);
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EVENTHANDLER_DECLARE(ifaddr_event, ifaddr_event_handler_t);
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/* new interface arrival event */
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typedef void (*ifnet_arrival_event_handler_t)(void *, struct ifnet *);
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EVENTHANDLER_DECLARE(ifnet_arrival_event, ifnet_arrival_event_handler_t);
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/* interface departure event */
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typedef void (*ifnet_departure_event_handler_t)(void *, struct ifnet *);
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EVENTHANDLER_DECLARE(ifnet_departure_event, ifnet_departure_event_handler_t);
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/*
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* interface groups
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*/
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struct ifg_group {
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char ifg_group[IFNAMSIZ];
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u_int ifg_refcnt;
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void *ifg_pf_kif;
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TAILQ_HEAD(, ifg_member) ifg_members;
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TAILQ_ENTRY(ifg_group) ifg_next;
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};
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struct ifg_member {
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TAILQ_ENTRY(ifg_member) ifgm_next;
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struct ifnet *ifgm_ifp;
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};
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struct ifg_list {
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struct ifg_group *ifgl_group;
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TAILQ_ENTRY(ifg_list) ifgl_next;
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};
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/* group attach event */
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typedef void (*group_attach_event_handler_t)(void *, struct ifg_group *);
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EVENTHANDLER_DECLARE(group_attach_event, group_attach_event_handler_t);
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/* group detach event */
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typedef void (*group_detach_event_handler_t)(void *, struct ifg_group *);
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EVENTHANDLER_DECLARE(group_detach_event, group_detach_event_handler_t);
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/* group change event */
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typedef void (*group_change_event_handler_t)(void *, const char *);
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EVENTHANDLER_DECLARE(group_change_event, group_change_event_handler_t);
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#define IF_AFDATA_LOCK_INIT(ifp) \
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mtx_init(&(ifp)->if_afdata_mtx, "if_afdata", NULL, MTX_DEF)
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#define IF_AFDATA_LOCK(ifp) mtx_lock(&(ifp)->if_afdata_mtx)
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#define IF_AFDATA_TRYLOCK(ifp) mtx_trylock(&(ifp)->if_afdata_mtx)
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#define IF_AFDATA_UNLOCK(ifp) mtx_unlock(&(ifp)->if_afdata_mtx)
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#define IF_AFDATA_DESTROY(ifp) mtx_destroy(&(ifp)->if_afdata_mtx)
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#define IFF_LOCKGIANT(ifp) do { \
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if ((ifp)->if_flags & IFF_NEEDSGIANT) \
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mtx_lock(&Giant); \
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} while (0)
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#define IFF_UNLOCKGIANT(ifp) do { \
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if ((ifp)->if_flags & IFF_NEEDSGIANT) \
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mtx_unlock(&Giant); \
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} while (0)
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int if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp,
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int adjust);
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#define IF_HANDOFF(ifq, m, ifp) \
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if_handoff((struct ifqueue *)ifq, m, ifp, 0)
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#define IF_HANDOFF_ADJ(ifq, m, ifp, adj) \
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if_handoff((struct ifqueue *)ifq, m, ifp, adj)
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void if_start(struct ifnet *);
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#define IFQ_ENQUEUE(ifq, m, err) \
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do { \
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IF_LOCK(ifq); \
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if (ALTQ_IS_ENABLED(ifq)) \
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ALTQ_ENQUEUE(ifq, m, NULL, err); \
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else { \
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if (_IF_QFULL(ifq)) { \
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m_freem(m); \
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(err) = ENOBUFS; \
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} else { \
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_IF_ENQUEUE(ifq, m); \
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(err) = 0; \
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} \
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} \
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if (err) \
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(ifq)->ifq_drops++; \
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IF_UNLOCK(ifq); \
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} while (0)
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#define IFQ_DEQUEUE_NOLOCK(ifq, m) \
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do { \
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if (TBR_IS_ENABLED(ifq)) \
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(m) = tbr_dequeue_ptr(ifq, ALTDQ_REMOVE); \
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else if (ALTQ_IS_ENABLED(ifq)) \
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ALTQ_DEQUEUE(ifq, m); \
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else \
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_IF_DEQUEUE(ifq, m); \
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} while (0)
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#define IFQ_DEQUEUE(ifq, m) \
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do { \
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IF_LOCK(ifq); \
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IFQ_DEQUEUE_NOLOCK(ifq, m); \
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IF_UNLOCK(ifq); \
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} while (0)
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#define IFQ_POLL_NOLOCK(ifq, m) \
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do { \
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if (TBR_IS_ENABLED(ifq)) \
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(m) = tbr_dequeue_ptr(ifq, ALTDQ_POLL); \
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else if (ALTQ_IS_ENABLED(ifq)) \
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ALTQ_POLL(ifq, m); \
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else \
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_IF_POLL(ifq, m); \
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} while (0)
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#define IFQ_POLL(ifq, m) \
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do { \
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IF_LOCK(ifq); \
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|
IFQ_POLL_NOLOCK(ifq, m); \
|
|
IF_UNLOCK(ifq); \
|
|
} while (0)
|
|
|
|
#define IFQ_PURGE_NOLOCK(ifq) \
|
|
do { \
|
|
if (ALTQ_IS_ENABLED(ifq)) { \
|
|
ALTQ_PURGE(ifq); \
|
|
} else \
|
|
_IF_DRAIN(ifq); \
|
|
} while (0)
|
|
|
|
#define IFQ_PURGE(ifq) \
|
|
do { \
|
|
IF_LOCK(ifq); \
|
|
IFQ_PURGE_NOLOCK(ifq); \
|
|
IF_UNLOCK(ifq); \
|
|
} while (0)
|
|
|
|
#define IFQ_SET_READY(ifq) \
|
|
do { ((ifq)->altq_flags |= ALTQF_READY); } while (0)
|
|
|
|
#define IFQ_LOCK(ifq) IF_LOCK(ifq)
|
|
#define IFQ_UNLOCK(ifq) IF_UNLOCK(ifq)
|
|
#define IFQ_LOCK_ASSERT(ifq) IF_LOCK_ASSERT(ifq)
|
|
#define IFQ_IS_EMPTY(ifq) ((ifq)->ifq_len == 0)
|
|
#define IFQ_INC_LEN(ifq) ((ifq)->ifq_len++)
|
|
#define IFQ_DEC_LEN(ifq) (--(ifq)->ifq_len)
|
|
#define IFQ_INC_DROPS(ifq) ((ifq)->ifq_drops++)
|
|
#define IFQ_SET_MAXLEN(ifq, len) ((ifq)->ifq_maxlen = (len))
|
|
|
|
/*
|
|
* The IFF_DRV_OACTIVE test should really occur in the device driver, not in
|
|
* the handoff logic, as that flag is locked by the device driver.
|
|
*/
|
|
#define IFQ_HANDOFF_ADJ(ifp, m, adj, err) \
|
|
do { \
|
|
int len; \
|
|
short mflags; \
|
|
\
|
|
len = (m)->m_pkthdr.len; \
|
|
mflags = (m)->m_flags; \
|
|
IFQ_ENQUEUE(&(ifp)->if_snd, m, err); \
|
|
if ((err) == 0) { \
|
|
(ifp)->if_obytes += len + (adj); \
|
|
if (mflags & M_MCAST) \
|
|
(ifp)->if_omcasts++; \
|
|
if (((ifp)->if_drv_flags & IFF_DRV_OACTIVE) == 0) \
|
|
if_start(ifp); \
|
|
} \
|
|
} while (0)
|
|
|
|
#define IFQ_HANDOFF(ifp, m, err) \
|
|
IFQ_HANDOFF_ADJ(ifp, m, 0, err)
|
|
|
|
#define IFQ_DRV_DEQUEUE(ifq, m) \
|
|
do { \
|
|
(m) = (ifq)->ifq_drv_head; \
|
|
if (m) { \
|
|
if (((ifq)->ifq_drv_head = (m)->m_nextpkt) == NULL) \
|
|
(ifq)->ifq_drv_tail = NULL; \
|
|
(m)->m_nextpkt = NULL; \
|
|
(ifq)->ifq_drv_len--; \
|
|
} else { \
|
|
IFQ_LOCK(ifq); \
|
|
IFQ_DEQUEUE_NOLOCK(ifq, m); \
|
|
while ((ifq)->ifq_drv_len < (ifq)->ifq_drv_maxlen) { \
|
|
struct mbuf *m0; \
|
|
IFQ_DEQUEUE_NOLOCK(ifq, m0); \
|
|
if (m0 == NULL) \
|
|
break; \
|
|
m0->m_nextpkt = NULL; \
|
|
if ((ifq)->ifq_drv_tail == NULL) \
|
|
(ifq)->ifq_drv_head = m0; \
|
|
else \
|
|
(ifq)->ifq_drv_tail->m_nextpkt = m0; \
|
|
(ifq)->ifq_drv_tail = m0; \
|
|
(ifq)->ifq_drv_len++; \
|
|
} \
|
|
IFQ_UNLOCK(ifq); \
|
|
} \
|
|
} while (0)
|
|
|
|
#define IFQ_DRV_PREPEND(ifq, m) \
|
|
do { \
|
|
(m)->m_nextpkt = (ifq)->ifq_drv_head; \
|
|
if ((ifq)->ifq_drv_tail == NULL) \
|
|
(ifq)->ifq_drv_tail = (m); \
|
|
(ifq)->ifq_drv_head = (m); \
|
|
(ifq)->ifq_drv_len++; \
|
|
} while (0)
|
|
|
|
#define IFQ_DRV_IS_EMPTY(ifq) \
|
|
(((ifq)->ifq_drv_len == 0) && ((ifq)->ifq_len == 0))
|
|
|
|
#define IFQ_DRV_PURGE(ifq) \
|
|
do { \
|
|
struct mbuf *m, *n = (ifq)->ifq_drv_head; \
|
|
while((m = n) != NULL) { \
|
|
n = m->m_nextpkt; \
|
|
m_freem(m); \
|
|
} \
|
|
(ifq)->ifq_drv_head = (ifq)->ifq_drv_tail = NULL; \
|
|
(ifq)->ifq_drv_len = 0; \
|
|
IFQ_PURGE(ifq); \
|
|
} while (0)
|
|
|
|
/*
|
|
* 72 was chosen below because it is the size of a TCP/IP
|
|
* header (40) + the minimum mss (32).
|
|
*/
|
|
#define IF_MINMTU 72
|
|
#define IF_MAXMTU 65535
|
|
|
|
#endif /* _KERNEL */
|
|
|
|
/*
|
|
* The ifaddr structure contains information about one address
|
|
* of an interface. They are maintained by the different address families,
|
|
* are allocated and attached when an address is set, and are linked
|
|
* together so all addresses for an interface can be located.
|
|
*
|
|
* NOTE: a 'struct ifaddr' is always at the beginning of a larger
|
|
* chunk of malloc'ed memory, where we store the three addresses
|
|
* (ifa_addr, ifa_dstaddr and ifa_netmask) referenced here.
|
|
*/
|
|
struct ifaddr {
|
|
struct sockaddr *ifa_addr; /* address of interface */
|
|
struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */
|
|
#define ifa_broadaddr ifa_dstaddr /* broadcast address interface */
|
|
struct sockaddr *ifa_netmask; /* used to determine subnet */
|
|
struct if_data if_data; /* not all members are meaningful */
|
|
struct ifnet *ifa_ifp; /* back-pointer to interface */
|
|
TAILQ_ENTRY(ifaddr) ifa_link; /* queue macro glue */
|
|
void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */
|
|
(int, struct rtentry *, struct rt_addrinfo *);
|
|
u_short ifa_flags; /* mostly rt_flags for cloning */
|
|
u_int ifa_refcnt; /* references to this structure */
|
|
int ifa_metric; /* cost of going out this interface */
|
|
int (*ifa_claim_addr) /* check if an addr goes to this if */
|
|
(struct ifaddr *, struct sockaddr *);
|
|
struct mtx ifa_mtx;
|
|
};
|
|
#define IFA_ROUTE RTF_UP /* route installed */
|
|
|
|
/* for compatibility with other BSDs */
|
|
#define ifa_list ifa_link
|
|
|
|
#define IFA_LOCK_INIT(ifa) \
|
|
mtx_init(&(ifa)->ifa_mtx, "ifaddr", NULL, MTX_DEF)
|
|
#define IFA_LOCK(ifa) mtx_lock(&(ifa)->ifa_mtx)
|
|
#define IFA_UNLOCK(ifa) mtx_unlock(&(ifa)->ifa_mtx)
|
|
#define IFA_DESTROY(ifa) mtx_destroy(&(ifa)->ifa_mtx)
|
|
|
|
/*
|
|
* The prefix structure contains information about one prefix
|
|
* of an interface. They are maintained by the different address families,
|
|
* are allocated and attached when a prefix or an address is set,
|
|
* and are linked together so all prefixes for an interface can be located.
|
|
*/
|
|
struct ifprefix {
|
|
struct sockaddr *ifpr_prefix; /* prefix of interface */
|
|
struct ifnet *ifpr_ifp; /* back-pointer to interface */
|
|
TAILQ_ENTRY(ifprefix) ifpr_list; /* queue macro glue */
|
|
u_char ifpr_plen; /* prefix length in bits */
|
|
u_char ifpr_type; /* protocol dependent prefix type */
|
|
};
|
|
|
|
/*
|
|
* Multicast address structure. This is analogous to the ifaddr
|
|
* structure except that it keeps track of multicast addresses.
|
|
*/
|
|
struct ifmultiaddr {
|
|
TAILQ_ENTRY(ifmultiaddr) ifma_link; /* queue macro glue */
|
|
struct sockaddr *ifma_addr; /* address this membership is for */
|
|
struct sockaddr *ifma_lladdr; /* link-layer translation, if any */
|
|
struct ifnet *ifma_ifp; /* back-pointer to interface */
|
|
u_int ifma_refcount; /* reference count */
|
|
void *ifma_protospec; /* protocol-specific state, if any */
|
|
struct ifmultiaddr *ifma_llifma; /* pointer to ifma for ifma_lladdr */
|
|
};
|
|
|
|
#ifdef _KERNEL
|
|
#define IFAFREE(ifa) \
|
|
do { \
|
|
IFA_LOCK(ifa); \
|
|
KASSERT((ifa)->ifa_refcnt > 0, \
|
|
("ifa %p !(ifa_refcnt > 0)", ifa)); \
|
|
if (--(ifa)->ifa_refcnt == 0) { \
|
|
IFA_DESTROY(ifa); \
|
|
free(ifa, M_IFADDR); \
|
|
} else \
|
|
IFA_UNLOCK(ifa); \
|
|
} while (0)
|
|
|
|
#define IFAREF(ifa) \
|
|
do { \
|
|
IFA_LOCK(ifa); \
|
|
++(ifa)->ifa_refcnt; \
|
|
IFA_UNLOCK(ifa); \
|
|
} while (0)
|
|
|
|
extern struct mtx ifnet_lock;
|
|
#define IFNET_LOCK_INIT() \
|
|
mtx_init(&ifnet_lock, "ifnet", NULL, MTX_DEF | MTX_RECURSE)
|
|
#define IFNET_WLOCK() mtx_lock(&ifnet_lock)
|
|
#define IFNET_WUNLOCK() mtx_unlock(&ifnet_lock)
|
|
#define IFNET_WLOCK_ASSERT() mtx_assert(&ifnet_lock, MA_OWNED)
|
|
#define IFNET_RLOCK() IFNET_WLOCK()
|
|
#define IFNET_RUNLOCK() IFNET_WUNLOCK()
|
|
|
|
struct ifindex_entry {
|
|
struct ifnet *ife_ifnet;
|
|
struct cdev *ife_dev;
|
|
};
|
|
|
|
struct ifnet *ifnet_byindex(u_short idx);
|
|
|
|
/*
|
|
* Given the index, ifaddr_byindex() returns the one and only
|
|
* link-level ifaddr for the interface. You are not supposed to use
|
|
* it to traverse the list of addresses associated to the interface.
|
|
*/
|
|
struct ifaddr *ifaddr_byindex(u_short idx);
|
|
struct cdev *ifdev_byindex(u_short idx);
|
|
|
|
extern struct ifnethead ifnet;
|
|
extern int ifqmaxlen;
|
|
extern struct ifnet *loif; /* first loopback interface */
|
|
extern int if_index;
|
|
|
|
int if_addgroup(struct ifnet *, const char *);
|
|
int if_delgroup(struct ifnet *, const char *);
|
|
int if_addmulti(struct ifnet *, struct sockaddr *, struct ifmultiaddr **);
|
|
int if_allmulti(struct ifnet *, int);
|
|
struct ifnet* if_alloc(u_char);
|
|
void if_attach(struct ifnet *);
|
|
int if_delmulti(struct ifnet *, struct sockaddr *);
|
|
void if_delmulti_ifma(struct ifmultiaddr *);
|
|
void if_detach(struct ifnet *);
|
|
void if_purgeaddrs(struct ifnet *);
|
|
void if_purgemaddrs(struct ifnet *);
|
|
void if_down(struct ifnet *);
|
|
struct ifmultiaddr *
|
|
if_findmulti(struct ifnet *, struct sockaddr *);
|
|
void if_free(struct ifnet *);
|
|
void if_free_type(struct ifnet *, u_char);
|
|
void if_initname(struct ifnet *, const char *, int);
|
|
void if_link_state_change(struct ifnet *, int);
|
|
int if_printf(struct ifnet *, const char *, ...) __printflike(2, 3);
|
|
int if_setlladdr(struct ifnet *, const u_char *, int);
|
|
void if_up(struct ifnet *);
|
|
/*void ifinit(void);*/ /* declared in systm.h for main() */
|
|
int ifioctl(struct socket *, u_long, caddr_t, struct thread *);
|
|
int ifpromisc(struct ifnet *, int);
|
|
struct ifnet *ifunit(const char *);
|
|
|
|
void ifq_attach(struct ifaltq *, struct ifnet *ifp);
|
|
void ifq_detach(struct ifaltq *);
|
|
|
|
struct ifaddr *ifa_ifwithaddr(struct sockaddr *);
|
|
struct ifaddr *ifa_ifwithbroadaddr(struct sockaddr *);
|
|
struct ifaddr *ifa_ifwithdstaddr(struct sockaddr *);
|
|
struct ifaddr *ifa_ifwithnet(struct sockaddr *);
|
|
struct ifaddr *ifa_ifwithroute(int, struct sockaddr *, struct sockaddr *);
|
|
struct ifaddr *ifa_ifwithroute_fib(int, struct sockaddr *, struct sockaddr *, u_int);
|
|
|
|
struct ifaddr *ifaof_ifpforaddr(struct sockaddr *, struct ifnet *);
|
|
|
|
int if_simloop(struct ifnet *ifp, struct mbuf *m, int af, int hlen);
|
|
|
|
typedef void *if_com_alloc_t(u_char type, struct ifnet *ifp);
|
|
typedef void if_com_free_t(void *com, u_char type);
|
|
void if_register_com_alloc(u_char type, if_com_alloc_t *a, if_com_free_t *f);
|
|
void if_deregister_com_alloc(u_char type);
|
|
|
|
#define IF_LLADDR(ifp) \
|
|
LLADDR((struct sockaddr_dl *)((ifp)->if_addr->ifa_addr))
|
|
|
|
#ifdef DEVICE_POLLING
|
|
enum poll_cmd { POLL_ONLY, POLL_AND_CHECK_STATUS };
|
|
|
|
typedef void poll_handler_t(struct ifnet *ifp, enum poll_cmd cmd, int count);
|
|
int ether_poll_register(poll_handler_t *h, struct ifnet *ifp);
|
|
int ether_poll_deregister(struct ifnet *ifp);
|
|
#endif /* DEVICE_POLLING */
|
|
|
|
#include <net/vnet.h>
|
|
|
|
#endif /* _KERNEL */
|
|
|
|
#endif /* !_NET_IF_VAR_H_ */
|