1896 lines
44 KiB
C
1896 lines
44 KiB
C
/* $OpenBSD: if_trunk.c,v 1.30 2007/01/31 06:20:19 reyk Exp $ */
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/*
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* Copyright (c) 2005, 2006 Reyk Floeter <reyk@openbsd.org>
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* Copyright (c) 2007 Andrew Thompson <thompsa@FreeBSD.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_inet.h"
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#include "opt_inet6.h"
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/queue.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <sys/sysctl.h>
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#include <sys/module.h>
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#include <sys/priv.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/hash.h>
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#include <sys/lock.h>
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#include <sys/rwlock.h>
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#include <sys/taskqueue.h>
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#include <sys/eventhandler.h>
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#include <net/ethernet.h>
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#include <net/if.h>
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#include <net/if_clone.h>
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#include <net/if_arp.h>
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#include <net/if_dl.h>
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#include <net/if_llc.h>
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#include <net/if_media.h>
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#include <net/if_types.h>
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#include <net/if_var.h>
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#include <net/bpf.h>
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#if defined(INET) || defined(INET6)
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#include <netinet/in.h>
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#endif
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#ifdef INET
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#include <netinet/in_systm.h>
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#include <netinet/if_ether.h>
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#include <netinet/ip.h>
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#endif
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#ifdef INET6
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#include <netinet/ip6.h>
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#endif
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#include <net/if_vlan_var.h>
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#include <net/if_lagg.h>
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#include <net/ieee8023ad_lacp.h>
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/* Special flags we should propagate to the lagg ports. */
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static struct {
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int flag;
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int (*func)(struct ifnet *, int);
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} lagg_pflags[] = {
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{IFF_PROMISC, ifpromisc},
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{IFF_ALLMULTI, if_allmulti},
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{0, NULL}
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};
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SLIST_HEAD(__trhead, lagg_softc) lagg_list; /* list of laggs */
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static struct mtx lagg_list_mtx;
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eventhandler_tag lagg_detach_cookie = NULL;
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static int lagg_clone_create(struct if_clone *, int, caddr_t);
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static void lagg_clone_destroy(struct ifnet *);
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static void lagg_lladdr(struct lagg_softc *, uint8_t *);
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static void lagg_capabilities(struct lagg_softc *);
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static void lagg_port_lladdr(struct lagg_port *, uint8_t *);
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static void lagg_port_setlladdr(void *, int);
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static int lagg_port_create(struct lagg_softc *, struct ifnet *);
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static int lagg_port_destroy(struct lagg_port *, int);
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static struct mbuf *lagg_input(struct ifnet *, struct mbuf *);
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static void lagg_linkstate(struct lagg_softc *);
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static void lagg_port_state(struct ifnet *, int);
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static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t);
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static int lagg_port_output(struct ifnet *, struct mbuf *,
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struct sockaddr *, struct route *);
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static void lagg_port_ifdetach(void *arg __unused, struct ifnet *);
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#ifdef LAGG_PORT_STACKING
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static int lagg_port_checkstacking(struct lagg_softc *);
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#endif
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static void lagg_port2req(struct lagg_port *, struct lagg_reqport *);
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static void lagg_init(void *);
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static void lagg_stop(struct lagg_softc *);
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static int lagg_ioctl(struct ifnet *, u_long, caddr_t);
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static int lagg_ether_setmulti(struct lagg_softc *);
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static int lagg_ether_cmdmulti(struct lagg_port *, int);
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static int lagg_setflag(struct lagg_port *, int, int,
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int (*func)(struct ifnet *, int));
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static int lagg_setflags(struct lagg_port *, int status);
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static int lagg_transmit(struct ifnet *, struct mbuf *);
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static void lagg_qflush(struct ifnet *);
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static int lagg_media_change(struct ifnet *);
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static void lagg_media_status(struct ifnet *, struct ifmediareq *);
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static struct lagg_port *lagg_link_active(struct lagg_softc *,
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struct lagg_port *);
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static const void *lagg_gethdr(struct mbuf *, u_int, u_int, void *);
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IFC_SIMPLE_DECLARE(lagg, 0);
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/* Simple round robin */
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static int lagg_rr_attach(struct lagg_softc *);
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static int lagg_rr_detach(struct lagg_softc *);
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static int lagg_rr_start(struct lagg_softc *, struct mbuf *);
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static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *,
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struct mbuf *);
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/* Active failover */
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static int lagg_fail_attach(struct lagg_softc *);
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static int lagg_fail_detach(struct lagg_softc *);
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static int lagg_fail_start(struct lagg_softc *, struct mbuf *);
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static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *,
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struct mbuf *);
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/* Loadbalancing */
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static int lagg_lb_attach(struct lagg_softc *);
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static int lagg_lb_detach(struct lagg_softc *);
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static int lagg_lb_port_create(struct lagg_port *);
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static void lagg_lb_port_destroy(struct lagg_port *);
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static int lagg_lb_start(struct lagg_softc *, struct mbuf *);
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static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *,
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struct mbuf *);
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static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *);
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/* 802.3ad LACP */
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static int lagg_lacp_attach(struct lagg_softc *);
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static int lagg_lacp_detach(struct lagg_softc *);
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static int lagg_lacp_start(struct lagg_softc *, struct mbuf *);
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static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *,
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struct mbuf *);
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static void lagg_lacp_lladdr(struct lagg_softc *);
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/* lagg protocol table */
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static const struct {
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int ti_proto;
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int (*ti_attach)(struct lagg_softc *);
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} lagg_protos[] = {
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{ LAGG_PROTO_ROUNDROBIN, lagg_rr_attach },
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{ LAGG_PROTO_FAILOVER, lagg_fail_attach },
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{ LAGG_PROTO_LOADBALANCE, lagg_lb_attach },
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{ LAGG_PROTO_ETHERCHANNEL, lagg_lb_attach },
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{ LAGG_PROTO_LACP, lagg_lacp_attach },
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{ LAGG_PROTO_NONE, NULL }
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};
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SYSCTL_DECL(_net_link);
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static SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW, 0,
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"Link Aggregation");
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static int lagg_failover_rx_all = 0; /* Allow input on any failover links */
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SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW,
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&lagg_failover_rx_all, 0,
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"Accept input from any interface in a failover lagg");
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static int def_use_flowid = 1; /* Default value for using M_FLOWID */
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TUNABLE_INT("net.link.lagg.default_use_flowid", &def_use_flowid);
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SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid, CTLFLAG_RW,
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&def_use_flowid, 0,
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"Default setting for using flow id for load sharing");
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static int
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lagg_modevent(module_t mod, int type, void *data)
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{
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switch (type) {
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case MOD_LOAD:
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mtx_init(&lagg_list_mtx, "if_lagg list", NULL, MTX_DEF);
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SLIST_INIT(&lagg_list);
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if_clone_attach(&lagg_cloner);
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lagg_input_p = lagg_input;
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lagg_linkstate_p = lagg_port_state;
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lagg_detach_cookie = EVENTHANDLER_REGISTER(
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ifnet_departure_event, lagg_port_ifdetach, NULL,
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EVENTHANDLER_PRI_ANY);
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break;
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case MOD_UNLOAD:
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EVENTHANDLER_DEREGISTER(ifnet_departure_event,
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lagg_detach_cookie);
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if_clone_detach(&lagg_cloner);
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lagg_input_p = NULL;
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lagg_linkstate_p = NULL;
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mtx_destroy(&lagg_list_mtx);
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break;
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default:
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return (EOPNOTSUPP);
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}
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return (0);
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}
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static moduledata_t lagg_mod = {
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"if_lagg",
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lagg_modevent,
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0
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};
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DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
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MODULE_VERSION(if_lagg, 1);
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#if __FreeBSD_version >= 800000
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/*
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* This routine is run via an vlan
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* config EVENT
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*/
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static void
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lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag)
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{
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struct lagg_softc *sc = ifp->if_softc;
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struct lagg_port *lp;
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if (ifp->if_softc != arg) /* Not our event */
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return;
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LAGG_RLOCK(sc);
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if (!SLIST_EMPTY(&sc->sc_ports)) {
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SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
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EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag);
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}
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LAGG_RUNLOCK(sc);
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}
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/*
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* This routine is run via an vlan
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* unconfig EVENT
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*/
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static void
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lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag)
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{
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struct lagg_softc *sc = ifp->if_softc;
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struct lagg_port *lp;
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if (ifp->if_softc != arg) /* Not our event */
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return;
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LAGG_RLOCK(sc);
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if (!SLIST_EMPTY(&sc->sc_ports)) {
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SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
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EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag);
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}
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LAGG_RUNLOCK(sc);
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}
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#endif
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static int
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lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params)
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{
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struct lagg_softc *sc;
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struct ifnet *ifp;
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int i, error = 0;
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static const u_char eaddr[6]; /* 00:00:00:00:00:00 */
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struct sysctl_oid *oid;
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char num[14]; /* sufficient for 32 bits */
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sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO);
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ifp = sc->sc_ifp = if_alloc(IFT_ETHER);
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if (ifp == NULL) {
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free(sc, M_DEVBUF);
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return (ENOSPC);
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}
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sysctl_ctx_init(&sc->ctx);
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snprintf(num, sizeof(num), "%u", unit);
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sc->use_flowid = def_use_flowid;
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oid = SYSCTL_ADD_NODE(&sc->ctx, &SYSCTL_NODE_CHILDREN(_net_link, lagg),
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OID_AUTO, num, CTLFLAG_RD, NULL, "");
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SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
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"use_flowid", CTLTYPE_INT|CTLFLAG_RW, &sc->use_flowid, sc->use_flowid,
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"Use flow id for load sharing");
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/* Hash all layers by default */
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sc->sc_flags = LAGG_F_HASHL2|LAGG_F_HASHL3|LAGG_F_HASHL4;
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sc->sc_proto = LAGG_PROTO_NONE;
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for (i = 0; lagg_protos[i].ti_proto != LAGG_PROTO_NONE; i++) {
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if (lagg_protos[i].ti_proto == LAGG_PROTO_DEFAULT) {
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sc->sc_proto = lagg_protos[i].ti_proto;
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if ((error = lagg_protos[i].ti_attach(sc)) != 0) {
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if_free(ifp);
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free(sc, M_DEVBUF);
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return (error);
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}
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break;
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}
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}
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LAGG_LOCK_INIT(sc);
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SLIST_INIT(&sc->sc_ports);
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TASK_INIT(&sc->sc_lladdr_task, 0, lagg_port_setlladdr, sc);
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/* Initialise pseudo media types */
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ifmedia_init(&sc->sc_media, 0, lagg_media_change,
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lagg_media_status);
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ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL);
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ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO);
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if_initname(ifp, ifc->ifc_name, unit);
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ifp->if_softc = sc;
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ifp->if_transmit = lagg_transmit;
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ifp->if_qflush = lagg_qflush;
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ifp->if_init = lagg_init;
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ifp->if_ioctl = lagg_ioctl;
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ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
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/*
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* Attach as an ordinary ethernet device, children will be attached
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* as special device IFT_IEEE8023ADLAG.
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*/
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ether_ifattach(ifp, eaddr);
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#if __FreeBSD_version >= 800000
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sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config,
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lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST);
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sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig,
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lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST);
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#endif
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/* Insert into the global list of laggs */
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mtx_lock(&lagg_list_mtx);
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SLIST_INSERT_HEAD(&lagg_list, sc, sc_entries);
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mtx_unlock(&lagg_list_mtx);
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return (0);
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}
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static void
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lagg_clone_destroy(struct ifnet *ifp)
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{
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struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
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struct lagg_port *lp;
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LAGG_WLOCK(sc);
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lagg_stop(sc);
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ifp->if_flags &= ~IFF_UP;
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#if __FreeBSD_version >= 800000
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EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach);
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EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach);
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#endif
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/* Shutdown and remove lagg ports */
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while ((lp = SLIST_FIRST(&sc->sc_ports)) != NULL)
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lagg_port_destroy(lp, 1);
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/* Unhook the aggregation protocol */
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if (sc->sc_detach != NULL)
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(*sc->sc_detach)(sc);
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LAGG_WUNLOCK(sc);
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sysctl_ctx_free(&sc->ctx);
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ifmedia_removeall(&sc->sc_media);
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ether_ifdetach(ifp);
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if_free(ifp);
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mtx_lock(&lagg_list_mtx);
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SLIST_REMOVE(&lagg_list, sc, lagg_softc, sc_entries);
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mtx_unlock(&lagg_list_mtx);
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taskqueue_drain(taskqueue_swi, &sc->sc_lladdr_task);
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LAGG_LOCK_DESTROY(sc);
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free(sc, M_DEVBUF);
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}
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static void
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lagg_lladdr(struct lagg_softc *sc, uint8_t *lladdr)
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{
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struct ifnet *ifp = sc->sc_ifp;
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if (memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0)
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return;
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bcopy(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN);
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/* Let the protocol know the MAC has changed */
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if (sc->sc_lladdr != NULL)
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(*sc->sc_lladdr)(sc);
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EVENTHANDLER_INVOKE(iflladdr_event, ifp);
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}
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static void
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lagg_capabilities(struct lagg_softc *sc)
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{
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struct lagg_port *lp;
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int cap = ~0, ena = ~0;
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u_long hwa = ~0UL;
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LAGG_WLOCK_ASSERT(sc);
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/* Get capabilities from the lagg ports */
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SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
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cap &= lp->lp_ifp->if_capabilities;
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ena &= lp->lp_ifp->if_capenable;
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hwa &= lp->lp_ifp->if_hwassist;
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}
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cap = (cap == ~0 ? 0 : cap);
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ena = (ena == ~0 ? 0 : ena);
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hwa = (hwa == ~0 ? 0 : hwa);
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if (sc->sc_ifp->if_capabilities != cap ||
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sc->sc_ifp->if_capenable != ena ||
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sc->sc_ifp->if_hwassist != hwa) {
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sc->sc_ifp->if_capabilities = cap;
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sc->sc_ifp->if_capenable = ena;
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sc->sc_ifp->if_hwassist = hwa;
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getmicrotime(&sc->sc_ifp->if_lastchange);
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if (sc->sc_ifflags & IFF_DEBUG)
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if_printf(sc->sc_ifp,
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"capabilities 0x%08x enabled 0x%08x\n", cap, ena);
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}
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}
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static void
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lagg_port_lladdr(struct lagg_port *lp, uint8_t *lladdr)
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{
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struct lagg_softc *sc = lp->lp_softc;
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struct ifnet *ifp = lp->lp_ifp;
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struct lagg_llq *llq;
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int pending = 0;
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LAGG_WLOCK_ASSERT(sc);
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if (lp->lp_detaching ||
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memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0)
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return;
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/* Check to make sure its not already queued to be changed */
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SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) {
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if (llq->llq_ifp == ifp) {
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pending = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!pending) {
|
|
llq = malloc(sizeof(struct lagg_llq), M_DEVBUF, M_NOWAIT);
|
|
if (llq == NULL) /* XXX what to do */
|
|
return;
|
|
}
|
|
|
|
/* Update the lladdr even if pending, it may have changed */
|
|
llq->llq_ifp = ifp;
|
|
bcopy(lladdr, llq->llq_lladdr, ETHER_ADDR_LEN);
|
|
|
|
if (!pending)
|
|
SLIST_INSERT_HEAD(&sc->sc_llq_head, llq, llq_entries);
|
|
|
|
taskqueue_enqueue(taskqueue_swi, &sc->sc_lladdr_task);
|
|
}
|
|
|
|
/*
|
|
* Set the interface MAC address from a taskqueue to avoid a LOR.
|
|
*/
|
|
static void
|
|
lagg_port_setlladdr(void *arg, int pending)
|
|
{
|
|
struct lagg_softc *sc = (struct lagg_softc *)arg;
|
|
struct lagg_llq *llq, *head;
|
|
struct ifnet *ifp;
|
|
int error;
|
|
|
|
/* Grab a local reference of the queue and remove it from the softc */
|
|
LAGG_WLOCK(sc);
|
|
head = SLIST_FIRST(&sc->sc_llq_head);
|
|
SLIST_FIRST(&sc->sc_llq_head) = NULL;
|
|
LAGG_WUNLOCK(sc);
|
|
|
|
/*
|
|
* Traverse the queue and set the lladdr on each ifp. It is safe to do
|
|
* unlocked as we have the only reference to it.
|
|
*/
|
|
for (llq = head; llq != NULL; llq = head) {
|
|
ifp = llq->llq_ifp;
|
|
|
|
/* Set the link layer address */
|
|
error = if_setlladdr(ifp, llq->llq_lladdr, ETHER_ADDR_LEN);
|
|
if (error)
|
|
printf("%s: setlladdr failed on %s\n", __func__,
|
|
ifp->if_xname);
|
|
|
|
head = SLIST_NEXT(llq, llq_entries);
|
|
free(llq, M_DEVBUF);
|
|
}
|
|
}
|
|
|
|
static int
|
|
lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp)
|
|
{
|
|
struct lagg_softc *sc_ptr;
|
|
struct lagg_port *lp;
|
|
int error = 0;
|
|
|
|
LAGG_WLOCK_ASSERT(sc);
|
|
|
|
/* Limit the maximal number of lagg ports */
|
|
if (sc->sc_count >= LAGG_MAX_PORTS)
|
|
return (ENOSPC);
|
|
|
|
/* Check if port has already been associated to a lagg */
|
|
if (ifp->if_lagg != NULL) {
|
|
/* Port is already in the current lagg? */
|
|
lp = (struct lagg_port *)ifp->if_lagg;
|
|
if (lp->lp_softc == sc)
|
|
return (EEXIST);
|
|
return (EBUSY);
|
|
}
|
|
|
|
/* XXX Disallow non-ethernet interfaces (this should be any of 802) */
|
|
if (ifp->if_type != IFT_ETHER)
|
|
return (EPROTONOSUPPORT);
|
|
|
|
/* Allow the first Ethernet member to define the MTU */
|
|
if (SLIST_EMPTY(&sc->sc_ports))
|
|
sc->sc_ifp->if_mtu = ifp->if_mtu;
|
|
else if (sc->sc_ifp->if_mtu != ifp->if_mtu) {
|
|
if_printf(sc->sc_ifp, "invalid MTU for %s\n",
|
|
ifp->if_xname);
|
|
return (EINVAL);
|
|
}
|
|
|
|
if ((lp = malloc(sizeof(struct lagg_port),
|
|
M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL)
|
|
return (ENOMEM);
|
|
|
|
/* Check if port is a stacked lagg */
|
|
mtx_lock(&lagg_list_mtx);
|
|
SLIST_FOREACH(sc_ptr, &lagg_list, sc_entries) {
|
|
if (ifp == sc_ptr->sc_ifp) {
|
|
mtx_unlock(&lagg_list_mtx);
|
|
free(lp, M_DEVBUF);
|
|
return (EINVAL);
|
|
/* XXX disable stacking for the moment, its untested */
|
|
#ifdef LAGG_PORT_STACKING
|
|
lp->lp_flags |= LAGG_PORT_STACK;
|
|
if (lagg_port_checkstacking(sc_ptr) >=
|
|
LAGG_MAX_STACKING) {
|
|
mtx_unlock(&lagg_list_mtx);
|
|
free(lp, M_DEVBUF);
|
|
return (E2BIG);
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
mtx_unlock(&lagg_list_mtx);
|
|
|
|
/* Change the interface type */
|
|
lp->lp_iftype = ifp->if_type;
|
|
ifp->if_type = IFT_IEEE8023ADLAG;
|
|
ifp->if_lagg = lp;
|
|
lp->lp_ioctl = ifp->if_ioctl;
|
|
ifp->if_ioctl = lagg_port_ioctl;
|
|
lp->lp_output = ifp->if_output;
|
|
ifp->if_output = lagg_port_output;
|
|
|
|
lp->lp_ifp = ifp;
|
|
lp->lp_softc = sc;
|
|
|
|
/* Save port link layer address */
|
|
bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN);
|
|
|
|
if (SLIST_EMPTY(&sc->sc_ports)) {
|
|
sc->sc_primary = lp;
|
|
lagg_lladdr(sc, IF_LLADDR(ifp));
|
|
} else {
|
|
/* Update link layer address for this port */
|
|
lagg_port_lladdr(lp, IF_LLADDR(sc->sc_ifp));
|
|
}
|
|
|
|
/* Insert into the list of ports */
|
|
SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries);
|
|
sc->sc_count++;
|
|
|
|
/* Update lagg capabilities */
|
|
lagg_capabilities(sc);
|
|
lagg_linkstate(sc);
|
|
|
|
/* Add multicast addresses and interface flags to this port */
|
|
lagg_ether_cmdmulti(lp, 1);
|
|
lagg_setflags(lp, 1);
|
|
|
|
if (sc->sc_port_create != NULL)
|
|
error = (*sc->sc_port_create)(lp);
|
|
if (error) {
|
|
/* remove the port again, without calling sc_port_destroy */
|
|
lagg_port_destroy(lp, 0);
|
|
return (error);
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
#ifdef LAGG_PORT_STACKING
|
|
static int
|
|
lagg_port_checkstacking(struct lagg_softc *sc)
|
|
{
|
|
struct lagg_softc *sc_ptr;
|
|
struct lagg_port *lp;
|
|
int m = 0;
|
|
|
|
LAGG_WLOCK_ASSERT(sc);
|
|
|
|
SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
|
|
if (lp->lp_flags & LAGG_PORT_STACK) {
|
|
sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc;
|
|
m = MAX(m, lagg_port_checkstacking(sc_ptr));
|
|
}
|
|
}
|
|
|
|
return (m + 1);
|
|
}
|
|
#endif
|
|
|
|
static int
|
|
lagg_port_destroy(struct lagg_port *lp, int runpd)
|
|
{
|
|
struct lagg_softc *sc = lp->lp_softc;
|
|
struct lagg_port *lp_ptr;
|
|
struct lagg_llq *llq;
|
|
struct ifnet *ifp = lp->lp_ifp;
|
|
|
|
LAGG_WLOCK_ASSERT(sc);
|
|
|
|
if (runpd && sc->sc_port_destroy != NULL)
|
|
(*sc->sc_port_destroy)(lp);
|
|
|
|
/*
|
|
* Remove multicast addresses and interface flags from this port and
|
|
* reset the MAC address, skip if the interface is being detached.
|
|
*/
|
|
if (!lp->lp_detaching) {
|
|
lagg_ether_cmdmulti(lp, 0);
|
|
lagg_setflags(lp, 0);
|
|
lagg_port_lladdr(lp, lp->lp_lladdr);
|
|
}
|
|
|
|
/* Restore interface */
|
|
ifp->if_type = lp->lp_iftype;
|
|
ifp->if_ioctl = lp->lp_ioctl;
|
|
ifp->if_output = lp->lp_output;
|
|
ifp->if_lagg = NULL;
|
|
|
|
/* Finally, remove the port from the lagg */
|
|
SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries);
|
|
sc->sc_count--;
|
|
|
|
/* Update the primary interface */
|
|
if (lp == sc->sc_primary) {
|
|
uint8_t lladdr[ETHER_ADDR_LEN];
|
|
|
|
if ((lp_ptr = SLIST_FIRST(&sc->sc_ports)) == NULL) {
|
|
bzero(&lladdr, ETHER_ADDR_LEN);
|
|
} else {
|
|
bcopy(lp_ptr->lp_lladdr,
|
|
lladdr, ETHER_ADDR_LEN);
|
|
}
|
|
lagg_lladdr(sc, lladdr);
|
|
sc->sc_primary = lp_ptr;
|
|
|
|
/* Update link layer address for each port */
|
|
SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries)
|
|
lagg_port_lladdr(lp_ptr, lladdr);
|
|
}
|
|
|
|
/* Remove any pending lladdr changes from the queue */
|
|
if (lp->lp_detaching) {
|
|
SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) {
|
|
if (llq->llq_ifp == ifp) {
|
|
SLIST_REMOVE(&sc->sc_llq_head, llq, lagg_llq,
|
|
llq_entries);
|
|
free(llq, M_DEVBUF);
|
|
break; /* Only appears once */
|
|
}
|
|
}
|
|
}
|
|
|
|
if (lp->lp_ifflags)
|
|
if_printf(ifp, "%s: lp_ifflags unclean\n", __func__);
|
|
|
|
free(lp, M_DEVBUF);
|
|
|
|
/* Update lagg capabilities */
|
|
lagg_capabilities(sc);
|
|
lagg_linkstate(sc);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
|
|
{
|
|
struct lagg_reqport *rp = (struct lagg_reqport *)data;
|
|
struct lagg_softc *sc;
|
|
struct lagg_port *lp = NULL;
|
|
int error = 0;
|
|
|
|
/* Should be checked by the caller */
|
|
if (ifp->if_type != IFT_IEEE8023ADLAG ||
|
|
(lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL)
|
|
goto fallback;
|
|
|
|
switch (cmd) {
|
|
case SIOCGLAGGPORT:
|
|
if (rp->rp_portname[0] == '\0' ||
|
|
ifunit(rp->rp_portname) != ifp) {
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
|
|
LAGG_RLOCK(sc);
|
|
if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) {
|
|
error = ENOENT;
|
|
LAGG_RUNLOCK(sc);
|
|
break;
|
|
}
|
|
|
|
lagg_port2req(lp, rp);
|
|
LAGG_RUNLOCK(sc);
|
|
break;
|
|
|
|
case SIOCSIFCAP:
|
|
if (lp->lp_ioctl == NULL) {
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
error = (*lp->lp_ioctl)(ifp, cmd, data);
|
|
if (error)
|
|
break;
|
|
|
|
/* Update lagg interface capabilities */
|
|
LAGG_WLOCK(sc);
|
|
lagg_capabilities(sc);
|
|
LAGG_WUNLOCK(sc);
|
|
break;
|
|
|
|
case SIOCSIFMTU:
|
|
/* Do not allow the MTU to be changed once joined */
|
|
error = EINVAL;
|
|
break;
|
|
|
|
default:
|
|
goto fallback;
|
|
}
|
|
|
|
return (error);
|
|
|
|
fallback:
|
|
if (lp->lp_ioctl != NULL)
|
|
return ((*lp->lp_ioctl)(ifp, cmd, data));
|
|
|
|
return (EINVAL);
|
|
}
|
|
|
|
/*
|
|
* For direct output to child ports.
|
|
*/
|
|
static int
|
|
lagg_port_output(struct ifnet *ifp, struct mbuf *m,
|
|
struct sockaddr *dst, struct route *ro)
|
|
{
|
|
struct lagg_port *lp = ifp->if_lagg;
|
|
|
|
switch (dst->sa_family) {
|
|
case pseudo_AF_HDRCMPLT:
|
|
case AF_UNSPEC:
|
|
return ((*lp->lp_output)(ifp, m, dst, ro));
|
|
}
|
|
|
|
/* drop any other frames */
|
|
m_freem(m);
|
|
return (EBUSY);
|
|
}
|
|
|
|
static void
|
|
lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp)
|
|
{
|
|
struct lagg_port *lp;
|
|
struct lagg_softc *sc;
|
|
|
|
if ((lp = ifp->if_lagg) == NULL)
|
|
return;
|
|
/* If the ifnet is just being renamed, don't do anything. */
|
|
if (ifp->if_flags & IFF_RENAMING)
|
|
return;
|
|
|
|
sc = lp->lp_softc;
|
|
|
|
LAGG_WLOCK(sc);
|
|
lp->lp_detaching = 1;
|
|
lagg_port_destroy(lp, 1);
|
|
LAGG_WUNLOCK(sc);
|
|
}
|
|
|
|
static void
|
|
lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp)
|
|
{
|
|
struct lagg_softc *sc = lp->lp_softc;
|
|
|
|
strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname));
|
|
strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname));
|
|
rp->rp_prio = lp->lp_prio;
|
|
rp->rp_flags = lp->lp_flags;
|
|
if (sc->sc_portreq != NULL)
|
|
(*sc->sc_portreq)(lp, (caddr_t)&rp->rp_psc);
|
|
|
|
/* Add protocol specific flags */
|
|
switch (sc->sc_proto) {
|
|
case LAGG_PROTO_FAILOVER:
|
|
if (lp == sc->sc_primary)
|
|
rp->rp_flags |= LAGG_PORT_MASTER;
|
|
if (lp == lagg_link_active(sc, sc->sc_primary))
|
|
rp->rp_flags |= LAGG_PORT_ACTIVE;
|
|
break;
|
|
|
|
case LAGG_PROTO_ROUNDROBIN:
|
|
case LAGG_PROTO_LOADBALANCE:
|
|
case LAGG_PROTO_ETHERCHANNEL:
|
|
if (LAGG_PORTACTIVE(lp))
|
|
rp->rp_flags |= LAGG_PORT_ACTIVE;
|
|
break;
|
|
|
|
case LAGG_PROTO_LACP:
|
|
/* LACP has a different definition of active */
|
|
if (lacp_isactive(lp))
|
|
rp->rp_flags |= LAGG_PORT_ACTIVE;
|
|
if (lacp_iscollecting(lp))
|
|
rp->rp_flags |= LAGG_PORT_COLLECTING;
|
|
if (lacp_isdistributing(lp))
|
|
rp->rp_flags |= LAGG_PORT_DISTRIBUTING;
|
|
break;
|
|
}
|
|
|
|
}
|
|
|
|
static void
|
|
lagg_init(void *xsc)
|
|
{
|
|
struct lagg_softc *sc = (struct lagg_softc *)xsc;
|
|
struct lagg_port *lp;
|
|
struct ifnet *ifp = sc->sc_ifp;
|
|
|
|
if (ifp->if_drv_flags & IFF_DRV_RUNNING)
|
|
return;
|
|
|
|
LAGG_WLOCK(sc);
|
|
|
|
ifp->if_drv_flags |= IFF_DRV_RUNNING;
|
|
/* Update the port lladdrs */
|
|
SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
|
|
lagg_port_lladdr(lp, IF_LLADDR(ifp));
|
|
|
|
if (sc->sc_init != NULL)
|
|
(*sc->sc_init)(sc);
|
|
|
|
LAGG_WUNLOCK(sc);
|
|
}
|
|
|
|
static void
|
|
lagg_stop(struct lagg_softc *sc)
|
|
{
|
|
struct ifnet *ifp = sc->sc_ifp;
|
|
|
|
LAGG_WLOCK_ASSERT(sc);
|
|
|
|
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
|
|
return;
|
|
|
|
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
|
|
|
|
if (sc->sc_stop != NULL)
|
|
(*sc->sc_stop)(sc);
|
|
}
|
|
|
|
static int
|
|
lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
|
|
{
|
|
struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
|
|
struct lagg_reqall *ra = (struct lagg_reqall *)data;
|
|
struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf;
|
|
struct lagg_reqflags *rf = (struct lagg_reqflags *)data;
|
|
struct ifreq *ifr = (struct ifreq *)data;
|
|
struct lagg_port *lp;
|
|
struct ifnet *tpif;
|
|
struct thread *td = curthread;
|
|
char *buf, *outbuf;
|
|
int count, buflen, len, error = 0;
|
|
|
|
bzero(&rpbuf, sizeof(rpbuf));
|
|
|
|
switch (cmd) {
|
|
case SIOCGLAGG:
|
|
LAGG_RLOCK(sc);
|
|
count = 0;
|
|
SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
|
|
count++;
|
|
buflen = count * sizeof(struct lagg_reqport);
|
|
LAGG_RUNLOCK(sc);
|
|
|
|
outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO);
|
|
|
|
LAGG_RLOCK(sc);
|
|
ra->ra_proto = sc->sc_proto;
|
|
if (sc->sc_req != NULL)
|
|
(*sc->sc_req)(sc, (caddr_t)&ra->ra_psc);
|
|
|
|
count = 0;
|
|
buf = outbuf;
|
|
len = min(ra->ra_size, buflen);
|
|
SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
|
|
if (len < sizeof(rpbuf))
|
|
break;
|
|
|
|
lagg_port2req(lp, &rpbuf);
|
|
memcpy(buf, &rpbuf, sizeof(rpbuf));
|
|
count++;
|
|
buf += sizeof(rpbuf);
|
|
len -= sizeof(rpbuf);
|
|
}
|
|
LAGG_RUNLOCK(sc);
|
|
ra->ra_ports = count;
|
|
ra->ra_size = count * sizeof(rpbuf);
|
|
error = copyout(outbuf, ra->ra_port, ra->ra_size);
|
|
free(outbuf, M_TEMP);
|
|
break;
|
|
case SIOCSLAGG:
|
|
error = priv_check(td, PRIV_NET_LAGG);
|
|
if (error)
|
|
break;
|
|
if (ra->ra_proto >= LAGG_PROTO_MAX) {
|
|
error = EPROTONOSUPPORT;
|
|
break;
|
|
}
|
|
LAGG_WLOCK(sc);
|
|
if (sc->sc_proto != LAGG_PROTO_NONE) {
|
|
/* Reset protocol first in case detach unlocks */
|
|
sc->sc_proto = LAGG_PROTO_NONE;
|
|
error = sc->sc_detach(sc);
|
|
sc->sc_detach = NULL;
|
|
sc->sc_start = NULL;
|
|
sc->sc_input = NULL;
|
|
sc->sc_port_create = NULL;
|
|
sc->sc_port_destroy = NULL;
|
|
sc->sc_linkstate = NULL;
|
|
sc->sc_init = NULL;
|
|
sc->sc_stop = NULL;
|
|
sc->sc_lladdr = NULL;
|
|
sc->sc_req = NULL;
|
|
sc->sc_portreq = NULL;
|
|
} else if (sc->sc_input != NULL) {
|
|
/* Still detaching */
|
|
error = EBUSY;
|
|
}
|
|
if (error != 0) {
|
|
LAGG_WUNLOCK(sc);
|
|
break;
|
|
}
|
|
for (int i = 0; i < (sizeof(lagg_protos) /
|
|
sizeof(lagg_protos[0])); i++) {
|
|
if (lagg_protos[i].ti_proto == ra->ra_proto) {
|
|
if (sc->sc_ifflags & IFF_DEBUG)
|
|
printf("%s: using proto %u\n",
|
|
sc->sc_ifname,
|
|
lagg_protos[i].ti_proto);
|
|
sc->sc_proto = lagg_protos[i].ti_proto;
|
|
if (sc->sc_proto != LAGG_PROTO_NONE)
|
|
error = lagg_protos[i].ti_attach(sc);
|
|
LAGG_WUNLOCK(sc);
|
|
return (error);
|
|
}
|
|
}
|
|
LAGG_WUNLOCK(sc);
|
|
error = EPROTONOSUPPORT;
|
|
break;
|
|
case SIOCGLAGGFLAGS:
|
|
rf->rf_flags = sc->sc_flags;
|
|
break;
|
|
case SIOCSLAGGHASH:
|
|
error = priv_check(td, PRIV_NET_LAGG);
|
|
if (error)
|
|
break;
|
|
if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) {
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
LAGG_WLOCK(sc);
|
|
sc->sc_flags &= ~LAGG_F_HASHMASK;
|
|
sc->sc_flags |= rf->rf_flags & LAGG_F_HASHMASK;
|
|
LAGG_WUNLOCK(sc);
|
|
break;
|
|
case SIOCGLAGGPORT:
|
|
if (rp->rp_portname[0] == '\0' ||
|
|
(tpif = ifunit(rp->rp_portname)) == NULL) {
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
|
|
LAGG_RLOCK(sc);
|
|
if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL ||
|
|
lp->lp_softc != sc) {
|
|
error = ENOENT;
|
|
LAGG_RUNLOCK(sc);
|
|
break;
|
|
}
|
|
|
|
lagg_port2req(lp, rp);
|
|
LAGG_RUNLOCK(sc);
|
|
break;
|
|
case SIOCSLAGGPORT:
|
|
error = priv_check(td, PRIV_NET_LAGG);
|
|
if (error)
|
|
break;
|
|
if (rp->rp_portname[0] == '\0' ||
|
|
(tpif = ifunit(rp->rp_portname)) == NULL) {
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
LAGG_WLOCK(sc);
|
|
error = lagg_port_create(sc, tpif);
|
|
LAGG_WUNLOCK(sc);
|
|
break;
|
|
case SIOCSLAGGDELPORT:
|
|
error = priv_check(td, PRIV_NET_LAGG);
|
|
if (error)
|
|
break;
|
|
if (rp->rp_portname[0] == '\0' ||
|
|
(tpif = ifunit(rp->rp_portname)) == NULL) {
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
|
|
LAGG_WLOCK(sc);
|
|
if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL ||
|
|
lp->lp_softc != sc) {
|
|
error = ENOENT;
|
|
LAGG_WUNLOCK(sc);
|
|
break;
|
|
}
|
|
|
|
error = lagg_port_destroy(lp, 1);
|
|
LAGG_WUNLOCK(sc);
|
|
break;
|
|
case SIOCSIFFLAGS:
|
|
/* Set flags on ports too */
|
|
LAGG_WLOCK(sc);
|
|
SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
|
|
lagg_setflags(lp, 1);
|
|
}
|
|
LAGG_WUNLOCK(sc);
|
|
|
|
if (!(ifp->if_flags & IFF_UP) &&
|
|
(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
|
|
/*
|
|
* If interface is marked down and it is running,
|
|
* then stop and disable it.
|
|
*/
|
|
LAGG_WLOCK(sc);
|
|
lagg_stop(sc);
|
|
LAGG_WUNLOCK(sc);
|
|
} else if ((ifp->if_flags & IFF_UP) &&
|
|
!(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
|
|
/*
|
|
* If interface is marked up and it is stopped, then
|
|
* start it.
|
|
*/
|
|
(*ifp->if_init)(sc);
|
|
}
|
|
break;
|
|
case SIOCADDMULTI:
|
|
case SIOCDELMULTI:
|
|
LAGG_WLOCK(sc);
|
|
error = lagg_ether_setmulti(sc);
|
|
LAGG_WUNLOCK(sc);
|
|
break;
|
|
case SIOCSIFMEDIA:
|
|
case SIOCGIFMEDIA:
|
|
error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd);
|
|
break;
|
|
|
|
case SIOCSIFCAP:
|
|
case SIOCSIFMTU:
|
|
/* Do not allow the MTU or caps to be directly changed */
|
|
error = EINVAL;
|
|
break;
|
|
|
|
default:
|
|
error = ether_ioctl(ifp, cmd, data);
|
|
break;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
lagg_ether_setmulti(struct lagg_softc *sc)
|
|
{
|
|
struct lagg_port *lp;
|
|
|
|
LAGG_WLOCK_ASSERT(sc);
|
|
|
|
SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
|
|
/* First, remove any existing filter entries. */
|
|
lagg_ether_cmdmulti(lp, 0);
|
|
/* copy all addresses from the lagg interface to the port */
|
|
lagg_ether_cmdmulti(lp, 1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
lagg_ether_cmdmulti(struct lagg_port *lp, int set)
|
|
{
|
|
struct lagg_softc *sc = lp->lp_softc;
|
|
struct ifnet *ifp = lp->lp_ifp;
|
|
struct ifnet *scifp = sc->sc_ifp;
|
|
struct lagg_mc *mc;
|
|
struct ifmultiaddr *ifma, *rifma = NULL;
|
|
struct sockaddr_dl sdl;
|
|
int error;
|
|
|
|
LAGG_WLOCK_ASSERT(sc);
|
|
|
|
bzero((char *)&sdl, sizeof(sdl));
|
|
sdl.sdl_len = sizeof(sdl);
|
|
sdl.sdl_family = AF_LINK;
|
|
sdl.sdl_type = IFT_ETHER;
|
|
sdl.sdl_alen = ETHER_ADDR_LEN;
|
|
sdl.sdl_index = ifp->if_index;
|
|
|
|
if (set) {
|
|
TAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) {
|
|
if (ifma->ifma_addr->sa_family != AF_LINK)
|
|
continue;
|
|
bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
|
|
LLADDR(&sdl), ETHER_ADDR_LEN);
|
|
|
|
error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma);
|
|
if (error)
|
|
return (error);
|
|
mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT);
|
|
if (mc == NULL)
|
|
return (ENOMEM);
|
|
mc->mc_ifma = rifma;
|
|
SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries);
|
|
}
|
|
} else {
|
|
while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) {
|
|
SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries);
|
|
if_delmulti_ifma(mc->mc_ifma);
|
|
free(mc, M_DEVBUF);
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/* Handle a ref counted flag that should be set on the lagg port as well */
|
|
static int
|
|
lagg_setflag(struct lagg_port *lp, int flag, int status,
|
|
int (*func)(struct ifnet *, int))
|
|
{
|
|
struct lagg_softc *sc = lp->lp_softc;
|
|
struct ifnet *scifp = sc->sc_ifp;
|
|
struct ifnet *ifp = lp->lp_ifp;
|
|
int error;
|
|
|
|
LAGG_WLOCK_ASSERT(sc);
|
|
|
|
status = status ? (scifp->if_flags & flag) : 0;
|
|
/* Now "status" contains the flag value or 0 */
|
|
|
|
/*
|
|
* See if recorded ports status is different from what
|
|
* we want it to be. If it is, flip it. We record ports
|
|
* status in lp_ifflags so that we won't clear ports flag
|
|
* we haven't set. In fact, we don't clear or set ports
|
|
* flags directly, but get or release references to them.
|
|
* That's why we can be sure that recorded flags still are
|
|
* in accord with actual ports flags.
|
|
*/
|
|
if (status != (lp->lp_ifflags & flag)) {
|
|
error = (*func)(ifp, status);
|
|
if (error)
|
|
return (error);
|
|
lp->lp_ifflags &= ~flag;
|
|
lp->lp_ifflags |= status;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Handle IFF_* flags that require certain changes on the lagg port
|
|
* if "status" is true, update ports flags respective to the lagg
|
|
* if "status" is false, forcedly clear the flags set on port.
|
|
*/
|
|
static int
|
|
lagg_setflags(struct lagg_port *lp, int status)
|
|
{
|
|
int error, i;
|
|
|
|
for (i = 0; lagg_pflags[i].flag; i++) {
|
|
error = lagg_setflag(lp, lagg_pflags[i].flag,
|
|
status, lagg_pflags[i].func);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
lagg_transmit(struct ifnet *ifp, struct mbuf *m)
|
|
{
|
|
struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
|
|
int error, len, mcast;
|
|
|
|
len = m->m_pkthdr.len;
|
|
mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1 : 0;
|
|
|
|
LAGG_RLOCK(sc);
|
|
/* We need a Tx algorithm and at least one port */
|
|
if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) {
|
|
LAGG_RUNLOCK(sc);
|
|
m_freem(m);
|
|
ifp->if_oerrors++;
|
|
return (ENXIO);
|
|
}
|
|
|
|
ETHER_BPF_MTAP(ifp, m);
|
|
|
|
error = (*sc->sc_start)(sc, m);
|
|
LAGG_RUNLOCK(sc);
|
|
|
|
if (error == 0) {
|
|
ifp->if_opackets++;
|
|
ifp->if_omcasts += mcast;
|
|
ifp->if_obytes += len;
|
|
} else
|
|
ifp->if_oerrors++;
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* The ifp->if_qflush entry point for lagg(4) is no-op.
|
|
*/
|
|
static void
|
|
lagg_qflush(struct ifnet *ifp __unused)
|
|
{
|
|
}
|
|
|
|
static struct mbuf *
|
|
lagg_input(struct ifnet *ifp, struct mbuf *m)
|
|
{
|
|
struct lagg_port *lp = ifp->if_lagg;
|
|
struct lagg_softc *sc = lp->lp_softc;
|
|
struct ifnet *scifp = sc->sc_ifp;
|
|
|
|
LAGG_RLOCK(sc);
|
|
if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ||
|
|
(lp->lp_flags & LAGG_PORT_DISABLED) ||
|
|
sc->sc_proto == LAGG_PROTO_NONE) {
|
|
LAGG_RUNLOCK(sc);
|
|
m_freem(m);
|
|
return (NULL);
|
|
}
|
|
|
|
ETHER_BPF_MTAP(scifp, m);
|
|
|
|
m = (*sc->sc_input)(sc, lp, m);
|
|
|
|
if (m != NULL) {
|
|
scifp->if_ipackets++;
|
|
scifp->if_ibytes += m->m_pkthdr.len;
|
|
|
|
if (scifp->if_flags & IFF_MONITOR) {
|
|
m_freem(m);
|
|
m = NULL;
|
|
}
|
|
}
|
|
|
|
LAGG_RUNLOCK(sc);
|
|
return (m);
|
|
}
|
|
|
|
static int
|
|
lagg_media_change(struct ifnet *ifp)
|
|
{
|
|
struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
|
|
|
|
if (sc->sc_ifflags & IFF_DEBUG)
|
|
printf("%s\n", __func__);
|
|
|
|
/* Ignore */
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr)
|
|
{
|
|
struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
|
|
struct lagg_port *lp;
|
|
|
|
imr->ifm_status = IFM_AVALID;
|
|
imr->ifm_active = IFM_ETHER | IFM_AUTO;
|
|
|
|
LAGG_RLOCK(sc);
|
|
SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
|
|
if (LAGG_PORTACTIVE(lp))
|
|
imr->ifm_status |= IFM_ACTIVE;
|
|
}
|
|
LAGG_RUNLOCK(sc);
|
|
}
|
|
|
|
static void
|
|
lagg_linkstate(struct lagg_softc *sc)
|
|
{
|
|
struct lagg_port *lp;
|
|
int new_link = LINK_STATE_DOWN;
|
|
uint64_t speed;
|
|
|
|
/* Our link is considered up if at least one of our ports is active */
|
|
SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
|
|
if (lp->lp_link_state == LINK_STATE_UP) {
|
|
new_link = LINK_STATE_UP;
|
|
break;
|
|
}
|
|
}
|
|
if_link_state_change(sc->sc_ifp, new_link);
|
|
|
|
/* Update if_baudrate to reflect the max possible speed */
|
|
switch (sc->sc_proto) {
|
|
case LAGG_PROTO_FAILOVER:
|
|
sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ?
|
|
sc->sc_primary->lp_ifp->if_baudrate : 0;
|
|
break;
|
|
case LAGG_PROTO_ROUNDROBIN:
|
|
case LAGG_PROTO_LOADBALANCE:
|
|
case LAGG_PROTO_ETHERCHANNEL:
|
|
speed = 0;
|
|
SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
|
|
speed += lp->lp_ifp->if_baudrate;
|
|
sc->sc_ifp->if_baudrate = speed;
|
|
break;
|
|
case LAGG_PROTO_LACP:
|
|
/* LACP updates if_baudrate itself */
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
lagg_port_state(struct ifnet *ifp, int state)
|
|
{
|
|
struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg;
|
|
struct lagg_softc *sc = NULL;
|
|
|
|
if (lp != NULL)
|
|
sc = lp->lp_softc;
|
|
if (sc == NULL)
|
|
return;
|
|
|
|
LAGG_WLOCK(sc);
|
|
lagg_linkstate(sc);
|
|
if (sc->sc_linkstate != NULL)
|
|
(*sc->sc_linkstate)(lp);
|
|
LAGG_WUNLOCK(sc);
|
|
}
|
|
|
|
struct lagg_port *
|
|
lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp)
|
|
{
|
|
struct lagg_port *lp_next, *rval = NULL;
|
|
// int new_link = LINK_STATE_DOWN;
|
|
|
|
LAGG_RLOCK_ASSERT(sc);
|
|
/*
|
|
* Search a port which reports an active link state.
|
|
*/
|
|
|
|
if (lp == NULL)
|
|
goto search;
|
|
if (LAGG_PORTACTIVE(lp)) {
|
|
rval = lp;
|
|
goto found;
|
|
}
|
|
if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL &&
|
|
LAGG_PORTACTIVE(lp_next)) {
|
|
rval = lp_next;
|
|
goto found;
|
|
}
|
|
|
|
search:
|
|
SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) {
|
|
if (LAGG_PORTACTIVE(lp_next)) {
|
|
rval = lp_next;
|
|
goto found;
|
|
}
|
|
}
|
|
|
|
found:
|
|
if (rval != NULL) {
|
|
/*
|
|
* The IEEE 802.1D standard assumes that a lagg with
|
|
* multiple ports is always full duplex. This is valid
|
|
* for load sharing laggs and if at least two links
|
|
* are active. Unfortunately, checking the latter would
|
|
* be too expensive at this point.
|
|
XXX
|
|
if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) &&
|
|
(sc->sc_count > 1))
|
|
new_link = LINK_STATE_FULL_DUPLEX;
|
|
else
|
|
new_link = rval->lp_link_state;
|
|
*/
|
|
}
|
|
|
|
return (rval);
|
|
}
|
|
|
|
static const void *
|
|
lagg_gethdr(struct mbuf *m, u_int off, u_int len, void *buf)
|
|
{
|
|
if (m->m_pkthdr.len < (off + len)) {
|
|
return (NULL);
|
|
} else if (m->m_len < (off + len)) {
|
|
m_copydata(m, off, len, buf);
|
|
return (buf);
|
|
}
|
|
return (mtod(m, char *) + off);
|
|
}
|
|
|
|
uint32_t
|
|
lagg_hashmbuf(struct lagg_softc *sc, struct mbuf *m, uint32_t key)
|
|
{
|
|
uint16_t etype;
|
|
uint32_t p = key;
|
|
int off;
|
|
struct ether_header *eh;
|
|
const struct ether_vlan_header *vlan;
|
|
#ifdef INET
|
|
const struct ip *ip;
|
|
const uint32_t *ports;
|
|
int iphlen;
|
|
#endif
|
|
#ifdef INET6
|
|
const struct ip6_hdr *ip6;
|
|
uint32_t flow;
|
|
#endif
|
|
union {
|
|
#ifdef INET
|
|
struct ip ip;
|
|
#endif
|
|
#ifdef INET6
|
|
struct ip6_hdr ip6;
|
|
#endif
|
|
struct ether_vlan_header vlan;
|
|
uint32_t port;
|
|
} buf;
|
|
|
|
|
|
off = sizeof(*eh);
|
|
if (m->m_len < off)
|
|
goto out;
|
|
eh = mtod(m, struct ether_header *);
|
|
etype = ntohs(eh->ether_type);
|
|
if (sc->sc_flags & LAGG_F_HASHL2) {
|
|
p = hash32_buf(&eh->ether_shost, ETHER_ADDR_LEN, p);
|
|
p = hash32_buf(&eh->ether_dhost, ETHER_ADDR_LEN, p);
|
|
}
|
|
|
|
/* Special handling for encapsulating VLAN frames */
|
|
if ((m->m_flags & M_VLANTAG) && (sc->sc_flags & LAGG_F_HASHL2)) {
|
|
p = hash32_buf(&m->m_pkthdr.ether_vtag,
|
|
sizeof(m->m_pkthdr.ether_vtag), p);
|
|
} else if (etype == ETHERTYPE_VLAN) {
|
|
vlan = lagg_gethdr(m, off, sizeof(*vlan), &buf);
|
|
if (vlan == NULL)
|
|
goto out;
|
|
|
|
if (sc->sc_flags & LAGG_F_HASHL2)
|
|
p = hash32_buf(&vlan->evl_tag, sizeof(vlan->evl_tag), p);
|
|
etype = ntohs(vlan->evl_proto);
|
|
off += sizeof(*vlan) - sizeof(*eh);
|
|
}
|
|
|
|
switch (etype) {
|
|
#ifdef INET
|
|
case ETHERTYPE_IP:
|
|
ip = lagg_gethdr(m, off, sizeof(*ip), &buf);
|
|
if (ip == NULL)
|
|
goto out;
|
|
|
|
if (sc->sc_flags & LAGG_F_HASHL3) {
|
|
p = hash32_buf(&ip->ip_src, sizeof(struct in_addr), p);
|
|
p = hash32_buf(&ip->ip_dst, sizeof(struct in_addr), p);
|
|
}
|
|
if (!(sc->sc_flags & LAGG_F_HASHL4))
|
|
break;
|
|
switch (ip->ip_p) {
|
|
case IPPROTO_TCP:
|
|
case IPPROTO_UDP:
|
|
case IPPROTO_SCTP:
|
|
iphlen = ip->ip_hl << 2;
|
|
if (iphlen < sizeof(*ip))
|
|
break;
|
|
off += iphlen;
|
|
ports = lagg_gethdr(m, off, sizeof(*ports), &buf);
|
|
if (ports == NULL)
|
|
break;
|
|
p = hash32_buf(ports, sizeof(*ports), p);
|
|
break;
|
|
}
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case ETHERTYPE_IPV6:
|
|
if (!(sc->sc_flags & LAGG_F_HASHL3))
|
|
break;
|
|
ip6 = lagg_gethdr(m, off, sizeof(*ip6), &buf);
|
|
if (ip6 == NULL)
|
|
goto out;
|
|
|
|
p = hash32_buf(&ip6->ip6_src, sizeof(struct in6_addr), p);
|
|
p = hash32_buf(&ip6->ip6_dst, sizeof(struct in6_addr), p);
|
|
flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK;
|
|
p = hash32_buf(&flow, sizeof(flow), p); /* IPv6 flow label */
|
|
break;
|
|
#endif
|
|
}
|
|
out:
|
|
return (p);
|
|
}
|
|
|
|
int
|
|
lagg_enqueue(struct ifnet *ifp, struct mbuf *m)
|
|
{
|
|
|
|
return (ifp->if_transmit)(ifp, m);
|
|
}
|
|
|
|
/*
|
|
* Simple round robin aggregation
|
|
*/
|
|
|
|
static int
|
|
lagg_rr_attach(struct lagg_softc *sc)
|
|
{
|
|
sc->sc_detach = lagg_rr_detach;
|
|
sc->sc_start = lagg_rr_start;
|
|
sc->sc_input = lagg_rr_input;
|
|
sc->sc_port_create = NULL;
|
|
sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX;
|
|
sc->sc_seq = 0;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
lagg_rr_detach(struct lagg_softc *sc)
|
|
{
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
lagg_rr_start(struct lagg_softc *sc, struct mbuf *m)
|
|
{
|
|
struct lagg_port *lp;
|
|
uint32_t p;
|
|
|
|
p = atomic_fetchadd_32(&sc->sc_seq, 1);
|
|
p %= sc->sc_count;
|
|
lp = SLIST_FIRST(&sc->sc_ports);
|
|
while (p--)
|
|
lp = SLIST_NEXT(lp, lp_entries);
|
|
|
|
/*
|
|
* Check the port's link state. This will return the next active
|
|
* port if the link is down or the port is NULL.
|
|
*/
|
|
if ((lp = lagg_link_active(sc, lp)) == NULL) {
|
|
m_freem(m);
|
|
return (ENOENT);
|
|
}
|
|
|
|
/* Send mbuf */
|
|
return (lagg_enqueue(lp->lp_ifp, m));
|
|
}
|
|
|
|
static struct mbuf *
|
|
lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
|
|
{
|
|
struct ifnet *ifp = sc->sc_ifp;
|
|
|
|
/* Just pass in the packet to our lagg device */
|
|
m->m_pkthdr.rcvif = ifp;
|
|
|
|
return (m);
|
|
}
|
|
|
|
/*
|
|
* Active failover
|
|
*/
|
|
|
|
static int
|
|
lagg_fail_attach(struct lagg_softc *sc)
|
|
{
|
|
sc->sc_detach = lagg_fail_detach;
|
|
sc->sc_start = lagg_fail_start;
|
|
sc->sc_input = lagg_fail_input;
|
|
sc->sc_port_create = NULL;
|
|
sc->sc_port_destroy = NULL;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
lagg_fail_detach(struct lagg_softc *sc)
|
|
{
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
lagg_fail_start(struct lagg_softc *sc, struct mbuf *m)
|
|
{
|
|
struct lagg_port *lp;
|
|
|
|
/* Use the master port if active or the next available port */
|
|
if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) {
|
|
m_freem(m);
|
|
return (ENOENT);
|
|
}
|
|
|
|
/* Send mbuf */
|
|
return (lagg_enqueue(lp->lp_ifp, m));
|
|
}
|
|
|
|
static struct mbuf *
|
|
lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
|
|
{
|
|
struct ifnet *ifp = sc->sc_ifp;
|
|
struct lagg_port *tmp_tp;
|
|
|
|
if (lp == sc->sc_primary || lagg_failover_rx_all) {
|
|
m->m_pkthdr.rcvif = ifp;
|
|
return (m);
|
|
}
|
|
|
|
if (!LAGG_PORTACTIVE(sc->sc_primary)) {
|
|
tmp_tp = lagg_link_active(sc, sc->sc_primary);
|
|
/*
|
|
* If tmp_tp is null, we've recieved a packet when all
|
|
* our links are down. Weird, but process it anyways.
|
|
*/
|
|
if ((tmp_tp == NULL || tmp_tp == lp)) {
|
|
m->m_pkthdr.rcvif = ifp;
|
|
return (m);
|
|
}
|
|
}
|
|
|
|
m_freem(m);
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Loadbalancing
|
|
*/
|
|
|
|
static int
|
|
lagg_lb_attach(struct lagg_softc *sc)
|
|
{
|
|
struct lagg_port *lp;
|
|
struct lagg_lb *lb;
|
|
|
|
if ((lb = (struct lagg_lb *)malloc(sizeof(struct lagg_lb),
|
|
M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL)
|
|
return (ENOMEM);
|
|
|
|
sc->sc_detach = lagg_lb_detach;
|
|
sc->sc_start = lagg_lb_start;
|
|
sc->sc_input = lagg_lb_input;
|
|
sc->sc_port_create = lagg_lb_port_create;
|
|
sc->sc_port_destroy = lagg_lb_port_destroy;
|
|
sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX;
|
|
|
|
lb->lb_key = arc4random();
|
|
sc->sc_psc = (caddr_t)lb;
|
|
|
|
SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
|
|
lagg_lb_port_create(lp);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
lagg_lb_detach(struct lagg_softc *sc)
|
|
{
|
|
struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc;
|
|
if (lb != NULL)
|
|
free(lb, M_DEVBUF);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp)
|
|
{
|
|
struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc;
|
|
struct lagg_port *lp_next;
|
|
int i = 0;
|
|
|
|
bzero(&lb->lb_ports, sizeof(lb->lb_ports));
|
|
SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) {
|
|
if (lp_next == lp)
|
|
continue;
|
|
if (i >= LAGG_MAX_PORTS)
|
|
return (EINVAL);
|
|
if (sc->sc_ifflags & IFF_DEBUG)
|
|
printf("%s: port %s at index %d\n",
|
|
sc->sc_ifname, lp_next->lp_ifname, i);
|
|
lb->lb_ports[i++] = lp_next;
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
lagg_lb_port_create(struct lagg_port *lp)
|
|
{
|
|
struct lagg_softc *sc = lp->lp_softc;
|
|
return (lagg_lb_porttable(sc, NULL));
|
|
}
|
|
|
|
static void
|
|
lagg_lb_port_destroy(struct lagg_port *lp)
|
|
{
|
|
struct lagg_softc *sc = lp->lp_softc;
|
|
lagg_lb_porttable(sc, lp);
|
|
}
|
|
|
|
static int
|
|
lagg_lb_start(struct lagg_softc *sc, struct mbuf *m)
|
|
{
|
|
struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc;
|
|
struct lagg_port *lp = NULL;
|
|
uint32_t p = 0;
|
|
|
|
if (sc->use_flowid && (m->m_flags & M_FLOWID))
|
|
p = m->m_pkthdr.flowid;
|
|
else
|
|
p = lagg_hashmbuf(sc, m, lb->lb_key);
|
|
p %= sc->sc_count;
|
|
lp = lb->lb_ports[p];
|
|
|
|
/*
|
|
* Check the port's link state. This will return the next active
|
|
* port if the link is down or the port is NULL.
|
|
*/
|
|
if ((lp = lagg_link_active(sc, lp)) == NULL) {
|
|
m_freem(m);
|
|
return (ENOENT);
|
|
}
|
|
|
|
/* Send mbuf */
|
|
return (lagg_enqueue(lp->lp_ifp, m));
|
|
}
|
|
|
|
static struct mbuf *
|
|
lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
|
|
{
|
|
struct ifnet *ifp = sc->sc_ifp;
|
|
|
|
/* Just pass in the packet to our lagg device */
|
|
m->m_pkthdr.rcvif = ifp;
|
|
|
|
return (m);
|
|
}
|
|
|
|
/*
|
|
* 802.3ad LACP
|
|
*/
|
|
|
|
static int
|
|
lagg_lacp_attach(struct lagg_softc *sc)
|
|
{
|
|
struct lagg_port *lp;
|
|
int error;
|
|
|
|
sc->sc_detach = lagg_lacp_detach;
|
|
sc->sc_port_create = lacp_port_create;
|
|
sc->sc_port_destroy = lacp_port_destroy;
|
|
sc->sc_linkstate = lacp_linkstate;
|
|
sc->sc_start = lagg_lacp_start;
|
|
sc->sc_input = lagg_lacp_input;
|
|
sc->sc_init = lacp_init;
|
|
sc->sc_stop = lacp_stop;
|
|
sc->sc_lladdr = lagg_lacp_lladdr;
|
|
sc->sc_req = lacp_req;
|
|
sc->sc_portreq = lacp_portreq;
|
|
|
|
error = lacp_attach(sc);
|
|
if (error)
|
|
return (error);
|
|
|
|
SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
|
|
lacp_port_create(lp);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
lagg_lacp_detach(struct lagg_softc *sc)
|
|
{
|
|
struct lagg_port *lp;
|
|
int error;
|
|
|
|
SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
|
|
lacp_port_destroy(lp);
|
|
|
|
/* unlocking is safe here */
|
|
LAGG_WUNLOCK(sc);
|
|
error = lacp_detach(sc);
|
|
LAGG_WLOCK(sc);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static void
|
|
lagg_lacp_lladdr(struct lagg_softc *sc)
|
|
{
|
|
struct lagg_port *lp;
|
|
|
|
/* purge all the lacp ports */
|
|
SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
|
|
lacp_port_destroy(lp);
|
|
|
|
/* add them back in */
|
|
SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
|
|
lacp_port_create(lp);
|
|
}
|
|
|
|
static int
|
|
lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m)
|
|
{
|
|
struct lagg_port *lp;
|
|
|
|
lp = lacp_select_tx_port(sc, m);
|
|
if (lp == NULL) {
|
|
m_freem(m);
|
|
return (EBUSY);
|
|
}
|
|
|
|
/* Send mbuf */
|
|
return (lagg_enqueue(lp->lp_ifp, m));
|
|
}
|
|
|
|
static struct mbuf *
|
|
lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
|
|
{
|
|
struct ifnet *ifp = sc->sc_ifp;
|
|
struct ether_header *eh;
|
|
u_short etype;
|
|
|
|
eh = mtod(m, struct ether_header *);
|
|
etype = ntohs(eh->ether_type);
|
|
|
|
/* Tap off LACP control messages */
|
|
if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) {
|
|
m = lacp_input(lp, m);
|
|
if (m == NULL)
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* If the port is not collecting or not in the active aggregator then
|
|
* free and return.
|
|
*/
|
|
if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) {
|
|
m_freem(m);
|
|
return (NULL);
|
|
}
|
|
|
|
m->m_pkthdr.rcvif = ifp;
|
|
return (m);
|
|
}
|