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freebsd/sys/net/if_lagg.c
John Baldwin 841613dcdc Use a dedicated malloc type for lagg(4)'s structures. 
Reviewed by:	gallatin
MFC after:	1 month
Sponsored by:	Netflix
Differential Revision:	https://reviews.freebsd.org/D19719
2019-03-28 21:00:54 +00:00

2268 lines
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/* $OpenBSD: if_trunk.c,v 1.30 2007/01/31 06:20:19 reyk Exp $ */
/*
* Copyright (c) 2005, 2006 Reyk Floeter <reyk@openbsd.org>
* Copyright (c) 2007 Andrew Thompson <thompsa@FreeBSD.org>
* Copyright (c) 2014, 2016 Marcelo Araujo <araujo@FreeBSD.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_inet.h"
#include "opt_inet6.h"
#include "opt_ratelimit.h"
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/sysctl.h>
#include <sys/module.h>
#include <sys/priv.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/lock.h>
#include <sys/rmlock.h>
#include <sys/sx.h>
#include <sys/taskqueue.h>
#include <sys/eventhandler.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_clone.h>
#include <net/if_arp.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_types.h>
#include <net/if_var.h>
#include <net/bpf.h>
#include <net/vnet.h>
#if defined(INET) || defined(INET6)
#include <netinet/in.h>
#include <netinet/ip.h>
#endif
#ifdef INET
#include <netinet/in_systm.h>
#include <netinet/if_ether.h>
#endif
#ifdef INET6
#include <netinet/ip6.h>
#include <netinet6/in6_var.h>
#include <netinet6/in6_ifattach.h>
#endif
#include <net/if_vlan_var.h>
#include <net/if_lagg.h>
#include <net/ieee8023ad_lacp.h>
#define LAGG_RLOCK() struct epoch_tracker lagg_et; epoch_enter_preempt(net_epoch_preempt, &lagg_et)
#define LAGG_RUNLOCK() epoch_exit_preempt(net_epoch_preempt, &lagg_et)
#define LAGG_RLOCK_ASSERT() MPASS(in_epoch(net_epoch_preempt))
#define LAGG_UNLOCK_ASSERT() MPASS(!in_epoch(net_epoch_preempt))
#define LAGG_SX_INIT(_sc) sx_init(&(_sc)->sc_sx, "if_lagg sx")
#define LAGG_SX_DESTROY(_sc) sx_destroy(&(_sc)->sc_sx)
#define LAGG_XLOCK(_sc) sx_xlock(&(_sc)->sc_sx)
#define LAGG_XUNLOCK(_sc) sx_xunlock(&(_sc)->sc_sx)
#define LAGG_SXLOCK_ASSERT(_sc) sx_assert(&(_sc)->sc_sx, SA_LOCKED)
#define LAGG_XLOCK_ASSERT(_sc) sx_assert(&(_sc)->sc_sx, SA_XLOCKED)
/* Special flags we should propagate to the lagg ports. */
static struct {
int flag;
int (*func)(struct ifnet *, int);
} lagg_pflags[] = {
{IFF_PROMISC, ifpromisc},
{IFF_ALLMULTI, if_allmulti},
{0, NULL}
};
VNET_DEFINE(SLIST_HEAD(__trhead, lagg_softc), lagg_list); /* list of laggs */
#define V_lagg_list VNET(lagg_list)
VNET_DEFINE_STATIC(struct mtx, lagg_list_mtx);
#define V_lagg_list_mtx VNET(lagg_list_mtx)
#define LAGG_LIST_LOCK_INIT(x) mtx_init(&V_lagg_list_mtx, \
"if_lagg list", NULL, MTX_DEF)
#define LAGG_LIST_LOCK_DESTROY(x) mtx_destroy(&V_lagg_list_mtx)
#define LAGG_LIST_LOCK(x) mtx_lock(&V_lagg_list_mtx)
#define LAGG_LIST_UNLOCK(x) mtx_unlock(&V_lagg_list_mtx)
eventhandler_tag lagg_detach_cookie = NULL;
static int lagg_clone_create(struct if_clone *, int, caddr_t);
static void lagg_clone_destroy(struct ifnet *);
VNET_DEFINE_STATIC(struct if_clone *, lagg_cloner);
#define V_lagg_cloner VNET(lagg_cloner)
static const char laggname[] = "lagg";
static MALLOC_DEFINE(M_LAGG, laggname, "802.3AD Link Aggregation Interface");
static void lagg_capabilities(struct lagg_softc *);
static int lagg_port_create(struct lagg_softc *, struct ifnet *);
static int lagg_port_destroy(struct lagg_port *, int);
static struct mbuf *lagg_input(struct ifnet *, struct mbuf *);
static void lagg_linkstate(struct lagg_softc *);
static void lagg_port_state(struct ifnet *, int);
static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t);
static int lagg_port_output(struct ifnet *, struct mbuf *,
const struct sockaddr *, struct route *);
static void lagg_port_ifdetach(void *arg __unused, struct ifnet *);
#ifdef LAGG_PORT_STACKING
static int lagg_port_checkstacking(struct lagg_softc *);
#endif
static void lagg_port2req(struct lagg_port *, struct lagg_reqport *);
static void lagg_init(void *);
static void lagg_stop(struct lagg_softc *);
static int lagg_ioctl(struct ifnet *, u_long, caddr_t);
#ifdef RATELIMIT
static int lagg_snd_tag_alloc(struct ifnet *,
union if_snd_tag_alloc_params *,
struct m_snd_tag **);
static void lagg_snd_tag_free(struct m_snd_tag *);
#endif
static int lagg_setmulti(struct lagg_port *);
static int lagg_clrmulti(struct lagg_port *);
static int lagg_setcaps(struct lagg_port *, int cap);
static int lagg_setflag(struct lagg_port *, int, int,
int (*func)(struct ifnet *, int));
static int lagg_setflags(struct lagg_port *, int status);
static uint64_t lagg_get_counter(struct ifnet *ifp, ift_counter cnt);
static int lagg_transmit(struct ifnet *, struct mbuf *);
static void lagg_qflush(struct ifnet *);
static int lagg_media_change(struct ifnet *);
static void lagg_media_status(struct ifnet *, struct ifmediareq *);
static struct lagg_port *lagg_link_active(struct lagg_softc *,
struct lagg_port *);
/* Simple round robin */
static void lagg_rr_attach(struct lagg_softc *);
static int lagg_rr_start(struct lagg_softc *, struct mbuf *);
static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *,
struct mbuf *);
/* Active failover */
static int lagg_fail_start(struct lagg_softc *, struct mbuf *);
static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *,
struct mbuf *);
/* Loadbalancing */
static void lagg_lb_attach(struct lagg_softc *);
static void lagg_lb_detach(struct lagg_softc *);
static int lagg_lb_port_create(struct lagg_port *);
static void lagg_lb_port_destroy(struct lagg_port *);
static int lagg_lb_start(struct lagg_softc *, struct mbuf *);
static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *,
struct mbuf *);
static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *);
/* Broadcast */
static int lagg_bcast_start(struct lagg_softc *, struct mbuf *);
static struct mbuf *lagg_bcast_input(struct lagg_softc *, struct lagg_port *,
struct mbuf *);
/* 802.3ad LACP */
static void lagg_lacp_attach(struct lagg_softc *);
static void lagg_lacp_detach(struct lagg_softc *);
static int lagg_lacp_start(struct lagg_softc *, struct mbuf *);
static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *,
struct mbuf *);
static void lagg_lacp_lladdr(struct lagg_softc *);
/* lagg protocol table */
static const struct lagg_proto {
lagg_proto pr_num;
void (*pr_attach)(struct lagg_softc *);
void (*pr_detach)(struct lagg_softc *);
int (*pr_start)(struct lagg_softc *, struct mbuf *);
struct mbuf * (*pr_input)(struct lagg_softc *, struct lagg_port *,
struct mbuf *);
int (*pr_addport)(struct lagg_port *);
void (*pr_delport)(struct lagg_port *);
void (*pr_linkstate)(struct lagg_port *);
void (*pr_init)(struct lagg_softc *);
void (*pr_stop)(struct lagg_softc *);
void (*pr_lladdr)(struct lagg_softc *);
void (*pr_request)(struct lagg_softc *, void *);
void (*pr_portreq)(struct lagg_port *, void *);
} lagg_protos[] = {
{
.pr_num = LAGG_PROTO_NONE
},
{
.pr_num = LAGG_PROTO_ROUNDROBIN,
.pr_attach = lagg_rr_attach,
.pr_start = lagg_rr_start,
.pr_input = lagg_rr_input,
},
{
.pr_num = LAGG_PROTO_FAILOVER,
.pr_start = lagg_fail_start,
.pr_input = lagg_fail_input,
},
{
.pr_num = LAGG_PROTO_LOADBALANCE,
.pr_attach = lagg_lb_attach,
.pr_detach = lagg_lb_detach,
.pr_start = lagg_lb_start,
.pr_input = lagg_lb_input,
.pr_addport = lagg_lb_port_create,
.pr_delport = lagg_lb_port_destroy,
},
{
.pr_num = LAGG_PROTO_LACP,
.pr_attach = lagg_lacp_attach,
.pr_detach = lagg_lacp_detach,
.pr_start = lagg_lacp_start,
.pr_input = lagg_lacp_input,
.pr_addport = lacp_port_create,
.pr_delport = lacp_port_destroy,
.pr_linkstate = lacp_linkstate,
.pr_init = lacp_init,
.pr_stop = lacp_stop,
.pr_lladdr = lagg_lacp_lladdr,
.pr_request = lacp_req,
.pr_portreq = lacp_portreq,
},
{
.pr_num = LAGG_PROTO_BROADCAST,
.pr_start = lagg_bcast_start,
.pr_input = lagg_bcast_input,
},
};
SYSCTL_DECL(_net_link);
SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW, 0,
"Link Aggregation");
/* Allow input on any failover links */
VNET_DEFINE_STATIC(int, lagg_failover_rx_all);
#define V_lagg_failover_rx_all VNET(lagg_failover_rx_all)
SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW | CTLFLAG_VNET,
&VNET_NAME(lagg_failover_rx_all), 0,
"Accept input from any interface in a failover lagg");
/* Default value for using flowid */
VNET_DEFINE_STATIC(int, def_use_flowid) = 0;
#define V_def_use_flowid VNET(def_use_flowid)
SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid, CTLFLAG_RWTUN,
&VNET_NAME(def_use_flowid), 0,
"Default setting for using flow id for load sharing");
/* Default value for flowid shift */
VNET_DEFINE_STATIC(int, def_flowid_shift) = 16;
#define V_def_flowid_shift VNET(def_flowid_shift)
SYSCTL_INT(_net_link_lagg, OID_AUTO, default_flowid_shift, CTLFLAG_RWTUN,
&VNET_NAME(def_flowid_shift), 0,
"Default setting for flowid shift for load sharing");
static void
vnet_lagg_init(const void *unused __unused)
{
LAGG_LIST_LOCK_INIT();
SLIST_INIT(&V_lagg_list);
V_lagg_cloner = if_clone_simple(laggname, lagg_clone_create,
lagg_clone_destroy, 0);
}
VNET_SYSINIT(vnet_lagg_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY,
vnet_lagg_init, NULL);
static void
vnet_lagg_uninit(const void *unused __unused)
{
if_clone_detach(V_lagg_cloner);
LAGG_LIST_LOCK_DESTROY();
}
VNET_SYSUNINIT(vnet_lagg_uninit, SI_SUB_INIT_IF, SI_ORDER_ANY,
vnet_lagg_uninit, NULL);
static int
lagg_modevent(module_t mod, int type, void *data)
{
switch (type) {
case MOD_LOAD:
lagg_input_p = lagg_input;
lagg_linkstate_p = lagg_port_state;
lagg_detach_cookie = EVENTHANDLER_REGISTER(
ifnet_departure_event, lagg_port_ifdetach, NULL,
EVENTHANDLER_PRI_ANY);
break;
case MOD_UNLOAD:
EVENTHANDLER_DEREGISTER(ifnet_departure_event,
lagg_detach_cookie);
lagg_input_p = NULL;
lagg_linkstate_p = NULL;
break;
default:
return (EOPNOTSUPP);
}
return (0);
}
static moduledata_t lagg_mod = {
"if_lagg",
lagg_modevent,
0
};
DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
MODULE_VERSION(if_lagg, 1);
static void
lagg_proto_attach(struct lagg_softc *sc, lagg_proto pr)
{
LAGG_XLOCK_ASSERT(sc);
KASSERT(sc->sc_proto == LAGG_PROTO_NONE, ("%s: sc %p has proto",
__func__, sc));
if (sc->sc_ifflags & IFF_DEBUG)
if_printf(sc->sc_ifp, "using proto %u\n", pr);
if (lagg_protos[pr].pr_attach != NULL)
lagg_protos[pr].pr_attach(sc);
sc->sc_proto = pr;
}
static void
lagg_proto_detach(struct lagg_softc *sc)
{
lagg_proto pr;
LAGG_XLOCK_ASSERT(sc);
pr = sc->sc_proto;
sc->sc_proto = LAGG_PROTO_NONE;
if (lagg_protos[pr].pr_detach != NULL)
lagg_protos[pr].pr_detach(sc);
}
static int
lagg_proto_start(struct lagg_softc *sc, struct mbuf *m)
{
return (lagg_protos[sc->sc_proto].pr_start(sc, m));
}
static struct mbuf *
lagg_proto_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
{
return (lagg_protos[sc->sc_proto].pr_input(sc, lp, m));
}
static int
lagg_proto_addport(struct lagg_softc *sc, struct lagg_port *lp)
{
if (lagg_protos[sc->sc_proto].pr_addport == NULL)
return (0);
else
return (lagg_protos[sc->sc_proto].pr_addport(lp));
}
static void
lagg_proto_delport(struct lagg_softc *sc, struct lagg_port *lp)
{
if (lagg_protos[sc->sc_proto].pr_delport != NULL)
lagg_protos[sc->sc_proto].pr_delport(lp);
}
static void
lagg_proto_linkstate(struct lagg_softc *sc, struct lagg_port *lp)
{
if (lagg_protos[sc->sc_proto].pr_linkstate != NULL)
lagg_protos[sc->sc_proto].pr_linkstate(lp);
}
static void
lagg_proto_init(struct lagg_softc *sc)
{
if (lagg_protos[sc->sc_proto].pr_init != NULL)
lagg_protos[sc->sc_proto].pr_init(sc);
}
static void
lagg_proto_stop(struct lagg_softc *sc)
{
if (lagg_protos[sc->sc_proto].pr_stop != NULL)
lagg_protos[sc->sc_proto].pr_stop(sc);
}
static void
lagg_proto_lladdr(struct lagg_softc *sc)
{
if (lagg_protos[sc->sc_proto].pr_lladdr != NULL)
lagg_protos[sc->sc_proto].pr_lladdr(sc);
}
static void
lagg_proto_request(struct lagg_softc *sc, void *v)
{
if (lagg_protos[sc->sc_proto].pr_request != NULL)
lagg_protos[sc->sc_proto].pr_request(sc, v);
}
static void
lagg_proto_portreq(struct lagg_softc *sc, struct lagg_port *lp, void *v)
{
if (lagg_protos[sc->sc_proto].pr_portreq != NULL)
lagg_protos[sc->sc_proto].pr_portreq(lp, v);
}
/*
* This routine is run via an vlan
* config EVENT
*/
static void
lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag)
{
struct lagg_softc *sc = ifp->if_softc;
struct lagg_port *lp;
if (ifp->if_softc != arg) /* Not our event */
return;
LAGG_RLOCK();
CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag);
LAGG_RUNLOCK();
}
/*
* This routine is run via an vlan
* unconfig EVENT
*/
static void
lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag)
{
struct lagg_softc *sc = ifp->if_softc;
struct lagg_port *lp;
if (ifp->if_softc != arg) /* Not our event */
return;
LAGG_RLOCK();
CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag);
LAGG_RUNLOCK();
}
static int
lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params)
{
struct lagg_softc *sc;
struct ifnet *ifp;
static const u_char eaddr[6]; /* 00:00:00:00:00:00 */
sc = malloc(sizeof(*sc), M_LAGG, M_WAITOK|M_ZERO);
ifp = sc->sc_ifp = if_alloc(IFT_ETHER);
if (ifp == NULL) {
free(sc, M_LAGG);
return (ENOSPC);
}
LAGG_SX_INIT(sc);
LAGG_XLOCK(sc);
if (V_def_use_flowid)
sc->sc_opts |= LAGG_OPT_USE_FLOWID;
sc->flowid_shift = V_def_flowid_shift;
/* Hash all layers by default */
sc->sc_flags = MBUF_HASHFLAG_L2|MBUF_HASHFLAG_L3|MBUF_HASHFLAG_L4;
lagg_proto_attach(sc, LAGG_PROTO_DEFAULT);
CK_SLIST_INIT(&sc->sc_ports);
/* Initialise pseudo media types */
ifmedia_init(&sc->sc_media, 0, lagg_media_change,
lagg_media_status);
ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL);
ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO);
if_initname(ifp, laggname, unit);
ifp->if_softc = sc;
ifp->if_transmit = lagg_transmit;
ifp->if_qflush = lagg_qflush;
ifp->if_init = lagg_init;
ifp->if_ioctl = lagg_ioctl;
ifp->if_get_counter = lagg_get_counter;
ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
#ifdef RATELIMIT
ifp->if_snd_tag_alloc = lagg_snd_tag_alloc;
ifp->if_snd_tag_free = lagg_snd_tag_free;
#endif
ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS;
/*
* Attach as an ordinary ethernet device, children will be attached
* as special device IFT_IEEE8023ADLAG.
*/
ether_ifattach(ifp, eaddr);
sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config,
lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST);
sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig,
lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST);
/* Insert into the global list of laggs */
LAGG_LIST_LOCK();
SLIST_INSERT_HEAD(&V_lagg_list, sc, sc_entries);
LAGG_LIST_UNLOCK();
LAGG_XUNLOCK(sc);
return (0);
}
static void
lagg_clone_destroy(struct ifnet *ifp)
{
struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
struct lagg_port *lp;
LAGG_XLOCK(sc);
sc->sc_destroying = 1;
lagg_stop(sc);
ifp->if_flags &= ~IFF_UP;
EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach);
EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach);
/* Shutdown and remove lagg ports */
while ((lp = CK_SLIST_FIRST(&sc->sc_ports)) != NULL)
lagg_port_destroy(lp, 1);
/* Unhook the aggregation protocol */
lagg_proto_detach(sc);
LAGG_XUNLOCK(sc);
ifmedia_removeall(&sc->sc_media);
ether_ifdetach(ifp);
if_free(ifp);
LAGG_LIST_LOCK();
SLIST_REMOVE(&V_lagg_list, sc, lagg_softc, sc_entries);
LAGG_LIST_UNLOCK();
LAGG_SX_DESTROY(sc);
free(sc, M_LAGG);
}
static void
lagg_capabilities(struct lagg_softc *sc)
{
struct lagg_port *lp;
int cap, ena, pena;
uint64_t hwa;
struct ifnet_hw_tsomax hw_tsomax;
LAGG_XLOCK_ASSERT(sc);
/* Get common enabled capabilities for the lagg ports */
ena = ~0;
CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
ena &= lp->lp_ifp->if_capenable;
ena = (ena == ~0 ? 0 : ena);
/*
* Apply common enabled capabilities back to the lagg ports.
* May require several iterations if they are dependent.
*/
do {
pena = ena;
CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
lagg_setcaps(lp, ena);
ena &= lp->lp_ifp->if_capenable;
}
} while (pena != ena);
/* Get other capabilities from the lagg ports */
cap = ~0;
hwa = ~(uint64_t)0;
memset(&hw_tsomax, 0, sizeof(hw_tsomax));
CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
cap &= lp->lp_ifp->if_capabilities;
hwa &= lp->lp_ifp->if_hwassist;
if_hw_tsomax_common(lp->lp_ifp, &hw_tsomax);
}
cap = (cap == ~0 ? 0 : cap);
hwa = (hwa == ~(uint64_t)0 ? 0 : hwa);
if (sc->sc_ifp->if_capabilities != cap ||
sc->sc_ifp->if_capenable != ena ||
sc->sc_ifp->if_hwassist != hwa ||
if_hw_tsomax_update(sc->sc_ifp, &hw_tsomax) != 0) {
sc->sc_ifp->if_capabilities = cap;
sc->sc_ifp->if_capenable = ena;
sc->sc_ifp->if_hwassist = hwa;
getmicrotime(&sc->sc_ifp->if_lastchange);
if (sc->sc_ifflags & IFF_DEBUG)
if_printf(sc->sc_ifp,
"capabilities 0x%08x enabled 0x%08x\n", cap, ena);
}
}
static int
lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp)
{
struct lagg_softc *sc_ptr;
struct lagg_port *lp, *tlp;
struct ifreq ifr;
int error, i, oldmtu;
uint64_t *pval;
LAGG_XLOCK_ASSERT(sc);
if (sc->sc_ifp == ifp) {
if_printf(sc->sc_ifp,
"cannot add a lagg to itself as a port\n");
return (EINVAL);
}
/* 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 && ifp->if_type != IFT_L2VLAN)
return (EPROTONOSUPPORT);
/* Allow the first Ethernet member to define the MTU */
oldmtu = -1;
if (CK_SLIST_EMPTY(&sc->sc_ports)) {
sc->sc_ifp->if_mtu = ifp->if_mtu;
} else if (sc->sc_ifp->if_mtu != ifp->if_mtu) {
if (ifp->if_ioctl == NULL) {
if_printf(sc->sc_ifp, "cannot change MTU for %s\n",
ifp->if_xname);
return (EINVAL);
}
oldmtu = ifp->if_mtu;
strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name));
ifr.ifr_mtu = sc->sc_ifp->if_mtu;
error = (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr);
if (error != 0) {
if_printf(sc->sc_ifp, "invalid MTU for %s\n",
ifp->if_xname);
return (error);
}
ifr.ifr_mtu = oldmtu;
}
lp = malloc(sizeof(struct lagg_port), M_LAGG, M_WAITOK|M_ZERO);
lp->lp_softc = sc;
/* Check if port is a stacked lagg */
LAGG_LIST_LOCK();
SLIST_FOREACH(sc_ptr, &V_lagg_list, sc_entries) {
if (ifp == sc_ptr->sc_ifp) {
LAGG_LIST_UNLOCK();
free(lp, M_LAGG);
if (oldmtu != -1)
(*ifp->if_ioctl)(ifp, SIOCSIFMTU,
(caddr_t)&ifr);
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) {
LAGG_LIST_UNLOCK();
free(lp, M_LAGG);
if (oldmtu != -1)
(*ifp->if_ioctl)(ifp, SIOCSIFMTU,
(caddr_t)&ifr);
return (E2BIG);
}
#endif
}
}
LAGG_LIST_UNLOCK();
if_ref(ifp);
lp->lp_ifp = ifp;
bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN);
lp->lp_ifcapenable = ifp->if_capenable;
if (CK_SLIST_EMPTY(&sc->sc_ports)) {
bcopy(IF_LLADDR(ifp), IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN);
lagg_proto_lladdr(sc);
EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp);
} else {
if_setlladdr(ifp, IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN);
}
lagg_setflags(lp, 1);
if (CK_SLIST_EMPTY(&sc->sc_ports))
sc->sc_primary = lp;
/* 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;
/* Read port counters */
pval = lp->port_counters.val;
for (i = 0; i < IFCOUNTERS; i++, pval++)
*pval = ifp->if_get_counter(ifp, i);
/*
* Insert into the list of ports.
* Keep ports sorted by if_index. It is handy, when configuration
* is predictable and `ifconfig laggN create ...` command
* will lead to the same result each time.
*/
CK_SLIST_FOREACH(tlp, &sc->sc_ports, lp_entries) {
if (tlp->lp_ifp->if_index < ifp->if_index && (
CK_SLIST_NEXT(tlp, lp_entries) == NULL ||
((struct lagg_port*)CK_SLIST_NEXT(tlp, lp_entries))->lp_ifp->if_index >
ifp->if_index))
break;
}
if (tlp != NULL)
CK_SLIST_INSERT_AFTER(tlp, lp, lp_entries);
else
CK_SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries);
sc->sc_count++;
lagg_setmulti(lp);
if ((error = lagg_proto_addport(sc, lp)) != 0) {
/* Remove the port, without calling pr_delport. */
lagg_port_destroy(lp, 0);
if (oldmtu != -1)
(*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr);
return (error);
}
/* Update lagg capabilities */
lagg_capabilities(sc);
lagg_linkstate(sc);
return (0);
}
#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_SXLOCK_ASSERT(sc);
CK_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 void
lagg_port_destroy_cb(epoch_context_t ec)
{
struct lagg_port *lp;
struct ifnet *ifp;
lp = __containerof(ec, struct lagg_port, lp_epoch_ctx);
ifp = lp->lp_ifp;
if_rele(ifp);
free(lp, M_LAGG);
}
static int
lagg_port_destroy(struct lagg_port *lp, int rundelport)
{
struct lagg_softc *sc = lp->lp_softc;
struct lagg_port *lp_ptr, *lp0;
struct ifnet *ifp = lp->lp_ifp;
uint64_t *pval, vdiff;
int i;
LAGG_XLOCK_ASSERT(sc);
if (rundelport)
lagg_proto_delport(sc, lp);
if (lp->lp_detaching == 0)
lagg_clrmulti(lp);
/* Restore interface */
ifp->if_type = lp->lp_iftype;
ifp->if_ioctl = lp->lp_ioctl;
ifp->if_output = lp->lp_output;
ifp->if_lagg = NULL;
/* Update detached port counters */
pval = lp->port_counters.val;
for (i = 0; i < IFCOUNTERS; i++, pval++) {
vdiff = ifp->if_get_counter(ifp, i) - *pval;
sc->detached_counters.val[i] += vdiff;
}
/* Finally, remove the port from the lagg */
CK_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 ((lp0 = CK_SLIST_FIRST(&sc->sc_ports)) == NULL)
bzero(&lladdr, ETHER_ADDR_LEN);
else
bcopy(lp0->lp_lladdr, lladdr, ETHER_ADDR_LEN);
sc->sc_primary = lp0;
if (sc->sc_destroying == 0) {
bcopy(lladdr, IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN);
lagg_proto_lladdr(sc);
EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp);
}
/*
* Update lladdr for each port (new primary needs update
* as well, to switch from old lladdr to its 'real' one)
*/
CK_SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries)
if_setlladdr(lp_ptr->lp_ifp, lladdr, ETHER_ADDR_LEN);
}
if (lp->lp_ifflags)
if_printf(ifp, "%s: lp_ifflags unclean\n", __func__);
if (lp->lp_detaching == 0) {
lagg_setflags(lp, 0);
lagg_setcaps(lp, lp->lp_ifcapenable);
if_setlladdr(ifp, lp->lp_lladdr, ETHER_ADDR_LEN);
}
/*
* free port and release it's ifnet reference after a grace period has
* elapsed.
*/
epoch_call(net_epoch_preempt, &lp->lp_epoch_ctx, lagg_port_destroy_cb);
/* 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();
if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) {
error = ENOENT;
LAGG_RUNLOCK();
break;
}
lagg_port2req(lp, rp);
LAGG_RUNLOCK();
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_XLOCK(sc);
lagg_capabilities(sc);
LAGG_XUNLOCK(sc);
VLAN_CAPABILITIES(sc->sc_ifp);
break;
case SIOCSIFMTU:
/* Do not allow the MTU to be changed once joined */
error = EINVAL;
break;
default:
goto fallback;
}
return (error);
fallback:
if (lp != NULL && lp->lp_ioctl != NULL)
return ((*lp->lp_ioctl)(ifp, cmd, data));
return (EINVAL);
}
/*
* Requests counter @cnt data.
*
* Counter value is calculated the following way:
* 1) for each port, sum difference between current and "initial" measurements.
* 2) add lagg logical interface counters.
* 3) add data from detached_counters array.
*
* We also do the following things on ports attach/detach:
* 1) On port attach we store all counters it has into port_counter array.
* 2) On port detach we add the different between "initial" and
* current counters data to detached_counters array.
*/
static uint64_t
lagg_get_counter(struct ifnet *ifp, ift_counter cnt)
{
struct lagg_softc *sc;
struct lagg_port *lp;
struct ifnet *lpifp;
uint64_t newval, oldval, vsum;
/* Revise this when we've got non-generic counters. */
KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
sc = (struct lagg_softc *)ifp->if_softc;
vsum = 0;
LAGG_RLOCK();
CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
/* Saved attached value */
oldval = lp->port_counters.val[cnt];
/* current value */
lpifp = lp->lp_ifp;
newval = lpifp->if_get_counter(lpifp, cnt);
/* Calculate diff and save new */
vsum += newval - oldval;
}
LAGG_RUNLOCK();
/*
* Add counter data which might be added by upper
* layer protocols operating on logical interface.
*/
vsum += if_get_counter_default(ifp, cnt);
/*
* Add counter data from detached ports counters
*/
vsum += sc->detached_counters.val[cnt];
return (vsum);
}
/*
* For direct output to child ports.
*/
static int
lagg_port_output(struct ifnet *ifp, struct mbuf *m,
const 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 (ENETDOWN);
}
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_XLOCK(sc);
lp->lp_detaching = 1;
lagg_port_destroy(lp, 1);
LAGG_XUNLOCK(sc);
VLAN_CAPABILITIES(sc->sc_ifp);
}
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;
lagg_proto_portreq(sc, lp, &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_BROADCAST:
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 ifnet *ifp = sc->sc_ifp;
struct lagg_port *lp;
LAGG_XLOCK(sc);
if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
LAGG_XUNLOCK(sc);
return;
}
ifp->if_drv_flags |= IFF_DRV_RUNNING;
/*
* Update the port lladdrs if needed.
* This might be if_setlladdr() notification
* that lladdr has been changed.
*/
CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
if (memcmp(IF_LLADDR(ifp), IF_LLADDR(lp->lp_ifp),
ETHER_ADDR_LEN) != 0)
if_setlladdr(lp->lp_ifp, IF_LLADDR(ifp), ETHER_ADDR_LEN);
}
lagg_proto_init(sc);
LAGG_XUNLOCK(sc);
}
static void
lagg_stop(struct lagg_softc *sc)
{
struct ifnet *ifp = sc->sc_ifp;
LAGG_XLOCK_ASSERT(sc);
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
return;
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
lagg_proto_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_reqopts *ro = (struct lagg_reqopts *)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_XLOCK(sc);
buflen = sc->sc_count * sizeof(struct lagg_reqport);
outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO);
ra->ra_proto = sc->sc_proto;
lagg_proto_request(sc, &ra->ra_psc);
count = 0;
buf = outbuf;
len = min(ra->ra_size, buflen);
CK_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_XUNLOCK(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_XLOCK(sc);
lagg_proto_detach(sc);
LAGG_UNLOCK_ASSERT();
lagg_proto_attach(sc, ra->ra_proto);
LAGG_XUNLOCK(sc);
break;
case SIOCGLAGGOPTS:
LAGG_XLOCK(sc);
ro->ro_opts = sc->sc_opts;
if (sc->sc_proto == LAGG_PROTO_LACP) {
struct lacp_softc *lsc;
lsc = (struct lacp_softc *)sc->sc_psc;
if (lsc->lsc_debug.lsc_tx_test != 0)
ro->ro_opts |= LAGG_OPT_LACP_TXTEST;
if (lsc->lsc_debug.lsc_rx_test != 0)
ro->ro_opts |= LAGG_OPT_LACP_RXTEST;
if (lsc->lsc_strict_mode != 0)
ro->ro_opts |= LAGG_OPT_LACP_STRICT;
if (lsc->lsc_fast_timeout != 0)
ro->ro_opts |= LAGG_OPT_LACP_TIMEOUT;
ro->ro_active = sc->sc_active;
} else {
ro->ro_active = 0;
CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
ro->ro_active += LAGG_PORTACTIVE(lp);
}
ro->ro_bkt = sc->sc_bkt;
ro->ro_flapping = sc->sc_flapping;
ro->ro_flowid_shift = sc->flowid_shift;
LAGG_XUNLOCK(sc);
break;
case SIOCSLAGGOPTS:
if (sc->sc_proto == LAGG_PROTO_ROUNDROBIN) {
if (ro->ro_bkt == 0)
sc->sc_bkt = 1; // Minimum 1 packet per iface.
else
sc->sc_bkt = ro->ro_bkt;
}
error = priv_check(td, PRIV_NET_LAGG);
if (error)
break;
if (ro->ro_opts == 0)
break;
/*
* Set options. LACP options are stored in sc->sc_psc,
* not in sc_opts.
*/
int valid, lacp;
switch (ro->ro_opts) {
case LAGG_OPT_USE_FLOWID:
case -LAGG_OPT_USE_FLOWID:
case LAGG_OPT_FLOWIDSHIFT:
valid = 1;
lacp = 0;
break;
case LAGG_OPT_LACP_TXTEST:
case -LAGG_OPT_LACP_TXTEST:
case LAGG_OPT_LACP_RXTEST:
case -LAGG_OPT_LACP_RXTEST:
case LAGG_OPT_LACP_STRICT:
case -LAGG_OPT_LACP_STRICT:
case LAGG_OPT_LACP_TIMEOUT:
case -LAGG_OPT_LACP_TIMEOUT:
valid = lacp = 1;
break;
default:
valid = lacp = 0;
break;
}
LAGG_XLOCK(sc);
if (valid == 0 ||
(lacp == 1 && sc->sc_proto != LAGG_PROTO_LACP)) {
/* Invalid combination of options specified. */
error = EINVAL;
LAGG_XUNLOCK(sc);
break; /* Return from SIOCSLAGGOPTS. */
}
/*
* Store new options into sc->sc_opts except for
* FLOWIDSHIFT and LACP options.
*/
if (lacp == 0) {
if (ro->ro_opts == LAGG_OPT_FLOWIDSHIFT)
sc->flowid_shift = ro->ro_flowid_shift;
else if (ro->ro_opts > 0)
sc->sc_opts |= ro->ro_opts;
else
sc->sc_opts &= ~ro->ro_opts;
} else {
struct lacp_softc *lsc;
struct lacp_port *lp;
lsc = (struct lacp_softc *)sc->sc_psc;
switch (ro->ro_opts) {
case LAGG_OPT_LACP_TXTEST:
lsc->lsc_debug.lsc_tx_test = 1;
break;
case -LAGG_OPT_LACP_TXTEST:
lsc->lsc_debug.lsc_tx_test = 0;
break;
case LAGG_OPT_LACP_RXTEST:
lsc->lsc_debug.lsc_rx_test = 1;
break;
case -LAGG_OPT_LACP_RXTEST:
lsc->lsc_debug.lsc_rx_test = 0;
break;
case LAGG_OPT_LACP_STRICT:
lsc->lsc_strict_mode = 1;
break;
case -LAGG_OPT_LACP_STRICT:
lsc->lsc_strict_mode = 0;
break;
case LAGG_OPT_LACP_TIMEOUT:
LACP_LOCK(lsc);
LIST_FOREACH(lp, &lsc->lsc_ports, lp_next)
lp->lp_state |= LACP_STATE_TIMEOUT;
LACP_UNLOCK(lsc);
lsc->lsc_fast_timeout = 1;
break;
case -LAGG_OPT_LACP_TIMEOUT:
LACP_LOCK(lsc);
LIST_FOREACH(lp, &lsc->lsc_ports, lp_next)
lp->lp_state &= ~LACP_STATE_TIMEOUT;
LACP_UNLOCK(lsc);
lsc->lsc_fast_timeout = 0;
break;
}
}
LAGG_XUNLOCK(sc);
break;
case SIOCGLAGGFLAGS:
rf->rf_flags = 0;
LAGG_XLOCK(sc);
if (sc->sc_flags & MBUF_HASHFLAG_L2)
rf->rf_flags |= LAGG_F_HASHL2;
if (sc->sc_flags & MBUF_HASHFLAG_L3)
rf->rf_flags |= LAGG_F_HASHL3;
if (sc->sc_flags & MBUF_HASHFLAG_L4)
rf->rf_flags |= LAGG_F_HASHL4;
LAGG_XUNLOCK(sc);
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_XLOCK(sc);
sc->sc_flags = 0;
if (rf->rf_flags & LAGG_F_HASHL2)
sc->sc_flags |= MBUF_HASHFLAG_L2;
if (rf->rf_flags & LAGG_F_HASHL3)
sc->sc_flags |= MBUF_HASHFLAG_L3;
if (rf->rf_flags & LAGG_F_HASHL4)
sc->sc_flags |= MBUF_HASHFLAG_L4;
LAGG_XUNLOCK(sc);
break;
case SIOCGLAGGPORT:
if (rp->rp_portname[0] == '\0' ||
(tpif = ifunit_ref(rp->rp_portname)) == NULL) {
error = EINVAL;
break;
}
LAGG_RLOCK();
if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL ||
lp->lp_softc != sc) {
error = ENOENT;
LAGG_RUNLOCK();
if_rele(tpif);
break;
}
lagg_port2req(lp, rp);
LAGG_RUNLOCK();
if_rele(tpif);
break;
case SIOCSLAGGPORT:
error = priv_check(td, PRIV_NET_LAGG);
if (error)
break;
if (rp->rp_portname[0] == '\0' ||
(tpif = ifunit_ref(rp->rp_portname)) == NULL) {
error = EINVAL;
break;
}
#ifdef INET6
/*
* A laggport interface should not have inet6 address
* because two interfaces with a valid link-local
* scope zone must not be merged in any form. This
* restriction is needed to prevent violation of
* link-local scope zone. Attempts to add a laggport
* interface which has inet6 addresses triggers
* removal of all inet6 addresses on the member
* interface.
*/
if (in6ifa_llaonifp(tpif)) {
in6_ifdetach(tpif);
if_printf(sc->sc_ifp,
"IPv6 addresses on %s have been removed "
"before adding it as a member to prevent "
"IPv6 address scope violation.\n",
tpif->if_xname);
}
#endif
LAGG_XLOCK(sc);
error = lagg_port_create(sc, tpif);
LAGG_XUNLOCK(sc);
if_rele(tpif);
VLAN_CAPABILITIES(ifp);
break;
case SIOCSLAGGDELPORT:
error = priv_check(td, PRIV_NET_LAGG);
if (error)
break;
if (rp->rp_portname[0] == '\0' ||
(tpif = ifunit_ref(rp->rp_portname)) == NULL) {
error = EINVAL;
break;
}
LAGG_XLOCK(sc);
if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL ||
lp->lp_softc != sc) {
error = ENOENT;
LAGG_XUNLOCK(sc);
if_rele(tpif);
break;
}
error = lagg_port_destroy(lp, 1);
LAGG_XUNLOCK(sc);
if_rele(tpif);
VLAN_CAPABILITIES(ifp);
break;
case SIOCSIFFLAGS:
/* Set flags on ports too */
LAGG_XLOCK(sc);
CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
lagg_setflags(lp, 1);
}
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_stop(sc);
LAGG_XUNLOCK(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.
*/
LAGG_XUNLOCK(sc);
(*ifp->if_init)(sc);
} else
LAGG_XUNLOCK(sc);
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
LAGG_XLOCK(sc);
CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
lagg_clrmulti(lp);
lagg_setmulti(lp);
}
LAGG_XUNLOCK(sc);
error = 0;
break;
case SIOCSIFMEDIA:
case SIOCGIFMEDIA:
error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd);
break;
case SIOCSIFCAP:
LAGG_XLOCK(sc);
CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
if (lp->lp_ioctl != NULL)
(*lp->lp_ioctl)(lp->lp_ifp, cmd, data);
}
lagg_capabilities(sc);
LAGG_XUNLOCK(sc);
VLAN_CAPABILITIES(ifp);
error = 0;
break;
case SIOCSIFMTU:
LAGG_XLOCK(sc);
CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
if (lp->lp_ioctl != NULL)
error = (*lp->lp_ioctl)(lp->lp_ifp, cmd, data);
else
error = EINVAL;
if (error != 0) {
if_printf(ifp,
"failed to change MTU to %d on port %s, "
"reverting all ports to original MTU (%d)\n",
ifr->ifr_mtu, lp->lp_ifp->if_xname, ifp->if_mtu);
break;
}
}
if (error == 0) {
ifp->if_mtu = ifr->ifr_mtu;
} else {
/* set every port back to the original MTU */
ifr->ifr_mtu = ifp->if_mtu;
CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
if (lp->lp_ioctl != NULL)
(*lp->lp_ioctl)(lp->lp_ifp, cmd, data);
}
}
LAGG_XUNLOCK(sc);
break;
default:
error = ether_ioctl(ifp, cmd, data);
break;
}
return (error);
}
#ifdef RATELIMIT
static int
lagg_snd_tag_alloc(struct ifnet *ifp,
union if_snd_tag_alloc_params *params,
struct m_snd_tag **ppmt)
{
struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
struct lagg_port *lp;
struct lagg_lb *lb;
uint32_t p;
LAGG_RLOCK();
switch (sc->sc_proto) {
case LAGG_PROTO_FAILOVER:
lp = lagg_link_active(sc, sc->sc_primary);
break;
case LAGG_PROTO_LOADBALANCE:
if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 ||
params->hdr.flowtype == M_HASHTYPE_NONE) {
LAGG_RUNLOCK();
return (EOPNOTSUPP);
}
p = params->hdr.flowid >> sc->flowid_shift;
p %= sc->sc_count;
lb = (struct lagg_lb *)sc->sc_psc;
lp = lb->lb_ports[p];
lp = lagg_link_active(sc, lp);
break;
case LAGG_PROTO_LACP:
if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 ||
params->hdr.flowtype == M_HASHTYPE_NONE) {
LAGG_RUNLOCK();
return (EOPNOTSUPP);
}
lp = lacp_select_tx_port_by_hash(sc, params->hdr.flowid);
break;
default:
LAGG_RUNLOCK();
return (EOPNOTSUPP);
}
if (lp == NULL) {
LAGG_RUNLOCK();
return (EOPNOTSUPP);
}
ifp = lp->lp_ifp;
LAGG_RUNLOCK();
if (ifp == NULL || ifp->if_snd_tag_alloc == NULL ||
(ifp->if_capenable & IFCAP_TXRTLMT) == 0)
return (EOPNOTSUPP);
/* forward allocation request */
return (ifp->if_snd_tag_alloc(ifp, params, ppmt));
}
static void
lagg_snd_tag_free(struct m_snd_tag *tag)
{
tag->ifp->if_snd_tag_free(tag);
}
#endif
static int
lagg_setmulti(struct lagg_port *lp)
{
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;
int error;
IF_ADDR_WLOCK(scifp);
CK_STAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) {
if (ifma->ifma_addr->sa_family != AF_LINK)
continue;
mc = malloc(sizeof(struct lagg_mc), M_LAGG, M_NOWAIT);
if (mc == NULL) {
IF_ADDR_WUNLOCK(scifp);
return (ENOMEM);
}
bcopy(ifma->ifma_addr, &mc->mc_addr,
ifma->ifma_addr->sa_len);
mc->mc_addr.sdl_index = ifp->if_index;
mc->mc_ifma = NULL;
SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries);
}
IF_ADDR_WUNLOCK(scifp);
SLIST_FOREACH (mc, &lp->lp_mc_head, mc_entries) {
error = if_addmulti(ifp,
(struct sockaddr *)&mc->mc_addr, &mc->mc_ifma);
if (error)
return (error);
}
return (0);
}
static int
lagg_clrmulti(struct lagg_port *lp)
{
struct lagg_mc *mc;
LAGG_XLOCK_ASSERT(lp->lp_softc);
while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) {
SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries);
if (mc->mc_ifma && lp->lp_detaching == 0)
if_delmulti_ifma(mc->mc_ifma);
free(mc, M_LAGG);
}
return (0);
}
static int
lagg_setcaps(struct lagg_port *lp, int cap)
{
struct ifreq ifr;
if (lp->lp_ifp->if_capenable == cap)
return (0);
if (lp->lp_ioctl == NULL)
return (ENXIO);
ifr.ifr_reqcap = cap;
return ((*lp->lp_ioctl)(lp->lp_ifp, SIOCSIFCAP, (caddr_t)&ifr));
}
/* 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_XLOCK_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;
LAGG_RLOCK();
/* We need a Tx algorithm and at least one port */
if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) {
LAGG_RUNLOCK();
m_freem(m);
if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
return (ENXIO);
}
ETHER_BPF_MTAP(ifp, m);
error = lagg_proto_start(sc, m);
LAGG_RUNLOCK();
if (error != 0)
if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
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();
if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ||
lp->lp_detaching != 0 ||
sc->sc_proto == LAGG_PROTO_NONE) {
LAGG_RUNLOCK();
m_freem(m);
return (NULL);
}
ETHER_BPF_MTAP(scifp, m);
m = lagg_proto_input(sc, lp, m);
if (m != NULL && (scifp->if_flags & IFF_MONITOR) != 0) {
m_freem(m);
m = NULL;
}
LAGG_RUNLOCK();
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();
CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
if (LAGG_PORTACTIVE(lp))
imr->ifm_status |= IFM_ACTIVE;
}
LAGG_RUNLOCK();
}
static void
lagg_linkstate(struct lagg_softc *sc)
{
struct lagg_port *lp;
int new_link = LINK_STATE_DOWN;
uint64_t speed;
LAGG_XLOCK_ASSERT(sc);
/* LACP handles link state itself */
if (sc->sc_proto == LAGG_PROTO_LACP)
return;
/* Our link is considered up if at least one of our ports is active */
LAGG_RLOCK();
CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
if (lp->lp_ifp->if_link_state == LINK_STATE_UP) {
new_link = LINK_STATE_UP;
break;
}
}
LAGG_RUNLOCK();
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_BROADCAST:
speed = 0;
LAGG_RLOCK();
CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
speed += lp->lp_ifp->if_baudrate;
LAGG_RUNLOCK();
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_XLOCK(sc);
lagg_linkstate(sc);
lagg_proto_linkstate(sc, lp);
LAGG_XUNLOCK(sc);
}
struct lagg_port *
lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp)
{
struct lagg_port *lp_next, *rval = NULL;
/*
* Search a port which reports an active link state.
*/
/*
* This is called with either LAGG_RLOCK() held or
* LAGG_XLOCK(sc) held.
*/
if (!in_epoch(net_epoch_preempt))
LAGG_XLOCK_ASSERT(sc);
if (lp == NULL)
goto search;
if (LAGG_PORTACTIVE(lp)) {
rval = lp;
goto found;
}
if ((lp_next = CK_SLIST_NEXT(lp, lp_entries)) != NULL &&
LAGG_PORTACTIVE(lp_next)) {
rval = lp_next;
goto found;
}
search:
CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) {
if (LAGG_PORTACTIVE(lp_next)) {
return (lp_next);
}
}
found:
return (rval);
}
int
lagg_enqueue(struct ifnet *ifp, struct mbuf *m)
{
return (ifp->if_transmit)(ifp, m);
}
/*
* Simple round robin aggregation
*/
static void
lagg_rr_attach(struct lagg_softc *sc)
{
sc->sc_seq = 0;
sc->sc_bkt_count = sc->sc_bkt;
}
static int
lagg_rr_start(struct lagg_softc *sc, struct mbuf *m)
{
struct lagg_port *lp;
uint32_t p;
if (sc->sc_bkt_count == 0 && sc->sc_bkt > 0)
sc->sc_bkt_count = sc->sc_bkt;
if (sc->sc_bkt > 0) {
atomic_subtract_int(&sc->sc_bkt_count, 1);
if (atomic_cmpset_int(&sc->sc_bkt_count, 0, sc->sc_bkt))
p = atomic_fetchadd_32(&sc->sc_seq, 1);
else
p = sc->sc_seq;
} else
p = atomic_fetchadd_32(&sc->sc_seq, 1);
p %= sc->sc_count;
lp = CK_SLIST_FIRST(&sc->sc_ports);
while (p--)
lp = CK_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 (ENETDOWN);
}
/* 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);
}
/*
* Broadcast mode
*/
static int
lagg_bcast_start(struct lagg_softc *sc, struct mbuf *m)
{
int active_ports = 0;
int errors = 0;
int ret;
struct lagg_port *lp, *last = NULL;
struct mbuf *m0;
LAGG_RLOCK_ASSERT();
CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
if (!LAGG_PORTACTIVE(lp))
continue;
active_ports++;
if (last != NULL) {
m0 = m_copym(m, 0, M_COPYALL, M_NOWAIT);
if (m0 == NULL) {
ret = ENOBUFS;
errors++;
break;
}
ret = lagg_enqueue(last->lp_ifp, m0);
if (ret != 0)
errors++;
}
last = lp;
}
if (last == NULL) {
m_freem(m);
return (ENOENT);
}
if ((last = lagg_link_active(sc, last)) == NULL) {
m_freem(m);
return (ENETDOWN);
}
ret = lagg_enqueue(last->lp_ifp, m);
if (ret != 0)
errors++;
if (errors == 0)
return (ret);
return (0);
}
static struct mbuf*
lagg_bcast_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_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 (ENETDOWN);
}
/* 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 || V_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 received 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 void
lagg_lb_attach(struct lagg_softc *sc)
{
struct lagg_port *lp;
struct lagg_lb *lb;
LAGG_XLOCK_ASSERT(sc);
lb = malloc(sizeof(struct lagg_lb), M_LAGG, M_WAITOK | M_ZERO);
lb->lb_key = m_ether_tcpip_hash_init();
sc->sc_psc = lb;
CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
lagg_lb_port_create(lp);
}
static void
lagg_lb_detach(struct lagg_softc *sc)
{
struct lagg_lb *lb;
lb = (struct lagg_lb *)sc->sc_psc;
if (lb != NULL)
free(lb, M_LAGG);
}
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, rv;
rv = 0;
bzero(&lb->lb_ports, sizeof(lb->lb_ports));
LAGG_XLOCK_ASSERT(sc);
CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) {
if (lp_next == lp)
continue;
if (i >= LAGG_MAX_PORTS) {
rv = EINVAL;
break;
}
if (sc->sc_ifflags & IFF_DEBUG)
printf("%s: port %s at index %d\n",
sc->sc_ifname, lp_next->lp_ifp->if_xname, i);
lb->lb_ports[i++] = lp_next;
}
return (rv);
}
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->sc_opts & LAGG_OPT_USE_FLOWID) &&
M_HASHTYPE_GET(m) != M_HASHTYPE_NONE)
p = m->m_pkthdr.flowid >> sc->flowid_shift;
else
p = m_ether_tcpip_hash(sc->sc_flags, 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 (ENETDOWN);
}
/* 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 void
lagg_lacp_attach(struct lagg_softc *sc)
{
struct lagg_port *lp;
lacp_attach(sc);
LAGG_XLOCK_ASSERT(sc);
CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
lacp_port_create(lp);
}
static void
lagg_lacp_detach(struct lagg_softc *sc)
{
struct lagg_port *lp;
void *psc;
LAGG_XLOCK_ASSERT(sc);
CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
lacp_port_destroy(lp);
psc = sc->sc_psc;
sc->sc_psc = NULL;
lacp_detach(psc);
}
static void
lagg_lacp_lladdr(struct lagg_softc *sc)
{
struct lagg_port *lp;
LAGG_SXLOCK_ASSERT(sc);
/* purge all the lacp ports */
CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
lacp_port_destroy(lp);
/* add them back in */
CK_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 (ENETDOWN);
}
/* 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);
}
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