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Let epair(4) virtual interfaces report fake link / media status,

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by borrowing the skeleton of if_media manipulation and reporting
code from if_lagg(4).  The main motivation behind this change is
to allow for epair(4) interfaces to participate in STP if_bridge(4)
configurations.

Reviewed by:	bz
MFC after:	3 days
This commit is contained in:
Marko Zec 2011-05-24 07:57:28 +00:00
parent 71737f5a06
commit 2dccdd4562
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=222246
1 changed files with 37 additions and 0 deletions
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37
sys/net/if_epair.c
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@ -66,6 +66,7 @@ __FBSDID("$FreeBSD$");
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_clone.h>
#include <net/if_media.h>
#include <net/if_var.h>
#include <net/if_types.h>
#include <net/netisr.h>
@ -92,6 +93,8 @@ static struct mbuf *epair_nh_m2cpuid(struct mbuf *, uintptr_t, u_int *);
static void epair_nh_drainedcpu(u_int);
static void epair_start_locked(struct ifnet *);
static int epair_media_change(struct ifnet *);
static void epair_media_status(struct ifnet *, struct ifmediareq *);
static int epair_clone_match(struct if_clone *, const char *);
static int epair_clone_create(struct if_clone *, char *, size_t, caddr_t);
@ -127,6 +130,7 @@ SYSCTL_PROC(_net_link_epair, OID_AUTO, netisr_maxqlen, CTLTYPE_INT|CTLFLAG_RW,
struct epair_softc {
struct ifnet *ifp; /* This ifp. */
struct ifnet *oifp; /* other ifp of pair. */
struct ifmedia media; /* Media config (fake). */
u_int refcount; /* # of mbufs in flight. */
u_int cpuid; /* CPU ID assigned upon creation. */
void (*if_qflush)(struct ifnet *);
@ -610,9 +614,26 @@ epair_qflush(struct ifnet *ifp)
sc->if_qflush(ifp);
}
static int
epair_media_change(struct ifnet *ifp __unused)
{
/* Do nothing. */
return (0);
}
static void
epair_media_status(struct ifnet *ifp __unused, struct ifmediareq *imr)
{
imr->ifm_status = IFM_AVALID | IFM_ACTIVE;
imr->ifm_active = IFM_ETHER | IFM_10G_T | IFM_FDX;
}
static int
epair_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
{
struct epair_softc *sc;
struct ifreq *ifr;
int error;
@ -624,6 +645,12 @@ epair_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
error = 0;
break;
case SIOCSIFMEDIA:
case SIOCGIFMEDIA:
sc = ifp->if_softc;
error = ifmedia_ioctl(ifp, ifr, &sc->media, cmd);
break;
case SIOCSIFMTU:
/* We basically allow all kinds of MTUs. */
ifp->if_mtu = ifr->ifr_mtu;
@ -829,6 +856,14 @@ epair_clone_create(struct if_clone *ifc, char *name, size_t len, caddr_t params)
strlcpy(name, sca->ifp->if_xname, len);
DPRINTF("name='%s/%db' created sca=%p scb=%p\n", name, unit, sca, scb);
/* Initialise pseudo media types. */
ifmedia_init(&sca->media, 0, epair_media_change, epair_media_status);
ifmedia_add(&sca->media, IFM_ETHER | IFM_10G_T, 0, NULL);
ifmedia_set(&sca->media, IFM_ETHER | IFM_10G_T);
ifmedia_init(&scb->media, 0, epair_media_change, epair_media_status);
ifmedia_add(&scb->media, IFM_ETHER | IFM_10G_T, 0, NULL);
ifmedia_set(&scb->media, IFM_ETHER | IFM_10G_T);
/* Tell the world, that we are ready to rock. */
sca->ifp->if_drv_flags |= IFF_DRV_RUNNING;
scb->ifp->if_drv_flags |= IFF_DRV_RUNNING;
@ -895,6 +930,8 @@ epair_clone_destroy(struct if_clone *ifc, struct ifnet *ifp)
if_free(oifp);
CURVNET_RESTORE();
if_free(ifp);
ifmedia_removeall(&sca->media);
ifmedia_removeall(&scb->media);
free(scb, M_EPAIR);
free(sca, M_EPAIR);
ifc_free_unit(ifc, unit);