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Add linkstate to bridge(4), set the link to up when at least one underlying

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interface is up, otherwise the link is down.

This, among other things, allows carp to work on a bridge.

Prodded by:	glebius
Tested by:	Alexander Lunev
This commit is contained in:
Andrew Thompson 2012-04-20 09:55:50 +00:00
parent b50d8083ab
commit 7702d4013b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=234487
4 changed files with 60 additions and 35 deletions
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28
sys/net/bridgestp.c
View File

@ -1767,28 +1767,16 @@ bstp_notify_rtage(void *arg, int pending)
}
void
bstp_linkstate(struct ifnet *ifp, int state)
bstp_linkstate(struct bstp_port *bp)
{
struct bstp_state *bs;
struct bstp_port *bp;
struct bstp_state *bs = bp->bp_bs;
/* search for the stp port */
mtx_lock(&bstp_list_mtx);
LIST_FOREACH(bs, &bstp_list, bs_list) {
BSTP_LOCK(bs);
LIST_FOREACH(bp, &bs->bs_bplist, bp_next) {
if (bp->bp_ifp == ifp) {
bstp_ifupdstatus(bs, bp);
bstp_update_state(bs, bp);
/* it only exists once so return */
BSTP_UNLOCK(bs);
mtx_unlock(&bstp_list_mtx);
return;
}
}
BSTP_UNLOCK(bs);
BSTP_LOCK(bs);
if (bp->bp_active) {
bstp_ifupdstatus(bs, bp);
bstp_update_state(bs, bp);
}
mtx_unlock(&bstp_list_mtx);
BSTP_UNLOCK(bs);
}
static void
@ -2103,10 +2091,8 @@ bstp_modevent(module_t mod, int type, void *data)
case MOD_LOAD:
mtx_init(&bstp_list_mtx, "bridgestp list", NULL, MTX_DEF);
LIST_INIT(&bstp_list);
bstp_linkstate_p = bstp_linkstate;
break;
case MOD_UNLOAD:
bstp_linkstate_p = NULL;
mtx_destroy(&bstp_list_mtx);
break;
default:

4
sys/net/bridgestp.h
View File

@ -369,8 +369,6 @@ struct bstp_state {
extern const uint8_t bstp_etheraddr[];
extern void (*bstp_linkstate_p)(struct ifnet *ifp, int state);
void bstp_attach(struct bstp_state *, struct bstp_cb_ops *);
void bstp_detach(struct bstp_state *);
void bstp_init(struct bstp_state *);
@ -379,7 +377,7 @@ int bstp_create(struct bstp_state *, struct bstp_port *, struct ifnet *);
int bstp_enable(struct bstp_port *);
void bstp_disable(struct bstp_port *);
void bstp_destroy(struct bstp_port *);
void bstp_linkstate(struct ifnet *, int);
void bstp_linkstate(struct bstp_port *);
int bstp_set_htime(struct bstp_state *, int);
int bstp_set_fdelay(struct bstp_state *, int);
int bstp_set_maxage(struct bstp_state *, int);

4
sys/net/if.c
View File

@ -124,7 +124,7 @@ static MALLOC_DEFINE(M_IFDESCR, "ifdescr", "ifnet descriptions");
static struct sx ifdescr_sx;
SX_SYSINIT(ifdescr_sx, &ifdescr_sx, "ifnet descr");
void (*bstp_linkstate_p)(struct ifnet *ifp, int state);
void (*bridge_linkstate_p)(struct ifnet *ifp);
void (*ng_ether_link_state_p)(struct ifnet *ifp, int state);
void (*lagg_linkstate_p)(struct ifnet *ifp, int state);
/* These are external hooks for CARP. */
@ -1910,7 +1910,7 @@ do_link_state_change(void *arg, int pending)
if (ifp->if_carp)
(*carp_linkstate_p)(ifp);
if (ifp->if_bridge)
(*bstp_linkstate_p)(ifp, link_state);
(*bridge_linkstate_p)(ifp);
if (ifp->if_lagg)
(*lagg_linkstate_p)(ifp, link_state);

59
sys/net/if_bridge.c
View File

@ -333,6 +333,9 @@ static int bridge_ip6_checkbasic(struct mbuf **mp);
#endif /* INET6 */
static int bridge_fragment(struct ifnet *, struct mbuf *,
struct ether_header *, int, struct llc *);
static void bridge_linkstate(struct ifnet *ifp);
extern void (*bridge_linkstate_p)(struct ifnet *ifp);
/* The default bridge vlan is 1 (IEEE 802.1Q-2003 Table 9-2) */
#define VLANTAGOF(_m) \
@ -496,6 +499,7 @@ bridge_modevent(module_t mod, int type, void *data)
bridge_input_p = bridge_input;
bridge_output_p = bridge_output;
bridge_dn_p = bridge_dummynet;
bridge_linkstate_p = bridge_linkstate;
bridge_detach_cookie = EVENTHANDLER_REGISTER(
ifnet_departure_event, bridge_ifdetach, NULL,
EVENTHANDLER_PRI_ANY);
@ -508,6 +512,7 @@ bridge_modevent(module_t mod, int type, void *data)
bridge_input_p = NULL;
bridge_output_p = NULL;
bridge_dn_p = NULL;
bridge_linkstate_p = NULL;
mtx_destroy(&bridge_list_mtx);
break;
default:
@ -988,6 +993,7 @@ bridge_delete_member(struct bridge_softc *sc, struct bridge_iflist *bif,
bridge_set_ifcap(sc, bif, bif->bif_savedcaps);
}
bstp_destroy(&bif->bif_stp); /* prepare to free */
bridge_linkstate(ifs);
BRIDGE_LOCK(sc);
free(bif, M_DEVBUF);
}
@ -1087,17 +1093,17 @@ bridge_ioctl_add(struct bridge_softc *sc, void *arg)
/* Set interface capabilities to the intersection set of all members */
bridge_mutecaps(sc);
BRIDGE_UNLOCK(sc);
/* Update the linkstate for the bridge */
bridge_linkstate(ifs);
/* Place the interface into promiscuous mode */
switch (ifs->if_type) {
case IFT_ETHER:
case IFT_L2VLAN:
/*
* Place the interface into promiscuous mode.
*/
BRIDGE_UNLOCK(sc);
error = ifpromisc(ifs, 1);
BRIDGE_LOCK(sc);
break;
case IFT_ETHER:
case IFT_L2VLAN:
error = ifpromisc(ifs, 1);
break;
}
BRIDGE_LOCK(sc);
if (error)
bridge_delete_member(sc, bif, 0);
out:
@ -3475,3 +3481,38 @@ bridge_fragment(struct ifnet *ifp, struct mbuf *m, struct ether_header *eh,
m_freem(m);
return (error);
}
static void
bridge_linkstate(struct ifnet *ifp)
{
struct bridge_softc *sc = ifp->if_bridge;
struct bridge_iflist *bif, *bif2;
int new_link, hasls;
BRIDGE_LOCK(sc);
bif = bridge_lookup_member_if(sc, ifp);
if (bif == NULL) {
BRIDGE_UNLOCK(sc);
return;
}
new_link = LINK_STATE_DOWN;
hasls = 0;
/* Our link is considered up if at least one of our ports is active */
LIST_FOREACH(bif2, &sc->sc_iflist, bif_next) {
if (bif2->bif_ifp->if_capabilities & IFCAP_LINKSTATE)
hasls++;
if (bif2->bif_ifp->if_link_state == LINK_STATE_UP) {
new_link = LINK_STATE_UP;
break;
}
}
if (!LIST_EMPTY(&sc->sc_iflist) && !hasls) {
/* If no interfaces support link-state then we default to up */
new_link = LINK_STATE_UP;
}
if_link_state_change(sc->sc_ifp, new_link);
BRIDGE_UNLOCK(sc);
bstp_linkstate(&bif->bif_stp);
}