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MFp4

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- Each stp port is added sequentially so it was possible for our bridgeid to
   change every time because the new port has a lower MAC address.  Instead
   just find the lowest MAC address from all Ethernet adapters in the machine
   as the value only needs to be unique, this stops a lot of churn on the
   protocol.
 - Update the states after enabling or disabling a port.
 - Keep tabs if we have been stopped or started by our parent bridge.
 - The callout only needs to be drained before destroying the mutex, move it to
   bstp_detach.
This commit is contained in:
Andrew Thompson 2006-11-09 22:50:49 +00:00
parent ee03a332df
commit c25789cc22
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=164141
2 changed files with 47 additions and 23 deletions
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69
sys/net/bridgestp.c
View File

@ -151,6 +151,9 @@ static void bstp_stop_locked(struct bstp_state *);
static void
bstp_transmit(struct bstp_state *bs, struct bstp_port *bp)
{
if (bs->bs_running == 0)
return;
/*
* a PDU can only be sent if we have tx quota left and the
* hello timer is running.
@ -1745,6 +1748,7 @@ bstp_linkstate(struct ifnet *ifp, int state)
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);
@ -1809,6 +1813,9 @@ bstp_tick(void *arg)
BSTP_LOCK_ASSERT(bs);
if (bs->bs_running == 0)
return;
/* slow timer to catch missed link events */
if (bstp_timer_expired(&bs->bs_link_timer)) {
LIST_FOREACH(bp, &bs->bs_bplist, bp_next)
@ -1915,8 +1922,10 @@ bstp_edge_delay_expiry(struct bstp_state *bs, struct bstp_port *bp)
{
if ((bp->bp_flags & BSTP_PORT_AUTOEDGE) &&
bp->bp_protover == BSTP_PROTO_RSTP && bp->bp_proposing &&
bp->bp_role == BSTP_ROLE_DESIGNATED)
bp->bp_role == BSTP_ROLE_DESIGNATED) {
bp->bp_operedge = 1;
DPRINTF("%s -> edge port\n", bp->bp_ifp->if_xname);
}
}
static int
@ -1952,32 +1961,42 @@ bstp_same_bridgeid(uint64_t id1, uint64_t id2)
void
bstp_reinit(struct bstp_state *bs)
{
struct bstp_port *bp, *mbp;
struct bstp_port *bp;
struct ifnet *ifp, *mif;
u_char *e_addr;
BSTP_LOCK_ASSERT(bs);
mbp = NULL;
LIST_FOREACH(bp, &bs->bs_bplist, bp_next) {
bp->bp_port_id = (bp->bp_priority << 8) |
(bp->bp_ifp->if_index & 0xfff);
if (mbp == NULL) {
mbp = bp;
continue;
}
if (bstp_addr_cmp(IF_LLADDR(bp->bp_ifp),
IF_LLADDR(mbp->bp_ifp)) < 0) {
mbp = bp;
continue;
}
}
if (mbp == NULL) {
if (LIST_EMPTY(&bs->bs_bplist)) {
bstp_stop_locked(bs);
return;
}
e_addr = IF_LLADDR(mbp->bp_ifp);
mif = NULL;
/*
* Search through the Ethernet adapters and find the one with the
* lowest value. The adapter which we take the MAC address from does
* not need to be part of the bridge, it just needs to be a unique
* value. It is not possible for mif to be null, at this point we have
* at least one stp port and hence at least one NIC.
*/
IFNET_RLOCK();
TAILQ_FOREACH(ifp, &ifnet, if_link) {
if (ifp->if_type != IFT_ETHER)
continue;
if (mif == NULL) {
mif = ifp;
continue;
}
if (bstp_addr_cmp(IF_LLADDR(ifp), IF_LLADDR(mif)) < 0) {
mif = ifp;
continue;
}
}
IFNET_RUNLOCK();
e_addr = IF_LLADDR(mif);
bs->bs_bridge_pv.pv_dbridge_id =
(((uint64_t)bs->bs_bridge_priority) << 48) |
(((uint64_t)e_addr[0]) << 40) |
@ -1992,13 +2011,15 @@ bstp_reinit(struct bstp_state *bs)
bs->bs_bridge_pv.pv_dport_id = 0;
bs->bs_bridge_pv.pv_port_id = 0;
if (callout_pending(&bs->bs_bstpcallout) == 0)
if (bs->bs_running && callout_pending(&bs->bs_bstpcallout) == 0)
callout_reset(&bs->bs_bstpcallout, hz, bstp_tick, bs);
LIST_FOREACH(bp, &bs->bs_bplist, bp_next)
LIST_FOREACH(bp, &bs->bs_bplist, bp_next) {
bp->bp_port_id = (bp->bp_priority << 8) |
(bp->bp_ifp->if_index & 0xfff);
bstp_ifupdstatus(bs, bp);
}
getmicrotime(&bs->bs_last_tc_time);
bstp_assign_roles(bs);
bstp_timer_start(&bs->bs_link_timer, BSTP_LINK_TIMER);
}
@ -2064,6 +2085,7 @@ bstp_detach(struct bstp_state *bs)
mtx_lock(&bstp_list_mtx);
LIST_REMOVE(bs, bs_list);
mtx_unlock(&bstp_list_mtx);
callout_drain(&bs->bs_bstpcallout);
BSTP_LOCK_DESTROY(bs);
}
@ -2072,6 +2094,7 @@ bstp_init(struct bstp_state *bs)
{
BSTP_LOCK(bs);
callout_reset(&bs->bs_bstpcallout, hz, bstp_tick, bs);
bs->bs_running = 1;
bstp_reinit(bs);
BSTP_UNLOCK(bs);
}
@ -2094,7 +2117,7 @@ bstp_stop_locked(struct bstp_state *bs)
LIST_FOREACH(bp, &bs->bs_bplist, bp_next)
bstp_set_port_state(bp, BSTP_IFSTATE_DISCARDING);
callout_drain(&bs->bs_bstpcallout);
bs->bs_running = 0;
callout_stop(&bs->bs_bstpcallout);
}

1
sys/net/bridgestp.h
View File

@ -326,6 +326,7 @@ struct bstp_port {
*/
struct bstp_state {
LIST_ENTRY(bstp_state) bs_list;
uint8_t bs_running;
struct mtx bs_mtx;
struct bstp_pri_vector bs_bridge_pv;
struct bstp_pri_vector bs_root_pv;