Date: Sat, 26 May 2012 07:58:58 +0000 (UTC) From: Andrew Thompson <thompsa@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-8@freebsd.org Subject: svn commit: r236056 - stable/8/sys/net Message-ID: <201205260758.q4Q7wwUo060890@svn.freebsd.org>
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Author: thompsa Date: Sat May 26 07:58:58 2012 New Revision: 236056 URL: http://svn.freebsd.org/changeset/base/236056 Log: MFC r232118 Only look for a usable MAC address for the bridge ID from ports within our bridge, this allows us to have more than one independent bridge in the same STP domain. PR: kern/164369 Submitted by: Nikos Vassiliadis (earlier version) Modified: stable/8/sys/net/bridgestp.c Directory Properties: stable/8/sys/ (props changed) stable/8/sys/amd64/include/xen/ (props changed) stable/8/sys/boot/ (props changed) stable/8/sys/cddl/contrib/opensolaris/ (props changed) stable/8/sys/contrib/dev/acpica/ (props changed) stable/8/sys/contrib/pf/ (props changed) stable/8/sys/dev/e1000/ (props changed) Modified: stable/8/sys/net/bridgestp.c ============================================================================== --- stable/8/sys/net/bridgestp.c Sat May 26 07:58:12 2012 (r236055) +++ stable/8/sys/net/bridgestp.c Sat May 26 07:58:58 2012 (r236056) @@ -2013,24 +2013,33 @@ bstp_reinit(struct bstp_state *bs) struct bstp_port *bp; struct ifnet *ifp, *mif; u_char *e_addr; + void *bridgeptr; static const u_char llzero[ETHER_ADDR_LEN]; /* 00:00:00:00:00:00 */ BSTP_LOCK_ASSERT(bs); + if (LIST_EMPTY(&bs->bs_bplist)) + goto disablestp; + mif = NULL; + bridgeptr = LIST_FIRST(&bs->bs_bplist)->bp_ifp->if_bridge; + KASSERT(bridgeptr != NULL, ("Invalid bridge pointer")); /* * 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. + * lowest value. Make sure the adapter which we take the MAC address + * from is part of this bridge, so we can have more than one independent + * bridges in the same STP domain. */ IFNET_RLOCK_NOSLEEP(); TAILQ_FOREACH(ifp, &V_ifnet, if_link) { if (ifp->if_type != IFT_ETHER) - continue; + continue; /* Not Ethernet */ + + if (ifp->if_bridge != bridgeptr) + continue; /* Not part of our bridge */ if (bstp_addr_cmp(IF_LLADDR(ifp), llzero) == 0) - continue; + continue; /* No mac address set */ if (mif == NULL) { mif = ifp; @@ -2042,21 +2051,8 @@ bstp_reinit(struct bstp_state *bs) } } IFNET_RUNLOCK_NOSLEEP(); - - if (LIST_EMPTY(&bs->bs_bplist) || mif == NULL) { - /* Set the bridge and root id (lower bits) to zero */ - bs->bs_bridge_pv.pv_dbridge_id = - ((uint64_t)bs->bs_bridge_priority) << 48; - bs->bs_bridge_pv.pv_root_id = bs->bs_bridge_pv.pv_dbridge_id; - bs->bs_root_pv = bs->bs_bridge_pv; - /* Disable any remaining ports, they will have no MAC address */ - LIST_FOREACH(bp, &bs->bs_bplist, bp_next) { - bp->bp_infois = BSTP_INFO_DISABLED; - bstp_set_port_role(bp, BSTP_ROLE_DISABLED); - } - callout_stop(&bs->bs_bstpcallout); - return; - } + if (mif == NULL) + goto disablestp; e_addr = IF_LLADDR(mif); bs->bs_bridge_pv.pv_dbridge_id = @@ -2084,6 +2080,20 @@ bstp_reinit(struct bstp_state *bs) bstp_assign_roles(bs); bstp_timer_start(&bs->bs_link_timer, BSTP_LINK_TIMER); + return; + +disablestp: + /* Set the bridge and root id (lower bits) to zero */ + bs->bs_bridge_pv.pv_dbridge_id = + ((uint64_t)bs->bs_bridge_priority) << 48; + bs->bs_bridge_pv.pv_root_id = bs->bs_bridge_pv.pv_dbridge_id; + bs->bs_root_pv = bs->bs_bridge_pv; + /* Disable any remaining ports, they will have no MAC address */ + LIST_FOREACH(bp, &bs->bs_bplist, bp_next) { + bp->bp_infois = BSTP_INFO_DISABLED; + bstp_set_port_role(bp, BSTP_ROLE_DISABLED); + } + callout_stop(&bs->bs_bstpcallout); } static int
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