From owner-p4-projects@FreeBSD.ORG Wed Aug 30 10:37:10 2006 Return-Path: X-Original-To: p4-projects@freebsd.org Delivered-To: p4-projects@freebsd.org Received: by hub.freebsd.org (Postfix, from userid 32767) id 91CFB16A4E1; Wed, 30 Aug 2006 10:37:10 +0000 (UTC) X-Original-To: perforce@freebsd.org Delivered-To: perforce@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 5DAED16A4DE for ; Wed, 30 Aug 2006 10:37:10 +0000 (UTC) (envelope-from piso@freebsd.org) Received: from repoman.freebsd.org (repoman.freebsd.org [216.136.204.115]) by mx1.FreeBSD.org (Postfix) with ESMTP id 1119B43D45 for ; Wed, 30 Aug 2006 10:37:10 +0000 (GMT) (envelope-from piso@freebsd.org) Received: from repoman.freebsd.org (localhost [127.0.0.1]) by repoman.freebsd.org (8.13.6/8.13.6) with ESMTP id k7UAb9So056606 for ; Wed, 30 Aug 2006 10:37:09 GMT (envelope-from piso@freebsd.org) Received: (from perforce@localhost) by repoman.freebsd.org (8.13.6/8.13.4/Submit) id k7UAb937056603 for perforce@freebsd.org; Wed, 30 Aug 2006 10:37:09 GMT (envelope-from piso@freebsd.org) Date: Wed, 30 Aug 2006 10:37:09 GMT Message-Id: <200608301037.k7UAb937056603@repoman.freebsd.org> X-Authentication-Warning: repoman.freebsd.org: perforce set sender to piso@freebsd.org using -f From: Paolo Pisati To: Perforce Change Reviews Cc: Subject: PERFORCE change 105319 for review X-BeenThere: p4-projects@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: p4 projects tree changes List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 30 Aug 2006 10:37:10 -0000 http://perforce.freebsd.org/chv.cgi?CH=105319 Change 105319 by piso@piso_newluxor on 2006/08/30 10:36:21 Replace nat hand-rolled rwlock with a standard rwlock. Affected files ... .. //depot/projects/soc2005/libalias/sys/netinet/ip_fw2.c#7 edit Differences ... ==== //depot/projects/soc2005/libalias/sys/netinet/ip_fw2.c#7 (text+ko) ==== @@ -302,62 +302,27 @@ MODULE_DEPEND(ipfw, libalias, 1, 1, 1); struct _nat_chain { - struct cfg_nat *chain; - struct mtx mtx; /* lock guarding rule list */ - int busy_count; /* busy count for rw locks */ - int want_write; - struct cv cv; + struct cfg_nat *chain; + struct rwlock rwl; } nat_chain; #define NAT_LOCK_INIT(_chain) \ - mtx_init(&(_chain)->mtx, "NAT instances", NULL, \ - MTX_DEF | MTX_RECURSE) -#define NAT_LOCK_DESTROY(_chain) mtx_destroy(&(_chain)->mtx) + rw_init(&(_chain)->rwl, "NAT instances") +#define NAT_LOCK_DESTROY(_chain) rw_destroy(&(_chain)->rwl) #define NAT_WLOCK_ASSERT(_chain) do { \ - mtx_assert(&(_chain)->mtx, MA_OWNED); \ + rw_assert(&(_chain)->rwl, RA_WLOCKED); \ NET_ASSERT_GIANT(); \ } while (0) -static __inline void -NAT_RLOCK(struct _nat_chain *chain) -{ - mtx_lock(&chain->mtx); - chain->busy_count++; - mtx_unlock(&chain->mtx); -} +#define NAT_RLOCK(p) rw_rlock(&(p)->rwl) +#define NAT_RUNLOCK(p) rw_runlock(&(p)->rwl) +#define NAT_WLOCK(p) rw_wlock(&(p)->rwl) +#define NAT_WUNLOCK(p) rw_wunlock(&(p)->rwl) -static __inline void -NAT_RUNLOCK(struct _nat_chain *chain) -{ - mtx_lock(&chain->mtx); - chain->busy_count--; - if (chain->busy_count == 0 && chain->want_write) - cv_signal(&chain->cv); - mtx_unlock(&chain->mtx); -} - -static __inline void -NAT_WLOCK(struct _nat_chain *chain) -{ - mtx_lock(&chain->mtx); - chain->want_write++; - while (chain->busy_count > 0) - cv_wait(&chain->cv, &chain->mtx); -} - -static __inline void -NAT_WUNLOCK(struct _nat_chain *chain) -{ - chain->want_write--; - cv_signal(&chain->cv); - mtx_unlock(&chain->mtx); -} - static eventhandler_tag ifaddr_event_tag; static int fw_deny_unknown_exthdrs = 1; - /* * L3HDR maps an ipv4 pointer into a layer3 header pointer of type T * Other macros just cast void * into the appropriate type @@ -4925,8 +4890,6 @@ ip_fw_chk_ptr = ipfw_chk; callout_reset(&ipfw_timeout, hz, ipfw_tick, NULL); nat_chain.chain = NULL; - nat_chain.busy_count = 0; - nat_chain.want_write = 0; NAT_LOCK_INIT(&nat_chain); ifaddr_event_tag = EVENTHANDLER_REGISTER(ifaddr_event, ifaddr_change, NULL, EVENTHANDLER_PRI_ANY);