From owner-svn-src-stable@freebsd.org Fri Jan 3 00:28:34 2020 Return-Path: Delivered-To: svn-src-stable@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id ECE331E0965; Fri, 3 Jan 2020 00:28:34 +0000 (UTC) (envelope-from markj@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 47pm3Q60WFz4CLZ; Fri, 3 Jan 2020 00:28:34 +0000 (UTC) (envelope-from markj@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id C8B4023CE9; Fri, 3 Jan 2020 00:28:34 +0000 (UTC) (envelope-from markj@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id 0030SYdA083736; Fri, 3 Jan 2020 00:28:34 GMT (envelope-from markj@FreeBSD.org) Received: (from markj@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 0030SYFd083735; Fri, 3 Jan 2020 00:28:34 GMT (envelope-from markj@FreeBSD.org) Message-Id: <202001030028.0030SYFd083735@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: markj set sender to markj@FreeBSD.org using -f From: Mark Johnston Date: Fri, 3 Jan 2020 00:28:34 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r356311 - stable/12/sys/net X-SVN-Group: stable-12 X-SVN-Commit-Author: markj X-SVN-Commit-Paths: stable/12/sys/net X-SVN-Commit-Revision: 356311 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SVN commit messages for all the -stable branches of the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 03 Jan 2020 00:28:35 -0000 Author: markj Date: Fri Jan 3 00:28:34 2020 New Revision: 356311 URL: https://svnweb.freebsd.org/changeset/base/356311 Log: MFC r355942: Deduplicate code between if_delgroup() and if_delgroups(). Modified: stable/12/sys/net/if.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/net/if.c ============================================================================== --- stable/12/sys/net/if.c Thu Jan 2 23:35:06 2020 (r356310) +++ stable/12/sys/net/if.c Fri Jan 3 00:28:34 2020 (r356311) @@ -1438,14 +1438,12 @@ if_addgroup(struct ifnet *ifp, const char *groupname) return (EEXIST); } - if ((ifgl = (struct ifg_list *)malloc(sizeof(struct ifg_list), M_TEMP, - M_NOWAIT)) == NULL) { + if ((ifgl = malloc(sizeof(*ifgl), M_TEMP, M_NOWAIT)) == NULL) { IFNET_WUNLOCK(); return (ENOMEM); } - if ((ifgm = (struct ifg_member *)malloc(sizeof(struct ifg_member), - M_TEMP, M_NOWAIT)) == NULL) { + if ((ifgm = malloc(sizeof(*ifgm), M_TEMP, M_NOWAIT)) == NULL) { free(ifgl, M_TEMP); IFNET_WUNLOCK(); return (ENOMEM); @@ -1456,8 +1454,7 @@ if_addgroup(struct ifnet *ifp, const char *groupname) break; if (ifg == NULL) { - if ((ifg = (struct ifg_group *)malloc(sizeof(struct ifg_group), - M_TEMP, M_NOWAIT)) == NULL) { + if ((ifg = malloc(sizeof(*ifg), M_TEMP, M_NOWAIT)) == NULL) { free(ifgl, M_TEMP); free(ifgm, M_TEMP); IFNET_WUNLOCK(); @@ -1489,39 +1486,36 @@ if_addgroup(struct ifnet *ifp, const char *groupname) } /* - * Remove a group from an interface + * Helper function to remove a group out of an interface. Expects the global + * ifnet lock to be write-locked, and drops it before returning. */ -int -if_delgroup(struct ifnet *ifp, const char *groupname) +static void +_if_delgroup_locked(struct ifnet *ifp, struct ifg_list *ifgl, + const char *groupname) { - struct ifg_list *ifgl; - struct ifg_member *ifgm; - int freeifgl; + struct ifg_member *ifgm; + bool freeifgl; - IFNET_WLOCK(); - CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) - if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) - break; - if (ifgl == NULL) { - IFNET_WUNLOCK(); - return (ENOENT); - } + IFNET_WLOCK_ASSERT(); - freeifgl = 0; IF_ADDR_WLOCK(ifp); CK_STAILQ_REMOVE(&ifp->if_groups, ifgl, ifg_list, ifgl_next); IF_ADDR_WUNLOCK(ifp); - CK_STAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) - if (ifgm->ifgm_ifp == ifp) + CK_STAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) { + if (ifgm->ifgm_ifp == ifp) { + CK_STAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, + ifg_member, ifgm_next); break; + } + } - if (ifgm != NULL) - CK_STAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifg_member, ifgm_next); - if (--ifgl->ifgl_group->ifg_refcnt == 0) { - CK_STAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_group, ifg_next); - freeifgl = 1; + CK_STAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_group, + ifg_next); + freeifgl = true; + } else { + freeifgl = false; } IFNET_WUNLOCK(); @@ -1534,7 +1528,27 @@ if_delgroup(struct ifnet *ifp, const char *groupname) free(ifgl, M_TEMP); EVENTHANDLER_INVOKE(group_change_event, groupname); +} +/* + * Remove a group from an interface + */ +int +if_delgroup(struct ifnet *ifp, const char *groupname) +{ + struct ifg_list *ifgl; + + IFNET_WLOCK(); + CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) + if (strcmp(ifgl->ifgl_group->ifg_group, groupname) == 0) + break; + if (ifgl == NULL) { + IFNET_WUNLOCK(); + return (ENOENT); + } + + _if_delgroup_locked(ifp, ifgl, groupname); + return (0); } @@ -1544,45 +1558,13 @@ if_delgroup(struct ifnet *ifp, const char *groupname) static void if_delgroups(struct ifnet *ifp) { - struct ifg_list *ifgl; - struct ifg_member *ifgm; + struct ifg_list *ifgl; char groupname[IFNAMSIZ]; - int ifglfree; IFNET_WLOCK(); - while (!CK_STAILQ_EMPTY(&ifp->if_groups)) { - ifgl = CK_STAILQ_FIRST(&ifp->if_groups); - + while ((ifgl = CK_STAILQ_FIRST(&ifp->if_groups)) != NULL) { strlcpy(groupname, ifgl->ifgl_group->ifg_group, IFNAMSIZ); - - IF_ADDR_WLOCK(ifp); - CK_STAILQ_REMOVE(&ifp->if_groups, ifgl, ifg_list, ifgl_next); - IF_ADDR_WUNLOCK(ifp); - - CK_STAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) - if (ifgm->ifgm_ifp == ifp) - break; - - if (ifgm != NULL) - CK_STAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifg_member, - ifgm_next); - ifglfree = 0; - if (--ifgl->ifgl_group->ifg_refcnt == 0) { - CK_STAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_group, ifg_next); - ifglfree = 1; - } - - IFNET_WUNLOCK(); - epoch_wait_preempt(net_epoch_preempt); - free(ifgm, M_TEMP); - if (ifglfree) { - EVENTHANDLER_INVOKE(group_detach_event, - ifgl->ifgl_group); - free(ifgl->ifgl_group, M_TEMP); - } - free(ifgl, M_TEMP); - EVENTHANDLER_INVOKE(group_change_event, groupname); - + _if_delgroup_locked(ifp, ifgl, groupname); IFNET_WLOCK(); } IFNET_WUNLOCK(); @@ -1670,7 +1652,7 @@ if_getgroupmembers(struct ifgroupreq *ifgr) IFNET_RLOCK(); CK_STAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) - if (!strcmp(ifg->ifg_group, ifgr->ifgr_name)) + if (strcmp(ifg->ifg_group, ifgr->ifgr_name) == 0) break; if (ifg == NULL) { IFNET_RUNLOCK();