Date: Fri, 12 Feb 2016 21:06:48 +0000 (UTC) From: Mark Johnston <markj@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r295580 - head/sys/netinet6 Message-ID: <201602122106.u1CL6miY036375@repo.freebsd.org>
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Author: markj Date: Fri Feb 12 21:06:48 2016 New Revision: 295580 URL: https://svnweb.freebsd.org/changeset/base/295580 Log: Simplify defrtrlist_update() slightly in preparation for future changes. No functional change intended. MFC after: 1 week Modified: head/sys/netinet6/nd6_rtr.c Modified: head/sys/netinet6/nd6_rtr.c ============================================================================== --- head/sys/netinet6/nd6_rtr.c Fri Feb 12 21:01:53 2016 (r295579) +++ head/sys/netinet6/nd6_rtr.c Fri Feb 12 21:06:48 2016 (r295580) @@ -734,42 +734,37 @@ static struct nd_defrouter * defrtrlist_update(struct nd_defrouter *new) { struct nd_defrouter *dr, *n; + int oldpref; if ((dr = defrouter_lookup(&new->rtaddr, new->ifp)) != NULL) { /* entry exists */ if (new->rtlifetime == 0) { defrtrlist_del(dr); - dr = NULL; - } else { - int oldpref = rtpref(dr); + return (NULL); + } - /* override */ - dr->flags = new->flags; /* xxx flag check */ - dr->rtlifetime = new->rtlifetime; - dr->expire = new->expire; + oldpref = rtpref(dr); - /* - * If the preference does not change, there's no need - * to sort the entries. Also make sure the selected - * router is still installed in the kernel. - */ - if (dr->installed && rtpref(new) == oldpref) - return (dr); + /* override */ + dr->flags = new->flags; /* xxx flag check */ + dr->rtlifetime = new->rtlifetime; + dr->expire = new->expire; - /* - * preferred router may be changed, so relocate - * this router. - * XXX: calling TAILQ_REMOVE directly is a bad manner. - * However, since defrtrlist_del() has many side - * effects, we intentionally do so here. - * defrouter_select() below will handle routing - * changes later. - */ - TAILQ_REMOVE(&V_nd_defrouter, dr, dr_entry); - n = dr; - goto insert; - } - return (dr); + /* + * If the preference does not change, there's no need + * to sort the entries. Also make sure the selected + * router is still installed in the kernel. + */ + if (dr->installed && rtpref(new) == oldpref) + return (dr); + + /* + * The preferred router may have changed, so relocate this + * router. + */ + TAILQ_REMOVE(&V_nd_defrouter, dr, dr_entry); + n = dr; + goto insert; } /* entry does not exist */
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