More easy rt_ifidx changes

[Martin Pieuchot]

Index: net/if.c
===================================================================
RCS file: /cvs/src/sys/net/if.c,v
retrieving revision 1.398
diff -u -p -r1.398 if.c
--- net/if.c    25 Oct 2015 21:58:04 -0000      1.398
+++ net/if.c    26 Oct 2015 16:02:06 -0000
@@ -2341,6 +2341,7 @@ if_group_routechange(struct sockaddr *ds
 int
 if_group_egress_build(void)
 {
+       struct ifnet            *ifp;
        struct ifg_group        *ifg;
        struct ifg_member       *ifgm, *next;
        struct sockaddr_in       sa_in;
@@ -2364,8 +2365,11 @@ if_group_egress_build(void)
        if (rt0 != NULL) {
                rt = rt0;
                do {
-                       if (rt->rt_ifp)
-                               if_addgroup(rt->rt_ifp, IFG_EGRESS);
+                       ifp = if_get(rt->rt_ifidx);
+                       if (ifp != NULL) {
+                               if_addgroup(ifp, IFG_EGRESS);
+                               if_put(ifp);
+                       }
 #ifndef SMALL_KERNEL
                        rt = rt_mpath_next(rt);
 #else
@@ -2381,8 +2385,11 @@ if_group_egress_build(void)
        if (rt0 != NULL) {
                rt = rt0;
                do {
-                       if (rt->rt_ifp)
-                               if_addgroup(rt->rt_ifp, IFG_EGRESS);
+                       ifp = if_get(rt->rt_ifidx);
+                       if (ifp != NULL) {
+                               if_addgroup(ifp, IFG_EGRESS);
+                               if_put(ifp);
+                       }
 #ifndef SMALL_KERNEL
                        rt = rt_mpath_next(rt);
 #else
Index: net/pf.c
===================================================================
RCS file: /cvs/src/sys/net/pf.c,v
retrieving revision 1.947
diff -u -p -r1.947 pf.c
--- net/pf.c    13 Oct 2015 19:32:31 -0000      1.947
+++ net/pf.c    26 Oct 2015 16:03:57 -0000
@@ -2912,6 +2912,7 @@ pf_get_mss(struct pf_pdesc *pd)
 u_int16_t
 pf_calc_mss(struct pf_addr *addr, sa_family_t af, int rtableid, u_int16_t 
offer)
 {
+       struct ifnet            *ifp;
        struct sockaddr_in      *dst;
 #ifdef INET6
        struct sockaddr_in6     *dst6;
@@ -2944,11 +2945,12 @@ pf_calc_mss(struct pf_addr *addr, sa_fam
 #endif /* INET6 */
        }
 
-       if (rt && rt->rt_ifp) {
-               mss = rt->rt_ifp->if_mtu - hlen - sizeof(struct tcphdr);
+       if (rt != NULL && (ifp = if_get(rt->rt_ifidx)) != NULL) {
+               mss = ifp->if_mtu - hlen - sizeof(struct tcphdr);
                mss = max(tcp_mssdflt, mss);
-               rtfree(rt);
+               if_put(ifp);
        }
+       rtfree(rt);
        mss = min(mss, offer);
        mss = max(mss, 64);             /* sanity - at least max opt space */
        return (mss);
Index: netinet6/nd6.c
===================================================================
RCS file: /cvs/src/sys/netinet6/nd6.c,v
retrieving revision 1.162
diff -u -p -r1.162 nd6.c
--- netinet6/nd6.c      25 Oct 2015 15:11:52 -0000      1.162
+++ netinet6/nd6.c      26 Oct 2015 16:23:23 -0000
@@ -392,8 +392,8 @@ nd6_llinfo_timer(void *arg)
 
        if ((rt = ln->ln_rt) == NULL)
                panic("ln->ln_rt == NULL");
-       if ((ifp = rt->rt_ifp) == NULL)
-               panic("ln->ln_rt->rt_ifp == NULL");
+       if ((ifp = if_get(rt->rt_ifidx)) == NULL)
+               return;
        ndi = ND_IFINFO(ifp);
        dst = satosin6(rt_key(rt));
 
@@ -477,6 +477,7 @@ nd6_llinfo_timer(void *arg)
                break;
        }
 
+       if_put(ifp);
        splx(s);
 }