netfilter: fix Kconfig dependencies

Fix dependencies of netfilter realm match: it depends on NET_CLS_ROUTE,
which itself depends on NET_SCHED; this dependency is missing from netfilter.

Since matching on realms is also useful without having NET_SCHED enabled and
the option really only controls whether the tclassid member is included in
route and dst entries, rename the config option to IP_ROUTE_CLASSID and move
it outside of traffic scheduling context to get rid of the NET_SCHED dependeny.

Reported-by: Vladis Kletnieks <Valdis.Kletnieks@vt.edu>
Signed-off-by: Patrick McHardy <kaber@trash.net>

5 files changed, 29 insertions, 27 deletions

diff --git a/net/ipv4/Kconfig b/net/ipv4/Kconfig
index 9e95d7fb6d5a..dcb2e18f6f8e 100644
--- a/net/ipv4/Kconfig
+++ b/net/ipv4/Kconfig
@@ -140,6 +140,9 @@ config IP_ROUTE_VERBOSE
           handled by the klogd daemon which is responsible for kernel messages
           ("man klogd").
 
+config IP_ROUTE_CLASSID
+        bool
+
 config IP_PNP
         bool "IP: kernel level autoconfiguration"
         help
@@ -655,4 +658,3 @@ config TCP_MD5SIG
           on the Internet.
 
           If unsure, say N.
-
diff --git a/net/ipv4/fib_rules.c b/net/ipv4/fib_rules.c
index 7981a24f5c7b..9cefe72029cf 100644
--- a/net/ipv4/fib_rules.c
+++ b/net/ipv4/fib_rules.c
@@ -41,12 +41,12 @@ struct fib4_rule {
         __be32                  srcmask;
         __be32                  dst;
         __be32                  dstmask;
-#ifdef CONFIG_NET_CLS_ROUTE
+#ifdef CONFIG_IP_ROUTE_CLASSID
         u32                     tclassid;
 #endif
 };
 
-#ifdef CONFIG_NET_CLS_ROUTE
+#ifdef CONFIG_IP_ROUTE_CLASSID
 u32 fib_rules_tclass(struct fib_result *res)
 {
         return res->r ? ((struct fib4_rule *) res->r)->tclassid : 0;
@@ -165,7 +165,7 @@ static int fib4_rule_configure(struct fib_rule *rule, struct sk_buff *skb,
         if (frh->dst_len)
                 rule4->dst = nla_get_be32(tb[FRA_DST]);
 
-#ifdef CONFIG_NET_CLS_ROUTE
+#ifdef CONFIG_IP_ROUTE_CLASSID
         if (tb[FRA_FLOW])
                 rule4->tclassid = nla_get_u32(tb[FRA_FLOW]);
 #endif
@@ -195,7 +195,7 @@ static int fib4_rule_compare(struct fib_rule *rule, struct fib_rule_hdr *frh,
         if (frh->tos && (rule4->tos != frh->tos))
                 return 0;
 
-#ifdef CONFIG_NET_CLS_ROUTE
+#ifdef CONFIG_IP_ROUTE_CLASSID
         if (tb[FRA_FLOW] && (rule4->tclassid != nla_get_u32(tb[FRA_FLOW])))
                 return 0;
 #endif
@@ -224,7 +224,7 @@ static int fib4_rule_fill(struct fib_rule *rule, struct sk_buff *skb,
         if (rule4->src_len)
                 NLA_PUT_BE32(skb, FRA_SRC, rule4->src);
 
-#ifdef CONFIG_NET_CLS_ROUTE
+#ifdef CONFIG_IP_ROUTE_CLASSID
         if (rule4->tclassid)
                 NLA_PUT_U32(skb, FRA_FLOW, rule4->tclassid);
 #endif
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index 3e0da3ef6116..a72c62d03106 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -200,7 +200,7 @@ static inline int nh_comp(const struct fib_info *fi, const struct fib_info *ofi)
 #ifdef CONFIG_IP_ROUTE_MULTIPATH
                     nh->nh_weight != onh->nh_weight ||
 #endif
-#ifdef CONFIG_NET_CLS_ROUTE
+#ifdef CONFIG_IP_ROUTE_CLASSID
                     nh->nh_tclassid != onh->nh_tclassid ||
 #endif
                     ((nh->nh_flags ^ onh->nh_flags) & ~RTNH_F_DEAD))
@@ -422,7 +422,7 @@ static int fib_get_nhs(struct fib_info *fi, struct rtnexthop *rtnh,
 
                         nla = nla_find(attrs, attrlen, RTA_GATEWAY);
                         nexthop_nh->nh_gw = nla ? nla_get_be32(nla) : 0;
-#ifdef CONFIG_NET_CLS_ROUTE
+#ifdef CONFIG_IP_ROUTE_CLASSID
                         nla = nla_find(attrs, attrlen, RTA_FLOW);
                         nexthop_nh->nh_tclassid = nla ? nla_get_u32(nla) : 0;
 #endif
@@ -476,7 +476,7 @@ int fib_nh_match(struct fib_config *cfg, struct fib_info *fi)
                         nla = nla_find(attrs, attrlen, RTA_GATEWAY);
                         if (nla && nla_get_be32(nla) != nh->nh_gw)
                                 return 1;
-#ifdef CONFIG_NET_CLS_ROUTE
+#ifdef CONFIG_IP_ROUTE_CLASSID
                         nla = nla_find(attrs, attrlen, RTA_FLOW);
                         if (nla && nla_get_u32(nla) != nh->nh_tclassid)
                                 return 1;
@@ -783,7 +783,7 @@ struct fib_info *fib_create_info(struct fib_config *cfg)
                         goto err_inval;
                 if (cfg->fc_gw && fi->fib_nh->nh_gw != cfg->fc_gw)
                         goto err_inval;
-#ifdef CONFIG_NET_CLS_ROUTE
+#ifdef CONFIG_IP_ROUTE_CLASSID
                 if (cfg->fc_flow && fi->fib_nh->nh_tclassid != cfg->fc_flow)
                         goto err_inval;
 #endif
@@ -796,7 +796,7 @@ struct fib_info *fib_create_info(struct fib_config *cfg)
                 nh->nh_oif = cfg->fc_oif;
                 nh->nh_gw = cfg->fc_gw;
                 nh->nh_flags = cfg->fc_flags;
-#ifdef CONFIG_NET_CLS_ROUTE
+#ifdef CONFIG_IP_ROUTE_CLASSID
                 nh->nh_tclassid = cfg->fc_flow;
 #endif
 #ifdef CONFIG_IP_ROUTE_MULTIPATH
@@ -1006,7 +1006,7 @@ int fib_dump_info(struct sk_buff *skb, u32 pid, u32 seq, int event,
 
                 if (fi->fib_nh->nh_oif)
                         NLA_PUT_U32(skb, RTA_OIF, fi->fib_nh->nh_oif);
-#ifdef CONFIG_NET_CLS_ROUTE
+#ifdef CONFIG_IP_ROUTE_CLASSID
                 if (fi->fib_nh[0].nh_tclassid)
                         NLA_PUT_U32(skb, RTA_FLOW, fi->fib_nh[0].nh_tclassid);
 #endif
@@ -1031,7 +1031,7 @@ int fib_dump_info(struct sk_buff *skb, u32 pid, u32 seq, int event,
 
                         if (nh->nh_gw)
                                 NLA_PUT_BE32(skb, RTA_GATEWAY, nh->nh_gw);
-#ifdef CONFIG_NET_CLS_ROUTE
+#ifdef CONFIG_IP_ROUTE_CLASSID
                         if (nh->nh_tclassid)
                                 NLA_PUT_U32(skb, RTA_FLOW, nh->nh_tclassid);
 #endif
diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c
index d859bcc26cb7..d7b2b0987a3b 100644
--- a/net/ipv4/ip_input.c
+++ b/net/ipv4/ip_input.c
@@ -340,7 +340,7 @@ static int ip_rcv_finish(struct sk_buff *skb)
                 }
         }
 
-#ifdef CONFIG_NET_CLS_ROUTE
+#ifdef CONFIG_IP_ROUTE_CLASSID
         if (unlikely(skb_dst(skb)->tclassid)) {
                 struct ip_rt_acct *st = this_cpu_ptr(ip_rt_acct);
                 u32 idx = skb_dst(skb)->tclassid;
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 66610ea3c87b..f70ae1bccb8a 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -511,7 +511,7 @@ static const struct file_operations rt_cpu_seq_fops = {
         .release = seq_release,
 };
 
-#ifdef CONFIG_NET_CLS_ROUTE
+#ifdef CONFIG_IP_ROUTE_CLASSID
 static int rt_acct_proc_show(struct seq_file *m, void *v)
 {
         struct ip_rt_acct *dst, *src;
@@ -564,14 +564,14 @@ static int __net_init ip_rt_do_proc_init(struct net *net)
         if (!pde)
                 goto err2;
 
-#ifdef CONFIG_NET_CLS_ROUTE
+#ifdef CONFIG_IP_ROUTE_CLASSID
         pde = proc_create("rt_acct", 0, net->proc_net, &rt_acct_proc_fops);
         if (!pde)
                 goto err3;
 #endif
         return 0;
 
-#ifdef CONFIG_NET_CLS_ROUTE
+#ifdef CONFIG_IP_ROUTE_CLASSID
 err3:
         remove_proc_entry("rt_cache", net->proc_net_stat);
 #endif
@@ -585,7 +585,7 @@ static void __net_exit ip_rt_do_proc_exit(struct net *net)
 {
         remove_proc_entry("rt_cache", net->proc_net_stat);
         remove_proc_entry("rt_cache", net->proc_net);
-#ifdef CONFIG_NET_CLS_ROUTE
+#ifdef CONFIG_IP_ROUTE_CLASSID
         remove_proc_entry("rt_acct", net->proc_net);
 #endif
 }
@@ -1784,7 +1784,7 @@ void ip_rt_get_source(u8 *addr, struct rtable *rt)
         memcpy(addr, &src, 4);
 }
 
-#ifdef CONFIG_NET_CLS_ROUTE
+#ifdef CONFIG_IP_ROUTE_CLASSID
 static void set_class_tag(struct rtable *rt, u32 tag)
 {
         if (!(rt->dst.tclassid & 0xFFFF))
@@ -1811,7 +1811,7 @@ static void rt_set_nexthop(struct rtable *rt, struct fib_result *res, u32 itag)
                             rt->dst.dev->mtu > 576)
                                 rt->dst.metrics[RTAX_MTU-1] = 576;
                 }
-#ifdef CONFIG_NET_CLS_ROUTE
+#ifdef CONFIG_IP_ROUTE_CLASSID
                 rt->dst.tclassid = FIB_RES_NH(*res).nh_tclassid;
 #endif
         } else
@@ -1827,7 +1827,7 @@ static void rt_set_nexthop(struct rtable *rt, struct fib_result *res, u32 itag)
         if (dst_metric(&rt->dst, RTAX_ADVMSS) > 65535 - 40)
                 rt->dst.metrics[RTAX_ADVMSS-1] = 65535 - 40;
 
-#ifdef CONFIG_NET_CLS_ROUTE
+#ifdef CONFIG_IP_ROUTE_CLASSID
 #ifdef CONFIG_IP_MULTIPLE_TABLES
         set_class_tag(rt, fib_rules_tclass(res));
 #endif
@@ -1883,7 +1883,7 @@ static int ip_route_input_mc(struct sk_buff *skb, __be32 daddr, __be32 saddr,
         rth->fl.mark    = skb->mark;
         rth->fl.fl4_src = saddr;
         rth->rt_src     = saddr;
-#ifdef CONFIG_NET_CLS_ROUTE
+#ifdef CONFIG_IP_ROUTE_CLASSID
         rth->dst.tclassid = itag;
 #endif
         rth->rt_iif     =
@@ -2202,7 +2202,7 @@ local_input:
         rth->fl.mark    = skb->mark;
         rth->fl.fl4_src = saddr;
         rth->rt_src     = saddr;
-#ifdef CONFIG_NET_CLS_ROUTE
+#ifdef CONFIG_IP_ROUTE_CLASSID
         rth->dst.tclassid = itag;
 #endif
         rth->rt_iif     =
@@ -2820,7 +2820,7 @@ static int rt_fill_info(struct net *net,
         }
         if (rt->dst.dev)
                 NLA_PUT_U32(skb, RTA_OIF, rt->dst.dev->ifindex);
-#ifdef CONFIG_NET_CLS_ROUTE
+#ifdef CONFIG_IP_ROUTE_CLASSID
         if (rt->dst.tclassid)
                 NLA_PUT_U32(skb, RTA_FLOW, rt->dst.tclassid);
 #endif
@@ -3245,9 +3245,9 @@ static __net_initdata struct pernet_operations rt_genid_ops = {
 };
 
 
-#ifdef CONFIG_NET_CLS_ROUTE
+#ifdef CONFIG_IP_ROUTE_CLASSID
 struct ip_rt_acct __percpu *ip_rt_acct __read_mostly;
-#endif /* CONFIG_NET_CLS_ROUTE */
+#endif /* CONFIG_IP_ROUTE_CLASSID */
 
 static __initdata unsigned long rhash_entries;
 static int __init set_rhash_entries(char *str)
@@ -3263,7 +3263,7 @@ int __init ip_rt_init(void)
 {
         int rc = 0;
 
-#ifdef CONFIG_NET_CLS_ROUTE
+#ifdef CONFIG_IP_ROUTE_CLASSID
         ip_rt_acct = __alloc_percpu(256 * sizeof(struct ip_rt_acct), __alignof__(struct ip_rt_acct));
         if (!ip_rt_acct)
                 panic("IP: failed to allocate ip_rt_acct\n");