[IPV6]: Make fib6_rules_init to return an error code.

When the fib_rules initialization finished, no return code is provided
so there is no way to know, for the caller, if the initialization has
been successful or has failed. This patch fix that.

Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>
Acked-by: Benjamin Thery <benjamin.thery@bull.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 21 insertions, 6 deletions

diff --git a/include/net/fib_rules.h b/include/net/fib_rules.h
index 41a301e38643..2364db1a47e6 100644
--- a/include/net/fib_rules.h
+++ b/include/net/fib_rules.h
@@ -103,6 +103,7 @@ static inline u32 frh_get_table(struct fib_rule_hdr *frh, struct nlattr **nla)
 
 extern int                      fib_rules_register(struct fib_rules_ops *);
 extern int                      fib_rules_unregister(struct fib_rules_ops *);
+extern void                     fib_rules_cleanup_ops(struct fib_rules_ops *);
 
 extern int                      fib_rules_lookup(struct fib_rules_ops *,
                                                  struct flowi *, int flags,
diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h
index 5d39ce92afcf..eaa315868792 100644
--- a/include/net/ip6_fib.h
+++ b/include/net/ip6_fib.h
@@ -226,7 +226,7 @@ extern void			fib6_gc_cleanup(void);
 
 extern int                      fib6_init(void);
 
-extern void                     fib6_rules_init(void);
+extern int                      fib6_rules_init(void);
 extern void                     fib6_rules_cleanup(void);
 
 #endif
diff --git a/net/core/fib_rules.c b/net/core/fib_rules.c
index 0af0538343da..fcbf41c0a5d4 100644
--- a/net/core/fib_rules.c
+++ b/net/core/fib_rules.c
@@ -102,7 +102,7 @@ errout:
 
 EXPORT_SYMBOL_GPL(fib_rules_register);
 
-static void cleanup_ops(struct fib_rules_ops *ops)
+void fib_rules_cleanup_ops(struct fib_rules_ops *ops)
 {
         struct fib_rule *rule, *tmp;
 
@@ -111,6 +111,7 @@ static void cleanup_ops(struct fib_rules_ops *ops)
                 fib_rule_put(rule);
         }
 }
+EXPORT_SYMBOL_GPL(fib_rules_cleanup_ops);
 
 int fib_rules_unregister(struct fib_rules_ops *ops)
 {
@@ -121,7 +122,7 @@ int fib_rules_unregister(struct fib_rules_ops *ops)
         list_for_each_entry(o, &rules_ops, list) {
                 if (o == ops) {
                         list_del_rcu(&o->list);
-                        cleanup_ops(ops);
+                        fib_rules_cleanup_ops(ops);
                         goto out;
                 }
         }
diff --git a/net/ipv6/fib6_rules.c b/net/ipv6/fib6_rules.c
index 428c6b0e26d8..9ce2e0a6748a 100644
--- a/net/ipv6/fib6_rules.c
+++ b/net/ipv6/fib6_rules.c
@@ -265,10 +265,23 @@ static int __init fib6_default_rules_init(void)
         return 0;
 }
 
-void __init fib6_rules_init(void)
+int __init fib6_rules_init(void)
 {
-        BUG_ON(fib6_default_rules_init());
-        fib_rules_register(&fib6_rules_ops);
+        int ret;
+
+        ret = fib6_default_rules_init();
+        if (ret)
+                goto out;
+
+        ret = fib_rules_register(&fib6_rules_ops);
+        if (ret)
+                goto out_default_rules_init;
+out:
+        return ret;
+
+out_default_rules_init:
+        fib_rules_cleanup_ops(&fib6_rules_ops);
+        goto out;
 }
 
 void fib6_rules_cleanup(void)