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Diffstat (limited to 'include/net/ip_fib.h')
-rw-r--r--include/net/ip_fib.h50
1 files changed, 29 insertions, 21 deletions
diff --git a/include/net/ip_fib.h b/include/net/ip_fib.h
index 09a819ee2151..5bd120e4bc0a 100644
--- a/include/net/ip_fib.h
+++ b/include/net/ip_fib.h
@@ -222,16 +222,19 @@ static inline struct fib_table *fib_new_table(struct net *net, u32 id)
static inline int fib_lookup(struct net *net, const struct flowi4 *flp,
struct fib_result *res)
{
- struct fib_table *table;
+ int err = -ENETUNREACH;
+
+ rcu_read_lock();
+
+ if (!fib_table_lookup(fib_get_table(net, RT_TABLE_LOCAL), flp, res,
+ FIB_LOOKUP_NOREF) ||
+ !fib_table_lookup(fib_get_table(net, RT_TABLE_MAIN), flp, res,
+ FIB_LOOKUP_NOREF))
+ err = 0;
- table = fib_get_table(net, RT_TABLE_LOCAL);
- if (!fib_table_lookup(table, flp, res, FIB_LOOKUP_NOREF))
- return 0;
+ rcu_read_unlock();
- table = fib_get_table(net, RT_TABLE_MAIN);
- if (!fib_table_lookup(table, flp, res, FIB_LOOKUP_NOREF))
- return 0;
- return -ENETUNREACH;
+ return err;
}
#else /* CONFIG_IP_MULTIPLE_TABLES */
@@ -247,20 +250,25 @@ static inline int fib_lookup(struct net *net, struct flowi4 *flp,
struct fib_result *res)
{
if (!net->ipv4.fib_has_custom_rules) {
+ int err = -ENETUNREACH;
+
+ rcu_read_lock();
+
res->tclassid = 0;
- if (net->ipv4.fib_local &&
- !fib_table_lookup(net->ipv4.fib_local, flp, res,
- FIB_LOOKUP_NOREF))
- return 0;
- if (net->ipv4.fib_main &&
- !fib_table_lookup(net->ipv4.fib_main, flp, res,
- FIB_LOOKUP_NOREF))
- return 0;
- if (net->ipv4.fib_default &&
- !fib_table_lookup(net->ipv4.fib_default, flp, res,
- FIB_LOOKUP_NOREF))
- return 0;
- return -ENETUNREACH;
+ if ((net->ipv4.fib_local &&
+ !fib_table_lookup(net->ipv4.fib_local, flp, res,
+ FIB_LOOKUP_NOREF)) ||
+ (net->ipv4.fib_main &&
+ !fib_table_lookup(net->ipv4.fib_main, flp, res,
+ FIB_LOOKUP_NOREF)) ||
+ (net->ipv4.fib_default &&
+ !fib_table_lookup(net->ipv4.fib_default, flp, res,
+ FIB_LOOKUP_NOREF)))
+ err = 0;
+
+ rcu_read_unlock();
+
+ return err;
}
return __fib_lookup(net, flp, res);
}