diff options
| -rw-r--r-- | net/ipv4/route.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c index cd76b3cb7092..65b3a8b11a6c 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -1085,8 +1085,16 @@ restart: now = jiffies; if (!rt_caching(dev_net(rt->u.dst.dev))) { - rt_drop(rt); - return 0; + /* + * If we're not caching, just tell the caller we + * were successful and don't touch the route. The + * caller hold the sole reference to the cache entry, and + * it will be released when the caller is done with it. + * If we drop it here, the callers have no way to resolve routes + * when we're not caching. Instead, just point *rp at rt, so + * the caller gets a single use out of the route + */ + goto report_and_exit; } rthp = &rt_hash_table[hash].chain; @@ -1217,6 +1225,8 @@ restart: rcu_assign_pointer(rt_hash_table[hash].chain, rt); spin_unlock_bh(rt_hash_lock_addr(hash)); + +report_and_exit: if (rp) *rp = rt; else |