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authorWei Wang <weiwan@google.com>2019-06-20 17:36:39 -0700
committerDavid S. Miller <davem@davemloft.net>2019-06-23 13:24:17 -0700
commitd64a1f574a2957b4bcb06452d36cc1c6bf16e9fc (patch)
treeb07474822bdef5a6e543daf192c8e23e3408e3fd /include
parent74109218b051c2431eec2569886627c7217e235a (diff)
downloadlinux-d64a1f574a2957b4bcb06452d36cc1c6bf16e9fc.tar.bz2
ipv6: honor RT6_LOOKUP_F_DST_NOREF in rule lookup logic
This patch specifically converts the rule lookup logic to honor this flag and not release refcnt when traversing each rule and calling lookup() on each routing table. Similar to previous patch, we also need some special handling of dst entries in uncached list because there is always 1 refcnt taken for them even if RT6_LOOKUP_F_DST_NOREF flag is set. Signed-off-by: Wei Wang <weiwan@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/net/ip6_route.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/include/net/ip6_route.h b/include/net/ip6_route.h
index 82bced2fc1e3..0709835c01ad 100644
--- a/include/net/ip6_route.h
+++ b/include/net/ip6_route.h
@@ -94,6 +94,16 @@ static inline struct dst_entry *ip6_route_output(struct net *net,
return ip6_route_output_flags(net, sk, fl6, 0);
}
+/* Only conditionally release dst if flags indicates
+ * !RT6_LOOKUP_F_DST_NOREF or dst is in uncached_list.
+ */
+static inline void ip6_rt_put_flags(struct rt6_info *rt, int flags)
+{
+ if (!(flags & RT6_LOOKUP_F_DST_NOREF) ||
+ !list_empty(&rt->rt6i_uncached))
+ ip6_rt_put(rt);
+}
+
struct dst_entry *ip6_route_lookup(struct net *net, struct flowi6 *fl6,
const struct sk_buff *skb, int flags);
struct rt6_info *ip6_pol_route(struct net *net, struct fib6_table *table,