Since the expires of the DST_NOCACHE rt can be set during
the ip6_rt_update_pmtu(), we also need to consider the expires
value when doing ip6_dst_check().
This patches creates __rt6_check_expired() to only
check the expire value (if one exists) of the current rt.
In rt6_dst_from_check(), it adds __rt6_check_expired() as
one of the condition check.
Signed-off-by: Martin KaFai Lau <ka...@fb.com>
Cc: Hannes Frederic Sowa <han...@stressinduktion.org>
---
net/ipv6/route.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 74907c5..3754cf9 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -404,6 +404,14 @@ static void ip6_dst_ifdown(struct dst_entry *dst, struct
net_device *dev,
}
}
+static bool __rt6_check_expired(const struct rt6_info *rt)
+{
+ if (rt->rt6i_flags & RTF_EXPIRES)
+ return time_after(jiffies, rt->dst.expires);
+ else
+ return false;
+}
+
static bool rt6_check_expired(const struct rt6_info *rt)
{
if (rt->rt6i_flags & RTF_EXPIRES) {
@@ -1252,7 +1260,8 @@ static struct dst_entry *rt6_check(struct rt6_info *rt,
u32 cookie)
static struct dst_entry *rt6_dst_from_check(struct rt6_info *rt, u32 cookie)
{
- if (rt->dst.obsolete == DST_OBSOLETE_FORCE_CHK &&
+ if (!__rt6_check_expired(rt) &&
+ rt->dst.obsolete == DST_OBSOLETE_FORCE_CHK &&
rt6_check((struct rt6_info *)(rt->dst.from), cookie))
return &rt->dst;
else
--
2.5.1
--
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