[RFC PATCH net-next v1 1/3] net: route: expire rt if the dst it holds is expired

Leone Fernando
2024-01-25T13:12:56Z

The function rt_is_expired is used to verify that a cached dst is valid.
Currently, this function ignores the rt.dst->expires value.

Add a check to rt_is_expired that validates that the dst is not expired.

Signed-off-by: Leone Fernando <leone4fernando@gmail.com>
---
net/ipv4/route.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 16615d107cf0..7c5e68117ee2 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -392,7 +392,8 @@ static inline int ip_rt_proc_init(void)

static inline bool rt_is_expired(const struct rtable *rth)
{
- return rth->rt_genid != rt_genid_ipv4(dev_net(rth->dst.dev));
+ return rth->rt_genid != rt_genid_ipv4(dev_net(rth->dst.dev)) ||
+ (rth->dst.expires && time_after(jiffies, rth->dst.expires));
}

void rt_cache_flush(struct net *net)
--
2.34.1