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authorKui-Feng Lee <thinker.li@gmail.com>2024-02-08 14:06:49 -0800
committerDavid S. Miller <davem@davemloft.net>2024-02-12 10:24:12 +0000
commit129e406e1811538c1afc9c8e97d61bb18eed3363 (patch)
treebb223ddcf21cf7c09effaed87a03d642d3530c17 /include
parent9c52994e32c5d8aaff13b1a13f7b35b988b02b26 (diff)
net/ipv6: set expires in rt6_add_dflt_router().
Pass the duration of a lifetime (in seconds) to the function rt6_add_dflt_router() so that it can properly set the expiration time. The function ndisc_router_discovery() is the only one that calls rt6_add_dflt_router(), and it will later set the expiration time for the route created by rt6_add_dflt_router(). However, there is a gap of time between calling rt6_add_dflt_router() and setting the expiration time in ndisc_router_discovery(). During this period, there is a possibility that a new route may be removed from the routing table. By setting the correct expiration time in rt6_add_dflt_router(), we can prevent this from happening. The reason for setting RTF_EXPIRES in rt6_add_dflt_router() is to start the Garbage Collection (GC) timer, as it only activates when a route with RTF_EXPIRES is added to a table. Suggested-by: David Ahern <dsahern@kernel.org> Reviewed-by: Hangbin Liu <liuhangbin@gmail.com> Reviewed-by: David Ahern <dsahern@kernel.org> Signed-off-by: Kui-Feng Lee <thinker.li@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/net/ip6_route.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/net/ip6_route.h b/include/net/ip6_route.h
index 28b065790261..52a51c69aa9d 100644
--- a/include/net/ip6_route.h
+++ b/include/net/ip6_route.h
@@ -170,7 +170,8 @@ struct fib6_info *rt6_get_dflt_router(struct net *net,
struct fib6_info *rt6_add_dflt_router(struct net *net,
const struct in6_addr *gwaddr,
struct net_device *dev, unsigned int pref,
- u32 defrtr_usr_metric);
+ u32 defrtr_usr_metric,
+ int lifetime);
void rt6_purge_dflt_routers(struct net *net);