diff options
author | Kui-Feng Lee <thinker.li@gmail.com> | 2024-02-09 01:06:49 +0300 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2024-02-12 13:24:12 +0300 |
commit | 129e406e1811538c1afc9c8e97d61bb18eed3363 (patch) | |
tree | bb223ddcf21cf7c09effaed87a03d642d3530c17 /include/net/ip6_route.h | |
parent | 9c52994e32c5d8aaff13b1a13f7b35b988b02b26 (diff) | |
download | linux-129e406e1811538c1afc9c8e97d61bb18eed3363.tar.xz |
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/net/ip6_route.h')
-rw-r--r-- | include/net/ip6_route.h | 3 |
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); |