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| author | Eric Dumazet <edumazet@google.com> | 2022-02-07 20:50:34 -0800 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-02-08 20:41:34 -0800 |
| commit | e2f736b753ecb70174f862aa040184e85c158255 (patch) | |
| tree | 370f4ac18d03bb87334f93943bf060bcf4667e96 /net/ipv6/ip6mr.c | |
| parent | ea3e91666ddd9f141632157ee601325d1d207061 (diff) | |
| download | lwn-e2f736b753ecb70174f862aa040184e85c158255.tar.gz lwn-e2f736b753ecb70174f862aa040184e85c158255.zip | |
ip6mr: introduce ip6mr_net_exit_batch()
cleanup_net() is competing with other rtnl users.
Avoiding to acquire rtnl for each netns before calling
ip6mr_rules_exit() gives chance for cleanup_net()
to progress much faster, holding rtnl a bit longer.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/ipv6/ip6mr.c')
| -rw-r--r-- | net/ipv6/ip6mr.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c index fd660414d482..881fe6b50307 100644 --- a/net/ipv6/ip6mr.c +++ b/net/ipv6/ip6mr.c @@ -253,13 +253,12 @@ static void __net_exit ip6mr_rules_exit(struct net *net) { struct mr_table *mrt, *next; - rtnl_lock(); + ASSERT_RTNL(); list_for_each_entry_safe(mrt, next, &net->ipv6.mr6_tables, list) { list_del(&mrt->list); ip6mr_free_table(mrt); } fib_rules_unregister(net->ipv6.mr6_rules_ops); - rtnl_unlock(); } static int ip6mr_rules_dump(struct net *net, struct notifier_block *nb, @@ -316,10 +315,9 @@ static int __net_init ip6mr_rules_init(struct net *net) static void __net_exit ip6mr_rules_exit(struct net *net) { - rtnl_lock(); + ASSERT_RTNL(); ip6mr_free_table(net->ipv6.mrt6); net->ipv6.mrt6 = NULL; - rtnl_unlock(); } static int ip6mr_rules_dump(struct net *net, struct notifier_block *nb, @@ -1323,7 +1321,9 @@ static int __net_init ip6mr_net_init(struct net *net) proc_cache_fail: remove_proc_entry("ip6_mr_vif", net->proc_net); proc_vif_fail: + rtnl_lock(); ip6mr_rules_exit(net); + rtnl_unlock(); #endif ip6mr_rules_fail: ip6mr_notifier_exit(net); @@ -1336,13 +1336,23 @@ static void __net_exit ip6mr_net_exit(struct net *net) remove_proc_entry("ip6_mr_cache", net->proc_net); remove_proc_entry("ip6_mr_vif", net->proc_net); #endif - ip6mr_rules_exit(net); ip6mr_notifier_exit(net); } +static void __net_exit ip6mr_net_exit_batch(struct list_head *net_list) +{ + struct net *net; + + rtnl_lock(); + list_for_each_entry(net, net_list, exit_list) + ip6mr_rules_exit(net); + rtnl_unlock(); +} + static struct pernet_operations ip6mr_net_ops = { .init = ip6mr_net_init, .exit = ip6mr_net_exit, + .exit_batch = ip6mr_net_exit_batch, }; int __init ip6_mr_init(void) |