From 648106c30a635e18fb55da60d4fcbfca6f6483ac Mon Sep 17 00:00:00 2001 From: Amit Cohen Date: Sun, 7 Feb 2021 10:22:51 +0200 Subject: IPv4: Extend 'fib_notify_on_flag_change' sysctl Add the value '2' to 'fib_notify_on_flag_change' to allow sending notifications only for failed route installation. Separate value is added for such notifications because there are less of them, so they do not impact performance and some users will find them more important. Signed-off-by: Amit Cohen Signed-off-by: Ido Schimmel Signed-off-by: David S. Miller --- net/ipv4/fib_trie.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'net/ipv4/fib_trie.c') diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c index 80147caa9bfd..25cf387cca5b 100644 --- a/net/ipv4/fib_trie.c +++ b/net/ipv4/fib_trie.c @@ -1053,6 +1053,12 @@ void fib_alias_hw_flags_set(struct net *net, const struct fib_rt_info *fri) fa_match->offload = fri->offload; fa_match->trap = fri->trap; + + /* 2 means send notifications only if offload_failed was changed. */ + if (net->ipv4.sysctl_fib_notify_on_flag_change == 2 && + fa_match->offload_failed == fri->offload_failed) + goto out; + fa_match->offload_failed = fri->offload_failed; if (!net->ipv4.sysctl_fib_notify_on_flag_change) -- cgit v1.2.3