From 20d1565203e68cd32d5db3e293e7323173ad7a0d Mon Sep 17 00:00:00 2001 From: Ido Schimmel Date: Sat, 14 Dec 2019 17:53:13 +0200 Subject: [PATCH] ipv4: Only Replay routes of interest to new listeners When a new listener is registered to the FIB notification chain it receives a dump of all the available routes in the system. Instead, make sure to only replay the IPv4 routes that are actually used in the data path and are of any interest to the new listener. Signed-off-by: Ido Schimmel Reviewed-by: David Ahern Signed-off-by: David S. Miller --- net/ipv4/fib_trie.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c index c23be49ca51c..3f2ff97618ec 100644 --- a/net/ipv4/fib_trie.c +++ b/net/ipv4/fib_trie.c @@ -2080,6 +2080,7 @@ static int fib_leaf_notify(struct key_vector *l, struct fib_table *tb, struct netlink_ext_ack *extack) { struct fib_alias *fa; + int last_slen = -1; int err; hlist_for_each_entry_rcu(fa, &l->leaf, fa_list) { @@ -2099,6 +2100,16 @@ static int fib_leaf_notify(struct key_vector *l, struct fib_table *tb, fa, extack); if (err) return err; + + if (fa->fa_slen == last_slen) + continue; + + last_slen = fa->fa_slen; + err = call_fib_entry_notifier(nb, FIB_EVENT_ENTRY_REPLACE_TMP, + l->key, KEYLENGTH - fa->fa_slen, + fa, extack); + if (err) + return err; } return 0; } -- 2.30.2