46 lines
1.7 KiB
Diff
46 lines
1.7 KiB
Diff
From 595b2e2e87f152c4ade7e2d66cb78915096f60c2 Mon Sep 17 00:00:00 2001
|
|
From: Donald Sharp <donaldsharp72@gmail.com>
|
|
Date: Mon, 2 Mar 2020 11:23:36 -0500
|
|
Subject: [PATCH] Ignore routes in non-main tables
|
|
|
|
Route lookup in Linux is bounded by `ip rules` as well
|
|
as the contents of specific routing tables. With the
|
|
advent of vrf's(l3mdev's) non-default tables are regularly being
|
|
used for routing purposes.
|
|
|
|
dnsmasq listens to all route changes on the box and responds
|
|
to each one with an event. This is *expensive* when a full
|
|
BGP routing table is placed into the linux kernel, moreso
|
|
when dnsmasq is responding to events in tables that it will
|
|
never actually need to respond to, since dnsmasq at this
|
|
point in time has no concept of vrf's and would need
|
|
to be programmed to understand them. Help alleviate this load
|
|
by reducing the set of data that dnsmasq pays attention to
|
|
when we know there are events that are not useful at this
|
|
point in time.
|
|
|
|
Signed-off-by: Donald Sharp <donaldsharp72@gmail.com>
|
|
(cherry picked from commit b2ed691eb3ca6488a8878f5f3dd950a07b14a9db)
|
|
---
|
|
src/netlink.c | 4 +++-
|
|
1 file changed, 3 insertions(+), 1 deletion(-)
|
|
|
|
diff --git a/src/netlink.c b/src/netlink.c
|
|
index 8cd51af..0a3da3e 100644
|
|
--- a/src/netlink.c
|
|
+++ b/src/netlink.c
|
|
@@ -363,7 +363,9 @@ static void nl_async(struct nlmsghdr *h)
|
|
failing. */
|
|
struct rtmsg *rtm = NLMSG_DATA(h);
|
|
|
|
- if (rtm->rtm_type == RTN_UNICAST && rtm->rtm_scope == RT_SCOPE_LINK)
|
|
+ if (rtm->rtm_type == RTN_UNICAST && rtm->rtm_scope == RT_SCOPE_LINK &&
|
|
+ (rtm->rtm_table == RT_TABLE_MAIN ||
|
|
+ rtm->rtm_table == RT_TABLE_LOCAL))
|
|
queue_event(EVENT_NEWROUTE);
|
|
}
|
|
else if (h->nlmsg_type == RTM_NEWADDR || h->nlmsg_type == RTM_DELADDR)
|
|
--
|
|
2.26.2
|
|
|