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authorIdo Schimmel <idosch@nvidia.com>2022-01-20 10:05:46 +0200
committerDavid S. Miller <davem@davemloft.net>2022-01-20 11:38:17 +0000
commit6cee105e7f2ced596373951d9ea08dacc3883c68 (patch)
tree185577a47873d219d8f4ceda4a1f792610290628 /net
parente2f08207c558bc0bc8abaa557cdb29bad776ac7b (diff)
ipv6_tunnel: Rate limit warning messages
The warning messages can be invoked from the data path for every packet transmitted through an ip6gre netdev, leading to high CPU utilization. Fix that by rate limiting the messages. Fixes: 09c6bbf090ec ("[IPV6]: Do mandatory IPv6 tunnel endpoint checks in realtime") Reported-by: Maksym Yaremchuk <maksymy@nvidia.com> Tested-by: Maksym Yaremchuk <maksymy@nvidia.com> Signed-off-by: Ido Schimmel <idosch@nvidia.com> Reviewed-by: Amit Cohen <amcohen@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv6/ip6_tunnel.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index fe786df4f849..97ade833f58c 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -1036,14 +1036,14 @@ int ip6_tnl_xmit_ctl(struct ip6_tnl *t,
if (unlikely(!ipv6_chk_addr_and_flags(net, laddr, ldev, false,
0, IFA_F_TENTATIVE)))
- pr_warn("%s xmit: Local address not yet configured!\n",
- p->name);
+ pr_warn_ratelimited("%s xmit: Local address not yet configured!\n",
+ p->name);
else if (!(p->flags & IP6_TNL_F_ALLOW_LOCAL_REMOTE) &&
!ipv6_addr_is_multicast(raddr) &&
unlikely(ipv6_chk_addr_and_flags(net, raddr, ldev,
true, 0, IFA_F_TENTATIVE)))
- pr_warn("%s xmit: Routing loop! Remote address found on this node!\n",
- p->name);
+ pr_warn_ratelimited("%s xmit: Routing loop! Remote address found on this node!\n",
+ p->name);
else
ret = 1;
rcu_read_unlock();