netdev - [PATCH v2 2/2] ipv6: Warn users if maximum number of routes is reached.

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Date:	Mon,  8 Nov 2010 14:33:48 -0800
From:	Ben Greear <greearb@...delatech.com>
To:	netdev@...r.kernel.org
Cc:	Ben Greear <greearb@...delatech.com>
Subject: [PATCH v2 2/2] ipv6:  Warn users if maximum number of routes is reached.

This gives users at least some clue as to what the problem
might be and how to go about fixing it.

Signed-off-by: Ben Greear <greearb@...delatech.com>
---

v1 -> v2:  Put warning in correct place.

:100644 100644 a275c6e... 9d9d0e9... M	net/ipv6/route.c
 net/ipv6/route.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index a275c6e..9d9d0e9 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1941,8 +1941,12 @@ struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
 	struct rt6_info *rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops);
 	struct neighbour *neigh;
 
-	if (rt == NULL)
+	if (rt == NULL) {
+		if (net_ratelimit())
+			pr_warning("IPv6:  Maximum number of routes reached,"
+				   " consider increasing route/max_size.\n");
 		return ERR_PTR(-ENOMEM);
+	}
 
 	dev_hold(net->loopback_dev);
 	in6_dev_hold(idev);
-- 
1.6.2.5

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