* [PATCH net-next] rtnetlink: skip metrics loop for dst_default_metrics
@ 2019-06-21 23:27 David Ahern
2019-06-26 20:15 ` David Miller
0 siblings, 1 reply; 2+ messages in thread
From: David Ahern @ 2019-06-21 23:27 UTC (permalink / raw)
To: davem; +Cc: netdev, David Ahern
From: David Ahern <dsahern@gmail.com>
dst_default_metrics has all of the metrics initialized to 0, so nothing
will be added to the skb in rtnetlink_put_metrics. Avoid the loop if
metrics is from dst_default_metrics.
Signed-off-by: David Ahern <dsahern@gmail.com>
---
net/core/rtnetlink.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 8ac81630ab5c..1ee6460f8275 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -751,6 +751,10 @@ int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
struct nlattr *mx;
int i, valid = 0;
+ /* nothing is dumped for dst_default_metrics, so just skip the loop */
+ if (metrics == dst_default_metrics.metrics)
+ return 0;
+
mx = nla_nest_start_noflag(skb, RTA_METRICS);
if (mx == NULL)
return -ENOBUFS;
--
2.11.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH net-next] rtnetlink: skip metrics loop for dst_default_metrics
2019-06-21 23:27 [PATCH net-next] rtnetlink: skip metrics loop for dst_default_metrics David Ahern
@ 2019-06-26 20:15 ` David Miller
0 siblings, 0 replies; 2+ messages in thread
From: David Miller @ 2019-06-26 20:15 UTC (permalink / raw)
To: dsahern; +Cc: netdev, dsahern
From: David Ahern <dsahern@kernel.org>
Date: Fri, 21 Jun 2019 16:27:16 -0700
> From: David Ahern <dsahern@gmail.com>
>
> dst_default_metrics has all of the metrics initialized to 0, so nothing
> will be added to the skb in rtnetlink_put_metrics. Avoid the loop if
> metrics is from dst_default_metrics.
>
> Signed-off-by: David Ahern <dsahern@gmail.com>
Applied, thanks David.
^ permalink raw reply [flat|nested] 2+ messages in thread
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