linux-kernel - [PATCH] netfilter: nf_conntrack: table full detailed log

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Message-Id: <20250508081313.57914-1-xiafei_xupt@163.com>
Date: Thu,  8 May 2025 16:13:12 +0800
From: lvxiafei <xiafei_xupt@....com>
To: Pablo Neira Ayuso <pablo@...filter.org>,
	Jozsef Kadlecsik <kadlec@...filter.org>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Simon Horman <horms@...nel.org>
Cc: lvxiafei <lvxiafei@...setime.com>,
	netfilter-devel@...r.kernel.org,
	coreteam@...filter.org,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] netfilter: nf_conntrack: table full detailed log

From: lvxiafei <lvxiafei@...setime.com>

Add the netns field in the "nf_conntrack: table full,
dropping packet" log to help locate the specific netns
when the table is full.

Signed-off-by: lvxiafei <lvxiafei@...setime.com>
---
 net/netfilter/nf_conntrack_core.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
index 7f8b245e287a..71849960cf0c 100644
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -1659,7 +1659,8 @@ __nf_conntrack_alloc(struct net *net,
 			if (!conntrack_gc_work.early_drop)
 				conntrack_gc_work.early_drop = true;
 			atomic_dec(&cnet->count);
-			net_warn_ratelimited("nf_conntrack: table full, dropping packet\n");
+			net_warn_ratelimited("nf_conntrack: table full in netns %u, dropping packet\n",
+					     net->ns.inum);
 			return ERR_PTR(-ENOMEM);
 		}
 	}
-- 
2.40.1