linux-kernel - [PATCH V2] netfilter/iptables: Fix log-level processing

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Message-ID: <1347451493.8707.4.camel@joe2Laptop>
Date:	Wed, 12 Sep 2012 05:04:53 -0700
From:	Joe Perches <joe@...ches.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	auto75914331@...hmail.com,
	Bart De Schuymer <bart.de.schuymer@...dora.be>,
	Pablo Neira Ayuso <pablo@...filter.org>,
	Patrick McHardy <kaber@...sh.net>,
	Stephen Hemminger <shemminger@...tta.com>,
	netfilter-devel@...r.kernel.org, netfilter@...r.kernel.org,
	coreteam@...filter.org, bridge@...ts.linux-foundation.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH V2] netfilter/iptables: Fix log-level processing

auto75914331@...hmail.com reports that iptables does not correctly
output the KERN_<level>.

$IPTABLES -A RULE_0_in  -j LOG  --log-level notice --log-prefix "DENY  in: "

result with linux 3.6-rc5
Sep 12 06:37:29 xxxxx kernel: <5>DENY  in: IN=eth0 OUT= MAC=.......

result with linux 3.5.3 and older:
Sep  9 10:43:01 xxxxx kernel: DENY  in: IN=eth0 OUT= MAC......

commit 04d2c8c83d0
("printk: convert the format for KERN_<LEVEL> to a 2 byte pattern")
updated the syslog header style but did not update netfilter uses.

Do so.

Signed-off-by: Joe Perches <joe@...ches.com>
cc: auto75914331@...hmail.com
---
v2: Use KERN_SOH and string concatenation instead of "%c" KERN_SOH_ASCII
as suggested by Eric Dumazet.

 net/bridge/netfilter/ebt_log.c |    2 +-
 net/netfilter/xt_LOG.c         |    4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/net/bridge/netfilter/ebt_log.c b/net/bridge/netfilter/ebt_log.c
index f88ee53..92de5e5 100644
--- a/net/bridge/netfilter/ebt_log.c
+++ b/net/bridge/netfilter/ebt_log.c
@@ -80,7 +80,7 @@ ebt_log_packet(u_int8_t pf, unsigned int hooknum,
 	unsigned int bitmask;
 
 	spin_lock_bh(&ebt_log_lock);
-	printk("<%c>%s IN=%s OUT=%s MAC source = %pM MAC dest = %pM proto = 0x%04x",
+	printk(KERN_SOH "%c%s IN=%s OUT=%s MAC source = %pM MAC dest = %pM proto = 0x%04x",
 	       '0' + loginfo->u.log.level, prefix,
 	       in ? in->name : "", out ? out->name : "",
 	       eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest,
diff --git a/net/netfilter/xt_LOG.c b/net/netfilter/xt_LOG.c
index ff5f75f..d1609dd 100644
--- a/net/netfilter/xt_LOG.c
+++ b/net/netfilter/xt_LOG.c
@@ -436,8 +436,8 @@ log_packet_common(struct sbuff *m,
 		  const struct nf_loginfo *loginfo,
 		  const char *prefix)
 {
-	sb_add(m, "<%d>%sIN=%s OUT=%s ", loginfo->u.log.level,
-	       prefix,
+	sb_add(m, KERN_SOH "%c%sIN=%s OUT=%s ",
+	       '0' + loginfo->u.log.level, prefix,
 	       in ? in->name : "",
 	       out ? out->name : "");
 #ifdef CONFIG_BRIDGE_NETFILTER



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