* [PATCH][net-next] tcp: remove the duplicate prefixes in the logging message
@ 2014-04-21 13:17 roy.qing.li
2014-04-22 0:04 ` Li RongQing
0 siblings, 1 reply; 6+ messages in thread
From: roy.qing.li @ 2014-04-21 13:17 UTC (permalink / raw)
To: netdev; +Cc: joe
From: Li RongQing <roy.qing.li@gmail.com>
The current message is:
TCP: TCP: Possible SYN flooding on port 80. Sending cookies. ...
The cause is that pr_info will implicitly print the pr_fmt string, which is standard
prefix, and explicitly print the "proto" which is "TCP:" too
it is unsuitable to not print proto, since proto maybe TCPv6, so use printk directly.
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Li RongQing <roy.qing.li@gmail.com>
---
net/ipv4/tcp_ipv4.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 6379894..370fa46 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -892,8 +892,8 @@ bool tcp_syn_flood_action(struct sock *sk,
lopt = inet_csk(sk)->icsk_accept_queue.listen_opt;
if (!lopt->synflood_warned && sysctl_tcp_syncookies != 2) {
lopt->synflood_warned = 1;
- pr_info("%s: Possible SYN flooding on port %d. %s. Check SNMP counters.\n",
- proto, ntohs(tcp_hdr(skb)->dest), msg);
+ printk(KERN_INFO "%s: Possible SYN flooding on port %d. %s. Check SNMP counters.\n"
+ proto, ntohs(tcp_hdr(skb)->dest), msg);
}
return want_cookie;
}
--
1.7.10.4
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH][net-next] tcp: remove the duplicate prefixes in the logging message
2014-04-21 13:17 [PATCH][net-next] tcp: remove the duplicate prefixes in the logging message roy.qing.li
@ 2014-04-22 0:04 ` Li RongQing
0 siblings, 0 replies; 6+ messages in thread
From: Li RongQing @ 2014-04-22 0:04 UTC (permalink / raw)
To: netdev; +Cc: joe
On Mon, Apr 21, 2014 at 9:17 PM, <roy.qing.li@gmail.com> wrote:
> From: Li RongQing <roy.qing.li@gmail.com>
>
Sorry, Please drop it, there is a build failure.
-Roy
^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH][net-next] tcp: remove the duplicate prefixes in the logging message
@ 2014-04-23 9:28 roy.qing.li
2014-04-23 9:35 ` Daniel Borkmann
0 siblings, 1 reply; 6+ messages in thread
From: roy.qing.li @ 2014-04-23 9:28 UTC (permalink / raw)
To: netdev; +Cc: joe
From: Li RongQing <roy.qing.li@gmail.com>
The current message is:
TCP: TCP: Possible SYN flooding on port 80. Sending cookies. ...
The cause is that pr_info will implicitly print the pr_fmt string, which is standard
prefix, and explicitly print the "proto" which is "TCP:" too
it is unsuitable to not print proto, since proto maybe TCPv6, so use printk directly.
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Li RongQing <roy.qing.li@gmail.com>
---
net/ipv4/tcp_ipv4.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 438f3b9..85ebe68 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -892,8 +892,8 @@ bool tcp_syn_flood_action(struct sock *sk,
lopt = inet_csk(sk)->icsk_accept_queue.listen_opt;
if (!lopt->synflood_warned && sysctl_tcp_syncookies != 2) {
lopt->synflood_warned = 1;
- pr_info("%s: Possible SYN flooding on port %d. %s. Check SNMP counters.\n",
- proto, ntohs(tcp_hdr(skb)->dest), msg);
+ printk(KERN_INFO "%s: Possible SYN flooding on port %d. %s. Check SNMP counters.\n",
+ proto, ntohs(tcp_hdr(skb)->dest), msg);
}
return want_cookie;
}
--
1.7.10.4
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH][net-next] tcp: remove the duplicate prefixes in the logging message
2014-04-23 9:28 roy.qing.li
@ 2014-04-23 9:35 ` Daniel Borkmann
2014-04-23 13:32 ` Li RongQing
0 siblings, 1 reply; 6+ messages in thread
From: Daniel Borkmann @ 2014-04-23 9:35 UTC (permalink / raw)
To: roy.qing.li; +Cc: netdev, joe
On 04/23/2014 11:28 AM, roy.qing.li@gmail.com wrote:
> From: Li RongQing <roy.qing.li@gmail.com>
>
> The current message is:
> TCP: TCP: Possible SYN flooding on port 80. Sending cookies. ...
>
> The cause is that pr_info will implicitly print the pr_fmt string, which is standard
> prefix, and explicitly print the "proto" which is "TCP:" too
>
> it is unsuitable to not print proto, since proto maybe TCPv6, so use printk directly.
Can't you just leave the pr_info() instead, and reword that into something like:
"Possible %s SYN flooding[...]", proto
> Cc: Joe Perches <joe@perches.com>
> Signed-off-by: Li RongQing <roy.qing.li@gmail.com>
> ---
> net/ipv4/tcp_ipv4.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
> index 438f3b9..85ebe68 100644
> --- a/net/ipv4/tcp_ipv4.c
> +++ b/net/ipv4/tcp_ipv4.c
> @@ -892,8 +892,8 @@ bool tcp_syn_flood_action(struct sock *sk,
> lopt = inet_csk(sk)->icsk_accept_queue.listen_opt;
> if (!lopt->synflood_warned && sysctl_tcp_syncookies != 2) {
> lopt->synflood_warned = 1;
> - pr_info("%s: Possible SYN flooding on port %d. %s. Check SNMP counters.\n",
> - proto, ntohs(tcp_hdr(skb)->dest), msg);
> + printk(KERN_INFO "%s: Possible SYN flooding on port %d. %s. Check SNMP counters.\n",
> + proto, ntohs(tcp_hdr(skb)->dest), msg);
> }
> return want_cookie;
> }
>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH][net-next] tcp: remove the duplicate prefixes in the logging message
2014-04-23 9:35 ` Daniel Borkmann
@ 2014-04-23 13:32 ` Li RongQing
2014-04-24 17:26 ` David Miller
0 siblings, 1 reply; 6+ messages in thread
From: Li RongQing @ 2014-04-23 13:32 UTC (permalink / raw)
To: Daniel Borkmann; +Cc: netdev, joe
On Wed, Apr 23, 2014 at 5:35 PM, Daniel Borkmann <dborkman@redhat.com> wrote:
> On 04/23/2014 11:28 AM, roy.qing.li@gmail.com wrote:
>>
>> From: Li RongQing <roy.qing.li@gmail.com>
>>
>> The current message is:
>> TCP: TCP: Possible SYN flooding on port 80. Sending cookies. ...
>>
>> The cause is that pr_info will implicitly print the pr_fmt string, which
>> is standard
>> prefix, and explicitly print the "proto" which is "TCP:" too
>>
>> it is unsuitable to not print proto, since proto maybe TCPv6, so use
>> printk directly.
>
>
> Can't you just leave the pr_info() instead, and reword that into something
> like:
>
> "Possible %s SYN flooding[...]", proto
To ipv4:
TCP: Possible TCP SYN flooding on port 80. Sending cookies. ...
To ipv6:
TCP: Possible TCPv6 SYN flooding on port 80. Sending cookies. ...
I think there are two "TCP" still, and it is duplicate;
-Roy
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH][net-next] tcp: remove the duplicate prefixes in the logging message
2014-04-23 13:32 ` Li RongQing
@ 2014-04-24 17:26 ` David Miller
0 siblings, 0 replies; 6+ messages in thread
From: David Miller @ 2014-04-24 17:26 UTC (permalink / raw)
To: roy.qing.li; +Cc: dborkman, netdev, joe
From: Li RongQing <roy.qing.li@gmail.com>
Date: Wed, 23 Apr 2014 21:32:43 +0800
> On Wed, Apr 23, 2014 at 5:35 PM, Daniel Borkmann <dborkman@redhat.com> wrote:
>> On 04/23/2014 11:28 AM, roy.qing.li@gmail.com wrote:
>>>
>>> From: Li RongQing <roy.qing.li@gmail.com>
>>>
>>> The current message is:
>>> TCP: TCP: Possible SYN flooding on port 80. Sending cookies. ...
>>>
>>> The cause is that pr_info will implicitly print the pr_fmt string, which
>>> is standard
>>> prefix, and explicitly print the "proto" which is "TCP:" too
>>>
>>> it is unsuitable to not print proto, since proto maybe TCPv6, so use
>>> printk directly.
>>
>>
>> Can't you just leave the pr_info() instead, and reword that into something
>> like:
>>
>> "Possible %s SYN flooding[...]", proto
> To ipv4:
>
> TCP: Possible TCP SYN flooding on port 80. Sending cookies. ...
>
> To ipv6:
>
> TCP: Possible TCPv6 SYN flooding on port 80. Sending cookies. ...
>
>
> I think there are two "TCP" still, and it is duplicate;
Just kill the proto string altogether, I don't think it doesn't adds
anything.
^ permalink raw reply [flat|nested] 6+ messages in thread
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2014-04-22 0:04 ` Li RongQing
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