[V2] net/netlink: optimize seq_puts and seq_printf in af_netlink.c

Before the patch, the command `cat /proc/net/netlink` will output like:

https://clbin.com/BojZv

After the patch:

https://clbin.com/lnu4L

The optimization will make convenience for using `cat /proc/net/netlink`
But,The checkpatch will give a warning:

WARNING: quoted string split across lines

Signed-off-by: Bo YU <tsu.yubo@gmail.com>
---
Changes in v2:
Do not break the indentation of the code line
---
 net/netlink/af_netlink.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--
2.11.0

On Thu, 3 May 2018, YU Bo wrote:

> Before the patch, the command `cat /proc/net/netlink` will output like:
>
> https://clbin.com/BojZv
>
> After the patch:
>
> https://clbin.com/lnu4L
>
> The optimization will make convenience for using `cat /proc/net/netlink`
> But,The checkpatch will give a warning:
>
> WARNING: quoted string split across lines

The interest of the checkpatch warning is that someone may want to grep
for something that has actually been split over two lines.  If this is not
an issue in your case and if there are good reasons for splitting the
string, then you can ignore checkpatch.

julia

>
> Signed-off-by: Bo YU <tsu.yubo@gmail.com>
> ---
> Changes in v2:
> Do not break the indentation of the code line
> ---
> net/netlink/af_netlink.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
> index 55342c4d5cec..2e2dd88fc79f 100644
> --- a/net/netlink/af_netlink.c
> +++ b/net/netlink/af_netlink.c
> @@ -2606,13 +2606,13 @@ static int netlink_seq_show(struct seq_file *seq, void
> *v)
> {
> 	if (v == SEQ_START_TOKEN) {
> 		seq_puts(seq,
> -			 "sk       Eth Pid    Groups   "
> -			 "Rmem     Wmem     Dump     Locks     Drops
> Inode\n");
> +			 "sk               Eth Pid        Groups   "
> +			 "Rmem     Wmem     Dump  Locks    Drops    Inode\n");
> 	} else {
> 		struct sock *s = v;
> 		struct netlink_sock *nlk = nlk_sk(s);
>
> -		seq_printf(seq, "%pK %-3d %-6u %08x %-8d %-8d %d %-8d %-8d
> %-8lu\n",
> +		seq_printf(seq, "%pK %-3d %-10u %08x %-8d %-8d %-5d %-8d %-8d
> %-8lu\n",
> 			   s,
> 			   s->sk_protocol,
> 			   nlk->portid,
> --
> 2.11.0
>
> --
> To unsubscribe from this list: send the line "unsubscribe kernel-janitors" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>

Hello,
On Thu, May 03, 2018 at 11:44:33AM +0200, Julia Lawall wrote:
>
>
>On Thu, 3 May 2018, YU Bo wrote:
>
>> Before the patch, the command `cat /proc/net/netlink` will output like:
>>
>> https://clbin.com/BojZv
>>
>> After the patch:
>>
>> https://clbin.com/lnu4L
>>
>> The optimization will make convenience for using `cat /proc/net/netlink`
>> But,The checkpatch will give a warning:
>>
>> WARNING: quoted string split across lines
>
>The interest of the checkpatch warning is that someone may want to grep
>for something that has actually been split over two lines.  If this is not
>an issue in your case and if there are good reasons for splitting the
>string, then you can ignore checkpatch.
Yes, the warning will be generated in original af_netlink.c and i dom't
think to split it is better.

Thank you!
>
>julia
>
>>
>> Signed-off-by: Bo YU <tsu.yubo@gmail.com>
>> ---
>> Changes in v2:
>> Do not break the indentation of the code line
>> ---
>> net/netlink/af_netlink.c | 6 +++---
>> 1 file changed, 3 insertions(+), 3 deletions(-)
>>
>> diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
>> index 55342c4d5cec..2e2dd88fc79f 100644
>> --- a/net/netlink/af_netlink.c
>> +++ b/net/netlink/af_netlink.c
>> @@ -2606,13 +2606,13 @@ static int netlink_seq_show(struct seq_file *seq, void
>> *v)
>> {
>> 	if (v == SEQ_START_TOKEN) {
>> 		seq_puts(seq,
>> -			 "sk       Eth Pid    Groups   "
>> -			 "Rmem     Wmem     Dump     Locks     Drops
>> Inode\n");
>> +			 "sk               Eth Pid        Groups   "
>> +			 "Rmem     Wmem     Dump  Locks    Drops    Inode\n");
>> 	} else {
>> 		struct sock *s = v;
>> 		struct netlink_sock *nlk = nlk_sk(s);
>>
>> -		seq_printf(seq, "%pK %-3d %-6u %08x %-8d %-8d %d %-8d %-8d
>> %-8lu\n",
>> +		seq_printf(seq, "%pK %-3d %-10u %08x %-8d %-8d %-5d %-8d %-8d
>> %-8lu\n",
>> 			   s,
>> 			   s->sk_protocol,
>> 			   nlk->portid,
>> --
>> 2.11.0
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe kernel-janitors" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>

From: YU Bo <tsu.yubo@gmail.com>
Date: Thu, 3 May 2018 05:09:04 -0400

> Before the patch, the command `cat /proc/net/netlink` will output
> like:
> 
> https://clbin.com/BojZv
> 
> After the patch:
> 
> https://clbin.com/lnu4L
> 
> The optimization will make convenience for using `cat
> /proc/net/netlink`
> But,The checkpatch will give a warning:
> 
> WARNING: quoted string split across lines
> 
> Signed-off-by: Bo YU <tsu.yubo@gmail.com>

Please do not reference external web sites for text which explains
the change in your commit message.

Simply show the /proc/net/netlink headers and then one line of the
output, before and after, in diff style.

Then it will be clear to the reader that you are not "optimizing"
anything.  This is not an optimization.

You are just making sure the headers line up properly with the
actual value output.

Thank you.