linux-kernel - Re: [PATCH v3 1/8] bluetooth: /proc/net/ entries for bluetooth protocols

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Message-Id: <20120711.211906.1087916687452547370.yamato@redhat.com>
Date:	Wed, 11 Jul 2012 21:19:06 +0900 (JST)
From:	Masatake YAMATO <yamato@...hat.com>
To:	andrei.emeltchenko.news@...il.com
Cc:	linux-kernel@...r.kernel.org, linux-bluetooth@...r.kernel.org
Subject: Re: [PATCH v3 1/8] bluetooth: /proc/net/ entries for bluetooth
 protocols

Hi,

> Hi Masatake,
> 
> On Wed, Jul 11, 2012 at 01:58:31PM +0900, Masatake YAMATO wrote:
>> (The patch sets are rebased to bluetooth-next. Unnecessary white
>> spaces are trimmed.)
>> 
>> lsof command can tell the type of socket processes are using.
>> Internal lsof uses inode numbers on socket fs to resolve the type of
>> sockets. Files under /proc/net/, such as tcp, udp, unix, etc provides
>> such inode information.
>> 
>> Unfortunately bluetooth related protocols don't provide such inode
>> information. This patch series introduces /proc/net files for the protocols.
>> 
>> This patch against af_bluetooth.c provides facility to the implementation
>> of protocols. This patch extends bt_sock_list and introduces two exported
>> function bt_procfs_init, bt_procfs_cleanup.
>> 
>> The type bt_sock_list is already used in some of implementation of
>> protocols. bt_procfs_init prepare seq_operations which converts
>> protocol own bt_sock_list data to protocol own proc entry when the
>> entry is accessed.
>> 
>> What I, lsof user, need is just inode number of bluetooth
>> socket. However, people may want more information. The bt_procfs_init
>> takes a function pointer for customizing the show handler of
>> seq_operations.
> 
> I've tested the patch and it creates entries in /proc/net

Thanks.
 
> BTW: Shall lsof be able to identify l2cap protocol?
> 
> for l2test it prints: "can't identify protocol"

No. I'll work on lsof side after the kernel side
patches are merged to the main line.


Masatake YAMATO

> Best regards 
> Andrei Emeltchenko  
> 
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