DomainKey-Signature: a=rsa-sha1; c=nofws;
        d=gmail.com; s=gamma;
        h=mime-version:in-reply-to:references:from:date:message-id:subject:to
         :cc:content-type:content-transfer-encoding;
        b=LmcJA271fR5zzR1Mb9EkI244a0Vd030lyAKvgoFn/LX9HBeI/ofhj6Su/9dJd+Xy4k
         SFB/mv1eFurtRZTlwQ5C2pWGArinp85qB/4b+s489A7FZNtnSQBtqSB7Et5ZJqVQqSDQ
         JN33pGG5MWLnzTNnTCnkC2Z0ZQrCIRfbmBzjA=
MIME-Version: 1.0
In-Reply-To: <20110205142648.GA9814@p183.telecom.by>
References: <cover.1296793770.git.lucian.grijincu@gmail.com>
 <AANLkTi=3kKhWRzM7S_f18YJ=jx1P7bN9zVo9yGC7zwN_@mail.gmail.com>
 <AANLkTik=a3NmibvYM6NxvqCiSiaE0oUFNtRaqn4+g_+D@mail.gmail.com> <20110205142648.GA9814@p183.telecom.by>
From: Lucian Adrian Grijincu <lucian.grijincu@gmail.com>
Date: Sat, 5 Feb 2011 16:59:04 +0200
Message-ID: <AANLkTi=Wg3_Uqrb=scquU9UojEJ_R_UyYhSYK6igt5sa@mail.gmail.com>
Subject: Re: [PATCH 0/5] net: sysctl: share ipv4/ipv6 sysctl tables
To: Alexey Dobriyan <adobriyan@gmail.com>
Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
        "Eric W. Biederman" <ebiederm@xmission.com>,
        Eric Dumazet <eric.dumazet@gmail.com>,
        "David S. Miller" <davem@davemloft.net>,
        Octavian Purdila <opurdila@ixiacom.com>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8BIT
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 902
Lines: 28

On Sat, Feb 5, 2011 at 4:26 PM, Alexey Dobriyan <adobriyan@gmail.com> wrote:
>> I'm not sure what I have to do to pass the name of a device (e.g.
>> "eth0") instead of "default" but at least "default" and "all" work and
>> have valid dentries.
>
> You do ->parent->procname.
>
> But, but you removed parent.


To be more exact I do:
  const char *dev_name = filp->f_path.dentry->d_parent->d_name.name;


If the sysctl table is shared between all network devices, the last
registered node will set the ->parent.

So accessing /proc/sys/net/ipv4/conf/$DEVNAME/$CTL will access $CTL
for the last network device registered not for $DEVNAME.

-- 
 .
..: Lucian
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/