netdev - Re: Adding inode field to /proc/net/netlink

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Sun, 28 Feb 2010 10:44:06 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Masatake YAMATO <yamato@...hat.com>
Cc:	davem@...emloft.net, netdev@...r.kernel.org
Subject: Re: Adding inode field to /proc/net/netlink

Le dimanche 28 février 2010 à 18:50 +0900, Masatake YAMATO a écrit :

> I understood but it has been already breaking:
> 
>     [yamato@xxx /proc/net]$ uname -a; cat /proc/net/netlink 
>     Linux xxx.redhat.com 2.6.29.6-217.2.16.fc11.x86_64 #1 SMP Mon Aug 24 17:17:40 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux
>     sk       Eth Pid    Groups   Rmem     Wmem     Dump     Locks
>     ffff8801bbde0400 0   2758   00000111 0        0        (null) 2
>     ...
> 
>     [yamato@yyy /proc/net]$ uname -a; cat /proc/net/netlink 
>     Linux yyy.redhat.com 2.6.30.10-105.2.23.fc11.x86_64 #1 SMP Thu Feb 11 07:06:34 UTC 2010 x86_64 x86_64 x86_64 GNU/Linux
>     sk       Eth Pid    Groups   Rmem     Wmem     Dump     Locks     Drops
>     ffff8800d83f5800 0   1783   00000001 0        0        (null) 2        0       
> 
> Drops field may be added between 2.6.29 and 2.6.30.
> Adding one more field is really problem?
> In other word, why "Drops" field was acceptable?
> 
> lsof uses following technique. It parses the header raw
> (here "    sk       Eth Pid    Groups   Rmem     Wmem     Dump     Locks     Drops")
> and picks values from columns only if the columns exits in the header raw.
> e.g. If "Inode" exists in the header, lsof tries to use Inode value.
> With the technique just adding(not deleting or swapping) a new column is not a big problem.
> 
> Masatake YAMATO
> 

Indeed :)

I am a big fan of Vic Abell lsof tool that I used before Linux was even
born :)



--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html