netdev - Re: [PATCH net-next v2] net: clean up locking in inet_frag

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]

Message-ID: <1353942751.30446.1769.camel@edumazet-glaptop>
Date:	Mon, 26 Nov 2012 07:12:31 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Cong Wang <amwang@...hat.com>
Cc:	netdev@...r.kernel.org, Patrick McHardy <kaber@...sh.net>,
	Pablo Neira Ayuso <pablo@...filter.org>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH net-next v2] net: clean up locking in inet_frag_find()

On Mon, 2012-11-26 at 15:26 +0800, Cong Wang wrote:
> It is weird to take the read lock outside of inet_frag_find()
> but release it inside...  This can be improved by refactoring
> the code, that is, introducing inet{4,6}_frag_find() which call
> the their own hash function, inet{4,6}_hash_frag(), hiding the
> details from their callers.
> 
> Cc: Eric Dumazet <eric.dumazet@...il.com>
> Cc: Patrick McHardy <kaber@...sh.net>
> Cc: Pablo Neira Ayuso <pablo@...filter.org>
> Cc: David S. Miller <davem@...emloft.net>
> Signed-off-by: Cong Wang <amwang@...hat.com>
> 
> ---
>  include/net/inet_frag.h                 |   17 +++++-
>  include/net/ipv6.h                      |    3 -
>  net/ipv4/inet_fragment.c                |   82 +++++++++++++++++++++++++++++--
>  net/ipv4/ip_fragment.c                  |   16 +-----
>  net/ipv6/netfilter/nf_conntrack_reasm.c |    7 +--
>  net/ipv6/reassembly.c                   |   34 +------------
>  6 files changed, 97 insertions(+), 62 deletions(-)


Not clear to me its a win, as it adds 35 LOC. Nobody really complained
of this locking schem in the past.

Also Jesper is working on this stuff, so you dont really ease its work.



--
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