linux-kernel - Re: Wiring up direct socket calls on x86

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Message-ID: <87twtnx343.fsf@totoro.br.ibm.com>
Date:	Wed, 01 Jul 2015 13:19:08 -0300
From:	"Tulio Magno Quites Machado Filho" <tuliom@...ux.vnet.ibm.com>
To:	Andy Lutomirski <luto@...capital.net>
Cc:	X86 ML <x86@...nel.org>,
	"linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>,
	Alexander Larsson <alexl@...hat.com>,
	Cosimo Cecchi <cosimo@...lessm.com>,
	Dan Nicholson <nicholson@...lessm.com>,
	Network Development <netdev@...r.kernel.org>,
	libc-alpha <libc-alpha@...rceware.org>,
	Rajalakshmi Srinivasaraghavan <raji@...ux.vnet.ibm.com>
Subject: Re: Wiring up direct socket calls on x86_32 Linux?

Andy Lutomirski <luto@...capital.net> writes:

> Hi all-
>
> sys_socketcall sucks.  If nothing else, it's impossible to filter with
> seccomp.  Should we wire up the real socket calls so that user code
> can (very slowly) start migrating?
>
> I think the list is:
>  - socket
>  - bind
>  - connect
>  - listen
>  - accept4
>  - getsockname
>  - getpeername
>  - socketpair
>  - send
>  - sendto
>  - sendmsg
>  - recv
>  - recvfrom
>  - recvmsg
>  - shutdown
>  - setsockopt

I guess you might want to follow the patch Raji sent today [1].

Her patch doesn't have all the syscalls you mentioned here, but has others too.
She will work to get a generic implementation for these functions.

[1] http://patchwork.sourceware.org/patch/7438/

-- 
Tulio Magno

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