linux-kernel - Re: [PATCH] x86: Wire up 32-bit direct socket calls

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Message-ID: <CALCETrVbNs-bOfr8cC3CC2RrBtKctdw4d0o9Ds6RQfXEm466YQ@mail.gmail.com>
Date:	Fri, 11 Sep 2015 09:32:46 -0700
From:	Andy Lutomirski <luto@...capital.net>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andy Lutomirski <luto@...nel.org>, X86 ML <x86@...nel.org>,
	Network Development <netdev@...r.kernel.org>,
	Tulio Magno Quites Machado Filho 
	<tuliom@...ux.vnet.ibm.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Alexander Larsson <alexl@...hat.com>,
	Cosimo Cecchi <cosimo@...lessm.com>,
	Dan Nicholson <nicholson@...lessm.com>,
	libc-alpha <libc-alpha@...rceware.org>,
	Rajalakshmi Srinivasaraghavan <raji@...ux.vnet.ibm.com>,
	Linux-Arch <linux-arch@...r.kernel.org>
Subject: Re: [PATCH] x86: Wire up 32-bit direct socket calls

On Fri, Sep 11, 2015 at 3:14 AM, Arnd Bergmann <arnd@...db.de> wrote:
> On Friday 11 September 2015 11:54:50 Geert Uytterhoeven wrote:
>> To make sure I don't miss any (it seems I missed recvmmsg and sendmmsg for
>> the socketcall case, sigh), this is the list of ipc syscalls to implement?
>>
>>     sys_msgget
>>     sys_msgctl
>>     sys_msgrcv
>>     sys_msgsnd
>>     sys_semget
>>     sys_semctl
>>     sys_semtimedop
>>     sys_shmget
>>     sys_shmctl
>>     sys_shmat
>>     sys_shmdt
>>
>> sys_semop() seems to be unneeded because it can be implemented using
>> sys_semtimedop()?
>>
>
> Yes, that list looks right. IPC also includes a set of six sys_mq_*
> call, but I believe that everyone already has those as they are not
> covered by sys_ipc.
>
> For y2038 compatibility, we will likely add a new variant of
> semtimedop that takes a 64-bit timespec. While the argument passed
> there is a relative time that will never need to be longer than 68
> years, we need to accommodate user space that defines timespec
> in a sane way, and converting the argument in libc would be awkward.
>

I missed sys_ipc entirely.

Ingo, Thomas, want to just wire those up, too?  I can send a patch
next week, but it'll be as trivial as the socket one.

--Andy
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