linux-kernel - Re: [RFC PATCH 5/5] syscall: sys

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Date:	Wed, 15 Aug 2012 20:43:49 +0400
From:	Stanislav Kinsbursky <skinsbursky@...allels.com>
To:	"H. Peter Anvin" <hpa@...or.com>
CC:	"tglx@...utronix.de" <tglx@...utronix.de>,
	"mingo@...hat.com" <mingo@...hat.com>,
	"davem@...emloft.net" <davem@...emloft.net>,
	"thierry.reding@...onic-design.de" <thierry.reding@...onic-design.de>,
	"bfields@...hat.com" <bfields@...hat.com>,
	"eric.dumazet@...il.com" <eric.dumazet@...il.com>,
	Pavel Emelianov <xemul@...allels.com>,
	"neilb@...e.de" <neilb@...e.de>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"x86@...nel.org" <x86@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"paul.gortmaker@...driver.com" <paul.gortmaker@...driver.com>,
	"viro@...iv.linux.org.uk" <viro@...iv.linux.org.uk>,
	"gorcunov@...nvz.org" <gorcunov@...nvz.org>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"tim.c.chen@...ux.intel.com" <tim.c.chen@...ux.intel.com>,
	"devel@...nvz.org" <devel@...nvz.org>,
	"ebiederm@...ssion.com" <ebiederm@...ssion.com>
Subject: Re: [RFC PATCH 5/5] syscall: sys_fbind() introduced

15.08.2012 20:30, H. Peter Anvin пишет:
> On 08/15/2012 09:22 AM, Stanislav Kinsbursky wrote:
>> This syscall allows to bind socket to specified file descriptor.
>> Descriptor can be gained by simple open with O_PATH flag.
>> Socket node can be created by sys_mknod().
>>
>> Signed-off-by: Stanislav Kinsbursky <skinsbursky@...allels.com>
>> ---
>>    arch/x86/syscalls/syscall_32.tbl |    1 +
>>    arch/x86/syscalls/syscall_64.tbl |    1 +
>>    include/linux/syscalls.h         |    1 +
>>    kernel/sys_ni.c                  |    3 +++
>>    net/socket.c                     |   25 +++++++++++++++++++++++++
>>    5 files changed, 31 insertions(+), 0 deletions(-)
>>
>> diff --git a/arch/x86/syscalls/syscall_32.tbl b/arch/x86/syscalls/syscall_32.tbl
>> index 7a35a6e..9594b82 100644
>> --- a/arch/x86/syscalls/syscall_32.tbl
>> +++ b/arch/x86/syscalls/syscall_32.tbl
>> @@ -356,3 +356,4 @@
>>    347	i386	process_vm_readv	sys_process_vm_readv		compat_sys_process_vm_readv
>>    348	i386	process_vm_writev	sys_process_vm_writev		compat_sys_process_vm_writev
>>    349	i386	kcmp			sys_kcmp
>> +350	i386	fbind			sys_fbind
>
> i386 uses socketcalls... perhaps it shouldn't (socketcalls are pretty
> much an abomination), but for socketcall-based architectures this really
> should be a socketcall.
>

Thanks, Peter. I'll rework this.

> Don't you also need fconnect()?  Or is that simply handled by allowing
> open() without O_PATH?
>

Yes, I need it.
If this approach will be accepted, then I'll send one more patch set for fconnect.

> 	-hpa
>


-- 
Best regards,
Stanislav Kinsbursky
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