linux-kernel - Re: [RFC][PATCH 2/2] first callers of process_deny

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Date:	Fri, 10 Oct 2008 12:17:15 +0200
From:	Cedric Le Goater <clg@...ibm.com>
To:	Dave Hansen <dave@...ux.vnet.ibm.com>
CC:	Oren Laadan <orenl@...columbia.edu>,
	containers@...ts.linux-foundation.org, Ingo Molnar <mingo@...e.hu>,
	linux-kernel@...r.kernel.org, arnd@...db.de
Subject: Re: [RFC][PATCH 2/2] first callers of process_deny_checkpoint()

> diff -puN ipc/mqueue.c~no-checkpointing-for-sockets ipc/mqueue.c
> --- linux-2.6.git/ipc/mqueue.c~no-checkpointing-for-sockets	2008-10-09 11:56:58.000000000 -0700
> +++ linux-2.6.git-dave/ipc/mqueue.c	2008-10-09 11:56:58.000000000 -0700
> @@ -14,6 +14,7 @@
>   */
>  
>  #include <linux/capability.h>
> +#include <linux/checkpoint.h>
>  #include <linux/init.h>
>  #include <linux/pagemap.h>
>  #include <linux/file.h>
> @@ -655,6 +656,8 @@ asmlinkage long sys_mq_open(const char _
>  	char *name;
>  	int fd, error;
>  
> +	process_deny_checkpointing(current);
> +

mqueue being a file system, i would put the checks in the inode_operations.

Also, you can't always deny ! I would expect some allow in sys_mq_unlink().

C.
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