linux-kernel - Re: [RFC] catching sys

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Message-ID: <4E42EEE3.9050608@free.fr>
Date:	Wed, 10 Aug 2011 22:49:39 +0200
From:	Daniel Lezcano <daniel.lezcano@...e.fr>
To:	Bruno Prémont <bonbons@...ux-vserver.org>
CC:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	LXC Development <Lxc-devel@...ts.sourceforge.net>,
	containers@...ts.linux-foundation.org
Subject: Re: [RFC] catching sys_reboot syscall

On 08/10/2011 10:10 PM, Bruno Prémont wrote:
> Hi Daniel,
>
> [I'm adding containers ml as we had a discussion there some time ago
>  for this feature]

[ ... ]

>> +    if (cmd == LINUX_REBOOT_CMD_RESTART2)
>> +        if (strncpy_from_user(&buffer[0], arg, sizeof(buffer) - 1) < 0)
>> +            return -EFAULT;
>> +
>> +    /* If we are not in the initial pid namespace, we send a signal
>> +     * to the parent of this init pid namespace, notifying a shutdown
>> +     * occured */
>> +    if (pid_ns != &init_pid_ns)
>> +        pid_namespace_reboot(pid_ns, cmd, buffer);
> Should there be a return here?
> Or does pid_namespace_reboot() never return by submitting signal to
> parent?

Yes, it does not return a value, like 'do_notify_parent_cldstop'

Thanks
   -- Daniel
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