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Date: Fri, 09 Aug 2013 11:05:43 +0800
From: Julian Elischer <julian@freebsd.org>
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To: Don Lewis <truckman@FreeBSD.org>
Subject: Re: Reliable process tracking
References: <201308090301.r7931XDc059355@gw.catspoiler.org>
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On 8/9/13 11:01 AM, Don Lewis wrote:
> On  9 Aug, Julian Elischer wrote:
>
>> I've been pondering the possibility of appending a universe (jail)
>> number to the
>> UIDS, PIDS and various other things. (classes maybe?).
>>
>> It wouldn't have to be everywhere, but ther eare a number of places
>> where comparisons would
>> DTRT if they were comparing "my_jail+my_uid" with "his_jail+his_uid",
>> instead of just the UIDs.
>> It would also help with the "multiple roots" problem, and might
>> simplify some of the current code.
> If that's all you want, then why not just compare
> 	proc1->p_fd->fd_jdir to proc2->p_fd->fd_jdir
> for the jail check?
>
>
>
because multiple jails can have the same root directory?

there are other tests one can do too, if one is willing to do multiple 
tests everywhere.