From owner-freebsd-hackers@FreeBSD.ORG Tue May 26 12:59:33 2009 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id CE1DB1065678 for ; Tue, 26 May 2009 12:59:33 +0000 (UTC) (envelope-from kostjn@peterhost.ru) Received: from mail.z8.ru (mail.z8.ru [80.93.58.56]) by mx1.freebsd.org (Postfix) with ESMTP id 87B328FC1F for ; Tue, 26 May 2009 12:59:33 +0000 (UTC) (envelope-from kostjn@peterhost.ru) Received: from [85.235.196.139] (helo=kostjn.pht) by mail.z8.ru with esmtpa (Exim 4.67 (FreeBSD)) (envelope-from ) id 1M8wFe-000HCe-Vh for freebsd-hackers@freebsd.org; Tue, 26 May 2009 16:59:31 +0400 Message-ID: <4A1BE827.2030303@peterhost.ru> Date: Tue, 26 May 2009 17:01:27 +0400 From: Menshikov Konstantin User-Agent: Thunderbird 2.0.0.18 (X11/20090328) MIME-Version: 1.0 CC: freebsd-hackers@freebsd.org References: <4A1B8CF8.7030102@peterhost.ru> <20090526120313.GA1927@deviant.kiev.zoral.com.ua> <4A1BE1F8.9050804@peterhost.ru> <20090526123632.GB1927@deviant.kiev.zoral.com.ua> In-Reply-To: <20090526123632.GB1927@deviant.kiev.zoral.com.ua> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: Disk quota for Jail. Discussion. X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 26 May 2009 12:59:34 -0000 Kostik Belousov wrote: > On Tue, May 26, 2009 at 04:35:04PM +0400, Menshikov Konstantin wrote: > >> Kostik Belousov wrote: >> >>> On Tue, May 26, 2009 at 10:32:24AM +0400, Menshikov Konstantin wrote: >>> >>>> In structure prison it is added structures containing disk quotas and >>>> usage. >>>> At start Jail, we calculate the size root path and number of files in >>>> it, thus receiving current use of a disk. >>>> In functions of allocation of disk blocks and inode, we check quotas and >>>> we increase current use. >>>> >>>> >>> UFS cannot determine whether the new allocation goes under the jail >>> root or not. >>> >>> >> Yes. But jail cannot allocate block and inode above root path. In >> allocation functions, whether for example ffs_alloc we have access to >> ucred process and we can check up there is a process in jail. >> > > Yes, you can check this for jailed process. Think about non-jailed processes > that can do allocation below the jail root. > Processes out of jail are not considered. I do not understand, these processes have what relation to disk to quotas for jail. Please explain more in detail