From: "Rohit Sharma" Subject: Re: block allocation for ext2_mkdir Date: Fri, 19 Dec 2008 13:12:32 +0530 Message-ID: <2d08ef090812182342p1a210adcgd70d8a5cf3bf828c@mail.gmail.com> References: <2d08ef090812181042k2b15f27fke39076cc72453797@mail.gmail.com> <2d08ef090812181152r53fa9d18j1b21310c4e592f@mail.gmail.com> <20081218223928.GA20092@atrey.karlin.mff.cuni.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: Kernelnewbies , ext4 To: "Jan Kara" Return-path: Received: from rv-out-0506.google.com ([209.85.198.234]:38791 "EHLO rv-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752748AbYLSHmd (ORCPT ); Fri, 19 Dec 2008 02:42:33 -0500 Received: by rv-out-0506.google.com with SMTP id k40so793051rvb.1 for ; Thu, 18 Dec 2008 23:42:32 -0800 (PST) In-Reply-To: <20081218223928.GA20092@atrey.karlin.mff.cuni.cz> Content-Disposition: inline Sender: linux-ext4-owner@vger.kernel.org List-ID: On Fri, Dec 19, 2008 at 4:09 AM, Jan Kara wrote: >> On Fri, Dec 19, 2008 at 12:12 AM, Rohit Sharma wrote: >> > How does ext2 allocate blocks for directory. >> > >> > ext2_mkdir calls ext2_make_empty >> > >> > ext2_make_empty calls __ext2_write_begin >> > >> > __ ext2_write_begin calls block_write_begin >> > >> > my query is that how does this function allocates blocks for directories. ?? >> > >> >> Does ext2 uses ext2_get_block to allocate blocks for both files and >> directories. ?? > Yes, exactly. Ext2 (unlike ext3 or ext4) treats directories the same > ways as ordinary files and thus ext2_get_block is used for block > allocation. > Can i modify this function to restrict allocation of blocks to a particular block group ? Like i want that my abc.txt file should be in block group 5 suppose, then what should i do? > Honza > > -- > Jan Kara > SuSE CR Labs >