From: "Bob Copeland" <me@bobcopeland.com>
To: "Maria Short" <mgolod@ieee.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Linux slack space question
Date: Fri, 8 Dec 2006 12:46:05 -0500 [thread overview]
Message-ID: <b6c5339f0612080946k57f9271fmdb8ed13ffefdf92b@mail.gmail.com> (raw)
In-Reply-To: <3c698a820612080921u20a957d9x1ac1e01e6734d025@mail.gmail.com>
On 12/8/06, Maria Short <mgolod@ieee.org> wrote:
> What I need is the code in the kernel that does that. I have been
> looking at http://lxr.linux.no/source/fs/ext3/inode.c but I could not
> find the specific code for partially filling the last block and
> placing an EOF at the end, leaving the rest to slack space.
There is no place where it writes an EOF. The size of the file is
stored in metadata (e.g. inode->i_size), and only the appropriate
number of blocks up to i_size are read or written to. Look at
ext3_get_block to see how blocks are read and allocated.
Bob
next prev parent reply other threads:[~2006-12-08 17:46 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-08 17:21 Maria Short
2006-12-08 17:46 ` Bob Copeland [this message]
2006-12-08 18:51 ` linux-os (Dick Johnson)
2006-12-11 17:30 ` Erik Mouw
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