From owner-freebsd-bugs  Sun Dec 30  7: 0:20 2001
Delivered-To: freebsd-bugs@hub.freebsd.org
Received: from freefall.freebsd.org (freefall.FreeBSD.org [216.136.204.21])
	by hub.freebsd.org (Postfix) with ESMTP id C8C9F37B447
	for <freebsd-bugs@hub.freebsd.org>; Sun, 30 Dec 2001 07:00:03 -0800 (PST)
Received: (from gnats@localhost)
	by freefall.freebsd.org (8.11.6/8.11.6) id fBUF03m38142;
	Sun, 30 Dec 2001 07:00:03 -0800 (PST)
	(envelope-from gnats)
Date: Sun, 30 Dec 2001 07:00:03 -0800 (PST)
Message-Id: <200112301500.fBUF03m38142@freefall.freebsd.org>
To: freebsd-bugs@FreeBSD.org
Cc: 
From: Sheldon Hearn <sheldonh@starjuice.net>
Subject: Re: bin/31692: ntfs and sendfile problem (corrupted data) 
Reply-To: Sheldon Hearn <sheldonh@starjuice.net>
Sender: owner-freebsd-bugs@FreeBSD.ORG
Precedence: bulk
List-ID: <freebsd-bugs.FreeBSD.ORG>
List-Archive: <http://docs.freebsd.org/mail/> (Web Archive)
List-Help: <mailto:majordomo@FreeBSD.ORG?subject=help> (List Instructions)
List-Subscribe: <mailto:majordomo@FreeBSD.ORG?subject=subscribe%20freebsd-bugs>
List-Unsubscribe: <mailto:majordomo@FreeBSD.ORG?subject=unsubscribe%20freebsd-bugs>
X-Loop: FreeBSD.org

The following reply was made to PR bin/31692; it has been noted by GNATS.

From: Sheldon Hearn <sheldonh@starjuice.net>
To: freebsd-gnats-submit@FreeBSD.org
Cc:  
Subject: Re: bin/31692: ntfs and sendfile problem (corrupted data) 
Date: Sun, 30 Dec 2001 16:56:22 +0200

 Followup confirming that the problem is sendfile(2)-specific.
 
 Ciao,
 Sheldon.
 
 ----- Original Message -----
 
 Date:  Sun, 30 Dec 2001 15:47:45 +0100 (CET)
 From:  Michal Mertl <mime@traveller.cz>
 To:  Sheldon Hearn <sheldonh@starjuice.net>
 cc:  current@freebsd.org
 Subject:  Re: ntfs and sendfile problem (corrupted data) 
 
 
 > On Sun, 30 Dec 2001, Sheldon Hearn wrote:
 > 
 > >
 > >
 > > On Sun, 30 Dec 2001 01:53:08 +0100, Michal Mertl wrote:
 > >
 > > > I have ntfs partition mounted ro on current. I can read from it without
 > > > problems. But I noticed I get corrupted data (the corrupted file has
 > > > right size but contains mostly zeros) when using ftpd to read them.
 > > >
 > > > I'm pretty sure the problem is thus in sendfile(2) and/or ntfs fs support.
 > >
 > > See also PR bin/31692, which reports simmilar problems using ftpd and
 > > smbfs.  See my request for feedback, which ought to help verify that
 > > it's sendfile(2) causing the problem.
 > >
 > 
 > I did use the "goto oldway;" and the problem went away. I tried to look at
 > /sys/kern/uipc_syscalls.c sendfile implementation but it is too complex
 > for me :-(. I tried ktrace on ftpd but only saw the call to sendfile(2).
 > If you give me some guidance I can try to look into problem deeper. I
 > don't have any experience in kernel debugging but would like to learn it.
 > 
 > 
 > 
 > > Ciao,
 > > Sheldon.
 > >
 > 
 > -- 
 > Michal Mertl
 > mime@traveller.cz
 
 > 
 

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-bugs" in the body of the message