Date: Tue, 16 Oct 2007 12:02:48 GMT From: P <pb@ludd.luth.spamsuck.se> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/117241: Stock i386/v6.0 nfs + cp -pRP cause corrupted files on destination volume. Message-ID: <200710161202.l9GC2mI6099667@www.freebsd.org> Resent-Message-ID: <200710161210.l9GCA2RW078444@freefall.freebsd.org>
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>Number: 117241 >Category: kern >Synopsis: Stock i386/v6.0 nfs + cp -pRP cause corrupted files on destination volume. >Confidential: no >Severity: serious >Priority: high >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Tue Oct 16 12:10:02 UTC 2007 >Closed-Date: >Last-Modified: >Originator: P >Release: 6.0-RELEASE #0 >Organization: >Environment: FreeBSD f6.my.domain 6.0-RELEASE FreeBSD 6.0-RELEASE #0: Thu Nov 3 09:36:13 UTC 2005 root@x64.samsco.home:/usr/obj/usr/src/sys/GENERIC i386 >Description: Mounting an nfs volume from a '6.2-RELEASE #0' machine with default settings. Cause some files (50%?) to miss the last block of the file. At least when copying gigabytes of data. Seems the destination file lenght is = int(source_filesize/512)*512. In the other direction (6.2 -> 6.0) there's no problem asfaik. I have not investigated this problem 100%. But I think it's serious enough that others should know. Maybe some test script should be written to test for this condition before releasing new versions? >How-To-Repeat: Proberbly setup machine1 with v6.0, and machine2 with v6.2. Then copy many files via default nfs from v6.0 disc to v6.2 nfs volume. pb@v60 ~ #cp -p img_8030.jpg /nfs62/ pb@v60 ~ #dir img_8030.jpg /nfs62/ -rw-r--r-- 1 pb wheel 3121562 Sep 24 2007 img_8030.jpg /nfs62/: -rw-r--r-- 1 pb wheel 3121152 Sep 24 2007 img_8030.jpg 3121562 / 512 = 6096.80078125 3121152 / 512 = 6096 3121562 % 512 = 410 3121152 % 512 = 0 >Fix: Use tar/pax/cpio etc.. + tcp pipes. Don't copy via nfs. >Release-Note: >Audit-Trail: >Unformatted:
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