tar fails on FreeBSD 7 and passes on FreeBSD 6 for the same input

[David Wolfskill]

On Tue, Jan 20, 2009 at 01:24:41PM +0530, chandra reddy wrote:
> Hi,
> 
> I am getting the following error when i run tar on a directory.
> 
> [chandra at home]$ tar  zcf config-xsl.tar  config-xsl/9.6
> 
> tar: Cannot open directory
> config-xsl/9.6/configuration/protocols/mpls/label-switched-path/oam/bfd-liveness-detection/detection-time:
> No such file or directory
> tar: Cannot open directory
> ...
> FreeBSD chandra 7.1-RC1 FreeBSD 7.1-RC1 #0: Sun Dec  7 05:57:33 UTC 2008
> root at logan.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC  i386
> I have debugged libc and found that  system call "fstafs" is failing and
> returning -1.

I believe you will find that the system call is "fstatfs".
 
> Can any one help me what is the real problem here and how to fix it?

A subsequent message of your verified that the hierarchy being read was
on an NFS-mounted file system.  Perchance, was that NFS mount managwed
by amd(8)?

If so, while I do not have a "fix" for you, I am relieved to see someone
else finally report these symptoms.  Please see
<http://docs.FreeBSD.org/cgi/mid.cgi?20081203001538.GC96383> for an
archived copy of my initial message in a thread reporting this.

There is additional detail (including kernel trace information &
how-to-repeat instructions) in subsequent messages in the thread.  Also
mentioned is a circumvention -- basically, crippling amd(8) so it no
longer attempts to unmount() a file system.

However, I was unable to re-create the symptoms at home -- only at work.
A colleague at work was able to re-create the symptoms, and was
intending to experiment a bit more, but he's been busy with other things
recently.

Please contact me (off-list, if you prefer), and we can discuss
additional details.

Peace,
david
-- 
David H. Wolfskill				david at catwhisker.org
Depriving a girl or boy of an opportunity for education is evil.

See http://www.catwhisker.org/~david/publickey.gpg for my public key.
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