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Bug#406902: marked as done (kernel-source: NFS data loss)

Your message dated Sat, 12 Sep 2009 10:09:22 +0200
with message-id <20090912080922.GC23835@inutil.org>
and subject line Re: Bug#406902 kernel NFS data loss
has caused the Debian Bug report #406902,
regarding kernel-source: NFS data loss
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
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immediately.)


-- 
406902: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=406902
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: kernel-source
Version: 2.6.8_16sarge6
Severity: important

Maybe this is related to http://bugs.debian.org/255931 (and concomitant
discussion on nfs@lists.sourceforge.net). I only guess that this is caused
by a "spurious" ESTALE error return.

Running on machine "rome", as "plain user" psz:

while :; do date; perl -e 'mkdir "tdir"; chdir "tdir"; open F, ">tscr"; print F "echo hello; sleep 2; /bin/pwd; echo bye\n"; close F; system "sh tscr"; mkdir("dir$_"),rmdir("dir$_") foreach 1..100; system "sh tscr"; unlink "tscr"; chdir ".."; rmdir "tdir"'; done

and (also on "rome"), as root:

while :; do date; lsof | grep psz | grep -E 'cwd|deleted|dir' | grep -v xterm; sleep 1; done

occasionally produces

Mon Jan 15 08:12:40 EST 2007
hello
/pisa/users/amstaff/psz/tdir
bye
shell-init: could not get current directory: getcwd: cannot access parent directories: No such file or directory
hello
/bin/pwd: cannot get current directory: No such file or directory
bye
Mon Jan 15 08:12:45 EST 2007
hello
/pisa/users/amstaff/psz/tdir
bye
hello
Mon Jan 15 08:12:48 EST 2007

Mon Jan 15 08:12:41 EST 2007
bash      13107      psz  cwd       DIR       0,15     8192    5800001 /pisa/users/amstaff/psz (pisa:/usr/users)
perl      13963      psz  cwd       DIR       0,15     4096    5800702 /pisa/users/amstaff/psz/tdir (pisa:/usr/users)
sh        13964      psz  cwd       DIR       0,15     4096    5800702 /pisa/users/amstaff/psz/tdir (pisa:/usr/users)
sh        13964      psz  255r      REG       0,15       40    5800712 /pisa/users/amstaff/psz/tdir/tscr (pisa:/usr/users)
sleep     13965      psz  cwd       DIR       0,15     4096    5800702 /pisa/users/amstaff/psz/tdir (pisa:/usr/users)
Mon Jan 15 08:12:42 EST 2007
bash      13107      psz  cwd       DIR       0,15     8192    5800001 /pisa/users/amstaff/psz (pisa:/usr/users)
perl      13963      psz  cwd   unknown       0,15                     /pisa/users/amstaff/psz/tdir (pisa:/usr/users)
Mon Jan 15 08:12:44 EST 2007
bash      13107      psz  cwd       DIR       0,15     8192    5800001 /pisa/users/amstaff/psz (pisa:/usr/users)
perl      13963      psz  cwd   unknown       0,15                     /pisa/users/amstaff/psz/tdir (deleted) (pisa:/usr/users)
sh        13984      psz  cwd   unknown       0,15                     /pisa/users/amstaff/psz/tdir (deleted) (pisa:/usr/users)
sh        13984      psz  255r      REG       0,15       40    5800712 /pisa/users/amstaff/psz/tdir/tscr (pisa:/usr/users)
sleep     13985      psz  cwd   unknown       0,15                     /pisa/users/amstaff/psz/tdir (deleted) (pisa:/usr/users)
Mon Jan 15 08:12:45 EST 2007
bash      13107      psz  cwd       DIR       0,15     8192    5800001 /pisa/users/amstaff/psz (pisa:/usr/users)
perl      13995      psz  cwd       DIR       0,15     4096    5800702 /pisa/users/amstaff/psz/tdir (pisa:/usr/users)
sh        13996      psz  cwd       DIR       0,15     4096    5800702 /pisa/users/amstaff/psz/tdir (pisa:/usr/users)
sh        13996      psz  255r      REG       0,15       40    5800712 /pisa/users/amstaff/psz/tdir/tscr (pisa:/usr/users)
sleep     13997      psz  cwd       DIR       0,15     4096    5800702 /pisa/users/amstaff/psz/tdir (pisa:/usr/users)
Mon Jan 15 08:12:46 EST 2007

Settings:

rome# grep psz /etc/passwd
psz:x:1001:1001:Paul Szabo:/users/amstaff/psz:/bin/bash
rome# ls -l /users/amstaff
lrwxrwxrwx  1 root root 19 Jan 19  2005 /users/amstaff -> /pisa/users/amstaff
rome# mount | grep pisa/users
pisa:/usr/users on /pisa/users type nfs (rw,bg,rsize=8192,wsize=8192,addr=129.78.69.136)

(pisa uses default root_squash in its /etc/exports).

Cheers,

Paul Szabo   psz@maths.usyd.edu.au   http://www.maths.usyd.edu.au/u/psz/
School of Mathematics and Statistics   University of Sydney    Australia


-- System Information:
Debian Release: 3.1
Architecture: i386 (i686)
Kernel: Linux 2.6.8-spm1.7
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)

--- End Message ---
--- Begin Message --- 
On Fri, Sep 11, 2009 at 03:30:00PM +1000, psz@maths.usyd.edu.au wrote:
> Dear Moritz,
> 
> > Can you give us a status update please? Is this fixed upstream
> > in the mean time? If not, did you submit your patches and was
> > there any feedback?
> 
> I believe this issue has been "fixed upstream", as per comment
> http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=406902#29
> I guess they did not use "my" patches to fs/exportfs/expfs.c, but
> arrived at the same change independently: I have only sent those
> patches to this Debian bug (not to any other forums).
> 
> You may close this bug.

Thanks for the feedback, closing.

Cheers,
        Moritz

--- End Message ---
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