On Oct 15, 2008, at 11:31 AM, Steve Dickson wrote:
Chuck Lever wrote:
On Oct 9, 2008, at Oct 9, 2008, 11:48 AM, Steve Dickson wrote:
Unfortunately, I'm failing miserably on reproducing this... Here is
what I've done:
Chuck Lever wrote:
Hi Steve-
As I understand it, the documented bug refers to running nfs-
utils 1.1.3
on kernels older than 2.6.22.
I created a Fedora 7 KVM guest that runs a 2.6.21 kernel. I
installed
the nfs-utils-1.1.3 (F-10) package along with supporting packages
(libgssglue, librpcsecgss and libnfsidmap). I did both mount
commands
mount -o sec=none madhat:/home /mnt/home
mount -o sec=sys madhat:/home /mnt/home
and was able to write to both mount points.
bcwong's patch changes the server side too. Have you tried
mounting a
server running an old version of nfs-utils?
Well it turns out bcwong's patch was rewritten by the following patch:
commit 603017f2c1587d760e2649b889b581ca267ffee7
Author: J. Bruce Fields <[EMAIL PROTECTED]>
Date: Thu Aug 28 11:23:05 2008 -0400
Determine supported pseudoflavors from export
Instead of using a static list of supported flavors, we should be
taking
the list from the export.
Signed-off-by: J. Bruce Fields <[EMAIL PROTECTED]>
So this might be the problem... but....
To reproduce this you need to force the use of the legacy mount
command
that parses mount options in user space and passes a binary data
structure to the kernel via mount(2).
If this the case, we need a legacy mount command, then how can it
be a
bug in nfs-utils-1.1.3?
Easy... the mount.nfs subcommand in nfs-utils-1.1.3 switches to
legacy
mode on old kernels (pre 2.6.23). What I meant by "you need to force
the use of the legacy mount command" is that you need to force the
use
of the legacy binary mount interface.
I have tried a legacy FC-5 mount binary (util-linux 2.13-pre7) on
both a 2.6.21 kernel (FC-7) and a 2.6.25.14 kernel (F-9) mounting a
F-10 server running nfs-utils-1.1.3 with out a problem.
Right, the old mount binaries don't have bcwong's fix, so they are not
broken.
The combination you need is an nfs-utils 1.1.3 mount command on an old
kernel (or just wire the new mount command to use the legacy interface
all the time).
One oddity the mount binary fails when I used the '-o sec=none' flag
with:
Warning: Unrecognized security flavor none.
Try "null" maybe?
Bad nfs mount parameter: sec
So something else has to be going on here....
--
Chuck Lever
chuck[dot]lever[at]oracle[dot]com
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