Bug 431477 - mounting gets stale fh when exporting filesystems without a fsid= option
mounting gets stale fh when exporting filesystems without a fsid= option
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: nfs-utils (Show other bugs)
All Linux
urgent Severity urgent
: rc
: ---
Assigned To: Steve Dickson
: Regression
Depends On:
  Show dependency treegraph
Reported: 2008-02-04 16:18 EST by Jeff Layton
Modified: 2014-06-18 03:37 EDT (History)
5 users (show)

See Also:
Fixed In Version: RHBA-2008-0408
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2008-05-21 11:15:47 EDT
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
patch -- only apply fsid related checks in nfsd_fh when fsidtype == 1 (355 bytes, patch)
2008-02-04 16:18 EST, Jeff Layton
no flags Details | Diff
purposed RHEL5 patch (762 bytes, patch)
2008-02-06 10:36 EST, Steve Dickson
no flags Details | Diff

  None (edit)
Description Jeff Layton 2008-02-04 16:18:37 EST
Export a filesystem like this from a rhel5 box with current nfs-utils (I'm using
-30.el5, not sure exactly when this was broken):

/export                 *(rw,nohide,insecure,no_root_squash)

...then try to mount from a client:

# mount server:/export /mnt/rhel5
mount: Stale NFS file handle

...what's happening is that the auth.unix.ip and nfsd.export upcalls are working
correctly, but the nfsd.fh upcall fails to match the export and tell the kernel
to which path the filehandle corresponds. So the kernel ends up returning a
stale FH error back to the client.

The problem is a bad check in nfsd_fh. Patch to fix this follows. Frank Filz
from IBM mentioned the same patch in bug 315401 (along with a few others). He
mentioned that he had posted it to the list, but I can't seem to find it. The
problem also seems to extend beyond exports with crossmnt set.
Comment 1 Jeff Layton 2008-02-04 16:18:37 EST
Created attachment 293942 [details]
patch -- only apply fsid related checks in nfsd_fh when fsidtype == 1
Comment 2 Jeff Layton 2008-02-04 16:30:54 EST
Looks like the regression was probably introduced in:


Steve -- does the patch in comment #1 look OK?
Comment 4 Steve Dickson 2008-02-06 10:36:21 EST
Created attachment 294114 [details]
purposed  RHEL5 patch
Comment 6 Steve Dickson 2008-02-06 12:43:12 EST
fixed in nfs-utils-1.0.9-31.el5
Comment 10 errata-xmlrpc 2008-05-21 11:15:47 EDT
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.


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