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Bug 847944

Summary: nfs_attr_use_mounted_on_file() returns wrong value [rhel-6.2.z]
Product: Red Hat Enterprise Linux 6 Reporter: RHEL Program Management <pm-rhel>
Component: kernelAssignee: Frantisek Hrbata <fhrbata>
Status: CLOSED ERRATA QA Contact: Jian Li <jiali>
Severity: high Docs Contact:
Priority: urgent    
Version: 6.4CC: cww, dhoward, eguan, jiali, jlayton, nfs-maint, nmurray, pm-eus, rwheeler, steved
Target Milestone: rcKeywords: ZStream
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: kernel-2.6.32-220.26.1.el6 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2012-09-11 17:34:02 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 842312    
Bug Blocks:    

Description RHEL Program Management 2012-08-14 07:14:07 UTC 
This bug has been copied from bug #842312 and has been proposed
to be backported to 6.2 z-stream (EUS).
Comment 7 Jian Li 2012-09-09 17:15:20 UTC 
I try to test this bug as (https://bugzilla.redhat.com/show_bug.cgi?id=842312#c13), but, kenrel-2.6.32-220.26.1.el6 diff from 2.6.32.293, so I couldn't only reproducer it in pre-patch kernel. In post-patch kernel, server are not able to work with fault-inject newpynfs. 

Because, kernel wouldn't fetch fs_locations which make (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL==1) when nfs_fhget is called which call nfs_attr_use_mounted_on_fileid. in fact, nfs_attr_use_mounted_on_fileid always return 0, whatever fattr4_mounted_on_file is used. If fattr4_fileid is not, nfs client couldn't create the inode for server's file, just as test result showed.

 44     if (((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) == 0) ||
 45          ((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0))

Jeff, please check if I could verify this bug?
Comment 9 errata-xmlrpc 2012-09-11 17:34:02 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHBA-2012-1254.html