Bug 1165093 - nfs mount via symlinks cross the volume and comes back again to same will fai
Summary: nfs mount via symlinks cross the volume and comes back again to same will fai
Keywords:
Status: CLOSED WONTFIX
Alias: None
Product: Red Hat Gluster Storage
Classification: Red Hat Storage
Component: gluster-nfs
Version: rhgs-3.0
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
: ---
Assignee: Niels de Vos
QA Contact: storage-qa-internal@redhat.com
URL:
Whiteboard:
Depends On:
Blocks: 1164227
TreeView+ depends on / blocked
 
Reported: 2014-11-18 10:25 UTC by Jiffin
Modified: 2016-01-29 12:19 UTC (History)
4 users (show)

Fixed In Version:
Doc Type: Enhancement
Doc Text:
Cause: The symbolic link which points path outside exported volume is treated as bad symlinks.So when a symlink goes out of the file system , we just stop resolving the symlink and returns an error, but if symlinks returns to exported volume again , right now we do not consider them. Consequence: The code haven't direct access to directories which is outside the file system. By this fix, code may get indirect access to outside of the exported volume. Workaround (if any): Need to resolve the symlink until the path pointed by the symlink completes. Result: The mount using symlink which crosses the file system boundary and comes again will work.
Clone Of:
Environment:
Last Closed: 2016-01-29 12:19:38 UTC
Embargoed:

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Description Jiffin 2014-11-18 10:25:32 UTC 
Description of problem:

NFS mount via symlinks crosses the volume(boundary of file system) and comes back again to same will fail where as in kernel nfs it works fine. 

For example,
Consider a volume test which contains,
1.)a directory dir
2.)symlink1 points to ../vol/dir
3.)symlink2 points to ../xyz/../vol/dir 

Mount fails for symlink1 and symlink2

Version-Release number of selected component (if applicable):
mainline

How reproducible:
always


Actual results:
Mount fails retuning access denied.

Expected results:
Mount should happen

Additional info:
Kernel nfs is resolving mount path correctly
Comment 2 Soumya Koduri 2016-01-29 12:19:38 UTC 
In Gluster, symlinks cannot be resolved outside its namespace. So this is working as expected. Closing the bug.
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