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https://issues.apache.org/jira/browse/HDFS-6556?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14046884#comment-14046884
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Hudson commented on HDFS-6556:
------------------------------
FAILURE: Integrated in Hadoop-Mapreduce-trunk #1815 (See
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1815/])
HDFS-6556. Refine XAttr permissions. Contributed by Uma Maheswara Rao G.
(umamahesh:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1606320)
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/fs/XAttr.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/XAttrPermissionFilter.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDFSShell.java
> Refine XAttr permissions
> ------------------------
>
> Key: HDFS-6556
> URL: https://issues.apache.org/jira/browse/HDFS-6556
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 2.5.0
> Reporter: Yi Liu
> Assignee: Uma Maheswara Rao G
> Fix For: 3.0.0, 2.5.0
>
> Attachments: RefinedPermissions-HDFS-6556-1.patch,
> RefinedPermissions-HDFS-6556.patch, refinedPermissions-HDFS-6556-2.patch,
> refinedPermissions-HDFS-6556-3.patch
>
>
> After discuss with Uma, we should refine setting permissions of {{user}} and
> {{trusted}} namespace xattrs.
> *1.* For {{user}} namespace xattrs, In HDFS-6374, says "setXAttr should
> require the user to be the owner of the file or directory", we have a bit
> misunderstanding. It actually is:
> {quote}
> The access permissions for user attributes are defined by the file permission
> bits. only regular files and directories can have extended attributes. For
> sticky directories, only the owner and privileged user can write attributes.
> {quote}
> We can refer to linux source code in
> http://lxr.free-electrons.com/source/fs/xattr.c?v=2.6.35
> I also check in linux, it's controlled by the file permission bits for
> regular files and directories (not sticky).
> *2.* For {{trusted}} namespace, currently we require the user should be owner
> and superuser. Actually superuser is enough.
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