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From "Charles Lamb (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6375) Listing extended attributes with the search permission
Date Mon, 19 May 2014 23:07:39 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6375?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14002550#comment-14002550
] 

Charles Lamb commented on HDFS-6375:
------------------------------------

This is a clarification of the initial comment at the top of this Jira.

>From the attr(5) manpage:

{noformat}
       Users with search access to a file or directory may retrieve a list  of
       attribute names defined for that file or directory.
{noformat}

This statement is somewhat ambiguous in that it doesn't specify whether the search access
is to the file or directory on which the extended attributes exist or the parent directory
of the file/directory (on which the extended attributes exist). It turns out that when one
tries out extended attribute commands on ext4, it's the latter. e.g. if you have /mydir/myfile
and you have extended attributes on myfile, then you need to have search access to myfile
in mydir.


> Listing extended attributes with the search permission
> ------------------------------------------------------
>
>                 Key: HDFS-6375
>                 URL: https://issues.apache.org/jira/browse/HDFS-6375
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: namenode
>    Affects Versions: HDFS XAttrs (HDFS-2006)
>            Reporter: Andrew Wang
>            Assignee: Charles Lamb
>         Attachments: HDFS-6375.1.patch, HDFS-6375.2.patch, HDFS-6375.3.patch, HDFS-6375.4.patch
>
>
> From the attr(5) manpage:
> {noformat}
>        Users with search access to a file or directory may retrieve a list  of
>        attribute names defined for that file or directory.
> {noformat}
> This is like doing {{getfattr}} without the {{-d}} flag, which we currently don't support.



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