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From "Vinayakumar B (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7384) 'getfacl' command and 'getAclStatus' output should be in sync
Date Fri, 14 Nov 2014 19:23:34 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7384?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14212680#comment-14212680
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Vinayakumar B commented on HDFS-7384:
-------------------------------------

Thanks [~cnauroth] for the detailed explanation.

bq. At this point, we can't change the behavior of getAclStatus on the 2.x line for compatibility
reasons. Suppose a 2.6.0 deployment of the shell called getAclStatus on a 2.7.0 NameNode
Here we can implement this without breaking compatibility.
For ex: returned {{AclStatus}} can have default permissions in form of {{FsPermission}} object
itself, which would be optional field in protobuf.
So We can keep {{getAclEntries()}} return value as is, but in {{AclEntry}} we can add one
more field, 'effective action', either this can be calculated at client side itself, based
on the FsPermission object in AclStatus, or can be optional field set at NN side itself.

My basic intention is to avoid extra client side logic, which currently users have to do,
to find out the effective permission for an ACL entry.

If {{AclStatus}} contains {{FsPermission}} value, then we can create the same output as 'getfacl'
without having to do one more RPC to NN. This would keep the existing behavior of returning
empty entries for basic permissions, which was decided after so many discussions. 

Any thoughts?

> 'getfacl' command and 'getAclStatus' output should be in sync
> -------------------------------------------------------------
>
>                 Key: HDFS-7384
>                 URL: https://issues.apache.org/jira/browse/HDFS-7384
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Vinayakumar B
>            Assignee: Vinayakumar B
>
> *getfacl* command will print all the entries including basic and extended entries, mask
entries and effective permissions.
> But, *getAclStatus* FileSystem API will return only extended ACL entries set by the user.
But this will not include the mask entry as well as effective permissions.
> To benefit the client using API, better to include 'mask' entry and effective permissions
in the return list of entries.



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