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From "Raghu Angadi (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-1298) adding user info to file
Date Tue, 11 Sep 2007 17:49:33 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-1298?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12526538
] 

Raghu Angadi commented on HADOOP-1298:
--------------------------------------

Regd locking : Right now there is no protection around accesses to Namespace for permission
checking. The usual structure for an operation in the patch is :
{code}
checkPermission(path, DELETE); // required access is READ, WRITE etc
delete(path); // or open, etc
{code}
Here {{delete()}} is same as before, which locks the namespace. 

I think it could be something like :
{code}
delete() {
 // same as before except, just before deleting :
 checkPermission(INode.permissions, DELETE);
  //...
}
{code}
This ensures access checking an action are consistent. 

> adding user info to file
> ------------------------
>
>                 Key: HADOOP-1298
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1298
>             Project: Hadoop
>          Issue Type: New Feature
>          Components: dfs, fs
>            Reporter: Kurtis Heimerl
>            Assignee: Christophe Taton
>             Fix For: 0.15.0
>
>         Attachments: 1298_2007-09-06b.patch, 1298_2007-09-07g.patch, hadoop-user-munncha.patch17
>
>
> I'm working on adding a permissions model to hadoop's DFS. The first step is this change,
which associates user info with files. Following this I'll assoicate permissions info, then
block methods based on that user info, then authorization of the user info. 
> So, right now i've implemented adding user info to files. I'm looking for feedback before
I clean this up and make it offical. 
> I wasn't sure what release, i'm working off trunk. 

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