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https://issues.apache.org/jira/browse/HDFS-6962?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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John Zhuge updated HDFS-6962:
-----------------------------
    Attachment: HDFS-6962.007.patch

[~cnauroth] and [~eddyxu] Please review patch 007.

Diff from 006:
* Add CLI tests {{TestAclCLIWithPosixAclInheritance}} based on {{TestAclCLI}}
* No longer add field {{createModes}} to {{INodeWithAdditionalFields}}. 
Instead, add new feature {{CreateModesFeature}} to store create modes. In this 
way, no penalty when POSIX ACL inheritance is disable or for any inode not 
associated with a create request.
* Remove the feature {{CreateModesFeature}} once default ACL has been processed.
* There is added cost of adding and removing the new feature.

TODO:
* Support webhdfs

> ACLs inheritance conflict with umaskmode
> ----------------------------------------
>
>                 Key: HDFS-6962
>                 URL: https://issues.apache.org/jira/browse/HDFS-6962
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: security
>    Affects Versions: 2.4.1
>         Environment: CentOS release 6.5 (Final)
>            Reporter: LINTE
>            Assignee: John Zhuge
>            Priority: Critical
>              Labels: hadoop, security
>         Attachments: HDFS-6962.001.patch, HDFS-6962.002.patch, 
> HDFS-6962.003.patch, HDFS-6962.004.patch, HDFS-6962.005.patch, 
> HDFS-6962.006.patch, HDFS-6962.007.patch, HDFS-6962.1.patch, 
> disabled_new_client.log, disabled_old_client.log, enabled_new_client.log, 
> enabled_old_client.log, run
>
>
> In hdfs-site.xml 
> <property>
>     <name>dfs.umaskmode</name>
>     <value>027</value>
> </property>
> 1/ Create a directory as superuser
> bash# hdfs dfs -mkdir  /tmp/ACLS
> 2/ set default ACLs on this directory rwx access for group readwrite and user 
> toto
> bash# hdfs dfs -setfacl -m default:group:readwrite:rwx /tmp/ACLS
> bash# hdfs dfs -setfacl -m default:user:toto:rwx /tmp/ACLS
> 3/ check ACLs /tmp/ACLS/
> bash# hdfs dfs -getfacl /tmp/ACLS/
> # file: /tmp/ACLS
> # owner: hdfs
> # group: hadoop
> user::rwx
> group::r-x
> other::---
> default:user::rwx
> default:user:toto:rwx
> default:group::r-x
> default:group:readwrite:rwx
> default:mask::rwx
> default:other::---
> user::rwx | group::r-x | other::--- matches with the umaskmode defined in 
> hdfs-site.xml, everything ok !
> default:group:readwrite:rwx allow readwrite group with rwx access for 
> inhéritance.
> default:user:toto:rwx allow toto user with rwx access for inhéritance.
> default:mask::rwx inhéritance mask is rwx, so no mask
> 4/ Create a subdir to test inheritance of ACL
> bash# hdfs dfs -mkdir  /tmp/ACLS/hdfs
> 5/ check ACLs /tmp/ACLS/hdfs
> bash# hdfs dfs -getfacl /tmp/ACLS/hdfs
> # file: /tmp/ACLS/hdfs
> # owner: hdfs
> # group: hadoop
> user::rwx
> user:toto:rwx   #effective:r-x
> group::r-x
> group:readwrite:rwx     #effective:r-x
> mask::r-x
> other::---
> default:user::rwx
> default:user:toto:rwx
> default:group::r-x
> default:group:readwrite:rwx
> default:mask::rwx
> default:other::---
> Here we can see that the readwrite group has rwx ACL bu only r-x is effective 
> because the mask is r-x (mask::r-x) in spite of default mask for inheritance 
> is set to default:mask::rwx on /tmp/ACLS/
> 6/ Modifiy hdfs-site.xml et restart namenode
> <property>
>     <name>dfs.umaskmode</name>
>     <value>010</value>
> </property>
> 7/ Create a subdir to test inheritance of ACL with new parameter umaskmode
> bash# hdfs dfs -mkdir  /tmp/ACLS/hdfs2
> 8/ Check ACL on /tmp/ACLS/hdfs2
> bash# hdfs dfs -getfacl /tmp/ACLS/hdfs2
> # file: /tmp/ACLS/hdfs2
> # owner: hdfs
> # group: hadoop
> user::rwx
> user:toto:rwx   #effective:rw-
> group::r-x      #effective:r--
> group:readwrite:rwx     #effective:rw-
> mask::rw-
> other::---
> default:user::rwx
> default:user:toto:rwx
> default:group::r-x
> default:group:readwrite:rwx
> default:mask::rwx
> default:other::---
> So HDFS masks the ACL value (user, group and other  -- exepted the POSIX 
> owner -- ) with the group mask of dfs.umaskmode properties when creating 
> directory with inherited ACL.



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