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From "Brian Bloniarz (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-1841) Enforce read-only permissions in FUSE open()
Date Fri, 15 Apr 2011 19:44:05 GMT
Enforce read-only permissions in FUSE open()
--------------------------------------------

                 Key: HDFS-1841
                 URL: https://issues.apache.org/jira/browse/HDFS-1841
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: contrib/fuse-dfs
    Affects Versions: 0.20.2
         Environment: Linux 2.6.35
            Reporter: Brian Bloniarz
            Priority: Minor


fuse-dfs currently allows files to be created on a read-only filesystem:

$ fuse_dfs_wrapper.sh dfs://example.com:8020 ro ~/hdfs
$ touch ~/hdfs/foobar

Attached is a simple patch, which does two things:
1) Checks the read_only flag inside dfs_open().
2) Passes the read-only mount option to FUSE when ro is specified on the commandline. This
is probably a better long-term solution; the kernel will enforce the read-only operations
without it being necessary inside the client.

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