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btrfs: fix perms on demonstration debugfs interface

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btrfs provides a helpful demonstration of how to export
a global variable via debugfs; however, it is unique among
other debugfs files in that it is world-writable, which causes
some concern to people who are not familiar with its purpose.

Fix it so that it is only user-writable.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Eric Sandeen 2016-08-31 16:49:29 -05:00 committed by David Sterba
parent c79a175175
commit 07f6a48043
1 changed files with 1 additions and 1 deletions
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2
fs/btrfs/sysfs.c
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@ -836,7 +836,7 @@ static int btrfs_init_debugfs(void)
if (!btrfs_debugfs_root_dentry)
return -ENOMEM;
debugfs_create_u64("test", S_IRUGO | S_IWUGO, btrfs_debugfs_root_dentry,
debugfs_create_u64("test", S_IRUGO | S_IWUSR, btrfs_debugfs_root_dentry,
&btrfs_debugfs_test);
#endif
return 0;