Re: [PATCH RFC 09/12] userns: Convert ocfs2 to use kuid and kgid where appropriate

Joel Becker
2012-11-21T19:51:24Z

On Tue, Nov 20, 2012 at 04:43:37AM -0800, Eric W. Biederman wrote:
> --- a/fs/ocfs2/file.c
> +++ b/fs/ocfs2/file.c
> @@ -1116,7 +1116,8 @@ int ocfs2_setattr(struct dentry *dentry, struct iattr *attr)
> (unsigned long long)OCFS2_I(inode)->ip_blkno,
> dentry->d_name.len, dentry->d_name.name,
> attr->ia_valid, attr->ia_mode,
> - attr->ia_uid, attr->ia_gid);
> + from_kuid(&init_user_ns, attr->ia_uid),
> + from_kgid(&init_user_ns, attr->ia_gid));

Dear Eric,
I have a similar question about init_user_ns to Dave. As far as
I can tell, using init_user_ns here means we'll never get translations
based on the current process namespace. It just so happens that
include/linux/user_namespace.h doesn't allow new namespaces yet, but I
can't see why we would propagate that knowledge elsewhere.
Is there some magic about when init_user_ns should be used
regardless?

Joel

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