[RFC][PATCH] ns: Syscalls for better namespace sharing control.

[Pavel Emelyanov]

Eric W. Biederman wrote:
> Pavel Emelyanov <xemul at parallels.com> writes:
> 
>>> +static struct inode *nsfd_mkinode(void)
>>> +{
>>> +	struct inode *inode;
>>> +	inode = new_inode(nsfd_mnt->mnt_sb);
>>> +	if (!inode)
>>> +		return ERR_PTR(-ENOMEM);
>>> +
>>> +	inode->i_fop = &nsfd_file_operations;
>>> +
>>> +	/*
>>> +	 * Mark the inode dirty from the very beginning,
>>> +	 * that way it will never be moved to the dirty
>>> +	 * list because mark_inode_dirty() will think that
>>> +	 * it already _is_ on the dirty list.
>>> +	 */
>>> +	inode->i_state = I_DIRTY;
>>> +	inode->i_mode = S_IRUSR | S_IWUSR;
>>> +	inode->i_uid = current_fsuid();
>>> +	inode->i_gid = current_fsgid();
>>> +	inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
>>> +	return inode;
>>> +}
>> Why not use anon inodes?
> 
> Because you can't mount them anywhere.

Worth changing them that way?