Implement a new system call: getvfsstat(). This system call returns

Implement a new system call: getvfsstat().  This system call returns
an array of statfs and statvfs structures.  Unfortunately there is no way
to just return an array of statvfs structures because the statvfs structure
does not have sufficient information in it to identify the mount point.

    getvfsstat(struct statfs *buf, struct statvfs *vbuf,
	       long vbufsize, int flags);