/* * Unified UUID/GUID definition * * Copyright (C) 2009, Intel Corp. * Huang Ying <ying.huang@intel.com> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License version * 2 as published by the Free Software Foundation; * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/kernel.h> #include <linux/export.h> #include <linux/uuid.h> #include <linux/random.h> static void __uuid_gen_common(__u8 b[16]) { int i; u32 r; for (i = 0; i < 4; i++) { r = random32(); memcpy(b + i * 4, &r, 4); } /* reversion 0b10 */ b[8] = (b[8] & 0x3F) | 0x80; } void uuid_le_gen(uuid_le *lu) { __uuid_gen_common(lu->b); /* version 4 : random generation */ lu->b[7] = (lu->b[7] & 0x0F) | 0x40; } EXPORT_SYMBOL_GPL(uuid_le_gen); void uuid_be_gen(uuid_be *bu) { __uuid_gen_common(bu->b); /* version 4 : random generation */ bu->b[6] = (bu->b[6] & 0x0F) | 0x40; } EXPORT_SYMBOL_GPL(uuid_be_gen);