From patchwork Wed Feb 17 12:17:28 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 8337911 Return-Path: X-Original-To: patchwork-linux-acpi@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id E614AC02AA for ; Wed, 17 Feb 2016 12:19:39 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 14A302028D for ; Wed, 17 Feb 2016 12:19:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B92E420165 for ; Wed, 17 Feb 2016 12:19:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965276AbcBQMSk (ORCPT ); Wed, 17 Feb 2016 07:18:40 -0500 Received: from mga03.intel.com ([134.134.136.65]:53059 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161452AbcBQMRq (ORCPT ); Wed, 17 Feb 2016 07:17:46 -0500 Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga103.jf.intel.com with ESMTP; 17 Feb 2016 04:17:46 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.22,460,1449561600"; d="scan'208";a="886944302" Received: from black.fi.intel.com ([10.237.72.93]) by orsmga001.jf.intel.com with ESMTP; 17 Feb 2016 04:17:40 -0800 Received: by black.fi.intel.com (Postfix, from userid 1003) id 0CB3A7AB; Wed, 17 Feb 2016 14:17:32 +0200 (EET) From: Andy Shevchenko To: "Rafael J. Wysocki" , "Theodore Ts'o" , Arnd Bergmann , Greg Kroah-Hartman , Jarkko Sakkinen , Jani Nikula , David Airlie , Benjamin Tissoires , Bjorn Helgaas , Mathias Nyman , Matt Fleming , Lv Zheng , Mark Brown , Zhang Rui , Mika Westerberg , Andrew Morton , Rasmus Villemoes , linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-efi@vger.kernel.org, linux-api@vger.kernel.org, linux-nvdimm@lists.01.org Cc: Andy Shevchenko Subject: [PATCH v1 10/10] efivars: use generic UUID library Date: Wed, 17 Feb 2016 14:17:28 +0200 Message-Id: <1455711448-124103-11-git-send-email-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.7.0 In-Reply-To: <1455711448-124103-1-git-send-email-andriy.shevchenko@linux.intel.com> References: <1455711448-124103-1-git-send-email-andriy.shevchenko@linux.intel.com> Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Instead of opencoding let's use generic UUID library functions here. Signed-off-by: Andy Shevchenko --- fs/efivarfs/inode.c | 40 +++------------------------------------- 1 file changed, 3 insertions(+), 37 deletions(-) diff --git a/fs/efivarfs/inode.c b/fs/efivarfs/inode.c index 3381b9d..b579e3a 100644 --- a/fs/efivarfs/inode.c +++ b/fs/efivarfs/inode.c @@ -11,6 +11,7 @@ #include #include #include +#include #include "internal.h" @@ -44,11 +45,7 @@ struct inode *efivarfs_get_inode(struct super_block *sb, */ bool efivarfs_valid_name(const char *str, int len) { - static const char dashes[EFI_VARIABLE_GUID_LEN] = { - [8] = 1, [13] = 1, [18] = 1, [23] = 1 - }; const char *s = str + len - EFI_VARIABLE_GUID_LEN; - int i; /* * We need a GUID, plus at least one letter for the variable name, @@ -66,37 +63,7 @@ bool efivarfs_valid_name(const char *str, int len) * * 12345678-1234-1234-1234-123456789abc */ - for (i = 0; i < EFI_VARIABLE_GUID_LEN; i++) { - if (dashes[i]) { - if (*s++ != '-') - return false; - } else { - if (!isxdigit(*s++)) - return false; - } - } - - return true; -} - -static void efivarfs_hex_to_guid(const char *str, efi_guid_t *guid) -{ - guid->b[0] = hex_to_bin(str[6]) << 4 | hex_to_bin(str[7]); - guid->b[1] = hex_to_bin(str[4]) << 4 | hex_to_bin(str[5]); - guid->b[2] = hex_to_bin(str[2]) << 4 | hex_to_bin(str[3]); - guid->b[3] = hex_to_bin(str[0]) << 4 | hex_to_bin(str[1]); - guid->b[4] = hex_to_bin(str[11]) << 4 | hex_to_bin(str[12]); - guid->b[5] = hex_to_bin(str[9]) << 4 | hex_to_bin(str[10]); - guid->b[6] = hex_to_bin(str[16]) << 4 | hex_to_bin(str[17]); - guid->b[7] = hex_to_bin(str[14]) << 4 | hex_to_bin(str[15]); - guid->b[8] = hex_to_bin(str[19]) << 4 | hex_to_bin(str[20]); - guid->b[9] = hex_to_bin(str[21]) << 4 | hex_to_bin(str[22]); - guid->b[10] = hex_to_bin(str[24]) << 4 | hex_to_bin(str[25]); - guid->b[11] = hex_to_bin(str[26]) << 4 | hex_to_bin(str[27]); - guid->b[12] = hex_to_bin(str[28]) << 4 | hex_to_bin(str[29]); - guid->b[13] = hex_to_bin(str[30]) << 4 | hex_to_bin(str[31]); - guid->b[14] = hex_to_bin(str[32]) << 4 | hex_to_bin(str[33]); - guid->b[15] = hex_to_bin(str[34]) << 4 | hex_to_bin(str[35]); + return uuid_is_valid(s); } static int efivarfs_create(struct inode *dir, struct dentry *dentry, @@ -122,8 +89,7 @@ static int efivarfs_create(struct inode *dir, struct dentry *dentry, /* length of the variable name itself: remove GUID and separator */ namelen = dentry->d_name.len - EFI_VARIABLE_GUID_LEN - 1; - efivarfs_hex_to_guid(dentry->d_name.name + namelen + 1, - &var->var.VendorGuid); + uuid_le_to_bin(dentry->d_name.name + namelen + 1, &var->var.VendorGuid); for (i = 0; i < namelen; i++) var->var.VariableName[i] = dentry->d_name.name[i];