From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754622AbeBGQOh (ORCPT ); Wed, 7 Feb 2018 11:14:37 -0500 Received: from smtpbg303.qq.com ([184.105.206.26]:55702 "EHLO smtpbg303.qq.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754543AbeBGQOe (ORCPT ); Wed, 7 Feb 2018 11:14:34 -0500 X-QQ-mid: esmtp12t1518020064tzdj8o17v X-QQ-SSF: A1000000000000F00H100700000000P X-QQ-FEAT: /2O7Dyku7/OR9GGXdPiTjC5lyVXN+Ep+5RBLlTKfD7tApXQWZDS4nOfmkir6R lQ/hhfaMMiK3TDnDYIow3GLo/u13JcJBjrQvm5YOTd7C/LAoVLnzwOo0w8VaOuSaWNMws9e MoXNKDWVMYDGQjPutEV4TYHS/U054KBqdDgXyfX6G+KFjPaDur9ml0V8bMRP+CNsDplINwH Omy7wpUYZnysJSHTzUr9Knw+91MkeY1G6Gw/cysWgBn5AEp8pBTpgGjcohuFV3feo/WsIn3 4AapE6HeTva3yS/RH1MVUEfWV1/Bq3cRJFVQ== X-QQ-GoodBg: 0 From: Chen Guanqiao To: hirofumi@mail.parknet.co.jp Cc: linux-kernel@vger.kernel.org, andy.shevchenko@gmail.com, pali.rohar@gmail.com, Chen Guanqiao Subject: [PATCH v9 2/3] fs: fat: Add volume label entry method function Date: Thu, 8 Feb 2018 00:14:06 +0800 Message-Id: <20180207161407.30507-3-chen.chenchacha@foxmail.com> X-Mailer: git-send-email 2.14.3 In-Reply-To: <20180207161407.30507-1-chen.chenchacha@foxmail.com> References: <20180207161407.30507-1-chen.chenchacha@foxmail.com> X-QQ-SENDSIZE: 520 X-QQ-FName: 0763023B8F0B412B9F8088E0A9644A15 X-QQ-LocalIP: 10.208.130.95 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Signed-off-by: Chen Guanqiao --- fs/fat/dir.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) diff --git a/fs/fat/dir.c b/fs/fat/dir.c index 8e100c3bf72c..d5286402c829 100644 --- a/fs/fat/dir.c +++ b/fs/fat/dir.c @@ -881,6 +881,53 @@ static int fat_get_short_entry(struct inode *dir, loff_t *pos, return -ENOENT; } +int fat_get_volume_label_entry(struct inode *dir, struct buffer_head **bh, + struct msdos_dir_entry **de) +{ + loff_t pos = 0; + + *bh = NULL; + *de = NULL; + while (fat_get_entry(dir, &pos, bh, de) >= 0) { + if (((*de)->attr & ATTR_VOLUME) && ((*de)->attr != ATTR_EXT) && + !IS_FREE((*de)->name)) + return 0; + } + return -ENOENT; +} +EXPORT_SYMBOL_GPL(fat_get_volume_label_entry); + +int fat_add_volume_label_entry(struct inode *dir, const unsigned char *name, + struct timespec *ts) +{ + struct msdos_sb_info *sbi = MSDOS_SB(dir->i_sb); + struct msdos_dir_entry de; + struct fat_slot_info sinfo; + __le16 time, date; + int err; + + memcpy(de.name, name, MSDOS_NAME); + de.attr = ATTR_VOLUME; + de.lcase = 0; + fat_time_unix2fat(sbi, ts, &time, &date, NULL); + de.cdate = de.adate = 0; + de.ctime = 0; + de.ctime_cs = 0; + de.time = time; + de.date = date; + fat_set_start(&de, 0); + de.size = 0; + + err = fat_add_entries(dir, &de, 1, &sinfo); + if (err) + return err; + + brelse(sinfo.bh); + + return 0; +} +EXPORT_SYMBOL_GPL(fat_add_volume_label_entry); + /* * The ".." entry can not provide the "struct fat_slot_info" information * for inode, nor a usable i_pos. So, this function provides some information -- 2.14.3