From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752935AbdDHTkO (ORCPT ); Sat, 8 Apr 2017 15:40:14 -0400 Received: from mail-pf0-f194.google.com ([209.85.192.194]:34279 "EHLO mail-pf0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752343AbdDHTjO (ORCPT ); Sat, 8 Apr 2017 15:39:14 -0400 From: Deepa Dinamani To: viro@zeniv.linux.org.uk, tytso@mit.edu, adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org Cc: torvalds@linux-foundation.org, tglx@linutronix.de, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, arnd@arndb.de, y2038@lists.linaro.org Subject: [PATCH v5 3/5] ext4: Initialize timestamps limits Date: Sat, 8 Apr 2017 12:37:45 -0700 Message-Id: <1491680267-11171-4-git-send-email-deepa.kernel@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1491680267-11171-1-git-send-email-deepa.kernel@gmail.com> References: <1491680267-11171-1-git-send-email-deepa.kernel@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org ext4 has different overflow limits for max filesystem timestamps based on the extra bytes available. Signed-off-by: Deepa Dinamani Cc: "Theodore Ts'o" Cc: Andreas Dilger Cc: linux-ext4@vger.kernel.org --- fs/ext4/ext4.h | 4 ++++ fs/ext4/super.c | 7 ++++++- 2 files changed, 10 insertions(+), 1 deletion(-) diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index fb69ee2..3292d4e 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -1640,6 +1640,10 @@ static inline void ext4_clear_state_flags(struct ext4_inode_info *ei) #define EXT4_GOOD_OLD_INODE_SIZE 128 +#define EXT4_EXTRA_TIMESTAMP_MAX (((s64)1 << 34) - 1 + S32_MIN) +#define EXT4_NON_EXTRA_TIMESTAMP_MAX Y2038_EXPIRY_TIMESTAMP +#define EXT4_TIMESTAMP_MIN S32_MIN + /* * Feature set definitions */ diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 73cae0c..0c1a864 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -3687,8 +3687,13 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) sbi->s_inode_size); goto failed_mount; } - if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) + if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); + sb->s_time_max = EXT4_EXTRA_TIMESTAMP_MAX; + } else + sb->s_time_max = EXT4_NON_EXTRA_TIMESTAMP_MAX; + + sb->s_time_min = EXT4_TIMESTAMP_MIN; } sbi->s_desc_size = le16_to_cpu(es->s_desc_size); -- 2.7.4