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Date: Wed, 2 Nov 2016 08:04:54 -0700 From: Deepa Dinamani <deepa.kernel@...il.com> To: linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org Cc: arnd@...db.de, tglx@...utronix.de, gregkh@...uxfoundation.org, akpm@...ux-foundation.org, tytso@....edu, viro@...iv.linux.org.uk, y2038@...ts.linaro.org, Andreas Dilger <adilger.kernel@...ger.ca>, linux-ext4@...r.kernel.org Subject: [RFC 4/6] ext4: Initialize timestamps limits ext4 has different overflow limits for max filesystem timestamps based on the extra bytes available. Signed-off-by: Deepa Dinamani <deepa.kernel@...il.com> Cc: "Theodore Ts'o" <tytso@....edu> Cc: Andreas Dilger <adilger.kernel@...ger.ca> Cc: linux-ext4@...r.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 6789379..fca339a 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -1635,6 +1635,10 @@ 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 ab00bff..ebd039d 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -3633,8 +3633,13 @@ 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
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