btrfs: convert to multigrain timestamps

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Enable multigrain timestamps, which should ensure that there is an
apparent change to the timestamp whenever it has been written after
being actively observed via getattr.

Beyond enabling the FS_MGTIME flag, this patch eliminates
update_time_for_write, which goes to great pains to avoid in-memory
stores. Just have it overwrite the timestamps unconditionally.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Acked-by: David Sterba <dsterba@suse.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Message-Id: <20230807-mgctime-v7-13-d1dec143a704@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>

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Jeff Layton 2023-08-07 15:38:44 -04:00 • committed by Christian Brauner

parent 0269b58586

commit 50e9ceef1d

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GPG key ID: 91C61BC06578DCA2

2 changed files with 7 additions and 22 deletions

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24

fs/btrfs/file.c

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5

fs/btrfs/super.c

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