btrfs: disallow NODATACOW in ZONED mode

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NODATACOW implies overwriting the file data on a device, which is
impossible in sequential required zones. Disable NODATACOW globally with
mount option and per-file NODATACOW attribute by masking FS_NOCOW_FL.

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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Naohiro Aota 2020-11-10 20:26:11 +09:00 • committed by David Sterba

parent 5d1ab66c56

commit d206e9c9c5

2 changed files with 18 additions and 0 deletions

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13

fs/btrfs/ioctl.c

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5

fs/btrfs/zoned.c

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