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: Johannes Thumshirn <jthumshirn@xxxxxxx> Reviewed-by: Josef Bacik <josef@xxxxxxxxxxxxxx> Signed-off-by: Naohiro Aota <naohiro.aota@xxxxxxx> --- fs/btrfs/ioctl.c | 3 +++ fs/btrfs/zoned.c | 6 ++++++ 2 files changed, 9 insertions(+) diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index ab408a23ba32..5d592da4e2ff 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -91,6 +91,9 @@ struct btrfs_ioctl_send_args_32 { static unsigned int btrfs_mask_fsflags_for_type(struct inode *inode, unsigned int flags) { + if (btrfs_fs_incompat(btrfs_sb(inode->i_sb), ZONED)) + flags &= ~FS_NOCOW_FL; + if (S_ISDIR(inode->i_mode)) return flags; else if (S_ISREG(inode->i_mode)) diff --git a/fs/btrfs/zoned.c b/fs/btrfs/zoned.c index 1629e585ba8c..6bce654bb0e8 100644 --- a/fs/btrfs/zoned.c +++ b/fs/btrfs/zoned.c @@ -284,5 +284,11 @@ int btrfs_check_mountopts_zoned(struct btrfs_fs_info *info) return -EOPNOTSUPP; } + if (btrfs_test_opt(info, NODATACOW)) { + btrfs_err(info, + "cannot enable nodatacow with ZONED mode"); + return -EOPNOTSUPP; + } + return 0; } -- 2.27.0