Re: [PATCH v8 6/7] xfs: Validate atomic writes

[Christoph Hellwig]

On Tue, Oct 15, 2024 at 09:01:41AM +0000, John Garry wrote:
> Validate that an atomic write adheres to length/offset rules. Currently
> we can only write a single FS block.

> +	if (iocb->ki_flags & IOCB_ATOMIC) {
> +		if (ocount != ip->i_mount->m_sb.sb_blocksize)
> +			return -EINVAL;

Maybe throw in a comment here why we are currently limited to atomic
writes of exactly the file system block size and don't allow smaller
values.

Otherwise this looks good to me.