[PATCH v9 05/13] block: add dma-buf support for raw bdev

[Pavel Begunkov]

On 10/8/26 13:27, Anuj Gupta/Anuj Gupta wrote:
> On 10/7/2026 7:12 AM, Pavel Begunkov wrote:
>> +static int blkdev_init_dma_buf_io_ctx(struct file *file,
>> +				      struct dma_buf_io_ctx *ctx)
>> +{
>> +	struct block_device *bdev = file_bdev(file);
>> +	struct gendisk *disk = bdev->bd_disk;
>> +
>> +	if (!(file->f_flags & O_DIRECT))
>> +		return -EINVAL;
>> +	if (!disk->fops->init_dma_buf_io_ctx)
>> +		return -EOPNOTSUPP;
> 
> dma-buf doesn't work with PI: bi_dmabuf_map aliases bi_io_vec, and
> blk_integrity_iterate() walks it as bvecs to generate/verify the
> checksum. rw-dmabuf liburing test hangs on a PI enabled NVMe. Something
> like below is needed:

Thanks, I already took it into v10! There is some some confusion
with the branches, but will get incorporated in either case.

-- 
Pavel Begunkov