[PATCH v7 05/13] block: add dma-buf support for raw bdev

[Christoph Hellwig]

On Mon, Sep 28, 2026 at 02:32:21PM +0100, Pavel Begunkov wrote:
> Add a simple proxy implementation of init_dma_buf_io_ctx() forwarding
> the call to a new struct block_device_operations operation. Also reject
> dma-buf backed iterators for buffered IO.
> 
> Reviewed-by: Christoph Hellwig <hch at lst.de>
> [pavel: reject dma-buf without O_DIRECT]
> Signed-off-by: Pavel Begunkov <asml.silence at gmail.com>

The Sashiko report about the errno on fallback here looks real,
and is probably easily fixed by setting a proper errno.