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@lst.de [pavel: reject dma-buf without O_DIRECT] Signed-off-by: Pavel Begunkov asml.silence@gmail.com

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