On 4/29/26 17:25, Pavel Begunkov wrote:

Introduce a new file callback that allows creating long-term dma mapping. All necessary information together with a dmabuf will be passed in the second argument of type struct io_dmabuf_token, which will be defined in following patches.

Well first of all the naming is probably not the best. Maybe rather call that dma-buf attachment or context or mappping.

Then the patch should probably define the full interface and not just add the callback here and then the structure in a follow up patch.

Regards, Christian.

Signed-off-by: Pavel Begunkov asml.silence@gmail.com

include/linux/fs.h | 2 ++ 1 file changed, 2 insertions(+)

diff --git a/include/linux/fs.h b/include/linux/fs.h index b5b01bb22d12..c5558aab4628 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1920,6 +1920,7 @@ struct dir_context { struct io_uring_cmd; struct offset_ctx; +struct io_dmabuf_token; typedef unsigned int __bitwise fop_flags_t; @@ -1967,6 +1968,7 @@ struct file_operations { int (*uring_cmd_iopoll)(struct io_uring_cmd *, struct io_comp_batch *, unsigned int poll_flags); int (*mmap_prepare)(struct vm_area_desc *);

• int (*create_dmabuf_token)(struct file *, struct io_dmabuf_token *);

} __randomize_layout; /* Supports async buffered reads */