[PATCH v3 01/10] file: add callback for creating long-term dmabuf maps

Pavel Begunkov
2026-04-29T15:26:24Z

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.

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 */
--
2.53.0