[PATCH RFC v2 1/3] io_uring: use an enumeration for io_uring_register(2) opcodes

Stefano Garzarella
2020-07-16T12:49:16Z

The enumeration allows us to keep track of the last
io_uring_register(2) opcode available.

Behaviour and opcodes names don't change.

Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
---
include/uapi/linux/io_uring.h | 27 ++++++++++++++++-----------
1 file changed, 16 insertions(+), 11 deletions(-)

diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h
index 7843742b8b74..efc50bd0af34 100644
--- a/include/uapi/linux/io_uring.h
+++ b/include/uapi/linux/io_uring.h
@@ -253,17 +253,22 @@ struct io_uring_params {
/*
* io_uring_register(2) opcodes and arguments
*/
-#define IORING_REGISTER_BUFFERS 0
-#define IORING_UNREGISTER_BUFFERS 1
-#define IORING_REGISTER_FILES 2
-#define IORING_UNREGISTER_FILES 3
-#define IORING_REGISTER_EVENTFD 4
-#define IORING_UNREGISTER_EVENTFD 5
-#define IORING_REGISTER_FILES_UPDATE 6
-#define IORING_REGISTER_EVENTFD_ASYNC 7
-#define IORING_REGISTER_PROBE 8
-#define IORING_REGISTER_PERSONALITY 9
-#define IORING_UNREGISTER_PERSONALITY 10
+enum {
+ IORING_REGISTER_BUFFERS,
+ IORING_UNREGISTER_BUFFERS,
+ IORING_REGISTER_FILES,
+ IORING_UNREGISTER_FILES,
+ IORING_REGISTER_EVENTFD,
+ IORING_UNREGISTER_EVENTFD,
+ IORING_REGISTER_FILES_UPDATE,
+ IORING_REGISTER_EVENTFD_ASYNC,
+ IORING_REGISTER_PROBE,
+ IORING_REGISTER_PERSONALITY,
+ IORING_UNREGISTER_PERSONALITY,
+
+ /* this goes last */
+ IORING_REGISTER_LAST
+};

struct io_uring_files_update {
__u32 offset;
--
2.26.2