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Date: Thu, 27 Aug 2020 16:58:29 +0200
From: Stefano Garzarella <sgarzare@...hat.com>
To: Jens Axboe <axboe@...nel.dk>
Cc: Kernel Hardening <kernel-hardening@...ts.openwall.com>,
Christian Brauner <christian.brauner@...ntu.com>,
linux-fsdevel@...r.kernel.org,
io-uring@...r.kernel.org,
Alexander Viro <viro@...iv.linux.org.uk>,
Stefan Hajnoczi <stefanha@...hat.com>,
Jann Horn <jannh@...gle.com>,
Jeff Moyer <jmoyer@...hat.com>,
Aleksa Sarai <asarai@...e.de>,
Sargun Dhillon <sargun@...gun.me>,
linux-kernel@...r.kernel.org,
Kees Cook <keescook@...omium.org>
Subject: [PATCH v6 1/3] io_uring: use an enumeration for io_uring_register(2) opcodes
The enumeration allows us to keep track of the last
io_uring_register(2) opcode available.
Behaviour and opcodes names don't change.
Reviewed-by: Kees Cook <keescook@...omium.org>
Signed-off-by: Stefano Garzarella <sgarzare@...hat.com>
---
v5:
- explicitly assign enum values since this is UAPI [Kees]
---
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 d65fde732518..5f12ae6a415c 100644
--- a/include/uapi/linux/io_uring.h
+++ b/include/uapi/linux/io_uring.h
@@ -255,17 +255,22 @@ 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 = 0,
+ IORING_UNREGISTER_BUFFERS = 1,
+ IORING_REGISTER_FILES = 2,
+ IORING_UNREGISTER_FILES = 3,
+ IORING_REGISTER_EVENTFD = 4,
+ IORING_UNREGISTER_EVENTFD = 5,
+ IORING_REGISTER_FILES_UPDATE = 6,
+ IORING_REGISTER_EVENTFD_ASYNC = 7,
+ IORING_REGISTER_PROBE = 8,
+ IORING_REGISTER_PERSONALITY = 9,
+ IORING_UNREGISTER_PERSONALITY = 10,
+
+ /* this goes last */
+ IORING_REGISTER_LAST
+};
struct io_uring_files_update {
__u32 offset;
--
2.26.2
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