From: Hao Xu <howeyxu@xxxxxxxxxxx>
Add a new setup flag to turn on/off uringlet mode.
Signed-off-by: Hao Xu <howeyxu@xxxxxxxxxxx>
---
include/uapi/linux/io_uring.h | 4 ++++
io_uring/io_uring.c | 4 +++-
2 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h
index 1463cfecb56b..68507c23b079 100644
--- a/include/uapi/linux/io_uring.h
+++ b/include/uapi/linux/io_uring.h
@@ -152,6 +152,10 @@ enum {
* Only one task is allowed to submit requests
*/
#define IORING_SETUP_SINGLE_ISSUER (1U << 12)
+/*
+ * uringlet mode
+ */
+#define IORING_SETUP_URINGLET (1U << 13)
enum io_uring_op {
IORING_OP_NOP,
diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c
index ebfdb2212ec2..5e4f5b1684dd 100644
--- a/io_uring/io_uring.c
+++ b/io_uring/io_uring.c
@@ -3226,6 +3226,8 @@ static __cold int io_uring_create(unsigned entries, struct io_uring_params *p,
struct file *file;
int ret;
+ if (p->flags & IORING_SETUP_URINGLET)
+ return -EINVAL;
if (!entries)
return -EINVAL;
if (entries > IORING_MAX_ENTRIES) {
@@ -3400,7 +3402,7 @@ static long io_uring_setup(u32 entries, struct io_uring_params __user *params)
IORING_SETUP_R_DISABLED | IORING_SETUP_SUBMIT_ALL |
IORING_SETUP_COOP_TASKRUN | IORING_SETUP_TASKRUN_FLAG |
IORING_SETUP_SQE128 | IORING_SETUP_CQE32 |
- IORING_SETUP_SINGLE_ISSUER))
+ IORING_SETUP_SINGLE_ISSUER | IORING_SETUP_URINGLET))
return -EINVAL;
return io_uring_create(entries, &p, params);
--
2.25.1
