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authorJens Axboe <axboe@kernel.dk>2022-05-27 19:55:07 +0300
committerJens Axboe <axboe@kernel.dk>2022-07-25 03:39:12 +0300
commitb9ba8a4463cd78d0aee520c4bf2569820ac29929 (patch)
tree7ffcd2042e9e3bec8f314b0e3b997cca4613b591 /include/uapi/linux/io_uring.h
parentd9b57aa3cfc792ccac6858376c017dbea6cb2872 (diff)
downloadlinux-b9ba8a4463cd78d0aee520c4bf2569820ac29929.tar.xz
io_uring: add support for level triggered poll
By default, the POLL_ADD command does edge triggered poll - if we get a non-zero mask on the initial poll attempt, we complete the request successfully. Support level triggered by always waiting for a notification, regardless of whether or not the initial mask matches the file state. Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/uapi/linux/io_uring.h')
-rw-r--r--include/uapi/linux/io_uring.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h
index 0ad3da28d2fc..4927bb69387a 100644
--- a/include/uapi/linux/io_uring.h
+++ b/include/uapi/linux/io_uring.h
@@ -229,10 +229,13 @@ enum io_uring_op {
*
* IORING_POLL_UPDATE Update existing poll request, matching
* sqe->addr as the old user_data field.
+ *
+ * IORING_POLL_LEVEL Level triggered poll.
*/
#define IORING_POLL_ADD_MULTI (1U << 0)
#define IORING_POLL_UPDATE_EVENTS (1U << 1)
#define IORING_POLL_UPDATE_USER_DATA (1U << 2)
+#define IORING_POLL_ADD_LEVEL (1U << 3)
/*
* ASYNC_CANCEL flags.