From: Pavel Begunkov <asml.silence@gmail.com>
Date: Mon, 10 Nov 2025 13:03:53 +0000 (+0000)
Subject: io_uring/query: return number of available queries
X-Git-Tag: v6.18-rc6~22^2~1
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=6a77267d97b5b6cd0e35099ab4eb054e5f965ee6;p=thirdparty%2Flinux.git

io_uring/query: return number of available queries

It's useful to know which query opcodes are available. Extend the
structure and return that. It's a trivial change, and even though it can
be painlessly extended later, it'd still require adding a v2 of the
structure.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/include/uapi/linux/io_uring/query.h b/include/uapi/linux/io_uring/query.h
index 5d754322a27c8..3539ccbfd0644 100644
--- a/include/uapi/linux/io_uring/query.h
+++ b/include/uapi/linux/io_uring/query.h
@@ -36,6 +36,9 @@ struct io_uring_query_opcode {
 	__u64	enter_flags;
 	/* Bitmask of all supported IOSQE_* flags */
 	__u64	sqe_flags;
+	/* The number of available query opcodes */
+	__u32	nr_query_opcodes;
+	__u32	__pad;
 };
 
 #endif
diff --git a/io_uring/query.c b/io_uring/query.c
index 645301bd2c829..cf02893ba911b 100644
--- a/io_uring/query.c
+++ b/io_uring/query.c
@@ -20,6 +20,8 @@ static ssize_t io_query_ops(void *data)
 	e->ring_setup_flags = IORING_SETUP_FLAGS;
 	e->enter_flags = IORING_ENTER_FLAGS;
 	e->sqe_flags = SQE_VALID_FLAGS;
+	e->nr_query_opcodes = __IO_URING_QUERY_MAX;
+	e->__pad = 0;
 	return sizeof(*e);
 }