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io_uring/query: return number of available queries

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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>
This commit is contained in:
Pavel Begunkov
2025-11-10 13:03:53 +00:00
committed by Jens Axboe
parent d3c9c213c0
commit 6a77267d97
2 changed files with 5 additions and 0 deletions
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3
include/uapi/linux/io_uring/query.h
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@@ -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

2
io_uring/query.c
View File

@@ -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);
}