/* SPDX-License-Identifier: (GPL-2.0 WITH Linux-syscall-note) OR MIT *//* * Header file for the io_uring query interface. * * Copyright (C) 2026 Pavel Begunkov <asml.silence@gmail.com> * Copyright (C) Meta Platforms, Inc. */#ifndef LINUX_IO_URING_QUERY_H#define LINUX_IO_URING_QUERY_H #include <linux/types.h> struct io_uring_query_hdr {	__u64 next_entry;	__u64 query_data;	__u32 query_op;	__u32 size;	__s32 result;	__u32 __resv[3];}; enum {	IO_URING_QUERY_OPCODES			= 0,	IO_URING_QUERY_ZCRX			= 1,	IO_URING_QUERY_SCQ			= 2,	IO_URING_QUERY_ZCRX_NOTIF		= 3, 	__IO_URING_QUERY_MAX,}; /* Doesn't require a ring */struct io_uring_query_opcode {	/* The number of supported IORING_OP_* opcodes */	__u32	nr_request_opcodes;	/* The number of supported IORING_[UN]REGISTER_* opcodes */	__u32	nr_register_opcodes;	/* Bitmask of all supported IORING_FEAT_* flags */	__u64	feature_flags;	/* Bitmask of all supported IORING_SETUP_* flags */	__u64	ring_setup_flags;	/* Bitmask of all supported IORING_ENTER_** flags */	__u64	enter_flags;	/* Bitmask of all supported IOSQE_* flags */	__u64	sqe_flags;	/* The number of available query opcodes */	__u32	nr_query_opcodes;	__u32	__pad;}; struct io_uring_query_zcrx {	/* Bitmask of supported ZCRX_REG_* flags, */	__u64 register_flags;	/* Bitmask of all supported IORING_ZCRX_AREA_* flags */	__u64 area_flags;	/* The number of supported ZCRX_CTRL_* opcodes */	__u32 nr_ctrl_opcodes;	/* Bitmask of ZCRX_FEATURE_* indicating which features are available */	__u32 features;	/* The refill ring header size */	__u32 rq_hdr_size;	/* The alignment for the header */	__u32 rq_hdr_alignment;	__u64 __resv2;}; struct io_uring_query_zcrx_notif {	/* Bitmask of supported ZCRX_NOTIF_* flags */	__u32 notif_flags;	/* Size of io_uring_zcrx_notif_stats */	__u32 notif_stats_size;	/* Required alignment for the stats struct within the region (ie stats_offset) */	__u32 notif_stats_off_alignment;	__u32 __resv1;	__u64 __resv2[4];}; struct io_uring_query_scq {	/* The SQ/CQ rings header size */	__u64 hdr_size;	/* The alignment for the header */	__u64 hdr_alignment;}; #endif