include/uapi/linux/io_uring/query.h

Source file repositories/reference/linux-study-clean/include/uapi/linux/io_uring/query.h

File Facts

System
Linux kernel
Corpus path
include/uapi/linux/io_uring/query.h
Extension
.h
Size
2160 bytes
Lines
85
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

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

Annotation

Implementation Notes