io_uring/opdef.h

Source file repositories/reference/linux-study-clean/io_uring/opdef.h

File Facts

System
Linux kernel
Corpus path
io_uring/opdef.h
Extension
.h
Size
1579 bytes
Lines
59
Domain
Kernel Services
Bucket
io_uring
Inferred role
Kernel Services: implementation source
Status
source implementation candidate

Why This File Exists

Shared kernel service surface used by multiple subsystems, including helpers, cryptography, virtualization support, and async I/O infrastructure.

Dependency Surface

Detected Declarations

Annotated Snippet

struct io_issue_def {
	/* needs req->file assigned */
	unsigned		needs_file : 1;
	/* should block plug */
	unsigned		plug : 1;
	/* supports ioprio */
	unsigned		ioprio : 1;
	/* supports iopoll */
	unsigned		iopoll : 1;
	/* op supports buffer selection */
	unsigned		buffer_select : 1;
	/* hash wq insertion if file is a regular file */
	unsigned		hash_reg_file : 1;
	/* unbound wq insertion if file is a non-regular file */
	unsigned		unbound_nonreg_file : 1;
	/* set if opcode supports polled "wait" */
	unsigned		pollin : 1;
	unsigned		pollout : 1;
	unsigned		poll_exclusive : 1;
	/* skip auditing */
	unsigned		audit_skip : 1;
	/* vectored opcode, set if 1) vectored, and 2) handler needs to know */
	unsigned		vectored : 1;
	/* set to 1 if this opcode uses 128b sqes in a mixed sq */
	unsigned		is_128 : 1;

	/* size of async data needed, if any */
	unsigned short		async_size;

	/* bpf filter pdu size, if any */
	unsigned short		filter_pdu_size;

	int (*issue)(struct io_kiocb *, unsigned int);
	int (*prep)(struct io_kiocb *, const struct io_uring_sqe *);
	void (*filter_populate)(struct io_uring_bpf_ctx *, struct io_kiocb *);
};

struct io_cold_def {
	const char		*name;

	void (*sqe_copy)(struct io_kiocb *);
	void (*cleanup)(struct io_kiocb *);
	void (*fail)(struct io_kiocb *);
};

extern const struct io_issue_def io_issue_defs[];
extern const struct io_cold_def io_cold_defs[];

bool io_uring_op_supported(u8 opcode);

void io_uring_optable_init(void);
#endif

Annotation

Implementation Notes