io_uring/cancel.h

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

File Facts

System
Linux kernel
Corpus path
io_uring/cancel.h
Extension
.h
Size
1611 bytes
Lines
50
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_cancel_data {
	struct io_ring_ctx *ctx;
	u64 data;
	struct file *file;
	u8 opcode;
	u32 flags;
	int seq;
};

int io_async_cancel_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
int io_async_cancel(struct io_kiocb *req, unsigned int issue_flags);

int io_try_cancel(struct io_uring_task *tctx, struct io_cancel_data *cd,
		  unsigned int issue_flags);

int io_sync_cancel(struct io_ring_ctx *ctx, void __user *arg);
bool io_cancel_req_match(struct io_kiocb *req, struct io_cancel_data *cd);
bool io_match_task_safe(struct io_kiocb *head, struct io_uring_task *tctx,
			bool cancel_all);

bool io_cancel_remove_all(struct io_ring_ctx *ctx, struct io_uring_task *tctx,
			  struct hlist_head *list, bool cancel_all,
			  bool (*cancel)(struct io_kiocb *));
int io_cancel_remove(struct io_ring_ctx *ctx, struct io_cancel_data *cd,
		     unsigned int issue_flags, struct hlist_head *list,
		     bool (*cancel)(struct io_kiocb *));
__cold bool io_uring_try_cancel_requests(struct io_ring_ctx *ctx,
					 struct io_uring_task *tctx,
					 bool cancel_all, bool is_sqpoll_thread);
__cold void io_uring_cancel_generic(bool cancel_all, struct io_sq_data *sqd);
__cold bool io_cancel_ctx_cb(struct io_wq_work *work, void *data);

static inline bool io_cancel_match_sequence(struct io_kiocb *req, int sequence)
{
	if (req->cancel_seq_set && sequence == req->work.cancel_seq)
		return true;

	req->cancel_seq_set = true;
	req->work.cancel_seq = sequence;
	return false;
}

#endif

Annotation

Implementation Notes