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.
- Shared kernel service surface used by multiple subsystems, including helpers, cryptography, virtualization support, and async I/O infrastructure.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/io_uring_types.h
Detected Declarations
struct io_cancel_datafunction io_cancel_match_sequence
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
- Immediate include surface: `linux/io_uring_types.h`.
- Detected declarations: `struct io_cancel_data`, `function io_cancel_match_sequence`.
- Atlas domain: Kernel Services / io_uring.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.