io_uring/notif.h

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

File Facts

System
Linux kernel
Corpus path
io_uring/notif.h
Extension
.h
Size
1320 bytes
Lines
58
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_notif_data {
	struct file		*file;
	struct ubuf_info	uarg;

	struct io_notif_data	*next;
	struct io_notif_data	*head;

	unsigned		account_pages;
	bool			zc_report;
	bool			zc_used;
	bool			zc_copied;
};

struct io_kiocb *io_alloc_notif(struct io_ring_ctx *ctx);
void io_tx_ubuf_complete(struct sk_buff *skb, struct ubuf_info *uarg,
			 bool success);

static inline struct io_notif_data *io_notif_to_data(struct io_kiocb *notif)
{
	return io_kiocb_to_cmd(notif, struct io_notif_data);
}

static inline void io_notif_flush(struct io_kiocb *notif)
	__must_hold(&notif->ctx->uring_lock)
{
	struct io_notif_data *nd = io_notif_to_data(notif);

	io_tx_ubuf_complete(NULL, &nd->uarg, true);
}

static inline int io_notif_account_mem(struct io_kiocb *notif, unsigned len)
{
	struct io_ring_ctx *ctx = notif->ctx;
	struct io_notif_data *nd = io_notif_to_data(notif);
	unsigned nr_pages = (len >> PAGE_SHIFT) + 2;
	int ret;

	if (ctx->user) {
		ret = __io_account_mem(ctx->user, nr_pages);
		if (ret)
			return ret;
		nd->account_pages += nr_pages;
	}
	return 0;
}

Annotation

Implementation Notes