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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef IOU_NAPI_H
#define IOU_NAPI_H
#include <linux/kernel.h>
#include <linux/io_uring.h>
#include <net/busy_poll.h>
#ifdef CONFIG_NET_RX_BUSY_POLL
void io_napi_init(struct io_ring_ctx *ctx);
void io_napi_free(struct io_ring_ctx *ctx);
int io_register_napi(struct io_ring_ctx *ctx, void __user *arg);
int io_unregister_napi(struct io_ring_ctx *ctx, void __user *arg);
void __io_napi_add(struct io_ring_ctx *ctx, struct socket *sock);
void __io_napi_adjust_timeout(struct io_ring_ctx *ctx,
struct io_wait_queue *iowq, ktime_t to_wait);
void __io_napi_busy_loop(struct io_ring_ctx *ctx, struct io_wait_queue *iowq);
int io_napi_sqpoll_busy_poll(struct io_ring_ctx *ctx);
static inline bool io_napi(struct io_ring_ctx *ctx)
{
return !list_empty(&ctx->napi_list);
}
static inline void io_napi_adjust_timeout(struct io_ring_ctx *ctx,
struct io_wait_queue *iowq,
ktime_t to_wait)
{
if (!io_napi(ctx))
return;
__io_napi_adjust_timeout(ctx, iowq, to_wait);
}
static inline void io_napi_busy_loop(struct io_ring_ctx *ctx,
struct io_wait_queue *iowq)
{
if (!io_napi(ctx))
return;
__io_napi_busy_loop(ctx, iowq);
}
/*
* io_napi_add() - Add napi id to the busy poll list
* @req: pointer to io_kiocb request
*
* Add the napi id of the socket to the napi busy poll list and hash table.
*/
static inline void io_napi_add(struct io_kiocb *req)
{
struct io_ring_ctx *ctx = req->ctx;
struct socket *sock;
if (!READ_ONCE(ctx->napi_enabled))
return;
sock = sock_from_file(req->file);
if (sock)
__io_napi_add(ctx, sock);
}
#else
static inline void io_napi_init(struct io_ring_ctx *ctx)
{
}
static inline void io_napi_free(struct io_ring_ctx *ctx)
{
}
static inline int io_register_napi(struct io_ring_ctx *ctx, void __user *arg)
{
return -EOPNOTSUPP;
}
static inline int io_unregister_napi(struct io_ring_ctx *ctx, void __user *arg)
{
return -EOPNOTSUPP;
}
static inline bool io_napi(struct io_ring_ctx *ctx)
{
return false;
}
static inline void io_napi_add(struct io_kiocb *req)
{
}
static inline void io_napi_adjust_timeout(struct io_ring_ctx *ctx,
struct io_wait_queue *iowq,
ktime_t to_wait)
{
}
static inline void io_napi_busy_loop(struct io_ring_ctx *ctx,
struct io_wait_queue *iowq)
{
}
static inline int io_napi_sqpoll_busy_poll(struct io_ring_ctx *ctx)
{
return 0;
}
#endif /* CONFIG_NET_RX_BUSY_POLL */
#endif
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