mirror of
https://github.com/torvalds/linux.git
synced 2024-11-22 04:38:03 +00:00
84f2eecf95
doing so avoids the overhead of adding napi ids to all the rings that do
not enable napi.
if no id is added to napi_list because napi is disabled,
__io_napi_busy_loop() will not be called.
Signed-off-by: Olivier Langlois <olivier@trillion01.com>
Fixes: b4ccc4dd13 ("io_uring/napi: enable even with a timeout of 0")
Link: https://lore.kernel.org/r/bd989ccef5fda14f5fd9888faf4fefcf66bd0369.1723400131.git.olivier@trillion01.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
105 lines
2.4 KiB
C
105 lines
2.4 KiB
C
/* 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
|