1 /* SPDX-License-Identifier: GPL-2.0 */
2
3 #ifndef IOU_NAPI_H
4 #define IOU_NAPI_H
5
6 #include <linux/kernel.h>
7 #include <linux/io_uring.h>
8 #include <net/busy_poll.h>
9
10 #ifdef CONFIG_NET_RX_BUSY_POLL
11
12 void io_napi_init(struct io_ring_ctx *ctx);
13 void io_napi_free(struct io_ring_ctx *ctx);
14
15 int io_register_napi(struct io_ring_ctx *ctx, void __user *arg);
16 int io_unregister_napi(struct io_ring_ctx *ctx, void __user *arg);
17
18 int __io_napi_add_id(struct io_ring_ctx *ctx, unsigned int napi_id,
19 unsigned int mode);
20
21 void __io_napi_busy_loop(struct io_ring_ctx *ctx, struct io_wait_queue *iowq);
22 int io_napi_sqpoll_busy_poll(struct io_ring_ctx *ctx);
23
io_napi(struct io_ring_ctx * ctx)24 static inline bool io_napi(struct io_ring_ctx *ctx)
25 {
26 return !list_empty(&ctx->napi_list);
27 }
28
io_napi_busy_loop(struct io_ring_ctx * ctx,struct io_wait_queue * iowq)29 static inline void io_napi_busy_loop(struct io_ring_ctx *ctx,
30 struct io_wait_queue *iowq)
31 {
32 if (!io_napi(ctx))
33 return;
34 __io_napi_busy_loop(ctx, iowq);
35 }
36
37 /*
38 * io_napi_add() - Add napi id to the busy poll list
39 * @req: pointer to io_kiocb request
40 *
41 * Add the napi id of the socket to the napi busy poll list and hash table.
42 */
io_napi_add(struct io_kiocb * req)43 static inline void io_napi_add(struct io_kiocb *req)
44 {
45 struct io_ring_ctx *ctx = req->ctx;
46 struct socket *sock;
47 unsigned int mode = IO_URING_NAPI_TRACKING_DYNAMIC;
48
49 if (READ_ONCE(ctx->napi_track_mode) != mode)
50 return;
51
52 sock = sock_from_file(req->file);
53 if (sock && sock->sk)
54 __io_napi_add_id(ctx, READ_ONCE(sock->sk->sk_napi_id), mode);
55 }
56
57 #else
58
io_napi_init(struct io_ring_ctx * ctx)59 static inline void io_napi_init(struct io_ring_ctx *ctx)
60 {
61 }
io_napi_free(struct io_ring_ctx * ctx)62 static inline void io_napi_free(struct io_ring_ctx *ctx)
63 {
64 }
io_register_napi(struct io_ring_ctx * ctx,void __user * arg)65 static inline int io_register_napi(struct io_ring_ctx *ctx, void __user *arg)
66 {
67 return -EOPNOTSUPP;
68 }
io_unregister_napi(struct io_ring_ctx * ctx,void __user * arg)69 static inline int io_unregister_napi(struct io_ring_ctx *ctx, void __user *arg)
70 {
71 return -EOPNOTSUPP;
72 }
io_napi(struct io_ring_ctx * ctx)73 static inline bool io_napi(struct io_ring_ctx *ctx)
74 {
75 return false;
76 }
io_napi_add(struct io_kiocb * req)77 static inline void io_napi_add(struct io_kiocb *req)
78 {
79 }
io_napi_busy_loop(struct io_ring_ctx * ctx,struct io_wait_queue * iowq)80 static inline void io_napi_busy_loop(struct io_ring_ctx *ctx,
81 struct io_wait_queue *iowq)
82 {
83 }
io_napi_sqpoll_busy_poll(struct io_ring_ctx * ctx)84 static inline int io_napi_sqpoll_busy_poll(struct io_ring_ctx *ctx)
85 {
86 return 0;
87 }
88 #endif /* CONFIG_NET_RX_BUSY_POLL */
89
90 #endif
91