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 void __io_napi_add(struct io_ring_ctx *ctx, struct socket *sock); 19 20 void __io_napi_busy_loop(struct io_ring_ctx *ctx, struct io_wait_queue *iowq); 21 int io_napi_sqpoll_busy_poll(struct io_ring_ctx *ctx); 22 23 static inline bool io_napi(struct io_ring_ctx *ctx) 24 { 25 return !list_empty(&ctx->napi_list); 26 } 27 28 static inline void io_napi_busy_loop(struct io_ring_ctx *ctx, 29 struct io_wait_queue *iowq) 30 { 31 if (!io_napi(ctx)) 32 return; 33 __io_napi_busy_loop(ctx, iowq); 34 } 35 36 /* 37 * io_napi_add() - Add napi id to the busy poll list 38 * @req: pointer to io_kiocb request 39 * 40 * Add the napi id of the socket to the napi busy poll list and hash table. 41 */ 42 static inline void io_napi_add(struct io_kiocb *req) 43 { 44 struct io_ring_ctx *ctx = req->ctx; 45 struct socket *sock; 46 47 if (!READ_ONCE(ctx->napi_enabled)) 48 return; 49 50 sock = sock_from_file(req->file); 51 if (sock) 52 __io_napi_add(ctx, sock); 53 } 54 55 #else 56 57 static inline void io_napi_init(struct io_ring_ctx *ctx) 58 { 59 } 60 static inline void io_napi_free(struct io_ring_ctx *ctx) 61 { 62 } 63 static inline int io_register_napi(struct io_ring_ctx *ctx, void __user *arg) 64 { 65 return -EOPNOTSUPP; 66 } 67 static inline int io_unregister_napi(struct io_ring_ctx *ctx, void __user *arg) 68 { 69 return -EOPNOTSUPP; 70 } 71 static inline bool io_napi(struct io_ring_ctx *ctx) 72 { 73 return false; 74 } 75 static inline void io_napi_add(struct io_kiocb *req) 76 { 77 } 78 static inline void io_napi_busy_loop(struct io_ring_ctx *ctx, 79 struct io_wait_queue *iowq) 80 { 81 } 82 static inline int io_napi_sqpoll_busy_poll(struct io_ring_ctx *ctx) 83 { 84 return 0; 85 } 86 #endif /* CONFIG_NET_RX_BUSY_POLL */ 87 88 #endif 89