60 void __user *io_buffer_select(struct io_kiocb *req, size_t *len,
62 int io_buffers_select(struct io_kiocb *req, struct buf_sel_arg *arg,
64 int io_buffers_peek(struct io_kiocb *req, struct buf_sel_arg *arg);
67 int io_remove_buffers_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
68 int io_remove_buffers(struct io_kiocb *req, unsigned int issue_flags);
70 int io_provide_buffers_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
71 int io_provide_buffers(struct io_kiocb *req, unsigned int issue_flags);
77 void __io_put_kbuf(struct io_kiocb *req, int len, unsigned issue_flags);
79 bool io_kbuf_recycle_legacy(struct io_kiocb *req, unsigned issue_flags);
84 static inline bool io_kbuf_recycle_ring(struct io_kiocb *req)  in io_kbuf_recycle_ring()  argument
93 	if (req->buf_list) {  in io_kbuf_recycle_ring()
94 		req->buf_index = req->buf_list->bgid;  in io_kbuf_recycle_ring()
95 		req->flags &= ~(REQ_F_BUFFER_RING|REQ_F_BUFFERS_COMMIT);  in io_kbuf_recycle_ring()
101 static inline bool io_do_buffer_select(struct io_kiocb *req)  in io_do_buffer_select()  argument
103 	if (!(req->flags & REQ_F_BUFFER_SELECT))  in io_do_buffer_select()
105 	return !(req->flags & (REQ_F_BUFFER_SELECTED|REQ_F_BUFFER_RING));  in io_do_buffer_select()
108 static inline bool io_kbuf_recycle(struct io_kiocb *req, unsigned issue_flags)  in io_kbuf_recycle()  argument
110 	if (req->flags & REQ_F_BL_NO_RECYCLE)  in io_kbuf_recycle()
112 	if (req->flags & REQ_F_BUFFER_SELECTED)  in io_kbuf_recycle()
113 		return io_kbuf_recycle_legacy(req, issue_flags);  in io_kbuf_recycle()
114 	if (req->flags & REQ_F_BUFFER_RING)  in io_kbuf_recycle()
115 		return io_kbuf_recycle_ring(req);  in io_kbuf_recycle()
122 static inline bool io_kbuf_commit(struct io_kiocb *req,  in io_kbuf_commit()  argument
125 	if (unlikely(!(req->flags & REQ_F_BUFFERS_COMMIT)))  in io_kbuf_commit()
128 	req->flags &= ~REQ_F_BUFFERS_COMMIT;  in io_kbuf_commit()
150 static inline bool __io_put_kbuf_ring(struct io_kiocb *req, int len, int nr)  in __io_put_kbuf_ring()  argument
152 	struct io_buffer_list *bl = req->buf_list;  in __io_put_kbuf_ring()
156 		ret = io_kbuf_commit(req, bl, len, nr);  in __io_put_kbuf_ring()
157 		req->buf_index = bl->bgid;  in __io_put_kbuf_ring()
159 	req->flags &= ~REQ_F_BUFFER_RING;  in __io_put_kbuf_ring()
163 static inline void __io_put_kbuf_list(struct io_kiocb *req, int len,  in __io_put_kbuf_list()  argument
166 	if (req->flags & REQ_F_BUFFER_RING) {  in __io_put_kbuf_list()
167 		__io_put_kbuf_ring(req, len, 1);  in __io_put_kbuf_list()
169 		req->buf_index = req->kbuf->bgid;  in __io_put_kbuf_list()
170 		list_add(&req->kbuf->list, list);  in __io_put_kbuf_list()
171 		req->flags &= ~REQ_F_BUFFER_SELECTED;  in __io_put_kbuf_list()
175 static inline void io_kbuf_drop(struct io_kiocb *req)  in io_kbuf_drop()  argument
177 	lockdep_assert_held(&req->ctx->completion_lock);  in io_kbuf_drop()
179 	if (!(req->flags & (REQ_F_BUFFER_SELECTED|REQ_F_BUFFER_RING)))  in io_kbuf_drop()
183 	__io_put_kbuf_list(req, 0, &req->ctx->io_buffers_comp);  in io_kbuf_drop()
186 static inline unsigned int __io_put_kbufs(struct io_kiocb *req, int len,  in __io_put_kbufs()  argument
191 	if (!(req->flags & (REQ_F_BUFFER_RING | REQ_F_BUFFER_SELECTED)))  in __io_put_kbufs()
194 	ret = IORING_CQE_F_BUFFER | (req->buf_index << IORING_CQE_BUFFER_SHIFT);  in __io_put_kbufs()
195 	if (req->flags & REQ_F_BUFFER_RING) {  in __io_put_kbufs()
196 		if (!__io_put_kbuf_ring(req, len, nbufs))  in __io_put_kbufs()
199 		__io_put_kbuf(req, len, issue_flags);  in __io_put_kbufs()
204 static inline unsigned int io_put_kbuf(struct io_kiocb *req, int len,  in io_put_kbuf()  argument
207 	return __io_put_kbufs(req, len, 1, issue_flags);  in io_put_kbuf()
210 static inline unsigned int io_put_kbufs(struct io_kiocb *req, int len,  in io_put_kbufs()  argument
213 	return __io_put_kbufs(req, len, nbufs, issue_flags);  in io_put_kbufs()