1 // SPDX-License-Identifier: GPL-2.0 2 3 #include <linux/pagemap.h> 4 5 struct io_meta_state { 6 u32 seed; 7 struct iov_iter_state iter_meta; 8 }; 9 10 struct io_async_rw { 11 size_t bytes_done; 12 struct iov_iter iter; 13 struct iov_iter_state iter_state; 14 struct iovec fast_iov; 15 struct iovec *free_iovec; 16 int free_iov_nr; 17 /* wpq is for buffered io, while meta fields are used with direct io */ 18 union { 19 struct wait_page_queue wpq; 20 struct { 21 struct uio_meta meta; 22 struct io_meta_state meta_state; 23 }; 24 }; 25 }; 26 27 int io_prep_read_fixed(struct io_kiocb *req, const struct io_uring_sqe *sqe); 28 int io_prep_write_fixed(struct io_kiocb *req, const struct io_uring_sqe *sqe); 29 int io_prep_readv(struct io_kiocb *req, const struct io_uring_sqe *sqe); 30 int io_prep_writev(struct io_kiocb *req, const struct io_uring_sqe *sqe); 31 int io_prep_read(struct io_kiocb *req, const struct io_uring_sqe *sqe); 32 int io_prep_write(struct io_kiocb *req, const struct io_uring_sqe *sqe); 33 int io_read(struct io_kiocb *req, unsigned int issue_flags); 34 int io_write(struct io_kiocb *req, unsigned int issue_flags); 35 void io_readv_writev_cleanup(struct io_kiocb *req); 36 void io_rw_fail(struct io_kiocb *req); 37 void io_req_rw_complete(struct io_kiocb *req, struct io_tw_state *ts); 38 int io_read_mshot_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe); 39 int io_read_mshot(struct io_kiocb *req, unsigned int issue_flags); 40 void io_rw_cache_free(const void *entry); 41