forked from Minki/linux
139 lines
4.0 KiB
C
139 lines
4.0 KiB
C
#ifndef IOU_CORE_H
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#define IOU_CORE_H
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#include <linux/errno.h>
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#include <linux/lockdep.h>
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#include "io_uring_types.h"
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enum {
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IOU_OK = 0,
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IOU_ISSUE_SKIP_COMPLETE = -EIOCBQUEUED,
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};
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static inline void req_set_fail(struct io_kiocb *req)
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{
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req->flags |= REQ_F_FAIL;
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if (req->flags & REQ_F_CQE_SKIP) {
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req->flags &= ~REQ_F_CQE_SKIP;
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req->flags |= REQ_F_SKIP_LINK_CQES;
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}
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}
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static inline void io_req_set_res(struct io_kiocb *req, s32 res, u32 cflags)
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{
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req->cqe.res = res;
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req->cqe.flags = cflags;
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}
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static inline bool req_has_async_data(struct io_kiocb *req)
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{
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return req->flags & REQ_F_ASYNC_DATA;
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}
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static inline void io_put_file(struct file *file)
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{
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if (file)
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fput(file);
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}
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static inline void io_ring_submit_unlock(struct io_ring_ctx *ctx,
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unsigned issue_flags)
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{
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lockdep_assert_held(&ctx->uring_lock);
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if (issue_flags & IO_URING_F_UNLOCKED)
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mutex_unlock(&ctx->uring_lock);
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}
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static inline void io_ring_submit_lock(struct io_ring_ctx *ctx,
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unsigned issue_flags)
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{
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/*
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* "Normal" inline submissions always hold the uring_lock, since we
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* grab it from the system call. Same is true for the SQPOLL offload.
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* The only exception is when we've detached the request and issue it
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* from an async worker thread, grab the lock for that case.
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*/
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if (issue_flags & IO_URING_F_UNLOCKED)
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mutex_lock(&ctx->uring_lock);
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lockdep_assert_held(&ctx->uring_lock);
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}
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static inline void io_commit_cqring(struct io_ring_ctx *ctx)
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{
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/* order cqe stores with ring update */
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smp_store_release(&ctx->rings->cq.tail, ctx->cached_cq_tail);
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}
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static inline bool io_sqring_full(struct io_ring_ctx *ctx)
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{
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struct io_rings *r = ctx->rings;
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return READ_ONCE(r->sq.tail) - ctx->cached_sq_head == ctx->sq_entries;
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}
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static inline unsigned int io_sqring_entries(struct io_ring_ctx *ctx)
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{
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struct io_rings *rings = ctx->rings;
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/* make sure SQ entry isn't read before tail */
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return smp_load_acquire(&rings->sq.tail) - ctx->cached_sq_head;
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}
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static inline bool io_run_task_work(void)
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{
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if (test_thread_flag(TIF_NOTIFY_SIGNAL) || task_work_pending(current)) {
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__set_current_state(TASK_RUNNING);
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clear_notify_signal();
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if (task_work_pending(current))
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task_work_run();
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return true;
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}
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return false;
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}
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int io_run_task_work_sig(void);
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void io_req_complete_failed(struct io_kiocb *req, s32 res);
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void __io_req_complete(struct io_kiocb *req, unsigned issue_flags);
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void io_req_complete_post(struct io_kiocb *req);
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void __io_req_complete_post(struct io_kiocb *req);
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bool io_fill_cqe_aux(struct io_ring_ctx *ctx, u64 user_data, s32 res,
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u32 cflags);
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void io_cqring_ev_posted(struct io_ring_ctx *ctx);
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struct page **io_pin_pages(unsigned long ubuf, unsigned long len, int *npages);
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struct file *io_file_get_normal(struct io_kiocb *req, int fd);
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struct file *io_file_get_fixed(struct io_kiocb *req, int fd,
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unsigned issue_flags);
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bool io_is_uring_fops(struct file *file);
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bool io_alloc_async_data(struct io_kiocb *req);
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void io_req_task_work_add(struct io_kiocb *req);
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void io_req_tw_post_queue(struct io_kiocb *req, s32 res, u32 cflags);
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void io_req_task_complete(struct io_kiocb *req, bool *locked);
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void io_req_task_queue_fail(struct io_kiocb *req, int ret);
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void io_req_task_submit(struct io_kiocb *req, bool *locked);
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void tctx_task_work(struct callback_head *cb);
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__cold void io_uring_cancel_generic(bool cancel_all, struct io_sq_data *sqd);
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int io_uring_alloc_task_context(struct task_struct *task,
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struct io_ring_ctx *ctx);
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int io_poll_issue(struct io_kiocb *req, bool *locked);
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int io_submit_sqes(struct io_ring_ctx *ctx, unsigned int nr);
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int io_do_iopoll(struct io_ring_ctx *ctx, bool force_nonspin);
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struct io_wq_work *io_wq_free_work(struct io_wq_work *work);
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void io_wq_submit_work(struct io_wq_work *work);
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void io_free_req(struct io_kiocb *req);
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void io_queue_next(struct io_kiocb *req);
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bool io_match_task_safe(struct io_kiocb *head, struct task_struct *task,
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bool cancel_all);
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#define io_for_each_link(pos, head) \
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for (pos = (head); pos; pos = pos->link)
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#endif
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