1de23077eSJens Axboe #ifndef IOU_CORE_H 2de23077eSJens Axboe #define IOU_CORE_H 3de23077eSJens Axboe 4de23077eSJens Axboe #include <linux/errno.h> 5cd40cae2SJens Axboe #include <linux/lockdep.h> 6ab1c84d8SPavel Begunkov #include <linux/io_uring_types.h> 744648532SJens Axboe #include <uapi/linux/eventpoll.h> 8ab1c84d8SPavel Begunkov #include "io-wq.h" 9a6b21fbbSPavel Begunkov #include "slist.h" 10ab1c84d8SPavel Begunkov #include "filetable.h" 11de23077eSJens Axboe 12f3b44f92SJens Axboe #ifndef CREATE_TRACE_POINTS 13f3b44f92SJens Axboe #include <trace/events/io_uring.h> 14f3b44f92SJens Axboe #endif 15f3b44f92SJens Axboe 1697b388d7SJens Axboe enum { 1797b388d7SJens Axboe IOU_OK = 0, 1897b388d7SJens Axboe IOU_ISSUE_SKIP_COMPLETE = -EIOCBQUEUED, 19114eccdfSDylan Yudaken 20114eccdfSDylan Yudaken /* 2191482864SPavel Begunkov * Intended only when both IO_URING_F_MULTISHOT is passed 2291482864SPavel Begunkov * to indicate to the poll runner that multishot should be 23114eccdfSDylan Yudaken * removed and the result is set on req->cqe.res. 24114eccdfSDylan Yudaken */ 25114eccdfSDylan Yudaken IOU_STOP_MULTISHOT = -ECANCELED, 2697b388d7SJens Axboe }; 2797b388d7SJens Axboe 28aa1df3a3SPavel Begunkov struct io_uring_cqe *__io_get_cqe(struct io_ring_ctx *ctx, bool overflow); 2968494a65SPavel Begunkov bool io_req_cqe_overflow(struct io_kiocb *req); 30c0e0d6baSDylan Yudaken int io_run_task_work_sig(struct io_ring_ctx *ctx); 31b3026767SDylan Yudaken int __io_run_local_work(struct io_ring_ctx *ctx, bool *locked); 32c0e0d6baSDylan Yudaken int io_run_local_work(struct io_ring_ctx *ctx); 33973fc83fSDylan Yudaken void io_req_defer_failed(struct io_kiocb *req, s32 res); 341bec951cSPavel Begunkov void io_req_complete_post(struct io_kiocb *req, unsigned issue_flags); 35*b529c96aSDylan Yudaken bool io_post_aux_cqe(struct io_ring_ctx *ctx, u64 user_data, s32 res, u32 cflags); 369b8c5475SDylan Yudaken bool io_aux_cqe(struct io_ring_ctx *ctx, bool defer, u64 user_data, s32 res, u32 cflags, 379b8c5475SDylan Yudaken bool allow_overflow); 389046c641SPavel Begunkov void __io_commit_cqring_flush(struct io_ring_ctx *ctx); 399046c641SPavel Begunkov 401bec951cSPavel Begunkov static inline void io_req_complete_post_tw(struct io_kiocb *req, bool *locked) 411bec951cSPavel Begunkov { 421bec951cSPavel Begunkov unsigned flags = *locked ? 0 : IO_URING_F_UNLOCKED; 431bec951cSPavel Begunkov 441bec951cSPavel Begunkov io_req_complete_post(req, flags); 451bec951cSPavel Begunkov } 461bec951cSPavel Begunkov 479046c641SPavel Begunkov struct page **io_pin_pages(unsigned long ubuf, unsigned long len, int *npages); 489046c641SPavel Begunkov 499046c641SPavel Begunkov struct file *io_file_get_normal(struct io_kiocb *req, int fd); 509046c641SPavel Begunkov struct file *io_file_get_fixed(struct io_kiocb *req, int fd, 519046c641SPavel Begunkov unsigned issue_flags); 529046c641SPavel Begunkov 53f6b543fdSJens Axboe static inline bool io_req_ffs_set(struct io_kiocb *req) 54f6b543fdSJens Axboe { 55f6b543fdSJens Axboe return req->flags & REQ_F_FIXED_FILE; 56f6b543fdSJens Axboe } 57f6b543fdSJens Axboe 58e52d2e58SPavel Begunkov void __io_req_task_work_add(struct io_kiocb *req, bool allow_local); 599046c641SPavel Begunkov bool io_is_uring_fops(struct file *file); 609046c641SPavel Begunkov bool io_alloc_async_data(struct io_kiocb *req); 619046c641SPavel Begunkov void io_req_task_queue(struct io_kiocb *req); 629046c641SPavel Begunkov void io_queue_iowq(struct io_kiocb *req, bool *dont_use); 639046c641SPavel Begunkov void io_req_task_complete(struct io_kiocb *req, bool *locked); 649046c641SPavel Begunkov void io_req_task_queue_fail(struct io_kiocb *req, int ret); 659046c641SPavel Begunkov void io_req_task_submit(struct io_kiocb *req, bool *locked); 669046c641SPavel Begunkov void tctx_task_work(struct callback_head *cb); 679046c641SPavel Begunkov __cold void io_uring_cancel_generic(bool cancel_all, struct io_sq_data *sqd); 689046c641SPavel Begunkov int io_uring_alloc_task_context(struct task_struct *task, 699046c641SPavel Begunkov struct io_ring_ctx *ctx); 709046c641SPavel Begunkov 719046c641SPavel Begunkov int io_poll_issue(struct io_kiocb *req, bool *locked); 729046c641SPavel Begunkov int io_submit_sqes(struct io_ring_ctx *ctx, unsigned int nr); 739046c641SPavel Begunkov int io_do_iopoll(struct io_ring_ctx *ctx, bool force_nonspin); 749046c641SPavel Begunkov void io_free_batch_list(struct io_ring_ctx *ctx, struct io_wq_work_node *node); 759046c641SPavel Begunkov int io_req_prep_async(struct io_kiocb *req); 769046c641SPavel Begunkov 779046c641SPavel Begunkov struct io_wq_work *io_wq_free_work(struct io_wq_work *work); 789046c641SPavel Begunkov void io_wq_submit_work(struct io_wq_work *work); 799046c641SPavel Begunkov 809046c641SPavel Begunkov void io_free_req(struct io_kiocb *req); 819046c641SPavel Begunkov void io_queue_next(struct io_kiocb *req); 82e70cb608SPavel Begunkov void __io_put_task(struct task_struct *task, int nr); 8363809137SPavel Begunkov void io_task_refs_refill(struct io_uring_task *tctx); 84bd1a3783SPavel Begunkov bool __io_alloc_req_refill(struct io_ring_ctx *ctx); 859046c641SPavel Begunkov 869046c641SPavel Begunkov bool io_match_task_safe(struct io_kiocb *head, struct task_struct *task, 879046c641SPavel Begunkov bool cancel_all); 889046c641SPavel Begunkov 89e52d2e58SPavel Begunkov static inline void io_req_task_work_add(struct io_kiocb *req) 90e52d2e58SPavel Begunkov { 91e52d2e58SPavel Begunkov __io_req_task_work_add(req, true); 92e52d2e58SPavel Begunkov } 93e52d2e58SPavel Begunkov 949046c641SPavel Begunkov #define io_for_each_link(pos, head) \ 959046c641SPavel Begunkov for (pos = (head); pos; pos = pos->link) 96f3b44f92SJens Axboe 9725399321SPavel Begunkov static inline void io_cq_lock(struct io_ring_ctx *ctx) 9825399321SPavel Begunkov __acquires(ctx->completion_lock) 9925399321SPavel Begunkov { 10025399321SPavel Begunkov spin_lock(&ctx->completion_lock); 10125399321SPavel Begunkov } 10225399321SPavel Begunkov 10325399321SPavel Begunkov void io_cq_unlock_post(struct io_ring_ctx *ctx); 10425399321SPavel Begunkov 105aa1df3a3SPavel Begunkov static inline struct io_uring_cqe *io_get_cqe_overflow(struct io_ring_ctx *ctx, 106aa1df3a3SPavel Begunkov bool overflow) 107f3b44f92SJens Axboe { 108f3b44f92SJens Axboe if (likely(ctx->cqe_cached < ctx->cqe_sentinel)) { 109f3b44f92SJens Axboe struct io_uring_cqe *cqe = ctx->cqe_cached; 110f3b44f92SJens Axboe 111f3b44f92SJens Axboe ctx->cached_cq_tail++; 112f3b44f92SJens Axboe ctx->cqe_cached++; 113b3659a65SPavel Begunkov if (ctx->flags & IORING_SETUP_CQE32) 114b3659a65SPavel Begunkov ctx->cqe_cached++; 115f3b44f92SJens Axboe return cqe; 116f3b44f92SJens Axboe } 117f3b44f92SJens Axboe 118aa1df3a3SPavel Begunkov return __io_get_cqe(ctx, overflow); 119aa1df3a3SPavel Begunkov } 120aa1df3a3SPavel Begunkov 121aa1df3a3SPavel Begunkov static inline struct io_uring_cqe *io_get_cqe(struct io_ring_ctx *ctx) 122aa1df3a3SPavel Begunkov { 123aa1df3a3SPavel Begunkov return io_get_cqe_overflow(ctx, false); 124f3b44f92SJens Axboe } 125f3b44f92SJens Axboe 126f3b44f92SJens Axboe static inline bool __io_fill_cqe_req(struct io_ring_ctx *ctx, 127f3b44f92SJens Axboe struct io_kiocb *req) 128f3b44f92SJens Axboe { 129f3b44f92SJens Axboe struct io_uring_cqe *cqe; 130f3b44f92SJens Axboe 131f3b44f92SJens Axboe /* 132f3b44f92SJens Axboe * If we can't get a cq entry, userspace overflowed the 133f3b44f92SJens Axboe * submission (by quite a lot). Increment the overflow count in 134f3b44f92SJens Axboe * the ring. 135f3b44f92SJens Axboe */ 136f3b44f92SJens Axboe cqe = io_get_cqe(ctx); 137e8c328c3SPavel Begunkov if (unlikely(!cqe)) 138e8c328c3SPavel Begunkov return io_req_cqe_overflow(req); 139e0486f3fSDylan Yudaken 140e0486f3fSDylan Yudaken trace_io_uring_complete(req->ctx, req, req->cqe.user_data, 141e0486f3fSDylan Yudaken req->cqe.res, req->cqe.flags, 142e0486f3fSDylan Yudaken (req->flags & REQ_F_CQE32_INIT) ? req->extra1 : 0, 143e0486f3fSDylan Yudaken (req->flags & REQ_F_CQE32_INIT) ? req->extra2 : 0); 144e0486f3fSDylan Yudaken 145f3b44f92SJens Axboe memcpy(cqe, &req->cqe, sizeof(*cqe)); 146e8c328c3SPavel Begunkov 147e8c328c3SPavel Begunkov if (ctx->flags & IORING_SETUP_CQE32) { 148f3b44f92SJens Axboe u64 extra1 = 0, extra2 = 0; 149f3b44f92SJens Axboe 150f3b44f92SJens Axboe if (req->flags & REQ_F_CQE32_INIT) { 151f3b44f92SJens Axboe extra1 = req->extra1; 152f3b44f92SJens Axboe extra2 = req->extra2; 153f3b44f92SJens Axboe } 154f3b44f92SJens Axboe 155f3b44f92SJens Axboe WRITE_ONCE(cqe->big_cqe[0], extra1); 156f3b44f92SJens Axboe WRITE_ONCE(cqe->big_cqe[1], extra2); 157e8c328c3SPavel Begunkov } 158f3b44f92SJens Axboe return true; 159f3b44f92SJens Axboe } 160f3b44f92SJens Axboe 161531113bbSJens Axboe static inline void req_set_fail(struct io_kiocb *req) 162531113bbSJens Axboe { 163531113bbSJens Axboe req->flags |= REQ_F_FAIL; 164531113bbSJens Axboe if (req->flags & REQ_F_CQE_SKIP) { 165531113bbSJens Axboe req->flags &= ~REQ_F_CQE_SKIP; 166531113bbSJens Axboe req->flags |= REQ_F_SKIP_LINK_CQES; 167531113bbSJens Axboe } 168531113bbSJens Axboe } 169531113bbSJens Axboe 170de23077eSJens Axboe static inline void io_req_set_res(struct io_kiocb *req, s32 res, u32 cflags) 171de23077eSJens Axboe { 172de23077eSJens Axboe req->cqe.res = res; 173de23077eSJens Axboe req->cqe.flags = cflags; 174de23077eSJens Axboe } 175de23077eSJens Axboe 17699f15d8dSJens Axboe static inline bool req_has_async_data(struct io_kiocb *req) 17799f15d8dSJens Axboe { 17899f15d8dSJens Axboe return req->flags & REQ_F_ASYNC_DATA; 17999f15d8dSJens Axboe } 18099f15d8dSJens Axboe 181531113bbSJens Axboe static inline void io_put_file(struct file *file) 182531113bbSJens Axboe { 183531113bbSJens Axboe if (file) 184531113bbSJens Axboe fput(file); 185531113bbSJens Axboe } 186531113bbSJens Axboe 187cd40cae2SJens Axboe static inline void io_ring_submit_unlock(struct io_ring_ctx *ctx, 188cd40cae2SJens Axboe unsigned issue_flags) 189cd40cae2SJens Axboe { 190cd40cae2SJens Axboe lockdep_assert_held(&ctx->uring_lock); 191cd40cae2SJens Axboe if (issue_flags & IO_URING_F_UNLOCKED) 192cd40cae2SJens Axboe mutex_unlock(&ctx->uring_lock); 193cd40cae2SJens Axboe } 194cd40cae2SJens Axboe 195cd40cae2SJens Axboe static inline void io_ring_submit_lock(struct io_ring_ctx *ctx, 196cd40cae2SJens Axboe unsigned issue_flags) 197cd40cae2SJens Axboe { 198cd40cae2SJens Axboe /* 199cd40cae2SJens Axboe * "Normal" inline submissions always hold the uring_lock, since we 200cd40cae2SJens Axboe * grab it from the system call. Same is true for the SQPOLL offload. 201cd40cae2SJens Axboe * The only exception is when we've detached the request and issue it 202cd40cae2SJens Axboe * from an async worker thread, grab the lock for that case. 203cd40cae2SJens Axboe */ 204cd40cae2SJens Axboe if (issue_flags & IO_URING_F_UNLOCKED) 205cd40cae2SJens Axboe mutex_lock(&ctx->uring_lock); 206cd40cae2SJens Axboe lockdep_assert_held(&ctx->uring_lock); 207cd40cae2SJens Axboe } 208cd40cae2SJens Axboe 209f9ead18cSJens Axboe static inline void io_commit_cqring(struct io_ring_ctx *ctx) 210f9ead18cSJens Axboe { 211f9ead18cSJens Axboe /* order cqe stores with ring update */ 212f9ead18cSJens Axboe smp_store_release(&ctx->rings->cq.tail, ctx->cached_cq_tail); 213f9ead18cSJens Axboe } 214f9ead18cSJens Axboe 215fc86f9d3SPavel Begunkov /* requires smb_mb() prior, see wq_has_sleeper() */ 216fc86f9d3SPavel Begunkov static inline void __io_cqring_wake(struct io_ring_ctx *ctx) 217f3b44f92SJens Axboe { 218f3b44f92SJens Axboe /* 21944648532SJens Axboe * Trigger waitqueue handler on all waiters on our waitqueue. This 22044648532SJens Axboe * won't necessarily wake up all the tasks, io_should_wake() will make 22144648532SJens Axboe * that decision. 22244648532SJens Axboe * 22344648532SJens Axboe * Pass in EPOLLIN|EPOLL_URING_WAKE as the poll wakeup key. The latter 22444648532SJens Axboe * set in the mask so that if we recurse back into our own poll 22544648532SJens Axboe * waitqueue handlers, we know we have a dependency between eventfd or 22644648532SJens Axboe * epoll and should terminate multishot poll at that point. 227f3b44f92SJens Axboe */ 228fc86f9d3SPavel Begunkov if (waitqueue_active(&ctx->cq_wait)) 22944648532SJens Axboe __wake_up(&ctx->cq_wait, TASK_NORMAL, 0, 23044648532SJens Axboe poll_to_key(EPOLL_URING_WAKE | EPOLLIN)); 231f3b44f92SJens Axboe } 232f3b44f92SJens Axboe 233fc86f9d3SPavel Begunkov static inline void io_cqring_wake(struct io_ring_ctx *ctx) 234fc86f9d3SPavel Begunkov { 235fc86f9d3SPavel Begunkov smp_mb(); 236fc86f9d3SPavel Begunkov __io_cqring_wake(ctx); 237fc86f9d3SPavel Begunkov } 238fc86f9d3SPavel Begunkov 23917437f31SJens Axboe static inline bool io_sqring_full(struct io_ring_ctx *ctx) 24017437f31SJens Axboe { 24117437f31SJens Axboe struct io_rings *r = ctx->rings; 24217437f31SJens Axboe 24317437f31SJens Axboe return READ_ONCE(r->sq.tail) - ctx->cached_sq_head == ctx->sq_entries; 24417437f31SJens Axboe } 24517437f31SJens Axboe 24617437f31SJens Axboe static inline unsigned int io_sqring_entries(struct io_ring_ctx *ctx) 24717437f31SJens Axboe { 24817437f31SJens Axboe struct io_rings *rings = ctx->rings; 24917437f31SJens Axboe 25017437f31SJens Axboe /* make sure SQ entry isn't read before tail */ 25117437f31SJens Axboe return smp_load_acquire(&rings->sq.tail) - ctx->cached_sq_head; 25217437f31SJens Axboe } 25317437f31SJens Axboe 254c0e0d6baSDylan Yudaken static inline int io_run_task_work(void) 25517437f31SJens Axboe { 25646a525e1SJens Axboe if (task_work_pending(current)) { 25746a525e1SJens Axboe if (test_thread_flag(TIF_NOTIFY_SIGNAL)) 25817437f31SJens Axboe clear_notify_signal(); 25946a525e1SJens Axboe __set_current_state(TASK_RUNNING); 26017437f31SJens Axboe task_work_run(); 261c0e0d6baSDylan Yudaken return 1; 26217437f31SJens Axboe } 26317437f31SJens Axboe 264c0e0d6baSDylan Yudaken return 0; 265c0e0d6baSDylan Yudaken } 266c0e0d6baSDylan Yudaken 267dac6a0eaSJens Axboe static inline bool io_task_work_pending(struct io_ring_ctx *ctx) 268dac6a0eaSJens Axboe { 269dac6a0eaSJens Axboe return test_thread_flag(TIF_NOTIFY_SIGNAL) || 270dac6a0eaSJens Axboe !wq_list_empty(&ctx->work_llist); 271dac6a0eaSJens Axboe } 272dac6a0eaSJens Axboe 273c0e0d6baSDylan Yudaken static inline int io_run_task_work_ctx(struct io_ring_ctx *ctx) 274c0e0d6baSDylan Yudaken { 275c0e0d6baSDylan Yudaken int ret = 0; 276c0e0d6baSDylan Yudaken int ret2; 277c0e0d6baSDylan Yudaken 278c0e0d6baSDylan Yudaken if (ctx->flags & IORING_SETUP_DEFER_TASKRUN) 279c0e0d6baSDylan Yudaken ret = io_run_local_work(ctx); 280c0e0d6baSDylan Yudaken 281c0e0d6baSDylan Yudaken /* want to run this after in case more is added */ 282c0e0d6baSDylan Yudaken ret2 = io_run_task_work(); 283c0e0d6baSDylan Yudaken 284c0e0d6baSDylan Yudaken /* Try propagate error in favour of if tasks were run, 285c0e0d6baSDylan Yudaken * but still make sure to run them if requested 286c0e0d6baSDylan Yudaken */ 287c0e0d6baSDylan Yudaken if (ret >= 0) 288c0e0d6baSDylan Yudaken ret += ret2; 289c0e0d6baSDylan Yudaken 290c0e0d6baSDylan Yudaken return ret; 29117437f31SJens Axboe } 29217437f31SJens Axboe 29344f87745SPavel Begunkov static inline int io_run_local_work_locked(struct io_ring_ctx *ctx) 29444f87745SPavel Begunkov { 295b3026767SDylan Yudaken bool locked; 296b3026767SDylan Yudaken int ret; 297b3026767SDylan Yudaken 29844f87745SPavel Begunkov if (llist_empty(&ctx->work_llist)) 29944f87745SPavel Begunkov return 0; 300b3026767SDylan Yudaken 301b3026767SDylan Yudaken locked = true; 302b3026767SDylan Yudaken ret = __io_run_local_work(ctx, &locked); 303b3026767SDylan Yudaken /* shouldn't happen! */ 304b3026767SDylan Yudaken if (WARN_ON_ONCE(!locked)) 305b3026767SDylan Yudaken mutex_lock(&ctx->uring_lock); 306b3026767SDylan Yudaken return ret; 30744f87745SPavel Begunkov } 30844f87745SPavel Begunkov 309aa1e90f6SPavel Begunkov static inline void io_tw_lock(struct io_ring_ctx *ctx, bool *locked) 310aa1e90f6SPavel Begunkov { 311aa1e90f6SPavel Begunkov if (!*locked) { 312aa1e90f6SPavel Begunkov mutex_lock(&ctx->uring_lock); 313aa1e90f6SPavel Begunkov *locked = true; 314aa1e90f6SPavel Begunkov } 315aa1e90f6SPavel Begunkov } 316aa1e90f6SPavel Begunkov 3179da070b1SPavel Begunkov /* 3189da070b1SPavel Begunkov * Don't complete immediately but use deferred completion infrastructure. 3199da070b1SPavel Begunkov * Protected by ->uring_lock and can only be used either with 3209da070b1SPavel Begunkov * IO_URING_F_COMPLETE_DEFER or inside a tw handler holding the mutex. 3219da070b1SPavel Begunkov */ 3229da070b1SPavel Begunkov static inline void io_req_complete_defer(struct io_kiocb *req) 3239da070b1SPavel Begunkov __must_hold(&req->ctx->uring_lock) 324aa1e90f6SPavel Begunkov { 325aa1e90f6SPavel Begunkov struct io_submit_state *state = &req->ctx->submit_state; 326aa1e90f6SPavel Begunkov 3279da070b1SPavel Begunkov lockdep_assert_held(&req->ctx->uring_lock); 3289da070b1SPavel Begunkov 329aa1e90f6SPavel Begunkov wq_list_add_tail(&req->comp_list, &state->compl_reqs); 330aa1e90f6SPavel Begunkov } 331aa1e90f6SPavel Begunkov 33246929b08SPavel Begunkov static inline void io_commit_cqring_flush(struct io_ring_ctx *ctx) 33346929b08SPavel Begunkov { 33446929b08SPavel Begunkov if (unlikely(ctx->off_timeout_used || ctx->drain_active || ctx->has_evfd)) 33546929b08SPavel Begunkov __io_commit_cqring_flush(ctx); 33646929b08SPavel Begunkov } 33746929b08SPavel Begunkov 338e70cb608SPavel Begunkov /* must to be called somewhat shortly after putting a request */ 339e70cb608SPavel Begunkov static inline void io_put_task(struct task_struct *task, int nr) 340e70cb608SPavel Begunkov { 341e70cb608SPavel Begunkov if (likely(task == current)) 342e70cb608SPavel Begunkov task->io_uring->cached_refs += nr; 343e70cb608SPavel Begunkov else 344e70cb608SPavel Begunkov __io_put_task(task, nr); 345e70cb608SPavel Begunkov } 346e70cb608SPavel Begunkov 34763809137SPavel Begunkov static inline void io_get_task_refs(int nr) 34863809137SPavel Begunkov { 34963809137SPavel Begunkov struct io_uring_task *tctx = current->io_uring; 35063809137SPavel Begunkov 35163809137SPavel Begunkov tctx->cached_refs -= nr; 35263809137SPavel Begunkov if (unlikely(tctx->cached_refs < 0)) 35363809137SPavel Begunkov io_task_refs_refill(tctx); 35463809137SPavel Begunkov } 35563809137SPavel Begunkov 356bd1a3783SPavel Begunkov static inline bool io_req_cache_empty(struct io_ring_ctx *ctx) 357bd1a3783SPavel Begunkov { 358bd1a3783SPavel Begunkov return !ctx->submit_state.free_list.next; 359bd1a3783SPavel Begunkov } 360bd1a3783SPavel Begunkov 361bd1a3783SPavel Begunkov static inline bool io_alloc_req_refill(struct io_ring_ctx *ctx) 362bd1a3783SPavel Begunkov { 363bd1a3783SPavel Begunkov if (unlikely(io_req_cache_empty(ctx))) 364bd1a3783SPavel Begunkov return __io_alloc_req_refill(ctx); 365bd1a3783SPavel Begunkov return true; 366bd1a3783SPavel Begunkov } 367bd1a3783SPavel Begunkov 368bd1a3783SPavel Begunkov static inline struct io_kiocb *io_alloc_req(struct io_ring_ctx *ctx) 369bd1a3783SPavel Begunkov { 370bd1a3783SPavel Begunkov struct io_wq_work_node *node; 371bd1a3783SPavel Begunkov 372bd1a3783SPavel Begunkov node = wq_stack_extract(&ctx->submit_state.free_list); 373bd1a3783SPavel Begunkov return container_of(node, struct io_kiocb, comp_list); 374bd1a3783SPavel Begunkov } 375bd1a3783SPavel Begunkov 37676de6749SPavel Begunkov static inline bool io_allowed_run_tw(struct io_ring_ctx *ctx) 37776de6749SPavel Begunkov { 3786567506bSPavel Begunkov return likely(!(ctx->flags & IORING_SETUP_DEFER_TASKRUN) || 3796567506bSPavel Begunkov ctx->submitter_task == current); 38076de6749SPavel Begunkov } 38176de6749SPavel Begunkov 382833b5dffSPavel Begunkov static inline void io_req_queue_tw_complete(struct io_kiocb *req, s32 res) 383833b5dffSPavel Begunkov { 384833b5dffSPavel Begunkov io_req_set_res(req, res, 0); 385833b5dffSPavel Begunkov req->io_task_work.func = io_req_task_complete; 386833b5dffSPavel Begunkov io_req_task_work_add(req); 387833b5dffSPavel Begunkov } 388833b5dffSPavel Begunkov 389de23077eSJens Axboe #endif 390