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); 33*973fc83fSDylan 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); 3552120f0fSDylan Yudaken bool io_post_aux_cqe(struct io_ring_ctx *ctx, u64 user_data, s32 res, u32 cflags, 3652120f0fSDylan Yudaken bool allow_overflow); 37eb42cebbSPavel Begunkov bool io_fill_cqe_aux(struct io_ring_ctx *ctx, u64 user_data, s32 res, u32 cflags, 38eb42cebbSPavel Begunkov bool allow_overflow); 399046c641SPavel Begunkov void __io_commit_cqring_flush(struct io_ring_ctx *ctx); 409046c641SPavel Begunkov 411bec951cSPavel Begunkov static inline void io_req_complete_post_tw(struct io_kiocb *req, bool *locked) 421bec951cSPavel Begunkov { 431bec951cSPavel Begunkov unsigned flags = *locked ? 0 : IO_URING_F_UNLOCKED; 441bec951cSPavel Begunkov 451bec951cSPavel Begunkov io_req_complete_post(req, flags); 461bec951cSPavel Begunkov } 471bec951cSPavel Begunkov 489046c641SPavel Begunkov struct page **io_pin_pages(unsigned long ubuf, unsigned long len, int *npages); 499046c641SPavel Begunkov 509046c641SPavel Begunkov struct file *io_file_get_normal(struct io_kiocb *req, int fd); 519046c641SPavel Begunkov struct file *io_file_get_fixed(struct io_kiocb *req, int fd, 529046c641SPavel Begunkov unsigned issue_flags); 539046c641SPavel Begunkov 54f6b543fdSJens Axboe static inline bool io_req_ffs_set(struct io_kiocb *req) 55f6b543fdSJens Axboe { 56f6b543fdSJens Axboe return req->flags & REQ_F_FIXED_FILE; 57f6b543fdSJens Axboe } 58f6b543fdSJens Axboe 59e52d2e58SPavel Begunkov void __io_req_task_work_add(struct io_kiocb *req, bool allow_local); 609046c641SPavel Begunkov bool io_is_uring_fops(struct file *file); 619046c641SPavel Begunkov bool io_alloc_async_data(struct io_kiocb *req); 629046c641SPavel Begunkov void io_req_task_queue(struct io_kiocb *req); 639046c641SPavel Begunkov void io_queue_iowq(struct io_kiocb *req, bool *dont_use); 649046c641SPavel Begunkov void io_req_task_complete(struct io_kiocb *req, bool *locked); 659046c641SPavel Begunkov void io_req_task_queue_fail(struct io_kiocb *req, int ret); 669046c641SPavel Begunkov void io_req_task_submit(struct io_kiocb *req, bool *locked); 679046c641SPavel Begunkov void tctx_task_work(struct callback_head *cb); 689046c641SPavel Begunkov __cold void io_uring_cancel_generic(bool cancel_all, struct io_sq_data *sqd); 699046c641SPavel Begunkov int io_uring_alloc_task_context(struct task_struct *task, 709046c641SPavel Begunkov struct io_ring_ctx *ctx); 719046c641SPavel Begunkov 729046c641SPavel Begunkov int io_poll_issue(struct io_kiocb *req, bool *locked); 739046c641SPavel Begunkov int io_submit_sqes(struct io_ring_ctx *ctx, unsigned int nr); 749046c641SPavel Begunkov int io_do_iopoll(struct io_ring_ctx *ctx, bool force_nonspin); 759046c641SPavel Begunkov void io_free_batch_list(struct io_ring_ctx *ctx, struct io_wq_work_node *node); 769046c641SPavel Begunkov int io_req_prep_async(struct io_kiocb *req); 779046c641SPavel Begunkov 789046c641SPavel Begunkov struct io_wq_work *io_wq_free_work(struct io_wq_work *work); 799046c641SPavel Begunkov void io_wq_submit_work(struct io_wq_work *work); 809046c641SPavel Begunkov 819046c641SPavel Begunkov void io_free_req(struct io_kiocb *req); 829046c641SPavel Begunkov void io_queue_next(struct io_kiocb *req); 83e70cb608SPavel Begunkov void __io_put_task(struct task_struct *task, int nr); 8463809137SPavel Begunkov void io_task_refs_refill(struct io_uring_task *tctx); 85bd1a3783SPavel Begunkov bool __io_alloc_req_refill(struct io_ring_ctx *ctx); 869046c641SPavel Begunkov 879046c641SPavel Begunkov bool io_match_task_safe(struct io_kiocb *head, struct task_struct *task, 889046c641SPavel Begunkov bool cancel_all); 899046c641SPavel Begunkov 90e52d2e58SPavel Begunkov static inline void io_req_task_work_add(struct io_kiocb *req) 91e52d2e58SPavel Begunkov { 92e52d2e58SPavel Begunkov __io_req_task_work_add(req, true); 93e52d2e58SPavel Begunkov } 94e52d2e58SPavel Begunkov 959046c641SPavel Begunkov #define io_for_each_link(pos, head) \ 969046c641SPavel Begunkov for (pos = (head); pos; pos = pos->link) 97f3b44f92SJens Axboe 9825399321SPavel Begunkov static inline void io_cq_lock(struct io_ring_ctx *ctx) 9925399321SPavel Begunkov __acquires(ctx->completion_lock) 10025399321SPavel Begunkov { 10125399321SPavel Begunkov spin_lock(&ctx->completion_lock); 10225399321SPavel Begunkov } 10325399321SPavel Begunkov 10425399321SPavel Begunkov void io_cq_unlock_post(struct io_ring_ctx *ctx); 10525399321SPavel Begunkov 106aa1df3a3SPavel Begunkov static inline struct io_uring_cqe *io_get_cqe_overflow(struct io_ring_ctx *ctx, 107aa1df3a3SPavel Begunkov bool overflow) 108f3b44f92SJens Axboe { 109f3b44f92SJens Axboe if (likely(ctx->cqe_cached < ctx->cqe_sentinel)) { 110f3b44f92SJens Axboe struct io_uring_cqe *cqe = ctx->cqe_cached; 111f3b44f92SJens Axboe 112f3b44f92SJens Axboe ctx->cached_cq_tail++; 113f3b44f92SJens Axboe ctx->cqe_cached++; 114b3659a65SPavel Begunkov if (ctx->flags & IORING_SETUP_CQE32) 115b3659a65SPavel Begunkov ctx->cqe_cached++; 116f3b44f92SJens Axboe return cqe; 117f3b44f92SJens Axboe } 118f3b44f92SJens Axboe 119aa1df3a3SPavel Begunkov return __io_get_cqe(ctx, overflow); 120aa1df3a3SPavel Begunkov } 121aa1df3a3SPavel Begunkov 122aa1df3a3SPavel Begunkov static inline struct io_uring_cqe *io_get_cqe(struct io_ring_ctx *ctx) 123aa1df3a3SPavel Begunkov { 124aa1df3a3SPavel Begunkov return io_get_cqe_overflow(ctx, false); 125f3b44f92SJens Axboe } 126f3b44f92SJens Axboe 127f3b44f92SJens Axboe static inline bool __io_fill_cqe_req(struct io_ring_ctx *ctx, 128f3b44f92SJens Axboe struct io_kiocb *req) 129f3b44f92SJens Axboe { 130f3b44f92SJens Axboe struct io_uring_cqe *cqe; 131f3b44f92SJens Axboe 132f3b44f92SJens Axboe /* 133f3b44f92SJens Axboe * If we can't get a cq entry, userspace overflowed the 134f3b44f92SJens Axboe * submission (by quite a lot). Increment the overflow count in 135f3b44f92SJens Axboe * the ring. 136f3b44f92SJens Axboe */ 137f3b44f92SJens Axboe cqe = io_get_cqe(ctx); 138e8c328c3SPavel Begunkov if (unlikely(!cqe)) 139e8c328c3SPavel Begunkov return io_req_cqe_overflow(req); 140e0486f3fSDylan Yudaken 141e0486f3fSDylan Yudaken trace_io_uring_complete(req->ctx, req, req->cqe.user_data, 142e0486f3fSDylan Yudaken req->cqe.res, req->cqe.flags, 143e0486f3fSDylan Yudaken (req->flags & REQ_F_CQE32_INIT) ? req->extra1 : 0, 144e0486f3fSDylan Yudaken (req->flags & REQ_F_CQE32_INIT) ? req->extra2 : 0); 145e0486f3fSDylan Yudaken 146f3b44f92SJens Axboe memcpy(cqe, &req->cqe, sizeof(*cqe)); 147e8c328c3SPavel Begunkov 148e8c328c3SPavel Begunkov if (ctx->flags & IORING_SETUP_CQE32) { 149f3b44f92SJens Axboe u64 extra1 = 0, extra2 = 0; 150f3b44f92SJens Axboe 151f3b44f92SJens Axboe if (req->flags & REQ_F_CQE32_INIT) { 152f3b44f92SJens Axboe extra1 = req->extra1; 153f3b44f92SJens Axboe extra2 = req->extra2; 154f3b44f92SJens Axboe } 155f3b44f92SJens Axboe 156f3b44f92SJens Axboe WRITE_ONCE(cqe->big_cqe[0], extra1); 157f3b44f92SJens Axboe WRITE_ONCE(cqe->big_cqe[1], extra2); 158e8c328c3SPavel Begunkov } 159f3b44f92SJens Axboe return true; 160f3b44f92SJens Axboe } 161f3b44f92SJens Axboe 162531113bbSJens Axboe static inline void req_set_fail(struct io_kiocb *req) 163531113bbSJens Axboe { 164531113bbSJens Axboe req->flags |= REQ_F_FAIL; 165531113bbSJens Axboe if (req->flags & REQ_F_CQE_SKIP) { 166531113bbSJens Axboe req->flags &= ~REQ_F_CQE_SKIP; 167531113bbSJens Axboe req->flags |= REQ_F_SKIP_LINK_CQES; 168531113bbSJens Axboe } 169531113bbSJens Axboe } 170531113bbSJens Axboe 171de23077eSJens Axboe static inline void io_req_set_res(struct io_kiocb *req, s32 res, u32 cflags) 172de23077eSJens Axboe { 173de23077eSJens Axboe req->cqe.res = res; 174de23077eSJens Axboe req->cqe.flags = cflags; 175de23077eSJens Axboe } 176de23077eSJens Axboe 17799f15d8dSJens Axboe static inline bool req_has_async_data(struct io_kiocb *req) 17899f15d8dSJens Axboe { 17999f15d8dSJens Axboe return req->flags & REQ_F_ASYNC_DATA; 18099f15d8dSJens Axboe } 18199f15d8dSJens Axboe 182531113bbSJens Axboe static inline void io_put_file(struct file *file) 183531113bbSJens Axboe { 184531113bbSJens Axboe if (file) 185531113bbSJens Axboe fput(file); 186531113bbSJens Axboe } 187531113bbSJens Axboe 188cd40cae2SJens Axboe static inline void io_ring_submit_unlock(struct io_ring_ctx *ctx, 189cd40cae2SJens Axboe unsigned issue_flags) 190cd40cae2SJens Axboe { 191cd40cae2SJens Axboe lockdep_assert_held(&ctx->uring_lock); 192cd40cae2SJens Axboe if (issue_flags & IO_URING_F_UNLOCKED) 193cd40cae2SJens Axboe mutex_unlock(&ctx->uring_lock); 194cd40cae2SJens Axboe } 195cd40cae2SJens Axboe 196cd40cae2SJens Axboe static inline void io_ring_submit_lock(struct io_ring_ctx *ctx, 197cd40cae2SJens Axboe unsigned issue_flags) 198cd40cae2SJens Axboe { 199cd40cae2SJens Axboe /* 200cd40cae2SJens Axboe * "Normal" inline submissions always hold the uring_lock, since we 201cd40cae2SJens Axboe * grab it from the system call. Same is true for the SQPOLL offload. 202cd40cae2SJens Axboe * The only exception is when we've detached the request and issue it 203cd40cae2SJens Axboe * from an async worker thread, grab the lock for that case. 204cd40cae2SJens Axboe */ 205cd40cae2SJens Axboe if (issue_flags & IO_URING_F_UNLOCKED) 206cd40cae2SJens Axboe mutex_lock(&ctx->uring_lock); 207cd40cae2SJens Axboe lockdep_assert_held(&ctx->uring_lock); 208cd40cae2SJens Axboe } 209cd40cae2SJens Axboe 210f9ead18cSJens Axboe static inline void io_commit_cqring(struct io_ring_ctx *ctx) 211f9ead18cSJens Axboe { 212f9ead18cSJens Axboe /* order cqe stores with ring update */ 213f9ead18cSJens Axboe smp_store_release(&ctx->rings->cq.tail, ctx->cached_cq_tail); 214f9ead18cSJens Axboe } 215f9ead18cSJens Axboe 216fc86f9d3SPavel Begunkov /* requires smb_mb() prior, see wq_has_sleeper() */ 217fc86f9d3SPavel Begunkov static inline void __io_cqring_wake(struct io_ring_ctx *ctx) 218f3b44f92SJens Axboe { 219f3b44f92SJens Axboe /* 22044648532SJens Axboe * Trigger waitqueue handler on all waiters on our waitqueue. This 22144648532SJens Axboe * won't necessarily wake up all the tasks, io_should_wake() will make 22244648532SJens Axboe * that decision. 22344648532SJens Axboe * 22444648532SJens Axboe * Pass in EPOLLIN|EPOLL_URING_WAKE as the poll wakeup key. The latter 22544648532SJens Axboe * set in the mask so that if we recurse back into our own poll 22644648532SJens Axboe * waitqueue handlers, we know we have a dependency between eventfd or 22744648532SJens Axboe * epoll and should terminate multishot poll at that point. 228f3b44f92SJens Axboe */ 229fc86f9d3SPavel Begunkov if (waitqueue_active(&ctx->cq_wait)) 23044648532SJens Axboe __wake_up(&ctx->cq_wait, TASK_NORMAL, 0, 23144648532SJens Axboe poll_to_key(EPOLL_URING_WAKE | EPOLLIN)); 232f3b44f92SJens Axboe } 233f3b44f92SJens Axboe 234fc86f9d3SPavel Begunkov static inline void io_cqring_wake(struct io_ring_ctx *ctx) 235fc86f9d3SPavel Begunkov { 236fc86f9d3SPavel Begunkov smp_mb(); 237fc86f9d3SPavel Begunkov __io_cqring_wake(ctx); 238fc86f9d3SPavel Begunkov } 239fc86f9d3SPavel Begunkov 24017437f31SJens Axboe static inline bool io_sqring_full(struct io_ring_ctx *ctx) 24117437f31SJens Axboe { 24217437f31SJens Axboe struct io_rings *r = ctx->rings; 24317437f31SJens Axboe 24417437f31SJens Axboe return READ_ONCE(r->sq.tail) - ctx->cached_sq_head == ctx->sq_entries; 24517437f31SJens Axboe } 24617437f31SJens Axboe 24717437f31SJens Axboe static inline unsigned int io_sqring_entries(struct io_ring_ctx *ctx) 24817437f31SJens Axboe { 24917437f31SJens Axboe struct io_rings *rings = ctx->rings; 25017437f31SJens Axboe 25117437f31SJens Axboe /* make sure SQ entry isn't read before tail */ 25217437f31SJens Axboe return smp_load_acquire(&rings->sq.tail) - ctx->cached_sq_head; 25317437f31SJens Axboe } 25417437f31SJens Axboe 255c0e0d6baSDylan Yudaken static inline int io_run_task_work(void) 25617437f31SJens Axboe { 25746a525e1SJens Axboe if (task_work_pending(current)) { 25846a525e1SJens Axboe if (test_thread_flag(TIF_NOTIFY_SIGNAL)) 25917437f31SJens Axboe clear_notify_signal(); 26046a525e1SJens Axboe __set_current_state(TASK_RUNNING); 26117437f31SJens Axboe task_work_run(); 262c0e0d6baSDylan Yudaken return 1; 26317437f31SJens Axboe } 26417437f31SJens Axboe 265c0e0d6baSDylan Yudaken return 0; 266c0e0d6baSDylan Yudaken } 267c0e0d6baSDylan Yudaken 268dac6a0eaSJens Axboe static inline bool io_task_work_pending(struct io_ring_ctx *ctx) 269dac6a0eaSJens Axboe { 270dac6a0eaSJens Axboe return test_thread_flag(TIF_NOTIFY_SIGNAL) || 271dac6a0eaSJens Axboe !wq_list_empty(&ctx->work_llist); 272dac6a0eaSJens Axboe } 273dac6a0eaSJens Axboe 274c0e0d6baSDylan Yudaken static inline int io_run_task_work_ctx(struct io_ring_ctx *ctx) 275c0e0d6baSDylan Yudaken { 276c0e0d6baSDylan Yudaken int ret = 0; 277c0e0d6baSDylan Yudaken int ret2; 278c0e0d6baSDylan Yudaken 279c0e0d6baSDylan Yudaken if (ctx->flags & IORING_SETUP_DEFER_TASKRUN) 280c0e0d6baSDylan Yudaken ret = io_run_local_work(ctx); 281c0e0d6baSDylan Yudaken 282c0e0d6baSDylan Yudaken /* want to run this after in case more is added */ 283c0e0d6baSDylan Yudaken ret2 = io_run_task_work(); 284c0e0d6baSDylan Yudaken 285c0e0d6baSDylan Yudaken /* Try propagate error in favour of if tasks were run, 286c0e0d6baSDylan Yudaken * but still make sure to run them if requested 287c0e0d6baSDylan Yudaken */ 288c0e0d6baSDylan Yudaken if (ret >= 0) 289c0e0d6baSDylan Yudaken ret += ret2; 290c0e0d6baSDylan Yudaken 291c0e0d6baSDylan Yudaken return ret; 29217437f31SJens Axboe } 29317437f31SJens Axboe 29444f87745SPavel Begunkov static inline int io_run_local_work_locked(struct io_ring_ctx *ctx) 29544f87745SPavel Begunkov { 296b3026767SDylan Yudaken bool locked; 297b3026767SDylan Yudaken int ret; 298b3026767SDylan Yudaken 29944f87745SPavel Begunkov if (llist_empty(&ctx->work_llist)) 30044f87745SPavel Begunkov return 0; 301b3026767SDylan Yudaken 302b3026767SDylan Yudaken locked = true; 303b3026767SDylan Yudaken ret = __io_run_local_work(ctx, &locked); 304b3026767SDylan Yudaken /* shouldn't happen! */ 305b3026767SDylan Yudaken if (WARN_ON_ONCE(!locked)) 306b3026767SDylan Yudaken mutex_lock(&ctx->uring_lock); 307b3026767SDylan Yudaken return ret; 30844f87745SPavel Begunkov } 30944f87745SPavel Begunkov 310aa1e90f6SPavel Begunkov static inline void io_tw_lock(struct io_ring_ctx *ctx, bool *locked) 311aa1e90f6SPavel Begunkov { 312aa1e90f6SPavel Begunkov if (!*locked) { 313aa1e90f6SPavel Begunkov mutex_lock(&ctx->uring_lock); 314aa1e90f6SPavel Begunkov *locked = true; 315aa1e90f6SPavel Begunkov } 316aa1e90f6SPavel Begunkov } 317aa1e90f6SPavel Begunkov 3189da070b1SPavel Begunkov /* 3199da070b1SPavel Begunkov * Don't complete immediately but use deferred completion infrastructure. 3209da070b1SPavel Begunkov * Protected by ->uring_lock and can only be used either with 3219da070b1SPavel Begunkov * IO_URING_F_COMPLETE_DEFER or inside a tw handler holding the mutex. 3229da070b1SPavel Begunkov */ 3239da070b1SPavel Begunkov static inline void io_req_complete_defer(struct io_kiocb *req) 3249da070b1SPavel Begunkov __must_hold(&req->ctx->uring_lock) 325aa1e90f6SPavel Begunkov { 326aa1e90f6SPavel Begunkov struct io_submit_state *state = &req->ctx->submit_state; 327aa1e90f6SPavel Begunkov 3289da070b1SPavel Begunkov lockdep_assert_held(&req->ctx->uring_lock); 3299da070b1SPavel Begunkov 330aa1e90f6SPavel Begunkov wq_list_add_tail(&req->comp_list, &state->compl_reqs); 331aa1e90f6SPavel Begunkov } 332aa1e90f6SPavel Begunkov 33346929b08SPavel Begunkov static inline void io_commit_cqring_flush(struct io_ring_ctx *ctx) 33446929b08SPavel Begunkov { 33546929b08SPavel Begunkov if (unlikely(ctx->off_timeout_used || ctx->drain_active || ctx->has_evfd)) 33646929b08SPavel Begunkov __io_commit_cqring_flush(ctx); 33746929b08SPavel Begunkov } 33846929b08SPavel Begunkov 339e70cb608SPavel Begunkov /* must to be called somewhat shortly after putting a request */ 340e70cb608SPavel Begunkov static inline void io_put_task(struct task_struct *task, int nr) 341e70cb608SPavel Begunkov { 342e70cb608SPavel Begunkov if (likely(task == current)) 343e70cb608SPavel Begunkov task->io_uring->cached_refs += nr; 344e70cb608SPavel Begunkov else 345e70cb608SPavel Begunkov __io_put_task(task, nr); 346e70cb608SPavel Begunkov } 347e70cb608SPavel Begunkov 34863809137SPavel Begunkov static inline void io_get_task_refs(int nr) 34963809137SPavel Begunkov { 35063809137SPavel Begunkov struct io_uring_task *tctx = current->io_uring; 35163809137SPavel Begunkov 35263809137SPavel Begunkov tctx->cached_refs -= nr; 35363809137SPavel Begunkov if (unlikely(tctx->cached_refs < 0)) 35463809137SPavel Begunkov io_task_refs_refill(tctx); 35563809137SPavel Begunkov } 35663809137SPavel Begunkov 357bd1a3783SPavel Begunkov static inline bool io_req_cache_empty(struct io_ring_ctx *ctx) 358bd1a3783SPavel Begunkov { 359bd1a3783SPavel Begunkov return !ctx->submit_state.free_list.next; 360bd1a3783SPavel Begunkov } 361bd1a3783SPavel Begunkov 362bd1a3783SPavel Begunkov static inline bool io_alloc_req_refill(struct io_ring_ctx *ctx) 363bd1a3783SPavel Begunkov { 364bd1a3783SPavel Begunkov if (unlikely(io_req_cache_empty(ctx))) 365bd1a3783SPavel Begunkov return __io_alloc_req_refill(ctx); 366bd1a3783SPavel Begunkov return true; 367bd1a3783SPavel Begunkov } 368bd1a3783SPavel Begunkov 369bd1a3783SPavel Begunkov static inline struct io_kiocb *io_alloc_req(struct io_ring_ctx *ctx) 370bd1a3783SPavel Begunkov { 371bd1a3783SPavel Begunkov struct io_wq_work_node *node; 372bd1a3783SPavel Begunkov 373bd1a3783SPavel Begunkov node = wq_stack_extract(&ctx->submit_state.free_list); 374bd1a3783SPavel Begunkov return container_of(node, struct io_kiocb, comp_list); 375bd1a3783SPavel Begunkov } 376bd1a3783SPavel Begunkov 37776de6749SPavel Begunkov static inline bool io_allowed_run_tw(struct io_ring_ctx *ctx) 37876de6749SPavel Begunkov { 3796567506bSPavel Begunkov return likely(!(ctx->flags & IORING_SETUP_DEFER_TASKRUN) || 3806567506bSPavel Begunkov ctx->submitter_task == current); 38176de6749SPavel Begunkov } 38276de6749SPavel Begunkov 383833b5dffSPavel Begunkov static inline void io_req_queue_tw_complete(struct io_kiocb *req, s32 res) 384833b5dffSPavel Begunkov { 385833b5dffSPavel Begunkov io_req_set_res(req, res, 0); 386833b5dffSPavel Begunkov req->io_task_work.func = io_req_task_complete; 387833b5dffSPavel Begunkov io_req_task_work_add(req); 388833b5dffSPavel Begunkov } 389833b5dffSPavel Begunkov 390de23077eSJens Axboe #endif 391