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> 7*44648532SJens 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); 339046c641SPavel Begunkov void io_req_complete_failed(struct io_kiocb *req, s32 res); 349046c641SPavel Begunkov void __io_req_complete(struct io_kiocb *req, unsigned issue_flags); 359046c641SPavel Begunkov void io_req_complete_post(struct io_kiocb *req); 3652120f0fSDylan Yudaken bool io_post_aux_cqe(struct io_ring_ctx *ctx, u64 user_data, s32 res, u32 cflags, 3752120f0fSDylan Yudaken bool allow_overflow); 38eb42cebbSPavel Begunkov bool io_fill_cqe_aux(struct io_ring_ctx *ctx, u64 user_data, s32 res, u32 cflags, 39eb42cebbSPavel Begunkov bool allow_overflow); 409046c641SPavel Begunkov void __io_commit_cqring_flush(struct io_ring_ctx *ctx); 419046c641SPavel Begunkov 429046c641SPavel Begunkov struct page **io_pin_pages(unsigned long ubuf, unsigned long len, int *npages); 439046c641SPavel Begunkov 449046c641SPavel Begunkov struct file *io_file_get_normal(struct io_kiocb *req, int fd); 459046c641SPavel Begunkov struct file *io_file_get_fixed(struct io_kiocb *req, int fd, 469046c641SPavel Begunkov unsigned issue_flags); 479046c641SPavel Begunkov 48f6b543fdSJens Axboe static inline bool io_req_ffs_set(struct io_kiocb *req) 49f6b543fdSJens Axboe { 50f6b543fdSJens Axboe return req->flags & REQ_F_FIXED_FILE; 51f6b543fdSJens Axboe } 52f6b543fdSJens Axboe 53e52d2e58SPavel Begunkov void __io_req_task_work_add(struct io_kiocb *req, bool allow_local); 549046c641SPavel Begunkov bool io_is_uring_fops(struct file *file); 559046c641SPavel Begunkov bool io_alloc_async_data(struct io_kiocb *req); 569046c641SPavel Begunkov void io_req_tw_post_queue(struct io_kiocb *req, s32 res, u32 cflags); 579046c641SPavel Begunkov void io_req_task_queue(struct io_kiocb *req); 589046c641SPavel Begunkov void io_queue_iowq(struct io_kiocb *req, bool *dont_use); 599046c641SPavel Begunkov void io_req_task_complete(struct io_kiocb *req, bool *locked); 609046c641SPavel Begunkov void io_req_task_queue_fail(struct io_kiocb *req, int ret); 619046c641SPavel Begunkov void io_req_task_submit(struct io_kiocb *req, bool *locked); 629046c641SPavel Begunkov void tctx_task_work(struct callback_head *cb); 639046c641SPavel Begunkov __cold void io_uring_cancel_generic(bool cancel_all, struct io_sq_data *sqd); 649046c641SPavel Begunkov int io_uring_alloc_task_context(struct task_struct *task, 659046c641SPavel Begunkov struct io_ring_ctx *ctx); 669046c641SPavel Begunkov 679046c641SPavel Begunkov int io_poll_issue(struct io_kiocb *req, bool *locked); 689046c641SPavel Begunkov int io_submit_sqes(struct io_ring_ctx *ctx, unsigned int nr); 699046c641SPavel Begunkov int io_do_iopoll(struct io_ring_ctx *ctx, bool force_nonspin); 709046c641SPavel Begunkov void io_free_batch_list(struct io_ring_ctx *ctx, struct io_wq_work_node *node); 719046c641SPavel Begunkov int io_req_prep_async(struct io_kiocb *req); 729046c641SPavel Begunkov 739046c641SPavel Begunkov struct io_wq_work *io_wq_free_work(struct io_wq_work *work); 749046c641SPavel Begunkov void io_wq_submit_work(struct io_wq_work *work); 759046c641SPavel Begunkov 769046c641SPavel Begunkov void io_free_req(struct io_kiocb *req); 779046c641SPavel Begunkov void io_queue_next(struct io_kiocb *req); 78e70cb608SPavel Begunkov void __io_put_task(struct task_struct *task, int nr); 7963809137SPavel Begunkov void io_task_refs_refill(struct io_uring_task *tctx); 80bd1a3783SPavel Begunkov bool __io_alloc_req_refill(struct io_ring_ctx *ctx); 819046c641SPavel Begunkov 829046c641SPavel Begunkov bool io_match_task_safe(struct io_kiocb *head, struct task_struct *task, 839046c641SPavel Begunkov bool cancel_all); 849046c641SPavel Begunkov 85e52d2e58SPavel Begunkov static inline void io_req_task_work_add(struct io_kiocb *req) 86e52d2e58SPavel Begunkov { 87e52d2e58SPavel Begunkov __io_req_task_work_add(req, true); 88e52d2e58SPavel Begunkov } 89e52d2e58SPavel Begunkov 909046c641SPavel Begunkov #define io_for_each_link(pos, head) \ 919046c641SPavel Begunkov for (pos = (head); pos; pos = pos->link) 92f3b44f92SJens Axboe 9325399321SPavel Begunkov static inline void io_cq_lock(struct io_ring_ctx *ctx) 9425399321SPavel Begunkov __acquires(ctx->completion_lock) 9525399321SPavel Begunkov { 9625399321SPavel Begunkov spin_lock(&ctx->completion_lock); 9725399321SPavel Begunkov } 9825399321SPavel Begunkov 9925399321SPavel Begunkov void io_cq_unlock_post(struct io_ring_ctx *ctx); 10025399321SPavel Begunkov 101aa1df3a3SPavel Begunkov static inline struct io_uring_cqe *io_get_cqe_overflow(struct io_ring_ctx *ctx, 102aa1df3a3SPavel Begunkov bool overflow) 103f3b44f92SJens Axboe { 104f3b44f92SJens Axboe if (likely(ctx->cqe_cached < ctx->cqe_sentinel)) { 105f3b44f92SJens Axboe struct io_uring_cqe *cqe = ctx->cqe_cached; 106f3b44f92SJens Axboe 107f3b44f92SJens Axboe ctx->cached_cq_tail++; 108f3b44f92SJens Axboe ctx->cqe_cached++; 109b3659a65SPavel Begunkov if (ctx->flags & IORING_SETUP_CQE32) 110b3659a65SPavel Begunkov ctx->cqe_cached++; 111f3b44f92SJens Axboe return cqe; 112f3b44f92SJens Axboe } 113f3b44f92SJens Axboe 114aa1df3a3SPavel Begunkov return __io_get_cqe(ctx, overflow); 115aa1df3a3SPavel Begunkov } 116aa1df3a3SPavel Begunkov 117aa1df3a3SPavel Begunkov static inline struct io_uring_cqe *io_get_cqe(struct io_ring_ctx *ctx) 118aa1df3a3SPavel Begunkov { 119aa1df3a3SPavel Begunkov return io_get_cqe_overflow(ctx, false); 120f3b44f92SJens Axboe } 121f3b44f92SJens Axboe 122f3b44f92SJens Axboe static inline bool __io_fill_cqe_req(struct io_ring_ctx *ctx, 123f3b44f92SJens Axboe struct io_kiocb *req) 124f3b44f92SJens Axboe { 125f3b44f92SJens Axboe struct io_uring_cqe *cqe; 126f3b44f92SJens Axboe 127f3b44f92SJens Axboe /* 128f3b44f92SJens Axboe * If we can't get a cq entry, userspace overflowed the 129f3b44f92SJens Axboe * submission (by quite a lot). Increment the overflow count in 130f3b44f92SJens Axboe * the ring. 131f3b44f92SJens Axboe */ 132f3b44f92SJens Axboe cqe = io_get_cqe(ctx); 133e8c328c3SPavel Begunkov if (unlikely(!cqe)) 134e8c328c3SPavel Begunkov return io_req_cqe_overflow(req); 135e0486f3fSDylan Yudaken 136e0486f3fSDylan Yudaken trace_io_uring_complete(req->ctx, req, req->cqe.user_data, 137e0486f3fSDylan Yudaken req->cqe.res, req->cqe.flags, 138e0486f3fSDylan Yudaken (req->flags & REQ_F_CQE32_INIT) ? req->extra1 : 0, 139e0486f3fSDylan Yudaken (req->flags & REQ_F_CQE32_INIT) ? req->extra2 : 0); 140e0486f3fSDylan Yudaken 141f3b44f92SJens Axboe memcpy(cqe, &req->cqe, sizeof(*cqe)); 142e8c328c3SPavel Begunkov 143e8c328c3SPavel Begunkov if (ctx->flags & IORING_SETUP_CQE32) { 144f3b44f92SJens Axboe u64 extra1 = 0, extra2 = 0; 145f3b44f92SJens Axboe 146f3b44f92SJens Axboe if (req->flags & REQ_F_CQE32_INIT) { 147f3b44f92SJens Axboe extra1 = req->extra1; 148f3b44f92SJens Axboe extra2 = req->extra2; 149f3b44f92SJens Axboe } 150f3b44f92SJens Axboe 151f3b44f92SJens Axboe WRITE_ONCE(cqe->big_cqe[0], extra1); 152f3b44f92SJens Axboe WRITE_ONCE(cqe->big_cqe[1], extra2); 153e8c328c3SPavel Begunkov } 154f3b44f92SJens Axboe return true; 155f3b44f92SJens Axboe } 156f3b44f92SJens Axboe 157531113bbSJens Axboe static inline void req_set_fail(struct io_kiocb *req) 158531113bbSJens Axboe { 159531113bbSJens Axboe req->flags |= REQ_F_FAIL; 160531113bbSJens Axboe if (req->flags & REQ_F_CQE_SKIP) { 161531113bbSJens Axboe req->flags &= ~REQ_F_CQE_SKIP; 162531113bbSJens Axboe req->flags |= REQ_F_SKIP_LINK_CQES; 163531113bbSJens Axboe } 164531113bbSJens Axboe } 165531113bbSJens Axboe 166de23077eSJens Axboe static inline void io_req_set_res(struct io_kiocb *req, s32 res, u32 cflags) 167de23077eSJens Axboe { 168de23077eSJens Axboe req->cqe.res = res; 169de23077eSJens Axboe req->cqe.flags = cflags; 170de23077eSJens Axboe } 171de23077eSJens Axboe 17299f15d8dSJens Axboe static inline bool req_has_async_data(struct io_kiocb *req) 17399f15d8dSJens Axboe { 17499f15d8dSJens Axboe return req->flags & REQ_F_ASYNC_DATA; 17599f15d8dSJens Axboe } 17699f15d8dSJens Axboe 177531113bbSJens Axboe static inline void io_put_file(struct file *file) 178531113bbSJens Axboe { 179531113bbSJens Axboe if (file) 180531113bbSJens Axboe fput(file); 181531113bbSJens Axboe } 182531113bbSJens Axboe 183cd40cae2SJens Axboe static inline void io_ring_submit_unlock(struct io_ring_ctx *ctx, 184cd40cae2SJens Axboe unsigned issue_flags) 185cd40cae2SJens Axboe { 186cd40cae2SJens Axboe lockdep_assert_held(&ctx->uring_lock); 187cd40cae2SJens Axboe if (issue_flags & IO_URING_F_UNLOCKED) 188cd40cae2SJens Axboe mutex_unlock(&ctx->uring_lock); 189cd40cae2SJens Axboe } 190cd40cae2SJens Axboe 191cd40cae2SJens Axboe static inline void io_ring_submit_lock(struct io_ring_ctx *ctx, 192cd40cae2SJens Axboe unsigned issue_flags) 193cd40cae2SJens Axboe { 194cd40cae2SJens Axboe /* 195cd40cae2SJens Axboe * "Normal" inline submissions always hold the uring_lock, since we 196cd40cae2SJens Axboe * grab it from the system call. Same is true for the SQPOLL offload. 197cd40cae2SJens Axboe * The only exception is when we've detached the request and issue it 198cd40cae2SJens Axboe * from an async worker thread, grab the lock for that case. 199cd40cae2SJens Axboe */ 200cd40cae2SJens Axboe if (issue_flags & IO_URING_F_UNLOCKED) 201cd40cae2SJens Axboe mutex_lock(&ctx->uring_lock); 202cd40cae2SJens Axboe lockdep_assert_held(&ctx->uring_lock); 203cd40cae2SJens Axboe } 204cd40cae2SJens Axboe 205f9ead18cSJens Axboe static inline void io_commit_cqring(struct io_ring_ctx *ctx) 206f9ead18cSJens Axboe { 207f9ead18cSJens Axboe /* order cqe stores with ring update */ 208f9ead18cSJens Axboe smp_store_release(&ctx->rings->cq.tail, ctx->cached_cq_tail); 209f9ead18cSJens Axboe } 210f9ead18cSJens Axboe 211fc86f9d3SPavel Begunkov /* requires smb_mb() prior, see wq_has_sleeper() */ 212fc86f9d3SPavel Begunkov static inline void __io_cqring_wake(struct io_ring_ctx *ctx) 213f3b44f92SJens Axboe { 214f3b44f92SJens Axboe /* 215*44648532SJens Axboe * Trigger waitqueue handler on all waiters on our waitqueue. This 216*44648532SJens Axboe * won't necessarily wake up all the tasks, io_should_wake() will make 217*44648532SJens Axboe * that decision. 218*44648532SJens Axboe * 219*44648532SJens Axboe * Pass in EPOLLIN|EPOLL_URING_WAKE as the poll wakeup key. The latter 220*44648532SJens Axboe * set in the mask so that if we recurse back into our own poll 221*44648532SJens Axboe * waitqueue handlers, we know we have a dependency between eventfd or 222*44648532SJens Axboe * epoll and should terminate multishot poll at that point. 223f3b44f92SJens Axboe */ 224fc86f9d3SPavel Begunkov if (waitqueue_active(&ctx->cq_wait)) 225*44648532SJens Axboe __wake_up(&ctx->cq_wait, TASK_NORMAL, 0, 226*44648532SJens Axboe poll_to_key(EPOLL_URING_WAKE | EPOLLIN)); 227f3b44f92SJens Axboe } 228f3b44f92SJens Axboe 229fc86f9d3SPavel Begunkov static inline void io_cqring_wake(struct io_ring_ctx *ctx) 230fc86f9d3SPavel Begunkov { 231fc86f9d3SPavel Begunkov smp_mb(); 232fc86f9d3SPavel Begunkov __io_cqring_wake(ctx); 233fc86f9d3SPavel Begunkov } 234fc86f9d3SPavel Begunkov 23517437f31SJens Axboe static inline bool io_sqring_full(struct io_ring_ctx *ctx) 23617437f31SJens Axboe { 23717437f31SJens Axboe struct io_rings *r = ctx->rings; 23817437f31SJens Axboe 23917437f31SJens Axboe return READ_ONCE(r->sq.tail) - ctx->cached_sq_head == ctx->sq_entries; 24017437f31SJens Axboe } 24117437f31SJens Axboe 24217437f31SJens Axboe static inline unsigned int io_sqring_entries(struct io_ring_ctx *ctx) 24317437f31SJens Axboe { 24417437f31SJens Axboe struct io_rings *rings = ctx->rings; 24517437f31SJens Axboe 24617437f31SJens Axboe /* make sure SQ entry isn't read before tail */ 24717437f31SJens Axboe return smp_load_acquire(&rings->sq.tail) - ctx->cached_sq_head; 24817437f31SJens Axboe } 24917437f31SJens Axboe 250c0e0d6baSDylan Yudaken static inline int io_run_task_work(void) 25117437f31SJens Axboe { 25246a525e1SJens Axboe if (task_work_pending(current)) { 25346a525e1SJens Axboe if (test_thread_flag(TIF_NOTIFY_SIGNAL)) 25417437f31SJens Axboe clear_notify_signal(); 25546a525e1SJens Axboe __set_current_state(TASK_RUNNING); 25617437f31SJens Axboe task_work_run(); 257c0e0d6baSDylan Yudaken return 1; 25817437f31SJens Axboe } 25917437f31SJens Axboe 260c0e0d6baSDylan Yudaken return 0; 261c0e0d6baSDylan Yudaken } 262c0e0d6baSDylan Yudaken 263dac6a0eaSJens Axboe static inline bool io_task_work_pending(struct io_ring_ctx *ctx) 264dac6a0eaSJens Axboe { 265dac6a0eaSJens Axboe return test_thread_flag(TIF_NOTIFY_SIGNAL) || 266dac6a0eaSJens Axboe !wq_list_empty(&ctx->work_llist); 267dac6a0eaSJens Axboe } 268dac6a0eaSJens Axboe 269c0e0d6baSDylan Yudaken static inline int io_run_task_work_ctx(struct io_ring_ctx *ctx) 270c0e0d6baSDylan Yudaken { 271c0e0d6baSDylan Yudaken int ret = 0; 272c0e0d6baSDylan Yudaken int ret2; 273c0e0d6baSDylan Yudaken 274c0e0d6baSDylan Yudaken if (ctx->flags & IORING_SETUP_DEFER_TASKRUN) 275c0e0d6baSDylan Yudaken ret = io_run_local_work(ctx); 276c0e0d6baSDylan Yudaken 277c0e0d6baSDylan Yudaken /* want to run this after in case more is added */ 278c0e0d6baSDylan Yudaken ret2 = io_run_task_work(); 279c0e0d6baSDylan Yudaken 280c0e0d6baSDylan Yudaken /* Try propagate error in favour of if tasks were run, 281c0e0d6baSDylan Yudaken * but still make sure to run them if requested 282c0e0d6baSDylan Yudaken */ 283c0e0d6baSDylan Yudaken if (ret >= 0) 284c0e0d6baSDylan Yudaken ret += ret2; 285c0e0d6baSDylan Yudaken 286c0e0d6baSDylan Yudaken return ret; 28717437f31SJens Axboe } 28817437f31SJens Axboe 28944f87745SPavel Begunkov static inline int io_run_local_work_locked(struct io_ring_ctx *ctx) 29044f87745SPavel Begunkov { 291b3026767SDylan Yudaken bool locked; 292b3026767SDylan Yudaken int ret; 293b3026767SDylan Yudaken 29444f87745SPavel Begunkov if (llist_empty(&ctx->work_llist)) 29544f87745SPavel Begunkov return 0; 296b3026767SDylan Yudaken 297b3026767SDylan Yudaken locked = true; 298b3026767SDylan Yudaken ret = __io_run_local_work(ctx, &locked); 299b3026767SDylan Yudaken /* shouldn't happen! */ 300b3026767SDylan Yudaken if (WARN_ON_ONCE(!locked)) 301b3026767SDylan Yudaken mutex_lock(&ctx->uring_lock); 302b3026767SDylan Yudaken return ret; 30344f87745SPavel Begunkov } 30444f87745SPavel Begunkov 305aa1e90f6SPavel Begunkov static inline void io_tw_lock(struct io_ring_ctx *ctx, bool *locked) 306aa1e90f6SPavel Begunkov { 307aa1e90f6SPavel Begunkov if (!*locked) { 308aa1e90f6SPavel Begunkov mutex_lock(&ctx->uring_lock); 309aa1e90f6SPavel Begunkov *locked = true; 310aa1e90f6SPavel Begunkov } 311aa1e90f6SPavel Begunkov } 312aa1e90f6SPavel Begunkov 3139da070b1SPavel Begunkov /* 3149da070b1SPavel Begunkov * Don't complete immediately but use deferred completion infrastructure. 3159da070b1SPavel Begunkov * Protected by ->uring_lock and can only be used either with 3169da070b1SPavel Begunkov * IO_URING_F_COMPLETE_DEFER or inside a tw handler holding the mutex. 3179da070b1SPavel Begunkov */ 3189da070b1SPavel Begunkov static inline void io_req_complete_defer(struct io_kiocb *req) 3199da070b1SPavel Begunkov __must_hold(&req->ctx->uring_lock) 320aa1e90f6SPavel Begunkov { 321aa1e90f6SPavel Begunkov struct io_submit_state *state = &req->ctx->submit_state; 322aa1e90f6SPavel Begunkov 3239da070b1SPavel Begunkov lockdep_assert_held(&req->ctx->uring_lock); 3249da070b1SPavel Begunkov 325aa1e90f6SPavel Begunkov wq_list_add_tail(&req->comp_list, &state->compl_reqs); 326aa1e90f6SPavel Begunkov } 327aa1e90f6SPavel Begunkov 32846929b08SPavel Begunkov static inline void io_commit_cqring_flush(struct io_ring_ctx *ctx) 32946929b08SPavel Begunkov { 33046929b08SPavel Begunkov if (unlikely(ctx->off_timeout_used || ctx->drain_active || ctx->has_evfd)) 33146929b08SPavel Begunkov __io_commit_cqring_flush(ctx); 33246929b08SPavel Begunkov } 33346929b08SPavel Begunkov 334e70cb608SPavel Begunkov /* must to be called somewhat shortly after putting a request */ 335e70cb608SPavel Begunkov static inline void io_put_task(struct task_struct *task, int nr) 336e70cb608SPavel Begunkov { 337e70cb608SPavel Begunkov if (likely(task == current)) 338e70cb608SPavel Begunkov task->io_uring->cached_refs += nr; 339e70cb608SPavel Begunkov else 340e70cb608SPavel Begunkov __io_put_task(task, nr); 341e70cb608SPavel Begunkov } 342e70cb608SPavel Begunkov 34363809137SPavel Begunkov static inline void io_get_task_refs(int nr) 34463809137SPavel Begunkov { 34563809137SPavel Begunkov struct io_uring_task *tctx = current->io_uring; 34663809137SPavel Begunkov 34763809137SPavel Begunkov tctx->cached_refs -= nr; 34863809137SPavel Begunkov if (unlikely(tctx->cached_refs < 0)) 34963809137SPavel Begunkov io_task_refs_refill(tctx); 35063809137SPavel Begunkov } 35163809137SPavel Begunkov 352bd1a3783SPavel Begunkov static inline bool io_req_cache_empty(struct io_ring_ctx *ctx) 353bd1a3783SPavel Begunkov { 354bd1a3783SPavel Begunkov return !ctx->submit_state.free_list.next; 355bd1a3783SPavel Begunkov } 356bd1a3783SPavel Begunkov 357bd1a3783SPavel Begunkov static inline bool io_alloc_req_refill(struct io_ring_ctx *ctx) 358bd1a3783SPavel Begunkov { 359bd1a3783SPavel Begunkov if (unlikely(io_req_cache_empty(ctx))) 360bd1a3783SPavel Begunkov return __io_alloc_req_refill(ctx); 361bd1a3783SPavel Begunkov return true; 362bd1a3783SPavel Begunkov } 363bd1a3783SPavel Begunkov 364bd1a3783SPavel Begunkov static inline struct io_kiocb *io_alloc_req(struct io_ring_ctx *ctx) 365bd1a3783SPavel Begunkov { 366bd1a3783SPavel Begunkov struct io_wq_work_node *node; 367bd1a3783SPavel Begunkov 368bd1a3783SPavel Begunkov node = wq_stack_extract(&ctx->submit_state.free_list); 369bd1a3783SPavel Begunkov return container_of(node, struct io_kiocb, comp_list); 370bd1a3783SPavel Begunkov } 371bd1a3783SPavel Begunkov 37276de6749SPavel Begunkov static inline bool io_allowed_run_tw(struct io_ring_ctx *ctx) 37376de6749SPavel Begunkov { 3746567506bSPavel Begunkov return likely(!(ctx->flags & IORING_SETUP_DEFER_TASKRUN) || 3756567506bSPavel Begunkov ctx->submitter_task == current); 37676de6749SPavel Begunkov } 37776de6749SPavel Begunkov 378de23077eSJens Axboe #endif 379