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> 6b5d3ae20SJens Axboe #include <linux/resume_user_mode.h> 7c1755c25SBreno Leitao #include <linux/kasan.h> 8ab1c84d8SPavel Begunkov #include <linux/io_uring_types.h> 944648532SJens Axboe #include <uapi/linux/eventpoll.h> 10ab1c84d8SPavel Begunkov #include "io-wq.h" 11a6b21fbbSPavel Begunkov #include "slist.h" 12ab1c84d8SPavel Begunkov #include "filetable.h" 13de23077eSJens Axboe 14f3b44f92SJens Axboe #ifndef CREATE_TRACE_POINTS 15f3b44f92SJens Axboe #include <trace/events/io_uring.h> 16f3b44f92SJens Axboe #endif 17f3b44f92SJens Axboe 1897b388d7SJens Axboe enum { 198751d154SPavel Begunkov /* 208751d154SPavel Begunkov * A hint to not wake right away but delay until there are enough of 218751d154SPavel Begunkov * tw's queued to match the number of CQEs the task is waiting for. 228751d154SPavel Begunkov * 238751d154SPavel Begunkov * Must not be used wirh requests generating more than one CQE. 248751d154SPavel Begunkov * It's also ignored unless IORING_SETUP_DEFER_TASKRUN is set. 258751d154SPavel Begunkov */ 2691c7884aSPavel Begunkov IOU_F_TWQ_LAZY_WAKE = 1, 278501fe70SPavel Begunkov }; 288501fe70SPavel Begunkov 298501fe70SPavel Begunkov enum { 3097b388d7SJens Axboe IOU_OK = 0, 3197b388d7SJens Axboe IOU_ISSUE_SKIP_COMPLETE = -EIOCBQUEUED, 32114eccdfSDylan Yudaken 33114eccdfSDylan Yudaken /* 3491482864SPavel Begunkov * Intended only when both IO_URING_F_MULTISHOT is passed 3591482864SPavel Begunkov * to indicate to the poll runner that multishot should be 36114eccdfSDylan Yudaken * removed and the result is set on req->cqe.res. 37114eccdfSDylan Yudaken */ 38114eccdfSDylan Yudaken IOU_STOP_MULTISHOT = -ECANCELED, 3997b388d7SJens Axboe }; 4097b388d7SJens Axboe 41*20d6b633SPavel Begunkov bool io_cqe_cache_refill(struct io_ring_ctx *ctx, bool overflow); 42056695bfSPavel Begunkov void io_req_cqe_overflow(struct io_kiocb *req); 43c0e0d6baSDylan Yudaken int io_run_task_work_sig(struct io_ring_ctx *ctx); 44973fc83fSDylan Yudaken void io_req_defer_failed(struct io_kiocb *req, s32 res); 451bec951cSPavel Begunkov void io_req_complete_post(struct io_kiocb *req, unsigned issue_flags); 46b529c96aSDylan Yudaken bool io_post_aux_cqe(struct io_ring_ctx *ctx, u64 user_data, s32 res, u32 cflags); 47b6b2bb58SPavel Begunkov bool io_fill_cqe_req_aux(struct io_kiocb *req, bool defer, s32 res, u32 cflags); 489046c641SPavel Begunkov void __io_commit_cqring_flush(struct io_ring_ctx *ctx); 499046c641SPavel Begunkov 509046c641SPavel Begunkov struct page **io_pin_pages(unsigned long ubuf, unsigned long len, int *npages); 519046c641SPavel Begunkov 529046c641SPavel Begunkov struct file *io_file_get_normal(struct io_kiocb *req, int fd); 539046c641SPavel Begunkov struct file *io_file_get_fixed(struct io_kiocb *req, int fd, 549046c641SPavel Begunkov unsigned issue_flags); 559046c641SPavel Begunkov 568501fe70SPavel Begunkov void __io_req_task_work_add(struct io_kiocb *req, unsigned flags); 579046c641SPavel Begunkov bool io_is_uring_fops(struct file *file); 589046c641SPavel Begunkov bool io_alloc_async_data(struct io_kiocb *req); 599046c641SPavel Begunkov void io_req_task_queue(struct io_kiocb *req); 60a282967cSPavel Begunkov void io_queue_iowq(struct io_kiocb *req, struct io_tw_state *ts_dont_use); 61a282967cSPavel Begunkov void io_req_task_complete(struct io_kiocb *req, struct io_tw_state *ts); 629046c641SPavel Begunkov void io_req_task_queue_fail(struct io_kiocb *req, int ret); 63a282967cSPavel Begunkov void io_req_task_submit(struct io_kiocb *req, struct io_tw_state *ts); 649046c641SPavel Begunkov void tctx_task_work(struct callback_head *cb); 659046c641SPavel Begunkov __cold void io_uring_cancel_generic(bool cancel_all, struct io_sq_data *sqd); 669046c641SPavel Begunkov int io_uring_alloc_task_context(struct task_struct *task, 679046c641SPavel Begunkov struct io_ring_ctx *ctx); 689046c641SPavel Begunkov 696e76ac59SJosh Triplett int io_ring_add_registered_file(struct io_uring_task *tctx, struct file *file, 706e76ac59SJosh Triplett int start, int end); 716e76ac59SJosh Triplett 72a282967cSPavel Begunkov int io_poll_issue(struct io_kiocb *req, struct io_tw_state *ts); 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); 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 89f26cc959SPavel Begunkov #define io_lockdep_assert_cq_locked(ctx) \ 90f26cc959SPavel Begunkov do { \ 918ce4269eSPavel Begunkov lockdep_assert(in_task()); \ 928ce4269eSPavel Begunkov \ 93f26cc959SPavel Begunkov if (ctx->flags & IORING_SETUP_IOPOLL) { \ 94f26cc959SPavel Begunkov lockdep_assert_held(&ctx->uring_lock); \ 95f26cc959SPavel Begunkov } else if (!ctx->task_complete) { \ 96f26cc959SPavel Begunkov lockdep_assert_held(&ctx->completion_lock); \ 97f26cc959SPavel Begunkov } else if (ctx->submitter_task->flags & PF_EXITING) { \ 98f26cc959SPavel Begunkov lockdep_assert(current_work()); \ 99f26cc959SPavel Begunkov } else { \ 100f26cc959SPavel Begunkov lockdep_assert(current == ctx->submitter_task); \ 101f26cc959SPavel Begunkov } \ 102f26cc959SPavel Begunkov } while (0) 103f26cc959SPavel Begunkov 104e52d2e58SPavel Begunkov static inline void io_req_task_work_add(struct io_kiocb *req) 105e52d2e58SPavel Begunkov { 1068501fe70SPavel Begunkov __io_req_task_work_add(req, 0); 107e52d2e58SPavel Begunkov } 108e52d2e58SPavel Begunkov 1099046c641SPavel Begunkov #define io_for_each_link(pos, head) \ 1109046c641SPavel Begunkov for (pos = (head); pos; pos = pos->link) 111f3b44f92SJens Axboe 112aa1df3a3SPavel Begunkov static inline struct io_uring_cqe *io_get_cqe_overflow(struct io_ring_ctx *ctx, 113aa1df3a3SPavel Begunkov bool overflow) 114f3b44f92SJens Axboe { 115*20d6b633SPavel Begunkov struct io_uring_cqe *cqe; 116*20d6b633SPavel Begunkov 117f26cc959SPavel Begunkov io_lockdep_assert_cq_locked(ctx); 118f26cc959SPavel Begunkov 119*20d6b633SPavel Begunkov if (unlikely(ctx->cqe_cached >= ctx->cqe_sentinel)) { 120*20d6b633SPavel Begunkov if (unlikely(!io_cqe_cache_refill(ctx, overflow))) 121*20d6b633SPavel Begunkov return NULL; 122*20d6b633SPavel Begunkov } 123*20d6b633SPavel Begunkov cqe = ctx->cqe_cached; 124f3b44f92SJens Axboe ctx->cached_cq_tail++; 125f3b44f92SJens Axboe ctx->cqe_cached++; 126b3659a65SPavel Begunkov if (ctx->flags & IORING_SETUP_CQE32) 127b3659a65SPavel Begunkov ctx->cqe_cached++; 128f3b44f92SJens Axboe return cqe; 129f3b44f92SJens Axboe } 130f3b44f92SJens Axboe 131aa1df3a3SPavel Begunkov static inline struct io_uring_cqe *io_get_cqe(struct io_ring_ctx *ctx) 132aa1df3a3SPavel Begunkov { 133aa1df3a3SPavel Begunkov return io_get_cqe_overflow(ctx, false); 134f3b44f92SJens Axboe } 135f3b44f92SJens Axboe 13600b0db56SPavel Begunkov static inline bool io_fill_cqe_req(struct io_ring_ctx *ctx, struct io_kiocb *req) 137f3b44f92SJens Axboe { 138f3b44f92SJens Axboe struct io_uring_cqe *cqe; 139f3b44f92SJens Axboe 140f3b44f92SJens Axboe /* 141f3b44f92SJens Axboe * If we can't get a cq entry, userspace overflowed the 142f3b44f92SJens Axboe * submission (by quite a lot). Increment the overflow count in 143f3b44f92SJens Axboe * the ring. 144f3b44f92SJens Axboe */ 145f3b44f92SJens Axboe cqe = io_get_cqe(ctx); 146e8c328c3SPavel Begunkov if (unlikely(!cqe)) 147f66f7342SPavel Begunkov return false; 148e0486f3fSDylan Yudaken 149a0727c73SPavel Begunkov if (trace_io_uring_complete_enabled()) 150e0486f3fSDylan Yudaken trace_io_uring_complete(req->ctx, req, req->cqe.user_data, 151e0486f3fSDylan Yudaken req->cqe.res, req->cqe.flags, 152b24c5d75SPavel Begunkov req->big_cqe.extra1, req->big_cqe.extra2); 153e0486f3fSDylan Yudaken 154f3b44f92SJens Axboe memcpy(cqe, &req->cqe, sizeof(*cqe)); 155e8c328c3SPavel Begunkov if (ctx->flags & IORING_SETUP_CQE32) { 156b24c5d75SPavel Begunkov memcpy(cqe->big_cqe, &req->big_cqe, sizeof(*cqe)); 157b24c5d75SPavel Begunkov memset(&req->big_cqe, 0, sizeof(req->big_cqe)); 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 18217bc2837SJens Axboe static inline void io_put_file(struct io_kiocb *req) 183531113bbSJens Axboe { 18417bc2837SJens Axboe if (!(req->flags & REQ_F_FIXED_FILE) && req->file) 18517bc2837SJens Axboe fput(req->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 2167b235dd8SPavel Begunkov static inline void io_poll_wq_wake(struct io_ring_ctx *ctx) 2177b235dd8SPavel Begunkov { 218bca39f39SPavel Begunkov if (wq_has_sleeper(&ctx->poll_wq)) 2197b235dd8SPavel Begunkov __wake_up(&ctx->poll_wq, TASK_NORMAL, 0, 2207b235dd8SPavel Begunkov poll_to_key(EPOLL_URING_WAKE | EPOLLIN)); 2217b235dd8SPavel Begunkov } 2227b235dd8SPavel Begunkov 2236e7248adSPavel Begunkov static inline void io_cqring_wake(struct io_ring_ctx *ctx) 224f3b44f92SJens Axboe { 225f3b44f92SJens Axboe /* 22644648532SJens Axboe * Trigger waitqueue handler on all waiters on our waitqueue. This 22744648532SJens Axboe * won't necessarily wake up all the tasks, io_should_wake() will make 22844648532SJens Axboe * that decision. 22944648532SJens Axboe * 23044648532SJens Axboe * Pass in EPOLLIN|EPOLL_URING_WAKE as the poll wakeup key. The latter 23144648532SJens Axboe * set in the mask so that if we recurse back into our own poll 23244648532SJens Axboe * waitqueue handlers, we know we have a dependency between eventfd or 23344648532SJens Axboe * epoll and should terminate multishot poll at that point. 234f3b44f92SJens Axboe */ 2356e7248adSPavel Begunkov if (wq_has_sleeper(&ctx->cq_wait)) 23644648532SJens Axboe __wake_up(&ctx->cq_wait, TASK_NORMAL, 0, 23744648532SJens Axboe poll_to_key(EPOLL_URING_WAKE | EPOLLIN)); 238f3b44f92SJens Axboe } 239f3b44f92SJens Axboe 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; 250e3ef728fSJens Axboe unsigned int entries; 25117437f31SJens Axboe 25217437f31SJens Axboe /* make sure SQ entry isn't read before tail */ 253e3ef728fSJens Axboe entries = smp_load_acquire(&rings->sq.tail) - ctx->cached_sq_head; 254e3ef728fSJens Axboe return min(entries, ctx->sq_entries); 25517437f31SJens Axboe } 25617437f31SJens Axboe 257c0e0d6baSDylan Yudaken static inline int io_run_task_work(void) 25817437f31SJens Axboe { 2597cfe7a09SJens Axboe /* 2607cfe7a09SJens Axboe * Always check-and-clear the task_work notification signal. With how 2617cfe7a09SJens Axboe * signaling works for task_work, we can find it set with nothing to 2627cfe7a09SJens Axboe * run. We need to clear it for that case, like get_signal() does. 2637cfe7a09SJens Axboe */ 26446a525e1SJens Axboe if (test_thread_flag(TIF_NOTIFY_SIGNAL)) 26517437f31SJens Axboe clear_notify_signal(); 266b5d3ae20SJens Axboe /* 267b5d3ae20SJens Axboe * PF_IO_WORKER never returns to userspace, so check here if we have 268b5d3ae20SJens Axboe * notify work that needs processing. 269b5d3ae20SJens Axboe */ 270b5d3ae20SJens Axboe if (current->flags & PF_IO_WORKER && 2712f2bb1ffSJens Axboe test_thread_flag(TIF_NOTIFY_RESUME)) { 2722f2bb1ffSJens Axboe __set_current_state(TASK_RUNNING); 273b5d3ae20SJens Axboe resume_user_mode_work(NULL); 2742f2bb1ffSJens Axboe } 2757cfe7a09SJens Axboe if (task_work_pending(current)) { 27646a525e1SJens Axboe __set_current_state(TASK_RUNNING); 27717437f31SJens Axboe task_work_run(); 278c0e0d6baSDylan Yudaken return 1; 27917437f31SJens Axboe } 28017437f31SJens Axboe 281c0e0d6baSDylan Yudaken return 0; 282c0e0d6baSDylan Yudaken } 283c0e0d6baSDylan Yudaken 284dac6a0eaSJens Axboe static inline bool io_task_work_pending(struct io_ring_ctx *ctx) 285dac6a0eaSJens Axboe { 2866434ec01SJens Axboe return task_work_pending(current) || !wq_list_empty(&ctx->work_llist); 287dac6a0eaSJens Axboe } 288dac6a0eaSJens Axboe 289a282967cSPavel Begunkov static inline void io_tw_lock(struct io_ring_ctx *ctx, struct io_tw_state *ts) 290aa1e90f6SPavel Begunkov { 291a282967cSPavel Begunkov if (!ts->locked) { 292aa1e90f6SPavel Begunkov mutex_lock(&ctx->uring_lock); 293a282967cSPavel Begunkov ts->locked = true; 294aa1e90f6SPavel Begunkov } 295aa1e90f6SPavel Begunkov } 296aa1e90f6SPavel Begunkov 2979da070b1SPavel Begunkov /* 2989da070b1SPavel Begunkov * Don't complete immediately but use deferred completion infrastructure. 2999da070b1SPavel Begunkov * Protected by ->uring_lock and can only be used either with 3009da070b1SPavel Begunkov * IO_URING_F_COMPLETE_DEFER or inside a tw handler holding the mutex. 3019da070b1SPavel Begunkov */ 3029da070b1SPavel Begunkov static inline void io_req_complete_defer(struct io_kiocb *req) 3039da070b1SPavel Begunkov __must_hold(&req->ctx->uring_lock) 304aa1e90f6SPavel Begunkov { 305aa1e90f6SPavel Begunkov struct io_submit_state *state = &req->ctx->submit_state; 306aa1e90f6SPavel Begunkov 3079da070b1SPavel Begunkov lockdep_assert_held(&req->ctx->uring_lock); 3089da070b1SPavel Begunkov 309aa1e90f6SPavel Begunkov wq_list_add_tail(&req->comp_list, &state->compl_reqs); 310aa1e90f6SPavel Begunkov } 311aa1e90f6SPavel Begunkov 31246929b08SPavel Begunkov static inline void io_commit_cqring_flush(struct io_ring_ctx *ctx) 31346929b08SPavel Begunkov { 314bca39f39SPavel Begunkov if (unlikely(ctx->off_timeout_used || ctx->drain_active || 315bca39f39SPavel Begunkov ctx->has_evfd || ctx->poll_activated)) 31646929b08SPavel Begunkov __io_commit_cqring_flush(ctx); 31746929b08SPavel Begunkov } 31846929b08SPavel Begunkov 31963809137SPavel Begunkov static inline void io_get_task_refs(int nr) 32063809137SPavel Begunkov { 32163809137SPavel Begunkov struct io_uring_task *tctx = current->io_uring; 32263809137SPavel Begunkov 32363809137SPavel Begunkov tctx->cached_refs -= nr; 32463809137SPavel Begunkov if (unlikely(tctx->cached_refs < 0)) 32563809137SPavel Begunkov io_task_refs_refill(tctx); 32663809137SPavel Begunkov } 32763809137SPavel Begunkov 328bd1a3783SPavel Begunkov static inline bool io_req_cache_empty(struct io_ring_ctx *ctx) 329bd1a3783SPavel Begunkov { 330bd1a3783SPavel Begunkov return !ctx->submit_state.free_list.next; 331bd1a3783SPavel Begunkov } 332bd1a3783SPavel Begunkov 333c1755c25SBreno Leitao extern struct kmem_cache *req_cachep; 334c1755c25SBreno Leitao 335c8576f3eSPavel Begunkov static inline struct io_kiocb *io_extract_req(struct io_ring_ctx *ctx) 336bd1a3783SPavel Begunkov { 337c1755c25SBreno Leitao struct io_kiocb *req; 338bd1a3783SPavel Begunkov 339c1755c25SBreno Leitao req = container_of(ctx->submit_state.free_list.next, struct io_kiocb, comp_list); 340c1755c25SBreno Leitao wq_stack_extract(&ctx->submit_state.free_list); 341c1755c25SBreno Leitao return req; 342bd1a3783SPavel Begunkov } 343bd1a3783SPavel Begunkov 344c8576f3eSPavel Begunkov static inline bool io_alloc_req(struct io_ring_ctx *ctx, struct io_kiocb **req) 345c8576f3eSPavel Begunkov { 346c8576f3eSPavel Begunkov if (unlikely(io_req_cache_empty(ctx))) { 347c8576f3eSPavel Begunkov if (!__io_alloc_req_refill(ctx)) 348c8576f3eSPavel Begunkov return false; 349c8576f3eSPavel Begunkov } 350c8576f3eSPavel Begunkov *req = io_extract_req(ctx); 351c8576f3eSPavel Begunkov return true; 352c8576f3eSPavel Begunkov } 353c8576f3eSPavel Begunkov 354140102aeSPavel Begunkov static inline bool io_allowed_defer_tw_run(struct io_ring_ctx *ctx) 355140102aeSPavel Begunkov { 356140102aeSPavel Begunkov return likely(ctx->submitter_task == current); 357140102aeSPavel Begunkov } 358140102aeSPavel Begunkov 35976de6749SPavel Begunkov static inline bool io_allowed_run_tw(struct io_ring_ctx *ctx) 36076de6749SPavel Begunkov { 3616567506bSPavel Begunkov return likely(!(ctx->flags & IORING_SETUP_DEFER_TASKRUN) || 3626567506bSPavel Begunkov ctx->submitter_task == current); 36376de6749SPavel Begunkov } 36476de6749SPavel Begunkov 365833b5dffSPavel Begunkov static inline void io_req_queue_tw_complete(struct io_kiocb *req, s32 res) 366833b5dffSPavel Begunkov { 367833b5dffSPavel Begunkov io_req_set_res(req, res, 0); 368833b5dffSPavel Begunkov req->io_task_work.func = io_req_task_complete; 369833b5dffSPavel Begunkov io_req_task_work_add(req); 370833b5dffSPavel Begunkov } 371833b5dffSPavel Begunkov 37296c7d4f8SBreno Leitao /* 37396c7d4f8SBreno Leitao * IORING_SETUP_SQE128 contexts allocate twice the normal SQE size for each 37496c7d4f8SBreno Leitao * slot. 37596c7d4f8SBreno Leitao */ 37696c7d4f8SBreno Leitao static inline size_t uring_sqe_size(struct io_ring_ctx *ctx) 37796c7d4f8SBreno Leitao { 37896c7d4f8SBreno Leitao if (ctx->flags & IORING_SETUP_SQE128) 37996c7d4f8SBreno Leitao return 2 * sizeof(struct io_uring_sqe); 38096c7d4f8SBreno Leitao return sizeof(struct io_uring_sqe); 38196c7d4f8SBreno Leitao } 382de23077eSJens Axboe #endif 383