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 41aa1df3a3SPavel Begunkov struct io_uring_cqe *__io_get_cqe(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 { 115f26cc959SPavel Begunkov io_lockdep_assert_cq_locked(ctx); 116f26cc959SPavel Begunkov 117f3b44f92SJens Axboe if (likely(ctx->cqe_cached < ctx->cqe_sentinel)) { 118f3b44f92SJens Axboe struct io_uring_cqe *cqe = ctx->cqe_cached; 119f3b44f92SJens Axboe 120f3b44f92SJens Axboe ctx->cached_cq_tail++; 121f3b44f92SJens Axboe ctx->cqe_cached++; 122b3659a65SPavel Begunkov if (ctx->flags & IORING_SETUP_CQE32) 123b3659a65SPavel Begunkov ctx->cqe_cached++; 124f3b44f92SJens Axboe return cqe; 125f3b44f92SJens Axboe } 126f3b44f92SJens Axboe 127aa1df3a3SPavel Begunkov return __io_get_cqe(ctx, overflow); 128aa1df3a3SPavel Begunkov } 129aa1df3a3SPavel Begunkov 130aa1df3a3SPavel Begunkov static inline struct io_uring_cqe *io_get_cqe(struct io_ring_ctx *ctx) 131aa1df3a3SPavel Begunkov { 132aa1df3a3SPavel Begunkov return io_get_cqe_overflow(ctx, false); 133f3b44f92SJens Axboe } 134f3b44f92SJens Axboe 13500b0db56SPavel Begunkov static inline bool io_fill_cqe_req(struct io_ring_ctx *ctx, struct io_kiocb *req) 136f3b44f92SJens Axboe { 137f3b44f92SJens Axboe struct io_uring_cqe *cqe; 138f3b44f92SJens Axboe 139f3b44f92SJens Axboe /* 140f3b44f92SJens Axboe * If we can't get a cq entry, userspace overflowed the 141f3b44f92SJens Axboe * submission (by quite a lot). Increment the overflow count in 142f3b44f92SJens Axboe * the ring. 143f3b44f92SJens Axboe */ 144f3b44f92SJens Axboe cqe = io_get_cqe(ctx); 145e8c328c3SPavel Begunkov if (unlikely(!cqe)) 146f66f7342SPavel Begunkov return false; 147e0486f3fSDylan Yudaken 148a0727c73SPavel Begunkov if (trace_io_uring_complete_enabled()) 149e0486f3fSDylan Yudaken trace_io_uring_complete(req->ctx, req, req->cqe.user_data, 150e0486f3fSDylan Yudaken req->cqe.res, req->cqe.flags, 151*b24c5d75SPavel Begunkov req->big_cqe.extra1, req->big_cqe.extra2); 152e0486f3fSDylan Yudaken 153f3b44f92SJens Axboe memcpy(cqe, &req->cqe, sizeof(*cqe)); 154e8c328c3SPavel Begunkov if (ctx->flags & IORING_SETUP_CQE32) { 155*b24c5d75SPavel Begunkov memcpy(cqe->big_cqe, &req->big_cqe, sizeof(*cqe)); 156*b24c5d75SPavel Begunkov memset(&req->big_cqe, 0, sizeof(req->big_cqe)); 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 18117bc2837SJens Axboe static inline void io_put_file(struct io_kiocb *req) 182531113bbSJens Axboe { 18317bc2837SJens Axboe if (!(req->flags & REQ_F_FIXED_FILE) && req->file) 18417bc2837SJens Axboe fput(req->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 2157b235dd8SPavel Begunkov static inline void io_poll_wq_wake(struct io_ring_ctx *ctx) 2167b235dd8SPavel Begunkov { 217bca39f39SPavel Begunkov if (wq_has_sleeper(&ctx->poll_wq)) 2187b235dd8SPavel Begunkov __wake_up(&ctx->poll_wq, TASK_NORMAL, 0, 2197b235dd8SPavel Begunkov poll_to_key(EPOLL_URING_WAKE | EPOLLIN)); 2207b235dd8SPavel Begunkov } 2217b235dd8SPavel Begunkov 2226e7248adSPavel Begunkov static inline void io_cqring_wake(struct io_ring_ctx *ctx) 223f3b44f92SJens Axboe { 224f3b44f92SJens Axboe /* 22544648532SJens Axboe * Trigger waitqueue handler on all waiters on our waitqueue. This 22644648532SJens Axboe * won't necessarily wake up all the tasks, io_should_wake() will make 22744648532SJens Axboe * that decision. 22844648532SJens Axboe * 22944648532SJens Axboe * Pass in EPOLLIN|EPOLL_URING_WAKE as the poll wakeup key. The latter 23044648532SJens Axboe * set in the mask so that if we recurse back into our own poll 23144648532SJens Axboe * waitqueue handlers, we know we have a dependency between eventfd or 23244648532SJens Axboe * epoll and should terminate multishot poll at that point. 233f3b44f92SJens Axboe */ 2346e7248adSPavel Begunkov if (wq_has_sleeper(&ctx->cq_wait)) 23544648532SJens Axboe __wake_up(&ctx->cq_wait, TASK_NORMAL, 0, 23644648532SJens Axboe poll_to_key(EPOLL_URING_WAKE | EPOLLIN)); 237f3b44f92SJens Axboe } 238f3b44f92SJens Axboe 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; 249e3ef728fSJens Axboe unsigned int entries; 25017437f31SJens Axboe 25117437f31SJens Axboe /* make sure SQ entry isn't read before tail */ 252e3ef728fSJens Axboe entries = smp_load_acquire(&rings->sq.tail) - ctx->cached_sq_head; 253e3ef728fSJens Axboe return min(entries, ctx->sq_entries); 25417437f31SJens Axboe } 25517437f31SJens Axboe 256c0e0d6baSDylan Yudaken static inline int io_run_task_work(void) 25717437f31SJens Axboe { 2587cfe7a09SJens Axboe /* 2597cfe7a09SJens Axboe * Always check-and-clear the task_work notification signal. With how 2607cfe7a09SJens Axboe * signaling works for task_work, we can find it set with nothing to 2617cfe7a09SJens Axboe * run. We need to clear it for that case, like get_signal() does. 2627cfe7a09SJens Axboe */ 26346a525e1SJens Axboe if (test_thread_flag(TIF_NOTIFY_SIGNAL)) 26417437f31SJens Axboe clear_notify_signal(); 265b5d3ae20SJens Axboe /* 266b5d3ae20SJens Axboe * PF_IO_WORKER never returns to userspace, so check here if we have 267b5d3ae20SJens Axboe * notify work that needs processing. 268b5d3ae20SJens Axboe */ 269b5d3ae20SJens Axboe if (current->flags & PF_IO_WORKER && 2702f2bb1ffSJens Axboe test_thread_flag(TIF_NOTIFY_RESUME)) { 2712f2bb1ffSJens Axboe __set_current_state(TASK_RUNNING); 272b5d3ae20SJens Axboe resume_user_mode_work(NULL); 2732f2bb1ffSJens Axboe } 2747cfe7a09SJens Axboe if (task_work_pending(current)) { 27546a525e1SJens Axboe __set_current_state(TASK_RUNNING); 27617437f31SJens Axboe task_work_run(); 277c0e0d6baSDylan Yudaken return 1; 27817437f31SJens Axboe } 27917437f31SJens Axboe 280c0e0d6baSDylan Yudaken return 0; 281c0e0d6baSDylan Yudaken } 282c0e0d6baSDylan Yudaken 283dac6a0eaSJens Axboe static inline bool io_task_work_pending(struct io_ring_ctx *ctx) 284dac6a0eaSJens Axboe { 2856434ec01SJens Axboe return task_work_pending(current) || !wq_list_empty(&ctx->work_llist); 286dac6a0eaSJens Axboe } 287dac6a0eaSJens Axboe 288a282967cSPavel Begunkov static inline void io_tw_lock(struct io_ring_ctx *ctx, struct io_tw_state *ts) 289aa1e90f6SPavel Begunkov { 290a282967cSPavel Begunkov if (!ts->locked) { 291aa1e90f6SPavel Begunkov mutex_lock(&ctx->uring_lock); 292a282967cSPavel Begunkov ts->locked = true; 293aa1e90f6SPavel Begunkov } 294aa1e90f6SPavel Begunkov } 295aa1e90f6SPavel Begunkov 2969da070b1SPavel Begunkov /* 2979da070b1SPavel Begunkov * Don't complete immediately but use deferred completion infrastructure. 2989da070b1SPavel Begunkov * Protected by ->uring_lock and can only be used either with 2999da070b1SPavel Begunkov * IO_URING_F_COMPLETE_DEFER or inside a tw handler holding the mutex. 3009da070b1SPavel Begunkov */ 3019da070b1SPavel Begunkov static inline void io_req_complete_defer(struct io_kiocb *req) 3029da070b1SPavel Begunkov __must_hold(&req->ctx->uring_lock) 303aa1e90f6SPavel Begunkov { 304aa1e90f6SPavel Begunkov struct io_submit_state *state = &req->ctx->submit_state; 305aa1e90f6SPavel Begunkov 3069da070b1SPavel Begunkov lockdep_assert_held(&req->ctx->uring_lock); 3079da070b1SPavel Begunkov 308aa1e90f6SPavel Begunkov wq_list_add_tail(&req->comp_list, &state->compl_reqs); 309aa1e90f6SPavel Begunkov } 310aa1e90f6SPavel Begunkov 31146929b08SPavel Begunkov static inline void io_commit_cqring_flush(struct io_ring_ctx *ctx) 31246929b08SPavel Begunkov { 313bca39f39SPavel Begunkov if (unlikely(ctx->off_timeout_used || ctx->drain_active || 314bca39f39SPavel Begunkov ctx->has_evfd || ctx->poll_activated)) 31546929b08SPavel Begunkov __io_commit_cqring_flush(ctx); 31646929b08SPavel Begunkov } 31746929b08SPavel Begunkov 31863809137SPavel Begunkov static inline void io_get_task_refs(int nr) 31963809137SPavel Begunkov { 32063809137SPavel Begunkov struct io_uring_task *tctx = current->io_uring; 32163809137SPavel Begunkov 32263809137SPavel Begunkov tctx->cached_refs -= nr; 32363809137SPavel Begunkov if (unlikely(tctx->cached_refs < 0)) 32463809137SPavel Begunkov io_task_refs_refill(tctx); 32563809137SPavel Begunkov } 32663809137SPavel Begunkov 327bd1a3783SPavel Begunkov static inline bool io_req_cache_empty(struct io_ring_ctx *ctx) 328bd1a3783SPavel Begunkov { 329bd1a3783SPavel Begunkov return !ctx->submit_state.free_list.next; 330bd1a3783SPavel Begunkov } 331bd1a3783SPavel Begunkov 332c1755c25SBreno Leitao extern struct kmem_cache *req_cachep; 333c1755c25SBreno Leitao 334c8576f3eSPavel Begunkov static inline struct io_kiocb *io_extract_req(struct io_ring_ctx *ctx) 335bd1a3783SPavel Begunkov { 336c1755c25SBreno Leitao struct io_kiocb *req; 337bd1a3783SPavel Begunkov 338c1755c25SBreno Leitao req = container_of(ctx->submit_state.free_list.next, struct io_kiocb, comp_list); 339c1755c25SBreno Leitao wq_stack_extract(&ctx->submit_state.free_list); 340c1755c25SBreno Leitao return req; 341bd1a3783SPavel Begunkov } 342bd1a3783SPavel Begunkov 343c8576f3eSPavel Begunkov static inline bool io_alloc_req(struct io_ring_ctx *ctx, struct io_kiocb **req) 344c8576f3eSPavel Begunkov { 345c8576f3eSPavel Begunkov if (unlikely(io_req_cache_empty(ctx))) { 346c8576f3eSPavel Begunkov if (!__io_alloc_req_refill(ctx)) 347c8576f3eSPavel Begunkov return false; 348c8576f3eSPavel Begunkov } 349c8576f3eSPavel Begunkov *req = io_extract_req(ctx); 350c8576f3eSPavel Begunkov return true; 351c8576f3eSPavel Begunkov } 352c8576f3eSPavel Begunkov 353140102aeSPavel Begunkov static inline bool io_allowed_defer_tw_run(struct io_ring_ctx *ctx) 354140102aeSPavel Begunkov { 355140102aeSPavel Begunkov return likely(ctx->submitter_task == current); 356140102aeSPavel Begunkov } 357140102aeSPavel Begunkov 35876de6749SPavel Begunkov static inline bool io_allowed_run_tw(struct io_ring_ctx *ctx) 35976de6749SPavel Begunkov { 3606567506bSPavel Begunkov return likely(!(ctx->flags & IORING_SETUP_DEFER_TASKRUN) || 3616567506bSPavel Begunkov ctx->submitter_task == current); 36276de6749SPavel Begunkov } 36376de6749SPavel Begunkov 364833b5dffSPavel Begunkov static inline void io_req_queue_tw_complete(struct io_kiocb *req, s32 res) 365833b5dffSPavel Begunkov { 366833b5dffSPavel Begunkov io_req_set_res(req, res, 0); 367833b5dffSPavel Begunkov req->io_task_work.func = io_req_task_complete; 368833b5dffSPavel Begunkov io_req_task_work_add(req); 369833b5dffSPavel Begunkov } 370833b5dffSPavel Begunkov 37196c7d4f8SBreno Leitao /* 37296c7d4f8SBreno Leitao * IORING_SETUP_SQE128 contexts allocate twice the normal SQE size for each 37396c7d4f8SBreno Leitao * slot. 37496c7d4f8SBreno Leitao */ 37596c7d4f8SBreno Leitao static inline size_t uring_sqe_size(struct io_ring_ctx *ctx) 37696c7d4f8SBreno Leitao { 37796c7d4f8SBreno Leitao if (ctx->flags & IORING_SETUP_SQE128) 37896c7d4f8SBreno Leitao return 2 * sizeof(struct io_uring_sqe); 37996c7d4f8SBreno Leitao return sizeof(struct io_uring_sqe); 38096c7d4f8SBreno Leitao } 381de23077eSJens Axboe #endif 382