From 9cc63f8bcd560c760d0b12e15bba8f81c86237cf Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Fri, 14 Aug 2026 15:43:51 -0700 Subject: Merge branches 'expcb.2026.07.24a', 'misc.2026.07.30a', 'rcu-tasks.2026.07.30a', 'srcu.2026.08.11a' and 'torture.2026.08.14a' into HEAD Changes: Make expedited grace periods expedite normal RCU callbacks Miscellaneous fixes: * Improve diagnostic output with character task states. * Mark accesses to inform KCSAN of concurrency design. * Move from kmalloc() to kmalloc_obj(). * Documentation updates. * Improve handling of RCU deferred quiescent states. * Clean up unused function arguments and structure fields. * Reduce show_rcu_gp_kthreads() stack space. Tasks RCU updates: * Clean up after SRCU re-implementation of Tasks Trace RCU. * Mark accesses to inform KCSAN of concurrency design. * Add ->lazy_timer status to diagnostic output. * Remove an unnecessary memory barrier. * Fix a data race, courtesy of KCSAN. * Documentation updates. * Convert cond_resched_tasks_rcu_qs() from macro to static inline function. SRCU updates: * Add Rust helpers for SRCU. * Avoid losing queued work at cleanup_srcu_struct() time. Torture-test updates: * Preparation work for immediate RCU priority deboosting. * Test RCU readers from real interrupt handlers (as opposed to softirq). * Simplify code through use of cpumask_next_wrap(). * Improve diagnostic output with character task states. * Add rcutorture.nwriters parameter to allow lightweight stall testing, and rcutorture.stall_only to make doing so easier. * Test an RCU Tasks Trace grace period implying an RCU grace period. * Make RCU Tasks Trace torturing track reader batches. * Fix a data race, courtesy of KCSAN. * Plug a shuffle_tmp_mask memory leak on kthread spawn failure. --- io_uring/cancel.h | 49 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 io_uring/cancel.h (limited to 'io_uring/cancel.h') diff --git a/io_uring/cancel.h b/io_uring/cancel.h new file mode 100644 index 000000000..1b201a094 --- /dev/null +++ b/io_uring/cancel.h @@ -0,0 +1,49 @@ +// SPDX-License-Identifier: GPL-2.0 +#ifndef IORING_CANCEL_H +#define IORING_CANCEL_H + +#include + +struct io_cancel_data { + struct io_ring_ctx *ctx; + u64 data; + struct file *file; + u8 opcode; + u32 flags; + int seq; +}; + +int io_async_cancel_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe); +int io_async_cancel(struct io_kiocb *req, unsigned int issue_flags); + +int io_try_cancel(struct io_uring_task *tctx, struct io_cancel_data *cd, + unsigned int issue_flags); + +int io_sync_cancel(struct io_ring_ctx *ctx, void __user *arg); +bool io_cancel_req_match(struct io_kiocb *req, struct io_cancel_data *cd); +bool io_match_task_safe(struct io_kiocb *head, struct io_uring_task *tctx, + bool cancel_all); + +bool io_cancel_remove_all(struct io_ring_ctx *ctx, struct io_uring_task *tctx, + struct hlist_head *list, bool cancel_all, + bool (*cancel)(struct io_kiocb *)); +int io_cancel_remove(struct io_ring_ctx *ctx, struct io_cancel_data *cd, + unsigned int issue_flags, struct hlist_head *list, + bool (*cancel)(struct io_kiocb *)); +__cold bool io_uring_try_cancel_requests(struct io_ring_ctx *ctx, + struct io_uring_task *tctx, + bool cancel_all, bool is_sqpoll_thread); +__cold void io_uring_cancel_generic(bool cancel_all, struct io_sq_data *sqd); +__cold bool io_cancel_ctx_cb(struct io_wq_work *work, void *data); + +static inline bool io_cancel_match_sequence(struct io_kiocb *req, int sequence) +{ + if (req->cancel_seq_set && sequence == req->work.cancel_seq) + return true; + + req->cancel_seq_set = true; + req->work.cancel_seq = sequence; + return false; +} + +#endif -- cgit v1.3.1