| #ifndef INTERNAL_IO_WQ_H |
| #define INTERNAL_IO_WQ_H |
| |
| #include <linux/refcount.h> |
| #include <linux/io_uring_types.h> |
| |
| struct io_wq; |
| |
| enum { |
| IO_WQ_WORK_CANCEL = 1, |
| IO_WQ_WORK_HASHED = 2, |
| IO_WQ_WORK_UNBOUND = 4, |
| IO_WQ_WORK_CONCURRENT = 16, |
| |
| IO_WQ_HASH_SHIFT = 24, /* upper 8 bits are used for hash key */ |
| }; |
| |
| enum io_wq_cancel { |
| IO_WQ_CANCEL_OK, /* cancelled before started */ |
| IO_WQ_CANCEL_RUNNING, /* found, running, and attempted cancelled */ |
| IO_WQ_CANCEL_NOTFOUND, /* work not found */ |
| }; |
| |
| typedef struct io_wq_work *(free_work_fn)(struct io_wq_work *); |
| typedef void (io_wq_work_fn)(struct io_wq_work *); |
| |
| struct io_wq_hash { |
| refcount_t refs; |
| unsigned long map; |
| struct wait_queue_head wait; |
| }; |
| |
| static inline void io_wq_put_hash(struct io_wq_hash *hash) |
| { |
| if (refcount_dec_and_test(&hash->refs)) |
| kfree(hash); |
| } |
| |
| struct io_wq_data { |
| struct io_wq_hash *hash; |
| struct task_struct *task; |
| io_wq_work_fn *do_work; |
| free_work_fn *free_work; |
| }; |
| |
| struct io_wq *io_wq_create(unsigned bounded, struct io_wq_data *data); |
| void io_wq_exit_start(struct io_wq *wq); |
| void io_wq_put_and_exit(struct io_wq *wq); |
| |
| void io_wq_enqueue(struct io_wq *wq, struct io_wq_work *work); |
| void io_wq_hash_work(struct io_wq_work *work, void *val); |
| |
| int io_wq_cpu_affinity(struct io_uring_task *tctx, cpumask_var_t mask); |
| int io_wq_max_workers(struct io_wq *wq, int *new_count); |
| bool io_wq_worker_stopped(void); |
| |
| static inline bool io_wq_is_hashed(struct io_wq_work *work) |
| { |
| return work->flags & IO_WQ_WORK_HASHED; |
| } |
| |
| typedef bool (work_cancel_fn)(struct io_wq_work *, void *); |
| |
| enum io_wq_cancel io_wq_cancel_cb(struct io_wq *wq, work_cancel_fn *cancel, |
| void *data, bool cancel_all); |
| |
| #if defined(CONFIG_IO_WQ) |
| extern void io_wq_worker_sleeping(struct task_struct *); |
| extern void io_wq_worker_running(struct task_struct *); |
| #else |
| static inline void io_wq_worker_sleeping(struct task_struct *tsk) |
| { |
| } |
| static inline void io_wq_worker_running(struct task_struct *tsk) |
| { |
| } |
| #endif |
| |
| static inline bool io_wq_current_is_worker(void) |
| { |
| return in_task() && (current->flags & PF_IO_WORKER) && |
| current->worker_private; |
| } |
| #endif |