+++ /dev/null
-#ifndef INTERNAL_IO_WQ_H
-#define INTERNAL_IO_WQ_H
-
-#include <linux/refcount.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 */
-};
-
-struct io_wq_work_node {
- struct io_wq_work_node *next;
-};
-
-struct io_wq_work_list {
- struct io_wq_work_node *first;
- struct io_wq_work_node *last;
-};
-
-#define wq_list_for_each(pos, prv, head) \
- for (pos = (head)->first, prv = NULL; pos; prv = pos, pos = (pos)->next)
-
-#define wq_list_for_each_resume(pos, prv) \
- for (; pos; prv = pos, pos = (pos)->next)
-
-#define wq_list_empty(list) (READ_ONCE((list)->first) == NULL)
-#define INIT_WQ_LIST(list) do { \
- (list)->first = NULL; \
-} while (0)
-
-static inline void wq_list_add_after(struct io_wq_work_node *node,
- struct io_wq_work_node *pos,
- struct io_wq_work_list *list)
-{
- struct io_wq_work_node *next = pos->next;
-
- pos->next = node;
- node->next = next;
- if (!next)
- list->last = node;
-}
-
-/**
- * wq_list_merge - merge the second list to the first one.
- * @list0: the first list
- * @list1: the second list
- * Return the first node after mergence.
- */
-static inline struct io_wq_work_node *wq_list_merge(struct io_wq_work_list *list0,
- struct io_wq_work_list *list1)
-{
- struct io_wq_work_node *ret;
-
- if (!list0->first) {
- ret = list1->first;
- } else {
- ret = list0->first;
- list0->last->next = list1->first;
- }
- INIT_WQ_LIST(list0);
- INIT_WQ_LIST(list1);
- return ret;
-}
-
-static inline void wq_list_add_tail(struct io_wq_work_node *node,
- struct io_wq_work_list *list)
-{
- node->next = NULL;
- if (!list->first) {
- list->last = node;
- WRITE_ONCE(list->first, node);
- } else {
- list->last->next = node;
- list->last = node;
- }
-}
-
-static inline void wq_list_add_head(struct io_wq_work_node *node,
- struct io_wq_work_list *list)
-{
- node->next = list->first;
- if (!node->next)
- list->last = node;
- WRITE_ONCE(list->first, node);
-}
-
-static inline void wq_list_cut(struct io_wq_work_list *list,
- struct io_wq_work_node *last,
- struct io_wq_work_node *prev)
-{
- /* first in the list, if prev==NULL */
- if (!prev)
- WRITE_ONCE(list->first, last->next);
- else
- prev->next = last->next;
-
- if (last == list->last)
- list->last = prev;
- last->next = NULL;
-}
-
-static inline void __wq_list_splice(struct io_wq_work_list *list,
- struct io_wq_work_node *to)
-{
- list->last->next = to->next;
- to->next = list->first;
- INIT_WQ_LIST(list);
-}
-
-static inline bool wq_list_splice(struct io_wq_work_list *list,
- struct io_wq_work_node *to)
-{
- if (!wq_list_empty(list)) {
- __wq_list_splice(list, to);
- return true;
- }
- return false;
-}
-
-static inline void wq_stack_add_head(struct io_wq_work_node *node,
- struct io_wq_work_node *stack)
-{
- node->next = stack->next;
- stack->next = node;
-}
-
-static inline void wq_list_del(struct io_wq_work_list *list,
- struct io_wq_work_node *node,
- struct io_wq_work_node *prev)
-{
- wq_list_cut(list, node, prev);
-}
-
-static inline
-struct io_wq_work_node *wq_stack_extract(struct io_wq_work_node *stack)
-{
- struct io_wq_work_node *node = stack->next;
-
- stack->next = node->next;
- return node;
-}
-
-struct io_wq_work {
- struct io_wq_work_node list;
- unsigned flags;
- int cancel_seq;
-};
-
-static inline struct io_wq_work *wq_next_work(struct io_wq_work *work)
-{
- if (!work->list.next)
- return NULL;
-
- return container_of(work->list.next, struct io_wq_work, list);
-}
-
-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_wq *wq, cpumask_var_t mask);
-int io_wq_max_workers(struct io_wq *wq, int *new_count);
-
-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
projects / people / ms / linux.git / blobdiff