125 lines
2.9 KiB
C
125 lines
2.9 KiB
C
#ifndef INTERNAL_IO_WQ_H
|
|
#define INTERNAL_IO_WQ_H
|
|
|
|
struct io_wq;
|
|
|
|
enum {
|
|
IO_WQ_WORK_CANCEL = 1,
|
|
IO_WQ_WORK_HAS_MM = 2,
|
|
IO_WQ_WORK_HASHED = 4,
|
|
IO_WQ_WORK_NEEDS_USER = 8,
|
|
IO_WQ_WORK_NEEDS_FILES = 16,
|
|
IO_WQ_WORK_UNBOUND = 32,
|
|
IO_WQ_WORK_INTERNAL = 64,
|
|
IO_WQ_WORK_CB = 128,
|
|
|
|
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;
|
|
};
|
|
|
|
static inline void wq_list_add_tail(struct io_wq_work_node *node,
|
|
struct io_wq_work_list *list)
|
|
{
|
|
if (!list->first) {
|
|
list->first = list->last = node;
|
|
} else {
|
|
list->last->next = node;
|
|
list->last = node;
|
|
}
|
|
}
|
|
|
|
static inline void wq_node_del(struct io_wq_work_list *list,
|
|
struct io_wq_work_node *node,
|
|
struct io_wq_work_node *prev)
|
|
{
|
|
if (node == list->first)
|
|
list->first = node->next;
|
|
if (node == list->last)
|
|
list->last = prev;
|
|
if (prev)
|
|
prev->next = node->next;
|
|
node->next = NULL;
|
|
}
|
|
|
|
#define wq_list_for_each(pos, prv, head) \
|
|
for (pos = (head)->first, prv = NULL; pos; prv = pos, pos = (pos)->next)
|
|
|
|
#define wq_list_empty(list) ((list)->first == NULL)
|
|
#define INIT_WQ_LIST(list) do { \
|
|
(list)->first = NULL; \
|
|
(list)->last = NULL; \
|
|
} while (0)
|
|
|
|
struct io_wq_work {
|
|
union {
|
|
struct io_wq_work_node list;
|
|
void *data;
|
|
};
|
|
void (*func)(struct io_wq_work **);
|
|
struct files_struct *files;
|
|
unsigned flags;
|
|
};
|
|
|
|
#define INIT_IO_WORK(work, _func) \
|
|
do { \
|
|
(work)->list.next = NULL; \
|
|
(work)->func = _func; \
|
|
(work)->flags = 0; \
|
|
(work)->files = NULL; \
|
|
} while (0) \
|
|
|
|
typedef void (get_work_fn)(struct io_wq_work *);
|
|
typedef void (put_work_fn)(struct io_wq_work *);
|
|
|
|
struct io_wq_data {
|
|
struct mm_struct *mm;
|
|
struct user_struct *user;
|
|
const struct cred *creds;
|
|
|
|
get_work_fn *get_work;
|
|
put_work_fn *put_work;
|
|
};
|
|
|
|
struct io_wq *io_wq_create(unsigned bounded, struct io_wq_data *data);
|
|
void io_wq_destroy(struct io_wq *wq);
|
|
|
|
void io_wq_enqueue(struct io_wq *wq, struct io_wq_work *work);
|
|
void io_wq_enqueue_hashed(struct io_wq *wq, struct io_wq_work *work, void *val);
|
|
void io_wq_flush(struct io_wq *wq);
|
|
|
|
void io_wq_cancel_all(struct io_wq *wq);
|
|
enum io_wq_cancel io_wq_cancel_work(struct io_wq *wq, struct io_wq_work *cwork);
|
|
|
|
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);
|
|
|
|
#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 /* CONFIG_IO_WQ */
|
|
|
|
#endif /* INTERNAL_IO_WQ_H */
|