Tejun Heo | ea13844 | 2013-01-18 14:05:55 -0800 | [diff] [blame] | 1 | /* |
| 2 | * kernel/workqueue_internal.h |
| 3 | * |
| 4 | * Workqueue internal header file. Only to be included by workqueue and |
| 5 | * core kernel subsystems. |
| 6 | */ |
| 7 | #ifndef _KERNEL_WORKQUEUE_INTERNAL_H |
| 8 | #define _KERNEL_WORKQUEUE_INTERNAL_H |
| 9 | |
Tejun Heo | 2eaebdb3 | 2013-01-18 14:05:55 -0800 | [diff] [blame] | 10 | #include <linux/workqueue.h> |
Tejun Heo | 84b233a | 2013-01-18 14:05:56 -0800 | [diff] [blame] | 11 | #include <linux/kthread.h> |
Tejun Heo | 2eaebdb3 | 2013-01-18 14:05:55 -0800 | [diff] [blame] | 12 | |
Tejun Heo | 2eaebdb3 | 2013-01-18 14:05:55 -0800 | [diff] [blame] | 13 | struct worker_pool; |
| 14 | |
| 15 | /* |
| 16 | * The poor guys doing the actual heavy lifting. All on-duty workers are |
| 17 | * either serving the manager role, on idle list or on busy hash. For |
| 18 | * details on the locking annotation (L, I, X...), refer to workqueue.c. |
| 19 | * |
| 20 | * Only to be used in workqueue and async. |
| 21 | */ |
| 22 | struct worker { |
| 23 | /* on idle list while idle, on busy hash table while busy */ |
| 24 | union { |
| 25 | struct list_head entry; /* L: while idle */ |
| 26 | struct hlist_node hentry; /* L: while busy */ |
| 27 | }; |
| 28 | |
| 29 | struct work_struct *current_work; /* L: work being processed */ |
| 30 | work_func_t current_func; /* L: current_work's fn */ |
Tejun Heo | 112202d | 2013-02-13 19:29:12 -0800 | [diff] [blame] | 31 | struct pool_workqueue *current_pwq; /* L: current_work's pwq */ |
Tejun Heo | 3d1cb20 | 2013-04-30 15:27:22 -0700 | [diff] [blame] | 32 | bool desc_valid; /* ->desc is valid */ |
Tejun Heo | 2eaebdb3 | 2013-01-18 14:05:55 -0800 | [diff] [blame] | 33 | struct list_head scheduled; /* L: scheduled works */ |
Tejun Heo | 3d1cb20 | 2013-04-30 15:27:22 -0700 | [diff] [blame] | 34 | |
| 35 | /* 64 bytes boundary on 64bit, 32 on 32bit */ |
| 36 | |
Tejun Heo | 2eaebdb3 | 2013-01-18 14:05:55 -0800 | [diff] [blame] | 37 | struct task_struct *task; /* I: worker task */ |
| 38 | struct worker_pool *pool; /* I: the associated pool */ |
Lai Jiangshan | b310410 | 2013-02-19 12:17:02 -0800 | [diff] [blame] | 39 | /* L: for rescuers */ |
Lai Jiangshan | 92f9c5c | 2014-05-20 17:46:34 +0800 | [diff] [blame] | 40 | struct list_head node; /* A: anchored at pool->workers */ |
| 41 | /* A: runs through worker->node */ |
Tejun Heo | 3d1cb20 | 2013-04-30 15:27:22 -0700 | [diff] [blame] | 42 | |
Tejun Heo | 2eaebdb3 | 2013-01-18 14:05:55 -0800 | [diff] [blame] | 43 | unsigned long last_active; /* L: last active timestamp */ |
| 44 | unsigned int flags; /* X: flags */ |
| 45 | int id; /* I: worker id */ |
| 46 | |
Tejun Heo | 3d1cb20 | 2013-04-30 15:27:22 -0700 | [diff] [blame] | 47 | /* |
| 48 | * Opaque string set with work_set_desc(). Printed out with task |
| 49 | * dump for debugging - WARN, BUG, panic or sysrq. |
| 50 | */ |
| 51 | char desc[WORKER_DESC_LEN]; |
| 52 | |
Tejun Heo | 2eaebdb3 | 2013-01-18 14:05:55 -0800 | [diff] [blame] | 53 | /* used only by rescuers to point to the target workqueue */ |
| 54 | struct workqueue_struct *rescue_wq; /* I: the workqueue to rescue */ |
| 55 | }; |
| 56 | |
Tejun Heo | 84b233a | 2013-01-18 14:05:56 -0800 | [diff] [blame] | 57 | /** |
| 58 | * current_wq_worker - return struct worker if %current is a workqueue worker |
| 59 | */ |
| 60 | static inline struct worker *current_wq_worker(void) |
| 61 | { |
| 62 | if (current->flags & PF_WQ_WORKER) |
| 63 | return kthread_data(current); |
| 64 | return NULL; |
| 65 | } |
| 66 | |
Tejun Heo | ea13844 | 2013-01-18 14:05:55 -0800 | [diff] [blame] | 67 | /* |
| 68 | * Scheduler hooks for concurrency managed workqueue. Only to be used from |
Viresh Kumar | 0a0fca9 | 2013-06-04 13:10:24 +0530 | [diff] [blame] | 69 | * sched/core.c and workqueue.c. |
Tejun Heo | ea13844 | 2013-01-18 14:05:55 -0800 | [diff] [blame] | 70 | */ |
Tejun Heo | d84ff05 | 2013-03-12 11:29:59 -0700 | [diff] [blame] | 71 | void wq_worker_waking_up(struct task_struct *task, int cpu); |
| 72 | struct task_struct *wq_worker_sleeping(struct task_struct *task, int cpu); |
Tejun Heo | ea13844 | 2013-01-18 14:05:55 -0800 | [diff] [blame] | 73 | |
| 74 | #endif /* _KERNEL_WORKQUEUE_INTERNAL_H */ |