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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 | |
10 | #include <linux/workqueue.h> |
11 | #include <linux/kthread.h> |
12 | |
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 */ |
31 | struct pool_workqueue *current_pwq; /* L: current_work's pwq */ |
32 | bool desc_valid; /* ->desc is valid */ |
33 | struct list_head scheduled; /* L: scheduled works */ |
34 | |
35 | /* 64 bytes boundary on 64bit, 32 on 32bit */ |
36 | |
37 | struct task_struct *task; /* I: worker task */ |
38 | struct worker_pool *pool; /* I: the associated pool */ |
39 | /* L: for rescuers */ |
40 | |
41 | unsigned long last_active; /* L: last active timestamp */ |
42 | unsigned int flags; /* X: flags */ |
43 | int id; /* I: worker id */ |
44 | |
45 | /* |
46 | * Opaque string set with work_set_desc(). Printed out with task |
47 | * dump for debugging - WARN, BUG, panic or sysrq. |
48 | */ |
49 | char desc[WORKER_DESC_LEN]; |
50 | |
51 | /* used only by rescuers to point to the target workqueue */ |
52 | struct workqueue_struct *rescue_wq; /* I: the workqueue to rescue */ |
53 | }; |
54 | |
55 | /** |
56 | * current_wq_worker - return struct worker if %current is a workqueue worker |
57 | */ |
58 | static inline struct worker *current_wq_worker(void) |
59 | { |
60 | if (current->flags & PF_WQ_WORKER) |
61 | return kthread_data(current); |
62 | return NULL; |
63 | } |
64 | |
65 | /* |
66 | * Scheduler hooks for concurrency managed workqueue. Only to be used from |
67 | * sched/core.c and workqueue.c. |
68 | */ |
69 | void wq_worker_waking_up(struct task_struct *task, int cpu); |
70 | struct task_struct *wq_worker_sleeping(struct task_struct *task, int cpu); |
71 | |
72 | #endif /* _KERNEL_WORKQUEUE_INTERNAL_H */ |
73 |
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