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Commit | Line | Data |
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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 | struct list_head node; /* A: anchored at pool->workers */ | |
41 | /* A: runs through worker->node */ | |
42 | ||
43 | unsigned long last_active; /* L: last active timestamp */ | |
44 | unsigned int flags; /* X: flags */ | |
45 | int id; /* I: worker id */ | |
46 | ||
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 | ||
53 | /* used only by rescuers to point to the target workqueue */ | |
54 | struct workqueue_struct *rescue_wq; /* I: the workqueue to rescue */ | |
55 | }; | |
56 | ||
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 | ||
67 | /* | |
68 | * Scheduler hooks for concurrency managed workqueue. Only to be used from | |
69 | * sched/core.c and workqueue.c. | |
70 | */ | |
71 | void wq_worker_waking_up(struct task_struct *task, int cpu); | |
72 | struct task_struct *wq_worker_sleeping(struct task_struct *task); | |
73 | ||
74 | #endif /* _KERNEL_WORKQUEUE_INTERNAL_H */ |