| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | #ifndef _KERNEL_SCHED_AUTOGROUP_H |
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| 3 | #define _KERNEL_SCHED_AUTOGROUP_H |
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| 4 | |
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| 5 | #ifdef CONFIG_SCHED_AUTOGROUP |
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| 6 | |
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| 7 | struct autogroup { |
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| 8 | /* |
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| 9 | * Reference doesn't mean how many threads attach to this |
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| 10 | * autogroup now. It just stands for the number of tasks |
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| 11 | * which could use this autogroup. |
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| 12 | */ |
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| 13 | struct kref kref; |
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| 14 | struct task_group *tg; |
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| 15 | struct rw_semaphore lock; |
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| 16 | unsigned long id; |
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| 17 | int nice; |
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| 18 | }; |
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| 19 | |
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| 20 | extern void autogroup_init(struct task_struct *init_task); |
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| 21 | extern void autogroup_free(struct task_group *tg); |
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| 22 | |
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| 23 | static inline bool task_group_is_autogroup(struct task_group *tg) |
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| 24 | { |
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| 25 | return !!tg->autogroup; |
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| 26 | } |
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| 27 | |
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| 28 | extern bool task_wants_autogroup(struct task_struct *p, struct task_group *tg); |
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| 29 | |
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| 30 | static inline struct task_group * |
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| 31 | autogroup_task_group(struct task_struct *p, struct task_group *tg) |
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| 32 | { |
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| 33 | extern unsigned int sysctl_sched_autogroup_enabled; |
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| 34 | int enabled = READ_ONCE(sysctl_sched_autogroup_enabled); |
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| 35 | |
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| 36 | if (enabled && task_wants_autogroup(p, tg)) |
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| 37 | return p->signal->autogroup->tg; |
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| 38 | |
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| 39 | return tg; |
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| 40 | } |
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| 41 | |
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| 42 | extern int autogroup_path(struct task_group *tg, char *buf, int buflen); |
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| 43 | |
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| 44 | #else /* !CONFIG_SCHED_AUTOGROUP */ |
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| 45 | |
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| 46 | static inline void autogroup_init(struct task_struct *init_task) { } |
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| 47 | static inline void autogroup_free(struct task_group *tg) { } |
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| 48 | static inline bool task_group_is_autogroup(struct task_group *tg) |
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| 49 | { |
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| 50 | return 0; |
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| 51 | } |
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| 52 | |
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| 53 | static inline struct task_group * |
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| 54 | autogroup_task_group(struct task_struct *p, struct task_group *tg) |
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| 55 | { |
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| 56 | return tg; |
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| 57 | } |
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| 58 | |
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| 59 | static inline int autogroup_path(struct task_group *tg, char *buf, int buflen) |
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| 60 | { |
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| 61 | return 0; |
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| 62 | } |
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| 63 | |
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| 64 | #endif /* CONFIG_SCHED_AUTOGROUP */ |
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| 65 | |
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| 66 | #endif /* _KERNEL_SCHED_AUTOGROUP_H */ |
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| 67 | |
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