linux/kernel/cgroup/cpuset-internal.h

/* SPDX-License-Identifier: GPL-2.0-or-later */

#ifndef __CPUSET_INTERNAL_H
#define __CPUSET_INTERNAL_H

#include <linux/cgroup.h>
#include <linux/cpu.h>
#include <linux/cpumask.h>
#include <linux/cpuset.h>
#include <linux/spinlock.h>
#include <linux/union_find.h>

/* See "Frequency meter" comments, below. */

struct fmeter { … };

/*
 * Invalid partition error code
 */
enum prs_errcode { … };

/* bits in struct cpuset flags field */
cpuset_flagbits_t;

/* The various types of files and directories in a cpuset file system */

cpuset_filetype_t;

struct cpuset { … };

static inline struct cpuset *css_cs(struct cgroup_subsys_state *css)
{ … }

/* Retrieve the cpuset for a task */
static inline struct cpuset *task_cs(struct task_struct *task)
{ … }

static inline struct cpuset *parent_cs(struct cpuset *cs)
{ … }

/* convenient tests for these bits */
static inline bool is_cpuset_online(struct cpuset *cs)
{ … }

static inline int is_cpu_exclusive(const struct cpuset *cs)
{ … }

static inline int is_mem_exclusive(const struct cpuset *cs)
{ … }

static inline int is_mem_hardwall(const struct cpuset *cs)
{ … }

static inline int is_sched_load_balance(const struct cpuset *cs)
{ … }

static inline int is_memory_migrate(const struct cpuset *cs)
{ … }

static inline int is_spread_page(const struct cpuset *cs)
{ … }

static inline int is_spread_slab(const struct cpuset *cs)
{ … }

/**
 * cpuset_for_each_child - traverse online children of a cpuset
 * @child_cs: loop cursor pointing to the current child
 * @pos_css: used for iteration
 * @parent_cs: target cpuset to walk children of
 *
 * Walk @child_cs through the online children of @parent_cs.  Must be used
 * with RCU read locked.
 */
#define cpuset_for_each_child(child_cs, pos_css, parent_cs) …

/**
 * cpuset_for_each_descendant_pre - pre-order walk of a cpuset's descendants
 * @des_cs: loop cursor pointing to the current descendant
 * @pos_css: used for iteration
 * @root_cs: target cpuset to walk ancestor of
 *
 * Walk @des_cs through the online descendants of @root_cs.  Must be used
 * with RCU read locked.  The caller may modify @pos_css by calling
 * css_rightmost_descendant() to skip subtree.  @root_cs is included in the
 * iteration and the first node to be visited.
 */
#define cpuset_for_each_descendant_pre(des_cs, pos_css, root_cs) …

void rebuild_sched_domains_locked(void);
void cpuset_callback_lock_irq(void);
void cpuset_callback_unlock_irq(void);
void cpuset_update_tasks_cpumask(struct cpuset *cs, struct cpumask *new_cpus);
void cpuset_update_tasks_nodemask(struct cpuset *cs);
int cpuset_update_flag(cpuset_flagbits_t bit, struct cpuset *cs, int turning_on);
ssize_t cpuset_write_resmask(struct kernfs_open_file *of,
				    char *buf, size_t nbytes, loff_t off);
int cpuset_common_seq_show(struct seq_file *sf, void *v);

/*
 * cpuset-v1.c
 */
#ifdef CONFIG_CPUSETS_V1
extern struct cftype cpuset1_files[];
void fmeter_init(struct fmeter *fmp);
void cpuset1_update_task_spread_flags(struct cpuset *cs,
					struct task_struct *tsk);
void cpuset1_update_tasks_flags(struct cpuset *cs);
void cpuset1_hotplug_update_tasks(struct cpuset *cs,
			    struct cpumask *new_cpus, nodemask_t *new_mems,
			    bool cpus_updated, bool mems_updated);
int cpuset1_validate_change(struct cpuset *cur, struct cpuset *trial);
#else
static inline void fmeter_init(struct fmeter *fmp) {}
static inline void cpuset1_update_task_spread_flags(struct cpuset *cs,
					struct task_struct *tsk) {}
static inline void cpuset1_update_tasks_flags(struct cpuset *cs) {}
static inline void cpuset1_hotplug_update_tasks(struct cpuset *cs,
			    struct cpumask *new_cpus, nodemask_t *new_mems,
			    bool cpus_updated, bool mems_updated) {}
static inline int cpuset1_validate_change(struct cpuset *cur,
				struct cpuset *trial) { return 0; }
#endif /* CONFIG_CPUSETS_V1 */

#endif /* __CPUSET_INTERNAL_H */