165 lines
3.8 KiB
C
165 lines
3.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_PID_NS_H
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#define _LINUX_PID_NS_H
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#include <linux/sched.h>
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#include <linux/bug.h>
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#include <linux/mm.h>
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#include <linux/workqueue.h>
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#include <linux/threads.h>
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#include <linux/nsproxy.h>
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#include <linux/kref.h>
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#include <linux/ns_common.h>
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#include <linux/idr.h>
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/* MAX_PID_NS_LEVEL is needed for limiting size of 'struct pid' */
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#define MAX_PID_NS_LEVEL 32
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struct fs_pin;
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struct pid_namespace {
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struct kref kref;
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struct idr idr;
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struct rcu_head rcu;
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#ifdef CONFIG_MAX_PID_PER_NS
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int pid_max;
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#endif
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unsigned int pid_allocated;
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struct task_struct *child_reaper;
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struct kmem_cache *pid_cachep;
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unsigned int level;
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struct pid_namespace *parent;
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#ifdef CONFIG_BSD_PROCESS_ACCT
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struct fs_pin *bacct;
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#endif
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struct user_namespace *user_ns;
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struct ucounts *ucounts;
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int reboot; /* group exit code if this pidns was rebooted */
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struct ns_common ns;
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} __randomize_layout;
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extern struct pid_namespace init_pid_ns;
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#define PIDNS_ADDING (1U << 31)
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#ifdef CONFIG_PID_NS
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static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns)
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{
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if (ns != &init_pid_ns)
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kref_get(&ns->kref);
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return ns;
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}
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extern struct pid_namespace *copy_pid_ns(unsigned long flags,
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struct user_namespace *user_ns, struct pid_namespace *ns);
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extern void zap_pid_ns_processes(struct pid_namespace *pid_ns);
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extern int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd);
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extern void put_pid_ns(struct pid_namespace *ns);
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#else /* !CONFIG_PID_NS */
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#include <linux/err.h>
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static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns)
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{
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return ns;
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}
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static inline struct pid_namespace *copy_pid_ns(unsigned long flags,
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struct user_namespace *user_ns, struct pid_namespace *ns)
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{
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if (flags & CLONE_NEWPID)
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ns = ERR_PTR(-EINVAL);
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return ns;
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}
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static inline void put_pid_ns(struct pid_namespace *ns)
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{
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}
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static inline void zap_pid_ns_processes(struct pid_namespace *ns)
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{
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BUG();
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}
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static inline int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd)
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{
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return 0;
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}
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#endif /* CONFIG_PID_NS */
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extern struct pid_namespace *task_active_pid_ns(struct task_struct *tsk);
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void pidhash_init(void);
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void pid_idr_init(void);
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struct rich_container_feature {
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const char *name;
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int id;
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};
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enum rc_feature_id {
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RC_CPUINFO,
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RC_MEMINFO,
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RC_CPUUSAGE,
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RC_UPTIME,
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RC_LOADAVG,
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RC_DISKQUOTA,
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RC_FEATURE_COUNT,
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};
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#ifdef CONFIG_RICH_CONTAINER
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extern int sysctl_rich_container_enable;
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extern u16 rc_feature_disable_mask;
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extern int rich_container_feature_control_handler(struct ctl_table *ro_table,
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int write, void *buffer,
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size_t *lenp, loff_t *ppos);
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#ifndef CONFIG_SCHEDSTATS_HOST
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extern bool __sched_schedstats;
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#endif
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#ifndef CONFIG_RICH_CONTAINER_CG_SWITCH
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extern int sysctl_rich_container_source;
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extern int sysctl_rich_container_cpuinfo_source;
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extern unsigned int sysctl_rich_container_cpuinfo_sharesbase;
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static inline struct task_struct *rich_container_get_scenario(void)
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{
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if (sysctl_rich_container_source == 1)
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return task_active_pid_ns(current)->child_reaper;
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return current;
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}
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#endif
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static inline bool in_rich_container(struct task_struct *tsk,
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enum rc_feature_id id)
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{
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if (sysctl_rich_container_enable == 0)
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return false;
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return (task_active_pid_ns(tsk) != &init_pid_ns)
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&& child_task_group(tsk)
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&& !(rc_feature_disable_mask & (1 << id));
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}
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void rich_container_get_cpuset_cpus(struct cpumask *pmask);
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#else
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static inline bool in_rich_container(struct task_struct *tsk,
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enum rc_feature_id id)
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{
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return false;
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}
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static inline void rich_container_get_cpuset_cpus(struct cpumask *pmask)
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{
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}
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static inline struct task_struct *rich_container_get_scenario(void)
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{
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return NULL;
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}
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#endif
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static inline bool task_is_in_init_pid_ns(struct task_struct *tsk)
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{
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return task_active_pid_ns(tsk) == &init_pid_ns;
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}
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#endif /* _LINUX_PID_NS_H */
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