114 lines
2.8 KiB
C
114 lines
2.8 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/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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#if defined(CONFIG_SYSCTL) && defined(CONFIG_MEMFD_CREATE)
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/*
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* sysctl for vm.memfd_noexec
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* 0: memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL
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* acts like MFD_EXEC was set.
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* 1: memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL
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* acts like MFD_NOEXEC_SEAL was set.
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* 2: memfd_create() without MFD_NOEXEC_SEAL will be
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* rejected.
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*/
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#define MEMFD_NOEXEC_SCOPE_EXEC 0
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#define MEMFD_NOEXEC_SCOPE_NOEXEC_SEAL 1
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#define MEMFD_NOEXEC_SCOPE_NOEXEC_ENFORCED 2
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#endif
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struct pid_namespace {
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struct idr idr;
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struct rcu_head rcu;
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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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#if defined(CONFIG_SYSCTL) && defined(CONFIG_MEMFD_CREATE)
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/* sysctl for vm.memfd_noexec */
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int memfd_noexec_scope;
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#endif
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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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refcount_inc(&ns->ns.count);
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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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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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