1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_PID_NS_H
3 #define _LINUX_PID_NS_H
5 #include <linux/sched.h>
8 #include <linux/workqueue.h>
9 #include <linux/threads.h>
10 #include <linux/nsproxy.h>
11 #include <linux/kref.h>
12 #include <linux/ns_common.h>
13 #include <linux/idr.h>
15 /* MAX_PID_NS_LEVEL is needed for limiting size of 'struct pid' */
16 #define MAX_PID_NS_LEVEL 32
20 struct pid_namespace
{
24 unsigned int pid_allocated
;
25 struct task_struct
*child_reaper
;
26 struct kmem_cache
*pid_cachep
;
28 struct pid_namespace
*parent
;
29 #ifdef CONFIG_BSD_PROCESS_ACCT
32 struct user_namespace
*user_ns
;
33 struct ucounts
*ucounts
;
34 int reboot
; /* group exit code if this pidns was rebooted */
38 extern struct pid_namespace init_pid_ns
;
40 #define PIDNS_ADDING (1U << 31)
43 static inline struct pid_namespace
*get_pid_ns(struct pid_namespace
*ns
)
45 if (ns
!= &init_pid_ns
)
50 extern struct pid_namespace
*copy_pid_ns(unsigned long flags
,
51 struct user_namespace
*user_ns
, struct pid_namespace
*ns
);
52 extern void zap_pid_ns_processes(struct pid_namespace
*pid_ns
);
53 extern int reboot_pid_ns(struct pid_namespace
*pid_ns
, int cmd
);
54 extern void put_pid_ns(struct pid_namespace
*ns
);
56 #else /* !CONFIG_PID_NS */
57 #include <linux/err.h>
59 static inline struct pid_namespace
*get_pid_ns(struct pid_namespace
*ns
)
64 static inline struct pid_namespace
*copy_pid_ns(unsigned long flags
,
65 struct user_namespace
*user_ns
, struct pid_namespace
*ns
)
67 if (flags
& CLONE_NEWPID
)
68 ns
= ERR_PTR(-EINVAL
);
72 static inline void put_pid_ns(struct pid_namespace
*ns
)
76 static inline void zap_pid_ns_processes(struct pid_namespace
*ns
)
81 static inline int reboot_pid_ns(struct pid_namespace
*pid_ns
, int cmd
)
85 #endif /* CONFIG_PID_NS */
87 extern struct pid_namespace
*task_active_pid_ns(struct task_struct
*tsk
);
88 void pidhash_init(void);
89 void pid_idr_init(void);
91 #endif /* _LINUX_PID_NS_H */