[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / pid_namespace.h

#ifndef _LINUX_PID_NS_H
#define _LINUX_PID_NS_H

#include <linux/sched.h>
#include <linux/bug.h>
#include <linux/mm.h>
#include <linux/workqueue.h>
#include <linux/threads.h>
#include <linux/nsproxy.h>
#include <linux/kref.h>

struct pidmap {
       atomic_t nr_free;
       void *page;
};

#define BITS_PER_PAGE		(PAGE_SIZE * 8)
#define BITS_PER_PAGE_MASK	(BITS_PER_PAGE-1)
#define PIDMAP_ENTRIES		((PID_MAX_LIMIT+BITS_PER_PAGE-1)/BITS_PER_PAGE)

struct bsd_acct_struct;

struct pid_namespace {
	struct kref kref;
	struct pidmap pidmap[PIDMAP_ENTRIES];
	int last_pid;
	unsigned int nr_hashed;
	struct task_struct *child_reaper;
	struct kmem_cache *pid_cachep;
	unsigned int level;
	struct pid_namespace *parent;
#ifdef CONFIG_PROC_FS
	struct vfsmount *proc_mnt;
	struct dentry *proc_self;
#endif
#ifdef CONFIG_BSD_PROCESS_ACCT
	struct bsd_acct_struct *bacct;
#endif
	struct user_namespace *user_ns;
	struct work_struct proc_work;
	kgid_t pid_gid;
	int hide_pid;
	int reboot;	/* group exit code if this pidns was rebooted */
	unsigned int proc_inum;
};

extern struct pid_namespace init_pid_ns;

#define PIDNS_HASH_ADDING (1U << 31)

#ifdef CONFIG_PID_NS
static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns)
{
	if (ns != &init_pid_ns)
		kref_get(&ns->kref);
	return ns;
}

extern struct pid_namespace *copy_pid_ns(unsigned long flags,
	struct user_namespace *user_ns, struct pid_namespace *ns);
extern void zap_pid_ns_processes(struct pid_namespace *pid_ns);
extern int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd);
extern void put_pid_ns(struct pid_namespace *ns);

#else /* !CONFIG_PID_NS */
#include <linux/err.h>

static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns)
{
	return ns;
}

static inline struct pid_namespace *copy_pid_ns(unsigned long flags,
	struct user_namespace *user_ns, struct pid_namespace *ns)
{
	if (flags & CLONE_NEWPID)
		ns = ERR_PTR(-EINVAL);
	return ns;
}

static inline void put_pid_ns(struct pid_namespace *ns)
{
}

static inline void zap_pid_ns_processes(struct pid_namespace *ns)
{
	BUG();
}

static inline int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd)
{
	return 0;
}
#endif /* CONFIG_PID_NS */

extern struct pid_namespace *task_active_pid_ns(struct task_struct *tsk);
void pidhash_init(void);
void pidmap_init(void);

#endif /* _LINUX_PID_NS_H */
Commit	Line	Data
61a58c6c SB	1	#ifndef _LINUX_PID_NS_H
61a58c6c SB	2	#define _LINUX_PID_NS_H
aa5a6662 SB	3
aa5a6662 SB	4	#include <linux/sched.h>
187f1882	5	#include <linux/bug.h>
aa5a6662	6	#include <linux/mm.h>
a27bb332	7	#include <linux/workqueue.h>
aa5a6662	8	#include <linux/threads.h>
9a575a92 CLG	9	#include <linux/nsproxy.h>
9a575a92 CLG	10	#include <linux/kref.h>
aa5a6662 SB	11
	12	struct pidmap {
	13	atomic_t nr_free;
	14	void *page;
	15	};
	16
5cc54451 RC	17	#define BITS_PER_PAGE (PAGE_SIZE * 8)
	18	#define BITS_PER_PAGE_MASK (BITS_PER_PAGE-1)
	19	#define PIDMAP_ENTRIES ((PID_MAX_LIMIT+BITS_PER_PAGE-1)/BITS_PER_PAGE)
aa5a6662	20
20fad13a PE	21	struct bsd_acct_struct;
20fad13a PE	22
61a58c6c	23	struct pid_namespace {
9a575a92 CLG	24	struct kref kref;
	25	struct pidmap pidmap[PIDMAP_ENTRIES];
	26	int last_pid;
c876ad76	27	unsigned int nr_hashed;
84d73786	28	struct task_struct *child_reaper;
baf8f0f8	29	struct kmem_cache *pid_cachep;
caafa432	30	unsigned int level;
faacbfd3	31	struct pid_namespace *parent;
07543f5c PE	32	#ifdef CONFIG_PROC_FS
07543f5c PE	33	struct vfsmount *proc_mnt;
021ada7d	34	struct dentry *proc_self;
07543f5c	35	#endif
20fad13a PE	36	#ifdef CONFIG_BSD_PROCESS_ACCT
	37	struct bsd_acct_struct *bacct;
	38	#endif
49f4d8b9	39	struct user_namespace *user_ns;
0a01f2cc	40	struct work_struct proc_work;
dcb0f222	41	kgid_t pid_gid;
0499680a	42	int hide_pid;
cf3f8921	43	int reboot; /* group exit code if this pidns was rebooted */
98f842e6	44	unsigned int proc_inum;
3fbc9648 SB	45	};
3fbc9648 SB	46
61a58c6c	47	extern struct pid_namespace init_pid_ns;
3fbc9648	48
c876ad76 EB	49	#define PIDNS_HASH_ADDING (1U << 31)
c876ad76 EB	50
57d5f66b	51	#ifdef CONFIG_PID_NS
a05f7b15	52	static inline struct pid_namespace get_pid_ns(struct pid_namespace ns)
9a575a92	53	{
b461cc03 PE	54	if (ns != &init_pid_ns)
b461cc03 PE	55	kref_get(&ns->kref);
a05f7b15	56	return ns;
9a575a92 CLG	57	}
9a575a92 CLG	58
49f4d8b9 EB	59	extern struct pid_namespace *copy_pid_ns(unsigned long flags,
49f4d8b9 EB	60	struct user_namespace user_ns, struct pid_namespace ns);
74bd59bb	61	extern void zap_pid_ns_processes(struct pid_namespace *pid_ns);
cf3f8921	62	extern int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd);
bbc2e3ef	63	extern void put_pid_ns(struct pid_namespace *ns);
9a575a92	64
57d5f66b EB	65	#else /* !CONFIG_PID_NS */
	66	#include <linux/err.h>
	67
	68	static inline struct pid_namespace get_pid_ns(struct pid_namespace ns)
	69	{
	70	return ns;
	71	}
	72
49f4d8b9 EB	73	static inline struct pid_namespace *copy_pid_ns(unsigned long flags,
49f4d8b9 EB	74	struct user_namespace user_ns, struct pid_namespace ns)
57d5f66b EB	75	{
	76	if (flags & CLONE_NEWPID)
	77	ns = ERR_PTR(-EINVAL);
	78	return ns;
	79	}
	80
	81	static inline void put_pid_ns(struct pid_namespace *ns)
	82	{
	83	}
	84
74bd59bb PE	85	static inline void zap_pid_ns_processes(struct pid_namespace *ns)
	86	{
	87	BUG();
	88	}
cf3f8921 DL	89
	90	static inline int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd)
	91	{
	92	return 0;
	93	}
57d5f66b EB	94	#endif /* CONFIG_PID_NS */
57d5f66b EB	95
61bce0f1	96	extern struct pid_namespace task_active_pid_ns(struct task_struct tsk);
3ae4eed3 AB	97	void pidhash_init(void);
	98	void pidmap_init(void);
	99
61a58c6c	100	#endif /* _LINUX_PID_NS_H */