cregit-Linux how code gets into the kernel

Release 4.12 include/linux/pid_namespace.h

Directory: include/linux
#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>
#include <linux/ns_common.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 fs_pin;

enum { /* definitions for pid_namespace's hide_pid field */
	
HIDEPID_OFF	  = 0,
	
HIDEPID_NO_ACCESS = 1,
	
HIDEPID_INVISIBLE = 2,
};


struct pid_namespace {
	
struct kref kref;
	
struct pidmap pidmap[PIDMAP_ENTRIES];
	
struct rcu_head rcu;
	
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;
	
struct dentry *proc_thread_self;
#endif
#ifdef CONFIG_BSD_PROCESS_ACCT
	
struct fs_pin *bacct;
#endif
	
struct user_namespace *user_ns;
	
struct ucounts *ucounts;
	
struct work_struct proc_work;
	
kgid_t pid_gid;
	
int hide_pid;
	
int reboot;	/* group exit code if this pidns was rebooted */
	
struct ns_common ns;
};

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; }

Contributors

PersonTokensPropCommitsCommitProp
Cédric Le Goater1959.38%133.33%
Pavel Emelyanov1340.62%266.67%
Total32100.00%3100.00%

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; }

Contributors

PersonTokensPropCommitsCommitProp
Eric W. Biedermann17100.00%1100.00%
Total17100.00%1100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Eric W. Biedermann40100.00%2100.00%
Total40100.00%2100.00%


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

Contributors

PersonTokensPropCommitsCommitProp
Eric W. Biedermann11100.00%1100.00%
Total11100.00%1100.00%


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

Contributors

PersonTokensPropCommitsCommitProp
Pavel Emelyanov15100.00%1100.00%
Total15100.00%1100.00%


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

Contributors

PersonTokensPropCommitsCommitProp
Daniel Lezcano18100.00%1100.00%
Total18100.00%1100.00%

#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 */

Overall Contributors

PersonTokensPropCommitsCommitProp
Eric W. Biedermann11828.64%1027.03%
Pavel Emelyanov7117.23%821.62%
Sukadev Bhattiprolu7016.99%513.51%
Cédric Le Goater4611.17%12.70%
Daniel Lezcano358.50%12.70%
Al Viro174.13%410.81%
Lafcadio Wluiki163.88%12.70%
Adrian Bunk122.91%12.70%
Raphael S. Carvalho92.18%12.70%
Vasiliy Kulikov51.21%12.70%
Badari Pulavarty51.21%12.70%
Paul Gortmaker30.73%12.70%
Kent Overstreet30.73%12.70%
Cyrill V. Gorcunov20.49%12.70%
Total412100.00%37100.00%
Directory: include/linux
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