pid_namespace.h 943 B

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  1. #ifndef _LINUX_PID_NS_H
  2. #define _LINUX_PID_NS_H
  3. #include <linux/sched.h>
  4. #include <linux/mm.h>
  5. #include <linux/threads.h>
  6. #include <linux/pid.h>
  7. #include <linux/nsproxy.h>
  8. #include <linux/kref.h>
  9. struct pidmap {
  10. atomic_t nr_free;
  11. void *page;
  12. };
  13. #define PIDMAP_ENTRIES ((PID_MAX_LIMIT + 8*PAGE_SIZE - 1)/PAGE_SIZE/8)
  14. struct pid_namespace {
  15. struct kref kref;
  16. struct pidmap pidmap[PIDMAP_ENTRIES];
  17. int last_pid;
  18. struct task_struct *child_reaper;
  19. };
  20. extern struct pid_namespace init_pid_ns;
  21. static inline void get_pid_ns(struct pid_namespace *ns)
  22. {
  23. kref_get(&ns->kref);
  24. }
  25. extern int copy_pid_ns(int flags, struct task_struct *tsk);
  26. extern void free_pid_ns(struct kref *kref);
  27. static inline void put_pid_ns(struct pid_namespace *ns)
  28. {
  29. kref_put(&ns->kref, free_pid_ns);
  30. }
  31. static inline struct task_struct *child_reaper(struct task_struct *tsk)
  32. {
  33. return init_pid_ns.child_reaper;
  34. }
  35. #endif /* _LINUX_PID_NS_H */