#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/threads.h>
-#include <linux/pid.h>
#include <linux/nsproxy.h>
#include <linux/kref.h>
#define PIDMAP_ENTRIES ((PID_MAX_LIMIT + 8*PAGE_SIZE - 1)/PAGE_SIZE/8)
+struct bsd_acct_struct;
+
struct pid_namespace {
struct kref kref;
struct pidmap pidmap[PIDMAP_ENTRIES];
int last_pid;
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;
+#endif
+#ifdef CONFIG_BSD_PROCESS_ACCT
+ struct bsd_acct_struct *bacct;
+#endif
};
extern struct pid_namespace init_pid_ns;
-static inline void get_pid_ns(struct pid_namespace *ns)
+#ifdef CONFIG_PID_NS
+static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns)
{
- kref_get(&ns->kref);
+ if (ns != &init_pid_ns)
+ kref_get(&ns->kref);
+ return ns;
}
extern struct pid_namespace *copy_pid_ns(unsigned long flags, struct pid_namespace *ns);
extern void free_pid_ns(struct kref *kref);
+extern void zap_pid_ns_processes(struct pid_namespace *pid_ns);
+
+static inline void put_pid_ns(struct pid_namespace *ns)
+{
+ if (ns != &init_pid_ns)
+ kref_put(&ns->kref, free_pid_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 pid_namespace *ns)
+{
+ if (flags & CLONE_NEWPID)
+ ns = ERR_PTR(-EINVAL);
+ return ns;
+}
static inline void put_pid_ns(struct pid_namespace *ns)
{
- kref_put(&ns->kref, free_pid_ns);
}
-static inline struct task_struct *child_reaper(struct task_struct *tsk)
+
+static inline void zap_pid_ns_processes(struct pid_namespace *ns)
{
- return init_pid_ns.child_reaper;
+ BUG();
}
+#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 */