Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / linux / pid_namespace.h

diff --git a/kernel/include/linux/pid_namespace.h b/kernel/include/linux/pid_namespace.h
new file mode 100644 (file)
index 0000000..918b117
--- /dev/null
+++ b/kernel/include/linux/pid_namespace.h
@@ -0,0 +1,103 @@
+#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;
+
+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 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;
+}
+
+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 */