From 8a6d48c0542876eb3acfc0970c0ab7872db08d5f Mon Sep 17 00:00:00 2001 From: Zheng Da Date: Sun, 6 Dec 2009 05:26:23 +0100 Subject: check in the original version of dde linux26. --- .../contrib/include/linux/pid_namespace.h | 86 ++++++++++++++++++++++ 1 file changed, 86 insertions(+) create mode 100644 libdde_linux26/contrib/include/linux/pid_namespace.h (limited to 'libdde_linux26/contrib/include/linux/pid_namespace.h') diff --git a/libdde_linux26/contrib/include/linux/pid_namespace.h b/libdde_linux26/contrib/include/linux/pid_namespace.h new file mode 100644 index 00000000..38d10326 --- /dev/null +++ b/libdde_linux26/contrib/include/linux/pid_namespace.h @@ -0,0 +1,86 @@ +#ifndef _LINUX_PID_NS_H +#define _LINUX_PID_NS_H + +#include +#include +#include +#include +#include + +struct pidmap { + atomic_t nr_free; + void *page; +}; + +#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; + +#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 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 + +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) +{ +} + + +static inline void zap_pid_ns_processes(struct pid_namespace *ns) +{ + 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 */ -- cgit v1.2.3