mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-20 11:13:58 +08:00
74bd59bb39
Just like with the user namespaces, move the namespace management code into the separate .c file and mark the (already existing) PID_NS option as "depend on NAMESPACES" [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Acked-by: Serge Hallyn <serue@us.ibm.com> Cc: Cedric Le Goater <clg@fr.ibm.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Herbert Poetzl <herbert@13thfloor.at> Cc: Kirill Korotaev <dev@sw.ru> Cc: Sukadev Bhattiprolu <sukadev@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
89 lines
1.8 KiB
C
89 lines
1.8 KiB
C
#ifndef _LINUX_PID_NS_H
|
|
#define _LINUX_PID_NS_H
|
|
|
|
#include <linux/sched.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/threads.h>
|
|
#include <linux/nsproxy.h>
|
|
#include <linux/kref.h>
|
|
|
|
struct pidmap {
|
|
atomic_t nr_free;
|
|
void *page;
|
|
};
|
|
|
|
#define PIDMAP_ENTRIES ((PID_MAX_LIMIT + 8*PAGE_SIZE - 1)/PAGE_SIZE/8)
|
|
|
|
struct pid_namespace {
|
|
struct kref kref;
|
|
struct pidmap pidmap[PIDMAP_ENTRIES];
|
|
int last_pid;
|
|
struct task_struct *child_reaper;
|
|
struct kmem_cache *pid_cachep;
|
|
int level;
|
|
struct pid_namespace *parent;
|
|
#ifdef CONFIG_PROC_FS
|
|
struct vfsmount *proc_mnt;
|
|
#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 <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)
|
|
{
|
|
}
|
|
|
|
|
|
static inline void zap_pid_ns_processes(struct pid_namespace *ns)
|
|
{
|
|
BUG();
|
|
}
|
|
#endif /* CONFIG_PID_NS */
|
|
|
|
static inline struct pid_namespace *task_active_pid_ns(struct task_struct *tsk)
|
|
{
|
|
return tsk->nsproxy->pid_ns;
|
|
}
|
|
|
|
static inline struct task_struct *task_child_reaper(struct task_struct *tsk)
|
|
{
|
|
BUG_ON(tsk != current);
|
|
return tsk->nsproxy->pid_ns->child_reaper;
|
|
}
|
|
|
|
#endif /* _LINUX_PID_NS_H */
|