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[PATCH] to nsproxy

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Add the pid namespace framework to the nsproxy object.  The copy of the pid
namespace only increases the refcount on the global pid namespace,
init_pid_ns, and unshare is not implemented.

There is no configuration option to activate or deactivate this feature
because this not relevant for the moment.

Signed-off-by: Cedric Le Goater <clg@fr.ibm.com>
Cc: Kirill Korotaev <dev@openvz.org>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Herbert Poetzl <herbert@13thfloor.at>
Cc: Sukadev Bhattiprolu <sukadev@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Cedric Le Goater
2006-12-08 02:37:59 -08:00
committed by Linus Torvalds
parent 61a58c6c23
commit 9a575a92db
5 changed files with 64 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/linux/init_task.h
+2
View File
@@ -7,6 +7,7 @@
#include <linux/utsname.h>
#include <linux/lockdep.h>
#include <linux/ipc.h>
#include <linux/pid_namespace.h>
#define INIT_FDTABLE \
{ \
@@ -73,6 +74,7 @@
extern struct nsproxy init_nsproxy;
#define INIT_NSPROXY(nsproxy) { \
.pid_ns = &init_pid_ns, \
.count = ATOMIC_INIT(1), \
.nslock = __SPIN_LOCK_UNLOCKED(nsproxy.nslock), \
.id = 0, \
include/linux/nsproxy.h
+2
View File
@@ -7,6 +7,7 @@
struct mnt_namespace;
struct uts_namespace;
struct ipc_namespace;
struct pid_namespace;
/*
* A structure to contain pointers to all per-process
@@ -27,6 +28,7 @@ struct nsproxy {
struct uts_namespace *uts_ns;
struct ipc_namespace *ipc_ns;
struct mnt_namespace *mnt_ns;
struct pid_namespace *pid_ns;
};
extern struct nsproxy init_nsproxy;
include/linux/pid_namespace.h
+18 -2
View File
@@ -5,6 +5,8 @@
#include <linux/mm.h>
#include <linux/threads.h>
#include <linux/pid.h>
#include <linux/nsproxy.h>
#include <linux/kref.h>
struct pidmap {
atomic_t nr_free;
@@ -14,10 +16,24 @@ struct pidmap {
#define PIDMAP_ENTRIES ((PID_MAX_LIMIT + 8*PAGE_SIZE - 1)/PAGE_SIZE/8)
struct pid_namespace {
struct pidmap pidmap[PIDMAP_ENTRIES];
int last_pid;
struct kref kref;
struct pidmap pidmap[PIDMAP_ENTRIES];
int last_pid;
};
extern struct pid_namespace init_pid_ns;
static inline void get_pid_ns(struct pid_namespace *ns)
{
kref_get(&ns->kref);
}
extern int copy_pid_ns(int flags, struct task_struct *tsk);
extern void free_pid_ns(struct kref *kref);
static inline void put_pid_ns(struct pid_namespace *ns)
{
kref_put(&ns->kref, free_pid_ns);
}
#endif /* _LINUX_PID_NS_H */