* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation, version 2 of the
* License.
+ *
+ * Jun 2006 - namespaces support
+ * OpenVZ, SWsoft Inc.
+ * Pavel Emelianov <xemul@openvz.org>
*/
#include <linux/module.h>
#include <linux/version.h>
#include <linux/nsproxy.h>
#include <linux/init_task.h>
+#include <linux/mnt_namespace.h>
+#include <linux/utsname.h>
+#include <linux/pid_namespace.h>
struct nsproxy init_nsproxy = INIT_NSPROXY(init_nsproxy);
{
struct nsproxy *ns;
- ns = kmalloc(sizeof(struct nsproxy), GFP_KERNEL);
- if (ns) {
- memcpy(ns, orig, sizeof(struct nsproxy));
+ ns = kmemdup(orig, sizeof(struct nsproxy), GFP_KERNEL);
+ if (ns)
atomic_set(&ns->count, 1);
- }
return ns;
}
{
struct nsproxy *ns = clone_namespaces(orig);
+ if (ns) {
+ if (ns->mnt_ns)
+ get_mnt_ns(ns->mnt_ns);
+ if (ns->uts_ns)
+ get_uts_ns(ns->uts_ns);
+ if (ns->ipc_ns)
+ get_ipc_ns(ns->ipc_ns);
+ if (ns->pid_ns)
+ get_pid_ns(ns->pid_ns);
+ }
+
return ns;
}
int copy_namespaces(int flags, struct task_struct *tsk)
{
struct nsproxy *old_ns = tsk->nsproxy;
+ struct nsproxy *new_ns;
+ int err = 0;
if (!old_ns)
return 0;
get_nsproxy(old_ns);
- return 0;
+ if (!(flags & (CLONE_NEWNS | CLONE_NEWUTS | CLONE_NEWIPC)))
+ return 0;
+
+ new_ns = clone_namespaces(old_ns);
+ if (!new_ns) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ tsk->nsproxy = new_ns;
+
+ err = copy_mnt_ns(flags, tsk);
+ if (err)
+ goto out_ns;
+
+ err = copy_utsname(flags, tsk);
+ if (err)
+ goto out_uts;
+
+ err = copy_ipcs(flags, tsk);
+ if (err)
+ goto out_ipc;
+
+ err = copy_pid_ns(flags, tsk);
+ if (err)
+ goto out_pid;
+
+out:
+ put_nsproxy(old_ns);
+ return err;
+
+out_pid:
+ if (new_ns->ipc_ns)
+ put_ipc_ns(new_ns->ipc_ns);
+out_ipc:
+ if (new_ns->uts_ns)
+ put_uts_ns(new_ns->uts_ns);
+out_uts:
+ if (new_ns->mnt_ns)
+ put_mnt_ns(new_ns->mnt_ns);
+out_ns:
+ tsk->nsproxy = old_ns;
+ kfree(new_ns);
+ goto out;
}
void free_nsproxy(struct nsproxy *ns)
{
- kfree(ns);
+ if (ns->mnt_ns)
+ put_mnt_ns(ns->mnt_ns);
+ if (ns->uts_ns)
+ put_uts_ns(ns->uts_ns);
+ if (ns->ipc_ns)
+ put_ipc_ns(ns->ipc_ns);
+ if (ns->pid_ns)
+ put_pid_ns(ns->pid_ns);
+ kfree(ns);
}