/* * linux/ipc/namespace.c * Copyright (C) 2006 Pavel Emelyanov OpenVZ, SWsoft Inc. */ #include #include #include #include #include #include #include "util.h" static struct ipc_namespace *clone_ipc_ns(struct ipc_namespace *old_ns) { struct ipc_namespace *ns; ns = kmalloc(sizeof(struct ipc_namespace), GFP_KERNEL); if (ns == NULL) return ERR_PTR(-ENOMEM); sem_init_ns(ns); msg_init_ns(ns); shm_init_ns(ns); kref_init(&ns->kref); return ns; } struct ipc_namespace *copy_ipcs(unsigned long flags, struct ipc_namespace *ns) { struct ipc_namespace *new_ns; BUG_ON(!ns); get_ipc_ns(ns); if (!(flags & CLONE_NEWIPC)) return ns; new_ns = clone_ipc_ns(ns); put_ipc_ns(ns); return new_ns; } void free_ipc_ns(struct kref *kref) { struct ipc_namespace *ns; ns = container_of(kref, struct ipc_namespace, kref); sem_exit_ns(ns); msg_exit_ns(ns); shm_exit_ns(ns); kfree(ns); }