mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 06:40:54 +07:00
74 lines
1.2 KiB
C
74 lines
1.2 KiB
C
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/*
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* linux/ipc/namespace.c
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* Copyright (C) 2006 Pavel Emelyanov <xemul@openvz.org> OpenVZ, SWsoft Inc.
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*/
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#include <linux/ipc.h>
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#include <linux/msg.h>
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#include <linux/ipc_namespace.h>
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#include <linux/rcupdate.h>
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#include <linux/nsproxy.h>
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#include <linux/slab.h>
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#include "util.h"
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static struct ipc_namespace *clone_ipc_ns(struct ipc_namespace *old_ns)
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{
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int err;
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struct ipc_namespace *ns;
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err = -ENOMEM;
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ns = kmalloc(sizeof(struct ipc_namespace), GFP_KERNEL);
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if (ns == NULL)
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goto err_mem;
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err = sem_init_ns(ns);
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if (err)
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goto err_sem;
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err = msg_init_ns(ns);
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if (err)
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goto err_msg;
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err = shm_init_ns(ns);
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if (err)
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goto err_shm;
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kref_init(&ns->kref);
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return ns;
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err_shm:
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msg_exit_ns(ns);
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err_msg:
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sem_exit_ns(ns);
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err_sem:
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kfree(ns);
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err_mem:
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return ERR_PTR(err);
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}
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struct ipc_namespace *copy_ipcs(unsigned long flags, struct ipc_namespace *ns)
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{
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struct ipc_namespace *new_ns;
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BUG_ON(!ns);
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get_ipc_ns(ns);
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if (!(flags & CLONE_NEWIPC))
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return ns;
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new_ns = clone_ipc_ns(ns);
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put_ipc_ns(ns);
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return new_ns;
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}
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void free_ipc_ns(struct kref *kref)
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{
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struct ipc_namespace *ns;
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ns = container_of(kref, struct ipc_namespace, kref);
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sem_exit_ns(ns);
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msg_exit_ns(ns);
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shm_exit_ns(ns);
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kfree(ns);
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}
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