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126 lines
3.5 KiB
C
126 lines
3.5 KiB
C
/**
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* @file
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*
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* @ingroup rtems_bsd_rtems
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*
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* @brief This object is an minimal RTEMS implementation of kern_jail.c.
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*/
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/*
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* Copyright (c) 2009, 2019 embedded brains GmbH. All rights reserved.
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*
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* embedded brains GmbH
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* Dornierstr. 4.
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* 82178 Puchheim
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* Germany
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* <rtems@embedded-brains.de>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <machine/rtems-bsd-kernel-space.h>
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/errno.h>
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#include <sys/sysproto.h>
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#include <sys/malloc.h>
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#include <sys/osd.h>
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#include <sys/priv.h>
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#include <sys/proc.h>
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#include <sys/taskqueue.h>
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#include <sys/fcntl.h>
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#include <sys/jail.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/sx.h>
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#include <sys/sysent.h>
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#include <sys/namei.h>
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#include <sys/mount.h>
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#include <sys/queue.h>
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#include <sys/socket.h>
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#include <sys/syscallsubr.h>
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#include <sys/sysctl.h>
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#include <rtems/score/threadqimpl.h>
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#define DEFAULT_HOSTUUID "00000000-0000-0000-0000-000000000000"
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/* Keep struct prison prison0 and some code in kern_jail_set() readable. */
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#ifdef INET
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#ifdef INET6
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#define _PR_IP_SADDRSEL PR_IP4_SADDRSEL|PR_IP6_SADDRSEL
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#else
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#define _PR_IP_SADDRSEL PR_IP4_SADDRSEL
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#endif
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#else /* !INET */
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#ifdef INET6
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#define _PR_IP_SADDRSEL PR_IP6_SADDRSEL
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#else
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#define _PR_IP_SADDRSEL 0
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#endif
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#endif
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/* prison0 describes what is "real" about the system. */
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struct prison prison0 = {
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.pr_id = 0,
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.pr_name = "0",
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.pr_ref = 1,
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.pr_uref = 1,
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.pr_path = "/",
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.pr_securelevel = -1,
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.pr_childmax = JAIL_MAX,
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/*
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* Statically initialize this mutex to allow a garbage collection of this
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* structure.
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*/
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.pr_mtx = {
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.lock_object = { .lo_flags = LO_INITIALIZED },
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.mutex = {
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.queue = THREAD_QUEUE_INITIALIZER("jail mutex"),
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.nest_level = 0
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}
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},
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.pr_hostuuid = DEFAULT_HOSTUUID,
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.pr_children = LIST_HEAD_INITIALIZER(prison0.pr_children),
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#ifdef VIMAGE
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.pr_flags = PR_HOST|PR_VNET|_PR_IP_SADDRSEL,
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#else
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.pr_flags = PR_HOST|_PR_IP_SADDRSEL,
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#endif
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.pr_allow = PR_ALLOW_ALL_STATIC
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};
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void
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getcredhostuuid(struct ucred *cred, char *buf, size_t size)
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{
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(void)cred;
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mtx_lock(&prison0.pr_mtx);
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strlcpy(buf, prison0.pr_hostuuid, size);
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mtx_unlock(&prison0.pr_mtx);
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}
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