FreeBSD/Linux Kernel Cross Reference
sys/security/mac_posix_shm.c

     /*
      * Copyright (c) 2007 Apple Inc. All rights reserved.
      *
      * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
      * 
      * This file contains Original Code and/or Modifications of Original Code
      * as defined in and that are subject to the Apple Public Source License
      * Version 2.0 (the 'License'). You may not use this file except in
      * compliance with the License. The rights granted to you under the License
     * may not be used to create, or enable the creation or redistribution of,
     * unlawful or unlicensed copies of an Apple operating system, or to
     * circumvent, violate, or enable the circumvention or violation of, any
     * terms of an Apple operating system software license agreement.
     * 
     * Please obtain a copy of the License at
     * http://www.opensource.apple.com/apsl/ and read it before using this file.
     * 
     * The Original Code and all software distributed under the License are
     * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
     * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
     * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
     * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
     * Please see the License for the specific language governing rights and
     * limitations under the License.
     * 
     * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
     */
    /*-
     * Copyright (c) 2003-2005 Networks Associates Technology, Inc.
     * All rights reserved.
     *
     * This software was developed for the FreeBSD Project in part by Network
     * Associates Laboratories, the Security Research Division of Network
     * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
     * as part of the DARPA CHATS research program.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     */
    
    #include <sys/cdefs.h>
    
    #include <sys/param.h>
    #include <sys/kernel.h>
    #include <sys/lock.h>
    #include <sys/malloc.h>
    #include <sys/posix_shm.h>
    #include <sys/sbuf.h>
    #include <sys/systm.h>
    #include <sys/sysctl.h>
    #include <sys/vnode.h>
    
    #include <security/mac_internal.h>
    
    static struct label *
    mac_posixshm_label_alloc(void)
    {
            struct label *label;
    
            label = mac_labelzone_alloc(MAC_WAITOK);
            if (label == NULL)
                    return (NULL);
            MAC_PERFORM(posixshm_label_init, label);
            return (label);
    }
    
    void
    mac_posixshm_label_init(struct pshminfo *pshm)
    {
    
            pshm->pshm_label = mac_posixshm_label_alloc();
    }
    
    static void
    mac_posixshm_label_free(struct label *label)
    {
    
            MAC_PERFORM(posixshm_label_destroy, label);
            mac_labelzone_free(label);
    }
    
   void
   mac_posixshm_label_destroy(struct pshminfo *pshm)
   {
   
           mac_posixshm_label_free(pshm->pshm_label);
           pshm->pshm_label = NULL;
   }
   
   void
   mac_posixshm_vnode_label_associate(kauth_cred_t cred,
           struct pshminfo *pshm, struct label *plabel,
           vnode_t vp, struct label *vlabel)
   {
           MAC_PERFORM(vnode_label_associate_posixshm, cred, 
                       pshm, plabel, vp, vlabel);
   }
   
   void
   mac_posixshm_label_associate(kauth_cred_t cred, struct pshminfo *pshm,
       const char *name)
   {
   
           MAC_PERFORM(posixshm_label_associate, cred, pshm, pshm->pshm_label, name);
   }
   
   int
   mac_posixshm_check_create(kauth_cred_t cred, const char *name)
   {
           int error = 0;
   
           if (!mac_posixshm_enforce)
                   return 0;
   
           MAC_CHECK(posixshm_check_create, cred, name);
   
           return error;
   }
   
   int
   mac_posixshm_check_open(kauth_cred_t cred, struct pshminfo *shm)
   {
           int error = 0;
   
           if (!mac_posixshm_enforce)
                   return 0;
   
           MAC_CHECK(posixshm_check_open, cred, shm, shm->pshm_label);
   
           return (error);
   }
   
   int
   mac_posixshm_check_mmap(kauth_cred_t cred, struct pshminfo *shm,
       int prot, int flags)
   {
           int error = 0;
   
           if (!mac_posixshm_enforce)
                   return 0;
   
           MAC_CHECK(posixshm_check_mmap, cred, shm, shm->pshm_label,
               prot, flags);
   
           return (error);
   }
   
   int
   mac_posixshm_check_stat(kauth_cred_t cred, struct pshminfo *shm)
   {
           int error = 0;
   
           if (!mac_posixshm_enforce)
                   return 0;
   
           MAC_CHECK(posixshm_check_stat, cred, shm, shm->pshm_label);
   
           return (error);
   }
   
   int
   mac_posixshm_check_truncate(kauth_cred_t cred, struct pshminfo *shm,
       size_t size)
   {
           int error = 0;
   
           if (!mac_posixshm_enforce)
                   return 0;
   
           MAC_CHECK(posixshm_check_truncate, cred, shm, shm->pshm_label, size);
   
           return (error);
   }
   
   int
   mac_posixshm_check_unlink(kauth_cred_t cred, struct pshminfo *shm,
       const char *name)
   {
           int error = 0;
   
           if (!mac_posixshm_enforce)
                   return 0;
   
           MAC_CHECK(posixshm_check_unlink, cred, shm, shm->pshm_label, name);
   
           return (error);
   }

Cache object: 5152bc8f61ce39fe2befc81159d3a68e