FreeBSD/Linux Kernel Cross Reference
sys/security/mac_sysv_sem.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) 2003-2004 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/sbuf.h>
    #include <sys/systm.h>
    #include <sys/vnode.h>
    #include <sys/mount.h>
    #include <sys/file.h>
    #include <sys/namei.h>
    #include <sys/sysctl.h>
    #include <sys/sem.h>
    #include <sys/sem_internal.h>
    
    #include <security/mac_internal.h>
    
    
    static struct label *
    mac_sysv_sem_label_alloc(void)
    {
            struct label *label;
    
            label = mac_labelzone_alloc(MAC_WAITOK);
            if (label == NULL)
                    return (NULL);
            MAC_PERFORM(sysvsem_label_init, label);
            return (label);
    }
    
    void
    mac_sysvsem_label_init(struct semid_kernel *semakptr)
    {
    
            semakptr->label = mac_sysv_sem_label_alloc();
    }
    
    static void
    mac_sysv_sem_label_free(struct label *label)
    {
   
           MAC_PERFORM(sysvsem_label_destroy, label);
           mac_labelzone_free(label);
   }
   
   void
   mac_sysvsem_label_destroy(struct semid_kernel *semakptr)
   {
   
           mac_sysv_sem_label_free(semakptr->label);
           semakptr->label = NULL;
   }
   
   void
   mac_sysvsem_label_associate(kauth_cred_t cred, struct semid_kernel *semakptr)
   {
   
           MAC_PERFORM(sysvsem_label_associate, cred, semakptr, semakptr->label);
   }
   
   void
   mac_sysvsem_label_recycle(struct semid_kernel *semakptr)
   {
   
           MAC_PERFORM(sysvsem_label_recycle, semakptr->label);
   }
   
   int
   mac_sysvsem_check_semctl(kauth_cred_t cred, struct semid_kernel *semakptr,
       int cmd)
   {
           int error;
   
           if (!mac_sysvsem_enforce)
                   return (0);
   
           MAC_CHECK(sysvsem_check_semctl, cred, semakptr, semakptr->label, cmd);
   
           return(error);
   }
   
   int
   mac_sysvsem_check_semget(kauth_cred_t cred, struct semid_kernel *semakptr)
   {
           int error;
   
           if (!mac_sysvsem_enforce)
                   return (0);
   
           MAC_CHECK(sysvsem_check_semget, cred, semakptr, semakptr->label);
   
           return(error);
   }
   
   int
   mac_sysvsem_check_semop(kauth_cred_t cred, struct semid_kernel *semakptr,
       size_t accesstype)
   {
           int error;
   
           if (!mac_sysvsem_enforce)
                   return (0);
   
           MAC_CHECK(sysvsem_check_semop, cred, semakptr, semakptr->label,
               accesstype);
   
           return(error);
   }

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