| | 1 | /* |
| | 2 | * Copyright (c) 2007 Apple Inc. All rights reserved. |
| | 3 | * |
| | 4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
| | 5 | * |
| | 6 | * This file contains Original Code and/or Modifications of Original Code |
| | 7 | * as defined in and that are subject to the Apple Public Source License |
| | 8 | * Version 2.0 (the 'License'). You may not use this file except in |
| | 9 | * compliance with the License. The rights granted to you under the License |
| | 10 | * may not be used to create, or enable the creation or redistribution of, |
| | 11 | * unlawful or unlicensed copies of an Apple operating system, or to |
| | 12 | * circumvent, violate, or enable the circumvention or violation of, any |
| | 13 | * terms of an Apple operating system software license agreement. |
| | 14 | * |
| | 15 | * Please obtain a copy of the License at |
| | 16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. |
| | 17 | * |
| | 18 | * The Original Code and all software distributed under the License are |
| | 19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| | 20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| | 21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| | 22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
| | 23 | * Please see the License for the specific language governing rights and |
| | 24 | * limitations under the License. |
| | 25 | * |
| | 26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
| | 27 | */ |
| | 28 | /*- |
| | 29 | * Copyright (c) 2005-2006 SPARTA, Inc. |
| | 30 | * All rights reserved. |
| | 31 | * |
| | 32 | * Redistribution and use in source and binary forms, with or without |
| | 33 | * modification, are permitted provided that the following conditions |
| | 34 | * are met: |
| | 35 | * 1. Redistributions of source code must retain the above copyright |
| | 36 | * notice, this list of conditions and the following disclaimer. |
| | 37 | * 2. Redistributions in binary form must reproduce the above copyright |
| | 38 | * notice, this list of conditions and the following disclaimer in the |
| | 39 | * documentation and/or other materials provided with the distribution. |
| | 40 | * |
| | 41 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| | 42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| | 43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| | 44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| | 45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| | 46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| | 47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| | 48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| | 49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| | 50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| | 51 | * SUCH DAMAGE. |
| | 52 | */ |
| | 53 | |
| | 54 | #ifndef _IPC_LABELH_H_ |
| | 55 | #define _IPC_LABELH_H_ |
| | 56 | |
| | 57 | #include <kern/lock.h> |
| | 58 | #include <ipc/ipc_port.h> |
| | 59 | #include <security/_label.h> |
| | 60 | |
| | 61 | #if CONFIG_MACF_MACH |
| | 62 | typedef struct ipc_labelh |
| | 63 | { |
| | 64 | natural_t lh_references; |
| | 65 | int lh_type; |
| | 66 | struct label lh_label; |
| | 67 | ipc_port_t lh_port; |
| | 68 | decl_lck_mtx_data(, lh_lock_data) |
| | 69 | } *ipc_labelh_t; |
| | 70 | |
| | 71 | #define LABELH_TYPE_KERN 0 |
| | 72 | #define LABELH_TYPE_USER 1 |
| | 73 | |
| | 74 | void labelh_destroy(ipc_port_t port); |
| | 75 | ipc_labelh_t labelh_duplicate(ipc_labelh_t old); |
| | 76 | ipc_labelh_t labelh_modify(ipc_labelh_t old); |
| | 77 | ipc_labelh_t labelh_new(int canblock); |
| | 78 | kern_return_t labelh_new_user(ipc_space_t, struct label *, mach_port_name_t *); |
| | 79 | void labelh_release(ipc_labelh_t lh); |
| | 80 | ipc_labelh_t labelh_reference(ipc_labelh_t lh); |
| | 81 | |
| | 82 | #define lh_reference(lh) ((lh)->lh_references++) |
| | 83 | #define lh_release(lh) \ |
| | 84 | MACRO_BEGIN \ |
| | 85 | assert((lh)->lh_references > 0); \ |
| | 86 | (lh)->lh_references--; \ |
| | 87 | MACRO_END |
| | 88 | |
| | 89 | extern zone_t ipc_labelh_zone; |
| | 90 | |
| | 91 | #define lh_lock_init(lh) lck_mtx_init(&(lh)->lh_lock_data, &ipc_lck_grp, &ipc_lck_attr) |
| | 92 | #define lh_lock_destroy(lh) lck_mtx_destroy(&(lh)->lh_lock_data, &ipc_lck_grp) |
| | 93 | #define lh_lock(lh) lck_mtx_lock(&(lh)->lh_lock_data) |
| | 94 | #define lh_unlock(lh) lck_mtx_unlock(&(lh)->lh_lock_data) |
| | 95 | |
| | 96 | /* |
| | 97 | * Check the number of references the label handle has left. |
| | 98 | * If there are 0 references and this is a kernel-allocated |
| | 99 | * label handle, deallocate the associated port. The |
| | 100 | * storage space for the label handle will be deallocated |
| | 101 | * as part of the port destruction. User-allocated label |
| | 102 | * handles are destroyed along with their ports. |
| | 103 | */ |
| | 104 | #define lh_check_unlock(lh) \ |
| | 105 | MACRO_BEGIN \ |
| | 106 | _VOLATILE_ natural_t _refs = (lh)->lh_references; \ |
| | 107 | \ |
| | 108 | lh_unlock(lh); \ |
| | 109 | if (_refs == 0 && (lh)->lh_type == LABELH_TYPE_KERN) \ |
| | 110 | ipc_port_dealloc_kernel((lh)->lh_port); \ |
| | 111 | MACRO_END |
| | 112 | |
| | 113 | #endif /* MAC_MACH */ |
| | 114 | #endif /* _IPC_LABELH_H_ */ |
projects / apple / xnu.git / blame_incremental