1/*
2 * Copyright (c) 2013 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#ifndef _SYS_PROC_UUID_POLICY_H
30#define _SYS_PROC_UUID_POLICY_H
31
32#include <sys/cdefs.h>
33#include <sys/param.h>
34#include <sys/types.h>
35#include <stdint.h>
36#include <uuid/uuid.h>
37
38__BEGIN_DECLS
39
40/*
41 * The proc_uuid_policy subsystem allows a privileged client to
42 * upload policies to the kernel keyed by Mach-O executable
43 * UUID. In-kernel clients can query this policy table cheaply
44 * to determine if a resource or process should by governed
45 * by the policy flags. During early boot, the policy table
46 * may be empty or sparse, which in-kernel clients should
47 * have a specified behavior for.
48 */
49
50#define PROC_UUID_POLICY_OPERATION_CLEAR	0x00000000
51#define PROC_UUID_POLICY_OPERATION_ADD		0x00000001
52#define PROC_UUID_POLICY_OPERATION_REMOVE	0x00000002
53
54/* The namespace of flags are managed by in-kernel clients */
55#define PROC_UUID_POLICY_FLAGS_NONE			0x00000000
56#define	PROC_UUID_NO_CELLULAR				0x00000001
57#define	PROC_UUID_FLOW_DIVERT				0x00000002
58
59#if BSD_KERNEL_PRIVATE
60/*
61 * Look up a policy indexed by UUID.
62 *
63 * Paramaters:
64 *     uuid          UUID to look up, must be not the zero-uuid
65 *     flags         Flags that have been associated with the UUID on successful
66 *                   lookup.
67 *     gencount      The generation count of the internal policy table representation.
68 *
69 *     Initial lookups by an in-kernel subsystem should pass 0 for flags/gencount.
70 *     Subsequent lookups for the same UUID with the same flags and gencount passed
71 *     in can short-circuit the lookup if the generation count has not changed.
72 *
73 * Return:
74 *     0        Success, UUID was found, flags and gencount are returned
75 *     EINVAL   Bad UUID or other pointer parameter
76 *     ENOENT   UUID not found
77 *
78 */
79extern int proc_uuid_policy_lookup(uuid_t uuid, uint32_t *flags, int32_t *gencount);
80
81extern void proc_uuid_policy_init(void);
82#endif /* BSD_KERNEL_PRIVATE */
83
84#ifndef KERNEL
85/*
86 * Upload a policy indexed by UUID.
87 *
88 * Parameters:
89 *     operation     CLEAR    Remove all existing entries
90 *                   ADD      Add the specified UUID and flags to the policy table.
91 *                            Existing entries for the UUID are replaced.
92 *                   REMOVE   Remove entry for the specified UUID.
93 *     uuid          Pointer to UUID for Mach-O executable
94 *     uuidlen       sizeof(uuid_t)
95 *     flags         Flags to be stored in the policy table
96 *
97 * Return:
98 *     0        Success, operation completed without error.
99 *     -1       Failure, errno can contain:
100 *         ENOENT   REMOVE operation specified a UUID not in the policy table.
101 *         EPERM    Call is not privileged to call this system call
102 *         EINVAL   Invalid parameter
103 *         ERANGE   Invalid uuidlen
104 *         ENOMEM   Too many entries exist
105 */
106extern int proc_uuid_policy(uint32_t operation, uuid_t uuid, size_t uuidlen, uint32_t flags);
107#endif /* !KERNEL */
108
109__END_DECLS
110
111#endif /*_SYS_PROC_UUID_POLICY_H */
112