2 * acm.h: Xen access control module interface defintions
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to
6 * deal in the Software without restriction, including without limitation the
7 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
8 * sell copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
19 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
20 * DEALINGS IN THE SOFTWARE.
22 * Reiner Sailer <sailer@watson.ibm.com>
23 * Copyright (c) 2005, International Business Machines Corporation.
26 #ifndef _XEN_PUBLIC_ACM_H
27 #define _XEN_PUBLIC_ACM_H
31 /* default ssid reference value if not supplied */
32 #define ACM_DEFAULT_SSID 0x0
33 #define ACM_DEFAULT_LOCAL_SSID 0x0
35 /* Internal ACM ERROR types */
38 #define ACM_INIT_SSID_ERROR -2
39 #define ACM_INIT_SOID_ERROR -3
42 /* External ACCESS DECISIONS */
43 #define ACM_ACCESS_PERMITTED 0
44 #define ACM_ACCESS_DENIED -111
45 #define ACM_NULL_POINTER_ERROR -200
48 Error codes reported in when trying to test for a new policy
49 These error codes are reported in an array of tuples where
50 each error code is followed by a parameter describing the error
51 more closely, such as a domain id.
53 #define ACM_EVTCHN_SHARING_VIOLATION 0x100
54 #define ACM_GNTTAB_SHARING_VIOLATION 0x101
55 #define ACM_DOMAIN_LOOKUP 0x102
56 #define ACM_CHWALL_CONFLICT 0x103
57 #define ACM_SSIDREF_IN_USE 0x104
60 /* primary policy in lower 4 bits */
61 #define ACM_NULL_POLICY 0
62 #define ACM_CHINESE_WALL_POLICY 1
63 #define ACM_SIMPLE_TYPE_ENFORCEMENT_POLICY 2
64 #define ACM_POLICY_UNDEFINED 15
66 /* combinations have secondary policy component in higher 4bit */
67 #define ACM_CHINESE_WALL_AND_SIMPLE_TYPE_ENFORCEMENT_POLICY \
68 ((ACM_SIMPLE_TYPE_ENFORCEMENT_POLICY << 4) | ACM_CHINESE_WALL_POLICY)
71 #define ACM_POLICY_NAME(X) \
72 ((X) == (ACM_NULL_POLICY)) ? "NULL" : \
73 ((X) == (ACM_CHINESE_WALL_POLICY)) ? "CHINESE WALL" : \
74 ((X) == (ACM_SIMPLE_TYPE_ENFORCEMENT_POLICY)) ? "SIMPLE TYPE ENFORCEMENT" : \
75 ((X) == (ACM_CHINESE_WALL_AND_SIMPLE_TYPE_ENFORCEMENT_POLICY)) ? "CHINESE WALL AND SIMPLE TYPE ENFORCEMENT" : \
78 /* the following policy versions must be increased
79 * whenever the interpretation of the related
80 * policy's data structure changes
82 #define ACM_POLICY_VERSION 4
83 #define ACM_CHWALL_VERSION 1
84 #define ACM_STE_VERSION 1
86 /* defines a ssid reference used by xen */
87 typedef uint32_t ssidref_t;
89 /* hooks that are known to domains */
90 #define ACMHOOK_none 0
91 #define ACMHOOK_sharing 1
92 #define ACMHOOK_authorization 2
93 #define ACMHOOK_conflictset 3
95 /* -------security policy relevant type definitions-------- */
97 /* type identifier; compares to "equal" or "not equal" */
98 typedef uint16_t domaintype_t;
100 /* CHINESE WALL POLICY DATA STRUCTURES
102 * current accumulated conflict type set:
103 * When a domain is started and has a type that is in
104 * a conflict set, the conflicting types are incremented in
105 * the aggregate set. When a domain is destroyed, the
106 * conflicting types to its type are decremented.
107 * If a domain has multiple types, this procedure works over
110 * conflict_aggregate_set[i] holds the number of
111 * running domains that have a conflict with type i.
113 * running_types[i] holds the number of running domains
114 * that include type i in their ssidref-referenced type set
116 * conflict_sets[i][j] is "0" if type j has no conflict
117 * with type i and is "1" otherwise.
119 /* high-16 = version, low-16 = check magic */
120 #define ACM_MAGIC 0x0001debc
122 /* size of the SHA1 hash identifying the XML policy from which the
123 binary policy was created */
124 #define ACM_SHA1_HASH_SIZE 20
126 /* each offset in bytes from start of the struct they
129 /* V3 of the policy buffer aded a version structure */
130 struct acm_policy_version
137 /* each buffer consists of all policy information for
138 * the respective policy given in the policy code
140 * acm_policy_buffer, acm_chwall_policy_buffer,
141 * and acm_ste_policy_buffer need to stay 32-bit aligned
142 * because we create binary policies also with external
143 * tools that assume packed representations (e.g. the java tool)
145 struct acm_policy_buffer {
147 uint32_t policy_version; /* ACM_POLICY_VERSION */
149 uint32_t policy_reference_offset;
150 uint32_t primary_policy_code;
151 uint32_t primary_buffer_offset;
152 uint32_t secondary_policy_code;
153 uint32_t secondary_buffer_offset;
154 struct acm_policy_version xml_pol_version; /* add in V3 */
155 uint8_t xml_policy_hash[ACM_SHA1_HASH_SIZE]; /* added in V4 */
159 struct acm_policy_reference_buffer {
163 struct acm_chwall_policy_buffer {
164 uint32_t policy_version; /* ACM_CHWALL_VERSION */
165 uint32_t policy_code;
166 uint32_t chwall_max_types;
167 uint32_t chwall_max_ssidrefs;
168 uint32_t chwall_max_conflictsets;
169 uint32_t chwall_ssid_offset;
170 uint32_t chwall_conflict_sets_offset;
171 uint32_t chwall_running_types_offset;
172 uint32_t chwall_conflict_aggregate_offset;
175 struct acm_ste_policy_buffer {
176 uint32_t policy_version; /* ACM_STE_VERSION */
177 uint32_t policy_code;
178 uint32_t ste_max_types;
179 uint32_t ste_max_ssidrefs;
180 uint32_t ste_ssid_offset;
183 struct acm_stats_buffer {
186 uint32_t primary_policy_code;
187 uint32_t primary_stats_offset;
188 uint32_t secondary_policy_code;
189 uint32_t secondary_stats_offset;
192 struct acm_ste_stats_buffer {
193 uint32_t ec_eval_count;
194 uint32_t gt_eval_count;
195 uint32_t ec_denied_count;
196 uint32_t gt_denied_count;
197 uint32_t ec_cachehit_count;
198 uint32_t gt_cachehit_count;
201 struct acm_ssid_buffer {
204 uint32_t policy_reference_offset;
205 uint32_t primary_policy_code;
206 uint32_t primary_max_types;
207 uint32_t primary_types_offset;
208 uint32_t secondary_policy_code;
209 uint32_t secondary_max_types;
210 uint32_t secondary_types_offset;
221 * indent-tabs-mode: nil