Linux kernel mirror (for testing)
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linux
1/*
2 * Security server interface.
3 *
4 * Author : Stephen Smalley, <sds@epoch.ncsc.mil>
5 *
6 */
7
8#ifndef _SELINUX_SECURITY_H_
9#define _SELINUX_SECURITY_H_
10
11#include <linux/dcache.h>
12#include <linux/magic.h>
13#include <linux/types.h>
14#include "flask.h"
15
16#define SECSID_NULL 0x00000000 /* unspecified SID */
17#define SECSID_WILD 0xffffffff /* wildcard SID */
18#define SECCLASS_NULL 0x0000 /* no class */
19
20/* Identify specific policy version changes */
21#define POLICYDB_VERSION_BASE 15
22#define POLICYDB_VERSION_BOOL 16
23#define POLICYDB_VERSION_IPV6 17
24#define POLICYDB_VERSION_NLCLASS 18
25#define POLICYDB_VERSION_VALIDATETRANS 19
26#define POLICYDB_VERSION_MLS 19
27#define POLICYDB_VERSION_AVTAB 20
28#define POLICYDB_VERSION_RANGETRANS 21
29#define POLICYDB_VERSION_POLCAP 22
30#define POLICYDB_VERSION_PERMISSIVE 23
31#define POLICYDB_VERSION_BOUNDARY 24
32#define POLICYDB_VERSION_FILENAME_TRANS 25
33#define POLICYDB_VERSION_ROLETRANS 26
34#define POLICYDB_VERSION_NEW_OBJECT_DEFAULTS 27
35#define POLICYDB_VERSION_DEFAULT_TYPE 28
36
37/* Range of policy versions we understand*/
38#define POLICYDB_VERSION_MIN POLICYDB_VERSION_BASE
39#ifdef CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX
40#define POLICYDB_VERSION_MAX CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE
41#else
42#define POLICYDB_VERSION_MAX POLICYDB_VERSION_DEFAULT_TYPE
43#endif
44
45/* Mask for just the mount related flags */
46#define SE_MNTMASK 0x0f
47/* Super block security struct flags for mount options */
48#define CONTEXT_MNT 0x01
49#define FSCONTEXT_MNT 0x02
50#define ROOTCONTEXT_MNT 0x04
51#define DEFCONTEXT_MNT 0x08
52/* Non-mount related flags */
53#define SE_SBINITIALIZED 0x10
54#define SE_SBPROC 0x20
55#define SE_SBLABELSUPP 0x40
56
57#define CONTEXT_STR "context="
58#define FSCONTEXT_STR "fscontext="
59#define ROOTCONTEXT_STR "rootcontext="
60#define DEFCONTEXT_STR "defcontext="
61#define LABELSUPP_STR "seclabel"
62
63struct netlbl_lsm_secattr;
64
65extern int selinux_enabled;
66
67/* Policy capabilities */
68enum {
69 POLICYDB_CAPABILITY_NETPEER,
70 POLICYDB_CAPABILITY_OPENPERM,
71 __POLICYDB_CAPABILITY_MAX
72};
73#define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1)
74
75extern int selinux_policycap_netpeer;
76extern int selinux_policycap_openperm;
77
78/*
79 * type_datum properties
80 * available at the kernel policy version >= POLICYDB_VERSION_BOUNDARY
81 */
82#define TYPEDATUM_PROPERTY_PRIMARY 0x0001
83#define TYPEDATUM_PROPERTY_ATTRIBUTE 0x0002
84
85/* limitation of boundary depth */
86#define POLICYDB_BOUNDS_MAXDEPTH 4
87
88int security_mls_enabled(void);
89
90int security_load_policy(void *data, size_t len);
91int security_read_policy(void **data, size_t *len);
92size_t security_policydb_len(void);
93
94int security_policycap_supported(unsigned int req_cap);
95
96#define SEL_VEC_MAX 32
97struct av_decision {
98 u32 allowed;
99 u32 auditallow;
100 u32 auditdeny;
101 u32 seqno;
102 u32 flags;
103};
104
105/* definitions of av_decision.flags */
106#define AVD_FLAGS_PERMISSIVE 0x0001
107
108void security_compute_av(u32 ssid, u32 tsid,
109 u16 tclass, struct av_decision *avd);
110
111void security_compute_av_user(u32 ssid, u32 tsid,
112 u16 tclass, struct av_decision *avd);
113
114int security_transition_sid(u32 ssid, u32 tsid, u16 tclass,
115 const struct qstr *qstr, u32 *out_sid);
116
117int security_transition_sid_user(u32 ssid, u32 tsid, u16 tclass,
118 const char *objname, u32 *out_sid);
119
120int security_member_sid(u32 ssid, u32 tsid,
121 u16 tclass, u32 *out_sid);
122
123int security_change_sid(u32 ssid, u32 tsid,
124 u16 tclass, u32 *out_sid);
125
126int security_sid_to_context(u32 sid, char **scontext,
127 u32 *scontext_len);
128
129int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len);
130
131int security_context_to_sid(const char *scontext, u32 scontext_len,
132 u32 *out_sid);
133
134int security_context_to_sid_default(const char *scontext, u32 scontext_len,
135 u32 *out_sid, u32 def_sid, gfp_t gfp_flags);
136
137int security_context_to_sid_force(const char *scontext, u32 scontext_len,
138 u32 *sid);
139
140int security_get_user_sids(u32 callsid, char *username,
141 u32 **sids, u32 *nel);
142
143int security_port_sid(u8 protocol, u16 port, u32 *out_sid);
144
145int security_netif_sid(char *name, u32 *if_sid);
146
147int security_node_sid(u16 domain, void *addr, u32 addrlen,
148 u32 *out_sid);
149
150int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid,
151 u16 tclass);
152
153int security_bounded_transition(u32 oldsid, u32 newsid);
154
155int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid);
156
157int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type,
158 u32 xfrm_sid,
159 u32 *peer_sid);
160
161int security_get_classes(char ***classes, int *nclasses);
162int security_get_permissions(char *class, char ***perms, int *nperms);
163int security_get_reject_unknown(void);
164int security_get_allow_unknown(void);
165
166#define SECURITY_FS_USE_XATTR 1 /* use xattr */
167#define SECURITY_FS_USE_TRANS 2 /* use transition SIDs, e.g. devpts/tmpfs */
168#define SECURITY_FS_USE_TASK 3 /* use task SIDs, e.g. pipefs/sockfs */
169#define SECURITY_FS_USE_GENFS 4 /* use the genfs support */
170#define SECURITY_FS_USE_NONE 5 /* no labeling support */
171#define SECURITY_FS_USE_MNTPOINT 6 /* use mountpoint labeling */
172
173int security_fs_use(const char *fstype, unsigned int *behavior,
174 u32 *sid);
175
176int security_genfs_sid(const char *fstype, char *name, u16 sclass,
177 u32 *sid);
178
179#ifdef CONFIG_NETLABEL
180int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr,
181 u32 *sid);
182
183int security_netlbl_sid_to_secattr(u32 sid,
184 struct netlbl_lsm_secattr *secattr);
185#else
186static inline int security_netlbl_secattr_to_sid(
187 struct netlbl_lsm_secattr *secattr,
188 u32 *sid)
189{
190 return -EIDRM;
191}
192
193static inline int security_netlbl_sid_to_secattr(u32 sid,
194 struct netlbl_lsm_secattr *secattr)
195{
196 return -ENOENT;
197}
198#endif /* CONFIG_NETLABEL */
199
200const char *security_get_initial_sid_context(u32 sid);
201
202/*
203 * status notifier using mmap interface
204 */
205extern struct page *selinux_kernel_status_page(void);
206
207#define SELINUX_KERNEL_STATUS_VERSION 1
208struct selinux_kernel_status {
209 u32 version; /* version number of thie structure */
210 u32 sequence; /* sequence number of seqlock logic */
211 u32 enforcing; /* current setting of enforcing mode */
212 u32 policyload; /* times of policy reloaded */
213 u32 deny_unknown; /* current setting of deny_unknown */
214 /*
215 * The version > 0 supports above members.
216 */
217} __attribute__((packed));
218
219extern void selinux_status_update_setenforce(int enforcing);
220extern void selinux_status_update_policyload(int seqno);
221extern void selinux_complete_init(void);
222extern int selinux_disable(void);
223extern void exit_sel_fs(void);
224extern struct path selinux_null;
225extern struct vfsmount *selinuxfs_mount;
226extern void selnl_notify_setenforce(int val);
227extern void selnl_notify_policyload(u32 seqno);
228extern int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm);
229
230#endif /* _SELINUX_SECURITY_H_ */
231