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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Security server interface.
4 *
5 * Author : Stephen Smalley, <sds@tycho.nsa.gov>
6 *
7 */
8
9#ifndef _SELINUX_SECURITY_H_
10#define _SELINUX_SECURITY_H_
11
12#include <linux/compiler.h>
13#include <linux/dcache.h>
14#include <linux/magic.h>
15#include <linux/types.h>
16#include <linux/rcupdate.h>
17#include <linux/refcount.h>
18#include <linux/workqueue.h>
19#include <linux/delay.h>
20#include <linux/printk.h>
21#include "flask.h"
22#include "policycap.h"
23
24#define SECSID_NULL 0x00000000 /* unspecified SID */
25#define SECSID_WILD 0xffffffff /* wildcard SID */
26#define SECCLASS_NULL 0x0000 /* no class */
27
28/* Identify specific policy version changes */
29#define POLICYDB_VERSION_BASE 15
30#define POLICYDB_VERSION_BOOL 16
31#define POLICYDB_VERSION_IPV6 17
32#define POLICYDB_VERSION_NLCLASS 18
33#define POLICYDB_VERSION_VALIDATETRANS 19
34#define POLICYDB_VERSION_MLS 19
35#define POLICYDB_VERSION_AVTAB 20
36#define POLICYDB_VERSION_RANGETRANS 21
37#define POLICYDB_VERSION_POLCAP 22
38#define POLICYDB_VERSION_PERMISSIVE 23
39#define POLICYDB_VERSION_BOUNDARY 24
40#define POLICYDB_VERSION_FILENAME_TRANS 25
41#define POLICYDB_VERSION_ROLETRANS 26
42#define POLICYDB_VERSION_NEW_OBJECT_DEFAULTS 27
43#define POLICYDB_VERSION_DEFAULT_TYPE 28
44#define POLICYDB_VERSION_CONSTRAINT_NAMES 29
45#define POLICYDB_VERSION_XPERMS_IOCTL 30
46#define POLICYDB_VERSION_INFINIBAND 31
47#define POLICYDB_VERSION_GLBLUB 32
48#define POLICYDB_VERSION_COMP_FTRANS 33 /* compressed filename transitions */
49
50/* Range of policy versions we understand*/
51#define POLICYDB_VERSION_MIN POLICYDB_VERSION_BASE
52#define POLICYDB_VERSION_MAX POLICYDB_VERSION_COMP_FTRANS
53
54/* Mask for just the mount related flags */
55#define SE_MNTMASK 0x0f
56/* Super block security struct flags for mount options */
57/* BE CAREFUL, these need to be the low order bits for selinux_get_mnt_opts */
58#define CONTEXT_MNT 0x01
59#define FSCONTEXT_MNT 0x02
60#define ROOTCONTEXT_MNT 0x04
61#define DEFCONTEXT_MNT 0x08
62#define SBLABEL_MNT 0x10
63/* Non-mount related flags */
64#define SE_SBINITIALIZED 0x0100
65#define SE_SBPROC 0x0200
66#define SE_SBGENFS 0x0400
67#define SE_SBGENFS_XATTR 0x0800
68
69#define CONTEXT_STR "context"
70#define FSCONTEXT_STR "fscontext"
71#define ROOTCONTEXT_STR "rootcontext"
72#define DEFCONTEXT_STR "defcontext"
73#define SECLABEL_STR "seclabel"
74
75struct netlbl_lsm_secattr;
76
77extern int selinux_enabled_boot;
78
79/*
80 * type_datum properties
81 * available at the kernel policy version >= POLICYDB_VERSION_BOUNDARY
82 */
83#define TYPEDATUM_PROPERTY_PRIMARY 0x0001
84#define TYPEDATUM_PROPERTY_ATTRIBUTE 0x0002
85
86/* limitation of boundary depth */
87#define POLICYDB_BOUNDS_MAXDEPTH 4
88
89struct selinux_avc;
90struct selinux_policy;
91
92struct selinux_state {
93#ifdef CONFIG_SECURITY_SELINUX_DISABLE
94 bool disabled;
95#endif
96#ifdef CONFIG_SECURITY_SELINUX_DEVELOP
97 bool enforcing;
98#endif
99 bool checkreqprot;
100 bool initialized;
101 bool policycap[__POLICYDB_CAP_MAX];
102
103 struct page *status_page;
104 struct mutex status_lock;
105
106 struct selinux_avc *avc;
107 struct selinux_policy __rcu *policy;
108 struct mutex policy_mutex;
109} __randomize_layout;
110
111void selinux_avc_init(struct selinux_avc **avc);
112
113extern struct selinux_state selinux_state;
114
115static inline bool selinux_initialized(const struct selinux_state *state)
116{
117 /* do a synchronized load to avoid race conditions */
118 return smp_load_acquire(&state->initialized);
119}
120
121static inline void selinux_mark_initialized(struct selinux_state *state)
122{
123 /* do a synchronized write to avoid race conditions */
124 smp_store_release(&state->initialized, true);
125}
126
127#ifdef CONFIG_SECURITY_SELINUX_DEVELOP
128static inline bool enforcing_enabled(struct selinux_state *state)
129{
130 return READ_ONCE(state->enforcing);
131}
132
133static inline void enforcing_set(struct selinux_state *state, bool value)
134{
135 WRITE_ONCE(state->enforcing, value);
136}
137#else
138static inline bool enforcing_enabled(struct selinux_state *state)
139{
140 return true;
141}
142
143static inline void enforcing_set(struct selinux_state *state, bool value)
144{
145}
146#endif
147
148static inline bool checkreqprot_get(const struct selinux_state *state)
149{
150 return READ_ONCE(state->checkreqprot);
151}
152
153static inline void checkreqprot_set(struct selinux_state *state, bool value)
154{
155 if (value)
156 pr_err("SELinux: https://github.com/SELinuxProject/selinux-kernel/wiki/DEPRECATE-checkreqprot\n");
157 WRITE_ONCE(state->checkreqprot, value);
158}
159
160#ifdef CONFIG_SECURITY_SELINUX_DISABLE
161static inline bool selinux_disabled(struct selinux_state *state)
162{
163 return READ_ONCE(state->disabled);
164}
165
166static inline void selinux_mark_disabled(struct selinux_state *state)
167{
168 WRITE_ONCE(state->disabled, true);
169}
170#else
171static inline bool selinux_disabled(struct selinux_state *state)
172{
173 return false;
174}
175#endif
176
177static inline bool selinux_policycap_netpeer(void)
178{
179 struct selinux_state *state = &selinux_state;
180
181 return READ_ONCE(state->policycap[POLICYDB_CAP_NETPEER]);
182}
183
184static inline bool selinux_policycap_openperm(void)
185{
186 struct selinux_state *state = &selinux_state;
187
188 return READ_ONCE(state->policycap[POLICYDB_CAP_OPENPERM]);
189}
190
191static inline bool selinux_policycap_extsockclass(void)
192{
193 struct selinux_state *state = &selinux_state;
194
195 return READ_ONCE(state->policycap[POLICYDB_CAP_EXTSOCKCLASS]);
196}
197
198static inline bool selinux_policycap_alwaysnetwork(void)
199{
200 struct selinux_state *state = &selinux_state;
201
202 return READ_ONCE(state->policycap[POLICYDB_CAP_ALWAYSNETWORK]);
203}
204
205static inline bool selinux_policycap_cgroupseclabel(void)
206{
207 struct selinux_state *state = &selinux_state;
208
209 return READ_ONCE(state->policycap[POLICYDB_CAP_CGROUPSECLABEL]);
210}
211
212static inline bool selinux_policycap_nnp_nosuid_transition(void)
213{
214 struct selinux_state *state = &selinux_state;
215
216 return READ_ONCE(state->policycap[POLICYDB_CAP_NNP_NOSUID_TRANSITION]);
217}
218
219static inline bool selinux_policycap_genfs_seclabel_symlinks(void)
220{
221 struct selinux_state *state = &selinux_state;
222
223 return READ_ONCE(state->policycap[POLICYDB_CAP_GENFS_SECLABEL_SYMLINKS]);
224}
225
226static inline bool selinux_policycap_ioctl_skip_cloexec(void)
227{
228 struct selinux_state *state = &selinux_state;
229
230 return READ_ONCE(state->policycap[POLICYDB_CAP_IOCTL_SKIP_CLOEXEC]);
231}
232
233struct selinux_policy_convert_data;
234
235struct selinux_load_state {
236 struct selinux_policy *policy;
237 struct selinux_policy_convert_data *convert_data;
238};
239
240int security_mls_enabled(struct selinux_state *state);
241int security_load_policy(struct selinux_state *state,
242 void *data, size_t len,
243 struct selinux_load_state *load_state);
244void selinux_policy_commit(struct selinux_state *state,
245 struct selinux_load_state *load_state);
246void selinux_policy_cancel(struct selinux_state *state,
247 struct selinux_load_state *load_state);
248int security_read_policy(struct selinux_state *state,
249 void **data, size_t *len);
250int security_read_state_kernel(struct selinux_state *state,
251 void **data, size_t *len);
252int security_policycap_supported(struct selinux_state *state,
253 unsigned int req_cap);
254
255#define SEL_VEC_MAX 32
256struct av_decision {
257 u32 allowed;
258 u32 auditallow;
259 u32 auditdeny;
260 u32 seqno;
261 u32 flags;
262};
263
264#define XPERMS_ALLOWED 1
265#define XPERMS_AUDITALLOW 2
266#define XPERMS_DONTAUDIT 4
267
268#define security_xperm_set(perms, x) ((perms)[(x) >> 5] |= 1 << ((x) & 0x1f))
269#define security_xperm_test(perms, x) (1 & ((perms)[(x) >> 5] >> ((x) & 0x1f)))
270struct extended_perms_data {
271 u32 p[8];
272};
273
274struct extended_perms_decision {
275 u8 used;
276 u8 driver;
277 struct extended_perms_data *allowed;
278 struct extended_perms_data *auditallow;
279 struct extended_perms_data *dontaudit;
280};
281
282struct extended_perms {
283 u16 len; /* length associated decision chain */
284 struct extended_perms_data drivers; /* flag drivers that are used */
285};
286
287/* definitions of av_decision.flags */
288#define AVD_FLAGS_PERMISSIVE 0x0001
289
290void security_compute_av(struct selinux_state *state,
291 u32 ssid, u32 tsid,
292 u16 tclass, struct av_decision *avd,
293 struct extended_perms *xperms);
294
295void security_compute_xperms_decision(struct selinux_state *state,
296 u32 ssid, u32 tsid, u16 tclass,
297 u8 driver,
298 struct extended_perms_decision *xpermd);
299
300void security_compute_av_user(struct selinux_state *state,
301 u32 ssid, u32 tsid,
302 u16 tclass, struct av_decision *avd);
303
304int security_transition_sid(struct selinux_state *state,
305 u32 ssid, u32 tsid, u16 tclass,
306 const struct qstr *qstr, u32 *out_sid);
307
308int security_transition_sid_user(struct selinux_state *state,
309 u32 ssid, u32 tsid, u16 tclass,
310 const char *objname, u32 *out_sid);
311
312int security_member_sid(struct selinux_state *state, u32 ssid, u32 tsid,
313 u16 tclass, u32 *out_sid);
314
315int security_change_sid(struct selinux_state *state, u32 ssid, u32 tsid,
316 u16 tclass, u32 *out_sid);
317
318int security_sid_to_context(struct selinux_state *state, u32 sid,
319 char **scontext, u32 *scontext_len);
320
321int security_sid_to_context_force(struct selinux_state *state,
322 u32 sid, char **scontext, u32 *scontext_len);
323
324int security_sid_to_context_inval(struct selinux_state *state,
325 u32 sid, char **scontext, u32 *scontext_len);
326
327int security_context_to_sid(struct selinux_state *state,
328 const char *scontext, u32 scontext_len,
329 u32 *out_sid, gfp_t gfp);
330
331int security_context_str_to_sid(struct selinux_state *state,
332 const char *scontext, u32 *out_sid, gfp_t gfp);
333
334int security_context_to_sid_default(struct selinux_state *state,
335 const char *scontext, u32 scontext_len,
336 u32 *out_sid, u32 def_sid, gfp_t gfp_flags);
337
338int security_context_to_sid_force(struct selinux_state *state,
339 const char *scontext, u32 scontext_len,
340 u32 *sid);
341
342int security_get_user_sids(struct selinux_state *state,
343 u32 callsid, char *username,
344 u32 **sids, u32 *nel);
345
346int security_port_sid(struct selinux_state *state,
347 u8 protocol, u16 port, u32 *out_sid);
348
349int security_ib_pkey_sid(struct selinux_state *state,
350 u64 subnet_prefix, u16 pkey_num, u32 *out_sid);
351
352int security_ib_endport_sid(struct selinux_state *state,
353 const char *dev_name, u8 port_num, u32 *out_sid);
354
355int security_netif_sid(struct selinux_state *state,
356 char *name, u32 *if_sid);
357
358int security_node_sid(struct selinux_state *state,
359 u16 domain, void *addr, u32 addrlen,
360 u32 *out_sid);
361
362int security_validate_transition(struct selinux_state *state,
363 u32 oldsid, u32 newsid, u32 tasksid,
364 u16 tclass);
365
366int security_validate_transition_user(struct selinux_state *state,
367 u32 oldsid, u32 newsid, u32 tasksid,
368 u16 tclass);
369
370int security_bounded_transition(struct selinux_state *state,
371 u32 oldsid, u32 newsid);
372
373int security_sid_mls_copy(struct selinux_state *state,
374 u32 sid, u32 mls_sid, u32 *new_sid);
375
376int security_net_peersid_resolve(struct selinux_state *state,
377 u32 nlbl_sid, u32 nlbl_type,
378 u32 xfrm_sid,
379 u32 *peer_sid);
380
381int security_get_classes(struct selinux_policy *policy,
382 char ***classes, int *nclasses);
383int security_get_permissions(struct selinux_policy *policy,
384 char *class, char ***perms, int *nperms);
385int security_get_reject_unknown(struct selinux_state *state);
386int security_get_allow_unknown(struct selinux_state *state);
387
388#define SECURITY_FS_USE_XATTR 1 /* use xattr */
389#define SECURITY_FS_USE_TRANS 2 /* use transition SIDs, e.g. devpts/tmpfs */
390#define SECURITY_FS_USE_TASK 3 /* use task SIDs, e.g. pipefs/sockfs */
391#define SECURITY_FS_USE_GENFS 4 /* use the genfs support */
392#define SECURITY_FS_USE_NONE 5 /* no labeling support */
393#define SECURITY_FS_USE_MNTPOINT 6 /* use mountpoint labeling */
394#define SECURITY_FS_USE_NATIVE 7 /* use native label support */
395#define SECURITY_FS_USE_MAX 7 /* Highest SECURITY_FS_USE_XXX */
396
397int security_fs_use(struct selinux_state *state, struct super_block *sb);
398
399int security_genfs_sid(struct selinux_state *state,
400 const char *fstype, const char *path, u16 sclass,
401 u32 *sid);
402
403int selinux_policy_genfs_sid(struct selinux_policy *policy,
404 const char *fstype, const char *path, u16 sclass,
405 u32 *sid);
406
407#ifdef CONFIG_NETLABEL
408int security_netlbl_secattr_to_sid(struct selinux_state *state,
409 struct netlbl_lsm_secattr *secattr,
410 u32 *sid);
411
412int security_netlbl_sid_to_secattr(struct selinux_state *state,
413 u32 sid,
414 struct netlbl_lsm_secattr *secattr);
415#else
416static inline int security_netlbl_secattr_to_sid(struct selinux_state *state,
417 struct netlbl_lsm_secattr *secattr,
418 u32 *sid)
419{
420 return -EIDRM;
421}
422
423static inline int security_netlbl_sid_to_secattr(struct selinux_state *state,
424 u32 sid,
425 struct netlbl_lsm_secattr *secattr)
426{
427 return -ENOENT;
428}
429#endif /* CONFIG_NETLABEL */
430
431const char *security_get_initial_sid_context(u32 sid);
432
433/*
434 * status notifier using mmap interface
435 */
436extern struct page *selinux_kernel_status_page(struct selinux_state *state);
437
438#define SELINUX_KERNEL_STATUS_VERSION 1
439struct selinux_kernel_status {
440 u32 version; /* version number of the structure */
441 u32 sequence; /* sequence number of seqlock logic */
442 u32 enforcing; /* current setting of enforcing mode */
443 u32 policyload; /* times of policy reloaded */
444 u32 deny_unknown; /* current setting of deny_unknown */
445 /*
446 * The version > 0 supports above members.
447 */
448} __packed;
449
450extern void selinux_status_update_setenforce(struct selinux_state *state,
451 int enforcing);
452extern void selinux_status_update_policyload(struct selinux_state *state,
453 int seqno);
454extern void selinux_complete_init(void);
455extern int selinux_disable(struct selinux_state *state);
456extern void exit_sel_fs(void);
457extern struct path selinux_null;
458extern void selnl_notify_setenforce(int val);
459extern void selnl_notify_policyload(u32 seqno);
460extern int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm);
461
462extern void avtab_cache_init(void);
463extern void ebitmap_cache_init(void);
464extern void hashtab_cache_init(void);
465extern int security_sidtab_hash_stats(struct selinux_state *state, char *page);
466
467#endif /* _SELINUX_SECURITY_H_ */
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Security server interface.
4 *
5 * Author : Stephen Smalley, <sds@tycho.nsa.gov>
6 *
7 */
8
9#ifndef _SELINUX_SECURITY_H_
10#define _SELINUX_SECURITY_H_
11
12#include <linux/compiler.h>
13#include <linux/dcache.h>
14#include <linux/magic.h>
15#include <linux/types.h>
16#include <linux/refcount.h>
17#include <linux/workqueue.h>
18#include "flask.h"
19
20#define SECSID_NULL 0x00000000 /* unspecified SID */
21#define SECSID_WILD 0xffffffff /* wildcard SID */
22#define SECCLASS_NULL 0x0000 /* no class */
23
24/* Identify specific policy version changes */
25#define POLICYDB_VERSION_BASE 15
26#define POLICYDB_VERSION_BOOL 16
27#define POLICYDB_VERSION_IPV6 17
28#define POLICYDB_VERSION_NLCLASS 18
29#define POLICYDB_VERSION_VALIDATETRANS 19
30#define POLICYDB_VERSION_MLS 19
31#define POLICYDB_VERSION_AVTAB 20
32#define POLICYDB_VERSION_RANGETRANS 21
33#define POLICYDB_VERSION_POLCAP 22
34#define POLICYDB_VERSION_PERMISSIVE 23
35#define POLICYDB_VERSION_BOUNDARY 24
36#define POLICYDB_VERSION_FILENAME_TRANS 25
37#define POLICYDB_VERSION_ROLETRANS 26
38#define POLICYDB_VERSION_NEW_OBJECT_DEFAULTS 27
39#define POLICYDB_VERSION_DEFAULT_TYPE 28
40#define POLICYDB_VERSION_CONSTRAINT_NAMES 29
41#define POLICYDB_VERSION_XPERMS_IOCTL 30
42#define POLICYDB_VERSION_INFINIBAND 31
43
44/* Range of policy versions we understand*/
45#define POLICYDB_VERSION_MIN POLICYDB_VERSION_BASE
46#define POLICYDB_VERSION_MAX POLICYDB_VERSION_INFINIBAND
47
48/* Mask for just the mount related flags */
49#define SE_MNTMASK 0x0f
50/* Super block security struct flags for mount options */
51/* BE CAREFUL, these need to be the low order bits for selinux_get_mnt_opts */
52#define CONTEXT_MNT 0x01
53#define FSCONTEXT_MNT 0x02
54#define ROOTCONTEXT_MNT 0x04
55#define DEFCONTEXT_MNT 0x08
56#define SBLABEL_MNT 0x10
57/* Non-mount related flags */
58#define SE_SBINITIALIZED 0x0100
59#define SE_SBPROC 0x0200
60#define SE_SBGENFS 0x0400
61#define SE_SBGENFS_XATTR 0x0800
62
63#define CONTEXT_STR "context"
64#define FSCONTEXT_STR "fscontext"
65#define ROOTCONTEXT_STR "rootcontext"
66#define DEFCONTEXT_STR "defcontext"
67#define SECLABEL_STR "seclabel"
68
69struct netlbl_lsm_secattr;
70
71extern int selinux_enabled;
72
73/* Policy capabilities */
74enum {
75 POLICYDB_CAPABILITY_NETPEER,
76 POLICYDB_CAPABILITY_OPENPERM,
77 POLICYDB_CAPABILITY_EXTSOCKCLASS,
78 POLICYDB_CAPABILITY_ALWAYSNETWORK,
79 POLICYDB_CAPABILITY_CGROUPSECLABEL,
80 POLICYDB_CAPABILITY_NNP_NOSUID_TRANSITION,
81 __POLICYDB_CAPABILITY_MAX
82};
83#define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1)
84
85extern const char *selinux_policycap_names[__POLICYDB_CAPABILITY_MAX];
86
87/*
88 * type_datum properties
89 * available at the kernel policy version >= POLICYDB_VERSION_BOUNDARY
90 */
91#define TYPEDATUM_PROPERTY_PRIMARY 0x0001
92#define TYPEDATUM_PROPERTY_ATTRIBUTE 0x0002
93
94/* limitation of boundary depth */
95#define POLICYDB_BOUNDS_MAXDEPTH 4
96
97struct selinux_avc;
98struct selinux_ss;
99
100struct selinux_state {
101 bool disabled;
102#ifdef CONFIG_SECURITY_SELINUX_DEVELOP
103 bool enforcing;
104#endif
105 bool checkreqprot;
106 bool initialized;
107 bool policycap[__POLICYDB_CAPABILITY_MAX];
108 struct selinux_avc *avc;
109 struct selinux_ss *ss;
110};
111
112void selinux_ss_init(struct selinux_ss **ss);
113void selinux_avc_init(struct selinux_avc **avc);
114
115extern struct selinux_state selinux_state;
116
117#ifdef CONFIG_SECURITY_SELINUX_DEVELOP
118static inline bool enforcing_enabled(struct selinux_state *state)
119{
120 return state->enforcing;
121}
122
123static inline void enforcing_set(struct selinux_state *state, bool value)
124{
125 state->enforcing = value;
126}
127#else
128static inline bool enforcing_enabled(struct selinux_state *state)
129{
130 return true;
131}
132
133static inline void enforcing_set(struct selinux_state *state, bool value)
134{
135}
136#endif
137
138static inline bool selinux_policycap_netpeer(void)
139{
140 struct selinux_state *state = &selinux_state;
141
142 return state->policycap[POLICYDB_CAPABILITY_NETPEER];
143}
144
145static inline bool selinux_policycap_openperm(void)
146{
147 struct selinux_state *state = &selinux_state;
148
149 return state->policycap[POLICYDB_CAPABILITY_OPENPERM];
150}
151
152static inline bool selinux_policycap_extsockclass(void)
153{
154 struct selinux_state *state = &selinux_state;
155
156 return state->policycap[POLICYDB_CAPABILITY_EXTSOCKCLASS];
157}
158
159static inline bool selinux_policycap_alwaysnetwork(void)
160{
161 struct selinux_state *state = &selinux_state;
162
163 return state->policycap[POLICYDB_CAPABILITY_ALWAYSNETWORK];
164}
165
166static inline bool selinux_policycap_cgroupseclabel(void)
167{
168 struct selinux_state *state = &selinux_state;
169
170 return state->policycap[POLICYDB_CAPABILITY_CGROUPSECLABEL];
171}
172
173static inline bool selinux_policycap_nnp_nosuid_transition(void)
174{
175 struct selinux_state *state = &selinux_state;
176
177 return state->policycap[POLICYDB_CAPABILITY_NNP_NOSUID_TRANSITION];
178}
179
180int security_mls_enabled(struct selinux_state *state);
181int security_load_policy(struct selinux_state *state,
182 void *data, size_t len);
183int security_read_policy(struct selinux_state *state,
184 void **data, size_t *len);
185size_t security_policydb_len(struct selinux_state *state);
186
187int security_policycap_supported(struct selinux_state *state,
188 unsigned int req_cap);
189
190#define SEL_VEC_MAX 32
191struct av_decision {
192 u32 allowed;
193 u32 auditallow;
194 u32 auditdeny;
195 u32 seqno;
196 u32 flags;
197};
198
199#define XPERMS_ALLOWED 1
200#define XPERMS_AUDITALLOW 2
201#define XPERMS_DONTAUDIT 4
202
203#define security_xperm_set(perms, x) (perms[x >> 5] |= 1 << (x & 0x1f))
204#define security_xperm_test(perms, x) (1 & (perms[x >> 5] >> (x & 0x1f)))
205struct extended_perms_data {
206 u32 p[8];
207};
208
209struct extended_perms_decision {
210 u8 used;
211 u8 driver;
212 struct extended_perms_data *allowed;
213 struct extended_perms_data *auditallow;
214 struct extended_perms_data *dontaudit;
215};
216
217struct extended_perms {
218 u16 len; /* length associated decision chain */
219 struct extended_perms_data drivers; /* flag drivers that are used */
220};
221
222/* definitions of av_decision.flags */
223#define AVD_FLAGS_PERMISSIVE 0x0001
224
225void security_compute_av(struct selinux_state *state,
226 u32 ssid, u32 tsid,
227 u16 tclass, struct av_decision *avd,
228 struct extended_perms *xperms);
229
230void security_compute_xperms_decision(struct selinux_state *state,
231 u32 ssid, u32 tsid, u16 tclass,
232 u8 driver,
233 struct extended_perms_decision *xpermd);
234
235void security_compute_av_user(struct selinux_state *state,
236 u32 ssid, u32 tsid,
237 u16 tclass, struct av_decision *avd);
238
239int security_transition_sid(struct selinux_state *state,
240 u32 ssid, u32 tsid, u16 tclass,
241 const struct qstr *qstr, u32 *out_sid);
242
243int security_transition_sid_user(struct selinux_state *state,
244 u32 ssid, u32 tsid, u16 tclass,
245 const char *objname, u32 *out_sid);
246
247int security_member_sid(struct selinux_state *state, u32 ssid, u32 tsid,
248 u16 tclass, u32 *out_sid);
249
250int security_change_sid(struct selinux_state *state, u32 ssid, u32 tsid,
251 u16 tclass, u32 *out_sid);
252
253int security_sid_to_context(struct selinux_state *state, u32 sid,
254 char **scontext, u32 *scontext_len);
255
256int security_sid_to_context_force(struct selinux_state *state,
257 u32 sid, char **scontext, u32 *scontext_len);
258
259int security_sid_to_context_inval(struct selinux_state *state,
260 u32 sid, char **scontext, u32 *scontext_len);
261
262int security_context_to_sid(struct selinux_state *state,
263 const char *scontext, u32 scontext_len,
264 u32 *out_sid, gfp_t gfp);
265
266int security_context_str_to_sid(struct selinux_state *state,
267 const char *scontext, u32 *out_sid, gfp_t gfp);
268
269int security_context_to_sid_default(struct selinux_state *state,
270 const char *scontext, u32 scontext_len,
271 u32 *out_sid, u32 def_sid, gfp_t gfp_flags);
272
273int security_context_to_sid_force(struct selinux_state *state,
274 const char *scontext, u32 scontext_len,
275 u32 *sid);
276
277int security_get_user_sids(struct selinux_state *state,
278 u32 callsid, char *username,
279 u32 **sids, u32 *nel);
280
281int security_port_sid(struct selinux_state *state,
282 u8 protocol, u16 port, u32 *out_sid);
283
284int security_ib_pkey_sid(struct selinux_state *state,
285 u64 subnet_prefix, u16 pkey_num, u32 *out_sid);
286
287int security_ib_endport_sid(struct selinux_state *state,
288 const char *dev_name, u8 port_num, u32 *out_sid);
289
290int security_netif_sid(struct selinux_state *state,
291 char *name, u32 *if_sid);
292
293int security_node_sid(struct selinux_state *state,
294 u16 domain, void *addr, u32 addrlen,
295 u32 *out_sid);
296
297int security_validate_transition(struct selinux_state *state,
298 u32 oldsid, u32 newsid, u32 tasksid,
299 u16 tclass);
300
301int security_validate_transition_user(struct selinux_state *state,
302 u32 oldsid, u32 newsid, u32 tasksid,
303 u16 tclass);
304
305int security_bounded_transition(struct selinux_state *state,
306 u32 oldsid, u32 newsid);
307
308int security_sid_mls_copy(struct selinux_state *state,
309 u32 sid, u32 mls_sid, u32 *new_sid);
310
311int security_net_peersid_resolve(struct selinux_state *state,
312 u32 nlbl_sid, u32 nlbl_type,
313 u32 xfrm_sid,
314 u32 *peer_sid);
315
316int security_get_classes(struct selinux_state *state,
317 char ***classes, int *nclasses);
318int security_get_permissions(struct selinux_state *state,
319 char *class, char ***perms, int *nperms);
320int security_get_reject_unknown(struct selinux_state *state);
321int security_get_allow_unknown(struct selinux_state *state);
322
323#define SECURITY_FS_USE_XATTR 1 /* use xattr */
324#define SECURITY_FS_USE_TRANS 2 /* use transition SIDs, e.g. devpts/tmpfs */
325#define SECURITY_FS_USE_TASK 3 /* use task SIDs, e.g. pipefs/sockfs */
326#define SECURITY_FS_USE_GENFS 4 /* use the genfs support */
327#define SECURITY_FS_USE_NONE 5 /* no labeling support */
328#define SECURITY_FS_USE_MNTPOINT 6 /* use mountpoint labeling */
329#define SECURITY_FS_USE_NATIVE 7 /* use native label support */
330#define SECURITY_FS_USE_MAX 7 /* Highest SECURITY_FS_USE_XXX */
331
332int security_fs_use(struct selinux_state *state, struct super_block *sb);
333
334int security_genfs_sid(struct selinux_state *state,
335 const char *fstype, char *name, u16 sclass,
336 u32 *sid);
337
338#ifdef CONFIG_NETLABEL
339int security_netlbl_secattr_to_sid(struct selinux_state *state,
340 struct netlbl_lsm_secattr *secattr,
341 u32 *sid);
342
343int security_netlbl_sid_to_secattr(struct selinux_state *state,
344 u32 sid,
345 struct netlbl_lsm_secattr *secattr);
346#else
347static inline int security_netlbl_secattr_to_sid(struct selinux_state *state,
348 struct netlbl_lsm_secattr *secattr,
349 u32 *sid)
350{
351 return -EIDRM;
352}
353
354static inline int security_netlbl_sid_to_secattr(struct selinux_state *state,
355 u32 sid,
356 struct netlbl_lsm_secattr *secattr)
357{
358 return -ENOENT;
359}
360#endif /* CONFIG_NETLABEL */
361
362const char *security_get_initial_sid_context(u32 sid);
363
364/*
365 * status notifier using mmap interface
366 */
367extern struct page *selinux_kernel_status_page(struct selinux_state *state);
368
369#define SELINUX_KERNEL_STATUS_VERSION 1
370struct selinux_kernel_status {
371 u32 version; /* version number of thie structure */
372 u32 sequence; /* sequence number of seqlock logic */
373 u32 enforcing; /* current setting of enforcing mode */
374 u32 policyload; /* times of policy reloaded */
375 u32 deny_unknown; /* current setting of deny_unknown */
376 /*
377 * The version > 0 supports above members.
378 */
379} __packed;
380
381extern void selinux_status_update_setenforce(struct selinux_state *state,
382 int enforcing);
383extern void selinux_status_update_policyload(struct selinux_state *state,
384 int seqno);
385extern void selinux_complete_init(void);
386extern int selinux_disable(struct selinux_state *state);
387extern void exit_sel_fs(void);
388extern struct path selinux_null;
389extern struct vfsmount *selinuxfs_mount;
390extern void selnl_notify_setenforce(int val);
391extern void selnl_notify_policyload(u32 seqno);
392extern int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm);
393
394extern void avtab_cache_init(void);
395extern void ebitmap_cache_init(void);
396extern void hashtab_cache_init(void);
397
398#endif /* _SELINUX_SECURITY_H_ */