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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 "flask.h"
20#include "policycap.h"
21
22#define SECSID_NULL 0x00000000
23#define SECSID_WILD 0xffffffff
24#define SECCLASS_NULL 0x0000
25
26
27#define POLICYDB_VERSION_BASE 15
28#define POLICYDB_VERSION_BOOL 16
29#define POLICYDB_VERSION_IPV6 17
30#define POLICYDB_VERSION_NLCLASS 18
31#define POLICYDB_VERSION_VALIDATETRANS 19
32#define POLICYDB_VERSION_MLS 19
33#define POLICYDB_VERSION_AVTAB 20
34#define POLICYDB_VERSION_RANGETRANS 21
35#define POLICYDB_VERSION_POLCAP 22
36#define POLICYDB_VERSION_PERMISSIVE 23
37#define POLICYDB_VERSION_BOUNDARY 24
38#define POLICYDB_VERSION_FILENAME_TRANS 25
39#define POLICYDB_VERSION_ROLETRANS 26
40#define POLICYDB_VERSION_NEW_OBJECT_DEFAULTS 27
41#define POLICYDB_VERSION_DEFAULT_TYPE 28
42#define POLICYDB_VERSION_CONSTRAINT_NAMES 29
43#define POLICYDB_VERSION_XPERMS_IOCTL 30
44#define POLICYDB_VERSION_INFINIBAND 31
45#define POLICYDB_VERSION_GLBLUB 32
46#define POLICYDB_VERSION_COMP_FTRANS 33
47
48
49#define POLICYDB_VERSION_MIN POLICYDB_VERSION_BASE
50#define POLICYDB_VERSION_MAX POLICYDB_VERSION_COMP_FTRANS
51
52
53#define SE_MNTMASK 0x0f
54
55
56#define CONTEXT_MNT 0x01
57#define FSCONTEXT_MNT 0x02
58#define ROOTCONTEXT_MNT 0x04
59#define DEFCONTEXT_MNT 0x08
60#define SBLABEL_MNT 0x10
61
62#define SE_SBINITIALIZED 0x0100
63#define SE_SBPROC 0x0200
64#define SE_SBGENFS 0x0400
65#define SE_SBGENFS_XATTR 0x0800
66
67#define CONTEXT_STR "context"
68#define FSCONTEXT_STR "fscontext"
69#define ROOTCONTEXT_STR "rootcontext"
70#define DEFCONTEXT_STR "defcontext"
71#define SECLABEL_STR "seclabel"
72
73struct netlbl_lsm_secattr;
74
75extern int selinux_enabled_boot;
76
77
78
79
80
81#define TYPEDATUM_PROPERTY_PRIMARY 0x0001
82#define TYPEDATUM_PROPERTY_ATTRIBUTE 0x0002
83
84
85#define POLICYDB_BOUNDS_MAXDEPTH 4
86
87struct selinux_avc;
88struct selinux_policy;
89
90struct selinux_state {
91#ifdef CONFIG_SECURITY_SELINUX_DISABLE
92 bool disabled;
93#endif
94#ifdef CONFIG_SECURITY_SELINUX_DEVELOP
95 bool enforcing;
96#endif
97 bool checkreqprot;
98 bool initialized;
99 bool policycap[__POLICYDB_CAPABILITY_MAX];
100
101 struct page *status_page;
102 struct mutex status_lock;
103
104 struct selinux_avc *avc;
105 struct selinux_policy __rcu *policy;
106 struct mutex policy_mutex;
107} __randomize_layout;
108
109void selinux_avc_init(struct selinux_avc **avc);
110
111extern struct selinux_state selinux_state;
112
113static inline bool selinux_initialized(const struct selinux_state *state)
114{
115
116 return smp_load_acquire(&state->initialized);
117}
118
119static inline void selinux_mark_initialized(struct selinux_state *state)
120{
121
122 smp_store_release(&state->initialized, true);
123}
124
125#ifdef CONFIG_SECURITY_SELINUX_DEVELOP
126static inline bool enforcing_enabled(struct selinux_state *state)
127{
128 return READ_ONCE(state->enforcing);
129}
130
131static inline void enforcing_set(struct selinux_state *state, bool value)
132{
133 WRITE_ONCE(state->enforcing, value);
134}
135#else
136static inline bool enforcing_enabled(struct selinux_state *state)
137{
138 return true;
139}
140
141static inline void enforcing_set(struct selinux_state *state, bool value)
142{
143}
144#endif
145
146static inline bool checkreqprot_get(const struct selinux_state *state)
147{
148 return READ_ONCE(state->checkreqprot);
149}
150
151static inline void checkreqprot_set(struct selinux_state *state, bool value)
152{
153 WRITE_ONCE(state->checkreqprot, value);
154}
155
156#ifdef CONFIG_SECURITY_SELINUX_DISABLE
157static inline bool selinux_disabled(struct selinux_state *state)
158{
159 return READ_ONCE(state->disabled);
160}
161
162static inline void selinux_mark_disabled(struct selinux_state *state)
163{
164 WRITE_ONCE(state->disabled, true);
165}
166#else
167static inline bool selinux_disabled(struct selinux_state *state)
168{
169 return false;
170}
171#endif
172
173static inline bool selinux_policycap_netpeer(void)
174{
175 struct selinux_state *state = &selinux_state;
176
177 return READ_ONCE(state->policycap[POLICYDB_CAPABILITY_NETPEER]);
178}
179
180static inline bool selinux_policycap_openperm(void)
181{
182 struct selinux_state *state = &selinux_state;
183
184 return READ_ONCE(state->policycap[POLICYDB_CAPABILITY_OPENPERM]);
185}
186
187static inline bool selinux_policycap_extsockclass(void)
188{
189 struct selinux_state *state = &selinux_state;
190
191 return READ_ONCE(state->policycap[POLICYDB_CAPABILITY_EXTSOCKCLASS]);
192}
193
194static inline bool selinux_policycap_alwaysnetwork(void)
195{
196 struct selinux_state *state = &selinux_state;
197
198 return READ_ONCE(state->policycap[POLICYDB_CAPABILITY_ALWAYSNETWORK]);
199}
200
201static inline bool selinux_policycap_cgroupseclabel(void)
202{
203 struct selinux_state *state = &selinux_state;
204
205 return READ_ONCE(state->policycap[POLICYDB_CAPABILITY_CGROUPSECLABEL]);
206}
207
208static inline bool selinux_policycap_nnp_nosuid_transition(void)
209{
210 struct selinux_state *state = &selinux_state;
211
212 return READ_ONCE(state->policycap[POLICYDB_CAPABILITY_NNP_NOSUID_TRANSITION]);
213}
214
215static inline bool selinux_policycap_genfs_seclabel_symlinks(void)
216{
217 struct selinux_state *state = &selinux_state;
218
219 return READ_ONCE(state->policycap[POLICYDB_CAPABILITY_GENFS_SECLABEL_SYMLINKS]);
220}
221
222int security_mls_enabled(struct selinux_state *state);
223int security_load_policy(struct selinux_state *state,
224 void *data, size_t len,
225 struct selinux_policy **newpolicyp);
226void selinux_policy_commit(struct selinux_state *state,
227 struct selinux_policy *newpolicy);
228void selinux_policy_cancel(struct selinux_state *state,
229 struct selinux_policy *policy);
230int security_read_policy(struct selinux_state *state,
231 void **data, size_t *len);
232
233int security_policycap_supported(struct selinux_state *state,
234 unsigned int req_cap);
235
236#define SEL_VEC_MAX 32
237struct av_decision {
238 u32 allowed;
239 u32 auditallow;
240 u32 auditdeny;
241 u32 seqno;
242 u32 flags;
243};
244
245#define XPERMS_ALLOWED 1
246#define XPERMS_AUDITALLOW 2
247#define XPERMS_DONTAUDIT 4
248
249#define security_xperm_set(perms, x) (perms[x >> 5] |= 1 << (x & 0x1f))
250#define security_xperm_test(perms, x) (1 & (perms[x >> 5] >> (x & 0x1f)))
251struct extended_perms_data {
252 u32 p[8];
253};
254
255struct extended_perms_decision {
256 u8 used;
257 u8 driver;
258 struct extended_perms_data *allowed;
259 struct extended_perms_data *auditallow;
260 struct extended_perms_data *dontaudit;
261};
262
263struct extended_perms {
264 u16 len;
265 struct extended_perms_data drivers;
266};
267
268
269#define AVD_FLAGS_PERMISSIVE 0x0001
270
271void security_compute_av(struct selinux_state *state,
272 u32 ssid, u32 tsid,
273 u16 tclass, struct av_decision *avd,
274 struct extended_perms *xperms);
275
276void security_compute_xperms_decision(struct selinux_state *state,
277 u32 ssid, u32 tsid, u16 tclass,
278 u8 driver,
279 struct extended_perms_decision *xpermd);
280
281void security_compute_av_user(struct selinux_state *state,
282 u32 ssid, u32 tsid,
283 u16 tclass, struct av_decision *avd);
284
285int security_transition_sid(struct selinux_state *state,
286 u32 ssid, u32 tsid, u16 tclass,
287 const struct qstr *qstr, u32 *out_sid);
288
289int security_transition_sid_user(struct selinux_state *state,
290 u32 ssid, u32 tsid, u16 tclass,
291 const char *objname, u32 *out_sid);
292
293int security_member_sid(struct selinux_state *state, u32 ssid, u32 tsid,
294 u16 tclass, u32 *out_sid);
295
296int security_change_sid(struct selinux_state *state, u32 ssid, u32 tsid,
297 u16 tclass, u32 *out_sid);
298
299int security_sid_to_context(struct selinux_state *state, u32 sid,
300 char **scontext, u32 *scontext_len);
301
302int security_sid_to_context_force(struct selinux_state *state,
303 u32 sid, char **scontext, u32 *scontext_len);
304
305int security_sid_to_context_inval(struct selinux_state *state,
306 u32 sid, char **scontext, u32 *scontext_len);
307
308int security_context_to_sid(struct selinux_state *state,
309 const char *scontext, u32 scontext_len,
310 u32 *out_sid, gfp_t gfp);
311
312int security_context_str_to_sid(struct selinux_state *state,
313 const char *scontext, u32 *out_sid, gfp_t gfp);
314
315int security_context_to_sid_default(struct selinux_state *state,
316 const char *scontext, u32 scontext_len,
317 u32 *out_sid, u32 def_sid, gfp_t gfp_flags);
318
319int security_context_to_sid_force(struct selinux_state *state,
320 const char *scontext, u32 scontext_len,
321 u32 *sid);
322
323int security_get_user_sids(struct selinux_state *state,
324 u32 callsid, char *username,
325 u32 **sids, u32 *nel);
326
327int security_port_sid(struct selinux_state *state,
328 u8 protocol, u16 port, u32 *out_sid);
329
330int security_ib_pkey_sid(struct selinux_state *state,
331 u64 subnet_prefix, u16 pkey_num, u32 *out_sid);
332
333int security_ib_endport_sid(struct selinux_state *state,
334 const char *dev_name, u8 port_num, u32 *out_sid);
335
336int security_netif_sid(struct selinux_state *state,
337 char *name, u32 *if_sid);
338
339int security_node_sid(struct selinux_state *state,
340 u16 domain, void *addr, u32 addrlen,
341 u32 *out_sid);
342
343int security_validate_transition(struct selinux_state *state,
344 u32 oldsid, u32 newsid, u32 tasksid,
345 u16 tclass);
346
347int security_validate_transition_user(struct selinux_state *state,
348 u32 oldsid, u32 newsid, u32 tasksid,
349 u16 tclass);
350
351int security_bounded_transition(struct selinux_state *state,
352 u32 oldsid, u32 newsid);
353
354int security_sid_mls_copy(struct selinux_state *state,
355 u32 sid, u32 mls_sid, u32 *new_sid);
356
357int security_net_peersid_resolve(struct selinux_state *state,
358 u32 nlbl_sid, u32 nlbl_type,
359 u32 xfrm_sid,
360 u32 *peer_sid);
361
362int security_get_classes(struct selinux_policy *policy,
363 char ***classes, int *nclasses);
364int security_get_permissions(struct selinux_policy *policy,
365 char *class, char ***perms, int *nperms);
366int security_get_reject_unknown(struct selinux_state *state);
367int security_get_allow_unknown(struct selinux_state *state);
368
369#define SECURITY_FS_USE_XATTR 1
370#define SECURITY_FS_USE_TRANS 2
371#define SECURITY_FS_USE_TASK 3
372#define SECURITY_FS_USE_GENFS 4
373#define SECURITY_FS_USE_NONE 5
374#define SECURITY_FS_USE_MNTPOINT 6
375#define SECURITY_FS_USE_NATIVE 7
376#define SECURITY_FS_USE_MAX 7
377
378int security_fs_use(struct selinux_state *state, struct super_block *sb);
379
380int security_genfs_sid(struct selinux_state *state,
381 const char *fstype, char *name, u16 sclass,
382 u32 *sid);
383
384int selinux_policy_genfs_sid(struct selinux_policy *policy,
385 const char *fstype, char *name, u16 sclass,
386 u32 *sid);
387
388#ifdef CONFIG_NETLABEL
389int security_netlbl_secattr_to_sid(struct selinux_state *state,
390 struct netlbl_lsm_secattr *secattr,
391 u32 *sid);
392
393int security_netlbl_sid_to_secattr(struct selinux_state *state,
394 u32 sid,
395 struct netlbl_lsm_secattr *secattr);
396#else
397static inline int security_netlbl_secattr_to_sid(struct selinux_state *state,
398 struct netlbl_lsm_secattr *secattr,
399 u32 *sid)
400{
401 return -EIDRM;
402}
403
404static inline int security_netlbl_sid_to_secattr(struct selinux_state *state,
405 u32 sid,
406 struct netlbl_lsm_secattr *secattr)
407{
408 return -ENOENT;
409}
410#endif
411
412const char *security_get_initial_sid_context(u32 sid);
413
414
415
416
417extern struct page *selinux_kernel_status_page(struct selinux_state *state);
418
419#define SELINUX_KERNEL_STATUS_VERSION 1
420struct selinux_kernel_status {
421 u32 version;
422 u32 sequence;
423 u32 enforcing;
424 u32 policyload;
425 u32 deny_unknown;
426
427
428
429} __packed;
430
431extern void selinux_status_update_setenforce(struct selinux_state *state,
432 int enforcing);
433extern void selinux_status_update_policyload(struct selinux_state *state,
434 int seqno);
435extern void selinux_complete_init(void);
436extern int selinux_disable(struct selinux_state *state);
437extern void exit_sel_fs(void);
438extern struct path selinux_null;
439extern struct vfsmount *selinuxfs_mount;
440extern void selnl_notify_setenforce(int val);
441extern void selnl_notify_policyload(u32 seqno);
442extern int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm);
443
444extern void avtab_cache_init(void);
445extern void ebitmap_cache_init(void);
446extern void hashtab_cache_init(void);
447extern int security_sidtab_hash_stats(struct selinux_state *state, char *page);
448
449#endif
450