aboutsummaryrefslogtreecommitdiff
path: root/include/linux/lsm_hooks.h
blob: ec3a6bab29de3ac499637a1d848f7cd5c6d80c32 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
/*
 * Linux Security Module interfaces
 *
 * Copyright (C) 2001 WireX Communications, Inc <chris@wirex.com>
 * Copyright (C) 2001 Greg Kroah-Hartman <greg@kroah.com>
 * Copyright (C) 2001 Networks Associates Technology, Inc <ssmalley@nai.com>
 * Copyright (C) 2001 James Morris <jmorris@intercode.com.au>
 * Copyright (C) 2001 Silicon Graphics, Inc. (Trust Technology Group)
 * Copyright (C) 2015 Intel Corporation.
 * Copyright (C) 2015 Casey Schaufler <casey@schaufler-ca.com>
 *
 *	This program is free software; you can redistribute it and/or modify
 *	it under the terms of the GNU General Public License as published by
 *	the Free Software Foundation; either version 2 of the License, or
 *	(at your option) any later version.
 *
 *	Due to this file being licensed under the GPL there is controversy over
 *	whether this permits you to write a module that #includes this file
 *	without placing your module under the GPL.  Please consult a lawyer for
 *	advice before doing this.
 *
 */

#ifndef __LINUX_LSM_HOOKS_H
#define __LINUX_LSM_HOOKS_H

#include <linux/security.h>
#include <linux/init.h>
#include <linux/rculist.h>

/**
 * Security hooks for program execution operations.
 *
 * @bprm_set_creds:
 *	Save security information in the bprm->security field, typically based
 *	on information about the bprm->file, for later use by the apply_creds
 *	hook.  This hook may also optionally check permissions (e.g. for
 *	transitions between security domains).
 *	This hook may be called multiple times during a single execve, e.g. for
 *	interpreters.  The hook can tell whether it has already been called by
 *	checking to see if @bprm->security is non-NULL.  If so, then the hook
 *	may decide either to retain the security information saved earlier or
 *	to replace it.
 *	@bprm contains the linux_binprm structure.
 *	Return 0 if the hook is successful and permission is granted.
 * @bprm_check_security:
 *	This hook mediates the point when a search for a binary handler will
 *	begin.  It allows a check the @bprm->security value which is set in the
 *	preceding set_creds call.  The primary difference from set_creds is
 *	that the argv list and envp list are reliably available in @bprm.  This
 *	hook may be called multiple times during a single execve; and in each
 *	pass set_creds is called first.
 *	@bprm contains the linux_binprm structure.
 *	Return 0 if the hook is successful and permission is granted.
 * @bprm_committing_creds:
 *	Prepare to install the new security attributes of a process being
 *	transformed by an execve operation, based on the old credentials
 *	pointed to by @current->cred and the information set in @bprm->cred by
 *	the bprm_set_creds hook.  @bprm points to the linux_binprm structure.
 *	This hook is a good place to perform state changes on the process such
 *	as closing open file descriptors to which access will no longer be
 *	granted when the attributes are changed.  This is called immediately
 *	before commit_creds().
 * @bprm_committed_creds:
 *	Tidy up after the installation of the new security attributes of a
 *	process being transformed by an execve operation.  The new credentials
 *	have, by this point, been set to @current->cred.  @bprm points to the
 *	linux_binprm structure.  This hook is a good place to perform state
 *	changes on the process such as clearing out non-inheritable signal
 *	state.  This is called immediately after commit_creds().
 * @bprm_secureexec:
 *	Return a boolean value (0 or 1) indicating whether a "secure exec"
 *	is required.  The flag is passed in the auxiliary table
 *	on the initial stack to the ELF interpreter to indicate whether libc
 *	should enable secure mode.
 *	@bprm contains the linux_binprm structure.
 *
 * Security hooks for filesystem operations.
 *
 * @sb_alloc_security:
 *	Allocate and attach a security structure to the sb->s_security field.
 *	The s_security field is initialized to NULL when the structure is
 *	allocated.
 *	@sb contains the super_block structure to be modified.
 *	Return 0 if operation was successful.
 * @sb_free_security:
 *	Deallocate and clear the sb->s_security field.
 *	@sb contains the super_block structure to be modified.
 * @sb_statfs:
 *	Check permission before obtaining filesystem statistics for the @mnt
 *	mountpoint.
 *	@dentry is a handle on the superblock for the filesystem.
 *	Return 0 if permission is granted.
 * @sb_mount:
 *	Check permission before an object specified by @dev_name is mounted on
 *	the mount point named by @nd.  For an ordinary mount, @dev_name
 *	identifies a device if the file system type requires a device.  For a
 *	remount (@flags & MS_REMOUNT), @dev_name is irrelevant.  For a
 *	loopback/bind mount (@flags & MS_BIND), @dev_name identifies the
 *	pathname of the object being mounted.
 *	@dev_name contains the name for object being mounted.
 *	@path contains the path for mount point object.
 *	@type contains the filesystem type.
 *	@flags contains the mount flags.
 *	@data contains the filesystem-specific data.
 *	Return 0 if permission is granted.
 * @sb_copy_data:
 *	Allow mount option data to be copied prior to parsing by the filesystem,
 *	so that the security module can extract security-specific mount
 *	options cleanly (a filesystem may modify the data e.g. with strsep()).
 *	This also allows the original mount data to be stripped of security-
 *	specific options to avoid having to make filesystems aware of them.
 *	@type the type of filesystem being mounted.
 *	@orig the original mount data copied from userspace.
 *	@copy copied data which will be passed to the security module.
 *	Returns 0 if the copy was successful.
 * @sb_remount:
 *	Extracts security system specific mount options and verifies no changes
 *	are being made to those options.
 *	@sb superblock being remounted
 *	@data contains the filesystem-specific data.
 *	Return 0 if permission is granted.
 * @sb_umount:
 *	Check permission before the @mnt file system is unmounted.
 *	@mnt contains the mounted file system.
 *	@flags contains the unmount flags, e.g. MNT_FORCE.
 *	Return 0 if permission is granted.
 * @sb_pivotroot:
 *	Check permission before pivoting the root filesystem.
 *	@old_path contains the path for the new location of the
 *	current root (put_old).
 *	@new_path contains the path for the new root (new_root).
 *	Return 0 if permission is granted.
 * @sb_set_mnt_opts:
 *	Set the security relevant mount options used for a superblock
 *	@sb the superblock to set security mount options for
 *	@opts binary data structure containing all lsm mount data
 * @sb_clone_mnt_opts:
 *	Copy all security options from a given superblock to another
 *	@oldsb old superblock which contain information to clone
 *	@newsb new superblock which needs filled in
 * @sb_parse_opts_str:
 *	Parse a string of security data filling in the opts structure
 *	@options string containing all mount options known by the LSM
 *	@opts binary data structure usable by the LSM
 * @dentry_init_security:
 *	Compute a context for a dentry as the inode is not yet available
 *	since NFSv4 has no label backed by an EA anyway.
 *	@dentry dentry to use in calculating the context.
 *	@mode mode used to determine resource type.
 *	@name name of the last path component used to create file
 *	@ctx pointer to place the pointer to the resulting context in.
 *	@ctxlen point to place the length of the resulting context.
 *
 *
 * Security hooks for inode operations.
 *
 * @inode_alloc_security:
 *	Allocate and attach a security structure to @inode->i_security.  The
 *	i_security field is initialized to NULL when the inode structure is
 *	allocated.
 *	@inode contains the inode structure.
 *	Return 0 if operation was successful.
 * @inode_free_security:
 *	@inode contains the inode structure.
 *	Deallocate the inode security structure and set @inode->i_security to
 *	NULL.
 * @inode_init_security:
 *	Obtain the security attribute name suffix and value to set on a newly
 *	created inode and set up the incore security field for the new inode.
 *	This hook is called by the fs code as part of the inode creation
 *	transaction and provides for atomic labeling of the inode, unlike
 *	the post_create/mkdir/... hooks called by the VFS.  The hook function
 *	is expected to allocate the name and value via kmalloc, with the caller
 *	being responsible for calling kfree after using them.
 *	If the security module does not use security attributes or does
 *	not wish to put a security attribute on this particular inode,
 *	then it should return -EOPNOTSUPP to skip this processing.
 *	@inode contains the inode structure of the newly created inode.
 *	@dir contains the inode structure of the parent directory.
 *	@qstr contains the last path component of the new object
 *	@name will be set to the allocated name suffix (e.g. selinux).
 *	@value will be set to the allocated attribute value.
 *	@len will be set to the length of the value.
 *	Returns 0 if @name and @value have been successfully set,
 *		-EOPNOTSUPP if no security attribute is needed, or
 *		-ENOMEM on memory allocation failure.
 * @inode_create:
 *	Check permission to create a regular file.
 *	@dir contains inode structure of the parent of the new file.
 *	@dentry contains the dentry structure for the file to be created.
 *	@mode contains the file mode of the file to be created.
 *	Return 0 if permission is granted.
 * @inode_link:
 *	Check permission before creating a new hard link to a file.
 *	@old_dentry contains the dentry structure for an existing
 *	link to the file.
 *	@dir contains the inode structure of the parent directory
 *	of the new link.
 *	@new_dentry contains the dentry structure for the new link.
 *	Return 0 if permission is granted.
 * @path_link:
 *	Check permission before creating a new hard link to a file.
 *	@old_dentry contains the dentry structure for an existing link
 *	to the file.
 *	@new_dir contains the path structure of the parent directory of
 *	the new link.
 *	@new_dentry contains the dentry structure for the new link.
 *	Return 0 if permission is granted.
 * @inode_unlink:
 *	Check the permission to remove a hard link to a file.
 *	@dir contains the inode structure of parent directory of the file.
 *	@dentry contains the dentry structure for file to be unlinked.
 *	Return 0 if permission is granted.
 * @path_unlink:
 *	Check the permission to remove a hard link to a file.
 *	@dir contains the path structure of parent directory of the file.
 *	@dentry contains the dentry structure for file to be unlinked.
 *	Return 0 if permission is granted.
 * @inode_symlink:
 *	Check the permission to create a symbolic link to a file.
 *	@dir contains the inode structure of parent directory of
 *	the symbolic link.
 *	@dentry contains the dentry structure of the symbolic link.
 *	@old_name contains the pathname of file.
 *	Return 0 if permission is granted.
 * @path_symlink:
 *	Check the permission to create a symbolic link to a file.
 *	@dir contains the path structure of parent directory of
 *	the symbolic link.
 *	@dentry contains the dentry structure of the symbolic link.
 *	@old_name contains the pathname of file.
 *	Return 0 if permission is granted.
 * @inode_mkdir:
 *	Check permissions to create a new directory in the existing directory
 *	associated with inode structure @dir.
 *	@dir contains the inode structure of parent of the directory
 *	to be created.
 *	@dentry contains the dentry structure of new directory.
 *	@mode contains the mode of new directory.
 *	Return 0 if permission is granted.
 * @path_mkdir:
 *	Check permissions to create a new directory in the existing directory
 *	associated with path structure @path.
 *	@dir contains the path structure of parent of the directory
 *	to be created.
 *	@dentry contains the dentry structure of new directory.
 *	@mode contains the mode of new directory.
 *	Return 0 if permission is granted.
 * @inode_rmdir:
 *	Check the permission to remove a directory.
 *	@dir contains the inode structure of parent of the directory
 *	to be removed.
 *	@dentry contains the dentry structure of directory to be removed.
 *	Return 0 if permission is granted.
 * @path_rmdir:
 *	Check the permission to remove a directory.
 *	@dir contains the path structure of parent of the directory to be
 *	removed.
 *	@dentry contains the dentry structure of directory to be removed.
 *	Return 0 if permission is granted.
 * @inode_mknod:
 *	Check permissions when creating a special file (or a socket or a fifo
 *	file created via the mknod system call).  Note that if mknod operation
 *	is being done for a regular file, then the create hook will be called
 *	and not this hook.
 *	@dir contains the inode structure of parent of the new file.
 *	@dentry contains the dentry structure of the new file.
 *	@mode contains the mode of the new file.
 *	@dev contains the device number.
 *	Return 0 if permission is granted.
 * @path_mknod:
 *	Check permissions when creating a file. Note that this hook is called
 *	even if mknod operation is being done for a regular file.
 *	@dir contains the path structure of parent of the new file.
 *	@dentry contains the dentry structure of the new file.
 *	@mode contains the mode of the new file.
 *	@dev contains the undecoded device number. Use new_decode_dev() to get
 *	the decoded device number.
 *	Return 0 if permission is granted.
 * @inode_rename:
 *	Check for permission to rename a file or directory.
 *	@old_dir contains the inode structure for parent of the old link.
 *	@old_dentry contains the dentry structure of the old link.
 *	@new_dir contains the inode structure for parent of the new link.
 *	@new_dentry contains the dentry structure of the new link.
 *	Return 0 if permission is granted.
 * @path_rename:
 *	Check for permission to rename a file or directory.
 *	@old_dir contains the path structure for parent of the old link.
 *	@old_dentry contains the dentry structure of the old link.
 *	@new_dir contains the path structure for parent of the new link.
 *	@new_dentry contains the dentry structure of the new link.
 *	Return 0 if permission is granted.
 * @path_chmod:
 *	Check for permission to change DAC's permission of a file or directory.
 *	@dentry contains the dentry structure.
 *	@mnt contains the vfsmnt structure.
 *	@mode contains DAC's mode.
 *	Return 0 if permission is granted.
 * @path_chown:
 *	Check for permission to change owner/group of a file or directory.
 *	@path contains the path structure.
 *	@uid contains new owner's ID.
 *	@gid contains new group's ID.
 *	Return 0 if permission is granted.
 * @path_chroot:
 *	Check for permission to change root directory.
 *	@path contains the path structure.
 *	Return 0 if permission is granted.
 * @inode_readlink:
 *	Check the permission to read the symbolic link.
 *	@dentry contains the dentry structure for the file link.
 *	Return 0 if permission is granted.
 * @inode_follow_link:
 *	Check permission to follow a symbolic link when looking up a pathname.
 *	@dentry contains the dentry structure for the link.
 *	@inode contains the inode, which itself is not stable in RCU-walk
 *	@rcu indicates whether we are in RCU-walk mode.
 *	Return 0 if permission is granted.
 * @inode_permission:
 *	Check permission before accessing an inode.  This hook is called by the
 *	existing Linux permission function, so a security module can use it to
 *	provide additional checking for existing Linux permission checks.
 *	Notice that this hook is called when a file is opened (as well as many
 *	other operations), whereas the file_security_ops permission hook is
 *	called when the actual read/write operations are performed.
 *	@inode contains the inode structure to check.
 *	@mask contains the permission mask.
 *	Return 0 if permission is granted.
 * @inode_setattr:
 *	Check permission before setting file attributes.  Note that the kernel
 *	call to notify_change is performed from several locations, whenever
 *	file attributes change (such as when a file is truncated, chown/chmod
 *	operations, transferring disk quotas, etc).
 *	@dentry contains the dentry structure for the file.
 *	@attr is the iattr structure containing the new file attributes.
 *	Return 0 if permission is granted.
 * @path_truncate:
 *	Check permission before truncating a file.
 *	@path contains the path structure for the file.
 *	Return 0 if permission is granted.
 * @inode_getattr:
 *	Check permission before obtaining file attributes.
 *	@mnt is the vfsmount where the dentry was looked up
 *	@dentry contains the dentry structure for the file.
 *	Return 0 if permission is granted.
 * @inode_setxattr:
 *	Check permission before setting the extended attributes
 *	@value identified by @name for @dentry.
 *	Return 0 if permission is granted.
 * @inode_post_setxattr:
 *	Update inode security field after successful setxattr operation.
 *	@value identified by @name for @dentry.
 * @inode_getxattr:
 *	Check permission before obtaining the extended attributes
 *	identified by @name for @dentry.
 *	Return 0 if permission is granted.
 * @inode_listxattr:
 *	Check permission before obtaining the list of extended attribute
 *	names for @dentry.
 *	Return 0 if permission is granted.
 * @inode_removexattr:
 *	Check permission before removing the extended attribute
 *	identified by @name for @dentry.
 *	Return 0 if permission is granted.
 * @inode_getsecurity:
 *	Retrieve a copy of the extended attribute representation of the
 *	security label associated with @name for @inode via @buffer.  Note that
 *	@name is the remainder of the attribute name after the security prefix
 *	has been removed. @alloc is used to specify of the call should return a
 *	value via the buffer or just the value length Return size of buffer on
 *	success.
 * @inode_setsecurity:
 *	Set the security label associated with @name for @inode from the
 *	extended attribute value @value.  @size indicates the size of the
 *	@value in bytes.  @flags may be XATTR_CREATE, XATTR_REPLACE, or 0.
 *	Note that @name is the remainder of the attribute name after the
 *	security. prefix has been removed.
 *	Return 0 on success.
 * @inode_listsecurity:
 *	Copy the extended attribute names for the security labels
 *	associated with @inode into @buffer.  The maximum size of @buffer
 *	is specified by @buffer_size.  @buffer may be NULL to request
 *	the size of the buffer required.
 *	Returns number of bytes used/required on success.
 * @inode_need_killpriv:
 *	Called when an inode has been changed.
 *	@dentry is the dentry being changed.
 *	Return <0 on error to abort the inode change operation.
 *	Return 0 if inode_killpriv does not need to be called.
 *	Return >0 if inode_killpriv does need to be called.
 * @inode_killpriv:
 *	The setuid bit is being removed.  Remove similar security labels.
 *	Called with the dentry->d_inode->i_mutex held.
 *	@dentry is the dentry being changed.
 *	Return 0 on success.  If error is returned, then the operation
 *	causing setuid bit removal is failed.
 * @inode_getsecid:
 *	Get the secid associated with the node.
 *	@inode contains a pointer to the inode.
 *	@secid contains a pointer to the location where result will be saved.
 *	In case of failure, @secid will be set to zero.
 *
 * Security hooks for file operations
 *
 * @file_permission:
 *	Check file permissions before accessing an open file.  This hook is
 *	called by various operations that read or write files.  A security
 *	module can use this hook to perform additional checking on these
 *	operations, e.g.  to revalidate permissions on use to support privilege
 *	bracketing or policy changes.  Notice that this hook is used when the
 *	actual read/write operations are performed, whereas the
 *	inode_security_ops hook is called when a file is opened (as well as
 *	many other operations).
 *	Caveat:  Although this hook can be used to revalidate permissions for
 *	various system call operations that read or write files, it does not
 *	address the revalidation of permissions for memory-mapped files.
 *	Security modules must handle this separately if they need such
 *	revalidation.
 *	@file contains the file structure being accessed.
 *	@mask contains the requested permissions.
 *	Return 0 if permission is granted.
 * @file_alloc_security:
 *	Allocate and attach a security structure to the file->f_security field.
 *	The security field is initialized to NULL when the structure is first
 *	created.
 *	@file contains the file structure to secure.
 *	Return 0 if the hook is successful and permission is granted.
 * @file_free_security:
 *	Deallocate and free any security structures stored in file->f_security.
 *	@file contains the file structure being modified.
 * @file_ioctl:
 *	@file contains the file structure.
 *	@cmd contains the operation to perform.
 *	@arg contains the operational arguments.
 *	Check permission for an ioctl operation on @file.  Note that @arg
 *	sometimes represents a user space pointer; in other cases, it may be a
 *	simple integer value.  When @arg represents a user space pointer, it
 *	should never be used by the security module.
 *	Return 0 if permission is granted.
 * @mmap_addr :
 *	Check permissions for a mmap operation at @addr.
 *	@addr contains virtual address that will be used for the operation.
 *	Return 0 if permission is granted.
 * @mmap_file :
 *	Check permissions for a mmap operation.  The @file may be NULL, e.g.
 *	if mapping anonymous memory.
 *	@file contains the file structure for file to map (may be NULL).
 *	@reqprot contains the protection requested by the application.
 *	@prot contains the protection that will be applied by the kernel.
 *	@flags contains the operational flags.
 *	Return 0 if permission is granted.
 * @file_mprotect:
 *	Check permissions before changing memory access permissions.
 *	@vma contains the memory region to modify.
 *	@reqprot contains the protection requested by the application.
 *	@prot contains the protection that will be applied by the kernel.
 *	Return 0 if permission is granted.
 * @file_lock:
 *	Check permission before performing file locking operations.
 *	Note: this hook mediates both flock and fcntl style locks.
 *	@file contains the file structure.
 *	@cmd contains the posix-translated lock operation to perform
 *	(e.g. F_RDLCK, F_WRLCK).
 *	Return 0 if permission is granted.
 * @file_fcntl:
 *	Check permission before allowing the file operation specified by @cmd
 *	from being performed on the file @file.  Note that @arg sometimes
 *	represents a user space pointer; in other cases, it may be a simple
 *	integer value.  When @arg represents a user space pointer, it should
 *	never be used by the security module.
 *	@file contains the file structure.
 *	@cmd contains the operation to be performed.
 *	@arg contains the operational arguments.
 *	Return 0 if permission is granted.
 * @file_set_fowner:
 *	Save owner security information (typically from current->security) in
 *	file->f_security for later use by the send_sigiotask hook.
 *	@file contains the file structure to update.
 *	Return 0 on success.
 * @file_send_sigiotask:
 *	Check permission for the file owner @fown to send SIGIO or SIGURG to the
 *	process @tsk.  Note that this hook is sometimes called from interrupt.
 *	Note that the fown_struct, @fown, is never outside the context of a
 *	struct file, so the file structure (and associated security information)
 *	can always be obtained:
 *		container_of(fown, struct file, f_owner)
 *	@tsk contains the structure of task receiving signal.
 *	@fown contains the file owner information.
 *	@sig is the signal that will be sent.  When 0, kernel sends SIGIO.
 *	Return 0 if permission is granted.
 * @file_receive:
 *	This hook allows security modules to control the ability of a process
 *	to receive an open file descriptor via socket IPC.
 *	@file contains the file structure being received.
 *	Return 0 if permission is granted.
 * @file_open
 *	Save open-time permission checking state for later use upon
 *	file_permission, and recheck access if anything has changed
 *	since inode_permission.
 *
 * Security hooks for task operations.
 *
 * @task_create:
 *	Check permission before creating a child process.  See the clone(2)
 *	manual page for definitions of the @clone_flags.
 *	@clone_flags contains the flags indicating what should be shared.
 *	Return 0 if permission is granted.
 * @task_free:
 *	@task task being freed
 *	Handle release of task-related resources. (Note that this can be called
 *	from interrupt context.)
 * @cred_alloc_blank:
 *	@cred points to the credentials.
 *	@gfp indicates the atomicity of any memory allocations.
 *	Only allocate sufficient memory and attach to @cred such that
 *	cred_transfer() will not get ENOMEM.
 * @cred_free:
 *	@cred points to the credentials.
 *	Deallocate and clear the cred->security field in a set of credentials.
 * @cred_prepare:
 *	@new points to the new credentials.
 *	@old points to the original credentials.
 *	@gfp indicates the atomicity of any memory allocations.
 *	Prepare a new set of credentials by copying the data from the old set.
 * @cred_transfer:
 *	@new points to the new credentials.
 *	@old points to the original credentials.
 *	Transfer data from original creds to new creds
 * @kernel_act_as:
 *	Set the credentials for a kernel service to act as (subjective context).
 *	@new points to the credentials to be modified.
 *	@secid specifies the security ID to be set
 *	The current task must be the one that nominated @secid.
 *	Return 0 if successful.
 * @kernel_create_files_as:
 *	Set the file creation context in a set of credentials to be the same as
 *	the objective context of the specified inode.
 *	@new points to the credentials to be modified.
 *	@inode points to the inode to use as a reference.
 *	The current task must be the one that nominated @inode.
 *	Return 0 if successful.
 * @kernel_fw_from_file:
 *	Load firmware from userspace (not called for built-in firmware).
 *	@file contains the file structure pointing to the file containing
 *	the firmware to load. This argument will be NULL if the firmware
 *	was loaded via the uevent-triggered blob-based interface exposed
 *	by CONFIG_FW_LOADER_USER_HELPER.
 *	@buf pointer to buffer containing firmware contents.
 *	@size length of the firmware contents.
 *	Return 0 if permission is granted.
 * @kernel_module_request:
 *	Ability to trigger the kernel to automatically upcall to userspace for
 *	userspace to load a kernel module with the given name.
 *	@kmod_name name of the module requested by the kernel
 *	Return 0 if successful.
 * @kernel_module_from_file:
 *	Load a kernel module from userspace.
 *	@file contains the file structure pointing to the file containing
 *	the kernel module to load. If the module is being loaded from a blob,
 *	this argument will be NULL.
 *	Return 0 if permission is granted.
 * @task_fix_setuid:
 *	Update the module's state after setting one or more of the user
 *	identity attributes of the current process.  The @flags parameter
 *	indicates which of the set*uid system calls invoked this hook.  If
 *	@new is the set of credentials that will be installed.  Modifications
 *	should be made to this rather than to @current->cred.
 *	@old is the set of credentials that are being replaces
 *	@flags contains one of the LSM_SETID_* values.
 *	Return 0 on success.
 * @task_setpgid:
 *	Check permission before setting the process group identifier of the
 *	process @p to @pgid.
 *	@p contains the task_struct for process being modified.
 *	@pgid contains the new pgid.
 *	Return 0 if permission is granted.
 * @task_getpgid:
 *	Check permission before getting the process group identifier of the
 *	process @p.
 *	@p contains the task_struct for the process.
 *	Return 0 if permission is granted.
 * @task_getsid:
 *	Check permission before getting the session identifier of the process
 *	@p.
 *	@p contains the task_struct for the process.
 *	Return 0 if permission is granted.
 * @task_getsecid:
 *	Retrieve the security identifier of the process @p.
 *	@p contains the task_struct for the process and place is into @secid.
 *	In case of failure, @secid will be set to zero.
 *
 * @task_setnice:
 *	Check permission before setting the nice value of @p to @nice.
 *	@p contains the task_struct of process.
 *	@nice contains the new nice value.
 *	Return 0 if permission is granted.
 * @task_setioprio
 *	Check permission before setting the ioprio value of @p to @ioprio.
 *	@p contains the task_struct of process.
 *	@ioprio contains the new ioprio value
 *	Return 0 if permission is granted.
 * @task_getioprio
 *	Check permission before getting the ioprio value of @p.
 *	@p contains the task_struct of process.
 *	Return 0 if permission is granted.
 * @task_setrlimit:
 *	Check permission before setting the resource limits of the current
 *	process for @resource to @new_rlim.  The old resource limit values can
 *	be examined by dereferencing (current->signal->rlim + resource).
 *	@resource contains the resource whose limit is being set.
 *	@new_rlim contains the new limits for @resource.
 *	Return 0 if permission is granted.
 * @task_setscheduler:
 *	Check permission before setting scheduling policy and/or parameters of
 *	process @p based on @policy and @lp.
 *	@p contains the task_struct for process.
 *	@policy contains the scheduling policy.
 *	@lp contains the scheduling parameters.
 *	Return 0 if permission is granted.
 * @task_getscheduler:
 *	Check permission before obtaining scheduling information for process
 *	@p.
 *	@p contains the task_struct for process.
 *	Return 0 if permission is granted.
 * @task_movememory
 *	Check permission before moving memory owned by process @p.
 *	@p contains the task_struct for process.
 *	Return 0 if permission is granted.
 * @task_kill:
 *	Check permission before sending signal @sig to @p.  @info can be NULL,
 *	the constant 1, or a pointer to a siginfo structure.  If @info is 1 or
 *	SI_FROMKERNEL(info) is true, then the signal should be viewed as coming
 *	from the kernel and should typically be permitted.
 *	SIGIO signals are handled separately by the send_sigiotask hook in
 *	file_security_ops.
 *	@p contains the task_struct for process.
 *	@info contains the signal information.
 *	@sig contains the signal value.
 *	@secid contains the sid of the process where the signal originated
 *	Return 0 if permission is granted.
 * @task_wait:
 *	Check permission before allowing a process to reap a child process @p
 *	and collect its status information.
 *	@p contains the task_struct for process.
 *	Return 0 if permission is granted.
 * @task_prctl:
 *	Check permission before performing a process control operation on the
 *	current process.
 *	@option contains the operation.
 *	@arg2 contains a argument.
 *	@arg3 contains a argument.
 *	@arg4 contains a argument.
 *	@arg5 contains a argument.
 *	Return -ENOSYS if no-one wanted to handle this op, any other value to
 *	cause prctl() to return immediately with that value.
 * @task_to_inode:
 *	Set the security attributes for an inode based on an associated task's
 *	security attributes, e.g. for /proc/pid inodes.
 *	@p contains the task_struct for the task.
 *	@inode contains the inode structure for the inode.
 *
 * Security hooks for Netlink messaging.
 *
 * @netlink_send:
 *	Save security information for a netlink message so that permission
 *	checking can be performed when the message is processed.  The security
 *	information can be saved using the eff_cap field of the
 *	netlink_skb_parms structure.  Also may be used to provide fine
 *	grained control over message transmission.
 *	@sk associated sock of task sending the message.
 *	@skb contains the sk_buff structure for the netlink message.
 *	Return 0 if the information was successfully saved and message
 *	is allowed to be transmitted.
 *
 * Security hooks for Unix domain networking.
 *
 * @unix_stream_connect:
 *	Check permissions before establishing a Unix domain stream connection
 *	between @sock and @other.
 *	@sock contains the sock structure.
 *	@other contains the peer sock structure.
 *	@newsk contains the new sock structure.
 *	Return 0 if permission is granted.
 * @unix_may_send:
 *	Check permissions before connecting or sending datagrams from @sock to
 *	@other.
 *	@sock contains the socket structure.
 *	@other contains the peer socket structure.
 *	Return 0 if permission is granted.
 *
 * The @unix_stream_connect and @unix_may_send hooks were necessary because
 * Linux provides an alternative to the conventional file name space for Unix
 * domain sockets.  Whereas binding and connecting to sockets in the file name
 * space is mediated by the typical file permissions (and caught by the mknod
 * and permission hooks in inode_security_ops), binding and connecting to
 * sockets in the abstract name space is completely unmediated.  Sufficient
 * control of Unix domain sockets in the abstract name space isn't possible
 * using only the socket layer hooks, since we need to know the actual target
 * socket, which is not looked up until we are inside the af_unix code.
 *
 * Security hooks for socket operations.
 *
 * @socket_create:
 *	Check permissions prior to creating a new socket.
 *	@family contains the requested protocol family.
 *	@type contains the requested communications type.
 *	@protocol contains the requested protocol.
 *	@kern set to 1 if a kernel socket.
 *	Return 0 if permission is granted.
 * @socket_post_create:
 *	This hook allows a module to update or allocate a per-socket security
 *	structure. Note that the security field was not added directly to the
 *	socket structure, but rather, the socket security information is stored
 *	in the associated inode.  Typically, the inode alloc_security hook will
 *	allocate and and attach security information to
 *	sock->inode->i_security.  This hook may be used to update the
 *	sock->inode->i_security field with additional information that wasn't
 *	available when the inode was allocated.
 *	@sock contains the newly created socket structure.
 *	@family contains the requested protocol family.
 *	@type contains the requested communications type.
 *	@protocol contains the requested protocol.
 *	@kern set to 1 if a kernel socket.
 * @socket_bind:
 *	Check permission before socket protocol layer bind operation is
 *	performed and the socket @sock is bound to the address specified in the
 *	@address parameter.
 *	@sock contains the socket structure.
 *	@address contains the address to bind to.
 *	@addrlen contains the length of address.
 *	Return 0 if permission is granted.
 * @socket_connect:
 *	Check permission before socket protocol layer connect operation
 *	attempts to connect socket @sock to a remote address, @address.
 *	@sock contains the socket structure.
 *	@address contains the address of remote endpoint.
 *	@addrlen contains the length of address.
 *	Return 0 if permission is granted.
 * @socket_listen:
 *	Check permission before socket protocol layer listen operation.
 *	@sock contains the socket structure.
 *	@backlog contains the maximum length for the pending connection queue.
 *	Return 0 if permission is granted.
 * @socket_accept:
 *	Check permission before accepting a new connection.  Note that the new
 *	socket, @newsock, has been created and some information copied to it,
 *	but the accept operation has not actually been performed.
 *	@sock contains the listening socket structure.
 *	@newsock contains the newly created server socket for connection.
 *	Return 0 if permission is granted.
 * @socket_sendmsg:
 *	Check permission before transmitting a message to another socket.
 *	@sock contains the socket structure.
 *	@msg contains the message to be transmitted.
 *	@size contains the size of message.
 *	Return 0 if permission is granted.
 * @socket_recvmsg:
 *	Check permission before receiving a message from a socket.
 *	@sock contains the socket structure.
 *	@msg contains the message structure.
 *	@size contains the size of message structure.
 *	@flags contains the operational flags.
 *	Return 0 if permission is granted.
 * @socket_getsockname:
 *	Check permission before the local address (name) of the socket object
 *	@sock is retrieved.
 *	@sock contains the socket structure.
 *	Return 0 if permission is granted.
 * @socket_getpeername:
 *	Check permission before the remote address (name) of a socket object
 *	@sock is retrieved.
 *	@sock contains the socket structure.
 *	Return 0 if permission is granted.
 * @socket_getsockopt:
 *	Check permissions before retrieving the options associated with socket
 *	@sock.
 *	@sock contains the socket structure.
 *	@level contains the protocol level to retrieve option from.
 *	@optname contains the name of option to retrieve.
 *	Return 0 if permission is granted.
 * @socket_setsockopt:
 *	Check permissions before setting the options associated with socket
 *	@sock.
 *	@sock contains the socket structure.
 *	@level contains the protocol level to set options for.
 *	@optname contains the name of the option to set.
 *	Return 0 if permission is granted.
 * @socket_shutdown:
 *	Checks permission before all or part of a connection on the socket
 *	@sock is shut down.
 *	@sock contains the socket structure.
 *	@how contains the flag indicating how future sends and receives
 *	are handled.
 *	Return 0 if permission is granted.
 * @socket_sock_rcv_skb:
 *	Check permissions on incoming network packets.  This hook is distinct
 *	from Netfilter's IP input hooks since it is the first time that the
 *	incoming sk_buff @skb has been associated with a particular socket, @sk.
 *	Must not sleep inside this hook because some callers hold spinlocks.
 *	@sk contains the sock (not socket) associated with the incoming sk_buff.
 *	@skb contains the incoming network data.
 * @socket_getpeersec_stream:
 *	This hook allows the security module to provide peer socket security
 *	state for unix or connected tcp sockets to userspace via getsockopt
 *	SO_GETPEERSEC.  For tcp sockets this can be meaningful if the
 *	socket is associated with an ipsec SA.
 *	@sock is the local socket.
 *	@optval userspace memory where the security state is to be copied.
 *	@optlen userspace int where the module should copy the actual length
 *	of the security state.
 *	@len as input is the maximum length to copy to userspace provided
 *	by the caller.
 *	Return 0 if all is well, otherwise, typical getsockopt return
 *	values.
 * @socket_getpeersec_dgram:
 *	This hook allows the security module to provide peer socket security
 *	state for udp sockets on a per-packet basis to userspace via
 *	getsockopt SO_GETPEERSEC.  The application must first have indicated
 *	the IP_PASSSEC option via getsockopt.  It can then retrieve the
 *	security state returned by this hook for a packet via the SCM_SECURITY
 *	ancillary message type.
 *	@skb is the skbuff for the packet being queried
 *	@secdata is a pointer to a buffer in which to copy the security data
 *	@seclen is the maximum length for @secdata
 *	Return 0 on success, error on failure.
 * @sk_alloc_security:
 *	Allocate and attach a security structure to the sk->sk_security field,
 *	which is used to copy security attributes between local stream sockets.
 * @sk_free_security:
 *	Deallocate security structure.
 * @sk_clone_security:
 *	Clone/copy security structure.
 * @sk_getsecid:
 *	Retrieve the LSM-specific secid for the sock to enable caching
 *	of network authorizations.
 * @sock_graft:
 *	Sets the socket's isec sid to the sock's sid.
 * @inet_conn_request:
 *	Sets the openreq's sid to socket's sid with MLS portion taken
 *	from peer sid.
 * @inet_csk_clone:
 *	Sets the new child socket's sid to the openreq sid.
 * @inet_conn_established:
 *	Sets the connection's peersid to the secmark on skb.
 * @secmark_relabel_packet:
 *	check if the process should be allowed to relabel packets to
 *	the given secid
 * @security_secmark_refcount_inc
 *	tells the LSM to increment the number of secmark labeling rules loaded
 * @security_secmark_refcount_dec
 *	tells the LSM to decrement the number of secmark labeling rules loaded
 * @req_classify_flow:
 *	Sets the flow's sid to the openreq sid.
 * @tun_dev_alloc_security:
 *	This hook allows a module to allocate a security structure for a TUN
 *	device.
 *	@security pointer to a security structure pointer.
 *	Returns a zero on success, negative values on failure.
 * @tun_dev_free_security:
 *	This hook allows a module to free the security structure for a TUN
 *	device.
 *	@security pointer to the TUN device's security structure
 * @tun_dev_create:
 *	Check permissions prior to creating a new TUN device.
 * @tun_dev_attach_queue:
 *	Check permissions prior to attaching to a TUN device queue.
 *	@security pointer to the TUN device's security structure.
 * @tun_dev_attach:
 *	This hook can be used by the module to update any security state
 *	associated with the TUN device's sock structure.
 *	@sk contains the existing sock structure.
 *	@security pointer to the TUN device's security structure.
 * @tun_dev_open:
 *	This hook can be used by the module to update any security state
 *	associated with the TUN device's security structure.
 *	@security pointer to the TUN devices's security structure.
 *
 * Security hooks for XFRM operations.
 *
 * @xfrm_policy_alloc_security:
 *	@ctxp is a pointer to the xfrm_sec_ctx being added to Security Policy
 *	Database used by the XFRM system.
 *	@sec_ctx contains the security context information being provided by
 *	the user-level policy update program (e.g., setkey).
 *	Allocate a security structure to the xp->security field; the security
 *	field is initialized to NULL when the xfrm_policy is allocated.
 *	Return 0 if operation was successful (memory to allocate, legal context)
 *	@gfp is to specify the context for the allocation
 * @xfrm_policy_clone_security:
 *	@old_ctx contains an existing xfrm_sec_ctx.
 *	@new_ctxp contains a new xfrm_sec_ctx being cloned from old.
 *	Allocate a security structure in new_ctxp that contains the
 *	information from the old_ctx structure.
 *	Return 0 if operation was successful (memory to allocate).
 * @xfrm_policy_free_security:
 *	@ctx contains the xfrm_sec_ctx
 *	Deallocate xp->security.
 * @xfrm_policy_delete_security:
 *	@ctx contains the xfrm_sec_ctx.
 *	Authorize deletion of xp->security.
 * @xfrm_state_alloc:
 *	@x contains the xfrm_state being added to the Security Association
 *	Database by the XFRM system.
 *	@sec_ctx contains the security context information being provided by
 *	the user-level SA generation program (e.g., setkey or racoon).
 *	Allocate a security structure to the x->security field; the security
 *	field is initialized to NULL when the xfrm_state is allocated. Set the
 *	context to correspond to sec_ctx. Return 0 if operation was successful
 *	(memory to allocate, legal context).
 * @xfrm_state_alloc_acquire:
 *	@x contains the xfrm_state being added to the Security Association
 *	Database by the XFRM system.
 *	@polsec contains the policy's security context.
 *	@secid contains the secid from which to take the mls portion of the
 *	context.
 *	Allocate a security structure to the x->security field; the security
 *	field is initialized to NULL when the xfrm_state is allocated. Set the
 *	context to correspond to secid. Return 0 if operation was successful
 *	(memory to allocate, legal context).
 * @xfrm_state_free_security:
 *	@x contains the xfrm_state.
 *	Deallocate x->security.
 * @xfrm_state_delete_security:
 *	@x contains the xfrm_state.
 *	Authorize deletion of x->security.
 * @xfrm_policy_lookup:
 *	@ctx contains the xfrm_sec_ctx for which the access control is being
 *	checked.
 *	@fl_secid contains the flow security label that is used to authorize
 *	access to the policy xp.
 *	@dir contains the direction of the flow (input or output).
 *	Check permission when a flow selects a xfrm_policy for processing
 *	XFRMs on a packet.  The hook is called when selecting either a
 *	per-socket policy or a generic xfrm policy.
 *	Return 0 if permission is granted, -ESRCH otherwise, or -errno
 *	on other errors.
 * @xfrm_state_pol_flow_match:
 *	@x contains the state to match.
 *	@xp contains the policy to check for a match.
 *	@fl contains the flow to check for a match.
 *	Return 1 if there is a match.
 * @xfrm_decode_session:
 *	@skb points to skb to decode.
 *	@secid points to the flow key secid to set.
 *	@ckall says if all xfrms used should be checked for same secid.
 *	Return 0 if ckall is zero or all xfrms used have the same secid.
 *
 * Security hooks affecting all Key Management operations
 *
 * @key_alloc:
 *	Permit allocation of a key and assign security data. Note that key does
 *	not have a serial number assigned at this point.
 *	@key points to the key.
 *	@flags is the allocation flags
 *	Return 0 if permission is granted, -ve error otherwise.
 * @key_free:
 *	Notification of destruction; free security data.
 *	@key points to the key.
 *	No return value.
 * @key_permission:
 *	See whether a specific operational right is granted to a process on a
 *	key.
 *	@key_ref refers to the key (key pointer + possession attribute bit).
 *	@cred points to the credentials to provide the context against which to
 *	evaluate the security data on the key.
 *	@perm describes the combination of permissions required of this key.
 *	Return 0 if permission is granted, -ve error otherwise.
 * @key_getsecurity:
 *	Get a textual representation of the security context attached to a key
 *	for the purposes of honouring KEYCTL_GETSECURITY.  This function
 *	allocates the storage for the NUL-terminated string and the caller
 *	should free it.
 *	@key points to the key to be queried.
 *	@_buffer points to a pointer that should be set to point to the
 *	resulting string (if no label or an error occurs).
 *	Return the length of the string (including terminating NUL) or -ve if
 *	an error.
 *	May also return 0 (and a NULL buffer pointer) if there is no label.
 *
 * Security hooks affecting all System V IPC operations.
 *
 * @ipc_permission:
 *	Check permissions for access to IPC
 *	@ipcp contains the kernel IPC permission structure
 *	@flag contains the desired (requested) permission set
 *	Return 0 if permission is granted.
 * @ipc_getsecid:
 *	Get the secid associated with the ipc object.
 *	@ipcp contains the kernel IPC permission structure.
 *	@secid contains a pointer to the location where result will be saved.
 *	In case of failure, @secid will be set to zero.
 *
 * Security hooks for individual messages held in System V IPC message queues
 * @msg_msg_alloc_security:
 *	Allocate and attach a security structure to the msg->security field.
 *	The security field is initialized to NULL when the structure is first
 *	created.
 *	@msg contains the message structure to be modified.
 *	Return 0 if operation was successful and permission is granted.
 * @msg_msg_free_security:
 *	Deallocate the security structure for this message.
 *	@msg contains the message structure to be modified.
 *
 * Security hooks for System V IPC Message Queues
 *
 * @msg_queue_alloc_security:
 *	Allocate and attach a security structure to the
 *	msq->q_perm.security field. The security field is initialized to
 *	NULL when the structure is first created.
 *	@msq contains the message queue structure to be modified.
 *	Return 0 if operation was successful and permission is granted.
 * @msg_queue_free_security:
 *	Deallocate security structure for this message queue.
 *	@msq contains the message queue structure to be modified.
 * @msg_queue_associate:
 *	Check permission when a message queue is requested through the
 *	msgget system call.  This hook is only called when returning the
 *	message queue identifier for an existing message queue, not when a
 *	new message queue is created.
 *	@msq contains the message queue to act upon.
 *	@msqflg contains the operation control flags.
 *	Return 0 if permission is granted.
 * @msg_queue_msgctl:
 *	Check permission when a message control operation specified by @cmd
 *	is to be performed on the message queue @msq.
 *	The @msq may be NULL, e.g. for IPC_INFO or MSG_INFO.
 *	@msq contains the message queue to act upon.  May be NULL.
 *	@cmd contains the operation to be performed.
 *	Return 0 if permission is granted.
 * @msg_queue_msgsnd:
 *	Check permission before a message, @msg, is enqueued on the message
 *	queue, @msq.
 *	@msq contains the message queue to send message to.
 *	@msg contains the message to be enqueued.
 *	@msqflg contains operational flags.
 *	Return 0 if permission is granted.
 * @msg_queue_msgrcv:
 *	Check permission before a message, @msg, is removed from the message
 *	queue, @msq.  The @target task structure contains a pointer to the
 *	process that will be receiving the message (not equal to the current
 *	process when inline receives are being performed).
 *	@msq contains the message queue to retrieve message from.
 *	@msg contains the message destination.
 *	@target contains the task structure for recipient process.
 *	@type contains the type of message requested.
 *	@mode contains the operational flags.
 *	Return 0 if permission is granted.
 *
 * Security hooks for System V Shared Memory Segments
 *
 * @shm_alloc_security:
 *	Allocate and attach a security structure to the shp->shm_perm.security
 *	field.  The security field is initialized to NULL when the structure is
 *	first created.
 *	@shp contains the shared memory structure to be modified.
 *	Return 0 if operation was successful and permission is granted.
 * @shm_free_security:
 *	Deallocate the security struct for this memory segment.
 *	@shp contains the shared memory structure to be modified.
 * @shm_associate:
 *	Check permission when a shared memory region is requested through the
 *	shmget system call.  This hook is only called when returning the shared
 *	memory region identifier for an existing region, not when a new shared
 *	memory region is created.
 *	@shp contains the shared memory structure to be modified.
 *	@shmflg contains the operation control flags.
 *	Return 0 if permission is granted.
 * @shm_shmctl:
 *	Check permission when a shared memory control operation specified by
 *	@cmd is to be performed on the shared memory region @shp.
 *	The @shp may be NULL, e.g. for IPC_INFO or SHM_INFO.
 *	@shp contains shared memory structure to be modified.
 *	@cmd contains the operation to be performed.
 *	Return 0 if permission is granted.
 * @shm_shmat:
 *	Check permissions prior to allowing the shmat system call to attach the
 *	shared memory segment @shp to the data segment of the calling process.
 *	The attaching address is specified by @shmaddr.
 *	@shp contains the shared memory structure to be modified.
 *	@shmaddr contains the address to attach memory region to.
 *	@shmflg contains the operational flags.
 *	Return 0 if permission is granted.
 *
 * Security hooks for System V Semaphores
 *
 * @sem_alloc_security:
 *	Allocate and attach a security structure to the sma->sem_perm.security
 *	field.  The security field is initialized to NULL when the structure is
 *	first created.
 *	@sma contains the semaphore structure
 *	Return 0 if operation was successful and permission is granted.
 * @sem_free_security:
 *	deallocate security struct for this semaphore
 *	@sma contains the semaphore structure.
 * @sem_associate:
 *	Check permission when a semaphore is requested through the semget
 *	system call.  This hook is only called when returning the semaphore
 *	identifier for an existing semaphore, not when a new one must be
 *	created.
 *	@sma contains the semaphore structure.
 *	@semflg contains the operation control flags.
 *	Return 0 if permission is granted.
 * @sem_semctl:
 *	Check permission when a semaphore operation specified by @cmd is to be
 *	performed on the semaphore @sma.  The @sma may be NULL, e.g. for
 *	IPC_INFO or SEM_INFO.
 *	@sma contains the semaphore structure.  May be NULL.
 *	@cmd contains the operation to be performed.
 *	Return 0 if permission is granted.
 * @sem_semop
 *	Check permissions before performing operations on members of the
 *	semaphore set @sma.  If the @alter flag is nonzero, the semaphore set
 *	may be modified.
 *	@sma contains the semaphore structure.
 *	@sops contains the operations to perform.
 *	@nsops contains the number of operations to perform.
 *	@alter contains the flag indicating whether changes are to be made.
 *	Return 0 if permission is granted.
 *
 * @binder_set_context_mgr
 *	Check whether @mgr is allowed to be the binder context manager.
 *	@mgr contains the task_struct for the task being registered.
 *	Return 0 if permission is granted.
 * @binder_transaction
 *	Check whether @from is allowed to invoke a binder transaction call
 *	to @to.
 *	@from contains the task_struct for the sending task.
 *	@to contains the task_struct for the receiving task.
 * @binder_transfer_binder
 *	Check whether @from is allowed to transfer a binder reference to @to.
 *	@from contains the task_struct for the sending task.
 *	@to contains the task_struct for the receiving task.
 * @binder_transfer_file
 *	Check whether @from is allowed to transfer @file to @to.
 *	@from contains the task_struct for the sending task.
 *	@file contains the struct file being transferred.
 *	@to contains the task_struct for the receiving task.
 *
 * @ptrace_access_check:
 *	Check permission before allowing the current process to trace the
 *	@child process.
 *	Security modules may also want to perform a process tracing check
 *	during an execve in the set_security or apply_creds hooks of
 *	tracing check during an execve in the bprm_set_creds hook of
 *	binprm_security_ops if the process is being traced and its security
 *	attributes would be changed by the execve.
 *	@child contains the task_struct structure for the target process.
 *	@mode contains the PTRACE_MODE flags indicating the form of access.
 *	Return 0 if permission is granted.
 * @ptrace_traceme:
 *	Check that the @parent process has sufficient permission to trace the
 *	current process before allowing the current process to present itself
 *	to the @parent process for tracing.
 *	@parent contains the task_struct structure for debugger process.
 *	Return 0 if permission is granted.
 * @capget:
 *	Get the @effective, @inheritable, and @permitted capability sets for
 *	the @target process.  The hook may also perform permission checking to
 *	determine if the current process is allowed to see the capability sets
 *	of the @target process.
 *	@target contains the task_struct structure for target process.
 *	@effective contains the effective capability set.
 *	@inheritable contains the inheritable capability set.
 *	@permitted contains the permitted capability set.
 *	Return 0 if the capability sets were successfully obtained.
 * @capset:
 *	Set the @effective, @inheritable, and @permitted capability sets for
 *	the current process.
 *	@new contains the new credentials structure for target process.
 *	@old contains the current credentials structure for target process.
 *	@effective contains the effective capability set.
 *	@inheritable contains the inheritable capability set.
 *	@permitted contains the permitted capability set.
 *	Return 0 and update @new if permission is granted.
 * @capable:
 *	Check whether the @tsk process has the @cap capability in the indicated
 *	credentials.
 *	@cred contains the credentials to use.
 *	@ns contains the user namespace we want the capability in
 *	@cap contains the capability <include/linux/capability.h>.
 *	@audit: Whether to write an audit message or not
 *	Return 0 if the capability is granted for @tsk.
 * @syslog:
 *	Check permission before accessing the kernel message ring or changing
 *	logging to the console.
 *	See the syslog(2) manual page for an explanation of the @type values.
 *	@type contains the type of action.
 *	@from_file indicates the context of action (if it came from /proc).
 *	Return 0 if permission is granted.
 * @settime:
 *	Check permission to change the system time.
 *	struct timespec and timezone are defined in include/linux/time.h
 *	@ts contains new time
 *	@tz contains new timezone
 *	Return 0 if permission is granted.
 * @vm_enough_memory:
 *	Check permissions for allocating a new virtual mapping.
 *	@mm contains the mm struct it is being added to.
 *	@pages contains the number of pages.
 *	Return 0 if permission is granted.
 *
 * @ismaclabel:
 *	Check if the extended attribute specified by @name
 *	represents a MAC label. Returns 1 if name is a MAC
 *	attribute otherwise returns 0.
 *	@name full extended attribute name to check against
 *	LSM as a MAC label.
 *
 * @secid_to_secctx:
 *	Convert secid to security context.  If secdata is NULL the length of
 *	the result will be returned in seclen, but no secdata will be returned.
 *	This does mean that the length could change between calls to check the
 *	length and the next call which actually allocates and returns the
 *	secdata.
 *	@secid contains the security ID.
 *	@secdata contains the pointer that stores the converted security
 *	context.
 *	@seclen pointer which contains the length of the data
 * @secctx_to_secid:
 *	Convert security context to secid.
 *	@secid contains the pointer to the generated security ID.
 *	@secdata contains the security context.
 *
 * @release_secctx:
 *	Release the security context.
 *	@secdata contains the security context.
 *	@seclen contains the length of the security context.
 *
 * Security hooks for Audit
 *
 * @audit_rule_init:
 *	Allocate and initialize an LSM audit rule structure.
 *	@field contains the required Audit action.
 *	Fields flags are defined in include/linux/audit.h
 *	@op contains the operator the rule uses.
 *	@rulestr contains the context where the rule will be applied to.
 *	@lsmrule contains a pointer to receive the result.
 *	Return 0 if @lsmrule has been successfully set,
 *	-EINVAL in case of an invalid rule.
 *
 * @audit_rule_known:
 *	Specifies whether given @rule contains any fields related to
 *	current LSM.
 *	@rule contains the audit rule of interest.
 *	Return 1 in case of relation found, 0 otherwise.
 *
 * @audit_rule_match:
 *	Determine if given @secid matches a rule previously approved
 *	by @audit_rule_known.
 *	@secid contains the security id in question.
 *	@field contains the field which relates to current LSM.
 *	@op contains the operator that will be used for matching.
 *	@rule points to the audit rule that will be checked against.
 *	@actx points to the audit context associated with the check.
 *	Return 1 if secid matches the rule, 0 if it does not, -ERRNO on failure.
 *
 * @audit_rule_free:
 *	Deallocate the LSM audit rule structure previously allocated by
 *	audit_rule_init.
 *	@rule contains the allocated rule
 *
 * @inode_notifysecctx:
 *	Notify the security module of what the security context of an inode
 *	should be.  Initializes the incore security context managed by the
 *	security module for this inode.  Example usage:  NFS client invokes
 *	this hook to initialize the security context in its incore inode to the
 *	value provided by the server for the file when the server returned the
 *	file's attributes to the client.
 *
 *	Must be called with inode->i_mutex locked.
 *
 *	@inode we wish to set the security context of.
 *	@ctx contains the string which we wish to set in the inode.
 *	@ctxlen contains the length of @ctx.
 *
 * @inode_setsecctx:
 *	Change the security context of an inode.  Updates the
 *	incore security context managed by the security module and invokes the
 *	fs code as needed (via __vfs_setxattr_noperm) to update any backing
 *	xattrs that represent the context.  Example usage:  NFS server invokes
 *	this hook to change the security context in its incore inode and on the
 *	backing filesystem to a value provided by the client on a SETATTR
 *	operation.
 *
 *	Must be called with inode->i_mutex locked.
 *
 *	@dentry contains the inode we wish to set the security context of.
 *	@ctx contains the string which we wish to set in the inode.
 *	@ctxlen contains the length of @ctx.
 *
 * @inode_getsecctx:
 *	On success, returns 0 and fills out @ctx and @ctxlen with the security
 *	context for the given @inode.
 *
 *	@inode we wish to get the security context of.
 *	@ctx is a pointer in which to place the allocated security context.
 *	@ctxlen points to the place to put the length of @ctx.
 * This is the main security structure.
 */

union security_list_options {
	int (*binder_set_context_mgr)(struct task_struct *mgr);
	int (*binder_transaction)(struct task_struct *from,
					struct task_struct *to);
	int (*binder_transfer_binder)(struct task_struct *from,
					struct task_struct *to);
	int (*binder_transfer_file)(struct task_struct *from,
					struct task_struct *to,
					struct file *file);

	int (*ptrace_access_check)(struct task_struct *child,
					unsigned int mode);
	int (*ptrace_traceme)(struct task_struct *parent);
	int (*capget)(struct task_struct *target, kernel_cap_t *effective,
			kernel_cap_t *inheritable, kernel_cap_t *permitted);
	int (*capset)(struct cred *new, const struct cred *old,
			const kernel_cap_t *effective,
			const kernel_cap_t *inheritable,
			const kernel_cap_t *permitted);
	int (*capable)(const struct cred *cred, struct user_namespace *ns,
			int cap, int audit);
	int (*quotactl)(int cmds, int type, int id, struct super_block *sb);
	int (*quota_on)(struct dentry *dentry);
	int (*syslog)(int type);
	int (*settime)(const struct timespec *ts, const struct timezone *tz);
	int (*vm_enough_memory)(struct mm_struct *mm, long pages);

	int (*bprm_set_creds)(struct linux_binprm *bprm);
	int (*bprm_check_security)(struct linux_binprm *bprm);
	int (*bprm_secureexec)(struct linux_binprm *bprm);
	void (*bprm_committing_creds)(struct linux_binprm *bprm);
	void (*bprm_committed_creds)(struct linux_binprm *bprm);

	int (*sb_alloc_security)(struct super_block *sb);
	void (*sb_free_security)(struct super_block *sb);
	int (*sb_copy_data)(char *orig, char *copy);
	int (*sb_remount)(struct super_block *sb, void *data);
	int (*sb_kern_mount)(struct super_block *sb, int flags, void *data);
	int (*sb_show_options)(struct seq_file *m, struct super_block *sb);
	int (*sb_statfs)(struct dentry *dentry);
	int (*sb_mount)(const char *dev_name, struct path *path,
			const char *type, unsigned long flags, void *data);
	int (*sb_umount)(struct vfsmount *mnt, int flags);
	int (*sb_pivotroot)(struct path *old_path, struct path *new_path);
	int (*sb_set_mnt_opts)(struct super_block *sb,
				struct security_mnt_opts *opts,
				unsigned long kern_flags,
				unsigned long *set_kern_flags);
	int (*sb_clone_mnt_opts)(const struct super_block *oldsb,
					struct super_block *newsb);
	int (*sb_parse_opts_str)(char *options, struct security_mnt_opts *opts);
	int (*dentry_init_security)(struct dentry *dentry, int mode,
					struct qstr *name, void **ctx,
					u32 *ctxlen);


#ifdef CONFIG_SECURITY_PATH
	int (*path_unlink)(struct path *dir, struct dentry *dentry);
	int (*path_mkdir)(struct path *dir, struct dentry *dentry,
				umode_t mode);
	int (*path_rmdir)(struct path *dir, struct dentry *dentry);
	int (*path_mknod)(struct path *dir, struct dentry *dentry,
				umode_t mode, unsigned int dev);
	int (*path_truncate)(struct path *path);
	int (*path_symlink)(struct path *dir, struct dentry *dentry,
				const char *old_name);
	int (*path_link)(struct dentry *old_dentry, struct path *new_dir,
				struct dentry *new_dentry);
	int (*path_rename)(struct path *old_dir, struct dentry *old_dentry,
				struct path *new_dir,
				struct dentry *new_dentry);
	int (*path_chmod)(struct path *path, umode_t mode);
	int (*path_chown)(struct path *path, kuid_t uid, kgid_t gid);
	int (*path_chroot)(struct path *path);
#endif

	int (*inode_alloc_security)(struct inode *inode);
	void (*inode_free_security)(struct inode *inode);
	int (*inode_init_security)(struct inode *inode, struct inode *dir,
					const struct qstr *qstr,
					const char **name, void **value,
					size_t *len);
	int (*inode_create)(struct inode *dir, struct dentry *dentry,
				umode_t mode);
	int (*inode_link)(struct dentry *old_dentry, struct inode *dir,
				struct dentry *new_dentry);
	int (*inode_unlink)(struct inode *dir, struct dentry *dentry);
	int (*inode_symlink)(struct inode *dir, struct dentry *dentry,
				const char *old_name);
	int (*inode_mkdir)(struct inode *dir, struct dentry *dentry,
				umode_t mode);
	int (*inode_rmdir)(struct inode *dir, struct dentry *dentry);
	int (*inode_mknod)(struct inode *dir, struct dentry *dentry,
				umode_t mode, dev_t dev);
	int (*inode_rename)(struct inode *old_dir, struct dentry *old_dentry,
				struct inode *new_dir,
				struct dentry *new_dentry);
	int (*inode_readlink)(struct dentry *dentry);
	int (*inode_follow_link)(struct dentry *dentry, struct inode *inode,
				 bool rcu);
	int (*inode_permission)(struct inode *inode, int mask);
	int (*inode_setattr)(struct dentry *dentry, struct iattr *attr);
	int (*inode_getattr)(const struct path *path);
	int (*inode_setxattr)(struct dentry *dentry, const char *name,
				const void *value, size_t size, int flags);
	void (*inode_post_setxattr)(struct dentry *dentry, const char *name,
					const void *value, size_t size,
					int flags);
	int (*inode_getxattr)(struct dentry *dentry, const char *name);
	int (*inode_listxattr)(struct dentry *dentry);
	int (*inode_removexattr)(struct dentry *dentry, const char *name);
	int (*inode_need_killpriv)(struct dentry *dentry);
	int (*inode_killpriv)(struct dentry *dentry);
	int (*inode_getsecurity)(const struct inode *inode, const char *name,
					void **buffer, bool alloc);
	int (*inode_setsecurity)(struct inode *inode, const char *name,
					const void *value, size_t size,
					int flags);
	int (*inode_listsecurity)(struct inode *inode, char *buffer,
					size_t buffer_size);
	void (*inode_getsecid)(const struct inode *inode, u32 *secid);

	int (*file_permission)(struct file *file, int mask);
	int (*file_alloc_security)(struct file *file);
	void (*file_free_security)(struct file *file);
	int (*file_ioctl)(struct file *file, unsigned int cmd,
				unsigned long arg);
	int (*mmap_addr)(unsigned long addr);
	int (*mmap_file)(struct file *file, unsigned long reqprot,
				unsigned long prot, unsigned long flags);
	int (*file_mprotect)(struct vm_area_struct *vma, unsigned long reqprot,
				unsigned long prot);
	int (*file_lock)(struct file *file, unsigned int cmd);
	int (*file_fcntl)(struct file *file, unsigned int cmd,
				unsigned long arg);
	void (*file_set_fowner)(struct file *file);
	int (*file_send_sigiotask)(struct task_struct *tsk,
					struct fown_struct *fown, int sig);
	int (*file_receive)(struct file *file);
	int (*file_open)(struct file *file, const struct cred *cred);

	int (*task_create)(unsigned long clone_flags);
	void (*task_free)(struct task_struct *task);
	int (*cred_alloc_blank)(struct cred *cred, gfp_t gfp);
	void (*cred_free)(struct cred *cred);
	int (*cred_prepare)(struct cred *new, const struct cred *old,
				gfp_t gfp);
	void (*cred_transfer)(struct cred *new, const struct cred *old);
	int (*kernel_act_as)(struct cred *new, u32 secid);
	int (*kernel_create_files_as)(struct cred *new, struct inode *inode);
	int (*kernel_fw_from_file)(struct file *file, char *buf, size_t size);
	int (*kernel_module_request)(char *kmod_name);
	int (*kernel_module_from_file)(struct file *file);
	int (*task_fix_setuid)(struct cred *new, const struct cred *old,
				int flags);
	int (*task_setpgid)(struct task_struct *p, pid_t pgid);
	int (*task_getpgid)(struct task_struct *p);
	int (*task_getsid)(struct task_struct *p);
	void (*task_getsecid)(struct task_struct *p, u32 *secid);
	int (*task_setnice)(struct task_struct *p, int nice);
	int (*task_setioprio)(struct task_struct *p, int ioprio);
	int (*task_getioprio)(struct task_struct *p);
	int (*task_setrlimit)(struct task_struct *p, unsigned int resource,
				struct rlimit *new_rlim);
	int (*task_setscheduler)(struct task_struct *p);
	int (*task_getscheduler)(struct task_struct *p);
	int (*task_movememory)(struct task_struct *p);
	int (*task_kill)(struct task_struct *p, struct siginfo *info,
				int sig, u32 secid);
	int (*task_wait)(struct task_struct *p);
	int (*task_prctl)(int option, unsigned long arg2, unsigned long arg3,
				unsigned long arg4, unsigned long arg5);
	void (*task_to_inode)(struct task_struct *p, struct inode *inode);

	int (*ipc_permission)(struct kern_ipc_perm *ipcp, short flag);
	void (*ipc_getsecid)(struct kern_ipc_perm *ipcp, u32 *secid);

	int (*msg_msg_alloc_security)(struct msg_msg *msg);
	void (*msg_msg_free_security)(struct msg_msg *msg);

	int (*msg_queue_alloc_security)(struct msg_queue *msq);
	void (*msg_queue_free_security)(struct msg_queue *msq);
	int (*msg_queue_associate)(struct msg_queue *msq, int msqflg);
	int (*msg_queue_msgctl)(struct msg_queue *msq, int cmd);
	int (*msg_queue_msgsnd)(struct msg_queue *msq, struct msg_msg *msg,
				int msqflg);
	int (*msg_queue_msgrcv)(struct msg_queue *msq, struct msg_msg *msg,
				struct task_struct *target, long type,
				int mode);

	int (*shm_alloc_security)(struct shmid_kernel *shp);
	void (*shm_free_security)(struct shmid_kernel *shp);
	int (*shm_associate)(struct shmid_kernel *shp, int shmflg);
	int (*shm_shmctl)(struct shmid_kernel *shp, int cmd);
	int (*shm_shmat)(struct shmid_kernel *shp, char __user *shmaddr,
				int shmflg);

	int (*sem_alloc_security)(struct sem_array *sma);
	void (*sem_free_security)(struct sem_array *sma);
	int (*sem_associate)(struct sem_array *sma, int semflg);
	int (*sem_semctl)(struct sem_array *sma, int cmd);
	int (*sem_semop)(struct sem_array *sma, struct sembuf *sops,
				unsigned nsops, int alter);

	int (*netlink_send)(struct sock *sk, struct sk_buff *skb);

	void (*d_instantiate)(struct dentry *dentry, struct inode *inode);

	int (*getprocattr)(struct task_struct *p, char *name, char **value);
	int (*setprocattr)(struct task_struct *p, char *name, void *value,
				size_t size);
	int (*ismaclabel)(const char *name);
	int (*secid_to_secctx)(u32 secid, char **secdata, u32 *seclen);
	int (*secctx_to_secid)(const char *secdata, u32 seclen, u32 *secid);
	void (*release_secctx)(char *secdata, u32 seclen);

	int (*inode_notifysecctx)(struct inode *inode, void *ctx, u32 ctxlen);
	int (*inode_setsecctx)(struct dentry *dentry, void *ctx, u32 ctxlen);
	int (*inode_getsecctx)(struct inode *inode, void **ctx, u32 *ctxlen);

#ifdef CONFIG_SECURITY_NETWORK
	int (*unix_stream_connect)(struct sock *sock, struct sock *other,
					struct sock *newsk);
	int (*unix_may_send)(struct socket *sock, struct socket *other);

	int (*socket_create)(int family, int type, int protocol, int kern);
	int (*socket_post_create)(struct socket *sock, int family, int type,
					int protocol, int kern);
	int (*socket_bind)(struct socket *sock, struct sockaddr *address,
				int addrlen);
	int (*socket_connect)(struct socket *sock, struct sockaddr *address,
				int addrlen);
	int (*socket_listen)(struct socket *sock, int backlog);
	int (*socket_accept)(struct socket *sock, struct socket *newsock);
	int (*socket_sendmsg)(struct socket *sock, struct msghdr *msg,
				int size);
	int (*socket_recvmsg)(struct socket *sock, struct msghdr *msg,
				int size, int flags);
	int (*socket_getsockname)(struct socket *sock);
	int (*socket_getpeername)(struct socket *sock);
	int (*socket_getsockopt)(struct socket *sock, int level, int optname);
	int (*socket_setsockopt)(struct socket *sock, int level, int optname);
	int (*socket_shutdown)(struct socket *sock, int how);
	int (*socket_sock_rcv_skb)(struct sock *sk, struct sk_buff *skb);
	int (*socket_getpeersec_stream)(struct socket *sock,
					char __user *optval,
					int __user *optlen, unsigned len);
	int (*socket_getpeersec_dgram)(struct socket *sock,
					struct sk_buff *skb, u32 *secid);
	int (*sk_alloc_security)(struct sock *sk, int family, gfp_t priority);
	void (*sk_free_security)(struct sock *sk);
	void (*sk_clone_security)(const struct sock *sk, struct sock *newsk);
	void (*sk_getsecid)(struct sock *sk, u32 *secid);
	void (*sock_graft)(struct sock *sk, struct socket *parent);
	int (*inet_conn_request)(struct sock *sk, struct sk_buff *skb,
					struct request_sock *req);
	void (*inet_csk_clone)(struct sock *newsk,
				const struct request_sock *req);
	void (*inet_conn_established)(struct sock *sk, struct sk_buff *skb);
	int (*secmark_relabel_packet)(u32 secid);
	void (*secmark_refcount_inc)(void);
	void (*secmark_refcount_dec)(void);
	void (*req_classify_flow)(const struct request_sock *req,
					struct flowi *fl);
	int (*tun_dev_alloc_security)(void **security);
	void (*tun_dev_free_security)(void *security);
	int (*tun_dev_create)(void);
	int (*tun_dev_attach_queue)(void *security);
	int (*tun_dev_attach)(struct sock *sk, void *security);
	int (*tun_dev_open)(void *security);
#endif	/* CONFIG_SECURITY_NETWORK */

#ifdef CONFIG_SECURITY_NETWORK_XFRM
	int (*xfrm_policy_alloc_security)(struct xfrm_sec_ctx **ctxp,
					  struct xfrm_user_sec_ctx *sec_ctx,
						gfp_t gfp);
	int (*xfrm_policy_clone_security)(struct xfrm_sec_ctx *old_ctx,
						struct xfrm_sec_ctx **new_ctx);
	void (*xfrm_policy_free_security)(struct xfrm_sec_ctx *ctx);
	int (*xfrm_policy_delete_security)(struct xfrm_sec_ctx *ctx);
	int (*xfrm_state_alloc)(struct xfrm_state *x,
				struct xfrm_user_sec_ctx *sec_ctx);
	int (*xfrm_state_alloc_acquire)(struct xfrm_state *x,
					struct xfrm_sec_ctx *polsec,
					u32 secid);
	void (*xfrm_state_free_security)(struct xfrm_state *x);
	int (*xfrm_state_delete_security)(struct xfrm_state *x);
	int (*xfrm_policy_lookup)(struct xfrm_sec_ctx *ctx, u32 fl_secid,
					u8 dir);
	int (*xfrm_state_pol_flow_match)(struct xfrm_state *x,
						struct xfrm_policy *xp,
						const struct flowi *fl);
	int (*xfrm_decode_session)(struct sk_buff *skb, u32 *secid, int ckall);
#endif	/* CONFIG_SECURITY_NETWORK_XFRM */

	/* key management security hooks */
#ifdef CONFIG_KEYS
	int (*key_alloc)(struct key *key, const struct cred *cred,
				unsigned long flags);
	void (*key_free)(struct key *key);
	int (*key_permission)(key_ref_t key_ref, const struct cred *cred,
				unsigned perm);
	int (*key_getsecurity)(struct key *key, char **_buffer);
#endif	/* CONFIG_KEYS */

#ifdef CONFIG_AUDIT
	int (*audit_rule_init)(u32 field, u32 op, char *rulestr,
				void **lsmrule);
	int (*audit_rule_known)(struct audit_krule *krule);
	int (*audit_rule_match)(u32 secid, u32 field, u32 op, void *lsmrule,
				struct audit_context *actx);
	void (*audit_rule_free)(void *lsmrule);
#endif /* CONFIG_AUDIT */
};

struct security_hook_heads {
	struct list_head binder_set_context_mgr;
	struct list_head binder_transaction;
	struct list_head binder_transfer_binder;
	struct list_head binder_transfer_file;
	struct list_head ptrace_access_check;
	struct list_head ptrace_traceme;
	struct list_head capget;
	struct list_head capset;
	struct list_head capable;
	struct list_head quotactl;
	struct list_head quota_on;
	struct list_head syslog;
	struct list_head settime;
	struct list_head vm_enough_memory;
	struct list_head bprm_set_creds;
	struct list_head bprm_check_security;
	struct list_head bprm_secureexec;
	struct list_head bprm_committing_creds;
	struct list_head bprm_committed_creds;
	struct list_head sb_alloc_security;
	struct list_head sb_free_security;
	struct list_head sb_copy_data;
	struct list_head sb_remount;
	struct list_head sb_kern_mount;
	struct list_head sb_show_options;
	struct list_head sb_statfs;
	struct list_head sb_mount;
	struct list_head sb_umount;
	struct list_head sb_pivotroot;
	struct list_head sb_set_mnt_opts;
	struct list_head sb_clone_mnt_opts;
	struct list_head sb_parse_opts_str;
	struct list_head dentry_init_security;
#ifdef CONFIG_SECURITY_PATH
	struct list_head path_unlink;
	struct list_head path_mkdir;
	struct list_head path_rmdir;
	struct list_head path_mknod;
	struct list_head path_truncate;
	struct list_head path_symlink;
	struct list_head path_link;
	struct list_head path_rename;
	struct list_head path_chmod;
	struct list_head path_chown;
	struct list_head path_chroot;
#endif
	struct list_head inode_alloc_security;
	struct list_head inode_free_security;
	struct list_head inode_init_security;
	struct list_head inode_create;
	struct list_head inode_link;
	struct list_head inode_unlink;
	struct list_head inode_symlink;
	struct list_head inode_mkdir;
	struct list_head inode_rmdir;
	struct list_head inode_mknod;
	struct list_head inode_rename;
	struct list_head inode_readlink;
	struct list_head inode_follow_link;
	struct list_head inode_permission;
	struct list_head inode_setattr;
	struct list_head inode_getattr;
	struct list_head inode_setxattr;
	struct list_head inode_post_setxattr;
	struct list_head inode_getxattr;
	struct list_head inode_listxattr;
	struct list_head inode_removexattr;
	struct list_head inode_need_killpriv;
	struct list_head inode_killpriv;
	struct list_head inode_getsecurity;
	struct list_head inode_setsecurity;
	struct list_head inode_listsecurity;
	struct list_head inode_getsecid;
	struct list_head file_permission;
	struct list_head file_alloc_security;
	struct list_head file_free_security;
	struct list_head file_ioctl;
	struct list_head mmap_addr;
	struct list_head mmap_file;
	struct list_head file_mprotect;
	struct list_head file_lock;
	struct list_head file_fcntl;
	struct list_head file_set_fowner;
	struct list_head file_send_sigiotask;
	struct list_head file_receive;
	struct list_head file_open;
	struct list_head task_create;
	struct list_head task_free;
	struct list_head cred_alloc_blank;
	struct list_head cred_free;
	struct list_head cred_prepare;
	struct list_head cred_transfer;
	struct list_head kernel_act_as;
	struct list_head kernel_create_files_as;
	struct list_head kernel_fw_from_file;
	struct list_head kernel_module_request;
	struct list_head kernel_module_from_file;
	struct list_head task_fix_setuid;
	struct list_head task_setpgid;
	struct list_head task_getpgid;
	struct list_head task_getsid;
	struct list_head task_getsecid;
	struct list_head task_setnice;
	struct list_head task_setioprio;
	struct list_head task_getioprio;
	struct list_head task_setrlimit;
	struct list_head task_setscheduler;
	struct list_head task_getscheduler;
	struct list_head task_movememory;
	struct list_head task_kill;
	struct list_head task_wait;
	struct list_head task_prctl;
	struct list_head task_to_inode;
	struct list_head ipc_permission;
	struct list_head ipc_getsecid;
	struct list_head msg_msg_alloc_security;
	struct list_head msg_msg_free_security;
	struct list_head msg_queue_alloc_security;
	struct list_head msg_queue_free_security;
	struct list_head msg_queue_associate;
	struct list_head msg_queue_msgctl;
	struct list_head msg_queue_msgsnd;
	struct list_head msg_queue_msgrcv;
	struct list_head shm_alloc_security;
	struct list_head shm_free_security;
	struct list_head shm_associate;
	struct list_head shm_shmctl;
	struct list_head shm_shmat;
	struct list_head sem_alloc_security;
	struct list_head sem_free_security;
	struct list_head sem_associate;
	struct list_head sem_semctl;
	struct list_head sem_semop;
	struct list_head netlink_send;
	struct list_head d_instantiate;
	struct list_head getprocattr;
	struct list_head setprocattr;
	struct list_head ismaclabel;
	struct list_head secid_to_secctx;
	struct list_head secctx_to_secid;
	struct list_head release_secctx;
	struct list_head inode_notifysecctx;
	struct list_head inode_setsecctx;
	struct list_head inode_getsecctx;
#ifdef CONFIG_SECURITY_NETWORK
	struct list_head unix_stream_connect;
	struct list_head unix_may_send;
	struct list_head socket_create;
	struct list_head socket_post_create;
	struct list_head socket_bind;
	struct list_head socket_connect;
	struct list_head socket_listen;
	struct list_head socket_accept;
	struct list_head socket_sendmsg;
	struct list_head socket_recvmsg;
	struct list_head socket_getsockname;
	struct list_head socket_getpeername;
	struct list_head socket_getsockopt;
	struct list_head socket_setsockopt;
	struct list_head socket_shutdown;
	struct list_head socket_sock_rcv_skb;
	struct list_head socket_getpeersec_stream;
	struct list_head socket_getpeersec_dgram;
	struct list_head sk_alloc_security;
	struct list_head sk_free_security;
	struct list_head sk_clone_security;
	struct list_head sk_getsecid;
	struct list_head sock_graft;
	struct list_head inet_conn_request;
	struct list_head inet_csk_clone;
	struct list_head inet_conn_established;
	struct list_head secmark_relabel_packet;
	struct list_head secmark_refcount_inc;
	struct list_head secmark_refcount_dec;
	struct list_head req_classify_flow;
	struct list_head tun_dev_alloc_security;
	struct list_head tun_dev_free_security;
	struct list_head tun_dev_create;
	struct list_head tun_dev_attach_queue;
	struct list_head tun_dev_attach;
	struct list_head tun_dev_open;
	struct list_head skb_owned_by;
#endif	/* CONFIG_SECURITY_NETWORK */
#ifdef CONFIG_SECURITY_NETWORK_XFRM
	struct list_head xfrm_policy_alloc_security;
	struct list_head xfrm_policy_clone_security;
	struct list_head xfrm_policy_free_security;
	struct list_head xfrm_policy_delete_security;
	struct list_head xfrm_state_alloc;
	struct list_head xfrm_state_alloc_acquire;
	struct list_head xfrm_state_free_security;
	struct list_head xfrm_state_delete_security;
	struct list_head xfrm_policy_lookup;
	struct list_head xfrm_state_pol_flow_match;
	struct list_head xfrm_decode_session;
#endif	/* CONFIG_SECURITY_NETWORK_XFRM */
#ifdef CONFIG_KEYS
	struct list_head key_alloc;
	struct list_head key_free;
	struct list_head key_permission;
	struct list_head key_getsecurity;
#endif	/* CONFIG_KEYS */
#ifdef CONFIG_AUDIT
	struct list_head audit_rule_init;
	struct list_head audit_rule_known;
	struct list_head audit_rule_match;
	struct list_head audit_rule_free;
#endif /* CONFIG_AUDIT */
};

/*
 * Security module hook list structure.
 * For use with generic list macros for common operations.
 */
struct security_hook_list {
	struct list_head		list;
	struct list_head		*head;
	union security_list_options	hook;
};

/*
 * Initializing a security_hook_list structure takes
 * up a lot of space in a source file. This macro takes
 * care of the common case and reduces the amount of
 * text involved.
 */
#define LSM_HOOK_INIT(HEAD, HOOK) \
	{ .head = &security_hook_heads.HEAD, .hook = { .HEAD = HOOK } }

extern struct security_hook_heads security_hook_heads;

static inline void security_add_hooks(struct security_hook_list *hooks,
				      int count)
{
	int i;

	for (i = 0; i < count; i++)
		list_add_tail_rcu(&hooks[i].list, hooks[i].head);
}

#ifdef CONFIG_SECURITY_SELINUX_DISABLE
/*
 * Assuring the safety of deleting a security module is up to
 * the security module involved. This may entail ordering the
 * module's hook list in a particular way, refusing to disable
 * the module once a policy is loaded or any number of other
 * actions better imagined than described.
 *
 * The name of the configuration option reflects the only module
 * that currently uses the mechanism. Any developer who thinks
 * disabling their module is a good idea needs to be at least as
 * careful as the SELinux team.
 */
static inline void security_delete_hooks(struct security_hook_list *hooks,
						int count)
{
	int i;

	for (i = 0; i < count; i++)
		list_del_rcu(&hooks[i].list);
}
#endif /* CONFIG_SECURITY_SELINUX_DISABLE */

extern int __init security_module_enable(const char *module);
extern void __init capability_add_hooks(void);
#ifdef CONFIG_SECURITY_YAMA
extern void __init yama_add_hooks(void);
#else
static inline void __init yama_add_hooks(void) { }
#endif

#endif /* ! __LINUX_LSM_HOOKS_H */