include/linux/audit.h

   1 /* audit.h -- Auditing support
   2  *
   3  * Copyright 2003-2004 Red Hat Inc., Durham, North Carolina.
   4  * All Rights Reserved.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  * Written by Rickard E. (Rik) Faith <faith@redhat.com>
  21  *
  22  */
  23
  24 #ifndef _LINUX_AUDIT_H_
  25 #define _LINUX_AUDIT_H_
  26
  27 #include <linux/types.h>
  28 #include <linux/elf-em.h>
  29 #include <linux/ptrace.h>
  30
  31 /* The netlink messages for the audit system is divided into blocks:
  32  * 1000 - 1099 are for commanding the audit system
  33  * 1100 - 1199 user space trusted application messages
  34  * 1200 - 1299 messages internal to the audit daemon
  35  * 1300 - 1399 audit event messages
  36  * 1400 - 1499 SE Linux use
  37  * 1500 - 1599 kernel LSPP events
  38  * 1600 - 1699 kernel crypto events
  39  * 1700 - 1799 kernel anomaly records
  40  * 1800 - 1899 kernel integrity events
  41  * 1900 - 1999 future kernel use
  42  * 2000 is for otherwise unclassified kernel audit messages (legacy)
  43  * 2001 - 2099 unused (kernel)
  44  * 2100 - 2199 user space anomaly records
  45  * 2200 - 2299 user space actions taken in response to anomalies
  46  * 2300 - 2399 user space generated LSPP events
  47  * 2400 - 2499 user space crypto events
  48  * 2500 - 2999 future user space (maybe integrity labels and related events)
  49  *
  50  * Messages from 1000-1199 are bi-directional. 1200-1299 & 2100 - 2999 are
  51  * exclusively user space. 1300-2099 is kernel --> user space
  52  * communication.
  53  */
  54 #define AUDIT_GET               1000    /* Get status */
  55 #define AUDIT_SET               1001    /* Set status (enable/disable/auditd) */
  56 #define AUDIT_LIST              1002    /* List syscall rules -- deprecated */
  57 #define AUDIT_ADD               1003    /* Add syscall rule -- deprecated */
  58 #define AUDIT_DEL               1004    /* Delete syscall rule -- deprecated */
  59 #define AUDIT_USER              1005    /* Message from userspace -- deprecated */
  60 #define AUDIT_LOGIN             1006    /* Define the login id and information */
  61 #define AUDIT_WATCH_INS         1007    /* Insert file/dir watch entry */
  62 #define AUDIT_WATCH_REM         1008    /* Remove file/dir watch entry */
  63 #define AUDIT_WATCH_LIST        1009    /* List all file/dir watches */
  64 #define AUDIT_SIGNAL_INFO       1010    /* Get info about sender of signal to auditd */
  65 #define AUDIT_ADD_RULE          1011    /* Add syscall filtering rule */
  66 #define AUDIT_DEL_RULE          1012    /* Delete syscall filtering rule */
  67 #define AUDIT_LIST_RULES        1013    /* List syscall filtering rules */
  68 #define AUDIT_TRIM              1014    /* Trim junk from watched tree */
  69 #define AUDIT_MAKE_EQUIV        1015    /* Append to watched tree */
  70 #define AUDIT_TTY_GET           1016    /* Get TTY auditing status */
  71 #define AUDIT_TTY_SET           1017    /* Set TTY auditing status */
  72
  73 #define AUDIT_FIRST_USER_MSG    1100    /* Userspace messages mostly uninteresting to kernel */
  74 #define AUDIT_USER_AVC          1107    /* We filter this differently */
  75 #define AUDIT_USER_TTY          1124    /* Non-ICANON TTY input meaning */
  76 #define AUDIT_LAST_USER_MSG     1199
  77 #define AUDIT_FIRST_USER_MSG2   2100    /* More user space messages */
  78 #define AUDIT_LAST_USER_MSG2    2999
  79
  80 #define AUDIT_DAEMON_START      1200    /* Daemon startup record */
  81 #define AUDIT_DAEMON_END        1201    /* Daemon normal stop record */
  82 #define AUDIT_DAEMON_ABORT      1202    /* Daemon error stop record */
  83 #define AUDIT_DAEMON_CONFIG     1203    /* Daemon config change */
  84
  85 #define AUDIT_SYSCALL           1300    /* Syscall event */
  86 /* #define AUDIT_FS_WATCH       1301     * Deprecated */
  87 #define AUDIT_PATH              1302    /* Filename path information */
  88 #define AUDIT_IPC               1303    /* IPC record */
  89 #define AUDIT_SOCKETCALL        1304    /* sys_socketcall arguments */
  90 #define AUDIT_CONFIG_CHANGE     1305    /* Audit system configuration change */
  91 #define AUDIT_SOCKADDR          1306    /* sockaddr copied as syscall arg */
  92 #define AUDIT_CWD               1307    /* Current working directory */
  93 #define AUDIT_EXECVE            1309    /* execve arguments */
  94 #define AUDIT_IPC_SET_PERM      1311    /* IPC new permissions record type */
  95 #define AUDIT_MQ_OPEN           1312    /* POSIX MQ open record type */
  96 #define AUDIT_MQ_SENDRECV       1313    /* POSIX MQ send/receive record type */
  97 #define AUDIT_MQ_NOTIFY         1314    /* POSIX MQ notify record type */
  98 #define AUDIT_MQ_GETSETATTR     1315    /* POSIX MQ get/set attribute record type */
  99 #define AUDIT_KERNEL_OTHER      1316    /* For use by 3rd party modules */
 100 #define AUDIT_FD_PAIR           1317    /* audit record for pipe/socketpair */
 101 #define AUDIT_OBJ_PID           1318    /* ptrace target */
 102 #define AUDIT_TTY               1319    /* Input on an administrative TTY */
 103 #define AUDIT_EOE               1320    /* End of multi-record event */
 104 #define AUDIT_BPRM_FCAPS        1321    /* Information about fcaps increasing perms */
 105 #define AUDIT_CAPSET            1322    /* Record showing argument to sys_capset */
 106 #define AUDIT_MMAP              1323    /* Record showing descriptor and flags in mmap */
 107 #define AUDIT_NETFILTER_PKT     1324    /* Packets traversing netfilter chains */
 108 #define AUDIT_NETFILTER_CFG     1325    /* Netfilter chain modifications */
 109
 110 #define AUDIT_AVC               1400    /* SE Linux avc denial or grant */
 111 #define AUDIT_SELINUX_ERR       1401    /* Internal SE Linux Errors */
 112 #define AUDIT_AVC_PATH          1402    /* dentry, vfsmount pair from avc */
 113 #define AUDIT_MAC_POLICY_LOAD   1403    /* Policy file load */
 114 #define AUDIT_MAC_STATUS        1404    /* Changed enforcing,permissive,off */
 115 #define AUDIT_MAC_CONFIG_CHANGE 1405    /* Changes to booleans */
 116 #define AUDIT_MAC_UNLBL_ALLOW   1406    /* NetLabel: allow unlabeled traffic */
 117 #define AUDIT_MAC_CIPSOV4_ADD   1407    /* NetLabel: add CIPSOv4 DOI entry */
 118 #define AUDIT_MAC_CIPSOV4_DEL   1408    /* NetLabel: del CIPSOv4 DOI entry */
 119 #define AUDIT_MAC_MAP_ADD       1409    /* NetLabel: add LSM domain mapping */
 120 #define AUDIT_MAC_MAP_DEL       1410    /* NetLabel: del LSM domain mapping */
 121 #define AUDIT_MAC_IPSEC_ADDSA   1411    /* Not used */
 122 #define AUDIT_MAC_IPSEC_DELSA   1412    /* Not used  */
 123 #define AUDIT_MAC_IPSEC_ADDSPD  1413    /* Not used */
 124 #define AUDIT_MAC_IPSEC_DELSPD  1414    /* Not used */
 125 #define AUDIT_MAC_IPSEC_EVENT   1415    /* Audit an IPSec event */
 126 #define AUDIT_MAC_UNLBL_STCADD  1416    /* NetLabel: add a static label */
 127 #define AUDIT_MAC_UNLBL_STCDEL  1417    /* NetLabel: del a static label */
 128
 129 #define AUDIT_FIRST_KERN_ANOM_MSG   1700
 130 #define AUDIT_LAST_KERN_ANOM_MSG    1799
 131 #define AUDIT_ANOM_PROMISCUOUS      1700 /* Device changed promiscuous mode */
 132 #define AUDIT_ANOM_ABEND            1701 /* Process ended abnormally */
 133 #define AUDIT_ANOM_LINK             1702 /* Suspicious use of file links */
 134 #define AUDIT_INTEGRITY_DATA        1800 /* Data integrity verification */
 135 #define AUDIT_INTEGRITY_METADATA    1801 /* Metadata integrity verification */
 136 #define AUDIT_INTEGRITY_STATUS      1802 /* Integrity enable status */
 137 #define AUDIT_INTEGRITY_HASH        1803 /* Integrity HASH type */
 138 #define AUDIT_INTEGRITY_PCR         1804 /* PCR invalidation msgs */
 139 #define AUDIT_INTEGRITY_RULE        1805 /* policy rule */
 140
 141 #define AUDIT_KERNEL            2000    /* Asynchronous audit record. NOT A REQUEST. */
 142
 143 /* Rule flags */
 144 #define AUDIT_FILTER_USER       0x00    /* Apply rule to user-generated messages */
 145 #define AUDIT_FILTER_TASK       0x01    /* Apply rule at task creation (not syscall) */
 146 #define AUDIT_FILTER_ENTRY      0x02    /* Apply rule at syscall entry */
 147 #define AUDIT_FILTER_WATCH      0x03    /* Apply rule to file system watches */
 148 #define AUDIT_FILTER_EXIT       0x04    /* Apply rule at syscall exit */
 149 #define AUDIT_FILTER_TYPE       0x05    /* Apply rule at audit_log_start */
 150
 151 #define AUDIT_NR_FILTERS        6
 152
 153 #define AUDIT_FILTER_PREPEND    0x10    /* Prepend to front of list */
 154
 155 /* Rule actions */
 156 #define AUDIT_NEVER    0        /* Do not build context if rule matches */
 157 #define AUDIT_POSSIBLE 1        /* Build context if rule matches  */
 158 #define AUDIT_ALWAYS   2        /* Generate audit record if rule matches */
 159
 160 /* Rule structure sizes -- if these change, different AUDIT_ADD and
 161  * AUDIT_LIST commands must be implemented. */
 162 #define AUDIT_MAX_FIELDS   64
 163 #define AUDIT_MAX_KEY_LEN  256
 164 #define AUDIT_BITMASK_SIZE 64
 165 #define AUDIT_WORD(nr) ((__u32)((nr)/32))
 166 #define AUDIT_BIT(nr)  (1 << ((nr) - AUDIT_WORD(nr)*32))
 167
 168 #define AUDIT_SYSCALL_CLASSES 16
 169 #define AUDIT_CLASS_DIR_WRITE 0
 170 #define AUDIT_CLASS_DIR_WRITE_32 1
 171 #define AUDIT_CLASS_CHATTR 2
 172 #define AUDIT_CLASS_CHATTR_32 3
 173 #define AUDIT_CLASS_READ 4
 174 #define AUDIT_CLASS_READ_32 5
 175 #define AUDIT_CLASS_WRITE 6
 176 #define AUDIT_CLASS_WRITE_32 7
 177 #define AUDIT_CLASS_SIGNAL 8
 178 #define AUDIT_CLASS_SIGNAL_32 9
 179
 180 /* This bitmask is used to validate user input.  It represents all bits that
 181  * are currently used in an audit field constant understood by the kernel.
 182  * If you are adding a new #define AUDIT_<whatever>, please ensure that
 183  * AUDIT_UNUSED_BITS is updated if need be. */
 184 #define AUDIT_UNUSED_BITS       0x07FFFC00
 185
 186 /* AUDIT_FIELD_COMPARE rule list */
 187 #define AUDIT_COMPARE_UID_TO_OBJ_UID    1
 188 #define AUDIT_COMPARE_GID_TO_OBJ_GID    2
 189 #define AUDIT_COMPARE_EUID_TO_OBJ_UID   3
 190 #define AUDIT_COMPARE_EGID_TO_OBJ_GID   4
 191 #define AUDIT_COMPARE_AUID_TO_OBJ_UID   5
 192 #define AUDIT_COMPARE_SUID_TO_OBJ_UID   6
 193 #define AUDIT_COMPARE_SGID_TO_OBJ_GID   7
 194 #define AUDIT_COMPARE_FSUID_TO_OBJ_UID  8
 195 #define AUDIT_COMPARE_FSGID_TO_OBJ_GID  9
 196
 197 #define AUDIT_COMPARE_UID_TO_AUID       10
 198 #define AUDIT_COMPARE_UID_TO_EUID       11
 199 #define AUDIT_COMPARE_UID_TO_FSUID      12
 200 #define AUDIT_COMPARE_UID_TO_SUID       13
 201
 202 #define AUDIT_COMPARE_AUID_TO_FSUID     14
 203 #define AUDIT_COMPARE_AUID_TO_SUID      15
 204 #define AUDIT_COMPARE_AUID_TO_EUID      16
 205
 206 #define AUDIT_COMPARE_EUID_TO_SUID      17
 207 #define AUDIT_COMPARE_EUID_TO_FSUID     18
 208
 209 #define AUDIT_COMPARE_SUID_TO_FSUID     19
 210
 211 #define AUDIT_COMPARE_GID_TO_EGID       20
 212 #define AUDIT_COMPARE_GID_TO_FSGID      21
 213 #define AUDIT_COMPARE_GID_TO_SGID       22
 214
 215 #define AUDIT_COMPARE_EGID_TO_FSGID     23
 216 #define AUDIT_COMPARE_EGID_TO_SGID      24
 217 #define AUDIT_COMPARE_SGID_TO_FSGID     25
 218
 219 #define AUDIT_MAX_FIELD_COMPARE         AUDIT_COMPARE_SGID_TO_FSGID
 220
 221 /* Rule fields */
 222                                 /* These are useful when checking the
 223                                  * task structure at task creation time
 224                                  * (AUDIT_PER_TASK).  */
 225 #define AUDIT_PID       0
 226 #define AUDIT_UID       1
 227 #define AUDIT_EUID      2
 228 #define AUDIT_SUID      3
 229 #define AUDIT_FSUID     4
 230 #define AUDIT_GID       5
 231 #define AUDIT_EGID      6
 232 #define AUDIT_SGID      7
 233 #define AUDIT_FSGID     8
 234 #define AUDIT_LOGINUID  9
 235 #define AUDIT_PERS      10
 236 #define AUDIT_ARCH      11
 237 #define AUDIT_MSGTYPE   12
 238 #define AUDIT_SUBJ_USER 13      /* security label user */
 239 #define AUDIT_SUBJ_ROLE 14      /* security label role */
 240 #define AUDIT_SUBJ_TYPE 15      /* security label type */
 241 #define AUDIT_SUBJ_SEN  16      /* security label sensitivity label */
 242 #define AUDIT_SUBJ_CLR  17      /* security label clearance label */
 243 #define AUDIT_PPID      18
 244 #define AUDIT_OBJ_USER  19
 245 #define AUDIT_OBJ_ROLE  20
 246 #define AUDIT_OBJ_TYPE  21
 247 #define AUDIT_OBJ_LEV_LOW       22
 248 #define AUDIT_OBJ_LEV_HIGH      23
 249
 250                                 /* These are ONLY useful when checking
 251                                  * at syscall exit time (AUDIT_AT_EXIT). */
 252 #define AUDIT_DEVMAJOR  100
 253 #define AUDIT_DEVMINOR  101
 254 #define AUDIT_INODE     102
 255 #define AUDIT_EXIT      103
 256 #define AUDIT_SUCCESS   104     /* exit >= 0; value ignored */
 257 #define AUDIT_WATCH     105
 258 #define AUDIT_PERM      106
 259 #define AUDIT_DIR       107
 260 #define AUDIT_FILETYPE  108
 261 #define AUDIT_OBJ_UID   109
 262 #define AUDIT_OBJ_GID   110
 263 #define AUDIT_FIELD_COMPARE     111
 264
 265 #define AUDIT_ARG0      200
 266 #define AUDIT_ARG1      (AUDIT_ARG0+1)
 267 #define AUDIT_ARG2      (AUDIT_ARG0+2)
 268 #define AUDIT_ARG3      (AUDIT_ARG0+3)
 269
 270 #define AUDIT_FILTERKEY 210
 271
 272 #define AUDIT_NEGATE                    0x80000000
 273
 274 /* These are the supported operators.
 275  *      4  2  1  8
 276  *      =  >  <  ?
 277  *      ----------
 278  *      0  0  0  0      00      nonsense
 279  *      0  0  0  1      08      &  bit mask
 280  *      0  0  1  0      10      <
 281  *      0  1  0  0      20      >
 282  *      0  1  1  0      30      !=
 283  *      1  0  0  0      40      =
 284  *      1  0  0  1      48      &=  bit test
 285  *      1  0  1  0      50      <=
 286  *      1  1  0  0      60      >=
 287  *      1  1  1  1      78      all operators
 288  */
 289 #define AUDIT_BIT_MASK                  0x08000000
 290 #define AUDIT_LESS_THAN                 0x10000000
 291 #define AUDIT_GREATER_THAN              0x20000000
 292 #define AUDIT_NOT_EQUAL                 0x30000000
 293 #define AUDIT_EQUAL                     0x40000000
 294 #define AUDIT_BIT_TEST                  (AUDIT_BIT_MASK|AUDIT_EQUAL)
 295 #define AUDIT_LESS_THAN_OR_EQUAL        (AUDIT_LESS_THAN|AUDIT_EQUAL)
 296 #define AUDIT_GREATER_THAN_OR_EQUAL     (AUDIT_GREATER_THAN|AUDIT_EQUAL)
 297 #define AUDIT_OPERATORS                 (AUDIT_EQUAL|AUDIT_NOT_EQUAL|AUDIT_BIT_MASK)
 298
 299 enum {
 300         Audit_equal,
 301         Audit_not_equal,
 302         Audit_bitmask,
 303         Audit_bittest,
 304         Audit_lt,
 305         Audit_gt,
 306         Audit_le,
 307         Audit_ge,
 308         Audit_bad
 309 };
 310
 311 /* Status symbols */
 312                                 /* Mask values */
 313 #define AUDIT_STATUS_ENABLED            0x0001
 314 #define AUDIT_STATUS_FAILURE            0x0002
 315 #define AUDIT_STATUS_PID                0x0004
 316 #define AUDIT_STATUS_RATE_LIMIT         0x0008
 317 #define AUDIT_STATUS_BACKLOG_LIMIT      0x0010
 318                                 /* Failure-to-log actions */
 319 #define AUDIT_FAIL_SILENT       0
 320 #define AUDIT_FAIL_PRINTK       1
 321 #define AUDIT_FAIL_PANIC        2
 322
 323 /* distinguish syscall tables */
 324 #define __AUDIT_ARCH_64BIT 0x80000000
 325 #define __AUDIT_ARCH_LE    0x40000000
 326 #define AUDIT_ARCH_ALPHA        (EM_ALPHA|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
 327 #define AUDIT_ARCH_ARM          (EM_ARM|__AUDIT_ARCH_LE)
 328 #define AUDIT_ARCH_ARMEB        (EM_ARM)
 329 #define AUDIT_ARCH_CRIS         (EM_CRIS|__AUDIT_ARCH_LE)
 330 #define AUDIT_ARCH_FRV          (EM_FRV)
 331 #define AUDIT_ARCH_H8300        (EM_H8_300)
 332 #define AUDIT_ARCH_I386         (EM_386|__AUDIT_ARCH_LE)
 333 #define AUDIT_ARCH_IA64         (EM_IA_64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
 334 #define AUDIT_ARCH_M32R         (EM_M32R)
 335 #define AUDIT_ARCH_M68K         (EM_68K)
 336 #define AUDIT_ARCH_MIPS         (EM_MIPS)
 337 #define AUDIT_ARCH_MIPSEL       (EM_MIPS|__AUDIT_ARCH_LE)
 338 #define AUDIT_ARCH_MIPS64       (EM_MIPS|__AUDIT_ARCH_64BIT)
 339 #define AUDIT_ARCH_MIPSEL64     (EM_MIPS|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
 340 #define AUDIT_ARCH_PARISC       (EM_PARISC)
 341 #define AUDIT_ARCH_PARISC64     (EM_PARISC|__AUDIT_ARCH_64BIT)
 342 #define AUDIT_ARCH_PPC          (EM_PPC)
 343 #define AUDIT_ARCH_PPC64        (EM_PPC64|__AUDIT_ARCH_64BIT)
 344 #define AUDIT_ARCH_S390         (EM_S390)
 345 #define AUDIT_ARCH_S390X        (EM_S390|__AUDIT_ARCH_64BIT)
 346 #define AUDIT_ARCH_SH           (EM_SH)
 347 #define AUDIT_ARCH_SHEL         (EM_SH|__AUDIT_ARCH_LE)
 348 #define AUDIT_ARCH_SH64         (EM_SH|__AUDIT_ARCH_64BIT)
 349 #define AUDIT_ARCH_SHEL64       (EM_SH|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
 350 #define AUDIT_ARCH_SPARC        (EM_SPARC)
 351 #define AUDIT_ARCH_SPARC64      (EM_SPARCV9|__AUDIT_ARCH_64BIT)
 352 #define AUDIT_ARCH_X86_64       (EM_X86_64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
 353
 354 #define AUDIT_PERM_EXEC         1
 355 #define AUDIT_PERM_WRITE        2
 356 #define AUDIT_PERM_READ         4
 357 #define AUDIT_PERM_ATTR         8
 358
 359 struct audit_status {
 360         __u32           mask;           /* Bit mask for valid entries */
 361         __u32           enabled;        /* 1 = enabled, 0 = disabled */
 362         __u32           failure;        /* Failure-to-log action */
 363         __u32           pid;            /* pid of auditd process */
 364         __u32           rate_limit;     /* messages rate limit (per second) */
 365         __u32           backlog_limit;  /* waiting messages limit */
 366         __u32           lost;           /* messages lost */
 367         __u32           backlog;        /* messages waiting in queue */
 368 };
 369
 370 struct audit_tty_status {
 371         __u32           enabled; /* 1 = enabled, 0 = disabled */
 372 };
 373
 374 /* audit_rule_data supports filter rules with both integer and string
 375  * fields.  It corresponds with AUDIT_ADD_RULE, AUDIT_DEL_RULE and
 376  * AUDIT_LIST_RULES requests.
 377  */
 378 struct audit_rule_data {
 379         __u32           flags;  /* AUDIT_PER_{TASK,CALL}, AUDIT_PREPEND */
 380         __u32           action; /* AUDIT_NEVER, AUDIT_POSSIBLE, AUDIT_ALWAYS */
 381         __u32           field_count;
 382         __u32           mask[AUDIT_BITMASK_SIZE]; /* syscall(s) affected */
 383         __u32           fields[AUDIT_MAX_FIELDS];
 384         __u32           values[AUDIT_MAX_FIELDS];
 385         __u32           fieldflags[AUDIT_MAX_FIELDS];
 386         __u32           buflen; /* total length of string fields */
 387         char            buf[0]; /* string fields buffer */
 388 };
 389
 390 /* audit_rule is supported to maintain backward compatibility with
 391  * userspace.  It supports integer fields only and corresponds to
 392  * AUDIT_ADD, AUDIT_DEL and AUDIT_LIST requests.
 393  */
 394 struct audit_rule {             /* for AUDIT_LIST, AUDIT_ADD, and AUDIT_DEL */
 395         __u32           flags;  /* AUDIT_PER_{TASK,CALL}, AUDIT_PREPEND */
 396         __u32           action; /* AUDIT_NEVER, AUDIT_POSSIBLE, AUDIT_ALWAYS */
 397         __u32           field_count;
 398         __u32           mask[AUDIT_BITMASK_SIZE];
 399         __u32           fields[AUDIT_MAX_FIELDS];
 400         __u32           values[AUDIT_MAX_FIELDS];
 401 };
 402
 403 #ifdef __KERNEL__
 404 #include <linux/sched.h>
 405
 406 struct audit_sig_info {
 407         uid_t           uid;
 408         pid_t           pid;
 409         char            ctx[0];
 410 };
 411
 412 struct audit_buffer;
 413 struct audit_context;
 414 struct inode;
 415 struct netlink_skb_parms;
 416 struct path;
 417 struct linux_binprm;
 418 struct mq_attr;
 419 struct mqstat;
 420 struct audit_watch;
 421 struct audit_tree;
 422
 423 struct audit_krule {
 424         int                     vers_ops;
 425         u32                     flags;
 426         u32                     listnr;
 427         u32                     action;
 428         u32                     mask[AUDIT_BITMASK_SIZE];
 429         u32                     buflen; /* for data alloc on list rules */
 430         u32                     field_count;
 431         char                    *filterkey; /* ties events to rules */
 432         struct audit_field      *fields;
 433         struct audit_field      *arch_f; /* quick access to arch field */
 434         struct audit_field      *inode_f; /* quick access to an inode field */
 435         struct audit_watch      *watch; /* associated watch */
 436         struct audit_tree       *tree;  /* associated watched tree */
 437         struct list_head        rlist;  /* entry in audit_{watch,tree}.rules list */
 438         struct list_head        list;   /* for AUDIT_LIST* purposes only */
 439         u64                     prio;
 440 };
 441
 442 struct audit_field {
 443         u32                             type;
 444         u32                             val;
 445         u32                             op;
 446         char                            *lsm_str;
 447         void                            *lsm_rule;
 448 };
 449
 450 extern int __init audit_register_class(int class, unsigned *list);
 451 extern int audit_classify_syscall(int abi, unsigned syscall);
 452 extern int audit_classify_arch(int arch);
 453 #ifdef CONFIG_AUDITSYSCALL
 454 /* These are defined in auditsc.c */
 455                                 /* Public API */
 456 extern int  audit_alloc(struct task_struct *task);
 457 extern void __audit_free(struct task_struct *task);
 458 extern void __audit_syscall_entry(int arch,
 459                                   int major, unsigned long a0, unsigned long a1,
 460                                   unsigned long a2, unsigned long a3);
 461 extern void __audit_syscall_exit(int ret_success, long ret_value);
 462 extern void __audit_getname(const char *name);
 463 extern void audit_putname(const char *name);
 464 extern void __audit_inode(const char *name, const struct dentry *dentry);
 465 extern void __audit_inode_child(const struct dentry *dentry,
 466                                 const struct inode *parent);
 467 extern void __audit_seccomp(unsigned long syscall, long signr, int code);
 468 extern void __audit_ptrace(struct task_struct *t);
 469
 470 static inline int audit_dummy_context(void)
 471 {
 472         void *p = current->audit_context;
 473         return !p || *(int *)p;
 474 }
 475 static inline void audit_free(struct task_struct *task)
 476 {
 477         if (unlikely(task->audit_context))
 478                 __audit_free(task);
 479 }
 480 static inline void audit_syscall_entry(int arch, int major, unsigned long a0,
 481                                        unsigned long a1, unsigned long a2,
 482                                        unsigned long a3)
 483 {
 484         if (unlikely(!audit_dummy_context()))
 485                 __audit_syscall_entry(arch, major, a0, a1, a2, a3);
 486 }
 487 static inline void audit_syscall_exit(void *pt_regs)
 488 {
 489         if (unlikely(current->audit_context)) {
 490                 int success = is_syscall_success(pt_regs);
 491                 int return_code = regs_return_value(pt_regs);
 492
 493                 __audit_syscall_exit(success, return_code);
 494         }
 495 }
 496 static inline void audit_getname(const char *name)
 497 {
 498         if (unlikely(!audit_dummy_context()))
 499                 __audit_getname(name);
 500 }
 501 static inline void audit_inode(const char *name, const struct dentry *dentry) {
 502         if (unlikely(!audit_dummy_context()))
 503                 __audit_inode(name, dentry);
 504 }
 505 static inline void audit_inode_child(const struct dentry *dentry,
 506                                      const struct inode *parent) {
 507         if (unlikely(!audit_dummy_context()))
 508                 __audit_inode_child(dentry, parent);
 509 }
 510 void audit_core_dumps(long signr);
 511
 512 static inline void audit_seccomp(unsigned long syscall, long signr, int code)
 513 {
 514         if (unlikely(!audit_dummy_context()))
 515                 __audit_seccomp(syscall, signr, code);
 516 }
 517
 518 static inline void audit_ptrace(struct task_struct *t)
 519 {
 520         if (unlikely(!audit_dummy_context()))
 521                 __audit_ptrace(t);
 522 }
 523
 524                                 /* Private API (for audit.c only) */
 525 extern unsigned int audit_serial(void);
 526 extern int auditsc_get_stamp(struct audit_context *ctx,
 527                               struct timespec *t, unsigned int *serial);
 528 extern int  audit_set_loginuid(uid_t loginuid);
 529 #define audit_get_loginuid(t) ((t)->loginuid)
 530 #define audit_get_sessionid(t) ((t)->sessionid)
 531 extern void audit_log_task_context(struct audit_buffer *ab);
 532 extern void __audit_ipc_obj(struct kern_ipc_perm *ipcp);
 533 extern void __audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, umode_t mode);
 534 extern int __audit_bprm(struct linux_binprm *bprm);
 535 extern void __audit_socketcall(int nargs, unsigned long *args);
 536 extern int __audit_sockaddr(int len, void *addr);
 537 extern void __audit_fd_pair(int fd1, int fd2);
 538 extern void __audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr);
 539 extern void __audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec *abs_timeout);
 540 extern void __audit_mq_notify(mqd_t mqdes, const struct sigevent *notification);
 541 extern void __audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat);
 542 extern int __audit_log_bprm_fcaps(struct linux_binprm *bprm,
 543                                   const struct cred *new,
 544                                   const struct cred *old);
 545 extern void __audit_log_capset(pid_t pid, const struct cred *new, const struct cred *old);
 546 extern void __audit_mmap_fd(int fd, int flags);
 547
 548 static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
 549 {
 550         if (unlikely(!audit_dummy_context()))
 551                 __audit_ipc_obj(ipcp);
 552 }
 553 static inline void audit_fd_pair(int fd1, int fd2)
 554 {
 555         if (unlikely(!audit_dummy_context()))
 556                 __audit_fd_pair(fd1, fd2);
 557 }
 558 static inline void audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, umode_t mode)
 559 {
 560         if (unlikely(!audit_dummy_context()))
 561                 __audit_ipc_set_perm(qbytes, uid, gid, mode);
 562 }
 563 static inline int audit_bprm(struct linux_binprm *bprm)
 564 {
 565         if (unlikely(!audit_dummy_context()))
 566                 return __audit_bprm(bprm);
 567         return 0;
 568 }
 569 static inline void audit_socketcall(int nargs, unsigned long *args)
 570 {
 571         if (unlikely(!audit_dummy_context()))
 572                 __audit_socketcall(nargs, args);
 573 }
 574 static inline int audit_sockaddr(int len, void *addr)
 575 {
 576         if (unlikely(!audit_dummy_context()))
 577                 return __audit_sockaddr(len, addr);
 578         return 0;
 579 }
 580 static inline void audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr)
 581 {
 582         if (unlikely(!audit_dummy_context()))
 583                 __audit_mq_open(oflag, mode, attr);
 584 }
 585 static inline void audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec *abs_timeout)
 586 {
 587         if (unlikely(!audit_dummy_context()))
 588                 __audit_mq_sendrecv(mqdes, msg_len, msg_prio, abs_timeout);
 589 }
 590 static inline void audit_mq_notify(mqd_t mqdes, const struct sigevent *notification)
 591 {
 592         if (unlikely(!audit_dummy_context()))
 593                 __audit_mq_notify(mqdes, notification);
 594 }
 595 static inline void audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
 596 {
 597         if (unlikely(!audit_dummy_context()))
 598                 __audit_mq_getsetattr(mqdes, mqstat);
 599 }
 600
 601 static inline int audit_log_bprm_fcaps(struct linux_binprm *bprm,
 602                                        const struct cred *new,
 603                                        const struct cred *old)
 604 {
 605         if (unlikely(!audit_dummy_context()))
 606                 return __audit_log_bprm_fcaps(bprm, new, old);
 607         return 0;
 608 }
 609
 610 static inline void audit_log_capset(pid_t pid, const struct cred *new,
 611                                    const struct cred *old)
 612 {
 613         if (unlikely(!audit_dummy_context()))
 614                 __audit_log_capset(pid, new, old);
 615 }
 616
 617 static inline void audit_mmap_fd(int fd, int flags)
 618 {
 619         if (unlikely(!audit_dummy_context()))
 620                 __audit_mmap_fd(fd, flags);
 621 }
 622
 623 extern int audit_n_rules;
 624 extern int audit_signals;
 625 #else /* CONFIG_AUDITSYSCALL */
 626 #define audit_alloc(t) ({ 0; })
 627 #define audit_free(t) do { ; } while (0)
 628 #define audit_syscall_entry(ta,a,b,c,d,e) do { ; } while (0)
 629 #define audit_syscall_exit(r) do { ; } while (0)
 630 #define audit_dummy_context() 1
 631 #define audit_getname(n) do { ; } while (0)
 632 #define audit_putname(n) do { ; } while (0)
 633 #define __audit_inode(n,d) do { ; } while (0)
 634 #define __audit_inode_child(i,p) do { ; } while (0)
 635 #define audit_inode(n,d) do { (void)(d); } while (0)
 636 #define audit_inode_child(i,p) do { ; } while (0)
 637 #define audit_core_dumps(i) do { ; } while (0)
 638 #define audit_seccomp(i,s,c) do { ; } while (0)
 639 #define auditsc_get_stamp(c,t,s) (0)
 640 #define audit_get_loginuid(t) (-1)
 641 #define audit_get_sessionid(t) (-1)
 642 #define audit_log_task_context(b) do { ; } while (0)
 643 #define audit_ipc_obj(i) ((void)0)
 644 #define audit_ipc_set_perm(q,u,g,m) ((void)0)
 645 #define audit_bprm(p) ({ 0; })
 646 #define audit_socketcall(n,a) ((void)0)
 647 #define audit_fd_pair(n,a) ((void)0)
 648 #define audit_sockaddr(len, addr) ({ 0; })
 649 #define audit_mq_open(o,m,a) ((void)0)
 650 #define audit_mq_sendrecv(d,l,p,t) ((void)0)
 651 #define audit_mq_notify(d,n) ((void)0)
 652 #define audit_mq_getsetattr(d,s) ((void)0)
 653 #define audit_log_bprm_fcaps(b, ncr, ocr) ({ 0; })
 654 #define audit_log_capset(pid, ncr, ocr) ((void)0)
 655 #define audit_mmap_fd(fd, flags) ((void)0)
 656 #define audit_ptrace(t) ((void)0)
 657 #define audit_n_rules 0
 658 #define audit_signals 0
 659 #endif /* CONFIG_AUDITSYSCALL */
 660
 661 #ifdef CONFIG_AUDIT
 662 /* These are defined in audit.c */
 663                                 /* Public API */
 664 extern __printf(4, 5)
 665 void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,
 666                const char *fmt, ...);
 667
 668 extern struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, int type);
 669 extern __printf(2, 3)
 670 void audit_log_format(struct audit_buffer *ab, const char *fmt, ...);
 671 extern void                 audit_log_end(struct audit_buffer *ab);
 672 extern int                  audit_string_contains_control(const char *string,
 673                                                           size_t len);
 674 extern void                 audit_log_n_hex(struct audit_buffer *ab,
 675                                           const unsigned char *buf,
 676                                           size_t len);
 677 extern void                 audit_log_n_string(struct audit_buffer *ab,
 678                                                const char *buf,
 679                                                size_t n);
 680 #define audit_log_string(a,b) audit_log_n_string(a, b, strlen(b));
 681 extern void                 audit_log_n_untrustedstring(struct audit_buffer *ab,
 682                                                         const char *string,
 683                                                         size_t n);
 684 extern void                 audit_log_untrustedstring(struct audit_buffer *ab,
 685                                                       const char *string);
 686 extern void                 audit_log_d_path(struct audit_buffer *ab,
 687                                              const char *prefix,
 688                                              const struct path *path);
 689 extern void                 audit_log_key(struct audit_buffer *ab,
 690                                           char *key);
 691 extern void                 audit_log_link_denied(const char *operation,
 692                                                   struct path *link);
 693 extern void                 audit_log_lost(const char *message);
 694 #ifdef CONFIG_SECURITY
 695 extern void                 audit_log_secctx(struct audit_buffer *ab, u32 secid);
 696 #else
 697 #define audit_log_secctx(b,s) do { ; } while (0)
 698 #endif
 699
 700 extern int                  audit_update_lsm_rules(void);
 701
 702                                 /* Private API (for audit.c only) */
 703 extern int audit_filter_user(struct netlink_skb_parms *cb);
 704 extern int audit_filter_type(int type);
 705 extern int  audit_receive_filter(int type, int pid, int uid, int seq,
 706                                 void *data, size_t datasz, uid_t loginuid,
 707                                 u32 sessionid, u32 sid);
 708 extern int audit_enabled;
 709 #else
 710 #define audit_log(c,g,t,f,...) do { ; } while (0)
 711 #define audit_log_start(c,g,t) ({ NULL; })
 712 #define audit_log_vformat(b,f,a) do { ; } while (0)
 713 #define audit_log_format(b,f,...) do { ; } while (0)
 714 #define audit_log_end(b) do { ; } while (0)
 715 #define audit_log_n_hex(a,b,l) do { ; } while (0)
 716 #define audit_log_n_string(a,c,l) do { ; } while (0)
 717 #define audit_log_string(a,c) do { ; } while (0)
 718 #define audit_log_n_untrustedstring(a,n,s) do { ; } while (0)
 719 #define audit_log_untrustedstring(a,s) do { ; } while (0)
 720 #define audit_log_d_path(b, p, d) do { ; } while (0)
 721 #define audit_log_key(b, k) do { ; } while (0)
 722 #define audit_log_link_denied(o, l) do { ; } while (0)
 723 #define audit_log_secctx(b,s) do { ; } while (0)
 724 #define audit_enabled 0
 725 #endif
 726 #endif
 727 #endif