Merge tag 'for-f2fs-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk...

[cascardo/linux.git] / include / uapi / linux / audit.h

/* audit.h -- Auditing support
 *
 * Copyright 2003-2004 Red Hat Inc., Durham, North Carolina.
 * All Rights Reserved.
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Written by Rickard E. (Rik) Faith <faith@redhat.com>
 *
 */

#ifndef _UAPI_LINUX_AUDIT_H_
#define _UAPI_LINUX_AUDIT_H_

#include <linux/types.h>
#include <linux/elf-em.h>

/* The netlink messages for the audit system is divided into blocks:
 * 1000 - 1099 are for commanding the audit system
 * 1100 - 1199 user space trusted application messages
 * 1200 - 1299 messages internal to the audit daemon
 * 1300 - 1399 audit event messages
 * 1400 - 1499 SE Linux use
 * 1500 - 1599 kernel LSPP events
 * 1600 - 1699 kernel crypto events
 * 1700 - 1799 kernel anomaly records
 * 1800 - 1899 kernel integrity events
 * 1900 - 1999 future kernel use
 * 2000 is for otherwise unclassified kernel audit messages (legacy)
 * 2001 - 2099 unused (kernel)
 * 2100 - 2199 user space anomaly records
 * 2200 - 2299 user space actions taken in response to anomalies
 * 2300 - 2399 user space generated LSPP events
 * 2400 - 2499 user space crypto events
 * 2500 - 2999 future user space (maybe integrity labels and related events)
 *
 * Messages from 1000-1199 are bi-directional. 1200-1299 & 2100 - 2999 are
 * exclusively user space. 1300-2099 is kernel --> user space 
 * communication.
 */
#define AUDIT_GET               1000    /* Get status */
#define AUDIT_SET               1001    /* Set status (enable/disable/auditd) */
#define AUDIT_LIST              1002    /* List syscall rules -- deprecated */
#define AUDIT_ADD               1003    /* Add syscall rule -- deprecated */
#define AUDIT_DEL               1004    /* Delete syscall rule -- deprecated */
#define AUDIT_USER              1005    /* Message from userspace -- deprecated */
#define AUDIT_LOGIN             1006    /* Define the login id and information */
#define AUDIT_WATCH_INS         1007    /* Insert file/dir watch entry */
#define AUDIT_WATCH_REM         1008    /* Remove file/dir watch entry */
#define AUDIT_WATCH_LIST        1009    /* List all file/dir watches */
#define AUDIT_SIGNAL_INFO       1010    /* Get info about sender of signal to auditd */
#define AUDIT_ADD_RULE          1011    /* Add syscall filtering rule */
#define AUDIT_DEL_RULE          1012    /* Delete syscall filtering rule */
#define AUDIT_LIST_RULES        1013    /* List syscall filtering rules */
#define AUDIT_TRIM              1014    /* Trim junk from watched tree */
#define AUDIT_MAKE_EQUIV        1015    /* Append to watched tree */
#define AUDIT_TTY_GET           1016    /* Get TTY auditing status */
#define AUDIT_TTY_SET           1017    /* Set TTY auditing status */
#define AUDIT_SET_FEATURE       1018    /* Turn an audit feature on or off */
#define AUDIT_GET_FEATURE       1019    /* Get which features are enabled */

#define AUDIT_FIRST_USER_MSG    1100    /* Userspace messages mostly uninteresting to kernel */
#define AUDIT_USER_AVC          1107    /* We filter this differently */
#define AUDIT_USER_TTY          1124    /* Non-ICANON TTY input meaning */
#define AUDIT_LAST_USER_MSG     1199
#define AUDIT_FIRST_USER_MSG2   2100    /* More user space messages */
#define AUDIT_LAST_USER_MSG2    2999
 
#define AUDIT_DAEMON_START      1200    /* Daemon startup record */
#define AUDIT_DAEMON_END        1201    /* Daemon normal stop record */
#define AUDIT_DAEMON_ABORT      1202    /* Daemon error stop record */
#define AUDIT_DAEMON_CONFIG     1203    /* Daemon config change */

#define AUDIT_SYSCALL           1300    /* Syscall event */
/* #define AUDIT_FS_WATCH       1301     * Deprecated */
#define AUDIT_PATH              1302    /* Filename path information */
#define AUDIT_IPC               1303    /* IPC record */
#define AUDIT_SOCKETCALL        1304    /* sys_socketcall arguments */
#define AUDIT_CONFIG_CHANGE     1305    /* Audit system configuration change */
#define AUDIT_SOCKADDR          1306    /* sockaddr copied as syscall arg */
#define AUDIT_CWD               1307    /* Current working directory */
#define AUDIT_EXECVE            1309    /* execve arguments */
#define AUDIT_IPC_SET_PERM      1311    /* IPC new permissions record type */
#define AUDIT_MQ_OPEN           1312    /* POSIX MQ open record type */
#define AUDIT_MQ_SENDRECV       1313    /* POSIX MQ send/receive record type */
#define AUDIT_MQ_NOTIFY         1314    /* POSIX MQ notify record type */
#define AUDIT_MQ_GETSETATTR     1315    /* POSIX MQ get/set attribute record type */
#define AUDIT_KERNEL_OTHER      1316    /* For use by 3rd party modules */
#define AUDIT_FD_PAIR           1317    /* audit record for pipe/socketpair */
#define AUDIT_OBJ_PID           1318    /* ptrace target */
#define AUDIT_TTY               1319    /* Input on an administrative TTY */
#define AUDIT_EOE               1320    /* End of multi-record event */
#define AUDIT_BPRM_FCAPS        1321    /* Information about fcaps increasing perms */
#define AUDIT_CAPSET            1322    /* Record showing argument to sys_capset */
#define AUDIT_MMAP              1323    /* Record showing descriptor and flags in mmap */
#define AUDIT_NETFILTER_PKT     1324    /* Packets traversing netfilter chains */
#define AUDIT_NETFILTER_CFG     1325    /* Netfilter chain modifications */
#define AUDIT_SECCOMP           1326    /* Secure Computing event */
#define AUDIT_PROCTITLE         1327    /* Proctitle emit event */
#define AUDIT_FEATURE_CHANGE    1328    /* audit log listing feature changes */
#define AUDIT_REPLACE           1329    /* Replace auditd if this packet unanswerd */

#define AUDIT_AVC               1400    /* SE Linux avc denial or grant */
#define AUDIT_SELINUX_ERR       1401    /* Internal SE Linux Errors */
#define AUDIT_AVC_PATH          1402    /* dentry, vfsmount pair from avc */
#define AUDIT_MAC_POLICY_LOAD   1403    /* Policy file load */
#define AUDIT_MAC_STATUS        1404    /* Changed enforcing,permissive,off */
#define AUDIT_MAC_CONFIG_CHANGE 1405    /* Changes to booleans */
#define AUDIT_MAC_UNLBL_ALLOW   1406    /* NetLabel: allow unlabeled traffic */
#define AUDIT_MAC_CIPSOV4_ADD   1407    /* NetLabel: add CIPSOv4 DOI entry */
#define AUDIT_MAC_CIPSOV4_DEL   1408    /* NetLabel: del CIPSOv4 DOI entry */
#define AUDIT_MAC_MAP_ADD       1409    /* NetLabel: add LSM domain mapping */
#define AUDIT_MAC_MAP_DEL       1410    /* NetLabel: del LSM domain mapping */
#define AUDIT_MAC_IPSEC_ADDSA   1411    /* Not used */
#define AUDIT_MAC_IPSEC_DELSA   1412    /* Not used  */
#define AUDIT_MAC_IPSEC_ADDSPD  1413    /* Not used */
#define AUDIT_MAC_IPSEC_DELSPD  1414    /* Not used */
#define AUDIT_MAC_IPSEC_EVENT   1415    /* Audit an IPSec event */
#define AUDIT_MAC_UNLBL_STCADD  1416    /* NetLabel: add a static label */
#define AUDIT_MAC_UNLBL_STCDEL  1417    /* NetLabel: del a static label */

#define AUDIT_FIRST_KERN_ANOM_MSG   1700
#define AUDIT_LAST_KERN_ANOM_MSG    1799
#define AUDIT_ANOM_PROMISCUOUS      1700 /* Device changed promiscuous mode */
#define AUDIT_ANOM_ABEND            1701 /* Process ended abnormally */
#define AUDIT_ANOM_LINK             1702 /* Suspicious use of file links */
#define AUDIT_INTEGRITY_DATA        1800 /* Data integrity verification */
#define AUDIT_INTEGRITY_METADATA    1801 /* Metadata integrity verification */
#define AUDIT_INTEGRITY_STATUS      1802 /* Integrity enable status */
#define AUDIT_INTEGRITY_HASH        1803 /* Integrity HASH type */
#define AUDIT_INTEGRITY_PCR         1804 /* PCR invalidation msgs */
#define AUDIT_INTEGRITY_RULE        1805 /* policy rule */

#define AUDIT_KERNEL            2000    /* Asynchronous audit record. NOT A REQUEST. */

/* Rule flags */
#define AUDIT_FILTER_USER       0x00    /* Apply rule to user-generated messages */
#define AUDIT_FILTER_TASK       0x01    /* Apply rule at task creation (not syscall) */
#define AUDIT_FILTER_ENTRY      0x02    /* Apply rule at syscall entry */
#define AUDIT_FILTER_WATCH      0x03    /* Apply rule to file system watches */
#define AUDIT_FILTER_EXIT       0x04    /* Apply rule at syscall exit */
#define AUDIT_FILTER_TYPE       0x05    /* Apply rule at audit_log_start */

#define AUDIT_NR_FILTERS        6

#define AUDIT_FILTER_PREPEND    0x10    /* Prepend to front of list */

/* Rule actions */
#define AUDIT_NEVER    0        /* Do not build context if rule matches */
#define AUDIT_POSSIBLE 1        /* Build context if rule matches  */
#define AUDIT_ALWAYS   2        /* Generate audit record if rule matches */

/* Rule structure sizes -- if these change, different AUDIT_ADD and
 * AUDIT_LIST commands must be implemented. */
#define AUDIT_MAX_FIELDS   64
#define AUDIT_MAX_KEY_LEN  256
#define AUDIT_BITMASK_SIZE 64
#define AUDIT_WORD(nr) ((__u32)((nr)/32))
#define AUDIT_BIT(nr)  (1 << ((nr) - AUDIT_WORD(nr)*32))

#define AUDIT_SYSCALL_CLASSES 16
#define AUDIT_CLASS_DIR_WRITE 0
#define AUDIT_CLASS_DIR_WRITE_32 1
#define AUDIT_CLASS_CHATTR 2
#define AUDIT_CLASS_CHATTR_32 3
#define AUDIT_CLASS_READ 4
#define AUDIT_CLASS_READ_32 5
#define AUDIT_CLASS_WRITE 6
#define AUDIT_CLASS_WRITE_32 7
#define AUDIT_CLASS_SIGNAL 8
#define AUDIT_CLASS_SIGNAL_32 9

/* This bitmask is used to validate user input.  It represents all bits that
 * are currently used in an audit field constant understood by the kernel.
 * If you are adding a new #define AUDIT_<whatever>, please ensure that
 * AUDIT_UNUSED_BITS is updated if need be. */
#define AUDIT_UNUSED_BITS       0x07FFFC00

/* AUDIT_FIELD_COMPARE rule list */
#define AUDIT_COMPARE_UID_TO_OBJ_UID    1
#define AUDIT_COMPARE_GID_TO_OBJ_GID    2
#define AUDIT_COMPARE_EUID_TO_OBJ_UID   3
#define AUDIT_COMPARE_EGID_TO_OBJ_GID   4
#define AUDIT_COMPARE_AUID_TO_OBJ_UID   5
#define AUDIT_COMPARE_SUID_TO_OBJ_UID   6
#define AUDIT_COMPARE_SGID_TO_OBJ_GID   7
#define AUDIT_COMPARE_FSUID_TO_OBJ_UID  8
#define AUDIT_COMPARE_FSGID_TO_OBJ_GID  9

#define AUDIT_COMPARE_UID_TO_AUID       10
#define AUDIT_COMPARE_UID_TO_EUID       11
#define AUDIT_COMPARE_UID_TO_FSUID      12
#define AUDIT_COMPARE_UID_TO_SUID       13

#define AUDIT_COMPARE_AUID_TO_FSUID     14
#define AUDIT_COMPARE_AUID_TO_SUID      15
#define AUDIT_COMPARE_AUID_TO_EUID      16

#define AUDIT_COMPARE_EUID_TO_SUID      17
#define AUDIT_COMPARE_EUID_TO_FSUID     18

#define AUDIT_COMPARE_SUID_TO_FSUID     19

#define AUDIT_COMPARE_GID_TO_EGID       20
#define AUDIT_COMPARE_GID_TO_FSGID      21
#define AUDIT_COMPARE_GID_TO_SGID       22

#define AUDIT_COMPARE_EGID_TO_FSGID     23
#define AUDIT_COMPARE_EGID_TO_SGID      24
#define AUDIT_COMPARE_SGID_TO_FSGID     25

#define AUDIT_MAX_FIELD_COMPARE         AUDIT_COMPARE_SGID_TO_FSGID

/* Rule fields */
                                /* These are useful when checking the
                                 * task structure at task creation time
                                 * (AUDIT_PER_TASK).  */
#define AUDIT_PID       0
#define AUDIT_UID       1
#define AUDIT_EUID      2
#define AUDIT_SUID      3
#define AUDIT_FSUID     4
#define AUDIT_GID       5
#define AUDIT_EGID      6
#define AUDIT_SGID      7
#define AUDIT_FSGID     8
#define AUDIT_LOGINUID  9
#define AUDIT_PERS      10
#define AUDIT_ARCH      11
#define AUDIT_MSGTYPE   12
#define AUDIT_SUBJ_USER 13      /* security label user */
#define AUDIT_SUBJ_ROLE 14      /* security label role */
#define AUDIT_SUBJ_TYPE 15      /* security label type */
#define AUDIT_SUBJ_SEN  16      /* security label sensitivity label */
#define AUDIT_SUBJ_CLR  17      /* security label clearance label */
#define AUDIT_PPID      18
#define AUDIT_OBJ_USER  19
#define AUDIT_OBJ_ROLE  20
#define AUDIT_OBJ_TYPE  21
#define AUDIT_OBJ_LEV_LOW       22
#define AUDIT_OBJ_LEV_HIGH      23
#define AUDIT_LOGINUID_SET      24

                                /* These are ONLY useful when checking
                                 * at syscall exit time (AUDIT_AT_EXIT). */
#define AUDIT_DEVMAJOR  100
#define AUDIT_DEVMINOR  101
#define AUDIT_INODE     102
#define AUDIT_EXIT      103
#define AUDIT_SUCCESS   104     /* exit >= 0; value ignored */
#define AUDIT_WATCH     105
#define AUDIT_PERM      106
#define AUDIT_DIR       107
#define AUDIT_FILETYPE  108
#define AUDIT_OBJ_UID   109
#define AUDIT_OBJ_GID   110
#define AUDIT_FIELD_COMPARE     111
#define AUDIT_EXE       112

#define AUDIT_ARG0      200
#define AUDIT_ARG1      (AUDIT_ARG0+1)
#define AUDIT_ARG2      (AUDIT_ARG0+2)
#define AUDIT_ARG3      (AUDIT_ARG0+3)

#define AUDIT_FILTERKEY 210

#define AUDIT_NEGATE                    0x80000000

/* These are the supported operators.
 *      4  2  1  8
 *      =  >  <  ?
 *      ----------
 *      0  0  0  0      00      nonsense
 *      0  0  0  1      08      &  bit mask
 *      0  0  1  0      10      <
 *      0  1  0  0      20      >
 *      0  1  1  0      30      !=
 *      1  0  0  0      40      =
 *      1  0  0  1      48      &=  bit test
 *      1  0  1  0      50      <=
 *      1  1  0  0      60      >=
 *      1  1  1  1      78      all operators
 */
#define AUDIT_BIT_MASK                  0x08000000
#define AUDIT_LESS_THAN                 0x10000000
#define AUDIT_GREATER_THAN              0x20000000
#define AUDIT_NOT_EQUAL                 0x30000000
#define AUDIT_EQUAL                     0x40000000
#define AUDIT_BIT_TEST                  (AUDIT_BIT_MASK|AUDIT_EQUAL)
#define AUDIT_LESS_THAN_OR_EQUAL        (AUDIT_LESS_THAN|AUDIT_EQUAL)
#define AUDIT_GREATER_THAN_OR_EQUAL     (AUDIT_GREATER_THAN|AUDIT_EQUAL)
#define AUDIT_OPERATORS                 (AUDIT_EQUAL|AUDIT_NOT_EQUAL|AUDIT_BIT_MASK)

enum {
        Audit_equal,
        Audit_not_equal,
        Audit_bitmask,
        Audit_bittest,
        Audit_lt,
        Audit_gt,
        Audit_le,
        Audit_ge,
        Audit_bad
};

/* Status symbols */
                                /* Mask values */
#define AUDIT_STATUS_ENABLED            0x0001
#define AUDIT_STATUS_FAILURE            0x0002
#define AUDIT_STATUS_PID                0x0004
#define AUDIT_STATUS_RATE_LIMIT         0x0008
#define AUDIT_STATUS_BACKLOG_LIMIT      0x0010
#define AUDIT_STATUS_BACKLOG_WAIT_TIME  0x0020

#define AUDIT_FEATURE_BITMAP_BACKLOG_LIMIT      0x00000001
#define AUDIT_FEATURE_BITMAP_BACKLOG_WAIT_TIME  0x00000002
#define AUDIT_FEATURE_BITMAP_EXECUTABLE_PATH    0x00000004
#define AUDIT_FEATURE_BITMAP_ALL (AUDIT_FEATURE_BITMAP_BACKLOG_LIMIT | \
                                  AUDIT_FEATURE_BITMAP_BACKLOG_WAIT_TIME | \
                                  AUDIT_FEATURE_BITMAP_EXECUTABLE_PATH)

/* deprecated: AUDIT_VERSION_* */
#define AUDIT_VERSION_LATEST            AUDIT_FEATURE_BITMAP_ALL
#define AUDIT_VERSION_BACKLOG_LIMIT     AUDIT_FEATURE_BITMAP_BACKLOG_LIMIT
#define AUDIT_VERSION_BACKLOG_WAIT_TIME AUDIT_FEATURE_BITMAP_BACKLOG_WAIT_TIME

                                /* Failure-to-log actions */
#define AUDIT_FAIL_SILENT       0
#define AUDIT_FAIL_PRINTK       1
#define AUDIT_FAIL_PANIC        2

/*
 * These bits disambiguate different calling conventions that share an
 * ELF machine type, bitness, and endianness
 */
#define __AUDIT_ARCH_CONVENTION_MASK 0x30000000
#define __AUDIT_ARCH_CONVENTION_MIPS64_N32 0x20000000

/* distinguish syscall tables */
#define __AUDIT_ARCH_64BIT 0x80000000
#define __AUDIT_ARCH_LE    0x40000000

#define AUDIT_ARCH_AARCH64      (EM_AARCH64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_ALPHA        (EM_ALPHA|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_ARM          (EM_ARM|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_ARMEB        (EM_ARM)
#define AUDIT_ARCH_CRIS         (EM_CRIS|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_FRV          (EM_FRV)
#define AUDIT_ARCH_I386         (EM_386|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_IA64         (EM_IA_64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_M32R         (EM_M32R)
#define AUDIT_ARCH_M68K         (EM_68K)
#define AUDIT_ARCH_MICROBLAZE   (EM_MICROBLAZE)
#define AUDIT_ARCH_MIPS         (EM_MIPS)
#define AUDIT_ARCH_MIPSEL       (EM_MIPS|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_MIPS64       (EM_MIPS|__AUDIT_ARCH_64BIT)
#define AUDIT_ARCH_MIPS64N32    (EM_MIPS|__AUDIT_ARCH_64BIT|\
                                 __AUDIT_ARCH_CONVENTION_MIPS64_N32)
#define AUDIT_ARCH_MIPSEL64     (EM_MIPS|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_MIPSEL64N32  (EM_MIPS|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE|\
                                 __AUDIT_ARCH_CONVENTION_MIPS64_N32)
#define AUDIT_ARCH_OPENRISC     (EM_OPENRISC)
#define AUDIT_ARCH_PARISC       (EM_PARISC)
#define AUDIT_ARCH_PARISC64     (EM_PARISC|__AUDIT_ARCH_64BIT)
#define AUDIT_ARCH_PPC          (EM_PPC)
/* do not define AUDIT_ARCH_PPCLE since it is not supported by audit */
#define AUDIT_ARCH_PPC64        (EM_PPC64|__AUDIT_ARCH_64BIT)
#define AUDIT_ARCH_PPC64LE      (EM_PPC64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_S390         (EM_S390)
#define AUDIT_ARCH_S390X        (EM_S390|__AUDIT_ARCH_64BIT)
#define AUDIT_ARCH_SH           (EM_SH)
#define AUDIT_ARCH_SHEL         (EM_SH|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_SH64         (EM_SH|__AUDIT_ARCH_64BIT)
#define AUDIT_ARCH_SHEL64       (EM_SH|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_SPARC        (EM_SPARC)
#define AUDIT_ARCH_SPARC64      (EM_SPARCV9|__AUDIT_ARCH_64BIT)
#define AUDIT_ARCH_TILEGX       (EM_TILEGX|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_TILEGX32     (EM_TILEGX|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_TILEPRO      (EM_TILEPRO|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_X86_64       (EM_X86_64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)

#define AUDIT_PERM_EXEC         1
#define AUDIT_PERM_WRITE        2
#define AUDIT_PERM_READ         4
#define AUDIT_PERM_ATTR         8

/* MAX_AUDIT_MESSAGE_LENGTH is set in audit:lib/libaudit.h as:
 * 8970 // PATH_MAX*2+CONTEXT_SIZE*2+11+256+1
 * max header+body+tailer: 44 + 29 + 32 + 262 + 7 + pad
 */
#define AUDIT_MESSAGE_TEXT_MAX  8560

/* Multicast Netlink socket groups (default up to 32) */
enum audit_nlgrps {
        AUDIT_NLGRP_NONE,       /* Group 0 not used */
        AUDIT_NLGRP_READLOG,    /* "best effort" read only socket */
        __AUDIT_NLGRP_MAX
};
#define AUDIT_NLGRP_MAX                (__AUDIT_NLGRP_MAX - 1)

struct audit_status {
        __u32           mask;           /* Bit mask for valid entries */
        __u32           enabled;        /* 1 = enabled, 0 = disabled */
        __u32           failure;        /* Failure-to-log action */
        __u32           pid;            /* pid of auditd process */
        __u32           rate_limit;     /* messages rate limit (per second) */
        __u32           backlog_limit;  /* waiting messages limit */
        __u32           lost;           /* messages lost */
        __u32           backlog;        /* messages waiting in queue */
        union {
                __u32   version;        /* deprecated: audit api version num */
                __u32   feature_bitmap; /* bitmap of kernel audit features */
        };
        __u32           backlog_wait_time;/* message queue wait timeout */
};

struct audit_features {
#define AUDIT_FEATURE_VERSION   1
        __u32   vers;
        __u32   mask;           /* which bits we are dealing with */
        __u32   features;       /* which feature to enable/disable */
        __u32   lock;           /* which features to lock */
};

#define AUDIT_FEATURE_ONLY_UNSET_LOGINUID       0
#define AUDIT_FEATURE_LOGINUID_IMMUTABLE        1
#define AUDIT_LAST_FEATURE                      AUDIT_FEATURE_LOGINUID_IMMUTABLE

#define audit_feature_valid(x)          ((x) >= 0 && (x) <= AUDIT_LAST_FEATURE)
#define AUDIT_FEATURE_TO_MASK(x)        (1 << ((x) & 31)) /* mask for __u32 */

struct audit_tty_status {
        __u32           enabled;        /* 1 = enabled, 0 = disabled */
        __u32           log_passwd;     /* 1 = enabled, 0 = disabled */
};

#define AUDIT_UID_UNSET (unsigned int)-1

/* audit_rule_data supports filter rules with both integer and string
 * fields.  It corresponds with AUDIT_ADD_RULE, AUDIT_DEL_RULE and
 * AUDIT_LIST_RULES requests.
 */
struct audit_rule_data {
        __u32           flags;  /* AUDIT_PER_{TASK,CALL}, AUDIT_PREPEND */
        __u32           action; /* AUDIT_NEVER, AUDIT_POSSIBLE, AUDIT_ALWAYS */
        __u32           field_count;
        __u32           mask[AUDIT_BITMASK_SIZE]; /* syscall(s) affected */
        __u32           fields[AUDIT_MAX_FIELDS];
        __u32           values[AUDIT_MAX_FIELDS];
        __u32           fieldflags[AUDIT_MAX_FIELDS];
        __u32           buflen; /* total length of string fields */
        char            buf[0]; /* string fields buffer */
};

#endif /* _UAPI_LINUX_AUDIT_H_ */