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freebsd-dev/sys/bsm/audit.h
Konstantin Belousov 6992112349 Commit the 64-bit inode project. 
Extend the ino_t, dev_t, nlink_t types to 64-bit ints.  Modify
struct dirent layout to add d_off, increase the size of d_fileno
to 64-bits, increase the size of d_namlen to 16-bits, and change
the required alignment.  Increase struct statfs f_mntfromname[] and
f_mntonname[] array length MNAMELEN to 1024.

ABI breakage is mitigated by providing compatibility using versioned
symbols, ingenious use of the existing padding in structures, and
by employing other tricks.  Unfortunately, not everything can be
fixed, especially outside the base system.  For instance, third-party
APIs which pass struct stat around are broken in backward and
forward incompatible ways.

Kinfo sysctl MIBs ABI is changed in backward-compatible way, but
there is no general mechanism to handle other sysctl MIBS which
return structures where the layout has changed. It was considered
that the breakage is either in the management interfaces, where we
usually allow ABI slip, or is not important.

Struct xvnode changed layout, no compat shims are provided.

For struct xtty, dev_t tty device member was reduced to uint32_t.
It was decided that keeping ABI compat in this case is more useful
than reporting 64-bit dev_t, for the sake of pstat.

Update note: strictly follow the instructions in UPDATING.  Build
and install the new kernel with COMPAT_FREEBSD11 option enabled,
then reboot, and only then install new world.

Credits: The 64-bit inode project, also known as ino64, started life
many years ago as a project by Gleb Kurtsou (gleb).  Kirk McKusick
(mckusick) then picked up and updated the patch, and acted as a
flag-waver.  Feedback, suggestions, and discussions were carried
by Ed Maste (emaste), John Baldwin (jhb), Jilles Tjoelker (jilles),
and Rick Macklem (rmacklem).  Kris Moore (kris) performed an initial
ports investigation followed by an exp-run by Antoine Brodin (antoine).
Essential and all-embracing testing was done by Peter Holm (pho).
The heavy lifting of coordinating all these efforts and bringing the
project to completion were done by Konstantin Belousov (kib).

Sponsored by:	The FreeBSD Foundation (emaste, kib)
Differential revision:	https://reviews.freebsd.org/D10439
2017-05-23 09:29:05 +00:00

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/*-
* Copyright (c) 2005-2009 Apple Inc.
* Copyright (c) 2016 Robert N. M. Watson
* All rights reserved.
*
* Portions of this software were developed by BAE Systems, the University of
* Cambridge Computer Laboratory, and Memorial University under DARPA/AFRL
* contract FA8650-15-C-7558 ("CADETS"), as part of the DARPA Transparent
* Computing (TC) research program.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Apple Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _BSM_AUDIT_H
#define _BSM_AUDIT_H
#include <sys/param.h>
#include <sys/types.h>
#define AUDIT_RECORD_MAGIC 0x828a0f1b
#define MAX_AUDIT_RECORDS 20
#define MAXAUDITDATA (0x8000 - 1)
#define MAX_AUDIT_RECORD_SIZE MAXAUDITDATA
#define MIN_AUDIT_FILE_SIZE (512 * 1024)
/*
* Minimum noumber of free blocks on the filesystem containing the audit
* log necessary to avoid a hard log rotation. DO NOT SET THIS VALUE TO 0
* as the kernel does an unsigned compare, plus we want to leave a few blocks
* free so userspace can terminate the log, etc.
*/
#define AUDIT_HARD_LIMIT_FREE_BLOCKS 4
/*
* Triggers for the audit daemon.
*/
#define AUDIT_TRIGGER_MIN 1
#define AUDIT_TRIGGER_LOW_SPACE 1 /* Below low watermark. */
#define AUDIT_TRIGGER_ROTATE_KERNEL 2 /* Kernel requests rotate. */
#define AUDIT_TRIGGER_READ_FILE 3 /* Re-read config file. */
#define AUDIT_TRIGGER_CLOSE_AND_DIE 4 /* Terminate audit. */
#define AUDIT_TRIGGER_NO_SPACE 5 /* Below min free space. */
#define AUDIT_TRIGGER_ROTATE_USER 6 /* User requests rotate. */
#define AUDIT_TRIGGER_INITIALIZE 7 /* User initialize of auditd. */
#define AUDIT_TRIGGER_EXPIRE_TRAILS 8 /* User expiration of trails. */
#define AUDIT_TRIGGER_MAX 8
/*
* The special device filename (FreeBSD).
*/
#define AUDITDEV_FILENAME "audit"
#define AUDIT_TRIGGER_FILE ("/dev/" AUDITDEV_FILENAME)
/*
* Pre-defined audit IDs
*/
#define AU_DEFAUDITID (uid_t)(-1)
#define AU_DEFAUDITSID 0
#define AU_ASSIGN_ASID -1
/*
* IPC types.
*/
#define AT_IPC_MSG ((u_char)1) /* Message IPC id. */
#define AT_IPC_SEM ((u_char)2) /* Semaphore IPC id. */
#define AT_IPC_SHM ((u_char)3) /* Shared mem IPC id. */
/*
* Audit conditions.
*/
#define AUC_UNSET 0
#define AUC_AUDITING 1
#define AUC_NOAUDIT 2
#define AUC_DISABLED -1
/*
* auditon(2) commands.
*/
#define A_OLDGETPOLICY 2
#define A_OLDSETPOLICY 3
#define A_GETKMASK 4
#define A_SETKMASK 5
#define A_OLDGETQCTRL 6
#define A_OLDSETQCTRL 7
#define A_GETCWD 8
#define A_GETCAR 9
#define A_GETSTAT 12
#define A_SETSTAT 13
#define A_SETUMASK 14
#define A_SETSMASK 15
#define A_OLDGETCOND 20
#define A_OLDSETCOND 21
#define A_GETCLASS 22
#define A_SETCLASS 23
#define A_GETPINFO 24
#define A_SETPMASK 25
#define A_SETFSIZE 26
#define A_GETFSIZE 27
#define A_GETPINFO_ADDR 28
#define A_GETKAUDIT 29
#define A_SETKAUDIT 30
#define A_SENDTRIGGER 31
#define A_GETSINFO_ADDR 32
#define A_GETPOLICY 33
#define A_SETPOLICY 34
#define A_GETQCTRL 35
#define A_SETQCTRL 36
#define A_GETCOND 37
#define A_SETCOND 38
#define A_GETEVENT 39 /* Get audit event-to-name mapping. */
#define A_SETEVENT 40 /* Set audit event-to-name mapping. */
/*
* Audit policy controls.
*/
#define AUDIT_CNT 0x0001
#define AUDIT_AHLT 0x0002
#define AUDIT_ARGV 0x0004
#define AUDIT_ARGE 0x0008
#define AUDIT_SEQ 0x0010
#define AUDIT_WINDATA 0x0020
#define AUDIT_USER 0x0040
#define AUDIT_GROUP 0x0080
#define AUDIT_TRAIL 0x0100
#define AUDIT_PATH 0x0200
#define AUDIT_SCNT 0x0400
#define AUDIT_PUBLIC 0x0800
#define AUDIT_ZONENAME 0x1000
#define AUDIT_PERZONE 0x2000
/*
* Default audit queue control parameters.
*/
#define AQ_HIWATER 100
#define AQ_MAXHIGH 10000
#define AQ_LOWATER 10
#define AQ_BUFSZ MAXAUDITDATA
#define AQ_MAXBUFSZ 1048576
/*
* Default minimum percentage free space on file system.
*/
#define AU_FS_MINFREE 20
/*
* Type definitions used indicating the length of variable length addresses
* in tokens containing addresses, such as header fields.
*/
#define AU_IPv4 4
#define AU_IPv6 16
__BEGIN_DECLS
typedef uid_t au_id_t;
typedef pid_t au_asid_t;
typedef u_int16_t au_event_t;
typedef u_int16_t au_emod_t;
typedef u_int32_t au_class_t;
typedef u_int64_t au_asflgs_t __attribute__ ((aligned (8)));
struct au_tid {
u_int32_t port; /* XXX dev_t compatibility */
u_int32_t machine;
};
typedef struct au_tid au_tid_t;
struct au_tid_addr {
u_int32_t at_port; /* XXX dev_t compatibility */
u_int32_t at_type;
u_int32_t at_addr[4];
};
typedef struct au_tid_addr au_tid_addr_t;
struct au_mask {
unsigned int am_success; /* Success bits. */
unsigned int am_failure; /* Failure bits. */
};
typedef struct au_mask au_mask_t;
struct auditinfo {
au_id_t ai_auid; /* Audit user ID. */
au_mask_t ai_mask; /* Audit masks. */
au_tid_t ai_termid; /* Terminal ID. */
au_asid_t ai_asid; /* Audit session ID. */
};
typedef struct auditinfo auditinfo_t;
struct auditinfo_addr {
au_id_t ai_auid; /* Audit user ID. */
au_mask_t ai_mask; /* Audit masks. */
au_tid_addr_t ai_termid; /* Terminal ID. */
au_asid_t ai_asid; /* Audit session ID. */
au_asflgs_t ai_flags; /* Audit session flags. */
};
typedef struct auditinfo_addr auditinfo_addr_t;
struct auditpinfo {
pid_t ap_pid; /* ID of target process. */
au_id_t ap_auid; /* Audit user ID. */
au_mask_t ap_mask; /* Audit masks. */
au_tid_t ap_termid; /* Terminal ID. */
au_asid_t ap_asid; /* Audit session ID. */
};
typedef struct auditpinfo auditpinfo_t;
struct auditpinfo_addr {
pid_t ap_pid; /* ID of target process. */
au_id_t ap_auid; /* Audit user ID. */
au_mask_t ap_mask; /* Audit masks. */
au_tid_addr_t ap_termid; /* Terminal ID. */
au_asid_t ap_asid; /* Audit session ID. */
au_asflgs_t ap_flags; /* Audit session flags. */
};
typedef struct auditpinfo_addr auditpinfo_addr_t;
struct au_session {
auditinfo_addr_t *as_aia_p; /* Ptr to full audit info. */
au_mask_t as_mask; /* Process Audit Masks. */
};
typedef struct au_session au_session_t;
/*
* Contents of token_t are opaque outside of libbsm.
*/
typedef struct au_token token_t;
/*
* Kernel audit queue control parameters:
* Default: Maximum:
* aq_hiwater: AQ_HIWATER (100) AQ_MAXHIGH (10000)
* aq_lowater: AQ_LOWATER (10) <aq_hiwater
* aq_bufsz: AQ_BUFSZ (32767) AQ_MAXBUFSZ (1048576)
* aq_delay: 20 20000 (not used)
*/
struct au_qctrl {
int aq_hiwater; /* Max # of audit recs in queue when */
/* threads with new ARs get blocked. */
int aq_lowater; /* # of audit recs in queue when */
/* blocked threads get unblocked. */
int aq_bufsz; /* Max size of audit record for audit(2). */
int aq_delay; /* Queue delay (not used). */
int aq_minfree; /* Minimum filesystem percent free space. */
};
typedef struct au_qctrl au_qctrl_t;
/*
* Structure for the audit statistics.
*/
struct audit_stat {
unsigned int as_version;
unsigned int as_numevent;
int as_generated;
int as_nonattrib;
int as_kernel;
int as_audit;
int as_auditctl;
int as_enqueue;
int as_written;
int as_wblocked;
int as_rblocked;
int as_dropped;
int as_totalsize;
unsigned int as_memused;
};
typedef struct audit_stat au_stat_t;
/*
* Structure for the audit file statistics.
*/
struct audit_fstat {
u_int64_t af_filesz;
u_int64_t af_currsz;
};
typedef struct audit_fstat au_fstat_t;
/*
* Audit to event class mapping.
*/
struct au_evclass_map {
au_event_t ec_number;
au_class_t ec_class;
};
typedef struct au_evclass_map au_evclass_map_t;
/*
* Event-to-name mapping.
*/
#define EVNAMEMAP_NAME_SIZE 64
struct au_evname_map {
au_event_t en_number;
char en_name[EVNAMEMAP_NAME_SIZE];
};
typedef struct au_evname_map au_evname_map_t;
/*
* Audit system calls.
*/
#if !defined(_KERNEL) && !defined(KERNEL)
int audit(const void *, int);
int auditon(int, void *, int);
int auditctl(const char *);
int getauid(au_id_t *);
int setauid(const au_id_t *);
int getaudit(struct auditinfo *);
int setaudit(const struct auditinfo *);
int getaudit_addr(struct auditinfo_addr *, int);
int setaudit_addr(const struct auditinfo_addr *, int);
#ifdef __APPLE_API_PRIVATE
#include <mach/port.h>
mach_port_name_t audit_session_self(void);
au_asid_t audit_session_join(mach_port_name_t port);
#endif /* __APPLE_API_PRIVATE */
#endif /* defined(_KERNEL) || defined(KERNEL) */
__END_DECLS
#endif /* !_BSM_AUDIT_H */
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