audit.h
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- /* 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 _LINUX_AUDIT_H_
- #define _LINUX_AUDIT_H_
- #include <linux/sched.h>
- #include <linux/elf.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 - 1999 future use
- * 2000 is for otherwise unclassified kernel audit messages
- *
- * Messages from 1000-1199 are bi-directional. 1200-1299 are exclusively user
- * space. Anything over that 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 filtering rules */
- #define AUDIT_ADD 1003 /* Add syscall filtering rule */
- #define AUDIT_DEL 1004 /* Delete syscall filtering rule */
- #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_FIRST_USER_MSG 1100 /* Userspace messages mostly uninteresting to kernel */
- #define AUDIT_USER_AVC 1107 /* We filter this differently */
- #define AUDIT_LAST_USER_MSG 1199
-
- #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 /* Filesystem watch event */
- #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_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_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_NR_FILTERS 5
- #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_BITMASK_SIZE 64
- #define AUDIT_WORD(nr) ((__u32)((nr)/32))
- #define AUDIT_BIT(nr) (1 << ((nr) - AUDIT_WORD(nr)*32))
- /* 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
- /* 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_ARG0 200
- #define AUDIT_ARG1 (AUDIT_ARG0+1)
- #define AUDIT_ARG2 (AUDIT_ARG0+2)
- #define AUDIT_ARG3 (AUDIT_ARG0+3)
- #define AUDIT_NEGATE 0x80000000
- /* 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
- /* Failure-to-log actions */
- #define AUDIT_FAIL_SILENT 0
- #define AUDIT_FAIL_PRINTK 1
- #define AUDIT_FAIL_PANIC 2
- /* distinguish syscall tables */
- #define __AUDIT_ARCH_64BIT 0x80000000
- #define __AUDIT_ARCH_LE 0x40000000
- #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_H8300 (EM_H8_300)
- #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_MIPS (EM_MIPS)
- #define AUDIT_ARCH_MIPSEL (EM_MIPS|__AUDIT_ARCH_LE)
- #define AUDIT_ARCH_MIPS64 (EM_MIPS|__AUDIT_ARCH_64BIT)
- #define AUDIT_ARCH_MIPSEL64 (EM_MIPS|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
- #define AUDIT_ARCH_PARISC (EM_PARISC)
- #define AUDIT_ARCH_PARISC64 (EM_PARISC|__AUDIT_ARCH_64BIT)
- #define AUDIT_ARCH_PPC (EM_PPC)
- #define AUDIT_ARCH_PPC64 (EM_PPC64|__AUDIT_ARCH_64BIT)
- #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_V850 (EM_V850|__AUDIT_ARCH_LE)
- #define AUDIT_ARCH_X86_64 (EM_X86_64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
- 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 */
- };
- struct audit_rule { /* for AUDIT_LIST, AUDIT_ADD, and AUDIT_DEL */
- __u32 flags; /* AUDIT_PER_{TASK,CALL}, AUDIT_PREPEND */
- __u32 action; /* AUDIT_NEVER, AUDIT_POSSIBLE, AUDIT_ALWAYS */
- __u32 field_count;
- __u32 mask[AUDIT_BITMASK_SIZE];
- __u32 fields[AUDIT_MAX_FIELDS];
- __u32 values[AUDIT_MAX_FIELDS];
- };
- #ifdef __KERNEL__
- struct audit_sig_info {
- uid_t uid;
- pid_t pid;
- };
- struct audit_buffer;
- struct audit_context;
- struct inode;
- struct netlink_skb_parms;
- #define AUDITSC_INVALID 0
- #define AUDITSC_SUCCESS 1
- #define AUDITSC_FAILURE 2
- #define AUDITSC_RESULT(x) ( ((long)(x))<0?AUDITSC_FAILURE:AUDITSC_SUCCESS )
- #ifdef CONFIG_AUDITSYSCALL
- /* These are defined in auditsc.c */
- /* Public API */
- extern int audit_alloc(struct task_struct *task);
- extern void audit_free(struct task_struct *task);
- extern void audit_syscall_entry(struct task_struct *task, int arch,
- int major, unsigned long a0, unsigned long a1,
- unsigned long a2, unsigned long a3);
- extern void audit_syscall_exit(struct task_struct *task, int failed, long return_code);
- extern void audit_getname(const char *name);
- extern void audit_putname(const char *name);
- extern void audit_inode(const char *name, const struct inode *inode, unsigned flags);
- /* Private API (for audit.c only) */
- extern int audit_receive_filter(int type, int pid, int uid, int seq,
- void *data, uid_t loginuid);
- extern unsigned int audit_serial(void);
- extern void auditsc_get_stamp(struct audit_context *ctx,
- struct timespec *t, unsigned int *serial);
- extern int audit_set_loginuid(struct task_struct *task, uid_t loginuid);
- extern uid_t audit_get_loginuid(struct audit_context *ctx);
- extern int audit_ipc_perms(unsigned long qbytes, uid_t uid, gid_t gid, mode_t mode);
- extern int audit_socketcall(int nargs, unsigned long *args);
- extern int audit_sockaddr(int len, void *addr);
- extern int audit_avc_path(struct dentry *dentry, struct vfsmount *mnt);
- extern void audit_signal_info(int sig, struct task_struct *t);
- extern int audit_filter_user(struct netlink_skb_parms *cb, int type);
- #else
- #define audit_alloc(t) ({ 0; })
- #define audit_free(t) do { ; } while (0)
- #define audit_syscall_entry(t,ta,a,b,c,d,e) do { ; } while (0)
- #define audit_syscall_exit(t,f,r) do { ; } while (0)
- #define audit_getname(n) do { ; } while (0)
- #define audit_putname(n) do { ; } while (0)
- #define audit_inode(n,i,f) do { ; } while (0)
- #define audit_receive_filter(t,p,u,s,d,l) ({ -EOPNOTSUPP; })
- #define auditsc_get_stamp(c,t,s) do { BUG(); } while (0)
- #define audit_get_loginuid(c) ({ -1; })
- #define audit_ipc_perms(q,u,g,m) ({ 0; })
- #define audit_socketcall(n,a) ({ 0; })
- #define audit_sockaddr(len, addr) ({ 0; })
- #define audit_avc_path(dentry, mnt) ({ 0; })
- #define audit_signal_info(s,t) do { ; } while (0)
- #define audit_filter_user(cb,t) ({ 1; })
- #endif
- #ifdef CONFIG_AUDIT
- /* These are defined in audit.c */
- /* Public API */
- extern void audit_log(struct audit_context *ctx, int gfp_mask,
- int type, const char *fmt, ...)
- __attribute__((format(printf,4,5)));
- extern struct audit_buffer *audit_log_start(struct audit_context *ctx, int gfp_mask, int type);
- extern void audit_log_format(struct audit_buffer *ab,
- const char *fmt, ...)
- __attribute__((format(printf,2,3)));
- extern void audit_log_end(struct audit_buffer *ab);
- extern void audit_log_hex(struct audit_buffer *ab,
- const unsigned char *buf,
- size_t len);
- extern void audit_log_untrustedstring(struct audit_buffer *ab,
- const char *string);
- extern void audit_log_d_path(struct audit_buffer *ab,
- const char *prefix,
- struct dentry *dentry,
- struct vfsmount *vfsmnt);
- /* Private API (for auditsc.c only) */
- extern void audit_send_reply(int pid, int seq, int type,
- int done, int multi,
- void *payload, int size);
- extern void audit_log_lost(const char *message);
- extern struct semaphore audit_netlink_sem;
- #else
- #define audit_log(c,g,t,f,...) do { ; } while (0)
- #define audit_log_start(c,g,t) ({ NULL; })
- #define audit_log_vformat(b,f,a) do { ; } while (0)
- #define audit_log_format(b,f,...) do { ; } while (0)
- #define audit_log_end(b) do { ; } while (0)
- #define audit_log_hex(a,b,l) do { ; } while (0)
- #define audit_log_untrustedstring(a,s) do { ; } while (0)
- #define audit_log_d_path(b,p,d,v) do { ; } while (0)
- #endif
- #endif
- #endif