kernel/audit.h

   1 /* audit -- definition of audit_context structure and supporting types
   2  *
   3  * Copyright 2003-2004 Red Hat, Inc.
   4  * Copyright 2005 Hewlett-Packard Development Company, L.P.
   5  * Copyright 2005 IBM Corporation
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include <linux/mutex.h>
  23 #include <linux/fs.h>
  24 #include <linux/audit.h>
  25
  26 /* 0 = no checking
  27    1 = put_count checking
  28    2 = verbose put_count checking
  29 */
  30 #define AUDIT_DEBUG 0
  31
  32 /* At task start time, the audit_state is set in the audit_context using
  33    a per-task filter.  At syscall entry, the audit_state is augmented by
  34    the syscall filter. */
  35 enum audit_state {
  36         AUDIT_DISABLED,         /* Do not create per-task audit_context.
  37                                  * No syscall-specific audit records can
  38                                  * be generated. */
  39         AUDIT_SETUP_CONTEXT,    /* Create the per-task audit_context,
  40                                  * but don't necessarily fill it in at
  41                                  * syscall entry time (i.e., filter
  42                                  * instead). */
  43         AUDIT_BUILD_CONTEXT,    /* Create the per-task audit_context,
  44                                  * and always fill it in at syscall
  45                                  * entry time.  This makes a full
  46                                  * syscall record available if some
  47                                  * other part of the kernel decides it
  48                                  * should be recorded. */
  49         AUDIT_RECORD_CONTEXT    /* Create the per-task audit_context,
  50                                  * always fill it in at syscall entry
  51                                  * time, and always write out the audit
  52                                  * record at syscall exit time.  */
  53 };
  54
  55 /* Rule lists */
  56 struct audit_field {
  57         u32                     type;
  58         u32                     val;
  59         u32                     op;
  60 };
  61
  62 struct audit_krule {
  63         int                     vers_ops;
  64         u32                     flags;
  65         u32                     listnr;
  66         u32                     action;
  67         u32                     mask[AUDIT_BITMASK_SIZE];
  68         u32                     buflen; /* for data alloc on list rules */
  69         u32                     field_count;
  70         struct audit_field      *fields;
  71 };
  72
  73 struct audit_entry {
  74         struct list_head        list;
  75         struct rcu_head         rcu;
  76         struct audit_krule      rule;
  77 };
  78
  79
  80 extern int audit_pid;
  81 extern int audit_comparator(const u32 left, const u32 op, const u32 right);
  82
  83 extern void                 audit_send_reply(int pid, int seq, int type,
  84                                              int done, int multi,
  85                                              void *payload, int size);
  86 extern void                 audit_log_lost(const char *message);
  87 extern void                 audit_panic(const char *message);
  88 extern struct mutex audit_netlink_mutex;