[PATCH] PM: Fix SMP races in the freezer
[linux-block.git] / kernel / audit.h
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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/fs.h>
23#include <linux/audit.h>
9044e6bc 24#include <linux/skbuff.h>
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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. */
35enum 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 */
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56struct audit_parent;
57
58struct audit_watch {
59 atomic_t count; /* reference count */
60 char *path; /* insertion path */
61 dev_t dev; /* associated superblock device */
62 unsigned long ino; /* associated inode number */
63 struct audit_parent *parent; /* associated parent */
64 struct list_head wlist; /* entry in parent->watches list */
65 struct list_head rules; /* associated rules */
66};
67
93315ed6 68struct audit_field {
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69 u32 type;
70 u32 val;
71 u32 op;
72 char *se_str;
73 struct selinux_audit_rule *se_rule;
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74};
75
76struct audit_krule {
77 int vers_ops;
78 u32 flags;
79 u32 listnr;
80 u32 action;
81 u32 mask[AUDIT_BITMASK_SIZE];
82 u32 buflen; /* for data alloc on list rules */
83 u32 field_count;
5adc8a6a 84 char *filterkey; /* ties events to rules */
93315ed6 85 struct audit_field *fields;
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86 struct audit_field *inode_f; /* quick access to an inode field */
87 struct audit_watch *watch; /* associated watch */
88 struct list_head rlist; /* entry in audit_watch.rules list */
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89};
90
fe7752ba 91struct audit_entry {
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92 struct list_head list;
93 struct rcu_head rcu;
94 struct audit_krule rule;
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95};
96
fe7752ba 97extern int audit_pid;
fe7752ba 98
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99#define AUDIT_INODE_BUCKETS 32
100extern struct list_head audit_inode_hash[AUDIT_INODE_BUCKETS];
101
102static inline int audit_hash_ino(u32 ino)
103{
104 return (ino & (AUDIT_INODE_BUCKETS-1));
105}
106
55669bfa 107extern int audit_match_class(int class, unsigned syscall);
f368c07d 108extern int audit_comparator(const u32 left, const u32 op, const u32 right);
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109extern int audit_compare_dname_path(const char *dname, const char *path,
110 int *dirlen);
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111extern struct sk_buff * audit_make_reply(int pid, int seq, int type,
112 int done, int multi,
113 void *payload, int size);
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114extern void audit_send_reply(int pid, int seq, int type,
115 int done, int multi,
116 void *payload, int size);
117extern void audit_log_lost(const char *message);
118extern void audit_panic(const char *message);
3dc7e315 119
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120struct audit_netlink_list {
121 int pid;
122 struct sk_buff_head q;
123};
124
125int audit_send_list(void *);
126
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127struct inotify_watch;
128extern void audit_free_parent(struct inotify_watch *);
129extern void audit_handle_ievent(struct inotify_watch *, u32, u32, u32,
130 const char *, struct inode *);
3dc7e315 131extern int selinux_audit_rule_update(void);
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132
133#ifdef CONFIG_AUDITSYSCALL
134extern void __audit_signal_info(int sig, struct task_struct *t);
135static inline void audit_signal_info(int sig, struct task_struct *t)
136{
137 if (unlikely(audit_pid && t->tgid == audit_pid))
138 __audit_signal_info(sig, t);
139}
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140extern enum audit_state audit_filter_inodes(struct task_struct *,
141 struct audit_context *);
142extern void audit_set_auditable(struct audit_context *);
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143#else
144#define audit_signal_info(s,t)
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145#define audit_filter_inodes(t,c) AUDIT_DISABLED
146#define audit_set_auditable(c)
e1396065 147#endif