182 lines
5.9 KiB
C
182 lines
5.9 KiB
C
/* audit -- definition of audit_context structure and supporting types
|
|
*
|
|
* Copyright 2003-2004 Red Hat, Inc.
|
|
* Copyright 2005 Hewlett-Packard Development Company, L.P.
|
|
* Copyright 2005 IBM Corporation
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#include <linux/fs.h>
|
|
#include <linux/audit.h>
|
|
#include <linux/skbuff.h>
|
|
|
|
/* 0 = no checking
|
|
1 = put_count checking
|
|
2 = verbose put_count checking
|
|
*/
|
|
#define AUDIT_DEBUG 0
|
|
|
|
/* At task start time, the audit_state is set in the audit_context using
|
|
a per-task filter. At syscall entry, the audit_state is augmented by
|
|
the syscall filter. */
|
|
enum audit_state {
|
|
AUDIT_DISABLED, /* Do not create per-task audit_context.
|
|
* No syscall-specific audit records can
|
|
* be generated. */
|
|
AUDIT_SETUP_CONTEXT, /* Create the per-task audit_context,
|
|
* but don't necessarily fill it in at
|
|
* syscall entry time (i.e., filter
|
|
* instead). */
|
|
AUDIT_BUILD_CONTEXT, /* Create the per-task audit_context,
|
|
* and always fill it in at syscall
|
|
* entry time. This makes a full
|
|
* syscall record available if some
|
|
* other part of the kernel decides it
|
|
* should be recorded. */
|
|
AUDIT_RECORD_CONTEXT /* Create the per-task audit_context,
|
|
* always fill it in at syscall entry
|
|
* time, and always write out the audit
|
|
* record at syscall exit time. */
|
|
};
|
|
|
|
/* Rule lists */
|
|
struct audit_parent;
|
|
|
|
struct audit_watch {
|
|
atomic_t count; /* reference count */
|
|
char *path; /* insertion path */
|
|
dev_t dev; /* associated superblock device */
|
|
unsigned long ino; /* associated inode number */
|
|
struct audit_parent *parent; /* associated parent */
|
|
struct list_head wlist; /* entry in parent->watches list */
|
|
struct list_head rules; /* associated rules */
|
|
};
|
|
|
|
struct audit_field {
|
|
u32 type;
|
|
u32 val;
|
|
u32 op;
|
|
char *se_str;
|
|
struct selinux_audit_rule *se_rule;
|
|
};
|
|
|
|
struct audit_tree;
|
|
struct audit_chunk;
|
|
|
|
struct audit_krule {
|
|
int vers_ops;
|
|
u32 flags;
|
|
u32 listnr;
|
|
u32 action;
|
|
u32 mask[AUDIT_BITMASK_SIZE];
|
|
u32 buflen; /* for data alloc on list rules */
|
|
u32 field_count;
|
|
char *filterkey; /* ties events to rules */
|
|
struct audit_field *fields;
|
|
struct audit_field *arch_f; /* quick access to arch field */
|
|
struct audit_field *inode_f; /* quick access to an inode field */
|
|
struct audit_watch *watch; /* associated watch */
|
|
struct audit_tree *tree; /* associated watched tree */
|
|
struct list_head rlist; /* entry in audit_{watch,tree}.rules list */
|
|
};
|
|
|
|
struct audit_entry {
|
|
struct list_head list;
|
|
struct rcu_head rcu;
|
|
struct audit_krule rule;
|
|
};
|
|
|
|
extern int audit_pid;
|
|
|
|
#define AUDIT_INODE_BUCKETS 32
|
|
extern struct list_head audit_inode_hash[AUDIT_INODE_BUCKETS];
|
|
|
|
static inline int audit_hash_ino(u32 ino)
|
|
{
|
|
return (ino & (AUDIT_INODE_BUCKETS-1));
|
|
}
|
|
|
|
extern int audit_match_class(int class, unsigned syscall);
|
|
extern int audit_comparator(const u32 left, const u32 op, const u32 right);
|
|
extern int audit_compare_dname_path(const char *dname, const char *path,
|
|
int *dirlen);
|
|
extern struct sk_buff * audit_make_reply(int pid, int seq, int type,
|
|
int done, int multi,
|
|
void *payload, int size);
|
|
extern void audit_send_reply(int pid, int seq, int type,
|
|
int done, int multi,
|
|
void *payload, int size);
|
|
extern void audit_panic(const char *message);
|
|
|
|
struct audit_netlink_list {
|
|
int pid;
|
|
struct sk_buff_head q;
|
|
};
|
|
|
|
int audit_send_list(void *);
|
|
|
|
struct inotify_watch;
|
|
extern void audit_free_parent(struct inotify_watch *);
|
|
extern void audit_handle_ievent(struct inotify_watch *, u32, u32, u32,
|
|
const char *, struct inode *);
|
|
extern int selinux_audit_rule_update(void);
|
|
|
|
extern struct mutex audit_filter_mutex;
|
|
extern void audit_free_rule_rcu(struct rcu_head *);
|
|
|
|
#ifdef CONFIG_AUDIT_TREE
|
|
extern struct audit_chunk *audit_tree_lookup(const struct inode *);
|
|
extern void audit_put_chunk(struct audit_chunk *);
|
|
extern int audit_tree_match(struct audit_chunk *, struct audit_tree *);
|
|
extern int audit_make_tree(struct audit_krule *, char *, u32);
|
|
extern int audit_add_tree_rule(struct audit_krule *);
|
|
extern int audit_remove_tree_rule(struct audit_krule *);
|
|
extern void audit_trim_trees(void);
|
|
extern int audit_tag_tree(char *old, char *new);
|
|
extern void audit_schedule_prune(void);
|
|
extern void audit_prune_trees(void);
|
|
extern const char *audit_tree_path(struct audit_tree *);
|
|
extern void audit_put_tree(struct audit_tree *);
|
|
#else
|
|
#define audit_remove_tree_rule(rule) BUG()
|
|
#define audit_add_tree_rule(rule) -EINVAL
|
|
#define audit_make_tree(rule, str, op) -EINVAL
|
|
#define audit_trim_trees() (void)0
|
|
#define audit_put_tree(tree) (void)0
|
|
#define audit_tag_tree(old, new) -EINVAL
|
|
#define audit_tree_path(rule) "" /* never called */
|
|
#endif
|
|
|
|
extern char *audit_unpack_string(void **, size_t *, size_t);
|
|
|
|
#ifdef CONFIG_AUDITSYSCALL
|
|
extern int __audit_signal_info(int sig, struct task_struct *t);
|
|
static inline int audit_signal_info(int sig, struct task_struct *t)
|
|
{
|
|
if (unlikely((audit_pid && t->tgid == audit_pid) ||
|
|
(audit_signals && !audit_dummy_context())))
|
|
return __audit_signal_info(sig, t);
|
|
return 0;
|
|
}
|
|
extern enum audit_state audit_filter_inodes(struct task_struct *,
|
|
struct audit_context *);
|
|
extern void audit_set_auditable(struct audit_context *);
|
|
#else
|
|
#define audit_signal_info(s,t) AUDIT_DISABLED
|
|
#define audit_filter_inodes(t,c) AUDIT_DISABLED
|
|
#define audit_set_auditable(c)
|
|
#endif
|