/* 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_watch; struct audit_tree; struct audit_chunk; struct audit_entry { struct list_head list; struct rcu_head rcu; struct audit_krule rule; }; #ifdef CONFIG_AUDIT extern int audit_enabled; extern int audit_ever_enabled; #endif 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 *); extern int selinux_audit_rule_update(void); extern struct mutex audit_filter_mutex; extern void audit_free_rule_rcu(struct rcu_head *); extern struct list_head audit_filter_list[]; extern struct audit_entry *audit_dupe_rule(struct audit_krule *old); /* audit watch functions */ #ifdef CONFIG_AUDIT_WATCH extern void audit_put_watch(struct audit_watch *watch); extern void audit_get_watch(struct audit_watch *watch); extern int audit_to_watch(struct audit_krule *krule, char *path, int len, u32 op); extern int audit_add_watch(struct audit_krule *krule, struct list_head **list); extern void audit_remove_watch_rule(struct audit_krule *krule); extern char *audit_watch_path(struct audit_watch *watch); extern int audit_watch_compare(struct audit_watch *watch, unsigned long ino, dev_t dev); #else #define audit_put_watch(w) {} #define audit_get_watch(w) {} #define audit_to_watch(k, p, l, o) (-EINVAL) #define audit_add_watch(k, l) (-EINVAL) #define audit_remove_watch_rule(k) BUG() #define audit_watch_path(w) "" #define audit_watch_compare(w, i, d) 0 #endif /* CONFIG_AUDIT_WATCH */ #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 const char *audit_tree_path(struct audit_tree *); extern void audit_put_tree(struct audit_tree *); extern void audit_kill_trees(struct list_head *); #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 */ #define audit_kill_trees(list) BUG() #endif extern char *audit_unpack_string(void **, size_t *, size_t); extern pid_t audit_sig_pid; extern uid_t audit_sig_uid; extern u32 audit_sig_sid; #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 void audit_filter_inodes(struct task_struct *, struct audit_context *); extern struct list_head *audit_killed_trees(void); #else #define audit_signal_info(s,t) AUDIT_DISABLED #define audit_filter_inodes(t,c) AUDIT_DISABLED #endif extern struct mutex audit_cmd_mutex;