/* 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_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 list_head rlist; /* entry in audit_watch.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); #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