/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * AppArmor security module
 *
 * This file contains AppArmor auditing function definitions.
 *
 * Copyright (C) 1998-2008 Novell/SUSE
 * Copyright 2009-2010 Canonical Ltd.
 */

#ifndef __AA_AUDIT_H
#define __AA_AUDIT_H

#include <linux/audit.h>
#include <linux/fs.h>
#include <linux/lsm_audit.h>
#include <linux/sched.h>
#include <linux/slab.h>

#include "file.h"
#include "label.h"

extern const char *const audit_mode_names[];
#define AUDIT_MAX_INDEX 5
enum audit_mode {
        AUDIT_NORMAL,           /* follow normal auditing of accesses */
        AUDIT_QUIET_DENIED,     /* quiet all denied access messages */
        AUDIT_QUIET,            /* quiet all messages */
        AUDIT_NOQUIET,          /* do not quiet audit messages */
        AUDIT_ALL               /* audit all accesses */
};

enum audit_type {
        AUDIT_APPARMOR_AUDIT,
        AUDIT_APPARMOR_ALLOWED,
        AUDIT_APPARMOR_DENIED,
        AUDIT_APPARMOR_HINT,
        AUDIT_APPARMOR_STATUS,
        AUDIT_APPARMOR_ERROR,
        AUDIT_APPARMOR_KILL,
        AUDIT_APPARMOR_AUTO
};

#define OP_NULL NULL

#define OP_SYSCTL "sysctl"
#define OP_CAPABLE "capable"

#define OP_UNLINK "unlink"
#define OP_MKDIR "mkdir"
#define OP_RMDIR "rmdir"
#define OP_MKNOD "mknod"
#define OP_TRUNC "truncate"
#define OP_LINK "link"
#define OP_SYMLINK "symlink"
#define OP_RENAME_SRC "rename_src"
#define OP_RENAME_DEST "rename_dest"
#define OP_CHMOD "chmod"
#define OP_CHOWN "chown"
#define OP_GETATTR "getattr"
#define OP_OPEN "open"

#define OP_FRECEIVE "file_receive"
#define OP_FPERM "file_perm"
#define OP_FLOCK "file_lock"
#define OP_FMMAP "file_mmap"
#define OP_FMPROT "file_mprotect"
#define OP_INHERIT "file_inherit"

#define OP_PIVOTROOT "pivotroot"
#define OP_MOUNT "mount"
#define OP_UMOUNT "umount"

#define OP_CREATE "create"
#define OP_POST_CREATE "post_create"
#define OP_BIND "bind"
#define OP_CONNECT "connect"
#define OP_LISTEN "listen"
#define OP_ACCEPT "accept"
#define OP_SENDMSG "sendmsg"
#define OP_RECVMSG "recvmsg"
#define OP_GETSOCKNAME "getsockname"
#define OP_GETPEERNAME "getpeername"
#define OP_GETSOCKOPT "getsockopt"
#define OP_SETSOCKOPT "setsockopt"
#define OP_SHUTDOWN "socket_shutdown"

#define OP_PTRACE "ptrace"
#define OP_SIGNAL "signal"

#define OP_EXEC "exec"

#define OP_CHANGE_HAT "change_hat"
#define OP_CHANGE_PROFILE "change_profile"
#define OP_CHANGE_ONEXEC "change_onexec"
#define OP_STACK "stack"
#define OP_STACK_ONEXEC "stack_onexec"

#define OP_SETPROCATTR "setprocattr"
#define OP_SETRLIMIT "setrlimit"

#define OP_PROF_REPL "profile_replace"
#define OP_PROF_LOAD "profile_load"
#define OP_PROF_RM "profile_remove"

#define OP_USERNS_CREATE "userns_create"

#define OP_URING_OVERRIDE "uring_override"
#define OP_URING_SQPOLL "uring_sqpoll"

struct apparmor_audit_data {
        int error;
        int type;
        u16 class;
        const char *op;
        const struct cred *subj_cred;
        struct aa_label *subj_label;
        const char *name;
        const char *info;
        u32 request;
        u32 denied;
        u32 tags;

        union {
                /* these entries require a custom callback fn */
                struct {
                        struct aa_label *peer;
                        union {
                                struct {
                                        const char *target;
                                        kuid_t ouid;
                                } fs;
                                struct {
                                        int rlim;
                                        unsigned long max;
                                } rlim;
                                struct {
                                        int signal;
                                        int unmappedsig;
                                };
                                struct {
                                        int type, protocol;
                                        void *addr;
                                        int addrlen;
                                        struct {
                                                void *addr;
                                                int addrlen;
                                        } peer;
                                } net;
                        };
                };
                struct {
                        struct aa_profile *profile;
                        const char *ns;
                        long pos;
                } iface;
                struct {
                        const char *src_name;
                        const char *type;
                        const char *trans;
                        const char *data;
                        unsigned long flags;
                } mnt;
                struct {
                        struct aa_label *target;
                } uring;
        };

        struct common_audit_data common;
};

/* macros for dealing with  apparmor_audit_data structure */
#define aad(SA) (container_of(SA, struct apparmor_audit_data, common))
#define aad_of_va(VA) aad((struct common_audit_data *)(VA))

#define DEFINE_AUDIT_DATA(NAME, T, C, X)                                \
        /* TODO: cleanup audit init so we don't need _aad = {0,} */     \
        struct apparmor_audit_data NAME = {                             \
                .class = (C),                                           \
                .op = (X),                                              \
                .common.type = (T),                                     \
                .common.u.tsk = NULL,                                   \
                .common.apparmor_audit_data = &NAME,                    \
        };

void aa_audit_msg(int type, struct apparmor_audit_data *ad,
                  void (*cb) (struct audit_buffer *, void *));
int aa_audit(int type, struct aa_profile *profile,
             struct apparmor_audit_data *ad,
             void (*cb) (struct audit_buffer *, void *));

#define aa_audit_error(ERROR, AD, CB)                           \
({                                                              \
        (AD)->error = (ERROR);                                  \
        aa_audit_msg(AUDIT_APPARMOR_ERROR, (AD), (CB));         \
        (AD)->error;                                    \
})


static inline int complain_error(int error)
{
        if (error == -EPERM || error == -EACCES)
                return 0;
        return error;
}

void aa_audit_rule_free(void *vrule);
int aa_audit_rule_init(u32 field, u32 op, char *rulestr, void **vrule, gfp_t gfp);
int aa_audit_rule_known(struct audit_krule *rule);
int aa_audit_rule_match(struct lsm_prop *prop, u32 field, u32 op, void *vrule);

#endif /* __AA_AUDIT_H */