// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2008 IBM Corporation
 * Author: Mimi Zohar <zohar@us.ibm.com>
 *
 * File: integrity_audit.c
 *      Audit calls for the integrity subsystem
 */

#include <linux/fs.h>
#include <linux/gfp.h>
#include <linux/audit.h>
#include "integrity.h"

static int integrity_audit_info;

/* ima_audit_setup - enable informational auditing messages */
static int __init integrity_audit_setup(char *str)
{
        unsigned long audit;

        if (!kstrtoul(str, 0, &audit))
                integrity_audit_info = audit ? 1 : 0;
        return 1;
}
__setup("integrity_audit=", integrity_audit_setup);

void integrity_audit_msg(int audit_msgno, struct inode *inode,
                         const unsigned char *fname, const char *op,
                         const char *cause, int result, int audit_info)
{
        integrity_audit_message(audit_msgno, inode, fname, op, cause,
                                result, audit_info, 0);
}

void integrity_audit_message(int audit_msgno, struct inode *inode,
                             const unsigned char *fname, const char *op,
                             const char *cause, int result, int audit_info,
                             int errno)
{
        struct audit_buffer *ab;
        char name[TASK_COMM_LEN];

        if (!integrity_audit_info && audit_info == 1)   /* Skip info messages */
                return;

        ab = audit_log_start(audit_context(), GFP_KERNEL, audit_msgno);
        if (!ab)
                return;
        audit_log_format(ab, "pid=%d uid=%u auid=%u ses=%u",
                         task_pid_nr(current),
                         from_kuid(&init_user_ns, current_uid()),
                         from_kuid(&init_user_ns, audit_get_loginuid(current)),
                         audit_get_sessionid(current));
        audit_log_task_context(ab);
        audit_log_format(ab, " op=%s cause=%s comm=", op, cause);
        audit_log_untrustedstring(ab, get_task_comm(name, current));
        if (fname) {
                audit_log_format(ab, " name=");
                audit_log_untrustedstring(ab, fname);
        }
        if (inode) {
                audit_log_format(ab, " dev=");
                audit_log_untrustedstring(ab, inode->i_sb->s_id);
                audit_log_format(ab, " ino=%lu", inode->i_ino);
        }
        audit_log_format(ab, " res=%d errno=%d", !result, errno);
        audit_log_end(ab);
}