/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2025 The FreeBSD Foundation
 * All rights reserved.
 *
 * This software were developed by Konstantin Belousov <kib@FreeBSD.org>
 * under sponsorship from the FreeBSD Foundation.
 */

#ifndef _SYS_EXTERRVAR_H_
#define _SYS_EXTERRVAR_H_

#include <sys/_exterr.h>
#include <sys/_uexterror.h>
#include <sys/exterr_cat.h>

#define UEXTERROR_MAXLEN        256

#define UEXTERROR_VER           0x10010002

#define EXTERRCTL_ENABLE        1
#define EXTERRCTL_DISABLE       2
#define EXTERRCTL_UD            3

#define EXTERRCTLF_FORCE        0x00000001

#ifdef _KERNEL

#ifndef EXTERR_CATEGORY
#error "Specify error category before including sys/exterrvar.h"
#endif

#ifdef  EXTERR_STRINGS
#define SET_ERROR_MSG(mmsg)     (mmsg)
#else
#define SET_ERROR_MSG(mmsg)     NULL
#endif

#define _SET_ERROR2_KE(kep, eerror, mmsg, pp1, pp2)     ({              \
        (kep)->error = (eerror);                                        \
        (kep)->cat = EXTERR_CATEGORY;                                   \
        (kep)->msg = SET_ERROR_MSG(mmsg);                               \
        (kep)->p1 = (pp1);                                              \
        (kep)->p2 = (pp2);                                              \
        (kep)->src_line = __LINE__;                                     \
        (kep)->error;                                                   \
})
#define _SET_ERROR0_KE(kep, eerror, mmsg)                               \
        _SET_ERROR2_KE(kep, eerror, mmsg, 0, 0)
#define _SET_ERROR1_KE(kep, eerror, mmsg, pp1)                          \
        _SET_ERROR2_KE(kep, eerror, mmsg, pp1, 0)

#define _EXTERROR_MACRO_KE(kep, eerror, mmsg, _1, _2, NAME, ...)        \
        NAME
#define EXTERROR_KE(...)                                                \
        _EXTERROR_MACRO_KE(__VA_ARGS__, _SET_ERROR2_KE, _SET_ERROR1_KE, \
            _SET_ERROR0_KE)(__VA_ARGS__)

#define _SET_ERROR2(eerror, mmsg, pp1, pp2)                             \
        exterr_set(eerror, EXTERR_CATEGORY, SET_ERROR_MSG(mmsg),        \
            (uintptr_t)(pp1), (uintptr_t)(pp2), __LINE__)
#define _SET_ERROR0(eerror, mmsg)       _SET_ERROR2(eerror, mmsg, 0, 0)
#define _SET_ERROR1(eerror, mmsg, pp1)  _SET_ERROR2(eerror, mmsg, pp1, 0)

#define _EXTERROR_MACRO(eerror, mmsg, _1, _2, NAME, ...)                \
        NAME
#define EXTERROR(...)                                                   \
        _EXTERROR_MACRO(__VA_ARGS__, _SET_ERROR2, _SET_ERROR1,          \
            _SET_ERROR0)(__VA_ARGS__)

void exterr_clear(struct kexterr *ke);
void exterr_db_print(struct kexterr *ke);
int exterr_set_from(const struct kexterr *ke);
int exterr_set(int eerror, int category, const char *mmsg, uintptr_t pp1,
    uintptr_t pp2, int line);
int exterr_to_ue(struct thread *td, struct uexterror *ue);
void ktrexterr(struct thread *td);

#else   /* !_KERNEL */

#include <sys/types.h>

__BEGIN_DECLS
int exterrctl(u_int op, u_int flags, void *ptr);
__END_DECLS

#endif  /* _KERNEL */

#endif