1// SPDX-License-Identifier: GPL-2.0
2
3#include "bcachefs.h"
4#include "errcode.h"
5#include "trace.h"
6
7#include <linux/errname.h>
8
9static const char * const bch2_errcode_strs[] = {
10#define x(class, err) [BCH_ERR_##err - BCH_ERR_START] = #err,
11	BCH_ERRCODES()
12#undef x
13	NULL
14};
15
16static unsigned bch2_errcode_parents[] = {
17#define x(class, err) [BCH_ERR_##err - BCH_ERR_START] = class,
18	BCH_ERRCODES()
19#undef x
20};
21
22const char *bch2_err_str(int err)
23{
24	const char *errstr;
25
26	err = abs(err);
27
28	BUG_ON(err >= BCH_ERR_MAX);
29
30	if (err >= BCH_ERR_START)
31		errstr = bch2_errcode_strs[err - BCH_ERR_START];
32	else if (err)
33		errstr = errname(err);
34	else
35		errstr = "(No error)";
36	return errstr ?: "(Invalid error)";
37}
38
39bool __bch2_err_matches(int err, int class)
40{
41	err	= abs(err);
42	class	= abs(class);
43
44	BUG_ON(err	>= BCH_ERR_MAX);
45	BUG_ON(class	>= BCH_ERR_MAX);
46
47	while (err >= BCH_ERR_START && err != class)
48		err = bch2_errcode_parents[err - BCH_ERR_START];
49
50	return err == class;
51}
52
53int __bch2_err_class(int bch_err)
54{
55	int std_err = -bch_err;
56	BUG_ON((unsigned) std_err >= BCH_ERR_MAX);
57
58	while (std_err >= BCH_ERR_START && bch2_errcode_parents[std_err - BCH_ERR_START])
59		std_err = bch2_errcode_parents[std_err - BCH_ERR_START];
60
61	trace_error_downcast(bch_err, std_err, _RET_IP_);
62
63	return -std_err;
64}
65
66const char *bch2_blk_status_to_str(blk_status_t status)
67{
68	if (status == BLK_STS_REMOVED)
69		return "device removed";
70	return blk_status_to_str(status);
71}
72