1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
|
/*
* Copyright (C) 2008 Nokia 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Author: Artem Bityutskiy
*
* UBI scanning library.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <stdint.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <mtd_swab.h>
#include <mtd/ubi-media.h>
#include <mtd/mtd-user.h>
#include <libmtd.h>
#include <libscan.h>
#include "common.h"
#include "crc32.h"
#define PROGRAM_NAME "libscan"
static int all_ff(const void *buf, int len)
{
int i;
const uint8_t *p = buf;
for (i = 0; i < len; i++)
if (p[i] != 0xFF)
return 0;
return 1;
}
int ubi_scan(struct mtd_dev_info *mtd, int fd, struct ubi_scan_info **info,
int verbose)
{
int eb, v = (verbose == 2), pr = (verbose == 1);
struct ubi_scan_info *si;
unsigned long long sum = 0;
si = calloc(1, sizeof(struct ubi_scan_info));
if (!si)
return sys_errmsg("cannot allocate %zd bytes of memory",
sizeof(struct ubi_scan_info));
si->ec = calloc(mtd->eb_cnt, sizeof(uint32_t));
if (!si->ec) {
sys_errmsg("cannot allocate %zd bytes of memory",
sizeof(struct ubi_scan_info));
goto out_si;
}
si->vid_hdr_offs = si->data_offs = -1;
verbose(v, "start scanning eraseblocks 0-%d", mtd->eb_cnt);
for (eb = 0; eb < mtd->eb_cnt; eb++) {
int ret;
uint32_t crc;
struct ubi_ec_hdr hdr;
unsigned long long ec;
if (v) {
normsg_cont("scanning eraseblock %d", eb);
fflush(stdout);
}
if (pr) {
printf("\r" PROGRAM_NAME ": scanning eraseblock %d -- %2lld %% complete ",
eb, (long long)(eb + 1) * 100 / mtd->eb_cnt);
fflush(stdout);
}
ret = mtd_is_bad(mtd, fd, eb);
if (ret == -1)
goto out_ec;
if (ret) {
si->bad_cnt += 1;
si->ec[eb] = EB_BAD;
if (v)
printf(": bad\n");
continue;
}
ret = mtd_read(mtd, fd, eb, 0, &hdr, sizeof(struct ubi_ec_hdr));
if (ret < 0)
goto out_ec;
/* Check the EC header */
if (be32_to_cpu(hdr.magic) != UBI_EC_HDR_MAGIC) {
if (all_ff(&hdr, sizeof(struct ubi_ec_hdr))) {
si->empty_cnt += 1;
si->ec[eb] = EB_EMPTY;
if (v)
printf(": empty\n");
} else {
si->alien_cnt += 1;
si->ec[eb] = EB_ALIEN;
if (v)
printf(": alien\n");
}
continue;
}
crc = crc32(UBI_CRC32_INIT, &hdr, UBI_EC_HDR_SIZE_CRC);
if (be32_to_cpu(hdr.hdr_crc) != crc) {
si->corrupted_cnt += 1;
si->ec[eb] = EB_CORRUPTED;
if (v)
printf(": bad CRC %#08x, should be %#08x\n",
crc, be32_to_cpu(hdr.hdr_crc));
continue;
}
ec = be64_to_cpu(hdr.ec);
if (ec > EC_MAX) {
if (pr)
printf("\n");
errmsg("erase counter in EB %d is %llu, while this "
"program expects them to be less than %u",
eb, ec, EC_MAX);
goto out_ec;
}
if (si->vid_hdr_offs == -1) {
si->vid_hdr_offs = be32_to_cpu(hdr.vid_hdr_offset);
si->data_offs = be32_to_cpu(hdr.data_offset);
if (si->data_offs % mtd->min_io_size) {
if (pr)
printf("\n");
if (v)
printf(": corrupted because of the below\n");
warnmsg("bad data offset %d at eraseblock %d (n"
"of multiple of min. I/O unit size %d)",
si->data_offs, eb, mtd->min_io_size);
warnmsg("treat eraseblock %d as corrupted", eb);
si->corrupted_cnt += 1;
si->ec[eb] = EB_CORRUPTED;
continue;
}
} else {
if ((int)be32_to_cpu(hdr.vid_hdr_offset) != si->vid_hdr_offs) {
if (pr)
printf("\n");
if (v)
printf(": corrupted because of the below\n");
warnmsg("inconsistent VID header offset: was "
"%d, but is %d in eraseblock %d",
si->vid_hdr_offs,
be32_to_cpu(hdr.vid_hdr_offset), eb);
warnmsg("treat eraseblock %d as corrupted", eb);
si->corrupted_cnt += 1;
si->ec[eb] = EB_CORRUPTED;
continue;
}
if ((int)be32_to_cpu(hdr.data_offset) != si->data_offs) {
if (pr)
printf("\n");
if (v)
printf(": corrupted because of the below\n");
warnmsg("inconsistent data offset: was %d, but"
" is %d in eraseblock %d",
si->data_offs,
be32_to_cpu(hdr.data_offset), eb);
warnmsg("treat eraseblock %d as corrupted", eb);
si->corrupted_cnt += 1;
si->ec[eb] = EB_CORRUPTED;
continue;
}
}
si->ok_cnt += 1;
si->ec[eb] = ec;
if (v)
printf(": OK, erase counter %u\n", si->ec[eb]);
}
if (si->ok_cnt != 0) {
/* Calculate mean erase counter */
for (eb = 0; eb < mtd->eb_cnt; eb++) {
if (si->ec[eb] > EC_MAX)
continue;
sum += si->ec[eb];
}
si->mean_ec = sum / si->ok_cnt;
}
si->good_cnt = mtd->eb_cnt - si->bad_cnt;
verbose(v, "finished, mean EC %lld, %d OK, %d corrupted, %d empty, %d "
"alien, bad %d", si->mean_ec, si->ok_cnt, si->corrupted_cnt,
si->empty_cnt, si->alien_cnt, si->bad_cnt);
*info = si;
if (pr)
printf("\n");
return 0;
out_ec:
free(si->ec);
out_si:
free(si);
*info = NULL;
return -1;
}
void ubi_scan_free(struct ubi_scan_info *si)
{
free(si->ec);
free(si);
}
|
