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
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
|
/*
This file is part of UFFS, the Ultra-low-cost Flash File System.
Copyright (C) 2005-2009 Ricky Zheng <[email protected]>
UFFS is free software; you can redistribute it and/or modify it under
the GNU Library General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any
later version.
UFFS 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
or GNU Library General Public License, as applicable, for more details.
You should have received a copy of the GNU General Public License
and GNU Library General Public License along with UFFS; if not, write
to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
As a special exception, if other files instantiate templates or use
macros or inline functions from this file, or you compile this file
and link it with other works to produce a work based on this file,
this file does not by itself cause the resulting work to be covered
by the GNU General Public License. However the source code for this
file must still be made available in accordance with section (3) of
the GNU General Public License v2.
This exception does not invalidate any other reasons why a work based
on this file might be covered by the GNU General Public License.
*/
/**
* \file uffs_fileem_wrap.c
*
* \brief file emulator wrapper functions for injecting bad blocks or ECC errors.
*
* \author Ricky Zheng, created Nov, 2010
*/
#include <sys/types.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "uffs_config.h"
#include "uffs/uffs_device.h"
#include "uffs_fileem.h"
#define PFX "femu: "
#define MSGLN(msg,...) uffs_Perror(UFFS_MSG_NORMAL, msg, ## __VA_ARGS__)
#define MSG(msg,...) uffs_PerrorRaw(UFFS_MSG_NORMAL, msg, ## __VA_ARGS__)
// #define UFFS_FEMU_SHOW_FLASH_IO
#ifdef UFFS_FEMU_ENABLE_INJECTION
struct uffs_FileEmuBitFlip {
int block;
int page;
int offset;
u8 mask;
};
/* simulate bad blocks */
#define FILEEMU_STOCK_BAD_BLOCKS {5, 180} // bad block come from manufacture
#define FILEEMU_ERASE_BAD_BLOCKS {100, 150} // new bad block discovered when erasing
/* simulating bit flip */
#define FILEEMU_WRITE_BIT_FLIP \
{ \
{20, 2, 10, 1 << 4}, /* block 20, page 2, offset 10, bit 4 */ \
{24, 4, -3, 1 << 2}, /* block 24, page 4, spare offset 3, bit 2*/ \
{60, 1, 5, 1 << 3}, /* block 60, page 1, offset 5, bit 3 */ \
{66, 1, 15, 1 << 7}, /* block 66, page 1, offset 300, bit 7 */ \
{80, 2, 2, 1 << 1}, /* block 80, page 2, offset 2, bit 1 */ \
{88, 2, 100, 1 << 5}, /* block 88, page 2, offset 100, bit 5 */ \
}
static int femu_InitFlash_wrap(uffs_Device *dev);
static int femu_ReadPage_wrap(uffs_Device *dev, u32 block, u32 page, u8 *data, int data_len, u8 *ecc,
u8 *spare, int spare_len);
static int femu_ReadPageWithLayout_wrap(uffs_Device *dev, u32 block, u32 page, u8* data, int data_len, u8 *ecc,
uffs_TagStore *ts, u8 *ecc_store);
static int femu_WritePage_wrap(uffs_Device *dev, u32 block, u32 page,
const u8 *data, int data_len, const u8 *spare, int spare_len);
static int femu_WritePageWithLayout_wrap(uffs_Device *dev, u32 block, u32 page, const u8* data, int data_len, const u8 *ecc,
const uffs_TagStore *ts);
static int femu_EraseBlock_wrap(uffs_Device *dev, u32 blockNumber);
/////////////////////////////////////////////////////////////////////////////////
void femu_setup_wrapper_functions(uffs_Device *dev)
{
uffs_FileEmu *emu;
emu = (uffs_FileEmu *)(dev->attr->_private);
// setup wrap functions, for inject ECC errors, etc.
memcpy(&emu->ops_orig, dev->ops, sizeof(struct uffs_FlashOpsSt));
if (dev->ops->InitFlash)
dev->ops->InitFlash = femu_InitFlash_wrap;
if (dev->ops->EraseBlock)
dev->ops->EraseBlock = femu_EraseBlock_wrap;
if (dev->ops->ReadPage)
dev->ops->ReadPage = femu_ReadPage_wrap;
if (dev->ops->ReadPageWithLayout)
dev->ops->ReadPageWithLayout = femu_ReadPageWithLayout_wrap;
if (dev->ops->WritePage)
dev->ops->WritePage = femu_WritePage_wrap;
if (dev->ops->WritePageWithLayout)
dev->ops->WritePageWithLayout = femu_WritePageWithLayout_wrap;
}
static int femu_InitFlash_wrap(uffs_Device *dev)
{
int ret;
uffs_FileEmu *emu = (uffs_FileEmu *)(dev->attr->_private);
#ifdef FILEEMU_STOCK_BAD_BLOCKS
u32 bad_blocks[] = FILEEMU_STOCK_BAD_BLOCKS;
int j;
u8 x = 0;
struct uffs_StorageAttrSt *attr = dev->attr;
int full_page_size = attr->page_data_size + attr->spare_size;
int blk_size = full_page_size * attr->pages_per_block;
#endif
if (emu->initCount == 0) {
ret = emu->ops_orig.InitFlash(dev);
#ifdef FILEEMU_STOCK_BAD_BLOCKS
if (ret >= 0) {
for (j = 0; j < ARRAY_SIZE(bad_blocks); j++) {
if (bad_blocks[j] < dev->attr->total_blocks) {
printf(" --- manufacture bad block %d ---\n", bad_blocks[j]);
fseek(emu->fp, bad_blocks[j] * blk_size + attr->page_data_size + dev->attr->block_status_offs, SEEK_SET);
fwrite(&x, 1, 1, emu->fp);
}
}
}
#endif
}
else {
ret = emu->ops_orig.InitFlash(dev);
}
return ret;
}
static int femu_ReadPage_wrap(uffs_Device *dev, u32 block, u32 page, u8 *data, int data_len, u8 *ecc,
u8 *spare, int spare_len)
{
uffs_FileEmu *emu = (uffs_FileEmu *)(dev->attr->_private);
#ifdef UFFS_FEMU_SHOW_FLASH_IO
if (data || spare) {
MSG(PFX " Read block %d page %d", block, page);
if (data)
MSG(" DATA[%d]", data_len);
if (spare)
MSG(" SPARE[%d]", spare_len);
MSG(TENDSTR);
}
#endif
return emu->ops_orig.ReadPage(dev, block, page, data, data_len, ecc, spare, spare_len);
}
static int femu_ReadPageWithLayout_wrap(uffs_Device *dev, u32 block, u32 page, u8* data, int data_len, u8 *ecc,
uffs_TagStore *ts, u8 *ecc_store)
{
uffs_FileEmu *emu = (uffs_FileEmu *)(dev->attr->_private);
#ifdef UFFS_FEMU_SHOW_FLASH_IO
if (data || ts) {
MSG(PFX " Read block %d page %d", block, page);
if (data)
MSG(" DATA[%d]", data_len);
if (ts)
MSG(" TS");
MSG(TENDSTR);
}
#endif
return emu->ops_orig.ReadPageWithLayout(dev, block, page, data, data_len, ecc, ts, ecc_store);
}
////////////////////// wraper functions ///////////////////////////
static void InjectBitFlip(uffs_Device *dev, u32 block, u32 page)
{
#ifdef FILEEMU_WRITE_BIT_FLIP
uffs_FileEmu *emu = (uffs_FileEmu *)(dev->attr->_private);
struct uffs_FileEmuBitFlip flips[] = FILEEMU_WRITE_BIT_FLIP;
struct uffs_FileEmuBitFlip *x;
u8 buf[UFFS_MAX_PAGE_SIZE + UFFS_MAX_SPARE_SIZE];
u8 *data = buf;
u8 *spare = buf + dev->attr->page_data_size;
int full_page_size = dev->attr->page_data_size + dev->attr->spare_size;
int blk_size = full_page_size * dev->attr->pages_per_block;
int page_offset = block * blk_size + full_page_size * page;
int i;
u8 *p;
fseek(emu->fp, page_offset, SEEK_SET);
fread(buf, 1, full_page_size, emu->fp);
p = NULL;
for (i = 0; i < ARRAY_SIZE(flips); i++) {
x = &flips[i];
if (x->block == block && x->page == page) {
if (x->offset >= 0) {
printf(" --- Inject data bit flip at block%d, page%d, offset%d, mask%d --- \n", block, page, x->offset, x->mask);
p = (u8 *)(data + x->offset);
}
else {
printf(" --- Inject spare bit flip at block%d, page%d, offset%d, mask%d --- \n", block, page, -x->offset, x->mask);
p = (u8 *)(spare - x->offset);
}
*p = (*p & ~x->mask) | (~(*p & x->mask) & x->mask);
}
}
if (p) {
fseek(emu->fp, page_offset, SEEK_SET);
fwrite(buf, 1, full_page_size, emu->fp);
}
#endif
}
static int femu_WritePage_wrap(uffs_Device *dev, u32 block, u32 page,
const u8 *data, int data_len, const u8 *spare, int spare_len)
{
uffs_FileEmu *emu = (uffs_FileEmu *)(dev->attr->_private);
int ret;
#ifdef UFFS_FEMU_SHOW_FLASH_IO
if (data || spare) {
MSG(PFX " Write block %d page %d", block, page);
if (data)
MSG(" DATA[%d]", data_len);
if (spare)
MSG(" SPARE[%d]", spare_len);
MSG(TENDSTR);
}
#endif
ret = emu->ops_orig.WritePage(dev, block, page, data, data_len, spare, spare_len);
InjectBitFlip(dev, block, page);
return ret;
}
static int femu_WritePageWithLayout_wrap(uffs_Device *dev, u32 block, u32 page, const u8* data, int data_len, const u8 *ecc,
const uffs_TagStore *ts)
{
uffs_FileEmu *emu = (uffs_FileEmu *)(dev->attr->_private);
int ret;
#ifdef UFFS_FEMU_SHOW_FLASH_IO
if (data || ts) {
MSG(PFX " Write block %d page %d", block, page);
if (data)
MSG(" DATA[%d]", data_len);
if (ts)
MSG(" TS");
MSG(TENDSTR);
}
#endif
ret = emu->ops_orig.WritePageWithLayout(dev, block, page, data, data_len, ecc, ts);
InjectBitFlip(dev, block, page);
return ret;
}
static int femu_EraseBlock_wrap(uffs_Device *dev, u32 blockNumber)
{
uffs_FileEmu *emu = (uffs_FileEmu *)(dev->attr->_private);
#ifdef FILEEMU_ERASE_BAD_BLOCKS
int blocks[] = FILEEMU_ERASE_BAD_BLOCKS;
int i;
URET ret;
ret = emu->ops_orig.EraseBlock(dev, blockNumber);
for (i = 0; i < ARRAY_SIZE(blocks); i++) {
if (blockNumber == blocks[i]) {
printf(" --- Inject bad block%d when erasing --- \n", blockNumber);
ret = UFFS_FLASH_BAD_BLK;
}
}
return ret;
#else
return emu->ops_orig.EraseBlock(dev, blockNumber);
#endif
}
#endif // UFFS_FEMU_ENABLE_INJECTION
/////////////////////////////////////////////////////////////////////////////////
|
