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13#include <stdio.h>
14#include <string.h>
15#if HAVE_UNISTD_H
16#include <unistd.h>
17#endif
18#include <fcntl.h>
19#include <time.h>
20#if HAVE_SYS_STAT_H
21#include <sys/stat.h>
22#endif
23#if HAVE_SYS_TYPES_H
24#include <sys/types.h>
25#endif
26
27#include "ext2_fs.h"
28#include "ext2fs.h"
29
30
31
32
33
34#define EXT2_CHECK_MAGIC(struct, code) \
35 if ((struct)->magic != (code)) return (code)
36
37struct test_private_data {
38 int magic;
39 io_channel real;
40 int flags;
41 FILE *outfile;
42 unsigned long block;
43 int read_abort_count, write_abort_count;
44 void (*read_blk)(unsigned long block, int count, errcode_t err);
45 void (*write_blk)(unsigned long block, int count, errcode_t err);
46 void (*set_blksize)(int blksize, errcode_t err);
47 void (*write_byte)(unsigned long block, int count, errcode_t err);
48};
49
50static errcode_t test_open(const char *name, int flags, io_channel *channel);
51static errcode_t test_close(io_channel channel);
52static errcode_t test_set_blksize(io_channel channel, int blksize);
53static errcode_t test_read_blk(io_channel channel, unsigned long block,
54 int count, void *data);
55static errcode_t test_write_blk(io_channel channel, unsigned long block,
56 int count, const void *data);
57static errcode_t test_flush(io_channel channel);
58static errcode_t test_write_byte(io_channel channel, unsigned long offset,
59 int count, const void *buf);
60static errcode_t test_set_option(io_channel channel, const char *option,
61 const char *arg);
62
63static struct struct_io_manager struct_test_manager = {
64 EXT2_ET_MAGIC_IO_MANAGER,
65 "Test I/O Manager",
66 test_open,
67 test_close,
68 test_set_blksize,
69 test_read_blk,
70 test_write_blk,
71 test_flush,
72 test_write_byte,
73 test_set_option
74};
75
76io_manager test_io_manager = &struct_test_manager;
77
78
79
80
81
82io_manager test_io_backing_manager = 0;
83void (*test_io_cb_read_blk)
84 (unsigned long block, int count, errcode_t err) = 0;
85void (*test_io_cb_write_blk)
86 (unsigned long block, int count, errcode_t err) = 0;
87void (*test_io_cb_set_blksize)
88 (int blksize, errcode_t err) = 0;
89void (*test_io_cb_write_byte)
90 (unsigned long block, int count, errcode_t err) = 0;
91
92
93
94
95#define TEST_FLAG_READ 0x01
96#define TEST_FLAG_WRITE 0x02
97#define TEST_FLAG_SET_BLKSIZE 0x04
98#define TEST_FLAG_FLUSH 0x08
99#define TEST_FLAG_DUMP 0x10
100#define TEST_FLAG_SET_OPTION 0x20
101
102static void test_dump_block(io_channel channel,
103 struct test_private_data *data,
104 unsigned long block, const void *buf)
105{
106 const unsigned char *cp;
107 FILE *f = data->outfile;
108 int i;
109 unsigned long cksum = 0;
110
111 for (i=0, cp = buf; i < channel->block_size; i++, cp++) {
112 cksum += *cp;
113 }
114 fprintf(f, "Contents of block %lu, checksum %08lu:\n", block, cksum);
115 for (i=0, cp = buf; i < channel->block_size; i++, cp++) {
116 if ((i % 16) == 0)
117 fprintf(f, "%04x: ", i);
118 fprintf(f, "%02x%c", *cp, ((i % 16) == 15) ? '\n' : ' ');
119 }
120}
121
122static void test_abort(io_channel channel, unsigned long block)
123{
124 struct test_private_data *data;
125 FILE *f;
126
127 data = (struct test_private_data *) channel->private_data;
128 f = data->outfile;
129 test_flush(channel);
130
131 fprintf(f, "Aborting due to I/O to block %lu\n", block);
132 fflush(f);
133 abort();
134}
135
136static errcode_t test_open(const char *name, int flags, io_channel *channel)
137{
138 io_channel io = NULL;
139 struct test_private_data *data = NULL;
140 errcode_t retval;
141 char *value;
142
143 if (name == 0)
144 return EXT2_ET_BAD_DEVICE_NAME;
145 retval = ext2fs_get_mem(sizeof(struct struct_io_channel), &io);
146 if (retval)
147 return retval;
148 memset(io, 0, sizeof(struct struct_io_channel));
149 io->magic = EXT2_ET_MAGIC_IO_CHANNEL;
150 retval = ext2fs_get_mem(sizeof(struct test_private_data), &data);
151 if (retval) {
152 retval = EXT2_ET_NO_MEMORY;
153 goto cleanup;
154 }
155 io->manager = test_io_manager;
156 retval = ext2fs_get_mem(strlen(name)+1, &io->name);
157 if (retval)
158 goto cleanup;
159
160 strcpy(io->name, name);
161 io->private_data = data;
162 io->block_size = 1024;
163 io->read_error = 0;
164 io->write_error = 0;
165 io->refcount = 1;
166
167 memset(data, 0, sizeof(struct test_private_data));
168 data->magic = EXT2_ET_MAGIC_TEST_IO_CHANNEL;
169 if (test_io_backing_manager) {
170 retval = test_io_backing_manager->open(name, flags,
171 &data->real);
172 if (retval)
173 goto cleanup;
174 } else
175 data->real = 0;
176 data->read_blk = test_io_cb_read_blk;
177 data->write_blk = test_io_cb_write_blk;
178 data->set_blksize = test_io_cb_set_blksize;
179 data->write_byte = test_io_cb_write_byte;
180
181 data->outfile = NULL;
182 if ((value = getenv("TEST_IO_LOGFILE")) != NULL)
183 data->outfile = fopen_for_write(value);
184 if (!data->outfile)
185 data->outfile = stderr;
186
187 data->flags = 0;
188 if ((value = getenv("TEST_IO_FLAGS")) != NULL)
189 data->flags = strtoul(value, NULL, 0);
190
191 data->block = 0;
192 if ((value = getenv("TEST_IO_BLOCK")) != NULL)
193 data->block = strtoul(value, NULL, 0);
194
195 data->read_abort_count = 0;
196 if ((value = getenv("TEST_IO_READ_ABORT")) != NULL)
197 data->read_abort_count = strtoul(value, NULL, 0);
198
199 data->write_abort_count = 0;
200 if ((value = getenv("TEST_IO_WRITE_ABORT")) != NULL)
201 data->write_abort_count = strtoul(value, NULL, 0);
202
203 *channel = io;
204 return 0;
205
206cleanup:
207 ext2fs_free_mem(&io);
208 ext2fs_free_mem(&data);
209 return retval;
210}
211
212static errcode_t test_close(io_channel channel)
213{
214 struct test_private_data *data;
215 errcode_t retval = 0;
216
217 EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
218 data = (struct test_private_data *) channel->private_data;
219 EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_TEST_IO_CHANNEL);
220
221 if (--channel->refcount > 0)
222 return 0;
223
224 if (data->real)
225 retval = io_channel_close(data->real);
226
227 if (data->outfile && data->outfile != stderr)
228 fclose(data->outfile);
229
230 ext2fs_free_mem(&channel->private_data);
231 ext2fs_free_mem(&channel->name);
232 ext2fs_free_mem(&channel);
233 return retval;
234}
235
236static errcode_t test_set_blksize(io_channel channel, int blksize)
237{
238 struct test_private_data *data;
239 errcode_t retval = 0;
240
241 EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
242 data = (struct test_private_data *) channel->private_data;
243 EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_TEST_IO_CHANNEL);
244
245 if (data->real)
246 retval = io_channel_set_blksize(data->real, blksize);
247 if (data->set_blksize)
248 data->set_blksize(blksize, retval);
249 if (data->flags & TEST_FLAG_SET_BLKSIZE)
250 fprintf(data->outfile,
251 "Test_io: set_blksize(%d) returned %s\n",
252 blksize, retval ? error_message(retval) : "OK");
253 channel->block_size = blksize;
254 return retval;
255}
256
257
258static errcode_t test_read_blk(io_channel channel, unsigned long block,
259 int count, void *buf)
260{
261 struct test_private_data *data;
262 errcode_t retval = 0;
263
264 EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
265 data = (struct test_private_data *) channel->private_data;
266 EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_TEST_IO_CHANNEL);
267
268 if (data->real)
269 retval = io_channel_read_blk(data->real, block, count, buf);
270 if (data->read_blk)
271 data->read_blk(block, count, retval);
272 if (data->flags & TEST_FLAG_READ)
273 fprintf(data->outfile,
274 "Test_io: read_blk(%lu, %d) returned %s\n",
275 block, count, retval ? error_message(retval) : "OK");
276 if (data->block && data->block == block) {
277 if (data->flags & TEST_FLAG_DUMP)
278 test_dump_block(channel, data, block, buf);
279 if (--data->read_abort_count == 0)
280 test_abort(channel, block);
281 }
282 return retval;
283}
284
285static errcode_t test_write_blk(io_channel channel, unsigned long block,
286 int count, const void *buf)
287{
288 struct test_private_data *data;
289 errcode_t retval = 0;
290
291 EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
292 data = (struct test_private_data *) channel->private_data;
293 EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_TEST_IO_CHANNEL);
294
295 if (data->real)
296 retval = io_channel_write_blk(data->real, block, count, buf);
297 if (data->write_blk)
298 data->write_blk(block, count, retval);
299 if (data->flags & TEST_FLAG_WRITE)
300 fprintf(data->outfile,
301 "Test_io: write_blk(%lu, %d) returned %s\n",
302 block, count, retval ? error_message(retval) : "OK");
303 if (data->block && data->block == block) {
304 if (data->flags & TEST_FLAG_DUMP)
305 test_dump_block(channel, data, block, buf);
306 if (--data->write_abort_count == 0)
307 test_abort(channel, block);
308 }
309 return retval;
310}
311
312static errcode_t test_write_byte(io_channel channel, unsigned long offset,
313 int count, const void *buf)
314{
315 struct test_private_data *data;
316 errcode_t retval = 0;
317
318 EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
319 data = (struct test_private_data *) channel->private_data;
320 EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_TEST_IO_CHANNEL);
321
322 if (data->real && data->real->manager->write_byte)
323 retval = io_channel_write_byte(data->real, offset, count, buf);
324 if (data->write_byte)
325 data->write_byte(offset, count, retval);
326 if (data->flags & TEST_FLAG_WRITE)
327 fprintf(data->outfile,
328 "Test_io: write_byte(%lu, %d) returned %s\n",
329 offset, count, retval ? error_message(retval) : "OK");
330 return retval;
331}
332
333
334
335
336static errcode_t test_flush(io_channel channel)
337{
338 struct test_private_data *data;
339 errcode_t retval = 0;
340
341 EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
342 data = (struct test_private_data *) channel->private_data;
343 EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_TEST_IO_CHANNEL);
344
345 if (data->real)
346 retval = io_channel_flush(data->real);
347
348 if (data->flags & TEST_FLAG_FLUSH)
349 fprintf(data->outfile, "Test_io: flush() returned %s\n",
350 retval ? error_message(retval) : "OK");
351
352 return retval;
353}
354
355static errcode_t test_set_option(io_channel channel, const char *option,
356 const char *arg)
357{
358 struct test_private_data *data;
359 errcode_t retval = 0;
360
361 EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
362 data = (struct test_private_data *) channel->private_data;
363 EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_TEST_IO_CHANNEL);
364
365
366 if (data->flags & TEST_FLAG_SET_OPTION)
367 fprintf(data->outfile, "Test_io: set_option(%s, %s) ",
368 option, arg);
369 if (data->real && data->real->manager->set_option) {
370 retval = (data->real->manager->set_option)(data->real,
371 option, arg);
372 if (data->flags & TEST_FLAG_SET_OPTION)
373 fprintf(data->outfile, "returned %s\n",
374 retval ? error_message(retval) : "OK");
375 } else {
376 if (data->flags & TEST_FLAG_SET_OPTION)
377 fprintf(data->outfile, "not implemented\n");
378 }
379 return retval;
380}
381
