1 #define _LARGEFILE64_SOURCE
2
3 #define LOG_TAG "f2fs_sparseblock"
4
5 #include "f2fs_sparseblock.h"
6
7 #include <errno.h>
8 #include <f2fs_fs.h>
9 #include <fcntl.h>
10 #include <linux/types.h>
11 #include <malloc.h>
12 #include <string.h>
13 #include <sys/stat.h>
14 #include <sys/types.h>
15 #include <unistd.h>
16
17 #include <log/log.h>
18
19 #define D_DISP_u32(ptr, member) \
20 do { \
21 SLOGV("%-30s" \
22 "\t\t[0x%#08x : %u]\n", \
23 #member, le32_to_cpu((ptr)->member), le32_to_cpu((ptr)->member)); \
24 } while (0);
25
26 #define D_DISP_u64(ptr, member) \
27 do { \
28 SLOGV("%-30s" \
29 "\t\t[0x%#016llx : %llu]\n", \
30 #member, le64_to_cpu((ptr)->member), le64_to_cpu((ptr)->member)); \
31 } while (0);
32
33 #define segno_in_journal(jnl, i) ((jnl)->sit_j.entries[i].segno)
34
35 #define sit_in_journal(jnl, i) ((jnl)->sit_j.entries[i].se)
36
dbg_print_raw_sb_info(struct f2fs_super_block * sb)37 static void dbg_print_raw_sb_info(struct f2fs_super_block* sb) {
38 SLOGV("\n");
39 SLOGV("+--------------------------------------------------------+\n");
40 SLOGV("| Super block |\n");
41 SLOGV("+--------------------------------------------------------+\n");
42
43 D_DISP_u32(sb, magic);
44 D_DISP_u32(sb, major_ver);
45 D_DISP_u32(sb, minor_ver);
46 D_DISP_u32(sb, log_sectorsize);
47 D_DISP_u32(sb, log_sectors_per_block);
48
49 D_DISP_u32(sb, log_blocksize);
50 D_DISP_u32(sb, log_blocks_per_seg);
51 D_DISP_u32(sb, segs_per_sec);
52 D_DISP_u32(sb, secs_per_zone);
53 D_DISP_u32(sb, checksum_offset);
54 D_DISP_u64(sb, block_count);
55
56 D_DISP_u32(sb, section_count);
57 D_DISP_u32(sb, segment_count);
58 D_DISP_u32(sb, segment_count_ckpt);
59 D_DISP_u32(sb, segment_count_sit);
60 D_DISP_u32(sb, segment_count_nat);
61
62 D_DISP_u32(sb, segment_count_ssa);
63 D_DISP_u32(sb, segment_count_main);
64 D_DISP_u32(sb, segment0_blkaddr);
65
66 D_DISP_u32(sb, cp_blkaddr);
67 D_DISP_u32(sb, sit_blkaddr);
68 D_DISP_u32(sb, nat_blkaddr);
69 D_DISP_u32(sb, ssa_blkaddr);
70 D_DISP_u32(sb, main_blkaddr);
71
72 D_DISP_u32(sb, root_ino);
73 D_DISP_u32(sb, node_ino);
74 D_DISP_u32(sb, meta_ino);
75 D_DISP_u32(sb, cp_payload);
76 SLOGV("\n");
77 }
dbg_print_raw_ckpt_struct(struct f2fs_checkpoint * cp)78 static void dbg_print_raw_ckpt_struct(struct f2fs_checkpoint* cp) {
79 SLOGV("\n");
80 SLOGV("+--------------------------------------------------------+\n");
81 SLOGV("| Checkpoint |\n");
82 SLOGV("+--------------------------------------------------------+\n");
83
84 D_DISP_u64(cp, checkpoint_ver);
85 D_DISP_u64(cp, user_block_count);
86 D_DISP_u64(cp, valid_block_count);
87 D_DISP_u32(cp, rsvd_segment_count);
88 D_DISP_u32(cp, overprov_segment_count);
89 D_DISP_u32(cp, free_segment_count);
90
91 D_DISP_u32(cp, alloc_type[CURSEG_HOT_NODE]);
92 D_DISP_u32(cp, alloc_type[CURSEG_WARM_NODE]);
93 D_DISP_u32(cp, alloc_type[CURSEG_COLD_NODE]);
94 D_DISP_u32(cp, cur_node_segno[0]);
95 D_DISP_u32(cp, cur_node_segno[1]);
96 D_DISP_u32(cp, cur_node_segno[2]);
97
98 D_DISP_u32(cp, cur_node_blkoff[0]);
99 D_DISP_u32(cp, cur_node_blkoff[1]);
100 D_DISP_u32(cp, cur_node_blkoff[2]);
101
102 D_DISP_u32(cp, alloc_type[CURSEG_HOT_DATA]);
103 D_DISP_u32(cp, alloc_type[CURSEG_WARM_DATA]);
104 D_DISP_u32(cp, alloc_type[CURSEG_COLD_DATA]);
105 D_DISP_u32(cp, cur_data_segno[0]);
106 D_DISP_u32(cp, cur_data_segno[1]);
107 D_DISP_u32(cp, cur_data_segno[2]);
108
109 D_DISP_u32(cp, cur_data_blkoff[0]);
110 D_DISP_u32(cp, cur_data_blkoff[1]);
111 D_DISP_u32(cp, cur_data_blkoff[2]);
112
113 D_DISP_u32(cp, ckpt_flags);
114 D_DISP_u32(cp, cp_pack_total_block_count);
115 D_DISP_u32(cp, cp_pack_start_sum);
116 D_DISP_u32(cp, valid_node_count);
117 D_DISP_u32(cp, valid_inode_count);
118 D_DISP_u32(cp, next_free_nid);
119 D_DISP_u32(cp, sit_ver_bitmap_bytesize);
120 D_DISP_u32(cp, nat_ver_bitmap_bytesize);
121 D_DISP_u32(cp, checksum_offset);
122 D_DISP_u64(cp, elapsed_time);
123
124 D_DISP_u32(cp, sit_nat_version_bitmap[0]);
125 SLOGV("\n\n");
126 }
127
dbg_print_info_struct(struct f2fs_info * info)128 static void dbg_print_info_struct(struct f2fs_info* info) {
129 SLOGV("\n");
130 SLOGV("+--------------------------------------------------------+\n");
131 SLOGV("| F2FS_INFO |\n");
132 SLOGV("+--------------------------------------------------------+\n");
133 SLOGV("blocks_per_segment: %" PRIu64, info->blocks_per_segment);
134 SLOGV("block_size: %d", info->block_size);
135 SLOGV("sit_bmp loc: %p", info->sit_bmp);
136 SLOGV("sit_bmp_size: %d", info->sit_bmp_size);
137 SLOGV("blocks_per_sit: %" PRIu64, info->blocks_per_sit);
138 SLOGV("sit_blocks loc: %p", info->sit_blocks);
139 SLOGV("sit_sums loc: %p", info->sit_sums);
140 SLOGV("sit_sums num: %d", le16_to_cpu(info->sit_sums->journal.n_sits));
141 unsigned int i;
142 for (i = 0; i < (le16_to_cpu(info->sit_sums->journal.n_sits)); i++) {
143 SLOGV("entry %d in journal entries is for segment %d", i,
144 le32_to_cpu(segno_in_journal(&info->sit_sums->journal, i)));
145 }
146
147 SLOGV("cp_blkaddr: %" PRIu64, info->cp_blkaddr);
148 SLOGV("cp_valid_cp_blkaddr: %" PRIu64, info->cp_valid_cp_blkaddr);
149 SLOGV("sit_blkaddr: %" PRIu64, info->sit_blkaddr);
150 SLOGV("nat_blkaddr: %" PRIu64, info->nat_blkaddr);
151 SLOGV("ssa_blkaddr: %" PRIu64, info->ssa_blkaddr);
152 SLOGV("main_blkaddr: %" PRIu64, info->main_blkaddr);
153 SLOGV("total_user_used: %" PRIu64, info->total_user_used);
154 SLOGV("total_blocks: %" PRIu64, info->total_blocks);
155 SLOGV("\n\n");
156 }
157
158 /* read blocks */
read_structure(int fd,unsigned long long start,void * buf,ssize_t len)159 static int read_structure(int fd, unsigned long long start, void* buf, ssize_t len) {
160 off64_t ret;
161
162 ret = lseek64(fd, start, SEEK_SET);
163 if (ret < 0) {
164 SLOGE("failed to seek\n");
165 return ret;
166 }
167
168 ret = read(fd, buf, len);
169 if (ret < 0) {
170 SLOGE("failed to read\n");
171 return ret;
172 }
173 if (ret != len) {
174 SLOGE("failed to read all\n");
175 return -1;
176 }
177 return 0;
178 }
179
read_structure_blk(int fd,unsigned long long start_blk,void * buf,size_t len)180 static int read_structure_blk(int fd, unsigned long long start_blk, void* buf, size_t len) {
181 return read_structure(fd, F2FS_BLKSIZE * start_blk, buf, F2FS_BLKSIZE * len);
182 }
183
read_f2fs_sb(int fd,struct f2fs_super_block * sb)184 static int read_f2fs_sb(int fd, struct f2fs_super_block* sb) {
185 int rc;
186 rc = read_structure(fd, F2FS_SUPER_OFFSET, sb, sizeof(*sb));
187 if (le32_to_cpu(sb->magic) != F2FS_SUPER_MAGIC) {
188 SLOGE("Not a valid F2FS super block. Magic:%#08x != %#08x", le32_to_cpu(sb->magic),
189 F2FS_SUPER_MAGIC);
190 return -1;
191 }
192 return 0;
193 }
194
get_f2fs_filesystem_size_sec(char * dev)195 unsigned int get_f2fs_filesystem_size_sec(char* dev) {
196 int fd;
197 if ((fd = open(dev, O_RDONLY)) < 0) {
198 SLOGE("Cannot open device to get filesystem size ");
199 return 0;
200 }
201 struct f2fs_super_block sb;
202 if (read_f2fs_sb(fd, &sb)) return 0;
203 return (unsigned int)(le64_to_cpu(sb.block_count) * F2FS_BLKSIZE / DEFAULT_SECTOR_SIZE);
204 }
205
validate_checkpoint(block_t cp_addr,unsigned long long * version,int fd)206 static struct f2fs_checkpoint* validate_checkpoint(block_t cp_addr, unsigned long long* version,
207 int fd) {
208 unsigned char *cp_block_1, *cp_block_2;
209 struct f2fs_checkpoint* cp_block;
210 uint64_t cp1_version = 0, cp2_version = 0;
211
212 cp_block_1 = malloc(F2FS_BLKSIZE);
213 if (!cp_block_1) return NULL;
214
215 /* Read the 1st cp block in this CP pack */
216 if (read_structure_blk(fd, cp_addr, cp_block_1, 1)) goto invalid_cp1;
217
218 /* get the version number */
219 cp_block = (struct f2fs_checkpoint*)cp_block_1;
220
221 cp1_version = le64_to_cpu(cp_block->checkpoint_ver);
222
223 cp_block_2 = malloc(F2FS_BLKSIZE);
224 if (!cp_block_2) {
225 goto invalid_cp1;
226 }
227 /* Read the 2nd cp block in this CP pack */
228 cp_addr += le32_to_cpu(cp_block->cp_pack_total_block_count) - 1;
229 if (read_structure_blk(fd, cp_addr, cp_block_2, 1)) {
230 goto invalid_cp2;
231 }
232
233 cp_block = (struct f2fs_checkpoint*)cp_block_2;
234
235 cp2_version = le64_to_cpu(cp_block->checkpoint_ver);
236
237 if (cp2_version == cp1_version) {
238 *version = cp2_version;
239 free(cp_block_2);
240 return (struct f2fs_checkpoint*)cp_block_1;
241 }
242
243 /* There must be something wrong with this checkpoint */
244 invalid_cp2:
245 free(cp_block_2);
246 invalid_cp1:
247 free(cp_block_1);
248 return NULL;
249 }
250
get_valid_checkpoint_info(int fd,struct f2fs_super_block * sb,struct f2fs_checkpoint ** cp,struct f2fs_info * info)251 int get_valid_checkpoint_info(int fd, struct f2fs_super_block* sb, struct f2fs_checkpoint** cp,
252 struct f2fs_info* info) {
253 struct f2fs_checkpoint *cp1, *cp2, *cur_cp;
254 unsigned long blk_size;
255 unsigned long long cp1_version = 0, cp2_version = 0;
256 unsigned long long cp1_start_blk_no;
257 unsigned long long cp2_start_blk_no;
258
259 blk_size = 1U << le32_to_cpu(sb->log_blocksize);
260
261 /*
262 * Find valid cp by reading both packs and finding most recent one.
263 */
264 cp1_start_blk_no = le32_to_cpu(sb->cp_blkaddr);
265 cp1 = validate_checkpoint(cp1_start_blk_no, &cp1_version, fd);
266
267 /* The second checkpoint pack should start at the next segment */
268 cp2_start_blk_no = cp1_start_blk_no + (1 << le32_to_cpu(sb->log_blocks_per_seg));
269 cp2 = validate_checkpoint(cp2_start_blk_no, &cp2_version, fd);
270
271 if (cp1 && cp2) {
272 if (ver_after(cp2_version, cp1_version)) {
273 cur_cp = cp2;
274 info->cp_valid_cp_blkaddr = cp2_start_blk_no;
275 free(cp1);
276 } else {
277 cur_cp = cp1;
278 info->cp_valid_cp_blkaddr = cp1_start_blk_no;
279 free(cp2);
280 }
281 } else if (cp1) {
282 cur_cp = cp1;
283 info->cp_valid_cp_blkaddr = cp1_start_blk_no;
284 } else if (cp2) {
285 cur_cp = cp2;
286 info->cp_valid_cp_blkaddr = cp2_start_blk_no;
287 } else {
288 goto fail_no_cp;
289 }
290
291 *cp = cur_cp;
292
293 return 0;
294
295 fail_no_cp:
296 SLOGE("Valid Checkpoint not found!!");
297 return -EINVAL;
298 }
299
gather_sit_info(int fd,struct f2fs_info * info)300 static int gather_sit_info(int fd, struct f2fs_info* info) {
301 uint64_t num_segments =
302 (info->total_blocks - info->main_blkaddr + info->blocks_per_segment - 1) /
303 info->blocks_per_segment;
304 uint64_t num_sit_blocks = (num_segments + SIT_ENTRY_PER_BLOCK - 1) / SIT_ENTRY_PER_BLOCK;
305 uint64_t sit_block;
306
307 info->sit_blocks = malloc(num_sit_blocks * sizeof(struct f2fs_sit_block));
308 if (!info->sit_blocks) return -1;
309
310 for (sit_block = 0; sit_block < num_sit_blocks; sit_block++) {
311 off64_t address = info->sit_blkaddr + sit_block;
312
313 if (f2fs_test_bit(sit_block, info->sit_bmp)) address += info->blocks_per_sit;
314
315 SLOGV("Reading cache block starting at block %" PRIu64, address);
316 if (read_structure(fd, address * F2FS_BLKSIZE, &info->sit_blocks[sit_block],
317 sizeof(struct f2fs_sit_block))) {
318 SLOGE("Could not read sit block at block %" PRIu64, address);
319 free(info->sit_blocks);
320 info->sit_blocks = NULL;
321 return -1;
322 }
323 }
324 return 0;
325 }
326
is_set_ckpt_flags(struct f2fs_checkpoint * cp,unsigned int f)327 static inline int is_set_ckpt_flags(struct f2fs_checkpoint* cp, unsigned int f) {
328 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
329 return !!(ckpt_flags & f);
330 }
331
sum_blk_addr(struct f2fs_checkpoint * cp,struct f2fs_info * info,int base,int type)332 static inline uint64_t sum_blk_addr(struct f2fs_checkpoint* cp, struct f2fs_info* info, int base,
333 int type) {
334 return info->cp_valid_cp_blkaddr + le32_to_cpu(cp->cp_pack_total_block_count) - (base + 1) +
335 type;
336 }
337
get_sit_summary(int fd,struct f2fs_info * info,struct f2fs_checkpoint * cp)338 static int get_sit_summary(int fd, struct f2fs_info* info, struct f2fs_checkpoint* cp) {
339 char buffer[F2FS_BLKSIZE];
340
341 info->sit_sums = calloc(1, sizeof(struct f2fs_summary_block));
342 if (!info->sit_sums) return -1;
343
344 /* CURSEG_COLD_DATA where the journaled SIT entries are. */
345 if (is_set_ckpt_flags(cp, CP_COMPACT_SUM_FLAG)) {
346 if (read_structure_blk(fd, info->cp_valid_cp_blkaddr + le32_to_cpu(cp->cp_pack_start_sum),
347 buffer, 1))
348 return -1;
349 memcpy(&info->sit_sums->journal.n_sits, &buffer[SUM_JOURNAL_SIZE], SUM_JOURNAL_SIZE);
350 } else {
351 uint64_t blk_addr;
352 if (is_set_ckpt_flags(cp, CP_UMOUNT_FLAG))
353 blk_addr = sum_blk_addr(cp, info, NR_CURSEG_TYPE, CURSEG_COLD_DATA);
354 else
355 blk_addr = sum_blk_addr(cp, info, NR_CURSEG_DATA_TYPE, CURSEG_COLD_DATA);
356
357 if (read_structure_blk(fd, blk_addr, buffer, 1)) return -1;
358
359 memcpy(info->sit_sums, buffer, sizeof(struct f2fs_summary_block));
360 }
361 return 0;
362 }
363
generate_f2fs_info(int fd)364 struct f2fs_info* generate_f2fs_info(int fd) {
365 struct f2fs_super_block* sb = NULL;
366 struct f2fs_checkpoint* cp = NULL;
367 struct f2fs_info* info;
368
369 info = calloc(1, sizeof(*info));
370 if (!info) {
371 SLOGE("Out of memory!");
372 return NULL;
373 }
374
375 sb = malloc(sizeof(*sb));
376 if (!sb) {
377 SLOGE("Out of memory!");
378 free(info);
379 return NULL;
380 }
381 if (read_f2fs_sb(fd, sb)) {
382 SLOGE("Failed to read superblock");
383 free(info);
384 free(sb);
385 return NULL;
386 }
387 dbg_print_raw_sb_info(sb);
388
389 info->cp_blkaddr = le32_to_cpu(sb->cp_blkaddr);
390 info->sit_blkaddr = le32_to_cpu(sb->sit_blkaddr);
391 info->nat_blkaddr = le32_to_cpu(sb->nat_blkaddr);
392 info->ssa_blkaddr = le32_to_cpu(sb->ssa_blkaddr);
393 info->main_blkaddr = le32_to_cpu(sb->main_blkaddr);
394 info->block_size = F2FS_BLKSIZE;
395 info->total_blocks = sb->block_count;
396 info->blocks_per_sit = (le32_to_cpu(sb->segment_count_sit) >> 1)
397 << le32_to_cpu(sb->log_blocks_per_seg);
398 info->blocks_per_segment = 1U << le32_to_cpu(sb->log_blocks_per_seg);
399
400 if (get_valid_checkpoint_info(fd, sb, &cp, info)) goto error;
401 dbg_print_raw_ckpt_struct(cp);
402
403 info->total_user_used = le32_to_cpu(cp->valid_block_count);
404
405 u32 bmp_size = le32_to_cpu(cp->sit_ver_bitmap_bytesize);
406
407 /* get sit validity bitmap */
408 info->sit_bmp = malloc(bmp_size);
409 if (!info->sit_bmp) {
410 SLOGE("Out of memory!");
411 goto error;
412 }
413
414 info->sit_bmp_size = bmp_size;
415 if (read_structure(fd,
416 info->cp_valid_cp_blkaddr * F2FS_BLKSIZE +
417 offsetof(struct f2fs_checkpoint, sit_nat_version_bitmap),
418 info->sit_bmp, bmp_size)) {
419 SLOGE("Error getting SIT validity bitmap");
420 goto error;
421 }
422
423 if (gather_sit_info(fd, info)) {
424 SLOGE("Error getting SIT information");
425 goto error;
426 }
427 if (get_sit_summary(fd, info, cp)) {
428 SLOGE("Error getting SIT entries in summary area");
429 goto error;
430 }
431 dbg_print_info_struct(info);
432 return info;
433 error:
434 free(sb);
435 free(cp);
436 free_f2fs_info(info);
437 return NULL;
438 }
439
free_f2fs_info(struct f2fs_info * info)440 void free_f2fs_info(struct f2fs_info* info) {
441 if (info) {
442 free(info->sit_blocks);
443 info->sit_blocks = NULL;
444
445 free(info->sit_bmp);
446 info->sit_bmp = NULL;
447
448 free(info->sit_sums);
449 info->sit_sums = NULL;
450 }
451 free(info);
452 }
453
get_num_blocks_used(struct f2fs_info * info)454 uint64_t get_num_blocks_used(struct f2fs_info* info) {
455 return info->main_blkaddr + info->total_user_used;
456 }
457
f2fs_test_bit(unsigned int nr,const char * p)458 int f2fs_test_bit(unsigned int nr, const char* p) {
459 int mask;
460 char* addr = (char*)p;
461
462 addr += (nr >> 3);
463 mask = 1 << (7 - (nr & 0x07));
464 return (mask & *addr) != 0;
465 }
466
run_on_used_blocks(uint64_t startblock,struct f2fs_info * info,int (* func)(uint64_t pos,void * data),void * data)467 int run_on_used_blocks(uint64_t startblock, struct f2fs_info* info,
468 int (*func)(uint64_t pos, void* data), void* data) {
469 struct f2fs_sit_entry* sit_entry;
470 uint64_t sit_block_num_cur = 0, segnum = 0, block_offset;
471 uint64_t block;
472 unsigned int used, found, i;
473
474 block = startblock;
475 while (block < info->total_blocks) {
476 /* TODO: Save only relevant portions of metadata */
477 if (block < info->main_blkaddr) {
478 if (func(block, data)) {
479 SLOGI("func error");
480 return -1;
481 }
482 } else {
483 /* Main Section */
484 segnum = (block - info->main_blkaddr) / info->blocks_per_segment;
485
486 /* check the SIT entries in the journal */
487 found = 0;
488 for (i = 0; i < le16_to_cpu(info->sit_sums->journal.n_sits); i++) {
489 if (le32_to_cpu(segno_in_journal(&info->sit_sums->journal, i)) == segnum) {
490 sit_entry = &sit_in_journal(&info->sit_sums->journal, i);
491 found = 1;
492 break;
493 }
494 }
495
496 /* get SIT entry from SIT section */
497 if (!found) {
498 sit_block_num_cur = segnum / SIT_ENTRY_PER_BLOCK;
499 sit_entry =
500 &info->sit_blocks[sit_block_num_cur].entries[segnum % SIT_ENTRY_PER_BLOCK];
501 }
502
503 block_offset = (block - info->main_blkaddr) % info->blocks_per_segment;
504
505 if (block_offset == 0 && GET_SIT_VBLOCKS(sit_entry) == 0) {
506 block += info->blocks_per_segment;
507 continue;
508 }
509
510 used = f2fs_test_bit(block_offset, (char*)sit_entry->valid_map);
511 if (used)
512 if (func(block, data)) return -1;
513 }
514
515 block++;
516 }
517 return 0;
518 }
519
520 struct privdata {
521 int count;
522 int infd;
523 int outfd;
524 char* buf;
525 char* zbuf;
526 int done;
527 struct f2fs_info* info;
528 };
529
530 /*
531 * This is a simple test program. It performs a block to block copy of a
532 * filesystem, replacing blocks identified as unused with 0's.
533 */
534
copy_used(uint64_t pos,void * data)535 int copy_used(uint64_t pos, void* data) {
536 struct privdata* d = data;
537 char* buf;
538 int pdone = (pos * 100) / d->info->total_blocks;
539 if (pdone > d->done) {
540 d->done = pdone;
541 printf("Done with %d percent\n", d->done);
542 }
543
544 d->count++;
545 buf = d->buf;
546 if (read_structure_blk(d->infd, (unsigned long long)pos, d->buf, 1)) {
547 printf("Error reading!!!\n");
548 return -1;
549 }
550
551 off64_t ret;
552 ret = lseek64(d->outfd, pos * F2FS_BLKSIZE, SEEK_SET);
553 if (ret < 0) {
554 SLOGE("failed to seek\n");
555 return ret;
556 }
557
558 ret = write(d->outfd, d->buf, F2FS_BLKSIZE);
559 if (ret < 0) {
560 SLOGE("failed to write\n");
561 return ret;
562 }
563 if (ret != F2FS_BLKSIZE) {
564 SLOGE("failed to read all\n");
565 return -1;
566 }
567 return 0;
568 }
569
main(int argc,char ** argv)570 int main(int argc, char** argv) {
571 if (argc != 3) printf("Usage: %s fs_file_in fs_file_out\n", argv[0]);
572 char* in = argv[1];
573 char* out = argv[2];
574 int infd, outfd;
575
576 if ((infd = open(in, O_RDONLY)) < 0) {
577 SLOGE("Cannot open device");
578 return 0;
579 }
580 if ((outfd = open(out, O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR)) < 0) {
581 SLOGE("Cannot open output");
582 return 0;
583 }
584
585 struct privdata d;
586 d.infd = infd;
587 d.outfd = outfd;
588 d.count = 0;
589 struct f2fs_info* info = generate_f2fs_info(infd);
590 if (!info) {
591 printf("Failed to generate info!");
592 return -1;
593 }
594 char* buf = malloc(F2FS_BLKSIZE);
595 char* zbuf = calloc(1, F2FS_BLKSIZE);
596 d.buf = buf;
597 d.zbuf = zbuf;
598 d.done = 0;
599 d.info = info;
600 int expected_count = get_num_blocks_used(info);
601 run_on_used_blocks(0, info, ©_used, &d);
602 printf("Copied %d blocks. Expected to copy %d\n", d.count, expected_count);
603 ftruncate64(outfd, info->total_blocks * F2FS_BLKSIZE);
604 free_f2fs_info(info);
605 free(buf);
606 free(zbuf);
607 close(infd);
608 close(outfd);
609 return 0;
610 }
611