1 /*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "ext4_utils.h"
18 #include "allocate.h"
19 #include "indirect.h"
20 #include "extent.h"
21 #include "sha1.h"
22
23 #include <sparse/sparse.h>
24 #ifdef REAL_UUID
25 #include <uuid.h>
26 #endif
27
28 #include <fcntl.h>
29 #include <inttypes.h>
30 #include <sys/stat.h>
31 #include <sys/types.h>
32 #include <stddef.h>
33 #include <string.h>
34
35 #ifdef USE_MINGW
36 #include <winsock2.h>
37 #else
38 #include <arpa/inet.h>
39 #include <sys/ioctl.h>
40 #endif
41
42 #if defined(__linux__)
43 #include <linux/fs.h>
44 #elif defined(__APPLE__) && defined(__MACH__)
45 #include <sys/disk.h>
46 #endif
47
48 int force = 0;
49 struct fs_info info;
50 struct fs_aux_info aux_info;
51 struct sparse_file *ext4_sparse_file;
52 struct block_allocation *base_fs_allocations = NULL;
53
54 jmp_buf setjmp_env;
55
56 /* Definition from RFC-4122 */
57 struct uuid {
58 u32 time_low;
59 u16 time_mid;
60 u16 time_hi_and_version;
61 u8 clk_seq_hi_res;
62 u8 clk_seq_low;
63 u16 node0_1;
64 u32 node2_5;
65 };
66
sha1_hash(const char * namespace,const char * name,unsigned char sha1[SHA1_DIGEST_LENGTH])67 static void sha1_hash(const char *namespace, const char *name,
68 unsigned char sha1[SHA1_DIGEST_LENGTH])
69 {
70 SHA1_CTX ctx;
71 SHA1Init(&ctx);
72 SHA1Update(&ctx, (const u8*)namespace, strlen(namespace));
73 SHA1Update(&ctx, (const u8*)name, strlen(name));
74 SHA1Final(sha1, &ctx);
75 }
76
generate_sha1_uuid(const char * namespace,const char * name,u8 result[16])77 static void generate_sha1_uuid(const char *namespace, const char *name, u8 result[16])
78 {
79 unsigned char sha1[SHA1_DIGEST_LENGTH];
80 struct uuid *uuid = (struct uuid *)result;
81
82 sha1_hash(namespace, name, (unsigned char*)sha1);
83 memcpy(uuid, sha1, sizeof(struct uuid));
84
85 uuid->time_low = ntohl(uuid->time_low);
86 uuid->time_mid = ntohs(uuid->time_mid);
87 uuid->time_hi_and_version = ntohs(uuid->time_hi_and_version);
88 uuid->time_hi_and_version &= 0x0FFF;
89 uuid->time_hi_and_version |= (5 << 12);
90 uuid->clk_seq_hi_res &= ~(1 << 6);
91 uuid->clk_seq_hi_res |= 1 << 7;
92 }
93
94 /* returns 1 if a is a power of b */
is_power_of(int a,int b)95 static int is_power_of(int a, int b)
96 {
97 while (a > b) {
98 if (a % b)
99 return 0;
100 a /= b;
101 }
102
103 return (a == b) ? 1 : 0;
104 }
105
bitmap_get_bit(u8 * bitmap,u32 bit)106 int bitmap_get_bit(u8 *bitmap, u32 bit)
107 {
108 if (bitmap[bit / 8] & (1 << (bit % 8)))
109 return 1;
110
111 return 0;
112 }
113
bitmap_clear_bit(u8 * bitmap,u32 bit)114 void bitmap_clear_bit(u8 *bitmap, u32 bit)
115 {
116 bitmap[bit / 8] &= ~(1 << (bit % 8));
117
118 return;
119 }
120
121 /* Returns 1 if the bg contains a backup superblock. On filesystems with
122 the sparse_super feature, only block groups 0, 1, and powers of 3, 5,
123 and 7 have backup superblocks. Otherwise, all block groups have backup
124 superblocks */
ext4_bg_has_super_block(int bg)125 int ext4_bg_has_super_block(int bg)
126 {
127 /* Without sparse_super, every block group has a superblock */
128 if (!(info.feat_ro_compat & EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER))
129 return 1;
130
131 if (bg == 0 || bg == 1)
132 return 1;
133
134 if (is_power_of(bg, 3) || is_power_of(bg, 5) || is_power_of(bg, 7))
135 return 1;
136
137 return 0;
138 }
139
140 /* Function to read the primary superblock */
read_sb(int fd,struct ext4_super_block * sb)141 void read_sb(int fd, struct ext4_super_block *sb)
142 {
143 off64_t ret;
144
145 ret = lseek64(fd, 1024, SEEK_SET);
146 if (ret < 0)
147 critical_error_errno("failed to seek to superblock");
148
149 ret = read(fd, sb, sizeof(*sb));
150 if (ret < 0)
151 critical_error_errno("failed to read superblock");
152 if (ret != sizeof(*sb))
153 critical_error("failed to read all of superblock");
154 }
155
156 /* Function to write a primary or backup superblock at a given offset */
write_sb(int fd,unsigned long long offset,struct ext4_super_block * sb)157 void write_sb(int fd, unsigned long long offset, struct ext4_super_block *sb)
158 {
159 off64_t ret;
160
161 ret = lseek64(fd, offset, SEEK_SET);
162 if (ret < 0)
163 critical_error_errno("failed to seek to superblock");
164
165 ret = write(fd, sb, sizeof(*sb));
166 if (ret < 0)
167 critical_error_errno("failed to write superblock");
168 if (ret != sizeof(*sb))
169 critical_error("failed to write all of superblock");
170 }
171
block_device_write_sb(int fd)172 static void block_device_write_sb(int fd)
173 {
174 unsigned long long offset;
175 u32 i;
176
177 /* write out the backup superblocks */
178 for (i = 1; i < aux_info.groups; i++) {
179 if (ext4_bg_has_super_block(i)) {
180 offset = info.block_size * (aux_info.first_data_block
181 + i * info.blocks_per_group);
182 write_sb(fd, offset, aux_info.backup_sb[i]);
183 }
184 }
185
186 /* write out the primary superblock */
187 write_sb(fd, 1024, aux_info.sb);
188 }
189
190 /* Write the filesystem image to a file */
write_ext4_image(int fd,int gz,int sparse,int crc)191 void write_ext4_image(int fd, int gz, int sparse, int crc)
192 {
193 sparse_file_write(ext4_sparse_file, fd, gz, sparse, crc);
194
195 if (info.block_device)
196 block_device_write_sb(fd);
197 }
198
199 /* Compute the rest of the parameters of the filesystem from the basic info */
ext4_create_fs_aux_info()200 void ext4_create_fs_aux_info()
201 {
202 aux_info.first_data_block = (info.block_size > 1024) ? 0 : 1;
203 aux_info.len_blocks = info.len / info.block_size;
204 aux_info.inode_table_blocks = DIV_ROUND_UP(info.inodes_per_group * info.inode_size,
205 info.block_size);
206 aux_info.groups = DIV_ROUND_UP(aux_info.len_blocks - aux_info.first_data_block,
207 info.blocks_per_group);
208 aux_info.blocks_per_ind = info.block_size / sizeof(u32);
209 aux_info.blocks_per_dind = aux_info.blocks_per_ind * aux_info.blocks_per_ind;
210 aux_info.blocks_per_tind = aux_info.blocks_per_dind * aux_info.blocks_per_dind;
211
212 aux_info.bg_desc_blocks =
213 DIV_ROUND_UP(aux_info.groups * sizeof(struct ext2_group_desc),
214 info.block_size);
215
216 aux_info.default_i_flags = EXT4_NOATIME_FL;
217
218 u32 last_group_size = aux_info.len_blocks % info.blocks_per_group;
219 u32 last_header_size = 2 + aux_info.inode_table_blocks;
220 if (ext4_bg_has_super_block(aux_info.groups - 1))
221 last_header_size += 1 + aux_info.bg_desc_blocks +
222 info.bg_desc_reserve_blocks;
223 if (last_group_size > 0 && last_group_size < last_header_size) {
224 aux_info.groups--;
225 aux_info.len_blocks -= last_group_size;
226 }
227
228 /* A zero-filled superblock to be written firstly to the block
229 * device to mark the file-system as invalid
230 */
231 aux_info.sb_zero = calloc(1, info.block_size);
232 if (!aux_info.sb_zero)
233 critical_error_errno("calloc");
234
235 /* The write_data* functions expect only block aligned calls.
236 * This is not an issue, except when we write out the super
237 * block on a system with a block size > 1K. So, we need to
238 * deal with that here.
239 */
240 aux_info.sb_block = calloc(1, info.block_size);
241 if (!aux_info.sb_block)
242 critical_error_errno("calloc");
243
244 if (info.block_size > 1024)
245 aux_info.sb = (struct ext4_super_block *)((char *)aux_info.sb_block + 1024);
246 else
247 aux_info.sb = aux_info.sb_block;
248
249 /* Alloc an array to hold the pointers to the backup superblocks */
250 aux_info.backup_sb = calloc(aux_info.groups, sizeof(char *));
251
252 if (!aux_info.sb)
253 critical_error_errno("calloc");
254
255 aux_info.bg_desc = calloc(info.block_size, aux_info.bg_desc_blocks);
256 if (!aux_info.bg_desc)
257 critical_error_errno("calloc");
258 aux_info.xattrs = NULL;
259 }
260
ext4_free_fs_aux_info()261 void ext4_free_fs_aux_info()
262 {
263 unsigned int i;
264
265 for (i=0; i<aux_info.groups; i++) {
266 if (aux_info.backup_sb[i])
267 free(aux_info.backup_sb[i]);
268 }
269 free(aux_info.sb_block);
270 free(aux_info.sb_zero);
271 free(aux_info.bg_desc);
272 }
273
274 /* Fill in the superblock memory buffer based on the filesystem parameters */
ext4_fill_in_sb(int real_uuid)275 void ext4_fill_in_sb(int real_uuid)
276 {
277 unsigned int i;
278 struct ext4_super_block *sb = aux_info.sb;
279
280 sb->s_inodes_count = info.inodes_per_group * aux_info.groups;
281 sb->s_blocks_count_lo = aux_info.len_blocks;
282 sb->s_r_blocks_count_lo = 0;
283 sb->s_free_blocks_count_lo = 0;
284 sb->s_free_inodes_count = 0;
285 sb->s_first_data_block = aux_info.first_data_block;
286 sb->s_log_block_size = log_2(info.block_size / 1024);
287 sb->s_obso_log_frag_size = log_2(info.block_size / 1024);
288 sb->s_blocks_per_group = info.blocks_per_group;
289 sb->s_obso_frags_per_group = info.blocks_per_group;
290 sb->s_inodes_per_group = info.inodes_per_group;
291 sb->s_mtime = 0;
292 sb->s_wtime = 0;
293 sb->s_mnt_count = 0;
294 sb->s_max_mnt_count = 10;
295 sb->s_magic = EXT4_SUPER_MAGIC;
296 sb->s_state = EXT4_VALID_FS;
297 sb->s_errors = EXT4_ERRORS_RO;
298 sb->s_minor_rev_level = 0;
299 sb->s_lastcheck = 0;
300 sb->s_checkinterval = 0;
301 sb->s_creator_os = EXT4_OS_LINUX;
302 sb->s_rev_level = EXT4_DYNAMIC_REV;
303 sb->s_def_resuid = EXT4_DEF_RESUID;
304 sb->s_def_resgid = EXT4_DEF_RESGID;
305
306 sb->s_first_ino = EXT4_GOOD_OLD_FIRST_INO;
307 sb->s_inode_size = info.inode_size;
308 sb->s_block_group_nr = 0;
309 sb->s_feature_compat = info.feat_compat;
310 sb->s_feature_incompat = info.feat_incompat;
311 sb->s_feature_ro_compat = info.feat_ro_compat;
312 if (real_uuid == 1) {
313 #ifdef REAL_UUID
314 uuid_generate(sb->s_uuid);
315 #else
316 fprintf(stderr, "Not compiled with real UUID support\n");
317 abort();
318 #endif
319 } else {
320 generate_sha1_uuid("extandroid/make_ext4fs", info.label, sb->s_uuid);
321 }
322 memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name));
323 strncpy(sb->s_volume_name, info.label, sizeof(sb->s_volume_name));
324 memset(sb->s_last_mounted, 0, sizeof(sb->s_last_mounted));
325 sb->s_algorithm_usage_bitmap = 0;
326
327 sb->s_reserved_gdt_blocks = info.bg_desc_reserve_blocks;
328 sb->s_prealloc_blocks = 0;
329 sb->s_prealloc_dir_blocks = 0;
330
331 //memcpy(sb->s_journal_uuid, sb->s_uuid, sizeof(sb->s_journal_uuid));
332 if (info.feat_compat & EXT4_FEATURE_COMPAT_HAS_JOURNAL)
333 sb->s_journal_inum = EXT4_JOURNAL_INO;
334 sb->s_journal_dev = 0;
335 sb->s_last_orphan = 0;
336 sb->s_hash_seed[0] = 0; /* FIXME */
337 sb->s_def_hash_version = DX_HASH_TEA;
338 sb->s_reserved_char_pad = EXT4_JNL_BACKUP_BLOCKS;
339 sb->s_desc_size = sizeof(struct ext2_group_desc);
340 sb->s_default_mount_opts = 0; /* FIXME */
341 sb->s_first_meta_bg = 0;
342 sb->s_mkfs_time = 0;
343 //sb->s_jnl_blocks[17]; /* FIXME */
344
345 sb->s_blocks_count_hi = aux_info.len_blocks >> 32;
346 sb->s_r_blocks_count_hi = 0;
347 sb->s_free_blocks_count_hi = 0;
348 sb->s_min_extra_isize = sizeof(struct ext4_inode) -
349 EXT4_GOOD_OLD_INODE_SIZE;
350 sb->s_want_extra_isize = sizeof(struct ext4_inode) -
351 EXT4_GOOD_OLD_INODE_SIZE;
352 sb->s_flags = 2;
353 sb->s_raid_stride = 0;
354 sb->s_mmp_interval = 0;
355 sb->s_mmp_block = 0;
356 sb->s_raid_stripe_width = 0;
357 sb->s_log_groups_per_flex = 0;
358 sb->s_kbytes_written = 0;
359
360 for (i = 0; i < aux_info.groups; i++) {
361 u64 group_start_block = aux_info.first_data_block + i *
362 info.blocks_per_group;
363 u32 header_size = 0;
364 if (ext4_bg_has_super_block(i)) {
365 if (i != 0) {
366 aux_info.backup_sb[i] = calloc(info.block_size, 1);
367 memcpy(aux_info.backup_sb[i], sb, sizeof(struct ext4_super_block));
368 /* Update the block group nr of this backup superblock */
369 aux_info.backup_sb[i]->s_block_group_nr = i;
370 ext4_queue_sb(group_start_block, info.block_device ?
371 aux_info.sb_zero : aux_info.backup_sb[i]);
372 }
373 sparse_file_add_data(ext4_sparse_file, aux_info.bg_desc,
374 aux_info.bg_desc_blocks * info.block_size,
375 group_start_block + 1);
376 header_size = 1 + aux_info.bg_desc_blocks + info.bg_desc_reserve_blocks;
377 }
378
379 aux_info.bg_desc[i].bg_block_bitmap = group_start_block + header_size;
380 aux_info.bg_desc[i].bg_inode_bitmap = group_start_block + header_size + 1;
381 aux_info.bg_desc[i].bg_inode_table = group_start_block + header_size + 2;
382
383 aux_info.bg_desc[i].bg_free_blocks_count = sb->s_blocks_per_group;
384 aux_info.bg_desc[i].bg_free_inodes_count = sb->s_inodes_per_group;
385 aux_info.bg_desc[i].bg_used_dirs_count = 0;
386 }
387
388 /* Queue the primary superblock to be written out - if it's a block device,
389 * queue a zero-filled block first, the correct version of superblock will
390 * be written to the block device after all other blocks are written.
391 *
392 * The file-system on the block device will not be valid until the correct
393 * version of superblocks are written, this is to avoid the likelihood of a
394 * partially created file-system.
395 */
396 ext4_queue_sb(aux_info.first_data_block, info.block_device ?
397 aux_info.sb_zero : aux_info.sb_block);
398 }
399
400
ext4_queue_sb(u64 start_block,struct ext4_super_block * sb)401 void ext4_queue_sb(u64 start_block, struct ext4_super_block *sb)
402 {
403 sparse_file_add_data(ext4_sparse_file, sb, info.block_size, start_block);
404 }
405
ext4_parse_sb_info(struct ext4_super_block * sb)406 void ext4_parse_sb_info(struct ext4_super_block *sb)
407 {
408 if (sb->s_magic != EXT4_SUPER_MAGIC)
409 error("superblock magic incorrect");
410
411 if ((sb->s_state & EXT4_VALID_FS) != EXT4_VALID_FS)
412 error("filesystem state not valid");
413
414 ext4_parse_sb(sb, &info);
415
416 ext4_create_fs_aux_info();
417
418 memcpy(aux_info.sb, sb, sizeof(*sb));
419
420 if (aux_info.first_data_block != sb->s_first_data_block)
421 critical_error("first data block does not match");
422 }
423
ext4_create_resize_inode()424 void ext4_create_resize_inode()
425 {
426 struct block_allocation *reserve_inode_alloc = create_allocation();
427 u32 reserve_inode_len = 0;
428 unsigned int i;
429
430 struct ext4_inode *inode = get_inode(EXT4_RESIZE_INO);
431 if (inode == NULL) {
432 error("failed to get resize inode");
433 return;
434 }
435
436 for (i = 0; i < aux_info.groups; i++) {
437 if (ext4_bg_has_super_block(i)) {
438 u64 group_start_block = aux_info.first_data_block + i *
439 info.blocks_per_group;
440 u32 reserved_block_start = group_start_block + 1 +
441 aux_info.bg_desc_blocks;
442 u32 reserved_block_len = info.bg_desc_reserve_blocks;
443 append_region(reserve_inode_alloc, reserved_block_start,
444 reserved_block_len, i);
445 reserve_inode_len += reserved_block_len;
446 }
447 }
448
449 inode_attach_resize(inode, reserve_inode_alloc);
450
451 inode->i_mode = S_IFREG | S_IRUSR | S_IWUSR;
452 inode->i_links_count = 1;
453
454 free_alloc(reserve_inode_alloc);
455 }
456
457 /* Allocate the blocks to hold a journal inode and connect them to the
458 reserved journal inode */
ext4_create_journal_inode()459 void ext4_create_journal_inode()
460 {
461 struct ext4_inode *inode = get_inode(EXT4_JOURNAL_INO);
462 if (inode == NULL) {
463 error("failed to get journal inode");
464 return;
465 }
466
467 u8 *journal_data = inode_allocate_data_extents(inode,
468 info.journal_blocks * info.block_size,
469 info.journal_blocks * info.block_size);
470 if (!journal_data) {
471 error("failed to allocate extents for journal data");
472 return;
473 }
474
475 inode->i_mode = S_IFREG | S_IRUSR | S_IWUSR;
476 inode->i_links_count = 1;
477
478 journal_superblock_t *jsb = (journal_superblock_t *)journal_data;
479 jsb->s_header.h_magic = htonl(JBD2_MAGIC_NUMBER);
480 jsb->s_header.h_blocktype = htonl(JBD2_SUPERBLOCK_V2);
481 jsb->s_blocksize = htonl(info.block_size);
482 jsb->s_maxlen = htonl(info.journal_blocks);
483 jsb->s_nr_users = htonl(1);
484 jsb->s_first = htonl(1);
485 jsb->s_sequence = htonl(1);
486
487 memcpy(aux_info.sb->s_jnl_blocks, &inode->i_block, sizeof(inode->i_block));
488 }
489
490 /* Update the number of free blocks and inodes in the filesystem and in each
491 block group */
ext4_update_free()492 void ext4_update_free()
493 {
494 u32 i;
495
496 for (i = 0; i < aux_info.groups; i++) {
497 u32 bg_free_blocks = get_free_blocks(i);
498 u32 bg_free_inodes = get_free_inodes(i);
499 u16 crc;
500
501 aux_info.bg_desc[i].bg_free_blocks_count = bg_free_blocks;
502 aux_info.sb->s_free_blocks_count_lo += bg_free_blocks;
503
504 aux_info.bg_desc[i].bg_free_inodes_count = bg_free_inodes;
505 aux_info.sb->s_free_inodes_count += bg_free_inodes;
506
507 aux_info.bg_desc[i].bg_used_dirs_count += get_directories(i);
508
509 aux_info.bg_desc[i].bg_flags = get_bg_flags(i);
510
511 crc = ext4_crc16(~0, aux_info.sb->s_uuid, sizeof(aux_info.sb->s_uuid));
512 crc = ext4_crc16(crc, &i, sizeof(i));
513 crc = ext4_crc16(crc, &aux_info.bg_desc[i], offsetof(struct ext2_group_desc, bg_checksum));
514 aux_info.bg_desc[i].bg_checksum = crc;
515 }
516 }
517
get_block_device_size(int fd)518 u64 get_block_device_size(int fd)
519 {
520 u64 size = 0;
521 int ret;
522
523 #if defined(__linux__)
524 ret = ioctl(fd, BLKGETSIZE64, &size);
525 #elif defined(__APPLE__) && defined(__MACH__)
526 ret = ioctl(fd, DKIOCGETBLOCKCOUNT, &size);
527 #else
528 close(fd);
529 return 0;
530 #endif
531
532 if (ret)
533 return 0;
534
535 return size;
536 }
537
is_block_device_fd(int fd)538 int is_block_device_fd(int fd)
539 {
540 #ifdef USE_MINGW
541 return 0;
542 #else
543 struct stat st;
544 int ret = fstat(fd, &st);
545 if (ret < 0)
546 return 0;
547
548 return S_ISBLK(st.st_mode);
549 #endif
550 }
551
get_file_size(int fd)552 u64 get_file_size(int fd)
553 {
554 struct stat buf;
555 int ret;
556 u64 reserve_len = 0;
557 s64 computed_size;
558
559 ret = fstat(fd, &buf);
560 if (ret)
561 return 0;
562
563 if (info.len < 0)
564 reserve_len = -info.len;
565
566 if (S_ISREG(buf.st_mode))
567 computed_size = buf.st_size - reserve_len;
568 else if (S_ISBLK(buf.st_mode))
569 computed_size = get_block_device_size(fd) - reserve_len;
570 else
571 computed_size = 0;
572
573 if (computed_size < 0) {
574 warn("Computed filesystem size less than 0");
575 computed_size = 0;
576 }
577
578 return computed_size;
579 }
580
parse_num(const char * arg)581 u64 parse_num(const char *arg)
582 {
583 char *endptr;
584 u64 num = strtoull(arg, &endptr, 10);
585 if (*endptr == 'k' || *endptr == 'K')
586 num *= 1024LL;
587 else if (*endptr == 'm' || *endptr == 'M')
588 num *= 1024LL * 1024LL;
589 else if (*endptr == 'g' || *endptr == 'G')
590 num *= 1024LL * 1024LL * 1024LL;
591
592 return num;
593 }
594
read_ext(int fd,int verbose)595 int read_ext(int fd, int verbose)
596 {
597 off64_t ret;
598 struct ext4_super_block sb;
599
600 read_sb(fd, &sb);
601
602 ext4_parse_sb_info(&sb);
603
604 ret = lseek64(fd, info.len, SEEK_SET);
605 if (ret < 0)
606 critical_error_errno("failed to seek to end of input image");
607
608 ret = lseek64(fd, info.block_size * (aux_info.first_data_block + 1), SEEK_SET);
609 if (ret < 0)
610 critical_error_errno("failed to seek to block group descriptors");
611
612 ret = read(fd, aux_info.bg_desc, info.block_size * aux_info.bg_desc_blocks);
613 if (ret < 0)
614 critical_error_errno("failed to read block group descriptors");
615 if (ret != (int)info.block_size * (int)aux_info.bg_desc_blocks)
616 critical_error("failed to read all of block group descriptors");
617
618 if (verbose) {
619 printf("Found filesystem with parameters:\n");
620 printf(" Size: %"PRIu64"\n", info.len);
621 printf(" Block size: %d\n", info.block_size);
622 printf(" Blocks per group: %d\n", info.blocks_per_group);
623 printf(" Inodes per group: %d\n", info.inodes_per_group);
624 printf(" Inode size: %d\n", info.inode_size);
625 printf(" Label: %s\n", info.label);
626 printf(" Blocks: %"PRIu64"\n", aux_info.len_blocks);
627 printf(" Block groups: %d\n", aux_info.groups);
628 printf(" Reserved block group size: %d\n", info.bg_desc_reserve_blocks);
629 printf(" Used %d/%d inodes and %d/%d blocks\n",
630 aux_info.sb->s_inodes_count - aux_info.sb->s_free_inodes_count,
631 aux_info.sb->s_inodes_count,
632 aux_info.sb->s_blocks_count_lo - aux_info.sb->s_free_blocks_count_lo,
633 aux_info.sb->s_blocks_count_lo);
634 }
635
636 return 0;
637 }
638
639