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 "make_ext4fs.h"
18 #include "ext4_utils.h"
19 #include "allocate.h"
20 #include "contents.h"
21 #include "wipe.h"
22
23 #include <sparse/sparse.h>
24
25 #include <assert.h>
26 #include <dirent.h>
27 #include <fcntl.h>
28 #include <inttypes.h>
29 #include <libgen.h>
30 #include <stdio.h>
31 #include <stdlib.h>
32 #include <string.h>
33 #include <unistd.h>
34 #include <sys/stat.h>
35 #include <sys/types.h>
36
37 #ifdef USE_MINGW
38
39 #include <winsock2.h>
40
41 /* These match the Linux definitions of these flags.
42 L_xx is defined to avoid conflicting with the win32 versions.
43 */
44 #define L_S_IRUSR 00400
45 #define L_S_IWUSR 00200
46 #define L_S_IXUSR 00100
47 #define S_IRWXU (L_S_IRUSR | L_S_IWUSR | L_S_IXUSR)
48 #define S_IRGRP 00040
49 #define S_IWGRP 00020
50 #define S_IXGRP 00010
51 #define S_IRWXG (S_IRGRP | S_IWGRP | S_IXGRP)
52 #define S_IROTH 00004
53 #define S_IWOTH 00002
54 #define S_IXOTH 00001
55 #define S_IRWXO (S_IROTH | S_IWOTH | S_IXOTH)
56 #define S_ISUID 0004000
57 #define S_ISGID 0002000
58 #define S_ISVTX 0001000
59
60 #else
61
62 #include <selinux/selinux.h>
63 #include <selinux/label.h>
64
65 #define O_BINARY 0
66
67 #endif
68
69 /* TODO: Not implemented:
70 Allocating blocks in the same block group as the file inode
71 Hash or binary tree directories
72 Special files: sockets, devices, fifos
73 */
74
filter_dot(const struct dirent * d)75 static int filter_dot(const struct dirent *d)
76 {
77 return (strcmp(d->d_name, "..") && strcmp(d->d_name, "."));
78 }
79
build_default_directory_structure(const char * dir_path,struct selabel_handle * sehnd)80 static u32 build_default_directory_structure(const char *dir_path,
81 struct selabel_handle *sehnd)
82 {
83 u32 inode;
84 u32 root_inode;
85 struct dentry dentries = {
86 .filename = "lost+found",
87 .file_type = EXT4_FT_DIR,
88 .mode = S_IRWXU,
89 .uid = 0,
90 .gid = 0,
91 .mtime = 0,
92 };
93 root_inode = make_directory(0, 1, &dentries, 1);
94 inode = make_directory(root_inode, 0, NULL, 0);
95 *dentries.inode = inode;
96 inode_set_permissions(inode, dentries.mode,
97 dentries.uid, dentries.gid, dentries.mtime);
98
99 #ifndef USE_MINGW
100 if (sehnd) {
101 char *path = NULL;
102 char *secontext = NULL;
103
104 asprintf(&path, "%slost+found", dir_path);
105 if (selabel_lookup(sehnd, &secontext, path, S_IFDIR) < 0) {
106 error("cannot lookup security context for %s", path);
107 } else {
108 inode_set_selinux(inode, secontext);
109 freecon(secontext);
110 }
111 free(path);
112 }
113 #endif
114
115 return root_inode;
116 }
117
118 #ifndef USE_MINGW
119 /* Read a local directory and create the same tree in the generated filesystem.
120 Calls itself recursively with each directory in the given directory.
121 full_path is an absolute or relative path, with a trailing slash, to the
122 directory on disk that should be copied, or NULL if this is a directory
123 that does not exist on disk (e.g. lost+found).
124 dir_path is an absolute path, with trailing slash, to the same directory
125 if the image were mounted at the specified mount point */
build_directory_structure(const char * full_path,const char * dir_path,const char * target_out_path,u32 dir_inode,fs_config_func_t fs_config_func,struct selabel_handle * sehnd,int verbose,time_t fixed_time)126 static u32 build_directory_structure(const char *full_path, const char *dir_path, const char *target_out_path,
127 u32 dir_inode, fs_config_func_t fs_config_func,
128 struct selabel_handle *sehnd, int verbose, time_t fixed_time)
129 {
130 int entries = 0;
131 struct dentry *dentries;
132 struct dirent **namelist = NULL;
133 struct stat stat;
134 int ret;
135 int i;
136 u32 inode;
137 u32 entry_inode;
138 u32 dirs = 0;
139 bool needs_lost_and_found = false;
140
141 if (full_path) {
142 entries = scandir(full_path, &namelist, filter_dot, (void*)alphasort);
143 if (entries < 0) {
144 #ifdef __GLIBC__
145 /* The scandir function implemented in glibc has a bug that makes it
146 erroneously fail with ENOMEM under certain circumstances.
147 As a workaround we can retry the scandir call with the same arguments.
148 GLIBC BZ: https://sourceware.org/bugzilla/show_bug.cgi?id=17804 */
149 if (errno == ENOMEM)
150 entries = scandir(full_path, &namelist, filter_dot, (void*)alphasort);
151 #endif
152 if (entries < 0) {
153 error_errno("scandir");
154 return EXT4_ALLOCATE_FAILED;
155 }
156 }
157 }
158
159 if (dir_inode == 0) {
160 /* root directory, check if lost+found already exists */
161 for (i = 0; i < entries; i++)
162 if (strcmp(namelist[i]->d_name, "lost+found") == 0)
163 break;
164 if (i == entries)
165 needs_lost_and_found = true;
166 }
167
168 dentries = calloc(entries, sizeof(struct dentry));
169 if (dentries == NULL)
170 critical_error_errno("malloc");
171
172 for (i = 0; i < entries; i++) {
173 dentries[i].filename = strdup(namelist[i]->d_name);
174 if (dentries[i].filename == NULL)
175 critical_error_errno("strdup");
176
177 asprintf(&dentries[i].path, "%s%s", dir_path, namelist[i]->d_name);
178 asprintf(&dentries[i].full_path, "%s%s", full_path, namelist[i]->d_name);
179
180 free(namelist[i]);
181
182 ret = lstat(dentries[i].full_path, &stat);
183 if (ret < 0) {
184 error_errno("lstat");
185 i--;
186 entries--;
187 continue;
188 }
189
190 dentries[i].size = stat.st_size;
191 dentries[i].mode = stat.st_mode & (S_ISUID|S_ISGID|S_ISVTX|S_IRWXU|S_IRWXG|S_IRWXO);
192 if (fixed_time == -1) {
193 dentries[i].mtime = stat.st_mtime;
194 } else {
195 dentries[i].mtime = fixed_time;
196 }
197 uint64_t capabilities;
198 if (fs_config_func != NULL) {
199 #ifdef ANDROID
200 unsigned int mode = 0;
201 unsigned int uid = 0;
202 unsigned int gid = 0;
203 int dir = S_ISDIR(stat.st_mode);
204 fs_config_func(dentries[i].path, dir, target_out_path, &uid, &gid, &mode, &capabilities);
205 dentries[i].mode = mode;
206 dentries[i].uid = uid;
207 dentries[i].gid = gid;
208 dentries[i].capabilities = capabilities;
209 #else
210 error("can't set android permissions - built without android support");
211 #endif
212 }
213 #ifndef USE_MINGW
214 if (sehnd) {
215 if (selabel_lookup(sehnd, &dentries[i].secon, dentries[i].path, stat.st_mode) < 0) {
216 error("cannot lookup security context for %s", dentries[i].path);
217 }
218
219 if (dentries[i].secon && verbose)
220 printf("Labeling %s as %s\n", dentries[i].path, dentries[i].secon);
221 }
222 #endif
223
224 if (S_ISREG(stat.st_mode)) {
225 dentries[i].file_type = EXT4_FT_REG_FILE;
226 } else if (S_ISDIR(stat.st_mode)) {
227 dentries[i].file_type = EXT4_FT_DIR;
228 dirs++;
229 } else if (S_ISCHR(stat.st_mode)) {
230 dentries[i].file_type = EXT4_FT_CHRDEV;
231 } else if (S_ISBLK(stat.st_mode)) {
232 dentries[i].file_type = EXT4_FT_BLKDEV;
233 } else if (S_ISFIFO(stat.st_mode)) {
234 dentries[i].file_type = EXT4_FT_FIFO;
235 } else if (S_ISSOCK(stat.st_mode)) {
236 dentries[i].file_type = EXT4_FT_SOCK;
237 } else if (S_ISLNK(stat.st_mode)) {
238 dentries[i].file_type = EXT4_FT_SYMLINK;
239 dentries[i].link = calloc(info.block_size, 1);
240 readlink(dentries[i].full_path, dentries[i].link, info.block_size - 1);
241 } else {
242 error("unknown file type on %s", dentries[i].path);
243 i--;
244 entries--;
245 }
246 }
247 free(namelist);
248
249 if (needs_lost_and_found) {
250 /* insert a lost+found directory at the beginning of the dentries */
251 struct dentry *tmp = calloc(entries + 1, sizeof(struct dentry));
252 memset(tmp, 0, sizeof(struct dentry));
253 memcpy(tmp + 1, dentries, entries * sizeof(struct dentry));
254 dentries = tmp;
255
256 dentries[0].filename = strdup("lost+found");
257 asprintf(&dentries[0].path, "%slost+found", dir_path);
258 dentries[0].full_path = NULL;
259 dentries[0].size = 0;
260 dentries[0].mode = S_IRWXU;
261 dentries[0].file_type = EXT4_FT_DIR;
262 dentries[0].uid = 0;
263 dentries[0].gid = 0;
264 if (sehnd) {
265 if (selabel_lookup(sehnd, &dentries[0].secon, dentries[0].path, dentries[0].mode) < 0)
266 error("cannot lookup security context for %s", dentries[0].path);
267 }
268 entries++;
269 dirs++;
270 }
271
272 inode = make_directory(dir_inode, entries, dentries, dirs);
273
274 for (i = 0; i < entries; i++) {
275 if (dentries[i].file_type == EXT4_FT_REG_FILE) {
276 entry_inode = make_file(dentries[i].full_path, dentries[i].size);
277 } else if (dentries[i].file_type == EXT4_FT_DIR) {
278 char *subdir_full_path = NULL;
279 char *subdir_dir_path;
280 if (dentries[i].full_path) {
281 ret = asprintf(&subdir_full_path, "%s/", dentries[i].full_path);
282 if (ret < 0)
283 critical_error_errno("asprintf");
284 }
285 ret = asprintf(&subdir_dir_path, "%s/", dentries[i].path);
286 if (ret < 0)
287 critical_error_errno("asprintf");
288 entry_inode = build_directory_structure(subdir_full_path, subdir_dir_path, target_out_path,
289 inode, fs_config_func, sehnd, verbose, fixed_time);
290 free(subdir_full_path);
291 free(subdir_dir_path);
292 } else if (dentries[i].file_type == EXT4_FT_SYMLINK) {
293 entry_inode = make_link(dentries[i].link);
294 } else {
295 error("unknown file type on %s", dentries[i].path);
296 entry_inode = 0;
297 }
298 *dentries[i].inode = entry_inode;
299
300 ret = inode_set_permissions(entry_inode, dentries[i].mode,
301 dentries[i].uid, dentries[i].gid,
302 dentries[i].mtime);
303 if (ret)
304 error("failed to set permissions on %s\n", dentries[i].path);
305
306 /*
307 * It's important to call inode_set_selinux() before
308 * inode_set_capabilities(). Extended attributes need to
309 * be stored sorted order, and we guarantee this by making
310 * the calls in the proper order.
311 * Please see xattr_assert_sane() in contents.c
312 */
313 ret = inode_set_selinux(entry_inode, dentries[i].secon);
314 if (ret)
315 error("failed to set SELinux context on %s\n", dentries[i].path);
316 ret = inode_set_capabilities(entry_inode, dentries[i].capabilities);
317 if (ret)
318 error("failed to set capability on %s\n", dentries[i].path);
319
320 free(dentries[i].path);
321 free(dentries[i].full_path);
322 free(dentries[i].link);
323 free((void *)dentries[i].filename);
324 free(dentries[i].secon);
325 }
326
327 free(dentries);
328 return inode;
329 }
330 #endif
331
compute_block_size()332 static u32 compute_block_size()
333 {
334 return 4096;
335 }
336
compute_journal_blocks()337 static u32 compute_journal_blocks()
338 {
339 u32 journal_blocks = DIV_ROUND_UP(info.len, info.block_size) / 64;
340 if (journal_blocks < 1024)
341 journal_blocks = 1024;
342 if (journal_blocks > 32768)
343 journal_blocks = 32768;
344 return journal_blocks;
345 }
346
compute_blocks_per_group()347 static u32 compute_blocks_per_group()
348 {
349 return info.block_size * 8;
350 }
351
compute_inodes()352 static u32 compute_inodes()
353 {
354 return DIV_ROUND_UP(info.len, info.block_size) / 4;
355 }
356
compute_inodes_per_group()357 static u32 compute_inodes_per_group()
358 {
359 u32 blocks = DIV_ROUND_UP(info.len, info.block_size);
360 u32 block_groups = DIV_ROUND_UP(blocks, info.blocks_per_group);
361 u32 inodes = DIV_ROUND_UP(info.inodes, block_groups);
362 inodes = EXT4_ALIGN(inodes, (info.block_size / info.inode_size));
363
364 /* After properly rounding up the number of inodes/group,
365 * make sure to update the total inodes field in the info struct.
366 */
367 info.inodes = inodes * block_groups;
368
369 return inodes;
370 }
371
compute_bg_desc_reserve_blocks()372 static u32 compute_bg_desc_reserve_blocks()
373 {
374 u32 blocks = DIV_ROUND_UP(info.len, info.block_size);
375 u32 block_groups = DIV_ROUND_UP(blocks, info.blocks_per_group);
376 u32 bg_desc_blocks = DIV_ROUND_UP(block_groups * sizeof(struct ext2_group_desc),
377 info.block_size);
378
379 u32 bg_desc_reserve_blocks =
380 DIV_ROUND_UP(block_groups * 1024 * sizeof(struct ext2_group_desc),
381 info.block_size) - bg_desc_blocks;
382
383 if (bg_desc_reserve_blocks > info.block_size / sizeof(u32))
384 bg_desc_reserve_blocks = info.block_size / sizeof(u32);
385
386 return bg_desc_reserve_blocks;
387 }
388
reset_ext4fs_info()389 void reset_ext4fs_info() {
390 // Reset all the global data structures used by make_ext4fs so it
391 // can be called again.
392 memset(&info, 0, sizeof(info));
393 memset(&aux_info, 0, sizeof(aux_info));
394
395 if (ext4_sparse_file) {
396 sparse_file_destroy(ext4_sparse_file);
397 ext4_sparse_file = NULL;
398 }
399 }
400
make_ext4fs_sparse_fd(int fd,long long len,const char * mountpoint,struct selabel_handle * sehnd)401 int make_ext4fs_sparse_fd(int fd, long long len,
402 const char *mountpoint, struct selabel_handle *sehnd)
403 {
404 reset_ext4fs_info();
405 info.len = len;
406
407 return make_ext4fs_internal(fd, NULL, NULL, mountpoint, NULL, 0, 1, 0, 0, 0, sehnd, 0, -1, NULL);
408 }
409
make_ext4fs(const char * filename,long long len,const char * mountpoint,struct selabel_handle * sehnd)410 int make_ext4fs(const char *filename, long long len,
411 const char *mountpoint, struct selabel_handle *sehnd)
412 {
413 int fd;
414 int status;
415
416 reset_ext4fs_info();
417 info.len = len;
418
419 fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0644);
420 if (fd < 0) {
421 error_errno("open");
422 return EXIT_FAILURE;
423 }
424
425 status = make_ext4fs_internal(fd, NULL, NULL, mountpoint, NULL, 0, 0, 0, 1, 0, sehnd, 0, -1, NULL);
426 close(fd);
427
428 return status;
429 }
430
431 /* return a newly-malloc'd string that is a copy of str. The new string
432 is guaranteed to have a trailing slash. If absolute is true, the new string
433 is also guaranteed to have a leading slash.
434 */
canonicalize_slashes(const char * str,bool absolute)435 static char *canonicalize_slashes(const char *str, bool absolute)
436 {
437 char *ret;
438 int len = strlen(str);
439 int newlen = len;
440 char *ptr;
441
442 if (len == 0) {
443 if (absolute)
444 return strdup("/");
445 else
446 return strdup("");
447 }
448
449 if (str[0] != '/' && absolute) {
450 newlen++;
451 }
452 if (str[len - 1] != '/') {
453 newlen++;
454 }
455 ret = malloc(newlen + 1);
456 if (!ret) {
457 critical_error("malloc");
458 }
459
460 ptr = ret;
461 if (str[0] != '/' && absolute) {
462 *ptr++ = '/';
463 }
464
465 strcpy(ptr, str);
466 ptr += len;
467
468 if (str[len - 1] != '/') {
469 *ptr++ = '/';
470 }
471
472 if (ptr != ret + newlen) {
473 critical_error("assertion failed\n");
474 }
475
476 *ptr = '\0';
477
478 return ret;
479 }
480
canonicalize_abs_slashes(const char * str)481 static char *canonicalize_abs_slashes(const char *str)
482 {
483 return canonicalize_slashes(str, true);
484 }
485
canonicalize_rel_slashes(const char * str)486 static char *canonicalize_rel_slashes(const char *str)
487 {
488 return canonicalize_slashes(str, false);
489 }
490
make_ext4fs_internal(int fd,const char * _directory,const char * _target_out_directory,const char * _mountpoint,fs_config_func_t fs_config_func,int gzip,int sparse,int crc,int wipe,int real_uuid,struct selabel_handle * sehnd,int verbose,time_t fixed_time,FILE * block_list_file)491 int make_ext4fs_internal(int fd, const char *_directory, const char *_target_out_directory,
492 const char *_mountpoint, fs_config_func_t fs_config_func, int gzip,
493 int sparse, int crc, int wipe, int real_uuid,
494 struct selabel_handle *sehnd, int verbose, time_t fixed_time,
495 FILE* block_list_file)
496 {
497 u32 root_inode_num;
498 u16 root_mode;
499 char *mountpoint;
500 char *directory = NULL;
501 char *target_out_directory = NULL;
502
503 if (setjmp(setjmp_env))
504 return EXIT_FAILURE; /* Handle a call to longjmp() */
505
506 if (_mountpoint == NULL) {
507 mountpoint = strdup("");
508 } else {
509 mountpoint = canonicalize_abs_slashes(_mountpoint);
510 }
511
512 if (_directory) {
513 directory = canonicalize_rel_slashes(_directory);
514 }
515
516 if (_target_out_directory) {
517 target_out_directory = canonicalize_rel_slashes(_target_out_directory);
518 }
519
520 if (info.len <= 0)
521 info.len = get_file_size(fd);
522
523 if (info.len <= 0) {
524 fprintf(stderr, "Need size of filesystem\n");
525 return EXIT_FAILURE;
526 }
527
528 if (info.block_size <= 0)
529 info.block_size = compute_block_size();
530
531 /* Round down the filesystem length to be a multiple of the block size */
532 info.len &= ~((u64)info.block_size - 1);
533
534 if (info.journal_blocks == 0)
535 info.journal_blocks = compute_journal_blocks();
536
537 if (info.no_journal == 0)
538 info.feat_compat = EXT4_FEATURE_COMPAT_HAS_JOURNAL;
539 else
540 info.journal_blocks = 0;
541
542 if (info.blocks_per_group <= 0)
543 info.blocks_per_group = compute_blocks_per_group();
544
545 if (info.inodes <= 0)
546 info.inodes = compute_inodes();
547
548 if (info.inode_size <= 0)
549 info.inode_size = 256;
550
551 if (info.label == NULL)
552 info.label = "";
553
554 info.inodes_per_group = compute_inodes_per_group();
555
556 info.feat_compat |=
557 EXT4_FEATURE_COMPAT_RESIZE_INODE |
558 EXT4_FEATURE_COMPAT_EXT_ATTR;
559
560 info.feat_ro_compat |=
561 EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER |
562 EXT4_FEATURE_RO_COMPAT_LARGE_FILE |
563 EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
564
565 info.feat_incompat |=
566 EXT4_FEATURE_INCOMPAT_EXTENTS |
567 EXT4_FEATURE_INCOMPAT_FILETYPE;
568
569
570 info.bg_desc_reserve_blocks = compute_bg_desc_reserve_blocks();
571
572 printf("Creating filesystem with parameters:\n");
573 printf(" Size: %"PRIu64"\n", info.len);
574 printf(" Block size: %d\n", info.block_size);
575 printf(" Blocks per group: %d\n", info.blocks_per_group);
576 printf(" Inodes per group: %d\n", info.inodes_per_group);
577 printf(" Inode size: %d\n", info.inode_size);
578 printf(" Journal blocks: %d\n", info.journal_blocks);
579 printf(" Label: %s\n", info.label);
580
581 ext4_create_fs_aux_info();
582
583 printf(" Blocks: %"PRIu64"\n", aux_info.len_blocks);
584 printf(" Block groups: %d\n", aux_info.groups);
585 printf(" Reserved block group size: %d\n", info.bg_desc_reserve_blocks);
586
587 ext4_sparse_file = sparse_file_new(info.block_size, info.len);
588
589 block_allocator_init();
590
591 ext4_fill_in_sb(real_uuid);
592
593 if (reserve_inodes(0, 10) == EXT4_ALLOCATE_FAILED)
594 error("failed to reserve first 10 inodes");
595
596 if (info.feat_compat & EXT4_FEATURE_COMPAT_HAS_JOURNAL)
597 ext4_create_journal_inode();
598
599 if (info.feat_compat & EXT4_FEATURE_COMPAT_RESIZE_INODE)
600 ext4_create_resize_inode();
601
602 #ifdef USE_MINGW
603 // Windows needs only 'create an empty fs image' functionality
604 assert(!directory);
605 root_inode_num = build_default_directory_structure(mountpoint, sehnd);
606 #else
607 if (directory)
608 root_inode_num = build_directory_structure(directory, mountpoint, target_out_directory, 0,
609 fs_config_func, sehnd, verbose, fixed_time);
610 else
611 root_inode_num = build_default_directory_structure(mountpoint, sehnd);
612 #endif
613
614 root_mode = S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH;
615 inode_set_permissions(root_inode_num, root_mode, 0, 0, 0);
616
617 #ifndef USE_MINGW
618 if (sehnd) {
619 char *secontext = NULL;
620
621 if (selabel_lookup(sehnd, &secontext, mountpoint, S_IFDIR) < 0) {
622 error("cannot lookup security context for %s", mountpoint);
623 }
624 if (secontext) {
625 if (verbose) {
626 printf("Labeling %s as %s\n", mountpoint, secontext);
627 }
628 inode_set_selinux(root_inode_num, secontext);
629 }
630 freecon(secontext);
631 }
632 #endif
633
634 ext4_update_free();
635
636 ext4_queue_sb();
637
638 if (block_list_file) {
639 size_t dirlen = directory ? strlen(directory) : 0;
640 struct block_allocation* p = get_saved_allocation_chain();
641 while (p) {
642 if (directory && strncmp(p->filename, directory, dirlen) == 0) {
643 // substitute mountpoint for the leading directory in the filename, in the output file
644 fprintf(block_list_file, "%s%s", mountpoint, p->filename + dirlen);
645 } else {
646 fprintf(block_list_file, "%s", p->filename);
647 }
648 print_blocks(block_list_file, p);
649 struct block_allocation* pn = p->next;
650 free_alloc(p);
651 p = pn;
652 }
653 }
654
655 printf("Created filesystem with %d/%d inodes and %d/%d blocks\n",
656 aux_info.sb->s_inodes_count - aux_info.sb->s_free_inodes_count,
657 aux_info.sb->s_inodes_count,
658 aux_info.sb->s_blocks_count_lo - aux_info.sb->s_free_blocks_count_lo,
659 aux_info.sb->s_blocks_count_lo);
660
661 if (wipe && WIPE_IS_SUPPORTED) {
662 wipe_block_device(fd, info.len);
663 }
664
665 write_ext4_image(fd, gzip, sparse, crc);
666
667 sparse_file_destroy(ext4_sparse_file);
668 ext4_sparse_file = NULL;
669
670 free(mountpoint);
671 free(directory);
672
673 return 0;
674 }
675