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Commit | Line | Data |
---|---|---|
72ed1264 TT |
1 | /* |
2 | * e2image.c --- Program which writes an image file backing up | |
3 | * critical metadata for the filesystem. | |
4 | * | |
a3827953 | 5 | * Copyright 2000, 2001 by Theodore Ts'o. |
72ed1264 TT |
6 | * |
7 | * %Begin-Header% | |
8 | * This file may be redistributed under the terms of the GNU Public | |
9 | * License. | |
10 | * %End-Header% | |
11 | */ | |
12 | ||
6304baf2 TT |
13 | #define _LARGEFILE_SOURCE |
14 | #define _LARGEFILE64_SOURCE | |
15 | ||
72ed1264 TT |
16 | #include <fcntl.h> |
17 | #include <grp.h> | |
18 | #ifdef HAVE_GETOPT_H | |
19 | #include <getopt.h> | |
20 | #else | |
21 | extern char *optarg; | |
22 | extern int optind; | |
23 | #endif | |
24 | #include <pwd.h> | |
25 | #include <stdio.h> | |
f38cf3cb | 26 | #ifdef HAVE_STDLIB_H |
72ed1264 | 27 | #include <stdlib.h> |
f38cf3cb | 28 | #endif |
72ed1264 TT |
29 | #include <string.h> |
30 | #include <time.h> | |
31 | #include <unistd.h> | |
32 | #include <fcntl.h> | |
33 | #include <errno.h> | |
34 | #include <sys/stat.h> | |
35 | #include <sys/types.h> | |
bf0449b1 | 36 | #include <assert.h> |
72ed1264 | 37 | |
54c637d4 | 38 | #include "ext2fs/ext2_fs.h" |
72ed1264 TT |
39 | #include "ext2fs/ext2fs.h" |
40 | #include "et/com_err.h" | |
41 | #include "uuid/uuid.h" | |
42 | #include "e2p/e2p.h" | |
43 | #include "ext2fs/e2image.h" | |
bf0449b1 | 44 | #include "ext2fs/qcow2.h" |
72ed1264 TT |
45 | |
46 | #include "../version.h" | |
47 | #include "nls-enable.h" | |
48 | ||
bf0449b1 LC |
49 | #define QCOW_OFLAG_COPIED (1LL << 63) |
50 | ||
51 | ||
3e377db2 | 52 | const char * program_name = "e2image"; |
72ed1264 TT |
53 | char * device_name = NULL; |
54 | ||
bf0449b1 LC |
55 | static void lseek_error_and_exit(int errnum) |
56 | { | |
57 | perror("seek"); | |
58 | exit(1); | |
59 | } | |
60 | ||
61 | static blk64_t align_offset(blk64_t offset, int n) | |
62 | { | |
63 | return (offset + n - 1) & ~(n - 1); | |
64 | } | |
65 | ||
66 | static int get_bits_from_size(size_t size) | |
67 | { | |
68 | int res = 0; | |
69 | ||
70 | if (size == 0) | |
71 | return -1; | |
72 | ||
73 | while (size != 1) { | |
74 | /* Not a power of two */ | |
75 | if (size & 1) | |
76 | return -1; | |
77 | ||
78 | size >>= 1; | |
79 | res++; | |
80 | } | |
81 | return res; | |
82 | } | |
83 | ||
72ed1264 TT |
84 | static void usage(void) |
85 | { | |
bf0449b1 | 86 | fprintf(stderr, _("Usage: %s [-rsIQ] device image_file\n"), |
d851ed39 | 87 | program_name); |
72ed1264 TT |
88 | exit (1); |
89 | } | |
90 | ||
bf0449b1 | 91 | static void generic_write(int fd, void *buf, int blocksize, blk64_t block) |
72ed1264 | 92 | { |
bf0449b1 LC |
93 | int count, free_buf = 0; |
94 | errcode_t err; | |
72ed1264 | 95 | |
bf0449b1 LC |
96 | if (!blocksize) |
97 | return; | |
98 | ||
99 | if (!buf) { | |
100 | free_buf = 1; | |
101 | err = ext2fs_get_arrayzero(1, blocksize, &buf); | |
102 | if (err) { | |
103 | com_err(program_name, err, "while allocating buffer"); | |
104 | exit(1); | |
105 | } | |
095b459d TT |
106 | } |
107 | ||
bf0449b1 LC |
108 | count = write(fd, buf, blocksize); |
109 | if (count != blocksize) { | |
110 | if (count == -1) | |
111 | err = errno; | |
112 | else | |
113 | err = 0; | |
114 | ||
115 | if (block) | |
116 | com_err(program_name, err, "error writing block %llu", | |
117 | block); | |
118 | else | |
119 | com_err(program_name, err, "error in write()"); | |
120 | ||
72ed1264 TT |
121 | exit(1); |
122 | } | |
bf0449b1 LC |
123 | if (free_buf) |
124 | ext2fs_free_mem(&buf); | |
125 | } | |
efc6f628 | 126 | |
bf0449b1 LC |
127 | static void write_header(int fd, void *hdr, int hdr_size, int wrt_size) |
128 | { | |
129 | char *header_buf; | |
96367ad3 | 130 | int ret; |
efc6f628 | 131 | |
bf0449b1 LC |
132 | /* Sanity check */ |
133 | if (hdr_size > wrt_size) { | |
134 | fprintf(stderr, _("Error: header size is bigger than " | |
135 | "wrt_size\n")); | |
136 | } | |
137 | ||
138 | ret = ext2fs_get_mem(wrt_size, &header_buf); | |
139 | if (ret) { | |
140 | fputs(_("Couldn't allocate header buffer\n"), stderr); | |
72ed1264 TT |
141 | exit(1); |
142 | } | |
bf0449b1 LC |
143 | |
144 | if (ext2fs_llseek(fd, 0, SEEK_SET) < 0) { | |
145 | perror("ext2fs_llseek while writing header"); | |
72ed1264 TT |
146 | exit(1); |
147 | } | |
bf0449b1 LC |
148 | memset(header_buf, 0, wrt_size); |
149 | ||
150 | if (hdr) | |
151 | memcpy(header_buf, hdr, hdr_size); | |
152 | ||
153 | generic_write(fd, header_buf, wrt_size, 0); | |
154 | ||
155 | ext2fs_free_mem(&header_buf); | |
72ed1264 TT |
156 | } |
157 | ||
6304baf2 | 158 | static void write_image_file(ext2_filsys fs, int fd) |
72ed1264 | 159 | { |
6304baf2 TT |
160 | struct ext2_image_hdr hdr; |
161 | struct stat st; | |
162 | errcode_t retval; | |
72ed1264 | 163 | |
bf0449b1 | 164 | write_header(fd, NULL, fs->blocksize, fs->blocksize); |
72ed1264 | 165 | memset(&hdr, 0, sizeof(struct ext2_image_hdr)); |
6304baf2 | 166 | |
bf0449b1 | 167 | hdr.offset_super = ext2fs_llseek(fd, 0, SEEK_CUR); |
72ed1264 TT |
168 | retval = ext2fs_image_super_write(fs, fd, 0); |
169 | if (retval) { | |
170 | com_err(program_name, retval, _("while writing superblock")); | |
171 | exit(1); | |
172 | } | |
efc6f628 | 173 | |
bf0449b1 | 174 | hdr.offset_inode = ext2fs_llseek(fd, 0, SEEK_CUR); |
6304baf2 TT |
175 | retval = ext2fs_image_inode_write(fs, fd, |
176 | (fd != 1) ? IMAGER_FLAG_SPARSEWRITE : 0); | |
72ed1264 TT |
177 | if (retval) { |
178 | com_err(program_name, retval, _("while writing inode table")); | |
179 | exit(1); | |
180 | } | |
efc6f628 | 181 | |
bf0449b1 | 182 | hdr.offset_blockmap = ext2fs_llseek(fd, 0, SEEK_CUR); |
72ed1264 TT |
183 | retval = ext2fs_image_bitmap_write(fs, fd, 0); |
184 | if (retval) { | |
185 | com_err(program_name, retval, _("while writing block bitmap")); | |
186 | exit(1); | |
187 | } | |
188 | ||
bf0449b1 | 189 | hdr.offset_inodemap = ext2fs_llseek(fd, 0, SEEK_CUR); |
72ed1264 TT |
190 | retval = ext2fs_image_bitmap_write(fs, fd, IMAGER_FLAG_INODEMAP); |
191 | if (retval) { | |
192 | com_err(program_name, retval, _("while writing inode bitmap")); | |
193 | exit(1); | |
194 | } | |
c5423c5b TT |
195 | |
196 | hdr.magic_number = EXT2_ET_MAGIC_E2IMAGE; | |
197 | strcpy(hdr.magic_descriptor, "Ext2 Image 1.0"); | |
198 | gethostname(hdr.fs_hostname, sizeof(hdr.fs_hostname)); | |
df200fff | 199 | strncpy(hdr.fs_device_name, device_name, sizeof(hdr.fs_device_name)-1); |
095b459d TT |
200 | hdr.fs_device_name[sizeof(hdr.fs_device_name) - 1] = 0; |
201 | hdr.fs_blocksize = fs->blocksize; | |
efc6f628 | 202 | |
c5423c5b TT |
203 | if (stat(device_name, &st) == 0) |
204 | hdr.fs_device = st.st_rdev; | |
205 | ||
206 | if (fstat(fd, &st) == 0) { | |
207 | hdr.image_device = st.st_dev; | |
208 | hdr.image_inode = st.st_ino; | |
209 | } | |
210 | memcpy(hdr.fs_uuid, fs->super->s_uuid, sizeof(hdr.fs_uuid)); | |
211 | ||
212 | hdr.image_time = time(0); | |
bf0449b1 | 213 | write_header(fd, &hdr, fs->blocksize, fs->blocksize); |
6304baf2 TT |
214 | } |
215 | ||
216 | /* | |
217 | * These set of functions are used to write a RAW image file. | |
218 | */ | |
219 | ext2fs_block_bitmap meta_block_map; | |
d851ed39 | 220 | ext2fs_block_bitmap scramble_block_map; /* Directory blocks to be scrambled */ |
bf0449b1 | 221 | blk64_t meta_blocks_count; |
6304baf2 TT |
222 | |
223 | struct process_block_struct { | |
224 | ext2_ino_t ino; | |
d851ed39 | 225 | int is_dir; |
6304baf2 TT |
226 | }; |
227 | ||
228 | /* | |
229 | * These subroutines short circuits ext2fs_get_blocks and | |
230 | * ext2fs_check_directory; we use them since we already have the inode | |
231 | * structure, so there's no point in letting the ext2fs library read | |
232 | * the inode again. | |
233 | */ | |
234 | static ino_t stashed_ino = 0; | |
235 | static struct ext2_inode *stashed_inode; | |
236 | ||
efc6f628 | 237 | static errcode_t meta_get_blocks(ext2_filsys fs EXT2FS_ATTR((unused)), |
54434927 TT |
238 | ext2_ino_t ino, |
239 | blk_t *blocks) | |
6304baf2 TT |
240 | { |
241 | int i; | |
efc6f628 | 242 | |
6304baf2 TT |
243 | if ((ino != stashed_ino) || !stashed_inode) |
244 | return EXT2_ET_CALLBACK_NOTHANDLED; | |
245 | ||
246 | for (i=0; i < EXT2_N_BLOCKS; i++) | |
247 | blocks[i] = stashed_inode->i_block[i]; | |
248 | return 0; | |
249 | } | |
250 | ||
efc6f628 | 251 | static errcode_t meta_check_directory(ext2_filsys fs EXT2FS_ATTR((unused)), |
54434927 | 252 | ext2_ino_t ino) |
4ea7bd04 TT |
253 | { |
254 | if ((ino != stashed_ino) || !stashed_inode) | |
255 | return EXT2_ET_CALLBACK_NOTHANDLED; | |
256 | ||
257 | if (!LINUX_S_ISDIR(stashed_inode->i_mode)) | |
258 | return EXT2_ET_NO_DIRECTORY; | |
259 | return 0; | |
260 | } | |
261 | ||
efc6f628 | 262 | static errcode_t meta_read_inode(ext2_filsys fs EXT2FS_ATTR((unused)), |
54434927 | 263 | ext2_ino_t ino, |
6304baf2 TT |
264 | struct ext2_inode *inode) |
265 | { | |
266 | if ((ino != stashed_ino) || !stashed_inode) | |
267 | return EXT2_ET_CALLBACK_NOTHANDLED; | |
268 | *inode = *stashed_inode; | |
269 | return 0; | |
270 | } | |
271 | ||
4ea7bd04 TT |
272 | static void use_inode_shortcuts(ext2_filsys fs, int bool) |
273 | { | |
274 | if (bool) { | |
275 | fs->get_blocks = meta_get_blocks; | |
276 | fs->check_directory = meta_check_directory; | |
277 | fs->read_inode = meta_read_inode; | |
278 | stashed_ino = 0; | |
279 | } else { | |
280 | fs->get_blocks = 0; | |
281 | fs->check_directory = 0; | |
282 | fs->read_inode = 0; | |
283 | } | |
284 | } | |
285 | ||
efc6f628 | 286 | static int process_dir_block(ext2_filsys fs EXT2FS_ATTR((unused)), |
d991bc74 | 287 | blk64_t *block_nr, |
efc6f628 | 288 | e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)), |
d991bc74 | 289 | blk64_t ref_block EXT2FS_ATTR((unused)), |
efc6f628 | 290 | int ref_offset EXT2FS_ATTR((unused)), |
54434927 | 291 | void *priv_data EXT2FS_ATTR((unused))) |
6304baf2 | 292 | { |
d851ed39 TT |
293 | struct process_block_struct *p; |
294 | ||
295 | p = (struct process_block_struct *) priv_data; | |
296 | ||
3c041a51 | 297 | ext2fs_mark_block_bitmap2(meta_block_map, *block_nr); |
bf0449b1 | 298 | meta_blocks_count++; |
efc6f628 | 299 | if (scramble_block_map && p->is_dir && blockcnt >= 0) |
3c041a51 | 300 | ext2fs_mark_block_bitmap2(scramble_block_map, *block_nr); |
6304baf2 TT |
301 | return 0; |
302 | } | |
303 | ||
efc6f628 | 304 | static int process_file_block(ext2_filsys fs EXT2FS_ATTR((unused)), |
d991bc74 | 305 | blk64_t *block_nr, |
efc6f628 | 306 | e2_blkcnt_t blockcnt, |
d991bc74 | 307 | blk64_t ref_block EXT2FS_ATTR((unused)), |
efc6f628 | 308 | int ref_offset EXT2FS_ATTR((unused)), |
54434927 | 309 | void *priv_data EXT2FS_ATTR((unused))) |
6304baf2 TT |
310 | { |
311 | if (blockcnt < 0) { | |
3c041a51 | 312 | ext2fs_mark_block_bitmap2(meta_block_map, *block_nr); |
bf0449b1 | 313 | meta_blocks_count++; |
6304baf2 TT |
314 | } |
315 | return 0; | |
316 | } | |
317 | ||
318 | static void mark_table_blocks(ext2_filsys fs) | |
319 | { | |
d991bc74 | 320 | blk64_t first_block, b; |
54434927 | 321 | unsigned int i,j; |
efc6f628 | 322 | |
bb1a46a4 | 323 | first_block = fs->super->s_first_data_block; |
6304baf2 TT |
324 | /* |
325 | * Mark primary superblock | |
326 | */ | |
3c041a51 | 327 | ext2fs_mark_block_bitmap2(meta_block_map, first_block); |
bf0449b1 | 328 | meta_blocks_count++; |
efc6f628 | 329 | |
6304baf2 TT |
330 | /* |
331 | * Mark the primary superblock descriptors | |
332 | */ | |
333 | for (j = 0; j < fs->desc_blocks; j++) { | |
3c041a51 | 334 | ext2fs_mark_block_bitmap2(meta_block_map, |
d991bc74 | 335 | ext2fs_descriptor_block_loc2(fs, first_block, j)); |
6304baf2 | 336 | } |
bf0449b1 | 337 | meta_blocks_count += fs->desc_blocks; |
6304baf2 TT |
338 | |
339 | for (i = 0; i < fs->group_desc_count; i++) { | |
340 | /* | |
341 | * Mark the blocks used for the inode table | |
342 | */ | |
d7cca6b0 VAH |
343 | if (ext2fs_inode_table_loc(fs, i)) { |
344 | for (j = 0, b = ext2fs_inode_table_loc(fs, i); | |
54434927 | 345 | j < (unsigned) fs->inode_blocks_per_group; |
6304baf2 | 346 | j++, b++) |
3c041a51 | 347 | ext2fs_mark_block_bitmap2(meta_block_map, b); |
bf0449b1 | 348 | meta_blocks_count += fs->inode_blocks_per_group; |
6304baf2 | 349 | } |
efc6f628 | 350 | |
6304baf2 | 351 | /* |
efc6f628 | 352 | * Mark block used for the block bitmap |
6304baf2 | 353 | */ |
d7cca6b0 | 354 | if (ext2fs_block_bitmap_loc(fs, i)) { |
3c041a51 | 355 | ext2fs_mark_block_bitmap2(meta_block_map, |
d7cca6b0 | 356 | ext2fs_block_bitmap_loc(fs, i)); |
bf0449b1 | 357 | meta_blocks_count++; |
6304baf2 | 358 | } |
efc6f628 | 359 | |
6304baf2 | 360 | /* |
efc6f628 | 361 | * Mark block used for the inode bitmap |
6304baf2 | 362 | */ |
d7cca6b0 | 363 | if (ext2fs_inode_bitmap_loc(fs, i)) { |
3c041a51 | 364 | ext2fs_mark_block_bitmap2(meta_block_map, |
d7cca6b0 | 365 | ext2fs_inode_bitmap_loc(fs, i)); |
bf0449b1 | 366 | meta_blocks_count++; |
6304baf2 | 367 | } |
6304baf2 TT |
368 | } |
369 | } | |
370 | ||
371 | /* | |
372 | * This function returns 1 if the specified block is all zeros | |
373 | */ | |
374 | static int check_zero_block(char *buf, int blocksize) | |
375 | { | |
376 | char *cp = buf; | |
377 | int left = blocksize; | |
378 | ||
379 | while (left > 0) { | |
380 | if (*cp++) | |
381 | return 0; | |
382 | left--; | |
383 | } | |
384 | return 1; | |
385 | } | |
386 | ||
e3ef3502 | 387 | static void write_block(int fd, char *buf, int sparse_offset, |
d991bc74 | 388 | int blocksize, blk64_t block) |
6304baf2 | 389 | { |
bf0449b1 | 390 | ext2_loff_t ret = 0; |
6304baf2 | 391 | |
bf0449b1 LC |
392 | if (sparse_offset) |
393 | ret = ext2fs_llseek(fd, sparse_offset, SEEK_CUR); | |
394 | ||
395 | if (ret < 0) | |
396 | lseek_error_and_exit(errno); | |
397 | generic_write(fd, buf, blocksize, block); | |
6304baf2 TT |
398 | } |
399 | ||
d851ed39 TT |
400 | int name_id[256]; |
401 | ||
8a480350 TT |
402 | #define EXT4_MAX_REC_LEN ((1<<16)-1) |
403 | ||
d991bc74 | 404 | static void scramble_dir_block(ext2_filsys fs, blk64_t blk, char *buf) |
d851ed39 TT |
405 | { |
406 | char *p, *end, *cp; | |
407 | struct ext2_dir_entry_2 *dirent; | |
8a480350 TT |
408 | unsigned int rec_len; |
409 | int id, len; | |
d851ed39 | 410 | |
d851ed39 TT |
411 | end = buf + fs->blocksize; |
412 | for (p = buf; p < end-8; p += rec_len) { | |
413 | dirent = (struct ext2_dir_entry_2 *) p; | |
414 | rec_len = dirent->rec_len; | |
2eae0930 TT |
415 | #ifdef WORDS_BIGENDIAN |
416 | rec_len = ext2fs_swab16(rec_len); | |
d851ed39 | 417 | #endif |
8a480350 TT |
418 | if (rec_len == EXT4_MAX_REC_LEN || rec_len == 0) |
419 | rec_len = fs->blocksize; | |
420 | else | |
421 | rec_len = (rec_len & 65532) | ((rec_len & 3) << 16); | |
d851ed39 TT |
422 | #if 0 |
423 | printf("rec_len = %d, name_len = %d\n", rec_len, dirent->name_len); | |
424 | #endif | |
425 | if (rec_len < 8 || (rec_len % 4) || | |
426 | (p+rec_len > end)) { | |
427 | printf("Corrupt directory block %lu: " | |
efc6f628 | 428 | "bad rec_len (%d)\n", (unsigned long) blk, |
9b9a780f | 429 | rec_len); |
d851ed39 | 430 | rec_len = end - p; |
8a480350 TT |
431 | (void) ext2fs_set_rec_len(fs, rec_len, |
432 | (struct ext2_dir_entry *) dirent); | |
2eae0930 | 433 | #ifdef WORDS_BIGENDIAN |
8a480350 | 434 | dirent->rec_len = ext2fs_swab16(dirent->rec_len); |
d851ed39 TT |
435 | #endif |
436 | continue; | |
437 | } | |
438 | if (dirent->name_len + 8 > rec_len) { | |
439 | printf("Corrupt directory block %lu: " | |
efc6f628 | 440 | "bad name_len (%d)\n", (unsigned long) blk, |
9b9a780f | 441 | dirent->name_len); |
d851ed39 TT |
442 | dirent->name_len = rec_len - 8; |
443 | continue; | |
444 | } | |
d851ed39 | 445 | cp = p+8; |
d851ed39 TT |
446 | len = rec_len - dirent->name_len - 8; |
447 | if (len > 0) | |
448 | memset(cp+dirent->name_len, 0, len); | |
79fc2a99 TT |
449 | if (dirent->name_len==1 && cp[0] == '.') |
450 | continue; | |
451 | if (dirent->name_len==2 && cp[0] == '.' && cp[1] == '.') | |
452 | continue; | |
453 | ||
454 | memset(cp, 'A', dirent->name_len); | |
d851ed39 TT |
455 | len = dirent->name_len; |
456 | id = name_id[len]++; | |
457 | while ((len > 0) && (id > 0)) { | |
458 | *cp += id % 26; | |
459 | id = id / 26; | |
460 | cp++; | |
461 | len--; | |
462 | } | |
463 | } | |
464 | } | |
465 | ||
4ea7bd04 | 466 | static void output_meta_data_blocks(ext2_filsys fs, int fd) |
6304baf2 TT |
467 | { |
468 | errcode_t retval; | |
d991bc74 | 469 | blk64_t blk; |
d851ed39 | 470 | char *buf, *zero_buf; |
e3ef3502 | 471 | int sparse = 0; |
6304baf2 | 472 | |
bf0449b1 LC |
473 | retval = ext2fs_get_mem(fs->blocksize, &buf); |
474 | if (retval) { | |
475 | com_err(program_name, retval, "while allocating buffer"); | |
d851ed39 TT |
476 | exit(1); |
477 | } | |
bf0449b1 LC |
478 | retval = ext2fs_get_memzero(fs->blocksize, &zero_buf); |
479 | if (retval) { | |
480 | com_err(program_name, retval, "while allocating buffer"); | |
d851ed39 TT |
481 | exit(1); |
482 | } | |
4efbac6f | 483 | for (blk = 0; blk < ext2fs_blocks_count(fs->super); blk++) { |
6304baf2 | 484 | if ((blk >= fs->super->s_first_data_block) && |
3c041a51 | 485 | ext2fs_test_block_bitmap2(meta_block_map, blk)) { |
24a117ab | 486 | retval = io_channel_read_blk64(fs->io, blk, 1, buf); |
6304baf2 TT |
487 | if (retval) { |
488 | com_err(program_name, retval, | |
d991bc74 | 489 | "error reading block %llu", blk); |
6304baf2 | 490 | } |
efc6f628 | 491 | if (scramble_block_map && |
3c041a51 | 492 | ext2fs_test_block_bitmap2(scramble_block_map, blk)) |
d851ed39 | 493 | scramble_dir_block(fs, blk, buf); |
6304baf2 TT |
494 | if ((fd != 1) && check_zero_block(buf, fs->blocksize)) |
495 | goto sparse_write; | |
e3ef3502 TT |
496 | write_block(fd, buf, sparse, fs->blocksize, blk); |
497 | sparse = 0; | |
6304baf2 TT |
498 | } else { |
499 | sparse_write: | |
500 | if (fd == 1) { | |
e3ef3502 TT |
501 | write_block(fd, zero_buf, 0, |
502 | fs->blocksize, blk); | |
6304baf2 TT |
503 | continue; |
504 | } | |
e3ef3502 TT |
505 | sparse += fs->blocksize; |
506 | if (sparse >= 1024*1024) { | |
bf0449b1 | 507 | |
e3ef3502 TT |
508 | write_block(fd, 0, sparse, 0, 0); |
509 | sparse = 0; | |
510 | } | |
6304baf2 TT |
511 | } |
512 | } | |
20abd3ea AT |
513 | if (sparse) |
514 | write_block(fd, zero_buf, sparse-1, 1, -1); | |
bf0449b1 LC |
515 | ext2fs_free_mem(&zero_buf); |
516 | ext2fs_free_mem(&buf); | |
6304baf2 TT |
517 | } |
518 | ||
bf0449b1 LC |
519 | static void init_l1_table(struct ext2_super_block *sb, |
520 | struct ext2_qcow2_image *image) | |
521 | { | |
522 | __u64 *l1_table; | |
523 | errcode_t ret; | |
524 | ||
525 | ret = ext2fs_get_arrayzero(image->l1_size, sizeof(__u64), &l1_table); | |
526 | if (ret) { | |
527 | com_err(program_name, ret, "while allocating l1 table"); | |
528 | exit(1); | |
529 | } | |
530 | ||
531 | image->l1_table = l1_table; | |
532 | } | |
533 | ||
534 | static void init_l2_cache(struct ext2_qcow2_image *image) | |
535 | { | |
536 | unsigned int count, i; | |
537 | struct ext2_qcow2_l2_cache *cache; | |
538 | struct ext2_qcow2_l2_table *table; | |
539 | errcode_t ret; | |
540 | ||
541 | ret = ext2fs_get_arrayzero(1, sizeof(struct ext2_qcow2_l2_cache), | |
542 | &cache); | |
543 | if (ret) | |
544 | goto alloc_err; | |
545 | ||
546 | count = (image->l1_size > L2_CACHE_PREALLOC) ? L2_CACHE_PREALLOC : | |
547 | image->l1_size; | |
548 | ||
549 | cache->count = count; | |
550 | cache->free = count; | |
551 | cache->next_offset = image->l2_offset; | |
552 | ||
553 | for (i = 0; i < count; i++) { | |
554 | ret = ext2fs_get_arrayzero(1, | |
555 | sizeof(struct ext2_qcow2_l2_table), &table); | |
556 | if (ret) | |
557 | goto alloc_err; | |
558 | ||
559 | ret = ext2fs_get_arrayzero(image->l2_size, | |
560 | sizeof(__u64), &table->data); | |
561 | if (ret) | |
562 | goto alloc_err; | |
563 | ||
564 | table->next = cache->free_head; | |
565 | cache->free_head = table; | |
566 | } | |
567 | ||
568 | image->l2_cache = cache; | |
569 | return; | |
570 | ||
571 | alloc_err: | |
572 | com_err(program_name, ret, "while allocating l2 cache"); | |
573 | exit(1); | |
574 | } | |
575 | ||
576 | static void put_l2_cache(struct ext2_qcow2_image *image) | |
577 | { | |
578 | struct ext2_qcow2_l2_cache *cache = image->l2_cache; | |
579 | struct ext2_qcow2_l2_table *tmp, *table; | |
580 | ||
581 | if (!cache) | |
582 | return; | |
583 | ||
584 | table = cache->free_head; | |
585 | cache->free_head = NULL; | |
586 | again: | |
587 | while (table) { | |
588 | tmp = table; | |
589 | table = table->next; | |
590 | ext2fs_free_mem(&tmp->data); | |
591 | ext2fs_free_mem(&tmp); | |
592 | } | |
593 | ||
594 | if (cache->free != cache->count) { | |
595 | fprintf(stderr, "Warning: There are still tables in the " | |
596 | "cache while putting the cache, data will " | |
597 | "be lost so the image may not be valid.\n"); | |
598 | table = cache->used_head; | |
599 | cache->used_head = NULL; | |
600 | goto again; | |
601 | } | |
602 | ||
603 | ext2fs_free_mem(&cache); | |
604 | } | |
605 | ||
606 | static int init_refcount(struct ext2_qcow2_image *img, blk64_t table_offset) | |
607 | { | |
608 | struct ext2_qcow2_refcount *ref; | |
609 | blk64_t table_clusters; | |
610 | errcode_t ret; | |
611 | ||
612 | ref = &(img->refcount); | |
613 | ||
614 | /* | |
615 | * One refcount block addresses 2048 clusters, one refcount table | |
616 | * addresses cluster/sizeof(__u64) refcount blocks, and we need | |
617 | * to address meta_blocks_count clusters + qcow2 metadata clusters | |
618 | * in the worst case. | |
619 | */ | |
620 | table_clusters = meta_blocks_count + (table_offset >> | |
621 | img->cluster_bits); | |
622 | table_clusters >>= (img->cluster_bits + 6 - 1); | |
623 | table_clusters = (table_clusters == 0) ? 1 : table_clusters; | |
624 | ||
625 | ref->refcount_table_offset = table_offset; | |
626 | ref->refcount_table_clusters = table_clusters; | |
627 | ref->refcount_table_index = 0; | |
628 | ref->refcount_block_index = 0; | |
629 | ||
630 | /* Allocate refcount table */ | |
631 | ret = ext2fs_get_arrayzero(ref->refcount_table_clusters, | |
632 | img->cluster_size, &ref->refcount_table); | |
633 | if (ret) | |
634 | return ret; | |
635 | ||
636 | /* Allocate refcount block */ | |
637 | ret = ext2fs_get_arrayzero(1, img->cluster_size, &ref->refcount_block); | |
638 | if (ret) | |
639 | ext2fs_free_mem(&ref->refcount_table); | |
640 | ||
641 | return ret; | |
642 | } | |
643 | ||
644 | static int initialize_qcow2_image(int fd, ext2_filsys fs, | |
645 | struct ext2_qcow2_image *image) | |
646 | { | |
647 | struct ext2_qcow2_hdr *header; | |
648 | blk64_t total_size, offset; | |
649 | int shift, l2_bits, header_size, l1_size, ret; | |
650 | int cluster_bits = get_bits_from_size(fs->blocksize); | |
651 | struct ext2_super_block *sb = fs->super; | |
652 | ||
653 | /* Allocate header */ | |
654 | ret = ext2fs_get_memzero(sizeof(struct ext2_qcow2_hdr), &header); | |
655 | if (ret) | |
656 | return ret; | |
657 | ||
658 | total_size = ext2fs_blocks_count(sb) << cluster_bits; | |
659 | image->cluster_size = fs->blocksize; | |
660 | image->l2_size = 1 << (cluster_bits - 3); | |
661 | image->cluster_bits = cluster_bits; | |
662 | image->fd = fd; | |
663 | ||
664 | header->magic = ext2fs_cpu_to_be32(QCOW_MAGIC); | |
665 | header->version = ext2fs_cpu_to_be32(QCOW_VERSION); | |
666 | header->size = ext2fs_cpu_to_be64(total_size); | |
667 | header->cluster_bits = ext2fs_cpu_to_be32(cluster_bits); | |
668 | ||
669 | header_size = (sizeof(struct ext2_qcow2_hdr) + 7) & ~7; | |
670 | offset = align_offset(header_size, image->cluster_size); | |
671 | ||
672 | header->l1_table_offset = ext2fs_cpu_to_be64(offset); | |
673 | image->l1_offset = offset; | |
674 | ||
675 | l2_bits = cluster_bits - 3; | |
676 | shift = cluster_bits + l2_bits; | |
677 | l1_size = ((total_size + (1LL << shift) - 1) >> shift); | |
678 | header->l1_size = ext2fs_cpu_to_be32(l1_size); | |
679 | image->l1_size = l1_size; | |
680 | ||
681 | /* Make space for L1 table */ | |
682 | offset += align_offset(l1_size * sizeof(blk64_t), image->cluster_size); | |
683 | ||
684 | /* Initialize refcounting */ | |
685 | ret = init_refcount(image, offset); | |
686 | if (ret) { | |
687 | ext2fs_free_mem(&header); | |
688 | return ret; | |
689 | } | |
690 | header->refcount_table_offset = ext2fs_cpu_to_be64(offset); | |
691 | header->refcount_table_clusters = | |
692 | ext2fs_cpu_to_be32(image->refcount.refcount_table_clusters); | |
693 | offset += image->cluster_size; | |
694 | offset += image->refcount.refcount_table_clusters << | |
695 | image->cluster_bits; | |
696 | ||
697 | /* Make space for L2 tables */ | |
698 | image->l2_offset = offset; | |
699 | offset += image->cluster_size; | |
700 | ||
701 | /* Make space for first refcount block */ | |
702 | image->refcount.refcount_block_offset = offset; | |
703 | ||
704 | image->hdr = header; | |
705 | /* Initialize l1 and l2 tables */ | |
706 | init_l1_table(sb, image); | |
707 | init_l2_cache(image); | |
708 | ||
709 | return 0; | |
710 | } | |
711 | ||
712 | static void free_qcow2_image(struct ext2_qcow2_image *img) | |
713 | { | |
bf0449b1 LC |
714 | if (!img) |
715 | return; | |
716 | ||
717 | if (img->hdr) | |
718 | ext2fs_free_mem(&img->hdr); | |
719 | ||
720 | if (img->l1_table) | |
721 | ext2fs_free_mem(&img->l1_table); | |
722 | ||
723 | if (img->refcount.refcount_table) | |
724 | ext2fs_free_mem(&img->refcount.refcount_table); | |
725 | if (img->refcount.refcount_block) | |
726 | ext2fs_free_mem(&img->refcount.refcount_block); | |
727 | ||
728 | put_l2_cache(img); | |
729 | ||
730 | ext2fs_free_mem(&img); | |
731 | } | |
732 | ||
733 | /** | |
734 | * Put table from used list (used_head) into free list (free_head). | |
735 | * l2_table is used to return pointer to the next used table (used_head). | |
736 | */ | |
737 | static void put_used_table(struct ext2_qcow2_image *img, | |
738 | struct ext2_qcow2_l2_table **l2_table) | |
739 | { | |
740 | struct ext2_qcow2_l2_cache *cache = img->l2_cache; | |
741 | struct ext2_qcow2_l2_table *table; | |
742 | ||
743 | table = cache->used_head; | |
744 | cache->used_head = table->next; | |
745 | ||
746 | assert(table); | |
747 | if (!table->next) | |
748 | cache->used_tail = NULL; | |
749 | ||
750 | /* Clean the table for case we will need to use it again */ | |
751 | memset(table->data, 0, img->cluster_size); | |
752 | table->next = cache->free_head; | |
753 | cache->free_head = table; | |
754 | ||
755 | cache->free++; | |
756 | ||
757 | *l2_table = cache->used_head; | |
758 | } | |
759 | ||
760 | static void flush_l2_cache(struct ext2_qcow2_image *image) | |
761 | { | |
9d10f017 LC |
762 | blk64_t seek = 0; |
763 | ext2_loff_t offset; | |
bf0449b1 LC |
764 | struct ext2_qcow2_l2_cache *cache = image->l2_cache; |
765 | struct ext2_qcow2_l2_table *table = cache->used_head; | |
766 | int fd = image->fd; | |
767 | ||
768 | /* Store current position */ | |
769 | if ((offset = ext2fs_llseek(fd, 0, SEEK_CUR)) < 0) | |
770 | lseek_error_and_exit(errno); | |
771 | ||
772 | assert(table); | |
773 | while (cache->free < cache->count) { | |
774 | if (seek != table->offset) { | |
775 | if (ext2fs_llseek(fd, table->offset, SEEK_SET) < 0) | |
776 | lseek_error_and_exit(errno); | |
777 | seek = table->offset; | |
778 | } | |
779 | ||
780 | generic_write(fd, (char *)table->data, image->cluster_size , 0); | |
781 | put_used_table(image, &table); | |
782 | seek += image->cluster_size; | |
783 | } | |
784 | ||
785 | /* Restore previous position */ | |
786 | if (ext2fs_llseek(fd, offset, SEEK_SET) < 0) | |
787 | lseek_error_and_exit(errno); | |
788 | } | |
789 | ||
790 | /** | |
791 | * Get first free table (from free_head) and put it into tail of used list | |
792 | * (to used_tail). | |
793 | * l2_table is used to return pointer to moved table. | |
794 | * Returns 1 if the cache is full, 0 otherwise. | |
795 | */ | |
796 | static void get_free_table(struct ext2_qcow2_image *image, | |
797 | struct ext2_qcow2_l2_table **l2_table) | |
798 | { | |
799 | struct ext2_qcow2_l2_table *table; | |
800 | struct ext2_qcow2_l2_cache *cache = image->l2_cache; | |
801 | ||
802 | if (0 == cache->free) | |
803 | flush_l2_cache(image); | |
804 | ||
805 | table = cache->free_head; | |
806 | assert(table); | |
807 | cache->free_head = table->next; | |
808 | ||
809 | if (cache->used_tail) | |
810 | cache->used_tail->next = table; | |
811 | else | |
812 | /* First item in the used list */ | |
813 | cache->used_head = table; | |
814 | ||
815 | cache->used_tail = table; | |
816 | cache->free--; | |
817 | ||
818 | *l2_table = table; | |
819 | } | |
820 | ||
821 | static int add_l2_item(struct ext2_qcow2_image *img, blk64_t blk, | |
822 | blk64_t data, blk64_t next) | |
823 | { | |
824 | struct ext2_qcow2_l2_cache *cache = img->l2_cache; | |
825 | struct ext2_qcow2_l2_table *table = cache->used_tail; | |
826 | blk64_t l1_index = blk / img->l2_size; | |
827 | blk64_t l2_index = blk & (img->l2_size - 1); | |
828 | int ret = 0; | |
829 | ||
830 | /* | |
831 | * Need to create new table if it does not exist, | |
832 | * or if it is full | |
833 | */ | |
834 | if (!table || (table->l1_index != l1_index)) { | |
835 | get_free_table(img, &table); | |
836 | table->l1_index = l1_index; | |
837 | table->offset = cache->next_offset; | |
838 | cache->next_offset = next; | |
839 | img->l1_table[l1_index] = | |
840 | ext2fs_cpu_to_be64(table->offset | QCOW_OFLAG_COPIED); | |
841 | ret++; | |
842 | } | |
843 | ||
844 | table->data[l2_index] = ext2fs_cpu_to_be64(data | QCOW_OFLAG_COPIED); | |
845 | return ret; | |
846 | } | |
847 | ||
848 | static int update_refcount(int fd, struct ext2_qcow2_image *img, | |
849 | blk64_t offset, blk64_t rfblk_pos) | |
850 | { | |
851 | struct ext2_qcow2_refcount *ref; | |
852 | __u32 table_index; | |
853 | int ret = 0; | |
854 | ||
855 | ref = &(img->refcount); | |
856 | table_index = offset >> (2 * img->cluster_bits - 1); | |
857 | ||
858 | /* | |
859 | * Need to create new refcount block when the offset addresses | |
860 | * another item in the refcount table | |
861 | */ | |
862 | if (table_index != ref->refcount_table_index) { | |
863 | ||
864 | if (ext2fs_llseek(fd, ref->refcount_block_offset, SEEK_SET) < 0) | |
865 | lseek_error_and_exit(errno); | |
866 | ||
867 | generic_write(fd, (char *)ref->refcount_block, | |
868 | img->cluster_size, 0); | |
869 | memset(ref->refcount_block, 0, img->cluster_size); | |
870 | ||
871 | ref->refcount_table[ref->refcount_table_index] = | |
872 | ext2fs_cpu_to_be64(ref->refcount_block_offset); | |
873 | ref->refcount_block_offset = rfblk_pos; | |
874 | ref->refcount_block_index = 0; | |
875 | ref->refcount_table_index = table_index; | |
876 | ret++; | |
877 | } | |
878 | ||
879 | /* | |
880 | * We are relying on the fact that we are creating the qcow2 | |
881 | * image sequentially, hence we will always allocate refcount | |
882 | * block items sequentialy. | |
883 | */ | |
884 | ref->refcount_block[ref->refcount_block_index] = ext2fs_cpu_to_be16(1); | |
885 | ref->refcount_block_index++; | |
886 | return ret; | |
887 | } | |
888 | ||
889 | static int sync_refcount(int fd, struct ext2_qcow2_image *img) | |
890 | { | |
891 | struct ext2_qcow2_refcount *ref; | |
892 | ||
893 | ref = &(img->refcount); | |
894 | ||
895 | ref->refcount_table[ref->refcount_table_index] = | |
896 | ext2fs_cpu_to_be64(ref->refcount_block_offset); | |
897 | if (ext2fs_llseek(fd, ref->refcount_table_offset, SEEK_SET) < 0) | |
898 | lseek_error_and_exit(errno); | |
899 | generic_write(fd, (char *)ref->refcount_table, | |
900 | ref->refcount_table_clusters << img->cluster_bits, 0); | |
901 | ||
902 | if (ext2fs_llseek(fd, ref->refcount_block_offset, SEEK_SET) < 0) | |
903 | lseek_error_and_exit(errno); | |
904 | generic_write(fd, (char *)ref->refcount_block, img->cluster_size, 0); | |
905 | return 0; | |
906 | } | |
907 | ||
908 | static void output_qcow2_meta_data_blocks(ext2_filsys fs, int fd) | |
909 | { | |
910 | errcode_t retval; | |
96367ad3 | 911 | blk64_t blk, offset, size, end; |
bf0449b1 | 912 | char *buf; |
bf0449b1 | 913 | struct ext2_qcow2_image *img; |
96367ad3 | 914 | unsigned int header_size; |
bf0449b1 LC |
915 | |
916 | /* allocate struct ext2_qcow2_image */ | |
917 | retval = ext2fs_get_mem(sizeof(struct ext2_qcow2_image), &img); | |
918 | if (retval) { | |
919 | com_err(program_name, retval, | |
920 | "while allocating ext2_qcow2_image"); | |
921 | exit(1); | |
922 | } | |
923 | ||
924 | retval = initialize_qcow2_image(fd, fs, img); | |
925 | if (retval) { | |
926 | com_err(program_name, retval, | |
927 | "while initializing ext2_qcow2_image"); | |
928 | exit(1); | |
929 | } | |
930 | header_size = align_offset(sizeof(struct ext2_qcow2_hdr), | |
931 | img->cluster_size); | |
932 | write_header(fd, img->hdr, sizeof(struct ext2_qcow2_hdr), header_size); | |
933 | ||
934 | /* Refcount all qcow2 related metadata up to refcount_block_offset */ | |
935 | end = img->refcount.refcount_block_offset; | |
936 | if (ext2fs_llseek(fd, end, SEEK_SET) < 0) | |
937 | lseek_error_and_exit(errno); | |
938 | blk = end + img->cluster_size; | |
939 | for (offset = 0; offset <= end; offset += img->cluster_size) { | |
940 | if (update_refcount(fd, img, offset, blk)) { | |
941 | blk += img->cluster_size; | |
942 | /* | |
943 | * If we create new refcount block, we need to refcount | |
944 | * it as well. | |
945 | */ | |
946 | end += img->cluster_size; | |
947 | } | |
948 | } | |
949 | if (ext2fs_llseek(fd, offset, SEEK_SET) < 0) | |
950 | lseek_error_and_exit(errno); | |
951 | ||
952 | retval = ext2fs_get_mem(fs->blocksize, &buf); | |
953 | if (retval) { | |
954 | com_err(program_name, retval, "while allocating buffer"); | |
955 | exit(1); | |
956 | } | |
957 | /* Write qcow2 data blocks */ | |
958 | for (blk = 0; blk < ext2fs_blocks_count(fs->super); blk++) { | |
959 | if ((blk >= fs->super->s_first_data_block) && | |
960 | ext2fs_test_block_bitmap2(meta_block_map, blk)) { | |
961 | retval = io_channel_read_blk64(fs->io, blk, 1, buf); | |
962 | if (retval) { | |
963 | com_err(program_name, retval, | |
964 | "error reading block %llu", blk); | |
965 | continue; | |
966 | } | |
967 | if (scramble_block_map && | |
968 | ext2fs_test_block_bitmap2(scramble_block_map, blk)) | |
969 | scramble_dir_block(fs, blk, buf); | |
970 | if (check_zero_block(buf, fs->blocksize)) | |
971 | continue; | |
972 | ||
973 | if (update_refcount(fd, img, offset, offset)) { | |
974 | /* Make space for another refcount block */ | |
975 | offset += img->cluster_size; | |
976 | if (ext2fs_llseek(fd, offset, SEEK_SET) < 0) | |
977 | lseek_error_and_exit(errno); | |
978 | /* | |
979 | * We have created the new refcount block, this | |
980 | * means that we need to refcount it as well. | |
981 | * So the previous update_refcount refcounted | |
982 | * the block itself and now we are going to | |
983 | * create refcount for data. New refcount | |
984 | * block should not be created! | |
985 | */ | |
986 | if (update_refcount(fd, img, offset, offset)) { | |
987 | fprintf(stderr, "Programming error: " | |
988 | "multiple sequential refcount " | |
989 | "blocks created!\n"); | |
990 | exit(1); | |
991 | } | |
992 | } | |
993 | ||
994 | generic_write(fd, buf, fs->blocksize, 0); | |
995 | ||
996 | if (add_l2_item(img, blk, offset, | |
997 | offset + img->cluster_size)) { | |
998 | offset += img->cluster_size; | |
999 | if (update_refcount(fd, img, offset, | |
1000 | offset + img->cluster_size)) { | |
1001 | offset += img->cluster_size; | |
1002 | if (update_refcount(fd, img, offset, | |
1003 | offset)) { | |
1004 | fprintf(stderr, | |
1005 | "Programming error: multiple sequential refcount " | |
1006 | "blocks created!\n"); | |
1007 | exit(1); | |
1008 | } | |
1009 | } | |
1010 | offset += img->cluster_size; | |
1011 | if (ext2fs_llseek(fd, offset, SEEK_SET) < 0) | |
1012 | lseek_error_and_exit(errno); | |
1013 | continue; | |
1014 | } | |
1015 | ||
1016 | offset += img->cluster_size; | |
1017 | } | |
1018 | } | |
1019 | update_refcount(fd, img, offset, offset); | |
1020 | flush_l2_cache(img); | |
1021 | sync_refcount(fd, img); | |
1022 | ||
1023 | /* Write l1_table*/ | |
1024 | if (ext2fs_llseek(fd, img->l1_offset, SEEK_SET) < 0) | |
1025 | lseek_error_and_exit(errno); | |
1026 | size = img->l1_size * sizeof(__u64); | |
1027 | generic_write(fd, (char *)img->l1_table, size, 0); | |
1028 | ||
1029 | ext2fs_free_mem(&buf); | |
1030 | free_qcow2_image(img); | |
1031 | } | |
1032 | ||
1033 | static void write_raw_image_file(ext2_filsys fs, int fd, int type, int flags) | |
6304baf2 TT |
1034 | { |
1035 | struct process_block_struct pb; | |
1036 | struct ext2_inode inode; | |
1037 | ext2_inode_scan scan; | |
1038 | ext2_ino_t ino; | |
1039 | errcode_t retval; | |
1040 | char * block_buf; | |
efc6f628 | 1041 | |
bf0449b1 | 1042 | meta_blocks_count = 0; |
6304baf2 TT |
1043 | retval = ext2fs_allocate_block_bitmap(fs, "in-use block map", |
1044 | &meta_block_map); | |
1045 | if (retval) { | |
1046 | com_err(program_name, retval, "while allocating block bitmap"); | |
1047 | exit(1); | |
1048 | } | |
d851ed39 | 1049 | |
bf0449b1 | 1050 | if (flags & E2IMAGE_SCRAMBLE_FLAG) { |
d851ed39 TT |
1051 | retval = ext2fs_allocate_block_bitmap(fs, "scramble block map", |
1052 | &scramble_block_map); | |
1053 | if (retval) { | |
efc6f628 | 1054 | com_err(program_name, retval, |
d851ed39 TT |
1055 | "while allocating scramble block bitmap"); |
1056 | exit(1); | |
1057 | } | |
1058 | } | |
efc6f628 | 1059 | |
6304baf2 TT |
1060 | mark_table_blocks(fs); |
1061 | ||
1062 | retval = ext2fs_open_inode_scan(fs, 0, &scan); | |
1063 | if (retval) { | |
1064 | com_err(program_name, retval, _("while opening inode scan")); | |
1065 | exit(1); | |
1066 | } | |
1067 | ||
bf0449b1 LC |
1068 | retval = ext2fs_get_mem(fs->blocksize * 3, &block_buf); |
1069 | if (retval) { | |
6304baf2 TT |
1070 | com_err(program_name, 0, "Can't allocate block buffer"); |
1071 | exit(1); | |
1072 | } | |
efc6f628 | 1073 | |
4ea7bd04 | 1074 | use_inode_shortcuts(fs, 1); |
6304baf2 TT |
1075 | stashed_inode = &inode; |
1076 | while (1) { | |
1077 | retval = ext2fs_get_next_inode(scan, &ino, &inode); | |
3432a916 TT |
1078 | if (retval == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE) |
1079 | continue; | |
6304baf2 TT |
1080 | if (retval) { |
1081 | com_err(program_name, retval, | |
1082 | _("while getting next inode")); | |
1083 | exit(1); | |
1084 | } | |
1085 | if (ino == 0) | |
1086 | break; | |
ed909bbe TT |
1087 | if (!inode.i_links_count) |
1088 | continue; | |
a63745e8 | 1089 | if (ext2fs_file_acl_block(&inode)) { |
3c041a51 | 1090 | ext2fs_mark_block_bitmap2(meta_block_map, |
a63745e8 | 1091 | ext2fs_file_acl_block(&inode)); |
bf0449b1 | 1092 | meta_blocks_count++; |
ed909bbe TT |
1093 | } |
1094 | if (!ext2fs_inode_has_valid_blocks(&inode)) | |
6304baf2 | 1095 | continue; |
efc6f628 | 1096 | |
6304baf2 | 1097 | stashed_ino = ino; |
d851ed39 TT |
1098 | pb.ino = ino; |
1099 | pb.is_dir = LINUX_S_ISDIR(inode.i_mode); | |
1c1e0049 | 1100 | if (LINUX_S_ISDIR(inode.i_mode) || |
eca53e3c TT |
1101 | (LINUX_S_ISLNK(inode.i_mode) && |
1102 | ext2fs_inode_has_valid_blocks(&inode)) || | |
1c1e0049 | 1103 | ino == fs->super->s_journal_inum) { |
d991bc74 | 1104 | retval = ext2fs_block_iterate3(fs, ino, |
43323be9 TT |
1105 | BLOCK_FLAG_READ_ONLY, block_buf, |
1106 | process_dir_block, &pb); | |
6304baf2 TT |
1107 | if (retval) { |
1108 | com_err(program_name, retval, | |
d0ff90d5 | 1109 | "while iterating over inode %u", |
6304baf2 TT |
1110 | ino); |
1111 | exit(1); | |
1112 | } | |
1113 | } else { | |
43323be9 TT |
1114 | if ((inode.i_flags & EXT4_EXTENTS_FL) || |
1115 | inode.i_block[EXT2_IND_BLOCK] || | |
6304baf2 TT |
1116 | inode.i_block[EXT2_DIND_BLOCK] || |
1117 | inode.i_block[EXT2_TIND_BLOCK]) { | |
d991bc74 | 1118 | retval = ext2fs_block_iterate3(fs, |
43323be9 | 1119 | ino, BLOCK_FLAG_READ_ONLY, block_buf, |
6304baf2 TT |
1120 | process_file_block, &pb); |
1121 | if (retval) { | |
1122 | com_err(program_name, retval, | |
d0ff90d5 | 1123 | "while iterating over inode %u", ino); |
6304baf2 TT |
1124 | exit(1); |
1125 | } | |
1126 | } | |
6304baf2 TT |
1127 | } |
1128 | } | |
4ea7bd04 | 1129 | use_inode_shortcuts(fs, 0); |
bf0449b1 LC |
1130 | |
1131 | if (type & E2IMAGE_QCOW2) | |
1132 | output_qcow2_meta_data_blocks(fs, fd); | |
1133 | else | |
1134 | output_meta_data_blocks(fs, fd); | |
1135 | ||
1136 | ext2fs_free_mem(&block_buf); | |
1137 | ext2fs_close_inode_scan(scan); | |
1138 | ext2fs_free_block_bitmap(meta_block_map); | |
1139 | if (type & E2IMAGE_SCRAMBLE_FLAG) | |
1140 | ext2fs_free_block_bitmap(scramble_block_map); | |
6304baf2 TT |
1141 | } |
1142 | ||
bf0449b1 | 1143 | static void install_image(char *device, char *image_fn, int type) |
8c6b6483 | 1144 | { |
8c6b6483 TT |
1145 | errcode_t retval; |
1146 | ext2_filsys fs; | |
1147 | int open_flag = EXT2_FLAG_IMAGE_FILE; | |
1148 | int fd = 0; | |
1149 | io_manager io_ptr; | |
bf0449b1 | 1150 | io_channel io; |
8c6b6483 | 1151 | |
bf0449b1 LC |
1152 | if (type) { |
1153 | com_err(program_name, 0, "Raw and qcow2 images cannot" | |
1154 | "be installed"); | |
8c6b6483 TT |
1155 | exit(1); |
1156 | } | |
efc6f628 | 1157 | |
8c6b6483 | 1158 | #ifdef CONFIG_TESTIO_DEBUG |
f38cf3cb TT |
1159 | if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) { |
1160 | io_ptr = test_io_manager; | |
1161 | test_io_backing_manager = unix_io_manager; | |
1162 | } else | |
8c6b6483 | 1163 | #endif |
f38cf3cb | 1164 | io_ptr = unix_io_manager; |
8c6b6483 TT |
1165 | |
1166 | retval = ext2fs_open (image_fn, open_flag, 0, 0, | |
1167 | io_ptr, &fs); | |
1168 | if (retval) { | |
1169 | com_err (program_name, retval, _("while trying to open %s"), | |
1170 | image_fn); | |
1171 | exit(1); | |
1172 | } | |
1173 | ||
1174 | retval = ext2fs_read_bitmaps (fs); | |
1175 | if (retval) { | |
1176 | com_err(program_name, retval, "error reading bitmaps"); | |
1177 | exit(1); | |
1178 | } | |
1179 | ||
9fbec969 TT |
1180 | #ifdef HAVE_OPEN64 |
1181 | fd = open64(image_fn, O_RDONLY); | |
1182 | #else | |
8c6b6483 | 1183 | fd = open(image_fn, O_RDONLY); |
9fbec969 | 1184 | #endif |
8c6b6483 TT |
1185 | if (fd < 0) { |
1186 | perror(image_fn); | |
1187 | exit(1); | |
1188 | } | |
1189 | ||
efc6f628 | 1190 | retval = io_ptr->open(device, IO_FLAG_RW, &io); |
8c6b6483 | 1191 | if (retval) { |
6e82cd7e | 1192 | com_err(device, 0, "while opening device file"); |
8c6b6483 TT |
1193 | exit(1); |
1194 | } | |
1195 | ||
8c6b6483 TT |
1196 | ext2fs_rewrite_to_io(fs, io); |
1197 | ||
bf0449b1 LC |
1198 | if (ext2fs_llseek(fd, fs->image_header->offset_inode, SEEK_SET) < 0) { |
1199 | perror("ext2fs_llseek"); | |
8c6b6483 TT |
1200 | exit(1); |
1201 | } | |
1202 | ||
1203 | retval = ext2fs_image_inode_read(fs, fd, 0); | |
1204 | if (retval) { | |
1205 | com_err(image_fn, 0, "while restoring the image table"); | |
1206 | exit(1); | |
1207 | } | |
1208 | ||
1209 | ext2fs_close (fs); | |
1210 | exit (0); | |
1211 | } | |
1212 | ||
92dcfb76 LC |
1213 | static struct ext2_qcow2_hdr *check_qcow2_image(int *fd, char *name) |
1214 | { | |
1215 | ||
1216 | #ifdef HAVE_OPEN64 | |
1217 | *fd = open64(name, O_RDONLY, 0600); | |
1218 | #else | |
1219 | *fd = open(name, O_RDONLY, 0600); | |
1220 | #endif | |
1221 | if (*fd < 0) | |
1222 | return NULL; | |
1223 | ||
1224 | return qcow2_read_header(*fd); | |
1225 | } | |
1226 | ||
6304baf2 TT |
1227 | int main (int argc, char ** argv) |
1228 | { | |
1229 | int c; | |
1230 | errcode_t retval; | |
1231 | ext2_filsys fs; | |
8c6b6483 | 1232 | char *image_fn; |
92dcfb76 | 1233 | struct ext2_qcow2_hdr *header = NULL; |
d991bc74 | 1234 | int open_flag = EXT2_FLAG_64BITS; |
bf0449b1 LC |
1235 | int img_type = 0; |
1236 | int flags = 0; | |
92dcfb76 | 1237 | int qcow2_fd = 0; |
6304baf2 | 1238 | int fd = 0; |
92dcfb76 | 1239 | int ret = 0; |
6304baf2 TT |
1240 | |
1241 | #ifdef ENABLE_NLS | |
1242 | setlocale(LC_MESSAGES, ""); | |
14308a53 | 1243 | setlocale(LC_CTYPE, ""); |
6304baf2 TT |
1244 | bindtextdomain(NLS_CAT_NAME, LOCALEDIR); |
1245 | textdomain(NLS_CAT_NAME); | |
1246 | #endif | |
0f8973fb TT |
1247 | fprintf (stderr, "e2image %s (%s)\n", E2FSPROGS_VERSION, |
1248 | E2FSPROGS_DATE); | |
6304baf2 TT |
1249 | if (argc && *argv) |
1250 | program_name = *argv; | |
a6d8302b | 1251 | add_error_table(&et_ext2_error_table); |
bf0449b1 | 1252 | while ((c = getopt(argc, argv, "rsIQ")) != EOF) |
6304baf2 | 1253 | switch (c) { |
bf0449b1 LC |
1254 | case 'I': |
1255 | flags |= E2IMAGE_INSTALL_FLAG; | |
1256 | break; | |
1257 | case 'Q': | |
1258 | if (img_type) | |
1259 | usage(); | |
1260 | img_type |= E2IMAGE_QCOW2; | |
1261 | break; | |
6304baf2 | 1262 | case 'r': |
bf0449b1 LC |
1263 | if (img_type) |
1264 | usage(); | |
1265 | img_type |= E2IMAGE_RAW; | |
6304baf2 | 1266 | break; |
d851ed39 | 1267 | case 's': |
bf0449b1 | 1268 | flags |= E2IMAGE_SCRAMBLE_FLAG; |
8c6b6483 | 1269 | break; |
6304baf2 TT |
1270 | default: |
1271 | usage(); | |
1272 | } | |
1273 | if (optind != argc - 2 ) | |
1274 | usage(); | |
1275 | device_name = argv[optind]; | |
8c6b6483 TT |
1276 | image_fn = argv[optind+1]; |
1277 | ||
bf0449b1 LC |
1278 | if (flags & E2IMAGE_INSTALL_FLAG) { |
1279 | install_image(device_name, image_fn, img_type); | |
6e82cd7e | 1280 | exit (0); |
8c6b6483 TT |
1281 | } |
1282 | ||
92dcfb76 LC |
1283 | if (img_type & E2IMAGE_RAW) { |
1284 | header = check_qcow2_image(&qcow2_fd, device_name); | |
1285 | if (header) { | |
1286 | flags |= E2IMAGE_IS_QCOW2_FLAG; | |
1287 | goto skip_device; | |
1288 | } | |
1289 | } | |
1290 | ||
6304baf2 TT |
1291 | retval = ext2fs_open (device_name, open_flag, 0, 0, |
1292 | unix_io_manager, &fs); | |
1293 | if (retval) { | |
1294 | com_err (program_name, retval, _("while trying to open %s"), | |
1295 | device_name); | |
54434927 | 1296 | fputs(_("Couldn't find valid filesystem superblock.\n"), stdout); |
6304baf2 TT |
1297 | exit(1); |
1298 | } | |
1299 | ||
92dcfb76 | 1300 | skip_device: |
8c6b6483 | 1301 | if (strcmp(image_fn, "-") == 0) |
1c1e0049 TT |
1302 | fd = 1; |
1303 | else { | |
6304baf2 | 1304 | #ifdef HAVE_OPEN64 |
8c6b6483 | 1305 | fd = open64(image_fn, O_CREAT|O_TRUNC|O_WRONLY, 0600); |
6304baf2 | 1306 | #else |
8c6b6483 | 1307 | fd = open(image_fn, O_CREAT|O_TRUNC|O_WRONLY, 0600); |
6304baf2 | 1308 | #endif |
1c1e0049 TT |
1309 | if (fd < 0) { |
1310 | com_err(program_name, errno, | |
1311 | _("while trying to open %s"), argv[optind+1]); | |
1312 | exit(1); | |
1313 | } | |
6304baf2 TT |
1314 | } |
1315 | ||
bf0449b1 LC |
1316 | if ((img_type & E2IMAGE_QCOW2) && (fd == 1)) { |
1317 | com_err(program_name, 0, "QCOW2 image can not be written to " | |
1318 | "the stdout!\n"); | |
1319 | exit(1); | |
1320 | } | |
1321 | ||
92dcfb76 LC |
1322 | if (flags & E2IMAGE_IS_QCOW2_FLAG) { |
1323 | ret = qcow2_write_raw_image(qcow2_fd, fd, header); | |
1324 | if (ret) { | |
1325 | if (ret == -QCOW_COMPRESSED) | |
1326 | fprintf(stderr, "Image (%s) is compressed\n", | |
1327 | image_fn); | |
1328 | if (ret == -QCOW_ENCRYPTED) | |
1329 | fprintf(stderr, "Image (%s) is encrypted\n", | |
1330 | image_fn); | |
1331 | com_err(program_name, ret, | |
1332 | _("while trying to convert qcow2 image" | |
1333 | " (%s) into raw image (%s)"), | |
1334 | device_name, image_fn); | |
1335 | } | |
1336 | goto out; | |
1337 | } | |
1338 | ||
1339 | ||
bf0449b1 LC |
1340 | if (img_type) |
1341 | write_raw_image_file(fs, fd, img_type, flags); | |
6304baf2 TT |
1342 | else |
1343 | write_image_file(fs, fd); | |
c5423c5b | 1344 | |
72ed1264 | 1345 | ext2fs_close (fs); |
92dcfb76 LC |
1346 | out: |
1347 | if (header) | |
1348 | free(header); | |
1349 | if (qcow2_fd) | |
1350 | close(qcow2_fd); | |
a6d8302b | 1351 | remove_error_table(&et_ext2_error_table); |
92dcfb76 | 1352 | return ret; |
72ed1264 | 1353 | } |