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Update release notes, etc., for the 1.47.2 release
[e2fsprogs.git] / debugfs / logdump.c
blob324ed425c9797d4ac3096faf486c76f36b442f54
1 /*
2 * logdump.c --- dump the contents of the journal out to a file
3 *
4 * Author: Stephen C. Tweedie, 2001 <sct@redhat.com>
5 * Copyright (C) 2001 Red Hat, Inc.
6 * Based on portions Copyright (C) 1994 Theodore Ts'o.
7 *
8 * This file may be redistributed under the terms of the GNU Public
9 * License.
10 */
11
12 #include "config.h"
13 #include <stdio.h>
14 #include <unistd.h>
15 #include <stdlib.h>
16 #include <ctype.h>
17 #include <string.h>
18 #include <time.h>
19 #ifdef HAVE_ERRNO_H
20 #include <errno.h>
21 #endif
22 #include <sys/types.h>
23 #include <sys/stat.h>
24 #include <fcntl.h>
25 #include <utime.h>
26 #ifdef HAVE_GETOPT_H
27 #include <getopt.h>
28 #else
29 extern int optind;
30 extern char *optarg;
31 #endif
32
33 #include "debugfs.h"
34 #include "blkid/blkid.h"
35 #include "jfs_user.h"
36 #if __GNUC_PREREQ (4, 6)
37 #pragma GCC diagnostic push
38 #pragma GCC diagnostic ignored "-Wunused-function"
39 #endif
40 #include "ext2fs/fast_commit.h"
41 #if __GNUC_PREREQ (4, 6)
42 #pragma GCC diagnostic pop
43 #endif
44 #include <uuid/uuid.h>
45
46 enum journal_location {JOURNAL_IS_INTERNAL, JOURNAL_IS_EXTERNAL};
47
48 #define ANY_BLOCK ((blk64_t) -1)
49
50 static int dump_all, dump_super, dump_old, dump_contents, dump_descriptors;
51 static int64_t dump_counts;
52 static blk64_t block_to_dump, bitmap_to_dump, inode_block_to_dump;
53 static unsigned int group_to_dump, inode_offset_to_dump;
54 static ext2_ino_t inode_to_dump;
55 static bool wrapped_flag;
56
57 struct journal_source
58 {
59 enum journal_location where;
60 int fd;
61 ext2_file_t file;
62 };
63
64 static void dump_journal(char *, FILE *, struct journal_source *);
65
66 static void dump_descriptor_block(FILE *, struct journal_source *,
67 char *, journal_superblock_t *,
68 unsigned int *, unsigned int, __u32, tid_t);
69
70 static void dump_revoke_block(FILE *, char *, journal_superblock_t *,
71 unsigned int, unsigned int, tid_t);
72
73 static void dump_metadata_block(FILE *, struct journal_source *,
74 journal_superblock_t*,
75 unsigned int, unsigned int, unsigned int,
76 unsigned int, tid_t);
77
78 static void dump_fc_block(FILE *out_file, char *buf, int blocksize,
79 tid_t transaction, int *fc_done);
80
81 static void do_hexdump (FILE *, char *, int);
82
83 #define WRAP(jsb, blocknr, maxlen) \
84 if (blocknr >= (maxlen)) { \
85 blocknr -= (maxlen - be32_to_cpu((jsb)->s_first)); \
86 wrapped_flag = true; \
87 }
88
89 void do_logdump(int argc, ss_argv_t argv, int sci_idx EXT2FS_ATTR((unused)),
90 void *infop EXT2FS_ATTR((unused)))
91 {
92 int c;
93 int retval;
94 char *out_fn;
95 FILE *out_file;
96
97 char *inode_spec = NULL;
98 char *journal_fn = NULL;
99 int journal_fd = -1;
100 int use_sb = 0;
101 ext2_ino_t journal_inum;
102 struct ext2_inode journal_inode;
103 ext2_file_t journal_file = NULL;
104 char *tmp;
105 struct journal_source journal_source;
106 struct ext2_super_block *es = NULL;
107
108 journal_source.where = JOURNAL_IS_INTERNAL;
109 journal_source.fd = 0;
110 journal_source.file = 0;
111 dump_all = 0;
112 dump_old = 0;
113 dump_contents = 0;
114 dump_super = 0;
115 dump_descriptors = 1;
116 block_to_dump = ANY_BLOCK;
117 bitmap_to_dump = -1;
118 inode_block_to_dump = ANY_BLOCK;
119 inode_to_dump = -1;
120 dump_counts = -1;
121 wrapped_flag = false;
122
123 reset_getopt();
124 while ((c = getopt (argc, argv, "ab:ci:f:OsSn:")) != EOF) {
125 switch (c) {
126 case 'a':
127 dump_all++;
128 break;
129 case 'b':
130 block_to_dump = strtoul(optarg, &tmp, 0);
131 if (*tmp) {
132 com_err(argv[0], 0,
133 "Bad block number - %s", optarg);
134 return;
135 }
136 dump_descriptors = 0;
137 break;
138 case 'c':
139 dump_contents++;
140 break;
141 case 'f':
142 journal_fn = optarg;
143 break;
144 case 'i':
145 inode_spec = optarg;
146 dump_descriptors = 0;
147 break;
148 case 'O':
149 dump_old++;
150 break;
151 case 's':
152 use_sb++;
153 break;
154 case 'S':
155 dump_super++;
156 break;
157 case 'n':
158 dump_counts = strtol(optarg, &tmp, 10);
159 if (*tmp) {
160 com_err(argv[0], 0,
161 "Bad log counts number - %s", optarg);
162 return;
163 }
164 break;
165 default:
166 goto print_usage;
167 }
168 }
169 if (optind != argc && optind != argc-1) {
170 goto print_usage;
171 }
172
173 if (inode_spec) {
174 int inode_group, group_offset, inodes_per_block;
175
176 if (check_fs_open(argv[0]))
177 return;
178
179 inode_to_dump = string_to_inode(inode_spec);
180 if (!inode_to_dump)
181 return;
182
183 es = current_fs->super;
184 inode_group = ((inode_to_dump - 1)
185 / es->s_inodes_per_group);
186 group_offset = ((inode_to_dump - 1)
187 % es->s_inodes_per_group);
188 inodes_per_block = (current_fs->blocksize
189 / sizeof(struct ext2_inode));
190
191 inode_block_to_dump =
192 ext2fs_inode_table_loc(current_fs, inode_group) +
193 (group_offset / inodes_per_block);
194 inode_offset_to_dump = ((group_offset % inodes_per_block)
195 * sizeof(struct ext2_inode));
196 printf("Inode %u is at group %u, block %llu, offset %u\n",
197 inode_to_dump, inode_group,
198 (unsigned long long) inode_block_to_dump,
199 inode_offset_to_dump);
200 }
201
202 if (optind == argc) {
203 out_file = stdout;
204 } else {
205 out_fn = argv[optind];
206 out_file = fopen(out_fn, "w");
207 if (!out_file) {
208 com_err(argv[0], errno, "while opening %s for logdump",
209 out_fn);
210 goto cleanup;
211 }
212 }
213
214 if (block_to_dump != ANY_BLOCK) {
215 if (check_fs_open(argv[0]))
216 goto cleanup;
217 es = current_fs->super;
218 group_to_dump = ((block_to_dump -
219 es->s_first_data_block)
220 / es->s_blocks_per_group);
221 bitmap_to_dump = ext2fs_block_bitmap_loc(current_fs, group_to_dump);
222 }
223
224 if (journal_fn) {
225 /* Set up to read journal from a regular file somewhere */
226 journal_fd = open(journal_fn, O_RDONLY, 0);
227 if (journal_fd < 0) {
228 com_err(argv[0], errno, "while opening %s for logdump",
229 journal_fn);
230 goto cleanup;
231 }
232 journal_source.where = JOURNAL_IS_EXTERNAL;
233 journal_source.fd = journal_fd;
234 dump_journal(argv[0], out_file, &journal_source);
235 goto cleanup;
236
237 }
238 if (check_fs_open(argv[0]))
239 goto cleanup;
240 es = current_fs->super;
241
242 if ((journal_inum = es->s_journal_inum)) {
243 if (use_sb) {
244 if (es->s_jnl_backup_type != EXT3_JNL_BACKUP_BLOCKS) {
245 com_err(argv[0], 0,
246 "no journal backup in super block\n");
247 goto cleanup;
248 }
249 memset(&journal_inode, 0, sizeof(struct ext2_inode));
250 memcpy(&journal_inode.i_block[0], es->s_jnl_blocks,
251 EXT2_N_BLOCKS*4);
252 journal_inode.i_size_high = es->s_jnl_blocks[15];
253 journal_inode.i_size = es->s_jnl_blocks[16];
254 journal_inode.i_links_count = 1;
255 journal_inode.i_mode = LINUX_S_IFREG | 0600;
256 } else {
257 if (debugfs_read_inode(journal_inum, &journal_inode,
258 argv[0]))
259 goto cleanup;
260 }
261
262 retval = ext2fs_file_open2(current_fs, journal_inum,
263 &journal_inode, 0, &journal_file);
264 if (retval) {
265 com_err(argv[0], retval, "while opening ext2 file");
266 goto cleanup;
267 }
268 journal_source.where = JOURNAL_IS_INTERNAL;
269 journal_source.file = journal_file;
270 } else {
271 char uuid[37];
272
273 uuid_unparse(es->s_journal_uuid, uuid);
274 journal_fn = blkid_get_devname(NULL, "UUID", uuid);
275 if (!journal_fn)
276 journal_fn = blkid_devno_to_devname(es->s_journal_dev);
277 if (!journal_fn) {
278 com_err(argv[0], 0, "filesystem has no journal");
279 goto cleanup;
280 }
281 journal_fd = open(journal_fn, O_RDONLY, 0);
282 if (journal_fd < 0) {
283 com_err(argv[0], errno, "while opening %s for logdump",
284 journal_fn);
285 free(journal_fn);
286 goto cleanup;
287 }
288 fprintf(out_file, "Using external journal found at %s\n",
289 journal_fn);
290 free(journal_fn);
291 journal_source.where = JOURNAL_IS_EXTERNAL;
292 journal_source.fd = journal_fd;
293 }
294 dump_journal(argv[0], out_file, &journal_source);
295 cleanup:
296 if (journal_fd >= 0)
297 close(journal_fd);
298 if (journal_file)
299 ext2fs_file_close(journal_file);
300 if (out_file && (out_file != stdout))
301 fclose(out_file);
302
303 return;
304
305 print_usage:
306 fprintf(stderr, "%s: Usage: logdump [-acsOS] [-n<num_trans>] [-b<block>] [-i<filespec>]\n\t"
307 "[-f<journal_file>] [output_file]\n", argv[0]);
308 }
309
310
311 static int read_journal_block(const char *cmd, struct journal_source *source,
312 ext2_loff_t offset, char *buf, unsigned int size)
313 {
314 int retval;
315 unsigned int got;
316
317 if (source->where == JOURNAL_IS_EXTERNAL) {
318 if (lseek(source->fd, offset, SEEK_SET) < 0) {
319 retval = errno;
320 goto seek_err;
321 }
322 retval = read(source->fd, buf, size);
323 if (retval < 0) {
324 retval = errno;
325 goto read_err;
326 }
327 got = retval;
328 retval = 0;
329 } else {
330 retval = ext2fs_file_llseek(source->file, offset,
331 EXT2_SEEK_SET, NULL);
332 if (retval) {
333 seek_err:
334 com_err(cmd, retval, "while seeking in reading journal");
335 return retval;
336 }
337 retval = ext2fs_file_read(source->file, buf, size, &got);
338 if (retval) {
339 read_err:
340 com_err(cmd, retval, "while reading journal");
341 return retval;
342 }
343 }
344 if (got != size) {
345 com_err(cmd, 0, "short read (read %u, expected %u) "
346 "while reading journal", got, size);
347 retval = -1;
348 }
349 return retval;
350 }
351
352 static const char *type_to_name(int btype)
353 {
354 switch (btype) {
355 case JBD2_DESCRIPTOR_BLOCK:
356 return "descriptor block";
357 case JBD2_COMMIT_BLOCK:
358 return "commit block";
359 case JBD2_SUPERBLOCK_V1:
360 return "V1 superblock";
361 case JBD2_SUPERBLOCK_V2:
362 return "V2 superblock";
363 case JBD2_REVOKE_BLOCK:
364 return "revoke table";
365 }
366 return "unrecognised type";
367 }
368
369
370 static void dump_journal(char *cmdname, FILE *out_file,
371 struct journal_source *source)
372 {
373 struct ext2_super_block *sb;
374 char jsb_buffer[1024];
375 char buf[EXT2_MAX_BLOCK_SIZE];
376 journal_superblock_t *jsb;
377 unsigned int blocksize = 1024;
378 int retval;
379 __u32 magic, sequence, blocktype;
380 journal_header_t *header;
381 tid_t transaction;
382 unsigned int blocknr = 0;
383 unsigned int first_transaction_blocknr;
384 int fc_done;
385 __u64 total_len;
386 __u32 maxlen;
387 int64_t cur_counts = 0;
388 bool exist_no_magic = false;
389
390 /* First, check to see if there's an ext2 superblock header */
391 retval = read_journal_block(cmdname, source, 0, buf, 2048);
392 if (retval)
393 return;
394
395 jsb = (journal_superblock_t *) buf;
396 sb = (struct ext2_super_block *) (buf+1024);
397 #ifdef WORDS_BIGENDIAN
398 if (sb->s_magic == ext2fs_swab16(EXT2_SUPER_MAGIC))
399 ext2fs_swap_super(sb);
400 #endif
401
402 if ((be32_to_cpu(jsb->s_header.h_magic) != JBD2_MAGIC_NUMBER) &&
403 (sb->s_magic == EXT2_SUPER_MAGIC) &&
404 ext2fs_has_feature_journal_dev(sb)) {
405 blocksize = EXT2_BLOCK_SIZE(sb);
406 blocknr = (blocksize == 1024) ? 2 : 1;
407 uuid_unparse(sb->s_uuid, jsb_buffer);
408 fprintf(out_file, "Ext2 superblock header found.\n");
409 if (dump_all) {
410 fprintf(out_file, "\tuuid=%s\n", jsb_buffer);
411 fprintf(out_file, "\tblocksize=%d\n", blocksize);
412 fprintf(out_file, "\tjournal data size %lu\n",
413 (unsigned long) ext2fs_blocks_count(sb));
414 }
415 }
416
417 /* Next, read the journal superblock */
418 retval = read_journal_block(cmdname, source,
419 ((ext2_loff_t) blocknr) * blocksize,
420 jsb_buffer, 1024);
421 if (retval)
422 return;
423
424 if (dump_super) {
425 e2p_list_journal_super(out_file, jsb_buffer,
426 current_fs->blocksize, 0);
427 fputc('\n', out_file);
428 }
429
430 jsb = (journal_superblock_t *) jsb_buffer;
431 if (be32_to_cpu(jsb->s_header.h_magic) != JBD2_MAGIC_NUMBER) {
432 fprintf(out_file,
433 "Journal superblock magic number invalid!\n");
434 return;
435 }
436 blocksize = be32_to_cpu(jsb->s_blocksize);
437 if ((current_fs && (blocksize != current_fs->blocksize)) ||
438 (!current_fs && (!blocksize || (blocksize & (blocksize - 1)) ||
439 (blocksize > EXT2_MAX_BLOCK_SIZE)))) {
440 fprintf(out_file,
441 "Journal block size invalid: %u (%u)\n",
442 be32_to_cpu(jsb->s_blocksize), blocksize);
443 return;
444 }
445 transaction = be32_to_cpu(jsb->s_sequence);
446 blocknr = be32_to_cpu(jsb->s_start);
447 if (source->where == JOURNAL_IS_INTERNAL) {
448 retval = ext2fs_file_get_lsize(source->file, &total_len);
449 if (retval) {
450 stat_err:
451 com_err("dump_journal", retval,
452 "while getting journal inode size");
453 return;
454 }
455 total_len /= blocksize;
456 } else {
457 struct stat st;
458
459 if (fstat(source->fd, &st) < 0)
460 goto stat_err;
461 total_len = st.st_size / blocksize;
462 }
463 maxlen = be32_to_cpu(jsb->s_maxlen);
464 if (maxlen > total_len)
465 maxlen = total_len;
466
467 fprintf(out_file, "Journal starts at block %u, transaction %u\n",
468 blocknr, transaction);
469
470 if (!blocknr) {
471 /* Empty journal, nothing to do. */
472 if (!dump_old)
473 goto fc;
474 else
475 blocknr = 1;
476 }
477
478 first_transaction_blocknr = blocknr;
479
480 while (1) {
481 if (dump_old && (dump_counts != -1) && (cur_counts >= dump_counts))
482 break;
483
484 if ((blocknr == first_transaction_blocknr) && dump_old && wrapped_flag) {
485 fprintf(out_file, "Dump all %lld journal records.\n",
486 (long long) cur_counts);
487 break;
488 }
489
490 retval = read_journal_block(cmdname, source,
491 ((ext2_loff_t) blocknr) * blocksize,
492 buf, blocksize);
493 if (retval)
494 break;
495
496 header = (journal_header_t *) buf;
497
498 magic = be32_to_cpu(header->h_magic);
499 sequence = be32_to_cpu(header->h_sequence);
500 blocktype = be32_to_cpu(header->h_blocktype);
501
502 if (magic != JBD2_MAGIC_NUMBER) {
503 if (exist_no_magic == false) {
504 exist_no_magic = true;
505 fprintf(out_file, "No magic number at block %u: "
506 "end of journal.\n", blocknr);
507 }
508 if (dump_old && (dump_counts != -1)) {
509 blocknr++;
510 WRAP(jsb, blocknr, maxlen);
511 continue;
512 }
513 break;
514 }
515
516 if (sequence != transaction) {
517 fprintf (out_file, "Found sequence %u (not %u) at "
518 "block %u: end of journal.\n",
519 sequence, transaction, blocknr);
520 if (!dump_old)
521 break;
522 }
523
524 if (dump_descriptors) {
525 fprintf (out_file, "Found expected sequence %u, "
526 "type %u (%s) at block %u\n",
527 sequence, blocktype,
528 type_to_name(blocktype), blocknr);
529 }
530
531 switch (blocktype) {
532 case JBD2_DESCRIPTOR_BLOCK:
533 dump_descriptor_block(out_file, source, buf, jsb,
534 &blocknr, blocksize, maxlen,
535 transaction);
536 continue;
537
538 case JBD2_COMMIT_BLOCK:
539 cur_counts++;
540 transaction++;
541 blocknr++;
542 WRAP(jsb, blocknr, maxlen);
543 continue;
544
545 case JBD2_REVOKE_BLOCK:
546 dump_revoke_block(out_file, buf, jsb,
547 blocknr, blocksize,
548 transaction);
549 blocknr++;
550 WRAP(jsb, blocknr, maxlen);
551 continue;
552
553 default:
554 fprintf (out_file, "Unexpected block type %u at "
555 "block %u.\n", blocktype, blocknr);
556 break;
557 }
558 }
559
560 fc:
561 blocknr = maxlen - jbd2_journal_get_num_fc_blks(jsb) + 1;
562 while (blocknr <= maxlen) {
563 retval = read_journal_block(cmdname, source,
564 ((ext2_loff_t) blocknr) * blocksize,
565 buf, blocksize);
566 if (retval)
567 return;
568
569 dump_fc_block(out_file, buf, blocksize, transaction, &fc_done);
570 if (!dump_old && fc_done)
571 break;
572 blocknr++;
573 }
574 }
575
576 static inline size_t journal_super_tag_bytes(journal_superblock_t *jsb)
577 {
578 size_t sz;
579
580 if (JSB_HAS_INCOMPAT_FEATURE(jsb, JBD2_FEATURE_INCOMPAT_CSUM_V3))
581 return sizeof(journal_block_tag3_t);
582
583 sz = sizeof(journal_block_tag_t);
584
585 if (JSB_HAS_INCOMPAT_FEATURE(jsb, JBD2_FEATURE_INCOMPAT_CSUM_V2))
586 sz += sizeof(__u16);
587
588 if (JSB_HAS_INCOMPAT_FEATURE(jsb, JBD2_FEATURE_INCOMPAT_64BIT))
589 return sz;
590
591 return sz - sizeof(__u32);
592 }
593
594 static void dump_fc_block(FILE *out_file, char *buf, int blocksize,
595 tid_t transaction, int *fc_done)
596 {
597 struct ext4_fc_tl tl;
598 struct ext4_fc_head *head;
599 struct ext4_fc_add_range *add_range;
600 struct ext4_fc_del_range *del_range;
601 struct ext4_fc_dentry_info *dentry_info;
602 struct ext4_fc_tail *tail;
603 struct ext3_extent *ex;
604 __u8 *cur, *val;
605
606 *fc_done = 0;
607 for (cur = (__u8 *)buf; cur < (__u8 *)buf + blocksize;
608 cur = cur + sizeof(tl) + le16_to_cpu(tl.fc_len)) {
609 memcpy(&tl, cur, sizeof(tl));
610 val = cur + sizeof(tl);
611
612 switch (le16_to_cpu(tl.fc_tag)) {
613 case EXT4_FC_TAG_ADD_RANGE:
614 add_range = (struct ext4_fc_add_range *)val;
615 ex = (struct ext3_extent *)add_range->fc_ex;
616 fprintf(out_file,
617 "tag %s, inode %d, lblk %u, pblk %llu, len %lu\n",
618 tag2str(tl.fc_tag),
619 le32_to_cpu(add_range->fc_ino),
620 le32_to_cpu(ex->ee_block),
621 le32_to_cpu(ex->ee_start) +
622 (((unsigned long long) le16_to_cpu(ex->ee_start_hi)) << 32),
623 le16_to_cpu(ex->ee_len) > EXT_INIT_MAX_LEN ?
624 le16_to_cpu(ex->ee_len) - EXT_INIT_MAX_LEN :
625 le16_to_cpu(ex->ee_len));
626 break;
627 case EXT4_FC_TAG_DEL_RANGE:
628 del_range = (struct ext4_fc_del_range *)val;
629 fprintf(out_file, "tag %s, inode %d, lblk %d, len %d\n",
630 tag2str(tl.fc_tag),
631 le32_to_cpu(del_range->fc_ino),
632 le32_to_cpu(del_range->fc_lblk),
633 le32_to_cpu(del_range->fc_len));
634 break;
635 case EXT4_FC_TAG_LINK:
636 case EXT4_FC_TAG_UNLINK:
637 case EXT4_FC_TAG_CREAT:
638 dentry_info = (struct ext4_fc_dentry_info *)val;
639 fprintf(out_file,
640 "tag %s, parent %d, ino %d, name \"%s\"\n",
641 tag2str(tl.fc_tag),
642 le32_to_cpu(dentry_info->fc_parent_ino),
643 le32_to_cpu(dentry_info->fc_ino),
644 dentry_info->fc_dname);
645 break;
646 case EXT4_FC_TAG_INODE:
647 fprintf(out_file, "tag %s, inode %d\n",
648 tag2str(tl.fc_tag),
649 le32_to_cpu(((struct ext4_fc_inode *)val)->fc_ino));
650 break;
651 case EXT4_FC_TAG_PAD:
652 fprintf(out_file, "tag %s\n", tag2str(tl.fc_tag));
653 break;
654 case EXT4_FC_TAG_TAIL:
655 tail = (struct ext4_fc_tail *)val;
656 fprintf(out_file, "tag %s, tid %d\n",
657 tag2str(tl.fc_tag),
658 le32_to_cpu(tail->fc_tid));
659 if (!dump_old &&
660 le32_to_cpu(tail->fc_tid) < transaction) {
661 *fc_done = 1;
662 return;
663 }
664 break;
665 case EXT4_FC_TAG_HEAD:
666 fprintf(out_file, "\n*** Fast Commit Area ***\n");
667 head = (struct ext4_fc_head *)val;
668 fprintf(out_file, "tag %s, features 0x%x, tid %d\n",
669 tag2str(tl.fc_tag),
670 le32_to_cpu(head->fc_features),
671 le32_to_cpu(head->fc_tid));
672 if (!dump_old &&
673 le32_to_cpu(head->fc_tid) < transaction) {
674 *fc_done = 1;
675 return;
676 }
677 break;
678 default:
679 *fc_done = 1;
680 break;
681 }
682 }
683 }
684
685 static void dump_descriptor_block(FILE *out_file,
686 struct journal_source *source,
687 char *buf,
688 journal_superblock_t *jsb,
689 unsigned int *blockp, unsigned blocksize,
690 __u32 maxlen,
691 tid_t transaction)
692 {
693 unsigned offset, tag_size, csum_size = 0;
694 char *tagp;
695 journal_block_tag_t *tag;
696 unsigned int blocknr;
697 __u32 tag_block;
698 __u32 tag_flags;
699
700 tag_size = journal_super_tag_bytes(jsb);
701 offset = sizeof(journal_header_t);
702 blocknr = *blockp;
703
704 if (JSB_HAS_INCOMPAT_FEATURE(jsb, JBD2_FEATURE_INCOMPAT_CSUM_V3) ||
705 JSB_HAS_INCOMPAT_FEATURE(jsb, JBD2_FEATURE_INCOMPAT_CSUM_V2))
706 csum_size = sizeof(struct jbd2_journal_block_tail);
707
708 if (dump_all)
709 fprintf(out_file, "Dumping descriptor block, sequence %u, at "
710 "block %u:\n", transaction, blocknr);
711
712 ++blocknr;
713 WRAP(jsb, blocknr, maxlen);
714
715 do {
716 /* Work out the location of the current tag, and skip to
717 * the next one... */
718 tagp = &buf[offset];
719 tag = (journal_block_tag_t *) tagp;
720 offset += tag_size;
721
722 /* ... and if we have gone too far, then we've reached the
723 end of this block. */
724 if (offset > blocksize - csum_size)
725 break;
726
727 tag_block = be32_to_cpu(tag->t_blocknr);
728 tag_flags = be16_to_cpu(tag->t_flags);
729
730 if (!(tag_flags & JBD2_FLAG_SAME_UUID))
731 offset += 16;
732
733 dump_metadata_block(out_file, source, jsb,
734 blocknr, tag_block, tag_flags, blocksize,
735 transaction);
736
737 ++blocknr;
738 WRAP(jsb, blocknr, maxlen);
739
740 } while (!(tag_flags & JBD2_FLAG_LAST_TAG));
741
742 *blockp = blocknr;
743 }
744
745
746 static void dump_revoke_block(FILE *out_file, char *buf,
747 journal_superblock_t *jsb EXT2FS_ATTR((unused)),
748 unsigned int blocknr,
749 unsigned int blocksize,
750 tid_t transaction)
751 {
752 unsigned int offset, max;
753 jbd2_journal_revoke_header_t *header;
754 unsigned long long rblock;
755 int tag_size = sizeof(__u32);
756
757 if (dump_all)
758 fprintf(out_file, "Dumping revoke block, sequence %u, at "
759 "block %u:\n", transaction, blocknr);
760
761 if (be32_to_cpu(jsb->s_feature_incompat) & JBD2_FEATURE_INCOMPAT_64BIT)
762 tag_size = sizeof(__u64);
763
764 header = (jbd2_journal_revoke_header_t *) buf;
765 offset = sizeof(jbd2_journal_revoke_header_t);
766 max = be32_to_cpu(header->r_count);
767 if (max > blocksize) {
768 fprintf(out_file, "Revoke block's r_count invalid: %u\b",
769 max);
770 max = blocksize;
771 }
772
773 while (offset < max) {
774 if (tag_size == sizeof(__u32)) {
775 __u32 *entry = (__u32 *) (buf + offset);
776 rblock = be32_to_cpu(*entry);
777 } else {
778 __u64 *entry = (__u64 *) (buf + offset);
779 rblock = ext2fs_be64_to_cpu(*entry);
780 }
781 if (dump_all || rblock == block_to_dump) {
782 fprintf(out_file, " Revoke FS block %llu",
783 (unsigned long long) rblock);
784 if (dump_all)
785 fprintf(out_file, "\n");
786 else
787 fprintf(out_file," at block %u, sequence %u\n",
788 blocknr, transaction);
789 }
790 offset += tag_size;
791 }
792 }
793
794
795 static void show_extent(FILE *out_file, int start_extent, int end_extent,
796 __u32 first_block)
797 {
798 if (start_extent >= 0 && first_block != 0)
799 fprintf(out_file, "(%d+%u): %u ",
800 start_extent, end_extent-start_extent, first_block);
801 }
802
803 static void show_indirect(FILE *out_file, const char *name, __u32 where)
804 {
805 if (where)
806 fprintf(out_file, "(%s): %u ", name, where);
807 }
808
809
810 static void dump_metadata_block(FILE *out_file, struct journal_source *source,
811 journal_superblock_t *jsb EXT2FS_ATTR((unused)),
812 unsigned int log_blocknr,
813 unsigned int fs_blocknr,
814 unsigned int log_tag_flags,
815 unsigned int blocksize,
816 tid_t transaction)
817 {
818 int retval;
819 char buf[EXT2_MAX_BLOCK_SIZE];
820
821 if (!(dump_all
822 || (fs_blocknr == block_to_dump)
823 || (fs_blocknr == inode_block_to_dump)
824 || (fs_blocknr == bitmap_to_dump)))
825 return;
826
827 fprintf(out_file, " FS block %u logged at ", fs_blocknr);
828 if (!dump_all)
829 fprintf(out_file, "sequence %u, ", transaction);
830 fprintf(out_file, "journal block %u (flags 0x%x)\n", log_blocknr,
831 log_tag_flags);
832
833 /* There are two major special cases to parse:
834 *
835 * If this block is a block
836 * bitmap block, we need to give it special treatment so that we
837 * can log any allocates and deallocates which affect the
838 * block_to_dump query block.
839 *
840 * If the block is an inode block for the inode being searched
841 * for, then we need to dump the contents of that inode
842 * structure symbolically.
843 */
844
845 if (!(dump_contents && dump_all)
846 && fs_blocknr != block_to_dump
847 && fs_blocknr != bitmap_to_dump
848 && fs_blocknr != inode_block_to_dump)
849 return;
850
851 retval = read_journal_block("logdump", source,
852 ((ext2_loff_t) log_blocknr) * blocksize,
853 buf, blocksize);
854 if (retval)
855 return;
856
857 if (fs_blocknr == bitmap_to_dump) {
858 struct ext2_super_block *super;
859 int offset;
860
861 super = current_fs->super;
862 offset = ((block_to_dump - super->s_first_data_block) %
863 super->s_blocks_per_group);
864
865 fprintf(out_file, " (block bitmap for block %llu: "
866 "block is %s)\n",
867 (unsigned long long) block_to_dump,
868 ext2fs_test_bit(offset, buf) ? "SET" : "CLEAR");
869 }
870
871 if (fs_blocknr == inode_block_to_dump) {
872 struct ext2_inode *inode;
873 int first, prev, this, start_extent, i;
874
875 fprintf(out_file, " (inode block for inode %u):\n",
876 inode_to_dump);
877
878 inode = (struct ext2_inode *) (buf + inode_offset_to_dump);
879 internal_dump_inode(out_file, " ", inode_to_dump, inode, 0);
880
881 /* Dump out the direct/indirect blocks here:
882 * internal_dump_inode can only dump them from the main
883 * on-disk inode, not from the journaled copy of the
884 * inode. */
885
886 fprintf (out_file, " Blocks: ");
887 first = prev = start_extent = -1;
888
889 for (i=0; i<EXT2_NDIR_BLOCKS; i++) {
890 this = inode->i_block[i];
891 if (start_extent >= 0 && this == prev+1) {
892 prev = this;
893 continue;
894 } else {
895 show_extent(out_file, start_extent, i, first);
896 start_extent = i;
897 first = prev = this;
898 }
899 }
900 show_extent(out_file, start_extent, i, first);
901 show_indirect(out_file, "IND", inode->i_block[i++]);
902 show_indirect(out_file, "DIND", inode->i_block[i++]);
903 show_indirect(out_file, "TIND", inode->i_block[i++]);
904
905 fprintf(out_file, "\n");
906 }
907
908 if (dump_contents)
909 do_hexdump(out_file, buf, blocksize);
910
911 }
912
913 static void do_hexdump (FILE *out_file, char *buf, int blocksize)
914 {
915 int i,j;
916 int *intp;
917 char *charp;
918 unsigned char c;
919
920 intp = (int *) buf;
921 charp = (char *) buf;
922
923 for (i=0; i<blocksize; i+=16) {
924 fprintf(out_file, " %04x: ", i);
925 for (j=0; j<16; j+=4)
926 fprintf(out_file, "%08x ", *intp++);
927 for (j=0; j<16; j++) {
928 c = *charp++;
929 if (c < ' ' || c >= 127)
930 c = '.';
931 fprintf(out_file, "%c", c);
932 }
933 fprintf(out_file, "\n");
934 }
935 }
936
Ext 2/3/4 filesystem utilities