Use only ctime to compare newness (instead of both ctime and mtime)
[dump.git] / dump / traverse.c
1 /*
2 * Ported to Linux's Second Extended File System as part of the
3 * dump and restore backup suit
4 * Remy Card <card@Linux.EU.Org>, 1994-1997
5 * Stelian Pop <stelian@popies.net>, 1999-2000
6 * Stelian Pop <stelian@popies.net> - AlcĂ´ve <www.alcove.com>, 2000-2002
7 */
8
9 /*-
10 * Copyright (c) 1980, 1988, 1991, 1993
11 * The Regents of the University of California. All rights reserved.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 */
37
38 #ifndef lint
39 static const char rcsid[] =
40 "$Id: traverse.c,v 1.71 2010/06/10 12:17:35 stelian Exp $";
41 #endif /* not lint */
42
43 #include <config.h>
44 #include <ctype.h>
45 #include <stdio.h>
46 #include <sys/types.h>
47 #ifdef __STDC__
48 #include <string.h>
49 #include <unistd.h>
50 #endif
51 #include <errno.h>
52
53 #include <sys/param.h>
54 #include <sys/stat.h>
55 #ifdef __linux__
56 #ifdef HAVE_EXT2FS_EXT2_FS_H
57 #include <ext2fs/ext2_fs.h>
58 #else
59 #include <linux/ext2_fs.h>
60 #endif
61 #include <ext2fs/ext2fs.h>
62 #include <bsdcompat.h>
63 #include <compaterr.h>
64 #include <stdlib.h>
65 #elif defined sunos
66 #include <sys/vnode.h>
67
68 #include <ufs/fs.h>
69 #include <ufs/fsdir.h>
70 #include <ufs/inode.h>
71 #else
72 #include <ufs/ufs/dir.h>
73 #include <ufs/ufs/dinode.h>
74 #include <ufs/ffs/fs.h>
75 #endif /* __linux__ */
76
77 #include <protocols/dumprestore.h>
78
79 #include "dump.h"
80
81 #define HASDUMPEDFILE 0x1
82 #define HASSUBDIRS 0x2
83
84 #ifdef __linux__
85 typedef u_quad_t fsizeT;
86 #else
87 #ifdef FS_44INODEFMT
88 typedef quad_t fsizeT;
89 #else
90 typedef long fsizeT;
91 #endif
92 #endif
93
94 #ifdef __linux__
95 static int searchdir __P((struct ext2_dir_entry *dp, int offset,
96 int blocksize, char *buf, void *private));
97 #else
98 static int dirindir __P((dump_ino_t ino, daddr_t blkno, int level, long *size));
99 static void dmpindir __P((dump_ino_t ino, daddr_t blk, int level, fsizeT *size));
100 static int searchdir __P((dump_ino_t ino, daddr_t blkno, long size, long filesize));
101 #endif
102 static void mapfileino __P((dump_ino_t ino, struct dinode const *dp, long long *tapesize, int *dirskipped));
103 static void dump_xattr __P((dump_ino_t ino, struct dinode *dp));
104
105 #ifdef HAVE_EXT2_JOURNAL_INUM
106 #define ext2_journal_ino(sb) (sb->s_journal_inum)
107 #else
108 #define ext2_journal_ino(sb) (*((u_int32_t *)sb + 0x38))
109 #endif
110 #ifndef HAVE_EXT2_INO_T
111 typedef ino_t ext2_ino_t;
112 #endif
113
114 #ifndef EXT3_FEATURE_COMPAT_HAS_JOURNAL
115 #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
116 #endif
117 #ifndef EXT2_FEATURE_INCOMPAT_FILETYPE
118 #define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002
119 #endif
120 #ifndef EXT3_FEATURE_INCOMPAT_RECOVER
121 #define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004
122 #endif
123 #ifndef EXT3_FEATURE_INCOMPAT_JOURNAL_DEV
124 #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008
125 #endif
126
127 #ifndef EXT2_LIB_FEATURE_INCOMPAT_SUPP
128 #define EXT2_LIB_FEATURE_INCOMPAT_SUPP (EXT3_FEATURE_INCOMPAT_RECOVER | \
129 EXT2_FEATURE_INCOMPAT_FILETYPE)
130 #endif
131 #ifndef EXT2_RESIZE_INO
132 #define EXT2_RESIZE_INO 7
133 #endif
134 #ifndef EXT2_FT_UNKNOWN
135 #define EXT2_FT_UNKNOWN 0
136 #define EXT2_FT_REG_FILE 1
137 #define EXT2_FT_DIR 2
138 #define EXT2_FT_CHRDEV 3
139 #define EXT2_FT_BLKDEV 4
140 #define EXT2_FT_FIFO 5
141 #define EXT2_FT_SOCK 6
142 #define EXT2_FT_SYMLINK 7
143 #define EXT2_FT_MAX 8
144 #endif
145
146 int dump_fs_open(const char *disk, ext2_filsys *fs)
147 {
148 int retval;
149
150 retval = ext2fs_open(disk, EXT2_FLAG_FORCE, 0, 0, unix_io_manager, fs);
151 if (!retval) {
152 struct ext2_super_block *es = (*fs)->super;
153 dump_ino_t journal_ino = ext2_journal_ino(es);
154
155 if (es->s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV){
156 msg("This is a journal, not a filesystem!\n");
157 retval = EXT2_ET_UNSUPP_FEATURE;
158 ext2fs_close(*fs);
159 }
160 else if ((retval = es->s_feature_incompat &
161 ~(EXT2_LIB_FEATURE_INCOMPAT_SUPP |
162 EXT3_FEATURE_INCOMPAT_RECOVER))) {
163 msg("Unsupported feature(s) 0x%x in filesystem\n",
164 retval);
165 retval = EXT2_ET_UNSUPP_FEATURE;
166 ext2fs_close(*fs);
167 }
168 else {
169 if (es->s_feature_compat &
170 EXT3_FEATURE_COMPAT_HAS_JOURNAL &&
171 journal_ino)
172 do_exclude_ino(journal_ino, "journal inode");
173 do_exclude_ino(EXT2_RESIZE_INO, "resize inode");
174 }
175 }
176 return retval;
177 }
178
179 /*
180 * This is an estimation of the number of TP_BSIZE blocks in the file.
181 * It estimates the number of blocks in files with holes by assuming
182 * that all of the blocks accounted for by di_blocks are data blocks
183 * (when some of the blocks are usually used for indirect pointers);
184 * hence the estimate may be high.
185 */
186 long
187 blockest(struct dinode const *dp)
188 {
189 long blkest, sizeest;
190 u_quad_t i_size;
191
192 /*
193 * dp->di_size is the size of the file in bytes.
194 * dp->di_blocks stores the number of sectors actually in the file.
195 * If there are more sectors than the size would indicate, this just
196 * means that there are indirect blocks in the file or unused
197 * sectors in the last file block; we can safely ignore these
198 * (blkest = sizeest below).
199 * If the file is bigger than the number of sectors would indicate,
200 * then the file has holes in it. In this case we must use the
201 * block count to estimate the number of data blocks used, but
202 * we use the actual size for estimating the number of indirect
203 * dump blocks (sizeest vs. blkest in the indirect block
204 * calculation).
205 */
206 blkest = howmany((u_quad_t)dp->di_blocks * 512, fs->blocksize) * (fs->blocksize / TP_BSIZE);
207 i_size = dp->di_size + ((u_quad_t) dp->di_size_high << 32);
208 sizeest = howmany(i_size, fs->blocksize) * (fs->blocksize / TP_BSIZE);
209 if (blkest > sizeest)
210 blkest = sizeest;
211 #ifdef __linux__
212 if ((dp->di_mode & IFMT) == IFDIR) {
213 /*
214 * for directories, assume only half of space is filled
215 * with entries.
216 */
217 blkest = blkest / 2;
218 sizeest = sizeest / 2;
219 }
220 if (i_size > (u_quad_t)fs->blocksize * NDADDR) {
221 /* calculate the number of indirect blocks on the dump tape */
222 blkest +=
223 howmany(sizeest - NDADDR * fs->blocksize / TP_BSIZE,
224 TP_NINDIR);
225 }
226 #else
227 if (i_size > sblock->fs_bsize * NDADDR) {
228 /* calculate the number of indirect blocks on the dump tape */
229 blkest +=
230 howmany(sizeest - NDADDR * sblock->fs_bsize / TP_BSIZE,
231 TP_NINDIR);
232 }
233 #endif
234 return (blkest + 1);
235 }
236
237 /* Auxiliary macro to pick up files changed since previous dump. */
238 #define CSINCE(dp, t) \
239 ((dp)->di_ctime >= (t))
240 #define MSINCE(dp, t) \
241 ((dp)->di_mtime >= (t))
242 #define CHANGEDSINCE(dp, t) \
243 CSINCE(dp, t)
244
245 /* The NODUMP_FLAG macro tests if a file has the nodump flag. */
246 #ifdef UF_NODUMP
247 #define NODUMP_FLAG(dp) (!nonodump && (((dp)->di_flags & UF_NODUMP) == UF_NODUMP))
248 #else
249 #define NODUMP_FLAG(dp) 0
250 #endif
251
252 /* The WANTTODUMP macro decides whether a file should be dumped. */
253 #define WANTTODUMP(dp, ino) \
254 (CHANGEDSINCE(dp, ((u_int32_t)spcl.c_ddate)) && \
255 (!NODUMP_FLAG(dp)) && \
256 (!exclude_ino(ino)))
257
258 /*
259 * Determine if given inode should be dumped. "dp" must either point to a
260 * copy of the given inode, or be NULL (in which case it is fetched.)
261 */
262 static void
263 mapfileino(dump_ino_t ino, struct dinode const *dp, long long *tapesize, int *dirskipped)
264 {
265 int mode;
266
267 /*
268 * Skip inode if we've already marked it for dumping
269 */
270 if (TSTINO(ino, usedinomap))
271 return;
272 if (!dp)
273 dp = getino(ino);
274 if ((mode = (dp->di_mode & IFMT)) == 0)
275 return;
276 #ifdef __linux__
277 if (dp->di_nlink == 0 || dp->di_dtime != 0)
278 return;
279 #endif
280 /*
281 * Put all dirs in dumpdirmap, inodes that are to be dumped in the
282 * used map. All inode but dirs who have the nodump attribute go
283 * to the usedinomap.
284 */
285 SETINO(ino, usedinomap);
286
287 if (NODUMP_FLAG(dp))
288 do_exclude_ino(ino, "nodump attribute");
289
290 if (mode == IFDIR)
291 SETINO(ino, dumpdirmap);
292 if (WANTTODUMP(dp, ino)) {
293 SETINO(ino, dumpinomap);
294 if (!MSINCE(dp, (u_int32_t)spcl.c_ddate))
295 SETINO(ino, metainomap);
296 if (mode != IFREG && mode != IFDIR && mode != IFLNK)
297 *tapesize += 1;
298 else
299 *tapesize += blockest(dp);
300 return;
301 }
302 if (mode == IFDIR) {
303 if (exclude_ino(ino))
304 CLRINO(ino, usedinomap);
305 *dirskipped = 1;
306 }
307 }
308
309 /*
310 * Dump pass 1.
311 *
312 * Walk the inode list for a filesystem to find all allocated inodes
313 * that have been modified since the previous dump time. Also, find all
314 * the directories in the filesystem.
315 */
316 #ifdef __linux__
317 int
318 mapfiles(UNUSED(dump_ino_t maxino), long long *tapesize)
319 {
320 ext2_ino_t ino;
321 int anydirskipped = 0;
322 ext2_inode_scan scan;
323 errcode_t err;
324 struct ext2_inode inode;
325
326 /*
327 * We use libext2fs's inode scanning routines, which are particularly
328 * robust. (Note that getino cannot return an error.)
329 */
330 err = ext2fs_open_inode_scan(fs, 0, &scan);
331 if (err) {
332 com_err(disk, err, "while opening inodes\n");
333 exit(X_ABORT);
334 }
335 for (;;) {
336 err = ext2fs_get_next_inode(scan, &ino, &inode);
337 if (err == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE)
338 continue;
339 if (err) {
340 com_err(disk, err, "while scanning inode #%ld\n",
341 (long)ino);
342 exit(X_ABORT);
343 }
344 if (ino == 0)
345 break;
346
347 curino = ino;
348 mapfileino(ino, (struct dinode const *)&inode, tapesize,
349 &anydirskipped);
350 }
351 ext2fs_close_inode_scan(scan);
352
353 /*
354 * Restore gets very upset if the root is not dumped,
355 * so ensure that it always is dumped.
356 */
357 SETINO(ROOTINO, dumpinomap);
358 return (anydirskipped);
359 }
360 #else
361 int
362 mapfiles(dump_ino_t maxino, long long *tapesize)
363 {
364 dump_ino_t ino;
365 int anydirskipped = 0;
366
367 for (ino = ROOTINO; ino < maxino; ino++)
368 mapfileino(ino, tapesize, &anydirskipped);
369
370 /*
371 * Restore gets very upset if the root is not dumped,
372 * so ensure that it always is dumped.
373 */
374 SETINO(ROOTINO, dumpinomap);
375 return (anydirskipped);
376 }
377 #endif /* __linux__ */
378
379 #ifdef __linux__
380 int
381 maponefile(UNUSED(dump_ino_t maxino), long long *tapesize, char *directory)
382 {
383 errcode_t retval;
384 ext2_ino_t dir_ino;
385 char dir_name [MAXPATHLEN];
386 int i, anydirskipped = 0;
387
388 /*
389 * Mark every directory in the path as being dumped
390 */
391 for (i = 0; i < (int)strlen (directory); i++) {
392 if (directory[i] == '/') {
393 strncpy (dir_name, directory, i);
394 dir_name[i] = '\0';
395 retval = ext2fs_namei(fs, ROOTINO, ROOTINO,
396 dir_name, &dir_ino);
397 if (retval) {
398 com_err(disk, retval,
399 "while translating %s", dir_name);
400 exit(X_ABORT);
401 }
402 mapfileino((dump_ino_t) dir_ino, 0,
403 tapesize, &anydirskipped);
404 }
405 }
406 /*
407 * Mark the final directory
408 */
409 retval = ext2fs_namei(fs, ROOTINO, ROOTINO, directory, &dir_ino);
410 if (retval) {
411 com_err(disk, retval, "while translating %s", directory);
412 exit(X_ABORT);
413 }
414 mapfileino((dump_ino_t)dir_ino, 0, tapesize, &anydirskipped);
415
416 mapfileino(ROOTINO, 0, tapesize, &anydirskipped);
417
418 /*
419 * Restore gets very upset if the root is not dumped,
420 * so ensure that it always is dumped.
421 */
422 SETINO(ROOTINO, dumpdirmap);
423 return anydirskipped;
424 }
425 #endif /* __linux__ */
426
427 #ifdef __linux__
428 struct mapfile_context {
429 long long *tapesize;
430 int *anydirskipped;
431 };
432
433 static int
434 mapfilesindir(struct ext2_dir_entry *dirent, UNUSED(int offset),
435 UNUSED(int blocksize), UNUSED(char *buf), void *private)
436 {
437 struct dinode const *dp;
438 int mode;
439 errcode_t retval;
440 struct mapfile_context *mfc;
441 ext2_ino_t ino;
442
443 ino = dirent->inode;
444 mfc = (struct mapfile_context *)private;
445 dp = getino(dirent->inode);
446
447 mapfileino(dirent->inode, dp, mfc->tapesize, mfc->anydirskipped);
448
449 mode = dp->di_mode & IFMT;
450 if (mode == IFDIR && dp->di_nlink != 0 && dp->di_dtime == 0) {
451 if ((dirent->name[0] != '.' || ( dirent->name_len & 0xFF ) != 1) &&
452 (dirent->name[0] != '.' || dirent->name[1] != '.' ||
453 ( dirent->name_len & 0xFF ) != 2)) {
454 retval = ext2fs_dir_iterate(fs, ino, 0, NULL,
455 mapfilesindir, private);
456 if (retval)
457 return retval;
458 }
459 }
460 return 0;
461 }
462
463 /*
464 * Dump pass 1.
465 *
466 * Walk the inode list for a filesystem to find all allocated inodes
467 * that have been modified since the previous dump time. Also, find all
468 * the directories in the filesystem.
469 */
470 int
471 mapfilesfromdir(UNUSED(dump_ino_t maxino), long long *tapesize, char *directory)
472 {
473 errcode_t retval;
474 struct mapfile_context mfc;
475 ext2_ino_t dir_ino;
476 char dir_name [MAXPATHLEN];
477 int i, anydirskipped = 0;
478
479 /*
480 * Mark every directory in the path as being dumped
481 */
482 for (i = 0; i < (int)strlen (directory); i++) {
483 if (directory[i] == '/') {
484 strncpy (dir_name, directory, i);
485 dir_name[i] = '\0';
486 retval = ext2fs_namei(fs, ROOTINO, ROOTINO, dir_name,
487 &dir_ino);
488 if (retval) {
489 com_err(disk, retval, "while translating %s",
490 dir_name);
491 exit(X_ABORT);
492 }
493 mapfileino(dir_ino, 0, tapesize, &anydirskipped);
494 }
495 }
496 /*
497 * Mark the final directory
498 */
499 retval = ext2fs_namei(fs, ROOTINO, ROOTINO, directory, &dir_ino);
500 if (retval) {
501 com_err(disk, retval, "while translating %s", directory);
502 exit(X_ABORT);
503 }
504 mapfileino(dir_ino, 0, tapesize, &anydirskipped);
505
506 mfc.tapesize = tapesize;
507 mfc.anydirskipped = &anydirskipped;
508 retval = ext2fs_dir_iterate(fs, dir_ino, 0, NULL, mapfilesindir,
509 (void *)&mfc);
510
511 if (retval) {
512 com_err(disk, retval, "while mapping files in %s", directory);
513 exit(X_ABORT);
514 }
515 /*
516 * Ensure that the root inode actually appears in the file list
517 * for a subdir
518 */
519 mapfileino(ROOTINO, 0, tapesize, &anydirskipped);
520 /*
521 * Restore gets very upset if the root is not dumped,
522 * so ensure that it always is dumped.
523 */
524 SETINO(ROOTINO, dumpinomap);
525 return anydirskipped;
526 }
527 #endif
528
529 #ifdef __linux__
530 struct mapdirs_context {
531 int *ret;
532 int nodump;
533 long long *tapesize;
534 };
535 #endif
536
537 /*
538 * Dump pass 2.
539 *
540 * Scan each directory on the filesystem to see if it has any modified
541 * files in it. If it does, and has not already been added to the dump
542 * list (because it was itself modified), then add it. If a directory
543 * has not been modified itself, contains no modified files and has no
544 * subdirectories, then it can be deleted from the dump list and from
545 * the list of directories. By deleting it from the list of directories,
546 * its parent may now qualify for the same treatment on this or a later
547 * pass using this algorithm.
548 */
549 int
550 mapdirs(dump_ino_t maxino, long long *tapesize)
551 {
552 struct dinode *dp;
553 int isdir;
554 char *map;
555 dump_ino_t ino;
556 #ifndef __linux__
557 int i;
558 long filesize;
559 #else
560 struct mapdirs_context mdc;
561 #endif
562 int ret, change = 0, nodump;
563
564 isdir = 0; /* XXX just to get gcc to shut up */
565 for (map = dumpdirmap, ino = 1; ino < maxino; ino++) {
566 if (((ino - 1) % NBBY) == 0) /* map is offset by 1 */
567 isdir = *map++;
568 else
569 isdir >>= 1;
570 /*
571 * If dir has been removed from the used map, it's either
572 * because it had the nodump flag, or it herited it from
573 * its parent. A directory can't be in dumpinomap if not
574 * in usedinomap, but we have to go through it anyway
575 * to propagate the nodump attribute.
576 */
577 if ((isdir & 1) == 0)
578 continue;
579 nodump = (TSTINO(ino, usedinomap) == 0);
580 if (TSTINO(ino, dumpinomap) && nodump == 0)
581 continue;
582 dp = getino(ino);
583 #ifdef __linux__
584 ret = 0;
585 mdc.ret = &ret;
586 mdc.nodump = nodump;
587 mdc.tapesize = tapesize;
588 ext2fs_dir_iterate(fs, ino, 0, NULL, searchdir, (void *) &mdc);
589 #else /* __linux__ */
590 filesize = dp->di_size;
591 for (ret = 0, i = 0; filesize > 0 && i < NDADDR; i++) {
592 if (dp->di_db[i] != 0)
593 ret |= searchdir(ino, dp->di_db[i],
594 (long)dblksize(sblock, dp, i),
595 filesize);
596 if (ret & HASDUMPEDFILE)
597 filesize = 0;
598 else
599 filesize -= sblock->fs_bsize;
600 }
601 for (i = 0; filesize > 0 && i < NIADDR; i++) {
602 if (dp->di_ib[i] == 0)
603 continue;
604 ret |= dirindir(ino, dp->di_ib[i], i, &filesize);
605 }
606 #endif /* __linux__ */
607 if (ret & HASDUMPEDFILE) {
608 SETINO(ino, dumpinomap);
609 *tapesize += blockest(dp);
610 change = 1;
611 continue;
612 }
613 if (nodump) {
614 if (ret & HASSUBDIRS)
615 change = 1; /* subdirs have inherited nodump */
616 CLRINO(ino, dumpdirmap);
617 } else if ((ret & HASSUBDIRS) == 0) {
618 if (!TSTINO(ino, dumpinomap)) {
619 CLRINO(ino, dumpdirmap);
620 change = 1;
621 }
622 }
623 }
624 return (change);
625 }
626
627 #ifndef __linux__
628 /*
629 * Read indirect blocks, and pass the data blocks to be searched
630 * as directories. Quit as soon as any entry is found that will
631 * require the directory to be dumped.
632 */
633 static int
634 dirindir(dump_ino_t ino, daddr_t blkno, int ind_level, long *filesize)
635 {
636 int ret = 0;
637 int i;
638 daddr_t idblk[MAXNINDIR];
639
640 bread(fsbtodb(sblock, blkno), (char *)idblk, (int)sblock->fs_bsize);
641 if (ind_level <= 0) {
642 for (i = 0; *filesize > 0 && i < NINDIR(sblock); i++) {
643 blkno = idblk[i];
644 if (blkno != 0)
645 ret |= searchdir(ino, blkno, sblock->fs_bsize,
646 *filesize);
647 if (ret & HASDUMPEDFILE)
648 *filesize = 0;
649 else
650 *filesize -= sblock->fs_bsize;
651 }
652 return (ret);
653 }
654 ind_level--;
655 for (i = 0; *filesize > 0 && i < NINDIR(sblock); i++) {
656 blkno = idblk[i];
657 if (blkno != 0)
658 ret |= dirindir(ino, blkno, ind_level, filesize);
659 }
660 return (ret);
661 }
662 #endif /* !__linux__ */
663
664 /*
665 * Scan a disk block containing directory information looking to see if
666 * any of the entries are on the dump list and to see if the directory
667 * contains any subdirectories.
668 */
669 #ifdef __linux__
670 static int
671 searchdir(struct ext2_dir_entry *dp, UNUSED(int offset),
672 UNUSED(int blocksize), UNUSED(char *buf), void *private)
673 {
674 struct mapdirs_context *mdc;
675 int *ret;
676 long long *tapesize;
677 struct dinode *ip;
678
679 mdc = (struct mapdirs_context *)private;
680 ret = mdc->ret;
681 tapesize = mdc->tapesize;
682
683 if (dp->inode == 0)
684 return 0;
685 if (dp->name[0] == '.') {
686 if (( dp->name_len & 0xFF ) == 1)
687 return 0;
688 if (dp->name[1] == '.' && ( dp->name_len & 0xFF ) == 2)
689 return 0;
690 }
691 if (mdc->nodump) {
692 ip = getino(dp->inode);
693 if (TSTINO(dp->inode, dumpinomap)) {
694 CLRINO(dp->inode, dumpinomap);
695 *tapesize -= blockest(ip);
696 }
697 /* Add dir back to the dir map and remove from
698 * usedinomap to propagate nodump */
699 if ((ip->di_mode & IFMT) == IFDIR) {
700 SETINO(dp->inode, dumpdirmap);
701 CLRINO(dp->inode, usedinomap);
702 *ret |= HASSUBDIRS;
703 }
704 } else {
705 if (TSTINO(dp->inode, dumpinomap)) {
706 *ret |= HASDUMPEDFILE;
707 if (*ret & HASSUBDIRS)
708 return DIRENT_ABORT;
709 }
710 if (TSTINO(dp->inode, dumpdirmap)) {
711 *ret |= HASSUBDIRS;
712 if (*ret & HASDUMPEDFILE)
713 return DIRENT_ABORT;
714 }
715 }
716 return 0;
717 }
718
719 #else /* __linux__ */
720
721 static int
722 searchdir(dump_ino_t ino, daddr_t blkno, long size, long filesize)
723 {
724 struct direct *dp;
725 long loc, ret = 0;
726 char dblk[MAXBSIZE];
727
728 bread(fsbtodb(sblock, blkno), dblk, (int)size);
729 if (filesize < size)
730 size = filesize;
731 for (loc = 0; loc < size; ) {
732 dp = (struct direct *)(dblk + loc);
733 if (dp->d_reclen == 0) {
734 msg("corrupted directory, inumber %d\n", ino);
735 break;
736 }
737 loc += dp->d_reclen;
738 if (dp->d_ino == 0)
739 continue;
740 if (dp->d_name[0] == '.') {
741 if (dp->d_name[1] == '\0')
742 continue;
743 if (dp->d_name[1] == '.' && dp->d_name[2] == '\0')
744 continue;
745 }
746 if (TSTINO(dp->d_ino, dumpinomap)) {
747 ret |= HASDUMPEDFILE;
748 if (ret & HASSUBDIRS)
749 break;
750 }
751 if (TSTINO(dp->d_ino, dumpdirmap)) {
752 ret |= HASSUBDIRS;
753 if (ret & HASDUMPEDFILE)
754 break;
755 }
756 }
757 return (ret);
758 }
759 #endif /* __linux__ */
760
761 #ifdef __linux__
762
763 struct block_context {
764 ext2_ino_t ino;
765 int *buf;
766 int cnt;
767 int max;
768 int next_block;
769 };
770
771 /*
772 * Dump a block to the tape
773 */
774 static int
775 dumponeblock(UNUSED(ext2_filsys fs), blk_t *blocknr, e2_blkcnt_t blockcnt,
776 UNUSED(blk_t ref_block), UNUSED(int ref_offset), void * private)
777 {
778 struct block_context *p;
779 e2_blkcnt_t i;
780
781 p = (struct block_context *)private;
782 for (i = p->next_block; i < blockcnt; i++) {
783 p->buf[p->cnt++] = 0;
784 if (p->cnt == p->max) {
785 blksout (p->buf, p->cnt, p->ino);
786 p->cnt = 0;
787 }
788 }
789 p->buf[p->cnt++] = *blocknr;
790 if (p->cnt == p->max) {
791 blksout (p->buf, p->cnt, p->ino);
792 p->cnt = 0;
793 }
794 p->next_block = blockcnt + 1;
795 return 0;
796 }
797 #endif
798
799 static void
800 dump_xattr(dump_ino_t ino, struct dinode *dp) {
801
802 if (dp->di_extraisize != 0) {
803 #ifdef HAVE_EXT2FS_READ_INODE_FULL
804 char inode[EXT2_INODE_SIZE(fs->super)];
805 errcode_t err;
806 u_int32_t *magic;
807
808 memset(inode, 0, EXT2_INODE_SIZE(fs->super));
809 err = ext2fs_read_inode_full(fs, (ext2_ino_t)ino,
810 (struct ext2_inode *) inode,
811 EXT2_INODE_SIZE(fs->super));
812 if (err) {
813 com_err(disk, err, "while reading inode #%ld\n", (long)ino);
814 exit(X_ABORT);
815 }
816
817 magic = (void *)inode + EXT2_GOOD_OLD_INODE_SIZE + dp->di_extraisize;
818 if (*magic == EXT2_XATTR_MAGIC) {
819 char xattr[EXT2_INODE_SIZE(fs->super)];
820 int i;
821 char *cp;
822
823 if (vflag)
824 msg("dumping EA (inode) in inode #%ld\n", (long)ino);
825 memset(xattr, 0, EXT2_INODE_SIZE(fs->super));
826 memcpy(xattr, (void *)magic,
827 EXT2_INODE_SIZE(fs->super) -
828 (EXT2_GOOD_OLD_INODE_SIZE + dp->di_extraisize));
829 magic = (u_int32_t *)xattr;
830 *magic = EXT2_XATTR_MAGIC2;
831
832 spcl.c_type = TS_INODE;
833 spcl.c_dinode.di_size = EXT2_INODE_SIZE(fs->super);
834 spcl.c_flags |= DR_EXTATTRIBUTES;
835 spcl.c_extattributes = EXT_XATTR;
836 spcl.c_count = howmany(EXT2_INODE_SIZE(fs->super), TP_BSIZE);
837 for (i = 0; i < spcl.c_count; i++)
838 spcl.c_addr[i] = 1;
839 writeheader(ino);
840 for (i = 0, cp = xattr; i < spcl.c_count; i++, cp += TP_BSIZE)
841 writerec(cp, 0);
842 spcl.c_flags &= ~DR_EXTATTRIBUTES;
843 spcl.c_extattributes = 0;
844 }
845 #endif
846 }
847
848 if (dp->di_file_acl) {
849
850 if (vflag)
851 msg("dumping EA (block) in inode #%ld\n", (long)ino);
852
853 spcl.c_type = TS_INODE;
854 spcl.c_dinode.di_size = sblock->fs_bsize;
855 spcl.c_flags |= DR_EXTATTRIBUTES;
856 spcl.c_extattributes = EXT_XATTR;
857 blksout(&dp->di_file_acl, EXT2_FRAGS_PER_BLOCK(fs->super), ino);
858 spcl.c_flags &= ~DR_EXTATTRIBUTES;
859 spcl.c_extattributes = 0;
860 }
861 }
862
863 /*
864 * Dump passes 3 and 4.
865 *
866 * Dump the contents of an inode to tape.
867 */
868 void
869 dumpino(struct dinode *dp, dump_ino_t ino, int metaonly)
870 {
871 unsigned long cnt;
872 fsizeT size, remaining;
873 char buf[TP_BSIZE];
874 struct new_bsd_inode nbi;
875 int i;
876 #ifdef __linux__
877 struct block_context bc;
878 #else
879 int ind_level;
880 #endif
881 u_quad_t i_size;
882
883 if (metaonly)
884 i_size = 0;
885 else
886 i_size = dp->di_size + ((u_quad_t) dp->di_size_high << 32);
887
888 if (newtape) {
889 newtape = 0;
890 dumpmap(dumpinomap, TS_BITS, ino);
891 }
892 CLRINO(ino, dumpinomap);
893 #ifdef __linux__
894 memset(&nbi, 0, sizeof(nbi));
895 nbi.di_mode = dp->di_mode;
896 nbi.di_nlink = dp->di_nlink;
897 nbi.di_ouid = dp->di_uid;
898 nbi.di_ogid = dp->di_gid;
899 nbi.di_size = i_size;
900 nbi.di_atime.tv_sec = dp->di_atime;
901 nbi.di_mtime.tv_sec = dp->di_mtime;
902 nbi.di_ctime.tv_sec = dp->di_ctime;
903 memmove(&nbi.di_db, &dp->di_db, (NDADDR + NIADDR) * sizeof(daddr_t));
904 nbi.di_flags = dp->di_flags;
905 nbi.di_blocks = dp->di_blocks;
906 nbi.di_gen = dp->di_gen;
907 nbi.di_uid = (((int32_t)dp->di_uidhigh) << 16) | dp->di_uid;
908 nbi.di_gid = (((int32_t)dp->di_gidhigh) << 16) | dp->di_gid;
909 memmove(&spcl.c_dinode, &nbi, sizeof(nbi));
910 #else /* __linux__ */
911 spcl.c_dinode = *dp;
912 #endif /* __linux__ */
913 spcl.c_type = TS_INODE;
914 spcl.c_count = 0;
915
916 if (metaonly && (dp->di_mode & S_IFMT)) {
917 spcl.c_flags |= DR_METAONLY;
918 spcl.c_count = 0;
919 writeheader(ino);
920 spcl.c_flags &= ~DR_METAONLY;
921 dump_xattr(ino, dp);
922 return;
923 }
924
925 switch (dp->di_mode & S_IFMT) {
926
927 case 0:
928 /*
929 * Freed inode.
930 */
931 return;
932
933 #ifdef __linux__
934 case S_IFDIR:
935 msg("Warning: dumpino called on a directory (ino %d)\n", ino);
936 return;
937 #endif
938
939 case S_IFLNK:
940 /*
941 * Check for short symbolic link.
942 */
943 #ifdef __linux__
944 if (i_size > 0 &&
945 i_size < EXT2_N_BLOCKS * sizeof (daddr_t)) {
946 spcl.c_addr[0] = 1;
947 spcl.c_count = 1;
948 writeheader(ino);
949 memmove(buf, dp->di_db, (u_long)dp->di_size);
950 buf[dp->di_size] = '\0';
951 writerec(buf, 0);
952 dump_xattr(ino, dp);
953 return;
954 }
955 #endif /* __linux__ */
956 #ifdef FS_44INODEFMT
957 if (dp->di_size > 0 &&
958 dp->di_size < sblock->fs_maxsymlinklen) {
959 spcl.c_addr[0] = 1;
960 spcl.c_count = 1;
961 writeheader(ino);
962 memmove(buf, dp->di_shortlink, (u_long)dp->di_size);
963 buf[dp->di_size] = '\0';
964 writerec(buf, 0);
965 return;
966 }
967 #endif
968 /* fall through */
969
970 #ifndef __linux__
971 case S_IFDIR:
972 #endif
973 case S_IFREG:
974 if (i_size)
975 break;
976 /* fall through */
977
978 case S_IFIFO:
979 case S_IFSOCK:
980 case S_IFCHR:
981 case S_IFBLK:
982 writeheader(ino);
983 dump_xattr(ino, dp);
984 return;
985
986 default:
987 msg("Warning: undefined file type 0%o\n", dp->di_mode & IFMT);
988 return;
989 }
990 #ifdef __linux__
991 bc.max = NINDIR(sblock) * EXT2_FRAGS_PER_BLOCK(fs->super);
992 bc.buf = (int *)malloc (bc.max * sizeof (int));
993 bc.cnt = 0;
994 bc.ino = ino;
995 bc.next_block = NDADDR;
996
997 ext2fs_block_iterate2(fs, (ext2_ino_t)ino, BLOCK_FLAG_DATA_ONLY, NULL, dumponeblock, (void *)&bc);
998 /* deal with holes at the end of the inode */
999 if (i_size > ((u_quad_t)bc.next_block) * sblock->fs_fsize) {
1000 remaining = i_size - ((u_quad_t)bc.next_block) * sblock->fs_fsize;
1001 for (i = 0; i < (int)howmany(remaining, sblock->fs_fsize); i++) {
1002 bc.buf[bc.cnt++] = 0;
1003 if (bc.cnt == bc.max) {
1004 blksout (bc.buf, bc.cnt, bc.ino);
1005 bc.cnt = 0;
1006 }
1007 }
1008 }
1009 if (bc.cnt > 0) {
1010 blksout (bc.buf, bc.cnt, bc.ino);
1011 }
1012 free(bc.buf);
1013 dump_xattr(ino, dp);
1014 #else
1015 if (i_size > (u_quad_t)NDADDR * sblock->fs_bsize)
1016 cnt = NDADDR * sblock->fs_frag;
1017 else
1018 cnt = howmany(i_size, sblock->fs_fsize);
1019 blksout(&dp->di_db[0], cnt, ino);
1020 if ((quad_t) (size = i_size - NDADDR * sblock->fs_bsize) <= 0) {
1021 dump_xattr(ino, dp);
1022 return;
1023 }
1024 for (ind_level = 0; ind_level < NIADDR; ind_level++) {
1025 dmpindir(ino, dp->di_ib[ind_level], ind_level, &size);
1026 if (size <= 0)
1027 return;
1028 }
1029 #endif
1030 }
1031
1032 #ifdef __linux__
1033
1034 struct convert_dir_context {
1035 char *buf;
1036 int prev_offset;
1037 int offset;
1038 int bs;
1039 };
1040
1041 /*
1042 * This function converts an ext2fs directory entry to the BSD format.
1043 *
1044 * Basically, it adds a null-character at the end of the name, recomputes the
1045 * size of the entry, and creates it in a temporary buffer
1046 */
1047 static int
1048 convert_dir(struct ext2_dir_entry *dirent, UNUSED(int offset),
1049 UNUSED(int blocksize), UNUSED(char *buf), void *private)
1050 {
1051 struct convert_dir_context *p;
1052 struct direct *dp;
1053 int reclen;
1054
1055 /* do not save entries to excluded inodes */
1056 if (exclude_ino(dirent->inode))
1057 return 0;
1058
1059 p = (struct convert_dir_context *)private;
1060
1061 reclen = EXT2_DIR_REC_LEN((dirent->name_len & 0xFF) + 1);
1062 if (((p->offset + reclen - 1) / p->bs) != (p->offset / p->bs)) {
1063 dp = (struct direct *)(p->buf + p->prev_offset);
1064 dp->d_reclen += p->bs - (p->offset % p->bs);
1065 p->offset += p->bs - (p->offset % p->bs);
1066 }
1067
1068 dp = (struct direct *)(p->buf + p->offset);
1069 dp->d_ino = dirent->inode;
1070 dp->d_reclen = reclen;
1071 dp->d_namlen = dirent->name_len & 0xFF;
1072 switch ((dirent->name_len & 0xFF00) >> 8) {
1073 default:
1074 dp->d_type = DT_UNKNOWN;
1075 break;
1076 case EXT2_FT_REG_FILE:
1077 dp->d_type = DT_REG;
1078 break;
1079 case EXT2_FT_DIR:
1080 dp->d_type = DT_DIR;
1081 break;
1082 case EXT2_FT_CHRDEV:
1083 dp->d_type = DT_CHR;
1084 break;
1085 case EXT2_FT_BLKDEV:
1086 dp->d_type = DT_BLK;
1087 break;
1088 case EXT2_FT_FIFO:
1089 dp->d_type = DT_FIFO;
1090 break;
1091 case EXT2_FT_SOCK:
1092 dp->d_type = DT_SOCK;
1093 break;
1094 case EXT2_FT_SYMLINK:
1095 dp->d_type = DT_LNK;
1096 break;
1097 }
1098 strncpy(dp->d_name, dirent->name, dp->d_namlen);
1099 dp->d_name[dp->d_namlen] = '\0';
1100 p->prev_offset = p->offset;
1101 p->offset += reclen;
1102
1103 return 0;
1104 }
1105
1106 /*
1107 * Dump pass 3
1108 *
1109 * Dumps a directory to tape after converting it to the BSD format
1110 */
1111 void
1112 dumpdirino(struct dinode *dp, dump_ino_t ino)
1113 {
1114 fsizeT size;
1115 char buf[TP_BSIZE];
1116 struct new_bsd_inode nbi;
1117 struct convert_dir_context cdc;
1118 errcode_t retval;
1119 struct ext2_dir_entry *de;
1120 fsizeT dir_size;
1121
1122 if (newtape) {
1123 newtape = 0;
1124 dumpmap(dumpinomap, TS_BITS, ino);
1125 }
1126 CLRINO(ino, dumpinomap);
1127
1128 /*
1129 * Convert the directory to the BSD format
1130 */
1131 /* Allocate a buffer for the conversion (twice the size of the
1132 ext2fs directory to avoid problems ;-) */
1133 cdc.buf = (char *)malloc(dp->di_size * 2 * sizeof(char));
1134 if (cdc.buf == NULL)
1135 err(1, "Cannot allocate buffer to convert directory #%lu\n",
1136 (unsigned long)ino);
1137 cdc.offset = 0;
1138 cdc.prev_offset = 0;
1139 cdc.bs = MIN(DIRBLKSIZ, TP_BSIZE);
1140 /* Do the conversion */
1141 retval = ext2fs_dir_iterate(fs, (ext2_ino_t)ino, 0, NULL, convert_dir, (void *)&cdc);
1142 if (retval) {
1143 com_err(disk, retval, "while converting directory #%ld\n", (long)ino);
1144 exit(X_ABORT);
1145 }
1146 /* Fix the last entry */
1147 if ((cdc.offset % cdc.bs) != 0) {
1148 de = (struct ext2_dir_entry *)(cdc.buf + cdc.prev_offset);
1149 de->rec_len += cdc.bs - (cdc.offset % cdc.bs);
1150 cdc.offset += cdc.bs - (cdc.offset % cdc.bs);
1151 }
1152
1153 dir_size = cdc.offset;
1154
1155 #ifdef __linux__
1156 memset(&nbi, 0, sizeof(nbi));
1157 nbi.di_mode = dp->di_mode;
1158 nbi.di_nlink = dp->di_nlink;
1159 nbi.di_ouid = dp->di_uid;
1160 nbi.di_ogid = dp->di_gid;
1161 nbi.di_size = dir_size; /* (u_quad_t)dp->di_size; */
1162 nbi.di_atime.tv_sec = dp->di_atime;
1163 nbi.di_mtime.tv_sec = dp->di_mtime;
1164 nbi.di_ctime.tv_sec = dp->di_ctime;
1165 memmove(&nbi.di_db, &dp->di_db, (NDADDR + NIADDR) * sizeof(daddr_t));
1166 nbi.di_flags = dp->di_flags;
1167 nbi.di_blocks = dp->di_blocks;
1168 nbi.di_gen = dp->di_gen;
1169 nbi.di_uid = (((int32_t)dp->di_uidhigh) << 16) | dp->di_uid;
1170 nbi.di_gid = (((int32_t)dp->di_gidhigh) << 16) | dp->di_gid;
1171 memmove(&spcl.c_dinode, &nbi, sizeof(nbi));
1172 #else /* __linux__ */
1173 spcl.c_dinode = *dp;
1174 #endif /* __linux__ */
1175 spcl.c_type = TS_INODE;
1176 spcl.c_count = 0;
1177 switch (dp->di_mode & S_IFMT) {
1178
1179 case 0:
1180 /*
1181 * Freed inode.
1182 */
1183 return;
1184
1185 case S_IFDIR:
1186 if (dir_size > 0)
1187 break;
1188 msg("Warning: size of directory inode #%d is <= 0 (%d)!\n",
1189 ino, dir_size);
1190 return;
1191
1192 default:
1193 msg("Warning: dumpdirino called with file type 0%o (inode #%d)\n",
1194 dp->di_mode & IFMT, ino);
1195 return;
1196 }
1197 for (size = 0; size < dir_size; size += TP_BSIZE) {
1198 spcl.c_addr[0] = 1;
1199 spcl.c_count = 1;
1200 writeheader(ino);
1201 memmove(buf, cdc.buf + size, TP_BSIZE);
1202 writerec(buf, 0);
1203 spcl.c_type = TS_ADDR;
1204 }
1205
1206 (void)free(cdc.buf);
1207 dump_xattr(ino, dp);
1208 }
1209 #endif /* __linux__ */
1210
1211 #ifndef __linux__
1212 /*
1213 * Read indirect blocks, and pass the data blocks to be dumped.
1214 */
1215 static void
1216 dmpindir(dump_ino_t ino, daddr_t blk, int ind_level, fsizeT *size)
1217 {
1218 int i, cnt;
1219 #ifdef __linux__
1220 int max;
1221 blk_t *swapme;
1222 #endif
1223 daddr_t idblk[MAXNINDIR];
1224
1225 if (blk != 0) {
1226 bread(fsbtodb(sblock, blk), (char *)idblk, (int) sblock->fs_bsize);
1227 #ifdef __linux__
1228 /*
1229 * My RedHat 4.0 system doesn't have these flags; I haven't
1230 * upgraded e2fsprogs yet
1231 */
1232 #if defined(EXT2_FLAG_SWAP_BYTES)
1233 if ((fs->flags & EXT2_FLAG_SWAP_BYTES) ||
1234 (fs->flags & EXT2_FLAG_SWAP_BYTES_READ))
1235 #endif
1236 {
1237 max = sblock->fs_bsize >> 2;
1238 swapme = (blk_t *) idblk;
1239 for (i = 0; i < max; i++, swapme++)
1240 *swapme = ext2fs_swab32(*swapme);
1241 }
1242 #endif /* __linux__ */
1243 else
1244 memset(idblk, 0, (int)sblock->fs_bsize);
1245 if (ind_level <= 0) {
1246 if (*size < NINDIR(sblock) * sblock->fs_bsize)
1247 cnt = howmany(*size, sblock->fs_fsize);
1248 else
1249 #ifdef __linux__
1250 cnt = NINDIR(sblock) * EXT2_FRAGS_PER_BLOCK(fs->super);
1251 #else
1252 cnt = NINDIR(sblock) * sblock->fs_frag;
1253 #endif
1254 *size -= NINDIR(sblock) * sblock->fs_bsize;
1255 blksout(&idblk[0], cnt, ino);
1256 return;
1257 }
1258 ind_level--;
1259 for (i = 0; i < NINDIR(sblock); i++) {
1260 dmpindir(ino, idblk[i], ind_level, size);
1261 if (*size <= 0)
1262 return;
1263 }
1264 }
1265 #endif
1266
1267 /*
1268 * Collect up the data into tape record sized buffers and output them.
1269 */
1270 void
1271 blksout(blk_t *blkp, int frags, dump_ino_t ino)
1272 {
1273 blk_t *bp;
1274 int i, j, count, blks, tbperdb;
1275
1276 blks = howmany(frags * sblock->fs_fsize, TP_BSIZE);
1277 tbperdb = sblock->fs_bsize >> tp_bshift;
1278 for (i = 0; i < blks; i += TP_NINDIR) {
1279 if (i + TP_NINDIR > blks)
1280 count = blks;
1281 else
1282 count = i + TP_NINDIR;
1283 for (j = i; j < count; j++)
1284 if (blkp[j / tbperdb] != 0)
1285 spcl.c_addr[j - i] = 1;
1286 else
1287 spcl.c_addr[j - i] = 0;
1288 spcl.c_count = count - i;
1289 writeheader(ino);
1290 bp = &blkp[i / tbperdb];
1291 for (j = i; j < count; j += tbperdb, bp++) {
1292 if (*bp != 0) {
1293 if (j + tbperdb <= count)
1294 dumpblock(*bp, (int)sblock->fs_bsize);
1295 else
1296 dumpblock(*bp, (count - j) * TP_BSIZE);
1297 }
1298 }
1299 spcl.c_type = TS_ADDR;
1300 }
1301 }
1302
1303 /*
1304 * Dump a map to the tape.
1305 */
1306 void
1307 dumpmap(char *map, int type, dump_ino_t ino)
1308 {
1309 int i;
1310 char *cp;
1311
1312 spcl.c_type = type;
1313 spcl.c_count = howmany(mapsize * sizeof(char), TP_BSIZE);
1314 spcl.c_dinode.di_size = mapsize;
1315 writeheader(ino);
1316 for (i = 0, cp = map; i < spcl.c_count; i++, cp += TP_BSIZE)
1317 writerec(cp, 0);
1318 }
1319
1320 #if defined(__linux__) && !defined(int32_t)
1321 #define int32_t __s32
1322 #endif
1323
1324 /*
1325 * Compute and fill in checksum information.
1326 */
1327 void
1328 mkchecksum(union u_spcl *tmpspcl)
1329 {
1330 int32_t sum, cnt, *lp;
1331
1332 tmpspcl->s_spcl.c_checksum = 0;
1333 lp = (int32_t *)&tmpspcl->s_spcl;
1334 sum = 0;
1335 cnt = sizeof(union u_spcl) / (4 * sizeof(int32_t));
1336 while (--cnt >= 0) {
1337 sum += *lp++;
1338 sum += *lp++;
1339 sum += *lp++;
1340 sum += *lp++;
1341 }
1342 tmpspcl->s_spcl.c_checksum = CHECKSUM - sum;
1343 }
1344
1345 /*
1346 * Write a header record to the dump tape.
1347 */
1348 void
1349 writeheader(dump_ino_t ino)
1350 {
1351 spcl.c_inumber = ino;
1352 spcl.c_magic = NFS_MAGIC;
1353 mkchecksum((union u_spcl *)&spcl);
1354 writerec((char *)&spcl, 1);
1355 }
1356
1357 #ifdef __linux__
1358 struct dinode *
1359 getino(dump_ino_t inum)
1360 {
1361 static struct dinode dinode;
1362 errcode_t err;
1363
1364 curino = inum;
1365 #ifdef HAVE_EXT2FS_READ_INODE_FULL
1366 err = ext2fs_read_inode_full(fs, (ext2_ino_t)inum, (struct ext2_inode *) &dinode, sizeof(struct dinode));
1367 #else
1368 err = ext2fs_read_inode(fs, (ext2_ino_t)inum, (struct ext2_inode *) &dinode);
1369 #endif
1370 if (err) {
1371 com_err(disk, err, "while reading inode #%ld\n", (long)inum);
1372 exit(X_ABORT);
1373 }
1374 return &dinode;
1375 }
1376 #else /* __linux__ */
1377 struct dinode *
1378 getino(dump_ino_t inum)
1379 {
1380 static daddr_t minino, maxino;
1381 static struct dinode inoblock[MAXINOPB];
1382
1383 curino = inum;
1384 if (inum >= minino && inum < maxino)
1385 return (&inoblock[inum - minino]);
1386 bread(fsbtodb(sblock, ino_to_fsba(sblock, inum)), (char *)inoblock,
1387 (int)sblock->fs_bsize);
1388 minino = inum - (inum % INOPB(sblock));
1389 maxino = minino + INOPB(sblock);
1390 return (&inoblock[inum - minino]);
1391 }
1392 #endif /* __linux__ */
1393
1394 /*
1395 * Read a chunk of data from the disk.
1396 * Try to recover from hard errors by reading in sector sized pieces.
1397 * Error recovery is attempted at most BREADEMAX times before seeking
1398 * consent from the operator to continue.
1399 */
1400 int breaderrors = 0;
1401
1402 void
1403 bread(ext2_loff_t blkno, char *buf, int size)
1404 {
1405 int cnt, i;
1406
1407 loop:
1408 #ifdef __linux__
1409 if (ext2fs_llseek(diskfd, (blkno << dev_bshift), 0) !=
1410 (blkno << dev_bshift))
1411 #else
1412 if (lseek(diskfd, ((off_t)blkno << dev_bshift), 0) !=
1413 ((off_t)blkno << dev_bshift))
1414 #endif
1415 msg("bread: lseek fails\n");
1416 if ((cnt = read(diskfd, buf, size)) == size)
1417 return;
1418 if (blkno + (size / dev_bsize) > fsbtodb(sblock, sblock->fs_size)) {
1419 /*
1420 * Trying to read the final fragment.
1421 *
1422 * NB - dump only works in TP_BSIZE blocks, hence
1423 * rounds `dev_bsize' fragments up to TP_BSIZE pieces.
1424 * It should be smarter about not actually trying to
1425 * read more than it can get, but for the time being
1426 * we punt and scale back the read only when it gets
1427 * us into trouble. (mkm 9/25/83)
1428 */
1429 size -= dev_bsize;
1430 goto loop;
1431 }
1432 if (cnt == -1)
1433 msg("read error from %s: %s: [block %d, ext2blk %d]: count=%d\n",
1434 disk, strerror(errno), blkno,
1435 dbtofsb(sblock, blkno), size);
1436 else
1437 msg("short read error from %s: [block %d, ext2blk %d]: count=%d, got=%d\n",
1438 disk, blkno, dbtofsb(sblock, blkno), size, cnt);
1439 if (breademax && ++breaderrors > breademax) {
1440 msg("More than %d block read errors from %d\n",
1441 breademax, disk);
1442 broadcast("DUMP IS AILING!\n");
1443 msg("This is an unrecoverable error.\n");
1444 if (!query("Do you want to attempt to continue?")){
1445 dumpabort(0);
1446 /*NOTREACHED*/
1447 } else
1448 breaderrors = 0;
1449 }
1450 /*
1451 * Zero buffer, then try to read each sector of buffer separately.
1452 */
1453 memset(buf, 0, size);
1454 for (i = 0; i < size; i += dev_bsize, buf += dev_bsize, blkno++) {
1455 #ifdef __linux__
1456 if (ext2fs_llseek(diskfd, (blkno << dev_bshift), 0) !=
1457 (blkno << dev_bshift))
1458 #else
1459 if (lseek(diskfd, ((off_t)blkno << dev_bshift), 0) !=
1460 ((off_t)blkno << dev_bshift))
1461 #endif
1462 msg("bread: lseek2 fails!\n");
1463 if ((cnt = read(diskfd, buf, (int)dev_bsize)) == dev_bsize)
1464 continue;
1465 if (cnt == -1) {
1466 msg("read error from %s: %s: [sector %d, ext2blk %d]: count=%d\n",
1467 disk, strerror(errno), blkno,
1468 dbtofsb(sblock, blkno), dev_bsize);
1469 continue;
1470 }
1471 msg("short read error from %s: [sector %d, ext2blk %d]: count=%d, got=%d\n",
1472 disk, blkno, dbtofsb(sblock, blkno), dev_bsize, cnt);
1473 }
1474 }