ac9db80d57ca576affc8f013a854f1d6c608599e
[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 1.67 2009/06/18 10:00:38 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 *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) || MSINCE(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 *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 *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 *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 *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 *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 *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 *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 *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 nodump = (TSTINO(ino, usedinomap) == 0);
578 if ((isdir & 1) == 0 ||
579 (TSTINO(ino, dumpinomap) && nodump == 0))
580 continue;
581 dp = getino(ino);
582 #ifdef __linux__
583 ret = 0;
584 mdc.ret = &ret;
585 mdc.nodump = nodump;
586 mdc.tapesize = tapesize;
587 ext2fs_dir_iterate(fs, ino, 0, NULL, searchdir, (void *) &mdc);
588 #else /* __linux__ */
589 filesize = dp->di_size;
590 for (ret = 0, i = 0; filesize > 0 && i < NDADDR; i++) {
591 if (dp->di_db[i] != 0)
592 ret |= searchdir(ino, dp->di_db[i],
593 (long)dblksize(sblock, dp, i),
594 filesize);
595 if (ret & HASDUMPEDFILE)
596 filesize = 0;
597 else
598 filesize -= sblock->fs_bsize;
599 }
600 for (i = 0; filesize > 0 && i < NIADDR; i++) {
601 if (dp->di_ib[i] == 0)
602 continue;
603 ret |= dirindir(ino, dp->di_ib[i], i, &filesize);
604 }
605 #endif /* __linux__ */
606 if (ret & HASDUMPEDFILE) {
607 SETINO(ino, dumpinomap);
608 *tapesize += blockest(dp);
609 change = 1;
610 continue;
611 }
612 if (nodump) {
613 if (ret & HASSUBDIRS)
614 change = 1; /* subdirs have inherited nodump */
615 CLRINO(ino, dumpdirmap);
616 } else if ((ret & HASSUBDIRS) == 0) {
617 if (!TSTINO(ino, dumpinomap)) {
618 CLRINO(ino, dumpdirmap);
619 change = 1;
620 }
621 }
622 }
623 return (change);
624 }
625
626 #ifndef __linux__
627 /*
628 * Read indirect blocks, and pass the data blocks to be searched
629 * as directories. Quit as soon as any entry is found that will
630 * require the directory to be dumped.
631 */
632 static int
633 dirindir(dump_ino_t ino, daddr_t blkno, int ind_level, long *filesize)
634 {
635 int ret = 0;
636 int i;
637 daddr_t idblk[MAXNINDIR];
638
639 bread(fsbtodb(sblock, blkno), (char *)idblk, (int)sblock->fs_bsize);
640 if (ind_level <= 0) {
641 for (i = 0; *filesize > 0 && i < NINDIR(sblock); i++) {
642 blkno = idblk[i];
643 if (blkno != 0)
644 ret |= searchdir(ino, blkno, sblock->fs_bsize,
645 *filesize);
646 if (ret & HASDUMPEDFILE)
647 *filesize = 0;
648 else
649 *filesize -= sblock->fs_bsize;
650 }
651 return (ret);
652 }
653 ind_level--;
654 for (i = 0; *filesize > 0 && i < NINDIR(sblock); i++) {
655 blkno = idblk[i];
656 if (blkno != 0)
657 ret |= dirindir(ino, blkno, ind_level, filesize);
658 }
659 return (ret);
660 }
661 #endif /* !__linux__ */
662
663 /*
664 * Scan a disk block containing directory information looking to see if
665 * any of the entries are on the dump list and to see if the directory
666 * contains any subdirectories.
667 */
668 #ifdef __linux__
669 static int
670 searchdir(struct ext2_dir_entry *dp, UNUSED(int offset),
671 UNUSED(int blocksize), UNUSED(char *buf), void *private)
672 {
673 struct mapdirs_context *mdc;
674 int *ret;
675 long *tapesize;
676 struct dinode *ip;
677
678 mdc = (struct mapdirs_context *)private;
679 ret = mdc->ret;
680 tapesize = mdc->tapesize;
681
682 if (dp->inode == 0)
683 return 0;
684 if (dp->name[0] == '.') {
685 if (( dp->name_len & 0xFF ) == 1)
686 return 0;
687 if (dp->name[1] == '.' && ( dp->name_len & 0xFF ) == 2)
688 return 0;
689 }
690 if (mdc->nodump) {
691 ip = getino(dp->inode);
692 if (TSTINO(dp->inode, dumpinomap)) {
693 CLRINO(dp->inode, dumpinomap);
694 *tapesize -= blockest(ip);
695 }
696 /* Add dir back to the dir map and remove from
697 * usedinomap to propagate nodump */
698 if ((ip->di_mode & IFMT) == IFDIR) {
699 SETINO(dp->inode, dumpdirmap);
700 CLRINO(dp->inode, usedinomap);
701 *ret |= HASSUBDIRS;
702 }
703 } else {
704 if (TSTINO(dp->inode, dumpinomap)) {
705 *ret |= HASDUMPEDFILE;
706 if (*ret & HASSUBDIRS)
707 return DIRENT_ABORT;
708 }
709 if (TSTINO(dp->inode, dumpdirmap)) {
710 *ret |= HASSUBDIRS;
711 if (*ret & HASDUMPEDFILE)
712 return DIRENT_ABORT;
713 }
714 }
715 return 0;
716 }
717
718 #else /* __linux__ */
719
720 static int
721 searchdir(dump_ino_t ino, daddr_t blkno, long size, long filesize)
722 {
723 struct direct *dp;
724 long loc, ret = 0;
725 char dblk[MAXBSIZE];
726
727 bread(fsbtodb(sblock, blkno), dblk, (int)size);
728 if (filesize < size)
729 size = filesize;
730 for (loc = 0; loc < size; ) {
731 dp = (struct direct *)(dblk + loc);
732 if (dp->d_reclen == 0) {
733 msg("corrupted directory, inumber %d\n", ino);
734 break;
735 }
736 loc += dp->d_reclen;
737 if (dp->d_ino == 0)
738 continue;
739 if (dp->d_name[0] == '.') {
740 if (dp->d_name[1] == '\0')
741 continue;
742 if (dp->d_name[1] == '.' && dp->d_name[2] == '\0')
743 continue;
744 }
745 if (TSTINO(dp->d_ino, dumpinomap)) {
746 ret |= HASDUMPEDFILE;
747 if (ret & HASSUBDIRS)
748 break;
749 }
750 if (TSTINO(dp->d_ino, dumpdirmap)) {
751 ret |= HASSUBDIRS;
752 if (ret & HASDUMPEDFILE)
753 break;
754 }
755 }
756 return (ret);
757 }
758 #endif /* __linux__ */
759
760 #ifdef __linux__
761
762 struct block_context {
763 ext2_ino_t ino;
764 int *buf;
765 int cnt;
766 int max;
767 int next_block;
768 };
769
770 /*
771 * Dump a block to the tape
772 */
773 static int
774 dumponeblock(UNUSED(ext2_filsys fs), blk_t *blocknr, e2_blkcnt_t blockcnt,
775 UNUSED(blk_t ref_block), UNUSED(int ref_offset), void * private)
776 {
777 struct block_context *p;
778 e2_blkcnt_t i;
779
780 p = (struct block_context *)private;
781 for (i = p->next_block; i < blockcnt; i++) {
782 p->buf[p->cnt++] = 0;
783 if (p->cnt == p->max) {
784 blksout (p->buf, p->cnt, p->ino);
785 p->cnt = 0;
786 }
787 }
788 p->buf[p->cnt++] = *blocknr;
789 if (p->cnt == p->max) {
790 blksout (p->buf, p->cnt, p->ino);
791 p->cnt = 0;
792 }
793 p->next_block = blockcnt + 1;
794 return 0;
795 }
796 #endif
797
798 static void
799 dump_xattr(dump_ino_t ino, struct dinode *dp) {
800
801 if (dp->di_extraisize != 0) {
802 #ifdef HAVE_EXT2FS_READ_INODE_FULL
803 char inode[EXT2_INODE_SIZE(fs->super)];
804 errcode_t err;
805 u_int32_t *magic;
806
807 memset(inode, 0, EXT2_INODE_SIZE(fs->super));
808 err = ext2fs_read_inode_full(fs, (ext2_ino_t)ino,
809 (struct ext2_inode *) inode,
810 EXT2_INODE_SIZE(fs->super));
811 if (err) {
812 com_err(disk, err, "while reading inode #%ld\n", (long)ino);
813 exit(X_ABORT);
814 }
815
816 magic = (void *)inode + EXT2_GOOD_OLD_INODE_SIZE + dp->di_extraisize;
817 if (*magic == EXT2_XATTR_MAGIC) {
818 char xattr[EXT2_INODE_SIZE(fs->super)];
819 int i;
820 char *cp;
821
822 if (vflag)
823 msg("dumping EA (inode) in inode #%ld\n", (long)ino);
824 memset(xattr, 0, EXT2_INODE_SIZE(fs->super));
825 memcpy(xattr, (void *)magic,
826 EXT2_INODE_SIZE(fs->super) -
827 (EXT2_GOOD_OLD_INODE_SIZE + dp->di_extraisize));
828 magic = (u_int32_t *)xattr;
829 *magic = EXT2_XATTR_MAGIC2;
830
831 spcl.c_type = TS_INODE;
832 spcl.c_dinode.di_size = EXT2_INODE_SIZE(fs->super);
833 spcl.c_flags |= DR_EXTATTRIBUTES;
834 spcl.c_extattributes = EXT_XATTR;
835 spcl.c_count = howmany(EXT2_INODE_SIZE(fs->super), TP_BSIZE);
836 writeheader(ino);
837 for (i = 0, cp = xattr; i < spcl.c_count; i++, cp += TP_BSIZE)
838 writerec(cp, 0);
839 spcl.c_flags &= ~DR_EXTATTRIBUTES;
840 spcl.c_extattributes = 0;
841 }
842 #endif
843 }
844
845 if (dp->di_file_acl) {
846
847 if (vflag)
848 msg("dumping EA (block) in inode #%ld\n", (long)ino);
849
850 spcl.c_type = TS_INODE;
851 spcl.c_dinode.di_size = sblock->fs_bsize;
852 spcl.c_flags |= DR_EXTATTRIBUTES;
853 spcl.c_extattributes = EXT_XATTR;
854 blksout(&dp->di_file_acl, EXT2_FRAGS_PER_BLOCK(fs->super), ino);
855 spcl.c_flags &= ~DR_EXTATTRIBUTES;
856 spcl.c_extattributes = 0;
857 }
858 }
859
860 /*
861 * Dump passes 3 and 4.
862 *
863 * Dump the contents of an inode to tape.
864 */
865 void
866 dumpino(struct dinode *dp, dump_ino_t ino, int metaonly)
867 {
868 unsigned long cnt;
869 fsizeT size, remaining;
870 char buf[TP_BSIZE];
871 struct new_bsd_inode nbi;
872 int i;
873 #ifdef __linux__
874 struct block_context bc;
875 #else
876 int ind_level;
877 #endif
878 u_quad_t i_size;
879
880 if (metaonly)
881 i_size = 0;
882 else
883 i_size = dp->di_size + ((u_quad_t) dp->di_size_high << 32);
884
885 if (newtape) {
886 newtape = 0;
887 dumpmap(dumpinomap, TS_BITS, ino);
888 }
889 CLRINO(ino, dumpinomap);
890 #ifdef __linux__
891 memset(&nbi, 0, sizeof(nbi));
892 nbi.di_mode = dp->di_mode;
893 nbi.di_nlink = dp->di_nlink;
894 nbi.di_ouid = dp->di_uid;
895 nbi.di_ogid = dp->di_gid;
896 nbi.di_size = i_size;
897 nbi.di_atime.tv_sec = dp->di_atime;
898 nbi.di_mtime.tv_sec = dp->di_mtime;
899 nbi.di_ctime.tv_sec = dp->di_ctime;
900 memmove(&nbi.di_db, &dp->di_db, (NDADDR + NIADDR) * sizeof(daddr_t));
901 nbi.di_flags = dp->di_flags;
902 nbi.di_blocks = dp->di_blocks;
903 nbi.di_gen = dp->di_gen;
904 nbi.di_uid = (((int32_t)dp->di_uidhigh) << 16) | dp->di_uid;
905 nbi.di_gid = (((int32_t)dp->di_gidhigh) << 16) | dp->di_gid;
906 memmove(&spcl.c_dinode, &nbi, sizeof(nbi));
907 #else /* __linux__ */
908 spcl.c_dinode = *dp;
909 #endif /* __linux__ */
910 spcl.c_type = TS_INODE;
911 spcl.c_count = 0;
912
913 if (metaonly && (dp->di_mode & S_IFMT)) {
914 spcl.c_flags |= DR_METAONLY;
915 spcl.c_count = 0;
916 writeheader(ino);
917 spcl.c_flags &= ~DR_METAONLY;
918 dump_xattr(ino, dp);
919 return;
920 }
921
922 switch (dp->di_mode & S_IFMT) {
923
924 case 0:
925 /*
926 * Freed inode.
927 */
928 return;
929
930 #ifdef __linux__
931 case S_IFDIR:
932 msg("Warning: dumpino called on a directory (ino %d)\n", ino);
933 return;
934 #endif
935
936 case S_IFLNK:
937 /*
938 * Check for short symbolic link.
939 */
940 #ifdef __linux__
941 if (i_size > 0 &&
942 i_size < EXT2_N_BLOCKS * sizeof (daddr_t)) {
943 spcl.c_addr[0] = 1;
944 spcl.c_count = 1;
945 writeheader(ino);
946 memmove(buf, dp->di_db, (u_long)dp->di_size);
947 buf[dp->di_size] = '\0';
948 writerec(buf, 0);
949 dump_xattr(ino, dp);
950 return;
951 }
952 #endif /* __linux__ */
953 #ifdef FS_44INODEFMT
954 if (dp->di_size > 0 &&
955 dp->di_size < sblock->fs_maxsymlinklen) {
956 spcl.c_addr[0] = 1;
957 spcl.c_count = 1;
958 writeheader(ino);
959 memmove(buf, dp->di_shortlink, (u_long)dp->di_size);
960 buf[dp->di_size] = '\0';
961 writerec(buf, 0);
962 return;
963 }
964 #endif
965 /* fall through */
966
967 #ifndef __linux__
968 case S_IFDIR:
969 #endif
970 case S_IFREG:
971 if (i_size)
972 break;
973 /* fall through */
974
975 case S_IFIFO:
976 case S_IFSOCK:
977 case S_IFCHR:
978 case S_IFBLK:
979 writeheader(ino);
980 dump_xattr(ino, dp);
981 return;
982
983 default:
984 msg("Warning: undefined file type 0%o\n", dp->di_mode & IFMT);
985 return;
986 }
987 #ifdef __linux__
988 bc.max = NINDIR(sblock) * EXT2_FRAGS_PER_BLOCK(fs->super);
989 bc.buf = (int *)malloc (bc.max * sizeof (int));
990 bc.cnt = 0;
991 bc.ino = ino;
992 bc.next_block = NDADDR;
993
994 ext2fs_block_iterate2(fs, (ext2_ino_t)ino, BLOCK_FLAG_DATA_ONLY, NULL, dumponeblock, (void *)&bc);
995 /* deal with holes at the end of the inode */
996 if (i_size > ((u_quad_t)bc.next_block) * sblock->fs_fsize) {
997 remaining = i_size - ((u_quad_t)bc.next_block) * sblock->fs_fsize;
998 for (i = 0; i < (int)howmany(remaining, sblock->fs_fsize); i++) {
999 bc.buf[bc.cnt++] = 0;
1000 if (bc.cnt == bc.max) {
1001 blksout (bc.buf, bc.cnt, bc.ino);
1002 bc.cnt = 0;
1003 }
1004 }
1005 }
1006 if (bc.cnt > 0) {
1007 blksout (bc.buf, bc.cnt, bc.ino);
1008 }
1009 free(bc.buf);
1010 dump_xattr(ino, dp);
1011 #else
1012 if (i_size > (u_quad_t)NDADDR * sblock->fs_bsize)
1013 cnt = NDADDR * sblock->fs_frag;
1014 else
1015 cnt = howmany(i_size, sblock->fs_fsize);
1016 blksout(&dp->di_db[0], cnt, ino);
1017 if ((quad_t) (size = i_size - NDADDR * sblock->fs_bsize) <= 0) {
1018 dump_xattr(ino, dp);
1019 return;
1020 }
1021 for (ind_level = 0; ind_level < NIADDR; ind_level++) {
1022 dmpindir(ino, dp->di_ib[ind_level], ind_level, &size);
1023 if (size <= 0)
1024 return;
1025 }
1026 #endif
1027 }
1028
1029 #ifdef __linux__
1030
1031 struct convert_dir_context {
1032 char *buf;
1033 int prev_offset;
1034 int offset;
1035 int bs;
1036 };
1037
1038 /*
1039 * This function converts an ext2fs directory entry to the BSD format.
1040 *
1041 * Basically, it adds a null-character at the end of the name, recomputes the
1042 * size of the entry, and creates it in a temporary buffer
1043 */
1044 static int
1045 convert_dir(struct ext2_dir_entry *dirent, UNUSED(int offset),
1046 UNUSED(int blocksize), UNUSED(char *buf), void *private)
1047 {
1048 struct convert_dir_context *p;
1049 struct direct *dp;
1050 int reclen;
1051
1052 /* do not save entries to excluded inodes */
1053 if (exclude_ino(dirent->inode))
1054 return 0;
1055
1056 p = (struct convert_dir_context *)private;
1057
1058 reclen = EXT2_DIR_REC_LEN((dirent->name_len & 0xFF) + 1);
1059 if (((p->offset + reclen - 1) / p->bs) != (p->offset / p->bs)) {
1060 dp = (struct direct *)(p->buf + p->prev_offset);
1061 dp->d_reclen += p->bs - (p->offset % p->bs);
1062 p->offset += p->bs - (p->offset % p->bs);
1063 }
1064
1065 dp = (struct direct *)(p->buf + p->offset);
1066 dp->d_ino = dirent->inode;
1067 dp->d_reclen = reclen;
1068 dp->d_namlen = dirent->name_len & 0xFF;
1069 switch ((dirent->name_len & 0xFF00) >> 8) {
1070 default:
1071 dp->d_type = DT_UNKNOWN;
1072 break;
1073 case EXT2_FT_REG_FILE:
1074 dp->d_type = DT_REG;
1075 break;
1076 case EXT2_FT_DIR:
1077 dp->d_type = DT_DIR;
1078 break;
1079 case EXT2_FT_CHRDEV:
1080 dp->d_type = DT_CHR;
1081 break;
1082 case EXT2_FT_BLKDEV:
1083 dp->d_type = DT_BLK;
1084 break;
1085 case EXT2_FT_FIFO:
1086 dp->d_type = DT_FIFO;
1087 break;
1088 case EXT2_FT_SOCK:
1089 dp->d_type = DT_SOCK;
1090 break;
1091 case EXT2_FT_SYMLINK:
1092 dp->d_type = DT_LNK;
1093 break;
1094 }
1095 strncpy(dp->d_name, dirent->name, dp->d_namlen);
1096 dp->d_name[dp->d_namlen] = '\0';
1097 p->prev_offset = p->offset;
1098 p->offset += reclen;
1099
1100 return 0;
1101 }
1102
1103 /*
1104 * Dump pass 3
1105 *
1106 * Dumps a directory to tape after converting it to the BSD format
1107 */
1108 void
1109 dumpdirino(struct dinode *dp, dump_ino_t ino)
1110 {
1111 fsizeT size;
1112 char buf[TP_BSIZE];
1113 struct new_bsd_inode nbi;
1114 struct convert_dir_context cdc;
1115 errcode_t retval;
1116 struct ext2_dir_entry *de;
1117 fsizeT dir_size;
1118
1119 if (newtape) {
1120 newtape = 0;
1121 dumpmap(dumpinomap, TS_BITS, ino);
1122 }
1123 CLRINO(ino, dumpinomap);
1124
1125 /*
1126 * Convert the directory to the BSD format
1127 */
1128 /* Allocate a buffer for the conversion (twice the size of the
1129 ext2fs directory to avoid problems ;-) */
1130 cdc.buf = (char *)malloc(dp->di_size * 2 * sizeof(char));
1131 if (cdc.buf == NULL)
1132 err(1, "Cannot allocate buffer to convert directory #%lu\n",
1133 (unsigned long)ino);
1134 cdc.offset = 0;
1135 cdc.prev_offset = 0;
1136 cdc.bs = MIN(DIRBLKSIZ, TP_BSIZE);
1137 /* Do the conversion */
1138 retval = ext2fs_dir_iterate(fs, (ext2_ino_t)ino, 0, NULL, convert_dir, (void *)&cdc);
1139 if (retval) {
1140 com_err(disk, retval, "while converting directory #%ld\n", (long)ino);
1141 exit(X_ABORT);
1142 }
1143 /* Fix the last entry */
1144 if ((cdc.offset % cdc.bs) != 0) {
1145 de = (struct ext2_dir_entry *)(cdc.buf + cdc.prev_offset);
1146 de->rec_len += cdc.bs - (cdc.offset % cdc.bs);
1147 cdc.offset += cdc.bs - (cdc.offset % cdc.bs);
1148 }
1149
1150 dir_size = cdc.offset;
1151
1152 #ifdef __linux__
1153 memset(&nbi, 0, sizeof(nbi));
1154 nbi.di_mode = dp->di_mode;
1155 nbi.di_nlink = dp->di_nlink;
1156 nbi.di_ouid = dp->di_uid;
1157 nbi.di_ogid = dp->di_gid;
1158 nbi.di_size = dir_size; /* (u_quad_t)dp->di_size; */
1159 nbi.di_atime.tv_sec = dp->di_atime;
1160 nbi.di_mtime.tv_sec = dp->di_mtime;
1161 nbi.di_ctime.tv_sec = dp->di_ctime;
1162 memmove(&nbi.di_db, &dp->di_db, (NDADDR + NIADDR) * sizeof(daddr_t));
1163 nbi.di_flags = dp->di_flags;
1164 nbi.di_blocks = dp->di_blocks;
1165 nbi.di_gen = dp->di_gen;
1166 nbi.di_uid = (((int32_t)dp->di_uidhigh) << 16) | dp->di_uid;
1167 nbi.di_gid = (((int32_t)dp->di_gidhigh) << 16) | dp->di_gid;
1168 memmove(&spcl.c_dinode, &nbi, sizeof(nbi));
1169 #else /* __linux__ */
1170 spcl.c_dinode = *dp;
1171 #endif /* __linux__ */
1172 spcl.c_type = TS_INODE;
1173 spcl.c_count = 0;
1174 switch (dp->di_mode & S_IFMT) {
1175
1176 case 0:
1177 /*
1178 * Freed inode.
1179 */
1180 return;
1181
1182 case S_IFDIR:
1183 if (dir_size > 0)
1184 break;
1185 msg("Warning: size of directory inode #%d is <= 0 (%d)!\n",
1186 ino, dir_size);
1187 return;
1188
1189 default:
1190 msg("Warning: dumpdirino called with file type 0%o (inode #%d)\n",
1191 dp->di_mode & IFMT, ino);
1192 return;
1193 }
1194 for (size = 0; size < dir_size; size += TP_BSIZE) {
1195 spcl.c_addr[0] = 1;
1196 spcl.c_count = 1;
1197 writeheader(ino);
1198 memmove(buf, cdc.buf + size, TP_BSIZE);
1199 writerec(buf, 0);
1200 spcl.c_type = TS_ADDR;
1201 }
1202
1203 (void)free(cdc.buf);
1204 dump_xattr(ino, dp);
1205 }
1206 #endif /* __linux__ */
1207
1208 #ifndef __linux__
1209 /*
1210 * Read indirect blocks, and pass the data blocks to be dumped.
1211 */
1212 static void
1213 dmpindir(dump_ino_t ino, daddr_t blk, int ind_level, fsizeT *size)
1214 {
1215 int i, cnt;
1216 #ifdef __linux__
1217 int max;
1218 blk_t *swapme;
1219 #endif
1220 daddr_t idblk[MAXNINDIR];
1221
1222 if (blk != 0) {
1223 bread(fsbtodb(sblock, blk), (char *)idblk, (int) sblock->fs_bsize);
1224 #ifdef __linux__
1225 /*
1226 * My RedHat 4.0 system doesn't have these flags; I haven't
1227 * upgraded e2fsprogs yet
1228 */
1229 #if defined(EXT2_FLAG_SWAP_BYTES)
1230 if ((fs->flags & EXT2_FLAG_SWAP_BYTES) ||
1231 (fs->flags & EXT2_FLAG_SWAP_BYTES_READ))
1232 #endif
1233 {
1234 max = sblock->fs_bsize >> 2;
1235 swapme = (blk_t *) idblk;
1236 for (i = 0; i < max; i++, swapme++)
1237 *swapme = ext2fs_swab32(*swapme);
1238 }
1239 #endif /* __linux__ */
1240 else
1241 memset(idblk, 0, (int)sblock->fs_bsize);
1242 if (ind_level <= 0) {
1243 if (*size < NINDIR(sblock) * sblock->fs_bsize)
1244 cnt = howmany(*size, sblock->fs_fsize);
1245 else
1246 #ifdef __linux__
1247 cnt = NINDIR(sblock) * EXT2_FRAGS_PER_BLOCK(fs->super);
1248 #else
1249 cnt = NINDIR(sblock) * sblock->fs_frag;
1250 #endif
1251 *size -= NINDIR(sblock) * sblock->fs_bsize;
1252 blksout(&idblk[0], cnt, ino);
1253 return;
1254 }
1255 ind_level--;
1256 for (i = 0; i < NINDIR(sblock); i++) {
1257 dmpindir(ino, idblk[i], ind_level, size);
1258 if (*size <= 0)
1259 return;
1260 }
1261 }
1262 #endif
1263
1264 /*
1265 * Collect up the data into tape record sized buffers and output them.
1266 */
1267 void
1268 blksout(blk_t *blkp, int frags, dump_ino_t ino)
1269 {
1270 blk_t *bp;
1271 int i, j, count, blks, tbperdb;
1272
1273 blks = howmany(frags * sblock->fs_fsize, TP_BSIZE);
1274 tbperdb = sblock->fs_bsize >> tp_bshift;
1275 for (i = 0; i < blks; i += TP_NINDIR) {
1276 if (i + TP_NINDIR > blks)
1277 count = blks;
1278 else
1279 count = i + TP_NINDIR;
1280 for (j = i; j < count; j++)
1281 if (blkp[j / tbperdb] != 0)
1282 spcl.c_addr[j - i] = 1;
1283 else
1284 spcl.c_addr[j - i] = 0;
1285 spcl.c_count = count - i;
1286 writeheader(ino);
1287 bp = &blkp[i / tbperdb];
1288 for (j = i; j < count; j += tbperdb, bp++) {
1289 if (*bp != 0) {
1290 if (j + tbperdb <= count)
1291 dumpblock(*bp, (int)sblock->fs_bsize);
1292 else
1293 dumpblock(*bp, (count - j) * TP_BSIZE);
1294 }
1295 }
1296 spcl.c_type = TS_ADDR;
1297 }
1298 }
1299
1300 /*
1301 * Dump a map to the tape.
1302 */
1303 void
1304 dumpmap(char *map, int type, dump_ino_t ino)
1305 {
1306 int i;
1307 char *cp;
1308
1309 spcl.c_type = type;
1310 spcl.c_count = howmany(mapsize * sizeof(char), TP_BSIZE);
1311 spcl.c_dinode.di_size = mapsize;
1312 writeheader(ino);
1313 for (i = 0, cp = map; i < spcl.c_count; i++, cp += TP_BSIZE)
1314 writerec(cp, 0);
1315 }
1316
1317 #if defined(__linux__) && !defined(int32_t)
1318 #define int32_t __s32
1319 #endif
1320
1321 /*
1322 * Compute and fill in checksum information.
1323 */
1324 void
1325 mkchecksum(union u_spcl *tmpspcl)
1326 {
1327 int32_t sum, cnt, *lp;
1328
1329 tmpspcl->s_spcl.c_checksum = 0;
1330 lp = (int32_t *)&tmpspcl->s_spcl;
1331 sum = 0;
1332 cnt = sizeof(union u_spcl) / (4 * sizeof(int32_t));
1333 while (--cnt >= 0) {
1334 sum += *lp++;
1335 sum += *lp++;
1336 sum += *lp++;
1337 sum += *lp++;
1338 }
1339 tmpspcl->s_spcl.c_checksum = CHECKSUM - sum;
1340 }
1341
1342 /*
1343 * Write a header record to the dump tape.
1344 */
1345 void
1346 writeheader(dump_ino_t ino)
1347 {
1348 spcl.c_inumber = ino;
1349 spcl.c_magic = NFS_MAGIC;
1350 mkchecksum((union u_spcl *)&spcl);
1351 writerec((char *)&spcl, 1);
1352 }
1353
1354 #ifdef __linux__
1355 struct dinode *
1356 getino(dump_ino_t inum)
1357 {
1358 static struct dinode dinode;
1359 errcode_t err;
1360
1361 curino = inum;
1362 #ifdef HAVE_EXT2FS_READ_INODE_FULL
1363 err = ext2fs_read_inode_full(fs, (ext2_ino_t)inum, (struct ext2_inode *) &dinode, sizeof(struct dinode));
1364 #else
1365 err = ext2fs_read_inode(fs, (ext2_ino_t)inum, (struct ext2_inode *) &dinode);
1366 #endif
1367 if (err) {
1368 com_err(disk, err, "while reading inode #%ld\n", (long)inum);
1369 exit(X_ABORT);
1370 }
1371 return &dinode;
1372 }
1373 #else /* __linux__ */
1374 struct dinode *
1375 getino(dump_ino_t inum)
1376 {
1377 static daddr_t minino, maxino;
1378 static struct dinode inoblock[MAXINOPB];
1379
1380 curino = inum;
1381 if (inum >= minino && inum < maxino)
1382 return (&inoblock[inum - minino]);
1383 bread(fsbtodb(sblock, ino_to_fsba(sblock, inum)), (char *)inoblock,
1384 (int)sblock->fs_bsize);
1385 minino = inum - (inum % INOPB(sblock));
1386 maxino = minino + INOPB(sblock);
1387 return (&inoblock[inum - minino]);
1388 }
1389 #endif /* __linux__ */
1390
1391 /*
1392 * Read a chunk of data from the disk.
1393 * Try to recover from hard errors by reading in sector sized pieces.
1394 * Error recovery is attempted at most BREADEMAX times before seeking
1395 * consent from the operator to continue.
1396 */
1397 int breaderrors = 0;
1398
1399 void
1400 bread(ext2_loff_t blkno, char *buf, int size)
1401 {
1402 int cnt, i;
1403
1404 loop:
1405 #ifdef __linux__
1406 if (ext2fs_llseek(diskfd, (blkno << dev_bshift), 0) !=
1407 (blkno << dev_bshift))
1408 #else
1409 if (lseek(diskfd, ((off_t)blkno << dev_bshift), 0) !=
1410 ((off_t)blkno << dev_bshift))
1411 #endif
1412 msg("bread: lseek fails\n");
1413 if ((cnt = read(diskfd, buf, size)) == size)
1414 return;
1415 if (blkno + (size / dev_bsize) > fsbtodb(sblock, sblock->fs_size)) {
1416 /*
1417 * Trying to read the final fragment.
1418 *
1419 * NB - dump only works in TP_BSIZE blocks, hence
1420 * rounds `dev_bsize' fragments up to TP_BSIZE pieces.
1421 * It should be smarter about not actually trying to
1422 * read more than it can get, but for the time being
1423 * we punt and scale back the read only when it gets
1424 * us into trouble. (mkm 9/25/83)
1425 */
1426 size -= dev_bsize;
1427 goto loop;
1428 }
1429 if (cnt == -1)
1430 msg("read error from %s: %s: [block %d, ext2blk %d]: count=%d\n",
1431 disk, strerror(errno), blkno,
1432 dbtofsb(sblock, blkno), size);
1433 else
1434 msg("short read error from %s: [block %d, ext2blk %d]: count=%d, got=%d\n",
1435 disk, blkno, dbtofsb(sblock, blkno), size, cnt);
1436 if (breademax && ++breaderrors > breademax) {
1437 msg("More than %d block read errors from %d\n",
1438 breademax, disk);
1439 broadcast("DUMP IS AILING!\n");
1440 msg("This is an unrecoverable error.\n");
1441 if (!query("Do you want to attempt to continue?")){
1442 dumpabort(0);
1443 /*NOTREACHED*/
1444 } else
1445 breaderrors = 0;
1446 }
1447 /*
1448 * Zero buffer, then try to read each sector of buffer separately.
1449 */
1450 memset(buf, 0, size);
1451 for (i = 0; i < size; i += dev_bsize, buf += dev_bsize, blkno++) {
1452 #ifdef __linux__
1453 if (ext2fs_llseek(diskfd, (blkno << dev_bshift), 0) !=
1454 (blkno << dev_bshift))
1455 #else
1456 if (lseek(diskfd, ((off_t)blkno << dev_bshift), 0) !=
1457 ((off_t)blkno << dev_bshift))
1458 #endif
1459 msg("bread: lseek2 fails!\n");
1460 if ((cnt = read(diskfd, buf, (int)dev_bsize)) == dev_bsize)
1461 continue;
1462 if (cnt == -1) {
1463 msg("read error from %s: %s: [sector %d, ext2blk %d]: count=%d\n",
1464 disk, strerror(errno), blkno,
1465 dbtofsb(sblock, blkno), dev_bsize);
1466 continue;
1467 }
1468 msg("short read error from %s: [sector %d, ext2blk %d]: count=%d, got=%d\n",
1469 disk, blkno, dbtofsb(sblock, blkno), dev_bsize, cnt);
1470 }
1471 }