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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 <pop@cybercable.fr>, 1999 | |
6 | */ | |
7 | ||
8 | /*- | |
9 | * Copyright (c) 1980, 1988, 1991, 1993 | |
10 | * The Regents of the University of California. All rights reserved. | |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or without | |
13 | * modification, are permitted provided that the following conditions | |
14 | * are met: | |
15 | * 1. Redistributions of source code must retain the above copyright | |
16 | * notice, this list of conditions and the following disclaimer. | |
17 | * 2. Redistributions in binary form must reproduce the above copyright | |
18 | * notice, this list of conditions and the following disclaimer in the | |
19 | * documentation and/or other materials provided with the distribution. | |
20 | * 3. All advertising materials mentioning features or use of this software | |
21 | * must display the following acknowledgement: | |
22 | * This product includes software developed by the University of | |
23 | * California, Berkeley and its contributors. | |
24 | * 4. Neither the name of the University nor the names of its contributors | |
25 | * may be used to endorse or promote products derived from this software | |
26 | * without specific prior written permission. | |
27 | * | |
28 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
29 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
30 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
31 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
32 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
33 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
34 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
35 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
36 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
37 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
38 | * SUCH DAMAGE. | |
39 | */ | |
40 | ||
41 | #ifndef lint | |
42 | static const char rcsid[] = | |
43 | "$Id: traverse.c,v 1.7 1999/11/02 09:35:56 tiniou Exp $"; | |
44 | #endif /* not lint */ | |
45 | ||
46 | #include <sys/param.h> | |
47 | #include <sys/stat.h> | |
48 | #ifdef __linux__ | |
49 | #include <linux/ext2_fs.h> | |
50 | #include <bsdcompat.h> | |
51 | #include <compaterr.h> | |
52 | #include <stdlib.h> | |
53 | #define swab32(x) ext2fs_swab32(x) | |
54 | #else /* __linux__ */ | |
55 | #define swab32(x) x | |
56 | #ifdef sunos | |
57 | #include <sys/vnode.h> | |
58 | ||
59 | #include <ufs/fs.h> | |
60 | #include <ufs/fsdir.h> | |
61 | #include <ufs/inode.h> | |
62 | #else | |
63 | #include <ufs/ufs/dir.h> | |
64 | #include <ufs/ufs/dinode.h> | |
65 | #include <ufs/ffs/fs.h> | |
66 | #endif | |
67 | #endif /* __linux__ */ | |
68 | ||
69 | #include <protocols/dumprestore.h> | |
70 | ||
71 | #include <ctype.h> | |
72 | #include <stdio.h> | |
73 | #ifdef __STDC__ | |
74 | #include <string.h> | |
75 | #include <unistd.h> | |
76 | #endif | |
77 | ||
78 | #ifdef __linux__ | |
79 | #include <ext2fs/ext2fs.h> | |
80 | #endif | |
81 | ||
82 | #include "dump.h" | |
83 | ||
84 | #define HASDUMPEDFILE 0x1 | |
85 | #define HASSUBDIRS 0x2 | |
86 | ||
87 | #ifdef FS_44INODEFMT | |
88 | typedef quad_t fsizeT; | |
89 | #else | |
90 | typedef long fsizeT; | |
91 | #endif | |
92 | ||
93 | #ifdef __linux__ | |
94 | static int searchdir __P((struct ext2_dir_entry *dp, int offset, | |
95 | int blocksize, char *buf, void *private)); | |
96 | #else | |
97 | static int dirindir __P((ino_t ino, daddr_t blkno, int level, long *size)); | |
98 | static void dmpindir __P((ino_t ino, daddr_t blk, int level, fsizeT *size)); | |
99 | static int searchdir __P((ino_t ino, daddr_t blkno, long size, long filesize)); | |
100 | #endif | |
101 | ||
102 | /* | |
103 | * This is an estimation of the number of TP_BSIZE blocks in the file. | |
104 | * It estimates the number of blocks in files with holes by assuming | |
105 | * that all of the blocks accounted for by di_blocks are data blocks | |
106 | * (when some of the blocks are usually used for indirect pointers); | |
107 | * hence the estimate may be high. | |
108 | */ | |
109 | long | |
110 | blockest(struct dinode *dp) | |
111 | { | |
112 | long blkest, sizeest; | |
113 | ||
114 | /* | |
115 | * dp->di_size is the size of the file in bytes. | |
116 | * dp->di_blocks stores the number of sectors actually in the file. | |
117 | * If there are more sectors than the size would indicate, this just | |
118 | * means that there are indirect blocks in the file or unused | |
119 | * sectors in the last file block; we can safely ignore these | |
120 | * (blkest = sizeest below). | |
121 | * If the file is bigger than the number of sectors would indicate, | |
122 | * then the file has holes in it. In this case we must use the | |
123 | * block count to estimate the number of data blocks used, but | |
124 | * we use the actual size for estimating the number of indirect | |
125 | * dump blocks (sizeest vs. blkest in the indirect block | |
126 | * calculation). | |
127 | */ | |
128 | blkest = howmany(dbtob(dp->di_blocks), TP_BSIZE); | |
129 | sizeest = howmany(dp->di_size, TP_BSIZE); | |
130 | if (blkest > sizeest) | |
131 | blkest = sizeest; | |
132 | #ifdef __linux__ | |
133 | if (dp->di_size > fs->blocksize * NDADDR) { | |
134 | /* calculate the number of indirect blocks on the dump tape */ | |
135 | blkest += | |
136 | howmany(sizeest - NDADDR * fs->blocksize / TP_BSIZE, | |
137 | TP_NINDIR); | |
138 | } | |
139 | #else | |
140 | if (dp->di_size > sblock->fs_bsize * NDADDR) { | |
141 | /* calculate the number of indirect blocks on the dump tape */ | |
142 | blkest += | |
143 | howmany(sizeest - NDADDR * sblock->fs_bsize / TP_BSIZE, | |
144 | TP_NINDIR); | |
145 | } | |
146 | #endif | |
147 | return (blkest + 1); | |
148 | } | |
149 | ||
150 | /* Auxiliary macro to pick up files changed since previous dump. */ | |
151 | #define CHANGEDSINCE(dp, t) \ | |
152 | ((dp)->di_mtime >= (t) || (dp)->di_ctime >= (t)) | |
153 | ||
154 | /* The WANTTODUMP macro decides whether a file should be dumped. */ | |
155 | #ifdef UF_NODUMP | |
156 | #define WANTTODUMP(dp) \ | |
157 | (CHANGEDSINCE(dp, spcl.c_ddate) && \ | |
158 | (nonodump || ((dp)->di_flags & UF_NODUMP) != UF_NODUMP)) | |
159 | #else | |
160 | #define WANTTODUMP(dp) CHANGEDSINCE(dp, spcl.c_ddate) | |
161 | #endif | |
162 | ||
163 | /* | |
164 | * Dump pass 1. | |
165 | * | |
166 | * Walk the inode list for a filesystem to find all allocated inodes | |
167 | * that have been modified since the previous dump time. Also, find all | |
168 | * the directories in the filesystem. | |
169 | */ | |
170 | int | |
171 | mapfiles(ino_t maxino, long *tapesize) | |
172 | { | |
173 | register int mode; | |
174 | register ino_t ino; | |
175 | register struct dinode *dp; | |
176 | int anydirskipped = 0; | |
177 | ||
178 | for (ino = ROOTINO; ino < maxino; ino++) { | |
179 | dp = getino(ino); | |
180 | if ((mode = (dp->di_mode & IFMT)) == 0) | |
181 | continue; | |
182 | #ifdef __linux__ | |
183 | if (dp->di_nlink == 0 || dp->di_dtime != 0) | |
184 | continue; | |
185 | #endif | |
186 | SETINO(ino, usedinomap); | |
187 | if (mode == IFDIR) | |
188 | SETINO(ino, dumpdirmap); | |
189 | if (WANTTODUMP(dp)) { | |
190 | SETINO(ino, dumpinomap); | |
191 | if (mode != IFREG && mode != IFDIR && mode != IFLNK) | |
192 | *tapesize += 1; | |
193 | else | |
194 | *tapesize += blockest(dp); | |
195 | continue; | |
196 | } | |
197 | if (mode == IFDIR) | |
198 | anydirskipped = 1; | |
199 | } | |
200 | /* | |
201 | * Restore gets very upset if the root is not dumped, | |
202 | * so ensure that it always is dumped. | |
203 | */ | |
204 | SETINO(ROOTINO, dumpinomap); | |
205 | return (anydirskipped); | |
206 | } | |
207 | ||
208 | #ifdef __linux__ | |
209 | struct mapfile_context { | |
210 | long *tapesize; | |
211 | int anydirskipped; | |
212 | }; | |
213 | ||
214 | static int | |
215 | mapfilesindir(struct ext2_dir_entry *dirent, int offset, int blocksize, char *buf, void *private) | |
216 | { | |
217 | register struct dinode *dp; | |
218 | register int mode; | |
219 | ino_t ino; | |
220 | errcode_t retval; | |
221 | struct mapfile_context *mfc; | |
222 | ||
223 | ino = dirent->inode; | |
224 | mfc = (struct mapfile_context *)private; | |
225 | dp = getino(ino); | |
226 | if ((mode = (dp->di_mode & IFMT)) != 0 && | |
227 | dp->di_nlink != 0 && dp->di_dtime == 0) { | |
228 | SETINO(ino, usedinomap); | |
229 | if (mode == IFDIR) | |
230 | SETINO(ino, dumpdirmap); | |
231 | if (WANTTODUMP(dp)) { | |
232 | SETINO(ino, dumpinomap); | |
233 | if (mode != IFREG && mode != IFDIR && mode != IFLNK) | |
234 | *mfc->tapesize += 1; | |
235 | else | |
236 | *mfc->tapesize += blockest(dp); | |
237 | } | |
238 | if (mode == IFDIR) { | |
239 | mfc->anydirskipped = 1; | |
240 | if ((dirent->name[0] != '.' || dirent->name_len != 1) && | |
241 | (dirent->name[0] != '.' || dirent->name[1] != '.' || | |
242 | dirent->name_len != 2)) { | |
243 | retval = ext2fs_dir_iterate(fs, ino, 0, NULL, | |
244 | mapfilesindir, private); | |
245 | if (retval) | |
246 | return retval; | |
247 | } | |
248 | } | |
249 | } | |
250 | return 0; | |
251 | } | |
252 | ||
253 | /* | |
254 | * Dump pass 1. | |
255 | * | |
256 | * Walk the inode list for a filesystem to find all allocated inodes | |
257 | * that have been modified since the previous dump time. Also, find all | |
258 | * the directories in the filesystem. | |
259 | */ | |
260 | int | |
261 | mapfilesfromdir(ino_t maxino, long *tapesize, char *directory) | |
262 | { | |
263 | errcode_t retval; | |
264 | struct mapfile_context mfc; | |
265 | ino_t dir_ino; | |
266 | char dir_name [MAXPATHLEN]; | |
267 | int i; | |
268 | ||
269 | /* | |
270 | * Mark every directory in the path as being dumped | |
271 | */ | |
272 | for (i = 0; i < strlen (directory); i++) { | |
273 | if (directory[i] == '/') { | |
274 | strncpy (dir_name, directory, i); | |
275 | dir_name[i] = '\0'; | |
276 | retval = ext2fs_namei(fs, ROOTINO, ROOTINO, dir_name, | |
277 | &dir_ino); | |
278 | if (retval) { | |
279 | com_err(disk, retval, "while translating %s", | |
280 | dir_name); | |
281 | exit(X_ABORT); | |
282 | } | |
283 | /* SETINO(dir_ino, dumpinomap); */ | |
284 | SETINO(dir_ino, dumpdirmap); | |
285 | } | |
286 | } | |
287 | /* | |
288 | * Mark the final directory | |
289 | */ | |
290 | retval = ext2fs_namei(fs, ROOTINO, ROOTINO, directory, &dir_ino); | |
291 | if (retval) { | |
292 | com_err(disk, retval, "while translating %s", directory); | |
293 | exit(X_ABORT); | |
294 | } | |
295 | /* SETINO(dir_ino, dumpinomap); */ | |
296 | SETINO(dir_ino, dumpdirmap); | |
297 | ||
298 | mfc.tapesize = tapesize; | |
299 | mfc.anydirskipped = 0; | |
300 | retval = ext2fs_dir_iterate(fs, dir_ino, 0, NULL, mapfilesindir, | |
301 | (void *)&mfc); | |
302 | ||
303 | if (retval) { | |
304 | com_err(disk, retval, "while mapping files in %s", directory); | |
305 | exit(X_ABORT); | |
306 | } | |
307 | /* | |
308 | * Restore gets very upset if the root is not dumped, | |
309 | * so ensure that it always is dumped. | |
310 | */ | |
311 | /* SETINO(ROOTINO, dumpinomap); */ | |
312 | SETINO(ROOTINO, dumpdirmap); | |
313 | return (mfc.anydirskipped); | |
314 | } | |
315 | #endif | |
316 | ||
317 | /* | |
318 | * Dump pass 2. | |
319 | * | |
320 | * Scan each directory on the filesystem to see if it has any modified | |
321 | * files in it. If it does, and has not already been added to the dump | |
322 | * list (because it was itself modified), then add it. If a directory | |
323 | * has not been modified itself, contains no modified files and has no | |
324 | * subdirectories, then it can be deleted from the dump list and from | |
325 | * the list of directories. By deleting it from the list of directories, | |
326 | * its parent may now qualify for the same treatment on this or a later | |
327 | * pass using this algorithm. | |
328 | */ | |
329 | int | |
330 | mapdirs(ino_t maxino, long *tapesize) | |
331 | { | |
332 | register struct dinode *dp; | |
333 | register int isdir; | |
334 | register char *map; | |
335 | register ino_t ino; | |
336 | #ifndef __linux__ | |
337 | register int i; | |
338 | long filesize; | |
339 | #endif | |
340 | int ret, change = 0; | |
341 | ||
342 | isdir = 0; /* XXX just to get gcc to shut up */ | |
343 | for (map = dumpdirmap, ino = 1; ino < maxino; ino++) { | |
344 | if (((ino - 1) % NBBY) == 0) /* map is offset by 1 */ | |
345 | isdir = *map++; | |
346 | else | |
347 | isdir >>= 1; | |
348 | if ((isdir & 1) == 0 || TSTINO(ino, dumpinomap)) | |
349 | continue; | |
350 | dp = getino(ino); | |
351 | #ifdef __linux__ | |
352 | ret = 0; | |
353 | ext2fs_dir_iterate(fs, ino, 0, NULL, searchdir, (void *) &ret); | |
354 | #else /* __linux__ */ | |
355 | filesize = dp->di_size; | |
356 | for (ret = 0, i = 0; filesize > 0 && i < NDADDR; i++) { | |
357 | if (dp->di_db[i] != 0) | |
358 | ret |= searchdir(ino, dp->di_db[i], | |
359 | (long)dblksize(sblock, dp, i), | |
360 | filesize); | |
361 | if (ret & HASDUMPEDFILE) | |
362 | filesize = 0; | |
363 | else | |
364 | filesize -= sblock->fs_bsize; | |
365 | } | |
366 | for (i = 0; filesize > 0 && i < NIADDR; i++) { | |
367 | if (dp->di_ib[i] == 0) | |
368 | continue; | |
369 | ret |= dirindir(ino, dp->di_ib[i], i, &filesize); | |
370 | } | |
371 | #endif /* __linux__ */ | |
372 | if (ret & HASDUMPEDFILE) { | |
373 | SETINO(ino, dumpinomap); | |
374 | *tapesize += blockest(dp); | |
375 | change = 1; | |
376 | continue; | |
377 | } | |
378 | if ((ret & HASSUBDIRS) == 0) { | |
379 | if (!TSTINO(ino, dumpinomap)) { | |
380 | CLRINO(ino, dumpdirmap); | |
381 | change = 1; | |
382 | } | |
383 | } | |
384 | } | |
385 | return (change); | |
386 | } | |
387 | ||
388 | #ifndef __linux__ | |
389 | /* | |
390 | * Read indirect blocks, and pass the data blocks to be searched | |
391 | * as directories. Quit as soon as any entry is found that will | |
392 | * require the directory to be dumped. | |
393 | */ | |
394 | static int | |
395 | dirindir(ino_t ino, daddr_t blkno, int ind_level, long *filesize) | |
396 | { | |
397 | int ret = 0; | |
398 | register int i; | |
399 | daddr_t idblk[MAXNINDIR]; | |
400 | ||
401 | bread(fsbtodb(sblock, blkno), (char *)idblk, (int)sblock->fs_bsize); | |
402 | if (ind_level <= 0) { | |
403 | for (i = 0; *filesize > 0 && i < NINDIR(sblock); i++) { | |
404 | blkno = idblk[i]; | |
405 | if (blkno != 0) | |
406 | ret |= searchdir(ino, blkno, sblock->fs_bsize, | |
407 | *filesize); | |
408 | if (ret & HASDUMPEDFILE) | |
409 | *filesize = 0; | |
410 | else | |
411 | *filesize -= sblock->fs_bsize; | |
412 | } | |
413 | return (ret); | |
414 | } | |
415 | ind_level--; | |
416 | for (i = 0; *filesize > 0 && i < NINDIR(sblock); i++) { | |
417 | blkno = idblk[i]; | |
418 | if (blkno != 0) | |
419 | ret |= dirindir(ino, blkno, ind_level, filesize); | |
420 | } | |
421 | return (ret); | |
422 | } | |
423 | #endif /* !__linux__ */ | |
424 | ||
425 | /* | |
426 | * Scan a disk block containing directory information looking to see if | |
427 | * any of the entries are on the dump list and to see if the directory | |
428 | * contains any subdirectories. | |
429 | */ | |
430 | #ifdef __linux__ | |
431 | static int | |
432 | searchdir(struct ext2_dir_entry *dp, int offset, int blocksize, char *buf, void *private) | |
433 | { | |
434 | int *ret = (int *) private; | |
435 | ||
436 | if (dp->inode == 0) | |
437 | return 0; | |
438 | if (dp->name[0] == '.') { | |
439 | if (dp->name_len == 1) | |
440 | return 0; | |
441 | if (dp->name[1] == '.' && dp->name_len == 2) | |
442 | return 0; | |
443 | } | |
444 | if (TSTINO(dp->inode, dumpinomap)) { | |
445 | *ret |= HASDUMPEDFILE; | |
446 | if (*ret & HASSUBDIRS) | |
447 | return DIRENT_ABORT; | |
448 | } | |
449 | if (TSTINO(dp->inode, dumpdirmap)) { | |
450 | *ret |= HASSUBDIRS; | |
451 | if (*ret & HASDUMPEDFILE) | |
452 | return DIRENT_ABORT; | |
453 | } | |
454 | return 0; | |
455 | } | |
456 | ||
457 | #else /* __linux__ */ | |
458 | ||
459 | static int | |
460 | searchdir(ino_t ino, daddr_t blkno, long size, long filesize) | |
461 | { | |
462 | register struct direct *dp; | |
463 | register long loc, ret = 0; | |
464 | char dblk[MAXBSIZE]; | |
465 | ||
466 | bread(fsbtodb(sblock, blkno), dblk, (int)size); | |
467 | if (filesize < size) | |
468 | size = filesize; | |
469 | for (loc = 0; loc < size; ) { | |
470 | dp = (struct direct *)(dblk + loc); | |
471 | if (dp->d_reclen == 0) { | |
472 | msg("corrupted directory, inumber %d\n", ino); | |
473 | break; | |
474 | } | |
475 | loc += dp->d_reclen; | |
476 | if (dp->d_ino == 0) | |
477 | continue; | |
478 | if (dp->d_name[0] == '.') { | |
479 | if (dp->d_name[1] == '\0') | |
480 | continue; | |
481 | if (dp->d_name[1] == '.' && dp->d_name[2] == '\0') | |
482 | continue; | |
483 | } | |
484 | if (TSTINO(dp->d_ino, dumpinomap)) { | |
485 | ret |= HASDUMPEDFILE; | |
486 | if (ret & HASSUBDIRS) | |
487 | break; | |
488 | } | |
489 | if (TSTINO(dp->d_ino, dumpdirmap)) { | |
490 | ret |= HASSUBDIRS; | |
491 | if (ret & HASDUMPEDFILE) | |
492 | break; | |
493 | } | |
494 | } | |
495 | return (ret); | |
496 | } | |
497 | #endif /* __linux__ */ | |
498 | ||
499 | #ifdef __linux__ | |
500 | ||
501 | struct block_context { | |
502 | ino_t ino; | |
503 | int *buf; | |
504 | int cnt; | |
505 | int max; | |
506 | int next_block; | |
507 | }; | |
508 | ||
509 | /* | |
510 | * Dump a block to the tape | |
511 | */ | |
512 | static int | |
513 | dumponeblock(ext2_filsys fs, blk_t *blocknr, int blockcnt, void *private) | |
514 | { | |
515 | struct block_context *p; | |
516 | int i; | |
517 | ||
518 | if (blockcnt < NDADDR) | |
519 | return 0; | |
520 | p = (struct block_context *)private; | |
521 | for (i = p->next_block; i < blockcnt; i++) { | |
522 | p->buf[p->cnt++] = 0; | |
523 | if (p->cnt == p->max) { | |
524 | blksout (p->buf, p->cnt, p->ino); | |
525 | p->cnt = 0; | |
526 | } | |
527 | } | |
528 | p->buf[p->cnt++] = *blocknr; | |
529 | if (p->cnt == p->max) { | |
530 | blksout (p->buf, p->cnt, p->ino); | |
531 | p->cnt = 0; | |
532 | } | |
533 | p->next_block = blockcnt + 1; | |
534 | return 0; | |
535 | } | |
536 | #endif | |
537 | ||
538 | /* | |
539 | * Dump passes 3 and 4. | |
540 | * | |
541 | * Dump the contents of an inode to tape. | |
542 | */ | |
543 | void | |
544 | dumpino(struct dinode *dp, ino_t ino) | |
545 | { | |
546 | int cnt; | |
547 | fsizeT size; | |
548 | char buf[TP_BSIZE]; | |
549 | struct old_bsd_inode obi; | |
550 | #ifdef __linux__ | |
551 | struct block_context bc; | |
552 | #else | |
553 | int ind_level; | |
554 | #endif | |
555 | ||
556 | if (newtape) { | |
557 | newtape = 0; | |
558 | dumpmap(dumpinomap, TS_BITS, ino); | |
559 | } | |
560 | CLRINO(ino, dumpinomap); | |
561 | #ifdef __linux__ | |
562 | memset(&obi, 0, sizeof(obi)); | |
563 | obi.di_mode = dp->di_mode; | |
564 | obi.di_uid = dp->di_uid; | |
565 | obi.di_gid = dp->di_gid; | |
566 | obi.di_qsize.v = (u_quad_t)dp->di_size; | |
567 | obi.di_atime = dp->di_atime; | |
568 | obi.di_mtime = dp->di_mtime; | |
569 | obi.di_ctime = dp->di_ctime; | |
570 | obi.di_nlink = dp->di_nlink; | |
571 | obi.di_blocks = dp->di_blocks; | |
572 | obi.di_flags = dp->di_flags; | |
573 | obi.di_gen = dp->di_gen; | |
574 | memmove(&obi.di_db, &dp->di_db, (NDADDR + NIADDR) * sizeof(daddr_t)); | |
575 | if (dp->di_file_acl || dp->di_dir_acl) | |
576 | warn("ACLs in inode #%ld won't be dumped", ino); | |
577 | memmove(&spcl.c_dinode, &obi, sizeof(obi)); | |
578 | #else /* __linux__ */ | |
579 | spcl.c_dinode = *dp; | |
580 | #endif /* __linux__ */ | |
581 | spcl.c_type = TS_INODE; | |
582 | spcl.c_count = 0; | |
583 | switch (dp->di_mode & S_IFMT) { | |
584 | ||
585 | case 0: | |
586 | /* | |
587 | * Freed inode. | |
588 | */ | |
589 | return; | |
590 | ||
591 | #ifdef __linux__ | |
592 | case S_IFDIR: | |
593 | msg("Warning: dumpino called on a directory (ino %d)\n", ino); | |
594 | return; | |
595 | #endif | |
596 | ||
597 | case S_IFLNK: | |
598 | /* | |
599 | * Check for short symbolic link. | |
600 | */ | |
601 | #ifdef __linux__ | |
602 | if (dp->di_size > 0 && | |
603 | dp->di_size < EXT2_N_BLOCKS * sizeof (daddr_t)) { | |
604 | spcl.c_addr[0] = 1; | |
605 | spcl.c_count = 1; | |
606 | writeheader(ino); | |
607 | memmove(buf, dp->di_db, (u_long)dp->di_size); | |
608 | buf[dp->di_size] = '\0'; | |
609 | writerec(buf, 0); | |
610 | return; | |
611 | } | |
612 | #endif /* __linux__ */ | |
613 | #ifdef FS_44INODEFMT | |
614 | if (dp->di_size > 0 && | |
615 | dp->di_size < sblock->fs_maxsymlinklen) { | |
616 | spcl.c_addr[0] = 1; | |
617 | spcl.c_count = 1; | |
618 | writeheader(ino); | |
619 | memmove(buf, dp->di_shortlink, (u_long)dp->di_size); | |
620 | buf[dp->di_size] = '\0'; | |
621 | writerec(buf, 0); | |
622 | return; | |
623 | } | |
624 | #endif | |
625 | /* fall through */ | |
626 | ||
627 | #ifndef __linux__ | |
628 | case S_IFDIR: | |
629 | #endif | |
630 | case S_IFREG: | |
631 | if (dp->di_size > 0) | |
632 | break; | |
633 | /* fall through */ | |
634 | ||
635 | case S_IFIFO: | |
636 | case S_IFSOCK: | |
637 | case S_IFCHR: | |
638 | case S_IFBLK: | |
639 | writeheader(ino); | |
640 | return; | |
641 | ||
642 | default: | |
643 | msg("Warning: undefined file type 0%o\n", dp->di_mode & IFMT); | |
644 | return; | |
645 | } | |
646 | if (dp->di_size > NDADDR * sblock->fs_bsize) | |
647 | #ifdef __linux__ | |
648 | cnt = NDADDR * EXT2_FRAGS_PER_BLOCK(fs->super); | |
649 | #else | |
650 | cnt = NDADDR * sblock->fs_frag; | |
651 | #endif | |
652 | else | |
653 | cnt = howmany(dp->di_size, sblock->fs_fsize); | |
654 | blksout(&dp->di_db[0], cnt, ino); | |
655 | if ((size = dp->di_size - NDADDR * sblock->fs_bsize) <= 0) | |
656 | return; | |
657 | #ifdef __linux__ | |
658 | bc.max = NINDIR(sblock) * EXT2_FRAGS_PER_BLOCK(fs->super); | |
659 | bc.buf = (int *)malloc (bc.max * sizeof (int)); | |
660 | bc.cnt = 0; | |
661 | bc.ino = ino; | |
662 | bc.next_block = NDADDR; | |
663 | ||
664 | ext2fs_block_iterate (fs, ino, 0, NULL, dumponeblock, (void *)&bc); | |
665 | if (bc.cnt > 0) { | |
666 | blksout (bc.buf, bc.cnt, bc.ino); | |
667 | } | |
668 | #else | |
669 | for (ind_level = 0; ind_level < NIADDR; ind_level++) { | |
670 | dmpindir(ino, dp->di_ib[ind_level], ind_level, &size); | |
671 | if (size <= 0) | |
672 | return; | |
673 | } | |
674 | #endif | |
675 | } | |
676 | ||
677 | #ifdef __linux__ | |
678 | ||
679 | struct convert_dir_context { | |
680 | char *buf; | |
681 | int prev_offset; | |
682 | int offset; | |
683 | int bs; | |
684 | }; | |
685 | ||
686 | /* | |
687 | * This function converts an ext2fs directory entry to the BSD format. | |
688 | * | |
689 | * Basically, it adds a null-character at the end of the name, recomputes the | |
690 | * size of the entry, and creates it in a temporary buffer | |
691 | */ | |
692 | static int | |
693 | convert_dir(struct ext2_dir_entry *dirent, int offset, int blocksize, char *buf, void *private) | |
694 | { | |
695 | struct convert_dir_context *p; | |
696 | struct direct *dp; | |
697 | int reclen; | |
698 | ||
699 | p = (struct convert_dir_context *)private; | |
700 | ||
701 | reclen = EXT2_DIR_REC_LEN(dirent->name_len + 1); | |
702 | if (((p->offset + reclen - 1) / p->bs) != (p->offset / p->bs)) { | |
703 | dp = (struct direct *)(p->buf + p->prev_offset); | |
704 | dp->d_reclen += p->bs - (p->offset % p->bs); | |
705 | p->offset += p->bs - (p->offset % p->bs); | |
706 | } | |
707 | ||
708 | dp = (struct direct *)(p->buf + p->offset); | |
709 | dp->d_ino = dirent->inode; | |
710 | dp->d_reclen = reclen; | |
711 | dp->d_type = 0; | |
712 | dp->d_namlen = dirent->name_len; | |
713 | strncpy(dp->d_name, dirent->name, dirent->name_len); | |
714 | dp->d_name[dp->d_namlen] = '\0'; | |
715 | p->prev_offset = p->offset; | |
716 | p->offset += reclen; | |
717 | ||
718 | return 0; | |
719 | } | |
720 | ||
721 | /* | |
722 | * Dump pass 3 | |
723 | * | |
724 | * Dumps a directory to tape after converting it to the BSD format | |
725 | */ | |
726 | void | |
727 | dumpdirino(struct dinode *dp, ino_t ino) | |
728 | { | |
729 | fsizeT size; | |
730 | char buf[TP_BSIZE]; | |
731 | struct old_bsd_inode obi; | |
732 | struct convert_dir_context cdc; | |
733 | errcode_t retval; | |
734 | struct ext2_dir_entry *de; | |
735 | fsizeT dir_size; | |
736 | ||
737 | if (newtape) { | |
738 | newtape = 0; | |
739 | dumpmap(dumpinomap, TS_BITS, ino); | |
740 | } | |
741 | CLRINO(ino, dumpinomap); | |
742 | ||
743 | /* | |
744 | * Convert the directory to the BSD format | |
745 | */ | |
746 | /* Allocate a buffer for the conversion (twice the size of the | |
747 | ext2fs directory to avoid problems ;-) */ | |
748 | cdc.buf = (char *)malloc(dp->di_size * 2 * sizeof(char)); | |
749 | if (cdc.buf == NULL) | |
750 | err(1, "Cannot allocate buffer to convert directory #%lu\n", | |
751 | (unsigned long)ino); | |
752 | cdc.offset = 0; | |
753 | cdc.prev_offset = 0; | |
754 | cdc.bs = MIN(DIRBLKSIZ, TP_BSIZE); | |
755 | /* Do the conversion */ | |
756 | retval = ext2fs_dir_iterate(fs, ino, 0, NULL, convert_dir, (void *)&cdc); | |
757 | if (retval) { | |
758 | com_err(disk, retval, "while converting directory #%ld\n", ino); | |
759 | exit(X_ABORT); | |
760 | } | |
761 | /* Fix the last entry */ | |
762 | if ((cdc.offset % cdc.bs) != 0) { | |
763 | de = (struct ext2_dir_entry *)(cdc.buf + cdc.prev_offset); | |
764 | de->rec_len += cdc.bs - (cdc.offset % cdc.bs); | |
765 | cdc.offset += cdc.bs - (cdc.offset % cdc.bs); | |
766 | } | |
767 | ||
768 | dir_size = cdc.offset; | |
769 | ||
770 | #ifdef __linux__ | |
771 | memset(&obi, 0, sizeof(obi)); | |
772 | obi.di_mode = dp->di_mode; | |
773 | obi.di_uid = dp->di_uid; | |
774 | obi.di_gid = dp->di_gid; | |
775 | obi.di_qsize.v = dir_size; /* (u_quad_t)dp->di_size; */ | |
776 | obi.di_atime = dp->di_atime; | |
777 | obi.di_mtime = dp->di_mtime; | |
778 | obi.di_ctime = dp->di_ctime; | |
779 | obi.di_nlink = dp->di_nlink; | |
780 | obi.di_blocks = dp->di_blocks; | |
781 | obi.di_flags = dp->di_flags; | |
782 | obi.di_gen = dp->di_gen; | |
783 | memmove(&obi.di_db, &dp->di_db, (NDADDR + NIADDR) * sizeof(daddr_t)); | |
784 | if (dp->di_file_acl || dp->di_dir_acl) | |
785 | warn("ACLs in inode #%ld won't be dumped", ino); | |
786 | memmove(&spcl.c_dinode, &obi, sizeof(obi)); | |
787 | #else /* __linux__ */ | |
788 | spcl.c_dinode = *dp; | |
789 | #endif /* __linux__ */ | |
790 | spcl.c_type = TS_INODE; | |
791 | spcl.c_count = 0; | |
792 | switch (dp->di_mode & S_IFMT) { | |
793 | ||
794 | case 0: | |
795 | /* | |
796 | * Freed inode. | |
797 | */ | |
798 | return; | |
799 | ||
800 | case S_IFDIR: | |
801 | if (dir_size > 0) | |
802 | break; | |
803 | msg("Warning: size of directory inode #%d is <= 0 (%d)!\n", | |
804 | ino, dir_size); | |
805 | return; | |
806 | ||
807 | default: | |
808 | msg("Warning: dumpdirino called with file type 0%o (inode #%d)\n", | |
809 | dp->di_mode & IFMT, ino); | |
810 | return; | |
811 | } | |
812 | for (size = 0; size < dir_size; size += TP_BSIZE) { | |
813 | spcl.c_addr[0] = 1; | |
814 | spcl.c_count = 1; | |
815 | writeheader(ino); | |
816 | memmove(buf, cdc.buf + size, TP_BSIZE); | |
817 | writerec(buf, 0); | |
818 | spcl.c_type = TS_ADDR; | |
819 | } | |
820 | ||
821 | (void)free(cdc.buf); | |
822 | } | |
823 | #endif /* __linux__ */ | |
824 | ||
825 | #ifndef __linux__ | |
826 | /* | |
827 | * Read indirect blocks, and pass the data blocks to be dumped. | |
828 | */ | |
829 | static void | |
830 | dmpindir(ino_t ino, daddr_t blk, int ind_level, fsizeT *size) | |
831 | { | |
832 | int i, cnt; | |
833 | #ifdef __linux__ | |
834 | int max; | |
835 | blk_t *swapme; | |
836 | #endif | |
837 | daddr_t idblk[MAXNINDIR]; | |
838 | ||
839 | if (blk != 0) { | |
840 | bread(fsbtodb(sblock, blk), (char *)idblk, (int) sblock->fs_bsize); | |
841 | #ifdef __linux__ | |
842 | /* | |
843 | * My RedHat 4.0 system doesn't have these flags; I haven't | |
844 | * upgraded e2fsprogs yet | |
845 | */ | |
846 | #if defined(EXT2_FLAG_SWAP_BYTES) | |
847 | if ((fs->flags & EXT2_FLAG_SWAP_BYTES) || | |
848 | (fs->flags & EXT2_FLAG_SWAP_BYTES_READ)) { | |
849 | #endif | |
850 | max = sblock->fs_bsize >> 2; | |
851 | swapme = (blk_t *) idblk; | |
852 | for (i = 0; i < max; i++, swapme++) | |
853 | *swapme = swab32(*swapme); | |
854 | #if defined(EXT2_FLAG_SWAP_BYTES) | |
855 | } | |
856 | #endif | |
857 | #endif | |
858 | else | |
859 | memset(idblk, 0, (int)sblock->fs_bsize); | |
860 | if (ind_level <= 0) { | |
861 | if (*size < NINDIR(sblock) * sblock->fs_bsize) | |
862 | cnt = howmany(*size, sblock->fs_fsize); | |
863 | else | |
864 | #ifdef __linux__ | |
865 | cnt = NINDIR(sblock) * EXT2_FRAGS_PER_BLOCK(fs->super); | |
866 | #else | |
867 | cnt = NINDIR(sblock) * sblock->fs_frag; | |
868 | #endif | |
869 | *size -= NINDIR(sblock) * sblock->fs_bsize; | |
870 | blksout(&idblk[0], cnt, ino); | |
871 | return; | |
872 | } | |
873 | ind_level--; | |
874 | for (i = 0; i < NINDIR(sblock); i++) { | |
875 | dmpindir(ino, idblk[i], ind_level, size); | |
876 | if (*size <= 0) | |
877 | return; | |
878 | } | |
879 | } | |
880 | #endif | |
881 | ||
882 | /* | |
883 | * Collect up the data into tape record sized buffers and output them. | |
884 | */ | |
885 | void | |
886 | blksout(daddr_t *blkp, int frags, ino_t ino) | |
887 | { | |
888 | register daddr_t *bp; | |
889 | int i, j, count, blks, tbperdb; | |
890 | ||
891 | blks = howmany(frags * sblock->fs_fsize, TP_BSIZE); | |
892 | tbperdb = sblock->fs_bsize >> tp_bshift; | |
893 | for (i = 0; i < blks; i += TP_NINDIR) { | |
894 | if (i + TP_NINDIR > blks) | |
895 | count = blks; | |
896 | else | |
897 | count = i + TP_NINDIR; | |
898 | for (j = i; j < count; j++) | |
899 | if (blkp[j / tbperdb] != 0) | |
900 | spcl.c_addr[j - i] = 1; | |
901 | else | |
902 | spcl.c_addr[j - i] = 0; | |
903 | spcl.c_count = count - i; | |
904 | writeheader(ino); | |
905 | bp = &blkp[i / tbperdb]; | |
906 | for (j = i; j < count; j += tbperdb, bp++) { | |
907 | if (*bp != 0) { | |
908 | if (j + tbperdb <= count) | |
909 | dumpblock(*bp, (int)sblock->fs_bsize); | |
910 | else | |
911 | dumpblock(*bp, (count - j) * TP_BSIZE); | |
912 | } | |
913 | } | |
914 | spcl.c_type = TS_ADDR; | |
915 | } | |
916 | } | |
917 | ||
918 | /* | |
919 | * Dump a map to the tape. | |
920 | */ | |
921 | void | |
922 | dumpmap(char *map, int type, ino_t ino) | |
923 | { | |
924 | register int i; | |
925 | char *cp; | |
926 | ||
927 | spcl.c_type = type; | |
928 | spcl.c_count = howmany(mapsize * sizeof(char), TP_BSIZE); | |
929 | writeheader(ino); | |
930 | for (i = 0, cp = map; i < spcl.c_count; i++, cp += TP_BSIZE) | |
931 | writerec(cp, 0); | |
932 | } | |
933 | ||
934 | /* | |
935 | * Write a header record to the dump tape. | |
936 | */ | |
937 | void | |
938 | writeheader(ino_t ino) | |
939 | { | |
940 | #ifdef __linux__ | |
941 | register __s32 sum, cnt, *lp; | |
942 | #else | |
943 | register int32_t sum, cnt, *lp; | |
944 | #endif | |
945 | ||
946 | spcl.c_inumber = ino; | |
947 | spcl.c_magic = NFS_MAGIC; | |
948 | spcl.c_checksum = 0; | |
949 | #ifdef __linux__ | |
950 | lp = (__s32 *)&spcl; | |
951 | #else | |
952 | lp = (int32_t *)&spcl; | |
953 | #endif | |
954 | sum = 0; | |
955 | #ifdef __linux__ | |
956 | cnt = sizeof(union u_spcl) / (4 * sizeof(__s32)); | |
957 | #else | |
958 | cnt = sizeof(union u_spcl) / (4 * sizeof(int32_t)); | |
959 | #endif | |
960 | while (--cnt >= 0) { | |
961 | sum += *lp++; | |
962 | sum += *lp++; | |
963 | sum += *lp++; | |
964 | sum += *lp++; | |
965 | } | |
966 | spcl.c_checksum = CHECKSUM - sum; | |
967 | writerec((char *)&spcl, 1); | |
968 | } | |
969 | ||
970 | #ifdef __linux__ | |
971 | struct dinode * | |
972 | getino(ino_t inum) | |
973 | { | |
974 | static struct dinode dinode; | |
975 | ||
976 | curino = inum; | |
977 | ext2fs_read_inode(fs, inum, (struct ext2_inode *) &dinode); | |
978 | return &dinode; | |
979 | } | |
980 | #else /* __linux__ */ | |
981 | struct dinode * | |
982 | getino(ino_t inum) | |
983 | { | |
984 | static daddr_t minino, maxino; | |
985 | static struct dinode inoblock[MAXINOPB]; | |
986 | ||
987 | curino = inum; | |
988 | if (inum >= minino && inum < maxino) | |
989 | return (&inoblock[inum - minino]); | |
990 | bread(fsbtodb(sblock, ino_to_fsba(sblock, inum)), (char *)inoblock, | |
991 | (int)sblock->fs_bsize); | |
992 | minino = inum - (inum % INOPB(sblock)); | |
993 | maxino = minino + INOPB(sblock); | |
994 | return (&inoblock[inum - minino]); | |
995 | } | |
996 | #endif /* __linux__ */ | |
997 | ||
998 | /* | |
999 | * Read a chunk of data from the disk. | |
1000 | * Try to recover from hard errors by reading in sector sized pieces. | |
1001 | * Error recovery is attempted at most BREADEMAX times before seeking | |
1002 | * consent from the operator to continue. | |
1003 | */ | |
1004 | int breaderrors = 0; | |
1005 | #define BREADEMAX 32 | |
1006 | ||
1007 | void | |
1008 | bread(daddr_t blkno, char *buf, int size) | |
1009 | { | |
1010 | int cnt, i; | |
1011 | extern int errno; | |
1012 | ||
1013 | loop: | |
1014 | #ifdef __linux__ | |
1015 | if (ext2fs_llseek(diskfd, (((ext2_loff_t)blkno) << dev_bshift), 0) != | |
1016 | (((ext2_loff_t)blkno) << dev_bshift)) | |
1017 | #else | |
1018 | if (lseek(diskfd, ((off_t)blkno << dev_bshift), 0) != | |
1019 | ((off_t)blkno << dev_bshift)) | |
1020 | #endif | |
1021 | msg("bread: lseek fails\n"); | |
1022 | if ((cnt = read(diskfd, buf, size)) == size) | |
1023 | return; | |
1024 | if (blkno + (size / dev_bsize) > fsbtodb(sblock, sblock->fs_size)) { | |
1025 | /* | |
1026 | * Trying to read the final fragment. | |
1027 | * | |
1028 | * NB - dump only works in TP_BSIZE blocks, hence | |
1029 | * rounds `dev_bsize' fragments up to TP_BSIZE pieces. | |
1030 | * It should be smarter about not actually trying to | |
1031 | * read more than it can get, but for the time being | |
1032 | * we punt and scale back the read only when it gets | |
1033 | * us into trouble. (mkm 9/25/83) | |
1034 | */ | |
1035 | size -= dev_bsize; | |
1036 | goto loop; | |
1037 | } | |
1038 | if (cnt == -1) | |
1039 | msg("read error from %s: %s: [block %d]: count=%d\n", | |
1040 | disk, strerror(errno), blkno, size); | |
1041 | else | |
1042 | msg("short read error from %s: [block %d]: count=%d, got=%d\n", | |
1043 | disk, blkno, size, cnt); | |
1044 | if (++breaderrors > BREADEMAX) { | |
1045 | msg("More than %d block read errors from %d\n", | |
1046 | BREADEMAX, disk); | |
1047 | broadcast("DUMP IS AILING!\n"); | |
1048 | msg("This is an unrecoverable error.\n"); | |
1049 | if (!query("Do you want to attempt to continue?")){ | |
1050 | dumpabort(0); | |
1051 | /*NOTREACHED*/ | |
1052 | } else | |
1053 | breaderrors = 0; | |
1054 | } | |
1055 | /* | |
1056 | * Zero buffer, then try to read each sector of buffer separately. | |
1057 | */ | |
1058 | memset(buf, 0, size); | |
1059 | for (i = 0; i < size; i += dev_bsize, buf += dev_bsize, blkno++) { | |
1060 | #ifdef __linux__ | |
1061 | if (ext2fs_llseek(diskfd, (((ext2_loff_t)blkno) << dev_bshift), 0) != | |
1062 | (((ext2_loff_t)blkno) << dev_bshift)) | |
1063 | #else | |
1064 | if (lseek(diskfd, ((off_t)blkno << dev_bshift), 0) != | |
1065 | ((off_t)blkno << dev_bshift)) | |
1066 | #endif | |
1067 | msg("bread: lseek2 fails!\n"); | |
1068 | if ((cnt = read(diskfd, buf, (int)dev_bsize)) == dev_bsize) | |
1069 | continue; | |
1070 | if (cnt == -1) { | |
1071 | msg("read error from %s: %s: [sector %d]: count=%d\n", | |
1072 | disk, strerror(errno), blkno, dev_bsize); | |
1073 | continue; | |
1074 | } | |
1075 | msg("short read error from %s: [sector %d]: count=%d, got=%d\n", | |
1076 | disk, blkno, dev_bsize, cnt); | |
1077 | } | |
1078 | } |