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>, 1999-2000
9 * Copyright (c) 1980, 1988, 1991, 1993
10 * The Regents of the University of California. All rights reserved.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
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.
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
42 static const char rcsid[] =
43 "$Id: traverse.c,v 1.15 2000/02/04 20:22:21 stelian Exp $";
46 #include <sys/param.h>
49 #include <linux/ext2_fs.h>
50 #include <bsdcompat.h>
51 #include <compaterr.h>
53 #define swab32(x) ext2fs_swab32(x)
57 #include <sys/vnode.h>
60 #include <ufs/fsdir.h>
61 #include <ufs/inode.h>
63 #include <ufs/ufs/dir.h>
64 #include <ufs/ufs/dinode.h>
65 #include <ufs/ffs/fs.h>
67 #endif /* __linux__ */
69 #include <protocols/dumprestore.h>
79 #include <ext2fs/ext2fs.h>
84 #define HASDUMPEDFILE 0x1
85 #define HASSUBDIRS 0x2
88 typedef quad_t fsizeT;
94 static int searchdir __P((struct ext2_dir_entry *dp, int offset,
95 int blocksize, char *buf, void *private));
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));
101 static void mapfileino __P((ino_t ino, long *tapesize, int *dirskipped));
103 /* #define EXT3_FEATURE_INCOMPAT_RECOVER */
105 int dump_fs_open(const char *disk, ext2_filsys *fs)
110 #ifdef EXT3_FEATURE_INCOMPAT_RECOVER
111 retval = ext2fs_open(disk, EXT2_FLAG_FORCE, 0, 0, unix_io_manager, fs);
113 retval = ext2fs_open(disk, 0, 0, 0, unix_io_manager, fs);
116 s = (struct ext2fs_sb *) (*fs)->super;
117 if ((s->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP) ||
118 #ifdef EXT3_FEATURE_INCOMPAT_RECOVER
119 (s->s_feature_incompat & ~(EXT3_FEATURE_INCOMPAT_RECOVER | EXT2_LIB_FEATURE_INCOMPAT_SUPP))) {
121 (s->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP)) {
123 retval = EXT2_ET_UNSUPP_FEATURE;
125 else if (s->s_feature_ro_compat & ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP) {
126 retval = EXT2_ET_RO_UNSUPP_FEATURE;
133 * This is an estimation of the number of TP_BSIZE blocks in the file.
134 * It estimates the number of blocks in files with holes by assuming
135 * that all of the blocks accounted for by di_blocks are data blocks
136 * (when some of the blocks are usually used for indirect pointers);
137 * hence the estimate may be high.
140 blockest(struct dinode *dp)
142 long blkest, sizeest;
145 * dp->di_size is the size of the file in bytes.
146 * dp->di_blocks stores the number of sectors actually in the file.
147 * If there are more sectors than the size would indicate, this just
148 * means that there are indirect blocks in the file or unused
149 * sectors in the last file block; we can safely ignore these
150 * (blkest = sizeest below).
151 * If the file is bigger than the number of sectors would indicate,
152 * then the file has holes in it. In this case we must use the
153 * block count to estimate the number of data blocks used, but
154 * we use the actual size for estimating the number of indirect
155 * dump blocks (sizeest vs. blkest in the indirect block
158 blkest = howmany(dbtob(dp->di_blocks), TP_BSIZE);
159 sizeest = howmany(dp->di_size, TP_BSIZE);
160 if (blkest > sizeest)
163 if (dp->di_size > fs->blocksize * NDADDR) {
164 /* calculate the number of indirect blocks on the dump tape */
166 howmany(sizeest - NDADDR * fs->blocksize / TP_BSIZE,
170 if (dp->di_size > sblock->fs_bsize * NDADDR) {
171 /* calculate the number of indirect blocks on the dump tape */
173 howmany(sizeest - NDADDR * sblock->fs_bsize / TP_BSIZE,
180 /* Auxiliary macro to pick up files changed since previous dump. */
181 #define CHANGEDSINCE(dp, t) \
182 ((dp)->di_mtime >= (t) || (dp)->di_ctime >= (t))
184 /* The WANTTODUMP macro decides whether a file should be dumped. */
186 #define WANTTODUMP(dp) \
187 (CHANGEDSINCE(dp, spcl.c_ddate) && \
188 (nonodump || ((dp)->di_flags & UF_NODUMP) != UF_NODUMP))
190 #define WANTTODUMP(dp) CHANGEDSINCE(dp, spcl.c_ddate)
193 extern ino_t iexclude_list[IEXCLUDE_MAXNUM]; /* the inode exclude list */
194 extern int iexclude_num; /* number of elements in the list */
197 * Determine if given inode should be dumped
200 mapfileino(ino_t ino, long *tapesize, int *dirskipped)
203 register struct dinode *dp;
206 * Skip inode if we've already marked it for dumping
208 if (TSTINO(ino, usedinomap))
211 if ((mode = (dp->di_mode & IFMT)) == 0)
214 if (dp->di_nlink == 0 || dp->di_dtime != 0)
218 * Put all dirs in dumpdirmap, inodes that are to be dumped in the
219 * used map. All inode but dirs who have the nodump attribute go
222 SETINO(ino, usedinomap);
225 if(iexclude_num) { /* if there are inodes in the exclude list */
226 int idx; /* then check this inode against it */
227 for (idx=0; idx<iexclude_num; idx++) {
228 if (ino == iexclude_list[idx]) {
229 msg("Excluding inode number %d\n", ino);
230 return; /* if in list then skip */
236 SETINO(ino, dumpdirmap);
237 if (WANTTODUMP(dp)) {
238 SETINO(ino, dumpinomap);
239 if (mode != IFREG && mode != IFDIR && mode != IFLNK)
242 *tapesize += blockest(dp);
247 if (!nonodump && (dp->di_flags & UF_NODUMP))
248 CLRINO(ino, usedinomap);
257 * Walk the inode list for a filesystem to find all allocated inodes
258 * that have been modified since the previous dump time. Also, find all
259 * the directories in the filesystem.
262 mapfiles(ino_t maxino, long *tapesize)
265 int anydirskipped = 0;
267 for (ino = ROOTINO; ino < maxino; ino++)
268 mapfileino(ino, tapesize, &anydirskipped);
271 * Restore gets very upset if the root is not dumped,
272 * so ensure that it always is dumped.
274 SETINO(ROOTINO, dumpinomap);
275 return (anydirskipped);
279 struct mapfile_context {
285 mapfilesindir(struct ext2_dir_entry *dirent, int offset, int blocksize, char *buf, void *private)
287 register struct dinode *dp;
290 struct mapfile_context *mfc;
294 mfc = (struct mapfile_context *)private;
296 mapfileino(dirent->inode, mfc->tapesize, mfc->anydirskipped);
298 dp = getino(dirent->inode);
299 mode = dp->di_mode & IFMT;
300 if (mode == IFDIR && dp->di_nlink != 0 && dp->di_dtime == 0) {
301 if ((dirent->name[0] != '.' || ( dirent->name_len & 0xFF ) != 1) &&
302 (dirent->name[0] != '.' || dirent->name[1] != '.' ||
303 ( dirent->name_len & 0xFF ) != 2)) {
304 retval = ext2fs_dir_iterate(fs, ino, 0, NULL,
305 mapfilesindir, private);
316 * Walk the inode list for a filesystem to find all allocated inodes
317 * that have been modified since the previous dump time. Also, find all
318 * the directories in the filesystem.
321 mapfilesfromdir(ino_t maxino, long *tapesize, char *directory)
324 struct mapfile_context mfc;
326 char dir_name [MAXPATHLEN];
327 int i, anydirskipped = 0;
330 * Mark every directory in the path as being dumped
332 for (i = 0; i < strlen (directory); i++) {
333 if (directory[i] == '/') {
334 strncpy (dir_name, directory, i);
336 retval = ext2fs_namei(fs, ROOTINO, ROOTINO, dir_name,
339 com_err(disk, retval, "while translating %s",
343 mapfileino(dir_ino, tapesize, &anydirskipped);
347 * Mark the final directory
349 retval = ext2fs_namei(fs, ROOTINO, ROOTINO, directory, &dir_ino);
351 com_err(disk, retval, "while translating %s", directory);
354 mapfileino(dir_ino, tapesize, &anydirskipped);
356 mfc.tapesize = tapesize;
357 mfc.anydirskipped = &anydirskipped;
358 retval = ext2fs_dir_iterate(fs, dir_ino, 0, NULL, mapfilesindir,
362 com_err(disk, retval, "while mapping files in %s", directory);
366 * Ensure that the root inode actually appears in the file list
369 mapfileino(ROOTINO, tapesize, &anydirskipped);
371 * Restore gets very upset if the root is not dumped,
372 * so ensure that it always is dumped.
374 SETINO(ROOTINO, dumpinomap);
375 return anydirskipped;
380 struct mapdirs_context {
390 * Scan each directory on the filesystem to see if it has any modified
391 * files in it. If it does, and has not already been added to the dump
392 * list (because it was itself modified), then add it. If a directory
393 * has not been modified itself, contains no modified files and has no
394 * subdirectories, then it can be deleted from the dump list and from
395 * the list of directories. By deleting it from the list of directories,
396 * its parent may now qualify for the same treatment on this or a later
397 * pass using this algorithm.
400 mapdirs(ino_t maxino, long *tapesize)
402 register struct dinode *dp;
410 struct mapdirs_context mdc;
412 int ret, change = 0, nodump;
414 isdir = 0; /* XXX just to get gcc to shut up */
415 for (map = dumpdirmap, ino = 1; ino < maxino; ino++) {
416 if (((ino - 1) % NBBY) == 0) /* map is offset by 1 */
421 * If dir has been removed from the used map, it's either
422 * because it had the nodump flag, or it herited it from
423 * its parent. A directory can't be in dumpinomap if not
424 * in usedinomap, but we have to go through it anyway
425 * to propagate the nodump attribute.
427 nodump = (TSTINO(ino, usedinomap) == 0);
428 if ((isdir & 1) == 0 ||
429 (TSTINO(ino, dumpinomap) && nodump == 0))
436 mdc.tapesize = tapesize;
437 ext2fs_dir_iterate(fs, ino, 0, NULL, searchdir, (void *) &mdc);
438 #else /* __linux__ */
439 filesize = dp->di_size;
440 for (ret = 0, i = 0; filesize > 0 && i < NDADDR; i++) {
441 if (dp->di_db[i] != 0)
442 ret |= searchdir(ino, dp->di_db[i],
443 (long)dblksize(sblock, dp, i),
445 if (ret & HASDUMPEDFILE)
448 filesize -= sblock->fs_bsize;
450 for (i = 0; filesize > 0 && i < NIADDR; i++) {
451 if (dp->di_ib[i] == 0)
453 ret |= dirindir(ino, dp->di_ib[i], i, &filesize);
455 #endif /* __linux__ */
456 if (ret & HASDUMPEDFILE) {
457 SETINO(ino, dumpinomap);
458 *tapesize += blockest(dp);
463 if (ret & HASSUBDIRS)
464 change = 1; /* subdirs have inherited nodump */
465 CLRINO(ino, dumpdirmap);
466 } else if ((ret & HASSUBDIRS) == 0) {
467 if (!TSTINO(ino, dumpinomap)) {
468 CLRINO(ino, dumpdirmap);
478 * Read indirect blocks, and pass the data blocks to be searched
479 * as directories. Quit as soon as any entry is found that will
480 * require the directory to be dumped.
483 dirindir(ino_t ino, daddr_t blkno, int ind_level, long *filesize)
487 daddr_t idblk[MAXNINDIR];
489 bread(fsbtodb(sblock, blkno), (char *)idblk, (int)sblock->fs_bsize);
490 if (ind_level <= 0) {
491 for (i = 0; *filesize > 0 && i < NINDIR(sblock); i++) {
494 ret |= searchdir(ino, blkno, sblock->fs_bsize,
496 if (ret & HASDUMPEDFILE)
499 *filesize -= sblock->fs_bsize;
504 for (i = 0; *filesize > 0 && i < NINDIR(sblock); i++) {
507 ret |= dirindir(ino, blkno, ind_level, filesize);
511 #endif /* !__linux__ */
514 * Scan a disk block containing directory information looking to see if
515 * any of the entries are on the dump list and to see if the directory
516 * contains any subdirectories.
520 searchdir(struct ext2_dir_entry *dp, int offset, int blocksize, char *buf, void *private)
522 struct mapdirs_context *mdc;
527 mdc = (struct mapdirs_context *)private;
529 tapesize = mdc->tapesize;
533 if (dp->name[0] == '.') {
534 if (( dp->name_len & 0xFF ) == 1)
536 if (dp->name[1] == '.' && ( dp->name_len & 0xFF ) == 2)
540 ip = getino(dp->inode);
541 if (TSTINO(dp->inode, dumpinomap)) {
542 CLRINO(dp->inode, dumpinomap);
543 CLRINO(dp->inode, usedinomap);
544 *tapesize -= blockest(ip);
546 /* Add dir back to the dir map, to propagate nodump */
547 if ((ip->di_mode & IFMT) == IFDIR) {
548 SETINO(dp->inode, dumpdirmap);
552 if (TSTINO(dp->inode, dumpinomap)) {
553 *ret |= HASDUMPEDFILE;
554 if (*ret & HASSUBDIRS)
557 if (TSTINO(dp->inode, dumpdirmap)) {
559 if (*ret & HASDUMPEDFILE)
566 #else /* __linux__ */
569 searchdir(ino_t ino, daddr_t blkno, long size, long filesize)
571 register struct direct *dp;
572 register long loc, ret = 0;
575 bread(fsbtodb(sblock, blkno), dblk, (int)size);
578 for (loc = 0; loc < size; ) {
579 dp = (struct direct *)(dblk + loc);
580 if (dp->d_reclen == 0) {
581 msg("corrupted directory, inumber %d\n", ino);
587 if (dp->d_name[0] == '.') {
588 if (dp->d_name[1] == '\0')
590 if (dp->d_name[1] == '.' && dp->d_name[2] == '\0')
593 if (TSTINO(dp->d_ino, dumpinomap)) {
594 ret |= HASDUMPEDFILE;
595 if (ret & HASSUBDIRS)
598 if (TSTINO(dp->d_ino, dumpdirmap)) {
600 if (ret & HASDUMPEDFILE)
606 #endif /* __linux__ */
610 struct block_context {
619 * Dump a block to the tape
622 dumponeblock(ext2_filsys fs, blk_t *blocknr, int blockcnt, void *private)
624 struct block_context *p;
627 if (blockcnt < NDADDR)
629 p = (struct block_context *)private;
630 for (i = p->next_block; i < blockcnt; i++) {
631 p->buf[p->cnt++] = 0;
632 if (p->cnt == p->max) {
633 blksout (p->buf, p->cnt, p->ino);
637 p->buf[p->cnt++] = *blocknr;
638 if (p->cnt == p->max) {
639 blksout (p->buf, p->cnt, p->ino);
642 p->next_block = blockcnt + 1;
648 * Dump passes 3 and 4.
650 * Dump the contents of an inode to tape.
653 dumpino(struct dinode *dp, ino_t ino)
658 struct old_bsd_inode obi;
660 struct block_context bc;
667 dumpmap(dumpinomap, TS_BITS, ino);
669 CLRINO(ino, dumpinomap);
671 memset(&obi, 0, sizeof(obi));
672 obi.di_mode = dp->di_mode;
673 obi.di_uid = dp->di_uid;
674 obi.di_gid = dp->di_gid;
675 obi.di_qsize.v = (u_quad_t)dp->di_size;
676 obi.di_atime = dp->di_atime;
677 obi.di_mtime = dp->di_mtime;
678 obi.di_ctime = dp->di_ctime;
679 obi.di_nlink = dp->di_nlink;
680 obi.di_blocks = dp->di_blocks;
681 obi.di_flags = dp->di_flags;
682 obi.di_gen = dp->di_gen;
683 memmove(&obi.di_db, &dp->di_db, (NDADDR + NIADDR) * sizeof(daddr_t));
684 if (dp->di_file_acl || dp->di_dir_acl)
685 warn("ACLs in inode #%ld won't be dumped", (long)ino);
686 memmove(&spcl.c_dinode, &obi, sizeof(obi));
687 #else /* __linux__ */
689 #endif /* __linux__ */
690 spcl.c_type = TS_INODE;
692 switch (dp->di_mode & S_IFMT) {
702 msg("Warning: dumpino called on a directory (ino %d)\n", ino);
708 * Check for short symbolic link.
711 if (dp->di_size > 0 &&
712 dp->di_size < EXT2_N_BLOCKS * sizeof (daddr_t)) {
716 memmove(buf, dp->di_db, (u_long)dp->di_size);
717 buf[dp->di_size] = '\0';
721 #endif /* __linux__ */
723 if (dp->di_size > 0 &&
724 dp->di_size < sblock->fs_maxsymlinklen) {
728 memmove(buf, dp->di_shortlink, (u_long)dp->di_size);
729 buf[dp->di_size] = '\0';
752 msg("Warning: undefined file type 0%o\n", dp->di_mode & IFMT);
755 if (dp->di_size > NDADDR * sblock->fs_bsize)
757 cnt = NDADDR * EXT2_FRAGS_PER_BLOCK(fs->super);
759 cnt = NDADDR * sblock->fs_frag;
762 cnt = howmany(dp->di_size, sblock->fs_fsize);
763 blksout(&dp->di_db[0], cnt, ino);
764 if ((size = dp->di_size - NDADDR * sblock->fs_bsize) <= 0)
767 bc.max = NINDIR(sblock) * EXT2_FRAGS_PER_BLOCK(fs->super);
768 bc.buf = (int *)malloc (bc.max * sizeof (int));
771 bc.next_block = NDADDR;
773 ext2fs_block_iterate (fs, ino, 0, NULL, dumponeblock, (void *)&bc);
775 blksout (bc.buf, bc.cnt, bc.ino);
779 for (ind_level = 0; ind_level < NIADDR; ind_level++) {
780 dmpindir(ino, dp->di_ib[ind_level], ind_level, &size);
789 struct convert_dir_context {
797 * This function converts an ext2fs directory entry to the BSD format.
799 * Basically, it adds a null-character at the end of the name, recomputes the
800 * size of the entry, and creates it in a temporary buffer
803 convert_dir(struct ext2_dir_entry *dirent, int offset, int blocksize, char *buf, void *private)
805 struct convert_dir_context *p;
809 p = (struct convert_dir_context *)private;
811 reclen = EXT2_DIR_REC_LEN((dirent->name_len & 0xFF) + 1);
812 if (((p->offset + reclen - 1) / p->bs) != (p->offset / p->bs)) {
813 dp = (struct direct *)(p->buf + p->prev_offset);
814 dp->d_reclen += p->bs - (p->offset % p->bs);
815 p->offset += p->bs - (p->offset % p->bs);
818 dp = (struct direct *)(p->buf + p->offset);
819 dp->d_ino = dirent->inode;
820 dp->d_reclen = reclen;
822 dp->d_namlen = dirent->name_len & 0xFF;
823 strncpy(dp->d_name, dirent->name, dp->d_namlen);
824 dp->d_name[dp->d_namlen] = '\0';
825 p->prev_offset = p->offset;
834 * Dumps a directory to tape after converting it to the BSD format
837 dumpdirino(struct dinode *dp, ino_t ino)
841 struct old_bsd_inode obi;
842 struct convert_dir_context cdc;
844 struct ext2_dir_entry *de;
849 dumpmap(dumpinomap, TS_BITS, ino);
851 CLRINO(ino, dumpinomap);
854 * Convert the directory to the BSD format
856 /* Allocate a buffer for the conversion (twice the size of the
857 ext2fs directory to avoid problems ;-) */
858 cdc.buf = (char *)malloc(dp->di_size * 2 * sizeof(char));
860 err(1, "Cannot allocate buffer to convert directory #%lu\n",
864 cdc.bs = MIN(DIRBLKSIZ, TP_BSIZE);
865 /* Do the conversion */
866 retval = ext2fs_dir_iterate(fs, ino, 0, NULL, convert_dir, (void *)&cdc);
868 com_err(disk, retval, "while converting directory #%ld\n", (long)ino);
871 /* Fix the last entry */
872 if ((cdc.offset % cdc.bs) != 0) {
873 de = (struct ext2_dir_entry *)(cdc.buf + cdc.prev_offset);
874 de->rec_len += cdc.bs - (cdc.offset % cdc.bs);
875 cdc.offset += cdc.bs - (cdc.offset % cdc.bs);
878 dir_size = cdc.offset;
881 memset(&obi, 0, sizeof(obi));
882 obi.di_mode = dp->di_mode;
883 obi.di_uid = dp->di_uid;
884 obi.di_gid = dp->di_gid;
885 obi.di_qsize.v = dir_size; /* (u_quad_t)dp->di_size; */
886 obi.di_atime = dp->di_atime;
887 obi.di_mtime = dp->di_mtime;
888 obi.di_ctime = dp->di_ctime;
889 obi.di_nlink = dp->di_nlink;
890 obi.di_blocks = dp->di_blocks;
891 obi.di_flags = dp->di_flags;
892 obi.di_gen = dp->di_gen;
893 memmove(&obi.di_db, &dp->di_db, (NDADDR + NIADDR) * sizeof(daddr_t));
894 if (dp->di_file_acl || dp->di_dir_acl)
895 warn("ACLs in inode #%ld won't be dumped", (long)ino);
896 memmove(&spcl.c_dinode, &obi, sizeof(obi));
897 #else /* __linux__ */
899 #endif /* __linux__ */
900 spcl.c_type = TS_INODE;
902 switch (dp->di_mode & S_IFMT) {
913 msg("Warning: size of directory inode #%d is <= 0 (%d)!\n",
918 msg("Warning: dumpdirino called with file type 0%o (inode #%d)\n",
919 dp->di_mode & IFMT, ino);
922 for (size = 0; size < dir_size; size += TP_BSIZE) {
926 memmove(buf, cdc.buf + size, TP_BSIZE);
928 spcl.c_type = TS_ADDR;
933 #endif /* __linux__ */
937 * Read indirect blocks, and pass the data blocks to be dumped.
940 dmpindir(ino_t ino, daddr_t blk, int ind_level, fsizeT *size)
947 daddr_t idblk[MAXNINDIR];
950 bread(fsbtodb(sblock, blk), (char *)idblk, (int) sblock->fs_bsize);
953 * My RedHat 4.0 system doesn't have these flags; I haven't
954 * upgraded e2fsprogs yet
956 #if defined(EXT2_FLAG_SWAP_BYTES)
957 if ((fs->flags & EXT2_FLAG_SWAP_BYTES) ||
958 (fs->flags & EXT2_FLAG_SWAP_BYTES_READ)) {
960 max = sblock->fs_bsize >> 2;
961 swapme = (blk_t *) idblk;
962 for (i = 0; i < max; i++, swapme++)
963 *swapme = swab32(*swapme);
964 #if defined(EXT2_FLAG_SWAP_BYTES)
969 memset(idblk, 0, (int)sblock->fs_bsize);
970 if (ind_level <= 0) {
971 if (*size < NINDIR(sblock) * sblock->fs_bsize)
972 cnt = howmany(*size, sblock->fs_fsize);
975 cnt = NINDIR(sblock) * EXT2_FRAGS_PER_BLOCK(fs->super);
977 cnt = NINDIR(sblock) * sblock->fs_frag;
979 *size -= NINDIR(sblock) * sblock->fs_bsize;
980 blksout(&idblk[0], cnt, ino);
984 for (i = 0; i < NINDIR(sblock); i++) {
985 dmpindir(ino, idblk[i], ind_level, size);
993 * Collect up the data into tape record sized buffers and output them.
996 blksout(daddr_t *blkp, int frags, ino_t ino)
998 register daddr_t *bp;
999 int i, j, count, blks, tbperdb;
1001 blks = howmany(frags * sblock->fs_fsize, TP_BSIZE);
1002 tbperdb = sblock->fs_bsize >> tp_bshift;
1003 for (i = 0; i < blks; i += TP_NINDIR) {
1004 if (i + TP_NINDIR > blks)
1007 count = i + TP_NINDIR;
1008 for (j = i; j < count; j++)
1009 if (blkp[j / tbperdb] != 0)
1010 spcl.c_addr[j - i] = 1;
1012 spcl.c_addr[j - i] = 0;
1013 spcl.c_count = count - i;
1015 bp = &blkp[i / tbperdb];
1016 for (j = i; j < count; j += tbperdb, bp++) {
1018 if (j + tbperdb <= count)
1019 dumpblock(*bp, (int)sblock->fs_bsize);
1021 dumpblock(*bp, (count - j) * TP_BSIZE);
1024 spcl.c_type = TS_ADDR;
1029 * Dump a map to the tape.
1032 dumpmap(char *map, int type, ino_t ino)
1038 spcl.c_count = howmany(mapsize * sizeof(char), TP_BSIZE);
1040 for (i = 0, cp = map; i < spcl.c_count; i++, cp += TP_BSIZE)
1045 * Write a header record to the dump tape.
1048 writeheader(ino_t ino)
1051 register __s32 sum, cnt, *lp;
1053 register int32_t sum, cnt, *lp;
1056 spcl.c_inumber = ino;
1057 spcl.c_magic = NFS_MAGIC;
1058 spcl.c_checksum = 0;
1060 lp = (__s32 *)&spcl;
1062 lp = (int32_t *)&spcl;
1066 cnt = sizeof(union u_spcl) / (4 * sizeof(__s32));
1068 cnt = sizeof(union u_spcl) / (4 * sizeof(int32_t));
1070 while (--cnt >= 0) {
1076 spcl.c_checksum = CHECKSUM - sum;
1077 writerec((char *)&spcl, 1);
1084 static struct dinode dinode;
1087 ext2fs_read_inode(fs, inum, (struct ext2_inode *) &dinode);
1090 #else /* __linux__ */
1094 static daddr_t minino, maxino;
1095 static struct dinode inoblock[MAXINOPB];
1098 if (inum >= minino && inum < maxino)
1099 return (&inoblock[inum - minino]);
1100 bread(fsbtodb(sblock, ino_to_fsba(sblock, inum)), (char *)inoblock,
1101 (int)sblock->fs_bsize);
1102 minino = inum - (inum % INOPB(sblock));
1103 maxino = minino + INOPB(sblock);
1104 return (&inoblock[inum - minino]);
1106 #endif /* __linux__ */
1109 * Read a chunk of data from the disk.
1110 * Try to recover from hard errors by reading in sector sized pieces.
1111 * Error recovery is attempted at most BREADEMAX times before seeking
1112 * consent from the operator to continue.
1114 int breaderrors = 0;
1115 #define BREADEMAX 32
1118 bread(daddr_t blkno, char *buf, int size)
1125 if (ext2fs_llseek(diskfd, (((ext2_loff_t)blkno) << dev_bshift), 0) !=
1126 (((ext2_loff_t)blkno) << dev_bshift))
1128 if (lseek(diskfd, ((off_t)blkno << dev_bshift), 0) !=
1129 ((off_t)blkno << dev_bshift))
1131 msg("bread: lseek fails\n");
1132 if ((cnt = read(diskfd, buf, size)) == size)
1134 if (blkno + (size / dev_bsize) > fsbtodb(sblock, sblock->fs_size)) {
1136 * Trying to read the final fragment.
1138 * NB - dump only works in TP_BSIZE blocks, hence
1139 * rounds `dev_bsize' fragments up to TP_BSIZE pieces.
1140 * It should be smarter about not actually trying to
1141 * read more than it can get, but for the time being
1142 * we punt and scale back the read only when it gets
1143 * us into trouble. (mkm 9/25/83)
1149 msg("read error from %s: %s: [block %d]: count=%d\n",
1150 disk, strerror(errno), blkno, size);
1152 msg("short read error from %s: [block %d]: count=%d, got=%d\n",
1153 disk, blkno, size, cnt);
1154 if (++breaderrors > BREADEMAX) {
1155 msg("More than %d block read errors from %d\n",
1157 broadcast("DUMP IS AILING!\n");
1158 msg("This is an unrecoverable error.\n");
1159 if (!query("Do you want to attempt to continue?")){
1166 * Zero buffer, then try to read each sector of buffer separately.
1168 memset(buf, 0, size);
1169 for (i = 0; i < size; i += dev_bsize, buf += dev_bsize, blkno++) {
1171 if (ext2fs_llseek(diskfd, (((ext2_loff_t)blkno) << dev_bshift), 0) !=
1172 (((ext2_loff_t)blkno) << dev_bshift))
1174 if (lseek(diskfd, ((off_t)blkno << dev_bshift), 0) !=
1175 ((off_t)blkno << dev_bshift))
1177 msg("bread: lseek2 fails!\n");
1178 if ((cnt = read(diskfd, buf, (int)dev_bsize)) == dev_bsize)
1181 msg("read error from %s: %s: [sector %d]: count=%d\n",
1182 disk, strerror(errno), blkno, dev_bsize);
1185 msg("short read error from %s: [sector %d]: count=%d, got=%d\n",
1186 disk, blkno, dev_bsize, cnt);