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
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 1.10 1999/11/21 02:24:47 tiniou 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)
194 * Determine if given inode should be dumped
197 mapfileino(ino_t ino, long *tapesize, int *dirskipped)
200 register struct dinode *dp;
203 * Skip inode if we've already marked it for dumping
205 if (TSTINO(ino, usedinomap))
208 if ((mode = (dp->di_mode & IFMT)) == 0)
211 if (dp->di_nlink == 0 || dp->di_dtime != 0)
215 * Put all dirs in dumpdirmap, inodes that are to be dumped in the
216 * used map. All inode but dirs who have the nodump attribute go
219 SETINO(ino, usedinomap);
221 SETINO(ino, dumpdirmap);
222 if (WANTTODUMP(dp)) {
223 SETINO(ino, dumpinomap);
224 if (mode != IFREG && mode != IFDIR && mode != IFLNK)
227 *tapesize += blockest(dp);
232 if (!nonodump && (dp->di_flags & UF_NODUMP))
233 CLRINO(ino, usedinomap);
242 * Walk the inode list for a filesystem to find all allocated inodes
243 * that have been modified since the previous dump time. Also, find all
244 * the directories in the filesystem.
247 mapfiles(ino_t maxino, long *tapesize)
250 int anydirskipped = 0;
252 for (ino = ROOTINO; ino < maxino; ino++)
253 mapfileino(ino, tapesize, &anydirskipped);
256 * Restore gets very upset if the root is not dumped,
257 * so ensure that it always is dumped.
259 SETINO(ROOTINO, dumpinomap);
260 return (anydirskipped);
264 struct mapfile_context {
270 mapfilesindir(struct ext2_dir_entry *dirent, int offset, int blocksize, char *buf, void *private)
272 register struct dinode *dp;
275 struct mapfile_context *mfc;
279 mfc = (struct mapfile_context *)private;
281 mapfileino(dirent->inode, mfc->tapesize, mfc->anydirskipped);
283 dp = getino(dirent->inode);
284 mode = dp->di_mode & IFMT;
285 if (mode == IFDIR && dp->di_nlink != 0 && dp->di_dtime == 0) {
286 if ((dirent->name[0] != '.' || dirent->name_len != 1) &&
287 (dirent->name[0] != '.' || dirent->name[1] != '.' ||
288 dirent->name_len != 2)) {
289 retval = ext2fs_dir_iterate(fs, ino, 0, NULL,
290 mapfilesindir, private);
301 * Walk the inode list for a filesystem to find all allocated inodes
302 * that have been modified since the previous dump time. Also, find all
303 * the directories in the filesystem.
306 mapfilesfromdir(ino_t maxino, long *tapesize, char *directory)
309 struct mapfile_context mfc;
311 char dir_name [MAXPATHLEN];
312 int i, anydirskipped = 0;
315 * Mark every directory in the path as being dumped
317 for (i = 0; i < strlen (directory); i++) {
318 if (directory[i] == '/') {
319 strncpy (dir_name, directory, i);
321 retval = ext2fs_namei(fs, ROOTINO, ROOTINO, dir_name,
324 com_err(disk, retval, "while translating %s",
328 mapfileino(dir_ino, tapesize, &anydirskipped);
332 * Mark the final directory
334 retval = ext2fs_namei(fs, ROOTINO, ROOTINO, directory, &dir_ino);
336 com_err(disk, retval, "while translating %s", directory);
339 mapfileino(dir_ino, tapesize, &anydirskipped);
341 mfc.tapesize = tapesize;
342 mfc.anydirskipped = &anydirskipped;
343 retval = ext2fs_dir_iterate(fs, dir_ino, 0, NULL, mapfilesindir,
347 com_err(disk, retval, "while mapping files in %s", directory);
351 * Ensure that the root inode actually appears in the file list
354 mapfileino(ROOTINO, tapesize, &anydirskipped);
356 * Restore gets very upset if the root is not dumped,
357 * so ensure that it always is dumped.
359 SETINO(ROOTINO, dumpinomap);
360 return anydirskipped;
365 struct mapdirs_context {
375 * Scan each directory on the filesystem to see if it has any modified
376 * files in it. If it does, and has not already been added to the dump
377 * list (because it was itself modified), then add it. If a directory
378 * has not been modified itself, contains no modified files and has no
379 * subdirectories, then it can be deleted from the dump list and from
380 * the list of directories. By deleting it from the list of directories,
381 * its parent may now qualify for the same treatment on this or a later
382 * pass using this algorithm.
385 mapdirs(ino_t maxino, long *tapesize)
387 register struct dinode *dp;
395 struct mapdirs_context mdc;
397 int ret, change = 0, nodump;
399 isdir = 0; /* XXX just to get gcc to shut up */
400 for (map = dumpdirmap, ino = 1; ino < maxino; ino++) {
401 if (((ino - 1) % NBBY) == 0) /* map is offset by 1 */
406 * If dir has been removed from the used map, it's either
407 * because it had the nodump flag, or it herited it from
408 * its parent. A directory can't be in dumpinomap if not
409 * in usedinomap, but we have to go through it anyway
410 * to propagate the nodump attribute.
412 nodump = (TSTINO(ino, usedinomap) == 0);
413 if ((isdir & 1) == 0 ||
414 (TSTINO(ino, dumpinomap) && nodump == 0))
421 mdc.tapesize = tapesize;
422 ext2fs_dir_iterate(fs, ino, 0, NULL, searchdir, (void *) &mdc);
423 #else /* __linux__ */
424 filesize = dp->di_size;
425 for (ret = 0, i = 0; filesize > 0 && i < NDADDR; i++) {
426 if (dp->di_db[i] != 0)
427 ret |= searchdir(ino, dp->di_db[i],
428 (long)dblksize(sblock, dp, i),
430 if (ret & HASDUMPEDFILE)
433 filesize -= sblock->fs_bsize;
435 for (i = 0; filesize > 0 && i < NIADDR; i++) {
436 if (dp->di_ib[i] == 0)
438 ret |= dirindir(ino, dp->di_ib[i], i, &filesize);
440 #endif /* __linux__ */
441 if (ret & HASDUMPEDFILE) {
442 SETINO(ino, dumpinomap);
443 *tapesize += blockest(dp);
448 if (ret & HASSUBDIRS)
449 change = 1; /* subdirs have inherited nodump */
450 CLRINO(ino, dumpdirmap);
451 } else if ((ret & HASSUBDIRS) == 0) {
452 if (!TSTINO(ino, dumpinomap)) {
453 CLRINO(ino, dumpdirmap);
463 * Read indirect blocks, and pass the data blocks to be searched
464 * as directories. Quit as soon as any entry is found that will
465 * require the directory to be dumped.
468 dirindir(ino_t ino, daddr_t blkno, int ind_level, long *filesize)
472 daddr_t idblk[MAXNINDIR];
474 bread(fsbtodb(sblock, blkno), (char *)idblk, (int)sblock->fs_bsize);
475 if (ind_level <= 0) {
476 for (i = 0; *filesize > 0 && i < NINDIR(sblock); i++) {
479 ret |= searchdir(ino, blkno, sblock->fs_bsize,
481 if (ret & HASDUMPEDFILE)
484 *filesize -= sblock->fs_bsize;
489 for (i = 0; *filesize > 0 && i < NINDIR(sblock); i++) {
492 ret |= dirindir(ino, blkno, ind_level, filesize);
496 #endif /* !__linux__ */
499 * Scan a disk block containing directory information looking to see if
500 * any of the entries are on the dump list and to see if the directory
501 * contains any subdirectories.
505 searchdir(struct ext2_dir_entry *dp, int offset, int blocksize, char *buf, void *private)
507 struct mapdirs_context *mdc;
512 mdc = (struct mapdirs_context *)private;
514 tapesize = mdc->tapesize;
518 if (dp->name[0] == '.') {
519 if (dp->name_len == 1)
521 if (dp->name[1] == '.' && dp->name_len == 2)
525 ip = getino(dp->inode);
526 if (TSTINO(dp->inode, dumpinomap)) {
527 CLRINO(dp->inode, dumpinomap);
528 CLRINO(dp->inode, usedinomap);
529 *tapesize -= blockest(ip);
531 /* Add dir back to the dir map, to propagate nodump */
532 if ((ip->di_mode & IFMT) == IFDIR) {
533 SETINO(dp->inode, dumpdirmap);
537 if (TSTINO(dp->inode, dumpinomap)) {
538 *ret |= HASDUMPEDFILE;
539 if (*ret & HASSUBDIRS)
542 if (TSTINO(dp->inode, dumpdirmap)) {
544 if (*ret & HASDUMPEDFILE)
551 #else /* __linux__ */
554 searchdir(ino_t ino, daddr_t blkno, long size, long filesize)
556 register struct direct *dp;
557 register long loc, ret = 0;
560 bread(fsbtodb(sblock, blkno), dblk, (int)size);
563 for (loc = 0; loc < size; ) {
564 dp = (struct direct *)(dblk + loc);
565 if (dp->d_reclen == 0) {
566 msg("corrupted directory, inumber %d\n", ino);
572 if (dp->d_name[0] == '.') {
573 if (dp->d_name[1] == '\0')
575 if (dp->d_name[1] == '.' && dp->d_name[2] == '\0')
578 if (TSTINO(dp->d_ino, dumpinomap)) {
579 ret |= HASDUMPEDFILE;
580 if (ret & HASSUBDIRS)
583 if (TSTINO(dp->d_ino, dumpdirmap)) {
585 if (ret & HASDUMPEDFILE)
591 #endif /* __linux__ */
595 struct block_context {
604 * Dump a block to the tape
607 dumponeblock(ext2_filsys fs, blk_t *blocknr, int blockcnt, void *private)
609 struct block_context *p;
612 if (blockcnt < NDADDR)
614 p = (struct block_context *)private;
615 for (i = p->next_block; i < blockcnt; i++) {
616 p->buf[p->cnt++] = 0;
617 if (p->cnt == p->max) {
618 blksout (p->buf, p->cnt, p->ino);
622 p->buf[p->cnt++] = *blocknr;
623 if (p->cnt == p->max) {
624 blksout (p->buf, p->cnt, p->ino);
627 p->next_block = blockcnt + 1;
633 * Dump passes 3 and 4.
635 * Dump the contents of an inode to tape.
638 dumpino(struct dinode *dp, ino_t ino)
643 struct old_bsd_inode obi;
645 struct block_context bc;
652 dumpmap(dumpinomap, TS_BITS, ino);
654 CLRINO(ino, dumpinomap);
656 memset(&obi, 0, sizeof(obi));
657 obi.di_mode = dp->di_mode;
658 obi.di_uid = dp->di_uid;
659 obi.di_gid = dp->di_gid;
660 obi.di_qsize.v = (u_quad_t)dp->di_size;
661 obi.di_atime = dp->di_atime;
662 obi.di_mtime = dp->di_mtime;
663 obi.di_ctime = dp->di_ctime;
664 obi.di_nlink = dp->di_nlink;
665 obi.di_blocks = dp->di_blocks;
666 obi.di_flags = dp->di_flags;
667 obi.di_gen = dp->di_gen;
668 memmove(&obi.di_db, &dp->di_db, (NDADDR + NIADDR) * sizeof(daddr_t));
669 if (dp->di_file_acl || dp->di_dir_acl)
670 warn("ACLs in inode #%ld won't be dumped", ino);
671 memmove(&spcl.c_dinode, &obi, sizeof(obi));
672 #else /* __linux__ */
674 #endif /* __linux__ */
675 spcl.c_type = TS_INODE;
677 switch (dp->di_mode & S_IFMT) {
687 msg("Warning: dumpino called on a directory (ino %d)\n", ino);
693 * Check for short symbolic link.
696 if (dp->di_size > 0 &&
697 dp->di_size < EXT2_N_BLOCKS * sizeof (daddr_t)) {
701 memmove(buf, dp->di_db, (u_long)dp->di_size);
702 buf[dp->di_size] = '\0';
706 #endif /* __linux__ */
708 if (dp->di_size > 0 &&
709 dp->di_size < sblock->fs_maxsymlinklen) {
713 memmove(buf, dp->di_shortlink, (u_long)dp->di_size);
714 buf[dp->di_size] = '\0';
737 msg("Warning: undefined file type 0%o\n", dp->di_mode & IFMT);
740 if (dp->di_size > NDADDR * sblock->fs_bsize)
742 cnt = NDADDR * EXT2_FRAGS_PER_BLOCK(fs->super);
744 cnt = NDADDR * sblock->fs_frag;
747 cnt = howmany(dp->di_size, sblock->fs_fsize);
748 blksout(&dp->di_db[0], cnt, ino);
749 if ((size = dp->di_size - NDADDR * sblock->fs_bsize) <= 0)
752 bc.max = NINDIR(sblock) * EXT2_FRAGS_PER_BLOCK(fs->super);
753 bc.buf = (int *)malloc (bc.max * sizeof (int));
756 bc.next_block = NDADDR;
758 ext2fs_block_iterate (fs, ino, 0, NULL, dumponeblock, (void *)&bc);
760 blksout (bc.buf, bc.cnt, bc.ino);
763 for (ind_level = 0; ind_level < NIADDR; ind_level++) {
764 dmpindir(ino, dp->di_ib[ind_level], ind_level, &size);
773 struct convert_dir_context {
781 * This function converts an ext2fs directory entry to the BSD format.
783 * Basically, it adds a null-character at the end of the name, recomputes the
784 * size of the entry, and creates it in a temporary buffer
787 convert_dir(struct ext2_dir_entry *dirent, int offset, int blocksize, char *buf, void *private)
789 struct convert_dir_context *p;
793 p = (struct convert_dir_context *)private;
795 reclen = EXT2_DIR_REC_LEN((dirent->name_len & 0xFF) + 1);
796 if (((p->offset + reclen - 1) / p->bs) != (p->offset / p->bs)) {
797 dp = (struct direct *)(p->buf + p->prev_offset);
798 dp->d_reclen += p->bs - (p->offset % p->bs);
799 p->offset += p->bs - (p->offset % p->bs);
802 dp = (struct direct *)(p->buf + p->offset);
803 dp->d_ino = dirent->inode;
804 dp->d_reclen = reclen;
806 dp->d_namlen = dirent->name_len & 0xFF;
807 strncpy(dp->d_name, dirent->name, dp->d_namlen);
808 dp->d_name[dp->d_namlen] = '\0';
809 p->prev_offset = p->offset;
818 * Dumps a directory to tape after converting it to the BSD format
821 dumpdirino(struct dinode *dp, ino_t ino)
825 struct old_bsd_inode obi;
826 struct convert_dir_context cdc;
828 struct ext2_dir_entry *de;
833 dumpmap(dumpinomap, TS_BITS, ino);
835 CLRINO(ino, dumpinomap);
838 * Convert the directory to the BSD format
840 /* Allocate a buffer for the conversion (twice the size of the
841 ext2fs directory to avoid problems ;-) */
842 cdc.buf = (char *)malloc(dp->di_size * 2 * sizeof(char));
844 err(1, "Cannot allocate buffer to convert directory #%lu\n",
848 cdc.bs = MIN(DIRBLKSIZ, TP_BSIZE);
849 /* Do the conversion */
850 retval = ext2fs_dir_iterate(fs, ino, 0, NULL, convert_dir, (void *)&cdc);
852 com_err(disk, retval, "while converting directory #%ld\n", ino);
855 /* Fix the last entry */
856 if ((cdc.offset % cdc.bs) != 0) {
857 de = (struct ext2_dir_entry *)(cdc.buf + cdc.prev_offset);
858 de->rec_len += cdc.bs - (cdc.offset % cdc.bs);
859 cdc.offset += cdc.bs - (cdc.offset % cdc.bs);
862 dir_size = cdc.offset;
865 memset(&obi, 0, sizeof(obi));
866 obi.di_mode = dp->di_mode;
867 obi.di_uid = dp->di_uid;
868 obi.di_gid = dp->di_gid;
869 obi.di_qsize.v = dir_size; /* (u_quad_t)dp->di_size; */
870 obi.di_atime = dp->di_atime;
871 obi.di_mtime = dp->di_mtime;
872 obi.di_ctime = dp->di_ctime;
873 obi.di_nlink = dp->di_nlink;
874 obi.di_blocks = dp->di_blocks;
875 obi.di_flags = dp->di_flags;
876 obi.di_gen = dp->di_gen;
877 memmove(&obi.di_db, &dp->di_db, (NDADDR + NIADDR) * sizeof(daddr_t));
878 if (dp->di_file_acl || dp->di_dir_acl)
879 warn("ACLs in inode #%ld won't be dumped", ino);
880 memmove(&spcl.c_dinode, &obi, sizeof(obi));
881 #else /* __linux__ */
883 #endif /* __linux__ */
884 spcl.c_type = TS_INODE;
886 switch (dp->di_mode & S_IFMT) {
897 msg("Warning: size of directory inode #%d is <= 0 (%d)!\n",
902 msg("Warning: dumpdirino called with file type 0%o (inode #%d)\n",
903 dp->di_mode & IFMT, ino);
906 for (size = 0; size < dir_size; size += TP_BSIZE) {
910 memmove(buf, cdc.buf + size, TP_BSIZE);
912 spcl.c_type = TS_ADDR;
917 #endif /* __linux__ */
921 * Read indirect blocks, and pass the data blocks to be dumped.
924 dmpindir(ino_t ino, daddr_t blk, int ind_level, fsizeT *size)
931 daddr_t idblk[MAXNINDIR];
934 bread(fsbtodb(sblock, blk), (char *)idblk, (int) sblock->fs_bsize);
937 * My RedHat 4.0 system doesn't have these flags; I haven't
938 * upgraded e2fsprogs yet
940 #if defined(EXT2_FLAG_SWAP_BYTES)
941 if ((fs->flags & EXT2_FLAG_SWAP_BYTES) ||
942 (fs->flags & EXT2_FLAG_SWAP_BYTES_READ)) {
944 max = sblock->fs_bsize >> 2;
945 swapme = (blk_t *) idblk;
946 for (i = 0; i < max; i++, swapme++)
947 *swapme = swab32(*swapme);
948 #if defined(EXT2_FLAG_SWAP_BYTES)
953 memset(idblk, 0, (int)sblock->fs_bsize);
954 if (ind_level <= 0) {
955 if (*size < NINDIR(sblock) * sblock->fs_bsize)
956 cnt = howmany(*size, sblock->fs_fsize);
959 cnt = NINDIR(sblock) * EXT2_FRAGS_PER_BLOCK(fs->super);
961 cnt = NINDIR(sblock) * sblock->fs_frag;
963 *size -= NINDIR(sblock) * sblock->fs_bsize;
964 blksout(&idblk[0], cnt, ino);
968 for (i = 0; i < NINDIR(sblock); i++) {
969 dmpindir(ino, idblk[i], ind_level, size);
977 * Collect up the data into tape record sized buffers and output them.
980 blksout(daddr_t *blkp, int frags, ino_t ino)
982 register daddr_t *bp;
983 int i, j, count, blks, tbperdb;
985 blks = howmany(frags * sblock->fs_fsize, TP_BSIZE);
986 tbperdb = sblock->fs_bsize >> tp_bshift;
987 for (i = 0; i < blks; i += TP_NINDIR) {
988 if (i + TP_NINDIR > blks)
991 count = i + TP_NINDIR;
992 for (j = i; j < count; j++)
993 if (blkp[j / tbperdb] != 0)
994 spcl.c_addr[j - i] = 1;
996 spcl.c_addr[j - i] = 0;
997 spcl.c_count = count - i;
999 bp = &blkp[i / tbperdb];
1000 for (j = i; j < count; j += tbperdb, bp++) {
1002 if (j + tbperdb <= count)
1003 dumpblock(*bp, (int)sblock->fs_bsize);
1005 dumpblock(*bp, (count - j) * TP_BSIZE);
1008 spcl.c_type = TS_ADDR;
1013 * Dump a map to the tape.
1016 dumpmap(char *map, int type, ino_t ino)
1022 spcl.c_count = howmany(mapsize * sizeof(char), TP_BSIZE);
1024 for (i = 0, cp = map; i < spcl.c_count; i++, cp += TP_BSIZE)
1029 * Write a header record to the dump tape.
1032 writeheader(ino_t ino)
1035 register __s32 sum, cnt, *lp;
1037 register int32_t sum, cnt, *lp;
1040 spcl.c_inumber = ino;
1041 spcl.c_magic = NFS_MAGIC;
1042 spcl.c_checksum = 0;
1044 lp = (__s32 *)&spcl;
1046 lp = (int32_t *)&spcl;
1050 cnt = sizeof(union u_spcl) / (4 * sizeof(__s32));
1052 cnt = sizeof(union u_spcl) / (4 * sizeof(int32_t));
1054 while (--cnt >= 0) {
1060 spcl.c_checksum = CHECKSUM - sum;
1061 writerec((char *)&spcl, 1);
1068 static struct dinode dinode;
1071 ext2fs_read_inode(fs, inum, (struct ext2_inode *) &dinode);
1074 #else /* __linux__ */
1078 static daddr_t minino, maxino;
1079 static struct dinode inoblock[MAXINOPB];
1082 if (inum >= minino && inum < maxino)
1083 return (&inoblock[inum - minino]);
1084 bread(fsbtodb(sblock, ino_to_fsba(sblock, inum)), (char *)inoblock,
1085 (int)sblock->fs_bsize);
1086 minino = inum - (inum % INOPB(sblock));
1087 maxino = minino + INOPB(sblock);
1088 return (&inoblock[inum - minino]);
1090 #endif /* __linux__ */
1093 * Read a chunk of data from the disk.
1094 * Try to recover from hard errors by reading in sector sized pieces.
1095 * Error recovery is attempted at most BREADEMAX times before seeking
1096 * consent from the operator to continue.
1098 int breaderrors = 0;
1099 #define BREADEMAX 32
1102 bread(daddr_t blkno, char *buf, int size)
1109 if (ext2fs_llseek(diskfd, (((ext2_loff_t)blkno) << dev_bshift), 0) !=
1110 (((ext2_loff_t)blkno) << dev_bshift))
1112 if (lseek(diskfd, ((off_t)blkno << dev_bshift), 0) !=
1113 ((off_t)blkno << dev_bshift))
1115 msg("bread: lseek fails\n");
1116 if ((cnt = read(diskfd, buf, size)) == size)
1118 if (blkno + (size / dev_bsize) > fsbtodb(sblock, sblock->fs_size)) {
1120 * Trying to read the final fragment.
1122 * NB - dump only works in TP_BSIZE blocks, hence
1123 * rounds `dev_bsize' fragments up to TP_BSIZE pieces.
1124 * It should be smarter about not actually trying to
1125 * read more than it can get, but for the time being
1126 * we punt and scale back the read only when it gets
1127 * us into trouble. (mkm 9/25/83)
1133 msg("read error from %s: %s: [block %d]: count=%d\n",
1134 disk, strerror(errno), blkno, size);
1136 msg("short read error from %s: [block %d]: count=%d, got=%d\n",
1137 disk, blkno, size, cnt);
1138 if (++breaderrors > BREADEMAX) {
1139 msg("More than %d block read errors from %d\n",
1141 broadcast("DUMP IS AILING!\n");
1142 msg("This is an unrecoverable error.\n");
1143 if (!query("Do you want to attempt to continue?")){
1150 * Zero buffer, then try to read each sector of buffer separately.
1152 memset(buf, 0, size);
1153 for (i = 0; i < size; i += dev_bsize, buf += dev_bsize, blkno++) {
1155 if (ext2fs_llseek(diskfd, (((ext2_loff_t)blkno) << dev_bshift), 0) !=
1156 (((ext2_loff_t)blkno) << dev_bshift))
1158 if (lseek(diskfd, ((off_t)blkno << dev_bshift), 0) !=
1159 ((off_t)blkno << dev_bshift))
1161 msg("bread: lseek2 fails!\n");
1162 if ((cnt = read(diskfd, buf, (int)dev_bsize)) == dev_bsize)
1165 msg("read error from %s: %s: [sector %d]: count=%d\n",
1166 disk, strerror(errno), blkno, dev_bsize);
1169 msg("short read error from %s: [sector %d]: count=%d, got=%d\n",
1170 disk, blkno, dev_bsize, cnt);