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@noos.fr>, 1999-2000
6 * Stelian Pop <pop@noos.fr> - AlcĂ´ve <www.alcove.fr>, 2000
10 * Copyright (c) 1980, 1988, 1991, 1993
11 * The Regents of the University of California. All rights reserved.
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
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. All advertising materials mentioning features or use of this software
22 * must display the following acknowledgement:
23 * This product includes software developed by the University of
24 * California, Berkeley and its contributors.
25 * 4. Neither the name of the University nor the names of its contributors
26 * may be used to endorse or promote products derived from this software
27 * without specific prior written permission.
29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
32 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
43 static const char rcsid[] =
44 "$Id: traverse.c,v 1.30 2001/03/23 14:40:12 stelian Exp $";
55 #include <sys/param.h>
58 #include <linux/ext2_fs.h>
59 #include <ext2fs/ext2fs.h>
60 #include <bsdcompat.h>
61 #include <compaterr.h>
64 #include <sys/vnode.h>
67 #include <ufs/fsdir.h>
68 #include <ufs/inode.h>
70 #include <ufs/ufs/dir.h>
71 #include <ufs/ufs/dinode.h>
72 #include <ufs/ffs/fs.h>
73 #endif /* __linux__ */
75 #include <protocols/dumprestore.h>
79 #define HASDUMPEDFILE 0x1
80 #define HASSUBDIRS 0x2
83 typedef u_quad_t fsizeT;
86 typedef quad_t fsizeT;
93 static int searchdir __P((struct ext2_dir_entry *dp, int offset,
94 int blocksize, char *buf, void *private));
96 static int dirindir __P((dump_ino_t ino, daddr_t blkno, int level, long *size));
97 static void dmpindir __P((dump_ino_t ino, daddr_t blk, int level, fsizeT *size));
98 static int searchdir __P((dump_ino_t ino, daddr_t blkno, long size, long filesize));
100 static void mapfileino __P((dump_ino_t ino, struct dinode const *dp, long *tapesize, int *dirskipped));
101 static int exclude_ino __P((dump_ino_t ino));
102 extern dump_ino_t iexclude_list[IEXCLUDE_MAXNUM]; /* the inode exclude list */
103 extern int iexclude_num; /* number of elements in list */
105 #ifdef HAVE_EXT2_JOURNAL_INUM
106 #define ext2_journal_ino(sb) (sb->s_journal_inum)
108 #define ext2_journal_ino(sb) (*((__u32 *)sb + 0x38))
110 #ifndef HAVE_EXT2_INO_T
111 typedef ino_t ext2_ino_t;
114 #ifndef EXT3_FEATURE_COMPAT_HAS_JOURNAL
115 #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
117 #ifndef EXT2_FEATURE_INCOMPAT_FILETYPE
118 #define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002
120 #ifndef EXT3_FEATURE_INCOMPAT_RECOVER
121 #define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004
123 #ifndef EXT3_FEATURE_INCOMPAT_JOURNAL_DEV
124 #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008
127 #ifndef EXT2_LIB_FEATURE_INCOMPAT_SUPP
128 #define EXT2_LIB_FEATURE_INCOMPAT_SUPP (EXT3_FEATURE_INCOMPAT_RECOVER | \
129 EXT2_FEATURE_INCOMPAT_FILETYPE)
132 int dump_fs_open(const char *disk, ext2_filsys *fs)
136 retval = ext2fs_open(disk, EXT2_FLAG_FORCE, 0, 0, unix_io_manager, fs);
138 struct ext2_super_block *es = (*fs)->super;
139 dump_ino_t journal_ino = ext2_journal_ino(es);
141 if (es->s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV){
142 fprintf(stderr, "This an journal, not a filesystem!\n");
143 retval = EXT2_ET_UNSUPP_FEATURE;
146 else if ((retval = es->s_feature_incompat &
147 ~(EXT2_LIB_FEATURE_INCOMPAT_SUPP |
148 EXT3_FEATURE_INCOMPAT_RECOVER))) {
150 "Unsupported feature(s) 0x%x in filesystem\n",
152 retval = EXT2_ET_UNSUPP_FEATURE;
155 else if (es->s_feature_compat &
156 EXT3_FEATURE_COMPAT_HAS_JOURNAL &&
157 journal_ino && !exclude_ino(journal_ino)) {
158 iexclude_list[iexclude_num++] = journal_ino;
159 msg("Added ext3 journal inode %u to exclude list\n",
167 * This is an estimation of the number of TP_BSIZE blocks in the file.
168 * It estimates the number of blocks in files with holes by assuming
169 * that all of the blocks accounted for by di_blocks are data blocks
170 * (when some of the blocks are usually used for indirect pointers);
171 * hence the estimate may be high.
174 blockest(struct dinode const *dp)
176 long blkest, sizeest;
180 * dp->di_size is the size of the file in bytes.
181 * dp->di_blocks stores the number of sectors actually in the file.
182 * If there are more sectors than the size would indicate, this just
183 * means that there are indirect blocks in the file or unused
184 * sectors in the last file block; we can safely ignore these
185 * (blkest = sizeest below).
186 * If the file is bigger than the number of sectors would indicate,
187 * then the file has holes in it. In this case we must use the
188 * block count to estimate the number of data blocks used, but
189 * we use the actual size for estimating the number of indirect
190 * dump blocks (sizeest vs. blkest in the indirect block
193 blkest = howmany((u_quad_t)dp->di_blocks*fs->blocksize, TP_BSIZE);
194 i_size = dp->di_size + ((u_quad_t) dp->di_size_high << 32);
195 sizeest = howmany(i_size, TP_BSIZE);
196 if (blkest > sizeest)
199 if (i_size > fs->blocksize * NDADDR) {
200 /* calculate the number of indirect blocks on the dump tape */
202 howmany(sizeest - NDADDR * fs->blocksize / TP_BSIZE,
203 NINDIR(sblock) * EXT2_FRAGS_PER_BLOCK(fs->super));
206 if (i_size > sblock->fs_bsize * NDADDR) {
207 /* calculate the number of indirect blocks on the dump tape */
209 howmany(sizeest - NDADDR * sblock->fs_bsize / TP_BSIZE,
217 * This tests whether an inode is in the exclude list
220 exclude_ino(dump_ino_t ino)
223 if (iexclude_num) { /* if there are inodes in the exclude list */
224 int idx; /* then check this inode against it */
225 for (idx = 0; idx < iexclude_num; idx++)
226 if (ino == iexclude_list[idx])
232 /* Auxiliary macro to pick up files changed since previous dump. */
233 #define CHANGEDSINCE(dp, t) \
234 ((dp)->di_mtime >= (t) || (dp)->di_ctime >= (t))
236 /* The NODUMP_FLAG macro tests if a file has the nodump flag. */
238 #define NODUMP_FLAG(dp) (!nonodump && (((dp)->di_flags & UF_NODUMP) == UF_NODUMP))
240 #define NODUMP_FLAG(dp) 0
243 /* The WANTTODUMP macro decides whether a file should be dumped. */
244 #define WANTTODUMP(dp, ino) \
245 (CHANGEDSINCE(dp, spcl.c_ddate) && \
246 (!NODUMP_FLAG(dp)) && \
250 * Determine if given inode should be dumped. "dp" must either point to a
251 * copy of the given inode, or be NULL (in which case it is fetched.)
254 mapfileino(dump_ino_t ino, struct dinode const *dp, long *tapesize, int *dirskipped)
259 * Skip inode if we've already marked it for dumping
261 if (TSTINO(ino, usedinomap))
265 if ((mode = (dp->di_mode & IFMT)) == 0)
268 if (dp->di_nlink == 0 || dp->di_dtime != 0)
272 * Put all dirs in dumpdirmap, inodes that are to be dumped in the
273 * used map. All inode but dirs who have the nodump attribute go
276 SETINO(ino, usedinomap);
279 SETINO(ino, dumpdirmap);
280 if (WANTTODUMP(dp, ino)) {
281 SETINO(ino, dumpinomap);
282 if (mode != IFREG && mode != IFDIR && mode != IFLNK)
285 *tapesize += blockest(dp);
289 if ( NODUMP_FLAG(dp) || exclude_ino(ino) )
290 CLRINO(ino, usedinomap);
298 * Walk the inode list for a filesystem to find all allocated inodes
299 * that have been modified since the previous dump time. Also, find all
300 * the directories in the filesystem.
304 mapfiles(dump_ino_t maxino, long *tapesize)
307 int anydirskipped = 0;
308 ext2_inode_scan scan;
310 struct ext2_inode inode;
313 * We use libext2fs's inode scanning routines, which are particularly
314 * robust. (Note that getino cannot return an error.)
316 err = ext2fs_open_inode_scan(fs, 0, &scan);
318 com_err(disk, err, "while opening inodes\n");
322 err = ext2fs_get_next_inode(scan, &ino, &inode);
323 if (err == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE)
326 com_err(disk, err, "while scanning inode #%ld\n",
334 mapfileino(ino, (struct dinode const *)&inode, tapesize,
337 ext2fs_close_inode_scan(scan);
340 * Restore gets very upset if the root is not dumped,
341 * so ensure that it always is dumped.
343 SETINO(ROOTINO, dumpinomap);
344 return (anydirskipped);
348 mapfiles(dump_ino_t maxino, long *tapesize)
350 register dump_ino_t ino;
351 int anydirskipped = 0;
353 for (ino = ROOTINO; ino < maxino; ino++)
354 mapfileino(ino, tapesize, &anydirskipped);
357 * Restore gets very upset if the root is not dumped,
358 * so ensure that it always is dumped.
360 SETINO(ROOTINO, dumpinomap);
361 return (anydirskipped);
363 #endif /* __linux__ */
366 struct mapfile_context {
372 mapfilesindir(struct ext2_dir_entry *dirent, int offset, int blocksize, char *buf, void *private)
374 register struct dinode const *dp;
377 struct mapfile_context *mfc;
381 mfc = (struct mapfile_context *)private;
382 dp = getino(dirent->inode);
384 mapfileino(dirent->inode, dp, mfc->tapesize, mfc->anydirskipped);
386 mode = dp->di_mode & IFMT;
387 if (mode == IFDIR && dp->di_nlink != 0 && dp->di_dtime == 0) {
388 if ((dirent->name[0] != '.' || ( dirent->name_len & 0xFF ) != 1) &&
389 (dirent->name[0] != '.' || dirent->name[1] != '.' ||
390 ( dirent->name_len & 0xFF ) != 2)) {
391 retval = ext2fs_dir_iterate(fs, ino, 0, NULL,
392 mapfilesindir, private);
403 * Walk the inode list for a filesystem to find all allocated inodes
404 * that have been modified since the previous dump time. Also, find all
405 * the directories in the filesystem.
408 mapfilesfromdir(dump_ino_t maxino, long *tapesize, char *directory)
411 struct mapfile_context mfc;
413 char dir_name [MAXPATHLEN];
414 int i, anydirskipped = 0;
417 * Mark every directory in the path as being dumped
419 for (i = 0; i < strlen (directory); i++) {
420 if (directory[i] == '/') {
421 strncpy (dir_name, directory, i);
423 retval = ext2fs_namei(fs, ROOTINO, ROOTINO, dir_name,
426 com_err(disk, retval, "while translating %s",
430 mapfileino(dir_ino, 0, tapesize, &anydirskipped);
434 * Mark the final directory
436 retval = ext2fs_namei(fs, ROOTINO, ROOTINO, directory, &dir_ino);
438 com_err(disk, retval, "while translating %s", directory);
441 mapfileino(dir_ino, 0, tapesize, &anydirskipped);
443 mfc.tapesize = tapesize;
444 mfc.anydirskipped = &anydirskipped;
445 retval = ext2fs_dir_iterate(fs, dir_ino, 0, NULL, mapfilesindir,
449 com_err(disk, retval, "while mapping files in %s", directory);
453 * Ensure that the root inode actually appears in the file list
456 mapfileino(ROOTINO, 0, tapesize, &anydirskipped);
458 * Restore gets very upset if the root is not dumped,
459 * so ensure that it always is dumped.
461 SETINO(ROOTINO, dumpinomap);
462 return anydirskipped;
467 struct mapdirs_context {
477 * Scan each directory on the filesystem to see if it has any modified
478 * files in it. If it does, and has not already been added to the dump
479 * list (because it was itself modified), then add it. If a directory
480 * has not been modified itself, contains no modified files and has no
481 * subdirectories, then it can be deleted from the dump list and from
482 * the list of directories. By deleting it from the list of directories,
483 * its parent may now qualify for the same treatment on this or a later
484 * pass using this algorithm.
487 mapdirs(dump_ino_t maxino, long *tapesize)
489 register struct dinode *dp;
492 register dump_ino_t ino;
497 struct mapdirs_context mdc;
499 int ret, change = 0, nodump;
501 isdir = 0; /* XXX just to get gcc to shut up */
502 for (map = dumpdirmap, ino = 1; ino < maxino; ino++) {
503 if (((ino - 1) % NBBY) == 0) /* map is offset by 1 */
508 * If dir has been removed from the used map, it's either
509 * because it had the nodump flag, or it herited it from
510 * its parent. A directory can't be in dumpinomap if not
511 * in usedinomap, but we have to go through it anyway
512 * to propagate the nodump attribute.
514 nodump = (TSTINO(ino, usedinomap) == 0);
515 if ((isdir & 1) == 0 ||
516 (TSTINO(ino, dumpinomap) && nodump == 0))
523 mdc.tapesize = tapesize;
524 ext2fs_dir_iterate(fs, ino, 0, NULL, searchdir, (void *) &mdc);
525 #else /* __linux__ */
526 filesize = dp->di_size;
527 for (ret = 0, i = 0; filesize > 0 && i < NDADDR; i++) {
528 if (dp->di_db[i] != 0)
529 ret |= searchdir(ino, dp->di_db[i],
530 (long)dblksize(sblock, dp, i),
532 if (ret & HASDUMPEDFILE)
535 filesize -= sblock->fs_bsize;
537 for (i = 0; filesize > 0 && i < NIADDR; i++) {
538 if (dp->di_ib[i] == 0)
540 ret |= dirindir(ino, dp->di_ib[i], i, &filesize);
542 #endif /* __linux__ */
543 if (ret & HASDUMPEDFILE) {
544 SETINO(ino, dumpinomap);
545 *tapesize += blockest(dp);
550 if (ret & HASSUBDIRS)
551 change = 1; /* subdirs have inherited nodump */
552 CLRINO(ino, dumpdirmap);
553 } else if ((ret & HASSUBDIRS) == 0) {
554 if (!TSTINO(ino, dumpinomap)) {
555 CLRINO(ino, dumpdirmap);
565 * Read indirect blocks, and pass the data blocks to be searched
566 * as directories. Quit as soon as any entry is found that will
567 * require the directory to be dumped.
570 dirindir(dump_ino_t ino, daddr_t blkno, int ind_level, long *filesize)
574 daddr_t idblk[MAXNINDIR];
576 bread(fsbtodb(sblock, blkno), (char *)idblk, (int)sblock->fs_bsize);
577 if (ind_level <= 0) {
578 for (i = 0; *filesize > 0 && i < NINDIR(sblock); i++) {
581 ret |= searchdir(ino, blkno, sblock->fs_bsize,
583 if (ret & HASDUMPEDFILE)
586 *filesize -= sblock->fs_bsize;
591 for (i = 0; *filesize > 0 && i < NINDIR(sblock); i++) {
594 ret |= dirindir(ino, blkno, ind_level, filesize);
598 #endif /* !__linux__ */
601 * Scan a disk block containing directory information looking to see if
602 * any of the entries are on the dump list and to see if the directory
603 * contains any subdirectories.
607 searchdir(struct ext2_dir_entry *dp, int offset, int blocksize, char *buf, void *private)
609 struct mapdirs_context *mdc;
614 mdc = (struct mapdirs_context *)private;
616 tapesize = mdc->tapesize;
620 if (dp->name[0] == '.') {
621 if (( dp->name_len & 0xFF ) == 1)
623 if (dp->name[1] == '.' && ( dp->name_len & 0xFF ) == 2)
627 ip = getino(dp->inode);
628 if (TSTINO(dp->inode, dumpinomap)) {
629 CLRINO(dp->inode, dumpinomap);
630 CLRINO(dp->inode, usedinomap);
631 *tapesize -= blockest(ip);
633 /* Add dir back to the dir map, to propagate nodump */
634 if ((ip->di_mode & IFMT) == IFDIR) {
635 SETINO(dp->inode, dumpdirmap);
639 if (TSTINO(dp->inode, dumpinomap)) {
640 *ret |= HASDUMPEDFILE;
641 if (*ret & HASSUBDIRS)
644 if (TSTINO(dp->inode, dumpdirmap)) {
646 if (*ret & HASDUMPEDFILE)
653 #else /* __linux__ */
656 searchdir(dump_ino_t ino, daddr_t blkno, long size, long filesize)
658 register struct direct *dp;
659 register long loc, ret = 0;
662 bread(fsbtodb(sblock, blkno), dblk, (int)size);
665 for (loc = 0; loc < size; ) {
666 dp = (struct direct *)(dblk + loc);
667 if (dp->d_reclen == 0) {
668 msg("corrupted directory, inumber %d\n", ino);
674 if (dp->d_name[0] == '.') {
675 if (dp->d_name[1] == '\0')
677 if (dp->d_name[1] == '.' && dp->d_name[2] == '\0')
680 if (TSTINO(dp->d_ino, dumpinomap)) {
681 ret |= HASDUMPEDFILE;
682 if (ret & HASSUBDIRS)
685 if (TSTINO(dp->d_ino, dumpdirmap)) {
687 if (ret & HASDUMPEDFILE)
693 #endif /* __linux__ */
697 struct block_context {
706 * Dump a block to the tape
709 dumponeblock(ext2_filsys fs, blk_t *blocknr, e2_blkcnt_t blockcnt,
710 blk_t ref_block, int ref_offset, void * private)
712 struct block_context *p;
715 if (blockcnt < NDADDR)
717 p = (struct block_context *)private;
718 for (i = p->next_block; i < blockcnt; i++) {
719 p->buf[p->cnt++] = 0;
720 if (p->cnt == p->max) {
721 blksout (p->buf, p->cnt, p->ino);
725 p->buf[p->cnt++] = *blocknr;
726 if (p->cnt == p->max) {
727 blksout (p->buf, p->cnt, p->ino);
730 p->next_block = blockcnt + 1;
736 * Dump passes 3 and 4.
738 * Dump the contents of an inode to tape.
741 dumpino(struct dinode *dp, dump_ino_t ino)
746 struct old_bsd_inode obi;
748 struct block_context bc;
752 u_quad_t i_size = dp->di_size + ((u_quad_t) dp->di_size_high << 32);
756 dumpmap(dumpinomap, TS_BITS, ino);
758 CLRINO(ino, dumpinomap);
760 memset(&obi, 0, sizeof(obi));
761 obi.di_mode = dp->di_mode;
762 obi.di_uid = dp->di_uid;
763 obi.di_gid = dp->di_gid;
764 obi.di_qsize.v = i_size;
765 obi.di_atime = dp->di_atime;
766 obi.di_mtime = dp->di_mtime;
767 obi.di_ctime = dp->di_ctime;
768 obi.di_nlink = dp->di_nlink;
769 obi.di_blocks = dp->di_blocks;
770 obi.di_flags = dp->di_flags;
771 obi.di_gen = dp->di_gen;
772 memmove(&obi.di_db, &dp->di_db, (NDADDR + NIADDR) * sizeof(daddr_t));
774 warn("ACLs in inode #%ld won't be dumped", (long)ino);
775 memmove(&spcl.c_dinode, &obi, sizeof(obi));
776 #else /* __linux__ */
778 #endif /* __linux__ */
779 spcl.c_type = TS_INODE;
781 switch (dp->di_mode & S_IFMT) {
791 msg("Warning: dumpino called on a directory (ino %d)\n", ino);
797 * Check for short symbolic link.
801 i_size < EXT2_N_BLOCKS * sizeof (daddr_t)) {
805 memmove(buf, dp->di_db, (u_long)dp->di_size);
806 buf[dp->di_size] = '\0';
810 #endif /* __linux__ */
812 if (dp->di_size > 0 &&
813 dp->di_size < sblock->fs_maxsymlinklen) {
817 memmove(buf, dp->di_shortlink, (u_long)dp->di_size);
818 buf[dp->di_size] = '\0';
841 msg("Warning: undefined file type 0%o\n", dp->di_mode & IFMT);
844 if (i_size > NDADDR * sblock->fs_bsize)
846 cnt = NDADDR * EXT2_FRAGS_PER_BLOCK(fs->super);
848 cnt = NDADDR * sblock->fs_frag;
851 cnt = howmany(i_size, sblock->fs_fsize);
852 blksout(&dp->di_db[0], cnt, ino);
853 if ((quad_t) (size = i_size - NDADDR * sblock->fs_bsize) <= 0)
856 bc.max = NINDIR(sblock) * EXT2_FRAGS_PER_BLOCK(fs->super);
857 bc.buf = (int *)malloc (bc.max * sizeof (int));
860 bc.next_block = NDADDR;
862 ext2fs_block_iterate2(fs, (ext2_ino_t)ino, 0, NULL, dumponeblock, (void *)&bc);
864 blksout (bc.buf, bc.cnt, bc.ino);
868 for (ind_level = 0; ind_level < NIADDR; ind_level++) {
869 dmpindir(ino, dp->di_ib[ind_level], ind_level, &size);
878 struct convert_dir_context {
886 * This function converts an ext2fs directory entry to the BSD format.
888 * Basically, it adds a null-character at the end of the name, recomputes the
889 * size of the entry, and creates it in a temporary buffer
892 convert_dir(struct ext2_dir_entry *dirent, int offset, int blocksize, char *buf, void *private)
894 struct convert_dir_context *p;
895 struct olddirect *dp;
898 p = (struct convert_dir_context *)private;
900 reclen = EXT2_DIR_REC_LEN((dirent->name_len & 0xFF) + 1);
901 if (((p->offset + reclen - 1) / p->bs) != (p->offset / p->bs)) {
902 dp = (struct olddirect *)(p->buf + p->prev_offset);
903 dp->d_reclen += p->bs - (p->offset % p->bs);
904 p->offset += p->bs - (p->offset % p->bs);
907 dp = (struct olddirect *)(p->buf + p->offset);
908 dp->d_ino = dirent->inode;
909 dp->d_reclen = reclen;
910 dp->d_namlen = dirent->name_len & 0xFF;
911 strncpy(dp->d_name, dirent->name, dp->d_namlen);
912 dp->d_name[dp->d_namlen] = '\0';
913 p->prev_offset = p->offset;
922 * Dumps a directory to tape after converting it to the BSD format
925 dumpdirino(struct dinode *dp, dump_ino_t ino)
929 struct old_bsd_inode obi;
930 struct convert_dir_context cdc;
932 struct ext2_dir_entry *de;
937 dumpmap(dumpinomap, TS_BITS, ino);
939 CLRINO(ino, dumpinomap);
942 * Convert the directory to the BSD format
944 /* Allocate a buffer for the conversion (twice the size of the
945 ext2fs directory to avoid problems ;-) */
946 cdc.buf = (char *)malloc(dp->di_size * 2 * sizeof(char));
948 err(1, "Cannot allocate buffer to convert directory #%lu\n",
952 cdc.bs = MIN(DIRBLKSIZ, TP_BSIZE);
953 /* Do the conversion */
954 retval = ext2fs_dir_iterate(fs, (ext2_ino_t)ino, 0, NULL, convert_dir, (void *)&cdc);
956 com_err(disk, retval, "while converting directory #%ld\n", (long)ino);
959 /* Fix the last entry */
960 if ((cdc.offset % cdc.bs) != 0) {
961 de = (struct ext2_dir_entry *)(cdc.buf + cdc.prev_offset);
962 de->rec_len += cdc.bs - (cdc.offset % cdc.bs);
963 cdc.offset += cdc.bs - (cdc.offset % cdc.bs);
966 dir_size = cdc.offset;
969 memset(&obi, 0, sizeof(obi));
970 obi.di_mode = dp->di_mode;
971 obi.di_uid = dp->di_uid;
972 obi.di_gid = dp->di_gid;
973 obi.di_qsize.v = dir_size; /* (u_quad_t)dp->di_size; */
974 obi.di_atime = dp->di_atime;
975 obi.di_mtime = dp->di_mtime;
976 obi.di_ctime = dp->di_ctime;
977 obi.di_nlink = dp->di_nlink;
978 obi.di_blocks = dp->di_blocks;
979 obi.di_flags = dp->di_flags;
980 obi.di_gen = dp->di_gen;
981 memmove(&obi.di_db, &dp->di_db, (NDADDR + NIADDR) * sizeof(daddr_t));
983 warn("ACLs in inode #%ld won't be dumped", (long)ino);
984 memmove(&spcl.c_dinode, &obi, sizeof(obi));
985 #else /* __linux__ */
987 #endif /* __linux__ */
988 spcl.c_type = TS_INODE;
990 switch (dp->di_mode & S_IFMT) {
1001 msg("Warning: size of directory inode #%d is <= 0 (%d)!\n",
1006 msg("Warning: dumpdirino called with file type 0%o (inode #%d)\n",
1007 dp->di_mode & IFMT, ino);
1010 for (size = 0; size < dir_size; size += TP_BSIZE) {
1014 memmove(buf, cdc.buf + size, TP_BSIZE);
1016 spcl.c_type = TS_ADDR;
1019 (void)free(cdc.buf);
1021 #endif /* __linux__ */
1025 * Read indirect blocks, and pass the data blocks to be dumped.
1028 dmpindir(dump_ino_t ino, daddr_t blk, int ind_level, fsizeT *size)
1035 daddr_t idblk[MAXNINDIR];
1038 bread(fsbtodb(sblock, blk), (char *)idblk, (int) sblock->fs_bsize);
1041 * My RedHat 4.0 system doesn't have these flags; I haven't
1042 * upgraded e2fsprogs yet
1044 #if defined(EXT2_FLAG_SWAP_BYTES)
1045 if ((fs->flags & EXT2_FLAG_SWAP_BYTES) ||
1046 (fs->flags & EXT2_FLAG_SWAP_BYTES_READ))
1049 max = sblock->fs_bsize >> 2;
1050 swapme = (blk_t *) idblk;
1051 for (i = 0; i < max; i++, swapme++)
1052 *swapme = ext2fs_swab32(*swapme);
1054 #endif /* __linux__ */
1056 memset(idblk, 0, (int)sblock->fs_bsize);
1057 if (ind_level <= 0) {
1058 if (*size < NINDIR(sblock) * sblock->fs_bsize)
1059 cnt = howmany(*size, sblock->fs_fsize);
1062 cnt = NINDIR(sblock) * EXT2_FRAGS_PER_BLOCK(fs->super);
1064 cnt = NINDIR(sblock) * sblock->fs_frag;
1066 *size -= NINDIR(sblock) * sblock->fs_bsize;
1067 blksout(&idblk[0], cnt, ino);
1071 for (i = 0; i < NINDIR(sblock); i++) {
1072 dmpindir(ino, idblk[i], ind_level, size);
1080 * Collect up the data into tape record sized buffers and output them.
1083 blksout(daddr_t *blkp, int frags, dump_ino_t ino)
1085 register daddr_t *bp;
1086 int i, j, count, blks, tbperdb;
1088 blks = howmany(frags * sblock->fs_fsize, TP_BSIZE);
1089 tbperdb = sblock->fs_bsize >> tp_bshift;
1090 for (i = 0; i < blks; i += TP_NINDIR) {
1091 if (i + TP_NINDIR > blks)
1094 count = i + TP_NINDIR;
1095 for (j = i; j < count; j++)
1096 if (blkp[j / tbperdb] != 0)
1097 spcl.c_addr[j - i] = 1;
1099 spcl.c_addr[j - i] = 0;
1100 spcl.c_count = count - i;
1102 bp = &blkp[i / tbperdb];
1103 for (j = i; j < count; j += tbperdb, bp++) {
1105 if (j + tbperdb <= count)
1106 dumpblock(*bp, (int)sblock->fs_bsize);
1108 dumpblock(*bp, (count - j) * TP_BSIZE);
1111 spcl.c_type = TS_ADDR;
1116 * Dump a map to the tape.
1119 dumpmap(char *map, int type, dump_ino_t ino)
1125 spcl.c_count = howmany(mapsize * sizeof(char), TP_BSIZE);
1127 for (i = 0, cp = map; i < spcl.c_count; i++, cp += TP_BSIZE)
1132 * Write a header record to the dump tape.
1134 #if defined __linux__ && !defined(int32_t)
1135 #define int32_t __s32
1138 writeheader(dump_ino_t ino)
1140 register int32_t sum, cnt, *lp;
1142 spcl.c_inumber = ino;
1143 spcl.c_magic = NFS_MAGIC;
1144 spcl.c_checksum = 0;
1145 lp = (int32_t *)&spcl;
1147 cnt = sizeof(union u_spcl) / (4 * sizeof(int32_t));
1148 while (--cnt >= 0) {
1154 spcl.c_checksum = CHECKSUM - sum;
1155 writerec((char *)&spcl, 1);
1160 getino(dump_ino_t inum)
1162 static struct dinode dinode;
1166 err = ext2fs_read_inode(fs, (ext2_ino_t)inum, (struct ext2_inode *) &dinode);
1168 com_err(disk, err, "while reading inode #%ld\n", (long)inum);
1173 #else /* __linux__ */
1175 getino(dump_ino_t inum)
1177 static daddr_t minino, maxino;
1178 static struct dinode inoblock[MAXINOPB];
1181 if (inum >= minino && inum < maxino)
1182 return (&inoblock[inum - minino]);
1183 bread(fsbtodb(sblock, ino_to_fsba(sblock, inum)), (char *)inoblock,
1184 (int)sblock->fs_bsize);
1185 minino = inum - (inum % INOPB(sblock));
1186 maxino = minino + INOPB(sblock);
1187 return (&inoblock[inum - minino]);
1189 #endif /* __linux__ */
1192 * Read a chunk of data from the disk.
1193 * Try to recover from hard errors by reading in sector sized pieces.
1194 * Error recovery is attempted at most BREADEMAX times before seeking
1195 * consent from the operator to continue.
1197 int breaderrors = 0;
1198 #define BREADEMAX 32
1201 bread(daddr_t blkno, char *buf, int size)
1208 if (ext2fs_llseek(diskfd, (((ext2_loff_t)blkno) << dev_bshift), 0) !=
1209 (((ext2_loff_t)blkno) << dev_bshift))
1211 if (lseek(diskfd, ((off_t)blkno << dev_bshift), 0) !=
1212 ((off_t)blkno << dev_bshift))
1214 msg("bread: lseek fails\n");
1215 if ((cnt = read(diskfd, buf, size)) == size)
1217 if (blkno + (size / dev_bsize) > fsbtodb(sblock, sblock->fs_size)) {
1219 * Trying to read the final fragment.
1221 * NB - dump only works in TP_BSIZE blocks, hence
1222 * rounds `dev_bsize' fragments up to TP_BSIZE pieces.
1223 * It should be smarter about not actually trying to
1224 * read more than it can get, but for the time being
1225 * we punt and scale back the read only when it gets
1226 * us into trouble. (mkm 9/25/83)
1232 msg("read error from %s: %s: [block %d]: count=%d\n",
1233 disk, strerror(errno), blkno, size);
1235 msg("short read error from %s: [block %d]: count=%d, got=%d\n",
1236 disk, blkno, size, cnt);
1237 if (++breaderrors > BREADEMAX) {
1238 msg("More than %d block read errors from %d\n",
1240 broadcast("DUMP IS AILING!\n");
1241 msg("This is an unrecoverable error.\n");
1242 if (!query("Do you want to attempt to continue?")){
1249 * Zero buffer, then try to read each sector of buffer separately.
1251 memset(buf, 0, size);
1252 for (i = 0; i < size; i += dev_bsize, buf += dev_bsize, blkno++) {
1254 if (ext2fs_llseek(diskfd, (((ext2_loff_t)blkno) << dev_bshift), 0) !=
1255 (((ext2_loff_t)blkno) << dev_bshift))
1257 if (lseek(diskfd, ((off_t)blkno << dev_bshift), 0) !=
1258 ((off_t)blkno << dev_bshift))
1260 msg("bread: lseek2 fails!\n");
1261 if ((cnt = read(diskfd, buf, (int)dev_bsize)) == dev_bsize)
1264 msg("read error from %s: %s: [sector %d]: count=%d\n",
1265 disk, strerror(errno), blkno, dev_bsize);
1268 msg("short read error from %s: [sector %d]: count=%d, got=%d\n",
1269 disk, blkno, dev_bsize, cnt);