2 * Ported to Linux's Second Extended File System as part of the
3 * dump and restore backup suit
4 * Remy Card <card@Linux.EU.Org>, 1994-1997
5 * Stelian Pop <stelian@popies.net>, 1999-2000
6 * Stelian Pop <stelian@popies.net> - AlcĂ´ve <www.alcove.com>, 2000-2002
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 1.48 2002/07/17 10:18:52 stelian Exp $";
56 #include <sys/param.h>
59 #ifdef HAVE_EXT2FS_EXT2_FS_H
60 #include <ext2fs/ext2_fs.h>
62 #include <linux/ext2_fs.h>
64 #include <ext2fs/ext2fs.h>
65 #include <bsdcompat.h>
66 #include <compaterr.h>
69 #include <sys/vnode.h>
72 #include <ufs/fsdir.h>
73 #include <ufs/inode.h>
75 #include <ufs/ufs/dir.h>
76 #include <ufs/ufs/dinode.h>
77 #include <ufs/ffs/fs.h>
78 #endif /* __linux__ */
80 #include <protocols/dumprestore.h>
84 #define HASDUMPEDFILE 0x1
85 #define HASSUBDIRS 0x2
88 typedef u_quad_t fsizeT;
91 typedef quad_t fsizeT;
98 static int searchdir __P((struct ext2_dir_entry *dp, int offset,
99 int blocksize, char *buf, void *private));
101 static int dirindir __P((dump_ino_t ino, daddr_t blkno, int level, long *size));
102 static void dmpindir __P((dump_ino_t ino, daddr_t blk, int level, fsizeT *size));
103 static int searchdir __P((dump_ino_t ino, daddr_t blkno, long size, long filesize));
105 static void mapfileino __P((dump_ino_t ino, struct dinode const *dp, long *tapesize, int *dirskipped));
107 #ifdef HAVE_EXT2_JOURNAL_INUM
108 #define ext2_journal_ino(sb) (sb->s_journal_inum)
110 #define ext2_journal_ino(sb) (*((__u32 *)sb + 0x38))
112 #ifndef HAVE_EXT2_INO_T
113 typedef ino_t ext2_ino_t;
116 #ifndef EXT3_FEATURE_COMPAT_HAS_JOURNAL
117 #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
119 #ifndef EXT2_FEATURE_INCOMPAT_FILETYPE
120 #define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002
122 #ifndef EXT3_FEATURE_INCOMPAT_RECOVER
123 #define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004
125 #ifndef EXT3_FEATURE_INCOMPAT_JOURNAL_DEV
126 #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008
129 #ifndef EXT2_LIB_FEATURE_INCOMPAT_SUPP
130 #define EXT2_LIB_FEATURE_INCOMPAT_SUPP (EXT3_FEATURE_INCOMPAT_RECOVER | \
131 EXT2_FEATURE_INCOMPAT_FILETYPE)
133 #ifndef EXT2_RESIZE_INO
134 #define EXT2_RESIZE_INO 7
137 int dump_fs_open(const char *disk, ext2_filsys *fs)
141 retval = ext2fs_open(disk, EXT2_FLAG_FORCE, 0, 0, unix_io_manager, fs);
143 struct ext2_super_block *es = (*fs)->super;
144 dump_ino_t journal_ino = ext2_journal_ino(es);
146 if (es->s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV){
147 msg("This is a journal, not a filesystem!\n");
148 retval = EXT2_ET_UNSUPP_FEATURE;
151 else if ((retval = es->s_feature_incompat &
152 ~(EXT2_LIB_FEATURE_INCOMPAT_SUPP |
153 EXT3_FEATURE_INCOMPAT_RECOVER))) {
154 msg("Unsupported feature(s) 0x%x in filesystem\n",
156 retval = EXT2_ET_UNSUPP_FEATURE;
160 if (es->s_feature_compat &
161 EXT3_FEATURE_COMPAT_HAS_JOURNAL &&
163 do_exclude_ino(journal_ino, "journal inode");
164 do_exclude_ino(EXT2_RESIZE_INO, "resize inode");
171 * This is an estimation of the number of TP_BSIZE blocks in the file.
172 * It estimates the number of blocks in files with holes by assuming
173 * that all of the blocks accounted for by di_blocks are data blocks
174 * (when some of the blocks are usually used for indirect pointers);
175 * hence the estimate may be high.
178 blockest(struct dinode const *dp)
180 long blkest, sizeest;
184 * dp->di_size is the size of the file in bytes.
185 * dp->di_blocks stores the number of sectors actually in the file.
186 * If there are more sectors than the size would indicate, this just
187 * means that there are indirect blocks in the file or unused
188 * sectors in the last file block; we can safely ignore these
189 * (blkest = sizeest below).
190 * If the file is bigger than the number of sectors would indicate,
191 * then the file has holes in it. In this case we must use the
192 * block count to estimate the number of data blocks used, but
193 * we use the actual size for estimating the number of indirect
194 * dump blocks (sizeest vs. blkest in the indirect block
197 blkest = howmany((u_quad_t)dp->di_blocks*fs->blocksize, TP_BSIZE);
198 i_size = dp->di_size + ((u_quad_t) dp->di_size_high << 32);
199 sizeest = howmany(i_size, TP_BSIZE);
200 if (blkest > sizeest)
203 if (i_size > fs->blocksize * NDADDR) {
204 /* calculate the number of indirect blocks on the dump tape */
206 howmany(sizeest - NDADDR * fs->blocksize / TP_BSIZE,
207 NINDIR(sblock) * EXT2_FRAGS_PER_BLOCK(fs->super));
210 if (i_size > sblock->fs_bsize * NDADDR) {
211 /* calculate the number of indirect blocks on the dump tape */
213 howmany(sizeest - NDADDR * sblock->fs_bsize / TP_BSIZE,
220 /* Auxiliary macro to pick up files changed since previous dump. */
221 #define CSINCE(dp, t) \
222 ((dp)->di_ctime >= (t))
223 #define MSINCE(dp, t) \
224 ((dp)->di_mtime >= (t))
225 #define CHANGEDSINCE(dp, t) \
226 (CSINCE(dp, t) || MSINCE(dp, t))
228 /* The NODUMP_FLAG macro tests if a file has the nodump flag. */
230 #define NODUMP_FLAG(dp) (!nonodump && (((dp)->di_flags & UF_NODUMP) == UF_NODUMP))
232 #define NODUMP_FLAG(dp) 0
235 /* The WANTTODUMP macro decides whether a file should be dumped. */
236 #define WANTTODUMP(dp, ino) \
237 (CHANGEDSINCE(dp, spcl.c_ddate) && \
238 (!NODUMP_FLAG(dp)) && \
242 * Determine if given inode should be dumped. "dp" must either point to a
243 * copy of the given inode, or be NULL (in which case it is fetched.)
246 mapfileino(dump_ino_t ino, struct dinode const *dp, long *tapesize, int *dirskipped)
251 * Skip inode if we've already marked it for dumping
253 if (TSTINO(ino, usedinomap))
257 if ((mode = (dp->di_mode & IFMT)) == 0)
260 if (dp->di_nlink == 0 || dp->di_dtime != 0)
264 * Put all dirs in dumpdirmap, inodes that are to be dumped in the
265 * used map. All inode but dirs who have the nodump attribute go
268 SETINO(ino, usedinomap);
271 SETINO(ino, dumpdirmap);
272 if (WANTTODUMP(dp, ino)) {
273 SETINO(ino, dumpinomap);
274 if (!MSINCE(dp, spcl.c_ddate))
275 SETINO(ino, metainomap);
276 if (mode != IFREG && mode != IFDIR && mode != IFLNK)
279 *tapesize += blockest(dp);
283 if ( NODUMP_FLAG(dp) || exclude_ino(ino) )
284 CLRINO(ino, usedinomap);
292 * Walk the inode list for a filesystem to find all allocated inodes
293 * that have been modified since the previous dump time. Also, find all
294 * the directories in the filesystem.
298 mapfiles(dump_ino_t maxino, long *tapesize)
301 int anydirskipped = 0;
302 ext2_inode_scan scan;
304 struct ext2_inode inode;
307 * We use libext2fs's inode scanning routines, which are particularly
308 * robust. (Note that getino cannot return an error.)
310 err = ext2fs_open_inode_scan(fs, 0, &scan);
312 com_err(disk, err, "while opening inodes\n");
316 err = ext2fs_get_next_inode(scan, &ino, &inode);
317 if (err == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE)
320 com_err(disk, err, "while scanning inode #%ld\n",
328 mapfileino(ino, (struct dinode const *)&inode, tapesize,
331 ext2fs_close_inode_scan(scan);
334 * Restore gets very upset if the root is not dumped,
335 * so ensure that it always is dumped.
337 SETINO(ROOTINO, dumpinomap);
338 return (anydirskipped);
342 mapfiles(dump_ino_t maxino, long *tapesize)
345 int anydirskipped = 0;
347 for (ino = ROOTINO; ino < maxino; ino++)
348 mapfileino(ino, tapesize, &anydirskipped);
351 * Restore gets very upset if the root is not dumped,
352 * so ensure that it always is dumped.
354 SETINO(ROOTINO, dumpinomap);
355 return (anydirskipped);
357 #endif /* __linux__ */
361 maponefile(dump_ino_t maxino, long *tapesize, char *directory)
365 char dir_name [MAXPATHLEN];
366 int i, anydirskipped = 0;
369 * Mark every directory in the path as being dumped
371 for (i = 0; i < strlen (directory); i++) {
372 if (directory[i] == '/') {
373 strncpy (dir_name, directory, i);
375 retval = ext2fs_namei(fs, ROOTINO, ROOTINO,
378 com_err(disk, retval,
379 "while translating %s", dir_name);
382 mapfileino((dump_ino_t) dir_ino, 0,
383 tapesize, &anydirskipped);
387 * Mark the final directory
389 retval = ext2fs_namei(fs, ROOTINO, ROOTINO, directory, &dir_ino);
391 com_err(disk, retval, "while translating %s", directory);
394 mapfileino((dump_ino_t)dir_ino, 0, tapesize, &anydirskipped);
396 mapfileino(ROOTINO, 0, tapesize, &anydirskipped);
399 * Restore gets very upset if the root is not dumped,
400 * so ensure that it always is dumped.
402 SETINO(ROOTINO, dumpdirmap);
403 return anydirskipped;
405 #endif /* __linux__ */
408 struct mapfile_context {
414 mapfilesindir(struct ext2_dir_entry *dirent, int offset, int blocksize, char *buf, void *private)
416 struct dinode const *dp;
419 struct mapfile_context *mfc;
423 mfc = (struct mapfile_context *)private;
424 dp = getino(dirent->inode);
426 mapfileino(dirent->inode, dp, mfc->tapesize, mfc->anydirskipped);
428 mode = dp->di_mode & IFMT;
429 if (mode == IFDIR && dp->di_nlink != 0 && dp->di_dtime == 0) {
430 if ((dirent->name[0] != '.' || ( dirent->name_len & 0xFF ) != 1) &&
431 (dirent->name[0] != '.' || dirent->name[1] != '.' ||
432 ( dirent->name_len & 0xFF ) != 2)) {
433 retval = ext2fs_dir_iterate(fs, ino, 0, NULL,
434 mapfilesindir, private);
445 * Walk the inode list for a filesystem to find all allocated inodes
446 * that have been modified since the previous dump time. Also, find all
447 * the directories in the filesystem.
450 mapfilesfromdir(dump_ino_t maxino, long *tapesize, char *directory)
453 struct mapfile_context mfc;
455 char dir_name [MAXPATHLEN];
456 int i, anydirskipped = 0;
459 * Mark every directory in the path as being dumped
461 for (i = 0; i < strlen (directory); i++) {
462 if (directory[i] == '/') {
463 strncpy (dir_name, directory, i);
465 retval = ext2fs_namei(fs, ROOTINO, ROOTINO, dir_name,
468 com_err(disk, retval, "while translating %s",
472 mapfileino(dir_ino, 0, tapesize, &anydirskipped);
476 * Mark the final directory
478 retval = ext2fs_namei(fs, ROOTINO, ROOTINO, directory, &dir_ino);
480 com_err(disk, retval, "while translating %s", directory);
483 mapfileino(dir_ino, 0, tapesize, &anydirskipped);
485 mfc.tapesize = tapesize;
486 mfc.anydirskipped = &anydirskipped;
487 retval = ext2fs_dir_iterate(fs, dir_ino, 0, NULL, mapfilesindir,
491 com_err(disk, retval, "while mapping files in %s", directory);
495 * Ensure that the root inode actually appears in the file list
498 mapfileino(ROOTINO, 0, tapesize, &anydirskipped);
500 * Restore gets very upset if the root is not dumped,
501 * so ensure that it always is dumped.
503 SETINO(ROOTINO, dumpinomap);
504 return anydirskipped;
509 struct mapdirs_context {
519 * Scan each directory on the filesystem to see if it has any modified
520 * files in it. If it does, and has not already been added to the dump
521 * list (because it was itself modified), then add it. If a directory
522 * has not been modified itself, contains no modified files and has no
523 * subdirectories, then it can be deleted from the dump list and from
524 * the list of directories. By deleting it from the list of directories,
525 * its parent may now qualify for the same treatment on this or a later
526 * pass using this algorithm.
529 mapdirs(dump_ino_t maxino, long *tapesize)
539 struct mapdirs_context mdc;
541 int ret, change = 0, nodump;
543 isdir = 0; /* XXX just to get gcc to shut up */
544 for (map = dumpdirmap, ino = 1; ino < maxino; ino++) {
545 if (((ino - 1) % NBBY) == 0) /* map is offset by 1 */
550 * If dir has been removed from the used map, it's either
551 * because it had the nodump flag, or it herited it from
552 * its parent. A directory can't be in dumpinomap if not
553 * in usedinomap, but we have to go through it anyway
554 * to propagate the nodump attribute.
556 nodump = (TSTINO(ino, usedinomap) == 0);
557 if ((isdir & 1) == 0 ||
558 (TSTINO(ino, dumpinomap) && nodump == 0))
565 mdc.tapesize = tapesize;
566 ext2fs_dir_iterate(fs, ino, 0, NULL, searchdir, (void *) &mdc);
567 #else /* __linux__ */
568 filesize = dp->di_size;
569 for (ret = 0, i = 0; filesize > 0 && i < NDADDR; i++) {
570 if (dp->di_db[i] != 0)
571 ret |= searchdir(ino, dp->di_db[i],
572 (long)dblksize(sblock, dp, i),
574 if (ret & HASDUMPEDFILE)
577 filesize -= sblock->fs_bsize;
579 for (i = 0; filesize > 0 && i < NIADDR; i++) {
580 if (dp->di_ib[i] == 0)
582 ret |= dirindir(ino, dp->di_ib[i], i, &filesize);
584 #endif /* __linux__ */
585 if (ret & HASDUMPEDFILE) {
586 SETINO(ino, dumpinomap);
587 *tapesize += blockest(dp);
592 if (ret & HASSUBDIRS)
593 change = 1; /* subdirs have inherited nodump */
594 CLRINO(ino, dumpdirmap);
595 } else if ((ret & HASSUBDIRS) == 0) {
596 if (!TSTINO(ino, dumpinomap)) {
597 CLRINO(ino, dumpdirmap);
607 * Read indirect blocks, and pass the data blocks to be searched
608 * as directories. Quit as soon as any entry is found that will
609 * require the directory to be dumped.
612 dirindir(dump_ino_t ino, daddr_t blkno, int ind_level, long *filesize)
616 daddr_t idblk[MAXNINDIR];
618 bread(fsbtodb(sblock, blkno), (char *)idblk, (int)sblock->fs_bsize);
619 if (ind_level <= 0) {
620 for (i = 0; *filesize > 0 && i < NINDIR(sblock); i++) {
623 ret |= searchdir(ino, blkno, sblock->fs_bsize,
625 if (ret & HASDUMPEDFILE)
628 *filesize -= sblock->fs_bsize;
633 for (i = 0; *filesize > 0 && i < NINDIR(sblock); i++) {
636 ret |= dirindir(ino, blkno, ind_level, filesize);
640 #endif /* !__linux__ */
643 * Scan a disk block containing directory information looking to see if
644 * any of the entries are on the dump list and to see if the directory
645 * contains any subdirectories.
649 searchdir(struct ext2_dir_entry *dp, int offset, int blocksize, char *buf, void *private)
651 struct mapdirs_context *mdc;
656 mdc = (struct mapdirs_context *)private;
658 tapesize = mdc->tapesize;
662 if (dp->name[0] == '.') {
663 if (( dp->name_len & 0xFF ) == 1)
665 if (dp->name[1] == '.' && ( dp->name_len & 0xFF ) == 2)
669 ip = getino(dp->inode);
670 if (TSTINO(dp->inode, dumpinomap)) {
671 CLRINO(dp->inode, dumpinomap);
672 *tapesize -= blockest(ip);
674 /* Add dir back to the dir map and remove from
675 * usedinomap to propagate nodump */
676 if ((ip->di_mode & IFMT) == IFDIR) {
677 SETINO(dp->inode, dumpdirmap);
678 CLRINO(dp->inode, usedinomap);
682 if (TSTINO(dp->inode, dumpinomap)) {
683 *ret |= HASDUMPEDFILE;
684 if (*ret & HASSUBDIRS)
687 if (TSTINO(dp->inode, dumpdirmap)) {
689 if (*ret & HASDUMPEDFILE)
696 #else /* __linux__ */
699 searchdir(dump_ino_t ino, daddr_t blkno, long size, long filesize)
705 bread(fsbtodb(sblock, blkno), dblk, (int)size);
708 for (loc = 0; loc < size; ) {
709 dp = (struct direct *)(dblk + loc);
710 if (dp->d_reclen == 0) {
711 msg("corrupted directory, inumber %d\n", ino);
717 if (dp->d_name[0] == '.') {
718 if (dp->d_name[1] == '\0')
720 if (dp->d_name[1] == '.' && dp->d_name[2] == '\0')
723 if (TSTINO(dp->d_ino, dumpinomap)) {
724 ret |= HASDUMPEDFILE;
725 if (ret & HASSUBDIRS)
728 if (TSTINO(dp->d_ino, dumpdirmap)) {
730 if (ret & HASDUMPEDFILE)
736 #endif /* __linux__ */
740 struct block_context {
749 * Dump a block to the tape
752 dumponeblock(ext2_filsys fs, blk_t *blocknr, e2_blkcnt_t blockcnt,
753 blk_t ref_block, int ref_offset, void * private)
755 struct block_context *p;
758 if (blockcnt < NDADDR)
760 p = (struct block_context *)private;
761 for (i = p->next_block; i < blockcnt; i++) {
762 p->buf[p->cnt++] = 0;
763 if (p->cnt == p->max) {
764 blksout (p->buf, p->cnt, p->ino);
768 p->buf[p->cnt++] = *blocknr;
769 if (p->cnt == p->max) {
770 blksout (p->buf, p->cnt, p->ino);
773 p->next_block = blockcnt + 1;
779 * Dump passes 3 and 4.
781 * Dump the contents of an inode to tape.
784 dumpino(struct dinode *dp, dump_ino_t ino, int metaonly)
787 fsizeT size, remaining;
789 struct new_bsd_inode nbi;
792 struct block_context bc;
801 i_size = dp->di_size + ((u_quad_t) dp->di_size_high << 32);
805 dumpmap(dumpinomap, TS_BITS, ino);
807 CLRINO(ino, dumpinomap);
809 memset(&nbi, 0, sizeof(nbi));
810 nbi.di_mode = dp->di_mode;
811 nbi.di_nlink = dp->di_nlink;
812 nbi.di_ouid = dp->di_uid;
813 nbi.di_ogid = dp->di_gid;
814 nbi.di_size = i_size;
815 nbi.di_atime.tv_sec = dp->di_atime;
816 nbi.di_mtime.tv_sec = dp->di_mtime;
817 nbi.di_ctime.tv_sec = dp->di_ctime;
818 memmove(&nbi.di_db, &dp->di_db, (NDADDR + NIADDR) * sizeof(daddr_t));
819 nbi.di_flags = dp->di_flags;
820 nbi.di_blocks = dp->di_blocks;
821 nbi.di_gen = dp->di_gen;
822 nbi.di_uid = (((int32_t)dp->di_uidhigh) << 16) | dp->di_uid;
823 nbi.di_gid = (((int32_t)dp->di_gidhigh) << 16) | dp->di_gid;
825 warn("ACLs in inode #%ld won't be dumped", (long)ino);
826 memmove(&spcl.c_dinode, &nbi, sizeof(nbi));
827 #else /* __linux__ */
829 #endif /* __linux__ */
830 spcl.c_type = TS_INODE;
833 if (metaonly && (dp->di_mode & S_IFMT)) {
834 spcl.c_flags |= DR_METAONLY;
837 spcl.c_flags &= ~DR_METAONLY;
841 switch (dp->di_mode & S_IFMT) {
851 msg("Warning: dumpino called on a directory (ino %d)\n", ino);
857 * Check for short symbolic link.
861 i_size < EXT2_N_BLOCKS * sizeof (daddr_t)) {
865 memmove(buf, dp->di_db, (u_long)dp->di_size);
866 buf[dp->di_size] = '\0';
870 #endif /* __linux__ */
872 if (dp->di_size > 0 &&
873 dp->di_size < sblock->fs_maxsymlinklen) {
877 memmove(buf, dp->di_shortlink, (u_long)dp->di_size);
878 buf[dp->di_size] = '\0';
901 msg("Warning: undefined file type 0%o\n", dp->di_mode & IFMT);
904 if (i_size > NDADDR * sblock->fs_bsize)
906 cnt = NDADDR * EXT2_FRAGS_PER_BLOCK(fs->super);
908 cnt = NDADDR * sblock->fs_frag;
911 cnt = howmany(i_size, sblock->fs_fsize);
912 blksout(&dp->di_db[0], cnt, ino);
913 if ((quad_t) (size = i_size - NDADDR * sblock->fs_bsize) <= 0)
916 bc.max = NINDIR(sblock) * EXT2_FRAGS_PER_BLOCK(fs->super);
917 bc.buf = (int *)malloc (bc.max * sizeof (int));
920 bc.next_block = NDADDR;
922 ext2fs_block_iterate2(fs, (ext2_ino_t)ino, 0, NULL, dumponeblock, (void *)&bc);
923 /* deal with holes at the end of the inode */
924 if (i_size > ((u_quad_t)bc.next_block) * sblock->fs_fsize) {
925 remaining = i_size - ((u_quad_t)bc.next_block) * sblock->fs_fsize;
926 for (i = 0; i < howmany(remaining, sblock->fs_fsize); i++) {
927 bc.buf[bc.cnt++] = 0;
928 if (bc.cnt == bc.max) {
929 blksout (bc.buf, bc.cnt, bc.ino);
935 blksout (bc.buf, bc.cnt, bc.ino);
939 for (ind_level = 0; ind_level < NIADDR; ind_level++) {
940 dmpindir(ino, dp->di_ib[ind_level], ind_level, &size);
949 struct convert_dir_context {
957 * This function converts an ext2fs directory entry to the BSD format.
959 * Basically, it adds a null-character at the end of the name, recomputes the
960 * size of the entry, and creates it in a temporary buffer
963 convert_dir(struct ext2_dir_entry *dirent, int offset, int blocksize, char *buf, void *private)
965 struct convert_dir_context *p;
969 p = (struct convert_dir_context *)private;
971 reclen = EXT2_DIR_REC_LEN((dirent->name_len & 0xFF) + 1);
972 if (((p->offset + reclen - 1) / p->bs) != (p->offset / p->bs)) {
973 dp = (struct direct *)(p->buf + p->prev_offset);
974 dp->d_reclen += p->bs - (p->offset % p->bs);
975 p->offset += p->bs - (p->offset % p->bs);
978 dp = (struct direct *)(p->buf + p->offset);
979 dp->d_ino = dirent->inode;
980 dp->d_reclen = reclen;
981 dp->d_namlen = dirent->name_len & 0xFF;
982 strncpy(dp->d_name, dirent->name, dp->d_namlen);
983 dp->d_name[dp->d_namlen] = '\0';
984 p->prev_offset = p->offset;
993 * Dumps a directory to tape after converting it to the BSD format
996 dumpdirino(struct dinode *dp, dump_ino_t ino)
1000 struct new_bsd_inode nbi;
1001 struct convert_dir_context cdc;
1003 struct ext2_dir_entry *de;
1008 dumpmap(dumpinomap, TS_BITS, ino);
1010 CLRINO(ino, dumpinomap);
1013 * Convert the directory to the BSD format
1015 /* Allocate a buffer for the conversion (twice the size of the
1016 ext2fs directory to avoid problems ;-) */
1017 cdc.buf = (char *)malloc(dp->di_size * 2 * sizeof(char));
1018 if (cdc.buf == NULL)
1019 err(1, "Cannot allocate buffer to convert directory #%lu\n",
1020 (unsigned long)ino);
1022 cdc.prev_offset = 0;
1023 cdc.bs = MIN(DIRBLKSIZ, TP_BSIZE);
1024 /* Do the conversion */
1025 retval = ext2fs_dir_iterate(fs, (ext2_ino_t)ino, 0, NULL, convert_dir, (void *)&cdc);
1027 com_err(disk, retval, "while converting directory #%ld\n", (long)ino);
1030 /* Fix the last entry */
1031 if ((cdc.offset % cdc.bs) != 0) {
1032 de = (struct ext2_dir_entry *)(cdc.buf + cdc.prev_offset);
1033 de->rec_len += cdc.bs - (cdc.offset % cdc.bs);
1034 cdc.offset += cdc.bs - (cdc.offset % cdc.bs);
1037 dir_size = cdc.offset;
1040 memset(&nbi, 0, sizeof(nbi));
1041 nbi.di_mode = dp->di_mode;
1042 nbi.di_nlink = dp->di_nlink;
1043 nbi.di_ouid = dp->di_uid;
1044 nbi.di_ogid = dp->di_gid;
1045 nbi.di_size = dir_size; /* (u_quad_t)dp->di_size; */
1046 nbi.di_atime.tv_sec = dp->di_atime;
1047 nbi.di_mtime.tv_sec = dp->di_mtime;
1048 nbi.di_ctime.tv_sec = dp->di_ctime;
1049 memmove(&nbi.di_db, &dp->di_db, (NDADDR + NIADDR) * sizeof(daddr_t));
1050 nbi.di_flags = dp->di_flags;
1051 nbi.di_blocks = dp->di_blocks;
1052 nbi.di_gen = dp->di_gen;
1053 nbi.di_uid = (((int32_t)dp->di_uidhigh) << 16) | dp->di_uid;
1054 nbi.di_gid = (((int32_t)dp->di_gidhigh) << 16) | dp->di_gid;
1055 if (dp->di_file_acl)
1056 warn("ACLs in inode #%ld won't be dumped", (long)ino);
1057 memmove(&spcl.c_dinode, &nbi, sizeof(nbi));
1058 #else /* __linux__ */
1059 spcl.c_dinode = *dp;
1060 #endif /* __linux__ */
1061 spcl.c_type = TS_INODE;
1063 switch (dp->di_mode & S_IFMT) {
1074 msg("Warning: size of directory inode #%d is <= 0 (%d)!\n",
1079 msg("Warning: dumpdirino called with file type 0%o (inode #%d)\n",
1080 dp->di_mode & IFMT, ino);
1083 for (size = 0; size < dir_size; size += TP_BSIZE) {
1087 memmove(buf, cdc.buf + size, TP_BSIZE);
1089 spcl.c_type = TS_ADDR;
1092 (void)free(cdc.buf);
1094 #endif /* __linux__ */
1098 * Read indirect blocks, and pass the data blocks to be dumped.
1101 dmpindir(dump_ino_t ino, daddr_t blk, int ind_level, fsizeT *size)
1108 daddr_t idblk[MAXNINDIR];
1111 bread(fsbtodb(sblock, blk), (char *)idblk, (int) sblock->fs_bsize);
1114 * My RedHat 4.0 system doesn't have these flags; I haven't
1115 * upgraded e2fsprogs yet
1117 #if defined(EXT2_FLAG_SWAP_BYTES)
1118 if ((fs->flags & EXT2_FLAG_SWAP_BYTES) ||
1119 (fs->flags & EXT2_FLAG_SWAP_BYTES_READ))
1122 max = sblock->fs_bsize >> 2;
1123 swapme = (blk_t *) idblk;
1124 for (i = 0; i < max; i++, swapme++)
1125 *swapme = ext2fs_swab32(*swapme);
1127 #endif /* __linux__ */
1129 memset(idblk, 0, (int)sblock->fs_bsize);
1130 if (ind_level <= 0) {
1131 if (*size < NINDIR(sblock) * sblock->fs_bsize)
1132 cnt = howmany(*size, sblock->fs_fsize);
1135 cnt = NINDIR(sblock) * EXT2_FRAGS_PER_BLOCK(fs->super);
1137 cnt = NINDIR(sblock) * sblock->fs_frag;
1139 *size -= NINDIR(sblock) * sblock->fs_bsize;
1140 blksout(&idblk[0], cnt, ino);
1144 for (i = 0; i < NINDIR(sblock); i++) {
1145 dmpindir(ino, idblk[i], ind_level, size);
1153 * Collect up the data into tape record sized buffers and output them.
1156 blksout(daddr_t *blkp, int frags, dump_ino_t ino)
1159 int i, j, count, blks, tbperdb;
1161 blks = howmany(frags * sblock->fs_fsize, TP_BSIZE);
1162 tbperdb = sblock->fs_bsize >> tp_bshift;
1163 for (i = 0; i < blks; i += TP_NINDIR) {
1164 if (i + TP_NINDIR > blks)
1167 count = i + TP_NINDIR;
1168 for (j = i; j < count; j++)
1169 if (blkp[j / tbperdb] != 0)
1170 spcl.c_addr[j - i] = 1;
1172 spcl.c_addr[j - i] = 0;
1173 spcl.c_count = count - i;
1175 bp = &blkp[i / tbperdb];
1176 for (j = i; j < count; j += tbperdb, bp++) {
1178 if (j + tbperdb <= count)
1179 dumpblock(*bp, (int)sblock->fs_bsize);
1181 dumpblock(*bp, (count - j) * TP_BSIZE);
1184 spcl.c_type = TS_ADDR;
1189 * Dump a map to the tape.
1192 dumpmap(char *map, int type, dump_ino_t ino)
1198 spcl.c_count = howmany(mapsize * sizeof(char), TP_BSIZE);
1200 for (i = 0, cp = map; i < spcl.c_count; i++, cp += TP_BSIZE)
1204 #if defined __linux__ && !defined(int32_t)
1205 #define int32_t __s32
1209 * Compute and fill in checksum information.
1212 mkchecksum(union u_spcl *tmpspcl)
1214 int32_t sum, cnt, *lp;
1216 tmpspcl->s_spcl.c_checksum = 0;
1217 lp = (int32_t *)&tmpspcl->s_spcl;
1219 cnt = sizeof(union u_spcl) / (4 * sizeof(int32_t));
1220 while (--cnt >= 0) {
1226 tmpspcl->s_spcl.c_checksum = CHECKSUM - sum;
1230 * Write a header record to the dump tape.
1233 writeheader(dump_ino_t ino)
1235 spcl.c_inumber = ino;
1236 spcl.c_magic = NFS_MAGIC;
1237 mkchecksum((union u_spcl *)&spcl);
1238 writerec((char *)&spcl, 1);
1243 getino(dump_ino_t inum)
1245 static struct dinode dinode;
1249 err = ext2fs_read_inode(fs, (ext2_ino_t)inum, (struct ext2_inode *) &dinode);
1251 com_err(disk, err, "while reading inode #%ld\n", (long)inum);
1256 #else /* __linux__ */
1258 getino(dump_ino_t inum)
1260 static daddr_t minino, maxino;
1261 static struct dinode inoblock[MAXINOPB];
1264 if (inum >= minino && inum < maxino)
1265 return (&inoblock[inum - minino]);
1266 bread(fsbtodb(sblock, ino_to_fsba(sblock, inum)), (char *)inoblock,
1267 (int)sblock->fs_bsize);
1268 minino = inum - (inum % INOPB(sblock));
1269 maxino = minino + INOPB(sblock);
1270 return (&inoblock[inum - minino]);
1272 #endif /* __linux__ */
1275 * Read a chunk of data from the disk.
1276 * Try to recover from hard errors by reading in sector sized pieces.
1277 * Error recovery is attempted at most breademax times before seeking
1278 * consent from the operator to continue.
1280 int breaderrors = 0;
1283 bread(daddr_t blkno, char *buf, int size)
1289 if (ext2fs_llseek(diskfd, (((ext2_loff_t)blkno) << dev_bshift), 0) !=
1290 (((ext2_loff_t)blkno) << dev_bshift))
1292 if (lseek(diskfd, ((off_t)blkno << dev_bshift), 0) !=
1293 ((off_t)blkno << dev_bshift))
1295 msg("bread: lseek fails\n");
1296 if ((cnt = read(diskfd, buf, size)) == size)
1298 if (blkno + (size / dev_bsize) > fsbtodb(sblock, sblock->fs_size)) {
1300 * Trying to read the final fragment.
1302 * NB - dump only works in TP_BSIZE blocks, hence
1303 * rounds `dev_bsize' fragments up to TP_BSIZE pieces.
1304 * It should be smarter about not actually trying to
1305 * read more than it can get, but for the time being
1306 * we punt and scale back the read only when it gets
1307 * us into trouble. (mkm 9/25/83)
1313 msg("read error from %s: %s: [block %d, ext2blk %d]: count=%d\n",
1314 disk, strerror(errno), blkno,
1315 dbtofsb(sblock, blkno), size);
1317 msg("short read error from %s: [block %d, ext2blk %d]: count=%d, got=%d\n",
1318 disk, blkno, dbtofsb(sblock, blkno), size, cnt);
1319 if (++breaderrors > breademax) {
1320 msg("More than %d block read errors from %d\n",
1322 broadcast("DUMP IS AILING!\n");
1323 msg("This is an unrecoverable error.\n");
1324 if (!query("Do you want to attempt to continue?")){
1331 * Zero buffer, then try to read each sector of buffer separately.
1333 memset(buf, 0, size);
1334 for (i = 0; i < size; i += dev_bsize, buf += dev_bsize, blkno++) {
1336 if (ext2fs_llseek(diskfd, (((ext2_loff_t)blkno) << dev_bshift), 0) !=
1337 (((ext2_loff_t)blkno) << dev_bshift))
1339 if (lseek(diskfd, ((off_t)blkno << dev_bshift), 0) !=
1340 ((off_t)blkno << dev_bshift))
1342 msg("bread: lseek2 fails!\n");
1343 if ((cnt = read(diskfd, buf, (int)dev_bsize)) == dev_bsize)
1346 msg("read error from %s: %s: [sector %d, ext2blk %d]: count=%d\n",
1347 disk, strerror(errno), blkno,
1348 dbtofsb(sblock, blkno), dev_bsize);
1351 msg("short read error from %s: [sector %d, ext2blk %d]: count=%d, got=%d\n",
1352 disk, blkno, dbtofsb(sblock, blkno), dev_bsize, cnt);