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
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
44 static char sccsid
[] = "@(#)traverse.c 8.7 (Berkeley) 6/15/95";
46 static const char rcsid
[] =
47 "$Id: traverse.c,v 1.3 1999/10/11 12:59:19 stelian Exp $";
50 #include <sys/param.h>
53 #include <linux/ext2_fs.h>
54 #include <bsdcompat.h>
55 #include <compaterr.h>
57 #define swab32(x) ext2fs_swab32(x)
61 #include <sys/vnode.h>
64 #include <ufs/fsdir.h>
65 #include <ufs/inode.h>
67 #include <ufs/ufs/dir.h>
68 #include <ufs/ufs/dinode.h>
69 #include <ufs/ffs/fs.h>
71 #endif /* __linux__ */
73 #include <protocols/dumprestore.h>
83 #include <ext2fs/ext2fs.h>
88 #define HASDUMPEDFILE 0x1
89 #define HASSUBDIRS 0x2
92 typedef quad_t fsizeT
;
98 static int searchdir
__P((struct ext2_dir_entry
*dp
, int offset
,
99 int blocksize
, char *buf
, void *private));
100 loff_t
llseek (int fd
, loff_t offset
, int origin
);
102 static int dirindir
__P((ino_t ino
, daddr_t blkno
, int level
, long *size
));
103 static void dmpindir
__P((ino_t ino
, daddr_t blk
, int level
, fsizeT
*size
));
104 static int searchdir
__P((ino_t ino
, daddr_t blkno
, long size
, long filesize
));
108 * This is an estimation of the number of TP_BSIZE blocks in the file.
109 * It estimates the number of blocks in files with holes by assuming
110 * that all of the blocks accounted for by di_blocks are data blocks
111 * (when some of the blocks are usually used for indirect pointers);
112 * hence the estimate may be high.
115 blockest(struct dinode
*dp
)
117 long blkest
, sizeest
;
120 * dp->di_size is the size of the file in bytes.
121 * dp->di_blocks stores the number of sectors actually in the file.
122 * If there are more sectors than the size would indicate, this just
123 * means that there are indirect blocks in the file or unused
124 * sectors in the last file block; we can safely ignore these
125 * (blkest = sizeest below).
126 * If the file is bigger than the number of sectors would indicate,
127 * then the file has holes in it. In this case we must use the
128 * block count to estimate the number of data blocks used, but
129 * we use the actual size for estimating the number of indirect
130 * dump blocks (sizeest vs. blkest in the indirect block
133 blkest
= howmany(dbtob(dp
->di_blocks
), TP_BSIZE
);
134 sizeest
= howmany(dp
->di_size
, TP_BSIZE
);
135 if (blkest
> sizeest
)
138 if (dp
->di_size
> fs
->blocksize
* NDADDR
) {
139 /* calculate the number of indirect blocks on the dump tape */
141 howmany(sizeest
- NDADDR
* fs
->blocksize
/ TP_BSIZE
,
145 if (dp
->di_size
> sblock
->fs_bsize
* NDADDR
) {
146 /* calculate the number of indirect blocks on the dump tape */
148 howmany(sizeest
- NDADDR
* sblock
->fs_bsize
/ TP_BSIZE
,
155 /* Auxiliary macro to pick up files changed since previous dump. */
156 #define CHANGEDSINCE(dp, t) \
157 ((dp)->di_mtime >= (t) || (dp)->di_ctime >= (t))
159 /* The WANTTODUMP macro decides whether a file should be dumped. */
161 #define WANTTODUMP(dp) \
162 (CHANGEDSINCE(dp, spcl.c_ddate) && \
163 (nonodump || ((dp)->di_flags & UF_NODUMP) != UF_NODUMP))
165 #define WANTTODUMP(dp) CHANGEDSINCE(dp, spcl.c_ddate)
171 * Walk the inode list for a filesystem to find all allocated inodes
172 * that have been modified since the previous dump time. Also, find all
173 * the directories in the filesystem.
176 mapfiles(ino_t maxino
, long *tapesize
)
180 register struct dinode
*dp
;
181 int anydirskipped
= 0;
183 for (ino
= ROOTINO
; ino
< maxino
; ino
++) {
185 if ((mode
= (dp
->di_mode
& IFMT
)) == 0)
188 if (dp
->di_nlink
== 0 || dp
->di_dtime
!= 0)
191 SETINO(ino
, usedinomap
);
193 SETINO(ino
, dumpdirmap
);
194 if (WANTTODUMP(dp
)) {
195 SETINO(ino
, dumpinomap
);
196 if (mode
!= IFREG
&& mode
!= IFDIR
&& mode
!= IFLNK
)
199 *tapesize
+= blockest(dp
);
206 * Restore gets very upset if the root is not dumped,
207 * so ensure that it always is dumped.
209 SETINO(ROOTINO
, dumpinomap
);
210 return (anydirskipped
);
214 struct mapfile_context
{
220 mapfilesindir(struct ext2_dir_entry
*dirent
, int offset
, int blocksize
, char *buf
, void *private)
222 register struct dinode
*dp
;
226 struct mapfile_context
*mfc
;
229 mfc
= (struct mapfile_context
*)private;
231 if ((mode
= (dp
->di_mode
& IFMT
)) != 0 &&
232 dp
->di_nlink
!= 0 && dp
->di_dtime
== 0) {
233 SETINO(ino
, usedinomap
);
235 SETINO(ino
, dumpdirmap
);
236 if (WANTTODUMP(dp
)) {
237 SETINO(ino
, dumpinomap
);
238 if (mode
!= IFREG
&& mode
!= IFDIR
&& mode
!= IFLNK
)
241 *mfc
->tapesize
+= blockest(dp
);
244 mfc
->anydirskipped
= 1;
245 if ((dirent
->name
[0] != '.' || dirent
->name_len
!= 1) &&
246 (dirent
->name
[0] != '.' || dirent
->name
[1] != '.' ||
247 dirent
->name_len
!= 2)) {
248 retval
= ext2fs_dir_iterate(fs
, ino
, 0, NULL
,
249 mapfilesindir
, private);
261 * Walk the inode list for a filesystem to find all allocated inodes
262 * that have been modified since the previous dump time. Also, find all
263 * the directories in the filesystem.
266 mapfilesfromdir(ino_t maxino
, long *tapesize
, char *directory
)
269 struct mapfile_context mfc
;
271 char dir_name
[MAXPATHLEN
];
275 * Mark every directory in the path as being dumped
277 for (i
= 0; i
< strlen (directory
); i
++) {
278 if (directory
[i
] == '/') {
279 strncpy (dir_name
, directory
, i
);
281 retval
= ext2fs_namei(fs
, ROOTINO
, ROOTINO
, dir_name
,
284 com_err(disk
, retval
, "while translating %s",
288 /* SETINO(dir_ino, dumpinomap); */
289 SETINO(dir_ino
, dumpdirmap
);
293 * Mark the final directory
295 retval
= ext2fs_namei(fs
, ROOTINO
, ROOTINO
, directory
, &dir_ino
);
297 com_err(disk
, retval
, "while translating %s", directory
);
300 /* SETINO(dir_ino, dumpinomap); */
301 SETINO(dir_ino
, dumpdirmap
);
303 mfc
.tapesize
= tapesize
;
304 mfc
.anydirskipped
= 0;
305 retval
= ext2fs_dir_iterate(fs
, dir_ino
, 0, NULL
, mapfilesindir
,
309 com_err(disk
, retval
, "while mapping files in %s", directory
);
313 * Restore gets very upset if the root is not dumped,
314 * so ensure that it always is dumped.
316 /* SETINO(ROOTINO, dumpinomap); */
317 SETINO(ROOTINO
, dumpdirmap
);
318 return (mfc
.anydirskipped
);
325 * Scan each directory on the filesystem to see if it has any modified
326 * files in it. If it does, and has not already been added to the dump
327 * list (because it was itself modified), then add it. If a directory
328 * has not been modified itself, contains no modified files and has no
329 * subdirectories, then it can be deleted from the dump list and from
330 * the list of directories. By deleting it from the list of directories,
331 * its parent may now qualify for the same treatment on this or a later
332 * pass using this algorithm.
335 mapdirs(ino_t maxino
, long *tapesize
)
337 register struct dinode
*dp
;
347 isdir
= 0; /* XXX just to get gcc to shut up */
348 for (map
= dumpdirmap
, ino
= 1; ino
< maxino
; ino
++) {
349 if (((ino
- 1) % NBBY
) == 0) /* map is offset by 1 */
353 if ((isdir
& 1) == 0 || TSTINO(ino
, dumpinomap
))
358 ext2fs_dir_iterate(fs
, ino
, 0, NULL
, searchdir
, (void *) &ret
);
359 #else /* __linux__ */
360 filesize
= dp
->di_size
;
361 for (ret
= 0, i
= 0; filesize
> 0 && i
< NDADDR
; i
++) {
362 if (dp
->di_db
[i
] != 0)
363 ret
|= searchdir(ino
, dp
->di_db
[i
],
364 (long)dblksize(sblock
, dp
, i
),
366 if (ret
& HASDUMPEDFILE
)
369 filesize
-= sblock
->fs_bsize
;
371 for (i
= 0; filesize
> 0 && i
< NIADDR
; i
++) {
372 if (dp
->di_ib
[i
] == 0)
374 ret
|= dirindir(ino
, dp
->di_ib
[i
], i
, &filesize
);
376 #endif /* __linux__ */
377 if (ret
& HASDUMPEDFILE
) {
378 SETINO(ino
, dumpinomap
);
379 *tapesize
+= blockest(dp
);
383 if ((ret
& HASSUBDIRS
) == 0) {
384 if (!TSTINO(ino
, dumpinomap
)) {
385 CLRINO(ino
, dumpdirmap
);
395 * Read indirect blocks, and pass the data blocks to be searched
396 * as directories. Quit as soon as any entry is found that will
397 * require the directory to be dumped.
400 dirindir(ino_t ino
, daddr_t blkno
, int ind_level
, long *filesize
)
404 daddr_t idblk
[MAXNINDIR
];
406 bread(fsbtodb(sblock
, blkno
), (char *)idblk
, (int)sblock
->fs_bsize
);
407 if (ind_level
<= 0) {
408 for (i
= 0; *filesize
> 0 && i
< NINDIR(sblock
); i
++) {
411 ret
|= searchdir(ino
, blkno
, sblock
->fs_bsize
,
413 if (ret
& HASDUMPEDFILE
)
416 *filesize
-= sblock
->fs_bsize
;
421 for (i
= 0; *filesize
> 0 && i
< NINDIR(sblock
); i
++) {
424 ret
|= dirindir(ino
, blkno
, ind_level
, filesize
);
428 #endif /* !__linux__ */
431 * Scan a disk block containing directory information looking to see if
432 * any of the entries are on the dump list and to see if the directory
433 * contains any subdirectories.
437 searchdir(struct ext2_dir_entry
*dp
, int offset
, int blocksize
, char *buf
, void *private)
439 int *ret
= (int *) private;
443 if (dp
->name
[0] == '.') {
444 if (dp
->name_len
== 1)
446 if (dp
->name
[1] == '.' && dp
->name_len
== 2)
449 if (TSTINO(dp
->inode
, dumpinomap
)) {
450 *ret
|= HASDUMPEDFILE
;
451 if (*ret
& HASSUBDIRS
)
454 if (TSTINO(dp
->inode
, dumpdirmap
)) {
456 if (*ret
& HASDUMPEDFILE
)
462 #else /* __linux__ */
465 searchdir(ino_t ino
, daddr_t blkno
, long size
, long filesize
)
467 register struct direct
*dp
;
468 register long loc
, ret
= 0;
471 bread(fsbtodb(sblock
, blkno
), dblk
, (int)size
);
474 for (loc
= 0; loc
< size
; ) {
475 dp
= (struct direct
*)(dblk
+ loc
);
476 if (dp
->d_reclen
== 0) {
477 msg("corrupted directory, inumber %d\n", ino
);
483 if (dp
->d_name
[0] == '.') {
484 if (dp
->d_name
[1] == '\0')
486 if (dp
->d_name
[1] == '.' && dp
->d_name
[2] == '\0')
489 if (TSTINO(dp
->d_ino
, dumpinomap
)) {
490 ret
|= HASDUMPEDFILE
;
491 if (ret
& HASSUBDIRS
)
494 if (TSTINO(dp
->d_ino
, dumpdirmap
)) {
496 if (ret
& HASDUMPEDFILE
)
502 #endif /* __linux__ */
506 struct block_context
{
515 * Dump a block to the tape
518 dumponeblock(ext2_filsys fs
, blk_t
*blocknr
, int blockcnt
, void *private)
520 struct block_context
*p
;
523 if (blockcnt
< NDADDR
)
525 p
= (struct block_context
*)private;
526 for (i
= p
->next_block
; i
< blockcnt
; i
++) {
527 p
->buf
[p
->cnt
++] = 0;
528 if (p
->cnt
== p
->max
) {
529 blksout (p
->buf
, p
->cnt
, p
->ino
);
533 p
->buf
[p
->cnt
++] = *blocknr
;
534 if (p
->cnt
== p
->max
) {
535 blksout (p
->buf
, p
->cnt
, p
->ino
);
538 p
->next_block
= blockcnt
+ 1;
544 * Dump passes 3 and 4.
546 * Dump the contents of an inode to tape.
549 dumpino(struct dinode
*dp
, ino_t ino
)
554 struct old_bsd_inode obi
;
556 struct block_context bc
;
563 dumpmap(dumpinomap
, TS_BITS
, ino
);
565 CLRINO(ino
, dumpinomap
);
567 memset(&obi
, 0, sizeof(obi
));
568 obi
.di_mode
= dp
->di_mode
;
569 obi
.di_uid
= dp
->di_uid
;
570 obi
.di_gid
= dp
->di_gid
;
571 obi
.di_qsize
.v
= (u_quad_t
)dp
->di_size
;
572 obi
.di_atime
= dp
->di_atime
;
573 obi
.di_mtime
= dp
->di_mtime
;
574 obi
.di_ctime
= dp
->di_ctime
;
575 obi
.di_nlink
= dp
->di_nlink
;
576 obi
.di_blocks
= dp
->di_blocks
;
577 obi
.di_flags
= dp
->di_flags
;
578 obi
.di_gen
= dp
->di_gen
;
579 memmove(&obi
.di_db
, &dp
->di_db
, (NDADDR
+ NIADDR
) * sizeof(daddr_t
));
580 if (dp
->di_file_acl
|| dp
->di_dir_acl
)
581 warn("ACLs in inode #%ld won't be dumped", ino
);
582 memmove(&spcl
.c_dinode
, &obi
, sizeof(obi
));
583 #else /* __linux__ */
585 #endif /* __linux__ */
586 spcl
.c_type
= TS_INODE
;
588 switch (dp
->di_mode
& S_IFMT
) {
598 msg("Warning: dumpino called on a directory (ino %d)\n", ino
);
604 * Check for short symbolic link.
607 if (dp
->di_size
> 0 &&
608 dp
->di_size
< EXT2_N_BLOCKS
* sizeof (daddr_t
)) {
612 memmove(buf
, dp
->di_db
, (u_long
)dp
->di_size
);
613 buf
[dp
->di_size
] = '\0';
617 #endif /* __linux__ */
619 if (dp
->di_size
> 0 &&
620 dp
->di_size
< sblock
->fs_maxsymlinklen
) {
624 memmove(buf
, dp
->di_shortlink
, (u_long
)dp
->di_size
);
625 buf
[dp
->di_size
] = '\0';
648 msg("Warning: undefined file type 0%o\n", dp
->di_mode
& IFMT
);
651 if (dp
->di_size
> NDADDR
* sblock
->fs_bsize
)
653 cnt
= NDADDR
* EXT2_FRAGS_PER_BLOCK(fs
->super
);
655 cnt
= NDADDR
* sblock
->fs_frag
;
658 cnt
= howmany(dp
->di_size
, sblock
->fs_fsize
);
659 blksout(&dp
->di_db
[0], cnt
, ino
);
660 if ((size
= dp
->di_size
- NDADDR
* sblock
->fs_bsize
) <= 0)
663 bc
.max
= NINDIR(sblock
) * EXT2_FRAGS_PER_BLOCK(fs
->super
);
664 bc
.buf
= (int *)malloc (bc
.max
* sizeof (int));
667 bc
.next_block
= NDADDR
;
669 ext2fs_block_iterate (fs
, ino
, 0, NULL
, dumponeblock
, (void *)&bc
);
671 blksout (bc
.buf
, bc
.cnt
, bc
.ino
);
674 for (ind_level
= 0; ind_level
< NIADDR
; ind_level
++) {
675 dmpindir(ino
, dp
->di_ib
[ind_level
], ind_level
, &size
);
684 struct convert_dir_context
{
692 * This function converts an ext2fs directory entry to the BSD format.
694 * Basically, it adds a null-character at the end of the name, recomputes the
695 * size of the entry, and creates it in a temporary buffer
698 convert_dir(struct ext2_dir_entry
*dirent
, int offset
, int blocksize
, char *buf
, void *private)
700 struct convert_dir_context
*p
;
704 p
= (struct convert_dir_context
*)private;
706 reclen
= EXT2_DIR_REC_LEN(dirent
->name_len
+ 1);
707 if (((p
->offset
+ reclen
- 1) / p
->bs
) != (p
->offset
/ p
->bs
)) {
708 dp
= (struct direct
*)(p
->buf
+ p
->prev_offset
);
709 dp
->d_reclen
+= p
->bs
- (p
->offset
% p
->bs
);
710 p
->offset
+= p
->bs
- (p
->offset
% p
->bs
);
713 dp
= (struct direct
*)(p
->buf
+ p
->offset
);
714 dp
->d_ino
= dirent
->inode
;
715 dp
->d_reclen
= reclen
;
717 dp
->d_namlen
= dirent
->name_len
;
718 strncpy(dp
->d_name
, dirent
->name
, dirent
->name_len
);
719 dp
->d_name
[dp
->d_namlen
] = '\0';
720 p
->prev_offset
= p
->offset
;
729 * Dumps a directory to tape after converting it to the BSD format
732 dumpdirino(struct dinode
*dp
, ino_t ino
)
736 struct old_bsd_inode obi
;
737 struct convert_dir_context cdc
;
739 struct ext2_dir_entry
*de
;
744 dumpmap(dumpinomap
, TS_BITS
, ino
);
746 CLRINO(ino
, dumpinomap
);
749 * Convert the directory to the BSD format
751 /* Allocate a buffer for the conversion (twice the size of the
752 ext2fs directory to avoid problems ;-) */
753 cdc
.buf
= (char *)malloc(dp
->di_size
* 2 * sizeof(char));
755 err(1, "Cannot allocate buffer to convert directory #%lu\n",
759 cdc
.bs
= MIN(DIRBLKSIZ
, TP_BSIZE
);
760 /* Do the conversion */
761 retval
= ext2fs_dir_iterate(fs
, ino
, 0, NULL
, convert_dir
, (void *)&cdc
);
763 com_err(disk
, retval
, "while converting directory #%ld\n", ino
);
766 /* Fix the last entry */
767 if ((cdc
.offset
% cdc
.bs
) != 0) {
768 de
= (struct ext2_dir_entry
*)(cdc
.buf
+ cdc
.prev_offset
);
769 de
->rec_len
+= cdc
.bs
- (cdc
.offset
% cdc
.bs
);
770 cdc
.offset
+= cdc
.bs
- (cdc
.offset
% cdc
.bs
);
773 dir_size
= cdc
.offset
;
776 memset(&obi
, 0, sizeof(obi
));
777 obi
.di_mode
= dp
->di_mode
;
778 obi
.di_uid
= dp
->di_uid
;
779 obi
.di_gid
= dp
->di_gid
;
780 obi
.di_qsize
.v
= dir_size
; /* (u_quad_t)dp->di_size; */
781 obi
.di_atime
= dp
->di_atime
;
782 obi
.di_mtime
= dp
->di_mtime
;
783 obi
.di_ctime
= dp
->di_ctime
;
784 obi
.di_nlink
= dp
->di_nlink
;
785 obi
.di_blocks
= dp
->di_blocks
;
786 obi
.di_flags
= dp
->di_flags
;
787 obi
.di_gen
= dp
->di_gen
;
788 memmove(&obi
.di_db
, &dp
->di_db
, (NDADDR
+ NIADDR
) * sizeof(daddr_t
));
789 if (dp
->di_file_acl
|| dp
->di_dir_acl
)
790 warn("ACLs in inode #%ld won't be dumped", ino
);
791 memmove(&spcl
.c_dinode
, &obi
, sizeof(obi
));
792 #else /* __linux__ */
794 #endif /* __linux__ */
795 spcl
.c_type
= TS_INODE
;
797 switch (dp
->di_mode
& S_IFMT
) {
808 msg("Warning: size of directory inode #%d is <= 0 (%d)!\n",
813 msg("Warning: dumpdirino called with file type 0%o (inode #%d)\n",
814 dp
->di_mode
& IFMT
, ino
);
817 for (size
= 0; size
< dir_size
; size
+= TP_BSIZE
) {
821 memmove(buf
, cdc
.buf
+ size
, TP_BSIZE
);
823 spcl
.c_type
= TS_ADDR
;
828 #endif /* __linux__ */
832 * Read indirect blocks, and pass the data blocks to be dumped.
835 dmpindir(ino_t ino
, daddr_t blk
, int ind_level
, fsizeT
*size
)
842 daddr_t idblk
[MAXNINDIR
];
845 bread(fsbtodb(sblock
, blk
), (char *)idblk
, (int) sblock
->fs_bsize
);
848 * My RedHat 4.0 system doesn't have these flags; I haven't
849 * upgraded e2fsprogs yet
851 #if defined(EXT2_FLAG_SWAP_BYTES)
852 if ((fs
->flags
& EXT2_FLAG_SWAP_BYTES
) ||
853 (fs
->flags
& EXT2_FLAG_SWAP_BYTES_READ
)) {
855 max
= sblock
->fs_bsize
>> 2;
856 swapme
= (blk_t
*) idblk
;
857 for (i
= 0; i
< max
; i
++, swapme
++)
858 *swapme
= swab32(*swapme
);
859 #if defined(EXT2_FLAG_SWAP_BYTES)
864 memset(idblk
, 0, (int)sblock
->fs_bsize
);
865 if (ind_level
<= 0) {
866 if (*size
< NINDIR(sblock
) * sblock
->fs_bsize
)
867 cnt
= howmany(*size
, sblock
->fs_fsize
);
870 cnt
= NINDIR(sblock
) * EXT2_FRAGS_PER_BLOCK(fs
->super
);
872 cnt
= NINDIR(sblock
) * sblock
->fs_frag
;
874 *size
-= NINDIR(sblock
) * sblock
->fs_bsize
;
875 blksout(&idblk
[0], cnt
, ino
);
879 for (i
= 0; i
< NINDIR(sblock
); i
++) {
880 dmpindir(ino
, idblk
[i
], ind_level
, size
);
888 * Collect up the data into tape record sized buffers and output them.
891 blksout(daddr_t
*blkp
, int frags
, ino_t ino
)
893 register daddr_t
*bp
;
894 int i
, j
, count
, blks
, tbperdb
;
896 blks
= howmany(frags
* sblock
->fs_fsize
, TP_BSIZE
);
897 tbperdb
= sblock
->fs_bsize
>> tp_bshift
;
898 for (i
= 0; i
< blks
; i
+= TP_NINDIR
) {
899 if (i
+ TP_NINDIR
> blks
)
902 count
= i
+ TP_NINDIR
;
903 for (j
= i
; j
< count
; j
++)
904 if (blkp
[j
/ tbperdb
] != 0)
905 spcl
.c_addr
[j
- i
] = 1;
907 spcl
.c_addr
[j
- i
] = 0;
908 spcl
.c_count
= count
- i
;
910 bp
= &blkp
[i
/ tbperdb
];
911 for (j
= i
; j
< count
; j
+= tbperdb
, bp
++) {
913 if (j
+ tbperdb
<= count
)
914 dumpblock(*bp
, (int)sblock
->fs_bsize
);
916 dumpblock(*bp
, (count
- j
) * TP_BSIZE
);
919 spcl
.c_type
= TS_ADDR
;
924 * Dump a map to the tape.
927 dumpmap(char *map
, int type
, ino_t ino
)
933 spcl
.c_count
= howmany(mapsize
* sizeof(char), TP_BSIZE
);
935 for (i
= 0, cp
= map
; i
< spcl
.c_count
; i
++, cp
+= TP_BSIZE
)
940 * Write a header record to the dump tape.
943 writeheader(ino_t ino
)
946 register __s32 sum
, cnt
, *lp
;
948 register int32_t sum
, cnt
, *lp
;
951 spcl
.c_inumber
= ino
;
952 spcl
.c_magic
= NFS_MAGIC
;
957 lp
= (int32_t *)&spcl
;
961 cnt
= sizeof(union u_spcl
) / (4 * sizeof(__s32
));
963 cnt
= sizeof(union u_spcl
) / (4 * sizeof(int32_t));
971 spcl
.c_checksum
= CHECKSUM
- sum
;
972 writerec((char *)&spcl
, 1);
979 static struct dinode dinode
;
982 ext2fs_read_inode(fs
, inum
, (struct ext2_inode
*) &dinode
);
985 #else /* __linux__ */
989 static daddr_t minino
, maxino
;
990 static struct dinode inoblock
[MAXINOPB
];
993 if (inum
>= minino
&& inum
< maxino
)
994 return (&inoblock
[inum
- minino
]);
995 bread(fsbtodb(sblock
, ino_to_fsba(sblock
, inum
)), (char *)inoblock
,
996 (int)sblock
->fs_bsize
);
997 minino
= inum
- (inum
% INOPB(sblock
));
998 maxino
= minino
+ INOPB(sblock
);
999 return (&inoblock
[inum
- minino
]);
1001 #endif /* __linux__ */
1004 * Read a chunk of data from the disk.
1005 * Try to recover from hard errors by reading in sector sized pieces.
1006 * Error recovery is attempted at most BREADEMAX times before seeking
1007 * consent from the operator to continue.
1009 int breaderrors
= 0;
1010 #define BREADEMAX 32
1013 bread(daddr_t blkno
, char *buf
, int size
)
1020 if (llseek(diskfd
, ((ext2_loff_t
)blkno
<< dev_bshift
), 0) !=
1021 ((ext2_loff_t
)blkno
<< dev_bshift
))
1023 if (lseek(diskfd
, ((off_t
)blkno
<< dev_bshift
), 0) !=
1024 ((off_t
)blkno
<< dev_bshift
))
1026 msg("bread: lseek fails\n");
1027 if ((cnt
= read(diskfd
, buf
, size
)) == size
)
1029 if (blkno
+ (size
/ dev_bsize
) > fsbtodb(sblock
, sblock
->fs_size
)) {
1031 * Trying to read the final fragment.
1033 * NB - dump only works in TP_BSIZE blocks, hence
1034 * rounds `dev_bsize' fragments up to TP_BSIZE pieces.
1035 * It should be smarter about not actually trying to
1036 * read more than it can get, but for the time being
1037 * we punt and scale back the read only when it gets
1038 * us into trouble. (mkm 9/25/83)
1044 msg("read error from %s: %s: [block %d]: count=%d\n",
1045 disk
, strerror(errno
), blkno
, size
);
1047 msg("short read error from %s: [block %d]: count=%d, got=%d\n",
1048 disk
, blkno
, size
, cnt
);
1049 if (++breaderrors
> BREADEMAX
) {
1050 msg("More than %d block read errors from %d\n",
1052 broadcast("DUMP IS AILING!\n");
1053 msg("This is an unrecoverable error.\n");
1054 if (!query("Do you want to attempt to continue?")){
1061 * Zero buffer, then try to read each sector of buffer separately.
1063 memset(buf
, 0, size
);
1064 for (i
= 0; i
< size
; i
+= dev_bsize
, buf
+= dev_bsize
, blkno
++) {
1066 if (llseek(diskfd
, ((ext2_loff_t
)blkno
<< dev_bshift
), 0) !=
1067 ((ext2_loff_t
)blkno
<< dev_bshift
))
1069 if (lseek(diskfd
, ((off_t
)blkno
<< dev_bshift
), 0) !=
1070 ((off_t
)blkno
<< dev_bshift
))
1072 msg("bread: lseek2 fails!\n");
1073 if ((cnt
= read(diskfd
, buf
, (int)dev_bsize
)) == dev_bsize
)
1076 msg("read error from %s: %s: [sector %d]: count=%d\n",
1077 disk
, strerror(errno
), blkno
, dev_bsize
);
1080 msg("short read error from %s: [sector %d]: count=%d, got=%d\n",
1081 disk
, blkno
, dev_bsize
, cnt
);