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 1.8 1999/11/17 22:46:43 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
));
103 * This is an estimation of the number of TP_BSIZE blocks in the file.
104 * It estimates the number of blocks in files with holes by assuming
105 * that all of the blocks accounted for by di_blocks are data blocks
106 * (when some of the blocks are usually used for indirect pointers);
107 * hence the estimate may be high.
110 blockest(struct dinode
*dp
)
112 long blkest
, sizeest
;
115 * dp->di_size is the size of the file in bytes.
116 * dp->di_blocks stores the number of sectors actually in the file.
117 * If there are more sectors than the size would indicate, this just
118 * means that there are indirect blocks in the file or unused
119 * sectors in the last file block; we can safely ignore these
120 * (blkest = sizeest below).
121 * If the file is bigger than the number of sectors would indicate,
122 * then the file has holes in it. In this case we must use the
123 * block count to estimate the number of data blocks used, but
124 * we use the actual size for estimating the number of indirect
125 * dump blocks (sizeest vs. blkest in the indirect block
128 blkest
= howmany(dbtob(dp
->di_blocks
), TP_BSIZE
);
129 sizeest
= howmany(dp
->di_size
, TP_BSIZE
);
130 if (blkest
> sizeest
)
133 if (dp
->di_size
> fs
->blocksize
* NDADDR
) {
134 /* calculate the number of indirect blocks on the dump tape */
136 howmany(sizeest
- NDADDR
* fs
->blocksize
/ TP_BSIZE
,
140 if (dp
->di_size
> sblock
->fs_bsize
* NDADDR
) {
141 /* calculate the number of indirect blocks on the dump tape */
143 howmany(sizeest
- NDADDR
* sblock
->fs_bsize
/ TP_BSIZE
,
150 /* Auxiliary macro to pick up files changed since previous dump. */
151 #define CHANGEDSINCE(dp, t) \
152 ((dp)->di_mtime >= (t) || (dp)->di_ctime >= (t))
154 /* The WANTTODUMP macro decides whether a file should be dumped. */
156 #define WANTTODUMP(dp) \
157 (CHANGEDSINCE(dp, spcl.c_ddate) && \
158 (nonodump || ((dp)->di_flags & UF_NODUMP) != UF_NODUMP))
160 #define WANTTODUMP(dp) CHANGEDSINCE(dp, spcl.c_ddate)
166 * Walk the inode list for a filesystem to find all allocated inodes
167 * that have been modified since the previous dump time. Also, find all
168 * the directories in the filesystem.
171 mapfiles(ino_t maxino
, long *tapesize
)
175 register struct dinode
*dp
;
176 int anydirskipped
= 0;
178 for (ino
= ROOTINO
; ino
< maxino
; ino
++) {
180 if ((mode
= (dp
->di_mode
& IFMT
)) == 0)
183 if (dp
->di_nlink
== 0 || dp
->di_dtime
!= 0)
186 SETINO(ino
, usedinomap
);
188 SETINO(ino
, dumpdirmap
);
189 if (WANTTODUMP(dp
)) {
190 SETINO(ino
, dumpinomap
);
191 if (mode
!= IFREG
&& mode
!= IFDIR
&& mode
!= IFLNK
)
194 *tapesize
+= blockest(dp
);
201 * Restore gets very upset if the root is not dumped,
202 * so ensure that it always is dumped.
204 SETINO(ROOTINO
, dumpinomap
);
205 return (anydirskipped
);
209 struct mapfile_context
{
215 mapfilesindir(struct ext2_dir_entry
*dirent
, int offset
, int blocksize
, char *buf
, void *private)
217 register struct dinode
*dp
;
221 struct mapfile_context
*mfc
;
224 mfc
= (struct mapfile_context
*)private;
226 if ((mode
= (dp
->di_mode
& IFMT
)) != 0 &&
227 dp
->di_nlink
!= 0 && dp
->di_dtime
== 0) {
228 SETINO(ino
, usedinomap
);
230 SETINO(ino
, dumpdirmap
);
231 if (WANTTODUMP(dp
)) {
232 SETINO(ino
, dumpinomap
);
233 if (mode
!= IFREG
&& mode
!= IFDIR
&& mode
!= IFLNK
)
236 *mfc
->tapesize
+= blockest(dp
);
239 mfc
->anydirskipped
= 1;
240 if ((dirent
->name
[0] != '.' || dirent
->name_len
!= 1) &&
241 (dirent
->name
[0] != '.' || dirent
->name
[1] != '.' ||
242 dirent
->name_len
!= 2)) {
243 retval
= ext2fs_dir_iterate(fs
, ino
, 0, NULL
,
244 mapfilesindir
, private);
256 * Walk the inode list for a filesystem to find all allocated inodes
257 * that have been modified since the previous dump time. Also, find all
258 * the directories in the filesystem.
261 mapfilesfromdir(ino_t maxino
, long *tapesize
, char *directory
)
264 struct mapfile_context mfc
;
266 char dir_name
[MAXPATHLEN
];
270 * Mark every directory in the path as being dumped
272 for (i
= 0; i
< strlen (directory
); i
++) {
273 if (directory
[i
] == '/') {
274 strncpy (dir_name
, directory
, i
);
276 retval
= ext2fs_namei(fs
, ROOTINO
, ROOTINO
, dir_name
,
279 com_err(disk
, retval
, "while translating %s",
283 /* SETINO(dir_ino, dumpinomap); */
284 SETINO(dir_ino
, dumpdirmap
);
288 * Mark the final directory
290 retval
= ext2fs_namei(fs
, ROOTINO
, ROOTINO
, directory
, &dir_ino
);
292 com_err(disk
, retval
, "while translating %s", directory
);
295 /* SETINO(dir_ino, dumpinomap); */
296 SETINO(dir_ino
, dumpdirmap
);
298 mfc
.tapesize
= tapesize
;
299 mfc
.anydirskipped
= 0;
300 retval
= ext2fs_dir_iterate(fs
, dir_ino
, 0, NULL
, mapfilesindir
,
304 com_err(disk
, retval
, "while mapping files in %s", directory
);
308 * Restore gets very upset if the root is not dumped,
309 * so ensure that it always is dumped.
311 /* SETINO(ROOTINO, dumpinomap); */
312 SETINO(ROOTINO
, dumpdirmap
);
313 return (mfc
.anydirskipped
);
320 * Scan each directory on the filesystem to see if it has any modified
321 * files in it. If it does, and has not already been added to the dump
322 * list (because it was itself modified), then add it. If a directory
323 * has not been modified itself, contains no modified files and has no
324 * subdirectories, then it can be deleted from the dump list and from
325 * the list of directories. By deleting it from the list of directories,
326 * its parent may now qualify for the same treatment on this or a later
327 * pass using this algorithm.
330 mapdirs(ino_t maxino
, long *tapesize
)
332 register struct dinode
*dp
;
342 isdir
= 0; /* XXX just to get gcc to shut up */
343 for (map
= dumpdirmap
, ino
= 1; ino
< maxino
; ino
++) {
344 if (((ino
- 1) % NBBY
) == 0) /* map is offset by 1 */
348 if ((isdir
& 1) == 0 || TSTINO(ino
, dumpinomap
))
353 ext2fs_dir_iterate(fs
, ino
, 0, NULL
, searchdir
, (void *) &ret
);
354 #else /* __linux__ */
355 filesize
= dp
->di_size
;
356 for (ret
= 0, i
= 0; filesize
> 0 && i
< NDADDR
; i
++) {
357 if (dp
->di_db
[i
] != 0)
358 ret
|= searchdir(ino
, dp
->di_db
[i
],
359 (long)dblksize(sblock
, dp
, i
),
361 if (ret
& HASDUMPEDFILE
)
364 filesize
-= sblock
->fs_bsize
;
366 for (i
= 0; filesize
> 0 && i
< NIADDR
; i
++) {
367 if (dp
->di_ib
[i
] == 0)
369 ret
|= dirindir(ino
, dp
->di_ib
[i
], i
, &filesize
);
371 #endif /* __linux__ */
372 if (ret
& HASDUMPEDFILE
) {
373 SETINO(ino
, dumpinomap
);
374 *tapesize
+= blockest(dp
);
378 if ((ret
& HASSUBDIRS
) == 0) {
379 if (!TSTINO(ino
, dumpinomap
)) {
380 CLRINO(ino
, dumpdirmap
);
390 * Read indirect blocks, and pass the data blocks to be searched
391 * as directories. Quit as soon as any entry is found that will
392 * require the directory to be dumped.
395 dirindir(ino_t ino
, daddr_t blkno
, int ind_level
, long *filesize
)
399 daddr_t idblk
[MAXNINDIR
];
401 bread(fsbtodb(sblock
, blkno
), (char *)idblk
, (int)sblock
->fs_bsize
);
402 if (ind_level
<= 0) {
403 for (i
= 0; *filesize
> 0 && i
< NINDIR(sblock
); i
++) {
406 ret
|= searchdir(ino
, blkno
, sblock
->fs_bsize
,
408 if (ret
& HASDUMPEDFILE
)
411 *filesize
-= sblock
->fs_bsize
;
416 for (i
= 0; *filesize
> 0 && i
< NINDIR(sblock
); i
++) {
419 ret
|= dirindir(ino
, blkno
, ind_level
, filesize
);
423 #endif /* !__linux__ */
426 * Scan a disk block containing directory information looking to see if
427 * any of the entries are on the dump list and to see if the directory
428 * contains any subdirectories.
432 searchdir(struct ext2_dir_entry
*dp
, int offset
, int blocksize
, char *buf
, void *private)
434 int *ret
= (int *) private;
438 if (dp
->name
[0] == '.') {
439 if (dp
->name_len
== 1)
441 if (dp
->name
[1] == '.' && dp
->name_len
== 2)
444 if (TSTINO(dp
->inode
, dumpinomap
)) {
445 *ret
|= HASDUMPEDFILE
;
446 if (*ret
& HASSUBDIRS
)
449 if (TSTINO(dp
->inode
, dumpdirmap
)) {
451 if (*ret
& HASDUMPEDFILE
)
457 #else /* __linux__ */
460 searchdir(ino_t ino
, daddr_t blkno
, long size
, long filesize
)
462 register struct direct
*dp
;
463 register long loc
, ret
= 0;
466 bread(fsbtodb(sblock
, blkno
), dblk
, (int)size
);
469 for (loc
= 0; loc
< size
; ) {
470 dp
= (struct direct
*)(dblk
+ loc
);
471 if (dp
->d_reclen
== 0) {
472 msg("corrupted directory, inumber %d\n", ino
);
478 if (dp
->d_name
[0] == '.') {
479 if (dp
->d_name
[1] == '\0')
481 if (dp
->d_name
[1] == '.' && dp
->d_name
[2] == '\0')
484 if (TSTINO(dp
->d_ino
, dumpinomap
)) {
485 ret
|= HASDUMPEDFILE
;
486 if (ret
& HASSUBDIRS
)
489 if (TSTINO(dp
->d_ino
, dumpdirmap
)) {
491 if (ret
& HASDUMPEDFILE
)
497 #endif /* __linux__ */
501 struct block_context
{
510 * Dump a block to the tape
513 dumponeblock(ext2_filsys fs
, blk_t
*blocknr
, int blockcnt
, void *private)
515 struct block_context
*p
;
518 if (blockcnt
< NDADDR
)
520 p
= (struct block_context
*)private;
521 for (i
= p
->next_block
; i
< blockcnt
; i
++) {
522 p
->buf
[p
->cnt
++] = 0;
523 if (p
->cnt
== p
->max
) {
524 blksout (p
->buf
, p
->cnt
, p
->ino
);
528 p
->buf
[p
->cnt
++] = *blocknr
;
529 if (p
->cnt
== p
->max
) {
530 blksout (p
->buf
, p
->cnt
, p
->ino
);
533 p
->next_block
= blockcnt
+ 1;
539 * Dump passes 3 and 4.
541 * Dump the contents of an inode to tape.
544 dumpino(struct dinode
*dp
, ino_t ino
)
549 struct old_bsd_inode obi
;
551 struct block_context bc
;
558 dumpmap(dumpinomap
, TS_BITS
, ino
);
560 CLRINO(ino
, dumpinomap
);
562 memset(&obi
, 0, sizeof(obi
));
563 obi
.di_mode
= dp
->di_mode
;
564 obi
.di_uid
= dp
->di_uid
;
565 obi
.di_gid
= dp
->di_gid
;
566 obi
.di_qsize
.v
= (u_quad_t
)dp
->di_size
;
567 obi
.di_atime
= dp
->di_atime
;
568 obi
.di_mtime
= dp
->di_mtime
;
569 obi
.di_ctime
= dp
->di_ctime
;
570 obi
.di_nlink
= dp
->di_nlink
;
571 obi
.di_blocks
= dp
->di_blocks
;
572 obi
.di_flags
= dp
->di_flags
;
573 obi
.di_gen
= dp
->di_gen
;
574 memmove(&obi
.di_db
, &dp
->di_db
, (NDADDR
+ NIADDR
) * sizeof(daddr_t
));
575 if (dp
->di_file_acl
|| dp
->di_dir_acl
)
576 warn("ACLs in inode #%ld won't be dumped", ino
);
577 memmove(&spcl
.c_dinode
, &obi
, sizeof(obi
));
578 #else /* __linux__ */
580 #endif /* __linux__ */
581 spcl
.c_type
= TS_INODE
;
583 switch (dp
->di_mode
& S_IFMT
) {
593 msg("Warning: dumpino called on a directory (ino %d)\n", ino
);
599 * Check for short symbolic link.
602 if (dp
->di_size
> 0 &&
603 dp
->di_size
< EXT2_N_BLOCKS
* sizeof (daddr_t
)) {
607 memmove(buf
, dp
->di_db
, (u_long
)dp
->di_size
);
608 buf
[dp
->di_size
] = '\0';
612 #endif /* __linux__ */
614 if (dp
->di_size
> 0 &&
615 dp
->di_size
< sblock
->fs_maxsymlinklen
) {
619 memmove(buf
, dp
->di_shortlink
, (u_long
)dp
->di_size
);
620 buf
[dp
->di_size
] = '\0';
643 msg("Warning: undefined file type 0%o\n", dp
->di_mode
& IFMT
);
646 if (dp
->di_size
> NDADDR
* sblock
->fs_bsize
)
648 cnt
= NDADDR
* EXT2_FRAGS_PER_BLOCK(fs
->super
);
650 cnt
= NDADDR
* sblock
->fs_frag
;
653 cnt
= howmany(dp
->di_size
, sblock
->fs_fsize
);
654 blksout(&dp
->di_db
[0], cnt
, ino
);
655 if ((size
= dp
->di_size
- NDADDR
* sblock
->fs_bsize
) <= 0)
658 bc
.max
= NINDIR(sblock
) * EXT2_FRAGS_PER_BLOCK(fs
->super
);
659 bc
.buf
= (int *)malloc (bc
.max
* sizeof (int));
662 bc
.next_block
= NDADDR
;
664 ext2fs_block_iterate (fs
, ino
, 0, NULL
, dumponeblock
, (void *)&bc
);
666 blksout (bc
.buf
, bc
.cnt
, bc
.ino
);
669 for (ind_level
= 0; ind_level
< NIADDR
; ind_level
++) {
670 dmpindir(ino
, dp
->di_ib
[ind_level
], ind_level
, &size
);
679 struct convert_dir_context
{
687 * This function converts an ext2fs directory entry to the BSD format.
689 * Basically, it adds a null-character at the end of the name, recomputes the
690 * size of the entry, and creates it in a temporary buffer
693 convert_dir(struct ext2_dir_entry
*dirent
, int offset
, int blocksize
, char *buf
, void *private)
695 struct convert_dir_context
*p
;
699 p
= (struct convert_dir_context
*)private;
701 reclen
= EXT2_DIR_REC_LEN((dirent
->name_len
& 0xFF) + 1);
702 if (((p
->offset
+ reclen
- 1) / p
->bs
) != (p
->offset
/ p
->bs
)) {
703 dp
= (struct direct
*)(p
->buf
+ p
->prev_offset
);
704 dp
->d_reclen
+= p
->bs
- (p
->offset
% p
->bs
);
705 p
->offset
+= p
->bs
- (p
->offset
% p
->bs
);
708 dp
= (struct direct
*)(p
->buf
+ p
->offset
);
709 dp
->d_ino
= dirent
->inode
;
710 dp
->d_reclen
= reclen
;
712 dp
->d_namlen
= dirent
->name_len
& 0xFF;
713 strncpy(dp
->d_name
, dirent
->name
, dp
->d_namlen
);
714 dp
->d_name
[dp
->d_namlen
] = '\0';
715 p
->prev_offset
= p
->offset
;
724 * Dumps a directory to tape after converting it to the BSD format
727 dumpdirino(struct dinode
*dp
, ino_t ino
)
731 struct old_bsd_inode obi
;
732 struct convert_dir_context cdc
;
734 struct ext2_dir_entry
*de
;
739 dumpmap(dumpinomap
, TS_BITS
, ino
);
741 CLRINO(ino
, dumpinomap
);
744 * Convert the directory to the BSD format
746 /* Allocate a buffer for the conversion (twice the size of the
747 ext2fs directory to avoid problems ;-) */
748 cdc
.buf
= (char *)malloc(dp
->di_size
* 2 * sizeof(char));
750 err(1, "Cannot allocate buffer to convert directory #%lu\n",
754 cdc
.bs
= MIN(DIRBLKSIZ
, TP_BSIZE
);
755 /* Do the conversion */
756 retval
= ext2fs_dir_iterate(fs
, ino
, 0, NULL
, convert_dir
, (void *)&cdc
);
758 com_err(disk
, retval
, "while converting directory #%ld\n", ino
);
761 /* Fix the last entry */
762 if ((cdc
.offset
% cdc
.bs
) != 0) {
763 de
= (struct ext2_dir_entry
*)(cdc
.buf
+ cdc
.prev_offset
);
764 de
->rec_len
+= cdc
.bs
- (cdc
.offset
% cdc
.bs
);
765 cdc
.offset
+= cdc
.bs
- (cdc
.offset
% cdc
.bs
);
768 dir_size
= cdc
.offset
;
771 memset(&obi
, 0, sizeof(obi
));
772 obi
.di_mode
= dp
->di_mode
;
773 obi
.di_uid
= dp
->di_uid
;
774 obi
.di_gid
= dp
->di_gid
;
775 obi
.di_qsize
.v
= dir_size
; /* (u_quad_t)dp->di_size; */
776 obi
.di_atime
= dp
->di_atime
;
777 obi
.di_mtime
= dp
->di_mtime
;
778 obi
.di_ctime
= dp
->di_ctime
;
779 obi
.di_nlink
= dp
->di_nlink
;
780 obi
.di_blocks
= dp
->di_blocks
;
781 obi
.di_flags
= dp
->di_flags
;
782 obi
.di_gen
= dp
->di_gen
;
783 memmove(&obi
.di_db
, &dp
->di_db
, (NDADDR
+ NIADDR
) * sizeof(daddr_t
));
784 if (dp
->di_file_acl
|| dp
->di_dir_acl
)
785 warn("ACLs in inode #%ld won't be dumped", ino
);
786 memmove(&spcl
.c_dinode
, &obi
, sizeof(obi
));
787 #else /* __linux__ */
789 #endif /* __linux__ */
790 spcl
.c_type
= TS_INODE
;
792 switch (dp
->di_mode
& S_IFMT
) {
803 msg("Warning: size of directory inode #%d is <= 0 (%d)!\n",
808 msg("Warning: dumpdirino called with file type 0%o (inode #%d)\n",
809 dp
->di_mode
& IFMT
, ino
);
812 for (size
= 0; size
< dir_size
; size
+= TP_BSIZE
) {
816 memmove(buf
, cdc
.buf
+ size
, TP_BSIZE
);
818 spcl
.c_type
= TS_ADDR
;
823 #endif /* __linux__ */
827 * Read indirect blocks, and pass the data blocks to be dumped.
830 dmpindir(ino_t ino
, daddr_t blk
, int ind_level
, fsizeT
*size
)
837 daddr_t idblk
[MAXNINDIR
];
840 bread(fsbtodb(sblock
, blk
), (char *)idblk
, (int) sblock
->fs_bsize
);
843 * My RedHat 4.0 system doesn't have these flags; I haven't
844 * upgraded e2fsprogs yet
846 #if defined(EXT2_FLAG_SWAP_BYTES)
847 if ((fs
->flags
& EXT2_FLAG_SWAP_BYTES
) ||
848 (fs
->flags
& EXT2_FLAG_SWAP_BYTES_READ
)) {
850 max
= sblock
->fs_bsize
>> 2;
851 swapme
= (blk_t
*) idblk
;
852 for (i
= 0; i
< max
; i
++, swapme
++)
853 *swapme
= swab32(*swapme
);
854 #if defined(EXT2_FLAG_SWAP_BYTES)
859 memset(idblk
, 0, (int)sblock
->fs_bsize
);
860 if (ind_level
<= 0) {
861 if (*size
< NINDIR(sblock
) * sblock
->fs_bsize
)
862 cnt
= howmany(*size
, sblock
->fs_fsize
);
865 cnt
= NINDIR(sblock
) * EXT2_FRAGS_PER_BLOCK(fs
->super
);
867 cnt
= NINDIR(sblock
) * sblock
->fs_frag
;
869 *size
-= NINDIR(sblock
) * sblock
->fs_bsize
;
870 blksout(&idblk
[0], cnt
, ino
);
874 for (i
= 0; i
< NINDIR(sblock
); i
++) {
875 dmpindir(ino
, idblk
[i
], ind_level
, size
);
883 * Collect up the data into tape record sized buffers and output them.
886 blksout(daddr_t
*blkp
, int frags
, ino_t ino
)
888 register daddr_t
*bp
;
889 int i
, j
, count
, blks
, tbperdb
;
891 blks
= howmany(frags
* sblock
->fs_fsize
, TP_BSIZE
);
892 tbperdb
= sblock
->fs_bsize
>> tp_bshift
;
893 for (i
= 0; i
< blks
; i
+= TP_NINDIR
) {
894 if (i
+ TP_NINDIR
> blks
)
897 count
= i
+ TP_NINDIR
;
898 for (j
= i
; j
< count
; j
++)
899 if (blkp
[j
/ tbperdb
] != 0)
900 spcl
.c_addr
[j
- i
] = 1;
902 spcl
.c_addr
[j
- i
] = 0;
903 spcl
.c_count
= count
- i
;
905 bp
= &blkp
[i
/ tbperdb
];
906 for (j
= i
; j
< count
; j
+= tbperdb
, bp
++) {
908 if (j
+ tbperdb
<= count
)
909 dumpblock(*bp
, (int)sblock
->fs_bsize
);
911 dumpblock(*bp
, (count
- j
) * TP_BSIZE
);
914 spcl
.c_type
= TS_ADDR
;
919 * Dump a map to the tape.
922 dumpmap(char *map
, int type
, ino_t ino
)
928 spcl
.c_count
= howmany(mapsize
* sizeof(char), TP_BSIZE
);
930 for (i
= 0, cp
= map
; i
< spcl
.c_count
; i
++, cp
+= TP_BSIZE
)
935 * Write a header record to the dump tape.
938 writeheader(ino_t ino
)
941 register __s32 sum
, cnt
, *lp
;
943 register int32_t sum
, cnt
, *lp
;
946 spcl
.c_inumber
= ino
;
947 spcl
.c_magic
= NFS_MAGIC
;
952 lp
= (int32_t *)&spcl
;
956 cnt
= sizeof(union u_spcl
) / (4 * sizeof(__s32
));
958 cnt
= sizeof(union u_spcl
) / (4 * sizeof(int32_t));
966 spcl
.c_checksum
= CHECKSUM
- sum
;
967 writerec((char *)&spcl
, 1);
974 static struct dinode dinode
;
977 ext2fs_read_inode(fs
, inum
, (struct ext2_inode
*) &dinode
);
980 #else /* __linux__ */
984 static daddr_t minino
, maxino
;
985 static struct dinode inoblock
[MAXINOPB
];
988 if (inum
>= minino
&& inum
< maxino
)
989 return (&inoblock
[inum
- minino
]);
990 bread(fsbtodb(sblock
, ino_to_fsba(sblock
, inum
)), (char *)inoblock
,
991 (int)sblock
->fs_bsize
);
992 minino
= inum
- (inum
% INOPB(sblock
));
993 maxino
= minino
+ INOPB(sblock
);
994 return (&inoblock
[inum
- minino
]);
996 #endif /* __linux__ */
999 * Read a chunk of data from the disk.
1000 * Try to recover from hard errors by reading in sector sized pieces.
1001 * Error recovery is attempted at most BREADEMAX times before seeking
1002 * consent from the operator to continue.
1004 int breaderrors
= 0;
1005 #define BREADEMAX 32
1008 bread(daddr_t blkno
, char *buf
, int size
)
1015 if (ext2fs_llseek(diskfd
, (((ext2_loff_t
)blkno
) << dev_bshift
), 0) !=
1016 (((ext2_loff_t
)blkno
) << dev_bshift
))
1018 if (lseek(diskfd
, ((off_t
)blkno
<< dev_bshift
), 0) !=
1019 ((off_t
)blkno
<< dev_bshift
))
1021 msg("bread: lseek fails\n");
1022 if ((cnt
= read(diskfd
, buf
, size
)) == size
)
1024 if (blkno
+ (size
/ dev_bsize
) > fsbtodb(sblock
, sblock
->fs_size
)) {
1026 * Trying to read the final fragment.
1028 * NB - dump only works in TP_BSIZE blocks, hence
1029 * rounds `dev_bsize' fragments up to TP_BSIZE pieces.
1030 * It should be smarter about not actually trying to
1031 * read more than it can get, but for the time being
1032 * we punt and scale back the read only when it gets
1033 * us into trouble. (mkm 9/25/83)
1039 msg("read error from %s: %s: [block %d]: count=%d\n",
1040 disk
, strerror(errno
), blkno
, size
);
1042 msg("short read error from %s: [block %d]: count=%d, got=%d\n",
1043 disk
, blkno
, size
, cnt
);
1044 if (++breaderrors
> BREADEMAX
) {
1045 msg("More than %d block read errors from %d\n",
1047 broadcast("DUMP IS AILING!\n");
1048 msg("This is an unrecoverable error.\n");
1049 if (!query("Do you want to attempt to continue?")){
1056 * Zero buffer, then try to read each sector of buffer separately.
1058 memset(buf
, 0, size
);
1059 for (i
= 0; i
< size
; i
+= dev_bsize
, buf
+= dev_bsize
, blkno
++) {
1061 if (ext2fs_llseek(diskfd
, (((ext2_loff_t
)blkno
) << dev_bshift
), 0) !=
1062 (((ext2_loff_t
)blkno
) << dev_bshift
))
1064 if (lseek(diskfd
, ((off_t
)blkno
<< dev_bshift
), 0) !=
1065 ((off_t
)blkno
<< dev_bshift
))
1067 msg("bread: lseek2 fails!\n");
1068 if ((cnt
= read(diskfd
, buf
, (int)dev_bsize
)) == dev_bsize
)
1071 msg("read error from %s: %s: [sector %d]: count=%d\n",
1072 disk
, strerror(errno
), blkno
, dev_bsize
);
1075 msg("short read error from %s: [sector %d]: count=%d, got=%d\n",
1076 disk
, blkno
, dev_bsize
, cnt
);