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 1.6 1999/10/13 09:57:20 stelian 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));
96 loff_t
llseek (int fd
, loff_t offset
, int origin
);
98 static int dirindir
__P((ino_t ino
, daddr_t blkno
, int level
, long *size
));
99 static void dmpindir
__P((ino_t ino
, daddr_t blk
, int level
, fsizeT
*size
));
100 static int searchdir
__P((ino_t ino
, daddr_t blkno
, long size
, long filesize
));
104 * This is an estimation of the number of TP_BSIZE blocks in the file.
105 * It estimates the number of blocks in files with holes by assuming
106 * that all of the blocks accounted for by di_blocks are data blocks
107 * (when some of the blocks are usually used for indirect pointers);
108 * hence the estimate may be high.
111 blockest(struct dinode
*dp
)
113 long blkest
, sizeest
;
116 * dp->di_size is the size of the file in bytes.
117 * dp->di_blocks stores the number of sectors actually in the file.
118 * If there are more sectors than the size would indicate, this just
119 * means that there are indirect blocks in the file or unused
120 * sectors in the last file block; we can safely ignore these
121 * (blkest = sizeest below).
122 * If the file is bigger than the number of sectors would indicate,
123 * then the file has holes in it. In this case we must use the
124 * block count to estimate the number of data blocks used, but
125 * we use the actual size for estimating the number of indirect
126 * dump blocks (sizeest vs. blkest in the indirect block
129 blkest
= howmany(dbtob(dp
->di_blocks
), TP_BSIZE
);
130 sizeest
= howmany(dp
->di_size
, TP_BSIZE
);
131 if (blkest
> sizeest
)
134 if (dp
->di_size
> fs
->blocksize
* NDADDR
) {
135 /* calculate the number of indirect blocks on the dump tape */
137 howmany(sizeest
- NDADDR
* fs
->blocksize
/ TP_BSIZE
,
141 if (dp
->di_size
> sblock
->fs_bsize
* NDADDR
) {
142 /* calculate the number of indirect blocks on the dump tape */
144 howmany(sizeest
- NDADDR
* sblock
->fs_bsize
/ TP_BSIZE
,
151 /* Auxiliary macro to pick up files changed since previous dump. */
152 #define CHANGEDSINCE(dp, t) \
153 ((dp)->di_mtime >= (t) || (dp)->di_ctime >= (t))
155 /* The WANTTODUMP macro decides whether a file should be dumped. */
157 #define WANTTODUMP(dp) \
158 (CHANGEDSINCE(dp, spcl.c_ddate) && \
159 (nonodump || ((dp)->di_flags & UF_NODUMP) != UF_NODUMP))
161 #define WANTTODUMP(dp) CHANGEDSINCE(dp, spcl.c_ddate)
167 * Walk the inode list for a filesystem to find all allocated inodes
168 * that have been modified since the previous dump time. Also, find all
169 * the directories in the filesystem.
172 mapfiles(ino_t maxino
, long *tapesize
)
176 register struct dinode
*dp
;
177 int anydirskipped
= 0;
179 for (ino
= ROOTINO
; ino
< maxino
; ino
++) {
181 if ((mode
= (dp
->di_mode
& IFMT
)) == 0)
184 if (dp
->di_nlink
== 0 || dp
->di_dtime
!= 0)
187 SETINO(ino
, usedinomap
);
189 SETINO(ino
, dumpdirmap
);
190 if (WANTTODUMP(dp
)) {
191 SETINO(ino
, dumpinomap
);
192 if (mode
!= IFREG
&& mode
!= IFDIR
&& mode
!= IFLNK
)
195 *tapesize
+= blockest(dp
);
202 * Restore gets very upset if the root is not dumped,
203 * so ensure that it always is dumped.
205 SETINO(ROOTINO
, dumpinomap
);
206 return (anydirskipped
);
210 struct mapfile_context
{
216 mapfilesindir(struct ext2_dir_entry
*dirent
, int offset
, int blocksize
, char *buf
, void *private)
218 register struct dinode
*dp
;
222 struct mapfile_context
*mfc
;
225 mfc
= (struct mapfile_context
*)private;
227 if ((mode
= (dp
->di_mode
& IFMT
)) != 0 &&
228 dp
->di_nlink
!= 0 && dp
->di_dtime
== 0) {
229 SETINO(ino
, usedinomap
);
231 SETINO(ino
, dumpdirmap
);
232 if (WANTTODUMP(dp
)) {
233 SETINO(ino
, dumpinomap
);
234 if (mode
!= IFREG
&& mode
!= IFDIR
&& mode
!= IFLNK
)
237 *mfc
->tapesize
+= blockest(dp
);
240 mfc
->anydirskipped
= 1;
241 if ((dirent
->name
[0] != '.' || dirent
->name_len
!= 1) &&
242 (dirent
->name
[0] != '.' || dirent
->name
[1] != '.' ||
243 dirent
->name_len
!= 2)) {
244 retval
= ext2fs_dir_iterate(fs
, ino
, 0, NULL
,
245 mapfilesindir
, private);
257 * Walk the inode list for a filesystem to find all allocated inodes
258 * that have been modified since the previous dump time. Also, find all
259 * the directories in the filesystem.
262 mapfilesfromdir(ino_t maxino
, long *tapesize
, char *directory
)
265 struct mapfile_context mfc
;
267 char dir_name
[MAXPATHLEN
];
271 * Mark every directory in the path as being dumped
273 for (i
= 0; i
< strlen (directory
); i
++) {
274 if (directory
[i
] == '/') {
275 strncpy (dir_name
, directory
, i
);
277 retval
= ext2fs_namei(fs
, ROOTINO
, ROOTINO
, dir_name
,
280 com_err(disk
, retval
, "while translating %s",
284 /* SETINO(dir_ino, dumpinomap); */
285 SETINO(dir_ino
, dumpdirmap
);
289 * Mark the final directory
291 retval
= ext2fs_namei(fs
, ROOTINO
, ROOTINO
, directory
, &dir_ino
);
293 com_err(disk
, retval
, "while translating %s", directory
);
296 /* SETINO(dir_ino, dumpinomap); */
297 SETINO(dir_ino
, dumpdirmap
);
299 mfc
.tapesize
= tapesize
;
300 mfc
.anydirskipped
= 0;
301 retval
= ext2fs_dir_iterate(fs
, dir_ino
, 0, NULL
, mapfilesindir
,
305 com_err(disk
, retval
, "while mapping files in %s", directory
);
309 * Restore gets very upset if the root is not dumped,
310 * so ensure that it always is dumped.
312 /* SETINO(ROOTINO, dumpinomap); */
313 SETINO(ROOTINO
, dumpdirmap
);
314 return (mfc
.anydirskipped
);
321 * Scan each directory on the filesystem to see if it has any modified
322 * files in it. If it does, and has not already been added to the dump
323 * list (because it was itself modified), then add it. If a directory
324 * has not been modified itself, contains no modified files and has no
325 * subdirectories, then it can be deleted from the dump list and from
326 * the list of directories. By deleting it from the list of directories,
327 * its parent may now qualify for the same treatment on this or a later
328 * pass using this algorithm.
331 mapdirs(ino_t maxino
, long *tapesize
)
333 register struct dinode
*dp
;
343 isdir
= 0; /* XXX just to get gcc to shut up */
344 for (map
= dumpdirmap
, ino
= 1; ino
< maxino
; ino
++) {
345 if (((ino
- 1) % NBBY
) == 0) /* map is offset by 1 */
349 if ((isdir
& 1) == 0 || TSTINO(ino
, dumpinomap
))
354 ext2fs_dir_iterate(fs
, ino
, 0, NULL
, searchdir
, (void *) &ret
);
355 #else /* __linux__ */
356 filesize
= dp
->di_size
;
357 for (ret
= 0, i
= 0; filesize
> 0 && i
< NDADDR
; i
++) {
358 if (dp
->di_db
[i
] != 0)
359 ret
|= searchdir(ino
, dp
->di_db
[i
],
360 (long)dblksize(sblock
, dp
, i
),
362 if (ret
& HASDUMPEDFILE
)
365 filesize
-= sblock
->fs_bsize
;
367 for (i
= 0; filesize
> 0 && i
< NIADDR
; i
++) {
368 if (dp
->di_ib
[i
] == 0)
370 ret
|= dirindir(ino
, dp
->di_ib
[i
], i
, &filesize
);
372 #endif /* __linux__ */
373 if (ret
& HASDUMPEDFILE
) {
374 SETINO(ino
, dumpinomap
);
375 *tapesize
+= blockest(dp
);
379 if ((ret
& HASSUBDIRS
) == 0) {
380 if (!TSTINO(ino
, dumpinomap
)) {
381 CLRINO(ino
, dumpdirmap
);
391 * Read indirect blocks, and pass the data blocks to be searched
392 * as directories. Quit as soon as any entry is found that will
393 * require the directory to be dumped.
396 dirindir(ino_t ino
, daddr_t blkno
, int ind_level
, long *filesize
)
400 daddr_t idblk
[MAXNINDIR
];
402 bread(fsbtodb(sblock
, blkno
), (char *)idblk
, (int)sblock
->fs_bsize
);
403 if (ind_level
<= 0) {
404 for (i
= 0; *filesize
> 0 && i
< NINDIR(sblock
); i
++) {
407 ret
|= searchdir(ino
, blkno
, sblock
->fs_bsize
,
409 if (ret
& HASDUMPEDFILE
)
412 *filesize
-= sblock
->fs_bsize
;
417 for (i
= 0; *filesize
> 0 && i
< NINDIR(sblock
); i
++) {
420 ret
|= dirindir(ino
, blkno
, ind_level
, filesize
);
424 #endif /* !__linux__ */
427 * Scan a disk block containing directory information looking to see if
428 * any of the entries are on the dump list and to see if the directory
429 * contains any subdirectories.
433 searchdir(struct ext2_dir_entry
*dp
, int offset
, int blocksize
, char *buf
, void *private)
435 int *ret
= (int *) private;
439 if (dp
->name
[0] == '.') {
440 if (dp
->name_len
== 1)
442 if (dp
->name
[1] == '.' && dp
->name_len
== 2)
445 if (TSTINO(dp
->inode
, dumpinomap
)) {
446 *ret
|= HASDUMPEDFILE
;
447 if (*ret
& HASSUBDIRS
)
450 if (TSTINO(dp
->inode
, dumpdirmap
)) {
452 if (*ret
& HASDUMPEDFILE
)
458 #else /* __linux__ */
461 searchdir(ino_t ino
, daddr_t blkno
, long size
, long filesize
)
463 register struct direct
*dp
;
464 register long loc
, ret
= 0;
467 bread(fsbtodb(sblock
, blkno
), dblk
, (int)size
);
470 for (loc
= 0; loc
< size
; ) {
471 dp
= (struct direct
*)(dblk
+ loc
);
472 if (dp
->d_reclen
== 0) {
473 msg("corrupted directory, inumber %d\n", ino
);
479 if (dp
->d_name
[0] == '.') {
480 if (dp
->d_name
[1] == '\0')
482 if (dp
->d_name
[1] == '.' && dp
->d_name
[2] == '\0')
485 if (TSTINO(dp
->d_ino
, dumpinomap
)) {
486 ret
|= HASDUMPEDFILE
;
487 if (ret
& HASSUBDIRS
)
490 if (TSTINO(dp
->d_ino
, dumpdirmap
)) {
492 if (ret
& HASDUMPEDFILE
)
498 #endif /* __linux__ */
502 struct block_context
{
511 * Dump a block to the tape
514 dumponeblock(ext2_filsys fs
, blk_t
*blocknr
, int blockcnt
, void *private)
516 struct block_context
*p
;
519 if (blockcnt
< NDADDR
)
521 p
= (struct block_context
*)private;
522 for (i
= p
->next_block
; i
< blockcnt
; i
++) {
523 p
->buf
[p
->cnt
++] = 0;
524 if (p
->cnt
== p
->max
) {
525 blksout (p
->buf
, p
->cnt
, p
->ino
);
529 p
->buf
[p
->cnt
++] = *blocknr
;
530 if (p
->cnt
== p
->max
) {
531 blksout (p
->buf
, p
->cnt
, p
->ino
);
534 p
->next_block
= blockcnt
+ 1;
540 * Dump passes 3 and 4.
542 * Dump the contents of an inode to tape.
545 dumpino(struct dinode
*dp
, ino_t ino
)
550 struct old_bsd_inode obi
;
552 struct block_context bc
;
559 dumpmap(dumpinomap
, TS_BITS
, ino
);
561 CLRINO(ino
, dumpinomap
);
563 memset(&obi
, 0, sizeof(obi
));
564 obi
.di_mode
= dp
->di_mode
;
565 obi
.di_uid
= dp
->di_uid
;
566 obi
.di_gid
= dp
->di_gid
;
567 obi
.di_qsize
.v
= (u_quad_t
)dp
->di_size
;
568 obi
.di_atime
= dp
->di_atime
;
569 obi
.di_mtime
= dp
->di_mtime
;
570 obi
.di_ctime
= dp
->di_ctime
;
571 obi
.di_nlink
= dp
->di_nlink
;
572 obi
.di_blocks
= dp
->di_blocks
;
573 obi
.di_flags
= dp
->di_flags
;
574 obi
.di_gen
= dp
->di_gen
;
575 memmove(&obi
.di_db
, &dp
->di_db
, (NDADDR
+ NIADDR
) * sizeof(daddr_t
));
576 if (dp
->di_file_acl
|| dp
->di_dir_acl
)
577 warn("ACLs in inode #%ld won't be dumped", ino
);
578 memmove(&spcl
.c_dinode
, &obi
, sizeof(obi
));
579 #else /* __linux__ */
581 #endif /* __linux__ */
582 spcl
.c_type
= TS_INODE
;
584 switch (dp
->di_mode
& S_IFMT
) {
594 msg("Warning: dumpino called on a directory (ino %d)\n", ino
);
600 * Check for short symbolic link.
603 if (dp
->di_size
> 0 &&
604 dp
->di_size
< EXT2_N_BLOCKS
* sizeof (daddr_t
)) {
608 memmove(buf
, dp
->di_db
, (u_long
)dp
->di_size
);
609 buf
[dp
->di_size
] = '\0';
613 #endif /* __linux__ */
615 if (dp
->di_size
> 0 &&
616 dp
->di_size
< sblock
->fs_maxsymlinklen
) {
620 memmove(buf
, dp
->di_shortlink
, (u_long
)dp
->di_size
);
621 buf
[dp
->di_size
] = '\0';
644 msg("Warning: undefined file type 0%o\n", dp
->di_mode
& IFMT
);
647 if (dp
->di_size
> NDADDR
* sblock
->fs_bsize
)
649 cnt
= NDADDR
* EXT2_FRAGS_PER_BLOCK(fs
->super
);
651 cnt
= NDADDR
* sblock
->fs_frag
;
654 cnt
= howmany(dp
->di_size
, sblock
->fs_fsize
);
655 blksout(&dp
->di_db
[0], cnt
, ino
);
656 if ((size
= dp
->di_size
- NDADDR
* sblock
->fs_bsize
) <= 0)
659 bc
.max
= NINDIR(sblock
) * EXT2_FRAGS_PER_BLOCK(fs
->super
);
660 bc
.buf
= (int *)malloc (bc
.max
* sizeof (int));
663 bc
.next_block
= NDADDR
;
665 ext2fs_block_iterate (fs
, ino
, 0, NULL
, dumponeblock
, (void *)&bc
);
667 blksout (bc
.buf
, bc
.cnt
, bc
.ino
);
670 for (ind_level
= 0; ind_level
< NIADDR
; ind_level
++) {
671 dmpindir(ino
, dp
->di_ib
[ind_level
], ind_level
, &size
);
680 struct convert_dir_context
{
688 * This function converts an ext2fs directory entry to the BSD format.
690 * Basically, it adds a null-character at the end of the name, recomputes the
691 * size of the entry, and creates it in a temporary buffer
694 convert_dir(struct ext2_dir_entry
*dirent
, int offset
, int blocksize
, char *buf
, void *private)
696 struct convert_dir_context
*p
;
700 p
= (struct convert_dir_context
*)private;
702 reclen
= EXT2_DIR_REC_LEN(dirent
->name_len
+ 1);
703 if (((p
->offset
+ reclen
- 1) / p
->bs
) != (p
->offset
/ p
->bs
)) {
704 dp
= (struct direct
*)(p
->buf
+ p
->prev_offset
);
705 dp
->d_reclen
+= p
->bs
- (p
->offset
% p
->bs
);
706 p
->offset
+= p
->bs
- (p
->offset
% p
->bs
);
709 dp
= (struct direct
*)(p
->buf
+ p
->offset
);
710 dp
->d_ino
= dirent
->inode
;
711 dp
->d_reclen
= reclen
;
713 dp
->d_namlen
= dirent
->name_len
;
714 strncpy(dp
->d_name
, dirent
->name
, dirent
->name_len
);
715 dp
->d_name
[dp
->d_namlen
] = '\0';
716 p
->prev_offset
= p
->offset
;
725 * Dumps a directory to tape after converting it to the BSD format
728 dumpdirino(struct dinode
*dp
, ino_t ino
)
732 struct old_bsd_inode obi
;
733 struct convert_dir_context cdc
;
735 struct ext2_dir_entry
*de
;
740 dumpmap(dumpinomap
, TS_BITS
, ino
);
742 CLRINO(ino
, dumpinomap
);
745 * Convert the directory to the BSD format
747 /* Allocate a buffer for the conversion (twice the size of the
748 ext2fs directory to avoid problems ;-) */
749 cdc
.buf
= (char *)malloc(dp
->di_size
* 2 * sizeof(char));
751 err(1, "Cannot allocate buffer to convert directory #%lu\n",
755 cdc
.bs
= MIN(DIRBLKSIZ
, TP_BSIZE
);
756 /* Do the conversion */
757 retval
= ext2fs_dir_iterate(fs
, ino
, 0, NULL
, convert_dir
, (void *)&cdc
);
759 com_err(disk
, retval
, "while converting directory #%ld\n", ino
);
762 /* Fix the last entry */
763 if ((cdc
.offset
% cdc
.bs
) != 0) {
764 de
= (struct ext2_dir_entry
*)(cdc
.buf
+ cdc
.prev_offset
);
765 de
->rec_len
+= cdc
.bs
- (cdc
.offset
% cdc
.bs
);
766 cdc
.offset
+= cdc
.bs
- (cdc
.offset
% cdc
.bs
);
769 dir_size
= cdc
.offset
;
772 memset(&obi
, 0, sizeof(obi
));
773 obi
.di_mode
= dp
->di_mode
;
774 obi
.di_uid
= dp
->di_uid
;
775 obi
.di_gid
= dp
->di_gid
;
776 obi
.di_qsize
.v
= dir_size
; /* (u_quad_t)dp->di_size; */
777 obi
.di_atime
= dp
->di_atime
;
778 obi
.di_mtime
= dp
->di_mtime
;
779 obi
.di_ctime
= dp
->di_ctime
;
780 obi
.di_nlink
= dp
->di_nlink
;
781 obi
.di_blocks
= dp
->di_blocks
;
782 obi
.di_flags
= dp
->di_flags
;
783 obi
.di_gen
= dp
->di_gen
;
784 memmove(&obi
.di_db
, &dp
->di_db
, (NDADDR
+ NIADDR
) * sizeof(daddr_t
));
785 if (dp
->di_file_acl
|| dp
->di_dir_acl
)
786 warn("ACLs in inode #%ld won't be dumped", ino
);
787 memmove(&spcl
.c_dinode
, &obi
, sizeof(obi
));
788 #else /* __linux__ */
790 #endif /* __linux__ */
791 spcl
.c_type
= TS_INODE
;
793 switch (dp
->di_mode
& S_IFMT
) {
804 msg("Warning: size of directory inode #%d is <= 0 (%d)!\n",
809 msg("Warning: dumpdirino called with file type 0%o (inode #%d)\n",
810 dp
->di_mode
& IFMT
, ino
);
813 for (size
= 0; size
< dir_size
; size
+= TP_BSIZE
) {
817 memmove(buf
, cdc
.buf
+ size
, TP_BSIZE
);
819 spcl
.c_type
= TS_ADDR
;
824 #endif /* __linux__ */
828 * Read indirect blocks, and pass the data blocks to be dumped.
831 dmpindir(ino_t ino
, daddr_t blk
, int ind_level
, fsizeT
*size
)
838 daddr_t idblk
[MAXNINDIR
];
841 bread(fsbtodb(sblock
, blk
), (char *)idblk
, (int) sblock
->fs_bsize
);
844 * My RedHat 4.0 system doesn't have these flags; I haven't
845 * upgraded e2fsprogs yet
847 #if defined(EXT2_FLAG_SWAP_BYTES)
848 if ((fs
->flags
& EXT2_FLAG_SWAP_BYTES
) ||
849 (fs
->flags
& EXT2_FLAG_SWAP_BYTES_READ
)) {
851 max
= sblock
->fs_bsize
>> 2;
852 swapme
= (blk_t
*) idblk
;
853 for (i
= 0; i
< max
; i
++, swapme
++)
854 *swapme
= swab32(*swapme
);
855 #if defined(EXT2_FLAG_SWAP_BYTES)
860 memset(idblk
, 0, (int)sblock
->fs_bsize
);
861 if (ind_level
<= 0) {
862 if (*size
< NINDIR(sblock
) * sblock
->fs_bsize
)
863 cnt
= howmany(*size
, sblock
->fs_fsize
);
866 cnt
= NINDIR(sblock
) * EXT2_FRAGS_PER_BLOCK(fs
->super
);
868 cnt
= NINDIR(sblock
) * sblock
->fs_frag
;
870 *size
-= NINDIR(sblock
) * sblock
->fs_bsize
;
871 blksout(&idblk
[0], cnt
, ino
);
875 for (i
= 0; i
< NINDIR(sblock
); i
++) {
876 dmpindir(ino
, idblk
[i
], ind_level
, size
);
884 * Collect up the data into tape record sized buffers and output them.
887 blksout(daddr_t
*blkp
, int frags
, ino_t ino
)
889 register daddr_t
*bp
;
890 int i
, j
, count
, blks
, tbperdb
;
892 blks
= howmany(frags
* sblock
->fs_fsize
, TP_BSIZE
);
893 tbperdb
= sblock
->fs_bsize
>> tp_bshift
;
894 for (i
= 0; i
< blks
; i
+= TP_NINDIR
) {
895 if (i
+ TP_NINDIR
> blks
)
898 count
= i
+ TP_NINDIR
;
899 for (j
= i
; j
< count
; j
++)
900 if (blkp
[j
/ tbperdb
] != 0)
901 spcl
.c_addr
[j
- i
] = 1;
903 spcl
.c_addr
[j
- i
] = 0;
904 spcl
.c_count
= count
- i
;
906 bp
= &blkp
[i
/ tbperdb
];
907 for (j
= i
; j
< count
; j
+= tbperdb
, bp
++) {
909 if (j
+ tbperdb
<= count
)
910 dumpblock(*bp
, (int)sblock
->fs_bsize
);
912 dumpblock(*bp
, (count
- j
) * TP_BSIZE
);
915 spcl
.c_type
= TS_ADDR
;
920 * Dump a map to the tape.
923 dumpmap(char *map
, int type
, ino_t ino
)
929 spcl
.c_count
= howmany(mapsize
* sizeof(char), TP_BSIZE
);
931 for (i
= 0, cp
= map
; i
< spcl
.c_count
; i
++, cp
+= TP_BSIZE
)
936 * Write a header record to the dump tape.
939 writeheader(ino_t ino
)
942 register __s32 sum
, cnt
, *lp
;
944 register int32_t sum
, cnt
, *lp
;
947 spcl
.c_inumber
= ino
;
948 spcl
.c_magic
= NFS_MAGIC
;
953 lp
= (int32_t *)&spcl
;
957 cnt
= sizeof(union u_spcl
) / (4 * sizeof(__s32
));
959 cnt
= sizeof(union u_spcl
) / (4 * sizeof(int32_t));
967 spcl
.c_checksum
= CHECKSUM
- sum
;
968 writerec((char *)&spcl
, 1);
975 static struct dinode dinode
;
978 ext2fs_read_inode(fs
, inum
, (struct ext2_inode
*) &dinode
);
981 #else /* __linux__ */
985 static daddr_t minino
, maxino
;
986 static struct dinode inoblock
[MAXINOPB
];
989 if (inum
>= minino
&& inum
< maxino
)
990 return (&inoblock
[inum
- minino
]);
991 bread(fsbtodb(sblock
, ino_to_fsba(sblock
, inum
)), (char *)inoblock
,
992 (int)sblock
->fs_bsize
);
993 minino
= inum
- (inum
% INOPB(sblock
));
994 maxino
= minino
+ INOPB(sblock
);
995 return (&inoblock
[inum
- minino
]);
997 #endif /* __linux__ */
1000 * Read a chunk of data from the disk.
1001 * Try to recover from hard errors by reading in sector sized pieces.
1002 * Error recovery is attempted at most BREADEMAX times before seeking
1003 * consent from the operator to continue.
1005 int breaderrors
= 0;
1006 #define BREADEMAX 32
1009 bread(daddr_t blkno
, char *buf
, int size
)
1016 if (llseek(diskfd
, ((ext2_loff_t
)blkno
<< dev_bshift
), 0) !=
1017 ((ext2_loff_t
)blkno
<< dev_bshift
))
1019 if (lseek(diskfd
, ((off_t
)blkno
<< dev_bshift
), 0) !=
1020 ((off_t
)blkno
<< dev_bshift
))
1022 msg("bread: lseek fails\n");
1023 if ((cnt
= read(diskfd
, buf
, size
)) == size
)
1025 if (blkno
+ (size
/ dev_bsize
) > fsbtodb(sblock
, sblock
->fs_size
)) {
1027 * Trying to read the final fragment.
1029 * NB - dump only works in TP_BSIZE blocks, hence
1030 * rounds `dev_bsize' fragments up to TP_BSIZE pieces.
1031 * It should be smarter about not actually trying to
1032 * read more than it can get, but for the time being
1033 * we punt and scale back the read only when it gets
1034 * us into trouble. (mkm 9/25/83)
1040 msg("read error from %s: %s: [block %d]: count=%d\n",
1041 disk
, strerror(errno
), blkno
, size
);
1043 msg("short read error from %s: [block %d]: count=%d, got=%d\n",
1044 disk
, blkno
, size
, cnt
);
1045 if (++breaderrors
> BREADEMAX
) {
1046 msg("More than %d block read errors from %d\n",
1048 broadcast("DUMP IS AILING!\n");
1049 msg("This is an unrecoverable error.\n");
1050 if (!query("Do you want to attempt to continue?")){
1057 * Zero buffer, then try to read each sector of buffer separately.
1059 memset(buf
, 0, size
);
1060 for (i
= 0; i
< size
; i
+= dev_bsize
, buf
+= dev_bsize
, blkno
++) {
1062 if (llseek(diskfd
, ((ext2_loff_t
)blkno
<< dev_bshift
), 0) !=
1063 ((ext2_loff_t
)blkno
<< dev_bshift
))
1065 if (lseek(diskfd
, ((off_t
)blkno
<< dev_bshift
), 0) !=
1066 ((off_t
)blkno
<< dev_bshift
))
1068 msg("bread: lseek2 fails!\n");
1069 if ((cnt
= read(diskfd
, buf
, (int)dev_bsize
)) == dev_bsize
)
1072 msg("read error from %s: %s: [sector %d]: count=%d\n",
1073 disk
, strerror(errno
), blkno
, dev_bsize
);
1076 msg("short read error from %s: [sector %d]: count=%d, got=%d\n",
1077 disk
, blkno
, dev_bsize
, cnt
);