136 lines
3.3 KiB
C
136 lines
3.3 KiB
C
/*
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* Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
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*/
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#define _GNU_SOURCE
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <time.h>
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#include <malloc.h>
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#include <sys/types.h>
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#include <asm/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include "io.h"
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#include "misc.h"
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#include "reiserfs_lib.h"
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#include "../version.h"
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/*
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* modes
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*/
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#define DO_DUMP 1 /* not a real dump, just printing to stdout contents of
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tree nodes */
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#define DO_CORRUPT 2 /* used to make filesystem corruption and then test fsck */
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#define DO_SCAN 3
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#define DO_SCAN_FOR_NAME 4
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#define DO_RECOVER 5
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#define DO_TEST 6
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#define DO_PACK 7 /* -p extract meta data of reiserfs filesystem */
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#define DO_PACK_ALL 8 /* -p */
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extern int opt_quiet;
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extern int mode;
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// the leaf is stored in compact form:
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// start magic number
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// block number __u32
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// item number __u16
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// struct packed_item
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// ..
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// end magic number
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/* we store hash code in high byte of 16 bits */
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#define LEAF_START_MAGIC 0xa5
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#define LEAF_END_MAGIC 0x5a
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#define FULL_BLOCK_START_MAGIC 0xb6
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#define FULL_BLOCK_END_MAGIC 0x6b
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#define UNFORMATTED_BITMAP_START_MAGIC 0xc7
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#define UNFORMATTED_BITMAP_END_MAGIC 0x7c
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#define END_MAGIC 0x8d
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#define INTERNAL_START_MAGIC
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#define INTERNAL_START_MAGIC
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#define ITEM_START_MAGIC 0x476576
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#define ITEM_END_MAGIC 0x2906504
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/* flags in packed item mask */
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#define NEW_FORMAT 1 // 0 here means - old format, 1 - new format
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#define DIR_ID 2
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#define OBJECT_ID 4
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#define OFFSET_BITS_32 8
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#define OFFSET_BITS_64 16
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#define ENTRY_COUNT 32 // shows whether ih_free_space/ih_entry_count is stored
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#define INDIRECT_ITEM 64
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#define DIRENTRY_ITEM 128
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#define DIRECT_ITEM 256
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#define STAT_DATA_ITEM 512
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#define ITEM_BODY 1024
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#define WHOLE_INDIRECT 128
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#define WITH_SD_FIRST_DIRECT_BYTE 8192 /* for old stat data first_direct_byte
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is stored */
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#define NLINK_BITS_32 8192 /* nlinks stored in 32 bits */
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#define SIZE_BITS_64 16384 /* size has to be stored in 64 bit */
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struct packed_item {
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/*__u16 length;*/ // length of the area we store item in
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__u16 mask; // what is stored: dirid, objectid, 32 bit offset or 64 bit offset, type
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__u16 item_len;
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};
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#define HAS_DIR_ID 1
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#define HAS_GEN_COUNTER 2
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#define HAS_STATE 4
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#define YURA 8
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#define TEA 16
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#define R5 32
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struct packed_dir_entry {
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__u8 mask;
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__u16 entrylen;
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};
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#define fread8(pv) fread (pv, sizeof (__u8), 1, stdin)
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#define fread16(pv) fread (pv, sizeof (__u16), 1, stdin)
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#define fread32(pv) fread (pv, sizeof (__u32), 1, stdin)
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#define fread64(pv) fread (pv, sizeof (__u64), 1, stdin)
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#define fwrite8(pv) {\
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if (fwrite (pv, sizeof (__u8), 1, stdout) != 1)\
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reiserfs_panic ("fwrite8 failed: %m");\
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}
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#define fwrite16(pv) {\
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if (fwrite (pv, sizeof (__u16), 1, stdout) != 1)\
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reiserfs_panic ("fwrite16 failed: %m");\
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}
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#define fwrite32(pv) {\
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if (fwrite (pv, sizeof (__u32), 1, stdout) != 1)\
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reiserfs_panic ("fwrite32 failed: %m");\
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}
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#define fwrite64(pv) {\
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if (fwrite (pv, sizeof (__u64), 1, stdout) != 1)\
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reiserfs_panic ("fwrite64 failed: %m");\
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}
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/*
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#define fwrite16(pv) fwrite (pv, sizeof (__u16), 1, stdout)
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#define fwrite32(pv) fwrite (pv, sizeof (__u32), 1, stdout)
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#define fwrite64(pv) fwrite (pv, sizeof (__u64), 1, stdout)
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*/
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#define BLOCKS_PER_READ 8
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extern char * where_to_save;
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