ntfsclone: the --metadata option will wipe the timestamps in the
index allocation attributes as well. This further decreases the compressed metadata image size by 10-25% and more importantly it eliminates non-interesting ntfscmp differences.edge.strict_endians
szaka
parent
ddc558f1ec
commit
b4fa78dc58
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@ -13,6 +13,10 @@ xx/xx/2006 - 1.13.1-WIP
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from an ntfs attribute. (Szaka)
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- libntfs: add ntfs_index_root_get() which reads the index root of
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an attribute. (Szaka)
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- ntfsclone: the --metadata option will wipe the timestamps in the
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index allocation attributes as well. This further decreases the
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compressed metadata image size by 10-25% and more importantly it
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eliminates non-interesting ntfscmp differences. (Szaka)
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27/02/2006 - 1.13.0 - Lots and lots and lots of fixes and enhancements.
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@ -1,7 +1,7 @@
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/**
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* ntfsclone - Part of the Linux-NTFS project.
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*
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* Copyright (c) 2003-2005 Szabolcs Szakacsits
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* Copyright (c) 2003-2006 Szabolcs Szakacsits
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* Copyright (c) 2004-2005 Anton Altaparmakov
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* Special image format support copyright (c) 2004 Per Olofsson
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*
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@ -62,10 +62,12 @@
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#include "bootsect.h"
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#include "device.h"
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#include "attrib.h"
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#include "mst.h"
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#include "volume.h"
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#include "mft.h"
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#include "bitmap.h"
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#include "inode.h"
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#include "index.h"
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#include "dir.h"
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#include "runlist.h"
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#include "ntfstime.h"
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@ -711,6 +713,107 @@ static void restore_image(void)
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}
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}
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static void wipe_index_entry_timestams(INDEX_ENTRY *e)
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{
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s64 timestamp = utc2ntfs(0);
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while (!(e->flags & INDEX_ENTRY_END)) {
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e->key.file_name.creation_time = timestamp;
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e->key.file_name.last_data_change_time = timestamp;
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e->key.file_name.last_mft_change_time = timestamp;
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e->key.file_name.last_access_time = timestamp;
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wiped_timestamp_data += 32;
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e = (INDEX_ENTRY *)((u8 *)e + le16_to_cpu(e->length));
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}
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}
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static void wipe_index_allocation_timestamps(ntfs_inode *ni, ATTR_RECORD *attr)
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{
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INDEX_ALLOCATION *indexa, *tmp_indexa;
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INDEX_ENTRY *entry;
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INDEX_ROOT *indexr;
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u8 *bitmap, *byte;
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int bit;
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ntfs_attr *na;
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ntfschar *name;
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u32 name_len;
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indexr = ntfs_index_root_get(ni, attr);
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if (!indexr) {
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ntfs_log_perror("Failed to read $INDEX_ROOT attribute");
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return;
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}
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if (indexr->type != AT_FILE_NAME)
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goto out_indexr;
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name = (ntfschar *)((u8 *)attr + le16_to_cpu(attr->name_offset));
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name_len = attr->name_length;
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byte = bitmap = ntfs_attr_readall(ni, AT_BITMAP, name, name_len, NULL);
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if (!byte) {
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ntfs_log_perror("Failed to read $BITMAP attribute");
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goto out_indexr;
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}
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na = ntfs_attr_open(ni, AT_INDEX_ALLOCATION, name, name_len);
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if (!na) {
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ntfs_log_perror("Failed to open $INDEX_ALLOCATION attribute");
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goto out_bitmap;
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}
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tmp_indexa = indexa = malloc(na->data_size);
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if (!tmp_indexa) {
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ntfs_log_perror("malloc failed");
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goto out_na;
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}
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if (ntfs_attr_pread(na, 0, na->data_size, indexa) != na->data_size) {
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ntfs_log_perror("Failed to read $INDEX_ALLOCATION attribute");
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goto out_indexa;
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}
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bit = 0;
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while ((u8 *)tmp_indexa < (u8 *)indexa + na->data_size) {
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if (*byte & (1 << bit)) {
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if (ntfs_mst_post_read_fixup((NTFS_RECORD *)tmp_indexa,
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indexr->index_block_size)) {
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ntfs_log_perror("Damaged INDX record");
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goto out_indexa;
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}
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entry = (INDEX_ENTRY *)((u8 *)tmp_indexa + le32_to_cpu(
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tmp_indexa->index.entries_offset) + 0x18);
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wipe_index_entry_timestams(entry);
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if (ntfs_mst_pre_write_fixup((NTFS_RECORD *)tmp_indexa,
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indexr->index_block_size)) {
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ntfs_log_perror("INDX write fixup failed");
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goto out_indexa;
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}
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}
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tmp_indexa = (INDEX_ALLOCATION *)((u8 *)tmp_indexa +
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indexr->index_block_size);
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bit++;
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if (bit > 7) {
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bit = 0;
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byte++;
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}
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}
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if (ntfs_rl_pwrite(vol, na->rl, 0, na->data_size, indexa) != na->data_size)
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ntfs_log_perror("ntfs_rl_pwrite failed");
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out_indexa:
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free(indexa);
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out_na:
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ntfs_attr_close(na);
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out_bitmap:
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free(bitmap);
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out_indexr:
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free(indexr);
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}
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static void wipe_index_root_timestamps(ATTR_RECORD *attr, s64 timestamp)
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{
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INDEX_ENTRY *entry;
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@ -850,6 +953,9 @@ static void walk_runs(struct ntfs_walk_cluster *walk)
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return;
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}
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if (wipe && walk->image->ctx->attr->type == AT_INDEX_ALLOCATION)
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wipe_index_allocation_timestamps(walk->image->ni, a);
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if (!(rl = ntfs_mapping_pairs_decompress(vol, a, NULL)))
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perr_exit("ntfs_decompress_mapping_pairs");
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Reference in New Issue