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ntfs-3g/ntfsprogs/ntfsdump_logfile.c

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/**
* ntfsdump_logfile - Part of the Linux-NTFS project.
*
* Copyright (c) 2000-2004 Anton Altaparmakov
*
* This utility will interpret the contents of the journal ($LogFile) of an
* NTFS partition and display the results on stdout. Errors will be output to
* stderr.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (in the main directory of the Linux-NTFS source
* in the file COPYING); if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include "types.h"
#include "endians.h"
#include "volume.h"
#include "inode.h"
#include "attrib.h"
#include "layout.h"
#include "logfile.h"
#include "mst.h"
/**
* err_exit - error output and terminate
*/
void err_exit(const char *fmt, ...) __attribute__ ((noreturn));
void err_exit(const char *fmt, ...)
{
va_list ap;
fprintf(stderr, "ERROR: ");
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
fprintf(stderr, "Aborting...\n");
exit(1);
}
/**
* device_err_exit -
*/
void device_err_exit(char *dev_name, ntfs_volume *vol, ntfs_inode *ni,
ntfs_attr *na, const char *fmt, ...) __attribute__ ((noreturn));
void device_err_exit(char *dev_name, ntfs_volume *vol, ntfs_inode *ni,
ntfs_attr *na, const char *fmt, ...)
{
va_list ap;
if (na)
ntfs_attr_close(na);
if (ni && ntfs_inode_close(ni))
fprintf(stderr, "Warning: Failed to close $LogFile (inode "
"%i): %s\n", FILE_LogFile, strerror(errno));
if (ntfs_umount(vol, 0))
fprintf(stderr, "Warning: Failed to umount %s: %s\n",
dev_name, strerror(errno));
fprintf(stderr, "ERROR: ");
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
fprintf(stderr, "Aborting...\n");
exit(1);
}
/**
* usage -
*/
void usage(const char *exec_name) __attribute__ ((noreturn));
void usage(const char *exec_name)
{
fprintf(stderr, "%s v%s - Interpret and display information about the "
"journal\n($LogFile) of an NTFS volume.\n"
"Copyright (c) 2000-2004 Anton Altaparmakov.\n"
"%s is free software, released under the GNU General "
"Public License\nand you are welcome to redistribute "
"it under certain conditions.\n%s comes with "
"ABSOLUTELY NO WARRANTY; for details read the GNU\n"
"General Public License to be found in the file "
"COPYING in the main Linux-NTFS\ndistribution "
"directory.\nUsage: %s device\n e.g. %s /dev/hda6\n"
"Alternative usage: %s -f file\n e.g. %s -f "
"MyCopyOfTheLogFile\n", exec_name, VERSION, exec_name,
exec_name, exec_name, exec_name, exec_name, exec_name);
exit(1);
}
/**
* main -
*/
int main(int argc, char **argv)
{
u8 *buf;
RESTART_PAGE_HEADER *rstr;
RESTART_AREA *ra;
LOG_CLIENT_RECORD *lcr;
RECORD_PAGE_HEADER *rcrd;
LOG_RECORD *lr;
int buf_size, err, i, lps, client, pass = 1;
printf("\n");
if (argc < 2 || argc > 3)
usage(argv[0]);
/*
* If one argument, it is a device containing an NTFS volume which we
* need to mount and read the $LogFile from so we can dump its contents.
*
* If two arguments the first one must be "-f" and the second one is
* the path and name of the $LogFile (or copy thereof) which we need to
* read and dump the contents of.
*/
if (argc == 2) {
s64 br;
ntfs_volume *vol;
ntfs_inode *ni;
ntfs_attr *na;
vol = ntfs_mount(argv[1], MS_RDONLY);
if (!vol)
err_exit("Failed to mount %s: %s\n", argv[1],
strerror(errno));
printf("\nMounted NTFS volume %s (NTFS v%i.%i) on device %s.\n",
vol->vol_name ? vol->vol_name : "<NO_NAME>",
vol->major_ver, vol->minor_ver, argv[1]);
if (ntfs_version_is_supported(vol))
device_err_exit(argv[1], vol, NULL, NULL,
"Unsupported NTFS version.\n");
ni = ntfs_inode_open(vol, FILE_LogFile);
if (!ni)
device_err_exit(argv[1], vol, NULL, NULL, "Failed to "
"open $LogFile (inode %i): %s\n",
FILE_LogFile, strerror(errno));
na = ntfs_attr_open(ni, AT_DATA, AT_UNNAMED, 0);
if (!na)
device_err_exit(argv[1], vol, ni, NULL, "Failed to "
"open $LogFile/$DATA (attribute "
"0x%x): %s\n", le32_to_cpu(AT_DATA),
strerror(errno));
if (!na->data_size)
device_err_exit(argv[1], vol, ni, na, "$LogFile has "
"zero length. Run chkdsk /f to "
"correct this.\n");
if (na->data_size <= 64 * 1024 * 1024)
buf_size = na->data_size;
else {
fprintf(stderr, "Warning: $LogFile is too big. Only "
"analysing the first 64MiB.\n");
buf_size = 64 * 1024 * 1024;
}
/* For simplicity we read all of $LogFile/$DATA into memory. */
buf = malloc(buf_size);
if (!buf)
device_err_exit(argv[1], vol, ni, na, "Failed to "
"allocate buffer for $LogFile/$DATA: "
"%s", strerror(errno));
br = ntfs_attr_pread(na, 0, buf_size, buf);
if (br != buf_size) {
free(buf);
device_err_exit(argv[1], vol, ni, na, "Failed to read "
"$LogFile/$DATA: %s", br < 0 ?
strerror(errno) : "Partial read.");
}
ntfs_attr_close(na);
if (ntfs_inode_close(ni))
fprintf(stderr, "Warning: Failed to close $LogFile "
"(inode %i): %s\n", FILE_LogFile,
strerror(errno));
if (ntfs_umount(vol, 0))
fprintf(stderr, "Warning: Failed to umount %s: %s\n",
argv[1], strerror(errno));
} else /* if (argc == 3) */ {
ssize_t br;
int fd;
struct stat sbuf;
if (strncmp(argv[1], "-f", strlen("-f")))
usage(argv[0]);
if (stat(argv[2], &sbuf) == -1) {
if (errno == ENOENT)
err_exit("The file %s does not exist. Did "
"you specify it correctly?\n",
argv[2]);
err_exit("Error getting information about %s: %s\n",
argv[2], strerror(errno));
}
if (sbuf.st_size <= 64 * 1024 * 1024)
buf_size = sbuf.st_size;
else {
fprintf(stderr, "Warning: File %s is too big. Only "
"analysing the first 64MiB.\n",
argv[2]);
buf_size = 64 * 1024 * 1024;
}
/* For simplicity we read all of the file into memory. */
buf = malloc(buf_size);
if (!buf)
err_exit("Failed to allocate buffer for file data: %s",
strerror(errno));
fd = open(argv[2], O_RDONLY);
if (fd == -1) {
free(buf);
err_exit("Failed to open file %s: %s\n", argv[2],
strerror(errno));
}
/* Read in the file into the buffer. */
br = read(fd, buf, buf_size);
err = errno;
if (close(fd))
fprintf(stderr, "Warning: Failed to close file %s: "
"%s\n", argv[2], strerror(errno));
if (br != buf_size) {
free(buf);
err_exit("Failed to read data from %s: %s", argv[2],
br < 0 ? strerror(err) :
"Partial read.");
}
}
/*
* We now have the entirety of the journal ($LogFile/$DATA or argv[2])
* in the memory buffer buf and this has a size of buf_size. Note we
* apply a size capping at 64MiB, so if the journal is any bigger we
* only have the first 64MiB. This should not be a problem as I have
* never seen such a large $LogFile. Usually it is only a few MiB in
* size.
*/
// TODO: I am here... (AIA)
/* Check for presence of restart area signature. */
if (!ntfs_is_rstr_recordp(buf)) {
s8 *pos = (s8*)buf;
s8 *end = pos + buf_size;
while (pos < end && *pos == -1)
pos++;
free(buf);
if (pos != end)
err_exit("$LogFile contents are corrupt (magic RSTR "
"missing)!");
/* All bytes are -1. */
puts("$LogFile is not initialized.");
return 0;
}
/* Do the interpretation and display now. */
rstr = (RESTART_PAGE_HEADER*)buf;
lps = le32_to_cpu(rstr->log_page_size);
pass_loc:
if (ntfs_mst_post_read_fixup((NTFS_RECORD*)rstr, lps) ||
ntfs_is_baad_record(rstr->magic)) {
puts("$LogFile incomplete multi sector transfer detected! "
"Cannot handle this yet!");
goto log_file_error;
}
if ((pass == 2) && !memcmp(buf, rstr, lps)) {
printf("2nd restart area fully matches the 1st one. Skipping "
"display.\n");
goto skip_rstr_pass;
}
if (le16_to_cpu(rstr->major_ver != 1) ||
le16_to_cpu(rstr->minor_ver != 1)) {
fprintf(stderr, "$LogFile version %i.%i! Error: Unknown "
"$LogFile version!\n",
le16_to_cpu(rstr->major_ver),
le16_to_cpu(rstr->minor_ver));
goto log_file_error;
}
ra = (RESTART_AREA*)((u8*)rstr + le16_to_cpu(rstr->restart_offset));
lcr = (LOG_CLIENT_RECORD*)((u8*)ra +
le16_to_cpu(ra->client_array_offset));
/* Dump of the interpreted $LogFile restart area. */
if (pass == 1)
printf("\n$LogFile version %i.%i.\n",
le16_to_cpu(rstr->major_ver),
le16_to_cpu(rstr->minor_ver));
printf("\n%s restart area:\n", pass == 1? "1st": "2nd");
printf("magic = RSTR\n");
printf("ChkDskLsn = 0x%llx\n",
(unsigned long long)sle64_to_cpu(rstr->chkdsk_lsn));
printf("SystemPageSize = %u\n", le32_to_cpu(rstr->system_page_size));
printf("LogPageSize = %u\n", le32_to_cpu(rstr->log_page_size));
printf("RestartOffset = 0x%x\n", le16_to_cpu(rstr->restart_offset));
printf("\n(1st) restart record:\n");
printf("CurrentLsn = %llx\n",
(unsigned long long)sle64_to_cpu(ra->current_lsn));
printf("LogClients = %u\n", le16_to_cpu(ra->log_clients));
printf("ClientFreeList = %i\n", sle16_to_cpu(ra->client_free_list));
printf("ClientInUseList = %i\n", sle16_to_cpu(ra->client_in_use_list));
printf("Flags = 0x%x\n", le16_to_cpu(ra->flags));
printf("SeqNumberBits = %u (0x%x)\n", le32_to_cpu(ra->seq_number_bits),
le32_to_cpu(ra->seq_number_bits));
printf("RestartAreaLength = 0x%x\n",
le16_to_cpu(ra->restart_area_length));
printf("ClientArrayOffset = 0x%x\n",
le16_to_cpu(ra->client_array_offset));
printf("FileSize = %lld (0x%llx)\n",
(long long)sle64_to_cpu(ra->file_size),
(unsigned long long)sle64_to_cpu(ra->file_size));
if (sle64_to_cpu(ra->file_size) != buf_size)
puts("$LogFile restart area indicates a log file size"
"different from the actual size!");
printf("LastLsnDataLength = 0x%x\n",
le32_to_cpu(ra->last_lsn_data_length));
printf("RecordLength = 0x%x\n", le16_to_cpu(ra->record_length));
printf("LogPageDataOffset = 0x%x\n",
le16_to_cpu(ra->log_page_data_offset));
for (client = 0; client < le16_to_cpu(ra->log_clients); client++) {
printf("\nRestart client record number %i:\n", client);
printf("OldestLsn = 0x%llx\n", (unsigned long long)
sle64_to_cpu(lcr->oldest_lsn));
printf("ClientRestartLsn = 0x%llx\n", (unsigned long long)
sle64_to_cpu(lcr->client_restart_lsn));
printf("PrevClient = %i\n", sle16_to_cpu(lcr->prev_client));
printf("NextClient = %i\n", sle16_to_cpu(lcr->next_client));
printf("SeqNumber = 0x%llx\n", (unsigned long long)
le64_to_cpu(lcr->seq_number));
printf("ClientNameLength = 0x%x\n",
le32_to_cpu(lcr->client_name_length));
if (le32_to_cpu(lcr->client_name_length)) {
// convert to ascii and print out.
// printf("ClientName = %u\n", le16_to_cpu(lcr->client_name));
}
/* Size of a restart client record is fixed at 0xa0 bytes. */
lcr = (LOG_CLIENT_RECORD*)((u8*)lcr + 0xa0);
}
skip_rstr_pass:
if (pass == 1) {
rstr = (RESTART_PAGE_HEADER*)((u8*)rstr + lps);
++pass;
goto pass_loc;
}
rcrd = (RECORD_PAGE_HEADER*)rstr;
/* Reuse pass for log record clienter. */
pass = 0;
printf("\nFinished with restart area. Beginning with log area.\n");
rcrd_pass_loc:
rcrd = (RECORD_PAGE_HEADER*)((u8*)rcrd + lps);
if ((u8*)rcrd + lps > buf + buf_size)
goto end_of_rcrd_passes;
printf("\nLog record page number %i", pass);
if (!ntfs_is_rcrd_record(rcrd->magic)) {
for (i = 0; i < lps; i++)
if (((u8*)rcrd)[i] != (u8)-1)
break;
if (i < lps)
puts(" is corrupt (magic RCRD is missing).");
else
puts(" is empty.");
pass++;
goto rcrd_pass_loc;
} else
printf(":");
/* Dump log record page */
printf("\nmagic = RCRD\n");
printf("copy.last_lsn/file_offset = 0x%llx\n", (unsigned long long)
le64_to_cpu(rcrd->copy.last_lsn));
printf("flags = 0x%x\n", le32_to_cpu(rcrd->flags));
printf("page count = %i\n", le16_to_cpu(rcrd->page_count));
printf("page position = %i\n", le16_to_cpu(rcrd->page_position));
printf("header.next_record_offset = 0x%llx\n", (unsigned long long)
le64_to_cpu(rcrd->header.packed.next_record_offset));
printf("header.last_end_lsn = 0x%llx\n", (unsigned long long)
le64_to_cpu(rcrd->header.packed.last_end_lsn));
/*
* Where does the 0x40 come from? Is it just usa_offset +
* usa_client * 2 + 7 & ~7 or is it derived from somewhere?
*/
lr = (LOG_RECORD*)((u8*)rcrd + 0x40);
client = 0;
log_record_pass:
printf("\nLog record %i:\n", client);
printf("this lsn = 0x%llx\n",
(unsigned long long)le64_to_cpu(lr->this_lsn));
printf("client previous lsn = 0x%llx\n", (unsigned long long)
le64_to_cpu(lr->client_previous_lsn));
printf("client undo next lsn = 0x%llx\n", (unsigned long long)
le64_to_cpu(lr->client_undo_next_lsn));
printf("client data length = 0x%x\n",
le32_to_cpu(lr->client_data_length));
printf("client_id.seq_number = 0x%x\n",
le16_to_cpu(lr->client_id.seq_number));
printf("client_id.client_index = 0x%x\n",
le16_to_cpu(lr->client_id.client_index));
printf("record type = 0x%x\n", le32_to_cpu(lr->record_type));
printf("transaction_id = 0x%x\n", le32_to_cpu(lr->transaction_id));
printf("flags = 0x%x:", lr->flags);
if (!lr->flags)
printf(" NONE\n");
else {
int _b = 0;
if (lr->flags & LOG_RECORD_MULTI_PAGE) {
printf(" LOG_RECORD_MULTI_PAGE");
_b = 1;
}
if (lr->flags & ~LOG_RECORD_MULTI_PAGE) {
if (_b)
printf(" |");
printf(" Unknown flags");
}
printf("\n");
}
printf("redo_operation = 0x%x\n", le16_to_cpu(lr->redo_operation));
printf("undo_operation = 0x%x\n", le16_to_cpu(lr->undo_operation));
printf("redo_offset = 0x%x\n", le16_to_cpu(lr->redo_offset));
printf("redo_length = 0x%x\n", le16_to_cpu(lr->redo_length));
printf("undo_offset = 0x%x\n", le16_to_cpu(lr->undo_offset));
printf("undo_length = 0x%x\n", le16_to_cpu(lr->undo_length));
printf("target_attribute = 0x%x\n", le16_to_cpu(lr->target_attribute));
printf("lcns_to_follow = 0x%x\n", le16_to_cpu(lr->lcns_to_follow));
printf("record_offset = 0x%x\n", le16_to_cpu(lr->record_offset));
printf("attribute_offset = 0x%x\n", le16_to_cpu(lr->attribute_offset));
printf("target_vcn = 0x%llx\n",
(unsigned long long)sle64_to_cpu(lr->target_vcn));
if (le16_to_cpu(lr->lcns_to_follow) > 0)
printf("Array of lcns:\n");
for (i = 0; i < le16_to_cpu(lr->lcns_to_follow); i++)
printf("lcn_list[%i].lcn = 0x%llx\n", i, (unsigned long long)
sle64_to_cpu(lr->lcn_list[i].lcn));
client++;
lr = (LOG_RECORD*)((u8*)lr + 0x70);
if (((u8*)lr + 0x70 <= (u8*)rcrd +
le64_to_cpu(rcrd->header.packed.next_record_offset)))
goto log_record_pass;
pass++;
goto rcrd_pass_loc;
end_of_rcrd_passes:
log_file_error:
printf("\n");
free(buf);
return 0;
}
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