/** * ntfsck - Part of the Linux-NTFS project. * * Copyright (c) 2006 Yuval Fledel * * This utility will check and fix errors on an NTFS volume. * * 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 * distribution 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" #ifdef HAVE_STDIO_H #include #endif #ifdef HAVE_STDLIB_H #include #endif #ifdef HAVE_STRING_H #include #endif #ifdef HAVE_FCNTL_H #include #endif #include #include #include #include #include #include "cluster.h" #include "utils.h" #define RETURN_FS_ERRORS_CORRECTED (1) #define RETURN_SYSTEM_NEEDS_REBOOT (2) #define RETURN_FS_ERRORS_LEFT_UNCORRECTED (4) #define RETURN_OPERATIONAL_ERROR (8) #define RETURN_USAGE_OR_SYNTAX_ERROR (16) #define RETURN_CANCELLED_BY_USER (32) /* Where did 64 go? */ #define RETURN_SHARED_LIBRARY_ERROR (128) /* todo: command line: (everything is optional) * fsck-frontend options: * -C [fd] : display progress bar (send it to the file descriptor if specified) * -T : don't show the title on startup * fsck-checker options: * -a : auto-repair. no questions. (optional: if marked clean and -f not specified, just check if mounable) * -p : auto-repair safe. no questions (optional: same) * -n : only check. no repair. * -r : interactively repair. * -y : always yes. * -v : verbose. * -V : version. * taken from fsck.ext2 * -b sb : use the superblock from sb. For corrupted volumes. (do we want separete boot/mft options?) * -c : use badblocks(8) to find bad blocks (R/O mode) and add the findings to $Bad. * -C fd : write competion info to fd. If 0, print a completion bar. * -d : debugging output. * -D : rebalance indices. * -f : force checking even if marked clean. * -F : flush buffers before beginning. (for time-benchmarking) * -k : When used with -c, don't erase previous $Bad items. * -n : Open fs as readonly. assume always no. (why is it needed if -r is not specified?) * -t : Print time statistics. * taken from fsck.reiserfs * --rebuild-sb : try to find $MFT start and rebuild the boot sector. * --rebuild-tree : scan for items and rebuild the indices that point to them (0x30, $SDS, etc.) * --clean-reserved: zero rezerved fields. (use with care!) * --adjust-size -z: insert a sparse hole if the data_size is larger than the size marked in the runlist. * --logfile file : report corruptions (unlike other errors) to a file instead of stderr. * --nolog : don't report corruptions at all. * --quiet -q : no progress bar. * taken from fsck.msdos * -w : flush after every write. * - do n passes. (only 2 in fsck.msdos. second should not report errors. Bonus: stop when error list does not change) * taken from fsck.jfs * --omit-journal-reply: self-descriptive (why would someone do that?) * --replay-journal-only: self-descriptive. don't check otherwise. * taken from fsck.xfs * -s : only serious errors should be reported. * -i ino : verbose behaviour only for inode ino. * -b bno : verbose behaviour only for cluster bno. * -L : zero log. * inspired by others * - don't do cluster accounting. * - don't do mft record accounting. * - don't do file names accounting. * - don't do security_id accounting. * - don't check acl inheritance problems. * - undelete unused mft records. (bonus: different options for 100% salvagable and less) * - error-level-report n: only report errors above this error level * - error-level-repair n: only repair errors below this error level * - don't fail on ntfsclone metadata pruning. * signals: * SIGUSR1 : start displaying progress bar * SIGUSR2 : stop displaying progress bar. */ /* Assuming NO_NTFS_DEVICE_DEFAULT_IO_OPS is not set */ static int errors = 0; static int unsupported = 0; static short bytes_per_sector, sectors_per_cluster; //static s64 mft_offset, mftmirr_offset; static s64 current_mft_record; /** * This is just a preliminary volume. * Filled while checking the boot sector and used in the preliminary MFT check. */ //static ntfs_volume vol; static runlist_element *mft_rl, *mft_bitmap_rl; #define check_failed(FORMAT, ARGS...) \ do { \ errors++; \ ntfs_log_redirect(__FUNCTION__,__FILE__,__LINE__, \ NTFS_LOG_LEVEL_ERROR,NULL,FORMAT,##ARGS); \ } while (0); /** * 0 success. * 1 fail. */ static int assert_u32_equal(u32 val, u32 ok, const char *name) { if (val!=ok) { check_failed("Assertion failed for '%lld:%s'. should be 0x%x, " "was 0x%x.\n", (long long)current_mft_record, name, (int)ok, (int)val); //errors++; return 1; } return 0; } static int assert_u32_noteq(u32 val, u32 wrong, const char *name) { if (val==wrong) { check_failed("Assertion failed for '%lld:%s'. should not be " "0x%x.\n", (long long)current_mft_record, name, (int)wrong); return 1; } return 0; } static int assert_u32_lesseq(u32 val1, u32 val2, const char *name) { if (val1 > val2) { check_failed("Assertion failed for '%s'. 0x%x > 0x%x\n", name, (int)val1, (int)val2); //errors++; return 1; } return 0; } static int assert_u32_less(u32 val1, u32 val2, const char *name) { if (val1 >= val2) { check_failed("Assertion failed for '%s'. 0x%x >= 0x%x\n", name, (int)val1, (int)val2); //errors++; return 1; } return 0; } /** * Return: 0 ok, 1 error. * * todo: may we use ntfs_boot_sector_is_ntfs() instead? * It already does the checks but will not be able to fix anything. */ static BOOL verify_boot_sector(struct ntfs_device *dev, ntfs_volume *rawvol) { u8 buf[512]; NTFS_BOOT_SECTOR *ntfs_boot = (NTFS_BOOT_SECTOR *)&buf; //u32 bytes_per_cluster; current_mft_record = 9; if (ntfs_pread(dev, 0, sizeof(buf), buf) != sizeof(buf)) { check_failed("Failed to read boot sector.\n"); return 1; } if ((buf[0]!=0xeb) || ((buf[1]!=0x52) && (buf[1]!=0x5b)) || (buf[2]!=0x90)) { check_failed("Boot sector: Bad jump.\n"); } if (ntfs_boot->oem_id != magicNTFS) { check_failed("Boot sector: Bad NTFS magic.\n"); } bytes_per_sector = le16_to_cpu(ntfs_boot->bpb.bytes_per_sector); if (!bytes_per_sector) { check_failed("Boot sector: Bytes per sector is 0.\n"); } if (bytes_per_sector%512) { check_failed("Boot sector: Bytes per sector is not a multiple" " of 512.\n"); } sectors_per_cluster = ntfs_boot->bpb.sectors_per_cluster; // todo: if partition, query bios and match heads/tracks? */ // Initialize some values into rawvol. We will need those later. rawvol->dev = dev; ntfs_boot_sector_parse(rawvol, (NTFS_BOOT_SECTOR *)buf); return 0; } /** * Load the runlist of the attribute. * * Return NULL if an error. * The caller is responsible on freeing the allocated memory if the result is not NULL. * * Set size_of_file_record to some reasonable size when in doubt (the Windows default is 1024.) * * attr_type must be little endian. * * This function has code duplication with check_file_record() and * check_attr_record() but its goal is to be less strict. Thus the * duplicated checks are the minimal required for not crashing. * * Assumes dev is open. */ static runlist *load_runlist(ntfs_volume *rawvol, s64 offset_to_file_record, ATTR_TYPES attr_type, u32 size_of_file_record) { u8 *buf; u16 attrs_offset; u32 length; ATTR_RECORD *attr_rec; if (size_of_file_record<22) // offset to attrs_offset return NULL; buf = (u8*)ntfs_malloc(size_of_file_record); if (!buf) return NULL; if (ntfs_pread(rawvol->dev, offset_to_file_record, size_of_file_record, buf) != size_of_file_record) { check_failed("Failed to read file record at offset %lld (0x%llx).\n", (long long)offset_to_file_record, (long long)offset_to_file_record); return NULL; } attrs_offset = le16_to_cpu(((MFT_RECORD*)buf)->attrs_offset); // first attribute must be after the header. if (attrs_offset<42) { check_failed("First attribute must be after the header (%u).\n", (int)attrs_offset); } attr_rec = (ATTR_RECORD *)(buf + attrs_offset); //printf("uv1.\n"); while ((u8*)attr_rec<=buf+size_of_file_record-4) { //printf("Attr type: 0x%x.\n", attr_rec->type); // Check attribute record. (Only what is in the buffer) if (attr_rec->type==AT_END) { check_failed("Attribute 0x%x not found in file record at offset %lld (0x%llx).\n", (int)le32_to_cpu(attr_rec->type), (long long)offset_to_file_record, (long long)offset_to_file_record); return NULL; } if ((u8*)attr_rec>buf+size_of_file_record-8) { // not AT_END yet no room for the length field. check_failed("Attribute 0x%x is not AT_END, yet no " "room for the length field.\n", (int)le32_to_cpu(attr_rec->type)); return NULL; } length = le32_to_cpu(attr_rec->length); // Check that this attribute does not overflow the mft_record if ((u8*)attr_rec+length >= buf+size_of_file_record) { check_failed("Attribute (0x%x) is larger than FILE record at offset %lld (0x%llx).\n", (int)le32_to_cpu(attr_rec->type), (long long)offset_to_file_record, (long long)offset_to_file_record); return NULL; } // todo: what ATTRIBUTE_LIST (0x20)? if (attr_rec->type==attr_type) { // Eurika! // ntfs_mapping_pairs_decompress only use two values from vol. Just fake it. // todo: it will also use vol->major_ver if defined(DEBUG). But only for printing purposes. // Assume ntfs_boot_sector_parse() was called. return ntfs_mapping_pairs_decompress(rawvol, attr_rec, NULL); } attr_rec = (ATTR_RECORD*)((u8*)attr_rec+length); } // If we got here, there was an overflow. check_failed("file record corrupted at offset %lld (0x%llx).\n", (long long)offset_to_file_record, (long long)offset_to_file_record); return NULL; } /** * Return: >=0 last VCN * LCN_EINVAL error. */ static VCN get_last_vcn(runlist *rl) { VCN res; if (!rl) return LCN_EINVAL; res = LCN_EINVAL; while (rl->length) { ntfs_log_verbose("vcn: %lld, length: %lld.\n", (long long)rl->vcn, (long long)rl->length); if (rl->vcn<0) res = rl->vcn; else res = rl->vcn + rl->length; rl++; } return res; } static u32 mft_bitmap_records; static u8 *mft_bitmap_buf; /** * Assumes mft_bitmap_rl is initialized. * return: 0 ok. * RETURN_OPERATIONAL_ERROR on error. */ static int mft_bitmap_load(ntfs_volume *rawvol) { VCN vcn; u32 mft_bitmap_length; vcn = get_last_vcn(mft_bitmap_rl); if (vcn<=LCN_EINVAL) { mft_bitmap_buf = NULL; /* This case should not happen, not even with on-disk errors */ goto error; } mft_bitmap_length = vcn * rawvol->cluster_size; mft_bitmap_records = 8 * mft_bitmap_length * rawvol->cluster_size / rawvol->mft_record_size; //printf("sizes: %d, %d.\n", mft_bitmap_length, mft_bitmap_records); mft_bitmap_buf = (u8*)ntfs_malloc(mft_bitmap_length); if (!mft_bitmap_buf) goto error; if (ntfs_rl_pread(rawvol, mft_bitmap_rl, 0, mft_bitmap_length, mft_bitmap_buf)!=mft_bitmap_length) goto error; return 0; error: mft_bitmap_records = 0; ntfs_log_error("Could not load $MFT/Bitmap.\n"); return RETURN_OPERATIONAL_ERROR; } /** * -1 Error. * 0 Unused record * 1 Used record * * Assumes mft_bitmap_rl was initialized. */ static int mft_bitmap_get_bit(s64 mft_no) { if (mft_no>=mft_bitmap_records) return -1; return ntfs_bit_get(mft_bitmap_buf, mft_no); } /** * @attr_rec: The attribute record to check * @mft_rec: The parent FILE record. * @buflen: The size of the FILE record. * * Return: * NULL: Fatal error occured. Not sure where is the next record. * otherwise: pointer to the next attribute record. * * The function only check fields that are inside this attr record. * * Assumes mft_rec is current_mft_record. */ static ATTR_REC *check_attr_record(ATTR_REC *attr_rec, MFT_RECORD *mft_rec, u16 buflen) { u16 name_offset; u16 attrs_offset = le16_to_cpu(mft_rec->attrs_offset); u32 attr_type = le32_to_cpu(attr_rec->type); u32 length = le32_to_cpu(attr_rec->length); // Check that this attribute does not overflow the mft_record if ((u8*)attr_rec+length >= ((u8*)mft_rec)+buflen) { check_failed("Attribute (0x%x) is larger than FILE record (%lld).\n", (int)attr_type, (long long)current_mft_record); return NULL; } // Attr type must be a multiple of 0x10 and 0x10<=x<=0x100. if ((attr_type & ~0x0F0) && (attr_type != 0x100)) { check_failed("Unknown attribute type 0x%x.\n", (int)attr_type); goto check_attr_record_next_attr; } if (length<24) { check_failed("Attribute %lld:0x%x Length too short (%u).\n", (long long)current_mft_record, (int)attr_type, (int)length); goto check_attr_record_next_attr; } // If this is the first attribute: // todo: instance number must be smaller than next_instance. if ((u8*)attr_rec == ((u8*)mft_rec) + attrs_offset) { if (!mft_rec->base_mft_record) assert_u32_equal(attr_type, 0x10, "First attribute type"); // The following not always holds. // attr 0x10 becomes instance 1 and attr 0x40 becomes 0. //assert_u32_equal(attr_rec->instance, 0, // "First attribute instance number"); } else { assert_u32_noteq(attr_type, 0x10, "Not-first attribute type"); // The following not always holds. //assert_u32_noteq(attr_rec->instance, 0, // "Not-first attribute instance number"); } //if (current_mft_record==938 || current_mft_record==1683 || current_mft_record==3152 || current_mft_record==22410) //printf("Attribute %lld:0x%x instance: %u isbase:%d.\n", // current_mft_record, (int)attr_type, (int)le16_to_cpu(attr_rec->instance), (int)mft_rec->base_mft_record); // todo: instance is unique. // Check flags. if (attr_rec->flags & ~(const_cpu_to_le16(0xc0ff))) { check_failed("Attribute %lld:0x%x Unknown flags (0x%x).\n", (long long)current_mft_record, (int)attr_type, (int)le16_to_cpu(attr_rec->flags)); } if (attr_rec->non_resident>1) { check_failed("Attribute %lld:0x%x Unknown non-resident " "flag (0x%x).\n", (long long)current_mft_record, (int)attr_type, (int)attr_rec->non_resident); goto check_attr_record_next_attr; } name_offset = le16_to_cpu(attr_rec->name_offset); /* * todo: name must be legal unicode. * Not really, information below in urls is about filenames, but I * believe it also applies to attribute names. (Yura) * http://blogs.msdn.com/michkap/archive/2006/09/24/769540.aspx * http://blogs.msdn.com/michkap/archive/2006/09/10/748699.aspx */ if (attr_rec->non_resident) { // Non-Resident // Make sure all the fields exist. if (length<64) { check_failed("Non-resident attribute %lld:0x%x too short (%u).\n", (long long)current_mft_record, (int)attr_type, (int)length); goto check_attr_record_next_attr; } if (attr_rec->compression_unit && (length<72)) { check_failed("Compressed attribute %lld:0x%x too short (%u).\n", (long long)current_mft_record, (int)attr_type, (int)length); goto check_attr_record_next_attr; } // todo: name comes before mapping pairs, and after the header. // todo: length==mapping_pairs_offset+length of compressed mapping pairs. // todo: mapping_pairs_offset is 8-byte aligned. // todo: lowest vcn <= highest_vcn // todo: if base record -> lowest vcn==0 // todo: lowest_vcn!=0 -> attribute list is used. // todo: lowest_vcn & highest_vcn are in the drive (0<=xvalue_offset); u32 value_length = le32_to_cpu(attr_rec->value_length); // Resident if (attr_rec->name_length) { if (name_offset < 24) check_failed("Resident attribute with " "name intersecting header.\n"); if (value_offset < name_offset + attr_rec->name_length) check_failed("Named resident attribute " "with value before name.\n"); } // if resident, length==value_length+value_offset //assert_u32_equal(le32_to_cpu(attr_rec->value_length)+ // value_offset, length, // "length==value_length+value_offset"); // if resident, length==value_length+value_offset if (value_length+value_offset > length) { check_failed("value_length(%d)+value_offset(%d)>length(%d) for attribute 0x%x.\n", (int)value_length, (int)value_offset, (int)length, (int)attr_type); return NULL; } // Check resident_flags. if (attr_rec->resident_flags>0x01) { check_failed("Unknown resident flags (0x%x) for attribute 0x%x.\n", (int)attr_rec->resident_flags, (int)attr_type); } else if (attr_rec->resident_flags && (attr_type!=0x30)) { check_failed("Resident flags mark attribute 0x%x as indexed.\n", (int)attr_type); } // reservedR is 0. assert_u32_equal(attr_rec->reservedR, 0, "Resident Reserved"); // todo: attribute must not be 0xa0 (not sure about 0xb0, 0xe0, 0xf0) // todo: check content well-formness per attr_type. } return 0; check_attr_record_next_attr: return (ATTR_REC *)(((u8 *)attr_rec) + length); } /** * All checks that can be satisfied only by data from the buffer. * No other [MFT records/metadata files] are required. * * The buffer is changed by removing the Update Sequence. * * Return: * 0 Everything's cool. * else Consider this record as damaged. */ static BOOL check_file_record(u8 *buffer, u16 buflen) { u16 usa_count, usa_ofs, attrs_offset, usa; u32 bytes_in_use, bytes_allocated, i; MFT_RECORD *mft_rec = (MFT_RECORD *)buffer; ATTR_REC *attr_rec; // check record magic assert_u32_equal(le32_to_cpu(mft_rec->magic), le32_to_cpu(magic_FILE), "FILE record magic"); // todo: records 16-23 must be filled in order. // todo: what to do with magic_BAAD? // check usa_count+offset to update seq <= attrs_offset < // bytes_in_use <= bytes_allocated <= buflen. usa_ofs = le16_to_cpu(mft_rec->usa_ofs); usa_count = le16_to_cpu(mft_rec->usa_count); attrs_offset = le16_to_cpu(mft_rec->attrs_offset); bytes_in_use = le32_to_cpu(mft_rec->bytes_in_use); bytes_allocated = le32_to_cpu(mft_rec->bytes_allocated); if (assert_u32_lesseq(usa_ofs+usa_count, attrs_offset, "usa_ofs+usa_count <= attrs_offset") || assert_u32_less(attrs_offset, bytes_in_use, "attrs_offset < bytes_in_use") || assert_u32_lesseq(bytes_in_use, bytes_allocated, "bytes_in_use <= bytes_allocated") || assert_u32_lesseq(bytes_allocated, buflen, "bytes_allocated <= max_record_size")) { return 1; } // We should know all the flags. if (le16_to_cpu(mft_rec->flags) > 0xf) { check_failed("Unknown MFT record flags (0x%x).\n", (unsigned int)le16_to_cpu(mft_rec->flags)); } // todo: flag in_use must be on. // Remove update seq & check it. usa = *(u16*)(buffer+usa_ofs); // The value that should be at the end of every sector. if (assert_u32_equal(usa_count-1, buflen/NTFS_BLOCK_SIZE, "USA length")) return (1); for (i=1;itype==AT_END) { // Done. return 0; } if ((u8*)attr_rec>buffer+buflen-8) { // not AT_END yet no room for the length field. check_failed("Attribute 0x%x is not AT_END, yet no " "room for the length field.\n", (int)le32_to_cpu(attr_rec->type)); return 1; } attr_rec = check_attr_record(attr_rec, mft_rec, buflen); if (!attr_rec) return 1; } // If we got here, there was an overflow. return 1; // todo: an attribute should be at the offset to first attribute, and the offset should be inside the buffer. It should have the value of "next attribute id". // todo: if base record, it should start with attribute 0x10. // Highlevel check of attributes. // todo: Attributes are well-formed. // todo: Room for next attribute in the end of the previous record. return FALSE; } static void replay_log(ntfs_volume *vol __attribute__((unused))) { // At this time, only check that the log is fully replayed. ntfs_log_warning("Unsupported: replay_log()\n"); // todo: if logfile is clean, return success. unsupported++; } static void verify_mft_record(ntfs_volume *vol, s64 mft_num) { u8 *buffer; int is_used; current_mft_record = mft_num; is_used = mft_bitmap_get_bit(mft_num); if (is_used<0) { ntfs_log_error("Error getting bit value for record %lld.\n", (long long)mft_num); } else if (!is_used) { ntfs_log_verbose("Record %lld unused. Skipping.\n", (long long)mft_num); return; } buffer = ntfs_malloc(vol->mft_record_size); if (!buffer) goto verify_mft_record_error; ntfs_log_verbose("MFT record %lld\n", (long long)mft_num); if (ntfs_attr_pread(vol->mft_na, mft_num*vol->mft_record_size, vol->mft_record_size, buffer) < 0) { ntfs_log_perror("Couldn't read $MFT record %lld", (long long)mft_num); goto verify_mft_record_error; } check_file_record(buffer, vol->mft_record_size); // todo: if offset to first attribute >= 0x30, number of mft record should match. // todo: Match the "record is used" with the mft bitmap. // todo: if this is not base, check that the parent is a base, and is in use, and pointing to this record. // todo: if base record: for each extent record: // todo: verify_file_record // todo: hard link count should be the number of 0x30 attributes. // todo: Order of attributes. // todo: make sure compression_unit is the same. return; verify_mft_record_error: if (buffer) free(buffer); errors++; } /** * This function serves as bootstraping for the more comprehensive checks. * It will load the MFT runlist and MFT/Bitmap runlist. * It should not depend on other checks or we may have a circular dependancy. * Also, this loadng must be forgiving, unlike the comprehensive checks. */ static int verify_mft_preliminary(ntfs_volume *rawvol) { current_mft_record = 0; s64 mft_offset, mftmirr_offset; int res; ntfs_log_trace("Entering verify_mft_preliminary().\n"); // todo: get size_of_file_record from boot sector // Load the first segment of the $MFT/DATA runlist. mft_offset = rawvol->mft_lcn * rawvol->cluster_size; mftmirr_offset = rawvol->mftmirr_lcn * rawvol->cluster_size; mft_rl = load_runlist(rawvol, mft_offset, AT_DATA, 1024); if (!mft_rl) { check_failed("Loading $MFT runlist failed. Trying $MFTMirr.\n"); mft_rl = load_runlist(rawvol, mftmirr_offset, AT_DATA, 1024); } if (!mft_rl) { check_failed("Loading $MFTMirr runlist failed too. Aborting.\n"); return RETURN_FS_ERRORS_LEFT_UNCORRECTED | RETURN_OPERATIONAL_ERROR; } // TODO: else { recover $MFT } // Use $MFTMirr to recover $MFT. // todo: support loading the next runlist extents when ATTRIBUTE_LIST is used on $MFT. // If attribute list: Gradually load mft runlist. (parse runlist from first file record, check all referenced file records, continue with the next file record). If no attribute list, just load it. // Load the runlist of $MFT/Bitmap. // todo: what about ATTRIBUTE_LIST? Can we reuse code? mft_bitmap_rl = load_runlist(rawvol, mft_offset, AT_BITMAP, 1024); if (!mft_bitmap_rl) { check_failed("Loading $MFT/Bitmap runlist failed. Trying $MFTMirr.\n"); mft_bitmap_rl = load_runlist(rawvol, mftmirr_offset, AT_BITMAP, 1024); } if (!mft_bitmap_rl) { check_failed("Loading $MFTMirr/Bitmap runlist failed too. Aborting.\n"); return RETURN_FS_ERRORS_LEFT_UNCORRECTED; // todo: rebuild the bitmap by using the "in_use" file record flag or by filling it with 1's. } /* Load $MFT/Bitmap */ if ((res = mft_bitmap_load(rawvol))) return res; return -1; /* FIXME: Just added to fix compiler warning without thinking about what should be here. (Yura) */ } static void check_volume(ntfs_volume *vol) { s64 mft_num, nr_mft_records; ntfs_log_warning("Unsupported: check_volume()\n"); unsupported++; // For each mft record, verify that it contains a valid file record. nr_mft_records = vol->mft_na->initialized_size >> vol->mft_record_size_bits; ntfs_log_info("Checking %lld MFT records.\n", (long long)nr_mft_records); for (mft_num=0; mft_num < nr_mft_records; mft_num++) { verify_mft_record(vol, mft_num); } // todo: Check metadata files. // todo: Second pass on mft records. Now check the contents as well. // todo: When going through runlists, build a bitmap. // todo: cluster accounting. return; } static int reset_dirty(ntfs_volume *vol) { le16 flags; if (!(vol->flags | VOLUME_IS_DIRTY)) return 0; ntfs_log_verbose("Resetting dirty flag.\n"); flags = vol->flags & ~VOLUME_IS_DIRTY; if (ntfs_volume_write_flags(vol, flags)) { ntfs_log_error("Error setting volume flags.\n"); return -1; } return 0; } /** * main - Does just what C99 claim it does. * * For more details on arguments and results, check the man page. */ int main(int argc, char **argv) { struct ntfs_device *dev; ntfs_volume rawvol; ntfs_volume *vol; const char *name; int ret; if (argc != 2) return RETURN_USAGE_OR_SYNTAX_ERROR; name = argv[1]; ntfs_log_set_handler(ntfs_log_handler_outerr); //ntfs_log_set_levels(NTFS_LOG_LEVEL_DEBUG | NTFS_LOG_LEVEL_TRACE | NTFS_LOG_LEVEL_QUIET | NTFS_LOG_LEVEL_INFO | NTFS_LOG_LEVEL_VERBOSE | NTFS_LOG_LEVEL_PROGRESS); /* Allocate an ntfs_device structure. */ dev = ntfs_device_alloc(name, 0, &ntfs_device_default_io_ops, NULL); if (!dev) return RETURN_OPERATIONAL_ERROR; if (dev->d_ops->open(dev, O_RDONLY)) { //O_RDWR/O_RDONLY? ntfs_log_perror("Error opening partition device"); ntfs_device_free(dev); return RETURN_OPERATIONAL_ERROR; } if ((ret = verify_boot_sector(dev,&rawvol))) { dev->d_ops->close(dev); return ret; } ntfs_log_verbose("Boot sector verification complete. Proceeding to $MFT"); verify_mft_preliminary(&rawvol); /* ntfs_device_mount() expects the device to be closed. */ if (dev->d_ops->close(dev)) ntfs_log_perror("Failed to close the device."); // at this point we know that the volume is valid enough for mounting. /* Call ntfs_device_mount() to do the actual mount. */ vol = ntfs_device_mount(dev, NTFS_MNT_RDONLY); if (!vol) { ntfs_device_free(dev); return 2; } replay_log(vol); if (vol->flags & VOLUME_IS_DIRTY) ntfs_log_warning("Volume is dirty.\n"); check_volume(vol); if (errors) ntfs_log_info("Errors found.\n"); if (unsupported) ntfs_log_info("Unsupported cases found.\n"); if (!errors && !unsupported) { reset_dirty(vol); } ntfs_umount(vol, FALSE); if (errors) return 2; if (unsupported) return 1; return 0; }