diff options
Diffstat (limited to 'libblkid/ntfs.c')
| -rw-r--r-- | libblkid/ntfs.c | 224 |
1 files changed, 0 insertions, 224 deletions
diff --git a/libblkid/ntfs.c b/libblkid/ntfs.c deleted file mode 100644 index 41c6b9cd5..000000000 --- a/libblkid/ntfs.c +++ /dev/null @@ -1,224 +0,0 @@ -/* - * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org> - * Copyright (C) 2008 Karel Zak <kzak@redhat.com> - * - * This file may be redistributed under the terms of the - * GNU Lesser General Public License. - */ -#include <stdio.h> -#include <stdlib.h> -#include <unistd.h> -#include <string.h> -#include <inttypes.h> - -#include "superblocks.h" - -struct ntfs_bios_parameters { - uint16_t sector_size; /* Size of a sector in bytes. */ - uint8_t sectors_per_cluster; /* Size of a cluster in sectors. */ - uint16_t reserved_sectors; /* zero */ - uint8_t fats; /* zero */ - uint16_t root_entries; /* zero */ - uint16_t sectors; /* zero */ - uint8_t media_type; /* 0xf8 = hard disk */ - uint16_t sectors_per_fat; /* zero */ - uint16_t sectors_per_track; /* irrelevant */ - uint16_t heads; /* irrelevant */ - uint32_t hidden_sectors; /* zero */ - uint32_t large_sectors; /* zero */ -} __attribute__ ((__packed__)); - -struct ntfs_super_block { - uint8_t jump[3]; - uint8_t oem_id[8]; /* magic string */ - - struct ntfs_bios_parameters bpb; - - uint16_t unused[2]; - uint64_t number_of_sectors; - uint64_t mft_cluster_location; - uint64_t mft_mirror_cluster_location; - int8_t clusters_per_mft_record; - uint8_t reserved1[3]; - int8_t cluster_per_index_record; - uint8_t reserved2[3]; - uint64_t volume_serial; - uint32_t checksum; -} __attribute__((packed)); - -struct master_file_table_record { - uint32_t magic; - uint16_t usa_ofs; - uint16_t usa_count; - uint64_t lsn; - uint16_t sequence_number; - uint16_t link_count; - uint16_t attrs_offset; - uint16_t flags; - uint32_t bytes_in_use; - uint32_t bytes_allocated; -} __attribute__((__packed__)); - -struct file_attribute { - uint32_t type; - uint32_t len; - uint8_t non_resident; - uint8_t name_len; - uint16_t name_offset; - uint16_t flags; - uint16_t instance; - uint32_t value_len; - uint16_t value_offset; -} __attribute__((__packed__)); - -#define MFT_RECORD_VOLUME 3 -#define NTFS_MAX_CLUSTER_SIZE (64 * 1024) - -enum { - MFT_RECORD_ATTR_VOLUME_NAME = cpu_to_le32(0x60), - MFT_RECORD_ATTR_END = cpu_to_le32(0xffffffff) -}; - -static int probe_ntfs(blkid_probe pr, const struct blkid_idmag *mag) -{ - struct ntfs_super_block *ns; - struct master_file_table_record *mft; - - uint32_t sectors_per_cluster, mft_record_size, attr_off; - uint16_t sector_size; - uint64_t nr_clusters, off; - unsigned char *buf_mft; - - ns = blkid_probe_get_sb(pr, mag, struct ntfs_super_block); - if (!ns) - return -1; - - /* - * Check bios parameters block - */ - sector_size = le16_to_cpu(ns->bpb.sector_size); - sectors_per_cluster = ns->bpb.sectors_per_cluster; - - if (sector_size < 256 || sector_size > 4096) - return 1; - - switch (sectors_per_cluster) { - case 1: case 2: case 4: case 8: case 16: case 32: case 64: case 128: - break; - default: - return 1; - } - - if ((uint16_t) le16_to_cpu(ns->bpb.sector_size) * - ns->bpb.sectors_per_cluster > NTFS_MAX_CLUSTER_SIZE) - return 1; - - /* Unused fields must be zero */ - if (le16_to_cpu(ns->bpb.reserved_sectors) - || le16_to_cpu(ns->bpb.root_entries) - || le16_to_cpu(ns->bpb.sectors) - || le16_to_cpu(ns->bpb.sectors_per_fat) - || le32_to_cpu(ns->bpb.large_sectors) - || ns->bpb.fats) - return 1; - - if ((uint8_t) ns->clusters_per_mft_record < 0xe1 - || (uint8_t) ns->clusters_per_mft_record > 0xf7) { - - switch (ns->clusters_per_mft_record) { - case 1: case 2: case 4: case 8: case 16: case 32: case 64: - break; - default: - return 1; - } - } - - if (ns->clusters_per_mft_record > 0) - mft_record_size = ns->clusters_per_mft_record * - sectors_per_cluster * sector_size; - else - mft_record_size = 1 << (0 - ns->clusters_per_mft_record); - - nr_clusters = le64_to_cpu(ns->number_of_sectors) / sectors_per_cluster; - - if ((le64_to_cpu(ns->mft_cluster_location) > nr_clusters) || - (le64_to_cpu(ns->mft_mirror_cluster_location) > nr_clusters)) - return 1; - - - off = le64_to_cpu(ns->mft_cluster_location) * sector_size * - sectors_per_cluster; - - DBG(DEBUG_LOWPROBE, printf("NTFS: sector_size=%d, mft_record_size=%d, " - "sectors_per_cluster=%d, nr_clusters=%ju " - "cluster_offset=%jd\n", - (int) sector_size, mft_record_size, - sectors_per_cluster, nr_clusters, - off)); - - buf_mft = blkid_probe_get_buffer(pr, off, mft_record_size); - if (!buf_mft) - return 1; - - if (memcmp(buf_mft, "FILE", 4)) - return 1; - - off += MFT_RECORD_VOLUME * mft_record_size; - - buf_mft = blkid_probe_get_buffer(pr, off, mft_record_size); - if (!buf_mft) - return 1; - - if (memcmp(buf_mft, "FILE", 4)) - return 1; - - mft = (struct master_file_table_record *) buf_mft; - attr_off = le16_to_cpu(mft->attrs_offset); - - while (attr_off < mft_record_size && - attr_off <= le32_to_cpu(mft->bytes_allocated)) { - - uint32_t attr_len; - struct file_attribute *attr; - - attr = (struct file_attribute *) (buf_mft + attr_off); - attr_len = le32_to_cpu(attr->len); - if (!attr_len) - break; - - if (attr->type == MFT_RECORD_ATTR_END) - break; - if (attr->type == MFT_RECORD_ATTR_VOLUME_NAME) { - unsigned int val_off = le16_to_cpu(attr->value_offset); - unsigned int val_len = le32_to_cpu(attr->value_len); - unsigned char *val = ((uint8_t *) attr) + val_off; - - blkid_probe_set_utf8label(pr, val, val_len, BLKID_ENC_UTF16LE); - break; - } - - if (UINT_MAX - attr_len < attr_off) - break; - attr_off += attr_len; - } - - blkid_probe_sprintf_uuid(pr, - (unsigned char *) &ns->volume_serial, - sizeof(ns->volume_serial), - "%016" PRIX64, le64_to_cpu(ns->volume_serial)); - return 0; -} - - -const struct blkid_idinfo ntfs_idinfo = -{ - .name = "ntfs", - .usage = BLKID_USAGE_FILESYSTEM, - .probefunc = probe_ntfs, - .magics = - { - { .magic = "NTFS ", .len = 8, .sboff = 3 }, - { NULL } - } -}; - |