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-rw-r--r--libparted/fs/fat/bootsector.c271
-rw-r--r--libparted/fs/fat/bootsector.h126
-rw-r--r--libparted/fs/fat/count.h46
-rw-r--r--libparted/fs/fat/fat.c162
-rw-r--r--libparted/fs/fat/fat.h163
5 files changed, 768 insertions, 0 deletions
diff --git a/libparted/fs/fat/bootsector.c b/libparted/fs/fat/bootsector.c
new file mode 100644
index 0000000..f02685b
--- /dev/null
+++ b/libparted/fs/fat/bootsector.c
@@ -0,0 +1,271 @@
+/*
+ libparted
+ Copyright (C) 1998-2000, 2002, 2004, 2007, 2009-2014, 2019-2023 Free
+ Software Foundation, Inc.
+
+ 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 3 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. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <config.h>
+#include "fat.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+
+/* Reads in the boot sector (superblock), and does a minimum of sanity
+ * checking. The goals are:
+ * - to detect fat file systems, even if they are damaged [i.e. not
+ * return an error / throw an exception]
+ * - to fail detection if there's not enough information for
+ * fat_boot_sector_probe_type() to work (or possibly crash on a divide-by-zero)
+ */
+int
+fat_boot_sector_read (FatBootSector** bsp, const PedGeometry *geom)
+{
+ PED_ASSERT (bsp != NULL);
+ PED_ASSERT (geom != NULL);
+
+ if (!ped_geometry_read_alloc (geom, (void **)bsp, 0, 1))
+ return 0;
+ FatBootSector *bs = *bsp;
+
+ if (PED_LE16_TO_CPU (bs->boot_sign) != 0xAA55) {
+ ped_exception_throw (PED_EXCEPTION_ERROR, PED_EXCEPTION_CANCEL,
+ _("File system has an invalid signature for a FAT "
+ "file system."));
+ return 0;
+ }
+
+ if (!bs->sector_size
+ || PED_LE16_TO_CPU (bs->sector_size) % PED_SECTOR_SIZE_DEFAULT) {
+ ped_exception_throw (PED_EXCEPTION_ERROR, PED_EXCEPTION_CANCEL,
+ _("File system has an invalid sector size for a FAT "
+ "file system."));
+ return 0;
+ }
+
+ if (!bs->cluster_size) {
+ ped_exception_throw (PED_EXCEPTION_ERROR, PED_EXCEPTION_CANCEL,
+ _("File system has an invalid cluster size for a FAT "
+ "file system."));
+ return 0;
+ }
+
+ if (!bs->reserved) {
+ ped_exception_throw (PED_EXCEPTION_ERROR, PED_EXCEPTION_CANCEL,
+ _("File system has an invalid number of reserved "
+ "sectors for a FAT file system."));
+ return 0;
+ }
+
+ if (bs->fats < 1 || bs->fats > 4) {
+ ped_exception_throw (PED_EXCEPTION_ERROR, PED_EXCEPTION_CANCEL,
+ _("File system has an invalid number of FATs."));
+ return 0;
+ }
+
+ return 1;
+}
+
+/*
+ Don't trust the FAT12, FAT16 or FAT32 label string.
+ */
+FatType _GL_ATTRIBUTE_PURE
+fat_boot_sector_probe_type (const FatBootSector* bs, const PedGeometry* geom)
+{
+ PedSector logical_sector_size;
+ PedSector first_cluster_sector;
+ FatCluster cluster_count;
+
+ if (!PED_LE16_TO_CPU (bs->dir_entries))
+ return FAT_TYPE_FAT32;
+
+ logical_sector_size = PED_LE16_TO_CPU (bs->sector_size) / 512;
+
+ first_cluster_sector
+ = PED_LE16_TO_CPU (bs->reserved) * logical_sector_size
+ + 2 * PED_LE16_TO_CPU (bs->fat_length) * logical_sector_size
+ + PED_LE16_TO_CPU (bs->dir_entries)
+ / (512 / sizeof (FatDirEntry));
+ cluster_count = (geom->length - first_cluster_sector)
+ / bs->cluster_size / logical_sector_size;
+ if (cluster_count > MAX_FAT12_CLUSTERS)
+ return FAT_TYPE_FAT16;
+ else
+ return FAT_TYPE_FAT12;
+}
+
+static int
+_fat_table_entry_size (FatType fat_type)
+{
+ switch (fat_type) {
+ case FAT_TYPE_FAT12:
+ return 2; /* FIXME: how? */
+
+ case FAT_TYPE_FAT16:
+ return 2;
+
+ case FAT_TYPE_FAT32:
+ return 4;
+ }
+
+ return 0;
+}
+
+/* Analyses the boot sector, and sticks appropriate numbers in
+ fs->type_specific.
+
+ Note: you need to subtract (2 * cluster_sectors) off cluster offset,
+ because the first cluster is number 2. (0 and 1 are not real clusters,
+ and referencing them is a bug)
+ */
+int
+fat_boot_sector_analyse (FatBootSector* bs, PedFileSystem* fs)
+{
+ FatSpecific* fs_info = FAT_SPECIFIC (fs);
+ int fat_entry_size;
+
+ PED_ASSERT (bs != NULL);
+
+ fs_info->logical_sector_size = PED_LE16_TO_CPU (bs->sector_size) / 512;
+
+ fs_info->sectors_per_track = PED_LE16_TO_CPU (bs->secs_track);
+ fs_info->heads = PED_LE16_TO_CPU (bs->heads);
+ if (fs_info->sectors_per_track < 1 || fs_info->sectors_per_track > 63
+ || fs_info->heads < 1 || fs_info->heads > 255) {
+ PedCHSGeometry* bios_geom = &fs->geom->dev->bios_geom;
+ int cyl_count = 0;
+
+ if (fs_info->heads > 0 && fs_info->sectors_per_track > 0)
+ cyl_count = fs->geom->dev->length / fs_info->heads
+ / fs_info->sectors_per_track;
+
+ switch (ped_exception_throw (
+ PED_EXCEPTION_ERROR,
+ PED_EXCEPTION_IGNORE_CANCEL,
+ _("The file system's CHS geometry is (%d, %d, %d), "
+ "which is invalid. The partition table's CHS "
+ "geometry is (%d, %d, %d)."),
+ cyl_count, fs_info->heads, fs_info->sectors_per_track,
+ bios_geom->cylinders, bios_geom->heads,
+ bios_geom->sectors)) {
+
+ case PED_EXCEPTION_CANCEL:
+ return 0;
+
+ case PED_EXCEPTION_IGNORE:
+ break;
+
+ default:
+ break;
+ }
+ }
+
+ if (bs->sectors)
+ fs_info->sector_count = PED_LE16_TO_CPU (bs->sectors)
+ * fs_info->logical_sector_size;
+ else
+ fs_info->sector_count = PED_LE32_TO_CPU (bs->sector_count)
+ * fs_info->logical_sector_size;
+
+ fs_info->fat_table_count = bs->fats;
+ fs_info->root_dir_entry_count = PED_LE16_TO_CPU (bs->dir_entries);
+ fs_info->fat_offset = PED_LE16_TO_CPU (bs->reserved)
+ * fs_info->logical_sector_size;
+ fs_info->cluster_sectors = bs->cluster_size
+ * fs_info->logical_sector_size;
+ fs_info->cluster_size = fs_info->cluster_sectors * 512;
+
+ if (fs_info->logical_sector_size == 0) {
+ ped_exception_throw (PED_EXCEPTION_ERROR, PED_EXCEPTION_CANCEL,
+ _("FAT boot sector says logical sector size is 0. "
+ "This is weird. "));
+ return 0;
+ }
+ if (fs_info->fat_table_count == 0) {
+ ped_exception_throw (PED_EXCEPTION_ERROR, PED_EXCEPTION_CANCEL,
+ _("FAT boot sector says there are no FAT tables. This "
+ "is weird. "));
+ return 0;
+ }
+ if (fs_info->cluster_sectors == 0) {
+ ped_exception_throw (PED_EXCEPTION_ERROR, PED_EXCEPTION_CANCEL,
+ _("FAT boot sector says clusters are 0 sectors. This "
+ "is weird. "));
+ return 0;
+ }
+
+ fs_info->fat_type = fat_boot_sector_probe_type (bs, fs->geom);
+ if (fs_info->fat_type == FAT_TYPE_FAT12) {
+ ped_exception_throw (
+ PED_EXCEPTION_NO_FEATURE,
+ PED_EXCEPTION_CANCEL,
+ _("File system is FAT12, which is unsupported."));
+ return 0;
+ }
+ if (fs_info->fat_type == FAT_TYPE_FAT16) {
+ fs_info->fat_sectors = PED_LE16_TO_CPU (bs->fat_length)
+ * fs_info->logical_sector_size;
+ fs_info->serial_number
+ = PED_LE32_TO_CPU (bs->u.fat16.serial_number);
+ fs_info->root_cluster = 0;
+ fs_info->root_dir_offset
+ = fs_info->fat_offset
+ + fs_info->fat_sectors * fs_info->fat_table_count;
+ fs_info->root_dir_sector_count
+ = fs_info->root_dir_entry_count * sizeof (FatDirEntry)
+ / (512 * fs_info->logical_sector_size);
+ fs_info->cluster_offset
+ = fs_info->root_dir_offset
+ + fs_info->root_dir_sector_count;
+ }
+ if (fs_info->fat_type == FAT_TYPE_FAT32) {
+ fs_info->fat_sectors = PED_LE32_TO_CPU (bs->u.fat32.fat_length)
+ * fs_info->logical_sector_size;
+ fs_info->serial_number
+ = PED_LE32_TO_CPU (bs->u.fat32.serial_number);
+ fs_info->info_sector_offset
+ = PED_LE16_TO_CPU (fs_info->boot_sector->u.fat32.info_sector)
+ * fs_info->logical_sector_size;
+ fs_info->boot_sector_backup_offset
+ = PED_LE16_TO_CPU (fs_info->boot_sector->u.fat32.backup_sector)
+ * fs_info->logical_sector_size;
+ fs_info->root_cluster
+ = PED_LE32_TO_CPU (bs->u.fat32.root_dir_cluster);
+ fs_info->root_dir_offset = 0;
+ fs_info->root_dir_sector_count = 0;
+ fs_info->cluster_offset
+ = fs_info->fat_offset
+ + fs_info->fat_sectors * fs_info->fat_table_count;
+ }
+
+ fs_info->cluster_count
+ = (fs_info->sector_count - fs_info->cluster_offset)
+ / fs_info->cluster_sectors;
+
+ fat_entry_size = _fat_table_entry_size (fs_info->fat_type);
+ if (fs_info->cluster_count + 2
+ > fs_info->fat_sectors * 512 / fat_entry_size)
+ fs_info->cluster_count
+ = fs_info->fat_sectors * 512 / fat_entry_size - 2;
+
+ fs_info->dir_entries_per_cluster
+ = fs_info->cluster_size / sizeof (FatDirEntry);
+ return 1;
+}
diff --git a/libparted/fs/fat/bootsector.h b/libparted/fs/fat/bootsector.h
new file mode 100644
index 0000000..328ba2f
--- /dev/null
+++ b/libparted/fs/fat/bootsector.h
@@ -0,0 +1,126 @@
+/*
+ libparted
+ Copyright (C) 1998-2000, 2007, 2009-2014, 2019-2023 Free Software
+ Foundation, Inc.
+
+ 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 3 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. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef PED_FAT_BOOTSECTOR_H
+#define PED_FAT_BOOTSECTOR_H
+
+typedef struct _FatBootSector FatBootSector;
+typedef struct _FatInfoSector FatInfoSector;
+
+#include "fat.h"
+
+#define FAT32_INFO_MAGIC1 0x41615252
+#define FAT32_INFO_MAGIC2 0x61417272
+#define FAT32_INFO_MAGIC3 0xaa55
+
+/* stolen from mkdosfs, by Dave Hudson */
+
+#define FAT_BOOT_MESSAGE \
+"This partition does not have an operating system loader installed on it.\n\r"\
+"Press a key to reboot..."
+
+#define FAT_BOOT_JUMP "\xeb\x58\x90" /* jmp +5a */
+
+#define FAT_BOOT_CODE "\x0e" /* push cs */ \
+ "\x1f" /* pop ds */ \
+ "\xbe\x74\x7e" /* mov si, offset message */ \
+ /* write_msg_loop: */ \
+ "\xac" /* lodsb */ \
+ "\x22\xc0" /* and al, al */ \
+ "\x74\x06" /* jz done (+8) */ \
+ "\xb4\x0e" /* mov ah, 0x0e */ \
+ "\xcd\x10" /* int 0x10 */ \
+ "\xeb\xf5" /* jmp write_msg_loop */ \
+ /* done: */ \
+ "\xb4\x00" /* mov ah, 0x00 */ \
+ "\xcd\x16" /* int 0x16 */ \
+ "\xb4\x00" /* mov ah, 0x00 */ \
+ "\xcd\x19" /* int 0x19 */ \
+ "\xeb\xfe" /* jmp +0 - in case int 0x19 */ \
+ /* doesn't work */ \
+ /* message: */ \
+ FAT_BOOT_MESSAGE
+
+#define FAT_BOOT_CODE_LENGTH 128
+
+struct __attribute__ ((packed)) _FatBootSector {
+ uint8_t boot_jump[3]; /* 00: Boot strap short or near jump */
+ uint8_t system_id[8]; /* 03: system name */
+ uint16_t sector_size; /* 0b: bytes per logical sector */
+ uint8_t cluster_size; /* 0d: sectors/cluster */
+ uint16_t reserved; /* 0e: reserved sectors */
+ uint8_t fats; /* 10: number of FATs */
+ uint16_t dir_entries; /* 11: number of root directory entries */
+ uint16_t sectors; /* 13: if 0, total_sect supersedes */
+ uint8_t media; /* 15: media code */
+ uint16_t fat_length; /* 16: sectors/FAT for FAT12/16 */
+ uint16_t secs_track; /* 18: sectors per track */
+ uint16_t heads; /* 1a: number of heads */
+ uint32_t hidden; /* 1c: hidden sectors (partition start) */
+ uint32_t sector_count; /* 20: no. of sectors (if sectors == 0) */
+
+ union __attribute__ ((packed)) {
+ /* FAT16 fields */
+ struct __attribute__ ((packed)) {
+ uint8_t drive_num; /* 24: */
+ uint8_t empty_1; /* 25: */
+ uint8_t ext_signature; /* 26: always 0x29 */
+ uint32_t serial_number; /* 27: */
+ uint8_t volume_name [11]; /* 2b: */
+ uint8_t fat_name [8]; /* 36: */
+ uint8_t boot_code[448]; /* 3f: Boot code (or message) */
+ } fat16;
+ /* FAT32 fields */
+ struct __attribute__ ((packed)) {
+ uint32_t fat_length; /* 24: size of FAT in sectors */
+ uint16_t flags; /* 28: bit8: fat mirroring, low4: active fat */
+ uint16_t version; /* 2a: minor * 256 + major */
+ uint32_t root_dir_cluster; /* 2c: */
+ uint16_t info_sector; /* 30: */
+ uint16_t backup_sector; /* 32: */
+ uint8_t empty_1 [12]; /* 34: */
+ uint16_t drive_num; /* 40: */
+ uint8_t ext_signature; /* 42: always 0x29 */
+ uint32_t serial_number; /* 43: */
+ uint8_t volume_name [11]; /* 47: */
+ uint8_t fat_name [8]; /* 52: */
+ uint8_t boot_code[420]; /* 5a: Boot code (or message) */
+ } fat32;
+ } u;
+
+ uint16_t boot_sign; /* 1fe: always 0xAA55 */
+};
+
+struct __attribute__ ((packed)) _FatInfoSector {
+ uint32_t signature_1; /* should be 0x41615252 */
+ uint8_t unused [480];
+ uint32_t signature_2; /* should be 0x61417272 */
+ uint32_t free_clusters;
+ uint32_t next_cluster; /* most recently allocated cluster */
+ uint8_t unused2 [0xe];
+ uint16_t signature_3; /* should be 0xaa55 */
+};
+
+int fat_boot_sector_read (FatBootSector** bs, const PedGeometry* geom);
+FatType fat_boot_sector_probe_type (const FatBootSector* bs,
+ const PedGeometry* geom);
+int fat_boot_sector_analyse (FatBootSector* bs, PedFileSystem* fs);
+
+
+#endif /* PED_FAT_BOOTSECTOR_H */
diff --git a/libparted/fs/fat/count.h b/libparted/fs/fat/count.h
new file mode 100644
index 0000000..bb7d6af
--- /dev/null
+++ b/libparted/fs/fat/count.h
@@ -0,0 +1,46 @@
+/*
+ libparted
+ Copyright (C) 1999-2000, 2007-2014, 2019-2023 Free Software Foundation,
+ Inc.
+
+ 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 3 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. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef COUNT_H_INCLUDED
+#define COUNT_H_INCLUDED
+
+typedef enum _FatClusterFlag FatClusterFlag;
+typedef struct _FatClusterInfo FatClusterInfo;
+
+enum _FatClusterFlag {
+ FAT_FLAG_FREE=0,
+ FAT_FLAG_FILE=1,
+ FAT_FLAG_DIRECTORY=2,
+ FAT_FLAG_BAD=3
+};
+
+struct __attribute__ ((packed)) _FatClusterInfo {
+ unsigned int units_used:6; /* 1 unit = cluster_size / 64 */
+ FatClusterFlag flag:2;
+};
+
+extern int fat_collect_cluster_info (PedFileSystem *fs);
+extern FatClusterFlag fat_get_cluster_flag (PedFileSystem* fs,
+ FatCluster cluster);
+extern PedSector fat_get_cluster_usage (PedFileSystem* fs, FatCluster cluster);
+extern FatClusterFlag fat_get_fragment_flag (PedFileSystem* fs,
+ FatFragment frag);
+extern int fat_is_fragment_active (PedFileSystem* fs, FatFragment frag);
+
+#endif /* COUNT_H_INCLUDED */
diff --git a/libparted/fs/fat/fat.c b/libparted/fs/fat/fat.c
new file mode 100644
index 0000000..c04f178
--- /dev/null
+++ b/libparted/fs/fat/fat.c
@@ -0,0 +1,162 @@
+/*
+ libparted
+ Copyright (C) 1998-2001, 2007-2014, 2019-2023 Free Software Foundation,
+ Inc.
+
+ 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 3 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. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <config.h>
+#include <string.h>
+#include <uuid/uuid.h>
+
+#include "fat.h"
+
+PedFileSystem*
+fat_alloc (const PedGeometry* geom)
+{
+ PedFileSystem* fs;
+
+ fs = (PedFileSystem*) ped_malloc (sizeof (PedFileSystem));
+ if (!fs)
+ goto error;
+
+ fs->type_specific = (FatSpecific*) ped_malloc (sizeof (FatSpecific));
+ if (!fs->type_specific)
+ goto error_free_fs;
+ FatSpecific* fs_info = (FatSpecific*) fs->type_specific;
+ fs_info->boot_sector = NULL;
+ fs_info->info_sector = NULL;
+ fs->geom = ped_geometry_duplicate (geom);
+ if (!fs->geom)
+ goto error_free_type_specific;
+
+ fs->checked = 0;
+ return fs;
+
+error_free_type_specific:
+ free (fs->type_specific);
+error_free_fs:
+ free (fs);
+error:
+ return NULL;
+}
+
+void
+fat_free (PedFileSystem* fs)
+{
+ FatSpecific* fs_info = (FatSpecific*) fs->type_specific;
+ free (fs_info->boot_sector);
+ ped_geometry_destroy (fs->geom);
+ free (fs->type_specific);
+ free (fs);
+}
+
+PedGeometry*
+fat_probe (PedGeometry* geom, FatType* fat_type)
+{
+ PedFileSystem* fs;
+ FatSpecific* fs_info;
+ PedGeometry* result;
+
+ fs = fat_alloc (geom);
+ if (!fs)
+ goto error;
+ fs_info = (FatSpecific*) fs->type_specific;
+
+ if (!fat_boot_sector_read (&fs_info->boot_sector, geom))
+ goto error_free_fs;
+ if (!fat_boot_sector_analyse (fs_info->boot_sector, fs))
+ goto error_free_fs;
+
+ *fat_type = fs_info->fat_type;
+ result = ped_geometry_new (geom->dev, geom->start,
+ fs_info->sector_count);
+
+ fat_free (fs);
+ return result;
+
+error_free_fs:
+ fat_free (fs);
+error:
+ return NULL;
+}
+
+PedGeometry*
+fat_probe_fat16 (PedGeometry* geom)
+{
+ FatType fat_type;
+ PedGeometry* probed_geom = fat_probe (geom, &fat_type);
+
+ if (probed_geom) {
+ if (fat_type == FAT_TYPE_FAT16)
+ return probed_geom;
+ ped_geometry_destroy (probed_geom);
+ }
+ return NULL;
+}
+
+PedGeometry*
+fat_probe_fat32 (PedGeometry* geom)
+{
+ FatType fat_type;
+ PedGeometry* probed_geom = fat_probe (geom, &fat_type);
+
+ if (probed_geom) {
+ if (fat_type == FAT_TYPE_FAT32)
+ return probed_geom;
+ ped_geometry_destroy (probed_geom);
+ }
+ return NULL;
+}
+
+static PedFileSystemOps fat16_ops = {
+ probe: fat_probe_fat16,
+};
+
+static PedFileSystemOps fat32_ops = {
+ probe: fat_probe_fat32,
+};
+
+PedFileSystemType fat16_type = {
+ next: NULL,
+ ops: &fat16_ops,
+ name: "fat16",
+};
+
+PedFileSystemType fat32_type = {
+ next: NULL,
+ ops: &fat32_ops,
+ name: "fat32",
+};
+
+void
+ped_file_system_fat_init ()
+{
+ if (sizeof (FatBootSector) != 512) {
+ ped_exception_throw (PED_EXCEPTION_BUG, PED_EXCEPTION_CANCEL,
+ _("GNU Parted was miscompiled: the FAT boot sector "
+ "should be 512 bytes. FAT support will be disabled."));
+ } else {
+ ped_file_system_type_register (&fat16_type);
+ ped_file_system_type_register (&fat32_type);
+ }
+}
+
+void
+ped_file_system_fat_done ()
+{
+ ped_file_system_type_unregister (&fat16_type);
+ ped_file_system_type_unregister (&fat32_type);
+}
diff --git a/libparted/fs/fat/fat.h b/libparted/fs/fat/fat.h
new file mode 100644
index 0000000..f5302d9
--- /dev/null
+++ b/libparted/fs/fat/fat.h
@@ -0,0 +1,163 @@
+/*
+ libparted
+ Copyright (C) 1998-2001, 2007, 2009-2014, 2019-2023 Free Software
+ Foundation, Inc.
+
+ 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 3 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. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef FAT_H_INCLUDED
+#define FAT_H_INCLUDED
+
+#include <parted/parted.h>
+#include <parted/endian.h>
+#include <parted/debug.h>
+
+#if ENABLE_NLS
+# include <libintl.h>
+# define _(String) dgettext (PACKAGE, String)
+#else
+# define _(String) (String)
+#endif /* ENABLE_NLS */
+
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#define BUFFER_SIZE 1024 /* buffer size in sectors (512 bytes) */
+
+typedef uint32_t FatCluster;
+typedef int32_t FatFragment;
+
+enum _FatType {
+ FAT_TYPE_FAT12,
+ FAT_TYPE_FAT16,
+ FAT_TYPE_FAT32
+};
+typedef enum _FatType FatType;
+
+typedef struct _FatSpecific FatSpecific;
+typedef struct _FatDirEntry FatDirEntry;
+
+#include "bootsector.h"
+#include "count.h"
+
+struct _FatTable {
+ void* table;
+ FatCluster size;
+ int raw_size;
+
+ FatType fat_type;
+ FatCluster cluster_count;
+ FatCluster free_cluster_count;
+ FatCluster bad_cluster_count;
+
+ FatCluster last_alloc;
+};
+typedef struct _FatTable FatTable;
+
+struct __attribute__ ((packed)) _FatDirEntry {
+ char name[8];
+ uint8_t extension[3];
+ uint8_t attributes;
+ uint8_t is_upper_case_name;
+ uint8_t creation_time_low; /* milliseconds */
+ uint16_t creation_time_high;
+ uint16_t creation_date;
+ uint16_t access_date;
+ uint16_t first_cluster_high; /* for FAT32 */
+ uint16_t time;
+ uint16_t date;
+ uint16_t first_cluster;
+ uint32_t length;
+};
+
+struct _FatSpecific {
+ FatBootSector *boot_sector; /* structure of boot sector */
+ FatInfoSector *info_sector; /* fat32-only information sector */
+
+ int logical_sector_size; /* illogical sector size :-) */
+ PedSector sector_count;
+
+ int sectors_per_track; /* BIOS CHS stuff (S) */
+ int heads; /* BIOS CHS stuff (H) */
+
+ int cluster_size;
+ PedSector cluster_sectors;
+ FatCluster cluster_count;
+ int dir_entries_per_cluster;
+
+ FatType fat_type;
+ int fat_table_count;
+ PedSector fat_sectors;
+
+ uint32_t serial_number;
+
+ PedSector info_sector_offset; /* FAT32 only */
+ PedSector fat_offset;
+ PedSector root_dir_offset; /* non-FAT32 */
+ PedSector cluster_offset;
+ PedSector boot_sector_backup_offset;
+
+ FatCluster root_cluster; /* FAT32 only */
+ int root_dir_entry_count; /* non-FAT32 */
+ PedSector root_dir_sector_count; /* non-FAT32 */
+ FatCluster total_dir_clusters;
+
+ FatTable* fat;
+ FatClusterInfo* cluster_info;
+
+ PedSector buffer_sectors;
+ char* buffer;
+
+ int frag_size;
+ PedSector frag_sectors;
+ FatFragment frag_count;
+ FatFragment buffer_frags;
+ FatFragment cluster_frags;
+};
+
+#define FAT_SPECIFIC(fs) ((FatSpecific*) fs->type_specific)
+
+#define FAT_ROOT 0
+
+#define DELETED_FLAG 0xe5
+
+#define READONLY_ATTR 0x01
+#define HIDDEN_ATTR 0x02
+#define SYSTEM_ATTR 0x04
+#define VOLUME_LABEL_ATTR 0x08
+#define VFAT_ATTR 0x0f
+#define DIRECTORY_ATTR 0x10
+#define ARCH_ATTR 0x20
+
+#define MAX_FAT12_CLUSTERS 4086
+#define MAX_FAT16_CLUSTERS 65526
+#define MAX_FAT32_CLUSTERS 2000000
+
+#define FAT_ROOT_DIR_ENTRY_COUNT 512
+
+extern PedFileSystemType fat16_type;
+extern PedFileSystemType fat32_type;
+
+extern void fat_print (const PedFileSystem* fs);
+
+extern PedFileSystem* fat_alloc (const PedGeometry* geom);
+extern void fat_free (PedFileSystem* fs);
+extern int fat_alloc_buffers (PedFileSystem* fs);
+
+extern int fat_resize (PedFileSystem* fs, PedGeometry* geom, PedTimer* timer);
+
+#endif /* FAT_H_INCLUDED */
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