--- old/usr/src/lib/libparted/common/libparted/fs/fat/resize.c 2014-07-17 16:13:50.329932255 +0200
+++ /dev/null 2014-07-17 16:13:50.000000000 +0200
@@ -1,877 +0,0 @@
-/*
- libparted
- Copyright (C) 1998, 1999, 2000, 2007 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 .
-*/
-
-#include
-#include "fat.h"
-#include "traverse.h"
-#include "count.h"
-#include "fatio.h"
-#include "calc.h"
-
-#include
-#include
-#include
-#include
-#include
-#include
-#include
-#include
-#include
-
-#ifndef DISCOVER_ONLY
-
-/* Recursively builds (i.e. makes consistent) the duplicated directory tree
- * (leaving the original directory tree in tact)
- */
-static int
-fat_construct_directory (FatOpContext* ctx, FatTraverseInfo* trav_info)
-{
- FatTraverseInfo* sub_dir_info;
- FatDirEntry* dir_entry;
- FatCluster old_first_cluster;
-
- while ( (dir_entry = fat_traverse_next_dir_entry (trav_info)) ) {
- if (fat_dir_entry_is_null_term (dir_entry))
- break;
- if (!fat_dir_entry_has_first_cluster (dir_entry, ctx->old_fs))
- continue;
-
- fat_traverse_mark_dirty (trav_info);
-
- old_first_cluster = fat_dir_entry_get_first_cluster (dir_entry,
- ctx->old_fs);
- fat_dir_entry_set_first_cluster (dir_entry, ctx->new_fs,
- fat_op_context_map_cluster (ctx, old_first_cluster));
-
- if (fat_dir_entry_is_directory (dir_entry)
- && dir_entry->name [0] != '.') {
- sub_dir_info
- = fat_traverse_directory (trav_info, dir_entry);
- if (!sub_dir_info)
- return 0;
- if (!fat_construct_directory (ctx, sub_dir_info))
- return 0;
- }
- }
- /* remove "stale" entries at the end */
- while ((dir_entry = fat_traverse_next_dir_entry (trav_info))) {
- memset (dir_entry, 0, sizeof (FatDirEntry));
- fat_traverse_mark_dirty (trav_info);
- }
- fat_traverse_complete (trav_info);
- return 1;
-}
-
-static int
-duplicate_legacy_root_dir (FatOpContext* ctx)
-{
- FatSpecific* old_fs_info = FAT_SPECIFIC (ctx->old_fs);
- FatSpecific* new_fs_info = FAT_SPECIFIC (ctx->new_fs);
-
- PED_ASSERT (old_fs_info->root_dir_sector_count
- == new_fs_info->root_dir_sector_count, return 0);
-
- if (!ped_geometry_read (ctx->old_fs->geom, old_fs_info->buffer,
- old_fs_info->root_dir_offset,
- old_fs_info->root_dir_sector_count))
- return 0;
-
- if (!ped_geometry_write (ctx->new_fs->geom, old_fs_info->buffer,
- new_fs_info->root_dir_offset,
- new_fs_info->root_dir_sector_count))
- return 0;
-
- return 1;
-}
-
-/*
- Constructs the new directory tree for legacy (FAT16) file systems.
-*/
-static int
-fat_construct_legacy_root (FatOpContext* ctx)
-{
- FatTraverseInfo* trav_info;
-
- if (!duplicate_legacy_root_dir (ctx))
- return 0;
- trav_info = fat_traverse_begin (ctx->new_fs, FAT_ROOT, "\\");
- return fat_construct_directory (ctx, trav_info);
-}
-
-/*
- Constructs the new directory tree for new (FAT32) file systems.
-*/
-static int
-fat_construct_root (FatOpContext* ctx)
-{
- FatSpecific* new_fs_info = FAT_SPECIFIC (ctx->new_fs);
- FatTraverseInfo* trav_info;
-
- trav_info = fat_traverse_begin (ctx->new_fs, new_fs_info->root_cluster,
- "\\");
- fat_construct_directory (ctx, trav_info);
- return 1;
-}
-
-/* Converts the root directory between FAT16 and FAT32. NOTE: this code
- * can also do no conversion. I'm leaving fat_construct_directory(), because
- * it's really pretty :-) It also leaves a higher chance of deleted file
- * recovery, because it doesn't remove redundant entries. (We do this here,
- * because brain-damaged FAT16 has an arbitary limit on root directory entries,
- * so we save room)
- */
-static int
-fat_convert_directory (FatOpContext* ctx, FatTraverseInfo* old_trav,
- FatTraverseInfo* new_trav)
-{
- FatTraverseInfo* sub_old_dir_trav;
- FatTraverseInfo* sub_new_dir_trav;
- FatDirEntry* new_dir_entry;
- FatDirEntry* old_dir_entry;
- FatCluster old_first_cluster;
-
- while ( (old_dir_entry = fat_traverse_next_dir_entry (old_trav)) ) {
- if (fat_dir_entry_is_null_term (old_dir_entry))
- break;
- if (!fat_dir_entry_is_active (old_dir_entry))
- continue;
-
- new_dir_entry = fat_traverse_next_dir_entry (new_trav);
- if (!new_dir_entry) {
- return ped_exception_throw (PED_EXCEPTION_ERROR,
- PED_EXCEPTION_IGNORE_CANCEL,
- _("There's not enough room in the root "
- "directory for all of the files. Either "
- "cancel, or ignore to lose the files."))
- == PED_EXCEPTION_IGNORE;
- }
-
- *new_dir_entry = *old_dir_entry;
- fat_traverse_mark_dirty (new_trav);
-
- if (!fat_dir_entry_has_first_cluster (old_dir_entry,
- ctx->old_fs))
- continue;
-
- old_first_cluster = fat_dir_entry_get_first_cluster (
- old_dir_entry, ctx->old_fs);
- fat_dir_entry_set_first_cluster (new_dir_entry, ctx->new_fs,
- fat_op_context_map_cluster (ctx, old_first_cluster));
-
- if (fat_dir_entry_is_directory (old_dir_entry)
- && old_dir_entry->name [0] != '.') {
- sub_old_dir_trav
- = fat_traverse_directory (old_trav, old_dir_entry);
- sub_new_dir_trav
- = fat_traverse_directory (new_trav, new_dir_entry);
- if (!sub_old_dir_trav || !sub_new_dir_trav)
- return 0;
-
- if (!fat_convert_directory (ctx, sub_old_dir_trav,
- sub_new_dir_trav))
- return 0;
- }
- }
-
- /* remove "stale" entries at the end, just in case there is some
- * overlap
- */
- while ((new_dir_entry = fat_traverse_next_dir_entry (new_trav))) {
- memset (new_dir_entry, 0, sizeof (FatDirEntry));
- fat_traverse_mark_dirty (new_trav);
- }
-
- fat_traverse_complete (old_trav);
- fat_traverse_complete (new_trav);
- return 1;
-}
-
-static void
-clear_cluster (PedFileSystem* fs, FatCluster cluster)
-{
- FatSpecific* fs_info = FAT_SPECIFIC (fs);
-
- memset (fs_info->buffer, 0, fs_info->cluster_size);
- fat_write_cluster (fs, fs_info->buffer, cluster);
-}
-
-/* This MUST be called BEFORE the fat_construct_new_fat(), because cluster
- * allocation depend on the old FAT. The reason is, old clusters may
- * still be needed during the resize, (particularly clusters in the directory
- * tree) even if they will be discarded later.
- */
-static int
-alloc_root_dir (FatOpContext* ctx)
-{
- FatSpecific* old_fs_info = FAT_SPECIFIC (ctx->old_fs);
- FatSpecific* new_fs_info = FAT_SPECIFIC (ctx->new_fs);
- FatCluster i;
- FatCluster cluster;
- FatCluster cluster_count;
-
- PED_ASSERT (new_fs_info->fat_type == FAT_TYPE_FAT32, return 0);
-
- cluster_count = ped_div_round_up (
- PED_MAX (16, old_fs_info->root_dir_sector_count),
- new_fs_info->cluster_sectors);
-
- for (i = 0; i < cluster_count; i++) {
- cluster = fat_table_alloc_check_cluster (new_fs_info->fat,
- ctx->new_fs);
- if (!cluster)
- return 0;
- ctx->new_root_dir [i] = cluster;
- clear_cluster (ctx->new_fs, cluster);
- }
- ctx->new_root_dir [i] = 0;
- new_fs_info->root_cluster = ctx->new_root_dir [0];
- return 1;
-}
-
-/* when converting FAT32 -> FAT16
- * fat_duplicate clusters() duplicated the root directory unnecessarily.
- * Let's free it.
- *
- * This must be called AFTER fat_construct_new_fat(). (otherwise, our
- * changes just get overwritten)
- */
-static int
-free_root_dir (FatOpContext* ctx)
-{
- FatSpecific* old_fs_info = FAT_SPECIFIC (ctx->old_fs);
- FatSpecific* new_fs_info = FAT_SPECIFIC (ctx->new_fs);
- FatCluster old_cluster;
- FatFragment i;
-
- PED_ASSERT (old_fs_info->fat_type == FAT_TYPE_FAT32, return 0);
- PED_ASSERT (new_fs_info->fat_type == FAT_TYPE_FAT16, return 0);
-
- for (old_cluster = old_fs_info->root_cluster;
- !fat_table_is_eof (old_fs_info->fat, old_cluster);
- old_cluster = fat_table_get (old_fs_info->fat, old_cluster)) {
- FatFragment old_frag;
- old_frag = fat_cluster_to_frag (ctx->old_fs, old_cluster);
- for (i = 0; i < new_fs_info->cluster_frags; i++) {
- FatFragment new_frag;
- FatCluster new_clst;
- new_frag = fat_op_context_map_fragment (ctx,
- old_frag + i);
- new_clst = fat_frag_to_cluster (ctx->old_fs, new_frag);
- if (!fat_table_set_avail (new_fs_info->fat, new_clst))
- return 0;
- }
- }
-
- return 1;
-}
-
-static int
-fat_clear_root_dir (PedFileSystem* fs)
-{
- FatSpecific* fs_info = FAT_SPECIFIC (fs);
- int i;
-
- PED_ASSERT (fs_info->fat_type == FAT_TYPE_FAT16, return 0);
- PED_ASSERT (fs_info->root_dir_sector_count, return 0);
-
- memset (fs_info->buffer, 0, 512);
-
- for (i = 0; i < fs_info->root_dir_sector_count; i++) {
- if (!ped_geometry_write (fs->geom, fs_info->buffer,
- fs_info->root_dir_offset + i, 1)) {
- if (ped_exception_throw (PED_EXCEPTION_ERROR,
- PED_EXCEPTION_IGNORE_CANCEL,
- _("Error writing to the root directory."))
- == PED_EXCEPTION_CANCEL)
- return 0;
- }
- }
- return 1;
-}
-
-static int
-fat_construct_converted_tree (FatOpContext* ctx)
-{
- FatSpecific* old_fs_info = FAT_SPECIFIC (ctx->old_fs);
- FatSpecific* new_fs_info = FAT_SPECIFIC (ctx->new_fs);
- FatTraverseInfo* old_trav_info;
- FatTraverseInfo* new_trav_info;
-
- if (new_fs_info->fat_type == FAT_TYPE_FAT32) {
- new_trav_info = fat_traverse_begin (ctx->new_fs,
- new_fs_info->root_cluster, "\\");
- old_trav_info = fat_traverse_begin (ctx->old_fs, FAT_ROOT,
- "\\");
- } else {
- fat_clear_root_dir (ctx->new_fs);
- new_trav_info = fat_traverse_begin (ctx->new_fs, FAT_ROOT,
- "\\");
- old_trav_info = fat_traverse_begin (ctx->old_fs,
- old_fs_info->root_cluster, "\\");
- }
- if (!new_trav_info || !old_trav_info)
- return 0;
- if (!fat_convert_directory (ctx, old_trav_info, new_trav_info))
- return 0;
- return 1;
-}
-
-/*
- Constructs the new directory tree to match the new file locations.
-*/
-static int
-fat_construct_dir_tree (FatOpContext* ctx)
-{
- FatSpecific* new_fs_info = FAT_SPECIFIC (ctx->new_fs);
- FatSpecific* old_fs_info = FAT_SPECIFIC (ctx->old_fs);
-
- if (new_fs_info->fat_type == old_fs_info->fat_type) {
- switch (old_fs_info->fat_type) {
- case FAT_TYPE_FAT12:
- PED_ASSERT (0, (void) 0);
- break;
-
- case FAT_TYPE_FAT16:
- return fat_construct_legacy_root (ctx);
-
- case FAT_TYPE_FAT32:
- return fat_construct_root (ctx);
- }
- } else {
- return fat_construct_converted_tree (ctx);
- }
-
- return 0;
-}
-
-static FatFragment
-_get_next_old_frag (FatOpContext* ctx, FatFragment frag)
-{
- FatSpecific* old_fs_info = FAT_SPECIFIC (ctx->old_fs);
- FatCluster cluster;
- FatCluster next_cluster;
-
- if ((frag + 1) % old_fs_info->cluster_frags != 0) {
- if (fat_is_fragment_active (ctx->old_fs, frag + 1))
- return frag + 1;
- else
- return -1;
- } else {
- cluster = fat_frag_to_cluster (ctx->old_fs, frag);
- next_cluster = fat_table_get (old_fs_info->fat, cluster);
-
- if (fat_table_is_eof (old_fs_info->fat, next_cluster))
- return -1;
- else
- return fat_cluster_to_frag (ctx->old_fs, next_cluster);
- }
-}
-
-/*
- Constructs the new fat for the resized file system.
-*/
-static int
-fat_construct_new_fat (FatOpContext* ctx)
-{
- FatSpecific* old_fs_info = FAT_SPECIFIC (ctx->old_fs);
- FatSpecific* new_fs_info = FAT_SPECIFIC (ctx->new_fs);
- FatFragment old_frag;
- FatCluster new_cluster;
- FatFragment new_frag;
- FatFragment old_next_frag;
- FatFragment new_next_frag;
- FatCluster new_next_cluster;
- FatClusterFlag flag;
- int i;
-
- fat_table_clear (new_fs_info->fat);
- if (!fat_table_set_cluster_count (new_fs_info->fat,
- new_fs_info->cluster_count))
- return 0;
-
- for (old_frag = 0; old_frag < old_fs_info->frag_count; old_frag++) {
- flag = fat_get_fragment_flag (ctx->old_fs, old_frag);
- if (flag == FAT_FLAG_FREE)
- continue;
- if (flag == FAT_FLAG_BAD) {
- new_frag = fat_op_context_map_static_fragment (
- ctx, old_frag);
- if (new_frag == -1)
- continue;
- new_cluster = fat_frag_to_cluster (ctx->new_fs,
- new_frag);
- fat_table_set_bad (new_fs_info->fat, new_cluster);
- continue;
- }
-
- new_frag = fat_op_context_map_fragment (ctx, old_frag);
- new_cluster = fat_frag_to_cluster (ctx->new_fs, new_frag);
-
- old_next_frag = _get_next_old_frag (ctx, old_frag);
- if (old_next_frag == -1) {
- fat_table_set_eof (new_fs_info->fat, new_cluster);
- continue;
- }
-
- new_next_frag = fat_op_context_map_fragment (ctx,
- old_next_frag);
- PED_ASSERT (new_next_frag != -1, return 0);
-
- new_next_cluster = fat_frag_to_cluster (ctx->new_fs,
- new_next_frag);
- PED_ASSERT (new_next_cluster != new_cluster, return 0);
-
- fat_table_set (new_fs_info->fat, new_cluster, new_next_cluster);
- }
-
-#if 0
-#ifdef PED_VERBOSE
- for (old_cluster=2; old_cluster < old_fs_info->cluster_count+2;
- old_cluster++) {
- if (fat_table_is_available (old_fs_info->fat, old_cluster))
- continue;
-
- printf ("%d->%d\t(next: %d->%d)\n",
- old_cluster,
- ctx->remap [old_cluster],
- fat_table_get (old_fs_info->fat, old_cluster),
- fat_table_get (new_fs_info->fat,
- ctx->remap [old_cluster]));
- }
-#endif /* PED_VERBOSE */
-#endif
-
- if (old_fs_info->fat_type == FAT_TYPE_FAT32
- && new_fs_info->fat_type == FAT_TYPE_FAT32) {
- new_fs_info->root_cluster
- = fat_op_context_map_cluster (ctx,
- old_fs_info->root_cluster);
- }
-
- if (old_fs_info->fat_type == FAT_TYPE_FAT16
- && new_fs_info->fat_type == FAT_TYPE_FAT32) {
- for (i=0; ctx->new_root_dir[i+1]; i++) {
- fat_table_set (new_fs_info->fat,
- ctx->new_root_dir[i],
- ctx->new_root_dir[i+1]);
- }
- fat_table_set_eof (new_fs_info->fat, ctx->new_root_dir[i]);
- }
-
- return 1;
-}
-
-static int
-ask_type (PedFileSystem* fs, int fat16_ok, int fat32_ok, FatType* out_fat_type)
-{
- FatSpecific* fs_info = FAT_SPECIFIC (fs);
- PedExceptionOption status;
- char* fat16_msg;
- char* fat32_msg;
-
- if (fs_info->fat_type == FAT_TYPE_FAT16)
- fat16_msg = _("If you leave your file system as FAT16, "
- "then you will have no problems.");
- else
- fat16_msg = _("If you convert to FAT16, and MS Windows "
- "is installed on this partition, then "
- "you must re-install the MS Windows boot "
- "loader. If you want to do this, you "
- "should consult the Parted manual (or "
- "your distribution's manual).");
-
- if (fs_info->fat_type == FAT_TYPE_FAT32)
- fat32_msg = _("If you leave your file system as FAT32, "
- "then you will not introduce any new "
- "problems.");
- else
- fat32_msg = _("If you convert to FAT32, and MS Windows "
- "is installed on this partition, then "
- "you must re-install the MS Windows boot "
- "loader. If you want to do this, you "
- "should consult the Parted manual (or "
- "your distribution's manual). Also, "
- "converting to FAT32 will make the file "
- "system unreadable by MS DOS, MS Windows "
- "95a, and MS Windows NT.");
-
- if (fat16_ok && fat32_ok) {
- status = ped_exception_throw (
- PED_EXCEPTION_INFORMATION,
- PED_EXCEPTION_YES_NO_CANCEL,
- _("%s %s %s"),
- _("Would you like to use FAT32?"),
- fat16_msg,
- fat32_msg);
-
- switch (status) {
- case PED_EXCEPTION_YES:
- *out_fat_type = FAT_TYPE_FAT32;
- return 1;
-
- case PED_EXCEPTION_NO:
- *out_fat_type = FAT_TYPE_FAT16;
- return 1;
-
- case PED_EXCEPTION_UNHANDLED:
- *out_fat_type = fs_info->fat_type;
- return 1;
-
- case PED_EXCEPTION_CANCEL:
- return 0;
-
- default:
- PED_ASSERT (0, (void) 0);
- break;
- }
- }
-
- if (fat16_ok) {
- if (fs_info->fat_type != FAT_TYPE_FAT16) {
- status = ped_exception_throw (
- PED_EXCEPTION_WARNING,
- PED_EXCEPTION_OK_CANCEL,
- _("%s %s"),
- _("The file system can only be resized to this "
- "size by converting to FAT16."),
- fat16_msg);
- if (status == PED_EXCEPTION_CANCEL)
- return 0;
- }
- *out_fat_type = FAT_TYPE_FAT16;
- return 1;
- }
-
- if (fat32_ok) {
- if (fs_info->fat_type != FAT_TYPE_FAT32) {
- status = ped_exception_throw (
- PED_EXCEPTION_WARNING,
- PED_EXCEPTION_OK_CANCEL,
- _("%s %s"),
- _("The file system can only be resized to this "
- "size by converting to FAT32."),
- fat32_msg);
- if (status == PED_EXCEPTION_CANCEL)
- return 0;
- }
- *out_fat_type = FAT_TYPE_FAT32;
- return 1;
- }
-
- ped_exception_throw (
- PED_EXCEPTION_NO_FEATURE,
- PED_EXCEPTION_CANCEL,
- _("GNU Parted cannot resize this partition to this size. "
- "We're working on it!"));
-
- return 0;
-}
-
-/* For resize operations: determine if the file system must be FAT16 or FAT32,
- * or either. If the new file system must be FAT32, then query for
- * confirmation. If either file system can be used, query for which one.
- */
-static int
-get_fat_type (PedFileSystem* fs, const PedGeometry* new_geom,
- FatType* out_fat_type)
-{
- FatSpecific* fs_info = FAT_SPECIFIC (fs);
- PedSector fat16_cluster_sectors;
- PedSector fat32_cluster_sectors;
- FatCluster dummy_cluster_count;
- PedSector dummy_fat_sectors;
- int fat16_ok;
- int fat32_ok;
-
- fat16_ok = fat_calc_resize_sizes (
- new_geom,
- fs_info->cluster_sectors,
- FAT_TYPE_FAT16,
- fs_info->root_dir_sector_count,
- fs_info->cluster_sectors,
- &fat16_cluster_sectors,
- &dummy_cluster_count,
- &dummy_fat_sectors);
-
- fat32_ok = fat_calc_resize_sizes (
- new_geom,
- fs_info->cluster_sectors,
- FAT_TYPE_FAT32,
- fs_info->root_dir_sector_count,
- fs_info->cluster_sectors,
- &fat32_cluster_sectors,
- &dummy_cluster_count,
- &dummy_fat_sectors);
-
- return ask_type (fs, fat16_ok, fat32_ok, out_fat_type);
-}
-
-/* Creates the PedFileSystem struct for the new resized file system, and
- sticks it in a FatOpContext. At the end of the process, the original
- (ctx->old_fs) is destroyed, and replaced with the new one (ctx->new_fs).
- */
-static FatOpContext*
-create_resize_context (PedFileSystem* fs, const PedGeometry* new_geom)
-{
- FatSpecific* fs_info = FAT_SPECIFIC (fs);
- FatSpecific* new_fs_info;
- PedFileSystem* new_fs;
- PedSector new_cluster_sectors;
- FatCluster new_cluster_count;
- PedSector new_fat_sectors;
- FatType new_fat_type;
- PedSector root_dir_sector_count;
- FatOpContext* context;
-
- /* hypothetical number of root dir sectors, if we end up using
- * FAT16
- */
- if (fs_info->root_dir_sector_count)
- root_dir_sector_count = fs_info->root_dir_sector_count;
- else
- root_dir_sector_count = FAT_ROOT_DIR_ENTRY_COUNT
- * sizeof (FatDirEntry) / 512;
-
- if (!get_fat_type (fs, new_geom, &new_fat_type))
- return 0;
-
- fat_calc_resize_sizes (new_geom, fs_info->cluster_sectors, new_fat_type,
- root_dir_sector_count, fs_info->cluster_sectors,
- &new_cluster_sectors, &new_cluster_count, &new_fat_sectors);
-
- if (!fat_check_resize_geometry (fs, new_geom, new_cluster_sectors,
- new_cluster_count))
- goto error;
-
- new_fs = fat_alloc (new_geom);
- if (!new_fs)
- goto error;
-
- new_fs_info = FAT_SPECIFIC (new_fs);
- if (!new_fs_info)
- goto error_free_new_fs;
-
-/* preserve boot code, etc. */
- memcpy (&new_fs_info->boot_sector, &fs_info->boot_sector,
- sizeof (FatBootSector));
- memcpy (&new_fs_info->info_sector, &fs_info->info_sector,
- sizeof (FatInfoSector));
-
- new_fs_info->logical_sector_size = fs_info->logical_sector_size;
- new_fs_info->sector_count = new_geom->length;
-
- new_fs_info->sectors_per_track = fs_info->sectors_per_track;
- new_fs_info->heads = fs_info->heads;
-
- new_fs_info->cluster_size = new_cluster_sectors * 512;
- new_fs_info->cluster_sectors = new_cluster_sectors;
- new_fs_info->cluster_count = new_cluster_count;
- new_fs_info->dir_entries_per_cluster = fs_info->dir_entries_per_cluster;
-
- new_fs_info->fat_type = new_fat_type;
- new_fs_info->fat_table_count = 2;
- new_fs_info->fat_sectors = new_fat_sectors;
-
- /* what about copying? */
- new_fs_info->serial_number = fs_info->serial_number;
-
- if (new_fs_info->fat_type == FAT_TYPE_FAT32) {
- new_fs_info->info_sector_offset = 1;
- new_fs_info->boot_sector_backup_offset = 6;
-
- new_fs_info->root_dir_offset = 0;
- new_fs_info->root_dir_entry_count = 0;
- new_fs_info->root_dir_sector_count = 0;
-
- /* we add calc_align_sectors to push the cluster_offset
- forward, to keep the clusters aligned between the new
- and old file systems
- */
- new_fs_info->fat_offset
- = fat_min_reserved_sector_count (FAT_TYPE_FAT32)
- + fat_calc_align_sectors (new_fs, fs);
-
- new_fs_info->cluster_offset
- = new_fs_info->fat_offset
- + 2 * new_fs_info->fat_sectors;
- } else {
- new_fs_info->root_dir_sector_count = root_dir_sector_count;
- new_fs_info->root_dir_entry_count
- = root_dir_sector_count * 512 / sizeof (FatDirEntry);
-
- new_fs_info->fat_offset
- = fat_min_reserved_sector_count (FAT_TYPE_FAT16)
- + fat_calc_align_sectors (new_fs, fs);
-
- new_fs_info->root_dir_offset = new_fs_info->fat_offset
- + 2 * new_fs_info->fat_sectors;
-
- new_fs_info->cluster_offset = new_fs_info->root_dir_offset
- + new_fs_info->root_dir_sector_count;
- }
-
- new_fs_info->total_dir_clusters = fs_info->total_dir_clusters;
-
- context = fat_op_context_new (new_fs, fs);
- if (!context)
- goto error_free_new_fs_info;
-
- if (!fat_op_context_create_initial_fat (context))
- goto error_free_context;
-
- if (!fat_alloc_buffers (new_fs))
- goto error_free_fat;
-
- return context;
-
-error_free_fat:
- fat_table_destroy (new_fs_info->fat);
-error_free_context:
- ped_free (context);
-error_free_new_fs_info:
- ped_free (new_fs_info);
-error_free_new_fs:
- ped_free (new_fs);
-error:
- return NULL;
-}
-
-static int
-resize_context_assimilate (FatOpContext* ctx)
-{
- FatSpecific* old_fs_info = FAT_SPECIFIC (ctx->old_fs);
- FatSpecific* new_fs_info = FAT_SPECIFIC (ctx->new_fs);
-
- fat_free_buffers (ctx->old_fs);
- fat_table_destroy (old_fs_info->fat);
- ped_free (old_fs_info);
- ped_geometry_destroy (ctx->old_fs->geom);
-
- ctx->old_fs->type_specific = ctx->new_fs->type_specific;
- ctx->old_fs->geom = ctx->new_fs->geom;
- ctx->old_fs->type = (new_fs_info->fat_type == FAT_TYPE_FAT16)
- ? &fat16_type
- : &fat32_type;
-
- ped_free (ctx->new_fs);
-
- fat_op_context_destroy (ctx);
-
- return 1;
-}
-
-static int
-resize_context_abort (FatOpContext* ctx)
-{
- FatSpecific* new_fs_info = FAT_SPECIFIC (ctx->new_fs);
-
- fat_free_buffers (ctx->new_fs);
- fat_table_destroy (new_fs_info->fat);
- ped_free (new_fs_info);
- ped_geometry_destroy (ctx->new_fs->geom);
- ped_free (ctx->new_fs);
-
- fat_op_context_destroy (ctx);
-
- return 1;
-}
-
-/* copies the "hidden" sectors, between the boot sector and the FAT. Required,
- * for the Windows 98 FAT32 boot loader
- */
-int
-_copy_hidden_sectors (FatOpContext* ctx)
-{
- FatSpecific* old_fs_info = FAT_SPECIFIC (ctx->old_fs);
- FatSpecific* new_fs_info = FAT_SPECIFIC (ctx->new_fs);
- PedSector first = 1;
- PedSector last;
- PedSector count;
-
- /* nothing to copy for FAT16 */
- if (old_fs_info->fat_type == FAT_TYPE_FAT16
- || new_fs_info->fat_type == FAT_TYPE_FAT16)
- return 1;
-
- last = PED_MIN (old_fs_info->fat_offset, new_fs_info->fat_offset) - 1;
- count = last - first + 1;
-
- PED_ASSERT (count < BUFFER_SIZE, return 0);
-
- if (!ped_geometry_read (ctx->old_fs->geom, old_fs_info->buffer,
- first, count))
- return 0;
- if (!ped_geometry_write (ctx->new_fs->geom, old_fs_info->buffer,
- first, count))
- return 0;
- return 1;
-}
-
-int
-fat_resize (PedFileSystem* fs, PedGeometry* geom, PedTimer* timer)
-{
- FatSpecific* fs_info = FAT_SPECIFIC (fs);
- FatSpecific* new_fs_info;
- FatOpContext* ctx;
- PedFileSystem* new_fs;
-
- ctx = create_resize_context (fs, geom);
- if (!ctx)
- goto error;
- new_fs = ctx->new_fs;
- new_fs_info = FAT_SPECIFIC (new_fs);
-
- if (!fat_duplicate_clusters (ctx, timer))
- goto error_abort_ctx;
- if (fs_info->fat_type == FAT_TYPE_FAT16
- && new_fs_info->fat_type == FAT_TYPE_FAT32) {
- if (!alloc_root_dir (ctx))
- goto error_abort_ctx;
- }
- if (!fat_construct_new_fat (ctx))
- goto error_abort_ctx;
- if (fs_info->fat_type == FAT_TYPE_FAT32
- && new_fs_info->fat_type == FAT_TYPE_FAT16) {
- if (!free_root_dir (ctx))
- goto error_abort_ctx;
- }
- if (!fat_construct_dir_tree (ctx))
- goto error_abort_ctx;
- if (!fat_table_write_all (new_fs_info->fat, new_fs))
- goto error_abort_ctx;
-
- _copy_hidden_sectors (ctx);
- fat_boot_sector_generate (&new_fs_info->boot_sector, new_fs);
- fat_boot_sector_write (&new_fs_info->boot_sector, new_fs);
- if (new_fs_info->fat_type == FAT_TYPE_FAT32) {
- fat_info_sector_generate (&new_fs_info->info_sector, new_fs);
- fat_info_sector_write (&new_fs_info->info_sector, new_fs);
- }
-
- if (!resize_context_assimilate (ctx))
- goto error;
-
- return 1;
-
-error_abort_ctx:
- resize_context_abort (ctx);
-error:
- return 0;
-}
-
-#endif /* !DISCOVER_ONLY */