--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2021 Namjae Jeon <linkinjeon@kernel.org>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <errno.h>
+#include <locale.h>
+#include <inttypes.h>
+
+#include "exfat_ondisk.h"
+#include "libexfat.h"
+
+#define EXFAT_MIN_SECT_SIZE_BITS 9
+#define EXFAT_MAX_SECT_SIZE_BITS 12
+#define BITS_PER_BYTE 8
+#define BITS_PER_BYTE_MASK 0x7
+
+static const unsigned char used_bit[] = {
+ 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4, 1, 2, 2, 3,/* 0 ~ 19*/
+ 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, 1, 2, 2, 3, 2, 3, 3, 4,/* 20 ~ 39*/
+ 2, 3, 3, 4, 3, 4, 4, 5, 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5,/* 40 ~ 59*/
+ 4, 5, 5, 6, 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,/* 60 ~ 79*/
+ 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 2, 3, 3, 4,/* 80 ~ 99*/
+ 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 3, 4, 4, 5, 4, 5, 5, 6,/*100 ~ 119*/
+ 4, 5, 5, 6, 5, 6, 6, 7, 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4,/*120 ~ 139*/
+ 3, 4, 4, 5, 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,/*140 ~ 159*/
+ 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 3, 4, 4, 5,/*160 ~ 179*/
+ 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, 2, 3, 3, 4, 3, 4, 4, 5,/*180 ~ 199*/
+ 3, 4, 4, 5, 4, 5, 5, 6, 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6,/*200 ~ 219*/
+ 5, 6, 6, 7, 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,/*220 ~ 239*/
+ 4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8 /*240 ~ 255*/
+};
+
+static void usage(void)
+{
+ fprintf(stderr, "Usage: dump.exfat\n");
+ fprintf(stderr, "\t-V | --version Show version\n");
+ fprintf(stderr, "\t-h | --help Show help\n");
+
+ exit(EXIT_FAILURE);
+}
+
+static struct option opts[] = {
+ {"version", no_argument, NULL, 'V' },
+ {"help", no_argument, NULL, 'h' },
+ {"?", no_argument, NULL, '?' },
+ {NULL, 0, NULL, 0 }
+};
+
+static unsigned int exfat_count_used_clusters(unsigned char *bitmap,
+ unsigned long long bitmap_len)
+{
+ unsigned int count = 0;
+ unsigned long long i;
+
+ for (i = 0; i < bitmap_len; i++)
+ count += used_bit[bitmap[i]];
+
+ return count;
+}
+
+int exfat_show_ondisk_all_info(struct exfat_blk_dev *bd)
+{
+ struct pbr *ppbr;
+ struct bsx64 *pbsx;
+ struct exfat_dentry *ed;
+ unsigned int root_clu_off, bitmap_clu_off, bitmap_clu;
+ unsigned int total_clus, used_clus, clu_offset, root_clu;
+ unsigned long long bitmap_len;
+ int ret;
+ unsigned char *bitmap;
+ char *volume_label;
+
+ ppbr = malloc(bd->sector_size);
+ if (!ppbr) {
+ exfat_err("Cannot allocate pbr: out of memory\n");
+ return -1;
+ }
+
+ /* read main boot sector */
+ ret = exfat_read_sector(bd, (char *)ppbr, BOOT_SEC_IDX);
+ if (ret < 0) {
+ exfat_err("main boot sector read failed\n");
+ ret = -1;
+ goto free_ppbr;
+ }
+
+ pbsx = &ppbr->bsx;
+
+ if (pbsx->sect_size_bits < EXFAT_MIN_SECT_SIZE_BITS ||
+ pbsx->sect_size_bits > EXFAT_MAX_SECT_SIZE_BITS) {
+ exfat_err("bogus sector size bits : %u\n",
+ pbsx->sect_size_bits);
+ return -EINVAL;
+ }
+
+ if (pbsx->sect_per_clus_bits > 25 - pbsx->sect_size_bits) {
+ exfat_err("bogus sectors bits per cluster : %u\n",
+ pbsx->sect_per_clus_bits);
+ return -EINVAL;
+ }
+
+ if (bd->sector_size != 1 << pbsx->sect_size_bits) {
+ exfat_err("bogus sectors size : %u(sector size bits : %u)\n",
+ bd->sector_size, pbsx->sect_size_bits);
+
+ }
+
+ clu_offset = le32_to_cpu(pbsx->clu_offset);
+ total_clus = le32_to_cpu(pbsx->clu_count);
+ root_clu = le32_to_cpu(pbsx->root_cluster);
+
+ exfat_info("-------------- Dump Boot sector region --------------\n");
+ exfat_info("Volume Length(sectors): \t\t%" PRIu64 "\n",
+ le64_to_cpu(pbsx->vol_length));
+ exfat_info("FAT Offset(sector offset): \t\t%u\n",
+ le32_to_cpu(pbsx->fat_offset));
+ exfat_info("FAT Length(sectors): \t\t\t%u\n",
+ le32_to_cpu(pbsx->fat_length));
+ exfat_info("Cluster Heap Offset (sector offset): \t%u\n", clu_offset);
+ exfat_info("Cluster Count: \t\t\t\t%u\n", total_clus);
+ exfat_info("Root Cluster (cluster offset): \t\t%u\n", root_clu);
+ exfat_info("Volume Serial: \t\t\t\t0x%x\n", le32_to_cpu(pbsx->vol_serial));
+ exfat_info("Sector Size Bits: \t\t\t%u\n", pbsx->sect_size_bits);
+ exfat_info("Sector per Cluster bits: \t\t%u\n\n", pbsx->sect_per_clus_bits);
+
+ bd->cluster_size =
+ 1 << (pbsx->sect_per_clus_bits + pbsx->sect_size_bits);
+ root_clu_off = exfat_clus_to_blk_dev_off(bd, clu_offset, root_clu);
+
+ ed = malloc(sizeof(struct exfat_dentry)*3);
+ if (!ed) {
+ exfat_err("failed to allocate memory\n");
+ ret = -ENOMEM;
+ goto free_ppbr;
+ }
+
+ ret = exfat_read(bd->dev_fd, ed, sizeof(struct exfat_dentry)*3,
+ root_clu_off);
+ if (ret < 0) {
+ exfat_err("bitmap entry read failed: %d\n", errno);
+ ret = -EIO;
+ goto free_entry;
+ }
+
+ volume_label = exfat_conv_volume_serial(&ed[0]);
+ if (!volume_label) {
+ ret = -EINVAL;
+ goto free_entry;
+ }
+
+ bitmap_clu = le32_to_cpu(ed[1].bitmap_start_clu);
+ bitmap_clu_off = exfat_clus_to_blk_dev_off(bd, clu_offset,
+ bitmap_clu);
+ bitmap_len = le64_to_cpu(ed[1].bitmap_size);
+
+ exfat_info("----------------- Dump Root entries -----------------\n");
+ exfat_info("Volume entry type: \t\t\t0x%x\n", ed[0].type);
+ exfat_info("Volume label: \t\t\t\t%s\n", volume_label);
+ exfat_info("Volume label character count: \t\t%u\n", ed[0].vol_char_cnt);
+
+ exfat_info("Bitmap entry type: \t\t\t0x%x\n", ed[1].type);
+ exfat_info("Bitmap start cluster: \t\t\t%x\n", bitmap_clu);
+ exfat_info("Bitmap size: \t\t\t\t%llu\n", bitmap_len);
+
+ exfat_info("Upcase table entry type: \t\t0x%x\n", ed[2].type);
+ exfat_info("Upcase table start cluster: \t\t%x\n",
+ le32_to_cpu(ed[2].upcase_start_clu));
+ exfat_info("Upcase table size: \t\t\t%" PRIu64 "\n\n",
+ le64_to_cpu(ed[2].upcase_size));
+
+ bitmap = malloc(bitmap_len);
+ if (!bitmap) {
+ exfat_err("bitmap allocation failed\n");
+ goto free_volume_label;
+ }
+
+ ret = exfat_read(bd->dev_fd, bitmap, bitmap_len, bitmap_clu_off);
+ if (ret < 0) {
+ exfat_err("bitmap entry read failed: %d\n", errno);
+ ret = -EIO;
+ free(bitmap);
+ goto free_volume_label;
+ }
+
+ total_clus = le32_to_cpu(pbsx->clu_count);
+ used_clus = exfat_count_used_clusters(bitmap, bitmap_len);
+
+ exfat_info("---------------- Show the statistics ----------------\n");
+ exfat_info("Cluster size: \t\t\t\t%u\n", bd->cluster_size);
+ exfat_info("Total Clusters: \t\t\t%u\n", total_clus);
+ exfat_info("Free Clusters: \t\t\t\t%u\n", total_clus-used_clus);
+
+ free(bitmap);
+
+free_volume_label:
+ free(volume_label);
+free_entry:
+ free(ed);
+free_ppbr:
+ free(ppbr);
+ return ret;
+}
+
+int main(int argc, char *argv[])
+{
+ int c;
+ int ret = EXIT_FAILURE;
+ struct exfat_blk_dev bd;
+ struct exfat_user_input ui;
+ bool version_only = false;
+
+ init_user_input(&ui);
+
+ if (!setlocale(LC_CTYPE, ""))
+ exfat_err("failed to init locale/codeset\n");
+
+ opterr = 0;
+ while ((c = getopt_long(argc, argv, "iVh", opts, NULL)) != EOF)
+ switch (c) {
+ case 'V':
+ version_only = true;
+ break;
+ case '?':
+ case 'h':
+ default:
+ usage();
+ }
+
+ show_version();
+ if (version_only)
+ exit(EXIT_FAILURE);
+
+ if (argc < 2)
+ usage();
+
+ memset(ui.dev_name, 0, sizeof(ui.dev_name));
+ snprintf(ui.dev_name, sizeof(ui.dev_name), "%s", argv[1]);
+
+ ret = exfat_get_blk_dev_info(&ui, &bd);
+ if (ret < 0)
+ goto out;
+
+ ret = exfat_show_ondisk_all_info(&bd);
+ close(bd.dev_fd);
+
+out:
+ return ret;
+}
projects / sven / exfatprogs.git / blobdiff