e2freefrag.c revision 4efbac6fed75c29d3d5f1b676b932754653a2ac5
10b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o/* 20b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o * e2freefrag - report filesystem free-space fragmentation 30b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o * 40b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o * Copyright (C) 2009 Sun Microsystems, Inc. 50b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o * 60b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o * Author: Rupesh Thakare <rupesh@sun.com> 70b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o * Andreas Dilger <adilger@sun.com> 80b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o * 90b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o * %Begin-Header% 100b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o * This file may be redistributed under the terms of the GNU Public 110b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o * License version 2. 120b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o * %End-Header% 130b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o */ 140b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o#include <stdio.h> 150b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o#ifdef HAVE_UNISTD_H 160b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o#include <unistd.h> 170b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o#endif 180b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o#ifdef HAVE_STDLIB_H 190b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o#include <stdlib.h> 200b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o#endif 210b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o#ifdef HAVE_GETOPT_H 220b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o#include <getopt.h> 230b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o#else 240b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'oextern char *optarg; 250b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'oextern int optind; 260b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o#endif 270b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 280b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o#include "ext2fs/ext2_fs.h" 290b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o#include "ext2fs/ext2fs.h" 300b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o#include "e2freefrag.h" 310b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 320b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'ovoid usage(const char *prog) 330b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o{ 340b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o fprintf(stderr, "usage: %s [-c chunksize in kb] [-h] " 350b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o "device_name\n", prog); 360b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o exit(1); 370b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o} 380b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 390b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'ostatic int ul_log2(unsigned long arg) 400b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o{ 410b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o int l = 0; 420b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 430b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o arg >>= 1; 440b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o while (arg) { 450b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o l++; 460b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o arg >>= 1; 470b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o } 480b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o return l; 490b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o} 500b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 510b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'ovoid init_chunk_info(ext2_filsys fs, struct chunk_info *info) 520b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o{ 530b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o int i; 540b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 550b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o info->blocksize_bits = ul_log2((unsigned long)fs->blocksize); 56cba91c4b52f9e2fb3afee5513e87d95f9193421aTheodore Ts'o if (info->chunkbytes) { 57cba91c4b52f9e2fb3afee5513e87d95f9193421aTheodore Ts'o info->chunkbits = ul_log2(info->chunkbytes); 58cba91c4b52f9e2fb3afee5513e87d95f9193421aTheodore Ts'o info->blks_in_chunk = info->chunkbytes >> info->blocksize_bits; 59cba91c4b52f9e2fb3afee5513e87d95f9193421aTheodore Ts'o } else { 60cba91c4b52f9e2fb3afee5513e87d95f9193421aTheodore Ts'o info->chunkbits = ul_log2(DEFAULT_CHUNKSIZE); 61cba91c4b52f9e2fb3afee5513e87d95f9193421aTheodore Ts'o info->blks_in_chunk = DEFAULT_CHUNKSIZE >> info->blocksize_bits; 62cba91c4b52f9e2fb3afee5513e87d95f9193421aTheodore Ts'o } 630b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 640b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o info->min = ~0UL; 650b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o info->max = info->avg = 0; 660b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o info->real_free_chunks = 0; 670b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 68ad751f11ecab50ec78a4b50ae95af3e7b2c4f06aAndreas Dilger for (i = 0; i < MAX_HIST; i++) { 69ad751f11ecab50ec78a4b50ae95af3e7b2c4f06aAndreas Dilger info->histogram.fc_chunks[i] = 0; 70ad751f11ecab50ec78a4b50ae95af3e7b2c4f06aAndreas Dilger info->histogram.fc_blocks[i] = 0; 71ad751f11ecab50ec78a4b50ae95af3e7b2c4f06aAndreas Dilger } 720b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o} 730b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 741e48a456b6ca646d66483761e959a81ae78b9156Theodore Ts'ovoid update_chunk_stats(struct chunk_info *info, unsigned long chunk_size) 751e48a456b6ca646d66483761e959a81ae78b9156Theodore Ts'o{ 761e48a456b6ca646d66483761e959a81ae78b9156Theodore Ts'o unsigned long index; 771e48a456b6ca646d66483761e959a81ae78b9156Theodore Ts'o 781e48a456b6ca646d66483761e959a81ae78b9156Theodore Ts'o index = ul_log2(chunk_size) + 1; 791e48a456b6ca646d66483761e959a81ae78b9156Theodore Ts'o if (index >= MAX_HIST) 801e48a456b6ca646d66483761e959a81ae78b9156Theodore Ts'o index = MAX_HIST-1; 811e48a456b6ca646d66483761e959a81ae78b9156Theodore Ts'o info->histogram.fc_chunks[index]++; 821e48a456b6ca646d66483761e959a81ae78b9156Theodore Ts'o info->histogram.fc_blocks[index] += chunk_size; 831e48a456b6ca646d66483761e959a81ae78b9156Theodore Ts'o 841e48a456b6ca646d66483761e959a81ae78b9156Theodore Ts'o if (chunk_size > info->max) 851e48a456b6ca646d66483761e959a81ae78b9156Theodore Ts'o info->max = chunk_size; 861e48a456b6ca646d66483761e959a81ae78b9156Theodore Ts'o if (chunk_size < info->min) 871e48a456b6ca646d66483761e959a81ae78b9156Theodore Ts'o info->min = chunk_size; 881e48a456b6ca646d66483761e959a81ae78b9156Theodore Ts'o info->avg += chunk_size; 891e48a456b6ca646d66483761e959a81ae78b9156Theodore Ts'o info->real_free_chunks++; 901e48a456b6ca646d66483761e959a81ae78b9156Theodore Ts'o} 911e48a456b6ca646d66483761e959a81ae78b9156Theodore Ts'o 920b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'ovoid scan_block_bitmap(ext2_filsys fs, struct chunk_info *info) 930b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o{ 944efbac6fed75c29d3d5f1b676b932754653a2ac5Valerie Aurora Henson unsigned long long blocks_count = ext2fs_blocks_count(fs->super); 950b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o unsigned long long chunks = (blocks_count + info->blks_in_chunk) >> 960b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o (info->chunkbits - info->blocksize_bits); 970b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o unsigned long long chunk_num; 980b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o unsigned long last_chunk_size = 0; 990b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o unsigned long long chunk_start_blk = 0; 1003e343b8d9af349301a2acd6b4328fb5663deb60cTheodore Ts'o int used; 1010b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 1020b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o for (chunk_num = 0; chunk_num < chunks; chunk_num++) { 1030b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o unsigned long long blk, num_blks; 1040b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o int chunk_free; 1050b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 1060b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o /* Last chunk may be smaller */ 1070b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o if (chunk_start_blk + info->blks_in_chunk > blocks_count) 1080b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o num_blks = blocks_count - chunk_start_blk; 1090b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o else 1100b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o num_blks = info->blks_in_chunk; 1110b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 1120b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o chunk_free = 0; 1130b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 1140b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o /* Initialize starting block for first chunk correctly else 1150b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o * there is a segfault when blocksize = 1024 in which case 1160b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o * block_map->start = 1 */ 1173e343b8d9af349301a2acd6b4328fb5663deb60cTheodore Ts'o for (blk = 0; blk < num_blks; blk++, chunk_start_blk++) { 1183e343b8d9af349301a2acd6b4328fb5663deb60cTheodore Ts'o if (chunk_num == 0 && blk == 0) { 1193e343b8d9af349301a2acd6b4328fb5663deb60cTheodore Ts'o blk = fs->super->s_first_data_block; 1203e343b8d9af349301a2acd6b4328fb5663deb60cTheodore Ts'o chunk_start_blk = blk; 1213e343b8d9af349301a2acd6b4328fb5663deb60cTheodore Ts'o } 1223c041a514cf65c65e102ff22e0dee2a3fa724873Valerie Aurora Henson used = ext2fs_fast_test_block_bitmap2(fs->block_map, 1233e343b8d9af349301a2acd6b4328fb5663deb60cTheodore Ts'o chunk_start_blk); 1240b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o if (!used) { 1250b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o last_chunk_size++; 1260b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o chunk_free++; 1270b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o } 1280b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 1290b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o if (used && last_chunk_size != 0) { 1301e48a456b6ca646d66483761e959a81ae78b9156Theodore Ts'o update_chunk_stats(info, last_chunk_size); 1310b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o last_chunk_size = 0; 1320b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o } 1330b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o } 1340b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 1350b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o if (chunk_free == info->blks_in_chunk) 1360b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o info->free_chunks++; 1370b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o } 1381e48a456b6ca646d66483761e959a81ae78b9156Theodore Ts'o if (last_chunk_size != 0) 1391e48a456b6ca646d66483761e959a81ae78b9156Theodore Ts'o update_chunk_stats(info, last_chunk_size); 1400b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o} 1410b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 1420b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'oerrcode_t get_chunk_info(ext2_filsys fs, struct chunk_info *info) 1430b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o{ 1440b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o unsigned long total_chunks; 1450b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o char *unitp = "KMGTPEZY"; 1460b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o int units = 10; 1470b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o unsigned long start = 0, end, cum; 1480b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o int i, retval = 0; 1490b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 1500b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o scan_block_bitmap(fs, info); 1510b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 1524efbac6fed75c29d3d5f1b676b932754653a2ac5Valerie Aurora Henson printf("Total blocks: %llu\nFree blocks: %u (%0.1f%%)\n", 1534efbac6fed75c29d3d5f1b676b932754653a2ac5Valerie Aurora Henson ext2fs_blocks_count(fs->super), fs->super->s_free_blocks_count, 1540b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o (double)fs->super->s_free_blocks_count * 100 / 1554efbac6fed75c29d3d5f1b676b932754653a2ac5Valerie Aurora Henson ext2fs_blocks_count(fs->super)); 1560b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 157cba91c4b52f9e2fb3afee5513e87d95f9193421aTheodore Ts'o if (info->chunkbytes) { 158cba91c4b52f9e2fb3afee5513e87d95f9193421aTheodore Ts'o printf("\nChunksize: %lu bytes (%u blocks)\n", 159cba91c4b52f9e2fb3afee5513e87d95f9193421aTheodore Ts'o info->chunkbytes, info->blks_in_chunk); 1604efbac6fed75c29d3d5f1b676b932754653a2ac5Valerie Aurora Henson total_chunks = (ext2fs_blocks_count(fs->super) + 161cba91c4b52f9e2fb3afee5513e87d95f9193421aTheodore Ts'o info->blks_in_chunk) >> 162cba91c4b52f9e2fb3afee5513e87d95f9193421aTheodore Ts'o (info->chunkbits - info->blocksize_bits); 163cba91c4b52f9e2fb3afee5513e87d95f9193421aTheodore Ts'o printf("Total chunks: %lu\nFree chunks: %lu (%0.1f%%)\n", 164cba91c4b52f9e2fb3afee5513e87d95f9193421aTheodore Ts'o total_chunks, info->free_chunks, 165cba91c4b52f9e2fb3afee5513e87d95f9193421aTheodore Ts'o (double)info->free_chunks * 100 / total_chunks); 166cba91c4b52f9e2fb3afee5513e87d95f9193421aTheodore Ts'o } 1670b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 1680b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o /* Display chunk information in KB */ 1690b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o if (info->real_free_chunks) { 1700b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o info->min = (info->min * fs->blocksize) >> 10; 1710b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o info->max = (info->max * fs->blocksize) >> 10; 1720b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o info->avg = (info->avg / info->real_free_chunks * 1730b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o fs->blocksize) >> 10; 1740b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o } else { 1750b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o info->min = 0; 1760b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o } 1770b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 178aff2cf8ed2dfd5f453075122738ba6fdacda334eTheodore Ts'o printf("\nMin. free extent: %lu KB \nMax. free extent: %lu KB\n" 179aff2cf8ed2dfd5f453075122738ba6fdacda334eTheodore Ts'o "Avg. free extent: %lu KB\n", info->min, info->max, info->avg); 1800b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 181aff2cf8ed2dfd5f453075122738ba6fdacda334eTheodore Ts'o printf("\nHISTOGRAM OF FREE EXTENT SIZES:\n"); 182aff2cf8ed2dfd5f453075122738ba6fdacda334eTheodore Ts'o printf("%s : %12s %12s %7s\n", "Extent Size Range", "Free extents", 183ad751f11ecab50ec78a4b50ae95af3e7b2c4f06aAndreas Dilger "Free Blocks", "Percent"); 1840b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o for (i = 0; i < MAX_HIST; i++) { 1850b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o end = 1 << (i + info->blocksize_bits - units); 1861e48a456b6ca646d66483761e959a81ae78b9156Theodore Ts'o if (info->histogram.fc_chunks[i] != 0) { 1871e48a456b6ca646d66483761e959a81ae78b9156Theodore Ts'o char end_str[32]; 1881e48a456b6ca646d66483761e959a81ae78b9156Theodore Ts'o 1891e48a456b6ca646d66483761e959a81ae78b9156Theodore Ts'o sprintf(end_str, "%5lu%c-", end, *unitp); 1901e48a456b6ca646d66483761e959a81ae78b9156Theodore Ts'o if (i == MAX_HIST-1) 1911e48a456b6ca646d66483761e959a81ae78b9156Theodore Ts'o strcpy(end_str, "max "); 1921e48a456b6ca646d66483761e959a81ae78b9156Theodore Ts'o printf("%5lu%c...%7s : %12lu %12lu %6.2f%%\n", 1931e48a456b6ca646d66483761e959a81ae78b9156Theodore Ts'o start, *unitp, end_str, 194ad751f11ecab50ec78a4b50ae95af3e7b2c4f06aAndreas Dilger info->histogram.fc_chunks[i], 195ad751f11ecab50ec78a4b50ae95af3e7b2c4f06aAndreas Dilger info->histogram.fc_blocks[i], 196ad751f11ecab50ec78a4b50ae95af3e7b2c4f06aAndreas Dilger (double)info->histogram.fc_blocks[i] * 100 / 197ad751f11ecab50ec78a4b50ae95af3e7b2c4f06aAndreas Dilger fs->super->s_free_blocks_count); 1981e48a456b6ca646d66483761e959a81ae78b9156Theodore Ts'o } 1990b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o start = end; 2000b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o if (start == 1<<10) { 2010b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o start = 1; 2020b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o units += 10; 2030b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o unitp++; 2040b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o } 2050b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o } 2060b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 2070b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o return retval; 2080b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o} 2090b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 2100b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'ovoid close_device(char *device_name, ext2_filsys fs) 2110b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o{ 2120b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o int retval = ext2fs_close(fs); 2130b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 2140b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o if (retval) 2150b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o com_err(device_name, retval, "while closing the filesystem.\n"); 2160b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o} 2170b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 2180b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'ovoid collect_info(ext2_filsys fs, struct chunk_info *chunk_info) 2190b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o{ 2200b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o unsigned int retval = 0, i, free_blks; 2210b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 2220b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o printf("Device: %s\n", fs->device_name); 2230b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o printf("Blocksize: %u bytes\n", fs->blocksize); 2240b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 2250b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o retval = ext2fs_read_block_bitmap(fs); 2260b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o if (retval) { 2270b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o com_err(fs->device_name, retval, "while reading block bitmap"); 2280b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o close_device(fs->device_name, fs); 2290b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o exit(1); 2300b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o } 2310b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 2320b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o init_chunk_info(fs, chunk_info); 2330b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 2340b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o retval = get_chunk_info(fs, chunk_info); 2350b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o if (retval) { 2360b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o com_err(fs->device_name, retval, "while collecting chunk info"); 2370b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o close_device(fs->device_name, fs); 2380b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o exit(1); 2390b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o } 2400b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o} 2410b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 2420b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'ovoid open_device(char *device_name, ext2_filsys *fs) 2430b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o{ 2440b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o int retval; 2450b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o int flag = EXT2_FLAG_FORCE; 2460b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 2470b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o retval = ext2fs_open(device_name, flag, 0, 0, unix_io_manager, fs); 2480b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o if (retval) { 2490b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o com_err(device_name, retval, "while opening filesystem"); 2500b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o exit(1); 2510b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o } 2520b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o} 2530b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 2540b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'oint main(int argc, char *argv[]) 2550b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o{ 256cba91c4b52f9e2fb3afee5513e87d95f9193421aTheodore Ts'o struct chunk_info chunk_info = { }; 2570b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o errcode_t retval = 0; 2580b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o ext2_filsys fs = NULL; 2590b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o char *device_name; 2600b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o char *progname; 2610b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o char c, *end; 2620b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 263137a7dc05c80cd4e0a4e7aeb21ec79f800a9eecdTheodore Ts'o add_error_table(&et_ext2_error_table); 2640b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o progname = argv[0]; 2650b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 2660b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o while ((c = getopt(argc, argv, "c:h")) != EOF) { 2670b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o switch (c) { 2680b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o case 'c': 2690b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o chunk_info.chunkbytes = strtoull(optarg, &end, 0); 2700b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o if (*end != '\0') { 2710b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o fprintf(stderr, "%s: bad chunk size '%s'\n", 2720b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o progname, optarg); 2730b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o usage(progname); 2740b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o } 2750b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o if (chunk_info.chunkbytes & 2760b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o (chunk_info.chunkbytes - 1)) { 2770b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o fprintf(stderr, "%s: chunk size must be a " 278aff2cf8ed2dfd5f453075122738ba6fdacda334eTheodore Ts'o "power of 2.\n", argv[0]); 2790b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o usage(progname); 2800b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o } 2810b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o chunk_info.chunkbytes *= 1024; 2820b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o break; 2830b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o default: 2840b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o fprintf(stderr, "%s: bad option '%c'\n", 2850b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o progname, c); 2860b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o case 'h': 2870b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o usage(progname); 2880b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o break; 2890b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o } 2900b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o } 2910b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 2920b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o if (optind == argc) { 2930b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o fprintf(stderr, "%s: missing device name.\n", progname); 2940b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o usage(progname); 2950b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o } 2960b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 2970b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o device_name = argv[optind]; 2980b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 2990b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o open_device(device_name, &fs); 3000b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 301cba91c4b52f9e2fb3afee5513e87d95f9193421aTheodore Ts'o if (chunk_info.chunkbytes && (chunk_info.chunkbytes < fs->blocksize)) { 3020b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o fprintf(stderr, "%s: chunksize must be greater than or equal " 3030b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o "to filesystem blocksize.\n", progname); 3040b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o exit(1); 3050b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o } 3060b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o collect_info(fs, &chunk_info); 3070b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o close_device(device_name, fs); 3080b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o 3090b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o return retval; 3100b2681f45b7f67eedfea6411eddbb858699ae553Theodore Ts'o} 311