119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * initialize.c --- initialize a filesystem handle given superblock 319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * parameters. Used by mke2fs when initializing a filesystem. 43984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt * 519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Copyright (C) 1994, 1995, 1996 Theodore Ts'o. 63984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt * 719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * %Begin-Header% 88558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall * This file may be redistributed under the terms of the GNU Library 98558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall * General Public License, version 2. 1019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * %End-Header% 1119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 1219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 1319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#include <stdio.h> 1419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#include <string.h> 1519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#if HAVE_UNISTD_H 1619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#include <unistd.h> 1719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif 1819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#include <fcntl.h> 1919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#include <time.h> 2019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#if HAVE_SYS_STAT_H 2119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#include <sys/stat.h> 2219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif 2319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#if HAVE_SYS_TYPES_H 2419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#include <sys/types.h> 2519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif 2619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 2719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#include "ext2_fs.h" 2819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#include "ext2fs.h" 2919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 3019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#if defined(__linux__) && defined(EXT2_OS_LINUX) 3119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define CREATOR_OS EXT2_OS_LINUX 3219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#else 3319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#if defined(__GNU__) && defined(EXT2_OS_HURD) 3419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define CREATOR_OS EXT2_OS_HURD 3519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#else 3619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#if defined(__FreeBSD__) && defined(EXT2_OS_FREEBSD) 3719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define CREATOR_OS EXT2_OS_FREEBSD 3819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#else 3919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#if defined(LITES) && defined(EXT2_OS_LITES) 4019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define CREATOR_OS EXT2_OS_LITES 4119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#else 4219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define CREATOR_OS EXT2_OS_LINUX /* by default */ 4319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif /* defined(LITES) && defined(EXT2_OS_LITES) */ 4419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif /* defined(__FreeBSD__) && defined(EXT2_OS_FREEBSD) */ 4519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif /* defined(__GNU__) && defined(EXT2_OS_HURD) */ 4619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif /* defined(__linux__) && defined(EXT2_OS_LINUX) */ 473984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt 4819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 4919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Note we override the kernel include file's idea of what the default 5019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * check interval (never) should be. It's a good idea to check at 5119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * least *occasionally*, specially since servers will never rarely get 5219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * to reboot, since Linux is so robust these days. :-) 533984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt * 5419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * 180 days (six months) seems like a good value. 5519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 5619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#ifdef EXT2_DFL_CHECKINTERVAL 5719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#undef EXT2_DFL_CHECKINTERVAL 5819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif 5919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DFL_CHECKINTERVAL (86400L * 180L) 6019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 6119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 6219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Calculate the number of GDT blocks to reserve for online filesystem growth. 6319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * The absolute maximum number of GDT blocks we can reserve is determined by 6419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * the number of block pointers that can fit into a single block. 6519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 6619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstatic unsigned int calc_reserved_gdt_blocks(ext2_filsys fs) 6719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project{ 6819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project struct ext2_super_block *sb = fs->super; 6919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project unsigned long bpg = sb->s_blocks_per_group; 703984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt unsigned int gdpb = EXT2_DESC_PER_BLOCK(sb); 7119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project unsigned long max_blocks = 0xffffffff; 7219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project unsigned long rsv_groups; 7319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project unsigned int rsv_gdb; 7419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 7519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project /* We set it at 1024x the current filesystem size, or 7619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * the upper block count limit (2^32), whichever is lower. 7719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 7819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (sb->s_blocks_count < max_blocks / 1024) 7919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project max_blocks = sb->s_blocks_count * 1024; 8019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project rsv_groups = ext2fs_div_ceil(max_blocks - sb->s_first_data_block, bpg); 8119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project rsv_gdb = ext2fs_div_ceil(rsv_groups, gdpb) - fs->desc_blocks; 8219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (rsv_gdb > EXT2_ADDR_PER_BLOCK(sb)) 8319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project rsv_gdb = EXT2_ADDR_PER_BLOCK(sb); 8419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#ifdef RES_GDT_DEBUG 8519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project printf("max_blocks %lu, rsv_groups = %lu, rsv_gdb = %u\n", 8619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project max_blocks, rsv_groups, rsv_gdb); 8719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif 8819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 8919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project return rsv_gdb; 9019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project} 9119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 9219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projecterrcode_t ext2fs_initialize(const char *name, int flags, 9319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project struct ext2_super_block *param, 9419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project io_manager manager, ext2_filsys *ret_fs) 9519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project{ 9619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project ext2_filsys fs; 9719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project errcode_t retval; 9819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project struct ext2_super_block *super; 9919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project int frags_per_block; 10019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project unsigned int rem; 10119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project unsigned int overhead = 0; 10219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project unsigned int ipg; 10319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project dgrp_t i; 10419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project blk_t numblocks; 10519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project int rsv_gdt; 1063984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt int csum_flag; 10719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project int io_flags; 1083984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt char *buf = 0; 10919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project char c; 11019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 11119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (!param || !param->s_blocks_count) 11219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project return EXT2_ET_INVALID_ARGUMENT; 1133984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt 11419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project retval = ext2fs_get_mem(sizeof(struct struct_ext2_filsys), &fs); 11519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (retval) 11619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project return retval; 1173984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt 11819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project memset(fs, 0, sizeof(struct struct_ext2_filsys)); 11919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project fs->magic = EXT2_ET_MAGIC_EXT2FS_FILSYS; 12019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project fs->flags = flags | EXT2_FLAG_RW; 12119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project fs->umask = 022; 12219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#ifdef WORDS_BIGENDIAN 12319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project fs->flags |= EXT2_FLAG_SWAP_BYTES; 12419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif 12519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project io_flags = IO_FLAG_RW; 12619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (flags & EXT2_FLAG_EXCLUSIVE) 12719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project io_flags |= IO_FLAG_EXCLUSIVE; 12819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project retval = manager->open(name, io_flags, &fs->io); 12919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (retval) 13019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project goto cleanup; 13119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project fs->image_io = fs->io; 13219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project fs->io->app_data = fs; 13319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project retval = ext2fs_get_mem(strlen(name)+1, &fs->device_name); 13419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (retval) 13519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project goto cleanup; 13619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 13719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project strcpy(fs->device_name, name); 13819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &super); 13919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (retval) 14019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project goto cleanup; 14119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project fs->super = super; 14219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 14319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project memset(super, 0, SUPERBLOCK_SIZE); 14419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 14519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define set_field(field, default) (super->field = param->field ? \ 14619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project param->field : (default)) 14719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 14819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project super->s_magic = EXT2_SUPER_MAGIC; 14919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project super->s_state = EXT2_VALID_FS; 15019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 15119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project set_field(s_log_block_size, 0); /* default blocksize: 1024 bytes */ 15219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project set_field(s_log_frag_size, 0); /* default fragsize: 1024 bytes */ 15319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project set_field(s_first_data_block, super->s_log_block_size ? 0 : 1); 15419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project set_field(s_max_mnt_count, EXT2_DFL_MAX_MNT_COUNT); 15519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project set_field(s_errors, EXT2_ERRORS_DEFAULT); 15619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project set_field(s_feature_compat, 0); 15719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project set_field(s_feature_incompat, 0); 15819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project set_field(s_feature_ro_compat, 0); 15919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project set_field(s_first_meta_bg, 0); 16019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project set_field(s_raid_stride, 0); /* default stride size: 0 */ 16119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project set_field(s_raid_stripe_width, 0); /* default stripe width: 0 */ 1623984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt set_field(s_log_groups_per_flex, 0); 16319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project set_field(s_flags, 0); 16419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (super->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP) { 16519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project retval = EXT2_ET_UNSUPP_FEATURE; 16619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project goto cleanup; 16719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } 16819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (super->s_feature_ro_compat & ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP) { 16919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project retval = EXT2_ET_RO_UNSUPP_FEATURE; 17019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project goto cleanup; 17119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } 17219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 17319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project set_field(s_rev_level, EXT2_GOOD_OLD_REV); 17419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (super->s_rev_level >= EXT2_DYNAMIC_REV) { 17519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project set_field(s_first_ino, EXT2_GOOD_OLD_FIRST_INO); 17619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project set_field(s_inode_size, EXT2_GOOD_OLD_INODE_SIZE); 1773984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if (super->s_inode_size >= sizeof(struct ext2_inode_large)) { 1783984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt int extra_isize = sizeof(struct ext2_inode_large) - 1793984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt EXT2_GOOD_OLD_INODE_SIZE; 1803984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt set_field(s_min_extra_isize, extra_isize); 1813984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt set_field(s_want_extra_isize, extra_isize); 1823984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt } 1833984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt } else { 1843984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt super->s_first_ino = EXT2_GOOD_OLD_FIRST_INO; 1853984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt super->s_inode_size = EXT2_GOOD_OLD_INODE_SIZE; 18619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } 18719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 18819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project set_field(s_checkinterval, EXT2_DFL_CHECKINTERVAL); 18919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project super->s_mkfs_time = super->s_lastcheck = fs->now ? fs->now : time(NULL); 19019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 19119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project super->s_creator_os = CREATOR_OS; 19219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 19319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project fs->blocksize = EXT2_BLOCK_SIZE(super); 19419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project fs->fragsize = EXT2_FRAG_SIZE(super); 19519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project frags_per_block = fs->blocksize / fs->fragsize; 19619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 19719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project /* default: (fs->blocksize*8) blocks/group, up to 2^16 (GDT limit) */ 19819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project set_field(s_blocks_per_group, fs->blocksize * 8); 19919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (super->s_blocks_per_group > EXT2_MAX_BLOCKS_PER_GROUP(super)) 20019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project super->s_blocks_per_group = EXT2_MAX_BLOCKS_PER_GROUP(super); 20119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project super->s_frags_per_group = super->s_blocks_per_group * frags_per_block; 2023984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt 20319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project super->s_blocks_count = param->s_blocks_count; 20419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project super->s_r_blocks_count = param->s_r_blocks_count; 20519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (super->s_r_blocks_count >= param->s_blocks_count) { 20619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project retval = EXT2_ET_INVALID_ARGUMENT; 20719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project goto cleanup; 20819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } 20919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 21019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project /* 21119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * If we're creating an external journal device, we don't need 21219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * to bother with the rest. 21319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 21419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) { 21519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project fs->group_desc_count = 0; 21619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project ext2fs_mark_super_dirty(fs); 21719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project *ret_fs = fs; 21819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project return 0; 21919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } 22019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 22119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectretry: 22219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project fs->group_desc_count = ext2fs_div_ceil(super->s_blocks_count - 22319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project super->s_first_data_block, 22419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project EXT2_BLOCKS_PER_GROUP(super)); 22519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (fs->group_desc_count == 0) { 22619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project retval = EXT2_ET_TOOSMALL; 22719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project goto cleanup; 22819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } 22919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project fs->desc_blocks = ext2fs_div_ceil(fs->group_desc_count, 23019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project EXT2_DESC_PER_BLOCK(super)); 23119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 23219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project i = fs->blocksize >= 4096 ? 1 : 4096 / fs->blocksize; 23319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project set_field(s_inodes_count, super->s_blocks_count / i); 23419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 23519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project /* 23619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Make sure we have at least EXT2_FIRST_INO + 1 inodes, so 23719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * that we have enough inodes for the filesystem(!) 23819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 23919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (super->s_inodes_count < EXT2_FIRST_INODE(super)+1) 24019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project super->s_inodes_count = EXT2_FIRST_INODE(super)+1; 2413984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt 24219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project /* 24319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * There should be at least as many inodes as the user 24419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * requested. Figure out how many inodes per group that 24519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * should be. But make sure that we don't allocate more than 24619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * one bitmap's worth of inodes each group. 24719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 24819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project ipg = ext2fs_div_ceil(super->s_inodes_count, fs->group_desc_count); 24919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (ipg > fs->blocksize * 8) { 25019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (super->s_blocks_per_group >= 256) { 25119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project /* Try again with slightly different parameters */ 25219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project super->s_blocks_per_group -= 8; 25319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project super->s_blocks_count = param->s_blocks_count; 25419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project super->s_frags_per_group = super->s_blocks_per_group * 25519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project frags_per_block; 25619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project goto retry; 2573984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt } else { 2583984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt retval = EXT2_ET_TOO_MANY_INODES; 2593984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt goto cleanup; 2603984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt } 26119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } 26219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 26319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (ipg > (unsigned) EXT2_MAX_INODES_PER_GROUP(super)) 26419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project ipg = EXT2_MAX_INODES_PER_GROUP(super); 26519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 26619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectipg_retry: 26719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project super->s_inodes_per_group = ipg; 26819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 26919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project /* 27019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Make sure the number of inodes per group completely fills 27119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * the inode table blocks in the descriptor. If not, add some 27219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * additional inodes/group. Waste not, want not... 27319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 27419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project fs->inode_blocks_per_group = (((super->s_inodes_per_group * 27519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project EXT2_INODE_SIZE(super)) + 27619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project EXT2_BLOCK_SIZE(super) - 1) / 27719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project EXT2_BLOCK_SIZE(super)); 27819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project super->s_inodes_per_group = ((fs->inode_blocks_per_group * 27919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project EXT2_BLOCK_SIZE(super)) / 28019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project EXT2_INODE_SIZE(super)); 28119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project /* 28219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Finally, make sure the number of inodes per group is a 28319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * multiple of 8. This is needed to simplify the bitmap 28419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * splicing code. 28519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 28619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project super->s_inodes_per_group &= ~7; 28719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project fs->inode_blocks_per_group = (((super->s_inodes_per_group * 28819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project EXT2_INODE_SIZE(super)) + 28919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project EXT2_BLOCK_SIZE(super) - 1) / 29019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project EXT2_BLOCK_SIZE(super)); 29119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 29219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project /* 29319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * adjust inode count to reflect the adjusted inodes_per_group 29419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 29519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if ((__u64)super->s_inodes_per_group * fs->group_desc_count > ~0U) { 29619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project ipg--; 29719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project goto ipg_retry; 29819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } 29919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project super->s_inodes_count = super->s_inodes_per_group * 30019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project fs->group_desc_count; 30119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project super->s_free_inodes_count = super->s_inodes_count; 30219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 30319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project /* 30419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * check the number of reserved group descriptor table blocks 30519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 30619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (super->s_feature_compat & EXT2_FEATURE_COMPAT_RESIZE_INODE) 30719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project rsv_gdt = calc_reserved_gdt_blocks(fs); 30819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project else 30919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project rsv_gdt = 0; 31019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project set_field(s_reserved_gdt_blocks, rsv_gdt); 31119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (super->s_reserved_gdt_blocks > EXT2_ADDR_PER_BLOCK(super)) { 31219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project retval = EXT2_ET_RES_GDT_BLOCKS; 31319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project goto cleanup; 31419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } 31519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 31619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project /* 31719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Calculate the maximum number of bookkeeping blocks per 31819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * group. It includes the superblock, the block group 31919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * descriptors, the block bitmap, the inode bitmap, the inode 32019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * table, and the reserved gdt blocks. 32119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 32219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project overhead = (int) (3 + fs->inode_blocks_per_group + 32319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project fs->desc_blocks + super->s_reserved_gdt_blocks); 32419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 32519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project /* This can only happen if the user requested too many inodes */ 3263984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if (overhead > super->s_blocks_per_group) { 3273984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt retval = EXT2_ET_TOO_MANY_INODES; 3283984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt goto cleanup; 3293984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt } 33019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 33119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project /* 33219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * See if the last group is big enough to support the 33319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * necessary data structures. If not, we need to get rid of 33419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * it. We need to recalculate the overhead for the last block 33519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * group, since it might or might not have a superblock 33619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * backup. 33719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 33819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project overhead = (int) (2 + fs->inode_blocks_per_group); 33919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (ext2fs_bg_has_super(fs, fs->group_desc_count - 1)) 34019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project overhead += 1 + fs->desc_blocks + super->s_reserved_gdt_blocks; 34119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project rem = ((super->s_blocks_count - super->s_first_data_block) % 34219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project super->s_blocks_per_group); 3433984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if ((fs->group_desc_count == 1) && rem && (rem < overhead)) { 3443984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt retval = EXT2_ET_TOOSMALL; 3453984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt goto cleanup; 3463984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt } 34719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (rem && (rem < overhead+50)) { 34819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project super->s_blocks_count -= rem; 34919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project goto retry; 35019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } 35119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 35219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project /* 35319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * At this point we know how big the filesystem will be. So 35419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * we can do any and all allocations that depend on the block 35519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * count. 35619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 35719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 35819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project retval = ext2fs_get_mem(strlen(fs->device_name) + 80, &buf); 35919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (retval) 36019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project goto cleanup; 3613984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt 3623984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt strcpy(buf, "block bitmap for "); 3633984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt strcat(buf, fs->device_name); 36419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project retval = ext2fs_allocate_block_bitmap(fs, buf, &fs->block_map); 36519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (retval) 36619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project goto cleanup; 3673984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt 3683984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt strcpy(buf, "inode bitmap for "); 3693984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt strcat(buf, fs->device_name); 37019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project retval = ext2fs_allocate_inode_bitmap(fs, buf, &fs->inode_map); 37119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (retval) 37219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project goto cleanup; 37319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 37419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project ext2fs_free_mem(&buf); 37519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 37619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project retval = ext2fs_get_array(fs->desc_blocks, fs->blocksize, 37719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project &fs->group_desc); 37819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (retval) 37919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project goto cleanup; 38019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 38119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project memset(fs->group_desc, 0, (size_t) fs->desc_blocks * fs->blocksize); 38219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 38319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project /* 38419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Reserve the superblock and group descriptors for each 38519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * group, and fill in the correct group statistics for group. 38619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Note that although the block bitmap, inode bitmap, and 38719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * inode table have not been allocated (and in fact won't be 38819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * by this routine), they are accounted for nevertheless. 3893984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt * 3903984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt * If FLEX_BG meta-data grouping is used, only account for the 3913984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt * superblock and group descriptors (the inode tables and 3923984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt * bitmaps will be accounted for when allocated). 39319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 39419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project super->s_free_blocks_count = 0; 3953984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt csum_flag = EXT2_HAS_RO_COMPAT_FEATURE(fs->super, 3963984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt EXT4_FEATURE_RO_COMPAT_GDT_CSUM); 39719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project for (i = 0; i < fs->group_desc_count; i++) { 3983984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt /* 3993984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt * Don't set the BLOCK_UNINIT group for the last group 4003984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt * because the block bitmap needs to be padded. 4013984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt */ 4023984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if (csum_flag) { 4033984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if (i != fs->group_desc_count - 1) 4043984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt fs->group_desc[i].bg_flags |= 4053984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt EXT2_BG_BLOCK_UNINIT; 4063984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt fs->group_desc[i].bg_flags |= EXT2_BG_INODE_UNINIT; 4073984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt numblocks = super->s_inodes_per_group; 4083984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if (i == 0) 4093984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt numblocks -= super->s_first_ino; 4103984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt fs->group_desc[i].bg_itable_unused = numblocks; 4113984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt } 41219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project numblocks = ext2fs_reserve_super_and_bgd(fs, i, fs->block_map); 4133984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if (fs->super->s_log_groups_per_flex) 4143984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt numblocks += 2 + fs->inode_blocks_per_group; 41519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 41619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project super->s_free_blocks_count += numblocks; 41719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project fs->group_desc[i].bg_free_blocks_count = numblocks; 41819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project fs->group_desc[i].bg_free_inodes_count = 41919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project fs->super->s_inodes_per_group; 42019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project fs->group_desc[i].bg_used_dirs_count = 0; 4213984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt ext2fs_group_desc_csum_set(fs, i); 42219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } 4233984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt 42419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project c = (char) 255; 42519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (((int) c) == -1) { 42619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project super->s_flags |= EXT2_FLAGS_SIGNED_HASH; 42719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } else { 42819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project super->s_flags |= EXT2_FLAGS_UNSIGNED_HASH; 42919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } 43019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 43119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project ext2fs_mark_super_dirty(fs); 43219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project ext2fs_mark_bb_dirty(fs); 43319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project ext2fs_mark_ib_dirty(fs); 4343984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt 43519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project io_channel_set_blksize(fs->io, fs->blocksize); 43619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 43719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project *ret_fs = fs; 43819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project return 0; 43919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectcleanup: 4403984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt free(buf); 44119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project ext2fs_free(fs); 44219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project return retval; 44319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project} 444