18642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland/* 28642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland * Copyright (C) 2010 The Android Open Source Project 38642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland * 48642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland * Licensed under the Apache License, Version 2.0 (the "License"); 58642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland * you may not use this file except in compliance with the License. 68642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland * You may obtain a copy of the License at 78642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland * 88642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland * http://www.apache.org/licenses/LICENSE-2.0 98642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland * 108642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland * Unless required by applicable law or agreed to in writing, software 118642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland * distributed under the License is distributed on an "AS IS" BASIS, 128642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 138642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland * See the License for the specific language governing permissions and 148642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland * limitations under the License. 158642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland */ 168642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 1733f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross#include "ext4_utils.h" 1833f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross#include "uuid.h" 1933f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross#include "allocate.h" 2033f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross#include "indirect.h" 2133f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross#include "extent.h" 2233f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross 23dc5abeee1e6fc4827ee0d5ece12aaed2dd56f4c7Colin Cross#include <sparse/sparse.h> 24dc5abeee1e6fc4827ee0d5ece12aaed2dd56f4c7Colin Cross 258642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland#include <fcntl.h> 268642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland#include <sys/stat.h> 278642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland#include <sys/types.h> 288642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland#include <string.h> 298642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 304605b3fb8a00fa37f617a8d0fe3a095d0503a845Raphael Moll#ifdef USE_MINGW 314605b3fb8a00fa37f617a8d0fe3a095d0503a845Raphael Moll#include <winsock2.h> 324605b3fb8a00fa37f617a8d0fe3a095d0503a845Raphael Moll#else 334605b3fb8a00fa37f617a8d0fe3a095d0503a845Raphael Moll#include <arpa/inet.h> 344605b3fb8a00fa37f617a8d0fe3a095d0503a845Raphael Moll#include <sys/ioctl.h> 354605b3fb8a00fa37f617a8d0fe3a095d0503a845Raphael Moll#endif 364605b3fb8a00fa37f617a8d0fe3a095d0503a845Raphael Moll 378642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland#if defined(__linux__) 388642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland#include <linux/fs.h> 398642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland#elif defined(__APPLE__) && defined(__MACH__) 408642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland#include <sys/disk.h> 418642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland#endif 428642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 438642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland#include "ext4.h" 448642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland#include "jbd2.h" 458642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 468642b7fba54727a38f751516bcdc452fb09ef610Brian Swetlandint force = 0; 478642b7fba54727a38f751516bcdc452fb09ef610Brian Swetlandstruct fs_info info; 488642b7fba54727a38f751516bcdc452fb09ef610Brian Swetlandstruct fs_aux_info aux_info; 498642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 502ae7663e1e064000356ee9e49ebd08bdddc545f9Ken Sumralljmp_buf setjmp_env; 512ae7663e1e064000356ee9e49ebd08bdddc545f9Ken Sumrall 528642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland/* returns 1 if a is a power of b */ 538642b7fba54727a38f751516bcdc452fb09ef610Brian Swetlandstatic int is_power_of(int a, int b) 548642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland{ 558642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland while (a > b) { 568642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland if (a % b) 578642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland return 0; 588642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland a /= b; 598642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland } 608642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 618642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland return (a == b) ? 1 : 0; 628642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland} 638642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 648642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland/* Returns 1 if the bg contains a backup superblock. On filesystems with 658642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland the sparse_super feature, only block groups 0, 1, and powers of 3, 5, 668642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland and 7 have backup superblocks. Otherwise, all block groups have backup 678642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland superblocks */ 688642b7fba54727a38f751516bcdc452fb09ef610Brian Swetlandint ext4_bg_has_super_block(int bg) 698642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland{ 708642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland /* Without sparse_super, every block group has a superblock */ 718642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland if (!(info.feat_ro_compat & EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER)) 728642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland return 1; 738642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 748642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland if (bg == 0 || bg == 1) 758642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland return 1; 768642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 778642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland if (is_power_of(bg, 3) || is_power_of(bg, 5) || is_power_of(bg, 7)) 788642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland return 1; 798642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 808642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland return 0; 818642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland} 828642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 838642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland/* Write the filesystem image to a file */ 84dc5abeee1e6fc4827ee0d5ece12aaed2dd56f4c7Colin Crossvoid write_ext4_image(int fd, int gz, int sparse, int crc) 858642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland{ 86f0ee37ffded79afdb03e15ae3a69969d2b7e6079Colin Cross sparse_file_write(info.sparse_file, fd, gz, sparse, crc); 878642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland} 888642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 898642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland/* Compute the rest of the parameters of the filesystem from the basic info */ 908642b7fba54727a38f751516bcdc452fb09ef610Brian Swetlandvoid ext4_create_fs_aux_info() 918642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland{ 928642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland aux_info.first_data_block = (info.block_size > 1024) ? 0 : 1; 938642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland aux_info.len_blocks = info.len / info.block_size; 948642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland aux_info.inode_table_blocks = DIV_ROUND_UP(info.inodes_per_group * info.inode_size, 958642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland info.block_size); 968642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland aux_info.groups = DIV_ROUND_UP(aux_info.len_blocks - aux_info.first_data_block, 978642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland info.blocks_per_group); 988642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland aux_info.blocks_per_ind = info.block_size / sizeof(u32); 998642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland aux_info.blocks_per_dind = aux_info.blocks_per_ind * aux_info.blocks_per_ind; 1008642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland aux_info.blocks_per_tind = aux_info.blocks_per_dind * aux_info.blocks_per_dind; 1018642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 1028642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland aux_info.bg_desc_blocks = 1038642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland DIV_ROUND_UP(aux_info.groups * sizeof(struct ext2_group_desc), 1048642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland info.block_size); 1058642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 1068642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland aux_info.default_i_flags = EXT4_NOATIME_FL; 1078642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 1088642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland u32 last_group_size = aux_info.len_blocks % info.blocks_per_group; 1098642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland u32 last_header_size = 2 + aux_info.inode_table_blocks; 1108642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland if (ext4_bg_has_super_block(aux_info.groups - 1)) 1118642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland last_header_size += 1 + aux_info.bg_desc_blocks + 11222742ce739a046a079b2e1b03342a25472dfa352Colin Cross info.bg_desc_reserve_blocks; 1138642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland if (last_group_size > 0 && last_group_size < last_header_size) { 1148642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland aux_info.groups--; 1158642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland aux_info.len_blocks -= last_group_size; 1168642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland } 1178642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 1188642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland aux_info.sb = calloc(info.block_size, 1); 119107a9f161babc20daf915311146b0e864d3b4157Ken Sumrall /* Alloc an array to hold the pointers to the backup superblocks */ 120107a9f161babc20daf915311146b0e864d3b4157Ken Sumrall aux_info.backup_sb = calloc(aux_info.groups, sizeof(char *)); 121107a9f161babc20daf915311146b0e864d3b4157Ken Sumrall 1228642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland if (!aux_info.sb) 1238642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland critical_error_errno("calloc"); 1248642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 1258642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland aux_info.bg_desc = calloc(info.block_size, aux_info.bg_desc_blocks); 1268642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland if (!aux_info.bg_desc) 1278642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland critical_error_errno("calloc"); 1288642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland} 1298642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 1308642b7fba54727a38f751516bcdc452fb09ef610Brian Swetlandvoid ext4_free_fs_aux_info() 1318642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland{ 132107a9f161babc20daf915311146b0e864d3b4157Ken Sumrall unsigned int i; 133107a9f161babc20daf915311146b0e864d3b4157Ken Sumrall 134107a9f161babc20daf915311146b0e864d3b4157Ken Sumrall for (i=0; i<aux_info.groups; i++) { 135107a9f161babc20daf915311146b0e864d3b4157Ken Sumrall if (aux_info.backup_sb[i]) 136107a9f161babc20daf915311146b0e864d3b4157Ken Sumrall free(aux_info.backup_sb[i]); 137107a9f161babc20daf915311146b0e864d3b4157Ken Sumrall } 1388642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland free(aux_info.sb); 1398642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland free(aux_info.bg_desc); 1408642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland} 1418642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 1428642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland/* Fill in the superblock memory buffer based on the filesystem parameters */ 1438642b7fba54727a38f751516bcdc452fb09ef610Brian Swetlandvoid ext4_fill_in_sb() 1448642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland{ 1458642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland unsigned int i; 1468642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland struct ext4_super_block *sb = aux_info.sb; 1478642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 1488642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_inodes_count = info.inodes_per_group * aux_info.groups; 1498642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_blocks_count_lo = aux_info.len_blocks; 1508642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_r_blocks_count_lo = 0; 1518642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_free_blocks_count_lo = 0; 1528642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_free_inodes_count = 0; 1538642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_first_data_block = aux_info.first_data_block; 1548642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_log_block_size = log_2(info.block_size / 1024); 1558642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_obso_log_frag_size = log_2(info.block_size / 1024); 1568642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_blocks_per_group = info.blocks_per_group; 1578642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_obso_frags_per_group = info.blocks_per_group; 1588642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_inodes_per_group = info.inodes_per_group; 1598642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_mtime = 0; 1608642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_wtime = 0; 1618642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_mnt_count = 0; 1628642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_max_mnt_count = 0xFFFF; 1638642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_magic = EXT4_SUPER_MAGIC; 1648642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_state = EXT4_VALID_FS; 1658642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_errors = EXT4_ERRORS_RO; 1668642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_minor_rev_level = 0; 1678642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_lastcheck = 0; 1688642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_checkinterval = 0; 1698642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_creator_os = EXT4_OS_LINUX; 1708642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_rev_level = EXT4_DYNAMIC_REV; 1718642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_def_resuid = EXT4_DEF_RESUID; 1728642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_def_resgid = EXT4_DEF_RESGID; 1738642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 1748642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 1758642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_inode_size = info.inode_size; 1768642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_block_group_nr = 0; 1778642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_feature_compat = info.feat_compat; 1788642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_feature_incompat = info.feat_incompat; 1798642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_feature_ro_compat = info.feat_ro_compat; 1808642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland generate_uuid("extandroid/make_ext4fs", info.label, sb->s_uuid); 1818642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name)); 1828642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland strncpy(sb->s_volume_name, info.label, sizeof(sb->s_volume_name)); 1838642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland memset(sb->s_last_mounted, 0, sizeof(sb->s_last_mounted)); 1848642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_algorithm_usage_bitmap = 0; 1858642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 18622742ce739a046a079b2e1b03342a25472dfa352Colin Cross sb->s_reserved_gdt_blocks = info.bg_desc_reserve_blocks; 1878642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_prealloc_blocks = 0; 1888642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_prealloc_dir_blocks = 0; 1898642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 1908642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland //memcpy(sb->s_journal_uuid, sb->s_uuid, sizeof(sb->s_journal_uuid)); 1918642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland if (info.feat_compat & EXT4_FEATURE_COMPAT_HAS_JOURNAL) 1928642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_journal_inum = EXT4_JOURNAL_INO; 1938642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_journal_dev = 0; 1948642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_last_orphan = 0; 1958642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_hash_seed[0] = 0; /* FIXME */ 1968642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_def_hash_version = DX_HASH_TEA; 1978642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_reserved_char_pad = EXT4_JNL_BACKUP_BLOCKS; 1988642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_desc_size = sizeof(struct ext2_group_desc); 1998642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_default_mount_opts = 0; /* FIXME */ 2008642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_first_meta_bg = 0; 2018642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_mkfs_time = 0; 2028642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland //sb->s_jnl_blocks[17]; /* FIXME */ 2038642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 2048642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_blocks_count_hi = aux_info.len_blocks >> 32; 2058642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_r_blocks_count_hi = 0; 2068642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_free_blocks_count_hi = 0; 2078642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_min_extra_isize = sizeof(struct ext4_inode) - 2088642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland EXT4_GOOD_OLD_INODE_SIZE; 2098642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_want_extra_isize = sizeof(struct ext4_inode) - 2108642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland EXT4_GOOD_OLD_INODE_SIZE; 2118642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_flags = 0; 2128642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_raid_stride = 0; 2138642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_mmp_interval = 0; 2148642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_mmp_block = 0; 2158642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_raid_stripe_width = 0; 2168642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_log_groups_per_flex = 0; 2178642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland sb->s_kbytes_written = 0; 2188642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 2198642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland for (i = 0; i < aux_info.groups; i++) { 2208642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland u64 group_start_block = aux_info.first_data_block + i * 2218642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland info.blocks_per_group; 2228642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland u32 header_size = 0; 2238642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland if (ext4_bg_has_super_block(i)) { 224107a9f161babc20daf915311146b0e864d3b4157Ken Sumrall if (i != 0) { 225107a9f161babc20daf915311146b0e864d3b4157Ken Sumrall aux_info.backup_sb[i] = calloc(info.block_size, 1); 226107a9f161babc20daf915311146b0e864d3b4157Ken Sumrall memcpy(aux_info.backup_sb[i], sb, info.block_size); 227107a9f161babc20daf915311146b0e864d3b4157Ken Sumrall /* Update the block group nr of this backup superblock */ 228107a9f161babc20daf915311146b0e864d3b4157Ken Sumrall aux_info.backup_sb[i]->s_block_group_nr = i; 229f0ee37ffded79afdb03e15ae3a69969d2b7e6079Colin Cross sparse_file_add_data(info.sparse_file, aux_info.backup_sb[i], 230f0ee37ffded79afdb03e15ae3a69969d2b7e6079Colin Cross info.block_size, group_start_block); 231107a9f161babc20daf915311146b0e864d3b4157Ken Sumrall } 232f0ee37ffded79afdb03e15ae3a69969d2b7e6079Colin Cross sparse_file_add_data(info.sparse_file, aux_info.bg_desc, 233b781330b1acae2e5706bbda8d81e5f7575f40e2aColin Cross aux_info.bg_desc_blocks * info.block_size, 234b781330b1acae2e5706bbda8d81e5f7575f40e2aColin Cross group_start_block + 1); 23522742ce739a046a079b2e1b03342a25472dfa352Colin Cross header_size = 1 + aux_info.bg_desc_blocks + info.bg_desc_reserve_blocks; 2368642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland } 2378642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 2388642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland aux_info.bg_desc[i].bg_block_bitmap = group_start_block + header_size; 2398642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland aux_info.bg_desc[i].bg_inode_bitmap = group_start_block + header_size + 1; 2408642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland aux_info.bg_desc[i].bg_inode_table = group_start_block + header_size + 2; 2418642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 2428642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland aux_info.bg_desc[i].bg_free_blocks_count = sb->s_blocks_per_group; 2438642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland aux_info.bg_desc[i].bg_free_inodes_count = sb->s_inodes_per_group; 2448642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland aux_info.bg_desc[i].bg_used_dirs_count = 0; 2458642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland } 2468642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland} 2478642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 248b781330b1acae2e5706bbda8d81e5f7575f40e2aColin Crossvoid ext4_queue_sb(void) 249b781330b1acae2e5706bbda8d81e5f7575f40e2aColin Cross{ 250b781330b1acae2e5706bbda8d81e5f7575f40e2aColin Cross /* The write_data* functions expect only block aligned calls. 251b781330b1acae2e5706bbda8d81e5f7575f40e2aColin Cross * This is not an issue, except when we write out the super 252b781330b1acae2e5706bbda8d81e5f7575f40e2aColin Cross * block on a system with a block size > 1K. So, we need to 253b781330b1acae2e5706bbda8d81e5f7575f40e2aColin Cross * deal with that here. 254b781330b1acae2e5706bbda8d81e5f7575f40e2aColin Cross */ 255b781330b1acae2e5706bbda8d81e5f7575f40e2aColin Cross if (info.block_size > 1024) { 256b781330b1acae2e5706bbda8d81e5f7575f40e2aColin Cross u8 *buf = calloc(info.block_size, 1); 257b781330b1acae2e5706bbda8d81e5f7575f40e2aColin Cross memcpy(buf + 1024, (u8*)aux_info.sb, 1024); 258f0ee37ffded79afdb03e15ae3a69969d2b7e6079Colin Cross sparse_file_add_data(info.sparse_file, buf, info.block_size, 0); 259b781330b1acae2e5706bbda8d81e5f7575f40e2aColin Cross } else { 260f0ee37ffded79afdb03e15ae3a69969d2b7e6079Colin Cross sparse_file_add_data(info.sparse_file, aux_info.sb, 1024, 1); 261b781330b1acae2e5706bbda8d81e5f7575f40e2aColin Cross } 262b781330b1acae2e5706bbda8d81e5f7575f40e2aColin Cross} 263b781330b1acae2e5706bbda8d81e5f7575f40e2aColin Cross 264a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Crossvoid ext4_parse_sb(struct ext4_super_block *sb) 265a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Cross{ 266a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Cross if (sb->s_magic != EXT4_SUPER_MAGIC) 267a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Cross error("superblock magic incorrect"); 268a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Cross 26997fc910ce0e05862888fd1d9e1938feba40f7539Ken Sumrall if ((sb->s_state & EXT4_VALID_FS) != EXT4_VALID_FS) 270a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Cross error("filesystem state not valid"); 271a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Cross 272a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Cross info.block_size = 1024 << sb->s_log_block_size; 273a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Cross info.blocks_per_group = sb->s_blocks_per_group; 274a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Cross info.inodes_per_group = sb->s_inodes_per_group; 275a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Cross info.inode_size = sb->s_inode_size; 276a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Cross info.inodes = sb->s_inodes_count; 277a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Cross info.feat_ro_compat = sb->s_feature_ro_compat; 278a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Cross info.feat_compat = sb->s_feature_compat; 279a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Cross info.feat_incompat = sb->s_feature_incompat; 280a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Cross info.bg_desc_reserve_blocks = sb->s_reserved_gdt_blocks; 281a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Cross info.label = sb->s_volume_name; 282a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Cross 283a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Cross aux_info.len_blocks = ((u64)sb->s_blocks_count_hi << 32) + 284a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Cross sb->s_blocks_count_lo; 285a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Cross info.len = (u64)info.block_size * aux_info.len_blocks; 286a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Cross 287a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Cross ext4_create_fs_aux_info(); 288a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Cross 289a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Cross memcpy(aux_info.sb, sb, sizeof(*sb)); 290a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Cross 291a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Cross if (aux_info.first_data_block != sb->s_first_data_block) 292a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Cross critical_error("first data block does not match"); 293a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Cross} 294a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Cross 2958642b7fba54727a38f751516bcdc452fb09ef610Brian Swetlandvoid ext4_create_resize_inode() 2968642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland{ 2978642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland struct block_allocation *reserve_inode_alloc = create_allocation(); 2988642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland u32 reserve_inode_len = 0; 2998642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland unsigned int i; 3008642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 3018642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland struct ext4_inode *inode = get_inode(EXT4_RESIZE_INO); 3028642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland if (inode == NULL) { 3038642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland error("failed to get resize inode"); 3048642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland return; 3058642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland } 3068642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 3078642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland for (i = 0; i < aux_info.groups; i++) { 3088642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland if (ext4_bg_has_super_block(i)) { 3098642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland u64 group_start_block = aux_info.first_data_block + i * 3108642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland info.blocks_per_group; 3118642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland u32 reserved_block_start = group_start_block + 1 + 3128642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland aux_info.bg_desc_blocks; 31322742ce739a046a079b2e1b03342a25472dfa352Colin Cross u32 reserved_block_len = info.bg_desc_reserve_blocks; 3148642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland append_region(reserve_inode_alloc, reserved_block_start, 3158642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland reserved_block_len, i); 3168642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland reserve_inode_len += reserved_block_len; 3178642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland } 3188642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland } 3198642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 3208642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland inode_attach_resize(inode, reserve_inode_alloc); 3218642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 3228642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland inode->i_mode = S_IFREG | S_IRUSR | S_IWUSR; 3238642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland inode->i_links_count = 1; 3248642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 3258642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland free_alloc(reserve_inode_alloc); 3268642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland} 3278642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 3288642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland/* Allocate the blocks to hold a journal inode and connect them to the 3298642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland reserved journal inode */ 3308642b7fba54727a38f751516bcdc452fb09ef610Brian Swetlandvoid ext4_create_journal_inode() 3318642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland{ 3328642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland struct ext4_inode *inode = get_inode(EXT4_JOURNAL_INO); 3338642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland if (inode == NULL) { 3348642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland error("failed to get journal inode"); 3358642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland return; 3368642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland } 3378642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 3388642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland u8 *journal_data = inode_allocate_data_extents(inode, 3398642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland info.journal_blocks * info.block_size, 3404b8b59a7cd0e1413dcf9973c4bbd7eb65a444c4cBrian Swetland info.journal_blocks * info.block_size); 3418642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland if (!journal_data) { 3428642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland error("failed to allocate extents for journal data"); 3438642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland return; 3448642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland } 3458642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 3468642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland inode->i_mode = S_IFREG | S_IRUSR | S_IWUSR; 3478642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland inode->i_links_count = 1; 3488642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 3498642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland journal_superblock_t *jsb = (journal_superblock_t *)journal_data; 3508642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland jsb->s_header.h_magic = htonl(JBD2_MAGIC_NUMBER); 3518642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland jsb->s_header.h_blocktype = htonl(JBD2_SUPERBLOCK_V2); 3528642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland jsb->s_blocksize = htonl(info.block_size); 3538642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland jsb->s_maxlen = htonl(info.journal_blocks); 3548642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland jsb->s_nr_users = htonl(1); 3558642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland jsb->s_first = htonl(1); 3568642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland jsb->s_sequence = htonl(1); 3578642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 3588642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland memcpy(aux_info.sb->s_jnl_blocks, &inode->i_block, sizeof(inode->i_block)); 3598642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland} 3608642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 3618642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland/* Update the number of free blocks and inodes in the filesystem and in each 3628642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland block group */ 3638642b7fba54727a38f751516bcdc452fb09ef610Brian Swetlandvoid ext4_update_free() 3648642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland{ 3658642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland unsigned int i; 3668642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 3678642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland for (i = 0; i < aux_info.groups; i++) { 3688642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland u32 bg_free_blocks = get_free_blocks(i); 3698642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland u32 bg_free_inodes = get_free_inodes(i); 3708642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 3718642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland aux_info.bg_desc[i].bg_free_blocks_count = bg_free_blocks; 3728642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland aux_info.sb->s_free_blocks_count_lo += bg_free_blocks; 3738642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 3748642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland aux_info.bg_desc[i].bg_free_inodes_count = bg_free_inodes; 3758642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland aux_info.sb->s_free_inodes_count += bg_free_inodes; 3768642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 3778642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland aux_info.bg_desc[i].bg_used_dirs_count += get_directories(i); 3788642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland } 3798642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland} 3808642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 3810349bd9f14d252673a7a25767da4a80121aaaaf2Anatol Pomazaustatic u64 get_block_device_size(int fd) 3828642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland{ 3838642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland u64 size = 0; 3848642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland int ret; 3858642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 3868642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland#if defined(__linux__) 3878642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland ret = ioctl(fd, BLKGETSIZE64, &size); 3888642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland#elif defined(__APPLE__) && defined(__MACH__) 3898642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland ret = ioctl(fd, DKIOCGETBLOCKCOUNT, &size); 3908642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland#else 3910a5b2a30ff134958d028e995b4e4cb9cf9021bd9Robert CH Chou close(fd); 3928642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland return 0; 3938642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland#endif 3948642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 3958642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland if (ret) 3968642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland return 0; 3978642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 3988642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland return size; 3998642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland} 4008642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 4010349bd9f14d252673a7a25767da4a80121aaaaf2Anatol Pomazauu64 get_file_size(int fd) 4028642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland{ 4038642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland struct stat buf; 4048642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland int ret; 405435a8b61e925e3efb22fce08612efe210e83f791Ken Sumrall u64 reserve_len = 0; 406435a8b61e925e3efb22fce08612efe210e83f791Ken Sumrall s64 computed_size; 4078642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 4080349bd9f14d252673a7a25767da4a80121aaaaf2Anatol Pomazau ret = fstat(fd, &buf); 4098642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland if (ret) 4108642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland return 0; 4118642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 412435a8b61e925e3efb22fce08612efe210e83f791Ken Sumrall if (info.len < 0) 413435a8b61e925e3efb22fce08612efe210e83f791Ken Sumrall reserve_len = -info.len; 414435a8b61e925e3efb22fce08612efe210e83f791Ken Sumrall 4158642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland if (S_ISREG(buf.st_mode)) 416435a8b61e925e3efb22fce08612efe210e83f791Ken Sumrall computed_size = buf.st_size - reserve_len; 4178642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland else if (S_ISBLK(buf.st_mode)) 4180349bd9f14d252673a7a25767da4a80121aaaaf2Anatol Pomazau computed_size = get_block_device_size(fd) - reserve_len; 4198642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland else 420435a8b61e925e3efb22fce08612efe210e83f791Ken Sumrall computed_size = 0; 421435a8b61e925e3efb22fce08612efe210e83f791Ken Sumrall 422435a8b61e925e3efb22fce08612efe210e83f791Ken Sumrall if (computed_size < 0) { 423435a8b61e925e3efb22fce08612efe210e83f791Ken Sumrall warn("Computed filesystem size less than 0"); 424435a8b61e925e3efb22fce08612efe210e83f791Ken Sumrall computed_size = 0; 425435a8b61e925e3efb22fce08612efe210e83f791Ken Sumrall } 426435a8b61e925e3efb22fce08612efe210e83f791Ken Sumrall 427435a8b61e925e3efb22fce08612efe210e83f791Ken Sumrall return computed_size; 4288642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland} 4298642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 4308642b7fba54727a38f751516bcdc452fb09ef610Brian Swetlandu64 parse_num(const char *arg) 4318642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland{ 4328642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland char *endptr; 4338642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland u64 num = strtoull(arg, &endptr, 10); 4348642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland if (*endptr == 'k' || *endptr == 'K') 4358642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland num *= 1024LL; 4368642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland else if (*endptr == 'm' || *endptr == 'M') 4378642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland num *= 1024LL * 1024LL; 4388642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland else if (*endptr == 'g' || *endptr == 'G') 4398642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland num *= 1024LL * 1024LL * 1024LL; 4408642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland 4418642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland return num; 4428642b7fba54727a38f751516bcdc452fb09ef610Brian Swetland} 443