1671cd2188e2f224aaeac4955785199f228235719Ken Sumrall/* 2671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * Copyright (C) 2010 The Android Open Source Project 3671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * 4671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * Licensed under the Apache License, Version 2.0 (the "License"); 5671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * you may not use this file except in compliance with the License. 6671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * You may obtain a copy of the License at 7671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * 8671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * http://www.apache.org/licenses/LICENSE-2.0 9671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * 10671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * Unless required by applicable law or agreed to in writing, software 11671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * distributed under the License is distributed on an "AS IS" BASIS, 12671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * See the License for the specific language governing permissions and 14671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * limitations under the License. 15671cd2188e2f224aaeac4955785199f228235719Ken Sumrall */ 16671cd2188e2f224aaeac4955785199f228235719Ken Sumrall#include "ext4_utils.h" 17671cd2188e2f224aaeac4955785199f228235719Ken Sumrall#include "make_ext4fs.h" 18671cd2188e2f224aaeac4955785199f228235719Ken Sumrall#include "ext4_extents.h" 19671cd2188e2f224aaeac4955785199f228235719Ken Sumrall#include "allocate.h" 20671cd2188e2f224aaeac4955785199f228235719Ken Sumrall#include "ext4fixup.h" 21671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 22dc5abeee1e6fc4827ee0d5ece12aaed2dd56f4c7Colin Cross#include <sparse/sparse.h> 23dc5abeee1e6fc4827ee0d5ece12aaed2dd56f4c7Colin Cross 24671cd2188e2f224aaeac4955785199f228235719Ken Sumrall#include <sys/types.h> 25671cd2188e2f224aaeac4955785199f228235719Ken Sumrall#include <sys/stat.h> 26671cd2188e2f224aaeac4955785199f228235719Ken Sumrall#include <sys/types.h> 27671cd2188e2f224aaeac4955785199f228235719Ken Sumrall#include <fcntl.h> 28671cd2188e2f224aaeac4955785199f228235719Ken Sumrall#include <unistd.h> 29671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 304605b3fb8a00fa37f617a8d0fe3a095d0503a845Raphael Moll#ifndef USE_MINGW 314605b3fb8a00fa37f617a8d0fe3a095d0503a845Raphael Moll#include <sys/mman.h> 324605b3fb8a00fa37f617a8d0fe3a095d0503a845Raphael Moll#endif 334605b3fb8a00fa37f617a8d0fe3a095d0503a845Raphael Moll 34671cd2188e2f224aaeac4955785199f228235719Ken Sumrall#if defined(__APPLE__) && defined(__MACH__) 35671cd2188e2f224aaeac4955785199f228235719Ken Sumrall#define lseek64 lseek 36671cd2188e2f224aaeac4955785199f228235719Ken Sumrall#define off64_t off_t 37671cd2188e2f224aaeac4955785199f228235719Ken Sumrall#endif 38671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 39671cd2188e2f224aaeac4955785199f228235719Ken Sumrall/* The inode block count for a file/directory is in units of 512 byte blocks, 40671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * _NOT_ the filesystem block size! 41671cd2188e2f224aaeac4955785199f228235719Ken Sumrall */ 42671cd2188e2f224aaeac4955785199f228235719Ken Sumrall#define INODE_BLOCK_SIZE 512 43671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 44671cd2188e2f224aaeac4955785199f228235719Ken Sumrall#define MAX_EXT4_BLOCK_SIZE 4096 45671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 46671cd2188e2f224aaeac4955785199f228235719Ken Sumrall/* The two modes the recurse_dir() can be in */ 47671cd2188e2f224aaeac4955785199f228235719Ken Sumrall#define SANITY_CHECK_PASS 1 48671cd2188e2f224aaeac4955785199f228235719Ken Sumrall#define MARK_INODE_NUMS 2 49671cd2188e2f224aaeac4955785199f228235719Ken Sumrall#define UPDATE_INODE_NUMS 3 50671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 51671cd2188e2f224aaeac4955785199f228235719Ken Sumrall/* Magic numbers to indicate what state the update process is in */ 52671cd2188e2f224aaeac4955785199f228235719Ken Sumrall#define MAGIC_STATE_MARKING_INUMS 0x7000151515565512ll 53671cd2188e2f224aaeac4955785199f228235719Ken Sumrall#define MAGIC_STATE_UPDATING_INUMS 0x6121131211735123ll 54671cd2188e2f224aaeac4955785199f228235719Ken Sumrall#define MAGIC_STATE_UPDATING_SB 0x15e1715151558477ll 55671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 56671cd2188e2f224aaeac4955785199f228235719Ken Sumrall/* Internal state variables corresponding to the magic numbers */ 57671cd2188e2f224aaeac4955785199f228235719Ken Sumrall#define STATE_UNSET 0 58671cd2188e2f224aaeac4955785199f228235719Ken Sumrall#define STATE_MARKING_INUMS 1 59671cd2188e2f224aaeac4955785199f228235719Ken Sumrall#define STATE_UPDATING_INUMS 2 60671cd2188e2f224aaeac4955785199f228235719Ken Sumrall#define STATE_UPDATING_SB 3 61671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 627e5ff13c55eb29748c07768bd7134819cbcbd4b0Ken Sumrall/* Used for automated testing of this programs ability to stop and be restarted wthout error */ 637e5ff13c55eb29748c07768bd7134819cbcbd4b0Ken Sumrallstatic int bail_phase = 0; 647e5ff13c55eb29748c07768bd7134819cbcbd4b0Ken Sumrallstatic int bail_loc = 0; 657e5ff13c55eb29748c07768bd7134819cbcbd4b0Ken Sumrallstatic int bail_count = 0; 667e5ff13c55eb29748c07768bd7134819cbcbd4b0Ken Sumrallstatic int count = 0; 677e5ff13c55eb29748c07768bd7134819cbcbd4b0Ken Sumrall 6897fc910ce0e05862888fd1d9e1938feba40f7539Ken Sumrall/* global flags */ 69671cd2188e2f224aaeac4955785199f228235719Ken Sumrallstatic int verbose = 0; 70671cd2188e2f224aaeac4955785199f228235719Ken Sumrallstatic int no_write = 0; 7197fc910ce0e05862888fd1d9e1938feba40f7539Ken Sumrall 72671cd2188e2f224aaeac4955785199f228235719Ken Sumrallstatic int new_inodes_per_group = 0; 7397fc910ce0e05862888fd1d9e1938feba40f7539Ken Sumrall 74671cd2188e2f224aaeac4955785199f228235719Ken Sumrallstatic int no_write_fixup_state = 0; 75671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 76671cd2188e2f224aaeac4955785199f228235719Ken Sumrallstatic int compute_new_inum(unsigned int old_inum) 77671cd2188e2f224aaeac4955785199f228235719Ken Sumrall{ 78671cd2188e2f224aaeac4955785199f228235719Ken Sumrall unsigned int group, offset; 79671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 8097fc910ce0e05862888fd1d9e1938feba40f7539Ken Sumrall group = (old_inum - 1) / info.inodes_per_group; 8197fc910ce0e05862888fd1d9e1938feba40f7539Ken Sumrall offset = (old_inum -1) % info.inodes_per_group; 82671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 8397fc910ce0e05862888fd1d9e1938feba40f7539Ken Sumrall return (group * new_inodes_per_group) + offset + 1; 84671cd2188e2f224aaeac4955785199f228235719Ken Sumrall} 85671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 86671cd2188e2f224aaeac4955785199f228235719Ken Sumrallstatic int get_fs_fixup_state(int fd) 87671cd2188e2f224aaeac4955785199f228235719Ken Sumrall{ 88671cd2188e2f224aaeac4955785199f228235719Ken Sumrall unsigned long long magic; 89671cd2188e2f224aaeac4955785199f228235719Ken Sumrall int ret, len; 90671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 91671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (no_write) { 92671cd2188e2f224aaeac4955785199f228235719Ken Sumrall return no_write_fixup_state; 93671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 94671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 95671cd2188e2f224aaeac4955785199f228235719Ken Sumrall lseek64(fd, 0, SEEK_SET); 96671cd2188e2f224aaeac4955785199f228235719Ken Sumrall len = read(fd, &magic, sizeof(magic)); 97671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (len != sizeof(magic)) { 98671cd2188e2f224aaeac4955785199f228235719Ken Sumrall critical_error("cannot read fixup_state\n"); 99671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 100671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 101671cd2188e2f224aaeac4955785199f228235719Ken Sumrall switch (magic) { 102671cd2188e2f224aaeac4955785199f228235719Ken Sumrall case MAGIC_STATE_MARKING_INUMS: 103671cd2188e2f224aaeac4955785199f228235719Ken Sumrall ret = STATE_MARKING_INUMS; 104671cd2188e2f224aaeac4955785199f228235719Ken Sumrall break; 105671cd2188e2f224aaeac4955785199f228235719Ken Sumrall case MAGIC_STATE_UPDATING_INUMS: 106671cd2188e2f224aaeac4955785199f228235719Ken Sumrall ret = STATE_UPDATING_INUMS; 107671cd2188e2f224aaeac4955785199f228235719Ken Sumrall break; 108671cd2188e2f224aaeac4955785199f228235719Ken Sumrall case MAGIC_STATE_UPDATING_SB: 109671cd2188e2f224aaeac4955785199f228235719Ken Sumrall ret = STATE_UPDATING_SB; 110671cd2188e2f224aaeac4955785199f228235719Ken Sumrall break; 111671cd2188e2f224aaeac4955785199f228235719Ken Sumrall default: 112671cd2188e2f224aaeac4955785199f228235719Ken Sumrall ret = STATE_UNSET; 113671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 114671cd2188e2f224aaeac4955785199f228235719Ken Sumrall return ret; 115671cd2188e2f224aaeac4955785199f228235719Ken Sumrall} 116671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 117671cd2188e2f224aaeac4955785199f228235719Ken Sumrallstatic int set_fs_fixup_state(int fd, int state) 118671cd2188e2f224aaeac4955785199f228235719Ken Sumrall{ 119671cd2188e2f224aaeac4955785199f228235719Ken Sumrall unsigned long long magic; 120671cd2188e2f224aaeac4955785199f228235719Ken Sumrall struct ext4_super_block sb; 121671cd2188e2f224aaeac4955785199f228235719Ken Sumrall int len; 122671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 123671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (no_write) { 124671cd2188e2f224aaeac4955785199f228235719Ken Sumrall no_write_fixup_state = state; 125671cd2188e2f224aaeac4955785199f228235719Ken Sumrall return 0; 126671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 127671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 128671cd2188e2f224aaeac4955785199f228235719Ken Sumrall switch (state) { 129671cd2188e2f224aaeac4955785199f228235719Ken Sumrall case STATE_MARKING_INUMS: 130671cd2188e2f224aaeac4955785199f228235719Ken Sumrall magic = MAGIC_STATE_MARKING_INUMS; 131671cd2188e2f224aaeac4955785199f228235719Ken Sumrall break; 132671cd2188e2f224aaeac4955785199f228235719Ken Sumrall case STATE_UPDATING_INUMS: 133671cd2188e2f224aaeac4955785199f228235719Ken Sumrall magic = MAGIC_STATE_UPDATING_INUMS; 134671cd2188e2f224aaeac4955785199f228235719Ken Sumrall break; 135671cd2188e2f224aaeac4955785199f228235719Ken Sumrall case STATE_UPDATING_SB: 136671cd2188e2f224aaeac4955785199f228235719Ken Sumrall magic = MAGIC_STATE_UPDATING_SB; 137671cd2188e2f224aaeac4955785199f228235719Ken Sumrall break; 138671cd2188e2f224aaeac4955785199f228235719Ken Sumrall case STATE_UNSET: 139671cd2188e2f224aaeac4955785199f228235719Ken Sumrall default: 140671cd2188e2f224aaeac4955785199f228235719Ken Sumrall magic = 0ll; 141671cd2188e2f224aaeac4955785199f228235719Ken Sumrall break; 142671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 143671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 144671cd2188e2f224aaeac4955785199f228235719Ken Sumrall lseek64(fd, 0, SEEK_SET); 145671cd2188e2f224aaeac4955785199f228235719Ken Sumrall len = write(fd, &magic, sizeof(magic)); 146671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (len != sizeof(magic)) { 147671cd2188e2f224aaeac4955785199f228235719Ken Sumrall critical_error("cannot write fixup_state\n"); 148671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 149671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 150671cd2188e2f224aaeac4955785199f228235719Ken Sumrall read_sb(fd, &sb); 151671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (magic) { 152671cd2188e2f224aaeac4955785199f228235719Ken Sumrall /* If we are in the process of updating the filesystem, make it unmountable */ 153671cd2188e2f224aaeac4955785199f228235719Ken Sumrall sb.s_desc_size |= 1; 154671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } else { 155671cd2188e2f224aaeac4955785199f228235719Ken Sumrall /* we are done, so make the filesystem mountable again */ 156671cd2188e2f224aaeac4955785199f228235719Ken Sumrall sb.s_desc_size &= ~1; 157671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 158671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 159ee2bba62529ce544a60d141ca10a37407c03ab1ePaul Lawrence if (!no_write) { 160ee2bba62529ce544a60d141ca10a37407c03ab1ePaul Lawrence write_sb(fd, 1024, &sb); 161671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 162671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 163671cd2188e2f224aaeac4955785199f228235719Ken Sumrall return 0; 164671cd2188e2f224aaeac4955785199f228235719Ken Sumrall} 165671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 166671cd2188e2f224aaeac4955785199f228235719Ken Sumrallstatic int read_inode(int fd, unsigned int inum, struct ext4_inode *inode) 167671cd2188e2f224aaeac4955785199f228235719Ken Sumrall{ 168671cd2188e2f224aaeac4955785199f228235719Ken Sumrall unsigned int bg_num, bg_offset; 169671cd2188e2f224aaeac4955785199f228235719Ken Sumrall off64_t inode_offset; 170671cd2188e2f224aaeac4955785199f228235719Ken Sumrall int len; 171671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 172671cd2188e2f224aaeac4955785199f228235719Ken Sumrall bg_num = (inum-1) / info.inodes_per_group; 173671cd2188e2f224aaeac4955785199f228235719Ken Sumrall bg_offset = (inum-1) % info.inodes_per_group; 174671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 175671cd2188e2f224aaeac4955785199f228235719Ken Sumrall inode_offset = ((unsigned long long)aux_info.bg_desc[bg_num].bg_inode_table * info.block_size) + 176671cd2188e2f224aaeac4955785199f228235719Ken Sumrall (bg_offset * info.inode_size); 177671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 178671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (lseek64(fd, inode_offset, SEEK_SET) < 0) { 179671cd2188e2f224aaeac4955785199f228235719Ken Sumrall critical_error_errno("failed to seek to inode %d\n", inum); 180671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 181671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 182671cd2188e2f224aaeac4955785199f228235719Ken Sumrall len=read(fd, inode, sizeof(*inode)); 183671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (len != sizeof(*inode)) { 184671cd2188e2f224aaeac4955785199f228235719Ken Sumrall critical_error_errno("failed to read inode %d\n", inum); 185671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 186671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 187671cd2188e2f224aaeac4955785199f228235719Ken Sumrall return 0; 188671cd2188e2f224aaeac4955785199f228235719Ken Sumrall} 189671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 190671cd2188e2f224aaeac4955785199f228235719Ken Sumrallstatic int read_block(int fd, unsigned long long block_num, void *block) 191671cd2188e2f224aaeac4955785199f228235719Ken Sumrall{ 192671cd2188e2f224aaeac4955785199f228235719Ken Sumrall off64_t off; 193671cd2188e2f224aaeac4955785199f228235719Ken Sumrall unsigned int len; 194671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 195671cd2188e2f224aaeac4955785199f228235719Ken Sumrall off = block_num * info.block_size; 196671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 197671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (lseek64(fd, off, SEEK_SET) , 0) { 198671cd2188e2f224aaeac4955785199f228235719Ken Sumrall critical_error_errno("failed to seek to block %lld\n", block_num); 199671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 200671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 201671cd2188e2f224aaeac4955785199f228235719Ken Sumrall len=read(fd, block, info.block_size); 202671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (len != info.block_size) { 203671cd2188e2f224aaeac4955785199f228235719Ken Sumrall critical_error_errno("failed to read block %lld\n", block_num); 204671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 205671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 206671cd2188e2f224aaeac4955785199f228235719Ken Sumrall return 0; 207671cd2188e2f224aaeac4955785199f228235719Ken Sumrall} 208671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 209671cd2188e2f224aaeac4955785199f228235719Ken Sumrallstatic int write_block(int fd, unsigned long long block_num, void *block) 210671cd2188e2f224aaeac4955785199f228235719Ken Sumrall{ 211671cd2188e2f224aaeac4955785199f228235719Ken Sumrall off64_t off; 212671cd2188e2f224aaeac4955785199f228235719Ken Sumrall unsigned int len; 213671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 214671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (no_write) { 215671cd2188e2f224aaeac4955785199f228235719Ken Sumrall return 0; 216671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 217671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 218671cd2188e2f224aaeac4955785199f228235719Ken Sumrall off = block_num * info.block_size; 219671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 220671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (lseek64(fd, off, SEEK_SET) < 0) { 221671cd2188e2f224aaeac4955785199f228235719Ken Sumrall critical_error_errno("failed to seek to block %lld\n", block_num); 222671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 223671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 224671cd2188e2f224aaeac4955785199f228235719Ken Sumrall len=write(fd, block, info.block_size); 225671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (len != info.block_size) { 226671cd2188e2f224aaeac4955785199f228235719Ken Sumrall critical_error_errno("failed to write block %lld\n", block_num); 227671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 228671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 229671cd2188e2f224aaeac4955785199f228235719Ken Sumrall return 0; 230671cd2188e2f224aaeac4955785199f228235719Ken Sumrall} 231671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 232671cd2188e2f224aaeac4955785199f228235719Ken Sumrallstatic void check_inode_bitmap(int fd, unsigned int bg_num) 233671cd2188e2f224aaeac4955785199f228235719Ken Sumrall{ 234671cd2188e2f224aaeac4955785199f228235719Ken Sumrall unsigned int inode_bitmap_block_num; 235671cd2188e2f224aaeac4955785199f228235719Ken Sumrall unsigned char block[MAX_EXT4_BLOCK_SIZE]; 236671cd2188e2f224aaeac4955785199f228235719Ken Sumrall int i, bitmap_updated = 0; 237671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 238671cd2188e2f224aaeac4955785199f228235719Ken Sumrall /* Using the bg_num, aux_info.bg_desc[], info.inodes_per_group and 239671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * new_inodes_per_group, retrieve the inode bitmap, and make sure 240671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * the bits between the old and new size are clear 241671cd2188e2f224aaeac4955785199f228235719Ken Sumrall */ 242671cd2188e2f224aaeac4955785199f228235719Ken Sumrall inode_bitmap_block_num = aux_info.bg_desc[bg_num].bg_inode_bitmap; 243671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 244671cd2188e2f224aaeac4955785199f228235719Ken Sumrall read_block(fd, inode_bitmap_block_num, block); 245671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 246671cd2188e2f224aaeac4955785199f228235719Ken Sumrall for (i = info.inodes_per_group; i < new_inodes_per_group; i++) { 247671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (bitmap_get_bit(block, i)) { 248671cd2188e2f224aaeac4955785199f228235719Ken Sumrall bitmap_clear_bit(block, i); 249671cd2188e2f224aaeac4955785199f228235719Ken Sumrall bitmap_updated = 1; 250671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 251671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 252671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 253671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (bitmap_updated) { 254671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (verbose) { 255671cd2188e2f224aaeac4955785199f228235719Ken Sumrall printf("Warning: updated inode bitmap for block group %d\n", bg_num); 256671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 257671cd2188e2f224aaeac4955785199f228235719Ken Sumrall write_block(fd, inode_bitmap_block_num, block); 258671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 259671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 260671cd2188e2f224aaeac4955785199f228235719Ken Sumrall return; 261671cd2188e2f224aaeac4955785199f228235719Ken Sumrall} 262671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 263671cd2188e2f224aaeac4955785199f228235719Ken Sumrall/* Update the superblock and bgdesc of the specified block group */ 264671cd2188e2f224aaeac4955785199f228235719Ken Sumrallstatic int update_superblocks_and_bg_desc(int fd, int state) 265671cd2188e2f224aaeac4955785199f228235719Ken Sumrall{ 266671cd2188e2f224aaeac4955785199f228235719Ken Sumrall off64_t ret; 267671cd2188e2f224aaeac4955785199f228235719Ken Sumrall struct ext4_super_block sb; 268671cd2188e2f224aaeac4955785199f228235719Ken Sumrall unsigned int num_block_groups, total_new_inodes; 269671cd2188e2f224aaeac4955785199f228235719Ken Sumrall unsigned int i; 270671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 271671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 272671cd2188e2f224aaeac4955785199f228235719Ken Sumrall read_sb(fd, &sb); 273671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 274671cd2188e2f224aaeac4955785199f228235719Ken Sumrall /* Compute how many more inodes are now available */ 275671cd2188e2f224aaeac4955785199f228235719Ken Sumrall num_block_groups = DIV_ROUND_UP(aux_info.len_blocks, info.blocks_per_group); 276671cd2188e2f224aaeac4955785199f228235719Ken Sumrall total_new_inodes = num_block_groups * (new_inodes_per_group - sb.s_inodes_per_group); 277671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 278671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (verbose) { 279671cd2188e2f224aaeac4955785199f228235719Ken Sumrall printf("created %d additional inodes\n", total_new_inodes); 280671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 281671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 282671cd2188e2f224aaeac4955785199f228235719Ken Sumrall /* Update the free inodes count in each block group descriptor */ 283671cd2188e2f224aaeac4955785199f228235719Ken Sumrall for (i = 0; i < num_block_groups; i++) { 284671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (state == STATE_UPDATING_SB) { 285671cd2188e2f224aaeac4955785199f228235719Ken Sumrall aux_info.bg_desc[i].bg_free_inodes_count += (new_inodes_per_group - sb.s_inodes_per_group); 286671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 287671cd2188e2f224aaeac4955785199f228235719Ken Sumrall check_inode_bitmap(fd, i); 288671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 289671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 290671cd2188e2f224aaeac4955785199f228235719Ken Sumrall /* First some sanity checks */ 291671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if ((sb.s_inodes_count + total_new_inodes) != (new_inodes_per_group * num_block_groups)) { 292671cd2188e2f224aaeac4955785199f228235719Ken Sumrall critical_error("Failed sanity check on new inode count\n"); 293671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 294671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (new_inodes_per_group % (info.block_size/info.inode_size)) { 295671cd2188e2f224aaeac4955785199f228235719Ken Sumrall critical_error("Failed sanity check on new inode per group alignment\n"); 296671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 297671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 298671cd2188e2f224aaeac4955785199f228235719Ken Sumrall /* Update the free inodes count in the superblock */ 299671cd2188e2f224aaeac4955785199f228235719Ken Sumrall sb.s_inodes_count += total_new_inodes; 300671cd2188e2f224aaeac4955785199f228235719Ken Sumrall sb.s_free_inodes_count += total_new_inodes; 301671cd2188e2f224aaeac4955785199f228235719Ken Sumrall sb.s_inodes_per_group = new_inodes_per_group; 302671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 303671cd2188e2f224aaeac4955785199f228235719Ken Sumrall for (i = 0; i < aux_info.groups; i++) { 304671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (ext4_bg_has_super_block(i)) { 305671cd2188e2f224aaeac4955785199f228235719Ken Sumrall unsigned int sb_offset; 306671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 307671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (i == 0) { 308671cd2188e2f224aaeac4955785199f228235719Ken Sumrall /* The first superblock is offset by 1K to leave room for boot sectors */ 309671cd2188e2f224aaeac4955785199f228235719Ken Sumrall sb_offset = 1024; 310671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } else { 311671cd2188e2f224aaeac4955785199f228235719Ken Sumrall sb_offset = 0; 312671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 313671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 314671cd2188e2f224aaeac4955785199f228235719Ken Sumrall sb.s_block_group_nr = i; 315671cd2188e2f224aaeac4955785199f228235719Ken Sumrall /* Don't write out the backup superblocks with the bit set in the s_desc_size 316671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * which prevents the filesystem from mounting. The bit for the primary 317671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * superblock will be cleared on the final call to set_fs_fixup_state() */ 318671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (i != 0) { 319671cd2188e2f224aaeac4955785199f228235719Ken Sumrall sb.s_desc_size &= ~1; 320671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 321671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 322ee2bba62529ce544a60d141ca10a37407c03ab1ePaul Lawrence if (!no_write) { 323ee2bba62529ce544a60d141ca10a37407c03ab1ePaul Lawrence write_sb(fd, 324ee2bba62529ce544a60d141ca10a37407c03ab1ePaul Lawrence (unsigned long long)i 325ee2bba62529ce544a60d141ca10a37407c03ab1ePaul Lawrence * info.blocks_per_group * info.block_size 326ee2bba62529ce544a60d141ca10a37407c03ab1ePaul Lawrence + sb_offset, 327ee2bba62529ce544a60d141ca10a37407c03ab1ePaul Lawrence &sb); 328ee2bba62529ce544a60d141ca10a37407c03ab1ePaul Lawrence } 329671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 330671cd2188e2f224aaeac4955785199f228235719Ken Sumrall ret = lseek64(fd, ((unsigned long long)i * info.blocks_per_group * info.block_size) + 331671cd2188e2f224aaeac4955785199f228235719Ken Sumrall (info.block_size * (aux_info.first_data_block + 1)), SEEK_SET); 332671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (ret < 0) 333671cd2188e2f224aaeac4955785199f228235719Ken Sumrall critical_error_errno("failed to seek to block group descriptors"); 334671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 335671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (!no_write) { 336671cd2188e2f224aaeac4955785199f228235719Ken Sumrall ret = write(fd, aux_info.bg_desc, info.block_size * aux_info.bg_desc_blocks); 337671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (ret < 0) 338671cd2188e2f224aaeac4955785199f228235719Ken Sumrall critical_error_errno("failed to write block group descriptors"); 339671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (ret != (int)info.block_size * (int)aux_info.bg_desc_blocks) 340671cd2188e2f224aaeac4955785199f228235719Ken Sumrall critical_error("failed to write all of block group descriptors"); 341671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 342671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 3437e5ff13c55eb29748c07768bd7134819cbcbd4b0Ken Sumrall if ((bail_phase == 4) && ((unsigned int)bail_count == i)) { 3447e5ff13c55eb29748c07768bd7134819cbcbd4b0Ken Sumrall critical_error("bailing at phase 4\n"); 3457e5ff13c55eb29748c07768bd7134819cbcbd4b0Ken Sumrall } 346671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 347671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 348671cd2188e2f224aaeac4955785199f228235719Ken Sumrall return 0; 349671cd2188e2f224aaeac4955785199f228235719Ken Sumrall} 350671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 351671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 352671cd2188e2f224aaeac4955785199f228235719Ken Sumrallstatic int get_direct_blocks(struct ext4_inode *inode, unsigned long long *block_list, 353671cd2188e2f224aaeac4955785199f228235719Ken Sumrall unsigned int *count) 354671cd2188e2f224aaeac4955785199f228235719Ken Sumrall{ 355671cd2188e2f224aaeac4955785199f228235719Ken Sumrall unsigned int i = 0; 356671cd2188e2f224aaeac4955785199f228235719Ken Sumrall unsigned int ret = 0; 357671cd2188e2f224aaeac4955785199f228235719Ken Sumrall unsigned int sectors_per_block; 358671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 359671cd2188e2f224aaeac4955785199f228235719Ken Sumrall sectors_per_block = info.block_size / INODE_BLOCK_SIZE; 360671cd2188e2f224aaeac4955785199f228235719Ken Sumrall while ((i < (inode->i_blocks_lo / sectors_per_block)) && (i < EXT4_NDIR_BLOCKS)) { 361671cd2188e2f224aaeac4955785199f228235719Ken Sumrall block_list[i] = inode->i_block[i]; 362671cd2188e2f224aaeac4955785199f228235719Ken Sumrall i++; 363671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 364671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 365671cd2188e2f224aaeac4955785199f228235719Ken Sumrall *count += i; 366671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 367671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if ((inode->i_blocks_lo / sectors_per_block) > EXT4_NDIR_BLOCKS) { 368671cd2188e2f224aaeac4955785199f228235719Ken Sumrall ret = 1; 369671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 370671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 371671cd2188e2f224aaeac4955785199f228235719Ken Sumrall return ret; 372671cd2188e2f224aaeac4955785199f228235719Ken Sumrall} 373671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 374671cd2188e2f224aaeac4955785199f228235719Ken Sumrallstatic int get_indirect_blocks(int fd, struct ext4_inode *inode, 375671cd2188e2f224aaeac4955785199f228235719Ken Sumrall unsigned long long *block_list, unsigned int *count) 376671cd2188e2f224aaeac4955785199f228235719Ken Sumrall{ 377671cd2188e2f224aaeac4955785199f228235719Ken Sumrall unsigned int i; 378671cd2188e2f224aaeac4955785199f228235719Ken Sumrall unsigned int *indirect_block; 379671cd2188e2f224aaeac4955785199f228235719Ken Sumrall unsigned int sectors_per_block; 380671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 381671cd2188e2f224aaeac4955785199f228235719Ken Sumrall sectors_per_block = info.block_size / INODE_BLOCK_SIZE; 382671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 383671cd2188e2f224aaeac4955785199f228235719Ken Sumrall indirect_block = (unsigned int *)malloc(info.block_size); 384671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (indirect_block == 0) { 385671cd2188e2f224aaeac4955785199f228235719Ken Sumrall critical_error("failed to allocate memory for indirect_block\n"); 386671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 387671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 388671cd2188e2f224aaeac4955785199f228235719Ken Sumrall read_block(fd, inode->i_block[EXT4_NDIR_BLOCKS], indirect_block); 389671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 390671cd2188e2f224aaeac4955785199f228235719Ken Sumrall for(i = 0; i < (inode->i_blocks_lo / sectors_per_block - EXT4_NDIR_BLOCKS); i++) { 391671cd2188e2f224aaeac4955785199f228235719Ken Sumrall block_list[EXT4_NDIR_BLOCKS+i] = indirect_block[i]; 392671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 393671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 394671cd2188e2f224aaeac4955785199f228235719Ken Sumrall *count += i; 395671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 396671cd2188e2f224aaeac4955785199f228235719Ken Sumrall free(indirect_block); 397671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 398671cd2188e2f224aaeac4955785199f228235719Ken Sumrall return 0; 399671cd2188e2f224aaeac4955785199f228235719Ken Sumrall} 400671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 401671cd2188e2f224aaeac4955785199f228235719Ken Sumrallstatic int get_block_list_indirect(int fd, struct ext4_inode *inode, unsigned long long *block_list) 402671cd2188e2f224aaeac4955785199f228235719Ken Sumrall{ 403671cd2188e2f224aaeac4955785199f228235719Ken Sumrall unsigned int count=0; 404671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 405671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (get_direct_blocks(inode, block_list, &count)) { 406671cd2188e2f224aaeac4955785199f228235719Ken Sumrall get_indirect_blocks(fd, inode, block_list, &count); 407671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 408671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 409671cd2188e2f224aaeac4955785199f228235719Ken Sumrall return count; 410671cd2188e2f224aaeac4955785199f228235719Ken Sumrall} 411671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 4125446bde9c02f6ae95a30d9c178b13a05bb580fe1Nick Kralevichstatic int get_extent_ents(struct ext4_extent_header *ext_hdr, unsigned long long *block_list) 413671cd2188e2f224aaeac4955785199f228235719Ken Sumrall{ 414671cd2188e2f224aaeac4955785199f228235719Ken Sumrall int i, j; 415671cd2188e2f224aaeac4955785199f228235719Ken Sumrall struct ext4_extent *extent; 416671cd2188e2f224aaeac4955785199f228235719Ken Sumrall off64_t fs_block_num; 417671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 418671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (ext_hdr->eh_depth != 0) { 419671cd2188e2f224aaeac4955785199f228235719Ken Sumrall critical_error("get_extent_ents called with eh_depth != 0\n"); 420671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 421671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 422671cd2188e2f224aaeac4955785199f228235719Ken Sumrall /* The extent entries immediately follow the header, so add 1 to the pointer 423671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * and cast it to an extent pointer. 424671cd2188e2f224aaeac4955785199f228235719Ken Sumrall */ 425671cd2188e2f224aaeac4955785199f228235719Ken Sumrall extent = (struct ext4_extent *)(ext_hdr + 1); 426671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 427671cd2188e2f224aaeac4955785199f228235719Ken Sumrall for (i = 0; i < ext_hdr->eh_entries; i++) { 428671cd2188e2f224aaeac4955785199f228235719Ken Sumrall fs_block_num = ((off64_t)extent->ee_start_hi << 32) | extent->ee_start_lo; 429671cd2188e2f224aaeac4955785199f228235719Ken Sumrall for (j = 0; j < extent->ee_len; j++) { 430671cd2188e2f224aaeac4955785199f228235719Ken Sumrall block_list[extent->ee_block+j] = fs_block_num+j; 431671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 432671cd2188e2f224aaeac4955785199f228235719Ken Sumrall extent++; 433671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 434671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 435671cd2188e2f224aaeac4955785199f228235719Ken Sumrall return 0; 436671cd2188e2f224aaeac4955785199f228235719Ken Sumrall} 437671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 438671cd2188e2f224aaeac4955785199f228235719Ken Sumrallstatic int get_extent_idx(int fd, struct ext4_extent_header *ext_hdr, unsigned long long *block_list) 439671cd2188e2f224aaeac4955785199f228235719Ken Sumrall{ 440671cd2188e2f224aaeac4955785199f228235719Ken Sumrall int i; 441671cd2188e2f224aaeac4955785199f228235719Ken Sumrall struct ext4_extent_idx *extent_idx; 442671cd2188e2f224aaeac4955785199f228235719Ken Sumrall struct ext4_extent_header *tmp_ext_hdr; 443671cd2188e2f224aaeac4955785199f228235719Ken Sumrall off64_t fs_block_num; 444671cd2188e2f224aaeac4955785199f228235719Ken Sumrall unsigned char block[MAX_EXT4_BLOCK_SIZE]; 445671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 446671cd2188e2f224aaeac4955785199f228235719Ken Sumrall /* Sanity check */ 447671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (ext_hdr->eh_depth == 0) { 448671cd2188e2f224aaeac4955785199f228235719Ken Sumrall critical_error("get_extent_idx called with eh_depth == 0\n"); 449671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 450671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 451671cd2188e2f224aaeac4955785199f228235719Ken Sumrall /* The extent entries immediately follow the header, so add 1 to the pointer 452671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * and cast it to an extent pointer. 453671cd2188e2f224aaeac4955785199f228235719Ken Sumrall */ 454671cd2188e2f224aaeac4955785199f228235719Ken Sumrall extent_idx = (struct ext4_extent_idx *)(ext_hdr + 1); 455671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 456671cd2188e2f224aaeac4955785199f228235719Ken Sumrall for (i = 0; i < ext_hdr->eh_entries; i++) { 457671cd2188e2f224aaeac4955785199f228235719Ken Sumrall fs_block_num = ((off64_t)extent_idx->ei_leaf_hi << 32) | extent_idx->ei_leaf_lo; 458671cd2188e2f224aaeac4955785199f228235719Ken Sumrall read_block(fd, fs_block_num, block); 459671cd2188e2f224aaeac4955785199f228235719Ken Sumrall tmp_ext_hdr = (struct ext4_extent_header *)block; 460671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 461671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (tmp_ext_hdr->eh_depth == 0) { 4625446bde9c02f6ae95a30d9c178b13a05bb580fe1Nick Kralevich get_extent_ents(tmp_ext_hdr, block_list); /* leaf node, fill in block_list */ 463671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } else { 464671cd2188e2f224aaeac4955785199f228235719Ken Sumrall get_extent_idx(fd, tmp_ext_hdr, block_list); /* recurse down the tree */ 465671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 466671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 467671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 468671cd2188e2f224aaeac4955785199f228235719Ken Sumrall return 0; 469671cd2188e2f224aaeac4955785199f228235719Ken Sumrall} 470671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 471671cd2188e2f224aaeac4955785199f228235719Ken Sumrallstatic int get_block_list_extents(int fd, struct ext4_inode *inode, unsigned long long *block_list) 472671cd2188e2f224aaeac4955785199f228235719Ken Sumrall{ 473671cd2188e2f224aaeac4955785199f228235719Ken Sumrall struct ext4_extent_header *extent_hdr; 474671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 475671cd2188e2f224aaeac4955785199f228235719Ken Sumrall extent_hdr = (struct ext4_extent_header *)inode->i_block; 476671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 477671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (extent_hdr->eh_magic != EXT4_EXT_MAGIC) { 478671cd2188e2f224aaeac4955785199f228235719Ken Sumrall critical_error("extent header has unexpected magic value 0x%4.4x\n", 479671cd2188e2f224aaeac4955785199f228235719Ken Sumrall extent_hdr->eh_magic); 480671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 481671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 482671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (extent_hdr->eh_depth == 0) { 4835446bde9c02f6ae95a30d9c178b13a05bb580fe1Nick Kralevich get_extent_ents((struct ext4_extent_header *)inode->i_block, block_list); 484671cd2188e2f224aaeac4955785199f228235719Ken Sumrall return 0; 485671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 486671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 487671cd2188e2f224aaeac4955785199f228235719Ken Sumrall get_extent_idx(fd, (struct ext4_extent_header *)inode->i_block, block_list); 488671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 489671cd2188e2f224aaeac4955785199f228235719Ken Sumrall return 0; 490671cd2188e2f224aaeac4955785199f228235719Ken Sumrall} 491671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 492671cd2188e2f224aaeac4955785199f228235719Ken Sumrallstatic int is_entry_dir(int fd, struct ext4_dir_entry_2 *dirp, int pass) 493671cd2188e2f224aaeac4955785199f228235719Ken Sumrall{ 494671cd2188e2f224aaeac4955785199f228235719Ken Sumrall struct ext4_inode inode; 495671cd2188e2f224aaeac4955785199f228235719Ken Sumrall int ret = 0; 496671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 497671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (dirp->file_type == EXT4_FT_DIR) { 498671cd2188e2f224aaeac4955785199f228235719Ken Sumrall ret = 1; 499671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } else if (dirp->file_type == EXT4_FT_UNKNOWN) { 500671cd2188e2f224aaeac4955785199f228235719Ken Sumrall /* Somebody was too lazy to fill in the dir entry, 501671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * so we have to go fetch it from the inode. Grrr. 502671cd2188e2f224aaeac4955785199f228235719Ken Sumrall */ 503671cd2188e2f224aaeac4955785199f228235719Ken Sumrall /* if UPDATE_INODE_NUMS pass and the inode high bit is not 504671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * set return false so we don't recurse down the tree that is 505671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * already updated. Otherwise, fetch inode, and return answer. 506671cd2188e2f224aaeac4955785199f228235719Ken Sumrall */ 507671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if ((pass == UPDATE_INODE_NUMS) && !(dirp->inode & 0x80000000)) { 508671cd2188e2f224aaeac4955785199f228235719Ken Sumrall ret = 0; 509671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } else { 510671cd2188e2f224aaeac4955785199f228235719Ken Sumrall read_inode(fd, (dirp->inode & 0x7fffffff), &inode); 511671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (S_ISDIR(inode.i_mode)) { 512671cd2188e2f224aaeac4955785199f228235719Ken Sumrall ret = 1; 513671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 514671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 515671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 516671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 517671cd2188e2f224aaeac4955785199f228235719Ken Sumrall return ret; 518671cd2188e2f224aaeac4955785199f228235719Ken Sumrall} 519671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 520671cd2188e2f224aaeac4955785199f228235719Ken Sumrallstatic int recurse_dir(int fd, struct ext4_inode *inode, char *dirbuf, int dirsize, int mode) 521671cd2188e2f224aaeac4955785199f228235719Ken Sumrall{ 522671cd2188e2f224aaeac4955785199f228235719Ken Sumrall unsigned long long *block_list; 523671cd2188e2f224aaeac4955785199f228235719Ken Sumrall unsigned int num_blocks; 524671cd2188e2f224aaeac4955785199f228235719Ken Sumrall struct ext4_dir_entry_2 *dirp, *prev_dirp = 0; 525671cd2188e2f224aaeac4955785199f228235719Ken Sumrall char name[256]; 526671cd2188e2f224aaeac4955785199f228235719Ken Sumrall unsigned int i, leftover_space, is_dir; 527671cd2188e2f224aaeac4955785199f228235719Ken Sumrall struct ext4_inode tmp_inode; 528671cd2188e2f224aaeac4955785199f228235719Ken Sumrall int tmp_dirsize; 529671cd2188e2f224aaeac4955785199f228235719Ken Sumrall char *tmp_dirbuf; 530671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 531671cd2188e2f224aaeac4955785199f228235719Ken Sumrall switch (mode) { 532671cd2188e2f224aaeac4955785199f228235719Ken Sumrall case SANITY_CHECK_PASS: 533671cd2188e2f224aaeac4955785199f228235719Ken Sumrall case MARK_INODE_NUMS: 534671cd2188e2f224aaeac4955785199f228235719Ken Sumrall case UPDATE_INODE_NUMS: 535671cd2188e2f224aaeac4955785199f228235719Ken Sumrall break; 536671cd2188e2f224aaeac4955785199f228235719Ken Sumrall default: 537671cd2188e2f224aaeac4955785199f228235719Ken Sumrall critical_error("recurse_dir() called witn unknown mode!\n"); 538671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 539671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 540671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (dirsize % info.block_size) { 541671cd2188e2f224aaeac4955785199f228235719Ken Sumrall critical_error("dirsize %d not a multiple of block_size %d. This is unexpected!\n", 542671cd2188e2f224aaeac4955785199f228235719Ken Sumrall dirsize, info.block_size); 543671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 544671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 545671cd2188e2f224aaeac4955785199f228235719Ken Sumrall num_blocks = dirsize / info.block_size; 546671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 547671cd2188e2f224aaeac4955785199f228235719Ken Sumrall block_list = malloc((num_blocks + 1) * sizeof(*block_list)); 548671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (block_list == 0) { 549671cd2188e2f224aaeac4955785199f228235719Ken Sumrall critical_error("failed to allocate memory for block_list\n"); 550671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 551671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 552671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (inode->i_flags & EXT4_EXTENTS_FL) { 553671cd2188e2f224aaeac4955785199f228235719Ken Sumrall get_block_list_extents(fd, inode, block_list); 554671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } else { 555671cd2188e2f224aaeac4955785199f228235719Ken Sumrall /* A directory that requires doubly or triply indirect blocks in huge indeed, 556671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * and will almost certainly not exist, especially since make_ext4fs only creates 557671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * directories with extents, and the kernel will too, but check to make sure the 558671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * directory is not that big and give an error if so. Our limit is 12 direct blocks, 559671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * plus block_size/4 singly indirect blocks, which for a filesystem with 4K blocks 560671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * is a directory 1036 blocks long, or 4,243,456 bytes long! Assuming an average 561671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * filename length of 20 (which I think is generous) thats 20 + 8 bytes overhead 562671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * per entry, or 151,552 entries in the directory! 563671cd2188e2f224aaeac4955785199f228235719Ken Sumrall */ 564671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (num_blocks > (info.block_size / 4 + EXT4_NDIR_BLOCKS)) { 565671cd2188e2f224aaeac4955785199f228235719Ken Sumrall critical_error("Non-extent based directory is too big!\n"); 566671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 567671cd2188e2f224aaeac4955785199f228235719Ken Sumrall get_block_list_indirect(fd, inode, block_list); 568671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 569671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 570671cd2188e2f224aaeac4955785199f228235719Ken Sumrall /* Read in all the blocks for this directory */ 571671cd2188e2f224aaeac4955785199f228235719Ken Sumrall for (i = 0; i < num_blocks; i++) { 572671cd2188e2f224aaeac4955785199f228235719Ken Sumrall read_block(fd, block_list[i], dirbuf + (i * info.block_size)); 573671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 574671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 575671cd2188e2f224aaeac4955785199f228235719Ken Sumrall dirp = (struct ext4_dir_entry_2 *)dirbuf; 576671cd2188e2f224aaeac4955785199f228235719Ken Sumrall while (dirp < (struct ext4_dir_entry_2 *)(dirbuf + dirsize)) { 5777e5ff13c55eb29748c07768bd7134819cbcbd4b0Ken Sumrall count++; 578671cd2188e2f224aaeac4955785199f228235719Ken Sumrall leftover_space = (char *)(dirbuf + dirsize) - (char *)dirp; 579671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (((mode == SANITY_CHECK_PASS) || (mode == UPDATE_INODE_NUMS)) && 580671cd2188e2f224aaeac4955785199f228235719Ken Sumrall (leftover_space <= 8) && prev_dirp) { 581671cd2188e2f224aaeac4955785199f228235719Ken Sumrall /* This is a bug in an older version of make_ext4fs, where it 582671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * didn't properly include the rest of the block in rec_len. 583671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * Update rec_len on the previous entry to include the rest of 584671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * the block and exit the loop. 585671cd2188e2f224aaeac4955785199f228235719Ken Sumrall */ 586671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (verbose) { 587671cd2188e2f224aaeac4955785199f228235719Ken Sumrall printf("fixing up short rec_len for diretory entry for %s\n", name); 588671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 589671cd2188e2f224aaeac4955785199f228235719Ken Sumrall prev_dirp->rec_len += leftover_space; 590671cd2188e2f224aaeac4955785199f228235719Ken Sumrall break; 591671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 592671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 593671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (dirp->inode == 0) { 594671cd2188e2f224aaeac4955785199f228235719Ken Sumrall /* This is the last entry in the directory */ 595671cd2188e2f224aaeac4955785199f228235719Ken Sumrall break; 596671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 597671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 598671cd2188e2f224aaeac4955785199f228235719Ken Sumrall strncpy(name, dirp->name, dirp->name_len); 599671cd2188e2f224aaeac4955785199f228235719Ken Sumrall name[dirp->name_len]='\0'; 600671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 60197fc910ce0e05862888fd1d9e1938feba40f7539Ken Sumrall /* Only recurse on pass UPDATE_INODE_NUMS if the high bit is set. 602671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * Otherwise, this inode entry has already been updated 603671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * and we'll do the wrong thing. Also don't recurse on . or .., 604671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * and certainly not on non-directories! 605671cd2188e2f224aaeac4955785199f228235719Ken Sumrall */ 606671cd2188e2f224aaeac4955785199f228235719Ken Sumrall /* Hrm, looks like filesystems made by fastboot on stingray set the file_type 607671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * flag, but the lost+found directory has the type set to Unknown, which 608671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * seems to imply I need to read the inode and get it. 609671cd2188e2f224aaeac4955785199f228235719Ken Sumrall */ 610671cd2188e2f224aaeac4955785199f228235719Ken Sumrall is_dir = is_entry_dir(fd, dirp, mode); 611671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if ( is_dir && (strcmp(name, ".") && strcmp(name, "..")) && 612671cd2188e2f224aaeac4955785199f228235719Ken Sumrall ((mode == SANITY_CHECK_PASS) || (mode == MARK_INODE_NUMS) || 61397fc910ce0e05862888fd1d9e1938feba40f7539Ken Sumrall ((mode == UPDATE_INODE_NUMS) && (dirp->inode & 0x80000000))) ) { 614671cd2188e2f224aaeac4955785199f228235719Ken Sumrall /* A directory! Recurse! */ 615671cd2188e2f224aaeac4955785199f228235719Ken Sumrall read_inode(fd, dirp->inode & 0x7fffffff, &tmp_inode); 616671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 617671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (!S_ISDIR(tmp_inode.i_mode)) { 618671cd2188e2f224aaeac4955785199f228235719Ken Sumrall critical_error("inode %d for name %s does not point to a directory\n", 619671cd2188e2f224aaeac4955785199f228235719Ken Sumrall dirp->inode & 0x7fffffff, name); 620671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 621671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (verbose) { 622671cd2188e2f224aaeac4955785199f228235719Ken Sumrall printf("inode %d %s use extents\n", dirp->inode & 0x7fffffff, 623671cd2188e2f224aaeac4955785199f228235719Ken Sumrall (tmp_inode.i_flags & EXT4_EXTENTS_FL) ? "does" : "does not"); 624671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 625671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 626671cd2188e2f224aaeac4955785199f228235719Ken Sumrall tmp_dirsize = tmp_inode.i_blocks_lo * INODE_BLOCK_SIZE; 627671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (verbose) { 628671cd2188e2f224aaeac4955785199f228235719Ken Sumrall printf("dir size = %d bytes\n", tmp_dirsize); 629671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 630671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 631671cd2188e2f224aaeac4955785199f228235719Ken Sumrall tmp_dirbuf = malloc(tmp_dirsize); 632671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (tmp_dirbuf == 0) { 633671cd2188e2f224aaeac4955785199f228235719Ken Sumrall critical_error("failed to allocate memory for tmp_dirbuf\n"); 634671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 635671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 636671cd2188e2f224aaeac4955785199f228235719Ken Sumrall recurse_dir(fd, &tmp_inode, tmp_dirbuf, tmp_dirsize, mode); 637671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 638671cd2188e2f224aaeac4955785199f228235719Ken Sumrall free(tmp_dirbuf); 639671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 640671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 641671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (verbose) { 642671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (is_dir) { 643671cd2188e2f224aaeac4955785199f228235719Ken Sumrall printf("Directory %s\n", name); 644671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } else { 645671cd2188e2f224aaeac4955785199f228235719Ken Sumrall printf("Non-directory %s\n", name); 646671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 647671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 648671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 649671cd2188e2f224aaeac4955785199f228235719Ken Sumrall /* Process entry based on current mode. Either set high bit or change inode number */ 650671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (mode == MARK_INODE_NUMS) { 651671cd2188e2f224aaeac4955785199f228235719Ken Sumrall dirp->inode |= 0x80000000; 652671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } else if (mode == UPDATE_INODE_NUMS) { 65397fc910ce0e05862888fd1d9e1938feba40f7539Ken Sumrall if (dirp->inode & 0x80000000) { 654671cd2188e2f224aaeac4955785199f228235719Ken Sumrall dirp->inode = compute_new_inum(dirp->inode & 0x7fffffff); 655671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 656671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 657671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 6587e5ff13c55eb29748c07768bd7134819cbcbd4b0Ken Sumrall if ((bail_phase == mode) && (bail_loc == 1) && (bail_count == count)) { 6597e5ff13c55eb29748c07768bd7134819cbcbd4b0Ken Sumrall critical_error("Bailing at phase %d, loc 1 and count %d\n", mode, count); 6607e5ff13c55eb29748c07768bd7134819cbcbd4b0Ken Sumrall } 6617e5ff13c55eb29748c07768bd7134819cbcbd4b0Ken Sumrall 662671cd2188e2f224aaeac4955785199f228235719Ken Sumrall /* Point dirp at the next entry */ 663671cd2188e2f224aaeac4955785199f228235719Ken Sumrall prev_dirp = dirp; 664671cd2188e2f224aaeac4955785199f228235719Ken Sumrall dirp = (struct ext4_dir_entry_2*)((char *)dirp + dirp->rec_len); 665671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 666671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 667671cd2188e2f224aaeac4955785199f228235719Ken Sumrall /* Write out all the blocks for this directory */ 668671cd2188e2f224aaeac4955785199f228235719Ken Sumrall for (i = 0; i < num_blocks; i++) { 669671cd2188e2f224aaeac4955785199f228235719Ken Sumrall write_block(fd, block_list[i], dirbuf + (i * info.block_size)); 6707e5ff13c55eb29748c07768bd7134819cbcbd4b0Ken Sumrall if ((bail_phase == mode) && (bail_loc == 2) && (bail_count <= count)) { 6717e5ff13c55eb29748c07768bd7134819cbcbd4b0Ken Sumrall critical_error("Bailing at phase %d, loc 2 and count %d\n", mode, count); 6727e5ff13c55eb29748c07768bd7134819cbcbd4b0Ken Sumrall } 673671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 674671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 675671cd2188e2f224aaeac4955785199f228235719Ken Sumrall free(block_list); 676671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 677671cd2188e2f224aaeac4955785199f228235719Ken Sumrall return 0; 678671cd2188e2f224aaeac4955785199f228235719Ken Sumrall} 679671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 680671cd2188e2f224aaeac4955785199f228235719Ken Sumrallint ext4fixup(char *fsdev) 681671cd2188e2f224aaeac4955785199f228235719Ken Sumrall{ 6827e5ff13c55eb29748c07768bd7134819cbcbd4b0Ken Sumrall return ext4fixup_internal(fsdev, 0, 0, 0, 0, 0); 683671cd2188e2f224aaeac4955785199f228235719Ken Sumrall} 684671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 6857e5ff13c55eb29748c07768bd7134819cbcbd4b0Ken Sumrallint ext4fixup_internal(char *fsdev, int v_flag, int n_flag, 6867e5ff13c55eb29748c07768bd7134819cbcbd4b0Ken Sumrall int stop_phase, int stop_loc, int stop_count) 687671cd2188e2f224aaeac4955785199f228235719Ken Sumrall{ 688671cd2188e2f224aaeac4955785199f228235719Ken Sumrall int fd; 689671cd2188e2f224aaeac4955785199f228235719Ken Sumrall struct ext4_inode root_inode; 690671cd2188e2f224aaeac4955785199f228235719Ken Sumrall unsigned int dirsize; 691671cd2188e2f224aaeac4955785199f228235719Ken Sumrall char *dirbuf; 692671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 693671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (setjmp(setjmp_env)) 694671cd2188e2f224aaeac4955785199f228235719Ken Sumrall return EXIT_FAILURE; /* Handle a call to longjmp() */ 695671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 696671cd2188e2f224aaeac4955785199f228235719Ken Sumrall verbose = v_flag; 697671cd2188e2f224aaeac4955785199f228235719Ken Sumrall no_write = n_flag; 698671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 6997e5ff13c55eb29748c07768bd7134819cbcbd4b0Ken Sumrall bail_phase = stop_phase; 7007e5ff13c55eb29748c07768bd7134819cbcbd4b0Ken Sumrall bail_loc = stop_loc; 7017e5ff13c55eb29748c07768bd7134819cbcbd4b0Ken Sumrall bail_count = stop_count; 7027e5ff13c55eb29748c07768bd7134819cbcbd4b0Ken Sumrall 703671cd2188e2f224aaeac4955785199f228235719Ken Sumrall fd = open(fsdev, O_RDWR); 704671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 705671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (fd < 0) 706671cd2188e2f224aaeac4955785199f228235719Ken Sumrall critical_error_errno("failed to open filesystem image"); 707671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 708ee2bba62529ce544a60d141ca10a37407c03ab1ePaul Lawrence read_ext(fd, verbose); 709ee2bba62529ce544a60d141ca10a37407c03ab1ePaul Lawrence 710ee2bba62529ce544a60d141ca10a37407c03ab1ePaul Lawrence if (info.feat_incompat & EXT4_FEATURE_INCOMPAT_RECOVER) { 711ee2bba62529ce544a60d141ca10a37407c03ab1ePaul Lawrence critical_error("Filesystem needs recovery first, mount and unmount to do that\n"); 712ee2bba62529ce544a60d141ca10a37407c03ab1ePaul Lawrence } 713ee2bba62529ce544a60d141ca10a37407c03ab1ePaul Lawrence 714ee2bba62529ce544a60d141ca10a37407c03ab1ePaul Lawrence /* Clear the low bit which is set while this tool is in progress. 715ee2bba62529ce544a60d141ca10a37407c03ab1ePaul Lawrence * If the tool crashes, it will still be set when we restart. 716ee2bba62529ce544a60d141ca10a37407c03ab1ePaul Lawrence * The low bit is set to make the filesystem unmountable while 717ee2bba62529ce544a60d141ca10a37407c03ab1ePaul Lawrence * it is being fixed up. Also allow 0, which means the old ext2 718ee2bba62529ce544a60d141ca10a37407c03ab1ePaul Lawrence * size is in use. 719ee2bba62529ce544a60d141ca10a37407c03ab1ePaul Lawrence */ 720ee2bba62529ce544a60d141ca10a37407c03ab1ePaul Lawrence if (((aux_info.sb->s_desc_size & ~1) != sizeof(struct ext2_group_desc)) && 721ee2bba62529ce544a60d141ca10a37407c03ab1ePaul Lawrence ((aux_info.sb->s_desc_size & ~1) != 0)) 722ee2bba62529ce544a60d141ca10a37407c03ab1ePaul Lawrence critical_error("error: bg_desc_size != sizeof(struct ext2_group_desc)\n"); 723671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 724671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if ((info.feat_incompat & EXT4_FEATURE_INCOMPAT_FILETYPE) == 0) { 725671cd2188e2f224aaeac4955785199f228235719Ken Sumrall critical_error("Expected filesystem to have filetype flag set\n"); 726671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 727671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 728671cd2188e2f224aaeac4955785199f228235719Ken Sumrall#if 0 // If we have to fix the directory rec_len issue, we can't use this check 729671cd2188e2f224aaeac4955785199f228235719Ken Sumrall /* Check to see if the inodes/group is copacetic */ 730671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (info.inodes_per_blockgroup % (info.block_size/info.inode_size) == 0) { 731671cd2188e2f224aaeac4955785199f228235719Ken Sumrall /* This filesystem has either already been updated, or was 732671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * made correctly. 733671cd2188e2f224aaeac4955785199f228235719Ken Sumrall */ 734671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (verbose) { 735671cd2188e2f224aaeac4955785199f228235719Ken Sumrall printf("%s: filesystem correct, no work to do\n", me); 736671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 737671cd2188e2f224aaeac4955785199f228235719Ken Sumrall exit(0); 738671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 739671cd2188e2f224aaeac4955785199f228235719Ken Sumrall#endif 740671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 741671cd2188e2f224aaeac4955785199f228235719Ken Sumrall /* Compute what the new value of inodes_per_blockgroup will be when we're done */ 74240ce87a70a064eeb462d3c3935422918c1f6114ePaul Lawrence new_inodes_per_group=EXT4_ALIGN(info.inodes_per_group,(info.block_size/info.inode_size)); 743671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 744671cd2188e2f224aaeac4955785199f228235719Ken Sumrall read_inode(fd, EXT4_ROOT_INO, &root_inode); 745671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 746671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (!S_ISDIR(root_inode.i_mode)) { 747671cd2188e2f224aaeac4955785199f228235719Ken Sumrall critical_error("root inode %d does not point to a directory\n", EXT4_ROOT_INO); 748671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 749671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (verbose) { 750671cd2188e2f224aaeac4955785199f228235719Ken Sumrall printf("inode %d %s use extents\n", EXT4_ROOT_INO, 751671cd2188e2f224aaeac4955785199f228235719Ken Sumrall (root_inode.i_flags & EXT4_EXTENTS_FL) ? "does" : "does not"); 752671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 753671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 754671cd2188e2f224aaeac4955785199f228235719Ken Sumrall dirsize = root_inode.i_blocks_lo * INODE_BLOCK_SIZE; 755671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (verbose) { 756671cd2188e2f224aaeac4955785199f228235719Ken Sumrall printf("root dir size = %d bytes\n", dirsize); 757671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 758671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 759671cd2188e2f224aaeac4955785199f228235719Ken Sumrall dirbuf = malloc(dirsize); 760671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (dirbuf == 0) { 761671cd2188e2f224aaeac4955785199f228235719Ken Sumrall critical_error("failed to allocate memory for dirbuf\n"); 762671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 763671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 764671cd2188e2f224aaeac4955785199f228235719Ken Sumrall /* Perform a sanity check pass first, try to catch any errors that will occur 765671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * before we actually change anything, so we don't leave a filesystem in a 766671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * corrupted, unrecoverable state. Set no_write, make it quiet, and do a recurse 767671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * pass and a update_superblock pass. Set flags back to requested state when done. 76897fc910ce0e05862888fd1d9e1938feba40f7539Ken Sumrall * Only perform sanity check if the state is unset. If the state is _NOT_ unset, 76997fc910ce0e05862888fd1d9e1938feba40f7539Ken Sumrall * then the tool has already been run and interrupted, and it presumably ran and 77097fc910ce0e05862888fd1d9e1938feba40f7539Ken Sumrall * passed sanity checked before it got interrupted. It is _NOT_ safe to run sanity 77197fc910ce0e05862888fd1d9e1938feba40f7539Ken Sumrall * check if state is unset because it assumes inodes are to be computed using the 77297fc910ce0e05862888fd1d9e1938feba40f7539Ken Sumrall * old inodes/group, but some inode numbers may be updated to the new number. 773671cd2188e2f224aaeac4955785199f228235719Ken Sumrall */ 774671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (get_fs_fixup_state(fd) == STATE_UNSET) { 77597fc910ce0e05862888fd1d9e1938feba40f7539Ken Sumrall verbose = 0; 77697fc910ce0e05862888fd1d9e1938feba40f7539Ken Sumrall no_write = 1; 77797fc910ce0e05862888fd1d9e1938feba40f7539Ken Sumrall recurse_dir(fd, &root_inode, dirbuf, dirsize, SANITY_CHECK_PASS); 77897fc910ce0e05862888fd1d9e1938feba40f7539Ken Sumrall update_superblocks_and_bg_desc(fd, STATE_UNSET); 77997fc910ce0e05862888fd1d9e1938feba40f7539Ken Sumrall verbose = v_flag; 78097fc910ce0e05862888fd1d9e1938feba40f7539Ken Sumrall no_write = n_flag; 78197fc910ce0e05862888fd1d9e1938feba40f7539Ken Sumrall 782671cd2188e2f224aaeac4955785199f228235719Ken Sumrall set_fs_fixup_state(fd, STATE_MARKING_INUMS); 783671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 784671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 785671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (get_fs_fixup_state(fd) == STATE_MARKING_INUMS) { 7867e5ff13c55eb29748c07768bd7134819cbcbd4b0Ken Sumrall count = 0; /* Reset debugging counter */ 787671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (!recurse_dir(fd, &root_inode, dirbuf, dirsize, MARK_INODE_NUMS)) { 788671cd2188e2f224aaeac4955785199f228235719Ken Sumrall set_fs_fixup_state(fd, STATE_UPDATING_INUMS); 789671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 790671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 791671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 792671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (get_fs_fixup_state(fd) == STATE_UPDATING_INUMS) { 7937e5ff13c55eb29748c07768bd7134819cbcbd4b0Ken Sumrall count = 0; /* Reset debugging counter */ 794671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (!recurse_dir(fd, &root_inode, dirbuf, dirsize, UPDATE_INODE_NUMS)) { 795671cd2188e2f224aaeac4955785199f228235719Ken Sumrall set_fs_fixup_state(fd, STATE_UPDATING_SB); 796671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 797671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 798671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 799671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (get_fs_fixup_state(fd) == STATE_UPDATING_SB) { 80097fc910ce0e05862888fd1d9e1938feba40f7539Ken Sumrall /* set the new inodes/blockgroup number, 801671cd2188e2f224aaeac4955785199f228235719Ken Sumrall * and sets the state back to 0. 802671cd2188e2f224aaeac4955785199f228235719Ken Sumrall */ 803671cd2188e2f224aaeac4955785199f228235719Ken Sumrall if (!update_superblocks_and_bg_desc(fd, STATE_UPDATING_SB)) { 804671cd2188e2f224aaeac4955785199f228235719Ken Sumrall set_fs_fixup_state(fd, STATE_UNSET); 805671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 806671cd2188e2f224aaeac4955785199f228235719Ken Sumrall } 807671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 808671cd2188e2f224aaeac4955785199f228235719Ken Sumrall close(fd); 809671cd2188e2f224aaeac4955785199f228235719Ken Sumrall 810671cd2188e2f224aaeac4955785199f228235719Ken Sumrall return 0; 811671cd2188e2f224aaeac4955785199f228235719Ken Sumrall} 812