mkjournal.c revision 4e40f6c348b9c9f4bd9c82c2b5404c2eabbdc1d3
1d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o/* 2d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o * mkjournal.c --- make a journal for a filesystem 3d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o * 4d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o * Copyright (C) 2000 Theodore Ts'o. 5d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o * 6d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o * %Begin-Header% 7d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o * This file may be redistributed under the terms of the GNU Public 8d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o * License. 9d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o * %End-Header% 10d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o */ 11d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 12d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o#include <stdio.h> 13d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o#include <string.h> 14d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o#if HAVE_UNISTD_H 15d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o#include <unistd.h> 16d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o#endif 17d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o#if HAVE_ERRNO_H 18d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o#include <errno.h> 19d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o#endif 20d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o#include <fcntl.h> 21d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o#include <time.h> 22d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o#if HAVE_SYS_STAT_H 23d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o#include <sys/stat.h> 24d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o#endif 25d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o#if HAVE_SYS_TYPES_H 26d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o#include <sys/types.h> 27d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o#endif 28349a484a57ab13fed315f72552bdf8dbf89ba72aTheodore Ts'o#if HAVE_SYS_IOCTL_H 29349a484a57ab13fed315f72552bdf8dbf89ba72aTheodore Ts'o#include <sys/ioctl.h> 30349a484a57ab13fed315f72552bdf8dbf89ba72aTheodore Ts'o#endif 3117ee8b17f91988a3beedbd96eec4642e784f3251Theodore Ts'o#if HAVE_NETINET_IN_H 3217ee8b17f91988a3beedbd96eec4642e784f3251Theodore Ts'o#include <netinet/in.h> 3317ee8b17f91988a3beedbd96eec4642e784f3251Theodore Ts'o#endif 34d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 35d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o#include "ext2_fs.h" 36cdaf1fa78f6d63457eb5337c14b23e567d1346a7Theodore Ts'o#include "e2p/e2p.h" 37d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o#include "ext2fs.h" 38586187372afea65ae685687505b49b40fc5f3212Theodore Ts'o#include "jfs_user.h" 39d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 40a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o/* 41a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o * This function automatically sets up the journal superblock and 42a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o * returns it as an allocated block. 43a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o */ 44a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'oerrcode_t ext2fs_create_journal_superblock(ext2_filsys fs, 45a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o __u32 size, int flags, 46a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o char **ret_jsb) 47d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o{ 48a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o errcode_t retval; 49a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o journal_superblock_t *jsb; 50036039460ff76f397bc23977a26632698136b0e6Theodore Ts'o 51036039460ff76f397bc23977a26632698136b0e6Theodore Ts'o if (size < 1024) 52036039460ff76f397bc23977a26632698136b0e6Theodore Ts'o return EXT2_ET_JOURNAL_TOO_SMALL; 53036039460ff76f397bc23977a26632698136b0e6Theodore Ts'o 54a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o if ((retval = ext2fs_get_mem(fs->blocksize, (void **) &jsb))) 55a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o return retval; 56a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o 57a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o memset (jsb, 0, fs->blocksize); 58586187372afea65ae685687505b49b40fc5f3212Theodore Ts'o 59d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o jsb->s_header.h_magic = htonl(JFS_MAGIC_NUMBER); 604e246704eab31407ac15be9ab206c6f929507cf0Theodore Ts'o if (flags & EXT2_MKJOURNAL_V1_SUPER) 614e246704eab31407ac15be9ab206c6f929507cf0Theodore Ts'o jsb->s_header.h_blocktype = htonl(JFS_SUPERBLOCK_V1); 624e246704eab31407ac15be9ab206c6f929507cf0Theodore Ts'o else 634e246704eab31407ac15be9ab206c6f929507cf0Theodore Ts'o jsb->s_header.h_blocktype = htonl(JFS_SUPERBLOCK_V2); 64a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o jsb->s_blocksize = htonl(fs->blocksize); 65d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o jsb->s_maxlen = htonl(size); 66d23042af75f2723ed4575946cfa310fca4e526efTheodore Ts'o jsb->s_nr_users = htonl(1); 67d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o jsb->s_first = htonl(1); 68d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o jsb->s_sequence = htonl(1); 69a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o memcpy(jsb->s_uuid, fs->super->s_uuid, sizeof(fs->super->s_uuid)); 70a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o /* 71d23042af75f2723ed4575946cfa310fca4e526efTheodore Ts'o * If we're creating an external journal device, we need to 72d23042af75f2723ed4575946cfa310fca4e526efTheodore Ts'o * adjust these fields. 73a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o */ 74a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o if (fs->super->s_feature_incompat & 754e40f6c348b9c9f4bd9c82c2b5404c2eabbdc1d3Theodore Ts'o EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) { 76a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o jsb->s_nr_users = 0; 774e40f6c348b9c9f4bd9c82c2b5404c2eabbdc1d3Theodore Ts'o if (fs->blocksize == 1024) 784e40f6c348b9c9f4bd9c82c2b5404c2eabbdc1d3Theodore Ts'o jsb->s_first = htonl(3); 794e40f6c348b9c9f4bd9c82c2b5404c2eabbdc1d3Theodore Ts'o else 804e40f6c348b9c9f4bd9c82c2b5404c2eabbdc1d3Theodore Ts'o jsb->s_first = htonl(2); 814e40f6c348b9c9f4bd9c82c2b5404c2eabbdc1d3Theodore Ts'o } 82a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o 83a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o *ret_jsb = (char *) jsb; 84a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o return 0; 85d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o} 864becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 87d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o/* 884becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o * This function writes a journal using POSIX routines. It is used 894becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o * for creating external journals and creating journals on live 904becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o * filesystems. 91d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o */ 92a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'ostatic errcode_t write_journal_file(ext2_filsys fs, char *filename, 934e246704eab31407ac15be9ab206c6f929507cf0Theodore Ts'o blk_t size, int flags) 94d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o{ 95d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o errcode_t retval; 96d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o char *buf = 0; 97d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o int i, fd, ret_size; 98d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 99a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o if ((retval = ext2fs_create_journal_superblock(fs, size, flags, &buf))) 100a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o return retval; 101d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 102a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o /* Open the device or journal file */ 103a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o if ((fd = open(filename, O_WRONLY)) < 0) { 104d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o retval = errno; 105d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o goto errout; 106d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o } 107d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 108d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o /* Write the superblock out */ 109d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o retval = EXT2_ET_SHORT_WRITE; 110d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o ret_size = write(fd, buf, fs->blocksize); 111d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (ret_size < 0) { 112a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o retval = errno; 113d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o goto errout; 114d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o } 115d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (ret_size != fs->blocksize) 116d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o goto errout; 117d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o memset(buf, 0, fs->blocksize); 1184becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 1194becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o for (i = 1; i < size; i++) { 120d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o ret_size = write(fd, buf, fs->blocksize); 121d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (ret_size < 0) { 122d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o retval = errno; 123d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o goto errout; 124d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o } 125d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (ret_size != fs->blocksize) 126d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o goto errout; 127d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o } 128d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o close(fd); 129d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 1304becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o retval = 0; 131d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'oerrout: 132a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o ext2fs_free_mem((void **) &buf); 133d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o return retval; 134d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o} 135d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 136d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o/* 1374becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o * Helper function for creating the journal using direct I/O routines 138d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o */ 139d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'ostruct mkjournal_struct { 140d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o int num_blocks; 141d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o int newblocks; 142d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o char *buf; 143d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o errcode_t err; 144d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o}; 145d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 146d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'ostatic int mkjournal_proc(ext2_filsys fs, 147d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o blk_t *blocknr, 148d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o e2_blkcnt_t blockcnt, 149d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o blk_t ref_block, 150d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o int ref_offset, 151d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o void *priv_data) 152d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o{ 153d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o struct mkjournal_struct *es = (struct mkjournal_struct *) priv_data; 154d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o blk_t new_blk; 155d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o static blk_t last_blk = 0; 156d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o errcode_t retval; 157d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o int group; 158d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 159d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (*blocknr) { 160d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o last_blk = *blocknr; 161d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o return 0; 162d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o } 163d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o retval = ext2fs_new_block(fs, last_blk, 0, &new_blk); 164d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (retval) { 165d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o es->err = retval; 166d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o return BLOCK_ABORT; 167d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o } 168d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (blockcnt > 0) 169d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o es->num_blocks--; 170d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 171d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o es->newblocks++; 172d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o retval = io_channel_write_blk(fs->io, new_blk, 1, es->buf); 173d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 174d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (blockcnt == 0) 175d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o memset(es->buf, 0, fs->blocksize); 176d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 177d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (retval) { 178d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o es->err = retval; 179d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o return BLOCK_ABORT; 180d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o } 181d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o *blocknr = new_blk; 182d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o ext2fs_mark_block_bitmap(fs->block_map, new_blk); 183d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o ext2fs_mark_bb_dirty(fs); 184d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o group = ext2fs_group_of_blk(fs, new_blk); 185d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o fs->group_desc[group].bg_free_blocks_count--; 186d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o fs->super->s_free_blocks_count--; 187d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o ext2fs_mark_super_dirty(fs); 188d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 189d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (es->num_blocks == 0) 190d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o return (BLOCK_CHANGED | BLOCK_ABORT); 191d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o else 192d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o return BLOCK_CHANGED; 193d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 194d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o} 195d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 196d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o/* 1974becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o * This function creates a journal using direct I/O routines. 198d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o */ 19931dbecd482405e0d3a67eb58e1a1c8cb9f2ad83eTheodore Ts'ostatic errcode_t write_journal_inode(ext2_filsys fs, ext2_ino_t journal_ino, 2004becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o blk_t size, int flags) 201d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o{ 202a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o char *buf; 203d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o errcode_t retval; 204d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o struct ext2_inode inode; 205d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o struct mkjournal_struct es; 206d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 207a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o if ((retval = ext2fs_create_journal_superblock(fs, size, flags, &buf))) 208a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o return retval; 209a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o 210d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if ((retval = ext2fs_read_bitmaps(fs))) 211d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o return retval; 212d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 2134becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o if ((retval = ext2fs_read_inode(fs, journal_ino, &inode))) 214d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o return retval; 215d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 216d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (inode.i_blocks > 0) 217d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o return EEXIST; 218d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 219d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o es.num_blocks = size; 220d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o es.newblocks = 0; 221d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o es.buf = buf; 222d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o es.err = 0; 223d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 2244becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o retval = ext2fs_block_iterate2(fs, journal_ino, BLOCK_FLAG_APPEND, 225d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 0, mkjournal_proc, &es); 226a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o if (es.err) { 227a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o retval = es.err; 228a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o goto errout; 229a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o } 230d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 2314becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o if ((retval = ext2fs_read_inode(fs, journal_ino, &inode))) 232a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o goto errout; 233d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 234d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o inode.i_size += fs->blocksize * size; 235d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o inode.i_blocks += (fs->blocksize / 512) * es.newblocks; 236d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o inode.i_mtime = inode.i_ctime = time(0); 237d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o inode.i_links_count = 1; 238d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o inode.i_mode = LINUX_S_IFREG | 0600; 239d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 2404becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o if ((retval = ext2fs_write_inode(fs, journal_ino, &inode))) 241a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o goto errout; 242a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o retval = 0; 243d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 244a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'oerrout: 245a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o ext2fs_free_mem((void **) &buf); 246a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o return retval; 2474becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o} 2484becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 2494becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o/* 2504becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o * This function adds a journal device to a filesystem 2514becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o */ 252a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'oerrcode_t ext2fs_add_journal_device(ext2_filsys fs, ext2_filsys journal_dev) 2534becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o{ 2544becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o struct stat st; 2554becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o errcode_t retval; 256a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o char buf[1024]; 257a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o journal_superblock_t *jsb; 25836131b37d7d37ad59153cc2c56f774e28e286acfTheodore Ts'o int i, start; 259a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o __u32 nr_users; 2604becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 2614becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o /* Make sure the device exists and is a block device */ 262020888625fb8f6d5293e67da95ae18c0af45aeadTheodore Ts'o if (stat(journal_dev->device_name, &st) < 0) 2634becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o return errno; 264a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o 2654becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o if (!S_ISBLK(st.st_mode)) 266036039460ff76f397bc23977a26632698136b0e6Theodore Ts'o return EXT2_ET_JOURNAL_NOT_BLOCK; /* Must be a block device */ 2674becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 268a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o /* Get the journal superblock */ 26936131b37d7d37ad59153cc2c56f774e28e286acfTheodore Ts'o start = 1; 27036131b37d7d37ad59153cc2c56f774e28e286acfTheodore Ts'o if (journal_dev->blocksize == 1024) 27136131b37d7d37ad59153cc2c56f774e28e286acfTheodore Ts'o start++; 27236131b37d7d37ad59153cc2c56f774e28e286acfTheodore Ts'o if ((retval = io_channel_read_blk(journal_dev->io, start, -1024, buf))) 2734becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o return retval; 2744becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 275a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o jsb = (journal_superblock_t *) buf; 276a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) || 277a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o (jsb->s_header.h_blocktype != (unsigned) ntohl(JFS_SUPERBLOCK_V2))) 278036039460ff76f397bc23977a26632698136b0e6Theodore Ts'o return EXT2_ET_NO_JOURNAL_SB; 279a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o 280a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o if (ntohl(jsb->s_blocksize) != fs->blocksize) 281a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o return EXT2_ET_UNEXPECTED_BLOCK_SIZE; 282a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o 283a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o /* Check and see if this filesystem has already been added */ 284a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o nr_users = ntohl(jsb->s_nr_users); 285a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o for (i=0; i < nr_users; i++) { 286a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o if (memcmp(fs->super->s_uuid, 287a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o &jsb->s_users[i*16], 16) == 0) 288a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o break; 289a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o } 290a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o if (i >= nr_users) { 291a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o memcpy(&jsb->s_users[nr_users*16], 292a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o fs->super->s_uuid, 16); 293a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o jsb->s_nr_users = htonl(nr_users+1); 294a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o } 2954becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 296a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o /* Writeback the journal superblock */ 297f35e6440ef09dca989d98213c1be62efd1ee183aTheodore Ts'o if ((retval = io_channel_write_blk(journal_dev->io, start, -1024, buf))) 2984becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o return retval; 2994becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 3004becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o fs->super->s_journal_inum = 0; 3014becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o fs->super->s_journal_dev = st.st_rdev; 302a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o memcpy(fs->super->s_journal_uuid, jsb->s_uuid, 3034becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o sizeof(fs->super->s_journal_uuid)); 3044becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o fs->super->s_feature_compat |= EXT3_FEATURE_COMPAT_HAS_JOURNAL; 3054becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o ext2fs_mark_super_dirty(fs); 306cdaf1fa78f6d63457eb5337c14b23e567d1346a7Theodore Ts'o return 0; 3074becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o} 3084becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 3094becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o/* 3104becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o * This function adds a journal inode to a filesystem, using either 3114becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o * POSIX routines if the filesystem is mounted, or using direct I/O 3124becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o * functions if it is not. 3134becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o */ 3144becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'oerrcode_t ext2fs_add_journal_inode(ext2_filsys fs, blk_t size, int flags) 3154becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o{ 3164becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o errcode_t retval; 31731dbecd482405e0d3a67eb58e1a1c8cb9f2ad83eTheodore Ts'o ext2_ino_t journal_ino; 3184becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o struct stat st; 3194becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o char jfile[1024]; 320349a484a57ab13fed315f72552bdf8dbf89ba72aTheodore Ts'o int fd, mount_flags, f; 3214becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 322cdaf1fa78f6d63457eb5337c14b23e567d1346a7Theodore Ts'o if ((retval = ext2fs_check_mount_point(fs->device_name, &mount_flags, 323cdaf1fa78f6d63457eb5337c14b23e567d1346a7Theodore Ts'o jfile, sizeof(jfile)-10))) 3244becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o return retval; 3254becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 3264becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o if (mount_flags & EXT2_MF_MOUNTED) { 3274becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o strcat(jfile, "/.journal"); 3284becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 3294becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o /* Create the journal file */ 3304becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o if ((fd = open(jfile, O_CREAT|O_WRONLY, 0600)) < 0) 3314becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o return errno; 3324becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 3334becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o if ((retval = write_journal_file(fs, jfile, size, flags))) 334b23520d0501095dee715d0829c365933c216e612Theodore Ts'o goto errout; 335b23520d0501095dee715d0829c365933c216e612Theodore Ts'o 3364becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o /* Get inode number of the journal file */ 337349a484a57ab13fed315f72552bdf8dbf89ba72aTheodore Ts'o if (fstat(fd, &st) < 0) 338b23520d0501095dee715d0829c365933c216e612Theodore Ts'o goto errout; 3394becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 3407833262585b0f9f85915c387fa35708cf3ff3609Theodore Ts'o#if defined(HAVE_CHFLAGS) && defined(UF_NODUMP) 341349a484a57ab13fed315f72552bdf8dbf89ba72aTheodore Ts'o retval = fchflags (fd, UF_NODUMP|UF_IMMUTABLE); 342349a484a57ab13fed315f72552bdf8dbf89ba72aTheodore Ts'o#else 343349a484a57ab13fed315f72552bdf8dbf89ba72aTheodore Ts'o#if HAVE_EXT2_IOCTLS 344349a484a57ab13fed315f72552bdf8dbf89ba72aTheodore Ts'o f = EXT2_NODUMP_FL | EXT2_IMMUTABLE_FL;; 345349a484a57ab13fed315f72552bdf8dbf89ba72aTheodore Ts'o retval = ioctl(fd, EXT2_IOC_SETFLAGS, &f); 346349a484a57ab13fed315f72552bdf8dbf89ba72aTheodore Ts'o#endif 347349a484a57ab13fed315f72552bdf8dbf89ba72aTheodore Ts'o#endif 348349a484a57ab13fed315f72552bdf8dbf89ba72aTheodore Ts'o if (retval) 349b23520d0501095dee715d0829c365933c216e612Theodore Ts'o goto errout; 350b23520d0501095dee715d0829c365933c216e612Theodore Ts'o 351b23520d0501095dee715d0829c365933c216e612Theodore Ts'o close(fd); 3524becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o journal_ino = st.st_ino; 3534becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o } else { 3544becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o journal_ino = EXT2_JOURNAL_INO; 3554becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o if ((retval = write_journal_inode(fs, journal_ino, 3564becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o size, flags))) 3574becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o return retval; 3584becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o } 3594becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 3604becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o fs->super->s_journal_inum = journal_ino; 3614becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o fs->super->s_journal_dev = 0; 3624becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o memset(fs->super->s_journal_uuid, 0, 3634becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o sizeof(fs->super->s_journal_uuid)); 364d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o fs->super->s_feature_compat |= EXT3_FEATURE_COMPAT_HAS_JOURNAL; 365d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 366d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o ext2fs_mark_super_dirty(fs); 367d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o return 0; 368b23520d0501095dee715d0829c365933c216e612Theodore Ts'oerrout: 369b23520d0501095dee715d0829c365933c216e612Theodore Ts'o close(fd); 370b23520d0501095dee715d0829c365933c216e612Theodore Ts'o return retval; 371d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o} 372d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 373d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o#ifdef DEBUG 374d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'omain(int argc, char **argv) 375d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o{ 376d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o errcode_t retval; 377d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o char *device_name; 378d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o ext2_filsys fs; 379d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 380d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (argc < 2) { 381d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o fprintf(stderr, "Usage: %s filesystem\n", argv[0]); 382d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o exit(1); 383d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o } 384d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o device_name = argv[1]; 385d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 386d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o retval = ext2fs_open (device_name, EXT2_FLAG_RW, 0, 0, 387d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o unix_io_manager, &fs); 388d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (retval) { 389d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o com_err(argv[0], retval, "while opening %s", device_name); 390d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o exit(1); 391d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o } 392d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 39331a17b36d5f7d875f9de8e86501eaf2338f94d2bTheodore Ts'o retval = ext2fs_add_journal_inode(fs, 1024); 394d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (retval) { 395d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o com_err(argv[0], retval, "while adding journal to %s", 396d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o device_name); 397d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o exit(1); 398d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o } 399d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o retval = ext2fs_flush(fs); 400d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (retval) { 401d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o printf("Warning, had trouble writing out superblocks.\n"); 402d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o } 403d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o ext2fs_close(fs); 404d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o exit(0); 405d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 406d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o} 407d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o#endif 408