mkjournal.c revision 7833262585b0f9f85915c387fa35708cf3ff3609
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 & 757a34cb01a97d39842c610dd609b525eadd0a1de2Theodore Ts'o EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) 76a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o jsb->s_nr_users = 0; 77a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o 78a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o *ret_jsb = (char *) jsb; 79a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o return 0; 80d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o} 814becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 82d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o/* 834becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o * This function writes a journal using POSIX routines. It is used 844becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o * for creating external journals and creating journals on live 854becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o * filesystems. 86d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o */ 87a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'ostatic errcode_t write_journal_file(ext2_filsys fs, char *filename, 884e246704eab31407ac15be9ab206c6f929507cf0Theodore Ts'o blk_t size, int flags) 89d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o{ 90d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o errcode_t retval; 91d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o char *buf = 0; 92d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o int i, fd, ret_size; 93d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 94a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o if ((retval = ext2fs_create_journal_superblock(fs, size, flags, &buf))) 95a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o return retval; 96d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 97a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o /* Open the device or journal file */ 98a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o if ((fd = open(filename, O_WRONLY)) < 0) { 99d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o retval = errno; 100d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o goto errout; 101d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o } 102d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 103d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o /* Write the superblock out */ 104d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o retval = EXT2_ET_SHORT_WRITE; 105d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o ret_size = write(fd, buf, fs->blocksize); 106d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (ret_size < 0) { 107a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o retval = errno; 108d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o goto errout; 109d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o } 110d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (ret_size != fs->blocksize) 111d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o goto errout; 112d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o memset(buf, 0, fs->blocksize); 1134becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 1144becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o for (i = 1; i < size; i++) { 115d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o ret_size = write(fd, buf, fs->blocksize); 116d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (ret_size < 0) { 117d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o retval = errno; 118d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o goto errout; 119d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o } 120d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (ret_size != fs->blocksize) 121d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o goto errout; 122d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o } 123d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o close(fd); 124d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 1254becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o retval = 0; 126d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'oerrout: 127a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o ext2fs_free_mem((void **) &buf); 128d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o return retval; 129d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o} 130d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 131d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o/* 1324becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o * Helper function for creating the journal using direct I/O routines 133d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o */ 134d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'ostruct mkjournal_struct { 135d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o int num_blocks; 136d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o int newblocks; 137d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o char *buf; 138d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o errcode_t err; 139d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o}; 140d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 141d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'ostatic int mkjournal_proc(ext2_filsys fs, 142d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o blk_t *blocknr, 143d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o e2_blkcnt_t blockcnt, 144d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o blk_t ref_block, 145d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o int ref_offset, 146d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o void *priv_data) 147d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o{ 148d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o struct mkjournal_struct *es = (struct mkjournal_struct *) priv_data; 149d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o blk_t new_blk; 150d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o static blk_t last_blk = 0; 151d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o errcode_t retval; 152d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o int group; 153d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 154d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (*blocknr) { 155d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o last_blk = *blocknr; 156d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o return 0; 157d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o } 158d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o retval = ext2fs_new_block(fs, last_blk, 0, &new_blk); 159d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (retval) { 160d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o es->err = retval; 161d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o return BLOCK_ABORT; 162d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o } 163d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (blockcnt > 0) 164d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o es->num_blocks--; 165d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 166d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o es->newblocks++; 167d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o retval = io_channel_write_blk(fs->io, new_blk, 1, es->buf); 168d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 169d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (blockcnt == 0) 170d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o memset(es->buf, 0, fs->blocksize); 171d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 172d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (retval) { 173d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o es->err = retval; 174d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o return BLOCK_ABORT; 175d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o } 176d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o *blocknr = new_blk; 177d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o ext2fs_mark_block_bitmap(fs->block_map, new_blk); 178d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o ext2fs_mark_bb_dirty(fs); 179d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o group = ext2fs_group_of_blk(fs, new_blk); 180d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o fs->group_desc[group].bg_free_blocks_count--; 181d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o fs->super->s_free_blocks_count--; 182d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o ext2fs_mark_super_dirty(fs); 183d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 184d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (es->num_blocks == 0) 185d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o return (BLOCK_CHANGED | BLOCK_ABORT); 186d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o else 187d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o return BLOCK_CHANGED; 188d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 189d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o} 190d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 191d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o/* 1924becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o * This function creates a journal using direct I/O routines. 193d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o */ 19431dbecd482405e0d3a67eb58e1a1c8cb9f2ad83eTheodore Ts'ostatic errcode_t write_journal_inode(ext2_filsys fs, ext2_ino_t journal_ino, 1954becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o blk_t size, int flags) 196d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o{ 197a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o char *buf; 198d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o errcode_t retval; 199d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o struct ext2_inode inode; 200d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o struct mkjournal_struct es; 201d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 202a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o if ((retval = ext2fs_create_journal_superblock(fs, size, flags, &buf))) 203a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o return retval; 204a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o 205d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if ((retval = ext2fs_read_bitmaps(fs))) 206d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o return retval; 207d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 2084becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o if ((retval = ext2fs_read_inode(fs, journal_ino, &inode))) 209d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o return retval; 210d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 211d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (inode.i_blocks > 0) 212d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o return EEXIST; 213d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 214d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o es.num_blocks = size; 215d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o es.newblocks = 0; 216d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o es.buf = buf; 217d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o es.err = 0; 218d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 2194becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o retval = ext2fs_block_iterate2(fs, journal_ino, BLOCK_FLAG_APPEND, 220d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 0, mkjournal_proc, &es); 221a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o if (es.err) { 222a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o retval = es.err; 223a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o goto errout; 224a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o } 225d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 2264becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o if ((retval = ext2fs_read_inode(fs, journal_ino, &inode))) 227a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o goto errout; 228d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 229d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o inode.i_size += fs->blocksize * size; 230d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o inode.i_blocks += (fs->blocksize / 512) * es.newblocks; 231d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o inode.i_mtime = inode.i_ctime = time(0); 232d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o inode.i_links_count = 1; 233d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o inode.i_mode = LINUX_S_IFREG | 0600; 234d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 2354becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o if ((retval = ext2fs_write_inode(fs, journal_ino, &inode))) 236a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o goto errout; 237a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o retval = 0; 238d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 239a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'oerrout: 240a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o ext2fs_free_mem((void **) &buf); 241a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o return retval; 2424becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o} 2434becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 2444becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o/* 2454becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o * This function adds a journal device to a filesystem 2464becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o */ 247a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'oerrcode_t ext2fs_add_journal_device(ext2_filsys fs, ext2_filsys journal_dev) 2484becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o{ 2494becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o struct stat st; 2504becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o errcode_t retval; 251a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o char buf[1024]; 252a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o journal_superblock_t *jsb; 253a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o int i; 254a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o __u32 nr_users; 2554becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 2564becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o /* Make sure the device exists and is a block device */ 257020888625fb8f6d5293e67da95ae18c0af45aeadTheodore Ts'o if (stat(journal_dev->device_name, &st) < 0) 2584becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o return errno; 259a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o 2604becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o if (!S_ISBLK(st.st_mode)) 261036039460ff76f397bc23977a26632698136b0e6Theodore Ts'o return EXT2_ET_JOURNAL_NOT_BLOCK; /* Must be a block device */ 2624becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 263a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o /* Get the journal superblock */ 264a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o if ((retval = io_channel_read_blk(journal_dev->io, 1, -1024, buf))) 2654becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o return retval; 2664becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 267a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o jsb = (journal_superblock_t *) buf; 268a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) || 269a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o (jsb->s_header.h_blocktype != (unsigned) ntohl(JFS_SUPERBLOCK_V2))) 270036039460ff76f397bc23977a26632698136b0e6Theodore Ts'o return EXT2_ET_NO_JOURNAL_SB; 271a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o 272a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o if (ntohl(jsb->s_blocksize) != fs->blocksize) 273a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o return EXT2_ET_UNEXPECTED_BLOCK_SIZE; 274a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o 275a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o /* Check and see if this filesystem has already been added */ 276a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o nr_users = ntohl(jsb->s_nr_users); 277a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o for (i=0; i < nr_users; i++) { 278a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o if (memcmp(fs->super->s_uuid, 279a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o &jsb->s_users[i*16], 16) == 0) 280a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o break; 281a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o } 282a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o if (i >= nr_users) { 283a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o memcpy(&jsb->s_users[nr_users*16], 284a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o fs->super->s_uuid, 16); 285a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o jsb->s_nr_users = htonl(nr_users+1); 286a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o } 2874becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 288a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o /* Writeback the journal superblock */ 289a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o if ((retval = io_channel_write_blk(journal_dev->io, 1, -1024, buf))) 2904becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o return retval; 2914becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 2924becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o fs->super->s_journal_inum = 0; 2934becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o fs->super->s_journal_dev = st.st_rdev; 294a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o memcpy(fs->super->s_journal_uuid, jsb->s_uuid, 2954becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o sizeof(fs->super->s_journal_uuid)); 2964becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o fs->super->s_feature_compat |= EXT3_FEATURE_COMPAT_HAS_JOURNAL; 2974becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o ext2fs_mark_super_dirty(fs); 298cdaf1fa78f6d63457eb5337c14b23e567d1346a7Theodore Ts'o return 0; 2994becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o} 3004becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 3014becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o/* 3024becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o * This function adds a journal inode to a filesystem, using either 3034becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o * POSIX routines if the filesystem is mounted, or using direct I/O 3044becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o * functions if it is not. 3054becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o */ 3064becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'oerrcode_t ext2fs_add_journal_inode(ext2_filsys fs, blk_t size, int flags) 3074becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o{ 3084becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o errcode_t retval; 30931dbecd482405e0d3a67eb58e1a1c8cb9f2ad83eTheodore Ts'o ext2_ino_t journal_ino; 3104becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o struct stat st; 3114becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o char jfile[1024]; 312349a484a57ab13fed315f72552bdf8dbf89ba72aTheodore Ts'o int fd, mount_flags, f; 3134becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 314cdaf1fa78f6d63457eb5337c14b23e567d1346a7Theodore Ts'o if ((retval = ext2fs_check_mount_point(fs->device_name, &mount_flags, 315cdaf1fa78f6d63457eb5337c14b23e567d1346a7Theodore Ts'o jfile, sizeof(jfile)-10))) 3164becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o return retval; 3174becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 3184becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o if (mount_flags & EXT2_MF_MOUNTED) { 3194becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o strcat(jfile, "/.journal"); 3204becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 3214becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o /* Create the journal file */ 3224becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o if ((fd = open(jfile, O_CREAT|O_WRONLY, 0600)) < 0) 3234becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o return errno; 3244becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o close(fd); 3254becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 3264becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o if ((retval = write_journal_file(fs, jfile, size, flags))) 3274becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o return retval; 3284becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 3294becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o /* Get inode number of the journal file */ 330349a484a57ab13fed315f72552bdf8dbf89ba72aTheodore Ts'o if (fstat(fd, &st) < 0) 3314becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o return errno; 3324becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 3337833262585b0f9f85915c387fa35708cf3ff3609Theodore Ts'o#if defined(HAVE_CHFLAGS) && defined(UF_NODUMP) 334349a484a57ab13fed315f72552bdf8dbf89ba72aTheodore Ts'o retval = fchflags (fd, UF_NODUMP|UF_IMMUTABLE); 335349a484a57ab13fed315f72552bdf8dbf89ba72aTheodore Ts'o#else 336349a484a57ab13fed315f72552bdf8dbf89ba72aTheodore Ts'o#if HAVE_EXT2_IOCTLS 337349a484a57ab13fed315f72552bdf8dbf89ba72aTheodore Ts'o f = EXT2_NODUMP_FL | EXT2_IMMUTABLE_FL;; 338349a484a57ab13fed315f72552bdf8dbf89ba72aTheodore Ts'o retval = ioctl(fd, EXT2_IOC_SETFLAGS, &f); 339349a484a57ab13fed315f72552bdf8dbf89ba72aTheodore Ts'o#endif 340349a484a57ab13fed315f72552bdf8dbf89ba72aTheodore Ts'o#endif 341349a484a57ab13fed315f72552bdf8dbf89ba72aTheodore Ts'o if (retval) 3424becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o return retval; 343349a484a57ab13fed315f72552bdf8dbf89ba72aTheodore Ts'o 3444becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o journal_ino = st.st_ino; 3454becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o } else { 3464becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o journal_ino = EXT2_JOURNAL_INO; 3474becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o if ((retval = write_journal_inode(fs, journal_ino, 3484becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o size, flags))) 3494becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o return retval; 3504becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o } 3514becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 3524becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o fs->super->s_journal_inum = journal_ino; 3534becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o fs->super->s_journal_dev = 0; 3544becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o memset(fs->super->s_journal_uuid, 0, 3554becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o sizeof(fs->super->s_journal_uuid)); 356d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o fs->super->s_feature_compat |= EXT3_FEATURE_COMPAT_HAS_JOURNAL; 357d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 358d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o ext2fs_mark_super_dirty(fs); 359d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o return 0; 360d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o} 361d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 362d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o#ifdef DEBUG 363d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'omain(int argc, char **argv) 364d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o{ 365d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o errcode_t retval; 366d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o char *device_name; 367d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o ext2_filsys fs; 368d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 369d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (argc < 2) { 370d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o fprintf(stderr, "Usage: %s filesystem\n", argv[0]); 371d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o exit(1); 372d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o } 373d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o device_name = argv[1]; 374d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 375d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o retval = ext2fs_open (device_name, EXT2_FLAG_RW, 0, 0, 376d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o unix_io_manager, &fs); 377d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (retval) { 378d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o com_err(argv[0], retval, "while opening %s", device_name); 379d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o exit(1); 380d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o } 381d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 38231a17b36d5f7d875f9de8e86501eaf2338f94d2bTheodore Ts'o retval = ext2fs_add_journal_inode(fs, 1024); 383d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (retval) { 384d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o com_err(argv[0], retval, "while adding journal to %s", 385d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o device_name); 386d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o exit(1); 387d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o } 388d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o retval = ext2fs_flush(fs); 389d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (retval) { 390d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o printf("Warning, had trouble writing out superblocks.\n"); 391d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o } 392d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o ext2fs_close(fs); 393d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o exit(0); 394d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 395d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o} 396d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o#endif 397