mkjournal.c revision 020888625fb8f6d5293e67da95ae18c0af45aead
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 2817ee8b17f91988a3beedbd96eec4642e784f3251Theodore Ts'o#if HAVE_NETINET_IN_H 2917ee8b17f91988a3beedbd96eec4642e784f3251Theodore Ts'o#include <netinet/in.h> 3017ee8b17f91988a3beedbd96eec4642e784f3251Theodore Ts'o#endif 31d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 32d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o#if EXT2_FLAT_INCLUDES 33d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o#include "ext2_fs.h" 34d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o#else 35d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o#include <linux/ext2_fs.h> 36d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o#endif 37d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 38cdaf1fa78f6d63457eb5337c14b23e567d1346a7Theodore Ts'o#include "e2p/e2p.h" 39d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o#include "ext2fs.h" 40586187372afea65ae685687505b49b40fc5f3212Theodore Ts'o#include "jfs_user.h" 41d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 42a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o/* 43a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o * This function automatically sets up the journal superblock and 44a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o * returns it as an allocated block. 45a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o */ 46a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'oerrcode_t ext2fs_create_journal_superblock(ext2_filsys fs, 47a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o __u32 size, int flags, 48a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o char **ret_jsb) 49d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o{ 50a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o errcode_t retval; 51a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o journal_superblock_t *jsb; 52a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o 53a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o if ((retval = ext2fs_get_mem(fs->blocksize, (void **) &jsb))) 54a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o return retval; 55a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o 56a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o memset (jsb, 0, fs->blocksize); 57586187372afea65ae685687505b49b40fc5f3212Theodore Ts'o 58d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o jsb->s_header.h_magic = htonl(JFS_MAGIC_NUMBER); 594e246704eab31407ac15be9ab206c6f929507cf0Theodore Ts'o if (flags & EXT2_MKJOURNAL_V1_SUPER) 604e246704eab31407ac15be9ab206c6f929507cf0Theodore Ts'o jsb->s_header.h_blocktype = htonl(JFS_SUPERBLOCK_V1); 614e246704eab31407ac15be9ab206c6f929507cf0Theodore Ts'o else 624e246704eab31407ac15be9ab206c6f929507cf0Theodore Ts'o jsb->s_header.h_blocktype = htonl(JFS_SUPERBLOCK_V2); 63a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o jsb->s_blocksize = htonl(fs->blocksize); 64d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o jsb->s_maxlen = htonl(size); 65d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o jsb->s_first = htonl(1); 66d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o jsb->s_sequence = htonl(1); 67a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o memcpy(jsb->s_uuid, fs->super->s_uuid, sizeof(fs->super->s_uuid)); 68a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o jsb->s_nr_users = 1; 69a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o /* 70a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o * Now for the special settings if we're creating an external 71a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o * journal device 72a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o */ 73a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o if (fs->super->s_feature_incompat & 74a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) { 75a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o jsb->s_nr_users = 0; 76a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o jsb->s_first = htonl(fs->super->s_first_data_block+2); 77a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o } 78a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o 79a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o *ret_jsb = (char *) jsb; 80a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o return 0; 81d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o} 824becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 83d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o/* 844becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o * This function writes a journal using POSIX routines. It is used 854becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o * for creating external journals and creating journals on live 864becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o * filesystems. 87d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o */ 88a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'ostatic errcode_t write_journal_file(ext2_filsys fs, char *filename, 894e246704eab31407ac15be9ab206c6f929507cf0Theodore Ts'o blk_t size, int flags) 90d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o{ 91d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o errcode_t retval; 92d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o char *buf = 0; 93d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o int i, fd, ret_size; 94d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 95a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o if ((retval = ext2fs_create_journal_superblock(fs, size, flags, &buf))) 96a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o return retval; 97d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 98a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o /* Open the device or journal file */ 99a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o if ((fd = open(filename, O_WRONLY)) < 0) { 100d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o retval = errno; 101d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o goto errout; 102d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o } 103d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 104d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o /* Write the superblock out */ 105d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o retval = EXT2_ET_SHORT_WRITE; 106d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o ret_size = write(fd, buf, fs->blocksize); 107d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (ret_size < 0) { 108a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o retval = errno; 109d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o goto errout; 110d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o } 111d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (ret_size != fs->blocksize) 112d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o goto errout; 113d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o memset(buf, 0, fs->blocksize); 1144becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 1154becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o for (i = 1; i < size; i++) { 116d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o ret_size = write(fd, buf, fs->blocksize); 117d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (ret_size < 0) { 118d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o retval = errno; 119d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o goto errout; 120d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o } 121d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (ret_size != fs->blocksize) 122d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o goto errout; 123d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o } 124d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o close(fd); 125d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 1264becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o retval = 0; 127d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'oerrout: 128a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o ext2fs_free_mem((void **) &buf); 129d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o return retval; 130d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o} 131d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 132d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o/* 1334becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o * Helper function for creating the journal using direct I/O routines 134d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o */ 135d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'ostruct mkjournal_struct { 136d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o int num_blocks; 137d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o int newblocks; 138d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o char *buf; 139d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o errcode_t err; 140d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o}; 141d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 142d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'ostatic int mkjournal_proc(ext2_filsys fs, 143d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o blk_t *blocknr, 144d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o e2_blkcnt_t blockcnt, 145d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o blk_t ref_block, 146d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o int ref_offset, 147d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o void *priv_data) 148d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o{ 149d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o struct mkjournal_struct *es = (struct mkjournal_struct *) priv_data; 150d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o blk_t new_blk; 151d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o static blk_t last_blk = 0; 152d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o errcode_t retval; 153d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o int group; 154d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 155d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (*blocknr) { 156d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o last_blk = *blocknr; 157d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o return 0; 158d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o } 159d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o retval = ext2fs_new_block(fs, last_blk, 0, &new_blk); 160d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (retval) { 161d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o es->err = retval; 162d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o return BLOCK_ABORT; 163d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o } 164d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (blockcnt > 0) 165d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o es->num_blocks--; 166d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 167d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o es->newblocks++; 168d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o retval = io_channel_write_blk(fs->io, new_blk, 1, es->buf); 169d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 170d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (blockcnt == 0) 171d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o memset(es->buf, 0, fs->blocksize); 172d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 173d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (retval) { 174d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o es->err = retval; 175d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o return BLOCK_ABORT; 176d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o } 177d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o *blocknr = new_blk; 178d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o ext2fs_mark_block_bitmap(fs->block_map, new_blk); 179d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o ext2fs_mark_bb_dirty(fs); 180d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o group = ext2fs_group_of_blk(fs, new_blk); 181d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o fs->group_desc[group].bg_free_blocks_count--; 182d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o fs->super->s_free_blocks_count--; 183d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o ext2fs_mark_super_dirty(fs); 184d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 185d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (es->num_blocks == 0) 186d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o return (BLOCK_CHANGED | BLOCK_ABORT); 187d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o else 188d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o return BLOCK_CHANGED; 189d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 190d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o} 191d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 192d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o/* 1934becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o * This function creates a journal using direct I/O routines. 194d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o */ 19531dbecd482405e0d3a67eb58e1a1c8cb9f2ad83eTheodore Ts'ostatic errcode_t write_journal_inode(ext2_filsys fs, ext2_ino_t journal_ino, 1964becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o blk_t size, int flags) 197d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o{ 198a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o char *buf; 199d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o errcode_t retval; 200d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o struct ext2_inode inode; 201d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o struct mkjournal_struct es; 202d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 203a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o if ((retval = ext2fs_create_journal_superblock(fs, size, flags, &buf))) 204a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o return retval; 205a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o 206d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if ((retval = ext2fs_read_bitmaps(fs))) 207d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o return retval; 208d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 2094becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o if ((retval = ext2fs_read_inode(fs, journal_ino, &inode))) 210d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o return retval; 211d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 212d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (inode.i_blocks > 0) 213d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o return EEXIST; 214d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 215d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o es.num_blocks = size; 216d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o es.newblocks = 0; 217d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o es.buf = buf; 218d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o es.err = 0; 219d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 2204becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o retval = ext2fs_block_iterate2(fs, journal_ino, BLOCK_FLAG_APPEND, 221d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 0, mkjournal_proc, &es); 222a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o if (es.err) { 223a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o retval = es.err; 224a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o goto errout; 225a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o } 226d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 2274becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o if ((retval = ext2fs_read_inode(fs, journal_ino, &inode))) 228a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o goto errout; 229d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 230d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o inode.i_size += fs->blocksize * size; 231d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o inode.i_blocks += (fs->blocksize / 512) * es.newblocks; 232d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o inode.i_mtime = inode.i_ctime = time(0); 233d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o inode.i_links_count = 1; 234d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o inode.i_mode = LINUX_S_IFREG | 0600; 235d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 2364becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o if ((retval = ext2fs_write_inode(fs, journal_ino, &inode))) 237a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o goto errout; 238a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o retval = 0; 239d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 240a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'oerrout: 241a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o ext2fs_free_mem((void **) &buf); 242a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o return retval; 2434becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o} 2444becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 2454becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o/* 2464becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o * This function adds a journal device to a filesystem 2474becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o */ 248a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'oerrcode_t ext2fs_add_journal_device(ext2_filsys fs, ext2_filsys journal_dev) 2494becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o{ 2504becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o struct stat st; 2514becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o errcode_t retval; 252a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o char buf[1024]; 253a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o journal_superblock_t *jsb; 254a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o int i; 255a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o __u32 nr_users; 2564becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 2574becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o /* Make sure the device exists and is a block device */ 258020888625fb8f6d5293e67da95ae18c0af45aeadTheodore Ts'o if (stat(journal_dev->device_name, &st) < 0) 2594becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o return errno; 260a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o 2614becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o if (!S_ISBLK(st.st_mode)) 2624becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o return EXT2_JOURNAL_NOT_BLOCK; /* Must be a block device */ 2634becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 264a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o /* Get the journal superblock */ 265a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o if ((retval = io_channel_read_blk(journal_dev->io, 1, -1024, buf))) 2664becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o return retval; 2674becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 268a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o jsb = (journal_superblock_t *) buf; 269a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) || 270a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o (jsb->s_header.h_blocktype != (unsigned) ntohl(JFS_SUPERBLOCK_V2))) 271a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o return EXT2_NO_JOURNAL_SB; 272a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o 273a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o if (ntohl(jsb->s_blocksize) != fs->blocksize) 274a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o return EXT2_ET_UNEXPECTED_BLOCK_SIZE; 275a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o 276a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o /* Check and see if this filesystem has already been added */ 277a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o nr_users = ntohl(jsb->s_nr_users); 278a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o for (i=0; i < nr_users; i++) { 279a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o if (memcmp(fs->super->s_uuid, 280a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o &jsb->s_users[i*16], 16) == 0) 281a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o break; 282a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o } 283a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o if (i >= nr_users) { 284a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o memcpy(&jsb->s_users[nr_users*16], 285a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o fs->super->s_uuid, 16); 286a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o jsb->s_nr_users = htonl(nr_users+1); 287a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o } 2884becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 289a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o /* Writeback the journal superblock */ 290a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o if ((retval = io_channel_write_blk(journal_dev->io, 1, -1024, buf))) 2914becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o return retval; 2924becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 2934becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o fs->super->s_journal_inum = 0; 2944becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o fs->super->s_journal_dev = st.st_rdev; 295a112847b39386f9e7332ba5e5a0a5e54cfe301ccTheodore Ts'o memcpy(fs->super->s_journal_uuid, jsb->s_uuid, 2964becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o sizeof(fs->super->s_journal_uuid)); 2974becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o fs->super->s_feature_compat |= EXT3_FEATURE_COMPAT_HAS_JOURNAL; 2984becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o ext2fs_mark_super_dirty(fs); 299cdaf1fa78f6d63457eb5337c14b23e567d1346a7Theodore Ts'o return 0; 3004becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o} 3014becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 3024becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o/* 3034becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o * This function adds a journal inode to a filesystem, using either 3044becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o * POSIX routines if the filesystem is mounted, or using direct I/O 3054becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o * functions if it is not. 3064becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o */ 3074becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'oerrcode_t ext2fs_add_journal_inode(ext2_filsys fs, blk_t size, int flags) 3084becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o{ 3094becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o errcode_t retval; 31031dbecd482405e0d3a67eb58e1a1c8cb9f2ad83eTheodore Ts'o ext2_ino_t journal_ino; 3114becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o struct stat st; 3124becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o char jfile[1024]; 3134becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o int fd, mount_flags; 3144becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 315cdaf1fa78f6d63457eb5337c14b23e567d1346a7Theodore Ts'o if ((retval = ext2fs_check_mount_point(fs->device_name, &mount_flags, 316cdaf1fa78f6d63457eb5337c14b23e567d1346a7Theodore Ts'o jfile, sizeof(jfile)-10))) 3174becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o return retval; 3184becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 3194becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o if (mount_flags & EXT2_MF_MOUNTED) { 3204becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o strcat(jfile, "/.journal"); 3214becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 3224becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o /* Create the journal file */ 3234becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o if ((fd = open(jfile, O_CREAT|O_WRONLY, 0600)) < 0) 3244becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o return errno; 3254becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o close(fd); 3264becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 3274becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o if ((retval = write_journal_file(fs, jfile, size, flags))) 3284becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o return retval; 3294becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 3304becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o /* Get inode number of the journal file */ 3314becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o if (stat(jfile, &st) < 0) 3324becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o return errno; 3334becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 3344becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o if ((retval = fsetflags(jfile, 3354becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o EXT2_NODUMP_FL | EXT2_IMMUTABLE_FL))) 3364becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o return retval; 3374becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 3384becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o journal_ino = st.st_ino; 3394becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o } else { 3404becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o journal_ino = EXT2_JOURNAL_INO; 3414becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o if ((retval = write_journal_inode(fs, journal_ino, 3424becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o size, flags))) 3434becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o return retval; 3444becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o } 3454becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o 3464becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o fs->super->s_journal_inum = journal_ino; 3474becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o fs->super->s_journal_dev = 0; 3484becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o memset(fs->super->s_journal_uuid, 0, 3494becab6824aa5fdb022a293ae0b4622784496256Theodore Ts'o sizeof(fs->super->s_journal_uuid)); 350d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o fs->super->s_feature_compat |= EXT3_FEATURE_COMPAT_HAS_JOURNAL; 351d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 352d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o ext2fs_mark_super_dirty(fs); 353d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o return 0; 354d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o} 355d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 356d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o#ifdef DEBUG 357d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'omain(int argc, char **argv) 358d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o{ 359d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o errcode_t retval; 360d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o char *device_name; 361d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o ext2_filsys fs; 362d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 363d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (argc < 2) { 364d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o fprintf(stderr, "Usage: %s filesystem\n", argv[0]); 365d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o exit(1); 366d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o } 367d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o device_name = argv[1]; 368d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 369d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o retval = ext2fs_open (device_name, EXT2_FLAG_RW, 0, 0, 370d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o unix_io_manager, &fs); 371d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (retval) { 372d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o com_err(argv[0], retval, "while opening %s", device_name); 373d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o exit(1); 374d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o } 375d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 37631a17b36d5f7d875f9de8e86501eaf2338f94d2bTheodore Ts'o retval = ext2fs_add_journal_inode(fs, 1024); 377d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (retval) { 378d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o com_err(argv[0], retval, "while adding journal to %s", 379d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o device_name); 380d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o exit(1); 381d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o } 382d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o retval = ext2fs_flush(fs); 383d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o if (retval) { 384d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o printf("Warning, had trouble writing out superblocks.\n"); 385d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o } 386d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o ext2fs_close(fs); 387d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o exit(0); 388d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o 389d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o} 390d3cd93cabeac8c153c8ae7b1b7358d6ced86b15eTheodore Ts'o#endif 391