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-rw-r--r--e2fslib/mkjournal.c408
1 files changed, 0 insertions, 408 deletions
diff --git a/e2fslib/mkjournal.c b/e2fslib/mkjournal.c
deleted file mode 100644
index 606501d..0000000
--- a/e2fslib/mkjournal.c
+++ /dev/null
@@ -1,408 +0,0 @@
-/*
- * mkjournal.c --- make a journal for a filesystem
- *
- * Copyright (C) 2000 Theodore Ts'o.
- *
- * %Begin-Header%
- * This file may be redistributed under the terms of the GNU Public
- * License.
- * %End-Header%
- */
-
-#include <stdio.h>
-#include <string.h>
-#if HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-#if HAVE_ERRNO_H
-#include <errno.h>
-#endif
-#include <fcntl.h>
-#include <time.h>
-#if HAVE_SYS_STAT_H
-#include <sys/stat.h>
-#endif
-#if HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-#if HAVE_SYS_IOCTL_H
-#include <sys/ioctl.h>
-#endif
-#if HAVE_NETINET_IN_H
-#include <netinet/in.h>
-#endif
-
-#include "ext2_fs.h"
-#include "e2p/e2p.h"
-#include "ext2fs.h"
-#include "jfs_user.h"
-
-/*
- * This function automatically sets up the journal superblock and
- * returns it as an allocated block.
- */
-errcode_t ext2fs_create_journal_superblock(ext2_filsys fs,
- __u32 size, int flags,
- char **ret_jsb)
-{
- errcode_t retval;
- journal_superblock_t *jsb;
-
- if (size < 1024)
- return EXT2_ET_JOURNAL_TOO_SMALL;
-
- if ((retval = ext2fs_get_mem(fs->blocksize, (void **) &jsb)))
- return retval;
-
- memset (jsb, 0, fs->blocksize);
-
- jsb->s_header.h_magic = htonl(JFS_MAGIC_NUMBER);
- if (flags & EXT2_MKJOURNAL_V1_SUPER)
- jsb->s_header.h_blocktype = htonl(JFS_SUPERBLOCK_V1);
- else
- jsb->s_header.h_blocktype = htonl(JFS_SUPERBLOCK_V2);
- jsb->s_blocksize = htonl(fs->blocksize);
- jsb->s_maxlen = htonl(size);
- jsb->s_nr_users = htonl(1);
- jsb->s_first = htonl(1);
- jsb->s_sequence = htonl(1);
- memcpy(jsb->s_uuid, fs->super->s_uuid, sizeof(fs->super->s_uuid));
- /*
- * If we're creating an external journal device, we need to
- * adjust these fields.
- */
- if (fs->super->s_feature_incompat &
- EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) {
- jsb->s_nr_users = 0;
- if (fs->blocksize == 1024)
- jsb->s_first = htonl(3);
- else
- jsb->s_first = htonl(2);
- }
-
- *ret_jsb = (char *) jsb;
- return 0;
-}
-
-/*
- * This function writes a journal using POSIX routines. It is used
- * for creating external journals and creating journals on live
- * filesystems.
- */
-static errcode_t write_journal_file(ext2_filsys fs, char *filename,
- blk_t size, int flags)
-{
- errcode_t retval;
- char *buf = 0;
- int i, fd, ret_size;
-
- if ((retval = ext2fs_create_journal_superblock(fs, size, flags, &buf)))
- return retval;
-
- /* Open the device or journal file */
- if ((fd = open(filename, O_WRONLY)) < 0) {
- retval = errno;
- goto errout;
- }
-
- /* Write the superblock out */
- retval = EXT2_ET_SHORT_WRITE;
- ret_size = write(fd, buf, fs->blocksize);
- if (ret_size < 0) {
- retval = errno;
- goto errout;
- }
- if (ret_size != fs->blocksize)
- goto errout;
- memset(buf, 0, fs->blocksize);
-
- for (i = 1; i < size; i++) {
- ret_size = write(fd, buf, fs->blocksize);
- if (ret_size < 0) {
- retval = errno;
- goto errout;
- }
- if (ret_size != fs->blocksize)
- goto errout;
- }
- close(fd);
-
- retval = 0;
-errout:
- ext2fs_free_mem((void **) &buf);
- return retval;
-}
-
-/*
- * Helper function for creating the journal using direct I/O routines
- */
-struct mkjournal_struct {
- int num_blocks;
- int newblocks;
- char *buf;
- errcode_t err;
-};
-
-static int mkjournal_proc(ext2_filsys fs,
- blk_t *blocknr,
- e2_blkcnt_t blockcnt,
- blk_t ref_block,
- int ref_offset,
- void *priv_data)
-{
- struct mkjournal_struct *es = (struct mkjournal_struct *) priv_data;
- blk_t new_blk;
- static blk_t last_blk = 0;
- errcode_t retval;
- int group;
-
- if (*blocknr) {
- last_blk = *blocknr;
- return 0;
- }
- retval = ext2fs_new_block(fs, last_blk, 0, &new_blk);
- if (retval) {
- es->err = retval;
- return BLOCK_ABORT;
- }
- if (blockcnt > 0)
- es->num_blocks--;
-
- es->newblocks++;
- retval = io_channel_write_blk(fs->io, new_blk, 1, es->buf);
-
- if (blockcnt == 0)
- memset(es->buf, 0, fs->blocksize);
-
- if (retval) {
- es->err = retval;
- return BLOCK_ABORT;
- }
- *blocknr = new_blk;
- last_blk = new_blk;
- ext2fs_mark_block_bitmap(fs->block_map, new_blk);
- ext2fs_mark_bb_dirty(fs);
- group = ext2fs_group_of_blk(fs, new_blk);
- fs->group_desc[group].bg_free_blocks_count--;
- fs->super->s_free_blocks_count--;
- ext2fs_mark_super_dirty(fs);
-
- if (es->num_blocks == 0)
- return (BLOCK_CHANGED | BLOCK_ABORT);
- else
- return BLOCK_CHANGED;
-
-}
-
-/*
- * This function creates a journal using direct I/O routines.
- */
-static errcode_t write_journal_inode(ext2_filsys fs, ext2_ino_t journal_ino,
- blk_t size, int flags)
-{
- char *buf;
- errcode_t retval;
- struct ext2_inode inode;
- struct mkjournal_struct es;
-
- if ((retval = ext2fs_create_journal_superblock(fs, size, flags, &buf)))
- return retval;
-
- if ((retval = ext2fs_read_bitmaps(fs)))
- return retval;
-
- if ((retval = ext2fs_read_inode(fs, journal_ino, &inode)))
- return retval;
-
- if (inode.i_blocks > 0)
- return EEXIST;
-
- es.num_blocks = size;
- es.newblocks = 0;
- es.buf = buf;
- es.err = 0;
-
- retval = ext2fs_block_iterate2(fs, journal_ino, BLOCK_FLAG_APPEND,
- 0, mkjournal_proc, &es);
- if (es.err) {
- retval = es.err;
- goto errout;
- }
-
- if ((retval = ext2fs_read_inode(fs, journal_ino, &inode)))
- goto errout;
-
- inode.i_size += fs->blocksize * size;
- inode.i_blocks += (fs->blocksize / 512) * es.newblocks;
- inode.i_mtime = inode.i_ctime = time(0);
- inode.i_links_count = 1;
- inode.i_mode = LINUX_S_IFREG | 0600;
-
- if ((retval = ext2fs_write_inode(fs, journal_ino, &inode)))
- goto errout;
- retval = 0;
-
-errout:
- ext2fs_free_mem((void **) &buf);
- return retval;
-}
-
-/*
- * This function adds a journal device to a filesystem
- */
-errcode_t ext2fs_add_journal_device(ext2_filsys fs, ext2_filsys journal_dev)
-{
- struct stat st;
- errcode_t retval;
- char buf[1024];
- journal_superblock_t *jsb;
- int i, start;
- __u32 nr_users;
-
- /* Make sure the device exists and is a block device */
- if (stat(journal_dev->device_name, &st) < 0)
- return errno;
-
- if (!S_ISBLK(st.st_mode))
- return EXT2_ET_JOURNAL_NOT_BLOCK; /* Must be a block device */
-
- /* Get the journal superblock */
- start = 1;
- if (journal_dev->blocksize == 1024)
- start++;
- if ((retval = io_channel_read_blk(journal_dev->io, start, -1024, buf)))
- return retval;
-
- jsb = (journal_superblock_t *) buf;
- if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) ||
- (jsb->s_header.h_blocktype != (unsigned) ntohl(JFS_SUPERBLOCK_V2)))
- return EXT2_ET_NO_JOURNAL_SB;
-
- if (ntohl(jsb->s_blocksize) != fs->blocksize)
- return EXT2_ET_UNEXPECTED_BLOCK_SIZE;
-
- /* Check and see if this filesystem has already been added */
- nr_users = ntohl(jsb->s_nr_users);
- for (i=0; i < nr_users; i++) {
- if (memcmp(fs->super->s_uuid,
- &jsb->s_users[i*16], 16) == 0)
- break;
- }
- if (i >= nr_users) {
- memcpy(&jsb->s_users[nr_users*16],
- fs->super->s_uuid, 16);
- jsb->s_nr_users = htonl(nr_users+1);
- }
-
- /* Writeback the journal superblock */
- if ((retval = io_channel_write_blk(journal_dev->io, start, -1024, buf)))
- return retval;
-
- fs->super->s_journal_inum = 0;
- fs->super->s_journal_dev = st.st_rdev;
- memcpy(fs->super->s_journal_uuid, jsb->s_uuid,
- sizeof(fs->super->s_journal_uuid));
- fs->super->s_feature_compat |= EXT3_FEATURE_COMPAT_HAS_JOURNAL;
- ext2fs_mark_super_dirty(fs);
- return 0;
-}
-
-/*
- * This function adds a journal inode to a filesystem, using either
- * POSIX routines if the filesystem is mounted, or using direct I/O
- * functions if it is not.
- */
-errcode_t ext2fs_add_journal_inode(ext2_filsys fs, blk_t size, int flags)
-{
- errcode_t retval;
- ext2_ino_t journal_ino;
- struct stat st;
- char jfile[1024];
- int fd, mount_flags, f;
-
- if ((retval = ext2fs_check_mount_point(fs->device_name, &mount_flags,
- jfile, sizeof(jfile)-10)))
- return retval;
-
- if (mount_flags & EXT2_MF_MOUNTED) {
- strcat(jfile, "/.journal");
-
- /* Create the journal file */
- if ((fd = open(jfile, O_CREAT|O_WRONLY, 0600)) < 0)
- return errno;
-
- if ((retval = write_journal_file(fs, jfile, size, flags)))
- goto errout;
-
- /* Get inode number of the journal file */
- if (fstat(fd, &st) < 0)
- goto errout;
-
-#if defined(HAVE_CHFLAGS) && defined(UF_NODUMP)
- retval = fchflags (fd, UF_NODUMP|UF_IMMUTABLE);
-#else
-#if HAVE_EXT2_IOCTLS
- f = EXT2_NODUMP_FL | EXT2_IMMUTABLE_FL;;
- retval = ioctl(fd, EXT2_IOC_SETFLAGS, &f);
-#endif
-#endif
- if (retval)
- goto errout;
-
- close(fd);
- journal_ino = st.st_ino;
- } else {
- journal_ino = EXT2_JOURNAL_INO;
- if ((retval = write_journal_inode(fs, journal_ino,
- size, flags)))
- return retval;
- }
-
- fs->super->s_journal_inum = journal_ino;
- fs->super->s_journal_dev = 0;
- memset(fs->super->s_journal_uuid, 0,
- sizeof(fs->super->s_journal_uuid));
- fs->super->s_feature_compat |= EXT3_FEATURE_COMPAT_HAS_JOURNAL;
-
- ext2fs_mark_super_dirty(fs);
- return 0;
-errout:
- close(fd);
- return retval;
-}
-
-#ifdef DEBUG
-main(int argc, char **argv)
-{
- errcode_t retval;
- char *device_name;
- ext2_filsys fs;
-
- if (argc < 2) {
- fprintf(stderr, "Usage: %s filesystem\n", argv[0]);
- exit(1);
- }
- device_name = argv[1];
-
- retval = ext2fs_open (device_name, EXT2_FLAG_RW, 0, 0,
- unix_io_manager, &fs);
- if (retval) {
- com_err(argv[0], retval, "while opening %s", device_name);
- exit(1);
- }
-
- retval = ext2fs_add_journal_inode(fs, 1024);
- if (retval) {
- com_err(argv[0], retval, "while adding journal to %s",
- device_name);
- exit(1);
- }
- retval = ext2fs_flush(fs);
- if (retval) {
- printf("Warning, had trouble writing out superblocks.\n");
- }
- ext2fs_close(fs);
- exit(0);
-
-}
-#endif