1 files changed, 428 insertions, 0 deletions
diff --git a/e2fsprogs/old_e2fsprogs/ext2fs/mkjournal.c b/e2fsprogs/old_e2fsprogs/ext2fs/mkjournal.c
new file mode 100644
index 0000000..5bdd346
--- /dev/null
+++ b/e2fsprogs/old_e2fsprogs/ext2fs/mkjournal.c
@@ -0,0 +1,428 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * 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 "../e2fsck.h"
+#include "ext2fs.h"
+#include "kernel-jbd.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, &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		fd, ret_size;
+	blk_t		i;
+
+	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 != (int) 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 != (int) fs->blocksize)
+			goto errout;
+	}
+	close(fd);
+
+	retval = 0;
+errout:
+	ext2fs_free_mem(&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 EXT2FS_ATTR((unused)),
+			   int		ref_offset EXT2FS_ATTR((unused)),
+			   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;
+
+	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_block_alloc_stats(fs, new_blk, +1);
+
+	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;
+
+	memcpy(fs->super->s_jnl_blocks, inode.i_block, EXT2_N_BLOCKS*4);
+	fs->super->s_jnl_blocks[16] = inode.i_size;
+	fs->super->s_jnl_backup_type = EXT3_JNL_BACKUP_BLOCKS;
+	ext2fs_mark_super_dirty(fs);
+
+errout:
+	ext2fs_free_mem(&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		start;
+	__u32		i, 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) != (unsigned long) 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;
+
+	retval = ext2fs_check_mount_point(fs->device_name, &mount_flags,
+					       jfile, sizeof(jfile)-10);
+	if (retval)
+		return retval;
+
+	if (mount_flags & EXT2_MF_MOUNTED) {
+		strcat(jfile, "/.journal");
+
+		/*
+		 * If .../.journal already exists, make sure any
+		 * immutable or append-only flags are cleared.
+		 */
+#if defined(HAVE_CHFLAGS) && defined(UF_NODUMP)
+		(void) chflags (jfile, 0);
+#else
+#if HAVE_EXT2_IOCTLS
+		fd = open(jfile, O_RDONLY);
+		if (fd >= 0) {
+			f = 0;
+			ioctl(fd, EXT2_IOC_SETFLAGS, &f);
+			close(fd);
+		}
+#endif
+#endif
+
+		/* 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