Ejemplo n.º 1
0
errcode_t ext2fs_close2(ext2_filsys fs, int flags)
{
	errcode_t	retval;
	int		meta_blks;
	io_stats stats = 0;

	EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);

	if (fs->write_bitmaps) {
		retval = fs->write_bitmaps(fs);
		if (retval)
			return retval;
	}
	if (fs->super->s_kbytes_written &&
	    fs->io->manager->get_stats)
		fs->io->manager->get_stats(fs->io, &stats);
	if (stats && stats->bytes_written && (fs->flags & EXT2_FLAG_RW)) {
		fs->super->s_kbytes_written += stats->bytes_written >> 10;
		meta_blks = fs->desc_blocks + 1;
		if (!(fs->flags & EXT2_FLAG_SUPER_ONLY))
			fs->super->s_kbytes_written += meta_blks /
				(fs->blocksize / 1024);
		if ((fs->flags & EXT2_FLAG_DIRTY) == 0)
			fs->flags |= EXT2_FLAG_SUPER_ONLY | EXT2_FLAG_DIRTY;
	}
Ejemplo n.º 2
0
errcode_t ext2fs_close(ext2_filsys fs)
{
    errcode_t	retval;

    EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);

    if (fs->flags & EXT2_FLAG_DIRTY) {
        retval = ext2fs_flush(fs);
        if (retval)
            return retval;
    }
    if (fs->write_bitmaps) {
        retval = fs->write_bitmaps(fs);
        if (retval)
            return retval;
    }
    ext2fs_free(fs);
    return 0;
}
Ejemplo n.º 3
0
errcode_t ext2fs_flush2(ext2_filsys fs, int flags)
{
	dgrp_t		i;
	errcode_t	retval;
	unsigned long	fs_state;
	__u32		feature_incompat;
	struct ext2_super_block *super_shadow = 0;
	struct ext2_group_desc *group_shadow = 0;
#ifdef WORDS_BIGENDIAN
	struct ext2_group_desc *gdp;
	dgrp_t		j;
#endif
	char	*group_ptr;
	blk64_t	old_desc_blocks;
	struct ext2fs_numeric_progress_struct progress;

	EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);

	fs_state = fs->super->s_state;
	feature_incompat = fs->super->s_feature_incompat;

	fs->super->s_wtime = fs->now ? fs->now : time(NULL);
	fs->super->s_block_group_nr = 0;

	/*
	 * If the write_bitmaps() function is present, call it to
	 * flush the bitmaps.  This is done this way so that a simple
	 * program that doesn't mess with the bitmaps doesn't need to
	 * drag in the bitmaps.c code.
	 *
	 * Bitmap checksums live in the group descriptor, so the
	 * bitmaps need to be written before the descriptors.
	 */
	if (fs->write_bitmaps) {
		retval = fs->write_bitmaps(fs);
		if (retval)
			goto errout;
	}

	/* Prepare the group descriptors for writing */
#ifdef WORDS_BIGENDIAN
	retval = EXT2_ET_NO_MEMORY;
	retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &super_shadow);
	if (retval)
		goto errout;
	retval = ext2fs_get_array(fs->desc_blocks, fs->blocksize,
				  &group_shadow);
	if (retval)
		goto errout;
	memcpy(super_shadow, fs->super, sizeof(struct ext2_super_block));
	memcpy(group_shadow, fs->group_desc, (size_t) fs->blocksize *
	       fs->desc_blocks);

	/* swap the group descriptors */
	for (j = 0; j < fs->group_desc_count; j++) {
		gdp = ext2fs_group_desc(fs, group_shadow, j);
		ext2fs_swap_group_desc2(fs, gdp);
	}
#else
	super_shadow = fs->super;
	group_shadow = ext2fs_group_desc(fs, fs->group_desc, 0);
#endif

	/*
	 * Set the state of the FS to be non-valid.  (The state has
	 * already been backed up earlier, and will be restored after
	 * we write out the backup superblocks.)
	 */
	fs->super->s_state &= ~EXT2_VALID_FS;
	ext2fs_clear_feature_journal_needs_recovery(fs->super);

	/*
	 * If this is an external journal device, don't write out the
	 * block group descriptors or any of the backup superblocks
	 */
	if (ext2fs_has_feature_journal_dev(fs->super))
		goto write_primary_superblock_only;

	/*
	 * Write out the master group descriptors, and the backup
	 * superblocks and group descriptors.
	 */
	group_ptr = (char *) group_shadow;
	if (ext2fs_has_feature_meta_bg(fs->super)) {
		old_desc_blocks = fs->super->s_first_meta_bg;
		if (old_desc_blocks > fs->desc_blocks)
			old_desc_blocks = fs->desc_blocks;
	} else
		old_desc_blocks = fs->desc_blocks;

	if (fs->progress_ops && fs->progress_ops->init)
		(fs->progress_ops->init)(fs, &progress, NULL,
					 fs->group_desc_count);


	for (i = 0; i < fs->group_desc_count; i++) {
		blk64_t	super_blk, old_desc_blk, new_desc_blk;

		if (fs->progress_ops && fs->progress_ops->update)
			(fs->progress_ops->update)(fs, &progress, i);
		ext2fs_super_and_bgd_loc2(fs, i, &super_blk, &old_desc_blk,
					 &new_desc_blk, 0);

		if (!(fs->flags & EXT2_FLAG_MASTER_SB_ONLY) &&i && super_blk) {
			retval = write_backup_super(fs, i, super_blk,
						    super_shadow);
			if (retval)
				goto errout;
		}
		if (fs->flags & EXT2_FLAG_SUPER_ONLY)
			continue;
		if ((old_desc_blk) &&
		    (!(fs->flags & EXT2_FLAG_MASTER_SB_ONLY) || (i == 0))) {
			retval = io_channel_write_blk64(fs->io,
			      old_desc_blk, old_desc_blocks, group_ptr);
			if (retval)
				goto errout;
		}
		if (new_desc_blk) {
			int meta_bg = i / EXT2_DESC_PER_BLOCK(fs->super);

			retval = io_channel_write_blk64(fs->io, new_desc_blk,
				1, group_ptr + (meta_bg*fs->blocksize));
			if (retval)
				goto errout;
		}
	}

	if (fs->progress_ops && fs->progress_ops->close)
		(fs->progress_ops->close)(fs, &progress, NULL);

write_primary_superblock_only:
	/*
	 * Write out master superblock.  This has to be done
	 * separately, since it is located at a fixed location
	 * (SUPERBLOCK_OFFSET).  We flush all other pending changes
	 * out to disk first, just to avoid a race condition with an
	 * insy-tinsy window....
	 */

	fs->super->s_block_group_nr = 0;
	fs->super->s_state = fs_state;
	fs->super->s_feature_incompat = feature_incompat;
#ifdef WORDS_BIGENDIAN
	*super_shadow = *fs->super;
	ext2fs_swap_super(super_shadow);
#endif

	retval = ext2fs_superblock_csum_set(fs, super_shadow);
	if (retval)
		return retval;

	if (!(flags & EXT2_FLAG_FLUSH_NO_SYNC))
		retval = io_channel_flush(fs->io);
	retval = write_primary_superblock(fs, super_shadow);
	if (retval)
		goto errout;

	fs->flags &= ~EXT2_FLAG_DIRTY;

	if (!(flags & EXT2_FLAG_FLUSH_NO_SYNC))
		retval = io_channel_flush(fs->io);
errout:
	fs->super->s_state = fs_state;
#ifdef WORDS_BIGENDIAN
	if (super_shadow)
		ext2fs_free_mem(&super_shadow);
	if (group_shadow)
		ext2fs_free_mem(&group_shadow);
#endif
	return retval;
}
Ejemplo n.º 4
0
errcode_t ext2fs_flush(ext2_filsys fs)
{
	dgrp_t		i;
	errcode_t	retval;
	unsigned long	fs_state;
	__u32		feature_incompat;
	struct ext2_super_block *super_shadow = 0;
	struct ext2_group_desc *group_shadow = 0;
#if defined(WORDS_BIGENDIAN) || (BYTE_ORDER == BIG_ENDIAN)
	struct ext2_group_desc *s, *t;
	dgrp_t		j;
#endif
	char	*group_ptr;
	int	old_desc_blocks;

	EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);

	fs_state = fs->super->s_state;
	feature_incompat = fs->super->s_feature_incompat;

	fs->super->s_wtime = fs->now ? fs->now : time(NULL);
	fs->super->s_block_group_nr = 0;
#if defined(WORDS_BIGENDIAN) || (BYTE_ORDER == BIG_ENDIAN)
	retval = EXT2_ET_NO_MEMORY;
	retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &super_shadow);
	if (retval)
		goto errout;
	retval = ext2fs_get_array(fs->desc_blocks, fs->blocksize,
				  &group_shadow);
	if (retval)
		goto errout;
	memset(group_shadow, 0, (size_t) fs->blocksize *
	       fs->desc_blocks);

	/* swap the group descriptors */
	for (j=0, s=fs->group_desc, t=group_shadow;
	     j < fs->group_desc_count; j++, t++, s++) {
		*t = *s;
		ext2fs_swap_group_desc(t);
	}
#else
	super_shadow = fs->super;
	group_shadow = fs->group_desc;
#endif

	/*
	 * Set the state of the FS to be non-valid.  (The state has
	 * already been backed up earlier, and will be restored after
	 * we write out the backup superblocks.)
	 */
	fs->super->s_state &= ~EXT2_VALID_FS;
	fs->super->s_feature_incompat &= ~EXT3_FEATURE_INCOMPAT_RECOVER;
#if defined(WORDS_BIGENDIAN) || (BYTE_ORDER == BIG_ENDIAN)
	*super_shadow = *fs->super;
	ext2fs_swap_super(super_shadow);
#endif

	/*
	 * If this is an external journal device, don't write out the
	 * block group descriptors or any of the backup superblocks
	 */
	if (fs->super->s_feature_incompat &
	    EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)
		goto write_primary_superblock_only;

	/*
	 * Write out the master group descriptors, and the backup
	 * superblocks and group descriptors.
	 */
	group_ptr = (char *) group_shadow;
	if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG)
		old_desc_blocks = fs->super->s_first_meta_bg;
	else
		old_desc_blocks = fs->desc_blocks;

	for (i = 0; i < fs->group_desc_count; i++) {
		blk_t	super_blk, old_desc_blk, new_desc_blk;
		int	meta_bg;

		ext2fs_super_and_bgd_loc(fs, i, &super_blk, &old_desc_blk,
					 &new_desc_blk, &meta_bg);

		if (!(fs->flags & EXT2_FLAG_MASTER_SB_ONLY) &&i && super_blk) {
			retval = write_backup_super(fs, i, super_blk,
						    super_shadow);
			if (retval)
				goto errout;
		}
		if (fs->flags & EXT2_FLAG_SUPER_ONLY)
			continue;
		if ((old_desc_blk) &&
		    (!(fs->flags & EXT2_FLAG_MASTER_SB_ONLY) || (i == 0))) {
			retval = io_channel_write_blk(fs->io,
			      old_desc_blk, old_desc_blocks, group_ptr);
			if (retval)
				goto errout;
		}
		if (new_desc_blk) {
			retval = io_channel_write_blk(fs->io, new_desc_blk,
				1, group_ptr + (meta_bg*fs->blocksize));
			if (retval)
				goto errout;
		}
	}

	/*
	 * If the write_bitmaps() function is present, call it to
	 * flush the bitmaps.  This is done this way so that a simple
	 * program that doesn't mess with the bitmaps doesn't need to
	 * drag in the bitmaps.c code.
	 */
	if (fs->write_bitmaps) {
		retval = fs->write_bitmaps(fs);
		if (retval)
			goto errout;
	}

write_primary_superblock_only:
	/*
	 * Write out master superblock.  This has to be done
	 * separately, since it is located at a fixed location
	 * (SUPERBLOCK_OFFSET).  We flush all other pending changes
	 * out to disk first, just to avoid a race condition with an
	 * insy-tinsy window....
	 */

	fs->super->s_block_group_nr = 0;
	fs->super->s_state = fs_state;
	fs->super->s_feature_incompat = feature_incompat;
#if defined(WORDS_BIGENDIAN) || (BYTE_ORDER == BIG_ENDIAN)
	*super_shadow = *fs->super;
	ext2fs_swap_super(super_shadow);
#endif

	retval = io_channel_flush(fs->io);
	retval = write_primary_superblock(fs, super_shadow);
	if (retval)
		goto errout;

	fs->flags &= ~EXT2_FLAG_DIRTY;

	retval = io_channel_flush(fs->io);
errout:
	fs->super->s_state = fs_state;
#if defined(WORDS_BIGENDIAN) || (BYTE_ORDER == BIG_ENDIAN)
	if (super_shadow)
		ext2fs_free_mem(&super_shadow);
	if (group_shadow)
		ext2fs_free_mem(&group_shadow);
#endif
	return retval;
}
Ejemplo n.º 5
0
errcode_t ext2fs_flush(ext2_filsys fs)
{
	dgrp_t		i;
	errcode_t	retval;
	unsigned long	fs_state;
	__u32		feature_incompat;
	struct ext2_super_block *super_shadow = 0;
	struct ext2_group_desc *group_shadow = 0;
#ifdef WORDS_BIGENDIAN
	struct ext2_group_desc *s, *t;
	dgrp_t		j;
#endif
	char	*group_ptr;
	int	old_desc_blocks;

	EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);

	fs_state = fs->super->s_state;
	feature_incompat = fs->super->s_feature_incompat;

	fs->super->s_wtime = fs->now ? fs->now : time(NULL);
	fs->super->s_block_group_nr = 0;
#ifdef WORDS_BIGENDIAN
	retval = EXT2_ET_NO_MEMORY;
	retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &super_shadow);
	if (retval)
		goto errout;
	retval = ext2fs_get_array(fs->desc_blocks, fs->blocksize,
				  &group_shadow);
	if (retval)
		goto errout;
	memset(group_shadow, 0, (size_t) fs->blocksize *
	       fs->desc_blocks);

	
	for (j=0, s=fs->group_desc, t=group_shadow;
	     j < fs->group_desc_count; j++, t++, s++) {
		*t = *s;
		ext2fs_swap_group_desc(t);
	}
#else
	super_shadow = fs->super;
	group_shadow = fs->group_desc;
#endif

	fs->super->s_state &= ~EXT2_VALID_FS;
	fs->super->s_feature_incompat &= ~EXT3_FEATURE_INCOMPAT_RECOVER;
#ifdef WORDS_BIGENDIAN
	*super_shadow = *fs->super;
	ext2fs_swap_super(super_shadow);
#endif

	if (fs->super->s_feature_incompat &
	    EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)
		goto write_primary_superblock_only;

	group_ptr = (char *) group_shadow;
	if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG)
		old_desc_blocks = fs->super->s_first_meta_bg;
	else
		old_desc_blocks = fs->desc_blocks;

	for (i = 0; i < fs->group_desc_count; i++) {
		blk_t	super_blk, old_desc_blk, new_desc_blk;
		int	meta_bg;

		ext2fs_super_and_bgd_loc(fs, i, &super_blk, &old_desc_blk,
					 &new_desc_blk, &meta_bg);

		if (!(fs->flags & EXT2_FLAG_MASTER_SB_ONLY) &&i && super_blk) {
			retval = write_backup_super(fs, i, super_blk,
						    super_shadow);
			if (retval)
				goto errout;
		}
		if (fs->flags & EXT2_FLAG_SUPER_ONLY)
			continue;
		if ((old_desc_blk) &&
		    (!(fs->flags & EXT2_FLAG_MASTER_SB_ONLY) || (i == 0))) {
			retval = io_channel_write_blk(fs->io,
			      old_desc_blk, old_desc_blocks, group_ptr);
			if (retval)
				goto errout;
		}
		if (new_desc_blk) {
			retval = io_channel_write_blk(fs->io, new_desc_blk,
				1, group_ptr + (meta_bg*fs->blocksize));
			if (retval)
				goto errout;
		}
	}

	if (fs->write_bitmaps) {
		retval = fs->write_bitmaps(fs);
		if (retval)
			goto errout;
	}

write_primary_superblock_only:

	fs->super->s_block_group_nr = 0;
	fs->super->s_state = fs_state;
	fs->super->s_feature_incompat = feature_incompat;
#ifdef WORDS_BIGENDIAN
	*super_shadow = *fs->super;
	ext2fs_swap_super(super_shadow);
#endif

	retval = io_channel_flush(fs->io);
	retval = write_primary_superblock(fs, super_shadow);
	if (retval)
		goto errout;

	fs->flags &= ~EXT2_FLAG_DIRTY;

	retval = io_channel_flush(fs->io);
errout:
	fs->super->s_state = fs_state;
#ifdef WORDS_BIGENDIAN
	if (super_shadow)
		ext2fs_free_mem(&super_shadow);
	if (group_shadow)
		ext2fs_free_mem(&group_shadow);
#endif
	return retval;
}