Fix ea remapping

check blocks to move even when shrinking inode tables (fixes big flex_bg shrink),
mark inode tables during allocation (fixes bigalloc shrink)

.gitignore

@@ -161,6 +161,8 @@ misc/e2initrd_helper
 misc/e2label.8
 misc/e2undo
 misc/e2undo.8
+misc/e2patch
+misc/e2patch.8
 misc/e4defrag
 misc/e4defrag.8
 misc/ext4.5

acinclude.m4

@@ -108,7 +108,7 @@ AC_DEFUN(
         [CHECK_GNU_MAKE], [ AC_CACHE_CHECK( for GNU make,_cv_gnu_make_command,
                 _cv_gnu_make_command='' ;
 dnl Search all the common names for GNU make
-                if test -z "$FORCE_NATIVE_MAKE" ; then
+                if test -n "$FORCE_NATIVE_MAKE" ; then
                    MAKES="make"
                 else
                    MAKES="make gmake gnumake"

configure

@@ -11515,7 +11515,7 @@ if ${_cv_gnu_make_command+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   _cv_gnu_make_command='' ;
-                if test -z "$FORCE_NATIVE_MAKE" ; then
+                if test -n "$FORCE_NATIVE_MAKE" ; then
                    MAKES="make"
                 else
                    MAKES="make gmake gnumake"

e2fsck/e2fsck.8.in

@@ -345,6 +345,12 @@ or
 .B \-p
 options.
 .TP
+.BI \-T " patch_file"
+Do not apply changes to the real filesystem; write updates into a sparse file
+named 'patch_file' to safely apply them later with e2patch(8) utility.
+You'll also be able to create a backup before applying patch and safely
+restore it in case of power outage or system crash.
+.TP
 .BI \-z " undo_file"
 Before overwriting a file system block, write the old contents of the block to
 an undo file.  This undo file can be used with e2undo(8) to restore the old

e2fsck/e2fsck.h

@@ -391,6 +391,9 @@ struct e2fsck_struct {
 	 */
 	ext2fs_inode_bitmap inodes_to_rebuild;
 
+	/* Patch file */
+	char *patch_file;
+
 	/* Undo file */
 	char *undo_file;
 };

e2fsck/unix.c

@@ -76,7 +76,7 @@ static void usage(e2fsck_t ctx)
 	fprintf(stderr,
 		_("Usage: %s [-panyrcdfktvDFV] [-b superblock] [-B blocksize]\n"
 		"\t\t[-l|-L bad_blocks_file] [-C fd] [-j external_journal]\n"
-		"\t\t[-E extended-options] [-z undo_file] device\n"),
+		"\t\t[-E extended-options] [-T patch_file] [-z undo_file] device\n"),
 		ctx->program_name);
 
 	fprintf(stderr, "%s", _("\nEmergency help:\n"
@@ -92,6 +92,7 @@ static void usage(e2fsck_t ctx)
 		" -j external_journal  Set location of the external journal\n"
 		" -l bad_blocks_file   Add to badblocks list\n"
 		" -L bad_blocks_file   Set badblocks list\n"
+		" -T patch_file        Create a patch file instead of applying changes to real FS\n"
 		" -z undo_file         Create an undo file\n"
 		));
 
@@ -804,7 +805,7 @@ static errcode_t PRS(int argc, char *argv[], e2fsck_t *ret_ctx)
 
 	phys_mem_kb = get_memory_size() / 1024;
 	ctx->readahead_kb = ~0ULL;
-	while ((c = getopt(argc, argv, "panyrcC:B:dE:fvtFVM:b:I:j:P:l:L:N:SsDkz:")) != EOF)
+	while ((c = getopt(argc, argv, "panyrcC:B:dE:fvtFVM:b:I:j:P:l:L:N:SsDkT:z:")) != EOF)
 		switch (c) {
 		case 'C':
 			ctx->progress = e2fsck_update_progress;
@@ -936,6 +937,9 @@ static errcode_t PRS(int argc, char *argv[], e2fsck_t *ret_ctx)
 		case 'k':
 			keep_bad_blocks++;
 			break;
+		case 'T':
+			ctx->patch_file = optarg;
+			break;
 		case 'z':
 			ctx->undo_file = optarg;
 			break;
@@ -1233,6 +1237,19 @@ check_error:
 	return retval;
 }
 
+static int e2fsck_setup_patch(e2fsck_t ctx, io_manager *io_ptr)
+{
+	set_patch_io_backing_manager(*io_ptr);
+	set_patch_io_patch_file(ctx->patch_file);
+	*io_ptr = patch_io_manager;
+	printf(_("To make backup before applying changes run:\n"
+		"  e2patch backup %s %s %s.backup\n"
+		"Then, to apply the operation to the real filesystem run:\n"
+		"  e2patch apply %s %s\n"),
+		ctx->device_name, ctx->patch_file, ctx->patch_file, ctx->device_name, ctx->patch_file);
+	return 0;
+}
+
 static int e2fsck_setup_tdb(e2fsck_t ctx, io_manager *io_ptr)
 {
 	errcode_t retval = ENOMEM;
@@ -1430,7 +1447,11 @@ restart:
 			flags &= ~EXT2_FLAG_EXCLUSIVE;
 	}
 
-	if (ctx->undo_file) {
+	if (ctx->patch_file) {
+		retval = e2fsck_setup_patch(ctx, &io_ptr);
+		if (retval)
+			exit(FSCK_ERROR);
+	} else if (ctx->undo_file) {
 		retval = e2fsck_setup_tdb(ctx, &io_ptr);
 		if (retval)
 			exit(FSCK_ERROR);

e2fsprogs.spec.in

@@ -117,6 +117,7 @@ exit 0
 %{_root_sbindir}/e2image
 %{_root_sbindir}/e2label
 %{_root_sbindir}/e2undo
+%{_root_sbindir}/e2patch
 %{_root_sbindir}/findfs
 %{_root_sbindir}/fsck
 %{_root_sbindir}/fsck.ext2
@@ -168,6 +169,7 @@ exit 0
 %{_mandir}/man8/e2image.8*
 %{_mandir}/man8/e2label.8*
 %{_mandir}/man8/e2undo.8*
+%{_mandir}/man8/e2patch.8*
 %{_mandir}/man8/fsck.8*
 %{_mandir}/man8/logsave.8*
 %{_mandir}/man8/mke2fs.8*

lib/ext2fs/Android.mk

@@ -75,6 +75,8 @@ libext2fs_src_files := \
 	swapfs.c \
 	symlink.c \
 	undo_io.c \
+	patch.c \
+	patch_io.c \
 	unix_io.c \
 	unlink.c \
 	valid_blk.c \

lib/ext2fs/Makefile.in

@@ -124,6 +124,8 @@ OBJS= $(DEBUGFS_LIB_OBJS) $(RESIZE_LIB_OBJS) $(E2IMAGE_LIB_OBJS) \
 	symlink.o \
 	$(TDB_OBJ) \
 	undo_io.o \
+	patch.o \
+	patch_io.o \
 	unix_io.o \
 	unlink.o \
 	valid_blk.o \
@@ -211,6 +213,8 @@ SRCS= ext2_err.c \
 	$(srcdir)/tst_getsize.c \
 	$(srcdir)/tst_iscan.c \
 	$(srcdir)/undo_io.c \
+	$(srcdir)/patch.c \
+	$(srcdir)/patch_io.c \
 	$(srcdir)/unix_io.c \
 	$(srcdir)/unlink.c \
 	$(srcdir)/valid_blk.c \
@@ -1099,6 +1103,18 @@ undo_io.o: $(srcdir)/undo_io.c $(top_builddir)/lib/config.h \
  $(srcdir)/ext2_fs.h $(srcdir)/ext3_extents.h $(top_srcdir)/lib/et/com_err.h \
  $(srcdir)/ext2_io.h $(top_builddir)/lib/ext2fs/ext2_err.h \
  $(srcdir)/ext2_ext_attr.h $(srcdir)/bitops.h $(srcdir)/ext2fsP.h
+patch.o: $(srcdir)/patch.c $(top_builddir)/lib/config.h \
+ $(top_builddir)/lib/dirpaths.h $(srcdir)/ext2_fs.h \
+ $(top_builddir)/lib/ext2fs/ext2_types.h $(srcdir)/ext2fs.h \
+ $(srcdir)/ext2_fs.h $(srcdir)/ext3_extents.h $(top_srcdir)/lib/et/com_err.h \
+ $(srcdir)/ext2_io.h $(top_builddir)/lib/ext2fs/ext2_err.h \
+ $(srcdir)/ext2_ext_attr.h $(srcdir)/bitops.h $(srcdir)/ext2fsP.h
+patch_io.o: $(srcdir)/patch_io.c $(top_builddir)/lib/config.h \
+ $(top_builddir)/lib/dirpaths.h $(srcdir)/ext2_fs.h \
+ $(top_builddir)/lib/ext2fs/ext2_types.h $(srcdir)/ext2fs.h \
+ $(srcdir)/ext2_fs.h $(srcdir)/ext3_extents.h $(top_srcdir)/lib/et/com_err.h \
+ $(srcdir)/ext2_io.h $(top_builddir)/lib/ext2fs/ext2_err.h \
+ $(srcdir)/ext2_ext_attr.h $(srcdir)/bitops.h $(srcdir)/ext2fsP.h
 unix_io.o: $(srcdir)/unix_io.c $(top_builddir)/lib/config.h \
  $(top_builddir)/lib/dirpaths.h $(srcdir)/ext2_fs.h \
  $(top_builddir)/lib/ext2fs/ext2_types.h $(srcdir)/ext2fs.h \

lib/ext2fs/ext2_io.h

@@ -145,6 +145,11 @@ extern io_manager undo_io_manager;
 extern errcode_t set_undo_io_backing_manager(io_manager manager);
 extern errcode_t set_undo_io_backup_file(char *file_name);
 
+/* patch_io.c */
+extern io_manager patch_io_manager;
+extern errcode_t set_patch_io_backing_manager(io_manager manager);
+extern errcode_t set_patch_io_patch_file(char *file_name);
+
 /* test_io.c */
 extern io_manager test_io_manager, test_io_backing_manager;
 extern void (*test_io_cb_read_blk)

lib/ext2fs/patch.c

@@ -0,0 +1,228 @@
+/**
+ * patch.c --- Common "patch" file functions
+ *
+ * Copyright (c) Vitaliy Filippov <vitalif@mail.ru> 2014
+ * License: GNU GPLv2 or later
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#define _LARGEFILE_SOURCE
+#define _LARGEFILE64_SOURCE
+
+#include <unistd.h>
+#include <fcntl.h>
+#include "patch.h"
+
+errcode_t ext2fs_patch_retry_read(int fd, ssize_t size, void *buf)
+{
+	ssize_t r, done = 0;
+	while (done < size)
+	{
+		r = read(fd, buf+done, size-done);
+		if (!r || (r < 0 && errno != EAGAIN))
+			break;
+		done += r;
+	}
+	if (done < size)
+		return errno;
+	return 0;
+}
+
+errcode_t ext2fs_patch_retry_write(int fd, ssize_t size, const void *buf)
+{
+	ssize_t r, done = 0;
+	while (done < size)
+	{
+		r = write(fd, buf+done, size-done);
+		if (r <= 0 && errno != EAGAIN)
+			break;
+		done += r;
+	}
+	if (done < size)
+		return errno;
+	return 0;
+}
+
+errcode_t ext2fs_patch_retry_read_at(int fd, unsigned long long offset, ssize_t size, void *buf)
+{
+	if ((unsigned long long)ext2fs_llseek(fd, offset, SEEK_SET) != offset)
+		return errno ? errno : EXT2_ET_LLSEEK_FAILED;
+	return ext2fs_patch_retry_read(fd, size, buf);
+}
+
+errcode_t ext2fs_patch_retry_write_at(int fd, unsigned long long offset, ssize_t size, const void *buf)
+{
+	if ((unsigned long long)ext2fs_llseek(fd, offset, SEEK_SET) != offset)
+		return errno ? errno : EXT2_ET_LLSEEK_FAILED;
+	return ext2fs_patch_retry_write(fd, size, buf);
+}
+
+errcode_t ext2fs_patch_read_bmap(struct ext2fs_patch_file *data)
+{
+	errcode_t retval = 0;
+	int bufsize = 65536;
+	blk64_t i, r;
+	void *buf = malloc(bufsize);
+	if (!buf)
+		return ENOMEM;
+	ext2fs_llseek(data->patch_fd, data->block_size, SEEK_SET);
+	for (i = 0; i < data->size/8; )
+	{
+		r = bufsize;
+		if (data->size/8 - i < r)
+			r = data->size/8 - i;
+		retval = ext2fs_patch_retry_read(data->patch_fd, r, buf);
+		if (retval)
+			goto out;
+		ext2fs_set_generic_bmap_range(data->bmap, i*8, r*8, buf);
+		i += r;
+	}
+out:
+	free(buf);
+	return retval;
+}
+
+errcode_t ext2fs_patch_write_bmap(struct ext2fs_patch_file *data)
+{
+	errcode_t retval = 0;
+	int bufsize = 65536;
+	blk64_t i, r;
+	struct patchbd_super s;
+	void *buf = malloc(bufsize);
+	if (!buf)
+		return ENOMEM;
+	ext2fs_llseek(data->patch_fd, data->block_size, SEEK_SET);
+	for (i = 0; i < data->size/8; )
+	{
+		r = bufsize;
+		if (data->size/8 - i < r)
+			r = data->size/8 - i;
+		ext2fs_get_generic_bmap_range(data->bmap, i*8, r*8, buf);
+		retval = ext2fs_patch_retry_write(data->patch_fd, r, buf);
+		if (retval)
+			goto out;
+		i += r;
+	}
+	ext2fs_llseek(data->patch_fd, 0, SEEK_SET);
+	s.magic = PATCHBD_MAGIC;
+	s.patch_block = data->block_size;
+	s.patch_size = data->size;
+	write(data->patch_fd, &s, sizeof(struct patchbd_super));
+out:
+	free(buf);
+	return 0;
+}
+
+errcode_t ext2fs_patch_open(struct ext2fs_patch_file *data, char *patch_file, int flags)
+{
+	errcode_t retval = 0;
+	ext2_loff_t size;
+	struct patchbd_super s;
+	data->block_size = 0;
+	data->size = 0;
+	data->offset = 0;
+	data->bmap = NULL;
+	data->patch_file = strdup(patch_file);
+	data->patch_fd = open(data->patch_file, flags|O_RDWR, 0666);
+	if (data->patch_fd < 0)
+		return errno;
+	size = ext2fs_llseek(data->patch_fd, 0, SEEK_END);
+	if (size < 0)
+		return errno;
+	if (size > 0)
+	{
+		size = ext2fs_llseek(data->patch_fd, 0, SEEK_SET);
+		read(data->patch_fd, &s, sizeof(struct patchbd_super));
+		if (s.magic != PATCHBD_MAGIC)
+			return 0;
+		data->block_size = s.patch_block;
+//		if (data->block_size != 4096)
+//			return EINVAL;
+		data->size = s.patch_size;
+		retval = ext2fs_patch_init_bmap(data, NULL);
+		if (retval)
+			return retval;
+		retval = ext2fs_patch_read_bmap(data);
+	}
+	return 0;
+}
+
+errcode_t ext2fs_patch_close(struct ext2fs_patch_file *data)
+{
+	if (data)
+	{
+		if (data->bmap)
+		{
+			if (data->patch_fd >= 0)
+				ext2fs_patch_write_bmap(data);
+			ext2fs_free_generic_bmap(data->bmap);
+			data->bmap = NULL;
+		}
+		if (data->patch_fd >= 0)
+		{
+			close(data->patch_fd);
+			data->patch_fd = -1;
+		}
+		if (data->patch_file)
+		{
+			free(data->patch_file);
+			data->patch_file = NULL;
+		}
+	}
+	return 0;
+}
+
+errcode_t ext2fs_patch_init_bmap(struct ext2fs_patch_file *data, io_channel channel)
+{
+	errcode_t retval = 0;
+	if (!data->bmap)
+	{
+		if (channel)
+		{
+			// channel is optional parameter, if passed, means 'take size from channel'
+			data->block_size = channel->block_size;
+//			if (data->block_size != 4096)
+//				return EINVAL;
+			retval = ext2fs_get_device_size2(channel->name, data->block_size, &data->size);
+			if (retval)
+				return retval;
+		}
+		else if (!data->block_size || !data->size)
+			return EINVAL;
+		retval = ext2fs_make_generic_bitmap(EXT2_ET_MAGIC_BLOCK_BITMAP, NULL,
+			0, data->size, data->size, "overwritten blocks", 0, &data->bmap);
+		data->offset = data->block_size + ((((data->size+7)>>3)+(data->block_size-1))&~(data->block_size-1));
+	}
+	return retval;
+}
+
+errcode_t ext2fs_patch_write_blk64(struct ext2fs_patch_file *data, unsigned long long block, int count, const void *buf)
+{
+	ssize_t size;
+	if (!data->bmap)
+		return EINVAL;
+	if (count < 0)
+	{
+		if ((unsigned)-count > data->block_size)
+			return EINVAL;
+		size = -count;
+		count = 1;
+	}
+	else
+		size = count*data->block_size;
+	ext2fs_mark_block_bitmap_range2(data->bmap, block, count);
+	return ext2fs_patch_retry_write_at(data->patch_fd, data->offset + block*data->block_size, size, buf);
+}

lib/ext2fs/patch.h

@@ -0,0 +1,64 @@
+/**
+ * patch.h --- Common "patch" file functions
+ *
+ * Patch file format:
+ * 1) sparse data blocks - same size as the patched filesystem, but only changed blocks are written
+ * 2) updated block bitmap - fs_size/block_size/8 bytes
+ * 3) 4 byte FS block size
+ * 4) 8 byte FS size in blocks
+ *
+ * Copyright (c) Vitaliy Filippov <vitalif@mail.ru> 2014
+ * License: GNU GPLv2 or later
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef E2_PATCH_H
+#define E2_PATCH_H
+
+#include "ext2_fs.h"
+#include "ext2fs.h"
+
+#define PATCHBD_MAGIC 0x44623950 // P9bD
+
+struct ext2fs_patch_file
+{
+	char *patch_file;
+	int patch_fd;
+	__u32 block_size;
+	blk64_t size;
+	ext2_loff_t offset;
+	ext2fs_generic_bitmap bmap;
+};
+
+struct patchbd_super
+{
+	__u32 magic;
+	__u32 patch_block;
+	__u64 patch_size;
+};
+
+errcode_t ext2fs_patch_retry_read(int fd, ssize_t size, void *buf);
+errcode_t ext2fs_patch_retry_write(int fd, ssize_t size, const void *buf);
+errcode_t ext2fs_patch_retry_read_at(int fd, unsigned long long offset, ssize_t size, void *buf);
+errcode_t ext2fs_patch_retry_write_at(int fd, unsigned long long offset, ssize_t size, const void *buf);
+errcode_t ext2fs_patch_read_bmap(struct ext2fs_patch_file *data);
+errcode_t ext2fs_patch_write_bmap(struct ext2fs_patch_file *data);
+errcode_t ext2fs_patch_open(struct ext2fs_patch_file *data, char *patch_file, int flags);
+errcode_t ext2fs_patch_close(struct ext2fs_patch_file *data);
+errcode_t ext2fs_patch_init_bmap(struct ext2fs_patch_file *data, io_channel channel);
+errcode_t ext2fs_patch_write_blk64(struct ext2fs_patch_file *data, unsigned long long block, int count, const void *buf);
+
+#endif

lib/ext2fs/patch_io.c

@@ -0,0 +1,375 @@
+/*
+ * patch_io.c --- This is the "patch" io manager that writes the new data into
+ * a separate sparse file to apply it later.
+ *
+ * Copyright (c) Vitaliy Filippov <vitalif@mail.ru> 2014
+ * License: GNU GPLv2 or later
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#define _LARGEFILE_SOURCE
+#define _LARGEFILE64_SOURCE
+
+#include <stdio.h>
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+
+#include "ext2_fs.h"
+#include "ext2fs.h"
+
+#include "patch.h"
+
+#ifdef __GNUC__
+#define ATTR(x) __attribute__(x)
+#else
+#define ATTR(x)
+#endif
+
+#define EXT2_CHECK_MAGIC(struct, code) if ((struct)->magic != (code)) return (code)
+
+struct patch_private_data
+{
+	int magic;
+	struct ext2fs_patch_file patch;
+	/* The backing io channel */
+	io_channel real;
+	/* to support offset in unix I/O manager */
+	ext2_loff_t offset;
+};
+
+static errcode_t patch_open(const char *name, int flags, io_channel *channel);
+static errcode_t patch_close(io_channel channel);
+static errcode_t patch_set_blksize(io_channel channel, int blksize);
+static errcode_t patch_read_blk64(io_channel channel, unsigned long long block, int count, void *data);
+static errcode_t patch_write_blk64(io_channel channel, unsigned long long block, int count, const void *data);
+static errcode_t patch_read_blk(io_channel channel, unsigned long block, int count, void *data);
+static errcode_t patch_write_blk(io_channel channel, unsigned long block, int count, const void *data);
+static errcode_t patch_flush(io_channel channel);
+static errcode_t patch_write_byte(io_channel channel, unsigned long offset, int size, const void *data);
+static errcode_t patch_set_option(io_channel channel, const char *option, const char *arg);
+static errcode_t patch_get_stats(io_channel channel, io_stats *stats);
+
+static struct struct_io_manager struct_patch_manager = {
+	EXT2_ET_MAGIC_IO_MANAGER,
+	"Patch I/O Manager",
+	patch_open,
+	patch_close,
+	patch_set_blksize,
+	patch_read_blk,
+	patch_write_blk,
+	patch_flush,
+	patch_write_byte,
+	patch_set_option,
+	patch_get_stats,
+	patch_read_blk64,
+	patch_write_blk64,
+};
+
+io_manager patch_io_manager = &struct_patch_manager;
+static char *patch_file;
+static io_manager patch_io_backing_manager;
+
+errcode_t set_patch_io_backing_manager(io_manager manager)
+{
+	patch_io_backing_manager = manager;
+	return 0;
+}
+
+errcode_t set_patch_io_patch_file(char *file)
+{
+	patch_file = file;
+	return 0;
+}
+
+static errcode_t patch_open(const char *name, int flags, io_channel *channel)
+{
+	io_channel io = NULL;
+	struct patch_private_data *data = NULL;
+	errcode_t retval;
+
+	if (name == 0)
+		return EXT2_ET_BAD_DEVICE_NAME;
+	retval = ext2fs_get_mem(sizeof(struct struct_io_channel), &io);
+	if (retval)
+		goto cleanup;
+	memset(io, 0, sizeof(struct struct_io_channel));
+	io->magic = EXT2_ET_MAGIC_IO_CHANNEL;
+	retval = ext2fs_get_mem(sizeof(struct patch_private_data), &data);
+	if (retval)
+		goto cleanup;
+
+	io->manager = patch_io_manager;
+	retval = ext2fs_get_mem(strlen(name)+1, &io->name);
+	if (retval)
+		goto cleanup;
+
+	strcpy(io->name, name);
+	io->private_data = data;
+	io->block_size = 1024;
+	io->read_error = 0;
+	io->write_error = 0;
+	io->refcount = 1;
+
+	memset(data, 0, sizeof(struct patch_private_data));
+	data->magic = EXT2_ET_MAGIC_UNIX_IO_CHANNEL;
+
+	if (patch_io_backing_manager)
+	{
+		retval = patch_io_backing_manager->open(name, flags & ~IO_FLAG_RW, &data->real);
+		if (retval)
+			goto cleanup;
+	}
+
+	if (patch_file)
+	{
+		retval = ext2fs_patch_open(&data->patch, patch_file, O_CREAT);
+		if (retval)
+			goto cleanup;
+		if (data->patch.block_size)
+		{
+			retval = io_channel_set_blksize(data->real, data->patch.block_size);
+			if (retval)
+				goto cleanup;
+		}
+	}
+
+	*channel = io;
+	return 0;
+
+cleanup:
+	if (data)
+	{
+		ext2fs_patch_close(&data->patch);
+		if (data->real)
+			io_channel_close(data->real);
+		ext2fs_free_mem(&data);
+	}
+	if (io)
+	{
+		if (io->name)
+			ext2fs_free_mem(&io->name);
+		ext2fs_free_mem(&io);
+	}
+	return retval;
+}
+
+static errcode_t patch_close(io_channel channel)
+{
+	struct patch_private_data *data;
+	errcode_t retval = 0;
+
+	EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
+	data = (struct patch_private_data *) channel->private_data;
+	EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_UNIX_IO_CHANNEL);
+
+	if (--channel->refcount > 0)
+		return 0;
+
+	ext2fs_patch_close(&data->patch);
+	if (data->real)
+		retval = io_channel_close(data->real);
+	ext2fs_free_mem(&channel->private_data);
+	if (channel->name)
+		ext2fs_free_mem(&channel->name);
+	ext2fs_free_mem(&channel);
+
+	return retval;
+}
+
+static errcode_t patch_set_blksize(io_channel channel, int blksize)
+{
+	struct patch_private_data *data;
+	errcode_t retval = 0;
+
+	EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
+	data = (struct patch_private_data *) channel->private_data;
+	EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_UNIX_IO_CHANNEL);
+
+	channel->block_size = (unsigned)blksize;
+	if (data->patch.block_size && data->patch.block_size != (unsigned)blksize)
+		return EINVAL;
+	if (data->real)
+		retval = io_channel_set_blksize(data->real, blksize);
+	return retval;
+}
+
+static errcode_t patch_read_blk64(io_channel channel, unsigned long long block, int count, void *buf)
+{
+	errcode_t retval = 0;
+	struct patch_private_data *data;
+	int b, n;
+
+	EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
+	data = (struct patch_private_data *) channel->private_data;
+	EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_UNIX_IO_CHANNEL);
+
+	if (count < 0)
+	{
+		if (-count <= channel->block_size)
+		{
+			if (data->patch.bmap && ext2fs_test_generic_bitmap(data->patch.bmap, block))
+				retval = ext2fs_patch_retry_read_at(data->patch.patch_fd, data->patch.offset + block*channel->block_size, -count, buf);
+			else
+				retval = io_channel_read_blk64(data->real, block, count, buf);
+			return retval;
+		}
+		else
+			return EINVAL;
+	}
+	for (b = 0; b < count; )
+	{
+		for (n = 0; (b+n < count) && data->patch.bmap && ext2fs_test_generic_bitmap(data->patch.bmap, block+b+n); n++) {}
+		if (n > 0)
+		{
+			retval = ext2fs_patch_retry_read_at(data->patch.patch_fd, data->patch.offset + (block+b)*channel->block_size, n*channel->block_size, buf+b*channel->block_size);
+			if (retval)
+				break;
+			b += n;
+		}
+		for (n = 0; (b+n < count) && (!data->patch.bmap || !ext2fs_test_generic_bitmap(data->patch.bmap, block+b+n)); n++) {}
+		if (n > 0)
+		{
+			retval = io_channel_read_blk64(data->real, block+b, n, buf+b*channel->block_size);
+			if (retval)
+				break;
+			b += n;
+		}
+	}
+
+	return retval;
+}
+
+static errcode_t patch_read_blk(io_channel channel, unsigned long block, int count, void *buf)
+{
+	return patch_read_blk64(channel, block, count, buf);
+}
+
+static errcode_t patch_write_blk64(io_channel channel, unsigned long long block, int count, const void *buf)
+{
+	struct patch_private_data *data;
+	errcode_t retval = 0;
+
+	EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
+	data = (struct patch_private_data *) channel->private_data;
+	EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_UNIX_IO_CHANNEL);
+
+	retval = ext2fs_patch_init_bmap(&data->patch, channel);
+	if (retval)
+		return retval;
+	// libext2fs changes block size to 1024 in order to write the superblock, so we must support it...
+	if ((__u32)channel->block_size < data->patch.block_size)
+	{
+		void *buf2 = NULL;
+		unsigned long long block_real = block / (data->patch.block_size / channel->block_size);
+		int count_real = ( (block % (data->patch.block_size / channel->block_size))
+			+ (count > 0 ? count*channel->block_size : -count)
+			+ data->patch.block_size - 1 ) / data->patch.block_size;
+		retval = ext2fs_get_mem(count_real * data->patch.block_size, &buf2);
+		if (retval)
+			goto out;
+		retval = patch_read_blk64(channel, block_real, count_real, buf2);
+		if (retval)
+			goto out;
+		memcpy(buf2 + (block % (data->patch.block_size / channel->block_size)) * channel->block_size,
+			buf, (count > 0 ? count*channel->block_size : -count));
+		retval = ext2fs_patch_write_blk64(&data->patch, block_real, count_real, buf2);
+out:
+		if (buf2)
+			ext2fs_free_mem(&buf2);
+		return retval;
+	}
+	else if ((__u32)channel->block_size > data->patch.block_size)
+	{
+		return EXT2_ET_UNIMPLEMENTED;
+	}
+	return ext2fs_patch_write_blk64(&data->patch, block, count, buf);
+}
+
+static errcode_t patch_write_blk(io_channel channel, unsigned long block, int count, const void *buf)
+{
+	return patch_write_blk64(channel, block, count, buf);
+}
+
+static errcode_t patch_write_byte(io_channel channel, unsigned long offset, int size, const void *buf)
+{
+	return EXT2_ET_UNIMPLEMENTED;
+}
+
+/*
+ * Flush data buffers to disk.
+ */
+static errcode_t patch_flush(io_channel channel)
+{
+	errcode_t retval = 0;
+	struct patch_private_data *data;
+
+	EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
+	data = (struct patch_private_data *) channel->private_data;
+	EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_UNIX_IO_CHANNEL);
+
+	if (data->real)
+		retval = io_channel_flush(data->real);
+	if (data->patch.patch_fd)
+		fsync(data->patch.patch_fd);
+
+	return retval;
+}
+
+static errcode_t patch_set_option(io_channel channel, const char *option, const char *arg)
+{
+	errcode_t retval = 0;
+	struct patch_private_data *data;
+	unsigned long tmp;
+	char *end;
+
+	EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
+	data = (struct patch_private_data *) channel->private_data;
+	EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_UNIX_IO_CHANNEL);
+
+	/*
+	 * Need to support offset option to work with
+	 * Unix I/O manager
+	 */
+	if (data->real && data->real->manager->set_option)
+		retval = data->real->manager->set_option(data->real, option, arg);
+	if (!retval && !strcmp(option, "offset"))
+	{
+		if (!arg)
+			return EXT2_ET_INVALID_ARGUMENT;
+
+		tmp = strtoul(arg, &end, 0);
+		if (*end)
+			return EXT2_ET_INVALID_ARGUMENT;
+		data->offset = tmp;
+	}
+	return retval;
+}
+
+static errcode_t patch_get_stats(io_channel channel, io_stats *stats)
+{
+	errcode_t retval = 0;
+	struct patch_private_data *data;
+
+	EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
+	data = (struct patch_private_data *) channel->private_data;
+	EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_UNIX_IO_CHANNEL);
+
+	if (data->real)
+		retval = (data->real->manager->get_stats)(data->real, stats);
+
+	return retval;
+}

lib/ext2fs/unix_io.c

@@ -300,6 +300,7 @@ static errcode_t raw_write_blk(io_channel channel,
 			goto short_write;
 		size -= actual;
 		buf += actual;
+		location += actual;
 	}
 	return 0;
 

misc/Makefile.in

@@ -33,12 +33,12 @@ INSTALL = @INSTALL@
 @FUSE_CMT@FUSE_PROG= fuse2fs
 
 SPROGS=		mke2fs badblocks tune2fs dumpe2fs $(BLKID_PROG) logsave \
-			$(E2IMAGE_PROG) @FSCK_PROG@ e2undo
+			$(E2IMAGE_PROG) @FSCK_PROG@ e2undo e2patch
 USPROGS=	mklost+found filefrag e2freefrag $(UUIDD_PROG) \
 			$(E4DEFRAG_PROG) $(E4CRYPT_PROG) $(FUSE_PROG)
 SMANPAGES=	tune2fs.8 mklost+found.8 mke2fs.8 dumpe2fs.8 badblocks.8 \
 			e2label.8 $(FINDFS_MAN) $(BLKID_MAN) $(E2IMAGE_MAN) \
-			logsave.8 filefrag.8 e2freefrag.8 e2undo.8 \
+			logsave.8 filefrag.8 e2freefrag.8 e2undo.8 e2patch.8 \
 			$(UUIDD_MAN) $(E4DEFRAG_MAN) $(E4CRYPT_MAN) @FSCK_MAN@
 FMANPAGES=	mke2fs.conf.5 ext4.5
 
@@ -63,6 +63,7 @@ FSCK_OBJS=	fsck.o base_device.o ismounted.o
 BLKID_OBJS=	blkid.o
 FILEFRAG_OBJS=	filefrag.o
 E2UNDO_OBJS=  e2undo.o
+E2PATCH_OBJS=	e2patch.o
 E4DEFRAG_OBJS=	e4defrag.o
 E4CRYPT_OBJS=   e4crypt.o
 E2FREEFRAG_OBJS= e2freefrag.o
@@ -88,6 +89,7 @@ PROFILED_BLKID_OBJS=	profiled/blkid.o
 PROFILED_FILEFRAG_OBJS=	profiled/filefrag.o
 PROFILED_E2FREEFRAG_OBJS= profiled/e2freefrag.o
 PROFILED_E2UNDO_OBJS=	profiled/e2undo.o
+PROFILED_E2PATCH_OBJS=	profiled/e2patch.o
 PROFILED_E4DEFRAG_OBJS=	profiled/e4defrag.o
 PROFILED_E4CRYPT_OBJS=	profiled/e4crypt.o
 PROFILED_FUSE2FS_OJBS=	profiled/fuse2fs.o profiled/journal.o \
@@ -98,7 +100,7 @@ SRCS=	$(srcdir)/tune2fs.c $(srcdir)/mklost+found.c $(srcdir)/mke2fs.c $(srcdir)/
 		$(srcdir)/badblocks.c $(srcdir)/fsck.c $(srcdir)/util.c \
 		$(srcdir)/uuidgen.c $(srcdir)/blkid.c $(srcdir)/logsave.c \
 		$(srcdir)/filefrag.c $(srcdir)/base_device.c \
-		$(srcdir)/ismounted.c $(srcdir)/e2undo.c \
+		$(srcdir)/ismounted.c $(srcdir)/e2undo.c $(srcdir)/e2patch.c \
 		$(srcdir)/e2freefrag.c $(srcdir)/create_inode.c \
 		$(srcdir)/fuse2fs.c \
 		$(srcdir)/../debugfs/journal.c $(srcdir)/../e2fsck/revoke.c \
@@ -133,7 +135,7 @@ all:: profiled $(SPROGS) $(UPROGS) $(USPROGS) $(SMANPAGES) $(UMANPAGES) \
 	$(FMANPAGES) $(LPROGS) $(E4DEFRAG_PROG) $(E4CRYPT_PROGS) e2fuzz
 
 @PROFILE_CMT@all:: tune2fs.profiled blkid.profiled e2image.profiled \
-	e2undo.profiled mke2fs.profiled dumpe2fs.profiled fsck.profiled \
+	e2undo.profiled e2patch.profiled mke2fs.profiled dumpe2fs.profiled fsck.profiled \
 	logsave.profiled filefrag.profiled uuidgen.profiled $(UUIDD_PROFILED) \
 	e2image.profiled e4defrag.profiled e4crypt.profiled \
 	e2freefrag.profiled
@@ -226,6 +228,16 @@ e2undo.profiled: $(E2UNDO_OBJS) $(PROFILED_DEPLIBS)
 	$(Q) $(CC) $(ALL_LDFLAGS) -g -pg -o e2undo.profiled \
 		$(PROFILED_E2UNDO_OBJS) $(PROFILED_LIBS) $(LIBINTL) $(SYSLIBS)
 
+e2patch: $(E2PATCH_OBJS) $(DEPLIBS)
+	$(E) "	LD $@"
+	$(Q) $(CC) $(ALL_LDFLAGS) -o e2patch $(E2PATCH_OBJS) $(LIBS) \
+		$(LIBINTL) $(SYSLIBS)
+
+e2patch.profiled: $(E2PATCH_OBJS) $(PROFILED_DEPLIBS)
+	$(E) "	LD $@"
+	$(Q) $(CC) $(ALL_LDFLAGS) -g -pg -o e2patch.profiled \
+		$(PROFILED_E2PATCH_OBJS) $(PROFILED_LIBS) $(LIBINTL) $(SYSLIBS)
+
 e4defrag: $(E4DEFRAG_OBJS) $(DEPLIBS)
 	$(E) "	LD $@"
 	$(Q) $(CC) $(ALL_LDFLAGS) -o e4defrag $(E4DEFRAG_OBJS) $(LIBS) \
@@ -439,6 +451,10 @@ e2undo.8: $(DEP_SUBSTITUTE) $(srcdir)/e2undo.8.in
 	$(E) "	SUBST $@"
 	$(Q) $(SUBSTITUTE_UPTIME) $(srcdir)/e2undo.8.in e2undo.8
 
+e2patch.8: $(DEP_SUBSTITUTE) $(srcdir)/e2patch.8.in
+	$(E) "	SUBST $@"
+	$(Q) $(SUBSTITUTE_UPTIME) $(srcdir)/e2patch.8.in e2patch.8
+
 findfs.8: $(DEP_SUBSTITUTE) $(srcdir)/findfs.8.in
 	$(E) "	SUBST $@"
 	$(Q) $(SUBSTITUTE_UPTIME) $(srcdir)/findfs.8.in findfs.8
@@ -669,7 +685,7 @@ clean::
 		e2initrd_helper partinfo prof_err.[ch] default_profile.c \
 		uuidd e2image tune2fs.static tst_ismounted fsck.profiled \
 		blkid.profiled tune2fs.profiled e2image.profiled \
-		e2undo.profiled mke2fs.profiled dumpe2fs.profiled \
+		e2undo.profiled e2patch.profiled mke2fs.profiled dumpe2fs.profiled \
 		logsave.profiled filefrag.profiled uuidgen.profiled \
 		uuidd.profiled e2image.profiled e2fuzz mke2fs.conf \
 		profiled/*.o \#* *.s *.o *.a *~ core gmon.out
@@ -792,6 +808,12 @@ e2undo.o: $(srcdir)/e2undo.c $(top_builddir)/lib/config.h \
  $(top_srcdir)/lib/ext2fs/ext2_io.h $(top_builddir)/lib/ext2fs/ext2_err.h \
  $(top_srcdir)/lib/ext2fs/ext2_ext_attr.h $(top_srcdir)/lib/ext2fs/bitops.h \
  $(top_srcdir)/lib/support/nls-enable.h
+e2patch.o: $(srcdir)/e2patch.c $(top_builddir)/lib/config.h \
+ $(top_builddir)/lib/dirpaths.h $(top_srcdir)/lib/ext2fs/ext2fs.h \
+ $(top_builddir)/lib/ext2fs/ext2_types.h $(top_srcdir)/lib/ext2fs/ext2_fs.h \
+ $(top_srcdir)/lib/ext2fs/ext3_extents.h $(top_srcdir)/lib/et/com_err.h \
+ $(top_srcdir)/lib/ext2fs/ext2_io.h $(top_builddir)/lib/ext2fs/ext2_err.h \
+ $(top_srcdir)/lib/ext2fs/ext2_ext_attr.h $(top_srcdir)/lib/ext2fs/bitops.h
 e2freefrag.o: $(srcdir)/e2freefrag.c $(top_builddir)/lib/config.h \
  $(top_builddir)/lib/dirpaths.h $(top_srcdir)/lib/ext2fs/ext2_fs.h \
  $(top_builddir)/lib/ext2fs/ext2_types.h $(top_srcdir)/lib/ext2fs/ext2fs.h \

misc/e2patch.8.in

@@ -0,0 +1,31 @@
+.TH E2PATCH 8 "@E2FSPROGS_MONTH@ @E2FSPROGS_YEAR@" "E2fsprogs version @E2FSPROGS_VERSION@"
+.SH NAME
+e2patch \- patch tool for safely applying libext2fs patch files to block devices
+.SH SYNOPSIS
+.B e2patch backup \fI<device>\fR \fI<patch_file>\fR \fI<backup_file>\fR
+.br
+.B e2patch apply \fI<device>\fR \fI<patch_file>\fR
+.SH DESCRIPTION
+.B e2patch
+applies and restores "patches" produced by e2fsprogs with patch file option
+(\fBresize2fs -T <patch_file>\fR) to block devices.
+.PP
+"Patch files" are sparse files containing overwritten device blocks and
+a block bitmap.
+.PP
+"Patch files" are faster, safer and simpler to use than "undo files"
+(\fBe2undo\fR and \fBresize2fs -z <undo_file>\fR), even though their original
+design goal is similar.
+.SH COMMANDS
+.TP
+.B e2patch backup \fI<device>\fR \fI<patch_file>\fR \fI<backup_file>\fR
+Creates a backup in <backup_file> for restoring after bad patch <patch_file>.
+Backup can then also be applied with \fBe2patch apply\fR
+.TP
+.B e2patch apply \fI<device>\fR \fI<patch_file>\fR
+Apply <patch_file> to <device>.
+.SH AUTHOR
+Written by Vitaliy Filippov <vitalif@mail.ru>
+.SH SEE ALSO
+.BR resize2fs (8),
+.BR e2undo (8).

misc/e2patch.c

@@ -0,0 +1,166 @@
+/**
+ * e2patch.c --- Utility to apply/restore patches created by patch_io_manager.
+ *
+ * Copyright (c) Vitaliy Filippov <vitalif@mail.ru> 2014
+ * License: GNU GPLv2 or later
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <errno.h>
+
+#include "ext2fs/ext2_fs.h"
+#include "ext2fs/ext2fs.h"
+
+#include "ext2fs/patch.h"
+
+#define BUF 0x10000
+#define _(a) (a)
+
+errcode_t make_backup_patch(char *device, char *io_options, char *patch_file, char *backup_file)
+{
+    io_manager mgr = unix_io_manager;
+    io_channel io;
+    errcode_t retval;
+    blk64_t blk, start, buf_blocks;
+    int eq;
+    void *buf = NULL;
+    struct ext2fs_patch_file patch = { 0 }, backup = { 0 };
+    retval = mgr->open(device, IO_FLAG_EXCLUSIVE, &io);
+    if (retval) goto out;
+    if (io_options &&
+        (retval = io_channel_set_options(io, io_options)))
+        goto out;
+    retval = ext2fs_patch_open(&patch, patch_file, 0);
+    if (retval) goto out;
+    retval = ext2fs_patch_open(&backup, backup_file, O_CREAT);
+    if (retval) goto out;
+    backup.block_size = patch.block_size;
+    backup.size = patch.size;
+    ext2fs_patch_init_bmap(&backup, NULL);
+    buf_blocks = BUF/patch.block_size;
+    retval = mgr->set_blksize(io, patch.block_size);
+    if (retval) goto out;
+    buf = malloc(BUF);
+    for (start = 0, blk = 0; blk <= patch.size; blk++)
+    {
+        if ((eq = !ext2fs_test_generic_bitmap(patch.bmap, blk)) || blk >= patch.size || blk-start >= buf_blocks)
+        {
+            if (start != blk)
+            {
+                retval = io_channel_read_blk64(io, start, blk-start, buf);
+                if (retval) goto out;
+                retval = ext2fs_patch_write_blk64(&backup, start, blk-start, buf);
+                if (retval) goto out;
+            }
+            start = blk+eq;
+        }
+    }
+out:
+    if (buf)
+        free(buf);
+    ext2fs_patch_close(&backup);
+    ext2fs_patch_close(&patch);
+    mgr->close(io);
+    return retval;
+}
+
+errcode_t apply_patch(char *device, char *io_options, char *patch_file)
+{
+    io_manager mgr = unix_io_manager;
+    io_channel io;
+    errcode_t retval;
+    blk64_t blk, start, buf_blocks;
+    int eq;
+    void *buf = NULL;
+    struct ext2fs_patch_file patch = { 0 };
+    retval = mgr->open(device, IO_FLAG_EXCLUSIVE|IO_FLAG_RW, &io);
+    if (retval) goto out;
+    if (io_options &&
+        (retval = io_channel_set_options(io, io_options)))
+        goto out;
+    retval = ext2fs_patch_open(&patch, patch_file, 0);
+    if (retval) goto out;
+    buf_blocks = BUF/patch.block_size;
+    retval = mgr->set_blksize(io, patch.block_size);
+    if (retval) goto out;
+    buf = malloc(BUF);
+    for (start = 0, blk = 0; blk <= patch.size; blk++)
+    {
+        if ((eq = blk < patch.size && !ext2fs_test_generic_bitmap(patch.bmap, blk)) || blk >= patch.size || blk-start >= buf_blocks)
+        {
+            if (start != blk)
+            {
+                retval = ext2fs_patch_retry_read_at(patch.patch_fd, patch.offset + start*patch.block_size, (blk-start)*patch.block_size, buf);
+                if (retval) goto out;
+                retval = io_channel_write_blk64(io, start, blk-start, buf);
+                if (retval) goto out;
+            }
+            start = blk+eq;
+        }
+    }
+out:
+    if (buf)
+        free(buf);
+    ext2fs_patch_close(&patch);
+    mgr->close(io);
+    return retval;
+}
+
+int main(int narg, char **args)
+{
+    errcode_t retval;
+    char *io_options = NULL;
+    if (narg >= 5 && !strcmp(args[1], "backup"))
+    {
+        io_options = strchr(args[2], '?');
+        if (io_options)
+            *io_options++ = 0;
+        retval = make_backup_patch(args[2], io_options, args[3], args[4]);
+    }
+    else if (narg >= 4 && !strcmp(args[1], "apply"))
+    {
+        io_options = strchr(args[2], '?');
+        if (io_options)
+            *io_options++ = 0;
+        retval = apply_patch(args[2], io_options, args[3]);
+    }
+    else
+    {
+        printf(
+            "Patch tool for safely applying changes to block devices\n"
+            "License: GNU GPLv2 or later\n"
+            "Copyright (c) Vitaliy Filippov, 2014\n\n"
+            "To create a backup for restoring after bad patch:\n"
+            "  e2patch backup <filesystem> <patch_file> <backup_file>\n"
+            "To apply a patch:\n"
+            "  e2patch apply <filesystem> <patch_file>\n"
+        );
+        return 0;
+    }
+    if (retval)
+    {
+        com_err("e2patch", retval, _("while trying to %s"), args[1]);
+    }
+    return 0;
+}

misc/filefrag.c

@@ -474,6 +474,10 @@ static int frag_report(const char *filename)
 	}
 
 	if (force_bmap || rc < 0) { /* FIEMAP failed, try FIBMAP instead */
+		if (numblocks > (unsigned long)-1L) {
+			fprintf(stderr, "%s: File too big to use FIBMAP\n", filename);
+			goto out_close;
+		}
 		expected = filefrag_fibmap(fd, blk_shift, &num_extents,
 					   &st, numblocks, is_ext2);
 		if (expected < 0) {

po/POTFILES.in

@@ -43,6 +43,7 @@ misc/e2image.c
 misc/e2initrd_helper.c
 misc/e2label.c
 misc/e2undo.c
+misc/e2patch.c
 misc/e4crypt.c
 misc/e4defrag.c
 misc/filefrag.c

resize/main.c

@@ -46,8 +46,8 @@ static char *device_name, *io_options;
 
 static void usage (char *prog)
 {
-	fprintf (stderr, _("Usage: %s [-d debug_flags] [-f] [-F] [-M] [-P] "
-			   "[-p] device [-b|-s|new_size] [-z undo_file]\n\n"),
+	fprintf (stderr, _("Usage: %s [-d debug_flags] [-f] [-F] [-M] [-N new_inodes] [-P] "
+			   "[-p] device [-b|-s|new_size] [-T patch_file] [-z undo_file]\n\n"),
 		 prog);
 
 	exit (1);
@@ -167,6 +167,20 @@ static void bigalloc_check(ext2_filsys fs, int force)
 	}
 }
 
+static int resize2fs_setup_patch(const char *device, char *patch_file,
+			       io_manager *io_ptr)
+{
+	set_patch_io_backing_manager(*io_ptr);
+	set_patch_io_patch_file(patch_file);
+	*io_ptr = patch_io_manager;
+	printf(_("To make backup before applying changes run:\n"
+		"  e2patch backup %s %s %s.backup\n"
+		"Then, to apply the operation to the real filesystem run:\n"
+		"  e2patch apply %s %s\n"),
+		device, patch_file, patch_file, device, patch_file);
+	return 0;
+}
+
 static int resize2fs_setup_tdb(const char *device, char *undo_file,
 			       io_manager *io_ptr)
 {
@@ -258,6 +272,7 @@ int main (int argc, char ** argv)
 	blk64_t		new_size = 0;
 	blk64_t		max_size = 0;
 	blk64_t		min_size = 0;
+	__u32		new_inodes = 0;
 	io_manager	io_ptr;
 	char		*new_size_str = 0;
 	int		use_stride = -1;
@@ -267,7 +282,7 @@ int main (int argc, char ** argv)
 	unsigned int	blocksize;
 	long		sysval;
 	int		len, mount_flags;
-	char		*mtpt, *undo_file = NULL;
+	char		*mtpt, *undo_file = NULL, *patch_file = NULL;
 
 #ifdef ENABLE_NLS
 	setlocale(LC_MESSAGES, "");
@@ -284,7 +299,7 @@ int main (int argc, char ** argv)
 	if (argc && *argv)
 		program_name = *argv;
 
-	while ((c = getopt(argc, argv, "d:fFhMPpS:bsz:")) != EOF) {
+	while ((c = getopt(argc, argv, "d:fFhMPN:pS:bsT:z:")) != EOF) {
 		switch (c) {
 		case 'h':
 			usage(program_name);
@@ -301,6 +316,9 @@ int main (int argc, char ** argv)
 		case 'P':
 			print_min_size = 1;
 			break;
+		case 'N':
+			new_inodes = strtoul(optarg, 0, 0);
+			break;
 		case 'd':
 			flags |= atoi(optarg);
 			break;
@@ -316,6 +334,9 @@ int main (int argc, char ** argv)
 		case 's':
 			flags |= RESIZE_DISABLE_64BIT;
 			break;
+		case 'T':
+			patch_file = optarg;
+			break;
 		case 'z':
 			undo_file = optarg;
 			break;
@@ -402,7 +423,11 @@ int main (int argc, char ** argv)
 		io_flags = EXT2_FLAG_RW | EXT2_FLAG_EXCLUSIVE;
 
 	io_flags |= EXT2_FLAG_64BITS;
-	if (undo_file) {
+	if (patch_file) {
+		retval = resize2fs_setup_patch(device_name, patch_file, &io_ptr);
+		if (retval)
+			exit(1);
+	} else if (undo_file) {
 		retval = resize2fs_setup_tdb(device_name, undo_file, &io_ptr);
 		if (retval)
 			exit(1);
@@ -583,7 +608,7 @@ int main (int argc, char ** argv)
 				"feature.\n"));
 			exit(1);
 		}
-	} else if (new_size == ext2fs_blocks_count(fs->super)) {
+	} else if (new_size == ext2fs_blocks_count(fs->super) && !new_inodes) {
 		fprintf(stderr, _("The filesystem is already %llu (%dk) "
 			"blocks long.  Nothing to do!\n\n"), new_size,
 			blocksize / 1024);
@@ -612,7 +637,7 @@ int main (int argc, char ** argv)
 			printf(_("Resizing the filesystem on "
 				 "%s to %llu (%dk) blocks.\n"),
 			       device_name, new_size, blocksize / 1024);
-		retval = resize_fs(fs, &new_size, flags,
+		retval = resize_fs(fs, &new_size, new_inodes, flags,
 				   ((flags & RESIZE_PERCENT_COMPLETE) ?
 				    resize_progress_func : 0));
 	}

resize/resize2fs.8.in

@@ -159,6 +159,12 @@ program will heuristically determine the RAID stride that was specified
 when the filesystem was created.  This option allows the user to
 explicitly specify a RAID stride setting to be used by resize2fs instead.
 .TP
+.BI \-T " patch_file"
+Do not apply changes to the real filesystem; write updates into a sparse file
+named 'patch_file' to safely apply them later with e2patch(8) utility.
+You'll also be able to create a backup before applying patch and safely
+restore it in case of power outage or system crash.
+.TP
 .BI \-z " undo_file"
 Before overwriting a file system block, write the old contents of the block to
 an undo file.  This undo file can be used with e2undo(8) to restore the old

resize/resize2fs.c

@@ -45,19 +45,21 @@ static void fix_uninit_block_bitmaps(ext2_filsys fs);
 static errcode_t adjust_superblock(ext2_resize_t rfs, blk64_t new_size);
 static errcode_t blocks_to_move(ext2_resize_t rfs);
 static errcode_t block_mover(ext2_resize_t rfs);
+static errcode_t inodes_to_move(ext2_resize_t rfs);
 static errcode_t inode_scan_and_fix(ext2_resize_t rfs);
 static errcode_t inode_ref_fix(ext2_resize_t rfs);
 static errcode_t move_itables(ext2_resize_t rfs);
+static errcode_t move_inode_tables(ext2_resize_t rfs);
 static errcode_t fix_resize_inode(ext2_filsys fs);
 static errcode_t ext2fs_calculate_summary_stats(ext2_filsys fs);
 static errcode_t fix_sb_journal_backup(ext2_filsys fs);
 static errcode_t mark_table_blocks(ext2_filsys fs,
-				   ext2fs_block_bitmap bmap);
+				   ext2fs_block_bitmap bmap, int skip_inode_tables);
 static errcode_t clear_sparse_super2_last_group(ext2_resize_t rfs);
 static errcode_t reserve_sparse_super2_last_group(ext2_resize_t rfs,
 						 ext2fs_block_bitmap meta_bmap);
 static errcode_t resize_group_descriptors(ext2_resize_t rfs, blk64_t new_size);
-static errcode_t move_bg_metadata(ext2_resize_t rfs);
+static errcode_t move_bg_metadata(ext2_resize_t rfs, __u32 new_inodes);
 static errcode_t zero_high_bits_in_inodes(ext2_resize_t rfs);
 
 /*
@@ -94,7 +96,7 @@ static int lazy_itable_init;
 /*
  * This is the top-level routine which does the dirty deed....
  */
-errcode_t resize_fs(ext2_filsys fs, blk64_t *new_size, int flags,
+errcode_t resize_fs(ext2_filsys fs, blk64_t *new_size, __u32 new_inodes, int flags,
 	    errcode_t (*progress)(ext2_resize_t rfs, int pass,
 					  unsigned long cur,
 					  unsigned long max_val))
@@ -142,7 +144,7 @@ errcode_t resize_fs(ext2_filsys fs, blk64_t *new_size, int flags,
 	print_resource_track(rfs, &rtrack, fs->io);
 
 	init_resource_track(&rtrack, "move_bg_metadata", fs->io);
-	retval = move_bg_metadata(rfs);
+	retval = move_bg_metadata(rfs, new_inodes);
 	if (retval)
 		goto errout;
 	print_resource_track(rfs, &rtrack, fs->io);
@@ -188,6 +190,18 @@ errcode_t resize_fs(ext2_filsys fs, blk64_t *new_size, int flags,
 		goto errout;
 	print_resource_track(rfs, &rtrack, fs->io);
 
+	init_resource_track(&rtrack, "inodes_to_move", fs->io);
+	retval = inodes_to_move(rfs);
+	if (retval)
+		goto errout;
+	print_resource_track(rfs, &rtrack, fs->io);
+
+	init_resource_track(&rtrack, "move_inode_tables", fs->io);
+	retval = move_inode_tables(rfs);
+	if (retval)
+		goto errout;
+	print_resource_track(rfs, &rtrack, fs->io);
+
 	init_resource_track(&rtrack, "inode_scan_and_fix", fs->io);
 	retval = inode_scan_and_fix(rfs);
 	if (retval)
@@ -200,11 +214,11 @@ errcode_t resize_fs(ext2_filsys fs, blk64_t *new_size, int flags,
 		goto errout;
 	print_resource_track(rfs, &rtrack, fs->io);
 
-	init_resource_track(&rtrack, "move_itables", fs->io);
+/*	init_resource_track(&rtrack, "move_itables", fs->io);
 	retval = move_itables(rfs);
 	if (retval)
 		goto errout;
-	print_resource_track(rfs, &rtrack, fs->io);
+	print_resource_track(rfs, &rtrack, fs->io);*/
 
 	retval = clear_sparse_super2_last_group(rfs);
 	if (retval)
@@ -344,8 +358,39 @@ static errcode_t resize_group_descriptors(ext2_resize_t rfs, blk64_t new_size)
 	return 0;
 }
 
+/**
+ * Inode table resizing:
+ * 1) move_bg_metadata(), calls set_inode_count(): set new inode count
+ * 2) adjust_superblock(): extend bitmaps, write group descriptors
+ * 3) blocks_to_move(): allocate new inode tables and, when extending inode tables,
+ *    mark extra blocks needed for new inode tables as 'blocks to move'
+ * 4) block_mover(): move blocks out of the way as usual
+ * 5) inodes_to_move(): when shrinking inode tables, move inodes from the end
+ *    of each group's inode table (still operating on old fs inode tables).
+ *    it would be possible to rewrite blocks on step 7, but we need to read
+ *    extents, and they may be overwritten by inode tables on step 6.
+ *    so, rewrite blocks used by inodes here!
+ * 6) move_inode_tables(): move inode tables
+ * 7) inode_scan_and_fix(): rewrite all inode, extent, extattr and ACL checksums
+ * 8) inode_ref_fix(): translate inode numbers (operating on new fs inode tables)
+ */
+static int set_inode_count(ext2_filsys fs, __u32 new_inodes)
+{
+	__u32 old_ipg = fs->super->s_inodes_per_group;
+	__u32 new_ipg = ((new_inodes + fs->group_desc_count - 1) / fs->group_desc_count);
+	new_ipg = (((new_ipg * EXT2_INODE_SIZE(fs->super)) + EXT2_BLOCK_SIZE(fs->super) - 1) / EXT2_BLOCK_SIZE(fs->super))
+		* EXT2_BLOCK_SIZE(fs->super) / EXT2_INODE_SIZE(fs->super);
+	if (new_ipg == old_ipg)
+		return -1;
+	fs->inode_blocks_per_group = new_ipg * EXT2_INODE_SIZE(fs->super) / EXT2_BLOCK_SIZE(fs->super);
+	fs->super->s_inodes_per_group = new_ipg;
+	fs->super->s_inodes_count = fs->group_desc_count * fs->super->s_inodes_per_group;
+	fs->super->s_free_inodes_count += fs->group_desc_count * (new_ipg - old_ipg);
+	return 0;
+}
+
 /* Move bitmaps/inode tables out of the way. */
-static errcode_t move_bg_metadata(ext2_resize_t rfs)
+static errcode_t move_bg_metadata(ext2_resize_t rfs, __u32 new_inodes)
 {
 	dgrp_t i;
 	blk64_t b, c, d, old_desc_blocks, new_desc_blocks, j;
@@ -354,7 +399,12 @@ static errcode_t move_bg_metadata(ext2_resize_t rfs)
 	errcode_t retval;
 	int cluster_ratio;
 
-	if (!(rfs->flags & (RESIZE_DISABLE_64BIT | RESIZE_ENABLE_64BIT)))
+	if (new_inodes) {
+		if (set_inode_count(rfs->new_fs, new_inodes) != 0)
+			new_inodes = 0;
+	}
+
+	if (!new_inodes && !(rfs->flags & (RESIZE_DISABLE_64BIT | RESIZE_ENABLE_64BIT)))
 		return 0;
 
 	retval = ext2fs_allocate_block_bitmap(rfs->old_fs, "oldfs", &old_map);
@@ -644,7 +694,7 @@ static errcode_t free_gdp_blocks(ext2_filsys fs,
 		if (retval)
 			goto out;
 
-		retval = mark_table_blocks(fs, bg_map);
+		retval = mark_table_blocks(fs, bg_map, 0);
 		if (retval)
 			goto out;
 	}
@@ -1011,7 +1061,7 @@ retry:
 	 * number of the block group descriptors.
 	 */
 	if (reserve_blocks)
-		mark_table_blocks(fs, reserve_blocks);
+		mark_table_blocks(fs, reserve_blocks, 0);
 
 errout:
 	return (retval);
@@ -1145,7 +1195,7 @@ errout:
  * filesystem meta-data blocks.
  */
 static errcode_t mark_table_blocks(ext2_filsys fs,
-				   ext2fs_block_bitmap bmap)
+				   ext2fs_block_bitmap bmap, int skip_inode_tables)
 {
 	dgrp_t			i;
 	blk64_t			blk;
@@ -1156,10 +1206,12 @@ static errcode_t mark_table_blocks(ext2_filsys fs,
 		/*
 		 * Mark the blocks used for the inode table
 		 */
-		blk = ext2fs_inode_table_loc(fs, i);
-		if (blk)
-			ext2fs_mark_block_bitmap_range2(bmap, blk,
-						fs->inode_blocks_per_group);
+		if (!skip_inode_tables) {
+			blk = ext2fs_inode_table_loc(fs, i);
+			if (blk)
+				ext2fs_mark_block_bitmap_range2(bmap, blk,
+							fs->inode_blocks_per_group);
+		}
 
 		/*
 		 * Mark block used for the block bitmap
@@ -1283,12 +1335,69 @@ static errcode_t blocks_to_move(ext2_resize_t rfs)
 	if (retval)
 		return retval;
 
-	retval = mark_table_blocks(old_fs, meta_bmap);
+	retval = mark_table_blocks(old_fs, meta_bmap, 0);
 	if (retval)
 		return retval;
 
 	fs = rfs->new_fs;
 
+	/**
+	 * If we're resizing inode tables, we need to reallocate all of them
+	 */
+	if (rfs->old_fs->inode_blocks_per_group != fs->inode_blocks_per_group) {
+		dgrp_t flexbg_size, flex_count, grp_in_flex;
+		ext2fs_block_bitmap	empty_bmap;
+/*		// this is how mke2fs allocates inode tables...
+		retval = ext2fs_make_generic_bitmap(EXT2_ET_MAGIC_BLOCK_BITMAP, fs,
+			fs->super->s_first_data_block,
+			ext2fs_blocks_count(fs->super)-1,
+			ext2fs_blocks_count(fs->super)-1, "subcluster inode table bitmap", 0, &empty_bmap);*/
+		retval = ext2fs_allocate_block_bitmap(fs, _("metadata without inode tables"), &empty_bmap);
+		if (retval) {
+			return retval;
+		}
+		retval = mark_table_blocks(fs, empty_bmap, 1);
+		if (retval) {
+			return retval;
+		}
+		if (EXT2_HAS_INCOMPAT_FEATURE(fs->super, EXT4_FEATURE_INCOMPAT_FLEX_BG)
+			&& fs->super->s_log_groups_per_flex) {
+			flexbg_size = 1 << fs->super->s_log_groups_per_flex;
+		} else {
+			flexbg_size = 1;
+		}
+		flex_count = (fs->group_desc_count + flexbg_size - 1) / flexbg_size;
+		for (g = 0; g < fs->group_desc_count; g++) {
+			ext2fs_inode_table_loc_set(fs, g, 0);
+			retval = ext2fs_allocate_group_table(fs, g, empty_bmap);
+			if (retval) {
+				return retval;
+			}
+/*			ext2fs_mark_block_bitmap_range2(empty_bmap,
+				ext2fs_inode_table_loc(fs, g), fs->inode_blocks_per_group);*/
+			group_blk = ext2fs_inode_table_loc(fs, g);
+			if (g > 0 && group_blk < ext2fs_inode_table_loc(fs, g-1)+fs->inode_blocks_per_group) {
+				ext2fs_unmark_block_bitmap_range2(fs->block_map, group_blk, fs->inode_blocks_per_group);
+				group_blk = ext2fs_inode_table_loc(fs, g-1)+fs->inode_blocks_per_group;
+				ext2fs_inode_table_loc_set(fs, g, group_blk);
+				ext2fs_group_desc_csum_set(fs, g);
+				ext2fs_mark_block_bitmap_range2(fs->block_map, group_blk, fs->inode_blocks_per_group);
+			}
+			group_blk += fs->inode_blocks_per_group;
+			// We may need to move some blocks away (mainly if extending inode tables)
+			for (blk = ext2fs_inode_table_loc(fs, g); blk < group_blk; blk++) {
+				if (blk < ext2fs_blocks_count(old_fs->super) &&
+					ext2fs_test_block_bitmap2(old_fs->block_map, blk) &&
+				    !ext2fs_test_block_bitmap2(meta_bmap, blk)) {
+					ext2fs_mark_block_bitmap2(rfs->move_blocks, blk);
+					rfs->needed_blocks++;
+				}
+				ext2fs_mark_block_bitmap2(rfs->reserve_blocks, blk);
+			}
+		}
+		ext2fs_free_block_bitmap(empty_bmap);
+	}
+
 	/*
 	 * If we're shrinking the filesystem, we need to move any
 	 * group's metadata blocks (either allocation bitmaps or the
@@ -1387,7 +1496,7 @@ static errcode_t blocks_to_move(ext2_resize_t rfs)
 			if (retval)
 				goto errout;
 
-			retval = mark_table_blocks(fs, new_meta_bmap);
+			retval = mark_table_blocks(fs, new_meta_bmap, 0);
 			if (retval)
 				goto errout;
 		}
@@ -1848,7 +1957,7 @@ static int process_block(ext2_filsys fs, blk64_t	*block_nr,
 		}
 	}
 
-	if (pb->is_dir) {
+	if (pb->is_dir && fs->dblist) {
 		retval = ext2fs_add_dir_block2(fs->dblist, pb->ino,
 					       block, (int) blockcnt);
 		if (retval) {
@@ -1895,27 +2004,27 @@ static errcode_t migrate_ea_block(ext2_resize_t rfs, ext2_ino_t ino,
 	errcode_t err = 0;
 
 	/* No EA block or no remapping?  Quit early. */
-	if (ext2fs_file_acl_block(rfs->old_fs, inode) == 0 || !rfs->bmap)
+	if (ext2fs_file_acl_block(rfs->new_fs, inode) == 0 || !rfs->bmap)
 		return 0;
-	new_block = extent_translate(rfs->old_fs, rfs->bmap,
-		ext2fs_file_acl_block(rfs->old_fs, inode));
+	new_block = extent_translate(rfs->new_fs, rfs->bmap,
+		ext2fs_file_acl_block(rfs->new_fs, inode));
 	if (new_block == 0)
 		return 0;
 
 	/* Set the new ACL block */
-	ext2fs_file_acl_block_set(rfs->old_fs, inode, new_block);
+	ext2fs_file_acl_block_set(rfs->new_fs, inode, new_block);
 
 	/* Update checksum */
 	if (ext2fs_has_feature_metadata_csum(rfs->new_fs->super)) {
-		err = ext2fs_get_mem(rfs->old_fs->blocksize, &buf);
+		err = ext2fs_get_mem(rfs->new_fs->blocksize, &buf);
 		if (err)
 			return err;
-		rfs->old_fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
-		err = ext2fs_read_ext_attr3(rfs->old_fs, new_block, buf, ino);
-		rfs->old_fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
+		rfs->new_fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
+		err = ext2fs_read_ext_attr3(rfs->new_fs, new_block, buf, ino);
+		rfs->new_fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
 		if (err)
 			goto out;
-		err = ext2fs_write_ext_attr3(rfs->old_fs, new_block, buf, ino);
+		err = ext2fs_write_ext_attr3(rfs->new_fs, new_block, buf, ino);
 		if (err)
 			goto out;
 	}
@@ -1986,52 +2095,62 @@ static void quiet_com_err_proc(const char *whoami EXT2FS_ATTR((unused)),
 {
 }
 
-static errcode_t inode_scan_and_fix(ext2_resize_t rfs)
+#define TRANSLATE_IPG(ino,old_fs,new_fs) (1 + (((ino)-1) % (old_fs)->super->s_inodes_per_group) + \
+	((ino)-1) / (old_fs)->super->s_inodes_per_group * (new_fs)->super->s_inodes_per_group)
+
+/**
+ * Move inodes and rewrite references to blocks moved in blocks_to_move()
+ */
+static errcode_t inodes_to_move(ext2_resize_t rfs)
 {
 	struct process_block_struct	pb;
-	ext2_ino_t		ino, new_inode;
+	ext2_ino_t		ino, new_inode, tr_ino;
 	struct ext2_inode 	*inode = NULL;
 	ext2_inode_scan 	scan = NULL;
 	errcode_t		retval;
+	dgrp_t			g, old_g;
 	char			*block_buf = 0;
 	ext2_ino_t		start_to_move;
 	int			inode_size;
+	int			shrink_inodes = rfs->old_fs->inode_blocks_per_group > rfs->new_fs->inode_blocks_per_group;
+	int			change_inodes = rfs->old_fs->inode_blocks_per_group != rfs->new_fs->inode_blocks_per_group;
 
 	if ((rfs->old_fs->group_desc_count <=
 	     rfs->new_fs->group_desc_count) &&
-	    !rfs->bmap)
+	    !rfs->bmap &&
+	    !change_inodes)
 		return 0;
 
-	set_com_err_hook(quiet_com_err_proc);
-
 	retval = ext2fs_open_inode_scan(rfs->old_fs, 0, &scan);
 	if (retval) goto errout;
 
-	retval = ext2fs_init_dblist(rfs->old_fs, 0);
-	if (retval) goto errout;
-	retval = ext2fs_get_array(rfs->old_fs->blocksize, 3, &block_buf);
-	if (retval) goto errout;
-
 	start_to_move = (rfs->new_fs->group_desc_count *
-			 rfs->new_fs->super->s_inodes_per_group);
-
-	if (rfs->progress) {
-		retval = (rfs->progress)(rfs, E2_RSZ_INODE_SCAN_PASS,
-					 0, rfs->old_fs->group_desc_count);
-		if (retval)
-			goto errout;
+		 rfs->old_fs->super->s_inodes_per_group);
+	for (ino = start_to_move+1; ino <= rfs->old_fs->group_desc_count * rfs->old_fs->super->s_inodes_per_group; ino++) {
+		ext2fs_mark_inode_bitmap2(rfs->old_fs->inode_map, ino);
 	}
-	ext2fs_set_inode_callback(scan, progress_callback, (void *) rfs);
-	pb.rfs = rfs;
-	pb.inode = inode;
-	pb.error = 0;
-	new_inode = EXT2_FIRST_INODE(rfs->new_fs->super);
+	if (shrink_inodes) {
+		for (g = 0; g < rfs->old_fs->group_desc_count; g++) {
+			ext2_ino_t first_ino = 1+rfs->old_fs->super->s_inodes_per_group*g;
+			for (ino = first_ino+rfs->new_fs->super->s_inodes_per_group; ino < first_ino+rfs->old_fs->super->s_inodes_per_group; ino++) {
+				ext2fs_mark_inode_bitmap2(rfs->old_fs->inode_map, ino);
+			}
+		}
+	}
+
+	retval = ext2fs_get_array(rfs->new_fs->blocksize, 3, &block_buf);
+	if (retval) goto errout;
+
 	inode_size = EXT2_INODE_SIZE(rfs->new_fs->super);
 	inode = malloc(inode_size);
 	if (!inode) {
 		retval = ENOMEM;
 		goto errout;
 	}
+	pb.rfs = rfs;
+	pb.inode = inode;
+	pb.error = 0;
+
 	/*
 	 * First, copy all of the inodes that need to be moved
 	 * elsewhere in the inode table
@@ -2045,78 +2164,68 @@ static errcode_t inode_scan_and_fix(ext2_resize_t rfs)
 		if (inode->i_links_count == 0 && ino != EXT2_RESIZE_INO)
 			continue; /* inode not in use */
 
-		pb.is_dir = LINUX_S_ISDIR(inode->i_mode);
-		pb.changed = 0;
-
-		/* Remap EA block */
-		retval = migrate_ea_block(rfs, ino, inode, &pb.changed);
-		if (retval)
-			goto errout;
-
 		new_inode = ino;
-		if (ino <= start_to_move)
-			goto remap_blocks; /* Don't need to move inode. */
+		if (ino > start_to_move ||
+			(shrink_inodes && (ino-1) % rfs->old_fs->super->s_inodes_per_group >= rfs->new_fs->super->s_inodes_per_group))
+		{
+			/*
+			 * Find a new inode.  Now that extents and directory blocks
+			 * are tied to the inode number through the checksum, we must
+			 * set up the new inode before we start rewriting blocks.
+			 */
+			retval = ext2fs_new_inode(rfs->old_fs, 0, 0, 0, &new_inode);
+			if (retval)
+				goto errout;
 
-		/*
-		 * Find a new inode.  Now that extents and directory blocks
-		 * are tied to the inode number through the checksum, we must
-		 * set up the new inode before we start rewriting blocks.
-		 */
-		retval = ext2fs_new_inode(rfs->new_fs, 0, 0, 0, &new_inode);
-		if (retval)
-			goto errout;
+			/* Translate inode number according to new inodes_per_group */
+			tr_ino = TRANSLATE_IPG(new_inode, rfs->old_fs, rfs->new_fs);
 
-		ext2fs_inode_alloc_stats2(rfs->new_fs, new_inode, +1,
-					  pb.is_dir);
-		inode->i_ctime = time(0);
-		retval = ext2fs_write_inode_full(rfs->old_fs, new_inode,
-						inode, inode_size);
-		if (retval)
-			goto errout;
-		pb.changed = 0;
+			old_g = ext2fs_group_of_ino(rfs->old_fs, ino);
+			ext2fs_inode_alloc_stats2(rfs->old_fs, new_inode, +1, LINUX_S_ISDIR(inode->i_mode));
+			if (old_g < rfs->new_fs->group_desc_count)
+			{
+				/*
+				 * Don't bother to adjust free_inodes_count for group because freed
+				 * inodes will be accounted as part of inodes_per_group change
+				 */
+				if (LINUX_S_ISDIR(inode->i_mode))
+					ext2fs_bg_used_dirs_count_set(rfs->new_fs, old_g, ext2fs_bg_used_dirs_count(rfs->new_fs, old_g) - 1);
+				ext2fs_group_desc_csum_set(rfs->new_fs, old_g);
+			}
+			ext2fs_inode_alloc_stats2(rfs->new_fs, tr_ino, +1, LINUX_S_ISDIR(inode->i_mode));
+			inode->i_ctime = time(0);
+			retval = ext2fs_write_inode_full(rfs->old_fs, new_inode, inode, inode_size);
+			if (retval)
+				goto errout;
 
 #ifdef RESIZE2FS_DEBUG
-		if (rfs->flags & RESIZE_DEBUG_INODEMAP)
-			printf("Inode moved %u->%u\n", ino, new_inode);
+			if (rfs->flags & RESIZE_DEBUG_INODEMAP)
+				printf("Inode moved %u->%u\n", ino, new_inode);
 #endif
-		if (!rfs->imap) {
-			retval = ext2fs_create_extent_table(&rfs->imap, 0);
-			if (retval)
-				goto errout;
-		}
-		ext2fs_add_extent_entry(rfs->imap, ino, new_inode);
 
-remap_blocks:
-		if (pb.changed)
-			retval = ext2fs_write_inode_full(rfs->old_fs,
-							 new_inode,
-							 inode, inode_size);
-		if (retval)
-			goto errout;
+			if (!rfs->imap) {
+				retval = ext2fs_create_extent_table(&rfs->imap, 0);
+				if (retval)
+					goto errout;
+			}
+			ext2fs_add_extent_entry(rfs->imap, ino, new_inode);
 
-		/* Rewrite extent block checksums with new inode number */
-		if (ext2fs_has_feature_metadata_csum(rfs->old_fs->super) &&
-		    (inode->i_flags & EXT4_EXTENTS_FL)) {
-			rfs->old_fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
-			retval = rewrite_extents(rfs->old_fs, new_inode);
-			rfs->old_fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
-			if (retval)
-				goto errout;
+			// continue with rewritten inode number
+			ino = new_inode;
 		}
 
 		/*
-		 * Update inodes to point to new blocks; schedule directory
-		 * blocks for inode remapping.  Need to write out dir blocks
-		 * with new inode numbers if we have metadata_csum enabled.
+		 * Update inodes to point to new blocks.
 		 */
-		if (ext2fs_inode_has_valid_blocks2(rfs->old_fs, inode) &&
-		    (rfs->bmap || pb.is_dir)) {
-			pb.ino = new_inode;
-			pb.old_ino = ino;
+		if (ext2fs_inode_has_valid_blocks2(rfs->old_fs, inode) && rfs->bmap) {
+			pb.changed = 0;
+			pb.is_dir = LINUX_S_ISDIR(inode->i_mode);
+			pb.ino = ino;
+			pb.old_ino = ino; // FIXME debug output will show translated inodes
 			pb.has_extents = inode->i_flags & EXT4_EXTENTS_FL;
 			rfs->old_fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
 			retval = ext2fs_block_iterate3(rfs->old_fs,
-						       new_inode, 0, block_buf,
+						       ino, 0, block_buf,
 						       process_block, &pb);
 			rfs->old_fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
 			if (retval)
@@ -2125,16 +2234,134 @@ remap_blocks:
 				retval = pb.error;
 				goto errout;
 			}
-		} else if ((inode->i_flags & EXT4_INLINE_DATA_FL) &&
-			   (rfs->bmap || pb.is_dir)) {
+		}
+	}
+
+errout:
+	if (scan)
+		ext2fs_close_inode_scan(scan);
+	if (block_buf)
+		ext2fs_free_mem(&block_buf);
+	free(inode);
+	return retval;
+}
+
+/**
+ * Remap extattr blocks, rewrite inode and extattr checksums
+ * and schedule directory blocks for inode remapping
+ */
+static errcode_t inode_scan_and_fix(ext2_resize_t rfs)
+{
+	struct process_block_struct	pb;
+	ext2_ino_t		ino, tr_ino;
+	struct ext2_inode 	*inode = NULL;
+	ext2_inode_scan 	scan = NULL;
+	errcode_t		retval;
+	dgrp_t			g;
+	char			*block_buf = 0;
+	int			inode_size;
+	int			change_inodes = rfs->old_fs->inode_blocks_per_group != rfs->new_fs->inode_blocks_per_group;
+
+	if ((rfs->old_fs->group_desc_count <=
+	     rfs->new_fs->group_desc_count) &&
+	    !rfs->bmap &&
+	    !change_inodes)
+		return 0;
+
+	set_com_err_hook(quiet_com_err_proc);
+
+	retval = ext2fs_open_inode_scan(rfs->new_fs, 0, &scan);
+	if (retval) goto errout;
+
+	retval = ext2fs_init_dblist(rfs->new_fs, 0);
+	if (retval) goto errout;
+	retval = ext2fs_get_array(rfs->new_fs->blocksize, 3, &block_buf);
+	if (retval) goto errout;
+
+	if (rfs->progress) {
+		retval = (rfs->progress)(rfs, E2_RSZ_INODE_SCAN_PASS,
+					 0, rfs->new_fs->group_desc_count);
+		if (retval)
+			goto errout;
+	}
+	ext2fs_set_inode_callback(scan, progress_callback, (void *) rfs);
+	inode_size = EXT2_INODE_SIZE(rfs->new_fs->super);
+	inode = malloc(inode_size);
+	if (!inode) {
+		retval = ENOMEM;
+		goto errout;
+	}
+	pb.rfs = rfs;
+	pb.inode = inode;
+	pb.error = 0;
+	/*
+	 * First, copy all of the inodes that need to be moved
+	 * elsewhere in the inode table
+	 */
+	while (1) {
+		rfs->new_fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
+		retval = ext2fs_get_next_inode_full(scan, &ino, inode, inode_size);
+		rfs->new_fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
+		if (retval) goto errout;
+		if (!ino)
+			break;
+
+		if (inode->i_links_count == 0 && ino != EXT2_RESIZE_INO)
+			continue; /* inode not in use */
+
+		pb.is_dir = LINUX_S_ISDIR(inode->i_mode);
+		pb.changed = change_inodes;
+
+		/* Remap EA block */
+		retval = migrate_ea_block(rfs, ino, inode, &pb.changed);
+		if (retval)
+			goto errout;
+
+		if (pb.changed)
+			retval = ext2fs_write_inode_full(rfs->new_fs,
+							 ino,
+							 inode, inode_size);
+		if (retval)
+			goto errout;
+
+		/* Rewrite extent block checksums with new inode number */
+		if (ext2fs_has_feature_metadata_csum(rfs->new_fs->super) &&
+		    (inode->i_flags & EXT4_EXTENTS_FL)) {
+			rfs->new_fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
+			retval = rewrite_extents(rfs->new_fs, ino);
+			rfs->new_fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
+			if (retval)
+				goto errout;
+		}
+
+		/*
+		 * Schedule directory blocks for inode remapping. Need to write out dir blocks
+		 * with new inode numbers if we have metadata_csum enabled.
+		 */
+		if (ext2fs_inode_has_valid_blocks2(rfs->new_fs, inode) && pb.is_dir) {
+			pb.ino = ino;
+			pb.old_ino = ino; // FIXME: Debug output will show translated inodes
+			pb.has_extents = inode->i_flags & EXT4_EXTENTS_FL;
+			rfs->new_fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
+			retval = ext2fs_block_iterate3(rfs->new_fs,
+						       ino, 0, block_buf,
+						       process_block, &pb);
+			rfs->new_fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
+			if (retval)
+				goto errout;
+			if (pb.error) {
+				retval = pb.error;
+				goto errout;
+			}
+		} else if ((inode->i_flags & EXT4_INLINE_DATA_FL) && pb.is_dir) {
 			/* inline data dir; update it too */
-			retval = ext2fs_add_dir_block2(rfs->old_fs->dblist,
-						       new_inode, 0, 0);
+			retval = ext2fs_add_dir_block2(rfs->new_fs->dblist,
+						       tr_ino, 0, 0);
 			if (retval)
 				goto errout;
 		}
 	}
-	io_channel_flush(rfs->old_fs->io);
+	io_channel_flush(rfs->new_fs->io);
 
 errout:
 	reset_com_err_hook();
@@ -2150,6 +2377,140 @@ errout:
 	return retval;
 }
 
+static errcode_t move_inode_tables(ext2_resize_t rfs)
+{
+	dgrp_t g, end_g, group_count;
+	dgrp_t move_start, move_count;
+	__u32 old_ipg = rfs->old_fs->super->s_inodes_per_group;
+	__u32 new_ipg = rfs->new_fs->super->s_inodes_per_group;
+	__u32 old_ibg = rfs->old_fs->inode_blocks_per_group;
+	__u32 new_ibg = rfs->new_fs->inode_blocks_per_group;
+	int retval;
+	blk64_t size, blk, ib;
+	int change_inodes = old_ibg != new_ibg;
+	__u32 unused, ino, old_ino, i;
+	ext2fs_block_bitmap meta_bmap = NULL;
+
+	retval = ext2fs_allocate_block_bitmap(rfs->new_fs, _("meta-data blocks"), &meta_bmap);
+	if (retval)
+		return retval;
+	retval = mark_table_blocks(rfs->new_fs, meta_bmap, 1);
+
+	printf("inode blocks per group: %u to %u\n", old_ibg, new_ibg);
+	size = old_ibg;
+	size = size < new_ibg ? size : new_ibg;
+	move_count = 0;
+	group_count = rfs->new_fs->group_desc_count;
+	group_count = group_count < rfs->old_fs->group_desc_count ? group_count : rfs->old_fs->group_desc_count;
+	for (g = 0; g < group_count; g++)
+	{
+		if (change_inodes)
+		{
+			/*
+			 * new_fs may have incorrect itable_unused because we're not adjusting it
+			 * before calling inode_alloc_stats2 in inodes_to_move().
+			 * and it's OK to take free_inodes_count from old_fs because any inodes
+			 * that are freed may only lay in shrinked inode table areas.
+			 */
+			unused = ext2fs_bg_itable_unused(rfs->old_fs, g);
+			if (new_ipg < old_ipg && unused < old_ipg-new_ipg)
+				unused = 0;
+			else
+				unused = unused + new_ipg - old_ipg;
+			ext2fs_bg_itable_unused_set(rfs->new_fs, g, unused);
+			ext2fs_bg_free_inodes_count_set(rfs->new_fs, g,
+				ext2fs_bg_free_inodes_count(rfs->old_fs, g) + new_ipg - old_ipg);
+			ext2fs_group_desc_csum_set(rfs->new_fs, g);
+		}
+		printf("g%u = [%u?] %u->%u free=%u->%u unused=%u->%u\n", g,
+			g > 0 ? ext2fs_inode_table_loc(rfs->old_fs, g-1)+old_ibg : 0,
+			ext2fs_inode_table_loc(rfs->old_fs, g),
+			ext2fs_inode_table_loc(rfs->new_fs, g),
+			ext2fs_bg_free_inodes_count(rfs->old_fs, g),
+			ext2fs_bg_free_inodes_count(rfs->new_fs, g),
+			ext2fs_bg_itable_unused(rfs->old_fs, g),
+			ext2fs_bg_itable_unused(rfs->new_fs, g));
+		if (change_inodes || ext2fs_inode_table_loc(rfs->new_fs, g) != ext2fs_inode_table_loc(rfs->old_fs, g))
+		{
+			move_count++;
+			if (move_count == 1)
+				move_start = g;
+			// check for overlap
+			if (g < rfs->new_fs->group_desc_count-1 &&
+				ext2fs_inode_table_loc(rfs->new_fs, g)+new_ibg > ext2fs_inode_table_loc(rfs->old_fs, g+1))
+			{
+				continue;
+			}
+		}
+		if (move_count > 0)
+		{
+			end_g = g;
+			for (i = 0, g = move_start+move_count-1; i < move_count; i++, g--)
+			{
+				if (!ext2fs_has_group_desc_csum(rfs->new_fs) ||
+					!ext2fs_bg_flags_test(rfs->new_fs, g, EXT2_BG_INODE_UNINIT))
+				{
+					retval = io_channel_read_blk64(rfs->new_fs->io, ext2fs_inode_table_loc(rfs->old_fs, g), size, rfs->itable_buf);
+					if (retval)
+						return retval;
+					retval = io_channel_write_blk64(rfs->new_fs->io, ext2fs_inode_table_loc(rfs->new_fs, g), size, rfs->itable_buf);
+					if (retval)
+						return retval;
+					if (new_ibg > old_ibg)
+					{
+						retval = ext2fs_zero_blocks2(rfs->new_fs,
+							ext2fs_inode_table_loc(rfs->new_fs, g)+old_ibg,
+							new_ibg-old_ibg, NULL, NULL);
+						if (retval)
+							return retval;
+					}
+				}
+				blk = ext2fs_inode_table_loc(rfs->old_fs, g);
+				for (ib = 0; ib < old_ibg; ib++)
+					if (!ext2fs_test_block_bitmap2(meta_bmap, blk+ib))
+						ext2fs_unmark_block_bitmap2(rfs->new_fs->block_map, blk+ib);
+				ext2fs_mark_block_bitmap_range2(rfs->new_fs->block_map, ext2fs_inode_table_loc(rfs->new_fs, g), new_ibg);
+			}
+			move_start = move_count = 0;
+			g = end_g;
+		}
+	}
+
+	if (old_ipg < new_ipg)
+	{
+		for (g = 0; g < group_count; g++)
+		{
+			for (i = 0, old_ino = 1 + old_ipg*g, ino = 1 + new_ipg*g; i < old_ipg; i++, ino++, old_ino++)
+			{
+				if (ext2fs_test_inode_bitmap2(rfs->old_fs->inode_map, old_ino))
+					ext2fs_mark_inode_bitmap2(rfs->new_fs->inode_map, ino);
+				else
+					ext2fs_unmark_inode_bitmap2(rfs->new_fs->inode_map, ino);
+			}
+			for (i = old_ipg, ino = 1 + new_ipg*g + old_ipg; i < new_ipg; i++, ino++)
+				ext2fs_unmark_inode_bitmap2(rfs->new_fs->inode_map, ino);
+		}
+	}
+	else if (old_ipg > new_ipg)
+	{
+		dgrp_t n;
+		for (n = 0, g = group_count-1; n < group_count; n++, g--)
+		{
+			for (i = 0, old_ino = 1 + old_ipg*g, ino = 1 + new_ipg*g; i < new_ipg; i++, ino++, old_ino++)
+			{
+				if (ext2fs_test_inode_bitmap2(rfs->old_fs->inode_map, old_ino))
+					ext2fs_mark_inode_bitmap2(rfs->new_fs->inode_map, ino);
+				else
+					ext2fs_unmark_inode_bitmap2(rfs->new_fs->inode_map, ino);
+			}
+		}
+	}
+
+	ext2fs_free_block_bitmap(meta_bmap);
+
+	return 0;
+}
+
 /* --------------------------------------------------------------------
  *
  * Resize processing, phase 4.
@@ -2176,9 +2537,10 @@ static int check_and_change_inodes(ext2_ino_t dir,
 	ext2_ino_t		new_inode;
 	errcode_t		retval;
 	int			ret = 0;
+	ext2_ino_t old_dir = TRANSLATE_IPG(dir, is->rfs->new_fs, is->rfs->old_fs);
 
 	if (is->rfs->progress && offset == 0) {
-		io_channel_flush(is->rfs->old_fs->io);
+		io_channel_flush(is->rfs->new_fs->io);
 		is->err = (is->rfs->progress)(is->rfs,
 					      E2_RSZ_INODE_REF_UPD_PASS,
 					      ++is->num, is->max_dirs);
@@ -2191,16 +2553,25 @@ static int check_and_change_inodes(ext2_ino_t dir,
 	 * old fs, then we must rewrite all dir blocks with new checksums.
 	 */
 	if (ext2fs_has_feature_metadata_csum(is->rfs->old_fs->super) &&
-	    !ext2fs_test_inode_bitmap2(is->rfs->old_fs->inode_map, dir))
+	    !ext2fs_test_inode_bitmap2(is->rfs->old_fs->inode_map, old_dir))
 		ret |= DIRENT_CHANGED;
 
 	if (!dirent->inode)
+	{
+		if (old_dir != dir)
+			ret |= DIRENT_CHANGED;
 		return ret;
+	}
 
-	new_inode = ext2fs_extent_translate(is->rfs->imap, dirent->inode);
-
+	new_inode = 0;
+	if (is->rfs->imap)
+		new_inode = ext2fs_extent_translate(is->rfs->imap, dirent->inode);
 	if (!new_inode)
+		new_inode = dirent->inode;
+	new_inode = TRANSLATE_IPG(new_inode, is->rfs->old_fs, is->rfs->new_fs);
+	if (new_inode == dirent->inode && old_dir == dir)
 		return ret;
+
 #ifdef RESIZE2FS_DEBUG
 	if (is->rfs->flags & RESIZE_DEBUG_INODEMAP)
 		printf("Inode translate (dir=%u, name=%.*s, %u->%u)\n",
@@ -2211,10 +2582,10 @@ static int check_and_change_inodes(ext2_ino_t dir,
 	dirent->inode = new_inode;
 
 	/* Update the directory mtime and ctime */
-	retval = ext2fs_read_inode(is->rfs->old_fs, dir, &inode);
+	retval = ext2fs_read_inode(is->rfs->new_fs, dir, &inode);
 	if (retval == 0) {
 		inode.i_mtime = inode.i_ctime = time(0);
-		is->err = ext2fs_write_inode(is->rfs->old_fs, dir, &inode);
+		is->err = ext2fs_write_inode(is->rfs->new_fs, dir, &inode);
 		if (is->err)
 			return ret | DIRENT_ABORT;
 	}
@@ -2226,8 +2597,9 @@ static errcode_t inode_ref_fix(ext2_resize_t rfs)
 {
 	errcode_t		retval;
 	struct istruct 		is;
+	int change_inodes = rfs->old_fs->inode_blocks_per_group != rfs->new_fs->inode_blocks_per_group;
 
-	if (!rfs->imap)
+	if (!change_inodes && !rfs->imap)
 		return 0;
 
 	/*
@@ -2235,7 +2607,7 @@ static errcode_t inode_ref_fix(ext2_resize_t rfs)
 	 * inode references
 	 */
 	is.num = 0;
-	is.max_dirs = ext2fs_dblist_count2(rfs->old_fs->dblist);
+	is.max_dirs = ext2fs_dblist_count2(rfs->new_fs->dblist);
 	is.rfs = rfs;
 	is.err = 0;
 
@@ -2246,11 +2618,11 @@ static errcode_t inode_ref_fix(ext2_resize_t rfs)
 			goto errout;
 	}
 
-	rfs->old_fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
-	retval = ext2fs_dblist_dir_iterate(rfs->old_fs->dblist,
+	rfs->new_fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
+	retval = ext2fs_dblist_dir_iterate(rfs->new_fs->dblist,
 					   DIRENT_FLAG_INCLUDE_EMPTY, 0,
 					   check_and_change_inodes, &is);
-	rfs->old_fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
+	rfs->new_fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
 	if (retval)
 		goto errout;
 	if (is.err) {
@@ -2263,7 +2635,8 @@ static errcode_t inode_ref_fix(ext2_resize_t rfs)
 				is.max_dirs, is.max_dirs);
 
 errout:
-	ext2fs_free_extent_table(rfs->imap);
+	if (rfs->imap)
+		ext2fs_free_extent_table(rfs->imap);
 	rfs->imap = 0;
 	return retval;
 }
@@ -2319,7 +2692,7 @@ static errcode_t move_itables(ext2_resize_t rfs)
 		if (retval)
 			return retval;
 
-		retval = mark_table_blocks(fs, new_bmap);
+		retval = mark_table_blocks(fs, new_bmap, 0);
 		if (retval)
 			goto errout;
 	}
@@ -2431,7 +2804,7 @@ static errcode_t move_itables(ext2_resize_t rfs)
 				goto errout;
 		}
 	}
-	mark_table_blocks(fs, fs->block_map);
+	mark_table_blocks(fs, fs->block_map, 0);
 	ext2fs_flush(fs);
 #ifdef RESIZE2FS_DEBUG
 	if (rfs->flags & RESIZE_DEBUG_ITABLEMOVE)

resize/resize2fs.h

@@ -141,7 +141,7 @@ struct ext2_resize_struct {
 
 
 /* prototypes */
-extern errcode_t resize_fs(ext2_filsys fs, blk64_t *new_size, int flags,
+extern errcode_t resize_fs(ext2_filsys fs, blk64_t *new_size, __u32 new_inodes, int flags,
 			   errcode_t	(*progress)(ext2_resize_t rfs,
 					    int pass, unsigned long cur,
 					    unsigned long max));