Adding upstream version 1.47.0.upstream/1.47.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 3769 insertions, 0 deletions

diff --git a/misc/tune2fs.c b/misc/tune2fs.c
new file mode 100644
index 0000000..458f7cf
--- /dev/null
+++ b/misc/tune2fs.c
@@ -0,0 +1,3769 @@
+/*
+ * tune2fs.c - Change the file system parameters on an ext2 file system
+ *
+ * Copyright (C) 1992, 1993, 1994  Remy Card <card@masi.ibp.fr>
+ *                                 Laboratoire MASI, Institut Blaise Pascal
+ *                                 Universite Pierre et Marie Curie (Paris VI)
+ *
+ * Copyright 1995, 1996, 1997, 1998, 1999, 2000 by Theodore Ts'o.
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Public
+ * License.
+ * %End-Header%
+ */
+
+/*
+ * History:
+ * 93/06/01	- Creation
+ * 93/10/31	- Added the -c option to change the maximal mount counts
+ * 93/12/14	- Added -l flag to list contents of superblock
+ *                M.J.E. Mol (marcel@duteca.et.tudelft.nl)
+ *                F.W. ten Wolde (franky@duteca.et.tudelft.nl)
+ * 93/12/29	- Added the -e option to change errors behavior
+ * 94/02/27	- Ported to use the ext2fs library
+ * 94/03/06	- Added the checks interval from Uwe Ohse (uwe@tirka.gun.de)
+ */
+
+#define _XOPEN_SOURCE 600 /* for inclusion of strptime() */
+#include "config.h"
+#include <fcntl.h>
+#include <grp.h>
+#ifdef HAVE_GETOPT_H
+#include <getopt.h>
+#else
+extern char *optarg;
+extern int optind;
+#endif
+#include <pwd.h>
+#include <stdio.h>
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#ifdef HAVE_STRINGS_H
+#include <strings.h>	/* for strcasecmp() */
+#else
+#define _BSD_SOURCE	/* for inclusion of strcasecmp() via <string.h> */
+#define _DEFAULT_SOURCE	  /* since glibc 2.20 _BSD_SOURCE is deprecated */
+#endif
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <libgen.h>
+#include <limits.h>
+#ifdef HAVE_SYS_IOCTL_H
+#include <sys/ioctl.h>
+#endif
+
+#include "ext2fs/ext2_fs.h"
+#include "ext2fs/ext2fs.h"
+#include "ext2fs/kernel-jbd.h"
+#include "et/com_err.h"
+#include "support/plausible.h"
+#include "support/quotaio.h"
+#include "support/devname.h"
+#include "uuid/uuid.h"
+#include "e2p/e2p.h"
+#include "util.h"
+#include "blkid/blkid.h"
+
+#include "../version.h"
+#include "support/nls-enable.h"
+
+#define QOPT_ENABLE	(1)
+#define QOPT_DISABLE	(-1)
+
+#ifndef FS_IOC_SETFSLABEL
+#define FSLABEL_MAX 256
+#define FS_IOC_SETFSLABEL	_IOW(0x94, 50, char[FSLABEL_MAX])
+#endif
+
+#ifndef FS_IOC_GETFSLABEL
+#define FS_IOC_GETFSLABEL	_IOR(0x94, 49, char[FSLABEL_MAX])
+#endif
+
+struct fsuuid {
+	__u32   fsu_len;
+	__u32   fsu_flags;
+	__u8    fsu_uuid[];
+};
+
+#ifndef EXT4_IOC_GETFSUUID
+#define EXT4_IOC_GETFSUUID	_IOR('f', 44, struct fsuuid)
+#endif
+
+#ifndef EXT4_IOC_SETFSUUID
+#define EXT4_IOC_SETFSUUID	_IOW('f', 44, struct fsuuid)
+#endif
+
+extern int ask_yn(const char *string, int def);
+
+const char *program_name = "tune2fs";
+char *device_name;
+char *new_label, *new_last_mounted, *requested_uuid;
+char *io_options;
+static int c_flag, C_flag, e_flag, f_flag, g_flag, i_flag, l_flag, L_flag;
+static int m_flag, M_flag, Q_flag, r_flag, s_flag = -1, u_flag, U_flag, T_flag;
+static int I_flag;
+static int clear_mmp;
+static time_t last_check_time;
+static int print_label;
+static int max_mount_count, mount_count, mount_flags;
+static unsigned long interval;
+static blk64_t reserved_blocks;
+static double reserved_ratio;
+static unsigned long resgid, resuid;
+static unsigned short errors;
+static int open_flag;
+static char *features_cmd;
+static char *mntopts_cmd;
+static int stride, stripe_width;
+static int stride_set, stripe_width_set;
+static char *extended_cmd;
+static unsigned long new_inode_size;
+static char *ext_mount_opts;
+static int quota_enable[MAXQUOTAS];
+static int rewrite_checksums;
+static int feature_64bit;
+static int fsck_requested;
+static char *undo_file;
+int enabling_casefold;
+
+int journal_size, journal_fc_size, journal_flags;
+char *journal_device;
+static blk64_t journal_location = ~0LL;
+static e2_blkcnt_t orphan_file_blocks;
+
+static struct list_head blk_move_list;
+
+struct blk_move {
+	struct list_head list;
+	blk64_t old_loc;
+	blk64_t new_loc;
+};
+
+errcode_t ext2fs_run_ext3_journal(ext2_filsys *fs);
+
+static const char *fsck_explain = N_("\nThis operation requires a freshly checked filesystem.\n");
+
+static const char *please_fsck = N_("Please run e2fsck -f on the filesystem.\n");
+static const char *please_dir_fsck =
+		N_("Please run e2fsck -fD on the filesystem.\n");
+
+#ifdef CONFIG_BUILD_FINDFS
+void do_findfs(int argc, char **argv);
+#endif
+
+#ifdef CONFIG_JBD_DEBUG		/* Enabled by configure --enable-jbd-debug */
+int journal_enable_debug = -1;
+#endif
+
+static void usage(void)
+{
+	fprintf(stderr,
+		_("Usage: %s [-c max_mounts_count] [-e errors_behavior] [-f] "
+		  "[-g group]\n"
+		  "\t[-i interval[d|m|w]] [-j] [-J journal_options] [-l]\n"
+		  "\t[-m reserved_blocks_percent] [-o [^]mount_options[,...]]\n"
+		  "\t[-r reserved_blocks_count] [-u user] [-C mount_count]\n"
+		  "\t[-L volume_label] [-M last_mounted_dir]\n"
+		  "\t[-O [^]feature[,...]] [-Q quota_options]\n"
+		  "\t[-E extended-option[,...]] [-T last_check_time] "
+		  "[-U UUID]\n\t[-I new_inode_size] [-z undo_file] device\n"),
+		program_name);
+	exit(1);
+}
+
+static __u32 ok_features[3] = {
+	/* Compat */
+	EXT3_FEATURE_COMPAT_HAS_JOURNAL |
+		EXT2_FEATURE_COMPAT_DIR_INDEX |
+		EXT4_FEATURE_COMPAT_FAST_COMMIT |
+		EXT4_FEATURE_COMPAT_STABLE_INODES |
+		EXT4_FEATURE_COMPAT_ORPHAN_FILE,
+	/* Incompat */
+	EXT2_FEATURE_INCOMPAT_FILETYPE |
+		EXT3_FEATURE_INCOMPAT_EXTENTS |
+		EXT4_FEATURE_INCOMPAT_FLEX_BG |
+		EXT4_FEATURE_INCOMPAT_EA_INODE|
+		EXT4_FEATURE_INCOMPAT_MMP |
+		EXT4_FEATURE_INCOMPAT_64BIT |
+		EXT4_FEATURE_INCOMPAT_ENCRYPT |
+		EXT4_FEATURE_INCOMPAT_CSUM_SEED |
+		EXT4_FEATURE_INCOMPAT_LARGEDIR |
+		EXT4_FEATURE_INCOMPAT_CASEFOLD,
+	/* R/O compat */
+	EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
+		EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
+		EXT4_FEATURE_RO_COMPAT_DIR_NLINK|
+		EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|
+		EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
+		EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER |
+		EXT4_FEATURE_RO_COMPAT_QUOTA |
+		EXT4_FEATURE_RO_COMPAT_METADATA_CSUM |
+		EXT4_FEATURE_RO_COMPAT_READONLY |
+		EXT4_FEATURE_RO_COMPAT_PROJECT |
+		EXT4_FEATURE_RO_COMPAT_VERITY
+};
+
+static __u32 clear_ok_features[3] = {
+	/* Compat */
+	EXT3_FEATURE_COMPAT_HAS_JOURNAL |
+		EXT2_FEATURE_COMPAT_RESIZE_INODE |
+		EXT2_FEATURE_COMPAT_DIR_INDEX |
+		EXT4_FEATURE_COMPAT_FAST_COMMIT |
+		EXT4_FEATURE_COMPAT_ORPHAN_FILE,
+	/* Incompat */
+	EXT2_FEATURE_INCOMPAT_FILETYPE |
+		EXT4_FEATURE_INCOMPAT_FLEX_BG |
+		EXT4_FEATURE_INCOMPAT_MMP |
+		EXT4_FEATURE_INCOMPAT_64BIT |
+		EXT4_FEATURE_INCOMPAT_CSUM_SEED |
+		EXT4_FEATURE_INCOMPAT_CASEFOLD,
+	/* R/O compat */
+	EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
+		EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
+		EXT4_FEATURE_RO_COMPAT_DIR_NLINK|
+		EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|
+		EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
+		EXT4_FEATURE_RO_COMPAT_QUOTA |
+		EXT4_FEATURE_RO_COMPAT_PROJECT |
+		EXT4_FEATURE_RO_COMPAT_METADATA_CSUM |
+		EXT4_FEATURE_RO_COMPAT_READONLY
+};
+
+/**
+ * Try to get journal super block if any
+ */
+static int get_journal_sb(ext2_filsys jfs, char buf[SUPERBLOCK_SIZE])
+{
+	int retval;
+	journal_superblock_t *jsb;
+
+	if (!ext2fs_has_feature_journal_dev(jfs->super)) {
+		return EXT2_ET_UNSUPP_FEATURE;
+	}
+
+	/* Get the journal superblock */
+	if ((retval = io_channel_read_blk64(jfs->io,
+	    ext2fs_journal_sb_start(jfs->blocksize), -SUPERBLOCK_SIZE, buf))) {
+		com_err(program_name, retval, "%s",
+		_("while reading journal superblock"));
+		return retval;
+	}
+
+	jsb = (journal_superblock_t *) buf;
+	if ((jsb->s_header.h_magic != (unsigned)ntohl(JBD2_MAGIC_NUMBER)) ||
+	    (jsb->s_header.h_blocktype != (unsigned)ntohl(JBD2_SUPERBLOCK_V2))) {
+		fputs(_("Journal superblock not found!\n"), stderr);
+		return EXT2_ET_BAD_MAGIC;
+	}
+
+	return 0;
+}
+
+static __u8 *journal_user(__u8 uuid[UUID_SIZE], __u8 s_users[JBD2_USERS_SIZE],
+			  int nr_users)
+{
+	int i;
+	for (i = 0; i < nr_users; i++) {
+		if (memcmp(uuid, &s_users[i * UUID_SIZE], UUID_SIZE) == 0)
+			return &s_users[i * UUID_SIZE];
+	}
+
+	return NULL;
+}
+
+/*
+ * Remove an external journal from the filesystem
+ */
+static int remove_journal_device(ext2_filsys fs)
+{
+	char		*journal_path;
+	ext2_filsys	jfs;
+	char		buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
+	journal_superblock_t	*jsb;
+	int		i, nr_users;
+	errcode_t	retval;
+	int		commit_remove_journal = 0;
+	io_manager	io_ptr;
+
+	if (f_flag)
+		commit_remove_journal = 1; /* force removal even if error */
+
+	uuid_unparse(fs->super->s_journal_uuid, buf);
+	journal_path = blkid_get_devname(NULL, "UUID", buf);
+
+	if (!journal_path) {
+		journal_path =
+			ext2fs_find_block_device(fs->super->s_journal_dev);
+		if (!journal_path)
+			goto no_valid_journal;
+	}
+
+#ifdef CONFIG_TESTIO_DEBUG
+	if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
+		io_ptr = test_io_manager;
+		test_io_backing_manager = unix_io_manager;
+	} else
+#endif
+		io_ptr = unix_io_manager;
+	retval = ext2fs_open(journal_path, EXT2_FLAG_RW|
+			     EXT2_FLAG_JOURNAL_DEV_OK, 0,
+			     fs->blocksize, io_ptr, &jfs);
+	if (retval) {
+		com_err(program_name, retval, "%s",
+			_("while trying to open external journal"));
+		goto no_valid_journal;
+	}
+
+	if ((retval = get_journal_sb(jfs, buf))) {
+		if (retval == EXT2_ET_UNSUPP_FEATURE)
+			fprintf(stderr, _("%s is not a journal device.\n"),
+				journal_path);
+		goto no_valid_journal;
+	}
+
+	jsb = (journal_superblock_t *) buf;
+	/* Find the filesystem UUID */
+	nr_users = ntohl(jsb->s_nr_users);
+	if (nr_users > JBD2_USERS_MAX) {
+		fprintf(stderr, _("Journal superblock is corrupted, nr_users\n"
+				 "is too high (%d).\n"), nr_users);
+		commit_remove_journal = 1;
+		goto no_valid_journal;
+	}
+
+	if (!journal_user(fs->super->s_uuid, jsb->s_users, nr_users)) {
+		fputs(_("Filesystem's UUID not found on journal device.\n"),
+		      stderr);
+		commit_remove_journal = 1;
+		goto no_valid_journal;
+	}
+	nr_users--;
+	for (i = 0; i < nr_users; i++)
+		memcpy(&jsb->s_users[i * 16], &jsb->s_users[(i + 1) * 16], 16);
+	jsb->s_nr_users = htonl(nr_users);
+
+	/* Write back the journal superblock */
+	retval = io_channel_write_blk64(jfs->io,
+					ext2fs_journal_sb_start(fs->blocksize),
+					-SUPERBLOCK_SIZE, buf);
+	if (retval) {
+		com_err(program_name, retval,
+			"while writing journal superblock.");
+		goto no_valid_journal;
+	}
+
+	commit_remove_journal = 1;
+
+no_valid_journal:
+	if (commit_remove_journal == 0) {
+		fputs(_("Cannot locate journal device. It was NOT removed\n"
+			"Use -f option to remove missing journal device.\n"),
+		      stderr);
+		return 1;
+	}
+	fs->super->s_journal_dev = 0;
+	memset(fs->super->s_jnl_blocks, 0, sizeof(fs->super->s_jnl_blocks));
+	uuid_clear(fs->super->s_journal_uuid);
+	ext2fs_mark_super_dirty(fs);
+	fputs(_("Journal removed\n"), stdout);
+	free(journal_path);
+
+	return 0;
+}
+
+/* Helper function for remove_journal_inode */
+static int release_blocks_proc(ext2_filsys fs, blk64_t *blocknr,
+			       e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
+			       blk64_t ref_block EXT2FS_ATTR((unused)),
+			       int ref_offset EXT2FS_ATTR((unused)),
+			       void *private EXT2FS_ATTR((unused)))
+{
+	blk64_t	block;
+	int	group;
+
+	block = *blocknr;
+	ext2fs_unmark_block_bitmap2(fs->block_map, block);
+	group = ext2fs_group_of_blk2(fs, block);
+	ext2fs_bg_free_blocks_count_set(fs, group, ext2fs_bg_free_blocks_count(fs, group) + 1);
+	ext2fs_group_desc_csum_set(fs, group);
+	ext2fs_free_blocks_count_add(fs->super, EXT2FS_CLUSTER_RATIO(fs));
+	return 0;
+}
+
+/*
+ * Remove the journal inode from the filesystem
+ */
+static errcode_t remove_journal_inode(ext2_filsys fs)
+{
+	struct ext2_inode	inode;
+	errcode_t		retval;
+	ext2_ino_t		ino = fs->super->s_journal_inum;
+
+	retval = ext2fs_read_inode(fs, ino,  &inode);
+	if (retval) {
+		com_err(program_name, retval, "%s",
+			_("while reading journal inode"));
+		return retval;
+	}
+	if (ino == EXT2_JOURNAL_INO) {
+		retval = ext2fs_read_bitmaps(fs);
+		if (retval) {
+			com_err(program_name, retval, "%s",
+				_("while reading bitmaps"));
+			return retval;
+		}
+		retval = ext2fs_block_iterate3(fs, ino,
+					       BLOCK_FLAG_READ_ONLY, NULL,
+					       release_blocks_proc, NULL);
+		if (retval) {
+			com_err(program_name, retval, "%s",
+				_("while clearing journal inode"));
+			return retval;
+		}
+		fs->super->s_overhead_clusters -=
+			EXT2FS_NUM_B2C(fs, EXT2_I_SIZE(&inode) / fs->blocksize);
+		memset(&inode, 0, sizeof(inode));
+		ext2fs_mark_bb_dirty(fs);
+		fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
+	} else
+		inode.i_flags &= ~EXT2_IMMUTABLE_FL;
+	retval = ext2fs_write_inode(fs, ino, &inode);
+	if (retval) {
+		com_err(program_name, retval, "%s",
+			_("while writing journal inode"));
+		return retval;
+	}
+	fs->super->s_journal_inum = 0;
+	memset(fs->super->s_jnl_blocks, 0, sizeof(fs->super->s_jnl_blocks));
+	ext2fs_mark_super_dirty(fs);
+
+	return 0;
+}
+
+/*
+ * Update the default mount options
+ */
+static int update_mntopts(ext2_filsys fs, char *mntopts)
+{
+	struct ext2_super_block *sb = fs->super;
+
+	if (e2p_edit_mntopts(mntopts, &sb->s_default_mount_opts, ~0)) {
+		fprintf(stderr, _("Invalid mount option set: %s\n"),
+			mntopts);
+		return 1;
+	}
+	ext2fs_mark_super_dirty(fs);
+
+	return 0;
+}
+
+static int check_fsck_needed(ext2_filsys fs, const char *prompt)
+{
+	/* Refuse to modify anything but a freshly checked valid filesystem. */
+	if (!(fs->super->s_state & EXT2_VALID_FS) ||
+	    (fs->super->s_state & EXT2_ERROR_FS) ||
+	    (fs->super->s_lastcheck < fs->super->s_mtime)) {
+		puts(_(fsck_explain));
+		puts(_(please_fsck));
+		if (mount_flags & EXT2_MF_READONLY)
+			printf("%s", _("(and reboot afterwards!)\n"));
+		return 1;
+	}
+
+	/* Give the admin a few seconds to bail out of a dangerous op. */
+	if (!getenv("TUNE2FS_FORCE_PROMPT") && (!isatty(0) || !isatty(1)))
+		return 0;
+
+	puts(prompt);
+	proceed_question(5);
+
+	return 0;
+}
+
+static void request_dir_fsck_afterwards(ext2_filsys fs)
+{
+	static int requested;
+
+	if (requested++)
+		return;
+	fsck_requested++;
+	fs->super->s_state &= ~EXT2_VALID_FS;
+	puts(_(fsck_explain));
+	puts(_(please_dir_fsck));
+	if (mount_flags & EXT2_MF_READONLY)
+		printf("%s", _("(and reboot afterwards!)\n"));
+}
+
+static void request_fsck_afterwards(ext2_filsys fs)
+{
+	static int requested = 0;
+
+	if (requested++)
+		return;
+	fsck_requested++;
+	fs->super->s_state &= ~EXT2_VALID_FS;
+	printf("\n%s\n", _(please_fsck));
+	if (mount_flags & EXT2_MF_READONLY)
+		printf("%s", _("(and reboot afterwards!)\n"));
+}
+
+static void convert_64bit(ext2_filsys fs, int direction)
+{
+	/*
+	 * Is resize2fs going to demand a fsck run? Might as well tell the
+	 * user now.
+	 */
+	if (!fsck_requested &&
+	    ((fs->super->s_state & EXT2_ERROR_FS) ||
+	     !(fs->super->s_state & EXT2_VALID_FS) ||
+	     fs->super->s_lastcheck < fs->super->s_mtime))
+		request_fsck_afterwards(fs);
+	if (fsck_requested)
+		fprintf(stderr, _("After running e2fsck, please run `resize2fs %s %s"),
+			direction > 0 ? "-b" : "-s", fs->device_name);
+	else
+		fprintf(stderr, _("Please run `resize2fs %s %s"),
+			direction > 0 ? "-b" : "-s", fs->device_name);
+
+	if (undo_file)
+		fprintf(stderr, _(" -z \"%s\""), undo_file);
+	if (direction > 0)
+		fprintf(stderr, _("' to enable 64-bit mode.\n"));
+	else
+		fprintf(stderr, _("' to disable 64-bit mode.\n"));
+}
+
+/*
+ * Rewrite directory blocks with checksums
+ */
+struct rewrite_dir_context {
+	char *buf;
+	errcode_t errcode;
+	ext2_ino_t dir;
+	int is_htree:1;
+	int clear_htree:1;
+};
+
+static int rewrite_dir_block(ext2_filsys fs,
+			     blk64_t	*blocknr,
+			     e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
+			     blk64_t	ref_block EXT2FS_ATTR((unused)),
+			     int	ref_offset EXT2FS_ATTR((unused)),
+			     void	*priv_data)
+{
+	struct ext2_dx_countlimit *dcl = NULL;
+	struct rewrite_dir_context *ctx = priv_data;
+	int dcl_offset, changed = 0;
+
+	ctx->errcode = ext2fs_read_dir_block4(fs, *blocknr, ctx->buf, 0,
+					      ctx->dir);
+	if (ctx->errcode)
+		return BLOCK_ABORT;
+
+	/*
+	 * if htree node... Note that if we are clearing htree structures from
+	 * the directory, we treat the htree internal block as an ordinary leaf.
+	 * The code below will do the right thing and make space for checksum
+	 * there.
+	 */
+	if (ctx->is_htree && !ctx->clear_htree)
+		ext2fs_get_dx_countlimit(fs, (struct ext2_dir_entry *)ctx->buf,
+					 &dcl, &dcl_offset);
+	if (dcl) {
+		if (!ext2fs_has_feature_metadata_csum(fs->super)) {
+			/* Ensure limit is the max size */
+			int max_entries = (fs->blocksize - dcl_offset) /
+					  sizeof(struct ext2_dx_entry);
+			if (ext2fs_le16_to_cpu(dcl->limit) != max_entries) {
+				changed = 1;
+				dcl->limit = ext2fs_cpu_to_le16(max_entries);
+			}
+		} else {
+			/* If htree block is full then rebuild the dir */
+			if (ext2fs_le16_to_cpu(dcl->count) ==
+			    ext2fs_le16_to_cpu(dcl->limit)) {
+				request_dir_fsck_afterwards(fs);
+				return 0;
+			}
+			/*
+			 * Ensure dcl->limit is small enough to leave room for
+			 * the checksum tail.
+			 */
+			int max_entries = (fs->blocksize - (dcl_offset +
+						sizeof(struct ext2_dx_tail))) /
+					  sizeof(struct ext2_dx_entry);
+			if (ext2fs_le16_to_cpu(dcl->limit) != max_entries)
+				dcl->limit = ext2fs_cpu_to_le16(max_entries);
+			/* Always rewrite checksum */
+			changed = 1;
+		}
+	} else {
+		unsigned int rec_len, name_size;
+		char *top = ctx->buf + fs->blocksize;
+		struct ext2_dir_entry *de = (struct ext2_dir_entry *)ctx->buf;
+		struct ext2_dir_entry *last_de = NULL, *penultimate_de = NULL;
+
+		/* Find last and penultimate dirent */
+		while ((char *)de < top) {
+			penultimate_de = last_de;
+			last_de = de;
+			ctx->errcode = ext2fs_get_rec_len(fs, de, &rec_len);
+			if (!ctx->errcode && !rec_len)
+				ctx->errcode = EXT2_ET_DIR_CORRUPTED;
+			if (ctx->errcode)
+				return BLOCK_ABORT;
+			de = (struct ext2_dir_entry *)(((char *)de) + rec_len);
+		}
+		ctx->errcode = ext2fs_get_rec_len(fs, last_de, &rec_len);
+		if (ctx->errcode)
+			return BLOCK_ABORT;
+		name_size = ext2fs_dirent_name_len(last_de);
+
+		if (!ext2fs_has_feature_metadata_csum(fs->super)) {
+			if (!penultimate_de)
+				return 0;
+			if (last_de->inode ||
+			    name_size ||
+			    rec_len != sizeof(struct ext2_dir_entry_tail))
+				return 0;
+			/*
+			 * The last dirent is unused and the right length to
+			 * have stored a checksum.  Erase it.
+			 */
+			ctx->errcode = ext2fs_get_rec_len(fs, penultimate_de,
+							  &rec_len);
+			if (!rec_len)
+				ctx->errcode = EXT2_ET_DIR_CORRUPTED;
+			if (ctx->errcode)
+				return BLOCK_ABORT;
+			ext2fs_set_rec_len(fs, rec_len +
+					sizeof(struct ext2_dir_entry_tail),
+					penultimate_de);
+			changed = 1;
+		} else {
+			unsigned csum_size = sizeof(struct ext2_dir_entry_tail);
+			struct ext2_dir_entry_tail *t;
+
+			/*
+			 * If the last dirent looks like the tail, just update
+			 * the checksum.
+			 */
+			if (!last_de->inode &&
+			    rec_len == csum_size) {
+				t = (struct ext2_dir_entry_tail *)last_de;
+				t->det_reserved_name_len =
+						EXT2_DIR_NAME_LEN_CSUM;
+				changed = 1;
+				goto out;
+			}
+			if (name_size & 3)
+				name_size = (name_size & ~3) + 4;
+			/* If there's not enough space for the tail, e2fsck */
+			if (rec_len <= (8 + name_size + csum_size)) {
+				request_dir_fsck_afterwards(fs);
+				return 0;
+			}
+			/* Shorten that last de and insert the tail */
+			ext2fs_set_rec_len(fs, rec_len - csum_size, last_de);
+			t = EXT2_DIRENT_TAIL(ctx->buf, fs->blocksize);
+			ext2fs_initialize_dirent_tail(fs, t);
+
+			/* Always update checksum */
+			changed = 1;
+		}
+	}
+
+out:
+	if (!changed)
+		return 0;
+
+	ctx->errcode = ext2fs_write_dir_block4(fs, *blocknr, ctx->buf,
+					       0, ctx->dir);
+	if (ctx->errcode)
+		return BLOCK_ABORT;
+
+	return 0;
+}
+
+static errcode_t rewrite_directory(ext2_filsys fs, ext2_ino_t dir,
+				   struct ext2_inode *inode)
+{
+	errcode_t	retval;
+	struct rewrite_dir_context ctx;
+
+	retval = ext2fs_get_mem(fs->blocksize, &ctx.buf);
+	if (retval)
+		return retval;
+
+	ctx.is_htree = !!(inode->i_flags & EXT2_INDEX_FL);
+	ctx.clear_htree = !ext2fs_has_feature_dir_index(fs->super);
+	ctx.dir = dir;
+	ctx.errcode = 0;
+	retval = ext2fs_block_iterate3(fs, dir, BLOCK_FLAG_READ_ONLY |
+						BLOCK_FLAG_DATA_ONLY,
+				       0, rewrite_dir_block, &ctx);
+
+	ext2fs_free_mem(&ctx.buf);
+	if (retval)
+		return retval;
+
+	if (ctx.is_htree && ctx.clear_htree) {
+		inode->i_flags &= ~EXT2_INDEX_FL;
+		retval = ext2fs_write_inode(fs, dir, inode);
+		if (retval)
+			return retval;
+	}
+
+	return ctx.errcode;
+}
+
+/*
+ * Context information that does not change across rewrite_one_inode()
+ * invocations.
+ */
+struct rewrite_context {
+	ext2_filsys fs;
+	struct ext2_inode *zero_inode;
+	char *ea_buf;
+	int inode_size;
+};
+
+#define fatal_err(code, args...)		\
+	do {					\
+		com_err(__func__, code, args);	\
+		exit(1);			\
+	} while (0);
+
+static void update_ea_inode_hash(struct rewrite_context *ctx, ext2_ino_t ino,
+				 struct ext2_inode *inode)
+{
+	errcode_t retval;
+	ext2_file_t file;
+	__u32 hash;
+
+	retval = ext2fs_file_open(ctx->fs, ino, 0, &file);
+	if (retval)
+		fatal_err(retval, "open ea_inode");
+	retval = ext2fs_file_read(file, ctx->ea_buf, inode->i_size,
+				  NULL);
+	if (retval)
+		fatal_err(retval, "read ea_inode");
+	retval = ext2fs_file_close(file);
+	if (retval)
+		fatal_err(retval, "close ea_inode");
+
+	hash = ext2fs_crc32c_le(ctx->fs->csum_seed,
+				(unsigned char *) ctx->ea_buf, inode->i_size);
+	ext2fs_set_ea_inode_hash(inode, hash);
+}
+
+static int update_xattr_entry_hashes(ext2_filsys fs,
+				     struct ext2_ext_attr_entry *entry,
+				     struct ext2_ext_attr_entry *end)
+{
+	int modified = 0;
+	errcode_t retval;
+
+	while (entry < end && !EXT2_EXT_IS_LAST_ENTRY(entry)) {
+		if (entry->e_value_inum) {
+			retval = ext2fs_ext_attr_hash_entry2(fs, entry, NULL,
+							     &entry->e_hash);
+			if (retval)
+				fatal_err(retval, "hash ea_inode entry");
+			modified = 1;
+		}
+		entry = EXT2_EXT_ATTR_NEXT(entry);
+	}
+	return modified;
+}
+
+static void update_inline_xattr_hashes(struct rewrite_context *ctx,
+				       struct ext2_inode_large *inode)
+{
+	struct ext2_ext_attr_entry *start, *end;
+	__u32 *ea_magic;
+
+	if (inode->i_extra_isize == 0)
+		return;
+
+	if (inode->i_extra_isize & 3 ||
+	    inode->i_extra_isize > ctx->inode_size - EXT2_GOOD_OLD_INODE_SIZE)
+		fatal_err(EXT2_ET_INODE_CORRUPTED, "bad i_extra_isize")
+
+	ea_magic = (__u32 *)((char *)inode + EXT2_GOOD_OLD_INODE_SIZE +
+				inode->i_extra_isize);
+	if (*ea_magic != EXT2_EXT_ATTR_MAGIC)
+		return;
+
+	start = (struct ext2_ext_attr_entry *)(ea_magic + 1);
+	end = (struct ext2_ext_attr_entry *)((char *)inode + ctx->inode_size);
+
+	update_xattr_entry_hashes(ctx->fs, start, end);
+}
+
+static void update_block_xattr_hashes(struct rewrite_context *ctx,
+				      char *block_buf)
+{
+	struct ext2_ext_attr_header *header;
+	struct ext2_ext_attr_entry *start, *end;
+
+	header = (struct ext2_ext_attr_header *)block_buf;
+	if (header->h_magic != EXT2_EXT_ATTR_MAGIC)
+		return;
+
+	start = (struct ext2_ext_attr_entry *)(header+1);
+	end = (struct ext2_ext_attr_entry *)(block_buf + ctx->fs->blocksize);
+
+	if (update_xattr_entry_hashes(ctx->fs, start, end))
+		ext2fs_ext_attr_block_rehash(header, end);
+}
+
+static void rewrite_one_inode(struct rewrite_context *ctx, ext2_ino_t ino,
+			      struct ext2_inode *inode)
+{
+	blk64_t file_acl_block;
+	errcode_t retval;
+
+	if (!ext2fs_test_inode_bitmap2(ctx->fs->inode_map, ino)) {
+		if (!memcmp(inode, ctx->zero_inode, ctx->inode_size))
+			return;
+		memset(inode, 0, ctx->inode_size);
+	}
+
+	if (inode->i_flags & EXT4_EA_INODE_FL)
+		update_ea_inode_hash(ctx, ino, inode);
+
+	if (ctx->inode_size != EXT2_GOOD_OLD_INODE_SIZE)
+		update_inline_xattr_hashes(ctx,
+					   (struct ext2_inode_large *)inode);
+
+	retval = ext2fs_write_inode_full(ctx->fs, ino, inode, ctx->inode_size);
+	if (retval)
+		fatal_err(retval, "while writing inode");
+
+	retval = ext2fs_fix_extents_checksums(ctx->fs, ino, inode);
+	if (retval)
+		fatal_err(retval, "while rewriting extents");
+
+	if (LINUX_S_ISDIR(inode->i_mode) &&
+	    ext2fs_inode_has_valid_blocks2(ctx->fs, inode)) {
+		retval = rewrite_directory(ctx->fs, ino, inode);
+		if (retval)
+			fatal_err(retval, "while rewriting directories");
+	}
+
+	file_acl_block = ext2fs_file_acl_block(ctx->fs, inode);
+	if (!file_acl_block)
+		return;
+
+	retval = ext2fs_read_ext_attr3(ctx->fs, file_acl_block, ctx->ea_buf,
+				       ino);
+	if (retval)
+		fatal_err(retval, "while rewriting extended attribute");
+
+	update_block_xattr_hashes(ctx, ctx->ea_buf);
+	retval = ext2fs_write_ext_attr3(ctx->fs, file_acl_block, ctx->ea_buf,
+					ino);
+	if (retval)
+		fatal_err(retval, "while rewriting extended attribute");
+}
+
+#define REWRITE_EA_FL		0x01	/* Rewrite EA inodes */
+#define REWRITE_DIR_FL		0x02	/* Rewrite directories */
+#define REWRITE_NONDIR_FL	0x04	/* Rewrite other inodes */
+#define REWRITE_ALL (REWRITE_EA_FL | REWRITE_DIR_FL | REWRITE_NONDIR_FL)
+
+static void rewrite_inodes_pass(struct rewrite_context *ctx, unsigned int flags)
+{
+	ext2_inode_scan	scan;
+	errcode_t	retval;
+	ext2_ino_t	ino;
+	struct ext2_inode *inode;
+	int rewrite;
+
+	retval = ext2fs_get_mem(ctx->inode_size, &inode);
+	if (retval)
+		fatal_err(retval, "while allocating memory");
+
+	retval = ext2fs_open_inode_scan(ctx->fs, 0, &scan);
+	if (retval)
+		fatal_err(retval, "while opening inode scan");
+
+	do {
+		retval = ext2fs_get_next_inode_full(scan, &ino, inode,
+						    ctx->inode_size);
+		if (retval)
+			fatal_err(retval, "while getting next inode");
+		if (!ino)
+			break;
+
+		rewrite = 0;
+		if (inode->i_flags & EXT4_EA_INODE_FL) {
+			if (flags & REWRITE_EA_FL)
+				rewrite = 1;
+		} else if (LINUX_S_ISDIR(inode->i_mode)) {
+			if (flags & REWRITE_DIR_FL)
+				rewrite = 1;
+		} else {
+			if (flags & REWRITE_NONDIR_FL)
+				rewrite = 1;
+		}
+		if (rewrite)
+			rewrite_one_inode(ctx, ino, inode);
+	} while (ino);
+	ext2fs_close_inode_scan(scan);
+	ext2fs_free_mem(&inode);
+}
+
+/*
+ * Forcibly rewrite checksums in inodes specified by 'flags'
+ */
+static void rewrite_inodes(ext2_filsys fs, unsigned int flags)
+{
+	struct rewrite_context ctx = {
+		.fs = fs,
+		.inode_size = EXT2_INODE_SIZE(fs->super),
+	};
+	errcode_t retval;
+
+	if (fs->super->s_creator_os == EXT2_OS_HURD)
+		return;
+
+	retval = ext2fs_get_memzero(ctx.inode_size, &ctx.zero_inode);
+	if (retval)
+		fatal_err(retval, "while allocating memory");
+
+	retval = ext2fs_get_mem(64 * 1024, &ctx.ea_buf);
+	if (retval)
+		fatal_err(retval, "while allocating memory");
+
+	/*
+	 * Extended attribute inodes have a lookup hash that needs to be
+	 * recalculated with the new csum_seed. Other inodes referencing xattr
+	 * inodes need this value to be up to date. That's why we do two passes:
+	 *
+	 * pass 1: update xattr inodes to update their lookup hash as well as
+	 *         other checksums.
+	 *
+	 * pass 2: go over other inodes to update their checksums.
+	 */
+	if (ext2fs_has_feature_ea_inode(fs->super) && (flags & REWRITE_EA_FL))
+		rewrite_inodes_pass(&ctx, REWRITE_EA_FL);
+	flags &= ~REWRITE_EA_FL;
+	rewrite_inodes_pass(&ctx, flags);
+
+	ext2fs_free_mem(&ctx.zero_inode);
+	ext2fs_free_mem(&ctx.ea_buf);
+}
+
+static errcode_t rewrite_metadata_checksums(ext2_filsys fs, unsigned int flags)
+{
+	errcode_t retval;
+	dgrp_t i;
+
+	fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
+	ext2fs_init_csum_seed(fs);
+	for (i = 0; i < fs->group_desc_count; i++)
+		ext2fs_group_desc_csum_set(fs, i);
+	retval = ext2fs_read_bitmaps(fs);
+	if (retval)
+		fatal_err(retval, "while reading bitmaps");
+	rewrite_inodes(fs, flags);
+	ext2fs_mark_ib_dirty(fs);
+	ext2fs_mark_bb_dirty(fs);
+	retval = ext2fs_mmp_update2(fs, 1);
+	if (retval)
+		return retval;
+	fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
+	fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
+	if (ext2fs_has_feature_metadata_csum(fs->super))
+		fs->super->s_checksum_type = EXT2_CRC32C_CHKSUM;
+	else
+		fs->super->s_checksum_type = 0;
+	ext2fs_mark_super_dirty(fs);
+	return 0;
+}
+
+static void enable_uninit_bg(ext2_filsys fs)
+{
+	struct ext2_group_desc *gd;
+	dgrp_t i;
+
+	for (i = 0; i < fs->group_desc_count; i++) {
+		gd = ext2fs_group_desc(fs, fs->group_desc, i);
+		gd->bg_itable_unused = 0;
+		gd->bg_flags = EXT2_BG_INODE_ZEROED;
+		ext2fs_group_desc_csum_set(fs, i);
+	}
+	fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
+}
+
+static errcode_t zero_empty_inodes(ext2_filsys fs)
+{
+	int length = EXT2_INODE_SIZE(fs->super);
+	struct ext2_inode *inode = NULL;
+	ext2_inode_scan	scan;
+	errcode_t	retval;
+	ext2_ino_t	ino;
+
+	retval = ext2fs_open_inode_scan(fs, 0, &scan);
+	if (retval)
+		goto out;
+
+	retval = ext2fs_get_mem(length, &inode);
+	if (retval)
+		goto out;
+
+	do {
+		retval = ext2fs_get_next_inode_full(scan, &ino, inode, length);
+		if (retval)
+			goto out;
+		if (!ino)
+			break;
+		if (!ext2fs_test_inode_bitmap2(fs->inode_map, ino)) {
+			memset(inode, 0, length);
+			retval = ext2fs_write_inode_full(fs, ino, inode,
+							 length);
+			if (retval)
+				goto out;
+		}
+	} while (1);
+
+out:
+	ext2fs_free_mem(&inode);
+	ext2fs_close_inode_scan(scan);
+	return retval;
+}
+
+static int has_casefold_inode(ext2_filsys fs)
+{
+	int length = EXT2_INODE_SIZE(fs->super);
+	struct ext2_inode *inode = NULL;
+	ext2_inode_scan	scan;
+	errcode_t	retval;
+	ext2_ino_t	ino;
+	int found_casefold = 0;
+
+	retval = ext2fs_get_mem(length, &inode);
+	if (retval)
+		fatal_err(retval, "while allocating memory");
+
+	retval = ext2fs_open_inode_scan(fs, 0, &scan);
+	if (retval)
+		fatal_err(retval, "while opening inode scan");
+
+	do {
+		retval = ext2fs_get_next_inode_full(scan, &ino, inode, length);
+		if (retval)
+			fatal_err(retval, "while getting next inode");
+		if (!ino)
+			break;
+
+		if(inode->i_flags & EXT4_CASEFOLD_FL) {
+			found_casefold = 1;
+			break;
+		}
+	} while(1);
+
+	ext2fs_free_mem(&inode);
+	ext2fs_close_inode_scan(scan);
+	return found_casefold;
+}
+
+static errcode_t disable_uninit_bg(ext2_filsys fs, __u32 csum_feature_flag)
+{
+	struct ext2_group_desc *gd;
+	dgrp_t i;
+	errcode_t retval;
+	blk64_t b, c, d;
+
+	/* Load bitmaps to ensure that the uninit ones get written out */
+	fs->super->s_feature_ro_compat |= csum_feature_flag;
+	retval = ext2fs_read_bitmaps(fs);
+	fs->super->s_feature_ro_compat &= ~csum_feature_flag;
+	if (retval) {
+		com_err("disable_uninit_bg", retval,
+			"while reading bitmaps");
+		request_fsck_afterwards(fs);
+		return retval;
+	}
+	ext2fs_mark_ib_dirty(fs);
+	ext2fs_mark_bb_dirty(fs);
+
+	/* If we're only turning off uninit_bg, zero the inodes */
+	if (csum_feature_flag == EXT4_FEATURE_RO_COMPAT_GDT_CSUM) {
+		retval = zero_empty_inodes(fs);
+		if (retval) {
+			com_err("disable_uninit_bg", retval,
+				"while zeroing unused inodes");
+			request_fsck_afterwards(fs);
+			return retval;
+		}
+	}
+
+	/* The bbitmap is zeroed; we must mark group metadata blocks in use */
+	for (i = 0; i < fs->group_desc_count; i++) {
+		b = ext2fs_block_bitmap_loc(fs, i);
+		ext2fs_mark_block_bitmap2(fs->block_map, b);
+		b = ext2fs_inode_bitmap_loc(fs, i);
+		ext2fs_mark_block_bitmap2(fs->block_map, b);
+
+		retval = ext2fs_super_and_bgd_loc2(fs, i, &b, &c, &d, NULL);
+		if (retval == 0 && b)
+			ext2fs_mark_block_bitmap2(fs->block_map, b);
+		if (retval == 0 && c)
+			ext2fs_mark_block_bitmap2(fs->block_map, c);
+		if (retval == 0 && d)
+			ext2fs_mark_block_bitmap2(fs->block_map, d);
+		if (retval) {
+			com_err("disable_uninit_bg", retval,
+				"while initializing block bitmaps");
+			request_fsck_afterwards(fs);
+		}
+
+		gd = ext2fs_group_desc(fs, fs->group_desc, i);
+		gd->bg_itable_unused = 0;
+		gd->bg_flags = 0;
+		ext2fs_group_desc_csum_set(fs, i);
+	}
+	fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
+	ext2fs_mark_super_dirty(fs);
+
+	return 0;
+}
+
+static void
+try_confirm_csum_seed_support(void)
+{
+	if (access("/sys/fs/ext4/features/metadata_csum_seed", R_OK))
+		fputs(_("WARNING: Could not confirm kernel support for "
+			"metadata_csum_seed.\n  This requires Linux >= "
+			"v4.4.\n"), stderr);
+}
+
+/*
+ * Update the feature set as provided by the user.
+ */
+static int update_feature_set(ext2_filsys fs, char *features)
+{
+	struct ext2_super_block *sb = fs->super;
+	__u32		old_features[3];
+	int		type_err;
+	unsigned int	mask_err;
+	errcode_t	err;
+	enum quota_type qtype;
+
+#define FEATURE_ON(type, mask) (!(old_features[(type)] & (mask)) && \
+				((&sb->s_feature_compat)[(type)] & (mask)))
+#define FEATURE_OFF(type, mask) ((old_features[(type)] & (mask)) && \
+				 !((&sb->s_feature_compat)[(type)] & (mask)))
+#define FEATURE_CHANGED(type, mask) ((mask) & \
+		     (old_features[(type)] ^ (&sb->s_feature_compat)[(type)]))
+
+	old_features[E2P_FEATURE_COMPAT] = sb->s_feature_compat;
+	old_features[E2P_FEATURE_INCOMPAT] = sb->s_feature_incompat;
+	old_features[E2P_FEATURE_RO_INCOMPAT] = sb->s_feature_ro_compat;
+
+	if (e2p_edit_feature2(features, &sb->s_feature_compat,
+			      ok_features, clear_ok_features,
+			      &type_err, &mask_err)) {
+		if (!mask_err)
+			fprintf(stderr,
+				_("Invalid filesystem option set: %s\n"),
+				features);
+		else if (type_err & E2P_FEATURE_NEGATE_FLAG)
+			fprintf(stderr, _("Clearing filesystem feature '%s' "
+					  "not supported.\n"),
+				e2p_feature2string(type_err &
+						   E2P_FEATURE_TYPE_MASK,
+						   mask_err));
+		else
+			fprintf(stderr, _("Setting filesystem feature '%s' "
+					  "not supported.\n"),
+				e2p_feature2string(type_err, mask_err));
+		return 1;
+	}
+
+	if (FEATURE_OFF(E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
+		if ((mount_flags & EXT2_MF_MOUNTED) &&
+		    !(mount_flags & EXT2_MF_READONLY)) {
+			fputs(_("The has_journal feature may only be "
+				"cleared when the filesystem is\n"
+				"unmounted or mounted "
+				"read-only.\n"), stderr);
+			return 1;
+		}
+		if (ext2fs_has_feature_journal_needs_recovery(sb) &&
+		    f_flag < 2) {
+			fputs(_("The needs_recovery flag is set.  "
+				"Please run e2fsck before clearing\n"
+				"the has_journal flag.\n"), stderr);
+			return 1;
+		}
+		if (sb->s_journal_inum) {
+			if (remove_journal_inode(fs))
+				return 1;
+		}
+		if (sb->s_journal_dev) {
+			if (remove_journal_device(fs))
+				return 1;
+		}
+	}
+
+	if (FEATURE_OFF(E2P_FEATURE_COMPAT, EXT4_FEATURE_COMPAT_ORPHAN_FILE)) {
+		ext2_ino_t ino;
+
+		if (mount_flags & EXT2_MF_MOUNTED) {
+			fputs(_("The orphan_file feature may only be cleared "
+				"when the filesystem is unmounted.\n"), stderr);
+			return 1;
+		}
+		if (ext2fs_has_feature_orphan_present(sb) && f_flag < 2) {
+			fputs(_("The orphan_present feature is set. Please "
+				"run e2fsck before clearing orphan_file "
+				"feature.\n"),
+			      stderr);
+			return 1;
+		}
+		err = ext2fs_read_bitmaps(fs);
+		if (err) {
+			com_err(program_name, err, "%s",
+				_("while loading bitmaps"));
+			return 1;
+		}
+		err = ext2fs_truncate_orphan_file(fs);
+		if (err) {
+			com_err(program_name, err,
+				_("\n\twhile trying to delete orphan file\n"));
+			return 1;
+		}
+		ino = sb->s_orphan_file_inum;
+		sb->s_orphan_file_inum = 0;
+		ext2fs_inode_alloc_stats2(fs, ino, -1, 0);
+		ext2fs_clear_feature_orphan_file(sb);
+		ext2fs_clear_feature_orphan_present(sb);
+		ext2fs_mark_super_dirty(fs);
+	}
+
+	if (FEATURE_ON(E2P_FEATURE_COMPAT, EXT4_FEATURE_COMPAT_ORPHAN_FILE)) {
+		if (!ext2fs_has_feature_journal(sb)) {
+			fputs(_("orphan_file feature can be set only for "
+				"filesystems with journal.\n"), stderr);
+			return 1;
+		}
+		/*
+		 * If adding an orphan file, let the create orphan file
+		 * code below handle setting the flag and creating it.
+		 * We supply a default size if necessary.
+		 */
+		orphan_file_blocks = ext2fs_default_orphan_file_blocks(fs);
+		ext2fs_set_feature_orphan_file(sb);
+	}
+
+	if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
+		EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)) {
+		if (ext2fs_has_feature_meta_bg(sb)) {
+			fputs(_("Setting filesystem feature 'sparse_super' "
+				"not supported\nfor filesystems with "
+				"the meta_bg feature enabled.\n"),
+				stderr);
+			return 1;
+		}
+	}
+
+	if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP)) {
+		int error;
+
+		if ((mount_flags & EXT2_MF_MOUNTED) ||
+		    (mount_flags & EXT2_MF_READONLY)) {
+			fputs(_("The multiple mount protection feature can't\n"
+				"be set if the filesystem is mounted or\n"
+				"read-only.\n"), stderr);
+			return 1;
+		}
+
+		error = ext2fs_mmp_init(fs);
+		if (error) {
+			fputs(_("\nError while enabling multiple mount "
+				"protection feature."), stderr);
+			return 1;
+		}
+
+		/*
+		 * We want to update group desc with the new free blocks count
+		 */
+		fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
+
+		printf(_("Multiple mount protection has been enabled "
+			 "with update interval %ds.\n"),
+		       sb->s_mmp_update_interval);
+	}
+
+	if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP)) {
+		int error;
+
+		if (mount_flags & EXT2_MF_READONLY) {
+			fputs(_("The multiple mount protection feature cannot\n"
+				"be disabled if the filesystem is readonly.\n"),
+				stderr);
+			return 1;
+		}
+
+		error = ext2fs_read_bitmaps(fs);
+		if (error) {
+			fputs(_("Error while reading bitmaps\n"), stderr);
+			return 1;
+		}
+
+		error = ext2fs_mmp_read(fs, sb->s_mmp_block, NULL);
+		if (error) {
+			struct mmp_struct *mmp_cmp = fs->mmp_cmp;
+
+			if (error == EXT2_ET_MMP_MAGIC_INVALID)
+				printf(_("Magic number in MMP block does not "
+					 "match. expected: %x, actual: %x\n"),
+					 EXT4_MMP_MAGIC, mmp_cmp->mmp_magic);
+			else
+				com_err(program_name, error, "%s",
+					_("while reading MMP block."));
+			goto mmp_error;
+		}
+
+		/* We need to force out the group descriptors as well */
+		fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
+		ext2fs_block_alloc_stats2(fs, sb->s_mmp_block, -1);
+mmp_error:
+		sb->s_mmp_block = 0;
+		sb->s_mmp_update_interval = 0;
+	}
+
+	if (FEATURE_ON(E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
+		/*
+		 * If adding a journal flag, let the create journal
+		 * code below handle setting the flag and creating the
+		 * journal.  We supply a default size if necessary.
+		 */
+		if (!journal_size)
+			journal_size = -1;
+		ext2fs_clear_feature_journal(sb);
+	}
+
+	if (FEATURE_ON(E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_DIR_INDEX)) {
+		if (!sb->s_def_hash_version)
+			sb->s_def_hash_version = EXT2_HASH_HALF_MD4;
+		if (uuid_is_null((unsigned char *) sb->s_hash_seed))
+			uuid_generate((unsigned char *) sb->s_hash_seed);
+	}
+
+	if (FEATURE_OFF(E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_DIR_INDEX) &&
+	    ext2fs_has_feature_metadata_csum(sb)) {
+		if (check_fsck_needed(fs,
+			_("Disabling directory index on filesystem with "
+			  "checksums could take some time.")))
+			return 1;
+		if (mount_flags & EXT2_MF_MOUNTED) {
+			fputs(_("Cannot disable dir_index on a mounted "
+				"filesystem!\n"), stderr);
+			exit(1);
+		}
+		/*
+		 * Clearing dir_index on checksummed filesystem requires
+		 * rewriting all directories to update checksums.
+		 */
+		rewrite_checksums |= REWRITE_DIR_FL;
+	}
+
+	if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_FLEX_BG)) {
+		if (ext2fs_check_desc(fs)) {
+			fputs(_("Clearing the flex_bg flag would "
+				"cause the the filesystem to be\n"
+				"inconsistent.\n"), stderr);
+			return 1;
+		}
+	}
+
+	if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
+			    EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) {
+		if ((mount_flags & EXT2_MF_MOUNTED) &&
+		    !(mount_flags & EXT2_MF_READONLY)) {
+			fputs(_("The huge_file feature may only be "
+				"cleared when the filesystem is\n"
+				"unmounted or mounted "
+				"read-only.\n"), stderr);
+			return 1;
+		}
+	}
+
+	if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
+		       EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
+		if (check_fsck_needed(fs,
+			_("Enabling checksums could take some time.")))
+			return 1;
+		if (mount_flags & EXT2_MF_MOUNTED) {
+			fputs(_("Cannot enable metadata_csum on a mounted "
+				"filesystem!\n"), stderr);
+			return 1;
+		}
+		if (!ext2fs_has_feature_extents(fs->super))
+			printf("%s",
+			       _("Extents are not enabled.  The file extent "
+				 "tree can be checksummed, whereas block maps "
+				 "cannot.  Not enabling extents reduces the "
+				 "coverage of metadata checksumming.  "
+				 "Re-run with -O extent to rectify.\n"));
+		if (!ext2fs_has_feature_64bit(fs->super))
+			printf("%s",
+			       _("64-bit filesystem support is not enabled.  "
+				 "The larger fields afforded by this feature "
+				 "enable full-strength checksumming.  "
+				 "Run resize2fs -b to rectify.\n"));
+		rewrite_checksums = REWRITE_ALL;
+		/* metadata_csum supersedes uninit_bg */
+		ext2fs_clear_feature_gdt_csum(fs->super);
+
+		/* if uninit_bg was previously off, rewrite group desc */
+		if (!(old_features[E2P_FEATURE_RO_INCOMPAT] &
+		      EXT4_FEATURE_RO_COMPAT_GDT_CSUM))
+			enable_uninit_bg(fs);
+
+		/*
+		 * Since metadata_csum supersedes uninit_bg, pretend like
+		 * uninit_bg has been off all along.
+		 */
+		old_features[E2P_FEATURE_RO_INCOMPAT] &=
+			~EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
+	}
+
+	if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
+			EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
+		__u32	test_features[3];
+
+		if (check_fsck_needed(fs,
+			_("Disabling checksums could take some time.")))
+			return 1;
+		if (mount_flags & EXT2_MF_MOUNTED) {
+			fputs(_("Cannot disable metadata_csum on a mounted "
+				"filesystem!\n"), stderr);
+			return 1;
+		}
+		rewrite_checksums = REWRITE_ALL;
+
+		/* Enable uninit_bg unless the user expressly turned it off */
+		memcpy(test_features, old_features, sizeof(test_features));
+		test_features[E2P_FEATURE_RO_INCOMPAT] |=
+						EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
+		e2p_edit_feature2(features, test_features, ok_features,
+				  clear_ok_features, NULL, NULL);
+		if (test_features[E2P_FEATURE_RO_INCOMPAT] &
+						EXT4_FEATURE_RO_COMPAT_GDT_CSUM)
+			ext2fs_set_feature_gdt_csum(fs->super);
+
+		/*
+		 * If we're turning off metadata_csum and not turning on
+		 * uninit_bg, rewrite group desc.
+		 */
+		if (!ext2fs_has_feature_gdt_csum(fs->super)) {
+			err = disable_uninit_bg(fs,
+					EXT4_FEATURE_RO_COMPAT_METADATA_CSUM);
+			if (err)
+				return 1;
+		} else
+			/*
+			 * metadata_csum previously provided uninit_bg, so if
+			 * we're also setting the uninit_bg feature bit,
+			 * pretend like it was previously enabled.  Checksums
+			 * will be rewritten with crc16 later.
+			 */
+			old_features[E2P_FEATURE_RO_INCOMPAT] |=
+				EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
+		fs->super->s_checksum_seed = 0;
+		ext2fs_clear_feature_csum_seed(fs->super);
+	}
+
+	if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
+		       EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
+		if (mount_flags & EXT2_MF_MOUNTED) {
+			fputs(_("Cannot enable uninit_bg on a mounted "
+				"filesystem!\n"), stderr);
+			return 1;
+		}
+
+		/* Do not enable uninit_bg when metadata_csum enabled */
+		if (ext2fs_has_feature_metadata_csum(fs->super))
+			ext2fs_clear_feature_gdt_csum(fs->super);
+		else
+			enable_uninit_bg(fs);
+	}
+
+	if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
+			EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
+		if (mount_flags & EXT2_MF_MOUNTED) {
+			fputs(_("Cannot disable uninit_bg on a mounted "
+				"filesystem!\n"), stderr);
+			return 1;
+		}
+
+		err = disable_uninit_bg(fs,
+				EXT4_FEATURE_RO_COMPAT_GDT_CSUM);
+		if (err)
+			return 1;
+	}
+
+	/*
+	 * We don't actually toggle 64bit; resize2fs does that.  But this
+	 * must come after the metadata_csum feature_on so that it won't
+	 * complain about the lack of 64bit.
+	 */
+	if (FEATURE_ON(E2P_FEATURE_INCOMPAT,
+		       EXT4_FEATURE_INCOMPAT_64BIT)) {
+		if (mount_flags & EXT2_MF_MOUNTED) {
+			fprintf(stderr, _("Cannot enable 64-bit mode "
+					  "while mounted!\n"));
+			return 1;
+		}
+		ext2fs_clear_feature_64bit(sb);
+		feature_64bit = 1;
+	}
+	if (FEATURE_OFF(E2P_FEATURE_INCOMPAT,
+			EXT4_FEATURE_INCOMPAT_64BIT)) {
+		if (mount_flags & EXT2_MF_MOUNTED) {
+			fprintf(stderr, _("Cannot disable 64-bit mode "
+					  "while mounted!\n"));
+			return 1;
+		}
+		ext2fs_set_feature_64bit(sb);
+		feature_64bit = -1;
+	}
+
+	if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
+				EXT4_FEATURE_RO_COMPAT_QUOTA)) {
+		/*
+		 * Set the Q_flag here and handle the quota options in the code
+		 * below.
+		 */
+		if (!Q_flag) {
+			Q_flag = 1;
+			/* Enable usr/grp quota by default */
+			for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
+				if (qtype != PRJQUOTA)
+					quota_enable[qtype] = QOPT_ENABLE;
+				else
+					quota_enable[qtype] = QOPT_DISABLE;
+			}
+		}
+		ext2fs_clear_feature_quota(sb);
+	}
+
+	if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
+		       EXT4_FEATURE_RO_COMPAT_PROJECT)) {
+		if (fs->super->s_inode_size == EXT2_GOOD_OLD_INODE_SIZE) {
+			fprintf(stderr, _("Cannot enable project feature; "
+					  "inode size too small.\n"));
+			return 1;
+		}
+		Q_flag = 1;
+		quota_enable[PRJQUOTA] = QOPT_ENABLE;
+	}
+
+	if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
+			EXT4_FEATURE_RO_COMPAT_PROJECT)) {
+		Q_flag = 1;
+		quota_enable[PRJQUOTA] = QOPT_DISABLE;
+	}
+
+	if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
+				EXT4_FEATURE_RO_COMPAT_QUOTA)) {
+		/*
+		 * Set the Q_flag here and handle the quota options in the code
+		 * below.
+		 */
+		if (Q_flag)
+			fputs(_("\nWarning: '^quota' option overrides '-Q'"
+				"arguments.\n"), stderr);
+		Q_flag = 1;
+		/* Disable all quota by default */
+		for (qtype = 0; qtype < MAXQUOTAS; qtype++)
+			quota_enable[qtype] = QOPT_DISABLE;
+	}
+
+	if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_ENCRYPT)) {
+		fs->super->s_encrypt_algos[0] =
+			EXT4_ENCRYPTION_MODE_AES_256_XTS;
+		fs->super->s_encrypt_algos[1] =
+			EXT4_ENCRYPTION_MODE_AES_256_CTS;
+	}
+
+	if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_CASEFOLD)) {
+		if (mount_flags & EXT2_MF_MOUNTED) {
+			fputs(_("The casefold feature may only be enabled when "
+				"the filesystem is unmounted.\n"), stderr);
+			return 1;
+		}
+		fs->super->s_encoding = EXT4_ENC_UTF8_12_1;
+		fs->super->s_encoding_flags = e2p_get_encoding_flags(EXT4_ENC_UTF8_12_1);
+		enabling_casefold = 1;
+	}
+
+	if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_CASEFOLD)) {
+		if (mount_flags & EXT2_MF_MOUNTED) {
+			fputs(_("The casefold feature may only be disabled when "
+				"the filesystem is unmounted.\n"), stderr);
+			return 1;
+		}
+		if (has_casefold_inode(fs)) {
+			fputs(_("The casefold feature can't be cleared when "
+					"there are inodes with +F flag.\n"), stderr);
+			return 1;
+		}
+		fs->super->s_encoding = 0;
+		fs->super->s_encoding_flags = 0;
+		enabling_casefold = 0;
+	}
+
+	if (FEATURE_ON(E2P_FEATURE_INCOMPAT,
+		EXT4_FEATURE_INCOMPAT_CSUM_SEED)) {
+		if (!ext2fs_has_feature_metadata_csum(sb)) {
+			fputs(_("Setting feature 'metadata_csum_seed' "
+				"is only supported\non filesystems with "
+				"the metadata_csum feature enabled.\n"),
+				stderr);
+			return 1;
+		}
+		try_confirm_csum_seed_support();
+		fs->super->s_checksum_seed = fs->csum_seed;
+	}
+
+	if (FEATURE_OFF(E2P_FEATURE_INCOMPAT,
+		EXT4_FEATURE_INCOMPAT_CSUM_SEED)) {
+		__le32 uuid_seed;
+
+		uuid_seed = ext2fs_crc32c_le(~0, fs->super->s_uuid,
+					sizeof(fs->super->s_uuid));
+		if (fs->super->s_checksum_seed != uuid_seed) {
+			if (mount_flags & (EXT2_MF_BUSY|EXT2_MF_MOUNTED)) {
+				fputs(_("UUID has changed since enabling "
+		"metadata_csum.  Filesystem must be unmounted "
+		"\nto safely rewrite all metadata to match the new UUID.\n"),
+				      stderr);
+				return 1;
+			}
+			if (check_fsck_needed(fs, _("Recalculating checksums "
+						    "could take some time.")))
+				return 1;
+			rewrite_checksums = REWRITE_ALL;
+		}
+	}
+
+	if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
+	    (sb->s_feature_compat || sb->s_feature_ro_compat ||
+	     sb->s_feature_incompat))
+		ext2fs_update_dynamic_rev(fs);
+
+	if (FEATURE_CHANGED(E2P_FEATURE_RO_INCOMPAT,
+			    EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER) ||
+	    FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
+			EXT4_FEATURE_RO_COMPAT_HUGE_FILE) ||
+	    FEATURE_CHANGED(E2P_FEATURE_INCOMPAT,
+			    EXT2_FEATURE_INCOMPAT_FILETYPE) ||
+	    FEATURE_CHANGED(E2P_FEATURE_COMPAT,
+			    EXT2_FEATURE_COMPAT_RESIZE_INODE) ||
+	    FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
+			EXT2_FEATURE_RO_COMPAT_LARGE_FILE))
+		request_fsck_afterwards(fs);
+
+	if ((old_features[E2P_FEATURE_COMPAT] != sb->s_feature_compat) ||
+	    (old_features[E2P_FEATURE_INCOMPAT] != sb->s_feature_incompat) ||
+	    (old_features[E2P_FEATURE_RO_INCOMPAT] != sb->s_feature_ro_compat))
+		ext2fs_mark_super_dirty(fs);
+
+	return 0;
+}
+
+/*
+ * Add a journal to the filesystem.
+ */
+static int add_journal(ext2_filsys fs)
+{
+	struct ext2fs_journal_params	jparams;
+	errcode_t	retval;
+	ext2_filsys	jfs;
+	io_manager	io_ptr;
+
+	if (ext2fs_has_feature_journal(fs->super)) {
+		fputs(_("The filesystem already has a journal.\n"), stderr);
+		goto err;
+	}
+	if (journal_device) {
+		if (!check_plausibility(journal_device, CHECK_BLOCK_DEV,
+					NULL))
+			proceed_question(-1);
+		check_mount(journal_device, 0, _("journal"));
+#ifdef CONFIG_TESTIO_DEBUG
+		if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
+			io_ptr = test_io_manager;
+			test_io_backing_manager = unix_io_manager;
+		} else
+#endif
+			io_ptr = unix_io_manager;
+		retval = ext2fs_open(journal_device, EXT2_FLAG_RW|
+				     EXT2_FLAG_JOURNAL_DEV_OK, 0,
+				     fs->blocksize, io_ptr, &jfs);
+		if (retval) {
+			com_err(program_name, retval,
+				_("\n\twhile trying to open journal on %s\n"),
+				journal_device);
+			goto err;
+		}
+		printf(_("Creating journal on device %s: "),
+		       journal_device);
+		fflush(stdout);
+
+		retval = ext2fs_add_journal_device(fs, jfs);
+		ext2fs_close_free(&jfs);
+		if (retval) {
+			com_err(program_name, retval,
+				_("while adding filesystem to journal on %s"),
+				journal_device);
+			goto err;
+		}
+		fputs(_("done\n"), stdout);
+	} else if (journal_size) {
+		fputs(_("Creating journal inode: "), stdout);
+		fflush(stdout);
+		figure_journal_size(&jparams, journal_size, journal_fc_size, fs);
+
+		if (journal_location_string)
+			journal_location =
+				parse_num_blocks2(journal_location_string,
+						  fs->super->s_log_block_size);
+		retval = ext2fs_add_journal_inode3(fs, &jparams,
+						   journal_location,
+						   journal_flags);
+		if (retval) {
+			fprintf(stderr, "\n");
+			com_err(program_name, retval, "%s",
+				_("\n\twhile trying to create journal file"));
+			return retval;
+		}
+		fs->super->s_overhead_clusters += EXT2FS_NUM_B2C(fs,
+			jparams.num_journal_blocks + jparams.num_fc_blocks);
+		ext2fs_mark_super_dirty(fs);
+		fputs(_("done\n"), stdout);
+
+		/*
+		 * If the filesystem wasn't mounted, we need to force
+		 * the block group descriptors out.
+		 */
+		if ((mount_flags & EXT2_MF_MOUNTED) == 0)
+			fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
+	}
+	print_check_message(fs->super->s_max_mnt_count,
+			    fs->super->s_checkinterval);
+	return 0;
+
+err:
+	free(journal_device);
+	return 1;
+}
+
+static int handle_quota_options(ext2_filsys fs)
+{
+	errcode_t retval;
+	quota_ctx_t qctx;
+	ext2_ino_t qf_ino;
+	enum quota_type qtype;
+	unsigned int qtype_bits = 0;
+	int need_dirty = 0;
+
+	for (qtype = 0 ; qtype < MAXQUOTAS; qtype++)
+		if (quota_enable[qtype] != 0)
+			break;
+	if (qtype == MAXQUOTAS)
+		/* Nothing to do. */
+		return 0;
+
+	if (quota_enable[PRJQUOTA] == QOPT_ENABLE &&
+	    fs->super->s_inode_size == EXT2_GOOD_OLD_INODE_SIZE) {
+		fprintf(stderr, _("Cannot enable project quota; "
+				  "inode size too small.\n"));
+		return 1;
+	}
+
+	for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
+		if (quota_enable[qtype] == QOPT_ENABLE)
+			qtype_bits |= 1 << qtype;
+	}
+
+	retval = quota_init_context(&qctx, fs, qtype_bits);
+	if (retval) {
+		com_err(program_name, retval,
+			_("while initializing quota context in support library"));
+		return 1;
+	}
+
+	if (qtype_bits)
+		quota_compute_usage(qctx);
+
+	for (qtype = 0 ; qtype < MAXQUOTAS; qtype++) {
+		if (quota_enable[qtype] == QOPT_ENABLE &&
+		    *quota_sb_inump(fs->super, qtype) == 0) {
+			if ((qf_ino = quota_file_exists(fs, qtype)) > 0) {
+				retval = quota_read_all_dquots(qctx, qf_ino,
+							       qtype,
+							       QREAD_LIMITS);
+				if (retval) {
+					com_err(program_name, retval,
+						_("while updating quota limits (%d)"),
+						qtype);
+				quota_errout:
+					quota_release_context(&qctx);
+					return 1;
+				}
+			}
+			retval = quota_write_inode(qctx, 1 << qtype);
+			if (retval) {
+				com_err(program_name, retval,
+					_("while writing quota file (%d)"),
+					qtype);
+				goto quota_errout;
+			}
+			/* Enable Quota feature if one of quota enabled */
+			if (!ext2fs_has_feature_quota(fs->super)) {
+				ext2fs_set_feature_quota(fs->super);
+				need_dirty = 1;
+			}
+			if (qtype == PRJQUOTA &&
+			    !ext2fs_has_feature_project(fs->super)) {
+				ext2fs_set_feature_project(fs->super);
+				need_dirty = 1;
+			}
+		} else if (quota_enable[qtype] == QOPT_DISABLE) {
+			retval = quota_remove_inode(fs, qtype);
+			if (retval) {
+				com_err(program_name, retval,
+					_("while removing quota file (%d)"),
+					qtype);
+				goto quota_errout;
+			}
+			if (qtype == PRJQUOTA) {
+				ext2fs_clear_feature_project(fs->super);
+				need_dirty = 1;
+			}
+		}
+	}
+
+	quota_release_context(&qctx);
+	/* Clear Quota feature if all quota types disabled. */
+	if (!qtype_bits) {
+		for (qtype = 0 ; qtype < MAXQUOTAS; qtype++)
+			if (*quota_sb_inump(fs->super, qtype))
+				break;
+		if (qtype == MAXQUOTAS) {
+			ext2fs_clear_feature_quota(fs->super);
+			need_dirty = 1;
+		}
+
+	}
+	if (need_dirty)
+		ext2fs_mark_super_dirty(fs);
+	return 0;
+}
+
+static int option_handle_function(char *token)
+{
+	if (strncmp(token, "usr", 3) == 0) {
+		quota_enable[USRQUOTA] = QOPT_ENABLE;
+	} else if (strncmp(token, "^usr", 4) == 0) {
+		quota_enable[USRQUOTA] = QOPT_DISABLE;
+	} else if (strncmp(token, "grp", 3) == 0) {
+		quota_enable[GRPQUOTA] = QOPT_ENABLE;
+	} else if (strncmp(token, "^grp", 4) == 0) {
+		quota_enable[GRPQUOTA] = QOPT_DISABLE;
+	} else if (strncmp(token, "prj", 3) == 0) {
+		quota_enable[PRJQUOTA] = QOPT_ENABLE;
+	} else if (strncmp(token, "^prj", 4) == 0) {
+		quota_enable[PRJQUOTA] = QOPT_DISABLE;
+	} else {
+		fputs(_("\nBad quota options specified.\n\n"
+			"Following valid quota options are available "
+			"(pass by separating with comma):\n"
+			"\t[^]usr[quota]\n"
+			"\t[^]grp[quota]\n"
+			"\t[^]prj[quota]\n"
+			"\n\n"), stderr);
+		return 1;
+	}
+	return 0;
+}
+
+static void parse_e2label_options(int argc, char ** argv)
+{
+	if ((argc < 2) || (argc > 3)) {
+		fputs(_("Usage: e2label device [newlabel]\n"), stderr);
+		exit(1);
+	}
+	io_options = strchr(argv[1], '?');
+	if (io_options)
+		*io_options++ = 0;
+	device_name = get_devname(NULL, argv[1], NULL);
+	if (!device_name) {
+		com_err("e2label", 0, _("Unable to resolve '%s'"),
+			argv[1]);
+		exit(1);
+	}
+	open_flag = EXT2_FLAG_JOURNAL_DEV_OK | EXT2_FLAG_SUPER_ONLY;
+	if (argc == 3) {
+		open_flag |= EXT2_FLAG_RW;
+		L_flag = 1;
+		new_label = argv[2];
+	} else
+		print_label++;
+}
+
+static time_t parse_time(char *str)
+{
+	struct	tm	ts;
+
+	if (strcmp(str, "now") == 0) {
+		return (time(0));
+	}
+	memset(&ts, 0, sizeof(ts));
+#ifdef HAVE_STRPTIME
+	strptime(str, "%Y%m%d%H%M%S", &ts);
+#else
+	sscanf(str, "%4d%2d%2d%2d%2d%2d", &ts.tm_year, &ts.tm_mon,
+	       &ts.tm_mday, &ts.tm_hour, &ts.tm_min, &ts.tm_sec);
+	ts.tm_year -= 1900;
+	ts.tm_mon -= 1;
+	if (ts.tm_year < 0 || ts.tm_mon < 0 || ts.tm_mon > 11 ||
+	    ts.tm_mday < 0 || ts.tm_mday > 31 || ts.tm_hour > 23 ||
+	    ts.tm_min > 59 || ts.tm_sec > 61)
+		ts.tm_mday = 0;
+#endif
+	if (ts.tm_mday == 0) {
+		com_err(program_name, 0,
+			_("Couldn't parse date/time specifier: %s"),
+			str);
+		usage();
+	}
+	ts.tm_isdst = -1;
+	return (mktime(&ts));
+}
+
+static void parse_tune2fs_options(int argc, char **argv)
+{
+	int c;
+	char *tmp;
+	struct group *gr;
+	struct passwd *pw;
+	int ret;
+	char optstring[100] = "c:e:fg:i:jlm:o:r:s:u:C:E:I:J:L:M:O:T:U:z:Q:";
+
+	open_flag = 0;
+	printf("tune2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
+	while ((c = getopt(argc, argv, optstring)) != EOF)
+		switch (c) {
+		case 'c':
+			open_flag = EXT2_FLAG_RW;
+			c_flag = 1;
+			if (strcmp(optarg, "random") == 0) {
+				max_mount_count = 65536;
+				break;
+			}
+			max_mount_count = strtol(optarg, &tmp, 0);
+			if (*tmp || max_mount_count > 16000 ||
+			    max_mount_count < -16000) {
+				com_err(program_name, 0,
+					_("bad mounts count - %s"),
+					optarg);
+				usage();
+			}
+			if (max_mount_count == 0)
+				max_mount_count = -1;
+			break;
+		case 'C':
+			mount_count = strtoul(optarg, &tmp, 0);
+			if (*tmp || mount_count > 16000) {
+				com_err(program_name, 0,
+					_("bad mounts count - %s"),
+					optarg);
+				usage();
+			}
+			C_flag = 1;
+			open_flag = EXT2_FLAG_RW;
+			break;
+		case 'e':
+			if (strcmp(optarg, "continue") == 0)
+				errors = EXT2_ERRORS_CONTINUE;
+			else if (strcmp(optarg, "remount-ro") == 0)
+				errors = EXT2_ERRORS_RO;
+			else if (strcmp(optarg, "panic") == 0)
+				errors = EXT2_ERRORS_PANIC;
+			else {
+				com_err(program_name, 0,
+					_("bad error behavior - %s"),
+					optarg);
+				usage();
+			}
+			e_flag = 1;
+			open_flag = EXT2_FLAG_RW;
+			break;
+		case 'E':
+			extended_cmd = optarg;
+			open_flag |= EXT2_FLAG_RW;
+			break;
+		case 'f': /* Force */
+			f_flag++;
+			break;
+		case 'g':
+			resgid = strtoul(optarg, &tmp, 0);
+			if (*tmp) {
+				gr = getgrnam(optarg);
+				if (gr == NULL)
+					tmp = optarg;
+				else {
+					resgid = gr->gr_gid;
+					*tmp = 0;
+				}
+			}
+			if (*tmp) {
+				com_err(program_name, 0,
+					_("bad gid/group name - %s"),
+					optarg);
+				usage();
+			}
+			g_flag = 1;
+			open_flag = EXT2_FLAG_RW;
+			break;
+		case 'i':
+			interval = strtoul(optarg, &tmp, 0);
+			switch (*tmp) {
+			case 's':
+				tmp++;
+				break;
+			case '\0':
+			case 'd':
+			case 'D': /* days */
+				interval *= 86400;
+				if (*tmp != '\0')
+					tmp++;
+				break;
+			case 'm':
+			case 'M': /* months! */
+				interval *= 86400 * 30;
+				tmp++;
+				break;
+			case 'w':
+			case 'W': /* weeks */
+				interval *= 86400 * 7;
+				tmp++;
+				break;
+			}
+			if (*tmp) {
+				com_err(program_name, 0,
+					_("bad interval - %s"), optarg);
+				usage();
+			}
+			i_flag = 1;
+			open_flag = EXT2_FLAG_RW;
+			break;
+		case 'j':
+			if (!journal_size)
+				journal_size = -1;
+			open_flag = EXT2_FLAG_RW;
+			break;
+		case 'J':
+			parse_journal_opts(optarg);
+			open_flag = EXT2_FLAG_RW;
+			break;
+		case 'l':
+			l_flag = 1;
+			break;
+		case 'L':
+			new_label = optarg;
+			L_flag = 1;
+			open_flag |= EXT2_FLAG_RW |
+				EXT2_FLAG_JOURNAL_DEV_OK;
+			break;
+		case 'm':
+			reserved_ratio = strtod(optarg, &tmp);
+			if (*tmp || reserved_ratio > 50 ||
+			    reserved_ratio < 0) {
+				com_err(program_name, 0,
+					_("bad reserved block ratio - %s"),
+					optarg);
+				usage();
+			}
+			m_flag = 1;
+			open_flag = EXT2_FLAG_RW;
+			break;
+		case 'M':
+			new_last_mounted = optarg;
+			M_flag = 1;
+			open_flag = EXT2_FLAG_RW;
+			break;
+		case 'o':
+			if (mntopts_cmd) {
+				com_err(program_name, 0, "%s",
+					_("-o may only be specified once"));
+				usage();
+			}
+			mntopts_cmd = optarg;
+			open_flag = EXT2_FLAG_RW;
+			break;
+		case 'O':
+			if (features_cmd) {
+				com_err(program_name, 0, "%s",
+					_("-O may only be specified once"));
+				usage();
+			}
+			features_cmd = optarg;
+			open_flag = EXT2_FLAG_RW;
+			break;
+		case 'Q':
+			Q_flag = 1;
+			ret = parse_quota_opts(optarg, option_handle_function);
+			if (ret)
+				exit(1);
+			open_flag = EXT2_FLAG_RW;
+			break;
+		case 'r':
+			reserved_blocks = strtoul(optarg, &tmp, 0);
+			if (*tmp) {
+				com_err(program_name, 0,
+					_("bad reserved blocks count - %s"),
+					optarg);
+				usage();
+			}
+			r_flag = 1;
+			open_flag = EXT2_FLAG_RW;
+			break;
+		case 's': /* Deprecated */
+			s_flag = atoi(optarg);
+			open_flag = EXT2_FLAG_RW;
+			break;
+		case 'T':
+			T_flag = 1;
+			last_check_time = parse_time(optarg);
+			open_flag = EXT2_FLAG_RW;
+			break;
+		case 'u':
+				resuid = strtoul(optarg, &tmp, 0);
+				if (*tmp) {
+					pw = getpwnam(optarg);
+					if (pw == NULL)
+						tmp = optarg;
+					else {
+						resuid = pw->pw_uid;
+						*tmp = 0;
+					}
+				}
+				if (*tmp) {
+					com_err(program_name, 0,
+						_("bad uid/user name - %s"),
+						optarg);
+					usage();
+				}
+				u_flag = 1;
+				open_flag = EXT2_FLAG_RW;
+				break;
+		case 'U':
+			requested_uuid = optarg;
+			U_flag = 1;
+			open_flag = EXT2_FLAG_RW |
+				EXT2_FLAG_JOURNAL_DEV_OK;
+			break;
+		case 'I':
+			new_inode_size = strtoul(optarg, &tmp, 0);
+			if (*tmp) {
+				com_err(program_name, 0,
+					_("bad inode size - %s"),
+					optarg);
+				usage();
+			}
+			if (!((new_inode_size &
+			       (new_inode_size - 1)) == 0)) {
+				com_err(program_name, 0,
+					_("Inode size must be a "
+					  "power of two- %s"),
+					optarg);
+				usage();
+			}
+			open_flag = EXT2_FLAG_RW;
+			I_flag = 1;
+			break;
+		case 'z':
+			undo_file = optarg;
+			break;
+		default:
+			usage();
+		}
+	if (optind < argc - 1 || optind == argc)
+		usage();
+	if (!open_flag && !l_flag)
+		usage();
+	io_options = strchr(argv[optind], '?');
+	if (io_options)
+		*io_options++ = 0;
+	device_name = get_devname(NULL, argv[optind], NULL);
+	if (!device_name) {
+		com_err(program_name, 0, _("Unable to resolve '%s'"),
+			argv[optind]);
+		exit(1);
+	}
+}
+
+#ifdef CONFIG_BUILD_FINDFS
+void do_findfs(int argc, char **argv)
+{
+	char	*dev;
+
+	if ((argc != 2) ||
+	    (strncmp(argv[1], "LABEL=", 6) && strncmp(argv[1], "UUID=", 5))) {
+		fprintf(stderr, "Usage: findfs LABEL=<label>|UUID=<uuid>\n");
+		exit(2);
+	}
+	dev = blkid_get_devname(NULL, argv[1], NULL);
+	if (!dev) {
+		com_err("findfs", 0, _("Unable to resolve '%s'"),
+			argv[1]);
+		exit(1);
+	}
+	puts(dev);
+	exit(0);
+}
+#endif
+
+static int parse_extended_opts(ext2_filsys fs, const char *opts)
+{
+	struct ext2_super_block *sb = fs->super;
+	char	*buf, *token, *next, *p, *arg;
+	int	len, hash_alg;
+	int	r_usage = 0;
+	int encoding = 0;
+	char	*encoding_flags = NULL;
+
+	len = strlen(opts);
+	buf = malloc(len+1);
+	if (!buf) {
+		fprintf(stderr, "%s",
+			_("Couldn't allocate memory to parse options!\n"));
+		return 1;
+	}
+	strcpy(buf, opts);
+	for (token = buf; token && *token; token = next) {
+		p = strchr(token, ',');
+		next = 0;
+		if (p) {
+			*p = 0;
+			next = p+1;
+		}
+		arg = strchr(token, '=');
+		if (arg) {
+			*arg = 0;
+			arg++;
+		}
+		if (strcmp(token, "clear-mmp") == 0 ||
+		    strcmp(token, "clear_mmp") == 0) {
+			clear_mmp = 1;
+		} else if (strcmp(token, "mmp_update_interval") == 0) {
+			unsigned long intv;
+			if (!arg) {
+				r_usage++;
+				continue;
+			}
+			intv = strtoul(arg, &p, 0);
+			if (*p) {
+				fprintf(stderr,
+					_("Invalid mmp_update_interval: %s\n"),
+					arg);
+				r_usage++;
+				continue;
+			}
+			if (intv == 0) {
+				intv = EXT4_MMP_UPDATE_INTERVAL;
+			} else if (intv > EXT4_MMP_MAX_UPDATE_INTERVAL) {
+				fprintf(stderr,
+					_("mmp_update_interval too big: %lu\n"),
+					intv);
+				r_usage++;
+				continue;
+			}
+			printf(P_("Setting multiple mount protection update "
+				  "interval to %lu second\n",
+				  "Setting multiple mount protection update "
+				  "interval to %lu seconds\n", intv),
+			       intv);
+			sb->s_mmp_update_interval = intv;
+			ext2fs_mark_super_dirty(fs);
+		} else if (!strcmp(token, "force_fsck")) {
+			sb->s_state |= EXT2_ERROR_FS;
+			printf(_("Setting filesystem error flag to force fsck.\n"));
+			ext2fs_mark_super_dirty(fs);
+		} else if (!strcmp(token, "test_fs")) {
+			sb->s_flags |= EXT2_FLAGS_TEST_FILESYS;
+			printf("Setting test filesystem flag\n");
+			ext2fs_mark_super_dirty(fs);
+		} else if (!strcmp(token, "^test_fs")) {
+			sb->s_flags &= ~EXT2_FLAGS_TEST_FILESYS;
+			printf("Clearing test filesystem flag\n");
+			ext2fs_mark_super_dirty(fs);
+		} else if (strcmp(token, "stride") == 0) {
+			if (!arg) {
+				r_usage++;
+				continue;
+			}
+			stride = strtoul(arg, &p, 0);
+			if (*p) {
+				fprintf(stderr,
+					_("Invalid RAID stride: %s\n"),
+					arg);
+				r_usage++;
+				continue;
+			}
+			stride_set = 1;
+		} else if (strcmp(token, "stripe-width") == 0 ||
+			   strcmp(token, "stripe_width") == 0) {
+			if (!arg) {
+				r_usage++;
+				continue;
+			}
+			stripe_width = strtoul(arg, &p, 0);
+			if (*p) {
+				fprintf(stderr,
+					_("Invalid RAID stripe-width: %s\n"),
+					arg);
+				r_usage++;
+				continue;
+			}
+			stripe_width_set = 1;
+		} else if (strcmp(token, "hash_alg") == 0 ||
+			   strcmp(token, "hash-alg") == 0) {
+			if (!arg) {
+				r_usage++;
+				continue;
+			}
+			hash_alg = e2p_string2hash(arg);
+			if (hash_alg < 0) {
+				fprintf(stderr,
+					_("Invalid hash algorithm: %s\n"),
+					arg);
+				r_usage++;
+				continue;
+			}
+			sb->s_def_hash_version = hash_alg;
+			printf(_("Setting default hash algorithm "
+				 "to %s (%d)\n"),
+			       arg, hash_alg);
+			ext2fs_mark_super_dirty(fs);
+		} else if (!strcmp(token, "mount_opts")) {
+			if (!arg) {
+				r_usage++;
+				continue;
+			}
+			if (strlen(arg) >= sizeof(fs->super->s_mount_opts)) {
+				fprintf(stderr,
+					"Extended mount options too long\n");
+				continue;
+			}
+			ext_mount_opts = strdup(arg);
+		} else if (!strcmp(token, "encoding")) {
+			if (!arg) {
+				r_usage++;
+				continue;
+			}
+			if (mount_flags & EXT2_MF_MOUNTED) {
+				fputs(_("The casefold feature may only be enabled when "
+					"the filesystem is unmounted.\n"), stderr);
+				r_usage++;
+				continue;
+			}
+			if (ext2fs_has_feature_casefold(sb) && !enabling_casefold) {
+				fprintf(stderr, _("Cannot alter existing encoding\n"));
+				r_usage++;
+				continue;
+			}
+			encoding = e2p_str2encoding(arg);
+			if (encoding < 0) {
+				fprintf(stderr, _("Invalid encoding: %s\n"), arg);
+				r_usage++;
+				continue;
+			}
+			enabling_casefold = 1;
+			sb->s_encoding = encoding;
+			printf(_("Setting encoding to '%s'\n"), arg);
+			sb->s_encoding_flags =
+				e2p_get_encoding_flags(sb->s_encoding);
+		} else if (!strcmp(token, "encoding_flags")) {
+			if (!arg) {
+				r_usage++;
+				continue;
+			}
+			encoding_flags = arg;
+		} else if (!strcmp(token, "orphan_file_size")) {
+			if (!arg) {
+				r_usage++;
+				continue;
+			}
+			orphan_file_blocks = parse_num_blocks2(arg,
+						 fs->super->s_log_block_size);
+
+			if (orphan_file_blocks < 1) {
+				fprintf(stderr,
+					_("Invalid size of orphan file %s\n"),
+					arg);
+				r_usage++;
+				continue;
+			}
+		} else
+			r_usage++;
+	}
+
+	if (encoding > 0 && !r_usage) {
+		sb->s_encoding_flags =
+			e2p_get_encoding_flags(sb->s_encoding);
+
+		if (encoding_flags &&
+		    e2p_str2encoding_flags(sb->s_encoding, encoding_flags,
+					   &sb->s_encoding_flags)) {
+			fprintf(stderr, _("error: Invalid encoding flag: %s\n"),
+					encoding_flags);
+			r_usage++;
+		} else if (encoding_flags)
+			printf(_("Setting encoding_flags to '%s'\n"),
+				 encoding_flags);
+		ext2fs_set_feature_casefold(sb);
+		ext2fs_mark_super_dirty(fs);
+	} else if (encoding_flags && !r_usage) {
+		fprintf(stderr, _("error: An encoding must be explicitly "
+				  "specified when passing encoding-flags\n"));
+		r_usage++;
+	}
+	if (r_usage) {
+		fprintf(stderr, "%s", _("\nBad options specified.\n\n"
+			"Extended options are separated by commas, "
+			"and may take an argument which\n"
+			"\tis set off by an equals ('=') sign.\n\n"
+			"Valid extended options are:\n"
+			"\tclear_mmp\n"
+			"\thash_alg=<hash algorithm>\n"
+			"\tmount_opts=<extended default mount options>\n"
+			"\tmmp_update_interval=<mmp update interval in seconds>\n"
+			"\tstride=<RAID per-disk chunk size in blocks>\n"
+			"\tstripe_width=<RAID stride*data disks in blocks>\n"
+			"\tforce_fsck\n"
+			"\ttest_fs\n"
+			"\t^test_fs\n"
+			"\tencoding=<encoding>\n"
+			"\tencoding_flags=<flags>\n"));
+		free(buf);
+		return 1;
+	}
+	free(buf);
+
+	return 0;
+}
+
+/*
+ * Fill in the block bitmap bmap with the information regarding the
+ * blocks to be moved
+ */
+static int get_move_bitmaps(ext2_filsys fs, int new_ino_blks_per_grp,
+			    ext2fs_block_bitmap bmap)
+{
+	dgrp_t i;
+	int retval;
+	ext2_badblocks_list bb_list = 0;
+	blk64_t j, needed_blocks = 0;
+	blk64_t start_blk, end_blk;
+
+	retval = ext2fs_read_bb_inode(fs, &bb_list);
+	if (retval)
+		return retval;
+
+	for (i = 0; i < fs->group_desc_count; i++) {
+		start_blk = ext2fs_inode_table_loc(fs, i) +
+					fs->inode_blocks_per_group;
+
+		end_blk = ext2fs_inode_table_loc(fs, i) +
+					new_ino_blks_per_grp;
+
+		for (j = start_blk; j < end_blk; j++) {
+			if (ext2fs_test_block_bitmap2(fs->block_map, j)) {
+				/*
+				 * IF the block is a bad block we fail
+				 */
+				if (ext2fs_badblocks_list_test(bb_list, j)) {
+					ext2fs_badblocks_list_free(bb_list);
+					return ENOSPC;
+				}
+
+				ext2fs_mark_block_bitmap2(bmap, j);
+			} else {
+				/*
+				 * We are going to use this block for
+				 * inode table. So mark them used.
+				 */
+				ext2fs_mark_block_bitmap2(fs->block_map, j);
+			}
+		}
+		needed_blocks += end_blk - start_blk;
+	}
+
+	ext2fs_badblocks_list_free(bb_list);
+	if (needed_blocks > ext2fs_free_blocks_count(fs->super))
+		return ENOSPC;
+
+	return 0;
+}
+
+static int ext2fs_is_meta_block(ext2_filsys fs, blk64_t blk)
+{
+	dgrp_t group;
+	group = ext2fs_group_of_blk2(fs, blk);
+	if (ext2fs_block_bitmap_loc(fs, group) == blk)
+		return 1;
+	if (ext2fs_inode_bitmap_loc(fs, group) == blk)
+		return 1;
+	return 0;
+}
+
+static int ext2fs_is_block_in_group(ext2_filsys fs, dgrp_t group, blk64_t blk)
+{
+	blk64_t start_blk, end_blk;
+	start_blk = fs->super->s_first_data_block +
+			EXT2_GROUPS_TO_BLOCKS(fs->super, group);
+	/*
+	 * We cannot get new block beyond end_blk for for the last block group
+	 * so we can check with EXT2_BLOCKS_PER_GROUP even for last block group
+	 */
+	end_blk   = start_blk + EXT2_BLOCKS_PER_GROUP(fs->super);
+	if (blk >= start_blk && blk <= end_blk)
+		return 1;
+	return 0;
+}
+
+static int move_block(ext2_filsys fs, ext2fs_block_bitmap bmap)
+{
+
+	char *buf;
+	dgrp_t group = 0;
+	errcode_t retval;
+	int meta_data = 0;
+	blk64_t blk, new_blk, goal;
+	struct blk_move *bmv;
+
+	retval = ext2fs_get_mem(fs->blocksize, &buf);
+	if (retval)
+		return retval;
+
+	for (new_blk = blk = fs->super->s_first_data_block;
+	     blk < ext2fs_blocks_count(fs->super); blk++) {
+		if (!ext2fs_test_block_bitmap2(bmap, blk))
+			continue;
+
+		if (ext2fs_is_meta_block(fs, blk)) {
+			/*
+			 * If the block is mapping a fs meta data block
+			 * like group desc/block bitmap/inode bitmap. We
+			 * should find a block in the same group and fix
+			 * the respective fs metadata pointers. Otherwise
+			 * fail
+			 */
+			group = ext2fs_group_of_blk2(fs, blk);
+			goal = ext2fs_group_first_block2(fs, group);
+			meta_data = 1;
+
+		} else {
+			goal = new_blk;
+		}
+		retval = ext2fs_new_block2(fs, goal, NULL, &new_blk);
+		if (retval)
+			goto err_out;
+
+		/* new fs meta data block should be in the same group */
+		if (meta_data && !ext2fs_is_block_in_group(fs, group, new_blk)) {
+			retval = ENOSPC;
+			goto err_out;
+		}
+
+		/* Mark this block as allocated */
+		ext2fs_mark_block_bitmap2(fs->block_map, new_blk);
+
+		/* Add it to block move list */
+		retval = ext2fs_get_mem(sizeof(struct blk_move), &bmv);
+		if (retval)
+			goto err_out;
+
+		bmv->old_loc = blk;
+		bmv->new_loc = new_blk;
+
+		list_add(&(bmv->list), &blk_move_list);
+
+		retval = io_channel_read_blk64(fs->io, blk, 1, buf);
+		if (retval)
+			goto err_out;
+
+		retval = io_channel_write_blk64(fs->io, new_blk, 1, buf);
+		if (retval)
+			goto err_out;
+	}
+
+err_out:
+	ext2fs_free_mem(&buf);
+	return retval;
+}
+
+static blk64_t translate_block(blk64_t blk)
+{
+	struct list_head *entry;
+	struct blk_move *bmv;
+
+	list_for_each(entry, &blk_move_list) {
+		bmv = list_entry(entry, struct blk_move, list);
+		if (bmv->old_loc == blk)
+			return bmv->new_loc;
+	}
+
+	return 0;
+}
+
+static int process_block(ext2_filsys fs EXT2FS_ATTR((unused)),
+			 blk64_t *block_nr,
+			 e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
+			 blk64_t ref_block EXT2FS_ATTR((unused)),
+			 int ref_offset EXT2FS_ATTR((unused)),
+			 void *priv_data)
+{
+	int ret = 0;
+	blk64_t new_blk;
+	ext2fs_block_bitmap bmap = (ext2fs_block_bitmap) priv_data;
+
+	if (!ext2fs_test_block_bitmap2(bmap, *block_nr))
+		return 0;
+	new_blk = translate_block(*block_nr);
+	if (new_blk) {
+		*block_nr = new_blk;
+		/*
+		 * This will force the ext2fs_write_inode in the iterator
+		 */
+		ret |= BLOCK_CHANGED;
+	}
+
+	return ret;
+}
+
+static int inode_scan_and_fix(ext2_filsys fs, ext2fs_block_bitmap bmap)
+{
+	errcode_t retval = 0;
+	ext2_ino_t ino;
+	blk64_t blk;
+	char *block_buf = 0;
+	struct ext2_inode inode;
+	ext2_inode_scan	scan = NULL;
+
+	retval = ext2fs_get_mem(fs->blocksize * 3, &block_buf);
+	if (retval)
+		return retval;
+
+	retval = ext2fs_open_inode_scan(fs, 0, &scan);
+	if (retval)
+		goto err_out;
+
+	while (1) {
+		retval = ext2fs_get_next_inode(scan, &ino, &inode);
+		if (retval)
+			goto err_out;
+
+		if (!ino)
+			break;
+
+		if (inode.i_links_count == 0)
+			continue; /* inode not in use */
+
+		/* FIXME!!
+		 * If we end up modifying the journal inode
+		 * the sb->s_jnl_blocks will differ. But a
+		 * subsequent e2fsck fixes that.
+		 * Do we need to fix this ??
+		 */
+
+		if (ext2fs_file_acl_block(fs, &inode) &&
+		    ext2fs_test_block_bitmap2(bmap,
+					ext2fs_file_acl_block(fs, &inode))) {
+			blk = translate_block(ext2fs_file_acl_block(fs,
+								    &inode));
+			if (!blk)
+				continue;
+
+			ext2fs_file_acl_block_set(fs, &inode, blk);
+
+			/*
+			 * Write the inode to disk so that inode table
+			 * resizing can work
+			 */
+			retval = ext2fs_write_inode(fs, ino, &inode);
+			if (retval)
+				goto err_out;
+		}
+
+		if (!ext2fs_inode_has_valid_blocks2(fs, &inode))
+			continue;
+
+		retval = ext2fs_block_iterate3(fs, ino, 0, block_buf,
+					       process_block, bmap);
+		if (retval)
+			goto err_out;
+
+	}
+
+err_out:
+	ext2fs_free_mem(&block_buf);
+	ext2fs_close_inode_scan(scan);
+
+	return retval;
+}
+
+/*
+ * We need to scan for inode and block bitmaps that may need to be
+ * moved.  This can take place if the filesystem was formatted for
+ * RAID arrays using the mke2fs's extended option "stride".
+ */
+static int group_desc_scan_and_fix(ext2_filsys fs, ext2fs_block_bitmap bmap)
+{
+	dgrp_t i;
+	blk64_t blk, new_blk;
+
+	for (i = 0; i < fs->group_desc_count; i++) {
+		blk = ext2fs_block_bitmap_loc(fs, i);
+		if (ext2fs_test_block_bitmap2(bmap, blk)) {
+			new_blk = translate_block(blk);
+			if (!new_blk)
+				continue;
+			ext2fs_block_bitmap_loc_set(fs, i, new_blk);
+		}
+
+		blk = ext2fs_inode_bitmap_loc(fs, i);
+		if (ext2fs_test_block_bitmap2(bmap, blk)) {
+			new_blk = translate_block(blk);
+			if (!new_blk)
+				continue;
+			ext2fs_inode_bitmap_loc_set(fs, i, new_blk);
+		}
+	}
+	return 0;
+}
+
+static int expand_inode_table(ext2_filsys fs, unsigned long new_ino_size)
+{
+	dgrp_t i;
+	blk64_t blk;
+	errcode_t retval;
+	int new_ino_blks_per_grp;
+	unsigned int j;
+	char *old_itable = NULL, *new_itable = NULL;
+	char *tmp_old_itable = NULL, *tmp_new_itable = NULL;
+	unsigned long old_ino_size;
+	int old_itable_size, new_itable_size;
+
+	old_itable_size = fs->inode_blocks_per_group * fs->blocksize;
+	old_ino_size = EXT2_INODE_SIZE(fs->super);
+
+	new_ino_blks_per_grp = ext2fs_div_ceil(
+					EXT2_INODES_PER_GROUP(fs->super) *
+					new_ino_size,
+					fs->blocksize);
+
+	new_itable_size = new_ino_blks_per_grp * fs->blocksize;
+
+	retval = ext2fs_get_mem(old_itable_size, &old_itable);
+	if (retval)
+		return retval;
+
+	retval = ext2fs_get_mem(new_itable_size, &new_itable);
+	if (retval)
+		goto err_out;
+
+	tmp_old_itable = old_itable;
+	tmp_new_itable = new_itable;
+
+	for (i = 0; i < fs->group_desc_count; i++) {
+		blk = ext2fs_inode_table_loc(fs, i);
+		retval = io_channel_read_blk64(fs->io, blk,
+				fs->inode_blocks_per_group, old_itable);
+		if (retval)
+			goto err_out;
+
+		for (j = 0; j < EXT2_INODES_PER_GROUP(fs->super); j++) {
+			memcpy(new_itable, old_itable, old_ino_size);
+
+			memset(new_itable+old_ino_size, 0,
+					new_ino_size - old_ino_size);
+
+			new_itable += new_ino_size;
+			old_itable += old_ino_size;
+		}
+
+		/* reset the pointer */
+		old_itable = tmp_old_itable;
+		new_itable = tmp_new_itable;
+
+		retval = io_channel_write_blk64(fs->io, blk,
+					new_ino_blks_per_grp, new_itable);
+		if (retval)
+			goto err_out;
+	}
+
+	/* Update the meta data */
+	fs->inode_blocks_per_group = new_ino_blks_per_grp;
+	ext2fs_free_inode_cache(fs->icache);
+	fs->icache = 0;
+	fs->super->s_inode_size = new_ino_size;
+
+err_out:
+	if (old_itable)
+		ext2fs_free_mem(&old_itable);
+
+	if (new_itable)
+		ext2fs_free_mem(&new_itable);
+
+	return retval;
+}
+
+
+#define list_for_each_safe(pos, pnext, head) \
+	for (pos = (head)->next, pnext = pos->next; pos != (head); \
+	     pos = pnext, pnext = pos->next)
+
+static void free_blk_move_list(void)
+{
+	struct list_head *entry, *tmp;
+	struct blk_move *bmv;
+
+	list_for_each_safe(entry, tmp, &blk_move_list) {
+		bmv = list_entry(entry, struct blk_move, list);
+		list_del(entry);
+		ext2fs_free_mem(&bmv);
+	}
+	return;
+}
+
+static int resize_inode(ext2_filsys fs, unsigned long new_size)
+{
+	errcode_t retval;
+	int new_ino_blks_per_grp;
+	ext2fs_block_bitmap bmap;
+
+	retval = ext2fs_read_inode_bitmap(fs);
+	if (retval) {
+		fputs(_("Failed to read inode bitmap\n"), stderr);
+		return retval;
+	}
+	retval = ext2fs_read_block_bitmap(fs);
+	if (retval) {
+		fputs(_("Failed to read block bitmap\n"), stderr);
+		return retval;
+	}
+	INIT_LIST_HEAD(&blk_move_list);
+
+
+	new_ino_blks_per_grp = ext2fs_div_ceil(
+					EXT2_INODES_PER_GROUP(fs->super)*
+					new_size,
+					fs->blocksize);
+
+	/* We may change the file system.
+	 * Mark the file system as invalid so that
+	 * the user is prompted to run fsck.
+	 */
+	fs->super->s_state &= ~EXT2_VALID_FS;
+
+	retval = ext2fs_allocate_block_bitmap(fs, _("blocks to be moved"),
+						&bmap);
+	if (retval) {
+		fputs(_("Failed to allocate block bitmap when "
+				"increasing inode size\n"), stderr);
+		return retval;
+	}
+	retval = get_move_bitmaps(fs, new_ino_blks_per_grp, bmap);
+	if (retval) {
+		fputs(_("Not enough space to increase inode size \n"), stderr);
+		goto err_out;
+	}
+	retval = move_block(fs, bmap);
+	if (retval) {
+		fputs(_("Failed to relocate blocks during inode resize \n"),
+		      stderr);
+		goto err_out;
+	}
+	retval = inode_scan_and_fix(fs, bmap);
+	if (retval)
+		goto err_out_undo;
+
+	retval = group_desc_scan_and_fix(fs, bmap);
+	if (retval)
+		goto err_out_undo;
+
+	retval = expand_inode_table(fs, new_size);
+	if (retval)
+		goto err_out_undo;
+
+	ext2fs_calculate_summary_stats(fs, 1 /* super only */);
+
+	fs->super->s_state |= EXT2_VALID_FS;
+	/* mark super block and block bitmap as dirty */
+	ext2fs_mark_super_dirty(fs);
+	ext2fs_mark_bb_dirty(fs);
+
+err_out:
+	free_blk_move_list();
+	ext2fs_free_block_bitmap(bmap);
+
+	return retval;
+
+err_out_undo:
+	free_blk_move_list();
+	ext2fs_free_block_bitmap(bmap);
+	fputs(_("Error in resizing the inode size.\n"
+			"Run e2undo to undo the "
+			"file system changes. \n"), stderr);
+
+	return retval;
+}
+
+static int tune2fs_setup_tdb(const char *name, io_manager *io_ptr)
+{
+	errcode_t retval = 0;
+	const char *tdb_dir;
+	char *tdb_file = NULL;
+	char *dev_name, *tmp_name;
+
+	/* (re)open a specific undo file */
+	if (undo_file && undo_file[0] != 0) {
+		retval = set_undo_io_backing_manager(*io_ptr);
+		if (retval)
+			goto err;
+		*io_ptr = undo_io_manager;
+		retval = set_undo_io_backup_file(undo_file);
+		if (retval)
+			goto err;
+		printf(_("Overwriting existing filesystem; this can be undone "
+			 "using the command:\n"
+			 "    e2undo %s %s\n\n"),
+			 undo_file, name);
+		return retval;
+	}
+
+	/*
+	 * Configuration via a conf file would be
+	 * nice
+	 */
+	tdb_dir = getenv("E2FSPROGS_UNDO_DIR");
+	if (!tdb_dir)
+		tdb_dir = "/var/lib/e2fsprogs";
+
+	if (!strcmp(tdb_dir, "none") || (tdb_dir[0] == 0) ||
+	    access(tdb_dir, W_OK))
+		return 0;
+
+	tmp_name = strdup(name);
+	if (!tmp_name)
+		goto errout;
+	dev_name = basename(tmp_name);
+	tdb_file = malloc(strlen(tdb_dir) + 9 + strlen(dev_name) + 7 + 1);
+	if (!tdb_file) {
+		free(tmp_name);
+		goto errout;
+	}
+	sprintf(tdb_file, "%s/tune2fs-%s.e2undo", tdb_dir, dev_name);
+	free(tmp_name);
+
+	if ((unlink(tdb_file) < 0) && (errno != ENOENT)) {
+		retval = errno;
+		com_err(program_name, retval,
+			_("while trying to delete %s"), tdb_file);
+		goto errout;
+	}
+
+	retval = set_undo_io_backing_manager(*io_ptr);
+	if (retval)
+		goto errout;
+	*io_ptr = undo_io_manager;
+	retval = set_undo_io_backup_file(tdb_file);
+	if (retval)
+		goto errout;
+	printf(_("Overwriting existing filesystem; this can be undone "
+		 "using the command:\n"
+		 "    e2undo %s %s\n\n"),
+		 tdb_file, name);
+
+	free(tdb_file);
+	return 0;
+errout:
+	free(tdb_file);
+err:
+	com_err("tune2fs", retval, "while trying to setup undo file\n");
+	return retval;
+}
+
+static int
+fs_update_journal_user(struct ext2_super_block *sb, __u8 old_uuid[UUID_SIZE])
+{
+	int retval, nr_users, start;
+	journal_superblock_t *jsb;
+	ext2_filsys jfs;
+	__u8 *j_uuid;
+	char *journal_path;
+	char uuid[UUID_STR_SIZE];
+	char buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
+
+	if (!ext2fs_has_feature_journal(sb) || uuid_is_null(sb->s_journal_uuid))
+		return 0;
+
+	uuid_unparse(sb->s_journal_uuid, uuid);
+	journal_path = blkid_get_devname(NULL, "UUID", uuid);
+	if (!journal_path)
+		return 0;
+
+	retval = ext2fs_open2(journal_path, io_options,
+			      EXT2_FLAG_JOURNAL_DEV_OK | EXT2_FLAG_RW,
+			      0, 0, unix_io_manager, &jfs);
+	if (retval) {
+		com_err(program_name, retval,
+			_("while trying to open %s"),
+			journal_path);
+		return retval;
+	}
+
+	retval = get_journal_sb(jfs, buf);
+	if (retval != 0) {
+		if (retval == EXT2_ET_UNSUPP_FEATURE)
+			fprintf(stderr, _("%s is not a journal device.\n"),
+				journal_path);
+		return retval;
+	}
+
+	jsb = (journal_superblock_t *) buf;
+	/* Find the filesystem UUID */
+	nr_users = ntohl(jsb->s_nr_users);
+	if (nr_users > JBD2_USERS_MAX) {
+		fprintf(stderr, _("Journal superblock is corrupted, nr_users\n"
+				 "is too high (%d).\n"), nr_users);
+		return EXT2_ET_CORRUPT_JOURNAL_SB;
+	}
+
+	j_uuid = journal_user(old_uuid, jsb->s_users, nr_users);
+	if (j_uuid == NULL) {
+		fputs(_("Filesystem's UUID not found on journal device.\n"),
+		      stderr);
+		return EXT2_ET_LOAD_EXT_JOURNAL;
+	}
+
+	memcpy(j_uuid, sb->s_uuid, UUID_SIZE);
+
+	start = ext2fs_journal_sb_start(jfs->blocksize);
+	/* Write back the journal superblock */
+	retval = io_channel_write_blk64(jfs->io, start, -SUPERBLOCK_SIZE, buf);
+	if (retval != 0) {
+		com_err(program_name, retval,
+			"while writing journal superblock.");
+		return retval;
+	}
+
+	ext2fs_close(jfs);
+
+	return 0;
+}
+
+/*
+ * Use FS_IOC_SETFSLABEL or FS_IOC_GETFSLABEL to set/get file system label
+ * Return:	0 on success
+ *		1 on error
+ *		-1 when the old method should be used
+ */
+static int handle_fslabel(int setlabel)
+{
+#ifdef __linux__
+	errcode_t ret;
+	int mnt_flags, fd;
+	char label[FSLABEL_MAX];
+	int maxlen = FSLABEL_MAX - 1;
+	char mntpt[PATH_MAX + 1];
+
+	ret = ext2fs_check_mount_point(device_name, &mnt_flags,
+					  mntpt, sizeof(mntpt));
+	if (ret) {
+		com_err(device_name, ret, _("while checking mount status"));
+		return 1;
+	}
+	if (!(mnt_flags & EXT2_MF_MOUNTED) ||
+	    (setlabel && (mnt_flags & EXT2_MF_READONLY)))
+		return -1;
+
+	if (!mntpt[0]) {
+		fprintf(stderr,_("Unknown mount point for %s\n"), device_name);
+		return 1;
+	}
+
+	fd = open(mntpt, O_RDONLY);
+	if (fd < 0) {
+		com_err(mntpt, errno, _("while opening mount point"));
+		return 1;
+	}
+
+	/* Get fs label */
+	if (!setlabel) {
+		if (ioctl(fd, FS_IOC_GETFSLABEL, &label)) {
+			close(fd);
+			if (errno == ENOTTY)
+				return -1;
+			com_err(mntpt, errno, _("while trying to get fs label"));
+			return 1;
+		}
+		close(fd);
+		printf("%.*s\n", EXT2_LEN_STR(label));
+		return 0;
+	}
+
+	/* If it's extN file system, truncate the label to appropriate size */
+	if (mnt_flags & EXT2_MF_EXTFS)
+		maxlen = EXT2_LABEL_LEN;
+	if (strlen(new_label) > maxlen) {
+		fputs(_("Warning: label too long, truncating.\n"),
+		      stderr);
+		new_label[maxlen] = '\0';
+	}
+
+	/* Set fs label */
+	if (ioctl(fd, FS_IOC_SETFSLABEL, new_label)) {
+		close(fd);
+		if (errno == ENOTTY)
+			return -1;
+		com_err(mntpt, errno, _("while trying to set fs label"));
+		return 1;
+	}
+	close(fd);
+	return 0;
+#else
+	return -1;
+#endif
+}
+
+#ifndef BUILD_AS_LIB
+int main(int argc, char **argv)
+#else
+int tune2fs_main(int argc, char **argv)
+#endif  /* BUILD_AS_LIB */
+{
+	errcode_t retval;
+	ext2_filsys fs;
+	struct ext2_super_block *sb;
+	io_manager io_ptr, io_ptr_orig = NULL;
+	int rc = 0;
+	char default_undo_file[1] = { 0 };
+	char mntpt[PATH_MAX + 1] = { 0 };
+	int fd = -1;
+	struct fsuuid *fsuuid = NULL;
+
+#ifdef ENABLE_NLS
+	setlocale(LC_MESSAGES, "");
+	setlocale(LC_CTYPE, "");
+	bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
+	textdomain(NLS_CAT_NAME);
+	set_com_err_gettext(gettext);
+#endif
+	if (argc && *argv)
+		program_name = *argv;
+	else
+		usage();
+	add_error_table(&et_ext2_error_table);
+
+#ifdef CONFIG_BUILD_FINDFS
+	if (strcmp(get_progname(argv[0]), "findfs") == 0)
+		do_findfs(argc, argv);
+#endif
+	if (strcmp(get_progname(argv[0]), "e2label") == 0)
+		parse_e2label_options(argc, argv);
+	else
+		parse_tune2fs_options(argc, argv);
+
+#ifdef CONFIG_TESTIO_DEBUG
+	if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_DEBUG")) {
+		io_ptr = test_io_manager;
+		test_io_backing_manager = unix_io_manager;
+	} else
+#endif
+		io_ptr = unix_io_manager;
+
+	/*
+	 * Try the get/set fs label using ioctls before we even attempt
+	 * to open the file system.
+	 */
+	if (L_flag || print_label) {
+		rc = handle_fslabel(L_flag);
+		if (rc != -1) {
+#ifndef BUILD_AS_LIB
+			exit(rc);
+#endif
+			return rc;
+		}
+		rc = 0;
+	}
+
+retry_open:
+	if ((open_flag & EXT2_FLAG_RW) == 0 || f_flag)
+		open_flag |= EXT2_FLAG_SKIP_MMP;
+
+	open_flag |= EXT2_FLAG_64BITS | EXT2_FLAG_THREADS |
+		EXT2_FLAG_JOURNAL_DEV_OK;
+
+	/* keep the filesystem struct around to dump MMP data */
+	open_flag |= EXT2_FLAG_NOFREE_ON_ERROR;
+
+	retval = ext2fs_open2(device_name, io_options, open_flag,
+			      0, 0, io_ptr, &fs);
+	if (retval) {
+		com_err(program_name, retval,
+			_("while trying to open %s"),
+			device_name);
+		if (retval == EXT2_ET_MMP_FSCK_ON ||
+		    retval == EXT2_ET_MMP_UNKNOWN_SEQ)
+			dump_mmp_msg(fs->mmp_buf,
+				     _("If you are sure the filesystem "
+				       "is not in use on any node, run:\n"
+				       "'tune2fs -f -E clear_mmp {device}'\n"));
+		else if (retval == EXT2_ET_MMP_FAILED)
+			dump_mmp_msg(fs->mmp_buf, NULL);
+		else if (retval == EXT2_ET_MMP_MAGIC_INVALID)
+			fprintf(stderr,
+				_("MMP block magic is bad. Try to fix it by "
+				  "running:\n'e2fsck -f %s'\n"), device_name);
+		else if (retval == EXT2_ET_BAD_MAGIC)
+			check_plausibility(device_name, CHECK_FS_EXIST, NULL);
+		else if (retval != EXT2_ET_MMP_FAILED)
+			fprintf(stderr, "%s",
+			     _("Couldn't find valid filesystem superblock.\n"));
+
+		ext2fs_free(fs);
+		exit(1);
+	}
+	if (ext2fs_has_feature_journal_dev(fs->super)) {
+		fprintf(stderr, "%s", _("Cannot modify a journal device.\n"));
+		ext2fs_free(fs);
+		exit(1);
+	}
+	fs->default_bitmap_type = EXT2FS_BMAP64_RBTREE;
+
+	if (I_flag) {
+		/*
+		 * Check the inode size is right so we can issue an
+		 * error message and bail before setting up the tdb
+		 * file.
+		 */
+		if (new_inode_size == EXT2_INODE_SIZE(fs->super)) {
+			fprintf(stderr, _("The inode size is already %lu\n"),
+				new_inode_size);
+			rc = 1;
+			goto closefs;
+		}
+		if (new_inode_size < EXT2_INODE_SIZE(fs->super)) {
+			fprintf(stderr, "%s",
+				_("Shrinking inode size is not supported\n"));
+			rc = 1;
+			goto closefs;
+		}
+		if (new_inode_size > fs->blocksize) {
+			fprintf(stderr, _("Invalid inode size %lu (max %d)\n"),
+				new_inode_size, fs->blocksize);
+			rc = 1;
+			goto closefs;
+		}
+		rc = check_fsck_needed(fs,
+			_("Resizing inodes could take some time."));
+		if (rc)
+			goto closefs;
+		/*
+		 * If inode resize is requested use the
+		 * Undo I/O manager
+		 */
+		undo_file = default_undo_file;
+	}
+
+	/* Set up an undo file */
+	if (undo_file && io_ptr_orig == NULL) {
+		io_ptr_orig = io_ptr;
+		retval = tune2fs_setup_tdb(device_name, &io_ptr);
+		if (retval) {
+			rc = 1;
+			goto closefs;
+		}
+		if (io_ptr != io_ptr_orig) {
+			ext2fs_close_free(&fs);
+			goto retry_open;
+		}
+	}
+
+	sb = fs->super;
+	fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
+
+	if (print_label) {
+		/* For e2label emulation */
+		printf("%.*s\n", EXT2_LEN_STR(sb->s_volume_name));
+		remove_error_table(&et_ext2_error_table);
+		goto closefs;
+	}
+
+	retval = ext2fs_check_mount_point(device_name, &mount_flags,
+					mntpt, sizeof(mntpt));
+	if (retval) {
+		com_err("ext2fs_check_mount_point", retval,
+			_("while determining whether %s is mounted."),
+			device_name);
+		rc = 1;
+		goto closefs;
+	}
+
+#ifdef NO_RECOVERY
+	/* Warn if file system needs recovery and it is opened for writing. */
+	if ((open_flag & EXT2_FLAG_RW) && !(mount_flags & EXT2_MF_MOUNTED) &&
+	    (sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) &&
+	    (sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER)) {
+		fprintf(stderr,
+_("Warning: The journal is dirty. You may wish to replay the journal like:\n\n"
+  "\te2fsck -E journal_only %s\n\n"
+  "then rerun this command.  Otherwise, any changes made may be overwritten\n"
+  "by journal recovery.\n"), device_name);
+	}
+#else
+	/* Recover the journal if possible. */
+	if ((open_flag & EXT2_FLAG_RW) && !(mount_flags & (EXT2_MF_BUSY | EXT2_MF_MOUNTED)) &&
+	    ext2fs_has_feature_journal_needs_recovery(fs->super)) {
+		printf(_("Recovering journal.\n"));
+		retval = ext2fs_run_ext3_journal(&fs);
+		if (retval) {
+			com_err("tune2fs", retval,
+				"while recovering journal.\n");
+			printf(_("Please run e2fsck -fy %s.\n"), device_name);
+			if (!fs)
+				exit(1);
+			rc = 1;
+			goto closefs;
+		}
+		sb = fs->super;
+	}
+#endif
+
+	/* Normally we only need to write out the superblock */
+	fs->flags |= EXT2_FLAG_SUPER_ONLY;
+
+	if (c_flag) {
+		if (max_mount_count == 65536)
+			max_mount_count = EXT2_DFL_MAX_MNT_COUNT +
+				(random() % EXT2_DFL_MAX_MNT_COUNT);
+		sb->s_max_mnt_count = max_mount_count;
+		ext2fs_mark_super_dirty(fs);
+		printf(_("Setting maximal mount count to %d\n"),
+		       max_mount_count);
+	}
+	if (C_flag) {
+		sb->s_mnt_count = mount_count;
+		ext2fs_mark_super_dirty(fs);
+		printf(_("Setting current mount count to %d\n"), mount_count);
+	}
+	if (e_flag) {
+		sb->s_errors = errors;
+		ext2fs_mark_super_dirty(fs);
+		printf(_("Setting error behavior to %d\n"), errors);
+	}
+	if (g_flag) {
+		sb->s_def_resgid = resgid;
+		ext2fs_mark_super_dirty(fs);
+		printf(_("Setting reserved blocks gid to %lu\n"), resgid);
+	}
+	if (i_flag) {
+		if ((unsigned long long)interval >= (1ULL << 32)) {
+			com_err(program_name, 0,
+				_("interval between checks is too big (%lu)"),
+				interval);
+			rc = 1;
+			goto closefs;
+		}
+		sb->s_checkinterval = interval;
+		ext2fs_mark_super_dirty(fs);
+		printf(_("Setting interval between checks to %lu seconds\n"),
+		       interval);
+	}
+	if (m_flag) {
+		ext2fs_r_blocks_count_set(sb, reserved_ratio *
+					  ext2fs_blocks_count(sb) / 100.0);
+		ext2fs_mark_super_dirty(fs);
+		printf (_("Setting reserved blocks percentage to %g%% (%llu blocks)\n"),
+			reserved_ratio,
+			(unsigned long long) ext2fs_r_blocks_count(sb));
+	}
+	if (r_flag) {
+		if (reserved_blocks > ext2fs_blocks_count(sb)/2) {
+			com_err(program_name, 0,
+				_("reserved blocks count is too big (%llu)"),
+				(unsigned long long) reserved_blocks);
+			rc = 1;
+			goto closefs;
+		}
+		ext2fs_r_blocks_count_set(sb, reserved_blocks);
+		ext2fs_mark_super_dirty(fs);
+		printf(_("Setting reserved blocks count to %llu\n"),
+		       (unsigned long long) reserved_blocks);
+	}
+	if (s_flag == 1) {
+		if (ext2fs_has_feature_sparse_super(sb)) {
+			fputs(_("\nThe filesystem already has sparse "
+				"superblocks.\n"), stderr);
+		} else if (ext2fs_has_feature_meta_bg(sb)) {
+			fputs(_("\nSetting the sparse superblock flag not "
+				"supported\nfor filesystems with "
+				"the meta_bg feature enabled.\n"),
+				stderr);
+			rc = 1;
+			goto closefs;
+		} else {
+			ext2fs_set_feature_sparse_super(sb);
+			sb->s_state &= ~EXT2_VALID_FS;
+			ext2fs_mark_super_dirty(fs);
+			printf(_("\nSparse superblock flag set.  %s"),
+			       _(please_fsck));
+		}
+	}
+	if (s_flag == 0) {
+		fputs(_("\nClearing the sparse superblock flag not supported.\n"),
+		      stderr);
+		rc = 1;
+		goto closefs;
+	}
+	if (T_flag) {
+		sb->s_lastcheck = last_check_time;
+		ext2fs_mark_super_dirty(fs);
+		printf(_("Setting time filesystem last checked to %s\n"),
+		       ctime(&last_check_time));
+	}
+	if (u_flag) {
+		sb->s_def_resuid = resuid;
+		ext2fs_mark_super_dirty(fs);
+		printf(_("Setting reserved blocks uid to %lu\n"), resuid);
+	}
+	if (L_flag) {
+		if (strlen(new_label) > sizeof(sb->s_volume_name))
+			fputs(_("Warning: label too long, truncating.\n"),
+			      stderr);
+		memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name));
+		strncpy((char *)sb->s_volume_name, new_label,
+			sizeof(sb->s_volume_name));
+		ext2fs_mark_super_dirty(fs);
+	}
+	if (M_flag) {
+		memset(sb->s_last_mounted, 0, sizeof(sb->s_last_mounted));
+		strncpy((char *)sb->s_last_mounted, new_last_mounted,
+			sizeof(sb->s_last_mounted));
+		ext2fs_mark_super_dirty(fs);
+	}
+	if (mntopts_cmd) {
+		rc = update_mntopts(fs, mntopts_cmd);
+		if (rc)
+			goto closefs;
+	}
+	if (features_cmd) {
+		rc = update_feature_set(fs, features_cmd);
+		if (rc)
+			goto closefs;
+	}
+	if (extended_cmd) {
+		rc = parse_extended_opts(fs, extended_cmd);
+		if (rc)
+			goto closefs;
+		if (clear_mmp && !f_flag) {
+			fputs(_("Error in using clear_mmp. "
+				"It must be used with -f\n"),
+			      stderr);
+			rc = 1;
+			goto closefs;
+		}
+	}
+	if (clear_mmp) {
+		rc = ext2fs_mmp_clear(fs);
+		goto closefs;
+	}
+	if (journal_size || journal_device) {
+		rc = add_journal(fs);
+		if (rc)
+			goto closefs;
+	}
+	if (orphan_file_blocks) {
+		errcode_t err;
+
+		err = ext2fs_read_bitmaps(fs);
+		if (err) {
+			com_err(program_name, err, "%s",
+				_("while loading bitmaps"));
+			rc = 1;
+			goto closefs;
+		}
+		err = ext2fs_create_orphan_file(fs, orphan_file_blocks);
+		if (err) {
+			com_err(program_name, err, "%s",
+				_("while creating orphan file"));
+			rc = 1;
+			goto closefs;
+		}
+	}
+
+	if (Q_flag) {
+		if (mount_flags & EXT2_MF_MOUNTED) {
+			fputs(_("The quota feature may only be changed when "
+				"the filesystem is unmounted.\n"), stderr);
+			rc = 1;
+			goto closefs;
+		}
+		rc = handle_quota_options(fs);
+		if (rc)
+			goto closefs;
+	}
+
+	if (U_flag) {
+		int set_csum = 0;
+		dgrp_t i;
+		char buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
+		__u8 old_uuid[UUID_SIZE];
+		uuid_t new_uuid;
+		errcode_t ret = -1;
+
+		if (ext2fs_has_feature_stable_inodes(fs->super)) {
+			fputs(_("Cannot change the UUID of this filesystem "
+				"because it has the stable_inodes feature "
+				"flag.\n"), stderr);
+			exit(1);
+		}
+
+		if (!ext2fs_has_feature_csum_seed(fs->super) &&
+		    (ext2fs_has_feature_metadata_csum(fs->super) ||
+		     ext2fs_has_feature_ea_inode(fs->super))) {
+			rc = check_fsck_needed(fs,
+				_("Setting the UUID on this "
+				  "filesystem could take some time."));
+			if (rc)
+				goto closefs;
+			rewrite_checksums = REWRITE_ALL;
+		}
+
+		if (ext2fs_has_group_desc_csum(fs)) {
+			/*
+			 * Changing the UUID on a metadata_csum FS requires
+			 * rewriting all metadata, which can race with a
+			 * mounted fs.  Don't allow that unless we're saving
+			 * the checksum seed.
+			 */
+			if ((mount_flags & EXT2_MF_MOUNTED) &&
+			    !ext2fs_has_feature_csum_seed(fs->super) &&
+			    ext2fs_has_feature_metadata_csum(fs->super)) {
+				fputs(_("The UUID may only be "
+					"changed when the filesystem is "
+					"unmounted.\n"), stderr);
+				fputs(_("If you only use kernels newer than "
+					"v4.4, run 'tune2fs -O "
+					"metadata_csum_seed' and re-run this "
+					"command.\n"), stderr);
+				try_confirm_csum_seed_support();
+				rc = 1;
+				goto closefs;
+			}
+
+			/*
+			 * Determine if the block group checksums are
+			 * correct so we know whether or not to set
+			 * them later on.
+			 */
+			for (i = 0; i < fs->group_desc_count; i++)
+				if (!ext2fs_group_desc_csum_verify(fs, i))
+					break;
+			if (i >= fs->group_desc_count)
+				set_csum = 1;
+		}
+
+#ifdef __linux__
+		if ((mount_flags & EXT2_MF_MOUNTED) &&
+		    !(mount_flags & EXT2_MF_READONLY) && mntpt[0]) {
+			fd = open(mntpt, O_RDONLY);
+			if (fd >= 0)
+				fsuuid = malloc(sizeof(*fsuuid) + UUID_SIZE);
+			if (fsuuid) {
+				fsuuid->fsu_len = UUID_SIZE;
+				fsuuid->fsu_flags = 0;
+				ret = ioctl(fd, EXT4_IOC_GETFSUUID, fsuuid);
+				if (ret || fsuuid->fsu_len != UUID_SIZE) {
+					free(fsuuid);
+					fsuuid = NULL;
+				}
+			}
+		}
+#endif
+
+		memcpy(old_uuid, fsuuid ? fsuuid->fsu_uuid : sb->s_uuid,
+		       UUID_SIZE);
+		if ((strcasecmp(requested_uuid, "null") == 0) ||
+		    (strcasecmp(requested_uuid, "clear") == 0)) {
+			uuid_clear(new_uuid);
+		} else if (strcasecmp(requested_uuid, "time") == 0) {
+			uuid_generate_time(new_uuid);
+		} else if (strcasecmp(requested_uuid, "random") == 0) {
+			uuid_generate(new_uuid);
+		} else if (uuid_parse(requested_uuid, new_uuid)) {
+			com_err(program_name, 0, "%s",
+				_("Invalid UUID format\n"));
+			rc = 1;
+			goto closefs;
+		}
+
+		ret = -1;
+#ifdef __linux__
+		if (fsuuid) {
+			fsuuid->fsu_len = UUID_SIZE;
+			fsuuid->fsu_flags = 0;
+			memcpy(&fsuuid->fsu_uuid, new_uuid, UUID_SIZE);
+			ret = ioctl(fd, EXT4_IOC_SETFSUUID, fsuuid);
+		}
+#endif
+		/*
+		 * If we can't set the UUID via the ioctl, fall
+		 * back to directly modifying the superblock
+		 .*/
+		if (ret) {
+			memcpy(sb->s_uuid, new_uuid, UUID_SIZE);
+			ext2fs_init_csum_seed(fs);
+			if (set_csum) {
+				for (i = 0; i < fs->group_desc_count; i++)
+					ext2fs_group_desc_csum_set(fs, i);
+				fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
+			}
+			ext2fs_mark_super_dirty(fs);
+		}
+
+		/* If this is a journal dev, we need to copy UUID into jsb */
+		if (!(rc = get_journal_sb(fs, buf))) {
+			journal_superblock_t *jsb;
+
+			jsb = (journal_superblock_t *) buf;
+			fputs(_("Need to update journal superblock.\n"), stdout);
+			memcpy(jsb->s_uuid, sb->s_uuid, sizeof(sb->s_uuid));
+
+			/* Writeback the journal superblock */
+			if ((rc = io_channel_write_blk64(fs->io,
+				ext2fs_journal_sb_start(fs->blocksize),
+					-SUPERBLOCK_SIZE, buf)))
+				goto closefs;
+		} else if (rc != EXT2_ET_UNSUPP_FEATURE)
+			goto closefs;
+		else {
+			rc = 0; /** Reset rc to avoid ext2fs_mmp_stop() */
+
+			if ((rc = fs_update_journal_user(sb, old_uuid)))
+				goto closefs;
+		}
+	}
+
+	if (I_flag) {
+		if (mount_flags & EXT2_MF_MOUNTED) {
+			fputs(_("The inode size may only be "
+				"changed when the filesystem is "
+				"unmounted.\n"), stderr);
+			rc = 1;
+			goto closefs;
+		}
+		if (ext2fs_has_feature_flex_bg(fs->super)) {
+			fputs(_("Changing the inode size not supported for "
+				"filesystems with the flex_bg\n"
+				"feature enabled.\n"),
+			      stderr);
+			rc = 1;
+			goto closefs;
+		}
+		/*
+		 * We want to update group descriptor also
+		 * with the new free inode count
+		 */
+		if (rewrite_checksums)
+			fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
+		fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
+		retval = resize_inode(fs, new_inode_size);
+		if (rewrite_checksums)
+			fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
+		if (retval == 0) {
+			printf(_("Setting inode size %lu\n"),
+							new_inode_size);
+			rewrite_checksums = REWRITE_ALL;
+		} else {
+			printf("%s", _("Failed to change inode size\n"));
+			rc = 1;
+			goto closefs;
+		}
+	}
+
+	if (rewrite_checksums) {
+		retval = rewrite_metadata_checksums(fs, rewrite_checksums);
+		if (retval != 0) {
+			printf("Failed to rewrite metadata checksums\n");
+			rc = 1;
+			goto closefs;
+		}
+	}
+
+	if (l_flag)
+		list_super(sb);
+	if (stride_set) {
+		sb->s_raid_stride = stride;
+		ext2fs_mark_super_dirty(fs);
+		printf(_("Setting stride size to %d\n"), stride);
+	}
+	if (stripe_width_set) {
+		sb->s_raid_stripe_width = stripe_width;
+		ext2fs_mark_super_dirty(fs);
+		printf(_("Setting stripe width to %d\n"), stripe_width);
+	}
+	if (ext_mount_opts) {
+		strncpy((char *)(fs->super->s_mount_opts), ext_mount_opts,
+			sizeof(fs->super->s_mount_opts));
+		fs->super->s_mount_opts[sizeof(fs->super->s_mount_opts)-1] = 0;
+		ext2fs_mark_super_dirty(fs);
+		printf(_("Setting extended default mount options to '%s'\n"),
+		       ext_mount_opts);
+		free(ext_mount_opts);
+	}
+
+	free(device_name);
+	remove_error_table(&et_ext2_error_table);
+
+closefs:
+	if (fd >= 0)
+		close(fd);
+	if (fsuuid)
+		free(fsuuid);
+	if (rc) {
+		ext2fs_mmp_stop(fs);
+#ifndef BUILD_AS_LIB
+		exit(1);
+#endif
+	}
+
+	if (feature_64bit)
+		convert_64bit(fs, feature_64bit);
+
+	retval = ext2fs_close_free(&fs);
+	if (retval) {
+		com_err("tune2fs", retval,
+			_("while writing out and closing file system"));
+		rc = 1;
+	}
+
+	return rc;
+}