Merging upstream version 1.47.1.

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

35 files changed, 549 insertions, 333 deletions

diff --git a/lib/ext2fs/Android.bp b/lib/ext2fs/Android.bp
index db8b3b7..af4c2db 100644
--- a/lib/ext2fs/Android.bp
+++ b/lib/ext2fs/Android.bp
@@ -19,6 +19,7 @@ cc_library {
     host_supported: true,
     ramdisk_available: true,
     vendor_ramdisk_available: true,
+    vendor_available: true,
     recovery_available: true,
     unique_host_soname: true,
     defaults: ["e2fsprogs-defaults"],
diff --git a/lib/ext2fs/Makefile.in b/lib/ext2fs/Makefile.in
index 798ff60..1b3a91b 100644
--- a/lib/ext2fs/Makefile.in
+++ b/lib/ext2fs/Makefile.in
@@ -24,8 +24,8 @@ COMPILE_ET=	_ET_DIR_OVERRIDE=$(srcdir)/../et ../et/compile_et
 DEBUG_OBJS= debug_cmds.o extent_cmds.o tst_cmds.o debugfs.o util.o \
 	ncheck.o icheck.o ls.o lsdel.o dump.o set_fields.o logdump.o \
 	htree.o unused.o e2freefrag.o filefrag.o extent_inode.o zap.o \
-	xattrs.o quota.o tst_libext2fs.o create_inode.o journal.o \
-	revoke.o recovery.o do_journal.o
+	xattrs.o quota.o tst_libext2fs.o create_inode.o \
+	create_inode_libarchive.o journal.o revoke.o recovery.o do_journal.o
 
 DEBUG_SRCS= debug_cmds.c extent_cmds.c tst_cmds.c \
 	$(top_srcdir)/debugfs/debugfs.c \
@@ -46,6 +46,7 @@ DEBUG_SRCS= debug_cmds.c extent_cmds.c tst_cmds.c \
 	$(top_srcdir)/debugfs/xattrs.c \
 	$(top_srcdir)/misc/e2freefrag.c \
 	$(top_srcdir)/misc/create_inode.c \
+	$(top_srcdir)/misc/create_inode_libarchive.c \
 	$(top_srcdir)/debugfs/journal.c \
 	$(top_srcdir)/e2fsck/revoke.c \
 	$(top_srcdir)/e2fsck/recovery.c \
@@ -92,6 +93,7 @@ OBJS= $(DEBUGFS_LIB_OBJS) $(RESIZE_LIB_OBJS) $(E2IMAGE_LIB_OBJS) \
 	gen_bitmap64.o \
 	get_num_dirs.o \
 	get_pathname.o \
+	getenv.o \
 	getsize.o \
 	getsectsize.o \
 	hashmap.o \
@@ -174,6 +176,7 @@ SRCS= ext2_err.c \
 	$(srcdir)/gen_bitmap64.c \
 	$(srcdir)/get_num_dirs.c \
 	$(srcdir)/get_pathname.c \
+	$(srcdir)/getenv.c \
 	$(srcdir)/getsize.c \
 	$(srcdir)/getsectsize.c \
 	$(srcdir)/hashmap.c \
@@ -458,7 +461,13 @@ e2freefrag.o: $(top_srcdir)/misc/e2freefrag.c
 	$(E) "	CC $<"
 	$(Q) $(CC) $(ALL_CFLAGS) -DDEBUGFS -I$(top_srcdir)/debugfs -c $< -o $@
 
-create_inode.o: $(top_srcdir)/misc/create_inode.c
+create_inode.o: $(top_srcdir)/misc/create_inode.c \
+ $(top_srcdir)/misc/create_inode_libarchive.c
+	$(E) "	CC $<"
+	$(Q) $(CC) $(ALL_CFLAGS) -DDEBUGFS -c $< -o $@
+
+create_inode_libarchive.o: $(top_srcdir)/misc/create_inode_libarchive.c \
+ $(top_srcdir)/misc/create_inode_libarchive.c
 	$(E) "	CC $<"
 	$(Q) $(CC) $(ALL_CFLAGS) -DDEBUGFS -c $< -o $@
 
@@ -499,7 +508,7 @@ tst_libext2fs: $(DEBUG_OBJS) \
 	$(Q) $(CC) -o tst_libext2fs $(ALL_LDFLAGS) -DDEBUG $(DEBUG_OBJS) \
 		$(STATIC_LIBSS) $(STATIC_LIBE2P) $(LIBSUPPORT) \
 		$(STATIC_LIBEXT2FS) $(LIBBLKID) $(LIBUUID) $(LIBMAGIC) \
-		$(STATIC_LIBCOM_ERR) $(SYSLIBS) -I $(top_srcdir)/debugfs
+		$(STATIC_LIBCOM_ERR) $(SYSLIBS) $(LIBARCHIVE) -I $(top_srcdir)/debugfs
 
 tst_inline: $(srcdir)/inline.c $(STATIC_LIBEXT2FS) $(DEPSTATIC_LIBCOM_ERR)
 	$(E) "	LD $@"
@@ -699,10 +708,11 @@ bb_compat.o: $(srcdir)/bb_compat.c $(top_builddir)/lib/config.h \
  $(srcdir)/hashmap.h $(srcdir)/bitops.h
 bb_inode.o: $(srcdir)/bb_inode.c $(top_builddir)/lib/config.h \
  $(top_builddir)/lib/dirpaths.h $(srcdir)/ext2_fs.h \
- $(top_builddir)/lib/ext2fs/ext2_types.h $(srcdir)/ext2fs.h \
- $(srcdir)/ext2_fs.h $(srcdir)/ext3_extents.h $(top_srcdir)/lib/et/com_err.h \
- $(srcdir)/ext2_io.h $(top_builddir)/lib/ext2fs/ext2_err.h \
- $(srcdir)/ext2_ext_attr.h $(srcdir)/hashmap.h $(srcdir)/bitops.h
+ $(top_builddir)/lib/ext2fs/ext2_types.h $(srcdir)/ext2fsP.h \
+ $(srcdir)/ext2fs.h $(srcdir)/ext2_fs.h $(srcdir)/ext3_extents.h \
+ $(top_srcdir)/lib/et/com_err.h $(srcdir)/ext2_io.h \
+ $(top_builddir)/lib/ext2fs/ext2_err.h $(srcdir)/ext2_ext_attr.h \
+ $(srcdir)/hashmap.h $(srcdir)/bitops.h
 bitmaps.o: $(srcdir)/bitmaps.c $(top_builddir)/lib/config.h \
  $(top_builddir)/lib/dirpaths.h $(srcdir)/ext2_fs.h \
  $(top_builddir)/lib/ext2fs/ext2_types.h $(srcdir)/ext2fs.h \
@@ -831,10 +841,10 @@ expanddir.o: $(srcdir)/expanddir.c $(top_builddir)/lib/config.h \
 ext_attr.o: $(srcdir)/ext_attr.c $(top_builddir)/lib/config.h \
  $(top_builddir)/lib/dirpaths.h $(srcdir)/ext2_fs.h \
  $(top_builddir)/lib/ext2fs/ext2_types.h $(srcdir)/ext2_ext_attr.h \
- $(srcdir)/ext4_acl.h $(srcdir)/ext2fs.h $(srcdir)/ext2_fs.h \
- $(srcdir)/ext3_extents.h $(top_srcdir)/lib/et/com_err.h $(srcdir)/ext2_io.h \
- $(top_builddir)/lib/ext2fs/ext2_err.h $(srcdir)/ext2_ext_attr.h \
- $(srcdir)/hashmap.h $(srcdir)/bitops.h
+ $(srcdir)/ext4_acl.h $(srcdir)/ext2fsP.h $(srcdir)/ext2fs.h \
+ $(srcdir)/ext2_fs.h $(srcdir)/ext3_extents.h $(top_srcdir)/lib/et/com_err.h \
+ $(srcdir)/ext2_io.h $(top_builddir)/lib/ext2fs/ext2_err.h \
+ $(srcdir)/ext2_ext_attr.h $(srcdir)/hashmap.h $(srcdir)/bitops.h
 extent.o: $(srcdir)/extent.c $(top_builddir)/lib/config.h \
  $(top_builddir)/lib/dirpaths.h $(srcdir)/ext2_fs.h \
  $(top_builddir)/lib/ext2fs/ext2_types.h $(srcdir)/ext2fsP.h \
@@ -896,6 +906,12 @@ get_pathname.o: $(srcdir)/get_pathname.c $(top_builddir)/lib/config.h \
  $(srcdir)/ext2_fs.h $(srcdir)/ext3_extents.h $(top_srcdir)/lib/et/com_err.h \
  $(srcdir)/ext2_io.h $(top_builddir)/lib/ext2fs/ext2_err.h \
  $(srcdir)/ext2_ext_attr.h $(srcdir)/hashmap.h $(srcdir)/bitops.h
+getenv.o: $(srcdir)/getenv.c $(top_builddir)/lib/config.h \
+ $(top_builddir)/lib/dirpaths.h $(srcdir)/ext2fs.h \
+ $(top_builddir)/lib/ext2fs/ext2_types.h $(srcdir)/ext2_fs.h \
+ $(srcdir)/ext3_extents.h $(top_srcdir)/lib/et/com_err.h $(srcdir)/ext2_io.h \
+ $(top_builddir)/lib/ext2fs/ext2_err.h $(srcdir)/ext2_ext_attr.h \
+ $(srcdir)/hashmap.h $(srcdir)/bitops.h
 getsize.o: $(srcdir)/getsize.c $(top_builddir)/lib/config.h \
  $(top_builddir)/lib/dirpaths.h $(srcdir)/ext2_fs.h \
  $(top_builddir)/lib/ext2fs/ext2_types.h $(srcdir)/ext2fs.h \
@@ -930,10 +946,11 @@ ind_block.o: $(srcdir)/ind_block.c $(top_builddir)/lib/config.h \
  $(srcdir)/ext2_ext_attr.h $(srcdir)/hashmap.h $(srcdir)/bitops.h
 initialize.o: $(srcdir)/initialize.c $(top_builddir)/lib/config.h \
  $(top_builddir)/lib/dirpaths.h $(srcdir)/ext2_fs.h \
- $(top_builddir)/lib/ext2fs/ext2_types.h $(srcdir)/ext2fs.h \
- $(srcdir)/ext2_fs.h $(srcdir)/ext3_extents.h $(top_srcdir)/lib/et/com_err.h \
- $(srcdir)/ext2_io.h $(top_builddir)/lib/ext2fs/ext2_err.h \
- $(srcdir)/ext2_ext_attr.h $(srcdir)/hashmap.h $(srcdir)/bitops.h
+ $(top_builddir)/lib/ext2fs/ext2_types.h $(srcdir)/ext2fsP.h \
+ $(srcdir)/ext2fs.h $(srcdir)/ext2_fs.h $(srcdir)/ext3_extents.h \
+ $(top_srcdir)/lib/et/com_err.h $(srcdir)/ext2_io.h \
+ $(top_builddir)/lib/ext2fs/ext2_err.h $(srcdir)/ext2_ext_attr.h \
+ $(srcdir)/hashmap.h $(srcdir)/bitops.h
 inline.o: $(srcdir)/inline.c $(top_builddir)/lib/config.h \
  $(top_builddir)/lib/dirpaths.h $(srcdir)/ext2_fs.h \
  $(top_builddir)/lib/ext2fs/ext2_types.h $(srcdir)/ext2fs.h \
@@ -1005,8 +1022,8 @@ mkdir.o: $(srcdir)/mkdir.c $(top_builddir)/lib/config.h \
 mkjournal.o: $(srcdir)/mkjournal.c $(top_builddir)/lib/config.h \
  $(top_builddir)/lib/dirpaths.h $(srcdir)/ext2_fs.h \
  $(top_builddir)/lib/ext2fs/ext2_types.h $(top_srcdir)/lib/e2p/e2p.h \
- $(srcdir)/ext2_fs.h $(srcdir)/ext2fs.h $(srcdir)/ext3_extents.h \
- $(top_srcdir)/lib/et/com_err.h $(srcdir)/ext2_io.h \
+ $(srcdir)/ext2_fs.h $(srcdir)/ext2fsP.h $(srcdir)/ext2fs.h \
+ $(srcdir)/ext3_extents.h $(top_srcdir)/lib/et/com_err.h $(srcdir)/ext2_io.h \
  $(top_builddir)/lib/ext2fs/ext2_err.h $(srcdir)/ext2_ext_attr.h \
  $(srcdir)/hashmap.h $(srcdir)/bitops.h $(srcdir)/kernel-jbd.h \
  $(srcdir)/jfs_compat.h $(srcdir)/kernel-list.h $(srcdir)/compiler.h
@@ -1049,6 +1066,13 @@ openfs.o: $(srcdir)/openfs.c $(top_builddir)/lib/config.h \
  $(srcdir)/ext2_io.h $(top_builddir)/lib/ext2fs/ext2_err.h \
  $(srcdir)/ext2_ext_attr.h $(srcdir)/hashmap.h $(srcdir)/bitops.h \
  $(srcdir)/e2image.h
+orphan.o: $(srcdir)/orphan.c $(top_builddir)/lib/config.h \
+ $(top_builddir)/lib/dirpaths.h $(srcdir)/ext2_fs.h \
+ $(top_builddir)/lib/ext2fs/ext2_types.h $(srcdir)/ext2fsP.h \
+ $(srcdir)/ext2fs.h $(srcdir)/ext2_fs.h $(srcdir)/ext3_extents.h \
+ $(top_srcdir)/lib/et/com_err.h $(srcdir)/ext2_io.h \
+ $(top_builddir)/lib/ext2fs/ext2_err.h $(srcdir)/ext2_ext_attr.h \
+ $(srcdir)/hashmap.h $(srcdir)/bitops.h
 progress.o: $(srcdir)/progress.c $(top_builddir)/lib/config.h \
  $(top_builddir)/lib/dirpaths.h $(srcdir)/ext2fs.h \
  $(top_builddir)/lib/ext2fs/ext2_types.h $(srcdir)/ext2_fs.h \
@@ -1082,10 +1106,11 @@ read_bb_file.o: $(srcdir)/read_bb_file.c $(top_builddir)/lib/config.h \
  $(srcdir)/ext2_ext_attr.h $(srcdir)/hashmap.h $(srcdir)/bitops.h
 res_gdt.o: $(srcdir)/res_gdt.c $(top_builddir)/lib/config.h \
  $(top_builddir)/lib/dirpaths.h $(srcdir)/ext2_fs.h \
- $(top_builddir)/lib/ext2fs/ext2_types.h $(srcdir)/ext2fs.h \
- $(srcdir)/ext2_fs.h $(srcdir)/ext3_extents.h $(top_srcdir)/lib/et/com_err.h \
- $(srcdir)/ext2_io.h $(top_builddir)/lib/ext2fs/ext2_err.h \
- $(srcdir)/ext2_ext_attr.h $(srcdir)/hashmap.h $(srcdir)/bitops.h
+ $(top_builddir)/lib/ext2fs/ext2_types.h $(srcdir)/ext2fsP.h \
+ $(srcdir)/ext2fs.h $(srcdir)/ext2_fs.h $(srcdir)/ext3_extents.h \
+ $(top_srcdir)/lib/et/com_err.h $(srcdir)/ext2_io.h \
+ $(top_builddir)/lib/ext2fs/ext2_err.h $(srcdir)/ext2_ext_attr.h \
+ $(srcdir)/hashmap.h $(srcdir)/bitops.h
 rw_bitmaps.o: $(srcdir)/rw_bitmaps.c $(top_builddir)/lib/config.h \
  $(top_builddir)/lib/dirpaths.h $(srcdir)/ext2_fs.h \
  $(top_builddir)/lib/ext2fs/ext2_types.h $(srcdir)/ext2fs.h \
@@ -1419,7 +1444,17 @@ create_inode.o: $(top_srcdir)/misc/create_inode.c \
  $(srcdir)/ext2_io.h $(top_builddir)/lib/ext2fs/ext2_err.h \
  $(srcdir)/ext2_ext_attr.h $(srcdir)/hashmap.h $(srcdir)/bitops.h \
  $(srcdir)/fiemap.h $(top_srcdir)/misc/create_inode.h \
- $(top_srcdir)/lib/e2p/e2p.h $(top_srcdir)/lib/support/nls-enable.h
+ $(top_srcdir)/lib/e2p/e2p.h $(top_srcdir)/lib/support/nls-enable.h \
+ $(top_srcdir)/misc/create_inode_libarchive.h
+create_inode_libarchive.o: $(top_srcdir)/misc/create_inode_libarchive.c \
+ $(top_builddir)/lib/config.h $(top_builddir)/lib/dirpaths.h \
+ $(top_builddir)/lib/ext2fs/ext2_types.h $(top_srcdir)/misc/create_inode.h \
+ $(top_srcdir)/lib/et/com_err.h $(top_srcdir)/lib/e2p/e2p.h \
+ $(srcdir)/ext2_fs.h $(srcdir)/ext2fs.h $(srcdir)/ext3_extents.h \
+ $(srcdir)/ext2_io.h $(top_builddir)/lib/ext2fs/ext2_err.h \
+ $(srcdir)/ext2_ext_attr.h $(srcdir)/hashmap.h $(srcdir)/bitops.h \
+ $(top_srcdir)/misc/create_inode_libarchive.h \
+ $(top_srcdir)/lib/support/nls-enable.h
 journal.o: $(top_srcdir)/debugfs/journal.c $(top_builddir)/lib/config.h \
  $(top_builddir)/lib/dirpaths.h $(top_srcdir)/debugfs/journal.h \
  $(srcdir)/../../e2fsck/jfs_user.h $(srcdir)/ext2_fs.h \
diff --git a/lib/ext2fs/alloc_sb.c b/lib/ext2fs/alloc_sb.c
index 8530b40..e92739e 100644
--- a/lib/ext2fs/alloc_sb.c
+++ b/lib/ext2fs/alloc_sb.c
@@ -46,8 +46,7 @@ int ext2fs_reserve_super_and_bgd(ext2_filsys fs,
 				 ext2fs_block_bitmap bmap)
 {
 	blk64_t	super_blk, old_desc_blk, new_desc_blk;
-	blk_t	used_blks;
-	int	old_desc_blocks, num_blocks;
+	blk_t	used_blks, old_desc_blocks, num_blocks;
 
 	ext2fs_super_and_bgd_loc2(fs, group, &super_blk,
 				  &old_desc_blk, &new_desc_blk, &used_blks);
@@ -79,3 +78,28 @@ int ext2fs_reserve_super_and_bgd(ext2_filsys fs,
 
 	return num_blocks  ;
 }
+
+/*
+ * This function reserves the superblock and block group descriptors
+ * for a given block group and returns the number of blocks used by the
+ * super block and group descriptors by looking up the block bitmap.
+ */
+errcode_t ext2fs_reserve_super_and_bgd2(ext2_filsys fs,
+				        dgrp_t group,
+				        ext2fs_block_bitmap bmap,
+				        blk_t *desc_blocks)
+{
+	blk64_t	num_blocks;
+	errcode_t retval = 0;
+
+	ext2fs_reserve_super_and_bgd(fs, group, bmap);
+
+	retval = ext2fs_count_used_blocks(fs,
+					ext2fs_group_first_block2(fs, group),
+					ext2fs_group_last_block2(fs, group),
+					&num_blocks);
+	if (!retval)
+		*desc_blocks = num_blocks;
+
+	return retval;
+}
diff --git a/lib/ext2fs/bb_inode.c b/lib/ext2fs/bb_inode.c
index 11f10eb..8b29e1c 100644
--- a/lib/ext2fs/bb_inode.c
+++ b/lib/ext2fs/bb_inode.c
@@ -20,7 +20,6 @@
 #include <unistd.h>
 #endif
 #include <fcntl.h>
-#include <time.h>
 #if HAVE_SYS_STAT_H
 #include <sys/stat.h>
 #endif
@@ -29,7 +28,7 @@
 #endif
 
 #include "ext2_fs.h"
-#include "ext2fs.h"
+#include "ext2fsP.h"
 
 struct set_badblock_record {
 	ext2_badblocks_iterate	bb_iter;
@@ -58,8 +57,9 @@ static int clear_bad_block_proc(ext2_filsys fs, blk_t *block_nr,
 errcode_t ext2fs_update_bb_inode(ext2_filsys fs, ext2_badblocks_list bb_list)
 {
 	errcode_t			retval;
-	struct set_badblock_record 	rec;
+	struct set_badblock_record	rec;
 	struct ext2_inode		inode;
+	time_t				now;
 
 	EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
 
@@ -124,9 +124,11 @@ errcode_t ext2fs_update_bb_inode(ext2_filsys fs, ext2_badblocks_list bb_list)
 	if (retval)
 		goto cleanup;
 
-	inode.i_atime = inode.i_mtime = fs->now ? fs->now : time(0);
-	if (!inode.i_ctime)
-		inode.i_ctime = fs->now ? fs->now : time(0);
+	now = ext2fsP_get_time(fs);
+	ext2fs_inode_xtime_set(&inode, i_atime, now);
+	if (!ext2fs_inode_xtime_get(&inode, i_ctime))
+		ext2fs_inode_xtime_set(&inode, i_ctime, now);
+	ext2fs_inode_xtime_set(&inode, i_mtime, now);
 	ext2fs_iblk_set(fs, &inode, rec.bad_block_count);
 	retval = ext2fs_inode_size_set(fs, &inode,
 				       rec.bad_block_count * fs->blocksize);
diff --git a/lib/ext2fs/closefs.c b/lib/ext2fs/closefs.c
index 69cbdd8..8e5bec0 100644
--- a/lib/ext2fs/closefs.c
+++ b/lib/ext2fs/closefs.c
@@ -301,7 +301,7 @@ errcode_t ext2fs_flush2(ext2_filsys fs, int flags)
 	fs_state = fs->super->s_state;
 	feature_incompat = fs->super->s_feature_incompat;
 
-	fs->super->s_wtime = fs->now ? fs->now : time(NULL);
+	ext2fs_set_tstamp(fs->super, s_wtime, ext2fsP_get_time(fs));
 	fs->super->s_block_group_nr = 0;
 
 	/*
diff --git a/lib/ext2fs/e2image.h b/lib/ext2fs/e2image.h
index 53b20cc..143e0dc 100644
--- a/lib/ext2fs/e2image.h
+++ b/lib/ext2fs/e2image.h
@@ -26,8 +26,9 @@ struct ext2_image_hdr {
 
 	__u32	image_device;	/* Device number of image file */
 	__u32	image_inode;	/* Inode number of image file */
-	__u32	image_time;	/* Time of image creation */
-	__u32	image_reserved[8];
+	__u32	image_time_lo;	/* Time of image creation */
+	__u32	image_time_hi;	/* High bits of image test creation */
+	__u32	image_reserved[7];
 
 	__u32	offset_super;	/* Byte offset of the sb and descriptors */
 	__u32	offset_inode;	/* Byte offset of the inode table  */
diff --git a/lib/ext2fs/ext2_fs.h b/lib/ext2fs/ext2_fs.h
index 0fc9c09..586141f 100644
--- a/lib/ext2fs/ext2_fs.h
+++ b/lib/ext2fs/ext2_fs.h
@@ -512,9 +512,9 @@ struct ext2_inode_large {
 
 #define i_checksum_lo	osd2.linux2.l_i_checksum_lo
 
-#define inode_includes(size, field)			\
-       (size >= (sizeof(((struct ext2_inode_large *)0)->field) + \
-                 offsetof(struct ext2_inode_large, field)))
+#define ext2fs_inode_includes(size, field)				\
+	((size) >= (sizeof(((struct ext2_inode_large *)0)->field) +	\
+		    offsetof(struct ext2_inode_large, field)))
 
 #if defined(__KERNEL__) || defined(__linux__)
 #define i_reserved1	osd1.linux1.l_i_reserved1
diff --git a/lib/ext2fs/ext2_io.h b/lib/ext2fs/ext2_io.h
index 679184e..27eaaf1 100644
--- a/lib/ext2fs/ext2_io.h
+++ b/lib/ext2fs/ext2_io.h
@@ -34,6 +34,8 @@ typedef struct struct_io_stats *io_stats;
 #define CHANNEL_FLAGS_DISCARD_ZEROES	0x02
 #define CHANNEL_FLAGS_BLOCK_DEVICE	0x04
 #define CHANNEL_FLAGS_THREADS		0x08
+#define CHANNEL_FLAGS_NODISCARD		0x10
+#define CHANNEL_FLAGS_NOZEROOUT		0x20
 
 #define io_channel_discard_zeroes_data(i) (i->flags & CHANNEL_FLAGS_DISCARD_ZEROES)
 
@@ -57,7 +59,7 @@ struct struct_io_channel {
 				       int actual_bytes_written,
 				       errcode_t error);
 	int		refcount;
-	int		flags;
+	unsigned int	flags;
 	long		reserved[14];
 	void		*private_data;
 	void		*app_data;
diff --git a/lib/ext2fs/ext2fs.h b/lib/ext2fs/ext2fs.h
index 72c60d2..6e87829 100644
--- a/lib/ext2fs/ext2fs.h
+++ b/lib/ext2fs/ext2fs.h
@@ -222,6 +222,11 @@ typedef struct ext2_file *ext2_file_t;
 #define EXT2_FLAG_IGNORE_SWAP_DIRENT	0x8000000
 
 /*
+ * Internal flags for use by the ext2fs library only
+ */
+#define EXT2_FLAG2_USE_FAKE_TIME	0x000000001
+
+/*
  * Special flag in the ext2 inode i_flag field that means that this is
  * a new inode.  (So that ext2_write_inode() can clear extra fields.)
  */
@@ -275,10 +280,11 @@ struct struct_ext2_filsys {
 	int				cluster_ratio_bits;
 	__u16				default_bitmap_type;
 	__u16				pad;
+	__u32				flags2;
 	/*
 	 * Reserved for future expansion
 	 */
-	__u32				reserved[5];
+	__u32				reserved[4];
 
 	/*
 	 * Reserved for the use of the calling application.
@@ -579,6 +585,73 @@ typedef struct ext2_struct_inode_scan *ext2_inode_scan;
  */
 #define EXT2_I_SIZE(i)	((i)->i_size | ((__u64) (i)->i_size_high << 32))
 
+static inline __u32 __encode_extra_time(time_t seconds, __u32 nsec)
+{
+	__u32 extra = 0;
+
+#if (SIZEOF_TIME_T > 4)
+	extra = ((seconds - (__s32)(seconds & 0xffffffff)) >> 32) &
+		EXT4_EPOCH_MASK;
+#endif
+	return extra | (nsec << EXT4_EPOCH_BITS);
+}
+static inline time_t __decode_extra_sec(time_t seconds, __u32 extra)
+{
+#if (SIZEOF_TIME_T > 4)
+	if (extra & EXT4_EPOCH_MASK)
+		seconds += ((time_t)(extra & EXT4_EPOCH_MASK) << 32);
+#endif
+	return seconds;
+}
+static inline __u32 __decode_extra_nsec(__u32 extra)
+{
+	return (extra & EXT4_NSEC_MASK) >> EXT4_EPOCH_BITS;
+}
+#define ext2fs_inode_actual_size(inode)					      \
+	((size_t)(EXT2_GOOD_OLD_INODE_SIZE +				      \
+		  (sizeof(*inode) > EXT2_GOOD_OLD_INODE_SIZE ?		      \
+		   ((struct ext2_inode_large *)(inode))->i_extra_isize : 0)))
+#define clamp(val, min, max) ((val) < (min) ? (min) : ((val) > (max) ?	      \
+						       (max) : (val)))
+#define ext2fs_inode_xtime_set(inode, field, sec)			      \
+do {									      \
+	if (ext2fs_inode_includes(ext2fs_inode_actual_size(inode),	      \
+				  field ## _extra)) {			      \
+		(inode)->field = (__s32)(sec & 0xfffffff);		      \
+		((struct ext2_inode_large *)(inode))->field ## _extra =       \
+			__encode_extra_time(sec, 0);			      \
+	} else {							      \
+		(inode)->field = clamp(sec, INT32_MIN, INT32_MAX);	      \
+	}								      \
+} while (0)
+#define ext2fs_inode_xtime_get(inode, field)				      \
+(ext2fs_inode_includes(ext2fs_inode_actual_size(inode), field ## _extra) ?    \
+	__decode_extra_sec((inode)->field,				      \
+		((struct ext2_inode_large *)(inode))->field ## _extra) :      \
+		(time_t)(inode)->field)
+
+static inline void __sb_set_tstamp(__u32 *lo, __u8 *hi, time_t seconds)
+{
+	*lo = seconds & 0xffffffff;
+#if (SIZEOF_TIME_T > 4)
+	*hi = (seconds >> 32) & EXT4_EPOCH_MASK;
+#else
+	*hi = 0;
+#endif
+}
+static inline time_t __sb_get_tstamp(__u32 *lo, __u8 *hi)
+{
+#if (SIZEOF_TIME_T == 4)
+	return *lo;
+#else
+	return ((time_t)(*hi) << 32) | *lo;
+#endif
+}
+#define ext2fs_set_tstamp(sb, field, seconds) \
+	__sb_set_tstamp(&(sb)->field, &(sb)->field ## _hi, seconds)
+#define ext2fs_get_tstamp(sb, field) \
+	__sb_get_tstamp(&(sb)->field, &(sb)->field ## _hi)
+
 /*
  * ext2_icount_t abstraction
  */
@@ -795,6 +868,10 @@ errcode_t ext2fs_alloc_range(ext2_filsys fs, int flags, blk64_t goal,
 extern int ext2fs_reserve_super_and_bgd(ext2_filsys fs,
 					dgrp_t group,
 					ext2fs_block_bitmap bmap);
+extern errcode_t ext2fs_reserve_super_and_bgd2(ext2_filsys fs,
+					       dgrp_t group,
+					       ext2fs_block_bitmap bmap,
+					       blk_t *desc_blocks);
 extern void ext2fs_set_block_alloc_stats_callback(ext2_filsys fs,
 						  void (*func)(ext2_filsys fs,
 							       blk64_t blk,
@@ -1483,6 +1560,13 @@ errcode_t ext2fs_convert_subcluster_bitmap(ext2_filsys fs,
 					   ext2fs_block_bitmap *bitmap);
 errcode_t ext2fs_count_used_clusters(ext2_filsys fs, blk64_t start,
 				     blk64_t end, blk64_t *out);
+errcode_t ext2fs_count_used_blocks(ext2_filsys fs, blk64_t start,
+				   blk64_t end, blk64_t *out);
+extern unsigned int ext2fs_list_backups(ext2_filsys fs, unsigned int *three,
+				unsigned int *five, unsigned int *seven);
+
+/* getenv.c */
+extern char *ext2fs_safe_getenv(const char *arg);
 
 /* get_num_dirs.c */
 extern errcode_t ext2fs_get_num_dirs(ext2_filsys fs, ext2_ino_t *ret_num_dirs);
@@ -2217,6 +2301,30 @@ static inline unsigned int ext2_dir_htree_level(ext2_filsys fs)
 	return EXT4_HTREE_LEVEL_COMPAT;
 }
 
+/*
+ * We explicitly decided not to reserve space for a 64-bit dtime,
+ * since it's never displayed or exposed to userspace.  The dtime
+ * field is used a linked list for the ophan list, and for forensic
+ * purposes when trying to determine when an inode was deleted.  So
+ * right after the 2038 epoch, a deleted inode might end up with a
+ * dtime which is zero or smaller than the number of inodes, which
+ * will result in e2fsck reporting a potential problems.  So when we
+ * set the dtime, make sure that the dtime won't be mistaken for an
+ * inode number.
+ */
+static inline void ext2fs_set_dtime(ext2_filsys fs, struct ext2_inode *inode)
+{
+	__u32	t;
+
+	if (fs->now || (fs->flags2 & EXT2_FLAG2_USE_FAKE_TIME))
+		t = fs->now & 0xFFFFFFFF;
+	else
+		t = time(NULL) & 0xFFFFFFFF;
+	if (t < fs->super->s_inodes_count)
+		t = fs->super->s_inodes_count;
+	inode->i_dtime = t;
+}
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/ext2fs/ext2fsP.h b/lib/ext2fs/ext2fsP.h
index 0687384..d1f2105 100644
--- a/lib/ext2fs/ext2fsP.h
+++ b/lib/ext2fs/ext2fsP.h
@@ -26,6 +26,13 @@ static inline int ext2fsP_is_disk_device(mode_t mode)
 #endif
 }
 
+static inline time_t ext2fsP_get_time(ext2_filsys fs)
+{
+	if (fs->now || (fs->flags2 & EXT2_FLAG2_USE_FAKE_TIME))
+		return fs->now;
+	return time(NULL);
+}
+
 /*
  * Badblocks list
  */
diff --git a/lib/ext2fs/ext_attr.c b/lib/ext2fs/ext_attr.c
index 3494046..1b5f90d 100644
--- a/lib/ext2fs/ext_attr.c
+++ b/lib/ext2fs/ext_attr.c
@@ -23,7 +23,7 @@
 #include "ext2_ext_attr.h"
 #include "ext4_acl.h"
 
-#include "ext2fs.h"
+#include "ext2fsP.h"
 
 static errcode_t read_ea_inode_hash(ext2_filsys fs, ext2_ino_t ino, __u32 *hash)
 {
@@ -1342,7 +1342,7 @@ static errcode_t xattr_inode_dec_ref(ext2_filsys fs, ext2_ino_t ino)
 		goto write_out;
 
 	inode.i_links_count = 0;
-	inode.i_dtime = fs->now ? fs->now : time(0);
+	ext2fs_set_dtime(fs, EXT2_INODE(&inode));
 
 	ret = ext2fs_free_ext_attr(fs, ino, &inode);
 	if (ret)
diff --git a/lib/ext2fs/gen_bitmap64.c b/lib/ext2fs/gen_bitmap64.c
index 4289e81..4874555 100644
--- a/lib/ext2fs/gen_bitmap64.c
+++ b/lib/ext2fs/gen_bitmap64.c
@@ -257,7 +257,7 @@ void ext2fs_free_generic_bmap(ext2fs_generic_bitmap gen_bmap)
 		return;
 
 #ifdef ENABLE_BMAP_STATS
-	if (getenv("E2FSPROGS_BITMAP_STATS")) {
+	if (ext2fs_safe_getenv("E2FSPROGS_BITMAP_STATS")) {
 		ext2fs_print_bmap_statistics(bmap);
 		bmap->bitmap_ops->print_stats(bmap);
 	}
@@ -945,8 +945,8 @@ errcode_t ext2fs_find_first_set_generic_bmap(ext2fs_generic_bitmap bitmap,
 	return ENOENT;
 }
 
-errcode_t ext2fs_count_used_clusters(ext2_filsys fs, blk64_t start,
-				     blk64_t end, blk64_t *out)
+errcode_t ext2fs_count_used_blocks(ext2_filsys fs, blk64_t start,
+				   blk64_t end, blk64_t *out)
 {
 	blk64_t		next;
 	blk64_t		tot_set = 0;
@@ -976,6 +976,19 @@ errcode_t ext2fs_count_used_clusters(ext2_filsys fs, blk64_t start,
 	}
 
 	if (!retval)
+		*out = tot_set;
+	return retval;
+}
+
+errcode_t ext2fs_count_used_clusters(ext2_filsys fs, blk64_t start,
+				     blk64_t end, blk64_t *out)
+{
+	blk64_t		tot_set = 0;
+	errcode_t	retval = 0;
+
+	retval = ext2fs_count_used_blocks(fs, start, end, &tot_set);
+
+	if (!retval)
 		*out = EXT2FS_NUM_B2C(fs, tot_set);
 	return retval;
 }
diff --git a/lib/ext2fs/getenv.c b/lib/ext2fs/getenv.c
new file mode 100644
index 0000000..409a78a
--- /dev/null
+++ b/lib/ext2fs/getenv.c
@@ -0,0 +1,57 @@
+/*
+ * getenv.c --- implement a safe getenv for use by the ext2fs library
+ *
+ * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
+ *	2002 by Theodore Ts'o.
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Library
+ * General Public License, version 2.
+ * %End-Header%
+ */
+#if !defined(__FreeBSD__) && !defined(__NetBSD__) && !defined(__OpenBSD__)
+#define _XOPEN_SOURCE 600
+#define _DARWIN_C_SOURCE
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+#endif
+
+#include "config.h"
+#include <stdlib.h>
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#ifdef HAVE_SYS_PRCTL_H
+#include <sys/prctl.h>
+#else
+#define PR_GET_DUMPABLE 3
+#endif
+#if (!defined(HAVE_PRCTL) && defined(linux))
+#include <sys/syscall.h>
+#endif
+
+#include "ext2fs.h"
+
+char *ext2fs_safe_getenv(const char *arg)
+{
+	if ((getuid() != geteuid()) || (getgid() != getegid()))
+		return NULL;
+#ifdef HAVE_PRCTL
+	if (prctl(PR_GET_DUMPABLE, 0, 0, 0, 0) == 0)
+		return NULL;
+#else
+#if (defined(linux) && defined(SYS_prctl))
+	if (syscall(SYS_prctl, PR_GET_DUMPABLE, 0, 0, 0, 0) == 0)
+		return NULL;
+#endif
+#endif
+
+#if defined(HAVE_SECURE_GETENV)
+	return secure_getenv(arg);
+#elif defined(HAVE___SECURE_GETENV)
+	return __secure_getenv(arg);
+#else
+	return getenv(arg);
+#endif
+}
diff --git a/lib/ext2fs/getsize.c b/lib/ext2fs/getsize.c
index bcf3020..a028634 100644
--- a/lib/ext2fs/getsize.c
+++ b/lib/ext2fs/getsize.c
@@ -71,12 +71,11 @@
 #define HAVE_GET_FILE_SIZE_EX 1
 #endif
 
-HANDLE windows_get_handle(io_channel channel);
-
 errcode_t ext2fs_get_device_size2(const char *file, int blocksize,
 				  blk64_t *retblocks)
 {
-	HANDLE dev;
+	int fd;
+	HANDLE h;
 	PARTITION_INFORMATION pi;
 	DISK_GEOMETRY gi;
 	DWORD retbytes;
@@ -86,25 +85,18 @@ errcode_t ext2fs_get_device_size2(const char *file, int blocksize,
 	DWORD filesize;
 #endif /* HAVE_GET_FILE_SIZE_EX */
 
-	io_channel data_io = 0;
-	int retval;
-
-	retval = windows_io_manager->open(file, 0, &data_io);
-	if (retval)
-		return retval;
-
-	dev = windows_get_handle(data_io);
-	if (dev == INVALID_HANDLE_VALUE)
-		return EBADF;
-
-	if (DeviceIoControl(dev, IOCTL_DISK_GET_PARTITION_INFO,
+	fd = ext2fs_open_file(file, O_RDONLY, 0);
+	if (fd < 0)
+		return errno;
+	h = (HANDLE)_get_osfhandle(fd);
+	if (DeviceIoControl(h, IOCTL_DISK_GET_PARTITION_INFO,
 			    &pi, sizeof(PARTITION_INFORMATION),
 			    &pi, sizeof(PARTITION_INFORMATION),
 			    &retbytes, NULL)) {
 
 		*retblocks = pi.PartitionLength.QuadPart / blocksize;
 
-	} else if (DeviceIoControl(dev, IOCTL_DISK_GET_DRIVE_GEOMETRY,
+	} else if (DeviceIoControl(h, IOCTL_DISK_GET_DRIVE_GEOMETRY,
 				&gi, sizeof(DISK_GEOMETRY),
 				&gi, sizeof(DISK_GEOMETRY),
 				&retbytes, NULL)) {
@@ -115,20 +107,19 @@ errcode_t ext2fs_get_device_size2(const char *file, int blocksize,
 			     gi.Cylinders.QuadPart / blocksize;
 
 #ifdef HAVE_GET_FILE_SIZE_EX
-	} else if (GetFileSizeEx(dev, &filesize)) {
+	} else if (GetFileSizeEx(h, &filesize)) {
 		*retblocks = filesize.QuadPart / blocksize;
 	}
 #else
 	} else {
-		filesize = GetFileSize(dev, NULL);
+		filesize = GetFileSize(h, NULL);
 		if (INVALID_FILE_SIZE != filesize) {
 			*retblocks = filesize / blocksize;
 		}
 	}
 #endif /* HAVE_GET_FILE_SIZE_EX */
 
-	windows_io_manager->close(data_io);
-
+	close(fd);
 	return 0;
 }
 
diff --git a/lib/ext2fs/hashmap.c b/lib/ext2fs/hashmap.c
index 697b2bc..1579467 100644
--- a/lib/ext2fs/hashmap.c
+++ b/lib/ext2fs/hashmap.c
@@ -34,8 +34,8 @@ struct ext2fs_hashmap *ext2fs_hashmap_create(
 				uint32_t(*hash_fct)(const void*, size_t),
 				void(*free_fct)(void*), size_t size)
 {
-	struct ext2fs_hashmap *h = calloc(sizeof(struct ext2fs_hashmap) +
-				sizeof(struct ext2fs_hashmap_entry) * size, 1);
+	struct ext2fs_hashmap *h = calloc(1, sizeof(struct ext2fs_hashmap) +
+				sizeof(struct ext2fs_hashmap_entry) * size);
 	if (!h)
 		return NULL;
 
diff --git a/lib/ext2fs/imager.c b/lib/ext2fs/imager.c
index 23290a6..16b0977 100644
--- a/lib/ext2fs/imager.c
+++ b/lib/ext2fs/imager.c
@@ -299,7 +299,7 @@ errcode_t ext2fs_image_super_read(ext2_filsys fs, int fd,
 	ssize_t		actual, size;
 	errcode_t	retval;
 
-	size = (ssize_t)fs->blocksize * (fs->group_desc_count + 1);
+	size = (ssize_t)fs->blocksize * (fs->desc_blocks + 1);
 	buf = malloc(size);
 	if (!buf)
 		return ENOMEM;
@@ -323,7 +323,7 @@ errcode_t ext2fs_image_super_read(ext2_filsys fs, int fd,
 	memcpy(fs->super, buf, SUPERBLOCK_SIZE);
 
 	memcpy(fs->group_desc, buf + fs->blocksize,
-	       (ssize_t)fs->blocksize * fs->group_desc_count);
+	       (ssize_t)fs->blocksize * fs->desc_blocks);
 
 	retval = 0;
 
diff --git a/lib/ext2fs/initialize.c b/lib/ext2fs/initialize.c
index edd692b..b9cfd1b 100644
--- a/lib/ext2fs/initialize.c
+++ b/lib/ext2fs/initialize.c
@@ -26,7 +26,7 @@
 #endif
 
 #include "ext2_fs.h"
-#include "ext2fs.h"
+#include "ext2fsP.h"
 
 #ifndef O_BINARY
 #define O_BINARY 0
@@ -125,9 +125,15 @@ errcode_t ext2fs_initialize(const char *name, int flags,
 	fs->flags |= EXT2_FLAG_SWAP_BYTES;
 #endif
 
-	time_env = getenv("E2FSPROGS_FAKE_TIME");
-	if (time_env)
+	time_env = ext2fs_safe_getenv("SOURCE_DATE_EPOCH");
+	if (time_env) {
 		fs->now = strtoul(time_env, NULL, 0);
+		fs->flags2 |= EXT2_FLAG2_USE_FAKE_TIME;
+	} else {
+		time_env = ext2fs_safe_getenv("E2FSPROGS_FAKE_TIME");
+		if (time_env)
+			fs->now = strtoul(time_env, NULL, 0);
+	}
 
 	io_flags = IO_FLAG_RW;
 	if (flags & EXT2_FLAG_EXCLUSIVE)
@@ -218,7 +224,8 @@ errcode_t ext2fs_initialize(const char *name, int flags,
 	}
 
 	set_field(s_checkinterval, 0);
-	super->s_mkfs_time = super->s_lastcheck = fs->now ? fs->now : time(NULL);
+	ext2fs_set_tstamp(super, s_mkfs_time, ext2fsP_get_time(fs));
+	ext2fs_set_tstamp(super, s_lastcheck, ext2fsP_get_time(fs));
 
 	super->s_creator_os = CREATOR_OS;
 
@@ -308,13 +315,6 @@ retry:
 		set_field(s_inodes_count, ext2fs_blocks_count(super) / i);
 
 	/*
-	 * Make sure we have at least EXT2_FIRST_INO + 1 inodes, so
-	 * that we have enough inodes for the filesystem(!)
-	 */
-	if (super->s_inodes_count < EXT2_FIRST_INODE(super)+1)
-		super->s_inodes_count = EXT2_FIRST_INODE(super)+1;
-
-	/*
 	 * There should be at least as many inodes as the user
 	 * requested.  Figure out how many inodes per group that
 	 * should be.  But make sure that we don't allocate more than
@@ -375,6 +375,15 @@ ipg_retry:
 	}
 	super->s_inodes_count = super->s_inodes_per_group *
 		fs->group_desc_count;
+	/*
+	 * Make sure we have at least EXT2_FIRST_INO + 1 inodes, so
+	 * that we have enough inodes for the filesystem(!)
+	 */
+	if (super->s_inodes_count < EXT2_FIRST_INODE(super)+1) {
+		ipg += 8;
+		goto ipg_retry;
+	}
+
 	super->s_free_inodes_count = super->s_inodes_count;
 
 	/*
@@ -521,33 +530,43 @@ ipg_retry:
 	csum_flag = ext2fs_has_group_desc_csum(fs);
 	reserved_inos = super->s_first_ino;
 	for (i = 0; i < fs->group_desc_count; i++) {
+		blk_t grp_free_blocks;
+		ext2_ino_t inodes;
+
+		retval = ext2fs_reserve_super_and_bgd2(fs, i,
+						       fs->block_map,
+						       &numblocks);
+		if (retval)
+			goto cleanup;
+
 		/*
 		 * Don't set the BLOCK_UNINIT group for the last group
 		 * because the block bitmap needs to be padded.
 		 */
 		if (csum_flag) {
-			if (i != fs->group_desc_count - 1)
+			if (i != fs->group_desc_count - 1 && numblocks == 0)
 				ext2fs_bg_flags_set(fs, i,
 						    EXT2_BG_BLOCK_UNINIT);
 			ext2fs_bg_flags_set(fs, i, EXT2_BG_INODE_UNINIT);
-			numblocks = super->s_inodes_per_group;
+			inodes = super->s_inodes_per_group;
 			if (reserved_inos) {
-				if (numblocks > reserved_inos) {
-					numblocks -= reserved_inos;
+				if (inodes > reserved_inos) {
+					inodes -= reserved_inos;
 					reserved_inos = 0;
 				} else {
-					reserved_inos -= numblocks;
-					numblocks = 0;
+					reserved_inos -= inodes;
+					inodes = 0;
 				}
 			}
-			ext2fs_bg_itable_unused_set(fs, i, numblocks);
+			ext2fs_bg_itable_unused_set(fs, i, inodes);
 		}
-		numblocks = ext2fs_reserve_super_and_bgd(fs, i, fs->block_map);
-		if (fs->super->s_log_groups_per_flex)
+
+		if (!fs->super->s_log_groups_per_flex)
 			numblocks += 2 + fs->inode_blocks_per_group;
 
-		free_blocks += numblocks;
-		ext2fs_bg_free_blocks_count_set(fs, i, numblocks);
+		grp_free_blocks = ext2fs_group_blocks_count(fs, i) - numblocks;
+		free_blocks += grp_free_blocks;
+		ext2fs_bg_free_blocks_count_set(fs, i, grp_free_blocks);
 		ext2fs_bg_free_inodes_count_set(fs, i, fs->super->s_inodes_per_group);
 		ext2fs_bg_used_dirs_count_set(fs, i, 0);
 		ext2fs_group_desc_csum_set(fs, i);
diff --git a/lib/ext2fs/inode.c b/lib/ext2fs/inode.c
index 957d5aa..c9389a2 100644
--- a/lib/ext2fs/inode.c
+++ b/lib/ext2fs/inode.c
@@ -1039,17 +1039,17 @@ errcode_t ext2fs_write_new_inode(ext2_filsys fs, ext2_ino_t ino,
 				 struct ext2_inode *inode)
 {
 	struct ext2_inode	*buf;
-	int 			size = EXT2_INODE_SIZE(fs->super);
+	int			size = EXT2_INODE_SIZE(fs->super);
 	struct ext2_inode_large	*large_inode;
 	errcode_t		retval;
-	__u32 			t = fs->now ? fs->now : time(NULL);
-
-	if (!inode->i_ctime)
-		inode->i_ctime = t;
-	if (!inode->i_mtime)
-		inode->i_mtime = t;
-	if (!inode->i_atime)
-		inode->i_atime = t;
+	time_t			t = ext2fsP_get_time(fs);
+
+	if (!ext2fs_inode_xtime_get(inode, i_atime))
+		ext2fs_inode_xtime_set(inode, i_atime, t);
+	if (!ext2fs_inode_xtime_get(inode, i_ctime))
+		ext2fs_inode_xtime_set(inode, i_ctime, t);
+	if (!ext2fs_inode_xtime_get(inode, i_mtime))
+		ext2fs_inode_xtime_set(inode, i_mtime, t);
 
 	if (size == sizeof(struct ext2_inode))
 		return ext2fs_write_inode_full(fs, ino, inode,
diff --git a/lib/ext2fs/ismounted.c b/lib/ext2fs/ismounted.c
index a7db1a5..c1c3102 100644
--- a/lib/ext2fs/ismounted.c
+++ b/lib/ext2fs/ismounted.c
@@ -108,7 +108,7 @@ static errcode_t check_mntent_file(const char *mtab_file, const char *file,
 
 	if ((f = setmntent (mtab_file, "r")) == NULL) {
 		if (errno == ENOENT) {
-			if (getenv("EXT2FS_NO_MTAB_OK"))
+			if (ext2fs_safe_getenv("EXT2FS_NO_MTAB_OK"))
 				return 0;
 			else
 				return EXT2_ET_NO_MTAB_FILE;
@@ -366,15 +366,15 @@ errcode_t ext2fs_check_mount_point(const char *device, int *mount_flags,
 	errcode_t	retval = 0;
 	int 		busy = 0;
 
-	if (getenv("EXT2FS_PRETEND_RO_MOUNT")) {
+	if (ext2fs_safe_getenv("EXT2FS_PRETEND_RO_MOUNT")) {
 		*mount_flags = EXT2_MF_MOUNTED | EXT2_MF_READONLY;
-		if (getenv("EXT2FS_PRETEND_ROOTFS"))
+		if (ext2fs_safe_getenv("EXT2FS_PRETEND_ROOTFS"))
 			*mount_flags = EXT2_MF_ISROOT;
 		return 0;
 	}
-	if (getenv("EXT2FS_PRETEND_RW_MOUNT")) {
+	if (ext2fs_safe_getenv("EXT2FS_PRETEND_RW_MOUNT")) {
 		*mount_flags = EXT2_MF_MOUNTED;
-		if (getenv("EXT2FS_PRETEND_ROOTFS"))
+		if (ext2fs_safe_getenv("EXT2FS_PRETEND_ROOTFS"))
 			*mount_flags = EXT2_MF_ISROOT;
 		return 0;
 	}
diff --git a/lib/ext2fs/llseek.c b/lib/ext2fs/llseek.c
index 45f21d0..9118b23 100644
--- a/lib/ext2fs/llseek.c
+++ b/lib/ext2fs/llseek.c
@@ -35,68 +35,32 @@
 
 #ifdef __linux__
 
-#if defined(HAVE_LSEEK64) && defined(HAVE_LSEEK64_PROTOTYPE)
-
-#define my_llseek lseek64
-
-#else
-#if defined(HAVE_LLSEEK)
-#include <sys/syscall.h>
-
-#ifndef HAVE_LLSEEK_PROTOTYPE
-extern long long llseek (int fd, long long offset, int origin);
-#endif
-
-#define my_llseek llseek
-
-#else	/* ! HAVE_LLSEEK */
-
-#if SIZEOF_LONG == SIZEOF_LONG_LONG || _FILE_OFFSET_BITS+0 == 64
-
-#define my_llseek lseek
-
-#else /* SIZEOF_LONG != SIZEOF_LONG_LONG */
-
 #include <linux/unistd.h>
 
-#ifndef __NR__llseek
-#define __NR__llseek            140
-#endif
-
-#ifndef __i386__
-static int _llseek (unsigned int, unsigned long,
-		   unsigned long, ext2_loff_t *, unsigned int);
-
-static _syscall5(int,_llseek,unsigned int,fd,unsigned long,offset_high,
-		 unsigned long, offset_low,ext2_loff_t *,result,
-		 unsigned int, origin);
-#endif
-
 static ext2_loff_t my_llseek (int fd, ext2_loff_t offset, int origin)
 {
-	ext2_loff_t result;
+#if SIZEOF_OFF_T >= 8
+	return lseek(fd, offset, origin);
+#elif HAVE_LSEEK64_PROTOTYPE
+	return lseek64(fd, offset, origin);
+#elif HAVE_LLSEEK_PROTOTYPE
+	return llseek(fd, offset, origin);
+#elif defined(__NR__llseek)
+	loff_t result;
 	int retval;
-
-#ifndef __i386__
-	retval = _llseek(fd, ((unsigned long long) offset) >> 32,
+	retval = syscall(__NR__llseek, fd,
+		(unsigned long)(offset >> 32),
+		(unsigned long)(offset & 0xffffffff),
+		&result, origin);
+	return (retval == -1 ? retval : result);
 #else
-	retval = syscall(__NR__llseek, fd, (unsigned long long) (offset >> 32),
+	errno = ENOSYS;
+	return -1;
 #endif
-			  ((unsigned long long) offset) & 0xffffffff,
-			&result, origin);
-	return (retval == -1 ? (ext2_loff_t) retval : result);
 }
 
-#endif	/* SIZE_LONG == SIZEOF_LONG_LONG */
-
-#endif /* HAVE_LLSEEK */
-#endif /* defined(HAVE_LSEEK64) && defined(HAVE_LSEEK64_PROTOTYPE) */
-
 ext2_loff_t ext2fs_llseek (int fd, ext2_loff_t offset, int origin)
 {
-#if SIZEOF_OFF_T >= SIZEOF_LONG_LONG
-	return my_llseek (fd, offset, origin);
-#else
 	ext2_loff_t result;
 	static int do_compat = 0;
 
@@ -117,7 +81,6 @@ ext2_loff_t ext2fs_llseek (int fd, ext2_loff_t offset, int origin)
 		return -1;
 	}
 	return result;
-#endif
 }
 
 #else /* !linux */
diff --git a/lib/ext2fs/mkjournal.c b/lib/ext2fs/mkjournal.c
index 54772dd..27cdfa0 100644
--- a/lib/ext2fs/mkjournal.c
+++ b/lib/ext2fs/mkjournal.c
@@ -20,7 +20,6 @@
 #include <errno.h>
 #endif
 #include <fcntl.h>
-#include <time.h>
 #if HAVE_SYS_STAT_H
 #include <sys/stat.h>
 #endif
@@ -36,7 +35,7 @@
 
 #include "ext2_fs.h"
 #include "e2p/e2p.h"
-#include "ext2fs.h"
+#include "ext2fsP.h"
 
 #include "kernel-jbd.h"
 
@@ -285,6 +284,7 @@ static errcode_t write_journal_inode(ext2_filsys fs, ext2_ino_t journal_ino,
 	unsigned long long	inode_size;
 	int			falloc_flags = EXT2_FALLOCATE_FORCE_INIT;
 	blk64_t			zblk;
+	time_t			now;
 
 	if ((retval = ext2fs_create_journal_superblock2(fs, jparams, flags,
 						       &buf)))
@@ -312,7 +312,9 @@ static errcode_t write_journal_inode(ext2_filsys fs, ext2_ino_t journal_ino,
 
 	inode_size = (unsigned long long)fs->blocksize *
 			(jparams->num_journal_blocks + jparams->num_fc_blocks);
-	inode.i_mtime = inode.i_ctime = fs->now ? fs->now : time(0);
+	now = ext2fsP_get_time(fs);
+	ext2fs_inode_xtime_set(&inode, i_mtime, now);
+	ext2fs_inode_xtime_set(&inode, i_ctime, now);
 	inode.i_links_count = 1;
 	inode.i_mode = LINUX_S_IFREG | 0600;
 	retval = ext2fs_inode_size_set(fs, &inode, inode_size);
diff --git a/lib/ext2fs/openfs.c b/lib/ext2fs/openfs.c
index fd56a9a..2b8e0e7 100644
--- a/lib/ext2fs/openfs.c
+++ b/lib/ext2fs/openfs.c
@@ -149,9 +149,15 @@ errcode_t ext2fs_open2(const char *name, const char *io_options,
 	fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
 	fs->umask = 022;
 
-	time_env = getenv("E2FSPROGS_FAKE_TIME");
-	if (time_env)
+	time_env = ext2fs_safe_getenv("SOURCE_DATE_EPOCH");
+	if (time_env) {
 		fs->now = strtoul(time_env, NULL, 0);
+		fs->flags2 |= EXT2_FLAG2_USE_FAKE_TIME;
+	} else {
+		time_env = ext2fs_safe_getenv("E2FSPROGS_FAKE_TIME");
+		if (time_env)
+			fs->now = strtoul(time_env, NULL, 0);
+	}
 
 	retval = ext2fs_get_mem(strlen(name)+1, &fs->device_name);
 	if (retval)
@@ -330,13 +336,14 @@ retry:
 	}
 
 	/* Enforce the block group descriptor size */
-	if (!(flags & EXT2_FLAG_IGNORE_SB_ERRORS) &&
-	    ext2fs_has_feature_64bit(fs->super)) {
+	if (ext2fs_has_feature_64bit(fs->super)) {
 		unsigned desc_size = fs->super->s_desc_size;
 
-		if ((desc_size < EXT2_MIN_DESC_SIZE_64BIT) ||
-		    (desc_size > EXT2_MAX_DESC_SIZE) ||
-		    (desc_size & (desc_size - 1)) != 0) {
+		if (desc_size == 0 ||
+		    (!(flags & EXT2_FLAG_IGNORE_SB_ERRORS) &&
+		     ((desc_size > EXT2_MAX_DESC_SIZE) ||
+		      (desc_size < EXT2_MIN_DESC_SIZE_64BIT) ||
+		      (desc_size & (desc_size - 1)) != 0))) {
 			retval = EXT2_ET_BAD_DESC_SIZE;
 			goto cleanup;
 		}
diff --git a/lib/ext2fs/orphan.c b/lib/ext2fs/orphan.c
index e25f20c..913eb9a 100644
--- a/lib/ext2fs/orphan.c
+++ b/lib/ext2fs/orphan.c
@@ -126,23 +126,23 @@ errcode_t ext2fs_create_orphan_file(ext2_filsys fs, blk_t num_blocks)
 	char *buf = NULL, *zerobuf = NULL;
 	struct mkorphan_info oi;
 	struct ext4_orphan_block_tail *ob_tail;
+	time_t now;
 
-	if (!ino) {
+	if (ino) {
+		err = ext2fs_read_inode(fs, ino, &inode);
+		if (err)
+			return err;
+		if (EXT2_I_SIZE(&inode)) {
+			err = ext2fs_truncate_orphan_file(fs);
+			if (err)
+				return err;
+		}
+	} else {
 		err = ext2fs_new_inode(fs, EXT2_ROOT_INO, LINUX_S_IFREG | 0600,
 				       0, &ino);
 		if (err)
 			return err;
 		ext2fs_inode_alloc_stats2(fs, ino, +1, 0);
-		ext2fs_mark_ib_dirty(fs);
-	}
-
-	err = ext2fs_read_inode(fs, ino, &inode);
-	if (err)
-		return err;
-	if (EXT2_I_SIZE(&inode)) {
-		err = ext2fs_truncate_orphan_file(fs);
-		if (err)
-			return err;
 	}
 
 	memset(&inode, 0, sizeof(struct ext2_inode));
@@ -185,8 +185,10 @@ errcode_t ext2fs_create_orphan_file(ext2_filsys fs, blk_t num_blocks)
 	if (err)
 		goto out;
 	ext2fs_iblk_set(fs, &inode, 0);
-	inode.i_atime = inode.i_mtime =
-		inode.i_ctime = fs->now ? fs->now : time(0);
+	now = ext2fsP_get_time(fs);
+	ext2fs_inode_xtime_set(&inode, i_atime, now);
+	ext2fs_inode_xtime_set(&inode, i_ctime, now);
+	ext2fs_inode_xtime_set(&inode, i_mtime, now);
 	inode.i_links_count = 1;
 	inode.i_mode = LINUX_S_IFREG | 0600;
 	ext2fs_iblk_add_blocks(fs, &inode, oi.alloc_blocks);
diff --git a/lib/ext2fs/progress.c b/lib/ext2fs/progress.c
index fe4292f..61ab3f0 100644
--- a/lib/ext2fs/progress.c
+++ b/lib/ext2fs/progress.c
@@ -53,7 +53,7 @@ void ext2fs_numeric_progress_init(ext2_filsys fs,
 	backspaces[sizeof(backspaces)-1] = 0;
 
 	memset(progress, 0, sizeof(*progress));
-	if (getenv("E2FSPROGS_SKIP_PROGRESS"))
+	if (ext2fs_safe_getenv("E2FSPROGS_SKIP_PROGRESS"))
 		progress->skip_progress++;
 
 
diff --git a/lib/ext2fs/qcow2.c b/lib/ext2fs/qcow2.c
index 2082417..8f96eee 100644
--- a/lib/ext2fs/qcow2.c
+++ b/lib/ext2fs/qcow2.c
@@ -134,7 +134,9 @@ static int qcow2_read_l2_table(struct ext2_qcow2_image *img,
 static int qcow2_copy_data(int fdin, int fdout, __u64 off_in,
 			   __u64 off_out, void *buf, size_t count)
 {
-	size_t size;
+	ssize_t c1, c2, c;
+	void *ptr;
+	int retries = 10;
 
 	assert(buf);
 
@@ -144,14 +146,24 @@ static int qcow2_copy_data(int fdin, int fdout, __u64 off_in,
 	if (ext2fs_llseek(fdin, off_in, SEEK_SET) < 0)
 		return errno;
 
-	size = read(fdin, buf, count);
-	if (size != count)
-		return errno;
-
-	size = write(fdout, buf, count);
-	if (size != count)
-		return errno;
-
+	while (count > 0) {
+		errno = 0;
+		c1 = read(fdin, buf, count);
+		if (c1 < 0 || ((c1 == 0) && errno))
+			return errno;
+		if (c1 == 0)
+			break; 	/* EOF */
+
+		for (ptr = buf, c = c1; c > 0; ptr += c2, c -= c2) {
+			errno = 0;
+			c2 = write(fdout, ptr, c1);
+			if (c2 < 0 || ((c2 == 0) && errno))
+				return errno;
+			if (c2 == 0 && --retries <= 0)
+				break; /* This should never happen...  */
+		}
+		count -= c1;
+	}
 	return 0;
 }
 
diff --git a/lib/ext2fs/qcow2.h b/lib/ext2fs/qcow2.h
index b649c9c..343e85a 100644
--- a/lib/ext2fs/qcow2.h
+++ b/lib/ext2fs/qcow2.h
@@ -24,6 +24,8 @@
  * %End-Header%
  */
 
+#include <ext2fs/ext2_types.h>
+
 /* Number of l2 tables in memory before writeback */
 #define L2_CACHE_PREALLOC	512
 
diff --git a/lib/ext2fs/rbtree.h b/lib/ext2fs/rbtree.h
index 790f5c1..b96e6f2 100644
--- a/lib/ext2fs/rbtree.h
+++ b/lib/ext2fs/rbtree.h
@@ -163,7 +163,7 @@ extern struct rb_node *ext2fs_rb_first(const struct rb_root *);
 extern struct rb_node *ext2fs_rb_last(const struct rb_root *);
 
 /* Fast replacement of a single node without remove/rebalance/add/rebalance */
-extern void ext2fs_rb_replace_node(struct rb_node *victim, struct rb_node *new,
+extern void ext2fs_rb_replace_node(struct rb_node *victim, struct rb_node *new_,
 				 struct rb_root *root);
 
 static inline void ext2fs_rb_link_node(struct rb_node * node,
diff --git a/lib/ext2fs/res_gdt.c b/lib/ext2fs/res_gdt.c
index fa8d8d6..3349648 100644
--- a/lib/ext2fs/res_gdt.c
+++ b/lib/ext2fs/res_gdt.c
@@ -15,23 +15,24 @@
 #include <string.h>
 #include <time.h>
 #include "ext2_fs.h"
-#include "ext2fs.h"
+#include "ext2fsP.h"
 
 /*
  * Iterate through the groups which hold BACKUP superblock/GDT copies in an
  * ext3 filesystem.  The counters should be initialized to 1, 5, and 7 before
- * calling this for the first time.  In a sparse filesystem it will be the
- * sequence of powers of 3, 5, and 7: 1, 3, 5, 7, 9, 25, 27, 49, 81, ...
+ * calling this for the first time.  In a sparse_super filesystem it will be
+ * the sequence of powers of 3, 5, and 7: 1, 3, 5, 7, 9, 25, 27, 49, 81, ...
  * For a non-sparse filesystem it will be every group: 1, 2, 3, 4, ...
+ * For a sparse_super2 filesystem there are two backups in specific groups.
  */
-static unsigned int list_backups(ext2_filsys fs, unsigned int *three,
-				 unsigned int *five, unsigned int *seven)
+dgrp_t ext2fs_list_backups(ext2_filsys fs, dgrp_t *three,
+			   dgrp_t *five, dgrp_t *seven)
 {
-	unsigned int *min = three;
-	int mult = 3;
-	unsigned int ret;
+	dgrp_t *min = three;
+	unsigned long long mult = 3;
+	dgrp_t ret;
 
-	if (ext2fs_has_feature_sparse_super2(fs->super)) {
+	if (fs && ext2fs_has_feature_sparse_super2(fs->super)) {
 		if (*min == 1) {
 			*min += 1;
 			if (fs->super->s_backup_bgs[0])
@@ -42,11 +43,14 @@ static unsigned int list_backups(ext2_filsys fs, unsigned int *three,
 			if (fs->super->s_backup_bgs[1])
 				return fs->super->s_backup_bgs[1];
 		}
+
 		return fs->group_desc_count;
 	}
-	if (!ext2fs_has_feature_sparse_super(fs->super)) {
+
+	if (fs && !ext2fs_has_feature_sparse_super(fs->super)) {
 		ret = *min;
 		*min += 1;
+
 		return ret;
 	}
 
@@ -60,7 +64,11 @@ static unsigned int list_backups(ext2_filsys fs, unsigned int *three,
 	}
 
 	ret = *min;
-	*min *= mult;
+	mult *= *min;
+	if (mult > (dgrp_t)-1)
+		*min = (dgrp_t)-1;
+	else
+		*min = mult;
 
 	return ret;
 }
@@ -135,15 +143,15 @@ errcode_t ext2fs_create_resize_inode(ext2_filsys fs)
 		retval = ext2fs_inode_size_set(fs, &inode, inode_size);
 		if (retval)
 			goto out_free;
-		inode.i_ctime = fs->now ? fs->now : time(0);
+		inode.i_ctime = ext2fsP_get_time(fs);
 	}
 
 	for (rsv_off = 0, gdt_off = fs->desc_blocks,
 	     gdt_blk = sb_blk + 1 + fs->desc_blocks;
 	     rsv_off < sb->s_reserved_gdt_blocks;
 	     rsv_off++, gdt_off++, gdt_blk++) {
-		unsigned int three = 1, five = 5, seven = 7;
-		unsigned int grp, last = 0;
+		dgrp_t three = 1, five = 5, seven = 7;
+		dgrp_t grp, last = 0;
 		int gdt_dirty = 0;
 
 		gdt_off %= apb;
@@ -183,7 +191,7 @@ errcode_t ext2fs_create_resize_inode(ext2_filsys fs)
 			goto out_dindir;
 		}
 
-		while ((grp = list_backups(fs, &three, &five, &seven)) <
+		while ((grp = ext2fs_list_backups(fs, &three, &five, &seven)) <
 		       fs->group_desc_count) {
 			blk_t expect = gdt_blk + grp * sb->s_blocks_per_group;
 
@@ -227,7 +235,10 @@ out_inode:
 	       EXT2_I_SIZE(&inode));
 #endif
 	if (inode_dirty) {
-		inode.i_atime = inode.i_mtime = fs->now ? fs->now : time(0);
+		time_t now = ext2fsP_get_time(fs);
+
+		ext2fs_inode_xtime_set(&inode, i_atime, now);
+		ext2fs_inode_xtime_set(&inode, i_mtime, now);
 		retval2 = ext2fs_write_new_inode(fs, EXT2_RESIZE_INO, &inode);
 		if (!retval)
 			retval = retval2;
diff --git a/lib/ext2fs/rw_bitmaps.c b/lib/ext2fs/rw_bitmaps.c
index 1fe65f7..1da75e4 100644
--- a/lib/ext2fs/rw_bitmaps.c
+++ b/lib/ext2fs/rw_bitmaps.c
@@ -557,7 +557,7 @@ errcode_t ext2fs_rw_bitmaps(ext2_filsys fs, int flags, int num_threads)
 	 * MacOS, FreeBSD, etc.
 	 * ref: https://stackoverflow.com/questions/150355
 	 */
-	if (num_threads < 0)
+	if (num_threads <= 0)
 		num_threads = 4;
 
 	if ((unsigned) num_threads > fs->group_desc_count)
diff --git a/lib/ext2fs/swapfs.c b/lib/ext2fs/swapfs.c
index fe764b9..d8d2140 100644
--- a/lib/ext2fs/swapfs.c
+++ b/lib/ext2fs/swapfs.c
@@ -345,21 +345,21 @@ void ext2fs_swap_inode_full(ext2_filsys fs, struct ext2_inode_large *t,
 		return;		/* Illegal inode extra_isize */
 
 	inode_size = EXT2_GOOD_OLD_INODE_SIZE + extra_isize;
-	if (inode_includes(inode_size, i_checksum_hi))
+	if (ext2fs_inode_includes(inode_size, i_checksum_hi))
 		t->i_checksum_hi = ext2fs_swab16(f->i_checksum_hi);
-	if (inode_includes(inode_size, i_ctime_extra))
+	if (ext2fs_inode_includes(inode_size, i_ctime_extra))
 		t->i_ctime_extra = ext2fs_swab32(f->i_ctime_extra);
-	if (inode_includes(inode_size, i_mtime_extra))
+	if (ext2fs_inode_includes(inode_size, i_mtime_extra))
 		t->i_mtime_extra = ext2fs_swab32(f->i_mtime_extra);
-	if (inode_includes(inode_size, i_atime_extra))
+	if (ext2fs_inode_includes(inode_size, i_atime_extra))
 		t->i_atime_extra = ext2fs_swab32(f->i_atime_extra);
-	if (inode_includes(inode_size, i_crtime))
+	if (ext2fs_inode_includes(inode_size, i_crtime))
 		t->i_crtime = ext2fs_swab32(f->i_crtime);
-	if (inode_includes(inode_size, i_crtime_extra))
+	if (ext2fs_inode_includes(inode_size, i_crtime_extra))
 		t->i_crtime_extra = ext2fs_swab32(f->i_crtime_extra);
-	if (inode_includes(inode_size, i_version_hi))
+	if (ext2fs_inode_includes(inode_size, i_version_hi))
 		t->i_version_hi = ext2fs_swab32(f->i_version_hi);
-	if (inode_includes(inode_size, i_projid))
+	if (ext2fs_inode_includes(inode_size, i_projid))
                 t->i_projid = ext2fs_swab32(f->i_projid);
 	/* catch new static fields added after i_projid */
 	EXT2FS_BUILD_BUG_ON(sizeof(struct ext2_inode_large) != 160);
diff --git a/lib/ext2fs/test_io.c b/lib/ext2fs/test_io.c
index 6843edb..0324e53 100644
--- a/lib/ext2fs/test_io.c
+++ b/lib/ext2fs/test_io.c
@@ -23,14 +23,6 @@
 #if HAVE_SYS_TYPES_H
 #include <sys/types.h>
 #endif
-#ifdef HAVE_SYS_PRCTL_H
-#include <sys/prctl.h>
-#else
-#define PR_GET_DUMPABLE 3
-#endif
-#if (!defined(HAVE_PRCTL) && defined(linux))
-#include <sys/syscall.h>
-#endif
 
 #include "ext2_fs.h"
 #include "ext2fs.h"
@@ -144,31 +136,6 @@ static void test_abort(io_channel channel, unsigned long block)
 	abort();
 }
 
-static char *safe_getenv(const char *arg)
-{
-#if !defined(_WIN32)
-	if ((getuid() != geteuid()) || (getgid() != getegid()))
-		return NULL;
-#endif
-#if HAVE_PRCTL
-	if (prctl(PR_GET_DUMPABLE, 0, 0, 0, 0) == 0)
-		return NULL;
-#else
-#if (defined(linux) && defined(SYS_prctl))
-	if (syscall(SYS_prctl, PR_GET_DUMPABLE, 0, 0, 0, 0) == 0)
-		return NULL;
-#endif
-#endif
-
-#if defined(HAVE_SECURE_GETENV)
-	return secure_getenv(arg);
-#elif defined(HAVE___SECURE_GETENV)
-	return __secure_getenv(arg);
-#else
-	return getenv(arg);
-#endif
-}
-
 static errcode_t test_open(const char *name, int flags, io_channel *channel)
 {
 	io_channel	io = NULL;
@@ -217,25 +184,25 @@ static errcode_t test_open(const char *name, int flags, io_channel *channel)
 	data->write_blk64 =	test_io_cb_write_blk64;
 
 	data->outfile = NULL;
-	if ((value = safe_getenv("TEST_IO_LOGFILE")) != NULL)
+	if ((value = ext2fs_safe_getenv("TEST_IO_LOGFILE")) != NULL)
 		data->outfile = fopen(value, "w");
 	if (!data->outfile)
 		data->outfile = stderr;
 
 	data->flags = 0;
-	if ((value = safe_getenv("TEST_IO_FLAGS")) != NULL)
+	if ((value = ext2fs_safe_getenv("TEST_IO_FLAGS")) != NULL)
 		data->flags = strtoul(value, NULL, 0);
 
 	data->block = 0;
-	if ((value = safe_getenv("TEST_IO_BLOCK")) != NULL)
+	if ((value = ext2fs_safe_getenv("TEST_IO_BLOCK")) != NULL)
 		data->block = strtoul(value, NULL, 0);
 
 	data->read_abort_count = 0;
-	if ((value = safe_getenv("TEST_IO_READ_ABORT")) != NULL)
+	if ((value = ext2fs_safe_getenv("TEST_IO_READ_ABORT")) != NULL)
 		data->read_abort_count = strtoul(value, NULL, 0);
 
 	data->write_abort_count = 0;
-	if ((value = safe_getenv("TEST_IO_WRITE_ABORT")) != NULL)
+	if ((value = ext2fs_safe_getenv("TEST_IO_WRITE_ABORT")) != NULL)
 		data->write_abort_count = strtoul(value, NULL, 0);
 
 	if (data->real) {
diff --git a/lib/ext2fs/tst_bitmaps.c b/lib/ext2fs/tst_bitmaps.c
index cb3c70d..eaf2c59 100644
--- a/lib/ext2fs/tst_bitmaps.c
+++ b/lib/ext2fs/tst_bitmaps.c
@@ -140,7 +140,7 @@ unsigned long parse_ulong(const char *str, const char *cmd,
 }
 
 
-int check_fs_open(char *name)
+int check_fs_open(const char *name)
 {
 	if (!test_fs) {
 		com_err(name, 0, "Filesystem not open");
@@ -190,7 +190,8 @@ errout:
 	ext2fs_close_free(&test_fs);
 }
 
-void setup_cmd(int argc, char **argv, int sci_idx EXT2FS_ATTR((unused)),
+void setup_cmd(int argc, ss_argv_t argv,
+	       int sci_idx EXT2FS_ATTR((unused)),
 	       void *infop EXT2FS_ATTR((unused)))
 {
 	int		c, err;
@@ -271,7 +272,7 @@ void dump_bitmap(ext2fs_generic_bitmap bmap, unsigned int start, unsigned num)
 	free(buf);
 }
 
-void dump_inode_bitmap_cmd(int argc, char **argv,
+void dump_inode_bitmap_cmd(int argc, ss_argv_t argv,
 			   int sci_idx EXT2FS_ATTR((unused)),
 			   void *infop EXT2FS_ATTR((unused)))
 {
@@ -282,7 +283,7 @@ void dump_inode_bitmap_cmd(int argc, char **argv,
 	dump_bitmap(test_fs->inode_map, 1, test_fs->super->s_inodes_count);
 }
 	
-void dump_block_bitmap_cmd(int argc, char **argv,
+void dump_block_bitmap_cmd(int argc, ss_argv_t argv,
 			   int sci_idx EXT2FS_ATTR((unused)),
 			   void *infop EXT2FS_ATTR((unused)))
 {
@@ -294,7 +295,8 @@ void dump_block_bitmap_cmd(int argc, char **argv,
 		    test_fs->super->s_blocks_count);
 }
 	
-void do_setb(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
+void do_setb(int argc, ss_argv_t argv,
+	     int sci_idx EXT2FS_ATTR((unused)),
 	     void *infop EXT2FS_ATTR((unused)))
 {
 	unsigned int block, num;
@@ -333,7 +335,8 @@ void do_setb(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
 			test_result, op_result);
 }
 
-void do_clearb(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
+void do_clearb(int argc, ss_argv_t argv,
+	       int sci_idx EXT2FS_ATTR((unused)),
 	       void *infop EXT2FS_ATTR((unused)))
 {
 	unsigned int block, num;
@@ -372,7 +375,8 @@ void do_clearb(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
 			test_result, op_result);
 }
 
-void do_testb(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
+void do_testb(int argc, ss_argv_t argv,
+	      int sci_idx EXT2FS_ATTR((unused)),
 	      void *infop EXT2FS_ATTR((unused)))
 {
 	unsigned int block, num;
@@ -408,7 +412,8 @@ void do_testb(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
 	printf("Block %u is %s\n", block, test_result ? "set" : "clear");
 }
 
-void do_ffzb(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
+void do_ffzb(int argc, ss_argv_t argv,
+	     int sci_idx EXT2FS_ATTR((unused)),
 	     void *infop EXT2FS_ATTR((unused)))
 {
 	unsigned int start, end;
@@ -442,7 +447,8 @@ void do_ffzb(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
 	printf("First unmarked block is %llu\n", (unsigned long long) out);
 }
 
-void do_ffsb(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
+void do_ffsb(int argc, ss_argv_t argv,
+	     int sci_idx EXT2FS_ATTR((unused)),
 	     void *infop EXT2FS_ATTR((unused)))
 {
 	unsigned int start, end;
@@ -477,7 +483,8 @@ void do_ffsb(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
 }
 
 
-void do_zerob(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
+void do_zerob(int argc, ss_argv_t argv,
+	      int sci_idx EXT2FS_ATTR((unused)),
 	      void *infop EXT2FS_ATTR((unused)))
 {
 	if (check_fs_open(argv[0]))
@@ -487,7 +494,8 @@ void do_zerob(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
 	ext2fs_clear_block_bitmap(test_fs->block_map);
 }
 
-void do_seti(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
+void do_seti(int argc, ss_argv_t argv,
+	     int sci_idx EXT2FS_ATTR((unused)),
 	     void *infop EXT2FS_ATTR((unused)))
 {
 	unsigned int inode;
@@ -517,7 +525,8 @@ void do_seti(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
 	}
 }
 
-void do_cleari(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
+void do_cleari(int argc, ss_argv_t argv,
+	       int sci_idx EXT2FS_ATTR((unused)),
 	       void *infop EXT2FS_ATTR((unused)))
 {
 	unsigned int inode;
@@ -547,7 +556,8 @@ void do_cleari(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
 	}
 }
 
-void do_testi(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
+void do_testi(int argc, ss_argv_t argv,
+	      int sci_idx EXT2FS_ATTR((unused)),
 	      void *infop EXT2FS_ATTR((unused)))
 {
 	unsigned int inode;
@@ -570,7 +580,8 @@ void do_testi(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
 	printf("Inode %u is %s\n", inode, test_result ? "set" : "clear");
 }
 
-void do_ffzi(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
+void do_ffzi(int argc, ss_argv_t argv,
+	     int sci_idx EXT2FS_ATTR((unused)),
 	     void *infop EXT2FS_ATTR((unused)))
 {
 	unsigned int start, end;
@@ -604,7 +615,8 @@ void do_ffzi(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
 	printf("First unmarked inode is %u\n", out);
 }
 
-void do_ffsi(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
+void do_ffsi(int argc, ss_argv_t argv,
+	     int sci_idx EXT2FS_ATTR((unused)),
 	     void *infop EXT2FS_ATTR((unused)))
 {
 	unsigned int start, end;
@@ -638,7 +650,8 @@ void do_ffsi(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
 	printf("First marked inode is %u\n", out);
 }
 
-void do_zeroi(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
+void do_zeroi(int argc, ss_argv_t argv,
+	      int sci_idx EXT2FS_ATTR((unused)),
 	      void *infop EXT2FS_ATTR((unused)))
 {
 	if (check_fs_open(argv[0]))
diff --git a/lib/ext2fs/undo_io.c b/lib/ext2fs/undo_io.c
index f4a6d52..a1bb405 100644
--- a/lib/ext2fs/undo_io.c
+++ b/lib/ext2fs/undo_io.c
@@ -809,7 +809,7 @@ static errcode_t undo_close(io_channel channel)
 	if (--channel->refcount > 0)
 		return 0;
 	/* Before closing write the file system identity */
-	if (!getenv("UNDO_IO_SIMULATE_UNFINISHED"))
+	if (!ext2fs_safe_getenv("UNDO_IO_SIMULATE_UNFINISHED"))
 		data->hdr.state = ext2fs_cpu_to_le32(E2UNDO_STATE_FINISHED);
 	err = write_undo_indexes(data, 1);
 	ext2fs_remove_exit_fn(undo_atexit, data);
diff --git a/lib/ext2fs/unix_io.c b/lib/ext2fs/unix_io.c
index 3171c73..4b4f25a 100644
--- a/lib/ext2fs/unix_io.c
+++ b/lib/ext2fs/unix_io.c
@@ -18,7 +18,6 @@
 #if !defined(__FreeBSD__) && !defined(__NetBSD__) && !defined(__OpenBSD__)
 #define _XOPEN_SOURCE 600
 #define _DARWIN_C_SOURCE
-#define _FILE_OFFSET_BITS 64
 #ifndef _LARGEFILE_SOURCE
 #define _LARGEFILE_SOURCE
 #endif
@@ -53,11 +52,6 @@
 #ifdef HAVE_SYS_MOUNT_H
 #include <sys/mount.h>
 #endif
-#ifdef HAVE_SYS_PRCTL_H
-#include <sys/prctl.h>
-#else
-#define PR_GET_DUMPABLE 3
-#endif
 #if HAVE_SYS_STAT_H
 #include <sys/stat.h>
 #endif
@@ -182,29 +176,6 @@ static errcode_t unix_get_stats(io_channel channel, io_stats *stats)
 	return retval;
 }
 
-static char *safe_getenv(const char *arg)
-{
-	if ((getuid() != geteuid()) || (getgid() != getegid()))
-		return NULL;
-#ifdef HAVE_PRCTL
-	if (prctl(PR_GET_DUMPABLE, 0, 0, 0, 0) == 0)
-		return NULL;
-#else
-#if (defined(linux) && defined(SYS_prctl))
-	if (syscall(SYS_prctl, PR_GET_DUMPABLE, 0, 0, 0, 0) == 0)
-		return NULL;
-#endif
-#endif
-
-#if defined(HAVE_SECURE_GETENV)
-	return secure_getenv(arg);
-#elif defined(HAVE___SECURE_GETENV)
-	return __secure_getenv(arg);
-#else
-	return getenv(arg);
-#endif
-}
-
 /*
  * Here are the raw I/O functions
  */
@@ -728,7 +699,7 @@ static errcode_t unix_open_channel(const char *name, int fd,
 	struct		utsname ut;
 #endif
 
-	if (safe_getenv("UNIX_IO_FORCE_BOUNCE"))
+	if (ext2fs_safe_getenv("UNIX_IO_FORCE_BOUNCE"))
 		flags |= IO_FLAG_FORCE_BOUNCE;
 
 #ifdef __linux__
@@ -761,6 +732,9 @@ static errcode_t unix_open_channel(const char *name, int fd,
 	io->refcount = 1;
 	io->flags = 0;
 
+	if (ext2fs_safe_getenv("UNIX_IO_NOZEROOUT"))
+		io->flags |= CHANNEL_FLAGS_NOZEROOUT;
+
 	memset(data, 0, sizeof(struct unix_private_data));
 	data->magic = EXT2_ET_MAGIC_UNIX_IO_CHANNEL;
 	data->io_stats.num_fields = 2;
@@ -783,20 +757,19 @@ static errcode_t unix_open_channel(const char *name, int fd,
 	 * zero.
 	 */
 	if (ext2fs_fstat(data->dev, &st) == 0) {
-		if (ext2fsP_is_disk_device(st.st_mode))
-			io->flags |= CHANNEL_FLAGS_BLOCK_DEVICE;
-		else
-			io->flags |= CHANNEL_FLAGS_DISCARD_ZEROES;
-	}
-
+		if (ext2fsP_is_disk_device(st.st_mode)) {
 #ifdef BLKDISCARDZEROES
-	{
-		int zeroes = 0;
-		if (ioctl(data->dev, BLKDISCARDZEROES, &zeroes) == 0 &&
-		    zeroes)
+			int zeroes = 0;
+
+			if (ioctl(data->dev, BLKDISCARDZEROES, &zeroes) == 0 &&
+			    zeroes)
+				io->flags |= CHANNEL_FLAGS_DISCARD_ZEROES;
+#endif
+			io->flags |= CHANNEL_FLAGS_BLOCK_DEVICE;
+		} else {
 			io->flags |= CHANNEL_FLAGS_DISCARD_ZEROES;
+		}
 	}
-#endif
 
 #if defined(__CYGWIN__)
 	/*
@@ -1344,12 +1317,15 @@ static errcode_t unix_discard(io_channel channel, unsigned long long block,
 			      unsigned long long count)
 {
 	struct unix_private_data *data;
-	int		ret;
+	int		ret = EOPNOTSUPP;
 
 	EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
 	data = (struct unix_private_data *) channel->private_data;
 	EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_UNIX_IO_CHANNEL);
 
+	if (channel->flags & CHANNEL_FLAGS_NODISCARD)
+		goto unimplemented;
+
 	if (channel->flags & CHANNEL_FLAGS_BLOCK_DEVICE) {
 #ifdef BLKDISCARD
 		__u64 range[2];
@@ -1376,8 +1352,10 @@ static errcode_t unix_discard(io_channel channel, unsigned long long block,
 #endif
 	}
 	if (ret < 0) {
-		if (errno == EOPNOTSUPP)
+		if (errno == EOPNOTSUPP) {
+			channel->flags |= CHANNEL_FLAGS_NODISCARD;
 			goto unimplemented;
+		}
 		return errno;
 	}
 	return 0;
@@ -1425,9 +1403,6 @@ static errcode_t unix_zeroout(io_channel channel, unsigned long long block,
 	data = (struct unix_private_data *) channel->private_data;
 	EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_UNIX_IO_CHANNEL);
 
-	if (safe_getenv("UNIX_IO_NOZEROOUT"))
-		goto unimplemented;
-
 	if (!(channel->flags & CHANNEL_FLAGS_BLOCK_DEVICE)) {
 		/* Regular file, try to use truncate/punch/zero. */
 		struct stat statbuf;
@@ -1450,13 +1425,18 @@ static errcode_t unix_zeroout(io_channel channel, unsigned long long block,
 		}
 	}
 
+	if (channel->flags & CHANNEL_FLAGS_NOZEROOUT)
+		goto unimplemented;
+
 	ret = __unix_zeroout(data->dev,
 			(off_t)(block) * channel->block_size + data->offset,
 			(off_t)(count) * channel->block_size);
 err:
 	if (ret < 0) {
-		if (errno == EOPNOTSUPP)
+		if (errno == EOPNOTSUPP) {
+			channel->flags |= CHANNEL_FLAGS_NOZEROOUT;
 			goto unimplemented;
+		}
 		return errno;
 	}
 	return 0;
diff --git a/lib/ext2fs/windows_io.c b/lib/ext2fs/windows_io.c
index 83aea68..4bff074 100644
--- a/lib/ext2fs/windows_io.c
+++ b/lib/ext2fs/windows_io.c
@@ -154,6 +154,14 @@ static errcode_t windows_get_stats(io_channel channel, io_stats *stats)
 	return retval;
 }
 
+static LARGE_INTEGER make_large_integer(LONGLONG value)
+{
+	LARGE_INTEGER	li;
+
+	li.QuadPart = value;
+	return li;
+}
+
 /*
  * Here are the raw I/O functions
  */
@@ -174,14 +182,14 @@ static errcode_t raw_read_blk(io_channel channel,
 	location = ((ext2_loff_t) block * channel->block_size) + data->offset;
 
 	if (data->flags & IO_FLAG_FORCE_BOUNCE) {
-		if (SetFilePointer(data->handle, location, NULL, FILE_BEGIN) == INVALID_SET_FILE_POINTER) {
+		if (!SetFilePointerEx(data->handle, make_large_integer(location), NULL, FILE_BEGIN)) {
 			retval = GetLastError();
 			goto error_out;
 		}
 		goto bounce_read;
 	}
 
-	if (SetFilePointer(data->handle, location, NULL, FILE_BEGIN) == INVALID_SET_FILE_POINTER) {
+	if (!SetFilePointerEx(data->handle, make_large_integer(location), NULL, FILE_BEGIN)) {
 		retval = GetLastError();
 		goto error_out;
 	}
@@ -261,14 +269,14 @@ static errcode_t raw_write_blk(io_channel channel,
 	location = ((ext2_loff_t) block * channel->block_size) + data->offset;
 
 	if (data->flags & IO_FLAG_FORCE_BOUNCE) {
-		if (SetFilePointer(data->handle, location, NULL, FILE_BEGIN) == INVALID_SET_FILE_POINTER) {
+		if (!SetFilePointerEx(data->handle, make_large_integer(location), NULL, FILE_BEGIN)) {
 			retval = GetLastError();
 			goto error_out;
 		}
 	goto bounce_write;
 	}
 
-		if (SetFilePointer(data->handle, location, NULL, FILE_BEGIN) == INVALID_SET_FILE_POINTER) {
+		if (!SetFilePointerEx(data->handle, make_large_integer(location), NULL, FILE_BEGIN)) {
 			retval = GetLastError();
 		goto error_out;
 	}
@@ -313,7 +321,7 @@ bounce_write:
 		if (size > channel->block_size)
 			actual = channel->block_size;
 		memcpy(data->bounce, buf, actual);
-		if (SetFilePointer(data->handle, location, NULL, FILE_BEGIN) == INVALID_SET_FILE_POINTER) {
+		if (!SetFilePointerEx(data->handle, make_large_integer(location), NULL, FILE_BEGIN)) {
 			retval = GetLastError();
 			goto error_out;
 		}
@@ -857,17 +865,6 @@ static errcode_t windows_write_byte(io_channel channel, unsigned long offset,
 	return EXT2_ET_UNIMPLEMENTED;
 }
 
-HANDLE windows_get_handle(io_channel channel)
-{
-	struct windows_private_data *data;
-
-	EXT2_CHECK_MAGIC_RETURN(channel, EXT2_ET_MAGIC_IO_CHANNEL, INVALID_HANDLE_VALUE);
-	data = (struct windows_private_data *) channel->private_data;
-	EXT2_CHECK_MAGIC_RETURN(data, EXT2_ET_MAGIC_WINDOWS_IO_CHANNEL, INVALID_HANDLE_VALUE);
-
-	return data->handle;
-}
-
 /*
  * Flush data buffers to disk.
  */