Merge tag 'upstream/12.2'

Upstream version 12.2
Imported Upstream version 12.2
2023-07-01 12:07:26 +02:00 · 2023-07-01 12:07:26 +02:00 · 2021-10-03 10:07:58 +02:00 · 2021-10-03 10:04:54 +02:00 · 2020-09-11 13:43:22 +02:00 · 2020-09-11 13:42:24 +02:00
32 changed files with 1495 additions and 273 deletions
--- a/.version
+++ b/.version
@ -1 +1 @@
-11.6
+12.2
--- a/14
+++ b/14
@ -1,6 +1,20 @@
 SnapRAID HISTORY
 ================

+12.2 2022/08
+============
+ * Fix build issue with GLIBC 2.36
+
+12.1 2022/01
+============
+ * Reduce stack usage to work in environments with limited stack size, like MUSL.
+ * Increase the default disk cache from 8 MiB to 16 MiB.
+
+12.0 2021/12
+============
+ * Parallel disk scanning. It's always enabled but it doesn't cover the -m option
+   that still process disks sequentially.
+
 11.6 2021/10
 ============
 * The 'fix' and 'check' command with the -e option now process the whole
--- a/Makefile.in
+++ b/Makefile.in
@ -1,7 +1,7 @@
-# Makefile.in generated by automake 1.15 from Makefile.am.
+# Makefile.in generated by automake 1.16.2 from Makefile.am.
 # @configure_input@

-# Copyright (C) 1994-2014 Free Software Foundation, Inc.
+# Copyright (C) 1994-2020 Free Software Foundation, Inc.

 # This Makefile.in is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@ -153,7 +153,7 @@ am__v_at_0 = @
 am__v_at_1 = 
 DEFAULT_INCLUDES = -I.@am__isrc@
 depcomp =
-am__depfiles_maybe =
+am__maybe_remake_depfiles =
 COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \
 	$(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
 AM_V_CC = $(am__v_CC_@AM_V@)
@ -205,8 +205,8 @@ man1dir = $(mandir)/man1
 NROFF = nroff
 MANS = $(man_MANS)
 HEADERS = $(noinst_HEADERS)
-am__tagged_files = $(HEADERS) $(SOURCES) $(TAGS_FILES) \
-	$(LISP)config.h.in
+am__tagged_files = $(HEADERS) $(SOURCES) $(TAGS_FILES) $(LISP) \
+	config.h.in
 # Read a list of newline-separated strings from the standard input,
 # and print each of them once, without duplicates.  Input order is
 # *not* preserved.
@ -555,8 +555,8 @@ Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
 	    echo ' $(SHELL) ./config.status'; \
 	    $(SHELL) ./config.status;; \
 	  *) \
-	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $@ $(am__depfiles_maybe)'; \
-	    cd $(top_builddir) && $(SHELL) ./config.status $@ $(am__depfiles_maybe);; \
+	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $@ $(am__maybe_remake_depfiles)'; \
+	    cd $(top_builddir) && $(SHELL) ./config.status $@ $(am__maybe_remake_depfiles);; \
 	esac;

 $(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
@ -809,7 +809,10 @@ distclean-tags:
 	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
 	-rm -f cscope.out cscope.in.out cscope.po.out cscope.files

-distdir: $(DISTFILES)
+distdir: $(BUILT_SOURCES)
+	$(MAKE) $(AM_MAKEFLAGS) distdir-am
+
+distdir-am: $(DISTFILES)
 	$(am__remove_distdir)
 	test -d "$(distdir)" || mkdir "$(distdir)"
 	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
@ -852,7 +855,7 @@ distdir: $(DISTFILES)
 	  ! -type d ! -perm -444 -exec $(install_sh) -c -m a+r {} {} \; \
 	|| chmod -R a+r "$(distdir)"
 dist-gzip: distdir
-	tardir=$(distdir) && $(am__tar) | GZIP=$(GZIP_ENV) gzip -c >$(distdir).tar.gz
+	tardir=$(distdir) && $(am__tar) | eval GZIP= gzip $(GZIP_ENV) -c >$(distdir).tar.gz
 	$(am__post_remove_distdir)

 dist-bzip2: distdir
@ -867,6 +870,10 @@ dist-xz: distdir
 	tardir=$(distdir) && $(am__tar) | XZ_OPT=$${XZ_OPT--e} xz -c >$(distdir).tar.xz
 	$(am__post_remove_distdir)

+dist-zstd: distdir
+	tardir=$(distdir) && $(am__tar) | zstd -c $${ZSTD_CLEVEL-$${ZSTD_OPT--19}} >$(distdir).tar.zst
+	$(am__post_remove_distdir)
+
 dist-tarZ: distdir
 	@echo WARNING: "Support for distribution archives compressed with" \
 		       "legacy program 'compress' is deprecated." >&2
@ -878,7 +885,7 @@ dist-shar: distdir
 	@echo WARNING: "Support for shar distribution archives is" \
 	               "deprecated." >&2
 	@echo WARNING: "It will be removed altogether in Automake 2.0" >&2
-	shar $(distdir) | GZIP=$(GZIP_ENV) gzip -c >$(distdir).shar.gz
+	shar $(distdir) | eval GZIP= gzip $(GZIP_ENV) -c >$(distdir).shar.gz
 	$(am__post_remove_distdir)

 dist-zip: distdir
@ -896,7 +903,7 @@ dist dist-all:
 distcheck: dist
 	case '$(DIST_ARCHIVES)' in \
 	*.tar.gz*) \
-	  GZIP=$(GZIP_ENV) gzip -dc $(distdir).tar.gz | $(am__untar) ;;\
+	  eval GZIP= gzip $(GZIP_ENV) -dc $(distdir).tar.gz | $(am__untar) ;;\
 	*.tar.bz2*) \
 	  bzip2 -dc $(distdir).tar.bz2 | $(am__untar) ;;\
 	*.tar.lz*) \
@ -906,9 +913,11 @@ distcheck: dist
 	*.tar.Z*) \
 	  uncompress -c $(distdir).tar.Z | $(am__untar) ;;\
 	*.shar.gz*) \
-	  GZIP=$(GZIP_ENV) gzip -dc $(distdir).shar.gz | unshar ;;\
+	  eval GZIP= gzip $(GZIP_ENV) -dc $(distdir).shar.gz | unshar ;;\
 	*.zip*) \
 	  unzip $(distdir).zip ;;\
+	*.tar.zst*) \
+	  zstd -dc $(distdir).tar.zst | $(am__untar) ;;\
 	esac
 	chmod -R a-w $(distdir)
 	chmod u+w $(distdir)
@ -1097,20 +1106,20 @@ uninstall-man: uninstall-man1
 	check-local clean clean-binPROGRAMS clean-checkPROGRAMS \
 	clean-cscope clean-generic clean-local cscope cscopelist-am \
 	ctags ctags-am dist dist-all dist-bzip2 dist-gzip dist-hook \
-	dist-lzip dist-shar dist-tarZ dist-xz dist-zip distcheck \
-	distclean distclean-compile distclean-generic distclean-hdr \
-	distclean-tags distcleancheck distdir distuninstallcheck dvi \
-	dvi-am html html-am info info-am install install-am \
-	install-binPROGRAMS install-data install-data-am install-dvi \
-	install-dvi-am install-exec install-exec-am install-html \
-	install-html-am install-info install-info-am install-man \
-	install-man1 install-pdf install-pdf-am install-ps \
-	install-ps-am install-strip installcheck installcheck-am \
-	installdirs maintainer-clean maintainer-clean-generic \
-	maintainer-clean-local mostlyclean mostlyclean-compile \
-	mostlyclean-generic pdf pdf-am ps ps-am tags tags-am uninstall \
-	uninstall-am uninstall-binPROGRAMS uninstall-man \
-	uninstall-man1
+	dist-lzip dist-shar dist-tarZ dist-xz dist-zip dist-zstd \
+	distcheck distclean distclean-compile distclean-generic \
+	distclean-hdr distclean-tags distcleancheck distdir \
+	distuninstallcheck dvi dvi-am html html-am info info-am \
+	install install-am install-binPROGRAMS install-data \
+	install-data-am install-dvi install-dvi-am install-exec \
+	install-exec-am install-html install-html-am install-info \
+	install-info-am install-man install-man1 install-pdf \
+	install-pdf-am install-ps install-ps-am install-strip \
+	installcheck installcheck-am installdirs maintainer-clean \
+	maintainer-clean-generic maintainer-clean-local mostlyclean \
+	mostlyclean-compile mostlyclean-generic pdf pdf-am ps ps-am \
+	tags tags-am uninstall uninstall-am uninstall-binPROGRAMS \
+	uninstall-man uninstall-man1

 .PRECIOUS: Makefile

--- a/aclocal.m4
+++ b/aclocal.m4
@ -1,6 +1,6 @@
-# generated automatically by aclocal 1.15 -*- Autoconf -*-
+# generated automatically by aclocal 1.16.2 -*- Autoconf -*-

-# Copyright (C) 1996-2014 Free Software Foundation, Inc.
+# Copyright (C) 1996-2020 Free Software Foundation, Inc.

 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@ -20,7 +20,7 @@ You have another version of autoconf.  It may work, but is not guaranteed to.
 If you have problems, you may need to regenerate the build system entirely.
 To do so, use the procedure documented by the package, typically 'autoreconf'.])])

-# Copyright (C) 2002-2014 Free Software Foundation, Inc.
+# Copyright (C) 2002-2020 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@ -32,10 +32,10 @@ To do so, use the procedure documented by the package, typically 'autoreconf'.])
 # generated from the m4 files accompanying Automake X.Y.
 # (This private macro should not be called outside this file.)
 AC_DEFUN([AM_AUTOMAKE_VERSION],
-[am__api_version='1.15'
+[am__api_version='1.16'
 dnl Some users find AM_AUTOMAKE_VERSION and mistake it for a way to
 dnl require some minimum version.  Point them to the right macro.
-m4_if([$1], [1.15], [],
+m4_if([$1], [1.16.2], [],
      [AC_FATAL([Do not call $0, use AM_INIT_AUTOMAKE([$1]).])])dnl
 ])

@ -51,14 +51,14 @@ m4_define([_AM_AUTOCONF_VERSION], [])
 # Call AM_AUTOMAKE_VERSION and AM_AUTOMAKE_VERSION so they can be traced.
 # This function is AC_REQUIREd by AM_INIT_AUTOMAKE.
 AC_DEFUN([AM_SET_CURRENT_AUTOMAKE_VERSION],
-[AM_AUTOMAKE_VERSION([1.15])dnl
+[AM_AUTOMAKE_VERSION([1.16.2])dnl
 m4_ifndef([AC_AUTOCONF_VERSION],
  [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl
 _AM_AUTOCONF_VERSION(m4_defn([AC_AUTOCONF_VERSION]))])

 # AM_AUX_DIR_EXPAND                                         -*- Autoconf -*-

-# Copyright (C) 2001-2014 Free Software Foundation, Inc.
+# Copyright (C) 2001-2020 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@ -110,7 +110,7 @@ am_aux_dir=`cd "$ac_aux_dir" && pwd`

 # AM_CONDITIONAL                                            -*- Autoconf -*-

-# Copyright (C) 1997-2014 Free Software Foundation, Inc.
+# Copyright (C) 1997-2020 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@ -143,7 +143,7 @@ fi])])

 # Do all the work for Automake.                             -*- Autoconf -*-

-# Copyright (C) 1996-2014 Free Software Foundation, Inc.
+# Copyright (C) 1996-2020 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@ -230,8 +230,8 @@ AC_REQUIRE([AM_PROG_INSTALL_STRIP])dnl
 AC_REQUIRE([AC_PROG_MKDIR_P])dnl
 # For better backward compatibility.  To be removed once Automake 1.9.x
 # dies out for good.  For more background, see:
-# <http://lists.gnu.org/archive/html/automake/2012-07/msg00001.html>
-# <http://lists.gnu.org/archive/html/automake/2012-07/msg00014.html>
+# <https://lists.gnu.org/archive/html/automake/2012-07/msg00001.html>
+# <https://lists.gnu.org/archive/html/automake/2012-07/msg00014.html>
 AC_SUBST([mkdir_p], ['$(MKDIR_P)'])
 # We need awk for the "check" target (and possibly the TAP driver).  The
 # system "awk" is bad on some platforms.
@ -298,7 +298,7 @@ END
 Aborting the configuration process, to ensure you take notice of the issue.

 You can download and install GNU coreutils to get an 'rm' implementation
-that behaves properly: <http://www.gnu.org/software/coreutils/>.
+that behaves properly: <https://www.gnu.org/software/coreutils/>.

 If you want to complete the configuration process using your problematic
 'rm' anyway, export the environment variable ACCEPT_INFERIOR_RM_PROGRAM
@ -340,7 +340,7 @@ for _am_header in $config_headers :; do
 done
 echo "timestamp for $_am_arg" >`AS_DIRNAME(["$_am_arg"])`/stamp-h[]$_am_stamp_count])

-# Copyright (C) 2001-2014 Free Software Foundation, Inc.
+# Copyright (C) 2001-2020 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@ -361,7 +361,7 @@ if test x"${install_sh+set}" != xset; then
 fi
 AC_SUBST([install_sh])])

-# Copyright (C) 2003-2014 Free Software Foundation, Inc.
+# Copyright (C) 2003-2020 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@ -382,7 +382,7 @@ AC_SUBST([am__leading_dot])])

 # Fake the existence of programs that GNU maintainers use.  -*- Autoconf -*-

-# Copyright (C) 1997-2014 Free Software Foundation, Inc.
+# Copyright (C) 1997-2020 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@ -421,7 +421,7 @@ fi

 # Helper functions for option handling.                     -*- Autoconf -*-

-# Copyright (C) 2001-2014 Free Software Foundation, Inc.
+# Copyright (C) 2001-2020 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@ -450,7 +450,7 @@ AC_DEFUN([_AM_SET_OPTIONS],
 AC_DEFUN([_AM_IF_OPTION],
 [m4_ifset(_AM_MANGLE_OPTION([$1]), [$2], [$3])])

-# Copyright (C) 1999-2014 Free Software Foundation, Inc.
+# Copyright (C) 1999-2020 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@ -497,7 +497,7 @@ AC_LANG_POP([C])])
 # For backward compatibility.
 AC_DEFUN_ONCE([AM_PROG_CC_C_O], [AC_REQUIRE([AC_PROG_CC])])

-# Copyright (C) 2001-2014 Free Software Foundation, Inc.
+# Copyright (C) 2001-2020 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@ -516,7 +516,7 @@ AC_DEFUN([AM_RUN_LOG],

 # Check to make sure that the build environment is sane.    -*- Autoconf -*-

-# Copyright (C) 1996-2014 Free Software Foundation, Inc.
+# Copyright (C) 1996-2020 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@ -597,7 +597,7 @@ AC_CONFIG_COMMANDS_PRE(
 rm -f conftest.file
 ])

-# Copyright (C) 2009-2014 Free Software Foundation, Inc.
+# Copyright (C) 2009-2020 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@ -657,7 +657,7 @@ AC_SUBST([AM_BACKSLASH])dnl
 _AM_SUBST_NOTMAKE([AM_BACKSLASH])dnl
 ])

-# Copyright (C) 2001-2014 Free Software Foundation, Inc.
+# Copyright (C) 2001-2020 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@ -685,7 +685,7 @@ fi
 INSTALL_STRIP_PROGRAM="\$(install_sh) -c -s"
 AC_SUBST([INSTALL_STRIP_PROGRAM])])

-# Copyright (C) 2006-2014 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@ -704,7 +704,7 @@ AC_DEFUN([AM_SUBST_NOTMAKE], [_AM_SUBST_NOTMAKE($@)])

 # Check how to create a tarball.                            -*- Autoconf -*-

-# Copyright (C) 2004-2014 Free Software Foundation, Inc.
+# Copyright (C) 2004-2020 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
--- a/cmdline/elem.h
+++ b/cmdline/elem.h
@ -369,6 +369,13 @@ struct snapraid_disk {
 	 */
 	thread_mutex_t fs_mutex;
 	int fs_mutex_enabled; /*< If the lock has to be used. */
+
+	/**
+	 * Mutex for protecting the scan process.
+	 *
+	 * It's used during the scan process to protect the stampset to identity copy of files
+	 */
+	thread_mutex_t stamp_mutex;
 #endif

 	/**
--- a/cmdline/io.c
+++ b/cmdline/io.c
@ -879,9 +879,9 @@ void io_init(struct snapraid_io* io, struct snapraid_state* state,

 #if HAVE_THREAD
 	if (io_cache == 0) {
-		/* default is 8 MiB of cache */
+		/* default is 16 MiB of cache */
 		/* this seems to be a good tradeoff between speed and memory usage */
-		io->io_max = 8 * 1024 * 1024 / state->block_size;
+		io->io_max = 16 * 1024 * 1024 / state->block_size;
 		if (io->io_max < IO_MIN)
 			io->io_max = IO_MIN;
 		if (io->io_max > IO_MAX)
--- a/cmdline/io.h
+++ b/cmdline/io.h
@ -35,8 +35,8 @@
 *  4  - 452 MB/s, CPU 54%, speed 118%
 *  8  - 487 MB/s, CPU 60%, speed 128%
 * 16  - 505 MB/s, CPU 63%, speed 132%
- * 32  - 520 MB/s, CPU 64%, speed 136%
- * 64  - 524 MB/s, CPU 65%, speed 137%
+ * 32  - 520 MB/s, CPU 64%, speed 136% [SnapRAID <= 12.0]
+ * 64  - 524 MB/s, CPU 65%, speed 137% [SnapRAID > 12.0]
 * 128 - 525 MB/s, CPU 66%, speed 138%
 */
 #define IO_MIN 3 /* required by writers, readers can work also with 2 */
--- a/cmdline/mingw.c
+++ b/cmdline/mingw.c
@ -31,14 +31,26 @@ int exit_sync_needed = 2;
 /* Add missing Windows declaration */

 /* For SetThreadExecutionState */
+#ifndef WIN32_ES_SYSTEM_REQUIRED
 #define WIN32_ES_SYSTEM_REQUIRED      0x00000001L
+#endif
+#ifndef WIN32_ES_DISPLAY_REQUIRED
 #define WIN32_ES_DISPLAY_REQUIRED     0x00000002L
+#endif
+#ifndef WIN32_ES_USER_PRESENT
 #define WIN32_ES_USER_PRESENT         0x00000004L
+#endif
+#ifndef WIN32_ES_AWAYMODE_REQUIRED
 #define WIN32_ES_AWAYMODE_REQUIRED    0x00000040L
+#endif
+#ifndef WIN32_ES_CONTINUOUS
 #define WIN32_ES_CONTINUOUS           0x80000000L
+#endif

 /* File Index */
+#ifndef FILE_INVALID_FILE_ID
 #define FILE_INVALID_FILE_ID          ((ULONGLONG)-1LL)
+#endif

 /**
 * Direct access to RtlGenRandom().
@ -475,7 +487,7 @@ static void windows_attr2stat(DWORD FileAttributes, DWORD ReparseTag, struct win
 */
 static int windows_info2stat(const BY_HANDLE_FILE_INFORMATION* info, const FILE_ATTRIBUTE_TAG_INFO* tag, struct windows_stat* st)
 {
-	uint64_t mtime;
+	int64_t mtime;

 	windows_attr2stat(info->dwFileAttributes, tag->ReparseTag, st);

@ -518,7 +530,7 @@ static int windows_info2stat(const BY_HANDLE_FILE_INFORMATION* info, const FILE_
 	 * "that includes 128-bit file identifiers.  If GetFileInformationByHandle returns"
 	 * "FILE_INVALID_FILE_ID, the identifier may only be described in 128 bit form."
 	 */
-	if (st->st_ino == FILE_INVALID_FILE_ID) {
+	if (st->st_ino == (uint64_t)FILE_INVALID_FILE_ID) {
 		log_fatal("Invalid inode number! Is this ReFS?\n");
 		errno = EINVAL;
 		return -1;
@ -532,7 +544,7 @@ static int windows_info2stat(const BY_HANDLE_FILE_INFORMATION* info, const FILE_
 */
 static int windows_stream2stat(const BY_HANDLE_FILE_INFORMATION* info, const FILE_ID_BOTH_DIR_INFO* stream, struct windows_stat* st)
 {
-	uint64_t mtime;
+	int64_t mtime;

 	/* The FILE_ID_BOTH_DIR_INFO doesn't have the ReparseTag information */
 	/* we could use instead FILE_ID_EXTD_DIR_INFO, but it's available only */
@ -563,7 +575,7 @@ static int windows_stream2stat(const BY_HANDLE_FILE_INFORMATION* info, const FIL
 	st->st_sync = 0;

 	/* in ReFS the IDs are 128 bit, and the 64 bit interface may fail */
-	if (st->st_ino == FILE_INVALID_FILE_ID) {
+	if (st->st_ino == (uint64_t)FILE_INVALID_FILE_ID) {
 		log_fatal("Invalid inode number! Is this ReFS?\n");
 		errno = EINVAL;
 		return -1;
@ -577,7 +589,7 @@ static int windows_stream2stat(const BY_HANDLE_FILE_INFORMATION* info, const FIL
 */
 static void windows_finddata2stat(const WIN32_FIND_DATAW* info, struct windows_stat* st)
 {
-	uint64_t mtime;
+	int64_t mtime;

 	windows_attr2stat(info->dwFileAttributes, info->dwReserved0, st);

@ -789,7 +801,7 @@ static BOOL GetFilePhysicalOffset(HANDLE h, uint64_t* physical)
 	BOOL ret;
 	DWORD n;

-	/* in Wine FSCTL_GET_RETRIVIAL_POINTERS is not supported */
+	/* in Wine FSCTL_GET_RETRIEVAL_POINTERS is not supported */
 	if (is_wine) {
 		*physical = FILEPHY_UNREPORTED_OFFSET;
 		return TRUE;
@ -1039,7 +1051,7 @@ int windows_futimens(int fd, struct windows_timespec tv[2])
 {
 	HANDLE h;
 	FILETIME ft;
-	uint64_t mtime;
+	int64_t mtime;

 	if (fd == -1) {
 		errno = EBADF;
@ -1061,7 +1073,7 @@ int windows_futimens(int fd, struct windows_timespec tv[2])
 	mtime = tv[0].tv_sec;
 	mtime *= 10000000;
 	mtime += tv[0].tv_nsec / 100;
-	mtime += 116444736000000000;
+	mtime += 116444736000000000LL;

 	ft.dwHighDateTime = mtime >> 32;
 	ft.dwLowDateTime = mtime;
@ -1079,7 +1091,7 @@ int windows_utimensat(int fd, const char* file, struct windows_timespec tv[2], i
 	wchar_t conv_buf[CONV_MAX];
 	HANDLE h;
 	FILETIME ft;
-	uint64_t mtime;
+	int64_t mtime;
 	DWORD wflags;

 	/*
@ -1119,7 +1131,7 @@ int windows_utimensat(int fd, const char* file, struct windows_timespec tv[2], i
 	mtime = tv[0].tv_sec;
 	mtime *= 10000000;
 	mtime += tv[0].tv_nsec / 100;
-	mtime += 116444736000000000;
+	mtime += 116444736000000000LL;

 	ft.dwHighDateTime = mtime >> 32;
 	ft.dwLowDateTime = mtime;
@ -1556,7 +1568,7 @@ int windows_link(const char* existing, const char* file)
 }

 /**
- * In Windows 10 allow creation of symblink by not privileged user.
+ * In Windows 10 allow creation of symlink by not privileged user.
 *
 * See: Symlinks in Windows 10!
 * https://blogs.windows.com/buildingapps/2016/12/02/symlinks-windows-10/#cQG7cx48oGH86lkI.97
--- a/cmdline/portable.h
+++ b/cmdline/portable.h
@ -362,7 +362,7 @@ int devuuid(uint64_t device, char* uuid, size_t size);
 #define FILEPHY_REAL_OFFSET 3

 /**
- * Get the physcal address of the specified file.
+ * Get the physical address of the specified file.
 * This is expected to be just a hint and not necessarily correct or unique.
 * Return 0 on success.
 */
--- a/cmdline/scan.c
+++ b/cmdline/scan.c
@ -25,6 +25,17 @@
 struct snapraid_scan {
 	struct snapraid_state* state; /**< State used. */
 	struct snapraid_disk* disk; /**< Disk used. */
+	thread_id_t thread; /**< Thread used for scanning the disk */
+
+	int is_diff; /**< If it's a diff command or a scanning */
+	int need_write; /**< If a state write is required */
+
+#if HAVE_THREAD
+	/**
+	 * Mutex for protecting the disk stampset table
+	 */
+	thread_mutex_t mutex;
+#endif

 	/**
 	 * Counters of changes.
@ -45,16 +56,69 @@ struct snapraid_scan {
 	tommy_node node;
 };

+static struct snapraid_scan* scan_alloc(struct snapraid_state* state, struct snapraid_disk* disk, int is_diff)
+{
+	struct snapraid_scan* scan;
+
+	scan = malloc_nofail(sizeof(struct snapraid_scan));
+	scan->state = state;
+	scan->disk = disk;
+	scan->count_equal = 0;
+	scan->count_move = 0;
+	scan->count_copy = 0;
+	scan->count_restore = 0;
+	scan->count_change = 0;
+	scan->count_remove = 0;
+	scan->count_insert = 0;
+	tommy_list_init(&scan->file_insert_list);
+	tommy_list_init(&scan->link_insert_list);
+	tommy_list_init(&scan->dir_insert_list);
+	scan->is_diff = is_diff;
+	scan->need_write = 0;
+
+#if HAVE_THREAD
+	thread_mutex_init(&disk->stamp_mutex);
+#endif
+
+	return scan;
+}
+
+static void scan_free(struct snapraid_scan* scan)
+{
+#if HAVE_THREAD
+	thread_mutex_destroy(&scan->disk->stamp_mutex);
+#endif
+
+	free(scan);
+}
+
+static void stamp_lock(struct snapraid_disk* disk)
+{
+#if HAVE_THREAD
+	thread_mutex_lock(&disk->stamp_mutex);
+#else
+	(void)disk;
+#endif
+}
+
+static void stamp_unlock(struct snapraid_disk* disk)
+{
+#if HAVE_THREAD
+	thread_mutex_unlock(&disk->stamp_mutex);
+#else
+	(void)disk;
+#endif
+}
+
 /**
 * Remove the specified link from the data set.
 */
 static void scan_link_remove(struct snapraid_scan* scan, struct snapraid_link* slink)
 {
-	struct snapraid_state* state = scan->state;
 	struct snapraid_disk* disk = scan->disk;

 	/* state changed */
-	state->need_write = 1;
+	scan->need_write = 1;

 	/* remove the file from the link containers */
 	tommy_hashdyn_remove_existing(&disk->linkset, &slink->nodeset);
@ -69,11 +133,10 @@ static void scan_link_remove(struct snapraid_scan* scan, struct snapraid_link* s
 */
 static void scan_link_insert(struct snapraid_scan* scan, struct snapraid_link* slink)
 {
-	struct snapraid_state* state = scan->state;
 	struct snapraid_disk* disk = scan->disk;

 	/* state changed */
-	state->need_write = 1;
+	scan->need_write = 1;

 	/* insert the link in the link containers */
 	tommy_hashdyn_insert(&disk->linkset, &slink->nodeset, slink, link_name_hash(slink->sub));
@ -116,13 +179,13 @@ static void scan_link(struct snapraid_scan* scan, int is_diff, const char* sub,
 			/* it's an update */

 			/* we have to save the linkto/type */
-			state->need_write = 1;
+			scan->need_write = 1;

 			++scan->count_change;

 			log_tag("scan:update:%s:%s\n", disk->name, esc_tag(slink->sub, esc_buffer));
 			if (is_diff) {
-				printf("update %s\n", fmt_term(disk, slink->sub, esc_buffer));
+				msg_info("update %s\n", fmt_term(disk, slink->sub, esc_buffer));
 			}

 			/* update it */
@ -139,7 +202,7 @@ static void scan_link(struct snapraid_scan* scan, int is_diff, const char* sub,

 		log_tag("scan:add:%s:%s\n", disk->name, esc_tag(sub, esc_buffer));
 		if (is_diff) {
-			printf("add %s\n", fmt_term(disk, sub, esc_buffer));
+			msg_info("add %s\n", fmt_term(disk, sub, esc_buffer));
 		}

 		/* and continue to insert it */
@ -166,7 +229,7 @@ static void scan_file_allocate(struct snapraid_scan* scan, struct snapraid_file*
 	block_off_t parity_pos;

 	/* state changed */
-	state->need_write = 1;
+	scan->need_write = 1;

 	/* allocate the blocks of the file */
 	parity_pos = disk->first_free_block;
@ -267,7 +330,7 @@ static void scan_file_deallocate(struct snapraid_scan* scan, struct snapraid_fil
 	tommy_list_remove_existing(&disk->filelist, &file->nodelist);

 	/* state changed */
-	state->need_write = 1;
+	scan->need_write = 1;

 	/* here we are supposed to adjust the ::first_free_block position */
 	/* with the parity position we are deleting */
@ -563,8 +626,11 @@ static void scan_file_insert(struct snapraid_scan* scan, struct snapraid_file* f
 	/* insert the file in the containers */
 	if (!file_flag_has(file, FILE_IS_WITHOUT_INODE))
 		tommy_hashdyn_insert(&disk->inodeset, &file->nodeset, file, file_inode_hash(file->inode));
+
+	stamp_lock(disk);
 	tommy_hashdyn_insert(&disk->pathset, &file->pathset, file, file_path_hash(file->sub));
 	tommy_hashdyn_insert(&disk->stampset, &file->stampset, file, file_stamp_hash(file->size, file->mtime_sec, file->mtime_nsec));
+	stamp_unlock(disk);

 	/* delayed allocation of the parity */
 	scan_file_delayed_allocate(scan, file);
@ -583,7 +649,10 @@ static void scan_file_remove(struct snapraid_scan* scan, struct snapraid_file* f
 	if (!file_flag_has(file, FILE_IS_WITHOUT_INODE))
 		tommy_hashdyn_remove_existing(&disk->inodeset, &file->nodeset);
 	tommy_hashdyn_remove_existing(&disk->pathset, &file->pathset);
+
+	stamp_lock(disk);
 	tommy_hashdyn_remove_existing(&disk->stampset, &file->stampset);
+	stamp_unlock(disk);

 	/* deallocate the file from the parity */
 	scan_file_deallocate(scan, file);
@ -706,7 +775,7 @@ static void scan_file(struct snapraid_scan* scan, int is_diff, const char* sub,
 				file->mtime_nsec = STAT_NSEC(st);

 				/* we have to save the new mtime */
-				state->need_write = 1;
+				scan->need_write = 1;
 			}

 			if (strcmp(file->sub, sub) != 0) {
@ -715,7 +784,7 @@ static void scan_file(struct snapraid_scan* scan, int is_diff, const char* sub,

 				log_tag("scan:move:%s:%s:%s\n", disk->name, esc_tag(file->sub, esc_buffer), esc_tag(sub, esc_buffer_alt));
 				if (is_diff) {
-					printf("move %s -> %s\n", fmt_term(disk, file->sub, esc_buffer), fmt_term(disk, sub, esc_buffer_alt));
+					msg_info("move %s -> %s\n", fmt_term(disk, file->sub, esc_buffer), fmt_term(disk, sub, esc_buffer_alt));
 				}

 				/* remove from the name set */
@ -728,7 +797,7 @@ static void scan_file(struct snapraid_scan* scan, int is_diff, const char* sub,
 				tommy_hashdyn_insert(&disk->pathset, &file->pathset, file, file_path_hash(file->sub));

 				/* we have to save the new name */
-				state->need_write = 1;
+				scan->need_write = 1;
 			} else {
 				/* otherwise it's equal */
 				++scan->count_equal;
@ -864,7 +933,7 @@ static void scan_file(struct snapraid_scan* scan, int is_diff, const char* sub,
 				file->mtime_nsec = STAT_NSEC(st);

 				/* we have to save the new mtime */
-				state->need_write = 1;
+				scan->need_write = 1;
 			}

 			/* if when processing the disk we used the past inodes values */
@ -878,7 +947,7 @@ static void scan_file(struct snapraid_scan* scan, int is_diff, const char* sub,

 				log_tag("scan:restore:%s:%s\n", disk->name, esc_tag(sub, esc_buffer));
 				if (is_diff) {
-					printf("restore %s\n", fmt_term(disk, sub, esc_buffer));
+					msg_info("restore %s\n", fmt_term(disk, sub, esc_buffer));
 				}

 				/* remove from the inode set */
@ -891,7 +960,7 @@ static void scan_file(struct snapraid_scan* scan, int is_diff, const char* sub,
 				tommy_hashdyn_insert(&disk->inodeset, &file->nodeset, file, file_inode_hash(file->inode));

 				/* we have to save the new inode */
-				state->need_write = 1;
+				scan->need_write = 1;
 			} else {
 				/* otherwise it's the case of not persistent inode, where doesn't */
 				/* matter if the inode is different or equal, because they have no */
@ -976,12 +1045,14 @@ static void scan_file(struct snapraid_scan* scan, int is_diff, const char* sub,
 			struct snapraid_disk* other_disk = i->data;
 			struct snapraid_file* other_file;

+			stamp_lock(other_disk);
 			/* if the nanosecond part of the time stamp is valid, search */
 			/* for name and stamp, otherwise for path and stamp */
 			if (file->mtime_nsec != 0 && file->mtime_nsec != STAT_NSEC_INVALID)
 				other_file = tommy_hashdyn_search(&other_disk->stampset, file_namestamp_compare, file, hash);
 			else
 				other_file = tommy_hashdyn_search(&other_disk->stampset, file_pathstamp_compare, file, hash);
+			stamp_unlock(other_disk);

 			/* if found, and it's a fully hashed file */
 			if (other_file && file_is_full_hashed_and_stable(scan->state, other_disk, other_file)) {
@ -993,7 +1064,7 @@ static void scan_file(struct snapraid_scan* scan, int is_diff, const char* sub,

 				log_tag("scan:copy:%s:%s:%s:%s\n", other_disk->name, esc_tag(other_file->sub, esc_buffer), disk->name, esc_tag(file->sub, esc_buffer_alt));
 				if (is_diff) {
-					printf("copy %s -> %s\n", fmt_term(other_disk, other_file->sub, esc_buffer), fmt_term(disk, file->sub, esc_buffer_alt));
+					msg_info("copy %s -> %s\n", fmt_term(other_disk, other_file->sub, esc_buffer), fmt_term(disk, file->sub, esc_buffer_alt));
 				}

 				/* mark it as reported */
@ -1017,14 +1088,14 @@ static void scan_file(struct snapraid_scan* scan, int is_diff, const char* sub,
 			);

 			if (is_diff) {
-				printf("update %s\n", fmt_term(disk, sub, esc_buffer));
+				msg_info("update %s\n", fmt_term(disk, sub, esc_buffer));
 			}
 		} else {
 			++scan->count_insert;

 			log_tag("scan:add:%s:%s\n", disk->name, esc_tag(sub, esc_buffer));
 			if (is_diff) {
-				printf("add %s\n", fmt_term(disk, sub, esc_buffer));
+				msg_info("add %s\n", fmt_term(disk, sub, esc_buffer));
 			}
 		}
 	}
@ -1038,11 +1109,10 @@ static void scan_file(struct snapraid_scan* scan, int is_diff, const char* sub,
 */
 static void scan_emptydir_remove(struct snapraid_scan* scan, struct snapraid_dir* dir)
 {
-	struct snapraid_state* state = scan->state;
 	struct snapraid_disk* disk = scan->disk;

 	/* state changed */
-	state->need_write = 1;
+	scan->need_write = 1;

 	/* remove the file from the dir containers */
 	tommy_hashdyn_remove_existing(&disk->dirset, &dir->nodeset);
@ -1057,11 +1127,10 @@ static void scan_emptydir_remove(struct snapraid_scan* scan, struct snapraid_dir
 */
 static void scan_emptydir_insert(struct snapraid_scan* scan, struct snapraid_dir* dir)
 {
-	struct snapraid_state* state = scan->state;
 	struct snapraid_disk* disk = scan->disk;

 	/* state changed */
-	state->need_write = 1;
+	scan->need_write = 1;

 	/* insert the dir in the dir containers */
 	tommy_hashdyn_insert(&disk->dirset, &dir->nodeset, dir, dir_name_hash(dir->sub));
@ -1172,7 +1241,7 @@ struct stat* dstat(const char* file, struct stat* st)
 * Process a directory.
 * Return != 0 if at least one file or link is processed.
 */
-static int scan_dir(struct snapraid_scan* scan, int level, int is_diff, const char* dir, const char* sub)
+static int scan_sub(struct snapraid_scan* scan, int level, int is_diff, char* path_next, char* sub_next, char* tmp)
 {
 	struct snapraid_state* state = scan->state;
 	struct snapraid_disk* disk = scan->disk;
@ -1180,25 +1249,28 @@ static int scan_dir(struct snapraid_scan* scan, int level, int is_diff, const ch
 	DIR* d;
 	tommy_list list;
 	tommy_node* node;
+	size_t path_len;
+	size_t sub_len;
+
+	path_len = strlen(path_next);
+	sub_len = strlen(sub_next);

 	tommy_list_init(&list);

-	d = opendir(dir);
+	d = opendir(path_next);
 	if (!d) {
 		/* LCOV_EXCL_START */
-		log_fatal("Error opening directory '%s'. %s.\n", dir, strerror(errno));
+		log_fatal("Error opening directory '%s'. %s.\n", path_next, strerror(errno));
 		if (level == 0)
 			log_fatal("If this is the disk mount point, remember to create it manually\n");
 		else
-			log_fatal("If it's a permission problem, you can exclude it in the config file with:\n\texclude /%s\n", sub);
+			log_fatal("If it's a permission problem, you can exclude it in the config file with:\n\texclude /%s\n", sub_next);
 		exit(EXIT_FAILURE);
 		/* LCOV_EXCL_STOP */
 	}

 	/* read the full directory */
 	while (1) {
-		char path_next[PATH_MAX];
-		char sub_next[PATH_MAX];
 		struct dirent_sorted* entry;
 		const char* name;
 		struct dirent* dd;
@ -1215,8 +1287,11 @@ static int scan_dir(struct snapraid_scan* scan, int level, int is_diff, const ch
 		dd = readdir(d);
 		if (dd == 0 && errno != 0) {
 			/* LCOV_EXCL_START */
-			log_fatal("Error reading directory '%s'. %s.\n", dir, strerror(errno));
-			log_fatal("You can exclude it in the config file with:\n\texclude /%s\n", sub);
+			/* restore removing additions */
+			path_next[path_len] = 0;
+			sub_next[sub_len] = 0;
+			log_fatal("Error reading directory '%s'. %s.\n", path_next, strerror(errno));
+			log_fatal("You can exclude it in the config file with:\n\texclude /%s\n", sub_next);
 			exit(EXIT_FAILURE);
 			/* LCOV_EXCL_STOP */
 		}
@ -1229,8 +1304,7 @@ static int scan_dir(struct snapraid_scan* scan, int level, int is_diff, const ch
 		if (name[0] == '.' && (name[1] == 0 || (name[1] == '.' && name[2] == 0)))
 			continue;

-		pathprint(path_next, sizeof(path_next), "%s%s", dir, name);
-		pathprint(sub_next, sizeof(sub_next), "%s%s", sub, name);
+		pathcatl(path_next, path_len, PATH_MAX, name);

 		/* check for not supported file names */
 		if (name[0] == 0) {
@ -1276,7 +1350,9 @@ static int scan_dir(struct snapraid_scan* scan, int level, int is_diff, const ch

 	if (closedir(d) != 0) {
 		/* LCOV_EXCL_START */
-		log_fatal("Error closing directory '%s'. %s.\n", dir, strerror(errno));
+		/* restore removing additions */
+		path_next[path_len] = 0;
+		log_fatal("Error closing directory '%s'. %s.\n", path_next, strerror(errno));
 		exit(EXIT_FAILURE);
 		/* LCOV_EXCL_STOP */
 	}
@ -1299,9 +1375,6 @@ static int scan_dir(struct snapraid_scan* scan, int level, int is_diff, const ch
 	/* process the sorted dir entries */
 	node = list;
 	while (node != 0) {
-		char path_next[PATH_MAX];
-		char sub_next[PATH_MAX];
-		char out[PATH_MAX];
 		struct snapraid_filter* reason = 0;
 		struct dirent_sorted* dd = node->data;
 		const char* name = dd->d_name;
@ -1311,8 +1384,8 @@ static int scan_dir(struct snapraid_scan* scan, int level, int is_diff, const ch
 		struct stat st_buf;
 #endif

-		pathprint(path_next, sizeof(path_next), "%s%s", dir, name);
-		pathprint(sub_next, sizeof(sub_next), "%s%s", sub, name);
+		pathcatl(path_next, path_len, PATH_MAX, name);
+		pathcatl(sub_next, sub_len, PATH_MAX, name);

 		/* start with an unknown type */
 		type = -1;
@ -1383,14 +1456,13 @@ static int scan_dir(struct snapraid_scan* scan, int level, int is_diff, const ch
 				scan_file(scan, is_diff, sub_next, st, FILEPHY_UNREAD_OFFSET);
 				processed = 1;
 			} else {
-				msg_verbose("Excluding file '%s' for rule '%s'\n", path_next, filter_type(reason, out, sizeof(out)));
+				msg_verbose("Excluding file '%s' for rule '%s'\n", path_next, filter_type(reason, tmp, PATH_MAX));
 			}
 		} else if (type == 1) { /* LNK */
 			if (filter_path(&state->filterlist, &reason, disk->name, sub_next) == 0) {
-				char subnew[PATH_MAX];
 				int ret;

-				ret = readlink(path_next, subnew, sizeof(subnew));
+				ret = readlink(path_next, tmp, PATH_MAX);
 				if (ret >= PATH_MAX) {
 					/* LCOV_EXCL_START */
 					log_fatal("Error in readlink file '%s'. Symlink too long.\n", path_next);
@ -1407,13 +1479,13 @@ static int scan_dir(struct snapraid_scan* scan, int level, int is_diff, const ch
 					log_fatal("WARNING! Empty symbolic link '%s'.\n", path_next);

 				/* readlink doesn't put the final 0 */
-				subnew[ret] = 0;
+				tmp[ret] = 0;

 				/* process as a symbolic link */
-				scan_link(scan, is_diff, sub_next, subnew, FILE_IS_SYMLINK);
+				scan_link(scan, is_diff, sub_next, tmp, FILE_IS_SYMLINK);
 				processed = 1;
 			} else {
-				msg_verbose("Excluding link '%s' for rule '%s'\n", path_next, filter_type(reason, out, sizeof(out)));
+				msg_verbose("Excluding link '%s' for rule '%s'\n", path_next, filter_type(reason, tmp, PATH_MAX));
 			}
 		} else if (type == 2) { /* DIR */
 			if (filter_subdir(&state->filterlist, &reason, disk->name, sub_next) == 0) {
@ -1429,13 +1501,12 @@ static int scan_dir(struct snapraid_scan* scan, int level, int is_diff, const ch
 				} else
 #endif
 				{
-					char sub_dir[PATH_MAX];
-
 					/* recurse */
-					pathslash(path_next, sizeof(path_next));
-					pathcpy(sub_dir, sizeof(sub_dir), sub_next);
-					pathslash(sub_dir, sizeof(sub_dir));
-					if (scan_dir(scan, level + 1, is_diff, path_next, sub_dir) == 0) {
+					pathslash(path_next, PATH_MAX);
+					pathslash(sub_next, PATH_MAX);
+					if (scan_sub(scan, level + 1, is_diff, path_next, sub_next, tmp) == 0) {
+						/* restore removing additions */
+						pathcatl(sub_next, sub_len, PATH_MAX, name);
 						/* scan the directory as empty dir */
 						scan_emptydir(scan, sub_next);
 					}
@ -1443,7 +1514,7 @@ static int scan_dir(struct snapraid_scan* scan, int level, int is_diff, const ch
 					processed = 1;
 				}
 			} else {
-				msg_verbose("Excluding directory '%s' for rule '%s'\n", path_next, filter_type(reason, out, sizeof(out)));
+				msg_verbose("Excluding directory '%s' for rule '%s'\n", path_next, filter_type(reason, tmp, PATH_MAX));
 			}
 		} else {
 			if (filter_path(&state->filterlist, &reason, disk->name, sub_next) == 0) {
@ -1453,7 +1524,7 @@ static int scan_dir(struct snapraid_scan* scan, int level, int is_diff, const ch

 				log_fatal("WARNING! Ignoring special '%s' file '%s'\n", stat_desc(st), path_next);
 			} else {
-				msg_verbose("Excluding special file '%s' for rule '%s'\n", path_next, filter_type(reason, out, sizeof(out)));
+				msg_verbose("Excluding special file '%s' for rule '%s'\n", path_next, filter_type(reason, tmp, PATH_MAX));
 			}
 		}

@ -1467,6 +1538,80 @@ static int scan_dir(struct snapraid_scan* scan, int level, int is_diff, const ch
 	return processed;
 }

+/**
+ * Process a directory.
+ * Return != 0 if at least one file or link is processed.
+ */
+static int scan_dir(struct snapraid_scan* scan, int level, int is_diff, const char* dir, const char* sub)
+{
+	/* working buffers used by scan_sub() */
+	char path_next[PATH_MAX];
+	char sub_next[PATH_MAX];
+	char tmp[PATH_MAX];
+
+	pathcpy(path_next, sizeof(path_next), dir);
+	pathcpy(sub_next, sizeof(sub_next), sub);
+
+	return scan_sub(scan, level, is_diff, path_next, sub_next, tmp);
+}
+
+static void* scan_disk(void* arg)
+{
+	struct snapraid_scan* scan = arg;
+	struct snapraid_disk* disk = scan->disk;
+	int ret;
+	int has_persistent_inodes;
+	int has_syncronized_hardlinks;
+	uint64_t start;
+
+	/* check if the disk supports persistent inodes */
+	ret = fsinfo(disk->dir, &has_persistent_inodes, &has_syncronized_hardlinks, 0, 0);
+	if (ret < 0) {
+		/* LCOV_EXCL_START */
+		log_fatal("Error accessing disk '%s' to get file-system info. %s.\n", disk->dir, strerror(errno));
+		exit(EXIT_FAILURE);
+		/* LCOV_EXCL_STOP */
+	}
+	if (!has_persistent_inodes) {
+		disk->has_volatile_inodes = 1;
+	}
+	if (!has_syncronized_hardlinks) {
+		disk->has_volatile_hardlinks = 1;
+	}
+
+	/* if inodes or UUID are not persistent/changed/unsupported */
+	if (disk->has_volatile_inodes || disk->has_different_uuid || disk->has_unsupported_uuid) {
+		/* remove all the inodes from the inode collection */
+		/* if they are not persistent, all of them could be changed now */
+		/* and we don't want to find false matching ones */
+		/* see scan_file() for more details */
+		tommy_node* node = disk->filelist;
+		while (node) {
+			struct snapraid_file* file = node->data;
+
+			node = node->next;
+
+			/* remove from the inode set */
+			tommy_hashdyn_remove_existing(&disk->inodeset, &file->nodeset);
+
+			/* clear the inode */
+			file->inode = 0;
+
+			/* mark as missing inode */
+			file_flag_set(file, FILE_IS_WITHOUT_INODE);
+		}
+	}
+
+	start = tick_ms();
+
+	scan_dir(scan, 0, scan->is_diff, disk->dir, "");
+
+	if (!scan->is_diff)
+		msg_progress("Scanned %s in %" PRIu64 " seconds\n", disk->name, (tick_ms() - start) / 1000);
+
+	return 0;
+}
+
 static int state_diffscan(struct snapraid_state* state, int is_diff)
 {
 	tommy_node* i;
@ -1482,76 +1627,44 @@ static int state_diffscan(struct snapraid_state* state, int is_diff)

 	if (is_diff)
 		msg_progress("Comparing...\n");
+	else
+		msg_progress("Scanning...\n");

-	/* first scan all the directory and find new and deleted files */
+	/* allocate all the scan data */
 	for (i = state->disklist; i != 0; i = i->next) {
 		struct snapraid_disk* disk = i->data;
 		struct snapraid_scan* scan;
-		tommy_node* node;
-		int ret;
-		int has_persistent_inodes;
-		int has_syncronized_hardlinks;

-		scan = malloc_nofail(sizeof(struct snapraid_scan));
-		scan->state = state;
-		scan->disk = disk;
-		scan->count_equal = 0;
-		scan->count_move = 0;
-		scan->count_copy = 0;
-		scan->count_restore = 0;
-		scan->count_change = 0;
-		scan->count_remove = 0;
-		scan->count_insert = 0;
-		tommy_list_init(&scan->file_insert_list);
-		tommy_list_init(&scan->link_insert_list);
-		tommy_list_init(&scan->dir_insert_list);
+		scan = scan_alloc(state, disk, is_diff);

 		tommy_list_insert_tail(&scanlist, &scan->node, scan);
-
-		if (!is_diff)
-			msg_progress("Scanning disk %s...\n", disk->name);
-
-		/* check if the disk supports persistent inodes */
-		ret = fsinfo(disk->dir, &has_persistent_inodes, &has_syncronized_hardlinks, 0, 0);
-		if (ret < 0) {
-			/* LCOV_EXCL_START */
-			log_fatal("Error accessing disk '%s' to get file-system info. %s.\n", disk->dir, strerror(errno));
-			exit(EXIT_FAILURE);
-			/* LCOV_EXCL_STOP */
-		}
-		if (!has_persistent_inodes) {
-			disk->has_volatile_inodes = 1;
-		}
-		if (!has_syncronized_hardlinks) {
-			disk->has_volatile_hardlinks = 1;
-		}
-
-		/* if inodes or UUID are not persistent/changed/unsupported */
-		if (disk->has_volatile_inodes || disk->has_different_uuid || disk->has_unsupported_uuid) {
-			/* remove all the inodes from the inode collection */
-			/* if they are not persistent, all of them could be changed now */
-			/* and we don't want to find false matching ones */
-			/* see scan_file() for more details */
-			node = disk->filelist;
-			while (node) {
-				struct snapraid_file* file = node->data;
-
-				node = node->next;
-
-				/* remove from the inode set */
-				tommy_hashdyn_remove_existing(&disk->inodeset, &file->nodeset);
-
-				/* clear the inode */
-				file->inode = 0;
-
-				/* mark as missing inode */
-				file_flag_set(file, FILE_IS_WITHOUT_INODE);
-			}
-		}
-
-		scan_dir(scan, 0, is_diff, disk->dir, "");
 	}

+	/* first scan all the directory and find new and deleted files */
+	for (i = scanlist; i != 0; i = i->next) {
+		struct snapraid_scan* scan = i->data;
+#if HAVE_THREAD
+		if (state->opt.skip_multi_scan)
+			scan_disk(scan);
+		else
+			thread_create(&scan->thread, scan_disk, scan);
+#else
+		scan_disk(scan);
+#endif
+	}
+
+#if HAVE_THREAD
+	/* wait for all threads to terminate */
+	for (i = scanlist; i != 0; i = i->next) {
+		struct snapraid_scan* scan = i->data;
+		void* retval;
+
+		/* wait for thread termination */
+		if (!state->opt.skip_multi_scan)
+			thread_join(scan->thread, &retval);
+	}
+#endif
+
 	/* we split the search in two phases because to detect files */
 	/* moved from one disk to another we have to start deletion */
 	/* only when all disks have all the new files found */
@ -1580,7 +1693,7 @@ static int state_diffscan(struct snapraid_state* state, int is_diff)

 				log_tag("scan:remove:%s:%s\n", disk->name, esc_tag(file->sub, esc_buffer));
 				if (is_diff) {
-					printf("remove %s\n", fmt_term(disk, file->sub, esc_buffer));
+					msg_info("remove %s\n", fmt_term(disk, file->sub, esc_buffer));
 				}

 				scan_file_remove(scan, file);
@ -1601,7 +1714,7 @@ static int state_diffscan(struct snapraid_state* state, int is_diff)

 				log_tag("scan:remove:%s:%s\n", disk->name, esc_tag(slink->sub, esc_buffer));
 				if (is_diff) {
-					printf("remove %s\n", fmt_term(disk, slink->sub, esc_buffer));
+					msg_info("remove %s\n", fmt_term(disk, slink->sub, esc_buffer));
 				}

 				scan_link_remove(scan, slink);
@ -1707,6 +1820,14 @@ static int state_diffscan(struct snapraid_state* state, int is_diff)
 		}
 	}

+	/* propagate the state change (after all the scan operations are called) */
+	for (i = scanlist; i != 0; i = i->next) {
+		struct snapraid_scan* scan = i->data;
+		if (scan->need_write) {
+			state->need_write = 1;
+		}
+	}
+
 	/* check for disks where all the previously existing files where removed */
 	if (!state->opt.force_empty) {
 		int all_missing = 0;
@ -1896,7 +2017,7 @@ static int state_diffscan(struct snapraid_state* state, int is_diff)
 	}
 	log_flush();

-	tommy_list_foreach(&scanlist, (tommy_foreach_func*)free);
+	tommy_list_foreach(&scanlist, (tommy_foreach_func*)scan_free);

 	/* check the file-system on all disks */
 	state_fscheck(state, "after scan");
--- a/cmdline/snapraid.c
+++ b/cmdline/snapraid.c
@ -307,6 +307,7 @@ void config(char* conf, size_t conf_size, const char* argv0)
 #define OPT_TEST_SKIP_CONTENT_WRITE 302
 #define OPT_TEST_SKIP_SPACE_HOLDER 303
 #define OPT_TEST_FORMAT 304
+#define OPT_TEST_SKIP_MULTI_SCAN 305

 #if HAVE_GETOPT_LONG
 struct option long_options[] = {
@ -475,6 +476,9 @@ struct option long_options[] = {
 	/* Set the output format */
 	{ "test-fmt", 1, 0, OPT_TEST_FORMAT },

+	/* Skip thread in disk scan */
+	{ "test-skip-multi-scan", 0, 0, OPT_TEST_SKIP_MULTI_SCAN },
+
 	{ 0, 0, 0, 0 }
 };
 #endif
@ -929,6 +933,9 @@ int main(int argc, char* argv[])
 				/* LCOV_EXCL_STOP */
 			}
 			break;
+		case OPT_TEST_SKIP_MULTI_SCAN :
+			opt.skip_multi_scan = 1;
+			break;
 		default :
 			/* LCOV_EXCL_START */
 			log_fatal("Unknown option '%c'\n", (char)c);
--- a/cmdline/state.c
+++ b/cmdline/state.c
@ -37,10 +37,6 @@
 * writing to disk, but you'll need to access multiple times the same data,
 * being potentially slower.
 *
- * For upcoming SnapRAID version it's planned to add a mutex protection
- * at the file-system structure, slowing down multiple data access,
- * so we disable it.
- *
 * Multi thread for verify is instead always generally faster,
 * so we enable it if possible.
 */
@ -3904,6 +3900,8 @@ static void state_verify_content(struct snapraid_state* state, uint32_t crc)
 	tommy_node* i;
 	int fail;

+	msg_progress("Verifying...\n");
+
 	/* start all reading threads */
 	i = tommy_list_head(&state->contentlist);
 	while (i) {
@ -3912,8 +3910,6 @@ static void state_verify_content(struct snapraid_state* state, uint32_t crc)
 		char tmp[PATH_MAX];
 		STREAM* f;

-		msg_progress("Verifying %s...\n", content->content);
-
 		pathprint(tmp, sizeof(tmp), "%s.tmp", content->content);
 		f = sopen_read(tmp);
 		if (f == 0) {
--- a/cmdline/state.h
+++ b/cmdline/state.h
@ -119,6 +119,7 @@ struct snapraid_option {
 	int auto_conf; /**< Allow to run without configuration file. */
 	int force_stats; /**< Force stats print during process. */
 	uint64_t parity_limit_size; /**< Test limit for parity files. */
+	int skip_multi_scan; /**< Don't use threads in scan. */
 };

 struct snapraid_state {
--- a/cmdline/support.c
+++ b/cmdline/support.c
@ -663,6 +663,20 @@ void pathcat(char* dst, size_t size, const char* src)
 	memcpy(dst + dst_len, src, src_len + 1);
 }

+void pathcatl(char* dst, size_t dst_len, size_t size, const char* src)
+{
+	size_t src_len = strlen(src);
+
+	if (dst_len + src_len + 1 > size) {
+		/* LCOV_EXCL_START */
+		log_fatal("Path too long '%s%s'\n", dst, src);
+		os_abort();
+		/* LCOV_EXCL_STOP */
+	}
+
+	memcpy(dst + dst_len, src, src_len + 1);
+}
+
 void pathcatc(char* dst, size_t size, char c)
 {
 	size_t dst_len = strlen(dst);
--- a/cmdline/support.h
+++ b/cmdline/support.h
@ -265,6 +265,12 @@ void pathcpy(char* dst, size_t size, const char* src);
 */
 void pathcat(char* dst, size_t size, const char* src);

+/**
+ * Concatenate a path limiting the size knowing the length.
+ * Abort if too long.
+ */
+void pathcatl(char* dst, size_t dst_len, size_t size, const char* src);
+
 /**
 * Concatenate a path limiting the size.
 * Abort if too long.
--- a/cmdline/unix.c
+++ b/cmdline/unix.c
@ -474,7 +474,7 @@ static int devuuid_dev(uint64_t device, char* uuid, size_t uuid_size)
 #endif

 /**
- * Get the UUID using liblkid.
+ * Get the UUID using libblkid.
 * It uses a cache to work without root permission, resulting in UUID
 * not necessarily recent.
 * We could call blkid_probe_all() to refresh the UUID, but it would
--- a/config.h.in
+++ b/config.h.in
@ -33,6 +33,10 @@
 /* Define to 1 if you have the `clock_gettime' function. */
 #undef HAVE_CLOCK_GETTIME

+/* Define to 1 if you have the declaration of `statfs', and to 0 if you don't.
+   */
+#undef HAVE_DECL_STATFS
+
 /* Define to 1 if you have the <dirent.h> header file, and it defines `DIR'.
   */
 #undef HAVE_DIRENT_H
--- a/255
+++ b/255
@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.69 for snapraid 11.6.
+# Generated by GNU Autoconf 2.69 for snapraid 12.2.
 #
 #
 # Copyright (C) 1992-1996, 1998-2012 Free Software Foundation, Inc.
@ -577,8 +577,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='snapraid'
 PACKAGE_TARNAME='snapraid'
-PACKAGE_VERSION='11.6'
-PACKAGE_STRING='snapraid 11.6'
+PACKAGE_VERSION='12.2'
+PACKAGE_STRING='snapraid 12.2'
 PACKAGE_BUGREPORT=''
 PACKAGE_URL='http://www.snapraid.it'

@ -1304,7 +1304,7 @@ if test "$ac_init_help" = "long"; then
  # Omit some internal or obsolete options to make the list less imposing.
  # This message is too long to be a string in the A/UX 3.1 sh.
  cat <<_ACEOF
-\`configure' configures snapraid 11.6 to adapt to many kinds of systems.
+\`configure' configures snapraid 12.2 to adapt to many kinds of systems.

 Usage: $0 [OPTION]... [VAR=VALUE]...

@ -1374,7 +1374,7 @@ fi

 if test -n "$ac_init_help"; then
  case $ac_init_help in
-     short | recursive ) echo "Configuration of snapraid 11.6:";;
+     short | recursive ) echo "Configuration of snapraid 12.2:";;
   esac
  cat <<\_ACEOF

@ -1496,7 +1496,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
  cat <<\_ACEOF
-snapraid configure 11.6
+snapraid configure 12.2
 generated by GNU Autoconf 2.69

 Copyright (C) 2012 Free Software Foundation, Inc.
@ -2098,11 +2098,57 @@ $as_echo "$ac_res" >&6; }
  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno

 } # ac_fn_c_check_func
+
+# ac_fn_c_check_decl LINENO SYMBOL VAR INCLUDES
+# ---------------------------------------------
+# Tests whether SYMBOL is declared in INCLUDES, setting cache variable VAR
+# accordingly.
+ac_fn_c_check_decl ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  as_decl_name=`echo $2|sed 's/ *(.*//'`
+  as_decl_use=`echo $2|sed -e 's/(/((/' -e 's/)/) 0&/' -e 's/,/) 0& (/g'`
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $as_decl_name is declared" >&5
+$as_echo_n "checking whether $as_decl_name is declared... " >&6; }
+if eval \${$3+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+int
+main ()
+{
+#ifndef $as_decl_name
+#ifdef __cplusplus
+  (void) $as_decl_use;
+#else
+  (void) $as_decl_name;
+#endif
+#endif
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  eval "$3=yes"
+else
+  eval "$3=no"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+eval ac_res=\$$3
+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+
+} # ac_fn_c_check_decl
 cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.

-It was created by snapraid $as_me 11.6, which was
+It was created by snapraid $as_me 12.2, which was
 generated by GNU Autoconf 2.69.  Invocation command line was

  $ $0 $@
@ -2450,7 +2496,7 @@ ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $
 ac_compiler_gnu=$ac_cv_c_compiler_gnu


-am__api_version='1.15'
+am__api_version='1.16'

 ac_aux_dir=
 for ac_dir in "$srcdir" "$srcdir/.." "$srcdir/../.."; do
@ -2965,7 +3011,7 @@ fi

 # Define the identity of the package.
 PACKAGE='snapraid'
- VERSION='11.6'
+ VERSION='12.2'


 cat >>confdefs.h <<_ACEOF
@ -2995,8 +3041,8 @@ MAKEINFO=${MAKEINFO-"${am_missing_run}makeinfo"}

 # For better backward compatibility.  To be removed once Automake 1.9.x
 # dies out for good.  For more background, see:
-# <http://lists.gnu.org/archive/html/automake/2012-07/msg00001.html>
-# <http://lists.gnu.org/archive/html/automake/2012-07/msg00014.html>
+# <https://lists.gnu.org/archive/html/automake/2012-07/msg00001.html>
+# <https://lists.gnu.org/archive/html/automake/2012-07/msg00014.html>
 mkdir_p='$(MKDIR_P)'

 # We need awk for the "check" target (and possibly the TAP driver).  The
@ -3047,7 +3093,7 @@ END
 Aborting the configuration process, to ensure you take notice of the issue.

 You can download and install GNU coreutils to get an 'rm' implementation
-that behaves properly: <http://www.gnu.org/software/coreutils/>.
+that behaves properly: <https://www.gnu.org/software/coreutils/>.

 If you want to complete the configuration process using your problematic
 'rm' anyway, export the environment variable ACCEPT_INFERIOR_RM_PROGRAM
@ -5170,7 +5216,7 @@ fi

 done

-for ac_header in sys/file.h sys/ioctl.h sys/vfs.h sys/statfs.h sys/param.h sys/mount.h sys/sysmacros.h sys/mkdev.h
+for ac_header in sys/file.h sys/ioctl.h sys/sysmacros.h sys/mkdev.h
 do :
  as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
 ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"
@ -5636,54 +5682,6 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF


-fi
-
-ac_fn_c_check_member "$LINENO" "struct statfs" "f_type" "ac_cv_member_struct_statfs_f_type" "
-#if HAVE_SYS_PARAM_H
-#include <sys/param.h>
-#endif
-#if HAVE_SYS_MOUNT_H
-#include <sys/mount.h>
-#endif
-#if HAVE_SYS_VFS_H
-#include <sys/vfs.h>
-#endif
-#if HAVE_SYS_STATFS_H
-#include <sys/statfs.h>
-#endif
-
-"
-if test "x$ac_cv_member_struct_statfs_f_type" = xyes; then :
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_STRUCT_STATFS_F_TYPE 1
-_ACEOF
-
-
-fi
-
-ac_fn_c_check_member "$LINENO" "struct statfs" "f_fstypename" "ac_cv_member_struct_statfs_f_fstypename" "
-#if HAVE_SYS_PARAM_H
-#include <sys/param.h>
-#endif
-#if HAVE_SYS_MOUNT_H
-#include <sys/mount.h>
-#endif
-#if HAVE_SYS_VFS_H
-#include <sys/vfs.h>
-#endif
-#if HAVE_SYS_STATFS_H
-#include <sys/statfs.h>
-#endif
-
-"
-if test "x$ac_cv_member_struct_statfs_f_fstypename" = xyes; then :
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_STRUCT_STATFS_F_FSTYPENAME 1
-_ACEOF
-
-
 fi


@ -5759,7 +5757,7 @@ _ACEOF
 fi
 done

-for ac_func in fstatat flock statfs
+for ac_func in fstatat flock
 do :
  as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
 ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
@ -5944,6 +5942,119 @@ if test "$ac_res" != no; then :
 fi


+for ac_header in sys/vfs.h sys/statfs.h
+do :
+  as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
+ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"
+if eval test \"x\$"$as_ac_Header"\" = x"yes"; then :
+  cat >>confdefs.h <<_ACEOF
+#define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1
+_ACEOF
+
+fi
+
+done
+
+ac_fn_c_check_decl "$LINENO" "statfs" "ac_cv_have_decl_statfs" "
+#if HAVE_SYS_VFS_H
+#include <sys/vfs.h>
+#endif
+#if HAVE_SYS_STATFS_H
+#include <sys/statfs.h>
+#endif
+
+"
+if test "x$ac_cv_have_decl_statfs" = xyes; then :
+  ac_have_decl=1
+else
+  ac_have_decl=0
+fi
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DECL_STATFS $ac_have_decl
+_ACEOF
+if test $ac_have_decl = 1; then :
+
+else
+
+	for ac_header in sys/param.h sys/mount.h
+do :
+  as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
+ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"
+if eval test \"x\$"$as_ac_Header"\" = x"yes"; then :
+  cat >>confdefs.h <<_ACEOF
+#define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1
+_ACEOF
+
+fi
+
+done
+
+
+fi
+
+for ac_func in statfs
+do :
+  ac_fn_c_check_func "$LINENO" "statfs" "ac_cv_func_statfs"
+if test "x$ac_cv_func_statfs" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_STATFS 1
+_ACEOF
+
+fi
+done
+
+
+ac_fn_c_check_member "$LINENO" "struct statfs" "f_type" "ac_cv_member_struct_statfs_f_type" "
+#if HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+#if HAVE_SYS_MOUNT_H
+#include <sys/mount.h>
+#endif
+#if HAVE_SYS_VFS_H
+#include <sys/vfs.h>
+#endif
+#if HAVE_SYS_STATFS_H
+#include <sys/statfs.h>
+#endif
+
+"
+if test "x$ac_cv_member_struct_statfs_f_type" = xyes; then :
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_STRUCT_STATFS_F_TYPE 1
+_ACEOF
+
+
+fi
+
+
+ac_fn_c_check_member "$LINENO" "struct statfs" "f_fstypename" "ac_cv_member_struct_statfs_f_fstypename" "
+#if HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+#if HAVE_SYS_MOUNT_H
+#include <sys/mount.h>
+#endif
+#if HAVE_SYS_VFS_H
+#include <sys/vfs.h>
+#endif
+#if HAVE_SYS_STATFS_H
+#include <sys/statfs.h>
+#endif
+
+"
+if test "x$ac_cv_member_struct_statfs_f_fstypename" = xyes; then :
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_STRUCT_STATFS_F_FSTYPENAME 1
+_ACEOF
+
+
+fi
+
+

 # Check whether --with-blkid was given.
 if test "${with_blkid+set}" = set; then :
@ -6333,6 +6444,22 @@ fi
 rm -f conftest*


+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ${CC-cc} accepts -Wno-zero-length-bounds" >&5
+$as_echo_n "checking whether ${CC-cc} accepts -Wno-zero-length-bounds... " >&6; }
+echo 'void f(){}' > conftest.c
+if test -z "`${CC-cc} -c -Wno-zero-length-bounds conftest.c 2>&1`"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+  CFLAGS="$CFLAGS -Wno-zero-length-bounds"
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+
+fi
+rm -f conftest*
+
+
 # Check whether --enable-asm was given.
 if test "${enable_asm+set}" = set; then :
  enableval=$enable_asm;
@ -7339,7 +7466,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by snapraid $as_me 11.6, which was
+This file was extended by snapraid $as_me 12.2, which was
 generated by GNU Autoconf 2.69.  Invocation command line was

  CONFIG_FILES    = $CONFIG_FILES
@ -7402,7 +7529,7 @@ _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
-snapraid config.status 11.6
+snapraid config.status 12.2
 configured by $0, generated by GNU Autoconf 2.69,
  with options \\"\$ac_cs_config\\"

--- a/configure.ac
+++ b/configure.ac
@ -36,7 +36,7 @@ AC_HEADER_SYS_WAIT
 AC_CHECK_HEADERS([fcntl.h stddef.h stdint.h stdlib.h string.h limits.h])
 AC_CHECK_HEADERS([unistd.h getopt.h fnmatch.h io.h inttypes.h byteswap.h])
 AC_CHECK_HEADERS([pthread.h math.h])
-AC_CHECK_HEADERS([sys/file.h sys/ioctl.h sys/vfs.h sys/statfs.h sys/param.h sys/mount.h sys/sysmacros.h sys/mkdev.h])
+AC_CHECK_HEADERS([sys/file.h sys/ioctl.h sys/sysmacros.h sys/mkdev.h])
 AC_CHECK_HEADERS([linux/fiemap.h linux/fs.h mach/mach_time.h execinfo.h])

 dnl Checks for typedefs, structures, and compiler characteristics.
@ -65,6 +65,38 @@ AC_CHECK_MEMBERS([struct stat.st_nlink, struct stat.st_mtim.tv_nsec, struct stat
 #include <unistd.h>
 #endif
 ]])
+
+dnl Checks for library functions.
+AC_CHECK_FUNCS([memset strchr strerror strrchr mkdir gettimeofday strtoul])
+AC_CHECK_FUNCS([getopt getopt_long snprintf vsnprintf sigaction])
+AC_CHECK_FUNCS([ftruncate fallocate access])
+AC_CHECK_FUNCS([fsync posix_fadvise sync_file_range])
+AC_CHECK_FUNCS([getc_unlocked ferror_unlocked fnmatch])
+AC_CHECK_FUNCS([futimes futimens futimesat localtime_r lutimes utimensat])
+AC_CHECK_FUNCS([fstatat flock])
+AC_CHECK_FUNCS([mach_absolute_time])
+AC_CHECK_FUNCS([backtrace backtrace_symbols])
+AC_SEARCH_LIBS([clock_gettime], [rt])
+AC_CHECK_FUNCS([clock_gettime])
+AC_CHECK_CC_OPT([-pthread], CFLAGS="$CFLAGS -pthread", CFLAGS="$CFLAGS -D_REENTRANT")
+AC_CHECK_FUNCS([pthread_create])
+AC_SEARCH_LIBS([exp], [m])
+
+dnl Checks for statfs for linux avoiding to include sys/mount.h that is required only in darwin
+dnl In glibc since 7eae6a91e9b1670330c9f15730082c91c0b1d570, milestone 2.36, sys/mount.h defines fsconfig_command which conflicts with linux/mount.h
+AC_CHECK_HEADERS([sys/vfs.h sys/statfs.h])
+AC_CHECK_DECLS([statfs], [], [
+	AC_CHECK_HEADERS([sys/param.h sys/mount.h])
+	], [[
+#if HAVE_SYS_VFS_H
+#include <sys/vfs.h>
+#endif
+#if HAVE_SYS_STATFS_H
+#include <sys/statfs.h>
+#endif
+]])
+AC_CHECK_FUNCS([statfs])
+
 AC_CHECK_MEMBERS([struct statfs.f_type], [], [], [[
 #if HAVE_SYS_PARAM_H
 #include <sys/param.h>
@ -79,6 +111,7 @@ AC_CHECK_MEMBERS([struct statfs.f_type], [], [], [[
 #include <sys/statfs.h>
 #endif
 ]])
+
 AC_CHECK_MEMBERS([struct statfs.f_fstypename], [], [], [[
 #if HAVE_SYS_PARAM_H
 #include <sys/param.h>
@ -94,22 +127,6 @@ AC_CHECK_MEMBERS([struct statfs.f_fstypename], [], [], [[
 #endif
 ]])

-dnl Checks for library functions.
-AC_CHECK_FUNCS([memset strchr strerror strrchr mkdir gettimeofday strtoul])
-AC_CHECK_FUNCS([getopt getopt_long snprintf vsnprintf sigaction])
-AC_CHECK_FUNCS([ftruncate fallocate access])
-AC_CHECK_FUNCS([fsync posix_fadvise sync_file_range])
-AC_CHECK_FUNCS([getc_unlocked ferror_unlocked fnmatch])
-AC_CHECK_FUNCS([futimes futimens futimesat localtime_r lutimes utimensat])
-AC_CHECK_FUNCS([fstatat flock statfs])
-AC_CHECK_FUNCS([mach_absolute_time])
-AC_CHECK_FUNCS([backtrace backtrace_symbols])
-AC_SEARCH_LIBS([clock_gettime], [rt])
-AC_CHECK_FUNCS([clock_gettime])
-AC_CHECK_CC_OPT([-pthread], CFLAGS="$CFLAGS -pthread", CFLAGS="$CFLAGS -D_REENTRANT")
-AC_CHECK_FUNCS([pthread_create])
-AC_SEARCH_LIBS([exp], [m])
-
 dnl Checks for libblkid
 AC_ARG_WITH([blkid],
    AS_HELP_STRING([--without-blkid], [Ignore presence of blkid and disable it]))
@ -135,6 +152,9 @@ AC_CHECK_CC_OPT([-Wextra], CFLAGS="$CFLAGS -Wextra", [])
 AC_CHECK_CC_OPT([-Wuninitialized], CFLAGS="$CFLAGS -Wuninitialized", [])
 AC_CHECK_CC_OPT([-Wshadow], CFLAGS="$CFLAGS -Wshadow", [])

+dnl Disable warning about zero-length-bounds raised by gcc 10 on linux kernel header on the fm_extents field
+AC_CHECK_CC_OPT([-Wno-zero-length-bounds], CFLAGS="$CFLAGS -Wno-zero-length-bounds", [])
+
 dnl Checks for asm
 AC_ARG_ENABLE([asm],
 	AS_HELP_STRING([--disable-asm], [Disable inline assembly]))
@ -179,7 +199,7 @@ dnl Checks for AS supporting the SSE4.2 instructions.
 AC_MSG_CHECKING([for sse42])
 asmsse42=no
 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
-#if defined(__i386__) || defined(__x86_64__) 
+#if defined(__i386__) || defined(__x86_64__)
 	unsigned f(unsigned crc, unsigned char b)
 	{
 		asm volatile("crc32b %1, %0" : "+r" (crc) : "rm" (b));
--- a/debian/changelog
+++ b/debian/changelog
@ -0,0 +1,693 @@
+snapraid (11.6-0) UNRELEASED; urgency=medium
+
+  * Bump
+  * Bump
+
+ -- Mario Fetka <mario.fetka@gmail.com>  Fri, 11 Sep 2020 13:42:38 +0200
+
+snapraid (11.2-0tikhonov1) xenial; urgency=medium
+
+  [11.2 2017/12]
+  * Fixed recognition of NTFS hardlinks. They behave differently than
+    standard Unix hardlinks and this could result in SnapRAID reporting
+    internal inconsistency errors for detecting links to the same file
+    with different metadata attributes.
+  * More efficient 'pool' command that updates only the links
+    that need to be updated. This ensures that no change is
+    done, avoiding to trigger a directory rescan of other programs.
+  * In Linux use by default the advise "discard" mode instead of "flush".
+    This avoids to swap-out the other process memory, leaving the system
+    more responsive.
+  * Changed the fallocate() use to work better with Btrfs with parity disks.
+  * Changed the --test-io-stats screen to print the file name in process
+    for each disk.
+
+ -- Maxim Tikhonov <flaterichd@gmail.com>  Wed, 18 Jul 2018 19:44:46 +0400
+
+snapraid (11.1-0tikhonov1~trusty) trusty; urgency=medium
+
+  [11.1 2017/05]
+  * Fixed the check command to correctly ignore errors on unused parity.
+    This was broken in version 9.0.
+  * Allow increasing the number of parity splits of existing parity.
+  * Fixed quoting when printing in Linux. This fixes the UTF-8 screen
+    output. Windows version was not affected.
+  * Fixed recognition of 'hashsize' in the configuration file.
+    The previous incorrect 'hash_size' is still supported for backward
+    compatibility.
+  * Fixed building in platforms that don't provide major/minor definitions
+    in sys/types.h.
+  * When creating 'pool' symbolic links, set their time as the linked files.
+  * Added support for the Windows 10 symbolic link unprivileged creation,
+    using SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE.
+  * Windows binaries built with gcc 4.9.4 using the MXE cross compiler at
+    commit ae56efa2b23a793b0146508bfef33027cdb09fd2 with targets
+    i686-w64-mingw32 and x86_64-w64-mingw32 and optimization -O2.
+
+ -- Maxim Tikhonov <flaterichd@gmail.com>  Mon, 28 Aug 2017 12:41:29 +0400
+
+snapraid (11.0-0tikhonov1~trusty) trusty; urgency=medium
+
+  [11.0 2016/11]
+  * Added support for splitting the parity in multiple partitions. You
+    can now specify multiple files for a single parity. As soon a file
+    cannot grow anymore, the next one starts growing.
+    In the configuration file, just put more files in the same 'parity'
+    line, separated by , (comma).
+    Note that if this feature is used, the saved content file won't be
+    read by older SnapRAID versions.
+    In Windows, 256 MB are left free in each disk to avoid the warning
+    about full disks.
+  * Added a new 'hashsize' configuration option. It could be useful in
+    systems with low memory, to reduce the memory usage.
+    Note that if this feature is used, the saved content file won't be
+    read by older SnapRAID versions.
+  * In Linux added the missing support for Btrfs file-systems. Note that
+    to have full support you need also the 'libblkid' library, otherwise
+    you won't get the UUIDs.
+  * In screen messages don't print the disk directory in file path. You
+    can control the format with the test option:
+    --test-fmt file|disk|path.
+  * In Windows allows to use the escape char '^' to handle file patterns
+    containing real characters matching the globbing '*?[]' ones. In Unix
+    it was already possible to do the same escaping with '\'.
+  * Added a new -R, --force-realloc option to reallocate all the
+    parity information keeping the precomputed hash.
+    This is the previous -F, --force-full that instead now maintains the
+    same parity organization and just recomputes it.
+  * Added test options for selecting the file advise mode to use:
+    --test-io-advise-none for standard mode
+    --test-io-advise-sequential advise sequential access (Linux/Windows)
+    --test-io-advise-flush flush cache after every operation (Linux)
+    --test-io-advise-flush-window flush cache every 8 MB (Linux)
+    --test-io-advise-discard discard cache after every operation (Linux)
+    --test-io-advise-discard-window discard cache every 8 MB (Linux)
+    --test-io-advise-direct use direct/unbuffered mode (Linux/Windows)
+    The new default mode is 'flush' in Linux (before it was 'sequential'),
+    and 'sequential' in Windows (like before).
+  * For Seagate SMR (Shingled Magnetic Recording) ignore the SMART
+    attribute Command_Timeout 188 as not reliable.
+  * Fixed running in Windows platforms that miss the RtlGenRandom()
+    function.
+  * Added the --test-io-cache=1 option to disable the multi-thread IO
+    mode.
+
+ -- Maxim Tikhonov <flaterichd@gmail.com>  Thu, 01 Dec 2016 16:25:21 +0400
+
+snapraid (10.0-0tikhonov1~trusty) trusty; urgency=medium
+
+  [ 10.0 2016/02 ]
+  * Boosts the speed of the 'sync' and 'scrub' commands with a new
+    multi-thread implementation. It uses one thread for each disk,
+    dedicated exclusively to read-ahead data and parity and to
+    write-behind parity. This maximizes the data throughput keeping
+    disks always busy.
+    You can control the number of blocks to cache with the option
+    --test-io-cache=NUMBER, where the number is between 3 and 128.
+    The default is 8 MiB of blocks.
+    You can show run-time stats during the process with the
+    --test-io-stats option. You will see a graph with the number of
+    cached blocks, and a graph with the wait time percentage for all the
+    disks and computations.
+  * The -h, --pre-hash command, saves the content file only after having
+    verified all the hashes. This allows recovering of moved files in
+    case a silent error is found during the hash verification check.
+  * Allows to use the -d, --filter-disk option in the 'up' and 'down'
+    commands.
+  * Allows to run the 'smart' command without a configuration file.
+    In such case it operates on all the disks of the machine.
+  * In the configuration file 'data' is now a synonymous of 'disk'.
+  * Adds the 'touch' command intended to arbitrarily set all the zero
+    sub-second timestamps. This improves the SnapRAID capabilities to
+    identify files. The 'status' command recommends to run 'touch' if
+    required.
+  * Restores the functionality of the -D, --force-device option when used
+    to workaround the use of the same disk for two logical data drives
+    when running the 'fix' command.
+  * Uses a correct shell quoting in the example commands that involve
+    files.
+  * The minimum Windows version supported is now Windows Vista. This is
+    required to use the native Windows thread support for the new
+    multi-thread implementation. If you need to run on Windows XP, you
+    have to stick on SnapRAID 9.x.
+
+ -- Maxim Tikhonov <flaterichd@gmail.com>  Sat, 05 Mar 2016 17:44:53 +0400
+
+snapraid (9.3-0tikhonov1~trusty) trusty; urgency=medium
+
+  [ 9.3 2016/01 ]
+  * Fixes an invalid assumption in the copy detection mechanism that
+    could result in an internal inconsistency, and with the impossibility
+    to run the 'sync' and 'diff' commands.
+    This was triggered by a very specific pattern of identical files.
+    At least three of them, with one already in the parity, and at a
+    higher disk number than the others that should be instead new ones.
+    This had no bad effect, if not preventing the 'sync' command to run.
+    A workaround was to just run 'sync' one time with the -N,
+    --force-nocopy option to disable the copy detection.
+  * Restored the -O2 optimization option for Windows binaries, as -Og has
+    a too big performance penality.
+
+  [ 9.2 2016/01 ]
+  * Fixes support for symlinks pointing to an empty target. Before they
+    were only partially supported, and their presence could result in a
+    content file not readable.
+    This also disables multi-thread content write, as this was the issue
+    we tried to detect with this feature, and it doesn't provide a
+    performance advantage. Content verification is instead still multi
+    thread.
+  * Autorename disks using the matching UUID. To rename a disk you can
+    now change directly the name in the configuration file, and run a
+    'sync' command.
+  * Improves the physical offset ordering for the Btrfs file-system,
+    correctly detecting files that have not a physical offset, for
+    whatever reason.
+  * Adds UUID support to Btrfs file-systems. It's present only if the
+    'libblkid' development library is available on the system.
+    Usually this requires to install the libblkid-dev or libblkid-devel
+    package.
+  * Added a new --no-warnings option to disable some repetitive warnings
+    that could be annoying to power users.
+  * Improves the error reporting, printing a complete stack trace, that
+    can be used to track down bugs more easily.
+    For this reason the Windows binaries are now built with optimization
+    option -Og, instead than -O2.
+
+ -- Maxim Tikhonov <flaterichd@gmail.com>  Tue, 02 Feb 2016 12:59:13 +0400
+
+snapraid (9.1-0tikhonov1~trusty) trusty; urgency=medium
+
+  [ 9.1 2015/11 ]
+  * Fixes a bug when reading a content file with a deleted entry bigger
+    than 4 GB. This was a regression introduced in version 9.0 that
+    could result in the impossibility to read a valid content file,
+    after a deletion of a file bigger than 4 GB in the array.
+    If this happened to you, just upgrading to 9.1 fixes the issue, and
+    it allows you to continue to work.
+    Note that this bug only prevented to run 9.0, but your data was still
+    protected and could have been recovered using the versions 8.1 or 9.1.
+  * In Windows disables the file zero check requiring the --force-zero
+    option. This check is intended for possible case using ext3/4 in Linux,
+    and there is no evidence that in Windows it's possible at all.
+  * Windows binaries built with gcc 4.9.3 using the MXE cross compiler at
+    commit 62bcdbee56e87c81f1faa105b8777a5879d4e2e with targets
+    i686-w64-mingw32 and x86_64-w64-mingw32 and optimization -O2.
+
+  [ 9.0 2015/11 ]
+  * Fixes an invalid assumption that could happen when using the
+    -e, --filter-error option with "fix" or "check".
+    This was triggered by a very specific pattern of fragmented files
+    and bad blocks combination, not so easy to reproduce.
+    This had no bad effect, if not preventing the command to run.
+  * Drastically reduces the memory usage. For each block, it now
+    uses 17 bytes of memory, instead of the previous 28 bytes
+    (for 32 bit) or 36 bytes (for 64 bit).
+    This could result is a memory saving of up the 50%.
+  * The -p, --plan option (old --percentage) can be used to
+    define a scrub plan: "new", "bad" and "full".
+    The "new" plan scrubs all the new synced  blocks not yet scrubbed.
+    This allows to verify as early as possible that the written
+    parity during sync is really correct. You can use the "status"
+    command to show the amount blocks not yet scrubbed.
+    The "bad" plan scrubs only bad blocks.
+    The "full" plan scrubs all blocks.
+  * The graph in the "status" command now show scrubbed blocks
+    with '*', and synced, but not yet scrubbed, blocks with 'o'.
+    Note that when upgrading from a previous version, all blocks
+    are assumed scrubbed the first time.
+  * Content files are now written asyncronously from different
+    threads to avoid the unfortunate condition that a memory
+    error affects all of them in the same way.
+    After writing, they are read again to verify their CRC.
+    This is done to ensure thay they are really OK, even in the
+    case of the worst possible silent errors.
+  * Extends the -D, --force-device option to ignore more
+    erroneous conditions in the 'fix' command, like unaccessible
+    disks, or disks sharing the same physical device.
+  * Extends the -d, --filter-disk option to allow to filter also
+    by parity disk.
+  * Extends the -h, --pre-hash option to also verify moved and
+    copied files into the array before running a 'sync'.
+  * Updates 'best' RAID functions for recent Atom CPUs.
+  * Validates filters specifications rejecting relative paths.
+
+ -- Maxim Tikhonov <flaterichd@gmail.com>  Tue, 01 Dec 2015 23:50:52 +0400
+
+snapraid (8.1-0tikhonov1~trusty) trusty; urgency=medium
+
+  [ 8.1 2015/05 ]
+  * Fix build issues in generic Unix platforms, including Mac OS X.
+  * The "diff" command returns with error code 2 if a "sync" is
+    required, to differentiate with the generic error code 1.
+  * Reduced the effect of SMART attribute 193 on the failure
+    probability to avoid some false positive reports.
+
+ -- Maxim Tikhonov <flaterichd@gmail.com>  Sun, 17 May 2015 23:29:11 +0400
+
+snapraid (8.0-0tikhonov1~trusty) trusty; urgency=medium
+
+  [ 8.0 2015/04 ]
+  * Allows "sync" and "scrub" to continue after the first bunch of disk
+    errors. Blocks with errors are marked as bad, and you can fix them
+    with the "fix -e" command.
+    The fix is expected to force the disk firmware to reallocate the
+    bad sector, likely fixing the problem.
+    You can control the number of allowed errors with the new
+    -L, --error-limit option. The default is 100.
+  * The -e, --filter-error option doesn't write anymore fixes to
+    unsynced files. This helps in case you are running it on a not
+    synced array, removing the risk to revert some files to an old state.
+  * The -e, --filter-error option is now optimal and reads only the
+    minimal amount of data necessary to fix the errors.
+  * The "diff" command returns with an error code if a "sync" is
+    required.
+  * Adds new "smart" command to print a SMART report of the array.
+  * Adds new "up" and "down" commands to spin up and down the disks of
+    the array.
+  * Adds new "devices" command to print the devices associations in
+    the array.
+  * Changes the log handling. If no log file is specified, all the
+    warnings and not fatal errors messages goes to stderr. If a log file
+    is specified, only fatal error messages are printed on the screen.
+    You can control the amount of informative messages on stdout with
+    the -q, --quiet and -v, --verbose options, that can be specified
+    multiple times to be more quiet or verbose.
+  * In the "status" command the "Wasted" column now shows a negative
+    number for the amount of space that you can still waste without
+    filling up the parity.
+  * In the "status" and others commands we now use GB instead of GiB,
+    when referring to disk space.
+  * Renames the -s and -t options to -S and -B as they are intended to
+    be manual only operations.
+  * Windows binary built with gcc 4.8.1 using the MXE cross compiler 2.23,
+    with targets i686-w64-mingw32 and x86_64-w64-mingw32. Before the x86
+    target was i686-pc-mingw32.
+
+ -- Maxim Tikhonov <flaterichd@gmail.com>  Thu, 30 Apr 2015 23:01:55 +0400
+
+snapraid (7.1-0tikhonov1~precise) precise; urgency=medium
+
+  [ 7.1 2015/01 ]
+  * In 'scrub' and 'sync' detects and reports Input/Output errors
+    separately from generic file system errors.
+  * In 'diff' doesn't print the "add" entry if a "copy" one is already
+    printed.
+  * Fixes build with old compilers in the x64 platforms [Leigh Phillips].
+  * Fixes out-of-dir builds [Christoph Junghans].
+
+ -- Maxim Tikhonov <flaterichd@gmail.com>  Wed, 11 Mar 2015 20:36:58 +0400
+
+snapraid (7.0-0tikhonov2~precise) precise; urgency=medium
+
+  [ 7.0 2014/11 ]
+  * In 'check' and 'fix' the array is scanned to find any moved files
+    that could be used to recover missing data. Files are identified by
+    timestamp, and then they are recognized also if moved to a different
+    disk. Note that even if there are false positive they are identified
+    checking the hash, so they have not effect, besides making the
+    process a little slower. To disable this new behaviour you can use
+    the -N, --force-nocopy option.
+  * The -i, --import command now identifies files by timestamp making it
+    very fast in importing directories.
+  * More detailed 'status' report with single disk stats and free space
+    available.
+  * A lot faster directory listing for Windows.
+  * Adds AVX2 support to improve parity generation speed.
+  * Prints the time spent waiting for each disk also in 'scrub'.
+  * The CPU usage, speed and ETA estimations are now based on the last 100
+    seconds rather than from the start.
+  * Keeps track of the UUID of the parity disks to check them before
+    operating.
+  * Windows binary built with gcc 4.8.1 using the MXE cross compiler 2.23.
+
+ -- Maxim Tikhonov <flaterichd@gmail.com>  Thu, 27 Nov 2014 00:36:59 +0400
+
+snapraid (6.2-0tikhonov1~precise) precise; urgency=low
+
+  [ 6.2 2014/5 ]
+  * Fixed the regression test when run as root.
+  * Added a new heuristic to detect file copies. Now a file is assumed
+    to be a copy if name, size and nanosecond timestamp are matching,
+    but if the nanosecond part of the timestamp is 0, it requires
+    the full path matching and not only the name.
+  * Added the -N, --force-nocopy option to disable completely
+    the copy detection. SnapRAID also suggests to use this option
+    in the error message of a data mismatch if likely caused by the
+    copy detection.
+
+ -- Maxim Tikhonov <flaterichd@gmail.com>  Wed, 16 Jul 2014 01:01:09 +0400
+
+snapraid (6.1-0tikhonov1~precise) precise; urgency=high
+
+  [ 6.1 2014/4 ]
+  * Fix build and regression test in Mac OS X.
+
+ -- Maxim Tikhonov <flaterichd@gmail.com>  Tue, 22 Apr 2014 00:22:07 +0400
+
+snapraid (6.0-0tikhonov1~precise) precise; urgency=low
+
+  [ 6.0 2014/3 ]
+  * In "sync", even if a silent error is found, continue to update
+    the parity if it's possible to correct the error.
+    Note that the block will be marked bad, and the data
+    will be fixed only at the next "fix -e" call.
+    But any new data added will be protected if you are using
+    enough parity to fix both the silent error and at least
+    another potential error.
+  * Detect copied files from one disk to another and reuse the already
+    computed hash information to validate them in "sync".
+    Files are assumed copied if they matches the name, size and timestamp.
+  * For "sync", added a new -h, --pre-hash option to run a preliminary
+    hashing step for all the new files to ensure to detect silent errors
+    caused by the heavy machine usage of the parity computation.
+  * In "fix", if a previous fixing attempt was made resulting in a
+    .unrecoverable file, uses this file as starting point for the
+    new attempt.
+  * In the log file name allows the use of the '>>', %D, %T modifiers
+    to select append mode, and to insert the date and time in the name.
+  * The options  -p, --percentage and -o, --older-than now keep their
+    default value even if the other one is specified.
+  * Moved the .lock file in the same dir of the first specified content
+    file. This avoid to spin-up the parity disks in all commands.
+  * The "diff", "list", "dup", "status" and "pool" commands don't access
+    anymore the parity disks that can now stay powered down.
+  * The default configuration file in Windows is now searched in the same
+    directory where the snapraid.exe file resides.
+  * New source code organization. The RAID engine is now
+    an external component usable also in other projects.
+
+ -- Maxim Tikhonov <flaterichd@gmail.com>  Fri, 11 Apr 2014 02:43:52 +0400
+
+snapraid (5.3-0tikhonov1~precise) precise; urgency=low
+
+  [ 5.3 2014/3 ]
+  * Don't warn about UUID changed if it's for an empty disk.
+  * Fixed the number of blocks that scrub has to process when
+    selecting a high percentage of the array.
+  * Removed duplicate recovery attempts in synced state.
+
+  [ 5.2 2013/12 ]
+  * If a disk changes UUID, automatically disable the inode
+    recognition, because this is likely a new filesystem with
+    all the inodes reassigned, and we don't want to risk a false
+    positive when searching for inode/timestamp/size.
+  * Allow to run a fix command with disks that doesn't need to be
+    fixed mounted as read-only.
+  * After a failed sync, always reallocates new files with a not
+    yet computed parity to ensure to minimize the parity usage,
+    if some other file is deleted in the meantime.
+  * Doesn't count empty dirs as files in the diff counters.
+  * Added a new "share" configuration option to allow to share
+    in the network the pool directory also in Windows.
+  * Fixed build problems in OpenBSD due the old assembler.
+  * Fixed build problems in platforms different than x86.
+
+  [ 5.1 2013/12 ]
+  * Fixed a potential crash if a file is deleted during a "sync/scrub".
+    This is a problem introduced in version 5.0 due new logging.
+    If happened to you to have a crash in sync, you don't need to
+    take any special action, just run "sync" again.
+  * Restored the functionality of -C, --gen-conf command.
+  * Prints the files with duplicate physical offset if the
+    -v, --verbose option is specified.
+
+ -- Maxim Tikhonov <flaterichd@gmail.com>  Tue, 11 Mar 2014 18:56:46 +0400
+
+snapraid (5.0-0tikhonov1~precise) precise; urgency=low
+
+  * New upstream release.
+
+  [ Upstream changelog 4.4 ]
+  * Added support for up to six levels of parity.
+  * Added a specific and faster triple parity format for CPUs that
+    don't support SSSE3 instructions like ARM and AMD Phenom, Athlon
+    and Opteron.
+  * Faster RAID5 and RAID6 implementation for ARM 64 bit CPUs.
+  * If a silent error is found during a "sync" command, directly marks
+    the block as bad like in "scrub", without stopping the the "sync"
+    process.
+  * Sort files by inode when listing the directory. This improves
+    the scanning performance.
+  * For files with changes only in some blocks, updates the parity
+    only for blocks that really are changed.
+    This improves the performance in sync for modified files.
+  * Added a new "list" command to see the stored list of files.
+  * Removed the detailed list of errors from the screen output.
+    To get it you must explicitely use the -l, --log option.
+    It's now too detailed for the screen, because it contains a lot
+    of info.
+  * Changed the output format of some commands to make it similar
+    at the new "list" one.
+  * Reduced memory usage removing some unnecessary allocations.
+  * Added a memory test on the memory buffers used in sync/scrub/check/fix
+    before using them.
+
+ -- Maxim Tikhonov <flaterichd@gmail.com>  Mon, 25 Nov 2013 15:58:37 +0400
+
+snapraid (4.4-0tikhonov1~precise) precise; urgency=low
+
+  * New upstream release.
+
+  [ Upstream changelog 4.4 ]
+  * Relaxed the check about small parity files, to allow to recover after a 
+    failed sync before resizing the parity files.
+
+  [ Upstream changelog 4.3 ]
+  * Fixed the scrub command with the -p0 option. Now it really scrubs only the 
+    blocks marked as bad and not the full array.
+
+  [ Upstream changelog 4.2 ]
+  * Fixed the wrong warning about physical offsets not supported caused by files 
+    not having a real offset because too small. For example, in NTFS it's possible 
+    to store such files in the MFT. It's just a cosmetic change, and not a 
+    functional one.
+  * Remove unexpected 'Restore' entries in the diff output when dealing with 
+    filesystem without persistent inodes like NTFS in Linux.
+  * Added support for filenames containing newlines. This happens in Mac OS X.
+
+  [ Upstream changelog 4.1 ]
+  * If the underline filesystem doesn't support the FIEMAP command, automatically 
+    fallback to use FIBMAP for sorting files.
+  * Fixed the import of content files from previous version of SnapRAID that are 
+    the result of an incomplete sync.
+  * Added a new -C, --gen-conf option to generate a dummy configuration file from 
+    the info in the content file. Just in case that you lose everything, except 
+    the content file.
+  * At the end of sync/scrub/check/fix prints "Everything OK" if no error was found. 
+    This should make clear that everything is really OK.
+
+  [ Upstream changelog 4.0 ]
+  * New 'scrub' command to periodically check the oldest blocks for silent 
+    errors without the need to scan the whole array. 
+  * New 'status' command to check the fragmentation, the last check time 
+    distribution, and the silent error status of the array.
+  * Added the new Spooky hash. It's faster in 64 bit architectures. To 
+    convert you can use the new 'rehash' command.
+  * Changed to a binary content file to improve speed and reduce size.
+  * Removed the --find-by-name, -N option. Now it always searches
+    by name if a file is not found searching by inode, automatically
+    reassigning inodes in restored files without needing to sync
+    again the file. This happens only if the file has the same path, size 
+    and timestamp at nanosecond precision.
+  * Added a hash seed to make harder intentional collision attacks.
+  * When inserting files for the first time, sort them by their physical
+    address to improve read performance.
+  * Optimized the cache use for the all the RAID computations.
+    This improves a lot the RAID performance.
+  * Better selection of the RAID6 implementation for different CPUs.
+  * Added RAID5/RAID6 mmx and sse2 implementations with unrolling by 4.
+    They are a little faster than the previous unroll by 2.
+  * Added a lock file to avoid multiple running instances on the same array.
+    The file is named as parity file adding the .lock extension.
+    There is also the undocumented --test-skip-lock to avoid to check it.
+  * Automatically ignores, with warning, mount points inside the array
+    directory tree.
+  * Changes the 'dup' output format to include the size of each duplicate file.
+
+ -- Maxim Tikhonov <flaterichd@gmail.com>  Fri, 01 Nov 2013 00:04:46 +0400
+
+snapraid (3.2-0tikhonov1~precise) precise; urgency=low
+
+  * New upstream release.
+
+  [ Upstream changelog 3.2 ]
+  * Fix a directory creation problem in Windows when the "disk" option points to
+    the root directory of a drive. Now SnapRAID won't complain about the
+    inability to create such directory.
+    If you encouter this problem when trying to recover your data, just upgrade
+    to this version, and you'll be able to complete the recovering process.
+    No need to upgrade for platforms different than Windows.
+
+  [ Upstream changelog 3.1 ]
+  * Direct use of Windows API for disk access to improve error reporting.
+  * If the 'fix' process is aborted, it removes all the new files partially
+    recovered, to allow to reuse again the '-m, --filter-missing' flag.
+  * In Windows don't exclude anymore system files. Only system directories are
+    excluded.
+  * In Windows applies filters in case insensitive way.
+  * The Windows binaries are now built with gcc 4.7.2.
+  * Reduced memory occupation for hardlinks and directories.
+  * In 'dup' don't list file with 0 size.
+
+ -- Maxim Tikhonov <flaterichd@gmail.com>  Fri, 09 Aug 2013 17:43:06 +0400
+
+snapraid (3.0-0tikhonov1~precise) precise; urgency=low
+
+  * New upstream release.
+
+  [ Upstream changelog ]
+  * Added pooling support with the new 'pool' command. It creates a virtual
+    view of the array using symbolic links pointing to the original files.
+  * Added a new -m, --filter-missing option that allow to undelete files,
+    without checking/fixing the others.
+  * Added a new -i, --import option to automatically import deleted files
+    when fixing.
+  * Added a new -l, --log option to save to disk the detailed log.
+  * Added support also for hardlinks and empty directories.
+  * Added support to save symlinks to files in Windows. Note that only the
+    symlink is saved and not the linked file.
+    Symlinks to dirs and junctions are still not supported in Windows.
+  * Files without read permission generate an error instead of a warning.
+    You now must explicitely exclude them in the configuration file with
+    exclusion rules.
+  * In 'check' and 'fix', if verbose is enabled, prints the result for each
+    processed file.
+  * Added an UUID check to detect when a disk is replaced, and to prevent
+    unwanted disk swaps.
+
+ -- Maxim Tikhonov <flaterichd@gmail.com>  Wed, 03 Apr 2013 13:01:53 +0400
+
+snapraid (2.1-0tikhonov1~precise) precise; urgency=low
+
+  * New upstream release.
+
+  [ Upstream changelog ]
+  * Checks for wrong empty fields in the configuration file.
+  * Filter rules for files are not anymore applied to directories.
+
+ -- Maxim Tikhonov <flaterichd@gmail.com>  Mon, 28 Jan 2013 02:10:28 +0400
+
+snapraid (2.0-0tikhonov1~precise) precise; urgency=low
+
+  * New upstream release.
+
+  [ Upstream changelog ]
+  * Added a new -a option to make the 'check' command to only check file hashes
+    without checking the parity data.
+  * Added a new -d option to filter by disk name.
+  * The file modification time is now saved using nanosecond precision.
+    This allows to restore the exact modification time in 'fix'.
+    The new 'content' files written with this version are not backward
+    compatible, but it's still possible to read the old 'content' format.
+  * Fixed hard-links automatic exclusion. All the hardlinks after the first one
+    are now correctly ignored.
+  * If it isn't possible to grow a parity file, prints the list of files
+    outside the maximum size allocated.
+  * Autosave isn't triggered if we are near the end of the 'sync' process.
+  * Before starting a 'sync', we wait for two seconds, to workaround the FAT
+    limitation of having two seconds modification time precision.
+    This a safe measure to be 100% sure to always detect file changes.
+  * Always fill the memory after allocating it to avoid the OOM (Out Of Memory)
+    killer in Linux.
+  * Fixed compilation in Solaris/OpenIndiana for lacking both futimes()
+    and futimens().
+  * Now 'sync' ensures that the parity files are not too small to contain the
+    just loaded data.
+  * Removed the '-H,--filter-nohidden' option. It doesn't make sense to
+    have it as command line option.
+    You must use the 'nohidden' option in the configuration file.
+  * When opening files in read-only mode, also specify the noatime flag,
+    to avoid to update the file access time.
+  * Exclude rules for files are now also applied to directories.
+    This allows to excludes some file/directory without the need to call
+    the stat() function on them.
+  * The -N, --find-by-name option also ignores the nanosecond part of
+    timestamps to work with copy programs not supporting nanoseconds.
+  * Fixed deduplicated files handling in Windows Server 2012.
+  * Removed MD5 support.
+
+ -- Maxim Tikhonov <flaterichd@gmail.com>  Thu, 06 Dec 2012 00:38:20 +0400
+
+snapraid (1.13-0tikhonov1~precise) precise; urgency=low
+
+  * New upstream release.
+
+  [ Upstream changelog ]
+  * Fixed a Segmentation Fault when checking/fixing if there are three or 
+    more errors in a specific block.
+
+ -- Maxim Tikhonov <flaterichd@gmail.com>  Mon, 05 Nov 2012 16:31:22 +0400
+
+snapraid (1.12-0tikhonov1~precise) precise; urgency=low
+
+  * New upstream release 1.12.
+
+  [ Upstream changelog ]
+  * Fixed file renaming in Windows during a 'fix' command. This is only a 
+    Windows issue, no reason to upgrade for other platforms.
+
+ -- Maxim Tikhonov <flaterichd@gmail.com>  Thu, 20 Sep 2012 13:13:40 +0400
+
+snapraid (1.11-0tikhonov1~precise) precise; urgency=high
+
+  * New upstream release 1.11.
+
+  [ Upstream changelog ]
+  * Fixed again directories inclusion. Exclusion rules for directories were ignored.
+
+ -- Maxim Tikhonov <flaterichd@gmail.com>  Mon, 09 Jul 2012 19:06:01 +0400
+
+snapraid (1.10-0tikhonov1~precise) precise; urgency=low
+
+  * New upstream release 1.10.
+
+  [ Upstream changelog ]
+  * Fixed directory inclusion, in case the last rule is an "include" one.
+  * Fixed very long paths in Windows. We now always use the special '\\?' prefix to remove the 260 chars limitation.
+  * If a file is excluded, it prints explicitely which attribute caused the exclusion.
+  * Automatically excludes also the temporary copy of content file, the one with the ".tmp" extension.
+  * Avoid the Windows system to go in automatic sleep mode when running.
+
+ -- Maxim Tikhonov <flaterichd@gmail.com>  Sun, 01 Jul 2012 21:43:16 +0400
+
+snapraid (1.9-0tikhonov1~precise) precise; urgency=low
+
+  * New upstream release 1.9.
+
+  [ Upstream changelog ]
+  * Implemented a more sophisticated recovering in case a harddisk failure happens during a 'sync' 
+    command. When using RAID6 it improves the chances of recovering data after an aborted 'sync'.
+  * Fixed the count of new files.
+  * Added a new 'autosave' configuration option to save the intermediate 'sync' state.
+  * Supported filesystems with read requests returning less data than requested.
+  * In Windows ensures that the disk serial number is not zero.
+
+ -- Maxim Tikhonov <flaterichd@gmail.com>  Tue, 10 Apr 2012 17:31:51 +0400
+
+snapraid (1.8-0tikhonov1~oneiric) oneiric; urgency=low
+
+  * New upstream release 1.8.
+
+  Upstream changelog:
+  * Added a new "dup" command to find all the duplicate files.
+  * Added a new option "--filter-nohidden" to exclude hidden files.
+  * Faster and parallel writing of content files.
+  * The example configuration files now put the content files in the data
+    disks instead than in the parity disks.
+  * Added a checksum at the content file to ensure its integrity.
+  * Using fallocate() instead posix_fallocate() to avoid the very slow 
+    posix_fallocate() fallback of writing the whole file.
+
+ -- Maxim Tikhonov <flaterichd@gmail.com>  Sat, 17 Mar 2012 19:15:07 +0400
+
+snapraid (1.7-0tikhonov2~oneiric) oneiric; urgency=low
+
+  * Fixed example snapraid.conf.
+
+ -- Maxim Tikhonov <flaterichd@gmail.com>  Sat, 24 Dec 2011 01:28:39 +0400
+
+snapraid (1.7-0tikhonov1~oneiric) oneiric; urgency=low
+
+  * Initial release.
+
+ -- Maxim Tikhonov <flaterichd@gmail.com>  Thu, 22 Dec 2011 19:46:17 +0400
--- a/debian/compat
+++ b/debian/compat
@ -0,0 +1 @@
+7
--- a/debian/control
+++ b/debian/control
@ -0,0 +1,28 @@
+Source: snapraid
+Section: utils
+Priority: extra
+Maintainer: Maxim Tikhonov <flaterichd@gmail.com>
+Build-Depends: debhelper (>= 7.0.0), autotools-dev
+Standards-Version: 3.9.2
+Homepage: http://snapraid.sourceforge.net/
+
+Package: snapraid
+Architecture: any
+Depends:
+    ${shlibs:Depends}, 
+    ${misc:Depends}
+Description: SnapRAID is a backup program for disk arrays.
+ SnapRAID is a backup program for disk arrays.
+ .
+ SnapRAID stores redundancy information in the disk array, and it allows recovering from up to two disk failures.
+ .
+ SnapRAID is mainly targeted for a home media center, where you have a lot of big files that rarely change.
+ .
+ Beside the ability to recover from disk failures, the other features of SnapRAID are:
+ - You can start using SnapRAID with already filled disks.
+ - The disks of the array can have different sizes.
+ - You can add more disks at any time.
+ - If you accidentally delete some files in a disk, you can recover them.
+ - If more than two disks fail, you lose the data only on the failed disks. All the data in the other disks is safe.
+ - It doesn't lock-in your data. You can stop using SnapRAID at any time without the need to reformat or move data.
+ - All your data is hashed to ensure data integrity and avoid silent corruption.
--- a/debian/copyright
+++ b/debian/copyright
@ -0,0 +1,40 @@
+Format: http://dep.debian.net/deps/dep5
+Name: snapraid
+Upstream-Name: snapraid
+Maintainer: Maxim Tikhonov <flaterichd@gmail.com>
+Source: http://sourceforge.net/projects/snapraid/files/
+
+Files: *
+Copyright: 2011 Andrea Mazzoleni <amadvance@users.sourceforge.net>
+License: GPL-3
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+ .
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+ .
+ On Debian systems, the complete text of the GNU General
+ Public License can be found in `/usr/share/common-licenses/GPL-3'.
+
+Files: debian/*
+Copyright: 2011 Maxim Tikhonov <flaterichd@gmail.com>
+License: GPL-2+
+ This package is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+ .
+ This package is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+ .
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>
+ .
+ On Debian systems, the complete text of the GNU General
+ Public License version 2 can be found in "/usr/share/common-licenses/GPL-2".
--- a/debian/docs
+++ b/debian/docs
@ -0,0 +1,9 @@
+AUTHORS
+CHECK
+COPYING
+HISTORY
+INSTALL
+README
+TODO
+snapraid.conf.example
+snapraid.txt
--- a/debian/install
+++ b/debian/install
@ -0,0 +1,2 @@
+debian/snapraid.conf    etc
+snapraid                usr/bin
--- a/debian/manpage.1
+++ b/debian/manpage.1
@ -0,0 +1 @@
+../snapraid.1
--- a/debian/rules
+++ b/debian/rules
@ -0,0 +1,21 @@
+#!/usr/bin/make -f
+# -*- makefile -*-
+# Sample debian/rules that uses debhelper.
+#
+# This file was originally written by Joey Hess and Craig Small.
+# As a special exception, when this file is copied by dh-make into a
+# dh-make output file, you may use that output file without restriction.
+# This special exception was added by Craig Small in version 0.37 of dh-make.
+#
+# Modified to make a template file for a multi-binary package with separated
+# build-arch and build-indep targets  by Bill Allombert 2001
+
+# Uncomment this to turn on verbose mode.
+#export DH_VERBOSE=1
+
+# This has to be exported to make some magic below work.
+export DH_OPTIONS
+
+
+%:
+	dh $@ 
--- a/debian/snapraid.conf
+++ b/debian/snapraid.conf
@ -0,0 +1,86 @@
+# Example configuration for snapraid
+
+# Defines the file to use as parity storage
+# It must NOT be in a data disk
+# Format: "parity FILE_PATH"
+parity /mnt/diskp/snapraid.parity
+
+# Defines the files to use as additional parity storage.
+# If specified, they enable the multiple failures protection
+# from two to six level of parity.
+# To enable, uncomment one parity file for each level of extra
+# protection required. Start from 2-parity, and follow in order.
+# It must NOT be in a data disk
+# Format: "X-parity FILE_PATH"
+#2-parity /mnt/diskq/snapraid.2-parity
+#3-parity /mnt/diskr/snapraid.3-parity
+#4-parity /mnt/disks/snapraid.4-parity
+#5-parity /mnt/diskt/snapraid.5-parity
+#6-parity /mnt/disku/snapraid.6-parity
+
+# Defines the files to use as content list
+# You can use multiple specification to store more copies
+# You must have least one copy for each parity file plus one. Some more don't hurt
+# They can be in the disks used for data, parity or boot,
+# but each file must be in a different disk
+# Format: "content FILE_PATH"
+content /var/snapraid.content
+content /mnt/disk1/snapraid.content
+content /mnt/disk2/snapraid.content
+
+# Defines the data disks to use
+# The name and mount point association is relevant for parity, do not change it
+# WARNING: Adding here your /home, /var or /tmp disks is NOT a good idea!
+# SnapRAID is better suited for files that rarely changes!
+# Format: "disk DISK_NAME DISK_MOUNT_POINT"
+data d1 /mnt/disk1/
+data d2 /mnt/disk2/
+data d3 /mnt/disk3/
+
+# Excludes hidden files and directories (uncomment to enable).
+#nohidden
+
+# Defines files and directories to exclude
+# Remember that all the paths are relative at the mount points
+# Format: "exclude FILE"
+# Format: "exclude DIR/"
+# Format: "exclude /PATH/FILE"
+# Format: "exclude /PATH/DIR/"
+exclude *.unrecoverable
+exclude /tmp/
+exclude /lost+found/
+
+# Defines the block size in kibi bytes (1024 bytes) (uncomment to enable).
+# Default value is 256 -> 256 kibi bytes -> 262144 bytes
+# Format: "blocksize SIZE_IN_KiB"
+#blocksize 256
+
+# Automatically save the state when syncing after the specified amount
+# of GB processed (uncomment to enable).
+# This option is useful to avoid to restart from scratch long 'sync'
+# commands interrupted by a machine crash.
+# It also improves the recovering if a disk break during a 'sync'.
+# Default value is 0, meaning disabled.
+# Format: "autosave SIZE_IN_GB"
+#autosave 500
+
+# Defines the pooling directory where the virtual view of the disk
+# array is created using the "pool" command (uncomment to enable).
+# The files are not really copied here, but just linked using
+# symbolic links.
+# This directory must be outside the array.
+# Format: "pool DIR"
+#pool /pool
+
+# Defines a custom smartctl command to obtain the SMART attributes
+# for each disk. This may be required for RAID controllers and for
+# some USB disk that cannot be autodetected.
+# In the specified options, the "%s" string is replaced by the device name.
+# Refers at the smartmontools documentation about the possible options:
+# RAID -> https://www.smartmontools.org/wiki/Supported_RAID-Controllers
+# USB -> https://www.smartmontools.org/wiki/Supported_USB-Devices
+#smartctl d1 -d sat %s
+#smartctl d2 -d usbjmicron %s
+#smartctl parity -d areca,1/1 /dev/sg0
+#smartctl 2-parity -d areca,2/1 /dev/sg0
+
--- a/debian/source/format
+++ b/debian/source/format
@ -0,0 +1 @@
+3.0 (quilt)
--- a/debian/watch
+++ b/debian/watch
@ -0,0 +1,2 @@
+version=3
+https://github.com/amadvance/snapraid/releases .*snapraid-([0-9.]*\.[0-9.]*).tar.gz
--- a/raid/raid.h
+++ b/raid/raid.h
@ -192,7 +192,7 @@ int raid_check(int nr, int *ir, int nd, int np, size_t size, void **v);
 * This function identifies the failed data and parity blocks using the
 * available redundancy.
 *
- * It uses a brute force method, and then the call can be expansive.
+ * It uses a brute force method, and then the call can be expensive.
 * The expected execution time is proportional at the binomial coefficient
 * @np + @nd choose @np - 1, usually written as:
 *
--- a/tommyds/tommyhashdyn.h
+++ b/tommyds/tommyhashdyn.h
@ -35,7 +35,7 @@
 * All the elements are reallocated in a single resize operation done inside
 * tommy_hashdyn_insert() or tommy_hashdyn_remove().
 *
- * Note that the resize operation takes approximatively 100 [ms] with 1 million of elements,
+ * Note that the resize operation takes approximately 100 [ms] with 1 million of elements,
 * and 1 [second] with 10 millions. This could be a problem in real-time applications.
 *
 * The resize also fragment the heap, as it involves allocating a double-sized table, copy elements,
Author	SHA1	Message	Date
Mario Fetka	73b05cde71	Merge tag 'upstream/12.2' Upstream version 12.2	2023-07-01 12:07:26 +02:00
Mario Fetka	1aa8d4d499	Imported Upstream version 12.2	2023-07-01 12:07:26 +02:00
Mario Fetka	2285cff2a6	Roleback	2021-10-03 10:07:58 +02:00
Mario Fetka	a311749e46	Merge tag 'upstream/11.6' Upstream version 11.6	2021-10-03 10:04:54 +02:00
Mario Fetka	d767689d60	Bump	2020-09-11 13:43:22 +02:00
Mario Fetka	1dd99167db	Merge tag 'upstream/11.5' Upstream version 11.5	2020-09-11 13:42:24 +02:00
Mario Fetka	859826a091	Bump	2019-01-07 14:42:44 +01:00
Mario Fetka	36b5ac9c36	Merge tag 'upstream/11.3' Upstream version 11.3	2019-01-07 14:41:49 +01:00
Mario Fetka	cfd0df25f8	Bump	2019-01-07 14:09:54 +01:00
Maxim Tikhonov	2e8fba7836	Imported Debian patch 11.2-0tikhonov1~xenial	2019-01-07 14:06:17 +01:00
 @ -1 +1 @@
 .6
 .2