Adding upstream version 1:2.3.19.1+dfsg1.upstream/1%2.3.19.1+dfsg1upstream

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

9 files changed, 1931 insertions, 0 deletions

diff --git a/src/plugins/old-stats/Makefile.am b/src/plugins/old-stats/Makefile.am
new file mode 100644
index 0000000..8a95363
--- /dev/null
+++ b/src/plugins/old-stats/Makefile.am
@@ -0,0 +1,33 @@
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+	-I$(top_srcdir)/src/lib-mail \
+	-I$(top_srcdir)/src/lib-master \
+	-I$(top_srcdir)/src/lib-old-stats \
+	-I$(top_srcdir)/src/lib-index \
+	-I$(top_srcdir)/src/lib-storage
+
+NOPLUGIN_LDFLAGS =
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+
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+
+lib90_old_stats_plugin_la_SOURCES = \
+	mail-stats.c \
+	mail-stats-fill.c \
+	mail-stats-connection.c \
+	stats-plugin.c
+
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+	stats-plugin.h
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+
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diff --git a/src/plugins/old-stats/Makefile.in b/src/plugins/old-stats/Makefile.in
new file mode 100644
index 0000000..be11193
--- /dev/null
+++ b/src/plugins/old-stats/Makefile.in
@@ -0,0 +1,898 @@
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+AM_CPPFLAGS = \
+	-I$(top_srcdir)/src/lib \
+	-I$(top_srcdir)/src/lib-settings \
+	-I$(top_srcdir)/src/lib-mail \
+	-I$(top_srcdir)/src/lib-master \
+	-I$(top_srcdir)/src/lib-old-stats \
+	-I$(top_srcdir)/src/lib-index \
+	-I$(top_srcdir)/src/lib-storage
+
+lib90_old_stats_plugin_la_LDFLAGS = -module -avoid-version
+module_LTLIBRARIES = \
+	lib90_old_stats_plugin.la
+
+lib90_old_stats_plugin_la_SOURCES = \
+	mail-stats.c \
+	mail-stats-fill.c \
+	mail-stats-connection.c \
+	stats-plugin.c
+
+noinst_HEADERS = \
+	mail-stats.h \
+	mail-stats-connection.h \
+	stats-plugin.h
+
+old_stats_moduledir = $(moduledir)/old-stats
+old_stats_module_LTLIBRARIES = libold_stats_mail.la
+libold_stats_mail_la_LDFLAGS = -module -avoid-version
+libold_stats_mail_la_LIBADD = mail-stats.lo $(LIBDOVECOT)
+libold_stats_mail_la_DEPENDENCIES = mail-stats.lo
+libold_stats_mail_la_SOURCES = 
+all: all-am
+
+.SUFFIXES:
+.SUFFIXES: .c .lo .o .obj
+$(srcdir)/Makefile.in: @MAINTAINER_MODE_TRUE@ $(srcdir)/Makefile.am  $(am__configure_deps)
+	@for dep in $?; do \
+	  case '$(am__configure_deps)' in \
+	    *$$dep*) \
+	      ( cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh ) \
+	        && { if test -f $@; then exit 0; else break; fi; }; \
+	      exit 1;; \
+	  esac; \
+	done; \
+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --foreign src/plugins/old-stats/Makefile'; \
+	$(am__cd) $(top_srcdir) && \
+	  $(AUTOMAKE) --foreign src/plugins/old-stats/Makefile
+Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
+	@case '$?' in \
+	  *config.status*) \
+	    cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh;; \
+	  *) \
+	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__maybe_remake_depfiles)'; \
+	    cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__maybe_remake_depfiles);; \
+	esac;
+
+$(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+
+$(top_srcdir)/configure: @MAINTAINER_MODE_TRUE@ $(am__configure_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(ACLOCAL_M4): @MAINTAINER_MODE_TRUE@ $(am__aclocal_m4_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(am__aclocal_m4_deps):
+
+install-moduleLTLIBRARIES: $(module_LTLIBRARIES)
+	@$(NORMAL_INSTALL)
+	@list='$(module_LTLIBRARIES)'; test -n "$(moduledir)" || list=; \
+	list2=; for p in $$list; do \
+	  if test -f $$p; then \
+	    list2="$$list2 $$p"; \
+	  else :; fi; \
+	done; \
+	test -z "$$list2" || { \
+	  echo " $(MKDIR_P) '$(DESTDIR)$(moduledir)'"; \
+	  $(MKDIR_P) "$(DESTDIR)$(moduledir)" || exit 1; \
+	  echo " $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL) $(INSTALL_STRIP_FLAG) $$list2 '$(DESTDIR)$(moduledir)'"; \
+	  $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL) $(INSTALL_STRIP_FLAG) $$list2 "$(DESTDIR)$(moduledir)"; \
+	}
+
+uninstall-moduleLTLIBRARIES:
+	@$(NORMAL_UNINSTALL)
+	@list='$(module_LTLIBRARIES)'; test -n "$(moduledir)" || list=; \
+	for p in $$list; do \
+	  $(am__strip_dir) \
+	  echo " $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=uninstall rm -f '$(DESTDIR)$(moduledir)/$$f'"; \
+	  $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=uninstall rm -f "$(DESTDIR)$(moduledir)/$$f"; \
+	done
+
+clean-moduleLTLIBRARIES:
+	-test -z "$(module_LTLIBRARIES)" || rm -f $(module_LTLIBRARIES)
+	@list='$(module_LTLIBRARIES)'; \
+	locs=`for p in $$list; do echo $$p; done | \
+	      sed 's|^[^/]*$$|.|; s|/[^/]*$$||; s|$$|/so_locations|' | \
+	      sort -u`; \
+	test -z "$$locs" || { \
+	  echo rm -f $${locs}; \
+	  rm -f $${locs}; \
+	}
+
+install-old_stats_moduleLTLIBRARIES: $(old_stats_module_LTLIBRARIES)
+	@$(NORMAL_INSTALL)
+	@list='$(old_stats_module_LTLIBRARIES)'; test -n "$(old_stats_moduledir)" || list=; \
+	list2=; for p in $$list; do \
+	  if test -f $$p; then \
+	    list2="$$list2 $$p"; \
+	  else :; fi; \
+	done; \
+	test -z "$$list2" || { \
+	  echo " $(MKDIR_P) '$(DESTDIR)$(old_stats_moduledir)'"; \
+	  $(MKDIR_P) "$(DESTDIR)$(old_stats_moduledir)" || exit 1; \
+	  echo " $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL) $(INSTALL_STRIP_FLAG) $$list2 '$(DESTDIR)$(old_stats_moduledir)'"; \
+	  $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL) $(INSTALL_STRIP_FLAG) $$list2 "$(DESTDIR)$(old_stats_moduledir)"; \
+	}
+
+uninstall-old_stats_moduleLTLIBRARIES:
+	@$(NORMAL_UNINSTALL)
+	@list='$(old_stats_module_LTLIBRARIES)'; test -n "$(old_stats_moduledir)" || list=; \
+	for p in $$list; do \
+	  $(am__strip_dir) \
+	  echo " $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=uninstall rm -f '$(DESTDIR)$(old_stats_moduledir)/$$f'"; \
+	  $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=uninstall rm -f "$(DESTDIR)$(old_stats_moduledir)/$$f"; \
+	done
+
+clean-old_stats_moduleLTLIBRARIES:
+	-test -z "$(old_stats_module_LTLIBRARIES)" || rm -f $(old_stats_module_LTLIBRARIES)
+	@list='$(old_stats_module_LTLIBRARIES)'; \
+	locs=`for p in $$list; do echo $$p; done | \
+	      sed 's|^[^/]*$$|.|; s|/[^/]*$$||; s|$$|/so_locations|' | \
+	      sort -u`; \
+	test -z "$$locs" || { \
+	  echo rm -f $${locs}; \
+	  rm -f $${locs}; \
+	}
+
+lib90_old_stats_plugin.la: $(lib90_old_stats_plugin_la_OBJECTS) $(lib90_old_stats_plugin_la_DEPENDENCIES) $(EXTRA_lib90_old_stats_plugin_la_DEPENDENCIES) 
+	$(AM_V_CCLD)$(lib90_old_stats_plugin_la_LINK) -rpath $(moduledir) $(lib90_old_stats_plugin_la_OBJECTS) $(lib90_old_stats_plugin_la_LIBADD) $(LIBS)
+
+libold_stats_mail.la: $(libold_stats_mail_la_OBJECTS) $(libold_stats_mail_la_DEPENDENCIES) $(EXTRA_libold_stats_mail_la_DEPENDENCIES) 
+	$(AM_V_CCLD)$(libold_stats_mail_la_LINK) -rpath $(old_stats_moduledir) $(libold_stats_mail_la_OBJECTS) $(libold_stats_mail_la_LIBADD) $(LIBS)
+
+mostlyclean-compile:
+	-rm -f *.$(OBJEXT)
+
+distclean-compile:
+	-rm -f *.tab.c
+
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/mail-stats-connection.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/mail-stats-fill.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/mail-stats.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/stats-plugin.Plo@am__quote@ # am--include-marker
+
+$(am__depfiles_remade):
+	@$(MKDIR_P) $(@D)
+	@echo '# dummy' >$@-t && $(am__mv) $@-t $@
+
+am--depfiles: $(am__depfiles_remade)
+
+.c.o:
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+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='$<' object='$@' libtool=no @AMDEPBACKSLASH@
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+
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+
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+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(LTCOMPILE) -c -o $@ $<
+
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+	-rm -f *.lo
+
+clean-libtool:
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+ID: $(am__tagged_files)
+	$(am__define_uniq_tagged_files); mkid -fID $$unique
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+	here=`pwd`; \
+	$(am__define_uniq_tagged_files); \
+	shift; \
+	if test -z "$(ETAGS_ARGS)$$*$$unique"; then :; else \
+	  test -n "$$unique" || unique=$$empty_fix; \
+	  if test $$# -gt 0; then \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      "$$@" $$unique; \
+	  else \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      $$unique; \
+	  fi; \
+	fi
+ctags: ctags-am
+
+CTAGS: ctags
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+	$(am__define_uniq_tagged_files); \
+	test -z "$(CTAGS_ARGS)$$unique" \
+	  || $(CTAGS) $(CTAGSFLAGS) $(AM_CTAGSFLAGS) $(CTAGS_ARGS) \
+	     $$unique
+
+GTAGS:
+	here=`$(am__cd) $(top_builddir) && pwd` \
+	  && $(am__cd) $(top_srcdir) \
+	  && gtags -i $(GTAGS_ARGS) "$$here"
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+
+cscopelist-am: $(am__tagged_files)
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+	  [\\/]* | ?:[\\/]*) sdir="$(srcdir)" ;; \
+	  *) sdir=$(subdir)/$(srcdir) ;; \
+	esac; \
+	for i in $$list; do \
+	  if test -f "$$i"; then \
+	    echo "$(subdir)/$$i"; \
+	  else \
+	    echo "$$sdir/$$i"; \
+	  fi; \
+	done >> $(top_builddir)/cscope.files
+
+distclean-tags:
+	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
+
+distdir: $(BUILT_SOURCES)
+	$(MAKE) $(AM_MAKEFLAGS) distdir-am
+
+distdir-am: $(DISTFILES)
+	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
+	  sed -e "s|^$$srcdirstrip/||;t" \
+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+	case $$dist_files in \
+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
+			   sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+			   sort -u` ;; \
+	esac; \
+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
+	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+	    if test -d "$(distdir)/$$file"; then \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+check: check-am
+all-am: Makefile $(LTLIBRARIES) $(HEADERS)
+installdirs:
+	for dir in "$(DESTDIR)$(moduledir)" "$(DESTDIR)$(old_stats_moduledir)"; do \
+	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
+	done
+install: install-am
+install-exec: install-exec-am
+install-data: install-data-am
+uninstall: uninstall-am
+
+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-am
+install-strip:
+	if test -z '$(STRIP)'; then \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-generic clean-libtool clean-moduleLTLIBRARIES \
+	clean-old_stats_moduleLTLIBRARIES mostlyclean-am
+
+distclean: distclean-am
+		-rm -f ./$(DEPDIR)/mail-stats-connection.Plo
+	-rm -f ./$(DEPDIR)/mail-stats-fill.Plo
+	-rm -f ./$(DEPDIR)/mail-stats.Plo
+	-rm -f ./$(DEPDIR)/stats-plugin.Plo
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
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+html: html-am
+
+html-am:
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+info: info-am
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+info-am:
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+install-data-am: install-moduleLTLIBRARIES \
+	install-old_stats_moduleLTLIBRARIES
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+install-dvi: install-dvi-am
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+install-html: install-html-am
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+install-pdf-am:
+
+install-ps: install-ps-am
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+		-rm -f ./$(DEPDIR)/mail-stats-connection.Plo
+	-rm -f ./$(DEPDIR)/mail-stats-fill.Plo
+	-rm -f ./$(DEPDIR)/mail-stats.Plo
+	-rm -f ./$(DEPDIR)/stats-plugin.Plo
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool
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+pdf: pdf-am
+
+pdf-am:
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+ps: ps-am
+
+ps-am:
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+uninstall-am: uninstall-moduleLTLIBRARIES \
+	uninstall-old_stats_moduleLTLIBRARIES
+
+.MAKE: install-am install-strip
+
+.PHONY: CTAGS GTAGS TAGS all all-am am--depfiles check check-am clean \
+	clean-generic clean-libtool clean-moduleLTLIBRARIES \
+	clean-old_stats_moduleLTLIBRARIES cscopelist-am ctags ctags-am \
+	distclean distclean-compile distclean-generic \
+	distclean-libtool distclean-tags distdir dvi dvi-am html \
+	html-am info info-am install install-am 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-moduleLTLIBRARIES \
+	install-old_stats_moduleLTLIBRARIES install-pdf install-pdf-am \
+	install-ps install-ps-am install-strip installcheck \
+	installcheck-am installdirs maintainer-clean \
+	maintainer-clean-generic mostlyclean mostlyclean-compile \
+	mostlyclean-generic mostlyclean-libtool pdf pdf-am ps ps-am \
+	tags tags-am uninstall uninstall-am \
+	uninstall-moduleLTLIBRARIES \
+	uninstall-old_stats_moduleLTLIBRARIES
+
+.PRECIOUS: Makefile
+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/plugins/old-stats/mail-stats-connection.c b/src/plugins/old-stats/mail-stats-connection.c
new file mode 100644
index 0000000..ca20fcb
--- /dev/null
+++ b/src/plugins/old-stats/mail-stats-connection.c
@@ -0,0 +1,75 @@
+/* Copyright (c) 2011-2018 Dovecot authors, see the included COPYING file */
+
+#include "lib.h"
+#include "base64.h"
+#include "hostpid.h"
+#include "net.h"
+#include "str.h"
+#include "strescape.h"
+#include "mail-storage.h"
+#include "stats.h"
+#include "stats-plugin.h"
+#include "mail-stats-connection.h"
+
+int mail_stats_connection_connect(struct stats_connection *conn,
+				  struct mail_user *user)
+{
+	struct stats_user *suser = STATS_USER_CONTEXT_REQUIRE(user);
+	string_t *str = t_str_new(128);
+
+	str_append(str, "CONNECT\t");
+	/* required fields */
+	str_append(str, suser->stats_session_id);
+	str_append_c(str, '\t');
+	str_append_tabescaped(str, user->username);
+	str_append_c(str, '\t');
+	str_append_tabescaped(str, user->service);
+	str_printfa(str, "\t%s", my_pid);
+
+	/* optional fields */
+	if (user->conn.local_ip != NULL) {
+		str_append(str, "\tlip=");
+		str_append(str, net_ip2addr(user->conn.local_ip));
+	}
+	if (user->conn.remote_ip != NULL) {
+		str_append(str, "\trip=");
+		str_append(str, net_ip2addr(user->conn.remote_ip));
+	}
+	str_append_c(str, '\n');
+	return stats_connection_send(conn, str);
+}
+
+void mail_stats_connection_disconnect(struct stats_connection *conn,
+				      struct mail_user *user)
+{
+	struct stats_user *suser = STATS_USER_CONTEXT_REQUIRE(user);
+	string_t *str = t_str_new(128);
+
+	str_append(str, "DISCONNECT\t");
+	str_append(str, suser->stats_session_id);
+	str_append_c(str, '\n');
+	if (stats_connection_send(conn, str) < 0) {
+		/* we could retry this later, but stats process will forget it
+		   anyway after 15 minutes. */
+	}
+}
+
+void mail_stats_connection_send_session(struct stats_connection *conn,
+					struct mail_user *user,
+					const struct stats *stats)
+{
+	struct stats_user *suser = STATS_USER_CONTEXT_REQUIRE(user);
+	string_t *str = t_str_new(256);
+	buffer_t *buf;
+
+	buf = t_buffer_create(128);
+	stats_export(buf, stats);
+
+	str_append(str, "UPDATE-SESSION\t");
+	str_append(str, suser->stats_session_id);
+	str_append_c(str, '\t');
+	base64_encode(buf->data, buf->used, str);
+
+	str_append_c(str, '\n');
+	(void)stats_connection_send(conn, str);
+}
diff --git a/src/plugins/old-stats/mail-stats-connection.h b/src/plugins/old-stats/mail-stats-connection.h
new file mode 100644
index 0000000..f98b691
--- /dev/null
+++ b/src/plugins/old-stats/mail-stats-connection.h
@@ -0,0 +1,19 @@
+#ifndef MAIL_STATS_CONNECTION_H
+#define MAIL_STATS_CONNECTION_H
+
+#include "stats-connection.h"
+
+struct mail_stats;
+struct mail_user;
+
+int mail_stats_connection_connect(struct stats_connection *conn,
+				  struct mail_user *user);
+void mail_stats_connection_disconnect(struct stats_connection *conn,
+				      struct mail_user *user);
+
+void mail_stats_connection_send_session(struct stats_connection *conn,
+					struct mail_user *user,
+					const struct stats *stats);
+void mail_stats_connection_send(struct stats_connection *conn, const string_t *str);
+
+#endif
diff --git a/src/plugins/old-stats/mail-stats-fill.c b/src/plugins/old-stats/mail-stats-fill.c
new file mode 100644
index 0000000..10d8c39
--- /dev/null
+++ b/src/plugins/old-stats/mail-stats-fill.c
@@ -0,0 +1,156 @@
+/* Copyright (c) 2011-2018 Dovecot authors, see the included COPYING file */
+
+#include "lib.h"
+#include "time-util.h"
+#include "stats-plugin.h"
+#include "mail-stats.h"
+
+#include <sys/resource.h>
+
+#define PROC_IO_PATH "/proc/self/io"
+
+static bool proc_io_disabled = FALSE;
+static int proc_io_fd = -1;
+
+static int
+process_io_buffer_parse(const char *buf, struct mail_stats *stats)
+{
+	const char *const *tmp;
+
+	tmp = t_strsplit(buf, "\n");
+	for (; *tmp != NULL; tmp++) {
+		if (str_begins(*tmp, "rchar: ")) {
+			if (str_to_uint64(*tmp + 7, &stats->read_bytes) < 0)
+				return -1;
+		} else if (str_begins(*tmp, "wchar: ")) {
+			if (str_to_uint64(*tmp + 7, &stats->write_bytes) < 0)
+				return -1;
+		} else if (str_begins(*tmp, "syscr: ")) {
+			if (str_to_uint32(*tmp + 7, &stats->read_count) < 0)
+				return -1;
+		} else if (str_begins(*tmp, "syscw: ")) {
+			if (str_to_uint32(*tmp + 7, &stats->write_count) < 0)
+				return -1;
+		}
+	}
+	return 0;
+}
+
+static int process_io_open(void)
+{
+	uid_t uid;
+
+	if (proc_io_fd != -1)
+		return proc_io_fd;
+
+	if (proc_io_disabled)
+		return -1;
+
+	proc_io_fd = open(PROC_IO_PATH, O_RDONLY);
+	if (proc_io_fd == -1 && errno == EACCES) {
+		/* kludge: if we're running with permissions temporarily
+		   dropped, get them temporarily back so we can open
+		   /proc/self/io. */
+		uid = geteuid();
+		if (seteuid(0) == 0) {
+			proc_io_fd = open(PROC_IO_PATH, O_RDONLY);
+			if (seteuid(uid) < 0) {
+				/* oops, this is bad */
+				i_fatal("stats: seteuid(%s) failed", dec2str(uid));
+			}
+		}
+		errno = EACCES;
+	}
+	if (proc_io_fd == -1) {
+		/* ignore access errors too, certain security options can
+		   prevent root access to this file when not owned by root */
+		if (errno != ENOENT && errno != EACCES)
+			i_error("open(%s) failed: %m", PROC_IO_PATH);
+		proc_io_disabled = TRUE;
+		return -1;
+	}
+	return proc_io_fd;
+}
+
+static void process_read_io_stats(struct mail_stats *stats)
+{
+	char buf[1024];
+	int fd, ret;
+
+	if ((fd = process_io_open()) == -1)
+		return;
+
+	ret = pread(fd, buf, sizeof(buf), 0);
+	if (ret <= 0) {
+		if (ret == -1)
+			i_error("read(%s) failed: %m", PROC_IO_PATH);
+		else
+			i_error("read(%s) returned EOF", PROC_IO_PATH);
+	} else if (ret == sizeof(buf)) {
+		/* just shouldn't happen.. */
+		i_error("%s is larger than expected", PROC_IO_PATH);
+		proc_io_disabled = TRUE;
+	} else {
+		buf[ret] = '\0';
+		T_BEGIN {
+			if (process_io_buffer_parse(buf, stats) < 0) {
+				i_error("Invalid input in file %s",
+					PROC_IO_PATH);
+				proc_io_disabled = TRUE;
+			}
+		} T_END;
+	}
+}
+
+static void
+user_trans_stats_get(struct stats_user *suser, struct mail_stats *dest_r)
+{
+	struct stats_transaction_context *strans;
+
+	mail_stats_add_transaction(dest_r, &suser->finished_transaction_stats);
+	for (strans = suser->transactions; strans != NULL; strans = strans->next)
+		mail_stats_add_transaction(dest_r, &strans->trans->stats);
+}
+
+void mail_stats_fill(struct stats_user *suser, struct mail_stats *stats_r)
+{
+	static bool getrusage_broken = FALSE;
+	static struct rusage prev_usage;
+	struct rusage usage;
+
+	i_zero(stats_r);
+	/* cputime */
+	if (getrusage(RUSAGE_SELF, &usage) < 0) {
+		if (!getrusage_broken) {
+			i_error("getrusage() failed: %m");
+			getrusage_broken = TRUE;
+		}
+		usage = prev_usage;
+	} else if (timeval_diff_usecs(&usage.ru_stime, &prev_usage.ru_stime) < 0) {
+		/* This seems to be a Linux bug. */
+		usage.ru_stime = prev_usage.ru_stime;
+	}
+	prev_usage = usage;
+
+	stats_r->user_cpu = usage.ru_utime;
+	stats_r->sys_cpu = usage.ru_stime;
+	stats_r->min_faults = usage.ru_minflt;
+	stats_r->maj_faults = usage.ru_majflt;
+	stats_r->vol_cs = usage.ru_nvcsw;
+	stats_r->invol_cs = usage.ru_nivcsw;
+	stats_r->disk_input = (unsigned long long)usage.ru_inblock * 512ULL;
+	stats_r->disk_output = (unsigned long long)usage.ru_oublock * 512ULL;
+	i_gettimeofday(&stats_r->clock_time);
+	process_read_io_stats(stats_r);
+	user_trans_stats_get(suser, stats_r);
+}
+
+void mail_stats_global_preinit(void)
+{
+	(void)process_io_open();
+}
+
+void mail_stats_fill_global_deinit(void)
+{
+	i_close_fd(&proc_io_fd);
+}
diff --git a/src/plugins/old-stats/mail-stats.c b/src/plugins/old-stats/mail-stats.c
new file mode 100644
index 0000000..3662d23
--- /dev/null
+++ b/src/plugins/old-stats/mail-stats.c
@@ -0,0 +1,168 @@
+/* Copyright (c) 2011-2018 Dovecot authors, see the included COPYING file */
+
+#include "lib.h"
+#include "time-util.h"
+#include "stats.h"
+#include "stats-parser.h"
+#include "mail-stats.h"
+
+static struct stats_parser_field mail_stats_fields[] = {
+#define E(parsename, name, type) { parsename, offsetof(struct mail_stats, name), sizeof(((struct mail_stats *)0)->name), type }
+#define EN(parsename, name) E(parsename, name, STATS_PARSER_TYPE_UINT)
+	E("user_cpu", user_cpu, STATS_PARSER_TYPE_TIMEVAL),
+	E("sys_cpu", sys_cpu, STATS_PARSER_TYPE_TIMEVAL),
+	E("clock_time", clock_time, STATS_PARSER_TYPE_TIMEVAL),
+	EN("min_faults", min_faults),
+	EN("maj_faults", maj_faults),
+	EN("vol_cs", vol_cs),
+	EN("invol_cs", invol_cs),
+	EN("disk_input", disk_input),
+	EN("disk_output", disk_output),
+
+	EN("read_count", read_count),
+	EN("read_bytes", read_bytes),
+	EN("write_count", write_count),
+	EN("write_bytes", write_bytes),
+
+	/*EN("mopen", trans_stats.open_lookup_count),
+	EN("mstat", trans_stats.stat_lookup_count),
+	EN("mfstat", trans_stats.fstat_lookup_count),*/
+	EN("mail_lookup_path", trans_lookup_path),
+	EN("mail_lookup_attr", trans_lookup_attr),
+	EN("mail_read_count", trans_files_read_count),
+	EN("mail_read_bytes", trans_files_read_bytes),
+	EN("mail_cache_hits", trans_cache_hit_count)
+};
+
+static size_t mail_stats_alloc_size(void)
+{
+	return sizeof(struct mail_stats);
+}
+
+static unsigned int mail_stats_field_count(void)
+{
+	return N_ELEMENTS(mail_stats_fields);
+}
+
+static const char *mail_stats_field_name(unsigned int n)
+{
+	i_assert(n < N_ELEMENTS(mail_stats_fields));
+
+	return mail_stats_fields[n].name;
+}
+
+static void
+mail_stats_field_value(string_t *str, const struct stats *stats,
+		       unsigned int n)
+{
+	i_assert(n < N_ELEMENTS(mail_stats_fields));
+
+	stats_parser_value(str, &mail_stats_fields[n], stats);
+}
+
+static bool
+mail_stats_diff(const struct stats *stats1, const struct stats *stats2,
+		struct stats *diff_stats_r, const char **error_r)
+{
+	return stats_parser_diff(mail_stats_fields, N_ELEMENTS(mail_stats_fields),
+				 stats1, stats2, diff_stats_r, error_r);
+}
+
+static void mail_stats_add(struct stats *dest, const struct stats *src)
+{
+	stats_parser_add(mail_stats_fields, N_ELEMENTS(mail_stats_fields),
+			 dest, src);
+}
+
+static bool
+mail_stats_have_changed(const struct stats *_prev, const struct stats *_cur)
+{
+	const struct mail_stats *prev = (const struct mail_stats *)_prev;
+	const struct mail_stats *cur = (const struct mail_stats *)_cur;
+
+	if (cur->disk_input != prev->disk_input ||
+	    cur->disk_output != prev->disk_output ||
+	    cur->trans_lookup_path != prev->trans_lookup_path ||
+	    cur->trans_lookup_attr != prev->trans_lookup_attr ||
+	    cur->trans_files_read_count != prev->trans_files_read_count ||
+	    cur->trans_files_read_bytes != prev->trans_files_read_bytes ||
+	    cur->trans_cache_hit_count != prev->trans_cache_hit_count)
+		return TRUE;
+
+	/* allow a tiny bit of changes that are caused by this
+	   timeout handling */
+	if (timeval_diff_msecs(&cur->user_cpu, &prev->user_cpu) != 0)
+		return TRUE;
+	if (timeval_diff_msecs(&cur->sys_cpu, &prev->sys_cpu) != 0)
+		return TRUE;
+
+	if (cur->maj_faults > prev->maj_faults+10)
+		return TRUE;
+	if (cur->invol_cs > prev->invol_cs+10)
+		return TRUE;
+	/* don't check for read/write count/bytes changes, since they get
+	   changed by stats checking itself */
+	return FALSE;
+}
+
+static void mail_stats_export(buffer_t *buf, const struct stats *_stats)
+{
+	const struct mail_stats *stats = (const struct mail_stats *)_stats;
+
+	buffer_append(buf, stats, sizeof(*stats));
+}
+
+static bool
+mail_stats_import(const unsigned char *data, size_t size, size_t *pos_r,
+		  struct stats *_stats, const char **error_r)
+{
+	struct mail_stats *stats = (struct mail_stats *)_stats;
+
+	if (size < sizeof(*stats)) {
+		*error_r = "mail_stats too small";
+		return FALSE;
+	}
+	memcpy(stats, data, sizeof(*stats));
+	*pos_r = sizeof(*stats);
+	return TRUE;
+}
+
+void mail_stats_add_transaction(struct mail_stats *stats,
+				const struct mailbox_transaction_stats *trans_stats)
+{
+	stats->trans_lookup_path += trans_stats->open_lookup_count;
+	stats->trans_lookup_attr += trans_stats->stat_lookup_count +
+		trans_stats->fstat_lookup_count;
+	stats->trans_files_read_count += trans_stats->files_read_count;
+	stats->trans_files_read_bytes += trans_stats->files_read_bytes;
+	stats->trans_cache_hit_count += trans_stats->cache_hit_count;
+}
+
+const struct stats_vfuncs mail_stats_vfuncs = {
+	"mail",
+	mail_stats_alloc_size,
+	mail_stats_field_count,
+	mail_stats_field_name,
+	mail_stats_field_value,
+	mail_stats_diff,
+	mail_stats_add,
+	mail_stats_have_changed,
+	mail_stats_export,
+	mail_stats_import
+};
+
+/* for the stats_mail plugin: */
+void old_stats_mail_init(void);
+void old_stats_mail_deinit(void);
+
+static struct stats_item *mail_stats_item;
+
+void old_stats_mail_init(void)
+{
+	mail_stats_item = stats_register(&mail_stats_vfuncs);
+}
+
+void old_stats_mail_deinit(void)
+{
+	stats_unregister(&mail_stats_item);
+}
diff --git a/src/plugins/old-stats/mail-stats.h b/src/plugins/old-stats/mail-stats.h
new file mode 100644
index 0000000..7254b69
--- /dev/null
+++ b/src/plugins/old-stats/mail-stats.h
@@ -0,0 +1,41 @@
+#ifndef MAIL_STATS_H
+#define MAIL_STATS_H
+
+#include <sys/time.h>
+#include "mail-storage-private.h"
+
+struct stats_user;
+
+struct mail_stats {
+	/* user/system CPU time used */
+	struct timeval user_cpu, sys_cpu;
+	/* clock time used (not counting the time in ioloop wait) */
+	struct timeval clock_time;
+	/* minor / major page faults */
+	uint32_t min_faults, maj_faults;
+	/* voluntary / involuntary context switches */
+	uint32_t vol_cs, invol_cs;
+	/* disk input/output bytes */
+	uint64_t disk_input, disk_output;
+	/* read()/write() syscall count and number of bytes */
+	uint32_t read_count, write_count;
+	uint64_t read_bytes, write_bytes;
+
+	/* based on struct mailbox_transaction_stats: */
+	uint32_t trans_lookup_path;
+	uint32_t trans_lookup_attr;
+	uint32_t trans_files_read_count;
+	uint64_t trans_files_read_bytes;
+	uint64_t trans_cache_hit_count;
+};
+
+extern const struct stats_vfuncs mail_stats_vfuncs;
+
+void mail_stats_fill(struct stats_user *suser, struct mail_stats *mail_stats);
+void mail_stats_add_transaction(struct mail_stats *stats,
+				const struct mailbox_transaction_stats *trans_stats);
+
+void mail_stats_global_preinit(void);
+void mail_stats_fill_global_deinit(void);
+
+#endif
diff --git a/src/plugins/old-stats/stats-plugin.c b/src/plugins/old-stats/stats-plugin.c
new file mode 100644
index 0000000..9d33016
--- /dev/null
+++ b/src/plugins/old-stats/stats-plugin.c
@@ -0,0 +1,481 @@
+/* Copyright (c) 2011-2018 Dovecot authors, see the included COPYING file */
+
+#include "lib.h"
+#include "ioloop.h"
+#include "llist.h"
+#include "str.h"
+#include "time-util.h"
+#include "settings-parser.h"
+#include "mail-stats.h"
+#include "stats.h"
+#include "mail-stats-connection.h"
+#include "stats-plugin.h"
+
+#define STATS_CONTEXT(obj) \
+	MODULE_CONTEXT(obj, stats_storage_module)
+#define STATS_CONTEXT_REQUIRE(obj) \
+	MODULE_CONTEXT_REQUIRE(obj, stats_storage_module)
+
+/* If session isn't refreshed every 15 minutes, it's dropped.
+   Must be smaller than MAIL_SESSION_IDLE_TIMEOUT_MSECS in stats server */
+#define SESSION_STATS_FORCE_REFRESH_SECS (5*60)
+#define REFRESH_CHECK_INTERVAL 100
+#define MAIL_STATS_FIFO_NAME "old-stats-mail"
+
+struct stats_storage {
+	union mail_storage_module_context module_ctx;
+
+	struct mail_storage_callbacks old_callbacks;
+	void *old_context;
+};
+
+struct stats_mailbox {
+	union mailbox_module_context module_ctx;
+};
+
+const char *stats_plugin_version = DOVECOT_ABI_VERSION;
+
+struct stats_user_module stats_user_module =
+	MODULE_CONTEXT_INIT(&mail_user_module_register);
+struct stats_storage_module stats_storage_module =
+	MODULE_CONTEXT_INIT(&mail_storage_module_register);
+
+static struct stats_item *mail_stats_item;
+static struct stats_connection *global_stats_conn = NULL;
+static struct mail_user *stats_global_user = NULL;
+static unsigned int stats_user_count = 0;
+
+static void session_stats_refresh_timeout(struct mail_user *user);
+
+static void stats_io_activate(struct mail_user *user)
+{
+	struct stats_user *suser = STATS_USER_CONTEXT_REQUIRE(user);
+	struct mail_stats *mail_stats;
+
+	if (stats_user_count == 1) {
+		/* the first user sets the global user. the second user sets
+		   it to NULL. when we get back to one user we'll need to set
+		   the global user again somewhere. do it here. */
+		stats_global_user = user;
+		/* skip time spent waiting in ioloop */
+		mail_stats = stats_fill_ptr(suser->pre_io_stats, mail_stats_item);
+		mail_stats->clock_time = ioloop_timeval;
+	} else {
+		i_assert(stats_global_user == NULL);
+
+		mail_user_stats_fill(user, suser->pre_io_stats);
+	}
+}
+
+static void stats_add_session(struct mail_user *user)
+{
+	struct stats_user *suser = STATS_USER_CONTEXT_REQUIRE(user);
+	struct stats *new_stats, *diff_stats;
+	const char *error;
+
+	new_stats = stats_alloc(pool_datastack_create());
+	diff_stats = stats_alloc(pool_datastack_create());
+
+	mail_user_stats_fill(user, new_stats);
+	/* we'll count new_stats-pre_io_stats and add the changes to
+	   session_stats. the new_stats can't be directly copied to
+	   session_stats because there are some fields that don't start from
+	   zero, like clock_time. (actually with stats_global_user code we're
+	   requiring that clock_time is the only such field..) */
+	if (!stats_diff(suser->pre_io_stats, new_stats, diff_stats, &error))
+		i_error("stats: session stats shrank: %s", error);
+	stats_add(suser->session_stats, diff_stats);
+	/* copying is only needed if stats_global_user=NULL */
+	stats_copy(suser->pre_io_stats, new_stats);
+}
+
+static bool
+session_stats_need_send(struct stats_user *suser, time_t now,
+			bool *changed_r, unsigned int *to_next_secs_r)
+{
+	unsigned int diff;
+
+	*to_next_secs_r = SESSION_STATS_FORCE_REFRESH_SECS;
+
+	if (stats_have_changed(suser->last_sent_session_stats,
+			       suser->session_stats)) {
+		*to_next_secs_r = suser->refresh_secs;
+		*changed_r = TRUE;
+		return TRUE;
+	}
+	*changed_r = FALSE;
+
+	diff = now - suser->last_session_update;
+	if (diff >= SESSION_STATS_FORCE_REFRESH_SECS)
+		return TRUE;
+	*to_next_secs_r = SESSION_STATS_FORCE_REFRESH_SECS - diff;
+
+	if (!suser->session_sent_duplicate) {
+		if (suser->last_session_update != now) {
+			/* send one duplicate notification so stats reader
+			   knows that this session is idle now */
+			return TRUE;
+		}
+	}
+	return FALSE;
+}
+
+static void session_stats_refresh(struct mail_user *user)
+{
+	struct stats_user *suser = STATS_USER_CONTEXT_REQUIRE(user);
+	unsigned int to_next_secs;
+	time_t now = time(NULL);
+	bool changed;
+
+	if (!suser->stats_connected) {
+		if (mail_stats_connection_connect(suser->stats_conn, user) == 0)
+			suser->stats_connected = TRUE;
+	}
+	if (session_stats_need_send(suser, now, &changed, &to_next_secs) &&
+	    suser->stats_connected) {
+		suser->session_sent_duplicate = !changed;
+		suser->last_session_update = now;
+		stats_copy(suser->last_sent_session_stats, suser->session_stats);
+		mail_stats_connection_send_session(suser->stats_conn, user,
+						   suser->session_stats);
+	}
+
+	timeout_remove(&suser->to_stats_timeout);
+	suser->to_stats_timeout =
+		timeout_add(to_next_secs*1000,
+			    session_stats_refresh_timeout, user);
+}
+
+static struct mailbox_transaction_context *
+stats_transaction_begin(struct mailbox *box,
+			enum mailbox_transaction_flags flags,
+			const char *reason)
+{
+	struct stats_user *suser = STATS_USER_CONTEXT_REQUIRE(box->storage->user);
+	struct stats_mailbox *sbox = STATS_CONTEXT_REQUIRE(box);
+	struct mailbox_transaction_context *trans;
+	struct stats_transaction_context *strans;
+
+	trans = sbox->module_ctx.super.transaction_begin(box, flags, reason);
+	trans->stats_track = TRUE;
+
+	strans = i_new(struct stats_transaction_context, 1);
+	strans->trans = trans;
+	DLLIST_PREPEND(&suser->transactions, strans);
+
+	MODULE_CONTEXT_SET(trans, stats_storage_module, strans);
+	return trans;
+}
+
+static void stats_transaction_free(struct stats_user *suser,
+				   struct stats_transaction_context *strans)
+{
+	const struct mailbox_transaction_stats *src = &strans->trans->stats;
+	struct mailbox_transaction_stats *dest =
+		&suser->finished_transaction_stats;
+
+	DLLIST_REMOVE(&suser->transactions, strans);
+
+	dest->open_lookup_count += src->open_lookup_count;
+	dest->stat_lookup_count += src->stat_lookup_count;
+	dest->fstat_lookup_count += src->fstat_lookup_count;
+	dest->files_read_count += src->files_read_count;
+	dest->files_read_bytes += src->files_read_bytes;
+	dest->cache_hit_count += src->cache_hit_count;
+	i_free(strans);
+}
+
+static int
+stats_transaction_commit(struct mailbox_transaction_context *ctx,
+			 struct mail_transaction_commit_changes *changes_r)
+{
+	struct stats_transaction_context *strans = STATS_CONTEXT_REQUIRE(ctx);
+	struct stats_mailbox *sbox = STATS_CONTEXT_REQUIRE(ctx->box);
+	struct stats_user *suser = STATS_USER_CONTEXT_REQUIRE(ctx->box->storage->user);
+
+	stats_transaction_free(suser, strans);
+	return sbox->module_ctx.super.transaction_commit(ctx, changes_r);
+}
+
+static void
+stats_transaction_rollback(struct mailbox_transaction_context *ctx)
+{
+	struct stats_transaction_context *strans = STATS_CONTEXT_REQUIRE(ctx);
+	struct stats_mailbox *sbox = STATS_CONTEXT_REQUIRE(ctx->box);
+	struct stats_user *suser = STATS_USER_CONTEXT_REQUIRE(ctx->box->storage->user);
+
+	stats_transaction_free(suser, strans);
+	sbox->module_ctx.super.transaction_rollback(ctx);
+}
+
+static bool stats_search_next_nonblock(struct mail_search_context *ctx,
+				       struct mail **mail_r, bool *tryagain_r)
+{
+	struct stats_mailbox *sbox = STATS_CONTEXT_REQUIRE(ctx->transaction->box);
+	struct mail_user *user = ctx->transaction->box->storage->user;
+	struct stats_user *suser = STATS_USER_CONTEXT_REQUIRE(user);
+	bool ret;
+
+	ret = sbox->module_ctx.super.
+		search_next_nonblock(ctx, mail_r, tryagain_r);
+	if (!ret && !*tryagain_r) {
+		/* end of search */
+		return FALSE;
+	}
+
+	if (*tryagain_r ||
+	    ++suser->refresh_check_counter % REFRESH_CHECK_INTERVAL == 0) {
+		/* a) retrying, so this is a long running search.
+		   b) we've returned enough matches */
+		if (time(NULL) != suser->last_session_update)
+			session_stats_refresh(user);
+	}
+	return ret;
+}
+
+static void
+stats_notify_ok(struct mailbox *box, const char *text, void *context)
+{
+	struct stats_storage *sstorage = STATS_CONTEXT_REQUIRE(box->storage);
+
+	/* most importantly we want to refresh stats for very long running
+	   mailbox syncs */
+	session_stats_refresh(box->storage->user);
+
+	if (sstorage->old_callbacks.notify_ok != NULL)
+		sstorage->old_callbacks.notify_ok(box, text, context);
+}
+
+static void stats_register_notify_callbacks(struct mail_storage *storage)
+{
+	struct stats_storage *sstorage = STATS_CONTEXT(storage);
+
+	if (sstorage != NULL)
+		return;
+
+	sstorage = p_new(storage->pool, struct stats_storage, 1);
+	sstorage->old_callbacks = storage->callbacks;
+	storage->callbacks.notify_ok = stats_notify_ok;
+
+	MODULE_CONTEXT_SET(storage, stats_storage_module, sstorage);
+}
+
+static void stats_mailbox_allocated(struct mailbox *box)
+{
+	struct mailbox_vfuncs *v = box->vlast;
+	struct stats_mailbox *sbox;
+	struct stats_user *suser = STATS_USER_CONTEXT(box->storage->user);
+
+	if (suser == NULL)
+		return;
+
+	stats_register_notify_callbacks(box->storage);
+
+	sbox = p_new(box->pool, struct stats_mailbox, 1);
+	sbox->module_ctx.super = *v;
+	box->vlast = &sbox->module_ctx.super;
+
+	v->transaction_begin = stats_transaction_begin;
+	v->transaction_commit = stats_transaction_commit;
+	v->transaction_rollback = stats_transaction_rollback;
+	v->search_next_nonblock = stats_search_next_nonblock;
+	MODULE_CONTEXT_SET(box, stats_storage_module, sbox);
+}
+
+static void session_stats_refresh_timeout(struct mail_user *user)
+{
+	if (stats_global_user != NULL)
+		stats_add_session(user);
+	session_stats_refresh(user);
+}
+
+static void stats_io_deactivate(struct mail_user *user)
+{
+	struct stats_user *suser = STATS_USER_CONTEXT_REQUIRE(user);
+	unsigned int last_update_secs;
+
+	if (stats_global_user == NULL)
+		stats_add_session(user);
+
+	last_update_secs = time(NULL) - suser->last_session_update;
+	if (last_update_secs >= suser->refresh_secs) {
+		if (stats_global_user != NULL)
+			stats_add_session(user);
+		session_stats_refresh(user);
+	} else if (suser->to_stats_timeout == NULL) {
+		suser->to_stats_timeout =
+			timeout_add(suser->refresh_secs*1000,
+				    session_stats_refresh_timeout, user);
+	}
+}
+
+static void stats_user_stats_fill(struct mail_user *user, struct stats *stats)
+{
+	struct stats_user *suser = STATS_USER_CONTEXT_REQUIRE(user);
+	struct mail_stats *mail_stats;
+
+	mail_stats = stats_fill_ptr(stats, mail_stats_item);
+	mail_stats_fill(suser, mail_stats);
+
+	suser->module_ctx.super.stats_fill(user, stats);
+}
+
+static void stats_user_deinit(struct mail_user *user)
+{
+	struct stats_user *suser = STATS_USER_CONTEXT_REQUIRE(user);
+	struct stats_connection *stats_conn = suser->stats_conn;
+
+	i_assert(stats_user_count > 0);
+
+	stats_user_count--;
+	if (stats_global_user != NULL) {
+		/* we were updating the session lazily. do one final update. */
+		i_assert(stats_global_user == user);
+		stats_add_session(user);
+		stats_global_user = NULL;
+	}
+
+	io_loop_context_remove_callbacks(suser->ioloop_ctx,
+					 stats_io_activate,
+					 stats_io_deactivate, user);
+	/* send final stats before disconnection */
+	session_stats_refresh(user);
+	if (suser->stats_connected)
+		mail_stats_connection_disconnect(stats_conn, user);
+
+	timeout_remove(&suser->to_stats_timeout);
+	suser->module_ctx.super.deinit(user);
+
+	stats_connection_unref(&stats_conn);
+}
+
+static void stats_user_created(struct mail_user *user)
+{
+	struct ioloop_context *ioloop_ctx =
+		io_loop_get_current_context(current_ioloop);
+	struct stats_user *suser;
+	struct mail_user_vfuncs *v = user->vlast;
+	const char *path, *str, *error;
+	unsigned int refresh_secs;
+
+	if (ioloop_ctx == NULL) {
+		/* we're probably running some test program, or at least
+		   mail-storage-service wasn't used to create this user.
+		   disable stats tracking. */
+		return;
+	}
+	if (user->autocreated) {
+		/* lda / shared user. we're not tracking this one. */
+		return;
+	}
+
+	/* get refresh time */
+	str = mail_user_plugin_getenv(user, "old_stats_refresh");
+	if (str == NULL)
+		return;
+	if (settings_get_time(str, &refresh_secs, &error) < 0) {
+		i_error("stats: Invalid old_stats_refresh setting: %s", error);
+		return;
+	}
+	if (refresh_secs == 0)
+		return;
+	if (refresh_secs > SESSION_STATS_FORCE_REFRESH_SECS) {
+		i_warning("stats: stats_refresh too large, changing to %u",
+			  SESSION_STATS_FORCE_REFRESH_SECS);
+		refresh_secs = SESSION_STATS_FORCE_REFRESH_SECS;
+	}
+
+	if (global_stats_conn == NULL) {
+		path = mail_user_plugin_getenv(user, "old_stats_notify_path");
+		if (path == NULL)
+			path = MAIL_STATS_FIFO_NAME;
+		if (path[0] != '/')
+			path = t_strconcat(user->set->base_dir, "/", path, NULL);
+		global_stats_conn = stats_connection_create(path);
+	}
+	stats_connection_ref(global_stats_conn);
+
+	if (stats_user_count == 0) {
+		/* first user connection */
+		stats_global_user = user;
+	} else if (stats_user_count == 1) {
+		/* second user connection. we'll need to start doing
+		   per-io callback tracking now. (we might have been doing it
+		   also previously but just temporarily quickly dropped to
+		   having 1 user, in which case stats_global_user=NULL) */
+		if (stats_global_user != NULL) {
+			stats_add_session(stats_global_user);
+			stats_global_user = NULL;
+		}
+	}
+	stats_user_count++;
+
+	suser = p_new(user->pool, struct stats_user, 1);
+	suser->module_ctx.super = *v;
+	user->vlast = &suser->module_ctx.super;
+	v->deinit = stats_user_deinit;
+	v->stats_fill = stats_user_stats_fill;
+
+	suser->refresh_secs = refresh_secs;
+	if (mail_user_plugin_getenv_bool(user, "old_stats_track_cmds"))
+		suser->track_commands = TRUE;
+
+	suser->stats_conn = global_stats_conn;
+	if (user->session_id != NULL && user->session_id[0] != '\0')
+		suser->stats_session_id = user->session_id;
+	else {
+		guid_128_t guid;
+
+		guid_128_generate(guid);
+		suser->stats_session_id =
+			p_strdup(user->pool, guid_128_to_string(guid));
+	}
+	suser->last_session_update = time(NULL);
+	user->stats_enabled = TRUE;
+
+	suser->ioloop_ctx = ioloop_ctx;
+	io_loop_context_add_callbacks(ioloop_ctx,
+				      stats_io_activate,
+				      stats_io_deactivate, user);
+
+	suser->pre_io_stats = stats_alloc(user->pool);
+	suser->session_stats = stats_alloc(user->pool);
+	suser->last_sent_session_stats = stats_alloc(user->pool);
+
+	MODULE_CONTEXT_SET(user, stats_user_module, suser);
+	if (mail_stats_connection_connect(suser->stats_conn, user) == 0)
+		suser->stats_connected = TRUE;
+	suser->to_stats_timeout =
+		timeout_add(suser->refresh_secs*1000,
+			    session_stats_refresh_timeout, user);
+	/* fill the initial values. this is necessary for the process-global
+	   values (e.g. getrusage()) if the process is reused for multiple
+	   users. otherwise the next user will start with the previous one's
+	   last values. */
+	mail_user_stats_fill(user, suser->pre_io_stats);
+}
+
+static struct mail_storage_hooks stats_mail_storage_hooks = {
+	.mailbox_allocated = stats_mailbox_allocated,
+	.mail_user_created = stats_user_created
+};
+
+void old_stats_plugin_init(struct module *module)
+{
+	mail_stats_item = stats_register(&mail_stats_vfuncs);
+	mail_storage_hooks_add(module, &stats_mail_storage_hooks);
+}
+
+void old_stats_plugin_preinit(void)
+{
+	mail_stats_global_preinit();
+}
+
+void old_stats_plugin_deinit(void)
+{
+	if (global_stats_conn != NULL)
+		stats_connection_unref(&global_stats_conn);
+	mail_stats_fill_global_deinit();
+	mail_storage_hooks_remove(&stats_mail_storage_hooks);
+	stats_unregister(&mail_stats_item);
+}
diff --git a/src/plugins/old-stats/stats-plugin.h b/src/plugins/old-stats/stats-plugin.h
new file mode 100644
index 0000000..dedcfbd
--- /dev/null
+++ b/src/plugins/old-stats/stats-plugin.h
@@ -0,0 +1,60 @@
+#ifndef STATS_PLUGIN_H
+#define STATS_PLUGIN_H
+
+#include "module-context.h"
+#include "mail-user.h"
+#include "mail-storage-private.h"
+
+#define STATS_USER_CONTEXT(obj) \
+	MODULE_CONTEXT(obj, stats_user_module)
+
+#define STATS_USER_CONTEXT_REQUIRE(obj) \
+	MODULE_CONTEXT_REQUIRE(obj, stats_user_module)
+
+struct stats_user {
+	union mail_user_module_context module_ctx;
+
+	struct ioloop_context *ioloop_ctx;
+	struct stats_connection *stats_conn;
+	const char *stats_session_id;
+	bool stats_connected;
+
+	unsigned int refresh_secs;
+	bool track_commands;
+	unsigned int refresh_check_counter;
+
+	/* current session statistics */
+	struct stats *session_stats;
+	/* cumulative trans_stats for all already freed transactions. */
+	struct mailbox_transaction_stats finished_transaction_stats;
+	/* stats before calling IO callback. after IO callback this value is
+	   compared to current stats to see the difference */
+	struct stats *pre_io_stats;
+
+	time_t last_session_update;
+	struct timeout *to_stats_timeout;
+	/* stats that were last sent to stats server */
+	struct stats *last_sent_session_stats;
+	bool session_sent_duplicate;
+
+	/* list of all currently existing transactions for this user */
+	struct stats_transaction_context *transactions;
+};
+
+struct stats_transaction_context {
+	union mailbox_transaction_module_context module_ctx;
+
+	struct stats_transaction_context *prev, *next;
+	struct mailbox_transaction_context *trans;
+
+	struct mailbox_transaction_stats prev_stats;
+};
+
+extern MODULE_CONTEXT_DEFINE(stats_user_module, &mail_user_module_register);
+extern MODULE_CONTEXT_DEFINE(stats_storage_module, &mail_storage_module_register);
+
+void old_stats_plugin_init(struct module *module);
+void old_stats_plugin_preinit(void);
+void old_stats_plugin_deinit(void);
+
+#endif