diff --git a/.gitignore b/.gitignore
index bd6ba1c..77c1910 100644
--- a/.gitignore
+++ b/.gitignore
@@ -93,3 +93,5 @@ cscope.*
 tags
 TAGS
 *~
+tests/check-libqblock-qcow2
+tests/test_images
diff --git a/Makefile b/Makefile
index b04d862..dd01fe7 100644
--- a/Makefile
+++ b/Makefile
@@ -195,6 +195,27 @@ qemu-img$(EXESUF): qemu-img.o $(tools-obj-y) $(block-obj-y) libqemustub.a
 qemu-nbd$(EXESUF): qemu-nbd.o $(tools-obj-y) $(block-obj-y) libqemustub.a
 qemu-io$(EXESUF): qemu-io.o cmd.o $(tools-obj-y) $(block-obj-y) libqemustub.a
 
+######################################################################
+# Support building shared library libqblock
+.PHONY: install-libqblock subdir-libqblock
+
+ifeq ($(CONFIG_LIBQBLOCK), y)
+subdir-libqblock: $(GENERATED_HEADERS) $(GENERATED_SOURCES)
+	$(call quiet-command,$(MAKE) $(SUBDIR_MAKEFLAGS) -C libqblock V="$(V)" TARGET_DIR="$*/" all,)
+
+install-libqblock: subdir-libqblock
+	$(call quiet-command,$(MAKE) $(SUBDIR_MAKEFLAGS) -C libqblock V="$(V)" TARGET_DIR="$*/" install-libqblock,)
+else
+LIBQBLOCK_WARN = "Libqblock was not enabled, skip. Make sure libtool was installed and libqblock was enabled."
+subdir-libqblock: $(GENERATED_HEADERS) $(GENERATED_SOURCES)
+	@echo $(LIBQBLOCK_WARN)
+
+install-libqblock:
+	@echo $(LIBQBLOCK_WARN)
+endif
+
+###########################################################################
+
 qemu-bridge-helper$(EXESUF): qemu-bridge-helper.o
 
 vscclient$(EXESUF): $(libcacard-y) $(oslib-obj-y) $(trace-obj-y) libcacard/vscclient.o libqemustub.a
@@ -258,7 +279,7 @@ clean:
 	rm -rf qapi-generated
 	rm -rf qga/qapi-generated
 	$(MAKE) check-clean
-	for d in $(ALL_SUBDIRS) $(QEMULIBS) libcacard; do \
+	for d in $(ALL_SUBDIRS) $(QEMULIBS) libcacard libqblock; do \
 	if test -d $$d; then $(MAKE) -C $$d $@ || exit 1; fi; \
 	rm -f $$d/qemu-options.def; \
         done
@@ -331,7 +352,7 @@ install-confdir:
 install-sysconfig: install-datadir install-confdir
 	$(INSTALL_DATA) $(SRC_PATH)/sysconfigs/target/target-x86_64.conf "$(DESTDIR)$(qemu_confdir)"
 
-install: all $(if $(BUILD_DOCS),install-doc) install-sysconfig install-datadir
+install: all $(if $(BUILD_DOCS),install-doc) install-sysconfig install-datadir $(if $(CONFIG_LIBQBLOCK),install-libqblock)
 	$(INSTALL_DIR) "$(DESTDIR)$(bindir)"
 ifneq ($(TOOLS),)
 	$(INSTALL_PROG) $(STRIP_OPT) $(TOOLS) "$(DESTDIR)$(bindir)"
diff --git a/configure b/configure
index 801585c..b0bf912 100755
--- a/configure
+++ b/configure
@@ -223,6 +223,7 @@ libiscsi=""
 coroutine=""
 seccomp=""
 glusterfs=""
+libqblock=""
 
 # parse CC options first
 for opt do
@@ -871,6 +872,10 @@ for opt do
   ;;
   --enable-glusterfs) glusterfs="yes"
   ;;
+  --disable-libqblock) libqblock="no"
+  ;;
+  --enable-libqblock) libqblock="yes"
+  ;;
   *) echo "ERROR: unknown option $opt"; show_help="yes"
   ;;
   esac
@@ -1119,6 +1124,8 @@ echo "  --with-coroutine=BACKEND coroutine backend. Supported options:"
 echo "                           gthread, ucontext, sigaltstack, windows"
 echo "  --enable-glusterfs       enable GlusterFS backend"
 echo "  --disable-glusterfs      disable GlusterFS backend"
+echo "  --enable-libqblock       enable dynamic library libqblock"
+echo "  --disable-libqblock      disable dynamic library libqblock"
 echo ""
 echo "NOTE: The object files are built at the place where configure is launched"
 exit 1
@@ -2349,6 +2356,28 @@ EOF
   fi
 fi
 
+##########################################
+# libqblock probe
+if test "$libqblock" == "yes" ; then
+    # if it is set to yes by user, check whether libtool exist
+    if ! has $libtool; then
+        echo
+        echo "ERROR: Libqblock needs libtool, but libtool was not found."
+        echo "Make sure libtool was installed, or disable libqblock."
+        echo
+        exit 1
+    fi
+fi
+
+if test "$libqblock" == "" ; then
+    # libqblock depends on libtool, default to yes if libtool exist
+    if ! has $libtool; then
+        libqblock="no"
+    else
+        libqblock="yes"
+    fi
+fi
+
 #
 # Check for xxxat() functions when we are building linux-user
 # emulator.  This is done because older glibc versions don't
@@ -3101,6 +3130,9 @@ if test "$want_tools" = "yes" ; then
   if [ "$linux" = "yes" -o "$bsd" = "yes" -o "$solaris" = "yes" ] ; then
     tools="qemu-nbd\$(EXESUF) $tools"
   fi
+  if test "$libqblock" = "yes" ; then
+  tools="subdir-libqblock $tools"
+  fi
 fi
 if test "$softmmu" = yes ; then
   if test "$virtfs" != no ; then
@@ -3235,6 +3267,7 @@ echo "build guest agent $guest_agent"
 echo "seccomp support   $seccomp"
 echo "coroutine backend $coroutine_backend"
 echo "GlusterFS support $glusterfs"
+echo "libqblock support $libqblock"
 
 if test "$sdl_too_old" = "yes"; then
 echo "-> Your SDL version is too old - please upgrade to have SDL support"
@@ -3581,6 +3614,10 @@ if test "$glusterfs" = "yes" ; then
   echo "CONFIG_GLUSTERFS=y" >> $config_host_mak
 fi
 
+if test "$libqblock" = "yes" ; then
+  echo "CONFIG_LIBQBLOCK=y" >> $config_host_mak
+fi
+
 # USB host support
 case "$usb" in
 linux)
@@ -4166,12 +4203,14 @@ DIRS="$DIRS pc-bios/optionrom pc-bios/spapr-rtas"
 DIRS="$DIRS roms/seabios roms/vgabios"
 DIRS="$DIRS qapi-generated"
 DIRS="$DIRS libcacard libcacard/libcacard libcacard/trace"
+DIRS="$DIRS libqblock"
 FILES="Makefile tests/Makefile tests/tcg/Makefile qdict-test-data.txt"
 FILES="$FILES tests/tcg/cris/Makefile tests/tcg/cris/.gdbinit"
 FILES="$FILES tests/tcg/lm32/Makefile libcacard/Makefile"
 FILES="$FILES pc-bios/optionrom/Makefile pc-bios/keymaps"
 FILES="$FILES pc-bios/spapr-rtas/Makefile"
 FILES="$FILES roms/seabios/Makefile roms/vgabios/Makefile"
+FILES="$FILES libqblock/Makefile"
 for bios_file in \
     $source_path/pc-bios/*.bin \
     $source_path/pc-bios/*.rom \
diff --git a/libqblock/Makefile b/libqblock/Makefile
new file mode 100644
index 0000000..13f9522
--- /dev/null
+++ b/libqblock/Makefile
@@ -0,0 +1,69 @@
+###########################################################################
+# libqblock Makefile
+##########################################################################
+-include ../config-host.mak
+-include $(SRC_PATH)/rules.mak
+-include $(SRC_PATH)/Makefile.objs
+
+#############################################################################
+# Library settings
+#############################################################################
+# src files are in orignial path
+$(call set-vpath, $(SRC_PATH))
+# generated files are in ../
+$(call set-vpath, ../)
+
+#library objects
+libqblock-obj-y= libqblock/libqblock.o libqblock/libqblock-error.o libqblock/libqblock-aio.o
+
+extra-obj-y= qemu-timer.o qemu-tool.o
+
+QEMU_OBJS= $(libqblock-obj-y) $(block-obj-y) $(oslib-obj-y) $(stub-obj-y) \
+           $(extra-obj-y)
+QEMU_OBJS_LIB= $(patsubst %.o, %.lo, $(QEMU_OBJS))
+
+QEMU_CFLAGS+= -I$(SRC_PATH) -I$(SRC_PATH)/include -I../
+#adding magic macro define for symbol hiding and exposing
+QEMU_CFLAGS+= -fvisibility=hidden -D LIBQB_BUILD
+
+#dependency libraries
+LIBS+= -lz $(LIBS_TOOLS)
+
+#header files to be installed
+libqblock_includedir= $(includedir)/qblock
+libqblock_srcpath= $(SRC_PATH)/libqblock
+libqblock-pub-headers= $(libqblock_srcpath)/libqblock.h \
+                       $(libqblock_srcpath)/libqblock-types.h \
+                       $(libqblock_srcpath)/libqblock-error.h
+
+#################################################################
+# Runtime rules
+#################################################################
+.PHONY: clean all libqblock.la libqblock.pc install-libqblock
+
+clean:
+	rm -f *.lo *.o *.d *.la *.pc
+	rm -rf .libs block trace audio fsdev hw net qapi qga qom slirp ui libqblock stubs backends
+
+all: libqblock.la libqblock.pc
+# Dummy command so that make thinks it has done something
+	@true
+
+libqblock.la: $(QEMU_OBJS_LIB)
+	$(call quiet-command,$(LIBTOOL) --mode=link --quiet --tag=CC $(CC) -rpath $(libdir) -o $@ $^ $(LIBS),"  lt LINK $@")
+
+libqblock.pc: $(libqblock_srcpath)/libqblock.pc.in
+	$(call quiet-command,sed -e 's|@LIBDIR@|$(libdir)|' \
+		-e 's|@INCLUDEDIR@|$(libqblock_includedir)|' \
+	    -e 's|@VERSION@|$(shell cat $(SRC_PATH)/VERSION)|' \
+		-e 's|@PREFIX@|$(prefix)|' \
+		< $(libqblock_srcpath)/libqblock.pc.in > libqblock.pc,\
+	"  GEN   $@")
+
+install-libqblock: libqblock.la libqblock.pc
+	$(INSTALL_DIR) "$(DESTDIR)$(libdir)"
+	$(INSTALL_DIR) "$(DESTDIR)$(libdir)/pkgconfig"
+	$(INSTALL_DIR) "$(DESTDIR)$(libqblock_includedir)"
+	$(LIBTOOL) --mode=install $(INSTALL_DATA) libqblock.la "$(DESTDIR)$(libdir)"
+	$(LIBTOOL) --mode=install $(INSTALL_DATA) libqblock.pc "$(DESTDIR)$(libdir)/pkgconfig"
+	$(LIBTOOL) --mode=install $(INSTALL_DATA) $(libqblock-pub-headers) "$(DESTDIR)$(libqblock_includedir)"
diff --git a/libqblock/libqblock-aio.c b/libqblock/libqblock-aio.c
new file mode 100644
index 0000000..935fb7f
--- /dev/null
+++ b/libqblock/libqblock-aio.c
@@ -0,0 +1,62 @@
+/*
+ * QEMU block layer library
+ *
+ * Copyright IBM, Corp. 2012
+ *
+ * Authors:
+ *  Wenchao Xia   <xiawenc@linux.vnet.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2 or later.
+ * See the COPYING.LIB file in the top-level directory.
+ *
+ */
+
+#include <sys/syscall.h>
+
+#include "qemu-common.h"
+#include "qemu-aio.h"
+#include "main-loop.h"
+#include "compatfd.h"
+
+void qemu_notify_event(void)
+{
+    return;
+}
+
+QEMUBH *qemu_bh_new(QEMUBHFunc *cb, void *opaque)
+{
+    return NULL;
+}
+
+void qemu_aio_flush(void)
+{
+    return;
+}
+
+bool qemu_aio_wait(void)
+{
+    return false;
+}
+
+#ifdef CONFIG_POSIX
+void qemu_aio_set_fd_handler(int fd,
+                             IOHandler *io_read,
+                             IOHandler *io_write,
+                             AioFlushHandler *io_flush,
+                             void *opaque)
+{
+    return;
+}
+#endif
+
+void qemu_aio_set_event_notifier(EventNotifier *notifier,
+                                 EventNotifierHandler *io_read,
+                                 AioFlushEventNotifierHandler *io_flush)
+{
+    return;
+}
+
+bool qemu_signalfd_available(void)
+{
+    return false;
+}
diff --git a/libqblock/libqblock-error.c b/libqblock/libqblock-error.c
new file mode 100644
index 0000000..e69de29
diff --git a/libqblock/libqblock-error.h b/libqblock/libqblock-error.h
new file mode 100644
index 0000000..e69de29
diff --git a/libqblock/libqblock-types.h b/libqblock/libqblock-types.h
new file mode 100644
index 0000000..e69de29
diff --git a/libqblock/libqblock.c b/libqblock/libqblock.c
new file mode 100644
index 0000000..4c18c41
--- /dev/null
+++ b/libqblock/libqblock.c
@@ -0,0 +1,6 @@
+#include "libqblock.h"
+
+int libqb_test(void)
+{
+    return 0;
+}
diff --git a/libqblock/libqblock.h b/libqblock/libqblock.h
new file mode 100644
index 0000000..b0f9daf
--- /dev/null
+++ b/libqblock/libqblock.h
@@ -0,0 +1 @@
+__attribute__((visibility("default"))) int libqb_test(void);
diff --git a/libqblock/libqblock.pc.in b/libqblock/libqblock.pc.in
new file mode 100644
index 0000000..d2a7d06
--- /dev/null
+++ b/libqblock/libqblock.pc.in
@@ -0,0 +1,13 @@
+prefix=@PREFIX@
+exec_prefix=${prefix}
+libdir=@LIBDIR@
+includedir=@INCLUDEDIR@
+
+Name: qblock
+Description: QEMU block layer library
+Version: @VERSION@
+
+Requires:  rt gthread-2.0 glib-2.0 z curl cap-ng uuid
+Libs: -L${libdir} -lqblock
+Libs.private:
+Cflags: -I${includedir}
diff --git a/tests/Makefile b/tests/Makefile
index fc816d0..76de5f4 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -88,6 +88,20 @@ check-qtest-$(CONFIG_POSIX)=$(foreach TARGET,$(TARGETS), $(check-qtest-$(TARGET)
 qtest-obj-y = tests/libqtest.o $(oslib-obj-y) libqemustub.a
 $(check-qtest-y): $(qtest-obj-y)
 
+#libqblock build rules
+check-libqblock-$(CONFIG_LIBQBLOCK) = tests/check-libqblock-qcow2$(EXESUF)
+
+$(check-libqblock-y): QEMU_INCLUDES += -I$(SRC_PATH)/tests -I$(SRC_PATH)/libqblock
+LIBQBLOCK_TEST_DIR = tests/test_images
+LIBQBLOCK_LA = libqblock/libqblock.la
+
+LTLINK = $(call quiet-command, $(LIBTOOL) --mode=link --quiet --tag=CC \
+         $(CC) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) \
+         -o $@ $(sort $(1)) $(LIBS), "lt LINK $(TARGET_DIR)$@")
+
+$(check-libqblock-y): %$(EXESUF): %.o
+	$(call LTLINK, $^ $(LIBQBLOCK_LA))
+
 .PHONY: check-help
 check-help:
 	@echo "Regression testing targets:"
@@ -98,6 +112,7 @@ check-help:
 	@echo " make check-unit           Run qobject tests"
 	@echo " make check-block          Run block tests"
 	@echo " make check-report.html    Generates an HTML test report"
+	@echo " make check-libqblock      Run libqblock tests"
 	@echo " make check-clean          Clean the tests"
 	@echo
 	@echo "Please note that HTML reports do not regenerate if the unit tests"
@@ -130,6 +145,15 @@ $(patsubst %, check-report-qtest-%.xml, $(QTEST_TARGETS)): check-report-qtest-%.
 check-report-unit.xml: $(check-unit-y)
 	$(call quiet-command,gtester -q $(GTESTER_OPTIONS) -o $@ -m=$(SPEED) $^, "GTESTER $@")
 
+# gtester tests with libqblock
+
+# remove quite option to show error if program is terminated by seg fault, otherwise it fails silently.
+GTESTER_OPTIONS_LIBQBLOCK:= -k
+
+.PHONY: $(patsubst %, check-%, $(check-libqblock-y))
+$(patsubst %, check-%, $(check-libqblock-y)): check-%: %
+	$(call quiet-command, LIBQBLOCK_TEST_DIR=$(LIBQBLOCK_TEST_DIR) gtester $(GTESTER_OPTIONS_LIBQBLOCK) -m=$(SPEED) $*,"GTESTER $*")
+
 # Reports and overall runs
 
 check-report.xml: $(patsubst %,check-report-qtest-%.xml, $(QTEST_TARGETS)) check-report-unit.xml
@@ -147,16 +171,19 @@ check-tests/qemu-iotests-quick.sh: tests/qemu-iotests-quick.sh qemu-img$(EXESUF)
 
 # Consolidated targets
 
-.PHONY: check-qtest check-unit check
+.PHONY: check-qtest check-unit check check-libqblock check-clean
 check-qtest: $(patsubst %,check-qtest-%, $(QTEST_TARGETS))
 check-unit: $(patsubst %,check-%, $(check-unit-y))
 check-block: $(patsubst %,check-%, $(check-block-y))
-check: check-unit check-qtest
+check-libqblock: $(patsubst %,check-%, $(check-libqblock-y))
+check: check-libqblock check-unit check-qtest
 
 check-clean:
 	$(MAKE) -C tests/tcg clean
 	rm -f $(check-unit-y)
 	rm -f $(check-qtest-i386-y) $(check-qtest-x86_64-y) $(check-qtest-sparc64-y) $(check-qtest-sparc-y)
 	rm -f tests/*.o
+	rm -f $(check-libqblock-y)
+	rm -rf $(LIBQBLOCK_TEST_DIR)
 
 -include $(wildcard tests/*.d)
diff --git a/tests/check-libqblock-qcow2.c b/tests/check-libqblock-qcow2.c
new file mode 100644
index 0000000..50a4df3
--- /dev/null
+++ b/tests/check-libqblock-qcow2.c
@@ -0,0 +1,6 @@
+#include "libqblock.h"
+int main(int argc, char **argv)
+{
+    libqb_test();
+    return 0;
+}