Add first prototype for object storage device abstraction.

For this we use libdroplet from scality.

autoconf/configure.in

@@ -3446,6 +3446,65 @@ fi
 AC_SUBST(GLUSTER_INC)
 AC_SUBST(GLUSTER_LIBS)
 
+dnl
+dnl Check for Object storage via libdroplet.
+dnl
+DROPLET_LIBS="-ldroplet"
+DROPLET_INC=""
+have_droplet=no
+AC_ARG_WITH(droplet,
+   AC_HELP_STRING([--with-droplet@<:@=DIR@:>@], [Directory holding DROPLET includes/libs]),
+      with_droplet_directory=$withval
+)
+
+if test "x${with_droplet_directory}" != "xyes" && test x"${with_droplet_directory}" != "x"; then
+   #
+   # Make sure the $with_droplet_directory also makes sense
+   #
+   if test -d "${with_droplet_directory}/lib" -a -d "${with_droplet_directory}/include"; then
+      DROPLET_LIBS="-L${with_droplet_directory}/lib ${DROPLET_LIBS}"
+      DROPLET_INC="-I${with_droplet_directory}/include ${DROPLET_INC}"
+   fi
+fi
+
+saved_LIBS="${LIBS}"
+saved_CFLAGS="${CFLAGS}"
+saved_CPPFLAGS="${CPPFLAGS}"
+LIBS="${saved_LIBS} ${DROPLET_LIBS}"
+CFLAGS="${saved_CFLAGS} ${DROPLET_INC}"
+CPPFLAGS="${saved_CPPFLAGS} ${DROPLET_INC}"
+
+AC_CHECK_HEADER(droplet.h)
+
+AC_MSG_CHECKING(for dpl_ctx_new in libdroplet library)
+AC_TRY_LINK(
+   [
+       #include <droplet.h>
+   ], [
+       dpl_ctx_new(NULL, NULL);
+   ], [
+       AC_MSG_RESULT(yes)
+       have_droplet="yes"
+   ], [
+       AC_MSG_RESULT(no)
+       have_droplet="no"
+   ]
+)
+
+LIBS="${saved_LIBS}"
+CFLAGS="${saved_CFLAGS}"
+CPPFLAGS="${saved_CPPFLAGS}"
+
+if test "x${have_droplet}" = "xyes"; then
+   AC_DEFINE(HAVE_OBJECTSTORE, 1, [Define to 1 if you have libdroplet lib])
+else
+   DROPLET_LIBS=""
+   DROPLET_INC=""
+fi
+
+AC_SUBST(DROPLET_INC)
+AC_SUBST(DROPLET_LIBS)
+
 dnl
 dnl Check for pthread libraries
 dnl
@@ -4042,6 +4101,7 @@ Configuration on `date`:
    XATTR support:           ${have_xattr}
    SCSI Crypto support:     ${have_scsi_crypto}
    GLUSTERFS support:       ${have_glusterfs}
+   DROPLET support:         ${have_droplet}
    Python support:          ${support_python} ${PYTHON_LIBS}
    systemd support:         ${support_systemd} ${SYSTEMD_UNITDIR}
    Batch insert enabled:    ${batch_insert_db_backends}

src/stored/Makefile.in

@@ -28,6 +28,7 @@ first_rule: all
 dummy:
 
 DEVICE_API_SRCS = gfapi_device.c \
+		  object_store_device.c \
 		  unix_file_device.c \
 		  unix_tape_device.c \
 		  vtape.c
@@ -82,7 +83,9 @@ BEXTRACT_LIBS += @LZO_LIBS_NONSHARED@
 BEXTRACT_LIBS += @FASTLZ_LIBS_NONSHARED@
 
 GLUSTER_INC = @GLUSTER_INC@
+DROPLET_INC = @DROPLET_INC@
 LIBS += @GLUSTER_LIBS@
+LIBS += @DROPLET_LIBS@
 INCLUDES += -I$(srcdir) -I$(basedir) -I$(basedir)/include
 
 DEBUG = @DEBUG@
@@ -104,12 +107,16 @@ NDMP_LIBS = @NDMP_LIBS@
 
 dev.o: dev.c
 	@echo "Compiling $<"
-	$(NO_ECHO)$(CXX) $(DEFS) $(DEBUG) $(GLUSTER_INC) -c $(WCFLAGS) $(CPPFLAGS) $(INCLUDES) $(DINCLUDE) $(CXXFLAGS) $<
+	$(NO_ECHO)$(CXX) $(DEFS) $(DEBUG) $(GLUSTER_INC) $(DROPLET_INC) -c $(WCFLAGS) $(CPPFLAGS) $(INCLUDES) $(DINCLUDE) $(CXXFLAGS) $<
 
 gfapi_device.o: gfapi_device.c
 	@echo "Compiling $<"
 	$(NO_ECHO)$(CXX) $(DEFS) $(DEBUG) $(GLUSTER_INC) -c $(WCFLAGS) $(CPPFLAGS) $(INCLUDES) $(DINCLUDE) $(CXXFLAGS) $<
 
+object_storage_device.o: object_storage_device.c
+	@echo "Compiling $<"
+	$(NO_ECHO)$(CXX) $(DEFS) $(DEBUG) $(DROPLET_INC) -c $(WCFLAGS) $(CPPFLAGS) $(INCLUDES) $(DINCLUDE) $(CXXFLAGS) $<
+
 all: Makefile bareos-sd @STATIC_SD@ bls bextract bscan btape bcopy
 	@echo "===== Make of stored is good ===="
 	@echo " "