nbd-proxy: add configuration via netlink to support kinds of timeouts.

PR #58 - https://github.com/vitalif/vitastor/pull/58/commits

By MIND Software LLC

By submitting this pull request, I accept Vitastor CLA

src/CMakeLists.txt

@@ -4,6 +4,9 @@ project(vitastor)
 
 include(GNUInstallDirs)
 include(CTest)
+include(CheckIncludeFile)
+
+find_package(PkgConfig)
 
 set(WITH_QEMU false CACHE BOOL "Build QEMU driver inside Vitastor source tree")
 set(WITH_FIO true CACHE BOOL "Build FIO driver")
@@ -43,6 +46,8 @@ macro(install_symlink filepath sympath)
 	install(CODE "message(\"-- Created symlink: ${sympath} -> ${filepath}\")")
 endmacro(install_symlink)
 
+check_include_file("linux/nbd-netlink.h" HAVE_NBD_NETLINK_H)
+
 find_package(PkgConfig)
 pkg_check_modules(LIBURING REQUIRED liburing)
 if (${WITH_QEMU})
@@ -178,12 +183,15 @@ if (${WITH_FIO})
 endif (${WITH_FIO})
 
 # vitastor-nbd
-add_executable(vitastor-nbd
-	nbd_proxy.cpp
-)
-target_link_libraries(vitastor-nbd
-	vitastor_client
+pkg_check_modules(NL3 REQUIRED libnl-3.0 libnl-genl-3.0)
+add_executable(vitastor-nbd   
+	nbd_proxy.cpp 
 )
+target_include_directories(vitastor-nbd PUBLIC ${NL3_INCLUDE_DIRS})
+target_link_libraries(vitastor-nbd vitastor_client ${NL3_LIBRARIES})
+if(HAVE_NBD_NETLINK_H)
+	target_compile_definitions(vitastor-nbd PUBLIC HAVE_NBD_NETLINK_H)
+endif()
 
 # libvitastor_kv.so
 add_library(vitastor_kv SHARED