From 88156715536924293fb3a8b610566369324e69db Mon Sep 17 00:00:00 2001
From: Mike Christie <mchristi@redhat.com>
Date: Tue, 4 Jun 2019 23:42:40 -0500
Subject: [PATCH] cmake and build: add netlink lib requirement detection

The next patch adds netlink support to rbd-nbd. This patch just adds the
build related changes to bring in the netlink lib and test and build
against it.

Signed-off-by: Mike Christie <mchristi@redhat.com>
---
 CMakeLists.txt                   |  7 +++++++
 ceph.spec.in                     |  1 +
 cmake/modules/Findgenl.cmake     | 23 +++++++++++++++++++++++
 debian/control                   |  2 ++
 src/tools/rbd_nbd/CMakeLists.txt |  3 ++-
 5 files changed, 35 insertions(+), 1 deletion(-)
 create mode 100644 cmake/modules/Findgenl.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7a95e82009c..050dfe059b4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -218,15 +218,22 @@ if(LINUX)
   set(HAVE_UDEV ${UDEV_FOUND})
   find_package(blkid REQUIRED)
   set(HAVE_BLKID ${BLKID_FOUND})
+  if(WITH_RBD)
+    find_package(genl REQUIRED)
+    set(HAVE_GENL $GENL_FOUND)
+  endif()
 elseif(FREEBSD)
   set(HAVE_UDEV OFF)
   set(HAVE_LIBAIO OFF)
   set(HAVE_BLKID OFF)
+  set(HAVE_GENL OFF)
 else()
   set(HAVE_UDEV OFF)
   message(STATUS "Not using udev")
   set(HAVE_BLKID OFF)
   message(STATUS "Not using BLKID")
+  set(HAVE_GENL OFF)
+  message(STATUS "Not using GENL")
 endif(LINUX)
 
 option(WITH_OPENLDAP "OPENLDAP is here" ON)
diff --git a/ceph.spec.in b/ceph.spec.in
index 708d81fd676..c5d484d721c 100644
--- a/ceph.spec.in
+++ b/ceph.spec.in
@@ -169,6 +169,7 @@ BuildRequires:	libaio-devel
 BuildRequires:	libblkid-devel >= 2.17
 BuildRequires:	libcurl-devel
 BuildRequires:	libudev-devel
+BuildRequires:	libnl3-devel
 BuildRequires:	liboath-devel
 BuildRequires:	libtool
 BuildRequires:	libxml2-devel
diff --git a/cmake/modules/Findgenl.cmake b/cmake/modules/Findgenl.cmake
new file mode 100644
index 00000000000..07c5f357bdb
--- /dev/null
+++ b/cmake/modules/Findgenl.cmake
@@ -0,0 +1,23 @@
+# - Find libnl-genl3
+# Find the genl library and includes
+#
+# GENL_INCLUDE_DIR - where to find netlink.h, etc.
+# GENL_LIBRARIES - List of libraries when using genl.
+# GENL_FOUND - True if genl found.
+
+find_path(GENL_INCLUDE_DIR NAMES netlink/netlink.h PATH_SUFFIXES libnl3)
+
+find_library(LIBNL_LIB nl-3)
+find_library(LIBNL_GENL_LIB nl-genl-3)
+set(GENL_LIBRARIES
+  ${LIBNL_LIB}
+  ${LIBNL_GENL_LIB}
+  )
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(nl-genl-3
+  DEFAULT_MSG GENL_LIBRARIES GENL_INCLUDE_DIR)
+
+mark_as_advanced(
+  GENL_LIBRARIES
+  GENL_INCLUDE_DIR)
diff --git a/debian/control b/debian/control
index 2bb5e6fbb90..de2a88565fa 100644
--- a/debian/control
+++ b/debian/control
@@ -45,6 +45,8 @@ Build-Depends: cmake (>= 3.5),
                libssl-dev,
                libtool,
                libudev-dev,
+               libnl-3-dev,
+               libnl-genl-3-dev,
                libxml2-dev,
                librabbitmq-dev,
                lsb-release,
diff --git a/src/tools/rbd_nbd/CMakeLists.txt b/src/tools/rbd_nbd/CMakeLists.txt
index d7ce811e963..5356fae4f9b 100644
--- a/src/tools/rbd_nbd/CMakeLists.txt
+++ b/src/tools/rbd_nbd/CMakeLists.txt
@@ -1,3 +1,4 @@
 add_executable(rbd-nbd rbd-nbd.cc)
-target_link_libraries(rbd-nbd librbd librados global)
+target_include_directories(rbd-nbd PUBLIC ${GENL_INCLUDE_DIR})
+target_link_libraries(rbd-nbd librbd librados global ${GENL_LIBRARIES})
 install(TARGETS rbd-nbd DESTINATION bin)
-- 
2.39.5