diff --git a/.gitignore b/.gitignore
index 8dd2450..e047d9b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@
 /rdma-core-16.2.tar.gz
 /rdma-core-20.1.tar.gz
 /rdma-core-26.1.tar.gz
+/rdma-core-27.0.tar.gz
diff --git a/rdma-core.spec b/rdma-core.spec
index 182345b..a3003ab 100644
--- a/rdma-core.spec
+++ b/rdma-core.spec
@@ -1,5 +1,5 @@
 Name: rdma-core
-Version: 26.1
+Version: 27.0
 Release: 1%{?dist}
 Summary: RDMA core userspace libraries and daemons
 
@@ -29,13 +29,13 @@ BuildRequires: systemd-devel
 BuildRequires: python3-devel
 BuildRequires: python3-Cython
 %else
-%if 0%{?rhel} == 8 || 0%{?fedora} >= 30
+%if 0%{?rhel} >= 8 || 0%{?fedora} >= 30
 BuildRequires: python3
 %else
 BuildRequires: python
 %endif
 %endif
-%if 0%{?fedora} >= 21
+%if 0%{?fedora} >= 21 || 0%{?rhel} >= 8
 BuildRequires: perl-generators
 %endif
 
@@ -50,7 +50,7 @@ ExcludeArch: %{arm}
 
 # Since we recommend developers use Ninja, so should packagers, for consistency.
 %define CMAKE_FLAGS %{nil}
-%if 0%{?fedora} >= 23
+%if 0%{?fedora} >= 23 || 0%{?rhel} >= 8
 # Ninja was introduced in FC23
 BuildRequires: ninja-build
 %define CMAKE_FLAGS -GNinja
@@ -63,8 +63,8 @@ BuildRequires: make
 %define cmake_install DESTDIR=%{buildroot} make install
 %endif
 
-%if 0%{?fedora} >= 25
-# pandoc was introduced in FC25
+%if 0%{?fedora} >= 25 || 0%{?rhel} >= 8
+# pandoc was introduced in FC25, Centos8
 BuildRequires: pandoc
 %endif
 
@@ -106,6 +106,7 @@ RDMA core development libraries and headers.
 
 %package -n infiniband-diags
 Summary: InfiniBand Diagnostic Tools
+Requires: libibumad = %{version}-%{release}
 Provides: perl(IBswcountlimits)
 Provides: libibmad = %{version}-%{release}
 Obsoletes: libibmad < %{version}-%{release}
@@ -129,8 +130,6 @@ compatibility reasons.
 Summary: A library and drivers for direct userspace use of RDMA (InfiniBand/iWARP/RoCE) hardware
 %{?systemd_requires}
 Requires: %{name}%{?_isa} = %{version}-%{release}
-Provides: libcxgb3 = %{version}-%{release}
-Obsoletes: libcxgb3 < %{version}-%{release}
 Provides: libcxgb4 = %{version}-%{release}
 Obsoletes: libcxgb4 < %{version}-%{release}
 Provides: libefa = %{version}-%{release}
@@ -147,8 +146,6 @@ Provides: libmlx5 = %{version}-%{release}
 Obsoletes: libmlx5 < %{version}-%{release}
 Provides: libmthca = %{version}-%{release}
 Obsoletes: libmthca < %{version}-%{release}
-Provides: libnes = %{version}-%{release}
-Obsoletes: libnes < %{version}-%{release}
 Provides: libocrdma = %{version}-%{release}
 Obsoletes: libocrdma < %{version}-%{release}
 Provides: librxe = %{version}-%{release}
@@ -163,7 +160,6 @@ fast path operations.
 
 Device-specific plug-in ibverbs userspace drivers are included:
 
-- libcxgb3: Chelsio T3 iWARP HCA
 - libcxgb4: Chelsio T4 iWARP HCA
 - libefa: Amazon Elastic Fabric Adapter
 - libhfi1: Intel Omni-Path HFI
@@ -173,7 +169,6 @@ Device-specific plug-in ibverbs userspace drivers are included:
 - libmlx4: Mellanox ConnectX-3 InfiniBand HCA
 - libmlx5: Mellanox Connect-IB/X-4+ InfiniBand HCA
 - libmthca: Mellanox InfiniBand HCA
-- libnes: NetEffect RNIC
 - libocrdma: Emulex OneConnect RDMA/RoCE Device
 - libqedr: QLogic QL4xxx RoCE HCA
 - librxe: A software implementation of the RoCE protocol
@@ -343,6 +338,11 @@ rm -f %{buildroot}/%{_sbindir}/srp_daemon.sh
 
 %ldconfig_scriptlets -n librdmacm
 
+%post -n rdma-core
+/sbin/udevadm trigger --subsystem-match=infiniband --action=change || true
+/sbin/udevadm trigger --subsystem-match=net --action=change || true
+/sbin/udevadm trigger --subsystem-match=infiniband_mad --action=change || true
+
 %post -n ibacm
 %systemd_post ibacm.service
 %preun -n ibacm
@@ -636,9 +636,13 @@ rm -f %{buildroot}/%{_sbindir}/srp_daemon.sh
 %if %{with_pyverbs}
 %files -n python3-pyverbs
 %{python3_sitearch}/pyverbs
+%{_docdir}/%{name}-%{version}/tests/*.py
 %endif
 
 %changelog
+* Thu Dec 12 2019 Honggang Li <honli@redhat.com> - 27.0-1
+- Rebase to upstream release v27.0
+
 * Thu Nov 28 2019 Honggang Li <honli@redhat.com> - 26.1-1
 - Rebase to upstream release v26.1
 
diff --git a/sources b/sources
index 371d477..75ea72b 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (rdma-core-26.1.tar.gz) = 872c5fade0b184c17f740e8db566972e711fb4d51d74eb4a11bbaf685ad2fd455d97feb595f892a9436b839b594983d9364dcc981ca89651e9f0a178d9b0a901
+SHA512 (rdma-core-27.0.tar.gz) = cf529867fbbd65562047d3e5b21d1f1c37835ad478b1209ac4bc9533d09834c0c9683ea9658b0ea5c794821419216d901f043e74e3c83494627e3a55ef849405