eBPF library support for SONiC applications

dockers/docker-base-stretch/Dockerfile.j2

@@ -111,6 +111,9 @@ RUN apt-get -y purge   \
 {{ install_debian_packages(docker_base_stretch_debs.split(' ')) }}
 {%- endif %}
 
+# Base packages for bpf
+RUN apt-get install -f -y libbpf-dev libelf-dev
+
 # Clean up apt
 # Remove /var/lib/apt/lists/*, could be obsoleted for derived images
 RUN apt-get clean -y                     && \

files/build_templates/docker_image_ctl.j2

@@ -390,6 +390,8 @@ start() {
 {%- if sonic_asic_platform != "mellanox" %}
         --tmpfs /tmp \
 {%- endif %}
+        -v /sys/kernel/debug:/sys/kernel/debug \
+        --ulimit memlock=67108864:67108864 \
         --tmpfs /var/tmp \
         --env "NAMESPACE_ID"="$DEV" \
         --env "NAMESPACE_PREFIX"="$NAMESPACE_PREFIX" \

rules/libebpf.dep

@@ -0,0 +1,10 @@
+
+SPATH       := $($(LIBEBPF)_SRC_PATH)
+DEP_FILES   := $(SONIC_COMMON_FILES_LIST) rules/libebpf.mk rules/libebpf.dep   
+DEP_FILES   += $(SONIC_COMMON_BASE_FILES_LIST)
+DEP_FILES   += $(shell git ls-files $(SPATH))
+
+$(LIBEBPF)_CACHE_MODE  := GIT_CONTENT_SHA 
+$(LIBEBPF)_DEP_FLAGS   := $(SONIC_COMMON_FLAGS_LIST)
+$(LIBEBPF)_DEP_FILES   := $(DEP_FILES)
+

rules/libebpf.mk

@@ -0,0 +1,13 @@
+# BPF package
+BPF_VERSION := 1.0.0
+LIBEBPF = libebpf_$(BPF_VERSION)_$(CONFIGURED_ARCH).deb
+$(LIBEBPF)_SRC_PATH = $(SRC_PATH)/libebpf
+$(LIBEBPF)_DEPENDS += $(LINUX_HEADERS) $(LINUX_COMMON_HEADERS)
+SONIC_MAKE_DEBS += $(LIBEBPF)
+
+LIBEBPF_DBG = libebpf-dbgsym_$(BPF_VERSION)_$(CONFIGURED_ARCH).deb
+$(LIBEBPF_DBG)_DEPENDS += $(LIBEBPF)
+$(eval $(call add_derived_package,$(LIBEBPF),$(LIBEBPF_DBG)))
+
+export LIBEBPF LIBEBPF_DBG BPF_VERSION
+

sonic-slave-stretch/Dockerfile.j2

@@ -291,6 +291,11 @@ RUN apt-get update && apt-get install -y \
 # For iptables
         libnetfilter-conntrack-dev \
         libnftnl-dev \
+# eBPF tools		
+        clang-6.0 \
+        llvm-6.0 \
+        libbpf-dev \
+        libelf-dev \
 # For SAI3.7
         protobuf-compiler \
         libprotobuf-dev \

src/libebpf/Makefile

@@ -0,0 +1,14 @@
+SHELL = /bin/bash
+.ONESHELL:
+.SHELLFLAGS += -e
+
+MAIN_TARGET := libebpf_$(EBPF_VERSION)_$(CONFIGURED_ARCH).deb
+
+$(addprefix $(DEST)/, $(MAIN_TARGET)): $(DEST)/% :
+
+	pushd src
+	[ ! -f ./autogen.sh ] || ./autogen.sh 
+	dpkg-buildpackage -us -uc -b -j$(SONIC_CONFIG_MAKE_JOBS)
+	popd
+
+	mv $(LIBEBPF_DBG) $* $(DEST)/

src/libebpf/src/Makefile.am

@@ -0,0 +1,3 @@
+ACLOCAL_AMFLAGS = -I m4
+
+SUBDIRS = libutil samples/ebpf-kern-mod  samples/ebpf-user-mod

src/libebpf/src/autogen.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+libtoolize --force --copy &&
+autoreconf --force --install -I m4
+rm -Rf autom4te.cache
+