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Makefile
Makefile
 
 
README.rst
README.rst
 
 
bpf_load.c
bpf_load.c
 
 
bpf_load.h
bpf_load.h
 
 
cgroup_helpers.c
cgroup_helpers.c
 
 
cgroup_helpers.h
cgroup_helpers.h
 
 
cookie_uid_helper_example.c
cookie_uid_helper_example.c
 
 
fds_example.c
fds_example.c
 
 
lathist_kern.c
lathist_kern.c
 
 
lathist_user.c
lathist_user.c
 
 
libbpf.h
libbpf.h
 
 
load_sock_ops.c
load_sock_ops.c
 
 
lwt_len_hist.sh
lwt_len_hist.sh
 
 
lwt_len_hist_kern.c
lwt_len_hist_kern.c
 
 
lwt_len_hist_user.c
lwt_len_hist_user.c
 
 
map_perf_test_kern.c
map_perf_test_kern.c
 
 
map_perf_test_user.c
map_perf_test_user.c
 
 
offwaketime_kern.c
offwaketime_kern.c
 
 
offwaketime_user.c
offwaketime_user.c
 
 
parse_ldabs.c
parse_ldabs.c
 
 
parse_simple.c
parse_simple.c
 
 
parse_varlen.c
parse_varlen.c
 
 
run_cookie_uid_helper_example.sh
run_cookie_uid_helper_example.sh
 
 
sampleip_kern.c
sampleip_kern.c
 
 
sampleip_user.c
sampleip_user.c
 
 
sock_example.c
sock_example.c
 
 
sock_example.h
sock_example.h
 
 
sock_flags_kern.c
sock_flags_kern.c
 
 
sockex1_kern.c
sockex1_kern.c
 
 
sockex1_user.c
sockex1_user.c
 
 
sockex2_kern.c
sockex2_kern.c
 
 
sockex2_user.c
sockex2_user.c
 
 
sockex3_kern.c
sockex3_kern.c
 
 
sockex3_user.c
sockex3_user.c
 
 
spintest_kern.c
spintest_kern.c
 
 
spintest_user.c
spintest_user.c
 
 
syscall_nrs.c
syscall_nrs.c
 
 
syscall_tp_kern.c
syscall_tp_kern.c
 
 
syscall_tp_user.c
syscall_tp_user.c
 
 
tc_l2_redirect.sh
tc_l2_redirect.sh
 
 
tc_l2_redirect_kern.c
tc_l2_redirect_kern.c
 
 
tc_l2_redirect_user.c
tc_l2_redirect_user.c
 
 
tcbpf1_kern.c
tcbpf1_kern.c
 
 
tcbpf2_kern.c
tcbpf2_kern.c
 
 
tcp_bufs_kern.c
tcp_bufs_kern.c
 
 
tcp_clamp_kern.c
tcp_clamp_kern.c
 
 
tcp_cong_kern.c
tcp_cong_kern.c
 
 
tcp_iw_kern.c
tcp_iw_kern.c
 
 
tcp_rwnd_kern.c
tcp_rwnd_kern.c
 
 
tcp_synrto_kern.c
tcp_synrto_kern.c
 
 
test_cgrp2_array_pin.c
test_cgrp2_array_pin.c
 
 
test_cgrp2_attach.c
test_cgrp2_attach.c
 
 
test_cgrp2_attach2.c
test_cgrp2_attach2.c
 
 
test_cgrp2_sock.c
test_cgrp2_sock.c
 
 
test_cgrp2_sock.sh
test_cgrp2_sock.sh
 
 
test_cgrp2_sock2.c
test_cgrp2_sock2.c
 
 
test_cgrp2_sock2.sh
test_cgrp2_sock2.sh
 
 
test_cgrp2_tc.sh
test_cgrp2_tc.sh
 
 
test_cgrp2_tc_kern.c
test_cgrp2_tc_kern.c
 
 
test_cls_bpf.sh
test_cls_bpf.sh
 
 
test_current_task_under_cgroup_kern.c
test_current_task_under_cgroup_kern.c
 
 
test_current_task_under_cgroup_user.c
test_current_task_under_cgroup_user.c
 
 
test_ipip.sh
test_ipip.sh
 
 
test_lru_dist.c
test_lru_dist.c
 
 
test_lwt_bpf.c
test_lwt_bpf.c
 
 
test_lwt_bpf.sh
test_lwt_bpf.sh
 
 
test_map_in_map_kern.c
test_map_in_map_kern.c
 
 
test_map_in_map_user.c
test_map_in_map_user.c
 
 
test_overhead_kprobe_kern.c
test_overhead_kprobe_kern.c
 
 
test_overhead_tp_kern.c
test_overhead_tp_kern.c
 
 
test_overhead_user.c
test_overhead_user.c
 
 
test_probe_write_user_kern.c
test_probe_write_user_kern.c
 
 
test_probe_write_user_user.c
test_probe_write_user_user.c
 
 
test_tunnel_bpf.sh
test_tunnel_bpf.sh
 
 
trace_event_kern.c
trace_event_kern.c
 
 
trace_event_user.c
trace_event_user.c
 
 
trace_output_kern.c
trace_output_kern.c
 
 
trace_output_user.c
trace_output_user.c
 
 
tracex1_kern.c
tracex1_kern.c
 
 
tracex1_user.c
tracex1_user.c
 
 
tracex2_kern.c
tracex2_kern.c
 
 
tracex2_user.c
tracex2_user.c
 
 
tracex3_kern.c
tracex3_kern.c
 
 
tracex3_user.c
tracex3_user.c
 
 
tracex4_kern.c
tracex4_kern.c
 
 
tracex4_user.c
tracex4_user.c
 
 
tracex5_kern.c
tracex5_kern.c
 
 
tracex5_user.c
tracex5_user.c
 
 
tracex6_kern.c
tracex6_kern.c
 
 
tracex6_user.c
tracex6_user.c
 
 
xdp1_kern.c
xdp1_kern.c
 
 
xdp1_user.c
xdp1_user.c
 
 
xdp2_kern.c
xdp2_kern.c
 
 
xdp_monitor_kern.c
xdp_monitor_kern.c
 
 
xdp_monitor_user.c
xdp_monitor_user.c
 
 
xdp_redirect_kern.c
xdp_redirect_kern.c
 
 
xdp_redirect_map_kern.c
xdp_redirect_map_kern.c
 
 
xdp_redirect_map_user.c
xdp_redirect_map_user.c
 
 
xdp_redirect_user.c
xdp_redirect_user.c
 
 
xdp_tx_iptunnel_common.h
xdp_tx_iptunnel_common.h
 
 

README.rst

eBPF sample programs

This directory contains a test stubs, verifier test-suite and examples for using eBPF. The examples use libbpf from tools/lib/bpf.

Build dependencies

Compiling requires having installed:
  • clang >= version 3.4.0
  • llvm >= version 3.7.1

Note that LLVM's tool 'llc' must support target 'bpf', list version and supported targets with command: llc --version

Kernel headers

There are usually dependencies to header files of the current kernel. To avoid installing devel kernel headers system wide, as a normal user, simply call:

make headers_install

This will creates a local "usr/include" directory in the git/build top level directory, that the make system automatically pickup first.

Compiling

For building the BPF samples, issue the below command from the kernel top level directory:

make samples/bpf/

Do notice the "/" slash after the directory name.

It is also possible to call make from this directory. This will just hide the the invocation of make as above with the appended "/".

Manually compiling LLVM with 'bpf' support

Since version 3.7.0, LLVM adds a proper LLVM backend target for the BPF bytecode architecture.

By default llvm will build all non-experimental backends including bpf. To generate a smaller llc binary one can use:

-DLLVM_TARGETS_TO_BUILD="BPF"

Quick sniplet for manually compiling LLVM and clang (build dependencies are cmake and gcc-c++):

$ git clone http://llvm.org/git/llvm.git
$ cd llvm/tools
$ git clone --depth 1 http://llvm.org/git/clang.git
$ cd ..; mkdir build; cd build
$ cmake .. -DLLVM_TARGETS_TO_BUILD="BPF;X86"
$ make -j $(getconf _NPROCESSORS_ONLN)

It is also possible to point make to the newly compiled 'llc' or 'clang' command via redefining LLC or CLANG on the make command line:

make samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang