linux/samples/bpf
Alexei Starovoitov 4662a4e538 samples/bpf: raw tracepoint test
add empty raw_tracepoint bpf program to test overhead similar
to kprobe and traditional tracepoint tests

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-03-28 22:55:19 +02:00
..
Makefile samples/bpf: raw tracepoint test 2018-03-28 22:55:19 +02:00
README.rst samples/bpf: Add documentation on cross compilation 2017-09-21 11:59:16 -07:00
bpf_load.c samples/bpf: raw tracepoint test 2018-03-28 22:55:19 +02:00
bpf_load.h samples/bpf: use bpf_set_link_xdp_fd 2018-02-02 17:53:48 -08:00
cookie_uid_helper_example.c samples/bpf: fix spelling mistake: "revieve" -> "receive" 2018-03-28 15:30:25 +02:00
cpustat_kern.c samples/bpf: Add program for CPU state statistics 2018-02-26 10:54:02 +01:00
cpustat_user.c samples/bpf: Add program for CPU state statistics 2018-02-26 10:54:02 +01:00
fds_example.c
lathist_kern.c
lathist_user.c
libbpf.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
load_sock_ops.c bpf: program to load and attach sock_ops BPF progs 2017-07-01 16:15:13 -07:00
lwt_len_hist.sh License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
lwt_len_hist_kern.c
lwt_len_hist_user.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
map_perf_test_kern.c samples/bpf: Use getppid instead of getpgrp for array map stress 2017-09-21 11:59:16 -07:00
map_perf_test_user.c bpf: libbpf: Provide basic API support to specify BPF obj name 2017-09-29 06:17:05 +01:00
offwaketime_kern.c
offwaketime_user.c
parse_ldabs.c
parse_simple.c
parse_varlen.c
run_cookie_uid_helper_example.sh License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sampleip_kern.c
sampleip_user.c
sock_example.c
sock_example.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sock_flags_kern.c samples/bpf: Update cgroup socket examples to use uid gid helper 2017-09-01 06:05:15 +01:00
sockex1_kern.c
sockex1_user.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sockex2_kern.c
sockex2_user.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sockex3_kern.c
sockex3_user.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
spintest_kern.c
spintest_user.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
syscall_nrs.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
syscall_tp_kern.c bpf: add a test case for syscalls/sys_{enter|exit}_* tracepoints 2017-08-07 14:09:48 -07:00
syscall_tp_user.c bpf: add a test case to test single tp multiple bpf attachment 2017-10-25 10:47:47 +09:00
tc_l2_redirect.sh License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tc_l2_redirect_kern.c
tc_l2_redirect_user.c
tcbpf1_kern.c
tcbpf2_kern.c samples/bpf: add gre sequence number test. 2018-03-04 18:35:02 -05:00
tcp_basertt_kern.c bpf: sample BPF_SOCKET_OPS_BASE_RTT program 2017-10-22 03:12:05 +01:00
tcp_bpf.readme bpf: Rename tcp_bbf.readme to tcp_bpf.readme 2017-11-08 12:13:41 +09:00
tcp_bufs_kern.c bpf: Fix tcp_bufs_kern.c sample program 2017-11-11 15:52:41 +09:00
tcp_clamp_kern.c bpf: Fix tcp_clamp_kern.c sample program 2017-11-11 15:52:41 +09:00
tcp_cong_kern.c bpf: Fix tcp_cong_kern.c sample program 2017-11-11 15:52:41 +09:00
tcp_iw_kern.c bpf: Fix tcp_iw_kern.c sample program 2017-11-11 15:52:41 +09:00
tcp_rwnd_kern.c bpf: Fix tcp_rwnd_kern.c sample program 2017-11-11 15:52:41 +09:00
tcp_synrto_kern.c bpf: Fix tcp_synrto_kern.c sample program 2017-11-11 15:52:41 +09:00
test_cgrp2_array_pin.c
test_cgrp2_attach.c
test_cgrp2_attach2.c samples/bpf: Convert magic numbers to names in multi-prog cgroup test case 2017-11-30 19:58:11 +01:00
test_cgrp2_sock.c samples/bpf: Update cgroup socket examples to use uid gid helper 2017-09-01 06:05:15 +01:00
test_cgrp2_sock.sh samples/bpf: detach prog from cgroup 2018-03-02 00:16:36 +01:00
test_cgrp2_sock2.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
test_cgrp2_sock2.sh samples/bpf: detach prog from cgroup 2018-03-02 00:16:36 +01:00
test_cgrp2_tc.sh License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
test_cgrp2_tc_kern.c
test_cls_bpf.sh License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
test_current_task_under_cgroup_kern.c
test_current_task_under_cgroup_user.c
test_ipip.sh License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
test_lru_dist.c
test_lwt_bpf.c
test_lwt_bpf.sh License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
test_map_in_map_kern.c
test_map_in_map_user.c bpf: Add test for syscall on fd array/htab lookup 2017-06-29 13:13:26 -04:00
test_overhead_kprobe_kern.c
test_overhead_raw_tp_kern.c samples/bpf: raw tracepoint test 2018-03-28 22:55:19 +02:00
test_overhead_tp_kern.c
test_overhead_user.c samples/bpf: raw tracepoint test 2018-03-28 22:55:19 +02:00
test_override_return.sh samples/bpf: add a test for bpf_override_return 2017-12-12 09:02:40 -08:00
test_probe_write_user_kern.c
test_probe_write_user_user.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
test_tunnel_bpf.sh samples/bpf: add gre sequence number test. 2018-03-04 18:35:02 -05:00
trace_event_kern.c samples/bpf: add example to test reading address 2018-03-08 02:22:34 +01:00
trace_event_user.c samples/bpf: add example to test reading address 2018-03-08 02:22:34 +01:00
trace_output_kern.c
trace_output_user.c
tracex1_kern.c
tracex1_user.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tracex2_kern.c
tracex2_user.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tracex3_kern.c
tracex3_user.c
tracex4_kern.c
tracex4_user.c
tracex5_kern.c samples/bpf: Fix tracex5 to work with MIPS syscalls. 2017-06-14 15:03:23 -04:00
tracex5_user.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tracex6_kern.c bpf: add a test case for helper bpf_perf_event_read_value 2017-10-07 23:05:57 +01:00
tracex6_user.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-11-04 09:26:51 +09:00
tracex7_kern.c samples/bpf: add a test for bpf_override_return 2017-12-12 09:02:40 -08:00
tracex7_user.c samples/bpf: add a test for bpf_override_return 2017-12-12 09:02:40 -08:00
xdp1_kern.c
xdp1_user.c samples/bpf: use bpf_set_link_xdp_fd 2018-02-02 17:53:48 -08:00
xdp2_kern.c
xdp2skb_meta.sh samples/bpf: xdp2skb_meta shows transferring info from XDP to SKB 2018-01-11 01:02:25 +01:00
xdp2skb_meta_kern.c samples/bpf: xdp2skb_meta comment explain why pkt-data pointers are invalidated 2018-01-18 01:49:09 +01:00
xdp_monitor_kern.c samples/bpf: xdp_monitor include cpumap tracepoints in monitoring 2018-01-20 02:10:55 +01:00
xdp_monitor_user.c samples/bpf: xdp_monitor include cpumap tracepoints in monitoring 2018-01-20 02:10:55 +01:00
xdp_redirect_cpu_kern.c samples/bpf: add cpumap sample program xdp_redirect_cpu 2017-10-18 12:12:18 +01:00
xdp_redirect_cpu_user.c samples/bpf: use bpf_set_link_xdp_fd 2018-02-02 17:53:48 -08:00
xdp_redirect_kern.c samples/bpf: Fix compilation issue in redirect dummy program 2017-08-31 11:56:57 -07:00
xdp_redirect_map_kern.c samples/bpf: Fix compilation issue in redirect dummy program 2017-08-31 11:56:57 -07:00
xdp_redirect_map_user.c samples/bpf: use bpf_set_link_xdp_fd 2018-02-02 17:53:48 -08:00
xdp_redirect_user.c samples/bpf: adjust rlimit RLIMIT_MEMLOCK for xdp_redirect 2018-02-13 17:42:01 -08:00
xdp_router_ipv4_kern.c xdp: Sample xdp program implementing ip forward 2017-11-08 10:39:41 +09:00
xdp_router_ipv4_user.c samples/bpf: use bpf_set_link_xdp_fd 2018-02-02 17:53:48 -08:00
xdp_rxq_info_kern.c samples/bpf: program demonstrating access to xdp_rxq_info 2018-01-05 15:21:22 -08:00
xdp_rxq_info_user.c samples/bpf: use bpf_set_link_xdp_fd 2018-02-02 17:53:48 -08:00
xdp_tx_iptunnel_common.h
xdp_tx_iptunnel_kern.c
xdp_tx_iptunnel_user.c samples/bpf: use bpf_set_link_xdp_fd 2018-02-02 17:53:48 -08:00

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

Cross compiling samples
-----------------------
In order to cross-compile, say for arm64 targets, export CROSS_COMPILE and ARCH
environment variables before calling make. This will direct make to build
samples for the cross target.

export ARCH=arm64
export CROSS_COMPILE="aarch64-linux-gnu-"
make samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang