linux/samples/bpf
Linus Torvalds ff2ae607c6 SPDX patches for 5.7-rc1.
Here are 3 SPDX patches for 5.7-rc1.
 
 One fixes up the SPDX tag for a single driver, while the other two go
 through the tree and add SPDX tags for all of the .gitignore files as
 needed.
 
 Nothing too complex, but you will get a merge conflict with your current
 tree, that should be trivial to handle (one file modified by two things,
 one file deleted.)
 
 All 3 of these have been in linux-next for a while, with no reported
 issues other than the merge conflict.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'spdx-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/spdx

Pull SPDX updates from Greg KH:
 "Here are three SPDX patches for 5.7-rc1.

  One fixes up the SPDX tag for a single driver, while the other two go
  through the tree and add SPDX tags for all of the .gitignore files as
  needed.

  Nothing too complex, but you will get a merge conflict with your
  current tree, that should be trivial to handle (one file modified by
  two things, one file deleted.)

  All three of these have been in linux-next for a while, with no
  reported issues other than the merge conflict"

* tag 'spdx-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/spdx:
  ASoC: MT6660: make spdxcheck.py happy
  .gitignore: add SPDX License Identifier
  .gitignore: remove too obvious comments
2020-04-03 13:12:26 -07:00
..
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
Makefile samples, bpf: Refactor perf_event user program with libbpf bpf_link 2020-03-23 22:27:57 +01:00
Makefile.target samples/bpf: Add makefile.target for separate CC target build 2019-10-12 16:08:59 -07:00
README.rst samples/bpf: adjust Makefile and README.rst 2019-11-11 21:42:09 -08:00
asm_goto_workaround.h samples/bpf: Add a workaround for asm_inline 2019-10-03 17:37:11 +02:00
bpf_insn.h selftests: bpf: functional and min/max reasoning unit tests for JMP32 2019-01-26 13:33:02 -08:00
bpf_load.c samples, bpf: Move read_trace_pipe to trace_helpers 2020-03-23 22:27:51 +01:00
bpf_load.h samples, bpf: Move read_trace_pipe to trace_helpers 2020-03-23 22:27:51 +01:00
cookie_uid_helper_example.c samples: bpf: rename libbpf.h to bpf_insn.h 2018-05-14 22:52:10 -07:00
cpustat_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
cpustat_user.c samples: bpf: include bpf/bpf.h instead of local libbpf.h 2018-05-14 22:52:10 -07:00
do_hbm_test.sh bpf: Add support for fq's EDT to HBM 2019-07-03 15:03:00 +02:00
fds_example.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
hash_func01.h samples/bpf: add Paul Hsieh's (LGPL 2.1) hash function SuperFastHash 2018-08-10 16:07:49 +02:00
hbm.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
hbm.h bpf: Add more stats to HBM 2019-05-31 16:41:29 -07:00
hbm_edt_kern.c bpf: Add support for fq's EDT to HBM 2019-07-03 15:03:00 +02:00
hbm_kern.h samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
hbm_out_kern.c bpf: Add more stats to HBM 2019-05-31 16:41:29 -07:00
ibumad_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
ibumad_user.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
lathist_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
lathist_user.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -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 samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
lwt_len_hist_user.c samples: bpf: include bpf/bpf.h instead of local libbpf.h 2018-05-14 22:52:10 -07:00
map_perf_test_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
map_perf_test_user.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
offwaketime_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
offwaketime_user.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
parse_ldabs.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
parse_simple.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
parse_varlen.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
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 samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
sampleip_user.c samples, bpf: Refactor perf_event user program with libbpf bpf_link 2020-03-23 22:27:57 +01:00
sock_example.c samples: bpf: force IPv4 in ping 2019-03-01 00:53:45 +01:00
sock_example.h samples: bpf: include bpf/bpf.h instead of local libbpf.h 2018-05-14 22:52:10 -07:00
sock_flags_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
sockex1_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
sockex1_user.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
sockex2_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
sockex2_user.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
sockex3_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
sockex3_user.c samples: bpf: force IPv4 in ping 2019-03-01 00:53:45 +01:00
spintest_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
spintest_user.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
syscall_nrs.c samples: bpf: syscall_nrs: use mmap2 if defined 2019-08-21 14:31:38 +02:00
syscall_tp_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
syscall_tp_user.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
task_fd_query_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
task_fd_query_user.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
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 samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
tc_l2_redirect_user.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
tcbpf1_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
tcp_basertt_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
tcp_bpf.readme samples/bpf: fix tcp_bpf.readme detach command 2019-07-03 16:52:02 +02:00
tcp_bufs_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
tcp_clamp_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
tcp_cong_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
tcp_dumpstats_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
tcp_iw_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
tcp_rwnd_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
tcp_synrto_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
tcp_tos_reflect_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
test_cgrp2_array_pin.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
test_cgrp2_attach.c samples: bpf: rename libbpf.h to bpf_insn.h 2018-05-14 22:52:10 -07:00
test_cgrp2_sock.c samples: bpf: rename libbpf.h to bpf_insn.h 2018-05-14 22:52:10 -07:00
test_cgrp2_sock.sh samples/bpf: detach prog from cgroup 2018-03-02 00:16:36 +01:00
test_cgrp2_sock2.c samples/bpf: test_cgrp2_sock2: fix an off by one 2018-07-16 15:01:09 -07:00
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 samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
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 samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
test_current_task_under_cgroup_user.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
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 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
test_lwt_bpf.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
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 samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
test_map_in_map_user.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
test_overhead_kprobe_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
test_overhead_raw_tp_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
test_overhead_tp_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
test_overhead_user.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
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 samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
test_probe_write_user_user.c samples: bpf: include bpf/bpf.h instead of local libbpf.h 2018-05-14 22:52:10 -07:00
trace_event_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
trace_event_user.c samples, bpf: Refactor perf_event user program with libbpf bpf_link 2020-03-23 22:27:57 +01:00
trace_output_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
trace_output_user.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
tracex1_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
tracex1_user.c samples, bpf: Move read_trace_pipe to trace_helpers 2020-03-23 22:27:51 +01:00
tracex2_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
tracex2_user.c samples: bpf: force IPv4 in ping 2019-03-01 00:53:45 +01:00
tracex3_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
tracex3_user.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
tracex4_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
tracex4_user.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
tracex5_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
tracex5_user.c samples, bpf: Move read_trace_pipe to trace_helpers 2020-03-23 22:27:51 +01:00
tracex6_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
tracex6_user.c samples: bpf: include bpf/bpf.h instead of local libbpf.h 2018-05-14 22:52:10 -07:00
tracex7_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
tracex7_user.c samples: bpf: include bpf/bpf.h instead of local libbpf.h 2018-05-14 22:52:10 -07:00
xdp1_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
xdp1_user.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
xdp2_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
xdp2skb_meta.sh samples/bpf: Fix tc and ip paths in xdp2skb_meta.sh 2018-07-10 09:19:01 +02:00
xdp2skb_meta_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
xdp_adjust_tail_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
xdp_adjust_tail_user.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
xdp_fwd_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
xdp_fwd_user.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
xdp_monitor_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
xdp_monitor_user.c samples/bpf: xdp_monitor use err code from tracepoint xdp:xdp_devmap_xmit 2018-05-24 18:36:15 -07:00
xdp_redirect_cpu_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
xdp_redirect_cpu_user.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
xdp_redirect_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
xdp_redirect_map_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
xdp_redirect_map_user.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
xdp_redirect_user.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
xdp_router_ipv4_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
xdp_router_ipv4_user.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
xdp_rxq_info_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
xdp_rxq_info_user.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
xdp_sample_pkts_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
xdp_sample_pkts_user.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
xdp_tx_iptunnel_common.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
xdp_tx_iptunnel_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
xdp_tx_iptunnel_user.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
xdpsock.h samples/bpf: Add XDP_SHARED_UMEM support to xdpsock 2019-11-10 19:30:45 -08:00
xdpsock_kern.c samples/bpf: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
xdpsock_user.c samples: bpf: Allow for -ENETDOWN in xdpsock 2020-02-05 22:06:09 +01:00

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``

Clean and configuration
-----------------------

It can be needed to clean tools, samples or kernel before trying new arch or
after some changes (on demand)::

 make -C tools clean
 make -C samples/bpf clean
 make clean

Configure kernel, defconfig for instance::

 make defconfig

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 M=samples/bpf

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

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 M=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. But do this before clean,
cofiguration and header install steps described above. This will direct make to
build samples for the cross target::

 export ARCH=arm64
 export CROSS_COMPILE="aarch64-linux-gnu-"

Headers can be also installed on RFS of target board if need to keep them in
sync (not necessarily and it creates a local "usr/include" directory also)::

 make INSTALL_HDR_PATH=~/some_sysroot/usr headers_install

Pointing LLC and CLANG is not necessarily if it's installed on HOST and have
in its targets appropriate arm64 arch (usually it has several arches).
Build samples::

 make M=samples/bpf

Or build samples with SYSROOT if some header or library is absent in toolchain,
say libelf, providing address to file system containing headers and libs,
can be RFS of target board::

 make M=samples/bpf SYSROOT=~/some_sysroot