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linux_kernel
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samples
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bpf
Michael Holzheu 2dbb4c05d0 bpf/samples: Fix PT_REGS_IP on s390x and use it 8 anni fa
..
Makefile 90e02896f1 bpf: Add test for bpf_redirect to ipip/ip6tnl 8 anni fa
README.rst bdefbbf2ec samples/bpf: like LLC also verify and allow redefining CLANG command 9 anni fa
bpf_helpers.h 2dbb4c05d0 bpf/samples: Fix PT_REGS_IP on s390x and use it 8 anni fa
bpf_load.c 1c47910ef8 samples/bpf: add perf_event+bpf example 9 anni fa
bpf_load.h 3622e7e493 samples/bpf: move ksym_search() into library 9 anni fa
fds_example.c 89b9760701 samples/bpf: add map_flags to bpf loader 9 anni fa
lathist_kern.c 0fb1170ee6 bpf: BPF based latency tracing 10 anni fa
lathist_user.c 0fb1170ee6 bpf: BPF based latency tracing 10 anni fa
libbpf.c 89b9760701 samples/bpf: add map_flags to bpf loader 9 anni fa
libbpf.h 484611357c bpf: allow access into map value arrays 8 anni fa
map_perf_test_kern.c 26e9093110 samples/bpf: add map performance test 9 anni fa
map_perf_test_user.c 77e63534d6 samples/bpf: Fix build breakage with map_perf_test_user.c 9 anni fa
offwaketime_kern.c 02413cabd6 bpf, samples: don't zero data when not needed 9 anni fa
offwaketime_user.c 3622e7e493 samples/bpf: move ksym_search() into library 9 anni fa
parse_ldabs.c 96a8eb1eee bpf: fix samples to add fake KBUILD_MODNAME 8 anni fa
parse_simple.c 96a8eb1eee bpf: fix samples to add fake KBUILD_MODNAME 8 anni fa
parse_varlen.c 96a8eb1eee bpf: fix samples to add fake KBUILD_MODNAME 8 anni fa
sampleip_kern.c 2dbb4c05d0 bpf/samples: Fix PT_REGS_IP on s390x and use it 8 anni fa
sampleip_user.c 72874418e4 samples/bpf: add sampleip example 9 anni fa
sock_example.c 89b9760701 samples/bpf: add map_flags to bpf loader 9 anni fa
sockex1_kern.c 614cd3bd37 samples: bpf: add skb->field examples and tests 10 anni fa
sockex1_user.c 614cd3bd37 samples: bpf: add skb->field examples and tests 10 anni fa
sockex2_kern.c 2b064fff85 bpf samples: fix compiler errors with sockex2 and sockex3 8 anni fa
sockex2_user.c eb88d58559 samples/bpf: set max locked memory to ulimited 9 anni fa
sockex3_kern.c 2b064fff85 bpf samples: fix compiler errors with sockex2 and sockex3 8 anni fa
sockex3_user.c 2b064fff85 bpf samples: fix compiler errors with sockex2 and sockex3 8 anni fa
spintest_kern.c 138d6153a1 samples/bpf: Enable powerpc support 9 anni fa
spintest_user.c 9d8b612d88 samples/bpf: add bpf map stress test 9 anni fa
tc_l2_redirect.sh 90e02896f1 bpf: Add test for bpf_redirect to ipip/ip6tnl 8 anni fa
tc_l2_redirect_kern.c 90e02896f1 bpf: Add test for bpf_redirect to ipip/ip6tnl 8 anni fa
tc_l2_redirect_user.c 90e02896f1 bpf: Add test for bpf_redirect to ipip/ip6tnl 8 anni fa
tcbpf1_kern.c 96a8eb1eee bpf: fix samples to add fake KBUILD_MODNAME 8 anni fa
tcbpf2_kern.c 96a8eb1eee bpf: fix samples to add fake KBUILD_MODNAME 8 anni fa
test_cgrp2_array_pin.c a3f7461734 cgroup: bpf: Add an example to do cgroup checking in BPF 9 anni fa
test_cgrp2_tc.sh a3f7461734 cgroup: bpf: Add an example to do cgroup checking in BPF 9 anni fa
test_cgrp2_tc_kern.c 96a8eb1eee bpf: fix samples to add fake KBUILD_MODNAME 8 anni fa
test_cls_bpf.sh 65d472fb00 samples/bpf: add 'pointer to packet' tests 9 anni fa
test_current_task_under_cgroup_kern.c 9e6e60ecbd samples/bpf: Add test_current_task_under_cgroup test 9 anni fa
test_current_task_under_cgroup_user.c 9e6e60ecbd samples/bpf: Add test_current_task_under_cgroup test 9 anni fa
test_ipip.sh 173ca26e9b samples/bpf: add comprehensive ipip, ipip6, ip6ip6 test 9 anni fa
test_maps.c ba0cc3c153 samples/bpf: add bpf_map_update_elem() tests 9 anni fa
test_overhead_kprobe_kern.c e3edfdec04 samples/bpf: add tracepoint vs kprobe performance tests 9 anni fa
test_overhead_tp_kern.c e3edfdec04 samples/bpf: add tracepoint vs kprobe performance tests 9 anni fa
test_overhead_user.c e3edfdec04 samples/bpf: add tracepoint vs kprobe performance tests 9 anni fa
test_probe_write_user_kern.c cf9b1199de samples/bpf: Add test/example of using bpf_probe_write_user bpf helper 9 anni fa
test_probe_write_user_user.c cf9b1199de samples/bpf: Add test/example of using bpf_probe_write_user bpf helper 9 anni fa
test_tunnel_bpf.sh a1c82704d1 samples/bpf: extend test_tunnel_bpf.sh with IPIP test 9 anni fa
test_verifier.c 484611357c bpf: allow access into map value arrays 8 anni fa
trace_event_kern.c 2dbb4c05d0 bpf/samples: Fix PT_REGS_IP on s390x and use it 8 anni fa
trace_event_user.c 1c47910ef8 samples/bpf: add perf_event+bpf example 9 anni fa
trace_output_kern.c 569cc39d39 samples/bpf: fix trace_output example 9 anni fa
trace_output_user.c 39111695b1 samples: bpf: add bpf_perf_event_output example 9 anni fa
tracex1_kern.c 02413cabd6 bpf, samples: don't zero data when not needed 9 anni fa
tracex1_user.c b896c4f95a samples/bpf: Add simple non-portable kprobe filter example 10 anni fa
tracex2_kern.c 02413cabd6 bpf, samples: don't zero data when not needed 9 anni fa
tracex2_user.c 3059303f59 samples/bpf: update tracex[23] examples to use per-cpu maps 9 anni fa
tracex3_kern.c 3059303f59 samples/bpf: update tracex[23] examples to use per-cpu maps 9 anni fa
tracex3_user.c 3059303f59 samples/bpf: update tracex[23] examples to use per-cpu maps 9 anni fa
tracex4_kern.c 138d6153a1 samples/bpf: Enable powerpc support 9 anni fa
tracex4_user.c 9811e35359 samples/bpf: Add kmem_alloc()/free() tracker tool 10 anni fa
tracex5_kern.c 973d94d8a8 bpf samples: update tracex5 sample to use __seccomp_filter 8 anni fa
tracex5_user.c 973d94d8a8 bpf samples: update tracex5 sample to use __seccomp_filter 8 anni fa
tracex6_kern.c 5ed3ccbd5a bpf: fix build warnings and add function read_trace_pipe() 10 anni fa
tracex6_user.c 5ed3ccbd5a bpf: fix build warnings and add function read_trace_pipe() 10 anni fa
xdp1_kern.c d9094bda5c bpf: make xdp sample variable names more meaningful 9 anni fa
xdp1_user.c 86af8b4191 Add sample for adding simple drop program to link 9 anni fa
xdp2_kern.c d9094bda5c bpf: make xdp sample variable names more meaningful 9 anni fa

README.rst

eBPF sample programs
====================

This directory contains a mini eBPF library, test stubs, verifier
test-suite and examples for using eBPF.

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