linux/samples/bpf
Jesper Dangaard Brouer 58aa94f922 devmap: Adjust tracepoint for map-less queue flush
Now that we don't have a reference to a devmap when flushing the device
bulk queue, let's change the the devmap_xmit tracepoint to remote the
map_id and map_index fields entirely. Rearrange the fields so 'drops' and
'sent' stay in the same position in the tracepoint struct, to make it
possible for the xdp_monitor utility to read both the old and the new
format.

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/157918768613.1458396.9165902403373826572.stgit@toke.dk
2020-01-16 20:03:34 -08:00
..
.gitignore samples: bpf: add ibumad sample to .gitignore 2019-05-24 19:58:03 -07:00
Makefile samples/bpf: Set -fno-stack-protector when building BPF programs 2019-12-16 07:03:12 -08:00
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 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-06-17 20:20:36 -07:00
bpf_load.h samples: bpf: include bpf/bpf.h instead of local libbpf.h 2018-05-14 22:52:10 -07:00
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: Add program for CPU state statistics 2018-02-26 10:54:02 +01:00
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: refactor header include path 2019-06-18 00:28:36 +02:00
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hbm.c samples: bpf: Update outdated error message 2019-11-08 19:19:43 -08:00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 selftests/bpf: samples/bpf: Split off legacy stuff from bpf_helpers.h 2019-10-08 23:16:03 +02:00
hbm_out_kern.c bpf: Add more stats to HBM 2019-05-31 16:41:29 -07:00
ibumad_kern.c samples: bpf: Remove bpf_debug macro in favor of bpf_printk 2019-06-24 18:18:30 -07:00
ibumad_user.c samples: bpf: refactor header include path 2019-06-18 00:28:36 +02:00
lathist_kern.c bpf: BPF based latency tracing 2015-06-23 06:09:58 -07:00
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 bpf: Add tests and samples for LWT-BPF 2016-12-02 10:52:00 -05:00
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 bpf, samples: Use bpf_probe_read_user where appropriate 2019-11-02 12:39:13 -07:00
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 selftests/bpf: Split off tracing-only helpers into bpf_tracing.h 2019-10-08 23:16:03 +02:00
offwaketime_user.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
parse_ldabs.c selftests/bpf: samples/bpf: Split off legacy stuff from bpf_helpers.h 2019-10-08 23:16:03 +02:00
parse_simple.c bpf: fix samples to add fake KBUILD_MODNAME 2016-10-29 14:46:12 -04:00
parse_varlen.c samples/bpf: add missing <linux/if_vlan.h> 2018-07-05 09:58:52 +02:00
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 selftests/bpf: Split off tracing-only helpers into bpf_tracing.h 2019-10-08 23:16:03 +02:00
sampleip_user.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
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: Update cgroup socket examples to use uid gid helper 2017-09-01 06:05:15 +01:00
sockex1_kern.c samples: bpf: update map definition to new syntax BTF-defined map 2019-11-08 19:21:52 -08:00
sockex1_user.c samples: bpf: refactor header include path 2019-06-18 00:28:36 +02:00
sockex2_kern.c samples: bpf: update map definition to new syntax BTF-defined map 2019-11-08 19:21:52 -08:00
sockex2_user.c samples: bpf: refactor header include path 2019-06-18 00:28:36 +02:00
sockex3_kern.c selftests/bpf: samples/bpf: Split off legacy stuff from bpf_helpers.h 2019-10-08 23:16:03 +02:00
sockex3_user.c samples: bpf: force IPv4 in ping 2019-03-01 00:53:45 +01:00
spintest_kern.c selftests/bpf: Split off tracing-only helpers into bpf_tracing.h 2019-10-08 23:16:03 +02:00
spintest_user.c samples, selftests/bpf: add NULL check for ksym_search 2019-04-04 16:43:47 +02:00
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: fix syscall_tp due to unused syscall 2019-12-11 15:28:06 -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: fix: broken sample regarding removed function 2019-02-27 17:27:22 +01:00
task_fd_query_user.c samples/bpf: Fix build for task_fd_query_user.c 2019-10-03 16:27:03 +02:00
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 bpf: fix samples xdp_tx_iptunnel and tc_l2_redirect with fake KBUILD_MODNAME 2017-01-20 12:04:07 -05:00
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 selftests/bpf: samples/bpf: Split off legacy stuff from bpf_helpers.h 2019-10-08 23:16:03 +02:00
tcp_basertt_kern.c samples: bpf: Do not define bpf_printk macro 2019-05-24 13:47:17 -07:00
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: Do not define bpf_printk macro 2019-05-24 13:47:17 -07:00
tcp_clamp_kern.c samples: bpf: Do not define bpf_printk macro 2019-05-24 13:47:17 -07:00
tcp_cong_kern.c samples: bpf: Do not define bpf_printk macro 2019-05-24 13:47:17 -07:00
tcp_dumpstats_kern.c samples/bpf: add sample program that periodically dumps TCP stats 2019-07-03 16:52:02 +02:00
tcp_iw_kern.c samples: bpf: Do not define bpf_printk macro 2019-05-24 13:47:17 -07:00
tcp_rwnd_kern.c samples: bpf: Do not define bpf_printk macro 2019-05-24 13:47:17 -07:00
tcp_synrto_kern.c samples: bpf: Do not define bpf_printk macro 2019-05-24 13:47:17 -07:00
tcp_tos_reflect_kern.c samples: bpf: Do not define bpf_printk macro 2019-05-24 13:47:17 -07:00
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 bpf: fix samples to add fake KBUILD_MODNAME 2016-10-29 14:46:12 -04:00
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: Add test_current_task_under_cgroup test 2016-08-12 21:49:42 -07:00
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 bpf: Add tests and samples for LWT-BPF 2016-12-02 10:52:00 -05:00
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 bpf, samples: Use bpf_probe_read_user where appropriate 2019-11-02 12:39:13 -07:00
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 selftests/bpf: Split off tracing-only helpers into bpf_tracing.h 2019-10-08 23:16:03 +02:00
test_overhead_raw_tp_kern.c samples/bpf: raw tracepoint test 2018-03-28 22:55:19 +02:00
test_overhead_tp_kern.c samples/bpf: add tracepoint vs kprobe performance tests 2016-04-07 21:04:27 -04:00
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 bpf, samples: Use bpf_probe_read_user where appropriate 2019-11-02 12:39:13 -07:00
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 selftests/bpf: Split off tracing-only helpers into bpf_tracing.h 2019-10-08 23:16:03 +02:00
trace_event_user.c samples: bpf: Replace symbol compare of trace_event 2019-12-11 15:27:28 -08:00
trace_output_kern.c samples/bpf: fix trace_output example 2016-04-28 17:29:45 -04:00
trace_output_user.c samples/bpf: switch trace_output sample to perf_buffer API 2019-07-23 16:05:42 -07:00
tracex1_kern.c selftests/bpf: Split off tracing-only helpers into bpf_tracing.h 2019-10-08 23:16:03 +02:00
tracex1_user.c samples: bpf: include bpf/bpf.h instead of local libbpf.h 2018-05-14 22:52:10 -07:00
tracex2_kern.c selftests/bpf: Split off tracing-only helpers into bpf_tracing.h 2019-10-08 23:16:03 +02:00
tracex2_user.c samples: bpf: force IPv4 in ping 2019-03-01 00:53:45 +01:00
tracex3_kern.c selftests/bpf: Split off tracing-only helpers into bpf_tracing.h 2019-10-08 23:16:03 +02:00
tracex3_user.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
tracex4_kern.c selftests/bpf: Split off tracing-only helpers into bpf_tracing.h 2019-10-08 23:16:03 +02:00
tracex4_user.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
tracex5_kern.c selftests/bpf: Split off tracing-only helpers into bpf_tracing.h 2019-10-08 23:16:03 +02:00
tracex5_user.c samples: bpf: include bpf/bpf.h instead of local libbpf.h 2018-05-14 22:52:10 -07:00
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 samples: bpf: include bpf/bpf.h instead of local libbpf.h 2018-05-14 22:52:10 -07:00
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: include bpf/bpf.h instead of local libbpf.h 2018-05-14 22:52:10 -07:00
xdp1_kern.c samples: bpf: update map definition to new syntax BTF-defined map 2019-11-08 19:21:52 -08:00
xdp1_user.c samples/bpf: Attach XDP programs in driver mode by default 2019-12-16 07:05:38 -08:00
xdp2_kern.c samples: bpf: update map definition to new syntax BTF-defined map 2019-11-08 19:21:52 -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: xdp2skb_meta comment explain why pkt-data pointers are invalidated 2018-01-18 01:49:09 +01:00
xdp_adjust_tail_kern.c samples: bpf: update map definition to new syntax BTF-defined map 2019-11-08 19:21:52 -08:00
xdp_adjust_tail_user.c samples/bpf: Attach XDP programs in driver mode by default 2019-12-16 07:05:38 -08:00
xdp_fwd_kern.c samples: bpf: update map definition to new syntax BTF-defined map 2019-11-08 19:21:52 -08:00
xdp_fwd_user.c samples/bpf: Attach XDP programs in driver mode by default 2019-12-16 07:05:38 -08:00
xdp_monitor_kern.c devmap: Adjust tracepoint for map-less queue flush 2020-01-16 20:03:34 -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: update map definition to new syntax BTF-defined map 2019-11-08 19:21:52 -08:00
xdp_redirect_cpu_user.c samples/bpf: Xdp_redirect_cpu fix missing tracepoint attach 2019-12-20 16:13:43 -08:00
xdp_redirect_kern.c samples: bpf: update map definition to new syntax BTF-defined map 2019-11-08 19:21:52 -08:00
xdp_redirect_map_kern.c samples: bpf: update map definition to new syntax BTF-defined map 2019-11-08 19:21:52 -08:00
xdp_redirect_map_user.c samples/bpf: Attach XDP programs in driver mode by default 2019-12-16 07:05:38 -08:00
xdp_redirect_user.c samples/bpf: Attach XDP programs in driver mode by default 2019-12-16 07:05:38 -08:00
xdp_router_ipv4_kern.c samples: bpf: update map definition to new syntax BTF-defined map 2019-11-08 19:21:52 -08:00
xdp_router_ipv4_user.c samples/bpf: Attach XDP programs in driver mode by default 2019-12-16 07:05:38 -08:00
xdp_rxq_info_kern.c samples: bpf: update map definition to new syntax BTF-defined map 2019-11-08 19:21:52 -08:00
xdp_rxq_info_user.c samples/bpf: Attach XDP programs in driver mode by default 2019-12-16 07:05:38 -08:00
xdp_sample_pkts_kern.c samples: bpf: Do not define bpf_printk macro 2019-05-24 13:47:17 -07:00
xdp_sample_pkts_user.c samples/bpf: Attach XDP programs in driver mode by default 2019-12-16 07:05:38 -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: update map definition to new syntax BTF-defined map 2019-11-08 19:21:52 -08:00
xdp_tx_iptunnel_user.c samples/bpf: Attach XDP programs in driver mode by default 2019-12-16 07:05:38 -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: Add XDP_SHARED_UMEM support to xdpsock 2019-11-10 19:30:45 -08:00
xdpsock_user.c samples/bpf: xdpsock: Add option to specify transmit fill pattern 2019-12-20 16:10:39 -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``

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