8ac91df6de
To avoid confusion caused by the increasing fragmentation of the BPF Loader program, this commit would like to change to the libbpf loader instead of using the bpf_load. Thanks to libbpf's bpf_link interface, managing the tracepoint BPF program is much easier. bpf_program__attach_tracepoint manages the enable of tracepoint event and attach of BPF programs to it with a single interface bpf_link, so there is no need to manage event_fd and prog_fd separately. This commit refactors xdp_monitor with using this libbpf API, and the bpf_load is removed and migrated to libbpf. Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20201010181734.1109-2-danieltimlee@gmail.com
330 lines
11 KiB
Makefile
330 lines
11 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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BPF_SAMPLES_PATH ?= $(abspath $(srctree)/$(src))
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TOOLS_PATH := $(BPF_SAMPLES_PATH)/../../tools
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# List of programs to build
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tprogs-y := test_lru_dist
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tprogs-y += sock_example
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tprogs-y += fds_example
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tprogs-y += sockex1
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tprogs-y += sockex2
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tprogs-y += sockex3
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tprogs-y += tracex1
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tprogs-y += tracex2
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tprogs-y += tracex3
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tprogs-y += tracex4
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tprogs-y += tracex5
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tprogs-y += tracex6
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tprogs-y += tracex7
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tprogs-y += test_probe_write_user
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tprogs-y += trace_output
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tprogs-y += lathist
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tprogs-y += offwaketime
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tprogs-y += spintest
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tprogs-y += map_perf_test
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tprogs-y += test_overhead
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tprogs-y += test_cgrp2_array_pin
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tprogs-y += test_cgrp2_attach
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tprogs-y += test_cgrp2_sock
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tprogs-y += test_cgrp2_sock2
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tprogs-y += xdp1
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tprogs-y += xdp2
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tprogs-y += xdp_router_ipv4
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tprogs-y += test_current_task_under_cgroup
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tprogs-y += trace_event
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tprogs-y += sampleip
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tprogs-y += tc_l2_redirect
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tprogs-y += lwt_len_hist
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tprogs-y += xdp_tx_iptunnel
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tprogs-y += test_map_in_map
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tprogs-y += per_socket_stats_example
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tprogs-y += xdp_redirect
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tprogs-y += xdp_redirect_map
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tprogs-y += xdp_redirect_cpu
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tprogs-y += xdp_monitor
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tprogs-y += xdp_rxq_info
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tprogs-y += syscall_tp
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tprogs-y += cpustat
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tprogs-y += xdp_adjust_tail
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tprogs-y += xdpsock
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tprogs-y += xsk_fwd
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tprogs-y += xdp_fwd
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tprogs-y += task_fd_query
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tprogs-y += xdp_sample_pkts
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tprogs-y += ibumad
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tprogs-y += hbm
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# Libbpf dependencies
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LIBBPF = $(TOOLS_PATH)/lib/bpf/libbpf.a
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CGROUP_HELPERS := ../../tools/testing/selftests/bpf/cgroup_helpers.o
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TRACE_HELPERS := ../../tools/testing/selftests/bpf/trace_helpers.o
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fds_example-objs := fds_example.o
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sockex1-objs := sockex1_user.o
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sockex2-objs := sockex2_user.o
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sockex3-objs := sockex3_user.o
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tracex1-objs := tracex1_user.o $(TRACE_HELPERS)
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tracex2-objs := tracex2_user.o
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tracex3-objs := tracex3_user.o
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tracex4-objs := tracex4_user.o
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tracex5-objs := tracex5_user.o $(TRACE_HELPERS)
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tracex6-objs := tracex6_user.o
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tracex7-objs := tracex7_user.o
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test_probe_write_user-objs := test_probe_write_user_user.o
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trace_output-objs := trace_output_user.o $(TRACE_HELPERS)
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lathist-objs := lathist_user.o
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offwaketime-objs := offwaketime_user.o $(TRACE_HELPERS)
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spintest-objs := spintest_user.o $(TRACE_HELPERS)
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map_perf_test-objs := map_perf_test_user.o
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test_overhead-objs := bpf_load.o test_overhead_user.o
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test_cgrp2_array_pin-objs := test_cgrp2_array_pin.o
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test_cgrp2_attach-objs := test_cgrp2_attach.o
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test_cgrp2_sock-objs := test_cgrp2_sock.o
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test_cgrp2_sock2-objs := bpf_load.o test_cgrp2_sock2.o
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xdp1-objs := xdp1_user.o
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# reuse xdp1 source intentionally
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xdp2-objs := xdp1_user.o
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xdp_router_ipv4-objs := xdp_router_ipv4_user.o
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test_current_task_under_cgroup-objs := $(CGROUP_HELPERS) \
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test_current_task_under_cgroup_user.o
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trace_event-objs := trace_event_user.o $(TRACE_HELPERS)
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sampleip-objs := sampleip_user.o $(TRACE_HELPERS)
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tc_l2_redirect-objs := bpf_load.o tc_l2_redirect_user.o
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lwt_len_hist-objs := bpf_load.o lwt_len_hist_user.o
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xdp_tx_iptunnel-objs := xdp_tx_iptunnel_user.o
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test_map_in_map-objs := test_map_in_map_user.o
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per_socket_stats_example-objs := cookie_uid_helper_example.o
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xdp_redirect-objs := xdp_redirect_user.o
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xdp_redirect_map-objs := xdp_redirect_map_user.o
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xdp_redirect_cpu-objs := bpf_load.o xdp_redirect_cpu_user.o
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xdp_monitor-objs := xdp_monitor_user.o
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xdp_rxq_info-objs := xdp_rxq_info_user.o
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syscall_tp-objs := syscall_tp_user.o
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cpustat-objs := cpustat_user.o
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xdp_adjust_tail-objs := xdp_adjust_tail_user.o
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xdpsock-objs := xdpsock_user.o
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xsk_fwd-objs := xsk_fwd.o
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xdp_fwd-objs := xdp_fwd_user.o
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task_fd_query-objs := bpf_load.o task_fd_query_user.o $(TRACE_HELPERS)
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xdp_sample_pkts-objs := xdp_sample_pkts_user.o $(TRACE_HELPERS)
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ibumad-objs := bpf_load.o ibumad_user.o $(TRACE_HELPERS)
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hbm-objs := bpf_load.o hbm.o $(CGROUP_HELPERS)
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# Tell kbuild to always build the programs
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always-y := $(tprogs-y)
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always-y += sockex1_kern.o
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always-y += sockex2_kern.o
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always-y += sockex3_kern.o
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always-y += tracex1_kern.o
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always-y += tracex2_kern.o
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always-y += tracex3_kern.o
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always-y += tracex4_kern.o
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always-y += tracex5_kern.o
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always-y += tracex6_kern.o
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always-y += tracex7_kern.o
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always-y += sock_flags_kern.o
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always-y += test_probe_write_user_kern.o
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always-y += trace_output_kern.o
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always-y += tcbpf1_kern.o
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always-y += tc_l2_redirect_kern.o
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always-y += lathist_kern.o
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always-y += offwaketime_kern.o
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always-y += spintest_kern.o
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always-y += map_perf_test_kern.o
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always-y += test_overhead_tp_kern.o
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always-y += test_overhead_raw_tp_kern.o
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always-y += test_overhead_kprobe_kern.o
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always-y += parse_varlen.o parse_simple.o parse_ldabs.o
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always-y += test_cgrp2_tc_kern.o
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always-y += xdp1_kern.o
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always-y += xdp2_kern.o
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always-y += xdp_router_ipv4_kern.o
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always-y += test_current_task_under_cgroup_kern.o
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always-y += trace_event_kern.o
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always-y += sampleip_kern.o
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always-y += lwt_len_hist_kern.o
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always-y += xdp_tx_iptunnel_kern.o
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always-y += test_map_in_map_kern.o
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always-y += tcp_synrto_kern.o
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always-y += tcp_rwnd_kern.o
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always-y += tcp_bufs_kern.o
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always-y += tcp_cong_kern.o
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always-y += tcp_iw_kern.o
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always-y += tcp_clamp_kern.o
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always-y += tcp_basertt_kern.o
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always-y += tcp_tos_reflect_kern.o
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always-y += tcp_dumpstats_kern.o
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always-y += xdp_redirect_kern.o
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always-y += xdp_redirect_map_kern.o
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always-y += xdp_redirect_cpu_kern.o
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always-y += xdp_monitor_kern.o
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always-y += xdp_rxq_info_kern.o
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always-y += xdp2skb_meta_kern.o
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always-y += syscall_tp_kern.o
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always-y += cpustat_kern.o
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always-y += xdp_adjust_tail_kern.o
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always-y += xdp_fwd_kern.o
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always-y += task_fd_query_kern.o
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always-y += xdp_sample_pkts_kern.o
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always-y += ibumad_kern.o
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always-y += hbm_out_kern.o
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always-y += hbm_edt_kern.o
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always-y += xdpsock_kern.o
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ifeq ($(ARCH), arm)
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# Strip all except -D__LINUX_ARM_ARCH__ option needed to handle linux
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# headers when arm instruction set identification is requested.
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ARM_ARCH_SELECTOR := $(filter -D__LINUX_ARM_ARCH__%, $(KBUILD_CFLAGS))
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BPF_EXTRA_CFLAGS := $(ARM_ARCH_SELECTOR)
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TPROGS_CFLAGS += $(ARM_ARCH_SELECTOR)
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endif
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TPROGS_CFLAGS += -Wall -O2
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TPROGS_CFLAGS += -Wmissing-prototypes
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TPROGS_CFLAGS += -Wstrict-prototypes
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TPROGS_CFLAGS += -I$(objtree)/usr/include
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TPROGS_CFLAGS += -I$(srctree)/tools/testing/selftests/bpf/
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TPROGS_CFLAGS += -I$(srctree)/tools/lib/
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TPROGS_CFLAGS += -I$(srctree)/tools/include
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TPROGS_CFLAGS += -I$(srctree)/tools/perf
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TPROGS_CFLAGS += -DHAVE_ATTR_TEST=0
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ifdef SYSROOT
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TPROGS_CFLAGS += --sysroot=$(SYSROOT)
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TPROGS_LDFLAGS := -L$(SYSROOT)/usr/lib
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endif
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TPROGCFLAGS_bpf_load.o += -Wno-unused-variable
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TPROGS_LDLIBS += $(LIBBPF) -lelf -lz
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TPROGLDLIBS_tracex4 += -lrt
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TPROGLDLIBS_trace_output += -lrt
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TPROGLDLIBS_map_perf_test += -lrt
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TPROGLDLIBS_test_overhead += -lrt
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TPROGLDLIBS_xdpsock += -pthread
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TPROGLDLIBS_xsk_fwd += -pthread
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# Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline:
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# make M=samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang
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LLC ?= llc
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CLANG ?= clang
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OPT ?= opt
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LLVM_DIS ?= llvm-dis
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LLVM_OBJCOPY ?= llvm-objcopy
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BTF_PAHOLE ?= pahole
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# Detect that we're cross compiling and use the cross compiler
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ifdef CROSS_COMPILE
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CLANG_ARCH_ARGS = --target=$(notdir $(CROSS_COMPILE:%-=%))
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endif
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# Don't evaluate probes and warnings if we need to run make recursively
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ifneq ($(src),)
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HDR_PROBE := $(shell printf "\#include <linux/types.h>\n struct list_head { int a; }; int main() { return 0; }" | \
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$(CC) $(TPROGS_CFLAGS) $(TPROGS_LDFLAGS) -x c - \
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-o /dev/null 2>/dev/null && echo okay)
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ifeq ($(HDR_PROBE),)
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$(warning WARNING: Detected possible issues with include path.)
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$(warning WARNING: Please install kernel headers locally (make headers_install).)
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endif
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BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris)
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BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF)
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BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm')
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BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \
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$(CLANG) -target bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \
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readelf -S ./llvm_btf_verify.o | grep BTF; \
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/bin/rm -f ./llvm_btf_verify.o)
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BPF_EXTRA_CFLAGS += -fno-stack-protector
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ifneq ($(BTF_LLVM_PROBE),)
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BPF_EXTRA_CFLAGS += -g
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else
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ifneq ($(and $(BTF_LLC_PROBE),$(BTF_PAHOLE_PROBE),$(BTF_OBJCOPY_PROBE)),)
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BPF_EXTRA_CFLAGS += -g
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LLC_FLAGS += -mattr=dwarfris
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DWARF2BTF = y
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endif
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endif
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endif
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# Trick to allow make to be run from this directory
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all:
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$(MAKE) -C ../../ M=$(CURDIR) BPF_SAMPLES_PATH=$(CURDIR)
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clean:
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$(MAKE) -C ../../ M=$(CURDIR) clean
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@find $(CURDIR) -type f -name '*~' -delete
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$(LIBBPF): FORCE
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# Fix up variables inherited from Kbuild that tools/ build system won't like
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$(MAKE) -C $(dir $@) RM='rm -rf' EXTRA_CFLAGS="$(TPROGS_CFLAGS)" \
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LDFLAGS=$(TPROGS_LDFLAGS) srctree=$(BPF_SAMPLES_PATH)/../../ O=
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$(obj)/syscall_nrs.h: $(obj)/syscall_nrs.s FORCE
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$(call filechk,offsets,__SYSCALL_NRS_H__)
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targets += syscall_nrs.s
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clean-files += syscall_nrs.h
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FORCE:
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# Verify LLVM compiler tools are available and bpf target is supported by llc
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.PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC)
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verify_cmds: $(CLANG) $(LLC)
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@for TOOL in $^ ; do \
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if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \
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echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\
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exit 1; \
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else true; fi; \
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done
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verify_target_bpf: verify_cmds
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@if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \
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echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\
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echo " NOTICE: LLVM version >= 3.7.1 required" ;\
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exit 2; \
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else true; fi
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$(BPF_SAMPLES_PATH)/*.c: verify_target_bpf $(LIBBPF)
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$(src)/*.c: verify_target_bpf $(LIBBPF)
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$(obj)/tracex5_kern.o: $(obj)/syscall_nrs.h
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$(obj)/hbm_out_kern.o: $(src)/hbm.h $(src)/hbm_kern.h
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$(obj)/hbm.o: $(src)/hbm.h
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$(obj)/hbm_edt_kern.o: $(src)/hbm.h $(src)/hbm_kern.h
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-include $(BPF_SAMPLES_PATH)/Makefile.target
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# asm/sysreg.h - inline assembly used by it is incompatible with llvm.
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# But, there is no easy way to fix it, so just exclude it since it is
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# useless for BPF samples.
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# below we use long chain of commands, clang | opt | llvm-dis | llc,
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# to generate final object file. 'clang' compiles the source into IR
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# with native target, e.g., x64, arm64, etc. 'opt' does bpf CORE IR builtin
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# processing (llvm12) and IR optimizations. 'llvm-dis' converts
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# 'opt' output to IR, and finally 'llc' generates bpf byte code.
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$(obj)/%.o: $(src)/%.c
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@echo " CLANG-bpf " $@
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$(Q)$(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(BPF_EXTRA_CFLAGS) \
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-I$(obj) -I$(srctree)/tools/testing/selftests/bpf/ \
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-I$(srctree)/tools/lib/ \
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-D__KERNEL__ -D__BPF_TRACING__ -Wno-unused-value -Wno-pointer-sign \
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-D__TARGET_ARCH_$(SRCARCH) -Wno-compare-distinct-pointer-types \
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-Wno-gnu-variable-sized-type-not-at-end \
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-Wno-address-of-packed-member -Wno-tautological-compare \
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-Wno-unknown-warning-option $(CLANG_ARCH_ARGS) \
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-I$(srctree)/samples/bpf/ -include asm_goto_workaround.h \
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-O2 -emit-llvm -Xclang -disable-llvm-passes -c $< -o - | \
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$(OPT) -O2 -mtriple=bpf-pc-linux | $(LLVM_DIS) | \
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$(LLC) -march=bpf $(LLC_FLAGS) -filetype=obj -o $@
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ifeq ($(DWARF2BTF),y)
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$(BTF_PAHOLE) -J $@
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endif
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