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bpf: iterators: Build and use lightweight bootstrap version of bpftool

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kernel/bpf/preload/iterators use bpftool for vmlinux.h, skeleton, and
static linking only. So we can use lightweight bootstrap version of
bpftool to handle these, and it will be faster.

Suggested-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Pu Lehui <pulehui@huawei.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20220714024612.944071-4-pulehui@huawei.com
This commit is contained in:
Pu Lehui 2022-07-14 10:46:12 +08:00 committed by Andrii Nakryiko
parent 3a2a58c447
commit 3848636b4a
1 changed files with 3 additions and 7 deletions
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10
kernel/bpf/preload/iterators/Makefile
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@ -9,7 +9,7 @@ LLVM_STRIP ?= llvm-strip
TOOLS_PATH := $(abspath ../../../../tools) TOOLS_PATH := $(abspath ../../../../tools)
BPFTOOL_SRC := $(TOOLS_PATH)/bpf/bpftool BPFTOOL_SRC := $(TOOLS_PATH)/bpf/bpftool
BPFTOOL_OUTPUT := $(abs_out)/bpftool BPFTOOL_OUTPUT := $(abs_out)/bpftool
DEFAULT_BPFTOOL := $(OUTPUT)/sbin/bpftool DEFAULT_BPFTOOL := $(BPFTOOL_OUTPUT)/bootstrap/bpftool
BPFTOOL ?= $(DEFAULT_BPFTOOL) BPFTOOL ?= $(DEFAULT_BPFTOOL)
LIBBPF_SRC := $(TOOLS_PATH)/lib/bpf LIBBPF_SRC := $(TOOLS_PATH)/lib/bpf
@ -61,9 +61,5 @@ $(BPFOBJ): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(LIBBPF_OU
OUTPUT=$(abspath $(dir $@))/ prefix= \ OUTPUT=$(abspath $(dir $@))/ prefix= \
DESTDIR=$(LIBBPF_DESTDIR) $(abspath $@) install_headers DESTDIR=$(LIBBPF_DESTDIR) $(abspath $@) install_headers
$(DEFAULT_BPFTOOL): $(BPFOBJ) | $(BPFTOOL_OUTPUT) $(DEFAULT_BPFTOOL): | $(BPFTOOL_OUTPUT)
$(Q)$(MAKE) $(submake_extras) -C $(BPFTOOL_SRC) \ $(Q)$(MAKE) $(submake_extras) -C $(BPFTOOL_SRC) OUTPUT=$(BPFTOOL_OUTPUT)/ bootstrap
OUTPUT=$(BPFTOOL_OUTPUT)/ \
LIBBPF_OUTPUT=$(LIBBPF_OUTPUT)/ \
LIBBPF_DESTDIR=$(LIBBPF_DESTDIR)/ \
prefix= DESTDIR=$(abs_out)/ install-bin