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authorRong Tao <rongtao@cestc.cn>2022-11-05 09:48:00 +0300
committerAndrii Nakryiko <andrii@kernel.org>2022-11-08 04:13:35 +0300
commite5659e4e19e49f1eac58bb07ce8bc2d78a89fe65 (patch)
tree48fd4f7279c5948d2f489a45e60d4a73db0f7f5e /tools/perf
parente8f50c4f0c14214b6430b8b3493654a286681a2b (diff)
downloadlinux-e5659e4e19e49f1eac58bb07ce8bc2d78a89fe65.tar.xz
samples/bpf: Fix sockex3 error: Missing BPF prog type
since commit 450b167fb9be("libbpf: clean up SEC() handling"), sec_def_matches() does not recognize "socket/xxx" as "socket", therefore, the BPF program type is not recognized. Instead of sockex3_user.c parsing section names to get the BPF program fd. We use the program array map to assign a static index to each BPF program (get inspired by selftests/bpf progs/test_prog_array_init.c). Therefore, use SEC("socket") as section name instead of SEC("socket/xxx"), so that the BPF program is parsed to SOCKET_FILTER type. The "missing BPF prog type" problem is solved. How to reproduce this error: $ cd samples/bpf $ sudo ./sockex3 libbpf: prog 'bpf_func_PARSE_IP': missing BPF prog type, check ELF section name 'socket/3' libbpf: prog 'bpf_func_PARSE_IP': failed to load: -22 libbpf: failed to load object './sockex3_kern.o' ERROR: loading BPF object file failed Signed-off-by: Rong Tao <rongtao@cestc.cn> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/tencent_EBA3C18864069E42175946973C2ACBAF5408@qq.com
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