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Message-ID: <20230526150921.338906-1-mtottenh@akamai.com> Date: Fri, 26 May 2023 11:09:20 -0400 From: Max Tottenham <mtottenh@...mai.com> To: <netdev@...r.kernel.org> CC: <stephen@...workplumber.org>, <johunt@...mai.com>, Max Tottenham <mtottenh@...mai.com> Subject: [RFC PATCH v2 iproute2 0/1] Add ability to specify eBPF map pin path We have a use case where we have several different applications composed of sets of eBPF programs (programs that may be attached at the TC/XDP layers), that need to share maps and not conflict with each other. For XDP based programs, we are using the xdp-loader from the xdp-tools project[1], it exposes an option to set the 'pin-path' for a given program. However, programs loaded via tc don't appear to have that ability, all I have found is the use of LIBBPF_PIN_BY_NAME or the older PIN_OBJECT_NS/PIN_GLOBAL_NS, but those don't let the user specify the path. I've whipped up a quick patch to be able to pass along a 'pin_path' similar to the xdp-loader. I don't know if this is the *right* approach so I'm more than happy to be pointed in the right direction. Thanks Max [1] https://github.com/xdp-project/xdp-tools/tree/master/xdp-loader Changes since V1: * Remove debug code. * Update man page. Max Tottenham (1): tc/f_bpf.c: Add ability to specify eBPF map pin path include/bpf_util.h | 1 + lib/bpf_legacy.c | 11 +++++++++-- lib/bpf_libbpf.c | 14 +++++++------- man/man8/tc-bpf.8 | 8 ++++++++ tc/f_bpf.c | 4 +++- 5 files changed, 28 insertions(+), 10 deletions(-) -- 2.25.1
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