From 155f556d64b1a48710f01305e14bb860734ed1e3 Mon Sep 17 00:00:00 2001 From: Rafael David Tinoco Date: Tue, 23 Mar 2021 01:09:52 -0300 Subject: libbpf: Add bpf object kern_version attribute setter Unfortunately some distros don't have their kernel version defined accurately in due to different long term support reasons. It is important to have a way to override the bpf kern_version attribute during runtime: some old kernels might still check for kern_version attribute during bpf_prog_load(). Signed-off-by: Rafael David Tinoco Signed-off-by: Alexei Starovoitov Acked-by: Andrii Nakryiko Acked-by: John Fastabend Link: https://lore.kernel.org/bpf/20210323040952.2118241-1-rafaeldtinoco@ubuntu.com --- tools/lib/bpf/libbpf.c | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'tools/lib/bpf/libbpf.c') diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index 10a0a67699f1..cebb0e852cf8 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -8270,6 +8270,16 @@ int bpf_object__btf_fd(const struct bpf_object *obj) return obj->btf ? btf__fd(obj->btf) : -1; } +int bpf_object__set_kversion(struct bpf_object *obj, __u32 kern_version) +{ + if (obj->loaded) + return -EINVAL; + + obj->kern_version = kern_version; + + return 0; +} + int bpf_object__set_priv(struct bpf_object *obj, void *priv, bpf_object_clear_priv_t clear_priv) { -- cgit v1.2.3-59-g8ed1b