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libbpf: add function to setup XDP

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Most of the code is taken from set_link_xdp_fd() in bpf_load.c and
slightly modified to be library compliant.

Signed-off-by: Eric Leblond <eric@regit.org>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Eric Leblond 2018-01-30 21:55:01 +01:00 • committed by Alexei Starovoitov
parent dc2b9f19e3
commit 949abbe884
3 changed files with 128 additions and 0 deletions
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tools/lib/bpf/libbpf.c
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@ -106,6 +106,8 @@ static const char *libbpf_strerror_table[NR_ERRNO] = {
[ERRCODE_OFFSET(PROG2BIG)] = "Program too big",
[ERRCODE_OFFSET(KVER)] = "Incorrect kernel version",
[ERRCODE_OFFSET(PROGTYPE)] = "Kernel doesn't support this program type",
[ERRCODE_OFFSET(WRNGPID)] = "Wrong pid in netlink message",
[ERRCODE_OFFSET(INVSEQ)] = "Invalid netlink sequence",
};
int libbpf_strerror(int err, char *buf, size_t size)