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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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4
tools/lib/bpf/libbpf.h
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@@ -42,6 +42,8 @@ enum libbpf_errno {
LIBBPF_ERRNO__PROG2BIG, /* Program too big */
LIBBPF_ERRNO__KVER, /* Incorrect kernel version */
LIBBPF_ERRNO__PROGTYPE, /* Kernel doesn't support this program type */
LIBBPF_ERRNO__WRNGPID, /* Wrong pid in netlink message */
LIBBPF_ERRNO__INVSEQ, /* Invalid netlink sequence */
__LIBBPF_ERRNO__END,
};
@@ -246,4 +248,6 @@ long libbpf_get_error(const void *ptr);
int bpf_prog_load(const char *file, enum bpf_prog_type type,
struct bpf_object **pobj, int *prog_fd);
int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags);
#endif