libbpf: add function to setup XDP

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>

1 files changed, 2 insertions, 0 deletions

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 30c776375118..c60122d3ea85 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -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)