diff options
| author | Maciej Fijalkowski <maciejromanfijalkowski@gmail.com> | 2019-02-01 22:42:28 +0100 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2019-02-01 23:37:51 +0100 |
| commit | 743e568c15860d4061202f73214c106a5bb0890b (patch) | |
| tree | f9970c7cb340abbc687848b8e5cfeb7db8da22bf /samples/bpf/xdp_redirect_user.c | |
| parent | 01dde20ce04b3a18f1e91d6d1ee0ef484d20bbf2 (diff) | |
samples/bpf: Add a "force" flag to XDP samples
Make xdp samples consistent with iproute2 behavior and set the
XDP_FLAGS_UPDATE_IF_NOEXIST by default when setting the xdp program on
interface. Provide an option for user to force the program loading,
which as a result will not include the mentioned flag in
bpf_set_link_xdp_fd call.
Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'samples/bpf/xdp_redirect_user.c')
| -rw-r--r-- | samples/bpf/xdp_redirect_user.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/samples/bpf/xdp_redirect_user.c b/samples/bpf/xdp_redirect_user.c index 93404820df68..be6058cda97c 100644 --- a/samples/bpf/xdp_redirect_user.c +++ b/samples/bpf/xdp_redirect_user.c @@ -30,7 +30,7 @@ static int ifindex_in; static int ifindex_out; static bool ifindex_out_xdp_dummy_attached = true; -static __u32 xdp_flags; +static __u32 xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST; static int rxcnt_map_fd; static void int_exit(int sig) @@ -70,7 +70,8 @@ static void usage(const char *prog) "usage: %s [OPTS] IFINDEX_IN IFINDEX_OUT\n\n" "OPTS:\n" " -S use skb-mode\n" - " -N enforce native mode\n", + " -N enforce native mode\n" + " -F force loading prog\n", prog); } @@ -83,7 +84,7 @@ int main(int argc, char **argv) }; struct bpf_program *prog, *dummy_prog; int prog_fd, tx_port_map_fd, opt; - const char *optstr = "SN"; + const char *optstr = "FSN"; struct bpf_object *obj; char filename[256]; int dummy_prog_fd; @@ -97,6 +98,9 @@ int main(int argc, char **argv) case 'N': xdp_flags |= XDP_FLAGS_DRV_MODE; break; + case 'F': + xdp_flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST; + break; default: usage(basename(argv[0])); return 1; |