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authorMaciej Fijalkowski <maciejromanfijalkowski@gmail.com>2019-02-01 22:42:28 +0100
committerDaniel Borkmann <daniel@iogearbox.net>2019-02-01 23:37:51 +0100
commit743e568c15860d4061202f73214c106a5bb0890b (patch)
treef9970c7cb340abbc687848b8e5cfeb7db8da22bf /samples/bpf/xdp_redirect_cpu_user.c
parent01dde20ce04b3a18f1e91d6d1ee0ef484d20bbf2 (diff)
downloadlinux-stericsson-743e568c15860d4061202f73214c106a5bb0890b.tar.gz
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_cpu_user.c')
-rw-r--r--samples/bpf/xdp_redirect_cpu_user.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/samples/bpf/xdp_redirect_cpu_user.c b/samples/bpf/xdp_redirect_cpu_user.c
index 8645ddc2da0e..0224afb55845 100644
--- a/samples/bpf/xdp_redirect_cpu_user.c
+++ b/samples/bpf/xdp_redirect_cpu_user.c
@@ -33,7 +33,7 @@ static int ifindex = -1;
static char ifname_buf[IF_NAMESIZE];
static char *ifname;
-static __u32 xdp_flags;
+static __u32 xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST;
static int cpu_map_fd;
static int rx_cnt_map_fd;
static int redirect_err_cnt_map_fd;
@@ -62,6 +62,7 @@ static const struct option long_options[] = {
{"cpu", required_argument, NULL, 'c' },
{"stress-mode", no_argument, NULL, 'x' },
{"no-separators", no_argument, NULL, 'z' },
+ {"force", no_argument, NULL, 'F' },
{0, 0, NULL, 0 }
};
@@ -651,7 +652,7 @@ int main(int argc, char **argv)
mark_cpus_unavailable();
/* Parse commands line args */
- while ((opt = getopt_long(argc, argv, "hSd:",
+ while ((opt = getopt_long(argc, argv, "hSd:s:p:q:c:xzF",
long_options, &longindex)) != -1) {
switch (opt) {
case 'd':
@@ -700,6 +701,9 @@ int main(int argc, char **argv)
case 'q':
qsize = atoi(optarg);
break;
+ case 'F':
+ xdp_flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST;
+ break;
case 'h':
error:
default: