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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>
This commit is contained in:
Maciej Fijalkowski 2019-02-01 22:42:28 +01:00 committed by Daniel Borkmann
parent 01dde20ce0
commit 743e568c15
10 changed files with 119 additions and 40 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
samples/bpf/xdp1_user.c
View File

@ -22,7 +22,7 @@
#include "bpf/libbpf.h"
static int ifindex;
static __u32 xdp_flags;
static __u32 xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST;
static void int_exit(int sig)
{
@ -63,7 +63,8 @@ static void usage(const char *prog)
"usage: %s [OPTS] IFACE\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);
}
@ -73,7 +74,7 @@ int main(int argc, char **argv)
struct bpf_prog_load_attr prog_load_attr = {
.prog_type = BPF_PROG_TYPE_XDP,
};
const char *optstr = "SN";
const char *optstr = "FSN";
int prog_fd, map_fd, opt;
struct bpf_object *obj;
struct bpf_map *map;
@ -87,6 +88,9 @@ 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;

8
samples/bpf/xdp_adjust_tail_user.c
View File

@ -24,7 +24,7 @@
#define STATS_INTERVAL_S 2U
static int ifindex = -1;
static __u32 xdp_flags;
static __u32 xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST;
static void int_exit(int sig)
{
@ -60,6 +60,7 @@ static void usage(const char *cmd)
printf(" -T <stop-after-X-seconds> Default: 0 (forever)\n");
printf(" -S use skb-mode\n");
printf(" -N enforce native mode\n");
printf(" -F force loading prog\n");
printf(" -h Display this help\n");
}
@ -70,8 +71,8 @@ int main(int argc, char **argv)
.prog_type = BPF_PROG_TYPE_XDP,
};
unsigned char opt_flags[256] = {};
const char *optstr = "i:T:SNFh";
unsigned int kill_after_s = 0;
const char *optstr = "i:T:SNh";
int i, prog_fd, map_fd, opt;
struct bpf_object *obj;
struct bpf_map *map;
@ -96,6 +97,9 @@ 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(argv[0]);
return 1;

8
samples/bpf/xdp_redirect_cpu_user.c
View File

@ -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:

10
samples/bpf/xdp_redirect_map_user.c
View File

@ -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);
}
@ -82,7 +83,7 @@ int main(int argc, char **argv)
};
struct bpf_program *prog, *dummy_prog;
int prog_fd, dummy_prog_fd;
const char *optstr = "SN";
const char *optstr = "FSN";
struct bpf_object *obj;
int ret, opt, key = 0;
char filename[256];
@ -96,6 +97,9 @@ 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;

10
samples/bpf/xdp_redirect_user.c
View File

@ -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;

50
samples/bpf/xdp_router_ipv4_user.c
View File

@ -26,8 +26,9 @@
#include "bpf_util.h"
#include "bpf/libbpf.h"
#include <sys/resource.h>
#include <libgen.h>
int sock, sock_arp, flags = 0;
int sock, sock_arp, flags = XDP_FLAGS_UPDATE_IF_NOEXIST;
static int total_ifindex;
int *ifindex_list;
char buf[8192];
@ -608,33 +609,56 @@ cleanup:
return ret;
}
static void usage(const char *prog)
{
fprintf(stderr,
"%s: %s [OPTS] interface name list\n\n"
"OPTS:\n"
" -S use skb-mode\n"
" -F force loading prog\n",
__func__, prog);
}
int main(int ac, char **argv)
{
struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
struct bpf_prog_load_attr prog_load_attr = {
.prog_type = BPF_PROG_TYPE_XDP,
};
const char *optstr = "SF";
struct bpf_object *obj;
char filename[256];
char **ifname_list;
int prog_fd;
int prog_fd, opt;
int i = 1;
snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
prog_load_attr.file = filename;
if (ac < 2) {
printf("usage: %s [-S] Interface name list\n", argv[0]);
return 1;
total_ifindex = ac - 1;
ifname_list = (argv + 1);
while ((opt = getopt(ac, argv, optstr)) != -1) {
switch (opt) {
case 'S':
flags |= XDP_FLAGS_SKB_MODE;
total_ifindex--;
ifname_list++;
break;
case 'F':
flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST;
total_ifindex--;
ifname_list++;
break;
default:
usage(basename(argv[0]));
return 1;
}
}
if (!strcmp(argv[1], "-S")) {
flags = XDP_FLAGS_SKB_MODE;
total_ifindex = ac - 2;
ifname_list = (argv + 2);
} else {
flags = 0;
total_ifindex = ac - 1;
ifname_list = (argv + 1);
if (optind == ac) {
usage(basename(argv[0]));
return 1;
}
if (setrlimit(RLIMIT_MEMLOCK, &r)) {

8
samples/bpf/xdp_rxq_info_user.c
View File

@ -30,7 +30,7 @@ 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 struct bpf_map *stats_global_map;
static struct bpf_map *rx_queue_index_map;
@ -52,6 +52,7 @@ static const struct option long_options[] = {
{"action", required_argument, NULL, 'a' },
{"readmem", no_argument, NULL, 'r' },
{"swapmac", no_argument, NULL, 'm' },
{"force", no_argument, NULL, 'F' },
{0, 0, NULL, 0 }
};
@ -487,7 +488,7 @@ int main(int argc, char **argv)
}
/* Parse commands line args */
while ((opt = getopt_long(argc, argv, "hSd:",
while ((opt = getopt_long(argc, argv, "FhSrmzd:s:a:",
long_options, &longindex)) != -1) {
switch (opt) {
case 'd':
@ -524,6 +525,9 @@ int main(int argc, char **argv)
case 'm':
cfg_options |= SWAP_MAC;
break;
case 'F':
xdp_flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST;
break;
case 'h':
error:
default:

40
samples/bpf/xdp_sample_pkts_user.c
View File

@ -13,6 +13,8 @@
#include <libbpf.h>
#include <bpf/bpf.h>
#include <sys/resource.h>
#include <libgen.h>
#include <linux/if_link.h>
#include "perf-sys.h"
#include "trace_helpers.h"
@ -21,12 +23,13 @@
static int pmu_fds[MAX_CPUS], if_idx;
static struct perf_event_mmap_page *headers[MAX_CPUS];
static char *if_name;
static __u32 xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST;
static int do_attach(int idx, int fd, const char *name)
{
int err;
err = bpf_set_link_xdp_fd(idx, fd, 0);
err = bpf_set_link_xdp_fd(idx, fd, xdp_flags);
if (err < 0)
printf("ERROR: failed to attach program to %s\n", name);
@ -98,21 +101,42 @@ static void sig_handler(int signo)
exit(0);
}
static void usage(const char *prog)
{
fprintf(stderr,
"%s: %s [OPTS] <ifname|ifindex>\n\n"
"OPTS:\n"
" -F force loading prog\n",
__func__, prog);
}
int main(int argc, char **argv)
{
struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
struct bpf_prog_load_attr prog_load_attr = {
.prog_type = BPF_PROG_TYPE_XDP,
};
const char *optstr = "F";
int prog_fd, map_fd, opt;
struct bpf_object *obj;
struct bpf_map *map;
int prog_fd, map_fd;
char filename[256];
int ret, err, i;
int numcpus;
if (argc < 2) {
printf("Usage: %s <ifname>\n", argv[0]);
while ((opt = getopt(argc, argv, optstr)) != -1) {
switch (opt) {
case 'F':
xdp_flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST;
break;
default:
usage(basename(argv[0]));
return 1;
}
}
if (optind == argc) {
usage(basename(argv[0]));
return 1;
}
@ -143,16 +167,16 @@ int main(int argc, char **argv)
}
map_fd = bpf_map__fd(map);
if_idx = if_nametoindex(argv[1]);
if_idx = if_nametoindex(argv[optind]);
if (!if_idx)
if_idx = strtoul(argv[1], NULL, 0);
if_idx = strtoul(argv[optind], NULL, 0);
if (!if_idx) {
fprintf(stderr, "Invalid ifname\n");
return 1;
}
if_name = argv[1];
err = do_attach(if_idx, prog_fd, argv[1]);
if_name = argv[optind];
err = do_attach(if_idx, prog_fd, if_name);
if (err)
return err;

8
samples/bpf/xdp_tx_iptunnel_user.c
View File

@ -25,7 +25,7 @@
#define STATS_INTERVAL_S 2U
static int ifindex = -1;
static __u32 xdp_flags = 0;
static __u32 xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST;
static int rxcnt_map_fd;
static void int_exit(int sig)
@ -83,6 +83,7 @@ static void usage(const char *cmd)
printf(" -P <IP-Protocol> Default is TCP\n");
printf(" -S use skb-mode\n");
printf(" -N enforce native mode\n");
printf(" -F Force loading the XDP prog\n");
printf(" -h Display this help\n");
}
@ -145,7 +146,7 @@ int main(int argc, char **argv)
};
struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
int min_port = 0, max_port = 0, vip2tnl_map_fd;
const char *optstr = "i:a:p:s:d:m:T:P:SNh";
const char *optstr = "i:a:p:s:d:m:T:P:FSNh";
unsigned char opt_flags[256] = {};
unsigned int kill_after_s = 0;
struct iptnl_info tnl = {};
@ -217,6 +218,9 @@ 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(argv[0]);
return 1;

7
samples/bpf/xdpsock_user.c
View File

@ -68,7 +68,7 @@ enum benchmark_type {
};
static enum benchmark_type opt_bench = BENCH_RXDROP;
static u32 opt_xdp_flags;
static u32 opt_xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST;
static const char *opt_if = "";
static int opt_ifindex;
static int opt_queue;
@ -682,7 +682,7 @@ static void parse_command_line(int argc, char **argv)
opterr = 0;
for (;;) {
c = getopt_long(argc, argv, "rtli:q:psSNn:cz", long_options,
c = getopt_long(argc, argv, "Frtli:q:psSNn:cz", long_options,
&option_index);
if (c == -1)
break;
@ -725,6 +725,9 @@ static void parse_command_line(int argc, char **argv)
case 'c':
opt_xdp_bind_flags |= XDP_COPY;
break;
case 'F':
opt_xdp_flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST;
break;
default:
usage(basename(argv[0]));
}