From 743e568c15860d4061202f73214c106a5bb0890b Mon Sep 17 00:00:00 2001 From: Maciej Fijalkowski Date: Fri, 1 Feb 2019 22:42:28 +0100 Subject: [PATCH] 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 Reviewed-by: Jakub Kicinski Acked-by: John Fastabend Signed-off-by: Daniel Borkmann --- samples/bpf/xdp1_user.c | 10 ++++-- samples/bpf/xdp_adjust_tail_user.c | 8 +++-- samples/bpf/xdp_redirect_cpu_user.c | 8 +++-- samples/bpf/xdp_redirect_map_user.c | 10 ++++-- samples/bpf/xdp_redirect_user.c | 10 ++++-- samples/bpf/xdp_router_ipv4_user.c | 50 +++++++++++++++++++++-------- samples/bpf/xdp_rxq_info_user.c | 8 +++-- samples/bpf/xdp_sample_pkts_user.c | 40 ++++++++++++++++++----- samples/bpf/xdp_tx_iptunnel_user.c | 8 +++-- samples/bpf/xdpsock_user.c | 7 ++-- 10 files changed, 119 insertions(+), 40 deletions(-) diff --git a/samples/bpf/xdp1_user.c b/samples/bpf/xdp1_user.c index 8bfda95c77ad..505bce207165 100644 --- a/samples/bpf/xdp1_user.c +++ b/samples/bpf/xdp1_user.c @@ -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; diff --git a/samples/bpf/xdp_adjust_tail_user.c b/samples/bpf/xdp_adjust_tail_user.c index 3042ce37dae8..049bddf7778b 100644 --- a/samples/bpf/xdp_adjust_tail_user.c +++ b/samples/bpf/xdp_adjust_tail_user.c @@ -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 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; 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: diff --git a/samples/bpf/xdp_redirect_map_user.c b/samples/bpf/xdp_redirect_map_user.c index 60d46eea225b..470e1a7e8810 100644 --- a/samples/bpf/xdp_redirect_map_user.c +++ b/samples/bpf/xdp_redirect_map_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); } @@ -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; 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; diff --git a/samples/bpf/xdp_router_ipv4_user.c b/samples/bpf/xdp_router_ipv4_user.c index c63c6beec7d6..208d6a996478 100644 --- a/samples/bpf/xdp_router_ipv4_user.c +++ b/samples/bpf/xdp_router_ipv4_user.c @@ -26,8 +26,9 @@ #include "bpf_util.h" #include "bpf/libbpf.h" #include +#include -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 @@ static int monitor_route(void) 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)) { diff --git a/samples/bpf/xdp_rxq_info_user.c b/samples/bpf/xdp_rxq_info_user.c index ef26f882f92f..e7a98c2a440f 100644 --- a/samples/bpf/xdp_rxq_info_user.c +++ b/samples/bpf/xdp_rxq_info_user.c @@ -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: diff --git a/samples/bpf/xdp_sample_pkts_user.c b/samples/bpf/xdp_sample_pkts_user.c index 5f5828ee0761..62f34827c775 100644 --- a/samples/bpf/xdp_sample_pkts_user.c +++ b/samples/bpf/xdp_sample_pkts_user.c @@ -13,6 +13,8 @@ #include #include #include +#include +#include #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] \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 \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; diff --git a/samples/bpf/xdp_tx_iptunnel_user.c b/samples/bpf/xdp_tx_iptunnel_user.c index 5093d8220da5..e3de60930d27 100644 --- a/samples/bpf/xdp_tx_iptunnel_user.c +++ b/samples/bpf/xdp_tx_iptunnel_user.c @@ -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 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; diff --git a/samples/bpf/xdpsock_user.c b/samples/bpf/xdpsock_user.c index 57ecadc58403..188723784768 100644 --- a/samples/bpf/xdpsock_user.c +++ b/samples/bpf/xdpsock_user.c @@ -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])); } -- GitLab