diff options
Diffstat (limited to 'samples/bpf')
| -rw-r--r-- | samples/bpf/Makefile | 5 | ||||
| -rw-r--r-- | samples/bpf/xdp_redirect_map_multi_user.c | 345 | ||||
| -rw-r--r-- | samples/bpf/xdp_sample_user.c | 2 | ||||
| -rw-r--r-- | samples/bpf/xdp_sample_user.h | 21 |
4 files changed, 153 insertions, 220 deletions
diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile index 2b3d9e39c4f3..4dc20be5fb96 100644 --- a/samples/bpf/Makefile +++ b/samples/bpf/Makefile @@ -39,7 +39,6 @@ tprogs-y += lwt_len_hist tprogs-y += xdp_tx_iptunnel tprogs-y += test_map_in_map tprogs-y += per_socket_stats_example -tprogs-y += xdp_redirect_map_multi tprogs-y += xdp_rxq_info tprogs-y += syscall_tp tprogs-y += cpustat @@ -54,6 +53,7 @@ tprogs-y += ibumad tprogs-y += hbm tprogs-y += xdp_redirect_cpu +tprogs-y += xdp_redirect_map_multi tprogs-y += xdp_redirect_map tprogs-y += xdp_redirect tprogs-y += xdp_monitor @@ -100,7 +100,6 @@ lwt_len_hist-objs := lwt_len_hist_user.o xdp_tx_iptunnel-objs := xdp_tx_iptunnel_user.o test_map_in_map-objs := test_map_in_map_user.o per_socket_stats_example-objs := cookie_uid_helper_example.o -xdp_redirect_map_multi-objs := xdp_redirect_map_multi_user.o xdp_rxq_info-objs := xdp_rxq_info_user.o syscall_tp-objs := syscall_tp_user.o cpustat-objs := cpustat_user.o @@ -114,6 +113,7 @@ xdp_sample_pkts-objs := xdp_sample_pkts_user.o ibumad-objs := ibumad_user.o hbm-objs := hbm.o $(CGROUP_HELPERS) +xdp_redirect_map_multi-objs := xdp_redirect_map_multi_user.o $(XDP_SAMPLE) xdp_redirect_cpu-objs := xdp_redirect_cpu_user.o $(XDP_SAMPLE) xdp_redirect_map-objs := xdp_redirect_map_user.o $(XDP_SAMPLE) xdp_redirect-objs := xdp_redirect_user.o $(XDP_SAMPLE) @@ -310,6 +310,7 @@ $(BPF_SAMPLES_PATH)/*.c: verify_target_bpf $(LIBBPF) $(src)/*.c: verify_target_bpf $(LIBBPF) $(obj)/xdp_redirect_cpu_user.o: $(obj)/xdp_redirect_cpu.skel.h +$(obj)/xdp_redirect_map_multi_user.o: $(obj)/xdp_redirect_map_multi.skel.h $(obj)/xdp_redirect_map_user.o: $(obj)/xdp_redirect_map.skel.h $(obj)/xdp_redirect_user.o: $(obj)/xdp_redirect.skel.h $(obj)/xdp_monitor_user.o: $(obj)/xdp_monitor.skel.h diff --git a/samples/bpf/xdp_redirect_map_multi_user.c b/samples/bpf/xdp_redirect_map_multi_user.c index 84cdbbed20b7..315314716121 100644 --- a/samples/bpf/xdp_redirect_map_multi_user.c +++ b/samples/bpf/xdp_redirect_map_multi_user.c @@ -1,7 +1,12 @@ // SPDX-License-Identifier: GPL-2.0 +static const char *__doc__ = +"XDP multi redirect tool, using BPF_MAP_TYPE_DEVMAP and BPF_F_BROADCAST flag for bpf_redirect_map\n" +"Usage: xdp_redirect_map_multi <IFINDEX|IFNAME> <IFINDEX|IFNAME> ... <IFINDEX|IFNAME>\n"; + #include <linux/bpf.h> #include <linux/if_link.h> #include <assert.h> +#include <getopt.h> #include <errno.h> #include <signal.h> #include <stdio.h> @@ -15,106 +20,54 @@ #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> - -#include "bpf_util.h" +#include <linux/if_ether.h> #include <bpf/bpf.h> #include <bpf/libbpf.h> +#include "bpf_util.h" +#include "xdp_sample_user.h" +#include "xdp_redirect_map_multi.skel.h" #define MAX_IFACE_NUM 32 - -static __u32 xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST; static int ifaces[MAX_IFACE_NUM] = {}; -static int rxcnt_map_fd; - -static void int_exit(int sig) -{ - __u32 prog_id = 0; - int i; - - for (i = 0; ifaces[i] > 0; i++) { - if (bpf_get_link_xdp_id(ifaces[i], &prog_id, xdp_flags)) { - printf("bpf_get_link_xdp_id failed\n"); - exit(1); - } - if (prog_id) - bpf_set_link_xdp_fd(ifaces[i], -1, xdp_flags); - } - - exit(0); -} - -static void poll_stats(int interval) -{ - unsigned int nr_cpus = bpf_num_possible_cpus(); - __u64 values[nr_cpus], prev[nr_cpus]; - - memset(prev, 0, sizeof(prev)); - - while (1) { - __u64 sum = 0; - __u32 key = 0; - int i; - sleep(interval); - assert(bpf_map_lookup_elem(rxcnt_map_fd, &key, values) == 0); - for (i = 0; i < nr_cpus; i++) - sum += (values[i] - prev[i]); - if (sum) - printf("Forwarding %10llu pkt/s\n", sum / interval); - memcpy(prev, values, sizeof(values)); - } -} - -static int get_mac_addr(unsigned int ifindex, void *mac_addr) -{ - char ifname[IF_NAMESIZE]; - struct ifreq ifr; - int fd, ret = -1; - - fd = socket(AF_INET, SOCK_DGRAM, 0); - if (fd < 0) - return ret; - - if (!if_indextoname(ifindex, ifname)) - goto err_out; - - strcpy(ifr.ifr_name, ifname); +static int mask = SAMPLE_RX_CNT | SAMPLE_REDIRECT_ERR_MAP_CNT | + SAMPLE_EXCEPTION_CNT | SAMPLE_DEVMAP_XMIT_CNT | + SAMPLE_DEVMAP_XMIT_CNT_MULTI | SAMPLE_SKIP_HEADING; - if (ioctl(fd, SIOCGIFHWADDR, &ifr) != 0) - goto err_out; +DEFINE_SAMPLE_INIT(xdp_redirect_map_multi); - memcpy(mac_addr, ifr.ifr_hwaddr.sa_data, 6 * sizeof(char)); - ret = 0; +static const struct option long_options[] = { + { "help", no_argument, NULL, 'h' }, + { "skb-mode", no_argument, NULL, 'S' }, + { "force", no_argument, NULL, 'F' }, + { "load-egress", no_argument, NULL, 'X' }, + { "stats", no_argument, NULL, 's' }, + { "interval", required_argument, NULL, 'i' }, + { "verbose", no_argument, NULL, 'v' }, + {} +}; -err_out: - close(fd); - return ret; -} - -static int update_mac_map(struct bpf_object *obj) +static int update_mac_map(struct bpf_map *map) { - int i, ret = -1, mac_map_fd; + int mac_map_fd = bpf_map__fd(map); unsigned char mac_addr[6]; unsigned int ifindex; - - mac_map_fd = bpf_object__find_map_fd_by_name(obj, "mac_map"); - if (mac_map_fd < 0) { - printf("find mac map fd failed\n"); - return ret; - } + int i, ret = -1; for (i = 0; ifaces[i] > 0; i++) { ifindex = ifaces[i]; ret = get_mac_addr(ifindex, mac_addr); if (ret < 0) { - printf("get interface %d mac failed\n", ifindex); + fprintf(stderr, "get interface %d mac failed\n", + ifindex); return ret; } ret = bpf_map_update_elem(mac_map_fd, &ifindex, mac_addr, 0); - if (ret) { - perror("bpf_update_elem mac_map_fd"); + if (ret < 0) { + fprintf(stderr, "Failed to update mac address for ifindex %d\n", + ifindex); return ret; } } @@ -122,181 +75,159 @@ static int update_mac_map(struct bpf_object *obj) return 0; } -static void usage(const char *prog) -{ - fprintf(stderr, - "usage: %s [OPTS] <IFNAME|IFINDEX> <IFNAME|IFINDEX> ...\n" - "OPTS:\n" - " -S use skb-mode\n" - " -N enforce native mode\n" - " -F force loading prog\n" - " -X load xdp program on egress\n", - prog); -} - int main(int argc, char **argv) { - int i, ret, opt, forward_map_fd, max_ifindex = 0; - struct bpf_program *ingress_prog, *egress_prog; - int ingress_prog_fd, egress_prog_fd = 0; - struct bpf_devmap_val devmap_val; - bool attach_egress_prog = false; + struct bpf_devmap_val devmap_val = {}; + struct xdp_redirect_map_multi *skel; + struct bpf_program *ingress_prog; + bool xdp_devmap_attached = false; + struct bpf_map *forward_map; + int ret = EXIT_FAIL_OPTION; + unsigned long interval = 2; char ifname[IF_NAMESIZE]; - struct bpf_map *mac_map; - struct bpf_object *obj; unsigned int ifindex; - char filename[256]; - - while ((opt = getopt(argc, argv, "SNFX")) != -1) { + bool generic = false; + bool force = false; + bool tried = false; + bool error = true; + int i, opt; + + while ((opt = getopt_long(argc, argv, "hSFXi:vs", + long_options, NULL)) != -1) { switch (opt) { case 'S': - xdp_flags |= XDP_FLAGS_SKB_MODE; - break; - case 'N': - /* default, set below */ + generic = true; + /* devmap_xmit tracepoint not available */ + mask &= ~(SAMPLE_DEVMAP_XMIT_CNT | + SAMPLE_DEVMAP_XMIT_CNT_MULTI); break; case 'F': - xdp_flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST; + force = true; break; case 'X': - attach_egress_prog = true; + xdp_devmap_attached = true; + break; + case 'i': + interval = strtoul(optarg, NULL, 0); + break; + case 'v': + sample_switch_mode(); break; + case 's': + mask |= SAMPLE_REDIRECT_MAP_CNT; + break; + case 'h': + error = false; default: - usage(basename(argv[0])); - return 1; + sample_usage(argv, long_options, __doc__, mask, error); + return ret; } } - if (!(xdp_flags & XDP_FLAGS_SKB_MODE)) { - xdp_flags |= XDP_FLAGS_DRV_MODE; - } else if (attach_egress_prog) { - printf("Load xdp program on egress with SKB mode not supported yet\n"); - return 1; + if (argc <= optind + 1) { + sample_usage(argv, long_options, __doc__, mask, error); + return ret; } - if (optind == argc) { - printf("usage: %s <IFNAME|IFINDEX> <IFNAME|IFINDEX> ...\n", argv[0]); - return 1; + skel = xdp_redirect_map_multi__open(); + if (!skel) { + fprintf(stderr, "Failed to xdp_redirect_map_multi__open: %s\n", + strerror(errno)); + ret = EXIT_FAIL_BPF; + goto end; } - printf("Get interfaces"); + ret = sample_init_pre_load(skel); + if (ret < 0) { + fprintf(stderr, "Failed to sample_init_pre_load: %s\n", strerror(-ret)); + ret = EXIT_FAIL_BPF; + goto end_destroy; + } + + ret = EXIT_FAIL_OPTION; for (i = 0; i < MAX_IFACE_NUM && argv[optind + i]; i++) { ifaces[i] = if_nametoindex(argv[optind + i]); if (!ifaces[i]) ifaces[i] = strtoul(argv[optind + i], NULL, 0); if (!if_indextoname(ifaces[i], ifname)) { - perror("Invalid interface name or i"); - return 1; + fprintf(stderr, "Bad interface index or name\n"); + sample_usage(argv, long_options, __doc__, mask, true); + goto end_destroy; } - /* Find the largest index number */ - if (ifaces[i] > max_ifindex) - max_ifindex = ifaces[i]; - - printf(" %d", ifaces[i]); - } - printf("\n"); - - snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); - - obj = bpf_object__open(filename); - if (libbpf_get_error(obj)) { - printf("ERROR: opening BPF object file failed\n"); - obj = NULL; - goto err_out; + skel->rodata->from_match[i] = ifaces[i]; + skel->rodata->to_match[i] = ifaces[i]; } - /* Reset the map size to max ifindex + 1 */ - if (attach_egress_prog) { - mac_map = bpf_object__find_map_by_name(obj, "mac_map"); - ret = bpf_map__resize(mac_map, max_ifindex + 1); - if (ret < 0) { - printf("ERROR: reset mac map size failed\n"); - goto err_out; - } + ret = xdp_redirect_map_multi__load(skel); + if (ret < 0) { + fprintf(stderr, "Failed to xdp_redirect_map_multi__load: %s\n", + strerror(errno)); + ret = EXIT_FAIL_BPF; + goto end_destroy; } - /* load BPF program */ - if (bpf_object__load(obj)) { - printf("ERROR: loading BPF object file failed\n"); - goto err_out; - } - - if (xdp_flags & XDP_FLAGS_SKB_MODE) { - ingress_prog = bpf_object__find_program_by_name(obj, "xdp_redirect_map_general"); - forward_map_fd = bpf_object__find_map_fd_by_name(obj, "forward_map_general"); - } else { - ingress_prog = bpf_object__find_program_by_name(obj, "xdp_redirect_map_native"); - forward_map_fd = bpf_object__find_map_fd_by_name(obj, "forward_map_native"); - } - if (!ingress_prog || forward_map_fd < 0) { - printf("finding ingress_prog/forward_map in obj file failed\n"); - goto err_out; - } - - ingress_prog_fd = bpf_program__fd(ingress_prog); - if (ingress_prog_fd < 0) { - printf("find ingress_prog fd failed\n"); - goto err_out; - } - - rxcnt_map_fd = bpf_object__find_map_fd_by_name(obj, "rxcnt"); - if (rxcnt_map_fd < 0) { - printf("bpf_object__find_map_fd_by_name failed\n"); - goto err_out; - } - - if (attach_egress_prog) { + if (xdp_devmap_attached) { /* Update mac_map with all egress interfaces' mac addr */ - if (update_mac_map(obj) < 0) { - printf("Error: update mac map failed"); - goto err_out; + if (update_mac_map(skel->maps.mac_map) < 0) { + fprintf(stderr, "Updating mac address failed\n"); + ret = EXIT_FAIL; + goto end_destroy; } + } - /* Find egress prog fd */ - egress_prog = bpf_object__find_program_by_name(obj, "xdp_devmap_prog"); - if (!egress_prog) { - printf("finding egress_prog in obj file failed\n"); - goto err_out; - } - egress_prog_fd = bpf_program__fd(egress_prog); - if (egress_prog_fd < 0) { - printf("find egress_prog fd failed\n"); - goto err_out; - } + ret = sample_init(skel, mask); + if (ret < 0) { + fprintf(stderr, "Failed to initialize sample: %s\n", strerror(-ret)); + ret = EXIT_FAIL; + goto end_destroy; } - /* Remove attached program when program is interrupted or killed */ - signal(SIGINT, int_exit); - signal(SIGTERM, int_exit); + ingress_prog = skel->progs.xdp_redirect_map_native; + forward_map = skel->maps.forward_map_native; - /* Init forward multicast groups */ for (i = 0; ifaces[i] > 0; i++) { ifindex = ifaces[i]; + ret = EXIT_FAIL_XDP; +restart: /* bind prog_fd to each interface */ - ret = bpf_set_link_xdp_fd(ifindex, ingress_prog_fd, xdp_flags); - if (ret) { - printf("Set xdp fd failed on %d\n", ifindex); - goto err_out; + if (sample_install_xdp(ingress_prog, ifindex, generic, force) < 0) { + if (generic && !tried) { + fprintf(stderr, + "Trying fallback to sizeof(int) as value_size for devmap in generic mode\n"); + ingress_prog = skel->progs.xdp_redirect_map_general; + forward_map = skel->maps.forward_map_general; + tried = true; + goto restart; + } + goto end_destroy; } /* Add all the interfaces to forward group and attach - * egress devmap programe if exist + * egress devmap program if exist */ devmap_val.ifindex = ifindex; - devmap_val.bpf_prog.fd = egress_prog_fd; - ret = bpf_map_update_elem(forward_map_fd, &ifindex, &devmap_val, 0); - if (ret) { - perror("bpf_map_update_elem forward_map"); - goto err_out; + if (xdp_devmap_attached) + devmap_val.bpf_prog.fd = bpf_program__fd(skel->progs.xdp_devmap_prog); + ret = bpf_map_update_elem(bpf_map__fd(forward_map), &ifindex, &devmap_val, 0); + if (ret < 0) { + fprintf(stderr, "Failed to update devmap value: %s\n", + strerror(errno)); + ret = EXIT_FAIL_BPF; + goto end_destroy; } } - poll_stats(2); - - return 0; - -err_out: - return 1; + ret = sample_run(interval, NULL, NULL); + if (ret < 0) { + fprintf(stderr, "Failed during sample run: %s\n", strerror(-ret)); + ret = EXIT_FAIL; + goto end_destroy; + } + ret = EXIT_OK; +end_destroy: + xdp_redirect_map_multi__destroy(skel); +end: + sample_exit(ret); } diff --git a/samples/bpf/xdp_sample_user.c b/samples/bpf/xdp_sample_user.c index eb484c15492d..b32d82178199 100644 --- a/samples/bpf/xdp_sample_user.c +++ b/samples/bpf/xdp_sample_user.c @@ -1510,7 +1510,7 @@ static int sample_timer_cb(int timerfd, struct stats_record **rec, if (ret < 0) return ret; - if (sample_xdp_cnt == 2) { + if (sample_xdp_cnt == 2 && !(sample_mask & SAMPLE_SKIP_HEADING)) { char fi[IFNAMSIZ]; char to[IFNAMSIZ]; const char *f, *t; diff --git a/samples/bpf/xdp_sample_user.h b/samples/bpf/xdp_sample_user.h index 3a678986cce2..d97465ff8c62 100644 --- a/samples/bpf/xdp_sample_user.h +++ b/samples/bpf/xdp_sample_user.h @@ -8,17 +8,18 @@ #include "xdp_sample_shared.h" enum stats_mask { - _SAMPLE_REDIRECT_MAP = 1U << 0, - SAMPLE_RX_CNT = 1U << 1, - SAMPLE_REDIRECT_ERR_CNT = 1U << 2, - SAMPLE_CPUMAP_ENQUEUE_CNT = 1U << 3, - SAMPLE_CPUMAP_KTHREAD_CNT = 1U << 4, - SAMPLE_EXCEPTION_CNT = 1U << 5, - SAMPLE_DEVMAP_XMIT_CNT = 1U << 6, - SAMPLE_REDIRECT_CNT = 1U << 7, - SAMPLE_REDIRECT_MAP_CNT = SAMPLE_REDIRECT_CNT | _SAMPLE_REDIRECT_MAP, - SAMPLE_REDIRECT_ERR_MAP_CNT = SAMPLE_REDIRECT_ERR_CNT | _SAMPLE_REDIRECT_MAP, + _SAMPLE_REDIRECT_MAP = 1U << 0, + SAMPLE_RX_CNT = 1U << 1, + SAMPLE_REDIRECT_ERR_CNT = 1U << 2, + SAMPLE_CPUMAP_ENQUEUE_CNT = 1U << 3, + SAMPLE_CPUMAP_KTHREAD_CNT = 1U << 4, + SAMPLE_EXCEPTION_CNT = 1U << 5, + SAMPLE_DEVMAP_XMIT_CNT = 1U << 6, + SAMPLE_REDIRECT_CNT = 1U << 7, + SAMPLE_REDIRECT_MAP_CNT = SAMPLE_REDIRECT_CNT | _SAMPLE_REDIRECT_MAP, + SAMPLE_REDIRECT_ERR_MAP_CNT = SAMPLE_REDIRECT_ERR_CNT | _SAMPLE_REDIRECT_MAP, SAMPLE_DEVMAP_XMIT_CNT_MULTI = 1U << 8, + SAMPLE_SKIP_HEADING = 1U << 9, }; /* Exit return codes */ |