| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Martin KaFai Lau | 1158 | 78.40% | 1 | 5.88% |
| Maciej Fijalkowski | 220 | 14.90% | 3 | 17.65% |
| Daniel T. Lee | 32 | 2.17% | 2 | 11.76% |
| Toke Höiland-Jörgensen | 15 | 1.02% | 2 | 11.76% |
| Daniel Borkmann | 14 | 0.95% | 1 | 5.88% |
| David Ahern | 13 | 0.88% | 1 | 5.88% |
| Jesper Dangaard Brouer | 9 | 0.61% | 2 | 11.76% |
| Andy Gospodarek | 7 | 0.47% | 1 | 5.88% |
| Eric Leblond | 3 | 0.20% | 1 | 5.88% |
| Joe Stringer | 3 | 0.20% | 1 | 5.88% |
| Thomas Gleixner | 2 | 0.14% | 1 | 5.88% |
| Jakub Kiciński | 1 | 0.07% | 1 | 5.88% |
| Total | 1477 | 17 |
// SPDX-License-Identifier: GPL-2.0-only /* Copyright (c) 2016 Facebook */ #include <linux/bpf.h> #include <linux/if_link.h> #include <assert.h> #include <errno.h> #include <signal.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <net/if.h> #include <sys/resource.h> #include <arpa/inet.h> #include <netinet/ether.h> #include <unistd.h> #include <time.h> #include <bpf/libbpf.h> #include <bpf/bpf.h> #include "bpf_util.h" #include "xdp_tx_iptunnel_common.h" #define STATS_INTERVAL_S 2U static int ifindex = -1; static __u32 xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST; static int rxcnt_map_fd; static __u32 prog_id; static void int_exit(int sig) { __u32 curr_prog_id = 0; if (ifindex > -1) { if (bpf_get_link_xdp_id(ifindex, &curr_prog_id, xdp_flags)) { printf("bpf_get_link_xdp_id failed\n"); exit(1); } if (prog_id == curr_prog_id) bpf_set_link_xdp_fd(ifindex, -1, xdp_flags); else if (!curr_prog_id) printf("couldn't find a prog id on a given iface\n"); else printf("program on interface changed, not removing\n"); } exit(0); } /* simple per-protocol drop counter */ static void poll_stats(unsigned int kill_after_s) { const unsigned int nr_protos = 256; unsigned int nr_cpus = bpf_num_possible_cpus(); time_t started_at = time(NULL); __u64 values[nr_cpus], prev[nr_protos][nr_cpus]; __u32 proto; int i; memset(prev, 0, sizeof(prev)); while (!kill_after_s || time(NULL) - started_at <= kill_after_s) { sleep(STATS_INTERVAL_S); for (proto = 0; proto < nr_protos; proto++) { __u64 sum = 0; assert(bpf_map_lookup_elem(rxcnt_map_fd, &proto, values) == 0); for (i = 0; i < nr_cpus; i++) sum += (values[i] - prev[proto][i]); if (sum) printf("proto %u: sum:%10llu pkts, rate:%10llu pkts/s\n", proto, sum, sum / STATS_INTERVAL_S); memcpy(prev[proto], values, sizeof(values)); } } } static void usage(const char *cmd) { printf("Start a XDP prog which encapsulates incoming packets\n" "in an IPv4/v6 header and XDP_TX it out. The dst <VIP:PORT>\n" "is used to select packets to encapsulate\n\n"); printf("Usage: %s [...]\n", cmd); printf(" -i <ifname|ifindex> Interface\n"); printf(" -a <vip-service-address> IPv4 or IPv6\n"); printf(" -p <vip-service-port> A port range (e.g. 433-444) is also allowed\n"); printf(" -s <source-ip> Used in the IPTunnel header\n"); printf(" -d <dest-ip> Used in the IPTunnel header\n"); printf(" -m <dest-MAC> Used in sending the IP Tunneled pkt\n"); printf(" -T <stop-after-X-seconds> Default: 0 (forever)\n"); 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"); } static int parse_ipstr(const char *ipstr, unsigned int *addr) { if (inet_pton(AF_INET6, ipstr, addr) == 1) { return AF_INET6; } else if (inet_pton(AF_INET, ipstr, addr) == 1) { addr[1] = addr[2] = addr[3] = 0; return AF_INET; } fprintf(stderr, "%s is an invalid IP\n", ipstr); return AF_UNSPEC; } static int parse_ports(const char *port_str, int *min_port, int *max_port) { char *end; long tmp_min_port; long tmp_max_port; tmp_min_port = strtol(optarg, &end, 10); if (tmp_min_port < 1 || tmp_min_port > 65535) { fprintf(stderr, "Invalid port(s):%s\n", optarg); return 1; } if (*end == '-') { end++; tmp_max_port = strtol(end, NULL, 10); if (tmp_max_port < 1 || tmp_max_port > 65535) { fprintf(stderr, "Invalid port(s):%s\n", optarg); return 1; } } else { tmp_max_port = tmp_min_port; } if (tmp_min_port > tmp_max_port) { fprintf(stderr, "Invalid port(s):%s\n", optarg); return 1; } if (tmp_max_port - tmp_min_port + 1 > MAX_IPTNL_ENTRIES) { fprintf(stderr, "Port range (%s) is larger than %u\n", port_str, MAX_IPTNL_ENTRIES); return 1; } *min_port = tmp_min_port; *max_port = tmp_max_port; return 0; } int main(int argc, char **argv) { struct bpf_prog_load_attr prog_load_attr = { .prog_type = BPF_PROG_TYPE_XDP, }; int min_port = 0, max_port = 0, vip2tnl_map_fd; const char *optstr = "i:a:p:s:d:m:T:P:FSNh"; unsigned char opt_flags[256] = {}; struct bpf_prog_info info = {}; __u32 info_len = sizeof(info); unsigned int kill_after_s = 0; struct iptnl_info tnl = {}; struct bpf_object *obj; struct vip vip = {}; char filename[256]; int opt, prog_fd; int i, err; tnl.family = AF_UNSPEC; vip.protocol = IPPROTO_TCP; for (i = 0; i < strlen(optstr); i++) if (optstr[i] != 'h' && 'a' <= optstr[i] && optstr[i] <= 'z') opt_flags[(unsigned char)optstr[i]] = 1; while ((opt = getopt(argc, argv, optstr)) != -1) { unsigned short family; unsigned int *v6; switch (opt) { case 'i': ifindex = if_nametoindex(optarg); if (!ifindex) ifindex = atoi(optarg); break; case 'a': vip.family = parse_ipstr(optarg, vip.daddr.v6); if (vip.family == AF_UNSPEC) return 1; break; case 'p': if (parse_ports(optarg, &min_port, &max_port)) return 1; break; case 'P': vip.protocol = atoi(optarg); break; case 's': case 'd': if (opt == 's') v6 = tnl.saddr.v6; else v6 = tnl.daddr.v6; family = parse_ipstr(optarg, v6); if (family == AF_UNSPEC) return 1; if (tnl.family == AF_UNSPEC) { tnl.family = family; } else if (tnl.family != family) { fprintf(stderr, "The IP version of the src and dst addresses used in the IP encapsulation does not match\n"); return 1; } break; case 'm': if (!ether_aton_r(optarg, (struct ether_addr *)tnl.dmac)) { fprintf(stderr, "Invalid mac address:%s\n", optarg); return 1; } break; case 'T': kill_after_s = atoi(optarg); break; case 'S': xdp_flags |= XDP_FLAGS_SKB_MODE; break; case 'N': /* default, set below */ break; case 'F': xdp_flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST; break; default: usage(argv[0]); return 1; } opt_flags[opt] = 0; } if (!(xdp_flags & XDP_FLAGS_SKB_MODE)) xdp_flags |= XDP_FLAGS_DRV_MODE; for (i = 0; i < strlen(optstr); i++) { if (opt_flags[(unsigned int)optstr[i]]) { fprintf(stderr, "Missing argument -%c\n", optstr[i]); usage(argv[0]); return 1; } } if (!ifindex) { fprintf(stderr, "Invalid ifname\n"); return 1; } snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); prog_load_attr.file = filename; if (bpf_prog_load_xattr(&prog_load_attr, &obj, &prog_fd)) return 1; if (!prog_fd) { printf("bpf_prog_load_xattr: %s\n", strerror(errno)); return 1; } rxcnt_map_fd = bpf_object__find_map_fd_by_name(obj, "rxcnt"); vip2tnl_map_fd = bpf_object__find_map_fd_by_name(obj, "vip2tnl"); if (vip2tnl_map_fd < 0 || rxcnt_map_fd < 0) { printf("bpf_object__find_map_fd_by_name failed\n"); return 1; } signal(SIGINT, int_exit); signal(SIGTERM, int_exit); while (min_port <= max_port) { vip.dport = htons(min_port++); if (bpf_map_update_elem(vip2tnl_map_fd, &vip, &tnl, BPF_NOEXIST)) { perror("bpf_map_update_elem(&vip2tnl)"); return 1; } } if (bpf_set_link_xdp_fd(ifindex, prog_fd, xdp_flags) < 0) { printf("link set xdp fd failed\n"); return 1; } err = bpf_obj_get_info_by_fd(prog_fd, &info, &info_len); if (err) { printf("can't get prog info - %s\n", strerror(errno)); return err; } prog_id = info.id; poll_stats(kill_after_s); bpf_set_link_xdp_fd(ifindex, -1, xdp_flags); return 0; }