diff options
Diffstat (limited to '')
| -rw-r--r-- | samples/bpf/xdp_redirect_map_user.c | 112 |
1 files changed, 92 insertions, 20 deletions
diff --git a/samples/bpf/xdp_redirect_map_user.c b/samples/bpf/xdp_redirect_map_user.c index 31131b6e7782..0e8192688dfc 100644 --- a/samples/bpf/xdp_redirect_map_user.c +++ b/samples/bpf/xdp_redirect_map_user.c @@ -14,6 +14,10 @@ #include <unistd.h> #include <libgen.h> #include <sys/resource.h> +#include <sys/ioctl.h> +#include <sys/types.h> +#include <sys/socket.h> +#include <netinet/in.h> #include "bpf_util.h" #include <bpf/bpf.h> @@ -22,6 +26,7 @@ static int ifindex_in; static int ifindex_out; static bool ifindex_out_xdp_dummy_attached = true; +static bool xdp_devmap_attached; static __u32 prog_id; static __u32 dummy_prog_id; @@ -83,6 +88,32 @@ static void poll_stats(int interval, int ifindex) } } +static int get_mac_addr(unsigned int ifindex_out, 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_out, ifname)) + goto err_out; + + strcpy(ifr.ifr_name, ifname); + + if (ioctl(fd, SIOCGIFHWADDR, &ifr) != 0) + goto err_out; + + memcpy(mac_addr, ifr.ifr_hwaddr.sa_data, 6 * sizeof(char)); + ret = 0; + +err_out: + close(fd); + return ret; +} + static void usage(const char *prog) { fprintf(stderr, @@ -90,24 +121,26 @@ static void usage(const char *prog) "OPTS:\n" " -S use skb-mode\n" " -N enforce native mode\n" - " -F force loading prog\n", + " -F force loading prog\n" + " -X load xdp program on egress\n", prog); } int main(int argc, char **argv) { struct bpf_prog_load_attr prog_load_attr = { - .prog_type = BPF_PROG_TYPE_XDP, + .prog_type = BPF_PROG_TYPE_UNSPEC, }; - struct bpf_program *prog, *dummy_prog; + struct bpf_program *prog, *dummy_prog, *devmap_prog; + int prog_fd, dummy_prog_fd, devmap_prog_fd = 0; + int tx_port_map_fd, tx_mac_map_fd; + struct bpf_devmap_val devmap_val; struct bpf_prog_info info = {}; __u32 info_len = sizeof(info); - int prog_fd, dummy_prog_fd; - const char *optstr = "FSN"; + const char *optstr = "FSNX"; struct bpf_object *obj; int ret, opt, key = 0; char filename[256]; - int tx_port_map_fd; while ((opt = getopt(argc, argv, optstr)) != -1) { switch (opt) { @@ -120,14 +153,21 @@ int main(int argc, char **argv) case 'F': xdp_flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST; break; + case 'X': + xdp_devmap_attached = true; + break; default: usage(basename(argv[0])); return 1; } } - if (!(xdp_flags & XDP_FLAGS_SKB_MODE)) + if (!(xdp_flags & XDP_FLAGS_SKB_MODE)) { xdp_flags |= XDP_FLAGS_DRV_MODE; + } else if (xdp_devmap_attached) { + printf("Load xdp program on egress with SKB mode not supported yet\n"); + return 1; + } if (optind == argc) { printf("usage: %s <IFNAME|IFINDEX>_IN <IFNAME|IFINDEX>_OUT\n", argv[0]); @@ -150,24 +190,28 @@ int main(int argc, char **argv) if (bpf_prog_load_xattr(&prog_load_attr, &obj, &prog_fd)) return 1; - prog = bpf_program__next(NULL, obj); - dummy_prog = bpf_program__next(prog, obj); - if (!prog || !dummy_prog) { - printf("finding a prog in obj file failed\n"); - return 1; + if (xdp_flags & XDP_FLAGS_SKB_MODE) { + prog = bpf_object__find_program_by_name(obj, "xdp_redirect_map_general"); + tx_port_map_fd = bpf_object__find_map_fd_by_name(obj, "tx_port_general"); + } else { + prog = bpf_object__find_program_by_name(obj, "xdp_redirect_map_native"); + tx_port_map_fd = bpf_object__find_map_fd_by_name(obj, "tx_port_native"); + } + dummy_prog = bpf_object__find_program_by_name(obj, "xdp_redirect_dummy_prog"); + if (!prog || dummy_prog < 0 || tx_port_map_fd < 0) { + printf("finding prog/dummy_prog/tx_port_map in obj file failed\n"); + goto out; } - /* bpf_prog_load_xattr gives us the pointer to first prog's fd, - * so we're missing only the fd for dummy prog - */ + prog_fd = bpf_program__fd(prog); dummy_prog_fd = bpf_program__fd(dummy_prog); - if (prog_fd < 0 || dummy_prog_fd < 0) { + if (prog_fd < 0 || dummy_prog_fd < 0 || tx_port_map_fd < 0) { printf("bpf_prog_load_xattr: %s\n", strerror(errno)); return 1; } - tx_port_map_fd = bpf_object__find_map_fd_by_name(obj, "tx_port"); + tx_mac_map_fd = bpf_object__find_map_fd_by_name(obj, "tx_mac"); rxcnt_map_fd = bpf_object__find_map_fd_by_name(obj, "rxcnt"); - if (tx_port_map_fd < 0 || rxcnt_map_fd < 0) { + if (tx_mac_map_fd < 0 || rxcnt_map_fd < 0) { printf("bpf_object__find_map_fd_by_name failed\n"); return 1; } @@ -199,11 +243,39 @@ int main(int argc, char **argv) } dummy_prog_id = info.id; + /* Load 2nd xdp prog on egress. */ + if (xdp_devmap_attached) { + unsigned char mac_addr[6]; + + devmap_prog = bpf_object__find_program_by_name(obj, "xdp_redirect_map_egress"); + if (!devmap_prog) { + printf("finding devmap_prog in obj file failed\n"); + goto out; + } + devmap_prog_fd = bpf_program__fd(devmap_prog); + if (devmap_prog_fd < 0) { + printf("finding devmap_prog fd failed\n"); + goto out; + } + + if (get_mac_addr(ifindex_out, mac_addr) < 0) { + printf("get interface %d mac failed\n", ifindex_out); + goto out; + } + + ret = bpf_map_update_elem(tx_mac_map_fd, &key, mac_addr, 0); + if (ret) { + perror("bpf_update_elem tx_mac_map_fd"); + goto out; + } + } + signal(SIGINT, int_exit); signal(SIGTERM, int_exit); - /* populate virtual to physical port map */ - ret = bpf_map_update_elem(tx_port_map_fd, &key, &ifindex_out, 0); + devmap_val.ifindex = ifindex_out; + devmap_val.bpf_prog.fd = devmap_prog_fd; + ret = bpf_map_update_elem(tx_port_map_fd, &key, &devmap_val, 0); if (ret) { perror("bpf_update_elem"); goto out; |