diff options
Diffstat (limited to 'samples/bpf/xdp_redirect_user.c')
| -rw-r--r-- | samples/bpf/xdp_redirect_user.c | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/samples/bpf/xdp_redirect_user.c b/samples/bpf/xdp_redirect_user.c new file mode 100644 index 000000000..8663dd631 --- /dev/null +++ b/samples/bpf/xdp_redirect_user.c @@ -0,0 +1,172 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* Copyright (c) 2016 John Fastabend <john.r.fastabend@intel.com> + */ +static const char *__doc__ = +"XDP redirect tool, using bpf_redirect helper\n" +"Usage: xdp_redirect <IFINDEX|IFNAME>_IN <IFINDEX|IFNAME>_OUT\n"; + +#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 <stdbool.h> +#include <string.h> +#include <net/if.h> +#include <unistd.h> +#include <libgen.h> +#include <getopt.h> +#include <bpf/bpf.h> +#include <bpf/libbpf.h> +#include "bpf_util.h" +#include "xdp_sample_user.h" +#include "xdp_redirect.skel.h" + +static int mask = SAMPLE_RX_CNT | SAMPLE_REDIRECT_ERR_CNT | + SAMPLE_EXCEPTION_CNT | SAMPLE_DEVMAP_XMIT_CNT_MULTI; + +DEFINE_SAMPLE_INIT(xdp_redirect); + +static const struct option long_options[] = { + {"help", no_argument, NULL, 'h' }, + {"skb-mode", no_argument, NULL, 'S' }, + {"force", no_argument, NULL, 'F' }, + {"stats", no_argument, NULL, 's' }, + {"interval", required_argument, NULL, 'i' }, + {"verbose", no_argument, NULL, 'v' }, + {} +}; + +int main(int argc, char **argv) +{ + int ifindex_in, ifindex_out, opt; + char str[2 * IF_NAMESIZE + 1]; + char ifname_out[IF_NAMESIZE]; + char ifname_in[IF_NAMESIZE]; + int ret = EXIT_FAIL_OPTION; + unsigned long interval = 2; + struct xdp_redirect *skel; + bool generic = false; + bool force = false; + bool error = true; + + while ((opt = getopt_long(argc, argv, "hSFi:vs", + long_options, NULL)) != -1) { + switch (opt) { + case 'S': + generic = true; + mask &= ~(SAMPLE_DEVMAP_XMIT_CNT | + SAMPLE_DEVMAP_XMIT_CNT_MULTI); + break; + case 'F': + force = true; + break; + case 'i': + interval = strtoul(optarg, NULL, 0); + break; + case 'v': + sample_switch_mode(); + break; + case 's': + mask |= SAMPLE_REDIRECT_CNT; + break; + case 'h': + error = false; + default: + sample_usage(argv, long_options, __doc__, mask, error); + return ret; + } + } + + if (argc <= optind + 1) { + sample_usage(argv, long_options, __doc__, mask, true); + return ret; + } + + ifindex_in = if_nametoindex(argv[optind]); + if (!ifindex_in) + ifindex_in = strtoul(argv[optind], NULL, 0); + + ifindex_out = if_nametoindex(argv[optind + 1]); + if (!ifindex_out) + ifindex_out = strtoul(argv[optind + 1], NULL, 0); + + if (!ifindex_in || !ifindex_out) { + fprintf(stderr, "Bad interface index or name\n"); + sample_usage(argv, long_options, __doc__, mask, true); + goto end; + } + + skel = xdp_redirect__open(); + if (!skel) { + fprintf(stderr, "Failed to xdp_redirect__open: %s\n", strerror(errno)); + ret = EXIT_FAIL_BPF; + goto end; + } + + 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; + } + + skel->rodata->from_match[0] = ifindex_in; + skel->rodata->to_match[0] = ifindex_out; + skel->rodata->ifindex_out = ifindex_out; + + ret = xdp_redirect__load(skel); + if (ret < 0) { + fprintf(stderr, "Failed to xdp_redirect__load: %s\n", strerror(errno)); + ret = EXIT_FAIL_BPF; + goto end_destroy; + } + + ret = sample_init(skel, mask); + if (ret < 0) { + fprintf(stderr, "Failed to initialize sample: %s\n", strerror(-ret)); + ret = EXIT_FAIL; + goto end_destroy; + } + + ret = EXIT_FAIL_XDP; + if (sample_install_xdp(skel->progs.xdp_redirect_prog, ifindex_in, + generic, force) < 0) + goto end_destroy; + + /* Loading dummy XDP prog on out-device */ + sample_install_xdp(skel->progs.xdp_redirect_dummy_prog, ifindex_out, + generic, force); + + ret = EXIT_FAIL; + if (!if_indextoname(ifindex_in, ifname_in)) { + fprintf(stderr, "Failed to if_indextoname for %d: %s\n", ifindex_in, + strerror(errno)); + goto end_destroy; + } + + if (!if_indextoname(ifindex_out, ifname_out)) { + fprintf(stderr, "Failed to if_indextoname for %d: %s\n", ifindex_out, + strerror(errno)); + goto end_destroy; + } + + safe_strncpy(str, get_driver_name(ifindex_in), sizeof(str)); + printf("Redirecting from %s (ifindex %d; driver %s) to %s (ifindex %d; driver %s)\n", + ifname_in, ifindex_in, str, ifname_out, ifindex_out, get_driver_name(ifindex_out)); + snprintf(str, sizeof(str), "%s->%s", ifname_in, ifname_out); + + 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__destroy(skel); +end: + sample_exit(ret); +} |