diff options
Diffstat (limited to 'samples/bpf')
| -rw-r--r-- | samples/bpf/Makefile | 3 | ||||
| -rw-r--r-- | samples/bpf/xdp_sample_pkts_kern.c | 57 | ||||
| -rw-r--r-- | samples/bpf/xdp_sample_pkts_user.c | 196 |
3 files changed, 0 insertions, 256 deletions
diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile index decd31167ee4..4ccf4236031c 100644 --- a/samples/bpf/Makefile +++ b/samples/bpf/Makefile @@ -44,7 +44,6 @@ tprogs-y += cpustat tprogs-y += xdp_adjust_tail tprogs-y += xdp_fwd tprogs-y += task_fd_query -tprogs-y += xdp_sample_pkts tprogs-y += ibumad tprogs-y += hbm @@ -95,7 +94,6 @@ cpustat-objs := cpustat_user.o xdp_adjust_tail-objs := xdp_adjust_tail_user.o xdp_fwd-objs := xdp_fwd_user.o task_fd_query-objs := task_fd_query_user.o $(TRACE_HELPERS) -xdp_sample_pkts-objs := xdp_sample_pkts_user.o ibumad-objs := ibumad_user.o hbm-objs := hbm.o $(CGROUP_HELPERS) @@ -148,7 +146,6 @@ always-y += cpustat_kern.o always-y += xdp_adjust_tail_kern.o always-y += xdp_fwd_kern.o always-y += task_fd_query_kern.o -always-y += xdp_sample_pkts_kern.o always-y += ibumad_kern.o always-y += hbm_out_kern.o always-y += hbm_edt_kern.o diff --git a/samples/bpf/xdp_sample_pkts_kern.c b/samples/bpf/xdp_sample_pkts_kern.c deleted file mode 100644 index 9cf76b340dd7..000000000000 --- a/samples/bpf/xdp_sample_pkts_kern.c +++ /dev/null @@ -1,57 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -#include <linux/ptrace.h> -#include <linux/version.h> -#include <uapi/linux/bpf.h> -#include <bpf/bpf_helpers.h> - -#define SAMPLE_SIZE 64ul - -struct { - __uint(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY); - __uint(key_size, sizeof(int)); - __uint(value_size, sizeof(u32)); -} my_map SEC(".maps"); - -SEC("xdp_sample") -int xdp_sample_prog(struct xdp_md *ctx) -{ - void *data_end = (void *)(long)ctx->data_end; - void *data = (void *)(long)ctx->data; - - /* Metadata will be in the perf event before the packet data. */ - struct S { - u16 cookie; - u16 pkt_len; - } __packed metadata; - - if (data < data_end) { - /* The XDP perf_event_output handler will use the upper 32 bits - * of the flags argument as a number of bytes to include of the - * packet payload in the event data. If the size is too big, the - * call to bpf_perf_event_output will fail and return -EFAULT. - * - * See bpf_xdp_event_output in net/core/filter.c. - * - * The BPF_F_CURRENT_CPU flag means that the event output fd - * will be indexed by the CPU number in the event map. - */ - u64 flags = BPF_F_CURRENT_CPU; - u16 sample_size; - int ret; - - metadata.cookie = 0xdead; - metadata.pkt_len = (u16)(data_end - data); - sample_size = min(metadata.pkt_len, SAMPLE_SIZE); - flags |= (u64)sample_size << 32; - - ret = bpf_perf_event_output(ctx, &my_map, flags, - &metadata, sizeof(metadata)); - if (ret) - bpf_printk("perf_event_output failed: %d\n", ret); - } - - return XDP_PASS; -} - -char _license[] SEC("license") = "GPL"; -u32 _version SEC("version") = LINUX_VERSION_CODE; diff --git a/samples/bpf/xdp_sample_pkts_user.c b/samples/bpf/xdp_sample_pkts_user.c deleted file mode 100644 index e39d7f654f30..000000000000 --- a/samples/bpf/xdp_sample_pkts_user.c +++ /dev/null @@ -1,196 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <linux/perf_event.h> -#include <linux/bpf.h> -#include <net/if.h> -#include <errno.h> -#include <assert.h> -#include <sys/sysinfo.h> -#include <sys/ioctl.h> -#include <signal.h> -#include <bpf/libbpf.h> -#include <bpf/bpf.h> -#include <libgen.h> -#include <linux/if_link.h> - -#include "perf-sys.h" - -static int if_idx; -static char *if_name; -static __u32 xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST; -static __u32 prog_id; -static struct perf_buffer *pb = NULL; - -static int do_attach(int idx, int fd, const char *name) -{ - struct bpf_prog_info info = {}; - __u32 info_len = sizeof(info); - int err; - - err = bpf_xdp_attach(idx, fd, xdp_flags, NULL); - if (err < 0) { - printf("ERROR: failed to attach program to %s\n", name); - return err; - } - - err = bpf_prog_get_info_by_fd(fd, &info, &info_len); - if (err) { - printf("can't get prog info - %s\n", strerror(errno)); - return err; - } - prog_id = info.id; - - return err; -} - -static int do_detach(int idx, const char *name) -{ - __u32 curr_prog_id = 0; - int err = 0; - - err = bpf_xdp_query_id(idx, xdp_flags, &curr_prog_id); - if (err) { - printf("bpf_xdp_query_id failed\n"); - return err; - } - if (prog_id == curr_prog_id) { - err = bpf_xdp_detach(idx, xdp_flags, NULL); - if (err < 0) - printf("ERROR: failed to detach prog from %s\n", name); - } else if (!curr_prog_id) { - printf("couldn't find a prog id on a %s\n", name); - } else { - printf("program on interface changed, not removing\n"); - } - - return err; -} - -#define SAMPLE_SIZE 64 - -static void print_bpf_output(void *ctx, int cpu, void *data, __u32 size) -{ - struct { - __u16 cookie; - __u16 pkt_len; - __u8 pkt_data[SAMPLE_SIZE]; - } __packed *e = data; - int i; - - if (e->cookie != 0xdead) { - printf("BUG cookie %x sized %d\n", e->cookie, size); - return; - } - - printf("Pkt len: %-5d bytes. Ethernet hdr: ", e->pkt_len); - for (i = 0; i < 14 && i < e->pkt_len; i++) - printf("%02x ", e->pkt_data[i]); - printf("\n"); -} - -static void sig_handler(int signo) -{ - do_detach(if_idx, if_name); - perf_buffer__free(pb); - exit(0); -} - -static void usage(const char *prog) -{ - fprintf(stderr, - "%s: %s [OPTS] <ifname|ifindex>\n\n" - "OPTS:\n" - " -F force loading prog\n" - " -S use skb-mode\n", - __func__, prog); -} - -int main(int argc, char **argv) -{ - const char *optstr = "FS"; - int prog_fd, map_fd, opt; - struct bpf_program *prog; - struct bpf_object *obj; - struct bpf_map *map; - char filename[256]; - int ret, err; - - while ((opt = getopt(argc, argv, optstr)) != -1) { - switch (opt) { - case 'F': - xdp_flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST; - break; - case 'S': - xdp_flags |= XDP_FLAGS_SKB_MODE; - break; - default: - usage(basename(argv[0])); - return 1; - } - } - - if (!(xdp_flags & XDP_FLAGS_SKB_MODE)) - xdp_flags |= XDP_FLAGS_DRV_MODE; - - if (optind == argc) { - usage(basename(argv[0])); - return 1; - } - - snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); - - obj = bpf_object__open_file(filename, NULL); - if (libbpf_get_error(obj)) - return 1; - - prog = bpf_object__next_program(obj, NULL); - bpf_program__set_type(prog, BPF_PROG_TYPE_XDP); - - err = bpf_object__load(obj); - if (err) - return 1; - - prog_fd = bpf_program__fd(prog); - - map = bpf_object__next_map(obj, NULL); - if (!map) { - printf("finding a map in obj file failed\n"); - return 1; - } - map_fd = bpf_map__fd(map); - - if_idx = if_nametoindex(argv[optind]); - if (!if_idx) - if_idx = strtoul(argv[optind], NULL, 0); - - if (!if_idx) { - fprintf(stderr, "Invalid ifname\n"); - return 1; - } - if_name = argv[optind]; - err = do_attach(if_idx, prog_fd, if_name); - if (err) - return err; - - if (signal(SIGINT, sig_handler) || - signal(SIGHUP, sig_handler) || - signal(SIGTERM, sig_handler)) { - perror("signal"); - return 1; - } - - pb = perf_buffer__new(map_fd, 8, print_bpf_output, NULL, NULL, NULL); - err = libbpf_get_error(pb); - if (err) { - perror("perf_buffer setup failed"); - return 1; - } - - while ((ret = perf_buffer__poll(pb, 1000)) >= 0) { - } - - kill(0, SIGINT); - return ret; -} |