aboutsummaryrefslogtreecommitdiffstatshomepage
path: root/samples/bpf/xdp_sample_pkts_kern.c
diff options
context:
space:
mode:
Diffstat (limited to 'samples/bpf/xdp_sample_pkts_kern.c')
-rw-r--r--samples/bpf/xdp_sample_pkts_kern.c59
1 files changed, 0 insertions, 59 deletions
diff --git a/samples/bpf/xdp_sample_pkts_kern.c b/samples/bpf/xdp_sample_pkts_kern.c
deleted file mode 100644
index 33377289e2a8..000000000000
--- a/samples/bpf/xdp_sample_pkts_kern.c
+++ /dev/null
@@ -1,59 +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
-#define MAX_CPUS 128
-
-struct bpf_map_def SEC("maps") my_map = {
- .type = BPF_MAP_TYPE_PERF_EVENT_ARRAY,
- .key_size = sizeof(int),
- .value_size = sizeof(u32),
- .max_entries = MAX_CPUS,
-};
-
-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;