/* Copyright 2016 Netflix, Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 */
#include <linux/version.h>
#include <linux/ptrace.h>
#include <uapi/linux/bpf.h>
#include <uapi/linux/bpf_perf_event.h>
#include "bpf_helpers.h"

#define MAX_IPS		8192

struct bpf_map_def SEC("maps") ip_map = {
	.type = BPF_MAP_TYPE_HASH,
	.key_size = sizeof(u64),
	.value_size = sizeof(u32),
	.max_entries = MAX_IPS,
};

SEC("perf_event")
int do_sample(struct bpf_perf_event_data *ctx)
{
	u64 ip;
	u32 *value, init_val = 1;

	ip = PT_REGS_IP(&ctx->regs);
	value = bpf_map_lookup_elem(&ip_map, &ip);
	if (value)
		*value += 1;
	else
		/* E2BIG not tested for this example only */
		bpf_map_update_elem(&ip_map, &ip, &init_val, BPF_NOEXIST);

	return 0;
}
char _license[] SEC("license") = "GPL";
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?h=nds-private-remove&amp;id=3abbac0b5dd3e3b3dfb30a4885cdde5c20e1cb83'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/include?h=nds-private-remove&amp;id=3abbac0b5dd3e3b3dfb30a4885cdde5c20e1cb83'>include</a>/<a href='/cgit.cgi/linux/net-next.git/log/include/dt-bindings?h=nds-private-remove&amp;id=3abbac0b5dd3e3b3dfb30a4885cdde5c20e1cb83'>dt-bindings</a>/<a href='/cgit.cgi/linux/net-next.git/log/include/dt-bindings/spmi?h=nds-private-remove&amp;id=3abbac0b5dd3e3b3dfb30a4885cdde5c20e1cb83'>spmi</a>/<a href='/cgit.cgi/linux/net-next.git/log/include/dt-bindings/spmi/spmi.h?h=nds-private-remove&amp;id=3abbac0b5dd3e3b3dfb30a4885cdde5c20e1cb83'>spmi.h</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/include/dt-bindings/spmi/spmi.h?h=nds-private-remove&amp;id=3abbac0b5dd3e3b3dfb30a4885cdde5c20e1cb83&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>