/* 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";
name='h' onchange='this.form.submit();'>
<option value='emaclite-cleanup'>emaclite-cleanup</option>
<option value='master'>master</option>
<option value='nds-private-remove' selected='selected'>nds-private-remove</option>
<option value='packet-loop-back'>packet-loop-back</option>
<option value='packet-rx-pump-back'>packet-rx-pump-back</option>
</select> <input type='submit' value='switch'/></form></td></tr>
<tr><td class='sub'>net-next plumbings</td><td class='sub right'>Tobias Klauser</td></tr></table>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?h=nds-private-remove&amp;id=9b37c937313bf6769d0b018ca35180b379d40862'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/net?h=nds-private-remove&amp;id=9b37c937313bf6769d0b018ca35180b379d40862'>net</a>/<a href='/cgit.cgi/linux/net-next.git/log/net/kcm?h=nds-private-remove&amp;id=9b37c937313bf6769d0b018ca35180b379d40862'>kcm</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/net/kcm?h=nds-private-remove&amp;id=9b37c937313bf6769d0b018ca35180b379d40862&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
<tr><td><span title='2017-02-09 16:38:48 -0500'>2017-02-09</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net/kcm?h=nds-private-remove&amp;id=98e3862ca2b1ae595a13805dcab4c3a6d7718f4d'>kcm: fix 0-length case for kcm_sendmsg()</a></td><td>WANG Cong</td><td>1</td><td><span class='deletions'>-18</span>/<span class='insertions'>+22</span></td></tr>