/* 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";
b6e718c5bdf35cbc1de4f781c71794d2a4'/><select 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>
<table class='tabs'><tr><td>
<a href='/cgit.cgi/linux/net-next.git/?h=nds-private-remove'>summary</a><a href='/cgit.cgi/linux/net-next.git/refs/?h=nds-private-remove&amp;id=fd263fb6e718c5bdf35cbc1de4f781c71794d2a4'>refs</a><a class='active' href='/cgit.cgi/linux/net-next.git/log/sound/isa/opl3sa2.c?h=nds-private-remove'>log</a><a href='/cgit.cgi/linux/net-next.git/tree/sound/isa/opl3sa2.c?h=nds-private-remove&amp;id=fd263fb6e718c5bdf35cbc1de4f781c71794d2a4'>tree</a><a href='/cgit.cgi/linux/net-next.git/commit/sound/isa/opl3sa2.c?h=nds-private-remove&amp;id=fd263fb6e718c5bdf35cbc1de4f781c71794d2a4'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/sound/isa/opl3sa2.c?h=nds-private-remove&amp;id=fd263fb6e718c5bdf35cbc1de4f781c71794d2a4'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/sound/isa/opl3sa2.c'>
<input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='fd263fb6e718c5bdf35cbc1de4f781c71794d2a4'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?h=nds-private-remove&amp;id=fd263fb6e718c5bdf35cbc1de4f781c71794d2a4'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound?h=nds-private-remove&amp;id=fd263fb6e718c5bdf35cbc1de4f781c71794d2a4'>sound</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/isa?h=nds-private-remove&amp;id=fd263fb6e718c5bdf35cbc1de4f781c71794d2a4'>isa</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/isa/opl3sa2.c?h=nds-private-remove&amp;id=fd263fb6e718c5bdf35cbc1de4f781c71794d2a4'>opl3sa2.c</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/sound/isa/opl3sa2.c?h=nds-private-remove&amp;id=fd263fb6e718c5bdf35cbc1de4f781c71794d2a4&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>