/* Copyright (c) 2016 Facebook
 *
 * 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/ptrace.h>
#include <linux/version.h>
#include <uapi/linux/bpf.h>
#include <uapi/linux/bpf_perf_event.h>
#include <uapi/linux/perf_event.h>
#include "bpf_helpers.h"

struct key_t {
	char comm[TASK_COMM_LEN];
	u32 kernstack;
	u32 userstack;
};

struct bpf_map_def SEC("maps") counts = {
	.type = BPF_MAP_TYPE_HASH,
	.key_size = sizeof(struct key_t),
	.value_size = sizeof(u64),
	.max_entries = 10000,
};

struct bpf_map_def SEC("maps") stackmap = {
	.type = BPF_MAP_TYPE_STACK_TRACE,
	.key_size = sizeof(u32),
	.value_size = PERF_MAX_STACK_DEPTH * sizeof(u64),
	.max_entries = 10000,
};

#define KERN_STACKID_FLAGS (0 | BPF_F_FAST_STACK_CMP)
#define USER_STACKID_FLAGS (0 | BPF_F_FAST_STACK_CMP | BPF_F_USER_STACK)

SEC("perf_event")
int bpf_prog1(struct bpf_perf_event_data *ctx)
{
	char fmt[] = "CPU-%d period %lld ip %llx";
	u32 cpu = bpf_get_smp_processor_id();
	struct key_t key;
	u64 *val, one = 1;

	if (ctx->sample_period < 10000)
		/* ignore warmup */
		return 0;
	bpf_get_current_comm(&key.comm, sizeof(key.comm));
	key.kernstack = bpf_get_stackid(ctx, &stackmap, KERN_STACKID_FLAGS);
	key.userstack = bpf_get_stackid(ctx, &stackmap, USER_STACKID_FLAGS);
	if ((int)key.kernstack < 0 && (int)key.userstack < 0) {
		bpf_trace_printk(fmt, sizeof(fmt), cpu, ctx->sample_period,
				 PT_REGS_IP(&ctx->regs));
		return 0;
	}

	val = bpf_map_lookup_elem(&counts, &key);
	if (val)
		(*val)++;
	else
		bpf_map_update_elem(&counts, &key, &one, 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/commit/?id=72d19459d7919f966594576bb042d15a451f27ea'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include?id=72d19459d7919f966594576bb042d15a451f27ea'>include</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/net?id=72d19459d7919f966594576bb042d15a451f27ea'>net</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/net/dst_cache.h?id=72d19459d7919f966594576bb042d15a451f27ea'>dst_cache.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='72d19459d7919f966594576bb042d15a451f27ea'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Benjamin Tissoires &lt;benjamin.tissoires@redhat.com&gt;</td><td class='right'>2016-11-25 14:27:21 +0100</td></tr>
<tr><th>committer</th><td>Jiri Kosina &lt;jkosina@suse.cz&gt;</td><td class='right'>2016-11-28 14:39:47 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/net/dst_cache.h?id=72d19459d7919f966594576bb042d15a451f27ea'>72d19459d7919f966594576bb042d15a451f27ea</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/net/dst_cache.h?id=72d19459d7919f966594576bb042d15a451f27ea'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=72d19459d7919f966594576bb042d15a451f27ea'>57f4aacfa8709eb1f37dff82d51f49d82aae3363</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/net/dst_cache.h?id=72d19459d7919f966594576bb042d15a451f27ea'>include/net/dst_cache.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/net/dst_cache.h?id=5cc5084dd9afa2f9bf953b0217bdb1b7c2158be1'>5cc5084dd9afa2f9bf953b0217bdb1b7c2158be1</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/net/dst_cache.h?id=72d19459d7919f966594576bb042d15a451f27ea&amp;id2=5cc5084dd9afa2f9bf953b0217bdb1b7c2158be1'>diff</a>)</td></tr></table>
<div class='commit-subject'>HID: input: rework HID_QUIRK_MULTI_INPUT</div><div class='commit-msg'>The purpose of HID_QUIRK_MULTI_INPUT is to have an input device per
report id. This is useful when the HID device presents several HID
collections of different device types.

The current implementation of hid-input creates one input node per id per
type (input or output). This is problematic for the LEDs of a keyboard as
they are often set through an output report. The current code creates
one input node with all the keyboard keys, and one other with only the
LEDs.

To solve this, we use a two-passes way:
- first, we initialize all input nodes and associate one per report id
- then, we register all the input nodes

Signed-off-by: Benjamin Tissoires &lt;benjamin.tissoires@redhat.com&gt;
Signed-off-by: Jiri Kosina &lt;jkosina@suse.cz&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=72d19459d7919f966594576bb042d15a451f27ea'>Diffstat</a> (limited to 'include/net/dst_cache.h')</div><table summary='diffstat' class='diffstat'>