/* Copyright (c) 2016 Sargun Dhillon <sargun@sargun.me>
 *
 * 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/skbuff.h>
#include <linux/netdevice.h>
#include <uapi/linux/bpf.h>
#include <linux/version.h>
#include "bpf_helpers.h"

struct bpf_map_def SEC("maps") dnat_map = {
	.type = BPF_MAP_TYPE_HASH,
	.key_size = sizeof(struct sockaddr_in),
	.value_size = sizeof(struct sockaddr_in),
	.max_entries = 256,
};

/* kprobe is NOT a stable ABI
 * kernel functions can be removed, renamed or completely change semantics.
 * Number of arguments and their positions can change, etc.
 * In such case this bpf+kprobe example will no longer be meaningful
 *
 * This example sits on a syscall, and the syscall ABI is relatively stable
 * of course, across platforms, and over time, the ABI may change.
 */
SEC("kprobe/sys_connect")
int bpf_prog1(struct pt_regs *ctx)
{
	struct sockaddr_in new_addr, orig_addr = {};
	struct sockaddr_in *mapped_addr;
	void *sockaddr_arg = (void *)PT_REGS_PARM2(ctx);
	int sockaddr_len = (int)PT_REGS_PARM3(ctx);

	if (sockaddr_len > sizeof(orig_addr))
		return 0;

	if (bpf_probe_read(&orig_addr, sizeof(orig_addr), sockaddr_arg) != 0)
		return 0;

	mapped_addr = bpf_map_lookup_elem(&dnat_map, &orig_addr);
	if (mapped_addr != NULL) {
		memcpy(&new_addr, mapped_addr, sizeof(new_addr));
		bpf_probe_write_user(sockaddr_arg, &new_addr,
				     sizeof(new_addr));
	}
	return 0;
}

char _license[] SEC("license") = "GPL";
u32 _version SEC("version") = LINUX_VERSION_CODE;
efs</a><a href='/cgit.cgi/linux/net-next.git/log/sound/soc/amd/include'>log</a><a href='/cgit.cgi/linux/net-next.git/tree/sound/soc/amd/include?id=dd86e373e09fb16b83e8adf5c48c421a4ca76468'>tree</a><a class='active' href='/cgit.cgi/linux/net-next.git/commit/sound/soc/amd/include?id=dd86e373e09fb16b83e8adf5c48c421a4ca76468'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/sound/soc/amd/include?id=dd86e373e09fb16b83e8adf5c48c421a4ca76468'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/sound/soc/amd/include'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=dd86e373e09fb16b83e8adf5c48c421a4ca76468'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound?id=dd86e373e09fb16b83e8adf5c48c421a4ca76468'>sound</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/soc?id=dd86e373e09fb16b83e8adf5c48c421a4ca76468'>soc</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/soc/amd?id=dd86e373e09fb16b83e8adf5c48c421a4ca76468'>amd</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/soc/amd/include?id=dd86e373e09fb16b83e8adf5c48c421a4ca76468'>include</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='dd86e373e09fb16b83e8adf5c48c421a4ca76468'/><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>Thomas Gleixner &lt;tglx@linutronix.de&gt;</td><td class='right'>2017-01-31 23:58:38 +0100</td></tr>
<tr><th>committer</th><td>Ingo Molnar &lt;mingo@kernel.org&gt;</td><td class='right'>2017-02-01 08:37:27 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/soc/amd/include?id=dd86e373e09fb16b83e8adf5c48c421a4ca76468'>dd86e373e09fb16b83e8adf5c48c421a4ca76468</a> (<a href='/cgit.cgi/linux/net-next.git/patch/sound/soc/amd/include?id=dd86e373e09fb16b83e8adf5c48c421a4ca76468'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=dd86e373e09fb16b83e8adf5c48c421a4ca76468'>55703c2ea8584e303e342090614e0aab3509ab21</a> /<a href='/cgit.cgi/linux/net-next.git/tree/sound/soc/amd/include?id=dd86e373e09fb16b83e8adf5c48c421a4ca76468'>sound/soc/amd/include</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/soc/amd/include?id=0b3589be9b98994ce3d5aeca52445d1f5627c4ba'>0b3589be9b98994ce3d5aeca52445d1f5627c4ba</a> (<a href='/cgit.cgi/linux/net-next.git/diff/sound/soc/amd/include?id=dd86e373e09fb16b83e8adf5c48c421a4ca76468&amp;id2=0b3589be9b98994ce3d5aeca52445d1f5627c4ba'>diff</a>)</td></tr></table>
<div class='commit-subject'>perf/x86/intel/rapl: Make package handling more robust</div><div class='commit-msg'>The package management code in RAPL relies on package mapping being
available before a CPU is started. This changed with:

  9d85eb9119f4 ("x86/smpboot: Make logical package management more robust")

because the ACPI/BIOS information turned out to be unreliable, but that
left RAPL in broken state. This was not noticed because on a regular boot
all CPUs are online before RAPL is initialized.

A possible fix would be to reintroduce the mess which allocates a package
data structure in CPU prepare and when it turns out to already exist in
starting throw it away later in the CPU online callback. But that's a
horrible hack and not required at all because RAPL becomes functional for
perf only in the CPU online callback. That's correct because user space is
not yet informed about the CPU being onlined, so nothing caan rely on RAPL
being available on that particular CPU.

Move the allocation to the CPU online callback and simplify the hotplug
handling. At this point the package mapping is established and correct.

This also adds a missing check for available package data in the
event_init() function.

Reported-by: Yasuaki Ishimatsu &lt;yasu.isimatu@gmail.com&gt;
Signed-off-by: Thomas Gleixner &lt;tglx@linutronix.de&gt;
Cc: Alexander Shishkin &lt;alexander.shishkin@linux.intel.com&gt;
Cc: Arnaldo Carvalho de Melo &lt;acme@redhat.com&gt;
Cc: Jiri Olsa &lt;jolsa@redhat.com&gt;
Cc: Linus Torvalds &lt;torvalds@linux-foundation.org&gt;
Cc: Peter Zijlstra &lt;peterz@infradead.org&gt;
Cc: Sebastian Siewior &lt;bigeasy@linutronix.de&gt;
Cc: Stephane Eranian &lt;eranian@google.com&gt;
Cc: Vince Weaver &lt;vincent.weaver@maine.edu&gt;
Fixes: 9d85eb9119f4 ("x86/smpboot: Make logical package management more robust")
Link: http://lkml.kernel.org/r/20170131230141.212593966@linutronix.de
Signed-off-by: Ingo Molnar &lt;mingo@kernel.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=dd86e373e09fb16b83e8adf5c48c421a4ca76468'>Diffstat</a> (limited to 'sound/soc/amd/include')</div><table summary='diffstat' class='diffstat'>