/*
 * netsniff-ng - the packet sniffing beast
 * Copyright 2009, 2010, 2011, 2012 Daniel Borkmann.
 * Subject to the GPL, version 2.
 */

#include <stdint.h>
#include <stdlib.h>
#include <unistd.h>

#include "built_in.h"
#include "tprintf.h"
#include "pkt_buff.h"
#include "proto.h"
#include "dissector.h"
#include "dissector_eth.h"
#include "dissector_sll.h"
#include "dissector_80211.h"
#include "dissector_netlink.h"
#include "linktype.h"

int dissector_set_print_type(void *ptr, int type)
{
	struct protocol *proto;

	for (proto = ptr; proto; proto = proto->next) {
		switch (type) {
		case PRINT_NORM:
			proto->process = proto->print_full;
			break;
		case PRINT_LESS:
			proto->process = proto->print_less;
			break;
		default:
			proto->process = NULL;
			break;
		}
	}

	return 0;
}

static void dissector_main(struct pkt_buff *pkt, struct protocol *start,
			   struct protocol *end)
{
	struct protocol *dissector;

	if (!start)
		return;

	for (pkt->dissector = start; pkt->dissector; ) {
		if (unlikely(!pkt->dissector->process))
			break;

		dissector = pkt->dissector;
		pkt->dissector = NULL;
		dissector->process(pkt);
	}

	if (end && likely(end->process))
		end->process(pkt);
}

void dissector_entry_point(uint8_t *packet, size_t len, int linktype, int mode,
			   struct sockaddr_ll *sll)
{
	struct protocol *proto_start, *proto_end;
	struct pkt_buff *pkt;

	if (mode == PRINT_NONE)
		return;

	pkt = pkt_alloc(packet, len);
	pkt->link_type = linktype;
	pkt->sll = sll;

	switch (linktype) {
	case LINKTYPE_EN10MB:
	case ___constant_swab32(LINKTYPE_EN10MB):
		proto_start = dissector_get_ethernet_entry_point();
		proto_end = dissector_get_ethernet_exit_point();
		break;
	case LINKTYPE_IEEE802_11_RADIOTAP:
	case ___constant_swab32(LINKTYPE_IEEE802_11_RADIOTAP):
	case LINKTYPE_IEEE802_11:
	case ___constant_swab32(LINKTYPE_IEEE802_11):
		proto_start = dissector_get_ieee80211_entry_point();
		proto_end = dissector_get_ieee80211_exit_point();
		break;
	case LINKTYPE_NETLINK:
	case ___constant_swab32(LINKTYPE_NETLINK):
		proto_start = dissector_get_netlink_entry_point();
		proto_end = dissector_get_netlink_exit_point();
		break;
	case LINKTYPE_LINUX_SLL:
	case ___constant_swab32(LINKTYPE_LINUX_SLL):
		proto_start = dissector_get_sll_entry_point();
		proto_end = dissector_get_sll_exit_point();
		break;
	default:
		proto_start = &none_ops;
		proto_end = NULL;
		break;
	};

	dissector_main(pkt, proto_start, proto_end);

	switch (mode) {
	case PRINT_HEX:
		hex(pkt);
		break;
	case PRINT_ASCII:
		ascii(pkt);
		break;
	case PRINT_HEX_ASCII:
		hex_ascii(pkt);
		break;
	}

	tprintf_flush();
	pkt_free(pkt);
}

void dissector_init_all(int fnttype)
{
	dissector_init_ethernet(fnttype);
	dissector_init_ieee80211(fnttype);
	dissector_init_netlink(fnttype);
	dissector_init_sll(fnttype);
}

void dissector_cleanup_all(void)
{
	dissector_cleanup_ethernet();
	dissector_cleanup_ieee80211();
	dissector_cleanup_netlink();
	dissector_cleanup_sll();
}
next.git/commit/Documentation/devicetree?id=5ab666e09541e64ce2fd73411c3b5b9e4ad334b1'>devicetree</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='5ab666e09541e64ce2fd73411c3b5b9e4ad334b1'/><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>Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;</td><td class='right'>2016-06-27 23:47:15 +0200</td></tr>
<tr><th>committer</th><td>Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;</td><td class='right'>2016-06-27 23:47:15 +0200</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation/devicetree?id=5ab666e09541e64ce2fd73411c3b5b9e4ad334b1'>5ab666e09541e64ce2fd73411c3b5b9e4ad334b1</a> (<a href='/cgit.cgi/linux/net-next.git/patch/Documentation/devicetree?id=5ab666e09541e64ce2fd73411c3b5b9e4ad334b1'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=5ab666e09541e64ce2fd73411c3b5b9e4ad334b1'>a27fca471605ace51d24ee8a50619c9523e37250</a> /<a href='/cgit.cgi/linux/net-next.git/tree/Documentation/devicetree?id=5ab666e09541e64ce2fd73411c3b5b9e4ad334b1'>Documentation/devicetree</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation/devicetree?id=4c2e07c6a29e0129e975727b9f57eede813eea85'>4c2e07c6a29e0129e975727b9f57eede813eea85</a> (<a href='/cgit.cgi/linux/net-next.git/diff/Documentation/devicetree?id=5ab666e09541e64ce2fd73411c3b5b9e4ad334b1&amp;id2=4c2e07c6a29e0129e975727b9f57eede813eea85'>diff</a>)</td></tr></table>
<div class='commit-subject'>intel_pstate: Do not clear utilization update hooks on policy changes</div><div class='commit-msg'>intel_pstate_set_policy() is invoked by the cpufreq core during
driver initialization, on changes of policy attributes (minimim and
maximum frequency, for example) via sysfs and via CPU notifications
from the platform firmware.  On some platforms the latter may occur
relatively often.

Commit bb6ab52f2bef (intel_pstate: Do not set utilization update hook
too early) made intel_pstate_set_policy() clear the CPU's utilization
update hook before updating the policy attributes for it (and set the
hook again after doind that), but that involves invoking
synchronize_sched() and adds overhead to the CPU notifications
mentioned above and to the sched-RCU handling in general.

That extra overhead is arguably not necessary, because updating
policy attributes when the CPU's utilization update hook is active
should not lead to any adverse effects, so drop the clearing of
the hook from intel_pstate_set_policy() and make it check if
the hook has been set already when attempting to set it.

Fixes: bb6ab52f2bef (intel_pstate: Do not set utilization update hook too early)
Reported-by: Jisheng Zhang &lt;jszhang@marvell.com&gt;
Tested-by: Jisheng Zhang &lt;jszhang@marvell.com&gt;
Tested-by: Doug Smythies &lt;dsmythies@telus.net&gt;
Signed-off-by: Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=5ab666e09541e64ce2fd73411c3b5b9e4ad334b1'>Diffstat</a> (limited to 'Documentation/devicetree')</div><table summary='diffstat' class='diffstat'>