/* IP tables module for matching the value of the IPv4/IPv6 DSCP field
 *
 * (C) 2002 by Harald Welte <laforge@netfilter.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <net/dsfield.h>

#include <linux/netfilter/x_tables.h>
#include <linux/netfilter/xt_dscp.h>

MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
MODULE_DESCRIPTION("Xtables: DSCP/TOS field match");
MODULE_LICENSE("GPL");
MODULE_ALIAS("ipt_dscp");
MODULE_ALIAS("ip6t_dscp");
MODULE_ALIAS("ipt_tos");
MODULE_ALIAS("ip6t_tos");

static bool
dscp_mt(const struct sk_buff *skb, struct xt_action_param *par)
{
	const struct xt_dscp_info *info = par->matchinfo;
	u_int8_t dscp = ipv4_get_dsfield(ip_hdr(skb)) >> XT_DSCP_SHIFT;

	return (dscp == info->dscp) ^ !!info->invert;
}

static bool
dscp_mt6(const struct sk_buff *skb, struct xt_action_param *par)
{
	const struct xt_dscp_info *info = par->matchinfo;
	u_int8_t dscp = ipv6_get_dsfield(ipv6_hdr(skb)) >> XT_DSCP_SHIFT;

	return (dscp == info->dscp) ^ !!info->invert;
}

static int dscp_mt_check(const struct xt_mtchk_param *par)
{
	const struct xt_dscp_info *info = par->matchinfo;

	if (info->dscp > XT_DSCP_MAX) {
		pr_info("dscp %x out of range\n", info->dscp);
		return -EDOM;
	}

	return 0;
}

static bool tos_mt(const struct sk_buff *skb, struct xt_action_param *par)
{
	const struct xt_tos_match_info *info = par->matchinfo;

	if (xt_family(par) == NFPROTO_IPV4)
		return ((ip_hdr(skb)->tos & info->tos_mask) ==
		       info->tos_value) ^ !!info->invert;
	else
		return ((ipv6_get_dsfield(ipv6_hdr(skb)) & info->tos_mask) ==
		       info->tos_value) ^ !!info->invert;
}

static struct xt_match dscp_mt_reg[] __read_mostly = {
	{
		.name		= "dscp",
		.family		= NFPROTO_IPV4,
		.checkentry	= dscp_mt_check,
		.match		= dscp_mt,
		.matchsize	= sizeof(struct xt_dscp_info),
		.me		= THIS_MODULE,
	},
	{
		.name		= "dscp",
		.family		= NFPROTO_IPV6,
		.checkentry	= dscp_mt_check,
		.match		= dscp_mt6,
		.matchsize	= sizeof(struct xt_dscp_info),
		.me		= THIS_MODULE,
	},
	{
		.name		= "tos",
		.revision	= 1,
		.family		= NFPROTO_IPV4,
		.match		= tos_mt,
		.matchsize	= sizeof(struct xt_tos_match_info),
		.me		= THIS_MODULE,
	},
	{
		.name		= "tos",
		.revision	= 1,
		.family		= NFPROTO_IPV6,
		.match		= tos_mt,
		.matchsize	= sizeof(struct xt_tos_match_info),
		.me		= THIS_MODULE,
	},
};

static int __init dscp_mt_init(void)
{
	return xt_register_matches(dscp_mt_reg, ARRAY_SIZE(dscp_mt_reg));
}

static void __exit dscp_mt_exit(void)
{
	xt_unregister_matches(dscp_mt_reg, ARRAY_SIZE(dscp_mt_reg));
}

module_init(dscp_mt_init);
module_exit(dscp_mt_exit);
ed'>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>Jan Kara &lt;jack@suse.cz&gt;</td><td class='right'>2016-12-14 15:07:04 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-12-14 16:04:09 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?id=0721ec8bc156fafc9057ec1df95cdb3bbc3cbae8'>0721ec8bc156fafc9057ec1df95cdb3bbc3cbae8</a> (<a href='/cgit.cgi/linux/net-next.git/patch/?id=0721ec8bc156fafc9057ec1df95cdb3bbc3cbae8'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=0721ec8bc156fafc9057ec1df95cdb3bbc3cbae8'>f7bbba17d6cf8ae2d04fe549f55b79b374ec7e64</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?id=1a29d85eb0f19b7d8271923d8917d7b4f5540b3e'>1a29d85eb0f19b7d8271923d8917d7b4f5540b3e</a> (<a href='/cgit.cgi/linux/net-next.git/diff/?id=0721ec8bc156fafc9057ec1df95cdb3bbc3cbae8&amp;id2=1a29d85eb0f19b7d8271923d8917d7b4f5540b3e'>diff</a>)</td></tr></table>
<div class='commit-subject'>mm: use pgoff in struct vm_fault instead of passing it separately</div><div class='commit-msg'>struct vm_fault has already pgoff entry.  Use it instead of passing
pgoff as a separate argument and then assigning it later.

Link: http://lkml.kernel.org/r/1479460644-25076-4-git-send-email-jack@suse.cz
Signed-off-by: Jan Kara &lt;jack@suse.cz&gt;
Reviewed-by: Ross Zwisler &lt;ross.zwisler@linux.intel.com&gt;
Acked-by: Kirill A. Shutemov &lt;kirill.shutemov@linux.intel.com&gt;
Cc: Dan Williams &lt;dan.j.williams@intel.com&gt;
Signed-off-by: Andrew Morton &lt;akpm@linux-foundation.org&gt;
Signed-off-by: Linus Torvalds &lt;torvalds@linux-foundation.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=0721ec8bc156fafc9057ec1df95cdb3bbc3cbae8'>Diffstat</a></div><table summary='diffstat' class='diffstat'>