/*
 * net/sched/em_nbyte.c	N-Byte ematch
 *
 *		This program is free software; you can redistribute it and/or
 *		modify it under the terms of the GNU General Public License
 *		as published by the Free Software Foundation; either version
 *		2 of the License, or (at your option) any later version.
 *
 * Authors:	Thomas Graf <tgraf@suug.ch>
 */

#include <linux/gfp.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/skbuff.h>
#include <linux/tc_ematch/tc_em_nbyte.h>
#include <net/pkt_cls.h>

struct nbyte_data {
	struct tcf_em_nbyte	hdr;
	char			pattern[0];
};

static int em_nbyte_change(struct net *net, void *data, int data_len,
			   struct tcf_ematch *em)
{
	struct tcf_em_nbyte *nbyte = data;

	if (data_len < sizeof(*nbyte) ||
	    data_len < (sizeof(*nbyte) + nbyte->len))
		return -EINVAL;

	em->datalen = sizeof(*nbyte) + nbyte->len;
	em->data = (unsigned long)kmemdup(data, em->datalen, GFP_KERNEL);
	if (em->data == 0UL)
		return -ENOBUFS;

	return 0;
}

static int em_nbyte_match(struct sk_buff *skb, struct tcf_ematch *em,
			  struct tcf_pkt_info *info)
{
	struct nbyte_data *nbyte = (struct nbyte_data *) em->data;
	unsigned char *ptr = tcf_get_base_ptr(skb, nbyte->hdr.layer);

	ptr += nbyte->hdr.off;

	if (!tcf_valid_offset(skb, ptr, nbyte->hdr.len))
		return 0;

	return !memcmp(ptr + nbyte->hdr.off, nbyte->pattern, nbyte->hdr.len);
}

static struct tcf_ematch_ops em_nbyte_ops = {
	.kind	  = TCF_EM_NBYTE,
	.change	  = em_nbyte_change,
	.match	  = em_nbyte_match,
	.owner	  = THIS_MODULE,
	.link	  = LIST_HEAD_INIT(em_nbyte_ops.link)
};

static int __init init_em_nbyte(void)
{
	return tcf_em_register(&em_nbyte_ops);
}

static void __exit exit_em_nbyte(void)
{
	tcf_em_unregister(&em_nbyte_ops);
}

MODULE_LICENSE("GPL");

module_init(init_em_nbyte);
module_exit(exit_em_nbyte);

MODULE_ALIAS_TCF_EMATCH(TCF_EM_NBYTE);
linux/net-next.git/diff/net?id=fba143c66abb81307a450679f38ab953fe96a413'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/net'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=fba143c66abb81307a450679f38ab953fe96a413'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net?id=fba143c66abb81307a450679f38ab953fe96a413'>net</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='fba143c66abb81307a450679f38ab953fe96a413'/><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>Paul Moore &lt;paul@paul-moore.com&gt;</td><td class='right'>2016-11-29 16:57:48 -0500</td></tr>
<tr><th>committer</th><td>Paul Moore &lt;paul@paul-moore.com&gt;</td><td class='right'>2016-12-14 13:06:04 -0500</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net?id=fba143c66abb81307a450679f38ab953fe96a413'>fba143c66abb81307a450679f38ab953fe96a413</a> (<a href='/cgit.cgi/linux/net-next.git/patch/net?id=fba143c66abb81307a450679f38ab953fe96a413'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=fba143c66abb81307a450679f38ab953fe96a413'>c9933c76c704f6751b10b662fc9c8ec4a1682529</a> /<a href='/cgit.cgi/linux/net-next.git/tree/net?id=fba143c66abb81307a450679f38ab953fe96a413'>net</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net?id=a09cfa470817ac086cf68418da13a2b91c2744ef'>a09cfa470817ac086cf68418da13a2b91c2744ef</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net?id=fba143c66abb81307a450679f38ab953fe96a413&amp;id2=a09cfa470817ac086cf68418da13a2b91c2744ef'>diff</a>)</td></tr></table>
<div class='commit-subject'>netns: avoid disabling irq for netns id</div><div class='commit-msg'>Bring back commit bc51dddf98c9 ("netns: avoid disabling irq for netns
id") now that we've fixed some audit multicast issues that caused
problems with original attempt.  Additional information, and history,
can be found in the links below:

 * https://github.com/linux-audit/audit-kernel/issues/22
 * https://github.com/linux-audit/audit-kernel/issues/23

Signed-off-by: Cong Wang &lt;xiyou.wangcong@gmail.com&gt;
Signed-off-by: Paul Moore &lt;paul@paul-moore.com&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=fba143c66abb81307a450679f38ab953fe96a413'>Diffstat</a> (limited to 'net')</div><table summary='diffstat' class='diffstat'><tr><td class='mode'>-rw-r--r--</td><td class='upd'><a href='/cgit.cgi/linux/net-next.git/diff/net/core/net_namespace.c?id=fba143c66abb81307a450679f38ab953fe96a413'>net/core/net_namespace.c</a></td><td class='right'>35</td><td class='graph'><table summary='file diffstat' width='35%'><tr><td class='add' style='width: 42.9%;'/><td class='rem' style='width: 57.1%;'/><td class='none' style='width: 0.0%;'/></tr></table></td></tr>
</table><div class='diffstat-summary'>1 files changed, 15 insertions, 20 deletions</div><table summary='diff' class='diff'><tr><td><div class='head'>diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c