/*
 * cls_cgroup.h			Control Group Classifier
 *
 * Authors:	Thomas Graf <tgraf@suug.ch>
 *
 * 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.
 *
 */

#ifndef _NET_CLS_CGROUP_H
#define _NET_CLS_CGROUP_H

#include <linux/cgroup.h>
#include <linux/hardirq.h>
#include <linux/rcupdate.h>
#include <net/sock.h>
#include <net/inet_sock.h>

#ifdef CONFIG_CGROUP_NET_CLASSID
struct cgroup_cls_state {
	struct cgroup_subsys_state css;
	u32 classid;
};

struct cgroup_cls_state *task_cls_state(struct task_struct *p);

static inline u32 task_cls_classid(struct task_struct *p)
{
	u32 classid;

	if (in_interrupt())
		return 0;

	rcu_read_lock();
	classid = container_of(task_css(p, net_cls_cgrp_id),
			       struct cgroup_cls_state, css)->classid;
	rcu_read_unlock();

	return classid;
}

static inline void sock_update_classid(struct sock_cgroup_data *skcd)
{
	u32 classid;

	classid = task_cls_classid(current);
	sock_cgroup_set_classid(skcd, classid);
}

static inline u32 task_get_classid(const struct sk_buff *skb)
{
	u32 classid = task_cls_state(current)->classid;

	/* Due to the nature of the classifier it is required to ignore all
	 * packets originating from softirq context as accessing `current'
	 * would lead to false results.
	 *
	 * This test assumes that all callers of dev_queue_xmit() explicitly
	 * disable bh. Knowing this, it is possible to detect softirq based
	 * calls by looking at the number of nested bh disable calls because
	 * softirqs always disables bh.
	 */
	if (in_serving_softirq()) {
		struct sock *sk = skb_to_full_sk(skb);

		/* If there is an sock_cgroup_classid we'll use that. */
		if (!sk || !sk_fullsock(sk))
			return 0;

		classid = sock_cgroup_classid(&sk->sk_cgrp_data);
	}

	return classid;
}
#else /* !CONFIG_CGROUP_NET_CLASSID */
static inline void sock_update_classid(struct sock_cgroup_data *skcd)
{
}

static inline u32 task_get_classid(const struct sk_buff *skb)
{
	return 0;
}
#endif /* CONFIG_CGROUP_NET_CLASSID */
#endif  /* _NET_CLS_CGROUP_H */
sb/serial?h=nds-private-remove&amp;id=b32728ffef7f233dbdabb3f11814bdf692aaf501'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/drivers/usb/serial'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=b32728ffef7f233dbdabb3f11814bdf692aaf501'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers?h=nds-private-remove&amp;id=b32728ffef7f233dbdabb3f11814bdf692aaf501'>drivers</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb?h=nds-private-remove&amp;id=b32728ffef7f233dbdabb3f11814bdf692aaf501'>usb</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/serial?h=nds-private-remove&amp;id=b32728ffef7f233dbdabb3f11814bdf692aaf501'>serial</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='b32728ffef7f233dbdabb3f11814bdf692aaf501'/><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>Jan Beulich &lt;JBeulich@suse.com&gt;</td><td class='right'>2017-01-23 08:12:19 -0700</td></tr>
<tr><th>committer</th><td>Konrad Rzeszutek Wilk &lt;konrad.wilk@oracle.com&gt;</td><td class='right'>2017-01-23 13:27:41 -0500</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/serial?h=nds-private-remove&amp;id=b32728ffef7f233dbdabb3f11814bdf692aaf501'>b32728ffef7f233dbdabb3f11814bdf692aaf501</a> (<a href='/cgit.cgi/linux/net-next.git/patch/drivers/usb/serial?id=b32728ffef7f233dbdabb3f11814bdf692aaf501'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=b32728ffef7f233dbdabb3f11814bdf692aaf501'>5bf0326545d0c4525a43f3c50cfcdef09f0baa88</a> /<a href='/cgit.cgi/linux/net-next.git/tree/drivers/usb/serial?h=nds-private-remove&amp;id=b32728ffef7f233dbdabb3f11814bdf692aaf501'>drivers/usb/serial</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/serial?h=nds-private-remove&amp;id=d61b7f972dab2a7d187c38254845546dfc8eed85'>d61b7f972dab2a7d187c38254845546dfc8eed85</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/serial?h=nds-private-remove&amp;id=b32728ffef7f233dbdabb3f11814bdf692aaf501&amp;id2=d61b7f972dab2a7d187c38254845546dfc8eed85'>diff</a>)</td></tr></table>
<div class='commit-subject'>xen-blkfront: feature flags handling adjustments</div><div class='commit-msg'>Don't truncate the "feature-persistent" value read from xenstore: Any
non-zero value is supposed to enable the feature, just like is already
being done for feature_secdiscard.

Just like the other feature_* fields, feature_flush and feature_fua are
boolean flags, and hence fit well into a single bit.

Keep all bit fields together to limit gaps.

Signed-off-by: Jan Beulich &lt;jbeulich@suse.com&gt;
Signed-off-by: Konrad Rzeszutek Wilk &lt;konrad.wilk@oracle.com&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=b32728ffef7f233dbdabb3f11814bdf692aaf501'>Diffstat</a> (limited to 'drivers/usb/serial')</div><table summary='diffstat' class='diffstat'>