/*
 * 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 */
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=0b75f821ec8be459dd4dec77be39595d989d77ac'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/fs?id=0b75f821ec8be459dd4dec77be39595d989d77ac'>fs</a>/<a href='/cgit.cgi/linux/net-next.git/commit/fs/xfs?id=0b75f821ec8be459dd4dec77be39595d989d77ac'>xfs</a>/<a href='/cgit.cgi/linux/net-next.git/commit/fs/xfs/libxfs?id=0b75f821ec8be459dd4dec77be39595d989d77ac'>libxfs</a>/<a href='/cgit.cgi/linux/net-next.git/commit/fs/xfs/libxfs/xfs_btree.h?id=0b75f821ec8be459dd4dec77be39595d989d77ac'>xfs_btree.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='0b75f821ec8be459dd4dec77be39595d989d77ac'/><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>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-18 11:12:13 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-18 11:12:13 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/fs/xfs/libxfs/xfs_btree.h?id=0b75f821ec8be459dd4dec77be39595d989d77ac'>0b75f821ec8be459dd4dec77be39595d989d77ac</a> (<a href='/cgit.cgi/linux/net-next.git/patch/fs/xfs/libxfs/xfs_btree.h?id=0b75f821ec8be459dd4dec77be39595d989d77ac'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=0b75f821ec8be459dd4dec77be39595d989d77ac'>8d5e5132ddf28928d44347c78102233b042f480e</a> /<a href='/cgit.cgi/linux/net-next.git/tree/fs/xfs/libxfs/xfs_btree.h?id=0b75f821ec8be459dd4dec77be39595d989d77ac'>fs/xfs/libxfs/xfs_btree.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/fs/xfs/libxfs/xfs_btree.h?id=49b550fee80b5f36b961640666f7945d7ec63000'>49b550fee80b5f36b961640666f7945d7ec63000</a> (<a href='/cgit.cgi/linux/net-next.git/diff/fs/xfs/libxfs/xfs_btree.h?id=0b75f821ec8be459dd4dec77be39595d989d77ac&amp;id2=49b550fee80b5f36b961640666f7945d7ec63000'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/fs/xfs/libxfs/xfs_btree.h?id=bc7c36eedb0c7004aa06c2afc3c5385adada8fa3'>bc7c36eedb0c7004aa06c2afc3c5385adada8fa3</a> (<a href='/cgit.cgi/linux/net-next.git/diff/fs/xfs/libxfs/xfs_btree.h?id=0b75f821ec8be459dd4dec77be39595d989d77ac&amp;id2=bc7c36eedb0c7004aa06c2afc3c5385adada8fa3'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip</div><div class='commit-msg'>Pull timer fix from Ingo Molnar:
 "Fix a crash in the ARM-Exynos clocksource driver, triggered by CPU
  hotplug operations"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  clocksource/exynos_mct: Clear interrupt when cpu is shut down
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=0b75f821ec8be459dd4dec77be39595d989d77ac'>Diffstat</a> (limited to 'fs/xfs/libxfs/xfs_btree.h')</div><table summary='diffstat' class='diffstat'>