/*
 * net/sched/act_meta_tc_index.c IFE skb->tc_index metadata module
 *
 *		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.
 *
 * copyright Jamal Hadi Salim (2016)
 *
*/

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/skbuff.h>
#include <linux/rtnetlink.h>
#include <linux/module.h>
#include <linux/init.h>
#include <net/netlink.h>
#include <net/pkt_sched.h>
#include <uapi/linux/tc_act/tc_ife.h>
#include <net/tc_act/tc_ife.h>
#include <linux/rtnetlink.h>

static int skbtcindex_encode(struct sk_buff *skb, void *skbdata,
			     struct tcf_meta_info *e)
{
	u32 ifetc_index = skb->tc_index;

	return ife_encode_meta_u16(ifetc_index, skbdata, e);
}

static int skbtcindex_decode(struct sk_buff *skb, void *data, u16 len)
{
	u16 ifetc_index = *(u16 *)data;

	skb->tc_index = ntohs(ifetc_index);
	return 0;
}

static int skbtcindex_check(struct sk_buff *skb, struct tcf_meta_info *e)
{
	return ife_check_meta_u16(skb->tc_index, e);
}

static struct tcf_meta_ops ife_skbtcindex_ops = {
	.metaid = IFE_META_TCINDEX,
	.metatype = NLA_U16,
	.name = "tc_index",
	.synopsis = "skb tc_index 16 bit metadata",
	.check_presence = skbtcindex_check,
	.encode = skbtcindex_encode,
	.decode = skbtcindex_decode,
	.get = ife_get_meta_u16,
	.alloc = ife_alloc_meta_u16,
	.release = ife_release_meta_gen,
	.validate = ife_validate_meta_u16,
	.owner = THIS_MODULE,
};

static int __init ifetc_index_init_module(void)
{
	return register_ife_op(&ife_skbtcindex_ops);
}

static void __exit ifetc_index_cleanup_module(void)
{
	unregister_ife_op(&ife_skbtcindex_ops);
}

module_init(ifetc_index_init_module);
module_exit(ifetc_index_cleanup_module);

MODULE_AUTHOR("Jamal Hadi Salim(2016)");
MODULE_DESCRIPTION("Inter-FE skb tc_index metadata module");
MODULE_LICENSE("GPL");
MODULE_ALIAS_IFE_META(IFE_META_SKBTCINDEX);
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>net</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/xfrm?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>xfrm</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/xfrm/Makefile?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>Makefile</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'/><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>Steven Rostedt (VMware) &lt;rostedt@goodmis.org&gt;</td><td class='right'>2017-01-30 19:27:10 -0500</td></tr>
<tr><th>committer</th><td>Steven Rostedt (VMware) &lt;rostedt@goodmis.org&gt;</td><td class='right'>2017-01-31 09:13:49 -0500</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/xfrm/Makefile?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>79c6f448c8b79c321e4a1f31f98194e4f6b6cae7</a> (<a href='/cgit.cgi/linux/net-next.git/patch/net/xfrm/Makefile?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>370efda701f03cccf21e02bb1fdd3b852547d75c</a> /<a href='/cgit.cgi/linux/net-next.git/tree/net/xfrm/Makefile?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>net/xfrm/Makefile</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/xfrm/Makefile?id=0c744ea4f77d72b3dcebb7a8f2684633ec79be88'>0c744ea4f77d72b3dcebb7a8f2684633ec79be88</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/xfrm/Makefile?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7&amp;id2=0c744ea4f77d72b3dcebb7a8f2684633ec79be88'>diff</a>)</td></tr></table>
<div class='commit-subject'>tracing: Fix hwlat kthread migration</div><div class='commit-msg'>The hwlat tracer creates a kernel thread at start of the tracer. It is
pinned to a single CPU and will move to the next CPU after each period of
running. If the user modifies the migration thread's affinity, it will not
change after that happens.

The original code created the thread at the first instance it was called,
but later was changed to destroy the thread after the tracer was finished,
and would not be created until the next instance of the tracer was
established. The code that initialized the affinity was only called on the
initial instantiation of the tracer. After that, it was not initialized, and
the previous affinity did not match the current newly created one, making
it appear that the user modified the thread's affinity when it did not, and
the thread failed to migrate again.

Cc: stable@vger.kernel.org
Fixes: 0330f7aa8ee6 ("tracing: Have hwlat trace migrate across tracing_cpumask CPUs")
Signed-off-by: Steven Rostedt (VMware) &lt;rostedt@goodmis.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>Diffstat</a> (limited to 'net/xfrm/Makefile')</div><table summary='diffstat' class='diffstat'>