/*
 *  net/dccp/diag.c
 *
 *  An implementation of the DCCP protocol
 *  Arnaldo Carvalho de Melo <acme@mandriva.com>
 *
 *	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.
 */


#include <linux/module.h>
#include <linux/inet_diag.h>

#include "ccid.h"
#include "dccp.h"

static void dccp_get_info(struct sock *sk, struct tcp_info *info)
{
	struct dccp_sock *dp = dccp_sk(sk);
	const struct inet_connection_sock *icsk = inet_csk(sk);

	memset(info, 0, sizeof(*info));

	info->tcpi_state	= sk->sk_state;
	info->tcpi_retransmits	= icsk->icsk_retransmits;
	info->tcpi_probes	= icsk->icsk_probes_out;
	info->tcpi_backoff	= icsk->icsk_backoff;
	info->tcpi_pmtu		= icsk->icsk_pmtu_cookie;

	if (dp->dccps_hc_rx_ackvec != NULL)
		info->tcpi_options |= TCPI_OPT_SACK;

	if (dp->dccps_hc_rx_ccid != NULL)
		ccid_hc_rx_get_info(dp->dccps_hc_rx_ccid, sk, info);

	if (dp->dccps_hc_tx_ccid != NULL)
		ccid_hc_tx_get_info(dp->dccps_hc_tx_ccid, sk, info);
}

static void dccp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
			       void *_info)
{
	r->idiag_rqueue = r->idiag_wqueue = 0;

	if (_info != NULL)
		dccp_get_info(sk, _info);
}

static void dccp_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
			   const struct inet_diag_req_v2 *r, struct nlattr *bc)
{
	inet_diag_dump_icsk(&dccp_hashinfo, skb, cb, r, bc);
}

static int dccp_diag_dump_one(struct sk_buff *in_skb,
			      const struct nlmsghdr *nlh,
			      const struct inet_diag_req_v2 *req)
{
	return inet_diag_dump_one_icsk(&dccp_hashinfo, in_skb, nlh, req);
}

static const struct inet_diag_handler dccp_diag_handler = {
	.dump		 = dccp_diag_dump,
	.dump_one	 = dccp_diag_dump_one,
	.idiag_get_info	 = dccp_diag_get_info,
	.idiag_type	 = IPPROTO_DCCP,
	.idiag_info_size = sizeof(struct tcp_info),
};

static int __init dccp_diag_init(void)
{
	return inet_diag_register(&dccp_diag_handler);
}

static void __exit dccp_diag_fini(void)
{
	inet_diag_unregister(&dccp_diag_handler);
}

module_init(dccp_diag_init);
module_exit(dccp_diag_fini);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@mandriva.com>");
MODULE_DESCRIPTION("DCCP inet_diag handler");
MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2-33 /* AF_INET - IPPROTO_DCCP */);
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=f2600cf02b5b59aaee082c3485b7f01fc7f7b70c'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include?id=f2600cf02b5b59aaee082c3485b7f01fc7f7b70c'>include</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/net?id=f2600cf02b5b59aaee082c3485b7f01fc7f7b70c'>net</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/net/pkt_sched.h?id=f2600cf02b5b59aaee082c3485b7f01fc7f7b70c'>pkt_sched.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='f2600cf02b5b59aaee082c3485b7f01fc7f7b70c'/><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>Eric Dumazet &lt;edumazet@google.com&gt;</td><td class='right'>2014-10-04 10:11:31 -0700</td></tr>
<tr><th>committer</th><td>David S. Miller &lt;davem@davemloft.net&gt;</td><td class='right'>2014-10-06 00:55:10 -0400</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/net/pkt_sched.h?id=f2600cf02b5b59aaee082c3485b7f01fc7f7b70c'>f2600cf02b5b59aaee082c3485b7f01fc7f7b70c</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/net/pkt_sched.h?id=f2600cf02b5b59aaee082c3485b7f01fc7f7b70c'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=f2600cf02b5b59aaee082c3485b7f01fc7f7b70c'>f38d692c3f706ead3d0cfd77b216fbd629a22964</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/net/pkt_sched.h?id=f2600cf02b5b59aaee082c3485b7f01fc7f7b70c'>include/net/pkt_sched.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/net/pkt_sched.h?id=681d2421e1135b95f5cd9d16fe10eac7f570a9f2'>681d2421e1135b95f5cd9d16fe10eac7f570a9f2</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/net/pkt_sched.h?id=f2600cf02b5b59aaee082c3485b7f01fc7f7b70c&amp;id2=681d2421e1135b95f5cd9d16fe10eac7f570a9f2'>diff</a>)</td></tr></table>
<div class='commit-subject'>net: sched: avoid costly atomic operation in fq_dequeue()</div><div class='commit-msg'>Standard qdisc API to setup a timer implies an atomic operation on every
packet dequeue : qdisc_unthrottled()

It turns out this is not really needed for FQ, as FQ has no concept of
global qdisc throttling, being a qdisc handling many different flows,
some of them can be throttled, while others are not.

Fix is straightforward : add a 'bool throttle' to
qdisc_watchdog_schedule_ns(), and remove calls to qdisc_unthrottled()
in sch_fq.

Signed-off-by: Eric Dumazet &lt;edumazet@google.com&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=f2600cf02b5b59aaee082c3485b7f01fc7f7b70c'>Diffstat</a> (limited to 'include/net/pkt_sched.h')</div><table summary='diffstat' class='diffstat'>