timestamping.c (da733563be5a9da26fe81d9f007262d00b846e22) timestamping.c (e62d2df084e2849edffb206559725fa81bb569a8)
1/*
2 * PTP 1588 clock support - support for timestamping in PHY devices
3 *
4 * Copyright (C) 2010 OMICRON electronics GmbH
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or

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18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20#include <linux/errqueue.h>
21#include <linux/phy.h>
22#include <linux/ptp_classify.h>
23#include <linux/skbuff.h>
24#include <linux/export.h>
25
1/*
2 * PTP 1588 clock support - support for timestamping in PHY devices
3 *
4 * Copyright (C) 2010 OMICRON electronics GmbH
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or

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18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20#include <linux/errqueue.h>
21#include <linux/phy.h>
22#include <linux/ptp_classify.h>
23#include <linux/skbuff.h>
24#include <linux/export.h>
25
26static struct sock_filter ptp_filter[] = {
27 PTP_FILTER
28};
26static struct sk_filter *ptp_insns __read_mostly;
29
30static unsigned int classify(const struct sk_buff *skb)
31{
27
28static unsigned int classify(const struct sk_buff *skb)
29{
32 if (likely(skb->dev &&
33 skb->dev->phydev &&
30 if (likely(skb->dev && skb->dev->phydev &&
34 skb->dev->phydev->drv))
31 skb->dev->phydev->drv))
35 return sk_run_filter(skb, ptp_filter);
32 return SK_RUN_FILTER(ptp_insns, skb);
36 else
37 return PTP_CLASS_NONE;
38}
39
40void skb_clone_tx_timestamp(struct sk_buff *skb)
41{
42 struct phy_device *phydev;
43 struct sk_buff *clone;

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55 case PTP_CLASS_V2_IPV4:
56 case PTP_CLASS_V2_IPV6:
57 case PTP_CLASS_V2_L2:
58 case PTP_CLASS_V2_VLAN:
59 phydev = skb->dev->phydev;
60 if (likely(phydev->drv->txtstamp)) {
61 if (!atomic_inc_not_zero(&sk->sk_refcnt))
62 return;
33 else
34 return PTP_CLASS_NONE;
35}
36
37void skb_clone_tx_timestamp(struct sk_buff *skb)
38{
39 struct phy_device *phydev;
40 struct sk_buff *clone;

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52 case PTP_CLASS_V2_IPV4:
53 case PTP_CLASS_V2_IPV6:
54 case PTP_CLASS_V2_L2:
55 case PTP_CLASS_V2_VLAN:
56 phydev = skb->dev->phydev;
57 if (likely(phydev->drv->txtstamp)) {
58 if (!atomic_inc_not_zero(&sk->sk_refcnt))
59 return;
60
63 clone = skb_clone(skb, GFP_ATOMIC);
64 if (!clone) {
65 sock_put(sk);
66 return;
67 }
61 clone = skb_clone(skb, GFP_ATOMIC);
62 if (!clone) {
63 sock_put(sk);
64 return;
65 }
66
68 clone->sk = sk;
69 phydev->drv->txtstamp(phydev, clone, type);
70 }
71 break;
72 default:
73 break;
74 }
75}

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84
85 if (!hwtstamps) {
86 sock_put(sk);
87 kfree_skb(skb);
88 return;
89 }
90
91 *skb_hwtstamps(skb) = *hwtstamps;
67 clone->sk = sk;
68 phydev->drv->txtstamp(phydev, clone, type);
69 }
70 break;
71 default:
72 break;
73 }
74}

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83
84 if (!hwtstamps) {
85 sock_put(sk);
86 kfree_skb(skb);
87 return;
88 }
89
90 *skb_hwtstamps(skb) = *hwtstamps;
91
92 serr = SKB_EXT_ERR(skb);
93 memset(serr, 0, sizeof(*serr));
94 serr->ee.ee_errno = ENOMSG;
95 serr->ee.ee_origin = SO_EE_ORIGIN_TIMESTAMPING;
96 skb->sk = NULL;
92 serr = SKB_EXT_ERR(skb);
93 memset(serr, 0, sizeof(*serr));
94 serr->ee.ee_errno = ENOMSG;
95 serr->ee.ee_origin = SO_EE_ORIGIN_TIMESTAMPING;
96 skb->sk = NULL;
97
97 err = sock_queue_err_skb(sk, skb);
98 err = sock_queue_err_skb(sk, skb);
99
98 sock_put(sk);
99 if (err)
100 kfree_skb(skb);
101}
102EXPORT_SYMBOL_GPL(skb_complete_tx_timestamp);
103
104bool skb_defer_rx_timestamp(struct sk_buff *skb)
105{

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130 }
131
132 return false;
133}
134EXPORT_SYMBOL_GPL(skb_defer_rx_timestamp);
135
136void __init skb_timestamping_init(void)
137{
100 sock_put(sk);
101 if (err)
102 kfree_skb(skb);
103}
104EXPORT_SYMBOL_GPL(skb_complete_tx_timestamp);
105
106bool skb_defer_rx_timestamp(struct sk_buff *skb)
107{

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132 }
133
134 return false;
135}
136EXPORT_SYMBOL_GPL(skb_defer_rx_timestamp);
137
138void __init skb_timestamping_init(void)
139{
138 BUG_ON(sk_chk_filter(ptp_filter, ARRAY_SIZE(ptp_filter)));
140 static struct sock_filter ptp_filter[] = { PTP_FILTER };
141 struct sock_fprog ptp_prog = {
142 .len = ARRAY_SIZE(ptp_filter), .filter = ptp_filter,
143 };
144
145 BUG_ON(sk_unattached_filter_create(&ptp_insns, &ptp_prog));
139}
146}