~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/net/core/timestamping.c

Version: ~ [ linux-5.8 ] ~ [ linux-5.7.14 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.57 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.138 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.193 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.232 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.232 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.85 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 // SPDX-License-Identifier: GPL-2.0-or-later
  2 /*
  3  * PTP 1588 clock support - support for timestamping in PHY devices
  4  *
  5  * Copyright (C) 2010 OMICRON electronics GmbH
  6  */
  7 #include <linux/errqueue.h>
  8 #include <linux/phy.h>
  9 #include <linux/ptp_classify.h>
 10 #include <linux/skbuff.h>
 11 #include <linux/export.h>
 12 
 13 static unsigned int classify(const struct sk_buff *skb)
 14 {
 15         if (likely(skb->dev && skb->dev->phydev &&
 16                    skb->dev->phydev->mii_ts))
 17                 return ptp_classify_raw(skb);
 18         else
 19                 return PTP_CLASS_NONE;
 20 }
 21 
 22 void skb_clone_tx_timestamp(struct sk_buff *skb)
 23 {
 24         struct mii_timestamper *mii_ts;
 25         struct sk_buff *clone;
 26         unsigned int type;
 27 
 28         if (!skb->sk)
 29                 return;
 30 
 31         type = classify(skb);
 32         if (type == PTP_CLASS_NONE)
 33                 return;
 34 
 35         mii_ts = skb->dev->phydev->mii_ts;
 36         if (likely(mii_ts->txtstamp)) {
 37                 clone = skb_clone_sk(skb);
 38                 if (!clone)
 39                         return;
 40                 mii_ts->txtstamp(mii_ts, clone, type);
 41         }
 42 }
 43 EXPORT_SYMBOL_GPL(skb_clone_tx_timestamp);
 44 
 45 bool skb_defer_rx_timestamp(struct sk_buff *skb)
 46 {
 47         struct mii_timestamper *mii_ts;
 48         unsigned int type;
 49 
 50         if (!skb->dev || !skb->dev->phydev || !skb->dev->phydev->mii_ts)
 51                 return false;
 52 
 53         if (skb_headroom(skb) < ETH_HLEN)
 54                 return false;
 55 
 56         __skb_push(skb, ETH_HLEN);
 57 
 58         type = ptp_classify_raw(skb);
 59 
 60         __skb_pull(skb, ETH_HLEN);
 61 
 62         if (type == PTP_CLASS_NONE)
 63                 return false;
 64 
 65         mii_ts = skb->dev->phydev->mii_ts;
 66         if (likely(mii_ts->rxtstamp))
 67                 return mii_ts->rxtstamp(mii_ts, skb, type);
 68 
 69         return false;
 70 }
 71 EXPORT_SYMBOL_GPL(skb_defer_rx_timestamp);
 72 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp