/*
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/*
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* NET3 Protocol independent device support routines.
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* NET3 Protocol independent device support routines.
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*
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*
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* This program is free software; you can redistribute it and/or
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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* 2 of the License, or (at your option) any later version.
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*
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*
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* Derived from the non IP parts of dev.c 1.0.19
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* Derived from the non IP parts of dev.c 1.0.19
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* Authors: Ross Biro, <bir7@leland.Stanford.Edu>
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* Authors: Ross Biro, <bir7@leland.Stanford.Edu>
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* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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* Mark Evans, <evansmp@uhura.aston.ac.uk>
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* Mark Evans, <evansmp@uhura.aston.ac.uk>
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*
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*
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* Additional Authors:
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* Additional Authors:
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* Florian la Roche <rzsfl@rz.uni-sb.de>
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* Florian la Roche <rzsfl@rz.uni-sb.de>
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* Alan Cox <gw4pts@gw4pts.ampr.org>
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* Alan Cox <gw4pts@gw4pts.ampr.org>
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* David Hinds <dahinds@users.sourceforge.net>
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* David Hinds <dahinds@users.sourceforge.net>
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* Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
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* Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
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* Adam Sulmicki <adam@cfar.umd.edu>
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* Adam Sulmicki <adam@cfar.umd.edu>
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* Pekka Riikonen <priikone@poesidon.pspt.fi>
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* Pekka Riikonen <priikone@poesidon.pspt.fi>
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*
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*
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* Changes:
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* Changes:
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* D.J. Barrow : Fixed bug where dev->refcnt gets set to 2
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* D.J. Barrow : Fixed bug where dev->refcnt gets set to 2
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* if register_netdev gets called before
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* if register_netdev gets called before
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* net_dev_init & also removed a few lines
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* net_dev_init & also removed a few lines
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* of code in the process.
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* of code in the process.
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* Alan Cox : device private ioctl copies fields back.
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* Alan Cox : device private ioctl copies fields back.
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* Alan Cox : Transmit queue code does relevant stunts to
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* Alan Cox : Transmit queue code does relevant stunts to
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* keep the queue safe.
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* keep the queue safe.
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* Alan Cox : Fixed double lock.
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* Alan Cox : Fixed double lock.
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* Alan Cox : Fixed promisc NULL pointer trap
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* Alan Cox : Fixed promisc NULL pointer trap
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* ???????? : Support the full private ioctl range
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* ???????? : Support the full private ioctl range
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* Alan Cox : Moved ioctl permission check into drivers
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* Alan Cox : Moved ioctl permission check into drivers
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* Tim Kordas : SIOCADDMULTI/SIOCDELMULTI
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* Tim Kordas : SIOCADDMULTI/SIOCDELMULTI
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* Alan Cox : 100 backlog just doesn't cut it when
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* Alan Cox : 100 backlog just doesn't cut it when
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* you start doing multicast video 8)
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* you start doing multicast video 8)
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* Alan Cox : Rewrote net_bh and list manager.
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* Alan Cox : Rewrote net_bh and list manager.
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* Alan Cox : Fix ETH_P_ALL echoback lengths.
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* Alan Cox : Fix ETH_P_ALL echoback lengths.
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* Alan Cox : Took out transmit every packet pass
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* Alan Cox : Took out transmit every packet pass
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* Saved a few bytes in the ioctl handler
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* Saved a few bytes in the ioctl handler
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* Alan Cox : Network driver sets packet type before calling netif_rx. Saves
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* Alan Cox : Network driver sets packet type before calling netif_rx. Saves
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* a function call a packet.
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* a function call a packet.
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* Alan Cox : Hashed net_bh()
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* Alan Cox : Hashed net_bh()
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* Richard Kooijman: Timestamp fixes.
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* Richard Kooijman: Timestamp fixes.
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* Alan Cox : Wrong field in SIOCGIFDSTADDR
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* Alan Cox : Wrong field in SIOCGIFDSTADDR
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* Alan Cox : Device lock protection.
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* Alan Cox : Device lock protection.
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* Alan Cox : Fixed nasty side effect of device close changes.
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* Alan Cox : Fixed nasty side effect of device close changes.
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* Rudi Cilibrasi : Pass the right thing to set_mac_address()
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* Rudi Cilibrasi : Pass the right thing to set_mac_address()
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* Dave Miller : 32bit quantity for the device lock to make it work out
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* Dave Miller : 32bit quantity for the device lock to make it work out
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* on a Sparc.
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* on a Sparc.
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* Bjorn Ekwall : Added KERNELD hack.
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* Bjorn Ekwall : Added KERNELD hack.
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* Alan Cox : Cleaned up the backlog initialise.
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* Alan Cox : Cleaned up the backlog initialise.
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* Craig Metz : SIOCGIFCONF fix if space for under
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* Craig Metz : SIOCGIFCONF fix if space for under
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* 1 device.
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* 1 device.
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* Thomas Bogendoerfer : Return ENODEV for dev_open, if there
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* Thomas Bogendoerfer : Return ENODEV for dev_open, if there
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* is no device open function.
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* is no device open function.
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* Andi Kleen : Fix error reporting for SIOCGIFCONF
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* Andi Kleen : Fix error reporting for SIOCGIFCONF
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* Michael Chastain : Fix signed/unsigned for SIOCGIFCONF
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* Michael Chastain : Fix signed/unsigned for SIOCGIFCONF
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* Cyrus Durgin : Cleaned for KMOD
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* Cyrus Durgin : Cleaned for KMOD
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* Adam Sulmicki : Bug Fix : Network Device Unload
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* Adam Sulmicki : Bug Fix : Network Device Unload
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* A network device unload needs to purge
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* A network device unload needs to purge
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* the backlog queue.
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* the backlog queue.
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* Paul Rusty Russell : SIOCSIFNAME
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* Paul Rusty Russell : SIOCSIFNAME
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* Pekka Riikonen : Netdev boot-time settings code
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* Pekka Riikonen : Netdev boot-time settings code
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* Andrew Morton : Make unregister_netdevice wait indefinitely on dev->refcnt
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* Andrew Morton : Make unregister_netdevice wait indefinitely on dev->refcnt
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* J Hadi Salim : - Backlog queue sampling
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* J Hadi Salim : - Backlog queue sampling
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* - netif_rx() feedback
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* - netif_rx() feedback
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*/
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*/
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|
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#include <asm/uaccess.h>
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#include <asm/uaccess.h>
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#include <asm/system.h>
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#include <asm/system.h>
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#include <asm/bitops.h>
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#include <asm/bitops.h>
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#include <linux/config.h>
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#include <linux/config.h>
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#include <linux/types.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/sched.h>
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#include <linux/string.h>
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#include <linux/string.h>
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#include <linux/mm.h>
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#include <linux/mm.h>
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#include <linux/socket.h>
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#include <linux/socket.h>
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#include <linux/sockios.h>
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#include <linux/sockios.h>
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#include <linux/errno.h>
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#include <linux/errno.h>
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#include <linux/interrupt.h>
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#include <linux/interrupt.h>
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#include <linux/if_ether.h>
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#include <linux/if_ether.h>
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#include <linux/netdevice.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/notifier.h>
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#include <linux/notifier.h>
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#include <linux/skbuff.h>
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#include <linux/skbuff.h>
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#include <linux/brlock.h>
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#include <linux/brlock.h>
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#include <net/sock.h>
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#include <net/sock.h>
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#include <linux/rtnetlink.h>
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#include <linux/rtnetlink.h>
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#include <linux/proc_fs.h>
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#include <linux/proc_fs.h>
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#include <linux/stat.h>
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#include <linux/stat.h>
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#include <linux/if_bridge.h>
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#include <linux/if_bridge.h>
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#include <linux/divert.h>
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#include <linux/divert.h>
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#include <net/dst.h>
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#include <net/dst.h>
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#include <net/pkt_sched.h>
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#include <net/pkt_sched.h>
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#include <net/profile.h>
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#include <net/profile.h>
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#include <net/checksum.h>
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#include <net/checksum.h>
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#include <linux/highmem.h>
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#include <linux/highmem.h>
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#include <linux/init.h>
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#include <linux/init.h>
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#include <linux/kmod.h>
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#include <linux/kmod.h>
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#include <linux/module.h>
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#include <linux/module.h>
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#if defined(CONFIG_NET_RADIO) || defined(CONFIG_NET_PCMCIA_RADIO)
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#if defined(CONFIG_NET_RADIO) || defined(CONFIG_NET_PCMCIA_RADIO)
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#include <linux/wireless.h> /* Note : will define WIRELESS_EXT */
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#include <linux/wireless.h> /* Note : will define WIRELESS_EXT */
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#include <net/iw_handler.h>
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#include <net/iw_handler.h>
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#endif /* CONFIG_NET_RADIO || CONFIG_NET_PCMCIA_RADIO */
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#endif /* CONFIG_NET_RADIO || CONFIG_NET_PCMCIA_RADIO */
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#ifdef CONFIG_PLIP
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#ifdef CONFIG_PLIP
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extern int plip_init(void);
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extern int plip_init(void);
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#endif
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#endif
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|
|
|
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/* This define, if set, will randomly drop a packet when congestion
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/* This define, if set, will randomly drop a packet when congestion
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* is more than moderate. It helps fairness in the multi-interface
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* is more than moderate. It helps fairness in the multi-interface
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* case when one of them is a hog, but it kills performance for the
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* case when one of them is a hog, but it kills performance for the
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* single interface case so it is off now by default.
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* single interface case so it is off now by default.
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*/
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*/
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#undef RAND_LIE
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#undef RAND_LIE
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|
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/* Setting this will sample the queue lengths and thus congestion
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/* Setting this will sample the queue lengths and thus congestion
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* via a timer instead of as each packet is received.
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* via a timer instead of as each packet is received.
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*/
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*/
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#undef OFFLINE_SAMPLE
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#undef OFFLINE_SAMPLE
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|
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NET_PROFILE_DEFINE(dev_queue_xmit)
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NET_PROFILE_DEFINE(dev_queue_xmit)
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NET_PROFILE_DEFINE(softnet_process)
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NET_PROFILE_DEFINE(softnet_process)
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|
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const char *if_port_text[] = {
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const char *if_port_text[] = {
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"unknown",
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"unknown",
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"BNC",
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"BNC",
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"10baseT",
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"10baseT",
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"AUI",
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"AUI",
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"100baseT",
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"100baseT",
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"100baseTX",
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"100baseTX",
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"100baseFX"
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"100baseFX"
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};
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};
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|
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/*
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/*
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* The list of packet types we will receive (as opposed to discard)
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* The list of packet types we will receive (as opposed to discard)
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* and the routines to invoke.
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* and the routines to invoke.
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*
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*
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* Why 16. Because with 16 the only overlap we get on a hash of the
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* Why 16. Because with 16 the only overlap we get on a hash of the
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* low nibble of the protocol value is RARP/SNAP/X.25.
|
* low nibble of the protocol value is RARP/SNAP/X.25.
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*
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*
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* NOTE: That is no longer true with the addition of VLAN tags. Not
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* NOTE: That is no longer true with the addition of VLAN tags. Not
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* sure which should go first, but I bet it won't make much
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* sure which should go first, but I bet it won't make much
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* difference if we are running VLANs. The good news is that
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* difference if we are running VLANs. The good news is that
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* this protocol won't be in the list unless compiled in, so
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* this protocol won't be in the list unless compiled in, so
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* the average user (w/out VLANs) will not be adversly affected.
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* the average user (w/out VLANs) will not be adversly affected.
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* --BLG
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* --BLG
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*
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*
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* 0800 IP
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* 0800 IP
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* 8100 802.1Q VLAN
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* 8100 802.1Q VLAN
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* 0001 802.3
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* 0001 802.3
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* 0002 AX.25
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* 0002 AX.25
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* 0004 802.2
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* 0004 802.2
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* 8035 RARP
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* 8035 RARP
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* 0005 SNAP
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* 0005 SNAP
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* 0805 X.25
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* 0805 X.25
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* 0806 ARP
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* 0806 ARP
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* 8137 IPX
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* 8137 IPX
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* 0009 Localtalk
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* 0009 Localtalk
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* 86DD IPv6
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* 86DD IPv6
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*/
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*/
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|
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static struct packet_type *ptype_base[16]; /* 16 way hashed list */
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static struct packet_type *ptype_base[16]; /* 16 way hashed list */
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static struct packet_type *ptype_all = NULL; /* Taps */
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static struct packet_type *ptype_all = NULL; /* Taps */
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|
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#ifdef OFFLINE_SAMPLE
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#ifdef OFFLINE_SAMPLE
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static void sample_queue(unsigned long dummy);
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static void sample_queue(unsigned long dummy);
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static struct timer_list samp_timer = { function: sample_queue };
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static struct timer_list samp_timer = { function: sample_queue };
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#endif
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#endif
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|
|
#ifdef CONFIG_HOTPLUG
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#ifdef CONFIG_HOTPLUG
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static int net_run_sbin_hotplug(struct net_device *dev, char *action);
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static int net_run_sbin_hotplug(struct net_device *dev, char *action);
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#else
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#else
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#define net_run_sbin_hotplug(dev, action) ({ 0; })
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#define net_run_sbin_hotplug(dev, action) ({ 0; })
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#endif
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#endif
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|
|
/*
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/*
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* Our notifier list
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* Our notifier list
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*/
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*/
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|
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static struct notifier_block *netdev_chain=NULL;
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static struct notifier_block *netdev_chain=NULL;
|
|
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/*
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/*
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* Device drivers call our routines to queue packets here. We empty the
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* Device drivers call our routines to queue packets here. We empty the
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* queue in the local softnet handler.
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* queue in the local softnet handler.
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*/
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*/
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struct softnet_data softnet_data[NR_CPUS] __cacheline_aligned;
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struct softnet_data softnet_data[NR_CPUS] __cacheline_aligned;
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|
|
#ifdef CONFIG_NET_FASTROUTE
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#ifdef CONFIG_NET_FASTROUTE
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int netdev_fastroute;
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int netdev_fastroute;
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int netdev_fastroute_obstacles;
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int netdev_fastroute_obstacles;
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#endif
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#endif
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|
|
|
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/******************************************************************************************
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/******************************************************************************************
|
|
|
Protocol management and registration routines
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Protocol management and registration routines
|
|
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*******************************************************************************************/
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*******************************************************************************************/
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|
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/*
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/*
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* For efficiency
|
* For efficiency
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*/
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*/
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|
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int netdev_nit=0;
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int netdev_nit=0;
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|
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/*
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/*
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* Add a protocol ID to the list. Now that the input handler is
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* Add a protocol ID to the list. Now that the input handler is
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* smarter we can dispense with all the messy stuff that used to be
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* smarter we can dispense with all the messy stuff that used to be
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* here.
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* here.
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*
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*
|
* BEWARE!!! Protocol handlers, mangling input packets,
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* BEWARE!!! Protocol handlers, mangling input packets,
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* MUST BE last in hash buckets and checking protocol handlers
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* MUST BE last in hash buckets and checking protocol handlers
|
* MUST start from promiscous ptype_all chain in net_bh.
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* MUST start from promiscous ptype_all chain in net_bh.
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* It is true now, do not change it.
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* It is true now, do not change it.
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* Explantion follows: if protocol handler, mangling packet, will
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* Explantion follows: if protocol handler, mangling packet, will
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* be the first on list, it is not able to sense, that packet
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* be the first on list, it is not able to sense, that packet
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* is cloned and should be copied-on-write, so that it will
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* is cloned and should be copied-on-write, so that it will
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* change it and subsequent readers will get broken packet.
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* change it and subsequent readers will get broken packet.
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* --ANK (980803)
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* --ANK (980803)
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*/
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*/
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|
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/**
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/**
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* dev_add_pack - add packet handler
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* dev_add_pack - add packet handler
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* @pt: packet type declaration
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* @pt: packet type declaration
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*
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*
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* Add a protocol handler to the networking stack. The passed &packet_type
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* Add a protocol handler to the networking stack. The passed &packet_type
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* is linked into kernel lists and may not be freed until it has been
|
* is linked into kernel lists and may not be freed until it has been
|
* removed from the kernel lists.
|
* removed from the kernel lists.
|
*/
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*/
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|
|
void dev_add_pack(struct packet_type *pt)
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void dev_add_pack(struct packet_type *pt)
|
{
|
{
|
int hash;
|
int hash;
|
|
|
br_write_lock_bh(BR_NETPROTO_LOCK);
|
br_write_lock_bh(BR_NETPROTO_LOCK);
|
|
|
#ifdef CONFIG_NET_FASTROUTE
|
#ifdef CONFIG_NET_FASTROUTE
|
/* Hack to detect packet socket */
|
/* Hack to detect packet socket */
|
if ((pt->data) && ((int)(pt->data)!=1)) {
|
if ((pt->data) && ((int)(pt->data)!=1)) {
|
netdev_fastroute_obstacles++;
|
netdev_fastroute_obstacles++;
|
dev_clear_fastroute(pt->dev);
|
dev_clear_fastroute(pt->dev);
|
}
|
}
|
#endif
|
#endif
|
if (pt->type == htons(ETH_P_ALL)) {
|
if (pt->type == htons(ETH_P_ALL)) {
|
netdev_nit++;
|
netdev_nit++;
|
pt->next=ptype_all;
|
pt->next=ptype_all;
|
ptype_all=pt;
|
ptype_all=pt;
|
} else {
|
} else {
|
hash=ntohs(pt->type)&15;
|
hash=ntohs(pt->type)&15;
|
pt->next = ptype_base[hash];
|
pt->next = ptype_base[hash];
|
ptype_base[hash] = pt;
|
ptype_base[hash] = pt;
|
}
|
}
|
br_write_unlock_bh(BR_NETPROTO_LOCK);
|
br_write_unlock_bh(BR_NETPROTO_LOCK);
|
}
|
}
|
|
|
|
|
/**
|
/**
|
* dev_remove_pack - remove packet handler
|
* dev_remove_pack - remove packet handler
|
* @pt: packet type declaration
|
* @pt: packet type declaration
|
*
|
*
|
* Remove a protocol handler that was previously added to the kernel
|
* Remove a protocol handler that was previously added to the kernel
|
* protocol handlers by dev_add_pack(). The passed &packet_type is removed
|
* protocol handlers by dev_add_pack(). The passed &packet_type is removed
|
* from the kernel lists and can be freed or reused once this function
|
* from the kernel lists and can be freed or reused once this function
|
* returns.
|
* returns.
|
*/
|
*/
|
|
|
void dev_remove_pack(struct packet_type *pt)
|
void dev_remove_pack(struct packet_type *pt)
|
{
|
{
|
struct packet_type **pt1;
|
struct packet_type **pt1;
|
|
|
br_write_lock_bh(BR_NETPROTO_LOCK);
|
br_write_lock_bh(BR_NETPROTO_LOCK);
|
|
|
if (pt->type == htons(ETH_P_ALL)) {
|
if (pt->type == htons(ETH_P_ALL)) {
|
netdev_nit--;
|
netdev_nit--;
|
pt1=&ptype_all;
|
pt1=&ptype_all;
|
} else {
|
} else {
|
pt1=&ptype_base[ntohs(pt->type)&15];
|
pt1=&ptype_base[ntohs(pt->type)&15];
|
}
|
}
|
|
|
for (; (*pt1) != NULL; pt1 = &((*pt1)->next)) {
|
for (; (*pt1) != NULL; pt1 = &((*pt1)->next)) {
|
if (pt == (*pt1)) {
|
if (pt == (*pt1)) {
|
*pt1 = pt->next;
|
*pt1 = pt->next;
|
#ifdef CONFIG_NET_FASTROUTE
|
#ifdef CONFIG_NET_FASTROUTE
|
if (pt->data)
|
if (pt->data)
|
netdev_fastroute_obstacles--;
|
netdev_fastroute_obstacles--;
|
#endif
|
#endif
|
br_write_unlock_bh(BR_NETPROTO_LOCK);
|
br_write_unlock_bh(BR_NETPROTO_LOCK);
|
return;
|
return;
|
}
|
}
|
}
|
}
|
br_write_unlock_bh(BR_NETPROTO_LOCK);
|
br_write_unlock_bh(BR_NETPROTO_LOCK);
|
printk(KERN_WARNING "dev_remove_pack: %p not found.\n", pt);
|
printk(KERN_WARNING "dev_remove_pack: %p not found.\n", pt);
|
}
|
}
|
|
|
/******************************************************************************
|
/******************************************************************************
|
|
|
Device Boot-time Settings Routines
|
Device Boot-time Settings Routines
|
|
|
*******************************************************************************/
|
*******************************************************************************/
|
|
|
/* Boot time configuration table */
|
/* Boot time configuration table */
|
static struct netdev_boot_setup dev_boot_setup[NETDEV_BOOT_SETUP_MAX];
|
static struct netdev_boot_setup dev_boot_setup[NETDEV_BOOT_SETUP_MAX];
|
|
|
/**
|
/**
|
* netdev_boot_setup_add - add new setup entry
|
* netdev_boot_setup_add - add new setup entry
|
* @name: name of the device
|
* @name: name of the device
|
* @map: configured settings for the device
|
* @map: configured settings for the device
|
*
|
*
|
* Adds new setup entry to the dev_boot_setup list. The function
|
* Adds new setup entry to the dev_boot_setup list. The function
|
* returns 0 on error and 1 on success. This is a generic routine to
|
* returns 0 on error and 1 on success. This is a generic routine to
|
* all netdevices.
|
* all netdevices.
|
*/
|
*/
|
int netdev_boot_setup_add(char *name, struct ifmap *map)
|
int netdev_boot_setup_add(char *name, struct ifmap *map)
|
{
|
{
|
struct netdev_boot_setup *s;
|
struct netdev_boot_setup *s;
|
int i;
|
int i;
|
|
|
s = dev_boot_setup;
|
s = dev_boot_setup;
|
for (i = 0; i < NETDEV_BOOT_SETUP_MAX; i++) {
|
for (i = 0; i < NETDEV_BOOT_SETUP_MAX; i++) {
|
if (s[i].name[0] == '\0' || s[i].name[0] == ' ') {
|
if (s[i].name[0] == '\0' || s[i].name[0] == ' ') {
|
memset(s[i].name, 0, sizeof(s[i].name));
|
memset(s[i].name, 0, sizeof(s[i].name));
|
strcpy(s[i].name, name);
|
strcpy(s[i].name, name);
|
memcpy(&s[i].map, map, sizeof(s[i].map));
|
memcpy(&s[i].map, map, sizeof(s[i].map));
|
break;
|
break;
|
}
|
}
|
}
|
}
|
|
|
if (i >= NETDEV_BOOT_SETUP_MAX)
|
if (i >= NETDEV_BOOT_SETUP_MAX)
|
return 0;
|
return 0;
|
|
|
return 1;
|
return 1;
|
}
|
}
|
|
|
/**
|
/**
|
* netdev_boot_setup_check - check boot time settings
|
* netdev_boot_setup_check - check boot time settings
|
* @dev: the netdevice
|
* @dev: the netdevice
|
*
|
*
|
* Check boot time settings for the device.
|
* Check boot time settings for the device.
|
* The found settings are set for the device to be used
|
* The found settings are set for the device to be used
|
* later in the device probing.
|
* later in the device probing.
|
* Returns 0 if no settings found, 1 if they are.
|
* Returns 0 if no settings found, 1 if they are.
|
*/
|
*/
|
int netdev_boot_setup_check(struct net_device *dev)
|
int netdev_boot_setup_check(struct net_device *dev)
|
{
|
{
|
struct netdev_boot_setup *s;
|
struct netdev_boot_setup *s;
|
int i;
|
int i;
|
|
|
s = dev_boot_setup;
|
s = dev_boot_setup;
|
for (i = 0; i < NETDEV_BOOT_SETUP_MAX; i++) {
|
for (i = 0; i < NETDEV_BOOT_SETUP_MAX; i++) {
|
if (s[i].name[0] != '\0' && s[i].name[0] != ' ' &&
|
if (s[i].name[0] != '\0' && s[i].name[0] != ' ' &&
|
!strncmp(dev->name, s[i].name, strlen(s[i].name))) {
|
!strncmp(dev->name, s[i].name, strlen(s[i].name))) {
|
dev->irq = s[i].map.irq;
|
dev->irq = s[i].map.irq;
|
dev->base_addr = s[i].map.base_addr;
|
dev->base_addr = s[i].map.base_addr;
|
dev->mem_start = s[i].map.mem_start;
|
dev->mem_start = s[i].map.mem_start;
|
dev->mem_end = s[i].map.mem_end;
|
dev->mem_end = s[i].map.mem_end;
|
return 1;
|
return 1;
|
}
|
}
|
}
|
}
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/*
|
/*
|
* Saves at boot time configured settings for any netdevice.
|
* Saves at boot time configured settings for any netdevice.
|
*/
|
*/
|
int __init netdev_boot_setup(char *str)
|
int __init netdev_boot_setup(char *str)
|
{
|
{
|
int ints[5];
|
int ints[5];
|
struct ifmap map;
|
struct ifmap map;
|
|
|
str = get_options(str, ARRAY_SIZE(ints), ints);
|
str = get_options(str, ARRAY_SIZE(ints), ints);
|
if (!str || !*str)
|
if (!str || !*str)
|
return 0;
|
return 0;
|
|
|
/* Save settings */
|
/* Save settings */
|
memset(&map, 0, sizeof(map));
|
memset(&map, 0, sizeof(map));
|
if (ints[0] > 0)
|
if (ints[0] > 0)
|
map.irq = ints[1];
|
map.irq = ints[1];
|
if (ints[0] > 1)
|
if (ints[0] > 1)
|
map.base_addr = ints[2];
|
map.base_addr = ints[2];
|
if (ints[0] > 2)
|
if (ints[0] > 2)
|
map.mem_start = ints[3];
|
map.mem_start = ints[3];
|
if (ints[0] > 3)
|
if (ints[0] > 3)
|
map.mem_end = ints[4];
|
map.mem_end = ints[4];
|
|
|
/* Add new entry to the list */
|
/* Add new entry to the list */
|
return netdev_boot_setup_add(str, &map);
|
return netdev_boot_setup_add(str, &map);
|
}
|
}
|
|
|
__setup("netdev=", netdev_boot_setup);
|
__setup("netdev=", netdev_boot_setup);
|
|
|
/*****************************************************************************************
|
/*****************************************************************************************
|
|
|
Device Interface Subroutines
|
Device Interface Subroutines
|
|
|
******************************************************************************************/
|
******************************************************************************************/
|
|
|
/**
|
/**
|
* __dev_get_by_name - find a device by its name
|
* __dev_get_by_name - find a device by its name
|
* @name: name to find
|
* @name: name to find
|
*
|
*
|
* Find an interface by name. Must be called under RTNL semaphore
|
* Find an interface by name. Must be called under RTNL semaphore
|
* or @dev_base_lock. If the name is found a pointer to the device
|
* or @dev_base_lock. If the name is found a pointer to the device
|
* is returned. If the name is not found then %NULL is returned. The
|
* is returned. If the name is not found then %NULL is returned. The
|
* reference counters are not incremented so the caller must be
|
* reference counters are not incremented so the caller must be
|
* careful with locks.
|
* careful with locks.
|
*/
|
*/
|
|
|
|
|
struct net_device *__dev_get_by_name(const char *name)
|
struct net_device *__dev_get_by_name(const char *name)
|
{
|
{
|
struct net_device *dev;
|
struct net_device *dev;
|
|
|
for (dev = dev_base; dev != NULL; dev = dev->next) {
|
for (dev = dev_base; dev != NULL; dev = dev->next) {
|
if (strncmp(dev->name, name, IFNAMSIZ) == 0)
|
if (strncmp(dev->name, name, IFNAMSIZ) == 0)
|
return dev;
|
return dev;
|
}
|
}
|
return NULL;
|
return NULL;
|
}
|
}
|
|
|
/**
|
/**
|
* dev_get_by_name - find a device by its name
|
* dev_get_by_name - find a device by its name
|
* @name: name to find
|
* @name: name to find
|
*
|
*
|
* Find an interface by name. This can be called from any
|
* Find an interface by name. This can be called from any
|
* context and does its own locking. The returned handle has
|
* context and does its own locking. The returned handle has
|
* the usage count incremented and the caller must use dev_put() to
|
* the usage count incremented and the caller must use dev_put() to
|
* release it when it is no longer needed. %NULL is returned if no
|
* release it when it is no longer needed. %NULL is returned if no
|
* matching device is found.
|
* matching device is found.
|
*/
|
*/
|
|
|
struct net_device *dev_get_by_name(const char *name)
|
struct net_device *dev_get_by_name(const char *name)
|
{
|
{
|
struct net_device *dev;
|
struct net_device *dev;
|
|
|
read_lock(&dev_base_lock);
|
read_lock(&dev_base_lock);
|
dev = __dev_get_by_name(name);
|
dev = __dev_get_by_name(name);
|
if (dev)
|
if (dev)
|
dev_hold(dev);
|
dev_hold(dev);
|
read_unlock(&dev_base_lock);
|
read_unlock(&dev_base_lock);
|
return dev;
|
return dev;
|
}
|
}
|
|
|
/*
|
/*
|
Return value is changed to int to prevent illegal usage in future.
|
Return value is changed to int to prevent illegal usage in future.
|
It is still legal to use to check for device existence.
|
It is still legal to use to check for device existence.
|
|
|
User should understand, that the result returned by this function
|
User should understand, that the result returned by this function
|
is meaningless, if it was not issued under rtnl semaphore.
|
is meaningless, if it was not issued under rtnl semaphore.
|
*/
|
*/
|
|
|
/**
|
/**
|
* dev_get - test if a device exists
|
* dev_get - test if a device exists
|
* @name: name to test for
|
* @name: name to test for
|
*
|
*
|
* Test if a name exists. Returns true if the name is found. In order
|
* Test if a name exists. Returns true if the name is found. In order
|
* to be sure the name is not allocated or removed during the test the
|
* to be sure the name is not allocated or removed during the test the
|
* caller must hold the rtnl semaphore.
|
* caller must hold the rtnl semaphore.
|
*
|
*
|
* This function primarily exists for back compatibility with older
|
* This function primarily exists for back compatibility with older
|
* drivers.
|
* drivers.
|
*/
|
*/
|
|
|
int dev_get(const char *name)
|
int dev_get(const char *name)
|
{
|
{
|
struct net_device *dev;
|
struct net_device *dev;
|
|
|
read_lock(&dev_base_lock);
|
read_lock(&dev_base_lock);
|
dev = __dev_get_by_name(name);
|
dev = __dev_get_by_name(name);
|
read_unlock(&dev_base_lock);
|
read_unlock(&dev_base_lock);
|
return dev != NULL;
|
return dev != NULL;
|
}
|
}
|
|
|
/**
|
/**
|
* __dev_get_by_index - find a device by its ifindex
|
* __dev_get_by_index - find a device by its ifindex
|
* @ifindex: index of device
|
* @ifindex: index of device
|
*
|
*
|
* Search for an interface by index. Returns %NULL if the device
|
* Search for an interface by index. Returns %NULL if the device
|
* is not found or a pointer to the device. The device has not
|
* is not found or a pointer to the device. The device has not
|
* had its reference counter increased so the caller must be careful
|
* had its reference counter increased so the caller must be careful
|
* about locking. The caller must hold either the RTNL semaphore
|
* about locking. The caller must hold either the RTNL semaphore
|
* or @dev_base_lock.
|
* or @dev_base_lock.
|
*/
|
*/
|
|
|
struct net_device * __dev_get_by_index(int ifindex)
|
struct net_device * __dev_get_by_index(int ifindex)
|
{
|
{
|
struct net_device *dev;
|
struct net_device *dev;
|
|
|
for (dev = dev_base; dev != NULL; dev = dev->next) {
|
for (dev = dev_base; dev != NULL; dev = dev->next) {
|
if (dev->ifindex == ifindex)
|
if (dev->ifindex == ifindex)
|
return dev;
|
return dev;
|
}
|
}
|
return NULL;
|
return NULL;
|
}
|
}
|
|
|
|
|
/**
|
/**
|
* dev_get_by_index - find a device by its ifindex
|
* dev_get_by_index - find a device by its ifindex
|
* @ifindex: index of device
|
* @ifindex: index of device
|
*
|
*
|
* Search for an interface by index. Returns NULL if the device
|
* Search for an interface by index. Returns NULL if the device
|
* is not found or a pointer to the device. The device returned has
|
* is not found or a pointer to the device. The device returned has
|
* had a reference added and the pointer is safe until the user calls
|
* had a reference added and the pointer is safe until the user calls
|
* dev_put to indicate they have finished with it.
|
* dev_put to indicate they have finished with it.
|
*/
|
*/
|
|
|
struct net_device * dev_get_by_index(int ifindex)
|
struct net_device * dev_get_by_index(int ifindex)
|
{
|
{
|
struct net_device *dev;
|
struct net_device *dev;
|
|
|
read_lock(&dev_base_lock);
|
read_lock(&dev_base_lock);
|
dev = __dev_get_by_index(ifindex);
|
dev = __dev_get_by_index(ifindex);
|
if (dev)
|
if (dev)
|
dev_hold(dev);
|
dev_hold(dev);
|
read_unlock(&dev_base_lock);
|
read_unlock(&dev_base_lock);
|
return dev;
|
return dev;
|
}
|
}
|
|
|
/**
|
/**
|
* dev_getbyhwaddr - find a device by its hardware address
|
* dev_getbyhwaddr - find a device by its hardware address
|
* @type: media type of device
|
* @type: media type of device
|
* @ha: hardware address
|
* @ha: hardware address
|
*
|
*
|
* Search for an interface by MAC address. Returns NULL if the device
|
* Search for an interface by MAC address. Returns NULL if the device
|
* is not found or a pointer to the device. The caller must hold the
|
* is not found or a pointer to the device. The caller must hold the
|
* rtnl semaphore. The returned device has not had its ref count increased
|
* rtnl semaphore. The returned device has not had its ref count increased
|
* and the caller must therefore be careful about locking
|
* and the caller must therefore be careful about locking
|
*
|
*
|
* BUGS:
|
* BUGS:
|
* If the API was consistent this would be __dev_get_by_hwaddr
|
* If the API was consistent this would be __dev_get_by_hwaddr
|
*/
|
*/
|
|
|
struct net_device *dev_getbyhwaddr(unsigned short type, char *ha)
|
struct net_device *dev_getbyhwaddr(unsigned short type, char *ha)
|
{
|
{
|
struct net_device *dev;
|
struct net_device *dev;
|
|
|
ASSERT_RTNL();
|
ASSERT_RTNL();
|
|
|
for (dev = dev_base; dev != NULL; dev = dev->next) {
|
for (dev = dev_base; dev != NULL; dev = dev->next) {
|
if (dev->type == type &&
|
if (dev->type == type &&
|
memcmp(dev->dev_addr, ha, dev->addr_len) == 0)
|
memcmp(dev->dev_addr, ha, dev->addr_len) == 0)
|
return dev;
|
return dev;
|
}
|
}
|
return NULL;
|
return NULL;
|
}
|
}
|
|
|
/**
|
/**
|
* dev_get_by_flags - find any device with given flags
|
* dev_get_by_flags - find any device with given flags
|
* @if_flags: IFF_* values
|
* @if_flags: IFF_* values
|
* @mask: bitmask of bits in if_flags to check
|
* @mask: bitmask of bits in if_flags to check
|
*
|
*
|
* Search for any interface with the given flags. Returns NULL if a device
|
* Search for any interface with the given flags. Returns NULL if a device
|
* is not found or a pointer to the device. The device returned has
|
* is not found or a pointer to the device. The device returned has
|
* had a reference added and the pointer is safe until the user calls
|
* had a reference added and the pointer is safe until the user calls
|
* dev_put to indicate they have finished with it.
|
* dev_put to indicate they have finished with it.
|
*/
|
*/
|
|
|
struct net_device * dev_get_by_flags(unsigned short if_flags, unsigned short mask)
|
struct net_device * dev_get_by_flags(unsigned short if_flags, unsigned short mask)
|
{
|
{
|
struct net_device *dev;
|
struct net_device *dev;
|
|
|
read_lock(&dev_base_lock);
|
read_lock(&dev_base_lock);
|
dev = __dev_get_by_flags(if_flags, mask);
|
dev = __dev_get_by_flags(if_flags, mask);
|
if (dev)
|
if (dev)
|
dev_hold(dev);
|
dev_hold(dev);
|
read_unlock(&dev_base_lock);
|
read_unlock(&dev_base_lock);
|
return dev;
|
return dev;
|
}
|
}
|
|
|
/**
|
/**
|
* __dev_get_by_flags - find any device with given flags
|
* __dev_get_by_flags - find any device with given flags
|
* @if_flags: IFF_* values
|
* @if_flags: IFF_* values
|
* @mask: bitmask of bits in if_flags to check
|
* @mask: bitmask of bits in if_flags to check
|
*
|
*
|
* Search for any interface with the given flags. Returns NULL if a device
|
* Search for any interface with the given flags. Returns NULL if a device
|
* is not found or a pointer to the device. The caller must hold either
|
* is not found or a pointer to the device. The caller must hold either
|
* the RTNL semaphore or @dev_base_lock.
|
* the RTNL semaphore or @dev_base_lock.
|
*/
|
*/
|
|
|
struct net_device *__dev_get_by_flags(unsigned short if_flags, unsigned short mask)
|
struct net_device *__dev_get_by_flags(unsigned short if_flags, unsigned short mask)
|
{
|
{
|
struct net_device *dev;
|
struct net_device *dev;
|
|
|
for (dev = dev_base; dev != NULL; dev = dev->next) {
|
for (dev = dev_base; dev != NULL; dev = dev->next) {
|
if (((dev->flags ^ if_flags) & mask) == 0)
|
if (((dev->flags ^ if_flags) & mask) == 0)
|
return dev;
|
return dev;
|
}
|
}
|
return NULL;
|
return NULL;
|
}
|
}
|
|
|
/**
|
/**
|
* dev_alloc_name - allocate a name for a device
|
* dev_alloc_name - allocate a name for a device
|
* @dev: device
|
* @dev: device
|
* @name: name format string
|
* @name: name format string
|
*
|
*
|
* Passed a format string - eg "lt%d" it will try and find a suitable
|
* Passed a format string - eg "lt%d" it will try and find a suitable
|
* id. Not efficient for many devices, not called a lot. The caller
|
* id. Not efficient for many devices, not called a lot. The caller
|
* must hold the dev_base or rtnl lock while allocating the name and
|
* must hold the dev_base or rtnl lock while allocating the name and
|
* adding the device in order to avoid duplicates. Returns the number
|
* adding the device in order to avoid duplicates. Returns the number
|
* of the unit assigned or a negative errno code.
|
* of the unit assigned or a negative errno code.
|
*/
|
*/
|
|
|
int dev_alloc_name(struct net_device *dev, const char *name)
|
int dev_alloc_name(struct net_device *dev, const char *name)
|
{
|
{
|
int i;
|
int i;
|
char buf[32];
|
char buf[32];
|
char *p;
|
char *p;
|
|
|
/*
|
/*
|
* Verify the string as this thing may have come from
|
* Verify the string as this thing may have come from
|
* the user. There must be either one "%d" and no other "%"
|
* the user. There must be either one "%d" and no other "%"
|
* characters, or no "%" characters at all.
|
* characters, or no "%" characters at all.
|
*/
|
*/
|
p = strchr(name, '%');
|
p = strchr(name, '%');
|
if (p && (p[1] != 'd' || strchr(p+2, '%')))
|
if (p && (p[1] != 'd' || strchr(p+2, '%')))
|
return -EINVAL;
|
return -EINVAL;
|
|
|
/*
|
/*
|
* If you need over 100 please also fix the algorithm...
|
* If you need over 100 please also fix the algorithm...
|
*/
|
*/
|
for (i = 0; i < 100; i++) {
|
for (i = 0; i < 100; i++) {
|
snprintf(buf,sizeof(buf),name,i);
|
snprintf(buf,sizeof(buf),name,i);
|
if (__dev_get_by_name(buf) == NULL) {
|
if (__dev_get_by_name(buf) == NULL) {
|
strcpy(dev->name, buf);
|
strcpy(dev->name, buf);
|
return i;
|
return i;
|
}
|
}
|
}
|
}
|
return -ENFILE; /* Over 100 of the things .. bail out! */
|
return -ENFILE; /* Over 100 of the things .. bail out! */
|
}
|
}
|
|
|
/**
|
/**
|
* dev_alloc - allocate a network device and name
|
* dev_alloc - allocate a network device and name
|
* @name: name format string
|
* @name: name format string
|
* @err: error return pointer
|
* @err: error return pointer
|
*
|
*
|
* Passed a format string, eg. "lt%d", it will allocate a network device
|
* Passed a format string, eg. "lt%d", it will allocate a network device
|
* and space for the name. %NULL is returned if no memory is available.
|
* and space for the name. %NULL is returned if no memory is available.
|
* If the allocation succeeds then the name is assigned and the
|
* If the allocation succeeds then the name is assigned and the
|
* device pointer returned. %NULL is returned if the name allocation
|
* device pointer returned. %NULL is returned if the name allocation
|
* failed. The cause of an error is returned as a negative errno code
|
* failed. The cause of an error is returned as a negative errno code
|
* in the variable @err points to.
|
* in the variable @err points to.
|
*
|
*
|
* The caller must hold the @dev_base or RTNL locks when doing this in
|
* The caller must hold the @dev_base or RTNL locks when doing this in
|
* order to avoid duplicate name allocations.
|
* order to avoid duplicate name allocations.
|
*/
|
*/
|
|
|
struct net_device *dev_alloc(const char *name, int *err)
|
struct net_device *dev_alloc(const char *name, int *err)
|
{
|
{
|
struct net_device *dev=kmalloc(sizeof(struct net_device), GFP_KERNEL);
|
struct net_device *dev=kmalloc(sizeof(struct net_device), GFP_KERNEL);
|
if (dev == NULL) {
|
if (dev == NULL) {
|
*err = -ENOBUFS;
|
*err = -ENOBUFS;
|
return NULL;
|
return NULL;
|
}
|
}
|
memset(dev, 0, sizeof(struct net_device));
|
memset(dev, 0, sizeof(struct net_device));
|
*err = dev_alloc_name(dev, name);
|
*err = dev_alloc_name(dev, name);
|
if (*err < 0) {
|
if (*err < 0) {
|
kfree(dev);
|
kfree(dev);
|
return NULL;
|
return NULL;
|
}
|
}
|
return dev;
|
return dev;
|
}
|
}
|
|
|
/**
|
/**
|
* netdev_state_change - device changes state
|
* netdev_state_change - device changes state
|
* @dev: device to cause notification
|
* @dev: device to cause notification
|
*
|
*
|
* Called to indicate a device has changed state. This function calls
|
* Called to indicate a device has changed state. This function calls
|
* the notifier chains for netdev_chain and sends a NEWLINK message
|
* the notifier chains for netdev_chain and sends a NEWLINK message
|
* to the routing socket.
|
* to the routing socket.
|
*/
|
*/
|
|
|
void netdev_state_change(struct net_device *dev)
|
void netdev_state_change(struct net_device *dev)
|
{
|
{
|
if (dev->flags&IFF_UP) {
|
if (dev->flags&IFF_UP) {
|
notifier_call_chain(&netdev_chain, NETDEV_CHANGE, dev);
|
notifier_call_chain(&netdev_chain, NETDEV_CHANGE, dev);
|
rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
|
rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
|
}
|
}
|
}
|
}
|
|
|
|
|
#ifdef CONFIG_KMOD
|
#ifdef CONFIG_KMOD
|
|
|
/**
|
/**
|
* dev_load - load a network module
|
* dev_load - load a network module
|
* @name: name of interface
|
* @name: name of interface
|
*
|
*
|
* If a network interface is not present and the process has suitable
|
* If a network interface is not present and the process has suitable
|
* privileges this function loads the module. If module loading is not
|
* privileges this function loads the module. If module loading is not
|
* available in this kernel then it becomes a nop.
|
* available in this kernel then it becomes a nop.
|
*/
|
*/
|
|
|
void dev_load(const char *name)
|
void dev_load(const char *name)
|
{
|
{
|
if (!dev_get(name) && capable(CAP_SYS_MODULE))
|
if (!dev_get(name) && capable(CAP_SYS_MODULE))
|
request_module(name);
|
request_module(name);
|
}
|
}
|
|
|
#else
|
#else
|
|
|
extern inline void dev_load(const char *unused){;}
|
extern inline void dev_load(const char *unused){;}
|
|
|
#endif
|
#endif
|
|
|
static int default_rebuild_header(struct sk_buff *skb)
|
static int default_rebuild_header(struct sk_buff *skb)
|
{
|
{
|
printk(KERN_DEBUG "%s: default_rebuild_header called -- BUG!\n", skb->dev ? skb->dev->name : "NULL!!!");
|
printk(KERN_DEBUG "%s: default_rebuild_header called -- BUG!\n", skb->dev ? skb->dev->name : "NULL!!!");
|
kfree_skb(skb);
|
kfree_skb(skb);
|
return 1;
|
return 1;
|
}
|
}
|
|
|
/**
|
/**
|
* dev_open - prepare an interface for use.
|
* dev_open - prepare an interface for use.
|
* @dev: device to open
|
* @dev: device to open
|
*
|
*
|
* Takes a device from down to up state. The device's private open
|
* Takes a device from down to up state. The device's private open
|
* function is invoked and then the multicast lists are loaded. Finally
|
* function is invoked and then the multicast lists are loaded. Finally
|
* the device is moved into the up state and a %NETDEV_UP message is
|
* the device is moved into the up state and a %NETDEV_UP message is
|
* sent to the netdev notifier chain.
|
* sent to the netdev notifier chain.
|
*
|
*
|
* Calling this function on an active interface is a nop. On a failure
|
* Calling this function on an active interface is a nop. On a failure
|
* a negative errno code is returned.
|
* a negative errno code is returned.
|
*/
|
*/
|
|
|
int dev_open(struct net_device *dev)
|
int dev_open(struct net_device *dev)
|
{
|
{
|
int ret = 0;
|
int ret = 0;
|
|
|
/*
|
/*
|
* Is it already up?
|
* Is it already up?
|
*/
|
*/
|
|
|
if (dev->flags&IFF_UP)
|
if (dev->flags&IFF_UP)
|
return 0;
|
return 0;
|
|
|
/*
|
/*
|
* Is it even present?
|
* Is it even present?
|
*/
|
*/
|
if (!netif_device_present(dev))
|
if (!netif_device_present(dev))
|
return -ENODEV;
|
return -ENODEV;
|
|
|
/*
|
/*
|
* Call device private open method
|
* Call device private open method
|
*/
|
*/
|
if (try_inc_mod_count(dev->owner)) {
|
if (try_inc_mod_count(dev->owner)) {
|
set_bit(__LINK_STATE_START, &dev->state);
|
set_bit(__LINK_STATE_START, &dev->state);
|
if (dev->open) {
|
if (dev->open) {
|
ret = dev->open(dev);
|
ret = dev->open(dev);
|
if (ret != 0) {
|
if (ret != 0) {
|
clear_bit(__LINK_STATE_START, &dev->state);
|
clear_bit(__LINK_STATE_START, &dev->state);
|
if (dev->owner)
|
if (dev->owner)
|
__MOD_DEC_USE_COUNT(dev->owner);
|
__MOD_DEC_USE_COUNT(dev->owner);
|
}
|
}
|
}
|
}
|
} else {
|
} else {
|
ret = -ENODEV;
|
ret = -ENODEV;
|
}
|
}
|
|
|
/*
|
/*
|
* If it went open OK then:
|
* If it went open OK then:
|
*/
|
*/
|
|
|
if (ret == 0)
|
if (ret == 0)
|
{
|
{
|
/*
|
/*
|
* Set the flags.
|
* Set the flags.
|
*/
|
*/
|
dev->flags |= IFF_UP;
|
dev->flags |= IFF_UP;
|
|
|
/*
|
/*
|
* Initialize multicasting status
|
* Initialize multicasting status
|
*/
|
*/
|
dev_mc_upload(dev);
|
dev_mc_upload(dev);
|
|
|
/*
|
/*
|
* Wakeup transmit queue engine
|
* Wakeup transmit queue engine
|
*/
|
*/
|
dev_activate(dev);
|
dev_activate(dev);
|
|
|
/*
|
/*
|
* ... and announce new interface.
|
* ... and announce new interface.
|
*/
|
*/
|
notifier_call_chain(&netdev_chain, NETDEV_UP, dev);
|
notifier_call_chain(&netdev_chain, NETDEV_UP, dev);
|
}
|
}
|
return(ret);
|
return(ret);
|
}
|
}
|
|
|
#ifdef CONFIG_NET_FASTROUTE
|
#ifdef CONFIG_NET_FASTROUTE
|
|
|
static void dev_do_clear_fastroute(struct net_device *dev)
|
static void dev_do_clear_fastroute(struct net_device *dev)
|
{
|
{
|
if (dev->accept_fastpath) {
|
if (dev->accept_fastpath) {
|
int i;
|
int i;
|
|
|
for (i=0; i<=NETDEV_FASTROUTE_HMASK; i++) {
|
for (i=0; i<=NETDEV_FASTROUTE_HMASK; i++) {
|
struct dst_entry *dst;
|
struct dst_entry *dst;
|
|
|
write_lock_irq(&dev->fastpath_lock);
|
write_lock_irq(&dev->fastpath_lock);
|
dst = dev->fastpath[i];
|
dst = dev->fastpath[i];
|
dev->fastpath[i] = NULL;
|
dev->fastpath[i] = NULL;
|
write_unlock_irq(&dev->fastpath_lock);
|
write_unlock_irq(&dev->fastpath_lock);
|
|
|
dst_release(dst);
|
dst_release(dst);
|
}
|
}
|
}
|
}
|
}
|
}
|
|
|
void dev_clear_fastroute(struct net_device *dev)
|
void dev_clear_fastroute(struct net_device *dev)
|
{
|
{
|
if (dev) {
|
if (dev) {
|
dev_do_clear_fastroute(dev);
|
dev_do_clear_fastroute(dev);
|
} else {
|
} else {
|
read_lock(&dev_base_lock);
|
read_lock(&dev_base_lock);
|
for (dev = dev_base; dev; dev = dev->next)
|
for (dev = dev_base; dev; dev = dev->next)
|
dev_do_clear_fastroute(dev);
|
dev_do_clear_fastroute(dev);
|
read_unlock(&dev_base_lock);
|
read_unlock(&dev_base_lock);
|
}
|
}
|
}
|
}
|
#endif
|
#endif
|
|
|
/**
|
/**
|
* dev_close - shutdown an interface.
|
* dev_close - shutdown an interface.
|
* @dev: device to shutdown
|
* @dev: device to shutdown
|
*
|
*
|
* This function moves an active device into down state. A
|
* This function moves an active device into down state. A
|
* %NETDEV_GOING_DOWN is sent to the netdev notifier chain. The device
|
* %NETDEV_GOING_DOWN is sent to the netdev notifier chain. The device
|
* is then deactivated and finally a %NETDEV_DOWN is sent to the notifier
|
* is then deactivated and finally a %NETDEV_DOWN is sent to the notifier
|
* chain.
|
* chain.
|
*/
|
*/
|
|
|
int dev_close(struct net_device *dev)
|
int dev_close(struct net_device *dev)
|
{
|
{
|
if (!(dev->flags&IFF_UP))
|
if (!(dev->flags&IFF_UP))
|
return 0;
|
return 0;
|
|
|
/*
|
/*
|
* Tell people we are going down, so that they can
|
* Tell people we are going down, so that they can
|
* prepare to death, when device is still operating.
|
* prepare to death, when device is still operating.
|
*/
|
*/
|
notifier_call_chain(&netdev_chain, NETDEV_GOING_DOWN, dev);
|
notifier_call_chain(&netdev_chain, NETDEV_GOING_DOWN, dev);
|
|
|
dev_deactivate(dev);
|
dev_deactivate(dev);
|
|
|
clear_bit(__LINK_STATE_START, &dev->state);
|
clear_bit(__LINK_STATE_START, &dev->state);
|
|
|
/* Synchronize to scheduled poll. We cannot touch poll list,
|
/* Synchronize to scheduled poll. We cannot touch poll list,
|
* it can be even on different cpu. So just clear netif_running(),
|
* it can be even on different cpu. So just clear netif_running(),
|
* and wait when poll really will happen. Actually, the best place
|
* and wait when poll really will happen. Actually, the best place
|
* for this is inside dev->stop() after device stopped its irq
|
* for this is inside dev->stop() after device stopped its irq
|
* engine, but this requires more changes in devices. */
|
* engine, but this requires more changes in devices. */
|
|
|
smp_mb__after_clear_bit(); /* Commit netif_running(). */
|
smp_mb__after_clear_bit(); /* Commit netif_running(). */
|
while (test_bit(__LINK_STATE_RX_SCHED, &dev->state)) {
|
while (test_bit(__LINK_STATE_RX_SCHED, &dev->state)) {
|
/* No hurry. */
|
/* No hurry. */
|
current->state = TASK_INTERRUPTIBLE;
|
current->state = TASK_INTERRUPTIBLE;
|
schedule_timeout(1);
|
schedule_timeout(1);
|
}
|
}
|
|
|
/*
|
/*
|
* Call the device specific close. This cannot fail.
|
* Call the device specific close. This cannot fail.
|
* Only if device is UP
|
* Only if device is UP
|
*
|
*
|
* We allow it to be called even after a DETACH hot-plug
|
* We allow it to be called even after a DETACH hot-plug
|
* event.
|
* event.
|
*/
|
*/
|
|
|
if (dev->stop)
|
if (dev->stop)
|
dev->stop(dev);
|
dev->stop(dev);
|
|
|
/*
|
/*
|
* Device is now down.
|
* Device is now down.
|
*/
|
*/
|
|
|
dev->flags &= ~IFF_UP;
|
dev->flags &= ~IFF_UP;
|
#ifdef CONFIG_NET_FASTROUTE
|
#ifdef CONFIG_NET_FASTROUTE
|
dev_clear_fastroute(dev);
|
dev_clear_fastroute(dev);
|
#endif
|
#endif
|
|
|
/*
|
/*
|
* Tell people we are down
|
* Tell people we are down
|
*/
|
*/
|
notifier_call_chain(&netdev_chain, NETDEV_DOWN, dev);
|
notifier_call_chain(&netdev_chain, NETDEV_DOWN, dev);
|
|
|
/*
|
/*
|
* Drop the module refcount
|
* Drop the module refcount
|
*/
|
*/
|
if (dev->owner)
|
if (dev->owner)
|
__MOD_DEC_USE_COUNT(dev->owner);
|
__MOD_DEC_USE_COUNT(dev->owner);
|
|
|
return(0);
|
return(0);
|
}
|
}
|
|
|
|
|
/*
|
/*
|
* Device change register/unregister. These are not inline or static
|
* Device change register/unregister. These are not inline or static
|
* as we export them to the world.
|
* as we export them to the world.
|
*/
|
*/
|
|
|
/**
|
/**
|
* register_netdevice_notifier - register a network notifier block
|
* register_netdevice_notifier - register a network notifier block
|
* @nb: notifier
|
* @nb: notifier
|
*
|
*
|
* Register a notifier to be called when network device events occur.
|
* Register a notifier to be called when network device events occur.
|
* The notifier passed is linked into the kernel structures and must
|
* The notifier passed is linked into the kernel structures and must
|
* not be reused until it has been unregistered. A negative errno code
|
* not be reused until it has been unregistered. A negative errno code
|
* is returned on a failure.
|
* is returned on a failure.
|
*/
|
*/
|
|
|
int register_netdevice_notifier(struct notifier_block *nb)
|
int register_netdevice_notifier(struct notifier_block *nb)
|
{
|
{
|
return notifier_chain_register(&netdev_chain, nb);
|
return notifier_chain_register(&netdev_chain, nb);
|
}
|
}
|
|
|
/**
|
/**
|
* unregister_netdevice_notifier - unregister a network notifier block
|
* unregister_netdevice_notifier - unregister a network notifier block
|
* @nb: notifier
|
* @nb: notifier
|
*
|
*
|
* Unregister a notifier previously registered by
|
* Unregister a notifier previously registered by
|
* register_netdevice_notifier(). The notifier is unlinked into the
|
* register_netdevice_notifier(). The notifier is unlinked into the
|
* kernel structures and may then be reused. A negative errno code
|
* kernel structures and may then be reused. A negative errno code
|
* is returned on a failure.
|
* is returned on a failure.
|
*/
|
*/
|
|
|
int unregister_netdevice_notifier(struct notifier_block *nb)
|
int unregister_netdevice_notifier(struct notifier_block *nb)
|
{
|
{
|
return notifier_chain_unregister(&netdev_chain,nb);
|
return notifier_chain_unregister(&netdev_chain,nb);
|
}
|
}
|
|
|
/*
|
/*
|
* Support routine. Sends outgoing frames to any network
|
* Support routine. Sends outgoing frames to any network
|
* taps currently in use.
|
* taps currently in use.
|
*/
|
*/
|
|
|
void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev)
|
void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev)
|
{
|
{
|
struct packet_type *ptype;
|
struct packet_type *ptype;
|
do_gettimeofday(&skb->stamp);
|
do_gettimeofday(&skb->stamp);
|
|
|
br_read_lock(BR_NETPROTO_LOCK);
|
br_read_lock(BR_NETPROTO_LOCK);
|
for (ptype = ptype_all; ptype!=NULL; ptype = ptype->next)
|
for (ptype = ptype_all; ptype!=NULL; ptype = ptype->next)
|
{
|
{
|
/* Never send packets back to the socket
|
/* Never send packets back to the socket
|
* they originated from - MvS (miquels@drinkel.ow.org)
|
* they originated from - MvS (miquels@drinkel.ow.org)
|
*/
|
*/
|
if ((ptype->dev == dev || !ptype->dev) &&
|
if ((ptype->dev == dev || !ptype->dev) &&
|
((struct sock *)ptype->data != skb->sk))
|
((struct sock *)ptype->data != skb->sk))
|
{
|
{
|
struct sk_buff *skb2;
|
struct sk_buff *skb2;
|
if ((skb2 = skb_clone(skb, GFP_ATOMIC)) == NULL)
|
if ((skb2 = skb_clone(skb, GFP_ATOMIC)) == NULL)
|
break;
|
break;
|
|
|
/* skb->nh should be correctly
|
/* skb->nh should be correctly
|
set by sender, so that the second statement is
|
set by sender, so that the second statement is
|
just protection against buggy protocols.
|
just protection against buggy protocols.
|
*/
|
*/
|
skb2->mac.raw = skb2->data;
|
skb2->mac.raw = skb2->data;
|
|
|
if (skb2->nh.raw < skb2->data || skb2->nh.raw > skb2->tail) {
|
if (skb2->nh.raw < skb2->data || skb2->nh.raw > skb2->tail) {
|
if (net_ratelimit())
|
if (net_ratelimit())
|
printk(KERN_CRIT "protocol %04x is buggy, dev %s\n", skb2->protocol, dev->name);
|
printk(KERN_CRIT "protocol %04x is buggy, dev %s\n", skb2->protocol, dev->name);
|
skb2->nh.raw = skb2->data;
|
skb2->nh.raw = skb2->data;
|
}
|
}
|
|
|
skb2->h.raw = skb2->nh.raw;
|
skb2->h.raw = skb2->nh.raw;
|
skb2->pkt_type = PACKET_OUTGOING;
|
skb2->pkt_type = PACKET_OUTGOING;
|
ptype->func(skb2, skb->dev, ptype);
|
ptype->func(skb2, skb->dev, ptype);
|
}
|
}
|
}
|
}
|
br_read_unlock(BR_NETPROTO_LOCK);
|
br_read_unlock(BR_NETPROTO_LOCK);
|
}
|
}
|
|
|
/* Calculate csum in the case, when packet is misrouted.
|
/* Calculate csum in the case, when packet is misrouted.
|
* If it failed by some reason, ignore and send skb with wrong
|
* If it failed by some reason, ignore and send skb with wrong
|
* checksum.
|
* checksum.
|
*/
|
*/
|
struct sk_buff * skb_checksum_help(struct sk_buff *skb)
|
struct sk_buff * skb_checksum_help(struct sk_buff *skb)
|
{
|
{
|
int offset;
|
int offset;
|
unsigned int csum;
|
unsigned int csum;
|
|
|
offset = skb->h.raw - skb->data;
|
offset = skb->h.raw - skb->data;
|
if (offset > (int)skb->len)
|
if (offset > (int)skb->len)
|
BUG();
|
BUG();
|
csum = skb_checksum(skb, offset, skb->len-offset, 0);
|
csum = skb_checksum(skb, offset, skb->len-offset, 0);
|
|
|
offset = skb->tail - skb->h.raw;
|
offset = skb->tail - skb->h.raw;
|
if (offset <= 0)
|
if (offset <= 0)
|
BUG();
|
BUG();
|
if (skb->csum+2 > offset)
|
if (skb->csum+2 > offset)
|
BUG();
|
BUG();
|
|
|
*(u16*)(skb->h.raw + skb->csum) = csum_fold(csum);
|
*(u16*)(skb->h.raw + skb->csum) = csum_fold(csum);
|
skb->ip_summed = CHECKSUM_NONE;
|
skb->ip_summed = CHECKSUM_NONE;
|
return skb;
|
return skb;
|
}
|
}
|
|
|
#ifdef CONFIG_HIGHMEM
|
#ifdef CONFIG_HIGHMEM
|
/* Actually, we should eliminate this check as soon as we know, that:
|
/* Actually, we should eliminate this check as soon as we know, that:
|
* 1. IOMMU is present and allows to map all the memory.
|
* 1. IOMMU is present and allows to map all the memory.
|
* 2. No high memory really exists on this machine.
|
* 2. No high memory really exists on this machine.
|
*/
|
*/
|
|
|
static inline int
|
static inline int
|
illegal_highdma(struct net_device *dev, struct sk_buff *skb)
|
illegal_highdma(struct net_device *dev, struct sk_buff *skb)
|
{
|
{
|
int i;
|
int i;
|
|
|
if (dev->features&NETIF_F_HIGHDMA)
|
if (dev->features&NETIF_F_HIGHDMA)
|
return 0;
|
return 0;
|
|
|
for (i=0; i<skb_shinfo(skb)->nr_frags; i++)
|
for (i=0; i<skb_shinfo(skb)->nr_frags; i++)
|
if (skb_shinfo(skb)->frags[i].page >= highmem_start_page)
|
if (skb_shinfo(skb)->frags[i].page >= highmem_start_page)
|
return 1;
|
return 1;
|
|
|
return 0;
|
return 0;
|
}
|
}
|
#else
|
#else
|
#define illegal_highdma(dev, skb) (0)
|
#define illegal_highdma(dev, skb) (0)
|
#endif
|
#endif
|
|
|
/**
|
/**
|
* dev_queue_xmit - transmit a buffer
|
* dev_queue_xmit - transmit a buffer
|
* @skb: buffer to transmit
|
* @skb: buffer to transmit
|
*
|
*
|
* Queue a buffer for transmission to a network device. The caller must
|
* Queue a buffer for transmission to a network device. The caller must
|
* have set the device and priority and built the buffer before calling this
|
* have set the device and priority and built the buffer before calling this
|
* function. The function can be called from an interrupt.
|
* function. The function can be called from an interrupt.
|
*
|
*
|
* A negative errno code is returned on a failure. A success does not
|
* A negative errno code is returned on a failure. A success does not
|
* guarantee the frame will be transmitted as it may be dropped due
|
* guarantee the frame will be transmitted as it may be dropped due
|
* to congestion or traffic shaping.
|
* to congestion or traffic shaping.
|
*/
|
*/
|
|
|
int dev_queue_xmit(struct sk_buff *skb)
|
int dev_queue_xmit(struct sk_buff *skb)
|
{
|
{
|
struct net_device *dev = skb->dev;
|
struct net_device *dev = skb->dev;
|
struct Qdisc *q;
|
struct Qdisc *q;
|
|
|
if (skb_shinfo(skb)->frag_list &&
|
if (skb_shinfo(skb)->frag_list &&
|
!(dev->features&NETIF_F_FRAGLIST) &&
|
!(dev->features&NETIF_F_FRAGLIST) &&
|
skb_linearize(skb, GFP_ATOMIC) != 0) {
|
skb_linearize(skb, GFP_ATOMIC) != 0) {
|
kfree_skb(skb);
|
kfree_skb(skb);
|
return -ENOMEM;
|
return -ENOMEM;
|
}
|
}
|
|
|
/* Fragmented skb is linearized if device does not support SG,
|
/* Fragmented skb is linearized if device does not support SG,
|
* or if at least one of fragments is in highmem and device
|
* or if at least one of fragments is in highmem and device
|
* does not support DMA from it.
|
* does not support DMA from it.
|
*/
|
*/
|
if (skb_shinfo(skb)->nr_frags &&
|
if (skb_shinfo(skb)->nr_frags &&
|
(!(dev->features&NETIF_F_SG) || illegal_highdma(dev, skb)) &&
|
(!(dev->features&NETIF_F_SG) || illegal_highdma(dev, skb)) &&
|
skb_linearize(skb, GFP_ATOMIC) != 0) {
|
skb_linearize(skb, GFP_ATOMIC) != 0) {
|
kfree_skb(skb);
|
kfree_skb(skb);
|
return -ENOMEM;
|
return -ENOMEM;
|
}
|
}
|
|
|
/* If packet is not checksummed and device does not support
|
/* If packet is not checksummed and device does not support
|
* checksumming for this protocol, complete checksumming here.
|
* checksumming for this protocol, complete checksumming here.
|
*/
|
*/
|
if (skb->ip_summed == CHECKSUM_HW &&
|
if (skb->ip_summed == CHECKSUM_HW &&
|
(!(dev->features&(NETIF_F_HW_CSUM|NETIF_F_NO_CSUM)) &&
|
(!(dev->features&(NETIF_F_HW_CSUM|NETIF_F_NO_CSUM)) &&
|
(!(dev->features&NETIF_F_IP_CSUM) ||
|
(!(dev->features&NETIF_F_IP_CSUM) ||
|
skb->protocol != htons(ETH_P_IP)))) {
|
skb->protocol != htons(ETH_P_IP)))) {
|
if ((skb = skb_checksum_help(skb)) == NULL)
|
if ((skb = skb_checksum_help(skb)) == NULL)
|
return -ENOMEM;
|
return -ENOMEM;
|
}
|
}
|
|
|
/* Grab device queue */
|
/* Grab device queue */
|
spin_lock_bh(&dev->queue_lock);
|
spin_lock_bh(&dev->queue_lock);
|
q = dev->qdisc;
|
q = dev->qdisc;
|
if (q->enqueue) {
|
if (q->enqueue) {
|
int ret = q->enqueue(skb, q);
|
int ret = q->enqueue(skb, q);
|
|
|
qdisc_run(dev);
|
qdisc_run(dev);
|
|
|
spin_unlock_bh(&dev->queue_lock);
|
spin_unlock_bh(&dev->queue_lock);
|
return ret == NET_XMIT_BYPASS ? NET_XMIT_SUCCESS : ret;
|
return ret == NET_XMIT_BYPASS ? NET_XMIT_SUCCESS : ret;
|
}
|
}
|
|
|
/* The device has no queue. Common case for software devices:
|
/* The device has no queue. Common case for software devices:
|
loopback, all the sorts of tunnels...
|
loopback, all the sorts of tunnels...
|
|
|
Really, it is unlikely that xmit_lock protection is necessary here.
|
Really, it is unlikely that xmit_lock protection is necessary here.
|
(f.e. loopback and IP tunnels are clean ignoring statistics counters.)
|
(f.e. loopback and IP tunnels are clean ignoring statistics counters.)
|
However, it is possible, that they rely on protection
|
However, it is possible, that they rely on protection
|
made by us here.
|
made by us here.
|
|
|
Check this and shot the lock. It is not prone from deadlocks.
|
Check this and shot the lock. It is not prone from deadlocks.
|
Either shot noqueue qdisc, it is even simpler 8)
|
Either shot noqueue qdisc, it is even simpler 8)
|
*/
|
*/
|
if (dev->flags&IFF_UP) {
|
if (dev->flags&IFF_UP) {
|
int cpu = smp_processor_id();
|
int cpu = smp_processor_id();
|
|
|
if (dev->xmit_lock_owner != cpu) {
|
if (dev->xmit_lock_owner != cpu) {
|
spin_unlock(&dev->queue_lock);
|
spin_unlock(&dev->queue_lock);
|
spin_lock(&dev->xmit_lock);
|
spin_lock(&dev->xmit_lock);
|
dev->xmit_lock_owner = cpu;
|
dev->xmit_lock_owner = cpu;
|
|
|
if (!netif_queue_stopped(dev)) {
|
if (!netif_queue_stopped(dev)) {
|
if (netdev_nit)
|
if (netdev_nit)
|
dev_queue_xmit_nit(skb,dev);
|
dev_queue_xmit_nit(skb,dev);
|
|
|
if (dev->hard_start_xmit(skb, dev) == 0) {
|
if (dev->hard_start_xmit(skb, dev) == 0) {
|
dev->xmit_lock_owner = -1;
|
dev->xmit_lock_owner = -1;
|
spin_unlock_bh(&dev->xmit_lock);
|
spin_unlock_bh(&dev->xmit_lock);
|
return 0;
|
return 0;
|
}
|
}
|
}
|
}
|
dev->xmit_lock_owner = -1;
|
dev->xmit_lock_owner = -1;
|
spin_unlock_bh(&dev->xmit_lock);
|
spin_unlock_bh(&dev->xmit_lock);
|
if (net_ratelimit())
|
if (net_ratelimit())
|
printk(KERN_CRIT "Virtual device %s asks to queue packet!\n", dev->name);
|
printk(KERN_CRIT "Virtual device %s asks to queue packet!\n", dev->name);
|
kfree_skb(skb);
|
kfree_skb(skb);
|
return -ENETDOWN;
|
return -ENETDOWN;
|
} else {
|
} else {
|
/* Recursion is detected! It is possible, unfortunately */
|
/* Recursion is detected! It is possible, unfortunately */
|
if (net_ratelimit())
|
if (net_ratelimit())
|
printk(KERN_CRIT "Dead loop on virtual device %s, fix it urgently!\n", dev->name);
|
printk(KERN_CRIT "Dead loop on virtual device %s, fix it urgently!\n", dev->name);
|
}
|
}
|
}
|
}
|
spin_unlock_bh(&dev->queue_lock);
|
spin_unlock_bh(&dev->queue_lock);
|
|
|
kfree_skb(skb);
|
kfree_skb(skb);
|
return -ENETDOWN;
|
return -ENETDOWN;
|
}
|
}
|
|
|
|
|
/*=======================================================================
|
/*=======================================================================
|
Receiver routines
|
Receiver routines
|
=======================================================================*/
|
=======================================================================*/
|
|
|
int netdev_max_backlog = 300;
|
int netdev_max_backlog = 300;
|
int weight_p = 64; /* old backlog weight */
|
int weight_p = 64; /* old backlog weight */
|
/* These numbers are selected based on intuition and some
|
/* These numbers are selected based on intuition and some
|
* experimentatiom, if you have more scientific way of doing this
|
* experimentatiom, if you have more scientific way of doing this
|
* please go ahead and fix things.
|
* please go ahead and fix things.
|
*/
|
*/
|
int no_cong_thresh = 10;
|
int no_cong_thresh = 10;
|
int no_cong = 20;
|
int no_cong = 20;
|
int lo_cong = 100;
|
int lo_cong = 100;
|
int mod_cong = 290;
|
int mod_cong = 290;
|
|
|
struct netif_rx_stats netdev_rx_stat[NR_CPUS];
|
struct netif_rx_stats netdev_rx_stat[NR_CPUS];
|
|
|
|
|
#ifdef CONFIG_NET_HW_FLOWCONTROL
|
#ifdef CONFIG_NET_HW_FLOWCONTROL
|
atomic_t netdev_dropping = ATOMIC_INIT(0);
|
atomic_t netdev_dropping = ATOMIC_INIT(0);
|
static unsigned long netdev_fc_mask = 1;
|
static unsigned long netdev_fc_mask = 1;
|
unsigned long netdev_fc_xoff = 0;
|
unsigned long netdev_fc_xoff = 0;
|
spinlock_t netdev_fc_lock = SPIN_LOCK_UNLOCKED;
|
spinlock_t netdev_fc_lock = SPIN_LOCK_UNLOCKED;
|
|
|
static struct
|
static struct
|
{
|
{
|
void (*stimul)(struct net_device *);
|
void (*stimul)(struct net_device *);
|
struct net_device *dev;
|
struct net_device *dev;
|
} netdev_fc_slots[BITS_PER_LONG];
|
} netdev_fc_slots[BITS_PER_LONG];
|
|
|
int netdev_register_fc(struct net_device *dev, void (*stimul)(struct net_device *dev))
|
int netdev_register_fc(struct net_device *dev, void (*stimul)(struct net_device *dev))
|
{
|
{
|
int bit = 0;
|
int bit = 0;
|
unsigned long flags;
|
unsigned long flags;
|
|
|
spin_lock_irqsave(&netdev_fc_lock, flags);
|
spin_lock_irqsave(&netdev_fc_lock, flags);
|
if (netdev_fc_mask != ~0UL) {
|
if (netdev_fc_mask != ~0UL) {
|
bit = ffz(netdev_fc_mask);
|
bit = ffz(netdev_fc_mask);
|
netdev_fc_slots[bit].stimul = stimul;
|
netdev_fc_slots[bit].stimul = stimul;
|
netdev_fc_slots[bit].dev = dev;
|
netdev_fc_slots[bit].dev = dev;
|
set_bit(bit, &netdev_fc_mask);
|
set_bit(bit, &netdev_fc_mask);
|
clear_bit(bit, &netdev_fc_xoff);
|
clear_bit(bit, &netdev_fc_xoff);
|
}
|
}
|
spin_unlock_irqrestore(&netdev_fc_lock, flags);
|
spin_unlock_irqrestore(&netdev_fc_lock, flags);
|
return bit;
|
return bit;
|
}
|
}
|
|
|
void netdev_unregister_fc(int bit)
|
void netdev_unregister_fc(int bit)
|
{
|
{
|
unsigned long flags;
|
unsigned long flags;
|
|
|
spin_lock_irqsave(&netdev_fc_lock, flags);
|
spin_lock_irqsave(&netdev_fc_lock, flags);
|
if (bit > 0) {
|
if (bit > 0) {
|
netdev_fc_slots[bit].stimul = NULL;
|
netdev_fc_slots[bit].stimul = NULL;
|
netdev_fc_slots[bit].dev = NULL;
|
netdev_fc_slots[bit].dev = NULL;
|
clear_bit(bit, &netdev_fc_mask);
|
clear_bit(bit, &netdev_fc_mask);
|
clear_bit(bit, &netdev_fc_xoff);
|
clear_bit(bit, &netdev_fc_xoff);
|
}
|
}
|
spin_unlock_irqrestore(&netdev_fc_lock, flags);
|
spin_unlock_irqrestore(&netdev_fc_lock, flags);
|
}
|
}
|
|
|
static void netdev_wakeup(void)
|
static void netdev_wakeup(void)
|
{
|
{
|
unsigned long xoff;
|
unsigned long xoff;
|
|
|
spin_lock(&netdev_fc_lock);
|
spin_lock(&netdev_fc_lock);
|
xoff = netdev_fc_xoff;
|
xoff = netdev_fc_xoff;
|
netdev_fc_xoff = 0;
|
netdev_fc_xoff = 0;
|
while (xoff) {
|
while (xoff) {
|
int i = ffz(~xoff);
|
int i = ffz(~xoff);
|
xoff &= ~(1<<i);
|
xoff &= ~(1<<i);
|
netdev_fc_slots[i].stimul(netdev_fc_slots[i].dev);
|
netdev_fc_slots[i].stimul(netdev_fc_slots[i].dev);
|
}
|
}
|
spin_unlock(&netdev_fc_lock);
|
spin_unlock(&netdev_fc_lock);
|
}
|
}
|
#endif
|
#endif
|
|
|
static void get_sample_stats(int cpu)
|
static void get_sample_stats(int cpu)
|
{
|
{
|
#ifdef RAND_LIE
|
#ifdef RAND_LIE
|
unsigned long rd;
|
unsigned long rd;
|
int rq;
|
int rq;
|
#endif
|
#endif
|
int blog = softnet_data[cpu].input_pkt_queue.qlen;
|
int blog = softnet_data[cpu].input_pkt_queue.qlen;
|
int avg_blog = softnet_data[cpu].avg_blog;
|
int avg_blog = softnet_data[cpu].avg_blog;
|
|
|
avg_blog = (avg_blog >> 1)+ (blog >> 1);
|
avg_blog = (avg_blog >> 1)+ (blog >> 1);
|
|
|
if (avg_blog > mod_cong) {
|
if (avg_blog > mod_cong) {
|
/* Above moderate congestion levels. */
|
/* Above moderate congestion levels. */
|
softnet_data[cpu].cng_level = NET_RX_CN_HIGH;
|
softnet_data[cpu].cng_level = NET_RX_CN_HIGH;
|
#ifdef RAND_LIE
|
#ifdef RAND_LIE
|
rd = net_random();
|
rd = net_random();
|
rq = rd % netdev_max_backlog;
|
rq = rd % netdev_max_backlog;
|
if (rq < avg_blog) /* unlucky bastard */
|
if (rq < avg_blog) /* unlucky bastard */
|
softnet_data[cpu].cng_level = NET_RX_DROP;
|
softnet_data[cpu].cng_level = NET_RX_DROP;
|
#endif
|
#endif
|
} else if (avg_blog > lo_cong) {
|
} else if (avg_blog > lo_cong) {
|
softnet_data[cpu].cng_level = NET_RX_CN_MOD;
|
softnet_data[cpu].cng_level = NET_RX_CN_MOD;
|
#ifdef RAND_LIE
|
#ifdef RAND_LIE
|
rd = net_random();
|
rd = net_random();
|
rq = rd % netdev_max_backlog;
|
rq = rd % netdev_max_backlog;
|
if (rq < avg_blog) /* unlucky bastard */
|
if (rq < avg_blog) /* unlucky bastard */
|
softnet_data[cpu].cng_level = NET_RX_CN_HIGH;
|
softnet_data[cpu].cng_level = NET_RX_CN_HIGH;
|
#endif
|
#endif
|
} else if (avg_blog > no_cong)
|
} else if (avg_blog > no_cong)
|
softnet_data[cpu].cng_level = NET_RX_CN_LOW;
|
softnet_data[cpu].cng_level = NET_RX_CN_LOW;
|
else /* no congestion */
|
else /* no congestion */
|
softnet_data[cpu].cng_level = NET_RX_SUCCESS;
|
softnet_data[cpu].cng_level = NET_RX_SUCCESS;
|
|
|
softnet_data[cpu].avg_blog = avg_blog;
|
softnet_data[cpu].avg_blog = avg_blog;
|
}
|
}
|
|
|
#ifdef OFFLINE_SAMPLE
|
#ifdef OFFLINE_SAMPLE
|
static void sample_queue(unsigned long dummy)
|
static void sample_queue(unsigned long dummy)
|
{
|
{
|
/* 10 ms 0r 1ms -- i dont care -- JHS */
|
/* 10 ms 0r 1ms -- i dont care -- JHS */
|
int next_tick = 1;
|
int next_tick = 1;
|
int cpu = smp_processor_id();
|
int cpu = smp_processor_id();
|
|
|
get_sample_stats(cpu);
|
get_sample_stats(cpu);
|
next_tick += jiffies;
|
next_tick += jiffies;
|
mod_timer(&samp_timer, next_tick);
|
mod_timer(&samp_timer, next_tick);
|
}
|
}
|
#endif
|
#endif
|
|
|
|
|
/**
|
/**
|
* netif_rx - post buffer to the network code
|
* netif_rx - post buffer to the network code
|
* @skb: buffer to post
|
* @skb: buffer to post
|
*
|
*
|
* This function receives a packet from a device driver and queues it for
|
* This function receives a packet from a device driver and queues it for
|
* the upper (protocol) levels to process. It always succeeds. The buffer
|
* the upper (protocol) levels to process. It always succeeds. The buffer
|
* may be dropped during processing for congestion control or by the
|
* may be dropped during processing for congestion control or by the
|
* protocol layers.
|
* protocol layers.
|
*
|
*
|
* return values:
|
* return values:
|
* NET_RX_SUCCESS (no congestion)
|
* NET_RX_SUCCESS (no congestion)
|
* NET_RX_CN_LOW (low congestion)
|
* NET_RX_CN_LOW (low congestion)
|
* NET_RX_CN_MOD (moderate congestion)
|
* NET_RX_CN_MOD (moderate congestion)
|
* NET_RX_CN_HIGH (high congestion)
|
* NET_RX_CN_HIGH (high congestion)
|
* NET_RX_DROP (packet was dropped)
|
* NET_RX_DROP (packet was dropped)
|
*
|
*
|
*
|
*
|
*/
|
*/
|
|
|
int netif_rx(struct sk_buff *skb)
|
int netif_rx(struct sk_buff *skb)
|
{
|
{
|
int this_cpu = smp_processor_id();
|
int this_cpu = smp_processor_id();
|
struct softnet_data *queue;
|
struct softnet_data *queue;
|
unsigned long flags;
|
unsigned long flags;
|
|
|
if (skb->stamp.tv_sec == 0)
|
if (skb->stamp.tv_sec == 0)
|
do_gettimeofday(&skb->stamp);
|
do_gettimeofday(&skb->stamp);
|
|
|
/* The code is rearranged so that the path is the most
|
/* The code is rearranged so that the path is the most
|
short when CPU is congested, but is still operating.
|
short when CPU is congested, but is still operating.
|
*/
|
*/
|
queue = &softnet_data[this_cpu];
|
queue = &softnet_data[this_cpu];
|
|
|
local_irq_save(flags);
|
local_irq_save(flags);
|
|
|
netdev_rx_stat[this_cpu].total++;
|
netdev_rx_stat[this_cpu].total++;
|
if (queue->input_pkt_queue.qlen <= netdev_max_backlog) {
|
if (queue->input_pkt_queue.qlen <= netdev_max_backlog) {
|
if (queue->input_pkt_queue.qlen) {
|
if (queue->input_pkt_queue.qlen) {
|
if (queue->throttle)
|
if (queue->throttle)
|
goto drop;
|
goto drop;
|
|
|
enqueue:
|
enqueue:
|
dev_hold(skb->dev);
|
dev_hold(skb->dev);
|
__skb_queue_tail(&queue->input_pkt_queue,skb);
|
__skb_queue_tail(&queue->input_pkt_queue,skb);
|
local_irq_restore(flags);
|
local_irq_restore(flags);
|
#ifndef OFFLINE_SAMPLE
|
#ifndef OFFLINE_SAMPLE
|
get_sample_stats(this_cpu);
|
get_sample_stats(this_cpu);
|
#endif
|
#endif
|
return queue->cng_level;
|
return queue->cng_level;
|
}
|
}
|
|
|
if (queue->throttle) {
|
if (queue->throttle) {
|
queue->throttle = 0;
|
queue->throttle = 0;
|
#ifdef CONFIG_NET_HW_FLOWCONTROL
|
#ifdef CONFIG_NET_HW_FLOWCONTROL
|
if (atomic_dec_and_test(&netdev_dropping))
|
if (atomic_dec_and_test(&netdev_dropping))
|
netdev_wakeup();
|
netdev_wakeup();
|
#endif
|
#endif
|
}
|
}
|
|
|
netif_rx_schedule(&queue->blog_dev);
|
netif_rx_schedule(&queue->blog_dev);
|
goto enqueue;
|
goto enqueue;
|
}
|
}
|
|
|
if (queue->throttle == 0) {
|
if (queue->throttle == 0) {
|
queue->throttle = 1;
|
queue->throttle = 1;
|
netdev_rx_stat[this_cpu].throttled++;
|
netdev_rx_stat[this_cpu].throttled++;
|
#ifdef CONFIG_NET_HW_FLOWCONTROL
|
#ifdef CONFIG_NET_HW_FLOWCONTROL
|
atomic_inc(&netdev_dropping);
|
atomic_inc(&netdev_dropping);
|
#endif
|
#endif
|
}
|
}
|
|
|
drop:
|
drop:
|
netdev_rx_stat[this_cpu].dropped++;
|
netdev_rx_stat[this_cpu].dropped++;
|
local_irq_restore(flags);
|
local_irq_restore(flags);
|
|
|
kfree_skb(skb);
|
kfree_skb(skb);
|
return NET_RX_DROP;
|
return NET_RX_DROP;
|
}
|
}
|
|
|
/* Deliver skb to an old protocol, which is not threaded well
|
/* Deliver skb to an old protocol, which is not threaded well
|
or which do not understand shared skbs.
|
or which do not understand shared skbs.
|
*/
|
*/
|
static int deliver_to_old_ones(struct packet_type *pt, struct sk_buff *skb, int last)
|
static int deliver_to_old_ones(struct packet_type *pt, struct sk_buff *skb, int last)
|
{
|
{
|
static spinlock_t net_bh_lock = SPIN_LOCK_UNLOCKED;
|
static spinlock_t net_bh_lock = SPIN_LOCK_UNLOCKED;
|
int ret = NET_RX_DROP;
|
int ret = NET_RX_DROP;
|
|
|
|
|
if (!last) {
|
if (!last) {
|
skb = skb_clone(skb, GFP_ATOMIC);
|
skb = skb_clone(skb, GFP_ATOMIC);
|
if (skb == NULL)
|
if (skb == NULL)
|
return ret;
|
return ret;
|
}
|
}
|
if (skb_is_nonlinear(skb) && skb_linearize(skb, GFP_ATOMIC) != 0) {
|
if (skb_is_nonlinear(skb) && skb_linearize(skb, GFP_ATOMIC) != 0) {
|
kfree_skb(skb);
|
kfree_skb(skb);
|
return ret;
|
return ret;
|
}
|
}
|
|
|
/* The assumption (correct one) is that old protocols
|
/* The assumption (correct one) is that old protocols
|
did not depened on BHs different of NET_BH and TIMER_BH.
|
did not depened on BHs different of NET_BH and TIMER_BH.
|
*/
|
*/
|
|
|
/* Emulate NET_BH with special spinlock */
|
/* Emulate NET_BH with special spinlock */
|
spin_lock(&net_bh_lock);
|
spin_lock(&net_bh_lock);
|
|
|
/* Disable timers and wait for all timers completion */
|
/* Disable timers and wait for all timers completion */
|
tasklet_disable(bh_task_vec+TIMER_BH);
|
tasklet_disable(bh_task_vec+TIMER_BH);
|
|
|
ret = pt->func(skb, skb->dev, pt);
|
ret = pt->func(skb, skb->dev, pt);
|
|
|
tasklet_hi_enable(bh_task_vec+TIMER_BH);
|
tasklet_hi_enable(bh_task_vec+TIMER_BH);
|
spin_unlock(&net_bh_lock);
|
spin_unlock(&net_bh_lock);
|
return ret;
|
return ret;
|
}
|
}
|
|
|
static __inline__ void skb_bond(struct sk_buff *skb)
|
static __inline__ void skb_bond(struct sk_buff *skb)
|
{
|
{
|
struct net_device *dev = skb->dev;
|
struct net_device *dev = skb->dev;
|
|
|
if (dev->master) {
|
if (dev->master) {
|
skb->real_dev = skb->dev;
|
skb->real_dev = skb->dev;
|
skb->dev = dev->master;
|
skb->dev = dev->master;
|
}
|
}
|
}
|
}
|
|
|
static void net_tx_action(struct softirq_action *h)
|
static void net_tx_action(struct softirq_action *h)
|
{
|
{
|
int cpu = smp_processor_id();
|
int cpu = smp_processor_id();
|
|
|
if (softnet_data[cpu].completion_queue) {
|
if (softnet_data[cpu].completion_queue) {
|
struct sk_buff *clist;
|
struct sk_buff *clist;
|
|
|
local_irq_disable();
|
local_irq_disable();
|
clist = softnet_data[cpu].completion_queue;
|
clist = softnet_data[cpu].completion_queue;
|
softnet_data[cpu].completion_queue = NULL;
|
softnet_data[cpu].completion_queue = NULL;
|
local_irq_enable();
|
local_irq_enable();
|
|
|
while (clist != NULL) {
|
while (clist != NULL) {
|
struct sk_buff *skb = clist;
|
struct sk_buff *skb = clist;
|
clist = clist->next;
|
clist = clist->next;
|
|
|
BUG_TRAP(atomic_read(&skb->users) == 0);
|
BUG_TRAP(atomic_read(&skb->users) == 0);
|
__kfree_skb(skb);
|
__kfree_skb(skb);
|
}
|
}
|
}
|
}
|
|
|
if (softnet_data[cpu].output_queue) {
|
if (softnet_data[cpu].output_queue) {
|
struct net_device *head;
|
struct net_device *head;
|
|
|
local_irq_disable();
|
local_irq_disable();
|
head = softnet_data[cpu].output_queue;
|
head = softnet_data[cpu].output_queue;
|
softnet_data[cpu].output_queue = NULL;
|
softnet_data[cpu].output_queue = NULL;
|
local_irq_enable();
|
local_irq_enable();
|
|
|
while (head != NULL) {
|
while (head != NULL) {
|
struct net_device *dev = head;
|
struct net_device *dev = head;
|
head = head->next_sched;
|
head = head->next_sched;
|
|
|
smp_mb__before_clear_bit();
|
smp_mb__before_clear_bit();
|
clear_bit(__LINK_STATE_SCHED, &dev->state);
|
clear_bit(__LINK_STATE_SCHED, &dev->state);
|
|
|
if (spin_trylock(&dev->queue_lock)) {
|
if (spin_trylock(&dev->queue_lock)) {
|
qdisc_run(dev);
|
qdisc_run(dev);
|
spin_unlock(&dev->queue_lock);
|
spin_unlock(&dev->queue_lock);
|
} else {
|
} else {
|
netif_schedule(dev);
|
netif_schedule(dev);
|
}
|
}
|
}
|
}
|
}
|
}
|
}
|
}
|
|
|
|
|
#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
|
#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
|
void (*br_handle_frame_hook)(struct sk_buff *skb) = NULL;
|
void (*br_handle_frame_hook)(struct sk_buff *skb) = NULL;
|
#endif
|
#endif
|
|
|
static __inline__ int handle_bridge(struct sk_buff *skb,
|
static __inline__ int handle_bridge(struct sk_buff *skb,
|
struct packet_type *pt_prev)
|
struct packet_type *pt_prev)
|
{
|
{
|
int ret = NET_RX_DROP;
|
int ret = NET_RX_DROP;
|
|
|
if (pt_prev) {
|
if (pt_prev) {
|
if (!pt_prev->data)
|
if (!pt_prev->data)
|
ret = deliver_to_old_ones(pt_prev, skb, 0);
|
ret = deliver_to_old_ones(pt_prev, skb, 0);
|
else {
|
else {
|
atomic_inc(&skb->users);
|
atomic_inc(&skb->users);
|
ret = pt_prev->func(skb, skb->dev, pt_prev);
|
ret = pt_prev->func(skb, skb->dev, pt_prev);
|
}
|
}
|
}
|
}
|
|
|
br_handle_frame_hook(skb);
|
br_handle_frame_hook(skb);
|
return ret;
|
return ret;
|
}
|
}
|
|
|
|
|
#ifdef CONFIG_NET_DIVERT
|
#ifdef CONFIG_NET_DIVERT
|
static inline int handle_diverter(struct sk_buff *skb)
|
static inline int handle_diverter(struct sk_buff *skb)
|
{
|
{
|
/* if diversion is supported on device, then divert */
|
/* if diversion is supported on device, then divert */
|
if (skb->dev->divert && skb->dev->divert->divert)
|
if (skb->dev->divert && skb->dev->divert->divert)
|
divert_frame(skb);
|
divert_frame(skb);
|
return 0;
|
return 0;
|
}
|
}
|
#endif /* CONFIG_NET_DIVERT */
|
#endif /* CONFIG_NET_DIVERT */
|
|
|
int netif_receive_skb(struct sk_buff *skb)
|
int netif_receive_skb(struct sk_buff *skb)
|
{
|
{
|
struct packet_type *ptype, *pt_prev;
|
struct packet_type *ptype, *pt_prev;
|
int ret = NET_RX_DROP;
|
int ret = NET_RX_DROP;
|
unsigned short type;
|
unsigned short type;
|
|
|
if (skb->stamp.tv_sec == 0)
|
if (skb->stamp.tv_sec == 0)
|
do_gettimeofday(&skb->stamp);
|
do_gettimeofday(&skb->stamp);
|
|
|
skb_bond(skb);
|
skb_bond(skb);
|
|
|
netdev_rx_stat[smp_processor_id()].total++;
|
netdev_rx_stat[smp_processor_id()].total++;
|
|
|
#ifdef CONFIG_NET_FASTROUTE
|
#ifdef CONFIG_NET_FASTROUTE
|
if (skb->pkt_type == PACKET_FASTROUTE) {
|
if (skb->pkt_type == PACKET_FASTROUTE) {
|
netdev_rx_stat[smp_processor_id()].fastroute_deferred_out++;
|
netdev_rx_stat[smp_processor_id()].fastroute_deferred_out++;
|
return dev_queue_xmit(skb);
|
return dev_queue_xmit(skb);
|
}
|
}
|
#endif
|
#endif
|
|
|
skb->h.raw = skb->nh.raw = skb->data;
|
skb->h.raw = skb->nh.raw = skb->data;
|
|
|
pt_prev = NULL;
|
pt_prev = NULL;
|
for (ptype = ptype_all; ptype; ptype = ptype->next) {
|
for (ptype = ptype_all; ptype; ptype = ptype->next) {
|
if (!ptype->dev || ptype->dev == skb->dev) {
|
if (!ptype->dev || ptype->dev == skb->dev) {
|
if (pt_prev) {
|
if (pt_prev) {
|
if (!pt_prev->data) {
|
if (!pt_prev->data) {
|
ret = deliver_to_old_ones(pt_prev, skb, 0);
|
ret = deliver_to_old_ones(pt_prev, skb, 0);
|
} else {
|
} else {
|
atomic_inc(&skb->users);
|
atomic_inc(&skb->users);
|
ret = pt_prev->func(skb, skb->dev, pt_prev);
|
ret = pt_prev->func(skb, skb->dev, pt_prev);
|
}
|
}
|
}
|
}
|
pt_prev = ptype;
|
pt_prev = ptype;
|
}
|
}
|
}
|
}
|
|
|
#ifdef CONFIG_NET_DIVERT
|
#ifdef CONFIG_NET_DIVERT
|
if (skb->dev->divert && skb->dev->divert->divert)
|
if (skb->dev->divert && skb->dev->divert->divert)
|
ret = handle_diverter(skb);
|
ret = handle_diverter(skb);
|
#endif /* CONFIG_NET_DIVERT */
|
#endif /* CONFIG_NET_DIVERT */
|
|
|
#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
|
#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
|
if (skb->dev->br_port != NULL && br_handle_frame_hook != NULL &&
|
if (skb->dev->br_port != NULL && br_handle_frame_hook != NULL &&
|
skb->pkt_type != PACKET_LOOPBACK) {
|
skb->pkt_type != PACKET_LOOPBACK) {
|
return handle_bridge(skb, pt_prev);
|
return handle_bridge(skb, pt_prev);
|
}
|
}
|
#endif
|
#endif
|
|
|
type = skb->protocol;
|
type = skb->protocol;
|
for (ptype=ptype_base[ntohs(type)&15];ptype;ptype=ptype->next) {
|
for (ptype=ptype_base[ntohs(type)&15];ptype;ptype=ptype->next) {
|
if (ptype->type == type &&
|
if (ptype->type == type &&
|
(!ptype->dev || ptype->dev == skb->dev)) {
|
(!ptype->dev || ptype->dev == skb->dev)) {
|
if (pt_prev) {
|
if (pt_prev) {
|
if (!pt_prev->data) {
|
if (!pt_prev->data) {
|
ret = deliver_to_old_ones(pt_prev, skb, 0);
|
ret = deliver_to_old_ones(pt_prev, skb, 0);
|
} else {
|
} else {
|
atomic_inc(&skb->users);
|
atomic_inc(&skb->users);
|
ret = pt_prev->func(skb, skb->dev, pt_prev);
|
ret = pt_prev->func(skb, skb->dev, pt_prev);
|
}
|
}
|
}
|
}
|
pt_prev = ptype;
|
pt_prev = ptype;
|
}
|
}
|
}
|
}
|
|
|
if (pt_prev) {
|
if (pt_prev) {
|
if (!pt_prev->data) {
|
if (!pt_prev->data) {
|
ret = deliver_to_old_ones(pt_prev, skb, 1);
|
ret = deliver_to_old_ones(pt_prev, skb, 1);
|
} else {
|
} else {
|
ret = pt_prev->func(skb, skb->dev, pt_prev);
|
ret = pt_prev->func(skb, skb->dev, pt_prev);
|
}
|
}
|
} else {
|
} else {
|
kfree_skb(skb);
|
kfree_skb(skb);
|
/* Jamal, now you will not able to escape explaining
|
/* Jamal, now you will not able to escape explaining
|
* me how you were going to use this. :-)
|
* me how you were going to use this. :-)
|
*/
|
*/
|
ret = NET_RX_DROP;
|
ret = NET_RX_DROP;
|
}
|
}
|
|
|
return ret;
|
return ret;
|
}
|
}
|
|
|
static int process_backlog(struct net_device *backlog_dev, int *budget)
|
static int process_backlog(struct net_device *backlog_dev, int *budget)
|
{
|
{
|
int work = 0;
|
int work = 0;
|
int quota = min(backlog_dev->quota, *budget);
|
int quota = min(backlog_dev->quota, *budget);
|
int this_cpu = smp_processor_id();
|
int this_cpu = smp_processor_id();
|
struct softnet_data *queue = &softnet_data[this_cpu];
|
struct softnet_data *queue = &softnet_data[this_cpu];
|
unsigned long start_time = jiffies;
|
unsigned long start_time = jiffies;
|
|
|
for (;;) {
|
for (;;) {
|
struct sk_buff *skb;
|
struct sk_buff *skb;
|
struct net_device *dev;
|
struct net_device *dev;
|
|
|
local_irq_disable();
|
local_irq_disable();
|
skb = __skb_dequeue(&queue->input_pkt_queue);
|
skb = __skb_dequeue(&queue->input_pkt_queue);
|
if (skb == NULL)
|
if (skb == NULL)
|
goto job_done;
|
goto job_done;
|
local_irq_enable();
|
local_irq_enable();
|
|
|
dev = skb->dev;
|
dev = skb->dev;
|
|
|
netif_receive_skb(skb);
|
netif_receive_skb(skb);
|
|
|
dev_put(dev);
|
dev_put(dev);
|
|
|
work++;
|
work++;
|
|
|
if (work >= quota || jiffies - start_time > 1)
|
if (work >= quota || jiffies - start_time > 1)
|
break;
|
break;
|
|
|
#ifdef CONFIG_NET_HW_FLOWCONTROL
|
#ifdef CONFIG_NET_HW_FLOWCONTROL
|
if (queue->throttle && queue->input_pkt_queue.qlen < no_cong_thresh ) {
|
if (queue->throttle && queue->input_pkt_queue.qlen < no_cong_thresh ) {
|
queue->throttle = 0;
|
queue->throttle = 0;
|
if (atomic_dec_and_test(&netdev_dropping)) {
|
if (atomic_dec_and_test(&netdev_dropping)) {
|
netdev_wakeup();
|
netdev_wakeup();
|
break;
|
break;
|
}
|
}
|
}
|
}
|
#endif
|
#endif
|
}
|
}
|
|
|
backlog_dev->quota -= work;
|
backlog_dev->quota -= work;
|
*budget -= work;
|
*budget -= work;
|
return -1;
|
return -1;
|
|
|
job_done:
|
job_done:
|
backlog_dev->quota -= work;
|
backlog_dev->quota -= work;
|
*budget -= work;
|
*budget -= work;
|
|
|
list_del(&backlog_dev->poll_list);
|
list_del(&backlog_dev->poll_list);
|
smp_mb__before_clear_bit();
|
smp_mb__before_clear_bit();
|
netif_poll_enable(backlog_dev);
|
netif_poll_enable(backlog_dev);
|
|
|
if (queue->throttle) {
|
if (queue->throttle) {
|
queue->throttle = 0;
|
queue->throttle = 0;
|
#ifdef CONFIG_NET_HW_FLOWCONTROL
|
#ifdef CONFIG_NET_HW_FLOWCONTROL
|
if (atomic_dec_and_test(&netdev_dropping))
|
if (atomic_dec_and_test(&netdev_dropping))
|
netdev_wakeup();
|
netdev_wakeup();
|
#endif
|
#endif
|
}
|
}
|
local_irq_enable();
|
local_irq_enable();
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static void net_rx_action(struct softirq_action *h)
|
static void net_rx_action(struct softirq_action *h)
|
{
|
{
|
int this_cpu = smp_processor_id();
|
int this_cpu = smp_processor_id();
|
struct softnet_data *queue = &softnet_data[this_cpu];
|
struct softnet_data *queue = &softnet_data[this_cpu];
|
unsigned long start_time = jiffies;
|
unsigned long start_time = jiffies;
|
int budget = netdev_max_backlog;
|
int budget = netdev_max_backlog;
|
|
|
br_read_lock(BR_NETPROTO_LOCK);
|
br_read_lock(BR_NETPROTO_LOCK);
|
local_irq_disable();
|
local_irq_disable();
|
|
|
while (!list_empty(&queue->poll_list)) {
|
while (!list_empty(&queue->poll_list)) {
|
struct net_device *dev;
|
struct net_device *dev;
|
|
|
if (budget <= 0 || jiffies - start_time > 1)
|
if (budget <= 0 || jiffies - start_time > 1)
|
goto softnet_break;
|
goto softnet_break;
|
|
|
local_irq_enable();
|
local_irq_enable();
|
|
|
dev = list_entry(queue->poll_list.next, struct net_device, poll_list);
|
dev = list_entry(queue->poll_list.next, struct net_device, poll_list);
|
|
|
if (dev->quota <= 0 || dev->poll(dev, &budget)) {
|
if (dev->quota <= 0 || dev->poll(dev, &budget)) {
|
local_irq_disable();
|
local_irq_disable();
|
list_del(&dev->poll_list);
|
list_del(&dev->poll_list);
|
list_add_tail(&dev->poll_list, &queue->poll_list);
|
list_add_tail(&dev->poll_list, &queue->poll_list);
|
if (dev->quota < 0)
|
if (dev->quota < 0)
|
dev->quota += dev->weight;
|
dev->quota += dev->weight;
|
else
|
else
|
dev->quota = dev->weight;
|
dev->quota = dev->weight;
|
} else {
|
} else {
|
dev_put(dev);
|
dev_put(dev);
|
local_irq_disable();
|
local_irq_disable();
|
}
|
}
|
}
|
}
|
|
|
local_irq_enable();
|
local_irq_enable();
|
br_read_unlock(BR_NETPROTO_LOCK);
|
br_read_unlock(BR_NETPROTO_LOCK);
|
return;
|
return;
|
|
|
softnet_break:
|
softnet_break:
|
netdev_rx_stat[this_cpu].time_squeeze++;
|
netdev_rx_stat[this_cpu].time_squeeze++;
|
__cpu_raise_softirq(this_cpu, NET_RX_SOFTIRQ);
|
__cpu_raise_softirq(this_cpu, NET_RX_SOFTIRQ);
|
|
|
local_irq_enable();
|
local_irq_enable();
|
br_read_unlock(BR_NETPROTO_LOCK);
|
br_read_unlock(BR_NETPROTO_LOCK);
|
}
|
}
|
|
|
static gifconf_func_t * gifconf_list [NPROTO];
|
static gifconf_func_t * gifconf_list [NPROTO];
|
|
|
/**
|
/**
|
* register_gifconf - register a SIOCGIF handler
|
* register_gifconf - register a SIOCGIF handler
|
* @family: Address family
|
* @family: Address family
|
* @gifconf: Function handler
|
* @gifconf: Function handler
|
*
|
*
|
* Register protocol dependent address dumping routines. The handler
|
* Register protocol dependent address dumping routines. The handler
|
* that is passed must not be freed or reused until it has been replaced
|
* that is passed must not be freed or reused until it has been replaced
|
* by another handler.
|
* by another handler.
|
*/
|
*/
|
|
|
int register_gifconf(unsigned int family, gifconf_func_t * gifconf)
|
int register_gifconf(unsigned int family, gifconf_func_t * gifconf)
|
{
|
{
|
if (family>=NPROTO)
|
if (family>=NPROTO)
|
return -EINVAL;
|
return -EINVAL;
|
gifconf_list[family] = gifconf;
|
gifconf_list[family] = gifconf;
|
return 0;
|
return 0;
|
}
|
}
|
|
|
|
|
/*
|
/*
|
* Map an interface index to its name (SIOCGIFNAME)
|
* Map an interface index to its name (SIOCGIFNAME)
|
*/
|
*/
|
|
|
/*
|
/*
|
* We need this ioctl for efficient implementation of the
|
* We need this ioctl for efficient implementation of the
|
* if_indextoname() function required by the IPv6 API. Without
|
* if_indextoname() function required by the IPv6 API. Without
|
* it, we would have to search all the interfaces to find a
|
* it, we would have to search all the interfaces to find a
|
* match. --pb
|
* match. --pb
|
*/
|
*/
|
|
|
static int dev_ifname(struct ifreq *arg)
|
static int dev_ifname(struct ifreq *arg)
|
{
|
{
|
struct net_device *dev;
|
struct net_device *dev;
|
struct ifreq ifr;
|
struct ifreq ifr;
|
|
|
/*
|
/*
|
* Fetch the caller's info block.
|
* Fetch the caller's info block.
|
*/
|
*/
|
|
|
if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
|
if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
|
return -EFAULT;
|
return -EFAULT;
|
|
|
read_lock(&dev_base_lock);
|
read_lock(&dev_base_lock);
|
dev = __dev_get_by_index(ifr.ifr_ifindex);
|
dev = __dev_get_by_index(ifr.ifr_ifindex);
|
if (!dev) {
|
if (!dev) {
|
read_unlock(&dev_base_lock);
|
read_unlock(&dev_base_lock);
|
return -ENODEV;
|
return -ENODEV;
|
}
|
}
|
|
|
strcpy(ifr.ifr_name, dev->name);
|
strcpy(ifr.ifr_name, dev->name);
|
read_unlock(&dev_base_lock);
|
read_unlock(&dev_base_lock);
|
|
|
if (copy_to_user(arg, &ifr, sizeof(struct ifreq)))
|
if (copy_to_user(arg, &ifr, sizeof(struct ifreq)))
|
return -EFAULT;
|
return -EFAULT;
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/*
|
/*
|
* Perform a SIOCGIFCONF call. This structure will change
|
* Perform a SIOCGIFCONF call. This structure will change
|
* size eventually, and there is nothing I can do about it.
|
* size eventually, and there is nothing I can do about it.
|
* Thus we will need a 'compatibility mode'.
|
* Thus we will need a 'compatibility mode'.
|
*/
|
*/
|
|
|
static int dev_ifconf(char *arg)
|
static int dev_ifconf(char *arg)
|
{
|
{
|
struct ifconf ifc;
|
struct ifconf ifc;
|
struct net_device *dev;
|
struct net_device *dev;
|
char *pos;
|
char *pos;
|
int len;
|
int len;
|
int total;
|
int total;
|
int i;
|
int i;
|
|
|
/*
|
/*
|
* Fetch the caller's info block.
|
* Fetch the caller's info block.
|
*/
|
*/
|
|
|
if (copy_from_user(&ifc, arg, sizeof(struct ifconf)))
|
if (copy_from_user(&ifc, arg, sizeof(struct ifconf)))
|
return -EFAULT;
|
return -EFAULT;
|
|
|
pos = ifc.ifc_buf;
|
pos = ifc.ifc_buf;
|
len = ifc.ifc_len;
|
len = ifc.ifc_len;
|
|
|
/*
|
/*
|
* Loop over the interfaces, and write an info block for each.
|
* Loop over the interfaces, and write an info block for each.
|
*/
|
*/
|
|
|
total = 0;
|
total = 0;
|
for (dev = dev_base; dev != NULL; dev = dev->next) {
|
for (dev = dev_base; dev != NULL; dev = dev->next) {
|
for (i=0; i<NPROTO; i++) {
|
for (i=0; i<NPROTO; i++) {
|
if (gifconf_list[i]) {
|
if (gifconf_list[i]) {
|
int done;
|
int done;
|
if (pos==NULL) {
|
if (pos==NULL) {
|
done = gifconf_list[i](dev, NULL, 0);
|
done = gifconf_list[i](dev, NULL, 0);
|
} else {
|
} else {
|
done = gifconf_list[i](dev, pos+total, len-total);
|
done = gifconf_list[i](dev, pos+total, len-total);
|
}
|
}
|
if (done<0) {
|
if (done<0) {
|
return -EFAULT;
|
return -EFAULT;
|
}
|
}
|
total += done;
|
total += done;
|
}
|
}
|
}
|
}
|
}
|
}
|
|
|
/*
|
/*
|
* All done. Write the updated control block back to the caller.
|
* All done. Write the updated control block back to the caller.
|
*/
|
*/
|
ifc.ifc_len = total;
|
ifc.ifc_len = total;
|
|
|
if (copy_to_user(arg, &ifc, sizeof(struct ifconf)))
|
if (copy_to_user(arg, &ifc, sizeof(struct ifconf)))
|
return -EFAULT;
|
return -EFAULT;
|
|
|
/*
|
/*
|
* Both BSD and Solaris return 0 here, so we do too.
|
* Both BSD and Solaris return 0 here, so we do too.
|
*/
|
*/
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/*
|
/*
|
* This is invoked by the /proc filesystem handler to display a device
|
* This is invoked by the /proc filesystem handler to display a device
|
* in detail.
|
* in detail.
|
*/
|
*/
|
|
|
#ifdef CONFIG_PROC_FS
|
#ifdef CONFIG_PROC_FS
|
|
|
static int sprintf_stats(char *buffer, struct net_device *dev)
|
static int sprintf_stats(char *buffer, struct net_device *dev)
|
{
|
{
|
struct net_device_stats *stats = (dev->get_stats ? dev->get_stats(dev): NULL);
|
struct net_device_stats *stats = (dev->get_stats ? dev->get_stats(dev): NULL);
|
int size;
|
int size;
|
|
|
if (stats)
|
if (stats)
|
size = sprintf(buffer, "%6s:%8lu %7lu %4lu %4lu %4lu %5lu %10lu %9lu %8lu %7lu %4lu %4lu %4lu %5lu %7lu %10lu\n",
|
size = sprintf(buffer, "%6s:%8lu %7lu %4lu %4lu %4lu %5lu %10lu %9lu %8lu %7lu %4lu %4lu %4lu %5lu %7lu %10lu\n",
|
dev->name,
|
dev->name,
|
stats->rx_bytes,
|
stats->rx_bytes,
|
stats->rx_packets, stats->rx_errors,
|
stats->rx_packets, stats->rx_errors,
|
stats->rx_dropped + stats->rx_missed_errors,
|
stats->rx_dropped + stats->rx_missed_errors,
|
stats->rx_fifo_errors,
|
stats->rx_fifo_errors,
|
stats->rx_length_errors + stats->rx_over_errors
|
stats->rx_length_errors + stats->rx_over_errors
|
+ stats->rx_crc_errors + stats->rx_frame_errors,
|
+ stats->rx_crc_errors + stats->rx_frame_errors,
|
stats->rx_compressed, stats->multicast,
|
stats->rx_compressed, stats->multicast,
|
stats->tx_bytes,
|
stats->tx_bytes,
|
stats->tx_packets, stats->tx_errors, stats->tx_dropped,
|
stats->tx_packets, stats->tx_errors, stats->tx_dropped,
|
stats->tx_fifo_errors, stats->collisions,
|
stats->tx_fifo_errors, stats->collisions,
|
stats->tx_carrier_errors + stats->tx_aborted_errors
|
stats->tx_carrier_errors + stats->tx_aborted_errors
|
+ stats->tx_window_errors + stats->tx_heartbeat_errors,
|
+ stats->tx_window_errors + stats->tx_heartbeat_errors,
|
stats->tx_compressed);
|
stats->tx_compressed);
|
else
|
else
|
size = sprintf(buffer, "%6s: No statistics available.\n", dev->name);
|
size = sprintf(buffer, "%6s: No statistics available.\n", dev->name);
|
|
|
return size;
|
return size;
|
}
|
}
|
|
|
/*
|
/*
|
* Called from the PROCfs module. This now uses the new arbitrary sized /proc/net interface
|
* Called from the PROCfs module. This now uses the new arbitrary sized /proc/net interface
|
* to create /proc/net/dev
|
* to create /proc/net/dev
|
*/
|
*/
|
|
|
static int dev_get_info(char *buffer, char **start, off_t offset, int length)
|
static int dev_get_info(char *buffer, char **start, off_t offset, int length)
|
{
|
{
|
int len = 0;
|
int len = 0;
|
off_t begin = 0;
|
off_t begin = 0;
|
off_t pos = 0;
|
off_t pos = 0;
|
int size;
|
int size;
|
struct net_device *dev;
|
struct net_device *dev;
|
|
|
|
|
size = sprintf(buffer,
|
size = sprintf(buffer,
|
"Inter-| Receive | Transmit\n"
|
"Inter-| Receive | Transmit\n"
|
" face |bytes packets errs drop fifo frame compressed multicast|bytes packets errs drop fifo colls carrier compressed\n");
|
" face |bytes packets errs drop fifo frame compressed multicast|bytes packets errs drop fifo colls carrier compressed\n");
|
|
|
pos += size;
|
pos += size;
|
len += size;
|
len += size;
|
|
|
|
|
read_lock(&dev_base_lock);
|
read_lock(&dev_base_lock);
|
for (dev = dev_base; dev != NULL; dev = dev->next) {
|
for (dev = dev_base; dev != NULL; dev = dev->next) {
|
size = sprintf_stats(buffer+len, dev);
|
size = sprintf_stats(buffer+len, dev);
|
len += size;
|
len += size;
|
pos = begin + len;
|
pos = begin + len;
|
|
|
if (pos < offset) {
|
if (pos < offset) {
|
len = 0;
|
len = 0;
|
begin = pos;
|
begin = pos;
|
}
|
}
|
if (pos > offset + length)
|
if (pos > offset + length)
|
break;
|
break;
|
}
|
}
|
read_unlock(&dev_base_lock);
|
read_unlock(&dev_base_lock);
|
|
|
*start = buffer + (offset - begin); /* Start of wanted data */
|
*start = buffer + (offset - begin); /* Start of wanted data */
|
len -= (offset - begin); /* Start slop */
|
len -= (offset - begin); /* Start slop */
|
if (len > length)
|
if (len > length)
|
len = length; /* Ending slop */
|
len = length; /* Ending slop */
|
if (len < 0)
|
if (len < 0)
|
len = 0;
|
len = 0;
|
return len;
|
return len;
|
}
|
}
|
|
|
static int dev_proc_stats(char *buffer, char **start, off_t offset,
|
static int dev_proc_stats(char *buffer, char **start, off_t offset,
|
int length, int *eof, void *data)
|
int length, int *eof, void *data)
|
{
|
{
|
int i, lcpu;
|
int i, lcpu;
|
int len=0;
|
int len=0;
|
|
|
for (lcpu=0; lcpu<smp_num_cpus; lcpu++) {
|
for (lcpu=0; lcpu<smp_num_cpus; lcpu++) {
|
i = cpu_logical_map(lcpu);
|
i = cpu_logical_map(lcpu);
|
len += sprintf(buffer+len, "%08x %08x %08x %08x %08x %08x %08x %08x %08x\n",
|
len += sprintf(buffer+len, "%08x %08x %08x %08x %08x %08x %08x %08x %08x\n",
|
netdev_rx_stat[i].total,
|
netdev_rx_stat[i].total,
|
netdev_rx_stat[i].dropped,
|
netdev_rx_stat[i].dropped,
|
netdev_rx_stat[i].time_squeeze,
|
netdev_rx_stat[i].time_squeeze,
|
netdev_rx_stat[i].throttled,
|
netdev_rx_stat[i].throttled,
|
netdev_rx_stat[i].fastroute_hit,
|
netdev_rx_stat[i].fastroute_hit,
|
netdev_rx_stat[i].fastroute_success,
|
netdev_rx_stat[i].fastroute_success,
|
netdev_rx_stat[i].fastroute_defer,
|
netdev_rx_stat[i].fastroute_defer,
|
netdev_rx_stat[i].fastroute_deferred_out,
|
netdev_rx_stat[i].fastroute_deferred_out,
|
#if 0
|
#if 0
|
netdev_rx_stat[i].fastroute_latency_reduction
|
netdev_rx_stat[i].fastroute_latency_reduction
|
#else
|
#else
|
netdev_rx_stat[i].cpu_collision
|
netdev_rx_stat[i].cpu_collision
|
#endif
|
#endif
|
);
|
);
|
}
|
}
|
|
|
len -= offset;
|
len -= offset;
|
|
|
if (len > length)
|
if (len > length)
|
len = length;
|
len = length;
|
if (len < 0)
|
if (len < 0)
|
len = 0;
|
len = 0;
|
|
|
*start = buffer + offset;
|
*start = buffer + offset;
|
*eof = 1;
|
*eof = 1;
|
|
|
return len;
|
return len;
|
}
|
}
|
|
|
#endif /* CONFIG_PROC_FS */
|
#endif /* CONFIG_PROC_FS */
|
|
|
|
|
/**
|
/**
|
* netdev_set_master - set up master/slave pair
|
* netdev_set_master - set up master/slave pair
|
* @slave: slave device
|
* @slave: slave device
|
* @master: new master device
|
* @master: new master device
|
*
|
*
|
* Changes the master device of the slave. Pass %NULL to break the
|
* Changes the master device of the slave. Pass %NULL to break the
|
* bonding. The caller must hold the RTNL semaphore. On a failure
|
* bonding. The caller must hold the RTNL semaphore. On a failure
|
* a negative errno code is returned. On success the reference counts
|
* a negative errno code is returned. On success the reference counts
|
* are adjusted, %RTM_NEWLINK is sent to the routing socket and the
|
* are adjusted, %RTM_NEWLINK is sent to the routing socket and the
|
* function returns zero.
|
* function returns zero.
|
*/
|
*/
|
|
|
int netdev_set_master(struct net_device *slave, struct net_device *master)
|
int netdev_set_master(struct net_device *slave, struct net_device *master)
|
{
|
{
|
struct net_device *old = slave->master;
|
struct net_device *old = slave->master;
|
|
|
ASSERT_RTNL();
|
ASSERT_RTNL();
|
|
|
if (master) {
|
if (master) {
|
if (old)
|
if (old)
|
return -EBUSY;
|
return -EBUSY;
|
dev_hold(master);
|
dev_hold(master);
|
}
|
}
|
|
|
br_write_lock_bh(BR_NETPROTO_LOCK);
|
br_write_lock_bh(BR_NETPROTO_LOCK);
|
slave->master = master;
|
slave->master = master;
|
br_write_unlock_bh(BR_NETPROTO_LOCK);
|
br_write_unlock_bh(BR_NETPROTO_LOCK);
|
|
|
if (old)
|
if (old)
|
dev_put(old);
|
dev_put(old);
|
|
|
if (master)
|
if (master)
|
slave->flags |= IFF_SLAVE;
|
slave->flags |= IFF_SLAVE;
|
else
|
else
|
slave->flags &= ~IFF_SLAVE;
|
slave->flags &= ~IFF_SLAVE;
|
|
|
rtmsg_ifinfo(RTM_NEWLINK, slave, IFF_SLAVE);
|
rtmsg_ifinfo(RTM_NEWLINK, slave, IFF_SLAVE);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/**
|
/**
|
* dev_set_promiscuity - update promiscuity count on a device
|
* dev_set_promiscuity - update promiscuity count on a device
|
* @dev: device
|
* @dev: device
|
* @inc: modifier
|
* @inc: modifier
|
*
|
*
|
* Add or remove promsicuity from a device. While the count in the device
|
* Add or remove promsicuity from a device. While the count in the device
|
* remains above zero the interface remains promiscuous. Once it hits zero
|
* remains above zero the interface remains promiscuous. Once it hits zero
|
* the device reverts back to normal filtering operation. A negative inc
|
* the device reverts back to normal filtering operation. A negative inc
|
* value is used to drop promiscuity on the device.
|
* value is used to drop promiscuity on the device.
|
*/
|
*/
|
|
|
void dev_set_promiscuity(struct net_device *dev, int inc)
|
void dev_set_promiscuity(struct net_device *dev, int inc)
|
{
|
{
|
unsigned short old_flags = dev->flags;
|
unsigned short old_flags = dev->flags;
|
|
|
dev->flags |= IFF_PROMISC;
|
dev->flags |= IFF_PROMISC;
|
if ((dev->promiscuity += inc) == 0)
|
if ((dev->promiscuity += inc) == 0)
|
dev->flags &= ~IFF_PROMISC;
|
dev->flags &= ~IFF_PROMISC;
|
if (dev->flags^old_flags) {
|
if (dev->flags^old_flags) {
|
#ifdef CONFIG_NET_FASTROUTE
|
#ifdef CONFIG_NET_FASTROUTE
|
if (dev->flags&IFF_PROMISC) {
|
if (dev->flags&IFF_PROMISC) {
|
netdev_fastroute_obstacles++;
|
netdev_fastroute_obstacles++;
|
dev_clear_fastroute(dev);
|
dev_clear_fastroute(dev);
|
} else
|
} else
|
netdev_fastroute_obstacles--;
|
netdev_fastroute_obstacles--;
|
#endif
|
#endif
|
dev_mc_upload(dev);
|
dev_mc_upload(dev);
|
printk(KERN_INFO "device %s %s promiscuous mode\n",
|
printk(KERN_INFO "device %s %s promiscuous mode\n",
|
dev->name, (dev->flags&IFF_PROMISC) ? "entered" : "left");
|
dev->name, (dev->flags&IFF_PROMISC) ? "entered" : "left");
|
}
|
}
|
}
|
}
|
|
|
/**
|
/**
|
* dev_set_allmulti - update allmulti count on a device
|
* dev_set_allmulti - update allmulti count on a device
|
* @dev: device
|
* @dev: device
|
* @inc: modifier
|
* @inc: modifier
|
*
|
*
|
* Add or remove reception of all multicast frames to a device. While the
|
* Add or remove reception of all multicast frames to a device. While the
|
* count in the device remains above zero the interface remains listening
|
* count in the device remains above zero the interface remains listening
|
* to all interfaces. Once it hits zero the device reverts back to normal
|
* to all interfaces. Once it hits zero the device reverts back to normal
|
* filtering operation. A negative @inc value is used to drop the counter
|
* filtering operation. A negative @inc value is used to drop the counter
|
* when releasing a resource needing all multicasts.
|
* when releasing a resource needing all multicasts.
|
*/
|
*/
|
|
|
void dev_set_allmulti(struct net_device *dev, int inc)
|
void dev_set_allmulti(struct net_device *dev, int inc)
|
{
|
{
|
unsigned short old_flags = dev->flags;
|
unsigned short old_flags = dev->flags;
|
|
|
dev->flags |= IFF_ALLMULTI;
|
dev->flags |= IFF_ALLMULTI;
|
if ((dev->allmulti += inc) == 0)
|
if ((dev->allmulti += inc) == 0)
|
dev->flags &= ~IFF_ALLMULTI;
|
dev->flags &= ~IFF_ALLMULTI;
|
if (dev->flags^old_flags)
|
if (dev->flags^old_flags)
|
dev_mc_upload(dev);
|
dev_mc_upload(dev);
|
}
|
}
|
|
|
int dev_change_flags(struct net_device *dev, unsigned flags)
|
int dev_change_flags(struct net_device *dev, unsigned flags)
|
{
|
{
|
int ret;
|
int ret;
|
int old_flags = dev->flags;
|
int old_flags = dev->flags;
|
|
|
/*
|
/*
|
* Set the flags on our device.
|
* Set the flags on our device.
|
*/
|
*/
|
|
|
dev->flags = (flags & (IFF_DEBUG|IFF_NOTRAILERS|IFF_NOARP|IFF_DYNAMIC|
|
dev->flags = (flags & (IFF_DEBUG|IFF_NOTRAILERS|IFF_NOARP|IFF_DYNAMIC|
|
IFF_MULTICAST|IFF_PORTSEL|IFF_AUTOMEDIA)) |
|
IFF_MULTICAST|IFF_PORTSEL|IFF_AUTOMEDIA)) |
|
(dev->flags & (IFF_UP|IFF_VOLATILE|IFF_PROMISC|IFF_ALLMULTI));
|
(dev->flags & (IFF_UP|IFF_VOLATILE|IFF_PROMISC|IFF_ALLMULTI));
|
|
|
/*
|
/*
|
* Load in the correct multicast list now the flags have changed.
|
* Load in the correct multicast list now the flags have changed.
|
*/
|
*/
|
|
|
dev_mc_upload(dev);
|
dev_mc_upload(dev);
|
|
|
/*
|
/*
|
* Have we downed the interface. We handle IFF_UP ourselves
|
* Have we downed the interface. We handle IFF_UP ourselves
|
* according to user attempts to set it, rather than blindly
|
* according to user attempts to set it, rather than blindly
|
* setting it.
|
* setting it.
|
*/
|
*/
|
|
|
ret = 0;
|
ret = 0;
|
if ((old_flags^flags)&IFF_UP) /* Bit is different ? */
|
if ((old_flags^flags)&IFF_UP) /* Bit is different ? */
|
{
|
{
|
ret = ((old_flags & IFF_UP) ? dev_close : dev_open)(dev);
|
ret = ((old_flags & IFF_UP) ? dev_close : dev_open)(dev);
|
|
|
if (ret == 0)
|
if (ret == 0)
|
dev_mc_upload(dev);
|
dev_mc_upload(dev);
|
}
|
}
|
|
|
if (dev->flags&IFF_UP &&
|
if (dev->flags&IFF_UP &&
|
((old_flags^dev->flags)&~(IFF_UP|IFF_PROMISC|IFF_ALLMULTI|IFF_VOLATILE)))
|
((old_flags^dev->flags)&~(IFF_UP|IFF_PROMISC|IFF_ALLMULTI|IFF_VOLATILE)))
|
notifier_call_chain(&netdev_chain, NETDEV_CHANGE, dev);
|
notifier_call_chain(&netdev_chain, NETDEV_CHANGE, dev);
|
|
|
if ((flags^dev->gflags)&IFF_PROMISC) {
|
if ((flags^dev->gflags)&IFF_PROMISC) {
|
int inc = (flags&IFF_PROMISC) ? +1 : -1;
|
int inc = (flags&IFF_PROMISC) ? +1 : -1;
|
dev->gflags ^= IFF_PROMISC;
|
dev->gflags ^= IFF_PROMISC;
|
dev_set_promiscuity(dev, inc);
|
dev_set_promiscuity(dev, inc);
|
}
|
}
|
|
|
/* NOTE: order of synchronization of IFF_PROMISC and IFF_ALLMULTI
|
/* NOTE: order of synchronization of IFF_PROMISC and IFF_ALLMULTI
|
is important. Some (broken) drivers set IFF_PROMISC, when
|
is important. Some (broken) drivers set IFF_PROMISC, when
|
IFF_ALLMULTI is requested not asking us and not reporting.
|
IFF_ALLMULTI is requested not asking us and not reporting.
|
*/
|
*/
|
if ((flags^dev->gflags)&IFF_ALLMULTI) {
|
if ((flags^dev->gflags)&IFF_ALLMULTI) {
|
int inc = (flags&IFF_ALLMULTI) ? +1 : -1;
|
int inc = (flags&IFF_ALLMULTI) ? +1 : -1;
|
dev->gflags ^= IFF_ALLMULTI;
|
dev->gflags ^= IFF_ALLMULTI;
|
dev_set_allmulti(dev, inc);
|
dev_set_allmulti(dev, inc);
|
}
|
}
|
|
|
if (old_flags^dev->flags)
|
if (old_flags^dev->flags)
|
rtmsg_ifinfo(RTM_NEWLINK, dev, old_flags^dev->flags);
|
rtmsg_ifinfo(RTM_NEWLINK, dev, old_flags^dev->flags);
|
|
|
return ret;
|
return ret;
|
}
|
}
|
|
|
/*
|
/*
|
* Perform the SIOCxIFxxx calls.
|
* Perform the SIOCxIFxxx calls.
|
*/
|
*/
|
|
|
static int dev_ifsioc(struct ifreq *ifr, unsigned int cmd)
|
static int dev_ifsioc(struct ifreq *ifr, unsigned int cmd)
|
{
|
{
|
struct net_device *dev;
|
struct net_device *dev;
|
int err;
|
int err;
|
|
|
if ((dev = __dev_get_by_name(ifr->ifr_name)) == NULL)
|
if ((dev = __dev_get_by_name(ifr->ifr_name)) == NULL)
|
return -ENODEV;
|
return -ENODEV;
|
|
|
switch(cmd)
|
switch(cmd)
|
{
|
{
|
case SIOCGIFFLAGS: /* Get interface flags */
|
case SIOCGIFFLAGS: /* Get interface flags */
|
ifr->ifr_flags = (dev->flags&~(IFF_PROMISC|IFF_ALLMULTI|IFF_RUNNING))
|
ifr->ifr_flags = (dev->flags&~(IFF_PROMISC|IFF_ALLMULTI|IFF_RUNNING))
|
|(dev->gflags&(IFF_PROMISC|IFF_ALLMULTI));
|
|(dev->gflags&(IFF_PROMISC|IFF_ALLMULTI));
|
if (netif_running(dev) && netif_carrier_ok(dev))
|
if (netif_running(dev) && netif_carrier_ok(dev))
|
ifr->ifr_flags |= IFF_RUNNING;
|
ifr->ifr_flags |= IFF_RUNNING;
|
return 0;
|
return 0;
|
|
|
case SIOCSIFFLAGS: /* Set interface flags */
|
case SIOCSIFFLAGS: /* Set interface flags */
|
return dev_change_flags(dev, ifr->ifr_flags);
|
return dev_change_flags(dev, ifr->ifr_flags);
|
|
|
case SIOCGIFMETRIC: /* Get the metric on the interface (currently unused) */
|
case SIOCGIFMETRIC: /* Get the metric on the interface (currently unused) */
|
ifr->ifr_metric = 0;
|
ifr->ifr_metric = 0;
|
return 0;
|
return 0;
|
|
|
case SIOCSIFMETRIC: /* Set the metric on the interface (currently unused) */
|
case SIOCSIFMETRIC: /* Set the metric on the interface (currently unused) */
|
return -EOPNOTSUPP;
|
return -EOPNOTSUPP;
|
|
|
case SIOCGIFMTU: /* Get the MTU of a device */
|
case SIOCGIFMTU: /* Get the MTU of a device */
|
ifr->ifr_mtu = dev->mtu;
|
ifr->ifr_mtu = dev->mtu;
|
return 0;
|
return 0;
|
|
|
case SIOCSIFMTU: /* Set the MTU of a device */
|
case SIOCSIFMTU: /* Set the MTU of a device */
|
if (ifr->ifr_mtu == dev->mtu)
|
if (ifr->ifr_mtu == dev->mtu)
|
return 0;
|
return 0;
|
|
|
/*
|
/*
|
* MTU must be positive.
|
* MTU must be positive.
|
*/
|
*/
|
|
|
if (ifr->ifr_mtu<0)
|
if (ifr->ifr_mtu<0)
|
return -EINVAL;
|
return -EINVAL;
|
|
|
if (!netif_device_present(dev))
|
if (!netif_device_present(dev))
|
return -ENODEV;
|
return -ENODEV;
|
|
|
if (dev->change_mtu)
|
if (dev->change_mtu)
|
err = dev->change_mtu(dev, ifr->ifr_mtu);
|
err = dev->change_mtu(dev, ifr->ifr_mtu);
|
else {
|
else {
|
dev->mtu = ifr->ifr_mtu;
|
dev->mtu = ifr->ifr_mtu;
|
err = 0;
|
err = 0;
|
}
|
}
|
if (!err && dev->flags&IFF_UP)
|
if (!err && dev->flags&IFF_UP)
|
notifier_call_chain(&netdev_chain, NETDEV_CHANGEMTU, dev);
|
notifier_call_chain(&netdev_chain, NETDEV_CHANGEMTU, dev);
|
return err;
|
return err;
|
|
|
case SIOCGIFHWADDR:
|
case SIOCGIFHWADDR:
|
memcpy(ifr->ifr_hwaddr.sa_data,dev->dev_addr, MAX_ADDR_LEN);
|
memcpy(ifr->ifr_hwaddr.sa_data,dev->dev_addr, MAX_ADDR_LEN);
|
ifr->ifr_hwaddr.sa_family=dev->type;
|
ifr->ifr_hwaddr.sa_family=dev->type;
|
return 0;
|
return 0;
|
|
|
case SIOCSIFHWADDR:
|
case SIOCSIFHWADDR:
|
if (dev->set_mac_address == NULL)
|
if (dev->set_mac_address == NULL)
|
return -EOPNOTSUPP;
|
return -EOPNOTSUPP;
|
if (ifr->ifr_hwaddr.sa_family!=dev->type)
|
if (ifr->ifr_hwaddr.sa_family!=dev->type)
|
return -EINVAL;
|
return -EINVAL;
|
if (!netif_device_present(dev))
|
if (!netif_device_present(dev))
|
return -ENODEV;
|
return -ENODEV;
|
err = dev->set_mac_address(dev, &ifr->ifr_hwaddr);
|
err = dev->set_mac_address(dev, &ifr->ifr_hwaddr);
|
if (!err)
|
if (!err)
|
notifier_call_chain(&netdev_chain, NETDEV_CHANGEADDR, dev);
|
notifier_call_chain(&netdev_chain, NETDEV_CHANGEADDR, dev);
|
return err;
|
return err;
|
|
|
case SIOCSIFHWBROADCAST:
|
case SIOCSIFHWBROADCAST:
|
if (ifr->ifr_hwaddr.sa_family!=dev->type)
|
if (ifr->ifr_hwaddr.sa_family!=dev->type)
|
return -EINVAL;
|
return -EINVAL;
|
memcpy(dev->broadcast, ifr->ifr_hwaddr.sa_data, MAX_ADDR_LEN);
|
memcpy(dev->broadcast, ifr->ifr_hwaddr.sa_data, MAX_ADDR_LEN);
|
notifier_call_chain(&netdev_chain, NETDEV_CHANGEADDR, dev);
|
notifier_call_chain(&netdev_chain, NETDEV_CHANGEADDR, dev);
|
return 0;
|
return 0;
|
|
|
case SIOCGIFMAP:
|
case SIOCGIFMAP:
|
ifr->ifr_map.mem_start=dev->mem_start;
|
ifr->ifr_map.mem_start=dev->mem_start;
|
ifr->ifr_map.mem_end=dev->mem_end;
|
ifr->ifr_map.mem_end=dev->mem_end;
|
ifr->ifr_map.base_addr=dev->base_addr;
|
ifr->ifr_map.base_addr=dev->base_addr;
|
ifr->ifr_map.irq=dev->irq;
|
ifr->ifr_map.irq=dev->irq;
|
ifr->ifr_map.dma=dev->dma;
|
ifr->ifr_map.dma=dev->dma;
|
ifr->ifr_map.port=dev->if_port;
|
ifr->ifr_map.port=dev->if_port;
|
return 0;
|
return 0;
|
|
|
case SIOCSIFMAP:
|
case SIOCSIFMAP:
|
if (dev->set_config) {
|
if (dev->set_config) {
|
if (!netif_device_present(dev))
|
if (!netif_device_present(dev))
|
return -ENODEV;
|
return -ENODEV;
|
return dev->set_config(dev,&ifr->ifr_map);
|
return dev->set_config(dev,&ifr->ifr_map);
|
}
|
}
|
return -EOPNOTSUPP;
|
return -EOPNOTSUPP;
|
|
|
case SIOCADDMULTI:
|
case SIOCADDMULTI:
|
if (dev->set_multicast_list == NULL ||
|
if (dev->set_multicast_list == NULL ||
|
ifr->ifr_hwaddr.sa_family != AF_UNSPEC)
|
ifr->ifr_hwaddr.sa_family != AF_UNSPEC)
|
return -EINVAL;
|
return -EINVAL;
|
if (!netif_device_present(dev))
|
if (!netif_device_present(dev))
|
return -ENODEV;
|
return -ENODEV;
|
dev_mc_add(dev,ifr->ifr_hwaddr.sa_data, dev->addr_len, 1);
|
dev_mc_add(dev,ifr->ifr_hwaddr.sa_data, dev->addr_len, 1);
|
return 0;
|
return 0;
|
|
|
case SIOCDELMULTI:
|
case SIOCDELMULTI:
|
if (dev->set_multicast_list == NULL ||
|
if (dev->set_multicast_list == NULL ||
|
ifr->ifr_hwaddr.sa_family!=AF_UNSPEC)
|
ifr->ifr_hwaddr.sa_family!=AF_UNSPEC)
|
return -EINVAL;
|
return -EINVAL;
|
if (!netif_device_present(dev))
|
if (!netif_device_present(dev))
|
return -ENODEV;
|
return -ENODEV;
|
dev_mc_delete(dev,ifr->ifr_hwaddr.sa_data,dev->addr_len, 1);
|
dev_mc_delete(dev,ifr->ifr_hwaddr.sa_data,dev->addr_len, 1);
|
return 0;
|
return 0;
|
|
|
case SIOCGIFINDEX:
|
case SIOCGIFINDEX:
|
ifr->ifr_ifindex = dev->ifindex;
|
ifr->ifr_ifindex = dev->ifindex;
|
return 0;
|
return 0;
|
|
|
case SIOCGIFTXQLEN:
|
case SIOCGIFTXQLEN:
|
ifr->ifr_qlen = dev->tx_queue_len;
|
ifr->ifr_qlen = dev->tx_queue_len;
|
return 0;
|
return 0;
|
|
|
case SIOCSIFTXQLEN:
|
case SIOCSIFTXQLEN:
|
if (ifr->ifr_qlen<0)
|
if (ifr->ifr_qlen<0)
|
return -EINVAL;
|
return -EINVAL;
|
dev->tx_queue_len = ifr->ifr_qlen;
|
dev->tx_queue_len = ifr->ifr_qlen;
|
return 0;
|
return 0;
|
|
|
case SIOCSIFNAME:
|
case SIOCSIFNAME:
|
if (dev->flags&IFF_UP)
|
if (dev->flags&IFF_UP)
|
return -EBUSY;
|
return -EBUSY;
|
if (__dev_get_by_name(ifr->ifr_newname))
|
if (__dev_get_by_name(ifr->ifr_newname))
|
return -EEXIST;
|
return -EEXIST;
|
memcpy(dev->name, ifr->ifr_newname, IFNAMSIZ);
|
memcpy(dev->name, ifr->ifr_newname, IFNAMSIZ);
|
dev->name[IFNAMSIZ-1] = 0;
|
dev->name[IFNAMSIZ-1] = 0;
|
notifier_call_chain(&netdev_chain, NETDEV_CHANGENAME, dev);
|
notifier_call_chain(&netdev_chain, NETDEV_CHANGENAME, dev);
|
return 0;
|
return 0;
|
|
|
/*
|
/*
|
* Unknown or private ioctl
|
* Unknown or private ioctl
|
*/
|
*/
|
|
|
default:
|
default:
|
if ((cmd >= SIOCDEVPRIVATE &&
|
if ((cmd >= SIOCDEVPRIVATE &&
|
cmd <= SIOCDEVPRIVATE + 15) ||
|
cmd <= SIOCDEVPRIVATE + 15) ||
|
cmd == SIOCBONDENSLAVE ||
|
cmd == SIOCBONDENSLAVE ||
|
cmd == SIOCBONDRELEASE ||
|
cmd == SIOCBONDRELEASE ||
|
cmd == SIOCBONDSETHWADDR ||
|
cmd == SIOCBONDSETHWADDR ||
|
cmd == SIOCBONDSLAVEINFOQUERY ||
|
cmd == SIOCBONDSLAVEINFOQUERY ||
|
cmd == SIOCBONDINFOQUERY ||
|
cmd == SIOCBONDINFOQUERY ||
|
cmd == SIOCBONDCHANGEACTIVE ||
|
cmd == SIOCBONDCHANGEACTIVE ||
|
cmd == SIOCGMIIPHY ||
|
cmd == SIOCGMIIPHY ||
|
cmd == SIOCGMIIREG ||
|
cmd == SIOCGMIIREG ||
|
cmd == SIOCSMIIREG ||
|
cmd == SIOCSMIIREG ||
|
cmd == SIOCWANDEV) {
|
cmd == SIOCWANDEV) {
|
if (dev->do_ioctl) {
|
if (dev->do_ioctl) {
|
if (!netif_device_present(dev))
|
if (!netif_device_present(dev))
|
return -ENODEV;
|
return -ENODEV;
|
return dev->do_ioctl(dev, ifr, cmd);
|
return dev->do_ioctl(dev, ifr, cmd);
|
}
|
}
|
return -EOPNOTSUPP;
|
return -EOPNOTSUPP;
|
}
|
}
|
|
|
}
|
}
|
return -EINVAL;
|
return -EINVAL;
|
}
|
}
|
|
|
/*
|
/*
|
* This function handles all "interface"-type I/O control requests. The actual
|
* This function handles all "interface"-type I/O control requests. The actual
|
* 'doing' part of this is dev_ifsioc above.
|
* 'doing' part of this is dev_ifsioc above.
|
*/
|
*/
|
|
|
/**
|
/**
|
* dev_ioctl - network device ioctl
|
* dev_ioctl - network device ioctl
|
* @cmd: command to issue
|
* @cmd: command to issue
|
* @arg: pointer to a struct ifreq in user space
|
* @arg: pointer to a struct ifreq in user space
|
*
|
*
|
* Issue ioctl functions to devices. This is normally called by the
|
* Issue ioctl functions to devices. This is normally called by the
|
* user space syscall interfaces but can sometimes be useful for
|
* user space syscall interfaces but can sometimes be useful for
|
* other purposes. The return value is the return from the syscall if
|
* other purposes. The return value is the return from the syscall if
|
* positive or a negative errno code on error.
|
* positive or a negative errno code on error.
|
*/
|
*/
|
|
|
int dev_ioctl(unsigned int cmd, void *arg)
|
int dev_ioctl(unsigned int cmd, void *arg)
|
{
|
{
|
struct ifreq ifr;
|
struct ifreq ifr;
|
int ret;
|
int ret;
|
char *colon;
|
char *colon;
|
|
|
/* One special case: SIOCGIFCONF takes ifconf argument
|
/* One special case: SIOCGIFCONF takes ifconf argument
|
and requires shared lock, because it sleeps writing
|
and requires shared lock, because it sleeps writing
|
to user space.
|
to user space.
|
*/
|
*/
|
|
|
if (cmd == SIOCGIFCONF) {
|
if (cmd == SIOCGIFCONF) {
|
rtnl_shlock();
|
rtnl_shlock();
|
ret = dev_ifconf((char *) arg);
|
ret = dev_ifconf((char *) arg);
|
rtnl_shunlock();
|
rtnl_shunlock();
|
return ret;
|
return ret;
|
}
|
}
|
if (cmd == SIOCGIFNAME) {
|
if (cmd == SIOCGIFNAME) {
|
return dev_ifname((struct ifreq *)arg);
|
return dev_ifname((struct ifreq *)arg);
|
}
|
}
|
|
|
if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
|
if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
|
return -EFAULT;
|
return -EFAULT;
|
|
|
ifr.ifr_name[IFNAMSIZ-1] = 0;
|
ifr.ifr_name[IFNAMSIZ-1] = 0;
|
|
|
colon = strchr(ifr.ifr_name, ':');
|
colon = strchr(ifr.ifr_name, ':');
|
if (colon)
|
if (colon)
|
*colon = 0;
|
*colon = 0;
|
|
|
/*
|
/*
|
* See which interface the caller is talking about.
|
* See which interface the caller is talking about.
|
*/
|
*/
|
|
|
switch(cmd)
|
switch(cmd)
|
{
|
{
|
/*
|
/*
|
* These ioctl calls:
|
* These ioctl calls:
|
* - can be done by all.
|
* - can be done by all.
|
* - atomic and do not require locking.
|
* - atomic and do not require locking.
|
* - return a value
|
* - return a value
|
*/
|
*/
|
|
|
case SIOCGIFFLAGS:
|
case SIOCGIFFLAGS:
|
case SIOCGIFMETRIC:
|
case SIOCGIFMETRIC:
|
case SIOCGIFMTU:
|
case SIOCGIFMTU:
|
case SIOCGIFHWADDR:
|
case SIOCGIFHWADDR:
|
case SIOCGIFSLAVE:
|
case SIOCGIFSLAVE:
|
case SIOCGIFMAP:
|
case SIOCGIFMAP:
|
case SIOCGIFINDEX:
|
case SIOCGIFINDEX:
|
case SIOCGIFTXQLEN:
|
case SIOCGIFTXQLEN:
|
dev_load(ifr.ifr_name);
|
dev_load(ifr.ifr_name);
|
read_lock(&dev_base_lock);
|
read_lock(&dev_base_lock);
|
ret = dev_ifsioc(&ifr, cmd);
|
ret = dev_ifsioc(&ifr, cmd);
|
read_unlock(&dev_base_lock);
|
read_unlock(&dev_base_lock);
|
if (!ret) {
|
if (!ret) {
|
if (colon)
|
if (colon)
|
*colon = ':';
|
*colon = ':';
|
if (copy_to_user(arg, &ifr, sizeof(struct ifreq)))
|
if (copy_to_user(arg, &ifr, sizeof(struct ifreq)))
|
return -EFAULT;
|
return -EFAULT;
|
}
|
}
|
return ret;
|
return ret;
|
|
|
case SIOCETHTOOL:
|
case SIOCETHTOOL:
|
dev_load(ifr.ifr_name);
|
dev_load(ifr.ifr_name);
|
rtnl_lock();
|
rtnl_lock();
|
ret = dev_ethtool(&ifr);
|
ret = dev_ethtool(&ifr);
|
rtnl_unlock();
|
rtnl_unlock();
|
if (!ret) {
|
if (!ret) {
|
if (colon)
|
if (colon)
|
*colon = ':';
|
*colon = ':';
|
if (copy_to_user(arg, &ifr,
|
if (copy_to_user(arg, &ifr,
|
sizeof(struct ifreq)))
|
sizeof(struct ifreq)))
|
ret = -EFAULT;
|
ret = -EFAULT;
|
}
|
}
|
return ret;
|
return ret;
|
|
|
/*
|
/*
|
* These ioctl calls:
|
* These ioctl calls:
|
* - require superuser power.
|
* - require superuser power.
|
* - require strict serialization.
|
* - require strict serialization.
|
* - return a value
|
* - return a value
|
*/
|
*/
|
|
|
case SIOCGMIIPHY:
|
case SIOCGMIIPHY:
|
case SIOCGMIIREG:
|
case SIOCGMIIREG:
|
if (!capable(CAP_NET_ADMIN))
|
if (!capable(CAP_NET_ADMIN))
|
return -EPERM;
|
return -EPERM;
|
dev_load(ifr.ifr_name);
|
dev_load(ifr.ifr_name);
|
dev_probe_lock();
|
dev_probe_lock();
|
rtnl_lock();
|
rtnl_lock();
|
ret = dev_ifsioc(&ifr, cmd);
|
ret = dev_ifsioc(&ifr, cmd);
|
rtnl_unlock();
|
rtnl_unlock();
|
dev_probe_unlock();
|
dev_probe_unlock();
|
if (!ret) {
|
if (!ret) {
|
if (colon)
|
if (colon)
|
*colon = ':';
|
*colon = ':';
|
if (copy_to_user(arg, &ifr, sizeof(struct ifreq)))
|
if (copy_to_user(arg, &ifr, sizeof(struct ifreq)))
|
return -EFAULT;
|
return -EFAULT;
|
}
|
}
|
return ret;
|
return ret;
|
|
|
/*
|
/*
|
* These ioctl calls:
|
* These ioctl calls:
|
* - require superuser power.
|
* - require superuser power.
|
* - require strict serialization.
|
* - require strict serialization.
|
* - do not return a value
|
* - do not return a value
|
*/
|
*/
|
|
|
case SIOCSIFFLAGS:
|
case SIOCSIFFLAGS:
|
case SIOCSIFMETRIC:
|
case SIOCSIFMETRIC:
|
case SIOCSIFMTU:
|
case SIOCSIFMTU:
|
case SIOCSIFMAP:
|
case SIOCSIFMAP:
|
case SIOCSIFHWADDR:
|
case SIOCSIFHWADDR:
|
case SIOCSIFSLAVE:
|
case SIOCSIFSLAVE:
|
case SIOCADDMULTI:
|
case SIOCADDMULTI:
|
case SIOCDELMULTI:
|
case SIOCDELMULTI:
|
case SIOCSIFHWBROADCAST:
|
case SIOCSIFHWBROADCAST:
|
case SIOCSIFTXQLEN:
|
case SIOCSIFTXQLEN:
|
case SIOCSIFNAME:
|
case SIOCSIFNAME:
|
case SIOCSMIIREG:
|
case SIOCSMIIREG:
|
case SIOCBONDENSLAVE:
|
case SIOCBONDENSLAVE:
|
case SIOCBONDRELEASE:
|
case SIOCBONDRELEASE:
|
case SIOCBONDSETHWADDR:
|
case SIOCBONDSETHWADDR:
|
case SIOCBONDSLAVEINFOQUERY:
|
case SIOCBONDSLAVEINFOQUERY:
|
case SIOCBONDINFOQUERY:
|
case SIOCBONDINFOQUERY:
|
case SIOCBONDCHANGEACTIVE:
|
case SIOCBONDCHANGEACTIVE:
|
if (!capable(CAP_NET_ADMIN))
|
if (!capable(CAP_NET_ADMIN))
|
return -EPERM;
|
return -EPERM;
|
dev_load(ifr.ifr_name);
|
dev_load(ifr.ifr_name);
|
dev_probe_lock();
|
dev_probe_lock();
|
rtnl_lock();
|
rtnl_lock();
|
ret = dev_ifsioc(&ifr, cmd);
|
ret = dev_ifsioc(&ifr, cmd);
|
rtnl_unlock();
|
rtnl_unlock();
|
dev_probe_unlock();
|
dev_probe_unlock();
|
return ret;
|
return ret;
|
|
|
case SIOCGIFMEM:
|
case SIOCGIFMEM:
|
/* Get the per device memory space. We can add this but currently
|
/* Get the per device memory space. We can add this but currently
|
do not support it */
|
do not support it */
|
case SIOCSIFMEM:
|
case SIOCSIFMEM:
|
/* Set the per device memory buffer space. Not applicable in our case */
|
/* Set the per device memory buffer space. Not applicable in our case */
|
case SIOCSIFLINK:
|
case SIOCSIFLINK:
|
return -EINVAL;
|
return -EINVAL;
|
|
|
/*
|
/*
|
* Unknown or private ioctl.
|
* Unknown or private ioctl.
|
*/
|
*/
|
|
|
default:
|
default:
|
if (cmd == SIOCWANDEV ||
|
if (cmd == SIOCWANDEV ||
|
(cmd >= SIOCDEVPRIVATE &&
|
(cmd >= SIOCDEVPRIVATE &&
|
cmd <= SIOCDEVPRIVATE + 15)) {
|
cmd <= SIOCDEVPRIVATE + 15)) {
|
dev_load(ifr.ifr_name);
|
dev_load(ifr.ifr_name);
|
dev_probe_lock();
|
dev_probe_lock();
|
rtnl_lock();
|
rtnl_lock();
|
ret = dev_ifsioc(&ifr, cmd);
|
ret = dev_ifsioc(&ifr, cmd);
|
rtnl_unlock();
|
rtnl_unlock();
|
dev_probe_unlock();
|
dev_probe_unlock();
|
if (!ret && copy_to_user(arg, &ifr, sizeof(struct ifreq)))
|
if (!ret && copy_to_user(arg, &ifr, sizeof(struct ifreq)))
|
return -EFAULT;
|
return -EFAULT;
|
return ret;
|
return ret;
|
}
|
}
|
#ifdef WIRELESS_EXT
|
#ifdef WIRELESS_EXT
|
/* Take care of Wireless Extensions */
|
/* Take care of Wireless Extensions */
|
if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) {
|
if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) {
|
/* If command is `set a parameter', or
|
/* If command is `set a parameter', or
|
* `get the encoding parameters', check if
|
* `get the encoding parameters', check if
|
* the user has the right to do it */
|
* the user has the right to do it */
|
if (IW_IS_SET(cmd) || (cmd == SIOCGIWENCODE)) {
|
if (IW_IS_SET(cmd) || (cmd == SIOCGIWENCODE)) {
|
if(!capable(CAP_NET_ADMIN))
|
if(!capable(CAP_NET_ADMIN))
|
return -EPERM;
|
return -EPERM;
|
}
|
}
|
dev_load(ifr.ifr_name);
|
dev_load(ifr.ifr_name);
|
rtnl_lock();
|
rtnl_lock();
|
/* Follow me in net/core/wireless.c */
|
/* Follow me in net/core/wireless.c */
|
ret = wireless_process_ioctl(&ifr, cmd);
|
ret = wireless_process_ioctl(&ifr, cmd);
|
rtnl_unlock();
|
rtnl_unlock();
|
if (!ret && IW_IS_GET(cmd) &&
|
if (!ret && IW_IS_GET(cmd) &&
|
copy_to_user(arg, &ifr, sizeof(struct ifreq)))
|
copy_to_user(arg, &ifr, sizeof(struct ifreq)))
|
return -EFAULT;
|
return -EFAULT;
|
return ret;
|
return ret;
|
}
|
}
|
#endif /* WIRELESS_EXT */
|
#endif /* WIRELESS_EXT */
|
return -EINVAL;
|
return -EINVAL;
|
}
|
}
|
}
|
}
|
|
|
|
|
/**
|
/**
|
* dev_new_index - allocate an ifindex
|
* dev_new_index - allocate an ifindex
|
*
|
*
|
* Returns a suitable unique value for a new device interface
|
* Returns a suitable unique value for a new device interface
|
* number. The caller must hold the rtnl semaphore or the
|
* number. The caller must hold the rtnl semaphore or the
|
* dev_base_lock to be sure it remains unique.
|
* dev_base_lock to be sure it remains unique.
|
*/
|
*/
|
|
|
int dev_new_index(void)
|
int dev_new_index(void)
|
{
|
{
|
static int ifindex;
|
static int ifindex;
|
for (;;) {
|
for (;;) {
|
if (++ifindex <= 0)
|
if (++ifindex <= 0)
|
ifindex=1;
|
ifindex=1;
|
if (__dev_get_by_index(ifindex) == NULL)
|
if (__dev_get_by_index(ifindex) == NULL)
|
return ifindex;
|
return ifindex;
|
}
|
}
|
}
|
}
|
|
|
static int dev_boot_phase = 1;
|
static int dev_boot_phase = 1;
|
|
|
/**
|
/**
|
* register_netdevice - register a network device
|
* register_netdevice - register a network device
|
* @dev: device to register
|
* @dev: device to register
|
*
|
*
|
* Take a completed network device structure and add it to the kernel
|
* Take a completed network device structure and add it to the kernel
|
* interfaces. A %NETDEV_REGISTER message is sent to the netdev notifier
|
* interfaces. A %NETDEV_REGISTER message is sent to the netdev notifier
|
* chain. 0 is returned on success. A negative errno code is returned
|
* chain. 0 is returned on success. A negative errno code is returned
|
* on a failure to set up the device, or if the name is a duplicate.
|
* on a failure to set up the device, or if the name is a duplicate.
|
*
|
*
|
* Callers must hold the rtnl semaphore. See the comment at the
|
* Callers must hold the rtnl semaphore. See the comment at the
|
* end of Space.c for details about the locking. You may want
|
* end of Space.c for details about the locking. You may want
|
* register_netdev() instead of this.
|
* register_netdev() instead of this.
|
*
|
*
|
* BUGS:
|
* BUGS:
|
* The locking appears insufficient to guarantee two parallel registers
|
* The locking appears insufficient to guarantee two parallel registers
|
* will not get the same name.
|
* will not get the same name.
|
*/
|
*/
|
|
|
int net_dev_init(void);
|
int net_dev_init(void);
|
|
|
int register_netdevice(struct net_device *dev)
|
int register_netdevice(struct net_device *dev)
|
{
|
{
|
struct net_device *d, **dp;
|
struct net_device *d, **dp;
|
#ifdef CONFIG_NET_DIVERT
|
#ifdef CONFIG_NET_DIVERT
|
int ret;
|
int ret;
|
#endif
|
#endif
|
|
|
spin_lock_init(&dev->queue_lock);
|
spin_lock_init(&dev->queue_lock);
|
spin_lock_init(&dev->xmit_lock);
|
spin_lock_init(&dev->xmit_lock);
|
dev->xmit_lock_owner = -1;
|
dev->xmit_lock_owner = -1;
|
#ifdef CONFIG_NET_FASTROUTE
|
#ifdef CONFIG_NET_FASTROUTE
|
dev->fastpath_lock=RW_LOCK_UNLOCKED;
|
dev->fastpath_lock=RW_LOCK_UNLOCKED;
|
#endif
|
#endif
|
|
|
if (dev_boot_phase)
|
if (dev_boot_phase)
|
net_dev_init();
|
net_dev_init();
|
|
|
#ifdef CONFIG_NET_DIVERT
|
#ifdef CONFIG_NET_DIVERT
|
ret = alloc_divert_blk(dev);
|
ret = alloc_divert_blk(dev);
|
if (ret)
|
if (ret)
|
return ret;
|
return ret;
|
#endif /* CONFIG_NET_DIVERT */
|
#endif /* CONFIG_NET_DIVERT */
|
|
|
dev->iflink = -1;
|
dev->iflink = -1;
|
|
|
/* Init, if this function is available */
|
/* Init, if this function is available */
|
if (dev->init && dev->init(dev) != 0) {
|
if (dev->init && dev->init(dev) != 0) {
|
#ifdef CONFIG_NET_DIVERT
|
#ifdef CONFIG_NET_DIVERT
|
free_divert_blk(dev);
|
free_divert_blk(dev);
|
#endif
|
#endif
|
return -EIO;
|
return -EIO;
|
}
|
}
|
|
|
dev->ifindex = dev_new_index();
|
dev->ifindex = dev_new_index();
|
if (dev->iflink == -1)
|
if (dev->iflink == -1)
|
dev->iflink = dev->ifindex;
|
dev->iflink = dev->ifindex;
|
|
|
/* Check for existence, and append to tail of chain */
|
/* Check for existence, and append to tail of chain */
|
for (dp=&dev_base; (d=*dp) != NULL; dp=&d->next) {
|
for (dp=&dev_base; (d=*dp) != NULL; dp=&d->next) {
|
if (d == dev || strcmp(d->name, dev->name) == 0) {
|
if (d == dev || strcmp(d->name, dev->name) == 0) {
|
#ifdef CONFIG_NET_DIVERT
|
#ifdef CONFIG_NET_DIVERT
|
free_divert_blk(dev);
|
free_divert_blk(dev);
|
#endif
|
#endif
|
return -EEXIST;
|
return -EEXIST;
|
}
|
}
|
}
|
}
|
|
|
/* Fix illegal SG+CSUM combinations. */
|
/* Fix illegal SG+CSUM combinations. */
|
if ((dev->features & NETIF_F_SG) &&
|
if ((dev->features & NETIF_F_SG) &&
|
!(dev->features & (NETIF_F_IP_CSUM |
|
!(dev->features & (NETIF_F_IP_CSUM |
|
NETIF_F_NO_CSUM |
|
NETIF_F_NO_CSUM |
|
NETIF_F_HW_CSUM))) {
|
NETIF_F_HW_CSUM))) {
|
printk("%s: Dropping NETIF_F_SG since no checksum feature.\n",
|
printk("%s: Dropping NETIF_F_SG since no checksum feature.\n",
|
dev->name);
|
dev->name);
|
dev->features &= ~NETIF_F_SG;
|
dev->features &= ~NETIF_F_SG;
|
}
|
}
|
|
|
/*
|
/*
|
* nil rebuild_header routine,
|
* nil rebuild_header routine,
|
* that should be never called and used as just bug trap.
|
* that should be never called and used as just bug trap.
|
*/
|
*/
|
|
|
if (dev->rebuild_header == NULL)
|
if (dev->rebuild_header == NULL)
|
dev->rebuild_header = default_rebuild_header;
|
dev->rebuild_header = default_rebuild_header;
|
|
|
/*
|
/*
|
* Default initial state at registry is that the
|
* Default initial state at registry is that the
|
* device is present.
|
* device is present.
|
*/
|
*/
|
|
|
set_bit(__LINK_STATE_PRESENT, &dev->state);
|
set_bit(__LINK_STATE_PRESENT, &dev->state);
|
|
|
dev->next = NULL;
|
dev->next = NULL;
|
dev_init_scheduler(dev);
|
dev_init_scheduler(dev);
|
write_lock_bh(&dev_base_lock);
|
write_lock_bh(&dev_base_lock);
|
*dp = dev;
|
*dp = dev;
|
dev_hold(dev);
|
dev_hold(dev);
|
dev->deadbeaf = 0;
|
dev->deadbeaf = 0;
|
write_unlock_bh(&dev_base_lock);
|
write_unlock_bh(&dev_base_lock);
|
|
|
/* Notify protocols, that a new device appeared. */
|
/* Notify protocols, that a new device appeared. */
|
notifier_call_chain(&netdev_chain, NETDEV_REGISTER, dev);
|
notifier_call_chain(&netdev_chain, NETDEV_REGISTER, dev);
|
|
|
net_run_sbin_hotplug(dev, "register");
|
net_run_sbin_hotplug(dev, "register");
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/**
|
/**
|
* netdev_finish_unregister - complete unregistration
|
* netdev_finish_unregister - complete unregistration
|
* @dev: device
|
* @dev: device
|
*
|
*
|
* Destroy and free a dead device. A value of zero is returned on
|
* Destroy and free a dead device. A value of zero is returned on
|
* success.
|
* success.
|
*/
|
*/
|
|
|
int netdev_finish_unregister(struct net_device *dev)
|
int netdev_finish_unregister(struct net_device *dev)
|
{
|
{
|
BUG_TRAP(dev->ip_ptr==NULL);
|
BUG_TRAP(dev->ip_ptr==NULL);
|
BUG_TRAP(dev->ip6_ptr==NULL);
|
BUG_TRAP(dev->ip6_ptr==NULL);
|
BUG_TRAP(dev->dn_ptr==NULL);
|
BUG_TRAP(dev->dn_ptr==NULL);
|
|
|
if (!dev->deadbeaf) {
|
if (!dev->deadbeaf) {
|
printk(KERN_ERR "Freeing alive device %p, %s\n", dev, dev->name);
|
printk(KERN_ERR "Freeing alive device %p, %s\n", dev, dev->name);
|
return 0;
|
return 0;
|
}
|
}
|
#ifdef NET_REFCNT_DEBUG
|
#ifdef NET_REFCNT_DEBUG
|
printk(KERN_DEBUG "netdev_finish_unregister: %s%s.\n", dev->name,
|
printk(KERN_DEBUG "netdev_finish_unregister: %s%s.\n", dev->name,
|
(dev->features & NETIF_F_DYNALLOC)?"":", old style");
|
(dev->features & NETIF_F_DYNALLOC)?"":", old style");
|
#endif
|
#endif
|
if (dev->destructor)
|
if (dev->destructor)
|
dev->destructor(dev);
|
dev->destructor(dev);
|
if (dev->features & NETIF_F_DYNALLOC)
|
if (dev->features & NETIF_F_DYNALLOC)
|
kfree(dev);
|
kfree(dev);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/**
|
/**
|
* unregister_netdevice - remove device from the kernel
|
* unregister_netdevice - remove device from the kernel
|
* @dev: device
|
* @dev: device
|
*
|
*
|
* This function shuts down a device interface and removes it
|
* This function shuts down a device interface and removes it
|
* from the kernel tables. On success 0 is returned, on a failure
|
* from the kernel tables. On success 0 is returned, on a failure
|
* a negative errno code is returned.
|
* a negative errno code is returned.
|
*
|
*
|
* Callers must hold the rtnl semaphore. See the comment at the
|
* Callers must hold the rtnl semaphore. See the comment at the
|
* end of Space.c for details about the locking. You may want
|
* end of Space.c for details about the locking. You may want
|
* unregister_netdev() instead of this.
|
* unregister_netdev() instead of this.
|
*/
|
*/
|
|
|
int unregister_netdevice(struct net_device *dev)
|
int unregister_netdevice(struct net_device *dev)
|
{
|
{
|
unsigned long now, warning_time;
|
unsigned long now, warning_time;
|
struct net_device *d, **dp;
|
struct net_device *d, **dp;
|
|
|
/* If device is running, close it first. */
|
/* If device is running, close it first. */
|
if (dev->flags & IFF_UP)
|
if (dev->flags & IFF_UP)
|
dev_close(dev);
|
dev_close(dev);
|
|
|
BUG_TRAP(dev->deadbeaf==0);
|
BUG_TRAP(dev->deadbeaf==0);
|
dev->deadbeaf = 1;
|
dev->deadbeaf = 1;
|
|
|
/* And unlink it from device chain. */
|
/* And unlink it from device chain. */
|
for (dp = &dev_base; (d=*dp) != NULL; dp=&d->next) {
|
for (dp = &dev_base; (d=*dp) != NULL; dp=&d->next) {
|
if (d == dev) {
|
if (d == dev) {
|
write_lock_bh(&dev_base_lock);
|
write_lock_bh(&dev_base_lock);
|
*dp = d->next;
|
*dp = d->next;
|
write_unlock_bh(&dev_base_lock);
|
write_unlock_bh(&dev_base_lock);
|
break;
|
break;
|
}
|
}
|
}
|
}
|
if (d == NULL) {
|
if (d == NULL) {
|
printk(KERN_DEBUG "unregister_netdevice: device %s/%p never was registered\n", dev->name, dev);
|
printk(KERN_DEBUG "unregister_netdevice: device %s/%p never was registered\n", dev->name, dev);
|
return -ENODEV;
|
return -ENODEV;
|
}
|
}
|
|
|
/* Synchronize to net_rx_action. */
|
/* Synchronize to net_rx_action. */
|
br_write_lock_bh(BR_NETPROTO_LOCK);
|
br_write_lock_bh(BR_NETPROTO_LOCK);
|
br_write_unlock_bh(BR_NETPROTO_LOCK);
|
br_write_unlock_bh(BR_NETPROTO_LOCK);
|
|
|
if (dev_boot_phase == 0) {
|
if (dev_boot_phase == 0) {
|
#ifdef CONFIG_NET_FASTROUTE
|
#ifdef CONFIG_NET_FASTROUTE
|
dev_clear_fastroute(dev);
|
dev_clear_fastroute(dev);
|
#endif
|
#endif
|
|
|
/* Shutdown queueing discipline. */
|
/* Shutdown queueing discipline. */
|
dev_shutdown(dev);
|
dev_shutdown(dev);
|
|
|
net_run_sbin_hotplug(dev, "unregister");
|
net_run_sbin_hotplug(dev, "unregister");
|
|
|
/* Notify protocols, that we are about to destroy
|
/* Notify protocols, that we are about to destroy
|
this device. They should clean all the things.
|
this device. They should clean all the things.
|
*/
|
*/
|
notifier_call_chain(&netdev_chain, NETDEV_UNREGISTER, dev);
|
notifier_call_chain(&netdev_chain, NETDEV_UNREGISTER, dev);
|
|
|
/*
|
/*
|
* Flush the multicast chain
|
* Flush the multicast chain
|
*/
|
*/
|
dev_mc_discard(dev);
|
dev_mc_discard(dev);
|
}
|
}
|
|
|
if (dev->uninit)
|
if (dev->uninit)
|
dev->uninit(dev);
|
dev->uninit(dev);
|
|
|
/* Notifier chain MUST detach us from master device. */
|
/* Notifier chain MUST detach us from master device. */
|
BUG_TRAP(dev->master==NULL);
|
BUG_TRAP(dev->master==NULL);
|
|
|
#ifdef CONFIG_NET_DIVERT
|
#ifdef CONFIG_NET_DIVERT
|
free_divert_blk(dev);
|
free_divert_blk(dev);
|
#endif
|
#endif
|
|
|
if (dev->features & NETIF_F_DYNALLOC) {
|
if (dev->features & NETIF_F_DYNALLOC) {
|
#ifdef NET_REFCNT_DEBUG
|
#ifdef NET_REFCNT_DEBUG
|
if (atomic_read(&dev->refcnt) != 1)
|
if (atomic_read(&dev->refcnt) != 1)
|
printk(KERN_DEBUG "unregister_netdevice: holding %s refcnt=%d\n", dev->name, atomic_read(&dev->refcnt)-1);
|
printk(KERN_DEBUG "unregister_netdevice: holding %s refcnt=%d\n", dev->name, atomic_read(&dev->refcnt)-1);
|
#endif
|
#endif
|
dev_put(dev);
|
dev_put(dev);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/* Last reference is our one */
|
/* Last reference is our one */
|
if (atomic_read(&dev->refcnt) == 1) {
|
if (atomic_read(&dev->refcnt) == 1) {
|
dev_put(dev);
|
dev_put(dev);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
#ifdef NET_REFCNT_DEBUG
|
#ifdef NET_REFCNT_DEBUG
|
printk("unregister_netdevice: waiting %s refcnt=%d\n", dev->name, atomic_read(&dev->refcnt));
|
printk("unregister_netdevice: waiting %s refcnt=%d\n", dev->name, atomic_read(&dev->refcnt));
|
#endif
|
#endif
|
|
|
/* EXPLANATION. If dev->refcnt is not now 1 (our own reference)
|
/* EXPLANATION. If dev->refcnt is not now 1 (our own reference)
|
it means that someone in the kernel still has a reference
|
it means that someone in the kernel still has a reference
|
to this device and we cannot release it.
|
to this device and we cannot release it.
|
|
|
"New style" devices have destructors, hence we can return from this
|
"New style" devices have destructors, hence we can return from this
|
function and destructor will do all the work later. As of kernel 2.4.0
|
function and destructor will do all the work later. As of kernel 2.4.0
|
there are very few "New Style" devices.
|
there are very few "New Style" devices.
|
|
|
"Old style" devices expect that the device is free of any references
|
"Old style" devices expect that the device is free of any references
|
upon exit from this function.
|
upon exit from this function.
|
We cannot return from this function until all such references have
|
We cannot return from this function until all such references have
|
fallen away. This is because the caller of this function will probably
|
fallen away. This is because the caller of this function will probably
|
immediately kfree(*dev) and then be unloaded via sys_delete_module.
|
immediately kfree(*dev) and then be unloaded via sys_delete_module.
|
|
|
So, we linger until all references fall away. The duration of the
|
So, we linger until all references fall away. The duration of the
|
linger is basically unbounded! It is driven by, for example, the
|
linger is basically unbounded! It is driven by, for example, the
|
current setting of sysctl_ipfrag_time.
|
current setting of sysctl_ipfrag_time.
|
|
|
After 1 second, we start to rebroadcast unregister notifications
|
After 1 second, we start to rebroadcast unregister notifications
|
in hope that careless clients will release the device.
|
in hope that careless clients will release the device.
|
|
|
*/
|
*/
|
|
|
now = warning_time = jiffies;
|
now = warning_time = jiffies;
|
while (atomic_read(&dev->refcnt) != 1) {
|
while (atomic_read(&dev->refcnt) != 1) {
|
if ((jiffies - now) > 1*HZ) {
|
if ((jiffies - now) > 1*HZ) {
|
/* Rebroadcast unregister notification */
|
/* Rebroadcast unregister notification */
|
notifier_call_chain(&netdev_chain, NETDEV_UNREGISTER, dev);
|
notifier_call_chain(&netdev_chain, NETDEV_UNREGISTER, dev);
|
}
|
}
|
current->state = TASK_INTERRUPTIBLE;
|
current->state = TASK_INTERRUPTIBLE;
|
schedule_timeout(HZ/4);
|
schedule_timeout(HZ/4);
|
current->state = TASK_RUNNING;
|
current->state = TASK_RUNNING;
|
if ((jiffies - warning_time) > 10*HZ) {
|
if ((jiffies - warning_time) > 10*HZ) {
|
printk(KERN_EMERG "unregister_netdevice: waiting for %s to "
|
printk(KERN_EMERG "unregister_netdevice: waiting for %s to "
|
"become free. Usage count = %d\n",
|
"become free. Usage count = %d\n",
|
dev->name, atomic_read(&dev->refcnt));
|
dev->name, atomic_read(&dev->refcnt));
|
warning_time = jiffies;
|
warning_time = jiffies;
|
}
|
}
|
}
|
}
|
dev_put(dev);
|
dev_put(dev);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
|
|
/*
|
/*
|
* Initialize the DEV module. At boot time this walks the device list and
|
* Initialize the DEV module. At boot time this walks the device list and
|
* unhooks any devices that fail to initialise (normally hardware not
|
* unhooks any devices that fail to initialise (normally hardware not
|
* present) and leaves us with a valid list of present and active devices.
|
* present) and leaves us with a valid list of present and active devices.
|
*
|
*
|
*/
|
*/
|
|
|
extern void net_device_init(void);
|
extern void net_device_init(void);
|
extern void ip_auto_config(void);
|
extern void ip_auto_config(void);
|
struct proc_dir_entry *proc_net_drivers;
|
struct proc_dir_entry *proc_net_drivers;
|
#ifdef CONFIG_NET_DIVERT
|
#ifdef CONFIG_NET_DIVERT
|
extern void dv_init(void);
|
extern void dv_init(void);
|
#endif /* CONFIG_NET_DIVERT */
|
#endif /* CONFIG_NET_DIVERT */
|
|
|
|
|
/*
|
/*
|
* Callers must hold the rtnl semaphore. See the comment at the
|
* Callers must hold the rtnl semaphore. See the comment at the
|
* end of Space.c for details about the locking.
|
* end of Space.c for details about the locking.
|
*/
|
*/
|
int __init net_dev_init(void)
|
int __init net_dev_init(void)
|
{
|
{
|
struct net_device *dev, **dp;
|
struct net_device *dev, **dp;
|
int i;
|
int i;
|
|
|
if (!dev_boot_phase)
|
if (!dev_boot_phase)
|
return 0;
|
return 0;
|
|
|
|
|
#ifdef CONFIG_NET_DIVERT
|
#ifdef CONFIG_NET_DIVERT
|
dv_init();
|
dv_init();
|
#endif /* CONFIG_NET_DIVERT */
|
#endif /* CONFIG_NET_DIVERT */
|
|
|
/*
|
/*
|
* Initialise the packet receive queues.
|
* Initialise the packet receive queues.
|
*/
|
*/
|
|
|
for (i = 0; i < NR_CPUS; i++) {
|
for (i = 0; i < NR_CPUS; i++) {
|
struct softnet_data *queue;
|
struct softnet_data *queue;
|
|
|
queue = &softnet_data[i];
|
queue = &softnet_data[i];
|
skb_queue_head_init(&queue->input_pkt_queue);
|
skb_queue_head_init(&queue->input_pkt_queue);
|
queue->throttle = 0;
|
queue->throttle = 0;
|
queue->cng_level = 0;
|
queue->cng_level = 0;
|
queue->avg_blog = 10; /* arbitrary non-zero */
|
queue->avg_blog = 10; /* arbitrary non-zero */
|
queue->completion_queue = NULL;
|
queue->completion_queue = NULL;
|
INIT_LIST_HEAD(&queue->poll_list);
|
INIT_LIST_HEAD(&queue->poll_list);
|
set_bit(__LINK_STATE_START, &queue->blog_dev.state);
|
set_bit(__LINK_STATE_START, &queue->blog_dev.state);
|
queue->blog_dev.weight = weight_p;
|
queue->blog_dev.weight = weight_p;
|
queue->blog_dev.poll = process_backlog;
|
queue->blog_dev.poll = process_backlog;
|
atomic_set(&queue->blog_dev.refcnt, 1);
|
atomic_set(&queue->blog_dev.refcnt, 1);
|
}
|
}
|
|
|
#ifdef CONFIG_NET_PROFILE
|
#ifdef CONFIG_NET_PROFILE
|
net_profile_init();
|
net_profile_init();
|
NET_PROFILE_REGISTER(dev_queue_xmit);
|
NET_PROFILE_REGISTER(dev_queue_xmit);
|
NET_PROFILE_REGISTER(softnet_process);
|
NET_PROFILE_REGISTER(softnet_process);
|
#endif
|
#endif
|
|
|
#ifdef OFFLINE_SAMPLE
|
#ifdef OFFLINE_SAMPLE
|
samp_timer.expires = jiffies + (10 * HZ);
|
samp_timer.expires = jiffies + (10 * HZ);
|
add_timer(&samp_timer);
|
add_timer(&samp_timer);
|
#endif
|
#endif
|
|
|
/*
|
/*
|
* Add the devices.
|
* Add the devices.
|
* If the call to dev->init fails, the dev is removed
|
* If the call to dev->init fails, the dev is removed
|
* from the chain disconnecting the device until the
|
* from the chain disconnecting the device until the
|
* next reboot.
|
* next reboot.
|
*
|
*
|
* NB At boot phase networking is dead. No locking is required.
|
* NB At boot phase networking is dead. No locking is required.
|
* But we still preserve dev_base_lock for sanity.
|
* But we still preserve dev_base_lock for sanity.
|
*/
|
*/
|
|
|
dp = &dev_base;
|
dp = &dev_base;
|
while ((dev = *dp) != NULL) {
|
while ((dev = *dp) != NULL) {
|
spin_lock_init(&dev->queue_lock);
|
spin_lock_init(&dev->queue_lock);
|
spin_lock_init(&dev->xmit_lock);
|
spin_lock_init(&dev->xmit_lock);
|
#ifdef CONFIG_NET_FASTROUTE
|
#ifdef CONFIG_NET_FASTROUTE
|
dev->fastpath_lock = RW_LOCK_UNLOCKED;
|
dev->fastpath_lock = RW_LOCK_UNLOCKED;
|
#endif
|
#endif
|
dev->xmit_lock_owner = -1;
|
dev->xmit_lock_owner = -1;
|
dev->iflink = -1;
|
dev->iflink = -1;
|
dev_hold(dev);
|
dev_hold(dev);
|
|
|
/*
|
/*
|
* Allocate name. If the init() fails
|
* Allocate name. If the init() fails
|
* the name will be reissued correctly.
|
* the name will be reissued correctly.
|
*/
|
*/
|
if (strchr(dev->name, '%'))
|
if (strchr(dev->name, '%'))
|
dev_alloc_name(dev, dev->name);
|
dev_alloc_name(dev, dev->name);
|
|
|
/*
|
/*
|
* Check boot time settings for the device.
|
* Check boot time settings for the device.
|
*/
|
*/
|
netdev_boot_setup_check(dev);
|
netdev_boot_setup_check(dev);
|
|
|
if (dev->init && dev->init(dev)) {
|
if (dev->init && dev->init(dev)) {
|
/*
|
/*
|
* It failed to come up. It will be unhooked later.
|
* It failed to come up. It will be unhooked later.
|
* dev_alloc_name can now advance to next suitable
|
* dev_alloc_name can now advance to next suitable
|
* name that is checked next.
|
* name that is checked next.
|
*/
|
*/
|
dev->deadbeaf = 1;
|
dev->deadbeaf = 1;
|
dp = &dev->next;
|
dp = &dev->next;
|
} else {
|
} else {
|
dp = &dev->next;
|
dp = &dev->next;
|
dev->ifindex = dev_new_index();
|
dev->ifindex = dev_new_index();
|
if (dev->iflink == -1)
|
if (dev->iflink == -1)
|
dev->iflink = dev->ifindex;
|
dev->iflink = dev->ifindex;
|
if (dev->rebuild_header == NULL)
|
if (dev->rebuild_header == NULL)
|
dev->rebuild_header = default_rebuild_header;
|
dev->rebuild_header = default_rebuild_header;
|
dev_init_scheduler(dev);
|
dev_init_scheduler(dev);
|
set_bit(__LINK_STATE_PRESENT, &dev->state);
|
set_bit(__LINK_STATE_PRESENT, &dev->state);
|
}
|
}
|
}
|
}
|
|
|
/*
|
/*
|
* Unhook devices that failed to come up
|
* Unhook devices that failed to come up
|
*/
|
*/
|
dp = &dev_base;
|
dp = &dev_base;
|
while ((dev = *dp) != NULL) {
|
while ((dev = *dp) != NULL) {
|
if (dev->deadbeaf) {
|
if (dev->deadbeaf) {
|
write_lock_bh(&dev_base_lock);
|
write_lock_bh(&dev_base_lock);
|
*dp = dev->next;
|
*dp = dev->next;
|
write_unlock_bh(&dev_base_lock);
|
write_unlock_bh(&dev_base_lock);
|
dev_put(dev);
|
dev_put(dev);
|
} else {
|
} else {
|
dp = &dev->next;
|
dp = &dev->next;
|
}
|
}
|
}
|
}
|
|
|
#ifdef CONFIG_PROC_FS
|
#ifdef CONFIG_PROC_FS
|
proc_net_create("dev", 0, dev_get_info);
|
proc_net_create("dev", 0, dev_get_info);
|
create_proc_read_entry("net/softnet_stat", 0, 0, dev_proc_stats, NULL);
|
create_proc_read_entry("net/softnet_stat", 0, 0, dev_proc_stats, NULL);
|
proc_net_drivers = proc_mkdir("net/drivers", 0);
|
proc_net_drivers = proc_mkdir("net/drivers", 0);
|
#ifdef WIRELESS_EXT
|
#ifdef WIRELESS_EXT
|
/* Available in net/core/wireless.c */
|
/* Available in net/core/wireless.c */
|
proc_net_create("wireless", 0, dev_get_wireless_info);
|
proc_net_create("wireless", 0, dev_get_wireless_info);
|
#endif /* WIRELESS_EXT */
|
#endif /* WIRELESS_EXT */
|
#endif /* CONFIG_PROC_FS */
|
#endif /* CONFIG_PROC_FS */
|
|
|
dev_boot_phase = 0;
|
dev_boot_phase = 0;
|
|
|
open_softirq(NET_TX_SOFTIRQ, net_tx_action, NULL);
|
open_softirq(NET_TX_SOFTIRQ, net_tx_action, NULL);
|
open_softirq(NET_RX_SOFTIRQ, net_rx_action, NULL);
|
open_softirq(NET_RX_SOFTIRQ, net_rx_action, NULL);
|
|
|
dst_init();
|
dst_init();
|
dev_mcast_init();
|
dev_mcast_init();
|
|
|
#ifdef CONFIG_NET_SCHED
|
#ifdef CONFIG_NET_SCHED
|
pktsched_init();
|
pktsched_init();
|
#endif
|
#endif
|
/*
|
/*
|
* Initialise network devices
|
* Initialise network devices
|
*/
|
*/
|
|
|
net_device_init();
|
net_device_init();
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
#ifdef CONFIG_HOTPLUG
|
#ifdef CONFIG_HOTPLUG
|
|
|
/* Notify userspace when a netdevice event occurs,
|
/* Notify userspace when a netdevice event occurs,
|
* by running '/sbin/hotplug net' with certain
|
* by running '/sbin/hotplug net' with certain
|
* environment variables set.
|
* environment variables set.
|
*/
|
*/
|
|
|
static int net_run_sbin_hotplug(struct net_device *dev, char *action)
|
static int net_run_sbin_hotplug(struct net_device *dev, char *action)
|
{
|
{
|
char *argv[3], *envp[5], ifname[12 + IFNAMSIZ], action_str[32];
|
char *argv[3], *envp[5], ifname[12 + IFNAMSIZ], action_str[32];
|
int i;
|
int i;
|
|
|
sprintf(ifname, "INTERFACE=%s", dev->name);
|
sprintf(ifname, "INTERFACE=%s", dev->name);
|
sprintf(action_str, "ACTION=%s", action);
|
sprintf(action_str, "ACTION=%s", action);
|
|
|
i = 0;
|
i = 0;
|
argv[i++] = hotplug_path;
|
argv[i++] = hotplug_path;
|
argv[i++] = "net";
|
argv[i++] = "net";
|
argv[i] = 0;
|
argv[i] = 0;
|
|
|
i = 0;
|
i = 0;
|
/* minimal command environment */
|
/* minimal command environment */
|
envp [i++] = "HOME=/";
|
envp [i++] = "HOME=/";
|
envp [i++] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
|
envp [i++] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
|
envp [i++] = ifname;
|
envp [i++] = ifname;
|
envp [i++] = action_str;
|
envp [i++] = action_str;
|
envp [i] = 0;
|
envp [i] = 0;
|
|
|
return call_usermodehelper(argv [0], argv, envp);
|
return call_usermodehelper(argv [0], argv, envp);
|
}
|
}
|
#endif
|
#endif
|
|
|
