1510 lines
44 KiB
C
1510 lines
44 KiB
C
/*
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* INET An implementation of the TCP/IP protocol suite for the LINUX
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* operating system. INET is implemented using the BSD Socket
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* interface as the means of communication with the user level.
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*
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* Definitions for the Interfaces handler.
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*
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* Version: @(#)dev.h 1.0.10 08/12/93
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*
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* Authors: Ross Biro
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* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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* Corey Minyard <wf-rch!minyard@relay.EU.net>
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* Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>
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* Alan Cox, <Alan.Cox@linux.org>
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* Bjorn Ekwall. <bj0rn@blox.se>
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* Pekka Riikonen <priikone@poseidon.pspt.fi>
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*
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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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* 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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*
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* Moved to /usr/include/linux for NET3
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*/
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#ifndef _LINUX_NETDEVICE_H
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#define _LINUX_NETDEVICE_H
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#include <linux/if.h>
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#include <linux/if_ether.h>
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#include <linux/if_packet.h>
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#ifdef __KERNEL__
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#include <linux/timer.h>
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#include <linux/delay.h>
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#include <asm/atomic.h>
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#include <asm/cache.h>
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#include <asm/byteorder.h>
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#include <linux/device.h>
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#include <linux/percpu.h>
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#include <linux/dmaengine.h>
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#include <linux/workqueue.h>
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#include <net/net_namespace.h>
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struct vlan_group;
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struct ethtool_ops;
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struct netpoll_info;
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/* 802.11 specific */
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struct wireless_dev;
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/* source back-compat hooks */
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#define SET_ETHTOOL_OPS(netdev,ops) \
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( (netdev)->ethtool_ops = (ops) )
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#define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
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functions are available. */
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#define HAVE_FREE_NETDEV /* free_netdev() */
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#define HAVE_NETDEV_PRIV /* netdev_priv() */
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#define NET_XMIT_SUCCESS 0
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#define NET_XMIT_DROP 1 /* skb dropped */
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#define NET_XMIT_CN 2 /* congestion notification */
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#define NET_XMIT_POLICED 3 /* skb is shot by police */
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#define NET_XMIT_BYPASS 4 /* packet does not leave via dequeue;
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(TC use only - dev_queue_xmit
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returns this as NET_XMIT_SUCCESS) */
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/* Backlog congestion levels */
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#define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
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#define NET_RX_DROP 1 /* packet dropped */
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#define NET_RX_CN_LOW 2 /* storm alert, just in case */
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#define NET_RX_CN_MOD 3 /* Storm on its way! */
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#define NET_RX_CN_HIGH 4 /* The storm is here */
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#define NET_RX_BAD 5 /* packet dropped due to kernel error */
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/* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
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* indicates that the device will soon be dropping packets, or already drops
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* some packets of the same priority; prompting us to send less aggressively. */
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#define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e))
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#define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
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#endif
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#define MAX_ADDR_LEN 32 /* Largest hardware address length */
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/* Driver transmit return codes */
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#define NETDEV_TX_OK 0 /* driver took care of packet */
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#define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
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#define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
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/*
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* Compute the worst case header length according to the protocols
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* used.
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*/
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#if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR)
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#define LL_MAX_HEADER 32
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#else
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#if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
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#define LL_MAX_HEADER 96
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#else
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#define LL_MAX_HEADER 48
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#endif
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#endif
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#if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
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!defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
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!defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
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!defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
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#define MAX_HEADER LL_MAX_HEADER
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#else
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#define MAX_HEADER (LL_MAX_HEADER + 48)
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#endif
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struct net_device_subqueue
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{
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/* Give a control state for each queue. This struct may contain
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* per-queue locks in the future.
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*/
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unsigned long state;
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};
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/*
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* Network device statistics. Akin to the 2.0 ether stats but
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* with byte counters.
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*/
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struct net_device_stats
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{
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unsigned long rx_packets; /* total packets received */
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unsigned long tx_packets; /* total packets transmitted */
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unsigned long rx_bytes; /* total bytes received */
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unsigned long tx_bytes; /* total bytes transmitted */
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unsigned long rx_errors; /* bad packets received */
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unsigned long tx_errors; /* packet transmit problems */
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unsigned long rx_dropped; /* no space in linux buffers */
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unsigned long tx_dropped; /* no space available in linux */
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unsigned long multicast; /* multicast packets received */
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unsigned long collisions;
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/* detailed rx_errors: */
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unsigned long rx_length_errors;
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unsigned long rx_over_errors; /* receiver ring buff overflow */
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unsigned long rx_crc_errors; /* recved pkt with crc error */
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unsigned long rx_frame_errors; /* recv'd frame alignment error */
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unsigned long rx_fifo_errors; /* recv'r fifo overrun */
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unsigned long rx_missed_errors; /* receiver missed packet */
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/* detailed tx_errors */
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unsigned long tx_aborted_errors;
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unsigned long tx_carrier_errors;
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unsigned long tx_fifo_errors;
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unsigned long tx_heartbeat_errors;
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unsigned long tx_window_errors;
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/* for cslip etc */
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unsigned long rx_compressed;
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unsigned long tx_compressed;
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};
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/* Media selection options. */
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enum {
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IF_PORT_UNKNOWN = 0,
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IF_PORT_10BASE2,
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IF_PORT_10BASET,
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IF_PORT_AUI,
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IF_PORT_100BASET,
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IF_PORT_100BASETX,
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IF_PORT_100BASEFX
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};
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#ifdef __KERNEL__
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#include <linux/cache.h>
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#include <linux/skbuff.h>
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struct neighbour;
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struct neigh_parms;
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struct sk_buff;
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struct netif_rx_stats
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{
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unsigned total;
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unsigned dropped;
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unsigned time_squeeze;
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unsigned cpu_collision;
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};
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DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
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struct dev_addr_list
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{
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struct dev_addr_list *next;
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u8 da_addr[MAX_ADDR_LEN];
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u8 da_addrlen;
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u8 da_synced;
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int da_users;
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int da_gusers;
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};
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/*
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* We tag multicasts with these structures.
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*/
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#define dev_mc_list dev_addr_list
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#define dmi_addr da_addr
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#define dmi_addrlen da_addrlen
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#define dmi_users da_users
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#define dmi_gusers da_gusers
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struct hh_cache
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{
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struct hh_cache *hh_next; /* Next entry */
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atomic_t hh_refcnt; /* number of users */
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/*
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* We want hh_output, hh_len, hh_lock and hh_data be a in a separate
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* cache line on SMP.
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* They are mostly read, but hh_refcnt may be changed quite frequently,
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* incurring cache line ping pongs.
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*/
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__be16 hh_type ____cacheline_aligned_in_smp;
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/* protocol identifier, f.e ETH_P_IP
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* NOTE: For VLANs, this will be the
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* encapuslated type. --BLG
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*/
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u16 hh_len; /* length of header */
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int (*hh_output)(struct sk_buff *skb);
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seqlock_t hh_lock;
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/* cached hardware header; allow for machine alignment needs. */
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#define HH_DATA_MOD 16
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#define HH_DATA_OFF(__len) \
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(HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
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#define HH_DATA_ALIGN(__len) \
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(((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
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unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
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};
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/* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
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* Alternative is:
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* dev->hard_header_len ? (dev->hard_header_len +
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* (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
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*
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* We could use other alignment values, but we must maintain the
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* relationship HH alignment <= LL alignment.
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*/
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#define LL_RESERVED_SPACE(dev) \
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(((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
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#define LL_RESERVED_SPACE_EXTRA(dev,extra) \
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((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
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struct header_ops {
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int (*create) (struct sk_buff *skb, struct net_device *dev,
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unsigned short type, const void *daddr,
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const void *saddr, unsigned len);
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int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
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int (*rebuild)(struct sk_buff *skb);
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#define HAVE_HEADER_CACHE
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int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
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void (*cache_update)(struct hh_cache *hh,
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const struct net_device *dev,
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const unsigned char *haddr);
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};
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/* These flag bits are private to the generic network queueing
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* layer, they may not be explicitly referenced by any other
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* code.
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*/
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enum netdev_state_t
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{
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__LINK_STATE_XOFF=0,
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__LINK_STATE_START,
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__LINK_STATE_PRESENT,
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__LINK_STATE_SCHED,
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__LINK_STATE_NOCARRIER,
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__LINK_STATE_LINKWATCH_PENDING,
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__LINK_STATE_DORMANT,
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__LINK_STATE_QDISC_RUNNING,
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};
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/*
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* This structure holds at boot time configured netdevice settings. They
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* are then used in the device probing.
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*/
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struct netdev_boot_setup {
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char name[IFNAMSIZ];
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struct ifmap map;
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};
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#define NETDEV_BOOT_SETUP_MAX 8
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extern int __init netdev_boot_setup(char *str);
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/*
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* Structure for NAPI scheduling similar to tasklet but with weighting
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*/
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struct napi_struct {
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/* The poll_list must only be managed by the entity which
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* changes the state of the NAPI_STATE_SCHED bit. This means
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* whoever atomically sets that bit can add this napi_struct
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* to the per-cpu poll_list, and whoever clears that bit
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* can remove from the list right before clearing the bit.
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*/
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struct list_head poll_list;
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unsigned long state;
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int weight;
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int (*poll)(struct napi_struct *, int);
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#ifdef CONFIG_NETPOLL
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spinlock_t poll_lock;
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int poll_owner;
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struct net_device *dev;
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struct list_head dev_list;
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#endif
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};
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enum
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{
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NAPI_STATE_SCHED, /* Poll is scheduled */
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NAPI_STATE_DISABLE, /* Disable pending */
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};
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extern void __napi_schedule(struct napi_struct *n);
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static inline int napi_disable_pending(struct napi_struct *n)
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{
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return test_bit(NAPI_STATE_DISABLE, &n->state);
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}
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/**
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* napi_schedule_prep - check if napi can be scheduled
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* @n: napi context
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*
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* Test if NAPI routine is already running, and if not mark
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* it as running. This is used as a condition variable
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* insure only one NAPI poll instance runs. We also make
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* sure there is no pending NAPI disable.
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*/
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static inline int napi_schedule_prep(struct napi_struct *n)
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{
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return !napi_disable_pending(n) &&
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!test_and_set_bit(NAPI_STATE_SCHED, &n->state);
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}
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/**
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* napi_schedule - schedule NAPI poll
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* @n: napi context
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*
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* Schedule NAPI poll routine to be called if it is not already
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* running.
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*/
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static inline void napi_schedule(struct napi_struct *n)
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{
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if (napi_schedule_prep(n))
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__napi_schedule(n);
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}
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/* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
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static inline int napi_reschedule(struct napi_struct *napi)
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{
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if (napi_schedule_prep(napi)) {
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__napi_schedule(napi);
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return 1;
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}
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return 0;
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}
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/**
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* napi_complete - NAPI processing complete
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* @n: napi context
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*
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* Mark NAPI processing as complete.
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*/
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static inline void __napi_complete(struct napi_struct *n)
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{
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BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
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list_del(&n->poll_list);
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smp_mb__before_clear_bit();
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clear_bit(NAPI_STATE_SCHED, &n->state);
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}
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static inline void napi_complete(struct napi_struct *n)
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{
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local_irq_disable();
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__napi_complete(n);
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local_irq_enable();
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}
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/**
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* napi_disable - prevent NAPI from scheduling
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* @n: napi context
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*
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* Stop NAPI from being scheduled on this context.
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* Waits till any outstanding processing completes.
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*/
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static inline void napi_disable(struct napi_struct *n)
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{
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set_bit(NAPI_STATE_DISABLE, &n->state);
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while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
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msleep(1);
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clear_bit(NAPI_STATE_DISABLE, &n->state);
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}
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/**
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* napi_enable - enable NAPI scheduling
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* @n: napi context
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*
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* Resume NAPI from being scheduled on this context.
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* Must be paired with napi_disable.
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*/
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static inline void napi_enable(struct napi_struct *n)
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{
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BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
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smp_mb__before_clear_bit();
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clear_bit(NAPI_STATE_SCHED, &n->state);
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}
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#ifdef CONFIG_SMP
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/**
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* napi_synchronize - wait until NAPI is not running
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* @n: napi context
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*
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* Wait until NAPI is done being scheduled on this context.
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* Waits till any outstanding processing completes but
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* does not disable future activations.
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*/
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static inline void napi_synchronize(const struct napi_struct *n)
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{
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while (test_bit(NAPI_STATE_SCHED, &n->state))
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msleep(1);
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}
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#else
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# define napi_synchronize(n) barrier()
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#endif
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/*
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* The DEVICE structure.
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* Actually, this whole structure is a big mistake. It mixes I/O
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* data with strictly "high-level" data, and it has to know about
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* almost every data structure used in the INET module.
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*
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* FIXME: cleanup struct net_device such that network protocol info
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* moves out.
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*/
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struct net_device
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{
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/*
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* This is the first field of the "visible" part of this structure
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* (i.e. as seen by users in the "Space.c" file). It is the name
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* the interface.
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*/
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char name[IFNAMSIZ];
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/* device name hash chain */
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struct hlist_node name_hlist;
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/*
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* I/O specific fields
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* FIXME: Merge these and struct ifmap into one
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*/
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unsigned long mem_end; /* shared mem end */
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unsigned long mem_start; /* shared mem start */
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unsigned long base_addr; /* device I/O address */
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unsigned int irq; /* device IRQ number */
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/*
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* Some hardware also needs these fields, but they are not
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* part of the usual set specified in Space.c.
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*/
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unsigned char if_port; /* Selectable AUI, TP,..*/
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unsigned char dma; /* DMA channel */
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unsigned long state;
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struct list_head dev_list;
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#ifdef CONFIG_NETPOLL
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struct list_head napi_list;
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#endif
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/* The device initialization function. Called only once. */
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int (*init)(struct net_device *dev);
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/* ------- Fields preinitialized in Space.c finish here ------- */
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/* Net device features */
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unsigned long features;
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#define NETIF_F_SG 1 /* Scatter/gather IO. */
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#define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
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#define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
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#define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
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#define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
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#define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
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#define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
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#define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
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#define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
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#define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
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#define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
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#define NETIF_F_GSO 2048 /* Enable software GSO. */
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#define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
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/* do not use LLTX in new drivers */
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#define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
|
|
#define NETIF_F_MULTI_QUEUE 16384 /* Has multiple TX/RX queues */
|
|
#define NETIF_F_LRO 32768 /* large receive offload */
|
|
|
|
/* Segmentation offload features */
|
|
#define NETIF_F_GSO_SHIFT 16
|
|
#define NETIF_F_GSO_MASK 0xffff0000
|
|
#define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
|
|
#define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
|
|
#define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
|
|
#define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
|
|
#define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
|
|
|
|
/* List of features with software fallbacks. */
|
|
#define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
|
|
|
|
|
|
#define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
|
|
#define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
|
|
#define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
|
|
#define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
|
|
|
|
struct net_device *next_sched;
|
|
|
|
/* Interface index. Unique device identifier */
|
|
int ifindex;
|
|
int iflink;
|
|
|
|
|
|
struct net_device_stats* (*get_stats)(struct net_device *dev);
|
|
struct net_device_stats stats;
|
|
|
|
#ifdef CONFIG_WIRELESS_EXT
|
|
/* List of functions to handle Wireless Extensions (instead of ioctl).
|
|
* See <net/iw_handler.h> for details. Jean II */
|
|
const struct iw_handler_def * wireless_handlers;
|
|
/* Instance data managed by the core of Wireless Extensions. */
|
|
struct iw_public_data * wireless_data;
|
|
#endif
|
|
const struct ethtool_ops *ethtool_ops;
|
|
|
|
/* Hardware header description */
|
|
const struct header_ops *header_ops;
|
|
|
|
/*
|
|
* This marks the end of the "visible" part of the structure. All
|
|
* fields hereafter are internal to the system, and may change at
|
|
* will (read: may be cleaned up at will).
|
|
*/
|
|
|
|
|
|
unsigned int flags; /* interface flags (a la BSD) */
|
|
unsigned short gflags;
|
|
unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
|
|
unsigned short padded; /* How much padding added by alloc_netdev() */
|
|
|
|
unsigned char operstate; /* RFC2863 operstate */
|
|
unsigned char link_mode; /* mapping policy to operstate */
|
|
|
|
unsigned mtu; /* interface MTU value */
|
|
unsigned short type; /* interface hardware type */
|
|
unsigned short hard_header_len; /* hardware hdr length */
|
|
|
|
struct net_device *master; /* Pointer to master device of a group,
|
|
* which this device is member of.
|
|
*/
|
|
|
|
/* Interface address info. */
|
|
unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
|
|
unsigned char addr_len; /* hardware address length */
|
|
unsigned short dev_id; /* for shared network cards */
|
|
|
|
struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */
|
|
int uc_count; /* Number of installed ucasts */
|
|
int uc_promisc;
|
|
struct dev_addr_list *mc_list; /* Multicast mac addresses */
|
|
int mc_count; /* Number of installed mcasts */
|
|
int promiscuity;
|
|
int allmulti;
|
|
|
|
|
|
/* Protocol specific pointers */
|
|
|
|
void *atalk_ptr; /* AppleTalk link */
|
|
void *ip_ptr; /* IPv4 specific data */
|
|
void *dn_ptr; /* DECnet specific data */
|
|
void *ip6_ptr; /* IPv6 specific data */
|
|
void *ec_ptr; /* Econet specific data */
|
|
void *ax25_ptr; /* AX.25 specific data */
|
|
struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
|
|
assign before registering */
|
|
|
|
/*
|
|
* Cache line mostly used on receive path (including eth_type_trans())
|
|
*/
|
|
unsigned long last_rx; /* Time of last Rx */
|
|
/* Interface address info used in eth_type_trans() */
|
|
unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
|
|
because most packets are unicast) */
|
|
|
|
unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
|
|
|
|
/* ingress path synchronizer */
|
|
spinlock_t ingress_lock;
|
|
struct Qdisc *qdisc_ingress;
|
|
|
|
/*
|
|
* Cache line mostly used on queue transmit path (qdisc)
|
|
*/
|
|
/* device queue lock */
|
|
spinlock_t queue_lock ____cacheline_aligned_in_smp;
|
|
struct Qdisc *qdisc;
|
|
struct Qdisc *qdisc_sleeping;
|
|
struct list_head qdisc_list;
|
|
unsigned long tx_queue_len; /* Max frames per queue allowed */
|
|
|
|
/* Partially transmitted GSO packet. */
|
|
struct sk_buff *gso_skb;
|
|
|
|
/*
|
|
* One part is mostly used on xmit path (device)
|
|
*/
|
|
/* hard_start_xmit synchronizer */
|
|
spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
|
|
/* cpu id of processor entered to hard_start_xmit or -1,
|
|
if nobody entered there.
|
|
*/
|
|
int xmit_lock_owner;
|
|
void *priv; /* pointer to private data */
|
|
int (*hard_start_xmit) (struct sk_buff *skb,
|
|
struct net_device *dev);
|
|
/* These may be needed for future network-power-down code. */
|
|
unsigned long trans_start; /* Time (in jiffies) of last Tx */
|
|
|
|
int watchdog_timeo; /* used by dev_watchdog() */
|
|
struct timer_list watchdog_timer;
|
|
|
|
/*
|
|
* refcnt is a very hot point, so align it on SMP
|
|
*/
|
|
/* Number of references to this device */
|
|
atomic_t refcnt ____cacheline_aligned_in_smp;
|
|
|
|
/* delayed register/unregister */
|
|
struct list_head todo_list;
|
|
/* device index hash chain */
|
|
struct hlist_node index_hlist;
|
|
|
|
struct net_device *link_watch_next;
|
|
|
|
/* register/unregister state machine */
|
|
enum { NETREG_UNINITIALIZED=0,
|
|
NETREG_REGISTERED, /* completed register_netdevice */
|
|
NETREG_UNREGISTERING, /* called unregister_netdevice */
|
|
NETREG_UNREGISTERED, /* completed unregister todo */
|
|
NETREG_RELEASED, /* called free_netdev */
|
|
} reg_state;
|
|
|
|
/* Called after device is detached from network. */
|
|
void (*uninit)(struct net_device *dev);
|
|
/* Called after last user reference disappears. */
|
|
void (*destructor)(struct net_device *dev);
|
|
|
|
/* Pointers to interface service routines. */
|
|
int (*open)(struct net_device *dev);
|
|
int (*stop)(struct net_device *dev);
|
|
#define HAVE_NETDEV_POLL
|
|
#define HAVE_CHANGE_RX_FLAGS
|
|
void (*change_rx_flags)(struct net_device *dev,
|
|
int flags);
|
|
#define HAVE_SET_RX_MODE
|
|
void (*set_rx_mode)(struct net_device *dev);
|
|
#define HAVE_MULTICAST
|
|
void (*set_multicast_list)(struct net_device *dev);
|
|
#define HAVE_SET_MAC_ADDR
|
|
int (*set_mac_address)(struct net_device *dev,
|
|
void *addr);
|
|
#define HAVE_VALIDATE_ADDR
|
|
int (*validate_addr)(struct net_device *dev);
|
|
#define HAVE_PRIVATE_IOCTL
|
|
int (*do_ioctl)(struct net_device *dev,
|
|
struct ifreq *ifr, int cmd);
|
|
#define HAVE_SET_CONFIG
|
|
int (*set_config)(struct net_device *dev,
|
|
struct ifmap *map);
|
|
#define HAVE_CHANGE_MTU
|
|
int (*change_mtu)(struct net_device *dev, int new_mtu);
|
|
|
|
#define HAVE_TX_TIMEOUT
|
|
void (*tx_timeout) (struct net_device *dev);
|
|
|
|
void (*vlan_rx_register)(struct net_device *dev,
|
|
struct vlan_group *grp);
|
|
void (*vlan_rx_add_vid)(struct net_device *dev,
|
|
unsigned short vid);
|
|
void (*vlan_rx_kill_vid)(struct net_device *dev,
|
|
unsigned short vid);
|
|
|
|
int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
|
|
#ifdef CONFIG_NETPOLL
|
|
struct netpoll_info *npinfo;
|
|
#endif
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
void (*poll_controller)(struct net_device *dev);
|
|
#endif
|
|
|
|
/* Network namespace this network device is inside */
|
|
struct net *nd_net;
|
|
|
|
/* bridge stuff */
|
|
struct net_bridge_port *br_port;
|
|
/* macvlan */
|
|
struct macvlan_port *macvlan_port;
|
|
|
|
/* class/net/name entry */
|
|
struct device dev;
|
|
/* space for optional statistics and wireless sysfs groups */
|
|
struct attribute_group *sysfs_groups[3];
|
|
|
|
/* rtnetlink link ops */
|
|
const struct rtnl_link_ops *rtnl_link_ops;
|
|
|
|
/* The TX queue control structures */
|
|
unsigned int egress_subqueue_count;
|
|
struct net_device_subqueue egress_subqueue[1];
|
|
};
|
|
#define to_net_dev(d) container_of(d, struct net_device, dev)
|
|
|
|
#define NETDEV_ALIGN 32
|
|
#define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
|
|
|
|
/**
|
|
* netdev_priv - access network device private data
|
|
* @dev: network device
|
|
*
|
|
* Get network device private data
|
|
*/
|
|
static inline void *netdev_priv(const struct net_device *dev)
|
|
{
|
|
return dev->priv;
|
|
}
|
|
|
|
/* Set the sysfs physical device reference for the network logical device
|
|
* if set prior to registration will cause a symlink during initialization.
|
|
*/
|
|
#define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
|
|
|
|
/**
|
|
* netif_napi_add - initialize a napi context
|
|
* @dev: network device
|
|
* @napi: napi context
|
|
* @poll: polling function
|
|
* @weight: default weight
|
|
*
|
|
* netif_napi_add() must be used to initialize a napi context prior to calling
|
|
* *any* of the other napi related functions.
|
|
*/
|
|
static inline void netif_napi_add(struct net_device *dev,
|
|
struct napi_struct *napi,
|
|
int (*poll)(struct napi_struct *, int),
|
|
int weight)
|
|
{
|
|
INIT_LIST_HEAD(&napi->poll_list);
|
|
napi->poll = poll;
|
|
napi->weight = weight;
|
|
#ifdef CONFIG_NETPOLL
|
|
napi->dev = dev;
|
|
list_add(&napi->dev_list, &dev->napi_list);
|
|
spin_lock_init(&napi->poll_lock);
|
|
napi->poll_owner = -1;
|
|
#endif
|
|
set_bit(NAPI_STATE_SCHED, &napi->state);
|
|
}
|
|
|
|
struct packet_type {
|
|
__be16 type; /* This is really htons(ether_type). */
|
|
struct net_device *dev; /* NULL is wildcarded here */
|
|
int (*func) (struct sk_buff *,
|
|
struct net_device *,
|
|
struct packet_type *,
|
|
struct net_device *);
|
|
struct sk_buff *(*gso_segment)(struct sk_buff *skb,
|
|
int features);
|
|
int (*gso_send_check)(struct sk_buff *skb);
|
|
void *af_packet_priv;
|
|
struct list_head list;
|
|
};
|
|
|
|
#include <linux/interrupt.h>
|
|
#include <linux/notifier.h>
|
|
|
|
extern rwlock_t dev_base_lock; /* Device list lock */
|
|
|
|
|
|
#define for_each_netdev(net, d) \
|
|
list_for_each_entry(d, &(net)->dev_base_head, dev_list)
|
|
#define for_each_netdev_safe(net, d, n) \
|
|
list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
|
|
#define for_each_netdev_continue(net, d) \
|
|
list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
|
|
#define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
|
|
|
|
static inline struct net_device *next_net_device(struct net_device *dev)
|
|
{
|
|
struct list_head *lh;
|
|
struct net *net;
|
|
|
|
net = dev->nd_net;
|
|
lh = dev->dev_list.next;
|
|
return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
|
|
}
|
|
|
|
static inline struct net_device *first_net_device(struct net *net)
|
|
{
|
|
return list_empty(&net->dev_base_head) ? NULL :
|
|
net_device_entry(net->dev_base_head.next);
|
|
}
|
|
|
|
extern int netdev_boot_setup_check(struct net_device *dev);
|
|
extern unsigned long netdev_boot_base(const char *prefix, int unit);
|
|
extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
|
|
extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
|
|
extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
|
|
extern void dev_add_pack(struct packet_type *pt);
|
|
extern void dev_remove_pack(struct packet_type *pt);
|
|
extern void __dev_remove_pack(struct packet_type *pt);
|
|
|
|
extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
|
|
unsigned short mask);
|
|
extern struct net_device *dev_get_by_name(struct net *net, const char *name);
|
|
extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
|
|
extern int dev_alloc_name(struct net_device *dev, const char *name);
|
|
extern int dev_open(struct net_device *dev);
|
|
extern int dev_close(struct net_device *dev);
|
|
extern int dev_queue_xmit(struct sk_buff *skb);
|
|
extern int register_netdevice(struct net_device *dev);
|
|
extern void unregister_netdevice(struct net_device *dev);
|
|
extern void free_netdev(struct net_device *dev);
|
|
extern void synchronize_net(void);
|
|
extern int register_netdevice_notifier(struct notifier_block *nb);
|
|
extern int unregister_netdevice_notifier(struct notifier_block *nb);
|
|
extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
|
|
extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
|
|
extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
|
|
extern int dev_restart(struct net_device *dev);
|
|
#ifdef CONFIG_NETPOLL_TRAP
|
|
extern int netpoll_trap(void);
|
|
#endif
|
|
|
|
static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
|
|
unsigned short type,
|
|
const void *daddr, const void *saddr,
|
|
unsigned len)
|
|
{
|
|
if (!dev->header_ops || !dev->header_ops->create)
|
|
return 0;
|
|
|
|
return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
|
|
}
|
|
|
|
static inline int dev_parse_header(const struct sk_buff *skb,
|
|
unsigned char *haddr)
|
|
{
|
|
const struct net_device *dev = skb->dev;
|
|
|
|
if (!dev->header_ops || !dev->header_ops->parse)
|
|
return 0;
|
|
return dev->header_ops->parse(skb, haddr);
|
|
}
|
|
|
|
typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
|
|
extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
|
|
static inline int unregister_gifconf(unsigned int family)
|
|
{
|
|
return register_gifconf(family, NULL);
|
|
}
|
|
|
|
/*
|
|
* Incoming packets are placed on per-cpu queues so that
|
|
* no locking is needed.
|
|
*/
|
|
struct softnet_data
|
|
{
|
|
struct net_device *output_queue;
|
|
struct sk_buff_head input_pkt_queue;
|
|
struct list_head poll_list;
|
|
struct sk_buff *completion_queue;
|
|
|
|
struct napi_struct backlog;
|
|
#ifdef CONFIG_NET_DMA
|
|
struct dma_chan *net_dma;
|
|
#endif
|
|
};
|
|
|
|
DECLARE_PER_CPU(struct softnet_data,softnet_data);
|
|
|
|
#define HAVE_NETIF_QUEUE
|
|
|
|
extern void __netif_schedule(struct net_device *dev);
|
|
|
|
static inline void netif_schedule(struct net_device *dev)
|
|
{
|
|
if (!test_bit(__LINK_STATE_XOFF, &dev->state))
|
|
__netif_schedule(dev);
|
|
}
|
|
|
|
/**
|
|
* netif_start_queue - allow transmit
|
|
* @dev: network device
|
|
*
|
|
* Allow upper layers to call the device hard_start_xmit routine.
|
|
*/
|
|
static inline void netif_start_queue(struct net_device *dev)
|
|
{
|
|
clear_bit(__LINK_STATE_XOFF, &dev->state);
|
|
}
|
|
|
|
/**
|
|
* netif_wake_queue - restart transmit
|
|
* @dev: network device
|
|
*
|
|
* Allow upper layers to call the device hard_start_xmit routine.
|
|
* Used for flow control when transmit resources are available.
|
|
*/
|
|
static inline void netif_wake_queue(struct net_device *dev)
|
|
{
|
|
#ifdef CONFIG_NETPOLL_TRAP
|
|
if (netpoll_trap()) {
|
|
clear_bit(__LINK_STATE_XOFF, &dev->state);
|
|
return;
|
|
}
|
|
#endif
|
|
if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
|
|
__netif_schedule(dev);
|
|
}
|
|
|
|
/**
|
|
* netif_stop_queue - stop transmitted packets
|
|
* @dev: network device
|
|
*
|
|
* Stop upper layers calling the device hard_start_xmit routine.
|
|
* Used for flow control when transmit resources are unavailable.
|
|
*/
|
|
static inline void netif_stop_queue(struct net_device *dev)
|
|
{
|
|
set_bit(__LINK_STATE_XOFF, &dev->state);
|
|
}
|
|
|
|
/**
|
|
* netif_queue_stopped - test if transmit queue is flowblocked
|
|
* @dev: network device
|
|
*
|
|
* Test if transmit queue on device is currently unable to send.
|
|
*/
|
|
static inline int netif_queue_stopped(const struct net_device *dev)
|
|
{
|
|
return test_bit(__LINK_STATE_XOFF, &dev->state);
|
|
}
|
|
|
|
/**
|
|
* netif_running - test if up
|
|
* @dev: network device
|
|
*
|
|
* Test if the device has been brought up.
|
|
*/
|
|
static inline int netif_running(const struct net_device *dev)
|
|
{
|
|
return test_bit(__LINK_STATE_START, &dev->state);
|
|
}
|
|
|
|
/*
|
|
* Routines to manage the subqueues on a device. We only need start
|
|
* stop, and a check if it's stopped. All other device management is
|
|
* done at the overall netdevice level.
|
|
* Also test the device if we're multiqueue.
|
|
*/
|
|
|
|
/**
|
|
* netif_start_subqueue - allow sending packets on subqueue
|
|
* @dev: network device
|
|
* @queue_index: sub queue index
|
|
*
|
|
* Start individual transmit queue of a device with multiple transmit queues.
|
|
*/
|
|
static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
|
|
{
|
|
#ifdef CONFIG_NETDEVICES_MULTIQUEUE
|
|
clear_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state);
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* netif_stop_subqueue - stop sending packets on subqueue
|
|
* @dev: network device
|
|
* @queue_index: sub queue index
|
|
*
|
|
* Stop individual transmit queue of a device with multiple transmit queues.
|
|
*/
|
|
static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
|
|
{
|
|
#ifdef CONFIG_NETDEVICES_MULTIQUEUE
|
|
#ifdef CONFIG_NETPOLL_TRAP
|
|
if (netpoll_trap())
|
|
return;
|
|
#endif
|
|
set_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state);
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* netif_subqueue_stopped - test status of subqueue
|
|
* @dev: network device
|
|
* @queue_index: sub queue index
|
|
*
|
|
* Check individual transmit queue of a device with multiple transmit queues.
|
|
*/
|
|
static inline int __netif_subqueue_stopped(const struct net_device *dev,
|
|
u16 queue_index)
|
|
{
|
|
#ifdef CONFIG_NETDEVICES_MULTIQUEUE
|
|
return test_bit(__LINK_STATE_XOFF,
|
|
&dev->egress_subqueue[queue_index].state);
|
|
#else
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
static inline int netif_subqueue_stopped(const struct net_device *dev,
|
|
struct sk_buff *skb)
|
|
{
|
|
return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
|
|
}
|
|
|
|
/**
|
|
* netif_wake_subqueue - allow sending packets on subqueue
|
|
* @dev: network device
|
|
* @queue_index: sub queue index
|
|
*
|
|
* Resume individual transmit queue of a device with multiple transmit queues.
|
|
*/
|
|
static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
|
|
{
|
|
#ifdef CONFIG_NETDEVICES_MULTIQUEUE
|
|
#ifdef CONFIG_NETPOLL_TRAP
|
|
if (netpoll_trap())
|
|
return;
|
|
#endif
|
|
if (test_and_clear_bit(__LINK_STATE_XOFF,
|
|
&dev->egress_subqueue[queue_index].state))
|
|
__netif_schedule(dev);
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* netif_is_multiqueue - test if device has multiple transmit queues
|
|
* @dev: network device
|
|
*
|
|
* Check if device has multiple transmit queues
|
|
* Always falls if NETDEVICE_MULTIQUEUE is not configured
|
|
*/
|
|
static inline int netif_is_multiqueue(const struct net_device *dev)
|
|
{
|
|
#ifdef CONFIG_NETDEVICES_MULTIQUEUE
|
|
return (!!(NETIF_F_MULTI_QUEUE & dev->features));
|
|
#else
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
/* Use this variant when it is known for sure that it
|
|
* is executing from interrupt context.
|
|
*/
|
|
extern void dev_kfree_skb_irq(struct sk_buff *skb);
|
|
|
|
/* Use this variant in places where it could be invoked
|
|
* either from interrupt or non-interrupt context.
|
|
*/
|
|
extern void dev_kfree_skb_any(struct sk_buff *skb);
|
|
|
|
#define HAVE_NETIF_RX 1
|
|
extern int netif_rx(struct sk_buff *skb);
|
|
extern int netif_rx_ni(struct sk_buff *skb);
|
|
#define HAVE_NETIF_RECEIVE_SKB 1
|
|
extern int netif_receive_skb(struct sk_buff *skb);
|
|
extern int dev_valid_name(const char *name);
|
|
extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
|
|
extern int dev_ethtool(struct net *net, struct ifreq *);
|
|
extern unsigned dev_get_flags(const struct net_device *);
|
|
extern int dev_change_flags(struct net_device *, unsigned);
|
|
extern int dev_change_name(struct net_device *, char *);
|
|
extern int dev_change_net_namespace(struct net_device *,
|
|
struct net *, const char *);
|
|
extern int dev_set_mtu(struct net_device *, int);
|
|
extern int dev_set_mac_address(struct net_device *,
|
|
struct sockaddr *);
|
|
extern int dev_hard_start_xmit(struct sk_buff *skb,
|
|
struct net_device *dev);
|
|
|
|
extern int netdev_budget;
|
|
|
|
/* Called by rtnetlink.c:rtnl_unlock() */
|
|
extern void netdev_run_todo(void);
|
|
|
|
/**
|
|
* dev_put - release reference to device
|
|
* @dev: network device
|
|
*
|
|
* Release reference to device to allow it to be freed.
|
|
*/
|
|
static inline void dev_put(struct net_device *dev)
|
|
{
|
|
atomic_dec(&dev->refcnt);
|
|
}
|
|
|
|
/**
|
|
* dev_hold - get reference to device
|
|
* @dev: network device
|
|
*
|
|
* Hold reference to device to keep it from being freed.
|
|
*/
|
|
static inline void dev_hold(struct net_device *dev)
|
|
{
|
|
atomic_inc(&dev->refcnt);
|
|
}
|
|
|
|
/* Carrier loss detection, dial on demand. The functions netif_carrier_on
|
|
* and _off may be called from IRQ context, but it is caller
|
|
* who is responsible for serialization of these calls.
|
|
*
|
|
* The name carrier is inappropriate, these functions should really be
|
|
* called netif_lowerlayer_*() because they represent the state of any
|
|
* kind of lower layer not just hardware media.
|
|
*/
|
|
|
|
extern void linkwatch_fire_event(struct net_device *dev);
|
|
|
|
/**
|
|
* netif_carrier_ok - test if carrier present
|
|
* @dev: network device
|
|
*
|
|
* Check if carrier is present on device
|
|
*/
|
|
static inline int netif_carrier_ok(const struct net_device *dev)
|
|
{
|
|
return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
|
|
}
|
|
|
|
extern void __netdev_watchdog_up(struct net_device *dev);
|
|
|
|
extern void netif_carrier_on(struct net_device *dev);
|
|
|
|
extern void netif_carrier_off(struct net_device *dev);
|
|
|
|
/**
|
|
* netif_dormant_on - mark device as dormant.
|
|
* @dev: network device
|
|
*
|
|
* Mark device as dormant (as per RFC2863).
|
|
*
|
|
* The dormant state indicates that the relevant interface is not
|
|
* actually in a condition to pass packets (i.e., it is not 'up') but is
|
|
* in a "pending" state, waiting for some external event. For "on-
|
|
* demand" interfaces, this new state identifies the situation where the
|
|
* interface is waiting for events to place it in the up state.
|
|
*
|
|
*/
|
|
static inline void netif_dormant_on(struct net_device *dev)
|
|
{
|
|
if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
|
|
linkwatch_fire_event(dev);
|
|
}
|
|
|
|
/**
|
|
* netif_dormant_off - set device as not dormant.
|
|
* @dev: network device
|
|
*
|
|
* Device is not in dormant state.
|
|
*/
|
|
static inline void netif_dormant_off(struct net_device *dev)
|
|
{
|
|
if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
|
|
linkwatch_fire_event(dev);
|
|
}
|
|
|
|
/**
|
|
* netif_dormant - test if carrier present
|
|
* @dev: network device
|
|
*
|
|
* Check if carrier is present on device
|
|
*/
|
|
static inline int netif_dormant(const struct net_device *dev)
|
|
{
|
|
return test_bit(__LINK_STATE_DORMANT, &dev->state);
|
|
}
|
|
|
|
|
|
/**
|
|
* netif_oper_up - test if device is operational
|
|
* @dev: network device
|
|
*
|
|
* Check if carrier is operational
|
|
*/
|
|
static inline int netif_oper_up(const struct net_device *dev) {
|
|
return (dev->operstate == IF_OPER_UP ||
|
|
dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
|
|
}
|
|
|
|
/**
|
|
* netif_device_present - is device available or removed
|
|
* @dev: network device
|
|
*
|
|
* Check if device has not been removed from system.
|
|
*/
|
|
static inline int netif_device_present(struct net_device *dev)
|
|
{
|
|
return test_bit(__LINK_STATE_PRESENT, &dev->state);
|
|
}
|
|
|
|
extern void netif_device_detach(struct net_device *dev);
|
|
|
|
extern void netif_device_attach(struct net_device *dev);
|
|
|
|
/*
|
|
* Network interface message level settings
|
|
*/
|
|
#define HAVE_NETIF_MSG 1
|
|
|
|
enum {
|
|
NETIF_MSG_DRV = 0x0001,
|
|
NETIF_MSG_PROBE = 0x0002,
|
|
NETIF_MSG_LINK = 0x0004,
|
|
NETIF_MSG_TIMER = 0x0008,
|
|
NETIF_MSG_IFDOWN = 0x0010,
|
|
NETIF_MSG_IFUP = 0x0020,
|
|
NETIF_MSG_RX_ERR = 0x0040,
|
|
NETIF_MSG_TX_ERR = 0x0080,
|
|
NETIF_MSG_TX_QUEUED = 0x0100,
|
|
NETIF_MSG_INTR = 0x0200,
|
|
NETIF_MSG_TX_DONE = 0x0400,
|
|
NETIF_MSG_RX_STATUS = 0x0800,
|
|
NETIF_MSG_PKTDATA = 0x1000,
|
|
NETIF_MSG_HW = 0x2000,
|
|
NETIF_MSG_WOL = 0x4000,
|
|
};
|
|
|
|
#define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
|
|
#define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
|
|
#define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
|
|
#define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
|
|
#define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
|
|
#define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
|
|
#define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
|
|
#define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
|
|
#define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
|
|
#define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
|
|
#define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
|
|
#define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
|
|
#define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
|
|
#define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
|
|
#define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
|
|
|
|
static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
|
|
{
|
|
/* use default */
|
|
if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
|
|
return default_msg_enable_bits;
|
|
if (debug_value == 0) /* no output */
|
|
return 0;
|
|
/* set low N bits */
|
|
return (1 << debug_value) - 1;
|
|
}
|
|
|
|
/* Test if receive needs to be scheduled but only if up */
|
|
static inline int netif_rx_schedule_prep(struct net_device *dev,
|
|
struct napi_struct *napi)
|
|
{
|
|
return napi_schedule_prep(napi);
|
|
}
|
|
|
|
/* Add interface to tail of rx poll list. This assumes that _prep has
|
|
* already been called and returned 1.
|
|
*/
|
|
static inline void __netif_rx_schedule(struct net_device *dev,
|
|
struct napi_struct *napi)
|
|
{
|
|
__napi_schedule(napi);
|
|
}
|
|
|
|
/* Try to reschedule poll. Called by irq handler. */
|
|
|
|
static inline void netif_rx_schedule(struct net_device *dev,
|
|
struct napi_struct *napi)
|
|
{
|
|
if (netif_rx_schedule_prep(dev, napi))
|
|
__netif_rx_schedule(dev, napi);
|
|
}
|
|
|
|
/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */
|
|
static inline int netif_rx_reschedule(struct net_device *dev,
|
|
struct napi_struct *napi)
|
|
{
|
|
if (napi_schedule_prep(napi)) {
|
|
__netif_rx_schedule(dev, napi);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* same as netif_rx_complete, except that local_irq_save(flags)
|
|
* has already been issued
|
|
*/
|
|
static inline void __netif_rx_complete(struct net_device *dev,
|
|
struct napi_struct *napi)
|
|
{
|
|
__napi_complete(napi);
|
|
}
|
|
|
|
/* Remove interface from poll list: it must be in the poll list
|
|
* on current cpu. This primitive is called by dev->poll(), when
|
|
* it completes the work. The device cannot be out of poll list at this
|
|
* moment, it is BUG().
|
|
*/
|
|
static inline void netif_rx_complete(struct net_device *dev,
|
|
struct napi_struct *napi)
|
|
{
|
|
unsigned long flags;
|
|
|
|
local_irq_save(flags);
|
|
__netif_rx_complete(dev, napi);
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
/**
|
|
* netif_tx_lock - grab network device transmit lock
|
|
* @dev: network device
|
|
* @cpu: cpu number of lock owner
|
|
*
|
|
* Get network device transmit lock
|
|
*/
|
|
static inline void __netif_tx_lock(struct net_device *dev, int cpu)
|
|
{
|
|
spin_lock(&dev->_xmit_lock);
|
|
dev->xmit_lock_owner = cpu;
|
|
}
|
|
|
|
static inline void netif_tx_lock(struct net_device *dev)
|
|
{
|
|
__netif_tx_lock(dev, smp_processor_id());
|
|
}
|
|
|
|
static inline void netif_tx_lock_bh(struct net_device *dev)
|
|
{
|
|
spin_lock_bh(&dev->_xmit_lock);
|
|
dev->xmit_lock_owner = smp_processor_id();
|
|
}
|
|
|
|
static inline int netif_tx_trylock(struct net_device *dev)
|
|
{
|
|
int ok = spin_trylock(&dev->_xmit_lock);
|
|
if (likely(ok))
|
|
dev->xmit_lock_owner = smp_processor_id();
|
|
return ok;
|
|
}
|
|
|
|
static inline void netif_tx_unlock(struct net_device *dev)
|
|
{
|
|
dev->xmit_lock_owner = -1;
|
|
spin_unlock(&dev->_xmit_lock);
|
|
}
|
|
|
|
static inline void netif_tx_unlock_bh(struct net_device *dev)
|
|
{
|
|
dev->xmit_lock_owner = -1;
|
|
spin_unlock_bh(&dev->_xmit_lock);
|
|
}
|
|
|
|
#define HARD_TX_LOCK(dev, cpu) { \
|
|
if ((dev->features & NETIF_F_LLTX) == 0) { \
|
|
__netif_tx_lock(dev, cpu); \
|
|
} \
|
|
}
|
|
|
|
#define HARD_TX_UNLOCK(dev) { \
|
|
if ((dev->features & NETIF_F_LLTX) == 0) { \
|
|
netif_tx_unlock(dev); \
|
|
} \
|
|
}
|
|
|
|
static inline void netif_tx_disable(struct net_device *dev)
|
|
{
|
|
netif_tx_lock_bh(dev);
|
|
netif_stop_queue(dev);
|
|
netif_tx_unlock_bh(dev);
|
|
}
|
|
|
|
/* These functions live elsewhere (drivers/net/net_init.c, but related) */
|
|
|
|
extern void ether_setup(struct net_device *dev);
|
|
|
|
/* Support for loadable net-drivers */
|
|
extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
|
|
void (*setup)(struct net_device *),
|
|
unsigned int queue_count);
|
|
#define alloc_netdev(sizeof_priv, name, setup) \
|
|
alloc_netdev_mq(sizeof_priv, name, setup, 1)
|
|
extern int register_netdev(struct net_device *dev);
|
|
extern void unregister_netdev(struct net_device *dev);
|
|
/* Functions used for secondary unicast and multicast support */
|
|
extern void dev_set_rx_mode(struct net_device *dev);
|
|
extern void __dev_set_rx_mode(struct net_device *dev);
|
|
extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen);
|
|
extern int dev_unicast_add(struct net_device *dev, void *addr, int alen);
|
|
extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
|
|
extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
|
|
extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
|
|
extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
|
|
extern int dev_mc_sync(struct net_device *to, struct net_device *from);
|
|
extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
|
|
extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
|
|
extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
|
|
extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
|
|
extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
|
|
extern void dev_set_promiscuity(struct net_device *dev, int inc);
|
|
extern void dev_set_allmulti(struct net_device *dev, int inc);
|
|
extern void netdev_state_change(struct net_device *dev);
|
|
extern void netdev_features_change(struct net_device *dev);
|
|
/* Load a device via the kmod */
|
|
extern void dev_load(struct net *net, const char *name);
|
|
extern void dev_mcast_init(void);
|
|
extern int netdev_max_backlog;
|
|
extern int weight_p;
|
|
extern int netdev_set_master(struct net_device *dev, struct net_device *master);
|
|
extern int skb_checksum_help(struct sk_buff *skb);
|
|
extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
|
|
#ifdef CONFIG_BUG
|
|
extern void netdev_rx_csum_fault(struct net_device *dev);
|
|
#else
|
|
static inline void netdev_rx_csum_fault(struct net_device *dev)
|
|
{
|
|
}
|
|
#endif
|
|
/* rx skb timestamps */
|
|
extern void net_enable_timestamp(void);
|
|
extern void net_disable_timestamp(void);
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
|
|
extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
|
|
extern void dev_seq_stop(struct seq_file *seq, void *v);
|
|
#endif
|
|
|
|
extern void linkwatch_run_queue(void);
|
|
|
|
extern int netdev_compute_features(unsigned long all, unsigned long one);
|
|
|
|
static inline int net_gso_ok(int features, int gso_type)
|
|
{
|
|
int feature = gso_type << NETIF_F_GSO_SHIFT;
|
|
return (features & feature) == feature;
|
|
}
|
|
|
|
static inline int skb_gso_ok(struct sk_buff *skb, int features)
|
|
{
|
|
return net_gso_ok(features, skb_shinfo(skb)->gso_type);
|
|
}
|
|
|
|
static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
|
|
{
|
|
return skb_is_gso(skb) &&
|
|
(!skb_gso_ok(skb, dev->features) ||
|
|
unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
|
|
}
|
|
|
|
/* On bonding slaves other than the currently active slave, suppress
|
|
* duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
|
|
* ARP on active-backup slaves with arp_validate enabled.
|
|
*/
|
|
static inline int skb_bond_should_drop(struct sk_buff *skb)
|
|
{
|
|
struct net_device *dev = skb->dev;
|
|
struct net_device *master = dev->master;
|
|
|
|
if (master &&
|
|
(dev->priv_flags & IFF_SLAVE_INACTIVE)) {
|
|
if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
|
|
skb->protocol == __constant_htons(ETH_P_ARP))
|
|
return 0;
|
|
|
|
if (master->priv_flags & IFF_MASTER_ALB) {
|
|
if (skb->pkt_type != PACKET_BROADCAST &&
|
|
skb->pkt_type != PACKET_MULTICAST)
|
|
return 0;
|
|
}
|
|
if (master->priv_flags & IFF_MASTER_8023AD &&
|
|
skb->protocol == __constant_htons(ETH_P_SLOW))
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* _LINUX_DEV_H */
|