1049 lines
31 KiB
C
1049 lines
31 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 <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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struct divert_blk;
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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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/* 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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#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) && \
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!defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_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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/*
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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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/*
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* We tag multicasts with these structures.
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*/
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struct dev_mc_list
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{
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struct dev_mc_list *next;
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__u8 dmi_addr[MAX_ADDR_LEN];
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unsigned char dmi_addrlen;
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int dmi_users;
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int dmi_gusers;
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};
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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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__be16 hh_type; /* 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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int hh_len; /* length of header */
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int (*hh_output)(struct sk_buff *skb);
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rwlock_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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/* 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_RX_SCHED,
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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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* 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 net_device *next;
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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 only 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_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 */
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/* Segmentation offload features */
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#define NETIF_F_GSO_SHIFT 16
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#define NETIF_F_GSO_MASK 0xffff0000
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#define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
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#define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
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#define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
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#define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
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#define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
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/* List of features with software fallbacks. */
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#define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
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#define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
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#define NETIF_F_ALL_CSUM (NETIF_F_IP_CSUM | NETIF_F_GEN_CSUM)
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struct net_device *next_sched;
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/* Interface index. Unique device identifier */
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int ifindex;
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int iflink;
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struct net_device_stats* (*get_stats)(struct net_device *dev);
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/* List of functions to handle Wireless Extensions (instead of ioctl).
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* See <net/iw_handler.h> for details. Jean II */
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const struct iw_handler_def * wireless_handlers;
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/* Instance data managed by the core of Wireless Extensions. */
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struct iw_public_data * wireless_data;
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const struct ethtool_ops *ethtool_ops;
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/*
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* This marks the end of the "visible" part of the structure. All
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* fields hereafter are internal to the system, and may change at
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* will (read: may be cleaned up at will).
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*/
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unsigned int flags; /* interface flags (a la BSD) */
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unsigned short gflags;
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unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
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unsigned short padded; /* How much padding added by alloc_netdev() */
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unsigned char operstate; /* RFC2863 operstate */
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unsigned char link_mode; /* mapping policy to operstate */
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unsigned mtu; /* interface MTU value */
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unsigned short type; /* interface hardware type */
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unsigned short hard_header_len; /* hardware hdr length */
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struct net_device *master; /* Pointer to master device of a group,
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* which this device is member of.
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*/
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/* Interface address info. */
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unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
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unsigned char addr_len; /* hardware address length */
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unsigned short dev_id; /* for shared network cards */
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struct dev_mc_list *mc_list; /* Multicast mac addresses */
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int mc_count; /* Number of installed mcasts */
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int promiscuity;
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int allmulti;
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/* Protocol specific pointers */
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void *atalk_ptr; /* AppleTalk link */
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void *ip_ptr; /* IPv4 specific data */
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void *dn_ptr; /* DECnet specific data */
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void *ip6_ptr; /* IPv6 specific data */
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void *ec_ptr; /* Econet specific data */
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void *ax25_ptr; /* AX.25 specific data */
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/*
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* Cache line mostly used on receive path (including eth_type_trans())
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*/
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struct list_head poll_list ____cacheline_aligned_in_smp;
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/* Link to poll list */
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int (*poll) (struct net_device *dev, int *quota);
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int quota;
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int weight;
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unsigned long last_rx; /* Time of last Rx */
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/* Interface address info used in eth_type_trans() */
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unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
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because most packets are unicast) */
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unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
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/*
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* Cache line mostly used on queue transmit path (qdisc)
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*/
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/* device queue lock */
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spinlock_t queue_lock ____cacheline_aligned_in_smp;
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struct Qdisc *qdisc;
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struct Qdisc *qdisc_sleeping;
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struct list_head qdisc_list;
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unsigned long tx_queue_len; /* Max frames per queue allowed */
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/* Partially transmitted GSO packet. */
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struct sk_buff *gso_skb;
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/* ingress path synchronizer */
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spinlock_t ingress_lock;
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struct Qdisc *qdisc_ingress;
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/*
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* One part is mostly used on xmit path (device)
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*/
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/* hard_start_xmit synchronizer */
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spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
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/* cpu id of processor entered to hard_start_xmit or -1,
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if nobody entered there.
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*/
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int xmit_lock_owner;
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void *priv; /* pointer to private data */
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int (*hard_start_xmit) (struct sk_buff *skb,
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struct net_device *dev);
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/* These may be needed for future network-power-down code. */
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unsigned long trans_start; /* Time (in jiffies) of last Tx */
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int watchdog_timeo; /* used by dev_watchdog() */
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struct timer_list watchdog_timer;
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/*
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* refcnt is a very hot point, so align it on SMP
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*/
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/* Number of references to this device */
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atomic_t refcnt ____cacheline_aligned_in_smp;
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/* delayed register/unregister */
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struct list_head todo_list;
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/* device index hash chain */
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struct hlist_node index_hlist;
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/* register/unregister state machine */
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enum { NETREG_UNINITIALIZED=0,
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NETREG_REGISTERED, /* completed register_netdevice */
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NETREG_UNREGISTERING, /* called unregister_netdevice */
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NETREG_UNREGISTERED, /* completed unregister todo */
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NETREG_RELEASED, /* called free_netdev */
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} reg_state;
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/* Called after device is detached from network. */
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void (*uninit)(struct net_device *dev);
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/* Called after last user reference disappears. */
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void (*destructor)(struct net_device *dev);
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/* Pointers to interface service routines. */
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int (*open)(struct net_device *dev);
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int (*stop)(struct net_device *dev);
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#define HAVE_NETDEV_POLL
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int (*hard_header) (struct sk_buff *skb,
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struct net_device *dev,
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unsigned short type,
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void *daddr,
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void *saddr,
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unsigned len);
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int (*rebuild_header)(struct sk_buff *skb);
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#define HAVE_MULTICAST
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void (*set_multicast_list)(struct net_device *dev);
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#define HAVE_SET_MAC_ADDR
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int (*set_mac_address)(struct net_device *dev,
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void *addr);
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#define HAVE_PRIVATE_IOCTL
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int (*do_ioctl)(struct net_device *dev,
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struct ifreq *ifr, int cmd);
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#define HAVE_SET_CONFIG
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int (*set_config)(struct net_device *dev,
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struct ifmap *map);
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#define HAVE_HEADER_CACHE
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int (*hard_header_cache)(struct neighbour *neigh,
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struct hh_cache *hh);
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void (*header_cache_update)(struct hh_cache *hh,
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struct net_device *dev,
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unsigned char * haddr);
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#define HAVE_CHANGE_MTU
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int (*change_mtu)(struct net_device *dev, int new_mtu);
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|
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#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 (*hard_header_parse)(struct sk_buff *skb,
|
|
unsigned char *haddr);
|
|
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
|
|
|
|
/* bridge stuff */
|
|
struct net_bridge_port *br_port;
|
|
|
|
#ifdef CONFIG_NET_DIVERT
|
|
/* this will get initialized at each interface type init routine */
|
|
struct divert_blk *divert;
|
|
#endif /* CONFIG_NET_DIVERT */
|
|
|
|
/* class/net/name entry */
|
|
struct class_device class_dev;
|
|
/* space for optional statistics and wireless sysfs groups */
|
|
struct attribute_group *sysfs_groups[3];
|
|
};
|
|
|
|
#define NETDEV_ALIGN 32
|
|
#define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
|
|
|
|
static inline void *netdev_priv(struct net_device *dev)
|
|
{
|
|
return (char *)dev + ((sizeof(struct net_device)
|
|
+ NETDEV_ALIGN_CONST)
|
|
& ~NETDEV_ALIGN_CONST);
|
|
}
|
|
|
|
#define SET_MODULE_OWNER(dev) do { } while (0)
|
|
/* 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)->class_dev.dev = (pdev))
|
|
|
|
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 struct net_device loopback_dev; /* The loopback */
|
|
extern struct net_device *dev_base; /* All devices */
|
|
extern rwlock_t dev_base_lock; /* Device list lock */
|
|
|
|
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(unsigned short type, char *hwaddr);
|
|
extern struct net_device *dev_getfirstbyhwtype(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(unsigned short flags,
|
|
unsigned short mask);
|
|
extern struct net_device *dev_get_by_name(const char *name);
|
|
extern struct net_device *__dev_get_by_name(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 int 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, void *v);
|
|
extern struct net_device *dev_get_by_index(int ifindex);
|
|
extern struct net_device *__dev_get_by_index(int ifindex);
|
|
extern int dev_restart(struct net_device *dev);
|
|
#ifdef CONFIG_NETPOLL_TRAP
|
|
extern int netpoll_trap(void);
|
|
#endif
|
|
|
|
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 net_device backlog_dev; /* Sorry. 8) */
|
|
#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);
|
|
}
|
|
|
|
static inline void netif_start_queue(struct net_device *dev)
|
|
{
|
|
clear_bit(__LINK_STATE_XOFF, &dev->state);
|
|
}
|
|
|
|
static inline void netif_wake_queue(struct net_device *dev)
|
|
{
|
|
#ifdef CONFIG_NETPOLL_TRAP
|
|
if (netpoll_trap())
|
|
return;
|
|
#endif
|
|
if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
|
|
__netif_schedule(dev);
|
|
}
|
|
|
|
static inline void netif_stop_queue(struct net_device *dev)
|
|
{
|
|
#ifdef CONFIG_NETPOLL_TRAP
|
|
if (netpoll_trap())
|
|
return;
|
|
#endif
|
|
set_bit(__LINK_STATE_XOFF, &dev->state);
|
|
}
|
|
|
|
static inline int netif_queue_stopped(const struct net_device *dev)
|
|
{
|
|
return test_bit(__LINK_STATE_XOFF, &dev->state);
|
|
}
|
|
|
|
static inline int netif_running(const struct net_device *dev)
|
|
{
|
|
return test_bit(__LINK_STATE_START, &dev->state);
|
|
}
|
|
|
|
|
|
/* Use this variant when it is known for sure that it
|
|
* is executing from interrupt context.
|
|
*/
|
|
static inline void dev_kfree_skb_irq(struct sk_buff *skb)
|
|
{
|
|
if (atomic_dec_and_test(&skb->users)) {
|
|
struct softnet_data *sd;
|
|
unsigned long flags;
|
|
|
|
local_irq_save(flags);
|
|
sd = &__get_cpu_var(softnet_data);
|
|
skb->next = sd->completion_queue;
|
|
sd->completion_queue = skb;
|
|
raise_softirq_irqoff(NET_TX_SOFTIRQ);
|
|
local_irq_restore(flags);
|
|
}
|
|
}
|
|
|
|
/* 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(unsigned int cmd, void __user *);
|
|
extern int dev_ethtool(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_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 void dev_init(void);
|
|
|
|
extern int netdev_budget;
|
|
|
|
/* Called by rtnetlink.c:rtnl_unlock() */
|
|
extern void netdev_run_todo(void);
|
|
|
|
static inline void dev_put(struct net_device *dev)
|
|
{
|
|
atomic_dec(&dev->refcnt);
|
|
}
|
|
|
|
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);
|
|
|
|
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);
|
|
|
|
static inline void netif_dormant_on(struct net_device *dev)
|
|
{
|
|
if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
|
|
linkwatch_fire_event(dev);
|
|
}
|
|
|
|
static inline void netif_dormant_off(struct net_device *dev)
|
|
{
|
|
if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
|
|
linkwatch_fire_event(dev);
|
|
}
|
|
|
|
static inline int netif_dormant(const struct net_device *dev)
|
|
{
|
|
return test_bit(__LINK_STATE_DORMANT, &dev->state);
|
|
}
|
|
|
|
|
|
static inline int netif_oper_up(const struct net_device *dev) {
|
|
return (dev->operstate == IF_OPER_UP ||
|
|
dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
|
|
}
|
|
|
|
/* Hot-plugging. */
|
|
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 */
|
|
static inline int __netif_rx_schedule_prep(struct net_device *dev)
|
|
{
|
|
return !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
|
|
}
|
|
|
|
/* Test if receive needs to be scheduled but only if up */
|
|
static inline int netif_rx_schedule_prep(struct net_device *dev)
|
|
{
|
|
return netif_running(dev) && __netif_rx_schedule_prep(dev);
|
|
}
|
|
|
|
/* Add interface to tail of rx poll list. This assumes that _prep has
|
|
* already been called and returned 1.
|
|
*/
|
|
|
|
extern void __netif_rx_schedule(struct net_device *dev);
|
|
|
|
/* Try to reschedule poll. Called by irq handler. */
|
|
|
|
static inline void netif_rx_schedule(struct net_device *dev)
|
|
{
|
|
if (netif_rx_schedule_prep(dev))
|
|
__netif_rx_schedule(dev);
|
|
}
|
|
|
|
/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
|
|
* Do not inline this?
|
|
*/
|
|
static inline int netif_rx_reschedule(struct net_device *dev, int undo)
|
|
{
|
|
if (netif_rx_schedule_prep(dev)) {
|
|
unsigned long flags;
|
|
|
|
dev->quota += undo;
|
|
|
|
local_irq_save(flags);
|
|
list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
|
|
__raise_softirq_irqoff(NET_RX_SOFTIRQ);
|
|
local_irq_restore(flags);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* 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)
|
|
{
|
|
unsigned long flags;
|
|
|
|
local_irq_save(flags);
|
|
BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
|
|
list_del(&dev->poll_list);
|
|
smp_mb__before_clear_bit();
|
|
clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
static inline void netif_poll_disable(struct net_device *dev)
|
|
{
|
|
while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state))
|
|
/* No hurry. */
|
|
schedule_timeout_interruptible(1);
|
|
}
|
|
|
|
static inline void netif_poll_enable(struct net_device *dev)
|
|
{
|
|
clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
|
|
}
|
|
|
|
/* 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)
|
|
{
|
|
BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
|
|
list_del(&dev->poll_list);
|
|
smp_mb__before_clear_bit();
|
|
clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
|
|
}
|
|
|
|
static inline void netif_tx_lock(struct net_device *dev)
|
|
{
|
|
spin_lock(&dev->_xmit_lock);
|
|
dev->xmit_lock_owner = 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);
|
|
}
|
|
|
|
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(int sizeof_priv, const char *name,
|
|
void (*setup)(struct net_device *));
|
|
extern int register_netdev(struct net_device *dev);
|
|
extern void unregister_netdev(struct net_device *dev);
|
|
/* Functions used for multicast support */
|
|
extern void dev_mc_upload(struct net_device *dev);
|
|
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 void dev_mc_discard(struct net_device *dev);
|
|
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(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);
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extern int skb_checksum_help(struct sk_buff *skb);
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extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
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#ifdef CONFIG_BUG
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extern void netdev_rx_csum_fault(struct net_device *dev);
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#else
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static inline void netdev_rx_csum_fault(struct net_device *dev)
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{
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}
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#endif
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/* rx skb timestamps */
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extern void net_enable_timestamp(void);
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extern void net_disable_timestamp(void);
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#ifdef CONFIG_PROC_FS
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extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
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extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
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extern void dev_seq_stop(struct seq_file *seq, void *v);
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#endif
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extern void linkwatch_run_queue(void);
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static inline int net_gso_ok(int features, int gso_type)
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{
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int feature = gso_type << NETIF_F_GSO_SHIFT;
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return (features & feature) == feature;
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}
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static inline int skb_gso_ok(struct sk_buff *skb, int features)
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{
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return net_gso_ok(features, skb_shinfo(skb)->gso_type);
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}
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static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
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{
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return skb_is_gso(skb) &&
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(!skb_gso_ok(skb, dev->features) ||
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unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
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}
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/* On bonding slaves other than the currently active slave, suppress
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* duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
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* ARP on active-backup slaves with arp_validate enabled.
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*/
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static inline int skb_bond_should_drop(struct sk_buff *skb)
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{
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struct net_device *dev = skb->dev;
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struct net_device *master = dev->master;
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|
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if (master &&
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(dev->priv_flags & IFF_SLAVE_INACTIVE)) {
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if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
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skb->protocol == __constant_htons(ETH_P_ARP))
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return 0;
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|
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if (master->priv_flags & IFF_MASTER_ALB) {
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if (skb->pkt_type != PACKET_BROADCAST &&
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skb->pkt_type != PACKET_MULTICAST)
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return 0;
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}
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if (master->priv_flags & IFF_MASTER_8023AD &&
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|
skb->protocol == __constant_htons(ETH_P_SLOW))
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return 0;
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|
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return 1;
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}
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return 0;
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}
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#endif /* __KERNEL__ */
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#endif /* _LINUX_DEV_H */
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