cd354f1ae7
After Al Viro (finally) succeeded in removing the sched.h #include in module.h recently, it makes sense again to remove other superfluous sched.h includes. There are quite a lot of files which include it but don't actually need anything defined in there. Presumably these includes were once needed for macros that used to live in sched.h, but moved to other header files in the course of cleaning it up. To ease the pain, this time I did not fiddle with any header files and only removed #includes from .c-files, which tend to cause less trouble. Compile tested against 2.6.20-rc2 and 2.6.20-rc2-mm2 (with offsets) on alpha, arm, i386, ia64, mips, powerpc, and x86_64 with allnoconfig, defconfig, allmodconfig, and allyesconfig as well as a few randconfigs on x86_64 and all configs in arch/arm/configs on arm. I also checked that no new warnings were introduced by the patch (actually, some warnings are removed that were emitted by unnecessarily included header files). Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
335 lines
9.1 KiB
C
335 lines
9.1 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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* Ethernet-type device handling.
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*
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* Version: @(#)eth.c 1.0.7 05/25/93
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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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* Mark Evans, <evansmp@uhura.aston.ac.uk>
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* Florian La Roche, <rzsfl@rz.uni-sb.de>
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* Alan Cox, <gw4pts@gw4pts.ampr.org>
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*
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* Fixes:
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* Mr Linux : Arp problems
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* Alan Cox : Generic queue tidyup (very tiny here)
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* Alan Cox : eth_header ntohs should be htons
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* Alan Cox : eth_rebuild_header missing an htons and
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* minor other things.
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* Tegge : Arp bug fixes.
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* Florian : Removed many unnecessary functions, code cleanup
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* and changes for new arp and skbuff.
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* Alan Cox : Redid header building to reflect new format.
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* Alan Cox : ARP only when compiled with CONFIG_INET
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* Greg Page : 802.2 and SNAP stuff.
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* Alan Cox : MAC layer pointers/new format.
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* Paul Gortmaker : eth_copy_and_sum shouldn't csum padding.
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* Alan Cox : Protect against forwarding explosions with
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* older network drivers and IFF_ALLMULTI.
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* Christer Weinigel : Better rebuild header message.
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* Andrew Morton : 26Feb01: kill ether_setup() - use netdev_boot_setup().
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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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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/mm.h>
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#include <linux/socket.h>
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#include <linux/in.h>
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#include <linux/inet.h>
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#include <linux/ip.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/if_ether.h>
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#include <net/dst.h>
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#include <net/arp.h>
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#include <net/sock.h>
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#include <net/ipv6.h>
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#include <net/ip.h>
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#include <asm/uaccess.h>
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#include <asm/system.h>
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__setup("ether=", netdev_boot_setup);
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/**
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* eth_header - create the Ethernet header
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* @skb: buffer to alter
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* @dev: source device
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* @type: Ethernet type field
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* @daddr: destination address (NULL leave destination address)
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* @saddr: source address (NULL use device source address)
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* @len: packet length (<= skb->len)
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*
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*
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* Set the protocol type. For a packet of type ETH_P_802_3 we put the length
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* in here instead. It is up to the 802.2 layer to carry protocol information.
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*/
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int eth_header(struct sk_buff *skb, struct net_device *dev, unsigned short type,
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void *daddr, void *saddr, unsigned len)
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{
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struct ethhdr *eth = (struct ethhdr *)skb_push(skb, ETH_HLEN);
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if (type != ETH_P_802_3)
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eth->h_proto = htons(type);
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else
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eth->h_proto = htons(len);
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/*
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* Set the source hardware address.
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*/
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if (!saddr)
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saddr = dev->dev_addr;
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memcpy(eth->h_source, saddr, dev->addr_len);
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if (daddr) {
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memcpy(eth->h_dest, daddr, dev->addr_len);
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return ETH_HLEN;
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}
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/*
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* Anyway, the loopback-device should never use this function...
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*/
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if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) {
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memset(eth->h_dest, 0, dev->addr_len);
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return ETH_HLEN;
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}
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return -ETH_HLEN;
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}
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/**
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* eth_rebuild_header- rebuild the Ethernet MAC header.
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* @skb: socket buffer to update
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*
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* This is called after an ARP or IPV6 ndisc it's resolution on this
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* sk_buff. We now let protocol (ARP) fill in the other fields.
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*
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* This routine CANNOT use cached dst->neigh!
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* Really, it is used only when dst->neigh is wrong.
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*/
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int eth_rebuild_header(struct sk_buff *skb)
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{
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struct ethhdr *eth = (struct ethhdr *)skb->data;
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struct net_device *dev = skb->dev;
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switch (eth->h_proto) {
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#ifdef CONFIG_INET
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case __constant_htons(ETH_P_IP):
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return arp_find(eth->h_dest, skb);
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#endif
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default:
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printk(KERN_DEBUG
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"%s: unable to resolve type %X addresses.\n",
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dev->name, (int)eth->h_proto);
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memcpy(eth->h_source, dev->dev_addr, dev->addr_len);
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break;
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}
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return 0;
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}
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/**
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* eth_type_trans - determine the packet's protocol ID.
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* @skb: received socket data
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* @dev: receiving network device
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*
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* The rule here is that we
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* assume 802.3 if the type field is short enough to be a length.
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* This is normal practice and works for any 'now in use' protocol.
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*/
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__be16 eth_type_trans(struct sk_buff *skb, struct net_device *dev)
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{
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struct ethhdr *eth;
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unsigned char *rawp;
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skb->mac.raw = skb->data;
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skb_pull(skb, ETH_HLEN);
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eth = eth_hdr(skb);
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if (is_multicast_ether_addr(eth->h_dest)) {
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if (!compare_ether_addr(eth->h_dest, dev->broadcast))
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skb->pkt_type = PACKET_BROADCAST;
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else
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skb->pkt_type = PACKET_MULTICAST;
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}
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/*
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* This ALLMULTI check should be redundant by 1.4
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* so don't forget to remove it.
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*
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* Seems, you forgot to remove it. All silly devices
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* seems to set IFF_PROMISC.
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*/
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else if (1 /*dev->flags&IFF_PROMISC */ ) {
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if (unlikely(compare_ether_addr(eth->h_dest, dev->dev_addr)))
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skb->pkt_type = PACKET_OTHERHOST;
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}
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if (ntohs(eth->h_proto) >= 1536)
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return eth->h_proto;
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rawp = skb->data;
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/*
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* This is a magic hack to spot IPX packets. Older Novell breaks
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* the protocol design and runs IPX over 802.3 without an 802.2 LLC
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* layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
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* won't work for fault tolerant netware but does for the rest.
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*/
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if (*(unsigned short *)rawp == 0xFFFF)
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return htons(ETH_P_802_3);
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/*
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* Real 802.2 LLC
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*/
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return htons(ETH_P_802_2);
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}
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EXPORT_SYMBOL(eth_type_trans);
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/**
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* eth_header_parse - extract hardware address from packet
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* @skb: packet to extract header from
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* @haddr: destination buffer
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*/
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static int eth_header_parse(struct sk_buff *skb, unsigned char *haddr)
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{
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struct ethhdr *eth = eth_hdr(skb);
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memcpy(haddr, eth->h_source, ETH_ALEN);
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return ETH_ALEN;
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}
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/**
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* eth_header_cache - fill cache entry from neighbour
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* @neigh: source neighbour
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* @hh: destination cache entry
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* Create an Ethernet header template from the neighbour.
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*/
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int eth_header_cache(struct neighbour *neigh, struct hh_cache *hh)
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{
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__be16 type = hh->hh_type;
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struct ethhdr *eth;
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struct net_device *dev = neigh->dev;
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eth = (struct ethhdr *)
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(((u8 *) hh->hh_data) + (HH_DATA_OFF(sizeof(*eth))));
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if (type == __constant_htons(ETH_P_802_3))
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return -1;
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eth->h_proto = type;
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memcpy(eth->h_source, dev->dev_addr, dev->addr_len);
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memcpy(eth->h_dest, neigh->ha, dev->addr_len);
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hh->hh_len = ETH_HLEN;
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return 0;
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}
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/**
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* eth_header_cache_update - update cache entry
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* @hh: destination cache entry
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* @dev: network device
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* @haddr: new hardware address
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*
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* Called by Address Resolution module to notify changes in address.
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*/
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void eth_header_cache_update(struct hh_cache *hh, struct net_device *dev,
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unsigned char *haddr)
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{
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memcpy(((u8 *) hh->hh_data) + HH_DATA_OFF(sizeof(struct ethhdr)),
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haddr, dev->addr_len);
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}
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/**
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* eth_mac_addr - set new Ethernet hardware address
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* @dev: network device
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* @p: socket address
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* Change hardware address of device.
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*
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* This doesn't change hardware matching, so needs to be overridden
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* for most real devices.
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*/
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static int eth_mac_addr(struct net_device *dev, void *p)
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{
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struct sockaddr *addr = p;
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if (netif_running(dev))
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return -EBUSY;
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memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
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return 0;
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}
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/**
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* eth_change_mtu - set new MTU size
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* @dev: network device
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* @new_mtu: new Maximum Transfer Unit
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*
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* Allow changing MTU size. Needs to be overridden for devices
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* supporting jumbo frames.
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*/
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static int eth_change_mtu(struct net_device *dev, int new_mtu)
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{
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if (new_mtu < 68 || new_mtu > ETH_DATA_LEN)
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return -EINVAL;
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dev->mtu = new_mtu;
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return 0;
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}
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/**
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* ether_setup - setup Ethernet network device
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* @dev: network device
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* Fill in the fields of the device structure with Ethernet-generic values.
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*/
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void ether_setup(struct net_device *dev)
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{
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dev->change_mtu = eth_change_mtu;
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dev->hard_header = eth_header;
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dev->rebuild_header = eth_rebuild_header;
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dev->set_mac_address = eth_mac_addr;
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dev->hard_header_cache = eth_header_cache;
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dev->header_cache_update= eth_header_cache_update;
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dev->hard_header_parse = eth_header_parse;
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dev->type = ARPHRD_ETHER;
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dev->hard_header_len = ETH_HLEN;
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dev->mtu = ETH_DATA_LEN;
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dev->addr_len = ETH_ALEN;
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dev->tx_queue_len = 1000; /* Ethernet wants good queues */
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dev->flags = IFF_BROADCAST|IFF_MULTICAST;
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memset(dev->broadcast, 0xFF, ETH_ALEN);
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}
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EXPORT_SYMBOL(ether_setup);
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/**
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* alloc_etherdev - Allocates and sets up an Ethernet device
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* @sizeof_priv: Size of additional driver-private structure to be allocated
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* for this Ethernet device
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*
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* Fill in the fields of the device structure with Ethernet-generic
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* values. Basically does everything except registering the device.
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*
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* Constructs a new net device, complete with a private data area of
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* size (sizeof_priv). A 32-byte (not bit) alignment is enforced for
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* this private data area.
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*/
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struct net_device *alloc_etherdev(int sizeof_priv)
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{
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return alloc_netdev(sizeof_priv, "eth%d", ether_setup);
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}
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EXPORT_SYMBOL(alloc_etherdev);
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