tokenring: delete all remaining driver support

This represents the mass deletion of the of the tokenring support.

It gets rid of:
  - the net/tr.c which the drivers depended on
  - the drivers/net component
  - the Kbuild infrastructure around it
  - any tokenring related CONFIG_ settings in any defconfigs
  - the tokenring headers in the include/linux dir
  - the firmware associated with the tokenring drivers.
  - any associated token ring documentation.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

1 files changed, 0 insertions, 669 deletions

diff --git a/net/802/tr.c b/net/802/tr.c
deleted file mode 100644
index 175243b..0000000
--- a/net/802/tr.c
+++ /dev/null
@@ -1,669 +0,0 @@
-/*
- * NET3:	Token ring device handling subroutines
- *
- *		This program is free software; you can redistribute it and/or
- *		modify it under the terms of the GNU General Public License
- *		as published by the Free Software Foundation; either version
- *		2 of the License, or (at your option) any later version.
- *
- * Fixes:       3 Feb 97 Paul Norton <pnorton@cts.com> Minor routing fixes.
- *              Added rif table to /proc/net/tr_rif and rif timeout to
- *              /proc/sys/net/token-ring/rif_timeout.
- *              22 Jun 98 Paul Norton <p.norton@computer.org> Rearranged
- *              tr_header and tr_type_trans to handle passing IPX SNAP and
- *              802.2 through the correct layers. Eliminated tr_reformat.
- *
- */
-
-#include <asm/uaccess.h>
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/jiffies.h>
-#include <linux/string.h>
-#include <linux/mm.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/trdevice.h>
-#include <linux/skbuff.h>
-#include <linux/errno.h>
-#include <linux/timer.h>
-#include <linux/net.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
-#include <linux/init.h>
-#include <linux/sysctl.h>
-#include <linux/slab.h>
-#include <net/arp.h>
-#include <net/net_namespace.h>
-
-static void tr_add_rif_info(struct trh_hdr *trh, struct net_device *dev);
-static void rif_check_expire(unsigned long dummy);
-
-#define TR_SR_DEBUG 0
-
-/*
- *	Each RIF entry we learn is kept this way
- */
-
-struct rif_cache {
-	unsigned char addr[TR_ALEN];
-	int iface;
-	__be16 rcf;
-	__be16 rseg[8];
-	struct rif_cache *next;
-	unsigned long last_used;
-	unsigned char local_ring;
-};
-
-#define RIF_TABLE_SIZE 32
-
-/*
- *	We hash the RIF cache 32 ways. We do after all have to look it
- *	up a lot.
- */
-
-static struct rif_cache *rif_table[RIF_TABLE_SIZE];
-
-static DEFINE_SPINLOCK(rif_lock);
-
-
-/*
- *	Garbage disposal timer.
- */
-
-static struct timer_list rif_timer;
-
-static int sysctl_tr_rif_timeout = 60*10*HZ;
-
-static inline unsigned long rif_hash(const unsigned char *addr)
-{
-	unsigned long x;
-
-	x = addr[0];
-	x = (x << 2) ^ addr[1];
-	x = (x << 2) ^ addr[2];
-	x = (x << 2) ^ addr[3];
-	x = (x << 2) ^ addr[4];
-	x = (x << 2) ^ addr[5];
-
-	x ^= x >> 8;
-
-	return x & (RIF_TABLE_SIZE - 1);
-}
-
-/*
- *	Put the headers on a token ring packet. Token ring source routing
- *	makes this a little more exciting than on ethernet.
- */
-
-static int tr_header(struct sk_buff *skb, struct net_device *dev,
-		     unsigned short type,
-		     const void *daddr, const void *saddr, unsigned int len)
-{
-	struct trh_hdr *trh;
-	int hdr_len;
-
-	/*
-	 * Add the 802.2 SNAP header if IP as the IPv4/IPv6 code calls
-	 * dev->hard_header directly.
-	 */
-	if (type == ETH_P_IP || type == ETH_P_IPV6 || type == ETH_P_ARP)
-	{
-		struct trllc *trllc;
-
-		hdr_len = sizeof(struct trh_hdr) + sizeof(struct trllc);
-		trh = (struct trh_hdr *)skb_push(skb, hdr_len);
-		trllc = (struct trllc *)(trh+1);
-		trllc->dsap = trllc->ssap = EXTENDED_SAP;
-		trllc->llc = UI_CMD;
-		trllc->protid[0] = trllc->protid[1] = trllc->protid[2] = 0x00;
-		trllc->ethertype = htons(type);
-	}
-	else
-	{
-		hdr_len = sizeof(struct trh_hdr);
-		trh = (struct trh_hdr *)skb_push(skb, hdr_len);
-	}
-
-	trh->ac=AC;
-	trh->fc=LLC_FRAME;
-
-	if(saddr)
-		memcpy(trh->saddr,saddr,dev->addr_len);
-	else
-		memcpy(trh->saddr,dev->dev_addr,dev->addr_len);
-
-	/*
-	 *	Build the destination and then source route the frame
-	 */
-
-	if(daddr)
-	{
-		memcpy(trh->daddr,daddr,dev->addr_len);
-		tr_source_route(skb, trh, dev);
-		return hdr_len;
-	}
-
-	return -hdr_len;
-}
-
-/*
- *	A neighbour discovery of some species (eg arp) has completed. We
- *	can now send the packet.
- */
-
-static int tr_rebuild_header(struct sk_buff *skb)
-{
-	struct trh_hdr *trh=(struct trh_hdr *)skb->data;
-	struct trllc *trllc=(struct trllc *)(skb->data+sizeof(struct trh_hdr));
-	struct net_device *dev = skb->dev;
-
-	/*
-	 *	FIXME: We don't yet support IPv6 over token rings
-	 */
-
-	if(trllc->ethertype != htons(ETH_P_IP)) {
-		printk("tr_rebuild_header: Don't know how to resolve type %04X addresses ?\n", ntohs(trllc->ethertype));
-		return 0;
-	}
-
-#ifdef CONFIG_INET
-	if(arp_find(trh->daddr, skb)) {
-			return 1;
-	}
-	else
-#endif
-	{
-		tr_source_route(skb,trh,dev);
-		return 0;
-	}
-}
-
-/*
- *	Some of this is a bit hackish. We intercept RIF information
- *	used for source routing. We also grab IP directly and don't feed
- *	it via SNAP.
- */
-
-__be16 tr_type_trans(struct sk_buff *skb, struct net_device *dev)
-{
-
-	struct trh_hdr *trh;
-	struct trllc *trllc;
-	unsigned int riflen=0;
-
-	skb->dev = dev;
-	skb_reset_mac_header(skb);
-	trh = tr_hdr(skb);
-
-	if(trh->saddr[0] & TR_RII)
-		riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8;
-
-	trllc = (struct trllc *)(skb->data+sizeof(struct trh_hdr)-TR_MAXRIFLEN+riflen);
-
-	skb_pull(skb,sizeof(struct trh_hdr)-TR_MAXRIFLEN+riflen);
-
-	if(*trh->daddr & 0x80)
-	{
-		if(!memcmp(trh->daddr,dev->broadcast,TR_ALEN))
-			skb->pkt_type=PACKET_BROADCAST;
-		else
-			skb->pkt_type=PACKET_MULTICAST;
-	}
-	else if ( (trh->daddr[0] & 0x01) && (trh->daddr[1] & 0x00) && (trh->daddr[2] & 0x5E))
-	{
-		skb->pkt_type=PACKET_MULTICAST;
-	}
-	else if(dev->flags & IFF_PROMISC)
-	{
-		if(memcmp(trh->daddr, dev->dev_addr, TR_ALEN))
-			skb->pkt_type=PACKET_OTHERHOST;
-	}
-
-	if ((skb->pkt_type != PACKET_BROADCAST) &&
-	    (skb->pkt_type != PACKET_MULTICAST))
-		tr_add_rif_info(trh,dev) ;
-
-	/*
-	 * Strip the SNAP header from ARP packets since we don't
-	 * pass them through to the 802.2/SNAP layers.
-	 */
-
-	if (trllc->dsap == EXTENDED_SAP &&
-	    (trllc->ethertype == htons(ETH_P_IP) ||
-	     trllc->ethertype == htons(ETH_P_IPV6) ||
-	     trllc->ethertype == htons(ETH_P_ARP)))
-	{
-		skb_pull(skb, sizeof(struct trllc));
-		return trllc->ethertype;
-	}
-
-	return htons(ETH_P_TR_802_2);
-}
-
-/*
- *	We try to do source routing...
- */
-
-void tr_source_route(struct sk_buff *skb,struct trh_hdr *trh,
-		     struct net_device *dev)
-{
-	int slack;
-	unsigned int hash;
-	struct rif_cache *entry;
-	unsigned char *olddata;
-	unsigned long flags;
-	static const unsigned char mcast_func_addr[]
-		= {0xC0,0x00,0x00,0x04,0x00,0x00};
-
-	spin_lock_irqsave(&rif_lock, flags);
-
-	/*
-	 *	Broadcasts are single route as stated in RFC 1042
-	 */
-	if( (!memcmp(&(trh->daddr[0]),&(dev->broadcast[0]),TR_ALEN)) ||
-	    (!memcmp(&(trh->daddr[0]),&(mcast_func_addr[0]), TR_ALEN))  )
-	{
-		trh->rcf=htons((((sizeof(trh->rcf)) << 8) & TR_RCF_LEN_MASK)
-			       | TR_RCF_FRAME2K | TR_RCF_LIMITED_BROADCAST);
-		trh->saddr[0]|=TR_RII;
-	}
-	else
-	{
-		hash = rif_hash(trh->daddr);
-		/*
-		 *	Walk the hash table and look for an entry
-		 */
-		for(entry=rif_table[hash];entry && memcmp(&(entry->addr[0]),&(trh->daddr[0]),TR_ALEN);entry=entry->next);
-
-		/*
-		 *	If we found an entry we can route the frame.
-		 */
-		if(entry)
-		{
-#if TR_SR_DEBUG
-printk("source routing for %pM\n", trh->daddr);
-#endif
-			if(!entry->local_ring && (ntohs(entry->rcf) & TR_RCF_LEN_MASK) >> 8)
-			{
-				trh->rcf=entry->rcf;
-				memcpy(&trh->rseg[0],&entry->rseg[0],8*sizeof(unsigned short));
-				trh->rcf^=htons(TR_RCF_DIR_BIT);
-				trh->rcf&=htons(0x1fff);	/* Issam Chehab <ichehab@madge1.demon.co.uk> */
-
-				trh->saddr[0]|=TR_RII;
-#if TR_SR_DEBUG
-				printk("entry found with rcf %04x\n", entry->rcf);
-			}
-			else
-			{
-				printk("entry found but without rcf length, local=%02x\n", entry->local_ring);
-#endif
-			}
-			entry->last_used=jiffies;
-		}
-		else
-		{
-			/*
-			 *	Without the information we simply have to shout
-			 *	on the wire. The replies should rapidly clean this
-			 *	situation up.
-			 */
-			trh->rcf=htons((((sizeof(trh->rcf)) << 8) & TR_RCF_LEN_MASK)
-				       | TR_RCF_FRAME2K | TR_RCF_LIMITED_BROADCAST);
-			trh->saddr[0]|=TR_RII;
-#if TR_SR_DEBUG
-			printk("no entry in rif table found - broadcasting frame\n");
-#endif
-		}
-	}
-
-	/* Compress the RIF here so we don't have to do it in the driver(s) */
-	if (!(trh->saddr[0] & 0x80))
-		slack = 18;
-	else
-		slack = 18 - ((ntohs(trh->rcf) & TR_RCF_LEN_MASK)>>8);
-	olddata = skb->data;
-	spin_unlock_irqrestore(&rif_lock, flags);
-
-	skb_pull(skb, slack);
-	memmove(skb->data, olddata, sizeof(struct trh_hdr) - slack);
-}
-
-/*
- *	We have learned some new RIF information for our source
- *	routing.
- */
-
-static void tr_add_rif_info(struct trh_hdr *trh, struct net_device *dev)
-{
-	unsigned int hash, rii_p = 0;
-	unsigned long flags;
-	struct rif_cache *entry;
-	unsigned char saddr0;
-
-	spin_lock_irqsave(&rif_lock, flags);
-	saddr0 = trh->saddr[0];
-
-	/*
-	 *	Firstly see if the entry exists
-	 */
-
-	if(trh->saddr[0] & TR_RII)
-	{
-		trh->saddr[0]&=0x7f;
-		if (((ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8) > 2)
-		{
-			rii_p = 1;
-		}
-	}
-
-	hash = rif_hash(trh->saddr);
-	for(entry=rif_table[hash];entry && memcmp(&(entry->addr[0]),&(trh->saddr[0]),TR_ALEN);entry=entry->next);
-
-	if(entry==NULL)
-	{
-#if TR_SR_DEBUG
-		printk("adding rif_entry: addr:%pM rcf:%04X\n",
-		       trh->saddr, ntohs(trh->rcf));
-#endif
-		/*
-		 *	Allocate our new entry. A failure to allocate loses
-		 *	use the information. This is harmless.
-		 *
-		 *	FIXME: We ought to keep some kind of cache size
-		 *	limiting and adjust the timers to suit.
-		 */
-		entry=kmalloc(sizeof(struct rif_cache),GFP_ATOMIC);
-
-		if(!entry)
-		{
-			printk(KERN_DEBUG "tr.c: Couldn't malloc rif cache entry !\n");
-			spin_unlock_irqrestore(&rif_lock, flags);
-			return;
-		}
-
-		memcpy(&(entry->addr[0]),&(trh->saddr[0]),TR_ALEN);
-		entry->iface = dev->ifindex;
-		entry->next=rif_table[hash];
-		entry->last_used=jiffies;
-		rif_table[hash]=entry;
-
-		if (rii_p)
-		{
-			entry->rcf = trh->rcf & htons((unsigned short)~TR_RCF_BROADCAST_MASK);
-			memcpy(&(entry->rseg[0]),&(trh->rseg[0]),8*sizeof(unsigned short));
-			entry->local_ring = 0;
-		}
-		else
-		{
-			entry->local_ring = 1;
-		}
-	}
-	else	/* Y. Tahara added */
-	{
-		/*
-		 *	Update existing entries
-		 */
-		if (!entry->local_ring)
-		    if (entry->rcf != (trh->rcf & htons((unsigned short)~TR_RCF_BROADCAST_MASK)) &&
-			 !(trh->rcf & htons(TR_RCF_BROADCAST_MASK)))
-		    {
-#if TR_SR_DEBUG
-printk("updating rif_entry: addr:%pM rcf:%04X\n",
-		trh->saddr, ntohs(trh->rcf));
-#endif
-			    entry->rcf = trh->rcf & htons((unsigned short)~TR_RCF_BROADCAST_MASK);
-			    memcpy(&(entry->rseg[0]),&(trh->rseg[0]),8*sizeof(unsigned short));
-		    }
-		entry->last_used=jiffies;
-	}
-	trh->saddr[0]=saddr0; /* put the routing indicator back for tcpdump */
-	spin_unlock_irqrestore(&rif_lock, flags);
-}
-
-/*
- *	Scan the cache with a timer and see what we need to throw out.
- */
-
-static void rif_check_expire(unsigned long dummy)
-{
-	int i;
-	unsigned long flags, next_interval = jiffies + sysctl_tr_rif_timeout/2;
-
-	spin_lock_irqsave(&rif_lock, flags);
-
-	for(i =0; i < RIF_TABLE_SIZE; i++) {
-		struct rif_cache *entry, **pentry;
-
-		pentry = rif_table+i;
-		while((entry=*pentry) != NULL) {
-			unsigned long expires
-				= entry->last_used + sysctl_tr_rif_timeout;
-
-			if (time_before_eq(expires, jiffies)) {
-				*pentry = entry->next;
-				kfree(entry);
-			} else {
-				pentry = &entry->next;
-
-				if (time_before(expires, next_interval))
-					next_interval = expires;
-			}
-		}
-	}
-
-	spin_unlock_irqrestore(&rif_lock, flags);
-
-	mod_timer(&rif_timer, next_interval);
-
-}
-
-/*
- *	Generate the /proc/net information for the token ring RIF
- *	routing.
- */
-
-#ifdef CONFIG_PROC_FS
-
-static struct rif_cache *rif_get_idx(loff_t pos)
-{
-	int i;
-	struct rif_cache *entry;
-	loff_t off = 0;
-
-	for(i = 0; i < RIF_TABLE_SIZE; i++)
-		for(entry = rif_table[i]; entry; entry = entry->next) {
-			if (off == pos)
-				return entry;
-			++off;
-		}
-
-	return NULL;
-}
-
-static void *rif_seq_start(struct seq_file *seq, loff_t *pos)
-	__acquires(&rif_lock)
-{
-	spin_lock_irq(&rif_lock);
-
-	return *pos ? rif_get_idx(*pos - 1) : SEQ_START_TOKEN;
-}
-
-static void *rif_seq_next(struct seq_file *seq, void *v, loff_t *pos)
-{
-	int i;
-	struct rif_cache *ent = v;
-
-	++*pos;
-
-	if (v == SEQ_START_TOKEN) {
-		i = -1;
-		goto scan;
-	}
-
-	if (ent->next)
-		return ent->next;
-
-	i = rif_hash(ent->addr);
- scan:
-	while (++i < RIF_TABLE_SIZE) {
-		if ((ent = rif_table[i]) != NULL)
-			return ent;
-	}
-	return NULL;
-}
-
-static void rif_seq_stop(struct seq_file *seq, void *v)
-	__releases(&rif_lock)
-{
-	spin_unlock_irq(&rif_lock);
-}
-
-static int rif_seq_show(struct seq_file *seq, void *v)
-{
-	int j, rcf_len, segment, brdgnmb;
-	struct rif_cache *entry = v;
-
-	if (v == SEQ_START_TOKEN)
-		seq_puts(seq,
-		     "if     TR address       TTL   rcf   routing segments\n");
-	else {
-		struct net_device *dev = dev_get_by_index(&init_net, entry->iface);
-		long ttl = (long) (entry->last_used + sysctl_tr_rif_timeout)
-				- (long) jiffies;
-
-		seq_printf(seq, "%s %pM %7li ",
-			   dev?dev->name:"?",
-			   entry->addr,
-			   ttl/HZ);
-
-			if (entry->local_ring)
-				seq_puts(seq, "local\n");
-			else {
-
-				seq_printf(seq, "%04X", ntohs(entry->rcf));
-				rcf_len = ((ntohs(entry->rcf) & TR_RCF_LEN_MASK)>>8)-2;
-				if (rcf_len)
-					rcf_len >>= 1;
-				for(j = 1; j < rcf_len; j++) {
-					if(j==1) {
-						segment=ntohs(entry->rseg[j-1])>>4;
-						seq_printf(seq,"  %03X",segment);
-					}
-
-					segment=ntohs(entry->rseg[j])>>4;
-					brdgnmb=ntohs(entry->rseg[j-1])&0x00f;
-					seq_printf(seq,"-%01X-%03X",brdgnmb,segment);
-				}
-				seq_putc(seq, '\n');
-			}
-
-		if (dev)
-			dev_put(dev);
-		}
-	return 0;
-}
-
-
-static const struct seq_operations rif_seq_ops = {
-	.start = rif_seq_start,
-	.next  = rif_seq_next,
-	.stop  = rif_seq_stop,
-	.show  = rif_seq_show,
-};
-
-static int rif_seq_open(struct inode *inode, struct file *file)
-{
-	return seq_open(file, &rif_seq_ops);
-}
-
-static const struct file_operations rif_seq_fops = {
-	.owner	 = THIS_MODULE,
-	.open    = rif_seq_open,
-	.read    = seq_read,
-	.llseek  = seq_lseek,
-	.release = seq_release,
-};
-
-#endif
-
-static const struct header_ops tr_header_ops = {
-	.create = tr_header,
-	.rebuild= tr_rebuild_header,
-};
-
-static void tr_setup(struct net_device *dev)
-{
-	/*
-	 *	Configure and register
-	 */
-
-	dev->header_ops	= &tr_header_ops;
-
-	dev->hard_header_len	= TR_HLEN;
-	dev->mtu		= 2000;
-	dev->addr_len		= TR_ALEN;
-	dev->tx_queue_len	= 100;	/* Long queues on tr */
-
-	memset(dev->broadcast,0xFF, TR_ALEN);
-
-	/* New-style flags. */
-	dev->flags		= IFF_BROADCAST | IFF_MULTICAST ;
-}
-
-/**
- * alloc_trdev - Register token ring device
- * @sizeof_priv: Size of additional driver-private structure to be allocated
- *	for this token ring device
- *
- * Fill in the fields of the device structure with token ring-generic values.
- *
- * Constructs a new net device, complete with a private data area of
- * size @sizeof_priv.  A 32-byte (not bit) alignment is enforced for
- * this private data area.
- */
-struct net_device *alloc_trdev(int sizeof_priv)
-{
-	return alloc_netdev(sizeof_priv, "tr%d", tr_setup);
-}
-
-#ifdef CONFIG_SYSCTL
-static struct ctl_table tr_table[] = {
-	{
-		.procname	= "rif_timeout",
-		.data		= &sysctl_tr_rif_timeout,
-		.maxlen		= sizeof(int),
-		.mode		= 0644,
-		.proc_handler	= proc_dointvec
-	},
-	{ },
-};
-#endif
-
-/*
- *	Called during bootup.  We don't actually have to initialise
- *	too much for this.
- */
-
-static int __init rif_init(void)
-{
-	rif_timer.expires  = jiffies + sysctl_tr_rif_timeout;
-	setup_timer(&rif_timer, rif_check_expire, 0);
-	add_timer(&rif_timer);
-#ifdef CONFIG_SYSCTL
-	register_net_sysctl(&init_net, "net/token-ring", tr_table);
-#endif
-	proc_net_fops_create(&init_net, "tr_rif", S_IRUGO, &rif_seq_fops);
-	return 0;
-}
-
-module_init(rif_init);
-
-EXPORT_SYMBOL(tr_type_trans);
-EXPORT_SYMBOL(alloc_trdev);
-
-MODULE_LICENSE("GPL");