X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=net%2F802%2Ftr.c;h=f47ae289d83b142167ed971f315a28e757752020;hb=49a9072f29a1039f142ec98b44a72d7173651c02;hp=3bfb86260f27c1f981963bfe8b29cd60cf37ddbd;hpb=c6b3365391c626206f6789354794a81a010cb7a1;p=safe%2Fjmp%2Flinux-2.6 diff --git a/net/802/tr.c b/net/802/tr.c index 3bfb862..f47ae28 100644 --- a/net/802/tr.c +++ b/net/802/tr.c @@ -1,6 +1,6 @@ /* * 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 @@ -12,12 +12,11 @@ * 22 Jun 98 Paul Norton Rearranged * tr_header and tr_type_trans to handle passing IPX SNAP and * 802.2 through the correct layers. Eliminated tr_reformat. - * + * */ #include #include -#include #include #include #include @@ -36,7 +35,9 @@ #include #include #include +#include #include +#include static void tr_add_rif_info(struct trh_hdr *trh, struct net_device *dev); static void rif_check_expire(unsigned long dummy); @@ -46,13 +47,13 @@ static void rif_check_expire(unsigned long dummy); /* * Each RIF entry we learn is kept this way */ - -struct rif_cache_s { + +struct rif_cache { unsigned char addr[TR_ALEN]; int iface; __be16 rcf; __be16 rseg[8]; - struct rif_cache_s *next; + struct rif_cache *next; unsigned long last_used; unsigned char local_ring; }; @@ -63,8 +64,8 @@ struct rif_cache_s { * We hash the RIF cache 32 ways. We do after all have to look it * up a lot. */ - -static struct rif_cache_s *rif_table[RIF_TABLE_SIZE]; + +static struct rif_cache *rif_table[RIF_TABLE_SIZE]; static DEFINE_SPINLOCK(rif_lock); @@ -72,10 +73,10 @@ static DEFINE_SPINLOCK(rif_lock); /* * Garbage disposal timer. */ - + static struct timer_list rif_timer; -int sysctl_tr_rif_timeout = 60*10*HZ; +static int sysctl_tr_rif_timeout = 60*10*HZ; static inline unsigned long rif_hash(const unsigned char *addr) { @@ -97,16 +98,16 @@ static inline unsigned long rif_hash(const unsigned char *addr) * 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, - void *daddr, void *saddr, unsigned len) + const void *daddr, const void *saddr, unsigned len) { struct trh_hdr *trh; int hdr_len; - /* - * Add the 802.2 SNAP header if IP as the IPv4/IPv6 code calls + /* + * 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) @@ -124,7 +125,7 @@ static int tr_header(struct sk_buff *skb, struct net_device *dev, else { hdr_len = sizeof(struct trh_hdr); - trh = (struct trh_hdr *)skb_push(skb, hdr_len); + trh = (struct trh_hdr *)skb_push(skb, hdr_len); } trh->ac=AC; @@ -138,23 +139,23 @@ static int tr_header(struct sk_buff *skb, struct net_device *dev, /* * Build the destination and then source route the frame */ - - if(daddr) + + if(daddr) { memcpy(trh->daddr,daddr,dev->addr_len); - tr_source_route(skb,trh,dev); + 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) + +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)); @@ -163,9 +164,9 @@ static int tr_rebuild_header(struct sk_buff *skb) /* * 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",(unsigned int)htons(trllc->ethertype)); + printk("tr_rebuild_header: Don't know how to resolve type %04X addresses ?\n", ntohs(trllc->ethertype)); return 0; } @@ -173,39 +174,41 @@ static int tr_rebuild_header(struct sk_buff *skb) if(arp_find(trh->daddr, skb)) { return 1; } - else -#endif - { - tr_source_route(skb,trh,dev); + 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. */ - -unsigned short tr_type_trans(struct sk_buff *skb, struct net_device *dev) + +__be16 tr_type_trans(struct sk_buff *skb, struct net_device *dev) { - struct trh_hdr *trh=(struct trh_hdr *)skb->data; + struct trh_hdr *trh; struct trllc *trllc; unsigned riflen=0; - - skb->mac.raw = skb->data; - - if(trh->saddr[0] & TR_RII) + + 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(*trh->daddr & 0x80) { - if(!memcmp(trh->daddr,dev->broadcast,TR_ALEN)) + if(!memcmp(trh->daddr,dev->broadcast,TR_ALEN)) skb->pkt_type=PACKET_BROADCAST; else skb->pkt_type=PACKET_MULTICAST; @@ -214,7 +217,7 @@ unsigned short tr_type_trans(struct sk_buff *skb, struct net_device *dev) { skb->pkt_type=PACKET_MULTICAST; } - else if(dev->flags & IFF_PROMISC) + else if(dev->flags & IFF_PROMISC) { if(memcmp(trh->daddr, dev->dev_addr, TR_ALEN)) skb->pkt_type=PACKET_OTHERHOST; @@ -222,51 +225,53 @@ unsigned short tr_type_trans(struct sk_buff *skb, struct net_device *dev) if ((skb->pkt_type != PACKET_BROADCAST) && (skb->pkt_type != PACKET_MULTICAST)) - tr_add_rif_info(trh,dev) ; + tr_add_rif_info(trh,dev) ; /* - * Strip the SNAP header from ARP packets since we don't + * 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 == ntohs(ETH_P_IP) || - trllc->ethertype == ntohs(ETH_P_IPV6) || - trllc->ethertype == ntohs(ETH_P_ARP))) + (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 ntohs(ETH_P_802_2); + return htons(ETH_P_TR_802_2); } /* - * We try to do source routing... + * We try to do source routing... */ -void tr_source_route(struct sk_buff *skb,struct trh_hdr *trh,struct net_device *dev) +void tr_source_route(struct sk_buff *skb,struct trh_hdr *trh, + struct net_device *dev) { int slack; unsigned int hash; - struct rif_cache_s *entry; + struct rif_cache *entry; unsigned char *olddata; - static const unsigned char mcast_func_addr[] + unsigned long flags; + static const unsigned char mcast_func_addr[] = {0xC0,0x00,0x00,0x04,0x00,0x00}; - - spin_lock_bh(&rif_lock); + + spin_lock_irqsave(&rif_lock, flags); /* - * Broadcasts are single route as stated in RFC 1042 + * 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) + trh->rcf=htons((((sizeof(trh->rcf)) << 8) & TR_RCF_LEN_MASK) | TR_RCF_FRAME2K | TR_RCF_LIMITED_BROADCAST); trh->saddr[0]|=TR_RII; } - else + else { hash = rif_hash(trh->daddr); /* @@ -277,17 +282,16 @@ void tr_source_route(struct sk_buff *skb,struct trh_hdr *trh,struct net_device * /* * If we found an entry we can route the frame. */ - if(entry) + if(entry) { #if TR_SR_DEBUG -printk("source routing for %02X:%02X:%02X:%02X:%02X:%02X\n",trh->daddr[0], - trh->daddr[1],trh->daddr[2],trh->daddr[3],trh->daddr[4],trh->daddr[5]); +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(TR_RCF_DIR_BIT); trh->rcf&=htons(0x1fff); /* Issam Chehab */ trh->saddr[0]|=TR_RII; @@ -301,14 +305,14 @@ printk("source routing for %02X:%02X:%02X:%02X:%02X:%02X\n",trh->daddr[0], } entry->last_used=jiffies; } - else + 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) + 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 @@ -320,10 +324,10 @@ printk("source routing for %02X:%02X:%02X:%02X:%02X:%02X\n",trh->daddr[0], /* Compress the RIF here so we don't have to do it in the driver(s) */ if (!(trh->saddr[0] & 0x80)) slack = 18; - else + else slack = 18 - ((ntohs(trh->rcf) & TR_RCF_LEN_MASK)>>8); olddata = skb->data; - spin_unlock_bh(&rif_lock); + spin_unlock_irqrestore(&rif_lock, flags); skb_pull(skb, slack); memmove(skb->data, olddata, sizeof(struct trh_hdr) - slack); @@ -333,38 +337,38 @@ printk("source routing for %02X:%02X:%02X:%02X:%02X:%02X\n",trh->daddr[0], * 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; - struct rif_cache_s *entry; + unsigned long flags; + struct rif_cache *entry; + unsigned char saddr0; + spin_lock_irqsave(&rif_lock, flags); + saddr0 = trh->saddr[0]; - spin_lock_bh(&rif_lock); - /* * Firstly see if the entry exists */ - if(trh->saddr[0] & TR_RII) + 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(entry==NULL) { #if TR_SR_DEBUG -printk("adding rif_entry: addr:%02X:%02X:%02X:%02X:%02X:%02X rcf:%04X\n", - trh->saddr[0],trh->saddr[1],trh->saddr[2], - trh->saddr[3],trh->saddr[4],trh->saddr[5], - ntohs(trh->rcf)); + printk("adding rif_entry: addr:%pM rcf:%04X\n", + trh->saddr, ntohs(trh->rcf)); #endif /* * Allocate our new entry. A failure to allocate loses @@ -373,12 +377,12 @@ printk("adding rif_entry: addr:%02X:%02X:%02X:%02X:%02X:%02X rcf:%04X\n", * FIXME: We ought to keep some kind of cache size * limiting and adjust the timers to suit. */ - entry=kmalloc(sizeof(struct rif_cache_s),GFP_ATOMIC); + entry=kmalloc(sizeof(struct rif_cache),GFP_ATOMIC); - if(!entry) + if(!entry) { printk(KERN_DEBUG "tr.c: Couldn't malloc rif cache entry !\n"); - spin_unlock_bh(&rif_lock); + spin_unlock_irqrestore(&rif_lock, flags); return; } @@ -393,50 +397,48 @@ printk("adding rif_entry: addr:%02X:%02X:%02X:%02X:%02X:%02X rcf:%04X\n", 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; - trh->saddr[0]|=TR_RII; /* put the routing indicator back for tcpdump */ } else { entry->local_ring = 1; } - } + } else /* Y. Tahara added */ - { + { /* * Update existing entries */ - if (!entry->local_ring) + 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:%02X:%02X:%02X:%02X:%02X:%02X rcf:%04X\n", - trh->saddr[0],trh->saddr[1],trh->saddr[2], - trh->saddr[3],trh->saddr[4],trh->saddr[5], - ntohs(trh->rcf)); +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; + memcpy(&(entry->rseg[0]),&(trh->rseg[0]),8*sizeof(unsigned short)); + } + entry->last_used=jiffies; } - spin_unlock_bh(&rif_lock); + 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) +static void rif_check_expire(unsigned long dummy) { int i; - unsigned long next_interval = jiffies + sysctl_tr_rif_timeout/2; + unsigned long flags, next_interval = jiffies + sysctl_tr_rif_timeout/2; + + spin_lock_irqsave(&rif_lock, flags); - spin_lock_bh(&rif_lock); - for(i =0; i < RIF_TABLE_SIZE; i++) { - struct rif_cache_s *entry, **pentry; - + struct rif_cache *entry, **pentry; + pentry = rif_table+i; while((entry=*pentry) != NULL) { unsigned long expires @@ -453,8 +455,8 @@ static void rif_check_expire(unsigned long dummy) } } } - - spin_unlock_bh(&rif_lock); + + spin_unlock_irqrestore(&rif_lock, flags); mod_timer(&rif_timer, next_interval); @@ -464,16 +466,16 @@ static void rif_check_expire(unsigned long dummy) * Generate the /proc/net information for the token ring RIF * routing. */ - + #ifdef CONFIG_PROC_FS -static struct rif_cache_s *rif_get_idx(loff_t pos) +static struct rif_cache *rif_get_idx(loff_t pos) { int i; - struct rif_cache_s *entry; + struct rif_cache *entry; loff_t off = 0; - for(i = 0; i < RIF_TABLE_SIZE; i++) + for(i = 0; i < RIF_TABLE_SIZE; i++) for(entry = rif_table[i]; entry; entry = entry->next) { if (off == pos) return entry; @@ -485,7 +487,7 @@ static struct rif_cache_s *rif_get_idx(loff_t pos) static void *rif_seq_start(struct seq_file *seq, loff_t *pos) { - spin_lock_bh(&rif_lock); + spin_lock_irq(&rif_lock); return *pos ? rif_get_idx(*pos - 1) : SEQ_START_TOKEN; } @@ -493,7 +495,7 @@ static void *rif_seq_start(struct seq_file *seq, loff_t *pos) static void *rif_seq_next(struct seq_file *seq, void *v, loff_t *pos) { int i; - struct rif_cache_s *ent = v; + struct rif_cache *ent = v; ++*pos; @@ -502,7 +504,7 @@ static void *rif_seq_next(struct seq_file *seq, void *v, loff_t *pos) goto scan; } - if (ent->next) + if (ent->next) return ent->next; i = rif_hash(ent->addr); @@ -516,53 +518,53 @@ static void *rif_seq_next(struct seq_file *seq, void *v, loff_t *pos) static void rif_seq_stop(struct seq_file *seq, void *v) { - spin_unlock_bh(&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_s *entry = v; + 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(entry->iface); + 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 %02X:%02X:%02X:%02X:%02X:%02X %7li ", + seq_printf(seq, "%s %pM %7li ", dev?dev->name:"?", - entry->addr[0],entry->addr[1],entry->addr[2], - entry->addr[3],entry->addr[4],entry->addr[5], + entry->addr, ttl/HZ); if (entry->local_ring) - seq_puts(seq, "local\n"); + seq_puts(seq, "local\n"); else { seq_printf(seq, "%04X", ntohs(entry->rcf)); - rcf_len = ((ntohs(entry->rcf) & TR_RCF_LEN_MASK)>>8)-2; + rcf_len = ((ntohs(entry->rcf) & TR_RCF_LEN_MASK)>>8)-2; if (rcf_len) - rcf_len >>= 1; + 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'); } - } + } return 0; } -static struct seq_operations rif_seq_ops = { +static const struct seq_operations rif_seq_ops = { .start = rif_seq_start, .next = rif_seq_next, .stop = rif_seq_stop, @@ -574,7 +576,7 @@ static int rif_seq_open(struct inode *inode, struct file *file) return seq_open(file, &rif_seq_ops); } -static struct file_operations rif_seq_fops = { +static const struct file_operations rif_seq_fops = { .owner = THIS_MODULE, .open = rif_seq_open, .read = seq_read, @@ -584,21 +586,25 @@ static struct file_operations rif_seq_fops = { #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->hard_header = tr_header; - dev->rebuild_header = tr_rebuild_header; + + dev->header_ops = &tr_header_ops; dev->type = ARPHRD_IEEE802_TR; 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. */ @@ -621,6 +627,26 @@ 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[] = { + { + .ctl_name = NET_TR_RIF_TIMEOUT, + .procname = "rif_timeout", + .data = &sysctl_tr_rif_timeout, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_dointvec + }, + { 0 }, +}; + +static __initdata struct ctl_path tr_path[] = { + { .procname = "net", .ctl_name = CTL_NET, }, + { .procname = "token-ring", .ctl_name = NET_TR, }, + { } +}; +#endif + /* * Called during bootup. We don't actually have to initialise * too much for this. @@ -628,18 +654,19 @@ struct net_device *alloc_trdev(int sizeof_priv) static int __init rif_init(void) { - init_timer(&rif_timer); - rif_timer.expires = sysctl_tr_rif_timeout; - rif_timer.data = 0L; - rif_timer.function = rif_check_expire; + rif_timer.expires = jiffies + sysctl_tr_rif_timeout; + setup_timer(&rif_timer, rif_check_expire, 0); add_timer(&rif_timer); - - proc_net_fops_create("tr_rif", S_IRUGO, &rif_seq_fops); +#ifdef CONFIG_SYSCTL + register_sysctl_paths(tr_path, 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_source_route); EXPORT_SYMBOL(tr_type_trans); EXPORT_SYMBOL(alloc_trdev); + +MODULE_LICENSE("GPL");