root-commit (tr.c and vicinity taken from v3.4)
This commit is contained in:
commit
9cbcf0c5a3
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@ -0,0 +1,5 @@
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|||
modules.order
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Module.symvers
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*.cmd
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*.d
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*.o
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@ -0,0 +1,8 @@
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EXTRA_CFLAGS := -I$(src)/include
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obj-m += tr.o
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all:
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make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules
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clean:
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make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean
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@ -0,0 +1,103 @@
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/*
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* INET An implementation of the TCP/IP protocol suite for the LINUX
|
||||
* 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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* Global definitions for the Token-Ring IEEE 802.5 interface.
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*
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* Version: @(#)if_tr.h 0.0 07/11/94
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*
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* Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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* Donald Becker, <becker@super.org>
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* Peter De Schrijver, <stud11@cc4.kuleuven.ac.be>
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||||
*
|
||||
* 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.
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||||
*/
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#ifndef _LINUX_IF_TR_H
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#define _LINUX_IF_TR_H
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#include <linux/types.h>
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#include <asm/byteorder.h> /* For __be16 */
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/* IEEE 802.5 Token-Ring magic constants. The frame sizes omit the preamble
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and FCS/CRC (frame check sequence). */
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#define TR_ALEN 6 /* Octets in one token-ring addr */
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#define TR_HLEN (sizeof(struct trh_hdr)+sizeof(struct trllc))
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#define AC 0x10
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#define LLC_FRAME 0x40
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/* LLC and SNAP constants */
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#define EXTENDED_SAP 0xAA
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#define UI_CMD 0x03
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/* This is an Token-Ring frame header. */
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struct trh_hdr {
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__u8 ac; /* access control field */
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__u8 fc; /* frame control field */
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__u8 daddr[TR_ALEN]; /* destination address */
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__u8 saddr[TR_ALEN]; /* source address */
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__be16 rcf; /* route control field */
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__be16 rseg[8]; /* routing registers */
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};
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#ifdef __KERNEL__
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#include <linux/skbuff.h>
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static inline struct trh_hdr *tr_hdr(const struct sk_buff *skb)
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{
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return (struct trh_hdr *)skb_mac_header(skb);
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}
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#endif
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/* This is an Token-Ring LLC structure */
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struct trllc {
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__u8 dsap; /* destination SAP */
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__u8 ssap; /* source SAP */
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__u8 llc; /* LLC control field */
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__u8 protid[3]; /* protocol id */
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__be16 ethertype; /* ether type field */
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};
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|
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/* Token-Ring statistics collection data. */
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struct tr_statistics {
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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 */
|
||||
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 transmit_collision;
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|
||||
/* detailed Token-Ring errors. See IBM Token-Ring Network
|
||||
Architecture for more info */
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|
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unsigned long line_errors;
|
||||
unsigned long internal_errors;
|
||||
unsigned long burst_errors;
|
||||
unsigned long A_C_errors;
|
||||
unsigned long abort_delimiters;
|
||||
unsigned long lost_frames;
|
||||
unsigned long recv_congest_count;
|
||||
unsigned long frame_copied_errors;
|
||||
unsigned long frequency_errors;
|
||||
unsigned long token_errors;
|
||||
unsigned long dummy1;
|
||||
};
|
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|
||||
/* source routing stuff */
|
||||
#define TR_RII 0x80
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#define TR_RCF_DIR_BIT 0x80
|
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#define TR_RCF_LEN_MASK 0x1f00
|
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#define TR_RCF_BROADCAST 0x8000 /* all-routes broadcast */
|
||||
#define TR_RCF_LIMITED_BROADCAST 0xC000 /* single-route broadcast */
|
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#define TR_RCF_FRAME2K 0x20
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#define TR_RCF_BROADCAST_MASK 0xC000
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#define TR_MAXRIFLEN 18
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|
||||
#endif /* _LINUX_IF_TR_H */
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@ -0,0 +1,37 @@
|
|||
/*
|
||||
* INET An implementation of the TCP/IP protocol suite for the LINUX
|
||||
* operating system. NET is implemented using the BSD Socket
|
||||
* interface as the means of communication with the user level.
|
||||
*
|
||||
* Definitions for the Token-ring handlers.
|
||||
*
|
||||
* Version: @(#)eth.h 1.0.4 05/13/93
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||||
*
|
||||
* Authors: Ross Biro
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||||
* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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*
|
||||
* Relocated to include/linux where it belongs by Alan Cox
|
||||
* <gw4pts@gw4pts.ampr.org>
|
||||
*
|
||||
* 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.
|
||||
*
|
||||
* WARNING: This move may well be temporary. This file will get merged with others RSN.
|
||||
*
|
||||
*/
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||||
#ifndef _LINUX_TRDEVICE_H
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#define _LINUX_TRDEVICE_H
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||||
|
||||
|
||||
#include <linux/if_tr.h>
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||||
|
||||
#ifdef __KERNEL__
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||||
extern __be16 tr_type_trans(struct sk_buff *skb, struct net_device *dev);
|
||||
extern void tr_source_route(struct sk_buff *skb, struct trh_hdr *trh, struct net_device *dev);
|
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extern struct net_device *alloc_trdev(int sizeof_priv);
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#endif
|
||||
|
||||
#endif /* _LINUX_TRDEVICE_H */
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@ -0,0 +1,676 @@
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|||
/*
|
||||
* 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>
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||||
#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>
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#include <net/arp.h>
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||||
#include <net/net_namespace.h>
|
||||
|
||||
static void tr_add_rif_info(struct trh_hdr *trh, struct net_device *dev);
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||||
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;
|
||||
};
|
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|
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#define RIF_TABLE_SIZE 32
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/*
|
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* We hash the RIF cache 32 ways. We do after all have to look it
|
||||
* up a lot.
|
||||
*/
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static struct rif_cache *rif_table[RIF_TABLE_SIZE];
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static DEFINE_SPINLOCK(rif_lock);
|
||||
|
||||
|
||||
/*
|
||||
* Garbage disposal timer.
|
||||
*/
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||||
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||||
static struct timer_list rif_timer;
|
||||
|
||||
static int sysctl_tr_rif_timeout = 60*10*HZ;
|
||||
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||||
static inline unsigned long rif_hash(const unsigned char *addr)
|
||||
{
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unsigned long x;
|
||||
|
||||
x = addr[0];
|
||||
x = (x << 2) ^ addr[1];
|
||||
x = (x << 2) ^ addr[2];
|
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x = (x << 2) ^ addr[3];
|
||||
x = (x << 2) ^ addr[4];
|
||||
x = (x << 2) ^ addr[5];
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||||
|
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x ^= x >> 8;
|
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|
||||
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 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 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->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. */
|
||||
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
|
||||
},
|
||||
{ },
|
||||
};
|
||||
|
||||
static __initdata struct ctl_path tr_path[] = {
|
||||
{ .procname = "net", },
|
||||
{ .procname = "token-ring", },
|
||||
{ }
|
||||
};
|
||||
#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_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_type_trans);
|
||||
EXPORT_SYMBOL(alloc_trdev);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
Loading…
Reference in New Issue