/*
|
/*
|
Experimental ethernet netdevice using ATM AAL5 as underlying carrier
|
Experimental ethernet netdevice using ATM AAL5 as underlying carrier
|
(RFC1483 obsoleted by RFC2684) for Linux 2.4
|
(RFC1483 obsoleted by RFC2684) for Linux 2.4
|
Author: Marcell GAL, 2000, XDSL Ltd, Hungary
|
Author: Marcell GAL, 2000, XDSL Ltd, Hungary
|
*/
|
*/
|
|
|
#include <linux/module.h>
|
#include <linux/module.h>
|
#include <linux/config.h>
|
#include <linux/config.h>
|
#include <linux/init.h>
|
#include <linux/init.h>
|
#include <linux/kernel.h>
|
#include <linux/kernel.h>
|
#include <linux/list.h>
|
#include <linux/list.h>
|
#include <linux/netdevice.h>
|
#include <linux/netdevice.h>
|
#include <linux/skbuff.h>
|
#include <linux/skbuff.h>
|
#include <linux/etherdevice.h>
|
#include <linux/etherdevice.h>
|
#include <linux/rtnetlink.h>
|
#include <linux/rtnetlink.h>
|
#include <linux/ip.h>
|
#include <linux/ip.h>
|
#include <asm/uaccess.h>
|
#include <asm/uaccess.h>
|
#include <net/arp.h>
|
#include <net/arp.h>
|
#include <linux/atm.h>
|
#include <linux/atm.h>
|
#include <linux/atmdev.h>
|
#include <linux/atmdev.h>
|
|
|
#include <linux/atmbr2684.h>
|
#include <linux/atmbr2684.h>
|
|
|
#include "common.h"
|
#include "common.h"
|
#include "ipcommon.h"
|
#include "ipcommon.h"
|
|
|
/*
|
/*
|
* Define this to use a version of the code which interacts with the higher
|
* Define this to use a version of the code which interacts with the higher
|
* layers in a more intellegent way, by always reserving enough space for
|
* layers in a more intellegent way, by always reserving enough space for
|
* our header at the begining of the packet. However, there may still be
|
* our header at the begining of the packet. However, there may still be
|
* some problems with programs like tcpdump. In 2.5 we'll sort out what
|
* some problems with programs like tcpdump. In 2.5 we'll sort out what
|
* we need to do to get this perfect. For now we just will copy the packet
|
* we need to do to get this perfect. For now we just will copy the packet
|
* if we need space for the header
|
* if we need space for the header
|
*/
|
*/
|
/* #define FASTER_VERSION */
|
/* #define FASTER_VERSION */
|
|
|
#ifdef DEBUG
|
#ifdef DEBUG
|
#define DPRINTK(format, args...) printk(KERN_DEBUG "br2684: " format, ##args)
|
#define DPRINTK(format, args...) printk(KERN_DEBUG "br2684: " format, ##args)
|
#else
|
#else
|
#define DPRINTK(format, args...)
|
#define DPRINTK(format, args...)
|
#endif
|
#endif
|
|
|
#ifdef SKB_DEBUG
|
#ifdef SKB_DEBUG
|
static void skb_debug(const struct sk_buff *skb)
|
static void skb_debug(const struct sk_buff *skb)
|
{
|
{
|
#define NUM2PRINT 50
|
#define NUM2PRINT 50
|
char buf[NUM2PRINT * 3 + 1]; /* 3 chars per byte */
|
char buf[NUM2PRINT * 3 + 1]; /* 3 chars per byte */
|
int i = 0;
|
int i = 0;
|
for (i = 0; i < skb->len && i < NUM2PRINT; i++) {
|
for (i = 0; i < skb->len && i < NUM2PRINT; i++) {
|
sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
|
sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
|
}
|
}
|
printk(KERN_DEBUG "br2684: skb: %s\n", buf);
|
printk(KERN_DEBUG "br2684: skb: %s\n", buf);
|
}
|
}
|
#else
|
#else
|
#define skb_debug(skb) do {} while (0)
|
#define skb_debug(skb) do {} while (0)
|
#endif
|
#endif
|
|
|
static unsigned char llc_oui_pid_pad[] =
|
static unsigned char llc_oui_pid_pad[] =
|
{ 0xAA, 0xAA, 0x03, 0x00, 0x80, 0xC2, 0x00, 0x07, 0x00, 0x00 };
|
{ 0xAA, 0xAA, 0x03, 0x00, 0x80, 0xC2, 0x00, 0x07, 0x00, 0x00 };
|
#define PADLEN (2)
|
#define PADLEN (2)
|
|
|
enum br2684_encaps {
|
enum br2684_encaps {
|
e_vc = BR2684_ENCAPS_VC,
|
e_vc = BR2684_ENCAPS_VC,
|
e_llc = BR2684_ENCAPS_LLC,
|
e_llc = BR2684_ENCAPS_LLC,
|
};
|
};
|
|
|
struct br2684_vcc {
|
struct br2684_vcc {
|
struct atm_vcc *atmvcc;
|
struct atm_vcc *atmvcc;
|
struct br2684_dev *brdev;
|
struct br2684_dev *brdev;
|
/* keep old push,pop functions for chaining */
|
/* keep old push,pop functions for chaining */
|
void (*old_push)(struct atm_vcc *vcc,struct sk_buff *skb);
|
void (*old_push)(struct atm_vcc *vcc,struct sk_buff *skb);
|
/* void (*old_pop)(struct atm_vcc *vcc,struct sk_buff *skb); */
|
/* void (*old_pop)(struct atm_vcc *vcc,struct sk_buff *skb); */
|
enum br2684_encaps encaps;
|
enum br2684_encaps encaps;
|
struct list_head brvccs;
|
struct list_head brvccs;
|
#ifdef CONFIG_ATM_BR2684_IPFILTER
|
#ifdef CONFIG_ATM_BR2684_IPFILTER
|
struct br2684_filter filter;
|
struct br2684_filter filter;
|
#endif /* CONFIG_ATM_BR2684_IPFILTER */
|
#endif /* CONFIG_ATM_BR2684_IPFILTER */
|
#ifndef FASTER_VERSION
|
#ifndef FASTER_VERSION
|
unsigned copies_needed, copies_failed;
|
unsigned copies_needed, copies_failed;
|
#endif /* FASTER_VERSION */
|
#endif /* FASTER_VERSION */
|
};
|
};
|
|
|
struct br2684_dev {
|
struct br2684_dev {
|
struct net_device net_dev;
|
struct net_device net_dev;
|
struct list_head br2684_devs;
|
struct list_head br2684_devs;
|
int number;
|
int number;
|
struct list_head brvccs; /* one device <=> one vcc (before xmas) */
|
struct list_head brvccs; /* one device <=> one vcc (before xmas) */
|
struct net_device_stats stats;
|
struct net_device_stats stats;
|
int mac_was_set;
|
int mac_was_set;
|
};
|
};
|
|
|
/*
|
/*
|
* This lock should be held for writing any time the list of devices or
|
* This lock should be held for writing any time the list of devices or
|
* their attached vcc's could be altered. It should be held for reading
|
* their attached vcc's could be altered. It should be held for reading
|
* any time these are being queried. Note that we sometimes need to
|
* any time these are being queried. Note that we sometimes need to
|
* do read-locking under interrupt context, so write locking must block
|
* do read-locking under interrupt context, so write locking must block
|
* the current CPU's interrupts
|
* the current CPU's interrupts
|
*/
|
*/
|
static rwlock_t devs_lock = RW_LOCK_UNLOCKED;
|
static rwlock_t devs_lock = RW_LOCK_UNLOCKED;
|
|
|
static LIST_HEAD(br2684_devs);
|
static LIST_HEAD(br2684_devs);
|
|
|
static inline struct br2684_dev *BRPRIV(const struct net_device *net_dev)
|
static inline struct br2684_dev *BRPRIV(const struct net_device *net_dev)
|
{
|
{
|
return (struct br2684_dev *) ((char *) (net_dev) -
|
return (struct br2684_dev *) ((char *) (net_dev) -
|
(unsigned long) (&((struct br2684_dev *) 0)->net_dev));
|
(unsigned long) (&((struct br2684_dev *) 0)->net_dev));
|
}
|
}
|
|
|
static inline struct br2684_dev *list_entry_brdev(const struct list_head *le)
|
static inline struct br2684_dev *list_entry_brdev(const struct list_head *le)
|
{
|
{
|
return list_entry(le, struct br2684_dev, br2684_devs);
|
return list_entry(le, struct br2684_dev, br2684_devs);
|
}
|
}
|
|
|
static inline struct br2684_vcc *BR2684_VCC(const struct atm_vcc *atmvcc)
|
static inline struct br2684_vcc *BR2684_VCC(const struct atm_vcc *atmvcc)
|
{
|
{
|
return (struct br2684_vcc *) (atmvcc->user_back);
|
return (struct br2684_vcc *) (atmvcc->user_back);
|
}
|
}
|
|
|
static inline struct br2684_vcc *list_entry_brvcc(const struct list_head *le)
|
static inline struct br2684_vcc *list_entry_brvcc(const struct list_head *le)
|
{
|
{
|
return list_entry(le, struct br2684_vcc, brvccs);
|
return list_entry(le, struct br2684_vcc, brvccs);
|
}
|
}
|
|
|
/* Caller should hold read_lock(&devs_lock) */
|
/* Caller should hold read_lock(&devs_lock) */
|
static struct br2684_dev *br2684_find_dev(const struct br2684_if_spec *s)
|
static struct br2684_dev *br2684_find_dev(const struct br2684_if_spec *s)
|
{
|
{
|
struct list_head *lh;
|
struct list_head *lh;
|
struct br2684_dev *brdev;
|
struct br2684_dev *brdev;
|
switch (s->method) {
|
switch (s->method) {
|
case BR2684_FIND_BYNUM:
|
case BR2684_FIND_BYNUM:
|
list_for_each(lh, &br2684_devs) {
|
list_for_each(lh, &br2684_devs) {
|
brdev = list_entry_brdev(lh);
|
brdev = list_entry_brdev(lh);
|
if (brdev->number == s->spec.devnum)
|
if (brdev->number == s->spec.devnum)
|
return brdev;
|
return brdev;
|
}
|
}
|
break;
|
break;
|
case BR2684_FIND_BYIFNAME:
|
case BR2684_FIND_BYIFNAME:
|
list_for_each(lh, &br2684_devs) {
|
list_for_each(lh, &br2684_devs) {
|
brdev = list_entry_brdev(lh);
|
brdev = list_entry_brdev(lh);
|
if (!strncmp(brdev->net_dev.name, s->spec.ifname,
|
if (!strncmp(brdev->net_dev.name, s->spec.ifname,
|
sizeof brdev->net_dev.name))
|
sizeof brdev->net_dev.name))
|
return brdev;
|
return brdev;
|
}
|
}
|
break;
|
break;
|
}
|
}
|
return NULL;
|
return NULL;
|
}
|
}
|
|
|
/*
|
/*
|
* Send a packet out a particular vcc. Not to useful right now, but paves
|
* Send a packet out a particular vcc. Not to useful right now, but paves
|
* the way for multiple vcc's per itf. Returns true if we can send,
|
* the way for multiple vcc's per itf. Returns true if we can send,
|
* otherwise false
|
* otherwise false
|
*/
|
*/
|
static int br2684_xmit_vcc(struct sk_buff *skb, struct br2684_dev *brdev,
|
static int br2684_xmit_vcc(struct sk_buff *skb, struct br2684_dev *brdev,
|
struct br2684_vcc *brvcc)
|
struct br2684_vcc *brvcc)
|
{
|
{
|
struct atm_vcc *atmvcc;
|
struct atm_vcc *atmvcc;
|
#ifdef FASTER_VERSION
|
#ifdef FASTER_VERSION
|
if (brvcc->encaps == e_llc)
|
if (brvcc->encaps == e_llc)
|
memcpy(skb_push(skb, 8), llc_oui_pid_pad, 8);
|
memcpy(skb_push(skb, 8), llc_oui_pid_pad, 8);
|
/* last 2 bytes of llc_oui_pid_pad are managed by header routines;
|
/* last 2 bytes of llc_oui_pid_pad are managed by header routines;
|
yes, you got it: 8 + 2 = sizeof(llc_oui_pid_pad)
|
yes, you got it: 8 + 2 = sizeof(llc_oui_pid_pad)
|
*/
|
*/
|
#else
|
#else
|
int minheadroom = (brvcc->encaps == e_llc) ? 10 : 2;
|
int minheadroom = (brvcc->encaps == e_llc) ? 10 : 2;
|
if (skb_headroom(skb) < minheadroom) {
|
if (skb_headroom(skb) < minheadroom) {
|
struct sk_buff *skb2 = skb_realloc_headroom(skb, minheadroom);
|
struct sk_buff *skb2 = skb_realloc_headroom(skb, minheadroom);
|
brvcc->copies_needed++;
|
brvcc->copies_needed++;
|
dev_kfree_skb(skb);
|
dev_kfree_skb(skb);
|
if (skb2 == NULL) {
|
if (skb2 == NULL) {
|
brvcc->copies_failed++;
|
brvcc->copies_failed++;
|
return 0;
|
return 0;
|
}
|
}
|
skb = skb2;
|
skb = skb2;
|
}
|
}
|
skb_push(skb, minheadroom);
|
skb_push(skb, minheadroom);
|
if (brvcc->encaps == e_llc)
|
if (brvcc->encaps == e_llc)
|
memcpy(skb->data, llc_oui_pid_pad, 10);
|
memcpy(skb->data, llc_oui_pid_pad, 10);
|
else
|
else
|
memset(skb->data, 0, 2);
|
memset(skb->data, 0, 2);
|
#endif /* FASTER_VERSION */
|
#endif /* FASTER_VERSION */
|
skb_debug(skb);
|
skb_debug(skb);
|
|
|
ATM_SKB(skb)->vcc = atmvcc = brvcc->atmvcc;
|
ATM_SKB(skb)->vcc = atmvcc = brvcc->atmvcc;
|
DPRINTK("atm_skb(%p)->vcc(%p)->dev(%p)\n", skb, atmvcc, atmvcc->dev);
|
DPRINTK("atm_skb(%p)->vcc(%p)->dev(%p)\n", skb, atmvcc, atmvcc->dev);
|
if (!atm_may_send(atmvcc, skb->truesize)) {
|
if (!atm_may_send(atmvcc, skb->truesize)) {
|
/* we free this here for now, because we cannot know in a higher
|
/* we free this here for now, because we cannot know in a higher
|
layer whether the skb point it supplied wasn't freed yet.
|
layer whether the skb point it supplied wasn't freed yet.
|
now, it always is.
|
now, it always is.
|
*/
|
*/
|
dev_kfree_skb(skb);
|
dev_kfree_skb(skb);
|
return 0;
|
return 0;
|
}
|
}
|
atomic_add(skb->truesize, &atmvcc->sk->wmem_alloc);
|
atomic_add(skb->truesize, &atmvcc->sk->wmem_alloc);
|
ATM_SKB(skb)->atm_options = atmvcc->atm_options;
|
ATM_SKB(skb)->atm_options = atmvcc->atm_options;
|
brdev->stats.tx_packets++;
|
brdev->stats.tx_packets++;
|
brdev->stats.tx_bytes += skb->len;
|
brdev->stats.tx_bytes += skb->len;
|
atmvcc->send(atmvcc, skb);
|
atmvcc->send(atmvcc, skb);
|
return 1;
|
return 1;
|
}
|
}
|
|
|
static inline struct br2684_vcc *pick_outgoing_vcc(struct sk_buff *skb,
|
static inline struct br2684_vcc *pick_outgoing_vcc(struct sk_buff *skb,
|
struct br2684_dev *brdev)
|
struct br2684_dev *brdev)
|
{
|
{
|
return list_empty(&brdev->brvccs) ? NULL :
|
return list_empty(&brdev->brvccs) ? NULL :
|
list_entry_brvcc(brdev->brvccs.next); /* 1 vcc/dev right now */
|
list_entry_brvcc(brdev->brvccs.next); /* 1 vcc/dev right now */
|
}
|
}
|
|
|
static int br2684_start_xmit(struct sk_buff *skb, struct net_device *dev)
|
static int br2684_start_xmit(struct sk_buff *skb, struct net_device *dev)
|
{
|
{
|
struct br2684_dev *brdev = BRPRIV(dev);
|
struct br2684_dev *brdev = BRPRIV(dev);
|
struct br2684_vcc *brvcc;
|
struct br2684_vcc *brvcc;
|
|
|
DPRINTK("br2684_start_xmit, skb->dst=%p\n", skb->dst);
|
DPRINTK("br2684_start_xmit, skb->dst=%p\n", skb->dst);
|
read_lock(&devs_lock);
|
read_lock(&devs_lock);
|
brvcc = pick_outgoing_vcc(skb, brdev);
|
brvcc = pick_outgoing_vcc(skb, brdev);
|
if (brvcc == NULL) {
|
if (brvcc == NULL) {
|
DPRINTK("no vcc attached to dev %s\n", dev->name);
|
DPRINTK("no vcc attached to dev %s\n", dev->name);
|
brdev->stats.tx_errors++;
|
brdev->stats.tx_errors++;
|
brdev->stats.tx_carrier_errors++;
|
brdev->stats.tx_carrier_errors++;
|
/* netif_stop_queue(dev); */
|
/* netif_stop_queue(dev); */
|
dev_kfree_skb(skb);
|
dev_kfree_skb(skb);
|
read_unlock(&devs_lock);
|
read_unlock(&devs_lock);
|
return -EUNATCH;
|
return -EUNATCH;
|
}
|
}
|
if (!br2684_xmit_vcc(skb, brdev, brvcc)) {
|
if (!br2684_xmit_vcc(skb, brdev, brvcc)) {
|
/*
|
/*
|
* We should probably use netif_*_queue() here, but that
|
* We should probably use netif_*_queue() here, but that
|
* involves added complication. We need to walk before
|
* involves added complication. We need to walk before
|
* we can run
|
* we can run
|
*/
|
*/
|
/* don't free here! this pointer might be no longer valid!
|
/* don't free here! this pointer might be no longer valid!
|
dev_kfree_skb(skb);
|
dev_kfree_skb(skb);
|
*/
|
*/
|
brdev->stats.tx_errors++;
|
brdev->stats.tx_errors++;
|
brdev->stats.tx_fifo_errors++;
|
brdev->stats.tx_fifo_errors++;
|
}
|
}
|
read_unlock(&devs_lock);
|
read_unlock(&devs_lock);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static struct net_device_stats *br2684_get_stats(struct net_device *dev)
|
static struct net_device_stats *br2684_get_stats(struct net_device *dev)
|
{
|
{
|
DPRINTK("br2684_get_stats\n");
|
DPRINTK("br2684_get_stats\n");
|
return &BRPRIV(dev)->stats;
|
return &BRPRIV(dev)->stats;
|
}
|
}
|
|
|
#ifdef FASTER_VERSION
|
#ifdef FASTER_VERSION
|
/*
|
/*
|
* These mirror eth_header and eth_header_cache. They are not usually
|
* These mirror eth_header and eth_header_cache. They are not usually
|
* exported for use in modules, so we grab them from net_device
|
* exported for use in modules, so we grab them from net_device
|
* after ether_setup() is done with it. Bit of a hack.
|
* after ether_setup() is done with it. Bit of a hack.
|
*/
|
*/
|
static int (*my_eth_header)(struct sk_buff *, struct net_device *,
|
static int (*my_eth_header)(struct sk_buff *, struct net_device *,
|
unsigned short, void *, void *, unsigned);
|
unsigned short, void *, void *, unsigned);
|
static int (*my_eth_header_cache)(struct neighbour *, struct hh_cache *);
|
static int (*my_eth_header_cache)(struct neighbour *, struct hh_cache *);
|
|
|
static int
|
static int
|
br2684_header(struct sk_buff *skb, struct net_device *dev,
|
br2684_header(struct sk_buff *skb, struct net_device *dev,
|
unsigned short type, void *daddr, void *saddr, unsigned len)
|
unsigned short type, void *daddr, void *saddr, unsigned len)
|
{
|
{
|
u16 *pad_before_eth;
|
u16 *pad_before_eth;
|
int t = my_eth_header(skb, dev, type, daddr, saddr, len);
|
int t = my_eth_header(skb, dev, type, daddr, saddr, len);
|
if (t > 0) {
|
if (t > 0) {
|
pad_before_eth = (u16 *) skb_push(skb, 2);
|
pad_before_eth = (u16 *) skb_push(skb, 2);
|
*pad_before_eth = 0;
|
*pad_before_eth = 0;
|
return dev->hard_header_len; /* or return 16; ? */
|
return dev->hard_header_len; /* or return 16; ? */
|
} else
|
} else
|
return t;
|
return t;
|
}
|
}
|
|
|
static int
|
static int
|
br2684_header_cache(struct neighbour *neigh, struct hh_cache *hh)
|
br2684_header_cache(struct neighbour *neigh, struct hh_cache *hh)
|
{
|
{
|
/* hh_data is 16 bytes long. if encaps is ether-llc we need 24, so
|
/* hh_data is 16 bytes long. if encaps is ether-llc we need 24, so
|
xmit will add the additional header part in that case */
|
xmit will add the additional header part in that case */
|
u16 *pad_before_eth = (u16 *)(hh->hh_data);
|
u16 *pad_before_eth = (u16 *)(hh->hh_data);
|
int t = my_eth_header_cache(neigh, hh);
|
int t = my_eth_header_cache(neigh, hh);
|
DPRINTK("br2684_header_cache, neigh=%p, hh_cache=%p\n", neigh, hh);
|
DPRINTK("br2684_header_cache, neigh=%p, hh_cache=%p\n", neigh, hh);
|
if (t < 0)
|
if (t < 0)
|
return t;
|
return t;
|
else {
|
else {
|
*pad_before_eth = 0;
|
*pad_before_eth = 0;
|
hh->hh_len = PADLEN + ETH_HLEN;
|
hh->hh_len = PADLEN + ETH_HLEN;
|
}
|
}
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/*
|
/*
|
* This is similar to eth_type_trans, which cannot be used because of
|
* This is similar to eth_type_trans, which cannot be used because of
|
* our dev->hard_header_len
|
* our dev->hard_header_len
|
*/
|
*/
|
static inline unsigned short br_type_trans(struct sk_buff *skb,
|
static inline unsigned short br_type_trans(struct sk_buff *skb,
|
struct net_device *dev)
|
struct net_device *dev)
|
{
|
{
|
struct ethhdr *eth;
|
struct ethhdr *eth;
|
unsigned char *rawp;
|
unsigned char *rawp;
|
eth = skb->mac.ethernet;
|
eth = skb->mac.ethernet;
|
|
|
if (*eth->h_dest & 1) {
|
if (*eth->h_dest & 1) {
|
if (memcmp(eth->h_dest, dev->broadcast, ETH_ALEN) == 0)
|
if (memcmp(eth->h_dest, dev->broadcast, ETH_ALEN) == 0)
|
skb->pkt_type = PACKET_BROADCAST;
|
skb->pkt_type = PACKET_BROADCAST;
|
else
|
else
|
skb->pkt_type = PACKET_MULTICAST;
|
skb->pkt_type = PACKET_MULTICAST;
|
}
|
}
|
|
|
else if (memcmp(eth->h_dest, dev->dev_addr, ETH_ALEN))
|
else if (memcmp(eth->h_dest, dev->dev_addr, ETH_ALEN))
|
skb->pkt_type = PACKET_OTHERHOST;
|
skb->pkt_type = PACKET_OTHERHOST;
|
|
|
if (ntohs(eth->h_proto) >= 1536)
|
if (ntohs(eth->h_proto) >= 1536)
|
return eth->h_proto;
|
return eth->h_proto;
|
|
|
rawp = skb->data;
|
rawp = skb->data;
|
|
|
/*
|
/*
|
* This is a magic hack to spot IPX packets. Older Novell breaks
|
* This is a magic hack to spot IPX packets. Older Novell breaks
|
* the protocol design and runs IPX over 802.3 without an 802.2 LLC
|
* the protocol design and runs IPX over 802.3 without an 802.2 LLC
|
* layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
|
* layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
|
* won't work for fault tolerant netware but does for the rest.
|
* won't work for fault tolerant netware but does for the rest.
|
*/
|
*/
|
if (*(unsigned short *) rawp == 0xFFFF)
|
if (*(unsigned short *) rawp == 0xFFFF)
|
return htons(ETH_P_802_3);
|
return htons(ETH_P_802_3);
|
|
|
/*
|
/*
|
* Real 802.2 LLC
|
* Real 802.2 LLC
|
*/
|
*/
|
return htons(ETH_P_802_2);
|
return htons(ETH_P_802_2);
|
}
|
}
|
#endif /* FASTER_VERSION */
|
#endif /* FASTER_VERSION */
|
|
|
/*
|
/*
|
* We remember when the MAC gets set, so we don't override it later with
|
* We remember when the MAC gets set, so we don't override it later with
|
* the ESI of the ATM card of the first VC
|
* the ESI of the ATM card of the first VC
|
*/
|
*/
|
static int (*my_eth_mac_addr)(struct net_device *, void *);
|
static int (*my_eth_mac_addr)(struct net_device *, void *);
|
static int br2684_mac_addr(struct net_device *dev, void *p)
|
static int br2684_mac_addr(struct net_device *dev, void *p)
|
{
|
{
|
int err = my_eth_mac_addr(dev, p);
|
int err = my_eth_mac_addr(dev, p);
|
if (!err)
|
if (!err)
|
BRPRIV(dev)->mac_was_set = 1;
|
BRPRIV(dev)->mac_was_set = 1;
|
return err;
|
return err;
|
}
|
}
|
|
|
#ifdef CONFIG_ATM_BR2684_IPFILTER
|
#ifdef CONFIG_ATM_BR2684_IPFILTER
|
/* this IOCTL is experimental. */
|
/* this IOCTL is experimental. */
|
static int br2684_setfilt(struct atm_vcc *atmvcc, unsigned long arg)
|
static int br2684_setfilt(struct atm_vcc *atmvcc, unsigned long arg)
|
{
|
{
|
struct br2684_vcc *brvcc;
|
struct br2684_vcc *brvcc;
|
struct br2684_filter_set fs;
|
struct br2684_filter_set fs;
|
|
|
if (copy_from_user(&fs, (void *) arg, sizeof fs))
|
if (copy_from_user(&fs, (void *) arg, sizeof fs))
|
return -EFAULT;
|
return -EFAULT;
|
if (fs.ifspec.method != BR2684_FIND_BYNOTHING) {
|
if (fs.ifspec.method != BR2684_FIND_BYNOTHING) {
|
/*
|
/*
|
* This is really a per-vcc thing, but we can also search
|
* This is really a per-vcc thing, but we can also search
|
* by device
|
* by device
|
*/
|
*/
|
struct br2684_dev *brdev;
|
struct br2684_dev *brdev;
|
read_lock(&devs_lock);
|
read_lock(&devs_lock);
|
brdev = br2684_find_dev(&fs.ifspec);
|
brdev = br2684_find_dev(&fs.ifspec);
|
if (brdev == NULL || list_empty(&brdev->brvccs) ||
|
if (brdev == NULL || list_empty(&brdev->brvccs) ||
|
brdev->brvccs.next != brdev->brvccs.prev) /* >1 VCC */
|
brdev->brvccs.next != brdev->brvccs.prev) /* >1 VCC */
|
brvcc = NULL;
|
brvcc = NULL;
|
else
|
else
|
brvcc = list_entry_brvcc(brdev->brvccs.next);
|
brvcc = list_entry_brvcc(brdev->brvccs.next);
|
read_unlock(&devs_lock);
|
read_unlock(&devs_lock);
|
if (brvcc == NULL)
|
if (brvcc == NULL)
|
return -ESRCH;
|
return -ESRCH;
|
} else
|
} else
|
brvcc = BR2684_VCC(atmvcc);
|
brvcc = BR2684_VCC(atmvcc);
|
memcpy(&brvcc->filter, &fs.filter, sizeof(brvcc->filter));
|
memcpy(&brvcc->filter, &fs.filter, sizeof(brvcc->filter));
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/* Returns 1 if packet should be dropped */
|
/* Returns 1 if packet should be dropped */
|
static inline int
|
static inline int
|
packet_fails_filter(u16 type, struct br2684_vcc *brvcc, struct sk_buff *skb)
|
packet_fails_filter(u16 type, struct br2684_vcc *brvcc, struct sk_buff *skb)
|
{
|
{
|
if (brvcc->filter.netmask == 0)
|
if (brvcc->filter.netmask == 0)
|
return 0; /* no filter in place */
|
return 0; /* no filter in place */
|
if (type == __constant_htons(ETH_P_IP) &&
|
if (type == __constant_htons(ETH_P_IP) &&
|
(((struct iphdr *) (skb->data))->daddr & brvcc->filter.
|
(((struct iphdr *) (skb->data))->daddr & brvcc->filter.
|
netmask) == brvcc->filter.prefix)
|
netmask) == brvcc->filter.prefix)
|
return 0;
|
return 0;
|
if (type == __constant_htons(ETH_P_ARP))
|
if (type == __constant_htons(ETH_P_ARP))
|
return 0;
|
return 0;
|
/* TODO: we should probably filter ARPs too.. don't want to have
|
/* TODO: we should probably filter ARPs too.. don't want to have
|
* them returning values that don't make sense, or is that ok?
|
* them returning values that don't make sense, or is that ok?
|
*/
|
*/
|
return 1; /* drop */
|
return 1; /* drop */
|
}
|
}
|
#endif /* CONFIG_ATM_BR2684_IPFILTER */
|
#endif /* CONFIG_ATM_BR2684_IPFILTER */
|
|
|
static void br2684_close_vcc(struct br2684_vcc *brvcc)
|
static void br2684_close_vcc(struct br2684_vcc *brvcc)
|
{
|
{
|
DPRINTK("removing VCC %p from dev %p\n", brvcc, brvcc->brdev);
|
DPRINTK("removing VCC %p from dev %p\n", brvcc, brvcc->brdev);
|
write_lock_irq(&devs_lock);
|
write_lock_irq(&devs_lock);
|
list_del(&brvcc->brvccs);
|
list_del(&brvcc->brvccs);
|
write_unlock_irq(&devs_lock);
|
write_unlock_irq(&devs_lock);
|
brvcc->atmvcc->user_back = NULL; /* what about vcc->recvq ??? */
|
brvcc->atmvcc->user_back = NULL; /* what about vcc->recvq ??? */
|
brvcc->old_push(brvcc->atmvcc, NULL); /* pass on the bad news */
|
brvcc->old_push(brvcc->atmvcc, NULL); /* pass on the bad news */
|
kfree(brvcc);
|
kfree(brvcc);
|
MOD_DEC_USE_COUNT;
|
MOD_DEC_USE_COUNT;
|
}
|
}
|
|
|
/* when AAL5 PDU comes in: */
|
/* when AAL5 PDU comes in: */
|
static void br2684_push(struct atm_vcc *atmvcc, struct sk_buff *skb)
|
static void br2684_push(struct atm_vcc *atmvcc, struct sk_buff *skb)
|
{
|
{
|
struct br2684_vcc *brvcc = BR2684_VCC(atmvcc);
|
struct br2684_vcc *brvcc = BR2684_VCC(atmvcc);
|
struct br2684_dev *brdev = brvcc->brdev;
|
struct br2684_dev *brdev = brvcc->brdev;
|
int plen = sizeof(llc_oui_pid_pad) + ETH_HLEN;
|
int plen = sizeof(llc_oui_pid_pad) + ETH_HLEN;
|
|
|
DPRINTK("br2684_push\n");
|
DPRINTK("br2684_push\n");
|
|
|
if (skb == NULL) { /* skb==NULL means VCC is being destroyed */
|
if (skb == NULL) { /* skb==NULL means VCC is being destroyed */
|
br2684_close_vcc(brvcc);
|
br2684_close_vcc(brvcc);
|
if (list_empty(&brdev->brvccs)) {
|
if (list_empty(&brdev->brvccs)) {
|
read_lock(&devs_lock);
|
read_lock(&devs_lock);
|
list_del(&brdev->br2684_devs);
|
list_del(&brdev->br2684_devs);
|
read_unlock(&devs_lock);
|
read_unlock(&devs_lock);
|
unregister_netdev(&brdev->net_dev);
|
unregister_netdev(&brdev->net_dev);
|
kfree(brdev);
|
kfree(brdev);
|
}
|
}
|
return;
|
return;
|
}
|
}
|
|
|
skb_debug(skb);
|
skb_debug(skb);
|
atm_return(atmvcc, skb->truesize);
|
atm_return(atmvcc, skb->truesize);
|
DPRINTK("skb from brdev %p\n", brdev);
|
DPRINTK("skb from brdev %p\n", brdev);
|
if (brvcc->encaps == e_llc) {
|
if (brvcc->encaps == e_llc) {
|
/* let us waste some time for checking the encapsulation.
|
/* let us waste some time for checking the encapsulation.
|
Note, that only 7 char is checked so frames with a valid FCS
|
Note, that only 7 char is checked so frames with a valid FCS
|
are also accepted (but FCS is not checked of course) */
|
are also accepted (but FCS is not checked of course) */
|
if (memcmp(skb->data, llc_oui_pid_pad, 7)) {
|
if (memcmp(skb->data, llc_oui_pid_pad, 7)) {
|
brdev->stats.rx_errors++;
|
brdev->stats.rx_errors++;
|
dev_kfree_skb(skb);
|
dev_kfree_skb(skb);
|
return;
|
return;
|
}
|
}
|
|
|
/* Strip FCS if present */
|
/* Strip FCS if present */
|
if (skb->len > 7 && skb->data[7] == 0x01)
|
if (skb->len > 7 && skb->data[7] == 0x01)
|
__skb_trim(skb, skb->len - 4);
|
__skb_trim(skb, skb->len - 4);
|
} else {
|
} else {
|
plen = PADLEN + ETH_HLEN; /* pad, dstmac,srcmac, ethtype */
|
plen = PADLEN + ETH_HLEN; /* pad, dstmac,srcmac, ethtype */
|
/* first 2 chars should be 0 */
|
/* first 2 chars should be 0 */
|
if (*((u16 *) (skb->data)) != 0) {
|
if (*((u16 *) (skb->data)) != 0) {
|
brdev->stats.rx_errors++;
|
brdev->stats.rx_errors++;
|
dev_kfree_skb(skb);
|
dev_kfree_skb(skb);
|
return;
|
return;
|
}
|
}
|
}
|
}
|
if (skb->len < plen) {
|
if (skb->len < plen) {
|
brdev->stats.rx_errors++;
|
brdev->stats.rx_errors++;
|
dev_kfree_skb(skb); /* dev_ not needed? */
|
dev_kfree_skb(skb); /* dev_ not needed? */
|
return;
|
return;
|
}
|
}
|
|
|
#ifdef FASTER_VERSION
|
#ifdef FASTER_VERSION
|
/* FIXME: tcpdump shows that pointer to mac header is 2 bytes earlier,
|
/* FIXME: tcpdump shows that pointer to mac header is 2 bytes earlier,
|
than should be. What else should I set? */
|
than should be. What else should I set? */
|
skb_pull(skb, plen);
|
skb_pull(skb, plen);
|
skb->mac.raw = ((char *) (skb->data)) - ETH_HLEN;
|
skb->mac.raw = ((char *) (skb->data)) - ETH_HLEN;
|
skb->pkt_type = PACKET_HOST;
|
skb->pkt_type = PACKET_HOST;
|
#ifdef CONFIG_BR2684_FAST_TRANS
|
#ifdef CONFIG_BR2684_FAST_TRANS
|
skb->protocol = ((u16 *) skb->data)[-1];
|
skb->protocol = ((u16 *) skb->data)[-1];
|
#else /* some protocols might require this: */
|
#else /* some protocols might require this: */
|
skb->protocol = br_type_trans(skb, &brdev->net_dev);
|
skb->protocol = br_type_trans(skb, &brdev->net_dev);
|
#endif /* CONFIG_BR2684_FAST_TRANS */
|
#endif /* CONFIG_BR2684_FAST_TRANS */
|
#else
|
#else
|
skb_pull(skb, plen - ETH_HLEN);
|
skb_pull(skb, plen - ETH_HLEN);
|
skb->protocol = eth_type_trans(skb, &brdev->net_dev);
|
skb->protocol = eth_type_trans(skb, &brdev->net_dev);
|
#endif /* FASTER_VERSION */
|
#endif /* FASTER_VERSION */
|
#ifdef CONFIG_ATM_BR2684_IPFILTER
|
#ifdef CONFIG_ATM_BR2684_IPFILTER
|
if (packet_fails_filter(skb->protocol, brvcc, skb)) {
|
if (packet_fails_filter(skb->protocol, brvcc, skb)) {
|
brdev->stats.rx_dropped++;
|
brdev->stats.rx_dropped++;
|
dev_kfree_skb(skb);
|
dev_kfree_skb(skb);
|
return;
|
return;
|
}
|
}
|
#endif /* CONFIG_ATM_BR2684_IPFILTER */
|
#endif /* CONFIG_ATM_BR2684_IPFILTER */
|
skb->dev = &brdev->net_dev;
|
skb->dev = &brdev->net_dev;
|
ATM_SKB(skb)->vcc = atmvcc; /* needed ? */
|
ATM_SKB(skb)->vcc = atmvcc; /* needed ? */
|
DPRINTK("received packet's protocol: %x\n", ntohs(skb->protocol));
|
DPRINTK("received packet's protocol: %x\n", ntohs(skb->protocol));
|
skb_debug(skb);
|
skb_debug(skb);
|
if (!(brdev->net_dev.flags & IFF_UP)) { /* sigh, interface is down */
|
if (!(brdev->net_dev.flags & IFF_UP)) { /* sigh, interface is down */
|
brdev->stats.rx_dropped++;
|
brdev->stats.rx_dropped++;
|
dev_kfree_skb(skb);
|
dev_kfree_skb(skb);
|
return;
|
return;
|
}
|
}
|
brdev->stats.rx_packets++;
|
brdev->stats.rx_packets++;
|
brdev->stats.rx_bytes += skb->len;
|
brdev->stats.rx_bytes += skb->len;
|
memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
|
memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
|
netif_rx(skb);
|
netif_rx(skb);
|
}
|
}
|
|
|
static int br2684_regvcc(struct atm_vcc *atmvcc, unsigned long arg)
|
static int br2684_regvcc(struct atm_vcc *atmvcc, unsigned long arg)
|
{
|
{
|
/* assign a vcc to a dev
|
/* assign a vcc to a dev
|
Note: we do not have explicit unassign, but look at _push()
|
Note: we do not have explicit unassign, but look at _push()
|
*/
|
*/
|
int err;
|
int err;
|
struct br2684_vcc *brvcc;
|
struct br2684_vcc *brvcc;
|
struct sk_buff_head copy;
|
struct sk_buff_head copy;
|
struct sk_buff *skb;
|
struct sk_buff *skb;
|
struct br2684_dev *brdev;
|
struct br2684_dev *brdev;
|
struct atm_backend_br2684 be;
|
struct atm_backend_br2684 be;
|
|
|
MOD_INC_USE_COUNT;
|
MOD_INC_USE_COUNT;
|
if (copy_from_user(&be, (void *) arg, sizeof be)) {
|
if (copy_from_user(&be, (void *) arg, sizeof be)) {
|
MOD_DEC_USE_COUNT;
|
MOD_DEC_USE_COUNT;
|
return -EFAULT;
|
return -EFAULT;
|
}
|
}
|
write_lock_irq(&devs_lock);
|
write_lock_irq(&devs_lock);
|
brdev = br2684_find_dev(&be.ifspec);
|
brdev = br2684_find_dev(&be.ifspec);
|
if (brdev == NULL) {
|
if (brdev == NULL) {
|
printk(KERN_ERR
|
printk(KERN_ERR
|
"br2684: tried to attach to non-existant device\n");
|
"br2684: tried to attach to non-existant device\n");
|
err = -ENXIO;
|
err = -ENXIO;
|
goto error;
|
goto error;
|
}
|
}
|
if (atmvcc->push == NULL) {
|
if (atmvcc->push == NULL) {
|
err = -EBADFD;
|
err = -EBADFD;
|
goto error;
|
goto error;
|
}
|
}
|
if (!list_empty(&brdev->brvccs)) { /* Only 1 VCC/dev right now */
|
if (!list_empty(&brdev->brvccs)) { /* Only 1 VCC/dev right now */
|
err = -EEXIST;
|
err = -EEXIST;
|
goto error;
|
goto error;
|
}
|
}
|
if (be.fcs_in != BR2684_FCSIN_NO || be.fcs_out != BR2684_FCSOUT_NO ||
|
if (be.fcs_in != BR2684_FCSIN_NO || be.fcs_out != BR2684_FCSOUT_NO ||
|
be.fcs_auto || be.has_vpiid || be.send_padding || (be.encaps !=
|
be.fcs_auto || be.has_vpiid || be.send_padding || (be.encaps !=
|
BR2684_ENCAPS_VC && be.encaps != BR2684_ENCAPS_LLC) ||
|
BR2684_ENCAPS_VC && be.encaps != BR2684_ENCAPS_LLC) ||
|
be.min_size != 0) {
|
be.min_size != 0) {
|
err = -EINVAL;
|
err = -EINVAL;
|
goto error;
|
goto error;
|
}
|
}
|
brvcc = kmalloc(sizeof(struct br2684_vcc), GFP_KERNEL);
|
brvcc = kmalloc(sizeof(struct br2684_vcc), GFP_KERNEL);
|
if (!brvcc) {
|
if (!brvcc) {
|
err = -ENOMEM;
|
err = -ENOMEM;
|
goto error;
|
goto error;
|
}
|
}
|
memset(brvcc, 0, sizeof(struct br2684_vcc));
|
memset(brvcc, 0, sizeof(struct br2684_vcc));
|
DPRINTK("br2684_regvcc vcc=%p, encaps=%d, brvcc=%p\n", atmvcc, be.encaps,
|
DPRINTK("br2684_regvcc vcc=%p, encaps=%d, brvcc=%p\n", atmvcc, be.encaps,
|
brvcc);
|
brvcc);
|
if (list_empty(&brdev->brvccs) && !brdev->mac_was_set) {
|
if (list_empty(&brdev->brvccs) && !brdev->mac_was_set) {
|
unsigned char *esi = atmvcc->dev->esi;
|
unsigned char *esi = atmvcc->dev->esi;
|
if (esi[0] | esi[1] | esi[2] | esi[3] | esi[4] | esi[5])
|
if (esi[0] | esi[1] | esi[2] | esi[3] | esi[4] | esi[5])
|
memcpy(brdev->net_dev.dev_addr, esi,
|
memcpy(brdev->net_dev.dev_addr, esi,
|
brdev->net_dev.addr_len);
|
brdev->net_dev.addr_len);
|
else
|
else
|
brdev->net_dev.dev_addr[2] = 1;
|
brdev->net_dev.dev_addr[2] = 1;
|
}
|
}
|
list_add(&brvcc->brvccs, &brdev->brvccs);
|
list_add(&brvcc->brvccs, &brdev->brvccs);
|
write_unlock_irq(&devs_lock);
|
write_unlock_irq(&devs_lock);
|
brvcc->brdev = brdev;
|
brvcc->brdev = brdev;
|
brvcc->atmvcc = atmvcc;
|
brvcc->atmvcc = atmvcc;
|
atmvcc->user_back = brvcc;
|
atmvcc->user_back = brvcc;
|
brvcc->encaps = (enum br2684_encaps) be.encaps;
|
brvcc->encaps = (enum br2684_encaps) be.encaps;
|
brvcc->old_push = atmvcc->push;
|
brvcc->old_push = atmvcc->push;
|
barrier();
|
barrier();
|
atmvcc->push = br2684_push;
|
atmvcc->push = br2684_push;
|
skb_queue_head_init(©);
|
skb_queue_head_init(©);
|
skb_migrate(&atmvcc->sk->receive_queue, ©);
|
skb_migrate(&atmvcc->sk->receive_queue, ©);
|
while ((skb = skb_dequeue(©))) {
|
while ((skb = skb_dequeue(©))) {
|
BRPRIV(skb->dev)->stats.rx_bytes -= skb->len;
|
BRPRIV(skb->dev)->stats.rx_bytes -= skb->len;
|
BRPRIV(skb->dev)->stats.rx_packets--;
|
BRPRIV(skb->dev)->stats.rx_packets--;
|
br2684_push(atmvcc, skb);
|
br2684_push(atmvcc, skb);
|
}
|
}
|
return 0;
|
return 0;
|
error:
|
error:
|
write_unlock_irq(&devs_lock);
|
write_unlock_irq(&devs_lock);
|
MOD_DEC_USE_COUNT;
|
MOD_DEC_USE_COUNT;
|
return err;
|
return err;
|
}
|
}
|
|
|
static int br2684_create(unsigned long arg)
|
static int br2684_create(unsigned long arg)
|
{
|
{
|
int err;
|
int err;
|
struct br2684_dev *brdev;
|
struct br2684_dev *brdev;
|
struct atm_newif_br2684 ni;
|
struct atm_newif_br2684 ni;
|
|
|
DPRINTK("br2684_create\n");
|
DPRINTK("br2684_create\n");
|
/*
|
/*
|
* We track module use by vcc's NOT the devices they're on. We're
|
* We track module use by vcc's NOT the devices they're on. We're
|
* protected here against module death by the kernel_lock, but if
|
* protected here against module death by the kernel_lock, but if
|
* we need to sleep we should make sure that the module doesn't
|
* we need to sleep we should make sure that the module doesn't
|
* disappear under us.
|
* disappear under us.
|
*/
|
*/
|
MOD_INC_USE_COUNT;
|
MOD_INC_USE_COUNT;
|
if (copy_from_user(&ni, (void *) arg, sizeof ni)) {
|
if (copy_from_user(&ni, (void *) arg, sizeof ni)) {
|
MOD_DEC_USE_COUNT;
|
MOD_DEC_USE_COUNT;
|
return -EFAULT;
|
return -EFAULT;
|
}
|
}
|
if (ni.media != BR2684_MEDIA_ETHERNET || ni.mtu != 1500) {
|
if (ni.media != BR2684_MEDIA_ETHERNET || ni.mtu != 1500) {
|
MOD_DEC_USE_COUNT;
|
MOD_DEC_USE_COUNT;
|
return -EINVAL;
|
return -EINVAL;
|
}
|
}
|
if ((brdev = kmalloc(sizeof(struct br2684_dev), GFP_KERNEL)) == NULL) {
|
if ((brdev = kmalloc(sizeof(struct br2684_dev), GFP_KERNEL)) == NULL) {
|
MOD_DEC_USE_COUNT;
|
MOD_DEC_USE_COUNT;
|
return -ENOMEM;
|
return -ENOMEM;
|
}
|
}
|
memset(brdev, 0, sizeof(struct br2684_dev));
|
memset(brdev, 0, sizeof(struct br2684_dev));
|
INIT_LIST_HEAD(&brdev->brvccs);
|
INIT_LIST_HEAD(&brdev->brvccs);
|
|
|
write_lock_irq(&devs_lock);
|
write_lock_irq(&devs_lock);
|
brdev->number = list_empty(&br2684_devs) ? 1 :
|
brdev->number = list_empty(&br2684_devs) ? 1 :
|
list_entry_brdev(br2684_devs.prev)->number + 1;
|
list_entry_brdev(br2684_devs.prev)->number + 1;
|
list_add_tail(&brdev->br2684_devs, &br2684_devs);
|
list_add_tail(&brdev->br2684_devs, &br2684_devs);
|
write_unlock_irq(&devs_lock);
|
write_unlock_irq(&devs_lock);
|
|
|
if (ni.ifname[0] != '\0') {
|
if (ni.ifname[0] != '\0') {
|
memcpy(brdev->net_dev.name, ni.ifname,
|
memcpy(brdev->net_dev.name, ni.ifname,
|
sizeof(brdev->net_dev.name));
|
sizeof(brdev->net_dev.name));
|
brdev->net_dev.name[sizeof(brdev->net_dev.name) - 1] = '\0';
|
brdev->net_dev.name[sizeof(brdev->net_dev.name) - 1] = '\0';
|
} else
|
} else
|
sprintf(brdev->net_dev.name, "nas%d", brdev->number);
|
sprintf(brdev->net_dev.name, "nas%d", brdev->number);
|
DPRINTK("registered netdev %s\n", brdev->net_dev.name);
|
DPRINTK("registered netdev %s\n", brdev->net_dev.name);
|
ether_setup(&brdev->net_dev);
|
ether_setup(&brdev->net_dev);
|
brdev->mac_was_set = 0;
|
brdev->mac_was_set = 0;
|
#ifdef FASTER_VERSION
|
#ifdef FASTER_VERSION
|
my_eth_header = brdev->net_dev.hard_header;
|
my_eth_header = brdev->net_dev.hard_header;
|
brdev->net_dev.hard_header = br2684_header;
|
brdev->net_dev.hard_header = br2684_header;
|
my_eth_header_cache = brdev->net_dev.hard_header_cache;
|
my_eth_header_cache = brdev->net_dev.hard_header_cache;
|
brdev->net_dev.hard_header_cache = br2684_header_cache;
|
brdev->net_dev.hard_header_cache = br2684_header_cache;
|
brdev->net_dev.hard_header_len = sizeof(llc_oui_pid_pad) + ETH_HLEN; /* 10 + 14 */
|
brdev->net_dev.hard_header_len = sizeof(llc_oui_pid_pad) + ETH_HLEN; /* 10 + 14 */
|
#endif
|
#endif
|
my_eth_mac_addr = brdev->net_dev.set_mac_address;
|
my_eth_mac_addr = brdev->net_dev.set_mac_address;
|
brdev->net_dev.set_mac_address = br2684_mac_addr;
|
brdev->net_dev.set_mac_address = br2684_mac_addr;
|
brdev->net_dev.hard_start_xmit = br2684_start_xmit;
|
brdev->net_dev.hard_start_xmit = br2684_start_xmit;
|
brdev->net_dev.get_stats = br2684_get_stats;
|
brdev->net_dev.get_stats = br2684_get_stats;
|
|
|
/* open, stop, do_ioctl ? */
|
/* open, stop, do_ioctl ? */
|
err = register_netdev(&brdev->net_dev);
|
err = register_netdev(&brdev->net_dev);
|
MOD_DEC_USE_COUNT;
|
MOD_DEC_USE_COUNT;
|
if (err < 0) {
|
if (err < 0) {
|
printk(KERN_ERR "br2684_create: register_netdev failed\n");
|
printk(KERN_ERR "br2684_create: register_netdev failed\n");
|
write_lock_irq(&devs_lock);
|
write_lock_irq(&devs_lock);
|
list_del(&brdev->br2684_devs);
|
list_del(&brdev->br2684_devs);
|
write_unlock_irq(&devs_lock);
|
write_unlock_irq(&devs_lock);
|
kfree(brdev);
|
kfree(brdev);
|
return err;
|
return err;
|
}
|
}
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/*
|
/*
|
* This handles ioctls actually performed on our vcc - we must return
|
* This handles ioctls actually performed on our vcc - we must return
|
* -ENOIOCTLCMD for any unrecognized ioctl
|
* -ENOIOCTLCMD for any unrecognized ioctl
|
*/
|
*/
|
static int br2684_ioctl(struct atm_vcc *atmvcc, unsigned int cmd,
|
static int br2684_ioctl(struct atm_vcc *atmvcc, unsigned int cmd,
|
unsigned long arg)
|
unsigned long arg)
|
{
|
{
|
int err;
|
int err;
|
switch(cmd) {
|
switch(cmd) {
|
case ATM_SETBACKEND:
|
case ATM_SETBACKEND:
|
case ATM_NEWBACKENDIF: {
|
case ATM_NEWBACKENDIF: {
|
atm_backend_t b;
|
atm_backend_t b;
|
MOD_INC_USE_COUNT;
|
MOD_INC_USE_COUNT;
|
err = get_user(b, (atm_backend_t *) arg);
|
err = get_user(b, (atm_backend_t *) arg);
|
MOD_DEC_USE_COUNT;
|
MOD_DEC_USE_COUNT;
|
if (err)
|
if (err)
|
return -EFAULT;
|
return -EFAULT;
|
if (b != ATM_BACKEND_BR2684)
|
if (b != ATM_BACKEND_BR2684)
|
return -ENOIOCTLCMD;
|
return -ENOIOCTLCMD;
|
if (!capable(CAP_NET_ADMIN))
|
if (!capable(CAP_NET_ADMIN))
|
return -EPERM;
|
return -EPERM;
|
if (cmd == ATM_SETBACKEND)
|
if (cmd == ATM_SETBACKEND)
|
return br2684_regvcc(atmvcc, arg);
|
return br2684_regvcc(atmvcc, arg);
|
else
|
else
|
return br2684_create(arg);
|
return br2684_create(arg);
|
}
|
}
|
#ifdef CONFIG_ATM_BR2684_IPFILTER
|
#ifdef CONFIG_ATM_BR2684_IPFILTER
|
case BR2684_SETFILT:
|
case BR2684_SETFILT:
|
if (atmvcc->push != br2684_push)
|
if (atmvcc->push != br2684_push)
|
return -ENOIOCTLCMD;
|
return -ENOIOCTLCMD;
|
if (!capable(CAP_NET_ADMIN))
|
if (!capable(CAP_NET_ADMIN))
|
return -EPERM;
|
return -EPERM;
|
MOD_INC_USE_COUNT;
|
MOD_INC_USE_COUNT;
|
err = br2684_setfilt(atmvcc, arg);
|
err = br2684_setfilt(atmvcc, arg);
|
MOD_DEC_USE_COUNT;
|
MOD_DEC_USE_COUNT;
|
return err;
|
return err;
|
#endif /* CONFIG_ATM_BR2684_IPFILTER */
|
#endif /* CONFIG_ATM_BR2684_IPFILTER */
|
}
|
}
|
return -ENOIOCTLCMD;
|
return -ENOIOCTLCMD;
|
}
|
}
|
|
|
#ifdef CONFIG_PROC_FS
|
#ifdef CONFIG_PROC_FS
|
/* Never put more than 256 bytes in at once */
|
/* Never put more than 256 bytes in at once */
|
static int br2684_proc_engine(loff_t pos, char *buf)
|
static int br2684_proc_engine(loff_t pos, char *buf)
|
{
|
{
|
struct list_head *lhd, *lhc;
|
struct list_head *lhd, *lhc;
|
struct br2684_dev *brdev;
|
struct br2684_dev *brdev;
|
struct br2684_vcc *brvcc;
|
struct br2684_vcc *brvcc;
|
list_for_each(lhd, &br2684_devs) {
|
list_for_each(lhd, &br2684_devs) {
|
brdev = list_entry_brdev(lhd);
|
brdev = list_entry_brdev(lhd);
|
if (pos-- == 0)
|
if (pos-- == 0)
|
return sprintf(buf, "dev %.16s: num=%d, mac=%02X:%02X:"
|
return sprintf(buf, "dev %.16s: num=%d, mac=%02X:%02X:"
|
"%02X:%02X:%02X:%02X (%s)\n", brdev->net_dev.name,
|
"%02X:%02X:%02X:%02X (%s)\n", brdev->net_dev.name,
|
brdev->number,
|
brdev->number,
|
brdev->net_dev.dev_addr[0],
|
brdev->net_dev.dev_addr[0],
|
brdev->net_dev.dev_addr[1],
|
brdev->net_dev.dev_addr[1],
|
brdev->net_dev.dev_addr[2],
|
brdev->net_dev.dev_addr[2],
|
brdev->net_dev.dev_addr[3],
|
brdev->net_dev.dev_addr[3],
|
brdev->net_dev.dev_addr[4],
|
brdev->net_dev.dev_addr[4],
|
brdev->net_dev.dev_addr[5],
|
brdev->net_dev.dev_addr[5],
|
brdev->mac_was_set ? "set" : "auto");
|
brdev->mac_was_set ? "set" : "auto");
|
list_for_each(lhc, &brdev->brvccs) {
|
list_for_each(lhc, &brdev->brvccs) {
|
brvcc = list_entry_brvcc(lhc);
|
brvcc = list_entry_brvcc(lhc);
|
if (pos-- == 0)
|
if (pos-- == 0)
|
return sprintf(buf, " vcc %d.%d.%d: encaps=%s"
|
return sprintf(buf, " vcc %d.%d.%d: encaps=%s"
|
#ifndef FASTER_VERSION
|
#ifndef FASTER_VERSION
|
", failed copies %u/%u"
|
", failed copies %u/%u"
|
#endif /* FASTER_VERSION */
|
#endif /* FASTER_VERSION */
|
"\n", brvcc->atmvcc->dev->number,
|
"\n", brvcc->atmvcc->dev->number,
|
brvcc->atmvcc->vpi, brvcc->atmvcc->vci,
|
brvcc->atmvcc->vpi, brvcc->atmvcc->vci,
|
(brvcc->encaps == e_llc) ? "LLC" : "VC"
|
(brvcc->encaps == e_llc) ? "LLC" : "VC"
|
#ifndef FASTER_VERSION
|
#ifndef FASTER_VERSION
|
, brvcc->copies_failed
|
, brvcc->copies_failed
|
, brvcc->copies_needed
|
, brvcc->copies_needed
|
#endif /* FASTER_VERSION */
|
#endif /* FASTER_VERSION */
|
);
|
);
|
#ifdef CONFIG_ATM_BR2684_IPFILTER
|
#ifdef CONFIG_ATM_BR2684_IPFILTER
|
#define b1(var, byte) ((u8 *) &brvcc->filter.var)[byte]
|
#define b1(var, byte) ((u8 *) &brvcc->filter.var)[byte]
|
#define bs(var) b1(var, 0), b1(var, 1), b1(var, 2), b1(var, 3)
|
#define bs(var) b1(var, 0), b1(var, 1), b1(var, 2), b1(var, 3)
|
if (brvcc->filter.netmask != 0 && pos-- == 0)
|
if (brvcc->filter.netmask != 0 && pos-- == 0)
|
return sprintf(buf, " filter=%d.%d.%d.%d/"
|
return sprintf(buf, " filter=%d.%d.%d.%d/"
|
"%d.%d.%d.%d\n", bs(prefix), bs(netmask));
|
"%d.%d.%d.%d\n", bs(prefix), bs(netmask));
|
#undef bs
|
#undef bs
|
#undef b1
|
#undef b1
|
#endif /* CONFIG_ATM_BR2684_IPFILTER */
|
#endif /* CONFIG_ATM_BR2684_IPFILTER */
|
}
|
}
|
}
|
}
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static ssize_t br2684_proc_read(struct file *file, char *buf, size_t count,
|
static ssize_t br2684_proc_read(struct file *file, char *buf, size_t count,
|
loff_t *pos)
|
loff_t *pos)
|
{
|
{
|
unsigned long page;
|
unsigned long page;
|
int len = 0, x, left;
|
int len = 0, x, left;
|
page = get_free_page(GFP_KERNEL);
|
page = get_free_page(GFP_KERNEL);
|
if (!page)
|
if (!page)
|
return -ENOMEM;
|
return -ENOMEM;
|
left = PAGE_SIZE - 256;
|
left = PAGE_SIZE - 256;
|
if (count < left)
|
if (count < left)
|
left = count;
|
left = count;
|
read_lock(&devs_lock);
|
read_lock(&devs_lock);
|
for (;;) {
|
for (;;) {
|
x = br2684_proc_engine(*pos, &((char *) page)[len]);
|
x = br2684_proc_engine(*pos, &((char *) page)[len]);
|
if (x == 0)
|
if (x == 0)
|
break;
|
break;
|
if (x > left)
|
if (x > left)
|
/*
|
/*
|
* This should only happen if the user passed in
|
* This should only happen if the user passed in
|
* a "count" too small for even one line
|
* a "count" too small for even one line
|
*/
|
*/
|
x = -EINVAL;
|
x = -EINVAL;
|
if (x < 0) {
|
if (x < 0) {
|
len = x;
|
len = x;
|
break;
|
break;
|
}
|
}
|
len += x;
|
len += x;
|
left -= x;
|
left -= x;
|
(*pos)++;
|
(*pos)++;
|
if (left < 256)
|
if (left < 256)
|
break;
|
break;
|
}
|
}
|
read_unlock(&devs_lock);
|
read_unlock(&devs_lock);
|
if (len > 0 && copy_to_user(buf, (char *) page, len))
|
if (len > 0 && copy_to_user(buf, (char *) page, len))
|
len = -EFAULT;
|
len = -EFAULT;
|
free_page(page);
|
free_page(page);
|
return len;
|
return len;
|
}
|
}
|
|
|
static struct file_operations br2684_proc_operations = {
|
static struct file_operations br2684_proc_operations = {
|
read: br2684_proc_read,
|
read: br2684_proc_read,
|
};
|
};
|
|
|
extern struct proc_dir_entry *atm_proc_root; /* from proc.c */
|
extern struct proc_dir_entry *atm_proc_root; /* from proc.c */
|
#endif /* CONFIG_PROC_FS */
|
#endif /* CONFIG_PROC_FS */
|
|
|
/* the following avoids some spurious warnings from the compiler */
|
/* the following avoids some spurious warnings from the compiler */
|
#define UNUSED __attribute__((unused))
|
#define UNUSED __attribute__((unused))
|
|
|
static int __init UNUSED br2684_init(void)
|
static int __init UNUSED br2684_init(void)
|
{
|
{
|
#ifdef CONFIG_PROC_FS
|
#ifdef CONFIG_PROC_FS
|
struct proc_dir_entry *p;
|
struct proc_dir_entry *p;
|
if ((p = create_proc_entry("br2684", 0, atm_proc_root)) == NULL)
|
if ((p = create_proc_entry("br2684", 0, atm_proc_root)) == NULL)
|
return -ENOMEM;
|
return -ENOMEM;
|
p->proc_fops = &br2684_proc_operations;
|
p->proc_fops = &br2684_proc_operations;
|
#endif /* CONFIG_PROC_FS */
|
#endif /* CONFIG_PROC_FS */
|
br2684_ioctl_set(br2684_ioctl);
|
br2684_ioctl_set(br2684_ioctl);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static void __exit UNUSED br2684_exit(void)
|
static void __exit UNUSED br2684_exit(void)
|
{
|
{
|
struct br2684_dev *brdev;
|
struct br2684_dev *brdev;
|
br2684_ioctl_set(NULL);
|
br2684_ioctl_set(NULL);
|
#ifdef CONFIG_PROC_FS
|
#ifdef CONFIG_PROC_FS
|
remove_proc_entry("br2684", atm_proc_root);
|
remove_proc_entry("br2684", atm_proc_root);
|
#endif /* CONFIG_PROC_FS */
|
#endif /* CONFIG_PROC_FS */
|
while (!list_empty(&br2684_devs)) {
|
while (!list_empty(&br2684_devs)) {
|
brdev = list_entry_brdev(br2684_devs.next);
|
brdev = list_entry_brdev(br2684_devs.next);
|
unregister_netdev(&brdev->net_dev);
|
unregister_netdev(&brdev->net_dev);
|
list_del(&brdev->br2684_devs);
|
list_del(&brdev->br2684_devs);
|
kfree(brdev);
|
kfree(brdev);
|
}
|
}
|
}
|
}
|
|
|
module_init(br2684_init);
|
module_init(br2684_init);
|
module_exit(br2684_exit);
|
module_exit(br2684_exit);
|
|
|
MODULE_AUTHOR("Marcell GAL");
|
MODULE_AUTHOR("Marcell GAL");
|
MODULE_DESCRIPTION("RFC2684 bridged protocols over ATM/AAL5");
|
MODULE_DESCRIPTION("RFC2684 bridged protocols over ATM/AAL5");
|
MODULE_LICENSE("GPL");
|
MODULE_LICENSE("GPL");
|
|
|
