Add routed support to br2684

Signed-off-by: Juan I. Gonzalez <juan.i.gonzalez at subdown dot net>

SVN-Revision: 10710

1 files changed, 730 insertions, 0 deletions

diff --git a/target/linux/generic-2.6/patches-2.6.24/601-br2684-routed-support.patch b/target/linux/generic-2.6/patches-2.6.24/601-br2684-routed-support.patch
new file mode 100644
index 0000000..88a27f3
--- /dev/null
+++ b/target/linux/generic-2.6/patches-2.6.24/601-br2684-routed-support.patch
@@ -0,0 +1,730 @@
+diff -Nur linux-2.6.24.2/include/linux/atmbr2684.h linux-2.6.24.2-copy/include/linux/atmbr2684.h
+--- linux-2.6.24.2/include/linux/atmbr2684.h	2008-02-11 05:51:11.000000000 +0000
++++ linux-2.6.24.2-copy/include/linux/atmbr2684.h	2008-03-27 01:08:42.000000000 +0000
+@@ -14,6 +14,9 @@
+ #define BR2684_MEDIA_FDDI	(3)
+ #define BR2684_MEDIA_802_6	(4)	/* 802.6 */
+ 
++					/* used only at device creation:  */
++#define BR2684_FLAG_ROUTED	(1<<16)	/* payload is routed, not bridged */
++
+ /*
+  * Is there FCS inbound on this VC?  This currently isn't supported.
+  */
+@@ -36,15 +39,22 @@
+ #define BR2684_ENCAPS_AUTODETECT (2)	/* Unsuported */
+ 
+ /*
++ * Is this VC bridged or routed?
++ */
++
++#define BR2684_PAYLOAD_ROUTED   (0)
++#define BR2684_PAYLOAD_BRIDGED  (1)
++
++/*
+  * This is for the ATM_NEWBACKENDIF call - these are like socket families:
+  * the first element of the structure is the backend number and the rest
+  * is per-backend specific
+  */
+ struct atm_newif_br2684 {
+-	atm_backend_t	backend_num;	/* ATM_BACKEND_BR2684 */
+-	int		media;		/* BR2684_MEDIA_* */
+-	char		ifname[IFNAMSIZ];
+-	int		mtu;
++	atm_backend_t backend_num;	/* ATM_BACKEND_BR2684 */
++	int media;		/* BR2684_MEDIA_*, flags in upper bits */
++	char ifname[IFNAMSIZ];
++	int mtu;
+ };
+ 
+ /*
+@@ -55,10 +65,10 @@
+ #define BR2684_FIND_BYNUM	(1)
+ #define BR2684_FIND_BYIFNAME	(2)
+ struct br2684_if_spec {
+-	int method;			/* BR2684_FIND_* */
++	int method;		/* BR2684_FIND_* */
+ 	union {
+-		char		ifname[IFNAMSIZ];
+-		int		devnum;
++		char ifname[IFNAMSIZ];
++		int devnum;
+ 	} spec;
+ };
+ 
+@@ -68,16 +78,16 @@
+  * is per-backend specific
+  */
+ struct atm_backend_br2684 {
+-	atm_backend_t	backend_num;	/* ATM_BACKEND_BR2684 */
++	atm_backend_t backend_num;	/* ATM_BACKEND_BR2684 */
+ 	struct br2684_if_spec ifspec;
+-	int	fcs_in;		/* BR2684_FCSIN_* */
+-	int	fcs_out;	/* BR2684_FCSOUT_* */
+-	int	fcs_auto;	/* 1: fcs_{in,out} disabled if no FCS rx'ed */
+-	int	encaps;		/* BR2684_ENCAPS_* */
+-	int	has_vpiid;	/* 1: use vpn_id - Unsupported */
+-	__u8	vpn_id[7];
+-	int	send_padding;	/* unsupported */
+-	int	min_size;	/* we will pad smaller packets than this */
++	int fcs_in;		/* BR2684_FCSIN_* */
++	int fcs_out;		/* BR2684_FCSOUT_* */
++	int fcs_auto;		/* 1: fcs_{in,out} disabled if no FCS rx'ed */
++	int encaps;		/* BR2684_ENCAPS_* */
++	int has_vpiid;		/* 1: use vpn_id - Unsupported */
++	__u8 vpn_id[7];
++	int send_padding;	/* unsupported */
++	int min_size;		/* we will pad smaller packets than this */
+ };
+ 
+ /*
+@@ -86,8 +96,8 @@
+  * efficient per-if in/out filters, this support will be removed
+  */
+ struct br2684_filter {
+-	__be32	prefix;		/* network byte order */
+-	__be32	netmask;	/* 0 = disable filter */
++	__be32 prefix;		/* network byte order */
++	__be32 netmask;		/* 0 = disable filter */
+ };
+ 
+ struct br2684_filter_set {
+@@ -95,7 +105,13 @@
+ 	struct br2684_filter filter;
+ };
+ 
++enum br2684_payload {
++	p_routed = BR2684_PAYLOAD_ROUTED,
++	p_bridged = BR2684_PAYLOAD_BRIDGED,
++};
++
+ #define BR2684_SETFILT	_IOW( 'a', ATMIOC_BACKEND + 0, \
+ 				struct br2684_filter_set)
+ 
+ #endif /* _LINUX_ATMBR2684_H */
++
+diff -Nur linux-2.6.24.2/net/atm/br2684.c linux-2.6.24.2-copy/net/atm/br2684.c
+--- linux-2.6.24.2/net/atm/br2684.c	2008-02-11 05:51:11.000000000 +0000
++++ linux-2.6.24.2-copy/net/atm/br2684.c	2008-03-27 03:24:17.000000000 +0000
+@@ -1,8 +1,10 @@
+ /*
+-Experimental ethernet netdevice using ATM AAL5 as underlying carrier
+-(RFC1483 obsoleted by RFC2684) for Linux 2.4
+-Author: Marcell GAL, 2000, XDSL Ltd, Hungary
+-*/
++ * Ethernet netdevice using ATM AAL5 as underlying carrier
++ * (RFC1483 obsoleted by RFC2684) for Linux
++ *
++ * Authors: Marcell GAL, 2000, XDSL Ltd, Hungary
++ *          Eric Kinzie, 2006-2007, US Naval Research Laboratory
++ */
+ 
+ #include <linux/module.h>
+ #include <linux/init.h>
+@@ -39,21 +41,35 @@
+ #define skb_debug(skb)	do {} while (0)
+ #endif
+ 
++#define BR2684_ETHERTYPE_LEN	2
++#define BR2684_PAD_LEN		2
++
++#define LLC		0xaa, 0xaa, 0x03
++#define SNAP_BRIDGED	0x00, 0x80, 0xc2
++#define SNAP_ROUTED	0x00, 0x00, 0x00
++#define PID_ETHERNET	0x00, 0x07
++#define ETHERTYPE_IPV4	0x08, 0x00
++#define ETHERTYPE_IPV6	0x86, 0xdd
++#define PAD_BRIDGED	0x00, 0x00
++
++static unsigned char ethertype_ipv4[] = { ETHERTYPE_IPV4 };
++static unsigned char ethertype_ipv6[] = { ETHERTYPE_IPV6 };
+ static unsigned char llc_oui_pid_pad[] =
+-    { 0xAA, 0xAA, 0x03, 0x00, 0x80, 0xC2, 0x00, 0x07, 0x00, 0x00 };
+-#define PADLEN	(2)
++			{ LLC, SNAP_BRIDGED, PID_ETHERNET, PAD_BRIDGED };
++static unsigned char llc_oui_ipv4[] = { LLC, SNAP_ROUTED, ETHERTYPE_IPV4 };
++static unsigned char llc_oui_ipv6[] = { LLC, SNAP_ROUTED, ETHERTYPE_IPV6 };
+ 
+ enum br2684_encaps {
+-	e_vc  = BR2684_ENCAPS_VC,
++	e_vc = BR2684_ENCAPS_VC,
+ 	e_llc = BR2684_ENCAPS_LLC,
+ };
+ 
+ struct br2684_vcc {
+-	struct atm_vcc  *atmvcc;
++	struct atm_vcc *atmvcc;
+ 	struct net_device *device;
+-	/* keep old push,pop functions for chaining */
+-	void (*old_push)(struct atm_vcc *vcc,struct sk_buff *skb);
+-	/* void (*old_pop)(struct atm_vcc *vcc,struct sk_buff *skb); */
++	/* keep old push, pop functions for chaining */
++	void (*old_push) (struct atm_vcc * vcc, struct sk_buff * skb);
++	/* void (*old_pop)(struct atm_vcc *vcc, struct sk_buff *skb); */
+ 	enum br2684_encaps encaps;
+ 	struct list_head brvccs;
+ #ifdef CONFIG_ATM_BR2684_IPFILTER
+@@ -66,9 +82,10 @@
+ 	struct net_device *net_dev;
+ 	struct list_head br2684_devs;
+ 	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;
+ 	int mac_was_set;
++	enum br2684_payload payload;
+ };
+ 
+ /*
+@@ -84,7 +101,7 @@
+ 
+ static inline struct br2684_dev *BRPRIV(const struct net_device *net_dev)
+ {
+-	return (struct br2684_dev *) net_dev->priv;
++	return (struct br2684_dev *)net_dev->priv;
+ }
+ 
+ static inline struct net_device *list_entry_brdev(const struct list_head *le)
+@@ -94,7 +111,7 @@
+ 
+ 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)
+@@ -132,10 +149,11 @@
+  * otherwise false
+  */
+ 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;
+ 	int minheadroom = (brvcc->encaps == e_llc) ? 10 : 2;
++
+ 	if (skb_headroom(skb) < minheadroom) {
+ 		struct sk_buff *skb2 = skb_realloc_headroom(skb, minheadroom);
+ 		brvcc->copies_needed++;
+@@ -146,23 +164,48 @@
+ 		}
+ 		skb = skb2;
+ 	}
+-	skb_push(skb, minheadroom);
+-	if (brvcc->encaps == e_llc)
+-		skb_copy_to_linear_data(skb, llc_oui_pid_pad, 10);
+-	else
+-		memset(skb->data, 0, 2);
++
++	if (brvcc->encaps == e_llc) {
++		if (brdev->payload == p_bridged) {
++			skb_push(skb, sizeof(llc_oui_pid_pad));
++			skb_copy_to_linear_data(skb, llc_oui_pid_pad,
++						sizeof(llc_oui_pid_pad));
++		} else if (brdev->payload == p_routed) {
++			unsigned short prot = ntohs(skb->protocol);
++
++			skb_push(skb, sizeof(llc_oui_ipv4));
++			switch (prot) {
++			case ETH_P_IP:
++				skb_copy_to_linear_data(skb, llc_oui_ipv4,
++							sizeof(llc_oui_ipv4));
++				break;
++			case ETH_P_IPV6:
++				skb_copy_to_linear_data(skb, llc_oui_ipv6,
++							sizeof(llc_oui_ipv6));
++				break;
++			default:
++				dev_kfree_skb(skb);
++				return 0;
++			}
++		}
++	} else {
++		skb_push(skb, 2);
++		if (brdev->payload == p_bridged)
++			memset(skb->data, 0, 2);
++	}
+ 	skb_debug(skb);
+ 
+ 	ATM_SKB(skb)->vcc = atmvcc = brvcc->atmvcc;
+ 	pr_debug("atm_skb(%p)->vcc(%p)->dev(%p)\n", skb, atmvcc, atmvcc->dev);
+ 	if (!atm_may_send(atmvcc, skb->truesize)) {
+-		/* we free this here for now, because we cannot know in a higher
+-			layer whether the skb point it supplied wasn't freed yet.
+-			now, it always is.
+-		*/
++		/*
++		 * We free this here for now, because we cannot know in a higher
++		 * layer whether the skb pointer it supplied wasn't freed yet.
++		 * Now, it always is.
++		 */
+ 		dev_kfree_skb(skb);
+ 		return 0;
+-		}
++	}
+ 	atomic_add(skb->truesize, &sk_atm(atmvcc)->sk_wmem_alloc);
+ 	ATM_SKB(skb)->atm_options = atmvcc->atm_options;
+ 	brdev->stats.tx_packets++;
+@@ -172,10 +215,9 @@
+ }
+ 
+ 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 :
+-	    list_entry_brvcc(brdev->brvccs.next); /* 1 vcc/dev right now */
++	return list_empty(&brdev->brvccs) ? NULL : list_entry_brvcc(brdev->brvccs.next);	/* 1 vcc/dev right now */
+ }
+ 
+ static int br2684_start_xmit(struct sk_buff *skb, struct net_device *dev)
+@@ -199,11 +241,10 @@
+ 		/*
+ 		 * We should probably use netif_*_queue() here, but that
+ 		 * 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);
+-		*/
+ 		brdev->stats.tx_errors++;
+ 		brdev->stats.tx_fifo_errors++;
+ 	}
+@@ -217,12 +258,11 @@
+ 	return &BRPRIV(dev)->stats;
+ }
+ 
+-
+ /*
+  * 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
+  */
+-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)
+ {
+ 	int err = my_eth_mac_addr(dev, p);
+@@ -233,7 +273,7 @@
+ 
+ #ifdef CONFIG_ATM_BR2684_IPFILTER
+ /* this IOCTL is experimental. */
+-static int br2684_setfilt(struct atm_vcc *atmvcc, void __user *arg)
++static int br2684_setfilt(struct atm_vcc *atmvcc, void __user * arg)
+ {
+ 	struct br2684_vcc *brvcc;
+ 	struct br2684_filter_set fs;
+@@ -243,13 +283,12 @@
+ 	if (fs.ifspec.method != BR2684_FIND_BYNOTHING) {
+ 		/*
+ 		 * This is really a per-vcc thing, but we can also search
+-		 * by device
++		 * by device.
+ 		 */
+ 		struct br2684_dev *brdev;
+ 		read_lock(&devs_lock);
+ 		brdev = BRPRIV(br2684_find_dev(&fs.ifspec));
+-		if (brdev == NULL || list_empty(&brdev->brvccs) ||
+-		    brdev->brvccs.next != brdev->brvccs.prev)  /* >1 VCC */
++		if (brdev == NULL || list_empty(&brdev->brvccs) || brdev->brvccs.next != brdev->brvccs.prev)	/* >1 VCC */
+ 			brvcc = NULL;
+ 		else
+ 			brvcc = list_entry_brvcc(brdev->brvccs.next);
+@@ -267,15 +306,16 @@
+ packet_fails_filter(__be16 type, struct br2684_vcc *brvcc, struct sk_buff *skb)
+ {
+ 	if (brvcc->filter.netmask == 0)
+-		return 0;			/* no filter in place */
++		return 0;	/* no filter in place */
+ 	if (type == htons(ETH_P_IP) &&
+-	    (((struct iphdr *) (skb->data))->daddr & brvcc->filter.
++	    (((struct iphdr *)(skb->data))->daddr & brvcc->filter.
+ 	     netmask) == brvcc->filter.prefix)
+ 		return 0;
+ 	if (type == htons(ETH_P_ARP))
+ 		return 0;
+-	/* TODO: we should probably filter ARPs too.. don't want to have
+-	 *   them returning values that don't make sense, or is that ok?
++	/*
++	 * TODO: we should probably filter ARPs too.. don't want to have
++	 * them returning values that don't make sense, or is that ok?
+ 	 */
+ 	return 1;		/* drop */
+ }
+@@ -299,7 +339,6 @@
+ 	struct br2684_vcc *brvcc = BR2684_VCC(atmvcc);
+ 	struct net_device *net_dev = brvcc->device;
+ 	struct br2684_dev *brdev = BRPRIV(net_dev);
+-	int plen = sizeof(llc_oui_pid_pad) + ETH_HLEN;
+ 
+ 	pr_debug("br2684_push\n");
+ 
+@@ -320,35 +359,58 @@
+ 	atm_return(atmvcc, skb->truesize);
+ 	pr_debug("skb from brdev %p\n", brdev);
+ 	if (brvcc->encaps == e_llc) {
+-		/* let us waste some time for checking the encapsulation.
+-		   Note, that only 7 char is checked so frames with a valid FCS
+-		   are also accepted (but FCS is not checked of course) */
+-		if (memcmp(skb->data, llc_oui_pid_pad, 7)) {
++
++		if (skb->len > 7 && skb->data[7] == 0x01)
++			__skb_trim(skb, skb->len - 4);
++
++		/* accept packets that have "ipv[46]" in the snap header */
++		if ((skb->len >= (sizeof(llc_oui_ipv4)))
++		    &&
++		    (memcmp
++		     (skb->data, llc_oui_ipv4,
++		      sizeof(llc_oui_ipv4) - BR2684_ETHERTYPE_LEN) == 0)) {
++			if (memcmp
++			    (skb->data + 6, ethertype_ipv6,
++			     sizeof(ethertype_ipv6)) == 0)
++				skb->protocol = __constant_htons(ETH_P_IPV6);
++			else if (memcmp
++				 (skb->data + 6, ethertype_ipv4,
++				  sizeof(ethertype_ipv4)) == 0)
++				skb->protocol = __constant_htons(ETH_P_IP);
++			else {
++				brdev->stats.rx_errors++;
++				dev_kfree_skb(skb);
++				return;
++			}
++			skb_pull(skb, sizeof(llc_oui_ipv4));
++			skb_reset_network_header(skb);
++			skb->pkt_type = PACKET_HOST;
++			/*
++			 * Let us waste some time for checking the encapsulation.
++			 * Note, that only 7 char is checked so frames with a valid FCS
++			 * are also accepted (but FCS is not checked of course).
++			 */
++		} else if ((skb->len >= sizeof(llc_oui_pid_pad)) &&
++			   (memcmp(skb->data, llc_oui_pid_pad, 7) == 0)) {
++			skb_pull(skb, sizeof(llc_oui_pid_pad));
++			skb->protocol = eth_type_trans(skb, net_dev);
++		} else {
+ 			brdev->stats.rx_errors++;
+ 			dev_kfree_skb(skb);
+ 			return;
+ 		}
+ 
+-		/* Strip FCS if present */
+-		if (skb->len > 7 && skb->data[7] == 0x01)
+-			__skb_trim(skb, skb->len - 4);
+ 	} else {
+-		plen = PADLEN + ETH_HLEN;	/* pad, dstmac,srcmac, ethtype */
+ 		/* first 2 chars should be 0 */
+ 		if (*((u16 *) (skb->data)) != 0) {
+ 			brdev->stats.rx_errors++;
+ 			dev_kfree_skb(skb);
+ 			return;
+ 		}
+-	}
+-	if (skb->len < plen) {
+-		brdev->stats.rx_errors++;
+-		dev_kfree_skb(skb);	/* dev_ not needed? */
+-		return;
++		skb_pull(skb, BR2684_PAD_LEN + ETH_HLEN);	/* pad, dstmac, srcmac, ethtype */
++		skb->protocol = eth_type_trans(skb, net_dev);
+ 	}
+ 
+-	skb_pull(skb, plen - ETH_HLEN);
+-	skb->protocol = eth_type_trans(skb, net_dev);
+ #ifdef CONFIG_ATM_BR2684_IPFILTER
+ 	if (unlikely(packet_fails_filter(skb->protocol, brvcc, skb))) {
+ 		brdev->stats.rx_dropped++;
+@@ -372,11 +434,12 @@
+ 	netif_rx(skb);
+ }
+ 
+-static int br2684_regvcc(struct atm_vcc *atmvcc, void __user *arg)
++/*
++ * Assign a vcc to a dev
++ * Note: we do not have explicit unassign, but look at _push()
++ */
++static int br2684_regvcc(struct atm_vcc *atmvcc, void __user * arg)
+ {
+-/* assign a vcc to a dev
+-Note: we do not have explicit unassign, but look at _push()
+-*/
+ 	int err;
+ 	struct br2684_vcc *brvcc;
+ 	struct sk_buff *skb;
+@@ -395,7 +458,7 @@
+ 	net_dev = br2684_find_dev(&be.ifspec);
+ 	if (net_dev == NULL) {
+ 		printk(KERN_ERR
+-		    "br2684: tried to attach to non-existant device\n");
++		       "br2684: tried to attach to non-existant device\n");
+ 		err = -ENXIO;
+ 		goto error;
+ 	}
+@@ -411,13 +474,15 @@
+ 	}
+ 	if (be.fcs_in != BR2684_FCSIN_NO || be.fcs_out != BR2684_FCSOUT_NO ||
+ 	    be.fcs_auto || be.has_vpiid || be.send_padding || (be.encaps !=
+-	    BR2684_ENCAPS_VC && be.encaps != BR2684_ENCAPS_LLC) ||
+-	    be.min_size != 0) {
++							       BR2684_ENCAPS_VC
++							       && be.encaps !=
++							       BR2684_ENCAPS_LLC)
++	    || be.min_size != 0) {
+ 		err = -EINVAL;
+ 		goto error;
+ 	}
+-	pr_debug("br2684_regvcc vcc=%p, encaps=%d, brvcc=%p\n", atmvcc, be.encaps,
+-		brvcc);
++	pr_debug("br2684_regvcc vcc=%p, encaps=%d, brvcc=%p\n", atmvcc,
++		 be.encaps, brvcc);
+ 	if (list_empty(&brdev->brvccs) && !brdev->mac_was_set) {
+ 		unsigned char *esi = atmvcc->dev->esi;
+ 		if (esi[0] | esi[1] | esi[2] | esi[3] | esi[4] | esi[5])
+@@ -430,7 +495,7 @@
+ 	brvcc->device = net_dev;
+ 	brvcc->atmvcc = atmvcc;
+ 	atmvcc->user_back = brvcc;
+-	brvcc->encaps = (enum br2684_encaps) be.encaps;
++	brvcc->encaps = (enum br2684_encaps)be.encaps;
+ 	brvcc->old_push = atmvcc->push;
+ 	barrier();
+ 	atmvcc->push = br2684_push;
+@@ -461,7 +526,7 @@
+ 	}
+ 	__module_get(THIS_MODULE);
+ 	return 0;
+-    error:
++      error:
+ 	write_unlock_irq(&devs_lock);
+ 	kfree(brvcc);
+ 	return err;
+@@ -482,25 +547,52 @@
+ 	INIT_LIST_HEAD(&brdev->brvccs);
+ }
+ 
+-static int br2684_create(void __user *arg)
++static void br2684_setup_routed(struct net_device *netdev)
++{
++	struct br2684_dev *brdev = BRPRIV(netdev);
++	brdev->net_dev = netdev;
++
++	netdev->hard_header_len = 0;
++	my_eth_mac_addr = netdev->set_mac_address;
++	netdev->set_mac_address = br2684_mac_addr;
++	netdev->hard_start_xmit = br2684_start_xmit;
++	netdev->get_stats = br2684_get_stats;
++	netdev->addr_len = 0;
++	netdev->mtu = 1500;
++	netdev->type = ARPHRD_PPP;
++	netdev->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
++	netdev->tx_queue_len = 100;
++	INIT_LIST_HEAD(&brdev->brvccs);
++}
++
++static int br2684_create(void __user * arg)
+ {
+ 	int err;
+ 	struct net_device *netdev;
+ 	struct br2684_dev *brdev;
+ 	struct atm_newif_br2684 ni;
++	enum br2684_payload payload;
+ 
+ 	pr_debug("br2684_create\n");
+ 
+ 	if (copy_from_user(&ni, arg, sizeof ni)) {
+ 		return -EFAULT;
+ 	}
++
++	if (ni.media & BR2684_FLAG_ROUTED)
++		payload = p_routed;
++	else
++		payload = p_bridged;
++	ni.media &= 0xffff;	/* strip flags */
++
+ 	if (ni.media != BR2684_MEDIA_ETHERNET || ni.mtu != 1500) {
+ 		return -EINVAL;
+ 	}
+ 
+ 	netdev = alloc_netdev(sizeof(struct br2684_dev),
+ 			      ni.ifname[0] ? ni.ifname : "nas%d",
+-			      br2684_setup);
++			      (payload == p_routed) ?
++			      br2684_setup_routed : br2684_setup);
+ 	if (!netdev)
+ 		return -ENOMEM;
+ 
+@@ -516,6 +608,7 @@
+ 	}
+ 
+ 	write_lock_irq(&devs_lock);
++	brdev->payload = payload;
+ 	brdev->number = list_empty(&br2684_devs) ? 1 :
+ 	    BRPRIV(list_entry_brdev(br2684_devs.prev))->number + 1;
+ 	list_add_tail(&brdev->br2684_devs, &br2684_devs);
+@@ -528,16 +621,16 @@
+  * -ENOIOCTLCMD for any unrecognized ioctl
+  */
+ static int br2684_ioctl(struct socket *sock, unsigned int cmd,
+-	unsigned long arg)
++			unsigned long arg)
+ {
+ 	struct atm_vcc *atmvcc = ATM_SD(sock);
+ 	void __user *argp = (void __user *)arg;
++	atm_backend_t b;
+ 
+ 	int err;
+-	switch(cmd) {
++	switch (cmd) {
+ 	case ATM_SETBACKEND:
+-	case ATM_NEWBACKENDIF: {
+-		atm_backend_t b;
++	case ATM_NEWBACKENDIF:
+ 		err = get_user(b, (atm_backend_t __user *) argp);
+ 		if (err)
+ 			return -EFAULT;
+@@ -549,7 +642,6 @@
+ 			return br2684_regvcc(atmvcc, argp);
+ 		else
+ 			return br2684_create(argp);
+-		}
+ #ifdef CONFIG_ATM_BR2684_IPFILTER
+ 	case BR2684_SETFILT:
+ 		if (atmvcc->push != br2684_push)
+@@ -557,6 +649,7 @@
+ 		if (!capable(CAP_NET_ADMIN))
+ 			return -EPERM;
+ 		err = br2684_setfilt(atmvcc, argp);
++
+ 		return err;
+ #endif /* CONFIG_ATM_BR2684_IPFILTER */
+ 	}
+@@ -564,24 +657,25 @@
+ }
+ 
+ static struct atm_ioctl br2684_ioctl_ops = {
+-	.owner	= THIS_MODULE,
+-	.ioctl	= br2684_ioctl,
++	.owner = THIS_MODULE,
++	.ioctl = br2684_ioctl,
+ };
+ 
+-
+ #ifdef CONFIG_PROC_FS
+-static void *br2684_seq_start(struct seq_file *seq, loff_t *pos)
++static void *br2684_seq_start(struct seq_file *seq, loff_t * pos)
++	__acquires(devs_lock)
+ {
+ 	read_lock(&devs_lock);
+ 	return seq_list_start(&br2684_devs, *pos);
+ }
+ 
+-static void *br2684_seq_next(struct seq_file *seq, void *v, loff_t *pos)
++static void *br2684_seq_next(struct seq_file *seq, void *v, loff_t * pos)
+ {
+ 	return seq_list_next(v, &br2684_devs, pos);
+ }
+ 
+ static void br2684_seq_stop(struct seq_file *seq, void *v)
++	__releases(devs_lock)
+ {
+ 	read_unlock(&devs_lock);
+ }
+@@ -589,7 +683,7 @@
+ static int br2684_seq_show(struct seq_file *seq, void *v)
+ {
+ 	const struct br2684_dev *brdev = list_entry(v, struct br2684_dev,
+-			br2684_devs);
++						    br2684_devs);
+ 	const struct net_device *net_dev = brdev->net_dev;
+ 	const struct br2684_vcc *brvcc;
+ 	DECLARE_MAC_BUF(mac);
+@@ -601,21 +695,19 @@
+ 		   brdev->mac_was_set ? "set" : "auto");
+ 
+ 	list_for_each_entry(brvcc, &brdev->brvccs, brvccs) {
+-		seq_printf(seq, "  vcc %d.%d.%d: encaps=%s"
+-				    ", failed copies %u/%u"
+-				    "\n", brvcc->atmvcc->dev->number,
+-				    brvcc->atmvcc->vpi, brvcc->atmvcc->vci,
+-				    (brvcc->encaps == e_llc) ? "LLC" : "VC"
+-				    , brvcc->copies_failed
+-				    , brvcc->copies_needed
+-				    );
++		seq_printf(seq, "  vcc %d.%d.%d: encaps=%s payload=%s"
++			   ", failed copies %u/%u"
++			   "\n", brvcc->atmvcc->dev->number,
++			   brvcc->atmvcc->vpi, brvcc->atmvcc->vci,
++			   (brvcc->encaps == e_llc) ? "LLC" : "VC",
++			   (brdev->payload == p_bridged) ? "bridged" : "routed",
++			   brvcc->copies_failed, brvcc->copies_needed);
+ #ifdef CONFIG_ATM_BR2684_IPFILTER
+ #define b1(var, byte)	((u8 *) &brvcc->filter.var)[byte]
+ #define bs(var)		b1(var, 0), b1(var, 1), b1(var, 2), b1(var, 3)
+-			if (brvcc->filter.netmask != 0)
+-				seq_printf(seq, "    filter=%d.%d.%d.%d/"
+-						"%d.%d.%d.%d\n",
+-						bs(prefix), bs(netmask));
++		if (brvcc->filter.netmask != 0)
++			seq_printf(seq, "    filter=%d.%d.%d.%d/"
++				   "%d.%d.%d.%d\n", bs(prefix), bs(netmask));
+ #undef bs
+ #undef b1
+ #endif /* CONFIG_ATM_BR2684_IPFILTER */
+@@ -625,9 +717,9 @@
+ 
+ static const struct seq_operations br2684_seq_ops = {
+ 	.start = br2684_seq_start,
+-	.next  = br2684_seq_next,
+-	.stop  = br2684_seq_stop,
+-	.show  = br2684_seq_show,
++	.next = br2684_seq_next,
++	.stop = br2684_seq_stop,
++	.show = br2684_seq_show,
+ };
+ 
+ static int br2684_proc_open(struct inode *inode, struct file *file)
+@@ -636,26 +728,28 @@
+ }
+ 
+ static const struct file_operations br2684_proc_ops = {
+-	.owner   = THIS_MODULE,
+-	.open    = br2684_proc_open,
+-	.read    = seq_read,
+-	.llseek  = seq_lseek,
++	.owner = THIS_MODULE,
++	.open = br2684_proc_open,
++	.read = seq_read,
++	.llseek = seq_lseek,
+ 	.release = seq_release,
+ };
+ 
+ extern struct proc_dir_entry *atm_proc_root;	/* from proc.c */
+-#endif
++#endif /* CONFIG_PROC_FS */
+ 
+ static int __init br2684_init(void)
+ {
+ #ifdef CONFIG_PROC_FS
+ 	struct proc_dir_entry *p;
++
+ 	if ((p = create_proc_entry("br2684", 0, atm_proc_root)) == NULL)
+-		return -ENOMEM;
+-	p->proc_fops = &br2684_proc_ops;
++        return -ENOMEM;
++        p->proc_fops = &br2684_proc_ops;
+ #endif
+-	register_atm_ioctl(&br2684_ioctl_ops);
+-	return 0;
++        register_atm_ioctl(&br2684_ioctl_ops);
++        return 0;
++                                        
+ }
+ 
+ static void __exit br2684_exit(void)
+@@ -689,3 +783,4 @@
+ MODULE_AUTHOR("Marcell GAL");
+ MODULE_DESCRIPTION("RFC2684 bridged protocols over ATM/AAL5");
+ MODULE_LICENSE("GPL");
++