/*
-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/config.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <net/arp.h>
#include <linux/atm.h>
#include <linux/atmdev.h>
+#include <linux/capability.h>
#include <linux/seq_file.h>
#include <linux/atmbr2684.h>
#include "common.h"
-#include "ipcommon.h"
-
-/*
- * 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
- * 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
- * we need to do to get this perfect. For now we just will copy the packet
- * if we need space for the header
- */
-/* #define FASTER_VERSION */
-
-#ifdef DEBUG
-#define DPRINTK(format, args...) printk(KERN_DEBUG "br2684: " format, ##args)
-#else
-#define DPRINTK(format, args...)
-#endif
#ifdef SKB_DEBUG
static void skb_debug(const struct sk_buff *skb)
#define skb_debug(skb) do {} while (0)
#endif
-static unsigned char llc_oui_pid_pad[] =
- { 0xAA, 0xAA, 0x03, 0x00, 0x80, 0xC2, 0x00, 0x07, 0x00, 0x00 };
-#define PADLEN (2)
+#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 const unsigned char ethertype_ipv4[] = { ETHERTYPE_IPV4 };
+static const unsigned char ethertype_ipv6[] = { ETHERTYPE_IPV6 };
+static const unsigned char llc_oui_pid_pad[] =
+ { LLC, SNAP_BRIDGED, PID_ETHERNET, PAD_BRIDGED };
+static const unsigned char llc_oui_ipv4[] = { LLC, SNAP_ROUTED, ETHERTYPE_IPV4 };
+static const 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
struct br2684_filter filter;
#endif /* CONFIG_ATM_BR2684_IPFILTER */
-#ifndef FASTER_VERSION
unsigned copies_needed, copies_failed;
-#endif /* FASTER_VERSION */
};
struct br2684_dev {
struct net_device *net_dev;
struct list_head br2684_devs;
int number;
- struct list_head brvccs; /* one device <=> one vcc (before xmas) */
- struct net_device_stats stats;
+ struct list_head brvccs; /* one device <=> one vcc (before xmas) */
int mac_was_set;
+ enum br2684_payload payload;
};
/*
static inline struct br2684_dev *BRPRIV(const struct net_device *net_dev)
{
- return (struct br2684_dev *) net_dev->priv;
+ return (struct br2684_dev *)netdev_priv(net_dev);
}
static inline struct net_device *list_entry_brdev(const struct list_head *le)
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)
* the way for multiple vcc's per itf. Returns true if we can send,
* otherwise false
*/
-static int br2684_xmit_vcc(struct sk_buff *skb, struct br2684_dev *brdev,
- struct br2684_vcc *brvcc)
+static int br2684_xmit_vcc(struct sk_buff *skb, struct net_device *dev,
+ struct br2684_vcc *brvcc)
{
+ struct br2684_dev *brdev = BRPRIV(dev);
struct atm_vcc *atmvcc;
-#ifdef FASTER_VERSION
- if (brvcc->encaps == e_llc)
- memcpy(skb_push(skb, 8), llc_oui_pid_pad, 8);
- /* last 2 bytes of llc_oui_pid_pad are managed by header routines;
- yes, you got it: 8 + 2 = sizeof(llc_oui_pid_pad)
- */
-#else
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++;
}
skb = skb2;
}
- skb_push(skb, minheadroom);
- if (brvcc->encaps == e_llc)
- memcpy(skb->data, llc_oui_pid_pad, 10);
- else
- memset(skb->data, 0, 2);
-#endif /* FASTER_VERSION */
+
+ 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 { /* e_vc */
+ if (brdev->payload == p_bridged) {
+ skb_push(skb, 2);
+ memset(skb->data, 0, 2);
+ } else { /* p_routed */
+ skb_pull(skb, ETH_HLEN);
+ }
+ }
skb_debug(skb);
ATM_SKB(skb)->vcc = atmvcc = brvcc->atmvcc;
- DPRINTK("atm_skb(%p)->vcc(%p)->dev(%p)\n", skb, atmvcc, atmvcc->dev);
+ 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++;
- brdev->stats.tx_bytes += skb->len;
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += skb->len;
atmvcc->send(atmvcc, skb);
return 1;
}
-static inline struct br2684_vcc *pick_outgoing_vcc(struct sk_buff *skb,
- struct br2684_dev *brdev)
+static inline struct br2684_vcc *pick_outgoing_vcc(const struct sk_buff *skb,
+ const 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)
struct br2684_dev *brdev = BRPRIV(dev);
struct br2684_vcc *brvcc;
- DPRINTK("br2684_start_xmit, skb->dst=%p\n", skb->dst);
+ pr_debug("br2684_start_xmit, skb_dst(skb)=%p\n", skb_dst(skb));
read_lock(&devs_lock);
brvcc = pick_outgoing_vcc(skb, brdev);
if (brvcc == NULL) {
- DPRINTK("no vcc attached to dev %s\n", dev->name);
- brdev->stats.tx_errors++;
- brdev->stats.tx_carrier_errors++;
+ pr_debug("no vcc attached to dev %s\n", dev->name);
+ dev->stats.tx_errors++;
+ dev->stats.tx_carrier_errors++;
/* netif_stop_queue(dev); */
dev_kfree_skb(skb);
read_unlock(&devs_lock);
return 0;
}
- if (!br2684_xmit_vcc(skb, brdev, brvcc)) {
+ if (!br2684_xmit_vcc(skb, dev, brvcc)) {
/*
* 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++;
+ dev->stats.tx_errors++;
+ dev->stats.tx_fifo_errors++;
}
read_unlock(&devs_lock);
return 0;
}
-static struct net_device_stats *br2684_get_stats(struct net_device *dev)
-{
- DPRINTK("br2684_get_stats\n");
- return &BRPRIV(dev)->stats;
-}
-
-#ifdef FASTER_VERSION
-/*
- * These mirror eth_header and eth_header_cache. They are not usually
- * exported for use in modules, so we grab them from net_device
- * after ether_setup() is done with it. Bit of a hack.
- */
-static int (*my_eth_header)(struct sk_buff *, struct net_device *,
- unsigned short, void *, void *, unsigned);
-static int (*my_eth_header_cache)(struct neighbour *, struct hh_cache *);
-
-static int
-br2684_header(struct sk_buff *skb, struct net_device *dev,
- unsigned short type, void *daddr, void *saddr, unsigned len)
-{
- u16 *pad_before_eth;
- int t = my_eth_header(skb, dev, type, daddr, saddr, len);
- if (t > 0) {
- pad_before_eth = (u16 *) skb_push(skb, 2);
- *pad_before_eth = 0;
- return dev->hard_header_len; /* or return 16; ? */
- } else
- return t;
-}
-
-static int
-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
-xmit will add the additional header part in that case */
- u16 *pad_before_eth = (u16 *)(hh->hh_data);
- int t = my_eth_header_cache(neigh, hh);
- DPRINTK("br2684_header_cache, neigh=%p, hh_cache=%p\n", neigh, hh);
- if (t < 0)
- return t;
- else {
- *pad_before_eth = 0;
- hh->hh_len = PADLEN + ETH_HLEN;
- }
- return 0;
-}
-
-/*
- * This is similar to eth_type_trans, which cannot be used because of
- * our dev->hard_header_len
- */
-static inline __be16 br_type_trans(struct sk_buff *skb, struct net_device *dev)
-{
- struct ethhdr *eth;
- unsigned char *rawp;
- eth = eth_hdr(skb);
-
- if (is_multicast_ether_addr(eth->h_dest)) {
- if (memcmp(eth->h_dest, dev->broadcast, ETH_ALEN) == 0)
- skb->pkt_type = PACKET_BROADCAST;
- else
- skb->pkt_type = PACKET_MULTICAST;
- }
-
- else if (memcmp(eth->h_dest, dev->dev_addr, ETH_ALEN))
- skb->pkt_type = PACKET_OTHERHOST;
-
- if (ntohs(eth->h_proto) >= 1536)
- return eth->h_proto;
-
- rawp = skb->data;
-
- /*
- * 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
- * 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.
- */
- if (*(unsigned short *) rawp == 0xFFFF)
- return htons(ETH_P_802_3);
-
- /*
- * Real 802.2 LLC
- */
- return htons(ETH_P_802_2);
-}
-#endif /* FASTER_VERSION */
-
/*
* 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 br2684_mac_addr(struct net_device *dev, void *p)
{
- int err = my_eth_mac_addr(dev, p);
+ int err = eth_mac_addr(dev, p);
if (!err)
BRPRIV(dev)->mac_was_set = 1;
return err;
#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;
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);
/* Returns 1 if packet should be dropped */
static inline int
-packet_fails_filter(u16 type, struct br2684_vcc *brvcc, struct sk_buff *skb)
+packet_fails_filter(__be16 type, struct br2684_vcc *brvcc, struct sk_buff *skb)
{
if (brvcc->filter.netmask == 0)
- return 0; /* no filter in place */
- if (type == __constant_htons(ETH_P_IP) &&
- (((struct iphdr *) (skb->data))->daddr & brvcc->filter.
+ return 0; /* no filter in place */
+ if (type == htons(ETH_P_IP) &&
+ (((struct iphdr *)(skb->data))->daddr & brvcc->filter.
netmask) == brvcc->filter.prefix)
return 0;
- if (type == __constant_htons(ETH_P_ARP))
+ 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 */
}
static void br2684_close_vcc(struct br2684_vcc *brvcc)
{
- DPRINTK("removing VCC %p from dev %p\n", brvcc, brvcc->device);
+ pr_debug("removing VCC %p from dev %p\n", brvcc, brvcc->device);
write_lock_irq(&devs_lock);
list_del(&brvcc->brvccs);
write_unlock_irq(&devs_lock);
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;
- DPRINTK("br2684_push\n");
+ pr_debug("br2684_push\n");
if (unlikely(skb == NULL)) {
/* skb==NULL means VCC is being destroyed */
br2684_close_vcc(brvcc);
if (list_empty(&brdev->brvccs)) {
- read_lock(&devs_lock);
+ write_lock_irq(&devs_lock);
list_del(&brdev->br2684_devs);
- read_unlock(&devs_lock);
+ write_unlock_irq(&devs_lock);
unregister_netdev(net_dev);
free_netdev(net_dev);
}
skb_debug(skb);
atm_return(atmvcc, skb->truesize);
- DPRINTK("skb from brdev %p\n", brdev);
+ 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)) {
- 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;
+
+ /* 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 = htons(ETH_P_IPV6);
+ else if (memcmp
+ (skb->data + 6, ethertype_ipv4,
+ sizeof(ethertype_ipv4)) == 0)
+ skb->protocol = htons(ETH_P_IP);
+ else
+ goto error;
+ 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
+ goto error;
+
+ } else { /* e_vc */
+ if (brdev->payload == p_routed) {
+ struct iphdr *iph;
+
+ skb_reset_network_header(skb);
+ iph = ip_hdr(skb);
+ if (iph->version == 4)
+ skb->protocol = htons(ETH_P_IP);
+ else if (iph->version == 6)
+ skb->protocol = htons(ETH_P_IPV6);
+ else
+ goto error;
+ skb->pkt_type = PACKET_HOST;
+ } else { /* p_bridged */
+ /* first 2 chars should be 0 */
+ if (*((u16 *) (skb->data)) != 0)
+ goto error;
+ skb_pull(skb, BR2684_PAD_LEN);
+ skb->protocol = eth_type_trans(skb, net_dev);
}
}
- if (skb->len < plen) {
- brdev->stats.rx_errors++;
- dev_kfree_skb(skb); /* dev_ not needed? */
- return;
- }
-#ifdef FASTER_VERSION
- /* FIXME: tcpdump shows that pointer to mac header is 2 bytes earlier,
- than should be. What else should I set? */
- skb_pull(skb, plen);
- skb->mac.raw = ((char *) (skb->data)) - ETH_HLEN;
- skb->pkt_type = PACKET_HOST;
-#ifdef CONFIG_BR2684_FAST_TRANS
- skb->protocol = ((u16 *) skb->data)[-1];
-#else /* some protocols might require this: */
- skb->protocol = br_type_trans(skb, net_dev);
-#endif /* CONFIG_BR2684_FAST_TRANS */
-#else
- skb_pull(skb, plen - ETH_HLEN);
- skb->protocol = eth_type_trans(skb, net_dev);
-#endif /* FASTER_VERSION */
#ifdef CONFIG_ATM_BR2684_IPFILTER
- if (unlikely(packet_fails_filter(skb->protocol, brvcc, skb))) {
- brdev->stats.rx_dropped++;
- dev_kfree_skb(skb);
- return;
- }
+ if (unlikely(packet_fails_filter(skb->protocol, brvcc, skb)))
+ goto dropped;
#endif /* CONFIG_ATM_BR2684_IPFILTER */
skb->dev = net_dev;
ATM_SKB(skb)->vcc = atmvcc; /* needed ? */
- DPRINTK("received packet's protocol: %x\n", ntohs(skb->protocol));
+ pr_debug("received packet's protocol: %x\n", ntohs(skb->protocol));
skb_debug(skb);
- if (unlikely(!(net_dev->flags & IFF_UP))) {
- /* sigh, interface is down */
- brdev->stats.rx_dropped++;
- dev_kfree_skb(skb);
- return;
- }
- brdev->stats.rx_packets++;
- brdev->stats.rx_bytes += skb->len;
+ /* sigh, interface is down? */
+ if (unlikely(!(net_dev->flags & IFF_UP)))
+ goto dropped;
+ net_dev->stats.rx_packets++;
+ net_dev->stats.rx_bytes += skb->len;
memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
netif_rx(skb);
+ return;
+
+dropped:
+ net_dev->stats.rx_dropped++;
+ goto free_skb;
+error:
+ net_dev->stats.rx_errors++;
+free_skb:
+ dev_kfree_skb(skb);
+ return;
}
-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()
-*/
+ struct sk_buff_head queue;
int err;
struct br2684_vcc *brvcc;
- struct sk_buff_head copy;
- struct sk_buff *skb;
+ struct sk_buff *skb, *tmp;
+ struct sk_buff_head *rq;
struct br2684_dev *brdev;
struct net_device *net_dev;
struct atm_backend_br2684 be;
+ unsigned long flags;
if (copy_from_user(&be, arg, sizeof be))
return -EFAULT;
- brvcc = kmalloc(sizeof(struct br2684_vcc), GFP_KERNEL);
+ brvcc = kzalloc(sizeof(struct br2684_vcc), GFP_KERNEL);
if (!brvcc)
return -ENOMEM;
- memset(brvcc, 0, sizeof(struct br2684_vcc));
write_lock_irq(&devs_lock);
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;
}
}
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;
}
- DPRINTK("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])
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;
- skb_queue_head_init(©);
- skb_migrate(&sk_atm(atmvcc)->sk_receive_queue, ©);
- while ((skb = skb_dequeue(©)) != NULL) {
- BRPRIV(skb->dev)->stats.rx_bytes -= skb->len;
- BRPRIV(skb->dev)->stats.rx_packets--;
+
+ __skb_queue_head_init(&queue);
+ rq = &sk_atm(atmvcc)->sk_receive_queue;
+
+ spin_lock_irqsave(&rq->lock, flags);
+ skb_queue_splice_init(rq, &queue);
+ spin_unlock_irqrestore(&rq->lock, flags);
+
+ skb_queue_walk_safe(&queue, skb, tmp) {
+ struct net_device *dev = skb->dev;
+
+ dev->stats.rx_bytes -= skb->len;
+ dev->stats.rx_packets--;
+
br2684_push(atmvcc, skb);
}
__module_get(THIS_MODULE);
return 0;
- error:
+ error:
write_unlock_irq(&devs_lock);
kfree(brvcc);
return err;
}
+static const struct net_device_ops br2684_netdev_ops = {
+ .ndo_start_xmit = br2684_start_xmit,
+ .ndo_set_mac_address = br2684_mac_addr,
+ .ndo_change_mtu = eth_change_mtu,
+ .ndo_validate_addr = eth_validate_addr,
+};
+
static void br2684_setup(struct net_device *netdev)
{
struct br2684_dev *brdev = BRPRIV(netdev);
ether_setup(netdev);
brdev->net_dev = netdev;
-#ifdef FASTER_VERSION
- my_eth_header = netdev->hard_header;
- netdev->hard_header = br2684_header;
- my_eth_header_cache = netdev->hard_header_cache;
- netdev->hard_header_cache = br2684_header_cache;
- netdev->hard_header_len = sizeof(llc_oui_pid_pad) + ETH_HLEN; /* 10 + 14 */
-#endif
- 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->netdev_ops = &br2684_netdev_ops;
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;
+
+ netdev->netdev_ops = &br2684_netdev_ops;
+ 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;
- DPRINTK("br2684_create\n");
+ 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;
brdev = BRPRIV(netdev);
- DPRINTK("registered netdev %s\n", netdev->name);
+ pr_debug("registered netdev %s\n", netdev->name);
/* open, stop, do_ioctl ? */
err = register_netdev(netdev);
if (err < 0) {
}
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);
* -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;
return br2684_regvcc(atmvcc, argp);
else
return br2684_create(argp);
- }
#ifdef CONFIG_ATM_BR2684_IPFILTER
case BR2684_SETFILT:
if (atmvcc->push != br2684_push)
if (!capable(CAP_NET_ADMIN))
return -EPERM;
err = br2684_setfilt(atmvcc, argp);
+
return err;
#endif /* CONFIG_ATM_BR2684_IPFILTER */
}
}
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)
{
- loff_t offs = 0;
- struct br2684_dev *brd;
-
read_lock(&devs_lock);
-
- list_for_each_entry(brd, &br2684_devs, br2684_devs) {
- if (offs == *pos)
- return brd;
- ++offs;
- }
- return NULL;
+ 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)
{
- struct br2684_dev *brd = v;
-
- ++*pos;
-
- brd = list_entry(brd->br2684_devs.next,
- struct br2684_dev, br2684_devs);
- return (&brd->br2684_devs != &br2684_devs) ? brd : NULL;
+ 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);
}
static int br2684_seq_show(struct seq_file *seq, void *v)
{
- const struct br2684_dev *brdev = v;
+ const struct br2684_dev *brdev = list_entry(v, struct br2684_dev,
+ br2684_devs);
const struct net_device *net_dev = brdev->net_dev;
const struct br2684_vcc *brvcc;
- seq_printf(seq, "dev %.16s: num=%d, mac=%02X:%02X:"
- "%02X:%02X:%02X:%02X (%s)\n", net_dev->name,
- brdev->number,
- net_dev->dev_addr[0],
- net_dev->dev_addr[1],
- net_dev->dev_addr[2],
- net_dev->dev_addr[3],
- net_dev->dev_addr[4],
- net_dev->dev_addr[5],
- brdev->mac_was_set ? "set" : "auto");
+ seq_printf(seq, "dev %.16s: num=%d, mac=%pM (%s)\n",
+ net_dev->name,
+ brdev->number,
+ net_dev->dev_addr,
+ brdev->mac_was_set ? "set" : "auto");
list_for_each_entry(brvcc, &brdev->brvccs, brvccs) {
- seq_printf(seq, " vcc %d.%d.%d: encaps=%s"
-#ifndef FASTER_VERSION
- ", failed copies %u/%u"
-#endif /* FASTER_VERSION */
- "\n", brvcc->atmvcc->dev->number,
- brvcc->atmvcc->vpi, brvcc->atmvcc->vci,
- (brvcc->encaps == e_llc) ? "LLC" : "VC"
-#ifndef FASTER_VERSION
- , brvcc->copies_failed
- , brvcc->copies_needed
-#endif /* FASTER_VERSION */
- );
+ 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 */
return 0;
}
-static struct seq_operations br2684_seq_ops = {
+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)
return seq_open(file, &br2684_seq_ops);
}
-static struct file_operations br2684_proc_ops = {
- .owner = THIS_MODULE,
- .open = br2684_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
+static const struct file_operations br2684_proc_ops = {
+ .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)
+ p = proc_create("br2684", 0, atm_proc_root, &br2684_proc_ops);
+ if (p == NULL)
return -ENOMEM;
- p->proc_fops = &br2684_proc_ops;
#endif
register_atm_ioctl(&br2684_ioctl_ops);
return 0;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff