* Eric Kinzie, 2006-2007, US Naval Research Laboratory
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
+
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/etherdevice.h>
#include <linux/rtnetlink.h>
#include <linux/ip.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
+#include <linux/slab.h>
#include <net/arp.h>
#include <linux/atm.h>
#include <linux/atmdev.h>
#include "common.h"
-#ifdef SKB_DEBUG
static void skb_debug(const struct sk_buff *skb)
{
+#ifdef SKB_DEBUG
#define NUM2PRINT 50
- char buf[NUM2PRINT * 3 + 1]; /* 3 chars per byte */
- int i = 0;
- for (i = 0; i < skb->len && i < NUM2PRINT; i++) {
- sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
- }
- printk(KERN_DEBUG "br2684: skb: %s\n", buf);
-}
-#else
-#define skb_debug(skb) do {} while (0)
+ print_hex_dump(KERN_DEBUG, "br2684: skb: ", DUMP_OFFSET,
+ 16, 1, skb->data, min(NUM2PRINT, skb->len), true);
#endif
+}
#define BR2684_ETHERTYPE_LEN 2
#define BR2684_PAD_LEN 2
#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[] =
+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 unsigned char llc_oui_ipv4[] = { LLC, SNAP_ROUTED, ETHERTYPE_IPV4 };
-static unsigned char llc_oui_ipv6[] = { LLC, SNAP_ROUTED, ETHERTYPE_IPV6 };
+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,
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); */
+ 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 list_head br2684_devs;
int number;
struct list_head brvccs; /* one device <=> one vcc (before xmas) */
- struct net_device_stats stats;
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)
return NULL;
}
+/* chained vcc->pop function. Check if we should wake the netif_queue */
+static void br2684_pop(struct atm_vcc *vcc, struct sk_buff *skb)
+{
+ struct br2684_vcc *brvcc = BR2684_VCC(vcc);
+ struct net_device *net_dev = skb->dev;
+
+ pr_debug("(vcc %p ; net_dev %p )\n", vcc, net_dev);
+ brvcc->old_pop(vcc, skb);
+
+ if (!net_dev)
+ return;
+
+ if (atm_may_send(vcc, 0))
+ netif_wake_queue(net_dev);
+
+}
/*
* 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,
* 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 net_device *dev,
struct br2684_vcc *brvcc)
{
+ struct br2684_dev *brdev = BRPRIV(dev);
struct atm_vcc *atmvcc;
int minheadroom = (brvcc->encaps == e_llc) ? 10 : 2;
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 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);
+
+ if (!atm_may_send(atmvcc, 0)) {
+ netif_stop_queue(brvcc->device);
+ /*check for race with br2684_pop*/
+ if (atm_may_send(atmvcc, 0))
+ netif_start_queue(brvcc->device);
+ }
+
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 */
}
-static int br2684_start_xmit(struct sk_buff *skb, struct net_device *dev)
+static netdev_tx_t br2684_start_xmit(struct sk_buff *skb,
+ struct net_device *dev)
{
struct br2684_dev *brdev = BRPRIV(dev);
struct br2684_vcc *brvcc;
- pr_debug("br2684_start_xmit, skb->dst=%p\n", skb->dst);
+ pr_debug("skb_dst(skb)=%p\n", skb_dst(skb));
read_lock(&devs_lock);
brvcc = pick_outgoing_vcc(skb, brdev);
if (brvcc == NULL) {
pr_debug("no vcc attached to dev %s\n", dev->name);
- brdev->stats.tx_errors++;
- brdev->stats.tx_carrier_errors++;
+ dev->stats.tx_errors++;
+ dev->stats.tx_carrier_errors++;
/* netif_stop_queue(dev); */
dev_kfree_skb(skb);
read_unlock(&devs_lock);
- return 0;
+ return NETDEV_TX_OK;
}
- 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
*
* Don't free here! this pointer might be no longer valid!
*/
- 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)
-{
- pr_debug("br2684_get_stats\n");
- return &BRPRIV(dev)->stats;
+ return NETDEV_TX_OK;
}
/*
* 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;
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);
struct net_device *net_dev = brvcc->device;
struct br2684_dev *brdev = BRPRIV(net_dev);
- pr_debug("br2684_push\n");
+ pr_debug("\n");
if (unlikely(skb == NULL)) {
/* skb==NULL means VCC is being destroyed */
__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);
+ 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).
- */
+ /*
+ * 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_reset_network_header(skb);
iph = ip_hdr(skb);
if (iph->version == 4)
- skb->protocol = __constant_htons(ETH_P_IP);
+ skb->protocol = htons(ETH_P_IP);
else if (iph->version == 6)
- skb->protocol = __constant_htons(ETH_P_IPV6);
+ skb->protocol = htons(ETH_P_IPV6);
else
goto error;
skb->pkt_type = PACKET_HOST;
/* sigh, interface is down? */
if (unlikely(!(net_dev->flags & IFF_UP)))
goto dropped;
- brdev->stats.rx_packets++;
- brdev->stats.rx_bytes += skb->len;
+ 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:
- brdev->stats.rx_dropped++;
+ net_dev->stats.rx_dropped++;
goto free_skb;
error:
- brdev->stats.rx_errors++;
+ net_dev->stats.rx_errors++;
free_skb:
dev_kfree_skb(skb);
- return;
}
/*
*/
static int br2684_regvcc(struct atm_vcc *atmvcc, void __user * arg)
{
+ struct sk_buff_head queue;
int err;
struct br2684_vcc *brvcc;
- struct sk_buff *skb;
+ struct sk_buff *skb, *tmp;
struct sk_buff_head *rq;
struct br2684_dev *brdev;
struct net_device *net_dev;
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");
+ pr_err("tried to attach to non-existant device\n");
err = -ENXIO;
goto error;
}
err = -EEXIST;
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) {
+ 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) {
err = -EINVAL;
goto error;
}
- pr_debug("br2684_regvcc vcc=%p, encaps=%d, brvcc=%p\n", atmvcc,
- be.encaps, brvcc);
+ pr_debug("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])
atmvcc->user_back = brvcc;
brvcc->encaps = (enum br2684_encaps)be.encaps;
brvcc->old_push = atmvcc->push;
+ brvcc->old_pop = atmvcc->pop;
barrier();
atmvcc->push = br2684_push;
+ atmvcc->pop = br2684_pop;
+ __skb_queue_head_init(&queue);
rq = &sk_atm(atmvcc)->sk_receive_queue;
spin_lock_irqsave(&rq->lock, flags);
- if (skb_queue_empty(rq)) {
- skb = NULL;
- } else {
- /* NULL terminate the list. */
- rq->prev->next = NULL;
- skb = rq->next;
- }
- rq->prev = rq->next = (struct sk_buff *)rq;
- rq->qlen = 0;
+ skb_queue_splice_init(rq, &queue);
spin_unlock_irqrestore(&rq->lock, flags);
- while (skb) {
- struct sk_buff *next = skb->next;
+ skb_queue_walk_safe(&queue, skb, tmp) {
+ struct net_device *dev = skb->dev;
- skb->next = skb->prev = NULL;
- br2684_push(atmvcc, skb);
- BRPRIV(skb->dev)->stats.rx_bytes -= skb->len;
- BRPRIV(skb->dev)->stats.rx_packets--;
+ dev->stats.rx_bytes -= skb->len;
+ dev->stats.rx_packets--;
- skb = next;
+ 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 const struct net_device_ops br2684_netdev_ops_routed = {
+ .ndo_start_xmit = br2684_start_xmit,
+ .ndo_set_mac_address = br2684_mac_addr,
+ .ndo_change_mtu = eth_change_mtu
+};
+
static void br2684_setup(struct net_device *netdev)
{
struct br2684_dev *brdev = BRPRIV(netdev);
ether_setup(netdev);
brdev->net_dev = netdev;
- 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 void br2684_setup_routed(struct net_device *netdev)
{
struct br2684_dev *brdev = BRPRIV(netdev);
- brdev->net_dev = 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->netdev_ops = &br2684_netdev_ops_routed;
netdev->addr_len = 0;
netdev->mtu = 1500;
netdev->type = ARPHRD_PPP;
INIT_LIST_HEAD(&brdev->brvccs);
}
-static int br2684_create(void __user * arg)
+static int br2684_create(void __user *arg)
{
int err;
struct net_device *netdev;
struct atm_newif_br2684 ni;
enum br2684_payload payload;
- pr_debug("br2684_create\n");
+ pr_debug("\n");
- if (copy_from_user(&ni, arg, sizeof ni)) {
+ if (copy_from_user(&ni, arg, sizeof ni))
return -EFAULT;
- }
if (ni.media & BR2684_FLAG_ROUTED)
payload = p_routed;
payload = p_bridged;
ni.media &= 0xffff; /* strip flags */
- if (ni.media != BR2684_MEDIA_ETHERNET || ni.mtu != 1500) {
+ 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",
/* open, stop, do_ioctl ? */
err = register_netdev(netdev);
if (err < 0) {
- printk(KERN_ERR "br2684_create: register_netdev failed\n");
+ pr_err("register_netdev failed\n");
free_netdev(netdev);
return err;
}
br2684_devs);
const struct net_device *net_dev = brdev->net_dev;
const struct br2684_vcc *brvcc;
- DECLARE_MAC_BUF(mac);
- seq_printf(seq, "dev %.16s: num=%d, mac=%s (%s)\n",
+ seq_printf(seq, "dev %.16s: num=%d, mac=%pM (%s)\n",
net_dev->name,
brdev->number,
- print_mac(mac, net_dev->dev_addr),
+ net_dev->dev_addr,
brdev->mac_was_set ? "set" : "auto");
list_for_each_entry(brvcc, &brdev->brvccs, brvccs) {
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff