-/* drivers/net/ifb.c:
+/* drivers/net/ifb.c:
The purpose of this driver is to provide a device that allows
for sharing of resources:
an impression of sharing.
2) Allows for queueing incoming traffic for shaping instead of
- dropping.
-
+ dropping.
+
The original concept is based on what is known as the IMQ
driver initially written by Martin Devera, later rewritten
by Patrick McHardy and then maintained by Andre Correa.
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version
2 of the License, or (at your option) any later version.
-
+
Authors: Jamal Hadi Salim (2005)
-
+
*/
-#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/init.h>
#include <linux/moduleparam.h>
-#include <net/pkt_sched.h>
+#include <net/pkt_sched.h>
+#include <net/net_namespace.h>
#define TX_TIMEOUT (2*HZ)
-
+
#define TX_Q_LIMIT 32
struct ifb_private {
- struct net_device_stats stats;
struct tasklet_struct ifb_tasklet;
int tasklet_pending;
/* mostly debug stats leave in for now */
static int numifbs = 2;
static void ri_tasklet(unsigned long dev);
-static int ifb_xmit(struct sk_buff *skb, struct net_device *dev);
-static struct net_device_stats *ifb_get_stats(struct net_device *dev);
+static netdev_tx_t ifb_xmit(struct sk_buff *skb, struct net_device *dev);
static int ifb_open(struct net_device *dev);
static int ifb_close(struct net_device *dev);
-static void ri_tasklet(unsigned long dev)
+static void ri_tasklet(unsigned long dev)
{
struct net_device *_dev = (struct net_device *)dev;
struct ifb_private *dp = netdev_priv(_dev);
- struct net_device_stats *stats = &dp->stats;
+ struct net_device_stats *stats = &_dev->stats;
+ struct netdev_queue *txq;
struct sk_buff *skb;
+ txq = netdev_get_tx_queue(_dev, 0);
dp->st_task_enter++;
if ((skb = skb_peek(&dp->tq)) == NULL) {
dp->st_txq_refl_try++;
- if (netif_tx_trylock(_dev)) {
+ if (__netif_tx_trylock(txq)) {
dp->st_rxq_enter++;
while ((skb = skb_dequeue(&dp->rq)) != NULL) {
skb_queue_tail(&dp->tq, skb);
dp->st_rx2tx_tran++;
}
- netif_tx_unlock(_dev);
+ __netif_tx_unlock(txq);
} else {
/* reschedule */
dp->st_rxq_notenter++;
skb->tc_verd = SET_TC_NCLS(skb->tc_verd);
stats->tx_packets++;
stats->tx_bytes +=skb->len;
+
+ rcu_read_lock();
+ skb->dev = dev_get_by_index_rcu(&init_net, skb->skb_iif);
+ if (!skb->dev) {
+ rcu_read_unlock();
+ dev_kfree_skb(skb);
+ stats->tx_dropped++;
+ break;
+ }
+ rcu_read_unlock();
+ skb->skb_iif = _dev->ifindex;
+
if (from & AT_EGRESS) {
dp->st_rx_frm_egr++;
dev_queue_xmit(skb);
} else if (from & AT_INGRESS) {
-
dp->st_rx_frm_ing++;
+ skb_pull(skb, skb->dev->hard_header_len);
netif_rx(skb);
- } else {
- dev_kfree_skb(skb);
- stats->tx_dropped++;
- }
+ } else
+ BUG();
}
- if (netif_tx_trylock(_dev)) {
+ if (__netif_tx_trylock(txq)) {
dp->st_rxq_check++;
if ((skb = skb_peek(&dp->rq)) == NULL) {
dp->tasklet_pending = 0;
netif_wake_queue(_dev);
} else {
dp->st_rxq_rsch++;
- netif_tx_unlock(_dev);
+ __netif_tx_unlock(txq);
goto resched;
}
- netif_tx_unlock(_dev);
+ __netif_tx_unlock(txq);
} else {
resched:
dp->tasklet_pending = 1;
}
-static void __init ifb_setup(struct net_device *dev)
+static const struct net_device_ops ifb_netdev_ops = {
+ .ndo_open = ifb_open,
+ .ndo_stop = ifb_close,
+ .ndo_start_xmit = ifb_xmit,
+ .ndo_validate_addr = eth_validate_addr,
+};
+
+static void ifb_setup(struct net_device *dev)
{
/* Initialize the device structure. */
- dev->get_stats = ifb_get_stats;
- dev->hard_start_xmit = ifb_xmit;
- dev->open = &ifb_open;
- dev->stop = &ifb_close;
+ dev->destructor = free_netdev;
+ dev->netdev_ops = &ifb_netdev_ops;
/* Fill in device structure with ethernet-generic values. */
ether_setup(dev);
dev->tx_queue_len = TX_Q_LIMIT;
- dev->change_mtu = NULL;
+
dev->flags |= IFF_NOARP;
dev->flags &= ~IFF_MULTICAST;
- SET_MODULE_OWNER(dev);
+ dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
random_ether_addr(dev->dev_addr);
}
-static int ifb_xmit(struct sk_buff *skb, struct net_device *dev)
+static netdev_tx_t ifb_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct ifb_private *dp = netdev_priv(dev);
- struct net_device_stats *stats = &dp->stats;
- int ret = 0;
+ struct net_device_stats *stats = &dev->stats;
u32 from = G_TC_FROM(skb->tc_verd);
- stats->tx_packets++;
- stats->tx_bytes+=skb->len;
+ stats->rx_packets++;
+ stats->rx_bytes+=skb->len;
- if (!from || !skb->input_dev) {
-dropped:
+ if (!(from & (AT_INGRESS|AT_EGRESS)) || !skb->skb_iif) {
dev_kfree_skb(skb);
stats->rx_dropped++;
- return ret;
- } else {
- /*
- * note we could be going
- * ingress -> egress or
- * egress -> ingress
- */
- skb->dev = skb->input_dev;
- skb->input_dev = dev;
- if (from & AT_INGRESS) {
- skb_pull(skb, skb->dev->hard_header_len);
- } else {
- if (!(from & AT_EGRESS)) {
- goto dropped;
- }
- }
+ return NETDEV_TX_OK;
}
if (skb_queue_len(&dp->rq) >= dev->tx_queue_len) {
tasklet_schedule(&dp->ifb_tasklet);
}
- return ret;
-}
-
-static struct net_device_stats *ifb_get_stats(struct net_device *dev)
-{
- struct ifb_private *dp = netdev_priv(dev);
- struct net_device_stats *stats = &dp->stats;
-
- pr_debug("tasklets stats %ld:%ld:%ld:%ld:%ld:%ld:%ld:%ld:%ld \n",
- dp->st_task_enter, dp->st_txq_refl_try, dp->st_rxq_enter,
- dp->st_rx2tx_tran dp->st_rxq_notenter, dp->st_rx_frm_egr,
- dp->st_rx_frm_ing, dp->st_rxq_check, dp->st_rxq_rsch );
-
- return stats;
+ return NETDEV_TX_OK;
}
-static struct net_device **ifbs;
-
-/* Number of ifb devices to be set up by this module. */
-module_param(numifbs, int, 0);
-MODULE_PARM_DESC(numifbs, "Number of ifb devices");
-
static int ifb_close(struct net_device *dev)
{
struct ifb_private *dp = netdev_priv(dev);
return 0;
}
+static int ifb_validate(struct nlattr *tb[], struct nlattr *data[])
+{
+ if (tb[IFLA_ADDRESS]) {
+ if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
+ return -EINVAL;
+ if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
+ return -EADDRNOTAVAIL;
+ }
+ return 0;
+}
+
+static struct rtnl_link_ops ifb_link_ops __read_mostly = {
+ .kind = "ifb",
+ .priv_size = sizeof(struct ifb_private),
+ .setup = ifb_setup,
+ .validate = ifb_validate,
+};
+
+/* Number of ifb devices to be set up by this module. */
+module_param(numifbs, int, 0);
+MODULE_PARM_DESC(numifbs, "Number of ifb devices");
+
static int __init ifb_init_one(int index)
{
struct net_device *dev_ifb;
if (!dev_ifb)
return -ENOMEM;
- if ((err = register_netdev(dev_ifb))) {
- free_netdev(dev_ifb);
- dev_ifb = NULL;
- } else {
- ifbs[index] = dev_ifb;
- }
+ err = dev_alloc_name(dev_ifb, dev_ifb->name);
+ if (err < 0)
+ goto err;
+
+ dev_ifb->rtnl_link_ops = &ifb_link_ops;
+ err = register_netdevice(dev_ifb);
+ if (err < 0)
+ goto err;
+
+ return 0;
+err:
+ free_netdev(dev_ifb);
return err;
}
-static void ifb_free_one(int index)
+static int __init ifb_init_module(void)
{
- unregister_netdev(ifbs[index]);
- free_netdev(ifbs[index]);
-}
+ int i, err;
+
+ rtnl_lock();
+ err = __rtnl_link_register(&ifb_link_ops);
-static int __init ifb_init_module(void)
-{
- int i, err = 0;
- ifbs = kmalloc(numifbs * sizeof(void *), GFP_KERNEL);
- if (!ifbs)
- return -ENOMEM;
for (i = 0; i < numifbs && !err; i++)
- err = ifb_init_one(i);
- if (err) {
- while (--i >= 0)
- ifb_free_one(i);
- }
+ err = ifb_init_one(i);
+ if (err)
+ __rtnl_link_unregister(&ifb_link_ops);
+ rtnl_unlock();
return err;
-}
+}
static void __exit ifb_cleanup_module(void)
{
- int i;
-
- for (i = 0; i < numifbs; i++)
- ifb_free_one(i);
- kfree(ifbs);
+ rtnl_link_unregister(&ifb_link_ops);
}
module_init(ifb_init_module);
module_exit(ifb_cleanup_module);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Jamal Hadi Salim");
+MODULE_ALIAS_RTNL_LINK("ifb");
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff