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path: root/drivers/net/ifb.c
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Diffstat (limited to 'drivers/net/ifb.c')
-rw-r--r--drivers/net/ifb.c128
1 files changed, 81 insertions, 47 deletions
diff --git a/drivers/net/ifb.c b/drivers/net/ifb.c
index ab9f675c5b8..46a7790be00 100644
--- a/drivers/net/ifb.c
+++ b/drivers/net/ifb.c
@@ -32,28 +32,25 @@
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/init.h>
+#include <linux/interrupt.h>
#include <linux/moduleparam.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 tasklet_struct ifb_tasklet;
int tasklet_pending;
- /* mostly debug stats leave in for now */
- unsigned long st_task_enter; /* tasklet entered */
- unsigned long st_txq_refl_try; /* transmit queue refill attempt */
- unsigned long st_rxq_enter; /* receive queue entered */
- unsigned long st_rx2tx_tran; /* receive to trasmit transfers */
- unsigned long st_rxq_notenter; /*receiveQ not entered, resched */
- unsigned long st_rx_frm_egr; /* received from egress path */
- unsigned long st_rx_frm_ing; /* received from ingress path */
- unsigned long st_rxq_check;
- unsigned long st_rxq_rsch;
+
+ struct u64_stats_sync rsync;
struct sk_buff_head rq;
+ u64 rx_packets;
+ u64 rx_bytes;
+
+ struct u64_stats_sync tsync;
struct sk_buff_head tq;
+ u64 tx_packets;
+ u64 tx_bytes;
};
static int numifbs = 2;
@@ -65,69 +62,61 @@ static int ifb_close(struct net_device *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 = &_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(txq)) {
- dp->st_rxq_enter++;
- while ((skb = skb_dequeue(&dp->rq)) != NULL) {
- skb_queue_tail(&dp->tq, skb);
- dp->st_rx2tx_tran++;
- }
+ skb_queue_splice_tail_init(&dp->rq, &dp->tq);
__netif_tx_unlock(txq);
} else {
/* reschedule */
- dp->st_rxq_notenter++;
goto resched;
}
}
- while ((skb = skb_dequeue(&dp->tq)) != NULL) {
+ while ((skb = __skb_dequeue(&dp->tq)) != NULL) {
u32 from = G_TC_FROM(skb->tc_verd);
skb->tc_verd = 0;
skb->tc_verd = SET_TC_NCLS(skb->tc_verd);
- stats->tx_packets++;
- stats->tx_bytes +=skb->len;
+
+ u64_stats_update_begin(&dp->tsync);
+ dp->tx_packets++;
+ dp->tx_bytes += skb->len;
+ u64_stats_update_end(&dp->tsync);
rcu_read_lock();
- skb->dev = dev_get_by_index_rcu(&init_net, skb->skb_iif);
+ skb->dev = dev_get_by_index_rcu(dev_net(_dev), skb->skb_iif);
if (!skb->dev) {
rcu_read_unlock();
dev_kfree_skb(skb);
- stats->tx_dropped++;
+ _dev->stats.tx_dropped++;
+ if (skb_queue_len(&dp->tq) != 0)
+ goto resched;
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);
+ netif_receive_skb(skb);
} else
BUG();
}
if (__netif_tx_trylock(txq)) {
- dp->st_rxq_check++;
if ((skb = skb_peek(&dp->rq)) == NULL) {
dp->tasklet_pending = 0;
if (netif_queue_stopped(_dev))
netif_wake_queue(_dev);
} else {
- dp->st_rxq_rsch++;
__netif_tx_unlock(txq);
goto resched;
}
@@ -140,13 +129,46 @@ resched:
}
+static struct rtnl_link_stats64 *ifb_stats64(struct net_device *dev,
+ struct rtnl_link_stats64 *stats)
+{
+ struct ifb_private *dp = netdev_priv(dev);
+ unsigned int start;
+
+ do {
+ start = u64_stats_fetch_begin_irq(&dp->rsync);
+ stats->rx_packets = dp->rx_packets;
+ stats->rx_bytes = dp->rx_bytes;
+ } while (u64_stats_fetch_retry_irq(&dp->rsync, start));
+
+ do {
+ start = u64_stats_fetch_begin_irq(&dp->tsync);
+
+ stats->tx_packets = dp->tx_packets;
+ stats->tx_bytes = dp->tx_bytes;
+
+ } while (u64_stats_fetch_retry_irq(&dp->tsync, start));
+
+ stats->rx_dropped = dev->stats.rx_dropped;
+ stats->tx_dropped = dev->stats.tx_dropped;
+
+ return stats;
+}
+
+
static const struct net_device_ops ifb_netdev_ops = {
.ndo_open = ifb_open,
.ndo_stop = ifb_close,
+ .ndo_get_stats64 = ifb_stats64,
.ndo_start_xmit = ifb_xmit,
.ndo_validate_addr = eth_validate_addr,
};
+#define IFB_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_FRAGLIST | \
+ NETIF_F_TSO_ECN | NETIF_F_TSO | NETIF_F_TSO6 | \
+ NETIF_F_HIGHDMA | NETIF_F_HW_VLAN_CTAG_TX | \
+ NETIF_F_HW_VLAN_STAG_TX)
+
static void ifb_setup(struct net_device *dev)
{
/* Initialize the device structure. */
@@ -157,24 +179,29 @@ static void ifb_setup(struct net_device *dev)
ether_setup(dev);
dev->tx_queue_len = TX_Q_LIMIT;
+ dev->features |= IFB_FEATURES;
+ dev->vlan_features |= IFB_FEATURES & ~(NETIF_F_HW_VLAN_CTAG_TX |
+ NETIF_F_HW_VLAN_STAG_TX);
+
dev->flags |= IFF_NOARP;
dev->flags &= ~IFF_MULTICAST;
- dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
- random_ether_addr(dev->dev_addr);
+ dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
+ eth_hw_addr_random(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 = &dev->stats;
u32 from = G_TC_FROM(skb->tc_verd);
- stats->rx_packets++;
- stats->rx_bytes+=skb->len;
+ u64_stats_update_begin(&dp->rsync);
+ dp->rx_packets++;
+ dp->rx_bytes += skb->len;
+ u64_stats_update_end(&dp->rsync);
if (!(from & (AT_INGRESS|AT_EGRESS)) || !skb->skb_iif) {
dev_kfree_skb(skb);
- stats->rx_dropped++;
+ dev->stats.rx_dropped++;
return NETDEV_TX_OK;
}
@@ -182,7 +209,7 @@ static netdev_tx_t ifb_xmit(struct sk_buff *skb, struct net_device *dev)
netif_stop_queue(dev);
}
- skb_queue_tail(&dp->rq, skb);
+ __skb_queue_tail(&dp->rq, skb);
if (!dp->tasklet_pending) {
dp->tasklet_pending = 1;
tasklet_schedule(&dp->ifb_tasklet);
@@ -197,8 +224,8 @@ static int ifb_close(struct net_device *dev)
tasklet_kill(&dp->ifb_tasklet);
netif_stop_queue(dev);
- skb_queue_purge(&dp->rq);
- skb_queue_purge(&dp->tq);
+ __skb_queue_purge(&dp->rq);
+ __skb_queue_purge(&dp->tq);
return 0;
}
@@ -207,8 +234,8 @@ static int ifb_open(struct net_device *dev)
struct ifb_private *dp = netdev_priv(dev);
tasklet_init(&dp->ifb_tasklet, ri_tasklet, (unsigned long)dev);
- skb_queue_head_init(&dp->rq);
- skb_queue_head_init(&dp->tq);
+ __skb_queue_head_init(&dp->rq);
+ __skb_queue_head_init(&dp->tq);
netif_start_queue(dev);
return 0;
@@ -239,6 +266,7 @@ MODULE_PARM_DESC(numifbs, "Number of ifb devices");
static int __init ifb_init_one(int index)
{
struct net_device *dev_ifb;
+ struct ifb_private *dp;
int err;
dev_ifb = alloc_netdev(sizeof(struct ifb_private),
@@ -247,9 +275,9 @@ static int __init ifb_init_one(int index)
if (!dev_ifb)
return -ENOMEM;
- err = dev_alloc_name(dev_ifb, dev_ifb->name);
- if (err < 0)
- goto err;
+ dp = netdev_priv(dev_ifb);
+ u64_stats_init(&dp->rsync);
+ u64_stats_init(&dp->tsync);
dev_ifb->rtnl_link_ops = &ifb_link_ops;
err = register_netdevice(dev_ifb);
@@ -269,11 +297,17 @@ static int __init ifb_init_module(void)
rtnl_lock();
err = __rtnl_link_register(&ifb_link_ops);
+ if (err < 0)
+ goto out;
- for (i = 0; i < numifbs && !err; i++)
+ for (i = 0; i < numifbs && !err; i++) {
err = ifb_init_one(i);
+ cond_resched();
+ }
if (err)
__rtnl_link_unregister(&ifb_link_ops);
+
+out:
rtnl_unlock();
return err;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 13:06:38 +0000