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netdev: add more functions to netdevice ops

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This patch moves neigh_setup and hard_start_xmit into the network device ops
structure. For bisection, fix all the previously converted drivers as well.
Bonding driver took the biggest hit on this.

Added a prefetch of the hard_start_xmit in the fast path to try and reduce
any impact this would have.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stephen Hemminger
2008-11-20 20:14:53 -08:00
committed by David S. Miller
parent 6ab33d5171
commit 008298231a
36 changed files with 183 additions and 93 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
net/core/dev.c
View File

@@ -1660,6 +1660,9 @@ static int dev_gso_segment(struct sk_buff *skb)
int dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
struct netdev_queue *txq)
{
const struct net_device_ops *ops = dev->netdev_ops;
prefetch(&dev->netdev_ops->ndo_start_xmit);
if (likely(!skb->next)) {
if (!list_empty(&ptype_all))
dev_queue_xmit_nit(skb, dev);
@@ -1671,7 +1674,7 @@ int dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
goto gso;
}
return dev->hard_start_xmit(skb, dev);
return ops->ndo_start_xmit(skb, dev);
}
gso:
@@ -1681,7 +1684,7 @@ gso:
skb->next = nskb->next;
nskb->next = NULL;
rc = dev->hard_start_xmit(nskb, dev);
rc = ops->ndo_start_xmit(nskb, dev);
if (unlikely(rc)) {
nskb->next = skb->next;
skb->next = nskb;
@@ -1755,10 +1758,11 @@ static u16 simple_tx_hash(struct net_device *dev, struct sk_buff *skb)
static struct netdev_queue *dev_pick_tx(struct net_device *dev,
struct sk_buff *skb)
{
const struct net_device_ops *ops = dev->netdev_ops;
u16 queue_index = 0;
if (dev->select_queue)
queue_index = dev->select_queue(dev, skb);
if (ops->ndo_select_queue)
queue_index = ops->ndo_select_queue(dev, skb);
else if (dev->real_num_tx_queues > 1)
queue_index = simple_tx_hash(dev, skb);

6
net/core/neighbour.c
View File

@@ -1327,9 +1327,9 @@ struct neigh_parms *neigh_parms_alloc(struct net_device *dev,
struct neigh_table *tbl)
{
struct neigh_parms *p, *ref;
struct net *net;
struct net *net = dev_net(dev);
const struct net_device_ops *ops = dev->netdev_ops;
net = dev_net(dev);
ref = lookup_neigh_params(tbl, net, 0);
if (!ref)
return NULL;
@@ -1341,7 +1341,7 @@ struct neigh_parms *neigh_parms_alloc(struct net_device *dev,
p->reachable_time =
neigh_rand_reach_time(p->base_reachable_time);
if (dev->neigh_setup && dev->neigh_setup(dev, p)) {
if (ops->ndo_neigh_setup && ops->ndo_neigh_setup(dev, p)) {
kfree(p);
return NULL;
}

6
net/core/netpoll.c
View File

@@ -58,6 +58,7 @@ static void queue_process(struct work_struct *work)
while ((skb = skb_dequeue(&npinfo->txq))) {
struct net_device *dev = skb->dev;
const struct net_device_ops *ops = dev->netdev_ops;
struct netdev_queue *txq;
if (!netif_device_present(dev) || !netif_running(dev)) {
@@ -71,7 +72,7 @@ static void queue_process(struct work_struct *work)
__netif_tx_lock(txq, smp_processor_id());
if (netif_tx_queue_stopped(txq) ||
netif_tx_queue_frozen(txq) ||
dev->hard_start_xmit(skb, dev) != NETDEV_TX_OK) {
ops->ndo_start_xmit(skb, dev) != NETDEV_TX_OK) {
skb_queue_head(&npinfo->txq, skb);
__netif_tx_unlock(txq);
local_irq_restore(flags);
@@ -273,6 +274,7 @@ static void netpoll_send_skb(struct netpoll *np, struct sk_buff *skb)
int status = NETDEV_TX_BUSY;
unsigned long tries;
struct net_device *dev = np->dev;
const struct net_device_ops *ops = dev->netdev_ops;
struct netpoll_info *npinfo = np->dev->npinfo;
if (!npinfo || !netif_running(dev) || !netif_device_present(dev)) {
@@ -293,7 +295,7 @@ static void netpoll_send_skb(struct netpoll *np, struct sk_buff *skb)
tries > 0; --tries) {
if (__netif_tx_trylock(txq)) {
if (!netif_tx_queue_stopped(txq))
status = dev->hard_start_xmit(skb, dev);
status = ops->ndo_start_xmit(skb, dev);
__netif_tx_unlock(txq);
if (status == NETDEV_TX_OK)

8
net/core/pktgen.c
View File

@@ -3352,14 +3352,14 @@ static void pktgen_rem_thread(struct pktgen_thread *t)
static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev)
{
struct net_device *odev = NULL;
struct net_device *odev = pkt_dev->odev;
int (*xmit)(struct sk_buff *, struct net_device *)
= odev->netdev_ops->ndo_start_xmit;
struct netdev_queue *txq;
__u64 idle_start = 0;
u16 queue_map;
int ret;
odev = pkt_dev->odev;
if (pkt_dev->delay_us || pkt_dev->delay_ns) {
u64 now;
@@ -3440,7 +3440,7 @@ static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev)
atomic_inc(&(pkt_dev->skb->users));
retry_now:
ret = odev->hard_start_xmit(pkt_dev->skb, odev);
ret = (*xmit)(pkt_dev->skb, odev);
if (likely(ret == NETDEV_TX_OK)) {
pkt_dev->last_ok = 1;
pkt_dev->sofar++;