* If we don't do this there is a chance ndo_poll_controller
* or ndo_poll may be running while we open the device
*/
- netpoll_rx_disable(dev);
+ netpoll_poll_disable(dev);
ret = call_netdevice_notifiers(NETDEV_PRE_UP, dev);
ret = notifier_to_errno(ret);
if (!ret && ops->ndo_open)
ret = ops->ndo_open(dev);
- netpoll_rx_enable(dev);
+ netpoll_poll_enable(dev);
if (ret)
clear_bit(__LINK_STATE_START, &dev->state);
might_sleep();
list_for_each_entry(dev, head, close_list) {
+ /* Temporarily disable netpoll until the interface is down */
+ netpoll_poll_disable(dev);
+
call_netdevice_notifiers(NETDEV_GOING_DOWN, dev);
clear_bit(__LINK_STATE_START, &dev->state);
dev->flags &= ~IFF_UP;
net_dmaengine_put();
+ netpoll_poll_enable(dev);
}
return 0;
int retval;
LIST_HEAD(single);
- /* Temporarily disable netpoll until the interface is down */
- netpoll_rx_disable(dev);
-
list_add(&dev->close_list, &single);
retval = __dev_close_many(&single);
list_del(&single);
- netpoll_rx_enable(dev);
return retval;
}
if (dev->flags & IFF_UP) {
LIST_HEAD(single);
- /* Block netpoll rx while the interface is going down */
- netpoll_rx_disable(dev);
-
list_add(&dev->close_list, &single);
dev_close_many(&single);
list_del(&single);
-
- netpoll_rx_enable(dev);
}
return 0;
}
__net_timestamp(SKB); \
} \
-static inline bool is_skb_forwardable(struct net_device *dev,
- struct sk_buff *skb)
+bool is_skb_forwardable(struct net_device *dev, struct sk_buff *skb)
{
unsigned int len;
return false;
}
+EXPORT_SYMBOL_GPL(is_skb_forwardable);
/**
* dev_forward_skb - loopback an skb to another netif
rc = -ENETDOWN;
rcu_read_unlock_bh();
+ atomic_long_inc(&dev->tx_dropped);
kfree_skb(skb);
return rc;
out:
flow_table = rcu_dereference(rxqueue->rps_flow_table);
if (!flow_table)
goto out;
- flow_id = skb->rxhash & flow_table->mask;
+ flow_id = skb_get_hash(skb) & flow_table->mask;
rc = dev->netdev_ops->ndo_rx_flow_steer(dev, skb,
rxq_index, flow_id);
if (rc < 0)
struct rps_sock_flow_table *sock_flow_table;
int cpu = -1;
u16 tcpu;
+ u32 hash;
if (skb_rx_queue_recorded(skb)) {
u16 index = skb_get_rx_queue(skb);
}
skb_reset_network_header(skb);
- if (!skb_get_hash(skb))
+ hash = skb_get_hash(skb);
+ if (!hash)
goto done;
flow_table = rcu_dereference(rxqueue->rps_flow_table);
u16 next_cpu;
struct rps_dev_flow *rflow;
- rflow = &flow_table->flows[skb->rxhash & flow_table->mask];
+ rflow = &flow_table->flows[hash & flow_table->mask];
tcpu = rflow->cpu;
- next_cpu = sock_flow_table->ents[skb->rxhash &
- sock_flow_table->mask];
+ next_cpu = sock_flow_table->ents[hash & sock_flow_table->mask];
/*
* If the desired CPU (where last recvmsg was done) is
}
if (map) {
- tcpu = map->cpus[((u64) skb->rxhash * map->len) >> 32];
+ tcpu = map->cpus[((u64) hash * map->len) >> 32];
if (cpu_online(tcpu)) {
cpu = tcpu;
{
int ret;
- /* if netpoll wants it, pretend we never saw it */
- if (netpoll_rx(skb))
- return NET_RX_DROP;
-
net_timestamp_check(netdev_tstamp_prequeue, skb);
trace_netif_rx(skb);
* @rx_handler: receive handler to register
* @rx_handler_data: data pointer that is used by rx handler
*
- * Register a receive hander for a device. This handler will then be
+ * Register a receive handler for a device. This handler will then be
* called from __netif_receive_skb. A negative errno code is returned
* on a failure.
*
static bool skb_pfmemalloc_protocol(struct sk_buff *skb)
{
switch (skb->protocol) {
- case __constant_htons(ETH_P_ARP):
- case __constant_htons(ETH_P_IP):
- case __constant_htons(ETH_P_IPV6):
- case __constant_htons(ETH_P_8021Q):
- case __constant_htons(ETH_P_8021AD):
+ case htons(ETH_P_ARP):
+ case htons(ETH_P_IP):
+ case htons(ETH_P_IPV6):
+ case htons(ETH_P_8021Q):
+ case htons(ETH_P_8021AD):
return true;
default:
return false;
trace_netif_receive_skb(skb);
- /* if we've gotten here through NAPI, check netpoll */
- if (netpoll_receive_skb(skb))
- goto out;
-
orig_dev = skb->dev;
skb_reset_network_header(skb);
unlock:
rcu_read_unlock();
-out:
return ret;
}
diffs |= p->vlan_tci ^ skb->vlan_tci;
if (maclen == ETH_HLEN)
diffs |= compare_ether_header(skb_mac_header(p),
- skb_gro_mac_header(skb));
+ skb_mac_header(skb));
else if (!diffs)
diffs = memcmp(skb_mac_header(p),
- skb_gro_mac_header(skb),
+ skb_mac_header(skb),
maclen);
NAPI_GRO_CB(p)->same_flow = !diffs;
}
}
}
+static void gro_pull_from_frag0(struct sk_buff *skb, int grow)
+{
+ struct skb_shared_info *pinfo = skb_shinfo(skb);
+
+ BUG_ON(skb->end - skb->tail < grow);
+
+ memcpy(skb_tail_pointer(skb), NAPI_GRO_CB(skb)->frag0, grow);
+
+ skb->data_len -= grow;
+ skb->tail += grow;
+
+ pinfo->frags[0].page_offset += grow;
+ skb_frag_size_sub(&pinfo->frags[0], grow);
+
+ if (unlikely(!skb_frag_size(&pinfo->frags[0]))) {
+ skb_frag_unref(skb, 0);
+ memmove(pinfo->frags, pinfo->frags + 1,
+ --pinfo->nr_frags * sizeof(pinfo->frags[0]));
+ }
+}
+
static enum gro_result dev_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
{
struct sk_buff **pp = NULL;
struct list_head *head = &offload_base;
int same_flow;
enum gro_result ret;
+ int grow;
- if (!(skb->dev->features & NETIF_F_GRO) || netpoll_rx_on(skb))
+ if (!(skb->dev->features & NETIF_F_GRO))
goto normal;
if (skb_is_gso(skb) || skb_has_frag_list(skb))
goto normal;
- skb_gro_reset_offset(skb);
gro_list_prepare(napi, skb);
NAPI_GRO_CB(skb)->csum = skb->csum; /* Needed for CHECKSUM_COMPLETE */
ret = GRO_HELD;
pull:
- if (skb_headlen(skb) < skb_gro_offset(skb)) {
- int grow = skb_gro_offset(skb) - skb_headlen(skb);
-
- BUG_ON(skb->end - skb->tail < grow);
-
- memcpy(skb_tail_pointer(skb), NAPI_GRO_CB(skb)->frag0, grow);
-
- skb->tail += grow;
- skb->data_len -= grow;
-
- skb_shinfo(skb)->frags[0].page_offset += grow;
- skb_frag_size_sub(&skb_shinfo(skb)->frags[0], grow);
-
- if (unlikely(!skb_frag_size(&skb_shinfo(skb)->frags[0]))) {
- skb_frag_unref(skb, 0);
- memmove(skb_shinfo(skb)->frags,
- skb_shinfo(skb)->frags + 1,
- --skb_shinfo(skb)->nr_frags * sizeof(skb_frag_t));
- }
- }
-
+ grow = skb_gro_offset(skb) - skb_headlen(skb);
+ if (grow > 0)
+ gro_pull_from_frag0(skb, grow);
ok:
return ret;
{
trace_napi_gro_receive_entry(skb);
+ skb_gro_reset_offset(skb);
+
return napi_skb_finish(dev_gro_receive(napi, skb), skb);
}
EXPORT_SYMBOL(napi_gro_receive);
}
EXPORT_SYMBOL(napi_get_frags);
-static gro_result_t napi_frags_finish(struct napi_struct *napi, struct sk_buff *skb,
- gro_result_t ret)
+static gro_result_t napi_frags_finish(struct napi_struct *napi,
+ struct sk_buff *skb,
+ gro_result_t ret)
{
switch (ret) {
case GRO_NORMAL:
- if (netif_receive_skb_internal(skb))
+ case GRO_HELD:
+ __skb_push(skb, ETH_HLEN);
+ skb->protocol = eth_type_trans(skb, skb->dev);
+ if (ret == GRO_NORMAL && netif_receive_skb_internal(skb))
ret = GRO_DROP;
break;
napi_reuse_skb(napi, skb);
break;
- case GRO_HELD:
case GRO_MERGED:
break;
}
return ret;
}
+/* Upper GRO stack assumes network header starts at gro_offset=0
+ * Drivers could call both napi_gro_frags() and napi_gro_receive()
+ * We copy ethernet header into skb->data to have a common layout.
+ */
static struct sk_buff *napi_frags_skb(struct napi_struct *napi)
{
struct sk_buff *skb = napi->skb;
+ const struct ethhdr *eth;
+ unsigned int hlen = sizeof(*eth);
napi->skb = NULL;
- if (unlikely(!pskb_may_pull(skb, sizeof(struct ethhdr)))) {
- napi_reuse_skb(napi, skb);
- return NULL;
+ skb_reset_mac_header(skb);
+ skb_gro_reset_offset(skb);
+
+ eth = skb_gro_header_fast(skb, 0);
+ if (unlikely(skb_gro_header_hard(skb, hlen))) {
+ eth = skb_gro_header_slow(skb, hlen, 0);
+ if (unlikely(!eth)) {
+ napi_reuse_skb(napi, skb);
+ return NULL;
+ }
+ } else {
+ gro_pull_from_frag0(skb, hlen);
+ NAPI_GRO_CB(skb)->frag0 += hlen;
+ NAPI_GRO_CB(skb)->frag0_len -= hlen;
}
- skb->protocol = eth_type_trans(skb, skb->dev);
+ __skb_pull(skb, hlen);
+
+ /*
+ * This works because the only protocols we care about don't require
+ * special handling.
+ * We'll fix it up properly in napi_frags_finish()
+ */
+ skb->protocol = eth->h_proto;
return skb;
}
struct softnet_data *next = remsd->rps_ipi_next;
if (cpu_online(remsd->cpu))
- __smp_call_function_single(remsd->cpu,
- &remsd->csd, 0);
+ smp_call_function_single_async(remsd->cpu,
+ &remsd->csd);
remsd = next;
}
} else
}
}
+#ifdef CONFIG_NET_RX_BUSY_POLL
+ if (dev->netdev_ops->ndo_busy_poll)
+ features |= NETIF_F_BUSY_POLL;
+ else
+#endif
+ features &= ~NETIF_F_BUSY_POLL;
+
return features;
}
netdev_stats_to_stats64(storage, &dev->stats);
}
storage->rx_dropped += atomic_long_read(&dev->rx_dropped);
+ storage->tx_dropped += atomic_long_read(&dev->tx_dropped);
return storage;
}
EXPORT_SYMBOL(dev_get_stats);
projects / linux-2.6-microblaze.git / blobdiff