* @ha: hardware address
*
* Search for an interface by MAC address. Returns NULL if the device
- * is not found or a pointer to the device. The caller must hold RCU
+ * is not found or a pointer to the device.
+ * The caller must hold RCU or RTNL.
* The returned device has not had its ref count increased
* and the caller must therefore be careful about locking
*
}
EXPORT_SYMBOL(netif_device_attach);
-static bool can_checksum_protocol(unsigned long features, __be16 protocol)
-{
- return ((features & NETIF_F_NO_CSUM) ||
- ((features & NETIF_F_V4_CSUM) &&
- protocol == htons(ETH_P_IP)) ||
- ((features & NETIF_F_V6_CSUM) &&
- protocol == htons(ETH_P_IPV6)) ||
- ((features & NETIF_F_FCOE_CRC) &&
- protocol == htons(ETH_P_FCOE)));
-}
-
-static bool dev_can_checksum(struct net_device *dev, struct sk_buff *skb)
-{
- __be16 protocol = skb->protocol;
- int features = dev->features;
-
- if (vlan_tx_tag_present(skb)) {
- features &= dev->vlan_features;
- } else if (protocol == htons(ETH_P_8021Q)) {
- struct vlan_ethhdr *veh = (struct vlan_ethhdr *)skb->data;
- protocol = veh->h_vlan_encapsulated_proto;
- features &= dev->vlan_features;
- }
-
- return can_checksum_protocol(features, protocol);
-}
-
/**
* skb_dev_set -- assign a new device to a buffer
* @skb: buffer for the new device
/**
* dev_gso_segment - Perform emulated hardware segmentation on skb.
* @skb: buffer to segment
+ * @features: device features as applicable to this skb
*
* This function segments the given skb and stores the list of segments
* in skb->next.
*/
-static int dev_gso_segment(struct sk_buff *skb)
+static int dev_gso_segment(struct sk_buff *skb, int features)
{
- struct net_device *dev = skb->dev;
struct sk_buff *segs;
- int features = dev->features & ~(illegal_highdma(dev, skb) ?
- NETIF_F_SG : 0);
segs = skb_gso_segment(skb, features);
}
}
-int netif_get_vlan_features(struct sk_buff *skb, struct net_device *dev)
+static bool can_checksum_protocol(unsigned long features, __be16 protocol)
+{
+ return ((features & NETIF_F_GEN_CSUM) ||
+ ((features & NETIF_F_V4_CSUM) &&
+ protocol == htons(ETH_P_IP)) ||
+ ((features & NETIF_F_V6_CSUM) &&
+ protocol == htons(ETH_P_IPV6)) ||
+ ((features & NETIF_F_FCOE_CRC) &&
+ protocol == htons(ETH_P_FCOE)));
+}
+
+static int harmonize_features(struct sk_buff *skb, __be16 protocol, int features)
+{
+ if (!can_checksum_protocol(features, protocol)) {
+ features &= ~NETIF_F_ALL_CSUM;
+ features &= ~NETIF_F_SG;
+ } else if (illegal_highdma(skb->dev, skb)) {
+ features &= ~NETIF_F_SG;
+ }
+
+ return features;
+}
+
+int netif_skb_features(struct sk_buff *skb)
{
__be16 protocol = skb->protocol;
+ int features = skb->dev->features;
if (protocol == htons(ETH_P_8021Q)) {
struct vlan_ethhdr *veh = (struct vlan_ethhdr *)skb->data;
protocol = veh->h_vlan_encapsulated_proto;
- } else if (!skb->vlan_tci)
- return dev->features;
+ } else if (!vlan_tx_tag_present(skb)) {
+ return harmonize_features(skb, protocol, features);
+ }
- if (protocol != htons(ETH_P_8021Q))
- return dev->features & dev->vlan_features;
- else
- return 0;
+ features &= (skb->dev->vlan_features | NETIF_F_HW_VLAN_TX);
+
+ if (protocol != htons(ETH_P_8021Q)) {
+ return harmonize_features(skb, protocol, features);
+ } else {
+ features &= NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST |
+ NETIF_F_GEN_CSUM | NETIF_F_HW_VLAN_TX;
+ return harmonize_features(skb, protocol, features);
+ }
}
-EXPORT_SYMBOL(netif_get_vlan_features);
+EXPORT_SYMBOL(netif_skb_features);
/*
* Returns true if either:
* support DMA from it.
*/
static inline int skb_needs_linearize(struct sk_buff *skb,
- struct net_device *dev)
+ int features)
{
- if (skb_is_nonlinear(skb)) {
- int features = dev->features;
-
- if (vlan_tx_tag_present(skb))
- features &= dev->vlan_features;
-
- return (skb_has_frag_list(skb) &&
- !(features & NETIF_F_FRAGLIST)) ||
+ return skb_is_nonlinear(skb) &&
+ ((skb_has_frag_list(skb) &&
+ !(features & NETIF_F_FRAGLIST)) ||
(skb_shinfo(skb)->nr_frags &&
- (!(features & NETIF_F_SG) ||
- illegal_highdma(dev, skb)));
- }
-
- return 0;
+ !(features & NETIF_F_SG)));
}
int dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
int rc = NETDEV_TX_OK;
if (likely(!skb->next)) {
+ int features;
+
/*
* If device doesnt need skb->dst, release it right now while
* its hot in this cpu cache
skb_orphan_try(skb);
+ features = netif_skb_features(skb);
+
if (vlan_tx_tag_present(skb) &&
- !(dev->features & NETIF_F_HW_VLAN_TX)) {
+ !(features & NETIF_F_HW_VLAN_TX)) {
skb = __vlan_put_tag(skb, vlan_tx_tag_get(skb));
if (unlikely(!skb))
goto out;
skb->vlan_tci = 0;
}
- if (netif_needs_gso(dev, skb)) {
- if (unlikely(dev_gso_segment(skb)))
+ if (netif_needs_gso(skb, features)) {
+ if (unlikely(dev_gso_segment(skb, features)))
goto out_kfree_skb;
if (skb->next)
goto gso;
} else {
- if (skb_needs_linearize(skb, dev) &&
+ if (skb_needs_linearize(skb, features) &&
__skb_linearize(skb))
goto out_kfree_skb;
if (skb->ip_summed == CHECKSUM_PARTIAL) {
skb_set_transport_header(skb,
skb_checksum_start_offset(skb));
- if (!dev_can_checksum(dev, skb) &&
+ if (!(features & NETIF_F_ALL_CSUM) &&
skb_checksum_help(skb))
goto out_kfree_skb;
}
*/
if (!(dev->priv_flags & IFF_XMIT_DST_RELEASE))
skb_dst_force(skb);
- __qdisc_update_bstats(q, skb->len);
+
+ qdisc_skb_cb(skb)->pkt_len = skb->len;
+ qdisc_bstats_update(q, skb);
+
if (sch_direct_xmit(skb, q, dev, txq, root_lock)) {
if (unlikely(contended)) {
spin_unlock(&q->busylock);
}
}
-/**
- * dev_txq_stats_fold - fold tx_queues stats
- * @dev: device to get statistics from
- * @stats: struct rtnl_link_stats64 to hold results
- */
-void dev_txq_stats_fold(const struct net_device *dev,
- struct rtnl_link_stats64 *stats)
-{
- u64 tx_bytes = 0, tx_packets = 0, tx_dropped = 0;
- unsigned int i;
- struct netdev_queue *txq;
-
- for (i = 0; i < dev->num_tx_queues; i++) {
- txq = netdev_get_tx_queue(dev, i);
- spin_lock_bh(&txq->_xmit_lock);
- tx_bytes += txq->tx_bytes;
- tx_packets += txq->tx_packets;
- tx_dropped += txq->tx_dropped;
- spin_unlock_bh(&txq->_xmit_lock);
- }
- if (tx_bytes || tx_packets || tx_dropped) {
- stats->tx_bytes = tx_bytes;
- stats->tx_packets = tx_packets;
- stats->tx_dropped = tx_dropped;
- }
-}
-EXPORT_SYMBOL(dev_txq_stats_fold);
-
/* Convert net_device_stats to rtnl_link_stats64. They have the same
* fields in the same order, with only the type differing.
*/
netdev_stats_to_stats64(storage, ops->ndo_get_stats(dev));
} else {
netdev_stats_to_stats64(storage, &dev->stats);
- dev_txq_stats_fold(dev, storage);
}
storage->rx_dropped += atomic_long_read(&dev->rx_dropped);
return storage;
}
/**
- * alloc_netdev_mq - allocate network device
+ * alloc_netdev_mqs - allocate network device
* @sizeof_priv: size of private data to allocate space for
* @name: device name format string
* @setup: callback to initialize device
- * @queue_count: the number of subqueues to allocate
+ * @txqs: the number of TX subqueues to allocate
+ * @rxqs: the number of RX subqueues to allocate
*
* Allocates a struct net_device with private data area for driver use
* and performs basic initialization. Also allocates subquue structs
- * for each queue on the device at the end of the netdevice.
+ * for each queue on the device.
*/
-struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
- void (*setup)(struct net_device *), unsigned int queue_count)
+struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
+ void (*setup)(struct net_device *),
+ unsigned int txqs, unsigned int rxqs)
{
struct net_device *dev;
size_t alloc_size;
BUG_ON(strlen(name) >= sizeof(dev->name));
- if (queue_count < 1) {
+ if (txqs < 1) {
pr_err("alloc_netdev: Unable to allocate device "
"with zero queues.\n");
return NULL;
}
+#ifdef CONFIG_RPS
+ if (rxqs < 1) {
+ pr_err("alloc_netdev: Unable to allocate device "
+ "with zero RX queues.\n");
+ return NULL;
+ }
+#endif
+
alloc_size = sizeof(struct net_device);
if (sizeof_priv) {
/* ensure 32-byte alignment of private area */
dev_net_set(dev, &init_net);
- dev->num_tx_queues = queue_count;
- dev->real_num_tx_queues = queue_count;
+ dev->num_tx_queues = txqs;
+ dev->real_num_tx_queues = txqs;
if (netif_alloc_netdev_queues(dev))
goto free_pcpu;
#ifdef CONFIG_RPS
- dev->num_rx_queues = queue_count;
- dev->real_num_rx_queues = queue_count;
+ dev->num_rx_queues = rxqs;
+ dev->real_num_rx_queues = rxqs;
if (netif_alloc_rx_queues(dev))
goto free_pcpu;
#endif
kfree(p);
return NULL;
}
-EXPORT_SYMBOL(alloc_netdev_mq);
+EXPORT_SYMBOL(alloc_netdev_mqs);
/**
* free_netdev - free network device
git.openpandora.org / pandora-kernel.git / blobdiff