#include <trace/events/skb.h>
#include <linux/pci.h>
#include <linux/inetdevice.h>
+#include <linux/cpu_rmap.h>
#include "net-sysfs.h"
ASSERT_RTNL();
- /*
- * Is it even present?
- */
if (!netif_device_present(dev))
return -ENODEV;
if (ret)
return ret;
- /*
- * Call device private open method
- */
set_bit(__LINK_STATE_START, &dev->state);
if (ops->ndo_validate_addr)
if (!ret && ops->ndo_open)
ret = ops->ndo_open(dev);
- /*
- * If it went open OK then:
- */
-
if (ret)
clear_bit(__LINK_STATE_START, &dev->state);
else {
- /*
- * Set the flags.
- */
dev->flags |= IFF_UP;
-
- /*
- * Enable NET_DMA
- */
net_dmaengine_get();
-
- /*
- * Initialize multicasting status
- */
dev_set_rx_mode(dev);
-
- /*
- * Wakeup transmit queue engine
- */
dev_activate(dev);
}
{
int ret;
- /*
- * Is it already up?
- */
if (dev->flags & IFF_UP)
return 0;
- /*
- * Open device
- */
ret = __dev_open(dev);
if (ret < 0)
return ret;
- /*
- * ... and announce new interface.
- */
rtmsg_ifinfo(RTM_NEWLINK, dev, IFF_UP|IFF_RUNNING);
call_netdevice_notifiers(NETDEV_UP, dev);
might_sleep();
list_for_each_entry(dev, head, unreg_list) {
- /*
- * Tell people we are going down, so that they can
- * prepare to death, when device is still operating.
- */
call_netdevice_notifiers(NETDEV_GOING_DOWN, dev);
clear_bit(__LINK_STATE_START, &dev->state);
if (ops->ndo_stop)
ops->ndo_stop(dev);
- /*
- * Device is now down.
- */
-
dev->flags &= ~IFF_UP;
-
- /*
- * Shutdown NET_DMA
- */
net_dmaengine_put();
}
return retval;
}
-int dev_close_many(struct list_head *head)
+static int dev_close_many(struct list_head *head)
{
struct net_device *dev, *tmp;
LIST_HEAD(tmp_list);
__dev_close_many(head);
- /*
- * Tell people we are down
- */
list_for_each_entry(dev, head, unreg_list) {
rtmsg_ifinfo(RTM_NEWLINK, dev, IFF_UP|IFF_RUNNING);
call_netdevice_notifiers(NETDEV_DOWN, dev);
*/
int dev_close(struct net_device *dev)
{
- LIST_HEAD(single);
+ if (dev->flags & IFF_UP) {
+ LIST_HEAD(single);
- list_add(&dev->unreg_list, &single);
- dev_close_many(&single);
- list_del(&single);
+ list_add(&dev->unreg_list, &single);
+ dev_close_many(&single);
+ list_del(&single);
+ }
return 0;
}
EXPORT_SYMBOL(dev_close);
*/
void dev_disable_lro(struct net_device *dev)
{
- if (dev->ethtool_ops && dev->ethtool_ops->get_flags &&
- dev->ethtool_ops->set_flags) {
- u32 flags = dev->ethtool_ops->get_flags(dev);
- if (flags & ETH_FLAG_LRO) {
- flags &= ~ETH_FLAG_LRO;
- dev->ethtool_ops->set_flags(dev, flags);
- }
- }
+ u32 flags;
+
+ if (dev->ethtool_ops && dev->ethtool_ops->get_flags)
+ flags = dev->ethtool_ops->get_flags(dev);
+ else
+ flags = ethtool_op_get_flags(dev);
+
+ if (!(flags & ETH_FLAG_LRO))
+ return;
+
+ __ethtool_set_flags(dev, flags & ~ETH_FLAG_LRO);
WARN_ON(dev->features & NETIF_F_LRO);
}
EXPORT_SYMBOL(dev_disable_lro);
static int dev_boot_phase = 1;
-/*
- * Device change register/unregister. These are not inline or static
- * as we export them to the world.
- */
-
/**
* register_netdevice_notifier - register a network notifier block
* @nb: notifier
ASSERT_RTNL();
return raw_notifier_call_chain(&netdev_chain, val, dev);
}
+EXPORT_SYMBOL(call_netdevice_notifiers);
/* When > 0 there are consumers of rx skb time stamps */
static atomic_t netstamp_needed = ATOMIC_INIT(0);
__net_timestamp(skb);
}
+static inline bool is_skb_forwardable(struct net_device *dev,
+ struct sk_buff *skb)
+{
+ unsigned int len;
+
+ if (!(dev->flags & IFF_UP))
+ return false;
+
+ len = dev->mtu + dev->hard_header_len + VLAN_HLEN;
+ if (skb->len <= len)
+ return true;
+
+ /* if TSO is enabled, we don't care about the length as the packet
+ * could be forwarded without being segmented before
+ */
+ if (skb_is_gso(skb))
+ return true;
+
+ return false;
+}
+
/**
* dev_forward_skb - loopback an skb to another netif
*
skb_orphan(skb);
nf_reset(skb);
- if (unlikely(!(dev->flags & IFF_UP) ||
- (skb->len > (dev->mtu + dev->hard_header_len + VLAN_HLEN)))) {
+ if (unlikely(!is_skb_forwardable(dev, skb))) {
atomic_long_inc(&dev->rx_dropped);
kfree_skb(skb);
return NET_RX_DROP;
rcu_read_unlock();
}
+/* netif_setup_tc - Handle tc mappings on real_num_tx_queues change
+ * @dev: Network device
+ * @txq: number of queues available
+ *
+ * If real_num_tx_queues is changed the tc mappings may no longer be
+ * valid. To resolve this verify the tc mapping remains valid and if
+ * not NULL the mapping. With no priorities mapping to this
+ * offset/count pair it will no longer be used. In the worst case TC0
+ * is invalid nothing can be done so disable priority mappings. If is
+ * expected that drivers will fix this mapping if they can before
+ * calling netif_set_real_num_tx_queues.
+ */
+static void netif_setup_tc(struct net_device *dev, unsigned int txq)
+{
+ int i;
+ struct netdev_tc_txq *tc = &dev->tc_to_txq[0];
+
+ /* If TC0 is invalidated disable TC mapping */
+ if (tc->offset + tc->count > txq) {
+ pr_warning("Number of in use tx queues changed "
+ "invalidating tc mappings. Priority "
+ "traffic classification disabled!\n");
+ dev->num_tc = 0;
+ return;
+ }
+
+ /* Invalidated prio to tc mappings set to TC0 */
+ for (i = 1; i < TC_BITMASK + 1; i++) {
+ int q = netdev_get_prio_tc_map(dev, i);
+
+ tc = &dev->tc_to_txq[q];
+ if (tc->offset + tc->count > txq) {
+ pr_warning("Number of in use tx queues "
+ "changed. Priority %i to tc "
+ "mapping %i is no longer valid "
+ "setting map to 0\n",
+ i, q);
+ netdev_set_prio_tc_map(dev, i, 0);
+ }
+ }
+}
+
/*
* Routine to help set real_num_tx_queues. To avoid skbs mapped to queues
* greater then real_num_tx_queues stale skbs on the qdisc must be flushed.
if (txq < 1 || txq > dev->num_tx_queues)
return -EINVAL;
- if (dev->reg_state == NETREG_REGISTERED) {
+ if (dev->reg_state == NETREG_REGISTERED ||
+ dev->reg_state == NETREG_UNREGISTERING) {
ASSERT_RTNL();
rc = netdev_queue_update_kobjects(dev, dev->real_num_tx_queues,
if (rc)
return rc;
+ if (dev->num_tc)
+ netif_setup_tc(dev, txq);
+
if (txq < dev->real_num_tx_queues)
qdisc_reset_all_tx_gt(dev, txq);
}
* It may return NULL if the skb requires no segmentation. This is
* only possible when GSO is used for verifying header integrity.
*/
-struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features)
+struct sk_buff *skb_gso_segment(struct sk_buff *skb, u32 features)
{
struct sk_buff *segs = ERR_PTR(-EPROTONOSUPPORT);
struct packet_type *ptype;
protocol == htons(ETH_P_FCOE)));
}
-static int harmonize_features(struct sk_buff *skb, __be16 protocol, int features)
+static u32 harmonize_features(struct sk_buff *skb, __be16 protocol, u32 features)
{
if (!can_checksum_protocol(features, protocol)) {
features &= ~NETIF_F_ALL_CSUM;
return features;
}
-int netif_skb_features(struct sk_buff *skb)
+u32 netif_skb_features(struct sk_buff *skb)
{
__be16 protocol = skb->protocol;
- int features = skb->dev->features;
+ u32 features = skb->dev->features;
if (protocol == htons(ETH_P_8021Q)) {
struct vlan_ethhdr *veh = (struct vlan_ethhdr *)skb->data;
int rc = NETDEV_TX_OK;
if (likely(!skb->next)) {
- int features;
+ u32 features;
/*
- * If device doesnt need skb->dst, release it right now while
+ * If device doesn't need skb->dst, release it right now while
* its hot in this cpu cache
*/
if (dev->priv_flags & IFF_XMIT_DST_RELEASE)
nskb->next = NULL;
/*
- * If device doesnt need nskb->dst, release it right now while
+ * If device doesn't need nskb->dst, release it right now while
* its hot in this cpu cache
*/
if (dev->priv_flags & IFF_XMIT_DST_RELEASE)
unsigned int num_tx_queues)
{
u32 hash;
+ u16 qoffset = 0;
+ u16 qcount = num_tx_queues;
if (skb_rx_queue_recorded(skb)) {
hash = skb_get_rx_queue(skb);
return hash;
}
+ if (dev->num_tc) {
+ u8 tc = netdev_get_prio_tc_map(dev, skb->priority);
+ qoffset = dev->tc_to_txq[tc].offset;
+ qcount = dev->tc_to_txq[tc].count;
+ }
+
if (skb->sk && skb->sk->sk_hash)
hash = skb->sk->sk_hash;
else
hash = (__force u16) skb->protocol ^ skb->rxhash;
hash = jhash_1word(hash, hashrnd);
- return (u16) (((u64) hash * num_tx_queues) >> 32);
+ return (u16) (((u64) hash * qcount) >> 32) + qoffset;
}
EXPORT_SYMBOL(__skb_tx_hash);
struct netdev_queue *txq)
{
spinlock_t *root_lock = qdisc_lock(q);
- bool contended = qdisc_is_running(q);
+ bool contended;
int rc;
+ qdisc_skb_cb(skb)->pkt_len = skb->len;
+ qdisc_calculate_pkt_len(skb, q);
/*
* Heuristic to force contended enqueues to serialize on a
* separate lock before trying to get qdisc main lock.
* This permits __QDISC_STATE_RUNNING owner to get the lock more often
* and dequeue packets faster.
*/
+ contended = qdisc_is_running(q);
if (unlikely(contended))
spin_lock(&q->busylock);
if (!(dev->priv_flags & IFF_XMIT_DST_RELEASE))
skb_dst_force(skb);
- qdisc_skb_cb(skb)->pkt_len = skb->len;
qdisc_bstats_update(q, skb);
if (sch_direct_xmit(skb, q, dev, txq, root_lock)) {
rc = NET_XMIT_SUCCESS;
} else {
skb_dst_force(skb);
- rc = qdisc_enqueue_root(skb, q);
+ rc = q->enqueue(skb, q) & NET_XMIT_MASK;
if (qdisc_run_begin(q)) {
if (unlikely(contended)) {
spin_unlock(&q->busylock);
struct rps_sock_flow_table __rcu *rps_sock_flow_table __read_mostly;
EXPORT_SYMBOL(rps_sock_flow_table);
+static struct rps_dev_flow *
+set_rps_cpu(struct net_device *dev, struct sk_buff *skb,
+ struct rps_dev_flow *rflow, u16 next_cpu)
+{
+ u16 tcpu;
+
+ tcpu = rflow->cpu = next_cpu;
+ if (tcpu != RPS_NO_CPU) {
+#ifdef CONFIG_RFS_ACCEL
+ struct netdev_rx_queue *rxqueue;
+ struct rps_dev_flow_table *flow_table;
+ struct rps_dev_flow *old_rflow;
+ u32 flow_id;
+ u16 rxq_index;
+ int rc;
+
+ /* Should we steer this flow to a different hardware queue? */
+ if (!skb_rx_queue_recorded(skb) || !dev->rx_cpu_rmap ||
+ !(dev->features & NETIF_F_NTUPLE))
+ goto out;
+ rxq_index = cpu_rmap_lookup_index(dev->rx_cpu_rmap, next_cpu);
+ if (rxq_index == skb_get_rx_queue(skb))
+ goto out;
+
+ rxqueue = dev->_rx + rxq_index;
+ flow_table = rcu_dereference(rxqueue->rps_flow_table);
+ if (!flow_table)
+ goto out;
+ flow_id = skb->rxhash & flow_table->mask;
+ rc = dev->netdev_ops->ndo_rx_flow_steer(dev, skb,
+ rxq_index, flow_id);
+ if (rc < 0)
+ goto out;
+ old_rflow = rflow;
+ rflow = &flow_table->flows[flow_id];
+ rflow->cpu = next_cpu;
+ rflow->filter = rc;
+ if (old_rflow->filter == rflow->filter)
+ old_rflow->filter = RPS_NO_FILTER;
+ out:
+#endif
+ rflow->last_qtail =
+ per_cpu(softnet_data, tcpu).input_queue_head;
+ }
+
+ return rflow;
+}
+
/*
* get_rps_cpu is called from netif_receive_skb and returns the target
* CPU from the RPS map of the receiving queue for a given skb.
if (unlikely(tcpu != next_cpu) &&
(tcpu == RPS_NO_CPU || !cpu_online(tcpu) ||
((int)(per_cpu(softnet_data, tcpu).input_queue_head -
- rflow->last_qtail)) >= 0)) {
- tcpu = rflow->cpu = next_cpu;
- if (tcpu != RPS_NO_CPU)
- rflow->last_qtail = per_cpu(softnet_data,
- tcpu).input_queue_head;
- }
+ rflow->last_qtail)) >= 0))
+ rflow = set_rps_cpu(dev, skb, rflow, next_cpu);
+
if (tcpu != RPS_NO_CPU && cpu_online(tcpu)) {
*rflowp = rflow;
cpu = tcpu;
return cpu;
}
+#ifdef CONFIG_RFS_ACCEL
+
+/**
+ * rps_may_expire_flow - check whether an RFS hardware filter may be removed
+ * @dev: Device on which the filter was set
+ * @rxq_index: RX queue index
+ * @flow_id: Flow ID passed to ndo_rx_flow_steer()
+ * @filter_id: Filter ID returned by ndo_rx_flow_steer()
+ *
+ * Drivers that implement ndo_rx_flow_steer() should periodically call
+ * this function for each installed filter and remove the filters for
+ * which it returns %true.
+ */
+bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index,
+ u32 flow_id, u16 filter_id)
+{
+ struct netdev_rx_queue *rxqueue = dev->_rx + rxq_index;
+ struct rps_dev_flow_table *flow_table;
+ struct rps_dev_flow *rflow;
+ bool expire = true;
+ int cpu;
+
+ rcu_read_lock();
+ flow_table = rcu_dereference(rxqueue->rps_flow_table);
+ if (flow_table && flow_id <= flow_table->mask) {
+ rflow = &flow_table->flows[flow_id];
+ cpu = ACCESS_ONCE(rflow->cpu);
+ if (rflow->filter == filter_id && cpu != RPS_NO_CPU &&
+ ((int)(per_cpu(softnet_data, cpu).input_queue_head -
+ rflow->last_qtail) <
+ (int)(10 * flow_table->mask)))
+ expire = false;
+ }
+ rcu_read_unlock();
+ return expire;
+}
+EXPORT_SYMBOL(rps_may_expire_flow);
+
+#endif /* CONFIG_RFS_ACCEL */
+
/* Called from hardirq (IPI) context */
static void rps_trigger_softirq(void *data)
{
* when CONFIG_NET_CLS_ACT is? otherwise some useless instructions
* a compare and 2 stores extra right now if we dont have it on
* but have CONFIG_NET_CLS_ACT
- * NOTE: This doesnt stop any functionality; if you dont have
- * the ingress scheduler, you just cant add policies on ingress.
+ * NOTE: This doesn't stop any functionality; if you dont have
+ * the ingress scheduler, you just can't add policies on ingress.
*
*/
static int ing_filter(struct sk_buff *skb, struct netdev_queue *rxq)
* on a failure.
*
* The caller must hold the rtnl_mutex.
+ *
+ * For a general description of rx_handler, see enum rx_handler_result.
*/
int netdev_rx_handler_register(struct net_device *dev,
rx_handler_func_t *rx_handler,
}
EXPORT_SYMBOL_GPL(netdev_rx_handler_unregister);
-static inline void skb_bond_set_mac_by_master(struct sk_buff *skb,
- struct net_device *master)
+static void vlan_on_bond_hook(struct sk_buff *skb)
{
- if (skb->pkt_type == PACKET_HOST) {
- u16 *dest = (u16 *) eth_hdr(skb)->h_dest;
-
- memcpy(dest, master->dev_addr, ETH_ALEN);
- }
-}
-
-/* On bonding slaves other than the currently active slave, suppress
- * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
- * ARP on active-backup slaves with arp_validate enabled.
- */
-int __skb_bond_should_drop(struct sk_buff *skb, struct net_device *master)
-{
- struct net_device *dev = skb->dev;
-
- if (master->priv_flags & IFF_MASTER_ARPMON)
- dev->last_rx = jiffies;
-
- if ((master->priv_flags & IFF_MASTER_ALB) &&
- (master->priv_flags & IFF_BRIDGE_PORT)) {
- /* Do address unmangle. The local destination address
- * will be always the one master has. Provides the right
- * functionality in a bridge.
- */
- skb_bond_set_mac_by_master(skb, master);
- }
-
- if (dev->priv_flags & IFF_SLAVE_INACTIVE) {
- if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
- skb->protocol == __cpu_to_be16(ETH_P_ARP))
- return 0;
-
- if (master->priv_flags & IFF_MASTER_ALB) {
- if (skb->pkt_type != PACKET_BROADCAST &&
- skb->pkt_type != PACKET_MULTICAST)
- return 0;
- }
- if (master->priv_flags & IFF_MASTER_8023AD &&
- skb->protocol == __cpu_to_be16(ETH_P_SLOW))
- return 0;
+ /*
+ * Make sure ARP frames received on VLAN interfaces stacked on
+ * bonding interfaces still make their way to any base bonding
+ * device that may have registered for a specific ptype.
+ */
+ if (skb->dev->priv_flags & IFF_802_1Q_VLAN &&
+ vlan_dev_real_dev(skb->dev)->priv_flags & IFF_BONDING &&
+ skb->protocol == htons(ETH_P_ARP)) {
+ struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
- return 1;
+ if (!skb2)
+ return;
+ skb2->dev = vlan_dev_real_dev(skb->dev);
+ netif_rx(skb2);
}
- return 0;
}
-EXPORT_SYMBOL(__skb_bond_should_drop);
static int __netif_receive_skb(struct sk_buff *skb)
{
struct packet_type *ptype, *pt_prev;
rx_handler_func_t *rx_handler;
struct net_device *orig_dev;
- struct net_device *master;
- struct net_device *null_or_orig;
- struct net_device *orig_or_bond;
+ struct net_device *null_or_dev;
+ bool deliver_exact = false;
int ret = NET_RX_DROP;
__be16 type;
if (!skb->skb_iif)
skb->skb_iif = skb->dev->ifindex;
-
- /*
- * bonding note: skbs received on inactive slaves should only
- * be delivered to pkt handlers that are exact matches. Also
- * the deliver_no_wcard flag will be set. If packet handlers
- * are sensitive to duplicate packets these skbs will need to
- * be dropped at the handler.
- */
- null_or_orig = NULL;
orig_dev = skb->dev;
- master = ACCESS_ONCE(orig_dev->master);
- if (skb->deliver_no_wcard)
- null_or_orig = orig_dev;
- else if (master) {
- if (skb_bond_should_drop(skb, master)) {
- skb->deliver_no_wcard = 1;
- null_or_orig = orig_dev; /* deliver only exact match */
- } else
- skb->dev = master;
- }
- __this_cpu_inc(softnet_data.processed);
skb_reset_network_header(skb);
skb_reset_transport_header(skb);
skb->mac_len = skb->network_header - skb->mac_header;
rcu_read_lock();
+another_round:
+
+ __this_cpu_inc(softnet_data.processed);
+
#ifdef CONFIG_NET_CLS_ACT
if (skb->tc_verd & TC_NCLS) {
skb->tc_verd = CLR_TC_NCLS(skb->tc_verd);
#endif
list_for_each_entry_rcu(ptype, &ptype_all, list) {
- if (ptype->dev == null_or_orig || ptype->dev == skb->dev ||
- ptype->dev == orig_dev) {
+ if (!ptype->dev || ptype->dev == skb->dev) {
if (pt_prev)
ret = deliver_skb(skb, pt_prev, orig_dev);
pt_prev = ptype;
ncls:
#endif
- /* Handle special case of bridge or macvlan */
rx_handler = rcu_dereference(skb->dev->rx_handler);
if (rx_handler) {
if (pt_prev) {
ret = deliver_skb(skb, pt_prev, orig_dev);
pt_prev = NULL;
}
- skb = rx_handler(skb);
- if (!skb)
+ switch (rx_handler(&skb)) {
+ case RX_HANDLER_CONSUMED:
goto out;
+ case RX_HANDLER_ANOTHER:
+ goto another_round;
+ case RX_HANDLER_EXACT:
+ deliver_exact = true;
+ case RX_HANDLER_PASS:
+ break;
+ default:
+ BUG();
+ }
}
if (vlan_tx_tag_present(skb)) {
goto out;
}
- /*
- * Make sure frames received on VLAN interfaces stacked on
- * bonding interfaces still make their way to any base bonding
- * device that may have registered for a specific ptype. The
- * handler may have to adjust skb->dev and orig_dev.
- */
- orig_or_bond = orig_dev;
- if ((skb->dev->priv_flags & IFF_802_1Q_VLAN) &&
- (vlan_dev_real_dev(skb->dev)->priv_flags & IFF_BONDING)) {
- orig_or_bond = vlan_dev_real_dev(skb->dev);
- }
+ vlan_on_bond_hook(skb);
+
+ /* deliver only exact match when indicated */
+ null_or_dev = deliver_exact ? skb->dev : NULL;
type = skb->protocol;
list_for_each_entry_rcu(ptype,
&ptype_base[ntohs(type) & PTYPE_HASH_MASK], list) {
- if (ptype->type == type && (ptype->dev == null_or_orig ||
- ptype->dev == skb->dev || ptype->dev == orig_dev ||
- ptype->dev == orig_or_bond)) {
+ if (ptype->type == type &&
+ (ptype->dev == null_or_dev || ptype->dev == skb->dev ||
+ ptype->dev == orig_dev)) {
if (pt_prev)
ret = deliver_skb(skb, pt_prev, orig_dev);
pt_prev = ptype;
* with netpoll's poll_napi(). Only the entity which
* obtains the lock and sees NAPI_STATE_SCHED set will
* actually make the ->poll() call. Therefore we avoid
- * accidently calling ->poll() when NAPI is not scheduled.
+ * accidentally calling ->poll() when NAPI is not scheduled.
*/
work = 0;
if (test_bit(NAPI_STATE_SCHED, &n->state)) {
void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
- struct net_device *dev = (v == SEQ_START_TOKEN) ?
- first_net_device(seq_file_net(seq)) :
- next_net_device((struct net_device *)v);
+ struct net_device *dev = v;
+
+ if (v == SEQ_START_TOKEN)
+ dev = first_net_device_rcu(seq_file_net(seq));
+ else
+ dev = next_net_device_rcu(dev);
++*pos;
- return rcu_dereference(dev);
+ return dev;
}
void dev_seq_stop(struct seq_file *seq, void *v)
/**
- * netdev_set_master - set up master/slave pair
+ * netdev_set_master - set up master pointer
* @slave: slave device
* @master: new master device
*
* Changes the master device of the slave. Pass %NULL to break the
* bonding. The caller must hold the RTNL semaphore. On a failure
* a negative errno code is returned. On success the reference counts
- * are adjusted, %RTM_NEWLINK is sent to the routing socket and the
- * function returns zero.
+ * are adjusted and the function returns zero.
*/
int netdev_set_master(struct net_device *slave, struct net_device *master)
{
synchronize_net();
dev_put(old);
}
+ return 0;
+}
+EXPORT_SYMBOL(netdev_set_master);
+
+/**
+ * netdev_set_bond_master - set up bonding master/slave pair
+ * @slave: slave device
+ * @master: new master device
+ *
+ * Changes the master device of the slave. Pass %NULL to break the
+ * bonding. The caller must hold the RTNL semaphore. On a failure
+ * a negative errno code is returned. On success %RTM_NEWLINK is sent
+ * to the routing socket and the function returns zero.
+ */
+int netdev_set_bond_master(struct net_device *slave, struct net_device *master)
+{
+ int err;
+
+ ASSERT_RTNL();
+
+ err = netdev_set_master(slave, master);
+ if (err)
+ return err;
if (master)
slave->flags |= IFF_SLAVE;
else
rtmsg_ifinfo(RTM_NEWLINK, slave, IFF_SLAVE);
return 0;
}
-EXPORT_SYMBOL(netdev_set_master);
+EXPORT_SYMBOL(netdev_set_bond_master);
static void dev_change_rx_flags(struct net_device *dev, int flags)
{
}
EXPORT_SYMBOL(dev_set_mtu);
+/**
+ * dev_set_group - Change group this device belongs to
+ * @dev: device
+ * @new_group: group this device should belong to
+ */
+void dev_set_group(struct net_device *dev, int new_group)
+{
+ dev->group = new_group;
+}
+EXPORT_SYMBOL(dev_set_group);
+
/**
* dev_set_mac_address - Change Media Access Control Address
* @dev: device
* is never reached
*/
WARN_ON(1);
- err = -EINVAL;
+ err = -ENOTTY;
break;
}
/* Set the per device memory buffer space.
* Not applicable in our case */
case SIOCSIFLINK:
- return -EINVAL;
+ return -ENOTTY;
/*
* Unknown or private ioctl.
/* Take care of Wireless Extensions */
if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)
return wext_handle_ioctl(net, &ifr, cmd, arg);
- return -EINVAL;
+ return -ENOTTY;
}
}
list_del(&single);
}
-unsigned long netdev_fix_features(unsigned long features, const char *name)
+u32 netdev_fix_features(struct net_device *dev, u32 features)
{
+ /* Fix illegal checksum combinations */
+ if ((features & NETIF_F_HW_CSUM) &&
+ (features & (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))) {
+ netdev_warn(dev, "mixed HW and IP checksum settings.\n");
+ features &= ~(NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
+ }
+
+ if ((features & NETIF_F_NO_CSUM) &&
+ (features & (NETIF_F_HW_CSUM|NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))) {
+ netdev_warn(dev, "mixed no checksumming and other settings.\n");
+ features &= ~(NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM|NETIF_F_HW_CSUM);
+ }
+
/* Fix illegal SG+CSUM combinations. */
if ((features & NETIF_F_SG) &&
!(features & NETIF_F_ALL_CSUM)) {
- if (name)
- printk(KERN_NOTICE "%s: Dropping NETIF_F_SG since no "
- "checksum feature.\n", name);
+ netdev_dbg(dev,
+ "Dropping NETIF_F_SG since no checksum feature.\n");
features &= ~NETIF_F_SG;
}
/* TSO requires that SG is present as well. */
- if ((features & NETIF_F_TSO) && !(features & NETIF_F_SG)) {
- if (name)
- printk(KERN_NOTICE "%s: Dropping NETIF_F_TSO since no "
- "SG feature.\n", name);
- features &= ~NETIF_F_TSO;
+ if ((features & NETIF_F_ALL_TSO) && !(features & NETIF_F_SG)) {
+ netdev_dbg(dev, "Dropping TSO features since no SG feature.\n");
+ features &= ~NETIF_F_ALL_TSO;
+ }
+
+ /* TSO ECN requires that TSO is present as well. */
+ if ((features & NETIF_F_ALL_TSO) == NETIF_F_TSO_ECN)
+ features &= ~NETIF_F_TSO_ECN;
+
+ /* Software GSO depends on SG. */
+ if ((features & NETIF_F_GSO) && !(features & NETIF_F_SG)) {
+ netdev_dbg(dev, "Dropping NETIF_F_GSO since no SG feature.\n");
+ features &= ~NETIF_F_GSO;
}
+ /* UFO needs SG and checksumming */
if (features & NETIF_F_UFO) {
/* maybe split UFO into V4 and V6? */
if (!((features & NETIF_F_GEN_CSUM) ||
(features & (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))
== (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))) {
- if (name)
- printk(KERN_ERR "%s: Dropping NETIF_F_UFO "
- "since no checksum offload features.\n",
- name);
+ netdev_dbg(dev,
+ "Dropping NETIF_F_UFO since no checksum offload features.\n");
features &= ~NETIF_F_UFO;
}
if (!(features & NETIF_F_SG)) {
- if (name)
- printk(KERN_ERR "%s: Dropping NETIF_F_UFO "
- "since no NETIF_F_SG feature.\n", name);
+ netdev_dbg(dev,
+ "Dropping NETIF_F_UFO since no NETIF_F_SG feature.\n");
features &= ~NETIF_F_UFO;
}
}
}
EXPORT_SYMBOL(netdev_fix_features);
+void netdev_update_features(struct net_device *dev)
+{
+ u32 features;
+ int err = 0;
+
+ features = netdev_get_wanted_features(dev);
+
+ if (dev->netdev_ops->ndo_fix_features)
+ features = dev->netdev_ops->ndo_fix_features(dev, features);
+
+ /* driver might be less strict about feature dependencies */
+ features = netdev_fix_features(dev, features);
+
+ if (dev->features == features)
+ return;
+
+ netdev_info(dev, "Features changed: 0x%08x -> 0x%08x\n",
+ dev->features, features);
+
+ if (dev->netdev_ops->ndo_set_features)
+ err = dev->netdev_ops->ndo_set_features(dev, features);
+
+ if (!err)
+ dev->features = features;
+ else if (err < 0)
+ netdev_err(dev,
+ "set_features() failed (%d); wanted 0x%08x, left 0x%08x\n",
+ err, features, dev->features);
+}
+EXPORT_SYMBOL(netdev_update_features);
+
/**
* netif_stacked_transfer_operstate - transfer operstate
* @rootdev: the root or lower level device to transfer state from
if (dev->iflink == -1)
dev->iflink = dev->ifindex;
- /* Fix illegal checksum combinations */
- if ((dev->features & NETIF_F_HW_CSUM) &&
- (dev->features & (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))) {
- printk(KERN_NOTICE "%s: mixed HW and IP checksum settings.\n",
- dev->name);
- dev->features &= ~(NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
- }
-
- if ((dev->features & NETIF_F_NO_CSUM) &&
- (dev->features & (NETIF_F_HW_CSUM|NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))) {
- printk(KERN_NOTICE "%s: mixed no checksumming and other settings.\n",
- dev->name);
- dev->features &= ~(NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM|NETIF_F_HW_CSUM);
- }
-
- dev->features = netdev_fix_features(dev->features, dev->name);
-
- /* Enable software GSO if SG is supported. */
- if (dev->features & NETIF_F_SG)
- dev->features |= NETIF_F_GSO;
+ /* Transfer changeable features to wanted_features and enable
+ * software offloads (GSO and GRO).
+ */
+ dev->hw_features |= NETIF_F_SOFT_FEATURES;
+ dev->features |= NETIF_F_SOFT_FEATURES;
+ dev->wanted_features = dev->features & dev->hw_features;
/* Enable GRO and NETIF_F_HIGHDMA for vlans by default,
* vlan_dev_init() will do the dev->features check, so these features
goto err_uninit;
dev->reg_state = NETREG_REGISTERED;
+ netdev_update_features(dev);
+
/*
* Default initial state at registry is that the
* device is present.
#endif
strcpy(dev->name, name);
+ dev->group = INIT_NETDEV_GROUP;
return dev;
free_all:
* @one to the master device with current feature set @all. Will not
* enable anything that is off in @mask. Returns the new feature set.
*/
-unsigned long netdev_increment_features(unsigned long all, unsigned long one,
- unsigned long mask)
+u32 netdev_increment_features(u32 all, u32 one, u32 mask)
{
/* If device needs checksumming, downgrade to it. */
if (all & NETIF_F_NO_CSUM && !(one & NETIF_F_NO_CSUM))
if (dev->rtnl_link_ops)
continue;
- /* Push remaing network devices to init_net */
+ /* Push remaining network devices to init_net */
snprintf(fb_name, IFNAMSIZ, "dev%d", dev->ifindex);
err = dev_change_net_namespace(dev, &init_net, fb_name);
if (err) {
git.openpandora.org / pandora-kernel.git / blobdiff