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netdevice: add queue selection fallback handler for ndo_select_queue 

Add a new argument for ndo_select_queue() callback that passes a
fallback handler. This gets invoked through netdev_pick_tx();
fallback handler is currently __netdev_pick_tx() as most drivers
invoke this function within their customized implementation in
case for skbs that don't need any special handling. This fallback
handler can then be replaced on other call-sites with different
queue selection methods (e.g. in packet sockets, pktgen etc).

This also has the nice side-effect that __netdev_pick_tx() is
then only invoked from netdev_pick_tx() and export of that
function to modules can be undone.

Suggested-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Borkmann 2014-02-16 15:55:20 +01:00 committed by David S. Miller
parent c321f7d7c8
commit 99932d4fc0
17 changed files with 31 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/bonding/bond_main.c
View File

@ -3707,7 +3707,7 @@ static inline int bond_slave_override(struct bonding *bond,
static u16 bond_select_queue(struct net_device *dev, struct sk_buff *skb,
void *accel_priv)
void *accel_priv, select_queue_fallback_t fallback)
{
/*
* This helper function exists to help dev_pick_tx get the correct

4
drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c
View File

@ -1873,7 +1873,7 @@ void bnx2x_netif_stop(struct bnx2x *bp, int disable_hw)
}
u16 bnx2x_select_queue(struct net_device *dev, struct sk_buff *skb,
void *accel_priv)
void *accel_priv, select_queue_fallback_t fallback)
{
struct bnx2x *bp = netdev_priv(dev);
@ -1895,7 +1895,7 @@ u16 bnx2x_select_queue(struct net_device *dev, struct sk_buff *skb,
}
/* select a non-FCoE queue */
return __netdev_pick_tx(dev, skb) % BNX2X_NUM_ETH_QUEUES(bp);
return fallback(dev, skb) % BNX2X_NUM_ETH_QUEUES(bp);
}
void bnx2x_set_num_queues(struct bnx2x *bp)

2
drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.h
View File

@ -496,7 +496,7 @@ int bnx2x_set_vf_vlan(struct net_device *netdev, int vf, u16 vlan, u8 qos);
/* select_queue callback */
u16 bnx2x_select_queue(struct net_device *dev, struct sk_buff *skb,
void *accel_priv);
void *accel_priv, select_queue_fallback_t fallback);
static inline void bnx2x_update_rx_prod(struct bnx2x *bp,
struct bnx2x_fastpath *fp,

6
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
View File

@ -6881,7 +6881,7 @@ static inline int ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 size)
}
static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb,
void *accel_priv)
void *accel_priv, select_queue_fallback_t fallback)
{
struct ixgbe_fwd_adapter *fwd_adapter = accel_priv;
#ifdef IXGBE_FCOE
@ -6907,7 +6907,7 @@ static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb,
if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
break;
default:
return __netdev_pick_tx(dev, skb);
return fallback(dev, skb);
}
f = &adapter->ring_feature[RING_F_FCOE];
@ -6920,7 +6920,7 @@ static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb,
return txq + f->offset;
#else
return __netdev_pick_tx(dev, skb);
return fallback(dev, skb);
#endif
}

2
drivers/net/ethernet/lantiq_etop.c
View File

@ -619,7 +619,7 @@ ltq_etop_set_multicast_list(struct net_device *dev)
static u16
ltq_etop_select_queue(struct net_device *dev, struct sk_buff *skb,
void *accel_priv)
void *accel_priv, select_queue_fallback_t fallback)
{
/* we are currently only using the first queue */
return 0;

4
drivers/net/ethernet/mellanox/mlx4/en_tx.c
View File

@ -629,7 +629,7 @@ static void build_inline_wqe(struct mlx4_en_tx_desc *tx_desc, struct sk_buff *sk
}
u16 mlx4_en_select_queue(struct net_device *dev, struct sk_buff *skb,
void *accel_priv)
void *accel_priv, select_queue_fallback_t fallback)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
u16 rings_p_up = priv->num_tx_rings_p_up;
@ -641,7 +641,7 @@ u16 mlx4_en_select_queue(struct net_device *dev, struct sk_buff *skb,
if (vlan_tx_tag_present(skb))
up = vlan_tx_tag_get(skb) >> VLAN_PRIO_SHIFT;
return __netdev_pick_tx(dev, skb) % rings_p_up + up * rings_p_up;
return fallback(dev, skb) % rings_p_up + up * rings_p_up;
}
static void mlx4_bf_copy(void __iomem *dst, unsigned long *src, unsigned bytecnt)

2
drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
View File

@ -723,7 +723,7 @@ int mlx4_en_arm_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq);
void mlx4_en_tx_irq(struct mlx4_cq *mcq);
u16 mlx4_en_select_queue(struct net_device *dev, struct sk_buff *skb,
void *accel_priv);
void *accel_priv, select_queue_fallback_t fallback);
netdev_tx_t mlx4_en_xmit(struct sk_buff *skb, struct net_device *dev);
int mlx4_en_create_tx_ring(struct mlx4_en_priv *priv,

2
drivers/net/ethernet/tile/tilegx.c
View File

@ -2071,7 +2071,7 @@ static int tile_net_tx(struct sk_buff *skb, struct net_device *dev)
/* Return subqueue id on this core (one per core). */
static u16 tile_net_select_queue(struct net_device *dev, struct sk_buff *skb,
void *accel_priv)
void *accel_priv, select_queue_fallback_t fallback)
{
return smp_processor_id();
}

2
drivers/net/team/team.c
View File

@ -1648,7 +1648,7 @@ static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
}
static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
void *accel_priv)
void *accel_priv, select_queue_fallback_t fallback)
{
/*
* This helper function exists to help dev_pick_tx get the correct

2
drivers/net/tun.c
View File

@ -366,7 +366,7 @@ static inline void tun_flow_save_rps_rxhash(struct tun_flow_entry *e, u32 hash)
* hope the rxq no. may help here.
*/
static u16 tun_select_queue(struct net_device *dev, struct sk_buff *skb,
void *accel_priv)
void *accel_priv, select_queue_fallback_t fallback)
{
struct tun_struct *tun = netdev_priv(dev);
struct tun_flow_entry *e;

2
drivers/net/wireless/mwifiex/main.c
View File

@ -748,7 +748,7 @@ static struct net_device_stats *mwifiex_get_stats(struct net_device *dev)
static u16
mwifiex_netdev_select_wmm_queue(struct net_device *dev, struct sk_buff *skb,
void *accel_priv)
void *accel_priv, select_queue_fallback_t fallback)
{
skb->priority = cfg80211_classify8021d(skb, NULL);
return mwifiex_1d_to_wmm_queue[skb->priority];

2
drivers/staging/bcm/Bcmnet.c
View File

@ -40,7 +40,7 @@ static INT bcm_close(struct net_device *dev)
}
static u16 bcm_select_queue(struct net_device *dev, struct sk_buff *skb,
void *accel_priv)
void *accel_priv, select_queue_fallback_t fallback)
{
return ClassifyPacket(netdev_priv(dev), skb);
}

2
drivers/staging/netlogic/xlr_net.c
View File

@ -307,7 +307,7 @@ static netdev_tx_t xlr_net_start_xmit(struct sk_buff *skb,
}
static u16 xlr_net_select_queue(struct net_device *ndev, struct sk_buff *skb,
void *accel_priv)
void *accel_priv, select_queue_fallback_t fallback)
{
return (u16)smp_processor_id();
}

2
drivers/staging/rtl8188eu/os_dep/os_intfs.c
View File

@ -653,7 +653,7 @@ static unsigned int rtw_classify8021d(struct sk_buff *skb)
}
static u16 rtw_select_queue(struct net_device *dev, struct sk_buff *skb,
void *accel_priv)
void *accel_priv, select_queue_fallback_t fallback)
{
struct adapter *padapter = rtw_netdev_priv(dev);
struct mlme_priv *pmlmepriv = &padapter->mlmepriv;

9
include/linux/netdevice.h
View File

@ -752,6 +752,9 @@ struct netdev_phys_port_id {
unsigned char id_len;
};
typedef u16 (*select_queue_fallback_t)(struct net_device *dev,
struct sk_buff *skb);
/*
* This structure defines the management hooks for network devices.
* The following hooks can be defined; unless noted otherwise, they are
@ -783,7 +786,7 @@ struct netdev_phys_port_id {
* Required can not be NULL.
*
* u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
* void *accel_priv);
* void *accel_priv, select_queue_fallback_t fallback);
* Called to decide which queue to when device supports multiple
* transmit queues.
*
@ -1005,7 +1008,8 @@ struct net_device_ops {
struct net_device *dev);
u16 (*ndo_select_queue)(struct net_device *dev,
struct sk_buff *skb,
void *accel_priv);
void *accel_priv,
select_queue_fallback_t fallback);
void (*ndo_change_rx_flags)(struct net_device *dev,
int flags);
void (*ndo_set_rx_mode)(struct net_device *dev);
@ -1551,7 +1555,6 @@ static inline void netdev_for_each_tx_queue(struct net_device *dev,
struct netdev_queue *netdev_pick_tx(struct net_device *dev,
struct sk_buff *skb,
void *accel_priv);
u16 __netdev_pick_tx(struct net_device *dev, struct sk_buff *skb);
/*
* Net namespace inlines

7
net/core/flow_dissector.c
View File

@ -372,7 +372,7 @@ static inline int get_xps_queue(struct net_device *dev, struct sk_buff *skb)
#endif
}
u16 __netdev_pick_tx(struct net_device *dev, struct sk_buff *skb)
static u16 __netdev_pick_tx(struct net_device *dev, struct sk_buff *skb)
{
struct sock *sk = skb->sk;
int queue_index = sk_tx_queue_get(sk);
@ -392,7 +392,6 @@ u16 __netdev_pick_tx(struct net_device *dev, struct sk_buff *skb)
return queue_index;
}
EXPORT_SYMBOL(__netdev_pick_tx);
struct netdev_queue *netdev_pick_tx(struct net_device *dev,
struct sk_buff *skb,
@ -403,8 +402,8 @@ struct netdev_queue *netdev_pick_tx(struct net_device *dev,
if (dev->real_num_tx_queues != 1) {
const struct net_device_ops *ops = dev->netdev_ops;
if (ops->ndo_select_queue)
queue_index = ops->ndo_select_queue(dev, skb,
accel_priv);
queue_index = ops->ndo_select_queue(dev, skb, accel_priv,
__netdev_pick_tx);
else
queue_index = __netdev_pick_tx(dev, skb);

6
net/mac80211/iface.c
View File

@ -1057,7 +1057,8 @@ static void ieee80211_uninit(struct net_device *dev)
static u16 ieee80211_netdev_select_queue(struct net_device *dev,
struct sk_buff *skb,
void *accel_priv)
void *accel_priv,
select_queue_fallback_t fallback)
{
return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
}
@ -1075,7 +1076,8 @@ static const struct net_device_ops ieee80211_dataif_ops = {
static u16 ieee80211_monitor_select_queue(struct net_device *dev,
struct sk_buff *skb,
void *accel_priv)
void *accel_priv,
select_queue_fallback_t fallback)
{
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
struct ieee80211_local *local = sdata->local;