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Merge branch 'macsec-gro'

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Paolo Abeni says:

====================
macsec: enable s/w offloads

This patches leverage gro_cells infrastructure to enable both GRO and RPS
on macsec devices.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2016-07-22 00:50:49 -04:00
commit d95a93a9b7
2 changed files with 30 additions and 13 deletions
drivers/net
macsec.c
include/net
gro_cells.h

32
drivers/net/macsec.c
View File

@ -18,6 +18,7 @@
#include <linux/rtnetlink.h>
#include <net/genetlink.h>
#include <net/sock.h>
#include <net/gro_cells.h>
#include <uapi/linux/if_macsec.h>
@ -268,6 +269,7 @@ struct macsec_dev {
struct net_device *real_dev;
struct pcpu_secy_stats __percpu *stats;
struct list_head secys;
struct gro_cells gro_cells;
};
/**
@ -879,7 +881,7 @@ static void macsec_decrypt_done(struct crypto_async_request *base, int err)
macsec_reset_skb(skb, macsec->secy.netdev);
len = skb->len;
ret = netif_rx(skb);
ret = gro_cells_receive(&macsec->gro_cells, skb);
if (ret == NET_RX_SUCCESS)
count_rx(dev, len);
else
@ -1052,6 +1054,7 @@ static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
struct pcpu_rx_sc_stats *rxsc_stats;
struct pcpu_secy_stats *secy_stats;
bool pulled_sci;
int ret;
if (skb_headroom(skb) < ETH_HLEN)
goto drop_direct;
@ -1193,12 +1196,17 @@ deliver:
if (rx_sa)
macsec_rxsa_put(rx_sa);
count_rx(dev, skb->len);
ret = gro_cells_receive(&macsec->gro_cells, skb);
if (ret == NET_RX_SUCCESS)
count_rx(dev, skb->len);
else
macsec->secy.netdev->stats.rx_dropped++;
rcu_read_unlock();
*pskb = skb;
return RX_HANDLER_ANOTHER;
*pskb = NULL;
return RX_HANDLER_CONSUMED;
drop:
macsec_rxsa_put(rx_sa);
@ -1218,7 +1226,6 @@ nosci:
list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
struct sk_buff *nskb;
int ret;
secy_stats = this_cpu_ptr(macsec->stats);
@ -2675,11 +2682,18 @@ static int macsec_dev_init(struct net_device *dev)
{
struct macsec_dev *macsec = macsec_priv(dev);
struct net_device *real_dev = macsec->real_dev;
int err;
dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
if (!dev->tstats)
return -ENOMEM;
err = gro_cells_init(&macsec->gro_cells, dev);
if (err) {
free_percpu(dev->tstats);
return err;
}
dev->features = real_dev->features & MACSEC_FEATURES;
dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
@ -2698,6 +2712,9 @@ static int macsec_dev_init(struct net_device *dev)
static void macsec_dev_uninit(struct net_device *dev)
{
struct macsec_dev *macsec = macsec_priv(dev);
gro_cells_destroy(&macsec->gro_cells);
free_percpu(dev->tstats);
}
@ -2707,8 +2724,9 @@ static netdev_features_t macsec_fix_features(struct net_device *dev,
struct macsec_dev *macsec = macsec_priv(dev);
struct net_device *real_dev = macsec->real_dev;
features &= real_dev->features & MACSEC_FEATURES;
features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
features &= (real_dev->features & MACSEC_FEATURES) |
NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES;
features |= NETIF_F_LLTX;
return features;
}

11
include/net/gro_cells.h
View File

@ -14,27 +14,26 @@ struct gro_cells {
struct gro_cell __percpu *cells;
};
static inline void gro_cells_receive(struct gro_cells *gcells, struct sk_buff *skb)
static inline int gro_cells_receive(struct gro_cells *gcells, struct sk_buff *skb)
{
struct gro_cell *cell;
struct net_device *dev = skb->dev;
if (!gcells->cells || skb_cloned(skb) || !(dev->features & NETIF_F_GRO)) {
netif_rx(skb);
return;
}
if (!gcells->cells || skb_cloned(skb) || !(dev->features & NETIF_F_GRO))
return netif_rx(skb);
cell = this_cpu_ptr(gcells->cells);
if (skb_queue_len(&cell->napi_skbs) > netdev_max_backlog) {
atomic_long_inc(&dev->rx_dropped);
kfree_skb(skb);
return;
return NET_RX_DROP;
}
__skb_queue_tail(&cell->napi_skbs, skb);
if (skb_queue_len(&cell->napi_skbs) == 1)
napi_schedule(&cell->napi);
return NET_RX_SUCCESS;
}
/* called under BH context */