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Diffstat (limited to 'net/core/dev.c')
-rw-r--r--net/core/dev.c87
1 files changed, 72 insertions, 15 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index 1461c2d9dec8..7a61690d3137 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -151,6 +151,7 @@
#include <linux/prandom.h>
#include <linux/once_lite.h>
+#include "dev.h"
#include "net-sysfs.h"
@@ -701,6 +702,10 @@ int dev_fill_forward_path(const struct net_device *dev, const u8 *daddr,
if (WARN_ON_ONCE(last_dev == ctx.dev))
return -1;
}
+
+ if (!ctx.dev)
+ return ret;
+
path = dev_fwd_path(stack);
if (!path)
return -1;
@@ -3920,6 +3925,25 @@ sch_handle_egress(struct sk_buff *skb, int *ret, struct net_device *dev)
return skb;
}
+
+static struct netdev_queue *
+netdev_tx_queue_mapping(struct net_device *dev, struct sk_buff *skb)
+{
+ int qm = skb_get_queue_mapping(skb);
+
+ return netdev_get_tx_queue(dev, netdev_cap_txqueue(dev, qm));
+}
+
+static bool netdev_xmit_txqueue_skipped(void)
+{
+ return __this_cpu_read(softnet_data.xmit.skip_txqueue);
+}
+
+void netdev_xmit_skip_txqueue(bool skip)
+{
+ __this_cpu_write(softnet_data.xmit.skip_txqueue, skip);
+}
+EXPORT_SYMBOL_GPL(netdev_xmit_skip_txqueue);
#endif /* CONFIG_NET_EGRESS */
#ifdef CONFIG_XPS
@@ -4090,7 +4114,7 @@ struct netdev_queue *netdev_core_pick_tx(struct net_device *dev,
static int __dev_queue_xmit(struct sk_buff *skb, struct net_device *sb_dev)
{
struct net_device *dev = skb->dev;
- struct netdev_queue *txq;
+ struct netdev_queue *txq = NULL;
struct Qdisc *q;
int rc = -ENOMEM;
bool again = false;
@@ -4118,11 +4142,17 @@ static int __dev_queue_xmit(struct sk_buff *skb, struct net_device *sb_dev)
if (!skb)
goto out;
}
+
+ netdev_xmit_skip_txqueue(false);
+
nf_skip_egress(skb, true);
skb = sch_handle_egress(skb, &rc, dev);
if (!skb)
goto out;
nf_skip_egress(skb, false);
+
+ if (netdev_xmit_txqueue_skipped())
+ txq = netdev_tx_queue_mapping(dev, skb);
}
#endif
/* If device/qdisc don't need skb->dst, release it right now while
@@ -4133,7 +4163,9 @@ static int __dev_queue_xmit(struct sk_buff *skb, struct net_device *sb_dev)
else
skb_dst_force(skb);
- txq = netdev_core_pick_tx(dev, skb, sb_dev);
+ if (!txq)
+ txq = netdev_core_pick_tx(dev, skb, sb_dev);
+
q = rcu_dereference_bh(txq->qdisc);
trace_net_dev_queue(skb);
@@ -4513,6 +4545,12 @@ static void rps_trigger_softirq(void *data)
#endif /* CONFIG_RPS */
+/* Called from hardirq (IPI) context */
+static void trigger_rx_softirq(void *data __always_unused)
+{
+ __raise_softirq_irqoff(NET_RX_SOFTIRQ);
+}
+
/*
* Check if this softnet_data structure is another cpu one
* If yes, queue it to our IPI list and return 1
@@ -5370,13 +5408,11 @@ check_vlan_id:
*ppt_prev = pt_prev;
} else {
drop:
- if (!deliver_exact) {
+ if (!deliver_exact)
dev_core_stats_rx_dropped_inc(skb->dev);
- kfree_skb_reason(skb, SKB_DROP_REASON_PTYPE_ABSENT);
- } else {
+ else
dev_core_stats_rx_nohandler_inc(skb->dev);
- kfree_skb(skb);
- }
+ kfree_skb_reason(skb, SKB_DROP_REASON_UNHANDLED_PROTO);
/* Jamal, now you will not able to escape explaining
* me how you were going to use this. :-)
*/
@@ -6541,6 +6577,28 @@ static int napi_threaded_poll(void *data)
return 0;
}
+static void skb_defer_free_flush(struct softnet_data *sd)
+{
+ struct sk_buff *skb, *next;
+ unsigned long flags;
+
+ /* Paired with WRITE_ONCE() in skb_attempt_defer_free() */
+ if (!READ_ONCE(sd->defer_list))
+ return;
+
+ spin_lock_irqsave(&sd->defer_lock, flags);
+ skb = sd->defer_list;
+ sd->defer_list = NULL;
+ sd->defer_count = 0;
+ spin_unlock_irqrestore(&sd->defer_lock, flags);
+
+ while (skb != NULL) {
+ next = skb->next;
+ __kfree_skb(skb);
+ skb = next;
+ }
+}
+
static __latent_entropy void net_rx_action(struct softirq_action *h)
{
struct softnet_data *sd = this_cpu_ptr(&softnet_data);
@@ -6559,7 +6617,7 @@ static __latent_entropy void net_rx_action(struct softirq_action *h)
if (list_empty(&list)) {
if (!sd_has_rps_ipi_waiting(sd) && list_empty(&repoll))
- return;
+ goto end;
break;
}
@@ -6586,6 +6644,8 @@ static __latent_entropy void net_rx_action(struct softirq_action *h)
__raise_softirq_irqoff(NET_RX_SOFTIRQ);
net_rps_action_and_irq_enable(sd);
+end:
+ skb_defer_free_flush(sd);
}
struct netdev_adjacent {
@@ -8641,7 +8701,6 @@ void dev_set_group(struct net_device *dev, int new_group)
{
dev->group = new_group;
}
-EXPORT_SYMBOL(dev_set_group);
/**
* dev_pre_changeaddr_notify - Call NETDEV_PRE_CHANGEADDR.
@@ -8756,7 +8815,6 @@ int dev_change_carrier(struct net_device *dev, bool new_carrier)
return -ENODEV;
return ops->ndo_change_carrier(dev, new_carrier);
}
-EXPORT_SYMBOL(dev_change_carrier);
/**
* dev_get_phys_port_id - Get device physical port ID
@@ -8774,7 +8832,6 @@ int dev_get_phys_port_id(struct net_device *dev,
return -EOPNOTSUPP;
return ops->ndo_get_phys_port_id(dev, ppid);
}
-EXPORT_SYMBOL(dev_get_phys_port_id);
/**
* dev_get_phys_port_name - Get device physical port name
@@ -8797,7 +8854,6 @@ int dev_get_phys_port_name(struct net_device *dev,
}
return devlink_compat_phys_port_name_get(dev, name, len);
}
-EXPORT_SYMBOL(dev_get_phys_port_name);
/**
* dev_get_port_parent_id - Get the device's port parent identifier
@@ -8879,7 +8935,6 @@ int dev_change_proto_down(struct net_device *dev, bool proto_down)
dev->proto_down = proto_down;
return 0;
}
-EXPORT_SYMBOL(dev_change_proto_down);
/**
* dev_change_proto_down_reason - proto down reason
@@ -8904,7 +8959,6 @@ void dev_change_proto_down_reason(struct net_device *dev, unsigned long mask,
}
}
}
-EXPORT_SYMBOL(dev_change_proto_down_reason);
struct bpf_xdp_link {
struct bpf_link link;
@@ -9431,7 +9485,7 @@ static int dev_new_index(struct net *net)
}
/* Delayed registration/unregisteration */
-static LIST_HEAD(net_todo_list);
+LIST_HEAD(net_todo_list);
DECLARE_WAIT_QUEUE_HEAD(netdev_unregistering_wq);
static void net_set_todo(struct net_device *dev)
@@ -10355,6 +10409,7 @@ struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
storage->rx_dropped += READ_ONCE(core_stats->rx_dropped);
storage->tx_dropped += READ_ONCE(core_stats->tx_dropped);
storage->rx_nohandler += READ_ONCE(core_stats->rx_nohandler);
+ storage->rx_otherhost_dropped += READ_ONCE(core_stats->rx_otherhost_dropped);
}
}
return storage;
@@ -11297,6 +11352,8 @@ static int __init net_dev_init(void)
INIT_CSD(&sd->csd, rps_trigger_softirq, sd);
sd->cpu = i;
#endif
+ INIT_CSD(&sd->defer_csd, trigger_rx_softirq, NULL);
+ spin_lock_init(&sd->defer_lock);
init_gro_hash(&sd->backlog);
sd->backlog.poll = process_backlog;
generated by cgit v1.2.3-70-g09d2 (git 2.48.1) at 2025-04-01 19:26:54 +0000