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[RFC,b/azure,3/8] azure XDP generic fixes - option 1

Message ID 20190613192630.31244-4-ioanna-maria.alifieraki@canonical.com
State New
Headers show
Series azure XDP generic fixes - option 1 | expand

Commit Message

Ioanna Alifieraki June 13, 2019, 7:26 p.m. UTC 
From: Edward Cree <ecree@solarflare.com>

BugLink: https://bugs.launchpad.net/bugs/1831254

Just calls netif_receive_skb() in a loop.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit f6ad8c1bcdf014272d08c55b9469536952a0a771)
Signed-off-by: Ioanna Alifieraki <ioanna-maria.alifieraki@canonical.com>
---
 include/linux/netdevice.h |  1 +
 net/core/dev.c            | 19 +++++++++++++++++++
 2 files changed, 20 insertions(+)
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Patch

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 3045a5cee0d8..ae8797f54850 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -3391,6 +3391,7 @@  int netif_rx(struct sk_buff *skb);
 int netif_rx_ni(struct sk_buff *skb);
 int netif_receive_skb(struct sk_buff *skb);
 int netif_receive_skb_core(struct sk_buff *skb);
+void netif_receive_skb_list(struct list_head *head);
 gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb);
 void napi_gro_flush(struct napi_struct *napi, bool flush_old);
 struct sk_buff *napi_get_frags(struct napi_struct *napi);
diff --git a/net/core/dev.c b/net/core/dev.c
index bf669e77f9f3..4977c86b79ad 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -4814,6 +4814,25 @@  int netif_receive_skb(struct sk_buff *skb)
 }
 EXPORT_SYMBOL(netif_receive_skb);
 
+/**
+ *	netif_receive_skb_list - process many receive buffers from network
+ *	@head: list of skbs to process.
+ *
+ *	For now, just calls netif_receive_skb() in a loop, ignoring the
+ *	return value.
+ *
+ *	This function may only be called from softirq context and interrupts
+ *	should be enabled.
+ */
+void netif_receive_skb_list(struct list_head *head)
+{
+	struct sk_buff *skb, *next;
+
+	list_for_each_entry_safe(skb, next, head, list)
+		netif_receive_skb(skb);
+}
+EXPORT_SYMBOL(netif_receive_skb_list);
+
 DEFINE_PER_CPU(struct work_struct, flush_works);
 
 /* Network device is going away, flush any packets still pending */