[RFC][b/azure][PATCH 3/8] azure XDP generic fixes - option 1
Ioanna Alifieraki
ioanna-maria.alifieraki at canonical.com
Thu Jun 13 19:26:25 UTC 2019
From: Edward Cree <ecree at solarflare.com>
BugLink: https://bugs.launchpad.net/bugs/1831254
Just calls netif_receive_skb() in a loop.
Signed-off-by: Edward Cree <ecree at solarflare.com>
Signed-off-by: David S. Miller <davem at davemloft.net>
(cherry picked from commit f6ad8c1bcdf014272d08c55b9469536952a0a771)
Signed-off-by: Ioanna Alifieraki <ioanna-maria.alifieraki at canonical.com>
---
include/linux/netdevice.h | 1 +
net/core/dev.c | 19 +++++++++++++++++++
2 files changed, 20 insertions(+)
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 */
--
2.17.1
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