tap: export skb_array

This patch exports skb_array through tap_get_skb_array(). Caller can
then manipulate skb array directly.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/tap.c b/drivers/net/tap.c
index 4d4173d25dd0afb01f19395a5938f2d8bea24ba7..abdaf867774d2562aca8b388a8fa160b6fa2461d 100644 (file)
--- a/drivers/net/tap.c
+++ b/drivers/net/tap.c
@@ -1193,6 +1193,19 @@ struct socket *tap_get_socket(struct file *file)
 }
 EXPORT_SYMBOL_GPL(tap_get_socket);
 
+struct skb_array *tap_get_skb_array(struct file *file)
+{
+       struct tap_queue *q;
+
+       if (file->f_op != &tap_fops)
+               return ERR_PTR(-EINVAL);
+       q = file->private_data;
+       if (!q)
+               return ERR_PTR(-EBADFD);
+       return &q->skb_array;
+}
+EXPORT_SYMBOL_GPL(tap_get_skb_array);
+
 int tap_queue_resize(struct tap_dev *tap)
 {
        struct net_device *dev = tap->dev;

diff --git a/include/linux/if_tap.h b/include/linux/if_tap.h
index 3482c3c2037d8c35a3825bc1b16ff573c9d60905..4837157da0dc04c4cc2c1a7c02da71e41c787d63 100644 (file)
--- a/include/linux/if_tap.h
+++ b/include/linux/if_tap.h
@@ -3,6 +3,7 @@
 
 #if IS_ENABLED(CONFIG_TAP)
 struct socket *tap_get_socket(struct file *);
+struct skb_array *tap_get_skb_array(struct file *file);
 #else
 #include <linux/err.h>
 #include <linux/errno.h>
@@ -12,6 +13,10 @@ static inline struct socket *tap_get_socket(struct file *f)
 {
        return ERR_PTR(-EINVAL);
 }
+static inline struct skb_array *tap_get_skb_array(struct file *f)
+{
+       return ERR_PTR(-EINVAL);
+}
 #endif /* CONFIG_TAP */
 
 #include <net/sock.h>