[PATCH net-next V5 6/9] tap: export skb_array

Jason Wang
2017-05-17T04:15:59Z

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>
---
drivers/net/tap.c | 13 +++++++++++++
include/linux/if_tap.h | 5 +++++
2 files changed, 18 insertions(+)

diff --git a/drivers/net/tap.c b/drivers/net/tap.c
index 4d4173d..abdaf86 100644
--- 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 3482c3c..4837157 100644
--- 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>
--
2.7.4