[PATCH net-next V5 5/9] tun: export skb_array

Jason Wang
2017-05-17T04:15:36Z

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

Signed-off-by: Jason Wang <jasowang@redhat.com>
---
drivers/net/tun.c | 13 +++++++++++++
include/linux/if_tun.h | 5 +++++
2 files changed, 18 insertions(+)

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index bbd707b..3cbfc5c 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -2626,6 +2626,19 @@ struct socket *tun_get_socket(struct file *file)
}
EXPORT_SYMBOL_GPL(tun_get_socket);

+struct skb_array *tun_get_skb_array(struct file *file)
+{
+ struct tun_file *tfile;
+
+ if (file->f_op != &tun_fops)
+ return ERR_PTR(-EINVAL);
+ tfile = file->private_data;
+ if (!tfile)
+ return ERR_PTR(-EBADFD);
+ return &tfile->tx_array;
+}
+EXPORT_SYMBOL_GPL(tun_get_skb_array);
+
module_init(tun_init);
module_exit(tun_cleanup);
MODULE_DESCRIPTION(DRV_DESCRIPTION);
diff --git a/include/linux/if_tun.h b/include/linux/if_tun.h
index ed6da2e..bf9bdf4 100644
--- a/include/linux/if_tun.h
+++ b/include/linux/if_tun.h
@@ -19,6 +19,7 @@

#if defined(CONFIG_TUN) || defined(CONFIG_TUN_MODULE)
struct socket *tun_get_socket(struct file *);
+struct skb_array *tun_get_skb_array(struct file *file);
#else
#include <linux/err.h>
#include <linux/errno.h>
@@ -28,5 +29,9 @@ static inline struct socket *tun_get_socket(struct file *f)
{
return ERR_PTR(-EINVAL);
}
+static inline struct skb_array *tun_get_skb_array(struct file *f)
+{
+ return ERR_PTR(-EINVAL);
+}
#endif /* CONFIG_TUN */
#endif /* __IF_TUN_H */
--
2.7.4