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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-04-23 04:02:05 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-04-23 04:02:05 -0300
commit394569928e2f17dff4ae367ac700048138e318c7 (patch)
treec789d2a2d107284e78f6c6558267b6984f518581 /include/linux/netdevice.h
parentbdcfd44fb5b5fb8fd660e7f93f1095c507481024 (diff)
Linux-libre 4.5.2-gnupck-4.5.2-gnu
Diffstat (limited to 'include/linux/netdevice.h')
-rw-r--r--include/linux/netdevice.h22
1 files changed, 20 insertions, 2 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 5440b7b70..6d1d8f4f7 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -267,6 +267,7 @@ struct header_ops {
void (*cache_update)(struct hh_cache *hh,
const struct net_device *dev,
const unsigned char *haddr);
+ bool (*validate)(const char *ll_header, unsigned int len);
};
/* These flag bits are private to the generic network queueing
@@ -1420,8 +1421,7 @@ enum netdev_priv_flags {
* @dma: DMA channel
* @mtu: Interface MTU value
* @type: Interface hardware type
- * @hard_header_len: Hardware header length, which means that this is the
- * minimum size of a packet.
+ * @hard_header_len: Maximum hardware header length.
*
* @needed_headroom: Extra headroom the hardware may need, but not in all
* cases can this be guaranteed
@@ -2627,6 +2627,24 @@ static inline int dev_parse_header(const struct sk_buff *skb,
return dev->header_ops->parse(skb, haddr);
}
+/* ll_header must have at least hard_header_len allocated */
+static inline bool dev_validate_header(const struct net_device *dev,
+ char *ll_header, int len)
+{
+ if (likely(len >= dev->hard_header_len))
+ return true;
+
+ if (capable(CAP_SYS_RAWIO)) {
+ memset(ll_header + len, 0, dev->hard_header_len - len);
+ return true;
+ }
+
+ if (dev->header_ops && dev->header_ops->validate)
+ return dev->header_ops->validate(ll_header, len);
+
+ return false;
+}
+
typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
int register_gifconf(unsigned int family, gifconf_func_t *gifconf);
static inline int unregister_gifconf(unsigned int family)