sched/fair: add tunable to force selection at cpu granularity

[firefly-linux-kernel-4.4.55.git] / include / linux / netdevice.h

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 3143c847bddbca47bed1a324bf85e58283e966a5..04c068e55353297fafc059e3dc3abcf5c0b1eab3 100644 (file)
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -265,6 +265,7 @@ 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
@@ -1398,8 +1399,7 @@ 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
@@ -2493,6 +2493,24 @@ 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)