netlink: Improve returned error codes

[linux-2.6-omap-h63xx.git] / include / linux / netdevice.h

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index ee81906b5164deccb24ed396f95697b4a79638b2..f27fd2009334922325866c69d2abe42bb45bfd67 100644 (file)
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -93,14 +93,16 @@ struct wireless_dev;
  *     used.
  */
  
-#if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR)
-#define LL_MAX_HEADER  32
+#if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
+# if defined(CONFIG_MAC80211_MESH)
+#  define LL_MAX_HEADER 128
+# else
+#  define LL_MAX_HEADER 96
+# endif
+#elif defined(CONFIG_TR)
+# define LL_MAX_HEADER 48
 #else
-#if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
-#define LL_MAX_HEADER  96
-#else
-#define LL_MAX_HEADER  48
-#endif
+# define LL_MAX_HEADER 32
 #endif
 
 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
@@ -244,11 +246,16 @@ struct hh_cache
  *
  * We could use other alignment values, but we must maintain the
  * relationship HH alignment <= LL alignment.
+ *
+ * LL_ALLOCATED_SPACE also takes into account the tailroom the device
+ * may need.
  */
 #define LL_RESERVED_SPACE(dev) \
-       (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
+       ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
-       ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
+       ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
+#define LL_ALLOCATED_SPACE(dev) \
+       ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
 
 struct header_ops {
        int     (*create) (struct sk_buff *skb, struct net_device *dev,
@@ -567,6 +574,13 @@ struct net_device
        unsigned short          type;   /* interface hardware type      */
        unsigned short          hard_header_len;        /* hardware hdr length  */
 
+       /* extra head- and tailroom the hardware may need, but not in all cases
+        * can this be guaranteed, especially tailroom. Some cases also use
+        * LL_MAX_HEADER instead to allocate the skb.
+        */
+       unsigned short          needed_headroom;
+       unsigned short          needed_tailroom;
+
        struct net_device       *master; /* Pointer to master device of a group,
                                          * which this device is member of.
                                          */
@@ -710,8 +724,13 @@ struct net_device
        void                    (*poll_controller)(struct net_device *dev);
 #endif
 
+#ifdef CONFIG_NET_NS
        /* Network namespace this network device is inside */
        struct net              *nd_net;
+#endif
+
+       /* mid-layer private */
+       void                    *ml_priv;
 
        /* bridge stuff */
        struct net_bridge_port  *br_port;
@@ -726,6 +745,13 @@ struct net_device
        /* rtnetlink link ops */
        const struct rtnl_link_ops *rtnl_link_ops;
 
+       /* VLAN feature mask */
+       unsigned long vlan_features;
+
+       /* for setting kernel sock attribute on TCP connection setup */
+#define GSO_MAX_SIZE           65536
+       unsigned int            gso_max_size;
+
        /* The TX queue control structures */
        unsigned int                    egress_subqueue_count;
        struct net_device_subqueue      egress_subqueue[1];
@@ -735,6 +761,28 @@ struct net_device
 #define        NETDEV_ALIGN            32
 #define        NETDEV_ALIGN_CONST      (NETDEV_ALIGN - 1)
 
+/*
+ * Net namespace inlines
+ */
+static inline
+struct net *dev_net(const struct net_device *dev)
+{
+#ifdef CONFIG_NET_NS
+       return dev->nd_net;
+#else
+       return &init_net;
+#endif
+}
+
+static inline
+void dev_net_set(struct net_device *dev, struct net *net)
+{
+#ifdef CONFIG_NET_NS
+       release_net(dev->nd_net);
+       dev->nd_net = hold_net(net);
+#endif
+}
+
 /**
  *     netdev_priv - access network device private data
  *     @dev: network device
@@ -811,7 +859,7 @@ static inline struct net_device *next_net_device(struct net_device *dev)
        struct list_head *lh;
        struct net *net;
 
-       net = dev->nd_net;
+       net = dev_net(dev);
        lh = dev->dev_list.next;
        return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
 }
@@ -1479,6 +1527,12 @@ static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
                unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
 }
 
+static inline void netif_set_gso_max_size(struct net_device *dev,
+                                         unsigned int size)
+{
+       dev->gso_max_size = size;
+}
+
 /* On bonding slaves other than the currently active slave, suppress
  * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
  * ARP on active-backup slaves with arp_validate enabled.