netlink: add signed types

Signed types might be needed in NL communication from time to time
(I need s32 in team driver), so add them.

Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/netlink.h

@@ -98,6 +98,10 @@
  *   nla_put_u16(skb, type, value)	add u16 attribute to skb
  *   nla_put_u32(skb, type, value)	add u32 attribute to skb
  *   nla_put_u64(skb, type, value)	add u64 attribute to skb
+ *   nla_put_s8(skb, type, value)	add s8 attribute to skb
+ *   nla_put_s16(skb, type, value)	add s16 attribute to skb
+ *   nla_put_s32(skb, type, value)	add s32 attribute to skb
+ *   nla_put_s64(skb, type, value)	add s64 attribute to skb
  *   nla_put_string(skb, type, str)	add string attribute to skb
  *   nla_put_flag(skb, type)		add flag attribute to skb
  *   nla_put_msecs(skb, type, jiffies)	add msecs attribute to skb
@@ -121,6 +125,10 @@
  *   nla_get_u16(nla)			get payload for a u16 attribute
  *   nla_get_u32(nla)			get payload for a u32 attribute
  *   nla_get_u64(nla)			get payload for a u64 attribute
+ *   nla_get_s8(nla)			get payload for a s8 attribute
+ *   nla_get_s16(nla)			get payload for a s16 attribute
+ *   nla_get_s32(nla)			get payload for a s32 attribute
+ *   nla_get_s64(nla)			get payload for a s64 attribute
  *   nla_get_flag(nla)			return 1 if flag is true
  *   nla_get_msecs(nla)			get payload for a msecs attribute
  *
@@ -160,6 +168,10 @@ enum {
 	NLA_NESTED_COMPAT,
 	NLA_NUL_STRING,
 	NLA_BINARY,
+	NLA_S8,
+	NLA_S16,
+	NLA_S32,
+	NLA_S64,
 	__NLA_TYPE_MAX,
 };
 
@@ -183,6 +195,8 @@ enum {
  *    NLA_NESTED_COMPAT    Minimum length of structure payload
  *    NLA_U8, NLA_U16,
  *    NLA_U32, NLA_U64,
+ *    NLA_S8, NLA_S16,
+ *    NLA_S32, NLA_S64,
  *    NLA_MSECS            Leaving the length field zero will verify the
  *                         given type fits, using it verifies minimum length
  *                         just like "All other"
@@ -878,6 +892,50 @@ static inline int nla_put_le64(struct sk_buff *skb, int attrtype, __le64 value)
 	return nla_put(skb, attrtype, sizeof(__le64), &value);
 }
 
+/**
+ * nla_put_s8 - Add a s8 netlink attribute to a socket buffer
+ * @skb: socket buffer to add attribute to
+ * @attrtype: attribute type
+ * @value: numeric value
+ */
+static inline int nla_put_s8(struct sk_buff *skb, int attrtype, s8 value)
+{
+	return nla_put(skb, attrtype, sizeof(s8), &value);
+}
+
+/**
+ * nla_put_s16 - Add a s16 netlink attribute to a socket buffer
+ * @skb: socket buffer to add attribute to
+ * @attrtype: attribute type
+ * @value: numeric value
+ */
+static inline int nla_put_s16(struct sk_buff *skb, int attrtype, s16 value)
+{
+	return nla_put(skb, attrtype, sizeof(s16), &value);
+}
+
+/**
+ * nla_put_s32 - Add a s32 netlink attribute to a socket buffer
+ * @skb: socket buffer to add attribute to
+ * @attrtype: attribute type
+ * @value: numeric value
+ */
+static inline int nla_put_s32(struct sk_buff *skb, int attrtype, s32 value)
+{
+	return nla_put(skb, attrtype, sizeof(s32), &value);
+}
+
+/**
+ * nla_put_s64 - Add a s64 netlink attribute to a socket buffer
+ * @skb: socket buffer to add attribute to
+ * @attrtype: attribute type
+ * @value: numeric value
+ */
+static inline int nla_put_s64(struct sk_buff *skb, int attrtype, s64 value)
+{
+	return nla_put(skb, attrtype, sizeof(s64), &value);
+}
+
 /**
  * nla_put_string - Add a string netlink attribute to a socket buffer
  * @skb: socket buffer to add attribute to
@@ -993,6 +1051,46 @@ static inline __be64 nla_get_be64(const struct nlattr *nla)
 	return tmp;
 }
 
+/**
+ * nla_get_s32 - return payload of s32 attribute
+ * @nla: s32 netlink attribute
+ */
+static inline s32 nla_get_s32(const struct nlattr *nla)
+{
+	return *(s32 *) nla_data(nla);
+}
+
+/**
+ * nla_get_s16 - return payload of s16 attribute
+ * @nla: s16 netlink attribute
+ */
+static inline s16 nla_get_s16(const struct nlattr *nla)
+{
+	return *(s16 *) nla_data(nla);
+}
+
+/**
+ * nla_get_s8 - return payload of s8 attribute
+ * @nla: s8 netlink attribute
+ */
+static inline s8 nla_get_s8(const struct nlattr *nla)
+{
+	return *(s8 *) nla_data(nla);
+}
+
+/**
+ * nla_get_s64 - return payload of s64 attribute
+ * @nla: s64 netlink attribute
+ */
+static inline s64 nla_get_s64(const struct nlattr *nla)
+{
+	s64 tmp;
+
+	nla_memcpy(&tmp, nla, sizeof(tmp));
+
+	return tmp;
+}
+
 /**
  * nla_get_flag - return payload of flag attribute
  * @nla: flag netlink attribute