* 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_s64(skb, type, value,
+ * padattr) 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
+ * nla_put_msecs(skb, type, jiffies,
+ * padattr) add msecs attribute to skb
* nla_put_in_addr(skb, type, addr) add IPv4 address attribute to skb
* nla_put_in6_addr(skb, type, addr) add IPv6 address attribute to skb
*
int nla_memcmp(const struct nlattr *nla, const void *data, size_t size);
int nla_strcmp(const struct nlattr *nla, const char *str);
struct nlattr *__nla_reserve(struct sk_buff *skb, int attrtype, int attrlen);
+struct nlattr *__nla_reserve_64bit(struct sk_buff *skb, int attrtype,
+ int attrlen, int padattr);
void *__nla_reserve_nohdr(struct sk_buff *skb, int attrlen);
struct nlattr *nla_reserve(struct sk_buff *skb, int attrtype, int attrlen);
+struct nlattr *nla_reserve_64bit(struct sk_buff *skb, int attrtype,
+ int attrlen, int padattr);
void *nla_reserve_nohdr(struct sk_buff *skb, int attrlen);
void __nla_put(struct sk_buff *skb, int attrtype, int attrlen,
const void *data);
+void __nla_put_64bit(struct sk_buff *skb, int attrtype, int attrlen,
+ const void *data, int padattr);
void __nla_put_nohdr(struct sk_buff *skb, int attrlen, const void *data);
int nla_put(struct sk_buff *skb, int attrtype, int attrlen, const void *data);
+int nla_put_64bit(struct sk_buff *skb, int attrtype, int attrlen,
+ const void *data, int padattr);
int nla_put_nohdr(struct sk_buff *skb, int attrlen, const void *data);
int nla_append(struct sk_buff *skb, int attrlen, const void *data);
}
/**
- * nla_put_be64 - Add a __be64 netlink attribute to a socket buffer
+ * nla_put_u64_64bit - Add a u64 netlink attribute to a skb and align it
* @skb: socket buffer to add attribute to
* @attrtype: attribute type
* @value: numeric value
+ * @padattr: attribute type for the padding
*/
-static inline int nla_put_be64(struct sk_buff *skb, int attrtype, __be64 value)
+static inline int nla_put_u64_64bit(struct sk_buff *skb, int attrtype,
+ u64 value, int padattr)
{
- return nla_put(skb, attrtype, sizeof(__be64), &value);
+ return nla_put_64bit(skb, attrtype, sizeof(u64), &value, padattr);
}
/**
- * nla_put_net64 - Add 64-bit network byte order netlink attribute to a socket buffer
+ * nla_put_be64 - Add a __be64 netlink attribute to a socket buffer and align it
* @skb: socket buffer to add attribute to
* @attrtype: attribute type
* @value: numeric value
+ * @padattr: attribute type for the padding
*/
-static inline int nla_put_net64(struct sk_buff *skb, int attrtype, __be64 value)
+static inline int nla_put_be64(struct sk_buff *skb, int attrtype, __be64 value,
+ int padattr)
{
- return nla_put_be64(skb, attrtype | NLA_F_NET_BYTEORDER, value);
+ return nla_put_64bit(skb, attrtype, sizeof(__be64), &value, padattr);
}
/**
- * nla_put_le64 - Add a __le64 netlink attribute to a socket buffer
+ * nla_put_net64 - Add 64-bit network byte order nlattr to a skb and align it
* @skb: socket buffer to add attribute to
* @attrtype: attribute type
* @value: numeric value
+ * @padattr: attribute type for the padding
*/
-static inline int nla_put_le64(struct sk_buff *skb, int attrtype, __le64 value)
+static inline int nla_put_net64(struct sk_buff *skb, int attrtype, __be64 value,
+ int padattr)
{
- return nla_put(skb, attrtype, sizeof(__le64), &value);
+ return nla_put_be64(skb, attrtype | NLA_F_NET_BYTEORDER, value,
+ padattr);
+}
+
+/**
+ * nla_put_le64 - Add a __le64 netlink attribute to a socket buffer and align it
+ * @skb: socket buffer to add attribute to
+ * @attrtype: attribute type
+ * @value: numeric value
+ * @padattr: attribute type for the padding
+ */
+static inline int nla_put_le64(struct sk_buff *skb, int attrtype, __le64 value,
+ int padattr)
+{
+ return nla_put_64bit(skb, attrtype, sizeof(__le64), &value, padattr);
}
/**
}
/**
- * nla_put_s64 - Add a s64 netlink attribute to a socket buffer
+ * nla_put_s64 - Add a s64 netlink attribute to a socket buffer and align it
* @skb: socket buffer to add attribute to
* @attrtype: attribute type
* @value: numeric value
+ * @padattr: attribute type for the padding
*/
-static inline int nla_put_s64(struct sk_buff *skb, int attrtype, s64 value)
+static inline int nla_put_s64(struct sk_buff *skb, int attrtype, s64 value,
+ int padattr)
{
- return nla_put(skb, attrtype, sizeof(s64), &value);
+ return nla_put_64bit(skb, attrtype, sizeof(s64), &value, padattr);
}
/**
}
/**
- * nla_put_msecs - Add a msecs netlink attribute to a socket buffer
+ * nla_put_msecs - Add a msecs netlink attribute to a skb and align it
* @skb: socket buffer to add attribute to
* @attrtype: attribute type
* @njiffies: number of jiffies to convert to msecs
+ * @padattr: attribute type for the padding
*/
static inline int nla_put_msecs(struct sk_buff *skb, int attrtype,
- unsigned long njiffies)
+ unsigned long njiffies, int padattr)
{
u64 tmp = jiffies_to_msecs(njiffies);
- return nla_put(skb, attrtype, sizeof(u64), &tmp);
+
+ return nla_put_64bit(skb, attrtype, sizeof(u64), &tmp, padattr);
}
/**
return nla_validate(nla_data(start), nla_len(start), maxtype, policy);
}
+/**
+ * nla_need_padding_for_64bit - test 64-bit alignment of the next attribute
+ * @skb: socket buffer the message is stored in
+ *
+ * Return true if padding is needed to align the next attribute (nla_data()) to
+ * a 64-bit aligned area.
+ */
+static inline bool nla_need_padding_for_64bit(struct sk_buff *skb)
+{
+#ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
+ /* The nlattr header is 4 bytes in size, that's why we test
+ * if the skb->data _is_ aligned. A NOP attribute, plus
+ * nlattr header for next attribute, will make nla_data()
+ * 8-byte aligned.
+ */
+ if (IS_ALIGNED((unsigned long)skb_tail_pointer(skb), 8))
+ return true;
+#endif
+ return false;
+}
+
+/**
+ * nla_align_64bit - 64-bit align the nla_data() of next attribute
+ * @skb: socket buffer the message is stored in
+ * @padattr: attribute type for the padding
+ *
+ * Conditionally emit a padding netlink attribute in order to make
+ * the next attribute we emit have a 64-bit aligned nla_data() area.
+ * This will only be done in architectures which do not have
+ * CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS defined.
+ *
+ * Returns zero on success or a negative error code.
+ */
+static inline int nla_align_64bit(struct sk_buff *skb, int padattr)
+{
+ if (nla_need_padding_for_64bit(skb) &&
+ !nla_reserve(skb, padattr, 0))
+ return -EMSGSIZE;
+
+ return 0;
+}
+
+/**
+ * nla_total_size_64bit - total length of attribute including padding
+ * @payload: length of payload
+ */
+static inline int nla_total_size_64bit(int payload)
+{
+ return NLA_ALIGN(nla_attr_size(payload))
+#ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
+ + NLA_ALIGN(nla_attr_size(0))
+#endif
+ ;
+}
+
/**
* nla_for_each_attr - iterate over a stream of attributes
* @pos: loop counter, set to current attribute
projects / cascardo / linux.git / blobdiff