* nla_next(nla)-----------------------------'
*
* Data Structures:
- * struct nlattr netlink attribtue header
+ * struct nlattr netlink attribute header
*
* Attribute Construction:
* nla_reserve(skb, type, len) reserve room for an attribute
* nla_reserve_nohdr(skb, len) reserve room for an attribute w/o hdr
* nla_put(skb, type, len, data) add attribute to skb
* nla_put_nohdr(skb, len, data) add attribute w/o hdr
+ * nla_append(skb, len, data) append data to skb
*
* Attribute Construction for Basic Types:
* nla_put_u8(skb, type, value) add u8 attribute to skb
* Nested Attributes Construction:
* nla_nest_start(skb, type) start a nested attribute
* nla_nest_end(skb, nla) finalize a nested attribute
+ * nla_nest_compat_start(skb, type, start a nested compat attribute
+ * len, data)
+ * nla_nest_compat_end(skb, type) finalize a nested compat attribute
* nla_nest_cancel(skb, nla) cancel nested attribute construction
*
* Attribute Length Calculations:
* nla_find_nested() find attribute in nested attributes
* nla_parse() parse and validate stream of attrs
* nla_parse_nested() parse nested attribuets
+ * nla_parse_nested_compat() parse nested compat attributes
* nla_for_each_attr() loop over all attributes
* nla_for_each_nested() loop over the nested attributes
*=========================================================================
NLA_FLAG,
NLA_MSECS,
NLA_NESTED,
+ NLA_NESTED_COMPAT,
NLA_NUL_STRING,
NLA_BINARY,
__NLA_TYPE_MAX,
* NLA_NUL_STRING Maximum length of string (excluding NUL)
* NLA_FLAG Unused
* NLA_BINARY Maximum length of attribute payload
+ * NLA_NESTED_COMPAT Exact length of structure payload
* All other Exact length of attribute payload
*
* Example:
*/
struct nl_info {
struct nlmsghdr *nlh;
+ struct net *nl_net;
u32 pid;
};
-extern void netlink_run_queue(struct sock *sk, unsigned int *qlen,
- int (*cb)(struct sk_buff *,
- struct nlmsghdr *));
+extern int netlink_rcv_skb(struct sk_buff *skb,
+ int (*cb)(struct sk_buff *,
+ struct nlmsghdr *));
extern int nlmsg_notify(struct sock *sk, struct sk_buff *skb,
u32 pid, unsigned int group, int report,
gfp_t flags);
int attrlen, const void *data);
extern int nla_put_nohdr(struct sk_buff *skb, int attrlen,
const void *data);
+extern int nla_append(struct sk_buff *skb, int attrlen,
+ const void *data);
/**************************************************************************
* Netlink Messages
* @skb: socket buffer the message is stored in
* @mark: mark to trim to
*
- * Trims the message to the provided mark. Returns -1.
+ * Trims the message to the provided mark.
*/
-static inline int nlmsg_trim(struct sk_buff *skb, const void *mark)
+static inline void nlmsg_trim(struct sk_buff *skb, const void *mark)
{
if (mark)
skb_trim(skb, (unsigned char *) mark - skb->data);
-
- return -1;
}
/**
* @nlh: netlink message header
*
* Removes the complete netlink message including all
- * attributes from the socket buffer again. Returns -1.
+ * attributes from the socket buffer again.
*/
-static inline int nlmsg_cancel(struct sk_buff *skb, struct nlmsghdr *nlh)
+static inline void nlmsg_cancel(struct sk_buff *skb, struct nlmsghdr *nlh)
{
- return nlmsg_trim(skb, nlh);
+ nlmsg_trim(skb, nlh);
}
/**
return nla_total_size(payload) - nla_attr_size(payload);
}
+/**
+ * nla_type - attribute type
+ * @nla: netlink attribute
+ */
+static inline int nla_type(const struct nlattr *nla)
+{
+ return nla->nla_type & NLA_TYPE_MASK;
+}
+
/**
* nla_data - head of payload
* @nla: netlink attribute
}
/**
- * nla_next - next netlink attribte in attribute stream
+ * nla_next - next netlink attribute in attribute stream
* @nla: netlink attribute
* @remaining: number of bytes remaining in attribute stream
*
{
return nla_parse(tb, maxtype, nla_data(nla), nla_len(nla), policy);
}
+
+/**
+ * nla_parse_nested_compat - parse nested compat attributes
+ * @tb: destination array with maxtype+1 elements
+ * @maxtype: maximum attribute type to be expected
+ * @nla: attribute containing the nested attributes
+ * @data: pointer to point to contained structure
+ * @len: length of contained structure
+ * @policy: validation policy
+ *
+ * Parse a nested compat attribute. The compat attribute contains a structure
+ * and optionally a set of nested attributes. On success the data pointer
+ * points to the nested data and tb contains the parsed attributes
+ * (see nla_parse).
+ */
+static inline int __nla_parse_nested_compat(struct nlattr *tb[], int maxtype,
+ struct nlattr *nla,
+ const struct nla_policy *policy,
+ int len)
+{
+ int nested_len = nla_len(nla) - NLA_ALIGN(len);
+
+ if (nested_len < 0)
+ return -EINVAL;
+ if (nested_len >= nla_attr_size(0))
+ return nla_parse(tb, maxtype, nla_data(nla) + NLA_ALIGN(len),
+ nested_len, policy);
+ memset(tb, 0, sizeof(struct nlattr *) * (maxtype + 1));
+ return 0;
+}
+
+#define nla_parse_nested_compat(tb, maxtype, nla, policy, data, len) \
+({ data = nla_len(nla) >= len ? nla_data(nla) : NULL; \
+ __nla_parse_nested_compat(tb, maxtype, nla, policy, len); })
/**
- * nla_put_u8 - Add a u16 netlink attribute to a socket buffer
+ * nla_put_u8 - Add a u8 netlink attribute to a socket buffer
* @skb: socket buffer to add attribute to
* @attrtype: attribute type
* @value: numeric value
#define NLA_PUT(skb, attrtype, attrlen, data) \
do { \
- if (nla_put(skb, attrtype, attrlen, data) < 0) \
+ if (unlikely(nla_put(skb, attrtype, attrlen, data) < 0)) \
goto nla_put_failure; \
} while(0)
#define NLA_PUT_LE16(skb, attrtype, value) \
NLA_PUT_TYPE(skb, __le16, attrtype, value)
+#define NLA_PUT_BE16(skb, attrtype, value) \
+ NLA_PUT_TYPE(skb, __be16, attrtype, value)
+
#define NLA_PUT_U32(skb, attrtype, value) \
NLA_PUT_TYPE(skb, u32, attrtype, value)
#define NLA_PUT_U64(skb, attrtype, value) \
NLA_PUT_TYPE(skb, u64, attrtype, value)
+#define NLA_PUT_BE64(skb, attrtype, value) \
+ NLA_PUT_TYPE(skb, __be64, attrtype, value)
+
#define NLA_PUT_STRING(skb, attrtype, value) \
NLA_PUT(skb, attrtype, strlen(value) + 1, value)
return *(u16 *) nla_data(nla);
}
+/**
+ * nla_get_be16 - return payload of __be16 attribute
+ * @nla: __be16 netlink attribute
+ */
+static inline __be16 nla_get_be16(struct nlattr *nla)
+{
+ return *(__be16 *) nla_data(nla);
+}
+
/**
* nla_get_le16 - return payload of __le16 attribute
* @nla: __le16 netlink attribute
/**
* nla_nest_end - Finalize nesting of attributes
- * @skb: socket buffer the attribtues are stored in
+ * @skb: socket buffer the attributes are stored in
* @start: container attribute
*
* Corrects the container attribute header to include the all
return skb->len;
}
+/**
+ * nla_nest_compat_start - Start a new level of nested compat attributes
+ * @skb: socket buffer to add attributes to
+ * @attrtype: attribute type of container
+ * @attrlen: length of structure
+ * @data: pointer to structure
+ *
+ * Start a nested compat attribute that contains both a structure and
+ * a set of nested attributes.
+ *
+ * Returns the container attribute
+ */
+static inline struct nlattr *nla_nest_compat_start(struct sk_buff *skb,
+ int attrtype, int attrlen,
+ const void *data)
+{
+ struct nlattr *start = (struct nlattr *)skb_tail_pointer(skb);
+
+ if (nla_put(skb, attrtype, attrlen, data) < 0)
+ return NULL;
+ if (nla_nest_start(skb, attrtype) == NULL) {
+ nlmsg_trim(skb, start);
+ return NULL;
+ }
+ return start;
+}
+
+/**
+ * nla_nest_compat_end - Finalize nesting of compat attributes
+ * @skb: socket buffer the attributes are stored in
+ * @start: container attribute
+ *
+ * Corrects the container attribute header to include the all
+ * appeneded attributes.
+ *
+ * Returns the total data length of the skb.
+ */
+static inline int nla_nest_compat_end(struct sk_buff *skb, struct nlattr *start)
+{
+ struct nlattr *nest = (void *)start + NLMSG_ALIGN(start->nla_len);
+
+ start->nla_len = skb_tail_pointer(skb) - (unsigned char *)start;
+ return nla_nest_end(skb, nest);
+}
+
/**
* nla_nest_cancel - Cancel nesting of attributes
* @skb: socket buffer the message is stored in
* @start: container attribute
*
* Removes the container attribute and including all nested
- * attributes. Returns -1.
+ * attributes. Returns -EMSGSIZE
*/
-static inline int nla_nest_cancel(struct sk_buff *skb, struct nlattr *start)
+static inline void nla_nest_cancel(struct sk_buff *skb, struct nlattr *start)
{
- return nlmsg_trim(skb, start);
+ nlmsg_trim(skb, start);
}
/**