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authorPaul Moore <paul.moore@hp.com>2006-09-25 15:54:03 -0700
committerDavid S. Miller <davem@davemloft.net>2006-09-25 15:54:03 -0700
commit4fe5d5c07ab615a52fd1b0ceba5aeed7c612821a (patch)
tree245e504bb1049e86f9f6dc369b679c5a5ca495ec
parent22acb19a91d2b551ea37647747972e5286284b22 (diff)
downloadop-kernel-dev-4fe5d5c07ab615a52fd1b0ceba5aeed7c612821a.zip
op-kernel-dev-4fe5d5c07ab615a52fd1b0ceba5aeed7c612821a.tar.gz
[Netlink]: add nla_validate_nested()
Add a new function, nla_validate_nested(), to validate nested Netlink attributes. Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/net/netlink.h19
1 files changed, 19 insertions, 0 deletions
diff --git a/include/net/netlink.h b/include/net/netlink.h
index 2897a73..4ab68a7 100644
--- a/include/net/netlink.h
+++ b/include/net/netlink.h
@@ -146,6 +146,7 @@
* nla_ok(nla, remaining) does nla fit into remaining bytes?
* nla_next(nla, remaining) get next netlink attribute
* nla_validate() validate a stream of attributes
+ * nla_validate_nested() validate a stream of nested attributes
* nla_find() find attribute in stream of attributes
* nla_find_nested() find attribute in nested attributes
* nla_parse() parse and validate stream of attrs
@@ -951,6 +952,24 @@ static inline int nla_nest_cancel(struct sk_buff *skb, struct nlattr *start)
}
/**
+ * nla_validate_nested - Validate a stream of nested attributes
+ * @start: container attribute
+ * @maxtype: maximum attribute type to be expected
+ * @policy: validation policy
+ *
+ * Validates all attributes in the nested attribute stream against the
+ * specified policy. Attributes with a type exceeding maxtype will be
+ * ignored. See documenation of struct nla_policy for more details.
+ *
+ * Returns 0 on success or a negative error code.
+ */
+static inline int nla_validate_nested(struct nlattr *start, int maxtype,
+ struct nla_policy *policy)
+{
+ return nla_validate(nla_data(start), nla_len(start), maxtype, policy);
+}
+
+/**
* nla_for_each_attr - iterate over a stream of attributes
* @pos: loop counter, set to current attribute
* @head: head of attribute stream
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