From 4fe5d5c07ab615a52fd1b0ceba5aeed7c612821a Mon Sep 17 00:00:00 2001
From: Paul Moore <paul.moore@hp.com>
Date: Mon, 25 Sep 2006 15:54:03 -0700
Subject: [PATCH] [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>
---
include/net/netlink.h | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/include/net/netlink.h b/include/net/netlink.h
index 2897a73f81eb8d..4ab68a7a636a92 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
@@ -950,6 +951,24 @@ static inline int nla_nest_cancel(struct sk_buff *skb, struct nlattr *start)
return nlmsg_trim(skb, 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
--
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