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[Netlink]: add nla_validate_nested()

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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>
This commit is contained in:
Paul Moore 2006-09-25 15:54:03 -07:00 committed by David S. Miller
parent 22acb19a91
commit 4fe5d5c07a
1 changed files with 19 additions and 0 deletions
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19
include/net/netlink.h
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@ -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