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authorDavid S. Miller <davem@davemloft.net>2009-03-27 05:45:23 (GMT)
committerDavid S. Miller <davem@davemloft.net>2009-03-27 05:45:23 (GMT)
commit01e6de64d9c8d0e75dca3bb4cf898db73abe00d4 (patch)
tree925982e6241e5ac47f268bc2c2942ab0f06775cd /lib/nlattr.c
parent8f1ead2d1a626ed0c85b3d2c2046a49081d5933f (diff)
parentd271e8bd8c60ce059ee36d836ba063cfc61c3e21 (diff)
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-next-2.6
Diffstat (limited to 'lib/nlattr.c')
-rw-r--r--lib/nlattr.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/lib/nlattr.c b/lib/nlattr.c
index 80009a2..c4706eb 100644
--- a/lib/nlattr.c
+++ b/lib/nlattr.c
@@ -133,6 +133,32 @@ errout:
}
/**
+ * nla_policy_len - Determin the max. length of a policy
+ * @policy: policy to use
+ * @n: number of policies
+ *
+ * Determines the max. length of the policy. It is currently used
+ * to allocated Netlink buffers roughly the size of the actual
+ * message.
+ *
+ * Returns 0 on success or a negative error code.
+ */
+int
+nla_policy_len(const struct nla_policy *p, int n)
+{
+ int i, len = 0;
+
+ for (i = 0; i < n; i++) {
+ if (p->len)
+ len += nla_total_size(p->len);
+ else if (nla_attr_minlen[p->type])
+ len += nla_total_size(nla_attr_minlen[p->type]);
+ }
+
+ return len;
+}
+
+/**
* nla_parse - Parse a stream of attributes into a tb buffer
* @tb: destination array with maxtype+1 elements
* @maxtype: maximum attribute type to be expected
@@ -467,6 +493,7 @@ EXPORT_SYMBOL(nla_append);
#endif
EXPORT_SYMBOL(nla_validate);
+EXPORT_SYMBOL(nla_policy_len);
EXPORT_SYMBOL(nla_parse);
EXPORT_SYMBOL(nla_find);
EXPORT_SYMBOL(nla_strlcpy);

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