diff options
Diffstat (limited to 'net/netlink/attr.c')
| -rw-r--r-- | net/netlink/attr.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/net/netlink/attr.c b/net/netlink/attr.c index 56c3ce7fe29..ae32c573df0 100644 --- a/net/netlink/attr.c +++ b/net/netlink/attr.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 @@ -456,6 +482,7 @@ int nla_append(struct sk_buff *skb, int attrlen, const void *data) } EXPORT_SYMBOL(nla_validate); +EXPORT_SYMBOL(nla_policy_len); EXPORT_SYMBOL(nla_parse); EXPORT_SYMBOL(nla_find); EXPORT_SYMBOL(nla_strlcpy); |