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netfilter: ipset: Add element count to hash headers 

It would be useful for userspace to query the size of an ipset hash,
however, this data is not exposed to userspace outside of counting the
number of member entries.  This patch uses the attribute
IPSET_ATTR_ELEMENTS to indicate the size in the the header that is
exported to userspace.  This field is then printed by the userspace
tool for hashes.

Signed-off-by: Eric B Munson <emunson@akamai.com>
Cc: Pablo Neira Ayuso <pablo@netfilter.org>
Cc: Josh Hunt <johunt@akamai.com>
Cc: netfilter-devel@vger.kernel.org
Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
This commit is contained in:
Eric B Munson 2016-10-10 21:59:21 +02:00 committed by Jozsef Kadlecsik
parent 837a90eab6
commit a54dad51a8
1 changed files with 2 additions and 1 deletions
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3
net/netfilter/ipset/ip_set_hash_gen.h
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@ -1083,7 +1083,8 @@ mtype_head(struct ip_set *set, struct sk_buff *skb)
goto nla_put_failure;
#endif
if (nla_put_net32(skb, IPSET_ATTR_REFERENCES, htonl(set->ref)) ||
nla_put_net32(skb, IPSET_ATTR_MEMSIZE, htonl(memsize)))
nla_put_net32(skb, IPSET_ATTR_MEMSIZE, htonl(memsize)) ||
nla_put_net32(skb, IPSET_ATTR_ELEMENTS, htonl(h->elements)))
goto nla_put_failure;
if (unlikely(ip_set_put_flags(skb, set)))
goto nla_put_failure;