Hi,
Your patch is applied in the ipset git tree and I'm going to push it for
kernel inclusion.
I modified the comment part: the elements counter can still be incorrect
in the case of a huge set, because elements might time out during the
listing.
Thanks for your patience!
Best regards,
Jozsef
On Thu, 17 Aug 2017, Vishwanath Pai wrote:
> Simple testcase:
>
> $ ipset create test hash:ip timeout 5
> $ ipset add test 1.2.3.4
> $ ipset add test 1.2.2.2
> $ sleep 5
>
> $ ipset l
> Name: test
> Type: hash:ip
> Revision: 5
> Header: family inet hashsize 1024 maxelem 65536 timeout 5
> Size in memory: 296
> References: 0
> Number of entries: 2
> Members:
>
> We return "Number of entries: 2" but no members are listed. That is
> because mtype_list runs "ip_set_timeout_expired" and does not list the
> expired entries, but set->elements is never upated (until mtype_gc
> cleans it up later).
>
> Reviewed-by: Joshua Hunt <johunt@xxxxxxxxxx>
> Signed-off-by: Vishwanath Pai <vpai@xxxxxxxxxx>
> ---
> net/netfilter/ipset/ip_set_hash_gen.h | 12 +++++++++++-
> 1 file changed, 11 insertions(+), 1 deletion(-)
>
> diff --git a/net/netfilter/ipset/ip_set_hash_gen.h b/net/netfilter/ipset/ip_set_hash_gen.h
> index f236c0b..ff3d31c 100644
> --- a/net/netfilter/ipset/ip_set_hash_gen.h
> +++ b/net/netfilter/ipset/ip_set_hash_gen.h
> @@ -1041,12 +1041,22 @@ struct htype {
> static int
> mtype_head(struct ip_set *set, struct sk_buff *skb)
> {
> - const struct htype *h = set->data;
> + struct htype *h = set->data;
> const struct htable *t;
> struct nlattr *nested;
> size_t memsize;
> u8 htable_bits;
>
> + /* If any members have expired, set->elements will be wrong
> + * mytype_expire function will update it with the right count.
> + * we do not hold set->lock here, so grab it first.
> + */
> + if (SET_WITH_TIMEOUT(set)) {
> + spin_lock_bh(&set->lock);
> + mtype_expire(set, h);
> + spin_unlock_bh(&set->lock);
> + }
> +
> rcu_read_lock_bh();
> t = rcu_dereference_bh_nfnl(h->table);
> memsize = mtype_ahash_memsize(h, t) + set->ext_size;
> --
> 1.9.1
>
>
-
E-mail : kadlec@xxxxxxxxxxxxxxxxx, kadlecsik.jozsef@xxxxxxxxxxxxx
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Address : Wigner Research Centre for Physics, Hungarian Academy of Sciences
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