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Message-ID: <20100331182116.GB2822@psychotron.redhat.com>
Date: Wed, 31 Mar 2010 20:21:17 +0200
From: Jiri Pirko <jpirko@...hat.com>
To: Patrick McHardy <kaber@...sh.net>
Cc: netdev@...r.kernel.org, netfilter-devel@...r.kernel.org,
netfilter@...r.kernel.org, davem@...emloft.net,
Krzysztof Oledzki <ole@....pl>
Subject: Re: [net-next-2.6 PATCH] netfilter: ctnetlink: compute message size
properly
Wed, Mar 31, 2010 at 07:46:50PM CEST, kaber@...sh.net wrote:
>Jiri Pirko wrote:
>> Message size should be dependent on net->ct.sysctl_acct, not on
>> CONFIG_NF_CT_ACCT definition.
>
>Krzysztof actually wanted to get rid of the config option entirely
>some time ago, but at that time there were some (now solved) problems
>that prevented his. I've CCed him, hoping that this will finally
>get completed :)
>
>> Signed-off-by: Jiri Pirko <jpirko@...hat.com>
>>
>> diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
>> index 569410a..2b0cfa4 100644
>> --- a/net/netfilter/nf_conntrack_netlink.c
>> +++ b/net/netfilter/nf_conntrack_netlink.c
>> @@ -426,6 +426,19 @@ ctnetlink_proto_size(const struct nf_conn *ct)
>> }
>>
>> static inline size_t
>> +ctnetlink_counters_size(const struct nf_conn *ct)
>> +{
>> + struct net *net = nf_ct_net(ct);
>> +
>> + if (!net->ct.sysctl_acct)
>> + return 0;
>> + return 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */
>> + + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */
>> + + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */
>> + ;
>
>This is also not fully correct since the sysctl only affects newly
>created conntracks, existing ones still have counters that are dumped.
>I'd suggest to simple check whether the conntrack has an accounting
>extension.
Okay, I see your point. How about this:
Subject: [net-next-2.6 PATCH] netfilter: ctnetlink: compute message size properly V2
Message size should be dependent on net->ct.sysctl_acct, not on
CONFIG_NF_CT_ACCT definition.
Signed-off-by: Jiri Pirko <jpirko@...hat.com>
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index 569410a..44487d8 100644
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -426,6 +426,17 @@ ctnetlink_proto_size(const struct nf_conn *ct)
}
static inline size_t
+ctnetlink_counters_size(const struct nf_conn *ct)
+{
+ if (!nf_ct_ext_exist(ct, NF_CT_EXT_ACCT))
+ return 0;
+ return 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */
+ + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */
+ + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */
+ ;
+}
+
+static inline size_t
ctnetlink_nlmsg_size(const struct nf_conn *ct)
{
return NLMSG_ALIGN(sizeof(struct nfgenmsg))
@@ -435,11 +446,7 @@ ctnetlink_nlmsg_size(const struct nf_conn *ct)
+ 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */
+ nla_total_size(sizeof(u_int32_t)) /* CTA_ID */
+ nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */
-#ifdef CONFIG_NF_CT_ACCT
- + 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */
- + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */
- + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */
-#endif
+ + ctnetlink_counters_size(ct)
+ nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */
+ nla_total_size(0) /* CTA_PROTOINFO */
+ nla_total_size(0) /* CTA_HELP */
--
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