Re: hashsize in nf_conntrack_ipv4

[Patrick McHardy <kaber@xxxxxxxxx>]

李伟华 wrote:
> kernel version 2.6.23.9
>
> when i load nf_conntrack_ipv4 with cmdline "modprobe ip_conntrack hashsize=10000" , 
> i got a err msg 
>          "FATAL: Error inserting nf_conntrack_ipv4 (/lib/modules/2.6.23.9/kernel/net/ipv4/netfilter/nf_conntrack_ipv4.ko):    
>          Unknown symbol in module, or unknown parameter (see dmesg)"   , 
> and endline in dmesg output 
>          "nf_conntrack_ipv4: Unknown parameter `hashsize' "
>
> so,how can i set the buckets number when i loading ip_conntrack ?


Its a parameter of nf_conntrack now. But this is actually a bug since
we wanted to stay compatible from a user perspective. Could you
try if this patch makes it work with modprobe ip_conntrack again?

diff --git a/include/net/netfilter/nf_conntrack.h b/include/net/netfilter/nf_conntrack.h
index 90fb66d..4ac5ab1 100644
--- a/include/net/netfilter/nf_conntrack.h
+++ b/include/net/netfilter/nf_conntrack.h
@@ -249,6 +249,7 @@ static inline int nf_ct_is_untracked(const struct sk_buff *skb)
 	return (skb->nfct == &nf_conntrack_untracked.ct_general);
 }
 
+extern int nf_conntrack_set_hashsize(const char *val, struct kernel_param *kp);
 extern unsigned int nf_conntrack_htable_size;
 extern int nf_conntrack_checksum;
 extern atomic_t nf_conntrack_count;
diff --git a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
index 831e9b2..910dae7 100644
--- a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
+++ b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
@@ -419,6 +419,9 @@ struct nf_conntrack_l3proto nf_conntrack_l3proto_ipv4 __read_mostly = {
 	.me		 = THIS_MODULE,
 };
 
+module_param_call(hashsize, nf_conntrack_set_hashsize, param_get_uint,
+		  &nf_conntrack_htable_size, 0600);
+
 MODULE_ALIAS("nf_conntrack-" __stringify(AF_INET));
 MODULE_ALIAS("ip_conntrack");
 MODULE_LICENSE("GPL");
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
index 000c2fb..91f8dbd 100644
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -1016,7 +1016,7 @@ struct hlist_head *nf_ct_alloc_hashtable(int *sizep, int *vmalloced)
 }
 EXPORT_SYMBOL_GPL(nf_ct_alloc_hashtable);
 
-int set_hashsize(const char *val, struct kernel_param *kp)
+int nf_conntrack_set_hashsize(const char *val, struct kernel_param *kp)
 {
 	int i, bucket, hashsize, vmalloced;
 	int old_vmalloced, old_size;
@@ -1064,7 +1064,7 @@ int set_hashsize(const char *val, struct kernel_param *kp)
 	return 0;
 }
 
-module_param_call(hashsize, set_hashsize, param_get_uint,
+module_param_call(hashsize, nf_conntrack_set_hashsize, param_get_uint,
 		  &nf_conntrack_htable_size, 0600);
 
 int __init nf_conntrack_init(void)