* Authors:
* Pedro Roque <roque@di.fc.ul.pt>
*
- * $Id: reassembly.c,v 1.26 2001/03/07 22:00:57 davem Exp $
- *
* Based on: net/ipv4/ip_fragment.c
*
* This program is free software; you can redistribute it and/or
* callers should be careful not to use the hash value outside the ipfrag_lock
* as doing so could race with ipfrag_hash_rnd being recalculated.
*/
-static unsigned int ip6qhashfn(__be32 id, struct in6_addr *saddr,
- struct in6_addr *daddr)
+unsigned int inet6_hash_frag(__be32 id, const struct in6_addr *saddr,
+ const struct in6_addr *daddr, u32 rnd)
{
u32 a, b, c;
a += JHASH_GOLDEN_RATIO;
b += JHASH_GOLDEN_RATIO;
- c += ip6_frags.rnd;
+ c += rnd;
__jhash_mix(a, b, c);
a += (__force u32)saddr->s6_addr32[3];
return c & (INETFRAGS_HASHSZ - 1);
}
+EXPORT_SYMBOL_GPL(inet6_hash_frag);
static unsigned int ip6_hashfn(struct inet_frag_queue *q)
{
struct frag_queue *fq;
fq = container_of(q, struct frag_queue, q);
- return ip6qhashfn(fq->id, &fq->saddr, &fq->daddr);
+ return inet6_hash_frag(fq->id, &fq->saddr, &fq->daddr, ip6_frags.rnd);
}
int ip6_frag_match(struct inet_frag_queue *q, void *a)
arg.dst = dst;
read_lock(&ip6_frags.lock);
- hash = ip6qhashfn(id, src, dst);
+ hash = inet6_hash_frag(id, src, dst, ip6_frags.rnd);
q = inet_frag_find(&net->ipv6.frags, &ip6_frags, &arg, hash);
if (q == NULL)
fq->q.fragments = head;
}
- BUG_TRAP(head != NULL);
- BUG_TRAP(FRAG6_CB(head)->offset == 0);
+ WARN_ON(head == NULL);
+ WARN_ON(FRAG6_CB(head)->offset != 0);
/* Unfragmented part is taken from the first segment. */
payload_len = ((head->data - skb_network_header(head)) -
};
#ifdef CONFIG_SYSCTL
-static struct ctl_table ip6_frags_ctl_table[] = {
+static struct ctl_table ip6_frags_ns_ctl_table[] = {
{
.ctl_name = NET_IPV6_IP6FRAG_HIGH_THRESH,
.procname = "ip6frag_high_thresh",
.proc_handler = &proc_dointvec_jiffies,
.strategy = &sysctl_jiffies,
},
+ { }
+};
+
+static struct ctl_table ip6_frags_ctl_table[] = {
{
.ctl_name = NET_IPV6_IP6FRAG_SECRET_INTERVAL,
.procname = "ip6frag_secret_interval",
{ }
};
-static int ip6_frags_sysctl_register(struct net *net)
+static int ip6_frags_ns_sysctl_register(struct net *net)
{
struct ctl_table *table;
struct ctl_table_header *hdr;
- table = ip6_frags_ctl_table;
+ table = ip6_frags_ns_ctl_table;
if (net != &init_net) {
- table = kmemdup(table, sizeof(ip6_frags_ctl_table), GFP_KERNEL);
+ table = kmemdup(table, sizeof(ip6_frags_ns_ctl_table), GFP_KERNEL);
if (table == NULL)
goto err_alloc;
table[0].data = &net->ipv6.frags.high_thresh;
table[1].data = &net->ipv6.frags.low_thresh;
table[2].data = &net->ipv6.frags.timeout;
- table[3].mode &= ~0222;
}
hdr = register_net_sysctl_table(net, net_ipv6_ctl_path, table);
return -ENOMEM;
}
-static void ip6_frags_sysctl_unregister(struct net *net)
+static void ip6_frags_ns_sysctl_unregister(struct net *net)
{
struct ctl_table *table;
unregister_net_sysctl_table(net->ipv6.sysctl.frags_hdr);
kfree(table);
}
+
+static struct ctl_table_header *ip6_ctl_header;
+
+static int ip6_frags_sysctl_register(void)
+{
+ ip6_ctl_header = register_net_sysctl_rotable(net_ipv6_ctl_path,
+ ip6_frags_ctl_table);
+ return ip6_ctl_header == NULL ? -ENOMEM : 0;
+}
+
+static void ip6_frags_sysctl_unregister(void)
+{
+ unregister_net_sysctl_table(ip6_ctl_header);
+}
#else
-static inline int ip6_frags_sysctl_register(struct net *net)
+static inline int ip6_frags_ns_sysctl_register(struct net *net)
{
return 0;
}
-static inline void ip6_frags_sysctl_unregister(struct net *net)
+static inline void ip6_frags_ns_sysctl_unregister(struct net *net)
+{
+}
+
+static inline int ip6_frags_sysctl_register(void)
+{
+ return 0;
+}
+
+static inline void ip6_frags_sysctl_unregister(void)
{
}
#endif
inet_frags_init_net(&net->ipv6.frags);
- return ip6_frags_sysctl_register(net);
+ return ip6_frags_ns_sysctl_register(net);
}
static void ipv6_frags_exit_net(struct net *net)
{
- ip6_frags_sysctl_unregister(net);
+ ip6_frags_ns_sysctl_unregister(net);
inet_frags_exit_net(&net->ipv6.frags, &ip6_frags);
}
if (ret)
goto out;
- register_pernet_subsys(&ip6_frags_ops);
+ ret = ip6_frags_sysctl_register();
+ if (ret)
+ goto err_sysctl;
+
+ ret = register_pernet_subsys(&ip6_frags_ops);
+ if (ret)
+ goto err_pernet;
ip6_frags.hashfn = ip6_hashfn;
ip6_frags.constructor = ip6_frag_init;
inet_frags_init(&ip6_frags);
out:
return ret;
+
+err_pernet:
+ ip6_frags_sysctl_unregister();
+err_sysctl:
+ inet6_del_protocol(&frag_protocol, IPPROTO_FRAGMENT);
+ goto out;
}
void ipv6_frag_exit(void)
{
inet_frags_fini(&ip6_frags);
+ ip6_frags_sysctl_unregister();
unregister_pernet_subsys(&ip6_frags_ops);
inet6_del_protocol(&frag_protocol, IPPROTO_FRAGMENT);
}