[NET] NETNS: Omit net_device->nd_net without CONFIG_NET_NS.

[net-next-2.6.git] / net / ipv6 / reassembly.c

diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index ab2d53b81b70b2db90ae4b371c6c277ed0ed6417..4e1447634f3617bd9ea919a53704c74d6bff82bf 100644 (file)
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -84,14 +84,14 @@ struct frag_queue
 
 static struct inet_frags ip6_frags;
 
-int ip6_frag_nqueues(void)
+int ip6_frag_nqueues(struct net *net)
 {
-       return ip6_frags.nqueues;
+       return net->ipv6.frags.nqueues;
 }
 
-int ip6_frag_mem(void)
+int ip6_frag_mem(struct net *net)
 {
-       return atomic_read(&ip6_frags.mem);
+       return atomic_read(&net->ipv6.frags.mem);
 }
 
 static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *prev,
@@ -149,11 +149,12 @@ int ip6_frag_match(struct inet_frag_queue *q, void *a)
 EXPORT_SYMBOL(ip6_frag_match);
 
 /* Memory Tracking Functions. */
-static inline void frag_kfree_skb(struct sk_buff *skb, int *work)
+static inline void frag_kfree_skb(struct netns_frags *nf,
+               struct sk_buff *skb, int *work)
 {
        if (work)
                *work -= skb->truesize;
-       atomic_sub(skb->truesize, &ip6_frags.mem);
+       atomic_sub(skb->truesize, &nf->mem);
        kfree_skb(skb);
 }
 
@@ -183,11 +184,11 @@ static __inline__ void fq_kill(struct frag_queue *fq)
        inet_frag_kill(&fq->q, &ip6_frags);
 }
 
-static void ip6_evictor(struct inet6_dev *idev)
+static void ip6_evictor(struct net *net, struct inet6_dev *idev)
 {
        int evicted;
 
-       evicted = inet_frag_evictor(&ip6_frags);
+       evicted = inet_frag_evictor(&net->ipv6.frags, &ip6_frags);
        if (evicted)
                IP6_ADD_STATS_BH(idev, IPSTATS_MIB_REASMFAILS, evicted);
 }
@@ -389,7 +390,7 @@ static int ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb,
                                fq->q.fragments = next;
 
                        fq->q.meat -= free_it->len;
-                       frag_kfree_skb(free_it, NULL);
+                       frag_kfree_skb(fq->q.net, free_it, NULL);
                }
        }
 
@@ -409,7 +410,7 @@ static int ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb,
        }
        fq->q.stamp = skb->tstamp;
        fq->q.meat += skb->len;
-       atomic_add(skb->truesize, &ip6_frags.mem);
+       atomic_add(skb->truesize, &fq->q.net->mem);
 
        /* The first fragment.
         * nhoffset is obtained from the first fragment, of course.
@@ -423,7 +424,7 @@ static int ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb,
                return ip6_frag_reasm(fq, prev, dev);
 
        write_lock(&ip6_frags.lock);
-       list_move_tail(&fq->q.lru_list, &ip6_frags.lru_list);
+       list_move_tail(&fq->q.lru_list, &fq->q.net->lru_list);
        write_unlock(&ip6_frags.lock);
        return -1;
 
@@ -503,7 +504,7 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *prev,
                head->len -= clone->len;
                clone->csum = 0;
                clone->ip_summed = head->ip_summed;
-               atomic_add(clone->truesize, &ip6_frags.mem);
+               atomic_add(clone->truesize, &fq->q.net->mem);
        }
 
        /* We have to remove fragment header from datagram and to relocate
@@ -518,7 +519,7 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *prev,
        skb_shinfo(head)->frag_list = head->next;
        skb_reset_transport_header(head);
        skb_push(head, head->data - skb_network_header(head));
-       atomic_sub(head->truesize, &ip6_frags.mem);
+       atomic_sub(head->truesize, &fq->q.net->mem);
 
        for (fp=head->next; fp; fp = fp->next) {
                head->data_len += fp->len;
@@ -528,7 +529,7 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *prev,
                else if (head->ip_summed == CHECKSUM_COMPLETE)
                        head->csum = csum_add(head->csum, fp->csum);
                head->truesize += fp->truesize;
-               atomic_sub(fp->truesize, &ip6_frags.mem);
+               atomic_sub(fp->truesize, &fq->q.net->mem);
        }
 
        head->next = NULL;
@@ -599,9 +600,9 @@ static int ipv6_frag_rcv(struct sk_buff *skb)
                return 1;
        }
 
-       net = skb->dev->nd_net;
-       if (atomic_read(&ip6_frags.mem) > init_net.ipv6.sysctl.frags.high_thresh)
-               ip6_evictor(ip6_dst_idev(skb->dst));
+       net = dev_net(skb->dev);
+       if (atomic_read(&net->ipv6.frags.mem) > net->ipv6.frags.high_thresh)
+               ip6_evictor(net, ip6_dst_idev(skb->dst));
 
        if ((fq = fq_find(net, fhdr->identification, &hdr->saddr, &hdr->daddr,
                          ip6_dst_idev(skb->dst))) != NULL) {
@@ -632,7 +633,7 @@ static struct ctl_table ip6_frags_ctl_table[] = {
        {
                .ctl_name       = NET_IPV6_IP6FRAG_HIGH_THRESH,
                .procname       = "ip6frag_high_thresh",
-               .data           = &init_net.ipv6.sysctl.frags.high_thresh,
+               .data           = &init_net.ipv6.frags.high_thresh,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec
@@ -640,7 +641,7 @@ static struct ctl_table ip6_frags_ctl_table[] = {
        {
                .ctl_name       = NET_IPV6_IP6FRAG_LOW_THRESH,
                .procname       = "ip6frag_low_thresh",
-               .data           = &init_net.ipv6.sysctl.frags.low_thresh,
+               .data           = &init_net.ipv6.frags.low_thresh,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec
@@ -648,7 +649,7 @@ static struct ctl_table ip6_frags_ctl_table[] = {
        {
                .ctl_name       = NET_IPV6_IP6FRAG_TIME,
                .procname       = "ip6frag_time",
-               .data           = &init_net.ipv6.sysctl.frags.timeout,
+               .data           = &init_net.ipv6.frags.timeout,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec_jiffies,
@@ -657,7 +658,7 @@ static struct ctl_table ip6_frags_ctl_table[] = {
        {
                .ctl_name       = NET_IPV6_IP6FRAG_SECRET_INTERVAL,
                .procname       = "ip6frag_secret_interval",
-               .data           = &init_net.ipv6.sysctl.frags.secret_interval,
+               .data           = &ip6_frags.secret_interval,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec_jiffies,
@@ -668,31 +669,76 @@ static struct ctl_table ip6_frags_ctl_table[] = {
 
 static int ip6_frags_sysctl_register(struct net *net)
 {
+       struct ctl_table *table;
        struct ctl_table_header *hdr;
 
-       hdr = register_net_sysctl_table(net, net_ipv6_ctl_path,
-                       ip6_frags_ctl_table);
-       return hdr == NULL ? -ENOMEM : 0;
+       table = ip6_frags_ctl_table;
+       if (net != &init_net) {
+               table = kmemdup(table, sizeof(ip6_frags_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);
+       if (hdr == NULL)
+               goto err_reg;
+
+       net->ipv6.sysctl.frags_hdr = hdr;
+       return 0;
+
+err_reg:
+       if (net != &init_net)
+               kfree(table);
+err_alloc:
+       return -ENOMEM;
+}
+
+static void ip6_frags_sysctl_unregister(struct net *net)
+{
+       struct ctl_table *table;
+
+       table = net->ipv6.sysctl.frags_hdr->ctl_table_arg;
+       unregister_net_sysctl_table(net->ipv6.sysctl.frags_hdr);
+       kfree(table);
 }
 #else
 static inline int ip6_frags_sysctl_register(struct net *net)
 {
        return 0;
 }
+
+static inline void ip6_frags_sysctl_unregister(struct net *net)
+{
+}
 #endif
 
 static int ipv6_frags_init_net(struct net *net)
 {
-       ip6_frags.ctl = &net->ipv6.sysctl.frags;
+       net->ipv6.frags.high_thresh = 256 * 1024;
+       net->ipv6.frags.low_thresh = 192 * 1024;
+       net->ipv6.frags.timeout = IPV6_FRAG_TIMEOUT;
 
-       net->ipv6.sysctl.frags.high_thresh = 256 * 1024;
-       net->ipv6.sysctl.frags.low_thresh = 192 * 1024;
-       net->ipv6.sysctl.frags.timeout = IPV6_FRAG_TIMEOUT;
-       net->ipv6.sysctl.frags.secret_interval = 10 * 60 * HZ;
+       inet_frags_init_net(&net->ipv6.frags);
 
        return ip6_frags_sysctl_register(net);
 }
 
+static void ipv6_frags_exit_net(struct net *net)
+{
+       ip6_frags_sysctl_unregister(net);
+       inet_frags_exit_net(&net->ipv6.frags, &ip6_frags);
+}
+
+static struct pernet_operations ip6_frags_ops = {
+       .init = ipv6_frags_init_net,
+       .exit = ipv6_frags_exit_net,
+};
+
 int __init ipv6_frag_init(void)
 {
        int ret;
@@ -701,7 +747,7 @@ int __init ipv6_frag_init(void)
        if (ret)
                goto out;
 
-       ipv6_frags_init_net(&init_net);
+       register_pernet_subsys(&ip6_frags_ops);
 
        ip6_frags.hashfn = ip6_hashfn;
        ip6_frags.constructor = ip6_frag_init;
@@ -710,6 +756,7 @@ int __init ipv6_frag_init(void)
        ip6_frags.qsize = sizeof(struct frag_queue);
        ip6_frags.match = ip6_frag_match;
        ip6_frags.frag_expire = ip6_frag_expire;
+       ip6_frags.secret_interval = 10 * 60 * HZ;
        inet_frags_init(&ip6_frags);
 out:
        return ret;
@@ -718,5 +765,6 @@ out:
 void ipv6_frag_exit(void)
 {
        inet_frags_fini(&ip6_frags);
+       unregister_pernet_subsys(&ip6_frags_ops);
        inet6_del_protocol(&frag_protocol, IPPROTO_FRAGMENT);
 }