#include <linux/seq_file.h>
#include <linux/rcupdate.h>
#include <net/protocol.h>
+#include <net/netfilter/nf_queue.h>
#include "nf_internals.h"
return -EINVAL;
mutex_lock(&queue_handler_mutex);
- if (queue_handler[pf] != qh) {
+ if (queue_handler[pf] && queue_handler[pf] != qh) {
mutex_unlock(&queue_handler_mutex);
return -EINVAL;
}
}
EXPORT_SYMBOL_GPL(nf_unregister_queue_handlers);
+static void nf_queue_entry_release_refs(struct nf_queue_entry *entry)
+{
+ /* Release those devices we held, or Alexey will kill me. */
+ if (entry->indev)
+ dev_put(entry->indev);
+ if (entry->outdev)
+ dev_put(entry->outdev);
+#ifdef CONFIG_BRIDGE_NETFILTER
+ if (entry->skb->nf_bridge) {
+ struct nf_bridge_info *nf_bridge = entry->skb->nf_bridge;
+
+ if (nf_bridge->physindev)
+ dev_put(nf_bridge->physindev);
+ if (nf_bridge->physoutdev)
+ dev_put(nf_bridge->physoutdev);
+ }
+#endif
+ /* Drop reference to owner of hook which queued us. */
+ module_put(entry->elem->owner);
+}
+
/*
* Any packet that leaves via this function must come back
* through nf_reinject().
unsigned int queuenum)
{
int status;
- struct nf_info *info;
+ struct nf_queue_entry *entry = NULL;
#ifdef CONFIG_BRIDGE_NETFILTER
- struct net_device *physindev = NULL;
- struct net_device *physoutdev = NULL;
+ struct net_device *physindev;
+ struct net_device *physoutdev;
#endif
- struct nf_afinfo *afinfo;
+ const struct nf_afinfo *afinfo;
const struct nf_queue_handler *qh;
/* QUEUE == DROP if noone is waiting, to be safe. */
rcu_read_lock();
qh = rcu_dereference(queue_handler[pf]);
- if (!qh) {
- rcu_read_unlock();
- kfree_skb(skb);
- return 1;
- }
+ if (!qh)
+ goto err_unlock;
afinfo = nf_get_afinfo(pf);
- if (!afinfo) {
- rcu_read_unlock();
- kfree_skb(skb);
- return 1;
- }
-
- info = kmalloc(sizeof(*info) + afinfo->route_key_size, GFP_ATOMIC);
- if (!info) {
- if (net_ratelimit())
- printk(KERN_ERR "OOM queueing packet %p\n",
- skb);
- rcu_read_unlock();
- kfree_skb(skb);
- return 1;
- }
-
- *info = (struct nf_info) {
- (struct nf_hook_ops *)elem, pf, hook, indev, outdev, okfn };
+ if (!afinfo)
+ goto err_unlock;
+
+ entry = kmalloc(sizeof(*entry) + afinfo->route_key_size, GFP_ATOMIC);
+ if (!entry)
+ goto err_unlock;
+
+ *entry = (struct nf_queue_entry) {
+ .skb = skb,
+ .elem = list_entry(elem, struct nf_hook_ops, list),
+ .pf = pf,
+ .hook = hook,
+ .indev = indev,
+ .outdev = outdev,
+ .okfn = okfn,
+ };
/* If it's going away, ignore hook. */
- if (!try_module_get(info->elem->owner)) {
+ if (!try_module_get(entry->elem->owner)) {
rcu_read_unlock();
- kfree(info);
+ kfree(entry);
return 0;
}
dev_hold(physoutdev);
}
#endif
- afinfo->saveroute(skb, info);
- status = qh->outfn(skb, info, queuenum, qh->data);
+ afinfo->saveroute(skb, entry);
+ status = qh->outfn(entry, queuenum);
rcu_read_unlock();
if (status < 0) {
- /* James M doesn't say fuck enough. */
- if (indev)
- dev_put(indev);
- if (outdev)
- dev_put(outdev);
-#ifdef CONFIG_BRIDGE_NETFILTER
- if (physindev)
- dev_put(physindev);
- if (physoutdev)
- dev_put(physoutdev);
-#endif
- module_put(info->elem->owner);
- kfree(info);
- kfree_skb(skb);
-
- return 1;
+ nf_queue_entry_release_refs(entry);
+ goto err;
}
return 1;
+
+err_unlock:
+ rcu_read_unlock();
+err:
+ kfree_skb(skb);
+ kfree(entry);
+ return 1;
}
int nf_queue(struct sk_buff *skb,
return 1;
}
-void nf_reinject(struct sk_buff *skb, struct nf_info *info,
- unsigned int verdict)
+void nf_reinject(struct nf_queue_entry *entry, unsigned int verdict)
{
- struct list_head *elem = &info->elem->list;
- struct nf_afinfo *afinfo;
+ struct sk_buff *skb = entry->skb;
+ struct list_head *elem = &entry->elem->list;
+ const struct nf_afinfo *afinfo;
rcu_read_lock();
- /* Release those devices we held, or Alexey will kill me. */
- if (info->indev)
- dev_put(info->indev);
- if (info->outdev)
- dev_put(info->outdev);
-#ifdef CONFIG_BRIDGE_NETFILTER
- if (skb->nf_bridge) {
- if (skb->nf_bridge->physindev)
- dev_put(skb->nf_bridge->physindev);
- if (skb->nf_bridge->physoutdev)
- dev_put(skb->nf_bridge->physoutdev);
- }
-#endif
-
- /* Drop reference to owner of hook which queued us. */
- module_put(info->elem->owner);
+ nf_queue_entry_release_refs(entry);
/* Continue traversal iff userspace said ok... */
if (verdict == NF_REPEAT) {
}
if (verdict == NF_ACCEPT) {
- afinfo = nf_get_afinfo(info->pf);
- if (!afinfo || afinfo->reroute(skb, info) < 0)
+ afinfo = nf_get_afinfo(entry->pf);
+ if (!afinfo || afinfo->reroute(skb, entry) < 0)
verdict = NF_DROP;
}
if (verdict == NF_ACCEPT) {
next_hook:
- verdict = nf_iterate(&nf_hooks[info->pf][info->hook],
- skb, info->hook,
- info->indev, info->outdev, &elem,
- info->okfn, INT_MIN);
+ verdict = nf_iterate(&nf_hooks[entry->pf][entry->hook],
+ skb, entry->hook,
+ entry->indev, entry->outdev, &elem,
+ entry->okfn, INT_MIN);
}
switch (verdict & NF_VERDICT_MASK) {
case NF_ACCEPT:
case NF_STOP:
- info->okfn(skb);
+ local_bh_disable();
+ entry->okfn(skb);
+ local_bh_enable();
case NF_STOLEN:
break;
case NF_QUEUE:
- if (!__nf_queue(skb, elem, info->pf, info->hook,
- info->indev, info->outdev, info->okfn,
+ if (!__nf_queue(skb, elem, entry->pf, entry->hook,
+ entry->indev, entry->outdev, entry->okfn,
verdict >> NF_VERDICT_BITS))
goto next_hook;
break;
kfree_skb(skb);
}
rcu_read_unlock();
- kfree(info);
+ kfree(entry);
return;
}
EXPORT_SYMBOL(nf_reinject);
int __init netfilter_queue_init(void)
{
#ifdef CONFIG_PROC_FS
- struct proc_dir_entry *pde;
-
- pde = create_proc_entry("nf_queue", S_IRUGO, proc_net_netfilter);
- if (!pde)
+ if (!proc_create("nf_queue", S_IRUGO,
+ proc_net_netfilter, &nfqueue_file_ops))
return -1;
- pde->proc_fops = &nfqueue_file_ops;
#endif
return 0;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff