diff options
| author |   Aaron Conole <aconole@bytheb.org> | 2016-09-21 11:35:07 -0400 |
|---|---|---|
| committer |   Pablo Neira Ayuso <pablo@netfilter.org> | 2016-09-25 14:38:48 +0200 |
| commit | e3b37f11e6e4e6b6f02cc762f182ce233d2c1c9d (patch) | |
| tree | 09f9f1a8b9e8e7e173e1059c5e251c19a9852df6 /net/netfilter/nf_queue.c | |
| parent | netfilter: nf_queue: whitespace cleanup (diff) | |
| download | linux-dev-e3b37f11e6e4e6b6f02cc762f182ce233d2c1c9d.tar.xz linux-dev-e3b37f11e6e4e6b6f02cc762f182ce233d2c1c9d.zip | |
netfilter: replace list_head with single linked list
The netfilter hook list never uses the prev pointer, and so can be trimmed to
be a simple singly-linked list.
In addition to having a more light weight structure for hook traversal,
struct net becomes 5568 bytes (down from 6400) and struct net_device becomes
2176 bytes (down from 2240).
Signed-off-by: Aaron Conole <aconole@bytheb.org>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter/nf_queue.c')
| -rw-r--r-- | net/netfilter/nf_queue.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/net/netfilter/nf_queue.c b/net/netfilter/nf_queue.c index b19ad20a705c..96964a0070e1 100644 --- a/net/netfilter/nf_queue.c +++ b/net/netfilter/nf_queue.c @@ -96,14 +96,14 @@ void nf_queue_entry_get_refs(struct nf_queue_entry *entry) } EXPORT_SYMBOL_GPL(nf_queue_entry_get_refs); -void nf_queue_nf_hook_drop(struct net *net, struct nf_hook_ops *ops) +void nf_queue_nf_hook_drop(struct net *net, const struct nf_hook_entry *entry) { const struct nf_queue_handler *qh; rcu_read_lock(); qh = rcu_dereference(net->nf.queue_handler); if (qh) - qh->nf_hook_drop(net, ops); + qh->nf_hook_drop(net, entry); rcu_read_unlock(); } @@ -112,7 +112,6 @@ void nf_queue_nf_hook_drop(struct net *net, struct nf_hook_ops *ops) * through nf_reinject(). */ int nf_queue(struct sk_buff *skb, - struct nf_hook_ops *elem, struct nf_hook_state *state, unsigned int queuenum) { @@ -141,7 +140,6 @@ int nf_queue(struct sk_buff *skb, *entry = (struct nf_queue_entry) { .skb = skb, - .elem = elem, .state = *state, .size = sizeof(*entry) + afinfo->route_key_size, }; @@ -165,11 +163,15 @@ err: void nf_reinject(struct nf_queue_entry *entry, unsigned int verdict) { + struct nf_hook_entry *hook_entry; struct sk_buff *skb = entry->skb; - struct nf_hook_ops *elem = entry->elem; const struct nf_afinfo *afinfo; + struct nf_hook_ops *elem; int err; + hook_entry = rcu_dereference(entry->state.hook_entries); + elem = &hook_entry->ops; + nf_queue_entry_release_refs(entry); /* Continue traversal iff userspace said ok... */ @@ -186,8 +188,7 @@ void nf_reinject(struct nf_queue_entry *entry, unsigned int verdict) if (verdict == NF_ACCEPT) { next_hook: - verdict = nf_iterate(entry->state.hook_list, - skb, &entry->state, &elem); + verdict = nf_iterate(skb, &entry->state, &hook_entry); } switch (verdict & NF_VERDICT_MASK) { @@ -198,7 +199,8 @@ void nf_reinject(struct nf_queue_entry *entry, unsigned int verdict) local_bh_enable(); break; case NF_QUEUE: - err = nf_queue(skb, elem, &entry->state, + RCU_INIT_POINTER(entry->state.hook_entries, hook_entry); + err = nf_queue(skb, &entry->state, verdict >> NF_VERDICT_QBITS); if (err < 0) { if (err == -ESRCH && |