diff options
author | Florian Westphal <fw@strlen.de> | 2017-12-01 00:21:03 +0100 |
---|---|---|
committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2018-01-08 18:01:06 +0100 |
commit | 26888dfd7e7454686b8d3ea9ba5045d5f236e4d7 (patch) | |
tree | 61d1f7799b39dfa9a78de032d1efc12f1d96b2bd | |
parent | 4e645b47c4f000a503b9c90163ad905786b9bc1d (diff) | |
download | linux-26888dfd7e7454686b8d3ea9ba5045d5f236e4d7.tar.gz linux-26888dfd7e7454686b8d3ea9ba5045d5f236e4d7.tar.bz2 linux-26888dfd7e7454686b8d3ea9ba5045d5f236e4d7.zip |
netfilter: core: remove synchronize_net call if nfqueue is used
since commit 960632ece6949b ("netfilter: convert hook list to an array")
nfqueue no longer stores a pointer to the hook that caused the packet
to be queued. Therefore no extra synchronize_net() call is needed after
dropping the packets enqueued by the old rule blob.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
-rw-r--r-- | include/net/netfilter/nf_queue.h | 2 | ||||
-rw-r--r-- | net/netfilter/core.c | 6 | ||||
-rw-r--r-- | net/netfilter/nf_internals.h | 2 | ||||
-rw-r--r-- | net/netfilter/nf_queue.c | 7 | ||||
-rw-r--r-- | net/netfilter/nfnetlink_queue.c | 9 |
5 files changed, 7 insertions, 19 deletions
diff --git a/include/net/netfilter/nf_queue.h b/include/net/netfilter/nf_queue.h index 814058d0f167..a50a69f5334c 100644 --- a/include/net/netfilter/nf_queue.h +++ b/include/net/netfilter/nf_queue.h @@ -25,7 +25,7 @@ struct nf_queue_entry { struct nf_queue_handler { int (*outfn)(struct nf_queue_entry *entry, unsigned int queuenum); - unsigned int (*nf_hook_drop)(struct net *net); + void (*nf_hook_drop)(struct net *net); }; void nf_register_queue_handler(struct net *net, const struct nf_queue_handler *qh); diff --git a/net/netfilter/core.c b/net/netfilter/core.c index d39bb2c583dc..9a84b6cb99e6 100644 --- a/net/netfilter/core.c +++ b/net/netfilter/core.c @@ -341,7 +341,6 @@ void nf_unregister_net_hook(struct net *net, const struct nf_hook_ops *reg) { struct nf_hook_entries __rcu **pp; struct nf_hook_entries *p; - unsigned int nfq; pp = nf_hook_entry_head(net, reg); if (!pp) @@ -364,10 +363,7 @@ void nf_unregister_net_hook(struct net *net, const struct nf_hook_ops *reg) synchronize_net(); - /* other cpu might still process nfqueue verdict that used reg */ - nfq = nf_queue_nf_hook_drop(net); - if (nfq) - synchronize_net(); + nf_queue_nf_hook_drop(net); kvfree(p); } EXPORT_SYMBOL(nf_unregister_net_hook); diff --git a/net/netfilter/nf_internals.h b/net/netfilter/nf_internals.h index 44284cd2528d..18f6d7ae995b 100644 --- a/net/netfilter/nf_internals.h +++ b/net/netfilter/nf_internals.h @@ -10,7 +10,7 @@ int nf_queue(struct sk_buff *skb, struct nf_hook_state *state, const struct nf_hook_entries *entries, unsigned int index, unsigned int verdict); -unsigned int nf_queue_nf_hook_drop(struct net *net); +void nf_queue_nf_hook_drop(struct net *net); /* nf_log.c */ int __init netfilter_log_init(void); diff --git a/net/netfilter/nf_queue.c b/net/netfilter/nf_queue.c index f7e21953b1de..4e42a4a68a0b 100644 --- a/net/netfilter/nf_queue.c +++ b/net/netfilter/nf_queue.c @@ -96,18 +96,15 @@ void nf_queue_entry_get_refs(struct nf_queue_entry *entry) } EXPORT_SYMBOL_GPL(nf_queue_entry_get_refs); -unsigned int nf_queue_nf_hook_drop(struct net *net) +void nf_queue_nf_hook_drop(struct net *net) { const struct nf_queue_handler *qh; - unsigned int count = 0; rcu_read_lock(); qh = rcu_dereference(net->nf.queue_handler); if (qh) - count = qh->nf_hook_drop(net); + qh->nf_hook_drop(net); rcu_read_unlock(); - - return count; } EXPORT_SYMBOL_GPL(nf_queue_nf_hook_drop); diff --git a/net/netfilter/nfnetlink_queue.c b/net/netfilter/nfnetlink_queue.c index c09b36755ed7..2db35f2d553d 100644 --- a/net/netfilter/nfnetlink_queue.c +++ b/net/netfilter/nfnetlink_queue.c @@ -941,23 +941,18 @@ static struct notifier_block nfqnl_dev_notifier = { .notifier_call = nfqnl_rcv_dev_event, }; -static unsigned int nfqnl_nf_hook_drop(struct net *net) +static void nfqnl_nf_hook_drop(struct net *net) { struct nfnl_queue_net *q = nfnl_queue_pernet(net); - unsigned int instances = 0; int i; for (i = 0; i < INSTANCE_BUCKETS; i++) { struct nfqnl_instance *inst; struct hlist_head *head = &q->instance_table[i]; - hlist_for_each_entry_rcu(inst, head, hlist) { + hlist_for_each_entry_rcu(inst, head, hlist) nfqnl_flush(inst, NULL, 0); - instances++; - } } - - return instances; } static int |