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kernel: generic: Fix nftables inet table breakage

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Commit b7265c59ab ("kernel: backport a series of netfilter cleanup
patches to 4.14") added patch 302-netfilter-nf_tables_inet-don-t-use-
multihook-infrast.patch.  That patch switches the netfilter core in the
kernel to use the new native NFPROTO_INET support.  Unfortunately, the
new native NFPROTO_INET support does not exist in 4.14 and was not
backported along with this patchset.  As such, nftables inet tables never
see any traffic.

As an example the following nft counter rule should increment for every
packet coming into the box, but never will:

nft add table inet foo
nft add chain inet foo bar { type filter hook input priority 0\; }
nft add rule inet foo bar counter

This commit pulls in the required backport patches to add the new
native NFPROTO_INET support, and thus restore nftables inet table
functionality.

Tested on Turris Omnia (mvebu)

Fixes: b7265c59ab ("kernel: backport a series of netfilter cleanup ...")
Signed-off-by: Brett Mastbergen <bmastbergen@untangle.com>
This commit is contained in:
Brett Mastbergen 2018-09-12 15:04:55 -04:00 committed by Hauke Mehrtens
parent d3a492c72f
commit f57806b56e
31 changed files with 1230 additions and 42 deletions
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91
target/linux/generic/backport-4.14/290-v4.16-netfilter-core-make-nf_unregister_net_hooks-simple-w.patch Normal file
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@ -0,0 +1,91 @@
From 4e645b47c4f000a503b9c90163ad905786b9bc1d Mon Sep 17 00:00:00 2001
From: Florian Westphal <fw@strlen.de>
Date: Fri, 1 Dec 2017 00:21:02 +0100
Subject: [PATCH 02/11] netfilter: core: make nf_unregister_net_hooks simple
wrapper again
This reverts commit d3ad2c17b4047
("netfilter: core: batch nf_unregister_net_hooks synchronize_net calls").
Nothing wrong with it. However, followup patch will delay freeing of hooks
with call_rcu, so all synchronize_net() calls become obsolete and there
is no need anymore for this batching.
This revert causes a temporary performance degradation when destroying
network namespace, but its resolved with the upcoming call_rcu conversion.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
net/netfilter/core.c | 59 +++-------------------------------------------------
1 file changed, 3 insertions(+), 56 deletions(-)
--- a/net/netfilter/core.c
+++ b/net/netfilter/core.c
@@ -395,63 +395,10 @@ EXPORT_SYMBOL(nf_register_net_hooks);
void nf_unregister_net_hooks(struct net *net, const struct nf_hook_ops *reg,
unsigned int hookcount)
{
- struct nf_hook_entries *to_free[16], *p;
- struct nf_hook_entries __rcu **pp;
- unsigned int i, j, n;
+ unsigned int i;
- mutex_lock(&nf_hook_mutex);
- for (i = 0; i < hookcount; i++) {
- pp = nf_hook_entry_head(net, &reg[i]);
- if (!pp)
- continue;
-
- p = nf_entry_dereference(*pp);
- if (WARN_ON_ONCE(!p))
- continue;
- __nf_unregister_net_hook(p, &reg[i]);
- }
- mutex_unlock(&nf_hook_mutex);
-
- do {
- n = min_t(unsigned int, hookcount, ARRAY_SIZE(to_free));
-
- mutex_lock(&nf_hook_mutex);
-
- for (i = 0, j = 0; i < hookcount && j < n; i++) {
- pp = nf_hook_entry_head(net, &reg[i]);
- if (!pp)
- continue;
-
- p = nf_entry_dereference(*pp);
- if (!p)
- continue;
-
- to_free[j] = __nf_hook_entries_try_shrink(pp);
- if (to_free[j])
- ++j;
- }
-
- mutex_unlock(&nf_hook_mutex);
-
- if (j) {
- unsigned int nfq;
-
- synchronize_net();
-
- /* need 2nd synchronize_net() if nfqueue is used, skb
- * can get reinjected right before nf_queue_hook_drop()
- */
- nfq = nf_queue_nf_hook_drop(net);
- if (nfq)
- synchronize_net();
-
- for (i = 0; i < j; i++)
- kvfree(to_free[i]);
- }
-
- reg += n;
- hookcount -= n;
- } while (hookcount > 0);
+ for (i = 0; i < hookcount; i++)
+ nf_unregister_net_hook(net, &reg[i]);
}
EXPORT_SYMBOL(nf_unregister_net_hooks);

116
target/linux/generic/backport-4.14/291-v4.16-netfilter-core-remove-synchronize_net-call-if-nfqueu.patch Normal file
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From 26888dfd7e7454686b8d3ea9ba5045d5f236e4d7 Mon Sep 17 00:00:00 2001
From: Florian Westphal <fw@strlen.de>
Date: Fri, 1 Dec 2017 00:21:03 +0100
Subject: [PATCH 03/11] 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>
---
include/net/netfilter/nf_queue.h | 2 +-
net/netfilter/core.c | 6 +-----
net/netfilter/nf_internals.h | 2 +-
net/netfilter/nf_queue.c | 7 ++-----
net/netfilter/nfnetlink_queue.c | 9 ++-------
5 files changed, 7 insertions(+), 19 deletions(-)
--- 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);
--- a/net/netfilter/core.c
+++ b/net/netfilter/core.c
@@ -341,7 +341,6 @@ void nf_unregister_net_hook(struct net *
{
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 *
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);
--- 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);
--- a/net/netfilter/nf_queue.c
+++ b/net/netfilter/nf_queue.c
@@ -96,18 +96,15 @@ void nf_queue_entry_get_refs(struct nf_q
}
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);
--- a/net/netfilter/nfnetlink_queue.c
+++ b/net/netfilter/nfnetlink_queue.c
@@ -941,23 +941,18 @@ static struct notifier_block nfqnl_dev_n
.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

132
target/linux/generic/backport-4.14/292-v4.16-netfilter-core-free-hooks-with-call_rcu.patch Normal file
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@ -0,0 +1,132 @@
From 8c873e2199700c2de7dbd5eedb9d90d5f109462b Mon Sep 17 00:00:00 2001
From: Florian Westphal <fw@strlen.de>
Date: Fri, 1 Dec 2017 00:21:04 +0100
Subject: [PATCH 04/11] netfilter: core: free hooks with call_rcu
Giuseppe Scrivano says:
"SELinux, if enabled, registers for each new network namespace 6
netfilter hooks."
Cost for this is high. With synchronize_net() removed:
"The net benefit on an SMP machine with two cores is that creating a
new network namespace takes -40% of the original time."
This patch replaces synchronize_net+kvfree with call_rcu().
We store rcu_head at the tail of a structure that has no fixed layout,
i.e. we cannot use offsetof() to compute the start of the original
allocation. Thus store this information right after the rcu head.
We could simplify this by just placing the rcu_head at the start
of struct nf_hook_entries. However, this structure is used in
packet processing hotpath, so only place what is needed for that
at the beginning of the struct.
Reported-by: Giuseppe Scrivano <gscrivan@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
include/linux/netfilter.h | 19 +++++++++++++++----
net/netfilter/core.c | 34 ++++++++++++++++++++++++++++------
2 files changed, 43 insertions(+), 10 deletions(-)
--- a/include/linux/netfilter.h
+++ b/include/linux/netfilter.h
@@ -77,17 +77,28 @@ struct nf_hook_entry {
void *priv;
};
+struct nf_hook_entries_rcu_head {
+ struct rcu_head head;
+ void *allocation;
+};
+
struct nf_hook_entries {
u16 num_hook_entries;
/* padding */
struct nf_hook_entry hooks[];
- /* trailer: pointers to original orig_ops of each hook.
- *
- * This is not part of struct nf_hook_entry since its only
- * needed in slow path (hook register/unregister).
+ /* trailer: pointers to original orig_ops of each hook,
+ * followed by rcu_head and scratch space used for freeing
+ * the structure via call_rcu.
*
+ * This is not part of struct nf_hook_entry since its only
+ * needed in slow path (hook register/unregister):
* const struct nf_hook_ops *orig_ops[]
+ *
+ * For the same reason, we store this at end -- its
+ * only needed when a hook is deleted, not during
+ * packet path processing:
+ * struct nf_hook_entries_rcu_head head
*/
};
--- a/net/netfilter/core.c
+++ b/net/netfilter/core.c
@@ -74,7 +74,8 @@ static struct nf_hook_entries *allocate_
struct nf_hook_entries *e;
size_t alloc = sizeof(*e) +
sizeof(struct nf_hook_entry) * num +
- sizeof(struct nf_hook_ops *) * num;
+ sizeof(struct nf_hook_ops *) * num +
+ sizeof(struct nf_hook_entries_rcu_head);
if (num == 0)
return NULL;
@@ -85,6 +86,30 @@ static struct nf_hook_entries *allocate_
return e;
}
+static void __nf_hook_entries_free(struct rcu_head *h)
+{
+ struct nf_hook_entries_rcu_head *head;
+
+ head = container_of(h, struct nf_hook_entries_rcu_head, head);
+ kvfree(head->allocation);
+}
+
+static void nf_hook_entries_free(struct nf_hook_entries *e)
+{
+ struct nf_hook_entries_rcu_head *head;
+ struct nf_hook_ops **ops;
+ unsigned int num;
+
+ if (!e)
+ return;
+
+ num = e->num_hook_entries;
+ ops = nf_hook_entries_get_hook_ops(e);
+ head = (void *)&ops[num];
+ head->allocation = e;
+ call_rcu(&head->head, __nf_hook_entries_free);
+}
+
static unsigned int accept_all(void *priv,
struct sk_buff *skb,
const struct nf_hook_state *state)
@@ -291,9 +316,8 @@ int nf_register_net_hook(struct net *net
#ifdef HAVE_JUMP_LABEL
static_key_slow_inc(&nf_hooks_needed[reg->pf][reg->hooknum]);
#endif
- synchronize_net();
BUG_ON(p == new_hooks);
- kvfree(p);
+ nf_hook_entries_free(p);
return 0;
}
EXPORT_SYMBOL(nf_register_net_hook);
@@ -361,10 +385,8 @@ void nf_unregister_net_hook(struct net *
if (!p)
return;
- synchronize_net();
-
nf_queue_nf_hook_drop(net);
- kvfree(p);
+ nf_hook_entries_free(p);
}
EXPORT_SYMBOL(nf_unregister_net_hook);

200
target/linux/generic/backport-4.14/293-v4.16-netfilter-reduce-size-of-hook-entry-point-locations.patch Normal file
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@ -0,0 +1,200 @@
From b0f38338aef2dae5ade3c16acf713737e3b15a73 Mon Sep 17 00:00:00 2001
From: Florian Westphal <fw@strlen.de>
Date: Sun, 3 Dec 2017 00:58:47 +0100
Subject: [PATCH 05/11] netfilter: reduce size of hook entry point locations
struct net contains:
struct nf_hook_entries __rcu *hooks[NFPROTO_NUMPROTO][NF_MAX_HOOKS];
which store the hook entry point locations for the various protocol
families and the hooks.
Using array results in compact c code when doing accesses, i.e.
x = rcu_dereference(net->nf.hooks[pf][hook]);
but its also wasting a lot of memory, as most families are
not used.
So split the array into those families that are used, which
are only 5 (instead of 13). In most cases, the 'pf' argument is
constant, i.e. gcc removes switch statement.
struct net before:
/* size: 5184, cachelines: 81, members: 46 */
after:
/* size: 4672, cachelines: 73, members: 46 */
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
include/linux/netfilter.h | 24 ++++++++++++++++++++++--
include/net/netns/netfilter.h | 6 +++++-
net/bridge/br_netfilter_hooks.c | 2 +-
net/netfilter/core.c | 38 ++++++++++++++++++++++++++++++--------
net/netfilter/nf_queue.c | 21 +++++++++++++++++++--
5 files changed, 77 insertions(+), 14 deletions(-)
--- a/include/linux/netfilter.h
+++ b/include/linux/netfilter.h
@@ -195,7 +195,7 @@ static inline int nf_hook(u_int8_t pf, u
struct net_device *indev, struct net_device *outdev,
int (*okfn)(struct net *, struct sock *, struct sk_buff *))
{
- struct nf_hook_entries *hook_head;
+ struct nf_hook_entries *hook_head = NULL;
int ret = 1;
#ifdef HAVE_JUMP_LABEL
@@ -206,7 +206,27 @@ static inline int nf_hook(u_int8_t pf, u
#endif
rcu_read_lock();
- hook_head = rcu_dereference(net->nf.hooks[pf][hook]);
+ switch (pf) {
+ case NFPROTO_IPV4:
+ hook_head = rcu_dereference(net->nf.hooks_ipv4[hook]);
+ break;
+ case NFPROTO_IPV6:
+ hook_head = rcu_dereference(net->nf.hooks_ipv6[hook]);
+ break;
+ case NFPROTO_ARP:
+ hook_head = rcu_dereference(net->nf.hooks_arp[hook]);
+ break;
+ case NFPROTO_BRIDGE:
+ hook_head = rcu_dereference(net->nf.hooks_bridge[hook]);
+ break;
+ case NFPROTO_DECNET:
+ hook_head = rcu_dereference(net->nf.hooks_decnet[hook]);
+ break;
+ default:
+ WARN_ON_ONCE(1);
+ break;
+ }
+
if (hook_head) {
struct nf_hook_state state;
--- a/include/net/netns/netfilter.h
+++ b/include/net/netns/netfilter.h
@@ -17,7 +17,11 @@ struct netns_nf {
#ifdef CONFIG_SYSCTL
struct ctl_table_header *nf_log_dir_header;
#endif
- struct nf_hook_entries __rcu *hooks[NFPROTO_NUMPROTO][NF_MAX_HOOKS];
+ struct nf_hook_entries __rcu *hooks_ipv4[NF_MAX_HOOKS];
+ struct nf_hook_entries __rcu *hooks_ipv6[NF_MAX_HOOKS];
+ struct nf_hook_entries __rcu *hooks_arp[NF_MAX_HOOKS];
+ struct nf_hook_entries __rcu *hooks_bridge[NF_MAX_HOOKS];
+ struct nf_hook_entries __rcu *hooks_decnet[NF_MAX_HOOKS];
#if IS_ENABLED(CONFIG_NF_DEFRAG_IPV4)
bool defrag_ipv4;
#endif
--- a/net/bridge/br_netfilter_hooks.c
+++ b/net/bridge/br_netfilter_hooks.c
@@ -991,7 +991,7 @@ int br_nf_hook_thresh(unsigned int hook,
unsigned int i;
int ret;
- e = rcu_dereference(net->nf.hooks[NFPROTO_BRIDGE][hook]);
+ e = rcu_dereference(net->nf.hooks_bridge[hook]);
if (!e)
return okfn(net, sk, skb);
--- a/net/netfilter/core.c
+++ b/net/netfilter/core.c
@@ -264,8 +264,23 @@ out_assign:
static struct nf_hook_entries __rcu **nf_hook_entry_head(struct net *net, const struct nf_hook_ops *reg)
{
- if (reg->pf != NFPROTO_NETDEV)
- return net->nf.hooks[reg->pf]+reg->hooknum;
+ switch (reg->pf) {
+ case NFPROTO_NETDEV:
+ break;
+ case NFPROTO_ARP:
+ return net->nf.hooks_arp + reg->hooknum;
+ case NFPROTO_BRIDGE:
+ return net->nf.hooks_bridge + reg->hooknum;
+ case NFPROTO_IPV4:
+ return net->nf.hooks_ipv4 + reg->hooknum;
+ case NFPROTO_IPV6:
+ return net->nf.hooks_ipv6 + reg->hooknum;
+ case NFPROTO_DECNET:
+ return net->nf.hooks_decnet + reg->hooknum;
+ default:
+ WARN_ON_ONCE(1);
+ return NULL;
+ }
#ifdef CONFIG_NETFILTER_INGRESS
if (reg->hooknum == NF_NETDEV_INGRESS) {
@@ -534,14 +549,21 @@ void (*nf_nat_decode_session_hook)(struc
EXPORT_SYMBOL(nf_nat_decode_session_hook);
#endif
-static int __net_init netfilter_net_init(struct net *net)
+static void __net_init __netfilter_net_init(struct nf_hook_entries *e[NF_MAX_HOOKS])
{
- int i, h;
+ int h;
- for (i = 0; i < ARRAY_SIZE(net->nf.hooks); i++) {
- for (h = 0; h < NF_MAX_HOOKS; h++)
- RCU_INIT_POINTER(net->nf.hooks[i][h], NULL);
- }
+ for (h = 0; h < NF_MAX_HOOKS; h++)
+ RCU_INIT_POINTER(e[h], NULL);
+}
+
+static int __net_init netfilter_net_init(struct net *net)
+{
+ __netfilter_net_init(net->nf.hooks_ipv4);
+ __netfilter_net_init(net->nf.hooks_ipv6);
+ __netfilter_net_init(net->nf.hooks_arp);
+ __netfilter_net_init(net->nf.hooks_bridge);
+ __netfilter_net_init(net->nf.hooks_decnet);
#ifdef CONFIG_PROC_FS
net->nf.proc_netfilter = proc_net_mkdir(net, "netfilter",
--- a/net/netfilter/nf_queue.c
+++ b/net/netfilter/nf_queue.c
@@ -201,6 +201,23 @@ repeat:
return NF_ACCEPT;
}
+static struct nf_hook_entries *nf_hook_entries_head(const struct net *net, u8 pf, u8 hooknum)
+{
+ switch (pf) {
+ case NFPROTO_BRIDGE:
+ return rcu_dereference(net->nf.hooks_bridge[hooknum]);
+ case NFPROTO_IPV4:
+ return rcu_dereference(net->nf.hooks_ipv4[hooknum]);
+ case NFPROTO_IPV6:
+ return rcu_dereference(net->nf.hooks_ipv6[hooknum]);
+ default:
+ WARN_ON_ONCE(1);
+ return NULL;
+ }
+
+ return NULL;
+}
+
/* Caller must hold rcu read-side lock */
void nf_reinject(struct nf_queue_entry *entry, unsigned int verdict)
{
@@ -216,12 +233,12 @@ void nf_reinject(struct nf_queue_entry *
net = entry->state.net;
pf = entry->state.pf;
- hooks = rcu_dereference(net->nf.hooks[pf][entry->state.hook]);
+ hooks = nf_hook_entries_head(net, pf, entry->state.hook);
nf_queue_entry_release_refs(entry);
i = entry->hook_index;
- if (WARN_ON_ONCE(i >= hooks->num_hook_entries)) {
+ if (WARN_ON_ONCE(!hooks || i >= hooks->num_hook_entries)) {
kfree_skb(skb);
kfree(entry);
return;

95
target/linux/generic/backport-4.14/294-v4.16-netfilter-reduce-hook-array-sizes-to-what-is-needed.patch Normal file
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@ -0,0 +1,95 @@
From ef57170bbfdd6958281011332b1fd237712f69f0 Mon Sep 17 00:00:00 2001
From: Florian Westphal <fw@strlen.de>
Date: Thu, 7 Dec 2017 16:28:24 +0100
Subject: [PATCH 06/11] netfilter: reduce hook array sizes to what is needed
Not all families share the same hook count, adjust sizes to what is
needed.
struct net before:
/* size: 6592, cachelines: 103, members: 46 */
after:
/* size: 5952, cachelines: 93, members: 46 */
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
include/net/netns/netfilter.h | 10 +++++-----
net/netfilter/core.c | 24 +++++++++++++++++-------
2 files changed, 22 insertions(+), 12 deletions(-)
--- a/include/net/netns/netfilter.h
+++ b/include/net/netns/netfilter.h
@@ -17,11 +17,11 @@ struct netns_nf {
#ifdef CONFIG_SYSCTL
struct ctl_table_header *nf_log_dir_header;
#endif
- struct nf_hook_entries __rcu *hooks_ipv4[NF_MAX_HOOKS];
- struct nf_hook_entries __rcu *hooks_ipv6[NF_MAX_HOOKS];
- struct nf_hook_entries __rcu *hooks_arp[NF_MAX_HOOKS];
- struct nf_hook_entries __rcu *hooks_bridge[NF_MAX_HOOKS];
- struct nf_hook_entries __rcu *hooks_decnet[NF_MAX_HOOKS];
+ struct nf_hook_entries __rcu *hooks_ipv4[NF_INET_NUMHOOKS];
+ struct nf_hook_entries __rcu *hooks_ipv6[NF_INET_NUMHOOKS];
+ struct nf_hook_entries __rcu *hooks_arp[NF_ARP_NUMHOOKS];
+ struct nf_hook_entries __rcu *hooks_bridge[NF_INET_NUMHOOKS];
+ struct nf_hook_entries __rcu *hooks_decnet[NF_DN_NUMHOOKS];
#if IS_ENABLED(CONFIG_NF_DEFRAG_IPV4)
bool defrag_ipv4;
#endif
--- a/net/netfilter/core.c
+++ b/net/netfilter/core.c
@@ -268,14 +268,24 @@ static struct nf_hook_entries __rcu **nf
case NFPROTO_NETDEV:
break;
case NFPROTO_ARP:
+ if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_arp) <= reg->hooknum))
+ return NULL;
return net->nf.hooks_arp + reg->hooknum;
case NFPROTO_BRIDGE:
+ if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_bridge) <= reg->hooknum))
+ return NULL;
return net->nf.hooks_bridge + reg->hooknum;
case NFPROTO_IPV4:
+ if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_ipv4) <= reg->hooknum))
+ return NULL;
return net->nf.hooks_ipv4 + reg->hooknum;
case NFPROTO_IPV6:
+ if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_ipv6) <= reg->hooknum))
+ return NULL;
return net->nf.hooks_ipv6 + reg->hooknum;
case NFPROTO_DECNET:
+ if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_decnet) <= reg->hooknum))
+ return NULL;
return net->nf.hooks_decnet + reg->hooknum;
default:
WARN_ON_ONCE(1);
@@ -549,21 +559,21 @@ void (*nf_nat_decode_session_hook)(struc
EXPORT_SYMBOL(nf_nat_decode_session_hook);
#endif
-static void __net_init __netfilter_net_init(struct nf_hook_entries *e[NF_MAX_HOOKS])
+static void __net_init __netfilter_net_init(struct nf_hook_entries **e, int max)
{
int h;
- for (h = 0; h < NF_MAX_HOOKS; h++)
+ for (h = 0; h < max; h++)
RCU_INIT_POINTER(e[h], NULL);
}
static int __net_init netfilter_net_init(struct net *net)
{
- __netfilter_net_init(net->nf.hooks_ipv4);
- __netfilter_net_init(net->nf.hooks_ipv6);
- __netfilter_net_init(net->nf.hooks_arp);
- __netfilter_net_init(net->nf.hooks_bridge);
- __netfilter_net_init(net->nf.hooks_decnet);
+ __netfilter_net_init(net->nf.hooks_ipv4, ARRAY_SIZE(net->nf.hooks_ipv4));
+ __netfilter_net_init(net->nf.hooks_ipv6, ARRAY_SIZE(net->nf.hooks_ipv6));
+ __netfilter_net_init(net->nf.hooks_arp, ARRAY_SIZE(net->nf.hooks_arp));
+ __netfilter_net_init(net->nf.hooks_bridge, ARRAY_SIZE(net->nf.hooks_bridge));
+ __netfilter_net_init(net->nf.hooks_decnet, ARRAY_SIZE(net->nf.hooks_decnet));
#ifdef CONFIG_PROC_FS
net->nf.proc_netfilter = proc_net_mkdir(net, "netfilter",

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@ -0,0 +1,67 @@
From bb4badf3a3dc81190f7c1c1fa063cdefb18df45f Mon Sep 17 00:00:00 2001
From: Florian Westphal <fw@strlen.de>
Date: Thu, 7 Dec 2017 16:28:25 +0100
Subject: [PATCH 07/11] netfilter: don't allocate space for decnet hooks unless
needed
no need to define hook points if the family isn't supported.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
include/linux/netfilter.h | 2 ++
include/net/netns/netfilter.h | 2 ++
net/netfilter/core.c | 4 ++++
3 files changed, 8 insertions(+)
--- a/include/linux/netfilter.h
+++ b/include/linux/netfilter.h
@@ -219,9 +219,11 @@ static inline int nf_hook(u_int8_t pf, u
case NFPROTO_BRIDGE:
hook_head = rcu_dereference(net->nf.hooks_bridge[hook]);
break;
+#if IS_ENABLED(CONFIG_DECNET)
case NFPROTO_DECNET:
hook_head = rcu_dereference(net->nf.hooks_decnet[hook]);
break;
+#endif
default:
WARN_ON_ONCE(1);
break;
--- a/include/net/netns/netfilter.h
+++ b/include/net/netns/netfilter.h
@@ -21,7 +21,9 @@ struct netns_nf {
struct nf_hook_entries __rcu *hooks_ipv6[NF_INET_NUMHOOKS];
struct nf_hook_entries __rcu *hooks_arp[NF_ARP_NUMHOOKS];
struct nf_hook_entries __rcu *hooks_bridge[NF_INET_NUMHOOKS];
+#if IS_ENABLED(CONFIG_DECNET)
struct nf_hook_entries __rcu *hooks_decnet[NF_DN_NUMHOOKS];
+#endif
#if IS_ENABLED(CONFIG_NF_DEFRAG_IPV4)
bool defrag_ipv4;
#endif
--- a/net/netfilter/core.c
+++ b/net/netfilter/core.c
@@ -283,10 +283,12 @@ static struct nf_hook_entries __rcu **nf
if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_ipv6) <= reg->hooknum))
return NULL;
return net->nf.hooks_ipv6 + reg->hooknum;
+#if IS_ENABLED(CONFIG_DECNET)
case NFPROTO_DECNET:
if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_decnet) <= reg->hooknum))
return NULL;
return net->nf.hooks_decnet + reg->hooknum;
+#endif
default:
WARN_ON_ONCE(1);
return NULL;
@@ -573,7 +575,9 @@ static int __net_init netfilter_net_init
__netfilter_net_init(net->nf.hooks_ipv6, ARRAY_SIZE(net->nf.hooks_ipv6));
__netfilter_net_init(net->nf.hooks_arp, ARRAY_SIZE(net->nf.hooks_arp));
__netfilter_net_init(net->nf.hooks_bridge, ARRAY_SIZE(net->nf.hooks_bridge));
+#if IS_ENABLED(CONFIG_DECNET)
__netfilter_net_init(net->nf.hooks_decnet, ARRAY_SIZE(net->nf.hooks_decnet));
+#endif
#ifdef CONFIG_PROC_FS
net->nf.proc_netfilter = proc_net_mkdir(net, "netfilter",

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@ -0,0 +1,165 @@
From 2a95183a5e0375df756efb2ca37602d71e8455f9 Mon Sep 17 00:00:00 2001
From: Florian Westphal <fw@strlen.de>
Date: Thu, 7 Dec 2017 16:28:26 +0100
Subject: [PATCH 08/11] netfilter: don't allocate space for arp/bridge hooks
unless needed
no need to define hook points if the family isn't supported.
Because we need these hooks for either nftables, arp/ebtables
or the 'call-iptables' hack we have in the bridge layer add two
new dependencies, NETFILTER_FAMILY_{ARP,BRIDGE}, and have the
users select them.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
include/linux/netfilter.h | 4 ++++
include/net/netns/netfilter.h | 4 ++++
net/Kconfig | 1 +
net/bridge/netfilter/Kconfig | 2 ++
net/ipv4/netfilter/Kconfig | 2 ++
net/netfilter/Kconfig | 6 ++++++
net/netfilter/core.c | 8 ++++++++
net/netfilter/nf_queue.c | 2 ++
8 files changed, 29 insertions(+)
--- a/include/linux/netfilter.h
+++ b/include/linux/netfilter.h
@@ -214,10 +214,14 @@ static inline int nf_hook(u_int8_t pf, u
hook_head = rcu_dereference(net->nf.hooks_ipv6[hook]);
break;
case NFPROTO_ARP:
+#ifdef CONFIG_NETFILTER_FAMILY_ARP
hook_head = rcu_dereference(net->nf.hooks_arp[hook]);
+#endif
break;
case NFPROTO_BRIDGE:
+#ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
hook_head = rcu_dereference(net->nf.hooks_bridge[hook]);
+#endif
break;
#if IS_ENABLED(CONFIG_DECNET)
case NFPROTO_DECNET:
--- a/include/net/netns/netfilter.h
+++ b/include/net/netns/netfilter.h
@@ -19,8 +19,12 @@ struct netns_nf {
#endif
struct nf_hook_entries __rcu *hooks_ipv4[NF_INET_NUMHOOKS];
struct nf_hook_entries __rcu *hooks_ipv6[NF_INET_NUMHOOKS];
+#ifdef CONFIG_NETFILTER_FAMILY_ARP
struct nf_hook_entries __rcu *hooks_arp[NF_ARP_NUMHOOKS];
+#endif
+#ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
struct nf_hook_entries __rcu *hooks_bridge[NF_INET_NUMHOOKS];
+#endif
#if IS_ENABLED(CONFIG_DECNET)
struct nf_hook_entries __rcu *hooks_decnet[NF_DN_NUMHOOKS];
#endif
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -182,6 +182,7 @@ config BRIDGE_NETFILTER
depends on BRIDGE
depends on NETFILTER && INET
depends on NETFILTER_ADVANCED
+ select NETFILTER_FAMILY_BRIDGE
default m
---help---
Enabling this option will let arptables resp. iptables see bridged
--- a/net/bridge/netfilter/Kconfig
+++ b/net/bridge/netfilter/Kconfig
@@ -4,6 +4,7 @@
#
menuconfig NF_TABLES_BRIDGE
depends on BRIDGE && NETFILTER && NF_TABLES
+ select NETFILTER_FAMILY_BRIDGE
tristate "Ethernet Bridge nf_tables support"
if NF_TABLES_BRIDGE
@@ -29,6 +30,7 @@ endif # NF_TABLES_BRIDGE
menuconfig BRIDGE_NF_EBTABLES
tristate "Ethernet Bridge tables (ebtables) support"
depends on BRIDGE && NETFILTER && NETFILTER_XTABLES
+ select NETFILTER_FAMILY_BRIDGE
help
ebtables is a general, extensible frame/packet identification
framework. Say 'Y' or 'M' here if you want to do Ethernet
--- a/net/ipv4/netfilter/Kconfig
+++ b/net/ipv4/netfilter/Kconfig
@@ -72,6 +72,7 @@ endif # NF_TABLES_IPV4
config NF_TABLES_ARP
tristate "ARP nf_tables support"
+ select NETFILTER_FAMILY_ARP
help
This option enables the ARP support for nf_tables.
@@ -392,6 +393,7 @@ endif # IP_NF_IPTABLES
config IP_NF_ARPTABLES
tristate "ARP tables support"
select NETFILTER_XTABLES
+ select NETFILTER_FAMILY_ARP
depends on NETFILTER_ADVANCED
help
arptables is a general, extensible packet identification framework.
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -12,6 +12,12 @@ config NETFILTER_INGRESS
config NETFILTER_NETLINK
tristate
+config NETFILTER_FAMILY_BRIDGE
+ bool
+
+config NETFILTER_FAMILY_ARP
+ bool
+
config NETFILTER_NETLINK_ACCT
tristate "Netfilter NFACCT over NFNETLINK interface"
depends on NETFILTER_ADVANCED
--- a/net/netfilter/core.c
+++ b/net/netfilter/core.c
@@ -267,14 +267,18 @@ static struct nf_hook_entries __rcu **nf
switch (reg->pf) {
case NFPROTO_NETDEV:
break;
+#ifdef CONFIG_NETFILTER_FAMILY_ARP
case NFPROTO_ARP:
if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_arp) <= reg->hooknum))
return NULL;
return net->nf.hooks_arp + reg->hooknum;
+#endif
+#ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
case NFPROTO_BRIDGE:
if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_bridge) <= reg->hooknum))
return NULL;
return net->nf.hooks_bridge + reg->hooknum;
+#endif
case NFPROTO_IPV4:
if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_ipv4) <= reg->hooknum))
return NULL;
@@ -573,8 +577,12 @@ static int __net_init netfilter_net_init
{
__netfilter_net_init(net->nf.hooks_ipv4, ARRAY_SIZE(net->nf.hooks_ipv4));
__netfilter_net_init(net->nf.hooks_ipv6, ARRAY_SIZE(net->nf.hooks_ipv6));
+#ifdef CONFIG_NETFILTER_FAMILY_ARP
__netfilter_net_init(net->nf.hooks_arp, ARRAY_SIZE(net->nf.hooks_arp));
+#endif
+#ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
__netfilter_net_init(net->nf.hooks_bridge, ARRAY_SIZE(net->nf.hooks_bridge));
+#endif
#if IS_ENABLED(CONFIG_DECNET)
__netfilter_net_init(net->nf.hooks_decnet, ARRAY_SIZE(net->nf.hooks_decnet));
#endif
--- a/net/netfilter/nf_queue.c
+++ b/net/netfilter/nf_queue.c
@@ -204,8 +204,10 @@ repeat:
static struct nf_hook_entries *nf_hook_entries_head(const struct net *net, u8 pf, u8 hooknum)
{
switch (pf) {
+#ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
case NFPROTO_BRIDGE:
return rcu_dereference(net->nf.hooks_bridge[hooknum]);
+#endif
case NFPROTO_IPV4:
return rcu_dereference(net->nf.hooks_ipv4[hooknum]);
case NFPROTO_IPV6:

98
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@ -0,0 +1,98 @@
From 62a0fe46e2aaba1812d3cbcae014a41539f9eb09 Mon Sep 17 00:00:00 2001
From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: Sat, 9 Dec 2017 15:23:51 +0100
Subject: [PATCH 09/11] netfilter: core: pass hook number, family and device to
nf_find_hook_list()
Instead of passing struct nf_hook_ops, this is needed by follow up
patches to handle NFPROTO_INET from the core.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
net/netfilter/core.c | 36 +++++++++++++++++++-----------------
1 file changed, 19 insertions(+), 17 deletions(-)
--- a/net/netfilter/core.c
+++ b/net/netfilter/core.c
@@ -262,36 +262,38 @@ out_assign:
return old;
}
-static struct nf_hook_entries __rcu **nf_hook_entry_head(struct net *net, const struct nf_hook_ops *reg)
+static struct nf_hook_entries __rcu **
+nf_hook_entry_head(struct net *net, int pf, unsigned int hooknum,
+ struct net_device *dev)
{
- switch (reg->pf) {
+ switch (pf) {
case NFPROTO_NETDEV:
break;
#ifdef CONFIG_NETFILTER_FAMILY_ARP
case NFPROTO_ARP:
- if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_arp) <= reg->hooknum))
+ if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_arp) <= hooknum))
return NULL;
- return net->nf.hooks_arp + reg->hooknum;
+ return net->nf.hooks_arp + hooknum;
#endif
#ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
case NFPROTO_BRIDGE:
- if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_bridge) <= reg->hooknum))
+ if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_bridge) <= hooknum))
return NULL;
- return net->nf.hooks_bridge + reg->hooknum;
+ return net->nf.hooks_bridge + hooknum;
#endif
case NFPROTO_IPV4:
- if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_ipv4) <= reg->hooknum))
+ if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_ipv4) <= hooknum))
return NULL;
- return net->nf.hooks_ipv4 + reg->hooknum;
+ return net->nf.hooks_ipv4 + hooknum;
case NFPROTO_IPV6:
- if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_ipv6) <= reg->hooknum))
+ if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_ipv6) <= hooknum))
return NULL;
- return net->nf.hooks_ipv6 + reg->hooknum;
+ return net->nf.hooks_ipv6 + hooknum;
#if IS_ENABLED(CONFIG_DECNET)
case NFPROTO_DECNET:
- if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_decnet) <= reg->hooknum))
+ if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_decnet) <= hooknum))
return NULL;
- return net->nf.hooks_decnet + reg->hooknum;
+ return net->nf.hooks_decnet + hooknum;
#endif
default:
WARN_ON_ONCE(1);
@@ -299,9 +301,9 @@ static struct nf_hook_entries __rcu **nf
}
#ifdef CONFIG_NETFILTER_INGRESS
- if (reg->hooknum == NF_NETDEV_INGRESS) {
- if (reg->dev && dev_net(reg->dev) == net)
- return &reg->dev->nf_hooks_ingress;
+ if (hooknum == NF_NETDEV_INGRESS) {
+ if (dev && dev_net(dev) == net)
+ return &dev->nf_hooks_ingress;
}
#endif
WARN_ON_ONCE(1);
@@ -323,7 +325,7 @@ int nf_register_net_hook(struct net *net
return -EINVAL;
}
- pp = nf_hook_entry_head(net, reg);
+ pp = nf_hook_entry_head(net, reg->pf, reg->hooknum, reg->dev);
if (!pp)
return -EINVAL;
@@ -397,7 +399,7 @@ void nf_unregister_net_hook(struct net *
struct nf_hook_entries __rcu **pp;
struct nf_hook_entries *p;
- pp = nf_hook_entry_head(net, reg);
+ pp = nf_hook_entry_head(net, reg->pf, reg->hooknum, reg->dev);
if (!pp)
return;

44
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@ -0,0 +1,44 @@
From 3d3cdc38e8c265a9f9d3825e823e772872bca1b8 Mon Sep 17 00:00:00 2001
From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: Sat, 9 Dec 2017 15:19:14 +0100
Subject: [PATCH 01/11] netfilter: core: add nf_remove_net_hook
Just a cleanup, __nf_unregister_net_hook() is used by a follow up patch
when handling NFPROTO_INET as a real family from the core.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
net/netfilter/core.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
--- a/net/netfilter/core.c
+++ b/net/netfilter/core.c
@@ -356,7 +356,7 @@ int nf_register_net_hook(struct net *net
EXPORT_SYMBOL(nf_register_net_hook);
/*
- * __nf_unregister_net_hook - remove a hook from blob
+ * nf_remove_net_hook - remove a hook from blob
*
* @oldp: current address of hook blob
* @unreg: hook to unregister
@@ -364,8 +364,8 @@ EXPORT_SYMBOL(nf_register_net_hook);
* This cannot fail, hook unregistration must always succeed.
* Therefore replace the to-be-removed hook with a dummy hook.
*/
-static void __nf_unregister_net_hook(struct nf_hook_entries *old,
- const struct nf_hook_ops *unreg)
+static void nf_remove_net_hook(struct nf_hook_entries *old,
+ const struct nf_hook_ops *unreg)
{
struct nf_hook_ops **orig_ops;
bool found = false;
@@ -411,7 +411,7 @@ void nf_unregister_net_hook(struct net *
return;
}
- __nf_unregister_net_hook(p, reg);
+ nf_remove_net_hook(p, reg);
p = __nf_hook_entries_try_shrink(pp);
mutex_unlock(&nf_hook_mutex);

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@ -0,0 +1,51 @@
From 30259408118f550f5969fda19c0d67020d21eda8 Mon Sep 17 00:00:00 2001
From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: Sat, 9 Dec 2017 15:26:37 +0100
Subject: [PATCH 10/11] netfilter: core: pass family as parameter to
nf_remove_net_hook()
So static_key_slow_dec applies to the family behind NFPROTO_INET.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
net/netfilter/core.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
--- a/net/netfilter/core.c
+++ b/net/netfilter/core.c
@@ -365,7 +365,7 @@ EXPORT_SYMBOL(nf_register_net_hook);
* Therefore replace the to-be-removed hook with a dummy hook.
*/
static void nf_remove_net_hook(struct nf_hook_entries *old,
- const struct nf_hook_ops *unreg)
+ const struct nf_hook_ops *unreg, int pf)
{
struct nf_hook_ops **orig_ops;
bool found = false;
@@ -383,14 +383,14 @@ static void nf_remove_net_hook(struct nf
if (found) {
#ifdef CONFIG_NETFILTER_INGRESS
- if (unreg->pf == NFPROTO_NETDEV && unreg->hooknum == NF_NETDEV_INGRESS)
+ if (pf == NFPROTO_NETDEV && unreg->hooknum == NF_NETDEV_INGRESS)
net_dec_ingress_queue();
#endif
#ifdef HAVE_JUMP_LABEL
- static_key_slow_dec(&nf_hooks_needed[unreg->pf][unreg->hooknum]);
+ static_key_slow_dec(&nf_hooks_needed[pf][unreg->hooknum]);
#endif
} else {
- WARN_ONCE(1, "hook not found, pf %d num %d", unreg->pf, unreg->hooknum);
+ WARN_ONCE(1, "hook not found, pf %d num %d", pf, unreg->hooknum);
}
}
@@ -411,7 +411,7 @@ void nf_unregister_net_hook(struct net *
return;
}
- nf_remove_net_hook(p, reg);
+ nf_remove_net_hook(p, reg, reg->pf);
p = __nf_hook_entries_try_shrink(pp);
mutex_unlock(&nf_hook_mutex);

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@ -0,0 +1,129 @@
From cb7ccd835ebb333669e400f99c650e4f3abf11c0 Mon Sep 17 00:00:00 2001
From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: Sat, 9 Dec 2017 15:30:26 +0100
Subject: [PATCH 11/11] netfilter: core: support for NFPROTO_INET hook
registration
Expand NFPROTO_INET in two hook registrations, one for NFPROTO_IPV4 and
another for NFPROTO_IPV6. Hence, we handle NFPROTO_INET from the core.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
net/netfilter/core.c | 53 +++++++++++++++++++++++++++++++++++++++++++---------
1 file changed, 44 insertions(+), 9 deletions(-)
--- a/net/netfilter/core.c
+++ b/net/netfilter/core.c
@@ -310,12 +310,13 @@ nf_hook_entry_head(struct net *net, int
return NULL;
}
-int nf_register_net_hook(struct net *net, const struct nf_hook_ops *reg)
+static int __nf_register_net_hook(struct net *net, int pf,
+ const struct nf_hook_ops *reg)
{
struct nf_hook_entries *p, *new_hooks;
struct nf_hook_entries __rcu **pp;
- if (reg->pf == NFPROTO_NETDEV) {
+ if (pf == NFPROTO_NETDEV) {
#ifndef CONFIG_NETFILTER_INGRESS
if (reg->hooknum == NF_NETDEV_INGRESS)
return -EOPNOTSUPP;
@@ -325,7 +326,7 @@ int nf_register_net_hook(struct net *net
return -EINVAL;
}
- pp = nf_hook_entry_head(net, reg->pf, reg->hooknum, reg->dev);
+ pp = nf_hook_entry_head(net, pf, reg->hooknum, reg->dev);
if (!pp)
return -EINVAL;
@@ -343,17 +344,16 @@ int nf_register_net_hook(struct net *net
hooks_validate(new_hooks);
#ifdef CONFIG_NETFILTER_INGRESS
- if (reg->pf == NFPROTO_NETDEV && reg->hooknum == NF_NETDEV_INGRESS)
+ if (pf == NFPROTO_NETDEV && reg->hooknum == NF_NETDEV_INGRESS)
net_inc_ingress_queue();
#endif
#ifdef HAVE_JUMP_LABEL
- static_key_slow_inc(&nf_hooks_needed[reg->pf][reg->hooknum]);
+ static_key_slow_inc(&nf_hooks_needed[pf][reg->hooknum]);
#endif
BUG_ON(p == new_hooks);
nf_hook_entries_free(p);
return 0;
}
-EXPORT_SYMBOL(nf_register_net_hook);
/*
* nf_remove_net_hook - remove a hook from blob
@@ -394,12 +394,13 @@ static void nf_remove_net_hook(struct nf
}
}
-void nf_unregister_net_hook(struct net *net, const struct nf_hook_ops *reg)
+void __nf_unregister_net_hook(struct net *net, int pf,
+ const struct nf_hook_ops *reg)
{
struct nf_hook_entries __rcu **pp;
struct nf_hook_entries *p;
- pp = nf_hook_entry_head(net, reg->pf, reg->hooknum, reg->dev);
+ pp = nf_hook_entry_head(net, pf, reg->hooknum, reg->dev);
if (!pp)
return;
@@ -411,7 +412,7 @@ void nf_unregister_net_hook(struct net *
return;
}
- nf_remove_net_hook(p, reg, reg->pf);
+ nf_remove_net_hook(p, reg, pf);
p = __nf_hook_entries_try_shrink(pp);
mutex_unlock(&nf_hook_mutex);
@@ -421,8 +422,42 @@ void nf_unregister_net_hook(struct net *
nf_queue_nf_hook_drop(net);
nf_hook_entries_free(p);
}
+
+void nf_unregister_net_hook(struct net *net, const struct nf_hook_ops *reg)
+{
+ if (reg->pf == NFPROTO_INET) {
+ __nf_unregister_net_hook(net, NFPROTO_IPV4, reg);
+ __nf_unregister_net_hook(net, NFPROTO_IPV6, reg);
+ } else {
+ __nf_unregister_net_hook(net, reg->pf, reg);
+ }
+}
EXPORT_SYMBOL(nf_unregister_net_hook);
+int nf_register_net_hook(struct net *net, const struct nf_hook_ops *reg)
+{
+ int err;
+
+ if (reg->pf == NFPROTO_INET) {
+ err = __nf_register_net_hook(net, NFPROTO_IPV4, reg);
+ if (err < 0)
+ return err;
+
+ err = __nf_register_net_hook(net, NFPROTO_IPV6, reg);
+ if (err < 0) {
+ __nf_unregister_net_hook(net, NFPROTO_IPV4, reg);
+ return err;
+ }
+ } else {
+ err = __nf_register_net_hook(net, reg->pf, reg);
+ if (err < 0)
+ return err;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(nf_register_net_hook);
+
int nf_register_net_hooks(struct net *net, const struct nf_hook_ops *reg,
unsigned int n)
{

2
target/linux/generic/backport-4.14/301-v4.16-netfilter-core-only-allow-one-nat-hook-per-hook-poin.patch
View file

@ -120,7 +120,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
.priority = NF_IP6_PRI_NAT_SRC,
--- a/net/netfilter/core.c
+++ b/net/netfilter/core.c
@@ -135,6 +135,12 @@ nf_hook_entries_grow(const struct nf_hoo
@@ -160,6 +160,12 @@ nf_hook_entries_grow(const struct nf_hoo
++i;
continue;
}

4
target/linux/generic/backport-4.14/304-v4.16-netfilter-move-checksum-indirection-to-struct-nf_ipv.patch
View file

@ -18,7 +18,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
--- a/include/linux/netfilter.h
+++ b/include/linux/netfilter.h
@@ -274,8 +274,6 @@ struct nf_queue_entry;
@@ -311,8 +311,6 @@ struct nf_queue_entry;
struct nf_afinfo {
unsigned short family;
@ -27,7 +27,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
__sum16 (*checksum_partial)(struct sk_buff *skb,
unsigned int hook,
unsigned int dataoff,
@@ -296,20 +294,9 @@ static inline const struct nf_afinfo *nf
@@ -333,20 +331,9 @@ static inline const struct nf_afinfo *nf
return rcu_dereference(nf_afinfo[family]);
}

4
target/linux/generic/backport-4.14/305-v4.16-netfilter-move-checksum_partial-indirection-to-struc.patch
View file

@ -18,7 +18,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
--- a/include/linux/netfilter.h
+++ b/include/linux/netfilter.h
@@ -274,11 +274,6 @@ struct nf_queue_entry;
@@ -311,11 +311,6 @@ struct nf_queue_entry;
struct nf_afinfo {
unsigned short family;
@ -30,7 +30,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
int (*route)(struct net *net, struct dst_entry **dst,
struct flowi *fl, bool strict);
void (*saveroute)(const struct sk_buff *skb,
@@ -298,22 +293,9 @@ __sum16 nf_checksum(struct sk_buff *skb,
@@ -335,22 +330,9 @@ __sum16 nf_checksum(struct sk_buff *skb,
unsigned int dataoff, u_int8_t protocol,
unsigned short family);

6
target/linux/generic/backport-4.14/306-v4.16-netfilter-remove-saveroute-indirection-in-struct-nf_.patch
View file

@ -11,7 +11,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
--- a/include/linux/netfilter.h
+++ b/include/linux/netfilter.h
@@ -276,8 +276,6 @@ struct nf_afinfo {
@@ -313,8 +313,6 @@ struct nf_afinfo {
unsigned short family;
int (*route)(struct net *net, struct dst_entry **dst,
struct flowi *fl, bool strict);
@ -176,7 +176,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
#include <linux/netfilter_bridge.h>
#include <linux/seq_file.h>
#include <linux/rcupdate.h>
@@ -111,6 +113,35 @@ unsigned int nf_queue_nf_hook_drop(struc
@@ -108,6 +110,35 @@ void nf_queue_nf_hook_drop(struct net *n
}
EXPORT_SYMBOL_GPL(nf_queue_nf_hook_drop);
@ -212,7 +212,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
static int __nf_queue(struct sk_buff *skb, const struct nf_hook_state *state,
const struct nf_hook_entries *entries,
unsigned int index, unsigned int queuenum)
@@ -147,7 +178,16 @@ static int __nf_queue(struct sk_buff *sk
@@ -144,7 +175,16 @@ static int __nf_queue(struct sk_buff *sk
nf_queue_entry_get_refs(entry);
skb_dst_force(skb);

4
target/linux/generic/backport-4.14/307-v4.16-netfilter-move-route-indirection-to-struct-nf_ipv6_o.patch
View file

@ -17,7 +17,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
--- a/include/linux/netfilter.h
+++ b/include/linux/netfilter.h
@@ -274,8 +274,6 @@ struct nf_queue_entry;
@@ -311,8 +311,6 @@ struct nf_queue_entry;
struct nf_afinfo {
unsigned short family;
@ -26,7 +26,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
int (*reroute)(struct net *net, struct sk_buff *skb,
const struct nf_queue_entry *entry);
int route_key_size;
@@ -294,6 +292,8 @@ __sum16 nf_checksum(struct sk_buff *skb,
@@ -331,6 +329,8 @@ __sum16 nf_checksum(struct sk_buff *skb,
__sum16 nf_checksum_partial(struct sk_buff *skb, unsigned int hook,
unsigned int dataoff, unsigned int len,
u_int8_t protocol, unsigned short family);

8
target/linux/generic/backport-4.14/308-v4.16-netfilter-move-reroute-indirection-to-struct-nf_ipv6.patch
View file

@ -17,7 +17,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
--- a/include/linux/netfilter.h
+++ b/include/linux/netfilter.h
@@ -274,8 +274,6 @@ struct nf_queue_entry;
@@ -311,8 +311,6 @@ struct nf_queue_entry;
struct nf_afinfo {
unsigned short family;
@ -26,7 +26,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
int route_key_size;
};
@@ -294,6 +292,7 @@ __sum16 nf_checksum_partial(struct sk_bu
@@ -331,6 +329,7 @@ __sum16 nf_checksum_partial(struct sk_bu
u_int8_t protocol, unsigned short family);
int nf_route(struct net *net, struct dst_entry **dst, struct flowi *fl,
bool strict, unsigned short family);
@ -171,7 +171,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
--- a/net/netfilter/nf_queue.c
+++ b/net/netfilter/nf_queue.c
@@ -250,7 +250,6 @@ void nf_reinject(struct nf_queue_entry *
@@ -266,7 +266,6 @@ void nf_reinject(struct nf_queue_entry *
const struct nf_hook_entry *hook_entry;
const struct nf_hook_entries *hooks;
struct sk_buff *skb = entry->skb;
@ -179,7 +179,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
const struct net *net;
unsigned int i;
int err;
@@ -277,8 +276,7 @@ void nf_reinject(struct nf_queue_entry *
@@ -293,8 +292,7 @@ void nf_reinject(struct nf_queue_entry *
verdict = nf_hook_entry_hookfn(hook_entry, skb, &entry->state);
if (verdict == NF_ACCEPT) {

8
target/linux/generic/backport-4.14/309-v4.16-netfilter-remove-route_key_size-field-in-struct-nf_a.patch
View file

@ -9,7 +9,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
--- a/include/linux/netfilter.h
+++ b/include/linux/netfilter.h
@@ -274,7 +274,6 @@ struct nf_queue_entry;
@@ -311,7 +311,6 @@ struct nf_queue_entry;
struct nf_afinfo {
unsigned short family;
@ -48,7 +48,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
#include <net/protocol.h>
#include <net/netfilter/nf_queue.h>
#include <net/dst.h>
@@ -148,9 +150,9 @@ static int __nf_queue(struct sk_buff *sk
@@ -145,9 +147,9 @@ static int __nf_queue(struct sk_buff *sk
{
int status = -ENOENT;
struct nf_queue_entry *entry = NULL;
@ -59,7 +59,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
/* QUEUE == DROP if no one is waiting, to be safe. */
qh = rcu_dereference(net->nf.queue_handler);
@@ -159,11 +161,19 @@ static int __nf_queue(struct sk_buff *sk
@@ -156,11 +158,19 @@ static int __nf_queue(struct sk_buff *sk
goto err;
}
@ -83,7 +83,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
if (!entry) {
status = -ENOMEM;
goto err;
@@ -173,7 +183,7 @@ static int __nf_queue(struct sk_buff *sk
@@ -170,7 +180,7 @@ static int __nf_queue(struct sk_buff *sk
.skb = skb,
.state = *state,
.hook_index = index,

4
target/linux/generic/backport-4.14/310-v4.16-netfilter-remove-struct-nf_afinfo-and-its-helper-fun.patch
View file

@ -12,7 +12,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
--- a/include/linux/netfilter.h
+++ b/include/linux/netfilter.h
@@ -272,16 +272,6 @@ int skb_make_writable(struct sk_buff *sk
@@ -309,16 +309,6 @@ int skb_make_writable(struct sk_buff *sk
struct flowi;
struct nf_queue_entry;
@ -29,7 +29,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
__sum16 nf_checksum(struct sk_buff *skb, unsigned int hook,
unsigned int dataoff, u_int8_t protocol,
unsigned short family);
@@ -293,9 +283,6 @@ int nf_route(struct net *net, struct dst
@@ -330,9 +320,6 @@ int nf_route(struct net *net, struct dst
bool strict, unsigned short family);
int nf_reroute(struct sk_buff *skb, struct nf_queue_entry *entry);

2
target/linux/generic/backport-4.14/322-v4.16-netfilter-add-generic-flow-table-infrastructure.patch
View file

@ -126,7 +126,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
#endif /* _FLOW_OFFLOAD_H */
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -661,6 +661,13 @@ endif # NF_TABLES_NETDEV
@@ -667,6 +667,13 @@ endif # NF_TABLES_NETDEV
endif # NF_TABLES

2
target/linux/generic/backport-4.14/323-v4.16-netfilter-flow-table-support-for-IPv4.patch
View file

@ -19,7 +19,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
--- a/net/ipv4/netfilter/Kconfig
+++ b/net/ipv4/netfilter/Kconfig
@@ -77,6 +77,14 @@ config NF_TABLES_ARP
@@ -78,6 +78,14 @@ config NF_TABLES_ARP
endif # NF_TABLES

2
target/linux/generic/backport-4.14/325-v4.16-netfilter-flow-table-support-for-the-mixed-IPv4-IPv6.patch
View file

@ -63,7 +63,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
.family = NFPROTO_IPV6,
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -661,6 +661,14 @@ endif # NF_TABLES_NETDEV
@@ -667,6 +667,14 @@ endif # NF_TABLES_NETDEV
endif # NF_TABLES

2
target/linux/generic/backport-4.14/326-v4.16-netfilter-nf_tables-flow-offload-expression.patch
View file

@ -39,7 +39,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
NFT_LIMIT_PKT_BYTES
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -509,6 +509,13 @@ config NFT_CT
@@ -515,6 +515,13 @@ config NFT_CT
This option adds the "ct" expression that you can use to match
connection tracking information such as the flow state.

6
target/linux/generic/backport-4.14/329-v4.16-netfilter-improve-flow-table-Kconfig-dependencies.patch
View file

@ -59,7 +59,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
--- a/net/ipv4/netfilter/Kconfig
+++ b/net/ipv4/netfilter/Kconfig
@@ -78,8 +78,9 @@ config NF_TABLES_ARP
@@ -79,8 +79,9 @@ config NF_TABLES_ARP
endif # NF_TABLES
config NF_FLOW_TABLE_IPV4
@ -85,7 +85,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -669,8 +669,9 @@ endif # NF_TABLES_NETDEV
@@ -675,8 +675,9 @@ endif # NF_TABLES_NETDEV
endif # NF_TABLES
config NF_FLOW_TABLE_INET
@ -96,7 +96,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
help
This option adds the flow table mixed IPv4/IPv6 support.
@@ -678,6 +679,7 @@ config NF_FLOW_TABLE_INET
@@ -684,6 +685,7 @@ config NF_FLOW_TABLE_INET
config NF_FLOW_TABLE
tristate "Netfilter flow table module"

2
target/linux/generic/backport-4.14/336-v4.15-netfilter-exit_net-cleanup-check-added.patch
View file

@ -62,7 +62,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
static struct pernet_operations nfnl_log_net_ops = {
--- a/net/netfilter/nfnetlink_queue.c
+++ b/net/netfilter/nfnetlink_queue.c
@@ -1515,10 +1515,15 @@ static int __net_init nfnl_queue_net_ini
@@ -1510,10 +1510,15 @@ static int __net_init nfnl_queue_net_ini
static void __net_exit nfnl_queue_net_exit(struct net *net)
{

6
target/linux/generic/backport-4.14/346-v4.16-netfilter-flowtable-infrastructure-depends-on-NETFIL.patch
View file

@ -25,7 +25,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
--- a/net/ipv4/netfilter/Kconfig
+++ b/net/ipv4/netfilter/Kconfig
@@ -79,8 +79,7 @@ endif # NF_TABLES
@@ -80,8 +80,7 @@ endif # NF_TABLES
config NF_FLOW_TABLE_IPV4
tristate "Netfilter flow table IPv4 module"
@ -49,7 +49,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -670,8 +670,8 @@ endif # NF_TABLES
@@ -676,8 +676,8 @@ endif # NF_TABLES
config NF_FLOW_TABLE_INET
tristate "Netfilter flow table mixed IPv4/IPv6 module"
@ -60,7 +60,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
help
This option adds the flow table mixed IPv4/IPv6 support.
@@ -679,7 +679,9 @@ config NF_FLOW_TABLE_INET
@@ -685,7 +685,9 @@ config NF_FLOW_TABLE_INET
config NF_FLOW_TABLE
tristate "Netfilter flow table module"

2
target/linux/generic/backport-4.14/356-v4.18-netfilter-nf_flow_table-relax-mixed-ipv4-ipv6-flowta.patch
View file

@ -11,7 +11,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -670,8 +670,7 @@ endif # NF_TABLES
@@ -676,8 +676,7 @@ endif # NF_TABLES
config NF_FLOW_TABLE_INET
tristate "Netfilter flow table mixed IPv4/IPv6 module"

4
target/linux/generic/hack-4.14/250-netfilter_depends.patch
View file

@ -9,7 +9,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -223,7 +223,6 @@ config NF_CONNTRACK_FTP
@@ -229,7 +229,6 @@ config NF_CONNTRACK_FTP
config NF_CONNTRACK_H323
tristate "H.323 protocol support"
@ -17,7 +17,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
depends on NETFILTER_ADVANCED
help
H.323 is a VoIP signalling protocol from ITU-T. As one of the most
@@ -1046,7 +1045,6 @@ config NETFILTER_XT_TARGET_SECMARK
@@ -1052,7 +1051,6 @@ config NETFILTER_XT_TARGET_SECMARK
config NETFILTER_XT_TARGET_TCPMSS
tristate '"TCPMSS" target support'

4
target/linux/generic/hack-4.14/251-sound_kconfig.patch
View file

@ -122,8 +122,8 @@ Signed-off-by: John Crispin <john@phrozen.org>
- tristate
+ tristate "Netfilter NFNETLINK interface"
config NETFILTER_NETLINK_ACCT
tristate "Netfilter NFACCT over NFNETLINK interface"
config NETFILTER_FAMILY_BRIDGE
bool
--- a/net/wireless/Kconfig
+++ b/net/wireless/Kconfig
@@ -1,5 +1,5 @@

10
target/linux/generic/hack-4.14/650-netfilter-add-xt_OFFLOAD-target.patch
View file

@ -8,7 +8,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
--- a/net/ipv4/netfilter/Kconfig
+++ b/net/ipv4/netfilter/Kconfig
@@ -75,8 +75,6 @@ config NF_TABLES_ARP
@@ -76,8 +76,6 @@ config NF_TABLES_ARP
help
This option enables the ARP support for nf_tables.
@ -17,7 +17,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
config NF_FLOW_TABLE_IPV4
tristate "Netfilter flow table IPv4 module"
depends on NF_FLOW_TABLE
@@ -85,6 +83,8 @@ config NF_FLOW_TABLE_IPV4
@@ -86,6 +84,8 @@ config NF_FLOW_TABLE_IPV4
To compile it as a module, choose M here.
@ -47,7 +47,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
depends on !NF_CONNTRACK || NF_CONNTRACK
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -665,8 +665,6 @@ config NFT_FIB_NETDEV
@@ -671,8 +671,6 @@ config NFT_FIB_NETDEV
endif # NF_TABLES_NETDEV
@ -56,7 +56,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
config NF_FLOW_TABLE_INET
tristate "Netfilter flow table mixed IPv4/IPv6 module"
depends on NF_FLOW_TABLE
@@ -675,11 +673,12 @@ config NF_FLOW_TABLE_INET
@@ -681,11 +679,12 @@ config NF_FLOW_TABLE_INET
To compile it as a module, choose M here.
@ -70,7 +70,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
help
This option adds the flow table core infrastructure.
@@ -968,6 +967,15 @@ config NETFILTER_XT_TARGET_NOTRACK
@@ -974,6 +973,15 @@ config NETFILTER_XT_TARGET_NOTRACK
depends on NETFILTER_ADVANCED
select NETFILTER_XT_TARGET_CT

2
target/linux/generic/pending-4.14/640-netfilter-nf_flow_table-add-hardware-offload-support.patch
View file

@ -128,7 +128,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
#define NFTA_FLOWTABLE_MAX (__NFTA_FLOWTABLE_MAX - 1)
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -686,6 +686,15 @@ config NF_FLOW_TABLE
@@ -692,6 +692,15 @@ config NF_FLOW_TABLE
To compile it as a module, choose M here.