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kernel: fold xt_FLOWOFFLOAD fixes into the main patch

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Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau 2019-01-31 18:26:30 +01:00
parent 33b690216e
commit 945bcaf6ec
3 changed files with 37 additions and 144 deletions
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39
target/linux/generic/hack-4.14/650-netfilter-add-xt_OFFLOAD-target.patch
View File

@ -98,7 +98,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
obj-$(CONFIG_NETFILTER_XT_TARGET_LED) += xt_LED.o
--- /dev/null
+++ b/net/netfilter/xt_FLOWOFFLOAD.c
@@ -0,0 +1,368 @@
@@ -0,0 +1,403 @@
+/*
+ * Copyright (C) 2018 Felix Fietkau <nbd@nbd.name>
+ *
@ -113,6 +113,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+#include <net/ip.h>
+#include <net/netfilter/nf_conntrack.h>
+#include <net/netfilter/nf_flow_table.h>
+#include <net/netfilter/nf_conntrack_helper.h>
+
+static struct nf_flowtable nf_flowtable;
+static HLIST_HEAD(hooks);
@ -346,6 +347,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+ struct nf_flow_route route;
+ struct flow_offload *flow;
+ struct nf_conn *ct;
+ const struct nf_conn_help *help;
+
+ if (xt_flowoffload_skip(skb))
+ return XT_CONTINUE;
@ -365,7 +367,8 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+ return XT_CONTINUE;
+ }
+
+ if (test_bit(IPS_HELPER_BIT, &ct->status))
+ help = nfct_help(ct);
+ if (help)
+ return XT_CONTINUE;
+
+ if (ctinfo == IP_CT_NEW ||
@ -441,10 +444,41 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+ nf_flow_table_free(table);
+}
+
+static int flow_offload_netdev_event(struct notifier_block *this,
+ unsigned long event, void *ptr)
+{
+ struct xt_flowoffload_hook *hook = NULL;
+ struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+
+ if (event != NETDEV_UNREGISTER)
+ return NOTIFY_DONE;
+
+ spin_lock_bh(&hooks_lock);
+ hook = flow_offload_lookup_hook(dev);
+ if (hook) {
+ hlist_del(&hook->list);
+ }
+ spin_unlock_bh(&hooks_lock);
+ if (hook) {
+ nf_unregister_net_hook(hook->net, &hook->ops);
+ kfree(hook);
+ }
+
+ nf_flow_table_cleanup(dev_net(dev), dev);
+
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block flow_offload_netdev_notifier = {
+ .notifier_call = flow_offload_netdev_event,
+};
+
+static int __init xt_flowoffload_tg_init(void)
+{
+ int ret;
+
+ register_netdevice_notifier(&flow_offload_netdev_notifier);
+
+ INIT_DELAYED_WORK(&hook_work, xt_flowoffload_hook_work);
+
+ ret = xt_flowoffload_table_init(&nf_flowtable);
@ -462,6 +496,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+{
+ xt_unregister_target(&offload_tg_reg);
+ xt_flowoffload_table_cleanup(&nf_flowtable);
+ unregister_netdevice_notifier(&flow_offload_netdev_notifier);
+}
+
+MODULE_LICENSE("GPL");

91
target/linux/generic/hack-4.14/940-cleanup-offload-hooks-on-netdev-unregister.patch
View File

@ -1,91 +0,0 @@
From ae56e27e30122f82d244f9eb35fcab8fa60e0d31 Mon Sep 17 00:00:00 2001
From: Chen Minqiang <ptpt52@gmail.com>
Date: Sun, 29 Apr 2018 14:08:57 +0800
Subject: [PATCH] cleanup offload hooks on netdev unregister
This should fix crashdump on reboot when FLOWOFFLOAD enabled
kmsg:
[ 84.188081] Workqueue: events_power_efficient xt_flowoffload_hook_work [xt_FLOWOFFLOAD]
[ 84.209326] task: ffff88000ecd0c80 task.stack: ffffc90000068000
[ 84.224706] RIP: 0010:__nf_unregister_net_hook+0x1/0x90
[ 84.242911] RSP: 0018:ffffc9000006be30 EFLAGS: 00010202
[ 84.257405] RAX: 0000000000000000 RBX: ffff88000c5b3228 RCX: 0000000100170001
[ 84.292175] RDX: ffff88000ecd0c80 RSI: ffff88000c5b3228 RDI: 6b6b6b6b6b6b6b6b
[ 84.305095] RBP: ffffc9000006be58 R08: ffff88000c5b3578 R09: ffff88000c5b3538
[ 84.325980] R10: ffffc9000006be50 R11: ffff88000fc1f310 R12: ffffffff81e6c580
[ 84.396514] R13: ffff88000d1723d0 R14: ffff88000ec0fc00 R15: 0000000000000000
[ 84.459500] FS: 0000000000000000(0000) GS:ffff88000fc00000(0000) knlGS:0000000000000000
[ 84.525121] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 84.565460] CR2: 0000000000a931d8 CR3: 0000000001e08006 CR4: 00000000000606f0
[ 84.638311] Call Trace:
[ 84.655229] ? nf_unregister_net_hook+0x88/0xd0
[ 84.706898] xt_flowoffload_hook_work+0x12a/0x17a [xt_FLOWOFFLOAD]
[ 84.765504] process_one_work+0x1c4/0x310
[ 84.799558] worker_thread+0x20b/0x3c0
[ 84.850119] kthread+0x112/0x120
[ 84.884839] ? process_one_work+0x310/0x310
[ 84.923571] ? kthread_create_on_node+0x40/0x40
[ 84.966100] ret_from_fork+0x35/0x40
[ 84.981738] Code: 41 5c 41 5d 41 5e 41 5f 5d c3 48 8b 05 c1 f1 99 00 55 48 89 e5 48 85 c0 75 02 0f 0b e8 b9 f6 30 00 5d c3 0f 1f 80 00 00 00 00 55 <0f> b7 0f 48 89 e5 48 89 c8 48 c1 e0 04 48 8d 54 07 08 31 c0 eb
[ 85.100453] RIP: __nf_unregister_net_hook+0x1/0x90 RSP: ffffc9000006be30
[ 85.111658] ---[ end trace 5c25a390045cac75 ]---
[ 85.124535] Kernel panic - not syncing: Fatal exception
Signed-off-by: Chen Minqiang <ptpt52@gmail.com>
---
net/netfilter/xt_FLOWOFFLOAD.c | 32 ++++++++++++++++++++++++++++++++
1 file changed, 32 insertions(+)
--- a/net/netfilter/xt_FLOWOFFLOAD.c
+++ b/net/netfilter/xt_FLOWOFFLOAD.c
@@ -340,10 +340,41 @@ static void xt_flowoffload_table_cleanup
nf_flow_table_free(table);
}
+static int flow_offload_netdev_event(struct notifier_block *this,
+ unsigned long event, void *ptr)
+{
+ struct xt_flowoffload_hook *hook = NULL;
+ struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+
+ if (event != NETDEV_UNREGISTER)
+ return NOTIFY_DONE;
+
+ spin_lock_bh(&hooks_lock);
+ hook = flow_offload_lookup_hook(dev);
+ if (hook) {
+ hlist_del(&hook->list);
+ }
+ spin_unlock_bh(&hooks_lock);
+ if (hook) {
+ nf_unregister_net_hook(hook->net, &hook->ops);
+ kfree(hook);
+ }
+
+ nf_flow_table_cleanup(dev_net(dev), dev);
+
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block flow_offload_netdev_notifier = {
+ .notifier_call = flow_offload_netdev_event,
+};
+
static int __init xt_flowoffload_tg_init(void)
{
int ret;
+ register_netdevice_notifier(&flow_offload_netdev_notifier);
+
INIT_DELAYED_WORK(&hook_work, xt_flowoffload_hook_work);
ret = xt_flowoffload_table_init(&nf_flowtable);
@@ -361,6 +392,7 @@ static void __exit xt_flowoffload_tg_exi
{
xt_unregister_target(&offload_tg_reg);
xt_flowoffload_table_cleanup(&nf_flowtable);
+ unregister_netdevice_notifier(&flow_offload_netdev_notifier);
}
MODULE_LICENSE("GPL");

51
target/linux/generic/hack-4.14/941-fix-checking-method-of-conntrack-helper.patch
View File

@ -1,51 +0,0 @@
From addf8974ce9987e2946e04624fe806a98390786e Mon Sep 17 00:00:00 2001
From: HsiuWen Yen <y.hsiuwen@gmail.com>
Date: Wed, 30 Jan 2019 11:45:25 +0800
Subject: [PATCH] fix checking method of conntrack helper
This patch uses nfct_help() to detect whether an established connection
needs conntrack helper instead of using test_bit(IPS_HELPER_BIT,
&ct->status).
The reason for this modification is that IPS_HELPER_BIT is only set when
the conntrack helper is attached by explicit CT target.
However, in the case that a device enables conntrack helper via the other
ways (e.g., command "echo 1 > /proc/sys/net/netfilter/nf_conntrack_helper")
, the status of IPS_HELPER_BIT will not present any change. That means the
IPS_HELPER_BIT might lose the checking ability in the context.
Signed-off-by: HsiuWen Yen <y.hsiuwen@gmail.com>
---
net/netfilter/xt_FLOWOFFLOAD.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
--- a/net/netfilter/xt_FLOWOFFLOAD.c
+++ b/net/netfilter/xt_FLOWOFFLOAD.c
@@ -12,6 +12,7 @@
#include <net/ip.h>
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_flow_table.h>
+#include <net/netfilter/nf_conntrack_helper.h>
static struct nf_flowtable nf_flowtable;
static HLIST_HEAD(hooks);
@@ -245,6 +246,7 @@ flowoffload_tg(struct sk_buff *skb, const struct xt_action_param *par)
struct nf_flow_route route;
struct flow_offload *flow;
struct nf_conn *ct;
+ const struct nf_conn_help *help;
if (xt_flowoffload_skip(skb))
return XT_CONTINUE;
@@ -264,7 +266,8 @@ flowoffload_tg(struct sk_buff *skb, const struct xt_action_param *par)
return XT_CONTINUE;
}
- if (test_bit(IPS_HELPER_BIT, &ct->status))
+ help = nfct_help(ct);
+ if (help)
return XT_CONTINUE;
if (ctinfo == IP_CT_NEW ||