From: kan.liang@intel.com
To: davem@davemloft.net, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org
Cc: jeffrey.t.kirsher@intel.com, mingo@redhat.com,
peterz@infradead.org, kuznet@ms2.inr.ac.ru, jmorris@namei.org,
yoshfuji@linux-ipv6.org, kaber@trash.net,
akpm@linux-foundation.org, keescook@chromium.org,
viro@zeniv.linux.org.uk, gorcunov@openvz.org,
john.stultz@linaro.org, aduyck@mirantis.com, ben@decadent.org.uk,
decot@googlers.com, fw@strlen.de, alexander.duyck@gmail.com,
daniel@iogearbox.net, tom@herbertland.com, rdunlap@infradead.org,
xiyou.wangcong@gmail.com, hannes@stressinduktion.org,
stephen@networkplumber.org, alexei.starovoitov@gmail.com,
jesse.brandeburg@intel.com, andi@firstfloor.org,
Kan Liang <kan.liang@intel.com>
Subject: [RFC V3 PATCH 12/26] net/netpolicy: NET device hotplug
Date: Mon, 12 Sep 2016 07:55:45 -0700 [thread overview]
Message-ID: <1473692159-4017-13-git-send-email-kan.liang@intel.com> (raw)
In-Reply-To: <1473692159-4017-1-git-send-email-kan.liang@intel.com>
From: Kan Liang <kan.liang@intel.com>
Support NET device up/down/namechange in the NET policy code.
Signed-off-by: Kan Liang <kan.liang@intel.com>
---
net/core/netpolicy.c | 66 +++++++++++++++++++++++++++++++++++++++++++++-------
1 file changed, 58 insertions(+), 8 deletions(-)
diff --git a/net/core/netpolicy.c b/net/core/netpolicy.c
index f56beca..271ecc3 100644
--- a/net/core/netpolicy.c
+++ b/net/core/netpolicy.c
@@ -688,6 +688,9 @@ static const struct file_operations proc_net_policy_operations = {
static int netpolicy_proc_dev_init(struct net *net, struct net_device *dev)
{
+ if (dev->proc_dev)
+ proc_remove(dev->proc_dev);
+
dev->proc_dev = proc_net_mkdir(net, dev->name, net->proc_netpolicy);
if (!dev->proc_dev)
return -ENOMEM;
@@ -754,6 +757,19 @@ void uninit_netpolicy(struct net_device *dev)
spin_unlock(&dev->np_lock);
}
+static void netpolicy_dev_init(struct net *net,
+ struct net_device *dev)
+{
+ if (!init_netpolicy(dev)) {
+#ifdef CONFIG_PROC_FS
+ if (netpolicy_proc_dev_init(net, dev))
+ uninit_netpolicy(dev);
+ else
+#endif /* CONFIG_PROC_FS */
+ pr_info("NETPOLICY: Init net policy for %s\n", dev->name);
+ }
+}
+
static int __net_init netpolicy_net_init(struct net *net)
{
struct net_device *dev, *aux;
@@ -767,14 +783,7 @@ static int __net_init netpolicy_net_init(struct net *net)
rtnl_lock();
for_each_netdev_safe(net, dev, aux) {
- if (!init_netpolicy(dev)) {
-#ifdef CONFIG_PROC_FS
- if (netpolicy_proc_dev_init(net, dev))
- uninit_netpolicy(dev);
- else
-#endif /* CONFIG_PROC_FS */
- pr_info("NETPOLICY: Init net policy for %s\n", dev->name);
- }
+ netpolicy_dev_init(net, dev);
}
rtnl_unlock();
@@ -799,17 +808,58 @@ static struct pernet_operations netpolicy_net_ops = {
.exit = netpolicy_net_exit,
};
+static int netpolicy_notify(struct notifier_block *this,
+ unsigned long event,
+ void *ptr)
+{
+ struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+
+ switch (event) {
+ case NETDEV_CHANGENAME:
+#ifdef CONFIG_PROC_FS
+ if (dev->proc_dev) {
+ proc_remove(dev->proc_dev);
+ if ((netpolicy_proc_dev_init(dev_net(dev), dev) < 0) &&
+ dev->proc_dev) {
+ proc_remove(dev->proc_dev);
+ dev->proc_dev = NULL;
+ }
+ }
+#endif
+ break;
+ case NETDEV_UP:
+ netpolicy_dev_init(dev_net(dev), dev);
+ break;
+ case NETDEV_GOING_DOWN:
+ uninit_netpolicy(dev);
+#ifdef CONFIG_PROC_FS
+ proc_remove(dev->proc_dev);
+ dev->proc_dev = NULL;
+#endif
+ break;
+ }
+
+ return NOTIFY_OK;
+}
+
+static struct notifier_block netpolicy_dev_notf = {
+ .notifier_call = netpolicy_notify,
+};
+
static int __init netpolicy_init(void)
{
int ret;
ret = register_pernet_subsys(&netpolicy_net_ops);
+ if (!ret)
+ register_netdevice_notifier(&netpolicy_dev_notf);
return ret;
}
static void __exit netpolicy_exit(void)
{
+ unregister_netdevice_notifier(&netpolicy_dev_notf);
unregister_pernet_subsys(&netpolicy_net_ops);
}
--
2.5.5
next prev parent reply other threads:[~2016-09-12 14:56 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-12 14:55 [RFC V3 PATCH 00/26] Kernel NET policy kan.liang
2016-09-12 14:55 ` [RFC V3 PATCH 01/26] net: introduce " kan.liang
2016-09-12 14:55 ` [RFC V3 PATCH 02/26] net/netpolicy: init " kan.liang
2016-09-12 14:55 ` [RFC V3 PATCH 03/26] net/netpolicy: get device queue irq information kan.liang
2016-09-12 16:48 ` Sergei Shtylyov
2016-09-13 12:23 ` Liang, Kan
2016-09-13 13:14 ` Alexander Duyck
2016-09-13 13:22 ` Liang, Kan
2016-09-12 14:55 ` [RFC V3 PATCH 04/26] net/netpolicy: get CPU information kan.liang
2016-09-12 14:55 ` [RFC V3 PATCH 05/26] net/netpolicy: create CPU and queue mapping kan.liang
2016-09-12 14:55 ` [RFC V3 PATCH 06/26] net/netpolicy: set and remove IRQ affinity kan.liang
2016-09-12 14:55 ` [RFC V3 PATCH 07/26] net/netpolicy: enable and disable NET policy kan.liang
2016-09-12 14:55 ` [RFC V3 PATCH 08/26] net/netpolicy: introduce NET policy object kan.liang
2016-09-12 14:55 ` [RFC V3 PATCH 09/26] net/netpolicy: set NET policy by policy name kan.liang
2016-09-12 14:55 ` [RFC V3 PATCH 10/26] net/netpolicy: add three new NET policies kan.liang
2016-09-12 14:55 ` [RFC V3 PATCH 11/26] net/netpolicy: add MIX policy kan.liang
2016-09-12 14:55 ` kan.liang [this message]
2016-09-12 14:55 ` [RFC V3 PATCH 13/26] net/netpolicy: support CPU hotplug kan.liang
2016-09-12 14:55 ` [RFC V3 PATCH 14/26] net/netpolicy: handle channel changes kan.liang
2016-09-12 14:55 ` [RFC V3 PATCH 15/26] net/netpolicy: implement netpolicy register kan.liang
2016-09-12 14:55 ` [RFC V3 PATCH 16/26] net/netpolicy: introduce per socket netpolicy kan.liang
2016-09-12 14:55 ` [RFC V3 PATCH 17/26] net/netpolicy: introduce netpolicy_pick_queue kan.liang
2016-09-12 14:55 ` [RFC V3 PATCH 18/26] net/netpolicy: set tx queues according to policy kan.liang
2016-09-12 20:23 ` Tom Herbert
2016-09-13 12:22 ` Liang, Kan
2016-09-12 14:55 ` [RFC V3 PATCH 19/26] net/netpolicy: tc bpf extension to pick Tx queue kan.liang
2016-09-12 14:55 ` [RFC V3 PATCH 20/26] net/netpolicy: set Rx queues according to policy kan.liang
2016-09-12 14:55 ` [RFC V3 PATCH 21/26] net/netpolicy: introduce per task net policy kan.liang
2016-09-12 14:55 ` [RFC V3 PATCH 22/26] net/netpolicy: set per task policy by proc kan.liang
2016-09-12 17:01 ` Sergei Shtylyov
2016-09-12 14:55 ` [RFC V3 PATCH 23/26] net/netpolicy: fast path for finding the queues kan.liang
2016-09-12 14:55 ` [RFC V3 PATCH 24/26] net/netpolicy: optimize for queue pair kan.liang
2016-09-12 14:55 ` [RFC V3 PATCH 25/26] net/netpolicy: limit the total record number kan.liang
2016-09-12 14:55 ` [RFC V3 PATCH 26/26] Documentation/networking: Document NET policy kan.liang
2016-09-12 15:38 ` [RFC V3 PATCH 00/26] Kernel " Florian Westphal
2016-09-12 17:21 ` Cong Wang
2016-09-12 15:52 ` Eric Dumazet
2016-09-19 20:39 ` Stephen Hemminger
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