linux-kernel - [RFC PATCH 04/30] net/netpolicy: get driver information

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Date:	Sun, 17 Jul 2016 23:55:58 -0700
From:	kan.liang@...el.com
To:	davem@...emloft.net, linux-kernel@...r.kernel.org,
	intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org
Cc:	jeffrey.t.kirsher@...el.com, mingo@...hat.com,
	peterz@...radead.org, kuznet@....inr.ac.ru, jmorris@...ei.org,
	yoshfuji@...ux-ipv6.org, kaber@...sh.net,
	akpm@...ux-foundation.org, keescook@...omium.org,
	viro@...iv.linux.org.uk, gorcunov@...nvz.org,
	john.stultz@...aro.org, aduyck@...antis.com, ben@...adent.org.uk,
	decot@...glers.com, jesse.brandeburg@...el.com,
	andi@...stfloor.org, Kan Liang <kan.liang@...el.com>
Subject: [RFC PATCH 04/30] net/netpolicy: get driver information

From: Kan Liang <kan.liang@...el.com>

Net policy needs to know device information. Currently, it's enough to
only get irq information of rx and tx queues. This patch
introduces ndo_get_irq_info to do so.

Signed-off-by: Kan Liang <kan.liang@...el.com>
---
 include/linux/netdevice.h |  5 +++++
 include/linux/netpolicy.h |  7 +++++++
 net/core/netpolicy.c      | 14 ++++++++++++++
 3 files changed, 26 insertions(+)

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index ef45dfe..3470943 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1091,6 +1091,9 @@ struct tc_to_netdev {
  * int (*ndo_netpolicy_init)(struct net_device *dev,
  * 			     struct netpolicy_info *info);
  * 	This function is used to init and get supported policy.
+ * int (*ndo_get_irq_info)(struct net_device *dev,
+ * 			   struct netpolicy_dev_info *info);
+ * 	This function is used to get irq information of rx and tx queues
  *
  */
 struct net_device_ops {
@@ -1278,6 +1281,8 @@ struct net_device_ops {
 #ifdef CONFIG_NETPOLICY
 	int			(*ndo_netpolicy_init)(struct net_device *dev,
 						      struct netpolicy_info *info);
+	int			(*ndo_get_irq_info)(struct net_device *dev,
+						    struct netpolicy_dev_info *info);
 #endif /* CONFIG_NETPOLICY */
 };
 
diff --git a/include/linux/netpolicy.h b/include/linux/netpolicy.h
index ca1f131..fc87d9b 100644
--- a/include/linux/netpolicy.h
+++ b/include/linux/netpolicy.h
@@ -23,6 +23,13 @@ enum netpolicy_name {
 
 extern const char *policy_name[];
 
+struct netpolicy_dev_info {
+	u32	rx_num;
+	u32	tx_num;
+	u32	*rx_irq;
+	u32	*tx_irq;
+};
+
 struct netpolicy_info {
 	enum netpolicy_name	cur_policy;
 	unsigned long avail_policy[BITS_TO_LONGS(NET_POLICY_MAX)];
diff --git a/net/core/netpolicy.c b/net/core/netpolicy.c
index 5f304d5..7c34c8a 100644
--- a/net/core/netpolicy.c
+++ b/net/core/netpolicy.c
@@ -35,6 +35,20 @@
 #include <linux/netdevice.h>
 #include <net/net_namespace.h>
 
+static int netpolicy_get_dev_info(struct net_device *dev,
+				  struct netpolicy_dev_info *d_info)
+{
+	if (!dev->netdev_ops->ndo_get_irq_info)
+		return -ENOTSUPP;
+	return dev->netdev_ops->ndo_get_irq_info(dev, d_info);
+}
+
+static void netpolicy_free_dev_info(struct netpolicy_dev_info *d_info)
+{
+	kfree(d_info->rx_irq);
+	kfree(d_info->tx_irq);
+}
+
 const char *policy_name[NET_POLICY_MAX] = {
 	"NONE"
 };
-- 
2.5.5