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

kan.liang
2016-07-18T14:23:24Z

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@intel.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