[RFC PATCH 18/30] net/netpolicy: handle channel changes

[kan . liang]

From: Kan Liang <kan.li...@intel.com>

User can uses ethtool to set the channel number. This patch handles the
channel changes by rebuilding the object list.

Signed-off-by: Kan Liang <kan.li...@intel.com>
---
 include/linux/netpolicy.h | 8 ++++++++
 net/core/ethtool.c        | 8 +++++++-
 net/core/netpolicy.c      | 1 +
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/include/linux/netpolicy.h b/include/linux/netpolicy.h
index 579ff98..cc75e3c 100644
--- a/include/linux/netpolicy.h
+++ b/include/linux/netpolicy.h
@@ -79,4 +79,12 @@ struct netpolicy_info {
        struct list_head                
obj_list[NETPOLICY_RXTX][NET_POLICY_MAX];
 };
 
+#ifdef CONFIG_NETPOLICY
+extern void update_netpolicy_sys_map(void);
+#else
+static inline void update_netpolicy_sys_map(void)
+{
+}
+#endif
+
 #endif /*__LINUX_NETPOLICY_H*/
diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index 9774898..e1f8bd0 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -1703,6 +1703,7 @@ static noinline_for_stack int ethtool_set_channels(struct 
net_device *dev,
 {
        struct ethtool_channels channels, max;
        u32 max_rx_in_use = 0;
+       int ret;
 
        if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
                return -EOPNOTSUPP;
@@ -1726,7 +1727,12 @@ static noinline_for_stack int 
ethtool_set_channels(struct net_device *dev,
            (channels.combined_count + channels.rx_count) <= max_rx_in_use)
            return -EINVAL;
 
-       return dev->ethtool_ops->set_channels(dev, &channels);
+       ret = dev->ethtool_ops->set_channels(dev, &channels);
+#ifdef CONFIG_NETPOLICY
+       if (!ret)
+               update_netpolicy_sys_map();
+#endif
+       return ret;
 }
 
 static int ethtool_get_pauseparam(struct net_device *dev, void __user 
*useraddr)
diff --git a/net/core/netpolicy.c b/net/core/netpolicy.c
index 46af407..da7d9f1 100644
--- a/net/core/netpolicy.c
+++ b/net/core/netpolicy.c
@@ -887,6 +887,7 @@ unlock:
                }
        }
 }
+EXPORT_SYMBOL(update_netpolicy_sys_map);
 
 static int netpolicy_cpu_callback(struct notifier_block *nfb,
                                  unsigned long action, void *hcpu)
-- 
2.5.5