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    Subject[RFC PATCH 18/30] net/netpolicy: handle channel changes
    Date
    From: Kan Liang <kan.liang@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.liang@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
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