[RFC V3 PATCH 07/26] net/netpolicy: enable and disable NET policy
From: <hidden>
Date: 2016-09-12 14:56:45
Also in:
lkml
Subsystem:
networking [general], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Kan Liang <redacted> This patch introduces functions to enable and disable NET policy. For enabling, it collects device and CPU information and setup CPU/queue mapping. Also, for some drivers like i40e driver, it will get better performance if setting IRQ affinity. This patch provides an option irq_affinity for driver to set IRQ affinity in NET policy enabling. For disabling, it removes the IRQ affinity (if set) and mapping information. np_lock should protect the enable and disable state. It will be done later in this series. Signed-off-by: Kan Liang <redacted> --- include/linux/netpolicy.h | 1 + net/core/netpolicy.c | 41 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 42 insertions(+)
diff --git a/include/linux/netpolicy.h b/include/linux/netpolicy.h
index a946b75c..bfab7b8 100644
--- a/include/linux/netpolicy.h
+++ b/include/linux/netpolicy.h@@ -49,6 +49,7 @@ struct netpolicy_sys_info { struct netpolicy_info { enum netpolicy_name cur_policy; unsigned long avail_policy[BITS_TO_LONGS(NET_POLICY_MAX)]; + bool irq_affinity; /* cpu and queue mapping information */ struct netpolicy_sys_info sys_info; };
diff --git a/net/core/netpolicy.c b/net/core/netpolicy.c
index adcb5e3..a6e240f 100644
--- a/net/core/netpolicy.c
+++ b/net/core/netpolicy.c@@ -162,6 +162,47 @@ static void netpolicy_set_affinity(struct net_device *dev) } } +static int netpolicy_disable(struct net_device *dev) +{ + if (dev->netpolicy->irq_affinity) + netpolicy_clear_affinity(dev); + netpolicy_free_sys_map(dev); + + return 0; +} + +static int netpolicy_enable(struct net_device *dev) +{ + int ret; + struct netpolicy_dev_info d_info; + u32 cpu; + + if (WARN_ON(!dev->netpolicy)) + return -EINVAL; + + /* get driver information */ + ret = netpolicy_get_dev_info(dev, &d_info); + if (ret) + return ret; + + /* get cpu information */ + cpu = netpolicy_get_cpu_information(); + + /* create sys map */ + ret = netpolicy_update_sys_map(dev, &d_info, cpu); + if (ret) { + netpolicy_free_dev_info(&d_info); + return ret; + } + + /* set irq affinity */ + if (dev->netpolicy->irq_affinity) + netpolicy_set_affinity(dev); + + netpolicy_free_dev_info(&d_info); + return 0; +} + const char *policy_name[NET_POLICY_MAX] = { "NONE" };
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2.5.5