[RFC PATCH 28/30] net/netpolicy: optimize for queue pair

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

Some drivers like i40e driver does not support separate tx and rx queues
as channels. Using rx queue to stand for the channels, if queue_pair is
set by driver.

Signed-off-by: Kan Liang <kan.liang@intel.com>
---
drivers/net/ethernet/intel/i40e/i40e_main.c | 3 +++
include/linux/netpolicy.h | 1 +
net/core/netpolicy.c | 3 +++
3 files changed, 7 insertions(+)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index d3f087d..f03d9f6 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -9009,6 +9009,9 @@ static int i40e_ndo_netpolicy_init(struct net_device *dev,
/* support MIX policy */
info->has_mix_policy = true;

+ /* support queue pair */
+ info->queue_pair = true;
+
return 0;
}

diff --git a/include/linux/netpolicy.h b/include/linux/netpolicy.h
index fa740b5..2de59a6 100644
--- a/include/linux/netpolicy.h
+++ b/include/linux/netpolicy.h
@@ -75,6 +75,7 @@ struct netpolicy_info {
enum netpolicy_name cur_policy;
unsigned long avail_policy[BITS_TO_LONGS(NET_POLICY_MAX)];
bool has_mix_policy;
+ bool queue_pair;
/* cpu and queue mapping information */
struct netpolicy_sys_info sys_info;
/* List of policy objects 0 rx 1 tx */
diff --git a/net/core/netpolicy.c b/net/core/netpolicy.c
index a63ccd4..83242d3 100644
--- a/net/core/netpolicy.c
+++ b/net/core/netpolicy.c
@@ -398,6 +398,9 @@ int netpolicy_pick_queue(struct netpolicy_reg *reg, bool is_rx)
(current->task_netpolicy.policy != reg->policy))
return -EINVAL;

+ if (dev->netpolicy->queue_pair)
+ is_rx = true;
+
/* fast path */
read_lock(&np_sys_map_lock);
if (netpolicy_sys_map_version == reg->sys_map_version) {
--
2.5.5