vmbus: add per-channel sysfs info

This extends existing vmbus related sysfs structure to provide per-channel
state information. This is useful when diagnosing issues with multiple
queues in networking and storage.

The existing sysfs only displayed information about the primary
channel. The one place it reported multiple channels was the
channel_vp_mapping file which violated the sysfs convention
of one value per file.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h
index c458d7b7ad19..ef16ee039850 100644
--- a/include/linux/hyperv.h
+++ b/include/linux/hyperv.h
@@ -829,6 +829,11 @@ struct vmbus_channel {
         struct rcu_head rcu;
 
         /*
+         * For sysfs per-channel properties.
+         */
+        struct kobject                  kobj;
+
+        /*
          * For performance critical channels (storage, networking
          * etc,), Hyper-V has a mechanism to enhance the throughput
          * at the expense of latency:
@@ -1089,6 +1094,7 @@ struct hv_device {
         struct device device;
 
         struct vmbus_channel *channel;
+        struct kset          *channels_kset;
 };