[PATCH v2 03/11] vmbus: add monitor_id and subchannel_id to sysfs per channel

[Stephen Hemminger]

Useful to identify which network queue is associated with
which vmbus channel.

Signed-off-by: Stephen Hemminger <sthemmin at microsoft.com>
---
 Documentation/ABI/stable/sysfs-bus-vmbus | 14 ++++++++++++++
 drivers/hv/vmbus_drv.c                   | 17 +++++++++++++++++
 2 files changed, 31 insertions(+)

diff --git a/Documentation/ABI/stable/sysfs-bus-vmbus b/Documentation/ABI/stable/sysfs-bus-vmbus
index b7174a5616d6..e46be65d0e1d 100644
--- a/Documentation/ABI/stable/sysfs-bus-vmbus
+++ b/Documentation/ABI/stable/sysfs-bus-vmbus
@@ -118,3 +118,17 @@ KernelVersion:	4.14
 Contact:	Stephen Hemminger <sthemmin at microsoft.com>
 Description:	Number of times we have taken an interrupt (incoming)
 Users:		Debugging tools
+
+What:		/sys/bus/vmbus/devices/vmbus_*/channels/NN/subchannel_id
+Date:		January. 2018
+KernelVersion:	4.16
+Contact:	Stephen Hemminger <sthemmin at microsoft.com>
+Description:	Subchannel ID associated with VMBUS channel
+Users:		Debugging tools and userspace drivers
+
+What:		/sys/bus/vmbus/devices/vmbus_*/channels/NN/monitor_id
+Date:		January. 2018
+KernelVersion:	4.16
+Contact:	Stephen Hemminger <sthemmin at microsoft.com>
+Description:	Monitor bit associated with channel
+Users:		Debugging tools and userspace drivers
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index 74e256db7d57..91cba71c0113 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -1255,6 +1255,21 @@ static ssize_t channel_events_show(const struct vmbus_channel *channel, char *bu
 }
 static VMBUS_CHAN_ATTR(events, S_IRUGO, channel_events_show, NULL);
 
+static ssize_t subchannel_monitor_id_show(const struct vmbus_channel *channel,
+					  char *buf)
+{
+	return sprintf(buf, "%u\n", channel->offermsg.monitorid);
+}
+static VMBUS_CHAN_ATTR(monitor_id, S_IRUGO, subchannel_monitor_id_show, NULL);
+
+static ssize_t subchannel_id_show(const struct vmbus_channel *channel,
+				  char *buf)
+{
+	return sprintf(buf, "%u\n",
+		       channel->offermsg.offer.sub_channel_index);
+}
+static VMBUS_CHAN_ATTR_RO(subchannel_id);
+
 static struct attribute *vmbus_chan_attrs[] = {
 	&chan_attr_out_mask.attr,
 	&chan_attr_in_mask.attr,
@@ -1265,6 +1280,8 @@ static struct attribute *vmbus_chan_attrs[] = {
 	&chan_attr_latency.attr,
 	&chan_attr_interrupts.attr,
 	&chan_attr_events.attr,
+	&chan_attr_monitor_id.attr,
+	&chan_attr_subchannel_id.attr,
 	NULL
 };
 
-- 
2.15.1