Commit f0fa2974 authored by Stephen Hemminger's avatar Stephen Hemminger Committed by Greg Kroah-Hartman
Browse files

vmbus: add monitor_id and subchannel_id to sysfs per channel 



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

Signed-off-by: default avatarStephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent b4ea81ee

Documentation/ABI/stable/sysfs-bus-vmbus

+14 −0
Original line number Diff line number Diff line
@@ -118,3 +118,17 @@ KernelVersion: 4.14 
Contact:	Stephen Hemminger <sthemmin@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@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@microsoft.com>

Description:	Monitor bit associated with channel

Users:		Debugging tools and userspace drivers

drivers/hv/vmbus_drv.c

+17 −0
Original line number Diff line number Diff line
@@ -1254,6 +1254,21 @@ 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,
@@ -1264,6 +1279,8 @@ 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

};