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vmbus: add monitor_id and subchannel_id to sysfs per channel

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

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Stephen Hemminger 2018-01-09 10:29:06 -08:00 committed by Greg Kroah-Hartman
parent b4ea81ee4a
commit f0fa297404
2 changed files with 31 additions and 0 deletions
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14
Documentation/ABI/stable/sysfs-bus-vmbus
View file

@ -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

17
drivers/hv/vmbus_drv.c
View file

@ -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
};