libvirt/SOURCES/libvirt-nodedev-add-optional-device-address-of-channel-device-to-css-device.patch

152 lines
5.4 KiB
Diff
Raw Normal View History

From 5921eeddf0a284ccbec04896901c9bd4177de6dd Mon Sep 17 00:00:00 2001
Message-Id: <5921eeddf0a284ccbec04896901c9bd4177de6dd@dist-git>
From: Boris Fiuczynski <fiuczy@linux.ibm.com>
Date: Fri, 13 May 2022 12:31:15 +0200
Subject: [PATCH] nodedev: add optional device address of channel device to css
device
Add the new introduced sysfs attribute dev_busid which provides the address
of the device in the subchannel independent from the bound device driver.
It is added if available in the sysfs as optional channel_dev_addr element into
the css device capabilty providing the ccw deivce address attributes cssid,
ssid and devno.
Signed-off-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
(cherry picked from commit 122b975e4004c83b6fc442ec6cdfd71eb5b55cc4)
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2165011
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
docs/schemas/nodedev.rng | 5 +++++
src/conf/node_device_conf.c | 28 ++++++++++++++++++++++++++++
src/conf/node_device_conf.h | 2 ++
src/node_device/node_device_udev.c | 8 ++++++++
4 files changed, 43 insertions(+)
diff --git a/docs/schemas/nodedev.rng b/docs/schemas/nodedev.rng
index 29515d2d7e..43f1abc247 100644
--- a/docs/schemas/nodedev.rng
+++ b/docs/schemas/nodedev.rng
@@ -677,6 +677,11 @@
<value>css</value>
</attribute>
<ref name="capccwaddress"/>
+ <optional>
+ <element name="channel_dev_addr">
+ <ref name="capccwaddress"/>
+ </element>
+ </optional>
<optional>
<ref name="mdev_types"/>
</optional>
diff --git a/src/conf/node_device_conf.c b/src/conf/node_device_conf.c
index fcb5be24e1..16b9497faf 100644
--- a/src/conf/node_device_conf.c
+++ b/src/conf/node_device_conf.c
@@ -643,6 +643,17 @@ virNodeDeviceCapCSSDefFormat(virBuffer *buf,
virNodeDeviceCapCCWDefFormat(buf, data);
+ if (ccw_dev.channel_dev_addr) {
+ virCCWDeviceAddress *ccw = ccw_dev.channel_dev_addr;
+ virBufferAddLit(buf, "<channel_dev_addr>\n");
+ virBufferAdjustIndent(buf, 2);
+ virBufferAsprintf(buf, "<cssid>0x%x</cssid>\n", ccw->cssid);
+ virBufferAsprintf(buf, "<ssid>0x%x</ssid>\n", ccw->ssid);
+ virBufferAsprintf(buf, "<devno>0x%04x</devno>\n", ccw->devno);
+ virBufferAdjustIndent(buf, -2);
+ virBufferAddLit(buf, "</channel_dev_addr>\n");
+ }
+
if (ccw_dev.flags & VIR_NODE_DEV_CAP_FLAG_CSS_MDEV)
virNodeDeviceCapMdevTypesFormat(buf,
ccw_dev.mdev_types,
@@ -1255,6 +1266,7 @@ virNodeDevCapCSSParseXML(xmlXPathContextPtr ctxt,
g_autofree xmlNodePtr *nodes = NULL;
int n = 0;
size_t i = 0;
+ xmlNodePtr channel_ddno = NULL;
ctxt->node = node;
@@ -1269,6 +1281,21 @@ virNodeDevCapCSSParseXML(xmlXPathContextPtr ctxt,
return -1;
}
+ /* channel_dev_addr is optional */
+ if ((channel_ddno = virXPathNode("./channel_dev_addr[1]", ctxt))) {
+ g_autofree virCCWDeviceAddress *channel_dev = NULL;
+
+ channel_dev = g_new0(virCCWDeviceAddress, 1);
+
+ if (virNodeDevCCWDeviceAddressParseXML(ctxt,
+ channel_ddno,
+ def->name,
+ channel_dev) < 0)
+ return -1;
+
+ ccw_dev->channel_dev_addr = g_steal_pointer(&channel_dev);
+ }
+
return 0;
}
@@ -2637,6 +2664,7 @@ virNodeDevCapsDefFree(virNodeDevCapsDef *caps)
for (i = 0; i < data->ccw_dev.nmdev_types; i++)
virMediatedDeviceTypeFree(data->ccw_dev.mdev_types[i]);
g_free(data->ccw_dev.mdev_types);
+ g_free(data->ccw_dev.channel_dev_addr);
break;
case VIR_NODE_DEV_CAP_AP_MATRIX:
g_free(data->ap_matrix.addr);
diff --git a/src/conf/node_device_conf.h b/src/conf/node_device_conf.h
index e4d1f67d53..d1751ed874 100644
--- a/src/conf/node_device_conf.h
+++ b/src/conf/node_device_conf.h
@@ -24,6 +24,7 @@
#include "internal.h"
#include "virbitmap.h"
+#include "virccw.h"
#include "virpcivpd.h"
#include "virscsihost.h"
#include "virpci.h"
@@ -279,6 +280,7 @@ struct _virNodeDevCapCCW {
unsigned int flags; /* enum virNodeDevCCWCapFlags */
virMediatedDeviceType **mdev_types;
size_t nmdev_types;
+ virCCWDeviceAddress *channel_dev_addr;
};
typedef struct _virNodeDevCapVDPA virNodeDevCapVDPA;
diff --git a/src/node_device/node_device_udev.c b/src/node_device/node_device_udev.c
index ffcb3e8640..611a2592ca 100644
--- a/src/node_device/node_device_udev.c
+++ b/src/node_device/node_device_udev.c
@@ -1128,6 +1128,8 @@ static int
udevProcessCSS(struct udev_device *device,
virNodeDeviceDef *def)
{
+ g_autofree char *dev_busid = NULL;
+
/* only process IO subchannel and vfio-ccw devices to keep the list sane */
if (!def->driver ||
(STRNEQ(def->driver, "io_subchannel") &&
@@ -1139,6 +1141,12 @@ udevProcessCSS(struct udev_device *device,
udevGenerateDeviceName(device, def, NULL);
+ /* process optional channel devices information */
+ udevGetStringSysfsAttr(device, "dev_busid", &dev_busid);
+
+ if (dev_busid != NULL)
+ def->caps->data.ccw_dev.channel_dev_addr = virCCWDeviceAddressFromString(dev_busid);
+
if (virNodeDeviceGetCSSDynamicCaps(def->sysfs_path, &def->caps->data.ccw_dev) < 0)
return -1;
--
2.39.1