[libvirt] [PATCH v4 05/14] conf: Introduce new hostdev device type mdev
Erik Skultety
eskultet at redhat.com
Wed Mar 22 15:27:33 UTC 2017
A mediated device will be identified by a UUID (with 'model' now being
a mandatory <hostdev> attribute to represent the mediated device API) of
the user pre-created mediated device. The data necessary to identify a
mediated device can be easily extended in the future, e.g. when
auto-creation of mediated devices should be enabled. We also need to
make sure that if user explicitly provides a guest address
for a mdev device, the address type will be matching the device API
supported on that specific mediated device and error out with an
incorrect XML message.
Signed-off-by: Erik Skultety <eskultet at redhat.com>
---
docs/schemas/domaincommon.rng | 22 +++++++++
src/conf/domain_conf.c | 99 ++++++++++++++++++++++++++++++++++++-
src/conf/domain_conf.h | 9 ++++
src/qemu/qemu_domain.c | 1 +
src/qemu/qemu_hotplug.c | 2 +
src/security/security_apparmor.c | 3 ++
src/security/security_dac.c | 2 +
src/security/security_selinux.c | 2 +
tests/domaincapsschemadata/full.xml | 1 +
9 files changed, 140 insertions(+), 1 deletion(-)
diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index fbedc9b1f9..edc225fe50 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -4034,6 +4034,7 @@
<ref name="hostdevsubsysusb"/>
<ref name="hostdevsubsysscsi"/>
<ref name="hostdevsubsyshost"/>
+ <ref name="hostdevsubsysmdev"/>
</choice>
</define>
@@ -4184,6 +4185,20 @@
</element>
</define>
+ <define name="hostdevsubsysmdev">
+ <attribute name="type">
+ <value>mdev</value>
+ </attribute>
+ <attribute name="model">
+ <choice>
+ <value>vfio-pci</value>
+ </choice>
+ </attribute>
+ <element name="source">
+ <ref name="mdevaddress"/>
+ </element>
+ </define>
+
<define name="hostdevcapsstorage">
<attribute name="type">
<value>storage</value>
@@ -4342,6 +4357,13 @@
</attribute>
</optional>
</define>
+ <define name="mdevaddress">
+ <element name="address">
+ <attribute name="uuid">
+ <ref name="UUID"/>
+ </attribute>
+ </element>
+ </define>
<define name="devices">
<element name="devices">
<interleave>
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index a5ab42297d..63ac65e8ab 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -56,6 +56,7 @@
#include "virstring.h"
#include "virnetdev.h"
#include "virhostdev.h"
+#include "virmdev.h"
#define VIR_FROM_THIS VIR_FROM_DOMAIN
@@ -652,7 +653,8 @@ VIR_ENUM_IMPL(virDomainHostdevSubsys, VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_LAST,
"usb",
"pci",
"scsi",
- "scsi_host")
+ "scsi_host",
+ "mdev")
VIR_ENUM_IMPL(virDomainHostdevSubsysPCIBackend,
VIR_DOMAIN_HOSTDEV_PCI_BACKEND_TYPE_LAST,
@@ -2356,6 +2358,7 @@ void virDomainHostdevDefClear(virDomainHostdevDefPtr def)
break;
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB:
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI:
+ case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_MDEV:
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_LAST:
break;
}
@@ -4251,6 +4254,23 @@ virDomainHostdevDefPostParse(virDomainHostdevDefPtr dev,
}
}
break;
+ case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_MDEV: {
+ int model = dev->source.subsys.u.mdev.model;
+
+ if (dev->info->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE)
+ return 0;
+
+ if (model == VIR_MDEV_MODEL_TYPE_VFIO_PCI &&
+ dev->info->type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI) {
+ virReportError(VIR_ERR_XML_ERROR,
+ _("Unsupported address type '%s' with mediated "
+ "device model '%s'"),
+ virDomainDeviceAddressTypeToString(dev->info->type),
+ virMediatedDeviceModelTypeToString(model));
+ return -1;
+ }
+ }
+
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB:
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI:
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI_HOST:
@@ -6397,6 +6417,41 @@ virDomainHostdevSubsysSCSIVHostDefParseXML(xmlNodePtr sourcenode,
return ret;
}
+static int
+virDomainHostdevSubsysMediatedDevDefParseXML(virDomainHostdevDefPtr def,
+ xmlXPathContextPtr ctxt)
+{
+ int ret = -1;
+ unsigned char uuid[VIR_UUID_BUFLEN] = {0};
+ char *uuidxml = NULL;
+ xmlNodePtr node = NULL;
+ virDomainHostdevSubsysMediatedDevPtr mdevsrc = &def->source.subsys.u.mdev;
+
+ if (!(node = virXPathNode("./source/address", ctxt))) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+ _("Missing <address> element"));
+ goto cleanup;
+ }
+
+ if (!(uuidxml = virXMLPropString(node, "uuid"))) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+ _("Missing 'uuid' attribute for element <address>"));
+ goto cleanup;
+ }
+
+ if (virUUIDParse(uuidxml, uuid) < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ "%s",
+ _("Cannot parse uuid attribute of element <address>"));
+ goto cleanup;
+ }
+
+ virUUIDFormat(uuid, mdevsrc->uuidstr);
+ ret = 0;
+ cleanup:
+ VIR_FREE(uuidxml);
+ return ret;
+}
static int
virDomainHostdevDefParseXMLSubsys(xmlNodePtr node,
@@ -6410,10 +6465,12 @@ virDomainHostdevDefParseXMLSubsys(xmlNodePtr node,
char *sgio = NULL;
char *rawio = NULL;
char *backendStr = NULL;
+ char *model = NULL;
int backend;
int ret = -1;
virDomainHostdevSubsysPCIPtr pcisrc = &def->source.subsys.u.pci;
virDomainHostdevSubsysSCSIPtr scsisrc = &def->source.subsys.u.scsi;
+ virDomainHostdevSubsysMediatedDevPtr mdevsrc = &def->source.subsys.u.mdev;
/* @managed can be read from the xml document - it is always an
* attribute of the toplevel element, no matter what type of
@@ -6427,6 +6484,7 @@ virDomainHostdevDefParseXMLSubsys(xmlNodePtr node,
sgio = virXMLPropString(node, "sgio");
rawio = virXMLPropString(node, "rawio");
+ model = virXMLPropString(node, "model");
/* @type is passed in from the caller rather than read from the
* xml document, because it is specified in different places for
@@ -6493,6 +6551,28 @@ virDomainHostdevDefParseXMLSubsys(xmlNodePtr node,
}
}
+ if (def->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_MDEV) {
+ if (model) {
+ virReportError(VIR_ERR_XML_ERROR, "%s",
+ _("model is only supported with mediated devices"));
+ goto error;
+ }
+ } else {
+ if (!model) {
+ virReportError(VIR_ERR_XML_ERROR, "%s",
+ _("Missing 'model' attribute in mediated device's "
+ "<hostdev> element"));
+ goto error;
+ }
+
+ if ((mdevsrc->model = virMediatedDeviceModelTypeFromString(model)) < 0) {
+ virReportError(VIR_ERR_XML_ERROR,
+ _("unknown hostdev model '%s'"),
+ model);
+ goto error;
+ }
+ }
+
switch (def->source.subsys.type) {
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI:
if (virDomainHostdevSubsysPCIDefParseXML(sourcenode, def, flags) < 0)
@@ -6525,6 +6605,10 @@ virDomainHostdevDefParseXMLSubsys(xmlNodePtr node,
if (virDomainHostdevSubsysSCSIVHostDefParseXML(sourcenode, def) < 0)
goto error;
break;
+ case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_MDEV:
+ if (virDomainHostdevSubsysMediatedDevDefParseXML(def, ctxt) < 0)
+ goto error;
+ break;
default:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
@@ -6539,6 +6623,7 @@ virDomainHostdevDefParseXMLSubsys(xmlNodePtr node,
VIR_FREE(sgio);
VIR_FREE(rawio);
VIR_FREE(backendStr);
+ VIR_FREE(model);
return ret;
}
@@ -13384,6 +13469,7 @@ virDomainHostdevDefParseXML(virDomainXMLOptionPtr xmlopt,
}
break;
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB:
+ case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_MDEV:
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_LAST:
break;
}
@@ -14318,6 +14404,7 @@ virDomainHostdevMatchSubsys(virDomainHostdevDefPtr a,
return 1;
else
return 0;
+ case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_MDEV:
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_LAST:
return 0;
}
@@ -21319,6 +21406,7 @@ virDomainHostdevDefFormatSubsys(virBufferPtr buf,
virDomainHostdevSubsysPCIPtr pcisrc = &def->source.subsys.u.pci;
virDomainHostdevSubsysSCSIPtr scsisrc = &def->source.subsys.u.scsi;
virDomainHostdevSubsysSCSIVHostPtr hostsrc = &def->source.subsys.u.scsi_host;
+ virDomainHostdevSubsysMediatedDevPtr mdevsrc = &def->source.subsys.u.mdev;
virDomainHostdevSubsysSCSIHostPtr scsihostsrc = &scsisrc->u.host;
virDomainHostdevSubsysSCSIiSCSIPtr iscsisrc = &scsisrc->u.iscsi;
@@ -21423,6 +21511,10 @@ virDomainHostdevDefFormatSubsys(virBufferPtr buf,
break;
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI_HOST:
break;
+ case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_MDEV:
+ virBufferAsprintf(buf, "<address uuid='%s'/>\n",
+ mdevsrc->uuidstr);
+ break;
default:
virReportError(VIR_ERR_INTERNAL_ERROR,
_("unexpected hostdev type %d"),
@@ -23318,6 +23410,7 @@ virDomainHostdevDefFormat(virBufferPtr buf,
{
const char *mode = virDomainHostdevModeTypeToString(def->mode);
virDomainHostdevSubsysSCSIPtr scsisrc = &def->source.subsys.u.scsi;
+ virDomainHostdevSubsysMediatedDevPtr mdevsrc = &def->source.subsys.u.mdev;
const char *type;
if (!mode) {
@@ -23367,6 +23460,10 @@ virDomainHostdevDefFormat(virBufferPtr buf,
virBufferAsprintf(buf, " rawio='%s'",
virTristateBoolTypeToString(scsisrc->rawio));
}
+
+ if (def->source.subsys.type == VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_MDEV)
+ virBufferAsprintf(buf, " model='%s'",
+ virMediatedDeviceModelTypeToString(mdevsrc->model));
}
virBufferAddLit(buf, ">\n");
virBufferAdjustIndent(buf, 2);
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 8e6d874178..47eaacef3d 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -295,6 +295,7 @@ typedef enum {
VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI,
VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI,
VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI_HOST,
+ VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_MDEV,
VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_LAST
} virDomainHostdevSubsysType;
@@ -369,6 +370,13 @@ struct _virDomainHostdevSubsysSCSI {
} u;
};
+typedef struct _virDomainHostdevSubsysMediatedDev virDomainHostdevSubsysMediatedDev;
+typedef virDomainHostdevSubsysMediatedDev *virDomainHostdevSubsysMediatedDevPtr;
+struct _virDomainHostdevSubsysMediatedDev {
+ int model; /* enum virMediatedDeviceModelType */
+ char uuidstr[VIR_UUID_STRING_BUFLEN]; /* mediated device's uuid string */
+};
+
typedef enum {
VIR_DOMAIN_HOSTDEV_SUBSYS_SCSI_HOST_PROTOCOL_TYPE_NONE,
VIR_DOMAIN_HOSTDEV_SUBSYS_SCSI_HOST_PROTOCOL_TYPE_VHOST,
@@ -394,6 +402,7 @@ struct _virDomainHostdevSubsys {
virDomainHostdevSubsysPCI pci;
virDomainHostdevSubsysSCSI scsi;
virDomainHostdevSubsysSCSIVHost scsi_host;
+ virDomainHostdevSubsysMediatedDev mdev;
} u;
};
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index c239a06767..c0f060b0a3 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -7102,6 +7102,7 @@ qemuDomainGetHostdevPath(virDomainDefPtr def,
break;
}
+ case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_MDEV:
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_LAST:
break;
}
diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index ddcbc5e259..66c469e55e 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -3907,6 +3907,8 @@ qemuDomainRemoveHostDevice(virQEMUDriverPtr driver,
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI_HOST:
qemuDomainRemoveSCSIVHostDevice(driver, vm, hostdev);
break;
+ case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_MDEV:
+ break;
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_LAST:
break;
}
diff --git a/src/security/security_apparmor.c b/src/security/security_apparmor.c
index 0d3e891a71..f5b72e1c2d 100644
--- a/src/security/security_apparmor.c
+++ b/src/security/security_apparmor.c
@@ -901,6 +901,9 @@ AppArmorSetSecurityHostdevLabel(virSecurityManagerPtr mgr,
break;
}
+ case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_MDEV:
+ break;
+
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_LAST:
ret = 0;
break;
diff --git a/src/security/security_dac.c b/src/security/security_dac.c
index d6a2daf747..4e968f29c0 100644
--- a/src/security/security_dac.c
+++ b/src/security/security_dac.c
@@ -964,6 +964,7 @@ virSecurityDACSetHostdevLabel(virSecurityManagerPtr mgr,
break;
}
+ case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_MDEV:
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_LAST:
ret = 0;
break;
@@ -1119,6 +1120,7 @@ virSecurityDACRestoreHostdevLabel(virSecurityManagerPtr mgr,
break;
}
+ case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_MDEV:
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_LAST:
ret = 0;
break;
diff --git a/src/security/security_selinux.c b/src/security/security_selinux.c
index a6bcf9e01f..7b3276dc34 100644
--- a/src/security/security_selinux.c
+++ b/src/security/security_selinux.c
@@ -1838,6 +1838,7 @@ virSecuritySELinuxSetHostdevSubsysLabel(virSecurityManagerPtr mgr,
break;
}
+ case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_MDEV:
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_LAST:
ret = 0;
break;
@@ -2065,6 +2066,7 @@ virSecuritySELinuxRestoreHostdevSubsysLabel(virSecurityManagerPtr mgr,
break;
}
+ case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_MDEV:
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_LAST:
ret = 0;
break;
diff --git a/tests/domaincapsschemadata/full.xml b/tests/domaincapsschemadata/full.xml
index 6a676253c3..82a92322e5 100644
--- a/tests/domaincapsschemadata/full.xml
+++ b/tests/domaincapsschemadata/full.xml
@@ -89,6 +89,7 @@
<value>pci</value>
<value>scsi</value>
<value>scsi_host</value>
+ <value>mdev</value>
</enum>
<enum name='capsType'>
<value>storage</value>
--
2.12.1
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