[libvirt] [PATCH 06/15] conf: Parse and format the new XML tag cdbfilter
Osier Yang
jyang at redhat.com
Wed Dec 5 09:25:07 UTC 2012
Setting "cdbfilter" to "no" to enable the unprivleged SG_IO, I.e.
Disable the kernel CDB filtering. And "yes" to enable it. "yes"
is the kernel default behaviour. Later patch will do the actual
setting.
---
src/conf/domain_conf.c | 58 +++++++++++++++-----
src/conf/domain_conf.h | 10 ++++
...ml2argv-disk-scsi-lun-passthrough-cdbfilter.xml | 32 +++++++++++
tests/qemuxml2xmltest.c | 1 +
4 files changed, 88 insertions(+), 13 deletions(-)
create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-disk-scsi-lun-passthrough-cdbfilter.xml
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 4ffb39d..50d853e 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -242,6 +242,10 @@ VIR_ENUM_IMPL(virDomainDiskIo, VIR_DOMAIN_DISK_IO_LAST,
"default",
"native",
"threads")
+VIR_ENUM_IMPL(virDomainDiskCDBFilter, VIR_DOMAIN_DISK_CDB_FILTER_LAST,
+ "default",
+ "yes",
+ "no")
VIR_ENUM_IMPL(virDomainIoEventFd, VIR_DOMAIN_IO_EVENT_FD_LAST,
"default",
"on",
@@ -3526,6 +3530,7 @@ virDomainDiskDefParseXML(virCapsPtr caps,
char *device = NULL;
char *snapshot = NULL;
char *rawio = NULL;
+ char *cdbfilter = NULL;
char *driverName = NULL;
char *driverType = NULL;
char *source = NULL;
@@ -3588,6 +3593,7 @@ virDomainDiskDefParseXML(virCapsPtr caps,
snapshot = virXMLPropString(node, "snapshot");
rawio = virXMLPropString(node, "rawio");
+ cdbfilter = virXMLPropString(node, "cdbfilter");
cur = node->children;
while (cur != NULL) {
@@ -4008,24 +4014,46 @@ virDomainDiskDefParseXML(virCapsPtr caps,
def->snapshot = VIR_DOMAIN_SNAPSHOT_LOCATION_NONE;
}
+ if (rawio && cdbfilter) {
+ virReportError(VIR_ERR_XML_ERROR, "%s",
+ _("rawio and cdbfilter are exclusive"));
+ goto error;
+ }
+
+ if ((rawio || cdbfilter) &&
+ (def->device != VIR_DOMAIN_DISK_DEVICE_LUN)) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+ _("rawio or cdbfilter can be used only with "
+ "device='lun'"));
+ goto error;
+ }
+
if (rawio) {
def->rawio_specified = true;
- if (def->device == VIR_DOMAIN_DISK_DEVICE_LUN) {
- if (STREQ(rawio, "yes")) {
- def->rawio = 1;
- } else if (STREQ(rawio, "no")) {
- def->rawio = 0;
- } else {
- virReportError(VIR_ERR_XML_ERROR,
- _("unknown disk rawio setting '%s'"),
- rawio);
- goto error;
- }
+ if (STREQ(rawio, "yes")) {
+ def->rawio = 1;
+ } else if (STREQ(rawio, "no")) {
+ def->rawio = 0;
} else {
- virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
- _("rawio can be used only with device='lun'"));
+ virReportError(VIR_ERR_XML_ERROR,
+ _("unknown disk rawio setting '%s'"),
+ rawio);
+ goto error;
+ }
+ }
+
+ if (cdbfilter) {
+ int cdbfilter_val = 0;
+
+ if ((cdbfilter_val =
+ virDomainDiskCDBFilterTypeFromString(cdbfilter)) < 0) {
+ virReportError(VIR_ERR_XML_ERROR,
+ _("unknown disk cdbfilter setting '%s'"),
+ cdbfilter);
goto error;
}
+
+ def->cdbfilter = cdbfilter_val;
}
if (bus) {
@@ -4262,6 +4290,7 @@ cleanup:
VIR_FREE(type);
VIR_FREE(snapshot);
VIR_FREE(rawio);
+ VIR_FREE(cdbfilter);
VIR_FREE(target);
VIR_FREE(source);
VIR_FREE(tray);
@@ -11940,6 +11969,9 @@ virDomainDiskDefFormat(virBufferPtr buf,
virBufferAddLit(buf, " rawio='no'");
}
}
+ if (def->cdbfilter)
+ virBufferAsprintf(buf, " cdbfilter='%s'",
+ virDomainDiskCDBFilterTypeToString(def->cdbfilter));
if (def->snapshot &&
!(def->snapshot == VIR_DOMAIN_SNAPSHOT_LOCATION_NONE && def->readonly))
virBufferAsprintf(buf, " snapshot='%s'",
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 4ab15e9..6e65cfd 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -507,6 +507,14 @@ enum virDomainDiskIo {
VIR_DOMAIN_DISK_IO_LAST
};
+enum virDomainDiskCDBFilter {
+ VIR_DOMAIN_DISK_CDB_FILTER_DEFAULT = 0,
+ VIR_DOMAIN_DISK_CDB_FILTER_YES, /* reflects to 0 of sysfs unpriv_sgio */
+ VIR_DOMAIN_DISK_CDB_FILTER_NO, /* reflects to 1 of sysfs unpriv_sgio */
+
+ VIR_DOMAIN_DISK_CDB_FILTER_LAST
+};
+
enum virDomainIoEventFd {
VIR_DOMAIN_IO_EVENT_FD_DEFAULT = 0,
VIR_DOMAIN_IO_EVENT_FD_ON,
@@ -618,6 +626,7 @@ struct _virDomainDiskDef {
virStorageEncryptionPtr encryption;
bool rawio_specified;
int rawio; /* no = 0, yes = 1 */
+ int cdbfilter;
size_t nseclabels;
virSecurityDeviceLabelDefPtr *seclabels;
@@ -2209,6 +2218,7 @@ VIR_ENUM_DECL(virDomainDiskErrorPolicy)
VIR_ENUM_DECL(virDomainDiskProtocol)
VIR_ENUM_DECL(virDomainDiskProtocolTransport)
VIR_ENUM_DECL(virDomainDiskIo)
+VIR_ENUM_DECL(virDomainDiskCDBFilter)
VIR_ENUM_DECL(virDomainDiskSecretType)
VIR_ENUM_DECL(virDomainDiskTray)
VIR_ENUM_DECL(virDomainIoEventFd)
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-disk-scsi-lun-passthrough-cdbfilter.xml b/tests/qemuxml2argvdata/qemuxml2argv-disk-scsi-lun-passthrough-cdbfilter.xml
new file mode 100644
index 0000000..731c9bd
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-disk-scsi-lun-passthrough-cdbfilter.xml
@@ -0,0 +1,32 @@
+<domain type='qemu'>
+ <name>QEMUGuest1</name>
+ <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+ <memory unit='KiB'>219136</memory>
+ <currentMemory unit='KiB'>219136</currentMemory>
+ <vcpu placement='static'>1</vcpu>
+ <os>
+ <type arch='i686' machine='pc'>hvm</type>
+ <boot dev='hd'/>
+ </os>
+ <clock offset='utc'/>
+ <on_poweroff>destroy</on_poweroff>
+ <on_reboot>restart</on_reboot>
+ <on_crash>destroy</on_crash>
+ <devices>
+ <emulator>/usr/bin/qemu</emulator>
+ <disk type='block' device='lun' cdbfilter='yes'>
+ <source dev='/dev/HostVG/QEMUGuest1'/>
+ <target dev='hda' bus='scsi'/>
+ <address type='drive' controller='0' bus='0' target='0' unit='0'/>
+ </disk>
+ <disk type='block' device='lun' cdbfilter='no'>
+ <source dev='/dev/HostVG/QEMUGuest2'/>
+ <target dev='hda' bus='scsi'/>
+ <address type='drive' controller='0' bus='0' target='1' unit='1'/>
+ </disk>
+ <controller type='scsi' index='0' model='virtio-scsi'/>
+ <controller type='scsi' index='1' model='lsilogic'/>
+ <controller type='usb' index='0'/>
+ <memballoon model='virtio'/>
+ </devices>
+</domain>
diff --git a/tests/qemuxml2xmltest.c b/tests/qemuxml2xmltest.c
index 3d8176c..af97982 100644
--- a/tests/qemuxml2xmltest.c
+++ b/tests/qemuxml2xmltest.c
@@ -238,6 +238,7 @@ mymain(void)
DO_TEST("seclabel-static");
DO_TEST("seclabel-none");
DO_TEST("numad-static-vcpu-no-numatune");
+ DO_TEST("disk-scsi-lun-passthrough-cdbfilter");
/* These tests generate different XML */
DO_TEST_DIFFERENT("balloon-device-auto");
--
1.7.7.6
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