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conf: Check for hostdev conflicts when assign default disk address

Browse Source 
https://bugzilla.redhat.com/show_bug.cgi?id=1210587  (completed)

When generating the default drive address for a SCSI <disk> device,
check the generated address to ensure it doesn't conflict with a SCSI
<hostdev> address. The <disk> address generation algorithm uses the
<target> "dev" name in order to determine which controller and unit
in order to place the device. Since a SCSI <hostdev> device doesn't
require a target device name, its placement on the guest SCSI address
"could" conflict.  For instance, if a SCSI <hostdev> exists at
controller=0 unit=0 and an attempt to hotplug 'sda' into the guest
made, there would be a conflict if the <hostdev> is already using
/dev/sda.
This commit is contained in:
John Ferlan 2015-06-22 15:13:39 -04:00
parent d6ea4adbfc
commit 1b08cc170a
5 changed files with 32 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
src/conf/domain_conf.c
View File

@ -4127,7 +4127,7 @@ virDomainDeviceDefPostParseInternal(virDomainDeviceDefPtr dev,
}
if (disk->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE &&
virDomainDiskDefAssignAddress(xmlopt, disk) < 0)
virDomainDiskDefAssignAddress(xmlopt, disk, def) < 0)
return -1;
}
@ -5929,7 +5929,8 @@ virDomainDiskDiffersSourceOnly(virDomainDiskDefPtr disk,
int
virDomainDiskDefAssignAddress(virDomainXMLOptionPtr xmlopt,
virDomainDiskDefPtr def)
virDomainDiskDefPtr def,
const virDomainDef *vmdef)
{
int idx = virDiskNameToIndex(def->dst);
if (idx < 0) {
@ -5965,6 +5966,17 @@ virDomainDiskDefAssignAddress(virDomainXMLOptionPtr xmlopt,
unit = idx % 7;
}
if (virDomainDriveAddressIsUsedByHostdev(vmdef,
VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI,
controller, 0, 0, unit)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("using disk target name '%s' conflicts with "
"SCSI host device address controller='%u' "
"bus='%u' target='%u' unit='%u"),
def->dst, controller, 0, 0, unit);
return -1;
}
def->info.addr.drive.controller = controller;
def->info.addr.drive.bus = 0;
def->info.addr.drive.target = 0;

3
src/conf/domain_conf.h
View File

@ -2755,7 +2755,8 @@ int virDomainDiskInsert(virDomainDefPtr def,
void virDomainDiskInsertPreAlloced(virDomainDefPtr def,
virDomainDiskDefPtr disk);
int virDomainDiskDefAssignAddress(virDomainXMLOptionPtr xmlopt,
virDomainDiskDefPtr def);
virDomainDiskDefPtr def,
const virDomainDef *vmdef);
virDomainDiskDefPtr
virDomainDiskRemove(virDomainDefPtr def, size_t i);

4
src/qemu/qemu_command.c
View File

@ -12105,7 +12105,7 @@ qemuParseCommandLineDisk(virDomainXMLOptionPtr xmlopt,
else
def->dst[2] = 'a' + idx;
if (virDomainDiskDefAssignAddress(xmlopt, def) < 0) {
if (virDomainDiskDefAssignAddress(xmlopt, def, dom) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("invalid device name '%s'"), def->dst);
virDomainDiskDefFree(def);
@ -13248,7 +13248,7 @@ qemuParseCommandLine(virCapsPtr qemuCaps,
}
}
if (virDomainDiskDefAssignAddress(xmlopt, disk) < 0) {
if (virDomainDiskDefAssignAddress(xmlopt, disk, def) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Cannot assign address for device name '%s'"),
disk->dst);

22
src/vmx/vmx.c
View File

@ -960,7 +960,9 @@ virVMXFloppyDiskNameToUnit(const char *name, int *unit)
static int
virVMXVerifyDiskAddress(virDomainXMLOptionPtr xmlopt, virDomainDiskDefPtr disk)
virVMXVerifyDiskAddress(virDomainXMLOptionPtr xmlopt,
virDomainDiskDefPtr disk,
virDomainDefPtr vmdef)
{
virDomainDiskDef def;
virDomainDeviceDriveAddressPtr drive;
@ -979,7 +981,7 @@ virVMXVerifyDiskAddress(virDomainXMLOptionPtr xmlopt, virDomainDiskDefPtr disk)
def.dst = disk->dst;
def.bus = disk->bus;
if (virDomainDiskDefAssignAddress(xmlopt, &def) < 0) {
if (virDomainDiskDefAssignAddress(xmlopt, &def, vmdef) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Could not verify disk address"));
return -1;
@ -1588,7 +1590,7 @@ virVMXParseConfig(virVMXContext *ctx,
if (virVMXParseDisk(ctx, xmlopt, conf, VIR_DOMAIN_DISK_DEVICE_DISK,
VIR_DOMAIN_DISK_BUS_SCSI, controller, unit,
&def->disks[def->ndisks]) < 0) {
&def->disks[def->ndisks], def) < 0) {
goto cleanup;
}
@ -1599,7 +1601,7 @@ virVMXParseConfig(virVMXContext *ctx,
if (virVMXParseDisk(ctx, xmlopt, conf, VIR_DOMAIN_DISK_DEVICE_CDROM,
VIR_DOMAIN_DISK_BUS_SCSI, controller, unit,
&def->disks[def->ndisks]) < 0) {
&def->disks[def->ndisks], def) < 0) {
goto cleanup;
}
@ -1613,7 +1615,7 @@ virVMXParseConfig(virVMXContext *ctx,
for (unit = 0; unit < 2; ++unit) {
if (virVMXParseDisk(ctx, xmlopt, conf, VIR_DOMAIN_DISK_DEVICE_DISK,
VIR_DOMAIN_DISK_BUS_IDE, bus, unit,
&def->disks[def->ndisks]) < 0) {
&def->disks[def->ndisks], def) < 0) {
goto cleanup;
}
@ -1624,7 +1626,7 @@ virVMXParseConfig(virVMXContext *ctx,
if (virVMXParseDisk(ctx, xmlopt, conf, VIR_DOMAIN_DISK_DEVICE_CDROM,
VIR_DOMAIN_DISK_BUS_IDE, bus, unit,
&def->disks[def->ndisks]) < 0) {
&def->disks[def->ndisks], def) < 0) {
goto cleanup;
}
@ -1637,7 +1639,7 @@ virVMXParseConfig(virVMXContext *ctx,
for (unit = 0; unit < 2; ++unit) {
if (virVMXParseDisk(ctx, xmlopt, conf, VIR_DOMAIN_DISK_DEVICE_FLOPPY,
VIR_DOMAIN_DISK_BUS_FDC, 0, unit,
&def->disks[def->ndisks]) < 0) {
&def->disks[def->ndisks], def) < 0) {
goto cleanup;
}
@ -1925,7 +1927,7 @@ virVMXParseSCSIController(virConfPtr conf, int controller, bool *present,
int
virVMXParseDisk(virVMXContext *ctx, virDomainXMLOptionPtr xmlopt, virConfPtr conf,
int device, int busType, int controllerOrBus, int unit,
virDomainDiskDefPtr *def)
virDomainDiskDefPtr *def, virDomainDefPtr vmdef)
{
/*
* device = {VIR_DOMAIN_DISK_DEVICE_DISK,
@ -2280,7 +2282,7 @@ virVMXParseDisk(virVMXContext *ctx, virDomainXMLOptionPtr xmlopt, virConfPtr con
goto cleanup;
}
if (virDomainDiskDefAssignAddress(xmlopt, *def) < 0) {
if (virDomainDiskDefAssignAddress(xmlopt, *def, vmdef) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Could not assign address to disk '%s'"),
virDomainDiskGetSource(*def));
@ -3189,7 +3191,7 @@ virVMXFormatConfig(virVMXContext *ctx, virDomainXMLOptionPtr xmlopt, virDomainDe
/* def:disks */
for (i = 0; i < def->ndisks; ++i) {
if (virVMXVerifyDiskAddress(xmlopt, def->disks[i]) < 0 ||
if (virVMXVerifyDiskAddress(xmlopt, def->disks[i], def) < 0 ||
virVMXHandleLegacySCSIDiskDriverName(def, def->disks[i]) < 0) {
goto cleanup;
}

3
src/vmx/vmx.h
View File

@ -89,7 +89,8 @@ int virVMXParseSCSIController(virConfPtr conf, int controller, bool *present,
int virVMXParseDisk(virVMXContext *ctx, virDomainXMLOptionPtr xmlopt,
virConfPtr conf, int device, int busType,
int controllerOrBus, int unit, virDomainDiskDefPtr *def);
int controllerOrBus, int unit, virDomainDiskDefPtr *def,
virDomainDefPtr vmdef);
int virVMXParseFileSystem(virConfPtr conf, int number, virDomainFSDefPtr *def);