[libvirt] [PATCHv7 2/4] libvirt/qemu - support persistent disk modification

From: KAMEZAWA Hiroyuki <kamezawa.hiroyu(a)jp.fujitsu.com&gt; Date: Fri, 25 Mar 2011 17:08:36 +0900 Subject: [PATCHv7 2/4] libvirt/qemu - support persistent disk modification support changes of disks by VIR_DOMAIN_DEVICE_MODIFY_CONFIG for qemu. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu(a)jp.fujitsu.com&gt; Changelog: v6->v7 - removed error message, which seems redundunt. (another patch will add new checks.) - Fixed a bug which PCI address is not assigned to a new controller. --- src/conf/domain_conf.c | 22 ++++++++++++++++++++++ src/conf/domain_conf.h | 3 ++- src/libvirt_private.syms | 2 ++ src/qemu/qemu_driver.c | 41 ++++++++++++++++++++++++++++++++++++++++- 4 files changed, 66 insertions(+), 2 deletions(-) diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index b681dc3..3e3f342 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -4859,6 +4859,19 @@ virVirtualPortProfileFormat(virBufferPtr buf, virBufferVSprintf(buf, "%s</virtualport>\n", indent); } +int virDomainDiskIndexByName(virDomainDefPtr def, const char *name) +{ + virDomainDiskDefPtr vdisk; + int i; + + for (i = 0; i < def->ndisks; i++) { + vdisk = def->disks[i]; + if (STREQ(vdisk->dst, name)) + return i; + } + return -1; +} + int virDomainDiskInsert(virDomainDefPtr def, virDomainDiskDefPtr disk) { @@ -4930,6 +4943,15 @@ void virDomainDiskRemove(virDomainDefPtr def, size_t i) } } +int virDomainDiskRemoveByName(virDomainDefPtr def, const char *name) +{ + int i = virDomainDiskIndexByName(def, name); + if (i < 0) + return -1; + virDomainDiskRemove(def, i); + return 0; +} + int virDomainControllerInsert(virDomainDefPtr def, virDomainControllerDefPtr controller) diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h index 1e8223f..b791714 100644 --- a/src/conf/domain_conf.h +++ b/src/conf/domain_conf.h @@ -1255,7 +1255,7 @@ int virDomainCpuSetParse(const char **str, int maxcpu); char *virDomainCpuSetFormat(char *cpuset, int maxcpu); - +int virDomainDiskIndexByName(virDomainDefPtr def, const char *name); int virDomainDiskInsert(virDomainDefPtr def, virDomainDiskDefPtr disk); void virDomainDiskInsertPreAlloced(virDomainDefPtr def, @@ -1263,6 +1263,7 @@ void virDomainDiskInsertPreAlloced(virDomainDefPtr def, int virDomainDiskDefAssignAddress(virCapsPtr caps, virDomainDiskDefPtr def); void virDomainDiskRemove(virDomainDefPtr def, size_t i); +int virDomainDiskRemoveByName(virDomainDefPtr def, const char *name); int virDomainControllerInsert(virDomainDefPtr def, virDomainControllerDefPtr controller); diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index b4b6c63..7459c40 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -243,11 +243,13 @@ virDomainDiskDefFree; virDomainDiskDeviceTypeToString; virDomainDiskErrorPolicyTypeFromString; virDomainDiskErrorPolicyTypeToString; +virDomainDiskIndexByName; virDomainDiskInsert; virDomainDiskInsertPreAlloced; virDomainDiskIoTypeFromString; virDomainDiskIoTypeToString; virDomainDiskRemove; +virDomainDiskRemoveByName; virDomainDiskTypeFromString; virDomainDiskTypeToString; virDomainFSDefFree; diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index a4fb1cd..4d3b416 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -4144,6 +4144,14 @@ cleanup: return ret; } +static int qemuDomainDeviceAddressFixup(virDomainDefPtr vmdef, bool pci) +{ + if (!pci && virDomainDefAddImplicitControllers(vmdef)) + return -1; + /* added controller requires PCI address */ + return qemuDomainAssignPCIAddresses(vmdef); +} + /* * Attach a device given by XML, the change will be persistent * and domain XML definition file is updated. @@ -4151,21 +4159,52 @@ cleanup: static int qemuDomainAttachDevicePersistent(virDomainDefPtr vmdef, virDomainDeviceDefPtr newdev) { + virDomainDiskDefPtr disk; + bool pci; + int ret; switch(newdev->type) { + case VIR_DOMAIN_DEVICE_DISK: + disk = newdev->data.disk; + if (virDomainDiskIndexByName(vmdef, disk->dst) >= 0) { + qemuReportError(VIR_ERR_INVALID_ARG, + _("target %s already exists."), disk->dst); + return -1; + } + if (virDomainDiskInsert(vmdef, disk)) { + virReportOOMError(); + return -1; + } + pci = (disk->bus == VIR_DOMAIN_DISK_BUS_VIRTIO); + ret = qemuDomainDeviceAddressFixup(vmdef, pci); + if (ret < 0) + virDomainDiskRemoveByName(vmdef, disk->dst); + else + newdev->data.disk = NULL; + break; default: qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", _("Sorry, the device is not supported for now")); return -1; } - return 0; + return ret; } static int qemuDomainDetachDevicePersistent(virDomainDefPtr vmdef, virDomainDeviceDefPtr device) { + virDomainDiskDefPtr disk; + switch(device->type) { + case VIR_DOMAIN_DEVICE_DISK: + disk = device->data.disk; + if (virDomainDiskRemoveByName(vmdef, disk->dst)) { + qemuReportError(VIR_ERR_INVALID_ARG, + _("no target device %s"), disk->dst); + return -1; + } + break; default: qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", _("Sorry, the device is not supported for now")); -- 1.7.4.1