At 03/16/2011 02:45 PM, KAMEZAWA Hiroyuki Write:
>>From ddcd9cb499dd73dfc91c9f2cc97c064d6dda17fc Mon Sep 17 00:00:00 2001
> From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
> Date: Wed, 16 Mar 2011 14:05:21 +0900
> Subject: [PATCHv5 2/3] libvirt/qemu - support persistent modification of qemu disks
>
> support changes of disks by VIR_DOMAIN_DEVICE_MODIFY_CONFIG
> for qemu.
>
> Changelog v4->v5:
> - moved some functions to domain_conf.c
> - added virDomainDefAddImplicitControllers() for ide/scsi
> - report OOM.
> - clean up.
>
> Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
> ---
> src/conf/domain_conf.c | 22 ++++++++++++++++++++++
> src/conf/domain_conf.h | 3 ++-
> src/libvirt_private.syms | 2 ++
> src/qemu/qemu_driver.c | 29 +++++++++++++++++++++++++++++
> 4 files changed, 55 insertions(+), 1 deletions(-)
>
> diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
> index 16e1291..1d39481 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 30aeccc..320ca13 100644
> --- a/src/conf/domain_conf.h
> +++ b/src/conf/domain_conf.h
> @@ -1261,7 +1261,7 @@ 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,
> @@ -1269,6 +1269,7 @@ 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 c88d934..1761dfb 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 dbd5bd3..d6d7ad0 100644
> --- a/src/qemu/qemu_driver.c
> +++ b/src/qemu/qemu_driver.c
> @@ -4137,8 +4137,27 @@ cleanup:
> static int qemuDomainAttachDevicePersistent(virDomainDefPtr vmdef,
> virDomainDeviceDefPtr newdev)
> {
> + virDomainDiskDefPtr disk;
>
> 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;
> + }
> + if (disk->bus == VIR_DOMAIN_DISK_BUS_VIRTIO) {
> + if (qemuDomainAssignPCIAddresses(vmdef) < 0)
> + return -1;
> + } else if (virDomainDefAddImplicitControllers(vmdef) < 0)
> + return -1;
When qemuDomainAssignPCIAddresses() or virDomainDefAddImplicitControllers() failed,
we should remove disk from vmdef, otherwise, it will cause libvirtd crashed.
> + newdev->data.disk = NULL;
> + break;
> default:
> qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
> _("Sorry, the device is not supported for now"));
> @@ -4151,7 +4170,17 @@ static int qemuDomainAttachDevicePersistent(virDomainDefPtr vmdef,
> 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"));
--
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