[libvirt] [PATCH v2 2/7] qemu: domain: store and update panic info

[Michal Privoznik]

On 3/25/19 9:04 AM, Bjoern Walk wrote:
> Let's store additional state information in the hypervisor-specific
> private data to virDomainObj. For now, just consider panic state in QEMU
> domains for which additional information is available from the guest
> crash event handler.
> 
> Reviewed-by: Boris Fiuczynski <fiuczy at linux.ibm.com>
> Signed-off-by: Bjoern Walk <bwalk at linux.ibm.com>
> ---
>   src/qemu/qemu_domain.c | 36 ++++++++++++++++++++++++++++++++++++
>   src/qemu/qemu_domain.h |  5 +++++
>   src/qemu/qemu_driver.c |  2 ++
>   3 files changed, 43 insertions(+)
> 
> diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
> index c6e07bcb..fb43035e 100644
> --- a/src/qemu/qemu_domain.c
> +++ b/src/qemu/qemu_domain.c
> @@ -2052,6 +2052,9 @@ qemuDomainObjPrivateDataClear(qemuDomainObjPrivatePtr priv)
>       virBitmapFree(priv->migrationCaps);
>       priv->migrationCaps = NULL;
>   
> +    qemuDomainStatePanicInfoFree(priv->panicInfo);
> +    priv->panicInfo = NULL;
> +
>       qemuDomainObjResetJob(priv);
>       qemuDomainObjResetAsyncJob(priv);
>   }
> @@ -14069,6 +14072,39 @@ qemuDomainStatePanicInfoFormatMsg(qemuDomainStatePanicInfoPtr info)
>   }
>   
>   
> +void
> +qemuDomainStatePanicInfoSet(virDomainObjPtr vm,
> +                            qemuDomainStatePanicInfoPtr info)
> +{
> +    qemuDomainObjPrivatePtr priv = vm->privateData;
> +
> +    if (!priv->panicInfo && VIR_ALLOC(priv->panicInfo) < 0)
> +        return;
> +
> +    priv->panicInfo->type = info->type;
> +
> +    switch (info->type) {
> +    case QEMU_DOMAIN_STATE_PANIC_INFO_TYPE_HYPERV:
> +        priv->panicInfo->data.hyperv.arg1 = info->data.hyperv.arg1;
> +        priv->panicInfo->data.hyperv.arg2 = info->data.hyperv.arg2;
> +        priv->panicInfo->data.hyperv.arg3 = info->data.hyperv.arg3;
> +        priv->panicInfo->data.hyperv.arg4 = info->data.hyperv.arg4;
> +        priv->panicInfo->data.hyperv.arg5 = info->data.hyperv.arg5;
> +        break;
> +    case QEMU_DOMAIN_STATE_PANIC_INFO_TYPE_S390:
> +        priv->panicInfo->data.s390.core = info->data.s390.core;
> +        priv->panicInfo->data.s390.psw_mask = info->data.s390.psw_mask;
> +        priv->panicInfo->data.s390.psw_addr = info->data.s390.psw_addr;
> +        ignore_value(VIR_STRDUP(priv->panicInfo->data.s390.reason,
> +                                info->data.s390.reason));
> +        break;
> +    case QEMU_DOMAIN_STATE_PANIC_INFO_TYPE_NONE:
> +    case QEMU_DOMAIN_STATE_PANIC_INFO_TYPE_LAST:
> +        break;
> +    }

How about memcpy() and then just STRDUP() in the one place we need to?

No need to send v3 for that, just asking and if so, I can fix that 
before pushing.

My reasoning is that it might be easy to forget update this function if 
qemuDomainStatePanicInfo struct gets a new member.

Michal