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Re: [libvirt] [PATCH 12/14] conf: convert sclp/sclplm <console> as <serial>



Andrea Bolognani <abologna redhat com> [2017-11-15, 12:50PM +0100]:
> From: Pino Toscano <ptoscano redhat com>
> 
> In case we are allowed to break the ABI of a s390/s390x guest, then
> convert the first sclp/sclplm console from <console> to <serial>, just
> like it is done on other architectures.
> 
> Signed-off-by: Pino Toscano <ptoscano redhat com>
> ---
>  src/conf/domain_conf.c                             | 39 ++++++++++++++++++++--
>  .../qemuxml2argv-s390-console2serial.args          | 22 ++++++++++++
>  .../qemuxml2argv-s390-console2serial.xml           | 19 +++++++++++
>  tests/qemuxml2argvtest.c                           |  6 ++++
>  4 files changed, 83 insertions(+), 3 deletions(-)
>  create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-s390-console2serial.args
>  create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-s390-console2serial.xml
> 
> diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
> index 9a3cdc777..14b611602 100644
> --- a/src/conf/domain_conf.c
> +++ b/src/conf/domain_conf.c
> @@ -3966,9 +3966,35 @@ virDomainDefPostParseMemory(virDomainDefPtr def,
>  }
> 
> 
> +static virDomainChrSerialTargetType
> +virDomainChrConsoleTargetTypeToSerial(virDomainChrConsoleTargetType type)
> +{
> +    switch (type) {
> +    case VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_SCLP:
> +        return VIR_DOMAIN_CHR_SERIAL_TARGET_TYPE_SCLP;
> +
> +    case VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_SCLPLM:
> +        return VIR_DOMAIN_CHR_SERIAL_TARGET_TYPE_SCLPLM;
> +
> +    case VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_NONE:
> +    case VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_SERIAL:
> +    case VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_XEN:
> +    case VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_UML:
> +    case VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_VIRTIO:
> +    case VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_LXC:
> +    case VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_OPENVZ:
> +    case VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_LAST:
> +        /* Return the default at the end, to please strict compilers. */
> +        break;
> +    }
> +
> +    return VIR_DOMAIN_CHR_SERIAL_TARGET_TYPE_NONE;
> +}
> +
> +
>  static int
>  virDomainDefAddConsoleCompat(virDomainDefPtr def,
> -                             unsigned int parseFlags ATTRIBUTE_UNUSED)
> +                             unsigned int parseFlags)
>  {
>      size_t i;
> 
> @@ -3985,6 +4011,10 @@ virDomainDefAddConsoleCompat(virDomainDefPtr def,
>       *
>       * We then fill def->consoles[0] with a stub just so we get sequencing
>       * correct for consoles > 0
> +     *
> +     * sclp/sclplm consoles (in s390 and s390x guests) are converted to serial
> +     * only when we can update the ABI of the guest, to avoid breaking
> +     * migrations to old libvirt.
>       */
> 
>      /* Only the first console (if there are any) can be of type serial,
> @@ -4001,7 +4031,10 @@ virDomainDefAddConsoleCompat(virDomainDefPtr def,
>      }
>      if (def->nconsoles > 0 && def->os.type == VIR_DOMAIN_OSTYPE_HVM &&
>          (def->consoles[0]->targetType == VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_SERIAL ||
> -         def->consoles[0]->targetType == VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_NONE)) {
> +         def->consoles[0]->targetType == VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_NONE ||
> +         ((def->consoles[0]->targetType == VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_SCLP ||
> +           def->consoles[0]->targetType == VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_SCLPLM) &&
> +          (parseFlags & VIR_DOMAIN_DEF_PARSE_ABI_UPDATE)))) {

This gets a bit hard to parse, maybe we can extract the conditional?

> 
>          /* If there isn't a corresponding serial port:
>           *  - create one and set, the console to be an alias for it
> @@ -4021,7 +4054,7 @@ virDomainDefAddConsoleCompat(virDomainDefPtr def,
> 
>              /* modify it to be a serial port */
>              def->serials[0]->deviceType = VIR_DOMAIN_CHR_DEVICE_TYPE_SERIAL;
> -            def->serials[0]->targetType = VIR_DOMAIN_CHR_SERIAL_TARGET_TYPE_NONE;
> +            def->serials[0]->targetType = virDomainChrConsoleTargetTypeToSerial(def->serials[0]->targetType);
>              def->serials[0]->target.port = 0;
>          } else {
>              /* if the console source doesn't match */
> diff --git a/tests/qemuxml2argvdata/qemuxml2argv-s390-console2serial.args b/tests/qemuxml2argvdata/qemuxml2argv-s390-console2serial.args
> new file mode 100644
> index 000000000..20968f794
> --- /dev/null
> +++ b/tests/qemuxml2argvdata/qemuxml2argv-s390-console2serial.args
> @@ -0,0 +1,22 @@
> +LC_ALL=C \
> +PATH=/bin \
> +HOME=/home/test \
> +USER=test \
> +LOGNAME=test \
> +QEMU_AUDIO_DRV=none \
> +/usr/bin/qemu-system-s390x \
> +-name QEMUGuest1 \
> +-S \
> +-M s390-ccw-virtio \
> +-m 214 \
> +-smp 1,sockets=1,cores=1,threads=1 \
> +-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
> +-nographic \
> +-nodefconfig \
> +-nodefaults \
> +-chardev socket,id=charmonitor,path=/tmp/lib/domain--1-QEMUGuest1/monitor.sock,\
> +server,nowait \
> +-mon chardev=charmonitor,id=monitor,mode=readline \
> +-boot c \
> +-chardev pty,id=charserial0 \
> +-device sclpconsole,chardev=charserial0,id=serial0
> diff --git a/tests/qemuxml2argvdata/qemuxml2argv-s390-console2serial.xml b/tests/qemuxml2argvdata/qemuxml2argv-s390-console2serial.xml
> new file mode 100644
> index 000000000..5f02ec8a0
> --- /dev/null
> +++ b/tests/qemuxml2argvdata/qemuxml2argv-s390-console2serial.xml
> @@ -0,0 +1,19 @@
> +<domain type='qemu'>
> +  <name>QEMUGuest1</name>
> +  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
> +  <memory unit='KiB'>219100</memory>
> +  <vcpu placement='static'>1</vcpu>
> +  <os>
> +    <type arch="s390x" machine="s390-ccw-virtio">hvm</type>
> +  </os>
> +  <devices>
> +    <emulator>/usr/bin/qemu-system-s390x</emulator>
> +    <!-- Since this test is run with the flag VIR_DOMAIN_DEF_PARSE_ABI_UPDATE,
> +         then it will result in a <serial> element created for it, and thus
> +         a serial chardev for QEMU. -->
> +    <console type='pty'>
> +      <target type='sclp'/>
> +    </console>
> +    <memballoon model='none'/>
> +  </devices>
> +</domain>
> diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
> index a280a8a85..6cc7731a7 100644
> --- a/tests/qemuxml2argvtest.c
> +++ b/tests/qemuxml2argvtest.c
> @@ -2061,6 +2061,12 @@ mymain(void)
>              QEMU_CAPS_VIRTIO_CCW,
>              QEMU_CAPS_VIRTIO_S390,
>              QEMU_CAPS_SCLP_S390);
> +    DO_TEST_FULL("s390-console2serial", NULL, -1, 0,
> +                 VIR_DOMAIN_DEF_PARSE_ABI_UPDATE, GIC_NONE,
> +                 QEMU_CAPS_NODEFCONFIG,
> +                 QEMU_CAPS_VIRTIO_CCW,
> +                 QEMU_CAPS_VIRTIO_S390,
> +                 QEMU_CAPS_SCLP_S390);
> 
>      DO_TEST("ppc-dtb",
>              QEMU_CAPS_KVM,
> -- 
> 2.13.6
> 
> --
> libvir-list mailing list
> libvir-list redhat com
> https://www.redhat.com/mailman/listinfo/libvir-list
> 

Rest looks fine and initial smoke testing was all good.

Reviewed-by: Bjoern Walk <bwalk linux vnet ibm com>

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