Re: [libvirt PATCH 2/2] qemu: implement setting of rotation rate for SCSI/IDE disks

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On a Wednesday in 2021, Daniel P. Berrangé wrote:
Signed-off-by: Daniel P. Berrangé <berrange@xxxxxxxxxx>
---
src/qemu/qemu_capabilities.c                  |  2 +
src/qemu/qemu_capabilities.h                  |  1 +
src/qemu/qemu_command.c                       |  3 +
src/qemu/qemu_validate.c                      | 22 ++++++++
.../caps_2.12.0.aarch64.xml                   |  1 +
.../caps_4.0.0.aarch64.xml                    |  1 +
.../qemucapabilitiesdata/caps_4.0.0.ppc64.xml |  1 +
.../caps_4.0.0.riscv32.xml                    |  1 +
.../caps_4.0.0.riscv64.xml                    |  1 +
.../qemucapabilitiesdata/caps_4.0.0.s390x.xml |  1 +
.../caps_4.0.0.x86_64.xml                     |  1 +
.../caps_4.1.0.x86_64.xml                     |  1 +
.../caps_4.2.0.aarch64.xml                    |  1 +
.../qemucapabilitiesdata/caps_4.2.0.ppc64.xml |  1 +
.../qemucapabilitiesdata/caps_4.2.0.s390x.xml |  1 +
.../caps_4.2.0.x86_64.xml                     |  1 +
.../caps_5.0.0.aarch64.xml                    |  1 +
.../qemucapabilitiesdata/caps_5.0.0.ppc64.xml |  1 +
.../caps_5.0.0.riscv64.xml                    |  1 +
.../caps_5.0.0.x86_64.xml                     |  1 +
.../qemucapabilitiesdata/caps_5.1.0.sparc.xml |  1 +
.../caps_5.1.0.x86_64.xml                     |  1 +
.../caps_5.2.0.aarch64.xml                    |  1 +
.../qemucapabilitiesdata/caps_5.2.0.ppc64.xml |  1 +
.../caps_5.2.0.riscv64.xml                    |  1 +
.../qemucapabilitiesdata/caps_5.2.0.s390x.xml |  1 +
.../caps_5.2.0.x86_64.xml                     |  1 +
.../caps_6.0.0.x86_64.xml                     |  1 +
.../disk-rotation.x86_64-latest.args          | 56 +++++++++++++++++++
tests/qemuxml2argvdata/disk-rotation.xml      | 38 +++++++++++++
tests/qemuxml2argvtest.c                      |  1 +
.../disk-rotation.x86_64-latest.xml           | 55 ++++++++++++++++++
tests/qemuxml2xmltest.c                       |  1 +
33 files changed, 203 insertions(+)
create mode 100644 tests/qemuxml2argvdata/disk-rotation.x86_64-latest.args
create mode 100644 tests/qemuxml2argvdata/disk-rotation.xml
create mode 100644 tests/qemuxml2xmloutdata/disk-rotation.x86_64-latest.xml

diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index deedff2e9f..ea24e2d6a5 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -624,6 +624,7 @@ VIR_ENUM_IMPL(virQEMUCaps,
              "audiodev",
              "blockdev-backup",
              "object.qapified",
+              "rotation-rate",
    );


@@ -1440,6 +1441,7 @@ static struct virQEMUCapsDevicePropsFlags virQEMUCapsDevicePropsSCSIDisk[] = {
    { "write-cache", QEMU_CAPS_DISK_WRITE_CACHE, NULL },
    { "device_id", QEMU_CAPS_SCSI_DISK_DEVICE_ID, NULL },
    { "werror", QEMU_CAPS_STORAGE_WERROR, NULL },
+    { "rotation_rate", QEMU_CAPS_ROTATION_RATE, NULL },
};

static struct virQEMUCapsDevicePropsFlags virQEMUCapsDevicePropsIDEDrive[] = {
diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h
index da51a788fa..a70c00a265 100644
--- a/src/qemu/qemu_capabilities.h
+++ b/src/qemu/qemu_capabilities.h
@@ -604,6 +604,7 @@ typedef enum { /* virQEMUCapsFlags grouping marker for syntax-check */
    QEMU_CAPS_AUDIODEV, /* -audiodev instead of QEMU_AUDIO_DRV */
    QEMU_CAPS_BLOCKDEV_BACKUP, /* qemu supports the blockdev-backup job */
    QEMU_CAPS_OBJECT_QAPIFIED, /* parameters for object-add are formally described */
+    QEMU_CAPS_ROTATION_RATE, /* scsi-disk / ide-drive rotation-rate prop */


You mention both SCSI and IDE in the comment, but only check props for
SCSI. But I guess it would be rare to have one without the other.

    QEMU_CAPS_LAST /* this must always be the last item */
} virQEMUCapsFlags;

Reviewed-by: Ján Tomko <jtomko@xxxxxxxxxx>

Jano

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