[libvirt PATCH v2 0/2] reword and add external snapshot related capabilities
Pavel Hrdina (2): capabilities: reword disksnapshot feature to mention creating snapshots capabilities: report full external snapshot support docs/formatcaps.rst | 12 +++++++++--- src/conf/capabilities.c | 1 + src/conf/capabilities.h | 1 + src/conf/schemas/capability.rng | 5 +++++ src/qemu/qemu_capabilities.c | 1 + tests/qemucaps2xmloutdata/caps.aarch64+hvf.xml | 1 + tests/qemucaps2xmloutdata/caps.aarch64.xml | 1 + tests/qemucaps2xmloutdata/caps.ppc.xml | 1 + tests/qemucaps2xmloutdata/caps.ppc64.xml | 1 + tests/qemucaps2xmloutdata/caps.riscv64.xml | 1 + tests/qemucaps2xmloutdata/caps.s390x.xml | 1 + tests/qemucaps2xmloutdata/caps.sparc.xml | 1 + tests/qemucaps2xmloutdata/caps.x86_64+hvf.xml | 1 + tests/qemucaps2xmloutdata/caps.x86_64.xml | 1 + 14 files changed, 26 insertions(+), 3 deletions(-) -- 2.41.0
Libvirt supports creating snapshots for a long time but the wording of the feature may imply that libvirt supports external snapshots in general but that is not true as users were not able to use APIs to delete or revert external snapshots. Signed-off-by: Pavel Hrdina <phrdina@redhat.com> --- docs/formatcaps.rst | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/docs/formatcaps.rst b/docs/formatcaps.rst index f7e5342654..bb8bc663d2 100644 --- a/docs/formatcaps.rst +++ b/docs/formatcaps.rst @@ -131,9 +131,9 @@ The ``<guest/>`` element will typically wrap up the following elements: :since:`Since 0.8.8` ``disksnapshot`` If this element is present, the ``default`` attribute describes whether - external disk snapshots are supported. If absent, external snapshots may - still be supported, but it requires attempting the API and checking for an - error to find out for sure. :since:`Since 1.2.3` + creating external disk snapshots is supported. If absent, creating external + snapshots may still be supported, but it requires attempting the API and + checking for an error to find out for sure. :since:`Since 1.2.3` Examples ~~~~~~~~ -- 2.41.0
On Thu, Aug 24, 2023 at 18:21:40 +0200, Pavel Hrdina wrote:
Libvirt supports creating snapshots for a long time but the wording of the feature may imply that libvirt supports external snapshots in general but that is not true as users were not able to use APIs to delete or revert external snapshots.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com> --- docs/formatcaps.rst | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/docs/formatcaps.rst b/docs/formatcaps.rst index f7e5342654..bb8bc663d2 100644 --- a/docs/formatcaps.rst +++ b/docs/formatcaps.rst @@ -131,9 +131,9 @@ The ``<guest/>`` element will typically wrap up the following elements: :since:`Since 0.8.8` ``disksnapshot`` If this element is present, the ``default`` attribute describes whether - external disk snapshots are supported. If absent, external snapshots may - still be supported, but it requires attempting the API and checking for an - error to find out for sure. :since:`Since 1.2.3` + creating external disk snapshots is supported. If absent, creating external + snapshots may still be supported, but it requires attempting the API and
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Now that deleting and reverting external snapshots is implemented we can report that in capabilities so management applications can use that information and start using external snapshots. Signed-off-by: Pavel Hrdina <phrdina@redhat.com> --- docs/formatcaps.rst | 6 ++++++ src/conf/capabilities.c | 1 + src/conf/capabilities.h | 1 + src/conf/schemas/capability.rng | 5 +++++ src/qemu/qemu_capabilities.c | 1 + tests/qemucaps2xmloutdata/caps.aarch64+hvf.xml | 1 + tests/qemucaps2xmloutdata/caps.aarch64.xml | 1 + tests/qemucaps2xmloutdata/caps.ppc.xml | 1 + tests/qemucaps2xmloutdata/caps.ppc64.xml | 1 + tests/qemucaps2xmloutdata/caps.riscv64.xml | 1 + tests/qemucaps2xmloutdata/caps.s390x.xml | 1 + tests/qemucaps2xmloutdata/caps.sparc.xml | 1 + tests/qemucaps2xmloutdata/caps.x86_64+hvf.xml | 1 + tests/qemucaps2xmloutdata/caps.x86_64.xml | 1 + 14 files changed, 23 insertions(+) diff --git a/docs/formatcaps.rst b/docs/formatcaps.rst index bb8bc663d2..255180135d 100644 --- a/docs/formatcaps.rst +++ b/docs/formatcaps.rst @@ -134,6 +134,11 @@ The ``<guest/>`` element will typically wrap up the following elements: creating external disk snapshots is supported. If absent, creating external snapshots may still be supported, but it requires attempting the API and checking for an error to find out for sure. :since:`Since 1.2.3` + ``externalSnapshot`` + If this element is present, the hypervisor supports deleting and + reverting external snapshots including memory state. Creating external + snapshots is supported for long time. Management applications can now + switch from internal snapshots to external snapshots. :since:`Since 9.7.0` Examples ~~~~~~~~ @@ -318,6 +323,7 @@ capabilities enabled in the chip and BIOS you will see: <cpuselection/> <deviceboot/> <disksnapshot default='on' toggle='no'/> + <externalSnapshot/> </features> </guest> diff --git a/src/conf/capabilities.c b/src/conf/capabilities.c index 56768ce6e0..34f04cb7d3 100644 --- a/src/conf/capabilities.c +++ b/src/conf/capabilities.c @@ -508,6 +508,7 @@ static const struct virCapsGuestFeatureInfo virCapsGuestFeatureInfos[VIR_CAPS_GU [VIR_CAPS_GUEST_FEATURE_TYPE_DEVICEBOOT] = { "deviceboot", false }, [VIR_CAPS_GUEST_FEATURE_TYPE_DISKSNAPSHOT] = { "disksnapshot", true }, [VIR_CAPS_GUEST_FEATURE_TYPE_HAP] = { "hap", true }, + [VIR_CAPS_GUEST_FEATURE_TYPE_EXTERNAL_SNAPSHOT] = { "externalSnapshot", false }, }; diff --git a/src/conf/capabilities.h b/src/conf/capabilities.h index c78e3e52fa..9eaf6e2807 100644 --- a/src/conf/capabilities.h +++ b/src/conf/capabilities.h @@ -40,6 +40,7 @@ typedef enum { VIR_CAPS_GUEST_FEATURE_TYPE_DEVICEBOOT, VIR_CAPS_GUEST_FEATURE_TYPE_DISKSNAPSHOT, VIR_CAPS_GUEST_FEATURE_TYPE_HAP, + VIR_CAPS_GUEST_FEATURE_TYPE_EXTERNAL_SNAPSHOT, VIR_CAPS_GUEST_FEATURE_TYPE_LAST } virCapsGuestFeatureType; diff --git a/src/conf/schemas/capability.rng b/src/conf/schemas/capability.rng index 83b414961a..b1968df258 100644 --- a/src/conf/schemas/capability.rng +++ b/src/conf/schemas/capability.rng @@ -493,6 +493,11 @@ <empty/> </element> </optional> + <optional> + <element name="externalSnapshot"> + <empty/> + </element> + </optional> </interleave> </element> </define> diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c index 40eacf0f4d..05cc11218a 100644 --- a/src/qemu/qemu_capabilities.c +++ b/src/qemu/qemu_capabilities.c @@ -1121,6 +1121,7 @@ virQEMUCapsInitGuestFromBinary(virCaps *caps, virCapabilitiesAddGuestFeature(guest, VIR_CAPS_GUEST_FEATURE_TYPE_DEVICEBOOT); virCapabilitiesAddGuestFeatureWithToggle(guest, VIR_CAPS_GUEST_FEATURE_TYPE_DISKSNAPSHOT, true, false); + virCapabilitiesAddGuestFeature(guest, VIR_CAPS_GUEST_FEATURE_TYPE_EXTERNAL_SNAPSHOT); if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_TCG)) { virCapabilitiesAddGuestDomain(guest, VIR_DOMAIN_VIRT_QEMU, diff --git a/tests/qemucaps2xmloutdata/caps.aarch64+hvf.xml b/tests/qemucaps2xmloutdata/caps.aarch64+hvf.xml index b53a886b90..b9a5b5a1d6 100644 --- a/tests/qemucaps2xmloutdata/caps.aarch64+hvf.xml +++ b/tests/qemucaps2xmloutdata/caps.aarch64+hvf.xml @@ -21,6 +21,7 @@ <cpuselection/> <deviceboot/> <disksnapshot default='on' toggle='no'/> + <externalSnapshot/> </features> </guest> diff --git a/tests/qemucaps2xmloutdata/caps.aarch64.xml b/tests/qemucaps2xmloutdata/caps.aarch64.xml index 5dca6d3102..61512ed740 100644 --- a/tests/qemucaps2xmloutdata/caps.aarch64.xml +++ b/tests/qemucaps2xmloutdata/caps.aarch64.xml @@ -21,6 +21,7 @@ <cpuselection/> <deviceboot/> <disksnapshot default='on' toggle='no'/> + <externalSnapshot/> </features> </guest> diff --git a/tests/qemucaps2xmloutdata/caps.ppc.xml b/tests/qemucaps2xmloutdata/caps.ppc.xml index e7ba391795..86d6b85ae0 100644 --- a/tests/qemucaps2xmloutdata/caps.ppc.xml +++ b/tests/qemucaps2xmloutdata/caps.ppc.xml @@ -19,6 +19,7 @@ <cpuselection/> <deviceboot/> <disksnapshot default='on' toggle='no'/> + <externalSnapshot/> </features> </guest> diff --git a/tests/qemucaps2xmloutdata/caps.ppc64.xml b/tests/qemucaps2xmloutdata/caps.ppc64.xml index 85623f3980..90859f9594 100644 --- a/tests/qemucaps2xmloutdata/caps.ppc64.xml +++ b/tests/qemucaps2xmloutdata/caps.ppc64.xml @@ -20,6 +20,7 @@ <cpuselection/> <deviceboot/> <disksnapshot default='on' toggle='no'/> + <externalSnapshot/> </features> </guest> diff --git a/tests/qemucaps2xmloutdata/caps.riscv64.xml b/tests/qemucaps2xmloutdata/caps.riscv64.xml index 09b7eb7f2f..c6fa950211 100644 --- a/tests/qemucaps2xmloutdata/caps.riscv64.xml +++ b/tests/qemucaps2xmloutdata/caps.riscv64.xml @@ -19,6 +19,7 @@ <cpuselection/> <deviceboot/> <disksnapshot default='on' toggle='no'/> + <externalSnapshot/> </features> </guest> diff --git a/tests/qemucaps2xmloutdata/caps.s390x.xml b/tests/qemucaps2xmloutdata/caps.s390x.xml index bb82a15040..6379ab73e6 100644 --- a/tests/qemucaps2xmloutdata/caps.s390x.xml +++ b/tests/qemucaps2xmloutdata/caps.s390x.xml @@ -20,6 +20,7 @@ <cpuselection/> <deviceboot/> <disksnapshot default='on' toggle='no'/> + <externalSnapshot/> </features> </guest> diff --git a/tests/qemucaps2xmloutdata/caps.sparc.xml b/tests/qemucaps2xmloutdata/caps.sparc.xml index 9d977c4102..b5b158e430 100644 --- a/tests/qemucaps2xmloutdata/caps.sparc.xml +++ b/tests/qemucaps2xmloutdata/caps.sparc.xml @@ -19,6 +19,7 @@ <cpuselection/> <deviceboot/> <disksnapshot default='on' toggle='no'/> + <externalSnapshot/> </features> </guest> diff --git a/tests/qemucaps2xmloutdata/caps.x86_64+hvf.xml b/tests/qemucaps2xmloutdata/caps.x86_64+hvf.xml index 356819a6c6..f5e49ba4db 100644 --- a/tests/qemucaps2xmloutdata/caps.x86_64+hvf.xml +++ b/tests/qemucaps2xmloutdata/caps.x86_64+hvf.xml @@ -22,6 +22,7 @@ <cpuselection/> <deviceboot/> <disksnapshot default='on' toggle='no'/> + <externalSnapshot/> </features> </guest> diff --git a/tests/qemucaps2xmloutdata/caps.x86_64.xml b/tests/qemucaps2xmloutdata/caps.x86_64.xml index 35359780c4..8dd1439a80 100644 --- a/tests/qemucaps2xmloutdata/caps.x86_64.xml +++ b/tests/qemucaps2xmloutdata/caps.x86_64.xml @@ -22,6 +22,7 @@ <cpuselection/> <deviceboot/> <disksnapshot default='on' toggle='no'/> + <externalSnapshot/> </features> </guest> -- 2.41.0
On Thu, Aug 24, 2023 at 18:21:41 +0200, Pavel Hrdina wrote:
Now that deleting and reverting external snapshots is implemented we can report that in capabilities so management applications can use that information and start using external snapshots.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com> --- docs/formatcaps.rst | 6 ++++++ src/conf/capabilities.c | 1 + src/conf/capabilities.h | 1 + src/conf/schemas/capability.rng | 5 +++++ src/qemu/qemu_capabilities.c | 1 + tests/qemucaps2xmloutdata/caps.aarch64+hvf.xml | 1 + tests/qemucaps2xmloutdata/caps.aarch64.xml | 1 + tests/qemucaps2xmloutdata/caps.ppc.xml | 1 + tests/qemucaps2xmloutdata/caps.ppc64.xml | 1 + tests/qemucaps2xmloutdata/caps.riscv64.xml | 1 + tests/qemucaps2xmloutdata/caps.s390x.xml | 1 + tests/qemucaps2xmloutdata/caps.sparc.xml | 1 + tests/qemucaps2xmloutdata/caps.x86_64+hvf.xml | 1 + tests/qemucaps2xmloutdata/caps.x86_64.xml | 1 + 14 files changed, 23 insertions(+)
diff --git a/docs/formatcaps.rst b/docs/formatcaps.rst index bb8bc663d2..255180135d 100644 --- a/docs/formatcaps.rst +++ b/docs/formatcaps.rst @@ -134,6 +134,11 @@ The ``<guest/>`` element will typically wrap up the following elements: creating external disk snapshots is supported. If absent, creating external snapshots may still be supported, but it requires attempting the API and checking for an error to find out for sure. :since:`Since 1.2.3` + ``externalSnapshot`` + If this element is present, the hypervisor supports deleting and + reverting external snapshots including memory state. Creating external + snapshots is supported for long time.
"Support for creation of external snapshots is reported via the `disksnapshot` feature flag." Reviewed-by: Peter Krempa <pkrempa@redhat.com>
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Pavel Hrdina -
Peter Krempa