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qemu: monitor: Use 'backing-mask-protocol' for blockjobs when available

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Store whether qemu supports the appropriate option for block-stream and
block-commit commands and always use it if available.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Peter Krempa 2023-11-24 15:38:11 +01:00
parent c38b4e34c8
commit abdcb46012
3 changed files with 13 additions and 0 deletions
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1
src/qemu/qemu_monitor.c
View File

@ -624,6 +624,7 @@ qemuMonitorOpenInternal(virDomainObj *vm,
if (priv) {
mon->objectAddNoWrap = virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_OBJECT_JSON);
mon->queryNamedBlockNodesFlat = virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_QMP_QUERY_NAMED_BLOCK_NODES_FLAT);
mon->blockjobMaskProtocol = virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_BLOCKJOB_BACKING_MASK_PROTOCOL);
}
if (virSetCloseExec(mon->fd) < 0) {

10
src/qemu/qemu_monitor_json.c
View File

@ -4036,6 +4036,10 @@ qemuMonitorJSONBlockCommit(qemuMonitor *mon,
g_autoptr(virJSONValue) cmd = NULL;
g_autoptr(virJSONValue) reply = NULL;
virTristateBool autodismiss = VIR_TRISTATE_BOOL_NO;
virTristateBool backingProtocol = VIR_TRISTATE_BOOL_ABSENT;
if (mon->blockjobMaskProtocol)
backingProtocol = VIR_TRISTATE_BOOL_YES;
cmd = qemuMonitorJSONMakeCommand("block-commit",
"s:device", device,
@ -4046,6 +4050,7 @@ qemuMonitorJSONBlockCommit(qemuMonitor *mon,
"S:backing-file", backingName,
"T:auto-finalize", autofinalize,
"T:auto-dismiss", autodismiss,
"T:backing-mask-protocol", backingProtocol,
NULL);
if (!cmd)
return -1;
@ -4315,6 +4320,10 @@ qemuMonitorJSONBlockStream(qemuMonitor *mon,
g_autoptr(virJSONValue) reply = NULL;
virTristateBool autofinalize = VIR_TRISTATE_BOOL_YES;
virTristateBool autodismiss = VIR_TRISTATE_BOOL_NO;
virTristateBool backingProtocol = VIR_TRISTATE_BOOL_ABSENT;
if (mon->blockjobMaskProtocol)
backingProtocol = VIR_TRISTATE_BOOL_YES;
if (!(cmd = qemuMonitorJSONMakeCommand("block-stream",
"s:device", device,
@ -4324,6 +4333,7 @@ qemuMonitorJSONBlockStream(qemuMonitor *mon,
"S:backing-file", backingName,
"T:auto-finalize", autofinalize,
"T:auto-dismiss", autodismiss,
"T:backing-mask-protocol", backingProtocol,
NULL)))
return -1;

2
src/qemu/qemu_monitor_priv.h
View File

@ -92,6 +92,8 @@ struct _qemuMonitor {
bool objectAddNoWrap;
/* query-named-block-nodes supports the 'flat' option */
bool queryNamedBlockNodesFlat;
/* use the backing-mask-protocol flag of block-commit/stream */
bool blockjobMaskProtocol;
};