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qemu: Remove support for legacy block jobs

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Block job QMP commands with underscores rather than dashes were never
released in upstream qemu, (they were added, but modified in the same
release [1]), but a certain distro managed to backport the version in the
middle.

The change also slightly modified semantics for the abort command, which
made us have a lot of code which was only ever present in certain
downstream distros.

Clean the upstream code from the legacy cruft and support only the
upstream implementations.

[1] See qemu commit v1.0-2176-gdb58f9c060

Reviewed-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Peter Krempa 2017-09-13 15:28:46 +02:00
parent 23706c1708
commit 2350d10149
3 changed files with 19 additions and 56 deletions
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13
src/qemu/qemu_domain.c
View File

@ -6434,29 +6434,22 @@ qemuDomainGetMonitor(virDomainObjPtr vm)
/**
* qemuDomainSupportsBlockJobs:
* @vm: domain object
* @modern: pointer to bool that returns whether modern block jobs are supported
*
* Returns -1 in case when qemu does not support block jobs at all. Otherwise
* returns 0 and optionally fills @modern to denote that modern (async) block
* jobs are supported.
* returns 0.
*/
int
qemuDomainSupportsBlockJobs(virDomainObjPtr vm,
bool *modern)
qemuDomainSupportsBlockJobs(virDomainObjPtr vm)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
bool asynchronous = virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_BLOCKJOB_ASYNC);
bool synchronous = virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_BLOCKJOB_SYNC);
if (!synchronous && !asynchronous) {
if (!asynchronous) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("block jobs not supported with this QEMU binary"));
return -1;
}
if (modern)
*modern = asynchronous;
return 0;
}

2
src/qemu/qemu_domain.h
View File

@ -715,7 +715,7 @@ int qemuDomainJobInfoToParams(qemuDomainJobInfoPtr jobInfo,
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2)
ATTRIBUTE_NONNULL(3) ATTRIBUTE_NONNULL(4);
int qemuDomainSupportsBlockJobs(virDomainObjPtr vm, bool *modern)
int qemuDomainSupportsBlockJobs(virDomainObjPtr vm)
ATTRIBUTE_NONNULL(1);
bool qemuDomainDiskBlockJobIsActive(virDomainDiskDefPtr disk);
bool qemuDomainHasBlockjob(virDomainObjPtr vm, bool copy_only)

60
src/qemu/qemu_driver.c
View File

@ -16413,7 +16413,6 @@ qemuDomainBlockPullCommon(virQEMUDriverPtr driver,
{
qemuDomainObjPrivatePtr priv = vm->privateData;
char *device = NULL;
bool modern;
virDomainDiskDefPtr disk;
virStorageSourcePtr baseSource = NULL;
unsigned int baseIndex = 0;
@ -16438,25 +16437,9 @@ qemuDomainBlockPullCommon(virQEMUDriverPtr driver,
goto endjob;
}
if (qemuDomainSupportsBlockJobs(vm, &modern) < 0)
if (qemuDomainSupportsBlockJobs(vm) < 0)
goto endjob;
if (!modern) {
if (base) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("partial block pull not supported with this "
"QEMU binary"));
goto endjob;
}
if (bandwidth) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("setting bandwidth at start of block pull not "
"supported with this QEMU binary"));
goto endjob;
}
}
if (!(disk = qemuDomainDiskByName(vm->def, path)))
goto endjob;
@ -16511,7 +16494,7 @@ qemuDomainBlockPullCommon(virQEMUDriverPtr driver,
baseSource);
if (!baseSource || basePath)
ret = qemuMonitorBlockStream(priv->mon, device, basePath, backingPath,
speed, modern);
speed, true);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
ret = -1;
@ -16542,7 +16525,6 @@ qemuDomainBlockJobAbort(virDomainPtr dom,
virDomainDiskDefPtr disk = NULL;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
bool save = false;
bool modern;
bool pivot = !!(flags & VIR_DOMAIN_BLOCK_JOB_ABORT_PIVOT);
bool async = !!(flags & VIR_DOMAIN_BLOCK_JOB_ABORT_ASYNC);
virDomainObjPtr vm;
@ -16566,7 +16548,7 @@ qemuDomainBlockJobAbort(virDomainPtr dom,
goto endjob;
}
if (qemuDomainSupportsBlockJobs(vm, &modern) < 0)
if (qemuDomainSupportsBlockJobs(vm) < 0)
goto endjob;
if (!(disk = qemuDomainDiskByName(vm->def, path)))
@ -16583,7 +16565,7 @@ qemuDomainBlockJobAbort(virDomainPtr dom,
goto endjob;
}
if (modern && !async)
if (!async)
qemuBlockJobSyncBegin(disk);
if (pivot) {
@ -16596,7 +16578,7 @@ qemuDomainBlockJobAbort(virDomainPtr dom,
}
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorBlockJobCancel(qemuDomainGetMonitor(vm), device, modern);
ret = qemuMonitorBlockJobCancel(qemuDomainGetMonitor(vm), device, true);
if (qemuDomainObjExitMonitor(driver, vm) < 0) {
ret = -1;
goto endjob;
@ -16623,25 +16605,14 @@ qemuDomainBlockJobAbort(virDomainPtr dom,
* while still holding the VM job, to prevent newly scheduled
* block jobs from confusing us. */
if (!async) {
if (!modern) {
/* Older qemu that lacked async reporting also lacked
* blockcopy and active commit, so we can hardcode the
* event to pull and let qemuBlockJobEventProcess() handle
* the rest as usual */
qemuBlockJobEventProcess(driver, vm, disk,
QEMU_ASYNC_JOB_NONE,
VIR_DOMAIN_BLOCK_JOB_TYPE_PULL,
VIR_DOMAIN_BLOCK_JOB_CANCELED);
} else {
qemuDomainDiskPrivatePtr diskPriv = QEMU_DOMAIN_DISK_PRIVATE(disk);
qemuBlockJobUpdate(driver, vm, QEMU_ASYNC_JOB_NONE, disk);
while (diskPriv->blockjob) {
if (virDomainObjWait(vm) < 0) {
ret = -1;
goto endjob;
}
qemuBlockJobUpdate(driver, vm, QEMU_ASYNC_JOB_NONE, disk);
qemuDomainDiskPrivatePtr diskPriv = QEMU_DOMAIN_DISK_PRIVATE(disk);
qemuBlockJobUpdate(driver, vm, QEMU_ASYNC_JOB_NONE, disk);
while (diskPriv->blockjob) {
if (virDomainObjWait(vm) < 0) {
ret = -1;
goto endjob;
}
qemuBlockJobUpdate(driver, vm, QEMU_ASYNC_JOB_NONE, disk);
}
}
@ -16728,7 +16699,7 @@ qemuDomainGetBlockJobInfo(virDomainPtr dom,
goto endjob;
}
if (qemuDomainSupportsBlockJobs(vm, NULL) < 0)
if (qemuDomainSupportsBlockJobs(vm) < 0)
goto endjob;
if (!(disk = virDomainDiskByName(vm->def, path, true))) {
@ -16784,7 +16755,6 @@ qemuDomainBlockJobSetSpeed(virDomainPtr dom,
virDomainDiskDefPtr disk;
int ret = -1;
virDomainObjPtr vm;
bool modern;
const char *device;
unsigned long long speed = bandwidth;
@ -16816,7 +16786,7 @@ qemuDomainBlockJobSetSpeed(virDomainPtr dom,
goto endjob;
}
if (qemuDomainSupportsBlockJobs(vm, &modern) < 0)
if (qemuDomainSupportsBlockJobs(vm) < 0)
goto endjob;
if (!(disk = qemuDomainDiskByName(vm->def, path)))
@ -16829,7 +16799,7 @@ qemuDomainBlockJobSetSpeed(virDomainPtr dom,
ret = qemuMonitorBlockJobSetSpeed(qemuDomainGetMonitor(vm),
device,
speed,
modern);
true);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
ret = -1;