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qemu: driver: Separate bulk stats worker for block devices

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Extract the fallback path that reloads the stats from disk into a
separate function.
This commit is contained in:
Peter Krempa 2016-05-18 14:40:10 +02:00
parent 5d2b0e6f12
commit 3aa5d51a95
1 changed files with 37 additions and 21 deletions
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58
src/qemu/qemu_driver.c
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@ -19310,6 +19310,40 @@ do { \
goto cleanup; \
} while (0)
/* refresh information by opening images on the disk */
static int
qemuDomainGetStatsOneBlockFallback(virQEMUDriverPtr driver,
virQEMUDriverConfigPtr cfg,
virDomainObjPtr dom,
virDomainStatsRecordPtr record,
int *maxparams,
virStorageSourcePtr src,
size_t block_idx)
{
int ret = -1;
if (virStorageSourceIsEmpty(src))
return 0;
if (qemuStorageLimitsRefresh(driver, cfg, dom, src) < 0) {
virResetLastError();
return 0;
}
if (src->allocation)
QEMU_ADD_BLOCK_PARAM_ULL(record, maxparams, block_idx,
"allocation", src->allocation);
if (src->capacity)
QEMU_ADD_BLOCK_PARAM_ULL(record, maxparams, block_idx,
"capacity", src->capacity);
if (src->physical)
QEMU_ADD_BLOCK_PARAM_ULL(record, maxparams, block_idx,
"physical", src->physical);
ret = 0;
cleanup:
return ret;
}
static int
qemuDomainGetStatsOneBlock(virQEMUDriverPtr driver,
@ -19339,28 +19373,10 @@ qemuDomainGetStatsOneBlock(virQEMUDriverPtr driver,
QEMU_ADD_BLOCK_PARAM_UI(record, maxparams, block_idx, "backingIndex",
backing_idx);
/* use fallback path if data is not available */
if (!stats || !alias || !(entry = virHashLookup(stats, alias))) {
if (virStorageSourceIsEmpty(src)) {
ret = 0;
goto cleanup;
}
if (qemuStorageLimitsRefresh(driver, cfg, dom, src) < 0) {
virResetLastError();
ret = 0;
goto cleanup;
}
if (src->allocation)
QEMU_ADD_BLOCK_PARAM_ULL(record, maxparams, block_idx,
"allocation", src->allocation);
if (src->capacity)
QEMU_ADD_BLOCK_PARAM_ULL(record, maxparams, block_idx,
"capacity", src->capacity);
if (src->physical)
QEMU_ADD_BLOCK_PARAM_ULL(record, maxparams, block_idx,
"physical", src->physical);
ret = 0;
ret = qemuDomainGetStatsOneBlockFallback(driver, cfg, dom, record,
maxparams, src, block_idx);
goto cleanup;
}