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qemu: separate virQEMUCapsInitCached out of virQEMUCapsNewForBinaryInternal

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Preparation for switching to virFileCache where there are two callbacks,
one to get a new data and second one to load a cached data.

This also removes virQEMUCapsReset which is no longer required.

Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
This commit is contained in:
Pavel Hrdina 2017-07-18 16:14:07 +02:00
parent 56a047a67e
commit 7fb4c471d1
3 changed files with 66 additions and 86 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

149
src/qemu/qemu_capabilities.c
View File

@ -4250,37 +4250,6 @@ virQEMUCapsRememberCached(virQEMUCapsPtr qemuCaps, const char *cacheDir)
}
static void
virQEMUCapsReset(virQEMUCapsPtr qemuCaps)
{
size_t i;
virBitmapClearAll(qemuCaps->flags);
qemuCaps->version = qemuCaps->kvmVersion = 0;
VIR_FREE(qemuCaps->package);
qemuCaps->arch = VIR_ARCH_NONE;
qemuCaps->usedQMP = false;
virObjectUnref(qemuCaps->kvmCPUModels);
qemuCaps->kvmCPUModels = NULL;
virObjectUnref(qemuCaps->tcgCPUModels);
qemuCaps->tcgCPUModels = NULL;
for (i = 0; i < qemuCaps->nmachineTypes; i++) {
VIR_FREE(qemuCaps->machineTypes[i].name);
VIR_FREE(qemuCaps->machineTypes[i].alias);
}
VIR_FREE(qemuCaps->machineTypes);
qemuCaps->nmachineTypes = 0;
VIR_FREE(qemuCaps->gicCapabilities);
qemuCaps->ngicCapabilities = 0;
virQEMUCapsHostCPUDataClear(&qemuCaps->kvmCPU);
virQEMUCapsHostCPUDataClear(&qemuCaps->tcgCPU);
}
static bool
virQEMUCapsIsValid(virQEMUCapsPtr qemuCaps,
uid_t runUid,
@ -4346,7 +4315,8 @@ virQEMUCapsIsValid(virQEMUCapsPtr qemuCaps,
static int
virQEMUCapsInitCached(virCapsPtr caps,
virQEMUCapsPtr qemuCaps,
virQEMUCapsPtr *qemuCaps,
const char *binary,
const char *cacheDir,
uid_t runUid,
gid_t runGid)
@ -4356,14 +4326,12 @@ virQEMUCapsInitCached(virCapsPtr caps,
int ret = -1;
char *binaryhash = NULL;
struct stat sb;
time_t qemuctime = qemuCaps->ctime;
virQEMUCapsPtr qemuCapsNew = NULL;
if (virAsprintf(&capsdir, "%s/capabilities", cacheDir) < 0)
goto cleanup;
if (virCryptoHashString(VIR_CRYPTO_HASH_SHA256,
qemuCaps->binary,
&binaryhash) < 0)
if (virCryptoHashString(VIR_CRYPTO_HASH_SHA256, binary, &binaryhash) < 0)
goto cleanup;
if (virAsprintf(&capsfile, "%s/%s.xml", capsdir, binaryhash) < 0)
@ -4379,33 +4347,39 @@ virQEMUCapsInitCached(virCapsPtr caps,
if (stat(capsfile, &sb) < 0) {
if (errno == ENOENT) {
VIR_DEBUG("No cached capabilities '%s' for '%s'",
capsfile, qemuCaps->binary);
capsfile, binary);
ret = 0;
goto cleanup;
}
virReportSystemError(errno,
_("Unable to access cache '%s' for '%s'"),
capsfile, qemuCaps->binary);
capsfile, binary);
goto cleanup;
}
if (virQEMUCapsLoadCache(caps, qemuCaps, capsfile) < 0) {
if (!(qemuCapsNew = virQEMUCapsNew()))
goto cleanup;
if (VIR_STRDUP(qemuCapsNew->binary, binary) < 0)
goto discard;
if (virQEMUCapsLoadCache(caps, qemuCapsNew, capsfile) < 0) {
VIR_WARN("Failed to load cached caps from '%s' for '%s': %s",
capsfile, qemuCaps->binary, virGetLastErrorMessage());
capsfile, qemuCapsNew->binary, virGetLastErrorMessage());
virResetLastError();
goto discard;
}
if (!virQEMUCapsIsValid(qemuCaps, runUid, runGid))
if (!virQEMUCapsIsValid(qemuCapsNew, runUid, runGid))
goto discard;
VIR_DEBUG("Loaded '%s' for '%s' ctime %lld usedQMP=%d",
capsfile, qemuCaps->binary,
(long long)qemuCaps->ctime, qemuCaps->usedQMP);
capsfile, qemuCapsNew->binary,
(long long)qemuCapsNew->ctime, qemuCapsNew->usedQMP);
ret = 1;
*qemuCaps = qemuCapsNew;
cleanup:
qemuCaps->ctime = qemuctime;
VIR_FREE(binaryhash);
VIR_FREE(capsfile);
VIR_FREE(capsdir);
@ -4413,9 +4387,9 @@ virQEMUCapsInitCached(virCapsPtr caps,
discard:
VIR_DEBUG("Dropping cached capabilities '%s' for '%s'",
capsfile, qemuCaps->binary);
capsfile, qemuCapsNew->binary);
ignore_value(unlink(capsfile));
virQEMUCapsReset(qemuCaps);
virObjectUnref(qemuCapsNew);
ret = 0;
goto cleanup;
}
@ -5230,14 +5204,12 @@ virQEMUCapsPtr
virQEMUCapsNewForBinaryInternal(virCapsPtr caps,
const char *binary,
const char *libDir,
const char *cacheDir,
uid_t runUid,
gid_t runGid,
bool qmpOnly)
{
virQEMUCapsPtr qemuCaps;
struct stat sb;
int rv;
char *qmperr = NULL;
if (!(qemuCaps = virQEMUCapsNew()))
@ -5265,43 +5237,31 @@ virQEMUCapsNewForBinaryInternal(virCapsPtr caps,
goto error;
}
if (!cacheDir)
rv = 0;
else if ((rv = virQEMUCapsInitCached(caps, qemuCaps, cacheDir,
runUid, runGid)) < 0)
if (virQEMUCapsInitQMP(qemuCaps, libDir, runUid, runGid, &qmperr) < 0) {
virQEMUCapsLogProbeFailure(binary);
goto error;
if (rv == 0) {
if (virQEMUCapsInitQMP(qemuCaps, libDir, runUid, runGid, &qmperr) < 0) {
virQEMUCapsLogProbeFailure(binary);
goto error;
}
if (qmpOnly && !qemuCaps->usedQMP) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Failed to probe QEMU binary with QMP: %s"),
qmperr ? qmperr : _("unknown error"));
virQEMUCapsLogProbeFailure(binary);
goto error;
}
if (!qemuCaps->usedQMP &&
virQEMUCapsInitHelp(qemuCaps, runUid, runGid, qmperr) < 0) {
virQEMUCapsLogProbeFailure(binary);
goto error;
}
qemuCaps->libvirtCtime = virGetSelfLastChanged();
qemuCaps->libvirtVersion = LIBVIR_VERSION_NUMBER;
if (cacheDir &&
virQEMUCapsRememberCached(qemuCaps, cacheDir) < 0)
goto error;
virQEMUCapsInitHostCPUModel(qemuCaps, caps, VIR_DOMAIN_VIRT_KVM);
virQEMUCapsInitHostCPUModel(qemuCaps, caps, VIR_DOMAIN_VIRT_QEMU);
}
if (qmpOnly && !qemuCaps->usedQMP) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Failed to probe QEMU binary with QMP: %s"),
qmperr ? qmperr : _("unknown error"));
virQEMUCapsLogProbeFailure(binary);
goto error;
}
if (!qemuCaps->usedQMP &&
virQEMUCapsInitHelp(qemuCaps, runUid, runGid, qmperr) < 0) {
virQEMUCapsLogProbeFailure(binary);
goto error;
}
qemuCaps->libvirtCtime = virGetSelfLastChanged();
qemuCaps->libvirtVersion = LIBVIR_VERSION_NUMBER;
virQEMUCapsInitHostCPUModel(qemuCaps, caps, VIR_DOMAIN_VIRT_KVM);
virQEMUCapsInitHostCPUModel(qemuCaps, caps, VIR_DOMAIN_VIRT_QEMU);
cleanup:
VIR_FREE(qmperr);
return qemuCaps;
@ -5320,8 +5280,29 @@ virQEMUCapsNewForBinary(virCapsPtr caps,
uid_t runUid,
gid_t runGid)
{
return virQEMUCapsNewForBinaryInternal(caps, binary, libDir, cacheDir,
runUid, runGid, false);
int rv;
virQEMUCapsPtr qemuCaps = NULL;
if ((rv = virQEMUCapsInitCached(caps, &qemuCaps, binary, cacheDir,
runUid, runGid)) < 0)
goto error;
if (rv == 0) {
if (!(qemuCaps = virQEMUCapsNewForBinaryInternal(caps, binary,
libDir, runUid,
runGid, false))) {
goto error;
}
if (virQEMUCapsRememberCached(qemuCaps, cacheDir) < 0)
goto error;
}
return qemuCaps;
error:
virObjectUnref(qemuCaps);
return NULL;
}

1
src/qemu/qemu_capspriv.h
View File

@ -43,7 +43,6 @@ virQEMUCapsPtr
virQEMUCapsNewForBinaryInternal(virCapsPtr caps,
const char *binary,
const char *libDir,
const char *cacheDir,
uid_t runUid,
gid_t runGid,
bool qmpOnly);

2
tests/qemucapsprobe.c
View File

@ -70,7 +70,7 @@ main(int argc, char **argv)
if (virThreadCreate(&thread, false, eventLoop, NULL) < 0)
return EXIT_FAILURE;
if (!(caps = virQEMUCapsNewForBinaryInternal(NULL, argv[1], "/tmp", NULL,
if (!(caps = virQEMUCapsNewForBinaryInternal(NULL, argv[1], "/tmp",
-1, -1, true)))
return EXIT_FAILURE;