On 03/29/2018 01:52 PM, Jim Fehlig wrote:
On 03/09/2018 09:48 AM, John Ferlan wrote:
For openvzDomObjFromDomainLocked and openvzDomainLookupByID let's return a locked and referenced @vm object so that callers can then use the common and more consistent virDomainObjEndAPI in order to handle cleanup rather than needing to know that the returned object is locked and calling virObjectUnlock.
The LookupByName already returns the ref counted and locked object, so this will make things more consistent.
Signed-off-by: John Ferlan <jferlan@redhat.com> --- src/openvz/openvz_driver.c | 76 ++++++++++++++++------------------------------ 1 file changed, 26 insertions(+), 50 deletions(-)
Reviewed-by: Jim Fehlig <jfehlig@suse.com>
Regards, Jim
Thanks - although based on some of the libxl adjustments and comments in/for the bhyve patch #1 - the following 3 functions need adjustment as well since there's a reffed @vm object: openvzDomainUndefineFlags - Since we have a reffed/locked object calling into virDomainObjListRemove, we need to Lock it upon return and allow the subsequent virDomainObjEndAPI handle the removal. openvzDomainMigratePrepare3Params - Original change too aggressive here as virDomainObjListAdd returns 2 refs and locked and we need to leave it that way. openvzDomainMigrateConfirm3Params - Same as openvzDomainUndefineFlags Changes I'd squash in are: diff --git a/src/openvz/openvz_driver.c b/src/openvz/openvz_driver.c index 649922e59..ec9541840 100644 --- a/src/openvz/openvz_driver.c +++ b/src/openvz/openvz_driver.c @@ -1165,7 +1165,7 @@ openvzDomainUndefineFlags(virDomainPtr dom, vm->persistent = 0; } else { virDomainObjListRemove(driver->domains, vm); - vm = NULL; + virObjectLock(vm); } ret = 0; @@ -2263,7 +2263,8 @@ openvzDomainMigratePrepare3Params(virConnectPtr dconn, done: VIR_FREE(my_hostname); virURIFree(uri); - virDomainObjEndAPI(&vm); + if (vm) + virObjectUnlock(vm); return ret; } @@ -2418,7 +2419,7 @@ openvzDomainMigrateConfirm3Params(virDomainPtr domain, VIR_DEBUG("Domain '%s' successfully migrated", vm->def->name); virDomainObjListRemove(driver->domains, vm); - vm = NULL; + virObjectLock(vm); ret = 0; John
diff --git a/src/openvz/openvz_driver.c b/src/openvz/openvz_driver.c index b31bf0714..b0b72b171 100644 --- a/src/openvz/openvz_driver.c +++ b/src/openvz/openvz_driver.c @@ -95,7 +95,7 @@ openvzDomObjFromDomainLocked(struct openvz_driver *driver, virDomainObjPtr vm; char uuidstr[VIR_UUID_STRING_BUFLEN]; - if (!(vm = virDomainObjListFindByUUID(driver->domains, uuid))) { + if (!(vm = virDomainObjListFindByUUIDRef(driver->domains, uuid))) { virUUIDFormat(uuid, uuidstr); virReportError(VIR_ERR_NO_DOMAIN, @@ -329,8 +329,7 @@ openvzDomainGetHostname(virDomainPtr dom, unsigned int flags) } cleanup: - if (vm) - virObjectUnlock(vm); + virDomainObjEndAPI(&vm); return hostname; error: @@ -347,7 +346,7 @@ static virDomainPtr openvzDomainLookupByID(virConnectPtr conn, virDomainPtr dom = NULL; openvzDriverLock(driver); - vm = virDomainObjListFindByID(driver->domains, id); + vm = virDomainObjListFindByIDRef(driver->domains, id); openvzDriverUnlock(driver); if (!vm) { @@ -359,8 +358,7 @@ static virDomainPtr openvzDomainLookupByID(virConnectPtr conn, dom = virGetDomain(conn, vm->def->name, vm->def->uuid, vm->def->id); cleanup: - if (vm) - virObjectUnlock(vm); + virDomainObjEndAPI(&vm); return dom; } @@ -391,8 +389,7 @@ static char *openvzDomainGetOSType(virDomainPtr dom) ignore_value(VIR_STRDUP(ret, virDomainOSTypeToString(vm->def->os.type))); - if (vm) - virObjectUnlock(vm); + virDomainObjEndAPI(&vm); return ret; } @@ -409,8 +406,7 @@ static virDomainPtr openvzDomainLookupByUUID(virConnectPtr conn, dom = virGetDomain(conn, vm->def->name, vm->def->uuid, vm->def->id); - if (vm) - virObjectUnlock(vm); + virDomainObjEndAPI(&vm); return dom; } @@ -469,8 +465,7 @@ static int openvzDomainGetInfo(virDomainPtr dom, ret = 0; cleanup: - if (vm) - virObjectUnlock(vm); + virDomainObjEndAPI(&vm); return ret; } @@ -492,8 +487,7 @@ openvzDomainGetState(virDomainPtr dom, ret = openvzGetVEStatus(vm, state, reason); - if (vm) - virObjectUnlock(vm); + virDomainObjEndAPI(&vm); return ret; } @@ -509,8 +503,7 @@ static int openvzDomainIsActive(virDomainPtr dom) ret = virDomainObjIsActive(obj); - if (obj) - virObjectUnlock(obj); + virDomainObjEndAPI(&obj); return ret; } @@ -526,8 +519,7 @@ static int openvzDomainIsPersistent(virDomainPtr dom) ret = obj->persistent; - if (obj) - virObjectUnlock(obj); + virDomainObjEndAPI(&obj); return ret; } @@ -549,8 +541,7 @@ static char *openvzDomainGetXMLDesc(virDomainPtr dom, unsigned int flags) { ret = virDomainDefFormat(vm->def, driver->caps, virDomainDefFormatConvertXMLFlags(flags)); - if (vm) - virObjectUnlock(vm); + virDomainObjEndAPI(&vm); return ret; } @@ -600,8 +591,7 @@ static int openvzDomainSuspend(virDomainPtr dom) ret = 0; cleanup: - if (vm) - virObjectUnlock(vm); + virDomainObjEndAPI(&vm); return ret; } @@ -631,8 +621,7 @@ static int openvzDomainResume(virDomainPtr dom) ret = 0; cleanup: - if (vm) - virObjectUnlock(vm); + virDomainObjEndAPI(&vm); return ret; } @@ -670,8 +659,7 @@ openvzDomainShutdownFlags(virDomainPtr dom, ret = 0; cleanup: - if (vm) - virObjectUnlock(vm); + virDomainObjEndAPI(&vm); return ret; } @@ -724,8 +712,7 @@ static int openvzDomainReboot(virDomainPtr dom, virDomainObjSetState(vm, VIR_DOMAIN_RUNNING, VIR_DOMAIN_RUNNING_BOOTED); cleanup: - if (vm) - virObjectUnlock(vm); + virDomainObjEndAPI(&vm); return ret; } @@ -1183,8 +1170,7 @@ openvzDomainUndefineFlags(virDomainPtr dom, ret = 0; cleanup: - if (vm) - virObjectUnlock(vm); + virDomainObjEndAPI(&vm); openvzDriverUnlock(driver); return ret; } @@ -1213,8 +1199,7 @@ openvzDomainSetAutostart(virDomainPtr dom, int autostart) ret = 0; cleanup: - if (vm) - virObjectUnlock(vm); + virDomainObjEndAPI(&vm); return ret; } @@ -1243,8 +1228,7 @@ openvzDomainGetAutostart(virDomainPtr dom, int *autostart) cleanup: VIR_FREE(value); - if (vm) - virObjectUnlock(vm); + virDomainObjEndAPI(&vm); return ret; } @@ -1336,8 +1320,7 @@ static int openvzDomainSetVcpusFlags(virDomainPtr dom, unsigned int nvcpus, ret = 0; cleanup: - if (vm) - virObjectUnlock(vm); + virDomainObjEndAPI(&vm); return ret; } @@ -1934,8 +1917,7 @@ openvzDomainInterfaceStats(virDomainPtr dom, ret = 0; cleanup: - if (vm) - virObjectUnlock(vm); + virDomainObjEndAPI(&vm); return ret; } @@ -2029,8 +2011,7 @@ openvzDomainUpdateDeviceFlags(virDomainPtr dom, const char *xml, cleanup: openvzDriverUnlock(driver); virDomainDeviceDefFree(dev); - if (vm) - virObjectUnlock(vm); + virDomainObjEndAPI(&vm); return ret; } @@ -2166,8 +2147,7 @@ openvzDomainMigrateBegin3Params(virDomainPtr domain, VIR_DOMAIN_DEF_FORMAT_SECURE); cleanup: - if (vm) - virObjectUnlock(vm); + virDomainObjEndAPI(&vm); return xml; } @@ -2269,8 +2249,7 @@ openvzDomainMigratePrepare3Params(virConnectPtr dconn, done: VIR_FREE(my_hostname); virURIFree(uri); - if (vm) - virObjectUnlock(vm); + virDomainObjEndAPI(&vm); return ret; } @@ -2323,8 +2302,7 @@ openvzDomainMigratePerform3Params(virDomainPtr domain, cleanup: virCommandFree(cmd); virURIFree(uri); - if (vm) - virObjectUnlock(vm); + virDomainObjEndAPI(&vm); return ret; } @@ -2431,8 +2409,7 @@ openvzDomainMigrateConfirm3Params(virDomainPtr domain, ret = 0; cleanup: - if (vm) - virObjectUnlock(vm); + virDomainObjEndAPI(&vm); return ret; } @@ -2450,8 +2427,7 @@ openvzDomainHasManagedSaveImage(virDomainPtr dom, unsigned int flags) ret = 0; - if (obj) - virObjectUnlock(obj); + virDomainObjEndAPI(&obj); return ret; }