[libvirt] [PATCH] qemu: Exit on first error in qemuDomainGetMemoryParameters

There is no point in trying to fill params beyond the first error, because when qemuDomainGetMemoryParameters returns -1 then the caller cannot detect which values in params are valid. --- There is a similar pattern in qemuDomainSetMemoryParameters that tries to apply all given params even if one already failed. From a user's POV it's probably better to apply all params without an error or to apply non at all when one fails. But this is harder to implemeneted and requires a rollback mechanism. src/qemu/qemu_driver.c | 21 ++++++++------------- 1 files changed, 8 insertions(+), 13 deletions(-) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index 6395c93..ae1d833 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -9676,7 +9676,6 @@ static int qemuDomainGetMemoryParameters(virDomainPtr dom, goto cleanup; } - ret = 0; for (i = 0; i < *nparams; i++) { virMemoryParameterPtr param = &params[i]; val = 0; @@ -9689,14 +9688,12 @@ static int qemuDomainGetMemoryParameters(virDomainPtr dom, if (rc != 0) { virReportSystemError(-rc, "%s", _("unable to get memory hard limit")); - ret = -1; - continue; + goto cleanup; } if (virStrcpyStatic(param->field, VIR_DOMAIN_MEMORY_HARD_LIMIT) == NULL) { qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("Field memory hard limit too long for destination")); - ret = -1; - continue; + goto cleanup; } param->value.ul = val; break; @@ -9706,14 +9703,12 @@ static int qemuDomainGetMemoryParameters(virDomainPtr dom, if (rc != 0) { virReportSystemError(-rc, "%s", _("unable to get memory soft limit")); - ret = -1; - continue; + goto cleanup; } if (virStrcpyStatic(param->field, VIR_DOMAIN_MEMORY_SOFT_LIMIT) == NULL) { qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("Field memory soft limit too long for destination")); - ret = -1; - continue; + goto cleanup; } param->value.ul = val; break; @@ -9723,14 +9718,12 @@ static int qemuDomainGetMemoryParameters(virDomainPtr dom, if (rc != 0) { virReportSystemError(-rc, "%s", _("unable to get swap hard limit")); - ret = -1; - continue; + goto cleanup; } if (virStrcpyStatic(param->field, VIR_DOMAIN_MEMORY_SWAP_HARD_LIMIT) == NULL) { qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("Field swap hard limit too long for destination")); - ret = -1; - continue; + goto cleanup; } param->value.ul = val; break; @@ -9741,6 +9734,8 @@ static int qemuDomainGetMemoryParameters(virDomainPtr dom, } } + ret = 0; + cleanup: if (group) virCgroupFree(&group); -- 1.7.0.4