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conf: Store cpu count as unsigned int

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While we probably won't see machines with more than 65536 cpus for a
while lets store the cpu count as an integer so that we can avoid quite
a lot of overflow checks in our code.
This commit is contained in:
Peter Krempa 2015-05-25 15:43:29 +02:00
parent d3889db071
commit fbbea79890
4 changed files with 20 additions and 54 deletions
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50
src/conf/domain_conf.c
View File

@ -13893,7 +13893,6 @@ virDomainDefParseXML(xmlDocPtr xml,
int n;
long id = -1;
virDomainDefPtr def;
unsigned long count;
bool uuid_generated = false;
virHashTablePtr bootHash = NULL;
bool usb_none = false;
@ -14176,44 +14175,31 @@ virDomainDefParseXML(xmlDocPtr xml,
&def->mem.swap_hard_limit) < 0)
goto error;
n = virXPathULong("string(./vcpu[1])", ctxt, &count);
if (n == -2) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("maximum vcpus must be an integer"));
goto error;
} else if (n < 0) {
def->maxvcpus = 1;
} else {
def->maxvcpus = count;
if (count == 0 || (unsigned short) count != count) {
virReportError(VIR_ERR_XML_ERROR,
_("invalid maximum number of vCPUs '%lu'"), count);
if ((n = virXPathUInt("string(./vcpu[1])", ctxt, &def->maxvcpus)) < 0) {
if (n == -2) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("maximum vcpus count must be an integer"));
goto error;
}
def->maxvcpus = 1;
}
n = virXPathULong("string(./vcpu[1]/@current)", ctxt, &count);
if (n == -2) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("current vcpus must be an integer"));
goto error;
} else if (n < 0) {
def->vcpus = def->maxvcpus;
} else {
def->vcpus = count;
if (count == 0 || (unsigned short) count != count) {
virReportError(VIR_ERR_XML_ERROR,
_("invalid current number of vCPUs '%lu'"), count);
if ((n = virXPathUInt("string(./vcpu[1]/@current)", ctxt, &def->vcpus)) < 0) {
if (n == -2) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("current vcpus count must be an integer"));
goto error;
}
if (def->maxvcpus < count) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("maxvcpus must not be less than current vcpus "
"(%d < %lu)"),
def->maxvcpus, count);
goto error;
}
def->vcpus = def->maxvcpus;
}
if (def->maxvcpus < def->vcpus) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("maxvcpus must not be less than current vcpus "
"(%u < %u)"), def->maxvcpus, def->vcpus);
goto error;
}
tmp = virXPathString("string(./vcpu[1]/@placement)", ctxt);

4
src/conf/domain_conf.h
View File

@ -2159,8 +2159,8 @@ struct _virDomainDef {
virDomainBlkiotune blkio;
virDomainMemtune mem;
unsigned short vcpus;
unsigned short maxvcpus;
unsigned int vcpus;
unsigned int maxvcpus;
int placement_mode;
virBitmapPtr cpumask;

14
src/libvirt-domain.c
View File

@ -7279,10 +7279,6 @@ virDomainSetVcpusFlags(virDomainPtr domain, unsigned int nvcpus,
virCheckNonZeroArgGoto(nvcpus, error);
if ((unsigned short) nvcpus != nvcpus) {
virReportError(VIR_ERR_OVERFLOW, _("input too large: %u"), nvcpus);
goto error;
}
conn = domain->conn;
if (conn->driver->domainSetVcpusFlags) {
@ -7403,11 +7399,6 @@ virDomainPinVcpu(virDomainPtr domain, unsigned int vcpu,
virCheckNonNullArgGoto(cpumap, error);
virCheckPositiveArgGoto(maplen, error);
if ((unsigned short) vcpu != vcpu) {
virReportError(VIR_ERR_OVERFLOW, _("input too large: %u"), vcpu);
goto error;
}
if (conn->driver->domainPinVcpu) {
int ret;
ret = conn->driver->domainPinVcpu(domain, vcpu, cpumap, maplen);
@ -7475,11 +7466,6 @@ virDomainPinVcpuFlags(virDomainPtr domain, unsigned int vcpu,
virCheckNonNullArgGoto(cpumap, error);
virCheckPositiveArgGoto(maplen, error);
if ((unsigned short) vcpu != vcpu) {
virReportError(VIR_ERR_OVERFLOW, _("input too large: %u"), vcpu);
goto error;
}
if (conn->driver->domainPinVcpuFlags) {
int ret;
ret = conn->driver->domainPinVcpuFlags(domain, vcpu, cpumap, maplen, flags);

6
src/qemu/qemu_driver.c
View File

@ -4870,12 +4870,6 @@ qemuDomainSetVcpusFlags(virDomainPtr dom, unsigned int nvcpus,
VIR_DOMAIN_VCPU_MAXIMUM |
VIR_DOMAIN_VCPU_GUEST, -1);
if (!nvcpus || (unsigned short) nvcpus != nvcpus) {
virReportError(VIR_ERR_INVALID_ARG,
_("argument out of range: %d"), nvcpus);
return -1;
}
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;