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libxl: fix dubious cpumask handling in libxlDomainSetVcpuAffinities

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Rather than casting the virBitmap pointer to uint8_t* and then using
the structure contents as a byte array, use the virBitmap API to determine
the bitmap size and test each bit.

Signed-off-by: Jeremy Fitzhardinge <jeremy@goop.org>
This commit is contained in:
Jeremy Fitzhardinge 2013-10-30 10:38:08 -07:00 committed by Jim Fehlig
parent 835f992a68
commit ba1bf10063
1 changed files with 6 additions and 4 deletions
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10
src/libxl/libxl_driver.c
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@ -448,7 +448,7 @@ libxlDomainSetVcpuAffinities(libxlDriverPrivatePtr driver, virDomainObjPtr vm)
libxlDomainObjPrivatePtr priv = vm->privateData;
virDomainDefPtr def = vm->def;
libxl_bitmap map;
uint8_t *cpumask = NULL;
virBitmapPtr cpumask = NULL;
uint8_t *cpumap = NULL;
virNodeInfo nodeinfo;
size_t cpumaplen;
@ -468,10 +468,12 @@ libxlDomainSetVcpuAffinities(libxlDriverPrivatePtr driver, virDomainObjPtr vm)
if (VIR_ALLOC_N(cpumap, cpumaplen) < 0)
goto cleanup;
cpumask = (uint8_t*) def->cputune.vcpupin[vcpu]->cpumask;
cpumask = def->cputune.vcpupin[vcpu]->cpumask;
for (i = 0; i < VIR_DOMAIN_CPUMASK_LEN; ++i) {
if (cpumask[i])
for (i = 0; i < virBitmapSize(cpumask); ++i) {
bool bit;
ignore_value(virBitmapGetBit(cpumask, i, &bit));
if (bit)
VIR_USE_CPU(cpumap, i);
}