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xen_common: Change xenParsePCIList to use virConfGetValueStringList

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The `if(!list || list->type != VIR_CONF_LIST)` check couldn't be
written in a 100% similar way. Instead, we're just checking whether
`virConfGetValueStringList() <= 0` and creating a new function to:
- return -1 in case virConfGetValueStringList fails either due to some
  allocation failure or when traversing the list;
- resetting the last error and return 0 otherwise;

Taking this approach we can have the behaviour with the new code as
close as possible to the old one.

Signed-off-by: Fabiano Fidêncio <fidencio@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
This commit is contained in:
Fabiano Fidêncio 2018-09-20 15:28:50 +02:00 committed by John Ferlan
parent b98d936c19
commit 5f0c1c1e25
1 changed files with 28 additions and 8 deletions
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36
src/xenconfig/xen_common.c
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@ -454,21 +454,41 @@ xenParsePCI(char *entry)
}
static int
xenHandleConfGetValueStringListErrors(int ret)
{
if (ret < 0) {
/* It means virConfGetValueStringList() didn't fail because the
* cval->type switch fell through - since we're passing
* @compatString == false - assumes failures for memory allocation
* and VIR_CONF_LIST traversal failure should cause -1 to be
* returned to the caller with the error message set. */
if (virGetLastErrorCode() != VIR_ERR_INTERNAL_ERROR)
return -1;
/* If we did fall through the switch, then ignore and clear the
* last error. */
virResetLastError();
}
return 0;
}
static int
xenParsePCIList(virConfPtr conf, virDomainDefPtr def)
{
virConfValuePtr list = virConfGetValue(conf, "pci");
VIR_AUTOPTR(virString) pcis = NULL;
virString *entries = NULL;
int rc;
if (!list || list->type != VIR_CONF_LIST)
return 0;
if ((rc = virConfGetValueStringList(conf, "pci", false, &pcis)) <= 0)
return xenHandleConfGetValueStringListErrors(rc);
for (list = list->list; list; list = list->next) {
for (entries = pcis; *entries; entries++) {
virString entry = *entries;
virDomainHostdevDefPtr hostdev;
if ((list->type != VIR_CONF_STRING) || (list->str == NULL))
continue;
if (!(hostdev = xenParsePCI(list->str)))
if (!(hostdev = xenParsePCI(entry)))
return -1;
if (VIR_APPEND_ELEMENT(def->hostdevs, def->nhostdevs, hostdev) < 0) {