Re: [libvirt] [libvirt PATCH v7 4/6] xen_common: Change xenParsePCIList to using virConfGetValueStringList

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(a)redhat.com&gt; --- src/xenconfig/xen_common.c | 34 ++++++++++++++++++++++++++-------- 1 file changed, 26 insertions(+), 8 deletions(-) diff --git a/src/xenconfig/xen_common.c b/src/xenconfig/xen_common.c index 7b3e5c3b44..9133998cd7 100644 --- a/src/xenconfig/xen_common.c +++ b/src/xenconfig/xen_common.c @@ -458,22 +458,40 @@ xenParsePCI(char *entry) return hostdev; }

+static int +xenHandleConfGetValueStringListErrors(int ret, int errorCode) +{ + 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 (errorCode != 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, virGetLastErrorCode());