[libvirt] [PATCH] qemu: Check duplicate WWNs also for hotplugged disks

In commit 714b38cb232bcbbd7487af4c058fa6d0999b3326 I tried to avoid having two disks with the same WWN in a VM. I forgot to check the hotplug paths though which make it possible bypass that check. Reinforce the fix by checking the wwn when attaching the disk. Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1208009 --- src/conf/domain_conf.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index 1f7862b..5a9a88d 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -22135,6 +22135,34 @@ virDomainDeviceInfoCheckBootIndex(virDomainDefPtr def ATTRIBUTE_UNUSED, return 0; } + +/** + * virDomainDefGetDiskByWWN: + * @def: domain definition + * @wwn: wwn of a disk to find + * + * Returns a disk definition pointer corresponding to the given WWN identifier + * or NULL either if @wwn was NULL or if disk with given WWN is not present in + * the domain definition. + */ +static virDomainDiskDefPtr +virDomainDefGetDiskByWWN(virDomainDefPtr def, + const char *wwn) +{ + size_t i; + + if (!wwn) + return NULL; + + for (i = 0; i < def->ndisks; i++) { + if (STREQ_NULLABLE(def->disks[i]->wwn, wwn)) + return def->disks[i]; + } + + return NULL; +} + + int virDomainDefCompatibleDevice(virDomainDefPtr def, virDomainDeviceDefPtr dev, @@ -22178,6 +22206,15 @@ virDomainDefCompatibleDevice(virDomainDefPtr def, } } + if (dev->type == VIR_DOMAIN_DEVICE_DISK) { + if (!!virDomainDefGetDiskByWWN(def, dev->data.disk->wwn)) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("Domain already has a disk with wwn '%s'"), + dev->data.disk->wwn); + return -1; + } + } + return 0; } -- 2.4.5