vz: fix detach disk to use new disk id

Actually using disk PrlVmDev_GetFriendlyName as id on
detaching volumes is not a problem. We can only detach
hard disks and these can not have empty friendly names.
But upcoming update device functionality for cdroms
can not use disk source as id at all as update operation
typically change this same source value. Thus we will need
to use cdrom bus and cdrom target name as cdrom id. So in attempt
to use same id scheme for all purpuses lets fix hard disk
detach function to use new id.
Signed-off-by: NNikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>

src/vz/vz_sdk.c

@@ -3335,6 +3335,47 @@ static int prlsdkAddDisk(vzDriverPtr driver,
     return ret;
 }
 
+static PRL_HANDLE
+prlsdkGetDisk(PRL_HANDLE sdkdom, virDomainDiskDefPtr disk, bool isCt)
+{
+    PRL_RESULT pret;
+    PRL_UINT32 hddCount;
+    size_t i;
+    PRL_HANDLE hdd = PRL_INVALID_HANDLE;
+    int bus;
+    char *dst = NULL;
+
+    pret = PrlVmCfg_GetHardDisksCount(sdkdom, &hddCount);
+    prlsdkCheckRetGoto(pret, error);
+
+    for (i = 0; i < hddCount; ++i) {
+        pret = PrlVmCfg_GetHardDisk(sdkdom, i, &hdd);
+        prlsdkCheckRetGoto(pret, error);
+
+        if (prlsdkGetDiskId(hdd, isCt, &bus, &dst) < 0)
+            goto error;
+
+        if (disk->bus == bus && STREQ(disk->dst, dst)) {
+            VIR_FREE(dst);
+            return hdd;
+        }
+
+        PrlHandle_Free(hdd);
+        hdd = PRL_INVALID_HANDLE;
+        VIR_FREE(dst);
+    }
+
+    virReportError(VIR_ERR_INTERNAL_ERROR,
+                   _("No disk with bus '%s' and target '%s'"),
+                   virDomainDiskBusTypeToString(disk->bus), disk->dst);
+    return PRL_INVALID_HANDLE;
+
+ error:
+    VIR_FREE(dst);
+    PrlHandle_Free(hdd);
+    return PRL_INVALID_HANDLE;
+}
+
 int
 prlsdkAttachVolume(vzDriverPtr driver,
                    virDomainObjPtr dom,
@@ -3361,70 +3402,35 @@ prlsdkAttachVolume(vzDriverPtr driver,
     return ret;
 }
 
-static int
-prlsdkGetDiskIndex(PRL_HANDLE sdkdom, virDomainDiskDefPtr disk)
-{
-    int idx = -1;
-    char *buf = NULL;
-    PRL_RESULT pret;
-    PRL_UINT32 hddCount;
-    PRL_UINT32 i;
-    PRL_HANDLE hdd = PRL_INVALID_HANDLE;
-
-    pret = PrlVmCfg_GetHardDisksCount(sdkdom, &hddCount);
-    prlsdkCheckRetGoto(pret, cleanup);
-
-    for (i = 0; i < hddCount; ++i) {
-
-        pret = PrlVmCfg_GetHardDisk(sdkdom, i, &hdd);
-        prlsdkCheckRetGoto(pret, cleanup);
-
-        if (!(buf = prlsdkGetStringParamVar(PrlVmDev_GetFriendlyName, hdd)))
-            goto cleanup;
-
-        if (STRNEQ(disk->src->path, buf)) {
-
-            PrlHandle_Free(hdd);
-            hdd = PRL_INVALID_HANDLE;
-            VIR_FREE(buf);
-            continue;
-        }
-
-        VIR_FREE(buf);
-        idx = i;
-        break;
-    }
-
- cleanup:
-    PrlHandle_Free(hdd);
-    return idx;
-}
-
 int
 prlsdkDetachVolume(virDomainObjPtr dom, virDomainDiskDefPtr disk)
 {
-    int ret = -1, idx;
+    int ret = -1;
     vzDomObjPtr privdom = dom->privateData;
     PRL_HANDLE job = PRL_INVALID_HANDLE;
+    PRL_HANDLE sdkdisk;
+    PRL_RESULT pret;
 
-    idx = prlsdkGetDiskIndex(privdom->sdkdom, disk);
-    if (idx < 0)
+    sdkdisk = prlsdkGetDisk(privdom->sdkdom, disk, IS_CT(dom->def));
+    if (sdkdisk == PRL_INVALID_HANDLE)
         goto cleanup;
 
     job = PrlVm_BeginEdit(privdom->sdkdom);
     if (PRL_FAILED(waitJob(job)))
         goto cleanup;
 
-    ret = prlsdkDelDisk(privdom->sdkdom, idx);
-    if (ret == 0) {
+    pret = PrlVmDev_Remove(sdkdisk);
+    prlsdkCheckRetGoto(pret, cleanup);
+
     job = PrlVm_CommitEx(privdom->sdkdom, PVCF_DETACH_HDD_BUNDLE);
-        if (PRL_FAILED(waitJob(job))) {
-            ret = -1;
+    if (PRL_FAILED(waitJob(job)))
         goto cleanup;
-        }
-    }
+
+    ret = 0;
 
  cleanup:
+
+    PrlHandle_Free(sdkdisk);
     return ret;
 }