qemu: Don't store disk alias in qemuAgentDiskInfo

The qemuAgentDiskInfo structure is filled with information received from
the agent command response, except for the 'alias' field, which is
retrieved from the vm definition. Limit this structure only to data that
was received from the agent message.

This is another intermediate step in moving the responsibility for
searching the vmdef from qemu_agent.c to qemu_driver.c so that we can
avoid holding an agent job and a normal job at the same time.
Signed-off-by: NJonathon Jongsma <jjongsma@redhat.com>
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NMichal Privoznik <mprivozn@redhat.com>

src/qemu/qemu_agent.c

@@ -1851,7 +1851,6 @@ qemuAgentSetTime(qemuAgentPtr mon,
 typedef struct _qemuAgentDiskInfo qemuAgentDiskInfo;
 typedef qemuAgentDiskInfo *qemuAgentDiskInfoPtr;
 struct _qemuAgentDiskInfo {
-    char *alias;
     char *serial;
     virPCIDeviceAddress pci_controller;
     char *bus_type;
@@ -1880,7 +1879,6 @@ qemuAgentDiskInfoFree(qemuAgentDiskInfoPtr info)
         return;
 
     VIR_FREE(info->serial);
-    VIR_FREE(info->alias);
     VIR_FREE(info->bus_type);
     VIR_FREE(info->devnode);
     VIR_FREE(info);
@@ -1906,7 +1904,8 @@ qemuAgentFSInfoFree(qemuAgentFSInfoPtr info)
 }
 
 static virDomainFSInfoPtr
-qemuAgentFSInfoToPublic(qemuAgentFSInfoPtr agent)
+qemuAgentFSInfoToPublic(qemuAgentFSInfoPtr agent,
+                        virDomainDefPtr vmdef)
 {
     virDomainFSInfoPtr ret = NULL;
     size_t i;
@@ -1924,8 +1923,19 @@ qemuAgentFSInfoToPublic(qemuAgentFSInfoPtr agent)
 
     ret->ndevAlias = agent->ndisks;
 
-    for (i = 0; i < ret->ndevAlias; i++)
-        ret->devAlias[i] = g_strdup(agent->disks[i]->alias);
+    for (i = 0; i < ret->ndevAlias; i++) {
+        qemuAgentDiskInfoPtr agentdisk = agent->disks[i];
+        virDomainDiskDefPtr diskDef;
+
+        if (!(diskDef = virDomainDiskByAddress(vmdef,
+                                               &agentdisk->pci_controller,
+                                               agentdisk->bus,
+                                               agentdisk->target,
+                                               agentdisk->unit)))
+            continue;
+
+        ret->devAlias[i] = g_strdup(diskDef->dst);
+    }
 
     return ret;
 
@@ -1936,8 +1946,7 @@ qemuAgentFSInfoToPublic(qemuAgentFSInfoPtr agent)
 
 static int
 qemuAgentGetFSInfoFillDisks(virJSONValuePtr jsondisks,
-                            qemuAgentFSInfoPtr fsinfo,
-                            virDomainDefPtr vmdef)
+                            qemuAgentFSInfoPtr fsinfo)
 {
     size_t ndisks;
     size_t i;
@@ -1960,7 +1969,6 @@ qemuAgentGetFSInfoFillDisks(virJSONValuePtr jsondisks,
         virJSONValuePtr jsondisk = virJSONValueArrayGet(jsondisks, i);
         virJSONValuePtr pci;
         qemuAgentDiskInfoPtr disk;
-        virDomainDiskDefPtr diskDef;
         const char *val;
 
         if (!jsondisk) {
@@ -2011,14 +2019,6 @@ qemuAgentGetFSInfoFillDisks(virJSONValuePtr jsondisks,
         GET_DISK_ADDR(pci, &disk->pci_controller.function, "function");
 
 #undef GET_DISK_ADDR
-        if (!(diskDef = virDomainDiskByAddress(vmdef,
-                                               &disk->pci_controller,
-                                               disk->bus,
-                                               disk->target,
-                                               disk->unit)))
-            continue;
-
-        disk->alias = g_strdup(diskDef->dst);
     }
 
     return 0;
@@ -2030,8 +2030,7 @@ qemuAgentGetFSInfoFillDisks(virJSONValuePtr jsondisks,
  */
 static int
 qemuAgentGetFSInfoInternal(qemuAgentPtr mon,
-                           qemuAgentFSInfoPtr **info,
-                           virDomainDefPtr vmdef)
+                           qemuAgentFSInfoPtr **info)
 {
     size_t i;
     int ret = -1;
@@ -2147,7 +2146,7 @@ qemuAgentGetFSInfoInternal(qemuAgentPtr mon,
             goto cleanup;
         }
 
-        if (qemuAgentGetFSInfoFillDisks(disk, info_ret[i], vmdef) < 0)
+        if (qemuAgentGetFSInfoFillDisks(disk, info_ret[i]) < 0)
             goto cleanup;
     }
 
@@ -2177,14 +2176,14 @@ qemuAgentGetFSInfo(qemuAgentPtr mon,
     size_t i;
     int nfs;
 
-    nfs = qemuAgentGetFSInfoInternal(mon, &agentinfo, vmdef);
+    nfs = qemuAgentGetFSInfoInternal(mon, &agentinfo);
     if (nfs < 0)
         return ret;
     if (VIR_ALLOC_N(info_ret, nfs) < 0)
         goto cleanup;
 
     for (i = 0; i < nfs; i++) {
-        if (!(info_ret[i] = qemuAgentFSInfoToPublic(agentinfo[i])))
+        if (!(info_ret[i] = qemuAgentFSInfoToPublic(agentinfo[i], vmdef)))
             goto cleanup;
     }
 
@@ -2219,7 +2218,7 @@ qemuAgentGetFSInfoParams(qemuAgentPtr mon,
     size_t i, j;
     int nfs;
 
-    if ((nfs = qemuAgentGetFSInfoInternal(mon, &fsinfo, vmdef)) < 0)
+    if ((nfs = qemuAgentGetFSInfoInternal(mon, &fsinfo)) < 0)
         return nfs;
 
     if (virTypedParamsAddUInt(params, nparams, maxparams,
@@ -2266,13 +2265,22 @@ qemuAgentGetFSInfoParams(qemuAgentPtr mon,
                                   param_name, fsinfo[i]->ndisks) < 0)
             goto cleanup;
         for (j = 0; j < fsinfo[i]->ndisks; j++) {
+            virDomainDiskDefPtr diskdef = NULL;
             qemuAgentDiskInfoPtr d = fsinfo[i]->disks[j];
-            g_snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
-                       "fs.%zu.disk.%zu.alias", i, j);
-            if (d->alias &&
-                virTypedParamsAddString(params, nparams, maxparams,
-                                        param_name, d->alias) < 0)
-                goto cleanup;
+            /* match the disk to the target in the vm definition */
+            diskdef = virDomainDiskByAddress(vmdef,
+                                             &d->pci_controller,
+                                             d->bus,
+                                             d->target,
+                                             d->unit);
+            if (diskdef) {
+                g_snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
+                           "fs.%zu.disk.%zu.alias", i, j);
+                if (diskdef->dst &&
+                    virTypedParamsAddString(params, nparams, maxparams,
+                                            param_name, diskdef->dst) < 0)
+                    goto cleanup;
+            }
 
             g_snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
                        "fs.%zu.disk.%zu.serial", i, j);