[PATCH] rbd: Return VIR_STORAGE_FILE_RAW as format for RBD volumes

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This used to return 'unkown' and that was not correct.

A vol-dumpxml now returns:

<volume type='network'>
  <name>image3</name>
  <key>libvirt/image3</key>
  <source>
  </source>
  <capacity unit='bytes'>10737418240</capacity>
  <allocation unit='bytes'>10737418240</allocation>
  <target>
    <path>libvirt/image3</path>
    <format type='raw'/>
  </target>
</volume>

The RBD driver will now error out if a different format than RAW
is provided when creating a volume.

Signed-off-by: Wido den Hollander <wido@xxxxxxxxx>
---
 src/conf/storage_conf.c           |  3 ++-
 src/storage/storage_backend_rbd.c | 13 +++++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/src/conf/storage_conf.c b/src/conf/storage_conf.c
index 9b8abea..7c81bab 100644
--- a/src/conf/storage_conf.c
+++ b/src/conf/storage_conf.c
@@ -220,7 +220,8 @@ static virStoragePoolTypeInfo poolTypeInfo[] = {
       },
       .volOptions = {
           .defaultFormat = VIR_STORAGE_FILE_RAW,
-          .formatToString = virStoragePoolFormatDiskTypeToString,
+          .formatFromString = virStorageVolumeFormatFromString,
+          .formatToString = virStorageFileFormatTypeToString,
       }
     },
     {.poolType = VIR_STORAGE_POOL_SHEEPDOG,
diff --git a/src/storage/storage_backend_rbd.c b/src/storage/storage_backend_rbd.c
index cdbfdee..80684eb 100644
--- a/src/storage/storage_backend_rbd.c
+++ b/src/storage/storage_backend_rbd.c
@@ -306,6 +306,7 @@ static int volStorageBackendRBDRefreshVolInfo(virStorageVolDefPtr vol,
     vol->target.capacity = info.size;
     vol->target.allocation = info.obj_size * info.num_objs;
     vol->type = VIR_STORAGE_VOL_NETWORK;
+    vol->target.format = VIR_STORAGE_FILE_RAW;
 
     VIR_FREE(vol->target.path);
     if (virAsprintf(&vol->target.path, "%s/%s",
@@ -557,6 +558,12 @@ virStorageBackendRBDCreateVol(virConnectPtr conn ATTRIBUTE_UNUSED,
 {
     vol->type = VIR_STORAGE_VOL_NETWORK;
 
+    if (vol->target.format != VIR_STORAGE_FILE_RAW) {
+        virReportError(VIR_ERR_NO_SUPPORT, "%s",
+                       _("only RAW volumes are supported by this storage pool"));
+        return -VIR_ERR_NO_SUPPORT;
+    }
+
     VIR_FREE(vol->target.path);
     if (virAsprintf(&vol->target.path, "%s/%s",
                     pool->def->source.name,
@@ -603,6 +610,12 @@ virStorageBackendRBDBuildVol(virConnectPtr conn,
         goto cleanup;
     }
 
+    if (vol->target.format != VIR_STORAGE_FILE_RAW) {
+        virReportError(VIR_ERR_NO_SUPPORT, "%s",
+                       _("only RAW volumes are supported by this storage pool"));
+        goto cleanup;
+    }
+
     if (virStorageBackendRBDOpenRADOSConn(&ptr, conn, &pool->def->source) < 0)
         goto cleanup;
 
-- 
1.9.1

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