[libvirt] [PATCH libvirt-java 2/7] Implement virStorageVolResize by adding resize to StorageVol

[Wido den Hollander]

This allows us to resize storage pool volumes.

Signed-off-by: Wido den Hollander <wido at widodh.nl>
---
 src/main/java/org/libvirt/StorageVol.java  |   36 ++++++++++++++++++++++++++++
 src/main/java/org/libvirt/jna/Libvirt.java |    1 +
 2 files changed, 37 insertions(+)

diff --git a/src/main/java/org/libvirt/StorageVol.java b/src/main/java/org/libvirt/StorageVol.java
index 4b9db80..bc0c01f 100644
--- a/src/main/java/org/libvirt/StorageVol.java
+++ b/src/main/java/org/libvirt/StorageVol.java
@@ -22,6 +22,23 @@ public class StorageVol {
         static final int VIR_STORAGE_POOL_DELETE_ZEROED = 1;
     }
 
+    static final class ResizeFlags {
+        /**
+         * force allocation of new size
+        */
+        static final int ALLOCATE = 1;
+
+        /**
+         * size is relative to current
+         */
+        static final int DELTA = 2;
+
+        /**
+         * allow decrease in capacity
+         */
+        static final int SHRINK = 4;
+    }
+
     public static enum Type {
         /**
          * Regular file based volumes
@@ -33,6 +50,8 @@ public class StorageVol {
         VIR_STORAGE_VOL_BLOCK
     }
 
+
+
     /**
      * the native virStorageVolPtr.
      */
@@ -203,4 +222,21 @@ public class StorageVol {
         processError();
         return returnValue;
     }
+
+    /**
+     * Resize a volume
+     *
+     * @see <a href="http://www.libvirt.org/html/libvirt-libvirt.html#virStorageVolResize">Libvirt Documentation</a>
+     * @param capacity
+     *               new capacity for volume
+     * @param flags
+     *               flags for resizing, see libvirt API for exact flags
+     * @return 0 on success, or -1 on error
+     * @throws LibvirtException
+     */
+    public int resize(long capacity, int flags) throws LibvirtException {
+        int returnValue = libvirt.virStorageVolResize(VSVP, capacity, flags);
+        processError();
+        return returnValue;
+    }
 }
diff --git a/src/main/java/org/libvirt/jna/Libvirt.java b/src/main/java/org/libvirt/jna/Libvirt.java
index e64cb9d..8262cb9 100644
--- a/src/main/java/org/libvirt/jna/Libvirt.java
+++ b/src/main/java/org/libvirt/jna/Libvirt.java
@@ -325,6 +325,7 @@ public interface Libvirt extends Library {
     StorageVolPointer virStorageVolLookupByName(StoragePoolPointer storagePoolPtr, String name);
     StorageVolPointer virStorageVolLookupByPath(ConnectionPointer virConnectPtr, String path);
     int virStorageVolWipe(StorageVolPointer storageVolPtr, int flags);
+    int virStorageVolResize(StorageVolPointer storageVolPtr, long capacity, int flags);
 
     // Interface Methods
     int virInterfaceCreate(InterfacePointer virDevicePointer);
-- 
1.7.9.5