[libvirt] [test-API][PATCH] Add volume resize case with delta flag

[Wayne Sun]

Only storage backend for RBD (RADOS Block Device), FS and directory
have the resizeVol function, so only testing dir volume here.

Flags 'allocate' and 'shrik' are with bug:
https://bugzilla.redhat.com/show_bug.cgi?id=804516
they are not supported yet, so leave the case for later.

* using volume resize API with flag VIR_STORAGE_VOL_RESIZE_DELTA
* using volume info API to get volume info and check
* add dir volume resize conf

Signed-off-by: Wayne Sun <gsun at redhat.com>
---
 cases/storage_dir_vol_resize_delta.conf |   47 +++++++++++++++++++
 repos/storage/vol_resize_delta.py       |   75 +++++++++++++++++++++++++++++++
 2 files changed, 122 insertions(+), 0 deletions(-)
 create mode 100644 cases/storage_dir_vol_resize_delta.conf
 create mode 100644 repos/storage/vol_resize_delta.py

diff --git a/cases/storage_dir_vol_resize_delta.conf b/cases/storage_dir_vol_resize_delta.conf
new file mode 100644
index 0000000..58e15bf
--- /dev/null
+++ b/cases/storage_dir_vol_resize_delta.conf
@@ -0,0 +1,47 @@
+storage:create_dir_pool
+    poolname
+        $defaultpoolname
+
+storage:create_dir_volume
+    poolname
+        $defaultpoolname
+    volname
+        $defaultvolumename
+    volformat
+        $defaultvolumetype
+    capacity
+        $defaultvolumesize
+
+storage:vol_resize_delta
+    poolname
+        $defaultpoolname
+    volname
+        $defaultvolumename
+    capacity
+        1M
+
+storage:vol_resize_delta
+    poolname
+        $defaultpoolname
+    volname
+        $defaultvolumename
+    capacity
+        2G
+
+storage:vol_resize_delta
+    poolname
+        $defaultpoolname
+    volname
+        $defaultvolumename
+    capacity
+        4096K
+
+storage:delete_dir_volume
+    poolname
+        $defaultpoolname
+    volname
+        $defaultvolumename
+
+storage:destroy_pool
+    poolname
+        $defaultpoolname
diff --git a/repos/storage/vol_resize_delta.py b/repos/storage/vol_resize_delta.py
new file mode 100644
index 0000000..a87941e
--- /dev/null
+++ b/repos/storage/vol_resize_delta.py
@@ -0,0 +1,75 @@
+#!/usr/bin/env python
+# volume resize testing with delta flags, libvirt storage
+# driver only support dir now
+
+import libvirt
+from libvirt import libvirtError
+
+from src import sharedmod
+from utils import utils
+
+required_params = ('poolname', 'volname', 'capacity',)
+optional_params = {}
+
+def vol_resize_delta(params):
+    """test volume resize with delta flags"""
+
+    global logger
+    logger = params['logger']
+    poolname = params['poolname']
+    volname = params['volname']
+    capacity = params['capacity']
+
+    logger.info("the poolname is %s, volname is %s" %
+                (poolname, volname))
+
+    logger.info("the capacity given is %s" % capacity)
+    out = utils.get_capacity_suffix_size(capacity)
+    capacity_val = out['capacity_byte']
+    logger.debug("the capacity to byte is %s" % capacity_val)
+
+    conn = sharedmod.libvirtobj['conn']
+    try:
+        poolobj = conn.storagePoolLookupByName(poolname)
+        vol = poolobj.storageVolLookupByName(volname)
+
+        logger.info("get volume info before resize")
+        out = vol.info()
+        pre_capacity = out[1]
+        pre_allocation = out[2]
+        logger.info("volume capacity is %s bytes, allocation is %s bytes" %
+                    (pre_capacity, pre_allocation))
+
+        flag = libvirt.VIR_STORAGE_VOL_RESIZE_DELTA
+        logger.info("resize %s with capacity %s in pool %s using flag: %s"
+                    % (volname, capacity, poolname, flag))
+
+        vol.resize(capacity_val, flag)
+
+        logger.info("get volume info after resize")
+        out = vol.info()
+        post_capacity = out[1]
+        post_allocation = out[2]
+        logger.info("volume capacity is %s bytes, allocation is %s bytes" %
+                    (post_capacity, post_allocation))
+
+        logger.info("check resize effect")
+        if post_capacity - pre_capacity == capacity_val:
+            logger.info("increased size is expected")
+        else:
+            logger.error("increase size not equal to set, resize failed")
+            return 1
+
+        if pre_allocation == post_allocation:
+            logger.info("allocation is expected")
+        else:
+            logger.error("allocation changed, resize failed")
+            return 1
+
+        logger.info("resize succeed")
+
+    except libvirtError, e:
+        logger.error("libvirt call failed: " + str(e))
+        return 1
+
+    return 0
-- 
1.7.1