[PATCH v2] qemu_block: Refactor qemuBlockExportAddNBD()

Kristina Hanicova posted 1 patch 2 years, 5 months ago
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git fetch https://github.com/patchew-project/libvirt tags/patchew/92cb238f200c4ee37b78a486d10d20d69520606a.1635261472.git.khanicov@redhat.com
src/qemu/qemu_block.c | 33 +++++++++++++--------------------
1 file changed, 13 insertions(+), 20 deletions(-)
[PATCH v2] qemu_block: Refactor qemuBlockExportAddNBD()
Posted by Kristina Hanicova 2 years, 5 months ago
This is v2 of: https://listman.redhat.com/archives/libvir-list/2021-October/msg01035.html

Diff to v1:
* negation of 'if' with switched body (proposed by Peter)

Signed-off-by: Kristina Hanicova <khanicov@redhat.com>
---
 src/qemu/qemu_block.c | 33 +++++++++++++--------------------
 1 file changed, 13 insertions(+), 20 deletions(-)

diff --git a/src/qemu/qemu_block.c b/src/qemu/qemu_block.c
index 34fdec2c4b..b8e70f6a83 100644
--- a/src/qemu/qemu_block.c
+++ b/src/qemu/qemu_block.c
@@ -3592,28 +3592,21 @@ qemuBlockExportAddNBD(virDomainObj *vm,
                       const char *bitmap)
 {
     qemuDomainObjPrivate *priv = vm->privateData;
+    g_autoptr(virJSONValue) nbdprops = NULL;
+    const char *bitmaps[2] = { bitmap, NULL };
 
-    if (virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_BLOCKDEV)) {
-        if (virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_BLOCK_EXPORT_ADD)) {
-            g_autoptr(virJSONValue) nbdprops = NULL;
-            const char *bitmaps[2] = { bitmap, NULL };
+    /* older qemu versions didn't support configuring the exportname and
+     * took the 'drivealias' as the export name */
+    if (!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_BLOCKDEV))
+        return qemuMonitorNBDServerAdd(priv->mon, drivealias, NULL, writable, NULL);
 
-            if (!(nbdprops = qemuBlockExportGetNBDProps(src->nodeformat,
-                                                        exportname,
-                                                        writable,
-                                                        bitmaps)))
-                return -1;
+    if (!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_BLOCK_EXPORT_ADD))
+        return qemuMonitorNBDServerAdd(priv->mon, src->nodeformat,
+                                       exportname, writable, bitmap);
 
-            return qemuMonitorBlockExportAdd(priv->mon, &nbdprops);
-        } else {
-            return qemuMonitorNBDServerAdd(priv->mon, src->nodeformat,
-                                           exportname, writable, bitmap);
-        }
-    } else {
-        /* older qemu versions didn't support configuring the exportname and
-         * took the 'drivealias' as the export name */
-        return qemuMonitorNBDServerAdd(priv->mon, drivealias, NULL, writable, NULL);
-    }
+    if (!(nbdprops = qemuBlockExportGetNBDProps(src->nodeformat, exportname,
+                                                writable, bitmaps)))
+        return -1;
 
-    return 0;
+    return qemuMonitorBlockExportAdd(priv->mon, &nbdprops);
 }
-- 
2.31.1

Re: [PATCH v2] qemu_block: Refactor qemuBlockExportAddNBD()
Posted by Michal Prívozník 2 years, 4 months ago
On 10/26/21 5:19 PM, Kristina Hanicova wrote:
> This is v2 of: https://listman.redhat.com/archives/libvir-list/2021-October/msg01035.html
> 
> Diff to v1:
> * negation of 'if' with switched body (proposed by Peter)
> 
> Signed-off-by: Kristina Hanicova <khanicov@redhat.com>
> ---
>  src/qemu/qemu_block.c | 33 +++++++++++++--------------------
>  1 file changed, 13 insertions(+), 20 deletions(-)

The patch is correct, but I think the commit message can be made
cleaner. We don't need a reference to older versions, but what I'd
appreciate is a short description (be it one sentence long) what's
happening in the commit. Can you please reply with something like that?
I'll update to commit message and push.

Michal