From c3c718615d1c33e5b937913489245d7a7d7ae728 Mon Sep 17 00:00:00 2001
From: Chantara Tith <tith.chantara@gmail.com>
Date: Mon, 1 Aug 2016 19:20:20 +0700
Subject: [PATCH] Add LVM snapshotting functionality.

---
 src/core/lvmdevice.cpp | 17 +++++++++++++++++
 src/core/lvmdevice.h   |  1 +
 2 files changed, 18 insertions(+)

diff --git a/src/core/lvmdevice.cpp b/src/core/lvmdevice.cpp
index 8b6c8e1..72eabde 100644
--- a/src/core/lvmdevice.cpp
+++ b/src/core/lvmdevice.cpp
@@ -339,6 +339,23 @@ bool LvmDevice::createLV(Report& report, LvmDevice& dev, Partition& part, const
     return (cmd.run(-1) && cmd.exitCode() == 0);
 }
 
+bool LvmDevice::createLVSnapshot(Report& report, LvmDevice& dev, Partition& lvpart, const QString& name, const qint64 extents)
+{
+    Q_UNUSED(dev);
+    QString numExtents = (extents > 0) ? QString::number(extents) :
+        QString::number(lvpart.length());
+    ExternalCommand cmd(report, QStringLiteral("lvm"),
+            { QStringLiteral("lvcreate"),
+              QStringLiteral("--yes"),
+              QStringLiteral("--extents"),
+              numExtents,
+              QStringLiteral("--snapshot"),
+              QStringLiteral("--name"),
+              name,
+              lvpart.partitionPath() });
+    return (cmd.run(-1) && cmd.exitCode() == 0);
+}
+
 bool LvmDevice::resizeLV(Report& report, LvmDevice& dev, Partition& part)
 {
     Q_UNUSED(dev);
diff --git a/src/core/lvmdevice.h b/src/core/lvmdevice.h
index b69f52f..a59935d 100644
--- a/src/core/lvmdevice.h
+++ b/src/core/lvmdevice.h
@@ -66,6 +66,7 @@ public:
 
     static bool removeLV(Report& report, LvmDevice& dev, Partition& part);
     static bool createLV(Report& report, LvmDevice& dev, Partition& part, const QString& lvname);
+    static bool createLVSnapshot(Report& report, LvmDevice& dev, Partition& lvpart, const QString& name, const qint64 extents = 0);
     static bool resizeLV(Report& report, LvmDevice& dev, Partition& part);
 
     static bool removePV(Report& report, LvmDevice& dev, const QString& pvPath);