From 0af98556acc8c06ca535b2cd66a814173cf45443 Mon Sep 17 00:00:00 2001
From: Chantara Tith <tith.chantara@gmail.com>
Date: Wed, 25 May 2016 03:13:23 +0700
Subject: [PATCH] Implement lvm PV resizing

---
 src/fs/lvm2_pv.cpp | 17 ++++++++++++++---
 src/fs/lvm2_pv.h   |  2 +-
 2 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/src/fs/lvm2_pv.cpp b/src/fs/lvm2_pv.cpp
index 5a223b1..fa8e17c 100644
--- a/src/fs/lvm2_pv.cpp
+++ b/src/fs/lvm2_pv.cpp
@@ -47,7 +47,9 @@ lvm2_pv::lvm2_pv(qint64 firstsector, qint64 lastsector, qint64 sectorsused, cons
 void lvm2_pv::init()
 {
     m_Create = findExternal(QStringLiteral("lvm")) ? cmdSupportFileSystem : cmdSupportNone;
-    m_Check = findExternal(QStringLiteral("lvm")) ? cmdSupportFileSystem : cmdSupportNone;
+    m_Check  = findExternal(QStringLiteral("lvm")) ? cmdSupportFileSystem : cmdSupportNone;
+    m_Grow   = findExternal(QStringLiteral("lvm")) ? cmdSupportFileSystem : cmdSupportNone;
+    m_Shrink = findExternal(QStringLiteral("lvm")) ? cmdSupportFileSystem : cmdSupportNone;
 
     m_GetLabel = cmdSupportCore;
     m_UpdateUUID = findExternal(QStringLiteral("lvm")) ? cmdSupportFileSystem : cmdSupportNone;
@@ -69,8 +71,8 @@ bool lvm2_pv::supportToolFound() const
         m_Create != cmdSupportNone &&
         m_Check != cmdSupportNone &&
         m_UpdateUUID != cmdSupportNone &&
-//          m_Grow != cmdSupportNone &&
-//          m_Shrink != cmdSupportNone &&
+        m_Grow != cmdSupportNone &&
+        m_Shrink != cmdSupportNone &&
 //          m_Copy != cmdSupportNone &&
         m_Move != cmdSupportNone &&
         m_Backup != cmdSupportNone &&
@@ -106,6 +108,15 @@ bool lvm2_pv::remove(Report& report, const QString& deviceNode) const
     return cmd.run(-1) && cmd.exitCode() == 0;
 }
 
+bool lvm2_pv::resize(Report& report, const QString& deviceNode, qint64 length) const
+{
+    // TODO: check if the it is legal to reize
+    const QString len = QString::number(length / 512) + QStringLiteral("s");
+
+    ExternalCommand cmd(report, QStringLiteral("lvm"), { QStringLiteral("pvresize"), QStringLiteral("--yes"), QStringLiteral("--setphysicalvolumesize"), len, deviceNode });
+    return cmd.run(-1) && cmd.exitCode() == 0;
+}
+
 bool lvm2_pv::updateUUID(Report& report, const QString& deviceNode) const
 {
     ExternalCommand cmd(report, QStringLiteral("lvm"), { QStringLiteral("pvchange"), QStringLiteral("--uuid"), deviceNode });
diff --git a/src/fs/lvm2_pv.h b/src/fs/lvm2_pv.h
index e687d92..c015cb2 100644
--- a/src/fs/lvm2_pv.h
+++ b/src/fs/lvm2_pv.h
@@ -47,7 +47,7 @@ public:
     bool check(Report& report, const QString& deviceNode) const override;
     bool create(Report& report, const QString& deviceNode) const override;
     bool remove(Report& report, const QString& deviceNode) const override;
-//          bool resize(Report& report, const QString& deviceNode, qint64 length) const override;
+    bool resize(Report& report, const QString& deviceNode, qint64 length) const override;
 //          bool writeLabel(Report& report, const QString& deviceNode, const QString& newLabel) override;
     bool updateUUID(Report& report, const QString& deviceNode) const override;
     bool canMount(const QString & deviceNode, const QString & mountPoint) const override;