[gparted] Warn when an LVM2 PV is a member of a damaged VG (#160878)

[Curtis Gedak <gedakc src gnome org>]

commit ea1c0c023e4a9c10605a74c7e756453c0e2e16fd
Author: Mike Fleetwood <mike fleetwood googlemail com>
Date:   Sun Feb 12 14:44:50 2012 +0000

    Warn when an LVM2 PV is a member of a damaged VG (#160878)
    
    Generate a warning for each LVM2 Physical Volume which is a member of a
    Volume Group which has other members missing.
    
    Bug #160787 - lvm support

 include/LVM2_PV_Info.h |    2 +-
 src/LVM2_PV_Info.cc    |   27 ++++++++++++++++++++++++---
 src/lvm2_pv.cc         |    2 +-
 3 files changed, 26 insertions(+), 5 deletions(-)
---
diff --git a/include/LVM2_PV_Info.h b/include/LVM2_PV_Info.h
index f3edb23..aa89b8c 100644
--- a/include/LVM2_PV_Info.h
+++ b/include/LVM2_PV_Info.h
@@ -42,7 +42,7 @@ public:
 	Byte_Value get_free_bytes( const Glib::ustring & path ) ;
 	bool has_active_lvs( const Glib::ustring & path ) ;
 	bool is_vg_exported( const Glib::ustring & vgname ) ;
-	std::vector<Glib::ustring> get_error_messages() ;
+	std::vector<Glib::ustring> get_error_messages( const Glib::ustring & path ) ;
 private:
 	void initialize_if_required() ;
 	void set_command_found() ;
diff --git a/src/LVM2_PV_Info.cc b/src/LVM2_PV_Info.cc
index a882fb5..76ef257 100644
--- a/src/LVM2_PV_Info.cc
+++ b/src/LVM2_PV_Info.cc
@@ -50,7 +50,8 @@ enum PV_ATTRIBUTE
 //                         "/dev/sda13,830472192,GParted_VG3,wz--n-,,",
 //                         "/dev/sda14,1828716544,GParted-VG4,wzx-n-,lvol0,-wi---",
 //                         "/dev/sda14,1828716544,GParted-VG4,wzx-n-,,"]
-//  error_messages      - String vector storing error messsages.
+//  error_messages      - String vector storing whole cache error
+//                        messsages.
 
 
 //Initialize static data elements
@@ -157,10 +158,30 @@ bool LVM2_PV_Info::is_vg_exported( const Glib::ustring & vgname )
 	return false ;
 }
 
-std::vector<Glib::ustring> LVM2_PV_Info::get_error_messages()
+std::vector<Glib::ustring> LVM2_PV_Info::get_error_messages( const Glib::ustring & path )
 {
 	initialize_if_required() ;
-	return error_messages ;
+	if ( ! error_messages .empty() )
+		//Return whole cache error messages as first choice
+		return error_messages ;
+
+	std::vector<Glib::ustring> partition_specific_messages ;
+	partition_specific_messages .clear() ;
+	Glib::ustring temp ;
+
+	//Check for partition specific message: partial VG
+	Glib::ustring vg_bits = get_pv_attr_by_path( path, PVATTR_VG_BITS ) ;
+	//4rd "bit" is partial flag.  E.g.
+	//  "wz--n-" all PVs exist, "wz-pn-" one or move PVs missing.
+	//  Treat any non-hyphen character as damaged.
+	if ( vg_bits .length() >= 4 && vg_bits [3] != '-' )
+	{
+		temp = _("One or more Physical Volumes belonging to the Volume Group is missing.") ;
+		temp += "\n" ;
+		partition_specific_messages .push_back ( temp ) ;
+	}
+
+	return partition_specific_messages ;
 }
 
 //Private methods
diff --git a/src/lvm2_pv.cc b/src/lvm2_pv.cc
index f168497..d085a8e 100644
--- a/src/lvm2_pv.cc
+++ b/src/lvm2_pv.cc
@@ -43,7 +43,7 @@ void lvm2_pv::set_used_sectors( Partition & partition )
 	if ( free_bytes >= 0 )
 		partition .Set_Unused( Utils::round( double(free_bytes) / double(partition .sector_size) ) ) ;
 
-	std::vector<Glib::ustring> error_messages = lvm2_pv_info .get_error_messages() ;
+	std::vector<Glib::ustring> error_messages = lvm2_pv_info .get_error_messages( partition .get_path() ) ;
 	if ( ! error_messages .empty() )
 	{
 		for ( unsigned int i = 0 ; i < error_messages .size() ; i ++ )