[gparted] Restore busy detection of unknown mounted file systems (#723842)

[Curtis Gedak <gedakc src gnome org>]

commit 49a2e19462fdbe4b28a53cc21a2ddd29d256ff41
Author: Mike Fleetwood <mike fleetwood googlemail com>
Date:   Tue Mar 18 22:10:40 2014 +0000

    Restore busy detection of unknown mounted file systems (#723842)
    
    Previous commit:
        Make partition busy detection method selectable per file system
        (#723842)
    causes GParted to no longer detect an unknown mounted file system as
    busy.
    
    This is needed because there are many less popular file systems which
    Linux can mount but GParted doesn't recognise, such as: Acorn ADFS,
    AFFS, BeFS, BFS, etc.  Encountering an unrecognised mounted device can
    also occur with btrfs on Linux 3.4 and earlier when the mounting device
    is deleted from a multi-device btrfs file system.  Happens because
    /proc/mounts continues to show the original mounting device even after
    that device was deleted from the file system.
    
        # mkfs.btrfs /dev/sdb1
        # mount /dev/sdb1 /mnt/1
        # btrfs device add /dev/sdb2 /mnt/1
        # btrfs device delete /dev/sdb1 /mnt/1
        # btrfs filesystem sync /mnt/1
        # grep btrfs /proc/mounts
        /dev/sdb1 /mnt/1 btrfs rw,seclabel,relatime,ssd,space_cache 0 0
        # blkid /dev/sdb1
        # btrfs filesystem show /dev/sdb1
        # blkid /dev/sdb2
        /dev/sdb2: UUID="9c75647c-217a-4718-bcc7-f3ccd8cc7dc6" 
UUID_SUB="b5d43630-80d4-42ac-b406-185e97cd5bbe" TYPE="btrfs"
        # btrfs filesystem show /dev/sdb2
        Label: none  uuid: 9c75647c-217a-4718-bcc7-f3ccd8cc7dc6
                Total devices 1 FS bytes used 28.00KB
                devid    2 size 2.00GB used 1.02GB path /dev/sdb2
    
    Reinstate the search for mounted partitions for busy detection even for
    unrecognised file system types.
    
    Bug #723842 - GParted resizes the wrong filesystem (does not pass the
                  devid to btrfs filesystem resize)

 src/GParted_Core.cc |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)
---
diff --git a/src/GParted_Core.cc b/src/GParted_Core.cc
index 5af510b..b0cf751 100644
--- a/src/GParted_Core.cc
+++ b/src/GParted_Core.cc
@@ -1590,8 +1590,14 @@ bool GParted_Core::is_busy( FILESYSTEM fstype, const Glib::ustring & path )
        }
        else
        {
+               //Still search GParted internal mounted partitions map in case an
+               //  unknown file system is mounted
+               iter_mp = mount_info .find( path ) ;
+               if ( iter_mp != mount_info .end() )
+                       busy = true ;
+
                //Custom checks for recognised but other not-supported file system types
-               busy = ( fstype == FS_LINUX_SWRAID && Utils::swraid_member_is_active( path ) ) ;
+               busy |= ( fstype == FS_LINUX_SWRAID && Utils::swraid_member_is_active( path ) ) ;
        }
 
        return busy ;