[gparted] Add detection of bcache (#183)

[Mike Fleetwood <mfleetwo src gnome org>]

commit e5041954cf4bcaf1f711acf85ebc47a3551e8adb
Author: Mike Fleetwood <mike fleetwood googlemail com>
Date:   Tue Jan 4 22:40:40 2022 +0000

    Add detection of bcache (#183)
    
    Use blkid to detect bcache formatted devices.  Requires blkid from
    util-linux >= 2.24 for detection of bcache devices [1].
    
    Use util-linux's FS images when testing GParted detection.
        # wget 
http://git.kernel.org/cgit/utils/util-linux/util-linux.git/plain/tests/ts/blkid/images-fs/bcache-B.img.xz
        # xzcat bcache-B.img.xz > /dev/sdb1
        # wget 
http://git.kernel.org/cgit/utils/util-linux/util-linux.git/plain/tests/ts/blkid/images-fs/bcache-C.img.xz
        # xzcat bcache-C.img.xz > /dev/sdc1
        # blkid /dev/sdb1 /dev/sdc1
        /dev/sdb1: UUID="8fb7f716-4c19-4517-bfbb-6f4a2becad60" TYPE="bcache" PARTUUID="f8f1485e-01"
        /dev/sdc1: UUID="7a343627-ac87-4bf0-b76f-46067cbc9b8c" TYPE="bcache" PARTUUID="f46e8c86-01"
    
    To tidy-up after testing GParted detection, stop the bcache device in
    case it was automatically started and wipe the signatures.  This is to
    prevent udev rules from automatically starting the bcache device on
    every subsequent reboot.
        # echo 1 > /sys/block/sdb/sdb1/bcache/stop
        # wipefs -a /dev/sdb1 /dev/sdc1
    
    Closes #183 - Basic support for bcache

 include/Utils.h     | 21 +++++++++++----------
 src/GParted_Core.cc |  2 ++
 src/Utils.cc        |  2 ++
 3 files changed, 15 insertions(+), 10 deletions(-)
---
diff --git a/include/Utils.h b/include/Utils.h
index 0e0e6865..9eed1e52 100644
--- a/include/Utils.h
+++ b/include/Utils.h
@@ -96,18 +96,19 @@ enum FSType
        // Other recognised file system types
        FS_APFS            = 28,
        FS_ATARAID         = 29,
-       FS_BITLOCKER       = 30,
-       FS_GRUB2_CORE_IMG  = 31,
-       FS_ISO9660         = 32,
-       FS_LINUX_SWRAID    = 33,
-       FS_LINUX_SWSUSPEND = 34,
-       FS_REFS            = 35,
-       FS_UFS             = 36,
-       FS_ZFS             = 37,
+       FS_BCACHE          = 30,
+       FS_BITLOCKER       = 31,
+       FS_GRUB2_CORE_IMG  = 32,
+       FS_ISO9660         = 33,
+       FS_LINUX_SWRAID    = 34,
+       FS_LINUX_SWSUSPEND = 35,
+       FS_REFS            = 36,
+       FS_UFS             = 37,
+       FS_ZFS             = 38,
 
        // Partition space usage colours
-       FS_USED            = 38,
-       FS_UNUSED          = 39
+       FS_USED            = 39,
+       FS_UNUSED          = 40
 } ;
 
 enum SIZE_UNIT
diff --git a/src/GParted_Core.cc b/src/GParted_Core.cc
index 4ad347de..343e7709 100644
--- a/src/GParted_Core.cc
+++ b/src/GParted_Core.cc
@@ -1323,6 +1323,8 @@ FSType GParted_Core::detect_filesystem(const PedDevice *lp_device, const PedPart
                        return FS_UFS;
                else if ( fsname == "apfs" )
                        return FS_APFS;
+               else if (fsname == "bcache")
+                       return FS_BCACHE;
                else if ( fsname == "BitLocker" )
                        return FS_BITLOCKER;
                else if ( fsname == "iso9660" )
diff --git a/src/Utils.cc b/src/Utils.cc
index b59c22a0..6a1c181b 100644
--- a/src/Utils.cc
+++ b/src/Utils.cc
@@ -179,6 +179,7 @@ Glib::ustring Utils::get_color(FSType fstype)
                case FS_XFS:             return "#EED680";  // Accent Yellow
                case FS_APFS:            return "#874986";  // Magenta Dark [*]
                case FS_ATARAID:         return "#5A4733";  // Brown Dark [+]
+               case FS_BCACHE:          return "#E0C39E";  // Face Skin Medium
                case FS_BITLOCKER:       return "#494066";  // Purple Shadow
                case FS_GRUB2_CORE_IMG:  return "#666666";  // Dark Gray [*]
                case FS_ISO9660:         return "#D3D3D3";  // Light Gray [*]
@@ -371,6 +372,7 @@ const Glib::ustring Utils::get_filesystem_string(FSType fstype)
                case FS_XFS:             return "xfs";
                case FS_APFS:            return "apfs";
                case FS_ATARAID:         return "ataraid";
+               case FS_BCACHE:          return "bcache";
                case FS_BITLOCKER:       return "bitlocker";
                case FS_GRUB2_CORE_IMG:  return "grub2 core.img";
                case FS_ISO9660:         return "iso9660";