Step a Tails persistence partition exists on USB drive is fragile

I’ve seen it fail from time to time, and only once in Jenkins for what it remembers.

Interesting excerpt:

calling as root: udisksctl info --block-device '/dev/sda2'
call returned: [0, "/org/freedesktop/UDisks2/block_devices/sda2:
  org.freedesktop.UDisks2.Block:
    Configuration:              []
    CryptoBackingDevice:        '/'
    Device:                     /dev/sda2
    DeviceNumber:               2050
    Drive:                      '/org/freedesktop/UDisks2/drives/QEMU_QEMU_HARDDISK_1_0000_3a00_3a05_2e7_1'
    HintAuto:                   true
    HintIconName:               
    HintIgnore:                 false
    HintName:                   
    HintPartitionable:          true
    HintSymbolicIconName:       
    HintSystem:                 true
    Id:                         by-uuid-69a18ff0-ac91-4045-b5d7-624d402ad26b
    IdLabel:                    
    IdType:                     crypto_LUKS
    IdUUID:                     69a18ff0-ac91-4045-b5d7-624d402ad26b
    IdUsage:                    crypto
    IdVersion:                  1
    MDRaid:                     '/'
    MDRaidMember:               '/'
    PreferredDevice:            /dev/sda2
    ReadOnly:                   false
    Size:                       1670364672
    Symlinks:                   /dev/disk/by-id/usb-QEMU_QEMU_HARDDISK_1-0000:00:05.7-1-0:0-part2
                                /dev/disk/by-partlabel/TailsData
                                /dev/disk/by-partuuid/462cbd6f-ba04-4608-8e69-43e75e350358
                                /dev/disk/by-path/pci-0000:00:05.7-usb-0:1:1.0-scsi-0:0:0:0-part2
                                /dev/disk/by-uuid/69a18ff0-ac91-4045-b5d7-624d402ad26b
  org.freedesktop.UDisks2.Encrypted:
  org.freedesktop.UDisks2.Partition:
    Flags:              0
    IsContained:        false
    IsContainer:        false
    Name:               TailsData
    Number:             2
    Offset:             2624585728
    Size:               1670364672
    Table:              '/org/freedesktop/UDisks2/block_devices/sda'
    Type:               0fc63daf-8483-4772-8e79-3d69d8477de4
    UUID:               462cbd6f-ba04-4608-8e69-43e75e350358", ""]
calling as root: ls -1 /dev/mapper/
call returned: [0, "control\nluks-\\x28null\\x29\n", ""]
calling as root: cryptsetup status control
call returned: [4, "/dev/mapper/control is inactive.\n", ""]
calling as root: cryptsetup status luks-\x28null\x29
call returned: [4, "/dev/mapper/luks-x28nullx29 is inactive.\n", ""]
calling as root: echo asdf | cryptsetup luksOpen /dev/sda2 old
call returned: [5, "", "Cannot use device /dev/sda2 which is in use (already mapped or mounted).\n"]
    Then a Tails persistence partition exists on USB drive "old"                # features/step_definitions/usb.rb:285
      Couldn't open LUKS device '/dev/sda2' on  drive 'old'.
      <false> is not true. (Test::Unit::AssertionFailedError)
      ./features/step_definitions/usb.rb:304:in `/^a Tails persistence partition exists on USB drive "([^"]+)"$/'
      features/usb_upgrade.feature:73:in `Then a Tails persistence partition exists on USB drive "old"'
    And I shutdown Tails and wait for the computer to power off                 # features/step_definitions/common_steps.rb:532

I don’t know where this /dev/mapper/luks-x28nullx29 comes from, I never had the chance to trigger that bug with the —pause-on-fail option of our test suite to inspect the system under test. Note that x28 and x29 are the hexadecimal code for ( and ).

Feature Branch: test/10558-proper-luks-volume-quoting

Parent Task: #10288

Original created by @bertagaz on 11558 (Redmine)