Bug#749599: /sbin/lvm: lvconvert --type cache-pool ... complains: "WARNING: Unrecognised segment type cache-pool"

[Wolfgang Weisselberg]

Package: lvm2
Version: 2.02.106-1
Severity: normal
File: /sbin/lvm

Dear Maintainer,

   * What led up to the situation?
     
testing out/playing with the new LVM cache features

   * What exactly did you do (or not do) that was effective (or
     ineffective)?

1. Created a new PV in /dev/sde1 on a "32GB" USB3 stick (/dev/sde)
   using
        # gparted /dev/sde

2. Create VG 'cache_vg':
        # vgcreate cache_vg /dev/sde1
        Volume group "cache_vg" successfully created

3. Create 2 LVs:
        # lvcreate -n Cache_data -L 5G /dev/cache_vg
        Logical volume "Cache_data" created
        # lvcreate -n Cache_meta -L 8M /dev/cache_vg    
        Logical volume "Cache_meta" created

4. *trying* to convert the 2 LVs to a cache-pool.  FAILS:
        # lvconvert --type cache-pool --poolmetadata cache_vg/Cache_meta  cache_vg/Cache_data
        WARNING: Unrecognised segment type cache-pool

   * What was the outcome of this action?

lvconvert tells me it doesn't know about "cache-pool".

   * What outcome did you expect instead?

Given:
        # lvconvert -h | grep -A 7 cache-pool
        lvconvert --type cache-pool
                [--cachemode CacheMode]
                [--chunksize size]
                [--poolmetadata CacheMetadataLogicalVolume[Path] |
                [--poolmetadatasize size]
                [--poolmetadataspare {y|n}]]
                CacheDataLogicalVolume[Path]

I expected lvconvert to know 'cache-pool'.

Compiling from source, the test "shell/lvcreate-cache.sh" also
fails on this.


-- System Information:
Debian Release: jessie/sid
  APT prefers testing-updates
  APT policy: (500, 'testing-updates'), (500, 'testing'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.14-1-amd64 (SMP w/8 CPU cores)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages lvm2 depends on:
ii  dmsetup                   2:1.02.85-1
ii  init-system-helpers       1.18
ii  initscripts               2.88dsf-53
ii  libc6                     2.18-7
ii  libdevmapper-event1.02.1  2:1.02.85-1
ii  libdevmapper1.02.1        2:1.02.85-1
ii  libreadline5              5.2+dfsg-2
ii  libudev1                  204-8
ii  lsb-base                  4.1+Debian12

lvm2 recommends no packages.

Versions of packages lvm2 suggests:
pn  thin-provisioning-tools  <none>

-- Configuration Files:
/etc/lvm/lvm.conf changed:      (lines starting with '\s*#' removed)
config {
    checks = 1
    abort_on_errors = 0
    profile_dir = "/etc/lvm/profile"
}
devices {
    dir = "/dev"
    scan = [ "/dev" ]
    obtain_device_list_from_udev = 1
    preferred_names = [ ]
    filter = [ "a/.*/" ]
    cache_dir = "/run/lvm"
    cache_file_prefix = ""
    write_cache_state = 1
    sysfs_scan = 1
    multipath_component_detection = 1
    md_component_detection = 1
    md_chunk_alignment = 1
    data_alignment_detection = 1
    data_alignment = 0
    data_alignment_offset_detection = 1
    ignore_suspended_devices = 0
    ignore_lvm_mirrors = 1
    disable_after_error_count = 0
    require_restorefile_with_uuid = 1
    pv_min_size = 2048
    issue_discards = 0
}
allocation {
    maximise_cling = 1
    use_blkid_wiping = 1
    wipe_signatures_when_zeroing_new_lvs = 1
    mirror_logs_require_separate_pvs = 0
    cache_pool_metadata_require_separate_pvs = 0
    thin_pool_metadata_require_separate_pvs = 0
}
log {
    verbose = 0
    silent = 0
    syslog = 1
    overwrite = 0
    level = 0
    indent = 1
    command_names = 0
    prefix = "  "
    debug_classes = [ "memory", "devices", "activation", "allocation",
		      "lvmetad", "metadata", "cache", "locking" ]
}
backup {
    backup = 1
    backup_dir = "/etc/lvm/backup"
    archive = 1
    archive_dir = "/etc/lvm/archive"
    retain_min = 10
    retain_days = 30
}
shell {
    history_size = 1000
}
global {
    umask = 077
    test = 0
    units = "h"
    si_unit_consistency = 1
    suffix = 1
    activation = 1
    proc = "/proc"
    locking_type = 1
    wait_for_locks = 1
    fallback_to_clustered_locking = 1
    fallback_to_local_locking = 1
    locking_dir = "/run/lock/lvm"
    prioritise_write_locks = 1
    abort_on_internal_errors = 0
    detect_internal_vg_cache_corruption = 0
    metadata_read_only = 0
    mirror_segtype_default = "raid1"
    raid10_segtype_default = "raid10"
    use_lvmetad = 0
}
activation {
    checks = 0
    udev_sync = 1
    udev_rules = 1
    verify_udev_operations = 0
    retry_deactivation = 1
    missing_stripe_filler = "error"
    use_linear_target = 1
    reserved_stack = 64
    reserved_memory = 8192
    process_priority = -18
    raid_region_size = 512
    readahead = "auto"
    raid_fault_policy = "warn"
    mirror_log_fault_policy = "allocate"
    mirror_image_fault_policy = "remove"
    snapshot_autoextend_threshold = 100
    snapshot_autoextend_percent = 20
    thin_pool_autoextend_threshold = 100
    thin_pool_autoextend_percent = 20
    use_mlockall = 0
    monitoring = 1
    polling_interval = 15
}
report {
}
metadata {
    vgmetadatacopies = 200
}
dmeventd {
    mirror_library = "libdevmapper-event-lvm2mirror.so"
    snapshot_library = "libdevmapper-event-lvm2snapshot.so"
    thin_library = "libdevmapper-event-lvm2thin.so"
}


-- no debconf information