[master 7/24] Add a definition for the striped "RAID level"

[dashea]

From: Vratislav Podzimek

Striped LVs are essentially RAID0 LVs as far as all the calculations go.
---
 blivet/devicelibs/lvm.py  |  2 +-
 blivet/devicelibs/raid.py | 10 +++++++++-
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/blivet/devicelibs/lvm.py b/blivet/devicelibs/lvm.py
index e3e144a..f878291 100644
--- a/blivet/devicelibs/lvm.py
+++ b/blivet/devicelibs/lvm.py
@@ -49,7 +49,7 @@
 LVM_THINP_MIN_CHUNK_SIZE = Size("64 KiB")
 LVM_THINP_MAX_CHUNK_SIZE = Size("1 GiB")

-raid_levels = raid.RAIDLevels(["raid0", "raid1", "linear"])
+raid_levels = raid.RAIDLevels(["linear", "striped", "raid1", "raid4", "raid5", "raid6", "raid10"])

ThPoolProfile = namedtuple("ThPoolProfile", ["name", "desc"])
 KNOWN_THPOOL_PROFILES = (ThPoolProfile("thin-generic", N_("Generic")),
diff --git a/blivet/devicelibs/raid.py b/blivet/devicelibs/raid.py
index 54ebce6..f2853fa 100644
--- a/blivet/devicelibs/raid.py
+++ b/blivet/devicelibs/raid.py
@@ -422,8 +422,16 @@ def _pad(self, size, chunk_size):
     def _get_recommended_stride(self, member_count):
         return member_count * 16

+
+class Striped(RAID0):
+    """ subclass with canonical lvm name """
+    name = 'striped'
+    names = [name]
+
 RAID0 = RAID0()
 ALL_LEVELS.add_raid_level(RAID0)
+Striped = Striped()
+ALL_LEVELS.add_raid_level(Striped)

class RAID1(RAIDn):
@@ -668,7 +676,7 @@ class Single(ErsatzRAID):

class Dup(RAIDLevel):

-    """ A RAID level which expresses one way btrfs metadata may be distributed.
+    """ A RAID level which expresses one way btrfs metadata may be distriuted.

For this RAID level, duplication occurs within a single block device.
     """