## root / src / Ganeti / Types.hs @ 01eea342

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{-# LANGUAGE TemplateHaskell #-} |
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{-| Some common Ganeti types. |

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This holds types common to both core work, and to htools. Types that |

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are very core specific (e.g. configuration objects) should go in |

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'Ganeti.Objects', while types that are specific to htools in-memory |

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representation should go into 'Ganeti.HTools.Types'. |

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-} |

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{- |

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Copyright (C) 2012 Google Inc. |

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This program is free software; you can redistribute it and/or modify |

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it under the terms of the GNU General Public License as published by |

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the Free Software Foundation; either version 2 of the License, or |

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(at your option) any later version. |

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This program is distributed in the hope that it will be useful, but |

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WITHOUT ANY WARRANTY; without even the implied warranty of |

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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |

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General Public License for more details. |

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You should have received a copy of the GNU General Public License |

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along with this program; if not, write to the Free Software |

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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |

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02110-1301, USA. |

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-} |

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module Ganeti.Types |

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( AllocPolicy(..) |

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, allocPolicyFromRaw |

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, allocPolicyToRaw |

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, InstanceStatus(..) |

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, instanceStatusFromRaw |

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, instanceStatusToRaw |

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, DiskTemplate(..) |

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, diskTemplateToRaw |

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, diskTemplateFromRaw |

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, NonNegative |

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, fromNonNegative |

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, mkNonNegative |

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, Positive |

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, fromPositive |

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, mkPositive |

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, Negative |

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, fromNegative |

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, mkNegative |

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, NonEmpty |

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, fromNonEmpty |

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, mkNonEmpty |

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, NonEmptyString |

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, MigrationMode(..) |

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, VerifyOptionalChecks(..) |

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, DdmSimple(..) |

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, DdmFull(..) |

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, CVErrorCode(..) |

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, cVErrorCodeToRaw |

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, Hypervisor(..) |

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, OobCommand(..) |

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, StorageType(..) |

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, NodeEvacMode(..) |

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, FileDriver(..) |

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, InstCreateMode(..) |

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, RebootType(..) |

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, ExportMode(..) |

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, IAllocatorTestDir(..) |

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, IAllocatorMode(..) |

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, iAllocatorModeToRaw |

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, NetworkType(..) |

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, networkTypeToRaw |

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, NICMode(..) |

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, nICModeToRaw |

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, JobStatus(..) |

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, jobStatusToRaw |

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, jobStatusFromRaw |

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, FinalizedJobStatus(..) |

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, finalizedJobStatusToRaw |

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, JobId |

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, fromJobId |

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, makeJobId |

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, makeJobIdS |

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, RelativeJobId |

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, JobIdDep(..) |

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, JobDependency(..) |

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, OpSubmitPriority(..) |

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, opSubmitPriorityToRaw |

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, OpStatus(..) |

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, opStatusToRaw |

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, opStatusFromRaw |

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, ELogType(..) |

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) where |

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import Control.Monad (liftM) |

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import qualified Text.JSON as JSON |

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import Text.JSON (JSON, readJSON, showJSON) |

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import Data.Ratio (numerator, denominator) |

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import qualified Ganeti.Constants as C |

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import qualified Ganeti.THH as THH |

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import Ganeti.JSON |

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import Ganeti.Utils |

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-- * Generic types |

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-- | Type that holds a non-negative value. |

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newtype NonNegative a = NonNegative { fromNonNegative :: a } |

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deriving (Show, Eq) |

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-- | Smart constructor for 'NonNegative'. |

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mkNonNegative :: (Monad m, Num a, Ord a, Show a) => a -> m (NonNegative a) |

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mkNonNegative i | i >= 0 = return (NonNegative i) |

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| otherwise = fail $ "Invalid value for non-negative type '" ++ |

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show i ++ "'" |

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instance (JSON.JSON a, Num a, Ord a, Show a) => JSON.JSON (NonNegative a) where |

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showJSON = JSON.showJSON . fromNonNegative |

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readJSON v = JSON.readJSON v >>= mkNonNegative |

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-- | Type that holds a positive value. |

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newtype Positive a = Positive { fromPositive :: a } |

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deriving (Show, Eq) |

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-- | Smart constructor for 'Positive'. |

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mkPositive :: (Monad m, Num a, Ord a, Show a) => a -> m (Positive a) |

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mkPositive i | i > 0 = return (Positive i) |

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| otherwise = fail $ "Invalid value for positive type '" ++ |

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show i ++ "'" |

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instance (JSON.JSON a, Num a, Ord a, Show a) => JSON.JSON (Positive a) where |

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showJSON = JSON.showJSON . fromPositive |

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readJSON v = JSON.readJSON v >>= mkPositive |

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-- | Type that holds a negative value. |

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newtype Negative a = Negative { fromNegative :: a } |

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deriving (Show, Eq) |

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-- | Smart constructor for 'Negative'. |

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mkNegative :: (Monad m, Num a, Ord a, Show a) => a -> m (Negative a) |

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mkNegative i | i < 0 = return (Negative i) |

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| otherwise = fail $ "Invalid value for negative type '" ++ |

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show i ++ "'" |

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instance (JSON.JSON a, Num a, Ord a, Show a) => JSON.JSON (Negative a) where |

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showJSON = JSON.showJSON . fromNegative |

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readJSON v = JSON.readJSON v >>= mkNegative |

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-- | Type that holds a non-null list. |

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newtype NonEmpty a = NonEmpty { fromNonEmpty :: [a] } |

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deriving (Show, Eq) |

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-- | Smart constructor for 'NonEmpty'. |

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mkNonEmpty :: (Monad m) => [a] -> m (NonEmpty a) |

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mkNonEmpty [] = fail "Received empty value for non-empty list" |

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mkNonEmpty xs = return (NonEmpty xs) |

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instance (JSON.JSON a) => JSON.JSON (NonEmpty a) where |

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showJSON = JSON.showJSON . fromNonEmpty |

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readJSON v = JSON.readJSON v >>= mkNonEmpty |

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-- | A simple type alias for non-empty strings. |

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type NonEmptyString = NonEmpty Char |

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-- * Ganeti types |

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-- | Instance disk template type. |

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$(THH.declareSADT "DiskTemplate" |

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[ ("DTDiskless", 'C.dtDiskless) |

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, ("DTFile", 'C.dtFile) |

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, ("DTSharedFile", 'C.dtSharedFile) |

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, ("DTPlain", 'C.dtPlain) |

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, ("DTBlock", 'C.dtBlock) |

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, ("DTDrbd8", 'C.dtDrbd8) |

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, ("DTRbd", 'C.dtRbd) |

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, ("DTExt", 'C.dtExt) |

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]) |

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$(THH.makeJSONInstance ''DiskTemplate) |

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instance HasStringRepr DiskTemplate where |

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fromStringRepr = diskTemplateFromRaw |

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toStringRepr = diskTemplateToRaw |

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-- | The Group allocation policy type. |

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-- |

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-- Note that the order of constructors is important as the automatic |

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-- Ord instance will order them in the order they are defined, so when |

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-- changing this data type be careful about the interaction with the |

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-- desired sorting order. |

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$(THH.declareSADT "AllocPolicy" |

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[ ("AllocPreferred", 'C.allocPolicyPreferred) |

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, ("AllocLastResort", 'C.allocPolicyLastResort) |

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, ("AllocUnallocable", 'C.allocPolicyUnallocable) |

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]) |

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$(THH.makeJSONInstance ''AllocPolicy) |

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-- | The Instance real state type. FIXME: this could be improved to |

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-- just wrap a /NormalState AdminStatus | ErrorState ErrorCondition/. |

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$(THH.declareSADT "InstanceStatus" |

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[ ("StatusDown", 'C.inststAdmindown) |

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, ("StatusOffline", 'C.inststAdminoffline) |

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, ("ErrorDown", 'C.inststErrordown) |

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, ("ErrorUp", 'C.inststErrorup) |

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, ("NodeDown", 'C.inststNodedown) |

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, ("NodeOffline", 'C.inststNodeoffline) |

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, ("Running", 'C.inststRunning) |

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, ("WrongNode", 'C.inststWrongnode) |

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]) |

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$(THH.makeJSONInstance ''InstanceStatus) |

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-- | Migration mode. |

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$(THH.declareSADT "MigrationMode" |

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[ ("MigrationLive", 'C.htMigrationLive) |

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, ("MigrationNonLive", 'C.htMigrationNonlive) |

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]) |

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$(THH.makeJSONInstance ''MigrationMode) |

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-- | Verify optional checks. |

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$(THH.declareSADT "VerifyOptionalChecks" |

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[ ("VerifyNPlusOneMem", 'C.verifyNplusoneMem) |

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]) |

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$(THH.makeJSONInstance ''VerifyOptionalChecks) |

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-- | Cluster verify error codes. |

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$(THH.declareSADT "CVErrorCode" |

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[ ("CvECLUSTERCFG", 'C.cvEclustercfgCode) |

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, ("CvECLUSTERCERT", 'C.cvEclustercertCode) |

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, ("CvECLUSTERFILECHECK", 'C.cvEclusterfilecheckCode) |

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, ("CvECLUSTERDANGLINGNODES", 'C.cvEclusterdanglingnodesCode) |

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, ("CvECLUSTERDANGLINGINST", 'C.cvEclusterdanglinginstCode) |

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, ("CvEINSTANCEBADNODE", 'C.cvEinstancebadnodeCode) |

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, ("CvEINSTANCEDOWN", 'C.cvEinstancedownCode) |

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, ("CvEINSTANCELAYOUT", 'C.cvEinstancelayoutCode) |

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, ("CvEINSTANCEMISSINGDISK", 'C.cvEinstancemissingdiskCode) |

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, ("CvEINSTANCEFAULTYDISK", 'C.cvEinstancefaultydiskCode) |

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, ("CvEINSTANCEWRONGNODE", 'C.cvEinstancewrongnodeCode) |

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, ("CvEINSTANCESPLITGROUPS", 'C.cvEinstancesplitgroupsCode) |

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, ("CvEINSTANCEPOLICY", 'C.cvEinstancepolicyCode) |

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, ("CvENODEDRBD", 'C.cvEnodedrbdCode) |

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, ("CvENODEDRBDHELPER", 'C.cvEnodedrbdhelperCode) |

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, ("CvENODEFILECHECK", 'C.cvEnodefilecheckCode) |

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, ("CvENODEHOOKS", 'C.cvEnodehooksCode) |

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, ("CvENODEHV", 'C.cvEnodehvCode) |

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, ("CvENODELVM", 'C.cvEnodelvmCode) |

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, ("CvENODEN1", 'C.cvEnoden1Code) |

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, ("CvENODENET", 'C.cvEnodenetCode) |

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, ("CvENODEOS", 'C.cvEnodeosCode) |

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, ("CvENODEORPHANINSTANCE", 'C.cvEnodeorphaninstanceCode) |

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, ("CvENODEORPHANLV", 'C.cvEnodeorphanlvCode) |

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, ("CvENODERPC", 'C.cvEnoderpcCode) |

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, ("CvENODESSH", 'C.cvEnodesshCode) |

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, ("CvENODEVERSION", 'C.cvEnodeversionCode) |

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, ("CvENODESETUP", 'C.cvEnodesetupCode) |

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, ("CvENODETIME", 'C.cvEnodetimeCode) |

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, ("CvENODEOOBPATH", 'C.cvEnodeoobpathCode) |

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, ("CvENODEUSERSCRIPTS", 'C.cvEnodeuserscriptsCode) |

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, ("CvENODEFILESTORAGEPATHS", 'C.cvEnodefilestoragepathsCode) |

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]) |

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$(THH.makeJSONInstance ''CVErrorCode) |

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-- | Dynamic device modification, just add\/remove version. |

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$(THH.declareSADT "DdmSimple" |

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[ ("DdmSimpleAdd", 'C.ddmAdd) |

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, ("DdmSimpleRemove", 'C.ddmRemove) |

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]) |

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$(THH.makeJSONInstance ''DdmSimple) |

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-- | Dynamic device modification, all operations version. |

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$(THH.declareSADT "DdmFull" |

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[ ("DdmFullAdd", 'C.ddmAdd) |

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, ("DdmFullRemove", 'C.ddmRemove) |

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, ("DdmFullModify", 'C.ddmModify) |

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]) |

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$(THH.makeJSONInstance ''DdmFull) |

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-- | Hypervisor type definitions. |

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$(THH.declareSADT "Hypervisor" |

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[ ( "Kvm", 'C.htKvm ) |

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, ( "XenPvm", 'C.htXenPvm ) |

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, ( "Chroot", 'C.htChroot ) |

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, ( "XenHvm", 'C.htXenHvm ) |

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, ( "Lxc", 'C.htLxc ) |

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, ( "Fake", 'C.htFake ) |

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]) |

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$(THH.makeJSONInstance ''Hypervisor) |

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-- | Oob command type. |

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$(THH.declareSADT "OobCommand" |

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[ ("OobHealth", 'C.oobHealth) |

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, ("OobPowerCycle", 'C.oobPowerCycle) |

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, ("OobPowerOff", 'C.oobPowerOff) |

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, ("OobPowerOn", 'C.oobPowerOn) |

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, ("OobPowerStatus", 'C.oobPowerStatus) |

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]) |

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$(THH.makeJSONInstance ''OobCommand) |

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-- | Storage type. |

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$(THH.declareSADT "StorageType" |

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[ ("StorageFile", 'C.stFile) |

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, ("StorageLvmPv", 'C.stLvmPv) |

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, ("StorageLvmVg", 'C.stLvmVg) |

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]) |

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$(THH.makeJSONInstance ''StorageType) |

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-- | Node evac modes. |

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$(THH.declareSADT "NodeEvacMode" |

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[ ("NEvacPrimary", 'C.iallocatorNevacPri) |

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, ("NEvacSecondary", 'C.iallocatorNevacSec) |

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, ("NEvacAll", 'C.iallocatorNevacAll) |

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]) |

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$(THH.makeJSONInstance ''NodeEvacMode) |

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-- | The file driver type. |

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$(THH.declareSADT "FileDriver" |

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[ ("FileLoop", 'C.fdLoop) |

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, ("FileBlktap", 'C.fdBlktap) |

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]) |

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$(THH.makeJSONInstance ''FileDriver) |

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-- | The instance create mode. |

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$(THH.declareSADT "InstCreateMode" |

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[ ("InstCreate", 'C.instanceCreate) |

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, ("InstImport", 'C.instanceImport) |

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, ("InstRemoteImport", 'C.instanceRemoteImport) |

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]) |

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$(THH.makeJSONInstance ''InstCreateMode) |

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-- | Reboot type. |

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$(THH.declareSADT "RebootType" |

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[ ("RebootSoft", 'C.instanceRebootSoft) |

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, ("RebootHard", 'C.instanceRebootHard) |

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, ("RebootFull", 'C.instanceRebootFull) |

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]) |

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$(THH.makeJSONInstance ''RebootType) |

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-- | Export modes. |

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$(THH.declareSADT "ExportMode" |

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[ ("ExportModeLocal", 'C.exportModeLocal) |

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, ("ExportModeRemove", 'C.exportModeRemote) |

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]) |

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$(THH.makeJSONInstance ''ExportMode) |

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-- | IAllocator run types (OpTestIAllocator). |

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$(THH.declareSADT "IAllocatorTestDir" |

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[ ("IAllocatorDirIn", 'C.iallocatorDirIn) |

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, ("IAllocatorDirOut", 'C.iallocatorDirOut) |

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]) |

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$(THH.makeJSONInstance ''IAllocatorTestDir) |

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-- | IAllocator mode. FIXME: use this in "HTools.Backend.IAlloc". |

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$(THH.declareSADT "IAllocatorMode" |

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[ ("IAllocatorAlloc", 'C.iallocatorModeAlloc) |

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, ("IAllocatorMultiAlloc", 'C.iallocatorModeMultiAlloc) |

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, ("IAllocatorReloc", 'C.iallocatorModeReloc) |

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, ("IAllocatorNodeEvac", 'C.iallocatorModeNodeEvac) |

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, ("IAllocatorChangeGroup", 'C.iallocatorModeChgGroup) |

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]) |

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$(THH.makeJSONInstance ''IAllocatorMode) |

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-- | Network type. |

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$(THH.declareSADT "NetworkType" |

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[ ("PrivateNetwork", 'C.networkTypePrivate) |

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, ("PublicNetwork", 'C.networkTypePublic) |

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]) |

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$(THH.makeJSONInstance ''NetworkType) |

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-- | Netork mode. |

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$(THH.declareSADT "NICMode" |

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[ ("NMBridged", 'C.nicModeBridged) |

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, ("NMRouted", 'C.nicModeRouted) |

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, ("NMOvs", 'C.nicModeOvs) |

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]) |

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$(THH.makeJSONInstance ''NICMode) |

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-- | The JobStatus data type. Note that this is ordered especially |

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-- such that greater\/lesser comparison on values of this type makes |

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-- sense. |

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$(THH.declareSADT "JobStatus" |

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[ ("JOB_STATUS_QUEUED", 'C.jobStatusQueued) |

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, ("JOB_STATUS_WAITING", 'C.jobStatusWaiting) |

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, ("JOB_STATUS_CANCELING", 'C.jobStatusCanceling) |

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, ("JOB_STATUS_RUNNING", 'C.jobStatusRunning) |

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, ("JOB_STATUS_CANCELED", 'C.jobStatusCanceled) |

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, ("JOB_STATUS_SUCCESS", 'C.jobStatusSuccess) |

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, ("JOB_STATUS_ERROR", 'C.jobStatusError) |

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]) |

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$(THH.makeJSONInstance ''JobStatus) |

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-- | Finalized job status. |

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$(THH.declareSADT "FinalizedJobStatus" |

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[ ("JobStatusCanceled", 'C.jobStatusCanceled) |

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, ("JobStatusSuccessful", 'C.jobStatusSuccess) |

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, ("JobStatusFailed", 'C.jobStatusError) |

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]) |

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$(THH.makeJSONInstance ''FinalizedJobStatus) |

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-- | The Ganeti job type. |

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newtype JobId = JobId { fromJobId :: Int } |

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deriving (Show, Eq) |

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-- | Builds a job ID. |

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makeJobId :: (Monad m) => Int -> m JobId |

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makeJobId i | i >= 0 = return $ JobId i |

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| otherwise = fail $ "Invalid value for job ID ' " ++ show i ++ "'" |

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-- | Builds a job ID from a string. |

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makeJobIdS :: (Monad m) => String -> m JobId |

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makeJobIdS s = tryRead "parsing job id" s >>= makeJobId |

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-- | Parses a job ID. |

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parseJobId :: (Monad m) => JSON.JSValue -> m JobId |

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parseJobId (JSON.JSString x) = makeJobIdS $ JSON.fromJSString x |

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parseJobId (JSON.JSRational _ x) = |

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if denominator x /= 1 |

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then fail $ "Got fractional job ID from master daemon?! Value:" ++ show x |

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-- FIXME: potential integer overflow here on 32-bit platforms |

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else makeJobId . fromIntegral . numerator $ x |

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parseJobId x = fail $ "Wrong type/value for job id: " ++ show x |

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instance JSON.JSON JobId where |

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showJSON = JSON.showJSON . fromJobId |

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readJSON = parseJobId |

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-- | Relative job ID type alias. |

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type RelativeJobId = Negative Int |

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-- | Job ID dependency. |

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data JobIdDep = JobDepRelative RelativeJobId |

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| JobDepAbsolute JobId |

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deriving (Show, Eq) |

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instance JSON.JSON JobIdDep where |

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showJSON (JobDepRelative i) = showJSON i |

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showJSON (JobDepAbsolute i) = showJSON i |

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readJSON v = |

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case JSON.readJSON v::JSON.Result (Negative Int) of |

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-- first try relative dependency, usually most common |

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JSON.Ok r -> return $ JobDepRelative r |

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JSON.Error _ -> liftM JobDepAbsolute (parseJobId v) |

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-- | Job Dependency type. |

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data JobDependency = JobDependency JobIdDep [FinalizedJobStatus] |

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deriving (Show, Eq) |

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instance JSON JobDependency where |

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showJSON (JobDependency dep status) = showJSON (dep, status) |

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readJSON = liftM (uncurry JobDependency) . readJSON |

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-- | Valid opcode priorities for submit. |

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$(THH.declareIADT "OpSubmitPriority" |

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[ ("OpPrioLow", 'C.opPrioLow) |

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, ("OpPrioNormal", 'C.opPrioNormal) |

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, ("OpPrioHigh", 'C.opPrioHigh) |

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]) |

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$(THH.makeJSONInstance ''OpSubmitPriority) |

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-- | Our ADT for the OpCode status at runtime (while in a job). |

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$(THH.declareSADT "OpStatus" |

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[ ("OP_STATUS_QUEUED", 'C.opStatusQueued) |

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, ("OP_STATUS_WAITING", 'C.opStatusWaiting) |

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, ("OP_STATUS_CANCELING", 'C.opStatusCanceling) |

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, ("OP_STATUS_RUNNING", 'C.opStatusRunning) |

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, ("OP_STATUS_CANCELED", 'C.opStatusCanceled) |

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, ("OP_STATUS_SUCCESS", 'C.opStatusSuccess) |

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, ("OP_STATUS_ERROR", 'C.opStatusError) |

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]) |

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$(THH.makeJSONInstance ''OpStatus) |

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-- | Type for the job message type. |

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$(THH.declareSADT "ELogType" |

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[ ("ELogMessage", 'C.elogMessage) |

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, ("ELogRemoteImport", 'C.elogRemoteImport) |

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, ("ELogJqueueTest", 'C.elogJqueueTest) |

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]) |

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$(THH.makeJSONInstance ''ELogType) |