{-# LANGUAGE DataKinds #-}
module TahoeLAFS.Storage.Backend (
Backend (..),
WriteImmutableError (..),
writeMutableShare,
withUploadSecret,
) where
import Control.Exception (
Exception,
throw,
throwIO,
)
import Data.Map.Strict (
fromList,
)
import Network.HTTP.Types (
ByteRanges,
)
import TahoeLAFS.Storage.API (
AllocateBuckets,
AllocationResult,
CBORSet (..),
CorruptionDetails,
LeaseSecret (..),
QueryRange,
ReadTestWriteResult (..),
ReadTestWriteVectors (..),
ShareData,
ShareNumber,
StorageIndex,
TestWriteVectors (..),
UploadSecret (..),
Version,
WriteEnablerSecret,
WriteVector (..),
isUploadSecret,
)
data WriteImmutableError
= MissingUploadSecret
| ShareSizeMismatch
| ImmutableShareAlreadyWritten
| ShareNotAllocated
| IncorrectUploadSecret
| IncorrectWriteEnablerSecret
deriving (Eq WriteImmutableError
Eq WriteImmutableError
-> (WriteImmutableError -> WriteImmutableError -> Ordering)
-> (WriteImmutableError -> WriteImmutableError -> Bool)
-> (WriteImmutableError -> WriteImmutableError -> Bool)
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-> WriteImmutableError -> WriteImmutableError)
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-> Ord WriteImmutableError
WriteImmutableError -> WriteImmutableError -> Bool
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WriteImmutableError -> WriteImmutableError -> WriteImmutableError
forall a.
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min :: WriteImmutableError -> WriteImmutableError -> WriteImmutableError
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Eq, Int -> WriteImmutableError -> ShowS
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WriteImmutableError -> String
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-> Show WriteImmutableError
forall a.
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show :: WriteImmutableError -> String
$cshow :: WriteImmutableError -> String
showsPrec :: Int -> WriteImmutableError -> ShowS
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Show)
instance Exception WriteImmutableError
class Backend b where
version :: b -> IO Version
renewLease :: b -> StorageIndex -> [LeaseSecret] -> IO ()
createImmutableStorageIndex :: b -> StorageIndex -> Maybe [LeaseSecret] -> AllocateBuckets -> IO AllocationResult
writeImmutableShare :: b -> StorageIndex -> ShareNumber -> Maybe [LeaseSecret] -> ShareData -> Maybe ByteRanges -> IO ()
abortImmutableUpload :: b -> StorageIndex -> ShareNumber -> Maybe [LeaseSecret] -> IO ()
adviseCorruptImmutableShare :: b -> StorageIndex -> ShareNumber -> CorruptionDetails -> IO ()
getImmutableShareNumbers :: b -> StorageIndex -> IO (CBORSet ShareNumber)
readImmutableShare :: b -> StorageIndex -> ShareNumber -> QueryRange -> IO ShareData
readvAndTestvAndWritev ::
b ->
StorageIndex ->
WriteEnablerSecret ->
ReadTestWriteVectors ->
IO ReadTestWriteResult
readMutableShare :: b -> StorageIndex -> ShareNumber -> QueryRange -> IO ShareData
getMutableShareNumbers :: b -> StorageIndex -> IO (CBORSet ShareNumber)
adviseCorruptMutableShare :: b -> StorageIndex -> ShareNumber -> CorruptionDetails -> IO ()
writeMutableShare ::
Backend b =>
b ->
StorageIndex ->
ShareNumber ->
WriteEnablerSecret ->
ShareData ->
Maybe ByteRanges ->
IO ()
writeMutableShare :: b
-> String
-> ShareNumber
-> WriteEnablerSecret
-> ShareData
-> Maybe ByteRanges
-> IO ()
writeMutableShare b
b String
storageIndex ShareNumber
shareNumber WriteEnablerSecret
writeEnablerSecret ShareData
shareData Maybe ByteRanges
Nothing = do
let testWriteVectors :: Map ShareNumber TestWriteVectors
testWriteVectors =
[(ShareNumber, TestWriteVectors)]
-> Map ShareNumber TestWriteVectors
forall k a. Ord k => [(k, a)] -> Map k a
fromList
[
( ShareNumber
shareNumber
, TestWriteVectors :: [TestVector] -> [WriteVector] -> Maybe Integer -> TestWriteVectors
TestWriteVectors
{ test :: [TestVector]
test = []
, write :: [WriteVector]
write =
[ WriteVector :: Integer -> ShareData -> WriteVector
WriteVector
{ writeOffset :: Integer
writeOffset = Integer
0
, shareData :: ShareData
shareData = ShareData
shareData
}
]
, newLength :: Maybe Integer
newLength = Maybe Integer
forall a. Maybe a
Nothing
}
)
]
let vectors :: ReadTestWriteVectors
vectors =
ReadTestWriteVectors :: Map ShareNumber TestWriteVectors
-> [ReadVector] -> ReadTestWriteVectors
ReadTestWriteVectors
{ testWriteVectors :: Map ShareNumber TestWriteVectors
testWriteVectors = Map ShareNumber TestWriteVectors
testWriteVectors
, readVector :: [ReadVector]
readVector = [ReadVector]
forall a. Monoid a => a
mempty
}
ReadTestWriteResult
result <- b
-> String
-> WriteEnablerSecret
-> ReadTestWriteVectors
-> IO ReadTestWriteResult
forall b.
Backend b =>
b
-> String
-> WriteEnablerSecret
-> ReadTestWriteVectors
-> IO ReadTestWriteResult
readvAndTestvAndWritev b
b String
storageIndex WriteEnablerSecret
writeEnablerSecret ReadTestWriteVectors
vectors
if ReadTestWriteResult -> Bool
success ReadTestWriteResult
result
then () -> IO ()
forall (m :: * -> *) a. Monad m => a -> m a
return ()
else WriteRefused -> IO ()
forall a e. Exception e => e -> a
throw WriteRefused
WriteRefused
writeMutableShare b
_ String
_ ShareNumber
_ WriteEnablerSecret
_ ShareData
_ Maybe ByteRanges
_ = String -> IO ()
forall a. HasCallStack => String -> a
error String
"writeMutableShare got bad input"
data WriteRefused = WriteRefused deriving (Int -> WriteRefused -> ShowS
[WriteRefused] -> ShowS
WriteRefused -> String
(Int -> WriteRefused -> ShowS)
-> (WriteRefused -> String)
-> ([WriteRefused] -> ShowS)
-> Show WriteRefused
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showList :: [WriteRefused] -> ShowS
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showsPrec :: Int -> WriteRefused -> ShowS
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-> (WriteRefused -> WriteRefused -> Bool) -> Eq WriteRefused
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/= :: WriteRefused -> WriteRefused -> Bool
$c/= :: WriteRefused -> WriteRefused -> Bool
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Eq)
instance Exception WriteRefused
withUploadSecret :: Maybe [LeaseSecret] -> (UploadSecret -> IO a) -> IO a
withUploadSecret :: Maybe [LeaseSecret] -> (UploadSecret -> IO a) -> IO a
withUploadSecret Maybe [LeaseSecret]
ss UploadSecret -> IO a
f =
case (LeaseSecret -> Bool) -> [LeaseSecret] -> [LeaseSecret]
forall a. (a -> Bool) -> [a] -> [a]
filter LeaseSecret -> Bool
isUploadSecret ([LeaseSecret] -> [LeaseSecret])
-> Maybe [LeaseSecret] -> Maybe [LeaseSecret]
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> Maybe [LeaseSecret]
ss of
Just [Upload UploadSecret
s] -> UploadSecret -> IO a
f UploadSecret
s
Maybe [LeaseSecret]
_ -> WriteImmutableError -> IO a
forall e a. Exception e => e -> IO a
throwIO WriteImmutableError
MissingUploadSecret