495 lines
15 KiB
Haskell
495 lines
15 KiB
Haskell
{- git-annex command
|
|
-
|
|
- Copyright 2010-2011 Joey Hess <joey@kitenet.net>
|
|
-
|
|
- Licensed under the GNU GPL version 3 or higher.
|
|
-}
|
|
|
|
module Command.Fsck where
|
|
|
|
import Common.Annex
|
|
import Command
|
|
import qualified Annex
|
|
import qualified Remote
|
|
import qualified Types.Backend
|
|
import qualified Types.Key
|
|
import qualified Backend
|
|
import Annex.Content
|
|
import Annex.Content.Direct
|
|
import Annex.Perms
|
|
import Annex.Link
|
|
import Logs.Location
|
|
import Logs.Trust
|
|
import Annex.UUID
|
|
import Utility.DataUnits
|
|
import Utility.FileMode
|
|
import Config
|
|
import qualified Option
|
|
import Types.Key
|
|
import Utility.HumanTime
|
|
|
|
import System.Posix.Process (getProcessID)
|
|
import Data.Time.Clock.POSIX
|
|
import Data.Time
|
|
import System.Posix.Types (EpochTime)
|
|
import System.Locale
|
|
|
|
def :: [Command]
|
|
def = [withOptions options $ command "fsck" paramPaths seek
|
|
SectionMaintenance "check for problems"]
|
|
|
|
fromOption :: Option
|
|
fromOption = Option.field ['f'] "from" paramRemote "check remote"
|
|
|
|
startIncrementalOption :: Option
|
|
startIncrementalOption = Option.flag ['S'] "incremental" "start an incremental fsck"
|
|
|
|
moreIncrementalOption :: Option
|
|
moreIncrementalOption = Option.flag ['m'] "more" "continue an incremental fsck"
|
|
|
|
incrementalScheduleOption :: Option
|
|
incrementalScheduleOption = Option.field [] "incremental-schedule" paramTime
|
|
"schedule incremental fscking"
|
|
|
|
options :: [Option]
|
|
options =
|
|
[ fromOption
|
|
, startIncrementalOption
|
|
, moreIncrementalOption
|
|
, incrementalScheduleOption
|
|
]
|
|
|
|
seek :: [CommandSeek]
|
|
seek =
|
|
[ withField fromOption Remote.byNameWithUUID $ \from ->
|
|
withIncremental $ \i -> withFilesInGit $ whenAnnexed $ start from i
|
|
, withIncremental $ \i -> withBarePresentKeys $ startBare i
|
|
]
|
|
|
|
withIncremental :: (Incremental -> CommandSeek) -> CommandSeek
|
|
withIncremental = withValue $ do
|
|
i <- maybe (return False) (checkschedule . parseDuration)
|
|
=<< Annex.getField (Option.name incrementalScheduleOption)
|
|
starti <- Annex.getFlag (Option.name startIncrementalOption)
|
|
morei <- Annex.getFlag (Option.name moreIncrementalOption)
|
|
case (i, starti, morei) of
|
|
(False, False, False) -> return NonIncremental
|
|
(False, True, _) -> startIncremental
|
|
(False ,False, True) -> ContIncremental <$> getStartTime
|
|
(True, _, _) ->
|
|
maybe startIncremental (return . ContIncremental . Just)
|
|
=<< getStartTime
|
|
where
|
|
startIncremental = do
|
|
recordStartTime
|
|
return StartIncremental
|
|
|
|
checkschedule Nothing = error "bad --incremental-schedule value"
|
|
checkschedule (Just delta) = do
|
|
Annex.addCleanup "" $ do
|
|
v <- getStartTime
|
|
case v of
|
|
Nothing -> noop
|
|
Just started -> do
|
|
now <- liftIO getPOSIXTime
|
|
when (now - realToFrac started >= delta) $
|
|
resetStartTime
|
|
return True
|
|
|
|
start :: Maybe Remote -> Incremental -> FilePath -> (Key, Backend) -> CommandStart
|
|
start from inc file (key, backend) = do
|
|
numcopies <- numCopies file
|
|
case from of
|
|
Nothing -> go $ perform key file backend numcopies
|
|
Just r -> go $ performRemote key file backend numcopies r
|
|
where
|
|
go = runFsck inc file key
|
|
|
|
perform :: Key -> FilePath -> Backend -> Maybe Int -> Annex Bool
|
|
perform key file backend numcopies = check
|
|
-- order matters
|
|
[ fixLink key file
|
|
, verifyLocationLog key file
|
|
, verifyDirectMapping key file
|
|
, checkKeySize key
|
|
, checkBackend backend key
|
|
, checkKeyNumCopies key file numcopies
|
|
]
|
|
|
|
{- To fsck a remote, the content is retrieved to a tmp file,
|
|
- and checked locally. -}
|
|
performRemote :: Key -> FilePath -> Backend -> Maybe Int -> Remote -> Annex Bool
|
|
performRemote key file backend numcopies remote =
|
|
dispatch =<< Remote.hasKey remote key
|
|
where
|
|
dispatch (Left err) = do
|
|
showNote err
|
|
return False
|
|
dispatch (Right True) = withtmp $ \tmpfile ->
|
|
ifM (getfile tmpfile)
|
|
( go True (Just tmpfile)
|
|
, go True Nothing
|
|
)
|
|
dispatch (Right False) = go False Nothing
|
|
go present localcopy = check
|
|
[ verifyLocationLogRemote key file remote present
|
|
, checkKeySizeRemote key remote localcopy
|
|
, checkBackendRemote backend key remote localcopy
|
|
, checkKeyNumCopies key file numcopies
|
|
]
|
|
withtmp a = do
|
|
pid <- liftIO getProcessID
|
|
t <- fromRepo gitAnnexTmpDir
|
|
createAnnexDirectory t
|
|
let tmp = t </> "fsck" ++ show pid ++ "." ++ keyFile key
|
|
let cleanup = liftIO $ catchIO (removeFile tmp) (const noop)
|
|
cleanup
|
|
cleanup `after` a tmp
|
|
getfile tmp =
|
|
ifM (Remote.retrieveKeyFileCheap remote key tmp)
|
|
( return True
|
|
, ifM (Annex.getState Annex.fast)
|
|
( return False
|
|
, Remote.retrieveKeyFile remote key Nothing tmp
|
|
)
|
|
)
|
|
|
|
{- To fsck a bare repository, fsck each key in the location log. -}
|
|
withBarePresentKeys :: (Key -> CommandStart) -> CommandSeek
|
|
withBarePresentKeys a params = isBareRepo >>= go
|
|
where
|
|
go False = return []
|
|
go True = do
|
|
unless (null params) $
|
|
error "fsck should be run without parameters in a bare repository"
|
|
map a <$> loggedKeys
|
|
|
|
startBare :: Incremental -> Key -> CommandStart
|
|
startBare inc key = case Backend.maybeLookupBackendName (Types.Key.keyBackendName key) of
|
|
Nothing -> stop
|
|
Just backend -> runFsck inc (key2file key) key $ performBare key backend
|
|
|
|
{- Note that numcopies cannot be checked in a bare repository, because
|
|
- getting the numcopies value requires a working copy with .gitattributes
|
|
- files. -}
|
|
performBare :: Key -> Backend -> Annex Bool
|
|
performBare key backend = check
|
|
[ verifyLocationLog key (key2file key)
|
|
, checkKeySize key
|
|
, checkBackend backend key
|
|
]
|
|
|
|
check :: [Annex Bool] -> Annex Bool
|
|
check cs = all id <$> sequence cs
|
|
|
|
{- Checks that the file's link points correctly to the content.
|
|
-
|
|
- In direct mode, there is only a link when the content is not present.
|
|
-}
|
|
fixLink :: Key -> FilePath -> Annex Bool
|
|
fixLink key file = do
|
|
want <- calcGitLink file key
|
|
have <- getAnnexLinkTarget file
|
|
maybe noop (go want) have
|
|
return True
|
|
where
|
|
go want have = when (want /= have) $ do
|
|
{- Version 3.20120227 had a bug that could cause content
|
|
- to be stored in the wrong hash directory. Clean up
|
|
- after the bug by moving the content.
|
|
-}
|
|
whenM (liftIO $ doesFileExist file) $
|
|
unlessM (inAnnex key) $ do
|
|
showNote "fixing content location"
|
|
dir <- liftIO $ parentDir <$> absPath file
|
|
let content = absPathFrom dir have
|
|
unlessM crippledFileSystem $
|
|
liftIO $ allowWrite (parentDir content)
|
|
moveAnnex key content
|
|
|
|
showNote "fixing link"
|
|
liftIO $ createDirectoryIfMissing True (parentDir file)
|
|
liftIO $ removeFile file
|
|
addAnnexLink want file
|
|
|
|
{- Checks that the location log reflects the current status of the key,
|
|
- in this repository only. -}
|
|
verifyLocationLog :: Key -> String -> Annex Bool
|
|
verifyLocationLog key desc = do
|
|
present <- inAnnex key
|
|
direct <- isDirect
|
|
u <- getUUID
|
|
|
|
{- Since we're checking that a key's file is present, throw
|
|
- in a permission fixup here too. -}
|
|
when (present && not direct) $ do
|
|
file <- inRepo $ gitAnnexLocation key
|
|
freezeContent file
|
|
freezeContentDir file
|
|
|
|
{- In direct mode, modified files will show up as not present,
|
|
- but that is expected and not something to do anything about. -}
|
|
if (direct && not present)
|
|
then return True
|
|
else verifyLocationLog' key desc present u (logChange key u)
|
|
|
|
verifyLocationLogRemote :: Key -> String -> Remote -> Bool -> Annex Bool
|
|
verifyLocationLogRemote key desc remote present =
|
|
verifyLocationLog' key desc present (Remote.uuid remote)
|
|
(Remote.logStatus remote key)
|
|
|
|
verifyLocationLog' :: Key -> String -> Bool -> UUID -> (LogStatus -> Annex ()) -> Annex Bool
|
|
verifyLocationLog' key desc present u bad = do
|
|
uuids <- Remote.keyLocations key
|
|
case (present, u `elem` uuids) of
|
|
(True, False) -> do
|
|
fix InfoPresent
|
|
-- There is no data loss, so do not fail.
|
|
return True
|
|
(False, True) -> do
|
|
fix InfoMissing
|
|
warning $
|
|
"** Based on the location log, " ++ desc
|
|
++ "\n** was expected to be present, " ++
|
|
"but its content is missing."
|
|
return False
|
|
_ -> return True
|
|
where
|
|
fix s = do
|
|
showNote "fixing location log"
|
|
bad s
|
|
|
|
{- Ensures the direct mode mapping file is consistent. Each file
|
|
- it lists for the key should exist, and the specified file should be
|
|
- included in it.
|
|
-}
|
|
verifyDirectMapping :: Key -> FilePath -> Annex Bool
|
|
verifyDirectMapping key file = do
|
|
whenM isDirect $ do
|
|
fs <- addAssociatedFile key file
|
|
forM_ fs $ \f ->
|
|
unlessM (liftIO $ doesFileExist f) $
|
|
void $ removeAssociatedFile key f
|
|
return True
|
|
|
|
{- The size of the data for a key is checked against the size encoded in
|
|
- the key's metadata, if available.
|
|
-
|
|
- Not checked in direct mode, because files can be changed directly.
|
|
-}
|
|
checkKeySize :: Key -> Annex Bool
|
|
checkKeySize key = ifM isDirect
|
|
( return True
|
|
, do
|
|
file <- inRepo $ gitAnnexLocation key
|
|
ifM (liftIO $ doesFileExist file)
|
|
( checkKeySizeOr badContent key file
|
|
, return True
|
|
)
|
|
)
|
|
|
|
checkKeySizeRemote :: Key -> Remote -> Maybe FilePath -> Annex Bool
|
|
checkKeySizeRemote _ _ Nothing = return True
|
|
checkKeySizeRemote key remote (Just file) =
|
|
checkKeySizeOr (badContentRemote remote) key file
|
|
|
|
checkKeySizeOr :: (Key -> Annex String) -> Key -> FilePath -> Annex Bool
|
|
checkKeySizeOr bad key file = case Types.Key.keySize key of
|
|
Nothing -> return True
|
|
Just size -> do
|
|
size' <- fromIntegral . fileSize
|
|
<$> liftIO (getFileStatus file)
|
|
comparesizes size size'
|
|
where
|
|
comparesizes a b = do
|
|
let same = a == b
|
|
unless same $ badsize a b
|
|
return same
|
|
badsize a b = do
|
|
msg <- bad key
|
|
warning $ concat
|
|
[ "Bad file size ("
|
|
, compareSizes storageUnits True a b
|
|
, "); "
|
|
, msg
|
|
]
|
|
|
|
{- Runs the backend specific check on a key's content.
|
|
-
|
|
- In direct mode this is not done if the file has clearly been modified,
|
|
- because modification of direct mode files is allowed. It's still done
|
|
- if the file does not appear modified, to catch disk corruption, etc.
|
|
-}
|
|
checkBackend :: Backend -> Key -> Annex Bool
|
|
checkBackend backend key = do
|
|
file <- inRepo $ gitAnnexLocation key
|
|
ifM isDirect
|
|
( ifM (goodContent key file)
|
|
( checkBackendOr' (badContentDirect file) backend key file
|
|
(goodContent key file)
|
|
, return True
|
|
)
|
|
, checkBackendOr badContent backend key file
|
|
)
|
|
|
|
checkBackendRemote :: Backend -> Key -> Remote -> Maybe FilePath -> Annex Bool
|
|
checkBackendRemote backend key remote = maybe (return True) go
|
|
where
|
|
go file = checkBackendOr (badContentRemote remote) backend key file
|
|
|
|
checkBackendOr :: (Key -> Annex String) -> Backend -> Key -> FilePath -> Annex Bool
|
|
checkBackendOr bad backend key file =
|
|
checkBackendOr' bad backend key file (return True)
|
|
|
|
checkBackendOr' :: (Key -> Annex String) -> Backend -> Key -> FilePath -> Annex Bool -> Annex Bool
|
|
checkBackendOr' bad backend key file postcheck =
|
|
case Types.Backend.fsckKey backend of
|
|
Nothing -> return True
|
|
Just a -> do
|
|
ok <- a key file
|
|
ifM postcheck
|
|
( do
|
|
unless ok $ do
|
|
msg <- bad key
|
|
warning $ "Bad file content; " ++ msg
|
|
return ok
|
|
, return True
|
|
)
|
|
|
|
checkKeyNumCopies :: Key -> FilePath -> Maybe Int -> Annex Bool
|
|
checkKeyNumCopies key file numcopies = do
|
|
needed <- getNumCopies numcopies
|
|
(untrustedlocations, safelocations) <- trustPartition UnTrusted =<< Remote.keyLocations key
|
|
let present = length safelocations
|
|
if present < needed
|
|
then do
|
|
ppuuids <- Remote.prettyPrintUUIDs "untrusted" untrustedlocations
|
|
warning $ missingNote file present needed ppuuids
|
|
return False
|
|
else return True
|
|
|
|
missingNote :: String -> Int -> Int -> String -> String
|
|
missingNote file 0 _ [] =
|
|
"** No known copies exist of " ++ file
|
|
missingNote file 0 _ untrusted =
|
|
"Only these untrusted locations may have copies of " ++ file ++
|
|
"\n" ++ untrusted ++
|
|
"Back it up to trusted locations with git-annex copy."
|
|
missingNote file present needed [] =
|
|
"Only " ++ show present ++ " of " ++ show needed ++
|
|
" trustworthy copies exist of " ++ file ++
|
|
"\nBack it up with git-annex copy."
|
|
missingNote file present needed untrusted =
|
|
missingNote file present needed [] ++
|
|
"\nThe following untrusted locations may also have copies: " ++
|
|
"\n" ++ untrusted
|
|
|
|
{- Bad content is moved aside. -}
|
|
badContent :: Key -> Annex String
|
|
badContent key = do
|
|
dest <- moveBad key
|
|
return $ "moved to " ++ dest
|
|
|
|
{- Bad content is left where it is, but we touch the file, so it'll be
|
|
- committed to a new key. -}
|
|
badContentDirect :: FilePath -> Key -> Annex String
|
|
badContentDirect file key = do
|
|
void $ liftIO $ catchMaybeIO $ touchFile file
|
|
logStatus key InfoMissing
|
|
return $ "left in place for you to examine"
|
|
|
|
badContentRemote :: Remote -> Key -> Annex String
|
|
badContentRemote remote key = do
|
|
ok <- Remote.removeKey remote key
|
|
when ok $
|
|
Remote.logStatus remote key InfoMissing
|
|
return $ (if ok then "dropped from " else "failed to drop from ")
|
|
++ Remote.name remote
|
|
|
|
data Incremental = StartIncremental | ContIncremental (Maybe EpochTime) | NonIncremental
|
|
deriving (Eq)
|
|
|
|
runFsck :: Incremental -> FilePath -> Key -> Annex Bool -> CommandStart
|
|
runFsck inc file key a = ifM (needFsck inc key)
|
|
( do
|
|
showStart "fsck" file
|
|
next $ do
|
|
ok <- a
|
|
when ok $
|
|
recordFsckTime key
|
|
next $ return ok
|
|
, stop
|
|
)
|
|
|
|
{- Check if a key needs to be fscked, with support for incremental fscks. -}
|
|
needFsck :: Incremental -> Key -> Annex Bool
|
|
needFsck (ContIncremental Nothing) _ = return True
|
|
needFsck (ContIncremental starttime) key = do
|
|
fscktime <- getFsckTime key
|
|
return $ fscktime < starttime
|
|
needFsck _ _ = return True
|
|
|
|
{- To record the time that a key was last fscked, without
|
|
- modifying its mtime, we set the timestamp of its parent directory.
|
|
- Each annexed file is the only thing in its directory, so this is fine.
|
|
-
|
|
- To record that the file was fscked, the directory's sticky bit is set.
|
|
- (None of the normal unix behaviors of the sticky bit should matter, so
|
|
- we can reuse this permission bit.)
|
|
-
|
|
- Note that this relies on the parent directory being deleted when a file
|
|
- is dropped. That way, if it's later added back, the fsck record
|
|
- won't still be present.
|
|
-}
|
|
recordFsckTime :: Key -> Annex ()
|
|
recordFsckTime key = do
|
|
parent <- parentDir <$> inRepo (gitAnnexLocation key)
|
|
liftIO $ void $ tryIO $ do
|
|
touchFile parent
|
|
setSticky parent
|
|
|
|
getFsckTime :: Key -> Annex (Maybe EpochTime)
|
|
getFsckTime key = do
|
|
parent <- parentDir <$> inRepo (gitAnnexLocation key)
|
|
liftIO $ catchDefaultIO Nothing $ do
|
|
s <- getFileStatus parent
|
|
return $ if isSticky $ fileMode s
|
|
then Just $ modificationTime s
|
|
else Nothing
|
|
|
|
{- Records the start time of an interactive fsck.
|
|
-
|
|
- To guard against time stamp damange (for example, if an annex directory
|
|
- is copied without -a), the fsckstate file contains a time that should
|
|
- be identical to its modification time. -}
|
|
recordStartTime :: Annex ()
|
|
recordStartTime = do
|
|
f <- fromRepo gitAnnexFsckState
|
|
createAnnexDirectory $ parentDir f
|
|
liftIO $ do
|
|
nukeFile f
|
|
h <- openFile f WriteMode
|
|
t <- modificationTime <$> getFileStatus f
|
|
hPutStr h $ showTime $ realToFrac t
|
|
hClose h
|
|
where
|
|
showTime :: POSIXTime -> String
|
|
showTime = show
|
|
|
|
resetStartTime :: Annex ()
|
|
resetStartTime = liftIO . nukeFile =<< fromRepo gitAnnexFsckState
|
|
|
|
{- Gets the incremental fsck start time. -}
|
|
getStartTime :: Annex (Maybe EpochTime)
|
|
getStartTime = do
|
|
f <- fromRepo gitAnnexFsckState
|
|
liftIO $ catchDefaultIO Nothing $ do
|
|
timestamp <- modificationTime <$> getFileStatus f
|
|
t <- readishTime <$> readFile f
|
|
return $ if Just (realToFrac timestamp) == t
|
|
then Just timestamp
|
|
else Nothing
|
|
where
|
|
readishTime :: String -> Maybe POSIXTime
|
|
readishTime s = utcTimeToPOSIXSeconds <$>
|
|
parseTime defaultTimeLocale "%s%Qs" s
|