464 lines
14 KiB
Nim
464 lines
14 KiB
Nim
## Nim-Codex
|
|
## Copyright (c) 2022 Status Research & Development GmbH
|
|
## Licensed under either of
|
|
## * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
|
|
## * MIT license ([LICENSE-MIT](LICENSE-MIT))
|
|
## at your option.
|
|
## This file may not be copied, modified, or distributed except according to
|
|
## those terms.
|
|
|
|
import pkg/upraises
|
|
|
|
push: {.upraises: [].}
|
|
|
|
import pkg/chronos
|
|
import pkg/chronicles
|
|
import pkg/libp2p/cid
|
|
import pkg/metrics
|
|
import pkg/questionable
|
|
import pkg/questionable/results
|
|
import pkg/datastore
|
|
import pkg/stew/endians2
|
|
|
|
import ./blockstore
|
|
import ./keyutils
|
|
import ../blocktype
|
|
import ../clock
|
|
import ../systemclock
|
|
|
|
export blocktype, cid
|
|
|
|
logScope:
|
|
topics = "codex repostore"
|
|
|
|
declareGauge(codexRepostoreBlocks, "codex repostore blocks")
|
|
declareGauge(codexRepostoreBytesUsed, "codex repostore bytes used")
|
|
declareGauge(codexRepostoreBytesReserved, "codex repostore bytes reserved")
|
|
|
|
const
|
|
DefaultBlockTtl* = 24.hours
|
|
DefaultQuotaBytes* = 1'u shl 33'u # ~8GB
|
|
|
|
type
|
|
QuotaUsedError* = object of CodexError
|
|
QuotaNotEnoughError* = object of CodexError
|
|
|
|
RepoStore* = ref object of BlockStore
|
|
postFixLen*: int
|
|
repoDs*: Datastore
|
|
metaDs*: Datastore
|
|
clock: Clock
|
|
totalBlocks*: uint # number of blocks in the store
|
|
quotaMaxBytes*: uint # maximum available bytes
|
|
quotaUsedBytes*: uint # bytes used by the repo
|
|
quotaReservedBytes*: uint # bytes reserved by the repo
|
|
blockTtl*: Duration
|
|
started*: bool
|
|
|
|
BlockExpiration* = object
|
|
cid*: Cid
|
|
expiration*: SecondsSince1970
|
|
GetNext = proc(): Future[?BlockExpiration] {.upraises: [], gcsafe, closure.}
|
|
BlockExpirationIter* = ref object
|
|
finished*: bool
|
|
next*: GetNext
|
|
|
|
iterator items*(q: BlockExpirationIter): Future[?BlockExpiration] =
|
|
while not q.finished:
|
|
yield q.next()
|
|
|
|
proc updateMetrics(self: RepoStore) =
|
|
codexRepostoreBlocks.set(self.totalBlocks.int64)
|
|
codexRepostoreBytesUsed.set(self.quotaUsedBytes.int64)
|
|
codexRepostoreBytesReserved.set(self.quotaReservedBytes.int64)
|
|
|
|
func totalUsed*(self: RepoStore): uint =
|
|
(self.quotaUsedBytes + self.quotaReservedBytes)
|
|
|
|
func available*(self: RepoStore): uint =
|
|
return self.quotaMaxBytes - self.totalUsed
|
|
|
|
func available*(self: RepoStore, bytes: uint): bool =
|
|
return bytes < self.available()
|
|
|
|
method getBlock*(self: RepoStore, cid: Cid): Future[?!Block] {.async.} =
|
|
## Get a block from the blockstore
|
|
##
|
|
|
|
without key =? makePrefixKey(self.postFixLen, cid), err:
|
|
trace "Error getting key from provider", err = err.msg
|
|
return failure(err)
|
|
|
|
without data =? await self.repoDs.get(key), err:
|
|
if not (err of DatastoreKeyNotFound):
|
|
trace "Error getting block from datastore", err = err.msg, key
|
|
return failure(err)
|
|
|
|
return failure(newException(BlockNotFoundError, err.msg))
|
|
|
|
trace "Got block for cid", cid
|
|
return Block.new(cid, data)
|
|
|
|
proc getBlockExpirationTimestamp(self: RepoStore, ttl: ?Duration): SecondsSince1970 =
|
|
let duration = ttl |? self.blockTtl
|
|
self.clock.now() + duration.seconds
|
|
|
|
proc getBlockExpirationEntry(
|
|
self: RepoStore,
|
|
batch: var seq[BatchEntry],
|
|
cid: Cid,
|
|
ttl: ?Duration
|
|
): ?!BatchEntry =
|
|
## Get an expiration entry for a batch
|
|
without key =? createBlockExpirationMetadataKey(cid), err:
|
|
return failure(err)
|
|
|
|
let value = self.getBlockExpirationTimestamp(ttl).toBytes
|
|
return success((key, value))
|
|
|
|
proc persistTotalBlocksCount(self: RepoStore): Future[?!void] {.async.} =
|
|
if err =? (await self.metaDs.put(
|
|
CodexTotalBlocksKey,
|
|
@(self.totalBlocks.uint64.toBytesBE))).errorOption:
|
|
trace "Error total blocks key!", err = err.msg
|
|
return failure(err)
|
|
return success()
|
|
|
|
method putBlock*(
|
|
self: RepoStore,
|
|
blk: Block,
|
|
ttl = Duration.none
|
|
): Future[?!void] {.async.} =
|
|
## Put a block to the blockstore
|
|
##
|
|
|
|
without key =? makePrefixKey(self.postFixLen, blk.cid), err:
|
|
trace "Error getting key from provider", err = err.msg
|
|
return failure(err)
|
|
|
|
if await key in self.repoDs:
|
|
trace "Block already in store", cid = blk.cid
|
|
return success()
|
|
|
|
if (self.totalUsed + blk.data.len.uint) > self.quotaMaxBytes:
|
|
error "Cannot store block, quota used!", used = self.totalUsed
|
|
return failure(
|
|
newException(QuotaUsedError, "Cannot store block, quota used!"))
|
|
|
|
trace "Storing block with key", key
|
|
|
|
var
|
|
batch: seq[BatchEntry]
|
|
|
|
let
|
|
used = self.quotaUsedBytes + blk.data.len.uint
|
|
|
|
if err =? (await self.repoDs.put(key, blk.data)).errorOption:
|
|
trace "Error storing block", err = err.msg
|
|
return failure(err)
|
|
|
|
trace "Updating quota", used
|
|
batch.add((QuotaUsedKey, @(used.uint64.toBytesBE)))
|
|
|
|
without blockExpEntry =? self.getBlockExpirationEntry(batch, blk.cid, ttl), err:
|
|
trace "Unable to create block expiration metadata key", err = err.msg
|
|
return failure(err)
|
|
batch.add(blockExpEntry)
|
|
|
|
if err =? (await self.metaDs.put(batch)).errorOption:
|
|
trace "Error updating quota bytes", err = err.msg
|
|
|
|
if err =? (await self.repoDs.delete(key)).errorOption:
|
|
trace "Error deleting block after failed quota update", err = err.msg
|
|
return failure(err)
|
|
|
|
return failure(err)
|
|
|
|
self.quotaUsedBytes = used
|
|
inc self.totalBlocks
|
|
if isErr (await self.persistTotalBlocksCount()):
|
|
trace "Unable to update block total metadata"
|
|
return failure("Unable to update block total metadata")
|
|
|
|
self.updateMetrics()
|
|
return success()
|
|
|
|
proc updateQuotaBytesUsed(self: RepoStore, blk: Block): Future[?!void] {.async.} =
|
|
let used = self.quotaUsedBytes - blk.data.len.uint
|
|
if err =? (await self.metaDs.put(
|
|
QuotaUsedKey,
|
|
@(used.uint64.toBytesBE))).errorOption:
|
|
trace "Error updating quota key!", err = err.msg
|
|
return failure(err)
|
|
self.quotaUsedBytes = used
|
|
self.updateMetrics()
|
|
return success()
|
|
|
|
proc removeBlockExpirationEntry(self: RepoStore, cid: Cid): Future[?!void] {.async.} =
|
|
without key =? createBlockExpirationMetadataKey(cid), err:
|
|
return failure(err)
|
|
return await self.metaDs.delete(key)
|
|
|
|
method delBlock*(self: RepoStore, cid: Cid): Future[?!void] {.async.} =
|
|
## Delete a block from the blockstore
|
|
##
|
|
|
|
trace "Deleting block", cid
|
|
|
|
if blk =? (await self.getBlock(cid)):
|
|
if key =? makePrefixKey(self.postFixLen, cid) and
|
|
err =? (await self.repoDs.delete(key)).errorOption:
|
|
trace "Error deleting block!", err = err.msg
|
|
return failure(err)
|
|
|
|
if isErr (await self.updateQuotaBytesUsed(blk)):
|
|
trace "Unable to update quote-bytes-used in metadata store"
|
|
return failure("Unable to update quote-bytes-used in metadata store")
|
|
|
|
if isErr (await self.removeBlockExpirationEntry(blk.cid)):
|
|
trace "Unable to remove block expiration entry from metadata store"
|
|
return failure("Unable to remove block expiration entry from metadata store")
|
|
|
|
trace "Deleted block", cid, totalUsed = self.totalUsed
|
|
|
|
dec self.totalBlocks
|
|
if isErr (await self.persistTotalBlocksCount()):
|
|
trace "Unable to update block total metadata"
|
|
return failure("Unable to update block total metadata")
|
|
|
|
self.updateMetrics()
|
|
return success()
|
|
|
|
method hasBlock*(self: RepoStore, cid: Cid): Future[?!bool] {.async.} =
|
|
## Check if the block exists in the blockstore
|
|
##
|
|
|
|
without key =? makePrefixKey(self.postFixLen, cid), err:
|
|
trace "Error getting key from provider", err = err.msg
|
|
return failure(err)
|
|
|
|
return await self.repoDs.has(key)
|
|
|
|
method listBlocks*(
|
|
self: RepoStore,
|
|
blockType = BlockType.Manifest
|
|
): Future[?!BlocksIter] {.async.} =
|
|
## Get the list of blocks in the RepoStore.
|
|
## This is an intensive operation
|
|
##
|
|
|
|
var
|
|
iter = BlocksIter()
|
|
|
|
let key =
|
|
case blockType:
|
|
of BlockType.Manifest: CodexManifestKey
|
|
of BlockType.Block: CodexBlocksKey
|
|
of BlockType.Both: CodexRepoKey
|
|
|
|
without queryIter =? (await self.repoDs.query(Query.init(key))), err:
|
|
trace "Error querying cids in repo", blockType, err = err.msg
|
|
return failure(err)
|
|
|
|
proc next(): Future[?Cid] {.async.} =
|
|
await idleAsync()
|
|
iter.finished = queryIter.finished
|
|
if not queryIter.finished:
|
|
if pair =? (await queryIter.next()) and cid =? pair.key:
|
|
trace "Retrieved record from repo", cid
|
|
return Cid.init(cid.value).option
|
|
|
|
return Cid.none
|
|
|
|
iter.next = next
|
|
return success iter
|
|
|
|
proc createBlockExpirationQuery(maxNumber: int, offset: int): ?!Query =
|
|
let queryKey = ? createBlockExpirationMetadataQueryKey()
|
|
success Query.init(queryKey, offset = offset, limit = maxNumber)
|
|
|
|
method getBlockExpirations*(
|
|
self: RepoStore,
|
|
maxNumber: int,
|
|
offset: int
|
|
): Future[?!BlockExpirationIter] {.async, base.} =
|
|
## Get block experiartions from the given RepoStore
|
|
##
|
|
without query =? createBlockExpirationQuery(maxNumber, offset), err:
|
|
trace "Unable to format block expirations query"
|
|
return failure(err)
|
|
|
|
without queryIter =? (await self.metaDs.query(query)), err:
|
|
trace "Unable to execute block expirations query"
|
|
return failure(err)
|
|
|
|
var iter = BlockExpirationIter()
|
|
|
|
proc next(): Future[?BlockExpiration] {.async.} =
|
|
if not queryIter.finished:
|
|
if pair =? (await queryIter.next()) and blockKey =? pair.key:
|
|
let expirationTimestamp = pair.data
|
|
let cidResult = Cid.init(blockKey.value)
|
|
if not cidResult.isOk:
|
|
raiseAssert("Unable to parse CID from blockKey.value: " & blockKey.value & $cidResult.error)
|
|
return BlockExpiration(
|
|
cid: cidResult.get,
|
|
expiration: expirationTimestamp.toSecondsSince1970
|
|
).some
|
|
else:
|
|
discard await queryIter.dispose()
|
|
iter.finished = true
|
|
return BlockExpiration.none
|
|
|
|
iter.next = next
|
|
return success iter
|
|
|
|
method close*(self: RepoStore): Future[void] {.async.} =
|
|
## Close the blockstore, cleaning up resources managed by it.
|
|
## For some implementations this may be a no-op
|
|
##
|
|
|
|
(await self.repoDs.close()).expect("Should close datastore")
|
|
|
|
proc hasBlock*(self: RepoStore, cid: Cid): Future[?!bool] {.async.} =
|
|
## Check if the block exists in the blockstore.
|
|
## Return false if error encountered
|
|
##
|
|
|
|
without key =? makePrefixKey(self.postFixLen, cid), err:
|
|
trace "Error getting key from provider", err = err.msg
|
|
return failure(err.msg)
|
|
|
|
return await self.repoDs.has(key)
|
|
|
|
proc reserve*(self: RepoStore, bytes: uint): Future[?!void] {.async.} =
|
|
## Reserve bytes
|
|
##
|
|
|
|
trace "Reserving bytes", reserved = self.quotaReservedBytes, bytes
|
|
|
|
if (self.totalUsed + bytes) > self.quotaMaxBytes:
|
|
trace "Not enough storage quota to reserver", reserve = self.totalUsed + bytes
|
|
return failure(
|
|
newException(QuotaNotEnoughError, "Not enough storage quota to reserver"))
|
|
|
|
self.quotaReservedBytes += bytes
|
|
if err =? (await self.metaDs.put(
|
|
QuotaReservedKey,
|
|
@(toBytesBE(self.quotaReservedBytes.uint64)))).errorOption:
|
|
|
|
trace "Error reserving bytes", err = err.msg
|
|
|
|
self.quotaReservedBytes += bytes
|
|
return failure(err)
|
|
|
|
return success()
|
|
|
|
proc release*(self: RepoStore, bytes: uint): Future[?!void] {.async.} =
|
|
## Release bytes
|
|
##
|
|
|
|
trace "Releasing bytes", reserved = self.quotaReservedBytes, bytes
|
|
|
|
if (self.quotaReservedBytes.int - bytes.int) < 0:
|
|
trace "Cannot release this many bytes",
|
|
quotaReservedBytes = self.quotaReservedBytes, bytes
|
|
|
|
return failure("Cannot release this many bytes")
|
|
|
|
self.quotaReservedBytes -= bytes
|
|
if err =? (await self.metaDs.put(
|
|
QuotaReservedKey,
|
|
@(toBytesBE(self.quotaReservedBytes.uint64)))).errorOption:
|
|
|
|
trace "Error releasing bytes", err = err.msg
|
|
|
|
self.quotaReservedBytes -= bytes
|
|
|
|
return failure(err)
|
|
|
|
trace "Released bytes", bytes
|
|
self.updateMetrics()
|
|
return success()
|
|
|
|
proc start*(self: RepoStore): Future[void] {.async.} =
|
|
## Start repo
|
|
##
|
|
|
|
if self.started:
|
|
trace "Repo already started"
|
|
return
|
|
|
|
trace "Starting repo"
|
|
|
|
without total =? await self.metaDs.get(CodexTotalBlocksKey), err:
|
|
if not (err of DatastoreKeyNotFound):
|
|
error "Unable to read total number of blocks from metadata store", err = err.msg, key = $CodexTotalBlocksKey
|
|
|
|
if total.len > 0:
|
|
self.totalBlocks = uint64.fromBytesBE(total).uint
|
|
trace "Number of blocks in store at start", total = self.totalBlocks
|
|
|
|
## load current persist and cache bytes from meta ds
|
|
without quotaUsedBytes =? await self.metaDs.get(QuotaUsedKey), err:
|
|
if not (err of DatastoreKeyNotFound):
|
|
error "Error getting cache bytes from datastore",
|
|
err = err.msg, key = $QuotaUsedKey
|
|
|
|
raise newException(Defect, err.msg)
|
|
|
|
if quotaUsedBytes.len > 0:
|
|
self.quotaUsedBytes = uint64.fromBytesBE(quotaUsedBytes).uint
|
|
|
|
notice "Current bytes used for cache quota", bytes = self.quotaUsedBytes
|
|
|
|
without quotaReservedBytes =? await self.metaDs.get(QuotaReservedKey), err:
|
|
if not (err of DatastoreKeyNotFound):
|
|
error "Error getting persist bytes from datastore",
|
|
err = err.msg, key = $QuotaReservedKey
|
|
|
|
raise newException(Defect, err.msg)
|
|
|
|
if quotaReservedBytes.len > 0:
|
|
self.quotaReservedBytes = uint64.fromBytesBE(quotaReservedBytes).uint
|
|
|
|
if self.quotaUsedBytes > self.quotaMaxBytes:
|
|
raiseAssert "All storage quota used, increase storage quota!"
|
|
|
|
notice "Current bytes used for persist quota", bytes = self.quotaReservedBytes
|
|
|
|
self.updateMetrics()
|
|
self.started = true
|
|
|
|
proc stop*(self: RepoStore): Future[void] {.async.} =
|
|
## Stop repo
|
|
##
|
|
if not self.started:
|
|
trace "Repo is not started"
|
|
return
|
|
|
|
trace "Stopping repo"
|
|
(await self.repoDs.close()).expect("Should close repo store!")
|
|
(await self.metaDs.close()).expect("Should close meta store!")
|
|
|
|
self.started = false
|
|
|
|
func new*(
|
|
T: type RepoStore,
|
|
repoDs: Datastore,
|
|
metaDs: Datastore,
|
|
clock: Clock = SystemClock.new(),
|
|
postFixLen = 2,
|
|
quotaMaxBytes = DefaultQuotaBytes,
|
|
blockTtl = DefaultBlockTtl
|
|
): RepoStore =
|
|
## Create new instance of a RepoStore
|
|
##
|
|
RepoStore(
|
|
repoDs: repoDs,
|
|
metaDs: metaDs,
|
|
clock: clock,
|
|
postFixLen: postFixLen,
|
|
quotaMaxBytes: quotaMaxBytes,
|
|
blockTtl: blockTtl)
|