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add readonly option to lmdb and rocksdb backend

This commit is contained in:
andri lim 2019-04-01 15:11:18 +07:00 committed by zah
parent 7954c0c7ed
commit 2d75751960
2 changed files with 12 additions and 8 deletions
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10
eth/trie/backends/lmdb_backend.nim
View File

@ -10,6 +10,7 @@ else:
const
MDB_NOSUBDIR = 0x4000
MDB_RDONLY = 0x20000
MDB_NOTFOUND = -30798
when defined(cpu64):
@ -147,7 +148,7 @@ proc del*(db: ChainDB, key: openarray[byte]) =
proc close*(db: ChainDB) =
mdb_env_close(db.env)
proc newChainDB*(basePath: string): ChainDB =
proc newChainDB*(basePath: string, readOnly = false): ChainDB =
result.new()
let dataDir = basePath / "nimbus.db"
@ -157,8 +158,11 @@ proc newChainDB*(basePath: string): ChainDB =
ok = mdb_env_set_mapsize(result.env, LMDB_MAP_SIZE) == 0
if not ok: raiseStorageInitError()
var openFlags = MDB_NOSUBDIR
if readOnly: openFlags = openFlags or MDB_RDONLY
# file mode ignored on windows
ok = mdb_env_open(result.env, dataDir, MDB_NOSUBDIR.cuint, 0o664.cint) == 0
ok = mdb_env_open(result.env, dataDir, openFlags.cuint, 0o664.cint) == 0
if not ok: raiseStorageInitError()
result.put(emptyRlpHash.data, emptyRlp)
if not readOnly:
result.put(emptyRlpHash.data, emptyRlp)

8
eth/trie/backends/rocksdb_backend.nim
View File

@ -35,7 +35,7 @@ proc del*(db: ChainDB, key: openarray[byte]) =
proc close*(db: ChainDB) =
db.store.close
proc newChainDB*(basePath: string): ChainDB =
proc newChainDB*(basePath: string, readOnly = false): ChainDB =
result.new()
let
dataDir = basePath / "data"
@ -44,8 +44,8 @@ proc newChainDB*(basePath: string): ChainDB =
createDir(dataDir)
createDir(backupsDir)
let s = result.store.init(dataDir, backupsDir)
let s = result.store.init(dataDir, backupsDir, readOnly)
if not s.ok: raiseStorageInitError()
put(result, emptyRlpHash.data, emptyRlp)
if not readOnly:
put(result, emptyRlpHash.data, emptyRlp)