Correct off-by-one in maximum-immutable-share-size for old servers. fixes #1781

[tahoe-lafs/tahoe-lafs.git] / src / allmydata / storage_client.py

diff --git a/src/allmydata/storage_client.py b/src/allmydata/storage_client.py
index a0cd7ddad810dab97be2c8fffb77654b96d08416..39753e0cb79396dceb16f1b6c1cc2d16f6110794 100644 (file)
--- a/src/allmydata/storage_client.py
+++ b/src/allmydata/storage_client.py
@@ -178,7 +178,7 @@ class NativeStorageServer:
 
     VERSION_DEFAULTS = {
         "http://allmydata.org/tahoe/protocols/storage/v1" :
-        { "maximum-immutable-share-size": 2**32,
+        { "maximum-immutable-share-size": 2**32 - 1,
           "maximum-mutable-share-size": 2*1000*1000*1000, # maximum prior to v1.9.2
           "tolerates-immutable-read-overrun": False,
           "delete-mutable-shares-with-zero-length-writev": False,