From: Brian Warner <warner@lothar.com>
Date: Mon, 20 Oct 2008 17:22:08 +0000 (-0700)
Subject: storage.py: assert that immutable share size will fit in the 4-byte v1 container... 
X-Git-Url: https://git.rkrishnan.org/vdrive/%22file:/frontends/using.html?a=commitdiff_plain;h=0832334c0d3fb88001b52c999bf05901f8c02100;p=tahoe-lafs%2Ftahoe-lafs.git

storage.py: assert that immutable share size will fit in the 4-byte v1 container (see #346). The struct module in py2.4 raises an error on overflow, but py2.5 merely emits a warning
---

diff --git a/src/allmydata/storage.py b/src/allmydata/storage.py
index 59d671da..8098edbc 100644
--- a/src/allmydata/storage.py
+++ b/src/allmydata/storage.py
@@ -236,6 +236,7 @@ class BucketWriter(Referenceable):
         fileutil.make_dirs(os.path.dirname(incominghome))
         # Also construct the metadata.
         f = open(incominghome, 'wb')
+        precondition(size < 2**32) # v1 container format: 4-byte size field
         f.write(struct.pack(">LLL", 1, size, 0))
         f.close()
         self._sharefile = ShareFile(incominghome)