From 2adb43e792bbd8d2cccf0773672f25bd5f4a0613 Mon Sep 17 00:00:00 2001
From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date: Thu, 26 Nov 2020 00:46:27 +0100
Subject: storeio: Translate short reads to EIO

* storeio/dev.c (dev_buf_fill): When store returns less bytes than the
block size, assume an EIO.
---
 storeio/dev.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/storeio/dev.c b/storeio/dev.c
index 8bdfa111..c229f37b 100644
--- a/storeio/dev.c
+++ b/storeio/dev.c
@@ -87,6 +87,14 @@ dev_buf_fill (struct dev *dev, off_t offs)
   if (err)
     return err;
 
+  if (buf_len < store->block_size)
+    {
+      /* Short read, translate this to EIO */
+      if (buf != dev->buf)
+	munmap (buf, buf_len);
+      return EIO;
+    }
+
   if (buf != dev->buf)
     {
       munmap (dev->buf, store->block_size);
-- 
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