From: Yehuda Sadeh <yehuda@hq.newdream.net>
Date: Thu, 23 Jun 2011 00:13:22 +0000 (-0700)
Subject: librados: fix end_block calculation for aio_read
X-Git-Tag: v0.30~4^2
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=5da066286c81fbb7ed1c63281252368b039c07bb;p=ceph.git

librados: fix end_block calculation for aio_read
---

diff --git a/src/librbd.cc b/src/librbd.cc
index 73dba632c94..095790a2a2a 100644
--- a/src/librbd.cc
+++ b/src/librbd.cc
@@ -1251,7 +1251,7 @@ void AioBlockCompletion::complete(ssize_t r)
       dout(10) << "block_ofs=" << block_ofs << dendl;
 
       /* a hole? */
-      if (extent_ofs - block_ofs) {
+      if (extent_ofs - block_ofs > 0) {
 	dout(10) << "<1>zeroing " << buf_bl_pos << "~" << extent_ofs << dendl;
         dout(10) << "buf=" << (void *)(buf + buf_bl_pos) << "~" << (void *)(buf + extent_ofs - ofs - 1) << dendl;
         memset(buf + buf_bl_pos, 0, extent_ofs - block_ofs);
@@ -1391,7 +1391,7 @@ int aio_read(ImageCtx *ictx, uint64_t off, size_t len,
   int64_t ret;
   int total_read = 0;
   uint64_t start_block = get_block_num(&ictx->header, off);
-  uint64_t end_block = get_block_num(&ictx->header, off + len);
+  uint64_t end_block = get_block_num(&ictx->header, off + len - 1);
   uint64_t block_size = get_block_size(&ictx->header);
   uint64_t left = len;