From: Yingxin Cheng <yingxincheng@gmail.com>
Date: Thu, 21 Mar 2019 14:21:07 +0000 (+0800)
Subject: crimson/net: fix Socket::read_exactly(0) case
X-Git-Tag: v15.1.0~3027^2~5
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=b6beb6888541cdad67b6bf0c4e6198ce31219c42;p=ceph.git

crimson/net: fix Socket::read_exactly(0) case

Do not raise read_eof when try to read 0 bytes.

Signed-off-by: Yingxin Cheng <yingxincheng@gmail.com>
---

diff --git a/src/crimson/net/Socket.cc b/src/crimson/net/Socket.cc
index a22e9b2eac66..3ea65d41a54b 100644
--- a/src/crimson/net/Socket.cc
+++ b/src/crimson/net/Socket.cc
@@ -69,6 +69,9 @@ seastar::future<bufferlist> Socket::read(size_t bytes)
 
 seastar::future<seastar::temporary_buffer<char>>
 Socket::read_exactly(size_t bytes) {
+  if (bytes == 0) {
+    return seastar::make_ready_future<seastar::temporary_buffer<char>>();
+  }
   return in.read_exactly(bytes)
     .then([this](auto buf) {
       if (buf.empty()) {