From: Haomai Wang <haomai@xsky.com>
Date: Thu, 28 Jan 2016 04:19:23 +0000 (+0800)
Subject: AsyncConnection: let ack reply use MSG_MORE flag
X-Git-Tag: v10.0.4~58^2
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=2e2eb4cbfe0824ed242f128769db131a988b6977;p=ceph.git

AsyncConnection: let ack reply use MSG_MORE flag

Signed-off-by: Haomai Wang <haomai@xsky.com>
---

diff --git a/src/msg/async/AsyncConnection.cc b/src/msg/async/AsyncConnection.cc
index 01a7335293ab..8c0cccb295cb 100644
--- a/src/msg/async/AsyncConnection.cc
+++ b/src/msg/async/AsyncConnection.cc
@@ -347,7 +347,7 @@ ssize_t AsyncConnection::do_sendmsg(struct msghdr &msg, unsigned len, bool more)
 
 // return the remaining bytes, it may larger than the length of ptr
 // else return < 0 means error
-ssize_t AsyncConnection::_try_send(bufferlist &send_bl, bool send)
+ssize_t AsyncConnection::_try_send(bufferlist &send_bl, bool send, bool more)
 {
   ldout(async_msgr->cct, 20) << __func__ << " send bl length is " << send_bl.length() << dendl;
   if (send_bl.length()) {
@@ -384,7 +384,7 @@ ssize_t AsyncConnection::_try_send(bufferlist &send_bl, bool send)
       size--;
     }
 
-    ssize_t r = do_sendmsg(msg, msglen, left_pbrs);
+    ssize_t r = do_sendmsg(msg, msglen, left_pbrs || more);
     if (r < 0)
       return r;
 
@@ -2459,7 +2459,7 @@ void AsyncConnection::_send_keepalive_or_ack(bool ack, utime_t *tp)
   }
 
   ldout(async_msgr->cct, 10) << __func__ << " try send keepalive or ack" << dendl;
-  _try_send(bl, false);
+  _try_send(bl, false, true);
 }
 
 void AsyncConnection::handle_write()
@@ -2503,7 +2503,7 @@ void AsyncConnection::handle_write()
       bl.append((char*)&s, sizeof(s));
       ldout(async_msgr->cct, 10) << __func__ << " try send msg ack, acked " << left << " messages" << dendl;
       ack_left.sub(left);
-      r = _try_send(bl);
+      r = _try_send(bl, true, true);
     } else if (is_queued()) {
       r = _try_send(bl);
     }
diff --git a/src/msg/async/AsyncConnection.h b/src/msg/async/AsyncConnection.h
index 44dc1f436ad7..049c2afee15a 100644
--- a/src/msg/async/AsyncConnection.h
+++ b/src/msg/async/AsyncConnection.h
@@ -49,13 +49,13 @@ class AsyncConnection : public Connection {
   void suppress_sigpipe();
   void restore_sigpipe();
   ssize_t do_sendmsg(struct msghdr &msg, unsigned len, bool more);
-  ssize_t try_send(bufferlist &bl, bool send=true) {
+  ssize_t try_send(bufferlist &bl, bool send=true, bool more=false) {
     Mutex::Locker l(write_lock);
-    return _try_send(bl, send);
+    return _try_send(bl, send, more);
   }
   // if "send" is false, it will only append bl to send buffer
   // the main usage is avoid error happen outside messenger threads
-  ssize_t _try_send(bufferlist &bl, bool send=true);
+  ssize_t _try_send(bufferlist &bl, bool send=true, bool more=false);
   ssize_t _send(Message *m);
   void prepare_send_message(uint64_t features, Message *m, bufferlist &bl);
   ssize_t read_until(unsigned needed, char *p);