From 0558423b210d9c9929c30d19c1dc63d9b0d05b05 Mon Sep 17 00:00:00 2001
From: Song Shun <song.shun3@zte.com.cn>
Date: Tue, 10 Apr 2018 13:41:18 +0800
Subject: [PATCH] librbd: fix rbd close race with rewatch

  fix rbd close race with rewatch

Signed-off-by: Song Shun <song.shun3@zte.com.cn>
(cherry picked from commit 8b833a293eac54fd3d38f12660d856ecc310d805)

Conflicts:
	src/librbd/Watcher.cc: trivial resolution
---
 src/librbd/Watcher.cc                               |  2 +-
 src/librbd/watcher/RewatchRequest.cc                | 13 ++-----------
 src/test/librbd/watcher/test_mock_RewatchRequest.cc |  3 +--
 3 files changed, 4 insertions(+), 14 deletions(-)

diff --git a/src/librbd/Watcher.cc b/src/librbd/Watcher.cc
index 6e31ad7c63592..9a72fc13a76b1 100644
--- a/src/librbd/Watcher.cc
+++ b/src/librbd/Watcher.cc
@@ -263,7 +263,7 @@ void Watcher::rewatch() {
 }
 
 void Watcher::handle_rewatch(int r) {
-  ldout(m_cct, 10) "r=" << r << dendl;
+  ldout(m_cct, 10) << "r=" << r << dendl;
 
   bool watch_error = false;
   Context *unregister_watch_ctx = nullptr;
diff --git a/src/librbd/watcher/RewatchRequest.cc b/src/librbd/watcher/RewatchRequest.cc
index fe236269793a9..22d2bb8e56788 100644
--- a/src/librbd/watcher/RewatchRequest.cc
+++ b/src/librbd/watcher/RewatchRequest.cc
@@ -78,19 +78,10 @@ void RewatchRequest::rewatch() {
 void RewatchRequest::handle_rewatch(int r) {
   CephContext *cct = reinterpret_cast<CephContext *>(m_ioctx.cct());
   ldout(cct, 10) << "r=" << r << dendl;
-
-  if (r == -EBLACKLISTED) {
-    lderr(cct) << "client blacklisted" << dendl;
-    finish(r);
-    return;
-  } else if (r == -ENOENT) {
-    ldout(cct, 5) << "object deleted" << dendl;
-    finish(r);
-    return;
-  } else if (r < 0) {
+  if (r < 0) {
     lderr(cct) << "failed to watch object: " << cpp_strerror(r)
                << dendl;
-    rewatch();
+    finish(r);
     return;
   }
 
diff --git a/src/test/librbd/watcher/test_mock_RewatchRequest.cc b/src/test/librbd/watcher/test_mock_RewatchRequest.cc
index 3b42b0e992491..e9e7d2fbe1dfe 100644
--- a/src/test/librbd/watcher/test_mock_RewatchRequest.cc
+++ b/src/test/librbd/watcher/test_mock_RewatchRequest.cc
@@ -176,7 +176,6 @@ TEST_F(TestMockWatcherRewatchRequest, WatchError) {
   InSequence seq;
   expect_aio_unwatch(mock_image_ctx, 0);
   expect_aio_watch(mock_image_ctx, -EINVAL);
-  expect_aio_watch(mock_image_ctx, 0);
 
   C_SaferCond ctx;
   MockRewatchRequest *req = MockRewatchRequest::create(mock_image_ctx.md_ctx,
@@ -189,7 +188,7 @@ TEST_F(TestMockWatcherRewatchRequest, WatchError) {
     RWLock::WLocker watch_locker(m_watch_lock);
     req->send();
   }
-  ASSERT_EQ(0, ctx.wait());
+  ASSERT_EQ(-EINVAL, ctx.wait());
 }
 
 } // namespace watcher
-- 
2.39.5