gluster: Sometimes Brick process is crashed at the time of stopping brick

Problem: Sometimes brick process is getting crashed at the time
         of stop brick while brick mux is enabled.

Solution: Brick process was getting crashed because of rpc connection
          was not cleaning properly while brick mux is enabled.In this patch
          after sending GF_EVENT_CLEANUP notification to xlator(server)
          waits for all rpc client connection destroy for specific xlator.Once rpc
          connections are destroyed in server_rpc_notify for all associated client
          for that brick then call xlator_mem_cleanup for for brick xlator as well as
          all child xlators.To avoid races at the time of cleanup introduce
          two new flags at each xlator cleanup_starting, call_cleanup.

BUG: 1544090
Signed-off-by: Mohit Agrawal <moagrawa@redhat.com>

Note: Run all test-cases in separate build (https://review.gluster.org/#/c/19700/)
      with same patch after enable brick mux forcefully, all test cases are
      passed.

Change-Id: Ic4ab9c128df282d146cf1135640281fcb31997bf
updates: bz#1544090

1 files changed, 1 insertions, 1 deletions

diff --git a/xlators/protocol/server/src/server.h b/xlators/protocol/server/src/server.h
index 393219bf290..ea1fbf92919 100644
--- a/xlators/protocol/server/src/server.h
+++ b/xlators/protocol/server/src/server.h
@@ -99,7 +99,7 @@ struct _child_status {
         struct list_head status_list;
         char *name;
         gf_boolean_t child_up;
-
+        gf_atomic_t  xprtrefcnt;
 };
 struct server_conf {
         rpcsvc_t               *rpc;