[geo-rep]: Worker still ACTIVE after killing bricks

Problem: In changelog xlator after destroying listener it call's
         unlink to delete changelog socket file but socket file
         reference is not cleaned up from process memory

Solution: 1) To cleanup reference completely from process memory
             serialize transport cleanup for changelog and then
             unlink socket file
          2) Brick xlator will notify GF_EVENT_PARENT_DOWN to next
             xlator only after cleanup all xprts

Test: To test the same run below steps
      1) Setup some volume and enable brick mux
      2) kill anyone brick with gf_attach
      3) check changelog socket for specific to killed brick
         in lsof, it should cleanup completely

fixes: bz#1600145

Change-Id: Iba06cbf77d8a87b34a60fce50f6d8c0d427fa491
Signed-off-by: Mohit Agrawal <moagrawal@redhat.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/rpc/rpc-transport/socket/src/socket.c b/rpc/rpc-transport/socket/src/socket.c
index 38e52081b3c..b3f90079c3c 100644
--- a/rpc/rpc-transport/socket/src/socket.c
+++ b/rpc/rpc-transport/socket/src/socket.c
@@ -3009,6 +3009,12 @@ socket_server_event_handler(int fd, int idx, int gen, void *data, int poll_in,
      * thread context while we are using it here.
      */
     priv->idx = idx;
+    priv->gen = gen;
+
+    if (poll_err) {
+        socket_event_poll_err(this, gen, idx);
+        goto out;
+    }
 
     if (poll_in) {
         int aflags = 0;