[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, 18 insertions, 0 deletions

diff --git a/xlators/features/changelog/src/changelog-helpers.h b/xlators/features/changelog/src/changelog-helpers.h
index 1b8fcb8675a..517c4dc4883 100644
--- a/xlators/features/changelog/src/changelog-helpers.h
+++ b/xlators/features/changelog/src/changelog-helpers.h
@@ -307,6 +307,24 @@ struct changelog_priv {
 
     /* glusterfind dependency to capture paths on deleted entries*/
     gf_boolean_t capture_del_path;
+
+    /* Save total no. of listners */
+    gf_atomic_t listnercnt;
+
+    /* Save total no. of xprt are associated with listner */
+    gf_atomic_t xprtcnt;
+
+    /* Save xprt list */
+    struct list_head xprt_list;
+
+    /* Save total no. of client connection */
+    gf_atomic_t clntcnt;
+
+    /* Save cleanup brick in victim */
+    xlator_t *victim;
+
+    /* Status to save cleanup notify status */
+    gf_boolean_t notify_down;
 };
 
 struct changelog_local {