posix: use synctask for janitor

With brick mux, the number of threads increases as the number of
bricks increases. As an initiative to reduce the number of
threads in brick mux scenario, replacing janitor thread to use
synctask infra.

Now close() and closedir() handle by separate janitor
thread which is linked with glusterfs_ctx.

Updates #475
Change-Id: I0c4aaf728125ab7264442fde59f3d08542785f73
Signed-off-by: Poornima G <pgurusid@redhat.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/libglusterfs/src/glusterfs/glusterfs.h b/libglusterfs/src/glusterfs/glusterfs.h
index 325241818c0..ae137c5d334 100644
--- a/libglusterfs/src/glusterfs/glusterfs.h
+++ b/libglusterfs/src/glusterfs/glusterfs.h
@@ -716,6 +716,12 @@ struct _glusterfs_ctx {
     } stats;
 
     struct list_head volfile_list;
+
+    /* Add members to manage janitor threads for cleanup fd */
+    struct list_head janitor_fds;
+    pthread_cond_t janitor_cond;
+    pthread_mutex_t janitor_lock;
+    pthread_t janitor;
 };
 typedef struct _glusterfs_ctx glusterfs_ctx_t;