protocol/server: Clear internal locks on disconnect

If there is a disconnect observed on the client when the
inode/entry unlock is issued, but the reconnection to server
happens with in the grace-time period the inode/entry lk will
live and the unlock will never come from that client.
The internal locks should be cleared on disconnect.

Change-Id: Ib45b1035cfe3b1de381ef3b331c930011e7403be
BUG: 803209
Signed-off-by: Pranith Kumar K <pranithk@gluster.com>
Reviewed-on: http://review.gluster.com/2966
Reviewed-by: Anand Avati <avati@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>

4 files changed, 26 insertions, 12 deletions

diff --git a/xlators/protocol/server/src/server-handshake.c b/xlators/protocol/server/src/server-handshake.c
index 1698a3f5cda..d951aad9cad 100644
--- a/xlators/protocol/server/src/server-handshake.c
+++ b/xlators/protocol/server/src/server-handshake.c
@@ -436,7 +436,8 @@ server_setvolume (rpcsvc_request_t *req)
                 server_connection_put (this, conn, NULL);
         if (conn->lk_version != 0 &&
             conn->lk_version != lk_version) {
-                (void) server_connection_cleanup (this, conn);
+                (void) server_connection_cleanup (this, conn,
+                                                  INTERNAL_LOCKS | POSIX_LOCKS);
         }
 
         if (req->trans->xl_private != conn)
diff --git a/xlators/protocol/server/src/server-helpers.c b/xlators/protocol/server/src/server-helpers.c
index 40b1efc9b95..adcf9c1f1ed 100644
--- a/xlators/protocol/server/src/server-helpers.c
+++ b/xlators/protocol/server/src/server-helpers.c
@@ -506,15 +506,17 @@ do_connection_cleanup (xlator_t *this, server_connection_t *conn,
 
         GF_VALIDATE_OR_GOTO ("server", this, out);
         GF_VALIDATE_OR_GOTO ("server", conn, out);
-        GF_VALIDATE_OR_GOTO ("server", fdentries, out);
-        GF_VALIDATE_OR_GOTO ("server", ltable, out);
+
+        if (!ltable && !fdentries)
+                goto out;
 
         frame = create_frame (this, this->ctx->pool);
         if (frame == NULL) {
                 goto out;
         }
 
-        saved_ret = do_lock_table_cleanup (this, conn, frame, ltable);
+        if (ltable)
+                saved_ret = do_lock_table_cleanup (this, conn, frame, ltable);
 
         if (fdentries != NULL) {
                 ret = do_fd_cleanup (this, conn, frame, fdentries, fd_count);
@@ -536,24 +538,26 @@ out:
 
 
 int
-server_connection_cleanup (xlator_t *this, server_connection_t *conn)
+server_connection_cleanup (xlator_t *this, server_connection_t *conn,
+                           int32_t flags)
 {
         struct _lock_table *ltable = NULL;
         fdentry_t          *fdentries = NULL;
         uint32_t            fd_count = 0;
         int                 ret = 0;
 
-        GF_VALIDATE_OR_GOTO ("server", this, out);
-        GF_VALIDATE_OR_GOTO ("server", conn, out);
+        GF_VALIDATE_OR_GOTO (this->name, this, out);
+        GF_VALIDATE_OR_GOTO (this->name, conn, out);
+        GF_VALIDATE_OR_GOTO (this->name, flags, out);
 
         pthread_mutex_lock (&conn->lock);
         {
-                if (conn->ltable) {
+                if (conn->ltable && (flags & INTERNAL_LOCKS)) {
                         ltable = conn->ltable;
                         conn->ltable = gf_lock_table_new ();
                 }
 
-                if (conn->fdtable)
+                if (conn->fdtable && (flags & POSIX_LOCKS))
                         fdentries = gf_fd_fdtable_get_all_fds (conn->fdtable,
                                                                &fd_count);
         }
diff --git a/xlators/protocol/server/src/server.c b/xlators/protocol/server/src/server.c
index 33889fd9b15..3c3147a19d4 100644
--- a/xlators/protocol/server/src/server.c
+++ b/xlators/protocol/server/src/server.c
@@ -58,7 +58,8 @@ grace_time_handler (void *data)
                 server_conn_ref (conn);
                 server_connection_put (this, conn, &detached);
                 if (detached)//reconnection did not happen :-(
-                        server_connection_cleanup (this, conn);
+                        server_connection_cleanup (this, conn,
+                                                  INTERNAL_LOCKS | POSIX_LOCKS);
                 server_conn_unref (conn);
         }
 out:
@@ -170,7 +171,8 @@ server_submit_reply (call_frame_t *frame, rpcsvc_request_t *req, void *arg,
         if (ret == -1) {
                 gf_log_callingfn ("", GF_LOG_ERROR, "Reply submission failed");
                 if (frame && conn)
-                        server_connection_cleanup (frame->this, conn);
+                        server_connection_cleanup (frame->this, conn,
+                                                  INTERNAL_LOCKS | POSIX_LOCKS);
                 goto ret;
         }
 
@@ -644,6 +646,7 @@ server_rpc_notify (rpcsvc_t *rpc, void *xl, rpcsvc_event_t event,
                 put_server_conn_state (this, xprt);
                 gf_log (this->name, GF_LOG_INFO, "disconnecting connection"
                         "from %s", xprt->peerinfo.identifier);
+                server_connection_cleanup (this, conn, INTERNAL_LOCKS);
                 pthread_mutex_lock (&conf->mutex);
                 {
                         list_del (&xprt->list);
diff --git a/xlators/protocol/server/src/server.h b/xlators/protocol/server/src/server.h
index 831c309a245..4213faa174d 100644
--- a/xlators/protocol/server/src/server.h
+++ b/xlators/protocol/server/src/server.h
@@ -35,6 +35,11 @@
 #define GF_MAX_SOCKET_WINDOW_SIZE  (1 * GF_UNIT_MB)
 #define GF_MIN_SOCKET_WINDOW_SIZE  (0)
 
+typedef enum {
+        INTERNAL_LOCKS = 1,
+        POSIX_LOCKS = 2,
+} server_lock_flags_t;
+
 typedef struct _server_state server_state_t;
 
 struct _locker {
@@ -86,7 +91,8 @@ server_connection_t*
 server_conn_ref (server_connection_t *conn);
 
 int
-server_connection_cleanup (xlator_t *this, server_connection_t *conn);
+server_connection_cleanup (xlator_t *this, server_connection_t *conn,
+                           int32_t flags);
 
 int server_null (rpcsvc_request_t *req);