Get rid of direct calls to 'session' Mnesia table

Fixes #2439

src/ejabberd_sm.erl

@@ -62,6 +62,7 @@
 	 connected_users_number/0,
 	 user_resources/2,
 	 kick_user/2,
+	 kick_user/3,
 	 get_session_pid/3,
 	 get_session_sid/3,
 	 get_session_sids/2,
@@ -978,14 +979,23 @@ user_resources(User, Server) ->
     Resources = get_user_resources(User, Server),
     lists:sort(Resources).
 
+-spec kick_user(binary(), binary()) -> non_neg_integer().
 kick_user(User, Server) ->
     Resources = get_user_resources(User, Server),
-    lists:foreach(
-	fun(Resource) ->
-		PID = get_session_pid(User, Server, Resource),
-		ejabberd_c2s:route(PID, kick)
-	end, Resources),
-    length(Resources).
+    lists:foldl(
+      fun(Resource, Acc) ->
+	      case kick_user(User, Server, Resource) of
+		  false -> Acc;
+		  true -> Acc + 1
+	      end
+      end, 0, Resources).
+
+-spec kick_user(binary(), binary(), binary()) -> boolean().
+kick_user(User, Server, Resource) ->
+    case get_session_pid(User, Server, Resource) of
+	none -> false;
+	Pid -> ejabberd_c2s:route(Pid, kick)
+    end.
 
 make_sid() ->
     {p1_time_compat:unique_timestamp(), self()}.

src/mod_configure.erl

@@ -1552,39 +1552,17 @@ set_form(From, Host, ?NS_ADMINL(<<"delete-user">>),
      || {User, Server} <- ASL2],
     {result, undefined};
 set_form(From, Host, ?NS_ADMINL(<<"end-user-session">>),
-	 Lang, XData) ->
+	 _Lang, XData) ->
     AccountString = get_value(<<"accountjid">>, XData),
     JID = jid:decode(AccountString),
-    LUser = JID#jid.luser,
     LServer = JID#jid.lserver,
     true = LServer == Host orelse
 	     get_permission_level(From) == global,
-    Xmlelement = xmpp:serr_policy_violation(<<"has been kicked">>, Lang),
     case JID#jid.lresource of
-      <<>> ->
-	  SIs = mnesia:dirty_select(session,
-				    [{#session{usr = {LUser, LServer, '_'},
-					       sid = '$1',
-					       info = '$2',
-						_ = '_'},
-				      [], [{{'$1', '$2'}}]}]),
-	  Pids = [P || {{_, P}, Info} <- SIs,
-		       not proplists:get_bool(offline, Info)],
-	  lists:foreach(fun(Pid) ->
-				Pid ! {kick, kicked_by_admin, Xmlelement}
-			end, Pids);
-      R ->
-	  [{{_, Pid}, Info}] = mnesia:dirty_select(
-				 session,
-				 [{#session{usr = {LUser, LServer, R},
-					    sid = '$1',
-					    info = '$2',
-						      _ = '_'},
-				   [], [{{'$1', '$2'}}]}]),
-	  case proplists:get_bool(offline, Info) of
-	    true -> ok;
-	    false -> Pid ! {kick, kicked_by_admin, Xmlelement}
-	  end
+	<<>> ->
+	    ejabberd_sm:kick_user(JID#jid.luser, JID#jid.lserver);
+	R ->
+	    ejabberd_sm:kick_user(JID#jid.luser, JID#jid.lserver, R)
     end,
     {result, undefined};
 set_form(From, Host,