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-rw-r--r--lib/mnesia/src/mnesia_controller.erl27
1 files changed, 17 insertions, 10 deletions
diff --git a/lib/mnesia/src/mnesia_controller.erl b/lib/mnesia/src/mnesia_controller.erl
index 9bc480e619..9971953c1f 100644
--- a/lib/mnesia/src/mnesia_controller.erl
+++ b/lib/mnesia/src/mnesia_controller.erl
@@ -52,6 +52,7 @@
async_dump_log/1,
sync_dump_log/1,
connect_nodes/1,
+ connect_nodes/2,
wait_for_schema_commit_lock/0,
release_schema_commit_lock/0,
create_table/1,
@@ -94,7 +95,7 @@
load_and_reply/2,
send_and_reply/2,
wait_for_tables_init/2,
- connect_nodes2/2
+ connect_nodes2/3
]).
-import(mnesia_lib, [set/2, add/2]).
@@ -420,12 +421,15 @@ try_schedule_late_disc_load(Tabs, Reason, MsgTag) ->
[[Tabs, Reason, MsgTag], AbortReason])
end.
-connect_nodes(Ns) ->
+connect_nodes(Ns) ->
+ connect_nodes(Ns, fun default_merge/1).
+
+connect_nodes(Ns, UserFun) ->
case mnesia:system_info(is_running) of
no ->
{error, {node_not_running, node()}};
yes ->
- Pid = spawn_link(?MODULE,connect_nodes2,[self(),Ns]),
+ Pid = spawn_link(?MODULE,connect_nodes2,[self(),Ns, UserFun]),
receive
{?MODULE, Pid, Res, New} ->
case Res of
@@ -443,7 +447,7 @@ connect_nodes(Ns) ->
end
end.
-connect_nodes2(Father, Ns) ->
+connect_nodes2(Father, Ns, UserFun) ->
Current = val({current, db_nodes}),
abcast([node()|Ns], {merging_schema, node()}),
{NewC, OldC} = mnesia_recover:connect_nodes(Ns),
@@ -451,7 +455,7 @@ connect_nodes2(Father, Ns) ->
New1 = mnesia_lib:intersect(Ns, Connected),
New = New1 -- Current,
process_flag(trap_exit, true),
- Res = try_merge_schema(New),
+ Res = try_merge_schema(New, UserFun),
Msg = {schema_is_merged, [], late_merge, []},
multicall([node()|Ns], Msg),
After = val({current, db_nodes}),
@@ -465,7 +469,7 @@ connect_nodes2(Father, Ns) ->
merge_schema() ->
AllNodes = mnesia_lib:all_nodes(),
- case try_merge_schema(AllNodes) of
+ case try_merge_schema(AllNodes, fun default_merge/1) of
ok ->
schema_is_merged();
{aborted, {throw, Str}} when is_list(Str) ->
@@ -474,8 +478,11 @@ merge_schema() ->
fatal("Failed to merge schema: ~p~n", [Else])
end.
-try_merge_schema(Nodes) ->
- case mnesia_schema:merge_schema() of
+default_merge(F) ->
+ F([]).
+
+try_merge_schema(Nodes, UserFun) ->
+ case mnesia_schema:merge_schema(UserFun) of
{atomic, not_merged} ->
%% No more nodes that we need to merge the schema with
ok;
@@ -488,11 +495,11 @@ try_merge_schema(Nodes) ->
im_running(OldFriends, NewFriends),
im_running(NewFriends, OldFriends),
- try_merge_schema(Nodes);
+ try_merge_schema(Nodes, UserFun);
{atomic, {"Cannot get cstructs", Node, Reason}} ->
dbg_out("Cannot get cstructs, Node ~p ~p~n", [Node, Reason]),
timer:sleep(1000), % Avoid a endless loop look alike
- try_merge_schema(Nodes);
+ try_merge_schema(Nodes, UserFun);
Other ->
Other
end.