From c1f4d4a6d5c189f7cd4b3b073fb47f8dfb8d3fff Mon Sep 17 00:00:00 2001 From: Dan Gudmundsson Date: Tue, 9 Feb 2016 15:11:30 +0100 Subject: mnesia: let loader check if tablelock is needed move_table_copy needs the lock that was set previously in del_table_copy. This doesn't work on old nodes, so bump protocol version and check it. Remove old protocol conversion code, which have been around since OTP-R15. Checking if lock is needed requires rpc communication via mnesia_gvar ets table to be backwards compatible. --- lib/mnesia/src/mnesia_controller.erl | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-) (limited to 'lib/mnesia/src/mnesia_controller.erl') diff --git a/lib/mnesia/src/mnesia_controller.erl b/lib/mnesia/src/mnesia_controller.erl index 02c175760e..69ccc1d2c9 100644 --- a/lib/mnesia/src/mnesia_controller.erl +++ b/lib/mnesia/src/mnesia_controller.erl @@ -78,7 +78,7 @@ change_table_majority/1, del_active_replica/2, wait_for_tables/2, - get_network_copy/2, + get_network_copy/3, merge_schema/0, start_remote_sender/4, schedule_late_disc_load/2 @@ -329,14 +329,14 @@ release_schema_commit_lock() -> unlink(whereis(?SERVER_NAME)). %% Special for preparation of add table copy -get_network_copy(Tab, Cs) -> +get_network_copy(Tid, Tab, Cs) -> % We can't let the controller queue this one % because that may cause a deadlock between schema_operations % and initial tableloadings which both takes schema locks. % But we have to get copier_done msgs when the other side % goes down. call({add_other, self()}), - Reason = {dumper,add_table_copy}, + Reason = {dumper,{add_table_copy, Tid}}, Work = #net_load{table = Tab,reason = Reason,cstruct = Cs}, %% I'll need this cause it's linked trough the subscriber %% might be solved by using monitor in subscr instead. @@ -775,7 +775,7 @@ handle_call({net_load, Tab, Cs}, From, State) -> true -> Worker = #net_load{table = Tab, opt_reply_to = From, - reason = {dumper,add_table_copy}, + reason = {dumper,{add_table_copy, unknown}}, cstruct = Cs }, add_worker(Worker, State); @@ -1180,11 +1180,11 @@ handle_info(Done = #loader_done{worker_pid=WPid, table_name=Tab}, State0) -> Done#loader_done.needs_announce == true, Done#loader_done.needs_reply == true -> i_have_tab(Tab), - %% Should be {dumper,add_table_copy} only + %% Should be {dumper,{add_table_copy, _}} only reply(Done#loader_done.reply_to, Done#loader_done.reply); Done#loader_done.needs_reply == true -> - %% Should be {dumper,add_table_copy} only + %% Should be {dumper,{add_table_copy,_}} only reply(Done#loader_done.reply_to, Done#loader_done.reply); Done#loader_done.needs_announce == true, Tab == schema -> @@ -2148,6 +2148,10 @@ load_table_fun(#net_load{cstruct=Cs, table=Tab, reason=Reason, opt_reply_to=Repl reply_to = ReplyTo, reply = {loaded, ok} }, + AddTableCopy = case Reason of + {dumper,{add_table_copy,_}} -> true; + _ -> false + end, if ReadNode == node() -> %% Already loaded locally @@ -2157,7 +2161,7 @@ load_table_fun(#net_load{cstruct=Cs, table=Tab, reason=Reason, opt_reply_to=Repl Res = mnesia_loader:disc_load_table(Tab, load_local_content), Done#loader_done{reply = Res, needs_announce = true, needs_sync = true} end; - AccessMode == read_only, Reason /= {dumper,add_table_copy} -> + AccessMode == read_only, not AddTableCopy -> fun() -> disc_load_table(Tab, Reason, ReplyTo) end; true -> fun() -> -- cgit v1.2.3