diff options
Diffstat (limited to 'lib/mnesia/src/mnesia_bup.erl')
| -rw-r--r-- | lib/mnesia/src/mnesia_bup.erl | 241 |
1 files changed, 152 insertions, 89 deletions
diff --git a/lib/mnesia/src/mnesia_bup.erl b/lib/mnesia/src/mnesia_bup.erl index 2c756b1c75..3e55deb958 100644 --- a/lib/mnesia/src/mnesia_bup.erl +++ b/lib/mnesia/src/mnesia_bup.erl @@ -47,7 +47,7 @@ uninstall_fallback_master/2, local_uninstall_fallback/2, do_traverse_backup/7, - trav_apply/4 + trav_apply/5 ]). -include("mnesia.hrl"). @@ -82,7 +82,8 @@ iterate(Mod, Fun, Opaque, Acc) -> R = #restore{bup_module = Mod, bup_data = Opaque}, try read_schema_section(R) of {R2, {Header, Schema, Rest}} -> - try iter(R2, Header, Schema, Fun, Acc, Rest) of + Ext = get_ext_types(Schema), + try iter(R2, Header, Schema, Ext, Fun, Acc, Rest) of {ok, R3, Res} -> close_read(R3), {ok, Res} @@ -97,17 +98,32 @@ iterate(Mod, Fun, Opaque, Acc) -> Err end. -iter(R, Header, Schema, Fun, Acc, []) -> +get_ext_types(Schema) -> + try + List = lookup_schema(schema, Schema), + case lists:keyfind(user_properties, 1, List) of + {_, Props} -> + proplists:get_value( + mnesia_backend_types, Props, []); + false -> + [] + end + catch + throw:{error, {"Cannot lookup",_}} -> + [] + end. + +iter(R, Header, Schema, Ext, Fun, Acc, []) -> case safe_apply(R, read, [R#restore.bup_data]) of {R2, []} -> - Res = Fun([], Header, Schema, Acc), + Res = Fun([], Header, Schema, Ext, Acc), {ok, R2, Res}; {R2, BupItems} -> - iter(R2, Header, Schema, Fun, Acc, BupItems) + iter(R2, Header, Schema, Ext, Fun, Acc, BupItems) end; -iter(R, Header, Schema, Fun, Acc, BupItems) -> - Acc2 = Fun(BupItems, Header, Schema, Acc), - iter(R, Header, Schema, Fun, Acc2, []). +iter(R, Header, Schema, Ext, Fun, Acc, BupItems) -> + Acc2 = Fun(BupItems, Header, Schema, Ext, Acc), + iter(R, Header, Schema, Ext, Fun, Acc2, []). -spec safe_apply(#restore{}, atom(), list()) -> tuple(). safe_apply(R, write, [_, Items]) when Items =:= [] -> @@ -493,15 +509,15 @@ install_fallback_master(ClientPid, FA) -> State = {start, FA}, Opaque = FA#fallback_args.opaque, Mod = FA#fallback_args.module, - Res = iterate(Mod, fun restore_recs/4, Opaque, State), + Res = iterate(Mod, fun restore_recs/5, Opaque, State), unlink(ClientPid), ClientPid ! {self(), Res}, exit(shutdown). -restore_recs(_, _, _, stop) -> +restore_recs(_, _, _, _, stop) -> throw({error, "restore_recs already stopped"}); -restore_recs(Recs, Header, Schema, {start, FA}) -> +restore_recs(Recs, Header, Schema, Ext, {start, FA}) -> %% No records in backup Schema2 = convert_schema(Header#log_header.log_version, Schema), CreateList = lookup_schema(schema, Schema2), @@ -512,19 +528,19 @@ restore_recs(Recs, Header, Schema, {start, FA}) -> Args = [self(), FA], Pids = [spawn_link(N, ?MODULE, fallback_receiver, Args) || N <- Ns], send_fallback(Pids, {start, Header, Schema2}), - Res = restore_recs(Recs, Header, Schema2, Pids), + Res = restore_recs(Recs, Header, Schema2, Ext, Pids), global:del_lock({{mnesia_table_lock, schema}, self()}, Ns), Res catch _:Reason -> throw({error, {"Bad schema in restore_recs", Reason}}) end; -restore_recs([], _Header, _Schema, Pids) -> +restore_recs([], _Header, _Schema, _Ext, Pids) -> send_fallback(Pids, swap), send_fallback(Pids, stop), stop; -restore_recs(Recs, _, _, Pids) -> +restore_recs(Recs, _, _, _, Pids) -> send_fallback(Pids, {records, Recs}), Pids. @@ -723,7 +739,7 @@ do_fallback_start(true, false) -> BupFile = fallback_bup(), Mod = mnesia_backup, LocalTabs = ?ets_new_table(mnesia_local_tables, [set, public, {keypos, 2}]), - case iterate(Mod, fun restore_tables/4, BupFile, {start, LocalTabs}) of + case iterate(Mod, fun restore_tables/5, BupFile, {start, LocalTabs}) of {ok, _Res} -> ?SAFE(dets:close(schema)), TmpSchema = mnesia_lib:tab2tmp(schema), @@ -744,23 +760,24 @@ do_fallback_start(true, false) -> {error, {"Cannot start from fallback", Reason}} end. -restore_tables(All=[Rec | Recs], Header, Schema, State={local, LocalTabs, LT}) -> +restore_tables(All=[Rec | Recs], Header, Schema, Ext, + State={local, LocalTabs, LT}) -> Tab = element(1, Rec), if Tab =:= LT#local_tab.name -> Key = element(2, Rec), (LT#local_tab.add)(Tab, Key, Rec, LT), - restore_tables(Recs, Header, Schema, State); + restore_tables(Recs, Header, Schema, Ext, State); true -> NewState = {new, LocalTabs}, - restore_tables(All, Header, Schema, NewState) + restore_tables(All, Header, Schema, Ext, NewState) end; -restore_tables(All=[Rec | Recs], Header, Schema, {new, LocalTabs}) -> +restore_tables(All=[Rec | Recs], Header, Schema, Ext, {new, LocalTabs}) -> Tab = element(1, Rec), case ?ets_lookup(LocalTabs, Tab) of [] -> State = {not_local, LocalTabs, Tab}, - restore_tables(Recs, Header, Schema, State); + restore_tables(Recs, Header, Schema, Ext, State); [LT] when is_record(LT, local_tab) -> State = {local, LocalTabs, LT}, case LT#local_tab.opened of @@ -769,38 +786,39 @@ restore_tables(All=[Rec | Recs], Header, Schema, {new, LocalTabs}) -> (LT#local_tab.open)(Tab, LT), ?ets_insert(LocalTabs,LT#local_tab{opened=true}) end, - restore_tables(All, Header, Schema, State) + restore_tables(All, Header, Schema, Ext, State) end; -restore_tables(All=[Rec | Recs], Header, Schema, S = {not_local, LocalTabs, PrevTab}) -> +restore_tables(All=[Rec | Recs], Header, Schema, Ext, + S = {not_local, LocalTabs, PrevTab}) -> Tab = element(1, Rec), if Tab =:= PrevTab -> - restore_tables(Recs, Header, Schema, S); + restore_tables(Recs, Header, Schema, Ext, S); true -> State = {new, LocalTabs}, - restore_tables(All, Header, Schema, State) + restore_tables(All, Header, Schema, Ext, State) end; -restore_tables(Recs, Header, Schema, {start, LocalTabs}) -> +restore_tables(Recs, Header, Schema, Ext, {start, LocalTabs}) -> Dir = mnesia_lib:dir(), OldDir = filename:join([Dir, "OLD_DIR"]), mnesia_schema:purge_dir(OldDir, []), mnesia_schema:purge_dir(Dir, [fallback_name()]), - init_dat_files(Schema, LocalTabs), + init_dat_files(Schema, Ext, LocalTabs), State = {new, LocalTabs}, - restore_tables(Recs, Header, Schema, State); -restore_tables([], _Header, _Schema, State) -> + restore_tables(Recs, Header, Schema, Ext, State); +restore_tables([], _Header, _Schema, _Ext, State) -> State. %% Creates all neccessary dat files and inserts %% the table definitions in the schema table %% %% Returns a list of local_tab tuples for all local tables -init_dat_files(Schema, LocalTabs) -> +init_dat_files(Schema, Ext, LocalTabs) -> TmpFile = mnesia_lib:tab2tmp(schema), Args = [{file, TmpFile}, {keypos, 2}, {type, set}], case dets:open_file(schema, Args) of % Assume schema lock {ok, _} -> - create_dat_files(Schema, LocalTabs), + create_dat_files(Schema, Ext, LocalTabs), ok = dets:close(schema), LocalTab = #local_tab{name = schema, storage_type = disc_copies, @@ -815,10 +833,10 @@ init_dat_files(Schema, LocalTabs) -> throw({error, {"Cannot open file", schema, Args, Reason}}) end. -create_dat_files([{schema, schema, TabDef} | Tail], LocalTabs) -> +create_dat_files([{schema, schema, TabDef} | Tail], Ext, LocalTabs) -> ok = dets:insert(schema, {schema, schema, TabDef}), - create_dat_files(Tail, LocalTabs); -create_dat_files([{schema, Tab, TabDef} | Tail], LocalTabs) -> + create_dat_files(Tail, Ext, LocalTabs); +create_dat_files([{schema, Tab, TabDef} | Tail], Ext, LocalTabs) -> TmpFile = mnesia_lib:tab2tmp(Tab), DatFile = mnesia_lib:tab2dat(Tab), DclFile = mnesia_lib:tab2dcl(Tab), @@ -831,56 +849,21 @@ create_dat_files([{schema, Tab, TabDef} | Tail], LocalTabs) -> mnesia_lib:dets_sync_close(Tab), file:delete(TmpFile), - Cs = mnesia_schema:list2cs(TabDef), + Cs = mnesia_schema:list2cs(TabDef, Ext), ok = dets:insert(schema, {schema, Tab, TabDef}), RecName = Cs#cstruct.record_name, Storage = mnesia_lib:cs_to_storage_type(node(), Cs), + delete_ext(Storage, Tab), + Semantics = mnesia_lib:semantics(Storage, storage), if - Storage =:= unknown -> + Semantics =:= undefined -> ok = dets:delete(schema, {schema, Tab}), - create_dat_files(Tail, LocalTabs); - Storage =:= disc_only_copies -> - Args = [{file, TmpFile}, {keypos, 2}, - {type, mnesia_lib:disk_type(Tab, Cs#cstruct.type)}], - Open = fun(T, LT) when T =:= LT#local_tab.name -> - case mnesia_lib:dets_sync_open(T, Args) of - {ok, _} -> - ok; - {error, Reason} -> - throw({error, {"Cannot open file", T, Args, Reason}}) - end - end, - Add = fun(T, Key, Rec, LT) when T =:= LT#local_tab.name -> - case Rec of - {_T, Key} -> - ok = dets:delete(T, Key); - (Rec) when T =:= RecName -> - ok = dets:insert(Tab, Rec); - (Rec) -> - Rec2 = setelement(1, Rec, RecName), - ok = dets:insert(T, Rec2) - end - end, - Close = fun(T, LT) when T =:= LT#local_tab.name -> - mnesia_lib:dets_sync_close(T) - end, - Swap = fun(T, LT) when T =:= LT#local_tab.name -> - Expunge(), - case LT#local_tab.opened of - true -> - Close(T,LT); - false -> - Open(T,LT), - Close(T,LT) - end, - case file:rename(TmpFile, DatFile) of - ok -> - ok; - {error, Reason} -> - mnesia_lib:fatal("Cannot rename file ~p -> ~p: ~p~n", - [TmpFile, DatFile, Reason]) - end - end, + create_dat_files(Tail, Ext, LocalTabs); + Semantics =:= disc_only_copies -> + Open = disc_only_open_fun(Storage, Cs), + Add = disc_only_add_fun(Storage, Cs), + Close = disc_only_close_fun(Storage), + Swap = disc_only_swap_fun(Storage, Expunge, Open, Close), LocalTab = #local_tab{name = Tab, storage_type = Storage, open = Open, @@ -890,8 +873,8 @@ create_dat_files([{schema, Tab, TabDef} | Tail], LocalTabs) -> record_name = RecName, opened = false}, ?ets_insert(LocalTabs, LocalTab), - create_dat_files(Tail, LocalTabs); - Storage =:= ram_copies; Storage =:= disc_copies -> + create_dat_files(Tail, Ext, LocalTabs); + Semantics =:= ram_copies; Storage =:= disc_copies -> Open = fun(T, LT) when T =:= LT#local_tab.name -> mnesia_log:open_log({?MODULE, T}, mnesia_log:dcl_log_header(), @@ -952,18 +935,97 @@ create_dat_files([{schema, Tab, TabDef} | Tail], LocalTabs) -> opened = false }, ?ets_insert(LocalTabs, LocalTab), - create_dat_files(Tail, LocalTabs) + create_dat_files(Tail, Ext, LocalTabs); + true -> + error({unknown_semantics, [{semantics, Semantics}, + {tabdef, TabDef}, + {ext, Ext}]}) end; -create_dat_files([{schema, Tab} | Tail], LocalTabs) -> +create_dat_files([{schema, Tab} | Tail], Ext, LocalTabs) -> ?ets_delete(LocalTabs, Tab), ok = dets:delete(schema, {schema, Tab}), TmpFile = mnesia_lib:tab2tmp(Tab), mnesia_lib:dets_sync_close(Tab), file:delete(TmpFile), - create_dat_files(Tail, LocalTabs); -create_dat_files([], _LocalTabs) -> + create_dat_files(Tail, Ext, LocalTabs); +create_dat_files([], _Ext, _LocalTabs) -> ok. +delete_ext({ext, Alias, Mod}, Tab) -> + Mod:close_table(Alias, Tab), + Mod:delete_table(Alias, Tab), + ok; +delete_ext(_, _) -> + ok. + + +disc_only_open_fun(disc_only_copies, #cstruct{name = Tab} =Cs) -> + TmpFile = mnesia_lib:tab2tmp(Tab), + Args = [{file, TmpFile}, {keypos, 2}, + {type, mnesia_lib:disk_type(Tab, Cs#cstruct.type)}], + fun(T, LT) when T =:= LT#local_tab.name -> + case mnesia_lib:dets_sync_open(T, Args) of + {ok, _} -> + ok; + {error, Reason} -> + throw({error, {"Cannot open file", T, Args, Reason}}) + end + end; +disc_only_open_fun({ext,Alias,Mod}, Cs) -> + fun(T, LT) when T =:= LT#local_tab.name -> + ok = Mod:load_table(Alias, T, restore, mnesia_schema:cs2list(Cs)) + end. + +disc_only_add_fun(Storage, #cstruct{name = Tab, + record_name = RecName}) -> + fun(T, Key, Rec, #local_tab{name = T}) when T =:= Tab-> + case Rec of + {_T, Key} -> + ok = mnesia_lib:db_erase(Storage, T, Key); + (Rec) when T =:= RecName -> + ok = mnesia_lib:db_put(Storage, T, Rec); + (Rec) -> + ok = mnesia_lib:db_put(Storage, T, + setelement(1, Rec, RecName)) + end + end. + +disc_only_close_fun(disc_only_copies) -> + fun(T, LT) when T =:= LT#local_tab.name -> + mnesia_lib:dets_sync_close(T) + end; +disc_only_close_fun({ext, Alias, Mod}) -> + fun(T, _LT) -> + Mod:sync_close_table(Alias, T) + end. + + +disc_only_swap_fun(disc_only_copies, Expunge, Open, Close) -> + fun(T, LT) when T =:= LT#local_tab.name -> + TmpFile = mnesia_lib:tab2tmp(T), + DatFile = mnesia_lib:tab2dat(T), + Expunge(), + case LT#local_tab.opened of + true -> + Close(T,LT); + false -> + Open(T,LT), + Close(T,LT) + end, + case file:rename(TmpFile, DatFile) of + ok -> + ok; + {error, Reason} -> + mnesia_lib:fatal("Cannot rename file ~p -> ~p: ~p~n", + [TmpFile, DatFile, Reason]) + end + end; +disc_only_swap_fun({ext, _Alias, _Mod}, _Expunge, _Open, Close) -> + fun(T, #local_tab{name = T} = LT) -> + Close(T, LT) + end. + + uninstall_fallback() -> uninstall_fallback([{scope, global}]). @@ -1140,7 +1202,7 @@ do_traverse_backup(ClientPid, Source, SourceMod, Target, TargetMod, Fun, Acc) -> end, A = {start, Fun, Acc, TargetMod, Iter}, Res = - case iterate(SourceMod, fun trav_apply/4, Source, A) of + case iterate(SourceMod, fun trav_apply/5, Source, A) of {ok, {iter, _, Acc2, _, Iter2}} when TargetMod =/= read_only -> try do_apply(TargetMod, commit_write, [Iter2], Iter2), @@ -1159,7 +1221,7 @@ do_traverse_backup(ClientPid, Source, SourceMod, Target, TargetMod, Fun, Acc) -> unlink(ClientPid), ClientPid ! {iter_done, self(), Res}. -trav_apply(Recs, _Header, _Schema, {iter, Fun, Acc, Mod, Iter}) -> +trav_apply(Recs, _Header, _Schema, _Ext, {iter, Fun, Acc, Mod, Iter}) -> {NewRecs, Acc2} = filter_foldl(Fun, Acc, Recs), if Mod =/= read_only, NewRecs =/= [] -> @@ -1168,7 +1230,7 @@ trav_apply(Recs, _Header, _Schema, {iter, Fun, Acc, Mod, Iter}) -> true -> {iter, Fun, Acc2, Mod, Iter} end; -trav_apply(Recs, Header, Schema, {start, Fun, Acc, Mod, Iter}) -> +trav_apply(Recs, Header, Schema, Ext, {start, Fun, Acc, Mod, Iter}) -> Iter2 = if Mod =/= read_only -> @@ -1176,8 +1238,9 @@ trav_apply(Recs, Header, Schema, {start, Fun, Acc, Mod, Iter}) -> true -> Iter end, - TravAcc = trav_apply(Schema, Header, Schema, {iter, Fun, Acc, Mod, Iter2}), - trav_apply(Recs, Header, Schema, TravAcc). + TravAcc = trav_apply(Schema, Header, Schema, Ext, + {iter, Fun, Acc, Mod, Iter2}), + trav_apply(Recs, Header, Schema, Ext, TravAcc). filter_foldl(Fun, Acc, [Head|Tail]) -> case Fun(Head, Acc) of |