mirror of
https://github.com/processone/ejabberd.git
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Separate db backend from the SM
This commit is contained in:
Evgeniy Khramtsov
parent
db9a400279
commit
86e03f3828
@ -73,11 +73,18 @@
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-include("jlib.hrl").
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-include("ejabberd_commands.hrl").
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-include_lib("stdlib/include/ms_transform.hrl").
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-include("mod_privacy.hrl").
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-include("ejabberd_sm.hrl").
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-callback init() -> ok | {error, any()}.
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-callback get_session(sid()) -> {ok, #session{}} | {error, notfound}.
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-callback set_session(#session{}) -> ok.
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-callback delete_session(sid()) -> ok.
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-callback get_sessions() -> [#session{}].
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-callback get_sessions(binary()) -> [#session{}].
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-callback get_sessions(binary(), binary()) -> [#session{}].
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-callback get_sessions(binary(), binary(), binary()) -> [#session{}].
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-record(session, {sid, usr, us, priority, info}).
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-record(session_counter, {vhost, count}).
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-record(state, {}).
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%% default value for the maximum number of user connections
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@ -90,12 +97,6 @@
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%% Function: start_link() -> {ok,Pid} | ignore | {error,Error}
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%% Description: Starts the server
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%%--------------------------------------------------------------------
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-type sid() :: {erlang:timestamp(), pid()}.
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-type ip() :: {inet:ip_address(), inet:port_number()} | undefined.
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-type info() :: [{conn, atom()} | {ip, ip()} | {node, atom()}
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| {oor, boolean()} | {auth_module, atom()}].
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-type prio() :: undefined | integer().
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-export_type([sid/0]).
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start_link() ->
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@ -116,8 +117,6 @@ route(From, To, Packet) ->
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open_session(SID, User, Server, Resource, Priority, Info) ->
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set_session(SID, User, Server, Resource, Priority, Info),
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mnesia:dirty_update_counter(session_counter,
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jlib:nameprep(Server), 1),
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check_for_sessions_to_replace(User, Server, Resource),
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JID = jlib:make_jid(User, Server, Resource),
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ejabberd_hooks:run(sm_register_connection_hook,
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@ -131,16 +130,12 @@ open_session(SID, User, Server, Resource, Info) ->
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-spec close_session(sid(), binary(), binary(), binary()) -> ok.
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close_session(SID, User, Server, Resource) ->
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Info = case mnesia:dirty_read({session, SID}) of
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[] -> [];
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[#session{info=I}] -> I
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end,
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F = fun() ->
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mnesia:delete({session, SID}),
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mnesia:dirty_update_counter(session_counter,
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jlib:nameprep(Server), -1)
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end,
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mnesia:sync_dirty(F),
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Mod = get_sm_backend(),
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Info = case Mod:get_session(SID) of
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{ok, #session{info = I}} -> I;
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{error, notfound} -> []
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end,
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Mod:delete_session(SID),
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JID = jlib:make_jid(User, Server, Resource),
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ejabberd_hooks:run(sm_remove_connection_hook,
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JID#jid.lserver, [SID, JID, Info]).
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@ -169,27 +164,17 @@ disconnect_removed_user(User, Server) ->
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get_user_resources(User, Server) ->
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LUser = jlib:nodeprep(User),
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LServer = jlib:nameprep(Server),
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US = {LUser, LServer},
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case catch mnesia:dirty_index_read(session, US, #session.us) of
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{'EXIT', _Reason} ->
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[];
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Ss ->
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[element(3, S#session.usr) || S <- clean_session_list(Ss)]
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end.
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Mod = get_sm_backend(),
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Ss = Mod:get_sessions(LUser, LServer),
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[element(3, S#session.usr) || S <- clean_session_list(Ss)].
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-spec get_user_present_resources(binary(), binary()) -> [tuple()].
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get_user_present_resources(LUser, LServer) ->
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US = {LUser, LServer},
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case catch mnesia:dirty_index_read(session, US,
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#session.us)
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of
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{'EXIT', _Reason} -> [];
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Ss ->
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[{S#session.priority, element(3, S#session.usr)}
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|| S <- clean_session_list(Ss),
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is_integer(S#session.priority)]
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end.
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Mod = get_sm_backend(),
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Ss = Mod:get_sessions(LUser, LServer),
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[{S#session.priority, element(3, S#session.usr)}
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|| S <- clean_session_list(Ss), is_integer(S#session.priority)].
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-spec get_user_ip(binary(), binary(), binary()) -> ip().
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@ -197,8 +182,8 @@ get_user_ip(User, Server, Resource) ->
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LUser = jlib:nodeprep(User),
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LServer = jlib:nameprep(Server),
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LResource = jlib:resourceprep(Resource),
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USR = {LUser, LServer, LResource},
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case mnesia:dirty_index_read(session, USR, #session.usr) of
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Mod = get_sm_backend(),
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case Mod:get_sessions(LUser, LServer, LResource) of
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[] ->
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undefined;
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Ss ->
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@ -212,8 +197,8 @@ get_user_info(User, Server, Resource) ->
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LUser = jlib:nodeprep(User),
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LServer = jlib:nameprep(Server),
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LResource = jlib:resourceprep(Resource),
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USR = {LUser, LServer, LResource},
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case mnesia:dirty_index_read(session, USR, #session.usr) of
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Mod = get_sm_backend(),
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case Mod:get_sessions(LUser, LServer, LResource) of
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[] ->
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offline;
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Ss ->
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@ -262,8 +247,8 @@ get_session_pid(User, Server, Resource) ->
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LUser = jlib:nodeprep(User),
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LServer = jlib:nameprep(Server),
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LResource = jlib:resourceprep(Resource),
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USR = {LUser, LServer, LResource},
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case catch mnesia:dirty_index_read(session, USR, #session.usr) of
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Mod = get_sm_backend(),
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case Mod:get_sessions(LUser, LServer, LResource) of
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[#session{sid = {_, Pid}}] -> Pid;
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_ -> none
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end.
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@ -271,49 +256,30 @@ get_session_pid(User, Server, Resource) ->
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-spec dirty_get_sessions_list() -> [ljid()].
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dirty_get_sessions_list() ->
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mnesia:dirty_select(
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session,
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[{#session{usr = '$1', _ = '_'},
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[],
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['$1']}]).
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Mod = get_sm_backend(),
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[S#session.usr || S <- Mod:get_sessions()].
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dirty_get_my_sessions_list() ->
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mnesia:dirty_select(
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session,
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[{#session{sid = {'_', '$1'}, _ = '_'},
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[{'==', {node, '$1'}, node()}],
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['$_']}]).
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Mod = get_sm_backend(),
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[S || S <- Mod:get_sessions(), node(element(2, S#session.sid)) == node()].
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-spec get_vh_session_list(binary()) -> [ljid()].
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get_vh_session_list(Server) ->
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LServer = jlib:nameprep(Server),
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mnesia:dirty_select(session,
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[{#session{usr = '$1', _ = '_'},
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[{'==', {element, 2, '$1'}, LServer}], ['$1']}]).
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Mod = get_sm_backend(),
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[S#session.usr || S <- Mod:get_sessions(LServer)].
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-spec get_all_pids() -> [pid()].
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get_all_pids() ->
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mnesia:dirty_select(
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session,
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ets:fun2ms(
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fun(#session{sid = {_, Pid}}) ->
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Pid
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end)).
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Mod = get_sm_backend(),
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[element(2, S#session.sid) || S <- Mod:get_sessions()].
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get_vh_session_number(Server) ->
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LServer = jlib:nameprep(Server),
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Query = mnesia:dirty_select(
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session_counter,
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[{#session_counter{vhost = LServer, count = '$1'},
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[],
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['$1']}]),
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case Query of
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[Count] ->
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Count;
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_ -> 0
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end.
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Mod = get_sm_backend(),
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length(Mod:get_sessions(LServer)).
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register_iq_handler(Host, XMLNS, Module, Fun) ->
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ejabberd_sm !
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@ -343,18 +309,8 @@ unregister_iq_handler(Host, XMLNS) ->
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%% Description: Initiates the server
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%%--------------------------------------------------------------------
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init([]) ->
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update_tables(),
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mnesia:create_table(session,
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[{ram_copies, [node()]},
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{attributes, record_info(fields, session)}]),
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mnesia:create_table(session_counter,
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[{ram_copies, [node()]},
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{attributes, record_info(fields, session_counter)}]),
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mnesia:add_table_index(session, usr),
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mnesia:add_table_index(session, us),
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mnesia:add_table_copy(session, node(), ram_copies),
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mnesia:add_table_copy(session_counter, node(), ram_copies),
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mnesia:subscribe(system),
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Mod = get_sm_backend(),
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Mod:init(),
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ets:new(sm_iqtable, [named_table]),
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lists:foreach(
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fun(Host) ->
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@ -366,7 +322,6 @@ init([]) ->
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ejabberd_sm, disconnect_removed_user, 100)
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end, ?MYHOSTS),
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ejabberd_commands:register_commands(commands()),
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{ok, #state{}}.
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%%--------------------------------------------------------------------
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@ -404,9 +359,6 @@ handle_info({route, From, To, Packet}, State) ->
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ok
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end,
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{noreply, State};
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handle_info({mnesia_system_event, {mnesia_down, Node}}, State) ->
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recount_session_table(Node),
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{noreply, State};
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handle_info({register_iq_handler, Host, XMLNS, Module, Function}, State) ->
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ets:insert(sm_iqtable, {{XMLNS, Host}, Module, Function}),
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{noreply, State};
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@ -454,38 +406,9 @@ set_session(SID, User, Server, Resource, Priority, Info) ->
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LResource = jlib:resourceprep(Resource),
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US = {LUser, LServer},
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USR = {LUser, LServer, LResource},
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F = fun () ->
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mnesia:write(#session{sid = SID, usr = USR, us = US,
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priority = Priority, info = Info})
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end,
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mnesia:sync_dirty(F).
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%% Recalculates alive sessions when Node goes down
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%% and updates session and session_counter tables
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recount_session_table(Node) ->
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F = fun() ->
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Es = mnesia:select(
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session,
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[{#session{sid = {'_', '$1'}, _ = '_'},
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[{'==', {node, '$1'}, Node}],
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['$_']}]),
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lists:foreach(fun(E) ->
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mnesia:delete({session, E#session.sid})
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end, Es),
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%% reset session_counter table with active sessions
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mnesia:clear_table(session_counter),
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lists:foreach(fun(Server) ->
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LServer = jlib:nameprep(Server),
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Hs = mnesia:select(session,
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[{#session{usr = '$1', _ = '_'},
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[{'==', {element, 2, '$1'}, LServer}],
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['$1']}]),
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mnesia:write(
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#session_counter{vhost = LServer,
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count = length(Hs)})
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end, ?MYHOSTS)
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end,
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mnesia:async_dirty(F).
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Mod = get_sm_backend(),
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Mod:set_session(#session{sid = SID, usr = USR, us = US,
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priority = Priority, info = Info}).
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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@ -499,8 +422,9 @@ do_route(From, To, {broadcast, _} = Packet) ->
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end,
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get_user_resources(To#jid.user, To#jid.server));
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_ ->
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USR = jlib:jid_tolower(To),
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case mnesia:dirty_index_read(session, USR, #session.usr) of
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{U, S, R} = jlib:jid_tolower(To),
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Mod = get_sm_backend(),
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case Mod:get_sessions(U, S, R) of
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[] ->
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?DEBUG("packet dropped~n", []);
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Ss ->
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@ -589,9 +513,8 @@ do_route(From, To, #xmlel{} = Packet) ->
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_ -> ok
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end;
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_ ->
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USR = {LUser, LServer, LResource},
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case mnesia:dirty_index_read(session, USR, #session.usr)
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of
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Mod = get_sm_backend(),
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case Mod:get_sessions(LUser, LServer, LResource) of
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[] ->
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case Name of
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<<"message">> -> route_message(From, To, Packet);
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@ -646,10 +569,9 @@ route_message(From, To, Packet) ->
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when is_integer(Priority), Priority >= 0 ->
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lists:foreach(fun ({P, R}) when P == Priority ->
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LResource = jlib:resourceprep(R),
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USR = {LUser, LServer, LResource},
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case mnesia:dirty_index_read(session, USR,
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#session.usr)
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of
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Mod = get_sm_backend(),
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case Mod:get_sessions(LUser, LServer,
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LResource) of
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[] ->
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ok; % Race condition
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Ss ->
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@ -730,17 +652,15 @@ is_existing_resource(LUser, LServer, LResource) ->
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[] /= get_resource_sessions(LUser, LServer, LResource).
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get_resource_sessions(User, Server, Resource) ->
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USR = {jlib:nodeprep(User), jlib:nameprep(Server),
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jlib:resourceprep(Resource)},
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mnesia:dirty_select(session,
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[{#session{sid = '$1', usr = USR, _ = '_'}, [],
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['$1']}]).
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LUser = jlib:nodeprep(User),
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LServer = jlib:nameprep(Server),
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LResource = jlib:resourceprep(Resource),
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Mod = get_sm_backend(),
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[S#session.sid || S <- Mod:get_sessions(LUser, LServer, LResource)].
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check_max_sessions(LUser, LServer) ->
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SIDs = mnesia:dirty_select(session,
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[{#session{sid = '$1', us = {LUser, LServer},
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_ = '_'},
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[], ['$1']}]),
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Mod = get_sm_backend(),
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SIDs = [S#session.sid || S <- Mod:get_sessions(LUser, LServer)],
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MaxSessions = get_max_user_sessions(LUser, LServer),
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if length(SIDs) =< MaxSessions -> ok;
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true -> {_, Pid} = lists:min(SIDs), Pid ! replaced
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@ -790,17 +710,22 @@ process_iq(From, To, Packet) ->
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-spec force_update_presence({binary(), binary()}) -> any().
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force_update_presence({LUser, _LServer} = US) ->
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case catch mnesia:dirty_index_read(session, US,
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#session.us)
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of
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{'EXIT', _Reason} -> ok;
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Ss ->
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lists:foreach(fun (#session{sid = {_, Pid}}) ->
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Pid ! {force_update_presence, LUser}
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end,
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Ss)
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end.
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force_update_presence({LUser, LServer}) ->
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Mod = get_sm_backend(),
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Ss = Mod:get_sessions(LUser, LServer),
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lists:foreach(fun (#session{sid = {_, Pid}}) ->
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Pid ! {force_update_presence, LUser}
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end,
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Ss).
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-spec get_sm_backend() -> module().
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get_sm_backend() ->
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DBType = ejabberd_config:get_option(sm_db_type,
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fun(mnesia) -> mnesia;
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(internal) -> mnesia
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end, mnesia),
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list_to_atom("ejabberd_sm_" ++ atom_to_list(DBType)).
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%%% ejabberd commands
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@ -852,29 +777,3 @@ kick_user(User, Server) ->
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PID ! kick
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end, Resources),
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length(Resources).
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%%% Update Mnesia tables
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update_tables() ->
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case catch mnesia:table_info(session, attributes) of
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[ur, user, node] -> mnesia:delete_table(session);
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[ur, user, pid] -> mnesia:delete_table(session);
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[usr, us, pid] -> mnesia:delete_table(session);
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[usr, us, sid, priority, info] -> mnesia:delete_table(session);
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[sid, usr, us, priority] ->
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mnesia:delete_table(session);
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[sid, usr, us, priority, info] -> ok;
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{'EXIT', _} -> ok
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end,
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case lists:member(presence, mnesia:system_info(tables))
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of
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true -> mnesia:delete_table(presence);
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false -> ok
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end,
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case lists:member(local_session, mnesia:system_info(tables)) of
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true ->
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mnesia:delete_table(local_session);
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false ->
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ok
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end.
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148
src/ejabberd_sm_mnesia.erl
Normal file
148
src/ejabberd_sm_mnesia.erl
Normal file
@ -0,0 +1,148 @@
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%%%-------------------------------------------------------------------
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%%% @author Evgeny Khramtsov <ekhramtsov@process-one.net>
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%%% @copyright (C) 2015, Evgeny Khramtsov
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%%% @doc
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%%%
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%%% @end
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%%% Created : 9 Mar 2015 by Evgeny Khramtsov <ekhramtsov@process-one.net>
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%%%-------------------------------------------------------------------
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-module(ejabberd_sm_mnesia).
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-behaviour(gen_server).
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-behaviour(ejabberd_sm).
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%% API
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-export([init/0,
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get_session/1,
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set_session/1,
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delete_session/1,
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get_sessions/0,
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get_sessions/1,
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get_sessions/2,
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get_sessions/3]).
|
||||
|
||||
%% gen_server callbacks
|
||||
-export([init/1, handle_call/3, handle_cast/2, handle_info/2,
|
||||
terminate/2, code_change/3]).
|
||||
|
||||
-include("ejabberd.hrl").
|
||||
-include("ejabberd_sm.hrl").
|
||||
-include("jlib.hrl").
|
||||
-include_lib("stdlib/include/ms_transform.hrl").
|
||||
|
||||
-record(state, {}).
|
||||
|
||||
%%%===================================================================
|
||||
%%% API
|
||||
%%%===================================================================
|
||||
-spec init() -> ok | {error, any()}.
|
||||
init() ->
|
||||
case gen_server:start_link({local, ?MODULE}, ?MODULE, [], []) of
|
||||
{ok, _Pid} ->
|
||||
ok;
|
||||
Err ->
|
||||
Err
|
||||
end.
|
||||
|
||||
-spec get_session(sid()) -> {ok, #session{}} | {error, notfound}.
|
||||
get_session(SID) ->
|
||||
case mnesia:dirty_read(session, SID) of
|
||||
[] ->
|
||||
{error, notfound};
|
||||
[Session] ->
|
||||
{ok, Session}
|
||||
end.
|
||||
|
||||
-spec set_session(#session{}) -> ok.
|
||||
set_session(Session) ->
|
||||
mnesia:dirty_write(Session).
|
||||
|
||||
-spec delete_session(sid()) -> ok.
|
||||
delete_session(SID) ->
|
||||
mnesia:dirty_delete(session, SID).
|
||||
|
||||
-spec get_sessions() -> [#session{}].
|
||||
get_sessions() ->
|
||||
ets:tab2list(session).
|
||||
|
||||
-spec get_sessions(binary()) -> [#session{}].
|
||||
get_sessions(LServer) ->
|
||||
mnesia:dirty_select(session,
|
||||
[{#session{usr = '$1', _ = '_'},
|
||||
[{'==', {element, 2, '$1'}, LServer}], ['$_']}]).
|
||||
|
||||
-spec get_sessions(binary(), binary()) -> [#session{}].
|
||||
get_sessions(LUser, LServer) ->
|
||||
mnesia:dirty_index_read(session, {LUser, LServer}, #session.us).
|
||||
|
||||
-spec get_sessions(binary(), binary(), binary()) -> [#session{}].
|
||||
get_sessions(LUser, LServer, LResource) ->
|
||||
mnesia:dirty_index_read(session, {LUser, LServer, LResource}, #session.usr).
|
||||
|
||||
%%%===================================================================
|
||||
%%% gen_server callbacks
|
||||
%%%===================================================================
|
||||
init([]) ->
|
||||
update_tables(),
|
||||
mnesia:create_table(session,
|
||||
[{ram_copies, [node()]},
|
||||
{attributes, record_info(fields, session)}]),
|
||||
mnesia:create_table(session_counter,
|
||||
[{ram_copies, [node()]},
|
||||
{attributes, record_info(fields, session_counter)}]),
|
||||
mnesia:add_table_index(session, usr),
|
||||
mnesia:add_table_index(session, us),
|
||||
mnesia:add_table_copy(session, node(), ram_copies),
|
||||
mnesia:add_table_copy(session_counter, node(), ram_copies),
|
||||
mnesia:subscribe(system),
|
||||
{ok, #state{}}.
|
||||
|
||||
handle_call(_Request, _From, State) ->
|
||||
Reply = ok,
|
||||
{reply, Reply, State}.
|
||||
|
||||
handle_cast(_Msg, State) ->
|
||||
{noreply, State}.
|
||||
|
||||
handle_info({mnesia_system_event, {mnesia_down, Node}}, State) ->
|
||||
ets:select_delete(
|
||||
session,
|
||||
ets:fun2ms(
|
||||
fun(#session{sid = {_, Pid}}) ->
|
||||
node(Pid) == Node
|
||||
end)),
|
||||
{noreply, State};
|
||||
handle_info(_Info, State) ->
|
||||
{noreply, State}.
|
||||
|
||||
terminate(_Reason, _State) ->
|
||||
ok.
|
||||
|
||||
code_change(_OldVsn, State, _Extra) ->
|
||||
{ok, State}.
|
||||
|
||||
%%%===================================================================
|
||||
%%% Internal functions
|
||||
%%%===================================================================
|
||||
update_tables() ->
|
||||
case catch mnesia:table_info(session, attributes) of
|
||||
[ur, user, node] -> mnesia:delete_table(session);
|
||||
[ur, user, pid] -> mnesia:delete_table(session);
|
||||
[usr, us, pid] -> mnesia:delete_table(session);
|
||||
[usr, us, sid, priority, info] -> mnesia:delete_table(session);
|
||||
[sid, usr, us, priority] ->
|
||||
mnesia:delete_table(session);
|
||||
[sid, usr, us, priority, info] -> ok;
|
||||
{'EXIT', _} -> ok
|
||||
end,
|
||||
case lists:member(presence, mnesia:system_info(tables))
|
||||
of
|
||||
true -> mnesia:delete_table(presence);
|
||||
false -> ok
|
||||
end,
|
||||
case lists:member(local_session, mnesia:system_info(tables)) of
|
||||
true ->
|
||||
mnesia:delete_table(local_session);
|
||||
false ->
|
||||
ok
|
||||
end.
|
||||
Loading…
Reference in New Issue
Block a user