From 31b06641f692641f82c489069584220609e1e840 Mon Sep 17 00:00:00 2001 From: Micael Karlberg Date: Tue, 21 May 2013 11:17:44 +0200 Subject: [snmp/agent] backup --- lib/snmp/doc/src/snmp_app.xml | 48 ++-- lib/snmp/src/agent/depend.mk | 12 + lib/snmp/src/agent/modules.mk | 4 + lib/snmp/src/agent/snmpa_mib_storage.erl | 181 ++++++++++++++ lib/snmp/src/agent/snmpa_mib_storage_dets.erl | 298 ++++++++++++++++++++++++ lib/snmp/src/agent/snmpa_mib_storage_ets.erl | 298 ++++++++++++++++++++++++ lib/snmp/src/agent/snmpa_mib_storage_mnesia.erl | 265 +++++++++++++++++++++ lib/snmp/src/agent/snmpa_supervisor.erl | 103 ++++++-- 8 files changed, 1172 insertions(+), 37 deletions(-) create mode 100644 lib/snmp/src/agent/snmpa_mib_storage.erl create mode 100644 lib/snmp/src/agent/snmpa_mib_storage_dets.erl create mode 100644 lib/snmp/src/agent/snmpa_mib_storage_ets.erl create mode 100644 lib/snmp/src/agent/snmpa_mib_storage_mnesia.erl (limited to 'lib') diff --git a/lib/snmp/doc/src/snmp_app.xml b/lib/snmp/doc/src/snmp_app.xml index c7a74f0ca6..9cdbcc91c5 100644 --- a/lib/snmp/doc/src/snmp_app.xml +++ b/lib/snmp/doc/src/snmp_app.xml @@ -312,29 +312,31 @@ - ]]> - -

Specifies how info retrieved from the mibs will be stored.

-

If mib_storage is {ets, Dir}, the table will also be - stored on file. If Dir is default, then db_dir - will be used.

-

If mib_storage is dets or if Dir is - default, then db_dir will be used for Dir.

-

If mib_storage is mnesia then erlang:nodes() - will be used for Nodes.

-

Default is ets.

-

Dir = default | string(). Dir is the directory where the - files will be stored. If default, then db_dir will be - used.

-

Nodes = visible | connected | [node()]. - Nodes = visible is translated to - erlang:nodes(visible). - Nodes = connected is translated to - erlang:nodes(connected). - If Nodes = [] then the own node is assumed.

-

Action = clear | keep. Default is keep. - Action is used to specify what shall be done if the - mnesia/dets table already exist.

+ + +

mib_storage_opt() = {module, mib_storage_module()} | {options, list()}

+

This option specifies how basic mib data is stored. + This option is used by two parts of the snmp agent: + The mib-server and the symbolic-store.

+

Default is [{module, snmpa_mib_storage_ets}].

+ + + + ]]> + +

Defines the callback mib data storage module of the + SNMP agent mib-server as defined by the + snmpa_mib_data + behaviour.

+

At present only the default module is provided with the agent, + snmpa_mib_data_tttn.

+ +

Default module is snmpa_mib_data_tttn.

diff --git a/lib/snmp/src/agent/depend.mk b/lib/snmp/src/agent/depend.mk index 096182a626..283de54078 100644 --- a/lib/snmp/src/agent/depend.mk +++ b/lib/snmp/src/agent/depend.mk @@ -88,6 +88,18 @@ $(EBIN)/snmpa_local_db.$(EMULATOR): \ ../../include/snmp_types.hrl \ ../../include/STANDARD-MIB.hrl +$(EBIN)/snmpa_mib_storage.$(EMULATOR): \ + snmpa_mib_storage.erl + +$(EBIN)/snmpa_mib_storage_ets.$(EMULATOR): \ + snmpa_mib_storage_ets.erl + +$(EBIN)/snmpa_mib_storage_dets.$(EMULATOR): \ + snmpa_mib_storage_dets.erl + +$(EBIN)/snmpa_mib_storage_mnesia.$(EMULATOR): \ + snmpa_mib_storage_mnesia.erl + $(EBIN)/snmpa_mib.$(EMULATOR): \ snmpa_mib.erl \ ../misc/snmp_debug.hrl \ diff --git a/lib/snmp/src/agent/modules.mk b/lib/snmp/src/agent/modules.mk index da9f6d6b4c..e8d1593a79 100644 --- a/lib/snmp/src/agent/modules.mk +++ b/lib/snmp/src/agent/modules.mk @@ -21,6 +21,7 @@ BEHAVIOUR_MODULES = \ snmpa_authentication_service \ snmpa_discovery_handler \ snmpa_error_report \ + snmpa_mib_storage \ snmpa_mib_data \ snmpa_network_interface \ snmpa_network_interface_filter \ @@ -45,6 +46,9 @@ MODULES = \ snmpa_error_logger \ snmpa_general_db \ snmpa_local_db \ + snmpa_mib_storage_ets \ + snmpa_mib_storage_dets \ + snmpa_mib_storage_mnesia \ snmpa_mib \ snmpa_mib_data_tttn \ snmpa_mib_lib \ diff --git a/lib/snmp/src/agent/snmpa_mib_storage.erl b/lib/snmp/src/agent/snmpa_mib_storage.erl new file mode 100644 index 0000000000..bbb9516ecb --- /dev/null +++ b/lib/snmp/src/agent/snmpa_mib_storage.erl @@ -0,0 +1,181 @@ +%% +%% %CopyrightBegin% +%% +%% Copyright Ericsson AB 2013-2013. All Rights Reserved. +%% +%% The contents of this file are subject to the Erlang Public License, +%% Version 1.1, (the "License"); you may not use this file except in +%% compliance with the License. You should have received a copy of the +%% Erlang Public License along with this software. If not, it can be +%% retrieved online at http://www.erlang.org/. +%% +%% Software distributed under the License is distributed on an "AS IS" +%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See +%% the License for the specific language governing rights and limitations +%% under the License. +%% +%% %CopyrightEnd% +%% + +-module(snmpa_mib_storage). + +-export_type([ + mib_storage_fields/0, + mib_storage_table_type/0, + mib_storage_table_id/0, + + void/0 + ]). + + +%%% ---------------------------------------------------------------- +%%% This behaviour module defines the API for the mib-storage. +%%% This is how the agent stores its internal mib-data +%%% (symbolic-store and mib-server). +%%%----------------------------------------------------------------- + +-type mib_storage_fields() :: [atom()]. +-type mib_storage_table_type() :: set | bag. +-type mib_storage_table_id() :: term(). +-type void() :: term(). + + +%% --------------------------------------------------------------- +%% open +%% +%% Open or create a mib-storage table. +%% If any extra info needs to be communicated to the implementor +%% (of the behaviour), this is done using the *Options* argument. +%% --------------------------------------------------------------- + +%% Options is callback module dependant + +-callback open(Name :: atom(), + RecName :: atom(), + Fields :: mib_storage_fields(), + Type :: mib_storage_table_type(), + Options :: list()) -> + {ok, TabId :: mib_storage_table_id()} | {error, Reason :: term()}. + + +%% --------------------------------------------------------------- +%% close +%% +%% Close the mib-storage table. What this does is up to the +%% implementor (when using mnesia it may be a no-op but for ets +%% it may actually delete the table). +%% --------------------------------------------------------------- + +-callback close(TabId :: mib_storage_table_id()) -> + term(). + + +%% --------------------------------------------------------------- +%% read/2 +%% +%% Retrieve a record from the mib-storage table. +%% --------------------------------------------------------------- + +-callback read(TabId :: mib_storage_table_id(), + Key :: term()) -> + false | {value, Record :: tuple()}. + + +%% --------------------------------------------------------------- +%% write/2 +%% +%% Write a record to the mib-storage table. +%% --------------------------------------------------------------- + +-callback write(TabId :: mib_storage_table_id(), + Record :: tuple()) -> + ok | {error, Reason :: term()}. + + +%% --------------------------------------------------------------- +%% delete/1 +%% +%% Delete the mib-storage table. +%% --------------------------------------------------------------- + +-callback delete(TabId :: mib_storage_table_id()) -> + void(). + + +%% --------------------------------------------------------------- +%% delete/2 +%% +%% Delete a record from the mib-storage table. +%% --------------------------------------------------------------- + +-callback delete(TabId :: mib_storage_table_id(), + Key :: term()) -> + ok | {error, Reason :: term()}. + + +%% --------------------------------------------------------------- +%% match_object +%% +%% Search the mib-storage table for records which matches +%% the pattern. +%% --------------------------------------------------------------- + +-callback match_object(TabId :: mib_storage_table_id(), + Pattern :: ets:match_pattern()) -> + {ok, Recs :: [tuple()]} | {error, Reason :: term()}. + + +%% --------------------------------------------------------------- +%% match_delete +%% +%% Search the mib-storage table for records which matches the +%% pattern and deletes them from the database and return the +%5 deleted records. +%% --------------------------------------------------------------- + +-callback match_delete(TabId :: mib_storage_table_id(), + Pattern :: ets:match_pattern()) -> + {ok, Recs :: [tuple()]} | {error, Reason :: term()}. + + +%% --------------------------------------------------------------- +%% tab2list +%% +%% Return all records in the table in the form of a list. +%% --------------------------------------------------------------- + +-callback tab2list(TabId :: mib_storage_table_id()) -> + [tuple()]. + + +%% --------------------------------------------------------------- +%% info +%% +%% Retrieve implementation dependent mib-storage table +%% information. +%% --------------------------------------------------------------- + +-callback info(TabId :: mib_storage_table_id()) -> + {ok, Info :: term()} | {error, Reason :: term()}. + + +%% --------------------------------------------------------------- +%% sync +%% +%% Dump mib-storage table to disc (if it has a disk component). +%% --------------------------------------------------------------- + +-callback sync(TabId :: mib_storage_table_id()) -> + ok. + + +%% --------------------------------------------------------------- +%% backup +%% +%% Make a backup copy of the mib-storage table. +%% --------------------------------------------------------------- + +-callback backup(TabId :: mib_storage_table_id(), + Dir :: file:filename()) -> + ok | {error, Reason :: term()}. + diff --git a/lib/snmp/src/agent/snmpa_mib_storage_dets.erl b/lib/snmp/src/agent/snmpa_mib_storage_dets.erl new file mode 100644 index 0000000000..6062f4327e --- /dev/null +++ b/lib/snmp/src/agent/snmpa_mib_storage_dets.erl @@ -0,0 +1,298 @@ +%% +%% %CopyrightBegin% +%% +%% Copyright Ericsson AB 2013-2013. All Rights Reserved. +%% +%% The contents of this file are subject to the Erlang Public License, +%% Version 1.1, (the "License"); you may not use this file except in +%% compliance with the License. You should have received a copy of the +%% Erlang Public License along with this software. If not, it can be +%% retrieved online at http://www.erlang.org/. +%% +%% Software distributed under the License is distributed on an "AS IS" +%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See +%% the License for the specific language governing rights and limitations +%% under the License. +%% +%% %CopyrightEnd% +%% +-module(snmpa_mib_storage_dets). + +-behaviour(snmpa_mib_storage). + + +%%%----------------------------------------------------------------- +%%% This module implements the snmpa_mib_storage behaviour. +%%% It uses dets for storage. +%%%----------------------------------------------------------------- + +-export([ + open/5, + close/1, + read/2, + write/2, + delete/1, + delete/2, + sync/1, + backup/2, + match_object/2, + match_delete/2, + tab2list/1, + info/1 + ]). + + +-define(VMODULE, "MS-DETS"). +-include("snmp_verbosity.hrl"). + +-record(tab, {id}). + + +%% --------------------------------------------------------------- +%% open +%% +%% Open or create a mib-storage (dets) table. +%% +%% Opts - A list of implementation dependent options +%% dets_open_options() = [dets_open_option()] +%% dets_open_option() = {dir, filename()} | +%% {action, keep | clear} | +%% {auto_save, default | pos_integer()} | +%% {repair, force | boolean()} +%% +%% --------------------------------------------------------------- + +open(Name, _RecName, _Fields, Type, Opts) -> + Dir = snmp_misc:get_option(dir, Opts), + Action = snmp_misc:get_option(action, Opts, keep), + AutoSave = snmp_misc:get_option(auto_save, Opts, default), + Repair = snmp_misc:get_option(repair, Opts, false), + File = dets_filename(Name, Dir), + OpenOpts = [{file, File}, + {type, Type}, + {keypos, 2}, + {repair, Repair}] ++ + case AutoSave of + default -> + []; + _ -> + [{auto_save, AutoSave}] + end, + case dets:open_file(Name, OpenOpts) of + {ok, ID} when (Action =:= keep) -> + {ok, #tab{id = ID}}; + {ok, ID} when (Action =:= clear) -> + dets:match_delete(ID, '_'), + {ok, #tab{id = ID}}; + {error, Reason} -> + {error, {dets_open, Reason}} + end. + +dets_filename(Name, Dir) -> + Dir1 = dets_filename1(Dir), + Dir2 = string:strip(Dir1, right, $/), + io_lib:format("~s/~p.dat", [Dir2, Name]). + +dets_filename1([]) -> "."; +dets_filename1(Dir) -> Dir. + + +%% --------------------------------------------------------------- +%% close +%% +%% Close the table. +%% --------------------------------------------------------------- + +close(#tab{id = ID}) -> + ?vtrace("close database ~p", [ID]), + dets:close(ID). + + +%% --------------------------------------------------------------- +%% read +%% +%% Retrieve a record from the database table. +%% --------------------------------------------------------------- + +read(#tab{id = ID}, Key) -> + ?vtrace("read from table ~p: ~p", [ID, Key]), + case dets:lookup(ID, Key) of + [Rec|_] -> {value, Rec}; + _ -> false + end. + + +%% --------------------------------------------------------------- +%% write +%% +%% Write a record to the database table. +%% --------------------------------------------------------------- + +write(#tab{id = ID}, Rec) -> + ?vtrace("write to table ~p", [ID]), + dets:insert(ID, Rec). + + +%% --------------------------------------------------------------- +%% delete +%% +%% Delete the database table. +%% --------------------------------------------------------------- + +delete(#tab{id = ID}) -> + ?vtrace("delete database ~p", [ID]), + File = dets:info(ID, filename), + case dets:close(ID) of + ok -> + file:delete(File); + Error -> + Error + end. + + +%% --------------------------------------------------------------- +%% delete +%% +%% Delete a record from the database table. +%% --------------------------------------------------------------- + +delete(#tab{id = ID}, Key) -> + ?vtrace("delete from table ~p: ~p", [ID, Key]), + dets:delete(ID, Key). + + +%% --------------------------------------------------------------- +%% match_object +%% +%% Search the database table for records witch matches the pattern. +%% --------------------------------------------------------------- + +match_object(#tab{id = ID}, Pattern) -> + ?vtrace("match_object in ~p of ~p", [ID, Pattern]), + dets:match_object(ID, Pattern). + + +%% --------------------------------------------------------------- +%% match_delete +%% +%% Search the database table for records witch matches the +%% pattern and deletes them from the database table. +%% --------------------------------------------------------------- + +match_delete(#tab{id = ID}, Pattern) -> + ?vtrace("match_delete in ~p with pattern ~p", [ID, Pattern]), + Recs = dets:match_object(ID, Pattern), + dets:match_delete(ID, Pattern), + Recs. + + +%% --------------------------------------------------------------- +%% tab2list +%% +%% Return all records in the table in the form of a list. +%% --------------------------------------------------------------- + +tab2list(#tab{id = ID} = Tab) -> + ?vtrace("tab2list -> list of ~p", [ID]), + match_object(Tab, '_'). + + +%% --------------------------------------------------------------- +%% info +%% +%% Retrieve implementation dependent mib-storage table +%% information. +%% --------------------------------------------------------------- + +info(#tab{id = ID}) -> + ?vtrace("info -> info of ~p", [ID]), + dets:info(ID). + + +%% --------------------------------------------------------------- +%% sync +%% +%% Dump mib-storage table to disc (if it has a disk component) +%% --------------------------------------------------------------- + +sync(#tab{id = ID}) -> + ?vtrace("sync -> sync ~p", [ID]), + dets:sync(ID). + + +%% --------------------------------------------------------------- +%% backup +%% +%% Make a backup copy of the mib-storage table. +%% --------------------------------------------------------------- + +backup(#tab{id = ID}, BackupDir) -> + ?vtrace("backup -> backup of ~p to ~p", [ID, BackupDir]), + case dets:info(ID, filename) of + undefined -> + {error, no_file}; + Filename -> + case filename:dirname(Filename) of + BackupDir -> + {error, db_dir}; + _ -> + Type = dets:info(ID, type), + KP = dets:info(ID, keypos), + dets_backup(ID, + filename:basename(Filename), + BackupDir, Type, KP) + end + end. + + +dets_backup(ID, Filename, BackupDir, Type, KP) -> + ?vtrace("dets_backup -> entry with" + "~n ID: ~p" + "~n Filename: ~p" + "~n BackupDir: ~p" + "~n Type: ~p" + "~n KP: ~p", [ID, Filename, BackupDir, Type, KP]), + BackupFile = filename:join(BackupDir, Filename), + ?vtrace("dets_backup -> " + "~n BackupFile: ~p", [BackupFile]), + Backup = list_to_atom(atom_to_list(ID) ++ "_backup"), + Opts = [{file, BackupFile}, {type, Type}, {keypos, KP}], + case dets:open_file(Backup, Opts) of + {ok, B} -> + ?vtrace("dets_backup -> create fun", []), + F = fun(Arg) -> + dets_backup(Arg, start, ID, B) + end, + dets:safe_fixtable(ID, true), + Res = dets:init_table(Backup, F, [{format, bchunk}]), + dets:safe_fixtable(ID, false), + ?vtrace("dets_backup -> Res: ~p", [Res]), + Res; + Error -> + ?vinfo("dets_backup -> open_file failed: " + "~n ~p", [Error]), + Error + end. + +dets_backup(close, _Cont, _ID, B) -> + dets:close(B), + ok; +dets_backup(read, Cont1, ID, B) -> + case dets:bchunk(ID, Cont1) of + {Cont2, Data} -> + F = fun(Arg) -> + dets_backup(Arg, Cont2, ID, B) + end, + {Data, F}; + '$end_of_table' -> + dets:close(B), + end_of_input; + Error -> + Error + end. + + +%%---------------------------------------------------------------------- + +%% user_err(F, A) -> +%% snmpa_error:user_err(F, A). diff --git a/lib/snmp/src/agent/snmpa_mib_storage_ets.erl b/lib/snmp/src/agent/snmpa_mib_storage_ets.erl new file mode 100644 index 0000000000..fcf5e12043 --- /dev/null +++ b/lib/snmp/src/agent/snmpa_mib_storage_ets.erl @@ -0,0 +1,298 @@ +%% +%% %CopyrightBegin% +%% +%% Copyright Ericsson AB 2013-2013. All Rights Reserved. +%% +%% The contents of this file are subject to the Erlang Public License, +%% Version 1.1, (the "License"); you may not use this file except in +%% compliance with the License. You should have received a copy of the +%% Erlang Public License along with this software. If not, it can be +%% retrieved online at http://www.erlang.org/. +%% +%% Software distributed under the License is distributed on an "AS IS" +%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See +%% the License for the specific language governing rights and limitations +%% under the License. +%% +%% %CopyrightEnd% +%% + +-module(snmpa_mib_storage_ets). + +-behaviour(snmpa_mib_storage). + +%%%----------------------------------------------------------------- +%%% This module implements the snmpa_mib_storage behaviour. +%%% It uses ets for storage. +%%%----------------------------------------------------------------- + +-export([ + open/5, + close/1, + read/2, + write/2, + delete/1, + delete/2, + sync/1, + backup/2, + match_object/2, + match_delete/2, + tab2list/1, + info/1 + ]). + + +-define(VMODULE,"MS-ETS"). +-include("snmp_verbosity.hrl"). + +-record(tab, {id, file, checksum = false}). + + +%% --------------------------------------------------------------- +%% open +%% +%% Open or create an ets table. +%% Possibly also read data from a (specified) file (mirror) and +%% populate the table from that (the dir option). +%% +%% Opts - A list of implementation dependent options +%% ets_open_options() = [ets_open_option()] +%% ets_open_option() = {dir, filename()} | +%% {action, keep | clear} | +%% {checksum, boolean()} +%% +%% The RecName and Fields arguments are not used in this +%% implementation. +%% +%% --------------------------------------------------------------- + +%% This function creates the ets table +open(Name, _RecName, _Fields, Type, Opts) -> + ?vtrace("open table ~p", [Name]), + case lists:keysearch(dir, 1, Opts) of + {value, {dir, Dir}} -> + Action = snmp_misc:get_option(action, Opts, keep), + Checksum = snmp_misc:get_option(checksum, Opts, false), + ?vtrace("open ~p database ~p", [Type, Name]), + File = filename:join(Dir, atom_to_list(Name) ++ ".db"), + case file:read_file_info(File) of + {ok, _} -> + case ets:file2tab(File, [{verify, Checksum}]) of + {ok, ID} -> + {ok, #tab{id = ID, + file = File, + checksum = Checksum}}; + {error, Reason} when (Action =:= keep) -> + {error, {file2tab, Reason}}; + {error, Reason} -> + user_err("Warning: could not read file - " + "create new (empty): " + "~n File: ~p" + "~n Reason: ~p", [File, Reason]), + ID = ets:new(Name, [Type, protected, {keypos, 2}]), + write_ets_file(ID, File, Checksum), + {ok, #tab{id = ID, + file = File, + checksum = Checksum}} + end; + {error, Reason} when (Action =:= keep) -> + {error, {read_file_info, Reason}}; + {error, Reason} -> + user_err("Warning: could not read file info - " + "create new: " + "~n File: ~p" + "~n Reason: ~p", [File, Reason]), + ID = ets:new(Name, [Type, protected, {keypos, 2}]), + write_ets_file(ID, File, Checksum), + {ok, #tab{id = ID, + file = File, + checksum = Checksum}} + end; + false -> + ID = ets:new(Name, [Type, protected, {keypos, 2}]), + {ok, #tab{id = ID}} + end. + + +%% --------------------------------------------------------------- +%% close +%% +%% Close the mib-storage table. +%% We will delete the table and if there is a file component, +%% will also be written to file. +%% --------------------------------------------------------------- +close(#tab{id = ID, file = undefined}) -> + ?vtrace("close (delete) table ~p", [ID]), + ets:delete(ID); +close(#tab{id = ID, file = File, checksum = Checksum}) -> + ?vtrace("close (delete) table ~p", [ID]), + write_ets_file(ID, File, Checksum), + ets:delete(ID). + + +%% --------------------------------------------------------------- +%% read +%% +%% Retrieve a record from the mib-storage table. +%% --------------------------------------------------------------- + +read(#tab{id = ID}, Key) -> + ?vtrace("read from table ~p: ~p", [ID, Key]), + case ets:lookup(ID, Key) of + [Rec|_] -> {value, Rec}; + _ -> false + end. + + +%% --------------------------------------------------------------- +%% write +%% +%% Write a record to the mib-storage table. +%% --------------------------------------------------------------- + +write(#tab{id = ID}, Rec) -> + ?vtrace("write to table ~p", [ID]), + ets:insert(ID, Rec). + + +%% --------------------------------------------------------------- +%% delete +%% +%% Delete the mib-storage table. +%% --------------------------------------------------------------- +delete(#tab{id = ID, file = undefined}) -> + ?vtrace("delete table ~p", [ID]), + ets:delete(ID); +delete(#tab{id = ID, file = File}) -> + ?vtrace("delete table ~p", [ID]), + file:delete(File), + ets:delete(ID). + + +%% --------------------------------------------------------------- +%% delete +%% +%% Delete a record from the mib-storage table. +%% --------------------------------------------------------------- +delete(#tab{id = ID}, Key) -> + ?vtrace("delete from table ~p: ~p", [ID, Key]), + ets:delete(ID, Key). + + +%% --------------------------------------------------------------- +%% match_object +%% +%% Search the mib-storage table for records witch matches +%% the pattern. +%% --------------------------------------------------------------- + +match_object(#tab{id = ID}, Pattern) -> + ?vtrace("match_object in ~p of ~p", [ID, Pattern]), + ets:match_object(ID, Pattern). + + +%% --------------------------------------------------------------- +%% match_delete +%% +%% Search the mib-storage table for records witch matches +%% the pattern and deletes them from the table. +%% --------------------------------------------------------------- + +match_delete(#tab{id = ID}, Pattern) -> + ?vtrace("match_delete in ~p with pattern ~p", [ID, Pattern]), + Recs = ets:match_object(ID, Pattern), + ets:match_delete(ID, Pattern), + Recs. + + +%% --------------------------------------------------------------- +%% tab2list +%% +%% Return all records in the mib-storage table in the form +%% of a list. +%% --------------------------------------------------------------- + +tab2list(#tab{id = ID}) -> + ?vtrace("tab2list -> list of ~p", [ID]), + ets:tab2list(ID). + + + +%% --------------------------------------------------------------- +%% info +%% +%% Retrieve implementation dependent mib-storage table +%% information. +%% --------------------------------------------------------------- +info(#tab{id = ID}) -> + ?vtrace("info on ~p", [ID]), + case ets:info(ID) of + undefined -> + []; + L -> + L + end. + + +%% --------------------------------------------------------------- +%% sync +%% +%% Dump mib-storage table to disc (if there is a file compionent) +%% --------------------------------------------------------------- + +sync(#tab{file = undefined}) -> + ok; +sync(#tab{id = ID, file = File, checksum = Checksum}) -> + ?vtrace("sync ~p", [ID]), + write_ets_file(ID, File, Checksum). + + +%% --------------------------------------------------------------- +%% backup +%% +%% Make a backup copy of the mib-storage table. Only valid id +%% there is a file component. +%% --------------------------------------------------------------- + +backup(#tab{file = undefined}, _BackupDir) -> + ok; +backup(#tab{id = ID, file = File, checksum = Checksum}, BackupDir) -> + ?vtrace("backup ~p to ~p", [ID, BackupDir]), + Filename = filename:basename(File), + case filename:join(BackupDir, Filename) of + File -> + %% Oups: backup-dir and db-dir the same + {error, db_dir}; + BackupFile -> + write_ets_file(ID, BackupFile, Checksum) + end. + + +%%---------------------------------------------------------------------- + +write_ets_file(ID, File, Checksum) when (Checksum =:= true) -> + do_write_ets_file(ID, File, [{extended_info, [md5sum]}]); +write_ets_file(ID, File, Checksum) when (Checksum =:= false) -> + do_write_ets_file(ID, File, []). + +do_write_ets_file(ID, File, Options) -> + TmpFile = File ++ ".tmp", + case ets:tab2file(ID, TmpFile, Options) of + ok -> + case file:rename(TmpFile, File) of + ok -> + ok; + Else -> + user_err("Warning: could not move file ~p" + " (~p)", [File, Else]) + end; + {error, Reason} -> + user_err("Warning: could not save file ~p (~p)", + [File, Reason]) + end. + + +%%---------------------------------------------------------------------- + +user_err(F, A) -> + snmpa_error:user_err(F, A). diff --git a/lib/snmp/src/agent/snmpa_mib_storage_mnesia.erl b/lib/snmp/src/agent/snmpa_mib_storage_mnesia.erl new file mode 100644 index 0000000000..aee2192b24 --- /dev/null +++ b/lib/snmp/src/agent/snmpa_mib_storage_mnesia.erl @@ -0,0 +1,265 @@ +%% +%% %CopyrightBegin% +%% +%% Copyright Ericsson AB 2013-2013. All Rights Reserved. +%% +%% The contents of this file are subject to the Erlang Public License, +%% Version 1.1, (the "License"); you may not use this file except in +%% compliance with the License. You should have received a copy of the +%% Erlang Public License along with this software. If not, it can be +%% retrieved online at http://www.erlang.org/. +%% +%% Software distributed under the License is distributed on an "AS IS" +%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See +%% the License for the specific language governing rights and limitations +%% under the License. +%% +%% %CopyrightEnd% +%% +-module(snmpa_mib_storage_mnesia). + + +-behaviour(snmpa_mib_storage). + +%%%----------------------------------------------------------------- +%%% This module implements the snmpa_mib_storage behaviour. +%%% It uses mnesia for storage. +%%%----------------------------------------------------------------- + +-export([ + open/5, + close/1, + read/2, + write/2, + delete/1, + delete/2, + sync/1, + backup/2, + match_object/2, + match_delete/2, + tab2list/1, + info/1 + ]). + + +-define(VMODULE,"MS-MNESIA"). +-include("snmp_verbosity.hrl"). + +-record(tab, {id}). + + +%% --------------------------------------------------------------- +%% open +%% +%% Open or create a mnesia table. +%% +%% Opts - A list of implementation dependent options +%% mnesia_open_options() = [mnesia_open_option()] +%% mnesia_open_option() = {action, keep | clear} | +%% {nodes, [node()]} +%% +%% --------------------------------------------------------------- + +open(Name, RecName, Fields, Type, Opts) -> + ?vtrace("open ~p table ~p for record ~p", + [Type, Name, RecName]), + Action = snmp_misc:get_option(action, Opts, keep), + Nodes = snmp_misc:get_option(nodes, Opts, [node()]), + case table_exists(Name) of + true when (Action =:= keep) -> + {ok, #tab{id = Name}}; + true when (Action =:= clear) -> + F = fun() -> mnesia:clear_table(Name) end, + case mnesia:transaction(F) of + {aborted, Reason} -> + {error, {clear, Reason}}; + {atomic, _} -> + {ok, #tab{id = Name}} + end; + false -> + Args = [{record_name, RecName}, + {attributes, Fields}, + {type, Type}, + {disc_copies, Nodes}], + case mnesia:create_table(Name, Args) of + {atomic, ok} -> + {ok, #tab{id = Name}}; + {aborted, Reason} -> + {error, {create, Reason}} + end + end. + +table_exists(Name) -> + case (catch mnesia:table_info(Name, type)) of + {'EXIT', _Reason} -> + false; + _ -> + true + end. + + +%% --------------------------------------------------------------- +%% close +%% +%% Close the mib-storage table. +%% This does nothing in the mnesia case. +%% --------------------------------------------------------------- + +close(_) -> + ?vtrace("close mib-storage - ignore",[]), + ok. + + +%% --------------------------------------------------------------- +%% read +%% +%% Retrieve a record from the mib-storage table. +%% --------------------------------------------------------------- + +read(#tab{id = ID}, Key) -> + ?vtrace("read (dirty) from database ~p: ~p", [ID, Key]), + case (catch mnesia:dirty_read(ID, Key)) of + [Rec|_] -> {value,Rec}; + _ -> false + end. + + +%% --------------------------------------------------------------- +%% write +%% +%% Write a record to the mib-storage table. +%% --------------------------------------------------------------- + +write(#tab{id = ID}, Rec) -> + ?vtrace("write to database ~p", [ID]), + F = fun() -> mnesia:write(ID, Rec, write) end, + case mnesia:transaction(F) of + {aborted, _Reason} = ABORTED -> + {error, ABORTED}; + {atomic,_} -> + ok + end. + + +%% --------------------------------------------------------------- +%% delete +%% +%% Delete the mib-storage table. +%% --------------------------------------------------------------- + +delete(#tab{id = ID}) -> + ?vtrace("delete database: ~p", [ID]), + mnesia:delete_table(ID). + + +%% --------------------------------------------------------------- +%% delete +%% +%% Delete a record from the mib-storage table. +%% --------------------------------------------------------------- + +delete(#tab{id = ID}, Key) -> + ?vtrace("delete from database ~p: ~p", [ID, Key]), + F = fun() -> mnesia:delete(ID, Key, write) end, + case mnesia:transaction(F) of + {aborted, _Reason} = ABORTED -> + {error, ABORTED}; + {atomic, _} -> + ok + end. + + +%% --------------------------------------------------------------- +%% match_object +%% +%% Search the mib-storage table for records witch matches +%% the pattern. +%% --------------------------------------------------------------- + +match_object(#tab{id = ID}, Pattern) -> + ?vtrace("match_object in ~p of ~p", [ID, Pattern]), + F = fun() -> mnesia:match_object(ID, Pattern, read) end, + case mnesia:transaction(F) of + {aborted, _Reason} = ABORTED -> + {error, ABORTED}; + {atomic, Rs} -> + Rs + end. + + +%% --------------------------------------------------------------- +%% match_delete +%% +%% Search the mib-storage table for records witch matches +%% the pattern and deletes them from the table. +%% --------------------------------------------------------------- + +match_delete(#tab{id = ID}, Pattern) -> + ?vtrace("match_delete in ~p with pattern ~p", [ID, Pattern]), + F = fun() -> + Recs = mnesia:match_object(ID, Pattern, read), + lists:foreach(fun(Rec) -> + mnesia:delete_object(ID, Rec, write) + end, Recs), + Recs + end, + case mnesia:transaction(F) of + {aborted, _Reason} = ABORTED -> + {error, ABORTED}; + {atomic, Rs} -> + Rs + end. + + +%% --------------------------------------------------------------- +%% tab2list +%% +%% Return all records in the mib-storage table in the form of +%% a list. +%% --------------------------------------------------------------- + +tab2list(#tab{id = ID} = Tab) -> + ?vtrace("tab2list -> list of ~p", [ID]), + match_object(Tab, mnesia:table_info(ID, wild_pattern)). + + +%% --------------------------------------------------------------- +%% info +%% +%% Retrieve implementation dependent mib-storage table +%% information. +%% --------------------------------------------------------------- + +info(#tab{id = ID}) -> + case (catch mnesia:table_info(ID, all)) of + Info when is_list(Info) -> + Info; + {'EXIT', {aborted, Reason}} -> + {error, Reason} + end. + + +%% --------------------------------------------------------------- +%% sync +%% +%% Ignore +%% --------------------------------------------------------------- + +sync(_) -> + ok. + + +%% --------------------------------------------------------------- +%% backup +%% +%% Ignore. Mnesia handles its own backups. +%% --------------------------------------------------------------- + +backup(_, _) -> + ok. + + +%%---------------------------------------------------------------------- + +%% user_err(F, A) -> +%% snmpa_error:user_err(F, A). diff --git a/lib/snmp/src/agent/snmpa_supervisor.erl b/lib/snmp/src/agent/snmpa_supervisor.erl index 886fd074bc..1c8db7ff07 100644 --- a/lib/snmp/src/agent/snmpa_supervisor.erl +++ b/lib/snmp/src/agent/snmpa_supervisor.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 1996-2012. All Rights Reserved. +%% Copyright Ericsson AB 1996-2013. All Rights Reserved. %% %% The contents of this file are subject to the Erlang Public License, %% Version 1.1, (the "License"); you may not use this file except in @@ -224,25 +224,100 @@ init([AgentType, Opts]) -> ets:insert(snmp_agent_table, {error_report_mod, ErrorReportMod}), %% -- mib storage -- + %% MibStorage has only one mandatory part: module + %% Everything else is module dependent and therefor + %% put in a special option: options MibStorage = - case get_opt(mib_storage, Opts, ets) of + case get_opt(mib_storage, Opts, [{module, snmpa_mib_storage_ets}]) of + + %% --- ETS wrappers --- + + ets -> + [{module, snmpa_mib_storage_ets}]; + {ets, default} -> + [{module, snmpa_mib_storage_ets}, + {options, [{dir, filename:join([DbDir])}, + {action, keep}]}]; + {ets, Dir} when is_list(Dir) -> + [{module, snmpa_mib_storage_ets}, + {options, [{dir, filename:join([Dir])}, + {action, keep}]}]; + {ets, default, Action} when ((Action =:= keep) orelse + (Action =:= clear)) -> + [{module, snmpa_mib_storage_ets}, + {options, [{dir, filename:join([DbDir])}, + {action, Action}]}]; + {ets, Dir, Action} when is_list(Dir) andalso + ((Action =:= keep) orelse + (Action =:= clear)) -> + [{module, snmpa_mib_storage_ets}, + {options, [{dir, filename:join([Dir])}, + {action, Action}]}]; + + %% --- DETS wrappers --- + dets -> - {dets, DbDir}; + [{module, snmpa_mib_storage_dets}, + {options, [{dir, filename:join([DbDir])}, + {action, keep}]}]; {dets, default} -> - {dets, DbDir}; - {dets, default, Act} -> - {dets, DbDir, Act}; - {ets, default} -> - {ets, DbDir}; + [{module, snmpa_mib_storage_dets}, + {options, [{dir, filename:join([DbDir])}, + {action, keep}]}]; + {dets, default, Action} when ((Action =:= keep) orelse + (Action =:= clear)) -> + [{module, snmpa_mib_storage_dets}, + {options, [{dir, filename:join([DbDir])}, + {action, Action}]}]; + {dets, Dir, Action} when is_list(Dir) andalso + ((Action =:= keep) orelse + (Action =:= clear)) -> + [{module, snmpa_mib_storage_dets}, + {options, [{dir, filename:join([Dir])}, + {action, Action}]}]; + + %% --- Mnesia wrappers --- + mnesia -> - {mnesia, erlang:nodes()}; - {mnesia, visible} -> - {mnesia, erlang:nodes(visible)}; - {mnesia, connected} -> - {mnesia, erlang:nodes(connected)}; - Other -> + [{module, snmpa_mib_storage_mnesia}, + {options, [{nodes, erlang:nodes()}, + {action, keep}]}]; + {mnesia, Nodes0} -> + Nodes = + if + Nodes0 =:= visible -> + erlang:nodes(visible); + Nodes0 =:= connected -> + erlang:nodes(connected); + Nodes0 =:= [] -> + [node()]; + true -> + Nodes0 + end, + [{module, snmpa_mib_storage_mnesia}, + {options, [{nodes, Nodes}, + {action, keep}]}]; + {mnesia, Nodes0, Action} when ((Action =:= keep) orelse + (Action =:= clear)) -> + Nodes = + if + Nodes0 =:= visible -> + erlang:nodes(visible); + Nodes0 =:= connected -> + erlang:nodes(connected); + Nodes0 =:= [] -> + [node()]; + true -> + Nodes0 + end, + [{module, snmpa_mib_storage_mnesia}, + {options, [{nodes, Nodes}, + {action, Action}]}]; + + Other when is_list(Other) -> Other end, + ?vdebug("[agent table] store mib storage: ~w",[MibStorage]), ets:insert(snmp_agent_table, {mib_storage, MibStorage}), -- cgit v1.2.3