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authorMicael Karlberg <[email protected]>2013-05-21 11:17:44 +0200
committerMicael Karlberg <[email protected]>2013-05-21 11:55:51 +0200
commit31b06641f692641f82c489069584220609e1e840 (patch)
tree08e5f9a08fca995741d38332815e4ff73c9018b4 /lib
parent3ffa5b5c87518b6579f48b935cb67c7eb22b10b4 (diff)
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[snmp/agent] backup
Diffstat (limited to 'lib')
-rw-r--r--lib/snmp/doc/src/snmp_app.xml48
-rw-r--r--lib/snmp/src/agent/depend.mk12
-rw-r--r--lib/snmp/src/agent/modules.mk4
-rw-r--r--lib/snmp/src/agent/snmpa_mib_storage.erl181
-rw-r--r--lib/snmp/src/agent/snmpa_mib_storage_dets.erl298
-rw-r--r--lib/snmp/src/agent/snmpa_mib_storage_ets.erl298
-rw-r--r--lib/snmp/src/agent/snmpa_mib_storage_mnesia.erl265
-rw-r--r--lib/snmp/src/agent/snmpa_supervisor.erl103
8 files changed, 1172 insertions, 37 deletions
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 @@
</item>
<marker id="agent_mib_storage"></marker>
- <tag><c><![CDATA[mib_storage() = ets | {ets, Dir} | {ets, Dir, Action} | dets | {dets, Dir} | {dets, Dir, Action} | mnesia | {mnesia, Nodes} | {mnesia, Nodes, Action} <optional>]]></c></tag>
- <item>
- <p>Specifies how info retrieved from the mibs will be stored.</p>
- <p>If <c>mib_storage</c> is <c>{ets, Dir}</c>, the table will also be
- stored on file. If <c>Dir</c> is <c>default</c>, then <c>db_dir</c>
- will be used.</p>
- <p>If <c>mib_storage</c> is <c>dets</c> or if <c>Dir</c> is
- <c>default</c>, then <c>db_dir</c> will be used for <c>Dir</c>.</p>
- <p>If <c>mib_storage</c> is <c>mnesia</c> then <c>erlang:nodes()</c>
- will be used for <c>Nodes</c>.</p>
- <p>Default is <c>ets</c>. </p>
- <p><c>Dir = default | string()</c>. Dir is the directory where the
- files will be stored. If <c>default</c>, then <c>db_dir</c> will be
- used.</p>
- <p><c>Nodes = visible | connected | [node()]</c>.
- <c>Nodes = visible</c> is translated to
- <c>erlang:nodes(visible)</c>.
- <c>Nodes = connected</c> is translated to
- <c>erlang:nodes(connected)</c>.
- If <c>Nodes = []</c> then the own node is assumed.</p>
- <p><c>Action = clear | keep</c>. Default is <c>keep</c>.
- <c>Action</c> is used to specify what shall be done if the
- mnesia/dets table already exist.</p>
+ <tag><c><![CDATA[mib_storage() = [mib_storage_opt()]]]></c></tag>
+ <item>
+ <p><c>mib_storage_opt() = {module, mib_storage_module()} | {options, list()}</c></p>
+ <p>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. </p>
+ <p>Default is <c>[{module, snmpa_mib_storage_ets}]</c>. </p>
+ </item>
+
+ <marker id="agent_mst_module"></marker>
+ <tag><c><![CDATA[mib_storage_module() = snmpa_mib_data_ets | snmpa_mib_data_dets | snmpa_mib_data_mnesia | module() <optional>]]></c></tag>
+ <item>
+ <p>Defines the callback mib data storage module of the
+ SNMP agent mib-server as defined by the
+ <seealso marker="snmpa_mib_data">snmpa_mib_data</seealso>
+ behaviour. </p>
+ <p>At present only the default module is provided with the agent,
+ <c>snmpa_mib_data_tttn</c>. </p>
+<!--
+ <p>Two modules is provided with the agent
+ <c>snmpa_mib_data_tttn</c> (this is the old implementation) and
+ <c>snmpa_mib_data_ttln</c> (for a mib tree with many holes,
+ this algorithm can be more price efficient). </p>
+-->
+ <p>Default module is <c>snmpa_mib_data_tttn</c>. </p>
</item>
<marker id="agent_mib_server"></marker>
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}),