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-rw-r--r--lib/snmp/doc/src/snmp_app.xml29
-rw-r--r--lib/snmp/doc/src/snmp_config.xml29
-rw-r--r--lib/snmp/doc/src/snmpa_mib_storage.xml292
-rw-r--r--lib/snmp/src/agent/snmpa_mib_storage_mnesia.erl31
4 files changed, 373 insertions, 8 deletions
diff --git a/lib/snmp/doc/src/snmp_app.xml b/lib/snmp/doc/src/snmp_app.xml
index c62c8f1541..f5a6de1099 100644
--- a/lib/snmp/doc/src/snmp_app.xml
+++ b/lib/snmp/doc/src/snmp_app.xml
@@ -329,7 +329,7 @@
behaviour. </p>
<p>Several entities (<c>mib-server</c> via the its data module and
the <c>symbolic-store</c>) of the snmp agent uses this for storage
- of miscelaneous mib data. </p>
+ of miscelaneous mib related data retrieved while loading a mib. </p>
<p>There are several implementations provided with the agent:
<c>snmpa_mib_storage_ets</c>, <c>snmpa_mib_storage_dets</c> and
<c>snmpa_mib_storage_mnesia</c>. </p>
@@ -340,7 +340,8 @@
<tag><c><![CDATA[mib_storage_options() = list() <optional>]]></c></tag>
<item>
<p>This is implementattion depended. That is, it depends on the
- module. For each module a specific set of options are valid: </p>
+ module. For each module a specific set of options are valid.
+ For the module provided with the app, these options are supported: </p>
<list type="bulleted">
<item>
<p><c>snmpa_mib_storage_ets</c>: <c>{dir, filename()} | {action, keep | clear}, {checksum, boolean()}</c></p>
@@ -395,7 +396,29 @@
<p>Default is <c>keep</c>. </p>
</item>
<item>
- <p><c>nodes</c> - Defines where to open the table. </p>
+ <p><c>nodes</c> - A list of node names (or an atom
+ describing a list of nodes) defining where to open the table.
+ Its up to the user to ensure that mnesia is actually running
+ on the specified nodes. </p>
+ <p>The following distinct values are recognised: </p>
+ <list>
+ <item>
+ <p><c>[]</c> - Translated into a list of the own node: <c>[node()]</c></p>
+ </item>
+ <item>
+ <p><c>all</c> - <c>erlang:nodes()</c></p>
+ </item>
+ <item>
+ <p><c>visible</c> - <c>erlang:nodes(visible)</c></p>
+ </item>
+ <item>
+ <p><c>connected</c> - <c>erlang:nodes(connected)</c></p>
+ </item>
+ <item>
+ <p><c>db_nodes</c> - <c>mnesia:system_info(db_nodes)</c></p>
+ </item>
+ </list>
+
<p>Default is the result of the call: <c>erlang:nodes()</c>. </p>
</item>
</list>
diff --git a/lib/snmp/doc/src/snmp_config.xml b/lib/snmp/doc/src/snmp_config.xml
index a88111085f..f1acebf2f7 100644
--- a/lib/snmp/doc/src/snmp_config.xml
+++ b/lib/snmp/doc/src/snmp_config.xml
@@ -326,7 +326,7 @@
behaviour. </p>
<p>Several entities (<c>mib-server</c> via the its data module and
the <c>symbolic-store</c>) of the snmp agent uses this for storage
- of miscelaneous mib data. </p>
+ of miscelaneous mib related data dataretrieved while loading a mib. </p>
<p>There are several implementations provided with the agent:
<c>snmpa_mib_storage_ets</c>, <c>snmpa_mib_storage_dets</c> and
<c>snmpa_mib_storage_mnesia</c>. </p>
@@ -337,7 +337,8 @@
<tag><c><![CDATA[mib_storage_options() = list() <optional>]]></c></tag>
<item>
<p>This is implementattion depended. That is, it depends on the
- module. For each module a specific set of options are valid: </p>
+ module. For each module a specific set of options are valid.
+ For the module provided with the app, these options are supported: </p>
<list type="bulleted">
<item>
<p><c>snmpa_mib_storage_ets</c>: <c>{dir, filename()} | {action, keep | clear}, {checksum, boolean()}</c></p>
@@ -392,7 +393,29 @@
<p>Default is <c>keep</c>. </p>
</item>
<item>
- <p><c>nodes</c> - Defines where to open the table. </p>
+ <p><c>nodes</c> - A list of node names (or an atom
+ describing a list of nodes) defining where to open the table.
+ Its up to the user to ensure that mnesia is actually running
+ on the specified nodes. </p>
+ <p>The following distinct values are recognised: </p>
+ <list>
+ <item>
+ <p><c>[]</c> - Translated into a list of the own node: <c>[node()]</c></p>
+ </item>
+ <item>
+ <p><c>all</c> - <c>erlang:nodes()</c></p>
+ </item>
+ <item>
+ <p><c>visible</c> - <c>erlang:nodes(visible)</c></p>
+ </item>
+ <item>
+ <p><c>connected</c> - <c>erlang:nodes(connected)</c></p>
+ </item>
+ <item>
+ <p><c>db_nodes</c> - <c>mnesia:system_info(db_nodes)</c></p>
+ </item>
+ </list>
+
<p>Default is the result of the call: <c>erlang:nodes()</c>. </p>
</item>
</list>
diff --git a/lib/snmp/doc/src/snmpa_mib_storage.xml b/lib/snmp/doc/src/snmpa_mib_storage.xml
new file mode 100644
index 0000000000..a857ce79e8
--- /dev/null
+++ b/lib/snmp/doc/src/snmpa_mib_storage.xml
@@ -0,0 +1,292 @@
+<?xml version="1.0" encoding="iso-8859-1" ?>
+<!DOCTYPE erlref SYSTEM "erlref.dtd">
+
+<erlref>
+ <header>
+ <copyright>
+ <year>2013</year><year>2013</year>
+ <holder>Ericsson AB. All Rights Reserved.</holder>
+ </copyright>
+ <legalnotice>
+ 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.
+
+ </legalnotice>
+
+ <title>snmpa_mib_storage</title>
+ <prepared></prepared>
+ <docno></docno>
+ <date></date>
+ <rev></rev>
+ <file>snmpa_mib_storage.xml</file>
+ </header>
+
+ <module>snmpa_mib_storage</module>
+ <modulesummary>
+ Behaviour module for the SNMP agent mib storage.
+ </modulesummary>
+ <description>
+ <p>This module defines the behaviour of the SNMP agent mib storage. </p>
+ <p>The mib storage is used by the agent to store internal mib-
+ related information. The mib storage module is used by several entities,
+ not just the mib-server. </p>
+
+ <p>A <c>snmpa_mib_storage</c> compliant module
+ must export the following functions: </p>
+ <list type="bulleted">
+ <item>
+ <seealso marker="#open">open/5</seealso>
+ </item>
+ <item>
+ <seealso marker="#close">close/1</seealso>
+ </item>
+ <item>
+ <seealso marker="#read">read/2</seealso>
+ </item>
+ <item>
+ <seealso marker="#write">write/2</seealso>
+ </item>
+ <item>
+ <seealso marker="#delete1">delete/1</seealso>
+ </item>
+ <item>
+ <seealso marker="#delete2">delete/2</seealso>
+ </item>
+ <item>
+ <seealso marker="#match_object">match_object/2</seealso>
+ </item>
+ <item>
+ <seealso marker="#match_delete">match_delete/2</seealso>
+ </item>
+ <item>
+ <seealso marker="#tab2list">tab2list/1</seealso>
+ </item>
+ <item>
+ <seealso marker="#info">info/1</seealso>
+ </item>
+ <item>
+ <seealso marker="#sync">sync/1</seealso>
+ </item>
+ <item>
+ <seealso marker="#backup">backup/2</seealso>
+ </item>
+ </list>
+
+ <p>The semantics of them and their exact signatures are
+ explained below. </p>
+
+ </description>
+
+ <section>
+ <title>CALLBACK FUNCTIONS</title>
+ <p>The following functions must be exported from a
+ <c>mib-server</c> data callback module: </p>
+
+ <marker id="open"></marker>
+ </section>
+
+ <funcs>
+ <func>
+ <name>Module:open(Name, RecordName, Fields, Type, Options) -> {ok, TabId} | {error, Reason}</name>
+ <fsummary>Create new (mib-server) data instance</fsummary>
+ <type>
+ <v>Name = atom()</v>
+ <v>RecordName = atom()</v>
+ <v>Fields = [atom()]</v>
+ <v>Type = set | bag()</v>
+ <v>Options = list()</v>
+ <v>TabId = term()</v>
+ <v>Reason = term()</v>
+ </type>
+ <desc>
+ <p>Create or open a mib storage table. </p>
+ <p>Note that the <c>RecordName</c> and <c>Fields</c> arguments
+ my not be used in all implementations (they are actually only
+ needed for mnesia-based implementations). </p>
+
+ <p>Note also that the <c>Options</c> argument comes from
+ the <c>options</c> config option of the mib-storage config option,
+ and is passed on as is. </p>
+
+ <marker id="close"></marker>
+ </desc>
+ </func>
+
+ <func>
+ <name>Module:close(TabId) -> void()</name>
+ <fsummary>Close the mib-storage table</fsummary>
+ <type>
+ <v>State = term()</v>
+ </type>
+ <desc>
+ <p>Close the mib-storage table.</p>
+
+ <marker id="read"></marker>
+ </desc>
+ </func>
+
+ <func>
+ <name>Module:read(TabId, Key) -> false | {value, Record}</name>
+ <fsummary>Read a record from the mib-storage table</fsummary>
+ <type>
+ <v>TabId = term()</v>
+ <v>Key = term()</v>
+ <v>Record = tuple()</v>
+ </type>
+ <desc>
+ <p>Read a record from the mib-storage table. </p>
+
+ <marker id="write"></marker>
+ </desc>
+ </func>
+
+ <func>
+ <name>Module:write(TabId, Record) -> ok | {error, Reason}</name>
+ <fsummary>Write a record to the mib-storage table</fsummary>
+ <type>
+ <v>TabId = term()</v>
+ <v>Record = tuple()</v>
+ <v>Reason = term()</v>
+ </type>
+ <desc>
+ <p>Write a record to the mib-storage table. </p>
+
+ <marker id="delete1"></marker>
+ </desc>
+ </func>
+
+ <func>
+ <name>Module:delete(TabId) -> void()</name>
+ <fsummary>Delete an entire mib-storage table</fsummary>
+ <type>
+ <v>TabId = term()</v>
+ </type>
+ <desc>
+ <p>Delete an entire mib-storage table. </p>
+
+ <marker id="delete2"></marker>
+ </desc>
+ </func>
+
+ <func>
+ <name>Module:delete(TabId, Key) -> ok | {error, Reason}</name>
+ <fsummary>Delete a record from the mib-storage table</fsummary>
+ <type>
+ <v>TabId = term()</v>
+ <v>Key = term()</v>
+ <v>Reason = term()</v>
+ </type>
+ <desc>
+ <p>Delete a record from the mib-storage table. </p>
+
+ <marker id="match_object"></marker>
+ </desc>
+ </func>
+
+ <func>
+ <name>Module:match_object(TabId, Pattern) -> {ok, Recs} | {error, Reason}</name>
+ <fsummary>Search the mib-storage table for record matching pattern</fsummary>
+ <type>
+ <v>TabId = term()</v>
+ <v>Pattern = match_pattern()</v>
+ <v>Recs = [tuple()]</v>
+ <v>Reason = term()</v>
+ </type>
+ <desc>
+ <p>Search the mib-storage table for record that match the
+ specified pattern. </p>
+
+ <marker id="match_delete"></marker>
+ </desc>
+ </func>
+
+ <func>
+ <name>Module:match_delete(TabId, Pattern) -> {ok, Recs} | {error, Reason}</name>
+ <fsummary>Delete records in the mib-storage table matching pattern</fsummary>
+ <type>
+ <v>TabId = term()</v>
+ <v>Pattern = match_pattern()</v>
+ <v>Recs = [tuple()]</v>
+ <v>Reason = term()</v>
+ </type>
+ <desc>
+ <p>Search the mib-storage table for record that match the
+ specified pattern and then delete them. The records deleted are
+ also returned. </p>
+
+ <marker id="tab2list"></marker>
+ </desc>
+ </func>
+
+ <func>
+ <name>Module:tab2list(TabId) -> Recs</name>
+ <fsummary>Return all records of the mib-storage table</fsummary>
+ <type>
+ <v>TabId = term()</v>
+ <v>Recs = [tuple()]</v>
+ </type>
+ <desc>
+ <p>Return all records in the mib-storage table in the form
+ of a list. </p>
+
+ <marker id="info"></marker>
+ </desc>
+ </func>
+
+ <func>
+ <name>Module:info(TabId) -> {ok, Info} | {error, Reason}</name>
+ <fsummary>Returns information about the mib-storage table. </fsummary>
+ <type>
+ <v>TabId = term()</v>
+ <v>Info = term()</v>
+ <v>Reason = term()</v>
+ </type>
+ <desc>
+ <p>Retrieve implementation dependent mib-storage table
+ information. </p>
+
+ <marker id="sync"></marker>
+ </desc>
+ </func>
+
+ <func>
+ <name>Module:sync(TabId) -> void()</name>
+ <fsummary>Synchronize mib-storage table</fsummary>
+ <type>
+ <v>TabId = term()</v>
+ </type>
+ <desc>
+ <p>Synchronize the mib-storage table. </p>
+ <p>What this means, if anything, is implementation dependent. </p>
+
+ <marker id="backup"></marker>
+ </desc>
+ </func>
+
+ <func>
+ <name>Module:backup(TabId, BackupDir) -> ok | {error, Reason}</name>
+ <fsummary>Perform a backup of the mib-storage table</fsummary>
+ <type>
+ <v>TabId = term()</v>
+ <v>BackupDir = string()</v>
+ <v>Reason = term()</v>
+ </type>
+ <desc>
+ <p>Perform a backup of the mib-storage table. </p>
+ <p>What this means, if anything, is implementation dependent. </p>
+
+ </desc>
+ </func>
+
+ </funcs>
+
+</erlref>
+
diff --git a/lib/snmp/src/agent/snmpa_mib_storage_mnesia.erl b/lib/snmp/src/agent/snmpa_mib_storage_mnesia.erl
index dca44d3c33..192b5aa26e 100644
--- a/lib/snmp/src/agent/snmpa_mib_storage_mnesia.erl
+++ b/lib/snmp/src/agent/snmpa_mib_storage_mnesia.erl
@@ -63,8 +63,8 @@
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, erlang:nodes()),
+ Action = get_action(Opts),
+ Nodes = get_nodes(Opts),
case table_exists(Name) of
true when (Action =:= keep) ->
?vtrace("open table ~p - exist (keep)", [Name]),
@@ -271,5 +271,32 @@ backup(_, _) ->
%%----------------------------------------------------------------------
+get_action(Opts) ->
+ snmp_misc:get_option(action, Opts, keep).
+
+get_nodes(Opts) ->
+ case snmp_misc:get_option(nodes, Opts, erlang:nodes()) of
+ [] ->
+ [node()];
+ Nodes when is_list(Nodes) ->
+ Nodes;
+ all ->
+ erlang:nodes();
+ visible ->
+ erlang:nodes(visible);
+ connected ->
+ erlang:nodes(connected);
+ db_nodes ->
+ try mnesia:system_info(db_nodes) of
+ DbNodes when is_list(DbNodes) ->
+ DbNodes;
+ _ ->
+ erlang:nodes()
+ catch
+ _:_ ->
+ erlang:nodes()
+ end
+ end.
+
%% user_err(F, A) ->
%% snmpa_error:user_err(F, A).
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-04 09:13:02 +0000