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Merge branch 'maint'

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2 parents 42dba5a + 2d97f0e commit dd31e0c129742bdc058cef89fe0d5d763ea8b0f5 @bmk bmk committed Feb 6, 2012
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@@ -1,7 +1,7 @@
#
# %CopyrightBegin%
#
-# Copyright Ericsson AB 1997-2011. All Rights Reserved.
+# Copyright Ericsson AB 1997-2012. 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
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@@ -34,6 +34,64 @@
<section>
+ <title>SNMP Development Toolkit 4.21.7</title>
+ <p>Version 4.21.7 supports code replacement in runtime from/to
+ version 4.21.6, 4.21.5, 4.21.4, 4.21.3, 4.21.2, 4.21.1, 4.21, 4.20.1 and
+ 4.20. </p>
+
+ <section>
+ <title>Improvements and new features</title>
+ <p>-</p>
+
+ <!--
+ <list type="bulleted">
+ <item>
+ <p>[agent] DoS attack using GET-BULK with large value of
+ MaxRepetitions.
+ A preventive method has been implementing by simply
+ limit the number of varbinds that can be included in
+ a Get-BULK response message. This is specified by the
+ new config option,
+ <seealso marker="snmp_app#agent_gb_max_vbs">gb_max_vbs</seealso>.
+ </p>
+ <p>Own Id: OTP-9700</p>
+ </item>
+
+ </list>
+ -->
+
+ </section>
+
+ <section>
+ <title>Reported Fixed Bugs and Malfunctions</title>
+ <!--
+ <p>-</p>
+ -->
+
+ <list type="bulleted">
+ <item>
+ <p>[agent] Simultaneous
+ <seealso marker="snmpa#backup">snmpa:backup/1,2</seealso>
+ calls can interfere.
+ The master agent did not check if a backup was already in
+ progress when a backup request was accepted. </p>
+ <p>Own Id: OTP-9884</p>
+ <p>Aux Id: Seq 11995</p>
+ </item>
+
+ </list>
+
+ </section>
+
+ <section>
+ <title>Incompatibilities</title>
+ <p>-</p>
+ </section>
+
+ </section> <!-- 4.21.7 -->
+
+
+ <section>
<title>SNMP Development Toolkit 4.21.6</title>
<p>Version 4.21.6 supports code replacement in runtime from/to
version 4.21.5, 4.21.4, 4.21.3, 4.21.2, 4.21.1, 4.21, 4.20.1 and
View
@@ -4,7 +4,7 @@
<erlref>
<header>
<copyright>
- <year>2004</year><year>2011</year>
+ <year>2004</year><year>2012</year>
<holder>Ericsson AB. All Rights Reserved.</holder>
</copyright>
<legalnotice>
@@ -198,12 +198,18 @@ notification_delivery_info() = #snmpa_notification_delivery_info{}
<type>
<v>BackupDir = string()</v>
<v>Agent = pid() | atom()</v>
+ <v>Reason = backup_in_progress | term()</v>
</type>
<desc>
<p>Backup persistent/permanent data handled by the agent
(such as local-db, mib-data and vacm). </p>
<p>Data stored by mnesia is not handled. </p>
<p>BackupDir cannot be identical to DbDir. </p>
+ <p>Simultaneous backup calls are <em>not</em> allowed.
+ That is, two different processes cannot simultaneously
+ successfully call this function. One of them will be first,
+ and succeed. The second will fail with the error reason
+ <c>backup_in_progress</c>. </p>
<marker id="info"></marker>
</desc>
@@ -217,13 +223,13 @@ notification_delivery_info() = #snmpa_notification_delivery_info{}
</type>
<desc>
<p>Returns a list (a dictionary) containing information about
- the agent. Information includes loaded MIBs, registered
- sub-agents, some information about the memory allocation. </p>
- <p>As of version 4.4 the format of the info has been changed.
- To convert the info to the old format, call the
- <seealso marker="#old_info_format">old_info_format</seealso>
- function. </p>
-
+ the agent. Information includes loaded MIBs, registered
+ sub-agents, some information about the memory allocation. </p>
+ <p>As of version 4.4 the format of the info has been changed.
+ To convert the info to the old format, call the
+ <seealso marker="#old_info_format">old_info_format</seealso>
+ function. </p>
+
<marker id="old_info_format"></marker>
</desc>
</func>
@@ -1262,7 +1262,8 @@ handle_call(info, _From, S) ->
handle_call(get_net_if, _From, S) ->
{reply, get(net_if), S};
-handle_call({backup, BackupDir}, From, S) ->
+%% Only accept a backup request if there is none already in progress
+handle_call({backup, BackupDir}, From, #state{backup = undefined} = S) ->
?vlog("backup: ~p", [BackupDir]),
Pid = self(),
V = get(verbosity),
@@ -1279,7 +1280,11 @@ handle_call({backup, BackupDir}, From, S) ->
end),
?vtrace("backup server: ~p", [BackupServer]),
{noreply, S#state{backup = {BackupServer, From}}};
-
+
+handle_call({backup, _BackupDir}, From, #state{backup = Backup} = S) ->
+ ?vinfo("backup already in progress: ~p", [Backup]),
+ {reply, {error, backup_in_progress}, S};
+
handle_call(dump_mibs, _From, S) ->
Reply = snmpa_mib:dump(get(mibserver)),
{reply, Reply, S};
@@ -486,7 +486,11 @@ handle_call({match, Name, Db, Pattern}, _From, State) ->
L1 = match(Db, Name, Pattern, State),
{reply, lists:delete([undef], L1), State};
-handle_call({backup, BackupDir}, From, #state{dets = Dets} = State) ->
+%% This check (that there is no backup already in progress) is also
+%% done in the master agent process, but just in case a user issues
+%% a backup call to this process directly, we add a similar check here.
+handle_call({backup, BackupDir}, From,
+ #state{backup = undefined, dets = Dets} = State) ->
?vlog("backup: ~p",[BackupDir]),
Pid = self(),
V = get(verbosity),
@@ -511,6 +515,10 @@ handle_call({backup, BackupDir}, From, #state{dets = Dets} = State) ->
{reply, Error, State}
end;
+handle_call({backup, _BackupDir}, From, #state{backup = Backup} = S) ->
+ ?vinfo("backup already in progress: ~p", [Backup]),
+ {reply, {error, backup_in_progress}, S};
+
handle_call(dump, _From, #state{dets = Dets} = State) ->
?vlog("dump",[]),
dets_sync(Dets),
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 1996-2010. All Rights Reserved.
+%% Copyright Ericsson AB 1996-2012. 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
@@ -552,8 +552,12 @@ handle_call({dump, File}, _From, #state{data = Data} = State) ->
Reply = snmpa_mib_data:dump(Data, File),
{reply, Reply, State};
-handle_call({backup, BackupDir}, From, #state{data = Data} = State) ->
- ?vlog("backup to ~s",[BackupDir]),
+%% This check (that there is no backup already in progress) is also
+%% done in the master agent process, but just in case a user issues
+%% a backup call to this process directly, we add a similar check here.
+handle_call({backup, BackupDir}, From,
+ #state{backup = undefined, data = Data} = State) ->
+ ?vlog("backup to ~s", [BackupDir]),
Pid = self(),
V = get(verbosity),
case file:read_file_info(BackupDir) of
@@ -576,6 +580,10 @@ handle_call({backup, BackupDir}, From, #state{data = Data} = State) ->
{reply, Error, State}
end;
+handle_call({backup, _BackupDir}, From, #state{backup = Backup} = S) ->
+ ?vinfo("backup already in progress: ~p", [Backup]),
+ {reply, {error, backup_in_progress}, S};
+
handle_call(stop, _From, State) ->
?vlog("stop",[]),
{stop, normal, ok, State};
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 1997-2011. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2012. 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
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