From e3a9039d7c8f362b00420361a9ed174d0467470e Mon Sep 17 00:00:00 2001 From: Micael Karlberg Date: Wed, 25 Jan 2012 17:56:15 +0100 Subject: [snmp/agent] Simultaneous snmpa:backup/1,2 calls interfere Simultaneous snmpa#backup">snmpa:backup/1,2 calls interfere. The master agent did not check if a backup was already in progress when a backup request was accepted OTP-9884 --- lib/snmp/src/agent/snmpa_mib.erl | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) (limited to 'lib/snmp/src/agent/snmpa_mib.erl') diff --git a/lib/snmp/src/agent/snmpa_mib.erl b/lib/snmp/src/agent/snmpa_mib.erl index ce90db18b3..574467d38f 100644 --- a/lib/snmp/src/agent/snmpa_mib.erl +++ b/lib/snmp/src/agent/snmpa_mib.erl @@ -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}; -- cgit v1.2.1