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authorMicael Karlberg <[email protected]>2012-01-25 17:56:15 +0100
committerMicael Karlberg <[email protected]>2012-01-25 17:56:15 +0100
commite3a9039d7c8f362b00420361a9ed174d0467470e (patch)
tree9f18ff932a97e69fdc76a97b3a01336f05c2a91b /lib/snmp/src
parente0e862b42d508b5112395f41584bed90c74a8a92 (diff)
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[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
Diffstat (limited to 'lib/snmp/src')
-rw-r--r--lib/snmp/src/agent/snmpa_agent.erl11
-rw-r--r--lib/snmp/src/agent/snmpa_mib.erl14
-rw-r--r--lib/snmp/src/app/snmp.appup.src19
3 files changed, 38 insertions, 6 deletions
diff --git a/lib/snmp/src/agent/snmpa_agent.erl b/lib/snmp/src/agent/snmpa_agent.erl
index 00fe9be098..e3178aacc6 100644
--- a/lib/snmp/src/agent/snmpa_agent.erl
+++ b/lib/snmp/src/agent/snmpa_agent.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
@@ -1190,7 +1190,8 @@ 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),
@@ -1207,7 +1208,11 @@ 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};
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};
diff --git a/lib/snmp/src/app/snmp.appup.src b/lib/snmp/src/app/snmp.appup.src
index 4ac6daf579..6655935c5c 100644
--- a/lib/snmp/src/app/snmp.appup.src
+++ b/lib/snmp/src/app/snmp.appup.src
@@ -22,6 +22,12 @@
%% ----- U p g r a d e -------------------------------------------------------
[
+ {"4.17.3",
+ [
+ {update, snmpa_mib, soft, soft_purge, soft_purge, []},
+ {update, snmpa_agent, soft, soft_purge, soft_purge, []}
+ ]
+ },
{"4.17.2",
[
{load_module, snmpa, soft_purge, soft_purge, []},
@@ -41,6 +47,7 @@
{load_module, snmpa_trap, soft_purge, soft_purge, []},
{load_module, snmpa_vacm, soft_purge, soft_purge, []},
{update, snmpa_supervisor, soft, soft_purge, soft_purge, []},
+ {update, snmpa_mib, soft, soft_purge, soft_purge, []},
{update, snmpa_agent, soft, soft_purge, soft_purge, []},
{load_module, snmpm, soft_purge, soft_purge, [snmpm_server]},
{update, snmpm_server, soft, soft_purge, soft_purge, []}
@@ -57,6 +64,7 @@
{load_module, snmpm, soft_purge, soft_purge, [snmpm_server]},
{update, snmpm_server, soft, soft_purge, soft_purge, []},
{update, snmpa_supervisor, soft, soft_purge, soft_purge, []},
+ {update, snmpa_mib, soft, soft_purge, soft_purge, []},
{update, snmpa_agent, soft, soft_purge, soft_purge, []}
]
},
@@ -72,6 +80,7 @@
{load_module, snmpa_mpd, soft_purge, soft_purge, [snmpa_usm]},
{load_module, snmpa_usm, soft_purge, soft_purge, []},
{update, snmpa_supervisor, soft, soft_purge, soft_purge, []},
+ {update, snmpa_mib, soft, soft_purge, soft_purge, []},
{update, snmpa_agent, soft, soft_purge, soft_purge, []},
{load_module, snmpa_net_if, soft_purge, soft_purge, []},
@@ -135,6 +144,12 @@
%% ------D o w n g r a d e ---------------------------------------------------
[
+ {"4.17.3",
+ [
+ {update, snmpa_mib, soft, soft_purge, soft_purge, []},
+ {update, snmpa_agent, soft, soft_purge, soft_purge, []}
+ ]
+ },
{"4.17.2",
[
{load_module, snmpa, soft_purge, soft_purge, []},
@@ -143,6 +158,7 @@
{load_module, snmpa_trap, soft_purge, soft_purge, []},
{load_module, snmpa_vacm, soft_purge, soft_purge, []},
{update, snmpa_supervisor, soft, soft_purge, soft_purge, []},
+ {update, snmpa_mib, soft, soft_purge, soft_purge, []},
{update, snmpa_agent, soft, soft_purge, soft_purge, []}
]
},
@@ -154,6 +170,7 @@
{load_module, snmpa_trap, soft_purge, soft_purge, []},
{load_module, snmpa_vacm, soft_purge, soft_purge, []},
{update, snmpa_supervisor, soft, soft_purge, soft_purge, []},
+ {update, snmpa_mib, soft, soft_purge, soft_purge, []},
{update, snmpa_agent, soft, soft_purge, soft_purge, []},
{load_module, snmpm, soft_purge, soft_purge, [snmpm_server]},
{update, snmpm_server, soft, soft_purge, soft_purge, []}
@@ -167,6 +184,7 @@
{load_module, snmpa_trap, soft_purge, soft_purge, []},
{load_module, snmpa_vacm, soft_purge, soft_purge, []},
{update, snmpa_supervisor, soft, soft_purge, soft_purge, []},
+ {update, snmpa_mib, soft, soft_purge, soft_purge, []},
{update, snmpa_agent, soft, soft_purge, soft_purge, []},
{load_module, snmpa_net_if, soft_purge, soft_purge, []},
{load_module, snmpm, soft_purge, soft_purge, [snmpm_server]},
@@ -186,6 +204,7 @@
{load_module, snmpa_mpd, soft_purge, soft_purge, [snmpa_usm]},
{load_module, snmpa_usm, soft_purge, soft_purge, []},
{update, snmpa_supervisor, soft, soft_purge, soft_purge, []},
+ {update, snmpa_mib, soft, soft_purge, soft_purge, []},
{update, snmpa_agent, soft, soft_purge, soft_purge, []},
{load_module, snmpa_net_if, soft_purge, soft_purge, []},