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Automatic session quota upgrades for RM connections

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Fix #2838
This commit is contained in:
Emery Hemingway 2018-05-24 09:40:57 +02:00 committed by Norman Feske
parent 366913c146
commit 98f1d83194
1 changed files with 21 additions and 1 deletions
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22
repos/base/include/rm_session/connection.h
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@ -5,7 +5,7 @@
*/
/*
* Copyright (C) 2008-2017 Genode Labs GmbH
* Copyright (C) 2008-2018 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU Affero General Public License version 3.
@ -16,6 +16,7 @@
#include <rm_session/client.h>
#include <base/connection.h>
#include <util/retry.h>
namespace Genode { struct Rm_connection; }
@ -46,6 +47,25 @@ struct Genode::Rm_connection : Connection<Rm_session>, Rm_session_client
Connection<Rm_session>(session("ram_quota=%u, cap_quota=%u", RAM_QUOTA, CAP_QUOTA)),
Rm_session_client(cap())
{ }
/**
* Wrapper over 'create' that handles resource requests
* from the server.
*/
Capability<Region_map> create(size_t size) override
{
enum { UPGRADE_ATTEMPTS = 16U };
return Genode::retry<Out_of_ram>(
[&] () {
return Genode::retry<Out_of_caps>(
[&] () { return Rm_session_client::create(size); },
[&] () { upgrade_caps(2); },
UPGRADE_ATTEMPTS);
},
[&] () { upgrade_ram(8*1024); },
UPGRADE_ATTEMPTS);
}
};
#endif /* _INCLUDE__RM_SESSION__CONNECTION_H_ */