db6283385c
bdrv_swap() touches the fields of a BlockDriverState that are protected by the ThrottleGroup lock. Although those fields end up in their original place, they are temporarily swapped in the process, so there's a chance that an operation on a member of the same group happening on a different thread can try to use them. Signed-off-by: Alberto Garcia <berto@igalia.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: d92dc40d7c4f1fc5cda5cbbf4ffb7a4670b79d17.1433779731.git.berto@igalia.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
47 lines
1.6 KiB
C
47 lines
1.6 KiB
C
/*
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* QEMU block throttling group infrastructure
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*
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* Copyright (C) Nodalink, EURL. 2014
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* Copyright (C) Igalia, S.L. 2015
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*
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* Authors:
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* Benoît Canet <benoit.canet@nodalink.com>
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* Alberto Garcia <berto@igalia.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 or
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* (at your option) version 3 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef THROTTLE_GROUPS_H
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#define THROTTLE_GROUPS_H
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#include "qemu/throttle.h"
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#include "block/block_int.h"
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const char *throttle_group_get_name(BlockDriverState *bs);
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void throttle_group_config(BlockDriverState *bs, ThrottleConfig *cfg);
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void throttle_group_get_config(BlockDriverState *bs, ThrottleConfig *cfg);
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void throttle_group_register_bs(BlockDriverState *bs, const char *groupname);
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void throttle_group_unregister_bs(BlockDriverState *bs);
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void coroutine_fn throttle_group_co_io_limits_intercept(BlockDriverState *bs,
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unsigned int bytes,
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bool is_write);
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void throttle_group_lock(BlockDriverState *bs);
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void throttle_group_unlock(BlockDriverState *bs);
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#endif
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