5366d0c8bc
This is the next step for decoupling block accounting functions from BlockDriverState. In a future commit the BlockAcctStats structure will be moved from BlockDriverState to the device models structures. Note that bdrv_get_stats was introduced so device models can retrieve the BlockAcctStats structure of a BlockDriverState without being aware of it's layout. This function should go away when BlockAcctStats will be embedded in the device models structures. CC: Kevin Wolf <kwolf@redhat.com> CC: Stefan Hajnoczi <stefanha@redhat.com> CC: Keith Busch <keith.busch@intel.com> CC: Anthony Liguori <aliguori@amazon.com> CC: "Michael S. Tsirkin" <mst@redhat.com> CC: Paolo Bonzini <pbonzini@redhat.com> CC: Eric Blake <eblake@redhat.com> CC: Peter Maydell <peter.maydell@linaro.org> CC: Michael Tokarev <mjt@tls.msk.ru> CC: John Snow <jsnow@redhat.com> CC: Markus Armbruster <armbru@redhat.com> CC: Alexander Graf <agraf@suse.de> CC: Max Reitz <mreitz@redhat.com> Signed-off-by: Benoît Canet <benoit.canet@nodalink.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
58 lines
2 KiB
C
58 lines
2 KiB
C
/*
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* QEMU System Emulator block accounting
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*
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* Copyright (c) 2011 Christoph Hellwig
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef BLOCK_ACCOUNTING_H
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#define BLOCK_ACCOUNTING_H
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#include <stdint.h>
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#include "qemu/typedefs.h"
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enum BlockAcctType {
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BLOCK_ACCT_READ,
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BLOCK_ACCT_WRITE,
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BLOCK_ACCT_FLUSH,
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BLOCK_MAX_IOTYPE,
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};
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typedef struct BlockAcctStats {
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uint64_t nr_bytes[BLOCK_MAX_IOTYPE];
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uint64_t nr_ops[BLOCK_MAX_IOTYPE];
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uint64_t total_time_ns[BLOCK_MAX_IOTYPE];
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uint64_t wr_highest_sector;
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} BlockAcctStats;
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typedef struct BlockAcctCookie {
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int64_t bytes;
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int64_t start_time_ns;
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enum BlockAcctType type;
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} BlockAcctCookie;
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void block_acct_start(BlockAcctStats *stats, BlockAcctCookie *cookie,
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int64_t bytes, enum BlockAcctType type);
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void block_acct_done(BlockAcctStats *stats, BlockAcctCookie *cookie);
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void block_acct_highest_sector(BlockAcctStats *stats, int64_t sector_num,
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unsigned int nb_sectors);
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#endif
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