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b49f4755c7
This is the big patch that removes aio_context_acquire()/aio_context_release() from the block layer and affected block layer users. There isn't a clean way to split this patch and the reviewers are likely the same group of people, so I decided to do it in one patch. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Paul Durrant <paul@xen.org> Message-ID: <20231205182011.1976568-7-stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
/*
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* QEMU System Emulator block write threshold notification
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*
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* Copyright Red Hat, Inc. 2014
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*
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* Authors:
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* Francesco Romani <fromani@redhat.com>
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*
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* This work is licensed under the terms of the GNU LGPL, version 2 or later.
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* See the COPYING.LIB file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include "block/block-io.h"
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#include "block/block_int.h"
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#include "block/write-threshold.h"
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#include "qapi/error.h"
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#include "qapi/qapi-commands-block-core.h"
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#include "qapi/qapi-events-block-core.h"
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uint64_t bdrv_write_threshold_get(const BlockDriverState *bs)
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{
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return bs->write_threshold_offset;
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}
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void bdrv_write_threshold_set(BlockDriverState *bs, uint64_t threshold_bytes)
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{
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bs->write_threshold_offset = threshold_bytes;
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}
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void qmp_block_set_write_threshold(const char *node_name,
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uint64_t threshold_bytes,
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Error **errp)
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{
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BlockDriverState *bs;
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bs = bdrv_find_node(node_name);
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if (!bs) {
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error_setg(errp, "Device '%s' not found", node_name);
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return;
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}
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bdrv_write_threshold_set(bs, threshold_bytes);
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}
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void bdrv_write_threshold_check_write(BlockDriverState *bs, int64_t offset,
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int64_t bytes)
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{
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int64_t end = offset + bytes;
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uint64_t wtr = bs->write_threshold_offset;
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if (wtr > 0 && end > wtr) {
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qapi_event_send_block_write_threshold(bs->node_name, end - wtr, wtr);
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/* autodisable to avoid flooding the monitor */
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bdrv_write_threshold_set(bs, 0);
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}
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}
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