qemu/block/write-threshold.c
Vladimir Sementsov-Ogievskiy c61ebf362d write-threshold: deal with includes
"qemu/typedefs.h" is enough for include/block/write-threshold.h header
with forward declaration of BlockDriverState. Also drop extra includes
from block/write-threshold.c and tests/unit/test-write-threshold.c

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20210506090621.11848-9-vsementsov@virtuozzo.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
2021-05-14 16:14:10 +02:00

64 lines
1.7 KiB
C

/*
* QEMU System Emulator block write threshold notification
*
* Copyright Red Hat, Inc. 2014
*
* Authors:
* Francesco Romani <fromani@redhat.com>
*
* This work is licensed under the terms of the GNU LGPL, version 2 or later.
* See the COPYING.LIB file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "block/block_int.h"
#include "block/write-threshold.h"
#include "qapi/error.h"
#include "qapi/qapi-commands-block-core.h"
#include "qapi/qapi-events-block-core.h"
uint64_t bdrv_write_threshold_get(const BlockDriverState *bs)
{
return bs->write_threshold_offset;
}
void bdrv_write_threshold_set(BlockDriverState *bs, uint64_t threshold_bytes)
{
bs->write_threshold_offset = threshold_bytes;
}
void qmp_block_set_write_threshold(const char *node_name,
uint64_t threshold_bytes,
Error **errp)
{
BlockDriverState *bs;
AioContext *aio_context;
bs = bdrv_find_node(node_name);
if (!bs) {
error_setg(errp, "Device '%s' not found", node_name);
return;
}
aio_context = bdrv_get_aio_context(bs);
aio_context_acquire(aio_context);
bdrv_write_threshold_set(bs, threshold_bytes);
aio_context_release(aio_context);
}
void bdrv_write_threshold_check_write(BlockDriverState *bs, int64_t offset,
int64_t bytes)
{
int64_t end = offset + bytes;
uint64_t wtr = bs->write_threshold_offset;
if (wtr > 0 && end > wtr) {
qapi_event_send_block_write_threshold(bs->node_name, end - wtr, wtr);
/* autodisable to avoid flooding the monitor */
bdrv_write_threshold_set(bs, 0);
}
}