qemu/block/write-threshold.c
Markus Armbruster e2c1c34f13 include/block: Untangle inclusion loops
We have two inclusion loops:

       block/block.h
    -> block/block-global-state.h
    -> block/block-common.h
    -> block/blockjob.h
    -> block/block.h

       block/block.h
    -> block/block-io.h
    -> block/block-common.h
    -> block/blockjob.h
    -> block/block.h

I believe these go back to Emanuele's reorganization of the block API,
merged a few months ago in commit d7e2fe4aac.

Fortunately, breaking them is merely a matter of deleting unnecessary
includes from headers, and adding them back in places where they are
now missing.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20221221133551.3967339-2-armbru@redhat.com>
2023-01-20 07:24:28 +01:00

65 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-io.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);
}
}