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block/copy-before-write.h: global state API + assertions

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copy-before-write functions always run under BQL.

Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Message-Id: <20220303151616.325444-24-eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Emanuele Giuseppe Esposito 2022-03-03 10:16:08 -05:00 committed by Kevin Wolf
parent 6b573efec8
commit 377cc15bf1
2 changed files with 9 additions and 0 deletions
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2
block/copy-before-write.c
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@ -223,6 +223,7 @@ BlockDriverState *bdrv_cbw_append(BlockDriverState *source,
QDict *opts;
assert(source->total_sectors == target->total_sectors);
GLOBAL_STATE_CODE();
opts = qdict_new();
qdict_put_str(opts, "driver", "copy-before-write");
@ -245,6 +246,7 @@ BlockDriverState *bdrv_cbw_append(BlockDriverState *source,
void bdrv_cbw_drop(BlockDriverState *bs)
{
GLOBAL_STATE_CODE();
bdrv_drop_filter(bs, &error_abort);
bdrv_unref(bs);
}

7
block/copy-before-write.h
View File

@ -29,6 +29,13 @@
#include "block/block_int.h"
#include "block/block-copy.h"
/*
* Global state (GS) API. These functions run under the BQL.
*
* See include/block/block-global-state.h for more information about
* the GS API.
*/
BlockDriverState *bdrv_cbw_append(BlockDriverState *source,
BlockDriverState *target,
const char *filter_node_name,