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block: Mark bdrv_filter_bs() and callers GRAPH_RDLOCK

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This adds GRAPH_RDLOCK annotations to declare that callers of
bdrv_filter_bs() need to hold a reader lock for the graph because
it calls bdrv_filter_child(), which accesses bs->file/backing.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20231027155333.420094-4-kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf
2023-10-27 17:53:12 +02:00
parent 067179868e
commit f5a3a270fe
5 changed files with 16 additions and 4 deletions
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9
block.c
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@ -820,12 +820,17 @@ int bdrv_probe_blocksizes(BlockDriverState *bs, BlockSizes *bsz)
int bdrv_probe_geometry(BlockDriverState *bs, HDGeometry *geo)
{
BlockDriver *drv = bs->drv;
BlockDriverState *filtered = bdrv_filter_bs(bs);
BlockDriverState *filtered;
GLOBAL_STATE_CODE();
GRAPH_RDLOCK_GUARD_MAINLOOP();
if (drv && drv->bdrv_probe_geometry) {
return drv->bdrv_probe_geometry(bs, geo);
} else if (filtered) {
}
filtered = bdrv_filter_bs(bs);
if (filtered) {
return bdrv_probe_geometry(filtered, geo);
}