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Signed-off-by: Vladimir Sementsov-Ogievskiy --- block.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) diff --git a/block.c b/block.c index 288141328e..22c5010c4d 100644 --- a/block.c +++ b/block.c @@ -2810,6 +2810,54 @@ static void bdrv_child_free(BdrvChild *child) g_free(child); } +typedef struct BdrvTrySetAioContextState { + BlockDriverState *bs; + AioContext *old_ctx; +} BdrvTrySetAioContextState; + +static void bdrv_try_set_aio_context_abort(void *opaque) +{ + BdrvTrySetAioContextState *s = opaque; + + if (bdrv_get_aio_context(s->bs) != s->old_ctx) { + bdrv_try_set_aio_context(s->bs, s->old_ctx, &error_abort); + } +} + +static TransactionActionDrv bdrv_try_set_aio_context_drv = { + .abort = bdrv_try_set_aio_context_abort, + .clean = g_free, +}; + +__attribute__((unused)) +static int bdrv_try_set_aio_context_tran(BlockDriverState *bs, + AioContext *new_ctx, + Transaction *tran, + Error **errp) +{ + AioContext *old_ctx = bdrv_get_aio_context(bs); + BdrvTrySetAioContextState *s; + int ret; + + if (old_ctx == new_ctx) { + return 0; + } + + ret = bdrv_try_set_aio_context(bs, new_ctx, errp); + if (ret < 0) { + return ret; + } + + s = g_new(BdrvTrySetAioContextState, 1); + *s = (BdrvTrySetAioContextState) { + .bs = bs, + .old_ctx = old_ctx, + }; + tran_add(tran, &bdrv_try_set_aio_context_drv, s); + + return 0; +} + typedef struct BdrvAttachChildCommonState { BdrvChild *child; AioContext *old_parent_ctx;