Am 15.12.2022 um 14:02 hat Paolo Bonzini geschrieben:
> blkdebug events can be called from either non-coroutine or coroutine
> contexts. However, suspend actions only make sense from within
> a coroutine. Currently, using those action would lead to an abort() in
> qemu_coroutine_yield() ("Co-routine is yielding to no one"). Catch them
> and print an error instead.
>
> Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
> ---
> block.c | 2 +-
> block/blkdebug.c | 10 ++++++++--
> include/block/block-io.h | 2 +-
> include/block/block_int-common.h | 3 ++-
> 4 files changed, 12 insertions(+), 5 deletions(-)
>
> diff --git a/block.c b/block.c
> index 3f2bd128570e..49c66475c73e 100644
> --- a/block.c
> +++ b/block.c
> @@ -6334,7 +6334,7 @@ BlockStatsSpecific
> *bdrv_get_specific_stats(BlockDriverState *bs)
> return drv->bdrv_get_specific_stats(bs);
> }
>
> -void bdrv_debug_event(BlockDriverState *bs, BlkdebugEvent event)
> +void coroutine_mixed_fn bdrv_debug_event(BlockDriverState *bs, BlkdebugEvent
> event)
> {
> IO_CODE();
> if (!bs || !bs->drv || !bs->drv->bdrv_debug_event) {
> diff --git a/block/blkdebug.c b/block/blkdebug.c
> index 4265ca125e25..ce297961b7db 100644
> --- a/block/blkdebug.c
> +++ b/block/blkdebug.c
> @@ -31,6 +31,7 @@
> #include "block/qdict.h"
> #include "qemu/module.h"
> #include "qemu/option.h"
> +#include "qemu/error-report.h"
> #include "qapi/qapi-visit-block-core.h"
> #include "qapi/qmp/qdict.h"
> #include "qapi/qmp/qlist.h"
> @@ -837,7 +838,7 @@ static void process_rule(BlockDriverState *bs, struct
> BlkdebugRule *rule,
> }
> }
>
> -static void blkdebug_debug_event(BlockDriverState *bs, BlkdebugEvent event)
> +static void coroutine_mixed_fn blkdebug_debug_event(BlockDriverState *bs,
> BlkdebugEvent event)
> {
> BDRVBlkdebugState *s = bs->opaque;
> struct BlkdebugRule *rule, *next;
> @@ -855,7 +856,12 @@ static void blkdebug_debug_event(BlockDriverState *bs,
> BlkdebugEvent event)
> }
>
> while (actions_count[ACTION_SUSPEND] > 0) {
> - qemu_coroutine_yield();
> + if (qemu_in_coroutine()) {
> + qemu_coroutine_yield();
> + } else {
> + error_report("Non-coroutine event %s cannot suspend\n",
> + BlkdebugEvent_lookup.array[event]);
error_report() already adds a newline, so we shouldn't have an "\n"
here.
> + }
> actions_count[ACTION_SUSPEND]--;
> }
> }
Thanks, fixed this up and applied to the block branch.
Kevin
