| Message ID | 20160601015223.19277-1-famz@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 01/06/2016 03:52, Fam Zheng wrote: > Similar to the "!drv || !drv->bdrv_aio_ioctl" case above, here it is > okay to set co.ret and return. As pointed out by Paolo, a BH will be > created as necessary by the caller (bdrv_co_maybe_schedule_bh). > Besides, as pointed out by Kevin, "data" was leaked before. > > Reported-by: Kevin Wolf <kwolf@redhat.com> > Reported-by: Paolo Bonzini <pbonzini@redhat.com> > Signed-off-by: Fam Zheng <famz@redhat.com> > --- > block/io.c | 20 ++------------------ > 1 file changed, 2 insertions(+), 18 deletions(-) > > diff --git a/block/io.c b/block/io.c > index 2d832aa..c32f5b7 100644 > --- a/block/io.c > +++ b/block/io.c > @@ -2309,19 +2309,6 @@ int bdrv_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors) > return rwco.ret; > } > > -typedef struct { > - CoroutineIOCompletion *co; > - QEMUBH *bh; > -} BdrvIoctlCompletionData; > - > -static void bdrv_ioctl_bh_cb(void *opaque) > -{ > - BdrvIoctlCompletionData *data = opaque; > - > - bdrv_co_io_em_complete(data->co, -ENOTSUP); > - qemu_bh_delete(data->bh); > -} > - > static int bdrv_co_do_ioctl(BlockDriverState *bs, int req, void *buf) > { > BlockDriver *drv = bs->drv; > @@ -2339,11 +2326,8 @@ static int bdrv_co_do_ioctl(BlockDriverState *bs, int req, void *buf) > > acb = drv->bdrv_aio_ioctl(bs, req, buf, bdrv_co_io_em_complete, &co); > if (!acb) { > - BdrvIoctlCompletionData *data = g_new(BdrvIoctlCompletionData, 1); > - data->bh = aio_bh_new(bdrv_get_aio_context(bs), > - bdrv_ioctl_bh_cb, data); > - data->co = &co; > - qemu_bh_schedule(data->bh); > + co.ret = -ENOTSUP; > + goto out; > } > qemu_coroutine_yield(); > out: > Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
On Wed, Jun 01, 2016 at 09:52:23AM +0800, Fam Zheng wrote: > Similar to the "!drv || !drv->bdrv_aio_ioctl" case above, here it is > okay to set co.ret and return. As pointed out by Paolo, a BH will be > created as necessary by the caller (bdrv_co_maybe_schedule_bh). > Besides, as pointed out by Kevin, "data" was leaked before. > > Reported-by: Kevin Wolf <kwolf@redhat.com> > Reported-by: Paolo Bonzini <pbonzini@redhat.com> > Signed-off-by: Fam Zheng <famz@redhat.com> > --- > block/io.c | 20 ++------------------ > 1 file changed, 2 insertions(+), 18 deletions(-) Thanks, applied to my block tree: https://github.com/stefanha/qemu/commits/block Stefan
diff --git a/block/io.c b/block/io.c index 2d832aa..c32f5b7 100644 --- a/block/io.c +++ b/block/io.c @@ -2309,19 +2309,6 @@ int bdrv_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors) return rwco.ret; } -typedef struct { - CoroutineIOCompletion *co; - QEMUBH *bh; -} BdrvIoctlCompletionData; - -static void bdrv_ioctl_bh_cb(void *opaque) -{ - BdrvIoctlCompletionData *data = opaque; - - bdrv_co_io_em_complete(data->co, -ENOTSUP); - qemu_bh_delete(data->bh); -} - static int bdrv_co_do_ioctl(BlockDriverState *bs, int req, void *buf) { BlockDriver *drv = bs->drv; @@ -2339,11 +2326,8 @@ static int bdrv_co_do_ioctl(BlockDriverState *bs, int req, void *buf) acb = drv->bdrv_aio_ioctl(bs, req, buf, bdrv_co_io_em_complete, &co); if (!acb) { - BdrvIoctlCompletionData *data = g_new(BdrvIoctlCompletionData, 1); - data->bh = aio_bh_new(bdrv_get_aio_context(bs), - bdrv_ioctl_bh_cb, data); - data->co = &co; - qemu_bh_schedule(data->bh); + co.ret = -ENOTSUP; + goto out; } qemu_coroutine_yield(); out:
Similar to the "!drv || !drv->bdrv_aio_ioctl" case above, here it is okay to set co.ret and return. As pointed out by Paolo, a BH will be created as necessary by the caller (bdrv_co_maybe_schedule_bh). Besides, as pointed out by Kevin, "data" was leaked before. Reported-by: Kevin Wolf <kwolf@redhat.com> Reported-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Fam Zheng <famz@redhat.com> --- block/io.c | 20 ++------------------ 1 file changed, 2 insertions(+), 18 deletions(-)