Message ID | 20240516025753.130171-2-fengli@smartx.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show |
Series | [v4,1/2] Revert "vhost-user: fix lost reconnect" | expand |
On Wed, May 15, 2024 at 10:58 PM Li Feng <fengli@smartx.com> wrote: > > This reverts commit f02a4b8e6431598612466f76aac64ab492849abf. > > Since the current patch cannot completely fix the lost reconnect > problem, there is a scenario that is not considered: > - When the virtio-blk driver is removed from the guest os, > s->connected has no chance to be set to false, resulting in > subsequent reconnection not being executed. > > The next patch will completely fix this issue with a better approach. > Reviewed-by: Raphael Norwitz <raphael@enfabrica.net> > Signed-off-by: Li Feng <fengli@smartx.com> > --- > hw/block/vhost-user-blk.c | 2 +- > hw/scsi/vhost-user-scsi.c | 3 +-- > hw/virtio/vhost-user-base.c | 2 +- > hw/virtio/vhost-user.c | 10 ++-------- > include/hw/virtio/vhost-user.h | 3 +-- > 5 files changed, 6 insertions(+), 14 deletions(-) > > diff --git a/hw/block/vhost-user-blk.c b/hw/block/vhost-user-blk.c > index 9e6bbc6950..41d1ac3a5a 100644 > --- a/hw/block/vhost-user-blk.c > +++ b/hw/block/vhost-user-blk.c > @@ -384,7 +384,7 @@ static void vhost_user_blk_event(void *opaque, QEMUChrEvent event) > case CHR_EVENT_CLOSED: > /* defer close until later to avoid circular close */ > vhost_user_async_close(dev, &s->chardev, &s->dev, > - vhost_user_blk_disconnect, vhost_user_blk_event); > + vhost_user_blk_disconnect); > break; > case CHR_EVENT_BREAK: > case CHR_EVENT_MUX_IN: > diff --git a/hw/scsi/vhost-user-scsi.c b/hw/scsi/vhost-user-scsi.c > index a63b1f4948..48a59e020e 100644 > --- a/hw/scsi/vhost-user-scsi.c > +++ b/hw/scsi/vhost-user-scsi.c > @@ -214,8 +214,7 @@ static void vhost_user_scsi_event(void *opaque, QEMUChrEvent event) > case CHR_EVENT_CLOSED: > /* defer close until later to avoid circular close */ > vhost_user_async_close(dev, &vs->conf.chardev, &vsc->dev, > - vhost_user_scsi_disconnect, > - vhost_user_scsi_event); > + vhost_user_scsi_disconnect); > break; > case CHR_EVENT_BREAK: > case CHR_EVENT_MUX_IN: > diff --git a/hw/virtio/vhost-user-base.c b/hw/virtio/vhost-user-base.c > index a83167191e..4b54255682 100644 > --- a/hw/virtio/vhost-user-base.c > +++ b/hw/virtio/vhost-user-base.c > @@ -254,7 +254,7 @@ static void vub_event(void *opaque, QEMUChrEvent event) > case CHR_EVENT_CLOSED: > /* defer close until later to avoid circular close */ > vhost_user_async_close(dev, &vub->chardev, &vub->vhost_dev, > - vub_disconnect, vub_event); > + vub_disconnect); > break; > case CHR_EVENT_BREAK: > case CHR_EVENT_MUX_IN: > diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c > index cdf9af4a4b..c929097e87 100644 > --- a/hw/virtio/vhost-user.c > +++ b/hw/virtio/vhost-user.c > @@ -2776,7 +2776,6 @@ typedef struct { > DeviceState *dev; > CharBackend *cd; > struct vhost_dev *vhost; > - IOEventHandler *event_cb; > } VhostAsyncCallback; > > static void vhost_user_async_close_bh(void *opaque) > @@ -2791,10 +2790,7 @@ static void vhost_user_async_close_bh(void *opaque) > */ > if (vhost->vdev) { > data->cb(data->dev); > - } else if (data->event_cb) { > - qemu_chr_fe_set_handlers(data->cd, NULL, NULL, data->event_cb, > - NULL, data->dev, NULL, true); > - } > + } > > g_free(data); > } > @@ -2806,8 +2802,7 @@ static void vhost_user_async_close_bh(void *opaque) > */ > void vhost_user_async_close(DeviceState *d, > CharBackend *chardev, struct vhost_dev *vhost, > - vu_async_close_fn cb, > - IOEventHandler *event_cb) > + vu_async_close_fn cb) > { > if (!runstate_check(RUN_STATE_SHUTDOWN)) { > /* > @@ -2823,7 +2818,6 @@ void vhost_user_async_close(DeviceState *d, > data->dev = d; > data->cd = chardev; > data->vhost = vhost; > - data->event_cb = event_cb; > > /* Disable any further notifications on the chardev */ > qemu_chr_fe_set_handlers(chardev, > diff --git a/include/hw/virtio/vhost-user.h b/include/hw/virtio/vhost-user.h > index d7c09ffd34..324cd8663a 100644 > --- a/include/hw/virtio/vhost-user.h > +++ b/include/hw/virtio/vhost-user.h > @@ -108,7 +108,6 @@ typedef void (*vu_async_close_fn)(DeviceState *cb); > > void vhost_user_async_close(DeviceState *d, > CharBackend *chardev, struct vhost_dev *vhost, > - vu_async_close_fn cb, > - IOEventHandler *event_cb); > + vu_async_close_fn cb); > > #endif > -- > 2.45.0 >
diff --git a/hw/block/vhost-user-blk.c b/hw/block/vhost-user-blk.c index 9e6bbc6950..41d1ac3a5a 100644 --- a/hw/block/vhost-user-blk.c +++ b/hw/block/vhost-user-blk.c @@ -384,7 +384,7 @@ static void vhost_user_blk_event(void *opaque, QEMUChrEvent event) case CHR_EVENT_CLOSED: /* defer close until later to avoid circular close */ vhost_user_async_close(dev, &s->chardev, &s->dev, - vhost_user_blk_disconnect, vhost_user_blk_event); + vhost_user_blk_disconnect); break; case CHR_EVENT_BREAK: case CHR_EVENT_MUX_IN: diff --git a/hw/scsi/vhost-user-scsi.c b/hw/scsi/vhost-user-scsi.c index a63b1f4948..48a59e020e 100644 --- a/hw/scsi/vhost-user-scsi.c +++ b/hw/scsi/vhost-user-scsi.c @@ -214,8 +214,7 @@ static void vhost_user_scsi_event(void *opaque, QEMUChrEvent event) case CHR_EVENT_CLOSED: /* defer close until later to avoid circular close */ vhost_user_async_close(dev, &vs->conf.chardev, &vsc->dev, - vhost_user_scsi_disconnect, - vhost_user_scsi_event); + vhost_user_scsi_disconnect); break; case CHR_EVENT_BREAK: case CHR_EVENT_MUX_IN: diff --git a/hw/virtio/vhost-user-base.c b/hw/virtio/vhost-user-base.c index a83167191e..4b54255682 100644 --- a/hw/virtio/vhost-user-base.c +++ b/hw/virtio/vhost-user-base.c @@ -254,7 +254,7 @@ static void vub_event(void *opaque, QEMUChrEvent event) case CHR_EVENT_CLOSED: /* defer close until later to avoid circular close */ vhost_user_async_close(dev, &vub->chardev, &vub->vhost_dev, - vub_disconnect, vub_event); + vub_disconnect); break; case CHR_EVENT_BREAK: case CHR_EVENT_MUX_IN: diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c index cdf9af4a4b..c929097e87 100644 --- a/hw/virtio/vhost-user.c +++ b/hw/virtio/vhost-user.c @@ -2776,7 +2776,6 @@ typedef struct { DeviceState *dev; CharBackend *cd; struct vhost_dev *vhost; - IOEventHandler *event_cb; } VhostAsyncCallback; static void vhost_user_async_close_bh(void *opaque) @@ -2791,10 +2790,7 @@ static void vhost_user_async_close_bh(void *opaque) */ if (vhost->vdev) { data->cb(data->dev); - } else if (data->event_cb) { - qemu_chr_fe_set_handlers(data->cd, NULL, NULL, data->event_cb, - NULL, data->dev, NULL, true); - } + } g_free(data); } @@ -2806,8 +2802,7 @@ static void vhost_user_async_close_bh(void *opaque) */ void vhost_user_async_close(DeviceState *d, CharBackend *chardev, struct vhost_dev *vhost, - vu_async_close_fn cb, - IOEventHandler *event_cb) + vu_async_close_fn cb) { if (!runstate_check(RUN_STATE_SHUTDOWN)) { /* @@ -2823,7 +2818,6 @@ void vhost_user_async_close(DeviceState *d, data->dev = d; data->cd = chardev; data->vhost = vhost; - data->event_cb = event_cb; /* Disable any further notifications on the chardev */ qemu_chr_fe_set_handlers(chardev, diff --git a/include/hw/virtio/vhost-user.h b/include/hw/virtio/vhost-user.h index d7c09ffd34..324cd8663a 100644 --- a/include/hw/virtio/vhost-user.h +++ b/include/hw/virtio/vhost-user.h @@ -108,7 +108,6 @@ typedef void (*vu_async_close_fn)(DeviceState *cb); void vhost_user_async_close(DeviceState *d, CharBackend *chardev, struct vhost_dev *vhost, - vu_async_close_fn cb, - IOEventHandler *event_cb); + vu_async_close_fn cb); #endif
This reverts commit f02a4b8e6431598612466f76aac64ab492849abf. Since the current patch cannot completely fix the lost reconnect problem, there is a scenario that is not considered: - When the virtio-blk driver is removed from the guest os, s->connected has no chance to be set to false, resulting in subsequent reconnection not being executed. The next patch will completely fix this issue with a better approach. Signed-off-by: Li Feng <fengli@smartx.com> --- hw/block/vhost-user-blk.c | 2 +- hw/scsi/vhost-user-scsi.c | 3 +-- hw/virtio/vhost-user-base.c | 2 +- hw/virtio/vhost-user.c | 10 ++-------- include/hw/virtio/vhost-user.h | 3 +-- 5 files changed, 6 insertions(+), 14 deletions(-)