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vhost-user-blk: Add Error parameter to vhost_user_blk_start()

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Instead of letting the caller make up a meaningless error message, add
an Error parameter to allow reporting the real error.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20210609154658.350308-5-kwolf@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Reviewed-by: Raphael Norwitz <raphael.norwitz@nutanix.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2021-06-09 08:46:55 -07:00
parent f2a6e6c4fa
commit b8da65689a
1 changed files with 15 additions and 16 deletions
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31
hw/block/vhost-user-blk.c
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@ -113,7 +113,7 @@ const VhostDevConfigOps blk_ops = {
.vhost_dev_config_notifier = vhost_user_blk_handle_config_change,
};
static int vhost_user_blk_start(VirtIODevice *vdev)
static int vhost_user_blk_start(VirtIODevice *vdev, Error **errp)
{
VHostUserBlk *s = VHOST_USER_BLK(vdev);
BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev)));
@ -121,19 +121,19 @@ static int vhost_user_blk_start(VirtIODevice *vdev)
int i, ret;
if (!k->set_guest_notifiers) {
error_report("binding does not support guest notifiers");
error_setg(errp, "binding does not support guest notifiers");
return -ENOSYS;
}
ret = vhost_dev_enable_notifiers(&s->dev, vdev);
if (ret < 0) {
error_report("Error enabling host notifiers: %d", -ret);
error_setg_errno(errp, -ret, "Error enabling host notifiers");
return ret;
}
ret = k->set_guest_notifiers(qbus->parent, s->dev.nvqs, true);
if (ret < 0) {
error_report("Error binding guest notifier: %d", -ret);
error_setg_errno(errp, -ret, "Error binding guest notifier");
goto err_host_notifiers;
}
@ -141,27 +141,27 @@ static int vhost_user_blk_start(VirtIODevice *vdev)
ret = vhost_dev_prepare_inflight(&s->dev, vdev);
if (ret < 0) {
error_report("Error set inflight format: %d", -ret);
error_setg_errno(errp, -ret, "Error setting inflight format");
goto err_guest_notifiers;
}
if (!s->inflight->addr) {
ret = vhost_dev_get_inflight(&s->dev, s->queue_size, s->inflight);
if (ret < 0) {
error_report("Error get inflight: %d", -ret);
error_setg_errno(errp, -ret, "Error getting inflight");
goto err_guest_notifiers;
}
}
ret = vhost_dev_set_inflight(&s->dev, s->inflight);
if (ret < 0) {
error_report("Error set inflight: %d", -ret);
error_setg_errno(errp, -ret, "Error setting inflight");
goto err_guest_notifiers;
}
ret = vhost_dev_start(&s->dev, vdev);
if (ret < 0) {
error_report("Error starting vhost: %d", -ret);
error_setg_errno(errp, -ret, "Error starting vhost");
goto err_guest_notifiers;
}
s->started_vu = true;
@ -214,6 +214,7 @@ static void vhost_user_blk_set_status(VirtIODevice *vdev, uint8_t status)
{
VHostUserBlk *s = VHOST_USER_BLK(vdev);
bool should_start = virtio_device_started(vdev, status);
Error *local_err = NULL;
int ret;
if (!vdev->vm_running) {
@ -229,10 +230,9 @@ static void vhost_user_blk_set_status(VirtIODevice *vdev, uint8_t status)
}
if (should_start) {
ret = vhost_user_blk_start(vdev);
ret = vhost_user_blk_start(vdev, &local_err);
if (ret < 0) {
error_report("vhost-user-blk: vhost start failed: %s",
strerror(-ret));
error_reportf_err(local_err, "vhost-user-blk: vhost start failed: ");
qemu_chr_fe_disconnect(&s->chardev);
}
} else {
@ -270,6 +270,7 @@ static uint64_t vhost_user_blk_get_features(VirtIODevice *vdev,
static void vhost_user_blk_handle_output(VirtIODevice *vdev, VirtQueue *vq)
{
VHostUserBlk *s = VHOST_USER_BLK(vdev);
Error *local_err = NULL;
int i, ret;
if (!vdev->start_on_kick) {
@ -287,10 +288,9 @@ static void vhost_user_blk_handle_output(VirtIODevice *vdev, VirtQueue *vq)
/* Some guests kick before setting VIRTIO_CONFIG_S_DRIVER_OK so start
* vhost here instead of waiting for .set_status().
*/
ret = vhost_user_blk_start(vdev);
ret = vhost_user_blk_start(vdev, &local_err);
if (ret < 0) {
error_report("vhost-user-blk: vhost start failed: %s",
strerror(-ret));
error_reportf_err(local_err, "vhost-user-blk: vhost start failed: ");
qemu_chr_fe_disconnect(&s->chardev);
return;
}
@ -340,9 +340,8 @@ static int vhost_user_blk_connect(DeviceState *dev, Error **errp)
/* restore vhost state */
if (virtio_device_started(vdev, vdev->status)) {
ret = vhost_user_blk_start(vdev);
ret = vhost_user_blk_start(vdev, errp);
if (ret < 0) {
error_setg_errno(errp, -ret, "vhost start failed");
return ret;
}
}