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| author | Dongli Zhang <dongli.zhang@oracle.com> | 2025-04-02 23:29:53 -0700 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2025-04-18 10:08:12 -0400 |
| commit | 1f69fe75a3286daf4fdaad9c5f72c7ac507d7ff0 (patch) | |
| tree | a8d7b89a1e08c6906e87713613d0d9b476927874 | |
| parent | 153edd4aa897d0a8e0849929c9f51b2ea1563952 (diff) | |
| download | vhost.tar.gz | |
vhost-scsi: log event queue write descriptorsvhosttestlinux-next
Log write descriptors for the event queue, leveraging vhost_get_vq_desc()
to retrieve the array of write descriptors to obtain the log buffer.
There is only one path for event queue.
Suggested-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com>
Reviewed-by: Mike Christie <michael.christie@oracle.com>
Message-Id: <20250403063028.16045-9-dongli.zhang@oracle.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
| -rw-r--r-- | drivers/vhost/scsi.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/vhost/scsi.c b/drivers/vhost/scsi.c index 5d41162e7d39b5..c12a0d4e6386f3 100644 --- a/drivers/vhost/scsi.c +++ b/drivers/vhost/scsi.c @@ -571,6 +571,8 @@ vhost_scsi_do_evt_work(struct vhost_scsi *vs, struct vhost_scsi_evt *evt) struct vhost_virtqueue *vq = &vs->vqs[VHOST_SCSI_VQ_EVT].vq; struct virtio_scsi_event *event = &evt->event; struct virtio_scsi_event __user *eventp; + struct vhost_log *vq_log; + unsigned int log_num; unsigned out, in; int head, ret; @@ -581,9 +583,19 @@ vhost_scsi_do_evt_work(struct vhost_scsi *vs, struct vhost_scsi_evt *evt) again: vhost_disable_notify(&vs->dev, vq); + + vq_log = unlikely(vhost_has_feature(vq, VHOST_F_LOG_ALL)) ? + vq->log : NULL; + + /* + * Reset 'log_num' since vhost_get_vq_desc() may reset it only + * after certain condition checks. + */ + log_num = 0; + head = vhost_get_vq_desc(vq, vq->iov, ARRAY_SIZE(vq->iov), &out, &in, - NULL, NULL); + vq_log, &log_num); if (head < 0) { vs->vs_events_missed = true; return; @@ -613,6 +625,8 @@ again: vhost_add_used_and_signal(&vs->dev, vq, head, 0); else vq_err(vq, "Faulted on vhost_scsi_send_event\n"); + + vhost_scsi_log_write(vq, vq_log, log_num); } static void vhost_scsi_complete_events(struct vhost_scsi *vs, bool drop) |