On 5/4/21 10:33 AM, Stefano Garzarella wrote:
> On Wed, Apr 28, 2021 at 05:37:12PM -0500, Mike Christie wrote:
>> The next patch allows a vhost_worker to handle different devices. To
>> prepare for that, this patch adds a pointer to the device on the work so
>> we can get to the different mms in the vhost_worker thread.
>>
>> Signed-off-by: Mike Christie <[email protected]>
>> ---
>> drivers/vhost/scsi.c | 7 ++++---
>> drivers/vhost/vhost.c | 24 ++++++++++++++----------
>> drivers/vhost/vhost.h | 10 ++++++----
>> drivers/vhost/vsock.c | 3 ++-
>> 4 files changed, 26 insertions(+), 18 deletions(-)
>>
>> diff --git a/drivers/vhost/scsi.c b/drivers/vhost/scsi.c
>> index 2f84cf602ab3..0e862503b6a8 100644
>> --- a/drivers/vhost/scsi.c
>> +++ b/drivers/vhost/scsi.c
>> @@ -1808,7 +1808,7 @@ static int vhost_scsi_open(struct inode *inode, struct
>> file *f)
>> if (!vqs)
>> goto err_vqs;
>>
>> - vhost_work_init(&vs->vs_event_work, vhost_scsi_evt_work);
>> + vhost_work_init(&vs->dev, &vs->vs_event_work, vhost_scsi_evt_work);
>>
>> vs->vs_events_nr = 0;
>> vs->vs_events_missed = false;
>> @@ -1823,7 +1823,7 @@ static int vhost_scsi_open(struct inode *inode, struct
>> file *f)
>> vqs[i] = &svq->vq;
>> svq->vs = vs;
>> init_llist_head(&svq->completion_list);
>> - vhost_work_init(&svq->completion_work,
>> + vhost_work_init(&vs->dev, &svq->completion_work,
>> vhost_scsi_complete_cmd_work);
>> svq->vq.handle_kick = vhost_scsi_handle_kick;
>> }
>> @@ -2017,7 +2017,8 @@ static int vhost_scsi_port_link(struct se_portal_group
>> *se_tpg,
>> if (!tmf)
>> return -ENOMEM;
>> INIT_LIST_HEAD(&tmf->queue_entry);
>> - vhost_work_init(&tmf->vwork, vhost_scsi_tmf_resp_work);
>> + vhost_work_init(&tpg->vhost_scsi->dev, &tmf->vwork,
>> + vhost_scsi_tmf_resp_work);
>>
>
> `checkpatch.pl --strict` complains here:
>
> CHECK: Alignment should match open parenthesis
> #74: FILE: drivers/vhost/scsi.c:2036:
> + vhost_work_init(&tpg->vhost_scsi->dev, &tmf->vwork,
> + vhost_scsi_tmf_resp_work);
>
Will fix and use strict from now on too.
>> mutex_lock(&vhost_scsi_mutex);
>>
>> diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
>> index fecdae0d18c7..7ba0c303bb98 100644
>> --- a/drivers/vhost/vhost.c
>> +++ b/drivers/vhost/vhost.c
>> @@ -181,10 +181,12 @@ static int vhost_poll_wakeup(wait_queue_entry_t *wait,
>> unsigned mode, int sync,
>> return 0;
>> }
>>
>> -void vhost_work_init(struct vhost_work *work, vhost_work_fn_t fn)
>> +void vhost_work_init(struct vhost_dev *dev, struct vhost_work *work,
>> + vhost_work_fn_t fn)
>> {
>> clear_bit(VHOST_WORK_QUEUED, &work->flags);
>> work->fn = fn;
>> + work->dev = dev;
>> }
>> EXPORT_SYMBOL_GPL(vhost_work_init);
>>
>> @@ -200,7 +202,7 @@ void vhost_poll_init(struct vhost_poll *poll,
>> vhost_work_fn_t fn,
>> poll->wqh = NULL;
>> poll->vq = vq;
>>
>> - vhost_work_init(&poll->work, fn);
>> + vhost_work_init(dev, &poll->work, fn);
>> }
>> EXPORT_SYMBOL_GPL(vhost_poll_init);
>>
>> @@ -269,12 +271,13 @@ void vhost_work_queue(struct vhost_dev *dev, struct
>> vhost_work *work)
>> }
>> EXPORT_SYMBOL_GPL(vhost_work_queue);
>>
>> -static void vhost_work_dev_flush_on(struct vhost_worker *worker)
>> +static void vhost_work_dev_flush_on(struct vhost_dev *dev,
>> + struct vhost_worker *worker)
>> {
>> struct vhost_flush_struct flush;
>>
>> init_completion(&flush.wait_event);
>> - vhost_work_init(&flush.work, vhost_flush_work);
>> + vhost_work_init(dev, &flush.work, vhost_flush_work);
>>
>> vhost_work_queue_on(&flush.work, worker);
>> wait_for_completion(&flush.wait_event);
>> @@ -285,7 +288,7 @@ void vhost_work_dev_flush(struct vhost_dev *dev)
>> int i;
>>
>> for (i = 0; i < dev->num_workers; i++)
>> - vhost_work_dev_flush_on(dev->workers[i]);
>> + vhost_work_dev_flush_on(dev, dev->workers[i]);
>> }
>> EXPORT_SYMBOL_GPL(vhost_work_dev_flush);
>>
>> @@ -305,7 +308,7 @@ EXPORT_SYMBOL_GPL(vhost_has_work);
>>
>> void vhost_vq_work_flush(struct vhost_virtqueue *vq)
>> {
>> - vhost_work_dev_flush_on(vq->worker);
>> + vhost_work_dev_flush_on(vq->dev, vq->worker);
>> }
>> EXPORT_SYMBOL_GPL(vhost_vq_work_flush);
>>
>> @@ -572,14 +575,15 @@ static void vhost_attach_cgroups_work(struct
>> vhost_work *work)
>> s->ret = cgroup_attach_task_all(s->owner, current);
>> }
>>
>> -static int vhost_attach_cgroups_on(struct vhost_worker *worker)
>> +static int vhost_attach_cgroups_on(struct vhost_dev *dev,
>> + struct vhost_worker *worker)
>> {
>> struct vhost_attach_cgroups_struct attach;
>>
>> attach.owner = current;
>> - vhost_work_init(&attach.work, vhost_attach_cgroups_work);
>> + vhost_work_init(dev, &attach.work, vhost_attach_cgroups_work);
>> vhost_work_queue_on(&attach.work, worker);
>> - vhost_work_dev_flush_on(worker);
>> + vhost_work_dev_flush_on(dev, worker);
>> return attach.ret;
>> }
>>
>> @@ -673,7 +677,7 @@ static struct vhost_worker *vhost_worker_create(struct
>> vhost_dev *dev)
>> worker->task = task;
>> wake_up_process(task); /* avoid contributing to loadavg */
>>
>> - ret = vhost_attach_cgroups_on(worker);
>> + ret = vhost_attach_cgroups_on(dev, worker);
>> if (ret)
>> goto stop_worker;
>>
>> diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h
>> index 64dc00337389..051dea4e3ab6 100644
>> --- a/drivers/vhost/vhost.h
>> +++ b/drivers/vhost/vhost.h
>> @@ -21,9 +21,10 @@ typedef void (*vhost_work_fn_t)(struct vhost_work *work);
>>
>> #define VHOST_WORK_QUEUED 1
>> struct vhost_work {
>> - struct llist_node node;
>> - vhost_work_fn_t fn;
>> - unsigned long flags;
>> + struct llist_node node;
>> + vhost_work_fn_t fn;
>> + unsigned long flags;
>
> Maybe we should move these changes in another patch since they are not
> related.
Will do.
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