From: Alexander Ivanov <alexander.ivanov@virtuozzo.com>
To: andrey.zhadchenko@virtuozzo.com
Cc: devel@openvz.org
Subject: [Devel] [PATCH hci-8.1 1/2] drivers/vhost/blk: add support for worker ioctls
Date: Thu, 29 Oct 2026 11:49:42 +0100 [thread overview]
Message-ID: <20261029104943.3311164-1-alexander.ivanov@virtuozzo.com> (raw)
Let userspace create vhost workers and bind them to vhost-blk
virtqueues with the mainstream ioctls from c1ecd8e95007 ("vhost: allow
userspace to create workers"), the same way d74b55e65502 ("vhost_scsi:
add support for worker ioctls") does it for vhost-scsi.
VHOST_NEW_WORKER needs the device in vhost_task mode, so userspace has
to issue VHOST_SET_FORK_FROM_OWNER with VHOST_FORK_OWNER_TASK before
VHOST_SET_OWNER: our fork_from_owner_default is kthread.
https://virtuozzo.atlassian.net/browse/VSTOR-107537
Feature: vhost-blk: in-kernel accelerator for virtio-blk guests
Suggested-by: Pavel Tikhomirov <ptikhomirov@virtuozzo.com>
Signed-off-by: Alexander Ivanov <alexander.ivanov@virtuozzo.com>
---
drivers/vhost/blk.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/vhost/blk.c b/drivers/vhost/blk.c
index b170439a1806..ab3b8c4c2d5a 100644
--- a/drivers/vhost/blk.c
+++ b/drivers/vhost/blk.c
@@ -909,6 +909,14 @@ static long vhost_blk_ioctl(struct file *f, unsigned int ioctl,
return vhost_blk_set_features(blk, features);
case VHOST_RESET_OWNER:
return vhost_blk_reset_owner(blk);
+ case VHOST_NEW_WORKER:
+ case VHOST_FREE_WORKER:
+ case VHOST_ATTACH_VRING_WORKER:
+ case VHOST_GET_VRING_WORKER:
+ mutex_lock(&blk->dev.mutex);
+ ret = vhost_worker_ioctl(&blk->dev, ioctl, argp);
+ mutex_unlock(&blk->dev.mutex);
+ return ret;
default:
mutex_lock(&blk->dev.mutex);
ret = vhost_dev_ioctl(&blk->dev, ioctl, argp);
--
2.53.0
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next reply other threads:[~2026-10-29 10:51 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-29 10:49 Alexander Ivanov [this message]
2026-10-29 11:05 ` Alexander Ivanov
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