From: Stefano Garzarella <sgarzare@redhat.com>
To: virtualization@lists.linux-foundation.org
Cc: Stefano Garzarella <sgarzare@redhat.com>,
Xie Yongji <xieyongji@bytedance.com>,
kvm@vger.kernel.org, Laurent Vivier <lvivier@redhat.com>,
Stefan Hajnoczi <stefanha@redhat.com>,
Max Gurtovoy <mgurtovoy@nvidia.com>,
linux-kernel@vger.kernel.org, Jason Wang <jasowang@redhat.com>,
"Michael S. Tsirkin" <mst@redhat.com>
Subject: [PATCH v3 06/13] vringh: add vringh_kiov_length() helper
Date: Thu, 4 Feb 2021 18:22:23 +0100 [thread overview]
Message-ID: <20210204172230.85853-7-sgarzare@redhat.com> (raw)
In-Reply-To: <20210204172230.85853-1-sgarzare@redhat.com>
This new helper returns the total number of bytes covered by
a vringh_kiov.
Suggested-by: Jason Wang <jasowang@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
---
include/linux/vringh.h | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/include/linux/vringh.h b/include/linux/vringh.h
index 755211ebd195..84db7b8f912f 100644
--- a/include/linux/vringh.h
+++ b/include/linux/vringh.h
@@ -199,6 +199,17 @@ static inline void vringh_kiov_cleanup(struct vringh_kiov *kiov)
kiov->iov = NULL;
}
+static inline size_t vringh_kiov_length(struct vringh_kiov *kiov)
+{
+ size_t len = 0;
+ int i;
+
+ for (i = kiov->i; i < kiov->used; i++)
+ len += kiov->iov[i].iov_len;
+
+ return len;
+}
+
void vringh_kiov_advance(struct vringh_kiov *kiov, size_t len);
int vringh_getdesc_kern(struct vringh *vrh,
--
2.29.2
next prev parent reply other threads:[~2021-02-04 17:26 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-04 17:22 [PATCH v3 00/13] vdpa: add vdpa simulator for block device Stefano Garzarella
2021-02-04 17:22 ` [PATCH v3 01/13] vdpa_sim: use iova module to allocate IOVA addresses Stefano Garzarella
2021-02-04 17:22 ` [PATCH v3 02/13] vringh: add 'iotlb_lock' to synchronize iotlb accesses Stefano Garzarella
2021-02-04 17:22 ` [PATCH v3 03/13] vringh: reset kiov 'consumed' field in __vringh_iov() Stefano Garzarella
2021-02-05 3:18 ` Jason Wang
2021-02-04 17:22 ` [PATCH v3 04/13] vringh: explain more about cleaning riov and wiov Stefano Garzarella
2021-02-05 3:18 ` Jason Wang
2021-02-04 17:22 ` [PATCH v3 05/13] vringh: implement vringh_kiov_advance() Stefano Garzarella
2021-02-04 17:22 ` Stefano Garzarella [this message]
2021-02-04 17:22 ` [PATCH v3 07/13] vdpa_sim: cleanup kiovs in vdpasim_free() Stefano Garzarella
2021-02-04 17:22 ` [PATCH v3 08/13] vdpa: add return value to get_config/set_config callbacks Stefano Garzarella
2021-02-04 22:31 ` kernel test robot
2021-02-04 22:39 ` Stefano Garzarella
2021-02-05 3:20 ` Jason Wang
2021-02-05 8:48 ` Stefano Garzarella
2021-02-05 14:11 ` Michael S. Tsirkin
2021-02-05 14:17 ` Stefano Garzarella
2021-02-04 17:22 ` [PATCH v3 09/13] vhost/vdpa: remove vhost_vdpa_config_validate() Stefano Garzarella
2021-02-05 3:27 ` Jason Wang
2021-02-05 9:16 ` Stefano Garzarella
2021-02-05 13:32 ` Michael S. Tsirkin
2021-02-05 14:17 ` Stefano Garzarella
2021-02-08 4:13 ` Jason Wang
2021-02-04 17:22 ` [PATCH v3 10/13] vhost/vdpa: Remove the restriction that only supports virtio-net devices Stefano Garzarella
2021-02-04 17:22 ` [PATCH v3 11/13] vdpa: add vdpa simulator for block device Stefano Garzarella
2021-02-04 17:22 ` [PATCH v3 12/13] vdpa_sim_blk: implement ramdisk behaviour Stefano Garzarella
2021-02-04 17:22 ` [PATCH v3 13/13] vdpa_sim_blk: handle VIRTIO_BLK_T_GET_ID Stefano Garzarella
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