Re: [PATCH RFC v2 05/10] vringh: add vringh_kiov_length() helper
From: Jason Wang <jasowang@redhat.com>
Date: 2021-02-01 06:47:38
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On 2021/1/28 下午10:41, Stefano Garzarella wrote:
This new helper returns the total number of bytes covered by a vringh_kiov. Suggested-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
quoted hunk ↗ jump to hunk
--- 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,
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