| Message ID | 20210128144127.113245-6-sgarzare@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | vdpa: add vdpa simulator for block device | expand |
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> > --- > 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,
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,
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> --- include/linux/vringh.h | 11 +++++++++++ 1 file changed, 11 insertions(+)