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| author | Stefano Garzarella <sgarzare@redhat.com> | 2021-03-15 19:34:42 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2021-05-03 11:55:53 +0300 |
| commit | 14c9ac05ce09c8c6a89ffcca6ffb68707cba36c2 (patch) | |
| tree | 0f644ed5a53a370b95610705db52e8d1cd9cf293 /include/linux/vringh.h | |
| parent | b8c06ad4d67db56ed6bdfb685c134da74e92a2c7 (diff) | |
| download | linux-14c9ac05ce09c8c6a89ffcca6ffb68707cba36c2.tar.xz | |
vringh: add vringh_kiov_length() helper
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>
Link: https://lore.kernel.org/r/20210315163450.254396-7-sgarzare@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'include/linux/vringh.h')
| -rw-r--r-- | include/linux/vringh.h | 11 |
1 files changed, 11 insertions, 0 deletions
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, |