[RFC v9 11/11] vhost: drop head based APIs

Eugenio Pérez
2020-06-19T18:24:05Z

Everyone's using buf APIs, no need for head based ones anymore.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
---
drivers/vhost/vhost.c | 58 +++----------------------------------------
drivers/vhost/vhost.h | 12 ---------
2 files changed, 4 insertions(+), 66 deletions(-)

diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index e227e0667790..736fa1a3cee5 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -2423,39 +2423,11 @@ EXPORT_SYMBOL_GPL(vhost_get_avail_buf);
/* Reverse the effect of vhost_get_avail_buf. Useful for error handling. */
void vhost_discard_avail_bufs(struct vhost_virtqueue *vq,
struct vhost_buf *buf, unsigned count)
-{
- vhost_discard_vq_desc(vq, count);
-}
-EXPORT_SYMBOL_GPL(vhost_discard_avail_bufs);
-
-/* This function returns the descriptor number found, or vq->num (which is
- * never a valid descriptor number) if none was found. A negative code is
- * returned on error. */
-int vhost_get_vq_desc(struct vhost_virtqueue *vq,
- struct iovec iov[], unsigned int iov_size,
- unsigned int *out_num, unsigned int *in_num,
- struct vhost_log *log, unsigned int *log_num)
-{
- struct vhost_buf buf;
- int ret = vhost_get_avail_buf(vq, &buf,
- iov, iov_size, out_num, in_num,
- log, log_num);
-
- if (likely(ret > 0))
- return buf.id;
- if (likely(!ret))
- return vq->num;
- return ret;
-}
-EXPORT_SYMBOL_GPL(vhost_get_vq_desc);
-
-/* Reverse the effect of vhost_get_vq_desc. Useful for error handling. */
-void vhost_discard_vq_desc(struct vhost_virtqueue *vq, int n)
{
unfetch_descs(vq);
- vq->last_avail_idx -= n;
+ vq->last_avail_idx -= count;
}
-EXPORT_SYMBOL_GPL(vhost_discard_vq_desc);
+EXPORT_SYMBOL_GPL(vhost_discard_avail_bufs);

static int __vhost_add_used_n(struct vhost_virtqueue *vq,
struct vring_used_elem *heads,
@@ -2491,7 +2463,7 @@ static int __vhost_add_used_n(struct vhost_virtqueue *vq,

/* After we've used one of their buffers, we tell them about it. We'll then
* want to notify the guest, using eventfd. */
-int vhost_add_used_n(struct vhost_virtqueue *vq, struct vring_used_elem *heads,
+static int vhost_add_used_n(struct vhost_virtqueue *vq, struct vring_used_elem *heads,
unsigned count)
{
int start, n, r;
@@ -2524,11 +2496,10 @@ int vhost_add_used_n(struct vhost_virtqueue *vq, struct vring_used_elem *heads,
}
return r;
}
-EXPORT_SYMBOL_GPL(vhost_add_used_n);

/* After we've used one of their buffers, we tell them about it. We'll then
* want to notify the guest, using eventfd. */
-int vhost_add_used(struct vhost_virtqueue *vq, unsigned int head, int len)
+static int vhost_add_used(struct vhost_virtqueue *vq, unsigned int head, int len)
{
struct vring_used_elem heads = {
cpu_to_vhost32(vq, head),
@@ -2537,7 +2508,6 @@ int vhost_add_used(struct vhost_virtqueue *vq, unsigned int head, int len)

return vhost_add_used_n(vq, &heads, 1);
}
-EXPORT_SYMBOL_GPL(vhost_add_used);

int vhost_put_used_buf(struct vhost_virtqueue *vq, struct vhost_buf *buf)
{
@@ -2605,26 +2575,6 @@ void vhost_signal(struct vhost_dev *dev, struct vhost_virtqueue *vq)
}
EXPORT_SYMBOL_GPL(vhost_signal);

-/* And here's the combo meal deal. Supersize me! */
-void vhost_add_used_and_signal(struct vhost_dev *dev,
- struct vhost_virtqueue *vq,
- unsigned int head, int len)
-{
- vhost_add_used(vq, head, len);
- vhost_signal(dev, vq);
-}
-EXPORT_SYMBOL_GPL(vhost_add_used_and_signal);
-
-/* multi-buffer version of vhost_add_used_and_signal */
-void vhost_add_used_and_signal_n(struct vhost_dev *dev,
- struct vhost_virtqueue *vq,
- struct vring_used_elem *heads, unsigned count)
-{
- vhost_add_used_n(vq, heads, count);
- vhost_signal(dev, vq);
-}
-EXPORT_SYMBOL_GPL(vhost_add_used_and_signal_n);
-
/* return true if we're sure that avaiable ring is empty */
bool vhost_vq_avail_empty(struct vhost_dev *dev, struct vhost_virtqueue *vq)
{
diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h
index 28eea0155efb..264a2a2fae97 100644
--- a/drivers/vhost/vhost.h
+++ b/drivers/vhost/vhost.h
@@ -197,11 +197,6 @@ long vhost_vring_ioctl(struct vhost_dev *d, unsigned int ioctl, void __user *arg
bool vhost_vq_access_ok(struct vhost_virtqueue *vq);
bool vhost_log_access_ok(struct vhost_dev *);

-int vhost_get_vq_desc(struct vhost_virtqueue *,
- struct iovec iov[], unsigned int iov_count,
- unsigned int *out_num, unsigned int *in_num,
- struct vhost_log *log, unsigned int *log_num);
-void vhost_discard_vq_desc(struct vhost_virtqueue *, int n);
int vhost_get_avail_buf(struct vhost_virtqueue *, struct vhost_buf *buf,
struct iovec iov[], unsigned int iov_count,
unsigned int *out_num, unsigned int *in_num,
@@ -209,13 +204,6 @@ int vhost_get_avail_buf(struct vhost_virtqueue *, struct vhost_buf *buf,
void vhost_discard_avail_bufs(struct vhost_virtqueue *,
struct vhost_buf *, unsigned count);
int vhost_vq_init_access(struct vhost_virtqueue *);
-int vhost_add_used(struct vhost_virtqueue *, unsigned int head, int len);
-int vhost_add_used_n(struct vhost_virtqueue *, struct vring_used_elem *heads,
- unsigned count);
-void vhost_add_used_and_signal(struct vhost_dev *, struct vhost_virtqueue *,
- unsigned int id, int len);
-void vhost_add_used_and_signal_n(struct vhost_dev *, struct vhost_virtqueue *,
- struct vring_used_elem *heads, unsigned count);
int vhost_put_used_buf(struct vhost_virtqueue *, struct vhost_buf *buf);
int vhost_put_used_n_bufs(struct vhost_virtqueue *,
struct vhost_buf *bufs, unsigned count);
--
2.18.1