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Message-Id: <20191126100744.5083-7-prashantbhole.linux@gmail.com>
Date: Tue, 26 Nov 2019 19:07:32 +0900
From: Prashant Bhole <prashantbhole.linux@...il.com>
To: "David S . Miller" <davem@...emloft.net>,
"Michael S . Tsirkin" <mst@...hat.com>
Cc: Prashant Bhole <prashantbhole.linux@...il.com>,
Jason Wang <jasowang@...hat.com>,
Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
Jakub Kicinski <jakub.kicinski@...ronome.com>,
Jesper Dangaard Brouer <hawk@...nel.org>,
John Fastabend <john.fastabend@...il.com>,
Martin KaFai Lau <kafai@...com>,
Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
Andrii Nakryiko <andriin@...com>, netdev@...r.kernel.org,
qemu-devel@...gnu.org, kvm@...r.kernel.org
Subject: [RFC net-next 06/18] tuntap: remove usage of ptr ring in vhost_net
Remove usage of ptr ring of tuntap in vhost_net and remove the
functions exported from tuntap drivers to get ptr ring.
Signed-off-by: Prashant Bhole <prashantbhole.linux@...il.com>
---
drivers/net/tap.c | 13 -------------
drivers/net/tun.c | 13 -------------
drivers/vhost/net.c | 31 ++++---------------------------
include/linux/if_tap.h | 5 -----
include/linux/if_tun.h | 5 -----
5 files changed, 4 insertions(+), 63 deletions(-)
diff --git a/drivers/net/tap.c b/drivers/net/tap.c
index 8635cdfd7aa4..6426501b8d0e 100644
--- a/drivers/net/tap.c
+++ b/drivers/net/tap.c
@@ -1298,19 +1298,6 @@ struct socket *tap_get_socket(struct file *file)
}
EXPORT_SYMBOL_GPL(tap_get_socket);
-struct ptr_ring *tap_get_ptr_ring(struct file *file)
-{
- struct tap_queue *q;
-
- if (file->f_op != &tap_fops)
- return ERR_PTR(-EINVAL);
- q = file->private_data;
- if (!q)
- return ERR_PTR(-EBADFD);
- return &q->ring;
-}
-EXPORT_SYMBOL_GPL(tap_get_ptr_ring);
-
int tap_queue_resize(struct tap_dev *tap)
{
struct net_device *dev = tap->dev;
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 4f28f2387435..d078b4659897 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -3750,19 +3750,6 @@ struct socket *tun_get_socket(struct file *file)
}
EXPORT_SYMBOL_GPL(tun_get_socket);
-struct ptr_ring *tun_get_tx_ring(struct file *file)
-{
- struct tun_file *tfile;
-
- if (file->f_op != &tun_fops)
- return ERR_PTR(-EINVAL);
- tfile = file->private_data;
- if (!tfile)
- return ERR_PTR(-EBADFD);
- return &tfile->tx_ring;
-}
-EXPORT_SYMBOL_GPL(tun_get_tx_ring);
-
module_init(tun_init);
module_exit(tun_cleanup);
MODULE_DESCRIPTION(DRV_DESCRIPTION);
diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index 0f91b374a558..2e069d1ef946 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -122,7 +122,6 @@ struct vhost_net_virtqueue {
/* Reference counting for outstanding ubufs.
* Protected by vq mutex. Writers must also take device mutex. */
struct vhost_net_ubuf_ref *ubufs;
- struct ptr_ring *rx_ring;
struct vhost_net_buf rxq;
/* Batched XDP buffs */
struct xdp_buff *xdp;
@@ -997,8 +996,9 @@ static int peek_head_len(struct vhost_net_virtqueue *rvq, struct sock *sk)
int len = 0;
unsigned long flags;
- if (rvq->rx_ring)
- return vhost_net_buf_peek(rvq);
+ len = vhost_net_buf_peek(rvq);
+ if (len)
+ return len;
spin_lock_irqsave(&sk->sk_receive_queue.lock, flags);
head = skb_peek(&sk->sk_receive_queue);
@@ -1187,7 +1187,7 @@ static void handle_rx(struct vhost_net *net)
goto out;
}
busyloop_intr = false;
- if (nvq->rx_ring) {
+ if (!vhost_net_buf_is_empty(&nvq->rxq)) {
ctl.type = TUN_MSG_PKT;
ctl.ptr = vhost_net_buf_consume(&nvq->rxq);
msg.msg_control = &ctl;
@@ -1343,7 +1343,6 @@ static int vhost_net_open(struct inode *inode, struct file *f)
n->vqs[i].batched_xdp = 0;
n->vqs[i].vhost_hlen = 0;
n->vqs[i].sock_hlen = 0;
- n->vqs[i].rx_ring = NULL;
vhost_net_buf_init(&n->vqs[i].rxq);
}
vhost_dev_init(dev, vqs, VHOST_NET_VQ_MAX,
@@ -1372,7 +1371,6 @@ static struct socket *vhost_net_stop_vq(struct vhost_net *n,
vhost_net_disable_vq(n, vq);
vhost_net_buf_unproduce(nvq);
vq->private_data = NULL;
- nvq->rx_ring = NULL;
mutex_unlock(&vq->mutex);
return sock;
}
@@ -1468,25 +1466,6 @@ static struct socket *get_raw_socket(int fd)
return ERR_PTR(r);
}
-static struct ptr_ring *get_tap_ptr_ring(int fd)
-{
- struct ptr_ring *ring;
- struct file *file = fget(fd);
-
- if (!file)
- return NULL;
- ring = tun_get_tx_ring(file);
- if (!IS_ERR(ring))
- goto out;
- ring = tap_get_ptr_ring(file);
- if (!IS_ERR(ring))
- goto out;
- ring = NULL;
-out:
- fput(file);
- return ring;
-}
-
static struct socket *get_tap_socket(int fd)
{
struct file *file = fget(fd);
@@ -1570,8 +1549,6 @@ static long vhost_net_set_backend(struct vhost_net *n, unsigned index, int fd)
r = vhost_net_enable_vq(n, vq);
if (r)
goto err_used;
- if (index == VHOST_NET_VQ_RX)
- nvq->rx_ring = get_tap_ptr_ring(fd);
oldubufs = nvq->ubufs;
nvq->ubufs = ubufs;
diff --git a/include/linux/if_tap.h b/include/linux/if_tap.h
index 915a187cfabd..68fe366fb185 100644
--- a/include/linux/if_tap.h
+++ b/include/linux/if_tap.h
@@ -4,7 +4,6 @@
#if IS_ENABLED(CONFIG_TAP)
struct socket *tap_get_socket(struct file *);
-struct ptr_ring *tap_get_ptr_ring(struct file *file);
#else
#include <linux/err.h>
#include <linux/errno.h>
@@ -14,10 +13,6 @@ static inline struct socket *tap_get_socket(struct file *f)
{
return ERR_PTR(-EINVAL);
}
-static inline struct ptr_ring *tap_get_ptr_ring(struct file *f)
-{
- return ERR_PTR(-EINVAL);
-}
#endif /* CONFIG_TAP */
#include <net/sock.h>
diff --git a/include/linux/if_tun.h b/include/linux/if_tun.h
index bb94843e3829..f01a255e076d 100644
--- a/include/linux/if_tun.h
+++ b/include/linux/if_tun.h
@@ -44,7 +44,6 @@ struct tun_xdp_hdr {
#if defined(CONFIG_TUN) || defined(CONFIG_TUN_MODULE)
struct socket *tun_get_socket(struct file *);
-struct ptr_ring *tun_get_tx_ring(struct file *file);
bool tun_is_xdp_frame(void *ptr);
void *tun_xdp_to_ptr(void *ptr);
void *tun_ptr_to_xdp(void *ptr);
@@ -58,10 +57,6 @@ static inline struct socket *tun_get_socket(struct file *f)
{
return ERR_PTR(-EINVAL);
}
-static inline struct ptr_ring *tun_get_tx_ring(struct file *f)
-{
- return ERR_PTR(-EINVAL);
-}
static inline bool tun_is_xdp_frame(void *ptr)
{
return false;
--
2.20.1
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