1 files changed, 0 insertions, 811 deletions

diff --git a/src/dpdk_lib18/librte_eal/linuxapp/kni/kni_vhost.c b/src/dpdk_lib18/librte_eal/linuxapp/kni/kni_vhost.c
deleted file mode 100755
index 7141f833..00000000
--- a/src/dpdk_lib18/librte_eal/linuxapp/kni/kni_vhost.c
+++ /dev/null
@@ -1,811 +0,0 @@
-/*-
- * GPL LICENSE SUMMARY
- *
- *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
- *
- *   This program is free software; you can redistribute it and/or modify
- *   it under the terms of version 2 of the GNU General Public License as
- *   published by the Free Software Foundation.
- *
- *   This program is distributed in the hope that it will be useful, but
- *   WITHOUT ANY WARRANTY; without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- *   General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program; if not, write to the Free Software
- *   Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- *   The full GNU General Public License is included in this distribution
- *   in the file called LICENSE.GPL.
- *
- *   Contact Information:
- *   Intel Corporation
- */
-
-#include <linux/module.h>
-#include <linux/net.h>
-#include <net/sock.h>
-#include <linux/virtio_net.h>
-#include <linux/wait.h>
-#include <linux/mm.h>
-#include <linux/nsproxy.h>
-#include <linux/sched.h>
-#include <linux/if_tun.h>
-#include <linux/version.h>
-
-#include "compat.h"
-#include "kni_dev.h"
-#include "kni_fifo.h"
-
-#define RX_BURST_SZ 4
-
-extern void put_unused_fd(unsigned int fd);
-
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,7,0)
-extern struct file*
-sock_alloc_file(struct socket *sock,
-		int flags, const char *dname);
-
-extern int get_unused_fd_flags(unsigned flags);
-
-extern void fd_install(unsigned int fd, struct file *file);
-
-static int kni_sock_map_fd(struct socket *sock)
-{
-	struct file *file;
-	int fd = get_unused_fd_flags(0);
-	if (fd < 0)
-		return fd;
-
-	file = sock_alloc_file(sock, 0, NULL);
-	if (IS_ERR(file)) {
-		put_unused_fd(fd);
-		return PTR_ERR(file);
-	}
-	fd_install(fd, file);
-	return fd;
-}
-#else
-#define kni_sock_map_fd(s)             sock_map_fd(s, 0)
-#endif
-
-static struct proto kni_raw_proto = {
-	.name = "kni_vhost",
-	.owner = THIS_MODULE,
-	.obj_size = sizeof(struct kni_vhost_queue),
-};
-
-static inline int
-kni_vhost_net_tx(struct kni_dev *kni, struct iovec *iov,
-		 unsigned offset, unsigned len)
-{
-	struct rte_kni_mbuf *pkt_kva = NULL;
-	struct rte_kni_mbuf *pkt_va = NULL;
-	int ret;
-
-	KNI_DBG_TX("tx offset=%d, len=%d, iovlen=%d\n",
-		   offset, len, (int)iov->iov_len);
-
-	/**
-	 * Check if it has at least one free entry in tx_q and
-	 * one entry in alloc_q.
-	 */
-	if (kni_fifo_free_count(kni->tx_q) == 0 ||
-	    kni_fifo_count(kni->alloc_q) == 0) {
-		/**
-		 * If no free entry in tx_q or no entry in alloc_q,
-		 * drops skb and goes out.
-		 */
-		goto drop;
-	}
-
-	/* dequeue a mbuf from alloc_q */
-	ret = kni_fifo_get(kni->alloc_q, (void **)&pkt_va, 1);
-	if (likely(ret == 1)) {
-		void *data_kva;
-
-		pkt_kva = (void *)pkt_va - kni->mbuf_va + kni->mbuf_kva;
-		data_kva = pkt_kva->buf_addr + pkt_kva->data_off
-		           - kni->mbuf_va + kni->mbuf_kva;
-
-		memcpy_fromiovecend(data_kva, iov, offset, len);
-		if (unlikely(len < ETH_ZLEN)) {
-			memset(data_kva + len, 0, ETH_ZLEN - len);
-			len = ETH_ZLEN;
-		}
-		pkt_kva->pkt_len = len;
-		pkt_kva->data_len = len;
-
-		/* enqueue mbuf into tx_q */
-		ret = kni_fifo_put(kni->tx_q, (void **)&pkt_va, 1);
-		if (unlikely(ret != 1)) {
-			/* Failing should not happen */
-			KNI_ERR("Fail to enqueue mbuf into tx_q\n");
-			goto drop;
-		}
-	} else {
-		/* Failing should not happen */
-		KNI_ERR("Fail to dequeue mbuf from alloc_q\n");
-		goto drop;
-	}
-
-	/* update statistics */
-	kni->stats.tx_bytes += len;
-	kni->stats.tx_packets++;
-
-	return 0;
-
-drop:
-	/* update statistics */
-	kni->stats.tx_dropped++;
-
-	return 0;
-}
-
-static inline int
-kni_vhost_net_rx(struct kni_dev *kni, struct iovec *iov,
-		 unsigned offset, unsigned len)
-{
-	uint32_t pkt_len;
-	struct rte_kni_mbuf *kva;
-	struct rte_kni_mbuf *va;
-	void * data_kva;
-	struct sk_buff *skb;
-	struct kni_vhost_queue *q = kni->vhost_queue;
-
-	if (unlikely(q == NULL))
-		return 0;
-
-	/* ensure at least one entry in free_q */
-	if (unlikely(kni_fifo_free_count(kni->free_q) == 0))
-		return 0;
-
-	skb = skb_dequeue(&q->sk.sk_receive_queue);
-	if (unlikely(skb == NULL))
-		return 0;
-
-	kva = (struct rte_kni_mbuf*)skb->data;
-
-	/* free skb to cache */
-	skb->data = NULL;
-	if (unlikely(1 != kni_fifo_put(q->fifo, (void **)&skb, 1)))
-		/* Failing should not happen */
-		KNI_ERR("Fail to enqueue entries into rx cache fifo\n");
-
-	pkt_len = kva->data_len;
-	if (unlikely(pkt_len > len))
-		goto drop;
-
-	KNI_DBG_RX("rx offset=%d, len=%d, pkt_len=%d, iovlen=%d\n",
-		   offset, len, pkt_len, (int)iov->iov_len);
-
-	data_kva = kva->buf_addr + kva->data_off - kni->mbuf_va + kni->mbuf_kva;
-	if (unlikely(memcpy_toiovecend(iov, data_kva, offset, pkt_len)))
-		goto drop;
-
-	/* Update statistics */
-	kni->stats.rx_bytes += pkt_len;
-	kni->stats.rx_packets++;
-
-	/* enqueue mbufs into free_q */
-	va = (void*)kva - kni->mbuf_kva + kni->mbuf_va;
-	if (unlikely(1 != kni_fifo_put(kni->free_q, (void **)&va, 1)))
-		/* Failing should not happen */
-		KNI_ERR("Fail to enqueue entries into free_q\n");
-
-	KNI_DBG_RX("receive done %d\n", pkt_len);
-
-	return pkt_len;
-
-drop:
-	/* Update drop statistics */
-	kni->stats.rx_dropped++;
-
-	return 0;
-}
-
-static unsigned int
-kni_sock_poll(struct file *file, struct socket *sock, poll_table * wait)
-{
-	struct kni_vhost_queue *q =
-		container_of(sock->sk, struct kni_vhost_queue, sk);
-	struct kni_dev *kni;
-	unsigned int mask = 0;
-
-	if (unlikely(q == NULL || q->kni == NULL))
-		return POLLERR;
-
-	kni = q->kni;
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)
-	KNI_DBG("start kni_poll on group %d, wq 0x%16llx\n",
-		  kni->group_id, (uint64_t)sock->wq);
-#else
-	KNI_DBG("start kni_poll on group %d, wait at 0x%16llx\n",
-		  kni->group_id, (uint64_t)&sock->wait);
-#endif
-
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)
-	poll_wait(file, &sock->wq->wait, wait);
-#else
-	poll_wait(file, &sock->wait, wait);
-#endif
-
-	if (kni_fifo_count(kni->rx_q) > 0)
-		mask |= POLLIN | POLLRDNORM;
-
-	if (sock_writeable(&q->sk) ||
-	    (!test_and_set_bit(SOCK_ASYNC_NOSPACE, &q->sock->flags) &&
-	     sock_writeable(&q->sk)))
-		mask |= POLLOUT | POLLWRNORM;
-
-	return mask;
-}
-
-static inline void
-kni_vhost_enqueue(struct kni_dev *kni, struct kni_vhost_queue *q,
-		  struct sk_buff *skb, struct rte_kni_mbuf *va)
-{
-	struct rte_kni_mbuf *kva;
-
-	kva = (void *)(va) - kni->mbuf_va + kni->mbuf_kva;
-	(skb)->data = (unsigned char*)kva;
-	(skb)->len = kva->data_len;
-	skb_queue_tail(&q->sk.sk_receive_queue, skb);
-}
-
-static inline void
-kni_vhost_enqueue_burst(struct kni_dev *kni, struct kni_vhost_queue *q,
-	  struct sk_buff **skb, struct rte_kni_mbuf **va)
-{
-	int i;
-	for (i = 0; i < RX_BURST_SZ; skb++, va++, i++)
-		kni_vhost_enqueue(kni, q, *skb, *va);
-}
-
-int
-kni_chk_vhost_rx(struct kni_dev *kni)
-{
-	struct kni_vhost_queue *q = kni->vhost_queue;
-	unsigned nb_in, nb_mbuf, nb_skb;
-	const unsigned BURST_MASK = RX_BURST_SZ - 1;
-	unsigned nb_burst, nb_backlog, i;
-	struct sk_buff *skb[RX_BURST_SZ];
-	struct rte_kni_mbuf *va[RX_BURST_SZ];
-
-	if (unlikely(BE_STOP & kni->vq_status)) {
-		kni->vq_status |= BE_FINISH;
-		return 0;
-	}
-
-	if (unlikely(q == NULL))
-		return 0;
-
-	nb_skb = kni_fifo_count(q->fifo);
-	nb_mbuf = kni_fifo_count(kni->rx_q);
-
-	nb_in = min(nb_mbuf, nb_skb);
-	nb_in = min(nb_in, (unsigned)RX_BURST_SZ);
-	nb_burst   = (nb_in & ~BURST_MASK);
-	nb_backlog = (nb_in & BURST_MASK);
-
-	/* enqueue skb_queue per BURST_SIZE bulk */
-	if (0 != nb_burst) {
-		if (unlikely(RX_BURST_SZ != kni_fifo_get(
-				     kni->rx_q, (void **)&va,
-				     RX_BURST_SZ)))
-			goto except;
-
-		if (unlikely(RX_BURST_SZ != kni_fifo_get(
-				     q->fifo, (void **)&skb,
-				     RX_BURST_SZ)))
-			goto except;
-
-		kni_vhost_enqueue_burst(kni, q, skb, va);
-	}
-
-	/* all leftover, do one by one */
-	for (i = 0; i < nb_backlog; ++i) {
-		if (unlikely(1 != kni_fifo_get(
-				     kni->rx_q,(void **)&va, 1)))
-			goto except;
-
-		if (unlikely(1 != kni_fifo_get(
-				     q->fifo, (void **)&skb, 1)))
-			goto except;
-
-		kni_vhost_enqueue(kni, q, *skb, *va);
-	}
-
-	/* Ondemand wake up */
-	if ((nb_in == RX_BURST_SZ) || (nb_skb == 0) ||
-	    ((nb_mbuf < RX_BURST_SZ) && (nb_mbuf != 0))) {
-		wake_up_interruptible_poll(sk_sleep(&q->sk),
-				   POLLIN | POLLRDNORM | POLLRDBAND);
-		KNI_DBG_RX("RX CHK KICK nb_mbuf %d, nb_skb %d, nb_in %d\n",
-			   nb_mbuf, nb_skb, nb_in);
-	}
-
-	return 0;
-
-except:
-	/* Failing should not happen */
-	KNI_ERR("Fail to enqueue fifo, it shouldn't happen \n");
-	BUG_ON(1);
-
-	return 0;
-}
-
-static int
-kni_sock_sndmsg(struct kiocb *iocb, struct socket *sock,
-	   struct msghdr *m, size_t total_len)
-{
- 	struct kni_vhost_queue *q =
-		container_of(sock->sk, struct kni_vhost_queue, sk);
-	int vnet_hdr_len = 0;
-	unsigned long len = total_len;
-
-	if (unlikely(q == NULL || q->kni == NULL))
-		return 0;
-
-	KNI_DBG_TX("kni_sndmsg len %ld, flags 0x%08x, nb_iov %d\n",
-		   len, q->flags, (int)m->msg_iovlen);
-
-#ifdef RTE_KNI_VHOST_VNET_HDR_EN
-	if (likely(q->flags & IFF_VNET_HDR)) {
-		vnet_hdr_len = q->vnet_hdr_sz;
-		if (unlikely(len < vnet_hdr_len))
-			return -EINVAL;
-		len -= vnet_hdr_len;
-	}
-#endif
-
-	if (unlikely(len < ETH_HLEN + q->vnet_hdr_sz))
-		return -EINVAL;
-
-	return kni_vhost_net_tx(q->kni, m->msg_iov, vnet_hdr_len, len);
-}
-
-static int
-kni_sock_rcvmsg(struct kiocb *iocb, struct socket *sock,
-	   struct msghdr *m, size_t len, int flags)
-{
-	int vnet_hdr_len = 0;
-	int pkt_len = 0;
-	struct kni_vhost_queue *q =
-		container_of(sock->sk, struct kni_vhost_queue, sk);
-	static struct virtio_net_hdr
-		__attribute__ ((unused)) vnet_hdr = {
-		.flags = 0,
-		.gso_type = VIRTIO_NET_HDR_GSO_NONE
-	};
-
-	if (unlikely(q == NULL || q->kni == NULL))
-		return 0;
-
-#ifdef RTE_KNI_VHOST_VNET_HDR_EN
-	if (likely(q->flags & IFF_VNET_HDR)) {
-		vnet_hdr_len = q->vnet_hdr_sz;
-		if ((len -= vnet_hdr_len) < 0)
-			return -EINVAL;
-	}
-#endif
-
-	if (unlikely(0 == (pkt_len = kni_vhost_net_rx(q->kni,
-		m->msg_iov, vnet_hdr_len, len))))
-		return 0;
-
-#ifdef RTE_KNI_VHOST_VNET_HDR_EN
-	/* no need to copy hdr when no pkt received */
-	if (unlikely(memcpy_toiovecend(m->msg_iov,
-		(void *)&vnet_hdr, 0, vnet_hdr_len)))
-		return -EFAULT;
-#endif
-	KNI_DBG_RX("kni_rcvmsg expect_len %ld, flags 0x%08x, pkt_len %d\n",
-		   (unsigned long)len, q->flags, pkt_len);
-
-	return (pkt_len + vnet_hdr_len);
-}
-
-/* dummy tap like ioctl */
-static int
-kni_sock_ioctl(struct socket *sock, unsigned int cmd,
-	      unsigned long arg)
-{
-	void __user *argp = (void __user *)arg;
-	struct ifreq __user *ifr = argp;
-	unsigned int __user *up = argp;
-	struct kni_vhost_queue *q =
-		container_of(sock->sk, struct kni_vhost_queue, sk);
-	struct kni_dev *kni;
-	unsigned int u;
-	int __user *sp = argp;
-	int s;
-	int ret;
-
-	KNI_DBG("tap ioctl cmd 0x%08x\n", cmd);
-
-	switch (cmd) {
-	case TUNSETIFF:
-		KNI_DBG("TUNSETIFF\n");
-		/* ignore the name, just look at flags */
-		if (get_user(u, &ifr->ifr_flags))
-			return -EFAULT;
-
-		ret = 0;
-		if ((u & ~IFF_VNET_HDR) != (IFF_NO_PI | IFF_TAP))
-			ret = -EINVAL;
-		else
-			q->flags = u;
-
-		return ret;
-
-	case TUNGETIFF:
-		KNI_DBG("TUNGETIFF\n");
-		rcu_read_lock_bh();
-		kni = rcu_dereference_bh(q->kni);
-		if (kni)
-			dev_hold(kni->net_dev);
-		rcu_read_unlock_bh();
-
-		if (!kni)
-			return -ENOLINK;
-
-		ret = 0;
-		if (copy_to_user(&ifr->ifr_name, kni->net_dev->name, IFNAMSIZ) ||
-		    put_user(q->flags, &ifr->ifr_flags))
-			ret = -EFAULT;
-		dev_put(kni->net_dev);
-		return ret;
-
-	case TUNGETFEATURES:
-		KNI_DBG("TUNGETFEATURES\n");
-		u = IFF_TAP | IFF_NO_PI;
-#ifdef RTE_KNI_VHOST_VNET_HDR_EN
-		u |= IFF_VNET_HDR;
-#endif
-		if (put_user(u, up))
-			return -EFAULT;
-		return 0;
-
-	case TUNSETSNDBUF:
-		KNI_DBG("TUNSETSNDBUF\n");
-		if (get_user(u, up))
-			return -EFAULT;
-
-		q->sk.sk_sndbuf = u;
-		return 0;
-
-	case TUNGETVNETHDRSZ:
-		s = q->vnet_hdr_sz;
-		if (put_user(s, sp))
-			return -EFAULT;
-		KNI_DBG("TUNGETVNETHDRSZ %d\n", s);
-		return 0;
-
-	case TUNSETVNETHDRSZ:
-		if (get_user(s, sp))
-			return -EFAULT;
-		if (s < (int)sizeof(struct virtio_net_hdr))
-			return -EINVAL;
-
-		KNI_DBG("TUNSETVNETHDRSZ %d\n", s);
-		q->vnet_hdr_sz = s;
-		return 0;
-
-	case TUNSETOFFLOAD:
-		KNI_DBG("TUNSETOFFLOAD %lx\n", arg);
-#ifdef RTE_KNI_VHOST_VNET_HDR_EN
-		/* not support any offload yet */
-		if (!(q->flags & IFF_VNET_HDR))
-			return  -EINVAL;
-
-		return 0;
-#else
-		return -EINVAL;
-#endif
-
-	default:
-		KNI_DBG("NOT SUPPORT\n");
-		return -EINVAL;
-	}
-}
-
-static int
-kni_sock_compat_ioctl(struct socket *sock, unsigned int cmd,
-		     unsigned long arg)
-{
-	/* 32 bits app on 64 bits OS to be supported later */
-	KNI_PRINT("Not implemented.\n");
-
-	return -EINVAL;
-}
-
-#define KNI_VHOST_WAIT_WQ_SAFE()                        \
-do {		                                	\
-	while ((BE_FINISH | BE_STOP) == kni->vq_status) \
-		msleep(1);                              \
-}while(0)                                               \
-
-
-static int
-kni_sock_release(struct socket *sock)
-{
-	struct kni_vhost_queue *q =
-		container_of(sock->sk, struct kni_vhost_queue, sk);
-	struct kni_dev *kni;
-
-	if (q == NULL)
-		return 0;
-
-	if (NULL != (kni = q->kni)) {
-		kni->vq_status = BE_STOP;
-		KNI_VHOST_WAIT_WQ_SAFE();
-		kni->vhost_queue = NULL;
-		q->kni = NULL;
-	}
-
-	if (q->sockfd != -1)
-		q->sockfd = -1;
-
-	sk_set_socket(&q->sk, NULL);
-	sock->sk = NULL;
-
-	sock_put(&q->sk);
-
-	KNI_DBG("dummy sock release done\n");
-
-	return 0;
-}
-
-int
-kni_sock_getname (struct socket *sock,
-		  struct sockaddr *addr,
-		  int *sockaddr_len, int peer)
-{
-	KNI_DBG("dummy sock getname\n");
-	((struct sockaddr_ll*)addr)->sll_family = AF_PACKET;
-	return 0;
-}
-
-static const struct proto_ops kni_socket_ops = {
-	.getname = kni_sock_getname,
-	.sendmsg = kni_sock_sndmsg,
-	.recvmsg = kni_sock_rcvmsg,
-	.release = kni_sock_release,
-	.poll    = kni_sock_poll,
-	.ioctl   = kni_sock_ioctl,
-	.compat_ioctl = kni_sock_compat_ioctl,
-};
-
-static void
-kni_sk_write_space(struct sock *sk)
-{
-	wait_queue_head_t *wqueue;
-
-	if (!sock_writeable(sk) ||
-	    !test_and_clear_bit(SOCK_ASYNC_NOSPACE,
-				&sk->sk_socket->flags))
-		return;
-	wqueue = sk_sleep(sk);
-	if (wqueue && waitqueue_active(wqueue))
-		wake_up_interruptible_poll(
-			wqueue, POLLOUT | POLLWRNORM | POLLWRBAND);
-}
-
-static void
-kni_sk_destruct(struct sock *sk)
-{
-	struct kni_vhost_queue *q =
-		container_of(sk, struct kni_vhost_queue, sk);
-
-	if (!q)
-		return;
-
-	/* make sure there's no packet in buffer */
-	while (skb_dequeue(&sk->sk_receive_queue) != NULL)
-	       ;
-
-	mb();
-
-	if (q->fifo != NULL) {
-		kfree(q->fifo);
-		q->fifo = NULL;
-	}
-
-	if (q->cache != NULL) {
-		kfree(q->cache);
-		q->cache = NULL;
-	}
-}
-
-static int
-kni_vhost_backend_init(struct kni_dev *kni)
-{
-	struct kni_vhost_queue *q;
-	struct net *net = current->nsproxy->net_ns;
-	int err, i, sockfd;
-	struct rte_kni_fifo *fifo;
-	struct sk_buff *elem;
-
-	if (kni->vhost_queue != NULL)
-		return -1;
-
-	if (!(q = (struct kni_vhost_queue *)sk_alloc(
-		      net, AF_UNSPEC, GFP_KERNEL, &kni_raw_proto)))
-		return -ENOMEM;
-
-	err = sock_create_lite(AF_UNSPEC, SOCK_RAW, IPPROTO_RAW, &q->sock);
-	if (err)
-		goto free_sk;
-
-	sockfd = kni_sock_map_fd(q->sock);
-	if (sockfd < 0) {
-		err = sockfd;
-		goto free_sock;
-	}
-
-	/* cache init */
-	q->cache = (struct sk_buff*)
-		kzalloc(RTE_KNI_VHOST_MAX_CACHE_SIZE * sizeof(struct sk_buff),
-			GFP_KERNEL);
-	if (!q->cache)
-		goto free_fd;
-
-	fifo = (struct rte_kni_fifo*)
-		kzalloc(RTE_KNI_VHOST_MAX_CACHE_SIZE * sizeof(void *)
-			+ sizeof(struct rte_kni_fifo), GFP_KERNEL);
-	if (!fifo)
-		goto free_cache;
-
-	kni_fifo_init(fifo, RTE_KNI_VHOST_MAX_CACHE_SIZE);
-
-	for (i = 0; i < RTE_KNI_VHOST_MAX_CACHE_SIZE; i++) {
-		elem = &q->cache[i];
-		kni_fifo_put(fifo, (void**)&elem, 1);
-	}
-	q->fifo = fifo;
-
-	/* store sockfd in vhost_queue */
-	q->sockfd = sockfd;
-
-	/* init socket */
-	q->sock->type = SOCK_RAW;
-	q->sock->state = SS_CONNECTED;
-	q->sock->ops = &kni_socket_ops;
-	sock_init_data(q->sock, &q->sk);
-
-	/* init sock data */
-	q->sk.sk_write_space = kni_sk_write_space;
-	q->sk.sk_destruct = kni_sk_destruct;
-	q->flags = IFF_NO_PI | IFF_TAP;
-	q->vnet_hdr_sz = sizeof(struct virtio_net_hdr);
-#ifdef RTE_KNI_VHOST_VNET_HDR_EN
-	q->flags |= IFF_VNET_HDR;
-#endif
-
-	/* bind kni_dev with vhost_queue */
-	q->kni = kni;
-	kni->vhost_queue = q;
-
-	wmb();
-
-	kni->vq_status = BE_START;
-
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)
-	KNI_DBG("backend init sockfd=%d, sock->wq=0x%16llx,"
-		  "sk->sk_wq=0x%16llx",
-		  q->sockfd, (uint64_t)q->sock->wq,
-		  (uint64_t)q->sk.sk_wq);
-#else
-	KNI_DBG("backend init sockfd=%d, sock->wait at 0x%16llx,"
-		  "sk->sk_sleep=0x%16llx",
-		  q->sockfd, (uint64_t)&q->sock->wait,
-		  (uint64_t)q->sk.sk_sleep);
-#endif
-
-	return 0;
-
-free_cache:
-	kfree(q->cache);
-	q->cache = NULL;
-
-free_fd:
-	put_unused_fd(sockfd);
-
-free_sock:
-	q->kni = NULL;
-	kni->vhost_queue = NULL;
-	kni->vq_status |= BE_FINISH;
-	sock_release(q->sock);
-	q->sock->ops = NULL;
-	q->sock = NULL;
-
-free_sk:
-	sk_free((struct sock*)q);
-
-	return err;
-}
-
-/* kni vhost sock sysfs */
-static ssize_t
-show_sock_fd(struct device *dev, struct device_attribute *attr,
-	     char *buf)
-{
-	struct net_device *net_dev = container_of(dev, struct net_device, dev);
-	struct kni_dev *kni = netdev_priv(net_dev);
-	int sockfd = -1;
-	if (kni->vhost_queue != NULL)
-		sockfd = kni->vhost_queue->sockfd;
-	return snprintf(buf, 10, "%d\n", sockfd);
-}
-
-static ssize_t
-show_sock_en(struct device *dev, struct device_attribute *attr,
-	     char *buf)
-{
-	struct net_device *net_dev = container_of(dev, struct net_device, dev);
-	struct kni_dev *kni = netdev_priv(net_dev);
-	return snprintf(buf, 10, "%u\n", (kni->vhost_queue == NULL ? 0 : 1));
-}
-
-static ssize_t
-set_sock_en(struct device *dev, struct device_attribute *attr,
-	      const char *buf, size_t count)
-{
-	struct net_device *net_dev = container_of(dev, struct net_device, dev);
-	struct kni_dev *kni = netdev_priv(net_dev);
-	unsigned long en;
-	int err = 0;
-
-	if (0 != kstrtoul(buf, 0, &en))
-		return -EINVAL;
-
-	if (en)
-		err = kni_vhost_backend_init(kni);
-
-	return err ? err : count;
-}
-
-static DEVICE_ATTR(sock_fd, S_IRUGO | S_IRUSR, show_sock_fd, NULL);
-static DEVICE_ATTR(sock_en, S_IRUGO | S_IWUSR, show_sock_en, set_sock_en);
-static struct attribute *dev_attrs[] = {
-	&dev_attr_sock_fd.attr,
-	&dev_attr_sock_en.attr,
-        NULL,
-};
-
-static const struct attribute_group dev_attr_grp = {
-	.attrs = dev_attrs,
-};
-
-int
-kni_vhost_backend_release(struct kni_dev *kni)
-{
-	struct kni_vhost_queue *q = kni->vhost_queue;
-
-	if (q == NULL)
-		return 0;
-
-	/* dettach from kni */
-	q->kni = NULL;
-
-	KNI_DBG("release backend done\n");
-
-	return 0;
-}
-
-int
-kni_vhost_init(struct kni_dev *kni)
-{
-	struct net_device *dev = kni->net_dev;
-
-	if (sysfs_create_group(&dev->dev.kobj, &dev_attr_grp))
-		sysfs_remove_group(&dev->dev.kobj, &dev_attr_grp);
-
-	kni->vq_status = BE_STOP;
-
-	KNI_DBG("kni_vhost_init done\n");
-
-	return 0;
-}
-