This reverts commit 32e61b06b6946ba137723c5b1de2a1fdb2e0e0a5.
Keep virtio-vsock out-of-tree until the device specification is
finalized.
Signed-off-by: Stefan Hajnoczi <stefanha@xxxxxxxxxx>
---
net/vmw_vsock/virtio_transport.c | 466 ---------------------------------------
1 file changed, 466 deletions(-)
delete mode 100644 net/vmw_vsock/virtio_transport.c
diff --git a/net/vmw_vsock/virtio_transport.c b/net/vmw_vsock/virtio_transport.c
deleted file mode 100644
index df65dca..0000000
--- a/net/vmw_vsock/virtio_transport.c
+++ /dev/null
@@ -1,466 +0,0 @@
-/*
- * virtio transport for vsock
- *
- * Copyright (C) 2013-2015 Red Hat, Inc.
- * Author: Asias He <asias@xxxxxxxxxx>
- * Stefan Hajnoczi <stefanha@xxxxxxxxxx>
- *
- * Some of the code is take from Gerd Hoffmann <kraxel@xxxxxxxxxx>'s
- * early virtio-vsock proof-of-concept bits.
- *
- * This work is licensed under the terms of the GNU GPL, version 2.
- */
-#include <linux/spinlock.h>
-#include <linux/module.h>
-#include <linux/list.h>
-#include <linux/virtio.h>
-#include <linux/virtio_ids.h>
-#include <linux/virtio_config.h>
-#include <linux/virtio_vsock.h>
-#include <net/sock.h>
-#include <linux/mutex.h>
-#include <net/af_vsock.h>
-
-static struct workqueue_struct *virtio_vsock_workqueue;
-static struct virtio_vsock *the_virtio_vsock;
-static DEFINE_MUTEX(the_virtio_vsock_mutex); /* protects the_virtio_vsock */
-static void virtio_vsock_rx_fill(struct virtio_vsock *vsock);
-
-struct virtio_vsock {
- /* Virtio device */
- struct virtio_device *vdev;
- /* Virtio virtqueue */
- struct virtqueue *vqs[VSOCK_VQ_MAX];
- /* Wait queue for send pkt */
- wait_queue_head_t queue_wait;
- /* Work item to send pkt */
- struct work_struct tx_work;
- /* Work item to recv pkt */
- struct work_struct rx_work;
- /* Mutex to protect send pkt*/
- struct mutex tx_lock;
- /* Mutex to protect recv pkt*/
- struct mutex rx_lock;
- /* Number of recv buffers */
- int rx_buf_nr;
- /* Number of max recv buffers */
- int rx_buf_max_nr;
- /* Used for global tx buf limitation */
- u32 total_tx_buf;
- /* Guest context id, just like guest ip address */
- u32 guest_cid;
-};
-
-static struct virtio_vsock *virtio_vsock_get(void)
-{
- return the_virtio_vsock;
-}
-
-static u32 virtio_transport_get_local_cid(void)
-{
- struct virtio_vsock *vsock = virtio_vsock_get();
-
- return vsock->guest_cid;
-}
-
-static int
-virtio_transport_send_pkt(struct vsock_sock *vsk,
- struct virtio_vsock_pkt_info *info)
-{
- u32 src_cid, src_port, dst_cid, dst_port;
- int ret, in_sg = 0, out_sg = 0;
- struct virtio_transport *trans;
- struct virtio_vsock_pkt *pkt;
- struct virtio_vsock *vsock;
- struct scatterlist hdr, buf, *sgs[2];
- struct virtqueue *vq;
- u32 pkt_len = info->pkt_len;
- DEFINE_WAIT(wait);
-
- vsock = virtio_vsock_get();
- if (!vsock)
- return -ENODEV;
-
- src_cid = virtio_transport_get_local_cid();
- src_port = vsk->local_addr.svm_port;
- if (!info->remote_cid) {
- dst_cid = vsk->remote_addr.svm_cid;
- dst_port = vsk->remote_addr.svm_port;
- } else {
- dst_cid = info->remote_cid;
- dst_port = info->remote_port;
- }
-
- trans = vsk->trans;
- vq = vsock->vqs[VSOCK_VQ_TX];
-
- if (pkt_len > VIRTIO_VSOCK_DEFAULT_RX_BUF_SIZE)
- pkt_len = VIRTIO_VSOCK_DEFAULT_RX_BUF_SIZE;
- pkt_len = virtio_transport_get_credit(trans, pkt_len);
- /* Do not send zero length OP_RW pkt*/
- if (pkt_len == 0 && info->op == VIRTIO_VSOCK_OP_RW)
- return pkt_len;
-
- /* Respect global tx buf limitation */
- mutex_lock(&vsock->tx_lock);
- while (pkt_len + vsock->total_tx_buf > VIRTIO_VSOCK_MAX_TX_BUF_SIZE) {
- prepare_to_wait_exclusive(&vsock->queue_wait, &wait,
- TASK_UNINTERRUPTIBLE);
- mutex_unlock(&vsock->tx_lock);
- schedule();
- mutex_lock(&vsock->tx_lock);
- finish_wait(&vsock->queue_wait, &wait);
- }
- vsock->total_tx_buf += pkt_len;
- mutex_unlock(&vsock->tx_lock);
-
- pkt = virtio_transport_alloc_pkt(vsk, info, pkt_len,
- src_cid, src_port,
- dst_cid, dst_port);
- if (!pkt) {
- mutex_lock(&vsock->tx_lock);
- vsock->total_tx_buf -= pkt_len;
- mutex_unlock(&vsock->tx_lock);
- virtio_transport_put_credit(trans, pkt_len);
- return -ENOMEM;
- }
-
- pr_debug("%s:info->pkt_len= %d\n", __func__, info->pkt_len);
-
- /* Will be released in virtio_transport_send_pkt_work */
- sock_hold(&trans->vsk->sk);
- virtio_transport_inc_tx_pkt(pkt);
-
- /* Put pkt in the virtqueue */
- sg_init_one(&hdr, &pkt->hdr, sizeof(pkt->hdr));
- sgs[out_sg++] = &hdr;
- if (info->msg && info->pkt_len > 0) {
- sg_init_one(&buf, pkt->buf, pkt->len);
- sgs[out_sg++] = &buf;
- }
-
- mutex_lock(&vsock->tx_lock);
- while ((ret = virtqueue_add_sgs(vq, sgs, out_sg, in_sg, pkt,
- GFP_KERNEL)) < 0) {
- prepare_to_wait_exclusive(&vsock->queue_wait, &wait,
- TASK_UNINTERRUPTIBLE);
- mutex_unlock(&vsock->tx_lock);
- schedule();
- mutex_lock(&vsock->tx_lock);
- finish_wait(&vsock->queue_wait, &wait);
- }
- virtqueue_kick(vq);
- mutex_unlock(&vsock->tx_lock);
-
- return pkt_len;
-}
-
-static struct virtio_transport_pkt_ops virtio_ops = {
- .send_pkt = virtio_transport_send_pkt,
-};
-
-static void virtio_vsock_rx_fill(struct virtio_vsock *vsock)
-{
- int buf_len = VIRTIO_VSOCK_DEFAULT_RX_BUF_SIZE;
- struct virtio_vsock_pkt *pkt;
- struct scatterlist hdr, buf, *sgs[2];
- struct virtqueue *vq;
- int ret;
-
- vq = vsock->vqs[VSOCK_VQ_RX];
-
- do {
- pkt = kzalloc(sizeof(*pkt), GFP_KERNEL);
- if (!pkt) {
- pr_debug("%s: fail to allocate pkt\n", __func__);
- goto out;
- }
-
- /* TODO: use mergeable rx buffer */
- pkt->buf = kmalloc(buf_len, GFP_KERNEL);
- if (!pkt->buf) {
- pr_debug("%s: fail to allocate pkt->buf\n", __func__);
- goto err;
- }
-
- sg_init_one(&hdr, &pkt->hdr, sizeof(pkt->hdr));
- sgs[0] = &hdr;
-
- sg_init_one(&buf, pkt->buf, buf_len);
- sgs[1] = &buf;
- ret = virtqueue_add_sgs(vq, sgs, 0, 2, pkt, GFP_KERNEL);
- if (ret)
- goto err;
- vsock->rx_buf_nr++;
- } while (vq->num_free);
- if (vsock->rx_buf_nr > vsock->rx_buf_max_nr)
- vsock->rx_buf_max_nr = vsock->rx_buf_nr;
-out:
- virtqueue_kick(vq);
- return;
-err:
- virtqueue_kick(vq);
- virtio_transport_free_pkt(pkt);
- return;
-}
-
-static void virtio_transport_send_pkt_work(struct work_struct *work)
-{
- struct virtio_vsock *vsock =
- container_of(work, struct virtio_vsock, tx_work);
- struct virtio_vsock_pkt *pkt;
- bool added = false;
- struct virtqueue *vq;
- unsigned int len;
- struct sock *sk;
-
- vq = vsock->vqs[VSOCK_VQ_TX];
- mutex_lock(&vsock->tx_lock);
- do {
- virtqueue_disable_cb(vq);
- while ((pkt = virtqueue_get_buf(vq, &len)) != NULL) {
- sk = &pkt->trans->vsk->sk;
- virtio_transport_dec_tx_pkt(pkt);
- /* Release refcnt taken in virtio_transport_send_pkt */
- sock_put(sk);
- vsock->total_tx_buf -= pkt->len;
- virtio_transport_free_pkt(pkt);
- added = true;
- }
- } while (!virtqueue_enable_cb(vq));
- mutex_unlock(&vsock->tx_lock);
-
- if (added)
- wake_up(&vsock->queue_wait);
-}
-
-static void virtio_transport_recv_pkt_work(struct work_struct *work)
-{
- struct virtio_vsock *vsock =
- container_of(work, struct virtio_vsock, rx_work);
- struct virtio_vsock_pkt *pkt;
- struct virtqueue *vq;
- unsigned int len;
-
- vq = vsock->vqs[VSOCK_VQ_RX];
- mutex_lock(&vsock->rx_lock);
- do {
- virtqueue_disable_cb(vq);
- while ((pkt = virtqueue_get_buf(vq, &len)) != NULL) {
- pkt->len = len;
- virtio_transport_recv_pkt(pkt);
- vsock->rx_buf_nr--;
- }
- } while (!virtqueue_enable_cb(vq));
-
- if (vsock->rx_buf_nr < vsock->rx_buf_max_nr / 2)
- virtio_vsock_rx_fill(vsock);
- mutex_unlock(&vsock->rx_lock);
-}
-
-static void virtio_vsock_ctrl_done(struct virtqueue *vq)
-{
-}
-
-static void virtio_vsock_tx_done(struct virtqueue *vq)
-{
- struct virtio_vsock *vsock = vq->vdev->priv;
-
- if (!vsock)
- return;
- queue_work(virtio_vsock_workqueue, &vsock->tx_work);
-}
-
-static void virtio_vsock_rx_done(struct virtqueue *vq)
-{
- struct virtio_vsock *vsock = vq->vdev->priv;
-
- if (!vsock)
- return;
- queue_work(virtio_vsock_workqueue, &vsock->rx_work);
-}
-
-static int
-virtio_transport_socket_init(struct vsock_sock *vsk, struct vsock_sock *psk)
-{
- struct virtio_transport *trans;
- int ret;
-
- ret = virtio_transport_do_socket_init(vsk, psk);
- if (ret)
- return ret;
-
- trans = vsk->trans;
- trans->ops = &virtio_ops;
- return ret;
-}
-
-static struct vsock_transport virtio_transport = {
- .get_local_cid = virtio_transport_get_local_cid,
-
- .init = virtio_transport_socket_init,
- .destruct = virtio_transport_destruct,
- .release = virtio_transport_release,
- .connect = virtio_transport_connect,
- .shutdown = virtio_transport_shutdown,
-
- .dgram_bind = virtio_transport_dgram_bind,
- .dgram_dequeue = virtio_transport_dgram_dequeue,
- .dgram_enqueue = virtio_transport_dgram_enqueue,
- .dgram_allow = virtio_transport_dgram_allow,
-
- .stream_dequeue = virtio_transport_stream_dequeue,
- .stream_enqueue = virtio_transport_stream_enqueue,
- .stream_has_data = virtio_transport_stream_has_data,
- .stream_has_space = virtio_transport_stream_has_space,
- .stream_rcvhiwat = virtio_transport_stream_rcvhiwat,
- .stream_is_active = virtio_transport_stream_is_active,
- .stream_allow = virtio_transport_stream_allow,
-
- .notify_poll_in = virtio_transport_notify_poll_in,
- .notify_poll_out = virtio_transport_notify_poll_out,
- .notify_recv_init = virtio_transport_notify_recv_init,
- .notify_recv_pre_block = virtio_transport_notify_recv_pre_block,
- .notify_recv_pre_dequeue = virtio_transport_notify_recv_pre_dequeue,
- .notify_recv_post_dequeue = virtio_transport_notify_recv_post_dequeue,
- .notify_send_init = virtio_transport_notify_send_init,
- .notify_send_pre_block = virtio_transport_notify_send_pre_block,
- .notify_send_pre_enqueue = virtio_transport_notify_send_pre_enqueue,
- .notify_send_post_enqueue = virtio_transport_notify_send_post_enqueue,
-
- .set_buffer_size = virtio_transport_set_buffer_size,
- .set_min_buffer_size = virtio_transport_set_min_buffer_size,
- .set_max_buffer_size = virtio_transport_set_max_buffer_size,
- .get_buffer_size = virtio_transport_get_buffer_size,
- .get_min_buffer_size = virtio_transport_get_min_buffer_size,
- .get_max_buffer_size = virtio_transport_get_max_buffer_size,
-};
-
-static int virtio_vsock_probe(struct virtio_device *vdev)
-{
- vq_callback_t *callbacks[] = {
- virtio_vsock_ctrl_done,
- virtio_vsock_rx_done,
- virtio_vsock_tx_done,
- };
- const char *names[] = {
- "ctrl",
- "rx",
- "tx",
- };
- struct virtio_vsock *vsock = NULL;
- u32 guest_cid;
- int ret;
-
- ret = mutex_lock_interruptible(&the_virtio_vsock_mutex);
- if (ret)
- return ret;
-
- /* Only one virtio-vsock device per guest is supported */
- if (the_virtio_vsock) {
- ret = -EBUSY;
- goto out;
- }
-
- vsock = kzalloc(sizeof(*vsock), GFP_KERNEL);
- if (!vsock) {
- ret = -ENOMEM;
- goto out;
- }
-
- vsock->vdev = vdev;
-
- ret = vsock->vdev->config->find_vqs(vsock->vdev, VSOCK_VQ_MAX,
- vsock->vqs, callbacks, names);
- if (ret < 0)
- goto out;
-
- vdev->config->get(vdev, offsetof(struct virtio_vsock_config, guest_cid),
- &guest_cid, sizeof(guest_cid));
- vsock->guest_cid = le32_to_cpu(guest_cid);
- pr_debug("%s:guest_cid=%d\n", __func__, vsock->guest_cid);
-
- ret = vsock_core_init(&virtio_transport);
- if (ret < 0)
- goto out_vqs;
-
- vsock->rx_buf_nr = 0;
- vsock->rx_buf_max_nr = 0;
-
- vdev->priv = the_virtio_vsock = vsock;
- init_waitqueue_head(&vsock->queue_wait);
- mutex_init(&vsock->tx_lock);
- mutex_init(&vsock->rx_lock);
- INIT_WORK(&vsock->rx_work, virtio_transport_recv_pkt_work);
- INIT_WORK(&vsock->tx_work, virtio_transport_send_pkt_work);
-
- mutex_lock(&vsock->rx_lock);
- virtio_vsock_rx_fill(vsock);
- mutex_unlock(&vsock->rx_lock);
-
- mutex_unlock(&the_virtio_vsock_mutex);
- return 0;
-
-out_vqs:
- vsock->vdev->config->del_vqs(vsock->vdev);
-out:
- kfree(vsock);
- mutex_unlock(&the_virtio_vsock_mutex);
- return ret;
-}
-
-static void virtio_vsock_remove(struct virtio_device *vdev)
-{
- struct virtio_vsock *vsock = vdev->priv;
-
- mutex_lock(&the_virtio_vsock_mutex);
- the_virtio_vsock = NULL;
- vsock_core_exit();
- mutex_unlock(&the_virtio_vsock_mutex);
-
- kfree(vsock);
-}
-
-static struct virtio_device_id id_table[] = {
- { VIRTIO_ID_VSOCK, VIRTIO_DEV_ANY_ID },
- { 0 },
-};
-
-static unsigned int features[] = {
-};
-
-static struct virtio_driver virtio_vsock_driver = {
- .feature_table = features,
- .feature_table_size = ARRAY_SIZE(features),
- .driver.name = KBUILD_MODNAME,
- .driver.owner = THIS_MODULE,
- .id_table = id_table,
- .probe = virtio_vsock_probe,
- .remove = virtio_vsock_remove,
-};
-
-static int __init virtio_vsock_init(void)
-{
- int ret;
-
- virtio_vsock_workqueue = alloc_workqueue("virtio_vsock", 0, 0);
- if (!virtio_vsock_workqueue)
- return -ENOMEM;
- ret = register_virtio_driver(&virtio_vsock_driver);
- if (ret)
- destroy_workqueue(virtio_vsock_workqueue);
- return ret;
-}
-
-static void __exit virtio_vsock_exit(void)
-{
- unregister_virtio_driver(&virtio_vsock_driver);
- destroy_workqueue(virtio_vsock_workqueue);
-}
-
-module_init(virtio_vsock_init);
-module_exit(virtio_vsock_exit);
-MODULE_LICENSE("GPL v2");
-MODULE_AUTHOR("Asias He");
-MODULE_DESCRIPTION("virtio transport for vsock");
-MODULE_DEVICE_TABLE(virtio, id_table);
--
2.5.0
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