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Message-Id: <1449575856-28507-6-git-send-email-stefanha@redhat.com>
Date: Tue, 8 Dec 2015 19:57:35 +0800
From: Stefan Hajnoczi <stefanha@...hat.com>
To: netdev@...r.kernel.org
Cc: Matt Benjamin <mbenjamin@...hat.com>,
"David S. Miller" <davem@...emloft.net>, kvm@...r.kernel.org,
Christoffer Dall <christoffer.dall@...aro.org>,
"Michael S. Tsirkin" <mst@...hat.com>,
virtualization@...ts.linux-foundation.org, matt.ma@...aro.org,
Stefan Hajnoczi <stefanha@...hat.com>
Subject: [PATCH 5/6] Revert "VSOCK: Introduce virtio-vsock-common.ko"
This reverts commit 80a19e338d458abb5a700df3fd00795c51361f06.
Keep virtio-vsock out-of-tree until the device specification is
finalized.
Signed-off-by: Stefan Hajnoczi <stefanha@...hat.com>
---
include/linux/virtio_vsock.h | 209 -----
include/uapi/linux/virtio_ids.h | 1 -
include/uapi/linux/virtio_vsock.h | 89 ---
net/vmw_vsock/virtio_transport_common.c | 1272 -------------------------------
4 files changed, 1571 deletions(-)
delete mode 100644 include/linux/virtio_vsock.h
delete mode 100644 include/uapi/linux/virtio_vsock.h
delete mode 100644 net/vmw_vsock/virtio_transport_common.c
diff --git a/include/linux/virtio_vsock.h b/include/linux/virtio_vsock.h
deleted file mode 100644
index a5f3ecc..0000000
--- a/include/linux/virtio_vsock.h
+++ /dev/null
@@ -1,209 +0,0 @@
-/*
- * This header, excluding the #ifdef __KERNEL__ part, is BSD licensed so
- * anyone can use the definitions to implement compatible drivers/servers:
- *
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of IBM nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * Copyright (C) Red Hat, Inc., 2013-2015
- * Copyright (C) Asias He <asias@...hat.com>, 2013
- * Copyright (C) Stefan Hajnoczi <stefanha@...hat.com>, 2015
- */
-
-#ifndef _LINUX_VIRTIO_VSOCK_H
-#define _LINUX_VIRTIO_VSOCK_H
-
-#include <uapi/linux/virtio_vsock.h>
-#include <linux/socket.h>
-#include <net/sock.h>
-
-#define VIRTIO_VSOCK_DEFAULT_MIN_BUF_SIZE 128
-#define VIRTIO_VSOCK_DEFAULT_BUF_SIZE (1024 * 256)
-#define VIRTIO_VSOCK_DEFAULT_MAX_BUF_SIZE (1024 * 256)
-#define VIRTIO_VSOCK_DEFAULT_RX_BUF_SIZE (1024 * 4)
-#define VIRTIO_VSOCK_MAX_BUF_SIZE 0xFFFFFFFFUL
-#define VIRTIO_VSOCK_MAX_PKT_BUF_SIZE (1024 * 64)
-#define VIRTIO_VSOCK_MAX_TX_BUF_SIZE (1024 * 1024 * 16)
-#define VIRTIO_VSOCK_MAX_DGRAM_SIZE (1024 * 64)
-
-struct vsock_transport_recv_notify_data;
-struct vsock_transport_send_notify_data;
-struct sockaddr_vm;
-struct vsock_sock;
-
-enum {
- VSOCK_VQ_CTRL = 0,
- VSOCK_VQ_RX = 1, /* for host to guest data */
- VSOCK_VQ_TX = 2, /* for guest to host data */
- VSOCK_VQ_MAX = 3,
-};
-
-/* virtio transport socket state */
-struct virtio_transport {
- struct virtio_transport_pkt_ops *ops;
- struct vsock_sock *vsk;
-
- u32 buf_size;
- u32 buf_size_min;
- u32 buf_size_max;
-
- struct mutex tx_lock;
- struct mutex rx_lock;
-
- struct list_head rx_queue;
- u32 rx_bytes;
-
- /* Protected by trans->tx_lock */
- u32 tx_cnt;
- u32 buf_alloc;
- u32 peer_fwd_cnt;
- u32 peer_buf_alloc;
- /* Protected by trans->rx_lock */
- u32 fwd_cnt;
-
- /* Protected by sk_lock */
- u16 dgram_id;
- struct list_head incomplete_dgrams; /* dgram fragments */
-};
-
-struct virtio_vsock_pkt {
- struct virtio_vsock_hdr hdr;
- struct virtio_transport *trans;
- struct work_struct work;
- struct list_head list;
- void *buf;
- u32 len;
- u32 off;
-};
-
-struct virtio_vsock_pkt_info {
- u32 remote_cid, remote_port;
- struct msghdr *msg;
- u32 pkt_len;
- u16 type;
- u16 op;
- u32 flags;
- u16 dgram_id;
- u16 dgram_len;
-};
-
-struct virtio_transport_pkt_ops {
- int (*send_pkt)(struct vsock_sock *vsk,
- struct virtio_vsock_pkt_info *info);
-};
-
-void virtio_vsock_dumppkt(const char *func,
- const struct virtio_vsock_pkt *pkt);
-
-struct sock *
-virtio_transport_get_pending(struct sock *listener,
- struct virtio_vsock_pkt *pkt);
-struct virtio_vsock_pkt *
-virtio_transport_alloc_pkt(struct vsock_sock *vsk,
- struct virtio_vsock_pkt_info *info,
- size_t len,
- u32 src_cid,
- u32 src_port,
- u32 dst_cid,
- u32 dst_port);
-ssize_t
-virtio_transport_stream_dequeue(struct vsock_sock *vsk,
- struct msghdr *msg,
- size_t len,
- int type);
-int
-virtio_transport_dgram_dequeue(struct vsock_sock *vsk,
- struct msghdr *msg,
- size_t len, int flags);
-
-s64 virtio_transport_stream_has_data(struct vsock_sock *vsk);
-s64 virtio_transport_stream_has_space(struct vsock_sock *vsk);
-
-int virtio_transport_do_socket_init(struct vsock_sock *vsk,
- struct vsock_sock *psk);
-u64 virtio_transport_get_buffer_size(struct vsock_sock *vsk);
-u64 virtio_transport_get_min_buffer_size(struct vsock_sock *vsk);
-u64 virtio_transport_get_max_buffer_size(struct vsock_sock *vsk);
-void virtio_transport_set_buffer_size(struct vsock_sock *vsk, u64 val);
-void virtio_transport_set_min_buffer_size(struct vsock_sock *vsk, u64 val);
-void virtio_transport_set_max_buffer_size(struct vsock_sock *vs, u64 val);
-int
-virtio_transport_notify_poll_in(struct vsock_sock *vsk,
- size_t target,
- bool *data_ready_now);
-int
-virtio_transport_notify_poll_out(struct vsock_sock *vsk,
- size_t target,
- bool *space_available_now);
-
-int virtio_transport_notify_recv_init(struct vsock_sock *vsk,
- size_t target, struct vsock_transport_recv_notify_data *data);
-int virtio_transport_notify_recv_pre_block(struct vsock_sock *vsk,
- size_t target, struct vsock_transport_recv_notify_data *data);
-int virtio_transport_notify_recv_pre_dequeue(struct vsock_sock *vsk,
- size_t target, struct vsock_transport_recv_notify_data *data);
-int virtio_transport_notify_recv_post_dequeue(struct vsock_sock *vsk,
- size_t target, ssize_t copied, bool data_read,
- struct vsock_transport_recv_notify_data *data);
-int virtio_transport_notify_send_init(struct vsock_sock *vsk,
- struct vsock_transport_send_notify_data *data);
-int virtio_transport_notify_send_pre_block(struct vsock_sock *vsk,
- struct vsock_transport_send_notify_data *data);
-int virtio_transport_notify_send_pre_enqueue(struct vsock_sock *vsk,
- struct vsock_transport_send_notify_data *data);
-int virtio_transport_notify_send_post_enqueue(struct vsock_sock *vsk,
- ssize_t written, struct vsock_transport_send_notify_data *data);
-
-u64 virtio_transport_stream_rcvhiwat(struct vsock_sock *vsk);
-bool virtio_transport_stream_is_active(struct vsock_sock *vsk);
-bool virtio_transport_stream_allow(u32 cid, u32 port);
-int virtio_transport_dgram_bind(struct vsock_sock *vsk,
- struct sockaddr_vm *addr);
-bool virtio_transport_dgram_allow(u32 cid, u32 port);
-
-int virtio_transport_connect(struct vsock_sock *vsk);
-
-int virtio_transport_shutdown(struct vsock_sock *vsk, int mode);
-
-void virtio_transport_release(struct vsock_sock *vsk);
-
-ssize_t
-virtio_transport_stream_enqueue(struct vsock_sock *vsk,
- struct msghdr *msg,
- size_t len);
-int
-virtio_transport_dgram_enqueue(struct vsock_sock *vsk,
- struct sockaddr_vm *remote_addr,
- struct msghdr *msg,
- size_t len);
-
-void virtio_transport_destruct(struct vsock_sock *vsk);
-
-void virtio_transport_recv_pkt(struct virtio_vsock_pkt *pkt);
-void virtio_transport_free_pkt(struct virtio_vsock_pkt *pkt);
-void virtio_transport_inc_tx_pkt(struct virtio_vsock_pkt *pkt);
-void virtio_transport_dec_tx_pkt(struct virtio_vsock_pkt *pkt);
-u32 virtio_transport_get_credit(struct virtio_transport *trans, u32 wanted);
-void virtio_transport_put_credit(struct virtio_transport *trans, u32 credit);
-#endif /* _LINUX_VIRTIO_VSOCK_H */
diff --git a/include/uapi/linux/virtio_ids.h b/include/uapi/linux/virtio_ids.h
index 16dcf5d..77925f5 100644
--- a/include/uapi/linux/virtio_ids.h
+++ b/include/uapi/linux/virtio_ids.h
@@ -39,7 +39,6 @@
#define VIRTIO_ID_9P 9 /* 9p virtio console */
#define VIRTIO_ID_RPROC_SERIAL 11 /* virtio remoteproc serial link */
#define VIRTIO_ID_CAIF 12 /* Virtio caif */
-#define VIRTIO_ID_VSOCK 13 /* virtio vsock transport */
#define VIRTIO_ID_GPU 16 /* virtio GPU */
#define VIRTIO_ID_INPUT 18 /* virtio input */
diff --git a/include/uapi/linux/virtio_vsock.h b/include/uapi/linux/virtio_vsock.h
deleted file mode 100644
index 8cf9b56..0000000
--- a/include/uapi/linux/virtio_vsock.h
+++ /dev/null
@@ -1,89 +0,0 @@
-/*
- * This header, excluding the #ifdef __KERNEL__ part, is BSD licensed so
- * anyone can use the definitions to implement compatible drivers/servers:
- *
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of IBM nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * Copyright (C) Red Hat, Inc., 2013-2015
- * Copyright (C) Asias He <asias@...hat.com>, 2013
- * Copyright (C) Stefan Hajnoczi <stefanha@...hat.com>, 2015
- */
-
-#ifndef _UAPI_LINUX_VIRTIO_VSOCK_H
-#define _UAPI_LINUX_VIRTIO_VOSCK_H
-
-#include <linux/types.h>
-#include <linux/virtio_ids.h>
-#include <linux/virtio_config.h>
-
-struct virtio_vsock_config {
- __le32 guest_cid;
- __le32 max_virtqueue_pairs;
-};
-
-struct virtio_vsock_hdr {
- __le32 src_cid;
- __le32 src_port;
- __le32 dst_cid;
- __le32 dst_port;
- __le32 len;
- __le16 type; /* enum virtio_vsock_type */
- __le16 op; /* enum virtio_vsock_op */
- __le32 flags;
- __le32 buf_alloc;
- __le32 fwd_cnt;
-};
-
-enum virtio_vsock_type {
- VIRTIO_VSOCK_TYPE_STREAM = 1,
- VIRTIO_VSOCK_TYPE_DGRAM = 2,
-};
-
-enum virtio_vsock_op {
- VIRTIO_VSOCK_OP_INVALID = 0,
-
- /* Connect operations */
- VIRTIO_VSOCK_OP_REQUEST = 1,
- VIRTIO_VSOCK_OP_RESPONSE = 2,
- VIRTIO_VSOCK_OP_ACK = 3,
- VIRTIO_VSOCK_OP_RST = 4,
- VIRTIO_VSOCK_OP_SHUTDOWN = 5,
-
- /* To send payload */
- VIRTIO_VSOCK_OP_RW = 6,
-
- /* Tell the peer our credit info */
- VIRTIO_VSOCK_OP_CREDIT_UPDATE = 7,
- /* Request the peer to send the credit info to us */
- VIRTIO_VSOCK_OP_CREDIT_REQUEST = 8,
-};
-
-/* VIRTIO_VSOCK_OP_SHUTDOWN flags values */
-enum virtio_vsock_shutdown {
- VIRTIO_VSOCK_SHUTDOWN_RCV = 1,
- VIRTIO_VSOCK_SHUTDOWN_SEND = 2,
-};
-
-#endif /* _UAPI_LINUX_VIRTIO_VSOCK_H */
diff --git a/net/vmw_vsock/virtio_transport_common.c b/net/vmw_vsock/virtio_transport_common.c
deleted file mode 100644
index 28f790d..0000000
--- a/net/vmw_vsock/virtio_transport_common.c
+++ /dev/null
@@ -1,1272 +0,0 @@
-/*
- * common code for virtio vsock
- *
- * Copyright (C) 2013-2015 Red Hat, Inc.
- * Author: Asias He <asias@...hat.com>
- * Stefan Hajnoczi <stefanha@...hat.com>
- *
- * This work is licensed under the terms of the GNU GPL, version 2.
- */
-#include <linux/module.h>
-#include <linux/ctype.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 <linux/random.h>
-#include <linux/cryptohash.h>
-
-#include <net/sock.h>
-#include <net/af_vsock.h>
-
-#define COOKIEBITS 24
-#define COOKIEMASK (((u32)1 << COOKIEBITS) - 1)
-#define VSOCK_TIMEOUT_INIT 4
-
-#define SHA_MESSAGE_WORDS 16
-#define SHA_VSOCK_WORDS 5
-
-static u32 vsockcookie_secret[2][SHA_MESSAGE_WORDS - SHA_VSOCK_WORDS +
- SHA_DIGEST_WORDS];
-
-static DEFINE_PER_CPU(__u32[SHA_MESSAGE_WORDS + SHA_DIGEST_WORDS +
- SHA_WORKSPACE_WORDS], vsock_cookie_scratch);
-
-static u32 cookie_hash(u32 saddr, u32 daddr, u16 sport, u16 dport,
- u32 count, int c)
-{
- __u32 *tmp = this_cpu_ptr(vsock_cookie_scratch);
-
- memcpy(tmp + SHA_VSOCK_WORDS, vsockcookie_secret[c],
- sizeof(vsockcookie_secret[c]));
- tmp[0] = saddr;
- tmp[1] = daddr;
- tmp[2] = sport;
- tmp[3] = dport;
- tmp[4] = count;
- sha_transform(tmp + SHA_MESSAGE_WORDS, (__u8 *)tmp,
- tmp + SHA_MESSAGE_WORDS + SHA_DIGEST_WORDS);
-
- return tmp[17];
-}
-
-static u32
-virtio_vsock_secure_cookie(u32 saddr, u32 daddr, u32 sport, u32 dport,
- u32 count)
-{
- u32 h1, h2;
-
- h1 = cookie_hash(saddr, daddr, sport, dport, 0, 0);
- h2 = cookie_hash(saddr, daddr, sport, dport, count, 1);
-
- return h1 + (count << COOKIEBITS) + (h2 & COOKIEMASK);
-}
-
-static u32
-virtio_vsock_check_cookie(u32 saddr, u32 daddr, u32 sport, u32 dport,
- u32 count, u32 cookie, u32 maxdiff)
-{
- u32 diff;
- u32 ret;
-
- cookie -= cookie_hash(saddr, daddr, sport, dport, 0, 0);
-
- diff = (count - (cookie >> COOKIEBITS)) & ((u32)-1 >> COOKIEBITS);
- pr_debug("%s: diff=%x\n", __func__, diff);
- if (diff >= maxdiff)
- return (u32)-1;
-
- ret = (cookie -
- cookie_hash(saddr, daddr, sport, dport, count - diff, 1))
- & COOKIEMASK;
- pr_debug("%s: ret=%x\n", __func__, diff);
-
- return ret;
-}
-
-void virtio_vsock_dumppkt(const char *func, const struct virtio_vsock_pkt *pkt)
-{
- pr_debug("%s: pkt=%p, op=%d, len=%d, %d:%d---%d:%d, len=%d\n",
- func, pkt,
- le16_to_cpu(pkt->hdr.op),
- le32_to_cpu(pkt->hdr.len),
- le32_to_cpu(pkt->hdr.src_cid),
- le32_to_cpu(pkt->hdr.src_port),
- le32_to_cpu(pkt->hdr.dst_cid),
- le32_to_cpu(pkt->hdr.dst_port),
- pkt->len);
-}
-EXPORT_SYMBOL_GPL(virtio_vsock_dumppkt);
-
-struct virtio_vsock_pkt *
-virtio_transport_alloc_pkt(struct vsock_sock *vsk,
- struct virtio_vsock_pkt_info *info,
- size_t len,
- u32 src_cid,
- u32 src_port,
- u32 dst_cid,
- u32 dst_port)
-{
- struct virtio_transport *trans = vsk->trans;
- struct virtio_vsock_pkt *pkt;
- int err;
-
- BUG_ON(!trans);
-
- pkt = kzalloc(sizeof(*pkt), GFP_KERNEL);
- if (!pkt)
- return NULL;
-
- pkt->hdr.type = cpu_to_le16(info->type);
- pkt->hdr.op = cpu_to_le16(info->op);
- pkt->hdr.src_cid = cpu_to_le32(src_cid);
- pkt->hdr.src_port = cpu_to_le32(src_port);
- pkt->hdr.dst_cid = cpu_to_le32(dst_cid);
- pkt->hdr.dst_port = cpu_to_le32(dst_port);
- pkt->hdr.flags = cpu_to_le32(info->flags);
- pkt->len = len;
- pkt->trans = trans;
- if (info->type == VIRTIO_VSOCK_TYPE_DGRAM)
- pkt->hdr.len = cpu_to_le32(len + (info->dgram_len << 16));
- else if (info->type == VIRTIO_VSOCK_TYPE_STREAM)
- pkt->hdr.len = cpu_to_le32(len);
-
- if (info->msg && len > 0) {
- pkt->buf = kmalloc(len, GFP_KERNEL);
- if (!pkt->buf)
- goto out_pkt;
- err = memcpy_from_msg(pkt->buf, info->msg, len);
- if (err)
- goto out;
- }
-
- return pkt;
-
-out:
- kfree(pkt->buf);
-out_pkt:
- kfree(pkt);
- return NULL;
-}
-EXPORT_SYMBOL_GPL(virtio_transport_alloc_pkt);
-
-struct sock *
-virtio_transport_get_pending(struct sock *listener,
- struct virtio_vsock_pkt *pkt)
-{
- struct vsock_sock *vlistener;
- struct vsock_sock *vpending;
- struct sockaddr_vm src;
- struct sockaddr_vm dst;
- struct sock *pending;
-
- vsock_addr_init(&src, le32_to_cpu(pkt->hdr.src_cid), le32_to_cpu(pkt->hdr.src_port));
- vsock_addr_init(&dst, le32_to_cpu(pkt->hdr.dst_cid), le32_to_cpu(pkt->hdr.dst_port));
-
- vlistener = vsock_sk(listener);
- list_for_each_entry(vpending, &vlistener->pending_links,
- pending_links) {
- if (vsock_addr_equals_addr(&src, &vpending->remote_addr) &&
- vsock_addr_equals_addr(&dst, &vpending->local_addr)) {
- pending = sk_vsock(vpending);
- sock_hold(pending);
- return pending;
- }
- }
-
- return NULL;
-}
-EXPORT_SYMBOL_GPL(virtio_transport_get_pending);
-
-static void virtio_transport_inc_rx_pkt(struct virtio_vsock_pkt *pkt)
-{
- pkt->trans->rx_bytes += pkt->len;
-}
-
-static void virtio_transport_dec_rx_pkt(struct virtio_vsock_pkt *pkt)
-{
- pkt->trans->rx_bytes -= pkt->len;
- pkt->trans->fwd_cnt += pkt->len;
-}
-
-void virtio_transport_inc_tx_pkt(struct virtio_vsock_pkt *pkt)
-{
- mutex_lock(&pkt->trans->tx_lock);
- pkt->hdr.fwd_cnt = cpu_to_le32(pkt->trans->fwd_cnt);
- pkt->hdr.buf_alloc = cpu_to_le32(pkt->trans->buf_alloc);
- mutex_unlock(&pkt->trans->tx_lock);
-}
-EXPORT_SYMBOL_GPL(virtio_transport_inc_tx_pkt);
-
-void virtio_transport_dec_tx_pkt(struct virtio_vsock_pkt *pkt)
-{
-}
-EXPORT_SYMBOL_GPL(virtio_transport_dec_tx_pkt);
-
-u32 virtio_transport_get_credit(struct virtio_transport *trans, u32 credit)
-{
- u32 ret;
-
- mutex_lock(&trans->tx_lock);
- ret = trans->peer_buf_alloc - (trans->tx_cnt - trans->peer_fwd_cnt);
- if (ret > credit)
- ret = credit;
- trans->tx_cnt += ret;
- mutex_unlock(&trans->tx_lock);
-
- pr_debug("%s: ret=%d, buf_alloc=%d, peer_buf_alloc=%d,"
- "tx_cnt=%d, fwd_cnt=%d, peer_fwd_cnt=%d\n", __func__,
- ret, trans->buf_alloc, trans->peer_buf_alloc,
- trans->tx_cnt, trans->fwd_cnt, trans->peer_fwd_cnt);
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(virtio_transport_get_credit);
-
-void virtio_transport_put_credit(struct virtio_transport *trans, u32 credit)
-{
- mutex_lock(&trans->tx_lock);
- trans->tx_cnt -= credit;
- mutex_unlock(&trans->tx_lock);
-}
-EXPORT_SYMBOL_GPL(virtio_transport_put_credit);
-
-static int virtio_transport_send_credit_update(struct vsock_sock *vsk, int type, struct virtio_vsock_hdr *hdr)
-{
- struct virtio_transport *trans = vsk->trans;
- struct virtio_vsock_pkt_info info = {
- .op = VIRTIO_VSOCK_OP_CREDIT_UPDATE,
- .type = type,
- };
-
- if (hdr && type == VIRTIO_VSOCK_TYPE_DGRAM) {
- info.remote_cid = le32_to_cpu(hdr->src_cid);
- info.remote_port = le32_to_cpu(hdr->src_port);
- }
-
- pr_debug("%s: sk=%p send_credit_update\n", __func__, vsk);
- return trans->ops->send_pkt(vsk, &info);
-}
-
-static int virtio_transport_send_credit_request(struct vsock_sock *vsk, int type)
-{
- struct virtio_transport *trans = vsk->trans;
- struct virtio_vsock_pkt_info info = {
- .op = VIRTIO_VSOCK_OP_CREDIT_REQUEST,
- .type = type,
- };
-
- pr_debug("%s: sk=%p send_credit_request\n", __func__, vsk);
- return trans->ops->send_pkt(vsk, &info);
-}
-
-static ssize_t
-virtio_transport_stream_do_dequeue(struct vsock_sock *vsk,
- struct msghdr *msg,
- size_t len)
-{
- struct virtio_transport *trans = vsk->trans;
- struct virtio_vsock_pkt *pkt;
- size_t bytes, total = 0;
- int err = -EFAULT;
-
- mutex_lock(&trans->rx_lock);
- while (total < len && trans->rx_bytes > 0 &&
- !list_empty(&trans->rx_queue)) {
- pkt = list_first_entry(&trans->rx_queue,
- struct virtio_vsock_pkt, list);
-
- bytes = len - total;
- if (bytes > pkt->len - pkt->off)
- bytes = pkt->len - pkt->off;
-
- err = memcpy_to_msg(msg, pkt->buf + pkt->off, bytes);
- if (err)
- goto out;
- total += bytes;
- pkt->off += bytes;
- if (pkt->off == pkt->len) {
- virtio_transport_dec_rx_pkt(pkt);
- list_del(&pkt->list);
- virtio_transport_free_pkt(pkt);
- }
- }
- mutex_unlock(&trans->rx_lock);
-
- /* Send a credit pkt to peer */
- virtio_transport_send_credit_update(vsk, VIRTIO_VSOCK_TYPE_STREAM,
- NULL);
-
- return total;
-
-out:
- mutex_unlock(&trans->rx_lock);
- if (total)
- err = total;
- return err;
-}
-
-ssize_t
-virtio_transport_stream_dequeue(struct vsock_sock *vsk,
- struct msghdr *msg,
- size_t len, int flags)
-{
- if (flags & MSG_PEEK)
- return -EOPNOTSUPP;
-
- return virtio_transport_stream_do_dequeue(vsk, msg, len);
-}
-EXPORT_SYMBOL_GPL(virtio_transport_stream_dequeue);
-
-struct dgram_skb {
- struct list_head list;
- struct sk_buff *skb;
- u16 id;
-};
-
-static struct dgram_skb *dgram_id_to_skb(struct virtio_transport *trans,
- u16 id)
-{
- struct dgram_skb *dgram_skb;
-
- list_for_each_entry(dgram_skb, &trans->incomplete_dgrams, list) {
- if (dgram_skb->id == id)
- return dgram_skb;
- }
-
- return NULL;
-}
-
-static void
-virtio_transport_recv_dgram(struct sock *sk,
- struct virtio_vsock_pkt *pkt)
-{
- struct sk_buff *skb = NULL;
- struct vsock_sock *vsk;
- struct virtio_transport *trans;
- size_t size;
- u16 dgram_id, pkt_off, dgram_len, pkt_len;
- u32 flags, len;
- struct dgram_skb *dgram_skb;
-
- vsk = vsock_sk(sk);
- trans = vsk->trans;
-
- /* len: dgram_len | pkt_len */
- len = le32_to_cpu(pkt->hdr.len);
- dgram_len = len >> 16;
- pkt_len = len & 0xFFFF;
-
- /* flags: dgram_id | pkt_off */
- flags = le32_to_cpu(pkt->hdr.flags);
- dgram_id = flags >> 16;
- pkt_off = flags & 0xFFFF;
-
- pr_debug("%s: dgram_len=%d, pkt_len=%d, id=%d, off=%d\n", __func__,
- dgram_len, pkt_len, dgram_id, pkt_off);
-
- dgram_skb = dgram_id_to_skb(trans, dgram_id);
- if (dgram_skb) {
- /* This pkt is for a existing dgram */
- skb = dgram_skb->skb;
- pr_debug("%s:found skb\n", __func__);
- }
-
- /* Packet payload must be within datagram bounds */
- if (pkt_len > VIRTIO_VSOCK_DEFAULT_RX_BUF_SIZE)
- goto drop;
- if (pkt_len > dgram_len)
- goto drop;
- if (pkt_off > dgram_len)
- goto drop;
- if (dgram_len - pkt_off < pkt_len)
- goto drop;
-
- if (!skb) {
- /* This pkt is for a new dgram */
- pr_debug("%s:create skb\n", __func__);
-
- size = sizeof(pkt->hdr) + dgram_len;
- /* Attach the packet to the socket's receive queue as an sk_buff. */
- dgram_skb = kzalloc(sizeof(struct dgram_skb), GFP_ATOMIC);
- if (!dgram_skb)
- goto drop;
-
- skb = alloc_skb(size, GFP_ATOMIC);
- if (!skb) {
- kfree(dgram_skb);
- dgram_skb = NULL;
- goto drop;
- }
- dgram_skb->id = dgram_id;
- dgram_skb->skb = skb;
- list_add_tail(&dgram_skb->list, &trans->incomplete_dgrams);
-
- /* sk_receive_skb() will do a sock_put(), so hold here. */
- sock_hold(sk);
- skb_put(skb, size);
- memcpy(skb->data, &pkt->hdr, sizeof(pkt->hdr));
- }
-
- memcpy(skb->data + sizeof(pkt->hdr) + pkt_off, pkt->buf, pkt_len);
-
- pr_debug("%s:C, off=%d, pkt_len=%d, dgram_len=%d\n", __func__,
- pkt_off, pkt_len, dgram_len);
-
- /* We are done with this dgram */
- if (pkt_off + pkt_len == dgram_len) {
- pr_debug("%s:dgram_id=%d is done\n", __func__, dgram_id);
- list_del(&dgram_skb->list);
- kfree(dgram_skb);
- sk_receive_skb(sk, skb, 0);
- }
- virtio_transport_free_pkt(pkt);
- return;
-
-drop:
- if (dgram_skb) {
- list_del(&dgram_skb->list);
- kfree(dgram_skb);
- kfree_skb(skb);
- sock_put(sk);
- }
- virtio_transport_free_pkt(pkt);
-}
-
-int
-virtio_transport_dgram_dequeue(struct vsock_sock *vsk,
- struct msghdr *msg,
- size_t len, int flags)
-{
- struct virtio_vsock_hdr *hdr;
- struct sk_buff *skb;
- int noblock;
- int err;
- int dgram_len;
-
- noblock = flags & MSG_DONTWAIT;
-
- if (flags & MSG_OOB || flags & MSG_ERRQUEUE)
- return -EOPNOTSUPP;
-
- /* Retrieve the head sk_buff from the socket's receive queue. */
- err = 0;
- skb = skb_recv_datagram(&vsk->sk, flags, noblock, &err);
- if (err)
- return err;
- if (!skb)
- return -EAGAIN;
-
- hdr = (struct virtio_vsock_hdr *)skb->data;
- if (!hdr)
- goto out;
-
- dgram_len = le32_to_cpu(hdr->len) >> 16;
- /* Place the datagram payload in the user's iovec. */
- err = skb_copy_datagram_msg(skb, sizeof(*hdr), msg, dgram_len);
- if (err)
- goto out;
-
- if (msg->msg_name) {
- /* Provide the address of the sender. */
- DECLARE_SOCKADDR(struct sockaddr_vm *, vm_addr, msg->msg_name);
- vsock_addr_init(vm_addr, le32_to_cpu(hdr->src_cid), le32_to_cpu(hdr->src_port));
- msg->msg_namelen = sizeof(*vm_addr);
- }
- err = dgram_len;
-
- /* Send a credit pkt to peer */
- virtio_transport_send_credit_update(vsk, VIRTIO_VSOCK_TYPE_DGRAM, hdr);
-
- pr_debug("%s:done, recved =%d\n", __func__, dgram_len);
-out:
- skb_free_datagram(&vsk->sk, skb);
- return err;
-}
-EXPORT_SYMBOL_GPL(virtio_transport_dgram_dequeue);
-
-s64 virtio_transport_stream_has_data(struct vsock_sock *vsk)
-{
- struct virtio_transport *trans = vsk->trans;
- s64 bytes;
-
- mutex_lock(&trans->rx_lock);
- bytes = trans->rx_bytes;
- mutex_unlock(&trans->rx_lock);
-
- return bytes;
-}
-EXPORT_SYMBOL_GPL(virtio_transport_stream_has_data);
-
-static s64 virtio_transport_has_space(struct vsock_sock *vsk)
-{
- struct virtio_transport *trans = vsk->trans;
- s64 bytes;
-
- bytes = trans->peer_buf_alloc - (trans->tx_cnt - trans->peer_fwd_cnt);
- if (bytes < 0)
- bytes = 0;
-
- return bytes;
-}
-
-s64 virtio_transport_stream_has_space(struct vsock_sock *vsk)
-{
- struct virtio_transport *trans = vsk->trans;
- s64 bytes;
-
- mutex_lock(&trans->tx_lock);
- bytes = virtio_transport_has_space(vsk);
- mutex_unlock(&trans->tx_lock);
-
- pr_debug("%s: bytes=%lld\n", __func__, bytes);
-
- return bytes;
-}
-EXPORT_SYMBOL_GPL(virtio_transport_stream_has_space);
-
-int virtio_transport_do_socket_init(struct vsock_sock *vsk,
- struct vsock_sock *psk)
-{
- struct virtio_transport *trans;
-
- trans = kzalloc(sizeof(*trans), GFP_KERNEL);
- if (!trans)
- return -ENOMEM;
-
- vsk->trans = trans;
- trans->vsk = vsk;
- if (psk) {
- struct virtio_transport *ptrans = psk->trans;
- trans->buf_size = ptrans->buf_size;
- trans->buf_size_min = ptrans->buf_size_min;
- trans->buf_size_max = ptrans->buf_size_max;
- trans->peer_buf_alloc = ptrans->peer_buf_alloc;
- } else {
- trans->buf_size = VIRTIO_VSOCK_DEFAULT_BUF_SIZE;
- trans->buf_size_min = VIRTIO_VSOCK_DEFAULT_MIN_BUF_SIZE;
- trans->buf_size_max = VIRTIO_VSOCK_DEFAULT_MAX_BUF_SIZE;
- }
-
- trans->buf_alloc = trans->buf_size;
-
- pr_debug("%s: trans->buf_alloc=%d\n", __func__, trans->buf_alloc);
-
- mutex_init(&trans->rx_lock);
- mutex_init(&trans->tx_lock);
- INIT_LIST_HEAD(&trans->rx_queue);
- INIT_LIST_HEAD(&trans->incomplete_dgrams);
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(virtio_transport_do_socket_init);
-
-u64 virtio_transport_get_buffer_size(struct vsock_sock *vsk)
-{
- struct virtio_transport *trans = vsk->trans;
-
- return trans->buf_size;
-}
-EXPORT_SYMBOL_GPL(virtio_transport_get_buffer_size);
-
-u64 virtio_transport_get_min_buffer_size(struct vsock_sock *vsk)
-{
- struct virtio_transport *trans = vsk->trans;
-
- return trans->buf_size_min;
-}
-EXPORT_SYMBOL_GPL(virtio_transport_get_min_buffer_size);
-
-u64 virtio_transport_get_max_buffer_size(struct vsock_sock *vsk)
-{
- struct virtio_transport *trans = vsk->trans;
-
- return trans->buf_size_max;
-}
-EXPORT_SYMBOL_GPL(virtio_transport_get_max_buffer_size);
-
-void virtio_transport_set_buffer_size(struct vsock_sock *vsk, u64 val)
-{
- struct virtio_transport *trans = vsk->trans;
-
- if (val > VIRTIO_VSOCK_MAX_BUF_SIZE)
- val = VIRTIO_VSOCK_MAX_BUF_SIZE;
- if (val < trans->buf_size_min)
- trans->buf_size_min = val;
- if (val > trans->buf_size_max)
- trans->buf_size_max = val;
- trans->buf_size = val;
- trans->buf_alloc = val;
-}
-EXPORT_SYMBOL_GPL(virtio_transport_set_buffer_size);
-
-void virtio_transport_set_min_buffer_size(struct vsock_sock *vsk, u64 val)
-{
- struct virtio_transport *trans = vsk->trans;
-
- if (val > VIRTIO_VSOCK_MAX_BUF_SIZE)
- val = VIRTIO_VSOCK_MAX_BUF_SIZE;
- if (val > trans->buf_size)
- trans->buf_size = val;
- trans->buf_size_min = val;
-}
-EXPORT_SYMBOL_GPL(virtio_transport_set_min_buffer_size);
-
-void virtio_transport_set_max_buffer_size(struct vsock_sock *vsk, u64 val)
-{
- struct virtio_transport *trans = vsk->trans;
-
- if (val > VIRTIO_VSOCK_MAX_BUF_SIZE)
- val = VIRTIO_VSOCK_MAX_BUF_SIZE;
- if (val < trans->buf_size)
- trans->buf_size = val;
- trans->buf_size_max = val;
-}
-EXPORT_SYMBOL_GPL(virtio_transport_set_max_buffer_size);
-
-int
-virtio_transport_notify_poll_in(struct vsock_sock *vsk,
- size_t target,
- bool *data_ready_now)
-{
- if (vsock_stream_has_data(vsk))
- *data_ready_now = true;
- else
- *data_ready_now = false;
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(virtio_transport_notify_poll_in);
-
-int
-virtio_transport_notify_poll_out(struct vsock_sock *vsk,
- size_t target,
- bool *space_avail_now)
-{
- s64 free_space;
-
- free_space = vsock_stream_has_space(vsk);
- if (free_space > 0)
- *space_avail_now = true;
- else if (free_space == 0)
- *space_avail_now = false;
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(virtio_transport_notify_poll_out);
-
-int virtio_transport_notify_recv_init(struct vsock_sock *vsk,
- size_t target, struct vsock_transport_recv_notify_data *data)
-{
- return 0;
-}
-EXPORT_SYMBOL_GPL(virtio_transport_notify_recv_init);
-
-int virtio_transport_notify_recv_pre_block(struct vsock_sock *vsk,
- size_t target, struct vsock_transport_recv_notify_data *data)
-{
- return 0;
-}
-EXPORT_SYMBOL_GPL(virtio_transport_notify_recv_pre_block);
-
-int virtio_transport_notify_recv_pre_dequeue(struct vsock_sock *vsk,
- size_t target, struct vsock_transport_recv_notify_data *data)
-{
- return 0;
-}
-EXPORT_SYMBOL_GPL(virtio_transport_notify_recv_pre_dequeue);
-
-int virtio_transport_notify_recv_post_dequeue(struct vsock_sock *vsk,
- size_t target, ssize_t copied, bool data_read,
- struct vsock_transport_recv_notify_data *data)
-{
- return 0;
-}
-EXPORT_SYMBOL_GPL(virtio_transport_notify_recv_post_dequeue);
-
-int virtio_transport_notify_send_init(struct vsock_sock *vsk,
- struct vsock_transport_send_notify_data *data)
-{
- return 0;
-}
-EXPORT_SYMBOL_GPL(virtio_transport_notify_send_init);
-
-int virtio_transport_notify_send_pre_block(struct vsock_sock *vsk,
- struct vsock_transport_send_notify_data *data)
-{
- return 0;
-}
-EXPORT_SYMBOL_GPL(virtio_transport_notify_send_pre_block);
-
-int virtio_transport_notify_send_pre_enqueue(struct vsock_sock *vsk,
- struct vsock_transport_send_notify_data *data)
-{
- return 0;
-}
-EXPORT_SYMBOL_GPL(virtio_transport_notify_send_pre_enqueue);
-
-int virtio_transport_notify_send_post_enqueue(struct vsock_sock *vsk,
- ssize_t written, struct vsock_transport_send_notify_data *data)
-{
- return 0;
-}
-EXPORT_SYMBOL_GPL(virtio_transport_notify_send_post_enqueue);
-
-u64 virtio_transport_stream_rcvhiwat(struct vsock_sock *vsk)
-{
- struct virtio_transport *trans = vsk->trans;
-
- return trans->buf_size;
-}
-EXPORT_SYMBOL_GPL(virtio_transport_stream_rcvhiwat);
-
-bool virtio_transport_stream_is_active(struct vsock_sock *vsk)
-{
- return true;
-}
-EXPORT_SYMBOL_GPL(virtio_transport_stream_is_active);
-
-bool virtio_transport_stream_allow(u32 cid, u32 port)
-{
- return true;
-}
-EXPORT_SYMBOL_GPL(virtio_transport_stream_allow);
-
-int virtio_transport_dgram_bind(struct vsock_sock *vsk,
- struct sockaddr_vm *addr)
-{
- return vsock_bind_dgram_generic(vsk, addr);
-}
-EXPORT_SYMBOL_GPL(virtio_transport_dgram_bind);
-
-bool virtio_transport_dgram_allow(u32 cid, u32 port)
-{
- return true;
-}
-EXPORT_SYMBOL_GPL(virtio_transport_dgram_allow);
-
-int virtio_transport_connect(struct vsock_sock *vsk)
-{
- struct virtio_transport *trans = vsk->trans;
- struct virtio_vsock_pkt_info info = {
- .op = VIRTIO_VSOCK_OP_REQUEST,
- .type = VIRTIO_VSOCK_TYPE_STREAM,
- };
-
- pr_debug("%s: vsk=%p send_request\n", __func__, vsk);
- return trans->ops->send_pkt(vsk, &info);
-}
-EXPORT_SYMBOL_GPL(virtio_transport_connect);
-
-int virtio_transport_shutdown(struct vsock_sock *vsk, int mode)
-{
- struct virtio_transport *trans = vsk->trans;
- struct virtio_vsock_pkt_info info = {
- .op = VIRTIO_VSOCK_OP_SHUTDOWN,
- .type = VIRTIO_VSOCK_TYPE_STREAM,
- .flags = (mode & RCV_SHUTDOWN ?
- VIRTIO_VSOCK_SHUTDOWN_RCV : 0) |
- (mode & SEND_SHUTDOWN ?
- VIRTIO_VSOCK_SHUTDOWN_SEND : 0),
- };
-
- pr_debug("%s: vsk=%p: send_shutdown\n", __func__, vsk);
- return trans->ops->send_pkt(vsk, &info);
-}
-EXPORT_SYMBOL_GPL(virtio_transport_shutdown);
-
-void virtio_transport_release(struct vsock_sock *vsk)
-{
- struct virtio_transport *trans = vsk->trans;
- struct sock *sk = &vsk->sk;
- struct dgram_skb *dgram_skb;
- struct dgram_skb *dgram_skb_tmp;
-
- pr_debug("%s: vsk=%p\n", __func__, vsk);
-
- /* Tell other side to terminate connection */
- if (sk->sk_type == SOCK_STREAM && sk->sk_state == SS_CONNECTED) {
- virtio_transport_shutdown(vsk, SHUTDOWN_MASK);
- }
-
- /* Free incomplete dgrams */
- lock_sock(sk);
- list_for_each_entry_safe(dgram_skb, dgram_skb_tmp,
- &trans->incomplete_dgrams, list) {
- list_del(&dgram_skb->list);
- kfree_skb(dgram_skb->skb);
- kfree(dgram_skb);
- sock_put(sk); /* held in virtio_transport_recv_dgram() */
- }
- release_sock(sk);
-}
-EXPORT_SYMBOL_GPL(virtio_transport_release);
-
-int
-virtio_transport_dgram_enqueue(struct vsock_sock *vsk,
- struct sockaddr_vm *remote_addr,
- struct msghdr *msg,
- size_t dgram_len)
-{
- struct virtio_transport *trans = vsk->trans;
- struct virtio_vsock_pkt_info info = {
- .op = VIRTIO_VSOCK_OP_RW,
- .type = VIRTIO_VSOCK_TYPE_DGRAM,
- .msg = msg,
- };
- size_t total_written = 0, pkt_off = 0, written;
- u16 dgram_id;
-
- /* The max size of a single dgram we support is 64KB */
- if (dgram_len > VIRTIO_VSOCK_MAX_DGRAM_SIZE)
- return -EMSGSIZE;
-
- info.dgram_len = dgram_len;
- vsk->remote_addr = *remote_addr;
-
- dgram_id = trans->dgram_id++;
-
- /* TODO: To optimize, if we have enough credit to send the pkt already,
- * do not ask the peer to send credit to use */
- virtio_transport_send_credit_request(vsk, VIRTIO_VSOCK_TYPE_DGRAM);
-
- while (total_written < dgram_len) {
- info.pkt_len = dgram_len - total_written;
- info.flags = dgram_id << 16 | pkt_off;
- written = trans->ops->send_pkt(vsk, &info);
- if (written < 0)
- return -ENOMEM;
- if (written == 0) {
- /* TODO: if written = 0, we need a sleep & wakeup
- * instead of sleep */
- pr_debug("%s: SHOULD WAIT written==0", __func__);
- msleep(10);
- }
- total_written += written;
- pkt_off += written;
- pr_debug("%s:id=%d, dgram_len=%zu, off=%zu, total_written=%zu, written=%zu\n",
- __func__, dgram_id, dgram_len, pkt_off, total_written, written);
- }
-
- return dgram_len;
-}
-EXPORT_SYMBOL_GPL(virtio_transport_dgram_enqueue);
-
-ssize_t
-virtio_transport_stream_enqueue(struct vsock_sock *vsk,
- struct msghdr *msg,
- size_t len)
-{
- struct virtio_transport *trans = vsk->trans;
- struct virtio_vsock_pkt_info info = {
- .op = VIRTIO_VSOCK_OP_RW,
- .type = VIRTIO_VSOCK_TYPE_STREAM,
- .msg = msg,
- .pkt_len = len,
- };
-
- return trans->ops->send_pkt(vsk, &info);
-}
-EXPORT_SYMBOL_GPL(virtio_transport_stream_enqueue);
-
-void virtio_transport_destruct(struct vsock_sock *vsk)
-{
- struct virtio_transport *trans = vsk->trans;
-
- pr_debug("%s: vsk=%p\n", __func__, vsk);
- kfree(trans);
-}
-EXPORT_SYMBOL_GPL(virtio_transport_destruct);
-
-static int virtio_transport_send_ack(struct vsock_sock *vsk, u32 cookie)
-{
- struct virtio_transport *trans = vsk->trans;
- struct virtio_vsock_pkt_info info = {
- .op = VIRTIO_VSOCK_OP_ACK,
- .type = VIRTIO_VSOCK_TYPE_STREAM,
- .flags = cpu_to_le32(cookie),
- };
-
- pr_debug("%s: sk=%p send_offer\n", __func__, vsk);
- return trans->ops->send_pkt(vsk, &info);
-}
-
-static int virtio_transport_send_reset(struct vsock_sock *vsk,
- struct virtio_vsock_pkt *pkt)
-{
- struct virtio_transport *trans = vsk->trans;
- struct virtio_vsock_pkt_info info = {
- .op = VIRTIO_VSOCK_OP_RST,
- .type = VIRTIO_VSOCK_TYPE_STREAM,
- };
-
- pr_debug("%s\n", __func__);
-
- /* Send RST only if the original pkt is not a RST pkt */
- if (le16_to_cpu(pkt->hdr.op) == VIRTIO_VSOCK_OP_RST)
- return 0;
-
- return trans->ops->send_pkt(vsk, &info);
-}
-
-static int
-virtio_transport_recv_connecting(struct sock *sk,
- struct virtio_vsock_pkt *pkt)
-{
- struct vsock_sock *vsk = vsock_sk(sk);
- int err;
- int skerr;
- u32 cookie;
-
- pr_debug("%s: vsk=%p\n", __func__, vsk);
- switch (le16_to_cpu(pkt->hdr.op)) {
- case VIRTIO_VSOCK_OP_RESPONSE:
- cookie = le32_to_cpu(pkt->hdr.flags);
- pr_debug("%s: got RESPONSE and send ACK, cookie=%x\n", __func__, cookie);
- err = virtio_transport_send_ack(vsk, cookie);
- if (err < 0) {
- skerr = -err;
- goto destroy;
- }
- sk->sk_state = SS_CONNECTED;
- sk->sk_socket->state = SS_CONNECTED;
- vsock_insert_connected(vsk);
- sk->sk_state_change(sk);
- break;
- case VIRTIO_VSOCK_OP_INVALID:
- pr_debug("%s: got invalid\n", __func__);
- break;
- case VIRTIO_VSOCK_OP_RST:
- pr_debug("%s: got rst\n", __func__);
- skerr = ECONNRESET;
- err = 0;
- goto destroy;
- default:
- pr_debug("%s: got def\n", __func__);
- skerr = EPROTO;
- err = -EINVAL;
- goto destroy;
- }
- return 0;
-
-destroy:
- virtio_transport_send_reset(vsk, pkt);
- sk->sk_state = SS_UNCONNECTED;
- sk->sk_err = skerr;
- sk->sk_error_report(sk);
- return err;
-}
-
-static int
-virtio_transport_recv_connected(struct sock *sk,
- struct virtio_vsock_pkt *pkt)
-{
- struct vsock_sock *vsk = vsock_sk(sk);
- struct virtio_transport *trans = vsk->trans;
- int err = 0;
-
- switch (le16_to_cpu(pkt->hdr.op)) {
- case VIRTIO_VSOCK_OP_RW:
- pkt->len = le32_to_cpu(pkt->hdr.len);
- pkt->off = 0;
- pkt->trans = trans;
-
- mutex_lock(&trans->rx_lock);
- virtio_transport_inc_rx_pkt(pkt);
- list_add_tail(&pkt->list, &trans->rx_queue);
- mutex_unlock(&trans->rx_lock);
-
- sk->sk_data_ready(sk);
- return err;
- case VIRTIO_VSOCK_OP_CREDIT_UPDATE:
- sk->sk_write_space(sk);
- break;
- case VIRTIO_VSOCK_OP_SHUTDOWN:
- pr_debug("%s: got shutdown\n", __func__);
- if (le32_to_cpu(pkt->hdr.flags) & VIRTIO_VSOCK_SHUTDOWN_RCV)
- vsk->peer_shutdown |= RCV_SHUTDOWN;
- if (le32_to_cpu(pkt->hdr.flags) & VIRTIO_VSOCK_SHUTDOWN_SEND)
- vsk->peer_shutdown |= SEND_SHUTDOWN;
- if (le32_to_cpu(pkt->hdr.flags))
- sk->sk_state_change(sk);
- break;
- case VIRTIO_VSOCK_OP_RST:
- pr_debug("%s: got rst\n", __func__);
- sock_set_flag(sk, SOCK_DONE);
- vsk->peer_shutdown = SHUTDOWN_MASK;
- if (vsock_stream_has_data(vsk) <= 0)
- sk->sk_state = SS_DISCONNECTING;
- sk->sk_state_change(sk);
- break;
- default:
- err = -EINVAL;
- break;
- }
-
- virtio_transport_free_pkt(pkt);
- return err;
-}
-
-static int
-virtio_transport_send_response(struct vsock_sock *vsk,
- struct virtio_vsock_pkt *pkt)
-{
- struct virtio_transport *trans = vsk->trans;
- struct virtio_vsock_pkt_info info = {
- .op = VIRTIO_VSOCK_OP_RESPONSE,
- .type = VIRTIO_VSOCK_TYPE_STREAM,
- .remote_cid = le32_to_cpu(pkt->hdr.src_cid),
- .remote_port = le32_to_cpu(pkt->hdr.src_port),
- };
- u32 cookie;
-
- cookie = virtio_vsock_secure_cookie(le32_to_cpu(pkt->hdr.src_cid),
- le32_to_cpu(pkt->hdr.dst_cid),
- le32_to_cpu(pkt->hdr.src_port),
- le32_to_cpu(pkt->hdr.dst_port),
- jiffies / (HZ * 60));
- info.flags = cpu_to_le32(cookie);
-
- pr_debug("%s: send_response, cookie=%x\n", __func__, le32_to_cpu(cookie));
-
- return trans->ops->send_pkt(vsk, &info);
-}
-
-/* Handle server socket */
-static int
-virtio_transport_recv_listen(struct sock *sk, struct virtio_vsock_pkt *pkt)
-{
- struct vsock_sock *vsk = vsock_sk(sk);
- struct vsock_sock *vpending;
- struct sock *pending;
- int err;
- u32 cookie;
-
- switch (le16_to_cpu(pkt->hdr.op)) {
- case VIRTIO_VSOCK_OP_REQUEST:
- err = virtio_transport_send_response(vsk, pkt);
- if (err < 0) {
- // FIXME vsk should be vpending
- virtio_transport_send_reset(vsk, pkt);
- return err;
- }
- break;
- case VIRTIO_VSOCK_OP_ACK:
- cookie = le32_to_cpu(pkt->hdr.flags);
- err = virtio_vsock_check_cookie(le32_to_cpu(pkt->hdr.src_cid),
- le32_to_cpu(pkt->hdr.dst_cid),
- le32_to_cpu(pkt->hdr.src_port),
- le32_to_cpu(pkt->hdr.dst_port),
- jiffies / (HZ * 60),
- le32_to_cpu(pkt->hdr.flags),
- VSOCK_TIMEOUT_INIT);
- pr_debug("%s: cookie=%x, err=%d\n", __func__, cookie, err);
- if (err)
- return err;
-
- /* So no pending socket are responsible for this pkt, create one */
- pr_debug("%s: create pending\n", __func__);
- pending = __vsock_create(sock_net(sk), NULL, sk, GFP_KERNEL,
- sk->sk_type, 0);
- if (!pending) {
- virtio_transport_send_reset(vsk, pkt);
- return -ENOMEM;
- }
- sk->sk_ack_backlog++;
- pending->sk_state = SS_CONNECTING;
-
- vpending = vsock_sk(pending);
- vsock_addr_init(&vpending->local_addr, le32_to_cpu(pkt->hdr.dst_cid),
- le32_to_cpu(pkt->hdr.dst_port));
- vsock_addr_init(&vpending->remote_addr, le32_to_cpu(pkt->hdr.src_cid),
- le32_to_cpu(pkt->hdr.src_port));
- vsock_add_pending(sk, pending);
-
- pr_debug("%s: get pending\n", __func__);
- pending = virtio_transport_get_pending(sk, pkt);
- vpending = vsock_sk(pending);
- lock_sock(pending);
- switch (pending->sk_state) {
- case SS_CONNECTING:
- if (le16_to_cpu(pkt->hdr.op) != VIRTIO_VSOCK_OP_ACK) {
- pr_debug("%s: op=%d != OP_ACK\n", __func__,
- le16_to_cpu(pkt->hdr.op));
- virtio_transport_send_reset(vpending, pkt);
- pending->sk_err = EPROTO;
- pending->sk_state = SS_UNCONNECTED;
- sock_put(pending);
- } else {
- pending->sk_state = SS_CONNECTED;
- vsock_insert_connected(vpending);
-
- vsock_remove_pending(sk, pending);
- vsock_enqueue_accept(sk, pending);
-
- sk->sk_data_ready(sk);
- }
- err = 0;
- break;
- default:
- pr_debug("%s: sk->sk_ack_backlog=%d\n", __func__,
- sk->sk_ack_backlog);
- virtio_transport_send_reset(vpending, pkt);
- err = -EINVAL;
- break;
- }
- if (err < 0)
- vsock_remove_pending(sk, pending);
- release_sock(pending);
-
- /* Release refcnt obtained in virtio_transport_get_pending */
- sock_put(pending);
- break;
- default:
- break;
- }
-
- return 0;
-}
-
-static void virtio_transport_space_update(struct sock *sk,
- struct virtio_vsock_pkt *pkt)
-{
- struct vsock_sock *vsk = vsock_sk(sk);
- struct virtio_transport *trans = vsk->trans;
- bool space_available;
-
- /* buf_alloc and fwd_cnt is always included in the hdr */
- mutex_lock(&trans->tx_lock);
- trans->peer_buf_alloc = le32_to_cpu(pkt->hdr.buf_alloc);
- trans->peer_fwd_cnt = le32_to_cpu(pkt->hdr.fwd_cnt);
- space_available = virtio_transport_has_space(vsk);
- mutex_unlock(&trans->tx_lock);
-
- if (space_available)
- sk->sk_write_space(sk);
-}
-
-/* We are under the virtio-vsock's vsock->rx_lock or
- * vhost-vsock's vq->mutex lock */
-void virtio_transport_recv_pkt(struct virtio_vsock_pkt *pkt)
-{
- struct virtio_transport *trans;
- struct sockaddr_vm src, dst;
- struct vsock_sock *vsk;
- struct sock *sk;
-
- vsock_addr_init(&src, le32_to_cpu(pkt->hdr.src_cid), le32_to_cpu(pkt->hdr.src_port));
- vsock_addr_init(&dst, le32_to_cpu(pkt->hdr.dst_cid), le32_to_cpu(pkt->hdr.dst_port));
-
- virtio_vsock_dumppkt(__func__, pkt);
-
- if (le16_to_cpu(pkt->hdr.type) == VIRTIO_VSOCK_TYPE_DGRAM) {
- sk = vsock_find_unbound_socket(&dst);
- if (!sk)
- goto free_pkt;
-
- vsk = vsock_sk(sk);
- trans = vsk->trans;
- BUG_ON(!trans);
-
- virtio_transport_space_update(sk, pkt);
-
- lock_sock(sk);
- switch (le16_to_cpu(pkt->hdr.op)) {
- case VIRTIO_VSOCK_OP_CREDIT_UPDATE:
- virtio_transport_free_pkt(pkt);
- break;
- case VIRTIO_VSOCK_OP_CREDIT_REQUEST:
- virtio_transport_send_credit_update(vsk, VIRTIO_VSOCK_TYPE_DGRAM,
- &pkt->hdr);
- virtio_transport_free_pkt(pkt);
- break;
- case VIRTIO_VSOCK_OP_RW:
- virtio_transport_recv_dgram(sk, pkt);
- break;
- default:
- virtio_transport_free_pkt(pkt);
- break;
- }
- release_sock(sk);
-
- /* Release refcnt obtained when we fetched this socket out of
- * the unbound list.
- */
- sock_put(sk);
- return;
- } else if (le16_to_cpu(pkt->hdr.type) == VIRTIO_VSOCK_TYPE_STREAM) {
- /* The socket must be in connected or bound table
- * otherwise send reset back
- */
- sk = vsock_find_connected_socket(&src, &dst);
- if (!sk) {
- sk = vsock_find_bound_socket(&dst);
- if (!sk) {
- pr_debug("%s: can not find bound_socket\n", __func__);
- virtio_vsock_dumppkt(__func__, pkt);
- /* Ignore this pkt instead of sending reset back */
- /* TODO send a RST unless this packet is a RST (to avoid infinite loops) */
- goto free_pkt;
- }
- }
-
- vsk = vsock_sk(sk);
- trans = vsk->trans;
- BUG_ON(!trans);
-
- virtio_transport_space_update(sk, pkt);
-
- lock_sock(sk);
- switch (sk->sk_state) {
- case VSOCK_SS_LISTEN:
- virtio_transport_recv_listen(sk, pkt);
- virtio_transport_free_pkt(pkt);
- break;
- case SS_CONNECTING:
- virtio_transport_recv_connecting(sk, pkt);
- virtio_transport_free_pkt(pkt);
- break;
- case SS_CONNECTED:
- virtio_transport_recv_connected(sk, pkt);
- break;
- default:
- virtio_transport_free_pkt(pkt);
- break;
- }
- release_sock(sk);
-
- /* Release refcnt obtained when we fetched this socket out of the
- * bound or connected list.
- */
- sock_put(sk);
- }
- return;
-
-free_pkt:
- virtio_transport_free_pkt(pkt);
-}
-EXPORT_SYMBOL_GPL(virtio_transport_recv_pkt);
-
-void virtio_transport_free_pkt(struct virtio_vsock_pkt *pkt)
-{
- kfree(pkt->buf);
- kfree(pkt);
-}
-EXPORT_SYMBOL_GPL(virtio_transport_free_pkt);
-
-static int __init virtio_vsock_common_init(void)
-{
- get_random_bytes(vsockcookie_secret, sizeof(vsockcookie_secret));
- return 0;
-}
-
-static void __exit virtio_vsock_common_exit(void)
-{
-}
-
-module_init(virtio_vsock_common_init);
-module_exit(virtio_vsock_common_exit);
-MODULE_LICENSE("GPL v2");
-MODULE_AUTHOR("Asias He");
-MODULE_DESCRIPTION("common code for virtio vsock");
--
2.5.0
--
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