VSOCK: Introduce virtio_vsock_common.ko
This module contains the common code and header files for the following
virtio_transporto and vhost_vsock kernel modules.
Signed-off-by: Asias He <asias@redhat.com>
Signed-off-by: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
diff --git a/include/linux/virtio_vsock.h b/include/linux/virtio_vsock.h
new file mode 100644
index 0000000..9638bfe
--- /dev/null
+++ b/include/linux/virtio_vsock.h
@@ -0,0 +1,154 @@
+#ifndef _LINUX_VIRTIO_VSOCK_H
+#define _LINUX_VIRTIO_VSOCK_H
+
+#include <uapi/linux/virtio_vsock.h>
+#include <linux/socket.h>
+#include <net/sock.h>
+#include <net/af_vsock.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)
+
+enum {
+ VSOCK_VQ_RX = 0, /* for host to guest data */
+ VSOCK_VQ_TX = 1, /* for guest to host data */
+ VSOCK_VQ_EVENT = 2,
+ VSOCK_VQ_MAX = 3,
+};
+
+/* Per-socket state (accessed via vsk->trans) */
+struct virtio_vsock_sock {
+ struct vsock_sock *vsk;
+
+ /* Protected by lock_sock(sk_vsock(trans->vsk)) */
+ u32 buf_size;
+ u32 buf_size_min;
+ u32 buf_size_max;
+
+ spinlock_t tx_lock;
+ spinlock_t rx_lock;
+
+ /* Protected by tx_lock */
+ u32 tx_cnt;
+ u32 buf_alloc;
+ u32 peer_fwd_cnt;
+ u32 peer_buf_alloc;
+
+ /* Protected by rx_lock */
+ u32 fwd_cnt;
+ u32 rx_bytes;
+ struct list_head rx_queue;
+};
+
+struct virtio_vsock_pkt {
+ struct virtio_vsock_hdr hdr;
+ struct work_struct work;
+ struct list_head list;
+ void *buf;
+ u32 len;
+ u32 off;
+ bool reply;
+};
+
+struct virtio_vsock_pkt_info {
+ u32 remote_cid, remote_port;
+ struct msghdr *msg;
+ u32 pkt_len;
+ u16 type;
+ u16 op;
+ u32 flags;
+ bool reply;
+};
+
+struct virtio_transport {
+ /* This must be the first field */
+ struct vsock_transport transport;
+
+ /* Takes ownership of the packet */
+ int (*send_pkt)(struct virtio_vsock_pkt *pkt);
+};
+
+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_sock *vvs, struct virtio_vsock_pkt *pkt);
+u32 virtio_transport_get_credit(struct virtio_vsock_sock *vvs, u32 wanted);
+void virtio_transport_put_credit(struct virtio_vsock_sock *vvs, u32 credit);
+
+#endif /* _LINUX_VIRTIO_VSOCK_H */
diff --git a/include/net/af_vsock.h b/include/net/af_vsock.h
index 3af0b22..f275896 100644
--- a/include/net/af_vsock.h
+++ b/include/net/af_vsock.h
@@ -63,6 +63,8 @@
struct list_head accept_queue;
bool rejected;
struct delayed_work dwork;
+ struct delayed_work close_work;
+ bool close_work_scheduled;
u32 peer_shutdown;
bool sent_request;
bool ignore_connecting_rst;
diff --git a/include/trace/events/vsock_virtio_transport_common.h b/include/trace/events/vsock_virtio_transport_common.h
new file mode 100644
index 0000000..b7f1d62
--- /dev/null
+++ b/include/trace/events/vsock_virtio_transport_common.h
@@ -0,0 +1,144 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM vsock
+
+#if !defined(_TRACE_VSOCK_VIRTIO_TRANSPORT_COMMON_H) || \
+ defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_VSOCK_VIRTIO_TRANSPORT_COMMON_H
+
+#include <linux/tracepoint.h>
+
+TRACE_DEFINE_ENUM(VIRTIO_VSOCK_TYPE_STREAM);
+
+#define show_type(val) \
+ __print_symbolic(val, { VIRTIO_VSOCK_TYPE_STREAM, "STREAM" })
+
+TRACE_DEFINE_ENUM(VIRTIO_VSOCK_OP_INVALID);
+TRACE_DEFINE_ENUM(VIRTIO_VSOCK_OP_REQUEST);
+TRACE_DEFINE_ENUM(VIRTIO_VSOCK_OP_RESPONSE);
+TRACE_DEFINE_ENUM(VIRTIO_VSOCK_OP_RST);
+TRACE_DEFINE_ENUM(VIRTIO_VSOCK_OP_SHUTDOWN);
+TRACE_DEFINE_ENUM(VIRTIO_VSOCK_OP_RW);
+TRACE_DEFINE_ENUM(VIRTIO_VSOCK_OP_CREDIT_UPDATE);
+TRACE_DEFINE_ENUM(VIRTIO_VSOCK_OP_CREDIT_REQUEST);
+
+#define show_op(val) \
+ __print_symbolic(val, \
+ { VIRTIO_VSOCK_OP_INVALID, "INVALID" }, \
+ { VIRTIO_VSOCK_OP_REQUEST, "REQUEST" }, \
+ { VIRTIO_VSOCK_OP_RESPONSE, "RESPONSE" }, \
+ { VIRTIO_VSOCK_OP_RST, "RST" }, \
+ { VIRTIO_VSOCK_OP_SHUTDOWN, "SHUTDOWN" }, \
+ { VIRTIO_VSOCK_OP_RW, "RW" }, \
+ { VIRTIO_VSOCK_OP_CREDIT_UPDATE, "CREDIT_UPDATE" }, \
+ { VIRTIO_VSOCK_OP_CREDIT_REQUEST, "CREDIT_REQUEST" })
+
+TRACE_EVENT(virtio_transport_alloc_pkt,
+ TP_PROTO(
+ __u32 src_cid, __u32 src_port,
+ __u32 dst_cid, __u32 dst_port,
+ __u32 len,
+ __u16 type,
+ __u16 op,
+ __u32 flags
+ ),
+ TP_ARGS(
+ src_cid, src_port,
+ dst_cid, dst_port,
+ len,
+ type,
+ op,
+ flags
+ ),
+ TP_STRUCT__entry(
+ __field(__u32, src_cid)
+ __field(__u32, src_port)
+ __field(__u32, dst_cid)
+ __field(__u32, dst_port)
+ __field(__u32, len)
+ __field(__u16, type)
+ __field(__u16, op)
+ __field(__u32, flags)
+ ),
+ TP_fast_assign(
+ __entry->src_cid = src_cid;
+ __entry->src_port = src_port;
+ __entry->dst_cid = dst_cid;
+ __entry->dst_port = dst_port;
+ __entry->len = len;
+ __entry->type = type;
+ __entry->op = op;
+ __entry->flags = flags;
+ ),
+ TP_printk("%u:%u -> %u:%u len=%u type=%s op=%s flags=%#x",
+ __entry->src_cid, __entry->src_port,
+ __entry->dst_cid, __entry->dst_port,
+ __entry->len,
+ show_type(__entry->type),
+ show_op(__entry->op),
+ __entry->flags)
+);
+
+TRACE_EVENT(virtio_transport_recv_pkt,
+ TP_PROTO(
+ __u32 src_cid, __u32 src_port,
+ __u32 dst_cid, __u32 dst_port,
+ __u32 len,
+ __u16 type,
+ __u16 op,
+ __u32 flags,
+ __u32 buf_alloc,
+ __u32 fwd_cnt
+ ),
+ TP_ARGS(
+ src_cid, src_port,
+ dst_cid, dst_port,
+ len,
+ type,
+ op,
+ flags,
+ buf_alloc,
+ fwd_cnt
+ ),
+ TP_STRUCT__entry(
+ __field(__u32, src_cid)
+ __field(__u32, src_port)
+ __field(__u32, dst_cid)
+ __field(__u32, dst_port)
+ __field(__u32, len)
+ __field(__u16, type)
+ __field(__u16, op)
+ __field(__u32, flags)
+ __field(__u32, buf_alloc)
+ __field(__u32, fwd_cnt)
+ ),
+ TP_fast_assign(
+ __entry->src_cid = src_cid;
+ __entry->src_port = src_port;
+ __entry->dst_cid = dst_cid;
+ __entry->dst_port = dst_port;
+ __entry->len = len;
+ __entry->type = type;
+ __entry->op = op;
+ __entry->flags = flags;
+ __entry->buf_alloc = buf_alloc;
+ __entry->fwd_cnt = fwd_cnt;
+ ),
+ TP_printk("%u:%u -> %u:%u len=%u type=%s op=%s flags=%#x "
+ "buf_alloc=%u fwd_cnt=%u",
+ __entry->src_cid, __entry->src_port,
+ __entry->dst_cid, __entry->dst_port,
+ __entry->len,
+ show_type(__entry->type),
+ show_op(__entry->op),
+ __entry->flags,
+ __entry->buf_alloc,
+ __entry->fwd_cnt)
+);
+
+#endif /* _TRACE_VSOCK_VIRTIO_TRANSPORT_COMMON_H */
+
+#undef TRACE_INCLUDE_FILE
+#define TRACE_INCLUDE_FILE vsock_virtio_transport_common
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>
diff --git a/include/uapi/linux/Kbuild b/include/uapi/linux/Kbuild
index ec10cfe..3cf0116 100644
--- a/include/uapi/linux/Kbuild
+++ b/include/uapi/linux/Kbuild
@@ -453,6 +453,7 @@
header-y += virtio_rng.h
header-y += virtio_scsi.h
header-y += virtio_types.h
+header-y += virtio_vsock.h
header-y += vm_sockets.h
header-y += vt.h
header-y += wait.h
diff --git a/include/uapi/linux/virtio_ids.h b/include/uapi/linux/virtio_ids.h
index 77925f5..3228d58 100644
--- a/include/uapi/linux/virtio_ids.h
+++ b/include/uapi/linux/virtio_ids.h
@@ -41,5 +41,6 @@
#define VIRTIO_ID_CAIF 12 /* Virtio caif */
#define VIRTIO_ID_GPU 16 /* virtio GPU */
#define VIRTIO_ID_INPUT 18 /* virtio input */
+#define VIRTIO_ID_VSOCK 19 /* virtio vsock transport */
#endif /* _LINUX_VIRTIO_IDS_H */
diff --git a/include/uapi/linux/virtio_vsock.h b/include/uapi/linux/virtio_vsock.h
new file mode 100644
index 0000000..6b011c1
--- /dev/null
+++ b/include/uapi/linux/virtio_vsock.h
@@ -0,0 +1,94 @@
+/*
+ * 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@redhat.com>, 2013
+ * Copyright (C) Stefan Hajnoczi <stefanha@redhat.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 {
+ __le64 guest_cid;
+} __attribute__((packed));
+
+enum virtio_vsock_event_id {
+ VIRTIO_VSOCK_EVENT_TRANSPORT_RESET = 0,
+};
+
+struct virtio_vsock_event {
+ __le32 id;
+} __attribute__((packed));
+
+struct virtio_vsock_hdr {
+ __le64 src_cid;
+ __le64 dst_cid;
+ __le32 src_port;
+ __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;
+} __attribute__((packed));
+
+enum virtio_vsock_type {
+ VIRTIO_VSOCK_TYPE_STREAM = 1,
+};
+
+enum virtio_vsock_op {
+ VIRTIO_VSOCK_OP_INVALID = 0,
+
+ /* Connect operations */
+ VIRTIO_VSOCK_OP_REQUEST = 1,
+ VIRTIO_VSOCK_OP_RESPONSE = 2,
+ VIRTIO_VSOCK_OP_RST = 3,
+ VIRTIO_VSOCK_OP_SHUTDOWN = 4,
+
+ /* To send payload */
+ VIRTIO_VSOCK_OP_RW = 5,
+
+ /* Tell the peer our credit info */
+ VIRTIO_VSOCK_OP_CREDIT_UPDATE = 6,
+ /* Request the peer to send the credit info to us */
+ VIRTIO_VSOCK_OP_CREDIT_REQUEST = 7,
+};
+
+/* 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 */