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linux-next/net/vmw_vsock/vmci_transport.c

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// SPDX-License-Identifier: GPL-2.0-only
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
/*
* VMware vSockets Driver
*
* Copyright (C) 2007-2013 VMware, Inc. All rights reserved.
*/
#include <linux/types.h>
#include <linux/bitops.h>
#include <linux/cred.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/kmod.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/net.h>
#include <linux/poll.h>
#include <linux/skbuff.h>
#include <linux/smp.h>
#include <linux/socket.h>
#include <linux/stddef.h>
#include <linux/unistd.h>
#include <linux/wait.h>
#include <linux/workqueue.h>
#include <net/sock.h>
#include <net/af_vsock.h>
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
#include "vmci_transport_notify.h"
static int vmci_transport_recv_dgram_cb(void *data, struct vmci_datagram *dg);
static int vmci_transport_recv_stream_cb(void *data, struct vmci_datagram *dg);
static void vmci_transport_peer_detach_cb(u32 sub_id,
const struct vmci_event_data *ed,
void *client_data);
static void vmci_transport_recv_pkt_work(struct work_struct *work);
static void vmci_transport_cleanup(struct work_struct *work);
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
static int vmci_transport_recv_listen(struct sock *sk,
struct vmci_transport_packet *pkt);
static int vmci_transport_recv_connecting_server(
struct sock *sk,
struct sock *pending,
struct vmci_transport_packet *pkt);
static int vmci_transport_recv_connecting_client(
struct sock *sk,
struct vmci_transport_packet *pkt);
static int vmci_transport_recv_connecting_client_negotiate(
struct sock *sk,
struct vmci_transport_packet *pkt);
static int vmci_transport_recv_connecting_client_invalid(
struct sock *sk,
struct vmci_transport_packet *pkt);
static int vmci_transport_recv_connected(struct sock *sk,
struct vmci_transport_packet *pkt);
static bool vmci_transport_old_proto_override(bool *old_pkt_proto);
static u16 vmci_transport_new_proto_supported_versions(void);
static bool vmci_transport_proto_to_notify_struct(struct sock *sk, u16 *proto,
bool old_pkt_proto);
vsock: add multi-transports support This patch adds the support of multiple transports in the VSOCK core. With the multi-transports support, we can use vsock with nested VMs (using also different hypervisors) loading both guest->host and host->guest transports at the same time. Major changes: - vsock core module can be loaded regardless of the transports - vsock_core_init() and vsock_core_exit() are renamed to vsock_core_register() and vsock_core_unregister() - vsock_core_register() has a feature parameter (H2G, G2H, DGRAM) to identify which directions the transport can handle and if it's support DGRAM (only vmci) - each stream socket is assigned to a transport when the remote CID is set (during the connect() or when we receive a connection request on a listener socket). The remote CID is used to decide which transport to use: - remote CID <= VMADDR_CID_HOST will use guest->host transport; - remote CID == local_cid (guest->host transport) will use guest->host transport for loopback (host->guest transports don't support loopback); - remote CID > VMADDR_CID_HOST will use host->guest transport; - listener sockets are not bound to any transports since no transport operations are done on it. In this way we can create a listener socket, also if the transports are not loaded or with VMADDR_CID_ANY to listen on all transports. - DGRAM sockets are handled as before, since only the vmci_transport provides this feature. Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-11-14 17:57:46 +08:00
static bool vmci_check_transport(struct vsock_sock *vsk);
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
struct vmci_transport_recv_pkt_info {
struct work_struct work;
struct sock *sk;
struct vmci_transport_packet pkt;
};
static LIST_HEAD(vmci_transport_cleanup_list);
static DEFINE_SPINLOCK(vmci_transport_cleanup_lock);
static DECLARE_WORK(vmci_transport_cleanup_work, vmci_transport_cleanup);
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
static struct vmci_handle vmci_transport_stream_handle = { VMCI_INVALID_ID,
VMCI_INVALID_ID };
static u32 vmci_transport_qp_resumed_sub_id = VMCI_INVALID_ID;
static int PROTOCOL_OVERRIDE = -1;
/* Helper function to convert from a VMCI error code to a VSock error code. */
static s32 vmci_transport_error_to_vsock_error(s32 vmci_error)
{
switch (vmci_error) {
case VMCI_ERROR_NO_MEM:
return -ENOMEM;
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
case VMCI_ERROR_DUPLICATE_ENTRY:
case VMCI_ERROR_ALREADY_EXISTS:
return -EADDRINUSE;
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
case VMCI_ERROR_NO_ACCESS:
return -EPERM;
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
case VMCI_ERROR_NO_RESOURCES:
return -ENOBUFS;
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
case VMCI_ERROR_INVALID_RESOURCE:
return -EHOSTUNREACH;
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
case VMCI_ERROR_INVALID_ARGS:
default:
break;
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
}
return -EINVAL;
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
}
static u32 vmci_transport_peer_rid(u32 peer_cid)
{
if (VMADDR_CID_HYPERVISOR == peer_cid)
return VMCI_TRANSPORT_HYPERVISOR_PACKET_RID;
return VMCI_TRANSPORT_PACKET_RID;
}
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
static inline void
vmci_transport_packet_init(struct vmci_transport_packet *pkt,
struct sockaddr_vm *src,
struct sockaddr_vm *dst,
u8 type,
u64 size,
u64 mode,
struct vmci_transport_waiting_info *wait,
u16 proto,
struct vmci_handle handle)
{
/* We register the stream control handler as an any cid handle so we
* must always send from a source address of VMADDR_CID_ANY
*/
pkt->dg.src = vmci_make_handle(VMADDR_CID_ANY,
VMCI_TRANSPORT_PACKET_RID);
pkt->dg.dst = vmci_make_handle(dst->svm_cid,
vmci_transport_peer_rid(dst->svm_cid));
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
pkt->dg.payload_size = sizeof(*pkt) - sizeof(pkt->dg);
pkt->version = VMCI_TRANSPORT_PACKET_VERSION;
pkt->type = type;
pkt->src_port = src->svm_port;
pkt->dst_port = dst->svm_port;
memset(&pkt->proto, 0, sizeof(pkt->proto));
memset(&pkt->_reserved2, 0, sizeof(pkt->_reserved2));
switch (pkt->type) {
case VMCI_TRANSPORT_PACKET_TYPE_INVALID:
pkt->u.size = 0;
break;
case VMCI_TRANSPORT_PACKET_TYPE_REQUEST:
case VMCI_TRANSPORT_PACKET_TYPE_NEGOTIATE:
pkt->u.size = size;
break;
case VMCI_TRANSPORT_PACKET_TYPE_OFFER:
case VMCI_TRANSPORT_PACKET_TYPE_ATTACH:
pkt->u.handle = handle;
break;
case VMCI_TRANSPORT_PACKET_TYPE_WROTE:
case VMCI_TRANSPORT_PACKET_TYPE_READ:
case VMCI_TRANSPORT_PACKET_TYPE_RST:
pkt->u.size = 0;
break;
case VMCI_TRANSPORT_PACKET_TYPE_SHUTDOWN:
pkt->u.mode = mode;
break;
case VMCI_TRANSPORT_PACKET_TYPE_WAITING_READ:
case VMCI_TRANSPORT_PACKET_TYPE_WAITING_WRITE:
memcpy(&pkt->u.wait, wait, sizeof(pkt->u.wait));
break;
case VMCI_TRANSPORT_PACKET_TYPE_REQUEST2:
case VMCI_TRANSPORT_PACKET_TYPE_NEGOTIATE2:
pkt->u.size = size;
pkt->proto = proto;
break;
}
}
static inline void
vmci_transport_packet_get_addresses(struct vmci_transport_packet *pkt,
struct sockaddr_vm *local,
struct sockaddr_vm *remote)
{
vsock_addr_init(local, pkt->dg.dst.context, pkt->dst_port);
vsock_addr_init(remote, pkt->dg.src.context, pkt->src_port);
}
static int
__vmci_transport_send_control_pkt(struct vmci_transport_packet *pkt,
struct sockaddr_vm *src,
struct sockaddr_vm *dst,
enum vmci_transport_packet_type type,
u64 size,
u64 mode,
struct vmci_transport_waiting_info *wait,
u16 proto,
struct vmci_handle handle,
bool convert_error)
{
int err;
vmci_transport_packet_init(pkt, src, dst, type, size, mode, wait,
proto, handle);
err = vmci_datagram_send(&pkt->dg);
if (convert_error && (err < 0))
return vmci_transport_error_to_vsock_error(err);
return err;
}
static int
vmci_transport_reply_control_pkt_fast(struct vmci_transport_packet *pkt,
enum vmci_transport_packet_type type,
u64 size,
u64 mode,
struct vmci_transport_waiting_info *wait,
struct vmci_handle handle)
{
struct vmci_transport_packet reply;
struct sockaddr_vm src, dst;
if (pkt->type == VMCI_TRANSPORT_PACKET_TYPE_RST) {
return 0;
} else {
vmci_transport_packet_get_addresses(pkt, &src, &dst);
return __vmci_transport_send_control_pkt(&reply, &src, &dst,
type,
size, mode, wait,
VSOCK_PROTO_INVALID,
handle, true);
}
}
static int
vmci_transport_send_control_pkt_bh(struct sockaddr_vm *src,
struct sockaddr_vm *dst,
enum vmci_transport_packet_type type,
u64 size,
u64 mode,
struct vmci_transport_waiting_info *wait,
struct vmci_handle handle)
{
/* Note that it is safe to use a single packet across all CPUs since
* two tasklets of the same type are guaranteed to not ever run
* simultaneously. If that ever changes, or VMCI stops using tasklets,
* we can use per-cpu packets.
*/
static struct vmci_transport_packet pkt;
return __vmci_transport_send_control_pkt(&pkt, src, dst, type,
size, mode, wait,
VSOCK_PROTO_INVALID, handle,
false);
}
static int
vmci_transport_alloc_send_control_pkt(struct sockaddr_vm *src,
struct sockaddr_vm *dst,
enum vmci_transport_packet_type type,
u64 size,
u64 mode,
struct vmci_transport_waiting_info *wait,
u16 proto,
struct vmci_handle handle)
{
struct vmci_transport_packet *pkt;
int err;
pkt = kmalloc(sizeof(*pkt), GFP_KERNEL);
if (!pkt)
return -ENOMEM;
err = __vmci_transport_send_control_pkt(pkt, src, dst, type, size,
mode, wait, proto, handle,
true);
kfree(pkt);
return err;
}
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
static int
vmci_transport_send_control_pkt(struct sock *sk,
enum vmci_transport_packet_type type,
u64 size,
u64 mode,
struct vmci_transport_waiting_info *wait,
u16 proto,
struct vmci_handle handle)
{
struct vsock_sock *vsk;
vsk = vsock_sk(sk);
if (!vsock_addr_bound(&vsk->local_addr))
return -EINVAL;
if (!vsock_addr_bound(&vsk->remote_addr))
return -EINVAL;
return vmci_transport_alloc_send_control_pkt(&vsk->local_addr,
&vsk->remote_addr,
type, size, mode,
wait, proto, handle);
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
}
static int vmci_transport_send_reset_bh(struct sockaddr_vm *dst,
struct sockaddr_vm *src,
struct vmci_transport_packet *pkt)
{
if (pkt->type == VMCI_TRANSPORT_PACKET_TYPE_RST)
return 0;
return vmci_transport_send_control_pkt_bh(
dst, src,
VMCI_TRANSPORT_PACKET_TYPE_RST, 0,
0, NULL, VMCI_INVALID_HANDLE);
}
static int vmci_transport_send_reset(struct sock *sk,
struct vmci_transport_packet *pkt)
{
struct sockaddr_vm *dst_ptr;
struct sockaddr_vm dst;
struct vsock_sock *vsk;
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
if (pkt->type == VMCI_TRANSPORT_PACKET_TYPE_RST)
return 0;
vsk = vsock_sk(sk);
if (!vsock_addr_bound(&vsk->local_addr))
return -EINVAL;
if (vsock_addr_bound(&vsk->remote_addr)) {
dst_ptr = &vsk->remote_addr;
} else {
vsock_addr_init(&dst, pkt->dg.src.context,
pkt->src_port);
dst_ptr = &dst;
}
return vmci_transport_alloc_send_control_pkt(&vsk->local_addr, dst_ptr,
VMCI_TRANSPORT_PACKET_TYPE_RST,
0, 0, NULL, VSOCK_PROTO_INVALID,
VMCI_INVALID_HANDLE);
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
}
static int vmci_transport_send_negotiate(struct sock *sk, size_t size)
{
return vmci_transport_send_control_pkt(
sk,
VMCI_TRANSPORT_PACKET_TYPE_NEGOTIATE,
size, 0, NULL,
VSOCK_PROTO_INVALID,
VMCI_INVALID_HANDLE);
}
static int vmci_transport_send_negotiate2(struct sock *sk, size_t size,
u16 version)
{
return vmci_transport_send_control_pkt(
sk,
VMCI_TRANSPORT_PACKET_TYPE_NEGOTIATE2,
size, 0, NULL, version,
VMCI_INVALID_HANDLE);
}
static int vmci_transport_send_qp_offer(struct sock *sk,
struct vmci_handle handle)
{
return vmci_transport_send_control_pkt(
sk, VMCI_TRANSPORT_PACKET_TYPE_OFFER, 0,
0, NULL,
VSOCK_PROTO_INVALID, handle);
}
static int vmci_transport_send_attach(struct sock *sk,
struct vmci_handle handle)
{
return vmci_transport_send_control_pkt(
sk, VMCI_TRANSPORT_PACKET_TYPE_ATTACH,
0, 0, NULL, VSOCK_PROTO_INVALID,
handle);
}
static int vmci_transport_reply_reset(struct vmci_transport_packet *pkt)
{
return vmci_transport_reply_control_pkt_fast(
pkt,
VMCI_TRANSPORT_PACKET_TYPE_RST,
0, 0, NULL,
VMCI_INVALID_HANDLE);
}
static int vmci_transport_send_invalid_bh(struct sockaddr_vm *dst,
struct sockaddr_vm *src)
{
return vmci_transport_send_control_pkt_bh(
dst, src,
VMCI_TRANSPORT_PACKET_TYPE_INVALID,
0, 0, NULL, VMCI_INVALID_HANDLE);
}
int vmci_transport_send_wrote_bh(struct sockaddr_vm *dst,
struct sockaddr_vm *src)
{
return vmci_transport_send_control_pkt_bh(
dst, src,
VMCI_TRANSPORT_PACKET_TYPE_WROTE, 0,
0, NULL, VMCI_INVALID_HANDLE);
}
int vmci_transport_send_read_bh(struct sockaddr_vm *dst,
struct sockaddr_vm *src)
{
return vmci_transport_send_control_pkt_bh(
dst, src,
VMCI_TRANSPORT_PACKET_TYPE_READ, 0,
0, NULL, VMCI_INVALID_HANDLE);
}
int vmci_transport_send_wrote(struct sock *sk)
{
return vmci_transport_send_control_pkt(
sk, VMCI_TRANSPORT_PACKET_TYPE_WROTE, 0,
0, NULL, VSOCK_PROTO_INVALID,
VMCI_INVALID_HANDLE);
}
int vmci_transport_send_read(struct sock *sk)
{
return vmci_transport_send_control_pkt(
sk, VMCI_TRANSPORT_PACKET_TYPE_READ, 0,
0, NULL, VSOCK_PROTO_INVALID,
VMCI_INVALID_HANDLE);
}
int vmci_transport_send_waiting_write(struct sock *sk,
struct vmci_transport_waiting_info *wait)
{
return vmci_transport_send_control_pkt(
sk, VMCI_TRANSPORT_PACKET_TYPE_WAITING_WRITE,
0, 0, wait, VSOCK_PROTO_INVALID,
VMCI_INVALID_HANDLE);
}
int vmci_transport_send_waiting_read(struct sock *sk,
struct vmci_transport_waiting_info *wait)
{
return vmci_transport_send_control_pkt(
sk, VMCI_TRANSPORT_PACKET_TYPE_WAITING_READ,
0, 0, wait, VSOCK_PROTO_INVALID,
VMCI_INVALID_HANDLE);
}
static int vmci_transport_shutdown(struct vsock_sock *vsk, int mode)
{
return vmci_transport_send_control_pkt(
&vsk->sk,
VMCI_TRANSPORT_PACKET_TYPE_SHUTDOWN,
0, mode, NULL,
VSOCK_PROTO_INVALID,
VMCI_INVALID_HANDLE);
}
static int vmci_transport_send_conn_request(struct sock *sk, size_t size)
{
return vmci_transport_send_control_pkt(sk,
VMCI_TRANSPORT_PACKET_TYPE_REQUEST,
size, 0, NULL,
VSOCK_PROTO_INVALID,
VMCI_INVALID_HANDLE);
}
static int vmci_transport_send_conn_request2(struct sock *sk, size_t size,
u16 version)
{
return vmci_transport_send_control_pkt(
sk, VMCI_TRANSPORT_PACKET_TYPE_REQUEST2,
size, 0, NULL, version,
VMCI_INVALID_HANDLE);
}
static struct sock *vmci_transport_get_pending(
struct sock *listener,
struct vmci_transport_packet *pkt)
{
struct vsock_sock *vlistener;
struct vsock_sock *vpending;
struct sock *pending;
struct sockaddr_vm src;
vsock_addr_init(&src, pkt->dg.src.context, pkt->src_port);
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
vlistener = vsock_sk(listener);
list_for_each_entry(vpending, &vlistener->pending_links,
pending_links) {
if (vsock_addr_equals_addr(&src, &vpending->remote_addr) &&
pkt->dst_port == vpending->local_addr.svm_port) {
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
pending = sk_vsock(vpending);
sock_hold(pending);
goto found;
}
}
pending = NULL;
found:
return pending;
}
static void vmci_transport_release_pending(struct sock *pending)
{
sock_put(pending);
}
/* We allow two kinds of sockets to communicate with a restricted VM: 1)
* trusted sockets 2) sockets from applications running as the same user as the
* VM (this is only true for the host side and only when using hosted products)
*/
static bool vmci_transport_is_trusted(struct vsock_sock *vsock, u32 peer_cid)
{
return vsock->trusted ||
vmci_is_context_owner(peer_cid, vsock->owner->uid);
}
/* We allow sending datagrams to and receiving datagrams from a restricted VM
* only if it is trusted as described in vmci_transport_is_trusted.
*/
static bool vmci_transport_allow_dgram(struct vsock_sock *vsock, u32 peer_cid)
{
if (VMADDR_CID_HYPERVISOR == peer_cid)
return true;
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
if (vsock->cached_peer != peer_cid) {
vsock->cached_peer = peer_cid;
if (!vmci_transport_is_trusted(vsock, peer_cid) &&
(vmci_context_get_priv_flags(peer_cid) &
VMCI_PRIVILEGE_FLAG_RESTRICTED)) {
vsock->cached_peer_allow_dgram = false;
} else {
vsock->cached_peer_allow_dgram = true;
}
}
return vsock->cached_peer_allow_dgram;
}
static int
vmci_transport_queue_pair_alloc(struct vmci_qp **qpair,
struct vmci_handle *handle,
u64 produce_size,
u64 consume_size,
u32 peer, u32 flags, bool trusted)
{
int err = 0;
if (trusted) {
/* Try to allocate our queue pair as trusted. This will only
* work if vsock is running in the host.
*/
err = vmci_qpair_alloc(qpair, handle, produce_size,
consume_size,
peer, flags,
VMCI_PRIVILEGE_FLAG_TRUSTED);
if (err != VMCI_ERROR_NO_ACCESS)
goto out;
}
err = vmci_qpair_alloc(qpair, handle, produce_size, consume_size,
peer, flags, VMCI_NO_PRIVILEGE_FLAGS);
out:
if (err < 0) {
pr_err("Could not attach to queue pair with %d\n",
err);
err = vmci_transport_error_to_vsock_error(err);
}
return err;
}
static int
vmci_transport_datagram_create_hnd(u32 resource_id,
u32 flags,
vmci_datagram_recv_cb recv_cb,
void *client_data,
struct vmci_handle *out_handle)
{
int err = 0;
/* Try to allocate our datagram handler as trusted. This will only work
* if vsock is running in the host.
*/
err = vmci_datagram_create_handle_priv(resource_id, flags,
VMCI_PRIVILEGE_FLAG_TRUSTED,
recv_cb,
client_data, out_handle);
if (err == VMCI_ERROR_NO_ACCESS)
err = vmci_datagram_create_handle(resource_id, flags,
recv_cb, client_data,
out_handle);
return err;
}
/* This is invoked as part of a tasklet that's scheduled when the VMCI
* interrupt fires. This is run in bottom-half context and if it ever needs to
* sleep it should defer that work to a work queue.
*/
static int vmci_transport_recv_dgram_cb(void *data, struct vmci_datagram *dg)
{
struct sock *sk;
size_t size;
struct sk_buff *skb;
struct vsock_sock *vsk;
sk = (struct sock *)data;
/* This handler is privileged when this module is running on the host.
* We will get datagrams from all endpoints (even VMs that are in a
* restricted context). If we get one from a restricted context then
* the destination socket must be trusted.
*
* NOTE: We access the socket struct without holding the lock here.
* This is ok because the field we are interested is never modified
* outside of the create and destruct socket functions.
*/
vsk = vsock_sk(sk);
if (!vmci_transport_allow_dgram(vsk, dg->src.context))
return VMCI_ERROR_NO_ACCESS;
size = VMCI_DG_SIZE(dg);
/* Attach the packet to the socket's receive queue as an sk_buff. */
skb = alloc_skb(size, GFP_ATOMIC);
if (!skb)
return VMCI_ERROR_NO_MEM;
/* sk_receive_skb() will do a sock_put(), so hold here. */
sock_hold(sk);
skb_put(skb, size);
memcpy(skb->data, dg, size);
sk_receive_skb(sk, skb, 0);
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
return VMCI_SUCCESS;
}
static bool vmci_transport_stream_allow(u32 cid, u32 port)
{
static const u32 non_socket_contexts[] = {
VMADDR_CID_RESERVED,
};
int i;
BUILD_BUG_ON(sizeof(cid) != sizeof(*non_socket_contexts));
for (i = 0; i < ARRAY_SIZE(non_socket_contexts); i++) {
if (cid == non_socket_contexts[i])
return false;
}
return true;
}
/* This is invoked as part of a tasklet that's scheduled when the VMCI
* interrupt fires. This is run in bottom-half context but it defers most of
* its work to the packet handling work queue.
*/
static int vmci_transport_recv_stream_cb(void *data, struct vmci_datagram *dg)
{
struct sock *sk;
struct sockaddr_vm dst;
struct sockaddr_vm src;
struct vmci_transport_packet *pkt;
struct vsock_sock *vsk;
bool bh_process_pkt;
int err;
sk = NULL;
err = VMCI_SUCCESS;
bh_process_pkt = false;
/* Ignore incoming packets from contexts without sockets, or resources
* that aren't vsock implementations.
*/
if (!vmci_transport_stream_allow(dg->src.context, -1)
|| vmci_transport_peer_rid(dg->src.context) != dg->src.resource)
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
return VMCI_ERROR_NO_ACCESS;
if (VMCI_DG_SIZE(dg) < sizeof(*pkt))
/* Drop datagrams that do not contain full VSock packets. */
return VMCI_ERROR_INVALID_ARGS;
pkt = (struct vmci_transport_packet *)dg;
/* Find the socket that should handle this packet. First we look for a
* connected socket and if there is none we look for a socket bound to
* the destintation address.
*/
vsock_addr_init(&src, pkt->dg.src.context, pkt->src_port);
vsock_addr_init(&dst, pkt->dg.dst.context, pkt->dst_port);
sk = vsock_find_connected_socket(&src, &dst);
if (!sk) {
sk = vsock_find_bound_socket(&dst);
if (!sk) {
/* We could not find a socket for this specified
* address. If this packet is a RST, we just drop it.
* If it is another packet, we send a RST. Note that
* we do not send a RST reply to RSTs so that we do not
* continually send RSTs between two endpoints.
*
* Note that since this is a reply, dst is src and src
* is dst.
*/
if (vmci_transport_send_reset_bh(&dst, &src, pkt) < 0)
pr_err("unable to send reset\n");
err = VMCI_ERROR_NOT_FOUND;
goto out;
}
}
/* If the received packet type is beyond all types known to this
* implementation, reply with an invalid message. Hopefully this will
* help when implementing backwards compatibility in the future.
*/
if (pkt->type >= VMCI_TRANSPORT_PACKET_TYPE_MAX) {
vmci_transport_send_invalid_bh(&dst, &src);
err = VMCI_ERROR_INVALID_ARGS;
goto out;
}
/* This handler is privileged when this module is running on the host.
* We will get datagram connect requests from all endpoints (even VMs
* that are in a restricted context). If we get one from a restricted
* context then the destination socket must be trusted.
*
* NOTE: We access the socket struct without holding the lock here.
* This is ok because the field we are interested is never modified
* outside of the create and destruct socket functions.
*/
vsk = vsock_sk(sk);
if (!vmci_transport_allow_dgram(vsk, pkt->dg.src.context)) {
err = VMCI_ERROR_NO_ACCESS;
goto out;
}
/* We do most everything in a work queue, but let's fast path the
* notification of reads and writes to help data transfer performance.
* We can only do this if there is no process context code executing
* for this socket since that may change the state.
*/
bh_lock_sock(sk);
if (!sock_owned_by_user(sk)) {
/* The local context ID may be out of date, update it. */
vsk->local_addr.svm_cid = dst.svm_cid;
if (sk->sk_state == TCP_ESTABLISHED)
vmci_trans(vsk)->notify_ops->handle_notify_pkt(
sk, pkt, true, &dst, &src,
&bh_process_pkt);
}
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
bh_unlock_sock(sk);
if (!bh_process_pkt) {
struct vmci_transport_recv_pkt_info *recv_pkt_info;
recv_pkt_info = kmalloc(sizeof(*recv_pkt_info), GFP_ATOMIC);
if (!recv_pkt_info) {
if (vmci_transport_send_reset_bh(&dst, &src, pkt) < 0)
pr_err("unable to send reset\n");
err = VMCI_ERROR_NO_MEM;
goto out;
}
recv_pkt_info->sk = sk;
memcpy(&recv_pkt_info->pkt, pkt, sizeof(recv_pkt_info->pkt));
INIT_WORK(&recv_pkt_info->work, vmci_transport_recv_pkt_work);
schedule_work(&recv_pkt_info->work);
/* Clear sk so that the reference count incremented by one of
* the Find functions above is not decremented below. We need
* that reference count for the packet handler we've scheduled
* to run.
*/
sk = NULL;
}
out:
if (sk)
sock_put(sk);
return err;
}
static void vmci_transport_handle_detach(struct sock *sk)
{
struct vsock_sock *vsk;
vsk = vsock_sk(sk);
if (!vmci_handle_is_invalid(vmci_trans(vsk)->qp_handle)) {
sock_set_flag(sk, SOCK_DONE);
/* On a detach the peer will not be sending or receiving
* anymore.
*/
vsk->peer_shutdown = SHUTDOWN_MASK;
/* We should not be sending anymore since the peer won't be
* there to receive, but we can still receive if there is data
* left in our consume queue. If the local endpoint is a host,
* we can't call vsock_stream_has_data, since that may block,
* but a host endpoint can't read data once the VM has
* detached, so there is no available data in that case.
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
*/
if (vsk->local_addr.svm_cid == VMADDR_CID_HOST ||
vsock_stream_has_data(vsk) <= 0) {
if (sk->sk_state == TCP_SYN_SENT) {
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
/* The peer may detach from a queue pair while
* we are still in the connecting state, i.e.,
* if the peer VM is killed after attaching to
* a queue pair, but before we complete the
* handshake. In that case, we treat the detach
* event like a reset.
*/
sk->sk_state = TCP_CLOSE;
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
sk->sk_err = ECONNRESET;
sk->sk_error_report(sk);
return;
}
sk->sk_state = TCP_CLOSE;
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
}
sk->sk_state_change(sk);
}
}
static void vmci_transport_peer_detach_cb(u32 sub_id,
const struct vmci_event_data *e_data,
void *client_data)
{
struct vmci_transport *trans = client_data;
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
const struct vmci_event_payload_qp *e_payload;
e_payload = vmci_event_data_const_payload(e_data);
/* XXX This is lame, we should provide a way to lookup sockets by
* qp_handle.
*/
if (vmci_handle_is_invalid(e_payload->handle) ||
!vmci_handle_is_equal(trans->qp_handle, e_payload->handle))
return;
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
/* We don't ask for delayed CBs when we subscribe to this event (we
* pass 0 as flags to vmci_event_subscribe()). VMCI makes no
* guarantees in that case about what context we might be running in,
* so it could be BH or process, blockable or non-blockable. So we
* need to account for all possible contexts here.
*/
spin_lock_bh(&trans->lock);
if (!trans->sk)
goto out;
/* Apart from here, trans->lock is only grabbed as part of sk destruct,
* where trans->sk isn't locked.
*/
bh_lock_sock(trans->sk);
vmci_transport_handle_detach(trans->sk);
bh_unlock_sock(trans->sk);
out:
spin_unlock_bh(&trans->lock);
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
}
static void vmci_transport_qp_resumed_cb(u32 sub_id,
const struct vmci_event_data *e_data,
void *client_data)
{
vsock_for_each_connected_socket(vmci_transport_handle_detach);
}
static void vmci_transport_recv_pkt_work(struct work_struct *work)
{
struct vmci_transport_recv_pkt_info *recv_pkt_info;
struct vmci_transport_packet *pkt;
struct sock *sk;
recv_pkt_info =
container_of(work, struct vmci_transport_recv_pkt_info, work);
sk = recv_pkt_info->sk;
pkt = &recv_pkt_info->pkt;
lock_sock(sk);
/* The local context ID may be out of date. */
vsock_sk(sk)->local_addr.svm_cid = pkt->dg.dst.context;
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
switch (sk->sk_state) {
case TCP_LISTEN:
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
vmci_transport_recv_listen(sk, pkt);
break;
case TCP_SYN_SENT:
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
/* Processing of pending connections for servers goes through
* the listening socket, so see vmci_transport_recv_listen()
* for that path.
*/
vmci_transport_recv_connecting_client(sk, pkt);
break;
case TCP_ESTABLISHED:
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
vmci_transport_recv_connected(sk, pkt);
break;
default:
/* Because this function does not run in the same context as
* vmci_transport_recv_stream_cb it is possible that the
* socket has closed. We need to let the other side know or it
* could be sitting in a connect and hang forever. Send a
* reset to prevent that.
*/
vmci_transport_send_reset(sk, pkt);
break;
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
}
release_sock(sk);
kfree(recv_pkt_info);
/* Release reference obtained in the stream callback when we fetched
* this socket out of the bound or connected list.
*/
sock_put(sk);
}
static int vmci_transport_recv_listen(struct sock *sk,
struct vmci_transport_packet *pkt)
{
struct sock *pending;
struct vsock_sock *vpending;
int err;
u64 qp_size;
bool old_request = false;
bool old_pkt_proto = false;
err = 0;
/* Because we are in the listen state, we could be receiving a packet
* for ourself or any previous connection requests that we received.
* If it's the latter, we try to find a socket in our list of pending
* connections and, if we do, call the appropriate handler for the
* state that that socket is in. Otherwise we try to service the
* connection request.
*/
pending = vmci_transport_get_pending(sk, pkt);
if (pending) {
lock_sock(pending);
/* The local context ID may be out of date. */
vsock_sk(pending)->local_addr.svm_cid = pkt->dg.dst.context;
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
switch (pending->sk_state) {
case TCP_SYN_SENT:
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
err = vmci_transport_recv_connecting_server(sk,
pending,
pkt);
break;
default:
vmci_transport_send_reset(pending, pkt);
err = -EINVAL;
}
if (err < 0)
vsock_remove_pending(sk, pending);
release_sock(pending);
vmci_transport_release_pending(pending);
return err;
}
/* The listen state only accepts connection requests. Reply with a
* reset unless we received a reset.
*/
if (!(pkt->type == VMCI_TRANSPORT_PACKET_TYPE_REQUEST ||
pkt->type == VMCI_TRANSPORT_PACKET_TYPE_REQUEST2)) {
vmci_transport_reply_reset(pkt);
return -EINVAL;
}
if (pkt->u.size == 0) {
vmci_transport_reply_reset(pkt);
return -EINVAL;
}
/* If this socket can't accommodate this connection request, we send a
* reset. Otherwise we create and initialize a child socket and reply
* with a connection negotiation.
*/
if (sk->sk_ack_backlog >= sk->sk_max_ack_backlog) {
vmci_transport_reply_reset(pkt);
return -ECONNREFUSED;
}
pending = vsock_create_connected(sk);
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
if (!pending) {
vmci_transport_send_reset(sk, pkt);
return -ENOMEM;
}
vpending = vsock_sk(pending);
vsock_addr_init(&vpending->local_addr, pkt->dg.dst.context,
pkt->dst_port);
vsock_addr_init(&vpending->remote_addr, pkt->dg.src.context,
pkt->src_port);
vsock: add multi-transports support This patch adds the support of multiple transports in the VSOCK core. With the multi-transports support, we can use vsock with nested VMs (using also different hypervisors) loading both guest->host and host->guest transports at the same time. Major changes: - vsock core module can be loaded regardless of the transports - vsock_core_init() and vsock_core_exit() are renamed to vsock_core_register() and vsock_core_unregister() - vsock_core_register() has a feature parameter (H2G, G2H, DGRAM) to identify which directions the transport can handle and if it's support DGRAM (only vmci) - each stream socket is assigned to a transport when the remote CID is set (during the connect() or when we receive a connection request on a listener socket). The remote CID is used to decide which transport to use: - remote CID <= VMADDR_CID_HOST will use guest->host transport; - remote CID == local_cid (guest->host transport) will use guest->host transport for loopback (host->guest transports don't support loopback); - remote CID > VMADDR_CID_HOST will use host->guest transport; - listener sockets are not bound to any transports since no transport operations are done on it. In this way we can create a listener socket, also if the transports are not loaded or with VMADDR_CID_ANY to listen on all transports. - DGRAM sockets are handled as before, since only the vmci_transport provides this feature. Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-11-14 17:57:46 +08:00
err = vsock_assign_transport(vpending, vsock_sk(sk));
/* Transport assigned (looking at remote_addr) must be the same
* where we received the request.
*/
if (err || !vmci_check_transport(vpending)) {
vmci_transport_send_reset(sk, pkt);
sock_put(pending);
return err;
}
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
/* If the proposed size fits within our min/max, accept it. Otherwise
* propose our own size.
*/
if (pkt->u.size >= vpending->buffer_min_size &&
pkt->u.size <= vpending->buffer_max_size) {
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
qp_size = pkt->u.size;
} else {
qp_size = vpending->buffer_size;
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
}
/* Figure out if we are using old or new requests based on the
* overrides pkt types sent by our peer.
*/
if (vmci_transport_old_proto_override(&old_pkt_proto)) {
old_request = old_pkt_proto;
} else {
if (pkt->type == VMCI_TRANSPORT_PACKET_TYPE_REQUEST)
old_request = true;
else if (pkt->type == VMCI_TRANSPORT_PACKET_TYPE_REQUEST2)
old_request = false;
}
if (old_request) {
/* Handle a REQUEST (or override) */
u16 version = VSOCK_PROTO_INVALID;
if (vmci_transport_proto_to_notify_struct(
pending, &version, true))
err = vmci_transport_send_negotiate(pending, qp_size);
else
err = -EINVAL;
} else {
/* Handle a REQUEST2 (or override) */
int proto_int = pkt->proto;
int pos;
u16 active_proto_version = 0;
/* The list of possible protocols is the intersection of all
* protocols the client supports ... plus all the protocols we
* support.
*/
proto_int &= vmci_transport_new_proto_supported_versions();
/* We choose the highest possible protocol version and use that
* one.
*/
pos = fls(proto_int);
if (pos) {
active_proto_version = (1 << (pos - 1));
if (vmci_transport_proto_to_notify_struct(
pending, &active_proto_version, false))
err = vmci_transport_send_negotiate2(pending,
qp_size,
active_proto_version);
else
err = -EINVAL;
} else {
err = -EINVAL;
}
}
if (err < 0) {
vmci_transport_send_reset(sk, pkt);
sock_put(pending);
err = vmci_transport_error_to_vsock_error(err);
goto out;
}
vsock_add_pending(sk, pending);
sk_acceptq_added(sk);
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
pending->sk_state = TCP_SYN_SENT;
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
vmci_trans(vpending)->produce_size =
vmci_trans(vpending)->consume_size = qp_size;
vpending->buffer_size = qp_size;
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
vmci_trans(vpending)->notify_ops->process_request(pending);
/* We might never receive another message for this socket and it's not
* connected to any process, so we have to ensure it gets cleaned up
* ourself. Our delayed work function will take care of that. Note
* that we do not ever cancel this function since we have few
* guarantees about its state when calling cancel_delayed_work().
* Instead we hold a reference on the socket for that function and make
* it capable of handling cases where it needs to do nothing but
* release that reference.
*/
vpending->listener = sk;
sock_hold(sk);
sock_hold(pending);
schedule_delayed_work(&vpending->pending_work, HZ);
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
out:
return err;
}
static int
vmci_transport_recv_connecting_server(struct sock *listener,
struct sock *pending,
struct vmci_transport_packet *pkt)
{
struct vsock_sock *vpending;
struct vmci_handle handle;
struct vmci_qp *qpair;
bool is_local;
u32 flags;
u32 detach_sub_id;
int err;
int skerr;
vpending = vsock_sk(pending);
detach_sub_id = VMCI_INVALID_ID;
switch (pkt->type) {
case VMCI_TRANSPORT_PACKET_TYPE_OFFER:
if (vmci_handle_is_invalid(pkt->u.handle)) {
vmci_transport_send_reset(pending, pkt);
skerr = EPROTO;
err = -EINVAL;
goto destroy;
}
break;
default:
/* Close and cleanup the connection. */
vmci_transport_send_reset(pending, pkt);
skerr = EPROTO;
err = pkt->type == VMCI_TRANSPORT_PACKET_TYPE_RST ? 0 : -EINVAL;
goto destroy;
}
/* In order to complete the connection we need to attach to the offered
* queue pair and send an attach notification. We also subscribe to the
* detach event so we know when our peer goes away, and we do that
* before attaching so we don't miss an event. If all this succeeds,
* we update our state and wakeup anything waiting in accept() for a
* connection.
*/
/* We don't care about attach since we ensure the other side has
* attached by specifying the ATTACH_ONLY flag below.
*/
err = vmci_event_subscribe(VMCI_EVENT_QP_PEER_DETACH,
vmci_transport_peer_detach_cb,
vmci_trans(vpending), &detach_sub_id);
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
if (err < VMCI_SUCCESS) {
vmci_transport_send_reset(pending, pkt);
err = vmci_transport_error_to_vsock_error(err);
skerr = -err;
goto destroy;
}
vmci_trans(vpending)->detach_sub_id = detach_sub_id;
/* Now attach to the queue pair the client created. */
handle = pkt->u.handle;
/* vpending->local_addr always has a context id so we do not need to
* worry about VMADDR_CID_ANY in this case.
*/
is_local =
vpending->remote_addr.svm_cid == vpending->local_addr.svm_cid;
flags = VMCI_QPFLAG_ATTACH_ONLY;
flags |= is_local ? VMCI_QPFLAG_LOCAL : 0;
err = vmci_transport_queue_pair_alloc(
&qpair,
&handle,
vmci_trans(vpending)->produce_size,
vmci_trans(vpending)->consume_size,
pkt->dg.src.context,
flags,
vmci_transport_is_trusted(
vpending,
vpending->remote_addr.svm_cid));
if (err < 0) {
vmci_transport_send_reset(pending, pkt);
skerr = -err;
goto destroy;
}
vmci_trans(vpending)->qp_handle = handle;
vmci_trans(vpending)->qpair = qpair;
/* When we send the attach message, we must be ready to handle incoming
* control messages on the newly connected socket. So we move the
* pending socket to the connected state before sending the attach
* message. Otherwise, an incoming packet triggered by the attach being
* received by the peer may be processed concurrently with what happens
* below after sending the attach message, and that incoming packet
* will find the listening socket instead of the (currently) pending
* socket. Note that enqueueing the socket increments the reference
* count, so even if a reset comes before the connection is accepted,
* the socket will be valid until it is removed from the queue.
*
* If we fail sending the attach below, we remove the socket from the
* connected list and move the socket to TCP_CLOSE before
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
* releasing the lock, so a pending slow path processing of an incoming
* packet will not see the socket in the connected state in that case.
*/
pending->sk_state = TCP_ESTABLISHED;
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
vsock_insert_connected(vpending);
/* Notify our peer of our attach. */
err = vmci_transport_send_attach(pending, handle);
if (err < 0) {
vsock_remove_connected(vpending);
pr_err("Could not send attach\n");
vmci_transport_send_reset(pending, pkt);
err = vmci_transport_error_to_vsock_error(err);
skerr = -err;
goto destroy;
}
/* We have a connection. Move the now connected socket from the
* listener's pending list to the accept queue so callers of accept()
* can find it.
*/
vsock_remove_pending(listener, pending);
vsock_enqueue_accept(listener, pending);
/* Callers of accept() will be be waiting on the listening socket, not
* the pending socket.
*/
listener->sk_data_ready(listener);
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
return 0;
destroy:
pending->sk_err = skerr;
pending->sk_state = TCP_CLOSE;
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
/* As long as we drop our reference, all necessary cleanup will handle
* when the cleanup function drops its reference and our destruct
* implementation is called. Note that since the listen handler will
* remove pending from the pending list upon our failure, the cleanup
* function won't drop the additional reference, which is why we do it
* here.
*/
sock_put(pending);
return err;
}
static int
vmci_transport_recv_connecting_client(struct sock *sk,
struct vmci_transport_packet *pkt)
{
struct vsock_sock *vsk;
int err;
int skerr;
vsk = vsock_sk(sk);
switch (pkt->type) {
case VMCI_TRANSPORT_PACKET_TYPE_ATTACH:
if (vmci_handle_is_invalid(pkt->u.handle) ||
!vmci_handle_is_equal(pkt->u.handle,
vmci_trans(vsk)->qp_handle)) {
skerr = EPROTO;
err = -EINVAL;
goto destroy;
}
/* Signify the socket is connected and wakeup the waiter in
* connect(). Also place the socket in the connected table for
* accounting (it can already be found since it's in the bound
* table).
*/
sk->sk_state = TCP_ESTABLISHED;
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
sk->sk_socket->state = SS_CONNECTED;
vsock_insert_connected(vsk);
sk->sk_state_change(sk);
break;
case VMCI_TRANSPORT_PACKET_TYPE_NEGOTIATE:
case VMCI_TRANSPORT_PACKET_TYPE_NEGOTIATE2:
if (pkt->u.size == 0
|| pkt->dg.src.context != vsk->remote_addr.svm_cid
|| pkt->src_port != vsk->remote_addr.svm_port
|| !vmci_handle_is_invalid(vmci_trans(vsk)->qp_handle)
|| vmci_trans(vsk)->qpair
|| vmci_trans(vsk)->produce_size != 0
|| vmci_trans(vsk)->consume_size != 0
|| vmci_trans(vsk)->detach_sub_id != VMCI_INVALID_ID) {
skerr = EPROTO;
err = -EINVAL;
goto destroy;
}
err = vmci_transport_recv_connecting_client_negotiate(sk, pkt);
if (err) {
skerr = -err;
goto destroy;
}
break;
case VMCI_TRANSPORT_PACKET_TYPE_INVALID:
err = vmci_transport_recv_connecting_client_invalid(sk, pkt);
if (err) {
skerr = -err;
goto destroy;
}
break;
case VMCI_TRANSPORT_PACKET_TYPE_RST:
/* Older versions of the linux code (WS 6.5 / ESX 4.0) used to
* continue processing here after they sent an INVALID packet.
* This meant that we got a RST after the INVALID. We ignore a
* RST after an INVALID. The common code doesn't send the RST
* ... so we can hang if an old version of the common code
* fails between getting a REQUEST and sending an OFFER back.
* Not much we can do about it... except hope that it doesn't
* happen.
*/
if (vsk->ignore_connecting_rst) {
vsk->ignore_connecting_rst = false;
} else {
skerr = ECONNRESET;
err = 0;
goto destroy;
}
break;
default:
/* Close and cleanup the connection. */
skerr = EPROTO;
err = -EINVAL;
goto destroy;
}
return 0;
destroy:
vmci_transport_send_reset(sk, pkt);
sk->sk_state = TCP_CLOSE;
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
sk->sk_err = skerr;
sk->sk_error_report(sk);
return err;
}
static int vmci_transport_recv_connecting_client_negotiate(
struct sock *sk,
struct vmci_transport_packet *pkt)
{
int err;
struct vsock_sock *vsk;
struct vmci_handle handle;
struct vmci_qp *qpair;
u32 detach_sub_id;
bool is_local;
u32 flags;
bool old_proto = true;
bool old_pkt_proto;
u16 version;
vsk = vsock_sk(sk);
handle = VMCI_INVALID_HANDLE;
detach_sub_id = VMCI_INVALID_ID;
/* If we have gotten here then we should be past the point where old
* linux vsock could have sent the bogus rst.
*/
vsk->sent_request = false;
vsk->ignore_connecting_rst = false;
/* Verify that we're OK with the proposed queue pair size */
if (pkt->u.size < vsk->buffer_min_size ||
pkt->u.size > vsk->buffer_max_size) {
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
err = -EINVAL;
goto destroy;
}
/* At this point we know the CID the peer is using to talk to us. */
if (vsk->local_addr.svm_cid == VMADDR_CID_ANY)
vsk->local_addr.svm_cid = pkt->dg.dst.context;
/* Setup the notify ops to be the highest supported version that both
* the server and the client support.
*/
if (vmci_transport_old_proto_override(&old_pkt_proto)) {
old_proto = old_pkt_proto;
} else {
if (pkt->type == VMCI_TRANSPORT_PACKET_TYPE_NEGOTIATE)
old_proto = true;
else if (pkt->type == VMCI_TRANSPORT_PACKET_TYPE_NEGOTIATE2)
old_proto = false;
}
if (old_proto)
version = VSOCK_PROTO_INVALID;
else
version = pkt->proto;
if (!vmci_transport_proto_to_notify_struct(sk, &version, old_proto)) {
err = -EINVAL;
goto destroy;
}
/* Subscribe to detach events first.
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
*
* XXX We attach once for each queue pair created for now so it is easy
* to find the socket (it's provided), but later we should only
* subscribe once and add a way to lookup sockets by queue pair handle.
*/
err = vmci_event_subscribe(VMCI_EVENT_QP_PEER_DETACH,
vmci_transport_peer_detach_cb,
vmci_trans(vsk), &detach_sub_id);
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
if (err < VMCI_SUCCESS) {
err = vmci_transport_error_to_vsock_error(err);
goto destroy;
}
/* Make VMCI select the handle for us. */
handle = VMCI_INVALID_HANDLE;
is_local = vsk->remote_addr.svm_cid == vsk->local_addr.svm_cid;
flags = is_local ? VMCI_QPFLAG_LOCAL : 0;
err = vmci_transport_queue_pair_alloc(&qpair,
&handle,
pkt->u.size,
pkt->u.size,
vsk->remote_addr.svm_cid,
flags,
vmci_transport_is_trusted(
vsk,
vsk->
remote_addr.svm_cid));
if (err < 0)
goto destroy;
err = vmci_transport_send_qp_offer(sk, handle);
if (err < 0) {
err = vmci_transport_error_to_vsock_error(err);
goto destroy;
}
vmci_trans(vsk)->qp_handle = handle;
vmci_trans(vsk)->qpair = qpair;
vmci_trans(vsk)->produce_size = vmci_trans(vsk)->consume_size =
pkt->u.size;
vmci_trans(vsk)->detach_sub_id = detach_sub_id;
vmci_trans(vsk)->notify_ops->process_negotiate(sk);
return 0;
destroy:
if (detach_sub_id != VMCI_INVALID_ID)
vmci_event_unsubscribe(detach_sub_id);
if (!vmci_handle_is_invalid(handle))
vmci_qpair_detach(&qpair);
return err;
}
static int
vmci_transport_recv_connecting_client_invalid(struct sock *sk,
struct vmci_transport_packet *pkt)
{
int err = 0;
struct vsock_sock *vsk = vsock_sk(sk);
if (vsk->sent_request) {
vsk->sent_request = false;
vsk->ignore_connecting_rst = true;
err = vmci_transport_send_conn_request(sk, vsk->buffer_size);
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
if (err < 0)
err = vmci_transport_error_to_vsock_error(err);
else
err = 0;
}
return err;
}
static int vmci_transport_recv_connected(struct sock *sk,
struct vmci_transport_packet *pkt)
{
struct vsock_sock *vsk;
bool pkt_processed = false;
/* In cases where we are closing the connection, it's sufficient to
* mark the state change (and maybe error) and wake up any waiting
* threads. Since this is a connected socket, it's owned by a user
* process and will be cleaned up when the failure is passed back on
* the current or next system call. Our system call implementations
* must therefore check for error and state changes on entry and when
* being awoken.
*/
switch (pkt->type) {
case VMCI_TRANSPORT_PACKET_TYPE_SHUTDOWN:
if (pkt->u.mode) {
vsk = vsock_sk(sk);
vsk->peer_shutdown |= pkt->u.mode;
sk->sk_state_change(sk);
}
break;
case VMCI_TRANSPORT_PACKET_TYPE_RST:
vsk = vsock_sk(sk);
/* It is possible that we sent our peer a message (e.g a
* WAITING_READ) right before we got notified that the peer had
* detached. If that happens then we can get a RST pkt back
* from our peer even though there is data available for us to
* read. In that case, don't shutdown the socket completely but
* instead allow the local client to finish reading data off
* the queuepair. Always treat a RST pkt in connected mode like
* a clean shutdown.
*/
sock_set_flag(sk, SOCK_DONE);
vsk->peer_shutdown = SHUTDOWN_MASK;
if (vsock_stream_has_data(vsk) <= 0)
sk->sk_state = TCP_CLOSING;
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
sk->sk_state_change(sk);
break;
default:
vsk = vsock_sk(sk);
vmci_trans(vsk)->notify_ops->handle_notify_pkt(
sk, pkt, false, NULL, NULL,
&pkt_processed);
if (!pkt_processed)
return -EINVAL;
break;
}
return 0;
}
static int vmci_transport_socket_init(struct vsock_sock *vsk,
struct vsock_sock *psk)
{
vsk->trans = kmalloc(sizeof(struct vmci_transport), GFP_KERNEL);
if (!vsk->trans)
return -ENOMEM;
vmci_trans(vsk)->dg_handle = VMCI_INVALID_HANDLE;
vmci_trans(vsk)->qp_handle = VMCI_INVALID_HANDLE;
vmci_trans(vsk)->qpair = NULL;
vmci_trans(vsk)->produce_size = vmci_trans(vsk)->consume_size = 0;
vmci_trans(vsk)->detach_sub_id = VMCI_INVALID_ID;
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
vmci_trans(vsk)->notify_ops = NULL;
INIT_LIST_HEAD(&vmci_trans(vsk)->elem);
vmci_trans(vsk)->sk = &vsk->sk;
spin_lock_init(&vmci_trans(vsk)->lock);
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
return 0;
}
static void vmci_transport_free_resources(struct list_head *transport_list)
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
{
while (!list_empty(transport_list)) {
struct vmci_transport *transport =
list_first_entry(transport_list, struct vmci_transport,
elem);
list_del(&transport->elem);
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
if (transport->detach_sub_id != VMCI_INVALID_ID) {
vmci_event_unsubscribe(transport->detach_sub_id);
transport->detach_sub_id = VMCI_INVALID_ID;
}
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
if (!vmci_handle_is_invalid(transport->qp_handle)) {
vmci_qpair_detach(&transport->qpair);
transport->qp_handle = VMCI_INVALID_HANDLE;
transport->produce_size = 0;
transport->consume_size = 0;
}
kfree(transport);
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
}
}
static void vmci_transport_cleanup(struct work_struct *work)
{
LIST_HEAD(pending);
spin_lock_bh(&vmci_transport_cleanup_lock);
list_replace_init(&vmci_transport_cleanup_list, &pending);
spin_unlock_bh(&vmci_transport_cleanup_lock);
vmci_transport_free_resources(&pending);
}
static void vmci_transport_destruct(struct vsock_sock *vsk)
{
/* transport can be NULL if we hit a failure at init() time */
if (!vmci_trans(vsk))
return;
/* Ensure that the detach callback doesn't use the sk/vsk
* we are about to destruct.
*/
spin_lock_bh(&vmci_trans(vsk)->lock);
vmci_trans(vsk)->sk = NULL;
spin_unlock_bh(&vmci_trans(vsk)->lock);
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
if (vmci_trans(vsk)->notify_ops)
vmci_trans(vsk)->notify_ops->socket_destruct(vsk);
spin_lock_bh(&vmci_transport_cleanup_lock);
list_add(&vmci_trans(vsk)->elem, &vmci_transport_cleanup_list);
spin_unlock_bh(&vmci_transport_cleanup_lock);
schedule_work(&vmci_transport_cleanup_work);
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
vsk->trans = NULL;
}
static void vmci_transport_release(struct vsock_sock *vsk)
{
vsock_remove_sock(vsk);
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
if (!vmci_handle_is_invalid(vmci_trans(vsk)->dg_handle)) {
vmci_datagram_destroy_handle(vmci_trans(vsk)->dg_handle);
vmci_trans(vsk)->dg_handle = VMCI_INVALID_HANDLE;
}
}
static int vmci_transport_dgram_bind(struct vsock_sock *vsk,
struct sockaddr_vm *addr)
{
u32 port;
u32 flags;
int err;
/* VMCI will select a resource ID for us if we provide
* VMCI_INVALID_ID.
*/
port = addr->svm_port == VMADDR_PORT_ANY ?
VMCI_INVALID_ID : addr->svm_port;
if (port <= LAST_RESERVED_PORT && !capable(CAP_NET_BIND_SERVICE))
return -EACCES;
flags = addr->svm_cid == VMADDR_CID_ANY ?
VMCI_FLAG_ANYCID_DG_HND : 0;
err = vmci_transport_datagram_create_hnd(port, flags,
vmci_transport_recv_dgram_cb,
&vsk->sk,
&vmci_trans(vsk)->dg_handle);
if (err < VMCI_SUCCESS)
return vmci_transport_error_to_vsock_error(err);
vsock_addr_init(&vsk->local_addr, addr->svm_cid,
vmci_trans(vsk)->dg_handle.resource);
return 0;
}
static int vmci_transport_dgram_enqueue(
struct vsock_sock *vsk,
struct sockaddr_vm *remote_addr,
struct msghdr *msg,
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
size_t len)
{
int err;
struct vmci_datagram *dg;
if (len > VMCI_MAX_DG_PAYLOAD_SIZE)
return -EMSGSIZE;
if (!vmci_transport_allow_dgram(vsk, remote_addr->svm_cid))
return -EPERM;
/* Allocate a buffer for the user's message and our packet header. */
dg = kmalloc(len + sizeof(*dg), GFP_KERNEL);
if (!dg)
return -ENOMEM;
memcpy_from_msg(VMCI_DG_PAYLOAD(dg), msg, len);
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
dg->dst = vmci_make_handle(remote_addr->svm_cid,
remote_addr->svm_port);
dg->src = vmci_make_handle(vsk->local_addr.svm_cid,
vsk->local_addr.svm_port);
dg->payload_size = len;
err = vmci_datagram_send(dg);
kfree(dg);
if (err < 0)
return vmci_transport_error_to_vsock_error(err);
return err - sizeof(*dg);
}
static int vmci_transport_dgram_dequeue(struct vsock_sock *vsk,
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
struct msghdr *msg, size_t len,
int flags)
{
int err;
int noblock;
struct vmci_datagram *dg;
size_t payload_len;
struct sk_buff *skb;
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 (!skb)
return err;
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
dg = (struct vmci_datagram *)skb->data;
if (!dg)
/* err is 0, meaning we read zero bytes. */
goto out;
payload_len = dg->payload_size;
/* Ensure the sk_buff matches the payload size claimed in the packet. */
if (payload_len != skb->len - sizeof(*dg)) {
err = -EINVAL;
goto out;
}
if (payload_len > len) {
payload_len = len;
msg->msg_flags |= MSG_TRUNC;
}
/* Place the datagram payload in the user's iovec. */
err = skb_copy_datagram_msg(skb, sizeof(*dg), msg, payload_len);
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
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: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
vsock_addr_init(vm_addr, dg->src.context, dg->src.resource);
msg->msg_namelen = sizeof(*vm_addr);
}
err = payload_len;
out:
skb_free_datagram(&vsk->sk, skb);
return err;
}
static bool vmci_transport_dgram_allow(u32 cid, u32 port)
{
if (cid == VMADDR_CID_HYPERVISOR) {
/* Registrations of PBRPC Servers do not modify VMX/Hypervisor
* state and are allowed.
*/
return port == VMCI_UNITY_PBRPC_REGISTER;
}
return true;
}
static int vmci_transport_connect(struct vsock_sock *vsk)
{
int err;
bool old_pkt_proto = false;
struct sock *sk = &vsk->sk;
if (vmci_transport_old_proto_override(&old_pkt_proto) &&
old_pkt_proto) {
err = vmci_transport_send_conn_request(sk, vsk->buffer_size);
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
if (err < 0) {
sk->sk_state = TCP_CLOSE;
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
return err;
}
} else {
int supported_proto_versions =
vmci_transport_new_proto_supported_versions();
err = vmci_transport_send_conn_request2(sk, vsk->buffer_size,
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
supported_proto_versions);
if (err < 0) {
sk->sk_state = TCP_CLOSE;
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
return err;
}
vsk->sent_request = true;
}
return err;
}
static ssize_t vmci_transport_stream_dequeue(
struct vsock_sock *vsk,
struct msghdr *msg,
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
size_t len,
int flags)
{
if (flags & MSG_PEEK)
return vmci_qpair_peekv(vmci_trans(vsk)->qpair, msg, len, 0);
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
else
return vmci_qpair_dequev(vmci_trans(vsk)->qpair, msg, len, 0);
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
}
static ssize_t vmci_transport_stream_enqueue(
struct vsock_sock *vsk,
struct msghdr *msg,
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
size_t len)
{
return vmci_qpair_enquev(vmci_trans(vsk)->qpair, msg, len, 0);
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
}
static s64 vmci_transport_stream_has_data(struct vsock_sock *vsk)
{
return vmci_qpair_consume_buf_ready(vmci_trans(vsk)->qpair);
}
static s64 vmci_transport_stream_has_space(struct vsock_sock *vsk)
{
return vmci_qpair_produce_free_space(vmci_trans(vsk)->qpair);
}
static u64 vmci_transport_stream_rcvhiwat(struct vsock_sock *vsk)
{
return vmci_trans(vsk)->consume_size;
}
static bool vmci_transport_stream_is_active(struct vsock_sock *vsk)
{
return !vmci_handle_is_invalid(vmci_trans(vsk)->qp_handle);
}
static int vmci_transport_notify_poll_in(
struct vsock_sock *vsk,
size_t target,
bool *data_ready_now)
{
return vmci_trans(vsk)->notify_ops->poll_in(
&vsk->sk, target, data_ready_now);
}
static int vmci_transport_notify_poll_out(
struct vsock_sock *vsk,
size_t target,
bool *space_available_now)
{
return vmci_trans(vsk)->notify_ops->poll_out(
&vsk->sk, target, space_available_now);
}
static int vmci_transport_notify_recv_init(
struct vsock_sock *vsk,
size_t target,
struct vsock_transport_recv_notify_data *data)
{
return vmci_trans(vsk)->notify_ops->recv_init(
&vsk->sk, target,
(struct vmci_transport_recv_notify_data *)data);
}
static int vmci_transport_notify_recv_pre_block(
struct vsock_sock *vsk,
size_t target,
struct vsock_transport_recv_notify_data *data)
{
return vmci_trans(vsk)->notify_ops->recv_pre_block(
&vsk->sk, target,
(struct vmci_transport_recv_notify_data *)data);
}
static int vmci_transport_notify_recv_pre_dequeue(
struct vsock_sock *vsk,
size_t target,
struct vsock_transport_recv_notify_data *data)
{
return vmci_trans(vsk)->notify_ops->recv_pre_dequeue(
&vsk->sk, target,
(struct vmci_transport_recv_notify_data *)data);
}
static int vmci_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 vmci_trans(vsk)->notify_ops->recv_post_dequeue(
&vsk->sk, target, copied, data_read,
(struct vmci_transport_recv_notify_data *)data);
}
static int vmci_transport_notify_send_init(
struct vsock_sock *vsk,
struct vsock_transport_send_notify_data *data)
{
return vmci_trans(vsk)->notify_ops->send_init(
&vsk->sk,
(struct vmci_transport_send_notify_data *)data);
}
static int vmci_transport_notify_send_pre_block(
struct vsock_sock *vsk,
struct vsock_transport_send_notify_data *data)
{
return vmci_trans(vsk)->notify_ops->send_pre_block(
&vsk->sk,
(struct vmci_transport_send_notify_data *)data);
}
static int vmci_transport_notify_send_pre_enqueue(
struct vsock_sock *vsk,
struct vsock_transport_send_notify_data *data)
{
return vmci_trans(vsk)->notify_ops->send_pre_enqueue(
&vsk->sk,
(struct vmci_transport_send_notify_data *)data);
}
static int vmci_transport_notify_send_post_enqueue(
struct vsock_sock *vsk,
ssize_t written,
struct vsock_transport_send_notify_data *data)
{
return vmci_trans(vsk)->notify_ops->send_post_enqueue(
&vsk->sk, written,
(struct vmci_transport_send_notify_data *)data);
}
static bool vmci_transport_old_proto_override(bool *old_pkt_proto)
{
if (PROTOCOL_OVERRIDE != -1) {
if (PROTOCOL_OVERRIDE == 0)
*old_pkt_proto = true;
else
*old_pkt_proto = false;
pr_info("Proto override in use\n");
return true;
}
return false;
}
static bool vmci_transport_proto_to_notify_struct(struct sock *sk,
u16 *proto,
bool old_pkt_proto)
{
struct vsock_sock *vsk = vsock_sk(sk);
if (old_pkt_proto) {
if (*proto != VSOCK_PROTO_INVALID) {
pr_err("Can't set both an old and new protocol\n");
return false;
}
vmci_trans(vsk)->notify_ops = &vmci_transport_notify_pkt_ops;
goto exit;
}
switch (*proto) {
case VSOCK_PROTO_PKT_ON_NOTIFY:
vmci_trans(vsk)->notify_ops =
&vmci_transport_notify_pkt_q_state_ops;
break;
default:
pr_err("Unknown notify protocol version\n");
return false;
}
exit:
vmci_trans(vsk)->notify_ops->socket_init(sk);
return true;
}
static u16 vmci_transport_new_proto_supported_versions(void)
{
if (PROTOCOL_OVERRIDE != -1)
return PROTOCOL_OVERRIDE;
return VSOCK_PROTO_ALL_SUPPORTED;
}
static u32 vmci_transport_get_local_cid(void)
{
return vmci_get_context_id();
}
vsock: add multi-transports support This patch adds the support of multiple transports in the VSOCK core. With the multi-transports support, we can use vsock with nested VMs (using also different hypervisors) loading both guest->host and host->guest transports at the same time. Major changes: - vsock core module can be loaded regardless of the transports - vsock_core_init() and vsock_core_exit() are renamed to vsock_core_register() and vsock_core_unregister() - vsock_core_register() has a feature parameter (H2G, G2H, DGRAM) to identify which directions the transport can handle and if it's support DGRAM (only vmci) - each stream socket is assigned to a transport when the remote CID is set (during the connect() or when we receive a connection request on a listener socket). The remote CID is used to decide which transport to use: - remote CID <= VMADDR_CID_HOST will use guest->host transport; - remote CID == local_cid (guest->host transport) will use guest->host transport for loopback (host->guest transports don't support loopback); - remote CID > VMADDR_CID_HOST will use host->guest transport; - listener sockets are not bound to any transports since no transport operations are done on it. In this way we can create a listener socket, also if the transports are not loaded or with VMADDR_CID_ANY to listen on all transports. - DGRAM sockets are handled as before, since only the vmci_transport provides this feature. Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-11-14 17:57:46 +08:00
static struct vsock_transport vmci_transport = {
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
.init = vmci_transport_socket_init,
.destruct = vmci_transport_destruct,
.release = vmci_transport_release,
.connect = vmci_transport_connect,
.dgram_bind = vmci_transport_dgram_bind,
.dgram_dequeue = vmci_transport_dgram_dequeue,
.dgram_enqueue = vmci_transport_dgram_enqueue,
.dgram_allow = vmci_transport_dgram_allow,
.stream_dequeue = vmci_transport_stream_dequeue,
.stream_enqueue = vmci_transport_stream_enqueue,
.stream_has_data = vmci_transport_stream_has_data,
.stream_has_space = vmci_transport_stream_has_space,
.stream_rcvhiwat = vmci_transport_stream_rcvhiwat,
.stream_is_active = vmci_transport_stream_is_active,
.stream_allow = vmci_transport_stream_allow,
.notify_poll_in = vmci_transport_notify_poll_in,
.notify_poll_out = vmci_transport_notify_poll_out,
.notify_recv_init = vmci_transport_notify_recv_init,
.notify_recv_pre_block = vmci_transport_notify_recv_pre_block,
.notify_recv_pre_dequeue = vmci_transport_notify_recv_pre_dequeue,
.notify_recv_post_dequeue = vmci_transport_notify_recv_post_dequeue,
.notify_send_init = vmci_transport_notify_send_init,
.notify_send_pre_block = vmci_transport_notify_send_pre_block,
.notify_send_pre_enqueue = vmci_transport_notify_send_pre_enqueue,
.notify_send_post_enqueue = vmci_transport_notify_send_post_enqueue,
.shutdown = vmci_transport_shutdown,
.get_local_cid = vmci_transport_get_local_cid,
};
vsock: add multi-transports support This patch adds the support of multiple transports in the VSOCK core. With the multi-transports support, we can use vsock with nested VMs (using also different hypervisors) loading both guest->host and host->guest transports at the same time. Major changes: - vsock core module can be loaded regardless of the transports - vsock_core_init() and vsock_core_exit() are renamed to vsock_core_register() and vsock_core_unregister() - vsock_core_register() has a feature parameter (H2G, G2H, DGRAM) to identify which directions the transport can handle and if it's support DGRAM (only vmci) - each stream socket is assigned to a transport when the remote CID is set (during the connect() or when we receive a connection request on a listener socket). The remote CID is used to decide which transport to use: - remote CID <= VMADDR_CID_HOST will use guest->host transport; - remote CID == local_cid (guest->host transport) will use guest->host transport for loopback (host->guest transports don't support loopback); - remote CID > VMADDR_CID_HOST will use host->guest transport; - listener sockets are not bound to any transports since no transport operations are done on it. In this way we can create a listener socket, also if the transports are not loaded or with VMADDR_CID_ANY to listen on all transports. - DGRAM sockets are handled as before, since only the vmci_transport provides this feature. Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-11-14 17:57:46 +08:00
static bool vmci_check_transport(struct vsock_sock *vsk)
{
return vsk->transport == &vmci_transport;
}
void vmci_vsock_transport_cb(bool is_host)
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
{
int features;
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
if (is_host)
features = VSOCK_TRANSPORT_F_H2G;
else
features = VSOCK_TRANSPORT_F_G2H;
vsock: add multi-transports support This patch adds the support of multiple transports in the VSOCK core. With the multi-transports support, we can use vsock with nested VMs (using also different hypervisors) loading both guest->host and host->guest transports at the same time. Major changes: - vsock core module can be loaded regardless of the transports - vsock_core_init() and vsock_core_exit() are renamed to vsock_core_register() and vsock_core_unregister() - vsock_core_register() has a feature parameter (H2G, G2H, DGRAM) to identify which directions the transport can handle and if it's support DGRAM (only vmci) - each stream socket is assigned to a transport when the remote CID is set (during the connect() or when we receive a connection request on a listener socket). The remote CID is used to decide which transport to use: - remote CID <= VMADDR_CID_HOST will use guest->host transport; - remote CID == local_cid (guest->host transport) will use guest->host transport for loopback (host->guest transports don't support loopback); - remote CID > VMADDR_CID_HOST will use host->guest transport; - listener sockets are not bound to any transports since no transport operations are done on it. In this way we can create a listener socket, also if the transports are not loaded or with VMADDR_CID_ANY to listen on all transports. - DGRAM sockets are handled as before, since only the vmci_transport provides this feature. Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-11-14 17:57:46 +08:00
vsock_core_register(&vmci_transport, features);
}
vsock: add multi-transports support This patch adds the support of multiple transports in the VSOCK core. With the multi-transports support, we can use vsock with nested VMs (using also different hypervisors) loading both guest->host and host->guest transports at the same time. Major changes: - vsock core module can be loaded regardless of the transports - vsock_core_init() and vsock_core_exit() are renamed to vsock_core_register() and vsock_core_unregister() - vsock_core_register() has a feature parameter (H2G, G2H, DGRAM) to identify which directions the transport can handle and if it's support DGRAM (only vmci) - each stream socket is assigned to a transport when the remote CID is set (during the connect() or when we receive a connection request on a listener socket). The remote CID is used to decide which transport to use: - remote CID <= VMADDR_CID_HOST will use guest->host transport; - remote CID == local_cid (guest->host transport) will use guest->host transport for loopback (host->guest transports don't support loopback); - remote CID > VMADDR_CID_HOST will use host->guest transport; - listener sockets are not bound to any transports since no transport operations are done on it. In this way we can create a listener socket, also if the transports are not loaded or with VMADDR_CID_ANY to listen on all transports. - DGRAM sockets are handled as before, since only the vmci_transport provides this feature. Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-11-14 17:57:46 +08:00
static int __init vmci_transport_init(void)
{
int err;
vsock: add multi-transports support This patch adds the support of multiple transports in the VSOCK core. With the multi-transports support, we can use vsock with nested VMs (using also different hypervisors) loading both guest->host and host->guest transports at the same time. Major changes: - vsock core module can be loaded regardless of the transports - vsock_core_init() and vsock_core_exit() are renamed to vsock_core_register() and vsock_core_unregister() - vsock_core_register() has a feature parameter (H2G, G2H, DGRAM) to identify which directions the transport can handle and if it's support DGRAM (only vmci) - each stream socket is assigned to a transport when the remote CID is set (during the connect() or when we receive a connection request on a listener socket). The remote CID is used to decide which transport to use: - remote CID <= VMADDR_CID_HOST will use guest->host transport; - remote CID == local_cid (guest->host transport) will use guest->host transport for loopback (host->guest transports don't support loopback); - remote CID > VMADDR_CID_HOST will use host->guest transport; - listener sockets are not bound to any transports since no transport operations are done on it. In this way we can create a listener socket, also if the transports are not loaded or with VMADDR_CID_ANY to listen on all transports. - DGRAM sockets are handled as before, since only the vmci_transport provides this feature. Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-11-14 17:57:46 +08:00
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
/* Create the datagram handle that we will use to send and receive all
* VSocket control messages for this context.
*/
err = vmci_transport_datagram_create_hnd(VMCI_TRANSPORT_PACKET_RID,
VMCI_FLAG_ANYCID_DG_HND,
vmci_transport_recv_stream_cb,
NULL,
&vmci_transport_stream_handle);
if (err < VMCI_SUCCESS) {
pr_err("Unable to create datagram handle. (%d)\n", err);
return vmci_transport_error_to_vsock_error(err);
}
err = vmci_event_subscribe(VMCI_EVENT_QP_RESUMED,
vmci_transport_qp_resumed_cb,
NULL, &vmci_transport_qp_resumed_sub_id);
if (err < VMCI_SUCCESS) {
pr_err("Unable to subscribe to resumed event. (%d)\n", err);
err = vmci_transport_error_to_vsock_error(err);
vmci_transport_qp_resumed_sub_id = VMCI_INVALID_ID;
goto err_destroy_stream_handle;
}
/* Register only with dgram feature, other features (H2G, G2H) will be
* registered when the first host or guest becomes active.
*/
err = vsock_core_register(&vmci_transport, VSOCK_TRANSPORT_F_DGRAM);
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
if (err < 0)
goto err_unsubscribe;
err = vmci_register_vsock_callback(vmci_vsock_transport_cb);
if (err < 0)
goto err_unregister;
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
return 0;
err_unregister:
vsock_core_unregister(&vmci_transport);
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
err_unsubscribe:
vmci_event_unsubscribe(vmci_transport_qp_resumed_sub_id);
err_destroy_stream_handle:
vmci_datagram_destroy_handle(vmci_transport_stream_handle);
return err;
}
module_init(vmci_transport_init);
static void __exit vmci_transport_exit(void)
{
cancel_work_sync(&vmci_transport_cleanup_work);
vmci_transport_free_resources(&vmci_transport_cleanup_list);
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
if (!vmci_handle_is_invalid(vmci_transport_stream_handle)) {
if (vmci_datagram_destroy_handle(
vmci_transport_stream_handle) != VMCI_SUCCESS)
pr_err("Couldn't destroy datagram handle\n");
vmci_transport_stream_handle = VMCI_INVALID_HANDLE;
}
if (vmci_transport_qp_resumed_sub_id != VMCI_INVALID_ID) {
vmci_event_unsubscribe(vmci_transport_qp_resumed_sub_id);
vmci_transport_qp_resumed_sub_id = VMCI_INVALID_ID;
}
vmci_register_vsock_callback(NULL);
vsock: add multi-transports support This patch adds the support of multiple transports in the VSOCK core. With the multi-transports support, we can use vsock with nested VMs (using also different hypervisors) loading both guest->host and host->guest transports at the same time. Major changes: - vsock core module can be loaded regardless of the transports - vsock_core_init() and vsock_core_exit() are renamed to vsock_core_register() and vsock_core_unregister() - vsock_core_register() has a feature parameter (H2G, G2H, DGRAM) to identify which directions the transport can handle and if it's support DGRAM (only vmci) - each stream socket is assigned to a transport when the remote CID is set (during the connect() or when we receive a connection request on a listener socket). The remote CID is used to decide which transport to use: - remote CID <= VMADDR_CID_HOST will use guest->host transport; - remote CID == local_cid (guest->host transport) will use guest->host transport for loopback (host->guest transports don't support loopback); - remote CID > VMADDR_CID_HOST will use host->guest transport; - listener sockets are not bound to any transports since no transport operations are done on it. In this way we can create a listener socket, also if the transports are not loaded or with VMADDR_CID_ANY to listen on all transports. - DGRAM sockets are handled as before, since only the vmci_transport provides this feature. Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-11-14 17:57:46 +08:00
vsock_core_unregister(&vmci_transport);
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
}
module_exit(vmci_transport_exit);
MODULE_AUTHOR("VMware, Inc.");
MODULE_DESCRIPTION("VMCI transport for Virtual Sockets");
MODULE_VERSION("1.0.5.0-k");
VSOCK: Introduce VM Sockets VM Sockets allows communication between virtual machines and the hypervisor. User level applications both in a virtual machine and on the host can use the VM Sockets API, which facilitates fast and efficient communication between guest virtual machines and their host. A socket address family, designed to be compatible with UDP and TCP at the interface level, is provided. Today, VM Sockets is used by various VMware Tools components inside the guest for zero-config, network-less access to VMware host services. In addition to this, VMware's users are using VM Sockets for various applications, where network access of the virtual machine is restricted or non-existent. Examples of this are VMs communicating with device proxies for proprietary hardware running as host applications and automated testing of applications running within virtual machines. The VMware VM Sockets are similar to other socket types, like Berkeley UNIX socket interface. The VM Sockets module supports both connection-oriented stream sockets like TCP, and connectionless datagram sockets like UDP. The VM Sockets protocol family is defined as "AF_VSOCK" and the socket operations split for SOCK_DGRAM and SOCK_STREAM. For additional information about the use of VM Sockets, please refer to the VM Sockets Programming Guide available at: https://www.vmware.com/support/developer/vmci-sdk/ Signed-off-by: George Zhang <georgezhang@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Andy king <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-06 22:23:56 +08:00
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("vmware_vsock");
MODULE_ALIAS_NETPROTO(PF_VSOCK);