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4ef7ea9195
In the vsock vmci_transport driver, sock_put wasn't safe to call in interrupt context, since that may call the vsock destructor which in turn calls several functions that should only be called from process context. This change defers the callling of these functions to a worker thread. All these functions were deallocation of resources related to the transport itself. Furthermore, an unused callback was removed to simplify the cleanup. Multiple customers have been hitting this issue when using VMware tools on vSphere 2015. Also added a version to the vmci transport module (starting from 1.0.2.0-k since up until now it appears that this module was sharing version with vsock that is currently at 1.0.1.0-k). Reviewed-by: Aditya Asarwade <asarwade@vmware.com> Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Jorgen Hansen <jhansen@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
145 lines
4.1 KiB
C
145 lines
4.1 KiB
C
/*
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* VMware vSockets Driver
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*
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* Copyright (C) 2013 VMware, Inc. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation version 2 and no later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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#ifndef _VMCI_TRANSPORT_H_
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#define _VMCI_TRANSPORT_H_
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#include <linux/vmw_vmci_defs.h>
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#include <linux/vmw_vmci_api.h>
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#include <net/vsock_addr.h>
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#include <net/af_vsock.h>
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/* If the packet format changes in a release then this should change too. */
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#define VMCI_TRANSPORT_PACKET_VERSION 1
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/* The resource ID on which control packets are sent. */
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#define VMCI_TRANSPORT_PACKET_RID 1
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/* The resource ID on which control packets are sent to the hypervisor. */
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#define VMCI_TRANSPORT_HYPERVISOR_PACKET_RID 15
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#define VSOCK_PROTO_INVALID 0
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#define VSOCK_PROTO_PKT_ON_NOTIFY (1 << 0)
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#define VSOCK_PROTO_ALL_SUPPORTED (VSOCK_PROTO_PKT_ON_NOTIFY)
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#define vmci_trans(_vsk) ((struct vmci_transport *)((_vsk)->trans))
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enum vmci_transport_packet_type {
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VMCI_TRANSPORT_PACKET_TYPE_INVALID = 0,
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VMCI_TRANSPORT_PACKET_TYPE_REQUEST,
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VMCI_TRANSPORT_PACKET_TYPE_NEGOTIATE,
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VMCI_TRANSPORT_PACKET_TYPE_OFFER,
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VMCI_TRANSPORT_PACKET_TYPE_ATTACH,
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VMCI_TRANSPORT_PACKET_TYPE_WROTE,
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VMCI_TRANSPORT_PACKET_TYPE_READ,
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VMCI_TRANSPORT_PACKET_TYPE_RST,
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VMCI_TRANSPORT_PACKET_TYPE_SHUTDOWN,
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VMCI_TRANSPORT_PACKET_TYPE_WAITING_WRITE,
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VMCI_TRANSPORT_PACKET_TYPE_WAITING_READ,
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VMCI_TRANSPORT_PACKET_TYPE_REQUEST2,
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VMCI_TRANSPORT_PACKET_TYPE_NEGOTIATE2,
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VMCI_TRANSPORT_PACKET_TYPE_MAX
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};
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struct vmci_transport_waiting_info {
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u64 generation;
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u64 offset;
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};
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/* Control packet type for STREAM sockets. DGRAMs have no control packets nor
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* special packet header for data packets, they are just raw VMCI DGRAM
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* messages. For STREAMs, control packets are sent over the control channel
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* while data is written and read directly from queue pairs with no packet
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* format.
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*/
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struct vmci_transport_packet {
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struct vmci_datagram dg;
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u8 version;
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u8 type;
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u16 proto;
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u32 src_port;
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u32 dst_port;
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u32 _reserved2;
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union {
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u64 size;
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u64 mode;
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struct vmci_handle handle;
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struct vmci_transport_waiting_info wait;
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} u;
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};
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struct vmci_transport_notify_pkt {
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u64 write_notify_window;
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u64 write_notify_min_window;
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bool peer_waiting_read;
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bool peer_waiting_write;
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bool peer_waiting_write_detected;
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bool sent_waiting_read;
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bool sent_waiting_write;
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struct vmci_transport_waiting_info peer_waiting_read_info;
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struct vmci_transport_waiting_info peer_waiting_write_info;
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u64 produce_q_generation;
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u64 consume_q_generation;
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};
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struct vmci_transport_notify_pkt_q_state {
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u64 write_notify_window;
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u64 write_notify_min_window;
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bool peer_waiting_write;
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bool peer_waiting_write_detected;
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};
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union vmci_transport_notify {
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struct vmci_transport_notify_pkt pkt;
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struct vmci_transport_notify_pkt_q_state pkt_q_state;
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};
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/* Our transport-specific data. */
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struct vmci_transport {
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/* For DGRAMs. */
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struct vmci_handle dg_handle;
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/* For STREAMs. */
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struct vmci_handle qp_handle;
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struct vmci_qp *qpair;
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u64 produce_size;
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u64 consume_size;
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u64 queue_pair_size;
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u64 queue_pair_min_size;
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u64 queue_pair_max_size;
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u32 detach_sub_id;
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union vmci_transport_notify notify;
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struct vmci_transport_notify_ops *notify_ops;
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struct list_head elem;
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struct sock *sk;
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spinlock_t lock; /* protects sk. */
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};
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int vmci_transport_register(void);
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void vmci_transport_unregister(void);
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int vmci_transport_send_wrote_bh(struct sockaddr_vm *dst,
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struct sockaddr_vm *src);
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int vmci_transport_send_read_bh(struct sockaddr_vm *dst,
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struct sockaddr_vm *src);
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int vmci_transport_send_wrote(struct sock *sk);
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int vmci_transport_send_read(struct sock *sk);
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int vmci_transport_send_waiting_write(struct sock *sk,
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struct vmci_transport_waiting_info *wait);
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int vmci_transport_send_waiting_read(struct sock *sk,
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struct vmci_transport_waiting_info *wait);
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#endif
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