vmci_host.c | Explore in Territory

// SPDX-License-Identifier: GPL-2.0-only
/*
 * VMware VMCI Driver
 *
 * Copyright (C) 2012 VMware, Inc. All rights reserved.
 */

#include <linux/vmw_vmci_defs.h>
#include <linux/vmw_vmci_api.h>
#include <linux/miscdevice.h>
#include <linux/interrupt.h>
#include <linux/highmem.h>
#include <linux/atomic.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/sched.h>
#include <linux/cred.h>
#include <linux/slab.h>
#include <linux/file.h>
#include <linux/init.h>
#include <linux/poll.h>
#include <linux/pci.h>
#include <linux/smp.h>
#include <linux/fs.h>
#include <linux/io.h>

#include "vmci_handle_array.h"
#include "vmci_queue_pair.h"
#include "vmci_datagram.h"
#include "vmci_doorbell.h"
#include "vmci_resource.h"
#include "vmci_context.h"
#include "vmci_driver.h"
#include "vmci_event.h"

#define VMCI_UTIL_NUM_RESOURCES …

enum { … };

enum { … };

/*
 * VMCI driver initialization. This block can also be used to
 * pass initial group membership etc.
 */
struct vmci_init_blk { … };

/* VMCIqueue_pairAllocInfo_VMToVM */
struct vmci_qp_alloc_info_vmvm { … };

/* VMCISetNotifyInfo: Used to pass notify flag's address to the host driver. */
struct vmci_set_notify_info { … };

/*
 * Per-instance host state
 */
struct vmci_host_dev { … };

static struct vmci_ctx *host_context;
static bool vmci_host_device_initialized;
static atomic_t vmci_host_active_users = …;

/*
 * Determines whether the VMCI host personality is
 * available. Since the core functionality of the host driver is
 * always present, all guests could possibly use the host
 * personality. However, to minimize the deviation from the
 * pre-unified driver state of affairs, we only consider the host
 * device active if there is no active guest device or if there
 * are VMX'en with active VMCI contexts using the host device.
 */
bool vmci_host_code_active(void)
{ … }

int vmci_host_users(void)
{ … }

/*
 * Called on open of /dev/vmci.
 */
static int vmci_host_open(struct inode *inode, struct file *filp)
{ … }

/*
 * Called on close of /dev/vmci, most often when the process
 * exits.
 */
static int vmci_host_close(struct inode *inode, struct file *filp)
{ … }

/*
 * This is used to wake up the VMX when a VMCI call arrives, or
 * to wake up select() or poll() at the next clock tick.
 */
static __poll_t vmci_host_poll(struct file *filp, poll_table *wait)
{ … }

/*
 * Copies the handles of a handle array into a user buffer, and
 * returns the new length in userBufferSize. If the copy to the
 * user buffer fails, the functions still returns VMCI_SUCCESS,
 * but retval != 0.
 */
static int drv_cp_harray_to_user(void __user *user_buf_uva,
				 u64 *user_buf_size,
				 struct vmci_handle_arr *handle_array,
				 int *retval)
{ … }

/*
 * Sets up a given context for notify to work. Maps the notify
 * boolean in user VA into kernel space.
 */
static int vmci_host_setup_notify(struct vmci_ctx *context,
				  unsigned long uva)
{ … }

static int vmci_host_get_version(struct vmci_host_dev *vmci_host_dev,
				 unsigned int cmd, void __user *uptr)
{ … }

#define vmci_ioctl_err(fmt, ...) …

static int vmci_host_do_init_context(struct vmci_host_dev *vmci_host_dev,
				     const char *ioctl_name,
				     void __user *uptr)
{ … }

static int vmci_host_do_send_datagram(struct vmci_host_dev *vmci_host_dev,
				      const char *ioctl_name,
				      void __user *uptr)
{ … }

static int vmci_host_do_receive_datagram(struct vmci_host_dev *vmci_host_dev,
					 const char *ioctl_name,
					 void __user *uptr)
{ … }

static int vmci_host_do_alloc_queuepair(struct vmci_host_dev *vmci_host_dev,
					const char *ioctl_name,
					void __user *uptr)
{ … }

static int vmci_host_do_queuepair_setva(struct vmci_host_dev *vmci_host_dev,
					const char *ioctl_name,
					void __user *uptr)
{ … }

static int vmci_host_do_queuepair_setpf(struct vmci_host_dev *vmci_host_dev,
					const char *ioctl_name,
					void __user *uptr)
{ … }

static int vmci_host_do_qp_detach(struct vmci_host_dev *vmci_host_dev,
				  const char *ioctl_name,
				  void __user *uptr)
{ … }

static int vmci_host_do_ctx_add_notify(struct vmci_host_dev *vmci_host_dev,
				       const char *ioctl_name,
				       void __user *uptr)
{ … }

static int vmci_host_do_ctx_remove_notify(struct vmci_host_dev *vmci_host_dev,
					  const char *ioctl_name,
					  void __user *uptr)
{ … }

static int vmci_host_do_ctx_get_cpt_state(struct vmci_host_dev *vmci_host_dev,
					  const char *ioctl_name,
					  void __user *uptr)
{ … }

static int vmci_host_do_ctx_set_cpt_state(struct vmci_host_dev *vmci_host_dev,
					  const char *ioctl_name,
					  void __user *uptr)
{ … }

static int vmci_host_do_get_context_id(struct vmci_host_dev *vmci_host_dev,
				       const char *ioctl_name,
				       void __user *uptr)
{ … }

static int vmci_host_do_set_notify(struct vmci_host_dev *vmci_host_dev,
				   const char *ioctl_name,
				   void __user *uptr)
{ … }

static int vmci_host_do_notify_resource(struct vmci_host_dev *vmci_host_dev,
					const char *ioctl_name,
					void __user *uptr)
{ … }

static int vmci_host_do_recv_notifications(struct vmci_host_dev *vmci_host_dev,
					   const char *ioctl_name,
					   void __user *uptr)
{ … }

static long vmci_host_unlocked_ioctl(struct file *filp,
				     unsigned int iocmd, unsigned long ioarg)
{ … }

static const struct file_operations vmuser_fops = …;

static struct miscdevice vmci_host_miscdev = …;

int __init vmci_host_init(void)
{ … }

void __exit vmci_host_exit(void)
{ … }
linux/drivers/misc/vmw_vmci/vmci_host.c
