linux_module/palacios-vm.c

   1 /*
   2  * VM specific Controls
   3  * (c) Jack Lange, 2010
   4  */
   5
   6 #include <linux/device.h>
   7 #include <linux/cdev.h>
   8 #include <linux/errno.h>
   9 #include <linux/percpu.h>
  10 #include <linux/fs.h>
  11 #include <linux/uaccess.h>
  12 #include <linux/poll.h>
  13 #include <linux/anon_inodes.h>
  14 #include <linux/sched.h>
  15
  16 #include <linux/smp_lock.h>
  17 #include <linux/file.h>
  18 #include <linux/spinlock.h>
  19
  20
  21 #include <palacios/vmm.h>
  22
  23 #include "palacios.h"
  24 #include "palacios-vm.h"
  25
  26 #ifdef V3_CONFIG_STREAM
  27 #include "palacios-stream.h"
  28 #endif
  29
  30 #ifdef V3_CONFIG_CONSOLE
  31 #include "palacios-console.h"
  32 #endif
  33
  34 #ifdef V3_CONFIG_EXT_INSPECTOR
  35 #include "palacios-inspector.h"
  36 #endif
  37
  38
  39 extern struct class * v3_class;
  40 #define STREAM_NAME_LEN 128
  41
  42 static long v3_vm_ioctl(struct file * filp,
  43                         unsigned int ioctl, unsigned long arg) {
  44
  45     struct v3_guest * guest = filp->private_data;
  46
  47     printk("V3 IOCTL %d\n", ioctl);
  48
  49     switch (ioctl) {
  50
  51         case V3_VM_STOP: {
  52             printk("Stopping VM\n");
  53             stop_palacios_vm(guest);
  54             break;
  55         }
  56
  57         case V3_VM_CONSOLE_CONNECT: {
  58 #ifdef V3_CONFIG_CONSOLE
  59             return connect_console(guest);
  60 #else
  61             printk("Console support not available\n");
  62             return -EFAULT;
  63 #endif
  64             break;
  65         }
  66
  67         case V3_VM_STREAM_CONNECT: {
  68 #ifdef V3_CONFIG_STREAM
  69             void __user * argp = (void __user *)arg;
  70             char path_name[STREAM_NAME_LEN];
  71
  72             if (copy_from_user(path_name, argp, STREAM_NAME_LEN)) {
  73                 printk("%s(%d): copy from user error...\n", __FILE__, __LINE__);
  74                 return -EFAULT;
  75             }
  76
  77             return open_stream(path_name);
  78 #else
  79             printk("Stream support Not available\n");
  80             return -EFAULT;
  81 #endif
  82             break;
  83         }
  84
  85         default:
  86             printk("\tUnhandled\n");
  87             return -EINVAL;
  88     }
  89
  90     return 0;
  91 }
  92
  93 static int v3_vm_open(struct inode * inode, struct file * filp) {
  94     struct v3_guest * guest = container_of(inode->i_cdev, struct v3_guest, cdev);
  95     filp->private_data = guest;
  96     return 0;
  97 }
  98
  99
 100 static ssize_t v3_vm_read(struct file * filp, char __user * buf, size_t size, loff_t * offset) {
 101
 102     return 0;
 103 }
 104
 105
 106 static ssize_t v3_vm_write(struct file * filp, const char __user * buf, size_t size, loff_t * offset) {
 107
 108     return 0;
 109 }
 110
 111
 112 static struct file_operations v3_vm_fops = {
 113     .owner = THIS_MODULE,
 114     .unlocked_ioctl = v3_vm_ioctl,
 115     .compat_ioctl = v3_vm_ioctl,
 116     .open = v3_vm_open,
 117     .read = v3_vm_read,
 118     .write = v3_vm_write,
 119 };
 120
 121
 122 extern int vm_running;
 123 extern u32 pg_allocs;
 124 extern u32 pg_frees;
 125 extern u32 mallocs;
 126 extern u32 frees;
 127
 128 int start_palacios_vm(void * arg)  {
 129     struct v3_guest * guest = (struct v3_guest *)arg;
 130     int err;
 131
 132     lock_kernel();
 133     daemonize(guest->name);
 134     // allow_signal(SIGKILL);
 135     unlock_kernel();
 136
 137
 138     guest->v3_ctx = v3_create_vm(guest->img, (void *)guest, guest->name);
 139
 140     if (guest->v3_ctx == NULL) {
 141         printk("palacios: failed to create vm\n");
 142         complete(&(guest->start_done));
 143         return -1;
 144     }
 145
 146     printk("Creating VM device: Major %d, Minor %d\n", MAJOR(guest->vm_dev), MINOR(guest->vm_dev));
 147
 148     cdev_init(&(guest->cdev), &v3_vm_fops);
 149
 150     guest->cdev.owner = THIS_MODULE;
 151     guest->cdev.ops = &v3_vm_fops;
 152
 153
 154     printk("Adding VM device\n");
 155     err = cdev_add(&(guest->cdev), guest->vm_dev, 1);
 156
 157     if (err) {
 158         printk("Fails to add cdev\n");
 159         v3_free_vm(guest->v3_ctx);
 160         complete(&(guest->start_done));
 161         return -1;
 162     }
 163
 164     if (device_create(v3_class, NULL, guest->vm_dev, guest, "v3-vm%d", MINOR(guest->vm_dev)) == NULL){
 165         printk("Fails to create device\n");
 166         cdev_del(&(guest->cdev));
 167         v3_free_vm(guest->v3_ctx);
 168         complete(&(guest->start_done));
 169         return -1;
 170     }
 171
 172     complete(&(guest->start_done));
 173
 174     printk("palacios: launching vm\n");
 175
 176
 177 #if V3_CONFIG_EXT_INSPECTOR
 178     inspect_vm(guest);
 179 #endif
 180
 181
 182     if (v3_start_vm(guest->v3_ctx, 0xffffffff) < 0) {
 183         printk("palacios: launch of vm failed\n");
 184         device_destroy(v3_class, guest->vm_dev);
 185         cdev_del(&(guest->cdev));
 186         v3_free_vm(guest->v3_ctx);
 187         return -1;
 188     }
 189
 190     complete(&(guest->thread_done));
 191
 192     printk("palacios: vm completed.  returning.\n");
 193
 194     return 0;
 195 }
 196
 197
 198
 199
 200 int stop_palacios_vm(struct v3_guest * guest) {
 201
 202     v3_stop_vm(guest->v3_ctx);
 203
 204     wait_for_completion(&(guest->thread_done));
 205
 206     v3_free_vm(guest->v3_ctx);
 207
 208     device_destroy(v3_class, guest->vm_dev);
 209
 210     cdev_del(&(guest->cdev));
 211
 212     kfree(guest->img);
 213     kfree(guest);
 214
 215     return 0;
 216 }