[Xen-devel] creating vif and vbd devices

[exdiff@xxxxxxxxx]

Hi,

How can I create vbd and vif devices?
This code does'nt work.

void setup_vbd(struct xs_handle *xs, uint32_t domid, struct vbd* vbd) {

  char s[256];
  char s2[256];
  char pdev[8];
  char vdev[8];
  char backend[256];
  char frontend[256];
  char node[16];
  xs_transaction_t trans;
  
  struct xs_permissions xsperms[2];
  char* home = xs_get_domain_path(xs,domid);
  char* dom0_home = xs_get_domain_path(xs,0);

  xsperms[0].id = domid;
  xsperms[0].perms = XS_PERM_READ | XS_PERM_WRITE;
  
  sprintf( pdev,"%u:%u",vbd->pdev>>8, vbd->pdev & 0xff );
  
  sprintf( backend,"%s/backend/vbd/%d/%d",dom0_home,domid,vbd->vdev );
  sprintf( frontend, "%s/device/vbd/%d",home,vbd->vdev );
  
  trans = xs_transaction_start( xs );
  xs_mkdir( xs, trans, backend );
  xs_set_permissions( xs, trans, backend, xsperms, 1 );
  
  sprintf( s,"%s/backend",frontend );
  xs_write( xs, trans, s, backend, strlen(backend) );
  
  sprintf( s, "%s/backend-id", frontend );
  xs_write( xs, trans, s, "0", 1);
  
  sprintf( s, "%s/state", frontend );
  xs_write( xs, trans, s, "1", 1);
  
  
  sprintf( s, "%s/virtual-device", frontend );
  sprintf( vdev,"%u",vbd->vdev );
  xs_write( xs, trans, s, vdev, strlen(vdev) );
  
  
  sprintf( s,"%s/domain",backend );
  sprintf( s2,"%d",domid );
  xs_write( xs, trans, s, s2, strlen(s2) );
  
  sprintf( s,"%s/frontend",backend );
  xs_write( xs, trans, s, frontend, strlen(frontend) );
  
  sprintf( s,"%s/frontend-id",backend );
  sprintf( s2,"%d",domid );
  xs_write( xs, trans, s, s2, strlen(s2) );
  
  sprintf( s, "%s/state", backend );
  xs_write( xs, trans, s, "1", 1 );
  
  sprintf( s, "%s/physical-device",backend );
  xs_write( xs, trans, s, pdev, strlen(pdev) );
  
  sprintf( s, "%s/mode",backend );
  xs_write( xs, trans, s, vbd->mode, strlen(vbd->mode));
  
  sprintf( node,"/dev/hda%d",vbd->vdev-0x300 );
  
  xs_transaction_end( xs, trans, 0 );

  return;
}

void setup_vif(struct xs_handle *xs, uint32_t domid, int uuid ) {
  char s[256];
  char s2[256];
  struct xs_permissions xsperms[2];
  
  char* home = xs_get_domain_path(xs,domid);
  char* dom0_home = xs_get_domain_path(xs,0);
  
  char backend[256];
  char frontend[256];

  xs_transaction_t trans;
  
  xsperms[0].id = domid;
  xsperms[0].perms = XS_PERM_READ | XS_PERM_WRITE;
  
  sprintf(backend,"%s/backend/vif/%d/%d",dom0_home,domid,uuid);
  sprintf(frontend, "%s/device/vif/%d",home,uuid);
  

  trans = xs_transaction_start( xs );
  xs_mkdir( xs, trans, backend );
  xs_set_permissions( xs, trans, backend, xsperms, 1 );
  
  sprintf(s,"%s/handle",frontend);
  sprintf(s2,"%d",uuid);
  xs_write( xs, trans, s, s2, strlen(s2) );

  sprintf( s,"%s/mac",frontend );
  xs_write( xs, trans, s, "aa:00:00:11:a6:02", 17 );

  sprintf(s, "%s/backend-id", frontend);
  xs_write( xs, trans, s, "0", 1 );
        
  sprintf( s,"%s/backend",frontend );
  xs_write( xs, trans, s, backend, strlen(backend) );

  sprintf( s, "%s/state", frontend );
  xs_write( xs, trans, s, "1", 1);

  sprintf( s,"%s/handle",backend );
  sprintf( s2,"%d",uuid );
  xs_write( xs, trans, s, s2, strlen(s2) );
        
  sprintf( s,"%s/mac",backend );
  xs_write( xs, trans, s, "aa:00:00:11:a6:02", 17 );

  sprintf( s,"%s/script",backend );
  xs_write( xs, trans, s, "/bin/test", 9 );

  sprintf( s,"%s/frontend", backend );
  xs_write( xs, trans, s, frontend, strlen(frontend) );

  sprintf( s,"%s/frontend-id",backend );
  sprintf( s2,"%d",domid );
  xs_write( xs, trans, s, s2, strlen(s2) );

  sprintf( s, "%s/state", backend );
  xs_write( xs, trans, s, "1", 1 );

  sprintf( s, "%s/handle", backend );
  sprintf( s2,"%d",uuid );
  xs_write( xs, trans, s, s2, strlen(s2) );

  //sprintf(s, "%s/online", backend);
  //xs_w(s, "1");

  xs_transaction_end( xs, trans, 0 );
  return;
}


-- 
Dmitry Fedotov <exdiff@xxxxxxxxx>

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