int
bdevsw_module_handler(module_t mod, int what, void* arg)
{
struct bdevsw_module_data* data = (struct bdevsw_module_data*) arg;
int error;
switch (what) {
case MOD_LOAD:
error = cdevsw_add(&data->cdev, data->cdevsw, NULL);
if (!error)
error = bdevsw_add(&data->bdev, data->cdevsw, NULL);
if (!error && data->chainevh)
error = data->chainevh(mod, what, data->chainarg);
return error;
case MOD_UNLOAD:
if (data->chainevh) {
error = data->chainevh(mod, what, data->chainarg);
if (error)
return error;
}
error = bdevsw_add(&data->bdev, NULL, NULL);
if (!error)
error = cdevsw_add(&data->cdev, NULL, NULL);
return error;
}
if (data->chainevh)
return data->chainevh(mod, what, data->chainarg);
else
return 0;
}
static void
vndevice_do_init( void )
{
int i;
vndevice_bdev_major = bdevsw_add(BDEV_MAJOR, &vn_bdevsw);
if (vndevice_bdev_major < 0) {
printf("vndevice_init: bdevsw_add() returned %d\n",
vndevice_bdev_major);
return;
}
vndevice_cdev_major = cdevsw_add_with_bdev(CDEV_MAJOR, &vn_cdevsw,
vndevice_bdev_major);
if (vndevice_cdev_major < 0) {
printf("vndevice_init: cdevsw_add() returned %d\n",
vndevice_cdev_major);
return;
}
for (i = 0; i < NVNDEVICE; i++) {
dev_t dev = makedev(vndevice_bdev_major, i);
vn_table[i].sc_bdev = devfs_make_node(dev, DEVFS_BLOCK,
UID_ROOT, GID_OPERATOR,
0600, "vn%d",
i);
if (vn_table[i].sc_bdev == NULL)
printf("vninit: devfs_make_node failed!\n");
}
}
/*
* note must call cdevsw_add before bdevsw_add due to d_bmaj hack.
*/
void
cdevsw_add_generic(int bdev, int cdev, struct cdevsw *cdevsw)
{
dev_t dev;
dev = makedev(cdev, 0);
cdevsw_add(&dev, cdevsw, NULL);
dev = makedev(bdev, 0);
bdevsw_add(&dev, cdevsw, NULL);
}
