int libcfs_ioctl(unsigned long cmd, void __user *uparam)
{
struct libcfs_ioctl_data *data = NULL;
struct libcfs_ioctl_hdr *hdr;
int err;
/* 'cmd' and permissions get checked in our arch-specific caller */
err = libcfs_ioctl_getdata(&hdr, uparam);
if (err) {
CDEBUG_LIMIT(D_ERROR,
"libcfs ioctl: data header error %d\n", err);
return err;
}
if (hdr->ioc_version == LIBCFS_IOCTL_VERSION) {
/*
* The libcfs_ioctl_data_adjust() function performs adjustment
* operations on the libcfs_ioctl_data structure to make
* it usable by the code. This doesn't need to be called
* for new data structures added.
*/
data = container_of(hdr, struct libcfs_ioctl_data, ioc_hdr);
err = libcfs_ioctl_data_adjust(data);
if (err)
goto out;
}
static int libcfs_ioctl_handle(struct cfs_psdev_file *pfile, unsigned long cmd,
void __user *arg, struct libcfs_ioctl_hdr *hdr)
{
struct libcfs_ioctl_data *data = NULL;
int err = -EINVAL;
/*
* The libcfs_ioctl_data_adjust() function performs adjustment
* operations on the libcfs_ioctl_data structure to make
* it usable by the code. This doesn't need to be called
* for new data structures added.
*/
if (hdr->ioc_version == LIBCFS_IOCTL_VERSION) {
data = container_of(hdr, struct libcfs_ioctl_data, ioc_hdr);
err = libcfs_ioctl_data_adjust(data);
if (err)
return err;
}