- int err = -EINVAL;
- ENTRY;
-
- switch (cmd) {
- case IOC_LIBCFS_CLEAR_DEBUG:
- libcfs_debug_clear_buffer();
- RETURN(0);
- /*
- * case IOC_LIBCFS_PANIC:
- * Handled in arch/cfs_module.c
- */
- case IOC_LIBCFS_MARK_DEBUG:
- if (data->ioc_inlbuf1 == NULL ||
- data->ioc_inlbuf1[data->ioc_inllen1 - 1] != '\0')
- RETURN(-EINVAL);
- libcfs_debug_mark_buffer(data->ioc_inlbuf1);
- RETURN(0);
- case IOC_LIBCFS_MEMHOG:
- if (pfile->private_data == NULL) {
- err = -EINVAL;
- } else {
- kportal_memhog_free(pfile->private_data);
- /* XXX The ioc_flags is not GFP flags now, need to be fixed */
- err = kportal_memhog_alloc(pfile->private_data,
- data->ioc_count,
- data->ioc_flags);
- if (err != 0)
- kportal_memhog_free(pfile->private_data);
- }
- break;
-
- case IOC_LIBCFS_PING_TEST: {
- extern void (kping_client)(struct libcfs_ioctl_data *);
- void (*ping)(struct libcfs_ioctl_data *);
-
- CDEBUG(D_IOCTL, "doing %d pings to nid %s (%s)\n",
- data->ioc_count, libcfs_nid2str(data->ioc_nid),
- libcfs_nid2str(data->ioc_nid));
- ping = symbol_get(kping_client);
- if (!ping) {
- CERROR("symbol_get failed\n");
- } else {
- ping(data);
- symbol_put(kping_client);
- }
- RETURN(0);
+ struct libcfs_ioctl_data *data = NULL;
+ struct libcfs_ioctl_hdr *hdr;
+ int err;
+ ENTRY;
+
+ /* 'cmd' and permissions get checked in our arch-specific caller */
+ err = libcfs_ioctl_getdata(&hdr, uparam);
+ if (err != 0) {
+ CDEBUG_LIMIT(D_ERROR,
+ "libcfs ioctl: data header error %d\n", err);
+ RETURN(err);