- 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);
-#if LWT_SUPPORT
- case IOC_LIBCFS_LWT_CONTROL:
- err = lwt_control ((data->ioc_flags & 1) != 0,
- (data->ioc_flags & 2) != 0);
- break;
-
- case IOC_LIBCFS_LWT_SNAPSHOT: {
- cfs_cycles_t now;
- int ncpu;
- int total_size;
-
- err = lwt_snapshot (&now, &ncpu, &total_size,
- data->ioc_pbuf1, data->ioc_plen1);
- data->ioc_u64[0] = now;
- data->ioc_u32[0] = ncpu;
- data->ioc_u32[1] = total_size;
-
- /* Hedge against broken user/kernel typedefs (e.g. cycles_t) */
- data->ioc_u32[2] = sizeof(lwt_event_t);
- data->ioc_u32[3] = offsetof(lwt_event_t, lwte_where);
-
- if (err == 0 &&
- libcfs_ioctl_popdata(arg, data, sizeof (*data)))
- err = -EFAULT;
- break;
- }
-
- case IOC_LIBCFS_LWT_LOOKUP_STRING:
- err = lwt_lookup_string (&data->ioc_count, data->ioc_pbuf1,
- data->ioc_pbuf2, data->ioc_plen2);
- if (err == 0 &&
- libcfs_ioctl_popdata(arg, data, sizeof (*data)))
- err = -EFAULT;
- break;
-#endif
- 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 = PORTAL_SYMBOL_GET(kping_client);
- if (!ping)
- CERROR("PORTAL_SYMBOL_GET failed\n");
- else {
- ping(data);
- PORTAL_SYMBOL_PUT(kping_client);
- }
- RETURN(0);
- }
-
- default: {
- struct libcfs_ioctl_handler *hand;
- err = -EINVAL;
- cfs_down_read(&ioctl_list_sem);
- cfs_list_for_each_entry_typed(hand, &ioctl_list,
- struct libcfs_ioctl_handler, item) {
- err = hand->handle_ioctl(cmd, data);
- if (err != -EINVAL) {
- if (err == 0)
- err = libcfs_ioctl_popdata(arg,
- data, sizeof (*data));
- break;
- }
- }
- cfs_up_read(&ioctl_list_sem);
- break;
- }
- }
-
- RETURN(err);
+ struct libcfs_ioctl_data *data = NULL;
+ int err;
+ ENTRY;
+
+ /* 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 != 0) {
+ RETURN(err);
+ }
+ }
+
+ 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);
+ }
+
+ default: {
+ struct libcfs_ioctl_handler *hand;
+
+ err = -EINVAL;
+ down_read(&ioctl_list_sem);
+ list_for_each_entry(hand, &ioctl_list, item) {
+ err = hand->handle_ioctl(cmd, hdr);
+ if (err != -EINVAL) {
+ if (err == 0)
+ err = libcfs_ioctl_popdata(arg,
+ hdr, hdr->ioc_len);
+ break;
+ }
+ }
+ up_read(&ioctl_list_sem);
+ break;
+ }
+ }
+
+ RETURN(err);