- 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;
- 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;
- }
- }
- up_read(&ioctl_list_sem);
- break;
- }
- }
-
- RETURN(err);
-}
-
-static int libcfs_ioctl(struct cfs_psdev_file *pfile, unsigned long cmd, void *arg)
-{
- char *buf;
- struct libcfs_ioctl_data *data;
- int err = 0;
- ENTRY;
-
- LIBCFS_ALLOC_GFP(buf, 1024, CFS_ALLOC_STD);
- if (buf == NULL)
- RETURN(-ENOMEM);
-
- /* 'cmd' and permissions get checked in our arch-specific caller */
- if (libcfs_ioctl_getdata(buf, buf + 800, (void *)arg)) {
- CERROR("PORTALS ioctl: data error\n");
- GOTO(out, err = -EINVAL);
- }
- data = (struct libcfs_ioctl_data *)buf;