void
lwt_fini ()
{
int i;
lwt_control(0, 0);
for (i = 0; i < cfs_num_online_cpus(); i++)
while (lwt_cpus[i].lwtc_current_page != NULL) {
lwt_page_t *lwtp = lwt_cpus[i].lwtc_current_page;
if (cfs_list_empty (&lwtp->lwtp_list)) {
lwt_cpus[i].lwtc_current_page = NULL;
} else {
lwt_cpus[i].lwtc_current_page =
cfs_list_entry (lwtp->lwtp_list.next,
lwt_page_t, lwtp_list);
cfs_list_del (&lwtp->lwtp_list);
}
__free_page (lwtp->lwtp_page);
LIBCFS_FREE (lwtp, sizeof (*lwtp));
}
}
static int libcfs_ioctl_int(struct cfs_psdev_file *pfile,unsigned long cmd,
void *arg, struct libcfs_ioctl_data *data)
{
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 = 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);
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);
}
