4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2012, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
37 #define DEBUG_SUBSYSTEM S_LNET
39 #include <linux/libcfs/libcfs.h>
40 #include <linux/libcfs/libcfs_crypto.h>
41 #include <linux/lnet/lib-lnet.h>
42 #include <linux/lnet/lnet.h>
43 #include "tracefile.h"
46 kportal_memhog_free (struct libcfs_device_userstate *ldu)
48 struct page **level0p = &ldu->ldu_memhog_root_page;
49 struct page **level1p;
50 struct page **level2p;
54 if (*level0p != NULL) {
56 level1p = (struct page **)page_address(*level0p);
59 while (count1 < PAGE_CACHE_SIZE/sizeof(struct page *) &&
62 level2p = (struct page **)page_address(*level1p);
65 while (count2 < PAGE_CACHE_SIZE/sizeof(struct page *) &&
68 __free_page(*level2p);
69 ldu->ldu_memhog_pages--;
74 __free_page(*level1p);
75 ldu->ldu_memhog_pages--;
80 __free_page(*level0p);
81 ldu->ldu_memhog_pages--;
86 LASSERT (ldu->ldu_memhog_pages == 0);
90 kportal_memhog_alloc (struct libcfs_device_userstate *ldu, int npages, int flags)
92 struct page **level0p;
93 struct page **level1p;
94 struct page **level2p;
98 LASSERT (ldu->ldu_memhog_pages == 0);
99 LASSERT (ldu->ldu_memhog_root_page == NULL);
107 level0p = &ldu->ldu_memhog_root_page;
108 *level0p = alloc_page(flags);
109 if (*level0p == NULL)
111 ldu->ldu_memhog_pages++;
113 level1p = (struct page **)page_address(*level0p);
115 memset(level1p, 0, PAGE_CACHE_SIZE);
117 while (ldu->ldu_memhog_pages < npages &&
118 count1 < PAGE_CACHE_SIZE/sizeof(struct page *)) {
120 if (cfs_signal_pending())
123 *level1p = alloc_page(flags);
124 if (*level1p == NULL)
126 ldu->ldu_memhog_pages++;
128 level2p = (struct page **)page_address(*level1p);
130 memset(level2p, 0, PAGE_CACHE_SIZE);
132 while (ldu->ldu_memhog_pages < npages &&
133 count2 < PAGE_CACHE_SIZE/sizeof(struct page *)) {
135 if (cfs_signal_pending())
138 *level2p = alloc_page(flags);
139 if (*level2p == NULL)
141 ldu->ldu_memhog_pages++;
154 /* called when opening /dev/device */
155 static int libcfs_psdev_open(unsigned long flags, void *args)
157 struct libcfs_device_userstate *ldu;
160 try_module_get(THIS_MODULE);
162 LIBCFS_ALLOC(ldu, sizeof(*ldu));
164 ldu->ldu_memhog_pages = 0;
165 ldu->ldu_memhog_root_page = NULL;
167 *(struct libcfs_device_userstate **)args = ldu;
172 /* called when closing /dev/device */
173 static int libcfs_psdev_release(unsigned long flags, void *args)
175 struct libcfs_device_userstate *ldu;
178 ldu = (struct libcfs_device_userstate *)args;
180 kportal_memhog_free(ldu);
181 LIBCFS_FREE(ldu, sizeof(*ldu));
184 module_put(THIS_MODULE);
188 static struct rw_semaphore ioctl_list_sem;
189 static struct list_head ioctl_list;
191 int libcfs_register_ioctl(struct libcfs_ioctl_handler *hand)
195 down_write(&ioctl_list_sem);
196 if (!list_empty(&hand->item))
199 list_add_tail(&hand->item, &ioctl_list);
200 up_write(&ioctl_list_sem);
204 EXPORT_SYMBOL(libcfs_register_ioctl);
206 int libcfs_deregister_ioctl(struct libcfs_ioctl_handler *hand)
210 down_write(&ioctl_list_sem);
211 if (list_empty(&hand->item))
214 list_del_init(&hand->item);
215 up_write(&ioctl_list_sem);
219 EXPORT_SYMBOL(libcfs_deregister_ioctl);
221 static int libcfs_ioctl_int(struct cfs_psdev_file *pfile,unsigned long cmd,
222 void *arg, struct libcfs_ioctl_data *data)
228 case IOC_LIBCFS_CLEAR_DEBUG:
229 libcfs_debug_clear_buffer();
232 * case IOC_LIBCFS_PANIC:
233 * Handled in arch/cfs_module.c
235 case IOC_LIBCFS_MARK_DEBUG:
236 if (data->ioc_inlbuf1 == NULL ||
237 data->ioc_inlbuf1[data->ioc_inllen1 - 1] != '\0')
239 libcfs_debug_mark_buffer(data->ioc_inlbuf1);
242 case IOC_LIBCFS_LWT_CONTROL:
243 err = lwt_control ((data->ioc_flags & 1) != 0,
244 (data->ioc_flags & 2) != 0);
247 case IOC_LIBCFS_LWT_SNAPSHOT: {
252 err = lwt_snapshot (&now, &ncpu, &total_size,
253 data->ioc_pbuf1, data->ioc_plen1);
254 data->ioc_u64[0] = now;
255 data->ioc_u32[0] = ncpu;
256 data->ioc_u32[1] = total_size;
258 /* Hedge against broken user/kernel typedefs (e.g. cycles_t) */
259 data->ioc_u32[2] = sizeof(lwt_event_t);
260 data->ioc_u32[3] = offsetof(lwt_event_t, lwte_where);
263 libcfs_ioctl_popdata(arg, data, sizeof (*data)))
268 case IOC_LIBCFS_LWT_LOOKUP_STRING:
269 err = lwt_lookup_string (&data->ioc_count, data->ioc_pbuf1,
270 data->ioc_pbuf2, data->ioc_plen2);
272 libcfs_ioctl_popdata(arg, data, sizeof (*data)))
276 case IOC_LIBCFS_MEMHOG:
277 if (pfile->private_data == NULL) {
280 kportal_memhog_free(pfile->private_data);
281 /* XXX The ioc_flags is not GFP flags now, need to be fixed */
282 err = kportal_memhog_alloc(pfile->private_data,
286 kportal_memhog_free(pfile->private_data);
290 case IOC_LIBCFS_PING_TEST: {
291 extern void (kping_client)(struct libcfs_ioctl_data *);
292 void (*ping)(struct libcfs_ioctl_data *);
294 CDEBUG(D_IOCTL, "doing %d pings to nid %s (%s)\n",
295 data->ioc_count, libcfs_nid2str(data->ioc_nid),
296 libcfs_nid2str(data->ioc_nid));
297 ping = symbol_get(kping_client);
299 CERROR("symbol_get failed\n");
302 symbol_put(kping_client);
308 struct libcfs_ioctl_handler *hand;
310 down_read(&ioctl_list_sem);
311 list_for_each_entry(hand, &ioctl_list, item) {
312 err = hand->handle_ioctl(cmd, data);
313 if (err != -EINVAL) {
315 err = libcfs_ioctl_popdata(arg,
316 data, sizeof (*data));
320 up_read(&ioctl_list_sem);
328 static int libcfs_ioctl(struct cfs_psdev_file *pfile, unsigned long cmd, void *arg)
331 struct libcfs_ioctl_data *data;
335 LIBCFS_ALLOC_GFP(buf, 1024, GFP_IOFS);
339 /* 'cmd' and permissions get checked in our arch-specific caller */
340 if (libcfs_ioctl_getdata(buf, buf + 800, (void *)arg)) {
341 CERROR("PORTALS ioctl: data error\n");
342 GOTO(out, err = -EINVAL);
344 data = (struct libcfs_ioctl_data *)buf;
346 err = libcfs_ioctl_int(pfile, cmd, arg, data);
349 LIBCFS_FREE(buf, 1024);
354 struct cfs_psdev_ops libcfs_psdev_ops = {
356 libcfs_psdev_release,
362 extern int insert_proc(void);
363 extern void remove_proc(void);
364 MODULE_AUTHOR("Peter J. Braam <braam@clusterfs.com>");
365 MODULE_DESCRIPTION("Portals v3.1");
366 MODULE_LICENSE("GPL");
368 extern psdev_t libcfs_dev;
369 extern struct rw_semaphore cfs_tracefile_sem;
370 extern struct mutex cfs_trace_thread_mutex;
371 extern struct cfs_wi_sched *cfs_sched_rehash;
373 extern void libcfs_init_nidstrings(void);
374 extern int libcfs_arch_init(void);
375 extern void libcfs_arch_cleanup(void);
377 static int init_libcfs_module(void)
382 libcfs_init_nidstrings();
383 init_rwsem(&cfs_tracefile_sem);
384 mutex_init(&cfs_trace_thread_mutex);
385 init_rwsem(&ioctl_list_sem);
386 INIT_LIST_HEAD(&ioctl_list);
387 init_waitqueue_head(&cfs_race_waitq);
389 rc = libcfs_debug_init(5 * 1024 * 1024);
391 printk(KERN_ERR "LustreError: libcfs_debug_init: %d\n", rc);
402 CERROR("lwt_init: error %d\n", rc);
406 rc = misc_register(&libcfs_dev);
408 CERROR("misc_register: error %d\n", rc);
412 rc = cfs_wi_startup();
414 CERROR("initialize workitem: error %d\n", rc);
415 goto cleanup_deregister;
418 /* max to 4 threads, should be enough for rehash */
419 rc = min(cfs_cpt_weight(cfs_cpt_table, CFS_CPT_ANY), 4);
420 rc = cfs_wi_sched_create("cfs_rh", cfs_cpt_table, CFS_CPT_ANY,
421 rc, &cfs_sched_rehash);
423 CERROR("Startup workitem scheduler: error: %d\n", rc);
424 goto cleanup_deregister;
427 rc = cfs_crypto_register();
429 CERROR("cfs_crypto_regster: error %d\n", rc);
436 CERROR("insert_proc: error %d\n", rc);
440 CDEBUG (D_OTHER, "portals setup OK\n");
443 cfs_crypto_unregister();
447 misc_deregister(&libcfs_dev);
453 libcfs_debug_cleanup();
457 static void exit_libcfs_module(void)
463 CDEBUG(D_MALLOC, "before Portals cleanup: kmem %d\n",
464 atomic_read(&libcfs_kmemory));
466 if (cfs_sched_rehash != NULL) {
467 cfs_wi_sched_destroy(cfs_sched_rehash);
468 cfs_sched_rehash = NULL;
471 cfs_crypto_unregister();
474 rc = misc_deregister(&libcfs_dev);
476 CERROR("misc_deregister error %d\n", rc);
483 if (atomic_read(&libcfs_kmemory) != 0)
484 CERROR("Portals memory leaked: %d bytes\n",
485 atomic_read(&libcfs_kmemory));
487 rc = libcfs_debug_cleanup();
489 printk(KERN_ERR "LustreError: libcfs_debug_cleanup: %d\n",
492 fini_rwsem(&ioctl_list_sem);
493 fini_rwsem(&cfs_tracefile_sem);
495 libcfs_arch_cleanup();
498 cfs_module(libcfs, "1.0.0", init_libcfs_module, exit_libcfs_module);