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
);