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LU-7898 osd: remove unnecessary declarations
[fs/lustre-release.git] / lustre / obdclass / class_obd.c
1 /*
2  * GPL HEADER START
3  *
4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5  *
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.
9  *
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).
15  *
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
19  *
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
22  * have any questions.
23  *
24  * GPL HEADER END
25  */
26 /*
27  * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
28  * Use is subject to license terms.
29  *
30  * Copyright (c) 2011, 2015, Intel Corporation.
31  */
32 /*
33  * This file is part of Lustre, http://www.lustre.org/
34  * Lustre is a trademark of Sun Microsystems, Inc.
35  */
36
37 #define DEBUG_SUBSYSTEM S_CLASS
38
39 #include <linux/user_namespace.h>
40 #ifdef HAVE_UIDGID_HEADER
41 # include <linux/uidgid.h>
42 #endif
43 #include <linux/atomic.h>
44 #include <linux/list.h>
45
46 #include <obd_support.h>
47 #include <obd_class.h>
48 #include <lnet/lnetctl.h>
49 #include <lustre_debug.h>
50 #include <lprocfs_status.h>
51 #include <lustre_ver.h>
52 #include <cl_object.h>
53 #ifdef HAVE_SERVER_SUPPORT
54 # include <dt_object.h>
55 # include <md_object.h>
56 #endif /* HAVE_SERVER_SUPPORT */
57 #include <lustre_ioctl.h>
58 #include "llog_internal.h"
59
60 struct obd_device *obd_devs[MAX_OBD_DEVICES];
61 struct list_head obd_types;
62 DEFINE_RWLOCK(obd_dev_lock);
63
64 #ifdef CONFIG_PROC_FS
65 static __u64 obd_max_alloc;
66 #else
67 __u64 obd_max_alloc;
68 #endif
69
70 static DEFINE_SPINLOCK(obd_updatemax_lock);
71
72 /* The following are visible and mutable through /proc/sys/lustre/. */
73 unsigned int obd_debug_peer_on_timeout;
74 EXPORT_SYMBOL(obd_debug_peer_on_timeout);
75 unsigned int obd_dump_on_timeout;
76 EXPORT_SYMBOL(obd_dump_on_timeout);
77 unsigned int obd_dump_on_eviction;
78 EXPORT_SYMBOL(obd_dump_on_eviction);
79 unsigned long obd_max_dirty_pages;
80 EXPORT_SYMBOL(obd_max_dirty_pages);
81 atomic_long_t obd_dirty_pages;
82 EXPORT_SYMBOL(obd_dirty_pages);
83 unsigned int obd_timeout = OBD_TIMEOUT_DEFAULT;   /* seconds */
84 EXPORT_SYMBOL(obd_timeout);
85 unsigned int ldlm_timeout = LDLM_TIMEOUT_DEFAULT; /* seconds */
86 EXPORT_SYMBOL(ldlm_timeout);
87 unsigned int obd_timeout_set;
88 EXPORT_SYMBOL(obd_timeout_set);
89 unsigned int ldlm_timeout_set;
90 EXPORT_SYMBOL(ldlm_timeout_set);
91 /* bulk transfer timeout, give up after 100s by default */
92 unsigned int bulk_timeout = 100; /* seconds */
93 EXPORT_SYMBOL(bulk_timeout);
94 /* Adaptive timeout defs here instead of ptlrpc module for /proc/sys/ access */
95 unsigned int at_min = 0;
96 EXPORT_SYMBOL(at_min);
97 unsigned int at_max = 600;
98 EXPORT_SYMBOL(at_max);
99 unsigned int at_history = 600;
100 EXPORT_SYMBOL(at_history);
101 int at_early_margin = 5;
102 EXPORT_SYMBOL(at_early_margin);
103 int at_extra = 30;
104 EXPORT_SYMBOL(at_extra);
105
106 atomic_long_t obd_dirty_transit_pages;
107 EXPORT_SYMBOL(obd_dirty_transit_pages);
108
109 char obd_jobid_var[JOBSTATS_JOBID_VAR_MAX_LEN + 1] = JOBSTATS_DISABLE;
110
111 #ifdef CONFIG_PROC_FS
112 struct lprocfs_stats *obd_memory = NULL;
113 EXPORT_SYMBOL(obd_memory);
114 #endif
115
116 char obd_jobid_node[LUSTRE_JOBID_SIZE + 1];
117
118 /* Get jobid of current process by reading the environment variable
119  * stored in between the "env_start" & "env_end" of task struct.
120  *
121  * TODO:
122  * It's better to cache the jobid for later use if there is any
123  * efficient way, the cl_env code probably could be reused for this
124  * purpose.
125  *
126  * If some job scheduler doesn't store jobid in the "env_start/end",
127  * then an upcall could be issued here to get the jobid by utilizing
128  * the userspace tools/api. Then, the jobid must be cached.
129  */
130 int lustre_get_jobid(char *jobid)
131 {
132         int jobid_len = LUSTRE_JOBID_SIZE;
133         int rc = 0;
134         ENTRY;
135
136         memset(jobid, 0, LUSTRE_JOBID_SIZE);
137         /* Jobstats isn't enabled */
138         if (strcmp(obd_jobid_var, JOBSTATS_DISABLE) == 0)
139                 RETURN(0);
140
141         /* Whole node dedicated to single job */
142         if (strcmp(obd_jobid_var, JOBSTATS_NODELOCAL) == 0) {
143                 memcpy(jobid, obd_jobid_node, LUSTRE_JOBID_SIZE);
144                 RETURN(0);
145         }
146
147         /* Use process name + fsuid as jobid */
148         if (strcmp(obd_jobid_var, JOBSTATS_PROCNAME_UID) == 0) {
149                 snprintf(jobid, LUSTRE_JOBID_SIZE, "%s.%u",
150                          current_comm(),
151                          from_kuid(&init_user_ns, current_fsuid()));
152                 RETURN(0);
153         }
154
155         rc = cfs_get_environ(obd_jobid_var, jobid, &jobid_len);
156         if (rc) {
157                 if (rc == -EOVERFLOW) {
158                         /* For the PBS_JOBID and LOADL_STEP_ID keys (which are
159                          * variable length strings instead of just numbers), it
160                          * might make sense to keep the unique parts for JobID,
161                          * instead of just returning an error.  That means a
162                          * larger temp buffer for cfs_get_environ(), then
163                          * truncating the string at some separator to fit into
164                          * the specified jobid_len.  Fix later if needed. */
165                         static bool printed;
166                         if (unlikely(!printed)) {
167                                 LCONSOLE_ERROR_MSG(0x16b, "%s value too large "
168                                                    "for JobID buffer (%d)\n",
169                                                    obd_jobid_var, jobid_len);
170                                 printed = true;
171                         }
172                 } else {
173                         CDEBUG((rc == -ENOENT || rc == -EINVAL ||
174                                 rc == -EDEADLK) ? D_INFO : D_ERROR,
175                                "Get jobid for (%s) failed: rc = %d\n",
176                                obd_jobid_var, rc);
177                 }
178         }
179         RETURN(rc);
180 }
181 EXPORT_SYMBOL(lustre_get_jobid);
182
183 static int class_resolve_dev_name(__u32 len, const char *name)
184 {
185         int rc;
186         int dev;
187
188         ENTRY;
189         if (!len || !name) {
190                 CERROR("No name passed,!\n");
191                 GOTO(out, rc = -EINVAL);
192         }
193         if (name[len - 1] != 0) {
194                 CERROR("Name not nul terminated!\n");
195                 GOTO(out, rc = -EINVAL);
196         }
197
198         CDEBUG(D_IOCTL, "device name %s\n", name);
199         dev = class_name2dev(name);
200         if (dev == -1) {
201                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
202                 GOTO(out, rc = -EINVAL);
203         }
204
205         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
206         rc = dev;
207
208 out:
209         RETURN(rc);
210 }
211
212 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
213 {
214         char *buf = NULL;
215         struct obd_ioctl_data *data;
216         struct libcfs_debug_ioctl_data *debug_data;
217         struct obd_device *obd = NULL;
218         int err = 0, len = 0;
219         ENTRY;
220
221         /* only for debugging */
222         if (cmd == LIBCFS_IOC_DEBUG_MASK) {
223                 debug_data = (struct libcfs_debug_ioctl_data*)arg;
224                 libcfs_subsystem_debug = debug_data->subs;
225                 libcfs_debug = debug_data->debug;
226                 return 0;
227         }
228
229         CDEBUG(D_IOCTL, "cmd = %x\n", cmd);
230         if (obd_ioctl_getdata(&buf, &len, (void __user *)arg)) {
231                 CERROR("OBD ioctl: data error\n");
232                 RETURN(-EINVAL);
233         }
234         data = (struct obd_ioctl_data *)buf;
235
236         switch (cmd) {
237         case OBD_IOC_PROCESS_CFG: {
238                 struct lustre_cfg *lcfg;
239
240                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
241                         CERROR("No config buffer passed!\n");
242                         GOTO(out, err = -EINVAL);
243                 }
244                 OBD_ALLOC(lcfg, data->ioc_plen1);
245                 if (lcfg == NULL)
246                         GOTO(out, err = -ENOMEM);
247                 err = copy_from_user(lcfg, data->ioc_pbuf1,
248                                          data->ioc_plen1);
249                 if (!err)
250                         err = lustre_cfg_sanity_check(lcfg, data->ioc_plen1);
251                 if (!err)
252                         err = class_process_config(lcfg);
253
254                 OBD_FREE(lcfg, data->ioc_plen1);
255                 GOTO(out, err);
256         }
257
258         case OBD_GET_VERSION:
259                 if (!data->ioc_inlbuf1) {
260                         CERROR("No buffer passed in ioctl\n");
261                         GOTO(out, err = -EINVAL);
262                 }
263
264                 if (strlen(LUSTRE_VERSION_STRING) + 1 > data->ioc_inllen1) {
265                         CERROR("ioctl buffer too small to hold version\n");
266                         GOTO(out, err = -EINVAL);
267                 }
268
269                 memcpy(data->ioc_bulk, LUSTRE_VERSION_STRING,
270                        strlen(LUSTRE_VERSION_STRING) + 1);
271
272                 err = obd_ioctl_popdata((void __user *)arg, data, len);
273                 if (err)
274                         err = -EFAULT;
275                 GOTO(out, err);
276
277         case OBD_IOC_NAME2DEV: {
278                 /* Resolve a device name.  This does not change the
279                  * currently selected device.
280                  */
281                 int dev;
282
283                 dev = class_resolve_dev_name(data->ioc_inllen1,
284                                              data->ioc_inlbuf1);
285                 data->ioc_dev = dev;
286                 if (dev < 0)
287                         GOTO(out, err = -EINVAL);
288
289                 err = obd_ioctl_popdata((void __user *)arg, data,
290                                         sizeof(*data));
291                 if (err)
292                         err = -EFAULT;
293                 GOTO(out, err);
294         }
295
296         case OBD_IOC_UUID2DEV: {
297                 /* Resolve a device uuid.  This does not change the
298                  * currently selected device.
299                  */
300                 int dev;
301                 struct obd_uuid uuid;
302
303                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
304                         CERROR("No UUID passed!\n");
305                         GOTO(out, err = -EINVAL);
306                 }
307                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
308                         CERROR("UUID not NUL terminated!\n");
309                         GOTO(out, err = -EINVAL);
310                 }
311
312                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
313                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
314                 dev = class_uuid2dev(&uuid);
315                 data->ioc_dev = dev;
316                 if (dev == -1) {
317                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
318                                data->ioc_inlbuf1);
319                         GOTO(out, err = -EINVAL);
320                 }
321
322                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
323                        dev);
324                 err = obd_ioctl_popdata((void __user *)arg, data,
325                                         sizeof(*data));
326                 if (err)
327                         err = -EFAULT;
328                 GOTO(out, err);
329         }
330
331         case OBD_IOC_GETDEVICE: {
332                 int     index = data->ioc_count;
333                 char    *status, *str;
334
335                 if (!data->ioc_inlbuf1) {
336                         CERROR("No buffer passed in ioctl\n");
337                         GOTO(out, err = -EINVAL);
338                 }
339                 if (data->ioc_inllen1 < 128) {
340                         CERROR("ioctl buffer too small to hold version\n");
341                         GOTO(out, err = -EINVAL);
342                 }
343
344                 obd = class_num2obd(index);
345                 if (!obd)
346                         GOTO(out, err = -ENOENT);
347
348                 if (obd->obd_stopping)
349                         status = "ST";
350                 else if (obd->obd_set_up)
351                         status = "UP";
352                 else if (obd->obd_attached)
353                         status = "AT";
354                 else
355                         status = "--";
356                 str = (char *)data->ioc_bulk;
357                 snprintf(str, len - sizeof(*data), "%3d %s %s %s %s %d",
358                          (int)index, status, obd->obd_type->typ_name,
359                          obd->obd_name, obd->obd_uuid.uuid,
360                          atomic_read(&obd->obd_refcount));
361                 err = obd_ioctl_popdata((void __user *)arg, data, len);
362
363                 GOTO(out, err = 0);
364         }
365
366         }
367
368         if (data->ioc_dev == OBD_DEV_BY_DEVNAME) {
369                 if (data->ioc_inllen4 <= 0 || data->ioc_inlbuf4 == NULL)
370                         GOTO(out, err = -EINVAL);
371                 if (strnlen(data->ioc_inlbuf4, MAX_OBD_NAME) >= MAX_OBD_NAME)
372                         GOTO(out, err = -EINVAL);
373                 obd = class_name2obd(data->ioc_inlbuf4);
374         } else if (data->ioc_dev < class_devno_max()) {
375                 obd = class_num2obd(data->ioc_dev);
376         } else {
377                 CERROR("OBD ioctl: No device\n");
378                 GOTO(out, err = -EINVAL);
379         }
380
381         if (obd == NULL) {
382                 CERROR("OBD ioctl : No Device %d\n", data->ioc_dev);
383                 GOTO(out, err = -EINVAL);
384         }
385         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
386
387         if (!obd->obd_set_up || obd->obd_stopping) {
388                 CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev);
389                 GOTO(out, err = -EINVAL);
390         }
391
392         switch(cmd) {
393         case OBD_IOC_NO_TRANSNO: {
394                 if (!obd->obd_attached) {
395                         CERROR("Device %d not attached\n", obd->obd_minor);
396                         GOTO(out, err = -ENODEV);
397                 }
398                 CDEBUG(D_HA, "%s: disabling committed-transno notification\n",
399                        obd->obd_name);
400                 obd->obd_no_transno = 1;
401                 GOTO(out, err = 0);
402         }
403
404         default: {
405                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
406                 if (err)
407                         GOTO(out, err);
408
409                 err = obd_ioctl_popdata((void __user *)arg, data, len);
410                 if (err)
411                         err = -EFAULT;
412                 GOTO(out, err);
413         }
414         }
415
416  out:
417         if (buf)
418                 obd_ioctl_freedata(buf, len);
419         RETURN(err);
420 } /* class_handle_ioctl */
421
422 #define OBD_INIT_CHECK
423 #ifdef OBD_INIT_CHECK
424 static int obd_init_checks(void)
425 {
426         __u64 u64val, div64val;
427         char buf[64];
428         int len, ret = 0;
429
430         CDEBUG(D_INFO, "OBD_OBJECT_EOF = %#llx\n", (__u64)OBD_OBJECT_EOF);
431
432         u64val = OBD_OBJECT_EOF;
433         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = %#llx\n", u64val);
434         if (u64val != OBD_OBJECT_EOF) {
435                 CERROR("__u64 %#llx(%d) != 0xffffffffffffffff\n",
436                        u64val, (int)sizeof(u64val));
437                 ret = -EINVAL;
438         }
439         len = snprintf(buf, sizeof(buf), "%#llx", u64val);
440         if (len != 18) {
441                 CWARN("u64 hex wrong length! strlen(%s)=%d != 18\n", buf, len);
442                 ret = -EINVAL;
443         }
444
445         div64val = OBD_OBJECT_EOF;
446         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = %#llx\n", u64val);
447         if (u64val != OBD_OBJECT_EOF) {
448                 CERROR("__u64 %#llx(%d) != 0xffffffffffffffff\n",
449                        u64val, (int)sizeof(u64val));
450                 ret = -EOVERFLOW;
451         }
452         if (u64val >> 8 != OBD_OBJECT_EOF >> 8) {
453                 CERROR("__u64 %#llx(%d) != 0xffffffffffffffff\n",
454                        u64val, (int)sizeof(u64val));
455                 return -EOVERFLOW;
456         }
457         if (do_div(div64val, 256) != (u64val & 255)) {
458                 CERROR("do_div(%#llx,256) != %llu\n", u64val, u64val & 255);
459                 return -EOVERFLOW;
460         }
461         if (u64val >> 8 != div64val) {
462                 CERROR("do_div(%#llx,256) %llu != %llu\n",
463                        u64val, div64val, u64val >> 8);
464                 return -EOVERFLOW;
465         }
466         len = snprintf(buf, sizeof(buf), "%#llx", u64val);
467         if (len != 18) {
468                 CWARN("u64 hex wrong length! strlen(%s)=%d != 18\n", buf, len);
469                 ret = -EINVAL;
470         }
471         len = snprintf(buf, sizeof(buf), "%llu", u64val);
472         if (len != 20) {
473                 CWARN("u64 wrong length! strlen(%s)=%d != 20\n", buf, len);
474                 ret = -EINVAL;
475         }
476         len = snprintf(buf, sizeof(buf), "%lld", u64val);
477         if (len != 2) {
478                 CWARN("s64 wrong length! strlen(%s)=%d != 2\n", buf, len);
479                 ret = -EINVAL;
480         }
481         if ((u64val & ~PAGE_CACHE_MASK) >= PAGE_CACHE_SIZE) {
482                 CWARN("mask failed: u64val %llu >= %llu\n", u64val,
483                       (__u64)PAGE_CACHE_SIZE);
484                 ret = -EINVAL;
485         }
486
487         return ret;
488 }
489 #else
490 #define obd_init_checks() do {} while(0)
491 #endif
492
493 static int __init obdclass_init(void)
494 {
495         int i, err;
496
497         spin_lock_init(&obd_stale_export_lock);
498         INIT_LIST_HEAD(&obd_stale_exports);
499         atomic_set(&obd_stale_export_num, 0);
500
501         LCONSOLE_INFO("Lustre: Build Version: "LUSTRE_VERSION_STRING"\n");
502
503         spin_lock_init(&obd_types_lock);
504         obd_zombie_impexp_init();
505 #ifdef CONFIG_PROC_FS
506         obd_memory = lprocfs_alloc_stats(OBD_STATS_NUM,
507                                          LPROCFS_STATS_FLAG_NONE |
508                                          LPROCFS_STATS_FLAG_IRQ_SAFE);
509         if (obd_memory == NULL) {
510                 CERROR("kmalloc of 'obd_memory' failed\n");
511                 RETURN(-ENOMEM);
512         }
513
514         lprocfs_counter_init(obd_memory, OBD_MEMORY_STAT,
515                              LPROCFS_CNTR_AVGMINMAX,
516                              "memused", "bytes");
517 #endif
518         err = obd_init_checks();
519         if (err == -EOVERFLOW)
520                 return err;
521
522         class_init_uuidlist();
523         err = class_handle_init();
524         if (err)
525                 return err;
526
527         INIT_LIST_HEAD(&obd_types);
528
529         err = misc_register(&obd_psdev);
530         if (err) {
531                 CERROR("cannot register %d err %d\n", OBD_DEV_MINOR, err);
532                 return err;
533         }
534
535         /* This struct is already zeroed for us (static global) */
536         for (i = 0; i < class_devno_max(); i++)
537                 obd_devs[i] = NULL;
538
539         /* Default the dirty page cache cap to 1/2 of system memory.
540          * For clients with less memory, a larger fraction is needed
541          * for other purposes (mostly for BGL). */
542         if (totalram_pages <= 512 << (20 - PAGE_CACHE_SHIFT))
543                 obd_max_dirty_pages = totalram_pages / 4;
544         else
545                 obd_max_dirty_pages = totalram_pages / 2;
546
547         err = obd_init_caches();
548         if (err)
549                 return err;
550         err = class_procfs_init();
551         if (err)
552                 return err;
553
554         err = lu_global_init();
555         if (err)
556                 return err;
557
558         err = cl_global_init();
559         if (err != 0)
560                 return err;
561
562 #ifdef HAVE_SERVER_SUPPORT
563         err = dt_global_init();
564         if (err != 0)
565                 return err;
566
567         err = lu_ucred_global_init();
568         if (err != 0)
569                 return err;
570 #endif /* HAVE_SERVER_SUPPORT */
571
572         err = llog_info_init();
573         if (err)
574                 return err;
575
576         err = lustre_register_fs();
577
578         return err;
579 }
580
581 void obd_update_maxusage(void)
582 {
583         __u64 max;
584
585         max = obd_memory_sum();
586
587         spin_lock(&obd_updatemax_lock);
588         if (max > obd_max_alloc)
589                 obd_max_alloc = max;
590         spin_unlock(&obd_updatemax_lock);
591 }
592 EXPORT_SYMBOL(obd_update_maxusage);
593
594 #ifdef CONFIG_PROC_FS
595 __u64 obd_memory_max(void)
596 {
597         __u64 ret;
598
599         obd_update_maxusage();
600         spin_lock(&obd_updatemax_lock);
601         ret = obd_max_alloc;
602         spin_unlock(&obd_updatemax_lock);
603
604         return ret;
605 }
606 #endif /* CONFIG_PROC_FS */
607
608 static void __exit obdclass_exit(void)
609 {
610         __u64 memory_leaked;
611         __u64 memory_max;
612         ENTRY;
613
614         lustre_unregister_fs();
615
616         misc_deregister(&obd_psdev);
617         llog_info_fini();
618 #ifdef HAVE_SERVER_SUPPORT
619         lu_ucred_global_fini();
620         dt_global_fini();
621 #endif /* HAVE_SERVER_SUPPORT */
622         cl_global_fini();
623         lu_global_fini();
624
625         obd_cleanup_caches();
626         obd_sysctl_clean();
627
628         class_procfs_clean();
629
630         class_handle_cleanup();
631         class_exit_uuidlist();
632         obd_zombie_impexp_stop();
633         LASSERT(list_empty(&obd_stale_exports));
634
635         memory_leaked = obd_memory_sum();
636
637         memory_max = obd_memory_max();
638
639         lprocfs_free_stats(&obd_memory);
640         CDEBUG((memory_leaked) ? D_ERROR : D_INFO,
641                "obd_memory max: %llu, leaked: %llu\n",
642                memory_max, memory_leaked);
643
644         EXIT;
645 }
646
647 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
648 MODULE_DESCRIPTION("Lustre Class Driver");
649 MODULE_VERSION(LUSTRE_VERSION_STRING);
650 MODULE_LICENSE("GPL");
651
652 module_init(obdclass_init);
653 module_exit(obdclass_exit);