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LU-4629 ldlm: fix uninitialized variable
[fs/lustre-release.git] / lustre / obdclass / obd_config.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) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
28  * Use is subject to license terms.
29  *
30  * Copyright (c) 2011, 2013, 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  * lustre/obdclass/obd_config.c
37  *
38  * Config API
39  */
40
41 #define DEBUG_SUBSYSTEM S_CLASS
42 #ifdef __KERNEL__
43 #include <obd_class.h>
44 #include <linux/string.h>
45 #include <lustre_disk.h>
46 #else
47 #include <liblustre.h>
48 #include <string.h>
49 #include <obd_class.h>
50 #include <obd.h>
51 #endif
52 #include <lustre_ioctl.h>
53 #include <lustre_log.h>
54 #include <lprocfs_status.h>
55 #include <lustre_param.h>
56
57 #include "llog_internal.h"
58
59 static cfs_hash_ops_t uuid_hash_ops;
60 static cfs_hash_ops_t nid_hash_ops;
61 static cfs_hash_ops_t nid_stat_hash_ops;
62
63 /*********** string parsing utils *********/
64
65 /* returns 0 if we find this key in the buffer, else 1 */
66 int class_find_param(char *buf, char *key, char **valp)
67 {
68         char *ptr;
69
70         if (!buf)
71                 return 1;
72
73         if ((ptr = strstr(buf, key)) == NULL)
74                 return 1;
75
76         if (valp)
77                 *valp = ptr + strlen(key);
78
79         return 0;
80 }
81 EXPORT_SYMBOL(class_find_param);
82
83 /**
84  * Check whether the proc parameter \a param is an old parameter or not from
85  * the array \a ptr which contains the mapping from old parameters to new ones.
86  * If it's an old one, then return the pointer to the cfg_interop_param struc-
87  * ture which contains both the old and new parameters.
88  *
89  * \param param                 proc parameter
90  * \param ptr                   an array which contains the mapping from
91  *                              old parameters to new ones
92  *
93  * \retval valid-pointer        pointer to the cfg_interop_param structure
94  *                              which contains the old and new parameters
95  * \retval NULL                 \a param or \a ptr is NULL,
96  *                              or \a param is not an old parameter
97  */
98 struct cfg_interop_param *class_find_old_param(const char *param,
99                                                struct cfg_interop_param *ptr)
100 {
101         char *value = NULL;
102         int   name_len = 0;
103
104         if (param == NULL || ptr == NULL)
105                 RETURN(NULL);
106
107         value = strchr(param, '=');
108         if (value == NULL)
109                 name_len = strlen(param);
110         else
111                 name_len = value - param;
112
113         while (ptr->old_param != NULL) {
114                 if (strncmp(param, ptr->old_param, name_len) == 0 &&
115                     name_len == strlen(ptr->old_param))
116                         RETURN(ptr);
117                 ptr++;
118         }
119
120         RETURN(NULL);
121 }
122 EXPORT_SYMBOL(class_find_old_param);
123
124 /**
125  * Finds a parameter in \a params and copies it to \a copy.
126  *
127  * Leading spaces are skipped. Next space or end of string is the
128  * parameter terminator with the exception that spaces inside single or double
129  * quotes get included into a parameter. The parameter is copied into \a copy
130  * which has to be allocated big enough by a caller, quotes are stripped in
131  * the copy and the copy is terminated by 0.
132  *
133  * On return \a params is set to next parameter or to NULL if last
134  * parameter is returned.
135  *
136  * \retval 0 if parameter is returned in \a copy
137  * \retval 1 otherwise
138  * \retval -EINVAL if unbalanced quota is found
139  */
140 int class_get_next_param(char **params, char *copy)
141 {
142         char *q1, *q2, *str;
143         int len;
144
145         str = *params;
146         while (*str == ' ')
147                 str++;
148
149         if (*str == '\0') {
150                 *params = NULL;
151                 return 1;
152         }
153
154         while (1) {
155                 q1 = strpbrk(str, " '\"");
156                 if (q1 == NULL) {
157                         len = strlen(str);
158                         memcpy(copy, str, len);
159                         copy[len] = '\0';
160                         *params = NULL;
161                         return 0;
162                 }
163                 len = q1 - str;
164                 if (*q1 == ' ') {
165                         memcpy(copy, str, len);
166                         copy[len] = '\0';
167                         *params = str + len;
168                         return 0;
169                 }
170
171                 memcpy(copy, str, len);
172                 copy += len;
173
174                 /* search for the matching closing quote */
175                 str = q1 + 1;
176                 q2 = strchr(str, *q1);
177                 if (q2 == NULL) {
178                         CERROR("Unbalanced quota in parameters: \"%s\"\n",
179                                *params);
180                         return -EINVAL;
181                 }
182                 len = q2 - str;
183                 memcpy(copy, str, len);
184                 copy += len;
185                 str = q2 + 1;
186         }
187         return 1;
188 }
189 EXPORT_SYMBOL(class_get_next_param);
190
191 /* returns 0 if this is the first key in the buffer, else 1.
192    valp points to first char after key. */
193 int class_match_param(char *buf, char *key, char **valp)
194 {
195         if (!buf)
196                 return 1;
197
198         if (memcmp(buf, key, strlen(key)) != 0)
199                 return 1;
200
201         if (valp)
202                 *valp = buf + strlen(key);
203
204         return 0;
205 }
206 EXPORT_SYMBOL(class_match_param);
207
208 static int parse_nid(char *buf, void *value, int quiet)
209 {
210         lnet_nid_t *nid = (lnet_nid_t *)value;
211
212         *nid = libcfs_str2nid(buf);
213         if (*nid != LNET_NID_ANY)
214                 return 0;
215
216         if (!quiet)
217                 LCONSOLE_ERROR_MSG(0x159, "Can't parse NID '%s'\n", buf);
218         return -EINVAL;
219 }
220
221 static int parse_net(char *buf, void *value)
222 {
223         __u32 *net = (__u32 *)value;
224
225         *net = libcfs_str2net(buf);
226         CDEBUG(D_INFO, "Net %s\n", libcfs_net2str(*net));
227         return 0;
228 }
229
230 enum {
231         CLASS_PARSE_NID = 1,
232         CLASS_PARSE_NET,
233 };
234
235 /* 0 is good nid,
236    1 not found
237    < 0 error
238    endh is set to next separator */
239 static int class_parse_value(char *buf, int opc, void *value, char **endh,
240                              int quiet)
241 {
242         char *endp;
243         char  tmp;
244         int   rc = 0;
245
246         if (!buf)
247                 return 1;
248         while (*buf == ',' || *buf == ':')
249                 buf++;
250         if (*buf == ' ' || *buf == '/' || *buf == '\0')
251                 return 1;
252
253         /* nid separators or end of nids */
254         endp = strpbrk(buf, ",: /");
255         if (endp == NULL)
256                 endp = buf + strlen(buf);
257
258         tmp = *endp;
259         *endp = '\0';
260         switch (opc) {
261         default:
262                 LBUG();
263         case CLASS_PARSE_NID:
264                 rc = parse_nid(buf, value, quiet);
265                 break;
266         case CLASS_PARSE_NET:
267                 rc = parse_net(buf, value);
268                 break;
269         }
270         *endp = tmp;
271         if (rc != 0)
272                 return rc;
273         if (endh)
274                 *endh = endp;
275         return 0;
276 }
277
278 int class_parse_nid(char *buf, lnet_nid_t *nid, char **endh)
279 {
280         return class_parse_value(buf, CLASS_PARSE_NID, (void *)nid, endh, 0);
281 }
282 EXPORT_SYMBOL(class_parse_nid);
283
284 int class_parse_nid_quiet(char *buf, lnet_nid_t *nid, char **endh)
285 {
286         return class_parse_value(buf, CLASS_PARSE_NID, (void *)nid, endh, 1);
287 }
288 EXPORT_SYMBOL(class_parse_nid_quiet);
289
290 int class_parse_net(char *buf, __u32 *net, char **endh)
291 {
292         return class_parse_value(buf, CLASS_PARSE_NET, (void *)net, endh, 0);
293 }
294 EXPORT_SYMBOL(class_parse_net);
295
296 /* 1 param contains key and match
297  * 0 param contains key and not match
298  * -1 param does not contain key
299  */
300 int class_match_nid(char *buf, char *key, lnet_nid_t nid)
301 {
302         lnet_nid_t tmp;
303         int   rc = -1;
304
305         while (class_find_param(buf, key, &buf) == 0) {
306                 /* please restrict to the nids pertaining to
307                  * the specified nids */
308                 while (class_parse_nid(buf, &tmp, &buf) == 0) {
309                         if (tmp == nid)
310                                 return 1;
311                 }
312                 rc = 0;
313         }
314         return rc;
315 }
316 EXPORT_SYMBOL(class_match_nid);
317
318 int class_match_net(char *buf, char *key, __u32 net)
319 {
320         __u32 tmp;
321         int   rc = -1;
322
323         while (class_find_param(buf, key, &buf) == 0) {
324                 /* please restrict to the nids pertaining to
325                  * the specified networks */
326                 while (class_parse_net(buf, &tmp, &buf) == 0) {
327                         if (tmp == net)
328                                 return 1;
329                 }
330                 rc = 0;
331         }
332         return rc;
333 }
334 EXPORT_SYMBOL(class_match_net);
335
336 /********************** class fns **********************/
337
338 /**
339  * Create a new obd device and set the type, name and uuid.  If successful,
340  * the new device can be accessed by either name or uuid.
341  */
342 int class_attach(struct lustre_cfg *lcfg)
343 {
344         struct obd_device *obd = NULL;
345         char *typename, *name, *uuid;
346         int rc, len;
347         ENTRY;
348
349         if (!LUSTRE_CFG_BUFLEN(lcfg, 1)) {
350                 CERROR("No type passed!\n");
351                 RETURN(-EINVAL);
352         }
353         typename = lustre_cfg_string(lcfg, 1);
354
355         if (!LUSTRE_CFG_BUFLEN(lcfg, 0)) {
356                 CERROR("No name passed!\n");
357                 RETURN(-EINVAL);
358         }
359         name = lustre_cfg_string(lcfg, 0);
360
361         if (!LUSTRE_CFG_BUFLEN(lcfg, 2)) {
362                 CERROR("No UUID passed!\n");
363                 RETURN(-EINVAL);
364         }
365         uuid = lustre_cfg_string(lcfg, 2);
366
367         CDEBUG(D_IOCTL, "attach type %s name: %s uuid: %s\n",
368                MKSTR(typename), MKSTR(name), MKSTR(uuid));
369
370         obd = class_newdev(typename, name);
371         if (IS_ERR(obd)) {
372                 /* Already exists or out of obds */
373                 rc = PTR_ERR(obd);
374                 obd = NULL;
375                 CERROR("Cannot create device %s of type %s : %d\n",
376                        name, typename, rc);
377                 GOTO(out, rc);
378         }
379         LASSERTF(obd != NULL, "Cannot get obd device %s of type %s\n",
380                  name, typename);
381         LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
382                  "obd %p obd_magic %08X != %08X\n",
383                  obd, obd->obd_magic, OBD_DEVICE_MAGIC);
384         LASSERTF(strncmp(obd->obd_name, name, strlen(name)) == 0,
385                  "%p obd_name %s != %s\n", obd, obd->obd_name, name);
386
387         rwlock_init(&obd->obd_pool_lock);
388         obd->obd_pool_limit = 0;
389         obd->obd_pool_slv = 0;
390
391         CFS_INIT_LIST_HEAD(&obd->obd_exports);
392         CFS_INIT_LIST_HEAD(&obd->obd_unlinked_exports);
393         CFS_INIT_LIST_HEAD(&obd->obd_delayed_exports);
394         CFS_INIT_LIST_HEAD(&obd->obd_exports_timed);
395         CFS_INIT_LIST_HEAD(&obd->obd_nid_stats);
396         spin_lock_init(&obd->obd_nid_lock);
397         spin_lock_init(&obd->obd_dev_lock);
398         mutex_init(&obd->obd_dev_mutex);
399         spin_lock_init(&obd->obd_osfs_lock);
400         /* obd->obd_osfs_age must be set to a value in the distant
401          * past to guarantee a fresh statfs is fetched on mount. */
402         obd->obd_osfs_age = cfs_time_shift_64(-1000);
403
404         /* XXX belongs in setup not attach  */
405         init_rwsem(&obd->obd_observer_link_sem);
406         /* recovery data */
407         cfs_init_timer(&obd->obd_recovery_timer);
408         spin_lock_init(&obd->obd_recovery_task_lock);
409         init_waitqueue_head(&obd->obd_next_transno_waitq);
410         init_waitqueue_head(&obd->obd_evict_inprogress_waitq);
411         CFS_INIT_LIST_HEAD(&obd->obd_req_replay_queue);
412         CFS_INIT_LIST_HEAD(&obd->obd_lock_replay_queue);
413         CFS_INIT_LIST_HEAD(&obd->obd_final_req_queue);
414         CFS_INIT_LIST_HEAD(&obd->obd_evict_list);
415         INIT_LIST_HEAD(&obd->obd_lwp_list);
416
417         llog_group_init(&obd->obd_olg);
418
419         obd->obd_conn_inprogress = 0;
420
421         len = strlen(uuid);
422         if (len >= sizeof(obd->obd_uuid)) {
423                 CERROR("uuid must be < %d bytes long\n",
424                        (int)sizeof(obd->obd_uuid));
425                 GOTO(out, rc = -EINVAL);
426         }
427         memcpy(obd->obd_uuid.uuid, uuid, len);
428
429         /* Detach drops this */
430         spin_lock(&obd->obd_dev_lock);
431         atomic_set(&obd->obd_refcount, 1);
432         spin_unlock(&obd->obd_dev_lock);
433         lu_ref_init(&obd->obd_reference);
434         lu_ref_add(&obd->obd_reference, "attach", obd);
435
436         obd->obd_attached = 1;
437         CDEBUG(D_IOCTL, "OBD: dev %d attached type %s with refcount %d\n",
438                obd->obd_minor, typename, atomic_read(&obd->obd_refcount));
439         RETURN(0);
440  out:
441         if (obd != NULL) {
442                 class_release_dev(obd);
443         }
444         return rc;
445 }
446 EXPORT_SYMBOL(class_attach);
447
448 /** Create hashes, self-export, and call type-specific setup.
449  * Setup is effectively the "start this obd" call.
450  */
451 int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
452 {
453         int err = 0;
454         struct obd_export *exp;
455         ENTRY;
456
457         LASSERT(obd != NULL);
458         LASSERTF(obd == class_num2obd(obd->obd_minor),
459                  "obd %p != obd_devs[%d] %p\n",
460                  obd, obd->obd_minor, class_num2obd(obd->obd_minor));
461         LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
462                  "obd %p obd_magic %08x != %08x\n",
463                  obd, obd->obd_magic, OBD_DEVICE_MAGIC);
464
465         /* have we attached a type to this device? */
466         if (!obd->obd_attached) {
467                 CERROR("Device %d not attached\n", obd->obd_minor);
468                 RETURN(-ENODEV);
469         }
470
471         if (obd->obd_set_up) {
472                 CERROR("Device %d already setup (type %s)\n",
473                        obd->obd_minor, obd->obd_type->typ_name);
474                 RETURN(-EEXIST);
475         }
476
477         /* is someone else setting us up right now? (attach inits spinlock) */
478         spin_lock(&obd->obd_dev_lock);
479         if (obd->obd_starting) {
480                 spin_unlock(&obd->obd_dev_lock);
481                 CERROR("Device %d setup in progress (type %s)\n",
482                        obd->obd_minor, obd->obd_type->typ_name);
483                 RETURN(-EEXIST);
484         }
485         /* just leave this on forever.  I can't use obd_set_up here because
486            other fns check that status, and we're not actually set up yet. */
487         obd->obd_starting = 1;
488         obd->obd_uuid_hash = NULL;
489         obd->obd_nid_hash = NULL;
490         obd->obd_nid_stats_hash = NULL;
491         spin_unlock(&obd->obd_dev_lock);
492
493         /* create an uuid-export lustre hash */
494         obd->obd_uuid_hash = cfs_hash_create("UUID_HASH",
495                                              HASH_UUID_CUR_BITS,
496                                              HASH_UUID_MAX_BITS,
497                                              HASH_UUID_BKT_BITS, 0,
498                                              CFS_HASH_MIN_THETA,
499                                              CFS_HASH_MAX_THETA,
500                                              &uuid_hash_ops, CFS_HASH_DEFAULT);
501         if (!obd->obd_uuid_hash)
502                 GOTO(err_hash, err = -ENOMEM);
503
504         /* create a nid-export lustre hash */
505         obd->obd_nid_hash = cfs_hash_create("NID_HASH",
506                                             HASH_NID_CUR_BITS,
507                                             HASH_NID_MAX_BITS,
508                                             HASH_NID_BKT_BITS, 0,
509                                             CFS_HASH_MIN_THETA,
510                                             CFS_HASH_MAX_THETA,
511                                             &nid_hash_ops, CFS_HASH_DEFAULT);
512         if (!obd->obd_nid_hash)
513                 GOTO(err_hash, err = -ENOMEM);
514
515         /* create a nid-stats lustre hash */
516         obd->obd_nid_stats_hash = cfs_hash_create("NID_STATS",
517                                                   HASH_NID_STATS_CUR_BITS,
518                                                   HASH_NID_STATS_MAX_BITS,
519                                                   HASH_NID_STATS_BKT_BITS, 0,
520                                                   CFS_HASH_MIN_THETA,
521                                                   CFS_HASH_MAX_THETA,
522                                                   &nid_stat_hash_ops, CFS_HASH_DEFAULT);
523         if (!obd->obd_nid_stats_hash)
524                 GOTO(err_hash, err = -ENOMEM);
525
526         exp = class_new_export(obd, &obd->obd_uuid);
527         if (IS_ERR(exp))
528                 GOTO(err_hash, err = PTR_ERR(exp));
529
530         obd->obd_self_export = exp;
531         cfs_list_del_init(&exp->exp_obd_chain_timed);
532         class_export_put(exp);
533
534         err = obd_setup(obd, lcfg);
535         if (err)
536                 GOTO(err_exp, err);
537
538         obd->obd_set_up = 1;
539
540         spin_lock(&obd->obd_dev_lock);
541         /* cleanup drops this */
542         class_incref(obd, "setup", obd);
543         spin_unlock(&obd->obd_dev_lock);
544
545         CDEBUG(D_IOCTL, "finished setup of obd %s (uuid %s)\n",
546                obd->obd_name, obd->obd_uuid.uuid);
547
548         RETURN(0);
549 err_exp:
550         if (obd->obd_self_export) {
551                 class_unlink_export(obd->obd_self_export);
552                 obd->obd_self_export = NULL;
553         }
554 err_hash:
555         if (obd->obd_uuid_hash) {
556                 cfs_hash_putref(obd->obd_uuid_hash);
557                 obd->obd_uuid_hash = NULL;
558         }
559         if (obd->obd_nid_hash) {
560                 cfs_hash_putref(obd->obd_nid_hash);
561                 obd->obd_nid_hash = NULL;
562         }
563         if (obd->obd_nid_stats_hash) {
564                 cfs_hash_putref(obd->obd_nid_stats_hash);
565                 obd->obd_nid_stats_hash = NULL;
566         }
567         obd->obd_starting = 0;
568         CERROR("setup %s failed (%d)\n", obd->obd_name, err);
569         return err;
570 }
571 EXPORT_SYMBOL(class_setup);
572
573 /** We have finished using this obd and are ready to destroy it.
574  * There can be no more references to this obd.
575  */
576 int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg)
577 {
578         ENTRY;
579
580         if (obd->obd_set_up) {
581                 CERROR("OBD device %d still set up\n", obd->obd_minor);
582                 RETURN(-EBUSY);
583         }
584
585         spin_lock(&obd->obd_dev_lock);
586         if (!obd->obd_attached) {
587                 spin_unlock(&obd->obd_dev_lock);
588                 CERROR("OBD device %d not attached\n", obd->obd_minor);
589                 RETURN(-ENODEV);
590         }
591         obd->obd_attached = 0;
592         spin_unlock(&obd->obd_dev_lock);
593
594         CDEBUG(D_IOCTL, "detach on obd %s (uuid %s)\n",
595                obd->obd_name, obd->obd_uuid.uuid);
596
597         class_decref(obd, "attach", obd);
598         RETURN(0);
599 }
600 EXPORT_SYMBOL(class_detach);
601
602 /** Start shutting down the obd.  There may be in-progess ops when
603  * this is called.  We tell them to start shutting down with a call
604  * to class_disconnect_exports().
605  */
606 int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg)
607 {
608         int err = 0;
609         char *flag;
610         ENTRY;
611
612         OBD_RACE(OBD_FAIL_LDLM_RECOV_CLIENTS);
613
614         if (!obd->obd_set_up) {
615                 CERROR("Device %d not setup\n", obd->obd_minor);
616                 RETURN(-ENODEV);
617         }
618
619         spin_lock(&obd->obd_dev_lock);
620         if (obd->obd_stopping) {
621                 spin_unlock(&obd->obd_dev_lock);
622                 CERROR("OBD %d already stopping\n", obd->obd_minor);
623                 RETURN(-ENODEV);
624         }
625         /* Leave this on forever */
626         obd->obd_stopping = 1;
627
628         /* wait for already-arrived-connections to finish. */
629         while (obd->obd_conn_inprogress > 0) {
630                 spin_unlock(&obd->obd_dev_lock);
631
632                 cond_resched();
633
634                 spin_lock(&obd->obd_dev_lock);
635         }
636         spin_unlock(&obd->obd_dev_lock);
637
638         if (lcfg->lcfg_bufcount >= 2 && LUSTRE_CFG_BUFLEN(lcfg, 1) > 0) {
639                 for (flag = lustre_cfg_string(lcfg, 1); *flag != 0; flag++)
640                         switch (*flag) {
641                         case 'F':
642                                 obd->obd_force = 1;
643                                 break;
644                         case 'A':
645                                 LCONSOLE_WARN("Failing over %s\n",
646                                               obd->obd_name);
647                                 obd->obd_fail = 1;
648                                 obd->obd_no_transno = 1;
649                                 obd->obd_no_recov = 1;
650                                 if (OBP(obd, iocontrol)) {
651                                         obd_iocontrol(OBD_IOC_SYNC,
652                                                       obd->obd_self_export,
653                                                       0, NULL, NULL);
654                                 }
655                                 break;
656                         default:
657                                 CERROR("Unrecognised flag '%c'\n", *flag);
658                         }
659         }
660
661         LASSERT(obd->obd_self_export);
662
663         /* The three references that should be remaining are the
664          * obd_self_export and the attach and setup references. */
665         if (atomic_read(&obd->obd_refcount) > 3) {
666                 /* refcounf - 3 might be the number of real exports
667                    (excluding self export). But class_incref is called
668                    by other things as well, so don't count on it. */
669                 CDEBUG(D_IOCTL, "%s: forcing exports to disconnect: %d\n",
670                        obd->obd_name, atomic_read(&obd->obd_refcount) - 3);
671                 dump_exports(obd, 0);
672                 class_disconnect_exports(obd);
673         }
674
675         /* Precleanup, we must make sure all exports get destroyed. */
676         err = obd_precleanup(obd, OBD_CLEANUP_EXPORTS);
677         if (err)
678                 CERROR("Precleanup %s returned %d\n",
679                        obd->obd_name, err);
680
681         /* destroy an uuid-export hash body */
682         if (obd->obd_uuid_hash) {
683                 cfs_hash_putref(obd->obd_uuid_hash);
684                 obd->obd_uuid_hash = NULL;
685         }
686
687         /* destroy a nid-export hash body */
688         if (obd->obd_nid_hash) {
689                 cfs_hash_putref(obd->obd_nid_hash);
690                 obd->obd_nid_hash = NULL;
691         }
692
693         /* destroy a nid-stats hash body */
694         if (obd->obd_nid_stats_hash) {
695                 cfs_hash_putref(obd->obd_nid_stats_hash);
696                 obd->obd_nid_stats_hash = NULL;
697         }
698
699         class_decref(obd, "setup", obd);
700         obd->obd_set_up = 0;
701
702         RETURN(0);
703 }
704 EXPORT_SYMBOL(class_cleanup);
705
706 struct obd_device *class_incref(struct obd_device *obd,
707                                 const char *scope, const void *source)
708 {
709         lu_ref_add_atomic(&obd->obd_reference, scope, source);
710         atomic_inc(&obd->obd_refcount);
711         CDEBUG(D_INFO, "incref %s (%p) now %d\n", obd->obd_name, obd,
712                atomic_read(&obd->obd_refcount));
713
714         return obd;
715 }
716 EXPORT_SYMBOL(class_incref);
717
718 void class_decref(struct obd_device *obd, const char *scope, const void *source)
719 {
720         int err;
721         int refs;
722
723         spin_lock(&obd->obd_dev_lock);
724         atomic_dec(&obd->obd_refcount);
725         refs = atomic_read(&obd->obd_refcount);
726         spin_unlock(&obd->obd_dev_lock);
727         lu_ref_del(&obd->obd_reference, scope, source);
728
729         CDEBUG(D_INFO, "Decref %s (%p) now %d\n", obd->obd_name, obd, refs);
730
731         if ((refs == 1) && obd->obd_stopping) {
732                 /* All exports have been destroyed; there should
733                    be no more in-progress ops by this point.*/
734
735                 spin_lock(&obd->obd_self_export->exp_lock);
736                 obd->obd_self_export->exp_flags |= exp_flags_from_obd(obd);
737                 spin_unlock(&obd->obd_self_export->exp_lock);
738
739                 /* note that we'll recurse into class_decref again */
740                 class_unlink_export(obd->obd_self_export);
741                 return;
742         }
743
744         if (refs == 0) {
745                 CDEBUG(D_CONFIG, "finishing cleanup of obd %s (%s)\n",
746                        obd->obd_name, obd->obd_uuid.uuid);
747                 LASSERT(!obd->obd_attached);
748                 if (obd->obd_stopping) {
749                         /* If we're not stopping, we were never set up */
750                         err = obd_cleanup(obd);
751                         if (err)
752                                 CERROR("Cleanup %s returned %d\n",
753                                        obd->obd_name, err);
754                 }
755
756                 class_release_dev(obd);
757         }
758 }
759 EXPORT_SYMBOL(class_decref);
760
761 /** Add a failover nid location.
762  * Client obd types contact server obd types using this nid list.
763  */
764 int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
765 {
766         struct obd_import *imp;
767         struct obd_uuid uuid;
768         int rc;
769         ENTRY;
770
771         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
772             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
773                 CERROR("invalid conn_uuid\n");
774                 RETURN(-EINVAL);
775         }
776         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
777             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) &&
778             strcmp(obd->obd_type->typ_name, LUSTRE_OSP_NAME) &&
779             strcmp(obd->obd_type->typ_name, LUSTRE_LWP_NAME) &&
780             strcmp(obd->obd_type->typ_name, LUSTRE_MGC_NAME)) {
781                 CERROR("can't add connection on non-client dev\n");
782                 RETURN(-EINVAL);
783         }
784
785         imp = obd->u.cli.cl_import;
786         if (!imp) {
787                 CERROR("try to add conn on immature client dev\n");
788                 RETURN(-EINVAL);
789         }
790
791         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
792         rc = obd_add_conn(imp, &uuid, lcfg->lcfg_num);
793
794         RETURN(rc);
795 }
796 EXPORT_SYMBOL(class_add_conn);
797
798 /** Remove a failover nid location.
799  */
800 int class_del_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
801 {
802         struct obd_import *imp;
803         struct obd_uuid uuid;
804         int rc;
805         ENTRY;
806
807         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
808             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
809                 CERROR("invalid conn_uuid\n");
810                 RETURN(-EINVAL);
811         }
812         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
813             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME)) {
814                 CERROR("can't del connection on non-client dev\n");
815                 RETURN(-EINVAL);
816         }
817
818         imp = obd->u.cli.cl_import;
819         if (!imp) {
820                 CERROR("try to del conn on immature client dev\n");
821                 RETURN(-EINVAL);
822         }
823
824         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
825         rc = obd_del_conn(imp, &uuid);
826
827         RETURN(rc);
828 }
829
830 CFS_LIST_HEAD(lustre_profile_list);
831
832 struct lustre_profile *class_get_profile(const char * prof)
833 {
834         struct lustre_profile *lprof;
835
836         ENTRY;
837         cfs_list_for_each_entry(lprof, &lustre_profile_list, lp_list) {
838                 if (!strcmp(lprof->lp_profile, prof)) {
839                         RETURN(lprof);
840                 }
841         }
842         RETURN(NULL);
843 }
844 EXPORT_SYMBOL(class_get_profile);
845
846 /** Create a named "profile".
847  * This defines the mdc and osc names to use for a client.
848  * This also is used to define the lov to be used by a mdt.
849  */
850 int class_add_profile(int proflen, char *prof, int osclen, char *osc,
851                       int mdclen, char *mdc)
852 {
853         struct lustre_profile *lprof;
854         int err = 0;
855         ENTRY;
856
857         CDEBUG(D_CONFIG, "Add profile %s\n", prof);
858
859         OBD_ALLOC(lprof, sizeof(*lprof));
860         if (lprof == NULL)
861                 RETURN(-ENOMEM);
862         CFS_INIT_LIST_HEAD(&lprof->lp_list);
863
864         LASSERT(proflen == (strlen(prof) + 1));
865         OBD_ALLOC(lprof->lp_profile, proflen);
866         if (lprof->lp_profile == NULL)
867                 GOTO(out, err = -ENOMEM);
868         memcpy(lprof->lp_profile, prof, proflen);
869
870         LASSERT(osclen == (strlen(osc) + 1));
871         OBD_ALLOC(lprof->lp_dt, osclen);
872         if (lprof->lp_dt == NULL)
873                 GOTO(out, err = -ENOMEM);
874         memcpy(lprof->lp_dt, osc, osclen);
875
876         if (mdclen > 0) {
877                 LASSERT(mdclen == (strlen(mdc) + 1));
878                 OBD_ALLOC(lprof->lp_md, mdclen);
879                 if (lprof->lp_md == NULL)
880                         GOTO(out, err = -ENOMEM);
881                 memcpy(lprof->lp_md, mdc, mdclen);
882         }
883
884         cfs_list_add(&lprof->lp_list, &lustre_profile_list);
885         RETURN(err);
886
887 out:
888         if (lprof->lp_md)
889                 OBD_FREE(lprof->lp_md, mdclen);
890         if (lprof->lp_dt)
891                 OBD_FREE(lprof->lp_dt, osclen);
892         if (lprof->lp_profile)
893                 OBD_FREE(lprof->lp_profile, proflen);
894         OBD_FREE(lprof, sizeof(*lprof));
895         RETURN(err);
896 }
897
898 void class_del_profile(const char *prof)
899 {
900         struct lustre_profile *lprof;
901         ENTRY;
902
903         CDEBUG(D_CONFIG, "Del profile %s\n", prof);
904
905         lprof = class_get_profile(prof);
906         if (lprof) {
907                 cfs_list_del(&lprof->lp_list);
908                 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
909                 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
910                 if (lprof->lp_md)
911                         OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
912                 OBD_FREE(lprof, sizeof *lprof);
913         }
914         EXIT;
915 }
916 EXPORT_SYMBOL(class_del_profile);
917
918 /* COMPAT_146 */
919 void class_del_profiles(void)
920 {
921         struct lustre_profile *lprof, *n;
922         ENTRY;
923
924         cfs_list_for_each_entry_safe(lprof, n, &lustre_profile_list, lp_list) {
925                 cfs_list_del(&lprof->lp_list);
926                 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
927                 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
928                 if (lprof->lp_md)
929                         OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
930                 OBD_FREE(lprof, sizeof *lprof);
931         }
932         EXIT;
933 }
934 EXPORT_SYMBOL(class_del_profiles);
935
936 static int class_set_global(char *ptr, int val, struct lustre_cfg *lcfg)
937 {
938         ENTRY;
939         if (class_match_param(ptr, PARAM_AT_MIN, NULL) == 0)
940                 at_min = val;
941         else if (class_match_param(ptr, PARAM_AT_MAX, NULL) == 0)
942                 at_max = val;
943         else if (class_match_param(ptr, PARAM_AT_EXTRA, NULL) == 0)
944                 at_extra = val;
945         else if (class_match_param(ptr, PARAM_AT_EARLY_MARGIN, NULL) == 0)
946                 at_early_margin = val;
947         else if (class_match_param(ptr, PARAM_AT_HISTORY, NULL) == 0)
948                 at_history = val;
949         else if (class_match_param(ptr, PARAM_JOBID_VAR, NULL) == 0)
950                 strlcpy(obd_jobid_var, lustre_cfg_string(lcfg, 2),
951                         JOBSTATS_JOBID_VAR_MAX_LEN + 1);
952         else
953                 RETURN(-EINVAL);
954
955         CDEBUG(D_IOCTL, "global %s = %d\n", ptr, val);
956         RETURN(0);
957 }
958
959
960 /* We can't call ll_process_config or lquota_process_config directly because
961  * it lives in a module that must be loaded after this one. */
962 static int (*client_process_config)(struct lustre_cfg *lcfg) = NULL;
963 static int (*quota_process_config)(struct lustre_cfg *lcfg) = NULL;
964
965 void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg))
966 {
967         client_process_config = cpc;
968 }
969 EXPORT_SYMBOL(lustre_register_client_process_config);
970
971 /**
972  * Rename the proc parameter in \a cfg with a new name \a new_name.
973  *
974  * \param cfg      config structure which contains the proc parameter
975  * \param new_name new name of the proc parameter
976  *
977  * \retval valid-pointer    pointer to the newly-allocated config structure
978  *                          which contains the renamed proc parameter
979  * \retval ERR_PTR(-EINVAL) if \a cfg or \a new_name is NULL, or \a cfg does
980  *                          not contain a proc parameter
981  * \retval ERR_PTR(-ENOMEM) if memory allocation failure occurs
982  */
983 struct lustre_cfg *lustre_cfg_rename(struct lustre_cfg *cfg,
984                                      const char *new_name)
985 {
986         struct lustre_cfg_bufs  *bufs = NULL;
987         struct lustre_cfg       *new_cfg = NULL;
988         char                    *param = NULL;
989         char                    *new_param = NULL;
990         char                    *value = NULL;
991         int                      name_len = 0;
992         int                      new_len = 0;
993         ENTRY;
994
995         if (cfg == NULL || new_name == NULL)
996                 RETURN(ERR_PTR(-EINVAL));
997
998         param = lustre_cfg_string(cfg, 1);
999         if (param == NULL)
1000                 RETURN(ERR_PTR(-EINVAL));
1001
1002         value = strchr(param, '=');
1003         if (value == NULL)
1004                 name_len = strlen(param);
1005         else
1006                 name_len = value - param;
1007
1008         new_len = LUSTRE_CFG_BUFLEN(cfg, 1) + strlen(new_name) - name_len;
1009
1010         OBD_ALLOC(new_param, new_len);
1011         if (new_param == NULL)
1012                 RETURN(ERR_PTR(-ENOMEM));
1013
1014         strcpy(new_param, new_name);
1015         if (value != NULL)
1016                 strcat(new_param, value);
1017
1018         OBD_ALLOC_PTR(bufs);
1019         if (bufs == NULL) {
1020                 OBD_FREE(new_param, new_len);
1021                 RETURN(ERR_PTR(-ENOMEM));
1022         }
1023
1024         lustre_cfg_bufs_reset(bufs, NULL);
1025         lustre_cfg_bufs_init(bufs, cfg);
1026         lustre_cfg_bufs_set_string(bufs, 1, new_param);
1027
1028         new_cfg = lustre_cfg_new(cfg->lcfg_command, bufs);
1029
1030         OBD_FREE(new_param, new_len);
1031         OBD_FREE_PTR(bufs);
1032         if (new_cfg == NULL)
1033                 RETURN(ERR_PTR(-ENOMEM));
1034
1035         new_cfg->lcfg_num = cfg->lcfg_num;
1036         new_cfg->lcfg_flags = cfg->lcfg_flags;
1037         new_cfg->lcfg_nid = cfg->lcfg_nid;
1038         new_cfg->lcfg_nal = cfg->lcfg_nal;
1039
1040         RETURN(new_cfg);
1041 }
1042 EXPORT_SYMBOL(lustre_cfg_rename);
1043
1044 static int process_param2_config(struct lustre_cfg *lcfg)
1045 {
1046         char *param = lustre_cfg_string(lcfg, 1);
1047         char *upcall = lustre_cfg_string(lcfg, 2);
1048         char *argv[] = {
1049                 [0] = "/usr/sbin/lctl",
1050                 [1] = "set_param",
1051                 [2] = param,
1052                 [3] = NULL
1053         };
1054         struct timeval  start;
1055         struct timeval  end;
1056         int             rc;
1057         ENTRY;
1058
1059         /* Add upcall processing here. Now only lctl is supported */
1060         if (strcmp(upcall, LCTL_UPCALL) != 0) {
1061                 CERROR("Unsupported upcall %s\n", upcall);
1062                 RETURN(-EINVAL);
1063         }
1064
1065         do_gettimeofday(&start);
1066         rc = call_usermodehelper(argv[0], argv, NULL, 0);
1067         do_gettimeofday(&end);
1068
1069         if (rc < 0) {
1070                 CERROR("lctl: error invoking upcall %s %s %s: rc = %d; "
1071                        "time %ldus\n", argv[0], argv[1], argv[2], rc,
1072                        cfs_timeval_sub(&end, &start, NULL));
1073         } else {
1074                 CDEBUG(D_HA, "lctl: invoked upcall %s %s %s, time %ldus\n",
1075                        argv[0], argv[1], argv[2],
1076                        cfs_timeval_sub(&end, &start, NULL));
1077                        rc = 0;
1078         }
1079
1080         RETURN(rc);
1081 }
1082
1083 void lustre_register_quota_process_config(int (*qpc)(struct lustre_cfg *lcfg))
1084 {
1085         quota_process_config = qpc;
1086 }
1087 EXPORT_SYMBOL(lustre_register_quota_process_config);
1088
1089 /** Process configuration commands given in lustre_cfg form.
1090  * These may come from direct calls (e.g. class_manual_cleanup)
1091  * or processing the config llog, or ioctl from lctl.
1092  */
1093 int class_process_config(struct lustre_cfg *lcfg)
1094 {
1095         struct obd_device *obd;
1096         int err;
1097
1098         LASSERT(lcfg && !IS_ERR(lcfg));
1099         CDEBUG(D_IOCTL, "processing cmd: %x\n", lcfg->lcfg_command);
1100
1101         /* Commands that don't need a device */
1102         switch(lcfg->lcfg_command) {
1103         case LCFG_ATTACH: {
1104                 err = class_attach(lcfg);
1105                 GOTO(out, err);
1106         }
1107         case LCFG_ADD_UUID: {
1108                 CDEBUG(D_IOCTL, "adding mapping from uuid %s to nid "LPX64
1109                        " (%s)\n", lustre_cfg_string(lcfg, 1),
1110                        lcfg->lcfg_nid, libcfs_nid2str(lcfg->lcfg_nid));
1111
1112                 err = class_add_uuid(lustre_cfg_string(lcfg, 1), lcfg->lcfg_nid);
1113                 GOTO(out, err);
1114         }
1115         case LCFG_DEL_UUID: {
1116                 CDEBUG(D_IOCTL, "removing mappings for uuid %s\n",
1117                        (lcfg->lcfg_bufcount < 2 || LUSTRE_CFG_BUFLEN(lcfg, 1) == 0)
1118                        ? "<all uuids>" : lustre_cfg_string(lcfg, 1));
1119
1120                 err = class_del_uuid(lustre_cfg_string(lcfg, 1));
1121                 GOTO(out, err);
1122         }
1123         case LCFG_MOUNTOPT: {
1124                 CDEBUG(D_IOCTL, "mountopt: profile %s osc %s mdc %s\n",
1125                        lustre_cfg_string(lcfg, 1),
1126                        lustre_cfg_string(lcfg, 2),
1127                        lustre_cfg_string(lcfg, 3));
1128                 /* set these mount options somewhere, so ll_fill_super
1129                  * can find them. */
1130                 err = class_add_profile(LUSTRE_CFG_BUFLEN(lcfg, 1),
1131                                         lustre_cfg_string(lcfg, 1),
1132                                         LUSTRE_CFG_BUFLEN(lcfg, 2),
1133                                         lustre_cfg_string(lcfg, 2),
1134                                         LUSTRE_CFG_BUFLEN(lcfg, 3),
1135                                         lustre_cfg_string(lcfg, 3));
1136                 GOTO(out, err);
1137         }
1138         case LCFG_DEL_MOUNTOPT: {
1139                 CDEBUG(D_IOCTL, "mountopt: profile %s\n",
1140                        lustre_cfg_string(lcfg, 1));
1141                 class_del_profile(lustre_cfg_string(lcfg, 1));
1142                 GOTO(out, err = 0);
1143         }
1144         case LCFG_SET_TIMEOUT: {
1145                 CDEBUG(D_IOCTL, "changing lustre timeout from %d to %d\n",
1146                        obd_timeout, lcfg->lcfg_num);
1147                 obd_timeout = max(lcfg->lcfg_num, 1U);
1148                 obd_timeout_set = 1;
1149                 GOTO(out, err = 0);
1150         }
1151         case LCFG_SET_LDLM_TIMEOUT: {
1152                 CDEBUG(D_IOCTL, "changing lustre ldlm_timeout from %d to %d\n",
1153                        ldlm_timeout, lcfg->lcfg_num);
1154                 ldlm_timeout = max(lcfg->lcfg_num, 1U);
1155                 if (ldlm_timeout >= obd_timeout)
1156                         ldlm_timeout = max(obd_timeout / 3, 1U);
1157                 ldlm_timeout_set = 1;
1158                 GOTO(out, err = 0);
1159         }
1160         case LCFG_SET_UPCALL: {
1161                 LCONSOLE_ERROR_MSG(0x15a, "recovery upcall is deprecated\n");
1162                 /* COMPAT_146 Don't fail on old configs */
1163                 GOTO(out, err = 0);
1164         }
1165         case LCFG_MARKER: {
1166                 struct cfg_marker *marker;
1167                 marker = lustre_cfg_buf(lcfg, 1);
1168                 CDEBUG(D_IOCTL, "marker %d (%#x) %.16s %s\n", marker->cm_step,
1169                        marker->cm_flags, marker->cm_tgtname, marker->cm_comment);
1170                 GOTO(out, err = 0);
1171         }
1172         case LCFG_PARAM: {
1173                 char *tmp;
1174                 /* llite has no obd */
1175                 if ((class_match_param(lustre_cfg_string(lcfg, 1),
1176                                        PARAM_LLITE, 0) == 0) &&
1177                     client_process_config) {
1178                         err = (*client_process_config)(lcfg);
1179                         GOTO(out, err);
1180                 } else if ((class_match_param(lustre_cfg_string(lcfg, 1),
1181                                               PARAM_SYS, &tmp) == 0)) {
1182                         /* Global param settings */
1183                         err = class_set_global(tmp, lcfg->lcfg_num, lcfg);
1184                         /*
1185                          * Client or server should not fail to mount if
1186                          * it hits an unknown configuration parameter.
1187                          */
1188                         if (err != 0)
1189                                 CWARN("Ignoring unknown param %s\n", tmp);
1190
1191                         GOTO(out, err = 0);
1192                 } else if ((class_match_param(lustre_cfg_string(lcfg, 1),
1193                                               PARAM_QUOTA, &tmp) == 0) &&
1194                            quota_process_config) {
1195                         err = (*quota_process_config)(lcfg);
1196                         GOTO(out, err);
1197                 }
1198
1199                 break;
1200         }
1201         case LCFG_SET_PARAM: {
1202                 err = process_param2_config(lcfg);
1203                 GOTO(out, err = 0);
1204         }
1205         }
1206         /* Commands that require a device */
1207         obd = class_name2obd(lustre_cfg_string(lcfg, 0));
1208         if (obd == NULL) {
1209                 if (!LUSTRE_CFG_BUFLEN(lcfg, 0))
1210                         CERROR("this lcfg command requires a device name\n");
1211                 else
1212                         CERROR("no device for: %s\n",
1213                                lustre_cfg_string(lcfg, 0));
1214
1215                 GOTO(out, err = -EINVAL);
1216         }
1217
1218         switch(lcfg->lcfg_command) {
1219         case LCFG_SETUP: {
1220                 err = class_setup(obd, lcfg);
1221                 GOTO(out, err);
1222         }
1223         case LCFG_DETACH: {
1224                 err = class_detach(obd, lcfg);
1225                 GOTO(out, err = 0);
1226         }
1227         case LCFG_CLEANUP: {
1228                 err = class_cleanup(obd, lcfg);
1229                 GOTO(out, err = 0);
1230         }
1231         case LCFG_ADD_CONN: {
1232                 err = class_add_conn(obd, lcfg);
1233                 GOTO(out, err = 0);
1234         }
1235         case LCFG_DEL_CONN: {
1236                 err = class_del_conn(obd, lcfg);
1237                 GOTO(out, err = 0);
1238         }
1239         case LCFG_POOL_NEW: {
1240                 err = obd_pool_new(obd, lustre_cfg_string(lcfg, 2));
1241                 GOTO(out, err = 0);
1242         }
1243         case LCFG_POOL_ADD: {
1244                 err = obd_pool_add(obd, lustre_cfg_string(lcfg, 2),
1245                                    lustre_cfg_string(lcfg, 3));
1246                 GOTO(out, err = 0);
1247         }
1248         case LCFG_POOL_REM: {
1249                 err = obd_pool_rem(obd, lustre_cfg_string(lcfg, 2),
1250                                    lustre_cfg_string(lcfg, 3));
1251                 GOTO(out, err = 0);
1252         }
1253         case LCFG_POOL_DEL: {
1254                 err = obd_pool_del(obd, lustre_cfg_string(lcfg, 2));
1255                 GOTO(out, err = 0);
1256         }
1257         default: {
1258                 err = obd_process_config(obd, sizeof(*lcfg), lcfg);
1259                 GOTO(out, err);
1260
1261         }
1262         }
1263 out:
1264         if ((err < 0) && !(lcfg->lcfg_command & LCFG_REQUIRED)) {
1265                 CWARN("Ignoring error %d on optional command %#x\n", err,
1266                       lcfg->lcfg_command);
1267                 err = 0;
1268         }
1269         return err;
1270 }
1271 EXPORT_SYMBOL(class_process_config);
1272
1273 #ifndef HAVE_ONLY_PROCFS_SEQ
1274 int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
1275                              struct lustre_cfg *lcfg, void *data)
1276 {
1277 #ifdef __KERNEL__
1278         struct lprocfs_vars *var;
1279         char *key, *sval;
1280         int i, keylen, vallen;
1281         int matched = 0, j = 0;
1282         int rc = 0;
1283         int skip = 0;
1284         ENTRY;
1285
1286         if (lcfg->lcfg_command != LCFG_PARAM) {
1287                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1288                 RETURN(-EINVAL);
1289         }
1290
1291         /* e.g. tunefs.lustre --param mdt.group_upcall=foo /r/tmp/lustre-mdt
1292            or   lctl conf_param lustre-MDT0000.mdt.group_upcall=bar
1293            or   lctl conf_param lustre-OST0000.osc.max_dirty_mb=36 */
1294         for (i = 1; i < lcfg->lcfg_bufcount; i++) {
1295                 key = lustre_cfg_buf(lcfg, i);
1296                 /* Strip off prefix */
1297                 if (class_match_param(key, prefix, &key))
1298                         /* If the prefix doesn't match, return error so we
1299                          * can pass it down the stack */
1300                         RETURN(-ENOSYS);
1301                 sval = strchr(key, '=');
1302                 if (!sval || (*(sval + 1) == 0)) {
1303                         CERROR("Can't parse param %s (missing '=')\n", key);
1304                         /* rc = -EINVAL;        continue parsing other params */
1305                         continue;
1306                 }
1307                 keylen = sval - key;
1308                 sval++;
1309                 vallen = strlen(sval);
1310                 matched = 0;
1311                 j = 0;
1312                 /* Search proc entries */
1313                 while (lvars[j].name) {
1314                         var = &lvars[j];
1315                         if (class_match_param(key, (char *)var->name, 0) == 0 &&
1316                             keylen == strlen(var->name)) {
1317                                 matched++;
1318                                 rc = -EROFS;
1319
1320                                 if (var->write_fptr) {
1321                                         mm_segment_t oldfs;
1322                                         oldfs = get_fs();
1323                                         set_fs(KERNEL_DS);
1324                                         rc = (var->write_fptr)(NULL, sval,
1325                                                                 vallen, data);
1326                                         set_fs(oldfs);
1327                                 }
1328                                 break;
1329                         }
1330                         j++;
1331                 }
1332                 if (!matched) {
1333                         CERROR("%.*s: %s unknown param %s\n",
1334                                (int)strlen(prefix) - 1, prefix,
1335                                (char *)lustre_cfg_string(lcfg, 0), key);
1336                         /* rc = -EINVAL;        continue parsing other params */
1337                         skip++;
1338                 } else if (rc < 0) {
1339                         CERROR("%s: error writing proc entry '%s': rc = %d\n",
1340                                prefix, var->name, rc);
1341                         rc = 0;
1342                 } else {
1343                         CDEBUG(D_CONFIG, "%s.%.*s: Set parameter %.*s=%s\n",
1344                                          lustre_cfg_string(lcfg, 0),
1345                                          (int)strlen(prefix) - 1, prefix,
1346                                          (int)(sval - key - 1), key, sval);
1347                 }
1348         }
1349
1350         if (rc > 0)
1351                 rc = 0;
1352         if (!rc && skip)
1353                 rc = skip;
1354         RETURN(rc);
1355 #else
1356         CDEBUG(D_CONFIG, "liblustre can't process params.\n");
1357         /* Don't throw config error */
1358         RETURN(0);
1359 #endif
1360 }
1361 EXPORT_SYMBOL(class_process_proc_param);
1362 #endif
1363
1364 int class_process_proc_seq_param(char *prefix, struct lprocfs_seq_vars *lvars,
1365                                  struct lustre_cfg *lcfg, void *data)
1366 {
1367 #ifdef __KERNEL__
1368         struct lprocfs_seq_vars *var;
1369         struct file fakefile;
1370         struct seq_file fake_seqfile;
1371         char *key, *sval;
1372         int i, keylen, vallen;
1373         int matched = 0, j = 0;
1374         int rc = 0;
1375         int skip = 0;
1376         ENTRY;
1377
1378         if (lcfg->lcfg_command != LCFG_PARAM) {
1379                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1380                 RETURN(-EINVAL);
1381         }
1382
1383         /* fake a seq file so that var->fops->write can work... */
1384         fakefile.private_data = &fake_seqfile;
1385         fake_seqfile.private = data;
1386         /* e.g. tunefs.lustre --param mdt.group_upcall=foo /r/tmp/lustre-mdt
1387            or   lctl conf_param lustre-MDT0000.mdt.group_upcall=bar
1388            or   lctl conf_param lustre-OST0000.osc.max_dirty_mb=36 */
1389         for (i = 1; i < lcfg->lcfg_bufcount; i++) {
1390                 key = lustre_cfg_buf(lcfg, i);
1391                 /* Strip off prefix */
1392                 if (class_match_param(key, prefix, &key))
1393                         /* If the prefix doesn't match, return error so we
1394                          * can pass it down the stack */
1395                         RETURN(-ENOSYS);
1396                 sval = strchr(key, '=');
1397                 if (!sval || (*(sval + 1) == 0)) {
1398                         CERROR("Can't parse param %s (missing '=')\n", key);
1399                         /* rc = -EINVAL;        continue parsing other params */
1400                         continue;
1401                 }
1402                 keylen = sval - key;
1403                 sval++;
1404                 vallen = strlen(sval);
1405                 matched = 0;
1406                 j = 0;
1407                 /* Search proc entries */
1408                 while (lvars[j].name) {
1409                         var = &lvars[j];
1410                         if (class_match_param(key, (char *)var->name, 0) == 0 &&
1411                             keylen == strlen(var->name)) {
1412                                 matched++;
1413                                 rc = -EROFS;
1414
1415                                 if (var->fops && var->fops->write) {
1416                                         mm_segment_t oldfs;
1417                                         oldfs = get_fs();
1418                                         set_fs(KERNEL_DS);
1419                                         rc = (var->fops->write)(&fakefile, sval,
1420                                                                 vallen, NULL);
1421                                         set_fs(oldfs);
1422                                 }
1423                                 break;
1424                         }
1425                         j++;
1426                 }
1427                 if (!matched) {
1428                         CERROR("%.*s: %s unknown param %s\n",
1429                                (int)strlen(prefix) - 1, prefix,
1430                                (char *)lustre_cfg_string(lcfg, 0), key);
1431                         /* rc = -EINVAL;        continue parsing other params */
1432                         skip++;
1433                 } else if (rc < 0) {
1434                         CERROR("%s: error writing proc entry '%s': rc = %d\n",
1435                                prefix, var->name, rc);
1436                         rc = 0;
1437                 } else {
1438                         CDEBUG(D_CONFIG, "%s.%.*s: Set parameter %.*s=%s\n",
1439                                          lustre_cfg_string(lcfg, 0),
1440                                          (int)strlen(prefix) - 1, prefix,
1441                                          (int)(sval - key - 1), key, sval);
1442                 }
1443         }
1444
1445         if (rc > 0)
1446                 rc = 0;
1447         if (!rc && skip)
1448                 rc = skip;
1449         RETURN(rc);
1450 #else
1451         CDEBUG(D_CONFIG, "liblustre can't process params.\n");
1452         /* Don't throw config error */
1453         RETURN(0);
1454 #endif
1455 }
1456 EXPORT_SYMBOL(class_process_proc_seq_param);
1457
1458 #ifdef __KERNEL__
1459 extern int lustre_check_exclusion(struct super_block *sb, char *svname);
1460 #else
1461 #define lustre_check_exclusion(a,b)  0
1462 #endif
1463
1464 /*
1465  * Supplemental functions for config logs, it allocates lustre_cfg
1466  * buffers plus initialized llog record header at the beginning.
1467  */
1468 struct llog_cfg_rec *lustre_cfg_rec_new(int cmd, struct lustre_cfg_bufs *bufs)
1469 {
1470         struct llog_cfg_rec     *lcr;
1471         int                      reclen;
1472
1473         ENTRY;
1474
1475         reclen = lustre_cfg_len(bufs->lcfg_bufcount, bufs->lcfg_buflen);
1476         reclen = llog_data_len(reclen) + sizeof(struct llog_rec_hdr) +
1477                  sizeof(struct llog_rec_tail);
1478
1479         OBD_ALLOC(lcr, reclen);
1480         if (lcr == NULL)
1481                 RETURN(NULL);
1482
1483         lustre_cfg_init(&lcr->lcr_cfg, cmd, bufs);
1484
1485         lcr->lcr_hdr.lrh_len = reclen;
1486         lcr->lcr_hdr.lrh_type = OBD_CFG_REC;
1487
1488         RETURN(lcr);
1489 }
1490 EXPORT_SYMBOL(lustre_cfg_rec_new);
1491
1492 void lustre_cfg_rec_free(struct llog_cfg_rec *lcr)
1493 {
1494         ENTRY;
1495         OBD_FREE(lcr, lcr->lcr_hdr.lrh_len);
1496         EXIT;
1497 }
1498 EXPORT_SYMBOL(lustre_cfg_rec_free);
1499
1500 /** Parse a configuration llog, doing various manipulations on them
1501  * for various reasons, (modifications for compatibility, skip obsolete
1502  * records, change uuids, etc), then class_process_config() resulting
1503  * net records.
1504  */
1505 int class_config_llog_handler(const struct lu_env *env,
1506                               struct llog_handle *handle,
1507                               struct llog_rec_hdr *rec, void *data)
1508 {
1509         struct config_llog_instance *clli = data;
1510         int cfg_len = rec->lrh_len;
1511         char *cfg_buf = (char*) (rec + 1);
1512         int rc = 0;
1513         ENTRY;
1514
1515         //class_config_dump_handler(handle, rec, data);
1516
1517         switch (rec->lrh_type) {
1518         case OBD_CFG_REC: {
1519                 struct lustre_cfg *lcfg, *lcfg_new;
1520                 struct lustre_cfg_bufs bufs;
1521                 char *inst_name = NULL;
1522                 int inst_len = 0;
1523                 int inst = 0, swab = 0;
1524
1525                 lcfg = (struct lustre_cfg *)cfg_buf;
1526                 if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION)) {
1527                         lustre_swab_lustre_cfg(lcfg);
1528                         swab = 1;
1529                 }
1530
1531                 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1532                 if (rc)
1533                         GOTO(out, rc);
1534
1535                 /* Figure out config state info */
1536                 if (lcfg->lcfg_command == LCFG_MARKER) {
1537                         struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1538                         lustre_swab_cfg_marker(marker, swab,
1539                                                LUSTRE_CFG_BUFLEN(lcfg, 1));
1540                         CDEBUG(D_CONFIG, "Marker, inst_flg=%#x mark_flg=%#x\n",
1541                                clli->cfg_flags, marker->cm_flags);
1542                         if (marker->cm_flags & CM_START) {
1543                                 /* all previous flags off */
1544                                 clli->cfg_flags = CFG_F_MARKER;
1545                                 server_name2index(marker->cm_tgtname,
1546                                                   &clli->cfg_lwp_idx, NULL);
1547                                 if (marker->cm_flags & CM_SKIP) {
1548                                         clli->cfg_flags |= CFG_F_SKIP;
1549                                         CDEBUG(D_CONFIG, "SKIP #%d\n",
1550                                                marker->cm_step);
1551                                 } else if ((marker->cm_flags & CM_EXCLUDE) ||
1552                                            (clli->cfg_sb &&
1553                                             lustre_check_exclusion(clli->cfg_sb,
1554                                                          marker->cm_tgtname))) {
1555                                         clli->cfg_flags |= CFG_F_EXCLUDE;
1556                                         CDEBUG(D_CONFIG, "EXCLUDE %d\n",
1557                                                marker->cm_step);
1558                                 }
1559                         } else if (marker->cm_flags & CM_END) {
1560                                 clli->cfg_flags = 0;
1561                         }
1562                 }
1563                 /* A config command without a start marker before it is
1564                    illegal (post 146) */
1565                 if (!(clli->cfg_flags & CFG_F_COMPAT146) &&
1566                     !(clli->cfg_flags & CFG_F_MARKER) &&
1567                     (lcfg->lcfg_command != LCFG_MARKER)) {
1568                         CWARN("Config not inside markers, ignoring! "
1569                               "(inst: %p, uuid: %s, flags: %#x)\n",
1570                               clli->cfg_instance,
1571                               clli->cfg_uuid.uuid, clli->cfg_flags);
1572                         clli->cfg_flags |= CFG_F_SKIP;
1573                 }
1574                 if (clli->cfg_flags & CFG_F_SKIP) {
1575                         CDEBUG(D_CONFIG, "skipping %#x\n",
1576                                clli->cfg_flags);
1577                         rc = 0;
1578                         /* No processing! */
1579                         break;
1580                 }
1581
1582                 /*
1583                  * For interoperability between 1.8 and 2.0,
1584                  * rename "mds" obd device type to "mdt".
1585                  */
1586                 {
1587                         char *typename = lustre_cfg_string(lcfg, 1);
1588                         char *index = lustre_cfg_string(lcfg, 2);
1589
1590                         if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
1591                              strcmp(typename, "mds") == 0)) {
1592                                 CWARN("For 1.8 interoperability, rename obd "
1593                                        "type from mds to mdt\n");
1594                                 typename[2] = 't';
1595                         }
1596                         if ((lcfg->lcfg_command == LCFG_SETUP && index &&
1597                              strcmp(index, "type") == 0)) {
1598                                 CDEBUG(D_INFO, "For 1.8 interoperability, "
1599                                        "set this index to '0'\n");
1600                                 index[0] = '0';
1601                                 index[1] = 0;
1602                         }
1603                 }
1604
1605 #if defined(HAVE_SERVER_SUPPORT) && defined(__KERNEL__)
1606                 /* newer MDS replaces LOV/OSC with LOD/OSP */
1607                 {
1608                         char *typename = lustre_cfg_string(lcfg, 1);
1609
1610                         if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
1611                             strcmp(typename, LUSTRE_LOV_NAME) == 0) &&
1612                             IS_MDT(s2lsi(clli->cfg_sb))) {
1613                                 CDEBUG(D_CONFIG,
1614                                        "For 2.x interoperability, rename obd "
1615                                        "type from lov to lod (%s)\n",
1616                                        s2lsi(clli->cfg_sb)->lsi_svname);
1617                                 strcpy(typename, LUSTRE_LOD_NAME);
1618                         }
1619                         if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
1620                             strcmp(typename, LUSTRE_OSC_NAME) == 0) &&
1621                             IS_MDT(s2lsi(clli->cfg_sb))) {
1622                                 CDEBUG(D_CONFIG,
1623                                        "For 2.x interoperability, rename obd "
1624                                        "type from osc to osp (%s)\n",
1625                                        s2lsi(clli->cfg_sb)->lsi_svname);
1626                                 strcpy(typename, LUSTRE_OSP_NAME);
1627                         }
1628                 }
1629 #endif
1630
1631                 if (clli->cfg_flags & CFG_F_EXCLUDE) {
1632                         CDEBUG(D_CONFIG, "cmd: %x marked EXCLUDED\n",
1633                                lcfg->lcfg_command);
1634                         if (lcfg->lcfg_command == LCFG_LOV_ADD_OBD)
1635                                 /* Add inactive instead */
1636                                 lcfg->lcfg_command = LCFG_LOV_ADD_INA;
1637                 }
1638
1639                 lustre_cfg_bufs_init(&bufs, lcfg);
1640
1641                 if (clli && clli->cfg_instance &&
1642                     LUSTRE_CFG_BUFLEN(lcfg, 0) > 0){
1643                         inst = 1;
1644                         inst_len = LUSTRE_CFG_BUFLEN(lcfg, 0) +
1645                                    sizeof(clli->cfg_instance) * 2 + 4;
1646                         OBD_ALLOC(inst_name, inst_len);
1647                         if (inst_name == NULL)
1648                                 GOTO(out, rc = -ENOMEM);
1649                         sprintf(inst_name, "%s-%p",
1650                                 lustre_cfg_string(lcfg, 0),
1651                                 clli->cfg_instance);
1652                         lustre_cfg_bufs_set_string(&bufs, 0, inst_name);
1653                         CDEBUG(D_CONFIG, "cmd %x, instance name: %s\n",
1654                                lcfg->lcfg_command, inst_name);
1655                 }
1656
1657                 /* we override the llog's uuid for clients, to insure they
1658                 are unique */
1659                 if (clli && clli->cfg_instance != NULL &&
1660                     lcfg->lcfg_command == LCFG_ATTACH) {
1661                         lustre_cfg_bufs_set_string(&bufs, 2,
1662                                                    clli->cfg_uuid.uuid);
1663                 }
1664                 /*
1665                  * sptlrpc config record, we expect 2 data segments:
1666                  *  [0]: fs_name/target_name,
1667                  *  [1]: rule string
1668                  * moving them to index [1] and [2], and insert MGC's
1669                  * obdname at index [0].
1670                  */
1671                 if (clli && clli->cfg_instance == NULL &&
1672                     lcfg->lcfg_command == LCFG_SPTLRPC_CONF) {
1673                         lustre_cfg_bufs_set(&bufs, 2, bufs.lcfg_buf[1],
1674                                             bufs.lcfg_buflen[1]);
1675                         lustre_cfg_bufs_set(&bufs, 1, bufs.lcfg_buf[0],
1676                                             bufs.lcfg_buflen[0]);
1677                         lustre_cfg_bufs_set_string(&bufs, 0,
1678                                                    clli->cfg_obdname);
1679                 }
1680
1681                 lcfg_new = lustre_cfg_new(lcfg->lcfg_command, &bufs);
1682                 if (lcfg_new == NULL)
1683                         GOTO(out, rc = -ENOMEM);
1684
1685                 lcfg_new->lcfg_num   = lcfg->lcfg_num;
1686                 lcfg_new->lcfg_flags = lcfg->lcfg_flags;
1687
1688                 /* XXX Hack to try to remain binary compatible with
1689                  * pre-newconfig logs */
1690                 if (lcfg->lcfg_nal != 0 &&      /* pre-newconfig log? */
1691                     (lcfg->lcfg_nid >> 32) == 0) {
1692                         __u32 addr = (__u32)(lcfg->lcfg_nid & 0xffffffff);
1693
1694                         lcfg_new->lcfg_nid =
1695                                 LNET_MKNID(LNET_MKNET(lcfg->lcfg_nal, 0), addr);
1696                         CWARN("Converted pre-newconfig NAL %d NID %x to %s\n",
1697                               lcfg->lcfg_nal, addr,
1698                               libcfs_nid2str(lcfg_new->lcfg_nid));
1699                 } else {
1700                         lcfg_new->lcfg_nid = lcfg->lcfg_nid;
1701                 }
1702
1703                 lcfg_new->lcfg_nal = 0; /* illegal value for obsolete field */
1704
1705                 rc = class_process_config(lcfg_new);
1706                 lustre_cfg_free(lcfg_new);
1707
1708                 if (inst)
1709                         OBD_FREE(inst_name, inst_len);
1710                 break;
1711         }
1712         default:
1713                 CERROR("Unknown llog record type %#x encountered\n",
1714                        rec->lrh_type);
1715                 break;
1716         }
1717 out:
1718         if (rc) {
1719                 CERROR("%s: cfg command failed: rc = %d\n",
1720                        handle->lgh_ctxt->loc_obd->obd_name, rc);
1721                 class_config_dump_handler(NULL, handle, rec, data);
1722         }
1723         RETURN(rc);
1724 }
1725 EXPORT_SYMBOL(class_config_llog_handler);
1726
1727 int class_config_parse_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
1728                             char *name, struct config_llog_instance *cfg)
1729 {
1730         struct llog_process_cat_data     cd = {0, 0};
1731         struct llog_handle              *llh;
1732         llog_cb_t                        callback;
1733         int                              rc;
1734         ENTRY;
1735
1736         CDEBUG(D_INFO, "looking up llog %s\n", name);
1737         rc = llog_open(env, ctxt, &llh, NULL, name, LLOG_OPEN_EXISTS);
1738         if (rc)
1739                 RETURN(rc);
1740
1741         rc = llog_init_handle(env, llh, LLOG_F_IS_PLAIN, NULL);
1742         if (rc)
1743                 GOTO(parse_out, rc);
1744
1745         /* continue processing from where we last stopped to end-of-log */
1746         if (cfg) {
1747                 cd.lpcd_first_idx = cfg->cfg_last_idx;
1748                 callback = cfg->cfg_callback;
1749                 LASSERT(callback != NULL);
1750         } else {
1751                 callback = class_config_llog_handler;
1752         }
1753
1754         cd.lpcd_last_idx = 0;
1755
1756         rc = llog_process(env, llh, callback, cfg, &cd);
1757
1758         CDEBUG(D_CONFIG, "Processed log %s gen %d-%d (rc=%d)\n", name,
1759                cd.lpcd_first_idx + 1, cd.lpcd_last_idx, rc);
1760         if (cfg)
1761                 cfg->cfg_last_idx = cd.lpcd_last_idx;
1762
1763 parse_out:
1764         llog_close(env, llh);
1765         RETURN(rc);
1766 }
1767 EXPORT_SYMBOL(class_config_parse_llog);
1768
1769 struct lcfg_type_data {
1770         __u32    ltd_type;
1771         char    *ltd_name;
1772         char    *ltd_bufs[4];
1773 } lcfg_data_table[] = {
1774         { LCFG_ATTACH, "attach", { "type", "UUID", "3", "4" } },
1775         { LCFG_DETACH, "detach", { "1", "2", "3", "4" } },
1776         { LCFG_SETUP, "setup", { "UUID", "node", "options", "failout" } },
1777         { LCFG_CLEANUP, "cleanup", { "1", "2", "3", "4" } },
1778         { LCFG_ADD_UUID, "add_uuid", { "node", "2", "3", "4" }  },
1779         { LCFG_DEL_UUID, "del_uuid", { "1", "2", "3", "4" }  },
1780         { LCFG_MOUNTOPT, "new_profile", { "name", "lov", "lmv", "4" }  },
1781         { LCFG_DEL_MOUNTOPT, "del_mountopt", { "1", "2", "3", "4" } , },
1782         { LCFG_SET_TIMEOUT, "set_timeout", { "parameter", "2", "3", "4" }  },
1783         { LCFG_SET_UPCALL, "set_upcall", { "1", "2", "3", "4" }  },
1784         { LCFG_ADD_CONN, "add_conn", { "node", "2", "3", "4" }  },
1785         { LCFG_DEL_CONN, "del_conn", { "1", "2", "3", "4" }  },
1786         { LCFG_LOV_ADD_OBD, "add_osc", { "ost", "index", "gen", "UUID" } },
1787         { LCFG_LOV_DEL_OBD, "del_osc", { "1", "2", "3", "4" } },
1788         { LCFG_PARAM, "set_param", { "parameter", "value", "3", "4" } },
1789         { LCFG_MARKER, "marker", { "1", "2", "3", "4" } },
1790         { LCFG_LOG_START, "log_start", { "1", "2", "3", "4" } },
1791         { LCFG_LOG_END, "log_end", { "1", "2", "3", "4" } },
1792         { LCFG_LOV_ADD_INA, "add_osc_inactive", { "1", "2", "3", "4" }  },
1793         { LCFG_ADD_MDC, "add_mdc", { "mdt", "index", "gen", "UUID" } },
1794         { LCFG_DEL_MDC, "del_mdc", { "1", "2", "3", "4" } },
1795         { LCFG_SPTLRPC_CONF, "security", { "parameter", "2", "3", "4" } },
1796         { LCFG_POOL_NEW, "new_pool", { "fsname", "pool", "3", "4" }  },
1797         { LCFG_POOL_ADD, "add_pool", { "fsname", "pool", "ost", "4" } },
1798         { LCFG_POOL_REM, "remove_pool", { "fsname", "pool", "ost", "4" } },
1799         { LCFG_POOL_DEL, "del_pool", { "fsname", "pool", "3", "4" } },
1800         { LCFG_SET_LDLM_TIMEOUT, "set_ldlm_timeout",
1801           { "parameter", "2", "3", "4" } },
1802         { 0, NULL, { NULL, NULL, NULL, NULL } }
1803 };
1804
1805 static struct lcfg_type_data *lcfg_cmd2data(__u32 cmd)
1806 {
1807         int i = 0;
1808
1809         while (lcfg_data_table[i].ltd_type != 0) {
1810                 if (lcfg_data_table[i].ltd_type == cmd)
1811                         return &lcfg_data_table[i];
1812                 i++;
1813         }
1814         return NULL;
1815 }
1816
1817 /**
1818  * parse config record and output dump in supplied buffer.
1819  * This is separated from class_config_dump_handler() to use
1820  * for ioctl needs as well
1821  *
1822  * Sample Output:
1823  * - { event: attach, device: lustrewt-clilov, type: lov, UUID:
1824  *     lustrewt-clilov_UUID }
1825  */
1826 int class_config_yaml_output(struct llog_rec_hdr *rec, char *buf, int size)
1827 {
1828         struct lustre_cfg       *lcfg = (struct lustre_cfg *)(rec + 1);
1829         char                    *ptr = buf;
1830         char                    *end = buf + size;
1831         int                      rc = 0, i;
1832         struct lcfg_type_data   *ldata;
1833
1834         LASSERT(rec->lrh_type == OBD_CFG_REC);
1835         rc = lustre_cfg_sanity_check(lcfg, rec->lrh_len);
1836         if (rc < 0)
1837                 return rc;
1838
1839         ldata = lcfg_cmd2data(lcfg->lcfg_command);
1840         if (ldata == NULL)
1841                 return -ENOTTY;
1842
1843         if (lcfg->lcfg_command == LCFG_MARKER)
1844                 return 0;
1845
1846         /* form YAML entity */
1847         ptr += snprintf(ptr, end - ptr, "- { event: %s", ldata->ltd_name);
1848
1849         if (lcfg->lcfg_flags)
1850                 ptr += snprintf(ptr, end - ptr, ", flags: %#08x",
1851                                 lcfg->lcfg_flags);
1852         if (lcfg->lcfg_num)
1853                 ptr += snprintf(ptr, end - ptr, ", num: %#08x",
1854                                 lcfg->lcfg_num);
1855         if (lcfg->lcfg_nid)
1856                 ptr += snprintf(ptr, end - ptr, ", nid: %s("LPX64")",
1857                                 libcfs_nid2str(lcfg->lcfg_nid),
1858                                 lcfg->lcfg_nid);
1859
1860         if (LUSTRE_CFG_BUFLEN(lcfg, 0) > 0)
1861                 ptr += snprintf(ptr, end - ptr, ", device: %s",
1862                                 lustre_cfg_string(lcfg, 0));
1863
1864         for (i = 1; i < lcfg->lcfg_bufcount; i++) {
1865                 if (LUSTRE_CFG_BUFLEN(lcfg, i) > 0)
1866                         ptr += snprintf(ptr, end - ptr, ", %s: %s",
1867                                         ldata->ltd_bufs[i - 1],
1868                                         lustre_cfg_string(lcfg, i));
1869         }
1870
1871         ptr += snprintf(ptr, end - ptr, " }\n");
1872         /* return consumed bytes */
1873         rc = ptr - buf;
1874         return rc;
1875 }
1876
1877 /**
1878  * parse config record and output dump in supplied buffer.
1879  * This is separated from class_config_dump_handler() to use
1880  * for ioctl needs as well
1881  */
1882 int class_config_parse_rec(struct llog_rec_hdr *rec, char *buf, int size)
1883 {
1884         struct lustre_cfg       *lcfg = (struct lustre_cfg *)(rec + 1);
1885         char                    *ptr = buf;
1886         char                    *end = buf + size;
1887         int                      rc = 0;
1888
1889         ENTRY;
1890
1891         LASSERT(rec->lrh_type == OBD_CFG_REC);
1892         rc = lustre_cfg_sanity_check(lcfg, rec->lrh_len);
1893         if (rc < 0)
1894                 RETURN(rc);
1895
1896         ptr += snprintf(ptr, end-ptr, "cmd=%05x ", lcfg->lcfg_command);
1897         if (lcfg->lcfg_flags)
1898                 ptr += snprintf(ptr, end-ptr, "flags=%#08x ",
1899                                 lcfg->lcfg_flags);
1900
1901         if (lcfg->lcfg_num)
1902                 ptr += snprintf(ptr, end-ptr, "num=%#08x ", lcfg->lcfg_num);
1903
1904         if (lcfg->lcfg_nid)
1905                 ptr += snprintf(ptr, end-ptr, "nid=%s("LPX64")\n     ",
1906                                 libcfs_nid2str(lcfg->lcfg_nid),
1907                                 lcfg->lcfg_nid);
1908
1909         if (lcfg->lcfg_command == LCFG_MARKER) {
1910                 struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1911
1912                 ptr += snprintf(ptr, end-ptr, "marker=%d(%#x)%s '%s'",
1913                                 marker->cm_step, marker->cm_flags,
1914                                 marker->cm_tgtname, marker->cm_comment);
1915         } else {
1916                 int i;
1917
1918                 for (i = 0; i <  lcfg->lcfg_bufcount; i++) {
1919                         ptr += snprintf(ptr, end-ptr, "%d:%s  ", i,
1920                                         lustre_cfg_string(lcfg, i));
1921                 }
1922         }
1923         ptr += snprintf(ptr, end - ptr, "\n");
1924         /* return consumed bytes */
1925         rc = ptr - buf;
1926         RETURN(rc);
1927 }
1928
1929 int class_config_dump_handler(const struct lu_env *env,
1930                               struct llog_handle *handle,
1931                               struct llog_rec_hdr *rec, void *data)
1932 {
1933         char    *outstr;
1934         int      rc = 0;
1935
1936         ENTRY;
1937
1938         OBD_ALLOC(outstr, 256);
1939         if (outstr == NULL)
1940                 RETURN(-ENOMEM);
1941
1942         if (rec->lrh_type == OBD_CFG_REC) {
1943                 class_config_parse_rec(rec, outstr, 256);
1944                 LCONSOLE(D_WARNING, "   %s", outstr);
1945         } else {
1946                 LCONSOLE(D_WARNING, "unhandled lrh_type: %#x\n", rec->lrh_type);
1947                 rc = -EINVAL;
1948         }
1949
1950         OBD_FREE(outstr, 256);
1951         RETURN(rc);
1952 }
1953
1954 int class_config_dump_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
1955                            char *name, struct config_llog_instance *cfg)
1956 {
1957         struct llog_handle      *llh;
1958         int                      rc;
1959
1960         ENTRY;
1961
1962         LCONSOLE_INFO("Dumping config log %s\n", name);
1963
1964         rc = llog_open(env, ctxt, &llh, NULL, name, LLOG_OPEN_EXISTS);
1965         if (rc)
1966                 RETURN(rc);
1967
1968         rc = llog_init_handle(env, llh, LLOG_F_IS_PLAIN, NULL);
1969         if (rc)
1970                 GOTO(parse_out, rc);
1971
1972         rc = llog_process(env, llh, class_config_dump_handler, cfg, NULL);
1973 parse_out:
1974         llog_close(env, llh);
1975
1976         LCONSOLE_INFO("End config log %s\n", name);
1977         RETURN(rc);
1978 }
1979 EXPORT_SYMBOL(class_config_dump_llog);
1980
1981 /** Call class_cleanup and class_detach.
1982  * "Manual" only in the sense that we're faking lcfg commands.
1983  */
1984 int class_manual_cleanup(struct obd_device *obd)
1985 {
1986         char                    flags[3] = "";
1987         struct lustre_cfg      *lcfg;
1988         struct lustre_cfg_bufs  bufs;
1989         int                     rc;
1990         ENTRY;
1991
1992         if (!obd) {
1993                 CERROR("empty cleanup\n");
1994                 RETURN(-EALREADY);
1995         }
1996
1997         if (obd->obd_force)
1998                 strcat(flags, "F");
1999         if (obd->obd_fail)
2000                 strcat(flags, "A");
2001
2002         CDEBUG(D_CONFIG, "Manual cleanup of %s (flags='%s')\n",
2003                obd->obd_name, flags);
2004
2005         lustre_cfg_bufs_reset(&bufs, obd->obd_name);
2006         lustre_cfg_bufs_set_string(&bufs, 1, flags);
2007         lcfg = lustre_cfg_new(LCFG_CLEANUP, &bufs);
2008         if (!lcfg)
2009                 RETURN(-ENOMEM);
2010
2011         rc = class_process_config(lcfg);
2012         if (rc) {
2013                 CERROR("cleanup failed %d: %s\n", rc, obd->obd_name);
2014                 GOTO(out, rc);
2015         }
2016
2017         /* the lcfg is almost the same for both ops */
2018         lcfg->lcfg_command = LCFG_DETACH;
2019         rc = class_process_config(lcfg);
2020         if (rc)
2021                 CERROR("detach failed %d: %s\n", rc, obd->obd_name);
2022 out:
2023         lustre_cfg_free(lcfg);
2024         RETURN(rc);
2025 }
2026 EXPORT_SYMBOL(class_manual_cleanup);
2027
2028 /*
2029  * uuid<->export lustre hash operations
2030  */
2031
2032 static unsigned
2033 uuid_hash(cfs_hash_t *hs, const void *key, unsigned mask)
2034 {
2035         return cfs_hash_djb2_hash(((struct obd_uuid *)key)->uuid,
2036                                   sizeof(((struct obd_uuid *)key)->uuid), mask);
2037 }
2038
2039 static void *
2040 uuid_key(cfs_hlist_node_t *hnode)
2041 {
2042         struct obd_export *exp;
2043
2044         exp = cfs_hlist_entry(hnode, struct obd_export, exp_uuid_hash);
2045
2046         return &exp->exp_client_uuid;
2047 }
2048
2049 /*
2050  * NOTE: It is impossible to find an export that is in failed
2051  *       state with this function
2052  */
2053 static int
2054 uuid_keycmp(const void *key, cfs_hlist_node_t *hnode)
2055 {
2056         struct obd_export *exp;
2057
2058         LASSERT(key);
2059         exp = cfs_hlist_entry(hnode, struct obd_export, exp_uuid_hash);
2060
2061         return obd_uuid_equals(key, &exp->exp_client_uuid) &&
2062                !exp->exp_failed;
2063 }
2064
2065 static void *
2066 uuid_export_object(cfs_hlist_node_t *hnode)
2067 {
2068         return cfs_hlist_entry(hnode, struct obd_export, exp_uuid_hash);
2069 }
2070
2071 static void
2072 uuid_export_get(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
2073 {
2074         struct obd_export *exp;
2075
2076         exp = cfs_hlist_entry(hnode, struct obd_export, exp_uuid_hash);
2077         class_export_get(exp);
2078 }
2079
2080 static void
2081 uuid_export_put_locked(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
2082 {
2083         struct obd_export *exp;
2084
2085         exp = cfs_hlist_entry(hnode, struct obd_export, exp_uuid_hash);
2086         class_export_put(exp);
2087 }
2088
2089 static cfs_hash_ops_t uuid_hash_ops = {
2090         .hs_hash        = uuid_hash,
2091         .hs_key         = uuid_key,
2092         .hs_keycmp      = uuid_keycmp,
2093         .hs_object      = uuid_export_object,
2094         .hs_get         = uuid_export_get,
2095         .hs_put_locked  = uuid_export_put_locked,
2096 };
2097
2098
2099 /*
2100  * nid<->export hash operations
2101  */
2102
2103 static unsigned
2104 nid_hash(cfs_hash_t *hs, const void *key, unsigned mask)
2105 {
2106         return cfs_hash_djb2_hash(key, sizeof(lnet_nid_t), mask);
2107 }
2108
2109 static void *
2110 nid_key(cfs_hlist_node_t *hnode)
2111 {
2112         struct obd_export *exp;
2113
2114         exp = cfs_hlist_entry(hnode, struct obd_export, exp_nid_hash);
2115
2116         RETURN(&exp->exp_connection->c_peer.nid);
2117 }
2118
2119 /*
2120  * NOTE: It is impossible to find an export that is in failed
2121  *       state with this function
2122  */
2123 static int
2124 nid_kepcmp(const void *key, cfs_hlist_node_t *hnode)
2125 {
2126         struct obd_export *exp;
2127
2128         LASSERT(key);
2129         exp = cfs_hlist_entry(hnode, struct obd_export, exp_nid_hash);
2130
2131         RETURN(exp->exp_connection->c_peer.nid == *(lnet_nid_t *)key &&
2132                !exp->exp_failed);
2133 }
2134
2135 static void *
2136 nid_export_object(cfs_hlist_node_t *hnode)
2137 {
2138         return cfs_hlist_entry(hnode, struct obd_export, exp_nid_hash);
2139 }
2140
2141 static void
2142 nid_export_get(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
2143 {
2144         struct obd_export *exp;
2145
2146         exp = cfs_hlist_entry(hnode, struct obd_export, exp_nid_hash);
2147         class_export_get(exp);
2148 }
2149
2150 static void
2151 nid_export_put_locked(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
2152 {
2153         struct obd_export *exp;
2154
2155         exp = cfs_hlist_entry(hnode, struct obd_export, exp_nid_hash);
2156         class_export_put(exp);
2157 }
2158
2159 static cfs_hash_ops_t nid_hash_ops = {
2160         .hs_hash        = nid_hash,
2161         .hs_key         = nid_key,
2162         .hs_keycmp      = nid_kepcmp,
2163         .hs_object      = nid_export_object,
2164         .hs_get         = nid_export_get,
2165         .hs_put_locked  = nid_export_put_locked,
2166 };
2167
2168
2169 /*
2170  * nid<->nidstats hash operations
2171  */
2172
2173 static void *
2174 nidstats_key(cfs_hlist_node_t *hnode)
2175 {
2176         struct nid_stat *ns;
2177
2178         ns = cfs_hlist_entry(hnode, struct nid_stat, nid_hash);
2179
2180         return &ns->nid;
2181 }
2182
2183 static int
2184 nidstats_keycmp(const void *key, cfs_hlist_node_t *hnode)
2185 {
2186         return *(lnet_nid_t *)nidstats_key(hnode) == *(lnet_nid_t *)key;
2187 }
2188
2189 static void *
2190 nidstats_object(cfs_hlist_node_t *hnode)
2191 {
2192         return cfs_hlist_entry(hnode, struct nid_stat, nid_hash);
2193 }
2194
2195 static void
2196 nidstats_get(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
2197 {
2198         struct nid_stat *ns;
2199
2200         ns = cfs_hlist_entry(hnode, struct nid_stat, nid_hash);
2201         nidstat_getref(ns);
2202 }
2203
2204 static void
2205 nidstats_put_locked(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
2206 {
2207         struct nid_stat *ns;
2208
2209         ns = cfs_hlist_entry(hnode, struct nid_stat, nid_hash);
2210         nidstat_putref(ns);
2211 }
2212
2213 static cfs_hash_ops_t nid_stat_hash_ops = {
2214         .hs_hash        = nid_hash,
2215         .hs_key         = nidstats_key,
2216         .hs_keycmp      = nidstats_keycmp,
2217         .hs_object      = nidstats_object,
2218         .hs_get         = nidstats_get,
2219         .hs_put_locked  = nidstats_put_locked,
2220 };