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1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2  * vim:expandtab:shiftwidth=8:tabstop=8:
3  *
4  * GPL HEADER START
5  *
6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 only,
10  * as published by the Free Software Foundation.
11  *
12  * This program is distributed in the hope that it will be useful, but
13  * WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * General Public License version 2 for more details (a copy is included
16  * in the LICENSE file that accompanied this code).
17  *
18  * You should have received a copy of the GNU General Public License
19  * version 2 along with this program; If not, see
20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
21  *
22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23  * CA 95054 USA or visit www.sun.com if you need additional information or
24  * have any questions.
25  *
26  * GPL HEADER END
27  */
28 /*
29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
30  * Use is subject to license terms.
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 #else
46 #include <liblustre.h>
47 #include <obd_class.h>
48 #include <obd.h>
49 #endif
50 #include <lustre_log.h>
51 #include <lprocfs_status.h>
52 #include <libcfs/list.h>
53 #include <lustre_param.h>
54 #include <class_hash.h>
55
56 static lustre_hash_ops_t uuid_hash_ops;
57 static lustre_hash_ops_t nid_hash_ops;
58 static lustre_hash_ops_t nid_stat_hash_ops;
59
60 /*********** string parsing utils *********/
61
62 /* returns 0 if we find this key in the buffer, else 1 */
63 int class_find_param(char *buf, char *key, char **valp)
64 {
65         char *ptr;
66
67         if (!buf)
68                 return 1;
69
70         if ((ptr = strstr(buf, key)) == NULL)
71                 return 1;
72
73         if (valp)
74                 *valp = ptr + strlen(key);
75
76         return 0;
77 }
78
79 /**
80  * Finds a parameter in \a params and copies it to \a copy.
81  *
82  * Leading spaces are skipped. Next space or end of string is the
83  * parameter terminator with the exception that spaces inside single or double
84  * quotes get included into a parameter. The parameter is copied into \a copy
85  * which has to be allocated big enough by a caller, quotes are stripped in
86  * the copy and the copy is terminated by 0.
87  *
88  * On return \a params is set to next parameter or to NULL if last
89  * parameter is returned.
90  *
91  * \retval 0 if parameter is returned in \a copy
92  * \retval 1 otherwise
93  * \retval -EINVAL if unbalanced quota is found
94  */
95 int class_get_next_param(char **params, char *copy)
96 {
97         char *q1, *q2, *str;
98         int len;
99
100         str = *params;
101         while (*str == ' ')
102                 str++;
103
104         if (*str == '\0') {
105                 *params = NULL;
106                 return 1;
107         }
108
109         while (1) {
110                 q1 = strpbrk(str, " '\"");
111                 if (q1 == NULL) {
112                         len = strlen(str);
113                         memcpy(copy, str, len);
114                         copy[len] = '\0';
115                         *params = NULL;
116                         return 0;
117                 }
118                 len = q1 - str;
119                 if (*q1 == ' ') {
120                         memcpy(copy, str, len);
121                         copy[len] = '\0';
122                         *params = str + len;
123                         return 0;
124                 }
125
126                 memcpy(copy, str, len);
127                 copy += len;
128
129                 /* search for the matching closing quote */
130                 str = q1 + 1;
131                 q2 = strchr(str, *q1);
132                 if (q2 == NULL) {
133                         CERROR("Unbalanced quota in parameters: \"%s\"\n",
134                                *params);
135                         return -EINVAL;
136                 }
137                 len = q2 - str;
138                 memcpy(copy, str, len);
139                 copy += len;
140                 str = q2 + 1;
141         }
142         return 1;
143 }
144
145 /* returns 0 if this is the first key in the buffer, else 1.
146    valp points to first char after key. */
147 int class_match_param(char *buf, char *key, char **valp)
148 {
149         if (!buf)
150                 return 1;
151
152         if (memcmp(buf, key, strlen(key)) != 0)
153                 return 1;
154
155         if (valp)
156                 *valp = buf + strlen(key);
157
158         return 0;
159 }
160
161 /* 0 is good nid,
162    1 not found
163    < 0 error
164    endh is set to next separator */
165 int class_parse_nid(char *buf, lnet_nid_t *nid, char **endh)
166 {
167         char tmp, *endp;
168
169         if (!buf)
170                 return 1;
171         while (*buf == ',' || *buf == ':')
172                 buf++;
173         if (*buf == ' ' || *buf == '/' || *buf == '\0')
174                 return 1;
175
176         /* nid separators or end of nids */
177         endp = strpbrk(buf, ",: /");
178         if (endp == NULL)
179                 endp = buf + strlen(buf);
180
181         tmp = *endp;
182         *endp = '\0';
183         *nid = libcfs_str2nid(buf);
184         if (*nid == LNET_NID_ANY) {
185                 LCONSOLE_ERROR_MSG(0x159, "Can't parse NID '%s'\n", buf);
186                 *endp = tmp;
187                 return -EINVAL;
188         }
189         *endp = tmp;
190
191         if (endh)
192                 *endh = endp;
193         CDEBUG(D_INFO, "Nid %s\n", libcfs_nid2str(*nid));
194         return 0;
195 }
196
197 EXPORT_SYMBOL(class_find_param);
198 EXPORT_SYMBOL(class_get_next_param);
199 EXPORT_SYMBOL(class_match_param);
200 EXPORT_SYMBOL(class_parse_nid);
201
202 /********************** class fns **********************/
203
204 /**
205  * Create a new device and set the type, name and uuid.  If successful, the new
206  * device can be accessed by either name or uuid.
207  */
208 int class_attach(struct lustre_cfg *lcfg)
209 {
210         struct obd_device *obd = NULL;
211         char *typename, *name, *uuid;
212         int rc, len;
213         ENTRY;
214
215         if (!LUSTRE_CFG_BUFLEN(lcfg, 1)) {
216                 CERROR("No type passed!\n");
217                 RETURN(-EINVAL);
218         }
219         typename = lustre_cfg_string(lcfg, 1);
220
221         if (!LUSTRE_CFG_BUFLEN(lcfg, 0)) {
222                 CERROR("No name passed!\n");
223                 RETURN(-EINVAL);
224         }
225         name = lustre_cfg_string(lcfg, 0);
226
227         if (!LUSTRE_CFG_BUFLEN(lcfg, 2)) {
228                 CERROR("No UUID passed!\n");
229                 RETURN(-EINVAL);
230         }
231         uuid = lustre_cfg_string(lcfg, 2);
232
233         CDEBUG(D_IOCTL, "attach type %s name: %s uuid: %s\n",
234                MKSTR(typename), MKSTR(name), MKSTR(uuid));
235
236         obd = class_newdev(typename, name);
237         if (IS_ERR(obd)) {
238                 /* Already exists or out of obds */
239                 rc = PTR_ERR(obd);
240                 obd = NULL;
241                 CERROR("Cannot create device %s of type %s : %d\n",
242                        name, typename, rc);
243                 GOTO(out, rc);
244         }
245         LASSERTF(obd != NULL, "Cannot get obd device %s of type %s\n",
246                  name, typename);
247         LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
248                  "obd %p obd_magic %08X != %08X\n",
249                  obd, obd->obd_magic, OBD_DEVICE_MAGIC);
250         LASSERTF(strncmp(obd->obd_name, name, strlen(name)) == 0,
251                  "%p obd_name %s != %s\n", obd, obd->obd_name, name);
252
253         rwlock_init(&obd->obd_pool_lock);
254         obd->obd_pool_limit = 0;
255         obd->obd_pool_slv = 0;
256
257         CFS_INIT_LIST_HEAD(&obd->obd_exports);
258         CFS_INIT_LIST_HEAD(&obd->obd_unlinked_exports);
259         CFS_INIT_LIST_HEAD(&obd->obd_delayed_exports);
260         CFS_INIT_LIST_HEAD(&obd->obd_exports_timed);
261         CFS_INIT_LIST_HEAD(&obd->obd_nid_stats);
262         spin_lock_init(&obd->obd_nid_lock);
263         spin_lock_init(&obd->obd_dev_lock);
264         sema_init(&obd->obd_dev_sem, 1);
265         spin_lock_init(&obd->obd_osfs_lock);
266         /* obd->obd_osfs_age must be set to a value in the distant
267          * past to guarantee a fresh statfs is fetched on mount. */
268         obd->obd_osfs_age = cfs_time_shift_64(-1000);
269
270         /* XXX belongs in setup not attach  */
271         /* recovery data */
272         cfs_init_timer(&obd->obd_recovery_timer);
273         spin_lock_init(&obd->obd_processing_task_lock);
274         cfs_waitq_init(&obd->obd_next_transno_waitq);
275         cfs_waitq_init(&obd->obd_evict_inprogress_waitq);
276         CFS_INIT_LIST_HEAD(&obd->obd_req_replay_queue);
277         CFS_INIT_LIST_HEAD(&obd->obd_lock_replay_queue);
278         CFS_INIT_LIST_HEAD(&obd->obd_final_req_queue);
279
280         llog_group_init(&obd->obd_olg, FILTER_GROUP_LLOG);
281
282         len = strlen(uuid);
283         if (len >= sizeof(obd->obd_uuid)) {
284                 CERROR("uuid must be < %d bytes long\n",
285                        (int)sizeof(obd->obd_uuid));
286                 GOTO(out, rc = -EINVAL);
287         }
288         memcpy(obd->obd_uuid.uuid, uuid, len);
289
290         /* do the attach */
291         if (OBP(obd, attach)) {
292                 rc = OBP(obd,attach)(obd, sizeof *lcfg, lcfg);
293                 if (rc)
294                         GOTO(out, rc = -EINVAL);
295         }
296
297         /* Detach drops this */
298         spin_lock(&obd->obd_dev_lock);
299         atomic_set(&obd->obd_refcount, 1);
300         spin_unlock(&obd->obd_dev_lock);
301         lu_ref_init(&obd->obd_reference);
302         lu_ref_add(&obd->obd_reference, "attach", obd);
303
304         obd->obd_attached = 1;
305         CDEBUG(D_IOCTL, "OBD: dev %d attached type %s with refcount %d\n",
306                obd->obd_minor, typename, atomic_read(&obd->obd_refcount));
307         RETURN(0);
308  out:
309         if (obd != NULL) {
310                 class_release_dev(obd);
311         }
312         return rc;
313 }
314
315 int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
316 {
317         int err = 0;
318         struct obd_export *exp;
319         ENTRY;
320
321         LASSERT(obd != NULL);
322         LASSERTF(obd == class_num2obd(obd->obd_minor),
323                  "obd %p != obd_devs[%d] %p\n",
324                  obd, obd->obd_minor, class_num2obd(obd->obd_minor));
325         LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
326                  "obd %p obd_magic %08x != %08x\n",
327                  obd, obd->obd_magic, OBD_DEVICE_MAGIC);
328
329         /* have we attached a type to this device? */
330         if (!obd->obd_attached) {
331                 CERROR("Device %d not attached\n", obd->obd_minor);
332                 RETURN(-ENODEV);
333         }
334
335         if (obd->obd_set_up) {
336                 CERROR("Device %d already setup (type %s)\n",
337                        obd->obd_minor, obd->obd_type->typ_name);
338                 RETURN(-EEXIST);
339         }
340
341         /* is someone else setting us up right now? (attach inits spinlock) */
342         spin_lock(&obd->obd_dev_lock);
343         if (obd->obd_starting) {
344                 spin_unlock(&obd->obd_dev_lock);
345                 CERROR("Device %d setup in progress (type %s)\n",
346                        obd->obd_minor, obd->obd_type->typ_name);
347                 RETURN(-EEXIST);
348         }
349         /* just leave this on forever.  I can't use obd_set_up here because
350            other fns check that status, and we're not actually set up yet. */
351         obd->obd_starting = 1;
352         obd->obd_uuid_hash = NULL;
353         obd->obd_nid_hash = NULL;
354         obd->obd_nid_stats_hash = NULL;
355         spin_unlock(&obd->obd_dev_lock);
356
357         /* create an uuid-export lustre hash */
358         obd->obd_uuid_hash = lustre_hash_init("UUID_HASH",
359                                               HASH_UUID_CUR_BITS,
360                                               HASH_UUID_MAX_BITS,
361                                               &uuid_hash_ops, 0);
362         if (!obd->obd_uuid_hash)
363                 GOTO(err_hash, err = -ENOMEM);
364
365         /* create a nid-export lustre hash */
366         obd->obd_nid_hash = lustre_hash_init("NID_HASH",
367                                              HASH_NID_CUR_BITS,
368                                              HASH_NID_MAX_BITS,
369                                              &nid_hash_ops, 0);
370         if (!obd->obd_nid_hash)
371                 GOTO(err_hash, err = -ENOMEM);
372
373         /* create a nid-stats lustre hash */
374         obd->obd_nid_stats_hash = lustre_hash_init("NID_STATS",
375                                                    HASH_NID_STATS_CUR_BITS,
376                                                    HASH_NID_STATS_MAX_BITS,
377                                                    &nid_stat_hash_ops, 0);
378         if (!obd->obd_nid_stats_hash)
379                 GOTO(err_hash, err = -ENOMEM);
380
381         exp = class_new_export(obd, &obd->obd_uuid);
382         if (IS_ERR(exp))
383                 GOTO(err_hash, err = PTR_ERR(exp));
384
385         obd->obd_self_export = exp;
386         list_del_init(&exp->exp_obd_chain_timed);
387         class_export_put(exp);
388
389         err = obd_setup(obd, lcfg);
390         if (err)
391                 GOTO(err_exp, err);
392
393         obd->obd_set_up = 1;
394
395         spin_lock(&obd->obd_dev_lock);
396         /* cleanup drops this */
397         class_incref(obd, "setup", obd);
398         spin_unlock(&obd->obd_dev_lock);
399
400         CDEBUG(D_IOCTL, "finished setup of obd %s (uuid %s)\n",
401                obd->obd_name, obd->obd_uuid.uuid);
402
403         RETURN(0);
404 err_exp:
405         if (obd->obd_self_export) {
406                 class_unlink_export(obd->obd_self_export);
407                 obd->obd_self_export = NULL;
408         }
409 err_hash:
410         if (obd->obd_uuid_hash) {
411                 lustre_hash_exit(obd->obd_uuid_hash);
412                 obd->obd_uuid_hash = NULL;
413         }
414         if (obd->obd_nid_hash) {
415                 lustre_hash_exit(obd->obd_nid_hash);
416                 obd->obd_nid_hash = NULL;
417         }
418         if (obd->obd_nid_stats_hash) {
419                 lustre_hash_exit(obd->obd_nid_stats_hash);
420                 obd->obd_nid_stats_hash = NULL;
421         }
422         obd->obd_starting = 0;
423         CERROR("setup %s failed (%d)\n", obd->obd_name, err);
424         return err;
425 }
426
427 int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg)
428 {
429         ENTRY;
430
431         if (obd->obd_set_up) {
432                 CERROR("OBD device %d still set up\n", obd->obd_minor);
433                 RETURN(-EBUSY);
434         }
435
436         spin_lock(&obd->obd_dev_lock);
437         if (!obd->obd_attached) {
438                 spin_unlock(&obd->obd_dev_lock);
439                 CERROR("OBD device %d not attached\n", obd->obd_minor);
440                 RETURN(-ENODEV);
441         }
442         obd->obd_attached = 0;
443         spin_unlock(&obd->obd_dev_lock);
444
445         CDEBUG(D_IOCTL, "detach on obd %s (uuid %s)\n",
446                obd->obd_name, obd->obd_uuid.uuid);
447
448         class_decref(obd, "attach", obd);
449
450         /* not strictly necessary, but cleans up eagerly */
451         obd_zombie_impexp_cull();
452
453         RETURN(0);
454 }
455
456 int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg)
457 {
458         int err = 0;
459         char *flag;
460         ENTRY;
461
462         OBD_RACE(OBD_FAIL_LDLM_RECOV_CLIENTS);
463
464         if (!obd->obd_set_up) {
465                 CERROR("Device %d not setup\n", obd->obd_minor);
466                 RETURN(-ENODEV);
467         }
468
469         spin_lock(&obd->obd_dev_lock);
470         if (obd->obd_stopping) {
471                 spin_unlock(&obd->obd_dev_lock);
472                 CERROR("OBD %d already stopping\n", obd->obd_minor);
473                 RETURN(-ENODEV);
474         }
475         /* Leave this on forever */
476         obd->obd_stopping = 1;
477         spin_unlock(&obd->obd_dev_lock);
478
479         if (lcfg->lcfg_bufcount >= 2 && LUSTRE_CFG_BUFLEN(lcfg, 1) > 0) {
480                 for (flag = lustre_cfg_string(lcfg, 1); *flag != 0; flag++)
481                         switch (*flag) {
482                         case 'F':
483                                 obd->obd_force = 1;
484                                 break;
485                         case 'A':
486                                 LCONSOLE_WARN("Failing over %s\n",
487                                               obd->obd_name);
488                                 obd->obd_fail = 1;
489                                 obd->obd_no_transno = 1;
490                                 obd->obd_no_recov = 1;
491                                 if (OBP(obd, iocontrol)) {
492                                         obd_iocontrol(OBD_IOC_SYNC,
493                                                       obd->obd_self_export,
494                                                       0, NULL, NULL);
495                                         /* Set the obd readonly if we can */
496                                         obd_iocontrol(OBD_IOC_SET_READONLY,
497                                                       obd->obd_self_export,
498                                                       0, NULL, NULL);
499                                 }
500                                 break;
501                         default:
502                                 CERROR("Unrecognised flag '%c'\n", *flag);
503                         }
504         }
505
506         LASSERT(obd->obd_self_export);
507
508         /* The three references that should be remaining are the
509          * obd_self_export and the attach and setup references. */
510         if (atomic_read(&obd->obd_refcount) > 3) {
511                 /* refcounf - 3 might be the number of real exports
512                    (excluding self export). But class_incref is called
513                    by other things as well, so don't count on it. */
514                 CDEBUG(D_IOCTL, "%s: forcing exports to disconnect: %d\n",
515                        obd->obd_name, atomic_read(&obd->obd_refcount) - 3);
516                 dump_exports(obd, 0);
517                 class_disconnect_exports(obd);
518         }
519
520         /* destroy an uuid-export hash body */
521         if (obd->obd_uuid_hash) {
522                 lustre_hash_exit(obd->obd_uuid_hash);
523                 obd->obd_uuid_hash = NULL;
524         }
525
526         /* destroy a nid-export hash body */
527         if (obd->obd_nid_hash) {
528                 lustre_hash_exit(obd->obd_nid_hash);
529                 obd->obd_nid_hash = NULL;
530         }
531
532         /* destroy a nid-stats hash body */
533         if (obd->obd_nid_stats_hash) {
534                 lustre_hash_exit(obd->obd_nid_stats_hash);
535                 obd->obd_nid_stats_hash = NULL;
536         }
537
538         /* Precleanup, we must make sure all exports get destroyed. */
539         err = obd_precleanup(obd, OBD_CLEANUP_EXPORTS);
540         if (err)
541                 CERROR("Precleanup %s returned %d\n",
542                        obd->obd_name, err);
543         class_decref(obd, "setup", obd);
544         obd->obd_set_up = 0;
545         RETURN(0);
546 }
547
548 struct obd_device *class_incref(struct obd_device *obd,
549                                 const char *scope, const void *source)
550 {
551         lu_ref_add_atomic(&obd->obd_reference, scope, source);
552         atomic_inc(&obd->obd_refcount);
553         CDEBUG(D_INFO, "incref %s (%p) now %d\n", obd->obd_name, obd,
554                atomic_read(&obd->obd_refcount));
555
556         return obd;
557 }
558
559 void class_decref(struct obd_device *obd, const char *scope, const void *source)
560 {
561         int err;
562         int refs;
563
564         spin_lock(&obd->obd_dev_lock);
565         atomic_dec(&obd->obd_refcount);
566         refs = atomic_read(&obd->obd_refcount);
567         spin_unlock(&obd->obd_dev_lock);
568         lu_ref_del(&obd->obd_reference, scope, source);
569
570         CDEBUG(D_INFO, "Decref %s (%p) now %d\n", obd->obd_name, obd, refs);
571
572         if ((refs == 1) && obd->obd_stopping) {
573                 /* All exports have been destroyed; there should
574                    be no more in-progress ops by this point.*/
575
576                 spin_lock(&obd->obd_self_export->exp_lock);
577                 obd->obd_self_export->exp_flags |= exp_flags_from_obd(obd);
578                 spin_unlock(&obd->obd_self_export->exp_lock);
579
580                 /* note that we'll recurse into class_decref again */
581                 class_unlink_export(obd->obd_self_export);
582                 return;
583         }
584
585         if (refs == 0) {
586                 CDEBUG(D_CONFIG, "finishing cleanup of obd %s (%s)\n",
587                        obd->obd_name, obd->obd_uuid.uuid);
588                 LASSERT(!obd->obd_attached);
589                 if (obd->obd_stopping) {
590                         /* If we're not stopping, we were never set up */
591                         err = obd_cleanup(obd);
592                         if (err)
593                                 CERROR("Cleanup %s returned %d\n",
594                                        obd->obd_name, err);
595                 }
596                 if (OBP(obd, detach)) {
597                         err = OBP(obd, detach)(obd);
598                         if (err)
599                                 CERROR("Detach returned %d\n", err);
600                 }
601                 class_release_dev(obd);
602         }
603 }
604
605 int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
606 {
607         struct obd_import *imp;
608         struct obd_uuid uuid;
609         int rc;
610         ENTRY;
611
612         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
613             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
614                 CERROR("invalid conn_uuid\n");
615                 RETURN(-EINVAL);
616         }
617         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
618             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) &&
619             strcmp(obd->obd_type->typ_name, LUSTRE_MGC_NAME)) {
620                 CERROR("can't add connection on non-client dev\n");
621                 RETURN(-EINVAL);
622         }
623
624         imp = obd->u.cli.cl_import;
625         if (!imp) {
626                 CERROR("try to add conn on immature client dev\n");
627                 RETURN(-EINVAL);
628         }
629
630         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
631         rc = obd_add_conn(imp, &uuid, lcfg->lcfg_num);
632
633         RETURN(rc);
634 }
635
636 int class_del_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
637 {
638         struct obd_import *imp;
639         struct obd_uuid uuid;
640         int rc;
641         ENTRY;
642
643         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
644             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
645                 CERROR("invalid conn_uuid\n");
646                 RETURN(-EINVAL);
647         }
648         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
649             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME)) {
650                 CERROR("can't del connection on non-client dev\n");
651                 RETURN(-EINVAL);
652         }
653
654         imp = obd->u.cli.cl_import;
655         if (!imp) {
656                 CERROR("try to del conn on immature client dev\n");
657                 RETURN(-EINVAL);
658         }
659
660         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
661         rc = obd_del_conn(imp, &uuid);
662
663         RETURN(rc);
664 }
665
666 CFS_LIST_HEAD(lustre_profile_list);
667
668 struct lustre_profile *class_get_profile(const char * prof)
669 {
670         struct lustre_profile *lprof;
671
672         ENTRY;
673         list_for_each_entry(lprof, &lustre_profile_list, lp_list) {
674                 if (!strcmp(lprof->lp_profile, prof)) {
675                         RETURN(lprof);
676                 }
677         }
678         RETURN(NULL);
679 }
680
681 int class_add_profile(int proflen, char *prof, int osclen, char *osc,
682                       int mdclen, char *mdc)
683 {
684         struct lustre_profile *lprof;
685         int err = 0;
686         ENTRY;
687
688         CDEBUG(D_CONFIG, "Add profile %s\n", prof);
689
690         OBD_ALLOC(lprof, sizeof(*lprof));
691         if (lprof == NULL)
692                 RETURN(-ENOMEM);
693         CFS_INIT_LIST_HEAD(&lprof->lp_list);
694
695         LASSERT(proflen == (strlen(prof) + 1));
696         OBD_ALLOC(lprof->lp_profile, proflen);
697         if (lprof->lp_profile == NULL)
698                 GOTO(out, err = -ENOMEM);
699         memcpy(lprof->lp_profile, prof, proflen);
700
701         LASSERT(osclen == (strlen(osc) + 1));
702         OBD_ALLOC(lprof->lp_dt, osclen);
703         if (lprof->lp_dt == NULL)
704                 GOTO(out, err = -ENOMEM);
705         memcpy(lprof->lp_dt, osc, osclen);
706
707         if (mdclen > 0) {
708                 LASSERT(mdclen == (strlen(mdc) + 1));
709                 OBD_ALLOC(lprof->lp_md, mdclen);
710                 if (lprof->lp_md == NULL)
711                         GOTO(out, err = -ENOMEM);
712                 memcpy(lprof->lp_md, mdc, mdclen);
713         }
714
715         list_add(&lprof->lp_list, &lustre_profile_list);
716         RETURN(err);
717
718 out:
719         if (lprof->lp_md)
720                 OBD_FREE(lprof->lp_md, mdclen);
721         if (lprof->lp_dt)
722                 OBD_FREE(lprof->lp_dt, osclen);
723         if (lprof->lp_profile)
724                 OBD_FREE(lprof->lp_profile, proflen);
725         OBD_FREE(lprof, sizeof(*lprof));
726         RETURN(err);
727 }
728
729 void class_del_profile(const char *prof)
730 {
731         struct lustre_profile *lprof;
732         ENTRY;
733
734         CDEBUG(D_CONFIG, "Del profile %s\n", prof);
735
736         lprof = class_get_profile(prof);
737         if (lprof) {
738                 list_del(&lprof->lp_list);
739                 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
740                 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
741                 if (lprof->lp_md)
742                         OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
743                 OBD_FREE(lprof, sizeof *lprof);
744         }
745         EXIT;
746 }
747
748 /* COMPAT_146 */
749 void class_del_profiles(void)
750 {
751         struct lustre_profile *lprof, *n;
752         ENTRY;
753
754         list_for_each_entry_safe(lprof, n, &lustre_profile_list, lp_list) {
755                 list_del(&lprof->lp_list);
756                 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
757                 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
758                 if (lprof->lp_md)
759                         OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
760                 OBD_FREE(lprof, sizeof *lprof);
761         }
762         EXIT;
763 }
764
765 static int class_set_global(char *ptr, int val) {
766         ENTRY;
767
768         if (class_match_param(ptr, PARAM_AT_MIN, NULL) == 0)
769             at_min = val;
770         else if (class_match_param(ptr, PARAM_AT_MAX, NULL) == 0)
771                 at_max = val;
772         else if (class_match_param(ptr, PARAM_AT_EXTRA, NULL) == 0)
773                 at_extra = val;
774         else if (class_match_param(ptr, PARAM_AT_EARLY_MARGIN, NULL) == 0)
775                 at_early_margin = val;
776         else if (class_match_param(ptr, PARAM_AT_HISTORY, NULL) == 0)
777                 at_history = val;
778         else
779                 RETURN(-EINVAL);
780
781         CDEBUG(D_IOCTL, "global %s = %d\n", ptr, val);
782
783         RETURN(0);
784 }
785
786
787 /* We can't call ll_process_config directly because it lives in a module that
788    must be loaded after this one. */
789 static int (*client_process_config)(struct lustre_cfg *lcfg) = NULL;
790
791 void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg))
792 {
793         client_process_config = cpc;
794 }
795 EXPORT_SYMBOL(lustre_register_client_process_config);
796
797 int class_process_config(struct lustre_cfg *lcfg)
798 {
799         struct obd_device *obd;
800         int err;
801
802         LASSERT(lcfg && !IS_ERR(lcfg));
803         CDEBUG(D_IOCTL, "processing cmd: %x\n", lcfg->lcfg_command);
804
805         /* Commands that don't need a device */
806         switch(lcfg->lcfg_command) {
807         case LCFG_ATTACH: {
808                 err = class_attach(lcfg);
809                 GOTO(out, err);
810         }
811         case LCFG_ADD_UUID: {
812                 CDEBUG(D_IOCTL, "adding mapping from uuid %s to nid "LPX64
813                        " (%s)\n", lustre_cfg_string(lcfg, 1),
814                        lcfg->lcfg_nid, libcfs_nid2str(lcfg->lcfg_nid));
815
816                 err = class_add_uuid(lustre_cfg_string(lcfg, 1), lcfg->lcfg_nid);
817                 GOTO(out, err);
818         }
819         case LCFG_DEL_UUID: {
820                 CDEBUG(D_IOCTL, "removing mappings for uuid %s\n",
821                        (lcfg->lcfg_bufcount < 2 || LUSTRE_CFG_BUFLEN(lcfg, 1) == 0)
822                        ? "<all uuids>" : lustre_cfg_string(lcfg, 1));
823
824                 err = class_del_uuid(lustre_cfg_string(lcfg, 1));
825                 GOTO(out, err);
826         }
827         case LCFG_MOUNTOPT: {
828                 CDEBUG(D_IOCTL, "mountopt: profile %s osc %s mdc %s\n",
829                        lustre_cfg_string(lcfg, 1),
830                        lustre_cfg_string(lcfg, 2),
831                        lustre_cfg_string(lcfg, 3));
832                 /* set these mount options somewhere, so ll_fill_super
833                  * can find them. */
834                 err = class_add_profile(LUSTRE_CFG_BUFLEN(lcfg, 1),
835                                         lustre_cfg_string(lcfg, 1),
836                                         LUSTRE_CFG_BUFLEN(lcfg, 2),
837                                         lustre_cfg_string(lcfg, 2),
838                                         LUSTRE_CFG_BUFLEN(lcfg, 3),
839                                         lustre_cfg_string(lcfg, 3));
840                 GOTO(out, err);
841         }
842         case LCFG_DEL_MOUNTOPT: {
843                 CDEBUG(D_IOCTL, "mountopt: profile %s\n",
844                        lustre_cfg_string(lcfg, 1));
845                 class_del_profile(lustre_cfg_string(lcfg, 1));
846                 GOTO(out, err = 0);
847         }
848         case LCFG_SET_TIMEOUT: {
849                 CDEBUG(D_IOCTL, "changing lustre timeout from %d to %d\n",
850                        obd_timeout, lcfg->lcfg_num);
851                 obd_timeout = max(lcfg->lcfg_num, 1U);
852                 GOTO(out, err = 0);
853         }
854         case LCFG_SET_LDLM_TIMEOUT: {
855                 CDEBUG(D_IOCTL, "changing lustre ldlm_timeout from %d to %d\n",
856                        ldlm_timeout, lcfg->lcfg_num);
857                 ldlm_timeout = max(lcfg->lcfg_num, 1U);
858                 if (ldlm_timeout >= obd_timeout)
859                         ldlm_timeout = max(obd_timeout / 3, 1U);
860
861                 GOTO(out, err = 0);
862         }
863         case LCFG_SET_UPCALL: {
864                 LCONSOLE_ERROR_MSG(0x15a, "recovery upcall is deprecated\n");
865                 /* COMPAT_146 Don't fail on old configs */
866                 GOTO(out, err = 0);
867         }
868         case LCFG_MARKER: {
869                 struct cfg_marker *marker;
870                 marker = lustre_cfg_buf(lcfg, 1);
871                 CDEBUG(D_IOCTL, "marker %d (%#x) %.16s %s\n", marker->cm_step,
872                        marker->cm_flags, marker->cm_tgtname, marker->cm_comment);
873                 GOTO(out, err = 0);
874         }
875         case LCFG_PARAM: {
876                 char *tmp;
877                 /* llite has no obd */
878                 if ((class_match_param(lustre_cfg_string(lcfg, 1),
879                                        PARAM_LLITE, 0) == 0) &&
880                     client_process_config) {
881                         err = (*client_process_config)(lcfg);
882                         GOTO(out, err);
883                 } else if ((class_match_param(lustre_cfg_string(lcfg, 1),
884                                               PARAM_SYS, &tmp) == 0)) {
885                         /* Global param settings */
886                         err = class_set_global(tmp, lcfg->lcfg_num);
887                         /* Note that since LCFG_PARAM is LCFG_REQUIRED, new
888                            unknown globals would cause config to fail */
889                         if (err)
890                                 CWARN("Ignoring unknown param %s\n", tmp);
891                         GOTO(out, 0);
892                 }
893
894                 /* Fall through */
895                 break;
896         }
897         }
898
899         /* Commands that require a device */
900         obd = class_name2obd(lustre_cfg_string(lcfg, 0));
901         if (obd == NULL) {
902                 if (!LUSTRE_CFG_BUFLEN(lcfg, 0))
903                         CERROR("this lcfg command requires a device name\n");
904                 else
905                         CERROR("no device for: %s\n",
906                                lustre_cfg_string(lcfg, 0));
907
908                 GOTO(out, err = -EINVAL);
909         }
910
911         switch(lcfg->lcfg_command) {
912         case LCFG_SETUP: {
913                 err = class_setup(obd, lcfg);
914                 GOTO(out, err);
915         }
916         case LCFG_DETACH: {
917                 err = class_detach(obd, lcfg);
918                 GOTO(out, err = 0);
919         }
920         case LCFG_CLEANUP: {
921                 err = class_cleanup(obd, lcfg);
922                 GOTO(out, err = 0);
923         }
924         case LCFG_ADD_CONN: {
925                 err = class_add_conn(obd, lcfg);
926                 GOTO(out, err = 0);
927         }
928         case LCFG_DEL_CONN: {
929                 err = class_del_conn(obd, lcfg);
930                 GOTO(out, err = 0);
931         }
932         case LCFG_POOL_NEW: {
933                 err = obd_pool_new(obd, lustre_cfg_string(lcfg, 2));
934                 GOTO(out, err = 0);
935                 break;
936         }
937         case LCFG_POOL_ADD: {
938                 err = obd_pool_add(obd, lustre_cfg_string(lcfg, 2),
939                                    lustre_cfg_string(lcfg, 3));
940                 GOTO(out, err = 0);
941                 break;
942         }
943         case LCFG_POOL_REM: {
944                 err = obd_pool_rem(obd, lustre_cfg_string(lcfg, 2),
945                                    lustre_cfg_string(lcfg, 3));
946                 GOTO(out, err = 0);
947                 break;
948         }
949         case LCFG_POOL_DEL: {
950                 err = obd_pool_del(obd, lustre_cfg_string(lcfg, 2));
951                 GOTO(out, err = 0);
952                 break;
953         }
954         default: {
955                 err = obd_process_config(obd, sizeof(*lcfg), lcfg);
956                 GOTO(out, err);
957
958         }
959         }
960 out:
961         if ((err < 0) && !(lcfg->lcfg_command & LCFG_REQUIRED)) {
962                 CWARN("Ignoring error %d on optional command %#x\n", err,
963                       lcfg->lcfg_command);
964                 err = 0;
965         }
966         return err;
967 }
968
969 int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
970                              struct lustre_cfg *lcfg, void *data)
971 {
972 #ifdef __KERNEL__
973         struct lprocfs_vars *var;
974         char *key, *sval;
975         int i, keylen, vallen;
976         int matched = 0, j = 0;
977         int rc = 0;
978         int skip = 0;
979         ENTRY;
980
981         if (lcfg->lcfg_command != LCFG_PARAM) {
982                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
983                 RETURN(-EINVAL);
984         }
985
986         /* e.g. tunefs.lustre --param mdt.group_upcall=foo /r/tmp/lustre-mdt
987            or   lctl conf_param lustre-MDT0000.mdt.group_upcall=bar
988            or   lctl conf_param lustre-OST0000.osc.max_dirty_mb=36 */
989         for (i = 1; i < lcfg->lcfg_bufcount; i++) {
990                 key = lustre_cfg_buf(lcfg, i);
991                 /* Strip off prefix */
992                 class_match_param(key, prefix, &key);
993                 sval = strchr(key, '=');
994                 if (!sval || (*(sval + 1) == 0)) {
995                         CERROR("Can't parse param %s (missing '=')\n", key);
996                         /* rc = -EINVAL;        continue parsing other params */
997                         continue;
998                 }
999                 keylen = sval - key;
1000                 sval++;
1001                 vallen = strlen(sval);
1002                 matched = 0;
1003                 j = 0;
1004                 /* Search proc entries */
1005                 while (lvars[j].name) {
1006                         var = &lvars[j];
1007                         if (class_match_param(key, (char *)var->name, 0) == 0 &&
1008                             keylen == strlen(var->name)) {
1009                                 matched++;
1010                                 rc = -EROFS;
1011                                 if (var->write_fptr) {
1012                                         mm_segment_t oldfs;
1013                                         oldfs = get_fs();
1014                                         set_fs(KERNEL_DS);
1015                                         rc = (var->write_fptr)(NULL, sval,
1016                                                                vallen, data);
1017                                         set_fs(oldfs);
1018                                 }
1019                                 break;
1020                         }
1021                         j++;
1022                 }
1023                 if (!matched) {
1024                         /* If the prefix doesn't match, return error so we
1025                            can pass it down the stack */
1026                         if (strnchr(key, keylen, '.'))
1027                             RETURN(-ENOSYS);
1028                         CERROR("%s: unknown param %s\n",
1029                                (char *)lustre_cfg_string(lcfg, 0), key);
1030                         /* rc = -EINVAL;        continue parsing other params */
1031                         skip++;
1032                 } else if (rc < 0) {
1033                         CERROR("writing proc entry %s err %d\n",
1034                                var->name, rc);
1035                         rc = 0;
1036                 } else {
1037                         LCONSOLE_INFO("%s.%.*s: set parameter %.*s=%s\n",
1038                                       lustre_cfg_string(lcfg, 0),
1039                                       (int)strlen(prefix) - 1, prefix,
1040                                       (int)(sval - key - 1), key, sval);
1041                 }
1042         }
1043
1044         if (rc > 0)
1045                 rc = 0;
1046         if (!rc && skip)
1047                 rc = skip;
1048         RETURN(rc);
1049 #else
1050         CDEBUG(D_CONFIG, "liblustre can't process params.\n");
1051         /* Don't throw config error */
1052         RETURN(0);
1053 #endif
1054 }
1055
1056 int class_config_dump_handler(struct llog_handle * handle,
1057                               struct llog_rec_hdr *rec, void *data);
1058
1059 #ifdef __KERNEL__
1060 extern int lustre_check_exclusion(struct super_block *sb, char *svname);
1061 #else
1062 #define lustre_check_exclusion(a,b)  0
1063 #endif
1064
1065 static int class_config_llog_handler(struct llog_handle * handle,
1066                                      struct llog_rec_hdr *rec, void *data)
1067 {
1068         struct config_llog_instance *clli = data;
1069         int cfg_len = rec->lrh_len;
1070         char *cfg_buf = (char*) (rec + 1);
1071         int rc = 0;
1072         ENTRY;
1073
1074         //class_config_dump_handler(handle, rec, data);
1075
1076         switch (rec->lrh_type) {
1077         case OBD_CFG_REC: {
1078                 struct lustre_cfg *lcfg, *lcfg_new;
1079                 struct lustre_cfg_bufs bufs;
1080                 char *inst_name = NULL;
1081                 int inst_len = 0;
1082                 int inst = 0, swab = 0;
1083
1084                 lcfg = (struct lustre_cfg *)cfg_buf;
1085                 if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION)) {
1086                         lustre_swab_lustre_cfg(lcfg);
1087                         swab = 1;
1088                 }
1089
1090                 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1091                 if (rc)
1092                         GOTO(out, rc);
1093
1094                 /* Figure out config state info */
1095                 if (lcfg->lcfg_command == LCFG_MARKER) {
1096                         struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1097                         lustre_swab_cfg_marker(marker, swab,
1098                                                LUSTRE_CFG_BUFLEN(lcfg, 1));
1099                         CDEBUG(D_CONFIG, "Marker, inst_flg=%#x mark_flg=%#x\n",
1100                                clli->cfg_flags, marker->cm_flags);
1101                         if (marker->cm_flags & CM_START) {
1102                                 /* all previous flags off */
1103                                 clli->cfg_flags = CFG_F_MARKER;
1104                                 if (marker->cm_flags & CM_SKIP) {
1105                                         clli->cfg_flags |= CFG_F_SKIP;
1106                                         CDEBUG(D_CONFIG, "SKIP #%d\n",
1107                                                marker->cm_step);
1108                                 } else if ((marker->cm_flags & CM_EXCLUDE) ||
1109                                            (clli->cfg_sb &&
1110                                             lustre_check_exclusion(clli->cfg_sb,
1111                                                          marker->cm_tgtname))) {
1112                                         clli->cfg_flags |= CFG_F_EXCLUDE;
1113                                         CDEBUG(D_CONFIG, "EXCLUDE %d\n",
1114                                                marker->cm_step);
1115                                 }
1116                         } else if (marker->cm_flags & CM_END) {
1117                                 clli->cfg_flags = 0;
1118                         }
1119                 }
1120                 /* A config command without a start marker before it is
1121                    illegal (post 146) */
1122                 if (!(clli->cfg_flags & CFG_F_COMPAT146) &&
1123                     !(clli->cfg_flags & CFG_F_MARKER) &&
1124                     (lcfg->lcfg_command != LCFG_MARKER)) {
1125                         CWARN("Config not inside markers, ignoring! "
1126                               "(inst: %s, uuid: %s, flags: %#x)\n",
1127                               clli->cfg_instance ? clli->cfg_instance : "<null>",
1128                               clli->cfg_uuid.uuid, clli->cfg_flags);
1129                         clli->cfg_flags |= CFG_F_SKIP;
1130                 }
1131                 if (clli->cfg_flags & CFG_F_SKIP) {
1132                         CDEBUG(D_CONFIG, "skipping %#x\n",
1133                                clli->cfg_flags);
1134                         rc = 0;
1135                         /* No processing! */
1136                         break;
1137                 }
1138
1139                 /*
1140                  * For interoperability between 1.8 and 2.0,
1141                  * rename "mds" obd device type to "mdt".
1142                  */
1143                 {
1144                         char *typename = lustre_cfg_string(lcfg, 1);
1145                         char *index = lustre_cfg_string(lcfg, 2);
1146
1147                         if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
1148                              strcmp(typename, "mds") == 0)) {
1149                                 CWARN("For 1.8 interoperability, rename obd "
1150                                        "type from mds to mdt\n");
1151                                 typename[2] = 't';
1152                         }
1153                         if ((lcfg->lcfg_command == LCFG_SETUP && index &&
1154                              strcmp(index, "type") == 0)) {
1155                                 CDEBUG(D_INFO, "For 1.8 interoperability, "
1156                                        "set this index to '0'\n");
1157                                 index[0] = '0';
1158                                 index[1] = 0;
1159                         }
1160                 }
1161
1162                 if ((clli->cfg_flags & CFG_F_EXCLUDE) &&
1163                     (lcfg->lcfg_command == LCFG_LOV_ADD_OBD))
1164                         /* Add inactive instead */
1165                         lcfg->lcfg_command = LCFG_LOV_ADD_INA;
1166
1167                 lustre_cfg_bufs_init(&bufs, lcfg);
1168
1169                 if (clli && clli->cfg_instance &&
1170                     LUSTRE_CFG_BUFLEN(lcfg, 0) > 0){
1171                         inst = 1;
1172                         inst_len = LUSTRE_CFG_BUFLEN(lcfg, 0) +
1173                                 strlen(clli->cfg_instance) + 1;
1174                         OBD_ALLOC(inst_name, inst_len);
1175                         if (inst_name == NULL)
1176                                 GOTO(out, rc = -ENOMEM);
1177                         sprintf(inst_name, "%s-%s",
1178                                 lustre_cfg_string(lcfg, 0),
1179                                 clli->cfg_instance);
1180                         lustre_cfg_bufs_set_string(&bufs, 0, inst_name);
1181                         CDEBUG(D_CONFIG, "cmd %x, instance name: %s\n",
1182                                lcfg->lcfg_command, inst_name);
1183                 }
1184
1185                 /* we override the llog's uuid for clients, to insure they
1186                 are unique */
1187                 if (clli && clli->cfg_instance &&
1188                     lcfg->lcfg_command == LCFG_ATTACH) {
1189                         lustre_cfg_bufs_set_string(&bufs, 2,
1190                                                    clli->cfg_uuid.uuid);
1191                 }
1192                 /*
1193                  * sptlrpc config record, we expect 2 data segments:
1194                  *  [0]: fs_name/target_name,
1195                  *  [1]: rule string
1196                  * moving them to index [1] and [2], and insert MGC's
1197                  * obdname at index [0].
1198                  */
1199                 if (clli && clli->cfg_instance == NULL &&
1200                     lcfg->lcfg_command == LCFG_SPTLRPC_CONF) {
1201                         lustre_cfg_bufs_set(&bufs, 2, bufs.lcfg_buf[1],
1202                                             bufs.lcfg_buflen[1]);
1203                         lustre_cfg_bufs_set(&bufs, 1, bufs.lcfg_buf[0],
1204                                             bufs.lcfg_buflen[0]);
1205                         lustre_cfg_bufs_set_string(&bufs, 0,
1206                                                    clli->cfg_obdname);
1207                 }
1208
1209                 lcfg_new = lustre_cfg_new(lcfg->lcfg_command, &bufs);
1210
1211                 lcfg_new->lcfg_num   = lcfg->lcfg_num;
1212                 lcfg_new->lcfg_flags = lcfg->lcfg_flags;
1213
1214                 /* XXX Hack to try to remain binary compatible with
1215                  * pre-newconfig logs */
1216                 if (lcfg->lcfg_nal != 0 &&      /* pre-newconfig log? */
1217                     (lcfg->lcfg_nid >> 32) == 0) {
1218                         __u32 addr = (__u32)(lcfg->lcfg_nid & 0xffffffff);
1219
1220                         lcfg_new->lcfg_nid =
1221                                 LNET_MKNID(LNET_MKNET(lcfg->lcfg_nal, 0), addr);
1222                         CWARN("Converted pre-newconfig NAL %d NID %x to %s\n",
1223                               lcfg->lcfg_nal, addr,
1224                               libcfs_nid2str(lcfg_new->lcfg_nid));
1225                 } else {
1226                         lcfg_new->lcfg_nid = lcfg->lcfg_nid;
1227                 }
1228
1229                 lcfg_new->lcfg_nal = 0; /* illegal value for obsolete field */
1230
1231                 rc = class_process_config(lcfg_new);
1232                 lustre_cfg_free(lcfg_new);
1233
1234                 if (inst)
1235                         OBD_FREE(inst_name, inst_len);
1236                 break;
1237         }
1238         default:
1239                 CERROR("Unknown llog record type %#x encountered\n",
1240                        rec->lrh_type);
1241                 break;
1242         }
1243 out:
1244         if (rc) {
1245                 CERROR("Err %d on cfg command:\n", rc);
1246                 class_config_dump_handler(handle, rec, data);
1247         }
1248         RETURN(rc);
1249 }
1250
1251 int class_config_parse_llog(struct llog_ctxt *ctxt, char *name,
1252                             struct config_llog_instance *cfg)
1253 {
1254         struct llog_process_cat_data cd = {0, 0};
1255         struct llog_handle *llh;
1256         int rc, rc2;
1257         ENTRY;
1258
1259         CDEBUG(D_INFO, "looking up llog %s\n", name);
1260         rc = llog_create(ctxt, &llh, NULL, name);
1261         if (rc)
1262                 RETURN(rc);
1263
1264         rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
1265         if (rc)
1266                 GOTO(parse_out, rc);
1267
1268         /* continue processing from where we last stopped to end-of-log */
1269         if (cfg)
1270                 cd.lpcd_first_idx = cfg->cfg_last_idx;
1271         cd.lpcd_last_idx = 0;
1272
1273         rc = llog_process(llh, class_config_llog_handler, cfg, &cd);
1274
1275         CDEBUG(D_CONFIG, "Processed log %s gen %d-%d (rc=%d)\n", name,
1276                cd.lpcd_first_idx + 1, cd.lpcd_last_idx, rc);
1277
1278         if (cfg)
1279                 cfg->cfg_last_idx = cd.lpcd_last_idx;
1280
1281 parse_out:
1282         rc2 = llog_close(llh);
1283         if (rc == 0)
1284                 rc = rc2;
1285
1286         RETURN(rc);
1287 }
1288
1289 int class_config_dump_handler(struct llog_handle * handle,
1290                               struct llog_rec_hdr *rec, void *data)
1291 {
1292         int cfg_len = rec->lrh_len;
1293         char *cfg_buf = (char*) (rec + 1);
1294         char *outstr, *ptr, *end;
1295         int rc = 0;
1296         ENTRY;
1297
1298         OBD_ALLOC(outstr, 256);
1299         end = outstr + 256;
1300         ptr = outstr;
1301         if (!outstr) {
1302                 RETURN(-ENOMEM);
1303         }
1304         if (rec->lrh_type == OBD_CFG_REC) {
1305                 struct lustre_cfg *lcfg;
1306                 int i;
1307
1308                 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1309                 if (rc)
1310                         GOTO(out, rc);
1311                 lcfg = (struct lustre_cfg *)cfg_buf;
1312
1313                 ptr += snprintf(ptr, end-ptr, "cmd=%05x ",
1314                                 lcfg->lcfg_command);
1315                 if (lcfg->lcfg_flags) {
1316                         ptr += snprintf(ptr, end-ptr, "flags=%#08x ",
1317                                         lcfg->lcfg_flags);
1318                 }
1319                 if (lcfg->lcfg_num) {
1320                         ptr += snprintf(ptr, end-ptr, "num=%#08x ",
1321                                         lcfg->lcfg_num);
1322                 }
1323                 if (lcfg->lcfg_nid) {
1324                         ptr += snprintf(ptr, end-ptr, "nid=%s("LPX64")\n     ",
1325                                         libcfs_nid2str(lcfg->lcfg_nid),
1326                                         lcfg->lcfg_nid);
1327                 }
1328                 if (lcfg->lcfg_command == LCFG_MARKER) {
1329                         struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1330                         ptr += snprintf(ptr, end-ptr, "marker=%d(%#x)%s '%s'",
1331                                         marker->cm_step, marker->cm_flags,
1332                                         marker->cm_tgtname, marker->cm_comment);
1333                 } else {
1334                         for (i = 0; i <  lcfg->lcfg_bufcount; i++) {
1335                                 ptr += snprintf(ptr, end-ptr, "%d:%s  ", i,
1336                                                 lustre_cfg_string(lcfg, i));
1337                         }
1338                 }
1339                 LCONSOLE(D_WARNING, "   %s\n", outstr);
1340         } else {
1341                 LCONSOLE(D_WARNING, "unhandled lrh_type: %#x\n", rec->lrh_type);
1342                 rc = -EINVAL;
1343         }
1344 out:
1345         OBD_FREE(outstr, 256);
1346         RETURN(rc);
1347 }
1348
1349 int class_config_dump_llog(struct llog_ctxt *ctxt, char *name,
1350                            struct config_llog_instance *cfg)
1351 {
1352         struct llog_handle *llh;
1353         int rc, rc2;
1354         ENTRY;
1355
1356         LCONSOLE_INFO("Dumping config log %s\n", name);
1357
1358         rc = llog_create(ctxt, &llh, NULL, name);
1359         if (rc)
1360                 RETURN(rc);
1361
1362         rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
1363         if (rc)
1364                 GOTO(parse_out, rc);
1365
1366         rc = llog_process(llh, class_config_dump_handler, cfg, NULL);
1367 parse_out:
1368         rc2 = llog_close(llh);
1369         if (rc == 0)
1370                 rc = rc2;
1371
1372         LCONSOLE_INFO("End config log %s\n", name);
1373         RETURN(rc);
1374
1375 }
1376
1377 /* Cleanup and detach */
1378 int class_manual_cleanup(struct obd_device *obd)
1379 {
1380         char                    flags[3] = "";
1381         struct lustre_cfg      *lcfg;
1382         struct lustre_cfg_bufs  bufs;
1383         int                     rc;
1384         ENTRY;
1385
1386         if (!obd) {
1387                 CERROR("empty cleanup\n");
1388                 RETURN(-EALREADY);
1389         }
1390
1391         if (obd->obd_force)
1392                 strcat(flags, "F");
1393         if (obd->obd_fail)
1394                 strcat(flags, "A");
1395
1396         CDEBUG(D_CONFIG, "Manual cleanup of %s (flags='%s')\n",
1397                obd->obd_name, flags);
1398
1399         lustre_cfg_bufs_reset(&bufs, obd->obd_name);
1400         lustre_cfg_bufs_set_string(&bufs, 1, flags);
1401         lcfg = lustre_cfg_new(LCFG_CLEANUP, &bufs);
1402         if (!lcfg)
1403                 RETURN(-ENOMEM);
1404
1405         rc = class_process_config(lcfg);
1406         if (rc) {
1407                 CERROR("cleanup failed %d: %s\n", rc, obd->obd_name);
1408                 GOTO(out, rc);
1409         }
1410
1411         /* the lcfg is almost the same for both ops */
1412         lcfg->lcfg_command = LCFG_DETACH;
1413         rc = class_process_config(lcfg);
1414         if (rc)
1415                 CERROR("detach failed %d: %s\n", rc, obd->obd_name);
1416 out:
1417         lustre_cfg_free(lcfg);
1418         RETURN(rc);
1419 }
1420
1421 /*
1422  * uuid<->export lustre hash operations
1423  */
1424
1425 static unsigned
1426 uuid_hash(lustre_hash_t *lh,  void *key, unsigned mask)
1427 {
1428         return lh_djb2_hash(((struct obd_uuid *)key)->uuid,
1429                             sizeof(((struct obd_uuid *)key)->uuid), mask);
1430 }
1431
1432 static void *
1433 uuid_key(struct hlist_node *hnode)
1434 {
1435         struct obd_export *exp;
1436
1437         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1438
1439         RETURN(&exp->exp_client_uuid);
1440 }
1441
1442 /*
1443  * NOTE: It is impossible to find an export that is in failed
1444  *       state with this function
1445  */
1446 static int
1447 uuid_compare(void *key, struct hlist_node *hnode)
1448 {
1449         struct obd_export *exp;
1450
1451         LASSERT(key);
1452         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1453
1454         RETURN(obd_uuid_equals((struct obd_uuid *)key,&exp->exp_client_uuid) &&
1455                !exp->exp_failed);
1456 }
1457
1458 static void *
1459 uuid_export_get(struct hlist_node *hnode)
1460 {
1461         struct obd_export *exp;
1462
1463         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1464         class_export_get(exp);
1465
1466         RETURN(exp);
1467 }
1468
1469 static void *
1470 uuid_export_put(struct hlist_node *hnode)
1471 {
1472         struct obd_export *exp;
1473
1474         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1475         class_export_put(exp);
1476
1477         RETURN(exp);
1478 }
1479
1480 static lustre_hash_ops_t uuid_hash_ops = {
1481         .lh_hash    = uuid_hash,
1482         .lh_key     = uuid_key,
1483         .lh_compare = uuid_compare,
1484         .lh_get     = uuid_export_get,
1485         .lh_put     = uuid_export_put,
1486 };
1487
1488
1489 /*
1490  * nid<->export hash operations
1491  */
1492
1493 static unsigned
1494 nid_hash(lustre_hash_t *lh,  void *key, unsigned mask)
1495 {
1496         return lh_djb2_hash(key, sizeof(lnet_nid_t), mask);
1497 }
1498
1499 static void *
1500 nid_key(struct hlist_node *hnode)
1501 {
1502         struct obd_export *exp;
1503
1504         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1505
1506         RETURN(&exp->exp_connection->c_peer.nid);
1507 }
1508
1509 /*
1510  * NOTE: It is impossible to find an export that is in failed
1511  *       state with this function
1512  */
1513 static int
1514 nid_compare(void *key, struct hlist_node *hnode)
1515 {
1516         struct obd_export *exp;
1517
1518         LASSERT(key);
1519         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1520
1521         RETURN(exp->exp_connection->c_peer.nid == *(lnet_nid_t *)key &&
1522                !exp->exp_failed);
1523 }
1524
1525 static void *
1526 nid_export_get(struct hlist_node *hnode)
1527 {
1528         struct obd_export *exp;
1529
1530         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1531         class_export_get(exp);
1532
1533         RETURN(exp);
1534 }
1535
1536 static void *
1537 nid_export_put(struct hlist_node *hnode)
1538 {
1539         struct obd_export *exp;
1540
1541         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1542         class_export_put(exp);
1543
1544         RETURN(exp);
1545 }
1546
1547 static lustre_hash_ops_t nid_hash_ops = {
1548         .lh_hash    = nid_hash,
1549         .lh_key     = nid_key,
1550         .lh_compare = nid_compare,
1551         .lh_get     = nid_export_get,
1552         .lh_put     = nid_export_put,
1553 };
1554
1555
1556 /*
1557  * nid<->nidstats hash operations
1558  */
1559
1560 static void *
1561 nidstats_key(struct hlist_node *hnode)
1562 {
1563         struct nid_stat *ns;
1564
1565         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
1566
1567         RETURN(&ns->nid);
1568 }
1569
1570 static int
1571 nidstats_compare(void *key, struct hlist_node *hnode)
1572 {
1573         RETURN(*(lnet_nid_t *)nidstats_key(hnode) == *(lnet_nid_t *)key);
1574 }
1575
1576 static void *
1577 nidstats_get(struct hlist_node *hnode)
1578 {
1579         struct nid_stat *ns;
1580
1581         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
1582         nidstat_getref(ns);
1583
1584         RETURN(ns);
1585 }
1586
1587 static void *
1588 nidstats_put(struct hlist_node *hnode)
1589 {
1590         struct nid_stat *ns;
1591
1592         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
1593         nidstat_putref(ns);
1594
1595         RETURN(ns);
1596 }
1597
1598 static lustre_hash_ops_t nid_stat_hash_ops = {
1599         .lh_hash    = nid_hash,
1600         .lh_key     = nidstats_key,
1601         .lh_compare = nidstats_compare,
1602         .lh_get     = nidstats_get,
1603         .lh_put     = nidstats_put,
1604 };