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[fs/lustre-release.git] / lustre / obdclass / obd_config.c
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
55 static cfs_hash_ops_t uuid_hash_ops;
56 static cfs_hash_ops_t nid_hash_ops;
57 static cfs_hash_ops_t nid_stat_hash_ops;
58
59 /*********** string parsing utils *********/
60
61 /* returns 0 if we find this key in the buffer, else 1 */
62 int class_find_param(char *buf, char *key, char **valp)
63 {
64         char *ptr;
65
66         if (!buf)
67                 return 1;
68
69         if ((ptr = strstr(buf, key)) == NULL)
70                 return 1;
71
72         if (valp)
73                 *valp = ptr + strlen(key);
74
75         return 0;
76 }
77
78 /**
79  * Finds a parameter in \a params and copies it to \a copy.
80  *
81  * Leading spaces are skipped. Next space or end of string is the
82  * parameter terminator with the exception that spaces inside single or double
83  * quotes get included into a parameter. The parameter is copied into \a copy
84  * which has to be allocated big enough by a caller, quotes are stripped in
85  * the copy and the copy is terminated by 0.
86  *
87  * On return \a params is set to next parameter or to NULL if last
88  * parameter is returned.
89  *
90  * \retval 0 if parameter is returned in \a copy
91  * \retval 1 otherwise
92  * \retval -EINVAL if unbalanced quota is found
93  */
94 int class_get_next_param(char **params, char *copy)
95 {
96         char *q1, *q2, *str;
97         int len;
98
99         str = *params;
100         while (*str == ' ')
101                 str++;
102
103         if (*str == '\0') {
104                 *params = NULL;
105                 return 1;
106         }
107
108         while (1) {
109                 q1 = strpbrk(str, " '\"");
110                 if (q1 == NULL) {
111                         len = strlen(str);
112                         memcpy(copy, str, len);
113                         copy[len] = '\0';
114                         *params = NULL;
115                         return 0;
116                 }
117                 len = q1 - str;
118                 if (*q1 == ' ') {
119                         memcpy(copy, str, len);
120                         copy[len] = '\0';
121                         *params = str + len;
122                         return 0;
123                 }
124
125                 memcpy(copy, str, len);
126                 copy += len;
127
128                 /* search for the matching closing quote */
129                 str = q1 + 1;
130                 q2 = strchr(str, *q1);
131                 if (q2 == NULL) {
132                         CERROR("Unbalanced quota in parameters: \"%s\"\n",
133                                *params);
134                         return -EINVAL;
135                 }
136                 len = q2 - str;
137                 memcpy(copy, str, len);
138                 copy += len;
139                 str = q2 + 1;
140         }
141         return 1;
142 }
143
144 /* returns 0 if this is the first key in the buffer, else 1.
145    valp points to first char after key. */
146 int class_match_param(char *buf, char *key, char **valp)
147 {
148         if (!buf)
149                 return 1;
150
151         if (memcmp(buf, key, strlen(key)) != 0)
152                 return 1;
153
154         if (valp)
155                 *valp = buf + strlen(key);
156
157         return 0;
158 }
159
160 /* 0 is good nid,
161    1 not found
162    < 0 error
163    endh is set to next separator */
164 int class_parse_nid(char *buf, lnet_nid_t *nid, char **endh)
165 {
166         char tmp, *endp;
167
168         if (!buf)
169                 return 1;
170         while (*buf == ',' || *buf == ':')
171                 buf++;
172         if (*buf == ' ' || *buf == '/' || *buf == '\0')
173                 return 1;
174
175         /* nid separators or end of nids */
176         endp = strpbrk(buf, ",: /");
177         if (endp == NULL)
178                 endp = buf + strlen(buf);
179
180         tmp = *endp;
181         *endp = '\0';
182         *nid = libcfs_str2nid(buf);
183         if (*nid == LNET_NID_ANY) {
184                 LCONSOLE_ERROR_MSG(0x159, "Can't parse NID '%s'\n", buf);
185                 *endp = tmp;
186                 return -EINVAL;
187         }
188         *endp = tmp;
189
190         if (endh)
191                 *endh = endp;
192         CDEBUG(D_INFO, "Nid %s\n", libcfs_nid2str(*nid));
193         return 0;
194 }
195
196 EXPORT_SYMBOL(class_find_param);
197 EXPORT_SYMBOL(class_get_next_param);
198 EXPORT_SYMBOL(class_match_param);
199 EXPORT_SYMBOL(class_parse_nid);
200
201 /********************** class fns **********************/
202
203 /**
204  * Create a new device and set the type, name and uuid.  If successful, the new
205  * device can be accessed by either name or uuid.
206  */
207 int class_attach(struct lustre_cfg *lcfg)
208 {
209         struct obd_device *obd = NULL;
210         char *typename, *name, *uuid;
211         int rc, len;
212         ENTRY;
213
214         if (!LUSTRE_CFG_BUFLEN(lcfg, 1)) {
215                 CERROR("No type passed!\n");
216                 RETURN(-EINVAL);
217         }
218         typename = lustre_cfg_string(lcfg, 1);
219
220         if (!LUSTRE_CFG_BUFLEN(lcfg, 0)) {
221                 CERROR("No name passed!\n");
222                 RETURN(-EINVAL);
223         }
224         name = lustre_cfg_string(lcfg, 0);
225
226         if (!LUSTRE_CFG_BUFLEN(lcfg, 2)) {
227                 CERROR("No UUID passed!\n");
228                 RETURN(-EINVAL);
229         }
230         uuid = lustre_cfg_string(lcfg, 2);
231
232         CDEBUG(D_IOCTL, "attach type %s name: %s uuid: %s\n",
233                MKSTR(typename), MKSTR(name), MKSTR(uuid));
234
235         obd = class_newdev(typename, name);
236         if (IS_ERR(obd)) {
237                 /* Already exists or out of obds */
238                 rc = PTR_ERR(obd);
239                 obd = NULL;
240                 CERROR("Cannot create device %s of type %s : %d\n",
241                        name, typename, rc);
242                 GOTO(out, rc);
243         }
244         LASSERTF(obd != NULL, "Cannot get obd device %s of type %s\n",
245                  name, typename);
246         LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
247                  "obd %p obd_magic %08X != %08X\n",
248                  obd, obd->obd_magic, OBD_DEVICE_MAGIC);
249         LASSERTF(strncmp(obd->obd_name, name, strlen(name)) == 0,
250                  "%p obd_name %s != %s\n", obd, obd->obd_name, name);
251
252         cfs_rwlock_init(&obd->obd_pool_lock);
253         obd->obd_pool_limit = 0;
254         obd->obd_pool_slv = 0;
255
256         CFS_INIT_LIST_HEAD(&obd->obd_exports);
257         CFS_INIT_LIST_HEAD(&obd->obd_unlinked_exports);
258         CFS_INIT_LIST_HEAD(&obd->obd_delayed_exports);
259         CFS_INIT_LIST_HEAD(&obd->obd_exports_timed);
260         CFS_INIT_LIST_HEAD(&obd->obd_nid_stats);
261         cfs_spin_lock_init(&obd->obd_nid_lock);
262         cfs_spin_lock_init(&obd->obd_dev_lock);
263         cfs_sema_init(&obd->obd_dev_sem, 1);
264         cfs_spin_lock_init(&obd->obd_osfs_lock);
265         /* obd->obd_osfs_age must be set to a value in the distant
266          * past to guarantee a fresh statfs is fetched on mount. */
267         obd->obd_osfs_age = cfs_time_shift_64(-1000);
268
269         /* XXX belongs in setup not attach  */
270         cfs_init_rwsem(&obd->obd_observer_link_sem);
271         /* recovery data */
272         cfs_init_timer(&obd->obd_recovery_timer);
273         cfs_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         CFS_INIT_LIST_HEAD(&obd->obd_evict_list);
280
281         llog_group_init(&obd->obd_olg, FILTER_GROUP_LLOG);
282
283         len = strlen(uuid);
284         if (len >= sizeof(obd->obd_uuid)) {
285                 CERROR("uuid must be < %d bytes long\n",
286                        (int)sizeof(obd->obd_uuid));
287                 GOTO(out, rc = -EINVAL);
288         }
289         memcpy(obd->obd_uuid.uuid, uuid, len);
290
291         /* do the attach */
292         if (OBP(obd, attach)) {
293                 rc = OBP(obd,attach)(obd, sizeof *lcfg, lcfg);
294                 if (rc)
295                         GOTO(out, rc = -EINVAL);
296         }
297
298         /* Detach drops this */
299         cfs_spin_lock(&obd->obd_dev_lock);
300         cfs_atomic_set(&obd->obd_refcount, 1);
301         cfs_spin_unlock(&obd->obd_dev_lock);
302         lu_ref_init(&obd->obd_reference);
303         lu_ref_add(&obd->obd_reference, "attach", obd);
304
305         obd->obd_attached = 1;
306         CDEBUG(D_IOCTL, "OBD: dev %d attached type %s with refcount %d\n",
307                obd->obd_minor, typename, cfs_atomic_read(&obd->obd_refcount));
308         RETURN(0);
309  out:
310         if (obd != NULL) {
311                 class_release_dev(obd);
312         }
313         return rc;
314 }
315
316 int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
317 {
318         int err = 0;
319         struct obd_export *exp;
320         ENTRY;
321
322         LASSERT(obd != NULL);
323         LASSERTF(obd == class_num2obd(obd->obd_minor),
324                  "obd %p != obd_devs[%d] %p\n",
325                  obd, obd->obd_minor, class_num2obd(obd->obd_minor));
326         LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
327                  "obd %p obd_magic %08x != %08x\n",
328                  obd, obd->obd_magic, OBD_DEVICE_MAGIC);
329
330         /* have we attached a type to this device? */
331         if (!obd->obd_attached) {
332                 CERROR("Device %d not attached\n", obd->obd_minor);
333                 RETURN(-ENODEV);
334         }
335
336         if (obd->obd_set_up) {
337                 CERROR("Device %d already setup (type %s)\n",
338                        obd->obd_minor, obd->obd_type->typ_name);
339                 RETURN(-EEXIST);
340         }
341
342         /* is someone else setting us up right now? (attach inits spinlock) */
343         cfs_spin_lock(&obd->obd_dev_lock);
344         if (obd->obd_starting) {
345                 cfs_spin_unlock(&obd->obd_dev_lock);
346                 CERROR("Device %d setup in progress (type %s)\n",
347                        obd->obd_minor, obd->obd_type->typ_name);
348                 RETURN(-EEXIST);
349         }
350         /* just leave this on forever.  I can't use obd_set_up here because
351            other fns check that status, and we're not actually set up yet. */
352         obd->obd_starting = 1;
353         obd->obd_uuid_hash = NULL;
354         obd->obd_nid_hash = NULL;
355         obd->obd_nid_stats_hash = NULL;
356         cfs_spin_unlock(&obd->obd_dev_lock);
357
358         /* create an uuid-export lustre hash */
359         obd->obd_uuid_hash = cfs_hash_create("UUID_HASH",
360                                              HASH_UUID_CUR_BITS,
361                                              HASH_UUID_MAX_BITS,
362                                              &uuid_hash_ops, CFS_HASH_REHASH);
363         if (!obd->obd_uuid_hash)
364                 GOTO(err_hash, err = -ENOMEM);
365
366         /* create a nid-export lustre hash */
367         obd->obd_nid_hash = cfs_hash_create("NID_HASH",
368                                             HASH_NID_CUR_BITS,
369                                             HASH_NID_MAX_BITS,
370                                             &nid_hash_ops, CFS_HASH_REHASH);
371         if (!obd->obd_nid_hash)
372                 GOTO(err_hash, err = -ENOMEM);
373
374         /* create a nid-stats lustre hash */
375         obd->obd_nid_stats_hash = cfs_hash_create("NID_STATS",
376                                                   HASH_NID_STATS_CUR_BITS,
377                                                   HASH_NID_STATS_MAX_BITS,
378                                                   &nid_stat_hash_ops, CFS_HASH_REHASH);
379         if (!obd->obd_nid_stats_hash)
380                 GOTO(err_hash, err = -ENOMEM);
381
382         exp = class_new_export(obd, &obd->obd_uuid);
383         if (IS_ERR(exp))
384                 GOTO(err_hash, err = PTR_ERR(exp));
385
386         obd->obd_self_export = exp;
387         cfs_list_del_init(&exp->exp_obd_chain_timed);
388         class_export_put(exp);
389
390         err = obd_setup(obd, lcfg);
391         if (err)
392                 GOTO(err_exp, err);
393
394         obd->obd_set_up = 1;
395
396         cfs_spin_lock(&obd->obd_dev_lock);
397         /* cleanup drops this */
398         class_incref(obd, "setup", obd);
399         cfs_spin_unlock(&obd->obd_dev_lock);
400
401         CDEBUG(D_IOCTL, "finished setup of obd %s (uuid %s)\n",
402                obd->obd_name, obd->obd_uuid.uuid);
403
404         RETURN(0);
405 err_exp:
406         if (obd->obd_self_export) {
407                 class_unlink_export(obd->obd_self_export);
408                 obd->obd_self_export = NULL;
409         }
410 err_hash:
411         if (obd->obd_uuid_hash) {
412                 cfs_hash_destroy(obd->obd_uuid_hash);
413                 obd->obd_uuid_hash = NULL;
414         }
415         if (obd->obd_nid_hash) {
416                 cfs_hash_destroy(obd->obd_nid_hash);
417                 obd->obd_nid_hash = NULL;
418         }
419         if (obd->obd_nid_stats_hash) {
420                 cfs_hash_destroy(obd->obd_nid_stats_hash);
421                 obd->obd_nid_stats_hash = NULL;
422         }
423         obd->obd_starting = 0;
424         CERROR("setup %s failed (%d)\n", obd->obd_name, err);
425         return err;
426 }
427
428 int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg)
429 {
430         ENTRY;
431
432         if (obd->obd_set_up) {
433                 CERROR("OBD device %d still set up\n", obd->obd_minor);
434                 RETURN(-EBUSY);
435         }
436
437         cfs_spin_lock(&obd->obd_dev_lock);
438         if (!obd->obd_attached) {
439                 cfs_spin_unlock(&obd->obd_dev_lock);
440                 CERROR("OBD device %d not attached\n", obd->obd_minor);
441                 RETURN(-ENODEV);
442         }
443         obd->obd_attached = 0;
444         cfs_spin_unlock(&obd->obd_dev_lock);
445
446         CDEBUG(D_IOCTL, "detach on obd %s (uuid %s)\n",
447                obd->obd_name, obd->obd_uuid.uuid);
448
449         class_decref(obd, "attach", obd);
450
451         /* not strictly necessary, but cleans up eagerly */
452         obd_zombie_impexp_cull();
453
454         RETURN(0);
455 }
456
457 int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg)
458 {
459         int err = 0;
460         char *flag;
461         ENTRY;
462
463         OBD_RACE(OBD_FAIL_LDLM_RECOV_CLIENTS);
464
465         if (!obd->obd_set_up) {
466                 CERROR("Device %d not setup\n", obd->obd_minor);
467                 RETURN(-ENODEV);
468         }
469
470         cfs_spin_lock(&obd->obd_dev_lock);
471         if (obd->obd_stopping) {
472                 cfs_spin_unlock(&obd->obd_dev_lock);
473                 CERROR("OBD %d already stopping\n", obd->obd_minor);
474                 RETURN(-ENODEV);
475         }
476         /* Leave this on forever */
477         obd->obd_stopping = 1;
478         cfs_spin_unlock(&obd->obd_dev_lock);
479
480         if (lcfg->lcfg_bufcount >= 2 && LUSTRE_CFG_BUFLEN(lcfg, 1) > 0) {
481                 for (flag = lustre_cfg_string(lcfg, 1); *flag != 0; flag++)
482                         switch (*flag) {
483                         case 'F':
484                                 obd->obd_force = 1;
485                                 break;
486                         case 'A':
487                                 LCONSOLE_WARN("Failing over %s\n",
488                                               obd->obd_name);
489                                 obd->obd_fail = 1;
490                                 obd->obd_no_transno = 1;
491                                 obd->obd_no_recov = 1;
492                                 if (OBP(obd, iocontrol)) {
493                                         obd_iocontrol(OBD_IOC_SYNC,
494                                                       obd->obd_self_export,
495                                                       0, NULL, NULL);
496                                         /* Set the obd readonly if we can */
497                                         obd_iocontrol(OBD_IOC_SET_READONLY,
498                                                       obd->obd_self_export,
499                                                       0, NULL, NULL);
500                                 }
501                                 break;
502                         default:
503                                 CERROR("Unrecognised flag '%c'\n", *flag);
504                         }
505         }
506
507         LASSERT(obd->obd_self_export);
508
509         /* The three references that should be remaining are the
510          * obd_self_export and the attach and setup references. */
511         if (cfs_atomic_read(&obd->obd_refcount) > 3) {
512                 /* refcounf - 3 might be the number of real exports
513                    (excluding self export). But class_incref is called
514                    by other things as well, so don't count on it. */
515                 CDEBUG(D_IOCTL, "%s: forcing exports to disconnect: %d\n",
516                        obd->obd_name, cfs_atomic_read(&obd->obd_refcount) - 3);
517                 dump_exports(obd, 0);
518                 class_disconnect_exports(obd);
519         }
520
521         /* destroy an uuid-export hash body */
522         if (obd->obd_uuid_hash) {
523                 cfs_hash_destroy(obd->obd_uuid_hash);
524                 obd->obd_uuid_hash = NULL;
525         }
526
527         /* destroy a nid-export hash body */
528         if (obd->obd_nid_hash) {
529                 cfs_hash_destroy(obd->obd_nid_hash);
530                 obd->obd_nid_hash = NULL;
531         }
532
533         /* destroy a nid-stats hash body */
534         if (obd->obd_nid_stats_hash) {
535                 cfs_hash_destroy(obd->obd_nid_stats_hash);
536                 obd->obd_nid_stats_hash = NULL;
537         }
538
539         /* Precleanup, we must make sure all exports get destroyed. */
540         err = obd_precleanup(obd, OBD_CLEANUP_EXPORTS);
541         if (err)
542                 CERROR("Precleanup %s returned %d\n",
543                        obd->obd_name, err);
544         class_decref(obd, "setup", obd);
545         obd->obd_set_up = 0;
546         RETURN(0);
547 }
548
549 struct obd_device *class_incref(struct obd_device *obd,
550                                 const char *scope, const void *source)
551 {
552         lu_ref_add_atomic(&obd->obd_reference, scope, source);
553         cfs_atomic_inc(&obd->obd_refcount);
554         CDEBUG(D_INFO, "incref %s (%p) now %d\n", obd->obd_name, obd,
555                cfs_atomic_read(&obd->obd_refcount));
556
557         return obd;
558 }
559
560 void class_decref(struct obd_device *obd, const char *scope, const void *source)
561 {
562         int err;
563         int refs;
564
565         cfs_spin_lock(&obd->obd_dev_lock);
566         cfs_atomic_dec(&obd->obd_refcount);
567         refs = cfs_atomic_read(&obd->obd_refcount);
568         cfs_spin_unlock(&obd->obd_dev_lock);
569         lu_ref_del(&obd->obd_reference, scope, source);
570
571         CDEBUG(D_INFO, "Decref %s (%p) now %d\n", obd->obd_name, obd, refs);
572
573         if ((refs == 1) && obd->obd_stopping) {
574                 /* All exports have been destroyed; there should
575                    be no more in-progress ops by this point.*/
576
577                 cfs_spin_lock(&obd->obd_self_export->exp_lock);
578                 obd->obd_self_export->exp_flags |= exp_flags_from_obd(obd);
579                 cfs_spin_unlock(&obd->obd_self_export->exp_lock);
580
581                 /* note that we'll recurse into class_decref again */
582                 class_unlink_export(obd->obd_self_export);
583                 return;
584         }
585
586         if (refs == 0) {
587                 CDEBUG(D_CONFIG, "finishing cleanup of obd %s (%s)\n",
588                        obd->obd_name, obd->obd_uuid.uuid);
589                 LASSERT(!obd->obd_attached);
590                 if (obd->obd_stopping) {
591                         /* If we're not stopping, we were never set up */
592                         err = obd_cleanup(obd);
593                         if (err)
594                                 CERROR("Cleanup %s returned %d\n",
595                                        obd->obd_name, err);
596                 }
597                 if (OBP(obd, detach)) {
598                         err = OBP(obd, detach)(obd);
599                         if (err)
600                                 CERROR("Detach returned %d\n", err);
601                 }
602                 class_release_dev(obd);
603         }
604 }
605
606 int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
607 {
608         struct obd_import *imp;
609         struct obd_uuid uuid;
610         int rc;
611         ENTRY;
612
613         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
614             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
615                 CERROR("invalid conn_uuid\n");
616                 RETURN(-EINVAL);
617         }
618         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
619             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) &&
620             strcmp(obd->obd_type->typ_name, LUSTRE_MGC_NAME)) {
621                 CERROR("can't add connection on non-client dev\n");
622                 RETURN(-EINVAL);
623         }
624
625         imp = obd->u.cli.cl_import;
626         if (!imp) {
627                 CERROR("try to add conn on immature client dev\n");
628                 RETURN(-EINVAL);
629         }
630
631         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
632         rc = obd_add_conn(imp, &uuid, lcfg->lcfg_num);
633
634         RETURN(rc);
635 }
636
637 int class_del_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
638 {
639         struct obd_import *imp;
640         struct obd_uuid uuid;
641         int rc;
642         ENTRY;
643
644         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
645             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
646                 CERROR("invalid conn_uuid\n");
647                 RETURN(-EINVAL);
648         }
649         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
650             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME)) {
651                 CERROR("can't del connection on non-client dev\n");
652                 RETURN(-EINVAL);
653         }
654
655         imp = obd->u.cli.cl_import;
656         if (!imp) {
657                 CERROR("try to del conn on immature client dev\n");
658                 RETURN(-EINVAL);
659         }
660
661         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
662         rc = obd_del_conn(imp, &uuid);
663
664         RETURN(rc);
665 }
666
667 CFS_LIST_HEAD(lustre_profile_list);
668
669 struct lustre_profile *class_get_profile(const char * prof)
670 {
671         struct lustre_profile *lprof;
672
673         ENTRY;
674         cfs_list_for_each_entry(lprof, &lustre_profile_list, lp_list) {
675                 if (!strcmp(lprof->lp_profile, prof)) {
676                         RETURN(lprof);
677                 }
678         }
679         RETURN(NULL);
680 }
681
682 int class_add_profile(int proflen, char *prof, int osclen, char *osc,
683                       int mdclen, char *mdc)
684 {
685         struct lustre_profile *lprof;
686         int err = 0;
687         ENTRY;
688
689         CDEBUG(D_CONFIG, "Add profile %s\n", prof);
690
691         OBD_ALLOC(lprof, sizeof(*lprof));
692         if (lprof == NULL)
693                 RETURN(-ENOMEM);
694         CFS_INIT_LIST_HEAD(&lprof->lp_list);
695
696         LASSERT(proflen == (strlen(prof) + 1));
697         OBD_ALLOC(lprof->lp_profile, proflen);
698         if (lprof->lp_profile == NULL)
699                 GOTO(out, err = -ENOMEM);
700         memcpy(lprof->lp_profile, prof, proflen);
701
702         LASSERT(osclen == (strlen(osc) + 1));
703         OBD_ALLOC(lprof->lp_dt, osclen);
704         if (lprof->lp_dt == NULL)
705                 GOTO(out, err = -ENOMEM);
706         memcpy(lprof->lp_dt, osc, osclen);
707
708         if (mdclen > 0) {
709                 LASSERT(mdclen == (strlen(mdc) + 1));
710                 OBD_ALLOC(lprof->lp_md, mdclen);
711                 if (lprof->lp_md == NULL)
712                         GOTO(out, err = -ENOMEM);
713                 memcpy(lprof->lp_md, mdc, mdclen);
714         }
715
716         cfs_list_add(&lprof->lp_list, &lustre_profile_list);
717         RETURN(err);
718
719 out:
720         if (lprof->lp_md)
721                 OBD_FREE(lprof->lp_md, mdclen);
722         if (lprof->lp_dt)
723                 OBD_FREE(lprof->lp_dt, osclen);
724         if (lprof->lp_profile)
725                 OBD_FREE(lprof->lp_profile, proflen);
726         OBD_FREE(lprof, sizeof(*lprof));
727         RETURN(err);
728 }
729
730 void class_del_profile(const char *prof)
731 {
732         struct lustre_profile *lprof;
733         ENTRY;
734
735         CDEBUG(D_CONFIG, "Del profile %s\n", prof);
736
737         lprof = class_get_profile(prof);
738         if (lprof) {
739                 cfs_list_del(&lprof->lp_list);
740                 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
741                 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
742                 if (lprof->lp_md)
743                         OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
744                 OBD_FREE(lprof, sizeof *lprof);
745         }
746         EXIT;
747 }
748
749 /* COMPAT_146 */
750 void class_del_profiles(void)
751 {
752         struct lustre_profile *lprof, *n;
753         ENTRY;
754
755         cfs_list_for_each_entry_safe(lprof, n, &lustre_profile_list, lp_list) {
756                 cfs_list_del(&lprof->lp_list);
757                 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
758                 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
759                 if (lprof->lp_md)
760                         OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
761                 OBD_FREE(lprof, sizeof *lprof);
762         }
763         EXIT;
764 }
765
766 static int class_set_global(char *ptr, int val) {
767         ENTRY;
768
769         if (class_match_param(ptr, PARAM_AT_MIN, NULL) == 0)
770             at_min = val;
771         else if (class_match_param(ptr, PARAM_AT_MAX, NULL) == 0)
772                 at_max = val;
773         else if (class_match_param(ptr, PARAM_AT_EXTRA, NULL) == 0)
774                 at_extra = val;
775         else if (class_match_param(ptr, PARAM_AT_EARLY_MARGIN, NULL) == 0)
776                 at_early_margin = val;
777         else if (class_match_param(ptr, PARAM_AT_HISTORY, NULL) == 0)
778                 at_history = val;
779         else
780                 RETURN(-EINVAL);
781
782         CDEBUG(D_IOCTL, "global %s = %d\n", ptr, val);
783
784         RETURN(0);
785 }
786
787
788 /* We can't call ll_process_config directly because it lives in a module that
789    must be loaded after this one. */
790 static int (*client_process_config)(struct lustre_cfg *lcfg) = NULL;
791
792 void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg))
793 {
794         client_process_config = cpc;
795 }
796 EXPORT_SYMBOL(lustre_register_client_process_config);
797
798 int class_process_config(struct lustre_cfg *lcfg)
799 {
800         struct obd_device *obd;
801         int err;
802
803         LASSERT(lcfg && !IS_ERR(lcfg));
804         CDEBUG(D_IOCTL, "processing cmd: %x\n", lcfg->lcfg_command);
805
806         /* Commands that don't need a device */
807         switch(lcfg->lcfg_command) {
808         case LCFG_ATTACH: {
809                 err = class_attach(lcfg);
810                 GOTO(out, err);
811         }
812         case LCFG_ADD_UUID: {
813                 CDEBUG(D_IOCTL, "adding mapping from uuid %s to nid "LPX64
814                        " (%s)\n", lustre_cfg_string(lcfg, 1),
815                        lcfg->lcfg_nid, libcfs_nid2str(lcfg->lcfg_nid));
816
817                 err = class_add_uuid(lustre_cfg_string(lcfg, 1), lcfg->lcfg_nid);
818                 GOTO(out, err);
819         }
820         case LCFG_DEL_UUID: {
821                 CDEBUG(D_IOCTL, "removing mappings for uuid %s\n",
822                        (lcfg->lcfg_bufcount < 2 || LUSTRE_CFG_BUFLEN(lcfg, 1) == 0)
823                        ? "<all uuids>" : lustre_cfg_string(lcfg, 1));
824
825                 err = class_del_uuid(lustre_cfg_string(lcfg, 1));
826                 GOTO(out, err);
827         }
828         case LCFG_MOUNTOPT: {
829                 CDEBUG(D_IOCTL, "mountopt: profile %s osc %s mdc %s\n",
830                        lustre_cfg_string(lcfg, 1),
831                        lustre_cfg_string(lcfg, 2),
832                        lustre_cfg_string(lcfg, 3));
833                 /* set these mount options somewhere, so ll_fill_super
834                  * can find them. */
835                 err = class_add_profile(LUSTRE_CFG_BUFLEN(lcfg, 1),
836                                         lustre_cfg_string(lcfg, 1),
837                                         LUSTRE_CFG_BUFLEN(lcfg, 2),
838                                         lustre_cfg_string(lcfg, 2),
839                                         LUSTRE_CFG_BUFLEN(lcfg, 3),
840                                         lustre_cfg_string(lcfg, 3));
841                 GOTO(out, err);
842         }
843         case LCFG_DEL_MOUNTOPT: {
844                 CDEBUG(D_IOCTL, "mountopt: profile %s\n",
845                        lustre_cfg_string(lcfg, 1));
846                 class_del_profile(lustre_cfg_string(lcfg, 1));
847                 GOTO(out, err = 0);
848         }
849         case LCFG_SET_TIMEOUT: {
850                 CDEBUG(D_IOCTL, "changing lustre timeout from %d to %d\n",
851                        obd_timeout, lcfg->lcfg_num);
852                 obd_timeout = max(lcfg->lcfg_num, 1U);
853                 GOTO(out, err = 0);
854         }
855         case LCFG_SET_LDLM_TIMEOUT: {
856                 CDEBUG(D_IOCTL, "changing lustre ldlm_timeout from %d to %d\n",
857                        ldlm_timeout, lcfg->lcfg_num);
858                 ldlm_timeout = max(lcfg->lcfg_num, 1U);
859                 if (ldlm_timeout >= obd_timeout)
860                         ldlm_timeout = max(obd_timeout / 3, 1U);
861
862                 GOTO(out, err = 0);
863         }
864         case LCFG_SET_UPCALL: {
865                 LCONSOLE_ERROR_MSG(0x15a, "recovery upcall is deprecated\n");
866                 /* COMPAT_146 Don't fail on old configs */
867                 GOTO(out, err = 0);
868         }
869         case LCFG_MARKER: {
870                 struct cfg_marker *marker;
871                 marker = lustre_cfg_buf(lcfg, 1);
872                 CDEBUG(D_IOCTL, "marker %d (%#x) %.16s %s\n", marker->cm_step,
873                        marker->cm_flags, marker->cm_tgtname, marker->cm_comment);
874                 GOTO(out, err = 0);
875         }
876         case LCFG_PARAM: {
877                 char *tmp;
878                 /* llite has no obd */
879                 if ((class_match_param(lustre_cfg_string(lcfg, 1),
880                                        PARAM_LLITE, 0) == 0) &&
881                     client_process_config) {
882                         err = (*client_process_config)(lcfg);
883                         GOTO(out, err);
884                 } else if ((class_match_param(lustre_cfg_string(lcfg, 1),
885                                               PARAM_SYS, &tmp) == 0)) {
886                         /* Global param settings */
887                         err = class_set_global(tmp, lcfg->lcfg_num);
888                         /* Note that since LCFG_PARAM is LCFG_REQUIRED, new
889                            unknown globals would cause config to fail */
890                         if (err)
891                                 CWARN("Ignoring unknown param %s\n", tmp);
892                         GOTO(out, 0);
893                 }
894
895                 /* Fall through */
896                 break;
897         }
898         }
899
900         /* Commands that require a device */
901         obd = class_name2obd(lustre_cfg_string(lcfg, 0));
902         if (obd == NULL) {
903                 if (!LUSTRE_CFG_BUFLEN(lcfg, 0))
904                         CERROR("this lcfg command requires a device name\n");
905                 else
906                         CERROR("no device for: %s\n",
907                                lustre_cfg_string(lcfg, 0));
908
909                 GOTO(out, err = -EINVAL);
910         }
911
912         switch(lcfg->lcfg_command) {
913         case LCFG_SETUP: {
914                 err = class_setup(obd, lcfg);
915                 GOTO(out, err);
916         }
917         case LCFG_DETACH: {
918                 err = class_detach(obd, lcfg);
919                 GOTO(out, err = 0);
920         }
921         case LCFG_CLEANUP: {
922                 err = class_cleanup(obd, lcfg);
923                 GOTO(out, err = 0);
924         }
925         case LCFG_ADD_CONN: {
926                 err = class_add_conn(obd, lcfg);
927                 GOTO(out, err = 0);
928         }
929         case LCFG_DEL_CONN: {
930                 err = class_del_conn(obd, lcfg);
931                 GOTO(out, err = 0);
932         }
933         case LCFG_POOL_NEW: {
934                 err = obd_pool_new(obd, lustre_cfg_string(lcfg, 2));
935                 GOTO(out, err = 0);
936                 break;
937         }
938         case LCFG_POOL_ADD: {
939                 err = obd_pool_add(obd, lustre_cfg_string(lcfg, 2),
940                                    lustre_cfg_string(lcfg, 3));
941                 GOTO(out, err = 0);
942                 break;
943         }
944         case LCFG_POOL_REM: {
945                 err = obd_pool_rem(obd, lustre_cfg_string(lcfg, 2),
946                                    lustre_cfg_string(lcfg, 3));
947                 GOTO(out, err = 0);
948                 break;
949         }
950         case LCFG_POOL_DEL: {
951                 err = obd_pool_del(obd, lustre_cfg_string(lcfg, 2));
952                 GOTO(out, err = 0);
953                 break;
954         }
955         default: {
956                 err = obd_process_config(obd, sizeof(*lcfg), lcfg);
957                 GOTO(out, err);
958
959         }
960         }
961 out:
962         if ((err < 0) && !(lcfg->lcfg_command & LCFG_REQUIRED)) {
963                 CWARN("Ignoring error %d on optional command %#x\n", err,
964                       lcfg->lcfg_command);
965                 err = 0;
966         }
967         return err;
968 }
969
970 int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
971                              struct lustre_cfg *lcfg, void *data)
972 {
973 #ifdef __KERNEL__
974         struct lprocfs_vars *var;
975         char *key, *sval;
976         int i, keylen, vallen;
977         int matched = 0, j = 0;
978         int rc = 0;
979         int skip = 0;
980         ENTRY;
981
982         if (lcfg->lcfg_command != LCFG_PARAM) {
983                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
984                 RETURN(-EINVAL);
985         }
986
987         /* e.g. tunefs.lustre --param mdt.group_upcall=foo /r/tmp/lustre-mdt
988            or   lctl conf_param lustre-MDT0000.mdt.group_upcall=bar
989            or   lctl conf_param lustre-OST0000.osc.max_dirty_mb=36 */
990         for (i = 1; i < lcfg->lcfg_bufcount; i++) {
991                 key = lustre_cfg_buf(lcfg, i);
992                 /* Strip off prefix */
993                 class_match_param(key, prefix, &key);
994                 sval = strchr(key, '=');
995                 if (!sval || (*(sval + 1) == 0)) {
996                         CERROR("Can't parse param %s (missing '=')\n", key);
997                         /* rc = -EINVAL;        continue parsing other params */
998                         continue;
999                 }
1000                 keylen = sval - key;
1001                 sval++;
1002                 vallen = strlen(sval);
1003                 matched = 0;
1004                 j = 0;
1005                 /* Search proc entries */
1006                 while (lvars[j].name) {
1007                         var = &lvars[j];
1008                         if (class_match_param(key, (char *)var->name, 0) == 0 &&
1009                             keylen == strlen(var->name)) {
1010                                 matched++;
1011                                 rc = -EROFS;
1012                                 if (var->write_fptr) {
1013                                         mm_segment_t oldfs;
1014                                         oldfs = get_fs();
1015                                         set_fs(KERNEL_DS);
1016                                         rc = (var->write_fptr)(NULL, sval,
1017                                                                vallen, data);
1018                                         set_fs(oldfs);
1019                                 }
1020                                 break;
1021                         }
1022                         j++;
1023                 }
1024                 if (!matched) {
1025                         /* If the prefix doesn't match, return error so we
1026                            can pass it down the stack */
1027                         if (strnchr(key, keylen, '.'))
1028                             RETURN(-ENOSYS);
1029                         CERROR("%s: unknown param %s\n",
1030                                (char *)lustre_cfg_string(lcfg, 0), key);
1031                         /* rc = -EINVAL;        continue parsing other params */
1032                         skip++;
1033                 } else if (rc < 0) {
1034                         CERROR("writing proc entry %s err %d\n",
1035                                var->name, rc);
1036                         rc = 0;
1037                 } else {
1038                         LCONSOLE_INFO("%s.%.*s: set parameter %.*s=%s\n",
1039                                       lustre_cfg_string(lcfg, 0),
1040                                       (int)strlen(prefix) - 1, prefix,
1041                                       (int)(sval - key - 1), key, sval);
1042                 }
1043         }
1044
1045         if (rc > 0)
1046                 rc = 0;
1047         if (!rc && skip)
1048                 rc = skip;
1049         RETURN(rc);
1050 #else
1051         CDEBUG(D_CONFIG, "liblustre can't process params.\n");
1052         /* Don't throw config error */
1053         RETURN(0);
1054 #endif
1055 }
1056
1057 int class_config_dump_handler(struct llog_handle * handle,
1058                               struct llog_rec_hdr *rec, void *data);
1059
1060 #ifdef __KERNEL__
1061 extern int lustre_check_exclusion(struct super_block *sb, char *svname);
1062 #else
1063 #define lustre_check_exclusion(a,b)  0
1064 #endif
1065
1066 static int class_config_llog_handler(struct llog_handle * handle,
1067                                      struct llog_rec_hdr *rec, void *data)
1068 {
1069         struct config_llog_instance *clli = data;
1070         int cfg_len = rec->lrh_len;
1071         char *cfg_buf = (char*) (rec + 1);
1072         int rc = 0;
1073         ENTRY;
1074
1075         //class_config_dump_handler(handle, rec, data);
1076
1077         switch (rec->lrh_type) {
1078         case OBD_CFG_REC: {
1079                 struct lustre_cfg *lcfg, *lcfg_new;
1080                 struct lustre_cfg_bufs bufs;
1081                 char *inst_name = NULL;
1082                 int inst_len = 0;
1083                 int inst = 0, swab = 0;
1084
1085                 lcfg = (struct lustre_cfg *)cfg_buf;
1086                 if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION)) {
1087                         lustre_swab_lustre_cfg(lcfg);
1088                         swab = 1;
1089                 }
1090
1091                 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1092                 if (rc)
1093                         GOTO(out, rc);
1094
1095                 /* Figure out config state info */
1096                 if (lcfg->lcfg_command == LCFG_MARKER) {
1097                         struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1098                         lustre_swab_cfg_marker(marker, swab,
1099                                                LUSTRE_CFG_BUFLEN(lcfg, 1));
1100                         CDEBUG(D_CONFIG, "Marker, inst_flg=%#x mark_flg=%#x\n",
1101                                clli->cfg_flags, marker->cm_flags);
1102                         if (marker->cm_flags & CM_START) {
1103                                 /* all previous flags off */
1104                                 clli->cfg_flags = CFG_F_MARKER;
1105                                 if (marker->cm_flags & CM_SKIP) {
1106                                         clli->cfg_flags |= CFG_F_SKIP;
1107                                         CDEBUG(D_CONFIG, "SKIP #%d\n",
1108                                                marker->cm_step);
1109                                 } else if ((marker->cm_flags & CM_EXCLUDE) ||
1110                                            (clli->cfg_sb &&
1111                                             lustre_check_exclusion(clli->cfg_sb,
1112                                                          marker->cm_tgtname))) {
1113                                         clli->cfg_flags |= CFG_F_EXCLUDE;
1114                                         CDEBUG(D_CONFIG, "EXCLUDE %d\n",
1115                                                marker->cm_step);
1116                                 }
1117                         } else if (marker->cm_flags & CM_END) {
1118                                 clli->cfg_flags = 0;
1119                         }
1120                 }
1121                 /* A config command without a start marker before it is
1122                    illegal (post 146) */
1123                 if (!(clli->cfg_flags & CFG_F_COMPAT146) &&
1124                     !(clli->cfg_flags & CFG_F_MARKER) &&
1125                     (lcfg->lcfg_command != LCFG_MARKER)) {
1126                         CWARN("Config not inside markers, ignoring! "
1127                               "(inst: %s, uuid: %s, flags: %#x)\n",
1128                               clli->cfg_instance ? clli->cfg_instance : "<null>",
1129                               clli->cfg_uuid.uuid, clli->cfg_flags);
1130                         clli->cfg_flags |= CFG_F_SKIP;
1131                 }
1132                 if (clli->cfg_flags & CFG_F_SKIP) {
1133                         CDEBUG(D_CONFIG, "skipping %#x\n",
1134                                clli->cfg_flags);
1135                         rc = 0;
1136                         /* No processing! */
1137                         break;
1138                 }
1139
1140                 /*
1141                  * For interoperability between 1.8 and 2.0,
1142                  * rename "mds" obd device type to "mdt".
1143                  */
1144                 {
1145                         char *typename = lustre_cfg_string(lcfg, 1);
1146                         char *index = lustre_cfg_string(lcfg, 2);
1147
1148                         if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
1149                              strcmp(typename, "mds") == 0)) {
1150                                 CWARN("For 1.8 interoperability, rename obd "
1151                                        "type from mds to mdt\n");
1152                                 typename[2] = 't';
1153                         }
1154                         if ((lcfg->lcfg_command == LCFG_SETUP && index &&
1155                              strcmp(index, "type") == 0)) {
1156                                 CDEBUG(D_INFO, "For 1.8 interoperability, "
1157                                        "set this index to '0'\n");
1158                                 index[0] = '0';
1159                                 index[1] = 0;
1160                         }
1161                 }
1162
1163                 if ((clli->cfg_flags & CFG_F_EXCLUDE) &&
1164                     (lcfg->lcfg_command == LCFG_LOV_ADD_OBD))
1165                         /* Add inactive instead */
1166                         lcfg->lcfg_command = LCFG_LOV_ADD_INA;
1167
1168                 lustre_cfg_bufs_init(&bufs, lcfg);
1169
1170                 if (clli && clli->cfg_instance &&
1171                     LUSTRE_CFG_BUFLEN(lcfg, 0) > 0){
1172                         inst = 1;
1173                         inst_len = LUSTRE_CFG_BUFLEN(lcfg, 0) +
1174                                 strlen(clli->cfg_instance) + 1;
1175                         OBD_ALLOC(inst_name, inst_len);
1176                         if (inst_name == NULL)
1177                                 GOTO(out, rc = -ENOMEM);
1178                         sprintf(inst_name, "%s-%s",
1179                                 lustre_cfg_string(lcfg, 0),
1180                                 clli->cfg_instance);
1181                         lustre_cfg_bufs_set_string(&bufs, 0, inst_name);
1182                         CDEBUG(D_CONFIG, "cmd %x, instance name: %s\n",
1183                                lcfg->lcfg_command, inst_name);
1184                 }
1185
1186                 /* we override the llog's uuid for clients, to insure they
1187                 are unique */
1188                 if (clli && clli->cfg_instance &&
1189                     lcfg->lcfg_command == LCFG_ATTACH) {
1190                         lustre_cfg_bufs_set_string(&bufs, 2,
1191                                                    clli->cfg_uuid.uuid);
1192                 }
1193                 /*
1194                  * sptlrpc config record, we expect 2 data segments:
1195                  *  [0]: fs_name/target_name,
1196                  *  [1]: rule string
1197                  * moving them to index [1] and [2], and insert MGC's
1198                  * obdname at index [0].
1199                  */
1200                 if (clli && clli->cfg_instance == NULL &&
1201                     lcfg->lcfg_command == LCFG_SPTLRPC_CONF) {
1202                         lustre_cfg_bufs_set(&bufs, 2, bufs.lcfg_buf[1],
1203                                             bufs.lcfg_buflen[1]);
1204                         lustre_cfg_bufs_set(&bufs, 1, bufs.lcfg_buf[0],
1205                                             bufs.lcfg_buflen[0]);
1206                         lustre_cfg_bufs_set_string(&bufs, 0,
1207                                                    clli->cfg_obdname);
1208                 }
1209
1210                 lcfg_new = lustre_cfg_new(lcfg->lcfg_command, &bufs);
1211
1212                 lcfg_new->lcfg_num   = lcfg->lcfg_num;
1213                 lcfg_new->lcfg_flags = lcfg->lcfg_flags;
1214
1215                 /* XXX Hack to try to remain binary compatible with
1216                  * pre-newconfig logs */
1217                 if (lcfg->lcfg_nal != 0 &&      /* pre-newconfig log? */
1218                     (lcfg->lcfg_nid >> 32) == 0) {
1219                         __u32 addr = (__u32)(lcfg->lcfg_nid & 0xffffffff);
1220
1221                         lcfg_new->lcfg_nid =
1222                                 LNET_MKNID(LNET_MKNET(lcfg->lcfg_nal, 0), addr);
1223                         CWARN("Converted pre-newconfig NAL %d NID %x to %s\n",
1224                               lcfg->lcfg_nal, addr,
1225                               libcfs_nid2str(lcfg_new->lcfg_nid));
1226                 } else {
1227                         lcfg_new->lcfg_nid = lcfg->lcfg_nid;
1228                 }
1229
1230                 lcfg_new->lcfg_nal = 0; /* illegal value for obsolete field */
1231
1232                 rc = class_process_config(lcfg_new);
1233                 lustre_cfg_free(lcfg_new);
1234
1235                 if (inst)
1236                         OBD_FREE(inst_name, inst_len);
1237                 break;
1238         }
1239         default:
1240                 CERROR("Unknown llog record type %#x encountered\n",
1241                        rec->lrh_type);
1242                 break;
1243         }
1244 out:
1245         if (rc) {
1246                 CERROR("Err %d on cfg command:\n", rc);
1247                 class_config_dump_handler(handle, rec, data);
1248         }
1249         RETURN(rc);
1250 }
1251
1252 int class_config_parse_llog(struct llog_ctxt *ctxt, char *name,
1253                             struct config_llog_instance *cfg)
1254 {
1255         struct llog_process_cat_data cd = {0, 0};
1256         struct llog_handle *llh;
1257         int rc, rc2;
1258         ENTRY;
1259
1260         CDEBUG(D_INFO, "looking up llog %s\n", name);
1261         rc = llog_create(ctxt, &llh, NULL, name);
1262         if (rc)
1263                 RETURN(rc);
1264
1265         rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
1266         if (rc)
1267                 GOTO(parse_out, rc);
1268
1269         /* continue processing from where we last stopped to end-of-log */
1270         if (cfg)
1271                 cd.lpcd_first_idx = cfg->cfg_last_idx;
1272         cd.lpcd_last_idx = 0;
1273
1274         rc = llog_process(llh, class_config_llog_handler, cfg, &cd);
1275
1276         CDEBUG(D_CONFIG, "Processed log %s gen %d-%d (rc=%d)\n", name,
1277                cd.lpcd_first_idx + 1, cd.lpcd_last_idx, rc);
1278
1279         if (cfg)
1280                 cfg->cfg_last_idx = cd.lpcd_last_idx;
1281
1282 parse_out:
1283         rc2 = llog_close(llh);
1284         if (rc == 0)
1285                 rc = rc2;
1286
1287         RETURN(rc);
1288 }
1289
1290 int class_config_dump_handler(struct llog_handle * handle,
1291                               struct llog_rec_hdr *rec, void *data)
1292 {
1293         int cfg_len = rec->lrh_len;
1294         char *cfg_buf = (char*) (rec + 1);
1295         char *outstr, *ptr, *end;
1296         int rc = 0;
1297         ENTRY;
1298
1299         OBD_ALLOC(outstr, 256);
1300         end = outstr + 256;
1301         ptr = outstr;
1302         if (!outstr) {
1303                 RETURN(-ENOMEM);
1304         }
1305         if (rec->lrh_type == OBD_CFG_REC) {
1306                 struct lustre_cfg *lcfg;
1307                 int i;
1308
1309                 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1310                 if (rc)
1311                         GOTO(out, rc);
1312                 lcfg = (struct lustre_cfg *)cfg_buf;
1313
1314                 ptr += snprintf(ptr, end-ptr, "cmd=%05x ",
1315                                 lcfg->lcfg_command);
1316                 if (lcfg->lcfg_flags) {
1317                         ptr += snprintf(ptr, end-ptr, "flags=%#08x ",
1318                                         lcfg->lcfg_flags);
1319                 }
1320                 if (lcfg->lcfg_num) {
1321                         ptr += snprintf(ptr, end-ptr, "num=%#08x ",
1322                                         lcfg->lcfg_num);
1323                 }
1324                 if (lcfg->lcfg_nid) {
1325                         ptr += snprintf(ptr, end-ptr, "nid=%s("LPX64")\n     ",
1326                                         libcfs_nid2str(lcfg->lcfg_nid),
1327                                         lcfg->lcfg_nid);
1328                 }
1329                 if (lcfg->lcfg_command == LCFG_MARKER) {
1330                         struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1331                         ptr += snprintf(ptr, end-ptr, "marker=%d(%#x)%s '%s'",
1332                                         marker->cm_step, marker->cm_flags,
1333                                         marker->cm_tgtname, marker->cm_comment);
1334                 } else {
1335                         for (i = 0; i <  lcfg->lcfg_bufcount; i++) {
1336                                 ptr += snprintf(ptr, end-ptr, "%d:%s  ", i,
1337                                                 lustre_cfg_string(lcfg, i));
1338                         }
1339                 }
1340                 LCONSOLE(D_WARNING, "   %s\n", outstr);
1341         } else {
1342                 LCONSOLE(D_WARNING, "unhandled lrh_type: %#x\n", rec->lrh_type);
1343                 rc = -EINVAL;
1344         }
1345 out:
1346         OBD_FREE(outstr, 256);
1347         RETURN(rc);
1348 }
1349
1350 int class_config_dump_llog(struct llog_ctxt *ctxt, char *name,
1351                            struct config_llog_instance *cfg)
1352 {
1353         struct llog_handle *llh;
1354         int rc, rc2;
1355         ENTRY;
1356
1357         LCONSOLE_INFO("Dumping config log %s\n", name);
1358
1359         rc = llog_create(ctxt, &llh, NULL, name);
1360         if (rc)
1361                 RETURN(rc);
1362
1363         rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
1364         if (rc)
1365                 GOTO(parse_out, rc);
1366
1367         rc = llog_process(llh, class_config_dump_handler, cfg, NULL);
1368 parse_out:
1369         rc2 = llog_close(llh);
1370         if (rc == 0)
1371                 rc = rc2;
1372
1373         LCONSOLE_INFO("End config log %s\n", name);
1374         RETURN(rc);
1375
1376 }
1377
1378 /* Cleanup and detach */
1379 int class_manual_cleanup(struct obd_device *obd)
1380 {
1381         char                    flags[3] = "";
1382         struct lustre_cfg      *lcfg;
1383         struct lustre_cfg_bufs  bufs;
1384         int                     rc;
1385         ENTRY;
1386
1387         if (!obd) {
1388                 CERROR("empty cleanup\n");
1389                 RETURN(-EALREADY);
1390         }
1391
1392         if (obd->obd_force)
1393                 strcat(flags, "F");
1394         if (obd->obd_fail)
1395                 strcat(flags, "A");
1396
1397         CDEBUG(D_CONFIG, "Manual cleanup of %s (flags='%s')\n",
1398                obd->obd_name, flags);
1399
1400         lustre_cfg_bufs_reset(&bufs, obd->obd_name);
1401         lustre_cfg_bufs_set_string(&bufs, 1, flags);
1402         lcfg = lustre_cfg_new(LCFG_CLEANUP, &bufs);
1403         if (!lcfg)
1404                 RETURN(-ENOMEM);
1405
1406         rc = class_process_config(lcfg);
1407         if (rc) {
1408                 CERROR("cleanup failed %d: %s\n", rc, obd->obd_name);
1409                 GOTO(out, rc);
1410         }
1411
1412         /* the lcfg is almost the same for both ops */
1413         lcfg->lcfg_command = LCFG_DETACH;
1414         rc = class_process_config(lcfg);
1415         if (rc)
1416                 CERROR("detach failed %d: %s\n", rc, obd->obd_name);
1417 out:
1418         lustre_cfg_free(lcfg);
1419         RETURN(rc);
1420 }
1421
1422 /*
1423  * uuid<->export lustre hash operations
1424  */
1425
1426 static unsigned
1427 uuid_hash(cfs_hash_t *hs,  void *key, unsigned mask)
1428 {
1429         return cfs_hash_djb2_hash(((struct obd_uuid *)key)->uuid,
1430                                   sizeof(((struct obd_uuid *)key)->uuid), mask);
1431 }
1432
1433 static void *
1434 uuid_key(cfs_hlist_node_t *hnode)
1435 {
1436         struct obd_export *exp;
1437
1438         exp = cfs_hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1439
1440         RETURN(&exp->exp_client_uuid);
1441 }
1442
1443 /*
1444  * NOTE: It is impossible to find an export that is in failed
1445  *       state with this function
1446  */
1447 static int
1448 uuid_compare(void *key, cfs_hlist_node_t *hnode)
1449 {
1450         struct obd_export *exp;
1451
1452         LASSERT(key);
1453         exp = cfs_hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1454
1455         RETURN(obd_uuid_equals((struct obd_uuid *)key,&exp->exp_client_uuid) &&
1456                !exp->exp_failed);
1457 }
1458
1459 static void *
1460 uuid_export_get(cfs_hlist_node_t *hnode)
1461 {
1462         struct obd_export *exp;
1463
1464         exp = cfs_hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1465         class_export_get(exp);
1466
1467         RETURN(exp);
1468 }
1469
1470 static void *
1471 uuid_export_put(cfs_hlist_node_t *hnode)
1472 {
1473         struct obd_export *exp;
1474
1475         exp = cfs_hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1476         class_export_put(exp);
1477
1478         RETURN(exp);
1479 }
1480
1481 static cfs_hash_ops_t uuid_hash_ops = {
1482         .hs_hash    = uuid_hash,
1483         .hs_key     = uuid_key,
1484         .hs_compare = uuid_compare,
1485         .hs_get     = uuid_export_get,
1486         .hs_put     = uuid_export_put,
1487 };
1488
1489
1490 /*
1491  * nid<->export hash operations
1492  */
1493
1494 static unsigned
1495 nid_hash(cfs_hash_t *hs,  void *key, unsigned mask)
1496 {
1497         return cfs_hash_djb2_hash(key, sizeof(lnet_nid_t), mask);
1498 }
1499
1500 static void *
1501 nid_key(cfs_hlist_node_t *hnode)
1502 {
1503         struct obd_export *exp;
1504
1505         exp = cfs_hlist_entry(hnode, struct obd_export, exp_nid_hash);
1506
1507         RETURN(&exp->exp_connection->c_peer.nid);
1508 }
1509
1510 /*
1511  * NOTE: It is impossible to find an export that is in failed
1512  *       state with this function
1513  */
1514 static int
1515 nid_compare(void *key, cfs_hlist_node_t *hnode)
1516 {
1517         struct obd_export *exp;
1518
1519         LASSERT(key);
1520         exp = cfs_hlist_entry(hnode, struct obd_export, exp_nid_hash);
1521
1522         RETURN(exp->exp_connection->c_peer.nid == *(lnet_nid_t *)key &&
1523                !exp->exp_failed);
1524 }
1525
1526 static void *
1527 nid_export_get(cfs_hlist_node_t *hnode)
1528 {
1529         struct obd_export *exp;
1530
1531         exp = cfs_hlist_entry(hnode, struct obd_export, exp_nid_hash);
1532         class_export_get(exp);
1533
1534         RETURN(exp);
1535 }
1536
1537 static void *
1538 nid_export_put(cfs_hlist_node_t *hnode)
1539 {
1540         struct obd_export *exp;
1541
1542         exp = cfs_hlist_entry(hnode, struct obd_export, exp_nid_hash);
1543         class_export_put(exp);
1544
1545         RETURN(exp);
1546 }
1547
1548 static cfs_hash_ops_t nid_hash_ops = {
1549         .hs_hash    = nid_hash,
1550         .hs_key     = nid_key,
1551         .hs_compare = nid_compare,
1552         .hs_get     = nid_export_get,
1553         .hs_put     = nid_export_put,
1554 };
1555
1556
1557 /*
1558  * nid<->nidstats hash operations
1559  */
1560
1561 static void *
1562 nidstats_key(cfs_hlist_node_t *hnode)
1563 {
1564         struct nid_stat *ns;
1565
1566         ns = cfs_hlist_entry(hnode, struct nid_stat, nid_hash);
1567
1568         RETURN(&ns->nid);
1569 }
1570
1571 static int
1572 nidstats_compare(void *key, cfs_hlist_node_t *hnode)
1573 {
1574         RETURN(*(lnet_nid_t *)nidstats_key(hnode) == *(lnet_nid_t *)key);
1575 }
1576
1577 static void *
1578 nidstats_get(cfs_hlist_node_t *hnode)
1579 {
1580         struct nid_stat *ns;
1581
1582         ns = cfs_hlist_entry(hnode, struct nid_stat, nid_hash);
1583         nidstat_getref(ns);
1584
1585         RETURN(ns);
1586 }
1587
1588 static void *
1589 nidstats_put(cfs_hlist_node_t *hnode)
1590 {
1591         struct nid_stat *ns;
1592
1593         ns = cfs_hlist_entry(hnode, struct nid_stat, nid_hash);
1594         nidstat_putref(ns);
1595
1596         RETURN(ns);
1597 }
1598
1599 static cfs_hash_ops_t nid_stat_hash_ops = {
1600         .hs_hash    = nid_hash,
1601         .hs_key     = nidstats_key,
1602         .hs_compare = nidstats_compare,
1603         .hs_get     = nidstats_get,
1604         .hs_put     = nidstats_put,
1605 };