1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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.
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).
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
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
29 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/obdclass/obd_config.c
41 #define DEBUG_SUBSYSTEM S_CLASS
43 #include <obd_class.h>
44 #include <linux/string.h>
46 #include <liblustre.h>
47 #include <obd_class.h>
50 #include <lustre_log.h>
51 #include <lprocfs_status.h>
52 #include <libcfs/list.h>
53 #include <lustre_param.h>
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;
59 /*********** string parsing utils *********/
61 /* returns 0 if we find this key in the buffer, else 1 */
62 int class_find_param(char *buf, char *key, char **valp)
69 if ((ptr = strstr(buf, key)) == NULL)
73 *valp = ptr + strlen(key);
79 * Finds a parameter in \a params and copies it to \a copy.
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.
87 * On return \a params is set to next parameter or to NULL if last
88 * parameter is returned.
90 * \retval 0 if parameter is returned in \a copy
92 * \retval -EINVAL if unbalanced quota is found
94 int class_get_next_param(char **params, char *copy)
109 q1 = strpbrk(str, " '\"");
112 memcpy(copy, str, len);
119 memcpy(copy, str, len);
125 memcpy(copy, str, len);
128 /* search for the matching closing quote */
130 q2 = strchr(str, *q1);
132 CERROR("Unbalanced quota in parameters: \"%s\"\n",
137 memcpy(copy, str, len);
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)
151 if (memcmp(buf, key, strlen(key)) != 0)
155 *valp = buf + strlen(key);
160 static int parse_nid(char *buf, void *value)
162 lnet_nid_t *nid = (lnet_nid_t *)value;
164 *nid = libcfs_str2nid(buf);
165 if (*nid != LNET_NID_ANY)
168 LCONSOLE_ERROR_MSG(0x159, "Can't parse NID '%s'\n", buf);
172 static int parse_net(char *buf, void *value)
174 __u32 *net = (__u32 *)net;
176 *net = libcfs_str2net(buf);
177 CDEBUG(D_INFO, "Net %s\n", libcfs_net2str(*net));
189 endh is set to next separator */
190 static int class_parse_value(char *buf, int opc, void *value, char **endh)
198 while (*buf == ',' || *buf == ':')
200 if (*buf == ' ' || *buf == '/' || *buf == '\0')
203 /* nid separators or end of nids */
204 endp = strpbrk(buf, ",: /");
206 endp = buf + strlen(buf);
213 case CLASS_PARSE_NID:
214 rc = parse_nid(buf, value);
216 case CLASS_PARSE_NET:
217 rc = parse_net(buf, value);
228 int class_parse_nid(char *buf, lnet_nid_t *nid, char **endh)
230 return class_parse_value(buf, CLASS_PARSE_NID, (void *)nid, endh);
233 int class_parse_net(char *buf, __u32 *net, char **endh)
235 return class_parse_value(buf, CLASS_PARSE_NET, (void *)net, endh);
238 int class_match_net(char *buf, lnet_nid_t nid)
242 while (class_find_param(buf, PARAM_NETWORK, &buf) == 0) {
243 /* please restrict to the nids pertaining to
244 * the specified networks */
245 while (class_parse_net(buf, &net, &buf) == 0) {
246 if (LNET_NIDNET(nid) == net)
253 EXPORT_SYMBOL(class_find_param);
254 EXPORT_SYMBOL(class_get_next_param);
255 EXPORT_SYMBOL(class_match_param);
256 EXPORT_SYMBOL(class_parse_nid);
257 EXPORT_SYMBOL(class_parse_net);
258 EXPORT_SYMBOL(class_match_net);
260 /********************** class fns **********************/
263 * Create a new obd device and set the type, name and uuid. If successful,
264 * the new device can be accessed by either name or uuid.
266 int class_attach(struct lustre_cfg *lcfg)
268 struct obd_device *obd = NULL;
269 char *typename, *name, *uuid;
273 if (!LUSTRE_CFG_BUFLEN(lcfg, 1)) {
274 CERROR("No type passed!\n");
277 typename = lustre_cfg_string(lcfg, 1);
279 if (!LUSTRE_CFG_BUFLEN(lcfg, 0)) {
280 CERROR("No name passed!\n");
283 name = lustre_cfg_string(lcfg, 0);
285 if (!LUSTRE_CFG_BUFLEN(lcfg, 2)) {
286 CERROR("No UUID passed!\n");
289 uuid = lustre_cfg_string(lcfg, 2);
291 CDEBUG(D_IOCTL, "attach type %s name: %s uuid: %s\n",
292 MKSTR(typename), MKSTR(name), MKSTR(uuid));
294 obd = class_newdev(typename, name);
296 /* Already exists or out of obds */
299 CERROR("Cannot create device %s of type %s : %d\n",
303 LASSERTF(obd != NULL, "Cannot get obd device %s of type %s\n",
305 LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
306 "obd %p obd_magic %08X != %08X\n",
307 obd, obd->obd_magic, OBD_DEVICE_MAGIC);
308 LASSERTF(strncmp(obd->obd_name, name, strlen(name)) == 0,
309 "%p obd_name %s != %s\n", obd, obd->obd_name, name);
311 cfs_rwlock_init(&obd->obd_pool_lock);
312 obd->obd_pool_limit = 0;
313 obd->obd_pool_slv = 0;
315 CFS_INIT_LIST_HEAD(&obd->obd_exports);
316 CFS_INIT_LIST_HEAD(&obd->obd_unlinked_exports);
317 CFS_INIT_LIST_HEAD(&obd->obd_delayed_exports);
318 CFS_INIT_LIST_HEAD(&obd->obd_exports_timed);
319 CFS_INIT_LIST_HEAD(&obd->obd_nid_stats);
320 cfs_spin_lock_init(&obd->obd_nid_lock);
321 cfs_spin_lock_init(&obd->obd_dev_lock);
322 cfs_sema_init(&obd->obd_dev_sem, 1);
323 cfs_spin_lock_init(&obd->obd_osfs_lock);
324 /* obd->obd_osfs_age must be set to a value in the distant
325 * past to guarantee a fresh statfs is fetched on mount. */
326 obd->obd_osfs_age = cfs_time_shift_64(-1000);
328 /* XXX belongs in setup not attach */
329 cfs_init_rwsem(&obd->obd_observer_link_sem);
331 cfs_init_timer(&obd->obd_recovery_timer);
332 cfs_spin_lock_init(&obd->obd_processing_task_lock);
333 cfs_waitq_init(&obd->obd_next_transno_waitq);
334 cfs_waitq_init(&obd->obd_evict_inprogress_waitq);
335 CFS_INIT_LIST_HEAD(&obd->obd_req_replay_queue);
336 CFS_INIT_LIST_HEAD(&obd->obd_lock_replay_queue);
337 CFS_INIT_LIST_HEAD(&obd->obd_final_req_queue);
338 CFS_INIT_LIST_HEAD(&obd->obd_evict_list);
340 llog_group_init(&obd->obd_olg, FID_SEQ_LLOG);
343 if (len >= sizeof(obd->obd_uuid)) {
344 CERROR("uuid must be < %d bytes long\n",
345 (int)sizeof(obd->obd_uuid));
346 GOTO(out, rc = -EINVAL);
348 memcpy(obd->obd_uuid.uuid, uuid, len);
351 if (OBP(obd, attach)) {
352 rc = OBP(obd,attach)(obd, sizeof *lcfg, lcfg);
354 GOTO(out, rc = -EINVAL);
357 /* Detach drops this */
358 cfs_spin_lock(&obd->obd_dev_lock);
359 cfs_atomic_set(&obd->obd_refcount, 1);
360 cfs_spin_unlock(&obd->obd_dev_lock);
361 lu_ref_init(&obd->obd_reference);
362 lu_ref_add(&obd->obd_reference, "attach", obd);
364 obd->obd_attached = 1;
365 CDEBUG(D_IOCTL, "OBD: dev %d attached type %s with refcount %d\n",
366 obd->obd_minor, typename, cfs_atomic_read(&obd->obd_refcount));
370 class_release_dev(obd);
375 /** Create hashes, self-export, and call type-specific setup.
376 * Setup is effectively the "start this obd" call.
378 int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
381 struct obd_export *exp;
384 LASSERT(obd != NULL);
385 LASSERTF(obd == class_num2obd(obd->obd_minor),
386 "obd %p != obd_devs[%d] %p\n",
387 obd, obd->obd_minor, class_num2obd(obd->obd_minor));
388 LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
389 "obd %p obd_magic %08x != %08x\n",
390 obd, obd->obd_magic, OBD_DEVICE_MAGIC);
392 /* have we attached a type to this device? */
393 if (!obd->obd_attached) {
394 CERROR("Device %d not attached\n", obd->obd_minor);
398 if (obd->obd_set_up) {
399 CERROR("Device %d already setup (type %s)\n",
400 obd->obd_minor, obd->obd_type->typ_name);
404 /* is someone else setting us up right now? (attach inits spinlock) */
405 cfs_spin_lock(&obd->obd_dev_lock);
406 if (obd->obd_starting) {
407 cfs_spin_unlock(&obd->obd_dev_lock);
408 CERROR("Device %d setup in progress (type %s)\n",
409 obd->obd_minor, obd->obd_type->typ_name);
412 /* just leave this on forever. I can't use obd_set_up here because
413 other fns check that status, and we're not actually set up yet. */
414 obd->obd_starting = 1;
415 obd->obd_uuid_hash = NULL;
416 obd->obd_nid_hash = NULL;
417 obd->obd_nid_stats_hash = NULL;
418 cfs_spin_unlock(&obd->obd_dev_lock);
420 /* create an uuid-export lustre hash */
421 obd->obd_uuid_hash = cfs_hash_create("UUID_HASH",
424 &uuid_hash_ops, CFS_HASH_REHASH);
425 if (!obd->obd_uuid_hash)
426 GOTO(err_hash, err = -ENOMEM);
428 /* create a nid-export lustre hash */
429 obd->obd_nid_hash = cfs_hash_create("NID_HASH",
432 &nid_hash_ops, CFS_HASH_REHASH);
433 if (!obd->obd_nid_hash)
434 GOTO(err_hash, err = -ENOMEM);
436 /* create a nid-stats lustre hash */
437 obd->obd_nid_stats_hash = cfs_hash_create("NID_STATS",
438 HASH_NID_STATS_CUR_BITS,
439 HASH_NID_STATS_MAX_BITS,
440 &nid_stat_hash_ops, CFS_HASH_REHASH);
441 if (!obd->obd_nid_stats_hash)
442 GOTO(err_hash, err = -ENOMEM);
444 exp = class_new_export(obd, &obd->obd_uuid);
446 GOTO(err_hash, err = PTR_ERR(exp));
448 obd->obd_self_export = exp;
449 cfs_list_del_init(&exp->exp_obd_chain_timed);
450 class_export_put(exp);
452 err = obd_setup(obd, lcfg);
458 cfs_spin_lock(&obd->obd_dev_lock);
459 /* cleanup drops this */
460 class_incref(obd, "setup", obd);
461 cfs_spin_unlock(&obd->obd_dev_lock);
463 CDEBUG(D_IOCTL, "finished setup of obd %s (uuid %s)\n",
464 obd->obd_name, obd->obd_uuid.uuid);
468 if (obd->obd_self_export) {
469 class_unlink_export(obd->obd_self_export);
470 obd->obd_self_export = NULL;
473 if (obd->obd_uuid_hash) {
474 cfs_hash_putref(obd->obd_uuid_hash);
475 obd->obd_uuid_hash = NULL;
477 if (obd->obd_nid_hash) {
478 cfs_hash_putref(obd->obd_nid_hash);
479 obd->obd_nid_hash = NULL;
481 if (obd->obd_nid_stats_hash) {
482 cfs_hash_putref(obd->obd_nid_stats_hash);
483 obd->obd_nid_stats_hash = NULL;
485 obd->obd_starting = 0;
486 CERROR("setup %s failed (%d)\n", obd->obd_name, err);
490 /** We have finished using this obd and are ready to destroy it.
491 * There can be no more references to this obd.
493 int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg)
497 if (obd->obd_set_up) {
498 CERROR("OBD device %d still set up\n", obd->obd_minor);
502 cfs_spin_lock(&obd->obd_dev_lock);
503 if (!obd->obd_attached) {
504 cfs_spin_unlock(&obd->obd_dev_lock);
505 CERROR("OBD device %d not attached\n", obd->obd_minor);
508 obd->obd_attached = 0;
509 cfs_spin_unlock(&obd->obd_dev_lock);
511 CDEBUG(D_IOCTL, "detach on obd %s (uuid %s)\n",
512 obd->obd_name, obd->obd_uuid.uuid);
514 class_decref(obd, "attach", obd);
516 /* not strictly necessary, but cleans up eagerly */
517 obd_zombie_impexp_cull();
522 /** Start shutting down the obd. There may be in-progess ops when
523 * this is called. We tell them to start shutting down with a call
524 * to class_disconnect_exports().
526 int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg)
532 OBD_RACE(OBD_FAIL_LDLM_RECOV_CLIENTS);
534 if (!obd->obd_set_up) {
535 CERROR("Device %d not setup\n", obd->obd_minor);
539 cfs_spin_lock(&obd->obd_dev_lock);
540 if (obd->obd_stopping) {
541 cfs_spin_unlock(&obd->obd_dev_lock);
542 CERROR("OBD %d already stopping\n", obd->obd_minor);
545 /* Leave this on forever */
546 obd->obd_stopping = 1;
547 cfs_spin_unlock(&obd->obd_dev_lock);
549 if (lcfg->lcfg_bufcount >= 2 && LUSTRE_CFG_BUFLEN(lcfg, 1) > 0) {
550 for (flag = lustre_cfg_string(lcfg, 1); *flag != 0; flag++)
556 LCONSOLE_WARN("Failing over %s\n",
559 obd->obd_no_transno = 1;
560 obd->obd_no_recov = 1;
561 if (OBP(obd, iocontrol)) {
562 obd_iocontrol(OBD_IOC_SYNC,
563 obd->obd_self_export,
568 CERROR("Unrecognised flag '%c'\n", *flag);
572 LASSERT(obd->obd_self_export);
574 /* The three references that should be remaining are the
575 * obd_self_export and the attach and setup references. */
576 if (cfs_atomic_read(&obd->obd_refcount) > 3) {
577 /* refcounf - 3 might be the number of real exports
578 (excluding self export). But class_incref is called
579 by other things as well, so don't count on it. */
580 CDEBUG(D_IOCTL, "%s: forcing exports to disconnect: %d\n",
581 obd->obd_name, cfs_atomic_read(&obd->obd_refcount) - 3);
582 dump_exports(obd, 0);
583 class_disconnect_exports(obd);
586 /* destroy an uuid-export hash body */
587 if (obd->obd_uuid_hash) {
588 cfs_hash_putref(obd->obd_uuid_hash);
589 obd->obd_uuid_hash = NULL;
592 /* destroy a nid-export hash body */
593 if (obd->obd_nid_hash) {
594 cfs_hash_putref(obd->obd_nid_hash);
595 obd->obd_nid_hash = NULL;
598 /* destroy a nid-stats hash body */
599 if (obd->obd_nid_stats_hash) {
600 cfs_hash_putref(obd->obd_nid_stats_hash);
601 obd->obd_nid_stats_hash = NULL;
604 /* Precleanup, we must make sure all exports get destroyed. */
605 err = obd_precleanup(obd, OBD_CLEANUP_EXPORTS);
607 CERROR("Precleanup %s returned %d\n",
609 class_decref(obd, "setup", obd);
614 struct obd_device *class_incref(struct obd_device *obd,
615 const char *scope, const void *source)
617 lu_ref_add_atomic(&obd->obd_reference, scope, source);
618 cfs_atomic_inc(&obd->obd_refcount);
619 CDEBUG(D_INFO, "incref %s (%p) now %d\n", obd->obd_name, obd,
620 cfs_atomic_read(&obd->obd_refcount));
625 void class_decref(struct obd_device *obd, const char *scope, const void *source)
630 cfs_spin_lock(&obd->obd_dev_lock);
631 cfs_atomic_dec(&obd->obd_refcount);
632 refs = cfs_atomic_read(&obd->obd_refcount);
633 cfs_spin_unlock(&obd->obd_dev_lock);
634 lu_ref_del(&obd->obd_reference, scope, source);
636 CDEBUG(D_INFO, "Decref %s (%p) now %d\n", obd->obd_name, obd, refs);
638 if ((refs == 1) && obd->obd_stopping) {
639 /* All exports have been destroyed; there should
640 be no more in-progress ops by this point.*/
642 cfs_spin_lock(&obd->obd_self_export->exp_lock);
643 obd->obd_self_export->exp_flags |= exp_flags_from_obd(obd);
644 cfs_spin_unlock(&obd->obd_self_export->exp_lock);
646 /* note that we'll recurse into class_decref again */
647 class_unlink_export(obd->obd_self_export);
652 CDEBUG(D_CONFIG, "finishing cleanup of obd %s (%s)\n",
653 obd->obd_name, obd->obd_uuid.uuid);
654 LASSERT(!obd->obd_attached);
655 if (obd->obd_stopping) {
656 /* If we're not stopping, we were never set up */
657 err = obd_cleanup(obd);
659 CERROR("Cleanup %s returned %d\n",
662 if (OBP(obd, detach)) {
663 err = OBP(obd, detach)(obd);
665 CERROR("Detach returned %d\n", err);
667 class_release_dev(obd);
671 /** Add a failover nid location.
672 * Client obd types contact server obd types using this nid list.
674 int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
676 struct obd_import *imp;
677 struct obd_uuid uuid;
681 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
682 LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
683 CERROR("invalid conn_uuid\n");
686 if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
687 strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) &&
688 strcmp(obd->obd_type->typ_name, LUSTRE_MGC_NAME)) {
689 CERROR("can't add connection on non-client dev\n");
693 imp = obd->u.cli.cl_import;
695 CERROR("try to add conn on immature client dev\n");
699 obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
700 rc = obd_add_conn(imp, &uuid, lcfg->lcfg_num);
705 /** Remove a failover nid location.
707 int class_del_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
709 struct obd_import *imp;
710 struct obd_uuid uuid;
714 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
715 LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
716 CERROR("invalid conn_uuid\n");
719 if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
720 strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME)) {
721 CERROR("can't del connection on non-client dev\n");
725 imp = obd->u.cli.cl_import;
727 CERROR("try to del conn on immature client dev\n");
731 obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
732 rc = obd_del_conn(imp, &uuid);
737 CFS_LIST_HEAD(lustre_profile_list);
739 struct lustre_profile *class_get_profile(const char * prof)
741 struct lustre_profile *lprof;
744 cfs_list_for_each_entry(lprof, &lustre_profile_list, lp_list) {
745 if (!strcmp(lprof->lp_profile, prof)) {
752 /** Create a named "profile".
753 * This defines the mdc and osc names to use for a client.
754 * This also is used to define the lov to be used by a mdt.
756 int class_add_profile(int proflen, char *prof, int osclen, char *osc,
757 int mdclen, char *mdc)
759 struct lustre_profile *lprof;
763 CDEBUG(D_CONFIG, "Add profile %s\n", prof);
765 OBD_ALLOC(lprof, sizeof(*lprof));
768 CFS_INIT_LIST_HEAD(&lprof->lp_list);
770 LASSERT(proflen == (strlen(prof) + 1));
771 OBD_ALLOC(lprof->lp_profile, proflen);
772 if (lprof->lp_profile == NULL)
773 GOTO(out, err = -ENOMEM);
774 memcpy(lprof->lp_profile, prof, proflen);
776 LASSERT(osclen == (strlen(osc) + 1));
777 OBD_ALLOC(lprof->lp_dt, osclen);
778 if (lprof->lp_dt == NULL)
779 GOTO(out, err = -ENOMEM);
780 memcpy(lprof->lp_dt, osc, osclen);
783 LASSERT(mdclen == (strlen(mdc) + 1));
784 OBD_ALLOC(lprof->lp_md, mdclen);
785 if (lprof->lp_md == NULL)
786 GOTO(out, err = -ENOMEM);
787 memcpy(lprof->lp_md, mdc, mdclen);
790 cfs_list_add(&lprof->lp_list, &lustre_profile_list);
795 OBD_FREE(lprof->lp_md, mdclen);
797 OBD_FREE(lprof->lp_dt, osclen);
798 if (lprof->lp_profile)
799 OBD_FREE(lprof->lp_profile, proflen);
800 OBD_FREE(lprof, sizeof(*lprof));
804 void class_del_profile(const char *prof)
806 struct lustre_profile *lprof;
809 CDEBUG(D_CONFIG, "Del profile %s\n", prof);
811 lprof = class_get_profile(prof);
813 cfs_list_del(&lprof->lp_list);
814 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
815 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
817 OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
818 OBD_FREE(lprof, sizeof *lprof);
824 void class_del_profiles(void)
826 struct lustre_profile *lprof, *n;
829 cfs_list_for_each_entry_safe(lprof, n, &lustre_profile_list, lp_list) {
830 cfs_list_del(&lprof->lp_list);
831 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
832 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
834 OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
835 OBD_FREE(lprof, sizeof *lprof);
840 static int class_set_global(char *ptr, int val) {
843 if (class_match_param(ptr, PARAM_AT_MIN, NULL) == 0)
845 else if (class_match_param(ptr, PARAM_AT_MAX, NULL) == 0)
847 else if (class_match_param(ptr, PARAM_AT_EXTRA, NULL) == 0)
849 else if (class_match_param(ptr, PARAM_AT_EARLY_MARGIN, NULL) == 0)
850 at_early_margin = val;
851 else if (class_match_param(ptr, PARAM_AT_HISTORY, NULL) == 0)
856 CDEBUG(D_IOCTL, "global %s = %d\n", ptr, val);
862 /* We can't call ll_process_config directly because it lives in a module that
863 must be loaded after this one. */
864 static int (*client_process_config)(struct lustre_cfg *lcfg) = NULL;
866 void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg))
868 client_process_config = cpc;
870 EXPORT_SYMBOL(lustre_register_client_process_config);
872 /** Process configuration commands given in lustre_cfg form.
873 * These may come from direct calls (e.g. class_manual_cleanup)
874 * or processing the config llog, or ioctl from lctl.
876 int class_process_config(struct lustre_cfg *lcfg)
878 struct obd_device *obd;
881 LASSERT(lcfg && !IS_ERR(lcfg));
882 CDEBUG(D_IOCTL, "processing cmd: %x\n", lcfg->lcfg_command);
884 /* Commands that don't need a device */
885 switch(lcfg->lcfg_command) {
887 err = class_attach(lcfg);
890 case LCFG_ADD_UUID: {
891 CDEBUG(D_IOCTL, "adding mapping from uuid %s to nid "LPX64
892 " (%s)\n", lustre_cfg_string(lcfg, 1),
893 lcfg->lcfg_nid, libcfs_nid2str(lcfg->lcfg_nid));
895 err = class_add_uuid(lustre_cfg_string(lcfg, 1), lcfg->lcfg_nid);
898 case LCFG_DEL_UUID: {
899 CDEBUG(D_IOCTL, "removing mappings for uuid %s\n",
900 (lcfg->lcfg_bufcount < 2 || LUSTRE_CFG_BUFLEN(lcfg, 1) == 0)
901 ? "<all uuids>" : lustre_cfg_string(lcfg, 1));
903 err = class_del_uuid(lustre_cfg_string(lcfg, 1));
906 case LCFG_MOUNTOPT: {
907 CDEBUG(D_IOCTL, "mountopt: profile %s osc %s mdc %s\n",
908 lustre_cfg_string(lcfg, 1),
909 lustre_cfg_string(lcfg, 2),
910 lustre_cfg_string(lcfg, 3));
911 /* set these mount options somewhere, so ll_fill_super
913 err = class_add_profile(LUSTRE_CFG_BUFLEN(lcfg, 1),
914 lustre_cfg_string(lcfg, 1),
915 LUSTRE_CFG_BUFLEN(lcfg, 2),
916 lustre_cfg_string(lcfg, 2),
917 LUSTRE_CFG_BUFLEN(lcfg, 3),
918 lustre_cfg_string(lcfg, 3));
921 case LCFG_DEL_MOUNTOPT: {
922 CDEBUG(D_IOCTL, "mountopt: profile %s\n",
923 lustre_cfg_string(lcfg, 1));
924 class_del_profile(lustre_cfg_string(lcfg, 1));
927 case LCFG_SET_TIMEOUT: {
928 CDEBUG(D_IOCTL, "changing lustre timeout from %d to %d\n",
929 obd_timeout, lcfg->lcfg_num);
930 obd_timeout = max(lcfg->lcfg_num, 1U);
933 case LCFG_SET_LDLM_TIMEOUT: {
934 CDEBUG(D_IOCTL, "changing lustre ldlm_timeout from %d to %d\n",
935 ldlm_timeout, lcfg->lcfg_num);
936 ldlm_timeout = max(lcfg->lcfg_num, 1U);
937 if (ldlm_timeout >= obd_timeout)
938 ldlm_timeout = max(obd_timeout / 3, 1U);
942 case LCFG_SET_UPCALL: {
943 LCONSOLE_ERROR_MSG(0x15a, "recovery upcall is deprecated\n");
944 /* COMPAT_146 Don't fail on old configs */
948 struct cfg_marker *marker;
949 marker = lustre_cfg_buf(lcfg, 1);
950 CDEBUG(D_IOCTL, "marker %d (%#x) %.16s %s\n", marker->cm_step,
951 marker->cm_flags, marker->cm_tgtname, marker->cm_comment);
956 /* llite has no obd */
957 if ((class_match_param(lustre_cfg_string(lcfg, 1),
958 PARAM_LLITE, 0) == 0) &&
959 client_process_config) {
960 err = (*client_process_config)(lcfg);
962 } else if ((class_match_param(lustre_cfg_string(lcfg, 1),
963 PARAM_SYS, &tmp) == 0)) {
964 /* Global param settings */
965 err = class_set_global(tmp, lcfg->lcfg_num);
966 /* Note that since LCFG_PARAM is LCFG_REQUIRED, new
967 unknown globals would cause config to fail */
969 CWARN("Ignoring unknown param %s\n", tmp);
978 /* Commands that require a device */
979 obd = class_name2obd(lustre_cfg_string(lcfg, 0));
981 if (!LUSTRE_CFG_BUFLEN(lcfg, 0))
982 CERROR("this lcfg command requires a device name\n");
984 CERROR("no device for: %s\n",
985 lustre_cfg_string(lcfg, 0));
987 GOTO(out, err = -EINVAL);
990 switch(lcfg->lcfg_command) {
992 err = class_setup(obd, lcfg);
996 err = class_detach(obd, lcfg);
1000 err = class_cleanup(obd, lcfg);
1003 case LCFG_ADD_CONN: {
1004 err = class_add_conn(obd, lcfg);
1007 case LCFG_DEL_CONN: {
1008 err = class_del_conn(obd, lcfg);
1011 case LCFG_POOL_NEW: {
1012 err = obd_pool_new(obd, lustre_cfg_string(lcfg, 2));
1016 case LCFG_POOL_ADD: {
1017 err = obd_pool_add(obd, lustre_cfg_string(lcfg, 2),
1018 lustre_cfg_string(lcfg, 3));
1022 case LCFG_POOL_REM: {
1023 err = obd_pool_rem(obd, lustre_cfg_string(lcfg, 2),
1024 lustre_cfg_string(lcfg, 3));
1028 case LCFG_POOL_DEL: {
1029 err = obd_pool_del(obd, lustre_cfg_string(lcfg, 2));
1034 err = obd_process_config(obd, sizeof(*lcfg), lcfg);
1040 if ((err < 0) && !(lcfg->lcfg_command & LCFG_REQUIRED)) {
1041 CWARN("Ignoring error %d on optional command %#x\n", err,
1042 lcfg->lcfg_command);
1048 int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
1049 struct lustre_cfg *lcfg, void *data)
1052 struct lprocfs_vars *var;
1054 int i, keylen, vallen;
1055 int matched = 0, j = 0;
1060 if (lcfg->lcfg_command != LCFG_PARAM) {
1061 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1065 /* e.g. tunefs.lustre --param mdt.group_upcall=foo /r/tmp/lustre-mdt
1066 or lctl conf_param lustre-MDT0000.mdt.group_upcall=bar
1067 or lctl conf_param lustre-OST0000.osc.max_dirty_mb=36 */
1068 for (i = 1; i < lcfg->lcfg_bufcount; i++) {
1069 key = lustre_cfg_buf(lcfg, i);
1070 /* Strip off prefix */
1071 class_match_param(key, prefix, &key);
1072 sval = strchr(key, '=');
1073 if (!sval || (*(sval + 1) == 0)) {
1074 CERROR("Can't parse param %s (missing '=')\n", key);
1075 /* rc = -EINVAL; continue parsing other params */
1078 keylen = sval - key;
1080 vallen = strlen(sval);
1083 /* Search proc entries */
1084 while (lvars[j].name) {
1086 if (class_match_param(key, (char *)var->name, 0) == 0 &&
1087 keylen == strlen(var->name)) {
1090 if (var->write_fptr) {
1094 rc = (var->write_fptr)(NULL, sval,
1103 /* If the prefix doesn't match, return error so we
1104 can pass it down the stack */
1105 if (strnchr(key, keylen, '.'))
1107 CERROR("%s: unknown param %s\n",
1108 (char *)lustre_cfg_string(lcfg, 0), key);
1109 /* rc = -EINVAL; continue parsing other params */
1111 } else if (rc < 0) {
1112 CERROR("writing proc entry %s err %d\n",
1116 LCONSOLE_INFO("%s.%.*s: set parameter %.*s=%s\n",
1117 lustre_cfg_string(lcfg, 0),
1118 (int)strlen(prefix) - 1, prefix,
1119 (int)(sval - key - 1), key, sval);
1129 CDEBUG(D_CONFIG, "liblustre can't process params.\n");
1130 /* Don't throw config error */
1135 int class_config_dump_handler(struct llog_handle * handle,
1136 struct llog_rec_hdr *rec, void *data);
1139 extern int lustre_check_exclusion(struct super_block *sb, char *svname);
1141 #define lustre_check_exclusion(a,b) 0
1144 /** Parse a configuration llog, doing various manipulations on them
1145 * for various reasons, (modifications for compatibility, skip obsolete
1146 * records, change uuids, etc), then class_process_config() resulting
1149 static int class_config_llog_handler(struct llog_handle * handle,
1150 struct llog_rec_hdr *rec, void *data)
1152 struct config_llog_instance *clli = data;
1153 int cfg_len = rec->lrh_len;
1154 char *cfg_buf = (char*) (rec + 1);
1158 //class_config_dump_handler(handle, rec, data);
1160 switch (rec->lrh_type) {
1162 struct lustre_cfg *lcfg, *lcfg_new;
1163 struct lustre_cfg_bufs bufs;
1164 char *inst_name = NULL;
1166 int inst = 0, swab = 0;
1168 lcfg = (struct lustre_cfg *)cfg_buf;
1169 if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION)) {
1170 lustre_swab_lustre_cfg(lcfg);
1174 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1178 /* Figure out config state info */
1179 if (lcfg->lcfg_command == LCFG_MARKER) {
1180 struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1181 lustre_swab_cfg_marker(marker, swab,
1182 LUSTRE_CFG_BUFLEN(lcfg, 1));
1183 CDEBUG(D_CONFIG, "Marker, inst_flg=%#x mark_flg=%#x\n",
1184 clli->cfg_flags, marker->cm_flags);
1185 if (marker->cm_flags & CM_START) {
1186 /* all previous flags off */
1187 clli->cfg_flags = CFG_F_MARKER;
1188 if (marker->cm_flags & CM_SKIP) {
1189 clli->cfg_flags |= CFG_F_SKIP;
1190 CDEBUG(D_CONFIG, "SKIP #%d\n",
1192 } else if ((marker->cm_flags & CM_EXCLUDE) ||
1194 lustre_check_exclusion(clli->cfg_sb,
1195 marker->cm_tgtname))) {
1196 clli->cfg_flags |= CFG_F_EXCLUDE;
1197 CDEBUG(D_CONFIG, "EXCLUDE %d\n",
1200 } else if (marker->cm_flags & CM_END) {
1201 clli->cfg_flags = 0;
1204 /* A config command without a start marker before it is
1205 illegal (post 146) */
1206 if (!(clli->cfg_flags & CFG_F_COMPAT146) &&
1207 !(clli->cfg_flags & CFG_F_MARKER) &&
1208 (lcfg->lcfg_command != LCFG_MARKER)) {
1209 CWARN("Config not inside markers, ignoring! "
1210 "(inst: %s, uuid: %s, flags: %#x)\n",
1211 clli->cfg_instance ? clli->cfg_instance : "<null>",
1212 clli->cfg_uuid.uuid, clli->cfg_flags);
1213 clli->cfg_flags |= CFG_F_SKIP;
1215 if (clli->cfg_flags & CFG_F_SKIP) {
1216 CDEBUG(D_CONFIG, "skipping %#x\n",
1219 /* No processing! */
1224 * For interoperability between 1.8 and 2.0,
1225 * rename "mds" obd device type to "mdt".
1228 char *typename = lustre_cfg_string(lcfg, 1);
1229 char *index = lustre_cfg_string(lcfg, 2);
1231 if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
1232 strcmp(typename, "mds") == 0)) {
1233 CWARN("For 1.8 interoperability, rename obd "
1234 "type from mds to mdt\n");
1237 if ((lcfg->lcfg_command == LCFG_SETUP && index &&
1238 strcmp(index, "type") == 0)) {
1239 CDEBUG(D_INFO, "For 1.8 interoperability, "
1240 "set this index to '0'\n");
1246 if ((clli->cfg_flags & CFG_F_EXCLUDE) &&
1247 (lcfg->lcfg_command == LCFG_LOV_ADD_OBD))
1248 /* Add inactive instead */
1249 lcfg->lcfg_command = LCFG_LOV_ADD_INA;
1251 lustre_cfg_bufs_init(&bufs, lcfg);
1253 if (clli && clli->cfg_instance &&
1254 LUSTRE_CFG_BUFLEN(lcfg, 0) > 0){
1256 inst_len = LUSTRE_CFG_BUFLEN(lcfg, 0) +
1257 strlen(clli->cfg_instance) + 1;
1258 OBD_ALLOC(inst_name, inst_len);
1259 if (inst_name == NULL)
1260 GOTO(out, rc = -ENOMEM);
1261 sprintf(inst_name, "%s-%s",
1262 lustre_cfg_string(lcfg, 0),
1263 clli->cfg_instance);
1264 lustre_cfg_bufs_set_string(&bufs, 0, inst_name);
1265 CDEBUG(D_CONFIG, "cmd %x, instance name: %s\n",
1266 lcfg->lcfg_command, inst_name);
1269 /* we override the llog's uuid for clients, to insure they
1271 if (clli && clli->cfg_instance &&
1272 lcfg->lcfg_command == LCFG_ATTACH) {
1273 lustre_cfg_bufs_set_string(&bufs, 2,
1274 clli->cfg_uuid.uuid);
1277 * sptlrpc config record, we expect 2 data segments:
1278 * [0]: fs_name/target_name,
1280 * moving them to index [1] and [2], and insert MGC's
1281 * obdname at index [0].
1283 if (clli && clli->cfg_instance == NULL &&
1284 lcfg->lcfg_command == LCFG_SPTLRPC_CONF) {
1285 lustre_cfg_bufs_set(&bufs, 2, bufs.lcfg_buf[1],
1286 bufs.lcfg_buflen[1]);
1287 lustre_cfg_bufs_set(&bufs, 1, bufs.lcfg_buf[0],
1288 bufs.lcfg_buflen[0]);
1289 lustre_cfg_bufs_set_string(&bufs, 0,
1293 lcfg_new = lustre_cfg_new(lcfg->lcfg_command, &bufs);
1295 lcfg_new->lcfg_num = lcfg->lcfg_num;
1296 lcfg_new->lcfg_flags = lcfg->lcfg_flags;
1298 /* XXX Hack to try to remain binary compatible with
1299 * pre-newconfig logs */
1300 if (lcfg->lcfg_nal != 0 && /* pre-newconfig log? */
1301 (lcfg->lcfg_nid >> 32) == 0) {
1302 __u32 addr = (__u32)(lcfg->lcfg_nid & 0xffffffff);
1304 lcfg_new->lcfg_nid =
1305 LNET_MKNID(LNET_MKNET(lcfg->lcfg_nal, 0), addr);
1306 CWARN("Converted pre-newconfig NAL %d NID %x to %s\n",
1307 lcfg->lcfg_nal, addr,
1308 libcfs_nid2str(lcfg_new->lcfg_nid));
1310 lcfg_new->lcfg_nid = lcfg->lcfg_nid;
1313 lcfg_new->lcfg_nal = 0; /* illegal value for obsolete field */
1315 rc = class_process_config(lcfg_new);
1316 lustre_cfg_free(lcfg_new);
1319 OBD_FREE(inst_name, inst_len);
1323 CERROR("Unknown llog record type %#x encountered\n",
1329 CERROR("Err %d on cfg command:\n", rc);
1330 class_config_dump_handler(handle, rec, data);
1335 int class_config_parse_llog(struct llog_ctxt *ctxt, char *name,
1336 struct config_llog_instance *cfg)
1338 struct llog_process_cat_data cd = {0, 0};
1339 struct llog_handle *llh;
1343 CDEBUG(D_INFO, "looking up llog %s\n", name);
1344 rc = llog_create(ctxt, &llh, NULL, name);
1348 rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
1350 GOTO(parse_out, rc);
1352 /* continue processing from where we last stopped to end-of-log */
1354 cd.lpcd_first_idx = cfg->cfg_last_idx;
1355 cd.lpcd_last_idx = 0;
1357 rc = llog_process(llh, class_config_llog_handler, cfg, &cd);
1359 CDEBUG(D_CONFIG, "Processed log %s gen %d-%d (rc=%d)\n", name,
1360 cd.lpcd_first_idx + 1, cd.lpcd_last_idx, rc);
1363 cfg->cfg_last_idx = cd.lpcd_last_idx;
1366 rc2 = llog_close(llh);
1373 int class_config_dump_handler(struct llog_handle * handle,
1374 struct llog_rec_hdr *rec, void *data)
1376 int cfg_len = rec->lrh_len;
1377 char *cfg_buf = (char*) (rec + 1);
1378 char *outstr, *ptr, *end;
1382 OBD_ALLOC(outstr, 256);
1388 if (rec->lrh_type == OBD_CFG_REC) {
1389 struct lustre_cfg *lcfg;
1392 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1395 lcfg = (struct lustre_cfg *)cfg_buf;
1397 ptr += snprintf(ptr, end-ptr, "cmd=%05x ",
1398 lcfg->lcfg_command);
1399 if (lcfg->lcfg_flags) {
1400 ptr += snprintf(ptr, end-ptr, "flags=%#08x ",
1403 if (lcfg->lcfg_num) {
1404 ptr += snprintf(ptr, end-ptr, "num=%#08x ",
1407 if (lcfg->lcfg_nid) {
1408 ptr += snprintf(ptr, end-ptr, "nid=%s("LPX64")\n ",
1409 libcfs_nid2str(lcfg->lcfg_nid),
1412 if (lcfg->lcfg_command == LCFG_MARKER) {
1413 struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1414 ptr += snprintf(ptr, end-ptr, "marker=%d(%#x)%s '%s'",
1415 marker->cm_step, marker->cm_flags,
1416 marker->cm_tgtname, marker->cm_comment);
1418 for (i = 0; i < lcfg->lcfg_bufcount; i++) {
1419 ptr += snprintf(ptr, end-ptr, "%d:%s ", i,
1420 lustre_cfg_string(lcfg, i));
1423 LCONSOLE(D_WARNING, " %s\n", outstr);
1425 LCONSOLE(D_WARNING, "unhandled lrh_type: %#x\n", rec->lrh_type);
1429 OBD_FREE(outstr, 256);
1433 int class_config_dump_llog(struct llog_ctxt *ctxt, char *name,
1434 struct config_llog_instance *cfg)
1436 struct llog_handle *llh;
1440 LCONSOLE_INFO("Dumping config log %s\n", name);
1442 rc = llog_create(ctxt, &llh, NULL, name);
1446 rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
1448 GOTO(parse_out, rc);
1450 rc = llog_process(llh, class_config_dump_handler, cfg, NULL);
1452 rc2 = llog_close(llh);
1456 LCONSOLE_INFO("End config log %s\n", name);
1461 /** Call class_cleanup and class_detach.
1462 * "Manual" only in the sense that we're faking lcfg commands.
1464 int class_manual_cleanup(struct obd_device *obd)
1467 struct lustre_cfg *lcfg;
1468 struct lustre_cfg_bufs bufs;
1473 CERROR("empty cleanup\n");
1482 CDEBUG(D_CONFIG, "Manual cleanup of %s (flags='%s')\n",
1483 obd->obd_name, flags);
1485 lustre_cfg_bufs_reset(&bufs, obd->obd_name);
1486 lustre_cfg_bufs_set_string(&bufs, 1, flags);
1487 lcfg = lustre_cfg_new(LCFG_CLEANUP, &bufs);
1491 rc = class_process_config(lcfg);
1493 CERROR("cleanup failed %d: %s\n", rc, obd->obd_name);
1497 /* the lcfg is almost the same for both ops */
1498 lcfg->lcfg_command = LCFG_DETACH;
1499 rc = class_process_config(lcfg);
1501 CERROR("detach failed %d: %s\n", rc, obd->obd_name);
1503 lustre_cfg_free(lcfg);
1508 * uuid<->export lustre hash operations
1512 uuid_hash(cfs_hash_t *hs, void *key, unsigned mask)
1514 return cfs_hash_djb2_hash(((struct obd_uuid *)key)->uuid,
1515 sizeof(((struct obd_uuid *)key)->uuid), mask);
1519 uuid_key(cfs_hlist_node_t *hnode)
1521 struct obd_export *exp;
1523 exp = cfs_hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1525 RETURN(&exp->exp_client_uuid);
1529 * NOTE: It is impossible to find an export that is in failed
1530 * state with this function
1533 uuid_compare(void *key, cfs_hlist_node_t *hnode)
1535 struct obd_export *exp;
1538 exp = cfs_hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1540 RETURN(obd_uuid_equals((struct obd_uuid *)key,&exp->exp_client_uuid) &&
1545 uuid_export_get(cfs_hlist_node_t *hnode)
1547 struct obd_export *exp;
1549 exp = cfs_hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1550 class_export_get(exp);
1556 uuid_export_put(cfs_hlist_node_t *hnode)
1558 struct obd_export *exp;
1560 exp = cfs_hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1561 class_export_put(exp);
1566 static cfs_hash_ops_t uuid_hash_ops = {
1567 .hs_hash = uuid_hash,
1569 .hs_compare = uuid_compare,
1570 .hs_get = uuid_export_get,
1571 .hs_put = uuid_export_put,
1576 * nid<->export hash operations
1580 nid_hash(cfs_hash_t *hs, void *key, unsigned mask)
1582 return cfs_hash_djb2_hash(key, sizeof(lnet_nid_t), mask);
1586 nid_key(cfs_hlist_node_t *hnode)
1588 struct obd_export *exp;
1590 exp = cfs_hlist_entry(hnode, struct obd_export, exp_nid_hash);
1592 RETURN(&exp->exp_connection->c_peer.nid);
1596 * NOTE: It is impossible to find an export that is in failed
1597 * state with this function
1600 nid_compare(void *key, cfs_hlist_node_t *hnode)
1602 struct obd_export *exp;
1605 exp = cfs_hlist_entry(hnode, struct obd_export, exp_nid_hash);
1607 RETURN(exp->exp_connection->c_peer.nid == *(lnet_nid_t *)key &&
1612 nid_export_get(cfs_hlist_node_t *hnode)
1614 struct obd_export *exp;
1616 exp = cfs_hlist_entry(hnode, struct obd_export, exp_nid_hash);
1617 class_export_get(exp);
1623 nid_export_put(cfs_hlist_node_t *hnode)
1625 struct obd_export *exp;
1627 exp = cfs_hlist_entry(hnode, struct obd_export, exp_nid_hash);
1628 class_export_put(exp);
1633 static cfs_hash_ops_t nid_hash_ops = {
1634 .hs_hash = nid_hash,
1636 .hs_compare = nid_compare,
1637 .hs_get = nid_export_get,
1638 .hs_put = nid_export_put,
1643 * nid<->nidstats hash operations
1647 nidstats_key(cfs_hlist_node_t *hnode)
1649 struct nid_stat *ns;
1651 ns = cfs_hlist_entry(hnode, struct nid_stat, nid_hash);
1657 nidstats_compare(void *key, cfs_hlist_node_t *hnode)
1659 RETURN(*(lnet_nid_t *)nidstats_key(hnode) == *(lnet_nid_t *)key);
1663 nidstats_get(cfs_hlist_node_t *hnode)
1665 struct nid_stat *ns;
1667 ns = cfs_hlist_entry(hnode, struct nid_stat, nid_hash);
1674 nidstats_put(cfs_hlist_node_t *hnode)
1676 struct nid_stat *ns;
1678 ns = cfs_hlist_entry(hnode, struct nid_stat, nid_hash);
1684 static cfs_hash_ops_t nid_stat_hash_ops = {
1685 .hs_hash = nid_hash,
1686 .hs_key = nidstats_key,
1687 .hs_compare = nidstats_compare,
1688 .hs_get = nidstats_get,
1689 .hs_put = nidstats_put,