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staging: lustre: remove RETURN macro
[deliverable/linux.git] / drivers / staging / lustre / lustre / obdclass / obd_config.c
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d7e09d03
PT		 1/*
2 * GPL HEADER START
3 *
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
19 *
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
22 * have any questions.
23 *
24 * GPL HEADER END
25 */
26/*
27 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
29 *
30 * Copyright (c) 2011, 2012, Intel Corporation.
31 */
32/*
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
35 *
36 * lustre/obdclass/obd_config.c
37 *
38 * Config API
39 */
40
41#define DEBUG_SUBSYSTEM S_CLASS
42#include <obd_class.h>
43#include <linux/string.h>
44#include <lustre_log.h>
45#include <lprocfs_status.h>
46#include <lustre_param.h>
47
48#include "llog_internal.h"
49
50static cfs_hash_ops_t uuid_hash_ops;
51static cfs_hash_ops_t nid_hash_ops;
52static cfs_hash_ops_t nid_stat_hash_ops;
53
54/*********** string parsing utils *********/
55
56/* returns 0 if we find this key in the buffer, else 1 */
57int class_find_param(char *buf, char *key, char **valp)
58{
59 char *ptr;
60
61 if (!buf)
62 return 1;
63
64 if ((ptr = strstr(buf, key)) == NULL)
65 return 1;
66
67 if (valp)
68 *valp = ptr + strlen(key);
69
70 return 0;
71}
72EXPORT_SYMBOL(class_find_param);
73
74/**
75 * Check whether the proc parameter \a param is an old parameter or not from
76 * the array \a ptr which contains the mapping from old parameters to new ones.
77 * If it's an old one, then return the pointer to the cfg_interop_param struc-
78 * ture which contains both the old and new parameters.
79 *
80 * \param param proc parameter
81 * \param ptr an array which contains the mapping from
82 * old parameters to new ones
83 *
84 * \retval valid-pointer pointer to the cfg_interop_param structure
85 * which contains the old and new parameters
86 * \retval NULL \a param or \a ptr is NULL,
87 * or \a param is not an old parameter
88 */
89struct cfg_interop_param *class_find_old_param(const char *param,
90 struct cfg_interop_param *ptr)
91{
92 char *value = NULL;
93 int name_len = 0;
94
95 if (param == NULL || ptr == NULL)
0a3bdb00 96 return NULL;
d7e09d03
PT		 97
98 value = strchr(param, '=');
99 if (value == NULL)
100 name_len = strlen(param);
101 else
102 name_len = value - param;
103
104 while (ptr->old_param != NULL) {
105 if (strncmp(param, ptr->old_param, name_len) == 0 &&
106 name_len == strlen(ptr->old_param))
0a3bdb00 107 return ptr;
d7e09d03
PT		 108 ptr++;
109 }
110
0a3bdb00 111 return NULL;
d7e09d03
PT		 112}
113EXPORT_SYMBOL(class_find_old_param);
114
115/**
116 * Finds a parameter in \a params and copies it to \a copy.
117 *
118 * Leading spaces are skipped. Next space or end of string is the
119 * parameter terminator with the exception that spaces inside single or double
120 * quotes get included into a parameter. The parameter is copied into \a copy
121 * which has to be allocated big enough by a caller, quotes are stripped in
122 * the copy and the copy is terminated by 0.
123 *
124 * On return \a params is set to next parameter or to NULL if last
125 * parameter is returned.
126 *
127 * \retval 0 if parameter is returned in \a copy
128 * \retval 1 otherwise
129 * \retval -EINVAL if unbalanced quota is found
130 */
131int class_get_next_param(char **params, char *copy)
132{
133 char *q1, *q2, *str;
134 int len;
135
136 str = *params;
137 while (*str == ' ')
138 str++;
139
140 if (*str == '\0') {
141 *params = NULL;
142 return 1;
143 }
144
145 while (1) {
146 q1 = strpbrk(str, " '\"");
147 if (q1 == NULL) {
148 len = strlen(str);
149 memcpy(copy, str, len);
150 copy[len] = '\0';
151 *params = NULL;
152 return 0;
153 }
154 len = q1 - str;
155 if (*q1 == ' ') {
156 memcpy(copy, str, len);
157 copy[len] = '\0';
158 *params = str + len;
159 return 0;
160 }
161
162 memcpy(copy, str, len);
163 copy += len;
164
165 /* search for the matching closing quote */
166 str = q1 + 1;
167 q2 = strchr(str, *q1);
168 if (q2 == NULL) {
169 CERROR("Unbalanced quota in parameters: \"%s\"\n",
170 *params);
171 return -EINVAL;
172 }
173 len = q2 - str;
174 memcpy(copy, str, len);
175 copy += len;
176 str = q2 + 1;
177 }
178 return 1;
179}
180EXPORT_SYMBOL(class_get_next_param);
181
182/* returns 0 if this is the first key in the buffer, else 1.
183 valp points to first char after key. */
184int class_match_param(char *buf, char *key, char **valp)
185{
186 if (!buf)
187 return 1;
188
189 if (memcmp(buf, key, strlen(key)) != 0)
190 return 1;
191
192 if (valp)
193 *valp = buf + strlen(key);
194
195 return 0;
196}
197EXPORT_SYMBOL(class_match_param);
198
199static int parse_nid(char *buf, void *value, int quiet)
200{
201 lnet_nid_t *nid = (lnet_nid_t *)value;
202
203 *nid = libcfs_str2nid(buf);
204 if (*nid != LNET_NID_ANY)
205 return 0;
206
207 if (!quiet)
208 LCONSOLE_ERROR_MSG(0x159, "Can't parse NID '%s'\n", buf);
209 return -EINVAL;
210}
211
212static int parse_net(char *buf, void *value)
213{
214 __u32 *net = (__u32 *)value;
215
216 *net = libcfs_str2net(buf);
217 CDEBUG(D_INFO, "Net %s\n", libcfs_net2str(*net));
218 return 0;
219}
220
221enum {
222 CLASS_PARSE_NID = 1,
223 CLASS_PARSE_NET,
224};
225
226/* 0 is good nid,
227 1 not found
228 < 0 error
229 endh is set to next separator */
230static int class_parse_value(char *buf, int opc, void *value, char **endh,
231 int quiet)
232{
233 char *endp;
234 char tmp;
235 int rc = 0;
236
237 if (!buf)
238 return 1;
239 while (*buf == ',' || *buf == ':')
240 buf++;
241 if (*buf == ' ' || *buf == '/' || *buf == '\0')
242 return 1;
243
244 /* nid separators or end of nids */
245 endp = strpbrk(buf, ",: /");
246 if (endp == NULL)
247 endp = buf + strlen(buf);
248
249 tmp = *endp;
250 *endp = '\0';
251 switch (opc) {
252 default:
253 LBUG();
254 case CLASS_PARSE_NID:
255 rc = parse_nid(buf, value, quiet);
256 break;
257 case CLASS_PARSE_NET:
258 rc = parse_net(buf, value);
259 break;
260 }
261 *endp = tmp;
262 if (rc != 0)
263 return rc;
264 if (endh)
265 *endh = endp;
266 return 0;
267}
268
269int class_parse_nid(char *buf, lnet_nid_t *nid, char **endh)
270{
271 return class_parse_value(buf, CLASS_PARSE_NID, (void *)nid, endh, 0);
272}
273EXPORT_SYMBOL(class_parse_nid);
274
275int class_parse_nid_quiet(char *buf, lnet_nid_t *nid, char **endh)
276{
277 return class_parse_value(buf, CLASS_PARSE_NID, (void *)nid, endh, 1);
278}
279EXPORT_SYMBOL(class_parse_nid_quiet);
280
281int class_parse_net(char *buf, __u32 *net, char **endh)
282{
283 return class_parse_value(buf, CLASS_PARSE_NET, (void *)net, endh, 0);
284}
285EXPORT_SYMBOL(class_parse_net);
286
287/* 1 param contains key and match
288 * 0 param contains key and not match
289 * -1 param does not contain key
290 */
291int class_match_nid(char *buf, char *key, lnet_nid_t nid)
292{
293 lnet_nid_t tmp;
294 int rc = -1;
295
296 while (class_find_param(buf, key, &buf) == 0) {
297 /* please restrict to the nids pertaining to
298 * the specified nids */
299 while (class_parse_nid(buf, &tmp, &buf) == 0) {
300 if (tmp == nid)
301 return 1;
302 }
303 rc = 0;
304 }
305 return rc;
306}
307EXPORT_SYMBOL(class_match_nid);
308
309int class_match_net(char *buf, char *key, __u32 net)
310{
311 __u32 tmp;
312 int rc = -1;
313
314 while (class_find_param(buf, key, &buf) == 0) {
315 /* please restrict to the nids pertaining to
316 * the specified networks */
317 while (class_parse_net(buf, &tmp, &buf) == 0) {
318 if (tmp == net)
319 return 1;
320 }
321 rc = 0;
322 }
323 return rc;
324}
325EXPORT_SYMBOL(class_match_net);
326
327/********************** class fns **********************/
328
329/**
330 * Create a new obd device and set the type, name and uuid. If successful,
331 * the new device can be accessed by either name or uuid.
332 */
333int class_attach(struct lustre_cfg *lcfg)
334{
335 struct obd_device *obd = NULL;
336 char *typename, *name, *uuid;
337 int rc, len;
d7e09d03
PT		 338
339 if (!LUSTRE_CFG_BUFLEN(lcfg, 1)) {
340 CERROR("No type passed!\n");
0a3bdb00 341 return -EINVAL;
d7e09d03
PT		 342 }
343 typename = lustre_cfg_string(lcfg, 1);
344
345 if (!LUSTRE_CFG_BUFLEN(lcfg, 0)) {
346 CERROR("No name passed!\n");
0a3bdb00 347 return -EINVAL;
d7e09d03
PT		 348 }
349 name = lustre_cfg_string(lcfg, 0);
350
351 if (!LUSTRE_CFG_BUFLEN(lcfg, 2)) {
352 CERROR("No UUID passed!\n");
0a3bdb00 353 return -EINVAL;
d7e09d03
PT		 354 }
355 uuid = lustre_cfg_string(lcfg, 2);
356
357 CDEBUG(D_IOCTL, "attach type %s name: %s uuid: %s\n",
358 MKSTR(typename), MKSTR(name), MKSTR(uuid));
359
360 obd = class_newdev(typename, name);
361 if (IS_ERR(obd)) {
362 /* Already exists or out of obds */
363 rc = PTR_ERR(obd);
364 obd = NULL;
365 CERROR("Cannot create device %s of type %s : %d\n",
366 name, typename, rc);
367 GOTO(out, rc);
368 }
369 LASSERTF(obd != NULL, "Cannot get obd device %s of type %s\n",
370 name, typename);
371 LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
372 "obd %p obd_magic %08X != %08X\n",
373 obd, obd->obd_magic, OBD_DEVICE_MAGIC);
374 LASSERTF(strncmp(obd->obd_name, name, strlen(name)) == 0,
375 "%p obd_name %s != %s\n", obd, obd->obd_name, name);
376
377 rwlock_init(&obd->obd_pool_lock);
378 obd->obd_pool_limit = 0;
379 obd->obd_pool_slv = 0;
380
381 INIT_LIST_HEAD(&obd->obd_exports);
382 INIT_LIST_HEAD(&obd->obd_unlinked_exports);
383 INIT_LIST_HEAD(&obd->obd_delayed_exports);
384 INIT_LIST_HEAD(&obd->obd_exports_timed);
385 INIT_LIST_HEAD(&obd->obd_nid_stats);
386 spin_lock_init(&obd->obd_nid_lock);
387 spin_lock_init(&obd->obd_dev_lock);
388 mutex_init(&obd->obd_dev_mutex);
389 spin_lock_init(&obd->obd_osfs_lock);
390 /* obd->obd_osfs_age must be set to a value in the distant
391 * past to guarantee a fresh statfs is fetched on mount. */
392 obd->obd_osfs_age = cfs_time_shift_64(-1000);
393
394 /* XXX belongs in setup not attach */
395 init_rwsem(&obd->obd_observer_link_sem);
396 /* recovery data */
397 cfs_init_timer(&obd->obd_recovery_timer);
398 spin_lock_init(&obd->obd_recovery_task_lock);
399 init_waitqueue_head(&obd->obd_next_transno_waitq);
400 init_waitqueue_head(&obd->obd_evict_inprogress_waitq);
401 INIT_LIST_HEAD(&obd->obd_req_replay_queue);
402 INIT_LIST_HEAD(&obd->obd_lock_replay_queue);
403 INIT_LIST_HEAD(&obd->obd_final_req_queue);
404 INIT_LIST_HEAD(&obd->obd_evict_list);
405
406 llog_group_init(&obd->obd_olg, FID_SEQ_LLOG);
407
408 obd->obd_conn_inprogress = 0;
409
410 len = strlen(uuid);
411 if (len >= sizeof(obd->obd_uuid)) {
412 CERROR("uuid must be < %d bytes long\n",
413 (int)sizeof(obd->obd_uuid));
414 GOTO(out, rc = -EINVAL);
415 }
416 memcpy(obd->obd_uuid.uuid, uuid, len);
417
418 /* do the attach */
419 if (OBP(obd, attach)) {
420 rc = OBP(obd,attach)(obd, sizeof *lcfg, lcfg);
421 if (rc)
422 GOTO(out, rc = -EINVAL);
423 }
424
425 /* Detach drops this */
426 spin_lock(&obd->obd_dev_lock);
427 atomic_set(&obd->obd_refcount, 1);
428 spin_unlock(&obd->obd_dev_lock);
429 lu_ref_init(&obd->obd_reference);
430 lu_ref_add(&obd->obd_reference, "attach", obd);
431
432 obd->obd_attached = 1;
433 CDEBUG(D_IOCTL, "OBD: dev %d attached type %s with refcount %d\n",
434 obd->obd_minor, typename, atomic_read(&obd->obd_refcount));
0a3bdb00 435 return 0;
d7e09d03
PT		 436 out:
437 if (obd != NULL) {
438 class_release_dev(obd);
439 }
440 return rc;
441}
442EXPORT_SYMBOL(class_attach);
443
444/** Create hashes, self-export, and call type-specific setup.
445 * Setup is effectively the "start this obd" call.
446 */
447int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
448{
449 int err = 0;
450 struct obd_export *exp;
d7e09d03
PT		 451
452 LASSERT(obd != NULL);
453 LASSERTF(obd == class_num2obd(obd->obd_minor),
454 "obd %p != obd_devs[%d] %p\n",
455 obd, obd->obd_minor, class_num2obd(obd->obd_minor));
456 LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
457 "obd %p obd_magic %08x != %08x\n",
458 obd, obd->obd_magic, OBD_DEVICE_MAGIC);
459
460 /* have we attached a type to this device? */
461 if (!obd->obd_attached) {
462 CERROR("Device %d not attached\n", obd->obd_minor);
0a3bdb00 463 return -ENODEV;
d7e09d03
PT		 464 }
465
466 if (obd->obd_set_up) {
467 CERROR("Device %d already setup (type %s)\n",
468 obd->obd_minor, obd->obd_type->typ_name);
0a3bdb00 469 return -EEXIST;
d7e09d03
PT		 470 }
471
472 /* is someone else setting us up right now? (attach inits spinlock) */
473 spin_lock(&obd->obd_dev_lock);
474 if (obd->obd_starting) {
475 spin_unlock(&obd->obd_dev_lock);
476 CERROR("Device %d setup in progress (type %s)\n",
477 obd->obd_minor, obd->obd_type->typ_name);
0a3bdb00 478 return -EEXIST;
d7e09d03
PT		 479 }
480 /* just leave this on forever. I can't use obd_set_up here because
481 other fns check that status, and we're not actually set up yet. */
482 obd->obd_starting = 1;
483 obd->obd_uuid_hash = NULL;
484 obd->obd_nid_hash = NULL;
485 obd->obd_nid_stats_hash = NULL;
486 spin_unlock(&obd->obd_dev_lock);
487
488 /* create an uuid-export lustre hash */
489 obd->obd_uuid_hash = cfs_hash_create("UUID_HASH",
490 HASH_UUID_CUR_BITS,
491 HASH_UUID_MAX_BITS,
492 HASH_UUID_BKT_BITS, 0,
493 CFS_HASH_MIN_THETA,
494 CFS_HASH_MAX_THETA,
495 &uuid_hash_ops, CFS_HASH_DEFAULT);
496 if (!obd->obd_uuid_hash)
497 GOTO(err_hash, err = -ENOMEM);
498
499 /* create a nid-export lustre hash */
500 obd->obd_nid_hash = cfs_hash_create("NID_HASH",
501 HASH_NID_CUR_BITS,
502 HASH_NID_MAX_BITS,
503 HASH_NID_BKT_BITS, 0,
504 CFS_HASH_MIN_THETA,
505 CFS_HASH_MAX_THETA,
506 &nid_hash_ops, CFS_HASH_DEFAULT);
507 if (!obd->obd_nid_hash)
508 GOTO(err_hash, err = -ENOMEM);
509
510 /* create a nid-stats lustre hash */
511 obd->obd_nid_stats_hash = cfs_hash_create("NID_STATS",
512 HASH_NID_STATS_CUR_BITS,
513 HASH_NID_STATS_MAX_BITS,
514 HASH_NID_STATS_BKT_BITS, 0,
515 CFS_HASH_MIN_THETA,
516 CFS_HASH_MAX_THETA,
517 &nid_stat_hash_ops, CFS_HASH_DEFAULT);
518 if (!obd->obd_nid_stats_hash)
519 GOTO(err_hash, err = -ENOMEM);
520
521 exp = class_new_export(obd, &obd->obd_uuid);
522 if (IS_ERR(exp))
523 GOTO(err_hash, err = PTR_ERR(exp));
524
525 obd->obd_self_export = exp;
526 list_del_init(&exp->exp_obd_chain_timed);
527 class_export_put(exp);
528
529 err = obd_setup(obd, lcfg);
530 if (err)
531 GOTO(err_exp, err);
532
533 obd->obd_set_up = 1;
534
535 spin_lock(&obd->obd_dev_lock);
536 /* cleanup drops this */
537 class_incref(obd, "setup", obd);
538 spin_unlock(&obd->obd_dev_lock);
539
540 CDEBUG(D_IOCTL, "finished setup of obd %s (uuid %s)\n",
541 obd->obd_name, obd->obd_uuid.uuid);
542
0a3bdb00 543 return 0;
d7e09d03
PT		 544err_exp:
545 if (obd->obd_self_export) {
546 class_unlink_export(obd->obd_self_export);
547 obd->obd_self_export = NULL;
548 }
549err_hash:
550 if (obd->obd_uuid_hash) {
551 cfs_hash_putref(obd->obd_uuid_hash);
552 obd->obd_uuid_hash = NULL;
553 }
554 if (obd->obd_nid_hash) {
555 cfs_hash_putref(obd->obd_nid_hash);
556 obd->obd_nid_hash = NULL;
557 }
558 if (obd->obd_nid_stats_hash) {
559 cfs_hash_putref(obd->obd_nid_stats_hash);
560 obd->obd_nid_stats_hash = NULL;
561 }
562 obd->obd_starting = 0;
563 CERROR("setup %s failed (%d)\n", obd->obd_name, err);
564 return err;
565}
566EXPORT_SYMBOL(class_setup);
567
568/** We have finished using this obd and are ready to destroy it.
569 * There can be no more references to this obd.
570 */
571int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg)
572{
d7e09d03
PT		 573 if (obd->obd_set_up) {
574 CERROR("OBD device %d still set up\n", obd->obd_minor);
0a3bdb00 575 return -EBUSY;
d7e09d03
PT		 576 }
577
578 spin_lock(&obd->obd_dev_lock);
579 if (!obd->obd_attached) {
580 spin_unlock(&obd->obd_dev_lock);
581 CERROR("OBD device %d not attached\n", obd->obd_minor);
0a3bdb00 582 return -ENODEV;
d7e09d03
PT		 583 }
584 obd->obd_attached = 0;
585 spin_unlock(&obd->obd_dev_lock);
586
587 CDEBUG(D_IOCTL, "detach on obd %s (uuid %s)\n",
588 obd->obd_name, obd->obd_uuid.uuid);
589
590 class_decref(obd, "attach", obd);
0a3bdb00 591 return 0;
d7e09d03
PT		 592}
593EXPORT_SYMBOL(class_detach);
594
595/** Start shutting down the obd. There may be in-progess ops when
596 * this is called. We tell them to start shutting down with a call
597 * to class_disconnect_exports().
598 */
599int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg)
600{
601 int err = 0;
602 char *flag;
d7e09d03
PT		 603
604 OBD_RACE(OBD_FAIL_LDLM_RECOV_CLIENTS);
605
606 if (!obd->obd_set_up) {
607 CERROR("Device %d not setup\n", obd->obd_minor);
0a3bdb00 608 return -ENODEV;
d7e09d03
PT		 609 }
610
611 spin_lock(&obd->obd_dev_lock);
612 if (obd->obd_stopping) {
613 spin_unlock(&obd->obd_dev_lock);
614 CERROR("OBD %d already stopping\n", obd->obd_minor);
0a3bdb00 615 return -ENODEV;
d7e09d03
PT		 616 }
617 /* Leave this on forever */
618 obd->obd_stopping = 1;
619
620 /* wait for already-arrived-connections to finish. */
621 while (obd->obd_conn_inprogress > 0) {
622 spin_unlock(&obd->obd_dev_lock);
623
624 cond_resched();
625
626 spin_lock(&obd->obd_dev_lock);
627 }
628 spin_unlock(&obd->obd_dev_lock);
629
630 if (lcfg->lcfg_bufcount >= 2 && LUSTRE_CFG_BUFLEN(lcfg, 1) > 0) {
631 for (flag = lustre_cfg_string(lcfg, 1); *flag != 0; flag++)
632 switch (*flag) {
633 case 'F':
634 obd->obd_force = 1;
635 break;
636 case 'A':
637 LCONSOLE_WARN("Failing over %s\n",
638 obd->obd_name);
639 obd->obd_fail = 1;
640 obd->obd_no_transno = 1;
641 obd->obd_no_recov = 1;
642 if (OBP(obd, iocontrol)) {
643 obd_iocontrol(OBD_IOC_SYNC,
644 obd->obd_self_export,
645 0, NULL, NULL);
646 }
647 break;
648 default:
649 CERROR("Unrecognised flag '%c'\n", *flag);
650 }
651 }
652
653 LASSERT(obd->obd_self_export);
654
655 /* The three references that should be remaining are the
656 * obd_self_export and the attach and setup references. */
657 if (atomic_read(&obd->obd_refcount) > 3) {
658 /* refcounf - 3 might be the number of real exports
659 (excluding self export). But class_incref is called
660 by other things as well, so don't count on it. */
661 CDEBUG(D_IOCTL, "%s: forcing exports to disconnect: %d\n",
662 obd->obd_name, atomic_read(&obd->obd_refcount) - 3);
663 dump_exports(obd, 0);
664 class_disconnect_exports(obd);
665 }
666
667 /* Precleanup, we must make sure all exports get destroyed. */
668 err = obd_precleanup(obd, OBD_CLEANUP_EXPORTS);
669 if (err)
670 CERROR("Precleanup %s returned %d\n",
671 obd->obd_name, err);
672
673 /* destroy an uuid-export hash body */
674 if (obd->obd_uuid_hash) {
675 cfs_hash_putref(obd->obd_uuid_hash);
676 obd->obd_uuid_hash = NULL;
677 }
678
679 /* destroy a nid-export hash body */
680 if (obd->obd_nid_hash) {
681 cfs_hash_putref(obd->obd_nid_hash);
682 obd->obd_nid_hash = NULL;
683 }
684
685 /* destroy a nid-stats hash body */
686 if (obd->obd_nid_stats_hash) {
687 cfs_hash_putref(obd->obd_nid_stats_hash);
688 obd->obd_nid_stats_hash = NULL;
689 }
690
691 class_decref(obd, "setup", obd);
692 obd->obd_set_up = 0;
693
0a3bdb00 694 return 0;
d7e09d03
PT		 695}
696EXPORT_SYMBOL(class_cleanup);
697
698struct obd_device *class_incref(struct obd_device *obd,
699 const char *scope, const void *source)
700{
701 lu_ref_add_atomic(&obd->obd_reference, scope, source);
702 atomic_inc(&obd->obd_refcount);
703 CDEBUG(D_INFO, "incref %s (%p) now %d\n", obd->obd_name, obd,
704 atomic_read(&obd->obd_refcount));
705
706 return obd;
707}
708EXPORT_SYMBOL(class_incref);
709
710void class_decref(struct obd_device *obd, const char *scope, const void *source)
711{
712 int err;
713 int refs;
714
715 spin_lock(&obd->obd_dev_lock);
716 atomic_dec(&obd->obd_refcount);
717 refs = atomic_read(&obd->obd_refcount);
718 spin_unlock(&obd->obd_dev_lock);
719 lu_ref_del(&obd->obd_reference, scope, source);
720
721 CDEBUG(D_INFO, "Decref %s (%p) now %d\n", obd->obd_name, obd, refs);
722
723 if ((refs == 1) && obd->obd_stopping) {
724 /* All exports have been destroyed; there should
725 be no more in-progress ops by this point.*/
726
727 spin_lock(&obd->obd_self_export->exp_lock);
728 obd->obd_self_export->exp_flags |= exp_flags_from_obd(obd);
729 spin_unlock(&obd->obd_self_export->exp_lock);
730
731 /* note that we'll recurse into class_decref again */
732 class_unlink_export(obd->obd_self_export);
733 return;
734 }
735
736 if (refs == 0) {
737 CDEBUG(D_CONFIG, "finishing cleanup of obd %s (%s)\n",
738 obd->obd_name, obd->obd_uuid.uuid);
739 LASSERT(!obd->obd_attached);
740 if (obd->obd_stopping) {
741 /* If we're not stopping, we were never set up */
742 err = obd_cleanup(obd);
743 if (err)
744 CERROR("Cleanup %s returned %d\n",
745 obd->obd_name, err);
746 }
747 if (OBP(obd, detach)) {
748 err = OBP(obd, detach)(obd);
749 if (err)
750 CERROR("Detach returned %d\n", err);
751 }
752 class_release_dev(obd);
753 }
754}
755EXPORT_SYMBOL(class_decref);
756
757/** Add a failover nid location.
758 * Client obd types contact server obd types using this nid list.
759 */
760int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
761{
762 struct obd_import *imp;
763 struct obd_uuid uuid;
764 int rc;
d7e09d03
PT		 765
766 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
767 LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
768 CERROR("invalid conn_uuid\n");
0a3bdb00 769 return -EINVAL;
d7e09d03
PT		 770 }
771 if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
772 strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) &&
773 strcmp(obd->obd_type->typ_name, LUSTRE_OSP_NAME) &&
774 strcmp(obd->obd_type->typ_name, LUSTRE_LWP_NAME) &&
775 strcmp(obd->obd_type->typ_name, LUSTRE_MGC_NAME)) {
776 CERROR("can't add connection on non-client dev\n");
0a3bdb00 777 return -EINVAL;
d7e09d03
PT		 778 }
779
780 imp = obd->u.cli.cl_import;
781 if (!imp) {
782 CERROR("try to add conn on immature client dev\n");
0a3bdb00 783 return -EINVAL;
d7e09d03
PT		 784 }
785
786 obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
787 rc = obd_add_conn(imp, &uuid, lcfg->lcfg_num);
788
0a3bdb00 789 return rc;
d7e09d03
PT		 790}
791EXPORT_SYMBOL(class_add_conn);
792
793/** Remove a failover nid location.
794 */
795int class_del_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
796{
797 struct obd_import *imp;
798 struct obd_uuid uuid;
799 int rc;
d7e09d03
PT		 800
801 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
802 LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
803 CERROR("invalid conn_uuid\n");
0a3bdb00 804 return -EINVAL;
d7e09d03
PT		 805 }
806 if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
807 strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME)) {
808 CERROR("can't del connection on non-client dev\n");
0a3bdb00 809 return -EINVAL;
d7e09d03
PT		 810 }
811
812 imp = obd->u.cli.cl_import;
813 if (!imp) {
814 CERROR("try to del conn on immature client dev\n");
0a3bdb00 815 return -EINVAL;
d7e09d03
PT		 816 }
817
818 obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
819 rc = obd_del_conn(imp, &uuid);
820
0a3bdb00 821 return rc;
d7e09d03
PT		 822}
823
824LIST_HEAD(lustre_profile_list);
825
826struct lustre_profile *class_get_profile(const char * prof)
827{
828 struct lustre_profile *lprof;
829
d7e09d03
PT		 830 list_for_each_entry(lprof, &lustre_profile_list, lp_list) {
831 if (!strcmp(lprof->lp_profile, prof)) {
0a3bdb00 832 return lprof;
d7e09d03
PT		 833 }
834 }
0a3bdb00 835 return NULL;
d7e09d03
PT		 836}
837EXPORT_SYMBOL(class_get_profile);
838
839/** Create a named "profile".
840 * This defines the mdc and osc names to use for a client.
841 * This also is used to define the lov to be used by a mdt.
842 */
843int class_add_profile(int proflen, char *prof, int osclen, char *osc,
844 int mdclen, char *mdc)
845{
846 struct lustre_profile *lprof;
847 int err = 0;
d7e09d03
PT		 848
849 CDEBUG(D_CONFIG, "Add profile %s\n", prof);
850
851 OBD_ALLOC(lprof, sizeof(*lprof));
852 if (lprof == NULL)
0a3bdb00 853 return -ENOMEM;
d7e09d03
PT		 854 INIT_LIST_HEAD(&lprof->lp_list);
855
856 LASSERT(proflen == (strlen(prof) + 1));
857 OBD_ALLOC(lprof->lp_profile, proflen);
858 if (lprof->lp_profile == NULL)
859 GOTO(out, err = -ENOMEM);
860 memcpy(lprof->lp_profile, prof, proflen);
861
862 LASSERT(osclen == (strlen(osc) + 1));
863 OBD_ALLOC(lprof->lp_dt, osclen);
864 if (lprof->lp_dt == NULL)
865 GOTO(out, err = -ENOMEM);
866 memcpy(lprof->lp_dt, osc, osclen);
867
868 if (mdclen > 0) {
869 LASSERT(mdclen == (strlen(mdc) + 1));
870 OBD_ALLOC(lprof->lp_md, mdclen);
871 if (lprof->lp_md == NULL)
872 GOTO(out, err = -ENOMEM);
873 memcpy(lprof->lp_md, mdc, mdclen);
874 }
875
876 list_add(&lprof->lp_list, &lustre_profile_list);
0a3bdb00 877 return err;
d7e09d03
PT		 878
879out:
880 if (lprof->lp_md)
881 OBD_FREE(lprof->lp_md, mdclen);
882 if (lprof->lp_dt)
883 OBD_FREE(lprof->lp_dt, osclen);
884 if (lprof->lp_profile)
885 OBD_FREE(lprof->lp_profile, proflen);
886 OBD_FREE(lprof, sizeof(*lprof));
0a3bdb00 887 return err;
d7e09d03
PT		 888}
889
890void class_del_profile(const char *prof)
891{
892 struct lustre_profile *lprof;
d7e09d03
PT		 893
894 CDEBUG(D_CONFIG, "Del profile %s\n", prof);
895
896 lprof = class_get_profile(prof);
897 if (lprof) {
898 list_del(&lprof->lp_list);
899 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
900 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
901 if (lprof->lp_md)
902 OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
903 OBD_FREE(lprof, sizeof *lprof);
904 }
d7e09d03
PT		 905}
906EXPORT_SYMBOL(class_del_profile);
907
908/* COMPAT_146 */
909void class_del_profiles(void)
910{
911 struct lustre_profile *lprof, *n;
d7e09d03
PT		 912
913 list_for_each_entry_safe(lprof, n, &lustre_profile_list, lp_list) {
914 list_del(&lprof->lp_list);
915 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
916 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
917 if (lprof->lp_md)
918 OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
919 OBD_FREE(lprof, sizeof *lprof);
920 }
d7e09d03
PT		 921}
922EXPORT_SYMBOL(class_del_profiles);
923
924static int class_set_global(char *ptr, int val, struct lustre_cfg *lcfg)
925{
d7e09d03
PT		 926 if (class_match_param(ptr, PARAM_AT_MIN, NULL) == 0)
927 at_min = val;
928 else if (class_match_param(ptr, PARAM_AT_MAX, NULL) == 0)
929 at_max = val;
930 else if (class_match_param(ptr, PARAM_AT_EXTRA, NULL) == 0)
931 at_extra = val;
932 else if (class_match_param(ptr, PARAM_AT_EARLY_MARGIN, NULL) == 0)
933 at_early_margin = val;
934 else if (class_match_param(ptr, PARAM_AT_HISTORY, NULL) == 0)
935 at_history = val;
936 else if (class_match_param(ptr, PARAM_JOBID_VAR, NULL) == 0)
937 strlcpy(obd_jobid_var, lustre_cfg_string(lcfg, 2),
938 JOBSTATS_JOBID_VAR_MAX_LEN + 1);
939 else
0a3bdb00 940 return -EINVAL;
d7e09d03
PT		 941
942 CDEBUG(D_IOCTL, "global %s = %d\n", ptr, val);
0a3bdb00 943 return 0;
d7e09d03
PT		 944}
945
946
947/* We can't call ll_process_config or lquota_process_config directly because
948 * it lives in a module that must be loaded after this one. */
949static int (*client_process_config)(struct lustre_cfg *lcfg) = NULL;
950static int (*quota_process_config)(struct lustre_cfg *lcfg) = NULL;
951
952void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg))
953{
954 client_process_config = cpc;
955}
956EXPORT_SYMBOL(lustre_register_client_process_config);
957
958/**
959 * Rename the proc parameter in \a cfg with a new name \a new_name.
960 *
961 * \param cfg config structure which contains the proc parameter
962 * \param new_name new name of the proc parameter
963 *
964 * \retval valid-pointer pointer to the newly-allocated config structure
965 * which contains the renamed proc parameter
966 * \retval ERR_PTR(-EINVAL) if \a cfg or \a new_name is NULL, or \a cfg does
967 * not contain a proc parameter
968 * \retval ERR_PTR(-ENOMEM) if memory allocation failure occurs
969 */
970struct lustre_cfg *lustre_cfg_rename(struct lustre_cfg *cfg,
971 const char *new_name)
972{
973 struct lustre_cfg_bufs *bufs = NULL;
974 struct lustre_cfg *new_cfg = NULL;
975 char *param = NULL;
976 char *new_param = NULL;
977 char *value = NULL;
978 int name_len = 0;
979 int new_len = 0;
d7e09d03
PT		 980
981 if (cfg == NULL || new_name == NULL)
0a3bdb00 982 return ERR_PTR(-EINVAL);
d7e09d03
PT		 983
984 param = lustre_cfg_string(cfg, 1);
985 if (param == NULL)
0a3bdb00 986 return ERR_PTR(-EINVAL);
d7e09d03
PT		 987
988 value = strchr(param, '=');
989 if (value == NULL)
990 name_len = strlen(param);
991 else
992 name_len = value - param;
993
994 new_len = LUSTRE_CFG_BUFLEN(cfg, 1) + strlen(new_name) - name_len;
995
996 OBD_ALLOC(new_param, new_len);
997 if (new_param == NULL)
0a3bdb00 998 return ERR_PTR(-ENOMEM);
d7e09d03
PT		 999
1000 strcpy(new_param, new_name);
1001 if (value != NULL)
1002 strcat(new_param, value);
1003
1004 OBD_ALLOC_PTR(bufs);
1005 if (bufs == NULL) {
1006 OBD_FREE(new_param, new_len);
0a3bdb00 1007 return ERR_PTR(-ENOMEM);
d7e09d03
PT		 1008 }
1009
1010 lustre_cfg_bufs_reset(bufs, NULL);
1011 lustre_cfg_bufs_init(bufs, cfg);
1012 lustre_cfg_bufs_set_string(bufs, 1, new_param);
1013
1014 new_cfg = lustre_cfg_new(cfg->lcfg_command, bufs);
1015
1016 OBD_FREE(new_param, new_len);
1017 OBD_FREE_PTR(bufs);
1018 if (new_cfg == NULL)
0a3bdb00 1019 return ERR_PTR(-ENOMEM);
d7e09d03
PT		 1020
1021 new_cfg->lcfg_num = cfg->lcfg_num;
1022 new_cfg->lcfg_flags = cfg->lcfg_flags;
1023 new_cfg->lcfg_nid = cfg->lcfg_nid;
1024 new_cfg->lcfg_nal = cfg->lcfg_nal;
1025
0a3bdb00 1026 return new_cfg;
d7e09d03
PT		 1027}
1028EXPORT_SYMBOL(lustre_cfg_rename);
1029
1030void lustre_register_quota_process_config(int (*qpc)(struct lustre_cfg *lcfg))
1031{
1032 quota_process_config = qpc;
1033}
1034EXPORT_SYMBOL(lustre_register_quota_process_config);
1035
1036/** Process configuration commands given in lustre_cfg form.
1037 * These may come from direct calls (e.g. class_manual_cleanup)
1038 * or processing the config llog, or ioctl from lctl.
1039 */
1040int class_process_config(struct lustre_cfg *lcfg)
1041{
1042 struct obd_device *obd;
1043 int err;
1044
1045 LASSERT(lcfg && !IS_ERR(lcfg));
1046 CDEBUG(D_IOCTL, "processing cmd: %x\n", lcfg->lcfg_command);
1047
1048 /* Commands that don't need a device */
1049 switch(lcfg->lcfg_command) {
1050 case LCFG_ATTACH: {
1051 err = class_attach(lcfg);
1052 GOTO(out, err);
1053 }
1054 case LCFG_ADD_UUID: {
1055 CDEBUG(D_IOCTL, "adding mapping from uuid %s to nid "LPX64
1056 " (%s)\n", lustre_cfg_string(lcfg, 1),
1057 lcfg->lcfg_nid, libcfs_nid2str(lcfg->lcfg_nid));
1058
1059 err = class_add_uuid(lustre_cfg_string(lcfg, 1), lcfg->lcfg_nid);
1060 GOTO(out, err);
1061 }
1062 case LCFG_DEL_UUID: {
1063 CDEBUG(D_IOCTL, "removing mappings for uuid %s\n",
1064 (lcfg->lcfg_bufcount < 2 || LUSTRE_CFG_BUFLEN(lcfg, 1) == 0)
1065 ? "<all uuids>" : lustre_cfg_string(lcfg, 1));
1066
1067 err = class_del_uuid(lustre_cfg_string(lcfg, 1));
1068 GOTO(out, err);
1069 }
1070 case LCFG_MOUNTOPT: {
1071 CDEBUG(D_IOCTL, "mountopt: profile %s osc %s mdc %s\n",
1072 lustre_cfg_string(lcfg, 1),
1073 lustre_cfg_string(lcfg, 2),
1074 lustre_cfg_string(lcfg, 3));
1075 /* set these mount options somewhere, so ll_fill_super
1076 * can find them. */
1077 err = class_add_profile(LUSTRE_CFG_BUFLEN(lcfg, 1),
1078 lustre_cfg_string(lcfg, 1),
1079 LUSTRE_CFG_BUFLEN(lcfg, 2),
1080 lustre_cfg_string(lcfg, 2),
1081 LUSTRE_CFG_BUFLEN(lcfg, 3),
1082 lustre_cfg_string(lcfg, 3));
1083 GOTO(out, err);
1084 }
1085 case LCFG_DEL_MOUNTOPT: {
1086 CDEBUG(D_IOCTL, "mountopt: profile %s\n",
1087 lustre_cfg_string(lcfg, 1));
1088 class_del_profile(lustre_cfg_string(lcfg, 1));
1089 GOTO(out, err = 0);
1090 }
1091 case LCFG_SET_TIMEOUT: {
1092 CDEBUG(D_IOCTL, "changing lustre timeout from %d to %d\n",
1093 obd_timeout, lcfg->lcfg_num);
1094 obd_timeout = max(lcfg->lcfg_num, 1U);
1095 obd_timeout_set = 1;
1096 GOTO(out, err = 0);
1097 }
1098 case LCFG_SET_LDLM_TIMEOUT: {
1099 CDEBUG(D_IOCTL, "changing lustre ldlm_timeout from %d to %d\n",
1100 ldlm_timeout, lcfg->lcfg_num);
1101 ldlm_timeout = max(lcfg->lcfg_num, 1U);
1102 if (ldlm_timeout >= obd_timeout)
1103 ldlm_timeout = max(obd_timeout / 3, 1U);
1104 ldlm_timeout_set = 1;
1105 GOTO(out, err = 0);
1106 }
1107 case LCFG_SET_UPCALL: {
1108 LCONSOLE_ERROR_MSG(0x15a, "recovery upcall is deprecated\n");
1109 /* COMPAT_146 Don't fail on old configs */
1110 GOTO(out, err = 0);
1111 }
1112 case LCFG_MARKER: {
1113 struct cfg_marker *marker;
1114 marker = lustre_cfg_buf(lcfg, 1);
1115 CDEBUG(D_IOCTL, "marker %d (%#x) %.16s %s\n", marker->cm_step,
1116 marker->cm_flags, marker->cm_tgtname, marker->cm_comment);
1117 GOTO(out, err = 0);
1118 }
1119 case LCFG_PARAM: {
1120 char *tmp;
1121 /* llite has no obd */
1122 if ((class_match_param(lustre_cfg_string(lcfg, 1),
1123 PARAM_LLITE, 0) == 0) &&
1124 client_process_config) {
1125 err = (*client_process_config)(lcfg);
1126 GOTO(out, err);
1127 } else if ((class_match_param(lustre_cfg_string(lcfg, 1),
1128 PARAM_SYS, &tmp) == 0)) {
1129 /* Global param settings */
1130 err = class_set_global(tmp, lcfg->lcfg_num, lcfg);
1131 /*
1132 * Client or server should not fail to mount if
1133 * it hits an unknown configuration parameter.
1134 */
1135 if (err != 0)
1136 CWARN("Ignoring unknown param %s\n", tmp);
1137
1138 GOTO(out, err = 0);
1139 } else if ((class_match_param(lustre_cfg_string(lcfg, 1),
1140 PARAM_QUOTA, &tmp) == 0) &&
1141 quota_process_config) {
1142 err = (*quota_process_config)(lcfg);
1143 GOTO(out, err);
1144 }
1145 /* Fall through */
1146 break;
1147 }
1148 }
1149
1150 /* Commands that require a device */
1151 obd = class_name2obd(lustre_cfg_string(lcfg, 0));
1152 if (obd == NULL) {
1153 if (!LUSTRE_CFG_BUFLEN(lcfg, 0))
1154 CERROR("this lcfg command requires a device name\n");
1155 else
1156 CERROR("no device for: %s\n",
1157 lustre_cfg_string(lcfg, 0));
1158
1159 GOTO(out, err = -EINVAL);
1160 }
1161
1162 switch(lcfg->lcfg_command) {
1163 case LCFG_SETUP: {
1164 err = class_setup(obd, lcfg);
1165 GOTO(out, err);
1166 }
1167 case LCFG_DETACH: {
1168 err = class_detach(obd, lcfg);
1169 GOTO(out, err = 0);
1170 }
1171 case LCFG_CLEANUP: {
1172 err = class_cleanup(obd, lcfg);
1173 GOTO(out, err = 0);
1174 }
1175 case LCFG_ADD_CONN: {
1176 err = class_add_conn(obd, lcfg);
1177 GOTO(out, err = 0);
1178 }
1179 case LCFG_DEL_CONN: {
1180 err = class_del_conn(obd, lcfg);
1181 GOTO(out, err = 0);
1182 }
1183 case LCFG_POOL_NEW: {
1184 err = obd_pool_new(obd, lustre_cfg_string(lcfg, 2));
1185 GOTO(out, err = 0);
1186 break;
1187 }
1188 case LCFG_POOL_ADD: {
1189 err = obd_pool_add(obd, lustre_cfg_string(lcfg, 2),
1190 lustre_cfg_string(lcfg, 3));
1191 GOTO(out, err = 0);
1192 break;
1193 }
1194 case LCFG_POOL_REM: {
1195 err = obd_pool_rem(obd, lustre_cfg_string(lcfg, 2),
1196 lustre_cfg_string(lcfg, 3));
1197 GOTO(out, err = 0);
1198 break;
1199 }
1200 case LCFG_POOL_DEL: {
1201 err = obd_pool_del(obd, lustre_cfg_string(lcfg, 2));
1202 GOTO(out, err = 0);
1203 break;
1204 }
1205 default: {
1206 err = obd_process_config(obd, sizeof(*lcfg), lcfg);
1207 GOTO(out, err);
1208
1209 }
1210 }
1211out:
1212 if ((err < 0) && !(lcfg->lcfg_command & LCFG_REQUIRED)) {
1213 CWARN("Ignoring error %d on optional command %#x\n", err,
1214 lcfg->lcfg_command);
1215 err = 0;
1216 }
1217 return err;
1218}
1219EXPORT_SYMBOL(class_process_config);
1220
1221int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
1222 struct lustre_cfg *lcfg, void *data)
1223{
1224 struct lprocfs_vars *var;
73bb1da6
PT		 1225 struct file fakefile;
1226 struct seq_file fake_seqfile;
d7e09d03
PT		 1227 char *key, *sval;
1228 int i, keylen, vallen;
1229 int matched = 0, j = 0;
1230 int rc = 0;
1231 int skip = 0;
d7e09d03
PT		 1232
1233 if (lcfg->lcfg_command != LCFG_PARAM) {
1234 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
0a3bdb00 1235 return -EINVAL;
d7e09d03
PT		 1236 }
1237
73bb1da6
PT		 1238 /* fake a seq file so that var->fops->write can work... */
1239 fakefile.private_data = &fake_seqfile;
1240 fake_seqfile.private = data;
d7e09d03
PT		 1241 /* e.g. tunefs.lustre --param mdt.group_upcall=foo /r/tmp/lustre-mdt
1242 or lctl conf_param lustre-MDT0000.mdt.group_upcall=bar
1243 or lctl conf_param lustre-OST0000.osc.max_dirty_mb=36 */
1244 for (i = 1; i < lcfg->lcfg_bufcount; i++) {
1245 key = lustre_cfg_buf(lcfg, i);
1246 /* Strip off prefix */
1247 class_match_param(key, prefix, &key);
1248 sval = strchr(key, '=');
1249 if (!sval || (*(sval + 1) == 0)) {
1250 CERROR("Can't parse param %s (missing '=')\n", key);
1251 /* rc = -EINVAL; continue parsing other params */
1252 continue;
1253 }
1254 keylen = sval - key;
1255 sval++;
1256 vallen = strlen(sval);
1257 matched = 0;
1258 j = 0;
1259 /* Search proc entries */
1260 while (lvars[j].name) {
1261 var = &lvars[j];
1262 if (class_match_param(key, (char *)var->name, 0) == 0 &&
1263 keylen == strlen(var->name)) {
1264 matched++;
1265 rc = -EROFS;
73bb1da6 1266 if (var->fops && var->fops->write) {
d7e09d03
PT		 1267 mm_segment_t oldfs;
1268 oldfs = get_fs();
1269 set_fs(KERNEL_DS);
73bb1da6
PT		 1270 rc = (var->fops->write)(&fakefile, sval,
1271 vallen, NULL);
d7e09d03
PT		 1272 set_fs(oldfs);
1273 }
1274 break;
1275 }
1276 j++;
1277 }
1278 if (!matched) {
1279 /* If the prefix doesn't match, return error so we
1280 can pass it down the stack */
1281 if (strnchr(key, keylen, '.'))
0a3bdb00 1282 return -ENOSYS;
d7e09d03
PT		 1283 CERROR("%s: unknown param %s\n",
1284 (char *)lustre_cfg_string(lcfg, 0), key);
1285 /* rc = -EINVAL; continue parsing other params */
1286 skip++;
1287 } else if (rc < 0) {
1288 CERROR("writing proc entry %s err %d\n",
1289 var->name, rc);
1290 rc = 0;
1291 } else {
1292 CDEBUG(D_CONFIG, "%s.%.*s: Set parameter %.*s=%s\n",
1293 lustre_cfg_string(lcfg, 0),
1294 (int)strlen(prefix) - 1, prefix,
1295 (int)(sval - key - 1), key, sval);
1296 }
1297 }
1298
1299 if (rc > 0)
1300 rc = 0;
1301 if (!rc && skip)
1302 rc = skip;
0a3bdb00 1303 return rc;
d7e09d03
PT		 1304}
1305EXPORT_SYMBOL(class_process_proc_param);
1306
1307extern int lustre_check_exclusion(struct super_block *sb, char *svname);
1308
1309/** Parse a configuration llog, doing various manipulations on them
1310 * for various reasons, (modifications for compatibility, skip obsolete
1311 * records, change uuids, etc), then class_process_config() resulting
1312 * net records.
1313 */
1314int class_config_llog_handler(const struct lu_env *env,
1315 struct llog_handle *handle,
1316 struct llog_rec_hdr *rec, void *data)
1317{
1318 struct config_llog_instance *clli = data;
1319 int cfg_len = rec->lrh_len;
1320 char *cfg_buf = (char*) (rec + 1);
1321 int rc = 0;
d7e09d03
PT		 1322
1323 //class_config_dump_handler(handle, rec, data);
1324
1325 switch (rec->lrh_type) {
1326 case OBD_CFG_REC: {
1327 struct lustre_cfg *lcfg, *lcfg_new;
1328 struct lustre_cfg_bufs bufs;
1329 char *inst_name = NULL;
1330 int inst_len = 0;
1331 int inst = 0, swab = 0;
1332
1333 lcfg = (struct lustre_cfg *)cfg_buf;
1334 if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION)) {
1335 lustre_swab_lustre_cfg(lcfg);
1336 swab = 1;
1337 }
1338
1339 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1340 if (rc)
1341 GOTO(out, rc);
1342
1343 /* Figure out config state info */
1344 if (lcfg->lcfg_command == LCFG_MARKER) {
1345 struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1346 lustre_swab_cfg_marker(marker, swab,
1347 LUSTRE_CFG_BUFLEN(lcfg, 1));
1348 CDEBUG(D_CONFIG, "Marker, inst_flg=%#x mark_flg=%#x\n",
1349 clli->cfg_flags, marker->cm_flags);
1350 if (marker->cm_flags & CM_START) {
1351 /* all previous flags off */
1352 clli->cfg_flags = CFG_F_MARKER;
1353 if (marker->cm_flags & CM_SKIP) {
1354 clli->cfg_flags |= CFG_F_SKIP;
1355 CDEBUG(D_CONFIG, "SKIP #%d\n",
1356 marker->cm_step);
1357 } else if ((marker->cm_flags & CM_EXCLUDE) ||
1358 (clli->cfg_sb &&
1359 lustre_check_exclusion(clli->cfg_sb,
1360 marker->cm_tgtname))) {
1361 clli->cfg_flags |= CFG_F_EXCLUDE;
1362 CDEBUG(D_CONFIG, "EXCLUDE %d\n",
1363 marker->cm_step);
1364 }
1365 } else if (marker->cm_flags & CM_END) {
1366 clli->cfg_flags = 0;
1367 }
1368 }
1369 /* A config command without a start marker before it is
1370 illegal (post 146) */
1371 if (!(clli->cfg_flags & CFG_F_COMPAT146) &&
1372 !(clli->cfg_flags & CFG_F_MARKER) &&
1373 (lcfg->lcfg_command != LCFG_MARKER)) {
1374 CWARN("Config not inside markers, ignoring! "
1375 "(inst: %p, uuid: %s, flags: %#x)\n",
1376 clli->cfg_instance,
1377 clli->cfg_uuid.uuid, clli->cfg_flags);
1378 clli->cfg_flags |= CFG_F_SKIP;
1379 }
1380 if (clli->cfg_flags & CFG_F_SKIP) {
1381 CDEBUG(D_CONFIG, "skipping %#x\n",
1382 clli->cfg_flags);
1383 rc = 0;
1384 /* No processing! */
1385 break;
1386 }
1387
1388 /*
1389 * For interoperability between 1.8 and 2.0,
1390 * rename "mds" obd device type to "mdt".
1391 */
1392 {
1393 char *typename = lustre_cfg_string(lcfg, 1);
1394 char *index = lustre_cfg_string(lcfg, 2);
1395
1396 if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
1397 strcmp(typename, "mds") == 0)) {
1398 CWARN("For 1.8 interoperability, rename obd "
1399 "type from mds to mdt\n");
1400 typename[2] = 't';
1401 }
1402 if ((lcfg->lcfg_command == LCFG_SETUP && index &&
1403 strcmp(index, "type") == 0)) {
1404 CDEBUG(D_INFO, "For 1.8 interoperability, "
1405 "set this index to '0'\n");
1406 index[0] = '0';
1407 index[1] = 0;
1408 }
1409 }
1410
1411
f1b58c5a
NC		 1412 if (clli->cfg_flags & CFG_F_EXCLUDE) {
1413 CDEBUG(D_CONFIG, "cmd: %x marked EXCLUDED\n",
1414 lcfg->lcfg_command);
1415 if (lcfg->lcfg_command == LCFG_LOV_ADD_OBD)
1416 /* Add inactive instead */
1417 lcfg->lcfg_command = LCFG_LOV_ADD_INA;
1418 }
d7e09d03
PT		 1419
1420 lustre_cfg_bufs_init(&bufs, lcfg);
1421
1422 if (clli && clli->cfg_instance &&
1423 LUSTRE_CFG_BUFLEN(lcfg, 0) > 0){
1424 inst = 1;
1425 inst_len = LUSTRE_CFG_BUFLEN(lcfg, 0) +
1426 sizeof(clli->cfg_instance) * 2 + 4;
1427 OBD_ALLOC(inst_name, inst_len);
1428 if (inst_name == NULL)
1429 GOTO(out, rc = -ENOMEM);
1430 sprintf(inst_name, "%s-%p",
1431 lustre_cfg_string(lcfg, 0),
1432 clli->cfg_instance);
1433 lustre_cfg_bufs_set_string(&bufs, 0, inst_name);
1434 CDEBUG(D_CONFIG, "cmd %x, instance name: %s\n",
1435 lcfg->lcfg_command, inst_name);
1436 }
1437
1438 /* we override the llog's uuid for clients, to insure they
1439 are unique */
1440 if (clli && clli->cfg_instance != NULL &&
1441 lcfg->lcfg_command == LCFG_ATTACH) {
1442 lustre_cfg_bufs_set_string(&bufs, 2,
1443 clli->cfg_uuid.uuid);
1444 }
1445 /*
1446 * sptlrpc config record, we expect 2 data segments:
1447 * [0]: fs_name/target_name,
1448 * [1]: rule string
1449 * moving them to index [1] and [2], and insert MGC's
1450 * obdname at index [0].
1451 */
1452 if (clli && clli->cfg_instance == NULL &&
1453 lcfg->lcfg_command == LCFG_SPTLRPC_CONF) {
1454 lustre_cfg_bufs_set(&bufs, 2, bufs.lcfg_buf[1],
1455 bufs.lcfg_buflen[1]);
1456 lustre_cfg_bufs_set(&bufs, 1, bufs.lcfg_buf[0],
1457 bufs.lcfg_buflen[0]);
1458 lustre_cfg_bufs_set_string(&bufs, 0,
1459 clli->cfg_obdname);
1460 }
1461
1462 lcfg_new = lustre_cfg_new(lcfg->lcfg_command, &bufs);
1463
1464 lcfg_new->lcfg_num = lcfg->lcfg_num;
1465 lcfg_new->lcfg_flags = lcfg->lcfg_flags;
1466
1467 /* XXX Hack to try to remain binary compatible with
1468 * pre-newconfig logs */
1469 if (lcfg->lcfg_nal != 0 && /* pre-newconfig log? */
1470 (lcfg->lcfg_nid >> 32) == 0) {
1471 __u32 addr = (__u32)(lcfg->lcfg_nid & 0xffffffff);
1472
1473 lcfg_new->lcfg_nid =
1474 LNET_MKNID(LNET_MKNET(lcfg->lcfg_nal, 0), addr);
1475 CWARN("Converted pre-newconfig NAL %d NID %x to %s\n",
1476 lcfg->lcfg_nal, addr,
1477 libcfs_nid2str(lcfg_new->lcfg_nid));
1478 } else {
1479 lcfg_new->lcfg_nid = lcfg->lcfg_nid;
1480 }
1481
1482 lcfg_new->lcfg_nal = 0; /* illegal value for obsolete field */
1483
1484 rc = class_process_config(lcfg_new);
1485 lustre_cfg_free(lcfg_new);
1486
1487 if (inst)
1488 OBD_FREE(inst_name, inst_len);
1489 break;
1490 }
1491 default:
1492 CERROR("Unknown llog record type %#x encountered\n",
1493 rec->lrh_type);
1494 break;
1495 }
1496out:
1497 if (rc) {
1498 CERROR("%s: cfg command failed: rc = %d\n",
1499 handle->lgh_ctxt->loc_obd->obd_name, rc);
1500 class_config_dump_handler(NULL, handle, rec, data);
1501 }
0a3bdb00 1502 return rc;
d7e09d03
PT		 1503}
1504EXPORT_SYMBOL(class_config_llog_handler);
1505
1506int class_config_parse_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
1507 char *name, struct config_llog_instance *cfg)
1508{
1509 struct llog_process_cat_data cd = {0, 0};
1510 struct llog_handle *llh;
1511 llog_cb_t callback;
1512 int rc;
d7e09d03
PT		 1513
1514 CDEBUG(D_INFO, "looking up llog %s\n", name);
1515 rc = llog_open(env, ctxt, &llh, NULL, name, LLOG_OPEN_EXISTS);
1516 if (rc)
0a3bdb00 1517 return rc;
d7e09d03
PT		 1518
1519 rc = llog_init_handle(env, llh, LLOG_F_IS_PLAIN, NULL);
1520 if (rc)
1521 GOTO(parse_out, rc);
1522
1523 /* continue processing from where we last stopped to end-of-log */
1524 if (cfg) {
1525 cd.lpcd_first_idx = cfg->cfg_last_idx;
1526 callback = cfg->cfg_callback;
1527 LASSERT(callback != NULL);
1528 } else {
1529 callback = class_config_llog_handler;
1530 }
1531
1532 cd.lpcd_last_idx = 0;
1533
1534 rc = llog_process(env, llh, callback, cfg, &cd);
1535
1536 CDEBUG(D_CONFIG, "Processed log %s gen %d-%d (rc=%d)\n", name,
1537 cd.lpcd_first_idx + 1, cd.lpcd_last_idx, rc);
1538 if (cfg)
1539 cfg->cfg_last_idx = cd.lpcd_last_idx;
1540
1541parse_out:
1542 llog_close(env, llh);
0a3bdb00 1543 return rc;
d7e09d03
PT		 1544}
1545EXPORT_SYMBOL(class_config_parse_llog);
1546
1547/**
1548 * parse config record and output dump in supplied buffer.
1549 * This is separated from class_config_dump_handler() to use
1550 * for ioctl needs as well
1551 */
1552int class_config_parse_rec(struct llog_rec_hdr *rec, char *buf, int size)
1553{
1554 struct lustre_cfg *lcfg = (struct lustre_cfg *)(rec + 1);
1555 char *ptr = buf;
1556 char *end = buf + size;
1557 int rc = 0;
1558
d7e09d03
PT		 1559 LASSERT(rec->lrh_type == OBD_CFG_REC);
1560 rc = lustre_cfg_sanity_check(lcfg, rec->lrh_len);
1561 if (rc < 0)
0a3bdb00 1562 return rc;
d7e09d03
PT		 1563
1564 ptr += snprintf(ptr, end-ptr, "cmd=%05x ", lcfg->lcfg_command);
1565 if (lcfg->lcfg_flags)
1566 ptr += snprintf(ptr, end-ptr, "flags=%#08x ",
1567 lcfg->lcfg_flags);
1568
1569 if (lcfg->lcfg_num)
1570 ptr += snprintf(ptr, end-ptr, "num=%#08x ", lcfg->lcfg_num);
1571
1572 if (lcfg->lcfg_nid)
1573 ptr += snprintf(ptr, end-ptr, "nid=%s("LPX64")\n ",
1574 libcfs_nid2str(lcfg->lcfg_nid),
1575 lcfg->lcfg_nid);
1576
1577 if (lcfg->lcfg_command == LCFG_MARKER) {
1578 struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1579
1580 ptr += snprintf(ptr, end-ptr, "marker=%d(%#x)%s '%s'",
1581 marker->cm_step, marker->cm_flags,
1582 marker->cm_tgtname, marker->cm_comment);
1583 } else {
1584 int i;
1585
1586 for (i = 0; i < lcfg->lcfg_bufcount; i++) {
1587 ptr += snprintf(ptr, end-ptr, "%d:%s ", i,
1588 lustre_cfg_string(lcfg, i));
1589 }
1590 }
1591 /* return consumed bytes */
1592 rc = ptr - buf;
0a3bdb00 1593 return rc;
d7e09d03
PT		 1594}
1595
1596int class_config_dump_handler(const struct lu_env *env,
1597 struct llog_handle *handle,
1598 struct llog_rec_hdr *rec, void *data)
1599{
1600 char *outstr;
1601 int rc = 0;
1602
d7e09d03
PT		 1603 OBD_ALLOC(outstr, 256);
1604 if (outstr == NULL)
0a3bdb00 1605 return -ENOMEM;
d7e09d03
PT		 1606
1607 if (rec->lrh_type == OBD_CFG_REC) {
1608 class_config_parse_rec(rec, outstr, 256);
1609 LCONSOLE(D_WARNING, " %s\n", outstr);
1610 } else {
1611 LCONSOLE(D_WARNING, "unhandled lrh_type: %#x\n", rec->lrh_type);
1612 rc = -EINVAL;
1613 }
1614
1615 OBD_FREE(outstr, 256);
0a3bdb00 1616 return rc;
d7e09d03
PT		 1617}
1618
1619int class_config_dump_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
1620 char *name, struct config_llog_instance *cfg)
1621{
1622 struct llog_handle *llh;
1623 int rc;
1624
d7e09d03
PT		 1625 LCONSOLE_INFO("Dumping config log %s\n", name);
1626
1627 rc = llog_open(env, ctxt, &llh, NULL, name, LLOG_OPEN_EXISTS);
1628 if (rc)
0a3bdb00 1629 return rc;
d7e09d03
PT		 1630
1631 rc = llog_init_handle(env, llh, LLOG_F_IS_PLAIN, NULL);
1632 if (rc)
1633 GOTO(parse_out, rc);
1634
1635 rc = llog_process(env, llh, class_config_dump_handler, cfg, NULL);
1636parse_out:
1637 llog_close(env, llh);
1638
1639 LCONSOLE_INFO("End config log %s\n", name);
0a3bdb00 1640 return rc;
d7e09d03
PT		 1641}
1642EXPORT_SYMBOL(class_config_dump_llog);
1643
1644/** Call class_cleanup and class_detach.
1645 * "Manual" only in the sense that we're faking lcfg commands.
1646 */
1647int class_manual_cleanup(struct obd_device *obd)
1648{
1649 char flags[3] = "";
1650 struct lustre_cfg *lcfg;
1651 struct lustre_cfg_bufs bufs;
1652 int rc;
d7e09d03
PT		 1653
1654 if (!obd) {
1655 CERROR("empty cleanup\n");
0a3bdb00 1656 return -EALREADY;
d7e09d03
PT		 1657 }
1658
1659 if (obd->obd_force)
1660 strcat(flags, "F");
1661 if (obd->obd_fail)
1662 strcat(flags, "A");
1663
1664 CDEBUG(D_CONFIG, "Manual cleanup of %s (flags='%s')\n",
1665 obd->obd_name, flags);
1666
1667 lustre_cfg_bufs_reset(&bufs, obd->obd_name);
1668 lustre_cfg_bufs_set_string(&bufs, 1, flags);
1669 lcfg = lustre_cfg_new(LCFG_CLEANUP, &bufs);
1670 if (!lcfg)
0a3bdb00 1671 return -ENOMEM;
d7e09d03
PT		 1672
1673 rc = class_process_config(lcfg);
1674 if (rc) {
1675 CERROR("cleanup failed %d: %s\n", rc, obd->obd_name);
1676 GOTO(out, rc);
1677 }
1678
1679 /* the lcfg is almost the same for both ops */
1680 lcfg->lcfg_command = LCFG_DETACH;
1681 rc = class_process_config(lcfg);
1682 if (rc)
1683 CERROR("detach failed %d: %s\n", rc, obd->obd_name);
1684out:
1685 lustre_cfg_free(lcfg);
0a3bdb00 1686 return rc;
d7e09d03
PT		 1687}
1688EXPORT_SYMBOL(class_manual_cleanup);
1689
1690/*
1691 * uuid<->export lustre hash operations
1692 */
1693
1694static unsigned
1695uuid_hash(cfs_hash_t *hs, const void *key, unsigned mask)
1696{
1697 return cfs_hash_djb2_hash(((struct obd_uuid *)key)->uuid,
1698 sizeof(((struct obd_uuid *)key)->uuid), mask);
1699}
1700
1701static void *
1702uuid_key(struct hlist_node *hnode)
1703{
1704 struct obd_export *exp;
1705
1706 exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1707
1708 return &exp->exp_client_uuid;
1709}
1710
1711/*
1712 * NOTE: It is impossible to find an export that is in failed
1713 * state with this function
1714 */
1715static int
1716uuid_keycmp(const void *key, struct hlist_node *hnode)
1717{
1718 struct obd_export *exp;
1719
1720 LASSERT(key);
1721 exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1722
1723 return obd_uuid_equals(key, &exp->exp_client_uuid) &&
1724 !exp->exp_failed;
1725}
1726
1727static void *
1728uuid_export_object(struct hlist_node *hnode)
1729{
1730 return hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1731}
1732
1733static void
1734uuid_export_get(cfs_hash_t *hs, struct hlist_node *hnode)
1735{
1736 struct obd_export *exp;
1737
1738 exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1739 class_export_get(exp);
1740}
1741
1742static void
1743uuid_export_put_locked(cfs_hash_t *hs, struct hlist_node *hnode)
1744{
1745 struct obd_export *exp;
1746
1747 exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1748 class_export_put(exp);
1749}
1750
1751static cfs_hash_ops_t uuid_hash_ops = {
1752 .hs_hash = uuid_hash,
1753 .hs_key = uuid_key,
1754 .hs_keycmp = uuid_keycmp,
1755 .hs_object = uuid_export_object,
1756 .hs_get = uuid_export_get,
1757 .hs_put_locked = uuid_export_put_locked,
1758};
1759
1760
1761/*
1762 * nid<->export hash operations
1763 */
1764
1765static unsigned
1766nid_hash(cfs_hash_t *hs, const void *key, unsigned mask)
1767{
1768 return cfs_hash_djb2_hash(key, sizeof(lnet_nid_t), mask);
1769}
1770
1771static void *
1772nid_key(struct hlist_node *hnode)
1773{
1774 struct obd_export *exp;
1775
1776 exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1777
0a3bdb00 1778 return &exp->exp_connection->c_peer.nid;
d7e09d03
PT		 1779}
1780
1781/*
1782 * NOTE: It is impossible to find an export that is in failed
1783 * state with this function
1784 */
1785static int
1786nid_kepcmp(const void *key, struct hlist_node *hnode)
1787{
1788 struct obd_export *exp;
1789
1790 LASSERT(key);
1791 exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1792
0a3bdb00
GKH		 1793 return exp->exp_connection->c_peer.nid == *(lnet_nid_t *)key &&
1794 !exp->exp_failed;
d7e09d03
PT		 1795}
1796
1797static void *
1798nid_export_object(struct hlist_node *hnode)
1799{
1800 return hlist_entry(hnode, struct obd_export, exp_nid_hash);
1801}
1802
1803static void
1804nid_export_get(cfs_hash_t *hs, struct hlist_node *hnode)
1805{
1806 struct obd_export *exp;
1807
1808 exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1809 class_export_get(exp);
1810}
1811
1812static void
1813nid_export_put_locked(cfs_hash_t *hs, struct hlist_node *hnode)
1814{
1815 struct obd_export *exp;
1816
1817 exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1818 class_export_put(exp);
1819}
1820
1821static cfs_hash_ops_t nid_hash_ops = {
1822 .hs_hash = nid_hash,
1823 .hs_key = nid_key,
1824 .hs_keycmp = nid_kepcmp,
1825 .hs_object = nid_export_object,
1826 .hs_get = nid_export_get,
1827 .hs_put_locked = nid_export_put_locked,
1828};
1829
1830
1831/*
1832 * nid<->nidstats hash operations
1833 */
1834
1835static void *
1836nidstats_key(struct hlist_node *hnode)
1837{
1838 struct nid_stat *ns;
1839
1840 ns = hlist_entry(hnode, struct nid_stat, nid_hash);
1841
1842 return &ns->nid;
1843}
1844
1845static int
1846nidstats_keycmp(const void *key, struct hlist_node *hnode)
1847{
1848 return *(lnet_nid_t *)nidstats_key(hnode) == *(lnet_nid_t *)key;
1849}
1850
1851static void *
1852nidstats_object(struct hlist_node *hnode)
1853{
1854 return hlist_entry(hnode, struct nid_stat, nid_hash);
1855}
1856
1857static void
1858nidstats_get(cfs_hash_t *hs, struct hlist_node *hnode)
1859{
1860 struct nid_stat *ns;
1861
1862 ns = hlist_entry(hnode, struct nid_stat, nid_hash);
1863 nidstat_getref(ns);
1864}
1865
1866static void
1867nidstats_put_locked(cfs_hash_t *hs, struct hlist_node *hnode)
1868{
1869 struct nid_stat *ns;
1870
1871 ns = hlist_entry(hnode, struct nid_stat, nid_hash);
1872 nidstat_putref(ns);
1873}
1874
1875static cfs_hash_ops_t nid_stat_hash_ops = {
1876 .hs_hash = nid_hash,
1877 .hs_key = nidstats_key,
1878 .hs_keycmp = nidstats_keycmp,
1879 .hs_object = nidstats_object,
1880 .hs_get = nidstats_get,
1881 .hs_put_locked = nidstats_put_locked,
1882};
Linux kernel - Deliverables
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