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Staging: lustre: libcfs: libcfs_mem.c: Remove explicit NULL comparison
[deliverable/linux.git] / drivers / staging / lustre / lustre / obdclass / obd_config.c
CommitLineData
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
610f7377 42#include "../include/obd_class.h"
d7e09d03 43#include <linux/string.h>
610f7377
GKH		 44#include "../include/lustre_log.h"
45#include "../include/lprocfs_status.h"
46#include "../include/lustre_param.h"
d7e09d03
PT		 47
48#include "llog_internal.h"
49
50static cfs_hash_ops_t uuid_hash_ops;
51static cfs_hash_ops_t nid_hash_ops;
d7e09d03
PT		 52
53/*********** string parsing utils *********/
54
55/* returns 0 if we find this key in the buffer, else 1 */
56int class_find_param(char *buf, char *key, char **valp)
57{
58 char *ptr;
59
60 if (!buf)
61 return 1;
62
4a87df3e
CP		 63 ptr = strstr(buf, key);
64 if (ptr == NULL)
d7e09d03
PT		 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);
d212afd9 367 goto out;
d7e09d03
PT		 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);
d7e09d03
PT		 385 spin_lock_init(&obd->obd_nid_lock);
386 spin_lock_init(&obd->obd_dev_lock);
387 mutex_init(&obd->obd_dev_mutex);
388 spin_lock_init(&obd->obd_osfs_lock);
389 /* obd->obd_osfs_age must be set to a value in the distant
390 * past to guarantee a fresh statfs is fetched on mount. */
391 obd->obd_osfs_age = cfs_time_shift_64(-1000);
392
393 /* XXX belongs in setup not attach */
394 init_rwsem(&obd->obd_observer_link_sem);
395 /* recovery data */
396 cfs_init_timer(&obd->obd_recovery_timer);
397 spin_lock_init(&obd->obd_recovery_task_lock);
398 init_waitqueue_head(&obd->obd_next_transno_waitq);
399 init_waitqueue_head(&obd->obd_evict_inprogress_waitq);
400 INIT_LIST_HEAD(&obd->obd_req_replay_queue);
401 INIT_LIST_HEAD(&obd->obd_lock_replay_queue);
402 INIT_LIST_HEAD(&obd->obd_final_req_queue);
403 INIT_LIST_HEAD(&obd->obd_evict_list);
404
405 llog_group_init(&obd->obd_olg, FID_SEQ_LLOG);
406
407 obd->obd_conn_inprogress = 0;
408
409 len = strlen(uuid);
410 if (len >= sizeof(obd->obd_uuid)) {
411 CERROR("uuid must be < %d bytes long\n",
412 (int)sizeof(obd->obd_uuid));
d212afd9
JL		 413 rc = -EINVAL;
414 goto out;
d7e09d03
PT		 415 }
416 memcpy(obd->obd_uuid.uuid, uuid, len);
417
418 /* do the attach */
419 if (OBP(obd, attach)) {
ec83e611 420 rc = OBP(obd, attach)(obd, sizeof(*lcfg), lcfg);
d212afd9
JL		 421 if (rc) {
422 rc = -EINVAL;
423 goto out;
424 }
d7e09d03
PT		 425 }
426
427 /* Detach drops this */
428 spin_lock(&obd->obd_dev_lock);
429 atomic_set(&obd->obd_refcount, 1);
430 spin_unlock(&obd->obd_dev_lock);
431 lu_ref_init(&obd->obd_reference);
432 lu_ref_add(&obd->obd_reference, "attach", obd);
433
434 obd->obd_attached = 1;
435 CDEBUG(D_IOCTL, "OBD: dev %d attached type %s with refcount %d\n",
436 obd->obd_minor, typename, atomic_read(&obd->obd_refcount));
0a3bdb00 437 return 0;
d7e09d03
PT		 438 out:
439 if (obd != NULL) {
440 class_release_dev(obd);
441 }
442 return rc;
443}
444EXPORT_SYMBOL(class_attach);
445
446/** Create hashes, self-export, and call type-specific setup.
447 * Setup is effectively the "start this obd" call.
448 */
449int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
450{
451 int err = 0;
452 struct obd_export *exp;
d7e09d03
PT		 453
454 LASSERT(obd != NULL);
455 LASSERTF(obd == class_num2obd(obd->obd_minor),
456 "obd %p != obd_devs[%d] %p\n",
457 obd, obd->obd_minor, class_num2obd(obd->obd_minor));
458 LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
459 "obd %p obd_magic %08x != %08x\n",
460 obd, obd->obd_magic, OBD_DEVICE_MAGIC);
461
462 /* have we attached a type to this device? */
463 if (!obd->obd_attached) {
464 CERROR("Device %d not attached\n", obd->obd_minor);
0a3bdb00 465 return -ENODEV;
d7e09d03
PT		 466 }
467
468 if (obd->obd_set_up) {
469 CERROR("Device %d already setup (type %s)\n",
470 obd->obd_minor, obd->obd_type->typ_name);
0a3bdb00 471 return -EEXIST;
d7e09d03
PT		 472 }
473
474 /* is someone else setting us up right now? (attach inits spinlock) */
475 spin_lock(&obd->obd_dev_lock);
476 if (obd->obd_starting) {
477 spin_unlock(&obd->obd_dev_lock);
478 CERROR("Device %d setup in progress (type %s)\n",
479 obd->obd_minor, obd->obd_type->typ_name);
0a3bdb00 480 return -EEXIST;
d7e09d03
PT		 481 }
482 /* just leave this on forever. I can't use obd_set_up here because
483 other fns check that status, and we're not actually set up yet. */
484 obd->obd_starting = 1;
485 obd->obd_uuid_hash = NULL;
486 obd->obd_nid_hash = NULL;
d7e09d03
PT		 487 spin_unlock(&obd->obd_dev_lock);
488
489 /* create an uuid-export lustre hash */
490 obd->obd_uuid_hash = cfs_hash_create("UUID_HASH",
491 HASH_UUID_CUR_BITS,
492 HASH_UUID_MAX_BITS,
493 HASH_UUID_BKT_BITS, 0,
494 CFS_HASH_MIN_THETA,
495 CFS_HASH_MAX_THETA,
496 &uuid_hash_ops, CFS_HASH_DEFAULT);
d212afd9
JL		 497 if (!obd->obd_uuid_hash) {
498 err = -ENOMEM;
499 goto err_hash;
500 }
d7e09d03
PT		 501
502 /* create a nid-export lustre hash */
503 obd->obd_nid_hash = cfs_hash_create("NID_HASH",
504 HASH_NID_CUR_BITS,
505 HASH_NID_MAX_BITS,
506 HASH_NID_BKT_BITS, 0,
507 CFS_HASH_MIN_THETA,
508 CFS_HASH_MAX_THETA,
509 &nid_hash_ops, CFS_HASH_DEFAULT);
d212afd9
JL		 510 if (!obd->obd_nid_hash) {
511 err = -ENOMEM;
512 goto err_hash;
513 }
d7e09d03 514
d7e09d03 515 exp = class_new_export(obd, &obd->obd_uuid);
d212afd9
JL		 516 if (IS_ERR(exp)) {
517 err = PTR_ERR(exp);
518 goto err_hash;
519 }
d7e09d03
PT		 520
521 obd->obd_self_export = exp;
522 list_del_init(&exp->exp_obd_chain_timed);
523 class_export_put(exp);
524
525 err = obd_setup(obd, lcfg);
526 if (err)
d212afd9 527 goto err_exp;
d7e09d03
PT		 528
529 obd->obd_set_up = 1;
530
531 spin_lock(&obd->obd_dev_lock);
532 /* cleanup drops this */
533 class_incref(obd, "setup", obd);
534 spin_unlock(&obd->obd_dev_lock);
535
536 CDEBUG(D_IOCTL, "finished setup of obd %s (uuid %s)\n",
537 obd->obd_name, obd->obd_uuid.uuid);
538
0a3bdb00 539 return 0;
d7e09d03
PT		 540err_exp:
541 if (obd->obd_self_export) {
542 class_unlink_export(obd->obd_self_export);
543 obd->obd_self_export = NULL;
544 }
545err_hash:
546 if (obd->obd_uuid_hash) {
547 cfs_hash_putref(obd->obd_uuid_hash);
548 obd->obd_uuid_hash = NULL;
549 }
550 if (obd->obd_nid_hash) {
551 cfs_hash_putref(obd->obd_nid_hash);
552 obd->obd_nid_hash = NULL;
553 }
d7e09d03
PT		 554 obd->obd_starting = 0;
555 CERROR("setup %s failed (%d)\n", obd->obd_name, err);
556 return err;
557}
558EXPORT_SYMBOL(class_setup);
559
560/** We have finished using this obd and are ready to destroy it.
561 * There can be no more references to this obd.
562 */
563int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg)
564{
d7e09d03
PT		 565 if (obd->obd_set_up) {
566 CERROR("OBD device %d still set up\n", obd->obd_minor);
0a3bdb00 567 return -EBUSY;
d7e09d03
PT		 568 }
569
570 spin_lock(&obd->obd_dev_lock);
571 if (!obd->obd_attached) {
572 spin_unlock(&obd->obd_dev_lock);
573 CERROR("OBD device %d not attached\n", obd->obd_minor);
0a3bdb00 574 return -ENODEV;
d7e09d03
PT		 575 }
576 obd->obd_attached = 0;
577 spin_unlock(&obd->obd_dev_lock);
578
579 CDEBUG(D_IOCTL, "detach on obd %s (uuid %s)\n",
580 obd->obd_name, obd->obd_uuid.uuid);
581
582 class_decref(obd, "attach", obd);
0a3bdb00 583 return 0;
d7e09d03
PT		 584}
585EXPORT_SYMBOL(class_detach);
586
52cf6acf 587/** Start shutting down the obd. There may be in-progress ops when
d7e09d03
PT		 588 * this is called. We tell them to start shutting down with a call
589 * to class_disconnect_exports().
590 */
591int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg)
592{
593 int err = 0;
594 char *flag;
d7e09d03
PT		 595
596 OBD_RACE(OBD_FAIL_LDLM_RECOV_CLIENTS);
597
598 if (!obd->obd_set_up) {
599 CERROR("Device %d not setup\n", obd->obd_minor);
0a3bdb00 600 return -ENODEV;
d7e09d03
PT		 601 }
602
603 spin_lock(&obd->obd_dev_lock);
604 if (obd->obd_stopping) {
605 spin_unlock(&obd->obd_dev_lock);
606 CERROR("OBD %d already stopping\n", obd->obd_minor);
0a3bdb00 607 return -ENODEV;
d7e09d03
PT		 608 }
609 /* Leave this on forever */
610 obd->obd_stopping = 1;
611
612 /* wait for already-arrived-connections to finish. */
613 while (obd->obd_conn_inprogress > 0) {
614 spin_unlock(&obd->obd_dev_lock);
615
616 cond_resched();
617
618 spin_lock(&obd->obd_dev_lock);
619 }
620 spin_unlock(&obd->obd_dev_lock);
621
622 if (lcfg->lcfg_bufcount >= 2 && LUSTRE_CFG_BUFLEN(lcfg, 1) > 0) {
623 for (flag = lustre_cfg_string(lcfg, 1); *flag != 0; flag++)
624 switch (*flag) {
625 case 'F':
626 obd->obd_force = 1;
627 break;
628 case 'A':
629 LCONSOLE_WARN("Failing over %s\n",
630 obd->obd_name);
631 obd->obd_fail = 1;
632 obd->obd_no_transno = 1;
633 obd->obd_no_recov = 1;
634 if (OBP(obd, iocontrol)) {
635 obd_iocontrol(OBD_IOC_SYNC,
636 obd->obd_self_export,
637 0, NULL, NULL);
638 }
639 break;
640 default:
641 CERROR("Unrecognised flag '%c'\n", *flag);
642 }
643 }
644
645 LASSERT(obd->obd_self_export);
646
647 /* The three references that should be remaining are the
648 * obd_self_export and the attach and setup references. */
649 if (atomic_read(&obd->obd_refcount) > 3) {
52cf6acf 650 /* refcount - 3 might be the number of real exports
d7e09d03
PT		 651 (excluding self export). But class_incref is called
652 by other things as well, so don't count on it. */
653 CDEBUG(D_IOCTL, "%s: forcing exports to disconnect: %d\n",
654 obd->obd_name, atomic_read(&obd->obd_refcount) - 3);
655 dump_exports(obd, 0);
656 class_disconnect_exports(obd);
657 }
658
659 /* Precleanup, we must make sure all exports get destroyed. */
660 err = obd_precleanup(obd, OBD_CLEANUP_EXPORTS);
661 if (err)
662 CERROR("Precleanup %s returned %d\n",
663 obd->obd_name, err);
664
665 /* destroy an uuid-export hash body */
666 if (obd->obd_uuid_hash) {
667 cfs_hash_putref(obd->obd_uuid_hash);
668 obd->obd_uuid_hash = NULL;
669 }
670
671 /* destroy a nid-export hash body */
672 if (obd->obd_nid_hash) {
673 cfs_hash_putref(obd->obd_nid_hash);
674 obd->obd_nid_hash = NULL;
675 }
676
d7e09d03
PT		 677 class_decref(obd, "setup", obd);
678 obd->obd_set_up = 0;
679
0a3bdb00 680 return 0;
d7e09d03
PT		 681}
682EXPORT_SYMBOL(class_cleanup);
683
684struct obd_device *class_incref(struct obd_device *obd,
685 const char *scope, const void *source)
686{
687 lu_ref_add_atomic(&obd->obd_reference, scope, source);
688 atomic_inc(&obd->obd_refcount);
689 CDEBUG(D_INFO, "incref %s (%p) now %d\n", obd->obd_name, obd,
690 atomic_read(&obd->obd_refcount));
691
692 return obd;
693}
694EXPORT_SYMBOL(class_incref);
695
696void class_decref(struct obd_device *obd, const char *scope, const void *source)
697{
698 int err;
699 int refs;
700
701 spin_lock(&obd->obd_dev_lock);
702 atomic_dec(&obd->obd_refcount);
703 refs = atomic_read(&obd->obd_refcount);
704 spin_unlock(&obd->obd_dev_lock);
705 lu_ref_del(&obd->obd_reference, scope, source);
706
707 CDEBUG(D_INFO, "Decref %s (%p) now %d\n", obd->obd_name, obd, refs);
708
709 if ((refs == 1) && obd->obd_stopping) {
710 /* All exports have been destroyed; there should
711 be no more in-progress ops by this point.*/
712
713 spin_lock(&obd->obd_self_export->exp_lock);
714 obd->obd_self_export->exp_flags |= exp_flags_from_obd(obd);
715 spin_unlock(&obd->obd_self_export->exp_lock);
716
717 /* note that we'll recurse into class_decref again */
718 class_unlink_export(obd->obd_self_export);
719 return;
720 }
721
722 if (refs == 0) {
723 CDEBUG(D_CONFIG, "finishing cleanup of obd %s (%s)\n",
724 obd->obd_name, obd->obd_uuid.uuid);
725 LASSERT(!obd->obd_attached);
726 if (obd->obd_stopping) {
727 /* If we're not stopping, we were never set up */
728 err = obd_cleanup(obd);
729 if (err)
730 CERROR("Cleanup %s returned %d\n",
731 obd->obd_name, err);
732 }
733 if (OBP(obd, detach)) {
734 err = OBP(obd, detach)(obd);
735 if (err)
736 CERROR("Detach returned %d\n", err);
737 }
738 class_release_dev(obd);
739 }
740}
741EXPORT_SYMBOL(class_decref);
742
743/** Add a failover nid location.
744 * Client obd types contact server obd types using this nid list.
745 */
746int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
747{
748 struct obd_import *imp;
749 struct obd_uuid uuid;
750 int rc;
d7e09d03
PT		 751
752 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
753 LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
754 CERROR("invalid conn_uuid\n");
0a3bdb00 755 return -EINVAL;
d7e09d03
PT		 756 }
757 if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
758 strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) &&
759 strcmp(obd->obd_type->typ_name, LUSTRE_OSP_NAME) &&
760 strcmp(obd->obd_type->typ_name, LUSTRE_LWP_NAME) &&
761 strcmp(obd->obd_type->typ_name, LUSTRE_MGC_NAME)) {
762 CERROR("can't add connection on non-client dev\n");
0a3bdb00 763 return -EINVAL;
d7e09d03
PT		 764 }
765
766 imp = obd->u.cli.cl_import;
767 if (!imp) {
768 CERROR("try to add conn on immature client dev\n");
0a3bdb00 769 return -EINVAL;
d7e09d03
PT		 770 }
771
772 obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
773 rc = obd_add_conn(imp, &uuid, lcfg->lcfg_num);
774
0a3bdb00 775 return rc;
d7e09d03
PT		 776}
777EXPORT_SYMBOL(class_add_conn);
778
779/** Remove a failover nid location.
780 */
781int class_del_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
782{
783 struct obd_import *imp;
784 struct obd_uuid uuid;
785 int rc;
d7e09d03
PT		 786
787 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
788 LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
789 CERROR("invalid conn_uuid\n");
0a3bdb00 790 return -EINVAL;
d7e09d03
PT		 791 }
792 if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
793 strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME)) {
794 CERROR("can't del connection on non-client dev\n");
0a3bdb00 795 return -EINVAL;
d7e09d03
PT		 796 }
797
798 imp = obd->u.cli.cl_import;
799 if (!imp) {
800 CERROR("try to del conn on immature client dev\n");
0a3bdb00 801 return -EINVAL;
d7e09d03
PT		 802 }
803
804 obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
805 rc = obd_del_conn(imp, &uuid);
806
0a3bdb00 807 return rc;
d7e09d03
PT		 808}
809
810LIST_HEAD(lustre_profile_list);
811
54442610 812struct lustre_profile *class_get_profile(const char *prof)
d7e09d03
PT		 813{
814 struct lustre_profile *lprof;
815
d7e09d03
PT		 816 list_for_each_entry(lprof, &lustre_profile_list, lp_list) {
817 if (!strcmp(lprof->lp_profile, prof)) {
0a3bdb00 818 return lprof;
d7e09d03
PT		 819 }
820 }
0a3bdb00 821 return NULL;
d7e09d03
PT		 822}
823EXPORT_SYMBOL(class_get_profile);
824
825/** Create a named "profile".
826 * This defines the mdc and osc names to use for a client.
827 * This also is used to define the lov to be used by a mdt.
828 */
829int class_add_profile(int proflen, char *prof, int osclen, char *osc,
830 int mdclen, char *mdc)
831{
832 struct lustre_profile *lprof;
833 int err = 0;
d7e09d03
PT		 834
835 CDEBUG(D_CONFIG, "Add profile %s\n", prof);
836
d7279044 837 lprof = kzalloc(sizeof(*lprof), GFP_NOFS);
485640b5 838 if (!lprof)
0a3bdb00 839 return -ENOMEM;
d7e09d03
PT		 840 INIT_LIST_HEAD(&lprof->lp_list);
841
842 LASSERT(proflen == (strlen(prof) + 1));
d5be8e1d 843 lprof->lp_profile = kmemdup(prof, proflen, GFP_NOFS);
d212afd9
JL		 844 if (lprof->lp_profile == NULL) {
845 err = -ENOMEM;
32a3fab2 846 goto free_lprof;
d212afd9 847 }
d7e09d03
PT		 848
849 LASSERT(osclen == (strlen(osc) + 1));
d5be8e1d 850 lprof->lp_dt = kmemdup(osc, osclen, GFP_NOFS);
d212afd9
JL		 851 if (lprof->lp_dt == NULL) {
852 err = -ENOMEM;
32a3fab2 853 goto free_lp_profile;
d212afd9 854 }
d7e09d03
PT		 855
856 if (mdclen > 0) {
857 LASSERT(mdclen == (strlen(mdc) + 1));
d5be8e1d 858 lprof->lp_md = kmemdup(mdc, mdclen, GFP_NOFS);
d212afd9
JL		 859 if (lprof->lp_md == NULL) {
860 err = -ENOMEM;
32a3fab2 861 goto free_lp_dt;
d212afd9 862 }
d7e09d03
PT		 863 }
864
865 list_add(&lprof->lp_list, &lustre_profile_list);
0a3bdb00 866 return err;
d7e09d03 867
32a3fab2
JL		 868free_lp_dt:
869 kfree(lprof->lp_dt);
870free_lp_profile:
871 kfree(lprof->lp_profile);
872free_lprof:
d7279044 873 kfree(lprof);
0a3bdb00 874 return err;
d7e09d03
PT		 875}
876
877void class_del_profile(const char *prof)
878{
879 struct lustre_profile *lprof;
d7e09d03
PT		 880
881 CDEBUG(D_CONFIG, "Del profile %s\n", prof);
882
883 lprof = class_get_profile(prof);
884 if (lprof) {
885 list_del(&lprof->lp_list);
d7279044
JL		 886 kfree(lprof->lp_profile);
887 kfree(lprof->lp_dt);
32a3fab2 888 kfree(lprof->lp_md);
d7279044 889 kfree(lprof);
d7e09d03 890 }
d7e09d03
PT		 891}
892EXPORT_SYMBOL(class_del_profile);
893
894/* COMPAT_146 */
895void class_del_profiles(void)
896{
897 struct lustre_profile *lprof, *n;
d7e09d03
PT		 898
899 list_for_each_entry_safe(lprof, n, &lustre_profile_list, lp_list) {
900 list_del(&lprof->lp_list);
d7279044
JL		 901 kfree(lprof->lp_profile);
902 kfree(lprof->lp_dt);
32a3fab2 903 kfree(lprof->lp_md);
d7279044 904 kfree(lprof);
d7e09d03 905 }
d7e09d03
PT		 906}
907EXPORT_SYMBOL(class_del_profiles);
908
909static int class_set_global(char *ptr, int val, struct lustre_cfg *lcfg)
910{
d7e09d03
PT		 911 if (class_match_param(ptr, PARAM_AT_MIN, NULL) == 0)
912 at_min = val;
913 else if (class_match_param(ptr, PARAM_AT_MAX, NULL) == 0)
914 at_max = val;
915 else if (class_match_param(ptr, PARAM_AT_EXTRA, NULL) == 0)
916 at_extra = val;
917 else if (class_match_param(ptr, PARAM_AT_EARLY_MARGIN, NULL) == 0)
918 at_early_margin = val;
919 else if (class_match_param(ptr, PARAM_AT_HISTORY, NULL) == 0)
920 at_history = val;
921 else if (class_match_param(ptr, PARAM_JOBID_VAR, NULL) == 0)
922 strlcpy(obd_jobid_var, lustre_cfg_string(lcfg, 2),
923 JOBSTATS_JOBID_VAR_MAX_LEN + 1);
924 else
0a3bdb00 925 return -EINVAL;
d7e09d03
PT		 926
927 CDEBUG(D_IOCTL, "global %s = %d\n", ptr, val);
0a3bdb00 928 return 0;
d7e09d03
PT		 929}
930
931
932/* We can't call ll_process_config or lquota_process_config directly because
933 * it lives in a module that must be loaded after this one. */
ea28d21a
MR		 934static int (*client_process_config)(struct lustre_cfg *lcfg);
935static int (*quota_process_config)(struct lustre_cfg *lcfg);
d7e09d03
PT		 936
937void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg))
938{
939 client_process_config = cpc;
940}
941EXPORT_SYMBOL(lustre_register_client_process_config);
942
943/**
944 * Rename the proc parameter in \a cfg with a new name \a new_name.
945 *
946 * \param cfg config structure which contains the proc parameter
947 * \param new_name new name of the proc parameter
948 *
949 * \retval valid-pointer pointer to the newly-allocated config structure
950 * which contains the renamed proc parameter
951 * \retval ERR_PTR(-EINVAL) if \a cfg or \a new_name is NULL, or \a cfg does
952 * not contain a proc parameter
953 * \retval ERR_PTR(-ENOMEM) if memory allocation failure occurs
954 */
955struct lustre_cfg *lustre_cfg_rename(struct lustre_cfg *cfg,
956 const char *new_name)
957{
958 struct lustre_cfg_bufs *bufs = NULL;
959 struct lustre_cfg *new_cfg = NULL;
960 char *param = NULL;
961 char *new_param = NULL;
962 char *value = NULL;
963 int name_len = 0;
964 int new_len = 0;
d7e09d03
PT		 965
966 if (cfg == NULL || new_name == NULL)
0a3bdb00 967 return ERR_PTR(-EINVAL);
d7e09d03
PT		 968
969 param = lustre_cfg_string(cfg, 1);
970 if (param == NULL)
0a3bdb00 971 return ERR_PTR(-EINVAL);
d7e09d03
PT		 972
973 value = strchr(param, '=');
974 if (value == NULL)
975 name_len = strlen(param);
976 else
977 name_len = value - param;
978
979 new_len = LUSTRE_CFG_BUFLEN(cfg, 1) + strlen(new_name) - name_len;
980
d7279044 981 new_param = kzalloc(new_len, GFP_NOFS);
485640b5 982 if (!new_param)
0a3bdb00 983 return ERR_PTR(-ENOMEM);
d7e09d03
PT		 984
985 strcpy(new_param, new_name);
986 if (value != NULL)
987 strcat(new_param, value);
988
d7279044 989 bufs = kzalloc(sizeof(*bufs), GFP_NOFS);
485640b5 990 if (!bufs) {
d7279044 991 kfree(new_param);
0a3bdb00 992 return ERR_PTR(-ENOMEM);
d7e09d03
PT		 993 }
994
995 lustre_cfg_bufs_reset(bufs, NULL);
996 lustre_cfg_bufs_init(bufs, cfg);
997 lustre_cfg_bufs_set_string(bufs, 1, new_param);
998
999 new_cfg = lustre_cfg_new(cfg->lcfg_command, bufs);
1000
d7279044
JL		 1001 kfree(new_param);
1002 kfree(bufs);
d7e09d03 1003 if (new_cfg == NULL)
0a3bdb00 1004 return ERR_PTR(-ENOMEM);
d7e09d03
PT		 1005
1006 new_cfg->lcfg_num = cfg->lcfg_num;
1007 new_cfg->lcfg_flags = cfg->lcfg_flags;
1008 new_cfg->lcfg_nid = cfg->lcfg_nid;
1009 new_cfg->lcfg_nal = cfg->lcfg_nal;
1010
0a3bdb00 1011 return new_cfg;
d7e09d03
PT		 1012}
1013EXPORT_SYMBOL(lustre_cfg_rename);
1014
7d4bae45
AB		 1015static int process_param2_config(struct lustre_cfg *lcfg)
1016{
1017 char *param = lustre_cfg_string(lcfg, 1);
1018 char *upcall = lustre_cfg_string(lcfg, 2);
1019 char *argv[] = {
1020 [0] = "/usr/sbin/lctl",
1021 [1] = "set_param",
1022 [2] = param,
1023 [3] = NULL
1024 };
1025 struct timeval start;
1026 struct timeval end;
1027 int rc;
1028
1029
1030 /* Add upcall processing here. Now only lctl is supported */
1031 if (strcmp(upcall, LCTL_UPCALL) != 0) {
1032 CERROR("Unsupported upcall %s\n", upcall);
1033 return -EINVAL;
1034 }
1035
1036 do_gettimeofday(&start);
46ffc934 1037 rc = call_usermodehelper(argv[0], argv, NULL, 1);
7d4bae45
AB		 1038 do_gettimeofday(&end);
1039
1040 if (rc < 0) {
1041 CERROR(
1042 "lctl: error invoking upcall %s %s %s: rc = %d; time %ldus\n",
1043 argv[0], argv[1], argv[2], rc,
1044 cfs_timeval_sub(&end, &start, NULL));
1045 } else {
1046 CDEBUG(D_HA, "lctl: invoked upcall %s %s %s, time %ldus\n",
1047 argv[0], argv[1], argv[2],
1048 cfs_timeval_sub(&end, &start, NULL));
1049 rc = 0;
1050 }
1051
1052 return rc;
1053}
1054
d7e09d03
PT		 1055void lustre_register_quota_process_config(int (*qpc)(struct lustre_cfg *lcfg))
1056{
1057 quota_process_config = qpc;
1058}
1059EXPORT_SYMBOL(lustre_register_quota_process_config);
1060
1061/** Process configuration commands given in lustre_cfg form.
1062 * These may come from direct calls (e.g. class_manual_cleanup)
1063 * or processing the config llog, or ioctl from lctl.
1064 */
1065int class_process_config(struct lustre_cfg *lcfg)
1066{
1067 struct obd_device *obd;
1068 int err;
1069
1070 LASSERT(lcfg && !IS_ERR(lcfg));
1071 CDEBUG(D_IOCTL, "processing cmd: %x\n", lcfg->lcfg_command);
1072
1073 /* Commands that don't need a device */
a58a38ac 1074 switch (lcfg->lcfg_command) {
d7e09d03
PT		 1075 case LCFG_ATTACH: {
1076 err = class_attach(lcfg);
d212afd9 1077 goto out;
d7e09d03
PT		 1078 }
1079 case LCFG_ADD_UUID: {
55f5a824
GKH		 1080 CDEBUG(D_IOCTL, "adding mapping from uuid %s to nid %#llx (%s)\n",
1081 lustre_cfg_string(lcfg, 1), lcfg->lcfg_nid,
1082 libcfs_nid2str(lcfg->lcfg_nid));
d7e09d03
PT		 1083
1084 err = class_add_uuid(lustre_cfg_string(lcfg, 1), lcfg->lcfg_nid);
d212afd9 1085 goto out;
d7e09d03
PT		 1086 }
1087 case LCFG_DEL_UUID: {
1088 CDEBUG(D_IOCTL, "removing mappings for uuid %s\n",
1089 (lcfg->lcfg_bufcount < 2 || LUSTRE_CFG_BUFLEN(lcfg, 1) == 0)
1090 ? "<all uuids>" : lustre_cfg_string(lcfg, 1));
1091
1092 err = class_del_uuid(lustre_cfg_string(lcfg, 1));
d212afd9 1093 goto out;
d7e09d03
PT		 1094 }
1095 case LCFG_MOUNTOPT: {
1096 CDEBUG(D_IOCTL, "mountopt: profile %s osc %s mdc %s\n",
1097 lustre_cfg_string(lcfg, 1),
1098 lustre_cfg_string(lcfg, 2),
1099 lustre_cfg_string(lcfg, 3));
1100 /* set these mount options somewhere, so ll_fill_super
1101 * can find them. */
1102 err = class_add_profile(LUSTRE_CFG_BUFLEN(lcfg, 1),
1103 lustre_cfg_string(lcfg, 1),
1104 LUSTRE_CFG_BUFLEN(lcfg, 2),
1105 lustre_cfg_string(lcfg, 2),
1106 LUSTRE_CFG_BUFLEN(lcfg, 3),
1107 lustre_cfg_string(lcfg, 3));
d212afd9 1108 goto out;
d7e09d03
PT		 1109 }
1110 case LCFG_DEL_MOUNTOPT: {
1111 CDEBUG(D_IOCTL, "mountopt: profile %s\n",
1112 lustre_cfg_string(lcfg, 1));
1113 class_del_profile(lustre_cfg_string(lcfg, 1));
d212afd9
JL		 1114 err = 0;
1115 goto out;
d7e09d03
PT		 1116 }
1117 case LCFG_SET_TIMEOUT: {
1118 CDEBUG(D_IOCTL, "changing lustre timeout from %d to %d\n",
1119 obd_timeout, lcfg->lcfg_num);
1120 obd_timeout = max(lcfg->lcfg_num, 1U);
1121 obd_timeout_set = 1;
d212afd9
JL		 1122 err = 0;
1123 goto out;
d7e09d03
PT		 1124 }
1125 case LCFG_SET_LDLM_TIMEOUT: {
082a3344 1126 /* ldlm_timeout is not used on the client */
d212afd9
JL		 1127 err = 0;
1128 goto out;
d7e09d03
PT		 1129 }
1130 case LCFG_SET_UPCALL: {
1131 LCONSOLE_ERROR_MSG(0x15a, "recovery upcall is deprecated\n");
1132 /* COMPAT_146 Don't fail on old configs */
d212afd9
JL		 1133 err = 0;
1134 goto out;
d7e09d03
PT		 1135 }
1136 case LCFG_MARKER: {
1137 struct cfg_marker *marker;
1138 marker = lustre_cfg_buf(lcfg, 1);
1139 CDEBUG(D_IOCTL, "marker %d (%#x) %.16s %s\n", marker->cm_step,
1140 marker->cm_flags, marker->cm_tgtname, marker->cm_comment);
d212afd9
JL		 1141 err = 0;
1142 goto out;
d7e09d03
PT		 1143 }
1144 case LCFG_PARAM: {
1145 char *tmp;
1146 /* llite has no obd */
1147 if ((class_match_param(lustre_cfg_string(lcfg, 1),
ea7893bb 1148 PARAM_LLITE, NULL) == 0) &&
d7e09d03
PT		 1149 client_process_config) {
1150 err = (*client_process_config)(lcfg);
d212afd9 1151 goto out;
d7e09d03
PT		 1152 } else if ((class_match_param(lustre_cfg_string(lcfg, 1),
1153 PARAM_SYS, &tmp) == 0)) {
1154 /* Global param settings */
1155 err = class_set_global(tmp, lcfg->lcfg_num, lcfg);
1156 /*
1157 * Client or server should not fail to mount if
1158 * it hits an unknown configuration parameter.
1159 */
1160 if (err != 0)
1161 CWARN("Ignoring unknown param %s\n", tmp);
1162
d212afd9
JL		 1163 err = 0;
1164 goto out;
d7e09d03
PT		 1165 } else if ((class_match_param(lustre_cfg_string(lcfg, 1),
1166 PARAM_QUOTA, &tmp) == 0) &&
1167 quota_process_config) {
1168 err = (*quota_process_config)(lcfg);
d212afd9 1169 goto out;
d7e09d03 1170 }
7d4bae45 1171
d7e09d03
PT		 1172 break;
1173 }
7d4bae45
AB		 1174 case LCFG_SET_PARAM: {
1175 err = process_param2_config(lcfg);
d212afd9 1176 goto out;
7d4bae45 1177 }
d7e09d03 1178 }
d7e09d03
PT		 1179 /* Commands that require a device */
1180 obd = class_name2obd(lustre_cfg_string(lcfg, 0));
1181 if (obd == NULL) {
1182 if (!LUSTRE_CFG_BUFLEN(lcfg, 0))
1183 CERROR("this lcfg command requires a device name\n");
1184 else
1185 CERROR("no device for: %s\n",
1186 lustre_cfg_string(lcfg, 0));
1187
d212afd9
JL		 1188 err = -EINVAL;
1189 goto out;
d7e09d03
PT		 1190 }
1191
a58a38ac 1192 switch (lcfg->lcfg_command) {
d7e09d03
PT		 1193 case LCFG_SETUP: {
1194 err = class_setup(obd, lcfg);
d212afd9 1195 goto out;
d7e09d03
PT		 1196 }
1197 case LCFG_DETACH: {
1198 err = class_detach(obd, lcfg);
d212afd9
JL		 1199 err = 0;
1200 goto out;
d7e09d03
PT		 1201 }
1202 case LCFG_CLEANUP: {
1203 err = class_cleanup(obd, lcfg);
d212afd9
JL		 1204 err = 0;
1205 goto out;
d7e09d03
PT		 1206 }
1207 case LCFG_ADD_CONN: {
1208 err = class_add_conn(obd, lcfg);
d212afd9
JL		 1209 err = 0;
1210 goto out;
d7e09d03
PT		 1211 }
1212 case LCFG_DEL_CONN: {
1213 err = class_del_conn(obd, lcfg);
d212afd9
JL		 1214 err = 0;
1215 goto out;
d7e09d03
PT		 1216 }
1217 case LCFG_POOL_NEW: {
1218 err = obd_pool_new(obd, lustre_cfg_string(lcfg, 2));
55df5fad
JL		 1219 err = 0;
1220 goto out;
d7e09d03
PT		 1221 }
1222 case LCFG_POOL_ADD: {
1223 err = obd_pool_add(obd, lustre_cfg_string(lcfg, 2),
1224 lustre_cfg_string(lcfg, 3));
55df5fad
JL		 1225 err = 0;
1226 goto out;
d7e09d03
PT		 1227 }
1228 case LCFG_POOL_REM: {
1229 err = obd_pool_rem(obd, lustre_cfg_string(lcfg, 2),
1230 lustre_cfg_string(lcfg, 3));
55df5fad
JL		 1231 err = 0;
1232 goto out;
d7e09d03
PT		 1233 }
1234 case LCFG_POOL_DEL: {
1235 err = obd_pool_del(obd, lustre_cfg_string(lcfg, 2));
55df5fad
JL		 1236 err = 0;
1237 goto out;
d7e09d03
PT		 1238 }
1239 default: {
1240 err = obd_process_config(obd, sizeof(*lcfg), lcfg);
d212afd9 1241 goto out;
d7e09d03
PT		 1242
1243 }
1244 }
1245out:
1246 if ((err < 0) && !(lcfg->lcfg_command & LCFG_REQUIRED)) {
1247 CWARN("Ignoring error %d on optional command %#x\n", err,
1248 lcfg->lcfg_command);
1249 err = 0;
1250 }
1251 return err;
1252}
1253EXPORT_SYMBOL(class_process_config);
1254
1255int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
1256 struct lustre_cfg *lcfg, void *data)
1257{
1258 struct lprocfs_vars *var;
73bb1da6
PT		 1259 struct file fakefile;
1260 struct seq_file fake_seqfile;
d7e09d03
PT		 1261 char *key, *sval;
1262 int i, keylen, vallen;
1263 int matched = 0, j = 0;
1264 int rc = 0;
1265 int skip = 0;
d7e09d03
PT		 1266
1267 if (lcfg->lcfg_command != LCFG_PARAM) {
1268 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
0a3bdb00 1269 return -EINVAL;
d7e09d03
PT		 1270 }
1271
73bb1da6
PT		 1272 /* fake a seq file so that var->fops->write can work... */
1273 fakefile.private_data = &fake_seqfile;
1274 fake_seqfile.private = data;
d7e09d03
PT		 1275 /* e.g. tunefs.lustre --param mdt.group_upcall=foo /r/tmp/lustre-mdt
1276 or lctl conf_param lustre-MDT0000.mdt.group_upcall=bar
1277 or lctl conf_param lustre-OST0000.osc.max_dirty_mb=36 */
1278 for (i = 1; i < lcfg->lcfg_bufcount; i++) {
1279 key = lustre_cfg_buf(lcfg, i);
1280 /* Strip off prefix */
1281 class_match_param(key, prefix, &key);
1282 sval = strchr(key, '=');
1283 if (!sval || (*(sval + 1) == 0)) {
1284 CERROR("Can't parse param %s (missing '=')\n", key);
1285 /* rc = -EINVAL; continue parsing other params */
1286 continue;
1287 }
1288 keylen = sval - key;
1289 sval++;
1290 vallen = strlen(sval);
1291 matched = 0;
1292 j = 0;
1293 /* Search proc entries */
1294 while (lvars[j].name) {
1295 var = &lvars[j];
ea7893bb
RD		 1296 if (class_match_param(key, (char *)var->name, NULL) == 0
1297 && keylen == strlen(var->name)) {
d7e09d03
PT		 1298 matched++;
1299 rc = -EROFS;
73bb1da6 1300 if (var->fops && var->fops->write) {
d7e09d03
PT		 1301 mm_segment_t oldfs;
1302 oldfs = get_fs();
1303 set_fs(KERNEL_DS);
73bb1da6
PT		 1304 rc = (var->fops->write)(&fakefile, sval,
1305 vallen, NULL);
d7e09d03
PT		 1306 set_fs(oldfs);
1307 }
1308 break;
1309 }
1310 j++;
1311 }
1312 if (!matched) {
1313 /* If the prefix doesn't match, return error so we
1314 can pass it down the stack */
1315 if (strnchr(key, keylen, '.'))
0a3bdb00 1316 return -ENOSYS;
d7e09d03
PT		 1317 CERROR("%s: unknown param %s\n",
1318 (char *)lustre_cfg_string(lcfg, 0), key);
1319 /* rc = -EINVAL; continue parsing other params */
1320 skip++;
1321 } else if (rc < 0) {
1322 CERROR("writing proc entry %s err %d\n",
1323 var->name, rc);
1324 rc = 0;
1325 } else {
1326 CDEBUG(D_CONFIG, "%s.%.*s: Set parameter %.*s=%s\n",
1327 lustre_cfg_string(lcfg, 0),
1328 (int)strlen(prefix) - 1, prefix,
1329 (int)(sval - key - 1), key, sval);
1330 }
1331 }
1332
1333 if (rc > 0)
1334 rc = 0;
1335 if (!rc && skip)
1336 rc = skip;
0a3bdb00 1337 return rc;
d7e09d03
PT		 1338}
1339EXPORT_SYMBOL(class_process_proc_param);
1340
1341extern int lustre_check_exclusion(struct super_block *sb, char *svname);
1342
1343/** Parse a configuration llog, doing various manipulations on them
1344 * for various reasons, (modifications for compatibility, skip obsolete
1345 * records, change uuids, etc), then class_process_config() resulting
1346 * net records.
1347 */
1348int class_config_llog_handler(const struct lu_env *env,
1349 struct llog_handle *handle,
1350 struct llog_rec_hdr *rec, void *data)
1351{
1352 struct config_llog_instance *clli = data;
1353 int cfg_len = rec->lrh_len;
bdbb0512 1354 char *cfg_buf = (char *) (rec + 1);
d7e09d03 1355 int rc = 0;
d7e09d03
PT		 1356
1357 //class_config_dump_handler(handle, rec, data);
1358
1359 switch (rec->lrh_type) {
1360 case OBD_CFG_REC: {
1361 struct lustre_cfg *lcfg, *lcfg_new;
1362 struct lustre_cfg_bufs bufs;
1363 char *inst_name = NULL;
1364 int inst_len = 0;
1365 int inst = 0, swab = 0;
1366
1367 lcfg = (struct lustre_cfg *)cfg_buf;
1368 if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION)) {
1369 lustre_swab_lustre_cfg(lcfg);
1370 swab = 1;
1371 }
1372
1373 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1374 if (rc)
d212afd9 1375 goto out;
d7e09d03
PT		 1376
1377 /* Figure out config state info */
1378 if (lcfg->lcfg_command == LCFG_MARKER) {
1379 struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1380 lustre_swab_cfg_marker(marker, swab,
1381 LUSTRE_CFG_BUFLEN(lcfg, 1));
1382 CDEBUG(D_CONFIG, "Marker, inst_flg=%#x mark_flg=%#x\n",
1383 clli->cfg_flags, marker->cm_flags);
1384 if (marker->cm_flags & CM_START) {
1385 /* all previous flags off */
1386 clli->cfg_flags = CFG_F_MARKER;
1387 if (marker->cm_flags & CM_SKIP) {
1388 clli->cfg_flags |= CFG_F_SKIP;
1389 CDEBUG(D_CONFIG, "SKIP #%d\n",
1390 marker->cm_step);
1391 } else if ((marker->cm_flags & CM_EXCLUDE) ||
1392 (clli->cfg_sb &&
1393 lustre_check_exclusion(clli->cfg_sb,
1394 marker->cm_tgtname))) {
1395 clli->cfg_flags |= CFG_F_EXCLUDE;
1396 CDEBUG(D_CONFIG, "EXCLUDE %d\n",
1397 marker->cm_step);
1398 }
1399 } else if (marker->cm_flags & CM_END) {
1400 clli->cfg_flags = 0;
1401 }
1402 }
1403 /* A config command without a start marker before it is
1404 illegal (post 146) */
1405 if (!(clli->cfg_flags & CFG_F_COMPAT146) &&
1406 !(clli->cfg_flags & CFG_F_MARKER) &&
1407 (lcfg->lcfg_command != LCFG_MARKER)) {
2d00bd17 1408 CWARN("Config not inside markers, ignoring! (inst: %p, uuid: %s, flags: %#x)\n",
d7e09d03
PT		 1409 clli->cfg_instance,
1410 clli->cfg_uuid.uuid, clli->cfg_flags);
1411 clli->cfg_flags |= CFG_F_SKIP;
1412 }
1413 if (clli->cfg_flags & CFG_F_SKIP) {
1414 CDEBUG(D_CONFIG, "skipping %#x\n",
1415 clli->cfg_flags);
1416 rc = 0;
1417 /* No processing! */
1418 break;
1419 }
1420
1421 /*
1422 * For interoperability between 1.8 and 2.0,
1423 * rename "mds" obd device type to "mdt".
1424 */
1425 {
1426 char *typename = lustre_cfg_string(lcfg, 1);
1427 char *index = lustre_cfg_string(lcfg, 2);
1428
1429 if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
1430 strcmp(typename, "mds") == 0)) {
2d00bd17 1431 CWARN("For 1.8 interoperability, rename obd type from mds to mdt\n");
d7e09d03
PT		 1432 typename[2] = 't';
1433 }
1434 if ((lcfg->lcfg_command == LCFG_SETUP && index &&
1435 strcmp(index, "type") == 0)) {
2d00bd17 1436 CDEBUG(D_INFO, "For 1.8 interoperability, set this index to '0'\n");
d7e09d03
PT		 1437 index[0] = '0';
1438 index[1] = 0;
1439 }
1440 }
1441
1442
f1b58c5a
NC		 1443 if (clli->cfg_flags & CFG_F_EXCLUDE) {
1444 CDEBUG(D_CONFIG, "cmd: %x marked EXCLUDED\n",
1445 lcfg->lcfg_command);
1446 if (lcfg->lcfg_command == LCFG_LOV_ADD_OBD)
1447 /* Add inactive instead */
1448 lcfg->lcfg_command = LCFG_LOV_ADD_INA;
1449 }
d7e09d03
PT		 1450
1451 lustre_cfg_bufs_init(&bufs, lcfg);
1452
1453 if (clli && clli->cfg_instance &&
b2952d62 1454 LUSTRE_CFG_BUFLEN(lcfg, 0) > 0) {
d7e09d03
PT		 1455 inst = 1;
1456 inst_len = LUSTRE_CFG_BUFLEN(lcfg, 0) +
1457 sizeof(clli->cfg_instance) * 2 + 4;
222a7e91
SB		 1458 inst_name = kasprintf(GFP_NOFS, "%s-%p",
1459 lustre_cfg_string(lcfg, 0),
1460 clli->cfg_instance);
485640b5 1461 if (!inst_name) {
d212afd9
JL		 1462 rc = -ENOMEM;
1463 goto out;
1464 }
d7e09d03
PT		 1465 lustre_cfg_bufs_set_string(&bufs, 0, inst_name);
1466 CDEBUG(D_CONFIG, "cmd %x, instance name: %s\n",
1467 lcfg->lcfg_command, inst_name);
1468 }
1469
1470 /* we override the llog's uuid for clients, to insure they
1471 are unique */
1472 if (clli && clli->cfg_instance != NULL &&
1473 lcfg->lcfg_command == LCFG_ATTACH) {
1474 lustre_cfg_bufs_set_string(&bufs, 2,
1475 clli->cfg_uuid.uuid);
1476 }
1477 /*
1478 * sptlrpc config record, we expect 2 data segments:
1479 * [0]: fs_name/target_name,
1480 * [1]: rule string
1481 * moving them to index [1] and [2], and insert MGC's
1482 * obdname at index [0].
1483 */
1484 if (clli && clli->cfg_instance == NULL &&
1485 lcfg->lcfg_command == LCFG_SPTLRPC_CONF) {
1486 lustre_cfg_bufs_set(&bufs, 2, bufs.lcfg_buf[1],
1487 bufs.lcfg_buflen[1]);
1488 lustre_cfg_bufs_set(&bufs, 1, bufs.lcfg_buf[0],
1489 bufs.lcfg_buflen[0]);
1490 lustre_cfg_bufs_set_string(&bufs, 0,
1491 clli->cfg_obdname);
1492 }
1493
1494 lcfg_new = lustre_cfg_new(lcfg->lcfg_command, &bufs);
1495
1496 lcfg_new->lcfg_num = lcfg->lcfg_num;
1497 lcfg_new->lcfg_flags = lcfg->lcfg_flags;
1498
1499 /* XXX Hack to try to remain binary compatible with
1500 * pre-newconfig logs */
1501 if (lcfg->lcfg_nal != 0 && /* pre-newconfig log? */
1502 (lcfg->lcfg_nid >> 32) == 0) {
1503 __u32 addr = (__u32)(lcfg->lcfg_nid & 0xffffffff);
1504
1505 lcfg_new->lcfg_nid =
1506 LNET_MKNID(LNET_MKNET(lcfg->lcfg_nal, 0), addr);
1507 CWARN("Converted pre-newconfig NAL %d NID %x to %s\n",
1508 lcfg->lcfg_nal, addr,
1509 libcfs_nid2str(lcfg_new->lcfg_nid));
1510 } else {
1511 lcfg_new->lcfg_nid = lcfg->lcfg_nid;
1512 }
1513
1514 lcfg_new->lcfg_nal = 0; /* illegal value for obsolete field */
1515
1516 rc = class_process_config(lcfg_new);
1517 lustre_cfg_free(lcfg_new);
1518
1519 if (inst)
d7279044 1520 kfree(inst_name);
d7e09d03
PT		 1521 break;
1522 }
1523 default:
1524 CERROR("Unknown llog record type %#x encountered\n",
1525 rec->lrh_type);
1526 break;
1527 }
1528out:
1529 if (rc) {
1530 CERROR("%s: cfg command failed: rc = %d\n",
1531 handle->lgh_ctxt->loc_obd->obd_name, rc);
1532 class_config_dump_handler(NULL, handle, rec, data);
1533 }
0a3bdb00 1534 return rc;
d7e09d03
PT		 1535}
1536EXPORT_SYMBOL(class_config_llog_handler);
1537
1538int class_config_parse_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
1539 char *name, struct config_llog_instance *cfg)
1540{
1541 struct llog_process_cat_data cd = {0, 0};
1542 struct llog_handle *llh;
1543 llog_cb_t callback;
1544 int rc;
d7e09d03
PT		 1545
1546 CDEBUG(D_INFO, "looking up llog %s\n", name);
1547 rc = llog_open(env, ctxt, &llh, NULL, name, LLOG_OPEN_EXISTS);
1548 if (rc)
0a3bdb00 1549 return rc;
d7e09d03
PT		 1550
1551 rc = llog_init_handle(env, llh, LLOG_F_IS_PLAIN, NULL);
1552 if (rc)
d212afd9 1553 goto parse_out;
d7e09d03
PT		 1554
1555 /* continue processing from where we last stopped to end-of-log */
1556 if (cfg) {
1557 cd.lpcd_first_idx = cfg->cfg_last_idx;
1558 callback = cfg->cfg_callback;
1559 LASSERT(callback != NULL);
1560 } else {
1561 callback = class_config_llog_handler;
1562 }
1563
1564 cd.lpcd_last_idx = 0;
1565
1566 rc = llog_process(env, llh, callback, cfg, &cd);
1567
1568 CDEBUG(D_CONFIG, "Processed log %s gen %d-%d (rc=%d)\n", name,
1569 cd.lpcd_first_idx + 1, cd.lpcd_last_idx, rc);
1570 if (cfg)
1571 cfg->cfg_last_idx = cd.lpcd_last_idx;
1572
1573parse_out:
1574 llog_close(env, llh);
0a3bdb00 1575 return rc;
d7e09d03
PT		 1576}
1577EXPORT_SYMBOL(class_config_parse_llog);
1578
1579/**
1580 * parse config record and output dump in supplied buffer.
1581 * This is separated from class_config_dump_handler() to use
1582 * for ioctl needs as well
1583 */
1584int class_config_parse_rec(struct llog_rec_hdr *rec, char *buf, int size)
1585{
1586 struct lustre_cfg *lcfg = (struct lustre_cfg *)(rec + 1);
1587 char *ptr = buf;
1588 char *end = buf + size;
1589 int rc = 0;
1590
d7e09d03
PT		 1591 LASSERT(rec->lrh_type == OBD_CFG_REC);
1592 rc = lustre_cfg_sanity_check(lcfg, rec->lrh_len);
1593 if (rc < 0)
0a3bdb00 1594 return rc;
d7e09d03
PT		 1595
1596 ptr += snprintf(ptr, end-ptr, "cmd=%05x ", lcfg->lcfg_command);
1597 if (lcfg->lcfg_flags)
1598 ptr += snprintf(ptr, end-ptr, "flags=%#08x ",
1599 lcfg->lcfg_flags);
1600
1601 if (lcfg->lcfg_num)
1602 ptr += snprintf(ptr, end-ptr, "num=%#08x ", lcfg->lcfg_num);
1603
1604 if (lcfg->lcfg_nid)
55f5a824 1605 ptr += snprintf(ptr, end-ptr, "nid=%s(%#llx)\n ",
d7e09d03
PT		 1606 libcfs_nid2str(lcfg->lcfg_nid),
1607 lcfg->lcfg_nid);
1608
1609 if (lcfg->lcfg_command == LCFG_MARKER) {
1610 struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1611
1612 ptr += snprintf(ptr, end-ptr, "marker=%d(%#x)%s '%s'",
1613 marker->cm_step, marker->cm_flags,
1614 marker->cm_tgtname, marker->cm_comment);
1615 } else {
1616 int i;
1617
1618 for (i = 0; i < lcfg->lcfg_bufcount; i++) {
1619 ptr += snprintf(ptr, end-ptr, "%d:%s ", i,
1620 lustre_cfg_string(lcfg, i));
1621 }
1622 }
1623 /* return consumed bytes */
1624 rc = ptr - buf;
0a3bdb00 1625 return rc;
d7e09d03
PT		 1626}
1627
1628int class_config_dump_handler(const struct lu_env *env,
1629 struct llog_handle *handle,
1630 struct llog_rec_hdr *rec, void *data)
1631{
1632 char *outstr;
1633 int rc = 0;
1634
d7279044 1635 outstr = kzalloc(256, GFP_NOFS);
485640b5 1636 if (!outstr)
0a3bdb00 1637 return -ENOMEM;
d7e09d03
PT		 1638
1639 if (rec->lrh_type == OBD_CFG_REC) {
1640 class_config_parse_rec(rec, outstr, 256);
1641 LCONSOLE(D_WARNING, " %s\n", outstr);
1642 } else {
1643 LCONSOLE(D_WARNING, "unhandled lrh_type: %#x\n", rec->lrh_type);
1644 rc = -EINVAL;
1645 }
1646
d7279044 1647 kfree(outstr);
0a3bdb00 1648 return rc;
d7e09d03
PT		 1649}
1650
1651int class_config_dump_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
1652 char *name, struct config_llog_instance *cfg)
1653{
1654 struct llog_handle *llh;
1655 int rc;
1656
d7e09d03
PT		 1657 LCONSOLE_INFO("Dumping config log %s\n", name);
1658
1659 rc = llog_open(env, ctxt, &llh, NULL, name, LLOG_OPEN_EXISTS);
1660 if (rc)
0a3bdb00 1661 return rc;
d7e09d03
PT		 1662
1663 rc = llog_init_handle(env, llh, LLOG_F_IS_PLAIN, NULL);
1664 if (rc)
d212afd9 1665 goto parse_out;
d7e09d03
PT		 1666
1667 rc = llog_process(env, llh, class_config_dump_handler, cfg, NULL);
1668parse_out:
1669 llog_close(env, llh);
1670
1671 LCONSOLE_INFO("End config log %s\n", name);
0a3bdb00 1672 return rc;
d7e09d03
PT		 1673}
1674EXPORT_SYMBOL(class_config_dump_llog);
1675
1676/** Call class_cleanup and class_detach.
1677 * "Manual" only in the sense that we're faking lcfg commands.
1678 */
1679int class_manual_cleanup(struct obd_device *obd)
1680{
1681 char flags[3] = "";
1682 struct lustre_cfg *lcfg;
1683 struct lustre_cfg_bufs bufs;
1684 int rc;
d7e09d03
PT		 1685
1686 if (!obd) {
1687 CERROR("empty cleanup\n");
0a3bdb00 1688 return -EALREADY;
d7e09d03
PT		 1689 }
1690
1691 if (obd->obd_force)
1692 strcat(flags, "F");
1693 if (obd->obd_fail)
1694 strcat(flags, "A");
1695
1696 CDEBUG(D_CONFIG, "Manual cleanup of %s (flags='%s')\n",
1697 obd->obd_name, flags);
1698
1699 lustre_cfg_bufs_reset(&bufs, obd->obd_name);
1700 lustre_cfg_bufs_set_string(&bufs, 1, flags);
1701 lcfg = lustre_cfg_new(LCFG_CLEANUP, &bufs);
1702 if (!lcfg)
0a3bdb00 1703 return -ENOMEM;
d7e09d03
PT		 1704
1705 rc = class_process_config(lcfg);
1706 if (rc) {
1707 CERROR("cleanup failed %d: %s\n", rc, obd->obd_name);
d212afd9 1708 goto out;
d7e09d03
PT		 1709 }
1710
1711 /* the lcfg is almost the same for both ops */
1712 lcfg->lcfg_command = LCFG_DETACH;
1713 rc = class_process_config(lcfg);
1714 if (rc)
1715 CERROR("detach failed %d: %s\n", rc, obd->obd_name);
1716out:
1717 lustre_cfg_free(lcfg);
0a3bdb00 1718 return rc;
d7e09d03
PT		 1719}
1720EXPORT_SYMBOL(class_manual_cleanup);
1721
1722/*
1723 * uuid<->export lustre hash operations
1724 */
1725
1726static unsigned
6da6eabe 1727uuid_hash(struct cfs_hash *hs, const void *key, unsigned mask)
d7e09d03
PT		 1728{
1729 return cfs_hash_djb2_hash(((struct obd_uuid *)key)->uuid,
1730 sizeof(((struct obd_uuid *)key)->uuid), mask);
1731}
1732
1733static void *
1734uuid_key(struct hlist_node *hnode)
1735{
1736 struct obd_export *exp;
1737
1738 exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1739
1740 return &exp->exp_client_uuid;
1741}
1742
1743/*
1744 * NOTE: It is impossible to find an export that is in failed
1745 * state with this function
1746 */
1747static int
1748uuid_keycmp(const void *key, struct hlist_node *hnode)
1749{
1750 struct obd_export *exp;
1751
1752 LASSERT(key);
1753 exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1754
1755 return obd_uuid_equals(key, &exp->exp_client_uuid) &&
1756 !exp->exp_failed;
1757}
1758
1759static void *
1760uuid_export_object(struct hlist_node *hnode)
1761{
1762 return hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1763}
1764
1765static void
6da6eabe 1766uuid_export_get(struct cfs_hash *hs, struct hlist_node *hnode)
d7e09d03
PT		 1767{
1768 struct obd_export *exp;
1769
1770 exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1771 class_export_get(exp);
1772}
1773
1774static void
6da6eabe 1775uuid_export_put_locked(struct cfs_hash *hs, struct hlist_node *hnode)
d7e09d03
PT		 1776{
1777 struct obd_export *exp;
1778
1779 exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1780 class_export_put(exp);
1781}
1782
1783static cfs_hash_ops_t uuid_hash_ops = {
1784 .hs_hash = uuid_hash,
1785 .hs_key = uuid_key,
1786 .hs_keycmp = uuid_keycmp,
1787 .hs_object = uuid_export_object,
1788 .hs_get = uuid_export_get,
1789 .hs_put_locked = uuid_export_put_locked,
1790};
1791
1792
1793/*
1794 * nid<->export hash operations
1795 */
1796
1797static unsigned
6da6eabe 1798nid_hash(struct cfs_hash *hs, const void *key, unsigned mask)
d7e09d03
PT		 1799{
1800 return cfs_hash_djb2_hash(key, sizeof(lnet_nid_t), mask);
1801}
1802
1803static void *
1804nid_key(struct hlist_node *hnode)
1805{
1806 struct obd_export *exp;
1807
1808 exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1809
0a3bdb00 1810 return &exp->exp_connection->c_peer.nid;
d7e09d03
PT		 1811}
1812
1813/*
1814 * NOTE: It is impossible to find an export that is in failed
1815 * state with this function
1816 */
1817static int
1818nid_kepcmp(const void *key, struct hlist_node *hnode)
1819{
1820 struct obd_export *exp;
1821
1822 LASSERT(key);
1823 exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1824
0a3bdb00
GKH		 1825 return exp->exp_connection->c_peer.nid == *(lnet_nid_t *)key &&
1826 !exp->exp_failed;
d7e09d03
PT		 1827}
1828
1829static void *
1830nid_export_object(struct hlist_node *hnode)
1831{
1832 return hlist_entry(hnode, struct obd_export, exp_nid_hash);
1833}
1834
1835static void
6da6eabe 1836nid_export_get(struct cfs_hash *hs, struct hlist_node *hnode)
d7e09d03
PT		 1837{
1838 struct obd_export *exp;
1839
1840 exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1841 class_export_get(exp);
1842}
1843
1844static void
6da6eabe 1845nid_export_put_locked(struct cfs_hash *hs, struct hlist_node *hnode)
d7e09d03
PT		 1846{
1847 struct obd_export *exp;
1848
1849 exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1850 class_export_put(exp);
1851}
1852
1853static cfs_hash_ops_t nid_hash_ops = {
1854 .hs_hash = nid_hash,
1855 .hs_key = nid_key,
1856 .hs_keycmp = nid_kepcmp,
1857 .hs_object = nid_export_object,
1858 .hs_get = nid_export_get,
1859 .hs_put_locked = nid_export_put_locked,
1860};
Linux kernel - Deliverables
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