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staging: lustre: Coalesce string fragments
[linux-2.6-block.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
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;
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
4a87df3e
CP		 64 ptr = strstr(buf, key);
65 if (ptr == NULL)
d7e09d03
PT		 66 return 1;
67
68 if (valp)
69 *valp = ptr + strlen(key);
70
71 return 0;
72}
73EXPORT_SYMBOL(class_find_param);
74
75/**
76 * Check whether the proc parameter \a param is an old parameter or not from
77 * the array \a ptr which contains the mapping from old parameters to new ones.
78 * If it's an old one, then return the pointer to the cfg_interop_param struc-
79 * ture which contains both the old and new parameters.
80 *
81 * \param param proc parameter
82 * \param ptr an array which contains the mapping from
83 * old parameters to new ones
84 *
85 * \retval valid-pointer pointer to the cfg_interop_param structure
86 * which contains the old and new parameters
87 * \retval NULL \a param or \a ptr is NULL,
88 * or \a param is not an old parameter
89 */
90struct cfg_interop_param *class_find_old_param(const char *param,
91 struct cfg_interop_param *ptr)
92{
93 char *value = NULL;
94 int name_len = 0;
95
96 if (param == NULL || ptr == NULL)
0a3bdb00 97 return NULL;
d7e09d03
PT		 98
99 value = strchr(param, '=');
100 if (value == NULL)
101 name_len = strlen(param);
102 else
103 name_len = value - param;
104
105 while (ptr->old_param != NULL) {
106 if (strncmp(param, ptr->old_param, name_len) == 0 &&
107 name_len == strlen(ptr->old_param))
0a3bdb00 108 return ptr;
d7e09d03
PT		 109 ptr++;
110 }
111
0a3bdb00 112 return NULL;
d7e09d03
PT		 113}
114EXPORT_SYMBOL(class_find_old_param);
115
116/**
117 * Finds a parameter in \a params and copies it to \a copy.
118 *
119 * Leading spaces are skipped. Next space or end of string is the
120 * parameter terminator with the exception that spaces inside single or double
121 * quotes get included into a parameter. The parameter is copied into \a copy
122 * which has to be allocated big enough by a caller, quotes are stripped in
123 * the copy and the copy is terminated by 0.
124 *
125 * On return \a params is set to next parameter or to NULL if last
126 * parameter is returned.
127 *
128 * \retval 0 if parameter is returned in \a copy
129 * \retval 1 otherwise
130 * \retval -EINVAL if unbalanced quota is found
131 */
132int class_get_next_param(char **params, char *copy)
133{
134 char *q1, *q2, *str;
135 int len;
136
137 str = *params;
138 while (*str == ' ')
139 str++;
140
141 if (*str == '\0') {
142 *params = NULL;
143 return 1;
144 }
145
146 while (1) {
147 q1 = strpbrk(str, " '\"");
148 if (q1 == NULL) {
149 len = strlen(str);
150 memcpy(copy, str, len);
151 copy[len] = '\0';
152 *params = NULL;
153 return 0;
154 }
155 len = q1 - str;
156 if (*q1 == ' ') {
157 memcpy(copy, str, len);
158 copy[len] = '\0';
159 *params = str + len;
160 return 0;
161 }
162
163 memcpy(copy, str, len);
164 copy += len;
165
166 /* search for the matching closing quote */
167 str = q1 + 1;
168 q2 = strchr(str, *q1);
169 if (q2 == NULL) {
170 CERROR("Unbalanced quota in parameters: \"%s\"\n",
171 *params);
172 return -EINVAL;
173 }
174 len = q2 - str;
175 memcpy(copy, str, len);
176 copy += len;
177 str = q2 + 1;
178 }
179 return 1;
180}
181EXPORT_SYMBOL(class_get_next_param);
182
183/* returns 0 if this is the first key in the buffer, else 1.
184 valp points to first char after key. */
185int class_match_param(char *buf, char *key, char **valp)
186{
187 if (!buf)
188 return 1;
189
190 if (memcmp(buf, key, strlen(key)) != 0)
191 return 1;
192
193 if (valp)
194 *valp = buf + strlen(key);
195
196 return 0;
197}
198EXPORT_SYMBOL(class_match_param);
199
200static int parse_nid(char *buf, void *value, int quiet)
201{
202 lnet_nid_t *nid = (lnet_nid_t *)value;
203
204 *nid = libcfs_str2nid(buf);
205 if (*nid != LNET_NID_ANY)
206 return 0;
207
208 if (!quiet)
209 LCONSOLE_ERROR_MSG(0x159, "Can't parse NID '%s'\n", buf);
210 return -EINVAL;
211}
212
213static int parse_net(char *buf, void *value)
214{
215 __u32 *net = (__u32 *)value;
216
217 *net = libcfs_str2net(buf);
218 CDEBUG(D_INFO, "Net %s\n", libcfs_net2str(*net));
219 return 0;
220}
221
222enum {
223 CLASS_PARSE_NID = 1,
224 CLASS_PARSE_NET,
225};
226
227/* 0 is good nid,
228 1 not found
229 < 0 error
230 endh is set to next separator */
231static int class_parse_value(char *buf, int opc, void *value, char **endh,
232 int quiet)
233{
234 char *endp;
235 char tmp;
236 int rc = 0;
237
238 if (!buf)
239 return 1;
240 while (*buf == ',' || *buf == ':')
241 buf++;
242 if (*buf == ' ' || *buf == '/' || *buf == '\0')
243 return 1;
244
245 /* nid separators or end of nids */
246 endp = strpbrk(buf, ",: /");
247 if (endp == NULL)
248 endp = buf + strlen(buf);
249
250 tmp = *endp;
251 *endp = '\0';
252 switch (opc) {
253 default:
254 LBUG();
255 case CLASS_PARSE_NID:
256 rc = parse_nid(buf, value, quiet);
257 break;
258 case CLASS_PARSE_NET:
259 rc = parse_net(buf, value);
260 break;
261 }
262 *endp = tmp;
263 if (rc != 0)
264 return rc;
265 if (endh)
266 *endh = endp;
267 return 0;
268}
269
270int class_parse_nid(char *buf, lnet_nid_t *nid, char **endh)
271{
272 return class_parse_value(buf, CLASS_PARSE_NID, (void *)nid, endh, 0);
273}
274EXPORT_SYMBOL(class_parse_nid);
275
276int class_parse_nid_quiet(char *buf, lnet_nid_t *nid, char **endh)
277{
278 return class_parse_value(buf, CLASS_PARSE_NID, (void *)nid, endh, 1);
279}
280EXPORT_SYMBOL(class_parse_nid_quiet);
281
282int class_parse_net(char *buf, __u32 *net, char **endh)
283{
284 return class_parse_value(buf, CLASS_PARSE_NET, (void *)net, endh, 0);
285}
286EXPORT_SYMBOL(class_parse_net);
287
288/* 1 param contains key and match
289 * 0 param contains key and not match
290 * -1 param does not contain key
291 */
292int class_match_nid(char *buf, char *key, lnet_nid_t nid)
293{
294 lnet_nid_t tmp;
295 int rc = -1;
296
297 while (class_find_param(buf, key, &buf) == 0) {
298 /* please restrict to the nids pertaining to
299 * the specified nids */
300 while (class_parse_nid(buf, &tmp, &buf) == 0) {
301 if (tmp == nid)
302 return 1;
303 }
304 rc = 0;
305 }
306 return rc;
307}
308EXPORT_SYMBOL(class_match_nid);
309
310int class_match_net(char *buf, char *key, __u32 net)
311{
312 __u32 tmp;
313 int rc = -1;
314
315 while (class_find_param(buf, key, &buf) == 0) {
316 /* please restrict to the nids pertaining to
317 * the specified networks */
318 while (class_parse_net(buf, &tmp, &buf) == 0) {
319 if (tmp == net)
320 return 1;
321 }
322 rc = 0;
323 }
324 return rc;
325}
326EXPORT_SYMBOL(class_match_net);
327
328/********************** class fns **********************/
329
330/**
331 * Create a new obd device and set the type, name and uuid. If successful,
332 * the new device can be accessed by either name or uuid.
333 */
334int class_attach(struct lustre_cfg *lcfg)
335{
336 struct obd_device *obd = NULL;
337 char *typename, *name, *uuid;
338 int rc, len;
d7e09d03
PT		 339
340 if (!LUSTRE_CFG_BUFLEN(lcfg, 1)) {
341 CERROR("No type passed!\n");
0a3bdb00 342 return -EINVAL;
d7e09d03
PT		 343 }
344 typename = lustre_cfg_string(lcfg, 1);
345
346 if (!LUSTRE_CFG_BUFLEN(lcfg, 0)) {
347 CERROR("No name passed!\n");
0a3bdb00 348 return -EINVAL;
d7e09d03
PT		 349 }
350 name = lustre_cfg_string(lcfg, 0);
351
352 if (!LUSTRE_CFG_BUFLEN(lcfg, 2)) {
353 CERROR("No UUID passed!\n");
0a3bdb00 354 return -EINVAL;
d7e09d03
PT		 355 }
356 uuid = lustre_cfg_string(lcfg, 2);
357
358 CDEBUG(D_IOCTL, "attach type %s name: %s uuid: %s\n",
359 MKSTR(typename), MKSTR(name), MKSTR(uuid));
360
361 obd = class_newdev(typename, name);
362 if (IS_ERR(obd)) {
363 /* Already exists or out of obds */
364 rc = PTR_ERR(obd);
365 obd = NULL;
366 CERROR("Cannot create device %s of type %s : %d\n",
367 name, typename, rc);
d212afd9 368 goto out;
d7e09d03
PT		 369 }
370 LASSERTF(obd != NULL, "Cannot get obd device %s of type %s\n",
371 name, typename);
372 LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
373 "obd %p obd_magic %08X != %08X\n",
374 obd, obd->obd_magic, OBD_DEVICE_MAGIC);
375 LASSERTF(strncmp(obd->obd_name, name, strlen(name)) == 0,
376 "%p obd_name %s != %s\n", obd, obd->obd_name, name);
377
378 rwlock_init(&obd->obd_pool_lock);
379 obd->obd_pool_limit = 0;
380 obd->obd_pool_slv = 0;
381
382 INIT_LIST_HEAD(&obd->obd_exports);
383 INIT_LIST_HEAD(&obd->obd_unlinked_exports);
384 INIT_LIST_HEAD(&obd->obd_delayed_exports);
385 INIT_LIST_HEAD(&obd->obd_exports_timed);
386 INIT_LIST_HEAD(&obd->obd_nid_stats);
387 spin_lock_init(&obd->obd_nid_lock);
388 spin_lock_init(&obd->obd_dev_lock);
389 mutex_init(&obd->obd_dev_mutex);
390 spin_lock_init(&obd->obd_osfs_lock);
391 /* obd->obd_osfs_age must be set to a value in the distant
392 * past to guarantee a fresh statfs is fetched on mount. */
393 obd->obd_osfs_age = cfs_time_shift_64(-1000);
394
395 /* XXX belongs in setup not attach */
396 init_rwsem(&obd->obd_observer_link_sem);
397 /* recovery data */
398 cfs_init_timer(&obd->obd_recovery_timer);
399 spin_lock_init(&obd->obd_recovery_task_lock);
400 init_waitqueue_head(&obd->obd_next_transno_waitq);
401 init_waitqueue_head(&obd->obd_evict_inprogress_waitq);
402 INIT_LIST_HEAD(&obd->obd_req_replay_queue);
403 INIT_LIST_HEAD(&obd->obd_lock_replay_queue);
404 INIT_LIST_HEAD(&obd->obd_final_req_queue);
405 INIT_LIST_HEAD(&obd->obd_evict_list);
406
407 llog_group_init(&obd->obd_olg, FID_SEQ_LLOG);
408
409 obd->obd_conn_inprogress = 0;
410
411 len = strlen(uuid);
412 if (len >= sizeof(obd->obd_uuid)) {
413 CERROR("uuid must be < %d bytes long\n",
414 (int)sizeof(obd->obd_uuid));
d212afd9
JL		 415 rc = -EINVAL;
416 goto out;
d7e09d03
PT		 417 }
418 memcpy(obd->obd_uuid.uuid, uuid, len);
419
420 /* do the attach */
421 if (OBP(obd, attach)) {
ec83e611 422 rc = OBP(obd, attach)(obd, sizeof(*lcfg), lcfg);
d212afd9
JL		 423 if (rc) {
424 rc = -EINVAL;
425 goto out;
426 }
d7e09d03
PT		 427 }
428
429 /* Detach drops this */
430 spin_lock(&obd->obd_dev_lock);
431 atomic_set(&obd->obd_refcount, 1);
432 spin_unlock(&obd->obd_dev_lock);
433 lu_ref_init(&obd->obd_reference);
434 lu_ref_add(&obd->obd_reference, "attach", obd);
435
436 obd->obd_attached = 1;
437 CDEBUG(D_IOCTL, "OBD: dev %d attached type %s with refcount %d\n",
438 obd->obd_minor, typename, atomic_read(&obd->obd_refcount));
0a3bdb00 439 return 0;
d7e09d03
PT		 440 out:
441 if (obd != NULL) {
442 class_release_dev(obd);
443 }
444 return rc;
445}
446EXPORT_SYMBOL(class_attach);
447
448/** Create hashes, self-export, and call type-specific setup.
449 * Setup is effectively the "start this obd" call.
450 */
451int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
452{
453 int err = 0;
454 struct obd_export *exp;
d7e09d03
PT		 455
456 LASSERT(obd != NULL);
457 LASSERTF(obd == class_num2obd(obd->obd_minor),
458 "obd %p != obd_devs[%d] %p\n",
459 obd, obd->obd_minor, class_num2obd(obd->obd_minor));
460 LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
461 "obd %p obd_magic %08x != %08x\n",
462 obd, obd->obd_magic, OBD_DEVICE_MAGIC);
463
464 /* have we attached a type to this device? */
465 if (!obd->obd_attached) {
466 CERROR("Device %d not attached\n", obd->obd_minor);
0a3bdb00 467 return -ENODEV;
d7e09d03
PT		 468 }
469
470 if (obd->obd_set_up) {
471 CERROR("Device %d already setup (type %s)\n",
472 obd->obd_minor, obd->obd_type->typ_name);
0a3bdb00 473 return -EEXIST;
d7e09d03
PT		 474 }
475
476 /* is someone else setting us up right now? (attach inits spinlock) */
477 spin_lock(&obd->obd_dev_lock);
478 if (obd->obd_starting) {
479 spin_unlock(&obd->obd_dev_lock);
480 CERROR("Device %d setup in progress (type %s)\n",
481 obd->obd_minor, obd->obd_type->typ_name);
0a3bdb00 482 return -EEXIST;
d7e09d03
PT		 483 }
484 /* just leave this on forever. I can't use obd_set_up here because
485 other fns check that status, and we're not actually set up yet. */
486 obd->obd_starting = 1;
487 obd->obd_uuid_hash = NULL;
488 obd->obd_nid_hash = NULL;
489 obd->obd_nid_stats_hash = NULL;
490 spin_unlock(&obd->obd_dev_lock);
491
492 /* create an uuid-export lustre hash */
493 obd->obd_uuid_hash = cfs_hash_create("UUID_HASH",
494 HASH_UUID_CUR_BITS,
495 HASH_UUID_MAX_BITS,
496 HASH_UUID_BKT_BITS, 0,
497 CFS_HASH_MIN_THETA,
498 CFS_HASH_MAX_THETA,
499 &uuid_hash_ops, CFS_HASH_DEFAULT);
d212afd9
JL		 500 if (!obd->obd_uuid_hash) {
501 err = -ENOMEM;
502 goto err_hash;
503 }
d7e09d03
PT		 504
505 /* create a nid-export lustre hash */
506 obd->obd_nid_hash = cfs_hash_create("NID_HASH",
507 HASH_NID_CUR_BITS,
508 HASH_NID_MAX_BITS,
509 HASH_NID_BKT_BITS, 0,
510 CFS_HASH_MIN_THETA,
511 CFS_HASH_MAX_THETA,
512 &nid_hash_ops, CFS_HASH_DEFAULT);
d212afd9
JL		 513 if (!obd->obd_nid_hash) {
514 err = -ENOMEM;
515 goto err_hash;
516 }
d7e09d03
PT		 517
518 /* create a nid-stats lustre hash */
519 obd->obd_nid_stats_hash = cfs_hash_create("NID_STATS",
520 HASH_NID_STATS_CUR_BITS,
521 HASH_NID_STATS_MAX_BITS,
522 HASH_NID_STATS_BKT_BITS, 0,
523 CFS_HASH_MIN_THETA,
524 CFS_HASH_MAX_THETA,
525 &nid_stat_hash_ops, CFS_HASH_DEFAULT);
d212afd9
JL		 526 if (!obd->obd_nid_stats_hash) {
527 err = -ENOMEM;
528 goto err_hash;
529 }
d7e09d03
PT		 530
531 exp = class_new_export(obd, &obd->obd_uuid);
d212afd9
JL		 532 if (IS_ERR(exp)) {
533 err = PTR_ERR(exp);
534 goto err_hash;
535 }
d7e09d03
PT		 536
537 obd->obd_self_export = exp;
538 list_del_init(&exp->exp_obd_chain_timed);
539 class_export_put(exp);
540
541 err = obd_setup(obd, lcfg);
542 if (err)
d212afd9 543 goto err_exp;
d7e09d03
PT		 544
545 obd->obd_set_up = 1;
546
547 spin_lock(&obd->obd_dev_lock);
548 /* cleanup drops this */
549 class_incref(obd, "setup", obd);
550 spin_unlock(&obd->obd_dev_lock);
551
552 CDEBUG(D_IOCTL, "finished setup of obd %s (uuid %s)\n",
553 obd->obd_name, obd->obd_uuid.uuid);
554
0a3bdb00 555 return 0;
d7e09d03
PT		 556err_exp:
557 if (obd->obd_self_export) {
558 class_unlink_export(obd->obd_self_export);
559 obd->obd_self_export = NULL;
560 }
561err_hash:
562 if (obd->obd_uuid_hash) {
563 cfs_hash_putref(obd->obd_uuid_hash);
564 obd->obd_uuid_hash = NULL;
565 }
566 if (obd->obd_nid_hash) {
567 cfs_hash_putref(obd->obd_nid_hash);
568 obd->obd_nid_hash = NULL;
569 }
570 if (obd->obd_nid_stats_hash) {
571 cfs_hash_putref(obd->obd_nid_stats_hash);
572 obd->obd_nid_stats_hash = NULL;
573 }
574 obd->obd_starting = 0;
575 CERROR("setup %s failed (%d)\n", obd->obd_name, err);
576 return err;
577}
578EXPORT_SYMBOL(class_setup);
579
580/** We have finished using this obd and are ready to destroy it.
581 * There can be no more references to this obd.
582 */
583int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg)
584{
d7e09d03
PT		 585 if (obd->obd_set_up) {
586 CERROR("OBD device %d still set up\n", obd->obd_minor);
0a3bdb00 587 return -EBUSY;
d7e09d03
PT		 588 }
589
590 spin_lock(&obd->obd_dev_lock);
591 if (!obd->obd_attached) {
592 spin_unlock(&obd->obd_dev_lock);
593 CERROR("OBD device %d not attached\n", obd->obd_minor);
0a3bdb00 594 return -ENODEV;
d7e09d03
PT		 595 }
596 obd->obd_attached = 0;
597 spin_unlock(&obd->obd_dev_lock);
598
599 CDEBUG(D_IOCTL, "detach on obd %s (uuid %s)\n",
600 obd->obd_name, obd->obd_uuid.uuid);
601
602 class_decref(obd, "attach", obd);
0a3bdb00 603 return 0;
d7e09d03
PT		 604}
605EXPORT_SYMBOL(class_detach);
606
52cf6acf 607/** Start shutting down the obd. There may be in-progress ops when
d7e09d03
PT		 608 * this is called. We tell them to start shutting down with a call
609 * to class_disconnect_exports().
610 */
611int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg)
612{
613 int err = 0;
614 char *flag;
d7e09d03
PT		 615
616 OBD_RACE(OBD_FAIL_LDLM_RECOV_CLIENTS);
617
618 if (!obd->obd_set_up) {
619 CERROR("Device %d not setup\n", obd->obd_minor);
0a3bdb00 620 return -ENODEV;
d7e09d03
PT		 621 }
622
623 spin_lock(&obd->obd_dev_lock);
624 if (obd->obd_stopping) {
625 spin_unlock(&obd->obd_dev_lock);
626 CERROR("OBD %d already stopping\n", obd->obd_minor);
0a3bdb00 627 return -ENODEV;
d7e09d03
PT		 628 }
629 /* Leave this on forever */
630 obd->obd_stopping = 1;
631
632 /* wait for already-arrived-connections to finish. */
633 while (obd->obd_conn_inprogress > 0) {
634 spin_unlock(&obd->obd_dev_lock);
635
636 cond_resched();
637
638 spin_lock(&obd->obd_dev_lock);
639 }
640 spin_unlock(&obd->obd_dev_lock);
641
642 if (lcfg->lcfg_bufcount >= 2 && LUSTRE_CFG_BUFLEN(lcfg, 1) > 0) {
643 for (flag = lustre_cfg_string(lcfg, 1); *flag != 0; flag++)
644 switch (*flag) {
645 case 'F':
646 obd->obd_force = 1;
647 break;
648 case 'A':
649 LCONSOLE_WARN("Failing over %s\n",
650 obd->obd_name);
651 obd->obd_fail = 1;
652 obd->obd_no_transno = 1;
653 obd->obd_no_recov = 1;
654 if (OBP(obd, iocontrol)) {
655 obd_iocontrol(OBD_IOC_SYNC,
656 obd->obd_self_export,
657 0, NULL, NULL);
658 }
659 break;
660 default:
661 CERROR("Unrecognised flag '%c'\n", *flag);
662 }
663 }
664
665 LASSERT(obd->obd_self_export);
666
667 /* The three references that should be remaining are the
668 * obd_self_export and the attach and setup references. */
669 if (atomic_read(&obd->obd_refcount) > 3) {
52cf6acf 670 /* refcount - 3 might be the number of real exports
d7e09d03
PT		 671 (excluding self export). But class_incref is called
672 by other things as well, so don't count on it. */
673 CDEBUG(D_IOCTL, "%s: forcing exports to disconnect: %d\n",
674 obd->obd_name, atomic_read(&obd->obd_refcount) - 3);
675 dump_exports(obd, 0);
676 class_disconnect_exports(obd);
677 }
678
679 /* Precleanup, we must make sure all exports get destroyed. */
680 err = obd_precleanup(obd, OBD_CLEANUP_EXPORTS);
681 if (err)
682 CERROR("Precleanup %s returned %d\n",
683 obd->obd_name, err);
684
685 /* destroy an uuid-export hash body */
686 if (obd->obd_uuid_hash) {
687 cfs_hash_putref(obd->obd_uuid_hash);
688 obd->obd_uuid_hash = NULL;
689 }
690
691 /* destroy a nid-export hash body */
692 if (obd->obd_nid_hash) {
693 cfs_hash_putref(obd->obd_nid_hash);
694 obd->obd_nid_hash = NULL;
695 }
696
697 /* destroy a nid-stats hash body */
698 if (obd->obd_nid_stats_hash) {
699 cfs_hash_putref(obd->obd_nid_stats_hash);
700 obd->obd_nid_stats_hash = NULL;
701 }
702
703 class_decref(obd, "setup", obd);
704 obd->obd_set_up = 0;
705
0a3bdb00 706 return 0;
d7e09d03
PT		 707}
708EXPORT_SYMBOL(class_cleanup);
709
710struct obd_device *class_incref(struct obd_device *obd,
711 const char *scope, const void *source)
712{
713 lu_ref_add_atomic(&obd->obd_reference, scope, source);
714 atomic_inc(&obd->obd_refcount);
715 CDEBUG(D_INFO, "incref %s (%p) now %d\n", obd->obd_name, obd,
716 atomic_read(&obd->obd_refcount));
717
718 return obd;
719}
720EXPORT_SYMBOL(class_incref);
721
722void class_decref(struct obd_device *obd, const char *scope, const void *source)
723{
724 int err;
725 int refs;
726
727 spin_lock(&obd->obd_dev_lock);
728 atomic_dec(&obd->obd_refcount);
729 refs = atomic_read(&obd->obd_refcount);
730 spin_unlock(&obd->obd_dev_lock);
731 lu_ref_del(&obd->obd_reference, scope, source);
732
733 CDEBUG(D_INFO, "Decref %s (%p) now %d\n", obd->obd_name, obd, refs);
734
735 if ((refs == 1) && obd->obd_stopping) {
736 /* All exports have been destroyed; there should
737 be no more in-progress ops by this point.*/
738
739 spin_lock(&obd->obd_self_export->exp_lock);
740 obd->obd_self_export->exp_flags |= exp_flags_from_obd(obd);
741 spin_unlock(&obd->obd_self_export->exp_lock);
742
743 /* note that we'll recurse into class_decref again */
744 class_unlink_export(obd->obd_self_export);
745 return;
746 }
747
748 if (refs == 0) {
749 CDEBUG(D_CONFIG, "finishing cleanup of obd %s (%s)\n",
750 obd->obd_name, obd->obd_uuid.uuid);
751 LASSERT(!obd->obd_attached);
752 if (obd->obd_stopping) {
753 /* If we're not stopping, we were never set up */
754 err = obd_cleanup(obd);
755 if (err)
756 CERROR("Cleanup %s returned %d\n",
757 obd->obd_name, err);
758 }
759 if (OBP(obd, detach)) {
760 err = OBP(obd, detach)(obd);
761 if (err)
762 CERROR("Detach returned %d\n", err);
763 }
764 class_release_dev(obd);
765 }
766}
767EXPORT_SYMBOL(class_decref);
768
769/** Add a failover nid location.
770 * Client obd types contact server obd types using this nid list.
771 */
772int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
773{
774 struct obd_import *imp;
775 struct obd_uuid uuid;
776 int rc;
d7e09d03
PT		 777
778 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
779 LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
780 CERROR("invalid conn_uuid\n");
0a3bdb00 781 return -EINVAL;
d7e09d03
PT		 782 }
783 if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
784 strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) &&
785 strcmp(obd->obd_type->typ_name, LUSTRE_OSP_NAME) &&
786 strcmp(obd->obd_type->typ_name, LUSTRE_LWP_NAME) &&
787 strcmp(obd->obd_type->typ_name, LUSTRE_MGC_NAME)) {
788 CERROR("can't add connection on non-client dev\n");
0a3bdb00 789 return -EINVAL;
d7e09d03
PT		 790 }
791
792 imp = obd->u.cli.cl_import;
793 if (!imp) {
794 CERROR("try to add conn on immature client dev\n");
0a3bdb00 795 return -EINVAL;
d7e09d03
PT		 796 }
797
798 obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
799 rc = obd_add_conn(imp, &uuid, lcfg->lcfg_num);
800
0a3bdb00 801 return rc;
d7e09d03
PT		 802}
803EXPORT_SYMBOL(class_add_conn);
804
805/** Remove a failover nid location.
806 */
807int class_del_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
808{
809 struct obd_import *imp;
810 struct obd_uuid uuid;
811 int rc;
d7e09d03
PT		 812
813 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
814 LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
815 CERROR("invalid conn_uuid\n");
0a3bdb00 816 return -EINVAL;
d7e09d03
PT		 817 }
818 if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
819 strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME)) {
820 CERROR("can't del connection on non-client dev\n");
0a3bdb00 821 return -EINVAL;
d7e09d03
PT		 822 }
823
824 imp = obd->u.cli.cl_import;
825 if (!imp) {
826 CERROR("try to del conn on immature client dev\n");
0a3bdb00 827 return -EINVAL;
d7e09d03
PT		 828 }
829
830 obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
831 rc = obd_del_conn(imp, &uuid);
832
0a3bdb00 833 return rc;
d7e09d03
PT		 834}
835
836LIST_HEAD(lustre_profile_list);
837
54442610 838struct lustre_profile *class_get_profile(const char *prof)
d7e09d03
PT		 839{
840 struct lustre_profile *lprof;
841
d7e09d03
PT		 842 list_for_each_entry(lprof, &lustre_profile_list, lp_list) {
843 if (!strcmp(lprof->lp_profile, prof)) {
0a3bdb00 844 return lprof;
d7e09d03
PT		 845 }
846 }
0a3bdb00 847 return NULL;
d7e09d03
PT		 848}
849EXPORT_SYMBOL(class_get_profile);
850
851/** Create a named "profile".
852 * This defines the mdc and osc names to use for a client.
853 * This also is used to define the lov to be used by a mdt.
854 */
855int class_add_profile(int proflen, char *prof, int osclen, char *osc,
856 int mdclen, char *mdc)
857{
858 struct lustre_profile *lprof;
859 int err = 0;
d7e09d03
PT		 860
861 CDEBUG(D_CONFIG, "Add profile %s\n", prof);
862
863 OBD_ALLOC(lprof, sizeof(*lprof));
864 if (lprof == NULL)
0a3bdb00 865 return -ENOMEM;
d7e09d03
PT		 866 INIT_LIST_HEAD(&lprof->lp_list);
867
868 LASSERT(proflen == (strlen(prof) + 1));
869 OBD_ALLOC(lprof->lp_profile, proflen);
d212afd9
JL		 870 if (lprof->lp_profile == NULL) {
871 err = -ENOMEM;
872 goto out;
873 }
d7e09d03
PT		 874 memcpy(lprof->lp_profile, prof, proflen);
875
876 LASSERT(osclen == (strlen(osc) + 1));
877 OBD_ALLOC(lprof->lp_dt, osclen);
d212afd9
JL		 878 if (lprof->lp_dt == NULL) {
879 err = -ENOMEM;
880 goto out;
881 }
d7e09d03
PT		 882 memcpy(lprof->lp_dt, osc, osclen);
883
884 if (mdclen > 0) {
885 LASSERT(mdclen == (strlen(mdc) + 1));
886 OBD_ALLOC(lprof->lp_md, mdclen);
d212afd9
JL		 887 if (lprof->lp_md == NULL) {
888 err = -ENOMEM;
889 goto out;
890 }
d7e09d03
PT		 891 memcpy(lprof->lp_md, mdc, mdclen);
892 }
893
894 list_add(&lprof->lp_list, &lustre_profile_list);
0a3bdb00 895 return err;
d7e09d03
PT		 896
897out:
898 if (lprof->lp_md)
899 OBD_FREE(lprof->lp_md, mdclen);
900 if (lprof->lp_dt)
901 OBD_FREE(lprof->lp_dt, osclen);
902 if (lprof->lp_profile)
903 OBD_FREE(lprof->lp_profile, proflen);
904 OBD_FREE(lprof, sizeof(*lprof));
0a3bdb00 905 return err;
d7e09d03
PT		 906}
907
908void class_del_profile(const char *prof)
909{
910 struct lustre_profile *lprof;
d7e09d03
PT		 911
912 CDEBUG(D_CONFIG, "Del profile %s\n", prof);
913
914 lprof = class_get_profile(prof);
915 if (lprof) {
916 list_del(&lprof->lp_list);
917 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
918 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
919 if (lprof->lp_md)
920 OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
ec83e611 921 OBD_FREE(lprof, sizeof(*lprof));
d7e09d03 922 }
d7e09d03
PT		 923}
924EXPORT_SYMBOL(class_del_profile);
925
926/* COMPAT_146 */
927void class_del_profiles(void)
928{
929 struct lustre_profile *lprof, *n;
d7e09d03
PT		 930
931 list_for_each_entry_safe(lprof, n, &lustre_profile_list, lp_list) {
932 list_del(&lprof->lp_list);
933 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
934 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
935 if (lprof->lp_md)
936 OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
ec83e611 937 OBD_FREE(lprof, sizeof(*lprof));
d7e09d03 938 }
d7e09d03
PT		 939}
940EXPORT_SYMBOL(class_del_profiles);
941
942static int class_set_global(char *ptr, int val, struct lustre_cfg *lcfg)
943{
d7e09d03
PT		 944 if (class_match_param(ptr, PARAM_AT_MIN, NULL) == 0)
945 at_min = val;
946 else if (class_match_param(ptr, PARAM_AT_MAX, NULL) == 0)
947 at_max = val;
948 else if (class_match_param(ptr, PARAM_AT_EXTRA, NULL) == 0)
949 at_extra = val;
950 else if (class_match_param(ptr, PARAM_AT_EARLY_MARGIN, NULL) == 0)
951 at_early_margin = val;
952 else if (class_match_param(ptr, PARAM_AT_HISTORY, NULL) == 0)
953 at_history = val;
954 else if (class_match_param(ptr, PARAM_JOBID_VAR, NULL) == 0)
955 strlcpy(obd_jobid_var, lustre_cfg_string(lcfg, 2),
956 JOBSTATS_JOBID_VAR_MAX_LEN + 1);
957 else
0a3bdb00 958 return -EINVAL;
d7e09d03
PT		 959
960 CDEBUG(D_IOCTL, "global %s = %d\n", ptr, val);
0a3bdb00 961 return 0;
d7e09d03
PT		 962}
963
964
965/* We can't call ll_process_config or lquota_process_config directly because
966 * it lives in a module that must be loaded after this one. */
967static int (*client_process_config)(struct lustre_cfg *lcfg) = NULL;
968static int (*quota_process_config)(struct lustre_cfg *lcfg) = NULL;
969
970void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg))
971{
972 client_process_config = cpc;
973}
974EXPORT_SYMBOL(lustre_register_client_process_config);
975
976/**
977 * Rename the proc parameter in \a cfg with a new name \a new_name.
978 *
979 * \param cfg config structure which contains the proc parameter
980 * \param new_name new name of the proc parameter
981 *
982 * \retval valid-pointer pointer to the newly-allocated config structure
983 * which contains the renamed proc parameter
984 * \retval ERR_PTR(-EINVAL) if \a cfg or \a new_name is NULL, or \a cfg does
985 * not contain a proc parameter
986 * \retval ERR_PTR(-ENOMEM) if memory allocation failure occurs
987 */
988struct lustre_cfg *lustre_cfg_rename(struct lustre_cfg *cfg,
989 const char *new_name)
990{
991 struct lustre_cfg_bufs *bufs = NULL;
992 struct lustre_cfg *new_cfg = NULL;
993 char *param = NULL;
994 char *new_param = NULL;
995 char *value = NULL;
996 int name_len = 0;
997 int new_len = 0;
d7e09d03
PT		 998
999 if (cfg == NULL || new_name == NULL)
0a3bdb00 1000 return ERR_PTR(-EINVAL);
d7e09d03
PT		 1001
1002 param = lustre_cfg_string(cfg, 1);
1003 if (param == NULL)
0a3bdb00 1004 return ERR_PTR(-EINVAL);
d7e09d03
PT		 1005
1006 value = strchr(param, '=');
1007 if (value == NULL)
1008 name_len = strlen(param);
1009 else
1010 name_len = value - param;
1011
1012 new_len = LUSTRE_CFG_BUFLEN(cfg, 1) + strlen(new_name) - name_len;
1013
1014 OBD_ALLOC(new_param, new_len);
1015 if (new_param == NULL)
0a3bdb00 1016 return ERR_PTR(-ENOMEM);
d7e09d03
PT		 1017
1018 strcpy(new_param, new_name);
1019 if (value != NULL)
1020 strcat(new_param, value);
1021
1022 OBD_ALLOC_PTR(bufs);
1023 if (bufs == NULL) {
1024 OBD_FREE(new_param, new_len);
0a3bdb00 1025 return ERR_PTR(-ENOMEM);
d7e09d03
PT		 1026 }
1027
1028 lustre_cfg_bufs_reset(bufs, NULL);
1029 lustre_cfg_bufs_init(bufs, cfg);
1030 lustre_cfg_bufs_set_string(bufs, 1, new_param);
1031
1032 new_cfg = lustre_cfg_new(cfg->lcfg_command, bufs);
1033
1034 OBD_FREE(new_param, new_len);
1035 OBD_FREE_PTR(bufs);
1036 if (new_cfg == NULL)
0a3bdb00 1037 return ERR_PTR(-ENOMEM);
d7e09d03
PT		 1038
1039 new_cfg->lcfg_num = cfg->lcfg_num;
1040 new_cfg->lcfg_flags = cfg->lcfg_flags;
1041 new_cfg->lcfg_nid = cfg->lcfg_nid;
1042 new_cfg->lcfg_nal = cfg->lcfg_nal;
1043
0a3bdb00 1044 return new_cfg;
d7e09d03
PT		 1045}
1046EXPORT_SYMBOL(lustre_cfg_rename);
1047
7d4bae45
AB		 1048static int process_param2_config(struct lustre_cfg *lcfg)
1049{
1050 char *param = lustre_cfg_string(lcfg, 1);
1051 char *upcall = lustre_cfg_string(lcfg, 2);
1052 char *argv[] = {
1053 [0] = "/usr/sbin/lctl",
1054 [1] = "set_param",
1055 [2] = param,
1056 [3] = NULL
1057 };
1058 struct timeval start;
1059 struct timeval end;
1060 int rc;
1061
1062
1063 /* Add upcall processing here. Now only lctl is supported */
1064 if (strcmp(upcall, LCTL_UPCALL) != 0) {
1065 CERROR("Unsupported upcall %s\n", upcall);
1066 return -EINVAL;
1067 }
1068
1069 do_gettimeofday(&start);
46ffc934 1070 rc = call_usermodehelper(argv[0], argv, NULL, 1);
7d4bae45
AB		 1071 do_gettimeofday(&end);
1072
1073 if (rc < 0) {
1074 CERROR(
1075 "lctl: error invoking upcall %s %s %s: rc = %d; time %ldus\n",
1076 argv[0], argv[1], argv[2], rc,
1077 cfs_timeval_sub(&end, &start, NULL));
1078 } else {
1079 CDEBUG(D_HA, "lctl: invoked upcall %s %s %s, time %ldus\n",
1080 argv[0], argv[1], argv[2],
1081 cfs_timeval_sub(&end, &start, NULL));
1082 rc = 0;
1083 }
1084
1085 return rc;
1086}
1087
d7e09d03
PT		 1088void lustre_register_quota_process_config(int (*qpc)(struct lustre_cfg *lcfg))
1089{
1090 quota_process_config = qpc;
1091}
1092EXPORT_SYMBOL(lustre_register_quota_process_config);
1093
1094/** Process configuration commands given in lustre_cfg form.
1095 * These may come from direct calls (e.g. class_manual_cleanup)
1096 * or processing the config llog, or ioctl from lctl.
1097 */
1098int class_process_config(struct lustre_cfg *lcfg)
1099{
1100 struct obd_device *obd;
1101 int err;
1102
1103 LASSERT(lcfg && !IS_ERR(lcfg));
1104 CDEBUG(D_IOCTL, "processing cmd: %x\n", lcfg->lcfg_command);
1105
1106 /* Commands that don't need a device */
a58a38ac 1107 switch (lcfg->lcfg_command) {
d7e09d03
PT		 1108 case LCFG_ATTACH: {
1109 err = class_attach(lcfg);
d212afd9 1110 goto out;
d7e09d03
PT		 1111 }
1112 case LCFG_ADD_UUID: {
55f5a824
GKH		 1113 CDEBUG(D_IOCTL, "adding mapping from uuid %s to nid %#llx (%s)\n",
1114 lustre_cfg_string(lcfg, 1), lcfg->lcfg_nid,
1115 libcfs_nid2str(lcfg->lcfg_nid));
d7e09d03
PT		 1116
1117 err = class_add_uuid(lustre_cfg_string(lcfg, 1), lcfg->lcfg_nid);
d212afd9 1118 goto out;
d7e09d03
PT		 1119 }
1120 case LCFG_DEL_UUID: {
1121 CDEBUG(D_IOCTL, "removing mappings for uuid %s\n",
1122 (lcfg->lcfg_bufcount < 2 || LUSTRE_CFG_BUFLEN(lcfg, 1) == 0)
1123 ? "<all uuids>" : lustre_cfg_string(lcfg, 1));
1124
1125 err = class_del_uuid(lustre_cfg_string(lcfg, 1));
d212afd9 1126 goto out;
d7e09d03
PT		 1127 }
1128 case LCFG_MOUNTOPT: {
1129 CDEBUG(D_IOCTL, "mountopt: profile %s osc %s mdc %s\n",
1130 lustre_cfg_string(lcfg, 1),
1131 lustre_cfg_string(lcfg, 2),
1132 lustre_cfg_string(lcfg, 3));
1133 /* set these mount options somewhere, so ll_fill_super
1134 * can find them. */
1135 err = class_add_profile(LUSTRE_CFG_BUFLEN(lcfg, 1),
1136 lustre_cfg_string(lcfg, 1),
1137 LUSTRE_CFG_BUFLEN(lcfg, 2),
1138 lustre_cfg_string(lcfg, 2),
1139 LUSTRE_CFG_BUFLEN(lcfg, 3),
1140 lustre_cfg_string(lcfg, 3));
d212afd9 1141 goto out;
d7e09d03
PT		 1142 }
1143 case LCFG_DEL_MOUNTOPT: {
1144 CDEBUG(D_IOCTL, "mountopt: profile %s\n",
1145 lustre_cfg_string(lcfg, 1));
1146 class_del_profile(lustre_cfg_string(lcfg, 1));
d212afd9
JL		 1147 err = 0;
1148 goto out;
d7e09d03
PT		 1149 }
1150 case LCFG_SET_TIMEOUT: {
1151 CDEBUG(D_IOCTL, "changing lustre timeout from %d to %d\n",
1152 obd_timeout, lcfg->lcfg_num);
1153 obd_timeout = max(lcfg->lcfg_num, 1U);
1154 obd_timeout_set = 1;
d212afd9
JL		 1155 err = 0;
1156 goto out;
d7e09d03
PT		 1157 }
1158 case LCFG_SET_LDLM_TIMEOUT: {
1159 CDEBUG(D_IOCTL, "changing lustre ldlm_timeout from %d to %d\n",
1160 ldlm_timeout, lcfg->lcfg_num);
1161 ldlm_timeout = max(lcfg->lcfg_num, 1U);
1162 if (ldlm_timeout >= obd_timeout)
1163 ldlm_timeout = max(obd_timeout / 3, 1U);
1164 ldlm_timeout_set = 1;
d212afd9
JL		 1165 err = 0;
1166 goto out;
d7e09d03
PT		 1167 }
1168 case LCFG_SET_UPCALL: {
1169 LCONSOLE_ERROR_MSG(0x15a, "recovery upcall is deprecated\n");
1170 /* COMPAT_146 Don't fail on old configs */
d212afd9
JL		 1171 err = 0;
1172 goto out;
d7e09d03
PT		 1173 }
1174 case LCFG_MARKER: {
1175 struct cfg_marker *marker;
1176 marker = lustre_cfg_buf(lcfg, 1);
1177 CDEBUG(D_IOCTL, "marker %d (%#x) %.16s %s\n", marker->cm_step,
1178 marker->cm_flags, marker->cm_tgtname, marker->cm_comment);
d212afd9
JL		 1179 err = 0;
1180 goto out;
d7e09d03
PT		 1181 }
1182 case LCFG_PARAM: {
1183 char *tmp;
1184 /* llite has no obd */
1185 if ((class_match_param(lustre_cfg_string(lcfg, 1),
ea7893bb 1186 PARAM_LLITE, NULL) == 0) &&
d7e09d03
PT		 1187 client_process_config) {
1188 err = (*client_process_config)(lcfg);
d212afd9 1189 goto out;
d7e09d03
PT		 1190 } else if ((class_match_param(lustre_cfg_string(lcfg, 1),
1191 PARAM_SYS, &tmp) == 0)) {
1192 /* Global param settings */
1193 err = class_set_global(tmp, lcfg->lcfg_num, lcfg);
1194 /*
1195 * Client or server should not fail to mount if
1196 * it hits an unknown configuration parameter.
1197 */
1198 if (err != 0)
1199 CWARN("Ignoring unknown param %s\n", tmp);
1200
d212afd9
JL		 1201 err = 0;
1202 goto out;
d7e09d03
PT		 1203 } else if ((class_match_param(lustre_cfg_string(lcfg, 1),
1204 PARAM_QUOTA, &tmp) == 0) &&
1205 quota_process_config) {
1206 err = (*quota_process_config)(lcfg);
d212afd9 1207 goto out;
d7e09d03 1208 }
7d4bae45 1209
d7e09d03
PT		 1210 break;
1211 }
7d4bae45
AB		 1212 case LCFG_SET_PARAM: {
1213 err = process_param2_config(lcfg);
d212afd9 1214 goto out;
7d4bae45 1215 }
d7e09d03 1216 }
d7e09d03
PT		 1217 /* Commands that require a device */
1218 obd = class_name2obd(lustre_cfg_string(lcfg, 0));
1219 if (obd == NULL) {
1220 if (!LUSTRE_CFG_BUFLEN(lcfg, 0))
1221 CERROR("this lcfg command requires a device name\n");
1222 else
1223 CERROR("no device for: %s\n",
1224 lustre_cfg_string(lcfg, 0));
1225
d212afd9
JL		 1226 err = -EINVAL;
1227 goto out;
d7e09d03
PT		 1228 }
1229
a58a38ac 1230 switch (lcfg->lcfg_command) {
d7e09d03
PT		 1231 case LCFG_SETUP: {
1232 err = class_setup(obd, lcfg);
d212afd9 1233 goto out;
d7e09d03
PT		 1234 }
1235 case LCFG_DETACH: {
1236 err = class_detach(obd, lcfg);
d212afd9
JL		 1237 err = 0;
1238 goto out;
d7e09d03
PT		 1239 }
1240 case LCFG_CLEANUP: {
1241 err = class_cleanup(obd, lcfg);
d212afd9
JL		 1242 err = 0;
1243 goto out;
d7e09d03
PT		 1244 }
1245 case LCFG_ADD_CONN: {
1246 err = class_add_conn(obd, lcfg);
d212afd9
JL		 1247 err = 0;
1248 goto out;
d7e09d03
PT		 1249 }
1250 case LCFG_DEL_CONN: {
1251 err = class_del_conn(obd, lcfg);
d212afd9
JL		 1252 err = 0;
1253 goto out;
d7e09d03
PT		 1254 }
1255 case LCFG_POOL_NEW: {
1256 err = obd_pool_new(obd, lustre_cfg_string(lcfg, 2));
55df5fad
JL		 1257 err = 0;
1258 goto out;
d7e09d03
PT		 1259 }
1260 case LCFG_POOL_ADD: {
1261 err = obd_pool_add(obd, lustre_cfg_string(lcfg, 2),
1262 lustre_cfg_string(lcfg, 3));
55df5fad
JL		 1263 err = 0;
1264 goto out;
d7e09d03
PT		 1265 }
1266 case LCFG_POOL_REM: {
1267 err = obd_pool_rem(obd, lustre_cfg_string(lcfg, 2),
1268 lustre_cfg_string(lcfg, 3));
55df5fad
JL		 1269 err = 0;
1270 goto out;
d7e09d03
PT		 1271 }
1272 case LCFG_POOL_DEL: {
1273 err = obd_pool_del(obd, lustre_cfg_string(lcfg, 2));
55df5fad
JL		 1274 err = 0;
1275 goto out;
d7e09d03
PT		 1276 }
1277 default: {
1278 err = obd_process_config(obd, sizeof(*lcfg), lcfg);
d212afd9 1279 goto out;
d7e09d03
PT		 1280
1281 }
1282 }
1283out:
1284 if ((err < 0) && !(lcfg->lcfg_command & LCFG_REQUIRED)) {
1285 CWARN("Ignoring error %d on optional command %#x\n", err,
1286 lcfg->lcfg_command);
1287 err = 0;
1288 }
1289 return err;
1290}
1291EXPORT_SYMBOL(class_process_config);
1292
1293int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
1294 struct lustre_cfg *lcfg, void *data)
1295{
1296 struct lprocfs_vars *var;
73bb1da6
PT		 1297 struct file fakefile;
1298 struct seq_file fake_seqfile;
d7e09d03
PT		 1299 char *key, *sval;
1300 int i, keylen, vallen;
1301 int matched = 0, j = 0;
1302 int rc = 0;
1303 int skip = 0;
d7e09d03
PT		 1304
1305 if (lcfg->lcfg_command != LCFG_PARAM) {
1306 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
0a3bdb00 1307 return -EINVAL;
d7e09d03
PT		 1308 }
1309
73bb1da6
PT		 1310 /* fake a seq file so that var->fops->write can work... */
1311 fakefile.private_data = &fake_seqfile;
1312 fake_seqfile.private = data;
d7e09d03
PT		 1313 /* e.g. tunefs.lustre --param mdt.group_upcall=foo /r/tmp/lustre-mdt
1314 or lctl conf_param lustre-MDT0000.mdt.group_upcall=bar
1315 or lctl conf_param lustre-OST0000.osc.max_dirty_mb=36 */
1316 for (i = 1; i < lcfg->lcfg_bufcount; i++) {
1317 key = lustre_cfg_buf(lcfg, i);
1318 /* Strip off prefix */
1319 class_match_param(key, prefix, &key);
1320 sval = strchr(key, '=');
1321 if (!sval || (*(sval + 1) == 0)) {
1322 CERROR("Can't parse param %s (missing '=')\n", key);
1323 /* rc = -EINVAL; continue parsing other params */
1324 continue;
1325 }
1326 keylen = sval - key;
1327 sval++;
1328 vallen = strlen(sval);
1329 matched = 0;
1330 j = 0;
1331 /* Search proc entries */
1332 while (lvars[j].name) {
1333 var = &lvars[j];
ea7893bb
RD		 1334 if (class_match_param(key, (char *)var->name, NULL) == 0
1335 && keylen == strlen(var->name)) {
d7e09d03
PT		 1336 matched++;
1337 rc = -EROFS;
73bb1da6 1338 if (var->fops && var->fops->write) {
d7e09d03
PT		 1339 mm_segment_t oldfs;
1340 oldfs = get_fs();
1341 set_fs(KERNEL_DS);
73bb1da6
PT		 1342 rc = (var->fops->write)(&fakefile, sval,
1343 vallen, NULL);
d7e09d03
PT		 1344 set_fs(oldfs);
1345 }
1346 break;
1347 }
1348 j++;
1349 }
1350 if (!matched) {
1351 /* If the prefix doesn't match, return error so we
1352 can pass it down the stack */
1353 if (strnchr(key, keylen, '.'))
0a3bdb00 1354 return -ENOSYS;
d7e09d03
PT		 1355 CERROR("%s: unknown param %s\n",
1356 (char *)lustre_cfg_string(lcfg, 0), key);
1357 /* rc = -EINVAL; continue parsing other params */
1358 skip++;
1359 } else if (rc < 0) {
1360 CERROR("writing proc entry %s err %d\n",
1361 var->name, rc);
1362 rc = 0;
1363 } else {
1364 CDEBUG(D_CONFIG, "%s.%.*s: Set parameter %.*s=%s\n",
1365 lustre_cfg_string(lcfg, 0),
1366 (int)strlen(prefix) - 1, prefix,
1367 (int)(sval - key - 1), key, sval);
1368 }
1369 }
1370
1371 if (rc > 0)
1372 rc = 0;
1373 if (!rc && skip)
1374 rc = skip;
0a3bdb00 1375 return rc;
d7e09d03
PT		 1376}
1377EXPORT_SYMBOL(class_process_proc_param);
1378
1379extern int lustre_check_exclusion(struct super_block *sb, char *svname);
1380
1381/** Parse a configuration llog, doing various manipulations on them
1382 * for various reasons, (modifications for compatibility, skip obsolete
1383 * records, change uuids, etc), then class_process_config() resulting
1384 * net records.
1385 */
1386int class_config_llog_handler(const struct lu_env *env,
1387 struct llog_handle *handle,
1388 struct llog_rec_hdr *rec, void *data)
1389{
1390 struct config_llog_instance *clli = data;
1391 int cfg_len = rec->lrh_len;
bdbb0512 1392 char *cfg_buf = (char *) (rec + 1);
d7e09d03 1393 int rc = 0;
d7e09d03
PT		 1394
1395 //class_config_dump_handler(handle, rec, data);
1396
1397 switch (rec->lrh_type) {
1398 case OBD_CFG_REC: {
1399 struct lustre_cfg *lcfg, *lcfg_new;
1400 struct lustre_cfg_bufs bufs;
1401 char *inst_name = NULL;
1402 int inst_len = 0;
1403 int inst = 0, swab = 0;
1404
1405 lcfg = (struct lustre_cfg *)cfg_buf;
1406 if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION)) {
1407 lustre_swab_lustre_cfg(lcfg);
1408 swab = 1;
1409 }
1410
1411 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1412 if (rc)
d212afd9 1413 goto out;
d7e09d03
PT		 1414
1415 /* Figure out config state info */
1416 if (lcfg->lcfg_command == LCFG_MARKER) {
1417 struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1418 lustre_swab_cfg_marker(marker, swab,
1419 LUSTRE_CFG_BUFLEN(lcfg, 1));
1420 CDEBUG(D_CONFIG, "Marker, inst_flg=%#x mark_flg=%#x\n",
1421 clli->cfg_flags, marker->cm_flags);
1422 if (marker->cm_flags & CM_START) {
1423 /* all previous flags off */
1424 clli->cfg_flags = CFG_F_MARKER;
1425 if (marker->cm_flags & CM_SKIP) {
1426 clli->cfg_flags |= CFG_F_SKIP;
1427 CDEBUG(D_CONFIG, "SKIP #%d\n",
1428 marker->cm_step);
1429 } else if ((marker->cm_flags & CM_EXCLUDE) ||
1430 (clli->cfg_sb &&
1431 lustre_check_exclusion(clli->cfg_sb,
1432 marker->cm_tgtname))) {
1433 clli->cfg_flags |= CFG_F_EXCLUDE;
1434 CDEBUG(D_CONFIG, "EXCLUDE %d\n",
1435 marker->cm_step);
1436 }
1437 } else if (marker->cm_flags & CM_END) {
1438 clli->cfg_flags = 0;
1439 }
1440 }
1441 /* A config command without a start marker before it is
1442 illegal (post 146) */
1443 if (!(clli->cfg_flags & CFG_F_COMPAT146) &&
1444 !(clli->cfg_flags & CFG_F_MARKER) &&
1445 (lcfg->lcfg_command != LCFG_MARKER)) {
2d00bd17 1446 CWARN("Config not inside markers, ignoring! (inst: %p, uuid: %s, flags: %#x)\n",
d7e09d03
PT		 1447 clli->cfg_instance,
1448 clli->cfg_uuid.uuid, clli->cfg_flags);
1449 clli->cfg_flags |= CFG_F_SKIP;
1450 }
1451 if (clli->cfg_flags & CFG_F_SKIP) {
1452 CDEBUG(D_CONFIG, "skipping %#x\n",
1453 clli->cfg_flags);
1454 rc = 0;
1455 /* No processing! */
1456 break;
1457 }
1458
1459 /*
1460 * For interoperability between 1.8 and 2.0,
1461 * rename "mds" obd device type to "mdt".
1462 */
1463 {
1464 char *typename = lustre_cfg_string(lcfg, 1);
1465 char *index = lustre_cfg_string(lcfg, 2);
1466
1467 if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
1468 strcmp(typename, "mds") == 0)) {
2d00bd17 1469 CWARN("For 1.8 interoperability, rename obd type from mds to mdt\n");
d7e09d03
PT		 1470 typename[2] = 't';
1471 }
1472 if ((lcfg->lcfg_command == LCFG_SETUP && index &&
1473 strcmp(index, "type") == 0)) {
2d00bd17 1474 CDEBUG(D_INFO, "For 1.8 interoperability, set this index to '0'\n");
d7e09d03
PT		 1475 index[0] = '0';
1476 index[1] = 0;
1477 }
1478 }
1479
1480
f1b58c5a
NC		 1481 if (clli->cfg_flags & CFG_F_EXCLUDE) {
1482 CDEBUG(D_CONFIG, "cmd: %x marked EXCLUDED\n",
1483 lcfg->lcfg_command);
1484 if (lcfg->lcfg_command == LCFG_LOV_ADD_OBD)
1485 /* Add inactive instead */
1486 lcfg->lcfg_command = LCFG_LOV_ADD_INA;
1487 }
d7e09d03
PT		 1488
1489 lustre_cfg_bufs_init(&bufs, lcfg);
1490
1491 if (clli && clli->cfg_instance &&
1492 LUSTRE_CFG_BUFLEN(lcfg, 0) > 0){
1493 inst = 1;
1494 inst_len = LUSTRE_CFG_BUFLEN(lcfg, 0) +
1495 sizeof(clli->cfg_instance) * 2 + 4;
1496 OBD_ALLOC(inst_name, inst_len);
d212afd9
JL		 1497 if (inst_name == NULL) {
1498 rc = -ENOMEM;
1499 goto out;
1500 }
d7e09d03
PT		 1501 sprintf(inst_name, "%s-%p",
1502 lustre_cfg_string(lcfg, 0),
1503 clli->cfg_instance);
1504 lustre_cfg_bufs_set_string(&bufs, 0, inst_name);
1505 CDEBUG(D_CONFIG, "cmd %x, instance name: %s\n",
1506 lcfg->lcfg_command, inst_name);
1507 }
1508
1509 /* we override the llog's uuid for clients, to insure they
1510 are unique */
1511 if (clli && clli->cfg_instance != NULL &&
1512 lcfg->lcfg_command == LCFG_ATTACH) {
1513 lustre_cfg_bufs_set_string(&bufs, 2,
1514 clli->cfg_uuid.uuid);
1515 }
1516 /*
1517 * sptlrpc config record, we expect 2 data segments:
1518 * [0]: fs_name/target_name,
1519 * [1]: rule string
1520 * moving them to index [1] and [2], and insert MGC's
1521 * obdname at index [0].
1522 */
1523 if (clli && clli->cfg_instance == NULL &&
1524 lcfg->lcfg_command == LCFG_SPTLRPC_CONF) {
1525 lustre_cfg_bufs_set(&bufs, 2, bufs.lcfg_buf[1],
1526 bufs.lcfg_buflen[1]);
1527 lustre_cfg_bufs_set(&bufs, 1, bufs.lcfg_buf[0],
1528 bufs.lcfg_buflen[0]);
1529 lustre_cfg_bufs_set_string(&bufs, 0,
1530 clli->cfg_obdname);
1531 }
1532
1533 lcfg_new = lustre_cfg_new(lcfg->lcfg_command, &bufs);
1534
1535 lcfg_new->lcfg_num = lcfg->lcfg_num;
1536 lcfg_new->lcfg_flags = lcfg->lcfg_flags;
1537
1538 /* XXX Hack to try to remain binary compatible with
1539 * pre-newconfig logs */
1540 if (lcfg->lcfg_nal != 0 && /* pre-newconfig log? */
1541 (lcfg->lcfg_nid >> 32) == 0) {
1542 __u32 addr = (__u32)(lcfg->lcfg_nid & 0xffffffff);
1543
1544 lcfg_new->lcfg_nid =
1545 LNET_MKNID(LNET_MKNET(lcfg->lcfg_nal, 0), addr);
1546 CWARN("Converted pre-newconfig NAL %d NID %x to %s\n",
1547 lcfg->lcfg_nal, addr,
1548 libcfs_nid2str(lcfg_new->lcfg_nid));
1549 } else {
1550 lcfg_new->lcfg_nid = lcfg->lcfg_nid;
1551 }
1552
1553 lcfg_new->lcfg_nal = 0; /* illegal value for obsolete field */
1554
1555 rc = class_process_config(lcfg_new);
1556 lustre_cfg_free(lcfg_new);
1557
1558 if (inst)
1559 OBD_FREE(inst_name, inst_len);
1560 break;
1561 }
1562 default:
1563 CERROR("Unknown llog record type %#x encountered\n",
1564 rec->lrh_type);
1565 break;
1566 }
1567out:
1568 if (rc) {
1569 CERROR("%s: cfg command failed: rc = %d\n",
1570 handle->lgh_ctxt->loc_obd->obd_name, rc);
1571 class_config_dump_handler(NULL, handle, rec, data);
1572 }
0a3bdb00 1573 return rc;
d7e09d03
PT		 1574}
1575EXPORT_SYMBOL(class_config_llog_handler);
1576
1577int class_config_parse_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
1578 char *name, struct config_llog_instance *cfg)
1579{
1580 struct llog_process_cat_data cd = {0, 0};
1581 struct llog_handle *llh;
1582 llog_cb_t callback;
1583 int rc;
d7e09d03
PT		 1584
1585 CDEBUG(D_INFO, "looking up llog %s\n", name);
1586 rc = llog_open(env, ctxt, &llh, NULL, name, LLOG_OPEN_EXISTS);
1587 if (rc)
0a3bdb00 1588 return rc;
d7e09d03
PT		 1589
1590 rc = llog_init_handle(env, llh, LLOG_F_IS_PLAIN, NULL);
1591 if (rc)
d212afd9 1592 goto parse_out;
d7e09d03
PT		 1593
1594 /* continue processing from where we last stopped to end-of-log */
1595 if (cfg) {
1596 cd.lpcd_first_idx = cfg->cfg_last_idx;
1597 callback = cfg->cfg_callback;
1598 LASSERT(callback != NULL);
1599 } else {
1600 callback = class_config_llog_handler;
1601 }
1602
1603 cd.lpcd_last_idx = 0;
1604
1605 rc = llog_process(env, llh, callback, cfg, &cd);
1606
1607 CDEBUG(D_CONFIG, "Processed log %s gen %d-%d (rc=%d)\n", name,
1608 cd.lpcd_first_idx + 1, cd.lpcd_last_idx, rc);
1609 if (cfg)
1610 cfg->cfg_last_idx = cd.lpcd_last_idx;
1611
1612parse_out:
1613 llog_close(env, llh);
0a3bdb00 1614 return rc;
d7e09d03
PT		 1615}
1616EXPORT_SYMBOL(class_config_parse_llog);
1617
1618/**
1619 * parse config record and output dump in supplied buffer.
1620 * This is separated from class_config_dump_handler() to use
1621 * for ioctl needs as well
1622 */
1623int class_config_parse_rec(struct llog_rec_hdr *rec, char *buf, int size)
1624{
1625 struct lustre_cfg *lcfg = (struct lustre_cfg *)(rec + 1);
1626 char *ptr = buf;
1627 char *end = buf + size;
1628 int rc = 0;
1629
d7e09d03
PT		 1630 LASSERT(rec->lrh_type == OBD_CFG_REC);
1631 rc = lustre_cfg_sanity_check(lcfg, rec->lrh_len);
1632 if (rc < 0)
0a3bdb00 1633 return rc;
d7e09d03
PT		 1634
1635 ptr += snprintf(ptr, end-ptr, "cmd=%05x ", lcfg->lcfg_command);
1636 if (lcfg->lcfg_flags)
1637 ptr += snprintf(ptr, end-ptr, "flags=%#08x ",
1638 lcfg->lcfg_flags);
1639
1640 if (lcfg->lcfg_num)
1641 ptr += snprintf(ptr, end-ptr, "num=%#08x ", lcfg->lcfg_num);
1642
1643 if (lcfg->lcfg_nid)
55f5a824 1644 ptr += snprintf(ptr, end-ptr, "nid=%s(%#llx)\n ",
d7e09d03
PT		 1645 libcfs_nid2str(lcfg->lcfg_nid),
1646 lcfg->lcfg_nid);
1647
1648 if (lcfg->lcfg_command == LCFG_MARKER) {
1649 struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1650
1651 ptr += snprintf(ptr, end-ptr, "marker=%d(%#x)%s '%s'",
1652 marker->cm_step, marker->cm_flags,
1653 marker->cm_tgtname, marker->cm_comment);
1654 } else {
1655 int i;
1656
1657 for (i = 0; i < lcfg->lcfg_bufcount; i++) {
1658 ptr += snprintf(ptr, end-ptr, "%d:%s ", i,
1659 lustre_cfg_string(lcfg, i));
1660 }
1661 }
1662 /* return consumed bytes */
1663 rc = ptr - buf;
0a3bdb00 1664 return rc;
d7e09d03
PT		 1665}
1666
1667int class_config_dump_handler(const struct lu_env *env,
1668 struct llog_handle *handle,
1669 struct llog_rec_hdr *rec, void *data)
1670{
1671 char *outstr;
1672 int rc = 0;
1673
d7e09d03
PT		 1674 OBD_ALLOC(outstr, 256);
1675 if (outstr == NULL)
0a3bdb00 1676 return -ENOMEM;
d7e09d03
PT		 1677
1678 if (rec->lrh_type == OBD_CFG_REC) {
1679 class_config_parse_rec(rec, outstr, 256);
1680 LCONSOLE(D_WARNING, " %s\n", outstr);
1681 } else {
1682 LCONSOLE(D_WARNING, "unhandled lrh_type: %#x\n", rec->lrh_type);
1683 rc = -EINVAL;
1684 }
1685
1686 OBD_FREE(outstr, 256);
0a3bdb00 1687 return rc;
d7e09d03
PT		 1688}
1689
1690int class_config_dump_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
1691 char *name, struct config_llog_instance *cfg)
1692{
1693 struct llog_handle *llh;
1694 int rc;
1695
d7e09d03
PT		 1696 LCONSOLE_INFO("Dumping config log %s\n", name);
1697
1698 rc = llog_open(env, ctxt, &llh, NULL, name, LLOG_OPEN_EXISTS);
1699 if (rc)
0a3bdb00 1700 return rc;
d7e09d03
PT		 1701
1702 rc = llog_init_handle(env, llh, LLOG_F_IS_PLAIN, NULL);
1703 if (rc)
d212afd9 1704 goto parse_out;
d7e09d03
PT		 1705
1706 rc = llog_process(env, llh, class_config_dump_handler, cfg, NULL);
1707parse_out:
1708 llog_close(env, llh);
1709
1710 LCONSOLE_INFO("End config log %s\n", name);
0a3bdb00 1711 return rc;
d7e09d03
PT		 1712}
1713EXPORT_SYMBOL(class_config_dump_llog);
1714
1715/** Call class_cleanup and class_detach.
1716 * "Manual" only in the sense that we're faking lcfg commands.
1717 */
1718int class_manual_cleanup(struct obd_device *obd)
1719{
1720 char flags[3] = "";
1721 struct lustre_cfg *lcfg;
1722 struct lustre_cfg_bufs bufs;
1723 int rc;
d7e09d03
PT		 1724
1725 if (!obd) {
1726 CERROR("empty cleanup\n");
0a3bdb00 1727 return -EALREADY;
d7e09d03
PT		 1728 }
1729
1730 if (obd->obd_force)
1731 strcat(flags, "F");
1732 if (obd->obd_fail)
1733 strcat(flags, "A");
1734
1735 CDEBUG(D_CONFIG, "Manual cleanup of %s (flags='%s')\n",
1736 obd->obd_name, flags);
1737
1738 lustre_cfg_bufs_reset(&bufs, obd->obd_name);
1739 lustre_cfg_bufs_set_string(&bufs, 1, flags);
1740 lcfg = lustre_cfg_new(LCFG_CLEANUP, &bufs);
1741 if (!lcfg)
0a3bdb00 1742 return -ENOMEM;
d7e09d03
PT		 1743
1744 rc = class_process_config(lcfg);
1745 if (rc) {
1746 CERROR("cleanup failed %d: %s\n", rc, obd->obd_name);
d212afd9 1747 goto out;
d7e09d03
PT		 1748 }
1749
1750 /* the lcfg is almost the same for both ops */
1751 lcfg->lcfg_command = LCFG_DETACH;
1752 rc = class_process_config(lcfg);
1753 if (rc)
1754 CERROR("detach failed %d: %s\n", rc, obd->obd_name);
1755out:
1756 lustre_cfg_free(lcfg);
0a3bdb00 1757 return rc;
d7e09d03
PT		 1758}
1759EXPORT_SYMBOL(class_manual_cleanup);
1760
1761/*
1762 * uuid<->export lustre hash operations
1763 */
1764
1765static unsigned
6da6eabe 1766uuid_hash(struct cfs_hash *hs, const void *key, unsigned mask)
d7e09d03
PT		 1767{
1768 return cfs_hash_djb2_hash(((struct obd_uuid *)key)->uuid,
1769 sizeof(((struct obd_uuid *)key)->uuid), mask);
1770}
1771
1772static void *
1773uuid_key(struct hlist_node *hnode)
1774{
1775 struct obd_export *exp;
1776
1777 exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1778
1779 return &exp->exp_client_uuid;
1780}
1781
1782/*
1783 * NOTE: It is impossible to find an export that is in failed
1784 * state with this function
1785 */
1786static int
1787uuid_keycmp(const void *key, struct hlist_node *hnode)
1788{
1789 struct obd_export *exp;
1790
1791 LASSERT(key);
1792 exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1793
1794 return obd_uuid_equals(key, &exp->exp_client_uuid) &&
1795 !exp->exp_failed;
1796}
1797
1798static void *
1799uuid_export_object(struct hlist_node *hnode)
1800{
1801 return hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1802}
1803
1804static void
6da6eabe 1805uuid_export_get(struct cfs_hash *hs, struct hlist_node *hnode)
d7e09d03
PT		 1806{
1807 struct obd_export *exp;
1808
1809 exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1810 class_export_get(exp);
1811}
1812
1813static void
6da6eabe 1814uuid_export_put_locked(struct cfs_hash *hs, struct hlist_node *hnode)
d7e09d03
PT		 1815{
1816 struct obd_export *exp;
1817
1818 exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1819 class_export_put(exp);
1820}
1821
1822static cfs_hash_ops_t uuid_hash_ops = {
1823 .hs_hash = uuid_hash,
1824 .hs_key = uuid_key,
1825 .hs_keycmp = uuid_keycmp,
1826 .hs_object = uuid_export_object,
1827 .hs_get = uuid_export_get,
1828 .hs_put_locked = uuid_export_put_locked,
1829};
1830
1831
1832/*
1833 * nid<->export hash operations
1834 */
1835
1836static unsigned
6da6eabe 1837nid_hash(struct cfs_hash *hs, const void *key, unsigned mask)
d7e09d03
PT		 1838{
1839 return cfs_hash_djb2_hash(key, sizeof(lnet_nid_t), mask);
1840}
1841
1842static void *
1843nid_key(struct hlist_node *hnode)
1844{
1845 struct obd_export *exp;
1846
1847 exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1848
0a3bdb00 1849 return &exp->exp_connection->c_peer.nid;
d7e09d03
PT		 1850}
1851
1852/*
1853 * NOTE: It is impossible to find an export that is in failed
1854 * state with this function
1855 */
1856static int
1857nid_kepcmp(const void *key, struct hlist_node *hnode)
1858{
1859 struct obd_export *exp;
1860
1861 LASSERT(key);
1862 exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1863
0a3bdb00
GKH		 1864 return exp->exp_connection->c_peer.nid == *(lnet_nid_t *)key &&
1865 !exp->exp_failed;
d7e09d03
PT		 1866}
1867
1868static void *
1869nid_export_object(struct hlist_node *hnode)
1870{
1871 return hlist_entry(hnode, struct obd_export, exp_nid_hash);
1872}
1873
1874static void
6da6eabe 1875nid_export_get(struct cfs_hash *hs, struct hlist_node *hnode)
d7e09d03
PT		 1876{
1877 struct obd_export *exp;
1878
1879 exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1880 class_export_get(exp);
1881}
1882
1883static void
6da6eabe 1884nid_export_put_locked(struct cfs_hash *hs, struct hlist_node *hnode)
d7e09d03
PT		 1885{
1886 struct obd_export *exp;
1887
1888 exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1889 class_export_put(exp);
1890}
1891
1892static cfs_hash_ops_t nid_hash_ops = {
1893 .hs_hash = nid_hash,
1894 .hs_key = nid_key,
1895 .hs_keycmp = nid_kepcmp,
1896 .hs_object = nid_export_object,
1897 .hs_get = nid_export_get,
1898 .hs_put_locked = nid_export_put_locked,
1899};
1900
1901
1902/*
1903 * nid<->nidstats hash operations
1904 */
1905
1906static void *
1907nidstats_key(struct hlist_node *hnode)
1908{
1909 struct nid_stat *ns;
1910
1911 ns = hlist_entry(hnode, struct nid_stat, nid_hash);
1912
1913 return &ns->nid;
1914}
1915
1916static int
1917nidstats_keycmp(const void *key, struct hlist_node *hnode)
1918{
1919 return *(lnet_nid_t *)nidstats_key(hnode) == *(lnet_nid_t *)key;
1920}
1921
1922static void *
1923nidstats_object(struct hlist_node *hnode)
1924{
1925 return hlist_entry(hnode, struct nid_stat, nid_hash);
1926}
1927
1928static void
6da6eabe 1929nidstats_get(struct cfs_hash *hs, struct hlist_node *hnode)
d7e09d03
PT		 1930{
1931 struct nid_stat *ns;
1932
1933 ns = hlist_entry(hnode, struct nid_stat, nid_hash);
1934 nidstat_getref(ns);
1935}
1936
1937static void
6da6eabe 1938nidstats_put_locked(struct cfs_hash *hs, struct hlist_node *hnode)
d7e09d03
PT		 1939{
1940 struct nid_stat *ns;
1941
1942 ns = hlist_entry(hnode, struct nid_stat, nid_hash);
1943 nidstat_putref(ns);
1944}
1945
1946static cfs_hash_ops_t nid_stat_hash_ops = {
1947 .hs_hash = nid_hash,
1948 .hs_key = nidstats_key,
1949 .hs_keycmp = nidstats_keycmp,
1950 .hs_object = nidstats_object,
1951 .hs_get = nidstats_get,
1952 .hs_put_locked = nidstats_put_locked,
1953};
Linux 6.x block layer and io_uring tree(s)