4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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.
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).
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
23 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2014, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * lustre/obdclass/lprocfs_status_server.c
35 #define DEBUG_SUBSYSTEM S_CLASS
38 #include <obd_class.h>
39 #include <lprocfs_status.h>
40 #include <lustre/lustre_idl.h>
41 #include <lustre_nodemap.h>
45 int lprocfs_evict_client_open(struct inode *inode, struct file *f)
47 struct obd_device *obd = PDE_DATA(f->f_path.dentry->d_inode);
49 atomic_inc(&obd->obd_evict_inprogress);
53 int lprocfs_evict_client_release(struct inode *inode, struct file *f)
55 struct obd_device *obd = PDE_DATA(f->f_path.dentry->d_inode);
57 atomic_dec(&obd->obd_evict_inprogress);
58 wake_up(&obd->obd_evict_inprogress_waitq);
63 #define BUFLEN (UUID_MAX + 5)
66 lprocfs_evict_client_seq_write(struct file *file, const char *buffer,
67 size_t count, loff_t *off)
69 struct seq_file *m = file->private_data;
70 struct obd_device *obd = m->private;
73 OBD_ALLOC(kbuf, BUFLEN);
78 * OBD_ALLOC() will zero kbuf, but we only copy BUFLEN - 1
79 * bytes into kbuf, to ensure that the string is NUL-terminated.
80 * UUID_MAX should include a trailing NUL already.
82 if (copy_from_user(kbuf, buffer,
83 min_t(unsigned long, BUFLEN - 1, count))) {
87 tmpbuf = cfs_firststr(kbuf, min_t(unsigned long, BUFLEN - 1, count));
88 class_incref(obd, __func__, current);
90 if (strncmp(tmpbuf, "nid:", 4) == 0)
91 obd_export_evict_by_nid(obd, tmpbuf + 4);
92 else if (strncmp(tmpbuf, "uuid:", 5) == 0)
93 obd_export_evict_by_uuid(obd, tmpbuf + 5);
95 obd_export_evict_by_uuid(obd, tmpbuf);
97 class_decref(obd, __func__, current);
100 OBD_FREE(kbuf, BUFLEN);
103 EXPORT_SYMBOL(lprocfs_evict_client_seq_write);
107 int lprocfs_num_exports_seq_show(struct seq_file *m, void *data)
109 struct obd_device *obd = data;
111 LASSERT(obd != NULL);
112 return seq_printf(m, "%u\n", obd->obd_num_exports);
114 EXPORT_SYMBOL(lprocfs_num_exports_seq_show);
116 static void lprocfs_free_client_stats(struct nid_stat *client_stat)
118 CDEBUG(D_CONFIG, "stat %p - data %p/%p\n", client_stat,
119 client_stat->nid_proc, client_stat->nid_stats);
121 LASSERTF(atomic_read(&client_stat->nid_exp_ref_count) == 0,
122 "nid %s:count %d\n", libcfs_nid2str(client_stat->nid),
123 atomic_read(&client_stat->nid_exp_ref_count));
125 if (client_stat->nid_proc)
126 lprocfs_remove(&client_stat->nid_proc);
128 if (client_stat->nid_stats)
129 lprocfs_free_stats(&client_stat->nid_stats);
131 if (client_stat->nid_ldlm_stats)
132 lprocfs_free_stats(&client_stat->nid_ldlm_stats);
134 OBD_FREE_PTR(client_stat);
138 void lprocfs_free_per_client_stats(struct obd_device *obd)
140 struct cfs_hash *hash = obd->obd_nid_stats_hash;
141 struct nid_stat *stat;
144 /* we need extra list - because hash_exit called to early */
145 /* not need locking because all clients is died */
146 while (!list_empty(&obd->obd_nid_stats)) {
147 stat = list_entry(obd->obd_nid_stats.next,
148 struct nid_stat, nid_list);
149 list_del_init(&stat->nid_list);
150 cfs_hash_del(hash, &stat->nid, &stat->nid_hash);
151 lprocfs_free_client_stats(stat);
155 EXPORT_SYMBOL(lprocfs_free_per_client_stats);
158 lprocfs_exp_print_uuid_seq(struct cfs_hash *hs, struct cfs_hash_bd *bd,
159 struct hlist_node *hnode, void *cb_data)
161 struct seq_file *m = cb_data;
162 struct obd_export *exp = cfs_hash_object(hs, hnode);
164 if (exp->exp_nid_stats != NULL)
165 seq_printf(m, "%s\n", obd_uuid2str(&exp->exp_client_uuid));
170 lprocfs_exp_print_nodemap_seq(struct cfs_hash *hs, struct cfs_hash_bd *bd,
171 struct hlist_node *hnode, void *cb_data)
173 struct seq_file *m = cb_data;
174 struct obd_export *exp = cfs_hash_object(hs, hnode);
175 struct lu_nodemap *nodemap = exp->exp_target_data.ted_nodemap;
178 seq_printf(m, "%s\n", nodemap->nm_name);
183 lprocfs_exp_nodemap_seq_show(struct seq_file *m, void *data)
185 struct nid_stat *stats = m->private;
186 struct obd_device *obd = stats->nid_obd;
188 cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
189 lprocfs_exp_print_nodemap_seq, m);
192 LPROC_SEQ_FOPS_RO(lprocfs_exp_nodemap);
194 static int lprocfs_exp_uuid_seq_show(struct seq_file *m, void *data)
196 struct nid_stat *stats = m->private;
197 struct obd_device *obd = stats->nid_obd;
199 cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
200 lprocfs_exp_print_uuid_seq, m);
203 LPROC_SEQ_FOPS_RO(lprocfs_exp_uuid);
206 lprocfs_exp_print_hash_seq(struct cfs_hash *hs, struct cfs_hash_bd *bd,
207 struct hlist_node *hnode, void *cb_data)
210 struct seq_file *m = cb_data;
211 struct obd_export *exp = cfs_hash_object(hs, hnode);
213 if (exp->exp_lock_hash != NULL) {
214 cfs_hash_debug_header(m);
215 cfs_hash_debug_str(hs, m);
220 static int lprocfs_exp_hash_seq_show(struct seq_file *m, void *data)
222 struct nid_stat *stats = m->private;
223 struct obd_device *obd = stats->nid_obd;
225 cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
226 lprocfs_exp_print_hash_seq, m);
229 LPROC_SEQ_FOPS_RO(lprocfs_exp_hash);
231 int lprocfs_nid_stats_clear_seq_show(struct seq_file *m, void *data)
233 return seq_printf(m, "%s\n", "Write into this file to clear all nid "
234 "stats and stale nid entries");
236 EXPORT_SYMBOL(lprocfs_nid_stats_clear_seq_show);
238 static int lprocfs_nid_stats_clear_write_cb(void *obj, void *data)
240 struct nid_stat *stat = obj;
243 CDEBUG(D_INFO, "refcnt %d\n", atomic_read(&stat->nid_exp_ref_count));
244 if (atomic_read(&stat->nid_exp_ref_count) == 1) {
245 /* object has only hash references. */
246 spin_lock(&stat->nid_obd->obd_nid_lock);
247 list_move(&stat->nid_list, data);
248 spin_unlock(&stat->nid_obd->obd_nid_lock);
251 /* we has reference to object - only clear data*/
253 lprocfs_clear_stats(stat->nid_stats);
259 lprocfs_nid_stats_clear_seq_write(struct file *file, const char *buffer,
260 size_t count, loff_t *off)
262 struct seq_file *m = file->private_data;
263 struct obd_device *obd = m->private;
264 struct nid_stat *client_stat;
265 struct list_head free_list;
267 INIT_LIST_HEAD(&free_list);
268 cfs_hash_cond_del(obd->obd_nid_stats_hash,
269 lprocfs_nid_stats_clear_write_cb, &free_list);
271 while (!list_empty(&free_list)) {
272 client_stat = list_entry(free_list.next, struct nid_stat,
274 list_del_init(&client_stat->nid_list);
275 lprocfs_free_client_stats(client_stat);
279 EXPORT_SYMBOL(lprocfs_nid_stats_clear_seq_write);
281 int lprocfs_exp_setup(struct obd_export *exp, lnet_nid_t *nid)
283 struct nid_stat *new_stat, *old_stat;
284 struct obd_device *obd = NULL;
285 struct proc_dir_entry *entry;
286 char nidstr[LNET_NIDSTR_SIZE];
290 if (!exp || !exp->exp_obd || !exp->exp_obd->obd_proc_exports_entry ||
291 !exp->exp_obd->obd_nid_stats_hash)
294 /* not test against zero because eric say:
295 * You may only test nid against another nid, or LNET_NID_ANY.
296 * Anything else is nonsense.*/
297 if (nid == NULL || *nid == LNET_NID_ANY)
300 libcfs_nid2str_r(*nid, nidstr, sizeof(nidstr));
302 spin_lock(&exp->exp_lock);
303 if (exp->exp_nid_stats != NULL) {
304 spin_unlock(&exp->exp_lock);
307 spin_unlock(&exp->exp_lock);
311 CDEBUG(D_CONFIG, "using hash %p\n", obd->obd_nid_stats_hash);
313 OBD_ALLOC_PTR(new_stat);
314 if (new_stat == NULL)
317 new_stat->nid = *nid;
318 new_stat->nid_obd = exp->exp_obd;
319 /* we need set default refcount to 1 to balance obd_disconnect */
320 atomic_set(&new_stat->nid_exp_ref_count, 1);
322 old_stat = cfs_hash_findadd_unique(obd->obd_nid_stats_hash,
323 nid, &new_stat->nid_hash);
324 CDEBUG(D_INFO, "Found stats %p for nid %s - ref %d\n",
325 old_stat, nidstr, atomic_read(&old_stat->nid_exp_ref_count));
327 /* Return -EALREADY here so that we know that the /proc
328 * entry already has been created */
329 if (old_stat != new_stat) {
330 spin_lock(&exp->exp_lock);
331 if (exp->exp_nid_stats) {
332 LASSERT(exp->exp_nid_stats == old_stat);
333 nidstat_putref(exp->exp_nid_stats);
335 exp->exp_nid_stats = old_stat;
336 spin_unlock(&exp->exp_lock);
337 GOTO(destroy_new, rc = -EALREADY);
339 /* not found - create */
340 new_stat->nid_proc = lprocfs_register(nidstr,
341 obd->obd_proc_exports_entry,
344 if (IS_ERR(new_stat->nid_proc)) {
345 rc = PTR_ERR(new_stat->nid_proc);
346 new_stat->nid_proc = NULL;
347 CERROR("%s: cannot create proc entry for export %s: rc = %d\n",
348 obd->obd_name, nidstr, rc);
349 GOTO(destroy_new_ns, rc);
352 entry = lprocfs_add_simple(new_stat->nid_proc, "nodemap", new_stat,
353 &lprocfs_exp_nodemap_fops);
356 CWARN("Error adding the nodemap file: rc = %d\n", rc);
357 GOTO(destroy_new_ns, rc);
360 entry = lprocfs_add_simple(new_stat->nid_proc, "uuid", new_stat,
361 &lprocfs_exp_uuid_fops);
364 CWARN("Error adding the NID stats file: rc = %d\n", rc);
365 GOTO(destroy_new_ns, rc);
368 entry = lprocfs_add_simple(new_stat->nid_proc, "hash", new_stat,
369 &lprocfs_exp_hash_fops);
372 CWARN("Error adding the hash file: rc = %d\n", rc);
373 GOTO(destroy_new_ns, rc);
376 spin_lock(&exp->exp_lock);
377 exp->exp_nid_stats = new_stat;
378 spin_unlock(&exp->exp_lock);
380 /* protect competitive add to list, not need locking on destroy */
381 spin_lock(&obd->obd_nid_lock);
382 list_add(&new_stat->nid_list, &obd->obd_nid_stats);
383 spin_unlock(&obd->obd_nid_lock);
388 if (new_stat->nid_proc != NULL)
389 lprocfs_remove(&new_stat->nid_proc);
390 cfs_hash_del(obd->obd_nid_stats_hash, nid, &new_stat->nid_hash);
393 nidstat_putref(new_stat);
394 OBD_FREE_PTR(new_stat);
397 EXPORT_SYMBOL(lprocfs_exp_setup);
399 int lprocfs_exp_cleanup(struct obd_export *exp)
401 struct nid_stat *stat = exp->exp_nid_stats;
403 if (!stat || !exp->exp_obd)
406 nidstat_putref(exp->exp_nid_stats);
407 exp->exp_nid_stats = NULL;
412 #define LPROCFS_OBD_OP_INIT(base, stats, op) \
414 unsigned int coffset = base + OBD_COUNTER_OFFSET(op); \
415 LASSERT(coffset < stats->ls_num); \
416 lprocfs_counter_init(stats, coffset, 0, #op, "reqs"); \
419 void lprocfs_init_ops_stats(int num_private_stats, struct lprocfs_stats *stats)
421 LPROCFS_OBD_OP_INIT(num_private_stats, stats, iocontrol);
422 LPROCFS_OBD_OP_INIT(num_private_stats, stats, get_info);
423 LPROCFS_OBD_OP_INIT(num_private_stats, stats, set_info_async);
424 LPROCFS_OBD_OP_INIT(num_private_stats, stats, setup);
425 LPROCFS_OBD_OP_INIT(num_private_stats, stats, precleanup);
426 LPROCFS_OBD_OP_INIT(num_private_stats, stats, cleanup);
427 LPROCFS_OBD_OP_INIT(num_private_stats, stats, process_config);
428 LPROCFS_OBD_OP_INIT(num_private_stats, stats, postrecov);
429 LPROCFS_OBD_OP_INIT(num_private_stats, stats, add_conn);
430 LPROCFS_OBD_OP_INIT(num_private_stats, stats, del_conn);
431 LPROCFS_OBD_OP_INIT(num_private_stats, stats, connect);
432 LPROCFS_OBD_OP_INIT(num_private_stats, stats, reconnect);
433 LPROCFS_OBD_OP_INIT(num_private_stats, stats, disconnect);
434 LPROCFS_OBD_OP_INIT(num_private_stats, stats, fid_init);
435 LPROCFS_OBD_OP_INIT(num_private_stats, stats, fid_fini);
436 LPROCFS_OBD_OP_INIT(num_private_stats, stats, fid_alloc);
437 LPROCFS_OBD_OP_INIT(num_private_stats, stats, statfs);
438 LPROCFS_OBD_OP_INIT(num_private_stats, stats, statfs_async);
439 LPROCFS_OBD_OP_INIT(num_private_stats, stats, unpackmd);
440 LPROCFS_OBD_OP_INIT(num_private_stats, stats, create);
441 LPROCFS_OBD_OP_INIT(num_private_stats, stats, destroy);
442 LPROCFS_OBD_OP_INIT(num_private_stats, stats, setattr);
443 LPROCFS_OBD_OP_INIT(num_private_stats, stats, getattr);
444 LPROCFS_OBD_OP_INIT(num_private_stats, stats, preprw);
445 LPROCFS_OBD_OP_INIT(num_private_stats, stats, commitrw);
446 LPROCFS_OBD_OP_INIT(num_private_stats, stats, init_export);
447 LPROCFS_OBD_OP_INIT(num_private_stats, stats, destroy_export);
448 LPROCFS_OBD_OP_INIT(num_private_stats, stats, import_event);
449 LPROCFS_OBD_OP_INIT(num_private_stats, stats, notify);
450 LPROCFS_OBD_OP_INIT(num_private_stats, stats, health_check);
451 LPROCFS_OBD_OP_INIT(num_private_stats, stats, get_uuid);
452 LPROCFS_OBD_OP_INIT(num_private_stats, stats, quotactl);
453 LPROCFS_OBD_OP_INIT(num_private_stats, stats, ping);
454 LPROCFS_OBD_OP_INIT(num_private_stats, stats, pool_new);
455 LPROCFS_OBD_OP_INIT(num_private_stats, stats, pool_rem);
456 LPROCFS_OBD_OP_INIT(num_private_stats, stats, pool_add);
457 LPROCFS_OBD_OP_INIT(num_private_stats, stats, pool_del);
458 LPROCFS_OBD_OP_INIT(num_private_stats, stats, getref);
459 LPROCFS_OBD_OP_INIT(num_private_stats, stats, putref);
461 CLASSERT(NUM_OBD_STATS == OBD_COUNTER_OFFSET(putref) + 1);
463 EXPORT_SYMBOL(lprocfs_init_ops_stats);
465 int lprocfs_alloc_obd_stats(struct obd_device *obd, unsigned num_private_stats)
467 struct lprocfs_stats *stats;
468 unsigned int num_stats;
471 LASSERT(obd->obd_stats == NULL);
472 LASSERT(obd->obd_proc_entry != NULL);
473 LASSERT(obd->obd_cntr_base == 0);
475 num_stats = NUM_OBD_STATS + num_private_stats;
476 stats = lprocfs_alloc_stats(num_stats, 0);
480 lprocfs_init_ops_stats(num_private_stats, stats);
482 for (i = num_private_stats; i < num_stats; i++) {
483 /* If this LBUGs, it is likely that an obd
484 * operation was added to struct obd_ops in
485 * <obd.h>, and that the corresponding line item
486 * LPROCFS_OBD_OP_INIT(.., .., opname)
487 * is missing from the list above. */
488 LASSERTF(stats->ls_cnt_header[i].lc_name != NULL,
489 "Missing obd_stat initializer obd_op "
490 "operation at offset %d.\n", i - num_private_stats);
492 rc = lprocfs_register_stats(obd->obd_proc_entry, "stats", stats);
494 lprocfs_free_stats(&stats);
496 obd->obd_stats = stats;
497 obd->obd_cntr_base = num_private_stats;
501 EXPORT_SYMBOL(lprocfs_alloc_obd_stats);
503 void lprocfs_free_obd_stats(struct obd_device *obd)
506 lprocfs_free_stats(&obd->obd_stats);
508 EXPORT_SYMBOL(lprocfs_free_obd_stats);
510 int lprocfs_hash_seq_show(struct seq_file *m, void *data)
512 struct obd_device *obd = m->private;
518 c += cfs_hash_debug_header(m);
519 c += cfs_hash_debug_str(obd->obd_uuid_hash, m);
520 c += cfs_hash_debug_str(obd->obd_nid_hash, m);
521 c += cfs_hash_debug_str(obd->obd_nid_stats_hash, m);
524 EXPORT_SYMBOL(lprocfs_hash_seq_show);
526 int lprocfs_recovery_status_seq_show(struct seq_file *m, void *data)
528 struct obd_device *obd = m->private;
530 LASSERT(obd != NULL);
532 seq_printf(m, "status: ");
533 if (obd->obd_max_recoverable_clients == 0) {
534 seq_printf(m, "INACTIVE\n");
538 /* sampled unlocked, but really... */
539 if (obd->obd_recovering == 0) {
540 seq_printf(m, "COMPLETE\n");
541 seq_printf(m, "recovery_start: %lu\n", obd->obd_recovery_start);
542 seq_printf(m, "recovery_duration: %lu\n",
543 obd->obd_recovery_end - obd->obd_recovery_start);
544 /* Number of clients that have completed recovery */
545 seq_printf(m, "completed_clients: %d/%d\n",
546 obd->obd_max_recoverable_clients -
547 obd->obd_stale_clients,
548 obd->obd_max_recoverable_clients);
549 seq_printf(m, "replayed_requests: %d\n",
550 obd->obd_replayed_requests);
551 seq_printf(m, "last_transno: "LPD64"\n",
552 obd->obd_next_recovery_transno - 1);
553 seq_printf(m, "VBR: %s\n", obd->obd_version_recov ?
554 "ENABLED" : "DISABLED");
555 seq_printf(m, "IR: %s\n", obd->obd_no_ir ?
556 "DISABLED" : "ENABLED");
560 seq_printf(m, "RECOVERING\n");
561 seq_printf(m, "recovery_start: %lu\n", obd->obd_recovery_start);
562 seq_printf(m, "time_remaining: %lu\n",
563 cfs_time_current_sec() >=
564 obd->obd_recovery_start +
565 obd->obd_recovery_timeout ? 0 :
566 obd->obd_recovery_start +
567 obd->obd_recovery_timeout -
568 cfs_time_current_sec());
569 seq_printf(m, "connected_clients: %d/%d\n",
570 atomic_read(&obd->obd_connected_clients),
571 obd->obd_max_recoverable_clients);
572 /* Number of clients that have completed recovery */
573 seq_printf(m, "req_replay_clients: %d\n",
574 atomic_read(&obd->obd_req_replay_clients));
575 seq_printf(m, "lock_repay_clients: %d\n",
576 atomic_read(&obd->obd_lock_replay_clients));
577 seq_printf(m, "completed_clients: %d\n",
578 atomic_read(&obd->obd_connected_clients) -
579 atomic_read(&obd->obd_lock_replay_clients));
580 seq_printf(m, "evicted_clients: %d\n", obd->obd_stale_clients);
581 seq_printf(m, "replayed_requests: %d\n", obd->obd_replayed_requests);
582 seq_printf(m, "queued_requests: %d\n",
583 obd->obd_requests_queued_for_recovery);
584 seq_printf(m, "next_transno: "LPD64"\n",
585 obd->obd_next_recovery_transno);
589 EXPORT_SYMBOL(lprocfs_recovery_status_seq_show);
591 int lprocfs_ir_factor_seq_show(struct seq_file *m, void *data)
593 struct obd_device *obd = m->private;
595 LASSERT(obd != NULL);
596 return seq_printf(m, "%d\n", obd->obd_recovery_ir_factor);
598 EXPORT_SYMBOL(lprocfs_ir_factor_seq_show);
601 lprocfs_ir_factor_seq_write(struct file *file, const char *buffer,
602 size_t count, loff_t *off)
604 struct seq_file *m = file->private_data;
605 struct obd_device *obd = m->private;
608 LASSERT(obd != NULL);
609 rc = lprocfs_write_helper(buffer, count, &val);
613 if (val < OBD_IR_FACTOR_MIN || val > OBD_IR_FACTOR_MAX)
616 obd->obd_recovery_ir_factor = val;
619 EXPORT_SYMBOL(lprocfs_ir_factor_seq_write);
621 int lprocfs_recovery_time_soft_seq_show(struct seq_file *m, void *data)
623 struct obd_device *obd = m->private;
625 LASSERT(obd != NULL);
626 return seq_printf(m, "%d\n", obd->obd_recovery_timeout);
628 EXPORT_SYMBOL(lprocfs_recovery_time_soft_seq_show);
631 lprocfs_recovery_time_soft_seq_write(struct file *file, const char *buffer,
632 size_t count, loff_t *off)
634 struct seq_file *m = file->private_data;
635 struct obd_device *obd = m->private;
638 LASSERT(obd != NULL);
639 rc = lprocfs_write_helper(buffer, count, &val);
643 obd->obd_recovery_timeout = val;
646 EXPORT_SYMBOL(lprocfs_recovery_time_soft_seq_write);
648 int lprocfs_recovery_time_hard_seq_show(struct seq_file *m, void *data)
650 struct obd_device *obd = m->private;
652 LASSERT(obd != NULL);
653 return seq_printf(m, "%u\n", obd->obd_recovery_time_hard);
655 EXPORT_SYMBOL(lprocfs_recovery_time_hard_seq_show);
658 lprocfs_recovery_time_hard_seq_write(struct file *file, const char *buffer,
659 size_t count, loff_t *off)
661 struct seq_file *m = file->private_data;
662 struct obd_device *obd = m->private;
665 LASSERT(obd != NULL);
666 rc = lprocfs_write_helper(buffer, count, &val);
670 obd->obd_recovery_time_hard = val;
673 EXPORT_SYMBOL(lprocfs_recovery_time_hard_seq_write);
675 int lprocfs_target_instance_seq_show(struct seq_file *m, void *data)
677 struct obd_device *obd = m->private;
678 struct obd_device_target *target = &obd->u.obt;
680 LASSERT(obd != NULL);
681 LASSERT(target->obt_magic == OBT_MAGIC);
682 return seq_printf(m, "%u\n", obd->u.obt.obt_instance);
684 EXPORT_SYMBOL(lprocfs_target_instance_seq_show);
686 #endif /* CONFIG_PROC_FS*/