1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 #define DEBUG_SUBSYSTEM S_CLASS
39 # include <liblustre.h>
42 #include <obd_support.h>
44 #include <lprocfs_status.h>
45 #include <lustre/lustre_idl.h>
46 #include <lustre_net.h>
47 #include <obd_class.h>
48 #include "ptlrpc_internal.h"
51 struct ll_rpc_opcode {
54 } ll_rpc_opcode_table[LUSTRE_MAX_OPCODES] = {
55 { OST_REPLY, "ost_reply" },
56 { OST_GETATTR, "ost_getattr" },
57 { OST_SETATTR, "ost_setattr" },
58 { OST_READ, "ost_read" },
59 { OST_WRITE, "ost_write" },
60 { OST_CREATE , "ost_create" },
61 { OST_DESTROY, "ost_destroy" },
62 { OST_GET_INFO, "ost_get_info" },
63 { OST_CONNECT, "ost_connect" },
64 { OST_DISCONNECT, "ost_disconnect" },
65 { OST_PUNCH, "ost_punch" },
66 { OST_OPEN, "ost_open" },
67 { OST_CLOSE, "ost_close" },
68 { OST_STATFS, "ost_statfs" },
69 { 14, NULL }, /* formerly OST_SAN_READ */
70 { 15, NULL }, /* formerly OST_SAN_WRITE */
71 { OST_SYNC, "ost_sync" },
72 { OST_SET_INFO, "ost_set_info" },
73 { OST_QUOTACHECK, "ost_quotacheck" },
74 { OST_QUOTACTL, "ost_quotactl" },
75 { OST_QUOTA_ADJUST_QUNIT, "ost_quota_adjust_qunit" },
76 { MDS_GETATTR, "mds_getattr" },
77 { MDS_GETATTR_NAME, "mds_getattr_lock" },
78 { MDS_CLOSE, "mds_close" },
79 { MDS_REINT, "mds_reint" },
80 { MDS_READPAGE, "mds_readpage" },
81 { MDS_CONNECT, "mds_connect" },
82 { MDS_DISCONNECT, "mds_disconnect" },
83 { MDS_GETSTATUS, "mds_getstatus" },
84 { MDS_STATFS, "mds_statfs" },
85 { MDS_PIN, "mds_pin" },
86 { MDS_UNPIN, "mds_unpin" },
87 { MDS_SYNC, "mds_sync" },
88 { MDS_DONE_WRITING, "mds_done_writing" },
89 { MDS_SET_INFO, "mds_set_info" },
90 { MDS_QUOTACHECK, "mds_quotacheck" },
91 { MDS_QUOTACTL, "mds_quotactl" },
92 { MDS_GETXATTR, "mds_getxattr" },
93 { MDS_SETXATTR, "mds_setxattr" },
94 { MDS_WRITEPAGE, "mds_writepage" },
95 { MDS_IS_SUBDIR, "mds_is_subdir" },
96 { MDS_GET_INFO, "mds_get_info" },
97 { LDLM_ENQUEUE, "ldlm_enqueue" },
98 { LDLM_CONVERT, "ldlm_convert" },
99 { LDLM_CANCEL, "ldlm_cancel" },
100 { LDLM_BL_CALLBACK, "ldlm_bl_callback" },
101 { LDLM_CP_CALLBACK, "ldlm_cp_callback" },
102 { LDLM_GL_CALLBACK, "ldlm_gl_callback" },
103 { MGS_CONNECT, "mgs_connect" },
104 { MGS_DISCONNECT, "mgs_disconnect" },
105 { MGS_EXCEPTION, "mgs_exception" },
106 { MGS_TARGET_REG, "mgs_target_reg" },
107 { MGS_TARGET_DEL, "mgs_target_del" },
108 { MGS_SET_INFO, "mgs_set_info" },
109 { OBD_PING, "obd_ping" },
110 { OBD_LOG_CANCEL, "llog_origin_handle_cancel" },
111 { OBD_QC_CALLBACK, "obd_quota_callback" },
112 { LLOG_ORIGIN_HANDLE_CREATE, "llog_origin_handle_create" },
113 { LLOG_ORIGIN_HANDLE_NEXT_BLOCK, "llog_origin_handle_next_block" },
114 { LLOG_ORIGIN_HANDLE_READ_HEADER,"llog_origin_handle_read_header" },
115 { LLOG_ORIGIN_HANDLE_WRITE_REC, "llog_origin_handle_write_rec" },
116 { LLOG_ORIGIN_HANDLE_CLOSE, "llog_origin_handle_close" },
117 { LLOG_ORIGIN_CONNECT, "llog_origin_connect" },
118 { LLOG_CATINFO, "llog_catinfo" },
119 { LLOG_ORIGIN_HANDLE_PREV_BLOCK, "llog_origin_handle_prev_block" },
120 { LLOG_ORIGIN_HANDLE_DESTROY, "llog_origin_handle_destroy" },
121 { QUOTA_DQACQ, "quota_acquire" },
122 { QUOTA_DQREL, "quota_release" },
123 { SEQ_QUERY, "seq_query" },
124 { SEC_CTX_INIT, "sec_ctx_init" },
125 { SEC_CTX_INIT_CONT,"sec_ctx_init_cont" },
126 { SEC_CTX_FINI, "sec_ctx_fini" },
127 { FLD_QUERY, "fld_query" }
133 } ll_eopcode_table[EXTRA_LAST_OPC] = {
134 { LDLM_GLIMPSE_ENQUEUE, "ldlm_glimpse_enqueue" },
135 { LDLM_PLAIN_ENQUEUE, "ldlm_plain_enqueue" },
136 { LDLM_EXTENT_ENQUEUE, "ldlm_extent_enqueue" },
137 { LDLM_FLOCK_ENQUEUE, "ldlm_flock_enqueue" },
138 { LDLM_IBITS_ENQUEUE, "ldlm_ibits_enqueue" },
139 { MDS_REINT_SETATTR, "mds_reint_setattr" },
140 { MDS_REINT_CREATE, "mds_reint_create" },
141 { MDS_REINT_LINK, "mds_reint_link" },
142 { MDS_REINT_UNLINK, "mds_reint_unlink" },
143 { MDS_REINT_RENAME, "mds_reint_rename" },
144 { MDS_REINT_OPEN, "mds_reint_open" },
145 { MDS_REINT_SETXATTR, "mds_reint_setxattr" },
146 { BRW_READ_BYTES, "read_bytes" },
147 { BRW_WRITE_BYTES, "write_bytes" },
150 const char *ll_opcode2str(__u32 opcode)
152 /* When one of the assertions below fail, chances are that:
153 * 1) A new opcode was added in include/lustre/lustre_idl.h,
154 * but is missing from the table above.
155 * or 2) The opcode space was renumbered or rearranged,
156 * and the opcode_offset() function in
157 * ptlrpc_internal.h needs to be modified.
159 __u32 offset = opcode_offset(opcode);
160 LASSERTF(offset < LUSTRE_MAX_OPCODES,
161 "offset %u >= LUSTRE_MAX_OPCODES %u\n",
162 offset, LUSTRE_MAX_OPCODES);
163 LASSERTF(ll_rpc_opcode_table[offset].opcode == opcode,
164 "ll_rpc_opcode_table[%u].opcode %u != opcode %u\n",
165 offset, ll_rpc_opcode_table[offset].opcode, opcode);
166 return ll_rpc_opcode_table[offset].opname;
169 const char* ll_eopcode2str(__u32 opcode)
171 LASSERT(ll_eopcode_table[opcode].opcode == opcode);
172 return ll_eopcode_table[opcode].opname;
175 void ptlrpc_lprocfs_register(struct proc_dir_entry *root, char *dir,
176 char *name, struct proc_dir_entry **procroot_ret,
177 struct lprocfs_stats **stats_ret)
179 struct proc_dir_entry *svc_procroot;
180 struct lprocfs_stats *svc_stats;
182 unsigned int svc_counter_config = LPROCFS_CNTR_AVGMINMAX |
185 LASSERT(*procroot_ret == NULL);
186 LASSERT(*stats_ret == NULL);
188 svc_stats = lprocfs_alloc_stats(EXTRA_MAX_OPCODES+LUSTRE_MAX_OPCODES,0);
189 if (svc_stats == NULL)
193 svc_procroot = lprocfs_register(dir, root, NULL, NULL);
194 if (IS_ERR(svc_procroot)) {
195 lprocfs_free_stats(&svc_stats);
202 lprocfs_counter_init(svc_stats, PTLRPC_REQWAIT_CNTR,
203 svc_counter_config, "req_waittime", "usec");
204 lprocfs_counter_init(svc_stats, PTLRPC_REQQDEPTH_CNTR,
205 svc_counter_config, "req_qdepth", "reqs");
206 lprocfs_counter_init(svc_stats, PTLRPC_REQACTIVE_CNTR,
207 svc_counter_config, "req_active", "reqs");
208 lprocfs_counter_init(svc_stats, PTLRPC_TIMEOUT,
209 svc_counter_config, "req_timeout", "sec");
210 lprocfs_counter_init(svc_stats, PTLRPC_REQBUF_AVAIL_CNTR,
211 svc_counter_config, "reqbuf_avail", "bufs");
212 for (i = 0; i < EXTRA_LAST_OPC; i++) {
216 case BRW_WRITE_BYTES:
224 lprocfs_counter_init(svc_stats, PTLRPC_LAST_CNTR + i,
226 ll_eopcode2str(i), units);
228 for (i = 0; i < LUSTRE_MAX_OPCODES; i++) {
229 __u32 opcode = ll_rpc_opcode_table[i].opcode;
230 lprocfs_counter_init(svc_stats,
231 EXTRA_MAX_OPCODES + i, svc_counter_config,
232 ll_opcode2str(opcode), "usec");
235 rc = lprocfs_register_stats(svc_procroot, name, svc_stats);
238 lprocfs_remove(&svc_procroot);
239 lprocfs_free_stats(&svc_stats);
242 *procroot_ret = svc_procroot;
243 *stats_ret = svc_stats;
248 ptlrpc_lprocfs_read_req_history_len(char *page, char **start, off_t off,
249 int count, int *eof, void *data)
251 struct ptlrpc_service *svc = data;
254 return snprintf(page, count, "%d\n", svc->srv_n_history_rqbds);
258 ptlrpc_lprocfs_read_req_history_max(char *page, char **start, off_t off,
259 int count, int *eof, void *data)
261 struct ptlrpc_service *svc = data;
264 return snprintf(page, count, "%d\n", svc->srv_max_history_rqbds);
268 ptlrpc_lprocfs_write_req_history_max(struct file *file, const char *buffer,
269 unsigned long count, void *data)
271 struct ptlrpc_service *svc = data;
274 int rc = lprocfs_write_helper(buffer, count, &val);
282 /* This sanity check is more of an insanity check; we can still
283 * hose a kernel by allowing the request history to grow too
285 bufpages = (svc->srv_buf_size + CFS_PAGE_SIZE - 1) >> CFS_PAGE_SHIFT;
286 if (val > num_physpages/(2 * bufpages))
289 spin_lock(&svc->srv_lock);
290 svc->srv_max_history_rqbds = val;
291 spin_unlock(&svc->srv_lock);
296 struct ptlrpc_srh_iterator {
298 struct ptlrpc_request *srhi_req;
302 ptlrpc_lprocfs_svc_req_history_seek(struct ptlrpc_service *svc,
303 struct ptlrpc_srh_iterator *srhi,
307 struct ptlrpc_request *req;
309 if (srhi->srhi_req != NULL &&
310 srhi->srhi_seq > svc->srv_request_max_cull_seq &&
311 srhi->srhi_seq <= seq) {
312 /* If srhi_req was set previously, hasn't been culled and
313 * we're searching for a seq on or after it (i.e. more
314 * recent), search from it onwards.
315 * Since the service history is LRU (i.e. culled reqs will
316 * be near the head), we shouldn't have to do long
318 LASSERT (srhi->srhi_seq == srhi->srhi_req->rq_history_seq);
319 LASSERT (!list_empty(&svc->srv_request_history));
320 e = &srhi->srhi_req->rq_history_list;
322 /* search from start */
323 e = svc->srv_request_history.next;
326 while (e != &svc->srv_request_history) {
327 req = list_entry(e, struct ptlrpc_request, rq_history_list);
329 if (req->rq_history_seq >= seq) {
330 srhi->srhi_seq = req->rq_history_seq;
331 srhi->srhi_req = req;
341 ptlrpc_lprocfs_svc_req_history_start(struct seq_file *s, loff_t *pos)
343 struct ptlrpc_service *svc = s->private;
344 struct ptlrpc_srh_iterator *srhi;
347 OBD_ALLOC(srhi, sizeof(*srhi));
352 srhi->srhi_req = NULL;
354 spin_lock(&svc->srv_lock);
355 rc = ptlrpc_lprocfs_svc_req_history_seek(svc, srhi, *pos);
356 spin_unlock(&svc->srv_lock);
359 *pos = srhi->srhi_seq;
363 OBD_FREE(srhi, sizeof(*srhi));
368 ptlrpc_lprocfs_svc_req_history_stop(struct seq_file *s, void *iter)
370 struct ptlrpc_srh_iterator *srhi = iter;
373 OBD_FREE(srhi, sizeof(*srhi));
377 ptlrpc_lprocfs_svc_req_history_next(struct seq_file *s,
378 void *iter, loff_t *pos)
380 struct ptlrpc_service *svc = s->private;
381 struct ptlrpc_srh_iterator *srhi = iter;
384 spin_lock(&svc->srv_lock);
385 rc = ptlrpc_lprocfs_svc_req_history_seek(svc, srhi, *pos + 1);
386 spin_unlock(&svc->srv_lock);
389 OBD_FREE(srhi, sizeof(*srhi));
393 *pos = srhi->srhi_seq;
397 /* common ost/mdt srv_request_history_print_fn */
398 void target_print_req(void *seq_file, struct ptlrpc_request *req)
400 /* Called holding srv_lock with irqs disabled.
401 * Print specific req contents and a newline.
402 * CAVEAT EMPTOR: check request message length before printing!!!
403 * You might have received any old crap so you must be just as
404 * careful here as the service's request parser!!! */
405 struct seq_file *sf = seq_file;
407 switch (req->rq_phase) {
409 /* still awaiting a service thread's attention, or rejected
410 * because the generic request message didn't unpack */
411 seq_printf(sf, "<not swabbed>\n");
413 case RQ_PHASE_INTERPRET:
414 /* being handled, so basic msg swabbed, and opc is valid
415 * but racing with mds_handle() */
416 case RQ_PHASE_COMPLETE:
417 /* been handled by mds_handle() reply state possibly still
419 seq_printf(sf, "opc %d\n", lustre_msg_get_opc(req->rq_reqmsg));
422 DEBUG_REQ(D_ERROR, req, "bad phase %d", req->rq_phase);
425 EXPORT_SYMBOL(target_print_req);
427 static int ptlrpc_lprocfs_svc_req_history_show(struct seq_file *s, void *iter)
429 struct ptlrpc_service *svc = s->private;
430 struct ptlrpc_srh_iterator *srhi = iter;
431 struct ptlrpc_request *req;
434 spin_lock(&svc->srv_lock);
436 rc = ptlrpc_lprocfs_svc_req_history_seek(svc, srhi, srhi->srhi_seq);
439 req = srhi->srhi_req;
441 /* Print common req fields.
442 * CAVEAT EMPTOR: we're racing with the service handler
443 * here. The request could contain any old crap, so you
444 * must be just as careful as the service's request
445 * parser. Currently I only print stuff here I know is OK
446 * to look at coz it was set up in request_in_callback()!!! */
447 seq_printf(s, LPD64":%s:%s:x"LPU64":%d:%s:%ld:%lds(%+lds) ",
448 req->rq_history_seq, libcfs_nid2str(req->rq_self),
449 libcfs_id2str(req->rq_peer), req->rq_xid,
450 req->rq_reqlen, ptlrpc_rqphase2str(req),
451 req->rq_arrival_time.tv_sec,
452 req->rq_sent - req->rq_arrival_time.tv_sec,
453 req->rq_sent - req->rq_deadline);
454 if (svc->srv_request_history_print_fn == NULL)
457 svc->srv_request_history_print_fn(s, srhi->srhi_req);
460 spin_unlock(&svc->srv_lock);
466 ptlrpc_lprocfs_svc_req_history_open(struct inode *inode, struct file *file)
468 static struct seq_operations sops = {
469 .start = ptlrpc_lprocfs_svc_req_history_start,
470 .stop = ptlrpc_lprocfs_svc_req_history_stop,
471 .next = ptlrpc_lprocfs_svc_req_history_next,
472 .show = ptlrpc_lprocfs_svc_req_history_show,
474 struct proc_dir_entry *dp = PDE(inode);
475 struct seq_file *seqf;
478 LPROCFS_ENTRY_AND_CHECK(dp);
479 rc = seq_open(file, &sops);
485 seqf = file->private_data;
486 seqf->private = dp->data;
490 /* See also lprocfs_rd_timeouts */
491 static int ptlrpc_lprocfs_rd_timeouts(char *page, char **start, off_t off,
492 int count, int *eof, void *data)
494 struct ptlrpc_service *svc = data;
495 unsigned int cur, worst;
501 cur = at_get(&svc->srv_at_estimate);
502 worst = svc->srv_at_estimate.at_worst_ever;
503 worstt = svc->srv_at_estimate.at_worst_time;
504 s2dhms(&ts, cfs_time_current_sec() - worstt);
506 rc += snprintf(page + rc, count - rc,
507 "adaptive timeouts off, using obd_timeout %u\n",
509 rc += snprintf(page + rc, count - rc,
510 "%10s : cur %3u worst %3u (at %ld, "DHMS_FMT" ago) ",
511 "service", cur, worst, worstt,
513 rc = lprocfs_at_hist_helper(page, count, rc,
514 &svc->srv_at_estimate);
518 static int ptlrpc_lprocfs_rd_hp_ratio(char *page, char **start, off_t off,
519 int count, int *eof, void *data)
521 struct ptlrpc_service *svc = data;
522 int rc = snprintf(page, count, "%d", svc->srv_hpreq_ratio);
526 static int ptlrpc_lprocfs_wr_hp_ratio(struct file *file, const char *buffer,
527 unsigned long count, void *data)
529 struct ptlrpc_service *svc = data;
532 rc = lprocfs_write_helper(buffer, count, &val);
538 spin_lock(&svc->srv_lock);
539 svc->srv_hpreq_ratio = val;
540 spin_unlock(&svc->srv_lock);
544 void ptlrpc_lprocfs_register_service(struct proc_dir_entry *entry,
545 struct ptlrpc_service *svc)
547 struct lprocfs_vars lproc_vars[] = {
548 {.name = "req_buffer_history_len",
550 .read_fptr = ptlrpc_lprocfs_read_req_history_len,
552 {.name = "req_buffer_history_max",
553 .write_fptr = ptlrpc_lprocfs_write_req_history_max,
554 .read_fptr = ptlrpc_lprocfs_read_req_history_max,
557 .read_fptr = ptlrpc_lprocfs_rd_timeouts,
559 {.name = "high_priority_ratio",
560 .read_fptr = ptlrpc_lprocfs_rd_hp_ratio,
561 .write_fptr = ptlrpc_lprocfs_wr_hp_ratio,
565 static struct file_operations req_history_fops = {
566 .owner = THIS_MODULE,
567 .open = ptlrpc_lprocfs_svc_req_history_open,
570 .release = lprocfs_seq_release,
575 ptlrpc_lprocfs_register(entry, svc->srv_name,
576 "stats", &svc->srv_procroot,
579 if (svc->srv_procroot == NULL)
582 lprocfs_add_vars(svc->srv_procroot, lproc_vars, NULL);
584 rc = lprocfs_seq_create(svc->srv_procroot, "req_history",
585 0400, &req_history_fops, svc);
587 CWARN("Error adding the req_history file\n");
590 void ptlrpc_lprocfs_register_obd(struct obd_device *obddev)
592 ptlrpc_lprocfs_register(obddev->obd_proc_entry, NULL, "stats",
593 &obddev->obd_svc_procroot,
594 &obddev->obd_svc_stats);
596 EXPORT_SYMBOL(ptlrpc_lprocfs_register_obd);
598 void ptlrpc_lprocfs_rpc_sent(struct ptlrpc_request *req, long amount)
600 struct lprocfs_stats *svc_stats;
601 __u32 op = lustre_msg_get_opc(req->rq_reqmsg);
602 int opc = opcode_offset(op);
604 svc_stats = req->rq_import->imp_obd->obd_svc_stats;
605 if (svc_stats == NULL || opc <= 0)
607 LASSERT(opc < LUSTRE_MAX_OPCODES);
608 if (!(op == LDLM_ENQUEUE || op == MDS_REINT))
609 lprocfs_counter_add(svc_stats, opc + EXTRA_MAX_OPCODES, amount);
612 void ptlrpc_lprocfs_brw(struct ptlrpc_request *req, int bytes)
614 struct lprocfs_stats *svc_stats;
619 svc_stats = req->rq_import->imp_obd->obd_svc_stats;
622 idx = lustre_msg_get_opc(req->rq_reqmsg);
625 idx = BRW_READ_BYTES + PTLRPC_LAST_CNTR;
628 idx = BRW_WRITE_BYTES + PTLRPC_LAST_CNTR;
631 LASSERTF(0, "unsupported opcode %u\n", idx);
635 lprocfs_counter_add(svc_stats, idx, bytes);
638 EXPORT_SYMBOL(ptlrpc_lprocfs_brw);
640 void ptlrpc_lprocfs_unregister_service(struct ptlrpc_service *svc)
642 if (svc->srv_procroot != NULL)
643 lprocfs_remove(&svc->srv_procroot);
646 lprocfs_free_stats(&svc->srv_stats);
649 void ptlrpc_lprocfs_unregister_obd(struct obd_device *obd)
651 if (obd->obd_svc_procroot)
652 lprocfs_remove(&obd->obd_svc_procroot);
654 if (obd->obd_svc_stats)
655 lprocfs_free_stats(&obd->obd_svc_stats);
657 EXPORT_SYMBOL(ptlrpc_lprocfs_unregister_obd);
660 int lprocfs_wr_evict_client(struct file *file, const char *buffer,
661 unsigned long count, void *data)
663 struct obd_device *obd = data;
664 char tmpbuf[sizeof(struct obd_uuid)];
666 /* Kludge code(deadlock situation): the lprocfs lock has been held
667 * since the client is evicted by writting client's
668 * uuid/nid to procfs "evict_client" entry. However,
669 * obd_export_evict_by_uuid() will call lprocfs_remove() to destroy
670 * the proc entries under the being destroyed export{}, so I have
671 * to drop the lock at first here.
672 * - jay, jxiong@clusterfs.com */
673 class_incref(obd, __FUNCTION__, cfs_current());
676 sscanf(buffer, "%40s", tmpbuf);
677 if (strncmp(tmpbuf, "nid:", 4) == 0)
678 obd_export_evict_by_nid(obd, tmpbuf + 4);
679 else if (strncmp(tmpbuf, "uuid:", 5) == 0)
680 obd_export_evict_by_uuid(obd, tmpbuf + 5);
682 obd_export_evict_by_uuid(obd, tmpbuf);
685 class_decref(obd, __FUNCTION__, cfs_current());
689 EXPORT_SYMBOL(lprocfs_wr_evict_client);
691 int lprocfs_wr_ping(struct file *file, const char *buffer,
692 unsigned long count, void *data)
694 struct obd_device *obd = data;
695 struct ptlrpc_request *req;
699 LPROCFS_CLIMP_CHECK(obd);
700 req = ptlrpc_prep_ping(obd->u.cli.cl_import);
701 LPROCFS_CLIMP_EXIT(obd);
705 req->rq_send_state = LUSTRE_IMP_FULL;
707 rc = ptlrpc_queue_wait(req);
709 ptlrpc_req_finished(req);
714 EXPORT_SYMBOL(lprocfs_wr_ping);