lustre/ptlrpc/lproc_ptlrpc.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  Copyright (C) 2002 Cluster File Systems, Inc.
   5  *
   6  *   This file is part of the Lustre file system, http://www.lustre.org
   7  *   Lustre is a trademark of Cluster File Systems, Inc.
   8  *
   9  *   You may have signed or agreed to another license before downloading
  10  *   this software.  If so, you are bound by the terms and conditions
  11  *   of that agreement, and the following does not apply to you.  See the
  12  *   LICENSE file included with this distribution for more information.
  13  *
  14  *   If you did not agree to a different license, then this copy of Lustre
  15  *   is open source software; you can redistribute it and/or modify it
  16  *   under the terms of version 2 of the GNU General Public License as
  17  *   published by the Free Software Foundation.
  18  *
  19  *   In either case, Lustre is distributed in the hope that it will be
  20  *   useful, but WITHOUT ANY WARRANTY; without even the implied warranty
  21  *   of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  *   license text for more details.
  23  *
  24  */
  25 #define DEBUG_SUBSYSTEM S_CLASS
  26
  27 #ifndef __KERNEL__
  28 # include <liblustre.h>
  29 #endif
  30
  31 #include <obd_support.h>
  32 #include <obd.h>
  33 #include <lprocfs_status.h>
  34 #include <lustre/lustre_idl.h>
  35 #include <lustre_net.h>
  36 #include <obd_class.h>
  37 #include "ptlrpc_internal.h"
  38
  39
  40 struct ll_rpc_opcode {
  41      __u32       opcode;
  42      const char *opname;
  43 } ll_rpc_opcode_table[LUSTRE_MAX_OPCODES] = {
  44         { OST_REPLY,        "ost_reply" },
  45         { OST_GETATTR,      "ost_getattr" },
  46         { OST_SETATTR,      "ost_setattr" },
  47         { OST_READ,         "ost_read" },
  48         { OST_WRITE,        "ost_write" },
  49         { OST_CREATE ,      "ost_create" },
  50         { OST_DESTROY,      "ost_destroy" },
  51         { OST_GET_INFO,     "ost_get_info" },
  52         { OST_CONNECT,      "ost_connect" },
  53         { OST_DISCONNECT,   "ost_disconnect" },
  54         { OST_PUNCH,        "ost_punch" },
  55         { OST_OPEN,         "ost_open" },
  56         { OST_CLOSE,        "ost_close" },
  57         { OST_STATFS,       "ost_statfs" },
  58         { 14,                NULL },    /* formerly OST_SAN_READ */
  59         { 15,                NULL },    /* formerly OST_SAN_WRITE */
  60         { OST_SYNC,         "ost_sync" },
  61         { OST_SET_INFO,     "ost_set_info" },
  62         { OST_QUOTACHECK,   "ost_quotacheck" },
  63         { OST_QUOTACTL,     "ost_quotactl" },
  64         { MDS_GETATTR,      "mds_getattr" },
  65         { MDS_GETATTR_NAME, "mds_getattr_lock" },
  66         { MDS_CLOSE,        "mds_close" },
  67         { MDS_REINT,        "mds_reint" },
  68         { MDS_READPAGE,     "mds_readpage" },
  69         { MDS_CONNECT,      "mds_connect" },
  70         { MDS_DISCONNECT,   "mds_disconnect" },
  71         { MDS_GETSTATUS,    "mds_getstatus" },
  72         { MDS_STATFS,       "mds_statfs" },
  73         { MDS_PIN,          "mds_pin" },
  74         { MDS_UNPIN,        "mds_unpin" },
  75         { MDS_SYNC,         "mds_sync" },
  76         { MDS_DONE_WRITING, "mds_done_writing" },
  77         { MDS_SET_INFO,     "mds_set_info" },
  78         { MDS_QUOTACHECK,   "mds_quotacheck" },
  79         { MDS_QUOTACTL,     "mds_quotactl" },
  80         { MDS_GETXATTR,     "mds_getxattr" },
  81         { MDS_SETXATTR,     "mds_setxattr" },
  82         { LDLM_ENQUEUE,     "ldlm_enqueue" },
  83         { LDLM_CONVERT,     "ldlm_convert" },
  84         { LDLM_CANCEL,      "ldlm_cancel" },
  85         { LDLM_BL_CALLBACK, "ldlm_bl_callback" },
  86         { LDLM_CP_CALLBACK, "ldlm_cp_callback" },
  87         { LDLM_GL_CALLBACK, "ldlm_gl_callback" },
  88         { MGS_CONNECT,      "mgs_connect" },
  89         { MGS_DISCONNECT,   "mgs_disconnect" },
  90         { MGS_EXCEPTION,    "mgs_exception" },
  91         { MGS_TARGET_REG,   "mgs_target_reg" },
  92         { MGS_TARGET_DEL,   "mgs_target_del" },
  93         { OBD_PING,         "obd_ping" },
  94         { OBD_LOG_CANCEL,   "llog_origin_handle_cancel" },
  95         { OBD_QC_CALLBACK,  "obd_quota_callback" },
  96         { LLOG_ORIGIN_HANDLE_CREATE,     "llog_origin_handle_create" },
  97         { LLOG_ORIGIN_HANDLE_NEXT_BLOCK, "llog_origin_handle_next_block"},
  98         { LLOG_ORIGIN_HANDLE_READ_HEADER,"llog_origin_handle_read_header" },
  99         { LLOG_ORIGIN_HANDLE_WRITE_REC,  "llog_origin_handle_write_rec" },
 100         { LLOG_ORIGIN_HANDLE_CLOSE,      "llog_origin_handle_close" },
 101         { LLOG_ORIGIN_CONNECT,           "llog_origin_connect" },
 102         { LLOG_CATINFO,                  "llog_catinfo" },
 103         { LLOG_ORIGIN_HANDLE_PREV_BLOCK, "llog_origin_handle_prev_block" },
 104         { LLOG_ORIGIN_HANDLE_DESTROY,    "llog_origin_handle_destroy" },
 105 };
 106
 107 const char* ll_opcode2str(__u32 opcode)
 108 {
 109         /* When one of the assertions below fail, chances are that:
 110          *     1) A new opcode was added in lustre_idl.h, but was
 111          *        is missing from the table above.
 112          * or  2) The opcode space was renumbered or rearranged,
 113          *        and the opcode_offset() function in
 114          *        ptlrpc_internal.h needs to be modified.
 115          */
 116         __u32 offset = opcode_offset(opcode);
 117         LASSERT(offset < LUSTRE_MAX_OPCODES);
 118         LASSERT(ll_rpc_opcode_table[offset].opcode == opcode);
 119         return ll_rpc_opcode_table[offset].opname;
 120 }
 121
 122 #ifdef LPROCFS
 123 void ptlrpc_lprocfs_register(struct proc_dir_entry *root, char *dir,
 124                              char *name, struct proc_dir_entry **procroot_ret,
 125                              struct lprocfs_stats **stats_ret)
 126 {
 127         struct proc_dir_entry *svc_procroot;
 128         struct lprocfs_stats *svc_stats;
 129         int i, rc;
 130         unsigned int svc_counter_config = LPROCFS_CNTR_AVGMINMAX |
 131                                           LPROCFS_CNTR_STDDEV;
 132
 133         LASSERT(*procroot_ret == NULL);
 134         LASSERT(*stats_ret == NULL);
 135
 136         svc_stats = lprocfs_alloc_stats(PTLRPC_LAST_CNTR + LUSTRE_MAX_OPCODES);
 137         if (svc_stats == NULL)
 138                 return;
 139
 140         if (dir) {
 141                 svc_procroot = lprocfs_register(dir, root, NULL, NULL);
 142                 if (IS_ERR(svc_procroot)) {
 143                         lprocfs_free_stats(&svc_stats);
 144                         return;
 145                 }
 146         } else {
 147                 svc_procroot = root;
 148         }
 149
 150         lprocfs_counter_init(svc_stats, PTLRPC_REQWAIT_CNTR,
 151                              svc_counter_config, "req_waittime", "usec");
 152         lprocfs_counter_init(svc_stats, PTLRPC_REQQDEPTH_CNTR,
 153                              svc_counter_config, "req_qdepth", "reqs");
 154         lprocfs_counter_init(svc_stats, PTLRPC_REQACTIVE_CNTR,
 155                              svc_counter_config, "req_active", "reqs");
 156         lprocfs_counter_init(svc_stats, PTLRPC_TIMEOUT,
 157                              svc_counter_config, "adaptive_timeout", "sec");
 158         lprocfs_counter_init(svc_stats, PTLRPC_REQBUF_AVAIL_CNTR,
 159                              svc_counter_config, "reqbuf_avail", "bufs");
 160         for (i = 0; i < LUSTRE_MAX_OPCODES; i++) {
 161                 __u32 opcode = ll_rpc_opcode_table[i].opcode;
 162                 lprocfs_counter_init(svc_stats, PTLRPC_LAST_CNTR + i,
 163                                      svc_counter_config, ll_opcode2str(opcode),
 164                                      "usec");
 165         }
 166
 167         rc = lprocfs_register_stats(svc_procroot, name, svc_stats);
 168         if (rc < 0) {
 169                 if (dir)
 170                         lprocfs_remove(&svc_procroot);
 171                 lprocfs_free_stats(&svc_stats);
 172         } else {
 173                 if (dir)
 174                         *procroot_ret = svc_procroot;
 175                 *stats_ret = svc_stats;
 176         }
 177 }
 178
 179 static int
 180 ptlrpc_lprocfs_read_req_history_len(char *page, char **start, off_t off,
 181                                     int count, int *eof, void *data)
 182 {
 183         struct ptlrpc_service *svc = data;
 184
 185         *eof = 1;
 186         return snprintf(page, count, "%d\n", svc->srv_n_history_rqbds);
 187 }
 188
 189 static int
 190 ptlrpc_lprocfs_read_req_history_max(char *page, char **start, off_t off,
 191                                     int count, int *eof, void *data)
 192 {
 193         struct ptlrpc_service *svc = data;
 194
 195         *eof = 1;
 196         return snprintf(page, count, "%d\n", svc->srv_max_history_rqbds);
 197 }
 198
 199 static int
 200 ptlrpc_lprocfs_write_req_history_max(struct file *file, const char *buffer,
 201                                      unsigned long count, void *data)
 202 {
 203         struct ptlrpc_service *svc = data;
 204         int                    bufpages;
 205         int                    val;
 206         int                    rc = lprocfs_write_helper(buffer, count, &val);
 207
 208         if (rc < 0)
 209                 return rc;
 210
 211         if (val < 0)
 212                 return -ERANGE;
 213
 214         /* This sanity check is more of an insanity check; we can still
 215          * hose a kernel by allowing the request history to grow too
 216          * far. */
 217         bufpages = (svc->srv_buf_size + CFS_PAGE_SIZE - 1) >> CFS_PAGE_SHIFT;
 218         if (val > num_physpages/(2*bufpages))
 219                 return -ERANGE;
 220
 221         spin_lock(&svc->srv_lock);
 222         svc->srv_max_history_rqbds = val;
 223         spin_unlock(&svc->srv_lock);
 224
 225         return count;
 226 }
 227
 228 struct ptlrpc_srh_iterator {
 229         __u64                  srhi_seq;
 230         struct ptlrpc_request *srhi_req;
 231 };
 232
 233 int
 234 ptlrpc_lprocfs_svc_req_history_seek(struct ptlrpc_service *svc,
 235                                     struct ptlrpc_srh_iterator *srhi,
 236                                     __u64 seq)
 237 {
 238         struct list_head      *e;
 239         struct ptlrpc_request *req;
 240
 241         if (srhi->srhi_req != NULL &&
 242             srhi->srhi_seq > svc->srv_request_max_cull_seq &&
 243             srhi->srhi_seq <= seq) {
 244                 /* If srhi_req was set previously, hasn't been culled and
 245                  * we're searching for a seq on or after it (i.e. more
 246                  * recent), search from it onwards.
 247                  * Since the service history is LRU (i.e. culled reqs will
 248                  * be near the head), we shouldn't have to do long
 249                  * re-scans */
 250                 LASSERT (srhi->srhi_seq == srhi->srhi_req->rq_history_seq);
 251                 LASSERT (!list_empty(&svc->srv_request_history));
 252                 e = &srhi->srhi_req->rq_history_list;
 253         } else {
 254                 /* search from start */
 255                 e = svc->srv_request_history.next;
 256         }
 257
 258         while (e != &svc->srv_request_history) {
 259                 req = list_entry(e, struct ptlrpc_request, rq_history_list);
 260
 261                 if (req->rq_history_seq >= seq) {
 262                         srhi->srhi_seq = req->rq_history_seq;
 263                         srhi->srhi_req = req;
 264                         return 0;
 265                 }
 266                 e = e->next;
 267         }
 268
 269         return -ENOENT;
 270 }
 271
 272 static void *
 273 ptlrpc_lprocfs_svc_req_history_start(struct seq_file *s, loff_t *pos)
 274 {
 275         struct ptlrpc_service       *svc = s->private;
 276         struct ptlrpc_srh_iterator  *srhi;
 277         int                          rc;
 278
 279         OBD_ALLOC(srhi, sizeof(*srhi));
 280         if (srhi == NULL)
 281                 return NULL;
 282
 283         srhi->srhi_seq = 0;
 284         srhi->srhi_req = NULL;
 285
 286         spin_lock(&svc->srv_lock);
 287         rc = ptlrpc_lprocfs_svc_req_history_seek(svc, srhi, *pos);
 288         spin_unlock(&svc->srv_lock);
 289
 290         if (rc == 0) {
 291                 *pos = srhi->srhi_seq;
 292                 return srhi;
 293         }
 294
 295         OBD_FREE(srhi, sizeof(*srhi));
 296         return NULL;
 297 }
 298
 299 static void
 300 ptlrpc_lprocfs_svc_req_history_stop(struct seq_file *s, void *iter)
 301 {
 302         struct ptlrpc_srh_iterator *srhi = iter;
 303
 304         if (srhi != NULL)
 305                 OBD_FREE(srhi, sizeof(*srhi));
 306 }
 307
 308 static void *
 309 ptlrpc_lprocfs_svc_req_history_next(struct seq_file *s,
 310                                     void *iter, loff_t *pos)
 311 {
 312         struct ptlrpc_service       *svc = s->private;
 313         struct ptlrpc_srh_iterator  *srhi = iter;
 314         int                          rc;
 315
 316         spin_lock(&svc->srv_lock);
 317         rc = ptlrpc_lprocfs_svc_req_history_seek(svc, srhi, *pos + 1);
 318         spin_unlock(&svc->srv_lock);
 319
 320         if (rc != 0) {
 321                 OBD_FREE(srhi, sizeof(*srhi));
 322                 return NULL;
 323         }
 324
 325         *pos = srhi->srhi_seq;
 326         return srhi;
 327 }
 328
 329 static int ptlrpc_lprocfs_svc_req_history_show(struct seq_file *s, void *iter)
 330 {
 331         struct ptlrpc_service      *svc = s->private;
 332         struct ptlrpc_srh_iterator *srhi = iter;
 333         struct ptlrpc_request      *req;
 334         int                         rc;
 335
 336         spin_lock(&svc->srv_lock);
 337
 338         rc = ptlrpc_lprocfs_svc_req_history_seek(svc, srhi, srhi->srhi_seq);
 339
 340         if (rc == 0) {
 341                 req = srhi->srhi_req;
 342
 343                 /* Print common req fields.
 344                  * CAVEAT EMPTOR: we're racing with the service handler
 345                  * here.  The request could contain any old crap, so you
 346                  * must be just as careful as the service's request
 347                  * parser. Currently I only print stuff here I know is OK
 348                  * to look at coz it was set up in request_in_callback()!!! */
 349                 seq_printf(s, LPD64":%s:%s:"LPD64":%d:%s ",
 350                            req->rq_history_seq, libcfs_nid2str(req->rq_self),
 351                            libcfs_id2str(req->rq_peer), req->rq_xid,
 352                            req->rq_reqlen,ptlrpc_rqphase2str(req));
 353
 354                 if (svc->srv_request_history_print_fn == NULL)
 355                         seq_printf(s, "\n");
 356                 else
 357                         svc->srv_request_history_print_fn(s, srhi->srhi_req);
 358         }
 359
 360         spin_unlock(&svc->srv_lock);
 361
 362         return rc;
 363 }
 364
 365 static int
 366 ptlrpc_lprocfs_svc_req_history_open(struct inode *inode, struct file *file)
 367 {
 368         static struct seq_operations sops = {
 369                 .start = ptlrpc_lprocfs_svc_req_history_start,
 370                 .stop  = ptlrpc_lprocfs_svc_req_history_stop,
 371                 .next  = ptlrpc_lprocfs_svc_req_history_next,
 372                 .show  = ptlrpc_lprocfs_svc_req_history_show,
 373         };
 374         struct proc_dir_entry *dp = PDE(inode);
 375         struct seq_file       *seqf;
 376         int                    rc;
 377
 378         LPROCFS_ENTRY_AND_CHECK(dp);
 379         rc = seq_open(file, &sops);
 380         if (rc) {
 381                 LPROCFS_EXIT();
 382                 return rc;
 383         }
 384
 385         seqf = file->private_data;
 386         seqf->private = dp->data;
 387         return 0;
 388 }
 389
 390 /* See also lprocfs_rd_timeouts */
 391 static int ptlrpc_lprocfs_rd_timeouts(char *page, char **start, off_t off,
 392                                       int count, int *eof, void *data)
 393 {
 394         struct ptlrpc_service *svc = data;
 395         unsigned int cur, worst;
 396         time_t worstt;
 397         struct dhms ts;
 398         int rc = 0;
 399
 400         *eof = 1;
 401         cur = at_get(&svc->srv_at_estimate);
 402         worst = svc->srv_at_estimate.at_worst_ever;
 403         worstt = svc->srv_at_estimate.at_worst_time;
 404         s2dhms(&ts, cfs_time_current_sec() - worstt);
 405         if (AT_OFF)
 406                 rc += snprintf(page + rc, count - rc,
 407                               "adaptive timeouts off, using obd_timeout %u\n",
 408                               obd_timeout);
 409         rc += snprintf(page + rc, count - rc,
 410                        "%10s : cur %3u  worst %3u (at %ld, "DHMS_FMT" ago) ",
 411                        "service", cur, worst, worstt,
 412                        DHMS_VARS(&ts));
 413         rc = lprocfs_at_hist_helper(page, count, rc,
 414                                     &svc->srv_at_estimate);
 415         return rc;
 416 }
 417
 418 void ptlrpc_lprocfs_register_service(struct proc_dir_entry *entry,
 419                                      struct ptlrpc_service *svc)
 420 {
 421         struct lprocfs_vars lproc_vars[] = {
 422                 {.name       = "req_buffer_history_len",
 423                  .write_fptr = NULL,
 424                  .read_fptr  = ptlrpc_lprocfs_read_req_history_len,
 425                  .data       = svc},
 426                 {.name       = "req_buffer_history_max",
 427                  .write_fptr = ptlrpc_lprocfs_write_req_history_max,
 428                  .read_fptr  = ptlrpc_lprocfs_read_req_history_max,
 429                  .data       = svc},
 430                 {.name       = "timeouts",
 431                  .read_fptr  = ptlrpc_lprocfs_rd_timeouts,
 432                  .data       = svc},
 433                 {NULL}
 434         };
 435         static struct file_operations req_history_fops = {
 436                 .owner       = THIS_MODULE,
 437                 .open        = ptlrpc_lprocfs_svc_req_history_open,
 438                 .read        = seq_read,
 439                 .llseek      = seq_lseek,
 440                 .release     = lprocfs_seq_release,
 441         };
 442         struct proc_dir_entry *req_history;
 443
 444         ptlrpc_lprocfs_register(entry, svc->srv_name,
 445                                 "stats", &svc->srv_procroot,
 446                                 &svc->srv_stats);
 447
 448         if (svc->srv_procroot == NULL)
 449                 return;
 450
 451         lprocfs_add_vars(svc->srv_procroot, lproc_vars, NULL);
 452
 453         req_history = create_proc_entry("req_history", 0400,
 454                                         svc->srv_procroot);
 455         if (req_history != NULL) {
 456                 req_history->data = svc;
 457                 req_history->proc_fops = &req_history_fops;
 458         }
 459 }
 460
 461 void ptlrpc_lprocfs_register_obd(struct obd_device *obddev)
 462 {
 463         ptlrpc_lprocfs_register(obddev->obd_proc_entry, NULL, "stats",
 464                                 &obddev->obd_svc_procroot,
 465                                 &obddev->obd_svc_stats);
 466 }
 467 EXPORT_SYMBOL(ptlrpc_lprocfs_register_obd);
 468
 469 void ptlrpc_lprocfs_rpc_sent(struct ptlrpc_request *req)
 470 {
 471         struct lprocfs_stats *svc_stats;
 472         int opc = opcode_offset(lustre_msg_get_opc(req->rq_reqmsg));
 473
 474         svc_stats = req->rq_import->imp_obd->obd_svc_stats;
 475         if (svc_stats == NULL || opc <= 0)
 476                 return;
 477         LASSERT(opc < LUSTRE_MAX_OPCODES);
 478         /* These two use the ptlrpc_lprocfs_brw below */
 479         if (!(opc == OST_WRITE || opc == OST_READ))
 480                 lprocfs_counter_add(svc_stats, opc + PTLRPC_LAST_CNTR, 0);
 481 }
 482
 483 void ptlrpc_lprocfs_brw(struct ptlrpc_request *req, int opc, int bytes)
 484 {
 485         struct lprocfs_stats *svc_stats;
 486         svc_stats = req->rq_import->imp_obd->obd_svc_stats;
 487         if (!svc_stats)
 488                 return;
 489         lprocfs_counter_add(svc_stats, opc + PTLRPC_LAST_CNTR, bytes);
 490 }
 491 EXPORT_SYMBOL(ptlrpc_lprocfs_brw);
 492
 493 void ptlrpc_lprocfs_unregister_service(struct ptlrpc_service *svc)
 494 {
 495         if (svc->srv_procroot != NULL)
 496                 lprocfs_remove(&svc->srv_procroot);
 497         if (svc->srv_stats)
 498                 lprocfs_free_stats(&svc->srv_stats);
 499 }
 500
 501 void ptlrpc_lprocfs_unregister_obd(struct obd_device *obd)
 502 {
 503         if (obd->obd_svc_procroot)
 504                 lprocfs_remove(&obd->obd_svc_procroot);
 505         if (obd->obd_svc_stats)
 506                 lprocfs_free_stats(&obd->obd_svc_stats);
 507 }
 508 EXPORT_SYMBOL(ptlrpc_lprocfs_unregister_obd);
 509
 510
 511 int lprocfs_wr_evict_client(struct file *file, const char *buffer,
 512                             unsigned long count, void *data)
 513 {
 514         struct obd_device *obd = data;
 515         char tmpbuf[sizeof(struct obd_uuid)];
 516
 517         /* Kludge code(deadlock situation): the lprocfs lock has been held
 518          * since the client is evicted by writting client's
 519          * uuid/nid to procfs "evict_client" entry. However,
 520          * obd_export_evict_by_uuid() will call lprocfs_remove() to destroy
 521          * the proc entries under the being destroyed export{}, so I have
 522          * to drop the lock at first here.
 523          * - jay, jxiong@clusterfs.com */
 524         class_incref(obd);
 525         LPROCFS_EXIT();
 526
 527         sscanf(buffer, "%40s", tmpbuf);
 528         if (strncmp(tmpbuf, "nid:", 4) == 0)
 529                 obd_export_evict_by_nid(obd, tmpbuf + 4);
 530         else if (strncmp(tmpbuf, "uuid:", 5) == 0)
 531                 obd_export_evict_by_uuid(obd, tmpbuf + 5);
 532         else
 533                 obd_export_evict_by_uuid(obd, tmpbuf);
 534
 535         LPROCFS_ENTRY();
 536         class_decref(obd);
 537
 538         return count;
 539 }
 540 EXPORT_SYMBOL(lprocfs_wr_evict_client);
 541
 542 int lprocfs_wr_ping(struct file *file, const char *buffer,
 543                     unsigned long count, void *data)
 544 {
 545         struct obd_device *obd = data;
 546         struct ptlrpc_request *req;
 547         int rc;
 548         ENTRY;
 549
 550         LPROCFS_CLIMP_CHECK(obd);
 551         req = ptlrpc_prep_req(obd->u.cli.cl_import, LUSTRE_OBD_VERSION,
 552                               OBD_PING, 1, NULL, NULL);
 553         LPROCFS_CLIMP_EXIT(obd);
 554         if (req == NULL)
 555                 RETURN(-ENOMEM);
 556
 557         ptlrpc_req_set_repsize(req, 1, NULL);
 558         req->rq_send_state = LUSTRE_IMP_FULL;
 559         req->rq_no_resend = 1;
 560
 561         rc = ptlrpc_queue_wait(req);
 562
 563         ptlrpc_req_finished(req);
 564         if (rc >= 0)
 565                 RETURN(count);
 566         RETURN(rc);
 567 }
 568 EXPORT_SYMBOL(lprocfs_wr_ping);
 569
 570 #endif /* LPROCFS */