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         { OST_QUOTA_ADJUST_QUNIT, "ost_quota_adjust_qunit" },
  65         { MDS_GETATTR,      "mds_getattr" },
  66         { MDS_GETATTR_NAME, "mds_getattr_lock" },
  67         { MDS_CLOSE,        "mds_close" },
  68         { MDS_REINT,        "mds_reint" },
  69         { MDS_READPAGE,     "mds_readpage" },
  70         { MDS_CONNECT,      "mds_connect" },
  71         { MDS_DISCONNECT,   "mds_disconnect" },
  72         { MDS_GETSTATUS,    "mds_getstatus" },
  73         { MDS_STATFS,       "mds_statfs" },
  74         { MDS_PIN,          "mds_pin" },
  75         { MDS_UNPIN,        "mds_unpin" },
  76         { MDS_SYNC,         "mds_sync" },
  77         { MDS_DONE_WRITING, "mds_done_writing" },
  78         { MDS_SET_INFO,     "mds_set_info" },
  79         { MDS_QUOTACHECK,   "mds_quotacheck" },
  80         { MDS_QUOTACTL,     "mds_quotactl" },
  81         { MDS_GETXATTR,     "mds_getxattr" },
  82         { MDS_SETXATTR,     "mds_setxattr" },
  83         { LDLM_ENQUEUE,     "ldlm_enqueue" },
  84         { LDLM_CONVERT,     "ldlm_convert" },
  85         { LDLM_CANCEL,      "ldlm_cancel" },
  86         { LDLM_BL_CALLBACK, "ldlm_bl_callback" },
  87         { LDLM_CP_CALLBACK, "ldlm_cp_callback" },
  88         { LDLM_GL_CALLBACK, "ldlm_gl_callback" },
  89         { MGS_CONNECT,      "mgs_connect" },
  90         { MGS_DISCONNECT,   "mgs_disconnect" },
  91         { MGS_EXCEPTION,    "mgs_exception" },
  92         { MGS_TARGET_REG,   "mgs_target_reg" },
  93         { MGS_TARGET_DEL,   "mgs_target_del" },
  94         { MGS_SET_INFO,     "mgs_set_info" },
  95         { OBD_PING,         "obd_ping" },
  96         { OBD_LOG_CANCEL,   "llog_origin_handle_cancel" },
  97         { OBD_QC_CALLBACK,  "obd_quota_callback" },
  98         { LLOG_ORIGIN_HANDLE_CREATE,     "llog_origin_handle_create" },
  99         { LLOG_ORIGIN_HANDLE_NEXT_BLOCK, "llog_origin_handle_next_block"},
 100         { LLOG_ORIGIN_HANDLE_READ_HEADER,"llog_origin_handle_read_header" },
 101         { LLOG_ORIGIN_HANDLE_WRITE_REC,  "llog_origin_handle_write_rec" },
 102         { LLOG_ORIGIN_HANDLE_CLOSE,      "llog_origin_handle_close" },
 103         { LLOG_ORIGIN_CONNECT,           "llog_origin_connect" },
 104         { LLOG_CATINFO,                  "llog_catinfo" },
 105         { LLOG_ORIGIN_HANDLE_PREV_BLOCK, "llog_origin_handle_prev_block" },
 106         { LLOG_ORIGIN_HANDLE_DESTROY,    "llog_origin_handle_destroy" },
 107 };
 108
 109 struct ll_eopcode {
 110      __u32       opcode;
 111      const char *opname;
 112 } ll_eopcode_table[EXTRA_LAST_OPC] = {
 113         { LDLM_GLIMPSE_ENQUEUE, "ldlm_glimpse_enqueue" },
 114         { LDLM_PLAIN_ENQUEUE,   "ldlm_plain_enqueue" },
 115         { LDLM_EXTENT_ENQUEUE,  "ldlm_extent_enqueue" },
 116         { LDLM_FLOCK_ENQUEUE,   "ldlm_flock_enqueue" },
 117         { LDLM_IBITS_ENQUEUE,   "ldlm_ibits_enqueue" },
 118         { MDS_REINT_CREATE,     "mds_reint_create" },
 119         { MDS_REINT_LINK,       "mds_reint_link" },
 120         { MDS_REINT_OPEN,       "mds_reint_open" },
 121         { MDS_REINT_SETATTR,    "mds_reint_setattr" },
 122         { MDS_REINT_RENAME,     "mds_reint_rename" },
 123         { MDS_REINT_UNLINK,     "mds_reint_unlink" }
 124 };
 125
 126 const char *ll_opcode2str(__u32 opcode)
 127 {
 128         /* When one of the assertions below fail, chances are that:
 129          *     1) A new opcode was added in lustre_idl.h, but was
 130          *        is missing from the table above.
 131          * or  2) The opcode space was renumbered or rearranged,
 132          *        and the opcode_offset() function in
 133          *        ptlrpc_internal.h needs to be modified.
 134          */
 135         __u32 offset = opcode_offset(opcode);
 136         LASSERT(offset < LUSTRE_MAX_OPCODES);
 137         LASSERT(ll_rpc_opcode_table[offset].opcode == opcode);
 138         return ll_rpc_opcode_table[offset].opname;
 139 }
 140
 141 const char* ll_eopcode2str(__u32 opcode)
 142 {
 143         LASSERT(ll_eopcode_table[opcode].opcode == opcode);
 144         return ll_eopcode_table[opcode].opname;
 145 }
 146 #ifdef LPROCFS
 147 void ptlrpc_lprocfs_register(struct proc_dir_entry *root, char *dir,
 148                              char *name, struct proc_dir_entry **procroot_ret,
 149                              struct lprocfs_stats **stats_ret)
 150 {
 151         struct proc_dir_entry *svc_procroot;
 152         struct lprocfs_stats *svc_stats;
 153         int i, rc;
 154         unsigned int svc_counter_config = LPROCFS_CNTR_AVGMINMAX |
 155                                           LPROCFS_CNTR_STDDEV;
 156
 157         LASSERT(*procroot_ret == NULL);
 158         LASSERT(*stats_ret == NULL);
 159
 160         svc_stats = lprocfs_alloc_stats(EXTRA_MAX_OPCODES + LUSTRE_MAX_OPCODES, 0);
 161         if (svc_stats == NULL)
 162                 return;
 163
 164         if (dir) {
 165                 svc_procroot = lprocfs_register(dir, root, NULL, NULL);
 166                 if (IS_ERR(svc_procroot)) {
 167                         lprocfs_free_stats(&svc_stats);
 168                         return;
 169                 }
 170         } else {
 171                 svc_procroot = root;
 172         }
 173
 174         lprocfs_counter_init(svc_stats, PTLRPC_REQWAIT_CNTR,
 175                              svc_counter_config, "req_waittime", "usec");
 176         lprocfs_counter_init(svc_stats, PTLRPC_REQQDEPTH_CNTR,
 177                              svc_counter_config, "req_qdepth", "reqs");
 178         lprocfs_counter_init(svc_stats, PTLRPC_REQACTIVE_CNTR,
 179                              svc_counter_config, "req_active", "reqs");
 180         lprocfs_counter_init(svc_stats, PTLRPC_TIMEOUT,
 181                              svc_counter_config, "req_timeout", "sec");
 182         lprocfs_counter_init(svc_stats, PTLRPC_REQBUF_AVAIL_CNTR,
 183                              svc_counter_config, "reqbuf_avail", "bufs");
 184         for (i = 0; i < EXTRA_LAST_OPC; i++) {
 185                 lprocfs_counter_init(svc_stats, PTLRPC_LAST_CNTR + i,
 186                                      svc_counter_config,
 187                                      ll_eopcode2str(i), "reqs");
 188         }
 189         for (i = 0; i < LUSTRE_MAX_OPCODES; i++) {
 190                 __u32 opcode = ll_rpc_opcode_table[i].opcode;
 191                 lprocfs_counter_init(svc_stats,
 192                                      EXTRA_MAX_OPCODES + i, svc_counter_config,
 193                                      ll_opcode2str(opcode), "usec");
 194         }
 195
 196         rc = lprocfs_register_stats(svc_procroot, name, svc_stats);
 197         if (rc < 0) {
 198                 if (dir)
 199                         lprocfs_remove(&svc_procroot);
 200                 lprocfs_free_stats(&svc_stats);
 201         } else {
 202                 if (dir)
 203                         *procroot_ret = svc_procroot;
 204                 *stats_ret = svc_stats;
 205         }
 206 }
 207
 208 static int
 209 ptlrpc_lprocfs_read_req_history_len(char *page, char **start, off_t off,
 210                                     int count, int *eof, void *data)
 211 {
 212         struct ptlrpc_service *svc = data;
 213
 214         *eof = 1;
 215         return snprintf(page, count, "%d\n", svc->srv_n_history_rqbds);
 216 }
 217
 218 static int
 219 ptlrpc_lprocfs_read_req_history_max(char *page, char **start, off_t off,
 220                                     int count, int *eof, void *data)
 221 {
 222         struct ptlrpc_service *svc = data;
 223
 224         *eof = 1;
 225         return snprintf(page, count, "%d\n", svc->srv_max_history_rqbds);
 226 }
 227
 228 static int
 229 ptlrpc_lprocfs_write_req_history_max(struct file *file, const char *buffer,
 230                                      unsigned long count, void *data)
 231 {
 232         struct ptlrpc_service *svc = data;
 233         int                    bufpages;
 234         int                    val;
 235         int                    rc = lprocfs_write_helper(buffer, count, &val);
 236
 237         if (rc < 0)
 238                 return rc;
 239
 240         if (val < 0)
 241                 return -ERANGE;
 242
 243         /* This sanity check is more of an insanity check; we can still
 244          * hose a kernel by allowing the request history to grow too
 245          * far. */
 246         bufpages = (svc->srv_buf_size + CFS_PAGE_SIZE - 1) >> CFS_PAGE_SHIFT;
 247         if (val > num_physpages/(2*bufpages))
 248                 return -ERANGE;
 249
 250         spin_lock(&svc->srv_lock);
 251         svc->srv_max_history_rqbds = val;
 252         spin_unlock(&svc->srv_lock);
 253
 254         return count;
 255 }
 256
 257 struct ptlrpc_srh_iterator {
 258         __u64                  srhi_seq;
 259         struct ptlrpc_request *srhi_req;
 260 };
 261
 262 int
 263 ptlrpc_lprocfs_svc_req_history_seek(struct ptlrpc_service *svc,
 264                                     struct ptlrpc_srh_iterator *srhi,
 265                                     __u64 seq)
 266 {
 267         struct list_head      *e;
 268         struct ptlrpc_request *req;
 269
 270         if (srhi->srhi_req != NULL &&
 271             srhi->srhi_seq > svc->srv_request_max_cull_seq &&
 272             srhi->srhi_seq <= seq) {
 273                 /* If srhi_req was set previously, hasn't been culled and
 274                  * we're searching for a seq on or after it (i.e. more
 275                  * recent), search from it onwards.
 276                  * Since the service history is LRU (i.e. culled reqs will
 277                  * be near the head), we shouldn't have to do long
 278                  * re-scans */
 279                 LASSERT (srhi->srhi_seq == srhi->srhi_req->rq_history_seq);
 280                 LASSERT (!list_empty(&svc->srv_request_history));
 281                 e = &srhi->srhi_req->rq_history_list;
 282         } else {
 283                 /* search from start */
 284                 e = svc->srv_request_history.next;
 285         }
 286
 287         while (e != &svc->srv_request_history) {
 288                 req = list_entry(e, struct ptlrpc_request, rq_history_list);
 289
 290                 if (req->rq_history_seq >= seq) {
 291                         srhi->srhi_seq = req->rq_history_seq;
 292                         srhi->srhi_req = req;
 293                         return 0;
 294                 }
 295                 e = e->next;
 296         }
 297
 298         return -ENOENT;
 299 }
 300
 301 static void *
 302 ptlrpc_lprocfs_svc_req_history_start(struct seq_file *s, loff_t *pos)
 303 {
 304         struct ptlrpc_service       *svc = s->private;
 305         struct ptlrpc_srh_iterator  *srhi;
 306         int                          rc;
 307
 308         OBD_ALLOC(srhi, sizeof(*srhi));
 309         if (srhi == NULL)
 310                 return NULL;
 311
 312         srhi->srhi_seq = 0;
 313         srhi->srhi_req = NULL;
 314
 315         spin_lock(&svc->srv_lock);
 316         rc = ptlrpc_lprocfs_svc_req_history_seek(svc, srhi, *pos);
 317         spin_unlock(&svc->srv_lock);
 318
 319         if (rc == 0) {
 320                 *pos = srhi->srhi_seq;
 321                 return srhi;
 322         }
 323
 324         OBD_FREE(srhi, sizeof(*srhi));
 325         return NULL;
 326 }
 327
 328 static void
 329 ptlrpc_lprocfs_svc_req_history_stop(struct seq_file *s, void *iter)
 330 {
 331         struct ptlrpc_srh_iterator *srhi = iter;
 332
 333         if (srhi != NULL)
 334                 OBD_FREE(srhi, sizeof(*srhi));
 335 }
 336
 337 static void *
 338 ptlrpc_lprocfs_svc_req_history_next(struct seq_file *s,
 339                                     void *iter, loff_t *pos)
 340 {
 341         struct ptlrpc_service       *svc = s->private;
 342         struct ptlrpc_srh_iterator  *srhi = iter;
 343         int                          rc;
 344
 345         spin_lock(&svc->srv_lock);
 346         rc = ptlrpc_lprocfs_svc_req_history_seek(svc, srhi, *pos + 1);
 347         spin_unlock(&svc->srv_lock);
 348
 349         if (rc != 0) {
 350                 OBD_FREE(srhi, sizeof(*srhi));
 351                 return NULL;
 352         }
 353
 354         *pos = srhi->srhi_seq;
 355         return srhi;
 356 }
 357
 358 /* common ost/mdt srv_request_history_print_fn */
 359 void target_print_req(void *seq_file, struct ptlrpc_request *req)
 360 {
 361         /* Called holding srv_lock with irqs disabled.
 362          * Print specific req contents and a newline.
 363          * CAVEAT EMPTOR: check request message length before printing!!!
 364          * You might have received any old crap so you must be just as
 365          * careful here as the service's request parser!!! */
 366         struct seq_file *sf = seq_file;
 367
 368         switch (req->rq_phase) {
 369         case RQ_PHASE_NEW:
 370                 /* still awaiting a service thread's attention, or rejected
 371                  * because the generic request message didn't unpack */
 372                 seq_printf(sf, "<not swabbed>\n");
 373                 break;
 374         case RQ_PHASE_INTERPRET:
 375                 /* being handled, so basic msg swabbed, and opc is valid
 376                  * but racing with mds_handle() */
 377         case RQ_PHASE_COMPLETE:
 378                 /* been handled by mds_handle() reply state possibly still
 379                  * volatile */
 380                 seq_printf(sf, "opc %d\n", lustre_msg_get_opc(req->rq_reqmsg));
 381                 break;
 382         default:
 383                 DEBUG_REQ(D_ERROR, req, "bad phase %d", req->rq_phase);
 384         }
 385 }
 386 EXPORT_SYMBOL(target_print_req);
 387
 388 static int ptlrpc_lprocfs_svc_req_history_show(struct seq_file *s, void *iter)
 389 {
 390         struct ptlrpc_service      *svc = s->private;
 391         struct ptlrpc_srh_iterator *srhi = iter;
 392         struct ptlrpc_request      *req;
 393         int                         rc;
 394
 395         spin_lock(&svc->srv_lock);
 396
 397         rc = ptlrpc_lprocfs_svc_req_history_seek(svc, srhi, srhi->srhi_seq);
 398
 399         if (rc == 0) {
 400                 req = srhi->srhi_req;
 401
 402                 /* Print common req fields.
 403                  * CAVEAT EMPTOR: we're racing with the service handler
 404                  * here.  The request could contain any old crap, so you
 405                  * must be just as careful as the service's request
 406                  * parser. Currently I only print stuff here I know is OK
 407                  * to look at coz it was set up in request_in_callback()!!! */
 408                 seq_printf(s, LPD64":%s:%s:x"LPD64":%d:%s:%ld:%lds(%+lds) ",
 409                            req->rq_history_seq, libcfs_nid2str(req->rq_self),
 410                            libcfs_id2str(req->rq_peer), req->rq_xid,
 411                            req->rq_reqlen, ptlrpc_rqphase2str(req),
 412                            req->rq_arrival_time.tv_sec,
 413                            req->rq_sent - req->rq_arrival_time.tv_sec,
 414                            req->rq_sent - req->rq_deadline);
 415                 if (svc->srv_request_history_print_fn == NULL)
 416                         seq_printf(s, "\n");
 417                 else
 418                         svc->srv_request_history_print_fn(s, srhi->srhi_req);
 419         }
 420
 421         spin_unlock(&svc->srv_lock);
 422
 423         return rc;
 424 }
 425
 426 static int
 427 ptlrpc_lprocfs_svc_req_history_open(struct inode *inode, struct file *file)
 428 {
 429         static struct seq_operations sops = {
 430                 .start = ptlrpc_lprocfs_svc_req_history_start,
 431                 .stop  = ptlrpc_lprocfs_svc_req_history_stop,
 432                 .next  = ptlrpc_lprocfs_svc_req_history_next,
 433                 .show  = ptlrpc_lprocfs_svc_req_history_show,
 434         };
 435         struct proc_dir_entry *dp = PDE(inode);
 436         struct seq_file       *seqf;
 437         int                    rc;
 438
 439         LPROCFS_ENTRY_AND_CHECK(dp);
 440         rc = seq_open(file, &sops);
 441         if (rc) {
 442                 LPROCFS_EXIT();
 443                 return rc;
 444         }
 445
 446         seqf = file->private_data;
 447         seqf->private = dp->data;
 448         return 0;
 449 }
 450
 451 /* See also lprocfs_rd_timeouts */
 452 static int ptlrpc_lprocfs_rd_timeouts(char *page, char **start, off_t off,
 453                                       int count, int *eof, void *data)
 454 {
 455         struct ptlrpc_service *svc = data;
 456         unsigned int cur, worst;
 457         time_t worstt;
 458         struct dhms ts;
 459         int rc = 0;
 460
 461         *eof = 1;
 462         cur = at_get(&svc->srv_at_estimate);
 463         worst = svc->srv_at_estimate.at_worst_ever;
 464         worstt = svc->srv_at_estimate.at_worst_time;
 465         s2dhms(&ts, cfs_time_current_sec() - worstt);
 466         if (AT_OFF)
 467                 rc += snprintf(page + rc, count - rc,
 468                               "adaptive timeouts off, using obd_timeout %u\n",
 469                               obd_timeout);
 470         rc += snprintf(page + rc, count - rc,
 471                        "%10s : cur %3u  worst %3u (at %ld, "DHMS_FMT" ago) ",
 472                        "service", cur, worst, worstt,
 473                        DHMS_VARS(&ts));
 474         rc = lprocfs_at_hist_helper(page, count, rc,
 475                                     &svc->srv_at_estimate);
 476         return rc;
 477 }
 478
 479 void ptlrpc_lprocfs_register_service(struct proc_dir_entry *entry,
 480                                      struct ptlrpc_service *svc)
 481 {
 482         struct lprocfs_vars lproc_vars[] = {
 483                 {.name       = "req_buffer_history_len",
 484                  .write_fptr = NULL,
 485                  .read_fptr  = ptlrpc_lprocfs_read_req_history_len,
 486                  .data       = svc},
 487                 {.name       = "req_buffer_history_max",
 488                  .write_fptr = ptlrpc_lprocfs_write_req_history_max,
 489                  .read_fptr  = ptlrpc_lprocfs_read_req_history_max,
 490                  .data       = svc},
 491                 {.name       = "timeouts",
 492                  .read_fptr  = ptlrpc_lprocfs_rd_timeouts,
 493                  .data       = svc},
 494                 {NULL}
 495         };
 496         static struct file_operations req_history_fops = {
 497                 .owner       = THIS_MODULE,
 498                 .open        = ptlrpc_lprocfs_svc_req_history_open,
 499                 .read        = seq_read,
 500                 .llseek      = seq_lseek,
 501                 .release     = lprocfs_seq_release,
 502         };
 503         struct proc_dir_entry *req_history;
 504
 505         ptlrpc_lprocfs_register(entry, svc->srv_name,
 506                                 "stats", &svc->srv_procroot,
 507                                 &svc->srv_stats);
 508
 509         if (svc->srv_procroot == NULL)
 510                 return;
 511
 512         lprocfs_add_vars(svc->srv_procroot, lproc_vars, NULL);
 513
 514         req_history = create_proc_entry("req_history", 0400,
 515                                         svc->srv_procroot);
 516         if (req_history != NULL) {
 517                 req_history->data = svc;
 518                 req_history->proc_fops = &req_history_fops;
 519         }
 520 }
 521
 522 void ptlrpc_lprocfs_register_obd(struct obd_device *obddev)
 523 {
 524         ptlrpc_lprocfs_register(obddev->obd_proc_entry, NULL, "stats",
 525                                 &obddev->obd_svc_procroot,
 526                                 &obddev->obd_svc_stats);
 527 }
 528 EXPORT_SYMBOL(ptlrpc_lprocfs_register_obd);
 529
 530 void ptlrpc_lprocfs_rpc_sent(struct ptlrpc_request *req)
 531 {
 532         struct lprocfs_stats *svc_stats;
 533         __u32 op = lustre_msg_get_opc(req->rq_reqmsg);
 534         int opc = opcode_offset(op);
 535
 536         svc_stats = req->rq_import->imp_obd->obd_svc_stats;
 537         if (svc_stats == NULL || opc <= 0)
 538                 return;
 539         LASSERT(opc < LUSTRE_MAX_OPCODES);
 540         /* These two use the ptlrpc_lprocfs_brw below */
 541         if (!(opc == OST_WRITE || opc == OST_READ || op == LDLM_ENQUEUE
 542               || op == MDS_REINT))
 543                 lprocfs_counter_add(svc_stats, opc + EXTRA_MAX_OPCODES, 0);
 544 }
 545
 546 void ptlrpc_lprocfs_brw(struct ptlrpc_request *req, int opc, int bytes)
 547 {
 548         struct lprocfs_stats *svc_stats;
 549         svc_stats = req->rq_import->imp_obd->obd_svc_stats;
 550         if (!svc_stats)
 551                 return;
 552         lprocfs_counter_add(svc_stats, opc + EXTRA_MAX_OPCODES, bytes);
 553 }
 554 EXPORT_SYMBOL(ptlrpc_lprocfs_brw);
 555
 556 void ptlrpc_lprocfs_unregister_service(struct ptlrpc_service *svc)
 557 {
 558         if (svc->srv_procroot != NULL)
 559                 lprocfs_remove(&svc->srv_procroot);
 560         if (svc->srv_stats)
 561                 lprocfs_free_stats(&svc->srv_stats);
 562 }
 563
 564 void ptlrpc_lprocfs_unregister_obd(struct obd_device *obd)
 565 {
 566         if (obd->obd_svc_procroot)
 567                 lprocfs_remove(&obd->obd_svc_procroot);
 568         if (obd->obd_svc_stats)
 569                 lprocfs_free_stats(&obd->obd_svc_stats);
 570 }
 571 EXPORT_SYMBOL(ptlrpc_lprocfs_unregister_obd);
 572
 573
 574 int lprocfs_wr_evict_client(struct file *file, const char *buffer,
 575                             unsigned long count, void *data)
 576 {
 577         struct obd_device *obd = data;
 578         char tmpbuf[sizeof(struct obd_uuid)];
 579
 580         /* Kludge code(deadlock situation): the lprocfs lock has been held
 581          * since the client is evicted by writting client's
 582          * uuid/nid to procfs "evict_client" entry. However,
 583          * obd_export_evict_by_uuid() will call lprocfs_remove() to destroy
 584          * the proc entries under the being destroyed export{}, so I have
 585          * to drop the lock at first here.
 586          * - jay, jxiong@clusterfs.com */
 587         class_incref(obd);
 588         LPROCFS_EXIT();
 589
 590         sscanf(buffer, "%40s", tmpbuf);
 591         if (strncmp(tmpbuf, "nid:", 4) == 0)
 592                 obd_export_evict_by_nid(obd, tmpbuf + 4);
 593         else if (strncmp(tmpbuf, "uuid:", 5) == 0)
 594                 obd_export_evict_by_uuid(obd, tmpbuf + 5);
 595         else
 596                 obd_export_evict_by_uuid(obd, tmpbuf);
 597
 598         LPROCFS_ENTRY();
 599         class_decref(obd);
 600
 601         return count;
 602 }
 603 EXPORT_SYMBOL(lprocfs_wr_evict_client);
 604
 605 int lprocfs_wr_ping(struct file *file, const char *buffer,
 606                     unsigned long count, void *data)
 607 {
 608         struct obd_device *obd = data;
 609         struct ptlrpc_request *req;
 610         int rc;
 611         ENTRY;
 612
 613         LPROCFS_CLIMP_CHECK(obd);
 614         req = ptlrpc_prep_req(obd->u.cli.cl_import, LUSTRE_OBD_VERSION,
 615                               OBD_PING, 1, NULL, NULL);
 616         LPROCFS_CLIMP_EXIT(obd);
 617         if (req == NULL)
 618                 RETURN(-ENOMEM);
 619
 620         ptlrpc_req_set_repsize(req, 1, NULL);
 621         req->rq_send_state = LUSTRE_IMP_FULL;
 622         req->rq_no_resend = 1;
 623
 624         rc = ptlrpc_queue_wait(req);
 625
 626         ptlrpc_req_finished(req);
 627         if (rc >= 0)
 628                 RETURN(count);
 629         RETURN(rc);
 630 }
 631 EXPORT_SYMBOL(lprocfs_wr_ping);
 632
 633 #endif /* LPROCFS */