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  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   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.
  11  *
  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).
  17  *
  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
  21  *
  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
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36 #define DEBUG_SUBSYSTEM S_CLASS
  37
  38 #ifndef __KERNEL__
  39 # include <liblustre.h>
  40 #endif
  41
  42 #include <obd_support.h>
  43 #include <obd.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"
  49
  50
  51 struct ll_rpc_opcode {
  52      __u32       opcode;
  53      const char *opname;
  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         { LDLM_ENQUEUE,     "ldlm_enqueue" },
  97         { LDLM_CONVERT,     "ldlm_convert" },
  98         { LDLM_CANCEL,      "ldlm_cancel" },
  99         { LDLM_BL_CALLBACK, "ldlm_bl_callback" },
 100         { LDLM_CP_CALLBACK, "ldlm_cp_callback" },
 101         { LDLM_GL_CALLBACK, "ldlm_gl_callback" },
 102         { MGS_CONNECT,      "mgs_connect" },
 103         { MGS_DISCONNECT,   "mgs_disconnect" },
 104         { MGS_EXCEPTION,    "mgs_exception" },
 105         { MGS_TARGET_REG,   "mgs_target_reg" },
 106         { MGS_TARGET_DEL,   "mgs_target_del" },
 107         { MGS_SET_INFO,     "mgs_set_info" },
 108         { OBD_PING,         "obd_ping" },
 109         { OBD_LOG_CANCEL,   "llog_origin_handle_cancel" },
 110         { OBD_QC_CALLBACK,  "obd_quota_callback" },
 111         { LLOG_ORIGIN_HANDLE_CREATE,     "llog_origin_handle_create" },
 112         { LLOG_ORIGIN_HANDLE_NEXT_BLOCK, "llog_origin_handle_next_block"},
 113         { LLOG_ORIGIN_HANDLE_READ_HEADER,"llog_origin_handle_read_header" },
 114         { LLOG_ORIGIN_HANDLE_WRITE_REC,  "llog_origin_handle_write_rec" },
 115         { LLOG_ORIGIN_HANDLE_CLOSE,      "llog_origin_handle_close" },
 116         { LLOG_ORIGIN_CONNECT,           "llog_origin_connect" },
 117         { LLOG_CATINFO,                  "llog_catinfo" },
 118         { LLOG_ORIGIN_HANDLE_PREV_BLOCK, "llog_origin_handle_prev_block" },
 119         { LLOG_ORIGIN_HANDLE_DESTROY,    "llog_origin_handle_destroy" },
 120         { QUOTA_DQACQ,      "quota_acquire" },
 121         { QUOTA_DQREL,      "quota_release" },
 122         { SEQ_QUERY,        "seq_query" },
 123 };
 124
 125 struct ll_eopcode {
 126      __u32       opcode;
 127      const char *opname;
 128 } ll_eopcode_table[EXTRA_LAST_OPC] = {
 129         { LDLM_GLIMPSE_ENQUEUE, "ldlm_glimpse_enqueue" },
 130         { LDLM_PLAIN_ENQUEUE,   "ldlm_plain_enqueue" },
 131         { LDLM_EXTENT_ENQUEUE,  "ldlm_extent_enqueue" },
 132         { LDLM_FLOCK_ENQUEUE,   "ldlm_flock_enqueue" },
 133         { LDLM_IBITS_ENQUEUE,   "ldlm_ibits_enqueue" },
 134         { MDS_REINT_SETATTR,    "mds_reint_setattr" },
 135         { MDS_REINT_CREATE,     "mds_reint_create" },
 136         { MDS_REINT_LINK,       "mds_reint_link" },
 137         { MDS_REINT_UNLINK,     "mds_reint_unlink" },
 138         { MDS_REINT_RENAME,     "mds_reint_rename" },
 139         { MDS_REINT_OPEN,       "mds_reint_open" },
 140         { BRW_READ_BYTES,       "read_bytes" },
 141         { BRW_WRITE_BYTES,      "write_bytes" },
 142 };
 143
 144 const char *ll_opcode2str(__u32 opcode)
 145 {
 146         /* When one of the assertions below fail, chances are that:
 147          *     1) A new opcode was added in include/lustre/lustre_idl.h,
 148          *        but is missing from the table above.
 149          * or  2) The opcode space was renumbered or rearranged,
 150          *        and the opcode_offset() function in
 151          *        ptlrpc_internal.h needs to be modified.
 152          */
 153         __u32 offset = opcode_offset(opcode);
 154         LASSERTF(offset < LUSTRE_MAX_OPCODES,
 155                  "offset %u >= LUSTRE_MAX_OPCODES %u\n",
 156                  offset, LUSTRE_MAX_OPCODES);
 157         LASSERTF(ll_rpc_opcode_table[offset].opcode == opcode,
 158                  "ll_rpc_opcode_table[%u].opcode %u != opcode %u\n",
 159                  offset, ll_rpc_opcode_table[offset].opcode, opcode);
 160         return ll_rpc_opcode_table[offset].opname;
 161 }
 162
 163 const char* ll_eopcode2str(__u32 opcode)
 164 {
 165         LASSERT(ll_eopcode_table[opcode].opcode == opcode);
 166         return ll_eopcode_table[opcode].opname;
 167 }
 168
 169 #ifdef LPROCFS
 170 void ptlrpc_lprocfs_register(struct proc_dir_entry *root, char *dir,
 171                              char *name, struct proc_dir_entry **procroot_ret,
 172                              struct lprocfs_stats **stats_ret)
 173 {
 174         struct proc_dir_entry *svc_procroot;
 175         struct lprocfs_stats *svc_stats;
 176         int i, rc;
 177         unsigned int svc_counter_config = LPROCFS_CNTR_AVGMINMAX |
 178                                           LPROCFS_CNTR_STDDEV;
 179
 180         LASSERT(*procroot_ret == NULL);
 181         LASSERT(*stats_ret == NULL);
 182
 183         svc_stats = lprocfs_alloc_stats(EXTRA_MAX_OPCODES+LUSTRE_MAX_OPCODES,0);
 184         if (svc_stats == NULL)
 185                 return;
 186
 187         if (dir) {
 188                 svc_procroot = lprocfs_register(dir, root, NULL, NULL);
 189                 if (IS_ERR(svc_procroot)) {
 190                         lprocfs_free_stats(&svc_stats);
 191                         return;
 192                 }
 193         } else {
 194                 svc_procroot = root;
 195         }
 196
 197         lprocfs_counter_init(svc_stats, PTLRPC_REQWAIT_CNTR,
 198                              svc_counter_config, "req_waittime", "usec");
 199         lprocfs_counter_init(svc_stats, PTLRPC_REQQDEPTH_CNTR,
 200                              svc_counter_config, "req_qdepth", "reqs");
 201         lprocfs_counter_init(svc_stats, PTLRPC_REQACTIVE_CNTR,
 202                              svc_counter_config, "req_active", "reqs");
 203         lprocfs_counter_init(svc_stats, PTLRPC_TIMEOUT,
 204                              svc_counter_config, "req_timeout", "sec");
 205         lprocfs_counter_init(svc_stats, PTLRPC_REQBUF_AVAIL_CNTR,
 206                              svc_counter_config, "reqbuf_avail", "bufs");
 207         for (i = 0; i < EXTRA_LAST_OPC; i++) {
 208                 char *units;
 209
 210                 switch(i) {
 211                 case BRW_WRITE_BYTES:
 212                 case BRW_READ_BYTES:
 213                         units = "bytes";
 214                         break;
 215                 default:
 216                         units = "reqs";
 217                         break;
 218                 }
 219                 lprocfs_counter_init(svc_stats, PTLRPC_LAST_CNTR + i,
 220                                      svc_counter_config,
 221                                      ll_eopcode2str(i), units);
 222         }
 223         for (i = 0; i < LUSTRE_MAX_OPCODES; i++) {
 224                 __u32 opcode = ll_rpc_opcode_table[i].opcode;
 225                 lprocfs_counter_init(svc_stats,
 226                                      EXTRA_MAX_OPCODES + i, svc_counter_config,
 227                                      ll_opcode2str(opcode), "usec");
 228         }
 229
 230         rc = lprocfs_register_stats(svc_procroot, name, svc_stats);
 231         if (rc < 0) {
 232                 if (dir)
 233                         lprocfs_remove(&svc_procroot);
 234                 lprocfs_free_stats(&svc_stats);
 235         } else {
 236                 if (dir)
 237                         *procroot_ret = svc_procroot;
 238                 *stats_ret = svc_stats;
 239         }
 240 }
 241
 242 static int
 243 ptlrpc_lprocfs_read_req_history_len(char *page, char **start, off_t off,
 244                                     int count, int *eof, void *data)
 245 {
 246         struct ptlrpc_service *svc = data;
 247
 248         *eof = 1;
 249         return snprintf(page, count, "%d\n", svc->srv_n_history_rqbds);
 250 }
 251
 252 static int
 253 ptlrpc_lprocfs_read_req_history_max(char *page, char **start, off_t off,
 254                                     int count, int *eof, void *data)
 255 {
 256         struct ptlrpc_service *svc = data;
 257
 258         *eof = 1;
 259         return snprintf(page, count, "%d\n", svc->srv_max_history_rqbds);
 260 }
 261
 262 static int
 263 ptlrpc_lprocfs_write_req_history_max(struct file *file, const char *buffer,
 264                                      unsigned long count, void *data)
 265 {
 266         struct ptlrpc_service *svc = data;
 267         int                    bufpages;
 268         int                    val;
 269         int                    rc = lprocfs_write_helper(buffer, count, &val);
 270
 271         if (rc < 0)
 272                 return rc;
 273
 274         if (val < 0)
 275                 return -ERANGE;
 276
 277         /* This sanity check is more of an insanity check; we can still
 278          * hose a kernel by allowing the request history to grow too
 279          * far. */
 280         bufpages = (svc->srv_buf_size + CFS_PAGE_SIZE - 1) >> CFS_PAGE_SHIFT;
 281         if (val > num_physpages/(2*bufpages))
 282                 return -ERANGE;
 283
 284         spin_lock(&svc->srv_lock);
 285         svc->srv_max_history_rqbds = val;
 286         spin_unlock(&svc->srv_lock);
 287
 288         return count;
 289 }
 290
 291 static int
 292 ptlrpc_lprocfs_rd_threads_min(char *page, char **start, off_t off,
 293                               int count, int *eof, void *data)
 294 {
 295         struct ptlrpc_service *svc = data;
 296
 297         return snprintf(page, count, "%d\n", svc->srv_threads_min);
 298 }
 299
 300 static int
 301 ptlrpc_lprocfs_wr_threads_min(struct file *file, const char *buffer,
 302                               unsigned long count, void *data)
 303 {
 304         struct ptlrpc_service *svc = data;
 305         int                    val;
 306         int                    rc = lprocfs_write_helper(buffer, count, &val);
 307
 308         if (rc < 0)
 309                 return rc;
 310
 311         if (val < 2)
 312                 return -ERANGE;
 313
 314         if (val > svc->srv_threads_max)
 315                 return -ERANGE;
 316
 317         spin_lock(&svc->srv_lock);
 318         svc->srv_threads_min = val;
 319         spin_unlock(&svc->srv_lock);
 320
 321         return count;
 322 }
 323
 324 static int
 325 ptlrpc_lprocfs_rd_threads_started(char *page, char **start, off_t off,
 326                                   int count, int *eof, void *data)
 327 {
 328         struct ptlrpc_service *svc = data;
 329
 330         return snprintf(page, count, "%d\n", svc->srv_threads_started);
 331 }
 332
 333 static int
 334 ptlrpc_lprocfs_rd_threads_max(char *page, char **start, off_t off,
 335                               int count, int *eof, void *data)
 336 {
 337         struct ptlrpc_service *svc = data;
 338
 339         return snprintf(page, count, "%d\n", svc->srv_threads_max);
 340 }
 341
 342 static int
 343 ptlrpc_lprocfs_wr_threads_max(struct file *file, const char *buffer,
 344                               unsigned long count, void *data)
 345 {
 346         struct ptlrpc_service *svc = data;
 347         int                    val;
 348         int                    rc = lprocfs_write_helper(buffer, count, &val);
 349
 350         if (rc < 0)
 351                 return rc;
 352
 353         if (val < 2)
 354                 return -ERANGE;
 355
 356         if (val < svc->srv_threads_min)
 357                 return -ERANGE;
 358
 359         spin_lock(&svc->srv_lock);
 360         svc->srv_threads_max = val;
 361         spin_unlock(&svc->srv_lock);
 362
 363         return count;
 364 }
 365
 366 struct ptlrpc_srh_iterator {
 367         __u64                  srhi_seq;
 368         struct ptlrpc_request *srhi_req;
 369 };
 370
 371 int
 372 ptlrpc_lprocfs_svc_req_history_seek(struct ptlrpc_service *svc,
 373                                     struct ptlrpc_srh_iterator *srhi,
 374                                     __u64 seq)
 375 {
 376         struct list_head      *e;
 377         struct ptlrpc_request *req;
 378
 379         if (srhi->srhi_req != NULL &&
 380             srhi->srhi_seq > svc->srv_request_max_cull_seq &&
 381             srhi->srhi_seq <= seq) {
 382                 /* If srhi_req was set previously, hasn't been culled and
 383                  * we're searching for a seq on or after it (i.e. more
 384                  * recent), search from it onwards.
 385                  * Since the service history is LRU (i.e. culled reqs will
 386                  * be near the head), we shouldn't have to do long
 387                  * re-scans */
 388                 LASSERT (srhi->srhi_seq == srhi->srhi_req->rq_history_seq);
 389                 LASSERT (!list_empty(&svc->srv_request_history));
 390                 e = &srhi->srhi_req->rq_history_list;
 391         } else {
 392                 /* search from start */
 393                 e = svc->srv_request_history.next;
 394         }
 395
 396         while (e != &svc->srv_request_history) {
 397                 req = list_entry(e, struct ptlrpc_request, rq_history_list);
 398
 399                 if (req->rq_history_seq >= seq) {
 400                         srhi->srhi_seq = req->rq_history_seq;
 401                         srhi->srhi_req = req;
 402                         return 0;
 403                 }
 404                 e = e->next;
 405         }
 406
 407         return -ENOENT;
 408 }
 409
 410 static void *
 411 ptlrpc_lprocfs_svc_req_history_start(struct seq_file *s, loff_t *pos)
 412 {
 413         struct ptlrpc_service       *svc = s->private;
 414         struct ptlrpc_srh_iterator  *srhi;
 415         int                          rc;
 416
 417         OBD_ALLOC(srhi, sizeof(*srhi));
 418         if (srhi == NULL)
 419                 return NULL;
 420
 421         srhi->srhi_seq = 0;
 422         srhi->srhi_req = NULL;
 423
 424         spin_lock(&svc->srv_lock);
 425         rc = ptlrpc_lprocfs_svc_req_history_seek(svc, srhi, *pos);
 426         spin_unlock(&svc->srv_lock);
 427
 428         if (rc == 0) {
 429                 *pos = srhi->srhi_seq;
 430                 return srhi;
 431         }
 432
 433         OBD_FREE(srhi, sizeof(*srhi));
 434         return NULL;
 435 }
 436
 437 static void
 438 ptlrpc_lprocfs_svc_req_history_stop(struct seq_file *s, void *iter)
 439 {
 440         struct ptlrpc_srh_iterator *srhi = iter;
 441
 442         if (srhi != NULL)
 443                 OBD_FREE(srhi, sizeof(*srhi));
 444 }
 445
 446 static void *
 447 ptlrpc_lprocfs_svc_req_history_next(struct seq_file *s,
 448                                     void *iter, loff_t *pos)
 449 {
 450         struct ptlrpc_service       *svc = s->private;
 451         struct ptlrpc_srh_iterator  *srhi = iter;
 452         int                          rc;
 453
 454         spin_lock(&svc->srv_lock);
 455         rc = ptlrpc_lprocfs_svc_req_history_seek(svc, srhi, *pos + 1);
 456         spin_unlock(&svc->srv_lock);
 457
 458         if (rc != 0) {
 459                 OBD_FREE(srhi, sizeof(*srhi));
 460                 return NULL;
 461         }
 462
 463         *pos = srhi->srhi_seq;
 464         return srhi;
 465 }
 466
 467 /* common ost/mdt srv_request_history_print_fn */
 468 void target_print_req(void *seq_file, struct ptlrpc_request *req)
 469 {
 470         /* Called holding srv_lock with irqs disabled.
 471          * Print specific req contents and a newline.
 472          * CAVEAT EMPTOR: check request message length before printing!!!
 473          * You might have received any old crap so you must be just as
 474          * careful here as the service's request parser!!! */
 475         struct seq_file *sf = seq_file;
 476
 477         switch (req->rq_phase) {
 478         case RQ_PHASE_NEW:
 479                 /* still awaiting a service thread's attention, or rejected
 480                  * because the generic request message didn't unpack */
 481                 seq_printf(sf, "<not swabbed>\n");
 482                 break;
 483         case RQ_PHASE_INTERPRET:
 484                 /* being handled, so basic msg swabbed, and opc is valid
 485                  * but racing with mds_handle() */
 486         case RQ_PHASE_COMPLETE:
 487                 /* been handled by mds_handle() reply state possibly still
 488                  * volatile */
 489                 seq_printf(sf, "opc %d\n", lustre_msg_get_opc(req->rq_reqmsg));
 490                 break;
 491         default:
 492                 DEBUG_REQ(D_ERROR, req, "bad phase %d", req->rq_phase);
 493         }
 494 }
 495 EXPORT_SYMBOL(target_print_req);
 496
 497 static int ptlrpc_lprocfs_svc_req_history_show(struct seq_file *s, void *iter)
 498 {
 499         struct ptlrpc_service      *svc = s->private;
 500         struct ptlrpc_srh_iterator *srhi = iter;
 501         struct ptlrpc_request      *req;
 502         int                         rc;
 503
 504         spin_lock(&svc->srv_lock);
 505
 506         rc = ptlrpc_lprocfs_svc_req_history_seek(svc, srhi, srhi->srhi_seq);
 507
 508         if (rc == 0) {
 509                 req = srhi->srhi_req;
 510
 511                 /* Print common req fields.
 512                  * CAVEAT EMPTOR: we're racing with the service handler
 513                  * here.  The request could contain any old crap, so you
 514                  * must be just as careful as the service's request
 515                  * parser. Currently I only print stuff here I know is OK
 516                  * to look at coz it was set up in request_in_callback()!!! */
 517                 seq_printf(s, LPD64":%s:%s:x"LPU64":%d:%s:%ld:%lds(%+lds) ",
 518                            req->rq_history_seq, libcfs_nid2str(req->rq_self),
 519                            libcfs_id2str(req->rq_peer), req->rq_xid,
 520                            req->rq_reqlen, ptlrpc_rqphase2str(req),
 521                            req->rq_arrival_time.tv_sec,
 522                            req->rq_sent - req->rq_arrival_time.tv_sec,
 523                            req->rq_sent - req->rq_deadline);
 524                 if (svc->srv_request_history_print_fn == NULL)
 525                         seq_printf(s, "\n");
 526                 else
 527                         svc->srv_request_history_print_fn(s, srhi->srhi_req);
 528         }
 529
 530         spin_unlock(&svc->srv_lock);
 531
 532         return rc;
 533 }
 534
 535 static int
 536 ptlrpc_lprocfs_svc_req_history_open(struct inode *inode, struct file *file)
 537 {
 538         static struct seq_operations sops = {
 539                 .start = ptlrpc_lprocfs_svc_req_history_start,
 540                 .stop  = ptlrpc_lprocfs_svc_req_history_stop,
 541                 .next  = ptlrpc_lprocfs_svc_req_history_next,
 542                 .show  = ptlrpc_lprocfs_svc_req_history_show,
 543         };
 544         struct proc_dir_entry *dp = PDE(inode);
 545         struct seq_file       *seqf;
 546         int                    rc;
 547
 548         LPROCFS_ENTRY_AND_CHECK(dp);
 549         rc = seq_open(file, &sops);
 550         if (rc) {
 551                 LPROCFS_EXIT();
 552                 return rc;
 553         }
 554
 555         seqf = file->private_data;
 556         seqf->private = dp->data;
 557         return 0;
 558 }
 559
 560 /* See also lprocfs_rd_timeouts */
 561 static int ptlrpc_lprocfs_rd_timeouts(char *page, char **start, off_t off,
 562                                       int count, int *eof, void *data)
 563 {
 564         struct ptlrpc_service *svc = data;
 565         unsigned int cur, worst;
 566         time_t worstt;
 567         struct dhms ts;
 568         int rc = 0;
 569
 570         *eof = 1;
 571         cur = at_get(&svc->srv_at_estimate);
 572         worst = svc->srv_at_estimate.at_worst_ever;
 573         worstt = svc->srv_at_estimate.at_worst_time;
 574         s2dhms(&ts, cfs_time_current_sec() - worstt);
 575         if (AT_OFF)
 576                 rc += snprintf(page + rc, count - rc,
 577                               "adaptive timeouts off, using obd_timeout %u\n",
 578                               obd_timeout);
 579         rc += snprintf(page + rc, count - rc,
 580                        "%10s : cur %3u  worst %3u (at %ld, "DHMS_FMT" ago) ",
 581                        "service", cur, worst, worstt,
 582                        DHMS_VARS(&ts));
 583         rc = lprocfs_at_hist_helper(page, count, rc,
 584                                     &svc->srv_at_estimate);
 585         return rc;
 586 }
 587
 588 static int ptlrpc_lprocfs_rd_hp_ratio(char *page, char **start, off_t off,
 589                                       int count, int *eof, void *data)
 590 {
 591         struct ptlrpc_service *svc = data;
 592         int rc = snprintf(page, count, "%d", svc->srv_hpreq_ratio);
 593         return rc;
 594 }
 595
 596 static int ptlrpc_lprocfs_wr_hp_ratio(struct file *file, const char *buffer,
 597                                       unsigned long count, void *data)
 598 {
 599         struct ptlrpc_service *svc = data;
 600         int rc, val;
 601
 602         rc = lprocfs_write_helper(buffer, count, &val);
 603         if (rc < 0)
 604                 return rc;
 605         if (val < 0)
 606                 return -ERANGE;
 607
 608         spin_lock(&svc->srv_lock);
 609         svc->srv_hpreq_ratio = val;
 610         spin_unlock(&svc->srv_lock);
 611         return count;
 612 }
 613
 614 void ptlrpc_lprocfs_register_service(struct proc_dir_entry *entry,
 615                                      struct ptlrpc_service *svc)
 616 {
 617         struct lprocfs_vars lproc_vars[] = {
 618                 {.name       = "high_priority_ratio",
 619                  .read_fptr  = ptlrpc_lprocfs_rd_hp_ratio,
 620                  .write_fptr = ptlrpc_lprocfs_wr_hp_ratio,
 621                  .data       = svc},
 622                 {.name       = "req_buffer_history_len",
 623                  .read_fptr  = ptlrpc_lprocfs_read_req_history_len,
 624                  .data       = svc},
 625                 {.name       = "req_buffer_history_max",
 626                  .write_fptr = ptlrpc_lprocfs_write_req_history_max,
 627                  .read_fptr  = ptlrpc_lprocfs_read_req_history_max,
 628                  .data       = svc},
 629                 {.name       = "threads_min",
 630                  .read_fptr  = ptlrpc_lprocfs_rd_threads_min,
 631                  .write_fptr = ptlrpc_lprocfs_wr_threads_min,
 632                  .data       = svc},
 633                 {.name       = "threads_max",
 634                  .read_fptr  = ptlrpc_lprocfs_rd_threads_max,
 635                  .write_fptr = ptlrpc_lprocfs_wr_threads_max,
 636                  .data       = svc},
 637                 {.name       = "threads_started",
 638                  .read_fptr  = ptlrpc_lprocfs_rd_threads_started,
 639                  .data       = svc},
 640                 {.name       = "timeouts",
 641                  .read_fptr  = ptlrpc_lprocfs_rd_timeouts,
 642                  .data       = svc},
 643                 {NULL}
 644         };
 645         static struct file_operations req_history_fops = {
 646                 .owner       = THIS_MODULE,
 647                 .open        = ptlrpc_lprocfs_svc_req_history_open,
 648                 .read        = seq_read,
 649                 .llseek      = seq_lseek,
 650                 .release     = lprocfs_seq_release,
 651         };
 652         struct proc_dir_entry *req_history;
 653
 654         ptlrpc_lprocfs_register(entry, svc->srv_name,
 655                                 "stats", &svc->srv_procroot,
 656                                 &svc->srv_stats);
 657
 658         if (svc->srv_procroot == NULL)
 659                 return;
 660
 661         lprocfs_add_vars(svc->srv_procroot, lproc_vars, NULL);
 662
 663         req_history = create_proc_entry("req_history", 0400,
 664                                         svc->srv_procroot);
 665         if (req_history != NULL) {
 666                 req_history->data = svc;
 667                 req_history->proc_fops = &req_history_fops;
 668         }
 669 }
 670
 671 void ptlrpc_lprocfs_register_obd(struct obd_device *obddev)
 672 {
 673         ptlrpc_lprocfs_register(obddev->obd_proc_entry, NULL, "stats",
 674                                 &obddev->obd_svc_procroot,
 675                                 &obddev->obd_svc_stats);
 676 }
 677 EXPORT_SYMBOL(ptlrpc_lprocfs_register_obd);
 678
 679 void ptlrpc_lprocfs_rpc_sent(struct ptlrpc_request *req, long amount)
 680 {
 681         struct lprocfs_stats *svc_stats;
 682         __u32 op = lustre_msg_get_opc(req->rq_reqmsg);
 683         int opc = opcode_offset(op);
 684
 685         svc_stats = req->rq_import->imp_obd->obd_svc_stats;
 686         if (svc_stats == NULL || opc <= 0)
 687                 return;
 688         LASSERT(opc < LUSTRE_MAX_OPCODES);
 689         if (!(op == LDLM_ENQUEUE || op == MDS_REINT))
 690                 lprocfs_counter_add(svc_stats, opc + EXTRA_MAX_OPCODES, amount);
 691 }
 692
 693 void ptlrpc_lprocfs_brw(struct ptlrpc_request *req, int bytes)
 694 {
 695         struct lprocfs_stats *svc_stats;
 696         int idx;
 697
 698         if (!req->rq_import)
 699                 return;
 700         svc_stats = req->rq_import->imp_obd->obd_svc_stats;
 701         if (!svc_stats)
 702                 return;
 703         idx = lustre_msg_get_opc(req->rq_reqmsg);
 704         switch (idx) {
 705         case OST_READ:
 706                 idx = BRW_READ_BYTES + PTLRPC_LAST_CNTR;
 707                 break;
 708         case OST_WRITE:
 709                 idx = BRW_WRITE_BYTES + PTLRPC_LAST_CNTR;
 710                 break;
 711         default:
 712                 LASSERTF(0, "unsupported opcode %u\n", idx);
 713                 break;
 714         }
 715
 716         lprocfs_counter_add(svc_stats, idx, bytes);
 717 }
 718
 719 EXPORT_SYMBOL(ptlrpc_lprocfs_brw);
 720
 721 void ptlrpc_lprocfs_unregister_service(struct ptlrpc_service *svc)
 722 {
 723         if (svc->srv_procroot != NULL)
 724                 lprocfs_remove(&svc->srv_procroot);
 725         if (svc->srv_stats)
 726                 lprocfs_free_stats(&svc->srv_stats);
 727 }
 728
 729 void ptlrpc_lprocfs_unregister_obd(struct obd_device *obd)
 730 {
 731         if (obd->obd_svc_procroot)
 732                 lprocfs_remove(&obd->obd_svc_procroot);
 733         if (obd->obd_svc_stats)
 734                 lprocfs_free_stats(&obd->obd_svc_stats);
 735 }
 736 EXPORT_SYMBOL(ptlrpc_lprocfs_unregister_obd);
 737
 738
 739 int lprocfs_wr_evict_client(struct file *file, const char *buffer,
 740                             unsigned long count, void *data)
 741 {
 742         struct obd_device *obd = data;
 743         char tmpbuf[sizeof(struct obd_uuid)];
 744
 745         /* Kludge code(deadlock situation): the lprocfs lock has been held
 746          * since the client is evicted by writting client's
 747          * uuid/nid to procfs "evict_client" entry. However,
 748          * obd_export_evict_by_uuid() will call lprocfs_remove() to destroy
 749          * the proc entries under the being destroyed export{}, so I have
 750          * to drop the lock at first here.
 751          * - jay, jxiong@clusterfs.com */
 752         class_incref(obd);
 753         LPROCFS_EXIT();
 754
 755         sscanf(buffer, "%40s", tmpbuf);
 756         if (strncmp(tmpbuf, "nid:", 4) == 0)
 757                 obd_export_evict_by_nid(obd, tmpbuf + 4);
 758         else if (strncmp(tmpbuf, "uuid:", 5) == 0)
 759                 obd_export_evict_by_uuid(obd, tmpbuf + 5);
 760         else
 761                 obd_export_evict_by_uuid(obd, tmpbuf);
 762
 763         LPROCFS_ENTRY();
 764         class_decref(obd);
 765
 766         return count;
 767 }
 768 EXPORT_SYMBOL(lprocfs_wr_evict_client);
 769
 770 int lprocfs_wr_ping(struct file *file, const char *buffer,
 771                     unsigned long count, void *data)
 772 {
 773         struct obd_device *obd = data;
 774         struct ptlrpc_request *req;
 775         int rc;
 776         ENTRY;
 777
 778         LPROCFS_CLIMP_CHECK(obd);
 779         req = ptlrpc_prep_ping(obd->u.cli.cl_import);
 780         LPROCFS_CLIMP_EXIT(obd);
 781         if (req == NULL)
 782                 RETURN(-ENOMEM);
 783
 784         req->rq_send_state = LUSTRE_IMP_FULL;
 785
 786         rc = ptlrpc_queue_wait(req);
 787
 788         ptlrpc_req_finished(req);
 789         if (rc >= 0)
 790                 RETURN(count);
 791         RETURN(rc);
 792 }
 793 EXPORT_SYMBOL(lprocfs_wr_ping);
 794
 795 #endif /* LPROCFS */