lustre/ptlrpc/lproc_ptlrpc.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Intel Corporation.
  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         { MDS_GET_INFO,     "mds_get_info" },
  97         { MDS_HSM_STATE_GET, "mds_hsm_state_get" },
  98         { MDS_HSM_STATE_SET, "mds_hsm_state_set" },
  99         { MDS_HSM_ACTION,   "mds_hsm_action" },
 100         { MDS_HSM_PROGRESS, "mds_hsm_progress" },
 101         { MDS_HSM_REQUEST,  "mds_hsm_request" },
 102         { MDS_HSM_CT_REGISTER, "mds_hsm_ct_register" },
 103         { MDS_HSM_CT_UNREGISTER, "mds_hsm_ct_unregister" },
 104         { LDLM_ENQUEUE,     "ldlm_enqueue" },
 105         { LDLM_CONVERT,     "ldlm_convert" },
 106         { LDLM_CANCEL,      "ldlm_cancel" },
 107         { LDLM_BL_CALLBACK, "ldlm_bl_callback" },
 108         { LDLM_CP_CALLBACK, "ldlm_cp_callback" },
 109         { LDLM_GL_CALLBACK, "ldlm_gl_callback" },
 110         { LDLM_SET_INFO,    "ldlm_set_info" },
 111         { MGS_CONNECT,      "mgs_connect" },
 112         { MGS_DISCONNECT,   "mgs_disconnect" },
 113         { MGS_EXCEPTION,    "mgs_exception" },
 114         { MGS_TARGET_REG,   "mgs_target_reg" },
 115         { MGS_TARGET_DEL,   "mgs_target_del" },
 116         { MGS_SET_INFO,     "mgs_set_info" },
 117         { MGS_CONFIG_READ,  "mgs_config_read" },
 118         { OBD_PING,         "obd_ping" },
 119         { OBD_LOG_CANCEL,   "llog_origin_handle_cancel" },
 120         { OBD_QC_CALLBACK,  "obd_quota_callback" },
 121         { OBD_IDX_READ,     "dt_index_read" },
 122         { LLOG_ORIGIN_HANDLE_CREATE,     "llog_origin_handle_create" },
 123         { LLOG_ORIGIN_HANDLE_NEXT_BLOCK, "llog_origin_handle_next_block" },
 124         { LLOG_ORIGIN_HANDLE_READ_HEADER,"llog_origin_handle_read_header" },
 125         { LLOG_ORIGIN_HANDLE_WRITE_REC,  "llog_origin_handle_write_rec" },
 126         { LLOG_ORIGIN_HANDLE_CLOSE,      "llog_origin_handle_close" },
 127         { LLOG_ORIGIN_CONNECT,           "llog_origin_connect" },
 128         { LLOG_CATINFO,                  "llog_catinfo" },
 129         { LLOG_ORIGIN_HANDLE_PREV_BLOCK, "llog_origin_handle_prev_block" },
 130         { LLOG_ORIGIN_HANDLE_DESTROY,    "llog_origin_handle_destroy" },
 131         { QUOTA_DQACQ,      "quota_acquire" },
 132         { QUOTA_DQREL,      "quota_release" },
 133         { SEQ_QUERY,        "seq_query" },
 134         { SEC_CTX_INIT,     "sec_ctx_init" },
 135         { SEC_CTX_INIT_CONT,"sec_ctx_init_cont" },
 136         { SEC_CTX_FINI,     "sec_ctx_fini" },
 137         { FLD_QUERY,        "fld_query" }
 138 };
 139
 140 struct ll_eopcode {
 141      __u32       opcode;
 142      const char *opname;
 143 } ll_eopcode_table[EXTRA_LAST_OPC] = {
 144         { LDLM_GLIMPSE_ENQUEUE, "ldlm_glimpse_enqueue" },
 145         { LDLM_PLAIN_ENQUEUE,   "ldlm_plain_enqueue" },
 146         { LDLM_EXTENT_ENQUEUE,  "ldlm_extent_enqueue" },
 147         { LDLM_FLOCK_ENQUEUE,   "ldlm_flock_enqueue" },
 148         { LDLM_IBITS_ENQUEUE,   "ldlm_ibits_enqueue" },
 149         { MDS_REINT_SETATTR,    "mds_reint_setattr" },
 150         { MDS_REINT_CREATE,     "mds_reint_create" },
 151         { MDS_REINT_LINK,       "mds_reint_link" },
 152         { MDS_REINT_UNLINK,     "mds_reint_unlink" },
 153         { MDS_REINT_RENAME,     "mds_reint_rename" },
 154         { MDS_REINT_OPEN,       "mds_reint_open" },
 155         { MDS_REINT_SETXATTR,   "mds_reint_setxattr" },
 156         { BRW_READ_BYTES,       "read_bytes" },
 157         { BRW_WRITE_BYTES,      "write_bytes" },
 158 };
 159
 160 const char *ll_opcode2str(__u32 opcode)
 161 {
 162         /* When one of the assertions below fail, chances are that:
 163          *     1) A new opcode was added in include/lustre/lustre_idl.h,
 164          *        but is missing from the table above.
 165          * or  2) The opcode space was renumbered or rearranged,
 166          *        and the opcode_offset() function in
 167          *        ptlrpc_internal.h needs to be modified.
 168          */
 169         __u32 offset = opcode_offset(opcode);
 170         LASSERTF(offset < LUSTRE_MAX_OPCODES,
 171                  "offset %u >= LUSTRE_MAX_OPCODES %u\n",
 172                  offset, LUSTRE_MAX_OPCODES);
 173         LASSERTF(ll_rpc_opcode_table[offset].opcode == opcode,
 174                  "ll_rpc_opcode_table[%u].opcode %u != opcode %u\n",
 175                  offset, ll_rpc_opcode_table[offset].opcode, opcode);
 176         return ll_rpc_opcode_table[offset].opname;
 177 }
 178
 179 const char* ll_eopcode2str(__u32 opcode)
 180 {
 181         LASSERT(ll_eopcode_table[opcode].opcode == opcode);
 182         return ll_eopcode_table[opcode].opname;
 183 }
 184 #ifdef LPROCFS
 185 void ptlrpc_lprocfs_register(struct proc_dir_entry *root, char *dir,
 186                              char *name, struct proc_dir_entry **procroot_ret,
 187                              struct lprocfs_stats **stats_ret)
 188 {
 189         struct proc_dir_entry *svc_procroot;
 190         struct lprocfs_stats *svc_stats;
 191         int i, rc;
 192         unsigned int svc_counter_config = LPROCFS_CNTR_AVGMINMAX |
 193                                           LPROCFS_CNTR_STDDEV;
 194
 195         LASSERT(*procroot_ret == NULL);
 196         LASSERT(*stats_ret == NULL);
 197
 198         svc_stats = lprocfs_alloc_stats(EXTRA_MAX_OPCODES+LUSTRE_MAX_OPCODES,0);
 199         if (svc_stats == NULL)
 200                 return;
 201
 202         if (dir) {
 203                 svc_procroot = lprocfs_register(dir, root, NULL, NULL);
 204                 if (IS_ERR(svc_procroot)) {
 205                         lprocfs_free_stats(&svc_stats);
 206                         return;
 207                 }
 208         } else {
 209                 svc_procroot = root;
 210         }
 211
 212         lprocfs_counter_init(svc_stats, PTLRPC_REQWAIT_CNTR,
 213                              svc_counter_config, "req_waittime", "usec");
 214         lprocfs_counter_init(svc_stats, PTLRPC_REQQDEPTH_CNTR,
 215                              svc_counter_config, "req_qdepth", "reqs");
 216         lprocfs_counter_init(svc_stats, PTLRPC_REQACTIVE_CNTR,
 217                              svc_counter_config, "req_active", "reqs");
 218         lprocfs_counter_init(svc_stats, PTLRPC_TIMEOUT,
 219                              svc_counter_config, "req_timeout", "sec");
 220         lprocfs_counter_init(svc_stats, PTLRPC_REQBUF_AVAIL_CNTR,
 221                              svc_counter_config, "reqbuf_avail", "bufs");
 222         for (i = 0; i < EXTRA_LAST_OPC; i++) {
 223                 char *units;
 224
 225                 switch(i) {
 226                 case BRW_WRITE_BYTES:
 227                 case BRW_READ_BYTES:
 228                         units = "bytes";
 229                         break;
 230                 default:
 231                         units = "reqs";
 232                         break;
 233                 }
 234                 lprocfs_counter_init(svc_stats, PTLRPC_LAST_CNTR + i,
 235                                      svc_counter_config,
 236                                      ll_eopcode2str(i), units);
 237         }
 238         for (i = 0; i < LUSTRE_MAX_OPCODES; i++) {
 239                 __u32 opcode = ll_rpc_opcode_table[i].opcode;
 240                 lprocfs_counter_init(svc_stats,
 241                                      EXTRA_MAX_OPCODES + i, svc_counter_config,
 242                                      ll_opcode2str(opcode), "usec");
 243         }
 244
 245         rc = lprocfs_register_stats(svc_procroot, name, svc_stats);
 246         if (rc < 0) {
 247                 if (dir)
 248                         lprocfs_remove(&svc_procroot);
 249                 lprocfs_free_stats(&svc_stats);
 250         } else {
 251                 if (dir)
 252                         *procroot_ret = svc_procroot;
 253                 *stats_ret = svc_stats;
 254         }
 255 }
 256
 257 static int
 258 ptlrpc_lprocfs_read_req_history_len(char *page, char **start, off_t off,
 259                                     int count, int *eof, void *data)
 260 {
 261         struct ptlrpc_service *svc = data;
 262         struct ptlrpc_service_part *svcpt;
 263         int     total = 0;
 264         int     i;
 265
 266         *eof = 1;
 267
 268         ptlrpc_service_for_each_part(svcpt, i, svc)
 269                 total += svcpt->scp_hist_nrqbds;
 270
 271         return snprintf(page, count, "%d\n", total);
 272 }
 273
 274 static int
 275 ptlrpc_lprocfs_read_req_history_max(char *page, char **start, off_t off,
 276                                     int count, int *eof, void *data)
 277 {
 278         struct ptlrpc_service *svc = data;
 279         struct ptlrpc_service_part *svcpt;
 280         int     total = 0;
 281         int     i;
 282
 283         *eof = 1;
 284         ptlrpc_service_for_each_part(svcpt, i, svc)
 285                 total += svc->srv_hist_nrqbds_cpt_max;
 286
 287         return snprintf(page, count, "%d\n", total);
 288 }
 289
 290 static int
 291 ptlrpc_lprocfs_write_req_history_max(struct file *file, const char *buffer,
 292                                      unsigned long count, void *data)
 293 {
 294         struct ptlrpc_service      *svc = data;
 295         int                         bufpages;
 296         int                         val;
 297         int                         rc;
 298
 299         rc = lprocfs_write_helper(buffer, count, &val);
 300         if (rc < 0)
 301                 return rc;
 302
 303         if (val < 0)
 304                 return -ERANGE;
 305
 306         /* This sanity check is more of an insanity check; we can still
 307          * hose a kernel by allowing the request history to grow too
 308          * far. */
 309         bufpages = (svc->srv_buf_size + CFS_PAGE_SIZE - 1) >> CFS_PAGE_SHIFT;
 310         if (val > cfs_num_physpages/(2 * bufpages))
 311                 return -ERANGE;
 312
 313         spin_lock(&svc->srv_lock);
 314
 315         if (val == 0)
 316                 svc->srv_hist_nrqbds_cpt_max = 0;
 317         else
 318                 svc->srv_hist_nrqbds_cpt_max = max(1, (val / svc->srv_ncpts));
 319
 320         spin_unlock(&svc->srv_lock);
 321
 322         return count;
 323 }
 324
 325 static int
 326 ptlrpc_lprocfs_rd_threads_min(char *page, char **start, off_t off,
 327                               int count, int *eof, void *data)
 328 {
 329         struct ptlrpc_service *svc = data;
 330
 331         return snprintf(page, count, "%d\n",
 332                         svc->srv_nthrs_cpt_init * svc->srv_ncpts);
 333 }
 334
 335 static int
 336 ptlrpc_lprocfs_wr_threads_min(struct file *file, const char *buffer,
 337                               unsigned long count, void *data)
 338 {
 339         struct ptlrpc_service      *svc = data;
 340         int     val;
 341         int     rc = lprocfs_write_helper(buffer, count, &val);
 342
 343         if (rc < 0)
 344                 return rc;
 345
 346         if (val / svc->srv_ncpts < PTLRPC_NTHRS_INIT)
 347                 return -ERANGE;
 348
 349         spin_lock(&svc->srv_lock);
 350         if (val > svc->srv_nthrs_cpt_limit * svc->srv_ncpts) {
 351                 spin_unlock(&svc->srv_lock);
 352                 return -ERANGE;
 353         }
 354
 355         svc->srv_nthrs_cpt_init = val / svc->srv_ncpts;
 356
 357         spin_unlock(&svc->srv_lock);
 358
 359         return count;
 360 }
 361
 362 static int
 363 ptlrpc_lprocfs_rd_threads_started(char *page, char **start, off_t off,
 364                                   int count, int *eof, void *data)
 365 {
 366         struct ptlrpc_service *svc = data;
 367         struct ptlrpc_service_part *svcpt;
 368         int     total = 0;
 369         int     i;
 370
 371         LASSERT(svc->srv_parts != NULL);
 372         ptlrpc_service_for_each_part(svcpt, i, svc)
 373                 total += svcpt->scp_nthrs_running;
 374
 375         return snprintf(page, count, "%d\n", total);
 376 }
 377
 378 static int
 379 ptlrpc_lprocfs_rd_threads_max(char *page, char **start, off_t off,
 380                               int count, int *eof, void *data)
 381 {
 382         struct ptlrpc_service *svc = data;
 383
 384         return snprintf(page, count, "%d\n",
 385                         svc->srv_nthrs_cpt_limit * svc->srv_ncpts);
 386 }
 387
 388 static int
 389 ptlrpc_lprocfs_wr_threads_max(struct file *file, const char *buffer,
 390                               unsigned long count, void *data)
 391 {
 392         struct ptlrpc_service *svc = data;
 393         int     val;
 394         int     rc = lprocfs_write_helper(buffer, count, &val);
 395
 396         if (rc < 0)
 397                 return rc;
 398
 399         if (val / svc->srv_ncpts < PTLRPC_NTHRS_INIT)
 400                 return -ERANGE;
 401
 402         spin_lock(&svc->srv_lock);
 403         if (val < svc->srv_nthrs_cpt_init * svc->srv_ncpts) {
 404                 spin_unlock(&svc->srv_lock);
 405                 return -ERANGE;
 406         }
 407
 408         svc->srv_nthrs_cpt_limit = val / svc->srv_ncpts;
 409
 410         spin_unlock(&svc->srv_lock);
 411
 412         return count;
 413 }
 414
 415 /**
 416  * \addtogoup nrs
 417  * @{
 418  */
 419 extern struct nrs_core nrs_core;
 420
 421 /**
 422  * Translates \e ptlrpc_nrs_pol_state values to human-readable strings.
 423  *
 424  * \param[in] state The policy state
 425  */
 426 static const char *
 427 nrs_state2str(enum ptlrpc_nrs_pol_state state)
 428 {
 429         switch (state) {
 430         default:
 431                 LBUG();
 432         case NRS_POL_STATE_INVALID:
 433                 return "invalid";
 434         case NRS_POL_STATE_UNAVAIL:
 435                 return "unavail";
 436         case NRS_POL_STATE_STOPPED:
 437                 return "stopped";
 438         case NRS_POL_STATE_STOPPING:
 439                 return "stopping";
 440         case NRS_POL_STATE_STARTING:
 441                 return "starting";
 442         case NRS_POL_STATE_STARTED:
 443                 return "started";
 444         }
 445 }
 446
 447 /**
 448  * Obtains status information for \a policy.
 449  *
 450  * Information is copied in \a info.
 451  *
 452  * \param[in] policy The policy
 453  * \param[out] info  Holds returned status information
 454  */
 455 void
 456 nrs_policy_get_info_locked(struct ptlrpc_nrs_policy *policy,
 457                            struct ptlrpc_nrs_pol_info *info)
 458 {
 459         LASSERT(policy != NULL);
 460         LASSERT(info != NULL);
 461         LASSERT(spin_is_locked(&policy->pol_nrs->nrs_lock));
 462
 463         memcpy(info->pi_name, policy->pol_name, NRS_POL_NAME_MAX);
 464
 465         info->pi_fallback    = !!(policy->pol_flags & PTLRPC_NRS_FL_FALLBACK);
 466         info->pi_state       = policy->pol_state;
 467         /**
 468          * XXX: These are accessed without holding
 469          * ptlrpc_service_part::scp_req_lock.
 470          */
 471         info->pi_req_queued  = policy->pol_req_queued;
 472         info->pi_req_started = policy->pol_req_started;
 473 }
 474
 475 /**
 476  * Reads and prints policy status information for all policies of a PTLRPC
 477  * service.
 478  */
 479 static int
 480 ptlrpc_lprocfs_rd_nrs(char *page, char **start, off_t off,
 481                       int count, int *eof, void *data)
 482 {
 483         struct ptlrpc_service          *svc = data;
 484         struct ptlrpc_service_part     *svcpt;
 485         struct ptlrpc_nrs              *nrs;
 486         struct ptlrpc_nrs_policy       *policy;
 487         struct ptlrpc_nrs_pol_info     *infos;
 488         struct ptlrpc_nrs_pol_info      tmp;
 489         unsigned                        num_pols;
 490         unsigned                        pol_idx = 0;
 491         bool                            hp = false;
 492         int                             i;
 493         int                             rc = 0;
 494         int                             rc2 = 0;
 495         ENTRY;
 496
 497         /**
 498          * Serialize NRS core lprocfs operations with policy registration/
 499          * unregistration.
 500          */
 501         mutex_lock(&nrs_core.nrs_mutex);
 502
 503         /**
 504          * Use the first service partition's regular NRS head in order to obtain
 505          * the number of policies registered with NRS heads of this service. All
 506          * service partitions will have the same number of policies.
 507          */
 508         nrs = nrs_svcpt2nrs(svc->srv_parts[0], false);
 509
 510         spin_lock(&nrs->nrs_lock);
 511         num_pols = svc->srv_parts[0]->scp_nrs_reg.nrs_num_pols;
 512         spin_unlock(&nrs->nrs_lock);
 513
 514         OBD_ALLOC(infos, num_pols * sizeof(*infos));
 515         if (infos == NULL)
 516                 GOTO(out, rc = -ENOMEM);
 517 again:
 518
 519         ptlrpc_service_for_each_part(svcpt, i, svc) {
 520                 nrs = nrs_svcpt2nrs(svcpt, hp);
 521                 spin_lock(&nrs->nrs_lock);
 522
 523                 pol_idx = 0;
 524
 525                 cfs_list_for_each_entry(policy, &nrs->nrs_policy_list,
 526                                         pol_list) {
 527                         LASSERT(pol_idx < num_pols);
 528
 529                         nrs_policy_get_info_locked(policy, &tmp);
 530                         /**
 531                          * Copy values when handling the first service
 532                          * partition.
 533                          */
 534                         if (i == 0) {
 535                                 memcpy(infos[pol_idx].pi_name, tmp.pi_name,
 536                                        NRS_POL_NAME_MAX);
 537                                 memcpy(&infos[pol_idx].pi_state, &tmp.pi_state,
 538                                        sizeof(tmp.pi_state));
 539                                 infos[pol_idx].pi_fallback = tmp.pi_fallback;
 540                                 /**
 541                                  * For the rest of the service partitions
 542                                  * sanity-check the values we get.
 543                                  */
 544                         } else {
 545                                 LASSERT(strncmp(infos[pol_idx].pi_name,
 546                                                 tmp.pi_name,
 547                                                 NRS_POL_NAME_MAX) == 0);
 548                                 /**
 549                                  * Not asserting ptlrpc_nrs_pol_info::pi_state,
 550                                  * because it may be different between
 551                                  * instances of the same policy in different
 552                                  * service partitions.
 553                                  */
 554                                 LASSERT(infos[pol_idx].pi_fallback ==
 555                                         tmp.pi_fallback);
 556                         }
 557
 558                         infos[pol_idx].pi_req_queued += tmp.pi_req_queued;
 559                         infos[pol_idx].pi_req_started += tmp.pi_req_started;
 560
 561                         pol_idx++;
 562                 }
 563                 spin_unlock(&nrs->nrs_lock);
 564         }
 565
 566         /**
 567          * Policy status information output is in YAML format.
 568          * For example:
 569          *
 570          *      regular_requests:
 571          *        - name: fifo
 572          *          state: started
 573          *          fallback: yes
 574          *          queued: 0
 575          *          active: 0
 576          *
 577          *        - name: crrn
 578          *          state: started
 579          *          fallback: no
 580          *          queued: 2015
 581          *          active: 384
 582          *
 583          *      high_priority_requests:
 584          *        - name: fifo
 585          *          state: started
 586          *          fallback: yes
 587          *          queued: 0
 588          *          active: 2
 589          *
 590          *        - name: crrn
 591          *          state: stopped
 592          *          fallback: no
 593          *          queued: 0
 594          *          active: 0
 595          */
 596         rc2 = snprintf(page + rc, count - rc,
 597                        "%s\n", !hp ?
 598                        "\nregular_requests:" :
 599                        "high_priority_requests:");
 600
 601         if (rc2 >= count - rc) {
 602                 /** Output was truncated */
 603                 GOTO(out, rc = -EFBIG);
 604         }
 605
 606         rc += rc2;
 607
 608         for (pol_idx = 0; pol_idx < num_pols; pol_idx++) {
 609                 rc2 = snprintf(page + rc, count - rc,
 610                                "  - name: %s\n"
 611                                "    state: %s\n"
 612                                "    fallback: %s\n"
 613                                "    queued: %-20d\n"
 614                                "    active: %-20d\n\n",
 615                                infos[pol_idx].pi_name,
 616                                nrs_state2str(infos[pol_idx].pi_state),
 617                                infos[pol_idx].pi_fallback ? "yes" : "no",
 618                                (int)infos[pol_idx].pi_req_queued,
 619                                (int)infos[pol_idx].pi_req_started);
 620
 621
 622                 if (rc2 >= count - rc) {
 623                         /** Output was truncated */
 624                         GOTO(out, rc = -EFBIG);
 625                 }
 626
 627                 rc += rc2;
 628         }
 629
 630         if (!hp && nrs_svc_has_hp(svc)) {
 631                 memset(infos, 0, num_pols * sizeof(*infos));
 632
 633                 /**
 634                  * Redo the processing for the service's HP NRS heads' policies.
 635                  */
 636                 hp = true;
 637                 goto again;
 638         }
 639
 640         *eof = 1;
 641
 642 out:
 643         if (infos)
 644                 OBD_FREE(infos, num_pols * sizeof(*infos));
 645
 646         mutex_unlock(&nrs_core.nrs_mutex);
 647
 648         RETURN(rc);
 649 }
 650
 651 /**
 652  * The longest valid command string is the maxium policy name size, plus the
 653  * length of the " reg" substring
 654  */
 655 #define LPROCFS_NRS_WR_MAX_CMD  (NRS_POL_NAME_MAX + sizeof(" reg") - 1)
 656
 657 /**
 658  * Starts and stops a given policy on a PTLRPC service.
 659  *
 660  * Commands consist of the policy name, followed by an optional [reg|hp] token;
 661  * if the optional token is omitted, the operation is performed on both the
 662  * regular and high-priority (if the service has one) NRS head.
 663  */
 664 static int
 665 ptlrpc_lprocfs_wr_nrs(struct file *file, const char *buffer,
 666                       unsigned long count, void *data)
 667 {
 668         struct ptlrpc_service          *svc = data;
 669         enum ptlrpc_nrs_queue_type      queue = PTLRPC_NRS_QUEUE_BOTH;
 670         char                           *cmd;
 671         char                           *cmd_copy = NULL;
 672         char                           *token;
 673         int                             rc = 0;
 674         ENTRY;
 675
 676         if (count >= LPROCFS_NRS_WR_MAX_CMD)
 677                 GOTO(out, rc = -EINVAL);
 678
 679         OBD_ALLOC(cmd, LPROCFS_NRS_WR_MAX_CMD);
 680         if (cmd == NULL)
 681                 GOTO(out, rc = -ENOMEM);
 682         /**
 683          * strsep() modifies its argument, so keep a copy
 684          */
 685         cmd_copy = cmd;
 686
 687         if (cfs_copy_from_user(cmd, buffer, count))
 688                 GOTO(out, rc = -EFAULT);
 689
 690         cmd[count] = '\0';
 691
 692         token = strsep(&cmd, " ");
 693
 694         if (strlen(token) > NRS_POL_NAME_MAX - 1)
 695                 GOTO(out, rc = -EINVAL);
 696
 697         /**
 698          * No [reg|hp] token has been specified
 699          */
 700         if (cmd == NULL)
 701                 goto default_queue;
 702
 703         /**
 704          * The second token is either NULL, or an optional [reg|hp] string
 705          */
 706         if (strcmp(cmd, "reg") == 0)
 707                 queue = PTLRPC_NRS_QUEUE_REG;
 708         else if (strcmp(cmd, "hp") == 0)
 709                 queue = PTLRPC_NRS_QUEUE_HP;
 710         else
 711                 GOTO(out, rc = -EINVAL);
 712
 713 default_queue:
 714
 715         if (queue == PTLRPC_NRS_QUEUE_HP && !nrs_svc_has_hp(svc))
 716                 GOTO(out, rc = -ENODEV);
 717         else if (queue == PTLRPC_NRS_QUEUE_BOTH && !nrs_svc_has_hp(svc))
 718                 queue = PTLRPC_NRS_QUEUE_REG;
 719
 720         /**
 721          * Serialize NRS core lprocfs operations with policy registration/
 722          * unregistration.
 723          */
 724         mutex_lock(&nrs_core.nrs_mutex);
 725
 726         rc = ptlrpc_nrs_policy_control(svc, queue, token, PTLRPC_NRS_CTL_START,
 727                                        false, NULL);
 728
 729         mutex_unlock(&nrs_core.nrs_mutex);
 730 out:
 731         if (cmd_copy)
 732                 OBD_FREE(cmd_copy, LPROCFS_NRS_WR_MAX_CMD);
 733
 734         RETURN(rc < 0 ? rc : count);
 735 }
 736
 737 /** @} nrs */
 738
 739 struct ptlrpc_srh_iterator {
 740         int                     srhi_idx;
 741         __u64                   srhi_seq;
 742         struct ptlrpc_request   *srhi_req;
 743 };
 744
 745 int
 746 ptlrpc_lprocfs_svc_req_history_seek(struct ptlrpc_service_part *svcpt,
 747                                     struct ptlrpc_srh_iterator *srhi,
 748                                     __u64 seq)
 749 {
 750         cfs_list_t              *e;
 751         struct ptlrpc_request   *req;
 752
 753         if (srhi->srhi_req != NULL &&
 754             srhi->srhi_seq > svcpt->scp_hist_seq_culled &&
 755             srhi->srhi_seq <= seq) {
 756                 /* If srhi_req was set previously, hasn't been culled and
 757                  * we're searching for a seq on or after it (i.e. more
 758                  * recent), search from it onwards.
 759                  * Since the service history is LRU (i.e. culled reqs will
 760                  * be near the head), we shouldn't have to do long
 761                  * re-scans */
 762                 LASSERTF(srhi->srhi_seq == srhi->srhi_req->rq_history_seq,
 763                          "%s:%d: seek seq "LPU64", request seq "LPU64"\n",
 764                          svcpt->scp_service->srv_name, svcpt->scp_cpt,
 765                          srhi->srhi_seq, srhi->srhi_req->rq_history_seq);
 766                 LASSERTF(!cfs_list_empty(&svcpt->scp_hist_reqs),
 767                          "%s:%d: seek offset "LPU64", request seq "LPU64", "
 768                          "last culled "LPU64"\n",
 769                          svcpt->scp_service->srv_name, svcpt->scp_cpt,
 770                          seq, srhi->srhi_seq, svcpt->scp_hist_seq_culled);
 771                 e = &srhi->srhi_req->rq_history_list;
 772         } else {
 773                 /* search from start */
 774                 e = svcpt->scp_hist_reqs.next;
 775         }
 776
 777         while (e != &svcpt->scp_hist_reqs) {
 778                 req = cfs_list_entry(e, struct ptlrpc_request, rq_history_list);
 779
 780                 if (req->rq_history_seq >= seq) {
 781                         srhi->srhi_seq = req->rq_history_seq;
 782                         srhi->srhi_req = req;
 783                         return 0;
 784                 }
 785                 e = e->next;
 786         }
 787
 788         return -ENOENT;
 789 }
 790
 791 /*
 792  * ptlrpc history sequence is used as "position" of seq_file, in some case,
 793  * seq_read() will increase "position" to indicate reading the next
 794  * element, however, low bits of history sequence are reserved for CPT id
 795  * (check the details from comments before ptlrpc_req_add_history), which
 796  * means seq_read() might change CPT id of history sequence and never
 797  * finish reading of requests on a CPT. To make it work, we have to shift
 798  * CPT id to high bits and timestamp to low bits, so seq_read() will only
 799  * increase timestamp which can correctly indicate the next position.
 800  */
 801
 802 /* convert seq_file pos to cpt */
 803 #define PTLRPC_REQ_POS2CPT(svc, pos)                    \
 804         ((svc)->srv_cpt_bits == 0 ? 0 :                 \
 805          (__u64)(pos) >> (64 - (svc)->srv_cpt_bits))
 806
 807 /* make up seq_file pos from cpt */
 808 #define PTLRPC_REQ_CPT2POS(svc, cpt)                    \
 809         ((svc)->srv_cpt_bits == 0 ? 0 :                 \
 810          (cpt) << (64 - (svc)->srv_cpt_bits))
 811
 812 /* convert sequence to position */
 813 #define PTLRPC_REQ_SEQ2POS(svc, seq)                    \
 814         ((svc)->srv_cpt_bits == 0 ? (seq) :             \
 815          ((seq) >> (svc)->srv_cpt_bits) |               \
 816          ((seq) << (64 - (svc)->srv_cpt_bits)))
 817
 818 /* convert position to sequence */
 819 #define PTLRPC_REQ_POS2SEQ(svc, pos)                    \
 820         ((svc)->srv_cpt_bits == 0 ? (pos) :             \
 821          ((__u64)(pos) << (svc)->srv_cpt_bits) |        \
 822          ((__u64)(pos) >> (64 - (svc)->srv_cpt_bits)))
 823
 824 static void *
 825 ptlrpc_lprocfs_svc_req_history_start(struct seq_file *s, loff_t *pos)
 826 {
 827         struct ptlrpc_service           *svc = s->private;
 828         struct ptlrpc_service_part      *svcpt;
 829         struct ptlrpc_srh_iterator      *srhi;
 830         unsigned int                    cpt;
 831         int                             rc;
 832         int                             i;
 833
 834         if (sizeof(loff_t) != sizeof(__u64)) { /* can't support */
 835                 CWARN("Failed to read request history because size of loff_t "
 836                       "%d can't match size of u64\n", (int)sizeof(loff_t));
 837                 return NULL;
 838         }
 839
 840         OBD_ALLOC(srhi, sizeof(*srhi));
 841         if (srhi == NULL)
 842                 return NULL;
 843
 844         srhi->srhi_seq = 0;
 845         srhi->srhi_req = NULL;
 846
 847         cpt = PTLRPC_REQ_POS2CPT(svc, *pos);
 848
 849         ptlrpc_service_for_each_part(svcpt, i, svc) {
 850                 if (i < cpt) /* skip */
 851                         continue;
 852                 if (i > cpt) /* make up the lowest position for this CPT */
 853                         *pos = PTLRPC_REQ_CPT2POS(svc, i);
 854
 855                 spin_lock(&svcpt->scp_lock);
 856                 rc = ptlrpc_lprocfs_svc_req_history_seek(svcpt, srhi,
 857                                 PTLRPC_REQ_POS2SEQ(svc, *pos));
 858                 spin_unlock(&svcpt->scp_lock);
 859                 if (rc == 0) {
 860                         *pos = PTLRPC_REQ_SEQ2POS(svc, srhi->srhi_seq);
 861                         srhi->srhi_idx = i;
 862                         return srhi;
 863                 }
 864         }
 865
 866         OBD_FREE(srhi, sizeof(*srhi));
 867         return NULL;
 868 }
 869
 870 static void
 871 ptlrpc_lprocfs_svc_req_history_stop(struct seq_file *s, void *iter)
 872 {
 873         struct ptlrpc_srh_iterator *srhi = iter;
 874
 875         if (srhi != NULL)
 876                 OBD_FREE(srhi, sizeof(*srhi));
 877 }
 878
 879 static void *
 880 ptlrpc_lprocfs_svc_req_history_next(struct seq_file *s,
 881                                     void *iter, loff_t *pos)
 882 {
 883         struct ptlrpc_service           *svc = s->private;
 884         struct ptlrpc_srh_iterator      *srhi = iter;
 885         struct ptlrpc_service_part      *svcpt;
 886         __u64                           seq;
 887         int                             rc;
 888         int                             i;
 889
 890         for (i = srhi->srhi_idx; i < svc->srv_ncpts; i++) {
 891                 svcpt = svc->srv_parts[i];
 892
 893                 if (i > srhi->srhi_idx) { /* reset iterator for a new CPT */
 894                         srhi->srhi_req = NULL;
 895                         seq = srhi->srhi_seq = 0;
 896                 } else { /* the next sequence */
 897                         seq = srhi->srhi_seq + (1 << svc->srv_cpt_bits);
 898                 }
 899
 900                 spin_lock(&svcpt->scp_lock);
 901                 rc = ptlrpc_lprocfs_svc_req_history_seek(svcpt, srhi, seq);
 902                 spin_unlock(&svcpt->scp_lock);
 903                 if (rc == 0) {
 904                         *pos = PTLRPC_REQ_SEQ2POS(svc, srhi->srhi_seq);
 905                         srhi->srhi_idx = i;
 906                         return srhi;
 907                 }
 908         }
 909
 910         OBD_FREE(srhi, sizeof(*srhi));
 911         return NULL;
 912 }
 913
 914 /* common ost/mdt so_req_printer */
 915 void target_print_req(void *seq_file, struct ptlrpc_request *req)
 916 {
 917         /* Called holding srv_lock with irqs disabled.
 918          * Print specific req contents and a newline.
 919          * CAVEAT EMPTOR: check request message length before printing!!!
 920          * You might have received any old crap so you must be just as
 921          * careful here as the service's request parser!!! */
 922         struct seq_file *sf = seq_file;
 923
 924         switch (req->rq_phase) {
 925         case RQ_PHASE_NEW:
 926                 /* still awaiting a service thread's attention, or rejected
 927                  * because the generic request message didn't unpack */
 928                 seq_printf(sf, "<not swabbed>\n");
 929                 break;
 930         case RQ_PHASE_INTERPRET:
 931                 /* being handled, so basic msg swabbed, and opc is valid
 932                  * but racing with mds_handle() */
 933         case RQ_PHASE_COMPLETE:
 934                 /* been handled by mds_handle() reply state possibly still
 935                  * volatile */
 936                 seq_printf(sf, "opc %d\n", lustre_msg_get_opc(req->rq_reqmsg));
 937                 break;
 938         default:
 939                 DEBUG_REQ(D_ERROR, req, "bad phase %d", req->rq_phase);
 940         }
 941 }
 942 EXPORT_SYMBOL(target_print_req);
 943
 944 static int ptlrpc_lprocfs_svc_req_history_show(struct seq_file *s, void *iter)
 945 {
 946         struct ptlrpc_service           *svc = s->private;
 947         struct ptlrpc_srh_iterator      *srhi = iter;
 948         struct ptlrpc_service_part      *svcpt;
 949         struct ptlrpc_request           *req;
 950         int                             rc;
 951
 952         LASSERT(srhi->srhi_idx < svc->srv_ncpts);
 953
 954         svcpt = svc->srv_parts[srhi->srhi_idx];
 955
 956         spin_lock(&svcpt->scp_lock);
 957
 958         rc = ptlrpc_lprocfs_svc_req_history_seek(svcpt, srhi, srhi->srhi_seq);
 959
 960         if (rc == 0) {
 961                 req = srhi->srhi_req;
 962
 963                 /* Print common req fields.
 964                  * CAVEAT EMPTOR: we're racing with the service handler
 965                  * here.  The request could contain any old crap, so you
 966                  * must be just as careful as the service's request
 967                  * parser. Currently I only print stuff here I know is OK
 968                  * to look at coz it was set up in request_in_callback()!!! */
 969                 seq_printf(s, LPD64":%s:%s:x"LPU64":%d:%s:%ld:%lds(%+lds) ",
 970                            req->rq_history_seq, libcfs_nid2str(req->rq_self),
 971                            libcfs_id2str(req->rq_peer), req->rq_xid,
 972                            req->rq_reqlen, ptlrpc_rqphase2str(req),
 973                            req->rq_arrival_time.tv_sec,
 974                            req->rq_sent - req->rq_arrival_time.tv_sec,
 975                            req->rq_sent - req->rq_deadline);
 976                 if (svc->srv_ops.so_req_printer == NULL)
 977                         seq_printf(s, "\n");
 978                 else
 979                         svc->srv_ops.so_req_printer(s, srhi->srhi_req);
 980         }
 981
 982         spin_unlock(&svcpt->scp_lock);
 983         return rc;
 984 }
 985
 986 static int
 987 ptlrpc_lprocfs_svc_req_history_open(struct inode *inode, struct file *file)
 988 {
 989         static struct seq_operations sops = {
 990                 .start = ptlrpc_lprocfs_svc_req_history_start,
 991                 .stop  = ptlrpc_lprocfs_svc_req_history_stop,
 992                 .next  = ptlrpc_lprocfs_svc_req_history_next,
 993                 .show  = ptlrpc_lprocfs_svc_req_history_show,
 994         };
 995         struct proc_dir_entry *dp = PDE(inode);
 996         struct seq_file       *seqf;
 997         int                    rc;
 998
 999         LPROCFS_ENTRY_AND_CHECK(dp);
1000         rc = seq_open(file, &sops);
1001         if (rc) {
1002                 LPROCFS_EXIT();
1003                 return rc;
1004         }
1005
1006         seqf = file->private_data;
1007         seqf->private = dp->data;
1008         return 0;
1009 }
1010
1011 /* See also lprocfs_rd_timeouts */
1012 static int ptlrpc_lprocfs_rd_timeouts(char *page, char **start, off_t off,
1013                                       int count, int *eof, void *data)
1014 {
1015         struct ptlrpc_service           *svc = data;
1016         struct ptlrpc_service_part      *svcpt;
1017         struct dhms                     ts;
1018         time_t                          worstt;
1019         unsigned int                    cur;
1020         unsigned int                    worst;
1021         int                             nob = 0;
1022         int                             rc = 0;
1023         int                             i;
1024
1025         LASSERT(svc->srv_parts != NULL);
1026
1027         if (AT_OFF) {
1028                 rc += snprintf(page + rc, count - rc,
1029                                "adaptive timeouts off, using obd_timeout %u\n",
1030                                obd_timeout);
1031                 return rc;
1032         }
1033
1034         ptlrpc_service_for_each_part(svcpt, i, svc) {
1035                 cur     = at_get(&svcpt->scp_at_estimate);
1036                 worst   = svcpt->scp_at_estimate.at_worst_ever;
1037                 worstt  = svcpt->scp_at_estimate.at_worst_time;
1038                 s2dhms(&ts, cfs_time_current_sec() - worstt);
1039
1040                 nob = snprintf(page, count,
1041                                "%10s : cur %3u  worst %3u (at %ld, "
1042                                DHMS_FMT" ago) ", "service",
1043                                cur, worst, worstt, DHMS_VARS(&ts));
1044
1045                 nob = lprocfs_at_hist_helper(page, count, nob,
1046                                              &svcpt->scp_at_estimate);
1047                 rc += nob;
1048                 page += nob;
1049                 count -= nob;
1050
1051                 /*
1052                  * NB: for lustre proc read, the read count must be less
1053                  * than PAGE_SIZE, please see details in lprocfs_fops_read.
1054                  * It's unlikely that we exceed PAGE_SIZE at here because
1055                  * it means the service has more than 50 partitions.
1056                  */
1057                 if (count <= 0) {
1058                         CWARN("Can't fit AT information of %s in one page, "
1059                               "please contact with developer to fix this.\n",
1060                               svc->srv_name);
1061                         break;
1062                 }
1063         }
1064
1065         return rc;
1066 }
1067
1068 static int ptlrpc_lprocfs_rd_hp_ratio(char *page, char **start, off_t off,
1069                                       int count, int *eof, void *data)
1070 {
1071         struct ptlrpc_service *svc = data;
1072         int rc = snprintf(page, count, "%d", svc->srv_hpreq_ratio);
1073         return rc;
1074 }
1075
1076 static int ptlrpc_lprocfs_wr_hp_ratio(struct file *file, const char *buffer,
1077                                       unsigned long count, void *data)
1078 {
1079         struct ptlrpc_service           *svc = data;
1080         int     rc;
1081         int     val;
1082
1083         rc = lprocfs_write_helper(buffer, count, &val);
1084         if (rc < 0)
1085                 return rc;
1086
1087         if (val < 0)
1088                 return -ERANGE;
1089
1090         spin_lock(&svc->srv_lock);
1091         svc->srv_hpreq_ratio = val;
1092         spin_unlock(&svc->srv_lock);
1093
1094         return count;
1095 }
1096
1097 void ptlrpc_lprocfs_register_service(struct proc_dir_entry *entry,
1098                                      struct ptlrpc_service *svc)
1099 {
1100         struct lprocfs_vars lproc_vars[] = {
1101                 {.name       = "high_priority_ratio",
1102                  .read_fptr  = ptlrpc_lprocfs_rd_hp_ratio,
1103                  .write_fptr = ptlrpc_lprocfs_wr_hp_ratio,
1104                  .data       = svc},
1105                 {.name       = "req_buffer_history_len",
1106                  .read_fptr  = ptlrpc_lprocfs_read_req_history_len,
1107                  .data       = svc},
1108                 {.name       = "req_buffer_history_max",
1109                  .write_fptr = ptlrpc_lprocfs_write_req_history_max,
1110                  .read_fptr  = ptlrpc_lprocfs_read_req_history_max,
1111                  .data       = svc},
1112                 {.name       = "threads_min",
1113                  .read_fptr  = ptlrpc_lprocfs_rd_threads_min,
1114                  .write_fptr = ptlrpc_lprocfs_wr_threads_min,
1115                  .data       = svc},
1116                 {.name       = "threads_max",
1117                  .read_fptr  = ptlrpc_lprocfs_rd_threads_max,
1118                  .write_fptr = ptlrpc_lprocfs_wr_threads_max,
1119                  .data       = svc},
1120                 {.name       = "threads_started",
1121                  .read_fptr  = ptlrpc_lprocfs_rd_threads_started,
1122                  .data       = svc},
1123                 {.name       = "timeouts",
1124                  .read_fptr  = ptlrpc_lprocfs_rd_timeouts,
1125                  .data       = svc},
1126                 {.name       = "nrs_policies",
1127                  .read_fptr  = ptlrpc_lprocfs_rd_nrs,
1128                  .write_fptr = ptlrpc_lprocfs_wr_nrs,
1129                  .data       = svc},
1130                 {NULL}
1131         };
1132         static struct file_operations req_history_fops = {
1133                 .owner       = THIS_MODULE,
1134                 .open        = ptlrpc_lprocfs_svc_req_history_open,
1135                 .read        = seq_read,
1136                 .llseek      = seq_lseek,
1137                 .release     = lprocfs_seq_release,
1138         };
1139
1140         int rc;
1141
1142         ptlrpc_lprocfs_register(entry, svc->srv_name,
1143                                 "stats", &svc->srv_procroot,
1144                                 &svc->srv_stats);
1145
1146         if (svc->srv_procroot == NULL)
1147                 return;
1148
1149         lprocfs_add_vars(svc->srv_procroot, lproc_vars, NULL);
1150
1151         rc = lprocfs_seq_create(svc->srv_procroot, "req_history",
1152                                 0400, &req_history_fops, svc);
1153         if (rc)
1154                 CWARN("Error adding the req_history file\n");
1155 }
1156
1157 void ptlrpc_lprocfs_register_obd(struct obd_device *obddev)
1158 {
1159         ptlrpc_lprocfs_register(obddev->obd_proc_entry, NULL, "stats",
1160                                 &obddev->obd_svc_procroot,
1161                                 &obddev->obd_svc_stats);
1162 }
1163 EXPORT_SYMBOL(ptlrpc_lprocfs_register_obd);
1164
1165 void ptlrpc_lprocfs_rpc_sent(struct ptlrpc_request *req, long amount)
1166 {
1167         struct lprocfs_stats *svc_stats;
1168         __u32 op = lustre_msg_get_opc(req->rq_reqmsg);
1169         int opc = opcode_offset(op);
1170
1171         svc_stats = req->rq_import->imp_obd->obd_svc_stats;
1172         if (svc_stats == NULL || opc <= 0)
1173                 return;
1174         LASSERT(opc < LUSTRE_MAX_OPCODES);
1175         if (!(op == LDLM_ENQUEUE || op == MDS_REINT))
1176                 lprocfs_counter_add(svc_stats, opc + EXTRA_MAX_OPCODES, amount);
1177 }
1178
1179 void ptlrpc_lprocfs_brw(struct ptlrpc_request *req, int bytes)
1180 {
1181         struct lprocfs_stats *svc_stats;
1182         int idx;
1183
1184         if (!req->rq_import)
1185                 return;
1186         svc_stats = req->rq_import->imp_obd->obd_svc_stats;
1187         if (!svc_stats)
1188                 return;
1189         idx = lustre_msg_get_opc(req->rq_reqmsg);
1190         switch (idx) {
1191         case OST_READ:
1192                 idx = BRW_READ_BYTES + PTLRPC_LAST_CNTR;
1193                 break;
1194         case OST_WRITE:
1195                 idx = BRW_WRITE_BYTES + PTLRPC_LAST_CNTR;
1196                 break;
1197         default:
1198                 LASSERTF(0, "unsupported opcode %u\n", idx);
1199                 break;
1200         }
1201
1202         lprocfs_counter_add(svc_stats, idx, bytes);
1203 }
1204
1205 EXPORT_SYMBOL(ptlrpc_lprocfs_brw);
1206
1207 void ptlrpc_lprocfs_unregister_service(struct ptlrpc_service *svc)
1208 {
1209         if (svc->srv_procroot != NULL)
1210                 lprocfs_remove(&svc->srv_procroot);
1211
1212         if (svc->srv_stats)
1213                 lprocfs_free_stats(&svc->srv_stats);
1214 }
1215
1216 void ptlrpc_lprocfs_unregister_obd(struct obd_device *obd)
1217 {
1218         if (obd->obd_svc_procroot)
1219                 lprocfs_remove(&obd->obd_svc_procroot);
1220
1221         if (obd->obd_svc_stats)
1222                 lprocfs_free_stats(&obd->obd_svc_stats);
1223 }
1224 EXPORT_SYMBOL(ptlrpc_lprocfs_unregister_obd);
1225
1226
1227 #define BUFLEN (UUID_MAX + 5)
1228
1229 int lprocfs_wr_evict_client(struct file *file, const char *buffer,
1230                             unsigned long count, void *data)
1231 {
1232         struct obd_device *obd = data;
1233         char              *kbuf;
1234         char              *tmpbuf;
1235
1236         OBD_ALLOC(kbuf, BUFLEN);
1237         if (kbuf == NULL)
1238                 return -ENOMEM;
1239
1240         /*
1241          * OBD_ALLOC() will zero kbuf, but we only copy BUFLEN - 1
1242          * bytes into kbuf, to ensure that the string is NUL-terminated.
1243          * UUID_MAX should include a trailing NUL already.
1244          */
1245         if (cfs_copy_from_user(kbuf, buffer,
1246                                min_t(unsigned long, BUFLEN - 1, count))) {
1247                 count = -EFAULT;
1248                 goto out;
1249         }
1250         tmpbuf = cfs_firststr(kbuf, min_t(unsigned long, BUFLEN - 1, count));
1251         /* Kludge code(deadlock situation): the lprocfs lock has been held
1252          * since the client is evicted by writting client's
1253          * uuid/nid to procfs "evict_client" entry. However,
1254          * obd_export_evict_by_uuid() will call lprocfs_remove() to destroy
1255          * the proc entries under the being destroyed export{}, so I have
1256          * to drop the lock at first here.
1257          * - jay, jxiong@clusterfs.com */
1258         LPROCFS_EXIT();
1259         class_incref(obd, __FUNCTION__, cfs_current());
1260
1261         if (strncmp(tmpbuf, "nid:", 4) == 0)
1262                 obd_export_evict_by_nid(obd, tmpbuf + 4);
1263         else if (strncmp(tmpbuf, "uuid:", 5) == 0)
1264                 obd_export_evict_by_uuid(obd, tmpbuf + 5);
1265         else
1266                 obd_export_evict_by_uuid(obd, tmpbuf);
1267
1268         class_decref(obd, __FUNCTION__, cfs_current());
1269         LPROCFS_ENTRY();
1270
1271 out:
1272         OBD_FREE(kbuf, BUFLEN);
1273         return count;
1274 }
1275 EXPORT_SYMBOL(lprocfs_wr_evict_client);
1276
1277 #undef BUFLEN
1278
1279 int lprocfs_wr_ping(struct file *file, const char *buffer,
1280                     unsigned long count, void *data)
1281 {
1282         struct obd_device     *obd = data;
1283         struct ptlrpc_request *req;
1284         int                    rc;
1285         ENTRY;
1286
1287         LPROCFS_CLIMP_CHECK(obd);
1288         req = ptlrpc_prep_ping(obd->u.cli.cl_import);
1289         LPROCFS_CLIMP_EXIT(obd);
1290         if (req == NULL)
1291                 RETURN(-ENOMEM);
1292
1293         req->rq_send_state = LUSTRE_IMP_FULL;
1294
1295         rc = ptlrpc_queue_wait(req);
1296
1297         ptlrpc_req_finished(req);
1298         if (rc >= 0)
1299                 RETURN(count);
1300         RETURN(rc);
1301 }
1302 EXPORT_SYMBOL(lprocfs_wr_ping);
1303
1304 /* Write the connection UUID to this file to attempt to connect to that node.
1305  * The connection UUID is a node's primary NID. For example,
1306  * "echo connection=192.168.0.1@tcp0::instance > .../import".
1307  */
1308 int lprocfs_wr_import(struct file *file, const char *buffer,
1309                       unsigned long count, void *data)
1310 {
1311         struct obd_device *obd = data;
1312         struct obd_import *imp = obd->u.cli.cl_import;
1313         char *kbuf = NULL;
1314         char *uuid;
1315         char *ptr;
1316         int do_reconn = 1;
1317         const char prefix[] = "connection=";
1318         const int prefix_len = sizeof(prefix) - 1;
1319
1320         if (count > CFS_PAGE_SIZE - 1 || count <= prefix_len)
1321                 return -EINVAL;
1322
1323         OBD_ALLOC(kbuf, count + 1);
1324         if (kbuf == NULL)
1325                 return -ENOMEM;
1326
1327         if (cfs_copy_from_user(kbuf, buffer, count))
1328                 GOTO(out, count = -EFAULT);
1329
1330         kbuf[count] = 0;
1331
1332         /* only support connection=uuid::instance now */
1333         if (strncmp(prefix, kbuf, prefix_len) != 0)
1334                 GOTO(out, count = -EINVAL);
1335
1336         uuid = kbuf + prefix_len;
1337         ptr = strstr(uuid, "::");
1338         if (ptr) {
1339                 __u32 inst;
1340                 char *endptr;
1341
1342                 *ptr = 0;
1343                 do_reconn = 0;
1344                 ptr += strlen("::");
1345                 inst = simple_strtol(ptr, &endptr, 10);
1346                 if (*endptr) {
1347                         CERROR("config: wrong instance # %s\n", ptr);
1348                 } else if (inst != imp->imp_connect_data.ocd_instance) {
1349                         CDEBUG(D_INFO, "IR: %s is connecting to an obsoleted "
1350                                "target(%u/%u), reconnecting...\n",
1351                                imp->imp_obd->obd_name,
1352                                imp->imp_connect_data.ocd_instance, inst);
1353                         do_reconn = 1;
1354                 } else {
1355                         CDEBUG(D_INFO, "IR: %s has already been connecting to "
1356                                "new target(%u)\n",
1357                                imp->imp_obd->obd_name, inst);
1358                 }
1359         }
1360
1361         if (do_reconn)
1362                 ptlrpc_recover_import(imp, uuid, 1);
1363
1364 out:
1365         OBD_FREE(kbuf, count + 1);
1366         return count;
1367 }
1368 EXPORT_SYMBOL(lprocfs_wr_import);
1369
1370 int lprocfs_rd_pinger_recov(char *page, char **start, off_t off,
1371                             int count, int *eof, void *data)
1372 {
1373         struct obd_device *obd = data;
1374         struct obd_import *imp = obd->u.cli.cl_import;
1375         int rc;
1376
1377         LPROCFS_CLIMP_CHECK(obd);
1378         rc = snprintf(page, count, "%d\n", !imp->imp_no_pinger_recover);
1379         LPROCFS_CLIMP_EXIT(obd);
1380
1381         return rc;
1382 }
1383 EXPORT_SYMBOL(lprocfs_rd_pinger_recov);
1384
1385 int lprocfs_wr_pinger_recov(struct file *file, const char *buffer,
1386                       unsigned long count, void *data)
1387 {
1388         struct obd_device *obd = data;
1389         struct client_obd *cli = &obd->u.cli;
1390         struct obd_import *imp = cli->cl_import;
1391         int rc, val;
1392
1393         rc = lprocfs_write_helper(buffer, count, &val);
1394         if (rc < 0)
1395                 return rc;
1396
1397         if (val != 0 && val != 1)
1398                 return -ERANGE;
1399
1400         LPROCFS_CLIMP_CHECK(obd);
1401         spin_lock(&imp->imp_lock);
1402         imp->imp_no_pinger_recover = !val;
1403         spin_unlock(&imp->imp_lock);
1404         LPROCFS_CLIMP_EXIT(obd);
1405
1406         return count;
1407
1408 }
1409 EXPORT_SYMBOL(lprocfs_wr_pinger_recov);
1410
1411 #endif /* LPROCFS */