drivers/staging/lustre/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, 2015, 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 #include "../include/obd_support.h"
  39 #include "../include/obd.h"
  40 #include "../include/lprocfs_status.h"
  41 #include "../include/lustre/lustre_idl.h"
  42 #include "../include/lustre_net.h"
  43 #include "../include/obd_class.h"
  44 #include "ptlrpc_internal.h"
  45
  46 static struct ll_rpc_opcode {
  47         __u32       opcode;
  48         const char *opname;
  49 } ll_rpc_opcode_table[LUSTRE_MAX_OPCODES] = {
  50         { OST_REPLY,    "ost_reply" },
  51         { OST_GETATTR,      "ost_getattr" },
  52         { OST_SETATTR,      "ost_setattr" },
  53         { OST_READ,      "ost_read" },
  54         { OST_WRITE,    "ost_write" },
  55         { OST_CREATE,       "ost_create" },
  56         { OST_DESTROY,      "ost_destroy" },
  57         { OST_GET_INFO,     "ost_get_info" },
  58         { OST_CONNECT,      "ost_connect" },
  59         { OST_DISCONNECT,   "ost_disconnect" },
  60         { OST_PUNCH,    "ost_punch" },
  61         { OST_OPEN,      "ost_open" },
  62         { OST_CLOSE,    "ost_close" },
  63         { OST_STATFS,       "ost_statfs" },
  64         { 14,           NULL },    /* formerly OST_SAN_READ */
  65         { 15,           NULL },    /* formerly OST_SAN_WRITE */
  66         { OST_SYNC,      "ost_sync" },
  67         { OST_SET_INFO,     "ost_set_info" },
  68         { OST_QUOTACHECK,   "ost_quotacheck" },
  69         { OST_QUOTACTL,     "ost_quotactl" },
  70         { OST_QUOTA_ADJUST_QUNIT, "ost_quota_adjust_qunit" },
  71         { MDS_GETATTR,      "mds_getattr" },
  72         { MDS_GETATTR_NAME, "mds_getattr_lock" },
  73         { MDS_CLOSE,    "mds_close" },
  74         { MDS_REINT,    "mds_reint" },
  75         { MDS_READPAGE,     "mds_readpage" },
  76         { MDS_CONNECT,      "mds_connect" },
  77         { MDS_DISCONNECT,   "mds_disconnect" },
  78         { MDS_GETSTATUS,    "mds_getstatus" },
  79         { MDS_STATFS,       "mds_statfs" },
  80         { MDS_PIN,        "mds_pin" },
  81         { MDS_UNPIN,    "mds_unpin" },
  82         { MDS_SYNC,      "mds_sync" },
  83         { MDS_DONE_WRITING, "mds_done_writing" },
  84         { MDS_SET_INFO,     "mds_set_info" },
  85         { MDS_QUOTACHECK,   "mds_quotacheck" },
  86         { MDS_QUOTACTL,     "mds_quotactl" },
  87         { MDS_GETXATTR,     "mds_getxattr" },
  88         { MDS_SETXATTR,     "mds_setxattr" },
  89         { MDS_WRITEPAGE,    "mds_writepage" },
  90         { MDS_IS_SUBDIR,    "mds_is_subdir" },
  91         { MDS_GET_INFO,     "mds_get_info" },
  92         { MDS_HSM_STATE_GET, "mds_hsm_state_get" },
  93         { MDS_HSM_STATE_SET, "mds_hsm_state_set" },
  94         { MDS_HSM_ACTION,   "mds_hsm_action" },
  95         { MDS_HSM_PROGRESS, "mds_hsm_progress" },
  96         { MDS_HSM_REQUEST,  "mds_hsm_request" },
  97         { MDS_HSM_CT_REGISTER, "mds_hsm_ct_register" },
  98         { MDS_HSM_CT_UNREGISTER, "mds_hsm_ct_unregister" },
  99         { MDS_SWAP_LAYOUTS,     "mds_swap_layouts" },
 100         { LDLM_ENQUEUE,     "ldlm_enqueue" },
 101         { LDLM_CONVERT,     "ldlm_convert" },
 102         { LDLM_CANCEL,      "ldlm_cancel" },
 103         { LDLM_BL_CALLBACK, "ldlm_bl_callback" },
 104         { LDLM_CP_CALLBACK, "ldlm_cp_callback" },
 105         { LDLM_GL_CALLBACK, "ldlm_gl_callback" },
 106         { LDLM_SET_INFO,    "ldlm_set_info" },
 107         { MGS_CONNECT,      "mgs_connect" },
 108         { MGS_DISCONNECT,   "mgs_disconnect" },
 109         { MGS_EXCEPTION,    "mgs_exception" },
 110         { MGS_TARGET_REG,   "mgs_target_reg" },
 111         { MGS_TARGET_DEL,   "mgs_target_del" },
 112         { MGS_SET_INFO,     "mgs_set_info" },
 113         { MGS_CONFIG_READ,  "mgs_config_read" },
 114         { OBD_PING,      "obd_ping" },
 115         { OBD_LOG_CANCEL,       "llog_cancel" },
 116         { OBD_QC_CALLBACK,  "obd_quota_callback" },
 117         { OBD_IDX_READ,     "dt_index_read" },
 118         { LLOG_ORIGIN_HANDLE_CREATE,     "llog_origin_handle_open" },
 119         { LLOG_ORIGIN_HANDLE_NEXT_BLOCK, "llog_origin_handle_next_block" },
 120         { LLOG_ORIGIN_HANDLE_READ_HEADER, "llog_origin_handle_read_header" },
 121         { LLOG_ORIGIN_HANDLE_WRITE_REC,  "llog_origin_handle_write_rec" },
 122         { LLOG_ORIGIN_HANDLE_CLOSE,      "llog_origin_handle_close" },
 123         { LLOG_ORIGIN_CONNECT,     "llog_origin_connect" },
 124         { LLOG_CATINFO,           "llog_catinfo" },
 125         { LLOG_ORIGIN_HANDLE_PREV_BLOCK, "llog_origin_handle_prev_block" },
 126         { LLOG_ORIGIN_HANDLE_DESTROY,    "llog_origin_handle_destroy" },
 127         { QUOTA_DQACQ,      "quota_acquire" },
 128         { QUOTA_DQREL,      "quota_release" },
 129         { SEQ_QUERY,    "seq_query" },
 130         { SEC_CTX_INIT,     "sec_ctx_init" },
 131         { SEC_CTX_INIT_CONT, "sec_ctx_init_cont" },
 132         { SEC_CTX_FINI,     "sec_ctx_fini" },
 133         { FLD_QUERY,    "fld_query" },
 134 };
 135
 136 static struct ll_eopcode {
 137         __u32       opcode;
 138         const char *opname;
 139 } ll_eopcode_table[EXTRA_LAST_OPC] = {
 140         { LDLM_GLIMPSE_ENQUEUE, "ldlm_glimpse_enqueue" },
 141         { LDLM_PLAIN_ENQUEUE,   "ldlm_plain_enqueue" },
 142         { LDLM_EXTENT_ENQUEUE,  "ldlm_extent_enqueue" },
 143         { LDLM_FLOCK_ENQUEUE,   "ldlm_flock_enqueue" },
 144         { LDLM_IBITS_ENQUEUE,   "ldlm_ibits_enqueue" },
 145         { MDS_REINT_SETATTR,    "mds_reint_setattr" },
 146         { MDS_REINT_CREATE,     "mds_reint_create" },
 147         { MDS_REINT_LINK,       "mds_reint_link" },
 148         { MDS_REINT_UNLINK,     "mds_reint_unlink" },
 149         { MDS_REINT_RENAME,     "mds_reint_rename" },
 150         { MDS_REINT_OPEN,       "mds_reint_open" },
 151         { MDS_REINT_SETXATTR,   "mds_reint_setxattr" },
 152         { BRW_READ_BYTES,       "read_bytes" },
 153         { BRW_WRITE_BYTES,      "write_bytes" },
 154 };
 155
 156 const char *ll_opcode2str(__u32 opcode)
 157 {
 158         /* When one of the assertions below fail, chances are that:
 159          *     1) A new opcode was added in include/lustre/lustre_idl.h,
 160          *      but is missing from the table above.
 161          * or  2) The opcode space was renumbered or rearranged,
 162          *      and the opcode_offset() function in
 163          *      ptlrpc_internal.h needs to be modified.
 164          */
 165         __u32 offset = opcode_offset(opcode);
 166
 167         LASSERTF(offset < LUSTRE_MAX_OPCODES,
 168                  "offset %u >= LUSTRE_MAX_OPCODES %u\n",
 169                  offset, LUSTRE_MAX_OPCODES);
 170         LASSERTF(ll_rpc_opcode_table[offset].opcode == opcode,
 171                  "ll_rpc_opcode_table[%u].opcode %u != opcode %u\n",
 172                  offset, ll_rpc_opcode_table[offset].opcode, opcode);
 173         return ll_rpc_opcode_table[offset].opname;
 174 }
 175
 176 static const char *ll_eopcode2str(__u32 opcode)
 177 {
 178         LASSERT(ll_eopcode_table[opcode].opcode == opcode);
 179         return ll_eopcode_table[opcode].opname;
 180 }
 181
 182 static void
 183 ptlrpc_ldebugfs_register(struct dentry *root, char *dir,
 184                          char *name,
 185                          struct dentry **debugfs_root_ret,
 186                          struct lprocfs_stats **stats_ret)
 187 {
 188         struct dentry *svc_debugfs_entry;
 189         struct lprocfs_stats *svc_stats;
 190         int i, rc;
 191         unsigned int svc_counter_config = LPROCFS_CNTR_AVGMINMAX |
 192                                           LPROCFS_CNTR_STDDEV;
 193
 194         LASSERT(!*debugfs_root_ret);
 195         LASSERT(!*stats_ret);
 196
 197         svc_stats = lprocfs_alloc_stats(EXTRA_MAX_OPCODES+LUSTRE_MAX_OPCODES,
 198                                         0);
 199         if (!svc_stats)
 200                 return;
 201
 202         if (dir) {
 203                 svc_debugfs_entry = ldebugfs_register(dir, root, NULL, NULL);
 204                 if (IS_ERR(svc_debugfs_entry)) {
 205                         lprocfs_free_stats(&svc_stats);
 206                         return;
 207                 }
 208         } else {
 209                 svc_debugfs_entry = 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
 241                 lprocfs_counter_init(svc_stats,
 242                                      EXTRA_MAX_OPCODES + i, svc_counter_config,
 243                                      ll_opcode2str(opcode), "usec");
 244         }
 245
 246         rc = ldebugfs_register_stats(svc_debugfs_entry, name, svc_stats);
 247         if (rc < 0) {
 248                 if (dir)
 249                         ldebugfs_remove(&svc_debugfs_entry);
 250                 lprocfs_free_stats(&svc_stats);
 251         } else {
 252                 if (dir)
 253                         *debugfs_root_ret = svc_debugfs_entry;
 254                 *stats_ret = svc_stats;
 255         }
 256 }
 257
 258 static int
 259 ptlrpc_lprocfs_req_history_len_seq_show(struct seq_file *m, void *v)
 260 {
 261         struct ptlrpc_service *svc = m->private;
 262         struct ptlrpc_service_part *svcpt;
 263         int total = 0;
 264         int i;
 265
 266         ptlrpc_service_for_each_part(svcpt, i, svc)
 267                 total += svcpt->scp_hist_nrqbds;
 268
 269         seq_printf(m, "%d\n", total);
 270         return 0;
 271 }
 272
 273 LPROC_SEQ_FOPS_RO(ptlrpc_lprocfs_req_history_len);
 274
 275 static int
 276 ptlrpc_lprocfs_req_history_max_seq_show(struct seq_file *m, void *n)
 277 {
 278         struct ptlrpc_service *svc = m->private;
 279         struct ptlrpc_service_part *svcpt;
 280         int total = 0;
 281         int i;
 282
 283         ptlrpc_service_for_each_part(svcpt, i, svc)
 284                 total += svc->srv_hist_nrqbds_cpt_max;
 285
 286         seq_printf(m, "%d\n", total);
 287         return 0;
 288 }
 289
 290 static ssize_t
 291 ptlrpc_lprocfs_req_history_max_seq_write(struct file *file,
 292                                          const char __user *buffer,
 293                                          size_t count, loff_t *off)
 294 {
 295         struct ptlrpc_service *svc = ((struct seq_file *)file->private_data)->private;
 296         int bufpages;
 297         int val;
 298         int rc;
 299
 300         rc = lprocfs_write_helper(buffer, count, &val);
 301         if (rc < 0)
 302                 return rc;
 303
 304         if (val < 0)
 305                 return -ERANGE;
 306
 307         /* This sanity check is more of an insanity check; we can still
 308          * hose a kernel by allowing the request history to grow too
 309          * far.
 310          */
 311         bufpages = (svc->srv_buf_size + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
 312         if (val > totalram_pages / (2 * bufpages))
 313                 return -ERANGE;
 314
 315         spin_lock(&svc->srv_lock);
 316
 317         if (val == 0)
 318                 svc->srv_hist_nrqbds_cpt_max = 0;
 319         else
 320                 svc->srv_hist_nrqbds_cpt_max = max(1, (val / svc->srv_ncpts));
 321
 322         spin_unlock(&svc->srv_lock);
 323
 324         return count;
 325 }
 326
 327 LPROC_SEQ_FOPS(ptlrpc_lprocfs_req_history_max);
 328
 329 static ssize_t threads_min_show(struct kobject *kobj, struct attribute *attr,
 330                                 char *buf)
 331 {
 332         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
 333                                                   srv_kobj);
 334
 335         return sprintf(buf, "%d\n", svc->srv_nthrs_cpt_init * svc->srv_ncpts);
 336 }
 337
 338 static ssize_t threads_min_store(struct kobject *kobj, struct attribute *attr,
 339                                  const char *buffer, size_t count)
 340 {
 341         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
 342                                                   srv_kobj);
 343         unsigned long val;
 344         int rc = kstrtoul(buffer, 10, &val);
 345
 346         if (rc < 0)
 347                 return rc;
 348
 349         if (val / svc->srv_ncpts < PTLRPC_NTHRS_INIT)
 350                 return -ERANGE;
 351
 352         spin_lock(&svc->srv_lock);
 353         if (val > svc->srv_nthrs_cpt_limit * svc->srv_ncpts) {
 354                 spin_unlock(&svc->srv_lock);
 355                 return -ERANGE;
 356         }
 357
 358         svc->srv_nthrs_cpt_init = val / svc->srv_ncpts;
 359
 360         spin_unlock(&svc->srv_lock);
 361
 362         return count;
 363 }
 364 LUSTRE_RW_ATTR(threads_min);
 365
 366 static ssize_t threads_started_show(struct kobject *kobj,
 367                                     struct attribute *attr,
 368                                     char *buf)
 369 {
 370         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
 371                                                   srv_kobj);
 372         struct ptlrpc_service_part *svcpt;
 373         int total = 0;
 374         int i;
 375
 376         ptlrpc_service_for_each_part(svcpt, i, svc)
 377                 total += svcpt->scp_nthrs_running;
 378
 379         return sprintf(buf, "%d\n", total);
 380 }
 381 LUSTRE_RO_ATTR(threads_started);
 382
 383 static ssize_t threads_max_show(struct kobject *kobj, struct attribute *attr,
 384                                 char *buf)
 385 {
 386         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
 387                                                   srv_kobj);
 388
 389         return sprintf(buf, "%d\n", svc->srv_nthrs_cpt_limit * svc->srv_ncpts);
 390 }
 391
 392 static ssize_t threads_max_store(struct kobject *kobj, struct attribute *attr,
 393                                  const char *buffer, size_t count)
 394 {
 395         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
 396                                                   srv_kobj);
 397         unsigned long val;
 398         int rc = kstrtoul(buffer, 10, &val);
 399
 400         if (rc < 0)
 401                 return rc;
 402
 403         if (val / svc->srv_ncpts < PTLRPC_NTHRS_INIT)
 404                 return -ERANGE;
 405
 406         spin_lock(&svc->srv_lock);
 407         if (val < svc->srv_nthrs_cpt_init * svc->srv_ncpts) {
 408                 spin_unlock(&svc->srv_lock);
 409                 return -ERANGE;
 410         }
 411
 412         svc->srv_nthrs_cpt_limit = val / svc->srv_ncpts;
 413
 414         spin_unlock(&svc->srv_lock);
 415
 416         return count;
 417 }
 418 LUSTRE_RW_ATTR(threads_max);
 419
 420 /**
 421  * \addtogoup nrs
 422  * @{
 423  */
 424
 425 /**
 426  * Translates \e ptlrpc_nrs_pol_state values to human-readable strings.
 427  *
 428  * \param[in] state The policy state
 429  */
 430 static const char *nrs_state2str(enum ptlrpc_nrs_pol_state state)
 431 {
 432         switch (state) {
 433         default:
 434                 LBUG();
 435         case NRS_POL_STATE_INVALID:
 436                 return "invalid";
 437         case NRS_POL_STATE_STOPPED:
 438                 return "stopped";
 439         case NRS_POL_STATE_STOPPING:
 440                 return "stopping";
 441         case NRS_POL_STATE_STARTING:
 442                 return "starting";
 443         case NRS_POL_STATE_STARTED:
 444                 return "started";
 445         }
 446 }
 447
 448 /**
 449  * Obtains status information for \a policy.
 450  *
 451  * Information is copied in \a info.
 452  *
 453  * \param[in] policy The policy
 454  * \param[out] info  Holds returned status information
 455  */
 456 static void nrs_policy_get_info_locked(struct ptlrpc_nrs_policy *policy,
 457                                        struct ptlrpc_nrs_pol_info *info)
 458 {
 459         assert_spin_locked(&policy->pol_nrs->nrs_lock);
 460
 461         memcpy(info->pi_name, policy->pol_desc->pd_name, NRS_POL_NAME_MAX);
 462
 463         info->pi_fallback    = !!(policy->pol_flags & PTLRPC_NRS_FL_FALLBACK);
 464         info->pi_state       = policy->pol_state;
 465         /**
 466          * XXX: These are accessed without holding
 467          * ptlrpc_service_part::scp_req_lock.
 468          */
 469         info->pi_req_queued  = policy->pol_req_queued;
 470         info->pi_req_started = policy->pol_req_started;
 471 }
 472
 473 /**
 474  * Reads and prints policy status information for all policies of a PTLRPC
 475  * service.
 476  */
 477 static int ptlrpc_lprocfs_nrs_seq_show(struct seq_file *m, void *n)
 478 {
 479         struct ptlrpc_service *svc = m->private;
 480         struct ptlrpc_service_part *svcpt;
 481         struct ptlrpc_nrs *nrs;
 482         struct ptlrpc_nrs_policy *policy;
 483         struct ptlrpc_nrs_pol_info *infos;
 484         struct ptlrpc_nrs_pol_info tmp;
 485         unsigned num_pols;
 486         unsigned pol_idx = 0;
 487         bool hp = false;
 488         int i;
 489         int rc = 0;
 490
 491         /**
 492          * Serialize NRS core lprocfs operations with policy registration/
 493          * unregistration.
 494          */
 495         mutex_lock(&nrs_core.nrs_mutex);
 496
 497         /**
 498          * Use the first service partition's regular NRS head in order to obtain
 499          * the number of policies registered with NRS heads of this service. All
 500          * service partitions will have the same number of policies.
 501          */
 502         nrs = nrs_svcpt2nrs(svc->srv_parts[0], false);
 503
 504         spin_lock(&nrs->nrs_lock);
 505         num_pols = svc->srv_parts[0]->scp_nrs_reg.nrs_num_pols;
 506         spin_unlock(&nrs->nrs_lock);
 507
 508         infos = kcalloc(num_pols, sizeof(*infos), GFP_NOFS);
 509         if (!infos) {
 510                 rc = -ENOMEM;
 511                 goto unlock;
 512         }
 513 again:
 514
 515         ptlrpc_service_for_each_part(svcpt, i, svc) {
 516                 nrs = nrs_svcpt2nrs(svcpt, hp);
 517                 spin_lock(&nrs->nrs_lock);
 518
 519                 pol_idx = 0;
 520
 521                 list_for_each_entry(policy, &nrs->nrs_policy_list, pol_list) {
 522                         LASSERT(pol_idx < num_pols);
 523
 524                         nrs_policy_get_info_locked(policy, &tmp);
 525                         /**
 526                          * Copy values when handling the first service
 527                          * partition.
 528                          */
 529                         if (i == 0) {
 530                                 memcpy(infos[pol_idx].pi_name, tmp.pi_name,
 531                                        NRS_POL_NAME_MAX);
 532                                 memcpy(&infos[pol_idx].pi_state, &tmp.pi_state,
 533                                        sizeof(tmp.pi_state));
 534                                 infos[pol_idx].pi_fallback = tmp.pi_fallback;
 535                                 /**
 536                                  * For the rest of the service partitions
 537                                  * sanity-check the values we get.
 538                                  */
 539                         } else {
 540                                 LASSERT(strncmp(infos[pol_idx].pi_name,
 541                                                 tmp.pi_name,
 542                                                 NRS_POL_NAME_MAX) == 0);
 543                                 /**
 544                                  * Not asserting ptlrpc_nrs_pol_info::pi_state,
 545                                  * because it may be different between
 546                                  * instances of the same policy in different
 547                                  * service partitions.
 548                                  */
 549                                 LASSERT(infos[pol_idx].pi_fallback ==
 550                                         tmp.pi_fallback);
 551                         }
 552
 553                         infos[pol_idx].pi_req_queued += tmp.pi_req_queued;
 554                         infos[pol_idx].pi_req_started += tmp.pi_req_started;
 555
 556                         pol_idx++;
 557                 }
 558                 spin_unlock(&nrs->nrs_lock);
 559         }
 560
 561         /**
 562          * Policy status information output is in YAML format.
 563          * For example:
 564          *
 565          *      regular_requests:
 566          *        - name: fifo
 567          *          state: started
 568          *          fallback: yes
 569          *          queued: 0
 570          *          active: 0
 571          *
 572          *        - name: crrn
 573          *          state: started
 574          *          fallback: no
 575          *          queued: 2015
 576          *          active: 384
 577          *
 578          *      high_priority_requests:
 579          *        - name: fifo
 580          *          state: started
 581          *          fallback: yes
 582          *          queued: 0
 583          *          active: 2
 584          *
 585          *        - name: crrn
 586          *          state: stopped
 587          *          fallback: no
 588          *          queued: 0
 589          *          active: 0
 590          */
 591         seq_printf(m, "%s\n",
 592                    !hp ?  "\nregular_requests:" : "high_priority_requests:");
 593
 594         for (pol_idx = 0; pol_idx < num_pols; pol_idx++) {
 595                 seq_printf(m,  "  - name: %s\n"
 596                                "    state: %s\n"
 597                                "    fallback: %s\n"
 598                                "    queued: %-20d\n"
 599                                "    active: %-20d\n\n",
 600                                infos[pol_idx].pi_name,
 601                                nrs_state2str(infos[pol_idx].pi_state),
 602                                infos[pol_idx].pi_fallback ? "yes" : "no",
 603                                (int)infos[pol_idx].pi_req_queued,
 604                                (int)infos[pol_idx].pi_req_started);
 605         }
 606
 607         if (!hp && nrs_svc_has_hp(svc)) {
 608                 memset(infos, 0, num_pols * sizeof(*infos));
 609
 610                 /**
 611                  * Redo the processing for the service's HP NRS heads' policies.
 612                  */
 613                 hp = true;
 614                 goto again;
 615         }
 616
 617         kfree(infos);
 618 unlock:
 619         mutex_unlock(&nrs_core.nrs_mutex);
 620
 621         return rc;
 622 }
 623
 624 /**
 625  * The longest valid command string is the maximum policy name size, plus the
 626  * length of the " reg" substring
 627  */
 628 #define LPROCFS_NRS_WR_MAX_CMD  (NRS_POL_NAME_MAX + sizeof(" reg") - 1)
 629
 630 /**
 631  * Starts and stops a given policy on a PTLRPC service.
 632  *
 633  * Commands consist of the policy name, followed by an optional [reg|hp] token;
 634  * if the optional token is omitted, the operation is performed on both the
 635  * regular and high-priority (if the service has one) NRS head.
 636  */
 637 static ssize_t ptlrpc_lprocfs_nrs_seq_write(struct file *file,
 638                                             const char __user *buffer,
 639                                             size_t count, loff_t *off)
 640 {
 641         struct ptlrpc_service *svc = ((struct seq_file *)file->private_data)->private;
 642         enum ptlrpc_nrs_queue_type queue = PTLRPC_NRS_QUEUE_BOTH;
 643         char *cmd;
 644         char *cmd_copy = NULL;
 645         char *token;
 646         int rc = 0;
 647
 648         if (count >= LPROCFS_NRS_WR_MAX_CMD)
 649                 return -EINVAL;
 650
 651         cmd = kzalloc(LPROCFS_NRS_WR_MAX_CMD, GFP_NOFS);
 652         if (!cmd)
 653                 return -ENOMEM;
 654         /**
 655          * strsep() modifies its argument, so keep a copy
 656          */
 657         cmd_copy = cmd;
 658
 659         if (copy_from_user(cmd, buffer, count)) {
 660                 rc = -EFAULT;
 661                 goto out;
 662         }
 663
 664         cmd[count] = '\0';
 665
 666         token = strsep(&cmd, " ");
 667
 668         if (strlen(token) > NRS_POL_NAME_MAX - 1) {
 669                 rc = -EINVAL;
 670                 goto out;
 671         }
 672
 673         /**
 674          * No [reg|hp] token has been specified
 675          */
 676         if (!cmd)
 677                 goto default_queue;
 678
 679         /**
 680          * The second token is either NULL, or an optional [reg|hp] string
 681          */
 682         if (strcmp(cmd, "reg") == 0)
 683                 queue = PTLRPC_NRS_QUEUE_REG;
 684         else if (strcmp(cmd, "hp") == 0)
 685                 queue = PTLRPC_NRS_QUEUE_HP;
 686         else {
 687                 rc = -EINVAL;
 688                 goto out;
 689         }
 690
 691 default_queue:
 692
 693         if (queue == PTLRPC_NRS_QUEUE_HP && !nrs_svc_has_hp(svc)) {
 694                 rc = -ENODEV;
 695                 goto out;
 696         } else if (queue == PTLRPC_NRS_QUEUE_BOTH && !nrs_svc_has_hp(svc))
 697                 queue = PTLRPC_NRS_QUEUE_REG;
 698
 699         /**
 700          * Serialize NRS core lprocfs operations with policy registration/
 701          * unregistration.
 702          */
 703         mutex_lock(&nrs_core.nrs_mutex);
 704
 705         rc = ptlrpc_nrs_policy_control(svc, queue, token, PTLRPC_NRS_CTL_START,
 706                                        false, NULL);
 707
 708         mutex_unlock(&nrs_core.nrs_mutex);
 709 out:
 710         kfree(cmd_copy);
 711
 712         return rc < 0 ? rc : count;
 713 }
 714
 715 LPROC_SEQ_FOPS(ptlrpc_lprocfs_nrs);
 716
 717 /** @} nrs */
 718
 719 struct ptlrpc_srh_iterator {
 720         int                     srhi_idx;
 721         __u64                   srhi_seq;
 722         struct ptlrpc_request   *srhi_req;
 723 };
 724
 725 static int
 726 ptlrpc_lprocfs_svc_req_history_seek(struct ptlrpc_service_part *svcpt,
 727                                     struct ptlrpc_srh_iterator *srhi,
 728                                     __u64 seq)
 729 {
 730         struct list_head *e;
 731         struct ptlrpc_request *req;
 732
 733         if (srhi->srhi_req && srhi->srhi_seq > svcpt->scp_hist_seq_culled &&
 734             srhi->srhi_seq <= seq) {
 735                 /* If srhi_req was set previously, hasn't been culled and
 736                  * we're searching for a seq on or after it (i.e. more
 737                  * recent), search from it onwards.
 738                  * Since the service history is LRU (i.e. culled reqs will
 739                  * be near the head), we shouldn't have to do long
 740                  * re-scans
 741                  */
 742                 LASSERTF(srhi->srhi_seq == srhi->srhi_req->rq_history_seq,
 743                          "%s:%d: seek seq %llu, request seq %llu\n",
 744                          svcpt->scp_service->srv_name, svcpt->scp_cpt,
 745                          srhi->srhi_seq, srhi->srhi_req->rq_history_seq);
 746                 LASSERTF(!list_empty(&svcpt->scp_hist_reqs),
 747                          "%s:%d: seek offset %llu, request seq %llu, last culled %llu\n",
 748                          svcpt->scp_service->srv_name, svcpt->scp_cpt,
 749                          seq, srhi->srhi_seq, svcpt->scp_hist_seq_culled);
 750                 e = &srhi->srhi_req->rq_history_list;
 751         } else {
 752                 /* search from start */
 753                 e = svcpt->scp_hist_reqs.next;
 754         }
 755
 756         while (e != &svcpt->scp_hist_reqs) {
 757                 req = list_entry(e, struct ptlrpc_request, rq_history_list);
 758
 759                 if (req->rq_history_seq >= seq) {
 760                         srhi->srhi_seq = req->rq_history_seq;
 761                         srhi->srhi_req = req;
 762                         return 0;
 763                 }
 764                 e = e->next;
 765         }
 766
 767         return -ENOENT;
 768 }
 769
 770 /*
 771  * ptlrpc history sequence is used as "position" of seq_file, in some case,
 772  * seq_read() will increase "position" to indicate reading the next
 773  * element, however, low bits of history sequence are reserved for CPT id
 774  * (check the details from comments before ptlrpc_req_add_history), which
 775  * means seq_read() might change CPT id of history sequence and never
 776  * finish reading of requests on a CPT. To make it work, we have to shift
 777  * CPT id to high bits and timestamp to low bits, so seq_read() will only
 778  * increase timestamp which can correctly indicate the next position.
 779  */
 780
 781 /* convert seq_file pos to cpt */
 782 #define PTLRPC_REQ_POS2CPT(svc, pos)                    \
 783         ((svc)->srv_cpt_bits == 0 ? 0 :                 \
 784          (__u64)(pos) >> (64 - (svc)->srv_cpt_bits))
 785
 786 /* make up seq_file pos from cpt */
 787 #define PTLRPC_REQ_CPT2POS(svc, cpt)                    \
 788         ((svc)->srv_cpt_bits == 0 ? 0 :                 \
 789          (cpt) << (64 - (svc)->srv_cpt_bits))
 790
 791 /* convert sequence to position */
 792 #define PTLRPC_REQ_SEQ2POS(svc, seq)                    \
 793         ((svc)->srv_cpt_bits == 0 ? (seq) :             \
 794          ((seq) >> (svc)->srv_cpt_bits) |               \
 795          ((seq) << (64 - (svc)->srv_cpt_bits)))
 796
 797 /* convert position to sequence */
 798 #define PTLRPC_REQ_POS2SEQ(svc, pos)                    \
 799         ((svc)->srv_cpt_bits == 0 ? (pos) :             \
 800          ((__u64)(pos) << (svc)->srv_cpt_bits) |        \
 801          ((__u64)(pos) >> (64 - (svc)->srv_cpt_bits)))
 802
 803 static void *
 804 ptlrpc_lprocfs_svc_req_history_start(struct seq_file *s, loff_t *pos)
 805 {
 806         struct ptlrpc_service           *svc = s->private;
 807         struct ptlrpc_service_part      *svcpt;
 808         struct ptlrpc_srh_iterator      *srhi;
 809         unsigned int                    cpt;
 810         int                             rc;
 811         int                             i;
 812
 813         if (sizeof(loff_t) != sizeof(__u64)) { /* can't support */
 814                 CWARN("Failed to read request history because size of loff_t %d can't match size of u64\n",
 815                       (int)sizeof(loff_t));
 816                 return NULL;
 817         }
 818
 819         srhi = kzalloc(sizeof(*srhi), GFP_NOFS);
 820         if (!srhi)
 821                 return NULL;
 822
 823         srhi->srhi_seq = 0;
 824         srhi->srhi_req = NULL;
 825
 826         cpt = PTLRPC_REQ_POS2CPT(svc, *pos);
 827
 828         ptlrpc_service_for_each_part(svcpt, i, svc) {
 829                 if (i < cpt) /* skip */
 830                         continue;
 831                 if (i > cpt) /* make up the lowest position for this CPT */
 832                         *pos = PTLRPC_REQ_CPT2POS(svc, i);
 833
 834                 spin_lock(&svcpt->scp_lock);
 835                 rc = ptlrpc_lprocfs_svc_req_history_seek(svcpt, srhi,
 836                                 PTLRPC_REQ_POS2SEQ(svc, *pos));
 837                 spin_unlock(&svcpt->scp_lock);
 838                 if (rc == 0) {
 839                         *pos = PTLRPC_REQ_SEQ2POS(svc, srhi->srhi_seq);
 840                         srhi->srhi_idx = i;
 841                         return srhi;
 842                 }
 843         }
 844
 845         kfree(srhi);
 846         return NULL;
 847 }
 848
 849 static void
 850 ptlrpc_lprocfs_svc_req_history_stop(struct seq_file *s, void *iter)
 851 {
 852         struct ptlrpc_srh_iterator *srhi = iter;
 853
 854         kfree(srhi);
 855 }
 856
 857 static void *
 858 ptlrpc_lprocfs_svc_req_history_next(struct seq_file *s,
 859                                     void *iter, loff_t *pos)
 860 {
 861         struct ptlrpc_service *svc = s->private;
 862         struct ptlrpc_srh_iterator *srhi = iter;
 863         struct ptlrpc_service_part *svcpt;
 864         __u64 seq;
 865         int rc;
 866         int i;
 867
 868         for (i = srhi->srhi_idx; i < svc->srv_ncpts; i++) {
 869                 svcpt = svc->srv_parts[i];
 870
 871                 if (i > srhi->srhi_idx) { /* reset iterator for a new CPT */
 872                         srhi->srhi_req = NULL;
 873                         seq = srhi->srhi_seq = 0;
 874                 } else { /* the next sequence */
 875                         seq = srhi->srhi_seq + (1 << svc->srv_cpt_bits);
 876                 }
 877
 878                 spin_lock(&svcpt->scp_lock);
 879                 rc = ptlrpc_lprocfs_svc_req_history_seek(svcpt, srhi, seq);
 880                 spin_unlock(&svcpt->scp_lock);
 881                 if (rc == 0) {
 882                         *pos = PTLRPC_REQ_SEQ2POS(svc, srhi->srhi_seq);
 883                         srhi->srhi_idx = i;
 884                         return srhi;
 885                 }
 886         }
 887
 888         kfree(srhi);
 889         return NULL;
 890 }
 891
 892 static int ptlrpc_lprocfs_svc_req_history_show(struct seq_file *s, void *iter)
 893 {
 894         struct ptlrpc_service *svc = s->private;
 895         struct ptlrpc_srh_iterator *srhi = iter;
 896         struct ptlrpc_service_part *svcpt;
 897         struct ptlrpc_request *req;
 898         int rc;
 899
 900         LASSERT(srhi->srhi_idx < svc->srv_ncpts);
 901
 902         svcpt = svc->srv_parts[srhi->srhi_idx];
 903
 904         spin_lock(&svcpt->scp_lock);
 905
 906         rc = ptlrpc_lprocfs_svc_req_history_seek(svcpt, srhi, srhi->srhi_seq);
 907
 908         if (rc == 0) {
 909                 char nidstr[LNET_NIDSTR_SIZE];
 910
 911                 req = srhi->srhi_req;
 912
 913                 libcfs_nid2str_r(req->rq_self, nidstr, sizeof(nidstr));
 914                 /* Print common req fields.
 915                  * CAVEAT EMPTOR: we're racing with the service handler
 916                  * here.  The request could contain any old crap, so you
 917                  * must be just as careful as the service's request
 918                  * parser. Currently I only print stuff here I know is OK
 919                  * to look at coz it was set up in request_in_callback()!!!
 920                  */
 921                 seq_printf(s, "%lld:%s:%s:x%llu:%d:%s:%lld:%lds(%+lds) ",
 922                            req->rq_history_seq, nidstr,
 923                            libcfs_id2str(req->rq_peer), req->rq_xid,
 924                            req->rq_reqlen, ptlrpc_rqphase2str(req),
 925                            (s64)req->rq_arrival_time.tv_sec,
 926                            (long)(req->rq_sent - req->rq_arrival_time.tv_sec),
 927                            (long)(req->rq_sent - req->rq_deadline));
 928                 if (!svc->srv_ops.so_req_printer)
 929                         seq_putc(s, '\n');
 930                 else
 931                         svc->srv_ops.so_req_printer(s, srhi->srhi_req);
 932         }
 933
 934         spin_unlock(&svcpt->scp_lock);
 935         return rc;
 936 }
 937
 938 static int
 939 ptlrpc_lprocfs_svc_req_history_open(struct inode *inode, struct file *file)
 940 {
 941         static struct seq_operations sops = {
 942                 .start = ptlrpc_lprocfs_svc_req_history_start,
 943                 .stop  = ptlrpc_lprocfs_svc_req_history_stop,
 944                 .next  = ptlrpc_lprocfs_svc_req_history_next,
 945                 .show  = ptlrpc_lprocfs_svc_req_history_show,
 946         };
 947         struct seq_file *seqf;
 948         int rc;
 949
 950         rc = seq_open(file, &sops);
 951         if (rc)
 952                 return rc;
 953
 954         seqf = file->private_data;
 955         seqf->private = inode->i_private;
 956         return 0;
 957 }
 958
 959 /* See also lprocfs_rd_timeouts */
 960 static int ptlrpc_lprocfs_timeouts_seq_show(struct seq_file *m, void *n)
 961 {
 962         struct ptlrpc_service *svc = m->private;
 963         struct ptlrpc_service_part *svcpt;
 964         struct dhms ts;
 965         time64_t worstt;
 966         unsigned int cur;
 967         unsigned int worst;
 968         int i;
 969
 970         if (AT_OFF) {
 971                 seq_printf(m, "adaptive timeouts off, using obd_timeout %u\n",
 972                            obd_timeout);
 973                 return 0;
 974         }
 975
 976         ptlrpc_service_for_each_part(svcpt, i, svc) {
 977                 cur     = at_get(&svcpt->scp_at_estimate);
 978                 worst   = svcpt->scp_at_estimate.at_worst_ever;
 979                 worstt  = svcpt->scp_at_estimate.at_worst_time;
 980                 s2dhms(&ts, ktime_get_real_seconds() - worstt);
 981
 982                 seq_printf(m, "%10s : cur %3u  worst %3u (at %lld, "
 983                            DHMS_FMT " ago) ", "service",
 984                            cur, worst, (s64)worstt, DHMS_VARS(&ts));
 985
 986                 lprocfs_at_hist_helper(m, &svcpt->scp_at_estimate);
 987         }
 988
 989         return 0;
 990 }
 991
 992 LPROC_SEQ_FOPS_RO(ptlrpc_lprocfs_timeouts);
 993
 994 static ssize_t high_priority_ratio_show(struct kobject *kobj,
 995                                         struct attribute *attr,
 996                                         char *buf)
 997 {
 998         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
 999                                                   srv_kobj);
1000         return sprintf(buf, "%d\n", svc->srv_hpreq_ratio);
1001 }
1002
1003 static ssize_t high_priority_ratio_store(struct kobject *kobj,
1004                                          struct attribute *attr,
1005                                          const char *buffer,
1006                                          size_t count)
1007 {
1008         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
1009                                                   srv_kobj);
1010         int rc;
1011         int val;
1012
1013         rc = kstrtoint(buffer, 10, &val);
1014         if (rc < 0)
1015                 return rc;
1016
1017         if (val < 0)
1018                 return -ERANGE;
1019
1020         spin_lock(&svc->srv_lock);
1021         svc->srv_hpreq_ratio = val;
1022         spin_unlock(&svc->srv_lock);
1023
1024         return count;
1025 }
1026 LUSTRE_RW_ATTR(high_priority_ratio);
1027
1028 static struct attribute *ptlrpc_svc_attrs[] = {
1029         &lustre_attr_threads_min.attr,
1030         &lustre_attr_threads_started.attr,
1031         &lustre_attr_threads_max.attr,
1032         &lustre_attr_high_priority_ratio.attr,
1033         NULL,
1034 };
1035
1036 static void ptlrpc_sysfs_svc_release(struct kobject *kobj)
1037 {
1038         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
1039                                                   srv_kobj);
1040
1041         complete(&svc->srv_kobj_unregister);
1042 }
1043
1044 static struct kobj_type ptlrpc_svc_ktype = {
1045         .default_attrs  = ptlrpc_svc_attrs,
1046         .sysfs_ops      = &lustre_sysfs_ops,
1047         .release        = ptlrpc_sysfs_svc_release,
1048 };
1049
1050 void ptlrpc_sysfs_unregister_service(struct ptlrpc_service *svc)
1051 {
1052         /* Let's see if we had a chance at initialization first */
1053         if (svc->srv_kobj.kset) {
1054                 kobject_put(&svc->srv_kobj);
1055                 wait_for_completion(&svc->srv_kobj_unregister);
1056         }
1057 }
1058
1059 int ptlrpc_sysfs_register_service(struct kset *parent,
1060                                   struct ptlrpc_service *svc)
1061 {
1062         int rc;
1063
1064         svc->srv_kobj.kset = parent;
1065         init_completion(&svc->srv_kobj_unregister);
1066         rc = kobject_init_and_add(&svc->srv_kobj, &ptlrpc_svc_ktype, NULL,
1067                                   "%s", svc->srv_name);
1068
1069         return rc;
1070 }
1071
1072 void ptlrpc_ldebugfs_register_service(struct dentry *entry,
1073                                       struct ptlrpc_service *svc)
1074 {
1075         struct lprocfs_vars lproc_vars[] = {
1076                 {.name       = "req_buffer_history_len",
1077                  .fops       = &ptlrpc_lprocfs_req_history_len_fops,
1078                  .data       = svc},
1079                 {.name       = "req_buffer_history_max",
1080                  .fops       = &ptlrpc_lprocfs_req_history_max_fops,
1081                  .data       = svc},
1082                 {.name       = "timeouts",
1083                  .fops       = &ptlrpc_lprocfs_timeouts_fops,
1084                  .data       = svc},
1085                 {.name       = "nrs_policies",
1086                  .fops       = &ptlrpc_lprocfs_nrs_fops,
1087                  .data       = svc},
1088                 {NULL}
1089         };
1090         static const struct file_operations req_history_fops = {
1091                 .owner       = THIS_MODULE,
1092                 .open   = ptlrpc_lprocfs_svc_req_history_open,
1093                 .read   = seq_read,
1094                 .llseek      = seq_lseek,
1095                 .release     = lprocfs_seq_release,
1096         };
1097
1098         int rc;
1099
1100         ptlrpc_ldebugfs_register(entry, svc->srv_name,
1101                                  "stats", &svc->srv_debugfs_entry,
1102                                  &svc->srv_stats);
1103
1104         if (IS_ERR_OR_NULL(svc->srv_debugfs_entry))
1105                 return;
1106
1107         ldebugfs_add_vars(svc->srv_debugfs_entry, lproc_vars, NULL);
1108
1109         rc = ldebugfs_seq_create(svc->srv_debugfs_entry, "req_history",
1110                                  0400, &req_history_fops, svc);
1111         if (rc)
1112                 CWARN("Error adding the req_history file\n");
1113 }
1114
1115 void ptlrpc_lprocfs_register_obd(struct obd_device *obddev)
1116 {
1117         ptlrpc_ldebugfs_register(obddev->obd_debugfs_entry, NULL, "stats",
1118                                  &obddev->obd_svc_debugfs_entry,
1119                                  &obddev->obd_svc_stats);
1120 }
1121 EXPORT_SYMBOL(ptlrpc_lprocfs_register_obd);
1122
1123 void ptlrpc_lprocfs_rpc_sent(struct ptlrpc_request *req, long amount)
1124 {
1125         struct lprocfs_stats *svc_stats;
1126         __u32 op = lustre_msg_get_opc(req->rq_reqmsg);
1127         int opc = opcode_offset(op);
1128
1129         svc_stats = req->rq_import->imp_obd->obd_svc_stats;
1130         if (!svc_stats || opc <= 0)
1131                 return;
1132         LASSERT(opc < LUSTRE_MAX_OPCODES);
1133         if (!(op == LDLM_ENQUEUE || op == MDS_REINT))
1134                 lprocfs_counter_add(svc_stats, opc + EXTRA_MAX_OPCODES, amount);
1135 }
1136
1137 void ptlrpc_lprocfs_brw(struct ptlrpc_request *req, int bytes)
1138 {
1139         struct lprocfs_stats *svc_stats;
1140         int idx;
1141
1142         if (!req->rq_import)
1143                 return;
1144         svc_stats = req->rq_import->imp_obd->obd_svc_stats;
1145         if (!svc_stats)
1146                 return;
1147         idx = lustre_msg_get_opc(req->rq_reqmsg);
1148         switch (idx) {
1149         case OST_READ:
1150                 idx = BRW_READ_BYTES + PTLRPC_LAST_CNTR;
1151                 break;
1152         case OST_WRITE:
1153                 idx = BRW_WRITE_BYTES + PTLRPC_LAST_CNTR;
1154                 break;
1155         default:
1156                 LASSERTF(0, "unsupported opcode %u\n", idx);
1157                 break;
1158         }
1159
1160         lprocfs_counter_add(svc_stats, idx, bytes);
1161 }
1162
1163 EXPORT_SYMBOL(ptlrpc_lprocfs_brw);
1164
1165 void ptlrpc_lprocfs_unregister_service(struct ptlrpc_service *svc)
1166 {
1167         if (!IS_ERR_OR_NULL(svc->srv_debugfs_entry))
1168                 ldebugfs_remove(&svc->srv_debugfs_entry);
1169
1170         if (svc->srv_stats)
1171                 lprocfs_free_stats(&svc->srv_stats);
1172 }
1173
1174 void ptlrpc_lprocfs_unregister_obd(struct obd_device *obd)
1175 {
1176         if (!IS_ERR_OR_NULL(obd->obd_svc_debugfs_entry))
1177                 ldebugfs_remove(&obd->obd_svc_debugfs_entry);
1178
1179         if (obd->obd_svc_stats)
1180                 lprocfs_free_stats(&obd->obd_svc_stats);
1181 }
1182 EXPORT_SYMBOL(ptlrpc_lprocfs_unregister_obd);
1183
1184 #undef BUFLEN
1185
1186 int lprocfs_wr_ping(struct file *file, const char __user *buffer,
1187                     size_t count, loff_t *off)
1188 {
1189         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
1190         struct ptlrpc_request *req;
1191         int rc;
1192
1193         rc = lprocfs_climp_check(obd);
1194         if (rc)
1195                 return rc;
1196
1197         req = ptlrpc_prep_ping(obd->u.cli.cl_import);
1198         up_read(&obd->u.cli.cl_sem);
1199         if (!req)
1200                 return -ENOMEM;
1201
1202         req->rq_send_state = LUSTRE_IMP_FULL;
1203
1204         rc = ptlrpc_queue_wait(req);
1205
1206         ptlrpc_req_finished(req);
1207         if (rc >= 0)
1208                 return count;
1209         return rc;
1210 }
1211 EXPORT_SYMBOL(lprocfs_wr_ping);
1212
1213 /* Write the connection UUID to this file to attempt to connect to that node.
1214  * The connection UUID is a node's primary NID. For example,
1215  * "echo connection=192.168.0.1@tcp0::instance > .../import".
1216  */
1217 int lprocfs_wr_import(struct file *file, const char __user *buffer,
1218                       size_t count, loff_t *off)
1219 {
1220         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
1221         struct obd_import *imp = obd->u.cli.cl_import;
1222         char *kbuf = NULL;
1223         char *uuid;
1224         char *ptr;
1225         int do_reconn = 1;
1226         const char prefix[] = "connection=";
1227         const int prefix_len = sizeof(prefix) - 1;
1228
1229         if (count > PAGE_CACHE_SIZE - 1 || count <= prefix_len)
1230                 return -EINVAL;
1231
1232         kbuf = kzalloc(count + 1, GFP_NOFS);
1233         if (!kbuf)
1234                 return -ENOMEM;
1235
1236         if (copy_from_user(kbuf, buffer, count)) {
1237                 count = -EFAULT;
1238                 goto out;
1239         }
1240
1241         kbuf[count] = 0;
1242
1243         /* only support connection=uuid::instance now */
1244         if (strncmp(prefix, kbuf, prefix_len) != 0) {
1245                 count = -EINVAL;
1246                 goto out;
1247         }
1248
1249         uuid = kbuf + prefix_len;
1250         ptr = strstr(uuid, "::");
1251         if (ptr) {
1252                 __u32 inst;
1253                 char *endptr;
1254
1255                 *ptr = 0;
1256                 do_reconn = 0;
1257                 ptr += strlen("::");
1258                 inst = simple_strtoul(ptr, &endptr, 10);
1259                 if (*endptr) {
1260                         CERROR("config: wrong instance # %s\n", ptr);
1261                 } else if (inst != imp->imp_connect_data.ocd_instance) {
1262                         CDEBUG(D_INFO, "IR: %s is connecting to an obsoleted target(%u/%u), reconnecting...\n",
1263                                imp->imp_obd->obd_name,
1264                                imp->imp_connect_data.ocd_instance, inst);
1265                         do_reconn = 1;
1266                 } else {
1267                         CDEBUG(D_INFO, "IR: %s has already been connecting to new target(%u)\n",
1268                                imp->imp_obd->obd_name, inst);
1269                 }
1270         }
1271
1272         if (do_reconn)
1273                 ptlrpc_recover_import(imp, uuid, 1);
1274
1275 out:
1276         kfree(kbuf);
1277         return count;
1278 }
1279 EXPORT_SYMBOL(lprocfs_wr_import);
1280
1281 int lprocfs_rd_pinger_recov(struct seq_file *m, void *n)
1282 {
1283         struct obd_device *obd = m->private;
1284         struct obd_import *imp = obd->u.cli.cl_import;
1285         int rc;
1286
1287         rc = lprocfs_climp_check(obd);
1288         if (rc)
1289                 return rc;
1290
1291         seq_printf(m, "%d\n", !imp->imp_no_pinger_recover);
1292         up_read(&obd->u.cli.cl_sem);
1293
1294         return 0;
1295 }
1296 EXPORT_SYMBOL(lprocfs_rd_pinger_recov);
1297
1298 int lprocfs_wr_pinger_recov(struct file *file, const char __user *buffer,
1299                             size_t count, loff_t *off)
1300 {
1301         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
1302         struct client_obd *cli = &obd->u.cli;
1303         struct obd_import *imp = cli->cl_import;
1304         int rc, val;
1305
1306         rc = lprocfs_write_helper(buffer, count, &val);
1307         if (rc < 0)
1308                 return rc;
1309
1310         if (val != 0 && val != 1)
1311                 return -ERANGE;
1312
1313         rc = lprocfs_climp_check(obd);
1314         if (rc)
1315                 return rc;
1316
1317         spin_lock(&imp->imp_lock);
1318         imp->imp_no_pinger_recover = !val;
1319         spin_unlock(&imp->imp_lock);
1320         up_read(&obd->u.cli.cl_sem);
1321
1322         return count;
1323
1324 }
1325 EXPORT_SYMBOL(lprocfs_wr_pinger_recov);