kernel/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, 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 #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         { UPDATE_OBJ,       "update_obj" },
 135 };
 136
 137 static struct ll_eopcode {
 138         __u32       opcode;
 139         const char *opname;
 140 } ll_eopcode_table[EXTRA_LAST_OPC] = {
 141         { LDLM_GLIMPSE_ENQUEUE, "ldlm_glimpse_enqueue" },
 142         { LDLM_PLAIN_ENQUEUE,   "ldlm_plain_enqueue" },
 143         { LDLM_EXTENT_ENQUEUE,  "ldlm_extent_enqueue" },
 144         { LDLM_FLOCK_ENQUEUE,   "ldlm_flock_enqueue" },
 145         { LDLM_IBITS_ENQUEUE,   "ldlm_ibits_enqueue" },
 146         { MDS_REINT_SETATTR,    "mds_reint_setattr" },
 147         { MDS_REINT_CREATE,     "mds_reint_create" },
 148         { MDS_REINT_LINK,       "mds_reint_link" },
 149         { MDS_REINT_UNLINK,     "mds_reint_unlink" },
 150         { MDS_REINT_RENAME,     "mds_reint_rename" },
 151         { MDS_REINT_OPEN,       "mds_reint_open" },
 152         { MDS_REINT_SETXATTR,   "mds_reint_setxattr" },
 153         { BRW_READ_BYTES,       "read_bytes" },
 154         { BRW_WRITE_BYTES,      "write_bytes" },
 155 };
 156
 157 const char *ll_opcode2str(__u32 opcode)
 158 {
 159         /* When one of the assertions below fail, chances are that:
 160          *     1) A new opcode was added in include/lustre/lustre_idl.h,
 161          *      but is missing from the table above.
 162          * or  2) The opcode space was renumbered or rearranged,
 163          *      and the opcode_offset() function in
 164          *      ptlrpc_internal.h needs to be modified.
 165          */
 166         __u32 offset = opcode_offset(opcode);
 167
 168         LASSERTF(offset < LUSTRE_MAX_OPCODES,
 169                  "offset %u >= LUSTRE_MAX_OPCODES %u\n",
 170                  offset, LUSTRE_MAX_OPCODES);
 171         LASSERTF(ll_rpc_opcode_table[offset].opcode == opcode,
 172                  "ll_rpc_opcode_table[%u].opcode %u != opcode %u\n",
 173                  offset, ll_rpc_opcode_table[offset].opcode, opcode);
 174         return ll_rpc_opcode_table[offset].opname;
 175 }
 176
 177 static const char *ll_eopcode2str(__u32 opcode)
 178 {
 179         LASSERT(ll_eopcode_table[opcode].opcode == opcode);
 180         return ll_eopcode_table[opcode].opname;
 181 }
 182
 183 static void
 184 ptlrpc_ldebugfs_register(struct dentry *root, char *dir,
 185                          char *name,
 186                          struct dentry **debugfs_root_ret,
 187                          struct lprocfs_stats **stats_ret)
 188 {
 189         struct dentry *svc_debugfs_entry;
 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(*debugfs_root_ret == NULL);
 196         LASSERT(*stats_ret == NULL);
 197
 198         svc_stats = lprocfs_alloc_stats(EXTRA_MAX_OPCODES+LUSTRE_MAX_OPCODES,
 199                                         0);
 200         if (svc_stats == NULL)
 201                 return;
 202
 203         if (dir != NULL) {
 204                 svc_debugfs_entry = ldebugfs_register(dir, root, NULL, NULL);
 205                 if (IS_ERR(svc_debugfs_entry)) {
 206                         lprocfs_free_stats(&svc_stats);
 207                         return;
 208                 }
 209         } else {
 210                 svc_debugfs_entry = root;
 211         }
 212
 213         lprocfs_counter_init(svc_stats, PTLRPC_REQWAIT_CNTR,
 214                              svc_counter_config, "req_waittime", "usec");
 215         lprocfs_counter_init(svc_stats, PTLRPC_REQQDEPTH_CNTR,
 216                              svc_counter_config, "req_qdepth", "reqs");
 217         lprocfs_counter_init(svc_stats, PTLRPC_REQACTIVE_CNTR,
 218                              svc_counter_config, "req_active", "reqs");
 219         lprocfs_counter_init(svc_stats, PTLRPC_TIMEOUT,
 220                              svc_counter_config, "req_timeout", "sec");
 221         lprocfs_counter_init(svc_stats, PTLRPC_REQBUF_AVAIL_CNTR,
 222                              svc_counter_config, "reqbuf_avail", "bufs");
 223         for (i = 0; i < EXTRA_LAST_OPC; i++) {
 224                 char *units;
 225
 226                 switch (i) {
 227                 case BRW_WRITE_BYTES:
 228                 case BRW_READ_BYTES:
 229                         units = "bytes";
 230                         break;
 231                 default:
 232                         units = "reqs";
 233                         break;
 234                 }
 235                 lprocfs_counter_init(svc_stats, PTLRPC_LAST_CNTR + i,
 236                                      svc_counter_config,
 237                                      ll_eopcode2str(i), units);
 238         }
 239         for (i = 0; i < LUSTRE_MAX_OPCODES; i++) {
 240                 __u32 opcode = ll_rpc_opcode_table[i].opcode;
 241
 242                 lprocfs_counter_init(svc_stats,
 243                                      EXTRA_MAX_OPCODES + i, svc_counter_config,
 244                                      ll_opcode2str(opcode), "usec");
 245         }
 246
 247         rc = ldebugfs_register_stats(svc_debugfs_entry, name, svc_stats);
 248         if (rc < 0) {
 249                 if (dir != NULL)
 250                         ldebugfs_remove(&svc_debugfs_entry);
 251                 lprocfs_free_stats(&svc_stats);
 252         } else {
 253                 if (dir != NULL)
 254                         *debugfs_root_ret = svc_debugfs_entry;
 255                 *stats_ret = svc_stats;
 256         }
 257 }
 258
 259 static int
 260 ptlrpc_lprocfs_req_history_len_seq_show(struct seq_file *m, void *v)
 261 {
 262         struct ptlrpc_service *svc = m->private;
 263         struct ptlrpc_service_part *svcpt;
 264         int total = 0;
 265         int i;
 266
 267         ptlrpc_service_for_each_part(svcpt, i, svc)
 268                 total += svcpt->scp_hist_nrqbds;
 269
 270         seq_printf(m, "%d\n", total);
 271         return 0;
 272 }
 273
 274 LPROC_SEQ_FOPS_RO(ptlrpc_lprocfs_req_history_len);
 275
 276 static int
 277 ptlrpc_lprocfs_req_history_max_seq_show(struct seq_file *m, void *n)
 278 {
 279         struct ptlrpc_service *svc = m->private;
 280         struct ptlrpc_service_part *svcpt;
 281         int total = 0;
 282         int i;
 283
 284         ptlrpc_service_for_each_part(svcpt, i, svc)
 285                 total += svc->srv_hist_nrqbds_cpt_max;
 286
 287         seq_printf(m, "%d\n", total);
 288         return 0;
 289 }
 290
 291 static ssize_t
 292 ptlrpc_lprocfs_req_history_max_seq_write(struct file *file,
 293                                          const char __user *buffer,
 294                                          size_t count, loff_t *off)
 295 {
 296         struct ptlrpc_service *svc = ((struct seq_file *)file->private_data)->private;
 297         int bufpages;
 298         int val;
 299         int rc;
 300
 301         rc = lprocfs_write_helper(buffer, count, &val);
 302         if (rc < 0)
 303                 return rc;
 304
 305         if (val < 0)
 306                 return -ERANGE;
 307
 308         /* This sanity check is more of an insanity check; we can still
 309          * hose a kernel by allowing the request history to grow too
 310          * far. */
 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         LASSERT(policy != NULL);
 460         LASSERT(info != NULL);
 461         assert_spin_locked(&policy->pol_nrs->nrs_lock);
 462
 463         memcpy(info->pi_name, policy->pol_desc->pd_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 ptlrpc_lprocfs_nrs_seq_show(struct seq_file *m, void *n)
 480 {
 481         struct ptlrpc_service *svc = m->private;
 482         struct ptlrpc_service_part *svcpt;
 483         struct ptlrpc_nrs *nrs;
 484         struct ptlrpc_nrs_policy *policy;
 485         struct ptlrpc_nrs_pol_info *infos;
 486         struct ptlrpc_nrs_pol_info tmp;
 487         unsigned num_pols;
 488         unsigned pol_idx = 0;
 489         bool hp = false;
 490         int i;
 491         int rc = 0;
 492
 493         /**
 494          * Serialize NRS core lprocfs operations with policy registration/
 495          * unregistration.
 496          */
 497         mutex_lock(&nrs_core.nrs_mutex);
 498
 499         /**
 500          * Use the first service partition's regular NRS head in order to obtain
 501          * the number of policies registered with NRS heads of this service. All
 502          * service partitions will have the same number of policies.
 503          */
 504         nrs = nrs_svcpt2nrs(svc->srv_parts[0], false);
 505
 506         spin_lock(&nrs->nrs_lock);
 507         num_pols = svc->srv_parts[0]->scp_nrs_reg.nrs_num_pols;
 508         spin_unlock(&nrs->nrs_lock);
 509
 510         infos = kcalloc(num_pols, sizeof(*infos), GFP_NOFS);
 511         if (infos == NULL) {
 512                 rc = -ENOMEM;
 513                 goto unlock;
 514         }
 515 again:
 516
 517         ptlrpc_service_for_each_part(svcpt, i, svc) {
 518                 nrs = nrs_svcpt2nrs(svcpt, hp);
 519                 spin_lock(&nrs->nrs_lock);
 520
 521                 pol_idx = 0;
 522
 523                 list_for_each_entry(policy, &nrs->nrs_policy_list,
 524                                         pol_list) {
 525                         LASSERT(pol_idx < num_pols);
 526
 527                         nrs_policy_get_info_locked(policy, &tmp);
 528                         /**
 529                          * Copy values when handling the first service
 530                          * partition.
 531                          */
 532                         if (i == 0) {
 533                                 memcpy(infos[pol_idx].pi_name, tmp.pi_name,
 534                                        NRS_POL_NAME_MAX);
 535                                 memcpy(&infos[pol_idx].pi_state, &tmp.pi_state,
 536                                        sizeof(tmp.pi_state));
 537                                 infos[pol_idx].pi_fallback = tmp.pi_fallback;
 538                                 /**
 539                                  * For the rest of the service partitions
 540                                  * sanity-check the values we get.
 541                                  */
 542                         } else {
 543                                 LASSERT(strncmp(infos[pol_idx].pi_name,
 544                                                 tmp.pi_name,
 545                                                 NRS_POL_NAME_MAX) == 0);
 546                                 /**
 547                                  * Not asserting ptlrpc_nrs_pol_info::pi_state,
 548                                  * because it may be different between
 549                                  * instances of the same policy in different
 550                                  * service partitions.
 551                                  */
 552                                 LASSERT(infos[pol_idx].pi_fallback ==
 553                                         tmp.pi_fallback);
 554                         }
 555
 556                         infos[pol_idx].pi_req_queued += tmp.pi_req_queued;
 557                         infos[pol_idx].pi_req_started += tmp.pi_req_started;
 558
 559                         pol_idx++;
 560                 }
 561                 spin_unlock(&nrs->nrs_lock);
 562         }
 563
 564         /**
 565          * Policy status information output is in YAML format.
 566          * For example:
 567          *
 568          *      regular_requests:
 569          *        - name: fifo
 570          *          state: started
 571          *          fallback: yes
 572          *          queued: 0
 573          *          active: 0
 574          *
 575          *        - name: crrn
 576          *          state: started
 577          *          fallback: no
 578          *          queued: 2015
 579          *          active: 384
 580          *
 581          *      high_priority_requests:
 582          *        - name: fifo
 583          *          state: started
 584          *          fallback: yes
 585          *          queued: 0
 586          *          active: 2
 587          *
 588          *        - name: crrn
 589          *          state: stopped
 590          *          fallback: no
 591          *          queued: 0
 592          *          active: 0
 593          */
 594         seq_printf(m, "%s\n",
 595                       !hp ?  "\nregular_requests:" : "high_priority_requests:");
 596
 597         for (pol_idx = 0; pol_idx < num_pols; pol_idx++) {
 598                 seq_printf(m,  "  - name: %s\n"
 599                                "    state: %s\n"
 600                                "    fallback: %s\n"
 601                                "    queued: %-20d\n"
 602                                "    active: %-20d\n\n",
 603                                infos[pol_idx].pi_name,
 604                                nrs_state2str(infos[pol_idx].pi_state),
 605                                infos[pol_idx].pi_fallback ? "yes" : "no",
 606                                (int)infos[pol_idx].pi_req_queued,
 607                                (int)infos[pol_idx].pi_req_started);
 608         }
 609
 610         if (!hp && nrs_svc_has_hp(svc)) {
 611                 memset(infos, 0, num_pols * sizeof(*infos));
 612
 613                 /**
 614                  * Redo the processing for the service's HP NRS heads' policies.
 615                  */
 616                 hp = true;
 617                 goto again;
 618         }
 619
 620         kfree(infos);
 621 unlock:
 622         mutex_unlock(&nrs_core.nrs_mutex);
 623
 624         return rc;
 625 }
 626
 627 /**
 628  * The longest valid command string is the maximum policy name size, plus the
 629  * length of the " reg" substring
 630  */
 631 #define LPROCFS_NRS_WR_MAX_CMD  (NRS_POL_NAME_MAX + sizeof(" reg") - 1)
 632
 633 /**
 634  * Starts and stops a given policy on a PTLRPC service.
 635  *
 636  * Commands consist of the policy name, followed by an optional [reg|hp] token;
 637  * if the optional token is omitted, the operation is performed on both the
 638  * regular and high-priority (if the service has one) NRS head.
 639  */
 640 static ssize_t ptlrpc_lprocfs_nrs_seq_write(struct file *file,
 641                                             const char __user *buffer,
 642                                             size_t count, loff_t *off)
 643 {
 644         struct ptlrpc_service *svc = ((struct seq_file *)file->private_data)->private;
 645         enum ptlrpc_nrs_queue_type queue = PTLRPC_NRS_QUEUE_BOTH;
 646         char *cmd;
 647         char *cmd_copy = NULL;
 648         char *token;
 649         int rc = 0;
 650
 651         if (count >= LPROCFS_NRS_WR_MAX_CMD)
 652                 return -EINVAL;
 653
 654         cmd = kzalloc(LPROCFS_NRS_WR_MAX_CMD, GFP_NOFS);
 655         if (!cmd)
 656                 return -ENOMEM;
 657         /**
 658          * strsep() modifies its argument, so keep a copy
 659          */
 660         cmd_copy = cmd;
 661
 662         if (copy_from_user(cmd, buffer, count)) {
 663                 rc = -EFAULT;
 664                 goto out;
 665         }
 666
 667         cmd[count] = '\0';
 668
 669         token = strsep(&cmd, " ");
 670
 671         if (strlen(token) > NRS_POL_NAME_MAX - 1) {
 672                 rc = -EINVAL;
 673                 goto out;
 674         }
 675
 676         /**
 677          * No [reg|hp] token has been specified
 678          */
 679         if (cmd == NULL)
 680                 goto default_queue;
 681
 682         /**
 683          * The second token is either NULL, or an optional [reg|hp] string
 684          */
 685         if (strcmp(cmd, "reg") == 0)
 686                 queue = PTLRPC_NRS_QUEUE_REG;
 687         else if (strcmp(cmd, "hp") == 0)
 688                 queue = PTLRPC_NRS_QUEUE_HP;
 689         else {
 690                 rc = -EINVAL;
 691                 goto out;
 692         }
 693
 694 default_queue:
 695
 696         if (queue == PTLRPC_NRS_QUEUE_HP && !nrs_svc_has_hp(svc)) {
 697                 rc = -ENODEV;
 698                 goto out;
 699         } else if (queue == PTLRPC_NRS_QUEUE_BOTH && !nrs_svc_has_hp(svc))
 700                 queue = PTLRPC_NRS_QUEUE_REG;
 701
 702         /**
 703          * Serialize NRS core lprocfs operations with policy registration/
 704          * unregistration.
 705          */
 706         mutex_lock(&nrs_core.nrs_mutex);
 707
 708         rc = ptlrpc_nrs_policy_control(svc, queue, token, PTLRPC_NRS_CTL_START,
 709                                        false, NULL);
 710
 711         mutex_unlock(&nrs_core.nrs_mutex);
 712 out:
 713         kfree(cmd_copy);
 714
 715         return rc < 0 ? rc : count;
 716 }
 717
 718 LPROC_SEQ_FOPS(ptlrpc_lprocfs_nrs);
 719
 720 /** @} nrs */
 721
 722 struct ptlrpc_srh_iterator {
 723         int                     srhi_idx;
 724         __u64                   srhi_seq;
 725         struct ptlrpc_request   *srhi_req;
 726 };
 727
 728 static int
 729 ptlrpc_lprocfs_svc_req_history_seek(struct ptlrpc_service_part *svcpt,
 730                                     struct ptlrpc_srh_iterator *srhi,
 731                                     __u64 seq)
 732 {
 733         struct list_head *e;
 734         struct ptlrpc_request *req;
 735
 736         if (srhi->srhi_req != NULL &&
 737             srhi->srhi_seq > svcpt->scp_hist_seq_culled &&
 738             srhi->srhi_seq <= seq) {
 739                 /* If srhi_req was set previously, hasn't been culled and
 740                  * we're searching for a seq on or after it (i.e. more
 741                  * recent), search from it onwards.
 742                  * Since the service history is LRU (i.e. culled reqs will
 743                  * be near the head), we shouldn't have to do long
 744                  * re-scans */
 745                 LASSERTF(srhi->srhi_seq == srhi->srhi_req->rq_history_seq,
 746                          "%s:%d: seek seq %llu, request seq %llu\n",
 747                          svcpt->scp_service->srv_name, svcpt->scp_cpt,
 748                          srhi->srhi_seq, srhi->srhi_req->rq_history_seq);
 749                 LASSERTF(!list_empty(&svcpt->scp_hist_reqs),
 750                          "%s:%d: seek offset %llu, request seq %llu, last culled %llu\n",
 751                          svcpt->scp_service->srv_name, svcpt->scp_cpt,
 752                          seq, srhi->srhi_seq, svcpt->scp_hist_seq_culled);
 753                 e = &srhi->srhi_req->rq_history_list;
 754         } else {
 755                 /* search from start */
 756                 e = svcpt->scp_hist_reqs.next;
 757         }
 758
 759         while (e != &svcpt->scp_hist_reqs) {
 760                 req = list_entry(e, struct ptlrpc_request, rq_history_list);
 761
 762                 if (req->rq_history_seq >= seq) {
 763                         srhi->srhi_seq = req->rq_history_seq;
 764                         srhi->srhi_req = req;
 765                         return 0;
 766                 }
 767                 e = e->next;
 768         }
 769
 770         return -ENOENT;
 771 }
 772
 773 /*
 774  * ptlrpc history sequence is used as "position" of seq_file, in some case,
 775  * seq_read() will increase "position" to indicate reading the next
 776  * element, however, low bits of history sequence are reserved for CPT id
 777  * (check the details from comments before ptlrpc_req_add_history), which
 778  * means seq_read() might change CPT id of history sequence and never
 779  * finish reading of requests on a CPT. To make it work, we have to shift
 780  * CPT id to high bits and timestamp to low bits, so seq_read() will only
 781  * increase timestamp which can correctly indicate the next position.
 782  */
 783
 784 /* convert seq_file pos to cpt */
 785 #define PTLRPC_REQ_POS2CPT(svc, pos)                    \
 786         ((svc)->srv_cpt_bits == 0 ? 0 :                 \
 787          (__u64)(pos) >> (64 - (svc)->srv_cpt_bits))
 788
 789 /* make up seq_file pos from cpt */
 790 #define PTLRPC_REQ_CPT2POS(svc, cpt)                    \
 791         ((svc)->srv_cpt_bits == 0 ? 0 :                 \
 792          (cpt) << (64 - (svc)->srv_cpt_bits))
 793
 794 /* convert sequence to position */
 795 #define PTLRPC_REQ_SEQ2POS(svc, seq)                    \
 796         ((svc)->srv_cpt_bits == 0 ? (seq) :             \
 797          ((seq) >> (svc)->srv_cpt_bits) |               \
 798          ((seq) << (64 - (svc)->srv_cpt_bits)))
 799
 800 /* convert position to sequence */
 801 #define PTLRPC_REQ_POS2SEQ(svc, pos)                    \
 802         ((svc)->srv_cpt_bits == 0 ? (pos) :             \
 803          ((__u64)(pos) << (svc)->srv_cpt_bits) |        \
 804          ((__u64)(pos) >> (64 - (svc)->srv_cpt_bits)))
 805
 806 static void *
 807 ptlrpc_lprocfs_svc_req_history_start(struct seq_file *s, loff_t *pos)
 808 {
 809         struct ptlrpc_service           *svc = s->private;
 810         struct ptlrpc_service_part      *svcpt;
 811         struct ptlrpc_srh_iterator      *srhi;
 812         unsigned int                    cpt;
 813         int                             rc;
 814         int                             i;
 815
 816         if (sizeof(loff_t) != sizeof(__u64)) { /* can't support */
 817                 CWARN("Failed to read request history because size of loff_t %d can't match size of u64\n",
 818                       (int)sizeof(loff_t));
 819                 return NULL;
 820         }
 821
 822         srhi = kzalloc(sizeof(*srhi), GFP_NOFS);
 823         if (!srhi)
 824                 return NULL;
 825
 826         srhi->srhi_seq = 0;
 827         srhi->srhi_req = NULL;
 828
 829         cpt = PTLRPC_REQ_POS2CPT(svc, *pos);
 830
 831         ptlrpc_service_for_each_part(svcpt, i, svc) {
 832                 if (i < cpt) /* skip */
 833                         continue;
 834                 if (i > cpt) /* make up the lowest position for this CPT */
 835                         *pos = PTLRPC_REQ_CPT2POS(svc, i);
 836
 837                 spin_lock(&svcpt->scp_lock);
 838                 rc = ptlrpc_lprocfs_svc_req_history_seek(svcpt, srhi,
 839                                 PTLRPC_REQ_POS2SEQ(svc, *pos));
 840                 spin_unlock(&svcpt->scp_lock);
 841                 if (rc == 0) {
 842                         *pos = PTLRPC_REQ_SEQ2POS(svc, srhi->srhi_seq);
 843                         srhi->srhi_idx = i;
 844                         return srhi;
 845                 }
 846         }
 847
 848         kfree(srhi);
 849         return NULL;
 850 }
 851
 852 static void
 853 ptlrpc_lprocfs_svc_req_history_stop(struct seq_file *s, void *iter)
 854 {
 855         struct ptlrpc_srh_iterator *srhi = iter;
 856
 857         kfree(srhi);
 858 }
 859
 860 static void *
 861 ptlrpc_lprocfs_svc_req_history_next(struct seq_file *s,
 862                                     void *iter, loff_t *pos)
 863 {
 864         struct ptlrpc_service *svc = s->private;
 865         struct ptlrpc_srh_iterator *srhi = iter;
 866         struct ptlrpc_service_part *svcpt;
 867         __u64 seq;
 868         int rc;
 869         int i;
 870
 871         for (i = srhi->srhi_idx; i < svc->srv_ncpts; i++) {
 872                 svcpt = svc->srv_parts[i];
 873
 874                 if (i > srhi->srhi_idx) { /* reset iterator for a new CPT */
 875                         srhi->srhi_req = NULL;
 876                         seq = srhi->srhi_seq = 0;
 877                 } else { /* the next sequence */
 878                         seq = srhi->srhi_seq + (1 << svc->srv_cpt_bits);
 879                 }
 880
 881                 spin_lock(&svcpt->scp_lock);
 882                 rc = ptlrpc_lprocfs_svc_req_history_seek(svcpt, srhi, seq);
 883                 spin_unlock(&svcpt->scp_lock);
 884                 if (rc == 0) {
 885                         *pos = PTLRPC_REQ_SEQ2POS(svc, srhi->srhi_seq);
 886                         srhi->srhi_idx = i;
 887                         return srhi;
 888                 }
 889         }
 890
 891         kfree(srhi);
 892         return NULL;
 893 }
 894
 895 static int ptlrpc_lprocfs_svc_req_history_show(struct seq_file *s, void *iter)
 896 {
 897         struct ptlrpc_service *svc = s->private;
 898         struct ptlrpc_srh_iterator *srhi = iter;
 899         struct ptlrpc_service_part *svcpt;
 900         struct ptlrpc_request *req;
 901         int rc;
 902
 903         LASSERT(srhi->srhi_idx < svc->srv_ncpts);
 904
 905         svcpt = svc->srv_parts[srhi->srhi_idx];
 906
 907         spin_lock(&svcpt->scp_lock);
 908
 909         rc = ptlrpc_lprocfs_svc_req_history_seek(svcpt, srhi, srhi->srhi_seq);
 910
 911         if (rc == 0) {
 912                 char nidstr[LNET_NIDSTR_SIZE];
 913
 914                 req = srhi->srhi_req;
 915
 916                 libcfs_nid2str_r(req->rq_self, nidstr, sizeof(nidstr));
 917                 /* Print common req fields.
 918                  * CAVEAT EMPTOR: we're racing with the service handler
 919                  * here.  The request could contain any old crap, so you
 920                  * must be just as careful as the service's request
 921                  * parser. Currently I only print stuff here I know is OK
 922                  * to look at coz it was set up in request_in_callback()!!! */
 923                 seq_printf(s, "%lld:%s:%s:x%llu:%d:%s:%lld:%lds(%+lds) ",
 924                            req->rq_history_seq, nidstr,
 925                            libcfs_id2str(req->rq_peer), req->rq_xid,
 926                            req->rq_reqlen, ptlrpc_rqphase2str(req),
 927                            (s64)req->rq_arrival_time.tv_sec,
 928                            (long)(req->rq_sent - req->rq_arrival_time.tv_sec),
 929                            (long)(req->rq_sent - req->rq_deadline));
 930                 if (svc->srv_ops.so_req_printer == NULL)
 931                         seq_putc(s, '\n');
 932                 else
 933                         svc->srv_ops.so_req_printer(s, srhi->srhi_req);
 934         }
 935
 936         spin_unlock(&svcpt->scp_lock);
 937         return rc;
 938 }
 939
 940 static int
 941 ptlrpc_lprocfs_svc_req_history_open(struct inode *inode, struct file *file)
 942 {
 943         static struct seq_operations sops = {
 944                 .start = ptlrpc_lprocfs_svc_req_history_start,
 945                 .stop  = ptlrpc_lprocfs_svc_req_history_stop,
 946                 .next  = ptlrpc_lprocfs_svc_req_history_next,
 947                 .show  = ptlrpc_lprocfs_svc_req_history_show,
 948         };
 949         struct seq_file *seqf;
 950         int rc;
 951
 952         rc = seq_open(file, &sops);
 953         if (rc)
 954                 return rc;
 955
 956         seqf = file->private_data;
 957         seqf->private = inode->i_private;
 958         return 0;
 959 }
 960
 961 /* See also lprocfs_rd_timeouts */
 962 static int ptlrpc_lprocfs_timeouts_seq_show(struct seq_file *m, void *n)
 963 {
 964         struct ptlrpc_service *svc = m->private;
 965         struct ptlrpc_service_part *svcpt;
 966         struct dhms ts;
 967         time64_t worstt;
 968         unsigned int cur;
 969         unsigned int worst;
 970         int i;
 971
 972         if (AT_OFF) {
 973                 seq_printf(m, "adaptive timeouts off, using obd_timeout %u\n",
 974                                obd_timeout);
 975                 return 0;
 976         }
 977
 978         ptlrpc_service_for_each_part(svcpt, i, svc) {
 979                 cur     = at_get(&svcpt->scp_at_estimate);
 980                 worst   = svcpt->scp_at_estimate.at_worst_ever;
 981                 worstt  = svcpt->scp_at_estimate.at_worst_time;
 982                 s2dhms(&ts, ktime_get_real_seconds() - worstt);
 983
 984                 seq_printf(m, "%10s : cur %3u  worst %3u (at %lld, "
 985                               DHMS_FMT" ago) ", "service",
 986                               cur, worst, (s64)worstt, DHMS_VARS(&ts));
 987
 988                 lprocfs_at_hist_helper(m, &svcpt->scp_at_estimate);
 989         }
 990
 991         return 0;
 992 }
 993
 994 LPROC_SEQ_FOPS_RO(ptlrpc_lprocfs_timeouts);
 995
 996 static ssize_t high_priority_ratio_show(struct kobject *kobj,
 997                                         struct attribute *attr,
 998                                         char *buf)
 999 {
1000         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
1001                                                   srv_kobj);
1002         return sprintf(buf, "%d\n", svc->srv_hpreq_ratio);
1003 }
1004
1005 static ssize_t high_priority_ratio_store(struct kobject *kobj,
1006                                          struct attribute *attr,
1007                                          const char *buffer,
1008                                          size_t count)
1009 {
1010         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
1011                                                   srv_kobj);
1012         int rc;
1013         int val;
1014
1015         rc = kstrtoint(buffer, 10, &val);
1016         if (rc < 0)
1017                 return rc;
1018
1019         if (val < 0)
1020                 return -ERANGE;
1021
1022         spin_lock(&svc->srv_lock);
1023         svc->srv_hpreq_ratio = val;
1024         spin_unlock(&svc->srv_lock);
1025
1026         return count;
1027 }
1028 LUSTRE_RW_ATTR(high_priority_ratio);
1029
1030 static struct attribute *ptlrpc_svc_attrs[] = {
1031         &lustre_attr_threads_min.attr,
1032         &lustre_attr_threads_started.attr,
1033         &lustre_attr_threads_max.attr,
1034         &lustre_attr_high_priority_ratio.attr,
1035         NULL,
1036 };
1037
1038 static void ptlrpc_sysfs_svc_release(struct kobject *kobj)
1039 {
1040         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
1041                                                   srv_kobj);
1042
1043         complete(&svc->srv_kobj_unregister);
1044 }
1045
1046 static struct kobj_type ptlrpc_svc_ktype = {
1047         .default_attrs  = ptlrpc_svc_attrs,
1048         .sysfs_ops      = &lustre_sysfs_ops,
1049         .release        = ptlrpc_sysfs_svc_release,
1050 };
1051
1052 void ptlrpc_sysfs_unregister_service(struct ptlrpc_service *svc)
1053 {
1054         /* Let's see if we had a chance at initialization first */
1055         if (svc->srv_kobj.kset) {
1056                 kobject_put(&svc->srv_kobj);
1057                 wait_for_completion(&svc->srv_kobj_unregister);
1058         }
1059 }
1060
1061 int ptlrpc_sysfs_register_service(struct kset *parent,
1062                                   struct ptlrpc_service *svc)
1063 {
1064         int rc;
1065
1066         svc->srv_kobj.kset = parent;
1067         init_completion(&svc->srv_kobj_unregister);
1068         rc = kobject_init_and_add(&svc->srv_kobj, &ptlrpc_svc_ktype, NULL,
1069                                   "%s", svc->srv_name);
1070
1071         return rc;
1072 }
1073
1074 void ptlrpc_ldebugfs_register_service(struct dentry *entry,
1075                                       struct ptlrpc_service *svc)
1076 {
1077         struct lprocfs_vars lproc_vars[] = {
1078                 {.name       = "req_buffer_history_len",
1079                  .fops       = &ptlrpc_lprocfs_req_history_len_fops,
1080                  .data       = svc},
1081                 {.name       = "req_buffer_history_max",
1082                  .fops       = &ptlrpc_lprocfs_req_history_max_fops,
1083                  .data       = svc},
1084                 {.name       = "timeouts",
1085                  .fops       = &ptlrpc_lprocfs_timeouts_fops,
1086                  .data       = svc},
1087                 {.name       = "nrs_policies",
1088                  .fops       = &ptlrpc_lprocfs_nrs_fops,
1089                  .data       = svc},
1090                 {NULL}
1091         };
1092         static const struct file_operations req_history_fops = {
1093                 .owner       = THIS_MODULE,
1094                 .open   = ptlrpc_lprocfs_svc_req_history_open,
1095                 .read   = seq_read,
1096                 .llseek      = seq_lseek,
1097                 .release     = lprocfs_seq_release,
1098         };
1099
1100         int rc;
1101
1102         ptlrpc_ldebugfs_register(entry, svc->srv_name,
1103                                  "stats", &svc->srv_debugfs_entry,
1104                                  &svc->srv_stats);
1105
1106         if (svc->srv_debugfs_entry == NULL)
1107                 return;
1108
1109         ldebugfs_add_vars(svc->srv_debugfs_entry, lproc_vars, NULL);
1110
1111         rc = ldebugfs_seq_create(svc->srv_debugfs_entry, "req_history",
1112                                  0400, &req_history_fops, svc);
1113         if (rc)
1114                 CWARN("Error adding the req_history file\n");
1115 }
1116
1117 void ptlrpc_lprocfs_register_obd(struct obd_device *obddev)
1118 {
1119         ptlrpc_ldebugfs_register(obddev->obd_debugfs_entry, NULL, "stats",
1120                                  &obddev->obd_svc_debugfs_entry,
1121                                  &obddev->obd_svc_stats);
1122 }
1123 EXPORT_SYMBOL(ptlrpc_lprocfs_register_obd);
1124
1125 void ptlrpc_lprocfs_rpc_sent(struct ptlrpc_request *req, long amount)
1126 {
1127         struct lprocfs_stats *svc_stats;
1128         __u32 op = lustre_msg_get_opc(req->rq_reqmsg);
1129         int opc = opcode_offset(op);
1130
1131         svc_stats = req->rq_import->imp_obd->obd_svc_stats;
1132         if (svc_stats == NULL || opc <= 0)
1133                 return;
1134         LASSERT(opc < LUSTRE_MAX_OPCODES);
1135         if (!(op == LDLM_ENQUEUE || op == MDS_REINT))
1136                 lprocfs_counter_add(svc_stats, opc + EXTRA_MAX_OPCODES, amount);
1137 }
1138
1139 void ptlrpc_lprocfs_brw(struct ptlrpc_request *req, int bytes)
1140 {
1141         struct lprocfs_stats *svc_stats;
1142         int idx;
1143
1144         if (!req->rq_import)
1145                 return;
1146         svc_stats = req->rq_import->imp_obd->obd_svc_stats;
1147         if (!svc_stats)
1148                 return;
1149         idx = lustre_msg_get_opc(req->rq_reqmsg);
1150         switch (idx) {
1151         case OST_READ:
1152                 idx = BRW_READ_BYTES + PTLRPC_LAST_CNTR;
1153                 break;
1154         case OST_WRITE:
1155                 idx = BRW_WRITE_BYTES + PTLRPC_LAST_CNTR;
1156                 break;
1157         default:
1158                 LASSERTF(0, "unsupported opcode %u\n", idx);
1159                 break;
1160         }
1161
1162         lprocfs_counter_add(svc_stats, idx, bytes);
1163 }
1164
1165 EXPORT_SYMBOL(ptlrpc_lprocfs_brw);
1166
1167 void ptlrpc_lprocfs_unregister_service(struct ptlrpc_service *svc)
1168 {
1169         if (svc->srv_debugfs_entry != NULL)
1170                 ldebugfs_remove(&svc->srv_debugfs_entry);
1171
1172         if (svc->srv_stats)
1173                 lprocfs_free_stats(&svc->srv_stats);
1174 }
1175
1176 void ptlrpc_lprocfs_unregister_obd(struct obd_device *obd)
1177 {
1178         if (!IS_ERR_OR_NULL(obd->obd_svc_debugfs_entry))
1179                 ldebugfs_remove(&obd->obd_svc_debugfs_entry);
1180
1181         if (obd->obd_svc_stats)
1182                 lprocfs_free_stats(&obd->obd_svc_stats);
1183 }
1184 EXPORT_SYMBOL(ptlrpc_lprocfs_unregister_obd);
1185
1186 #undef BUFLEN
1187
1188 int lprocfs_wr_ping(struct file *file, const char __user *buffer,
1189                     size_t count, loff_t *off)
1190 {
1191         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
1192         struct ptlrpc_request *req;
1193         int rc;
1194
1195         rc = lprocfs_climp_check(obd);
1196         if (rc)
1197                 return rc;
1198
1199         req = ptlrpc_prep_ping(obd->u.cli.cl_import);
1200         LPROCFS_CLIMP_EXIT(obd);
1201         if (req == NULL)
1202                 return -ENOMEM;
1203
1204         req->rq_send_state = LUSTRE_IMP_FULL;
1205
1206         rc = ptlrpc_queue_wait(req);
1207
1208         ptlrpc_req_finished(req);
1209         if (rc >= 0)
1210                 return count;
1211         return rc;
1212 }
1213 EXPORT_SYMBOL(lprocfs_wr_ping);
1214
1215 /* Write the connection UUID to this file to attempt to connect to that node.
1216  * The connection UUID is a node's primary NID. For example,
1217  * "echo connection=192.168.0.1@tcp0::instance > .../import".
1218  */
1219 int lprocfs_wr_import(struct file *file, const char __user *buffer,
1220                       size_t count, loff_t *off)
1221 {
1222         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
1223         struct obd_import *imp = obd->u.cli.cl_import;
1224         char *kbuf = NULL;
1225         char *uuid;
1226         char *ptr;
1227         int do_reconn = 1;
1228         const char prefix[] = "connection=";
1229         const int prefix_len = sizeof(prefix) - 1;
1230
1231         if (count > PAGE_CACHE_SIZE - 1 || count <= prefix_len)
1232                 return -EINVAL;
1233
1234         kbuf = kzalloc(count + 1, GFP_NOFS);
1235         if (!kbuf)
1236                 return -ENOMEM;
1237
1238         if (copy_from_user(kbuf, buffer, count)) {
1239                 count = -EFAULT;
1240                 goto out;
1241         }
1242
1243         kbuf[count] = 0;
1244
1245         /* only support connection=uuid::instance now */
1246         if (strncmp(prefix, kbuf, prefix_len) != 0) {
1247                 count = -EINVAL;
1248                 goto out;
1249         }
1250
1251         uuid = kbuf + prefix_len;
1252         ptr = strstr(uuid, "::");
1253         if (ptr) {
1254                 __u32 inst;
1255                 char *endptr;
1256
1257                 *ptr = 0;
1258                 do_reconn = 0;
1259                 ptr += strlen("::");
1260                 inst = simple_strtoul(ptr, &endptr, 10);
1261                 if (*endptr) {
1262                         CERROR("config: wrong instance # %s\n", ptr);
1263                 } else if (inst != imp->imp_connect_data.ocd_instance) {
1264                         CDEBUG(D_INFO, "IR: %s is connecting to an obsoleted target(%u/%u), reconnecting...\n",
1265                                imp->imp_obd->obd_name,
1266                                imp->imp_connect_data.ocd_instance, inst);
1267                         do_reconn = 1;
1268                 } else {
1269                         CDEBUG(D_INFO, "IR: %s has already been connecting to new target(%u)\n",
1270                                imp->imp_obd->obd_name, inst);
1271                 }
1272         }
1273
1274         if (do_reconn)
1275                 ptlrpc_recover_import(imp, uuid, 1);
1276
1277 out:
1278         kfree(kbuf);
1279         return count;
1280 }
1281 EXPORT_SYMBOL(lprocfs_wr_import);
1282
1283 int lprocfs_rd_pinger_recov(struct seq_file *m, void *n)
1284 {
1285         struct obd_device *obd = m->private;
1286         struct obd_import *imp = obd->u.cli.cl_import;
1287         int rc;
1288
1289         rc = lprocfs_climp_check(obd);
1290         if (rc)
1291                 return rc;
1292
1293         seq_printf(m, "%d\n", !imp->imp_no_pinger_recover);
1294         LPROCFS_CLIMP_EXIT(obd);
1295
1296         return 0;
1297 }
1298 EXPORT_SYMBOL(lprocfs_rd_pinger_recov);
1299
1300 int lprocfs_wr_pinger_recov(struct file *file, const char __user *buffer,
1301                       size_t count, loff_t *off)
1302 {
1303         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
1304         struct client_obd *cli = &obd->u.cli;
1305         struct obd_import *imp = cli->cl_import;
1306         int rc, val;
1307
1308         rc = lprocfs_write_helper(buffer, count, &val);
1309         if (rc < 0)
1310                 return rc;
1311
1312         if (val != 0 && val != 1)
1313                 return -ERANGE;
1314
1315         rc = lprocfs_climp_check(obd);
1316         if (rc)
1317                 return rc;
1318
1319         spin_lock(&imp->imp_lock);
1320         imp->imp_no_pinger_recover = !val;
1321         spin_unlock(&imp->imp_lock);
1322         LPROCFS_CLIMP_EXIT(obd);
1323
1324         return count;
1325
1326 }
1327 EXPORT_SYMBOL(lprocfs_wr_pinger_recov);