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.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2015, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  */
  32 #define DEBUG_SUBSYSTEM S_CLASS
  33
  34 #include "../include/obd_support.h"
  35 #include "../include/obd.h"
  36 #include "../include/lprocfs_status.h"
  37 #include "../include/lustre/lustre_idl.h"
  38 #include "../include/lustre_net.h"
  39 #include "../include/obd_class.h"
  40 #include "ptlrpc_internal.h"
  41
  42 static struct ll_rpc_opcode {
  43         __u32       opcode;
  44         const char *opname;
  45 } ll_rpc_opcode_table[LUSTRE_MAX_OPCODES] = {
  46         { OST_REPLY,    "ost_reply" },
  47         { OST_GETATTR,      "ost_getattr" },
  48         { OST_SETATTR,      "ost_setattr" },
  49         { OST_READ,      "ost_read" },
  50         { OST_WRITE,    "ost_write" },
  51         { OST_CREATE,       "ost_create" },
  52         { OST_DESTROY,      "ost_destroy" },
  53         { OST_GET_INFO,     "ost_get_info" },
  54         { OST_CONNECT,      "ost_connect" },
  55         { OST_DISCONNECT,   "ost_disconnect" },
  56         { OST_PUNCH,    "ost_punch" },
  57         { OST_OPEN,      "ost_open" },
  58         { OST_CLOSE,    "ost_close" },
  59         { OST_STATFS,       "ost_statfs" },
  60         { 14,           NULL },    /* formerly OST_SAN_READ */
  61         { 15,           NULL },    /* formerly OST_SAN_WRITE */
  62         { OST_SYNC,      "ost_sync" },
  63         { OST_SET_INFO,     "ost_set_info" },
  64         { OST_QUOTACHECK,   "ost_quotacheck" },
  65         { OST_QUOTACTL,     "ost_quotactl" },
  66         { OST_QUOTA_ADJUST_QUNIT, "ost_quota_adjust_qunit" },
  67         { MDS_GETATTR,      "mds_getattr" },
  68         { MDS_GETATTR_NAME, "mds_getattr_lock" },
  69         { MDS_CLOSE,    "mds_close" },
  70         { MDS_REINT,    "mds_reint" },
  71         { MDS_READPAGE,     "mds_readpage" },
  72         { MDS_CONNECT,      "mds_connect" },
  73         { MDS_DISCONNECT,   "mds_disconnect" },
  74         { MDS_GETSTATUS,    "mds_getstatus" },
  75         { MDS_STATFS,       "mds_statfs" },
  76         { MDS_PIN,        "mds_pin" },
  77         { MDS_UNPIN,    "mds_unpin" },
  78         { MDS_SYNC,      "mds_sync" },
  79         { MDS_DONE_WRITING, "mds_done_writing" },
  80         { MDS_SET_INFO,     "mds_set_info" },
  81         { MDS_QUOTACHECK,   "mds_quotacheck" },
  82         { MDS_QUOTACTL,     "mds_quotactl" },
  83         { MDS_GETXATTR,     "mds_getxattr" },
  84         { MDS_SETXATTR,     "mds_setxattr" },
  85         { MDS_WRITEPAGE,    "mds_writepage" },
  86         { MDS_IS_SUBDIR,    "mds_is_subdir" },
  87         { MDS_GET_INFO,     "mds_get_info" },
  88         { MDS_HSM_STATE_GET, "mds_hsm_state_get" },
  89         { MDS_HSM_STATE_SET, "mds_hsm_state_set" },
  90         { MDS_HSM_ACTION,   "mds_hsm_action" },
  91         { MDS_HSM_PROGRESS, "mds_hsm_progress" },
  92         { MDS_HSM_REQUEST,  "mds_hsm_request" },
  93         { MDS_HSM_CT_REGISTER, "mds_hsm_ct_register" },
  94         { MDS_HSM_CT_UNREGISTER, "mds_hsm_ct_unregister" },
  95         { MDS_SWAP_LAYOUTS,     "mds_swap_layouts" },
  96         { LDLM_ENQUEUE,     "ldlm_enqueue" },
  97         { LDLM_CONVERT,     "ldlm_convert" },
  98         { LDLM_CANCEL,      "ldlm_cancel" },
  99         { LDLM_BL_CALLBACK, "ldlm_bl_callback" },
 100         { LDLM_CP_CALLBACK, "ldlm_cp_callback" },
 101         { LDLM_GL_CALLBACK, "ldlm_gl_callback" },
 102         { LDLM_SET_INFO,    "ldlm_set_info" },
 103         { MGS_CONNECT,      "mgs_connect" },
 104         { MGS_DISCONNECT,   "mgs_disconnect" },
 105         { MGS_EXCEPTION,    "mgs_exception" },
 106         { MGS_TARGET_REG,   "mgs_target_reg" },
 107         { MGS_TARGET_DEL,   "mgs_target_del" },
 108         { MGS_SET_INFO,     "mgs_set_info" },
 109         { MGS_CONFIG_READ,  "mgs_config_read" },
 110         { OBD_PING,      "obd_ping" },
 111         { OBD_LOG_CANCEL,       "llog_cancel" },
 112         { OBD_QC_CALLBACK,  "obd_quota_callback" },
 113         { OBD_IDX_READ,     "dt_index_read" },
 114         { LLOG_ORIGIN_HANDLE_CREATE,     "llog_origin_handle_open" },
 115         { LLOG_ORIGIN_HANDLE_NEXT_BLOCK, "llog_origin_handle_next_block" },
 116         { LLOG_ORIGIN_HANDLE_READ_HEADER, "llog_origin_handle_read_header" },
 117         { LLOG_ORIGIN_HANDLE_WRITE_REC,  "llog_origin_handle_write_rec" },
 118         { LLOG_ORIGIN_HANDLE_CLOSE,      "llog_origin_handle_close" },
 119         { LLOG_ORIGIN_CONNECT,     "llog_origin_connect" },
 120         { LLOG_CATINFO,           "llog_catinfo" },
 121         { LLOG_ORIGIN_HANDLE_PREV_BLOCK, "llog_origin_handle_prev_block" },
 122         { LLOG_ORIGIN_HANDLE_DESTROY,    "llog_origin_handle_destroy" },
 123         { QUOTA_DQACQ,      "quota_acquire" },
 124         { QUOTA_DQREL,      "quota_release" },
 125         { SEQ_QUERY,    "seq_query" },
 126         { SEC_CTX_INIT,     "sec_ctx_init" },
 127         { SEC_CTX_INIT_CONT, "sec_ctx_init_cont" },
 128         { SEC_CTX_FINI,     "sec_ctx_fini" },
 129         { FLD_QUERY,    "fld_query" },
 130         { FLD_READ,     "fld_read" },
 131 };
 132
 133 static struct ll_eopcode {
 134         __u32       opcode;
 135         const char *opname;
 136 } ll_eopcode_table[EXTRA_LAST_OPC] = {
 137         { LDLM_GLIMPSE_ENQUEUE, "ldlm_glimpse_enqueue" },
 138         { LDLM_PLAIN_ENQUEUE,   "ldlm_plain_enqueue" },
 139         { LDLM_EXTENT_ENQUEUE,  "ldlm_extent_enqueue" },
 140         { LDLM_FLOCK_ENQUEUE,   "ldlm_flock_enqueue" },
 141         { LDLM_IBITS_ENQUEUE,   "ldlm_ibits_enqueue" },
 142         { MDS_REINT_SETATTR,    "mds_reint_setattr" },
 143         { MDS_REINT_CREATE,     "mds_reint_create" },
 144         { MDS_REINT_LINK,       "mds_reint_link" },
 145         { MDS_REINT_UNLINK,     "mds_reint_unlink" },
 146         { MDS_REINT_RENAME,     "mds_reint_rename" },
 147         { MDS_REINT_OPEN,       "mds_reint_open" },
 148         { MDS_REINT_SETXATTR,   "mds_reint_setxattr" },
 149         { BRW_READ_BYTES,       "read_bytes" },
 150         { BRW_WRITE_BYTES,      "write_bytes" },
 151 };
 152
 153 const char *ll_opcode2str(__u32 opcode)
 154 {
 155         /* When one of the assertions below fail, chances are that:
 156          *     1) A new opcode was added in include/lustre/lustre_idl.h,
 157          *      but is missing from the table above.
 158          * or  2) The opcode space was renumbered or rearranged,
 159          *      and the opcode_offset() function in
 160          *      ptlrpc_internal.h needs to be modified.
 161          */
 162         __u32 offset = opcode_offset(opcode);
 163
 164         LASSERTF(offset < LUSTRE_MAX_OPCODES,
 165                  "offset %u >= LUSTRE_MAX_OPCODES %u\n",
 166                  offset, LUSTRE_MAX_OPCODES);
 167         LASSERTF(ll_rpc_opcode_table[offset].opcode == opcode,
 168                  "ll_rpc_opcode_table[%u].opcode %u != opcode %u\n",
 169                  offset, ll_rpc_opcode_table[offset].opcode, opcode);
 170         return ll_rpc_opcode_table[offset].opname;
 171 }
 172
 173 static const char *ll_eopcode2str(__u32 opcode)
 174 {
 175         LASSERT(ll_eopcode_table[opcode].opcode == opcode);
 176         return ll_eopcode_table[opcode].opname;
 177 }
 178
 179 static void
 180 ptlrpc_ldebugfs_register(struct dentry *root, char *dir,
 181                          char *name,
 182                          struct dentry **debugfs_root_ret,
 183                          struct lprocfs_stats **stats_ret)
 184 {
 185         struct dentry *svc_debugfs_entry;
 186         struct lprocfs_stats *svc_stats;
 187         int i, rc;
 188         unsigned int svc_counter_config = LPROCFS_CNTR_AVGMINMAX |
 189                                           LPROCFS_CNTR_STDDEV;
 190
 191         LASSERT(!*debugfs_root_ret);
 192         LASSERT(!*stats_ret);
 193
 194         svc_stats = lprocfs_alloc_stats(EXTRA_MAX_OPCODES + LUSTRE_MAX_OPCODES,
 195                                         0);
 196         if (!svc_stats)
 197                 return;
 198
 199         if (dir) {
 200                 svc_debugfs_entry = ldebugfs_register(dir, root, NULL, NULL);
 201                 if (IS_ERR(svc_debugfs_entry)) {
 202                         lprocfs_free_stats(&svc_stats);
 203                         return;
 204                 }
 205         } else {
 206                 svc_debugfs_entry = root;
 207         }
 208
 209         lprocfs_counter_init(svc_stats, PTLRPC_REQWAIT_CNTR,
 210                              svc_counter_config, "req_waittime", "usec");
 211         lprocfs_counter_init(svc_stats, PTLRPC_REQQDEPTH_CNTR,
 212                              svc_counter_config, "req_qdepth", "reqs");
 213         lprocfs_counter_init(svc_stats, PTLRPC_REQACTIVE_CNTR,
 214                              svc_counter_config, "req_active", "reqs");
 215         lprocfs_counter_init(svc_stats, PTLRPC_TIMEOUT,
 216                              svc_counter_config, "req_timeout", "sec");
 217         lprocfs_counter_init(svc_stats, PTLRPC_REQBUF_AVAIL_CNTR,
 218                              svc_counter_config, "reqbuf_avail", "bufs");
 219         for (i = 0; i < EXTRA_LAST_OPC; i++) {
 220                 char *units;
 221
 222                 switch (i) {
 223                 case BRW_WRITE_BYTES:
 224                 case BRW_READ_BYTES:
 225                         units = "bytes";
 226                         break;
 227                 default:
 228                         units = "reqs";
 229                         break;
 230                 }
 231                 lprocfs_counter_init(svc_stats, PTLRPC_LAST_CNTR + i,
 232                                      svc_counter_config,
 233                                      ll_eopcode2str(i), units);
 234         }
 235         for (i = 0; i < LUSTRE_MAX_OPCODES; i++) {
 236                 __u32 opcode = ll_rpc_opcode_table[i].opcode;
 237
 238                 lprocfs_counter_init(svc_stats,
 239                                      EXTRA_MAX_OPCODES + i, svc_counter_config,
 240                                      ll_opcode2str(opcode), "usec");
 241         }
 242
 243         rc = ldebugfs_register_stats(svc_debugfs_entry, name, svc_stats);
 244         if (rc < 0) {
 245                 if (dir)
 246                         ldebugfs_remove(&svc_debugfs_entry);
 247                 lprocfs_free_stats(&svc_stats);
 248         } else {
 249                 if (dir)
 250                         *debugfs_root_ret = svc_debugfs_entry;
 251                 *stats_ret = svc_stats;
 252         }
 253 }
 254
 255 static int
 256 ptlrpc_lprocfs_req_history_len_seq_show(struct seq_file *m, void *v)
 257 {
 258         struct ptlrpc_service *svc = m->private;
 259         struct ptlrpc_service_part *svcpt;
 260         int total = 0;
 261         int i;
 262
 263         ptlrpc_service_for_each_part(svcpt, i, svc)
 264                 total += svcpt->scp_hist_nrqbds;
 265
 266         seq_printf(m, "%d\n", total);
 267         return 0;
 268 }
 269
 270 LPROC_SEQ_FOPS_RO(ptlrpc_lprocfs_req_history_len);
 271
 272 static int
 273 ptlrpc_lprocfs_req_history_max_seq_show(struct seq_file *m, void *n)
 274 {
 275         struct ptlrpc_service *svc = m->private;
 276         struct ptlrpc_service_part *svcpt;
 277         int total = 0;
 278         int i;
 279
 280         ptlrpc_service_for_each_part(svcpt, i, svc)
 281                 total += svc->srv_hist_nrqbds_cpt_max;
 282
 283         seq_printf(m, "%d\n", total);
 284         return 0;
 285 }
 286
 287 static ssize_t
 288 ptlrpc_lprocfs_req_history_max_seq_write(struct file *file,
 289                                          const char __user *buffer,
 290                                          size_t count, loff_t *off)
 291 {
 292         struct ptlrpc_service *svc = ((struct seq_file *)file->private_data)->private;
 293         int bufpages;
 294         int val;
 295         int rc;
 296
 297         rc = lprocfs_write_helper(buffer, count, &val);
 298         if (rc < 0)
 299                 return rc;
 300
 301         if (val < 0)
 302                 return -ERANGE;
 303
 304         /* This sanity check is more of an insanity check; we can still
 305          * hose a kernel by allowing the request history to grow too
 306          * far.
 307          */
 308         bufpages = (svc->srv_buf_size + PAGE_SIZE - 1) >> PAGE_SHIFT;
 309         if (val > totalram_pages / (2 * bufpages))
 310                 return -ERANGE;
 311
 312         spin_lock(&svc->srv_lock);
 313
 314         if (val == 0)
 315                 svc->srv_hist_nrqbds_cpt_max = 0;
 316         else
 317                 svc->srv_hist_nrqbds_cpt_max = max(1, (val / svc->srv_ncpts));
 318
 319         spin_unlock(&svc->srv_lock);
 320
 321         return count;
 322 }
 323
 324 LPROC_SEQ_FOPS(ptlrpc_lprocfs_req_history_max);
 325
 326 static ssize_t threads_min_show(struct kobject *kobj, struct attribute *attr,
 327                                 char *buf)
 328 {
 329         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
 330                                                   srv_kobj);
 331
 332         return sprintf(buf, "%d\n", svc->srv_nthrs_cpt_init * svc->srv_ncpts);
 333 }
 334
 335 static ssize_t threads_min_store(struct kobject *kobj, struct attribute *attr,
 336                                  const char *buffer, size_t count)
 337 {
 338         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
 339                                                   srv_kobj);
 340         unsigned long val;
 341         int rc = kstrtoul(buffer, 10, &val);
 342
 343         if (rc < 0)
 344                 return rc;
 345
 346         if (val / svc->srv_ncpts < PTLRPC_NTHRS_INIT)
 347                 return -ERANGE;
 348
 349         spin_lock(&svc->srv_lock);
 350         if (val > svc->srv_nthrs_cpt_limit * svc->srv_ncpts) {
 351                 spin_unlock(&svc->srv_lock);
 352                 return -ERANGE;
 353         }
 354
 355         svc->srv_nthrs_cpt_init = val / svc->srv_ncpts;
 356
 357         spin_unlock(&svc->srv_lock);
 358
 359         return count;
 360 }
 361 LUSTRE_RW_ATTR(threads_min);
 362
 363 static ssize_t threads_started_show(struct kobject *kobj,
 364                                     struct attribute *attr,
 365                                     char *buf)
 366 {
 367         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
 368                                                   srv_kobj);
 369         struct ptlrpc_service_part *svcpt;
 370         int total = 0;
 371         int i;
 372
 373         ptlrpc_service_for_each_part(svcpt, i, svc)
 374                 total += svcpt->scp_nthrs_running;
 375
 376         return sprintf(buf, "%d\n", total);
 377 }
 378 LUSTRE_RO_ATTR(threads_started);
 379
 380 static ssize_t threads_max_show(struct kobject *kobj, struct attribute *attr,
 381                                 char *buf)
 382 {
 383         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
 384                                                   srv_kobj);
 385
 386         return sprintf(buf, "%d\n", svc->srv_nthrs_cpt_limit * svc->srv_ncpts);
 387 }
 388
 389 static ssize_t threads_max_store(struct kobject *kobj, struct attribute *attr,
 390                                  const char *buffer, size_t count)
 391 {
 392         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
 393                                                   srv_kobj);
 394         unsigned long val;
 395         int rc = kstrtoul(buffer, 10, &val);
 396
 397         if (rc < 0)
 398                 return rc;
 399
 400         if (val / svc->srv_ncpts < PTLRPC_NTHRS_INIT)
 401                 return -ERANGE;
 402
 403         spin_lock(&svc->srv_lock);
 404         if (val < svc->srv_nthrs_cpt_init * svc->srv_ncpts) {
 405                 spin_unlock(&svc->srv_lock);
 406                 return -ERANGE;
 407         }
 408
 409         svc->srv_nthrs_cpt_limit = val / svc->srv_ncpts;
 410
 411         spin_unlock(&svc->srv_lock);
 412
 413         return count;
 414 }
 415 LUSTRE_RW_ATTR(threads_max);
 416
 417 /**
 418  * \addtogoup nrs
 419  * @{
 420  */
 421
 422 /**
 423  * Translates \e ptlrpc_nrs_pol_state values to human-readable strings.
 424  *
 425  * \param[in] state The policy state
 426  */
 427 static const char *nrs_state2str(enum ptlrpc_nrs_pol_state state)
 428 {
 429         switch (state) {
 430         default:
 431                 LBUG();
 432         case NRS_POL_STATE_INVALID:
 433                 return "invalid";
 434         case NRS_POL_STATE_STOPPED:
 435                 return "stopped";
 436         case NRS_POL_STATE_STOPPING:
 437                 return "stopping";
 438         case NRS_POL_STATE_STARTING:
 439                 return "starting";
 440         case NRS_POL_STATE_STARTED:
 441                 return "started";
 442         }
 443 }
 444
 445 /**
 446  * Obtains status information for \a policy.
 447  *
 448  * Information is copied in \a info.
 449  *
 450  * \param[in] policy The policy
 451  * \param[out] info  Holds returned status information
 452  */
 453 static void nrs_policy_get_info_locked(struct ptlrpc_nrs_policy *policy,
 454                                        struct ptlrpc_nrs_pol_info *info)
 455 {
 456         assert_spin_locked(&policy->pol_nrs->nrs_lock);
 457
 458         memcpy(info->pi_name, policy->pol_desc->pd_name, NRS_POL_NAME_MAX);
 459
 460         info->pi_fallback    = !!(policy->pol_flags & PTLRPC_NRS_FL_FALLBACK);
 461         info->pi_state       = policy->pol_state;
 462         /**
 463          * XXX: These are accessed without holding
 464          * ptlrpc_service_part::scp_req_lock.
 465          */
 466         info->pi_req_queued  = policy->pol_req_queued;
 467         info->pi_req_started = policy->pol_req_started;
 468 }
 469
 470 /**
 471  * Reads and prints policy status information for all policies of a PTLRPC
 472  * service.
 473  */
 474 static int ptlrpc_lprocfs_nrs_seq_show(struct seq_file *m, void *n)
 475 {
 476         struct ptlrpc_service *svc = m->private;
 477         struct ptlrpc_service_part *svcpt;
 478         struct ptlrpc_nrs *nrs;
 479         struct ptlrpc_nrs_policy *policy;
 480         struct ptlrpc_nrs_pol_info *infos;
 481         struct ptlrpc_nrs_pol_info tmp;
 482         unsigned num_pols;
 483         unsigned pol_idx = 0;
 484         bool hp = false;
 485         int i;
 486         int rc = 0;
 487
 488         /**
 489          * Serialize NRS core lprocfs operations with policy registration/
 490          * unregistration.
 491          */
 492         mutex_lock(&nrs_core.nrs_mutex);
 493
 494         /**
 495          * Use the first service partition's regular NRS head in order to obtain
 496          * the number of policies registered with NRS heads of this service. All
 497          * service partitions will have the same number of policies.
 498          */
 499         nrs = nrs_svcpt2nrs(svc->srv_parts[0], false);
 500
 501         spin_lock(&nrs->nrs_lock);
 502         num_pols = svc->srv_parts[0]->scp_nrs_reg.nrs_num_pols;
 503         spin_unlock(&nrs->nrs_lock);
 504
 505         infos = kcalloc(num_pols, sizeof(*infos), GFP_NOFS);
 506         if (!infos) {
 507                 rc = -ENOMEM;
 508                 goto unlock;
 509         }
 510 again:
 511
 512         ptlrpc_service_for_each_part(svcpt, i, svc) {
 513                 nrs = nrs_svcpt2nrs(svcpt, hp);
 514                 spin_lock(&nrs->nrs_lock);
 515
 516                 pol_idx = 0;
 517
 518                 list_for_each_entry(policy, &nrs->nrs_policy_list, pol_list) {
 519                         LASSERT(pol_idx < num_pols);
 520
 521                         nrs_policy_get_info_locked(policy, &tmp);
 522                         /**
 523                          * Copy values when handling the first service
 524                          * partition.
 525                          */
 526                         if (i == 0) {
 527                                 memcpy(infos[pol_idx].pi_name, tmp.pi_name,
 528                                        NRS_POL_NAME_MAX);
 529                                 memcpy(&infos[pol_idx].pi_state, &tmp.pi_state,
 530                                        sizeof(tmp.pi_state));
 531                                 infos[pol_idx].pi_fallback = tmp.pi_fallback;
 532                                 /**
 533                                  * For the rest of the service partitions
 534                                  * sanity-check the values we get.
 535                                  */
 536                         } else {
 537                                 LASSERT(strncmp(infos[pol_idx].pi_name,
 538                                                 tmp.pi_name,
 539                                                 NRS_POL_NAME_MAX) == 0);
 540                                 /**
 541                                  * Not asserting ptlrpc_nrs_pol_info::pi_state,
 542                                  * because it may be different between
 543                                  * instances of the same policy in different
 544                                  * service partitions.
 545                                  */
 546                                 LASSERT(infos[pol_idx].pi_fallback ==
 547                                         tmp.pi_fallback);
 548                         }
 549
 550                         infos[pol_idx].pi_req_queued += tmp.pi_req_queued;
 551                         infos[pol_idx].pi_req_started += tmp.pi_req_started;
 552
 553                         pol_idx++;
 554                 }
 555                 spin_unlock(&nrs->nrs_lock);
 556         }
 557
 558         /**
 559          * Policy status information output is in YAML format.
 560          * For example:
 561          *
 562          *      regular_requests:
 563          *        - name: fifo
 564          *          state: started
 565          *          fallback: yes
 566          *          queued: 0
 567          *          active: 0
 568          *
 569          *        - name: crrn
 570          *          state: started
 571          *          fallback: no
 572          *          queued: 2015
 573          *          active: 384
 574          *
 575          *      high_priority_requests:
 576          *        - name: fifo
 577          *          state: started
 578          *          fallback: yes
 579          *          queued: 0
 580          *          active: 2
 581          *
 582          *        - name: crrn
 583          *          state: stopped
 584          *          fallback: no
 585          *          queued: 0
 586          *          active: 0
 587          */
 588         seq_printf(m, "%s\n",
 589                    !hp ?  "\nregular_requests:" : "high_priority_requests:");
 590
 591         for (pol_idx = 0; pol_idx < num_pols; pol_idx++) {
 592                 seq_printf(m,  "  - name: %s\n"
 593                                "    state: %s\n"
 594                                "    fallback: %s\n"
 595                                "    queued: %-20d\n"
 596                                "    active: %-20d\n\n",
 597                                infos[pol_idx].pi_name,
 598                                nrs_state2str(infos[pol_idx].pi_state),
 599                                infos[pol_idx].pi_fallback ? "yes" : "no",
 600                                (int)infos[pol_idx].pi_req_queued,
 601                                (int)infos[pol_idx].pi_req_started);
 602         }
 603
 604         if (!hp && nrs_svc_has_hp(svc)) {
 605                 memset(infos, 0, num_pols * sizeof(*infos));
 606
 607                 /**
 608                  * Redo the processing for the service's HP NRS heads' policies.
 609                  */
 610                 hp = true;
 611                 goto again;
 612         }
 613
 614         kfree(infos);
 615 unlock:
 616         mutex_unlock(&nrs_core.nrs_mutex);
 617
 618         return rc;
 619 }
 620
 621 /**
 622  * The longest valid command string is the maximum policy name size, plus the
 623  * length of the " reg" substring
 624  */
 625 #define LPROCFS_NRS_WR_MAX_CMD  (NRS_POL_NAME_MAX + sizeof(" reg") - 1)
 626
 627 /**
 628  * Starts and stops a given policy on a PTLRPC service.
 629  *
 630  * Commands consist of the policy name, followed by an optional [reg|hp] token;
 631  * if the optional token is omitted, the operation is performed on both the
 632  * regular and high-priority (if the service has one) NRS head.
 633  */
 634 static ssize_t ptlrpc_lprocfs_nrs_seq_write(struct file *file,
 635                                             const char __user *buffer,
 636                                             size_t count, loff_t *off)
 637 {
 638         struct ptlrpc_service *svc = ((struct seq_file *)file->private_data)->private;
 639         enum ptlrpc_nrs_queue_type queue = PTLRPC_NRS_QUEUE_BOTH;
 640         char *cmd;
 641         char *cmd_copy = NULL;
 642         char *token;
 643         int rc = 0;
 644
 645         if (count >= LPROCFS_NRS_WR_MAX_CMD)
 646                 return -EINVAL;
 647
 648         cmd = kzalloc(LPROCFS_NRS_WR_MAX_CMD, GFP_NOFS);
 649         if (!cmd)
 650                 return -ENOMEM;
 651         /**
 652          * strsep() modifies its argument, so keep a copy
 653          */
 654         cmd_copy = cmd;
 655
 656         if (copy_from_user(cmd, buffer, count)) {
 657                 rc = -EFAULT;
 658                 goto out;
 659         }
 660
 661         cmd[count] = '\0';
 662
 663         token = strsep(&cmd, " ");
 664
 665         if (strlen(token) > NRS_POL_NAME_MAX - 1) {
 666                 rc = -EINVAL;
 667                 goto out;
 668         }
 669
 670         /**
 671          * No [reg|hp] token has been specified
 672          */
 673         if (!cmd)
 674                 goto default_queue;
 675
 676         /**
 677          * The second token is either NULL, or an optional [reg|hp] string
 678          */
 679         if (strcmp(cmd, "reg") == 0) {
 680                 queue = PTLRPC_NRS_QUEUE_REG;
 681         } else if (strcmp(cmd, "hp") == 0) {
 682                 queue = PTLRPC_NRS_QUEUE_HP;
 683         } else {
 684                 rc = -EINVAL;
 685                 goto out;
 686         }
 687
 688 default_queue:
 689
 690         if (queue == PTLRPC_NRS_QUEUE_HP && !nrs_svc_has_hp(svc)) {
 691                 rc = -ENODEV;
 692                 goto out;
 693         } else if (queue == PTLRPC_NRS_QUEUE_BOTH && !nrs_svc_has_hp(svc)) {
 694                 queue = PTLRPC_NRS_QUEUE_REG;
 695         }
 696
 697         /**
 698          * Serialize NRS core lprocfs operations with policy registration/
 699          * unregistration.
 700          */
 701         mutex_lock(&nrs_core.nrs_mutex);
 702
 703         rc = ptlrpc_nrs_policy_control(svc, queue, token, PTLRPC_NRS_CTL_START,
 704                                        false, NULL);
 705
 706         mutex_unlock(&nrs_core.nrs_mutex);
 707 out:
 708         kfree(cmd_copy);
 709
 710         return rc < 0 ? rc : count;
 711 }
 712
 713 LPROC_SEQ_FOPS(ptlrpc_lprocfs_nrs);
 714
 715 /** @} nrs */
 716
 717 struct ptlrpc_srh_iterator {
 718         int                     srhi_idx;
 719         __u64                   srhi_seq;
 720         struct ptlrpc_request   *srhi_req;
 721 };
 722
 723 static int
 724 ptlrpc_lprocfs_svc_req_history_seek(struct ptlrpc_service_part *svcpt,
 725                                     struct ptlrpc_srh_iterator *srhi,
 726                                     __u64 seq)
 727 {
 728         struct list_head *e;
 729         struct ptlrpc_request *req;
 730
 731         if (srhi->srhi_req && srhi->srhi_seq > svcpt->scp_hist_seq_culled &&
 732             srhi->srhi_seq <= seq) {
 733                 /* If srhi_req was set previously, hasn't been culled and
 734                  * we're searching for a seq on or after it (i.e. more
 735                  * recent), search from it onwards.
 736                  * Since the service history is LRU (i.e. culled reqs will
 737                  * be near the head), we shouldn't have to do long
 738                  * re-scans
 739                  */
 740                 LASSERTF(srhi->srhi_seq == srhi->srhi_req->rq_history_seq,
 741                          "%s:%d: seek seq %llu, request seq %llu\n",
 742                          svcpt->scp_service->srv_name, svcpt->scp_cpt,
 743                          srhi->srhi_seq, srhi->srhi_req->rq_history_seq);
 744                 LASSERTF(!list_empty(&svcpt->scp_hist_reqs),
 745                          "%s:%d: seek offset %llu, request seq %llu, last culled %llu\n",
 746                          svcpt->scp_service->srv_name, svcpt->scp_cpt,
 747                          seq, srhi->srhi_seq, svcpt->scp_hist_seq_culled);
 748                 e = &srhi->srhi_req->rq_history_list;
 749         } else {
 750                 /* search from start */
 751                 e = svcpt->scp_hist_reqs.next;
 752         }
 753
 754         while (e != &svcpt->scp_hist_reqs) {
 755                 req = list_entry(e, struct ptlrpc_request, rq_history_list);
 756
 757                 if (req->rq_history_seq >= seq) {
 758                         srhi->srhi_seq = req->rq_history_seq;
 759                         srhi->srhi_req = req;
 760                         return 0;
 761                 }
 762                 e = e->next;
 763         }
 764
 765         return -ENOENT;
 766 }
 767
 768 /*
 769  * ptlrpc history sequence is used as "position" of seq_file, in some case,
 770  * seq_read() will increase "position" to indicate reading the next
 771  * element, however, low bits of history sequence are reserved for CPT id
 772  * (check the details from comments before ptlrpc_req_add_history), which
 773  * means seq_read() might change CPT id of history sequence and never
 774  * finish reading of requests on a CPT. To make it work, we have to shift
 775  * CPT id to high bits and timestamp to low bits, so seq_read() will only
 776  * increase timestamp which can correctly indicate the next position.
 777  */
 778
 779 /* convert seq_file pos to cpt */
 780 #define PTLRPC_REQ_POS2CPT(svc, pos)                    \
 781         ((svc)->srv_cpt_bits == 0 ? 0 :                 \
 782          (__u64)(pos) >> (64 - (svc)->srv_cpt_bits))
 783
 784 /* make up seq_file pos from cpt */
 785 #define PTLRPC_REQ_CPT2POS(svc, cpt)                    \
 786         ((svc)->srv_cpt_bits == 0 ? 0 :                 \
 787          (cpt) << (64 - (svc)->srv_cpt_bits))
 788
 789 /* convert sequence to position */
 790 #define PTLRPC_REQ_SEQ2POS(svc, seq)                    \
 791         ((svc)->srv_cpt_bits == 0 ? (seq) :             \
 792          ((seq) >> (svc)->srv_cpt_bits) |               \
 793          ((seq) << (64 - (svc)->srv_cpt_bits)))
 794
 795 /* convert position to sequence */
 796 #define PTLRPC_REQ_POS2SEQ(svc, pos)                    \
 797         ((svc)->srv_cpt_bits == 0 ? (pos) :             \
 798          ((__u64)(pos) << (svc)->srv_cpt_bits) |        \
 799          ((__u64)(pos) >> (64 - (svc)->srv_cpt_bits)))
 800
 801 static void *
 802 ptlrpc_lprocfs_svc_req_history_start(struct seq_file *s, loff_t *pos)
 803 {
 804         struct ptlrpc_service           *svc = s->private;
 805         struct ptlrpc_service_part      *svcpt;
 806         struct ptlrpc_srh_iterator      *srhi;
 807         unsigned int                    cpt;
 808         int                             rc;
 809         int                             i;
 810
 811         if (sizeof(loff_t) != sizeof(__u64)) { /* can't support */
 812                 CWARN("Failed to read request history because size of loff_t %d can't match size of u64\n",
 813                       (int)sizeof(loff_t));
 814                 return NULL;
 815         }
 816
 817         srhi = kzalloc(sizeof(*srhi), GFP_NOFS);
 818         if (!srhi)
 819                 return NULL;
 820
 821         srhi->srhi_seq = 0;
 822         srhi->srhi_req = NULL;
 823
 824         cpt = PTLRPC_REQ_POS2CPT(svc, *pos);
 825
 826         ptlrpc_service_for_each_part(svcpt, i, svc) {
 827                 if (i < cpt) /* skip */
 828                         continue;
 829                 if (i > cpt) /* make up the lowest position for this CPT */
 830                         *pos = PTLRPC_REQ_CPT2POS(svc, i);
 831
 832                 spin_lock(&svcpt->scp_lock);
 833                 rc = ptlrpc_lprocfs_svc_req_history_seek(svcpt, srhi,
 834                                 PTLRPC_REQ_POS2SEQ(svc, *pos));
 835                 spin_unlock(&svcpt->scp_lock);
 836                 if (rc == 0) {
 837                         *pos = PTLRPC_REQ_SEQ2POS(svc, srhi->srhi_seq);
 838                         srhi->srhi_idx = i;
 839                         return srhi;
 840                 }
 841         }
 842
 843         kfree(srhi);
 844         return NULL;
 845 }
 846
 847 static void
 848 ptlrpc_lprocfs_svc_req_history_stop(struct seq_file *s, void *iter)
 849 {
 850         struct ptlrpc_srh_iterator *srhi = iter;
 851
 852         kfree(srhi);
 853 }
 854
 855 static void *
 856 ptlrpc_lprocfs_svc_req_history_next(struct seq_file *s,
 857                                     void *iter, loff_t *pos)
 858 {
 859         struct ptlrpc_service *svc = s->private;
 860         struct ptlrpc_srh_iterator *srhi = iter;
 861         struct ptlrpc_service_part *svcpt;
 862         __u64 seq;
 863         int rc;
 864         int i;
 865
 866         for (i = srhi->srhi_idx; i < svc->srv_ncpts; i++) {
 867                 svcpt = svc->srv_parts[i];
 868
 869                 if (i > srhi->srhi_idx) { /* reset iterator for a new CPT */
 870                         srhi->srhi_req = NULL;
 871                         seq = 0;
 872                         srhi->srhi_seq = 0;
 873                 } else { /* the next sequence */
 874                         seq = srhi->srhi_seq + (1 << svc->srv_cpt_bits);
 875                 }
 876
 877                 spin_lock(&svcpt->scp_lock);
 878                 rc = ptlrpc_lprocfs_svc_req_history_seek(svcpt, srhi, seq);
 879                 spin_unlock(&svcpt->scp_lock);
 880                 if (rc == 0) {
 881                         *pos = PTLRPC_REQ_SEQ2POS(svc, srhi->srhi_seq);
 882                         srhi->srhi_idx = i;
 883                         return srhi;
 884                 }
 885         }
 886
 887         kfree(srhi);
 888         return NULL;
 889 }
 890
 891 static int ptlrpc_lprocfs_svc_req_history_show(struct seq_file *s, void *iter)
 892 {
 893         struct ptlrpc_service *svc = s->private;
 894         struct ptlrpc_srh_iterator *srhi = iter;
 895         struct ptlrpc_service_part *svcpt;
 896         struct ptlrpc_request *req;
 897         int rc;
 898
 899         LASSERT(srhi->srhi_idx < svc->srv_ncpts);
 900
 901         svcpt = svc->srv_parts[srhi->srhi_idx];
 902
 903         spin_lock(&svcpt->scp_lock);
 904
 905         rc = ptlrpc_lprocfs_svc_req_history_seek(svcpt, srhi, srhi->srhi_seq);
 906
 907         if (rc == 0) {
 908                 char nidstr[LNET_NIDSTR_SIZE];
 909
 910                 req = srhi->srhi_req;
 911
 912                 libcfs_nid2str_r(req->rq_self, nidstr, sizeof(nidstr));
 913                 /* Print common req fields.
 914                  * CAVEAT EMPTOR: we're racing with the service handler
 915                  * here.  The request could contain any old crap, so you
 916                  * must be just as careful as the service's request
 917                  * parser. Currently I only print stuff here I know is OK
 918                  * to look at coz it was set up in request_in_callback()!!!
 919                  */
 920                 seq_printf(s, "%lld:%s:%s:x%llu:%d:%s:%lld:%lds(%+lds) ",
 921                            req->rq_history_seq, nidstr,
 922                            libcfs_id2str(req->rq_peer), req->rq_xid,
 923                            req->rq_reqlen, ptlrpc_rqphase2str(req),
 924                            (s64)req->rq_arrival_time.tv_sec,
 925                            (long)(req->rq_sent - req->rq_arrival_time.tv_sec),
 926                            (long)(req->rq_sent - req->rq_deadline));
 927                 if (!svc->srv_ops.so_req_printer)
 928                         seq_putc(s, '\n');
 929                 else
 930                         svc->srv_ops.so_req_printer(s, srhi->srhi_req);
 931         }
 932
 933         spin_unlock(&svcpt->scp_lock);
 934         return rc;
 935 }
 936
 937 static int
 938 ptlrpc_lprocfs_svc_req_history_open(struct inode *inode, struct file *file)
 939 {
 940         static const struct seq_operations sops = {
 941                 .start = ptlrpc_lprocfs_svc_req_history_start,
 942                 .stop  = ptlrpc_lprocfs_svc_req_history_stop,
 943                 .next  = ptlrpc_lprocfs_svc_req_history_next,
 944                 .show  = ptlrpc_lprocfs_svc_req_history_show,
 945         };
 946         struct seq_file *seqf;
 947         int rc;
 948
 949         rc = seq_open(file, &sops);
 950         if (rc)
 951                 return rc;
 952
 953         seqf = file->private_data;
 954         seqf->private = inode->i_private;
 955         return 0;
 956 }
 957
 958 /* See also lprocfs_rd_timeouts */
 959 static int ptlrpc_lprocfs_timeouts_seq_show(struct seq_file *m, void *n)
 960 {
 961         struct ptlrpc_service *svc = m->private;
 962         struct ptlrpc_service_part *svcpt;
 963         struct dhms ts;
 964         time64_t worstt;
 965         unsigned int cur;
 966         unsigned int worst;
 967         int i;
 968
 969         if (AT_OFF) {
 970                 seq_printf(m, "adaptive timeouts off, using obd_timeout %u\n",
 971                            obd_timeout);
 972                 return 0;
 973         }
 974
 975         ptlrpc_service_for_each_part(svcpt, i, svc) {
 976                 cur     = at_get(&svcpt->scp_at_estimate);
 977                 worst   = svcpt->scp_at_estimate.at_worst_ever;
 978                 worstt  = svcpt->scp_at_estimate.at_worst_time;
 979                 s2dhms(&ts, ktime_get_real_seconds() - worstt);
 980
 981                 seq_printf(m, "%10s : cur %3u  worst %3u (at %lld, "
 982                            DHMS_FMT " ago) ", "service",
 983                            cur, worst, (s64)worstt, DHMS_VARS(&ts));
 984
 985                 lprocfs_at_hist_helper(m, &svcpt->scp_at_estimate);
 986         }
 987
 988         return 0;
 989 }
 990
 991 LPROC_SEQ_FOPS_RO(ptlrpc_lprocfs_timeouts);
 992
 993 static ssize_t high_priority_ratio_show(struct kobject *kobj,
 994                                         struct attribute *attr,
 995                                         char *buf)
 996 {
 997         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
 998                                                   srv_kobj);
 999         return sprintf(buf, "%d\n", svc->srv_hpreq_ratio);
1000 }
1001
1002 static ssize_t high_priority_ratio_store(struct kobject *kobj,
1003                                          struct attribute *attr,
1004                                          const char *buffer,
1005                                          size_t count)
1006 {
1007         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
1008                                                   srv_kobj);
1009         int rc;
1010         int val;
1011
1012         rc = kstrtoint(buffer, 10, &val);
1013         if (rc < 0)
1014                 return rc;
1015
1016         if (val < 0)
1017                 return -ERANGE;
1018
1019         spin_lock(&svc->srv_lock);
1020         svc->srv_hpreq_ratio = val;
1021         spin_unlock(&svc->srv_lock);
1022
1023         return count;
1024 }
1025 LUSTRE_RW_ATTR(high_priority_ratio);
1026
1027 static struct attribute *ptlrpc_svc_attrs[] = {
1028         &lustre_attr_threads_min.attr,
1029         &lustre_attr_threads_started.attr,
1030         &lustre_attr_threads_max.attr,
1031         &lustre_attr_high_priority_ratio.attr,
1032         NULL,
1033 };
1034
1035 static void ptlrpc_sysfs_svc_release(struct kobject *kobj)
1036 {
1037         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
1038                                                   srv_kobj);
1039
1040         complete(&svc->srv_kobj_unregister);
1041 }
1042
1043 static struct kobj_type ptlrpc_svc_ktype = {
1044         .default_attrs  = ptlrpc_svc_attrs,
1045         .sysfs_ops      = &lustre_sysfs_ops,
1046         .release        = ptlrpc_sysfs_svc_release,
1047 };
1048
1049 void ptlrpc_sysfs_unregister_service(struct ptlrpc_service *svc)
1050 {
1051         /* Let's see if we had a chance at initialization first */
1052         if (svc->srv_kobj.kset) {
1053                 kobject_put(&svc->srv_kobj);
1054                 wait_for_completion(&svc->srv_kobj_unregister);
1055         }
1056 }
1057
1058 int ptlrpc_sysfs_register_service(struct kset *parent,
1059                                   struct ptlrpc_service *svc)
1060 {
1061         int rc;
1062
1063         svc->srv_kobj.kset = parent;
1064         init_completion(&svc->srv_kobj_unregister);
1065         rc = kobject_init_and_add(&svc->srv_kobj, &ptlrpc_svc_ktype, NULL,
1066                                   "%s", svc->srv_name);
1067
1068         return rc;
1069 }
1070
1071 void ptlrpc_ldebugfs_register_service(struct dentry *entry,
1072                                       struct ptlrpc_service *svc)
1073 {
1074         struct lprocfs_vars lproc_vars[] = {
1075                 {.name       = "req_buffer_history_len",
1076                  .fops       = &ptlrpc_lprocfs_req_history_len_fops,
1077                  .data       = svc},
1078                 {.name       = "req_buffer_history_max",
1079                  .fops       = &ptlrpc_lprocfs_req_history_max_fops,
1080                  .data       = svc},
1081                 {.name       = "timeouts",
1082                  .fops       = &ptlrpc_lprocfs_timeouts_fops,
1083                  .data       = svc},
1084                 {.name       = "nrs_policies",
1085                  .fops       = &ptlrpc_lprocfs_nrs_fops,
1086                  .data       = svc},
1087                 {NULL}
1088         };
1089         static const struct file_operations req_history_fops = {
1090                 .owner       = THIS_MODULE,
1091                 .open   = ptlrpc_lprocfs_svc_req_history_open,
1092                 .read   = seq_read,
1093                 .llseek      = seq_lseek,
1094                 .release     = lprocfs_seq_release,
1095         };
1096
1097         int rc;
1098
1099         ptlrpc_ldebugfs_register(entry, svc->srv_name,
1100                                  "stats", &svc->srv_debugfs_entry,
1101                                  &svc->srv_stats);
1102
1103         if (IS_ERR_OR_NULL(svc->srv_debugfs_entry))
1104                 return;
1105
1106         ldebugfs_add_vars(svc->srv_debugfs_entry, lproc_vars, NULL);
1107
1108         rc = ldebugfs_seq_create(svc->srv_debugfs_entry, "req_history",
1109                                  0400, &req_history_fops, svc);
1110         if (rc)
1111                 CWARN("Error adding the req_history file\n");
1112 }
1113
1114 void ptlrpc_lprocfs_register_obd(struct obd_device *obddev)
1115 {
1116         ptlrpc_ldebugfs_register(obddev->obd_debugfs_entry, NULL, "stats",
1117                                  &obddev->obd_svc_debugfs_entry,
1118                                  &obddev->obd_svc_stats);
1119 }
1120 EXPORT_SYMBOL(ptlrpc_lprocfs_register_obd);
1121
1122 void ptlrpc_lprocfs_rpc_sent(struct ptlrpc_request *req, long amount)
1123 {
1124         struct lprocfs_stats *svc_stats;
1125         __u32 op = lustre_msg_get_opc(req->rq_reqmsg);
1126         int opc = opcode_offset(op);
1127
1128         svc_stats = req->rq_import->imp_obd->obd_svc_stats;
1129         if (!svc_stats || opc <= 0)
1130                 return;
1131         LASSERT(opc < LUSTRE_MAX_OPCODES);
1132         if (!(op == LDLM_ENQUEUE || op == MDS_REINT))
1133                 lprocfs_counter_add(svc_stats, opc + EXTRA_MAX_OPCODES, amount);
1134 }
1135
1136 void ptlrpc_lprocfs_brw(struct ptlrpc_request *req, int bytes)
1137 {
1138         struct lprocfs_stats *svc_stats;
1139         int idx;
1140
1141         if (!req->rq_import)
1142                 return;
1143         svc_stats = req->rq_import->imp_obd->obd_svc_stats;
1144         if (!svc_stats)
1145                 return;
1146         idx = lustre_msg_get_opc(req->rq_reqmsg);
1147         switch (idx) {
1148         case OST_READ:
1149                 idx = BRW_READ_BYTES + PTLRPC_LAST_CNTR;
1150                 break;
1151         case OST_WRITE:
1152                 idx = BRW_WRITE_BYTES + PTLRPC_LAST_CNTR;
1153                 break;
1154         default:
1155                 LASSERTF(0, "unsupported opcode %u\n", idx);
1156                 break;
1157         }
1158
1159         lprocfs_counter_add(svc_stats, idx, bytes);
1160 }
1161 EXPORT_SYMBOL(ptlrpc_lprocfs_brw);
1162
1163 void ptlrpc_lprocfs_unregister_service(struct ptlrpc_service *svc)
1164 {
1165         if (!IS_ERR_OR_NULL(svc->srv_debugfs_entry))
1166                 ldebugfs_remove(&svc->srv_debugfs_entry);
1167
1168         if (svc->srv_stats)
1169                 lprocfs_free_stats(&svc->srv_stats);
1170 }
1171
1172 void ptlrpc_lprocfs_unregister_obd(struct obd_device *obd)
1173 {
1174         if (!IS_ERR_OR_NULL(obd->obd_svc_debugfs_entry))
1175                 ldebugfs_remove(&obd->obd_svc_debugfs_entry);
1176
1177         if (obd->obd_svc_stats)
1178                 lprocfs_free_stats(&obd->obd_svc_stats);
1179 }
1180 EXPORT_SYMBOL(ptlrpc_lprocfs_unregister_obd);
1181
1182 #undef BUFLEN
1183
1184 int lprocfs_wr_ping(struct file *file, const char __user *buffer,
1185                     size_t count, loff_t *off)
1186 {
1187         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
1188         struct ptlrpc_request *req;
1189         int rc;
1190
1191         rc = lprocfs_climp_check(obd);
1192         if (rc)
1193                 return rc;
1194
1195         req = ptlrpc_prep_ping(obd->u.cli.cl_import);
1196         up_read(&obd->u.cli.cl_sem);
1197         if (!req)
1198                 return -ENOMEM;
1199
1200         req->rq_send_state = LUSTRE_IMP_FULL;
1201
1202         rc = ptlrpc_queue_wait(req);
1203
1204         ptlrpc_req_finished(req);
1205         if (rc >= 0)
1206                 return count;
1207         return rc;
1208 }
1209 EXPORT_SYMBOL(lprocfs_wr_ping);
1210
1211 /* Write the connection UUID to this file to attempt to connect to that node.
1212  * The connection UUID is a node's primary NID. For example,
1213  * "echo connection=192.168.0.1@tcp0::instance > .../import".
1214  */
1215 int lprocfs_wr_import(struct file *file, const char __user *buffer,
1216                       size_t count, loff_t *off)
1217 {
1218         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
1219         struct obd_import *imp = obd->u.cli.cl_import;
1220         char *kbuf = NULL;
1221         char *uuid;
1222         char *ptr;
1223         int do_reconn = 1;
1224         const char prefix[] = "connection=";
1225         const int prefix_len = sizeof(prefix) - 1;
1226
1227         if (count > PAGE_SIZE - 1 || count <= prefix_len)
1228                 return -EINVAL;
1229
1230         kbuf = kzalloc(count + 1, GFP_NOFS);
1231         if (!kbuf)
1232                 return -ENOMEM;
1233
1234         if (copy_from_user(kbuf, buffer, count)) {
1235                 count = -EFAULT;
1236                 goto out;
1237         }
1238
1239         kbuf[count] = 0;
1240
1241         /* only support connection=uuid::instance now */
1242         if (strncmp(prefix, kbuf, prefix_len) != 0) {
1243                 count = -EINVAL;
1244                 goto out;
1245         }
1246
1247         uuid = kbuf + prefix_len;
1248         ptr = strstr(uuid, "::");
1249         if (ptr) {
1250                 __u32 inst;
1251                 char *endptr;
1252
1253                 *ptr = 0;
1254                 do_reconn = 0;
1255                 ptr += strlen("::");
1256                 inst = simple_strtoul(ptr, &endptr, 10);
1257                 if (*endptr) {
1258                         CERROR("config: wrong instance # %s\n", ptr);
1259                 } else if (inst != imp->imp_connect_data.ocd_instance) {
1260                         CDEBUG(D_INFO, "IR: %s is connecting to an obsoleted target(%u/%u), reconnecting...\n",
1261                                imp->imp_obd->obd_name,
1262                                imp->imp_connect_data.ocd_instance, inst);
1263                         do_reconn = 1;
1264                 } else {
1265                         CDEBUG(D_INFO, "IR: %s has already been connecting to new target(%u)\n",
1266                                imp->imp_obd->obd_name, inst);
1267                 }
1268         }
1269
1270         if (do_reconn)
1271                 ptlrpc_recover_import(imp, uuid, 1);
1272
1273 out:
1274         kfree(kbuf);
1275         return count;
1276 }
1277 EXPORT_SYMBOL(lprocfs_wr_import);
1278
1279 int lprocfs_rd_pinger_recov(struct seq_file *m, void *n)
1280 {
1281         struct obd_device *obd = m->private;
1282         struct obd_import *imp = obd->u.cli.cl_import;
1283         int rc;
1284
1285         rc = lprocfs_climp_check(obd);
1286         if (rc)
1287                 return rc;
1288
1289         seq_printf(m, "%d\n", !imp->imp_no_pinger_recover);
1290         up_read(&obd->u.cli.cl_sem);
1291
1292         return 0;
1293 }
1294 EXPORT_SYMBOL(lprocfs_rd_pinger_recov);
1295
1296 int lprocfs_wr_pinger_recov(struct file *file, const char __user *buffer,
1297                             size_t count, loff_t *off)
1298 {
1299         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
1300         struct client_obd *cli = &obd->u.cli;
1301         struct obd_import *imp = cli->cl_import;
1302         int rc, val;
1303
1304         rc = lprocfs_write_helper(buffer, count, &val);
1305         if (rc < 0)
1306                 return rc;
1307
1308         if (val != 0 && val != 1)
1309                 return -ERANGE;
1310
1311         rc = lprocfs_climp_check(obd);
1312         if (rc)
1313                 return rc;
1314
1315         spin_lock(&imp->imp_lock);
1316         imp->imp_no_pinger_recover = !val;
1317         spin_unlock(&imp->imp_lock);
1318         up_read(&obd->u.cli.cl_sem);
1319
1320         return count;
1321 }
1322 EXPORT_SYMBOL(lprocfs_wr_pinger_recov);