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, 2017, 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
  35 #include <obd_support.h>
  36 #include <obd.h>
  37 #include <lprocfs_status.h>
  38 #include <lustre_net.h>
  39 #include <obd_class.h>
  40 #include "ptlrpc_internal.h"
  41
  42
  43 static struct ll_rpc_opcode {
  44      __u32       opcode;
  45      const char *opname;
  46 } ll_rpc_opcode_table[LUSTRE_MAX_OPCODES] = {
  47         { OST_REPLY,        "ost_reply" },
  48         { OST_GETATTR,      "ost_getattr" },
  49         { OST_SETATTR,      "ost_setattr" },
  50         { OST_READ,         "ost_read" },
  51         { OST_WRITE,        "ost_write" },
  52         { OST_CREATE ,      "ost_create" },
  53         { OST_DESTROY,      "ost_destroy" },
  54         { OST_GET_INFO,     "ost_get_info" },
  55         { OST_CONNECT,      "ost_connect" },
  56         { OST_DISCONNECT,   "ost_disconnect" },
  57         { OST_PUNCH,        "ost_punch" },
  58         { OST_OPEN,         "ost_open" },
  59         { OST_CLOSE,        "ost_close" },
  60         { OST_STATFS,       "ost_statfs" },
  61         { 14,                NULL },    /* formerly OST_SAN_READ */
  62         { 15,                NULL },    /* formerly OST_SAN_WRITE */
  63         { OST_SYNC,         "ost_sync" },
  64         { OST_SET_INFO,     "ost_set_info" },
  65         { OST_QUOTACHECK,   "ost_quotacheck" },
  66         { OST_QUOTACTL,     "ost_quotactl" },
  67         { OST_QUOTA_ADJUST_QUNIT, "ost_quota_adjust_qunit" },
  68         { OST_LADVISE,      "ost_ladvise" },
  69         { MDS_GETATTR,      "mds_getattr" },
  70         { MDS_GETATTR_NAME, "mds_getattr_lock" },
  71         { MDS_CLOSE,        "mds_close" },
  72         { MDS_REINT,        "mds_reint" },
  73         { MDS_READPAGE,     "mds_readpage" },
  74         { MDS_CONNECT,      "mds_connect" },
  75         { MDS_DISCONNECT,   "mds_disconnect" },
  76         { MDS_GET_ROOT,     "mds_get_root" },
  77         { MDS_STATFS,       "mds_statfs" },
  78         { MDS_PIN,          "mds_pin" },
  79         { MDS_UNPIN,        "mds_unpin" },
  80         { MDS_SYNC,         "mds_sync" },
  81         { MDS_DONE_WRITING, "mds_done_writing" },
  82         { MDS_SET_INFO,     "mds_set_info" },
  83         { MDS_QUOTACHECK,   "mds_quotacheck" },
  84         { MDS_QUOTACTL,     "mds_quotactl" },
  85         { MDS_GETXATTR,     "mds_getxattr" },
  86         { MDS_SETXATTR,     "mds_setxattr" },
  87         { MDS_WRITEPAGE,    "mds_writepage" },
  88         { MDS_IS_SUBDIR,    "mds_is_subdir" },
  89         { MDS_GET_INFO,     "mds_get_info" },
  90         { MDS_HSM_STATE_GET, "mds_hsm_state_get" },
  91         { MDS_HSM_STATE_SET, "mds_hsm_state_set" },
  92         { MDS_HSM_ACTION,   "mds_hsm_action" },
  93         { MDS_HSM_PROGRESS, "mds_hsm_progress" },
  94         { MDS_HSM_REQUEST,  "mds_hsm_request" },
  95         { MDS_HSM_CT_REGISTER, "mds_hsm_ct_register" },
  96         { MDS_HSM_CT_UNREGISTER, "mds_hsm_ct_unregister" },
  97         { MDS_SWAP_LAYOUTS,     "mds_swap_layouts" },
  98         { LDLM_ENQUEUE,     "ldlm_enqueue" },
  99         { LDLM_CONVERT,     "ldlm_convert" },
 100         { LDLM_CANCEL,      "ldlm_cancel" },
 101         { LDLM_BL_CALLBACK, "ldlm_bl_callback" },
 102         { LDLM_CP_CALLBACK, "ldlm_cp_callback" },
 103         { LDLM_GL_CALLBACK, "ldlm_gl_callback" },
 104         { LDLM_SET_INFO,    "ldlm_set_info" },
 105         { MGS_CONNECT,      "mgs_connect" },
 106         { MGS_DISCONNECT,   "mgs_disconnect" },
 107         { MGS_EXCEPTION,    "mgs_exception" },
 108         { MGS_TARGET_REG,   "mgs_target_reg" },
 109         { MGS_TARGET_DEL,   "mgs_target_del" },
 110         { MGS_SET_INFO,     "mgs_set_info" },
 111         { MGS_CONFIG_READ,  "mgs_config_read" },
 112         { OBD_PING,                      "obd_ping" },
 113         { 401, /* was OBD_LOG_CANCEL */  "llog_cancel" },
 114         { 402, /* was OBD_QC_CALLBACK */ "obd_quota_callback" },
 115         { OBD_IDX_READ,                  "dt_index_read" },
 116         { LLOG_ORIGIN_HANDLE_CREATE,     "llog_origin_handle_open" },
 117         { LLOG_ORIGIN_HANDLE_NEXT_BLOCK, "llog_origin_handle_next_block" },
 118         { LLOG_ORIGIN_HANDLE_READ_HEADER,"llog_origin_handle_read_header" },
 119         { 504, /*LLOG_ORIGIN_HANDLE_WRITE_REC*/"llog_origin_handle_write_rec" },
 120         { 505, /* was LLOG_ORIGIN_HANDLE_CLOSE */ "llog_origin_handle_close" },
 121         { 506, /* was LLOG_ORIGIN_CONNECT */ "llog_origin_connect" },
 122         { 507, /* was LLOG_CATINFO */    "llog_catinfo" },
 123         { LLOG_ORIGIN_HANDLE_PREV_BLOCK, "llog_origin_handle_prev_block" },
 124         { LLOG_ORIGIN_HANDLE_DESTROY,    "llog_origin_handle_destroy" },
 125         { QUOTA_DQACQ,      "quota_acquire" },
 126         { QUOTA_DQREL,      "quota_release" },
 127         { SEQ_QUERY,        "seq_query" },
 128         { SEC_CTX_INIT,     "sec_ctx_init" },
 129         { SEC_CTX_INIT_CONT,"sec_ctx_init_cont" },
 130         { SEC_CTX_FINI,     "sec_ctx_fini" },
 131         { FLD_QUERY,        "fld_query" },
 132         { FLD_READ,         "fld_read" },
 133         { OUT_UPDATE,       "out_update" },
 134         { LFSCK_NOTIFY,     "lfsck_notify" },
 135         { LFSCK_QUERY,      "lfsck_query" },
 136 };
 137
 138 static struct ll_eopcode {
 139      __u32       opcode;
 140      const char *opname;
 141 } ll_eopcode_table[EXTRA_LAST_OPC] = {
 142         { LDLM_GLIMPSE_ENQUEUE, "ldlm_glimpse_enqueue" },
 143         { LDLM_PLAIN_ENQUEUE,   "ldlm_plain_enqueue" },
 144         { LDLM_EXTENT_ENQUEUE,  "ldlm_extent_enqueue" },
 145         { LDLM_FLOCK_ENQUEUE,   "ldlm_flock_enqueue" },
 146         { LDLM_IBITS_ENQUEUE,   "ldlm_ibits_enqueue" },
 147         { MDS_REINT_SETATTR,    "mds_reint_setattr" },
 148         { MDS_REINT_CREATE,     "mds_reint_create" },
 149         { MDS_REINT_LINK,       "mds_reint_link" },
 150         { MDS_REINT_UNLINK,     "mds_reint_unlink" },
 151         { MDS_REINT_RENAME,     "mds_reint_rename" },
 152         { MDS_REINT_OPEN,       "mds_reint_open" },
 153         { MDS_REINT_SETXATTR,   "mds_reint_setxattr" },
 154         { MDS_REINT_RESYNC,     "mds_reint_resync" },
 155         { BRW_READ_BYTES,       "read_bytes" },
 156         { BRW_WRITE_BYTES,      "write_bytes" },
 157 };
 158
 159 const char *ll_opcode2str(__u32 opcode)
 160 {
 161         /* When one of the assertions below fail, chances are that:
 162          *     1) A new opcode was added in include/lustre/lustre_idl.h,
 163          *        but is missing from the table above.
 164          * or  2) The opcode space was renumbered or rearranged,
 165          *        and the opcode_offset() function in
 166          *        ptlrpc_internal.h needs to be modified.
 167          */
 168         __u32 offset = opcode_offset(opcode);
 169         LASSERTF(offset < LUSTRE_MAX_OPCODES,
 170                  "offset %u >= LUSTRE_MAX_OPCODES %u\n",
 171                  offset, LUSTRE_MAX_OPCODES);
 172         LASSERTF(ll_rpc_opcode_table[offset].opcode == opcode,
 173                  "ll_rpc_opcode_table[%u].opcode %u != opcode %u\n",
 174                  offset, ll_rpc_opcode_table[offset].opcode, opcode);
 175         return ll_rpc_opcode_table[offset].opname;
 176 }
 177
 178 const int ll_str2opcode(const char *ops)
 179 {
 180         int i;
 181
 182         for (i = 0; i < LUSTRE_MAX_OPCODES; i++) {
 183                 if (ll_rpc_opcode_table[i].opname != NULL &&
 184                     strcmp(ll_rpc_opcode_table[i].opname, ops) == 0)
 185                         return ll_rpc_opcode_table[i].opcode;
 186         }
 187
 188         return -EINVAL;
 189 }
 190
 191 static const char *ll_eopcode2str(__u32 opcode)
 192 {
 193         LASSERT(ll_eopcode_table[opcode].opcode == opcode);
 194         return ll_eopcode_table[opcode].opname;
 195 }
 196
 197 static void
 198 ptlrpc_ldebugfs_register(struct dentry *root, char *dir, char *name,
 199                          struct dentry **debugfs_root_ret,
 200                          struct lprocfs_stats **stats_ret)
 201 {
 202         struct dentry *svc_debugfs_entry;
 203         struct lprocfs_stats *svc_stats;
 204         int i, rc;
 205         unsigned int svc_counter_config = LPROCFS_CNTR_AVGMINMAX |
 206                                           LPROCFS_CNTR_STDDEV;
 207
 208         LASSERT(!*debugfs_root_ret);
 209         LASSERT(!*stats_ret);
 210
 211         svc_stats = lprocfs_alloc_stats(EXTRA_MAX_OPCODES + LUSTRE_MAX_OPCODES,
 212                                         0);
 213         if (!svc_stats)
 214                 return;
 215
 216         if (dir) {
 217                 svc_debugfs_entry = ldebugfs_register(dir, root, NULL, NULL);
 218                 if (IS_ERR(svc_debugfs_entry)) {
 219                         lprocfs_free_stats(&svc_stats);
 220                         return;
 221                 }
 222         } else {
 223                 svc_debugfs_entry = root;
 224         }
 225
 226         lprocfs_counter_init(svc_stats, PTLRPC_REQWAIT_CNTR,
 227                              svc_counter_config, "req_waittime", "usec");
 228         lprocfs_counter_init(svc_stats, PTLRPC_REQQDEPTH_CNTR,
 229                              svc_counter_config, "req_qdepth", "reqs");
 230         lprocfs_counter_init(svc_stats, PTLRPC_REQACTIVE_CNTR,
 231                              svc_counter_config, "req_active", "reqs");
 232         lprocfs_counter_init(svc_stats, PTLRPC_TIMEOUT,
 233                              svc_counter_config, "req_timeout", "sec");
 234         lprocfs_counter_init(svc_stats, PTLRPC_REQBUF_AVAIL_CNTR,
 235                              svc_counter_config, "reqbuf_avail", "bufs");
 236         for (i = 0; i < EXTRA_LAST_OPC; i++) {
 237                 char *units;
 238
 239                 switch (i) {
 240                 case BRW_WRITE_BYTES:
 241                 case BRW_READ_BYTES:
 242                         units = "bytes";
 243                         break;
 244                 default:
 245                         units = "reqs";
 246                         break;
 247                 }
 248                 lprocfs_counter_init(svc_stats, PTLRPC_LAST_CNTR + i,
 249                                      svc_counter_config,
 250                                      ll_eopcode2str(i), units);
 251         }
 252         for (i = 0; i < LUSTRE_MAX_OPCODES; i++) {
 253                 __u32 opcode = ll_rpc_opcode_table[i].opcode;
 254                 lprocfs_counter_init(svc_stats,
 255                                      EXTRA_MAX_OPCODES + i, svc_counter_config,
 256                                      ll_opcode2str(opcode), "usec");
 257         }
 258
 259         rc = ldebugfs_register_stats(svc_debugfs_entry, name, svc_stats);
 260         if (rc < 0) {
 261                 if (dir)
 262                         ldebugfs_remove(&svc_debugfs_entry);
 263                 lprocfs_free_stats(&svc_stats);
 264         } else {
 265                 if (dir)
 266                         *debugfs_root_ret = svc_debugfs_entry;
 267                 *stats_ret = svc_stats;
 268         }
 269 }
 270
 271 static int
 272 ptlrpc_lprocfs_req_history_len_seq_show(struct seq_file *m, void *v)
 273 {
 274         struct ptlrpc_service *svc = m->private;
 275         struct ptlrpc_service_part *svcpt;
 276         int     total = 0;
 277         int     i;
 278
 279         ptlrpc_service_for_each_part(svcpt, i, svc)
 280                 total += svcpt->scp_hist_nrqbds;
 281
 282         seq_printf(m, "%d\n", total);
 283         return 0;
 284 }
 285
 286
 287 LDEBUGFS_SEQ_FOPS_RO(ptlrpc_lprocfs_req_history_len);
 288
 289 static int
 290 ptlrpc_lprocfs_req_history_max_seq_show(struct seq_file *m, void *n)
 291 {
 292         struct ptlrpc_service *svc = m->private;
 293         struct ptlrpc_service_part *svcpt;
 294         int     total = 0;
 295         int     i;
 296
 297         ptlrpc_service_for_each_part(svcpt, i, svc)
 298                 total += svc->srv_hist_nrqbds_cpt_max;
 299
 300         seq_printf(m, "%d\n", total);
 301         return 0;
 302 }
 303
 304 static ssize_t
 305 ptlrpc_lprocfs_req_history_max_seq_write(struct file *file,
 306                                          const char __user *buffer,
 307                                          size_t count, loff_t *off)
 308 {
 309         struct seq_file *m = file->private_data;
 310         struct ptlrpc_service *svc = m->private;
 311         unsigned long long val;
 312         int bufpages;
 313         int rc;
 314
 315         rc = kstrtoull_from_user(buffer, count, 0, &val);
 316         if (rc < 0)
 317                 return rc;
 318
 319         if (val < 0 || val > INT_MAX)
 320                 return -ERANGE;
 321
 322         /* This sanity check is more of an insanity check; we can still
 323          * hose a kernel by allowing the request history to grow too
 324          * far. The roundup to the next power of two is an empirical way
 325          * to take care that request buffer is allocated in Slab and thus
 326          * will be upgraded */
 327         bufpages = (roundup_pow_of_two(svc->srv_buf_size) + PAGE_SIZE - 1) >>
 328                                                         PAGE_SHIFT;
 329         /* do not allow history to consume more than half max number of rqbds */
 330         if ((svc->srv_nrqbds_max == 0 && val > totalram_pages / (2 * bufpages)) ||
 331             (svc->srv_nrqbds_max != 0 && val > svc->srv_nrqbds_max / 2))
 332                 return -ERANGE;
 333
 334         spin_lock(&svc->srv_lock);
 335
 336         if (val == 0)
 337                 svc->srv_hist_nrqbds_cpt_max = 0;
 338         else
 339                 svc->srv_hist_nrqbds_cpt_max =
 340                         max(1, ((int)val / svc->srv_ncpts));
 341
 342         spin_unlock(&svc->srv_lock);
 343
 344         return count;
 345 }
 346
 347 LDEBUGFS_SEQ_FOPS(ptlrpc_lprocfs_req_history_max);
 348
 349 static int
 350 ptlrpc_lprocfs_req_buffers_max_seq_show(struct seq_file *m, void *n)
 351 {
 352         struct ptlrpc_service *svc = m->private;
 353
 354         seq_printf(m, "%d\n", svc->srv_nrqbds_max);
 355         return 0;
 356 }
 357
 358 static ssize_t
 359 ptlrpc_lprocfs_req_buffers_max_seq_write(struct file *file,
 360                                          const char __user *buffer,
 361                                          size_t count, loff_t *off)
 362 {
 363         struct seq_file *m = file->private_data;
 364         struct ptlrpc_service *svc = m->private;
 365         int val;
 366         int rc;
 367
 368         rc = kstrtoint_from_user(buffer, count, 0, &val);
 369         if (rc < 0)
 370                 return rc;
 371
 372         if (val < svc->srv_nbuf_per_group && val != 0)
 373                 return -ERANGE;
 374
 375         spin_lock(&svc->srv_lock);
 376
 377         svc->srv_nrqbds_max = (uint)val;
 378
 379         spin_unlock(&svc->srv_lock);
 380
 381         return count;
 382 }
 383
 384 LDEBUGFS_SEQ_FOPS(ptlrpc_lprocfs_req_buffers_max);
 385
 386 static ssize_t threads_min_show(struct kobject *kobj, struct attribute *attr,
 387                                 char *buf)
 388 {
 389         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
 390                                                   srv_kobj);
 391
 392         return sprintf(buf, "%d\n", svc->srv_nthrs_cpt_init * svc->srv_ncpts);
 393 }
 394
 395 static ssize_t threads_min_store(struct kobject *kobj, struct attribute *attr,
 396                                  const char *buffer, size_t count)
 397 {
 398         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
 399                                                   srv_kobj);
 400         unsigned long val;
 401         int rc;
 402
 403         rc = kstrtoul(buffer, 10, &val);
 404         if (rc < 0)
 405                 return rc;
 406
 407         if (val / svc->srv_ncpts < PTLRPC_NTHRS_INIT)
 408                 return -ERANGE;
 409
 410         spin_lock(&svc->srv_lock);
 411         if (val > svc->srv_nthrs_cpt_limit * svc->srv_ncpts) {
 412                 spin_unlock(&svc->srv_lock);
 413                 return -ERANGE;
 414         }
 415
 416         svc->srv_nthrs_cpt_init = (int)val / svc->srv_ncpts;
 417
 418         spin_unlock(&svc->srv_lock);
 419
 420         return count;
 421 }
 422 LUSTRE_RW_ATTR(threads_min);
 423
 424 static ssize_t threads_started_show(struct kobject *kobj,
 425                                     struct attribute *attr,
 426                                     char *buf)
 427 {
 428         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
 429                                                   srv_kobj);
 430         struct ptlrpc_service_part *svcpt;
 431         int total = 0;
 432         int i;
 433
 434         ptlrpc_service_for_each_part(svcpt, i, svc)
 435                 total += svcpt->scp_nthrs_running;
 436
 437         return sprintf(buf, "%d\n", total);
 438 }
 439 LUSTRE_RO_ATTR(threads_started);
 440
 441 static ssize_t threads_max_show(struct kobject *kobj, struct attribute *attr,
 442                                 char *buf)
 443 {
 444         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
 445                                                   srv_kobj);
 446
 447         return sprintf(buf, "%d\n", svc->srv_nthrs_cpt_limit * svc->srv_ncpts);
 448 }
 449
 450 static ssize_t threads_max_store(struct kobject *kobj, struct attribute *attr,
 451                                  const char *buffer, size_t count)
 452 {
 453         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
 454                                                   srv_kobj);
 455         unsigned long val;
 456         int rc;
 457
 458         rc = kstrtoul(buffer, 10, &val);
 459         if (rc < 0)
 460                 return rc;
 461
 462         if (val / svc->srv_ncpts < PTLRPC_NTHRS_INIT)
 463                 return -ERANGE;
 464
 465         spin_lock(&svc->srv_lock);
 466         if (val < svc->srv_nthrs_cpt_init * svc->srv_ncpts) {
 467                 spin_unlock(&svc->srv_lock);
 468                 return -ERANGE;
 469         }
 470
 471         svc->srv_nthrs_cpt_limit = (int)val / svc->srv_ncpts;
 472
 473         spin_unlock(&svc->srv_lock);
 474
 475         return count;
 476 }
 477 LUSTRE_RW_ATTR(threads_max);
 478
 479 /**
 480  * Translates \e ptlrpc_nrs_pol_state values to human-readable strings.
 481  *
 482  * \param[in] state The policy state
 483  */
 484 static const char *nrs_state2str(enum ptlrpc_nrs_pol_state state)
 485 {
 486         switch (state) {
 487         default:
 488                 LBUG();
 489         case NRS_POL_STATE_INVALID:
 490                 return "invalid";
 491         case NRS_POL_STATE_STOPPED:
 492                 return "stopped";
 493         case NRS_POL_STATE_STOPPING:
 494                 return "stopping";
 495         case NRS_POL_STATE_STARTING:
 496                 return "starting";
 497         case NRS_POL_STATE_STARTED:
 498                 return "started";
 499         }
 500 }
 501
 502 /**
 503  * Obtains status information for \a policy.
 504  *
 505  * Information is copied in \a info.
 506  *
 507  * \param[in] policy The policy
 508  * \param[out] info  Holds returned status information
 509  */
 510 void nrs_policy_get_info_locked(struct ptlrpc_nrs_policy *policy,
 511                                 struct ptlrpc_nrs_pol_info *info)
 512 {
 513         LASSERT(policy != NULL);
 514         LASSERT(info != NULL);
 515         assert_spin_locked(&policy->pol_nrs->nrs_lock);
 516
 517         CLASSERT(sizeof(info->pi_arg) == sizeof(policy->pol_arg));
 518         memcpy(info->pi_name, policy->pol_desc->pd_name, NRS_POL_NAME_MAX);
 519         memcpy(info->pi_arg, policy->pol_arg, sizeof(policy->pol_arg));
 520
 521         info->pi_fallback    = !!(policy->pol_flags & PTLRPC_NRS_FL_FALLBACK);
 522         info->pi_state       = policy->pol_state;
 523         /**
 524          * XXX: These are accessed without holding
 525          * ptlrpc_service_part::scp_req_lock.
 526          */
 527         info->pi_req_queued  = policy->pol_req_queued;
 528         info->pi_req_started = policy->pol_req_started;
 529 }
 530
 531 /**
 532  * Reads and prints policy status information for all policies of a PTLRPC
 533  * service.
 534  */
 535 static int ptlrpc_lprocfs_nrs_seq_show(struct seq_file *m, void *n)
 536 {
 537         struct ptlrpc_service          *svc = m->private;
 538         struct ptlrpc_service_part     *svcpt;
 539         struct ptlrpc_nrs              *nrs;
 540         struct ptlrpc_nrs_policy       *policy;
 541         struct ptlrpc_nrs_pol_info     *infos;
 542         struct ptlrpc_nrs_pol_info      tmp;
 543         unsigned                        num_pols;
 544         unsigned                        pol_idx = 0;
 545         bool                            hp = false;
 546         int                             i;
 547         int                             rc = 0;
 548         ENTRY;
 549
 550         /**
 551          * Serialize NRS core lprocfs operations with policy registration/
 552          * unregistration.
 553          */
 554         mutex_lock(&nrs_core.nrs_mutex);
 555
 556         /**
 557          * Use the first service partition's regular NRS head in order to obtain
 558          * the number of policies registered with NRS heads of this service. All
 559          * service partitions will have the same number of policies.
 560          */
 561         nrs = nrs_svcpt2nrs(svc->srv_parts[0], false);
 562
 563         spin_lock(&nrs->nrs_lock);
 564         num_pols = svc->srv_parts[0]->scp_nrs_reg.nrs_num_pols;
 565         spin_unlock(&nrs->nrs_lock);
 566
 567         OBD_ALLOC(infos, num_pols * sizeof(*infos));
 568         if (infos == NULL)
 569                 GOTO(out, rc = -ENOMEM);
 570 again:
 571
 572         ptlrpc_service_for_each_part(svcpt, i, svc) {
 573                 nrs = nrs_svcpt2nrs(svcpt, hp);
 574                 spin_lock(&nrs->nrs_lock);
 575
 576                 pol_idx = 0;
 577
 578                 list_for_each_entry(policy, &nrs->nrs_policy_list,
 579                                     pol_list) {
 580                         LASSERT(pol_idx < num_pols);
 581
 582                         nrs_policy_get_info_locked(policy, &tmp);
 583                         /**
 584                          * Copy values when handling the first service
 585                          * partition.
 586                          */
 587                         if (i == 0) {
 588                                 memcpy(infos[pol_idx].pi_name, tmp.pi_name,
 589                                        NRS_POL_NAME_MAX);
 590                                 memcpy(infos[pol_idx].pi_arg, tmp.pi_arg,
 591                                        sizeof(tmp.pi_arg));
 592                                 memcpy(&infos[pol_idx].pi_state, &tmp.pi_state,
 593                                        sizeof(tmp.pi_state));
 594                                 infos[pol_idx].pi_fallback = tmp.pi_fallback;
 595                                 /**
 596                                  * For the rest of the service partitions
 597                                  * sanity-check the values we get.
 598                                  */
 599                         } else {
 600                                 LASSERT(strncmp(infos[pol_idx].pi_name,
 601                                                 tmp.pi_name,
 602                                                 NRS_POL_NAME_MAX) == 0);
 603                                 LASSERT(strncmp(infos[pol_idx].pi_arg,
 604                                                 tmp.pi_arg,
 605                                                 sizeof(tmp.pi_arg)) == 0);
 606                                 /**
 607                                  * Not asserting ptlrpc_nrs_pol_info::pi_state,
 608                                  * because it may be different between
 609                                  * instances of the same policy in different
 610                                  * service partitions.
 611                                  */
 612                                 LASSERT(infos[pol_idx].pi_fallback ==
 613                                         tmp.pi_fallback);
 614                         }
 615
 616                         infos[pol_idx].pi_req_queued += tmp.pi_req_queued;
 617                         infos[pol_idx].pi_req_started += tmp.pi_req_started;
 618
 619                         pol_idx++;
 620                 }
 621                 spin_unlock(&nrs->nrs_lock);
 622         }
 623
 624         /**
 625          * Policy status information output is in YAML format.
 626          * For example:
 627          *
 628          *      regular_requests:
 629          *        - name: fifo
 630          *          state: started
 631          *          fallback: yes
 632          *          queued: 0
 633          *          active: 0
 634          *
 635          *        - name: crrn
 636          *          state: started
 637          *          fallback: no
 638          *          queued: 2015
 639          *          active: 384
 640          *
 641          *      high_priority_requests:
 642          *        - name: fifo
 643          *          state: started
 644          *          fallback: yes
 645          *          queued: 0
 646          *          active: 2
 647          *
 648          *        - name: crrn
 649          *          state: stopped
 650          *          fallback: no
 651          *          queued: 0
 652          *          active: 0
 653          */
 654         seq_printf(m, "%s\n", !hp ? "\nregular_requests:" :
 655                    "high_priority_requests:");
 656
 657         for (pol_idx = 0; pol_idx < num_pols; pol_idx++) {
 658                 if (strlen(infos[pol_idx].pi_arg) > 0)
 659                         seq_printf(m, "  - name: %s %s\n",
 660                                    infos[pol_idx].pi_name,
 661                                    infos[pol_idx].pi_arg);
 662                 else
 663                         seq_printf(m, "  - name: %s\n",
 664                                    infos[pol_idx].pi_name);
 665
 666
 667                 seq_printf(m, "    state: %s\n"
 668                            "    fallback: %s\n"
 669                            "    queued: %-20d\n"
 670                            "    active: %-20d\n\n",
 671                            nrs_state2str(infos[pol_idx].pi_state),
 672                            infos[pol_idx].pi_fallback ? "yes" : "no",
 673                            (int)infos[pol_idx].pi_req_queued,
 674                            (int)infos[pol_idx].pi_req_started);
 675         }
 676
 677         if (!hp && nrs_svc_has_hp(svc)) {
 678                 memset(infos, 0, num_pols * sizeof(*infos));
 679
 680                 /**
 681                  * Redo the processing for the service's HP NRS heads' policies.
 682                  */
 683                 hp = true;
 684                 goto again;
 685         }
 686
 687 out:
 688         if (infos)
 689                 OBD_FREE(infos, num_pols * sizeof(*infos));
 690
 691         mutex_unlock(&nrs_core.nrs_mutex);
 692
 693         RETURN(rc);
 694 }
 695
 696
 697 #define LPROCFS_NRS_WR_MAX_ARG (1024)
 698 /**
 699  * The longest valid command string is the maxium policy name size, plus the
 700  * length of the " reg" substring, plus the lenght of argument
 701  */
 702 #define LPROCFS_NRS_WR_MAX_CMD  (NRS_POL_NAME_MAX + sizeof(" reg") - 1 \
 703                                  + LPROCFS_NRS_WR_MAX_ARG)
 704
 705 /**
 706  * Starts and stops a given policy on a PTLRPC service.
 707  *
 708  * Commands consist of the policy name, followed by an optional [reg|hp] token;
 709  * if the optional token is omitted, the operation is performed on both the
 710  * regular and high-priority (if the service has one) NRS head.
 711  */
 712 static ssize_t
 713 ptlrpc_lprocfs_nrs_seq_write(struct file *file, const char __user *buffer,
 714                              size_t count, loff_t *off)
 715 {
 716         struct seq_file                *m = file->private_data;
 717         struct ptlrpc_service          *svc = m->private;
 718         enum ptlrpc_nrs_queue_type      queue = PTLRPC_NRS_QUEUE_BOTH;
 719         char                           *cmd;
 720         char                           *cmd_copy = NULL;
 721         char                           *policy_name;
 722         char                           *queue_name;
 723         int                             rc = 0;
 724         ENTRY;
 725
 726         if (count >= LPROCFS_NRS_WR_MAX_CMD)
 727                 GOTO(out, rc = -EINVAL);
 728
 729         OBD_ALLOC(cmd, LPROCFS_NRS_WR_MAX_CMD);
 730         if (cmd == NULL)
 731                 GOTO(out, rc = -ENOMEM);
 732         /**
 733          * strsep() modifies its argument, so keep a copy
 734          */
 735         cmd_copy = cmd;
 736
 737         if (copy_from_user(cmd, buffer, count))
 738                 GOTO(out, rc = -EFAULT);
 739
 740         cmd[count] = '\0';
 741
 742         policy_name = strsep(&cmd, " ");
 743
 744         if (strlen(policy_name) > NRS_POL_NAME_MAX - 1)
 745                 GOTO(out, rc = -EINVAL);
 746
 747         /**
 748          * No [reg|hp] token has been specified
 749          */
 750         if (cmd == NULL)
 751                 goto default_queue;
 752
 753         queue_name = strsep(&cmd, " ");
 754         /**
 755          * The second token is either an optional [reg|hp] string,
 756          * or arguments
 757          */
 758         if (strcmp(queue_name, "reg") == 0)
 759                 queue = PTLRPC_NRS_QUEUE_REG;
 760         else if (strcmp(queue_name, "hp") == 0)
 761                 queue = PTLRPC_NRS_QUEUE_HP;
 762         else {
 763                 if (cmd != NULL)
 764                         *(cmd - 1) = ' ';
 765                 cmd = queue_name;
 766         }
 767
 768 default_queue:
 769
 770         if (queue == PTLRPC_NRS_QUEUE_HP && !nrs_svc_has_hp(svc))
 771                 GOTO(out, rc = -ENODEV);
 772         else if (queue == PTLRPC_NRS_QUEUE_BOTH && !nrs_svc_has_hp(svc))
 773                 queue = PTLRPC_NRS_QUEUE_REG;
 774
 775         /**
 776          * Serialize NRS core lprocfs operations with policy registration/
 777          * unregistration.
 778          */
 779         mutex_lock(&nrs_core.nrs_mutex);
 780
 781         rc = ptlrpc_nrs_policy_control(svc, queue, policy_name,
 782                                        PTLRPC_NRS_CTL_START,
 783                                        false, cmd);
 784
 785         mutex_unlock(&nrs_core.nrs_mutex);
 786 out:
 787         if (cmd_copy)
 788                 OBD_FREE(cmd_copy, LPROCFS_NRS_WR_MAX_CMD);
 789
 790         RETURN(rc < 0 ? rc : count);
 791 }
 792
 793 LDEBUGFS_SEQ_FOPS(ptlrpc_lprocfs_nrs);
 794
 795 /** @} nrs */
 796
 797 struct ptlrpc_srh_iterator {
 798         int                     srhi_idx;
 799         __u64                   srhi_seq;
 800         struct ptlrpc_request   *srhi_req;
 801 };
 802
 803 static int
 804 ptlrpc_lprocfs_svc_req_history_seek(struct ptlrpc_service_part *svcpt,
 805                                     struct ptlrpc_srh_iterator *srhi,
 806                                     __u64 seq)
 807 {
 808         struct list_head        *e;
 809         struct ptlrpc_request   *req;
 810
 811         if (srhi->srhi_req != NULL &&
 812             srhi->srhi_seq > svcpt->scp_hist_seq_culled &&
 813             srhi->srhi_seq <= seq) {
 814                 /* If srhi_req was set previously, hasn't been culled and
 815                  * we're searching for a seq on or after it (i.e. more
 816                  * recent), search from it onwards.
 817                  * Since the service history is LRU (i.e. culled reqs will
 818                  * be near the head), we shouldn't have to do long
 819                  * re-scans */
 820                 LASSERTF(srhi->srhi_seq == srhi->srhi_req->rq_history_seq,
 821                          "%s:%d: seek seq %llu, request seq %llu\n",
 822                          svcpt->scp_service->srv_name, svcpt->scp_cpt,
 823                          srhi->srhi_seq, srhi->srhi_req->rq_history_seq);
 824                 LASSERTF(!list_empty(&svcpt->scp_hist_reqs),
 825                          "%s:%d: seek offset %llu, request seq %llu, "
 826                          "last culled %llu\n",
 827                          svcpt->scp_service->srv_name, svcpt->scp_cpt,
 828                          seq, srhi->srhi_seq, svcpt->scp_hist_seq_culled);
 829                 e = &srhi->srhi_req->rq_history_list;
 830         } else {
 831                 /* search from start */
 832                 e = svcpt->scp_hist_reqs.next;
 833         }
 834
 835         while (e != &svcpt->scp_hist_reqs) {
 836                 req = list_entry(e, struct ptlrpc_request, rq_history_list);
 837
 838                 if (req->rq_history_seq >= seq) {
 839                         srhi->srhi_seq = req->rq_history_seq;
 840                         srhi->srhi_req = req;
 841                         return 0;
 842                 }
 843                 e = e->next;
 844         }
 845
 846         return -ENOENT;
 847 }
 848
 849 /*
 850  * ptlrpc history sequence is used as "position" of seq_file, in some case,
 851  * seq_read() will increase "position" to indicate reading the next
 852  * element, however, low bits of history sequence are reserved for CPT id
 853  * (check the details from comments before ptlrpc_req_add_history), which
 854  * means seq_read() might change CPT id of history sequence and never
 855  * finish reading of requests on a CPT. To make it work, we have to shift
 856  * CPT id to high bits and timestamp to low bits, so seq_read() will only
 857  * increase timestamp which can correctly indicate the next position.
 858  */
 859
 860 /* convert seq_file pos to cpt */
 861 #define PTLRPC_REQ_POS2CPT(svc, pos)                    \
 862         ((svc)->srv_cpt_bits == 0 ? 0 :                 \
 863          (__u64)(pos) >> (64 - (svc)->srv_cpt_bits))
 864
 865 /* make up seq_file pos from cpt */
 866 #define PTLRPC_REQ_CPT2POS(svc, cpt)                    \
 867         ((svc)->srv_cpt_bits == 0 ? 0 :                 \
 868          (cpt) << (64 - (svc)->srv_cpt_bits))
 869
 870 /* convert sequence to position */
 871 #define PTLRPC_REQ_SEQ2POS(svc, seq)                    \
 872         ((svc)->srv_cpt_bits == 0 ? (seq) :             \
 873          ((seq) >> (svc)->srv_cpt_bits) |               \
 874          ((seq) << (64 - (svc)->srv_cpt_bits)))
 875
 876 /* convert position to sequence */
 877 #define PTLRPC_REQ_POS2SEQ(svc, pos)                    \
 878         ((svc)->srv_cpt_bits == 0 ? (pos) :             \
 879          ((__u64)(pos) << (svc)->srv_cpt_bits) |        \
 880          ((__u64)(pos) >> (64 - (svc)->srv_cpt_bits)))
 881
 882 static void *
 883 ptlrpc_lprocfs_svc_req_history_start(struct seq_file *s, loff_t *pos)
 884 {
 885         struct ptlrpc_service           *svc = s->private;
 886         struct ptlrpc_service_part      *svcpt;
 887         struct ptlrpc_srh_iterator      *srhi;
 888         unsigned int                    cpt;
 889         int                             rc;
 890         int                             i;
 891
 892         if (sizeof(loff_t) != sizeof(__u64)) { /* can't support */
 893                 CWARN("Failed to read request history because size of loff_t "
 894                       "%d can't match size of u64\n", (int)sizeof(loff_t));
 895                 return NULL;
 896         }
 897
 898         OBD_ALLOC(srhi, sizeof(*srhi));
 899         if (srhi == NULL)
 900                 return NULL;
 901
 902         srhi->srhi_seq = 0;
 903         srhi->srhi_req = NULL;
 904
 905         cpt = PTLRPC_REQ_POS2CPT(svc, *pos);
 906
 907         ptlrpc_service_for_each_part(svcpt, i, svc) {
 908                 if (i < cpt) /* skip */
 909                         continue;
 910                 if (i > cpt) /* make up the lowest position for this CPT */
 911                         *pos = PTLRPC_REQ_CPT2POS(svc, i);
 912
 913                 mutex_lock(&svcpt->scp_mutex);
 914                 spin_lock(&svcpt->scp_lock);
 915                 rc = ptlrpc_lprocfs_svc_req_history_seek(svcpt, srhi,
 916                                 PTLRPC_REQ_POS2SEQ(svc, *pos));
 917                 spin_unlock(&svcpt->scp_lock);
 918                 mutex_unlock(&svcpt->scp_mutex);
 919                 if (rc == 0) {
 920                         *pos = PTLRPC_REQ_SEQ2POS(svc, srhi->srhi_seq);
 921                         srhi->srhi_idx = i;
 922                         return srhi;
 923                 }
 924         }
 925
 926         OBD_FREE(srhi, sizeof(*srhi));
 927         return NULL;
 928 }
 929
 930 static void
 931 ptlrpc_lprocfs_svc_req_history_stop(struct seq_file *s, void *iter)
 932 {
 933         struct ptlrpc_srh_iterator *srhi = iter;
 934
 935         if (srhi != NULL)
 936                 OBD_FREE(srhi, sizeof(*srhi));
 937 }
 938
 939 static void *
 940 ptlrpc_lprocfs_svc_req_history_next(struct seq_file *s,
 941                                     void *iter, loff_t *pos)
 942 {
 943         struct ptlrpc_service           *svc = s->private;
 944         struct ptlrpc_srh_iterator      *srhi = iter;
 945         struct ptlrpc_service_part      *svcpt;
 946         __u64                           seq;
 947         int                             rc;
 948         int                             i;
 949
 950         for (i = srhi->srhi_idx; i < svc->srv_ncpts; i++) {
 951                 svcpt = svc->srv_parts[i];
 952
 953                 if (i > srhi->srhi_idx) { /* reset iterator for a new CPT */
 954                         srhi->srhi_req = NULL;
 955                         seq = srhi->srhi_seq = 0;
 956                 } else { /* the next sequence */
 957                         seq = srhi->srhi_seq + (1 << svc->srv_cpt_bits);
 958                 }
 959
 960                 mutex_lock(&svcpt->scp_mutex);
 961                 spin_lock(&svcpt->scp_lock);
 962                 rc = ptlrpc_lprocfs_svc_req_history_seek(svcpt, srhi, seq);
 963                 spin_unlock(&svcpt->scp_lock);
 964                 mutex_unlock(&svcpt->scp_mutex);
 965                 if (rc == 0) {
 966                         *pos = PTLRPC_REQ_SEQ2POS(svc, srhi->srhi_seq);
 967                         srhi->srhi_idx = i;
 968                         return srhi;
 969                 }
 970         }
 971
 972         OBD_FREE(srhi, sizeof(*srhi));
 973         return NULL;
 974 }
 975
 976 /* common ost/mdt so_req_printer */
 977 void target_print_req(void *seq_file, struct ptlrpc_request *req)
 978 {
 979         /* Called holding srv_lock with irqs disabled.
 980          * Print specific req contents and a newline.
 981          * CAVEAT EMPTOR: check request message length before printing!!!
 982          * You might have received any old crap so you must be just as
 983          * careful here as the service's request parser!!! */
 984         struct seq_file *sf = seq_file;
 985
 986         switch (req->rq_phase) {
 987         case RQ_PHASE_NEW:
 988                 /* still awaiting a service thread's attention, or rejected
 989                  * because the generic request message didn't unpack */
 990                 seq_printf(sf, "<not swabbed>\n");
 991                 break;
 992         case RQ_PHASE_INTERPRET:
 993                 /* being handled, so basic msg swabbed, and opc is valid
 994                  * but racing with mds_handle() */
 995         case RQ_PHASE_COMPLETE:
 996                 /* been handled by mds_handle() reply state possibly still
 997                  * volatile */
 998                 seq_printf(sf, "opc %d\n", lustre_msg_get_opc(req->rq_reqmsg));
 999                 break;
1000         default:
1001                 DEBUG_REQ(D_ERROR, req, "bad phase %d", req->rq_phase);
1002         }
1003 }
1004 EXPORT_SYMBOL(target_print_req);
1005
1006 static int ptlrpc_lprocfs_svc_req_history_show(struct seq_file *s, void *iter)
1007 {
1008         struct ptlrpc_service           *svc = s->private;
1009         struct ptlrpc_srh_iterator      *srhi = iter;
1010         struct ptlrpc_service_part      *svcpt;
1011         struct ptlrpc_request           *req;
1012         int                             rc;
1013
1014         LASSERT(srhi->srhi_idx < svc->srv_ncpts);
1015
1016         svcpt = svc->srv_parts[srhi->srhi_idx];
1017
1018         mutex_lock(&svcpt->scp_mutex);
1019         spin_lock(&svcpt->scp_lock);
1020
1021         rc = ptlrpc_lprocfs_svc_req_history_seek(svcpt, srhi, srhi->srhi_seq);
1022
1023         if (rc == 0) {
1024                 struct timespec64 arrival, sent, arrivaldiff;
1025                 char nidstr[LNET_NIDSTR_SIZE];
1026
1027                 req = srhi->srhi_req;
1028
1029                 libcfs_nid2str_r(req->rq_self, nidstr, sizeof(nidstr));
1030                 arrival.tv_sec = req->rq_arrival_time.tv_sec;
1031                 arrival.tv_nsec = req->rq_arrival_time.tv_nsec;
1032                 sent.tv_sec = req->rq_sent;
1033                 sent.tv_nsec = 0;
1034                 arrivaldiff = timespec64_sub(sent, arrival);
1035
1036                 /* Print common req fields.
1037                  * CAVEAT EMPTOR: we're racing with the service handler
1038                  * here.  The request could contain any old crap, so you
1039                  * must be just as careful as the service's request
1040                  * parser. Currently I only print stuff here I know is OK
1041                  * to look at coz it was set up in request_in_callback()!!!
1042                  */
1043                 seq_printf(s, "%lld:%s:%s:x%llu:%d:%s:%lld.%06lld:%lld.%06llds(%+lld.0s) ",
1044                            req->rq_history_seq, nidstr,
1045                            libcfs_id2str(req->rq_peer), req->rq_xid,
1046                            req->rq_reqlen, ptlrpc_rqphase2str(req),
1047                            (s64)req->rq_arrival_time.tv_sec,
1048                            (s64)(req->rq_arrival_time.tv_nsec / NSEC_PER_USEC),
1049                            (s64)arrivaldiff.tv_sec,
1050                            (s64)(arrivaldiff.tv_nsec / NSEC_PER_USEC),
1051                            (s64)(req->rq_sent - req->rq_deadline));
1052                 if (svc->srv_ops.so_req_printer == NULL)
1053                         seq_printf(s, "\n");
1054                 else
1055                         svc->srv_ops.so_req_printer(s, srhi->srhi_req);
1056         }
1057
1058         spin_unlock(&svcpt->scp_lock);
1059         mutex_unlock(&svcpt->scp_mutex);
1060
1061         return rc;
1062 }
1063
1064 static int
1065 ptlrpc_lprocfs_svc_req_history_open(struct inode *inode, struct file *file)
1066 {
1067         static struct seq_operations sops = {
1068                 .start = ptlrpc_lprocfs_svc_req_history_start,
1069                 .stop  = ptlrpc_lprocfs_svc_req_history_stop,
1070                 .next  = ptlrpc_lprocfs_svc_req_history_next,
1071                 .show  = ptlrpc_lprocfs_svc_req_history_show,
1072         };
1073         struct seq_file *seqf;
1074         int             rc;
1075
1076         rc = LPROCFS_ENTRY_CHECK(inode);
1077         if (rc < 0)
1078                 return rc;
1079
1080         rc = seq_open(file, &sops);
1081         if (rc)
1082                 return rc;
1083
1084         seqf = file->private_data;
1085         seqf->private = inode->i_private;
1086         return 0;
1087 }
1088
1089 /* See also lprocfs_rd_timeouts */
1090 static int ptlrpc_lprocfs_timeouts_seq_show(struct seq_file *m, void *n)
1091 {
1092         struct ptlrpc_service           *svc = m->private;
1093         struct ptlrpc_service_part      *svcpt;
1094         time64_t worstt;
1095         unsigned int                    cur;
1096         unsigned int                    worst;
1097         int                             i;
1098
1099         if (AT_OFF) {
1100                 seq_printf(m, "adaptive timeouts off, using obd_timeout %u\n",
1101                            obd_timeout);
1102                 return 0;
1103         }
1104
1105         ptlrpc_service_for_each_part(svcpt, i, svc) {
1106                 cur     = at_get(&svcpt->scp_at_estimate);
1107                 worst   = svcpt->scp_at_estimate.at_worst_ever;
1108                 worstt  = svcpt->scp_at_estimate.at_worst_time;
1109
1110                 seq_printf(m, "%10s : cur %3u  worst %3u (at %lld, %llds ago) ",
1111                            "service", cur, worst, (s64)worstt,
1112                            (s64)(ktime_get_real_seconds() - worstt));
1113
1114                 lprocfs_at_hist_helper(m, &svcpt->scp_at_estimate);
1115         }
1116
1117         return 0;
1118 }
1119
1120 LDEBUGFS_SEQ_FOPS_RO(ptlrpc_lprocfs_timeouts);
1121
1122 static ssize_t high_priority_ratio_show(struct kobject *kobj,
1123                                         struct attribute *attr,
1124                                         char *buf)
1125 {
1126         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
1127                                                   srv_kobj);
1128
1129         return sprintf(buf, "%d\n", svc->srv_hpreq_ratio);
1130 }
1131
1132 static ssize_t high_priority_ratio_store(struct kobject *kobj,
1133                                          struct attribute *attr,
1134                                          const char *buffer,
1135                                          size_t count)
1136 {
1137         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
1138                                                   srv_kobj);
1139         int rc;
1140         unsigned long val;
1141
1142         rc = kstrtoul(buffer, 10, &val);
1143         if (rc < 0)
1144                 return rc;
1145
1146         spin_lock(&svc->srv_lock);
1147         svc->srv_hpreq_ratio = val;
1148         spin_unlock(&svc->srv_lock);
1149
1150         return count;
1151 }
1152 LUSTRE_RW_ATTR(high_priority_ratio);
1153
1154 static struct attribute *ptlrpc_svc_attrs[] = {
1155         &lustre_attr_threads_min.attr,
1156         &lustre_attr_threads_started.attr,
1157         &lustre_attr_threads_max.attr,
1158         &lustre_attr_high_priority_ratio.attr,
1159         NULL,
1160 };
1161
1162 static void ptlrpc_sysfs_svc_release(struct kobject *kobj)
1163 {
1164         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
1165                                                   srv_kobj);
1166
1167         complete(&svc->srv_kobj_unregister);
1168 }
1169
1170 static struct kobj_type ptlrpc_svc_ktype = {
1171         .default_attrs  = ptlrpc_svc_attrs,
1172         .sysfs_ops      = &lustre_sysfs_ops,
1173         .release        = ptlrpc_sysfs_svc_release,
1174 };
1175
1176 void ptlrpc_sysfs_unregister_service(struct ptlrpc_service *svc)
1177 {
1178         /* Let's see if we had a chance at initialization first */
1179         if (svc->srv_kobj.kset) {
1180                 kobject_put(&svc->srv_kobj);
1181                 wait_for_completion(&svc->srv_kobj_unregister);
1182         }
1183 }
1184
1185 int ptlrpc_sysfs_register_service(struct kset *parent,
1186                                   struct ptlrpc_service *svc)
1187 {
1188         svc->srv_kobj.kset = parent;
1189         init_completion(&svc->srv_kobj_unregister);
1190         return kobject_init_and_add(&svc->srv_kobj, &ptlrpc_svc_ktype,
1191                                     &parent->kobj, "%s", svc->srv_name);
1192 }
1193
1194 void ptlrpc_ldebugfs_register_service(struct dentry *entry,
1195                                       struct ptlrpc_service *svc)
1196 {
1197         struct lprocfs_vars lproc_vars[] = {
1198                 { .name = "req_buffer_history_len",
1199                   .fops = &ptlrpc_lprocfs_req_history_len_fops,
1200                   .data = svc },
1201                 { .name = "req_buffer_history_max",
1202                   .fops = &ptlrpc_lprocfs_req_history_max_fops,
1203                   .data = svc },
1204                 { .name = "timeouts",
1205                   .fops = &ptlrpc_lprocfs_timeouts_fops,
1206                   .data = svc },
1207                 { .name = "nrs_policies",
1208                   .fops = &ptlrpc_lprocfs_nrs_fops,
1209                   .data = svc },
1210                 { .name = "req_buffers_max",
1211                   .fops = &ptlrpc_lprocfs_req_buffers_max_fops,
1212                   .data = svc },
1213                 { NULL }
1214         };
1215         static struct file_operations req_history_fops = {
1216                 .owner       = THIS_MODULE,
1217                 .open        = ptlrpc_lprocfs_svc_req_history_open,
1218                 .read        = seq_read,
1219                 .llseek      = seq_lseek,
1220                 .release     = lprocfs_seq_release,
1221         };
1222
1223         int rc;
1224
1225         ptlrpc_ldebugfs_register(entry, svc->srv_name, "stats",
1226                                  &svc->srv_debugfs_entry, &svc->srv_stats);
1227         if (IS_ERR_OR_NULL(svc->srv_debugfs_entry))
1228                 return;
1229
1230         ldebugfs_add_vars(svc->srv_debugfs_entry, lproc_vars, NULL);
1231
1232         rc = ldebugfs_seq_create(svc->srv_debugfs_entry, "req_history",
1233                                  0400, &req_history_fops, svc);
1234         if (rc)
1235                 CWARN("Error adding the req_history file\n");
1236 }
1237
1238 void ptlrpc_lprocfs_register_obd(struct obd_device *obddev)
1239 {
1240         ptlrpc_ldebugfs_register(obddev->obd_debugfs_entry, NULL, "stats",
1241                                  &obddev->obd_svc_debugfs_entry,
1242                                  &obddev->obd_svc_stats);
1243 }
1244 EXPORT_SYMBOL(ptlrpc_lprocfs_register_obd);
1245
1246 void ptlrpc_lprocfs_rpc_sent(struct ptlrpc_request *req, long amount)
1247 {
1248         struct lprocfs_stats *svc_stats;
1249         __u32 op = lustre_msg_get_opc(req->rq_reqmsg);
1250         int opc = opcode_offset(op);
1251
1252         svc_stats = req->rq_import->imp_obd->obd_svc_stats;
1253         if (svc_stats == NULL || opc <= 0)
1254                 return;
1255         LASSERT(opc < LUSTRE_MAX_OPCODES);
1256         if (!(op == LDLM_ENQUEUE || op == MDS_REINT))
1257                 lprocfs_counter_add(svc_stats, opc + EXTRA_MAX_OPCODES, amount);
1258 }
1259
1260 void ptlrpc_lprocfs_brw(struct ptlrpc_request *req, int bytes)
1261 {
1262         struct lprocfs_stats *svc_stats;
1263         int idx;
1264
1265         if (!req->rq_import)
1266                 return;
1267         svc_stats = req->rq_import->imp_obd->obd_svc_stats;
1268         if (!svc_stats)
1269                 return;
1270         idx = lustre_msg_get_opc(req->rq_reqmsg);
1271         switch (idx) {
1272         case OST_READ:
1273                 idx = BRW_READ_BYTES + PTLRPC_LAST_CNTR;
1274                 break;
1275         case OST_WRITE:
1276                 idx = BRW_WRITE_BYTES + PTLRPC_LAST_CNTR;
1277                 break;
1278         default:
1279                 LASSERTF(0, "unsupported opcode %u\n", idx);
1280                 break;
1281         }
1282
1283         lprocfs_counter_add(svc_stats, idx, bytes);
1284 }
1285
1286 EXPORT_SYMBOL(ptlrpc_lprocfs_brw);
1287
1288 void ptlrpc_lprocfs_unregister_service(struct ptlrpc_service *svc)
1289 {
1290         if (!IS_ERR_OR_NULL(svc->srv_debugfs_entry))
1291                 ldebugfs_remove(&svc->srv_debugfs_entry);
1292
1293         if (svc->srv_stats)
1294                 lprocfs_free_stats(&svc->srv_stats);
1295 }
1296
1297 void ptlrpc_lprocfs_unregister_obd(struct obd_device *obd)
1298 {
1299         /* cleanup first to allow concurrent access to device's
1300          * stats via debugfs to complete safely
1301          */
1302         lprocfs_obd_cleanup(obd);
1303
1304         if (!IS_ERR_OR_NULL(obd->obd_svc_debugfs_entry))
1305                 ldebugfs_remove(&obd->obd_svc_debugfs_entry);
1306
1307         if (obd->obd_svc_stats)
1308                 lprocfs_free_stats(&obd->obd_svc_stats);
1309 }
1310 EXPORT_SYMBOL(ptlrpc_lprocfs_unregister_obd);
1311
1312 ssize_t ping_store(struct kobject *kobj, struct attribute *attr,
1313                    const char *buffer, size_t count)
1314 {
1315         struct obd_device *obd = container_of(kobj, struct obd_device,
1316                                               obd_kset.kobj);
1317         struct ptlrpc_request *req;
1318         int rc;
1319
1320         ENTRY;
1321         LPROCFS_CLIMP_CHECK(obd);
1322         req = ptlrpc_prep_ping(obd->u.cli.cl_import);
1323         LPROCFS_CLIMP_EXIT(obd);
1324         if (!req)
1325                 RETURN(-ENOMEM);
1326
1327         req->rq_send_state = LUSTRE_IMP_FULL;
1328
1329         rc = ptlrpc_queue_wait(req);
1330         ptlrpc_req_finished(req);
1331
1332         RETURN(rc >= 0 ? count : rc);
1333 }
1334 EXPORT_SYMBOL(ping_store);
1335
1336 ssize_t
1337 lprocfs_ping_seq_write(struct file *file, const char __user *buffer,
1338                        size_t count, loff_t *off)
1339 {
1340         struct seq_file         *m = file->private_data;
1341         struct obd_device       *obd = m->private;
1342         struct ptlrpc_request   *req;
1343         int                     rc;
1344         ENTRY;
1345
1346         LPROCFS_CLIMP_CHECK(obd);
1347         req = ptlrpc_prep_ping(obd->u.cli.cl_import);
1348         LPROCFS_CLIMP_EXIT(obd);
1349         if (req == NULL)
1350                 RETURN(-ENOMEM);
1351
1352         req->rq_send_state = LUSTRE_IMP_FULL;
1353
1354         rc = ptlrpc_queue_wait(req);
1355
1356         ptlrpc_req_finished(req);
1357         if (rc >= 0)
1358                 RETURN(count);
1359         RETURN(rc);
1360 }
1361 EXPORT_SYMBOL(lprocfs_ping_seq_write);
1362
1363 /* Write the connection UUID to this file to attempt to connect to that node.
1364  * The connection UUID is a node's primary NID. For example,
1365  * "echo connection=192.168.0.1@tcp0::instance > .../import".
1366  */
1367 ssize_t
1368 lprocfs_import_seq_write(struct file *file, const char __user *buffer,
1369                          size_t count, loff_t *off)
1370 {
1371         struct seq_file   *m    = file->private_data;
1372         struct obd_device *obd  = m->private;
1373         struct obd_import *imp  = obd->u.cli.cl_import;
1374         char *kbuf = NULL;
1375         char *uuid;
1376         char *ptr;
1377         int do_reconn = 1;
1378         const char prefix[] = "connection=";
1379         const int prefix_len = sizeof(prefix) - 1;
1380
1381         if (count > PAGE_SIZE - 1 || count <= prefix_len)
1382                 return -EINVAL;
1383
1384         OBD_ALLOC(kbuf, count + 1);
1385         if (kbuf == NULL)
1386                 return -ENOMEM;
1387
1388         if (copy_from_user(kbuf, buffer, count))
1389                 GOTO(out, count = -EFAULT);
1390
1391         kbuf[count] = 0;
1392
1393         /* only support connection=uuid::instance now */
1394         if (strncmp(prefix, kbuf, prefix_len) != 0)
1395                 GOTO(out, count = -EINVAL);
1396
1397         uuid = kbuf + prefix_len;
1398         ptr = strstr(uuid, "::");
1399         if (ptr) {
1400                 __u32 inst;
1401                 char *endptr;
1402
1403                 *ptr = 0;
1404                 do_reconn = 0;
1405                 ptr += 2; /* Skip :: */
1406                 inst = simple_strtol(ptr, &endptr, 10);
1407                 if (*endptr) {
1408                         CERROR("config: wrong instance # %s\n", ptr);
1409                 } else if (inst != imp->imp_connect_data.ocd_instance) {
1410                         CDEBUG(D_INFO, "IR: %s is connecting to an obsoleted "
1411                                "target(%u/%u), reconnecting...\n",
1412                                imp->imp_obd->obd_name,
1413                                imp->imp_connect_data.ocd_instance, inst);
1414                         do_reconn = 1;
1415                 } else {
1416                         CDEBUG(D_INFO, "IR: %s has already been connecting to "
1417                                "new target(%u)\n",
1418                                imp->imp_obd->obd_name, inst);
1419                 }
1420         }
1421
1422         if (do_reconn)
1423                 ptlrpc_recover_import(imp, uuid, 1);
1424
1425 out:
1426         OBD_FREE(kbuf, count + 1);
1427         return count;
1428 }
1429 EXPORT_SYMBOL(lprocfs_import_seq_write);
1430
1431 int lprocfs_pinger_recov_seq_show(struct seq_file *m, void *n)
1432 {
1433         struct obd_device *obd = m->private;
1434         struct obd_import *imp = obd->u.cli.cl_import;
1435
1436         LPROCFS_CLIMP_CHECK(obd);
1437         seq_printf(m, "%d\n", !imp->imp_no_pinger_recover);
1438         LPROCFS_CLIMP_EXIT(obd);
1439         return 0;
1440 }
1441 EXPORT_SYMBOL(lprocfs_pinger_recov_seq_show);
1442
1443 ssize_t
1444 lprocfs_pinger_recov_seq_write(struct file *file, const char __user *buffer,
1445                                size_t count, loff_t *off)
1446 {
1447         struct seq_file *m = file->private_data;
1448         struct obd_device *obd = m->private;
1449         struct client_obd *cli = &obd->u.cli;
1450         struct obd_import *imp = cli->cl_import;
1451         bool val;
1452         int rc;
1453
1454         rc = kstrtobool_from_user(buffer, count, &val);
1455         if (rc < 0)
1456                 return rc;
1457
1458         LPROCFS_CLIMP_CHECK(obd);
1459         spin_lock(&imp->imp_lock);
1460         imp->imp_no_pinger_recover = !val;
1461         spin_unlock(&imp->imp_lock);
1462         LPROCFS_CLIMP_EXIT(obd);
1463         return count;
1464 }
1465 EXPORT_SYMBOL(lprocfs_pinger_recov_seq_write);