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, 2016, 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         { OBD_LOG_CANCEL,       "llog_cancel" },
 114         { 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         { LLOG_ORIGIN_HANDLE_WRITE_REC,  "llog_origin_handle_write_rec" },
 120         { LLOG_ORIGIN_HANDLE_CLOSE,      "llog_origin_handle_close" },
 121         { LLOG_ORIGIN_CONNECT,           "llog_origin_connect" },
 122         { 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         { BRW_READ_BYTES,       "read_bytes" },
 155         { BRW_WRITE_BYTES,      "write_bytes" },
 156 };
 157
 158 const char *ll_opcode2str(__u32 opcode)
 159 {
 160         /* When one of the assertions below fail, chances are that:
 161          *     1) A new opcode was added in include/lustre/lustre_idl.h,
 162          *        but is missing from the table above.
 163          * or  2) The opcode space was renumbered or rearranged,
 164          *        and the opcode_offset() function in
 165          *        ptlrpc_internal.h needs to be modified.
 166          */
 167         __u32 offset = opcode_offset(opcode);
 168         LASSERTF(offset < LUSTRE_MAX_OPCODES,
 169                  "offset %u >= LUSTRE_MAX_OPCODES %u\n",
 170                  offset, LUSTRE_MAX_OPCODES);
 171         LASSERTF(ll_rpc_opcode_table[offset].opcode == opcode,
 172                  "ll_rpc_opcode_table[%u].opcode %u != opcode %u\n",
 173                  offset, ll_rpc_opcode_table[offset].opcode, opcode);
 174         return ll_rpc_opcode_table[offset].opname;
 175 }
 176
 177 const int ll_str2opcode(const char *ops)
 178 {
 179         int i;
 180
 181         for (i = 0; i < LUSTRE_MAX_OPCODES; i++) {
 182                 if (ll_rpc_opcode_table[i].opname != NULL &&
 183                     strcmp(ll_rpc_opcode_table[i].opname, ops) == 0)
 184                         return ll_rpc_opcode_table[i].opcode;
 185         }
 186
 187         return -EINVAL;
 188 }
 189
 190 static const char *ll_eopcode2str(__u32 opcode)
 191 {
 192         LASSERT(ll_eopcode_table[opcode].opcode == opcode);
 193         return ll_eopcode_table[opcode].opname;
 194 }
 195
 196 #ifdef CONFIG_PROC_FS
 197 static void ptlrpc_lprocfs_register(struct proc_dir_entry *root, char *dir,
 198                              char *name, struct proc_dir_entry **procroot_ret,
 199                              struct lprocfs_stats **stats_ret)
 200 {
 201         struct proc_dir_entry *svc_procroot;
 202         struct lprocfs_stats *svc_stats;
 203         int i, rc;
 204         unsigned int svc_counter_config = LPROCFS_CNTR_AVGMINMAX |
 205                                           LPROCFS_CNTR_STDDEV;
 206
 207         LASSERT(*procroot_ret == NULL);
 208         LASSERT(*stats_ret == NULL);
 209
 210         svc_stats = lprocfs_alloc_stats(EXTRA_MAX_OPCODES+LUSTRE_MAX_OPCODES,0);
 211         if (svc_stats == NULL)
 212                 return;
 213
 214         if (dir) {
 215                 svc_procroot = lprocfs_register(dir, root, NULL, NULL);
 216                 if (IS_ERR(svc_procroot)) {
 217                         lprocfs_free_stats(&svc_stats);
 218                         return;
 219                 }
 220         } else {
 221                 svc_procroot = root;
 222         }
 223
 224         lprocfs_counter_init(svc_stats, PTLRPC_REQWAIT_CNTR,
 225                              svc_counter_config, "req_waittime", "usec");
 226         lprocfs_counter_init(svc_stats, PTLRPC_REQQDEPTH_CNTR,
 227                              svc_counter_config, "req_qdepth", "reqs");
 228         lprocfs_counter_init(svc_stats, PTLRPC_REQACTIVE_CNTR,
 229                              svc_counter_config, "req_active", "reqs");
 230         lprocfs_counter_init(svc_stats, PTLRPC_TIMEOUT,
 231                              svc_counter_config, "req_timeout", "sec");
 232         lprocfs_counter_init(svc_stats, PTLRPC_REQBUF_AVAIL_CNTR,
 233                              svc_counter_config, "reqbuf_avail", "bufs");
 234         for (i = 0; i < EXTRA_LAST_OPC; i++) {
 235                 char *units;
 236
 237                 switch(i) {
 238                 case BRW_WRITE_BYTES:
 239                 case BRW_READ_BYTES:
 240                         units = "bytes";
 241                         break;
 242                 default:
 243                         units = "reqs";
 244                         break;
 245                 }
 246                 lprocfs_counter_init(svc_stats, PTLRPC_LAST_CNTR + i,
 247                                      svc_counter_config,
 248                                      ll_eopcode2str(i), units);
 249         }
 250         for (i = 0; i < LUSTRE_MAX_OPCODES; i++) {
 251                 __u32 opcode = ll_rpc_opcode_table[i].opcode;
 252                 lprocfs_counter_init(svc_stats,
 253                                      EXTRA_MAX_OPCODES + i, svc_counter_config,
 254                                      ll_opcode2str(opcode), "usec");
 255         }
 256
 257         rc = lprocfs_register_stats(svc_procroot, name, svc_stats);
 258         if (rc < 0) {
 259                 if (dir)
 260                         lprocfs_remove(&svc_procroot);
 261                 lprocfs_free_stats(&svc_stats);
 262         } else {
 263                 if (dir)
 264                         *procroot_ret = svc_procroot;
 265                 *stats_ret = svc_stats;
 266         }
 267 }
 268
 269 static int
 270 ptlrpc_lprocfs_req_history_len_seq_show(struct seq_file *m, void *v)
 271 {
 272         struct ptlrpc_service *svc = m->private;
 273         struct ptlrpc_service_part *svcpt;
 274         int     total = 0;
 275         int     i;
 276
 277         ptlrpc_service_for_each_part(svcpt, i, svc)
 278                 total += svcpt->scp_hist_nrqbds;
 279
 280         seq_printf(m, "%d\n", total);
 281         return 0;
 282 }
 283 LPROC_SEQ_FOPS_RO(ptlrpc_lprocfs_req_history_len);
 284
 285 static int
 286 ptlrpc_lprocfs_req_history_max_seq_show(struct seq_file *m, void *n)
 287 {
 288         struct ptlrpc_service *svc = m->private;
 289         struct ptlrpc_service_part *svcpt;
 290         int     total = 0;
 291         int     i;
 292
 293         ptlrpc_service_for_each_part(svcpt, i, svc)
 294                 total += svc->srv_hist_nrqbds_cpt_max;
 295
 296         seq_printf(m, "%d\n", total);
 297         return 0;
 298 }
 299
 300 static ssize_t
 301 ptlrpc_lprocfs_req_history_max_seq_write(struct file *file,
 302                                          const char __user *buffer,
 303                                          size_t count, loff_t *off)
 304 {
 305         struct seq_file *m = file->private_data;
 306         struct ptlrpc_service *svc = m->private;
 307         int bufpages;
 308         __s64 val;
 309         int rc;
 310
 311         rc = lprocfs_str_to_s64(buffer, count, &val);
 312         if (rc < 0)
 313                 return rc;
 314
 315         if (val < 0 || val > INT_MAX)
 316                 return -ERANGE;
 317
 318         /* This sanity check is more of an insanity check; we can still
 319          * hose a kernel by allowing the request history to grow too
 320          * far. */
 321         bufpages = (svc->srv_buf_size + PAGE_SIZE - 1) >>
 322                                                         PAGE_SHIFT;
 323         if (val > totalram_pages/(2 * bufpages))
 324                 return -ERANGE;
 325
 326         spin_lock(&svc->srv_lock);
 327
 328         if (val == 0)
 329                 svc->srv_hist_nrqbds_cpt_max = 0;
 330         else
 331                 svc->srv_hist_nrqbds_cpt_max =
 332                         max(1, ((int)val / svc->srv_ncpts));
 333
 334         spin_unlock(&svc->srv_lock);
 335
 336         return count;
 337 }
 338 LPROC_SEQ_FOPS(ptlrpc_lprocfs_req_history_max);
 339
 340 static ssize_t threads_min_show(struct kobject *kobj, struct attribute *attr,
 341                                 char *buf)
 342 {
 343         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
 344                                                   srv_kobj);
 345
 346         return sprintf(buf, "%d\n", svc->srv_nthrs_cpt_init * svc->srv_ncpts);
 347 }
 348
 349 static ssize_t threads_min_store(struct kobject *kobj, struct attribute *attr,
 350                                  const char *buffer, size_t count)
 351 {
 352         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
 353                                                   srv_kobj);
 354         unsigned long val;
 355         int rc;
 356
 357         rc = kstrtoul(buffer, 10, &val);
 358         if (rc < 0)
 359                 return rc;
 360
 361         if (val / svc->srv_ncpts < PTLRPC_NTHRS_INIT)
 362                 return -ERANGE;
 363
 364         spin_lock(&svc->srv_lock);
 365         if (val > svc->srv_nthrs_cpt_limit * svc->srv_ncpts) {
 366                 spin_unlock(&svc->srv_lock);
 367                 return -ERANGE;
 368         }
 369
 370         svc->srv_nthrs_cpt_init = (int)val / svc->srv_ncpts;
 371
 372         spin_unlock(&svc->srv_lock);
 373
 374         return count;
 375 }
 376 LUSTRE_RW_ATTR(threads_min);
 377
 378 static ssize_t threads_started_show(struct kobject *kobj,
 379                                     struct attribute *attr,
 380                                     char *buf)
 381 {
 382         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
 383                                                   srv_kobj);
 384         struct ptlrpc_service_part *svcpt;
 385         int total = 0;
 386         int i;
 387
 388         ptlrpc_service_for_each_part(svcpt, i, svc)
 389                 total += svcpt->scp_nthrs_running;
 390
 391         return sprintf(buf, "%d\n", total);
 392 }
 393 LUSTRE_RO_ATTR(threads_started);
 394
 395 static ssize_t threads_max_show(struct kobject *kobj, struct attribute *attr,
 396                                 char *buf)
 397 {
 398         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
 399                                                   srv_kobj);
 400
 401         return sprintf(buf, "%d\n", svc->srv_nthrs_cpt_limit * svc->srv_ncpts);
 402 }
 403
 404 static ssize_t threads_max_store(struct kobject *kobj, struct attribute *attr,
 405                                  const char *buffer, size_t count)
 406 {
 407         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
 408                                                   srv_kobj);
 409         unsigned long val;
 410         int rc;
 411
 412         rc = kstrtoul(buffer, 10, &val);
 413         if (rc < 0)
 414                 return rc;
 415
 416         if (val / svc->srv_ncpts < PTLRPC_NTHRS_INIT)
 417                 return -ERANGE;
 418
 419         spin_lock(&svc->srv_lock);
 420         if (val < svc->srv_nthrs_cpt_init * svc->srv_ncpts) {
 421                 spin_unlock(&svc->srv_lock);
 422                 return -ERANGE;
 423         }
 424
 425         svc->srv_nthrs_cpt_limit = (int)val / svc->srv_ncpts;
 426
 427         spin_unlock(&svc->srv_lock);
 428
 429         return count;
 430 }
 431 LUSTRE_RW_ATTR(threads_max);
 432
 433 /**
 434  * Translates \e ptlrpc_nrs_pol_state values to human-readable strings.
 435  *
 436  * \param[in] state The policy state
 437  */
 438 static const char *nrs_state2str(enum ptlrpc_nrs_pol_state state)
 439 {
 440         switch (state) {
 441         default:
 442                 LBUG();
 443         case NRS_POL_STATE_INVALID:
 444                 return "invalid";
 445         case NRS_POL_STATE_STOPPED:
 446                 return "stopped";
 447         case NRS_POL_STATE_STOPPING:
 448                 return "stopping";
 449         case NRS_POL_STATE_STARTING:
 450                 return "starting";
 451         case NRS_POL_STATE_STARTED:
 452                 return "started";
 453         }
 454 }
 455
 456 /**
 457  * Obtains status information for \a policy.
 458  *
 459  * Information is copied in \a info.
 460  *
 461  * \param[in] policy The policy
 462  * \param[out] info  Holds returned status information
 463  */
 464 void nrs_policy_get_info_locked(struct ptlrpc_nrs_policy *policy,
 465                                 struct ptlrpc_nrs_pol_info *info)
 466 {
 467         LASSERT(policy != NULL);
 468         LASSERT(info != NULL);
 469         assert_spin_locked(&policy->pol_nrs->nrs_lock);
 470
 471         CLASSERT(sizeof(info->pi_arg) == sizeof(policy->pol_arg));
 472         memcpy(info->pi_name, policy->pol_desc->pd_name, NRS_POL_NAME_MAX);
 473         memcpy(info->pi_arg, policy->pol_arg, sizeof(policy->pol_arg));
 474
 475         info->pi_fallback    = !!(policy->pol_flags & PTLRPC_NRS_FL_FALLBACK);
 476         info->pi_state       = policy->pol_state;
 477         /**
 478          * XXX: These are accessed without holding
 479          * ptlrpc_service_part::scp_req_lock.
 480          */
 481         info->pi_req_queued  = policy->pol_req_queued;
 482         info->pi_req_started = policy->pol_req_started;
 483 }
 484
 485 /**
 486  * Reads and prints policy status information for all policies of a PTLRPC
 487  * service.
 488  */
 489 static int ptlrpc_lprocfs_nrs_seq_show(struct seq_file *m, void *n)
 490 {
 491         struct ptlrpc_service          *svc = m->private;
 492         struct ptlrpc_service_part     *svcpt;
 493         struct ptlrpc_nrs              *nrs;
 494         struct ptlrpc_nrs_policy       *policy;
 495         struct ptlrpc_nrs_pol_info     *infos;
 496         struct ptlrpc_nrs_pol_info      tmp;
 497         unsigned                        num_pols;
 498         unsigned                        pol_idx = 0;
 499         bool                            hp = false;
 500         int                             i;
 501         int                             rc = 0;
 502         ENTRY;
 503
 504         /**
 505          * Serialize NRS core lprocfs operations with policy registration/
 506          * unregistration.
 507          */
 508         mutex_lock(&nrs_core.nrs_mutex);
 509
 510         /**
 511          * Use the first service partition's regular NRS head in order to obtain
 512          * the number of policies registered with NRS heads of this service. All
 513          * service partitions will have the same number of policies.
 514          */
 515         nrs = nrs_svcpt2nrs(svc->srv_parts[0], false);
 516
 517         spin_lock(&nrs->nrs_lock);
 518         num_pols = svc->srv_parts[0]->scp_nrs_reg.nrs_num_pols;
 519         spin_unlock(&nrs->nrs_lock);
 520
 521         OBD_ALLOC(infos, num_pols * sizeof(*infos));
 522         if (infos == NULL)
 523                 GOTO(out, rc = -ENOMEM);
 524 again:
 525
 526         ptlrpc_service_for_each_part(svcpt, i, svc) {
 527                 nrs = nrs_svcpt2nrs(svcpt, hp);
 528                 spin_lock(&nrs->nrs_lock);
 529
 530                 pol_idx = 0;
 531
 532                 list_for_each_entry(policy, &nrs->nrs_policy_list,
 533                                     pol_list) {
 534                         LASSERT(pol_idx < num_pols);
 535
 536                         nrs_policy_get_info_locked(policy, &tmp);
 537                         /**
 538                          * Copy values when handling the first service
 539                          * partition.
 540                          */
 541                         if (i == 0) {
 542                                 memcpy(infos[pol_idx].pi_name, tmp.pi_name,
 543                                        NRS_POL_NAME_MAX);
 544                                 memcpy(infos[pol_idx].pi_arg, tmp.pi_arg,
 545                                        sizeof(tmp.pi_arg));
 546                                 memcpy(&infos[pol_idx].pi_state, &tmp.pi_state,
 547                                        sizeof(tmp.pi_state));
 548                                 infos[pol_idx].pi_fallback = tmp.pi_fallback;
 549                                 /**
 550                                  * For the rest of the service partitions
 551                                  * sanity-check the values we get.
 552                                  */
 553                         } else {
 554                                 LASSERT(strncmp(infos[pol_idx].pi_name,
 555                                                 tmp.pi_name,
 556                                                 NRS_POL_NAME_MAX) == 0);
 557                                 LASSERT(strncmp(infos[pol_idx].pi_arg,
 558                                                 tmp.pi_arg,
 559                                                 sizeof(tmp.pi_arg)) == 0);
 560                                 /**
 561                                  * Not asserting ptlrpc_nrs_pol_info::pi_state,
 562                                  * because it may be different between
 563                                  * instances of the same policy in different
 564                                  * service partitions.
 565                                  */
 566                                 LASSERT(infos[pol_idx].pi_fallback ==
 567                                         tmp.pi_fallback);
 568                         }
 569
 570                         infos[pol_idx].pi_req_queued += tmp.pi_req_queued;
 571                         infos[pol_idx].pi_req_started += tmp.pi_req_started;
 572
 573                         pol_idx++;
 574                 }
 575                 spin_unlock(&nrs->nrs_lock);
 576         }
 577
 578         /**
 579          * Policy status information output is in YAML format.
 580          * For example:
 581          *
 582          *      regular_requests:
 583          *        - name: fifo
 584          *          state: started
 585          *          fallback: yes
 586          *          queued: 0
 587          *          active: 0
 588          *
 589          *        - name: crrn
 590          *          state: started
 591          *          fallback: no
 592          *          queued: 2015
 593          *          active: 384
 594          *
 595          *      high_priority_requests:
 596          *        - name: fifo
 597          *          state: started
 598          *          fallback: yes
 599          *          queued: 0
 600          *          active: 2
 601          *
 602          *        - name: crrn
 603          *          state: stopped
 604          *          fallback: no
 605          *          queued: 0
 606          *          active: 0
 607          */
 608         seq_printf(m, "%s\n", !hp ? "\nregular_requests:" :
 609                    "high_priority_requests:");
 610
 611         for (pol_idx = 0; pol_idx < num_pols; pol_idx++) {
 612                 if (strlen(infos[pol_idx].pi_arg) > 0)
 613                         seq_printf(m, "  - name: %s %s\n",
 614                                    infos[pol_idx].pi_name,
 615                                    infos[pol_idx].pi_arg);
 616                 else
 617                         seq_printf(m, "  - name: %s\n",
 618                                    infos[pol_idx].pi_name);
 619
 620
 621                 seq_printf(m, "    state: %s\n"
 622                            "    fallback: %s\n"
 623                            "    queued: %-20d\n"
 624                            "    active: %-20d\n\n",
 625                            nrs_state2str(infos[pol_idx].pi_state),
 626                            infos[pol_idx].pi_fallback ? "yes" : "no",
 627                            (int)infos[pol_idx].pi_req_queued,
 628                            (int)infos[pol_idx].pi_req_started);
 629         }
 630
 631         if (!hp && nrs_svc_has_hp(svc)) {
 632                 memset(infos, 0, num_pols * sizeof(*infos));
 633
 634                 /**
 635                  * Redo the processing for the service's HP NRS heads' policies.
 636                  */
 637                 hp = true;
 638                 goto again;
 639         }
 640
 641 out:
 642         if (infos)
 643                 OBD_FREE(infos, num_pols * sizeof(*infos));
 644
 645         mutex_unlock(&nrs_core.nrs_mutex);
 646
 647         RETURN(rc);
 648 }
 649
 650
 651 #define LPROCFS_NRS_WR_MAX_ARG (1024)
 652 /**
 653  * The longest valid command string is the maxium policy name size, plus the
 654  * length of the " reg" substring, plus the lenght of argument
 655  */
 656 #define LPROCFS_NRS_WR_MAX_CMD  (NRS_POL_NAME_MAX + sizeof(" reg") - 1 \
 657                                  + LPROCFS_NRS_WR_MAX_ARG)
 658
 659 /**
 660  * Starts and stops a given policy on a PTLRPC service.
 661  *
 662  * Commands consist of the policy name, followed by an optional [reg|hp] token;
 663  * if the optional token is omitted, the operation is performed on both the
 664  * regular and high-priority (if the service has one) NRS head.
 665  */
 666 static ssize_t
 667 ptlrpc_lprocfs_nrs_seq_write(struct file *file, const char __user *buffer,
 668                              size_t count, loff_t *off)
 669 {
 670         struct seq_file                *m = file->private_data;
 671         struct ptlrpc_service          *svc = m->private;
 672         enum ptlrpc_nrs_queue_type      queue = PTLRPC_NRS_QUEUE_BOTH;
 673         char                           *cmd;
 674         char                           *cmd_copy = NULL;
 675         char                           *policy_name;
 676         char                           *queue_name;
 677         int                             rc = 0;
 678         ENTRY;
 679
 680         if (count >= LPROCFS_NRS_WR_MAX_CMD)
 681                 GOTO(out, rc = -EINVAL);
 682
 683         OBD_ALLOC(cmd, LPROCFS_NRS_WR_MAX_CMD);
 684         if (cmd == NULL)
 685                 GOTO(out, rc = -ENOMEM);
 686         /**
 687          * strsep() modifies its argument, so keep a copy
 688          */
 689         cmd_copy = cmd;
 690
 691         if (copy_from_user(cmd, buffer, count))
 692                 GOTO(out, rc = -EFAULT);
 693
 694         cmd[count] = '\0';
 695
 696         policy_name = strsep(&cmd, " ");
 697
 698         if (strlen(policy_name) > NRS_POL_NAME_MAX - 1)
 699                 GOTO(out, rc = -EINVAL);
 700
 701         /**
 702          * No [reg|hp] token has been specified
 703          */
 704         if (cmd == NULL)
 705                 goto default_queue;
 706
 707         queue_name = strsep(&cmd, " ");
 708         /**
 709          * The second token is either an optional [reg|hp] string,
 710          * or arguments
 711          */
 712         if (strcmp(queue_name, "reg") == 0)
 713                 queue = PTLRPC_NRS_QUEUE_REG;
 714         else if (strcmp(queue_name, "hp") == 0)
 715                 queue = PTLRPC_NRS_QUEUE_HP;
 716         else {
 717                 if (cmd != NULL)
 718                         *(cmd - 1) = ' ';
 719                 cmd = queue_name;
 720         }
 721
 722 default_queue:
 723
 724         if (queue == PTLRPC_NRS_QUEUE_HP && !nrs_svc_has_hp(svc))
 725                 GOTO(out, rc = -ENODEV);
 726         else if (queue == PTLRPC_NRS_QUEUE_BOTH && !nrs_svc_has_hp(svc))
 727                 queue = PTLRPC_NRS_QUEUE_REG;
 728
 729         /**
 730          * Serialize NRS core lprocfs operations with policy registration/
 731          * unregistration.
 732          */
 733         mutex_lock(&nrs_core.nrs_mutex);
 734
 735         rc = ptlrpc_nrs_policy_control(svc, queue, policy_name,
 736                                        PTLRPC_NRS_CTL_START,
 737                                        false, cmd);
 738
 739         mutex_unlock(&nrs_core.nrs_mutex);
 740 out:
 741         if (cmd_copy)
 742                 OBD_FREE(cmd_copy, LPROCFS_NRS_WR_MAX_CMD);
 743
 744         RETURN(rc < 0 ? rc : count);
 745 }
 746 LPROC_SEQ_FOPS(ptlrpc_lprocfs_nrs);
 747
 748 /** @} nrs */
 749
 750 struct ptlrpc_srh_iterator {
 751         int                     srhi_idx;
 752         __u64                   srhi_seq;
 753         struct ptlrpc_request   *srhi_req;
 754 };
 755
 756 static int
 757 ptlrpc_lprocfs_svc_req_history_seek(struct ptlrpc_service_part *svcpt,
 758                                     struct ptlrpc_srh_iterator *srhi,
 759                                     __u64 seq)
 760 {
 761         struct list_head        *e;
 762         struct ptlrpc_request   *req;
 763
 764         if (srhi->srhi_req != NULL &&
 765             srhi->srhi_seq > svcpt->scp_hist_seq_culled &&
 766             srhi->srhi_seq <= seq) {
 767                 /* If srhi_req was set previously, hasn't been culled and
 768                  * we're searching for a seq on or after it (i.e. more
 769                  * recent), search from it onwards.
 770                  * Since the service history is LRU (i.e. culled reqs will
 771                  * be near the head), we shouldn't have to do long
 772                  * re-scans */
 773                 LASSERTF(srhi->srhi_seq == srhi->srhi_req->rq_history_seq,
 774                          "%s:%d: seek seq %llu, request seq %llu\n",
 775                          svcpt->scp_service->srv_name, svcpt->scp_cpt,
 776                          srhi->srhi_seq, srhi->srhi_req->rq_history_seq);
 777                 LASSERTF(!list_empty(&svcpt->scp_hist_reqs),
 778                          "%s:%d: seek offset %llu, request seq %llu, "
 779                          "last culled %llu\n",
 780                          svcpt->scp_service->srv_name, svcpt->scp_cpt,
 781                          seq, srhi->srhi_seq, svcpt->scp_hist_seq_culled);
 782                 e = &srhi->srhi_req->rq_history_list;
 783         } else {
 784                 /* search from start */
 785                 e = svcpt->scp_hist_reqs.next;
 786         }
 787
 788         while (e != &svcpt->scp_hist_reqs) {
 789                 req = list_entry(e, struct ptlrpc_request, rq_history_list);
 790
 791                 if (req->rq_history_seq >= seq) {
 792                         srhi->srhi_seq = req->rq_history_seq;
 793                         srhi->srhi_req = req;
 794                         return 0;
 795                 }
 796                 e = e->next;
 797         }
 798
 799         return -ENOENT;
 800 }
 801
 802 /*
 803  * ptlrpc history sequence is used as "position" of seq_file, in some case,
 804  * seq_read() will increase "position" to indicate reading the next
 805  * element, however, low bits of history sequence are reserved for CPT id
 806  * (check the details from comments before ptlrpc_req_add_history), which
 807  * means seq_read() might change CPT id of history sequence and never
 808  * finish reading of requests on a CPT. To make it work, we have to shift
 809  * CPT id to high bits and timestamp to low bits, so seq_read() will only
 810  * increase timestamp which can correctly indicate the next position.
 811  */
 812
 813 /* convert seq_file pos to cpt */
 814 #define PTLRPC_REQ_POS2CPT(svc, pos)                    \
 815         ((svc)->srv_cpt_bits == 0 ? 0 :                 \
 816          (__u64)(pos) >> (64 - (svc)->srv_cpt_bits))
 817
 818 /* make up seq_file pos from cpt */
 819 #define PTLRPC_REQ_CPT2POS(svc, cpt)                    \
 820         ((svc)->srv_cpt_bits == 0 ? 0 :                 \
 821          (cpt) << (64 - (svc)->srv_cpt_bits))
 822
 823 /* convert sequence to position */
 824 #define PTLRPC_REQ_SEQ2POS(svc, seq)                    \
 825         ((svc)->srv_cpt_bits == 0 ? (seq) :             \
 826          ((seq) >> (svc)->srv_cpt_bits) |               \
 827          ((seq) << (64 - (svc)->srv_cpt_bits)))
 828
 829 /* convert position to sequence */
 830 #define PTLRPC_REQ_POS2SEQ(svc, pos)                    \
 831         ((svc)->srv_cpt_bits == 0 ? (pos) :             \
 832          ((__u64)(pos) << (svc)->srv_cpt_bits) |        \
 833          ((__u64)(pos) >> (64 - (svc)->srv_cpt_bits)))
 834
 835 static void *
 836 ptlrpc_lprocfs_svc_req_history_start(struct seq_file *s, loff_t *pos)
 837 {
 838         struct ptlrpc_service           *svc = s->private;
 839         struct ptlrpc_service_part      *svcpt;
 840         struct ptlrpc_srh_iterator      *srhi;
 841         unsigned int                    cpt;
 842         int                             rc;
 843         int                             i;
 844
 845         if (sizeof(loff_t) != sizeof(__u64)) { /* can't support */
 846                 CWARN("Failed to read request history because size of loff_t "
 847                       "%d can't match size of u64\n", (int)sizeof(loff_t));
 848                 return NULL;
 849         }
 850
 851         OBD_ALLOC(srhi, sizeof(*srhi));
 852         if (srhi == NULL)
 853                 return NULL;
 854
 855         srhi->srhi_seq = 0;
 856         srhi->srhi_req = NULL;
 857
 858         cpt = PTLRPC_REQ_POS2CPT(svc, *pos);
 859
 860         ptlrpc_service_for_each_part(svcpt, i, svc) {
 861                 if (i < cpt) /* skip */
 862                         continue;
 863                 if (i > cpt) /* make up the lowest position for this CPT */
 864                         *pos = PTLRPC_REQ_CPT2POS(svc, i);
 865
 866                 spin_lock(&svcpt->scp_lock);
 867                 rc = ptlrpc_lprocfs_svc_req_history_seek(svcpt, srhi,
 868                                 PTLRPC_REQ_POS2SEQ(svc, *pos));
 869                 spin_unlock(&svcpt->scp_lock);
 870                 if (rc == 0) {
 871                         *pos = PTLRPC_REQ_SEQ2POS(svc, srhi->srhi_seq);
 872                         srhi->srhi_idx = i;
 873                         return srhi;
 874                 }
 875         }
 876
 877         OBD_FREE(srhi, sizeof(*srhi));
 878         return NULL;
 879 }
 880
 881 static void
 882 ptlrpc_lprocfs_svc_req_history_stop(struct seq_file *s, void *iter)
 883 {
 884         struct ptlrpc_srh_iterator *srhi = iter;
 885
 886         if (srhi != NULL)
 887                 OBD_FREE(srhi, sizeof(*srhi));
 888 }
 889
 890 static void *
 891 ptlrpc_lprocfs_svc_req_history_next(struct seq_file *s,
 892                                     void *iter, loff_t *pos)
 893 {
 894         struct ptlrpc_service           *svc = s->private;
 895         struct ptlrpc_srh_iterator      *srhi = iter;
 896         struct ptlrpc_service_part      *svcpt;
 897         __u64                           seq;
 898         int                             rc;
 899         int                             i;
 900
 901         for (i = srhi->srhi_idx; i < svc->srv_ncpts; i++) {
 902                 svcpt = svc->srv_parts[i];
 903
 904                 if (i > srhi->srhi_idx) { /* reset iterator for a new CPT */
 905                         srhi->srhi_req = NULL;
 906                         seq = srhi->srhi_seq = 0;
 907                 } else { /* the next sequence */
 908                         seq = srhi->srhi_seq + (1 << svc->srv_cpt_bits);
 909                 }
 910
 911                 spin_lock(&svcpt->scp_lock);
 912                 rc = ptlrpc_lprocfs_svc_req_history_seek(svcpt, srhi, seq);
 913                 spin_unlock(&svcpt->scp_lock);
 914                 if (rc == 0) {
 915                         *pos = PTLRPC_REQ_SEQ2POS(svc, srhi->srhi_seq);
 916                         srhi->srhi_idx = i;
 917                         return srhi;
 918                 }
 919         }
 920
 921         OBD_FREE(srhi, sizeof(*srhi));
 922         return NULL;
 923 }
 924
 925 /* common ost/mdt so_req_printer */
 926 void target_print_req(void *seq_file, struct ptlrpc_request *req)
 927 {
 928         /* Called holding srv_lock with irqs disabled.
 929          * Print specific req contents and a newline.
 930          * CAVEAT EMPTOR: check request message length before printing!!!
 931          * You might have received any old crap so you must be just as
 932          * careful here as the service's request parser!!! */
 933         struct seq_file *sf = seq_file;
 934
 935         switch (req->rq_phase) {
 936         case RQ_PHASE_NEW:
 937                 /* still awaiting a service thread's attention, or rejected
 938                  * because the generic request message didn't unpack */
 939                 seq_printf(sf, "<not swabbed>\n");
 940                 break;
 941         case RQ_PHASE_INTERPRET:
 942                 /* being handled, so basic msg swabbed, and opc is valid
 943                  * but racing with mds_handle() */
 944         case RQ_PHASE_COMPLETE:
 945                 /* been handled by mds_handle() reply state possibly still
 946                  * volatile */
 947                 seq_printf(sf, "opc %d\n", lustre_msg_get_opc(req->rq_reqmsg));
 948                 break;
 949         default:
 950                 DEBUG_REQ(D_ERROR, req, "bad phase %d", req->rq_phase);
 951         }
 952 }
 953 EXPORT_SYMBOL(target_print_req);
 954
 955 static int ptlrpc_lprocfs_svc_req_history_show(struct seq_file *s, void *iter)
 956 {
 957         struct ptlrpc_service           *svc = s->private;
 958         struct ptlrpc_srh_iterator      *srhi = iter;
 959         struct ptlrpc_service_part      *svcpt;
 960         struct ptlrpc_request           *req;
 961         int                             rc;
 962
 963         LASSERT(srhi->srhi_idx < svc->srv_ncpts);
 964
 965         svcpt = svc->srv_parts[srhi->srhi_idx];
 966
 967         spin_lock(&svcpt->scp_lock);
 968
 969         rc = ptlrpc_lprocfs_svc_req_history_seek(svcpt, srhi, srhi->srhi_seq);
 970
 971         if (rc == 0) {
 972                 struct timespec64 arrival, sent, arrivaldiff;
 973                 char nidstr[LNET_NIDSTR_SIZE];
 974
 975                 req = srhi->srhi_req;
 976
 977                 libcfs_nid2str_r(req->rq_self, nidstr, sizeof(nidstr));
 978                 arrival.tv_sec = req->rq_arrival_time.tv_sec;
 979                 arrival.tv_nsec = req->rq_arrival_time.tv_nsec;
 980                 sent.tv_sec = req->rq_sent;
 981                 sent.tv_nsec = 0;
 982                 arrivaldiff = timespec64_sub(sent, arrival);
 983
 984                 /* Print common req fields.
 985                  * CAVEAT EMPTOR: we're racing with the service handler
 986                  * here.  The request could contain any old crap, so you
 987                  * must be just as careful as the service's request
 988                  * parser. Currently I only print stuff here I know is OK
 989                  * to look at coz it was set up in request_in_callback()!!!
 990                  */
 991                 seq_printf(s, "%lld:%s:%s:x%llu:%d:%s:%lld.%06lld:%lld.%06llds(%+lld.0s) ",
 992                            req->rq_history_seq, nidstr,
 993                            libcfs_id2str(req->rq_peer), req->rq_xid,
 994                            req->rq_reqlen, ptlrpc_rqphase2str(req),
 995                            (s64)req->rq_arrival_time.tv_sec,
 996                            (s64)(req->rq_arrival_time.tv_nsec / NSEC_PER_USEC),
 997                            (s64)arrivaldiff.tv_sec,
 998                            (s64)(arrivaldiff.tv_nsec / NSEC_PER_USEC),
 999                            (s64)(req->rq_sent - req->rq_deadline));
1000                 if (svc->srv_ops.so_req_printer == NULL)
1001                         seq_printf(s, "\n");
1002                 else
1003                         svc->srv_ops.so_req_printer(s, srhi->srhi_req);
1004         }
1005
1006         spin_unlock(&svcpt->scp_lock);
1007         return rc;
1008 }
1009
1010 static int
1011 ptlrpc_lprocfs_svc_req_history_open(struct inode *inode, struct file *file)
1012 {
1013         static struct seq_operations sops = {
1014                 .start = ptlrpc_lprocfs_svc_req_history_start,
1015                 .stop  = ptlrpc_lprocfs_svc_req_history_stop,
1016                 .next  = ptlrpc_lprocfs_svc_req_history_next,
1017                 .show  = ptlrpc_lprocfs_svc_req_history_show,
1018         };
1019         struct seq_file *seqf;
1020         int             rc;
1021
1022         rc = LPROCFS_ENTRY_CHECK(inode);
1023         if (rc < 0)
1024                 return rc;
1025
1026         rc = seq_open(file, &sops);
1027         if (rc)
1028                 return rc;
1029
1030         seqf = file->private_data;
1031         seqf->private = PDE_DATA(inode);
1032         return 0;
1033 }
1034
1035 /* See also lprocfs_rd_timeouts */
1036 static int ptlrpc_lprocfs_timeouts_seq_show(struct seq_file *m, void *n)
1037 {
1038         struct ptlrpc_service           *svc = m->private;
1039         struct ptlrpc_service_part      *svcpt;
1040         time64_t worstt;
1041         unsigned int                    cur;
1042         unsigned int                    worst;
1043         int                             i;
1044
1045         if (AT_OFF) {
1046                 seq_printf(m, "adaptive timeouts off, using obd_timeout %u\n",
1047                            obd_timeout);
1048                 return 0;
1049         }
1050
1051         ptlrpc_service_for_each_part(svcpt, i, svc) {
1052                 cur     = at_get(&svcpt->scp_at_estimate);
1053                 worst   = svcpt->scp_at_estimate.at_worst_ever;
1054                 worstt  = svcpt->scp_at_estimate.at_worst_time;
1055
1056                 seq_printf(m, "%10s : cur %3u  worst %3u (at %lld, %llds ago) ",
1057                            "service", cur, worst, (s64)worstt,
1058                            (s64)(ktime_get_real_seconds() - worstt));
1059
1060                 lprocfs_at_hist_helper(m, &svcpt->scp_at_estimate);
1061         }
1062
1063         return 0;
1064 }
1065 LPROC_SEQ_FOPS_RO(ptlrpc_lprocfs_timeouts);
1066
1067 static ssize_t high_priority_ratio_show(struct kobject *kobj,
1068                                         struct attribute *attr,
1069                                         char *buf)
1070 {
1071         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
1072                                                   srv_kobj);
1073
1074         return sprintf(buf, "%d\n", svc->srv_hpreq_ratio);
1075 }
1076
1077 static ssize_t high_priority_ratio_store(struct kobject *kobj,
1078                                          struct attribute *attr,
1079                                          const char *buffer,
1080                                          size_t count)
1081 {
1082         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
1083                                                   srv_kobj);
1084         int rc;
1085         unsigned long val;
1086
1087         rc = kstrtoul(buffer, 10, &val);
1088         if (rc < 0)
1089                 return rc;
1090
1091         spin_lock(&svc->srv_lock);
1092         svc->srv_hpreq_ratio = val;
1093         spin_unlock(&svc->srv_lock);
1094
1095         return count;
1096 }
1097 LUSTRE_RW_ATTR(high_priority_ratio);
1098
1099 static struct attribute *ptlrpc_svc_attrs[] = {
1100         &lustre_attr_threads_min.attr,
1101         &lustre_attr_threads_started.attr,
1102         &lustre_attr_threads_max.attr,
1103         &lustre_attr_high_priority_ratio.attr,
1104         NULL,
1105 };
1106
1107 static void ptlrpc_sysfs_svc_release(struct kobject *kobj)
1108 {
1109         struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
1110                                                   srv_kobj);
1111
1112         complete(&svc->srv_kobj_unregister);
1113 }
1114
1115 static struct kobj_type ptlrpc_svc_ktype = {
1116         .default_attrs  = ptlrpc_svc_attrs,
1117         .sysfs_ops      = &lustre_sysfs_ops,
1118         .release        = ptlrpc_sysfs_svc_release,
1119 };
1120
1121 void ptlrpc_sysfs_unregister_service(struct ptlrpc_service *svc)
1122 {
1123         /* Let's see if we had a chance at initialization first */
1124         if (svc->srv_kobj.kset) {
1125                 kobject_put(&svc->srv_kobj);
1126                 wait_for_completion(&svc->srv_kobj_unregister);
1127         }
1128 }
1129
1130 int ptlrpc_sysfs_register_service(struct kset *parent,
1131                                   struct ptlrpc_service *svc)
1132 {
1133         svc->srv_kobj.kset = parent;
1134         init_completion(&svc->srv_kobj_unregister);
1135         return kobject_init_and_add(&svc->srv_kobj, &ptlrpc_svc_ktype,
1136                                     &parent->kobj, "%s", svc->srv_name);
1137 }
1138
1139 void ptlrpc_lprocfs_register_service(struct proc_dir_entry *entry,
1140                                      struct ptlrpc_service *svc)
1141 {
1142         struct lprocfs_vars lproc_vars[] = {
1143                 { .name = "req_buffer_history_len",
1144                   .fops = &ptlrpc_lprocfs_req_history_len_fops,
1145                   .data = svc },
1146                 { .name = "req_buffer_history_max",
1147                   .fops = &ptlrpc_lprocfs_req_history_max_fops,
1148                   .data = svc },
1149                 { .name = "timeouts",
1150                   .fops = &ptlrpc_lprocfs_timeouts_fops,
1151                   .data = svc },
1152                 { .name = "nrs_policies",
1153                   .fops = &ptlrpc_lprocfs_nrs_fops,
1154                   .data = svc },
1155                 { NULL }
1156         };
1157         static struct file_operations req_history_fops = {
1158                 .owner       = THIS_MODULE,
1159                 .open        = ptlrpc_lprocfs_svc_req_history_open,
1160                 .read        = seq_read,
1161                 .llseek      = seq_lseek,
1162                 .release     = lprocfs_seq_release,
1163         };
1164
1165         int rc;
1166
1167         ptlrpc_lprocfs_register(entry, svc->srv_name,
1168                                 "stats", &svc->srv_procroot,
1169                                 &svc->srv_stats);
1170         if (svc->srv_procroot == NULL)
1171                 return;
1172
1173         lprocfs_add_vars(svc->srv_procroot, lproc_vars, NULL);
1174
1175         rc = lprocfs_seq_create(svc->srv_procroot, "req_history",
1176                                 0400, &req_history_fops, svc);
1177         if (rc)
1178                 CWARN("Error adding the req_history file\n");
1179 }
1180
1181 void ptlrpc_lprocfs_register_obd(struct obd_device *obddev)
1182 {
1183         ptlrpc_lprocfs_register(obddev->obd_proc_entry, NULL, "stats",
1184                                 &obddev->obd_svc_procroot,
1185                                 &obddev->obd_svc_stats);
1186 }
1187 EXPORT_SYMBOL(ptlrpc_lprocfs_register_obd);
1188
1189 void ptlrpc_lprocfs_rpc_sent(struct ptlrpc_request *req, long amount)
1190 {
1191         struct lprocfs_stats *svc_stats;
1192         __u32 op = lustre_msg_get_opc(req->rq_reqmsg);
1193         int opc = opcode_offset(op);
1194
1195         svc_stats = req->rq_import->imp_obd->obd_svc_stats;
1196         if (svc_stats == NULL || opc <= 0)
1197                 return;
1198         LASSERT(opc < LUSTRE_MAX_OPCODES);
1199         if (!(op == LDLM_ENQUEUE || op == MDS_REINT))
1200                 lprocfs_counter_add(svc_stats, opc + EXTRA_MAX_OPCODES, amount);
1201 }
1202
1203 void ptlrpc_lprocfs_brw(struct ptlrpc_request *req, int bytes)
1204 {
1205         struct lprocfs_stats *svc_stats;
1206         int idx;
1207
1208         if (!req->rq_import)
1209                 return;
1210         svc_stats = req->rq_import->imp_obd->obd_svc_stats;
1211         if (!svc_stats)
1212                 return;
1213         idx = lustre_msg_get_opc(req->rq_reqmsg);
1214         switch (idx) {
1215         case OST_READ:
1216                 idx = BRW_READ_BYTES + PTLRPC_LAST_CNTR;
1217                 break;
1218         case OST_WRITE:
1219                 idx = BRW_WRITE_BYTES + PTLRPC_LAST_CNTR;
1220                 break;
1221         default:
1222                 LASSERTF(0, "unsupported opcode %u\n", idx);
1223                 break;
1224         }
1225
1226         lprocfs_counter_add(svc_stats, idx, bytes);
1227 }
1228
1229 EXPORT_SYMBOL(ptlrpc_lprocfs_brw);
1230
1231 void ptlrpc_lprocfs_unregister_service(struct ptlrpc_service *svc)
1232 {
1233         if (svc->srv_procroot != NULL)
1234                 lprocfs_remove(&svc->srv_procroot);
1235
1236         if (svc->srv_stats)
1237                 lprocfs_free_stats(&svc->srv_stats);
1238 }
1239
1240 void ptlrpc_lprocfs_unregister_obd(struct obd_device *obd)
1241 {
1242         if (obd->obd_svc_procroot)
1243                 lprocfs_remove(&obd->obd_svc_procroot);
1244
1245         if (obd->obd_svc_stats)
1246                 lprocfs_free_stats(&obd->obd_svc_stats);
1247 }
1248 EXPORT_SYMBOL(ptlrpc_lprocfs_unregister_obd);
1249
1250 ssize_t
1251 lprocfs_ping_seq_write(struct file *file, const char __user *buffer,
1252                        size_t count, loff_t *off)
1253 {
1254         struct seq_file         *m = file->private_data;
1255         struct obd_device       *obd = m->private;
1256         struct ptlrpc_request   *req;
1257         int                     rc;
1258         ENTRY;
1259
1260         LPROCFS_CLIMP_CHECK(obd);
1261         req = ptlrpc_prep_ping(obd->u.cli.cl_import);
1262         LPROCFS_CLIMP_EXIT(obd);
1263         if (req == NULL)
1264                 RETURN(-ENOMEM);
1265
1266         req->rq_send_state = LUSTRE_IMP_FULL;
1267
1268         rc = ptlrpc_queue_wait(req);
1269
1270         ptlrpc_req_finished(req);
1271         if (rc >= 0)
1272                 RETURN(count);
1273         RETURN(rc);
1274 }
1275 EXPORT_SYMBOL(lprocfs_ping_seq_write);
1276
1277 /* Write the connection UUID to this file to attempt to connect to that node.
1278  * The connection UUID is a node's primary NID. For example,
1279  * "echo connection=192.168.0.1@tcp0::instance > .../import".
1280  */
1281 ssize_t
1282 lprocfs_import_seq_write(struct file *file, const char __user *buffer,
1283                          size_t count, loff_t *off)
1284 {
1285         struct seq_file   *m    = file->private_data;
1286         struct obd_device *obd  = m->private;
1287         struct obd_import *imp  = obd->u.cli.cl_import;
1288         char *kbuf = NULL;
1289         char *uuid;
1290         char *ptr;
1291         int do_reconn = 1;
1292         const char prefix[] = "connection=";
1293         const int prefix_len = sizeof(prefix) - 1;
1294
1295         if (count > PAGE_SIZE - 1 || count <= prefix_len)
1296                 return -EINVAL;
1297
1298         OBD_ALLOC(kbuf, count + 1);
1299         if (kbuf == NULL)
1300                 return -ENOMEM;
1301
1302         if (copy_from_user(kbuf, buffer, count))
1303                 GOTO(out, count = -EFAULT);
1304
1305         kbuf[count] = 0;
1306
1307         /* only support connection=uuid::instance now */
1308         if (strncmp(prefix, kbuf, prefix_len) != 0)
1309                 GOTO(out, count = -EINVAL);
1310
1311         uuid = kbuf + prefix_len;
1312         ptr = strstr(uuid, "::");
1313         if (ptr) {
1314                 __u32 inst;
1315                 char *endptr;
1316
1317                 *ptr = 0;
1318                 do_reconn = 0;
1319                 ptr += 2; /* Skip :: */
1320                 inst = simple_strtol(ptr, &endptr, 10);
1321                 if (*endptr) {
1322                         CERROR("config: wrong instance # %s\n", ptr);
1323                 } else if (inst != imp->imp_connect_data.ocd_instance) {
1324                         CDEBUG(D_INFO, "IR: %s is connecting to an obsoleted "
1325                                "target(%u/%u), reconnecting...\n",
1326                                imp->imp_obd->obd_name,
1327                                imp->imp_connect_data.ocd_instance, inst);
1328                         do_reconn = 1;
1329                 } else {
1330                         CDEBUG(D_INFO, "IR: %s has already been connecting to "
1331                                "new target(%u)\n",
1332                                imp->imp_obd->obd_name, inst);
1333                 }
1334         }
1335
1336         if (do_reconn)
1337                 ptlrpc_recover_import(imp, uuid, 1);
1338
1339 out:
1340         OBD_FREE(kbuf, count + 1);
1341         return count;
1342 }
1343 EXPORT_SYMBOL(lprocfs_import_seq_write);
1344
1345 int lprocfs_pinger_recov_seq_show(struct seq_file *m, void *n)
1346 {
1347         struct obd_device *obd = m->private;
1348         struct obd_import *imp = obd->u.cli.cl_import;
1349
1350         LPROCFS_CLIMP_CHECK(obd);
1351         seq_printf(m, "%d\n", !imp->imp_no_pinger_recover);
1352         LPROCFS_CLIMP_EXIT(obd);
1353         return 0;
1354 }
1355 EXPORT_SYMBOL(lprocfs_pinger_recov_seq_show);
1356
1357 ssize_t
1358 lprocfs_pinger_recov_seq_write(struct file *file, const char __user *buffer,
1359                                size_t count, loff_t *off)
1360 {
1361         struct seq_file *m = file->private_data;
1362         struct obd_device *obd = m->private;
1363         struct client_obd *cli = &obd->u.cli;
1364         struct obd_import *imp = cli->cl_import;
1365         int rc;
1366         __s64 val;
1367
1368         rc = lprocfs_str_to_s64(buffer, count, &val);
1369         if (rc < 0)
1370                 return rc;
1371
1372         if (val != 0 && val != 1)
1373                 return -ERANGE;
1374
1375         LPROCFS_CLIMP_CHECK(obd);
1376         spin_lock(&imp->imp_lock);
1377         imp->imp_no_pinger_recover = !val;
1378         spin_unlock(&imp->imp_lock);
1379         LPROCFS_CLIMP_EXIT(obd);
1380         return count;
1381 }
1382 EXPORT_SYMBOL(lprocfs_pinger_recov_seq_write);
1383
1384 #endif /* CONFIG_PROC_FS */