drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36 #define DEBUG_SUBSYSTEM S_CLASS
  37
  38
  39 #include "../include/obd_support.h"
  40 #include "../include/obd.h"
  41 #include "../include/lprocfs_status.h"
  42 #include "../include/lustre/lustre_idl.h"
  43 #include "../include/lustre_net.h"
  44 #include "../include/obd_class.h"
  45 #include "ptlrpc_internal.h"
  46
  47
  48 struct ll_rpc_opcode {
  49         __u32       opcode;
  50         const char *opname;
  51 } ll_rpc_opcode_table[LUSTRE_MAX_OPCODES] = {
  52         { OST_REPLY,    "ost_reply" },
  53         { OST_GETATTR,      "ost_getattr" },
  54         { OST_SETATTR,      "ost_setattr" },
  55         { OST_READ,      "ost_read" },
  56         { OST_WRITE,    "ost_write" },
  57         { OST_CREATE ,      "ost_create" },
  58         { OST_DESTROY,      "ost_destroy" },
  59         { OST_GET_INFO,     "ost_get_info" },
  60         { OST_CONNECT,      "ost_connect" },
  61         { OST_DISCONNECT,   "ost_disconnect" },
  62         { OST_PUNCH,    "ost_punch" },
  63         { OST_OPEN,      "ost_open" },
  64         { OST_CLOSE,    "ost_close" },
  65         { OST_STATFS,       "ost_statfs" },
  66         { 14,           NULL },    /* formerly OST_SAN_READ */
  67         { 15,           NULL },    /* formerly OST_SAN_WRITE */
  68         { OST_SYNC,      "ost_sync" },
  69         { OST_SET_INFO,     "ost_set_info" },
  70         { OST_QUOTACHECK,   "ost_quotacheck" },
  71         { OST_QUOTACTL,     "ost_quotactl" },
  72         { OST_QUOTA_ADJUST_QUNIT, "ost_quota_adjust_qunit" },
  73         { MDS_GETATTR,      "mds_getattr" },
  74         { MDS_GETATTR_NAME, "mds_getattr_lock" },
  75         { MDS_CLOSE,    "mds_close" },
  76         { MDS_REINT,    "mds_reint" },
  77         { MDS_READPAGE,     "mds_readpage" },
  78         { MDS_CONNECT,      "mds_connect" },
  79         { MDS_DISCONNECT,   "mds_disconnect" },
  80         { MDS_GETSTATUS,    "mds_getstatus" },
  81         { MDS_STATFS,       "mds_statfs" },
  82         { MDS_PIN,        "mds_pin" },
  83         { MDS_UNPIN,    "mds_unpin" },
  84         { MDS_SYNC,      "mds_sync" },
  85         { MDS_DONE_WRITING, "mds_done_writing" },
  86         { MDS_SET_INFO,     "mds_set_info" },
  87         { MDS_QUOTACHECK,   "mds_quotacheck" },
  88         { MDS_QUOTACTL,     "mds_quotactl" },
  89         { MDS_GETXATTR,     "mds_getxattr" },
  90         { MDS_SETXATTR,     "mds_setxattr" },
  91         { MDS_WRITEPAGE,    "mds_writepage" },
  92         { MDS_IS_SUBDIR,    "mds_is_subdir" },
  93         { MDS_GET_INFO,     "mds_get_info" },
  94         { MDS_HSM_STATE_GET, "mds_hsm_state_get" },
  95         { MDS_HSM_STATE_SET, "mds_hsm_state_set" },
  96         { MDS_HSM_ACTION,   "mds_hsm_action" },
  97         { MDS_HSM_PROGRESS, "mds_hsm_progress" },
  98         { MDS_HSM_REQUEST,  "mds_hsm_request" },
  99         { MDS_HSM_CT_REGISTER, "mds_hsm_ct_register" },
 100         { MDS_HSM_CT_UNREGISTER, "mds_hsm_ct_unregister" },
 101         { MDS_SWAP_LAYOUTS,     "mds_swap_layouts" },
 102         { LDLM_ENQUEUE,     "ldlm_enqueue" },
 103         { LDLM_CONVERT,     "ldlm_convert" },
 104         { LDLM_CANCEL,      "ldlm_cancel" },
 105         { LDLM_BL_CALLBACK, "ldlm_bl_callback" },
 106         { LDLM_CP_CALLBACK, "ldlm_cp_callback" },
 107         { LDLM_GL_CALLBACK, "ldlm_gl_callback" },
 108         { LDLM_SET_INFO,    "ldlm_set_info" },
 109         { MGS_CONNECT,      "mgs_connect" },
 110         { MGS_DISCONNECT,   "mgs_disconnect" },
 111         { MGS_EXCEPTION,    "mgs_exception" },
 112         { MGS_TARGET_REG,   "mgs_target_reg" },
 113         { MGS_TARGET_DEL,   "mgs_target_del" },
 114         { MGS_SET_INFO,     "mgs_set_info" },
 115         { MGS_CONFIG_READ,  "mgs_config_read" },
 116         { OBD_PING,      "obd_ping" },
 117         { OBD_LOG_CANCEL,       "llog_cancel" },
 118         { OBD_QC_CALLBACK,  "obd_quota_callback" },
 119         { OBD_IDX_READ,     "dt_index_read" },
 120         { LLOG_ORIGIN_HANDLE_CREATE,     "llog_origin_handle_open" },
 121         { LLOG_ORIGIN_HANDLE_NEXT_BLOCK, "llog_origin_handle_next_block" },
 122         { LLOG_ORIGIN_HANDLE_READ_HEADER, "llog_origin_handle_read_header" },
 123         { LLOG_ORIGIN_HANDLE_WRITE_REC,  "llog_origin_handle_write_rec" },
 124         { LLOG_ORIGIN_HANDLE_CLOSE,      "llog_origin_handle_close" },
 125         { LLOG_ORIGIN_CONNECT,     "llog_origin_connect" },
 126         { LLOG_CATINFO,           "llog_catinfo" },
 127         { LLOG_ORIGIN_HANDLE_PREV_BLOCK, "llog_origin_handle_prev_block" },
 128         { LLOG_ORIGIN_HANDLE_DESTROY,    "llog_origin_handle_destroy" },
 129         { QUOTA_DQACQ,      "quota_acquire" },
 130         { QUOTA_DQREL,      "quota_release" },
 131         { SEQ_QUERY,    "seq_query" },
 132         { SEC_CTX_INIT,     "sec_ctx_init" },
 133         { SEC_CTX_INIT_CONT, "sec_ctx_init_cont" },
 134         { SEC_CTX_FINI,     "sec_ctx_fini" },
 135         { FLD_QUERY,    "fld_query" },
 136         { UPDATE_OBJ,       "update_obj" },
 137 };
 138
 139 struct ll_eopcode {
 140         __u32       opcode;
 141         const char *opname;
 142 } ll_eopcode_table[EXTRA_LAST_OPC] = {
 143         { LDLM_GLIMPSE_ENQUEUE, "ldlm_glimpse_enqueue" },
 144         { LDLM_PLAIN_ENQUEUE,   "ldlm_plain_enqueue" },
 145         { LDLM_EXTENT_ENQUEUE,  "ldlm_extent_enqueue" },
 146         { LDLM_FLOCK_ENQUEUE,   "ldlm_flock_enqueue" },
 147         { LDLM_IBITS_ENQUEUE,   "ldlm_ibits_enqueue" },
 148         { MDS_REINT_SETATTR,    "mds_reint_setattr" },
 149         { MDS_REINT_CREATE,     "mds_reint_create" },
 150         { MDS_REINT_LINK,       "mds_reint_link" },
 151         { MDS_REINT_UNLINK,     "mds_reint_unlink" },
 152         { MDS_REINT_RENAME,     "mds_reint_rename" },
 153         { MDS_REINT_OPEN,       "mds_reint_open" },
 154         { MDS_REINT_SETXATTR,   "mds_reint_setxattr" },
 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 char *ll_eopcode2str(__u32 opcode)
 179 {
 180         LASSERT(ll_eopcode_table[opcode].opcode == opcode);
 181         return ll_eopcode_table[opcode].opname;
 182 }
 183 #if defined (CONFIG_PROC_FS)
 184 static void ptlrpc_lprocfs_register(struct proc_dir_entry *root, char *dir,
 185                                     char *name,
 186                                     struct proc_dir_entry **procroot_ret,
 187                                     struct lprocfs_stats **stats_ret)
 188 {
 189         struct proc_dir_entry *svc_procroot;
 190         struct lprocfs_stats *svc_stats;
 191         int i, rc;
 192         unsigned int svc_counter_config = LPROCFS_CNTR_AVGMINMAX |
 193                                           LPROCFS_CNTR_STDDEV;
 194
 195         LASSERT(*procroot_ret == NULL);
 196         LASSERT(*stats_ret == NULL);
 197
 198         svc_stats = lprocfs_alloc_stats(EXTRA_MAX_OPCODES+LUSTRE_MAX_OPCODES,
 199                                         0);
 200         if (svc_stats == NULL)
 201                 return;
 202
 203         if (dir) {
 204                 svc_procroot = lprocfs_register(dir, root, NULL, NULL);
 205                 if (IS_ERR(svc_procroot)) {
 206                         lprocfs_free_stats(&svc_stats);
 207                         return;
 208                 }
 209         } else {
 210                 svc_procroot = root;
 211         }
 212
 213         lprocfs_counter_init(svc_stats, PTLRPC_REQWAIT_CNTR,
 214                              svc_counter_config, "req_waittime", "usec");
 215         lprocfs_counter_init(svc_stats, PTLRPC_REQQDEPTH_CNTR,
 216                              svc_counter_config, "req_qdepth", "reqs");
 217         lprocfs_counter_init(svc_stats, PTLRPC_REQACTIVE_CNTR,
 218                              svc_counter_config, "req_active", "reqs");
 219         lprocfs_counter_init(svc_stats, PTLRPC_TIMEOUT,
 220                              svc_counter_config, "req_timeout", "sec");
 221         lprocfs_counter_init(svc_stats, PTLRPC_REQBUF_AVAIL_CNTR,
 222                              svc_counter_config, "reqbuf_avail", "bufs");
 223         for (i = 0; i < EXTRA_LAST_OPC; i++) {
 224                 char *units;
 225
 226                 switch (i) {
 227                 case BRW_WRITE_BYTES:
 228                 case BRW_READ_BYTES:
 229                         units = "bytes";
 230                         break;
 231                 default:
 232                         units = "reqs";
 233                         break;
 234                 }
 235                 lprocfs_counter_init(svc_stats, PTLRPC_LAST_CNTR + i,
 236                                      svc_counter_config,
 237                                      ll_eopcode2str(i), units);
 238         }
 239         for (i = 0; i < LUSTRE_MAX_OPCODES; i++) {
 240                 __u32 opcode = ll_rpc_opcode_table[i].opcode;
 241                 lprocfs_counter_init(svc_stats,
 242                                      EXTRA_MAX_OPCODES + i, svc_counter_config,
 243                                      ll_opcode2str(opcode), "usec");
 244         }
 245
 246         rc = lprocfs_register_stats(svc_procroot, name, svc_stats);
 247         if (rc < 0) {
 248                 if (dir)
 249                         lprocfs_remove(&svc_procroot);
 250                 lprocfs_free_stats(&svc_stats);
 251         } else {
 252                 if (dir)
 253                         *procroot_ret = svc_procroot;
 254                 *stats_ret = svc_stats;
 255         }
 256 }
 257
 258 static int
 259 ptlrpc_lprocfs_req_history_len_seq_show(struct seq_file *m, void *v)
 260 {
 261         struct ptlrpc_service *svc = m->private;
 262         struct ptlrpc_service_part *svcpt;
 263         int     total = 0;
 264         int     i;
 265
 266         ptlrpc_service_for_each_part(svcpt, i, svc)
 267                 total += svcpt->scp_hist_nrqbds;
 268
 269         return seq_printf(m, "%d\n", total);
 270 }
 271 LPROC_SEQ_FOPS_RO(ptlrpc_lprocfs_req_history_len);
 272
 273 static int
 274 ptlrpc_lprocfs_req_history_max_seq_show(struct seq_file *m, void *n)
 275 {
 276         struct ptlrpc_service *svc = m->private;
 277         struct ptlrpc_service_part *svcpt;
 278         int     total = 0;
 279         int     i;
 280
 281         ptlrpc_service_for_each_part(svcpt, i, svc)
 282                 total += svc->srv_hist_nrqbds_cpt_max;
 283
 284         return seq_printf(m, "%d\n", total);
 285 }
 286
 287 static ssize_t
 288 ptlrpc_lprocfs_req_history_max_seq_write(struct file *file,
 289                                         const char __user *buffer,
 290                                         size_t count, loff_t *off)
 291 {
 292         struct ptlrpc_service *svc = ((struct seq_file *)file->private_data)->private;
 293         int                         bufpages;
 294         int                         val;
 295         int                         rc;
 296
 297         rc = lprocfs_write_helper(buffer, count, &val);
 298         if (rc < 0)
 299                 return rc;
 300
 301         if (val < 0)
 302                 return -ERANGE;
 303
 304         /* This sanity check is more of an insanity check; we can still
 305          * hose a kernel by allowing the request history to grow too
 306          * far. */
 307         bufpages = (svc->srv_buf_size + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
 308         if (val > totalram_pages / (2 * bufpages))
 309                 return -ERANGE;
 310
 311         spin_lock(&svc->srv_lock);
 312
 313         if (val == 0)
 314                 svc->srv_hist_nrqbds_cpt_max = 0;
 315         else
 316                 svc->srv_hist_nrqbds_cpt_max = max(1, (val / svc->srv_ncpts));
 317
 318         spin_unlock(&svc->srv_lock);
 319
 320         return count;
 321 }
 322 LPROC_SEQ_FOPS(ptlrpc_lprocfs_req_history_max);
 323
 324 static int
 325 ptlrpc_lprocfs_threads_min_seq_show(struct seq_file *m, void *n)
 326 {
 327         struct ptlrpc_service *svc = m->private;
 328
 329         return seq_printf(m, "%d\n",
 330                         svc->srv_nthrs_cpt_init * svc->srv_ncpts);
 331 }
 332
 333 static ssize_t
 334 ptlrpc_lprocfs_threads_min_seq_write(struct file *file,
 335                                         const char __user *buffer,
 336                                         size_t count, loff_t *off)
 337 {
 338         struct ptlrpc_service *svc = ((struct seq_file *)file->private_data)->private;
 339         int     val;
 340         int     rc = lprocfs_write_helper(buffer, count, &val);
 341
 342         if (rc < 0)
 343                 return rc;
 344
 345         if (val / svc->srv_ncpts < PTLRPC_NTHRS_INIT)
 346                 return -ERANGE;
 347
 348         spin_lock(&svc->srv_lock);
 349         if (val > svc->srv_nthrs_cpt_limit * svc->srv_ncpts) {
 350                 spin_unlock(&svc->srv_lock);
 351                 return -ERANGE;
 352         }
 353
 354         svc->srv_nthrs_cpt_init = val / svc->srv_ncpts;
 355
 356         spin_unlock(&svc->srv_lock);
 357
 358         return count;
 359 }
 360 LPROC_SEQ_FOPS(ptlrpc_lprocfs_threads_min);
 361
 362 static int
 363 ptlrpc_lprocfs_threads_started_seq_show(struct seq_file *m, void *n)
 364 {
 365         struct ptlrpc_service *svc = m->private;
 366         struct ptlrpc_service_part *svcpt;
 367         int     total = 0;
 368         int     i;
 369
 370         ptlrpc_service_for_each_part(svcpt, i, svc)
 371                 total += svcpt->scp_nthrs_running;
 372
 373         return seq_printf(m, "%d\n", total);
 374 }
 375 LPROC_SEQ_FOPS_RO(ptlrpc_lprocfs_threads_started);
 376
 377 static int
 378 ptlrpc_lprocfs_threads_max_seq_show(struct seq_file *m, void *n)
 379 {
 380         struct ptlrpc_service *svc = m->private;
 381
 382         return seq_printf(m, "%d\n",
 383                         svc->srv_nthrs_cpt_limit * svc->srv_ncpts);
 384 }
 385
 386 static ssize_t
 387 ptlrpc_lprocfs_threads_max_seq_write(struct file *file,
 388                                 const char __user *buffer,
 389                                 size_t count, loff_t *off)
 390 {
 391         struct ptlrpc_service *svc = ((struct seq_file *)file->private_data)->private;
 392         int     val;
 393         int     rc = lprocfs_write_helper(buffer, count, &val);
 394
 395         if (rc < 0)
 396                 return rc;
 397
 398         if (val / svc->srv_ncpts < PTLRPC_NTHRS_INIT)
 399                 return -ERANGE;
 400
 401         spin_lock(&svc->srv_lock);
 402         if (val < svc->srv_nthrs_cpt_init * svc->srv_ncpts) {
 403                 spin_unlock(&svc->srv_lock);
 404                 return -ERANGE;
 405         }
 406
 407         svc->srv_nthrs_cpt_limit = val / svc->srv_ncpts;
 408
 409         spin_unlock(&svc->srv_lock);
 410
 411         return count;
 412 }
 413 LPROC_SEQ_FOPS(ptlrpc_lprocfs_threads_max);
 414
 415 /**
 416  * \addtogoup nrs
 417  * @{
 418  */
 419 extern struct nrs_core nrs_core;
 420
 421 /**
 422  * Translates \e ptlrpc_nrs_pol_state values to human-readable strings.
 423  *
 424  * \param[in] state The policy state
 425  */
 426 static const char *nrs_state2str(enum ptlrpc_nrs_pol_state state)
 427 {
 428         switch (state) {
 429         default:
 430                 LBUG();
 431         case NRS_POL_STATE_INVALID:
 432                 return "invalid";
 433         case NRS_POL_STATE_STOPPED:
 434                 return "stopped";
 435         case NRS_POL_STATE_STOPPING:
 436                 return "stopping";
 437         case NRS_POL_STATE_STARTING:
 438                 return "starting";
 439         case NRS_POL_STATE_STARTED:
 440                 return "started";
 441         }
 442 }
 443
 444 /**
 445  * Obtains status information for \a policy.
 446  *
 447  * Information is copied in \a info.
 448  *
 449  * \param[in] policy The policy
 450  * \param[out] info  Holds returned status information
 451  */
 452 void nrs_policy_get_info_locked(struct ptlrpc_nrs_policy *policy,
 453                                 struct ptlrpc_nrs_pol_info *info)
 454 {
 455         LASSERT(policy != NULL);
 456         LASSERT(info != NULL);
 457         assert_spin_locked(&policy->pol_nrs->nrs_lock);
 458
 459         memcpy(info->pi_name, policy->pol_desc->pd_name, NRS_POL_NAME_MAX);
 460
 461         info->pi_fallback    = !!(policy->pol_flags & PTLRPC_NRS_FL_FALLBACK);
 462         info->pi_state       = policy->pol_state;
 463         /**
 464          * XXX: These are accessed without holding
 465          * ptlrpc_service_part::scp_req_lock.
 466          */
 467         info->pi_req_queued  = policy->pol_req_queued;
 468         info->pi_req_started = policy->pol_req_started;
 469 }
 470
 471 /**
 472  * Reads and prints policy status information for all policies of a PTLRPC
 473  * service.
 474  */
 475 static int ptlrpc_lprocfs_nrs_seq_show(struct seq_file *m, void *n)
 476 {
 477         struct ptlrpc_service          *svc = m->private;
 478         struct ptlrpc_service_part     *svcpt;
 479         struct ptlrpc_nrs              *nrs;
 480         struct ptlrpc_nrs_policy       *policy;
 481         struct ptlrpc_nrs_pol_info     *infos;
 482         struct ptlrpc_nrs_pol_info      tmp;
 483         unsigned                        num_pols;
 484         unsigned                        pol_idx = 0;
 485         bool                            hp = false;
 486         int                             i;
 487         int                             rc = 0;
 488
 489         /**
 490          * Serialize NRS core lprocfs operations with policy registration/
 491          * unregistration.
 492          */
 493         mutex_lock(&nrs_core.nrs_mutex);
 494
 495         /**
 496          * Use the first service partition's regular NRS head in order to obtain
 497          * the number of policies registered with NRS heads of this service. All
 498          * service partitions will have the same number of policies.
 499          */
 500         nrs = nrs_svcpt2nrs(svc->srv_parts[0], false);
 501
 502         spin_lock(&nrs->nrs_lock);
 503         num_pols = svc->srv_parts[0]->scp_nrs_reg.nrs_num_pols;
 504         spin_unlock(&nrs->nrs_lock);
 505
 506         OBD_ALLOC(infos, num_pols * sizeof(*infos));
 507         if (infos == NULL) {
 508                 rc = -ENOMEM;
 509                 goto out;
 510         }
 511 again:
 512
 513         ptlrpc_service_for_each_part(svcpt, i, svc) {
 514                 nrs = nrs_svcpt2nrs(svcpt, hp);
 515                 spin_lock(&nrs->nrs_lock);
 516
 517                 pol_idx = 0;
 518
 519                 list_for_each_entry(policy, &nrs->nrs_policy_list,
 520                                         pol_list) {
 521                         LASSERT(pol_idx < num_pols);
 522
 523                         nrs_policy_get_info_locked(policy, &tmp);
 524                         /**
 525                          * Copy values when handling the first service
 526                          * partition.
 527                          */
 528                         if (i == 0) {
 529                                 memcpy(infos[pol_idx].pi_name, tmp.pi_name,
 530                                        NRS_POL_NAME_MAX);
 531                                 memcpy(&infos[pol_idx].pi_state, &tmp.pi_state,
 532                                        sizeof(tmp.pi_state));
 533                                 infos[pol_idx].pi_fallback = tmp.pi_fallback;
 534                                 /**
 535                                  * For the rest of the service partitions
 536                                  * sanity-check the values we get.
 537                                  */
 538                         } else {
 539                                 LASSERT(strncmp(infos[pol_idx].pi_name,
 540                                                 tmp.pi_name,
 541                                                 NRS_POL_NAME_MAX) == 0);
 542                                 /**
 543                                  * Not asserting ptlrpc_nrs_pol_info::pi_state,
 544                                  * because it may be different between
 545                                  * instances of the same policy in different
 546                                  * service partitions.
 547                                  */
 548                                 LASSERT(infos[pol_idx].pi_fallback ==
 549                                         tmp.pi_fallback);
 550                         }
 551
 552                         infos[pol_idx].pi_req_queued += tmp.pi_req_queued;
 553                         infos[pol_idx].pi_req_started += tmp.pi_req_started;
 554
 555                         pol_idx++;
 556                 }
 557                 spin_unlock(&nrs->nrs_lock);
 558         }
 559
 560         /**
 561          * Policy status information output is in YAML format.
 562          * For example:
 563          *
 564          *      regular_requests:
 565          *        - name: fifo
 566          *          state: started
 567          *          fallback: yes
 568          *          queued: 0
 569          *          active: 0
 570          *
 571          *        - name: crrn
 572          *          state: started
 573          *          fallback: no
 574          *          queued: 2015
 575          *          active: 384
 576          *
 577          *      high_priority_requests:
 578          *        - name: fifo
 579          *          state: started
 580          *          fallback: yes
 581          *          queued: 0
 582          *          active: 2
 583          *
 584          *        - name: crrn
 585          *          state: stopped
 586          *          fallback: no
 587          *          queued: 0
 588          *          active: 0
 589          */
 590         seq_printf(m, "%s\n",
 591                       !hp ?  "\nregular_requests:" : "high_priority_requests:");
 592
 593         for (pol_idx = 0; pol_idx < num_pols; pol_idx++) {
 594                 seq_printf(m,  "  - name: %s\n"
 595                                "    state: %s\n"
 596                                "    fallback: %s\n"
 597                                "    queued: %-20d\n"
 598                                "    active: %-20d\n\n",
 599                                infos[pol_idx].pi_name,
 600                                nrs_state2str(infos[pol_idx].pi_state),
 601                                infos[pol_idx].pi_fallback ? "yes" : "no",
 602                                (int)infos[pol_idx].pi_req_queued,
 603                                (int)infos[pol_idx].pi_req_started);
 604         }
 605
 606         if (!hp && nrs_svc_has_hp(svc)) {
 607                 memset(infos, 0, num_pols * sizeof(*infos));
 608
 609                 /**
 610                  * Redo the processing for the service's HP NRS heads' policies.
 611                  */
 612                 hp = true;
 613                 goto again;
 614         }
 615
 616 out:
 617         if (infos)
 618                 OBD_FREE(infos, num_pols * sizeof(*infos));
 619
 620         mutex_unlock(&nrs_core.nrs_mutex);
 621
 622         return rc;
 623 }
 624
 625 /**
 626  * The longest valid command string is the maximum policy name size, plus the
 627  * length of the " reg" substring
 628  */
 629 #define LPROCFS_NRS_WR_MAX_CMD  (NRS_POL_NAME_MAX + sizeof(" reg") - 1)
 630
 631 /**
 632  * Starts and stops a given policy on a PTLRPC service.
 633  *
 634  * Commands consist of the policy name, followed by an optional [reg|hp] token;
 635  * if the optional token is omitted, the operation is performed on both the
 636  * regular and high-priority (if the service has one) NRS head.
 637  */
 638 static ssize_t ptlrpc_lprocfs_nrs_seq_write(struct file *file,
 639                                         const char __user *buffer,
 640                                         size_t count, loff_t *off)
 641 {
 642         struct ptlrpc_service *svc = ((struct seq_file *)file->private_data)->private;
 643         enum ptlrpc_nrs_queue_type      queue = PTLRPC_NRS_QUEUE_BOTH;
 644         char                           *cmd;
 645         char                           *cmd_copy = NULL;
 646         char                           *token;
 647         int                             rc = 0;
 648
 649         if (count >= LPROCFS_NRS_WR_MAX_CMD) {
 650                 rc = -EINVAL;
 651                 goto out;
 652         }
 653
 654         OBD_ALLOC(cmd, LPROCFS_NRS_WR_MAX_CMD);
 655         if (cmd == NULL) {
 656                 rc = -ENOMEM;
 657                 goto out;
 658         }
 659         /**
 660          * strsep() modifies its argument, so keep a copy
 661          */
 662         cmd_copy = cmd;
 663
 664         if (copy_from_user(cmd, buffer, count)) {
 665                 rc = -EFAULT;
 666                 goto out;
 667         }
 668
 669         cmd[count] = '\0';
 670
 671         token = strsep(&cmd, " ");
 672
 673         if (strlen(token) > NRS_POL_NAME_MAX - 1) {
 674                 rc = -EINVAL;
 675                 goto out;
 676         }
 677
 678         /**
 679          * No [reg|hp] token has been specified
 680          */
 681         if (cmd == NULL)
 682                 goto default_queue;
 683
 684         /**
 685          * The second token is either NULL, or an optional [reg|hp] string
 686          */
 687         if (strcmp(cmd, "reg") == 0)
 688                 queue = PTLRPC_NRS_QUEUE_REG;
 689         else if (strcmp(cmd, "hp") == 0)
 690                 queue = PTLRPC_NRS_QUEUE_HP;
 691         else {
 692                 rc = -EINVAL;
 693                 goto out;
 694         }
 695
 696 default_queue:
 697
 698         if (queue == PTLRPC_NRS_QUEUE_HP && !nrs_svc_has_hp(svc)) {
 699                 rc = -ENODEV;
 700                 goto out;
 701         } else if (queue == PTLRPC_NRS_QUEUE_BOTH && !nrs_svc_has_hp(svc))
 702                 queue = PTLRPC_NRS_QUEUE_REG;
 703
 704         /**
 705          * Serialize NRS core lprocfs operations with policy registration/
 706          * unregistration.
 707          */
 708         mutex_lock(&nrs_core.nrs_mutex);
 709
 710         rc = ptlrpc_nrs_policy_control(svc, queue, token, PTLRPC_NRS_CTL_START,
 711                                        false, NULL);
 712
 713         mutex_unlock(&nrs_core.nrs_mutex);
 714 out:
 715         if (cmd_copy)
 716                 OBD_FREE(cmd_copy, LPROCFS_NRS_WR_MAX_CMD);
 717
 718         return rc < 0 ? rc : count;
 719 }
 720 LPROC_SEQ_FOPS(ptlrpc_lprocfs_nrs);
 721
 722 /** @} nrs */
 723
 724 struct ptlrpc_srh_iterator {
 725         int                     srhi_idx;
 726         __u64                   srhi_seq;
 727         struct ptlrpc_request   *srhi_req;
 728 };
 729
 730 int
 731 ptlrpc_lprocfs_svc_req_history_seek(struct ptlrpc_service_part *svcpt,
 732                                     struct ptlrpc_srh_iterator *srhi,
 733                                     __u64 seq)
 734 {
 735         struct list_head                *e;
 736         struct ptlrpc_request   *req;
 737
 738         if (srhi->srhi_req != NULL &&
 739             srhi->srhi_seq > svcpt->scp_hist_seq_culled &&
 740             srhi->srhi_seq <= seq) {
 741                 /* If srhi_req was set previously, hasn't been culled and
 742                  * we're searching for a seq on or after it (i.e. more
 743                  * recent), search from it onwards.
 744                  * Since the service history is LRU (i.e. culled reqs will
 745                  * be near the head), we shouldn't have to do long
 746                  * re-scans */
 747                 LASSERTF(srhi->srhi_seq == srhi->srhi_req->rq_history_seq,
 748                          "%s:%d: seek seq %llu, request seq %llu\n",
 749                          svcpt->scp_service->srv_name, svcpt->scp_cpt,
 750                          srhi->srhi_seq, srhi->srhi_req->rq_history_seq);
 751                 LASSERTF(!list_empty(&svcpt->scp_hist_reqs),
 752                          "%s:%d: seek offset %llu, request seq %llu, last culled %llu\n",
 753                          svcpt->scp_service->srv_name, svcpt->scp_cpt,
 754                          seq, srhi->srhi_seq, svcpt->scp_hist_seq_culled);
 755                 e = &srhi->srhi_req->rq_history_list;
 756         } else {
 757                 /* search from start */
 758                 e = svcpt->scp_hist_reqs.next;
 759         }
 760
 761         while (e != &svcpt->scp_hist_reqs) {
 762                 req = list_entry(e, struct ptlrpc_request, rq_history_list);
 763
 764                 if (req->rq_history_seq >= seq) {
 765                         srhi->srhi_seq = req->rq_history_seq;
 766                         srhi->srhi_req = req;
 767                         return 0;
 768                 }
 769                 e = e->next;
 770         }
 771
 772         return -ENOENT;
 773 }
 774
 775 /*
 776  * ptlrpc history sequence is used as "position" of seq_file, in some case,
 777  * seq_read() will increase "position" to indicate reading the next
 778  * element, however, low bits of history sequence are reserved for CPT id
 779  * (check the details from comments before ptlrpc_req_add_history), which
 780  * means seq_read() might change CPT id of history sequence and never
 781  * finish reading of requests on a CPT. To make it work, we have to shift
 782  * CPT id to high bits and timestamp to low bits, so seq_read() will only
 783  * increase timestamp which can correctly indicate the next position.
 784  */
 785
 786 /* convert seq_file pos to cpt */
 787 #define PTLRPC_REQ_POS2CPT(svc, pos)                    \
 788         ((svc)->srv_cpt_bits == 0 ? 0 :                 \
 789          (__u64)(pos) >> (64 - (svc)->srv_cpt_bits))
 790
 791 /* make up seq_file pos from cpt */
 792 #define PTLRPC_REQ_CPT2POS(svc, cpt)                    \
 793         ((svc)->srv_cpt_bits == 0 ? 0 :                 \
 794          (cpt) << (64 - (svc)->srv_cpt_bits))
 795
 796 /* convert sequence to position */
 797 #define PTLRPC_REQ_SEQ2POS(svc, seq)                    \
 798         ((svc)->srv_cpt_bits == 0 ? (seq) :             \
 799          ((seq) >> (svc)->srv_cpt_bits) |               \
 800          ((seq) << (64 - (svc)->srv_cpt_bits)))
 801
 802 /* convert position to sequence */
 803 #define PTLRPC_REQ_POS2SEQ(svc, pos)                    \
 804         ((svc)->srv_cpt_bits == 0 ? (pos) :             \
 805          ((__u64)(pos) << (svc)->srv_cpt_bits) |        \
 806          ((__u64)(pos) >> (64 - (svc)->srv_cpt_bits)))
 807
 808 static void *
 809 ptlrpc_lprocfs_svc_req_history_start(struct seq_file *s, loff_t *pos)
 810 {
 811         struct ptlrpc_service           *svc = s->private;
 812         struct ptlrpc_service_part      *svcpt;
 813         struct ptlrpc_srh_iterator      *srhi;
 814         unsigned int                    cpt;
 815         int                             rc;
 816         int                             i;
 817
 818         if (sizeof(loff_t) != sizeof(__u64)) { /* can't support */
 819                 CWARN("Failed to read request history because size of loff_t %d can't match size of u64\n",
 820                       (int)sizeof(loff_t));
 821                 return NULL;
 822         }
 823
 824         OBD_ALLOC(srhi, sizeof(*srhi));
 825         if (srhi == NULL)
 826                 return NULL;
 827
 828         srhi->srhi_seq = 0;
 829         srhi->srhi_req = NULL;
 830
 831         cpt = PTLRPC_REQ_POS2CPT(svc, *pos);
 832
 833         ptlrpc_service_for_each_part(svcpt, i, svc) {
 834                 if (i < cpt) /* skip */
 835                         continue;
 836                 if (i > cpt) /* make up the lowest position for this CPT */
 837                         *pos = PTLRPC_REQ_CPT2POS(svc, i);
 838
 839                 spin_lock(&svcpt->scp_lock);
 840                 rc = ptlrpc_lprocfs_svc_req_history_seek(svcpt, srhi,
 841                                 PTLRPC_REQ_POS2SEQ(svc, *pos));
 842                 spin_unlock(&svcpt->scp_lock);
 843                 if (rc == 0) {
 844                         *pos = PTLRPC_REQ_SEQ2POS(svc, srhi->srhi_seq);
 845                         srhi->srhi_idx = i;
 846                         return srhi;
 847                 }
 848         }
 849
 850         OBD_FREE(srhi, sizeof(*srhi));
 851         return NULL;
 852 }
 853
 854 static void
 855 ptlrpc_lprocfs_svc_req_history_stop(struct seq_file *s, void *iter)
 856 {
 857         struct ptlrpc_srh_iterator *srhi = iter;
 858
 859         if (srhi != NULL)
 860                 OBD_FREE(srhi, sizeof(*srhi));
 861 }
 862
 863 static void *
 864 ptlrpc_lprocfs_svc_req_history_next(struct seq_file *s,
 865                                     void *iter, loff_t *pos)
 866 {
 867         struct ptlrpc_service           *svc = s->private;
 868         struct ptlrpc_srh_iterator      *srhi = iter;
 869         struct ptlrpc_service_part      *svcpt;
 870         __u64                           seq;
 871         int                             rc;
 872         int                             i;
 873
 874         for (i = srhi->srhi_idx; i < svc->srv_ncpts; i++) {
 875                 svcpt = svc->srv_parts[i];
 876
 877                 if (i > srhi->srhi_idx) { /* reset iterator for a new CPT */
 878                         srhi->srhi_req = NULL;
 879                         seq = srhi->srhi_seq = 0;
 880                 } else { /* the next sequence */
 881                         seq = srhi->srhi_seq + (1 << svc->srv_cpt_bits);
 882                 }
 883
 884                 spin_lock(&svcpt->scp_lock);
 885                 rc = ptlrpc_lprocfs_svc_req_history_seek(svcpt, srhi, seq);
 886                 spin_unlock(&svcpt->scp_lock);
 887                 if (rc == 0) {
 888                         *pos = PTLRPC_REQ_SEQ2POS(svc, srhi->srhi_seq);
 889                         srhi->srhi_idx = i;
 890                         return srhi;
 891                 }
 892         }
 893
 894         OBD_FREE(srhi, sizeof(*srhi));
 895         return NULL;
 896 }
 897
 898 /* common ost/mdt so_req_printer */
 899 void target_print_req(void *seq_file, struct ptlrpc_request *req)
 900 {
 901         /* Called holding srv_lock with irqs disabled.
 902          * Print specific req contents and a newline.
 903          * CAVEAT EMPTOR: check request message length before printing!!!
 904          * You might have received any old crap so you must be just as
 905          * careful here as the service's request parser!!! */
 906         struct seq_file *sf = seq_file;
 907
 908         switch (req->rq_phase) {
 909         case RQ_PHASE_NEW:
 910                 /* still awaiting a service thread's attention, or rejected
 911                  * because the generic request message didn't unpack */
 912                 seq_printf(sf, "<not swabbed>\n");
 913                 break;
 914         case RQ_PHASE_INTERPRET:
 915                 /* being handled, so basic msg swabbed, and opc is valid
 916                  * but racing with mds_handle() */
 917         case RQ_PHASE_COMPLETE:
 918                 /* been handled by mds_handle() reply state possibly still
 919                  * volatile */
 920                 seq_printf(sf, "opc %d\n", lustre_msg_get_opc(req->rq_reqmsg));
 921                 break;
 922         default:
 923                 DEBUG_REQ(D_ERROR, req, "bad phase %d", req->rq_phase);
 924         }
 925 }
 926 EXPORT_SYMBOL(target_print_req);
 927
 928 static int ptlrpc_lprocfs_svc_req_history_show(struct seq_file *s, void *iter)
 929 {
 930         struct ptlrpc_service           *svc = s->private;
 931         struct ptlrpc_srh_iterator      *srhi = iter;
 932         struct ptlrpc_service_part      *svcpt;
 933         struct ptlrpc_request           *req;
 934         int                             rc;
 935
 936         LASSERT(srhi->srhi_idx < svc->srv_ncpts);
 937
 938         svcpt = svc->srv_parts[srhi->srhi_idx];
 939
 940         spin_lock(&svcpt->scp_lock);
 941
 942         rc = ptlrpc_lprocfs_svc_req_history_seek(svcpt, srhi, srhi->srhi_seq);
 943
 944         if (rc == 0) {
 945                 req = srhi->srhi_req;
 946
 947                 /* Print common req fields.
 948                  * CAVEAT EMPTOR: we're racing with the service handler
 949                  * here.  The request could contain any old crap, so you
 950                  * must be just as careful as the service's request
 951                  * parser. Currently I only print stuff here I know is OK
 952                  * to look at coz it was set up in request_in_callback()!!! */
 953                 seq_printf(s, "%lld:%s:%s:x%llu:%d:%s:%ld:%lds(%+lds) ",
 954                            req->rq_history_seq, libcfs_nid2str(req->rq_self),
 955                            libcfs_id2str(req->rq_peer), req->rq_xid,
 956                            req->rq_reqlen, ptlrpc_rqphase2str(req),
 957                            req->rq_arrival_time.tv_sec,
 958                            req->rq_sent - req->rq_arrival_time.tv_sec,
 959                            req->rq_sent - req->rq_deadline);
 960                 if (svc->srv_ops.so_req_printer == NULL)
 961                         seq_printf(s, "\n");
 962                 else
 963                         svc->srv_ops.so_req_printer(s, srhi->srhi_req);
 964         }
 965
 966         spin_unlock(&svcpt->scp_lock);
 967         return rc;
 968 }
 969
 970 static int
 971 ptlrpc_lprocfs_svc_req_history_open(struct inode *inode, struct file *file)
 972 {
 973         static struct seq_operations sops = {
 974                 .start = ptlrpc_lprocfs_svc_req_history_start,
 975                 .stop  = ptlrpc_lprocfs_svc_req_history_stop,
 976                 .next  = ptlrpc_lprocfs_svc_req_history_next,
 977                 .show  = ptlrpc_lprocfs_svc_req_history_show,
 978         };
 979         struct seq_file       *seqf;
 980         int                 rc;
 981
 982         rc = seq_open(file, &sops);
 983         if (rc)
 984                 return rc;
 985
 986         seqf = file->private_data;
 987         seqf->private = PDE_DATA(inode);
 988         return 0;
 989 }
 990
 991 /* See also lprocfs_rd_timeouts */
 992 static int ptlrpc_lprocfs_timeouts_seq_show(struct seq_file *m, void *n)
 993 {
 994         struct ptlrpc_service           *svc = m->private;
 995         struct ptlrpc_service_part      *svcpt;
 996         struct dhms                     ts;
 997         time_t                          worstt;
 998         unsigned int                    cur;
 999         unsigned int                    worst;
1000         int                             i;
1001
1002         if (AT_OFF) {
1003                 seq_printf(m, "adaptive timeouts off, using obd_timeout %u\n",
1004                                obd_timeout);
1005                 return 0;
1006         }
1007
1008         ptlrpc_service_for_each_part(svcpt, i, svc) {
1009                 cur     = at_get(&svcpt->scp_at_estimate);
1010                 worst   = svcpt->scp_at_estimate.at_worst_ever;
1011                 worstt  = svcpt->scp_at_estimate.at_worst_time;
1012                 s2dhms(&ts, get_seconds() - worstt);
1013
1014                 seq_printf(m, "%10s : cur %3u  worst %3u (at %ld, "
1015                               DHMS_FMT" ago) ", "service",
1016                               cur, worst, worstt, DHMS_VARS(&ts));
1017
1018                 lprocfs_at_hist_helper(m, &svcpt->scp_at_estimate);
1019         }
1020
1021         return 0;
1022 }
1023 LPROC_SEQ_FOPS_RO(ptlrpc_lprocfs_timeouts);
1024
1025 static int ptlrpc_lprocfs_hp_ratio_seq_show(struct seq_file *m, void *v)
1026 {
1027         struct ptlrpc_service *svc = m->private;
1028         return seq_printf(m, "%d", svc->srv_hpreq_ratio);
1029 }
1030
1031 static ssize_t ptlrpc_lprocfs_hp_ratio_seq_write(struct file *file,
1032                                              const char __user *buffer,
1033                                              size_t count,
1034                                              loff_t *off)
1035 {
1036         struct ptlrpc_service *svc = ((struct seq_file *)file->private_data)->private;
1037         int     rc;
1038         int     val;
1039
1040         rc = lprocfs_write_helper(buffer, count, &val);
1041         if (rc < 0)
1042                 return rc;
1043
1044         if (val < 0)
1045                 return -ERANGE;
1046
1047         spin_lock(&svc->srv_lock);
1048         svc->srv_hpreq_ratio = val;
1049         spin_unlock(&svc->srv_lock);
1050
1051         return count;
1052 }
1053 LPROC_SEQ_FOPS(ptlrpc_lprocfs_hp_ratio);
1054
1055 void ptlrpc_lprocfs_register_service(struct proc_dir_entry *entry,
1056                                      struct ptlrpc_service *svc)
1057 {
1058         struct lprocfs_vars lproc_vars[] = {
1059                 {.name       = "high_priority_ratio",
1060                  .fops       = &ptlrpc_lprocfs_hp_ratio_fops,
1061                  .data       = svc},
1062                 {.name       = "req_buffer_history_len",
1063                  .fops       = &ptlrpc_lprocfs_req_history_len_fops,
1064                  .data       = svc},
1065                 {.name       = "req_buffer_history_max",
1066                  .fops       = &ptlrpc_lprocfs_req_history_max_fops,
1067                  .data       = svc},
1068                 {.name       = "threads_min",
1069                  .fops       = &ptlrpc_lprocfs_threads_min_fops,
1070                  .data       = svc},
1071                 {.name       = "threads_max",
1072                  .fops       = &ptlrpc_lprocfs_threads_max_fops,
1073                  .data       = svc},
1074                 {.name       = "threads_started",
1075                  .fops       = &ptlrpc_lprocfs_threads_started_fops,
1076                  .data       = svc},
1077                 {.name       = "timeouts",
1078                  .fops       = &ptlrpc_lprocfs_timeouts_fops,
1079                  .data       = svc},
1080                 {.name       = "nrs_policies",
1081                  .fops       = &ptlrpc_lprocfs_nrs_fops,
1082                  .data       = svc},
1083                 {NULL}
1084         };
1085         static struct file_operations req_history_fops = {
1086                 .owner       = THIS_MODULE,
1087                 .open   = ptlrpc_lprocfs_svc_req_history_open,
1088                 .read   = seq_read,
1089                 .llseek      = seq_lseek,
1090                 .release     = lprocfs_seq_release,
1091         };
1092
1093         int rc;
1094
1095         ptlrpc_lprocfs_register(entry, svc->srv_name,
1096                                 "stats", &svc->srv_procroot,
1097                                 &svc->srv_stats);
1098
1099         if (svc->srv_procroot == NULL)
1100                 return;
1101
1102         lprocfs_add_vars(svc->srv_procroot, lproc_vars, NULL);
1103
1104         rc = lprocfs_seq_create(svc->srv_procroot, "req_history",
1105                                 0400, &req_history_fops, svc);
1106         if (rc)
1107                 CWARN("Error adding the req_history file\n");
1108 }
1109
1110 void ptlrpc_lprocfs_register_obd(struct obd_device *obddev)
1111 {
1112         ptlrpc_lprocfs_register(obddev->obd_proc_entry, NULL, "stats",
1113                                 &obddev->obd_svc_procroot,
1114                                 &obddev->obd_svc_stats);
1115 }
1116 EXPORT_SYMBOL(ptlrpc_lprocfs_register_obd);
1117
1118 void ptlrpc_lprocfs_rpc_sent(struct ptlrpc_request *req, long amount)
1119 {
1120         struct lprocfs_stats *svc_stats;
1121         __u32 op = lustre_msg_get_opc(req->rq_reqmsg);
1122         int opc = opcode_offset(op);
1123
1124         svc_stats = req->rq_import->imp_obd->obd_svc_stats;
1125         if (svc_stats == NULL || opc <= 0)
1126                 return;
1127         LASSERT(opc < LUSTRE_MAX_OPCODES);
1128         if (!(op == LDLM_ENQUEUE || op == MDS_REINT))
1129                 lprocfs_counter_add(svc_stats, opc + EXTRA_MAX_OPCODES, amount);
1130 }
1131
1132 void ptlrpc_lprocfs_brw(struct ptlrpc_request *req, int bytes)
1133 {
1134         struct lprocfs_stats *svc_stats;
1135         int idx;
1136
1137         if (!req->rq_import)
1138                 return;
1139         svc_stats = req->rq_import->imp_obd->obd_svc_stats;
1140         if (!svc_stats)
1141                 return;
1142         idx = lustre_msg_get_opc(req->rq_reqmsg);
1143         switch (idx) {
1144         case OST_READ:
1145                 idx = BRW_READ_BYTES + PTLRPC_LAST_CNTR;
1146                 break;
1147         case OST_WRITE:
1148                 idx = BRW_WRITE_BYTES + PTLRPC_LAST_CNTR;
1149                 break;
1150         default:
1151                 LASSERTF(0, "unsupported opcode %u\n", idx);
1152                 break;
1153         }
1154
1155         lprocfs_counter_add(svc_stats, idx, bytes);
1156 }
1157
1158 EXPORT_SYMBOL(ptlrpc_lprocfs_brw);
1159
1160 void ptlrpc_lprocfs_unregister_service(struct ptlrpc_service *svc)
1161 {
1162         if (svc->srv_procroot != NULL)
1163                 lprocfs_remove(&svc->srv_procroot);
1164
1165         if (svc->srv_stats)
1166                 lprocfs_free_stats(&svc->srv_stats);
1167 }
1168
1169 void ptlrpc_lprocfs_unregister_obd(struct obd_device *obd)
1170 {
1171         if (obd->obd_svc_procroot)
1172                 lprocfs_remove(&obd->obd_svc_procroot);
1173
1174         if (obd->obd_svc_stats)
1175                 lprocfs_free_stats(&obd->obd_svc_stats);
1176 }
1177 EXPORT_SYMBOL(ptlrpc_lprocfs_unregister_obd);
1178
1179
1180 #define BUFLEN (UUID_MAX + 5)
1181
1182 int lprocfs_wr_evict_client(struct file *file, const char __user *buffer,
1183                             size_t count, loff_t *off)
1184 {
1185         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
1186         char          *kbuf;
1187         char          *tmpbuf;
1188
1189         OBD_ALLOC(kbuf, BUFLEN);
1190         if (kbuf == NULL)
1191                 return -ENOMEM;
1192
1193         /*
1194          * OBD_ALLOC() will zero kbuf, but we only copy BUFLEN - 1
1195          * bytes into kbuf, to ensure that the string is NUL-terminated.
1196          * UUID_MAX should include a trailing NUL already.
1197          */
1198         if (copy_from_user(kbuf, buffer,
1199                                min_t(unsigned long, BUFLEN - 1, count))) {
1200                 count = -EFAULT;
1201                 goto out;
1202         }
1203         tmpbuf = cfs_firststr(kbuf, min_t(unsigned long, BUFLEN - 1, count));
1204         /* Kludge code(deadlock situation): the lprocfs lock has been held
1205          * since the client is evicted by writing client's
1206          * uuid/nid to procfs "evict_client" entry. However,
1207          * obd_export_evict_by_uuid() will call lprocfs_remove() to destroy
1208          * the proc entries under the being destroyed export{}, so I have
1209          * to drop the lock at first here.
1210          * - jay, jxiong@clusterfs.com */
1211         class_incref(obd, __func__, current);
1212
1213         if (strncmp(tmpbuf, "nid:", 4) == 0)
1214                 obd_export_evict_by_nid(obd, tmpbuf + 4);
1215         else if (strncmp(tmpbuf, "uuid:", 5) == 0)
1216                 obd_export_evict_by_uuid(obd, tmpbuf + 5);
1217         else
1218                 obd_export_evict_by_uuid(obd, tmpbuf);
1219
1220         class_decref(obd, __func__, current);
1221
1222 out:
1223         OBD_FREE(kbuf, BUFLEN);
1224         return count;
1225 }
1226 EXPORT_SYMBOL(lprocfs_wr_evict_client);
1227
1228 #undef BUFLEN
1229
1230 int lprocfs_wr_ping(struct file *file, const char __user *buffer,
1231                     size_t count, loff_t *off)
1232 {
1233         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
1234         struct ptlrpc_request *req;
1235         int                 rc;
1236
1237         LPROCFS_CLIMP_CHECK(obd);
1238         req = ptlrpc_prep_ping(obd->u.cli.cl_import);
1239         LPROCFS_CLIMP_EXIT(obd);
1240         if (req == NULL)
1241                 return -ENOMEM;
1242
1243         req->rq_send_state = LUSTRE_IMP_FULL;
1244
1245         rc = ptlrpc_queue_wait(req);
1246
1247         ptlrpc_req_finished(req);
1248         if (rc >= 0)
1249                 return count;
1250         return rc;
1251 }
1252 EXPORT_SYMBOL(lprocfs_wr_ping);
1253
1254 /* Write the connection UUID to this file to attempt to connect to that node.
1255  * The connection UUID is a node's primary NID. For example,
1256  * "echo connection=192.168.0.1@tcp0::instance > .../import".
1257  */
1258 int lprocfs_wr_import(struct file *file, const char __user *buffer,
1259                       size_t count, loff_t *off)
1260 {
1261         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
1262         struct obd_import *imp = obd->u.cli.cl_import;
1263         char *kbuf = NULL;
1264         char *uuid;
1265         char *ptr;
1266         int do_reconn = 1;
1267         const char prefix[] = "connection=";
1268         const int prefix_len = sizeof(prefix) - 1;
1269
1270         if (count > PAGE_CACHE_SIZE - 1 || count <= prefix_len)
1271                 return -EINVAL;
1272
1273         OBD_ALLOC(kbuf, count + 1);
1274         if (kbuf == NULL)
1275                 return -ENOMEM;
1276
1277         if (copy_from_user(kbuf, buffer, count)) {
1278                 count = -EFAULT;
1279                 goto out;
1280         }
1281
1282         kbuf[count] = 0;
1283
1284         /* only support connection=uuid::instance now */
1285         if (strncmp(prefix, kbuf, prefix_len) != 0) {
1286                 count = -EINVAL;
1287                 goto out;
1288         }
1289
1290         uuid = kbuf + prefix_len;
1291         ptr = strstr(uuid, "::");
1292         if (ptr) {
1293                 __u32 inst;
1294                 char *endptr;
1295
1296                 *ptr = 0;
1297                 do_reconn = 0;
1298                 ptr += strlen("::");
1299                 inst = simple_strtol(ptr, &endptr, 10);
1300                 if (*endptr) {
1301                         CERROR("config: wrong instance # %s\n", ptr);
1302                 } else if (inst != imp->imp_connect_data.ocd_instance) {
1303                         CDEBUG(D_INFO, "IR: %s is connecting to an obsoleted target(%u/%u), reconnecting...\n",
1304                                imp->imp_obd->obd_name,
1305                                imp->imp_connect_data.ocd_instance, inst);
1306                         do_reconn = 1;
1307                 } else {
1308                         CDEBUG(D_INFO, "IR: %s has already been connecting to new target(%u)\n",
1309                                imp->imp_obd->obd_name, inst);
1310                 }
1311         }
1312
1313         if (do_reconn)
1314                 ptlrpc_recover_import(imp, uuid, 1);
1315
1316 out:
1317         OBD_FREE(kbuf, count + 1);
1318         return count;
1319 }
1320 EXPORT_SYMBOL(lprocfs_wr_import);
1321
1322 int lprocfs_rd_pinger_recov(struct seq_file *m, void *n)
1323 {
1324         struct obd_device *obd = m->private;
1325         struct obd_import *imp = obd->u.cli.cl_import;
1326         int rc;
1327
1328         LPROCFS_CLIMP_CHECK(obd);
1329         rc = seq_printf(m, "%d\n", !imp->imp_no_pinger_recover);
1330         LPROCFS_CLIMP_EXIT(obd);
1331
1332         return rc;
1333 }
1334 EXPORT_SYMBOL(lprocfs_rd_pinger_recov);
1335
1336 int lprocfs_wr_pinger_recov(struct file *file, const char __user *buffer,
1337                       size_t count, loff_t *off)
1338 {
1339         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
1340         struct client_obd *cli = &obd->u.cli;
1341         struct obd_import *imp = cli->cl_import;
1342         int rc, val;
1343
1344         rc = lprocfs_write_helper(buffer, count, &val);
1345         if (rc < 0)
1346                 return rc;
1347
1348         if (val != 0 && val != 1)
1349                 return -ERANGE;
1350
1351         LPROCFS_CLIMP_CHECK(obd);
1352         spin_lock(&imp->imp_lock);
1353         imp->imp_no_pinger_recover = !val;
1354         spin_unlock(&imp->imp_lock);
1355         LPROCFS_CLIMP_EXIT(obd);
1356
1357         return count;
1358
1359 }
1360 EXPORT_SYMBOL(lprocfs_wr_pinger_recov);
1361
1362 #endif /* CONFIG_PROC_FS */