drivers/staging/lustre/lustre/obdclass/lprocfs_status.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  * lustre/obdclass/lprocfs_status.c
  37  *
  38  * Author: Hariharan Thantry <thantry@users.sourceforge.net>
  39  */
  40
  41 #define DEBUG_SUBSYSTEM S_CLASS
  42
  43
  44 #include "../include/obd_class.h"
  45 #include "../include/lprocfs_status.h"
  46 #include "../include/lustre/lustre_idl.h"
  47 #include <linux/seq_file.h>
  48
  49 static const char * const obd_connect_names[] = {
  50         "read_only",
  51         "lov_index",
  52         "unused",
  53         "write_grant",
  54         "server_lock",
  55         "version",
  56         "request_portal",
  57         "acl",
  58         "xattr",
  59         "create_on_write",
  60         "truncate_lock",
  61         "initial_transno",
  62         "inode_bit_locks",
  63         "join_file(obsolete)",
  64         "getattr_by_fid",
  65         "no_oh_for_devices",
  66         "remote_client",
  67         "remote_client_by_force",
  68         "max_byte_per_rpc",
  69         "64bit_qdata",
  70         "mds_capability",
  71         "oss_capability",
  72         "early_lock_cancel",
  73         "som",
  74         "adaptive_timeouts",
  75         "lru_resize",
  76         "mds_mds_connection",
  77         "real_conn",
  78         "change_qunit_size",
  79         "alt_checksum_algorithm",
  80         "fid_is_enabled",
  81         "version_recovery",
  82         "pools",
  83         "grant_shrink",
  84         "skip_orphan",
  85         "large_ea",
  86         "full20",
  87         "layout_lock",
  88         "64bithash",
  89         "object_max_bytes",
  90         "imp_recov",
  91         "jobstats",
  92         "umask",
  93         "einprogress",
  94         "grant_param",
  95         "flock_owner",
  96         "lvb_type",
  97         "nanoseconds_times",
  98         "lightweight_conn",
  99         "short_io",
 100         "pingless",
 101         "flock_deadlock",
 102         "disp_stripe",
 103         "unknown",
 104         NULL
 105 };
 106
 107 int obd_connect_flags2str(char *page, int count, __u64 flags, char *sep)
 108 {
 109         __u64 mask = 1;
 110         int i, ret = 0;
 111
 112         for (i = 0; obd_connect_names[i] != NULL; i++, mask <<= 1) {
 113                 if (flags & mask)
 114                         ret += snprintf(page + ret, count - ret, "%s%s",
 115                                         ret ? sep : "", obd_connect_names[i]);
 116         }
 117         if (flags & ~(mask - 1))
 118                 ret += snprintf(page + ret, count - ret,
 119                                 "%sunknown flags %#llx",
 120                                 ret ? sep : "", flags & ~(mask - 1));
 121         return ret;
 122 }
 123 EXPORT_SYMBOL(obd_connect_flags2str);
 124
 125 int lprocfs_read_frac_helper(char *buffer, unsigned long count, long val,
 126                              int mult)
 127 {
 128         long decimal_val, frac_val;
 129         int prtn;
 130
 131         if (count < 10)
 132                 return -EINVAL;
 133
 134         decimal_val = val / mult;
 135         prtn = snprintf(buffer, count, "%ld", decimal_val);
 136         frac_val = val % mult;
 137
 138         if (prtn < (count - 4) && frac_val > 0) {
 139                 long temp_frac;
 140                 int i, temp_mult = 1, frac_bits = 0;
 141
 142                 temp_frac = frac_val * 10;
 143                 buffer[prtn++] = '.';
 144                 while (frac_bits < 2 && (temp_frac / mult) < 1) {
 145                         /* only reserved 2 bits fraction */
 146                         buffer[prtn++] = '0';
 147                         temp_frac *= 10;
 148                         frac_bits++;
 149                 }
 150                 /*
 151                  * Need to think these cases :
 152                  *      1. #echo x.00 > /proc/xxx       output result : x
 153                  *      2. #echo x.0x > /proc/xxx       output result : x.0x
 154                  *      3. #echo x.x0 > /proc/xxx       output result : x.x
 155                  *      4. #echo x.xx > /proc/xxx       output result : x.xx
 156                  *      Only reserved 2 bits fraction.
 157                  */
 158                 for (i = 0; i < (5 - prtn); i++)
 159                         temp_mult *= 10;
 160
 161                 frac_bits = min((int)count - prtn, 3 - frac_bits);
 162                 prtn += snprintf(buffer + prtn, frac_bits, "%ld",
 163                                  frac_val * temp_mult / mult);
 164
 165                 prtn--;
 166                 while (buffer[prtn] < '1' || buffer[prtn] > '9') {
 167                         prtn--;
 168                         if (buffer[prtn] == '.') {
 169                                 prtn--;
 170                                 break;
 171                         }
 172                 }
 173                 prtn++;
 174         }
 175         buffer[prtn++] = '\n';
 176         return prtn;
 177 }
 178 EXPORT_SYMBOL(lprocfs_read_frac_helper);
 179
 180 int lprocfs_write_frac_helper(const char __user *buffer, unsigned long count,
 181                               int *val, int mult)
 182 {
 183         char kernbuf[20], *end, *pbuf;
 184
 185         if (count > (sizeof(kernbuf) - 1))
 186                 return -EINVAL;
 187
 188         if (copy_from_user(kernbuf, buffer, count))
 189                 return -EFAULT;
 190
 191         kernbuf[count] = '\0';
 192         pbuf = kernbuf;
 193         if (*pbuf == '-') {
 194                 mult = -mult;
 195                 pbuf++;
 196         }
 197
 198         *val = (int)simple_strtoul(pbuf, &end, 10) * mult;
 199         if (pbuf == end)
 200                 return -EINVAL;
 201
 202         if (end != NULL && *end == '.') {
 203                 int temp_val, pow = 1;
 204                 int i;
 205
 206                 pbuf = end + 1;
 207                 if (strlen(pbuf) > 5)
 208                         pbuf[5] = '\0'; /*only allow 5bits fractional*/
 209
 210                 temp_val = (int)simple_strtoul(pbuf, &end, 10) * mult;
 211
 212                 if (pbuf < end) {
 213                         for (i = 0; i < (end - pbuf); i++)
 214                                 pow *= 10;
 215
 216                         *val += temp_val / pow;
 217                 }
 218         }
 219         return 0;
 220 }
 221 EXPORT_SYMBOL(lprocfs_write_frac_helper);
 222
 223 #if defined (CONFIG_PROC_FS)
 224
 225 static int lprocfs_no_percpu_stats = 0;
 226 module_param(lprocfs_no_percpu_stats, int, 0644);
 227 MODULE_PARM_DESC(lprocfs_no_percpu_stats, "Do not alloc percpu data for lprocfs stats");
 228
 229 #define MAX_STRING_SIZE 128
 230
 231 int lprocfs_single_release(struct inode *inode, struct file *file)
 232 {
 233         return single_release(inode, file);
 234 }
 235 EXPORT_SYMBOL(lprocfs_single_release);
 236
 237 int lprocfs_seq_release(struct inode *inode, struct file *file)
 238 {
 239         return seq_release(inode, file);
 240 }
 241 EXPORT_SYMBOL(lprocfs_seq_release);
 242
 243 /* lprocfs API calls */
 244
 245 struct proc_dir_entry *lprocfs_add_simple(struct proc_dir_entry *root,
 246                                      char *name, void *data,
 247                                      struct file_operations *fops)
 248 {
 249         struct proc_dir_entry *proc;
 250         umode_t mode = 0;
 251
 252         if (root == NULL || name == NULL || fops == NULL)
 253                 return ERR_PTR(-EINVAL);
 254
 255         if (fops->read)
 256                 mode = 0444;
 257         if (fops->write)
 258                 mode |= 0200;
 259         proc = proc_create_data(name, mode, root, fops, data);
 260         if (!proc) {
 261                 CERROR("LprocFS: No memory to create /proc entry %s", name);
 262                 return ERR_PTR(-ENOMEM);
 263         }
 264         return proc;
 265 }
 266 EXPORT_SYMBOL(lprocfs_add_simple);
 267
 268 struct proc_dir_entry *lprocfs_add_symlink(const char *name,
 269                         struct proc_dir_entry *parent, const char *format, ...)
 270 {
 271         struct proc_dir_entry *entry;
 272         char *dest;
 273         va_list ap;
 274
 275         if (parent == NULL || format == NULL)
 276                 return NULL;
 277
 278         OBD_ALLOC_WAIT(dest, MAX_STRING_SIZE + 1);
 279         if (dest == NULL)
 280                 return NULL;
 281
 282         va_start(ap, format);
 283         vsnprintf(dest, MAX_STRING_SIZE, format, ap);
 284         va_end(ap);
 285
 286         entry = proc_symlink(name, parent, dest);
 287         if (entry == NULL)
 288                 CERROR("LprocFS: Could not create symbolic link from %s to %s",
 289                         name, dest);
 290
 291         OBD_FREE(dest, MAX_STRING_SIZE + 1);
 292         return entry;
 293 }
 294 EXPORT_SYMBOL(lprocfs_add_symlink);
 295
 296 static struct file_operations lprocfs_generic_fops = { };
 297
 298 /**
 299  * Add /proc entries.
 300  *
 301  * \param root [in]  The parent proc entry on which new entry will be added.
 302  * \param list [in]  Array of proc entries to be added.
 303  * \param data [in]  The argument to be passed when entries read/write routines
 304  *                 are called through /proc file.
 305  *
 306  * \retval 0   on success
 307  *       < 0 on error
 308  */
 309 int lprocfs_add_vars(struct proc_dir_entry *root, struct lprocfs_vars *list,
 310                      void *data)
 311 {
 312         if (root == NULL || list == NULL)
 313                 return -EINVAL;
 314
 315         while (list->name != NULL) {
 316                 struct proc_dir_entry *proc;
 317                 umode_t mode = 0;
 318
 319                 if (list->proc_mode != 0000) {
 320                         mode = list->proc_mode;
 321                 } else if (list->fops) {
 322                         if (list->fops->read)
 323                                 mode = 0444;
 324                         if (list->fops->write)
 325                                 mode |= 0200;
 326                 }
 327                 proc = proc_create_data(list->name, mode, root,
 328                                         list->fops ?: &lprocfs_generic_fops,
 329                                         list->data ?: data);
 330                 if (proc == NULL)
 331                         return -ENOMEM;
 332                 list++;
 333         }
 334         return 0;
 335 }
 336 EXPORT_SYMBOL(lprocfs_add_vars);
 337
 338 void lprocfs_remove(struct proc_dir_entry **rooth)
 339 {
 340         proc_remove(*rooth);
 341         *rooth = NULL;
 342 }
 343 EXPORT_SYMBOL(lprocfs_remove);
 344
 345 void lprocfs_remove_proc_entry(const char *name, struct proc_dir_entry *parent)
 346 {
 347         LASSERT(parent != NULL);
 348         remove_proc_entry(name, parent);
 349 }
 350 EXPORT_SYMBOL(lprocfs_remove_proc_entry);
 351
 352 struct proc_dir_entry *lprocfs_register(const char *name,
 353                                         struct proc_dir_entry *parent,
 354                                         struct lprocfs_vars *list, void *data)
 355 {
 356         struct proc_dir_entry *entry;
 357
 358         entry = proc_mkdir(name, parent);
 359         if (entry == NULL) {
 360                 entry = ERR_PTR(-ENOMEM);
 361                 goto out;
 362         }
 363
 364         if (list != NULL) {
 365                 int rc = lprocfs_add_vars(entry, list, data);
 366                 if (rc != 0) {
 367                         lprocfs_remove(&entry);
 368                         entry = ERR_PTR(rc);
 369                 }
 370         }
 371 out:
 372         return entry;
 373 }
 374 EXPORT_SYMBOL(lprocfs_register);
 375
 376 /* Generic callbacks */
 377 int lprocfs_rd_uint(struct seq_file *m, void *data)
 378 {
 379         return seq_printf(m, "%u\n", *(unsigned int *)data);
 380 }
 381 EXPORT_SYMBOL(lprocfs_rd_uint);
 382
 383 int lprocfs_wr_uint(struct file *file, const char __user *buffer,
 384                     unsigned long count, void *data)
 385 {
 386         unsigned *p = data;
 387         char dummy[MAX_STRING_SIZE + 1], *end;
 388         unsigned long tmp;
 389
 390         dummy[MAX_STRING_SIZE] = '\0';
 391         if (copy_from_user(dummy, buffer, MAX_STRING_SIZE))
 392                 return -EFAULT;
 393
 394         tmp = simple_strtoul(dummy, &end, 0);
 395         if (dummy == end)
 396                 return -EINVAL;
 397
 398         *p = (unsigned int)tmp;
 399         return count;
 400 }
 401 EXPORT_SYMBOL(lprocfs_wr_uint);
 402
 403 int lprocfs_rd_u64(struct seq_file *m, void *data)
 404 {
 405         return seq_printf(m, "%llu\n", *(__u64 *)data);
 406 }
 407 EXPORT_SYMBOL(lprocfs_rd_u64);
 408
 409 int lprocfs_rd_atomic(struct seq_file *m, void *data)
 410 {
 411         atomic_t *atom = data;
 412         LASSERT(atom != NULL);
 413         return seq_printf(m, "%d\n", atomic_read(atom));
 414 }
 415 EXPORT_SYMBOL(lprocfs_rd_atomic);
 416
 417 int lprocfs_wr_atomic(struct file *file, const char __user *buffer,
 418                       unsigned long count, void *data)
 419 {
 420         atomic_t *atm = data;
 421         int val = 0;
 422         int rc;
 423
 424         rc = lprocfs_write_helper(buffer, count, &val);
 425         if (rc < 0)
 426                 return rc;
 427
 428         if (val <= 0)
 429                 return -ERANGE;
 430
 431         atomic_set(atm, val);
 432         return count;
 433 }
 434 EXPORT_SYMBOL(lprocfs_wr_atomic);
 435
 436 int lprocfs_rd_uuid(struct seq_file *m, void *data)
 437 {
 438         struct obd_device *obd = data;
 439
 440         LASSERT(obd != NULL);
 441         return seq_printf(m, "%s\n", obd->obd_uuid.uuid);
 442 }
 443 EXPORT_SYMBOL(lprocfs_rd_uuid);
 444
 445 int lprocfs_rd_name(struct seq_file *m, void *data)
 446 {
 447         struct obd_device *dev = data;
 448
 449         LASSERT(dev != NULL);
 450         return seq_printf(m, "%s\n", dev->obd_name);
 451 }
 452 EXPORT_SYMBOL(lprocfs_rd_name);
 453
 454 int lprocfs_rd_blksize(struct seq_file *m, void *data)
 455 {
 456         struct obd_device *obd = data;
 457         struct obd_statfs  osfs;
 458         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 459                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 460                             OBD_STATFS_NODELAY);
 461         if (!rc)
 462                 rc = seq_printf(m, "%u\n", osfs.os_bsize);
 463         return rc;
 464 }
 465 EXPORT_SYMBOL(lprocfs_rd_blksize);
 466
 467 int lprocfs_rd_kbytestotal(struct seq_file *m, void *data)
 468 {
 469         struct obd_device *obd = data;
 470         struct obd_statfs  osfs;
 471         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 472                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 473                             OBD_STATFS_NODELAY);
 474         if (!rc) {
 475                 __u32 blk_size = osfs.os_bsize >> 10;
 476                 __u64 result = osfs.os_blocks;
 477
 478                 while (blk_size >>= 1)
 479                         result <<= 1;
 480
 481                 rc = seq_printf(m, "%llu\n", result);
 482         }
 483         return rc;
 484 }
 485 EXPORT_SYMBOL(lprocfs_rd_kbytestotal);
 486
 487 int lprocfs_rd_kbytesfree(struct seq_file *m, void *data)
 488 {
 489         struct obd_device *obd = data;
 490         struct obd_statfs  osfs;
 491         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 492                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 493                             OBD_STATFS_NODELAY);
 494         if (!rc) {
 495                 __u32 blk_size = osfs.os_bsize >> 10;
 496                 __u64 result = osfs.os_bfree;
 497
 498                 while (blk_size >>= 1)
 499                         result <<= 1;
 500
 501                 rc = seq_printf(m, "%llu\n", result);
 502         }
 503         return rc;
 504 }
 505 EXPORT_SYMBOL(lprocfs_rd_kbytesfree);
 506
 507 int lprocfs_rd_kbytesavail(struct seq_file *m, void *data)
 508 {
 509         struct obd_device *obd = data;
 510         struct obd_statfs  osfs;
 511         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 512                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 513                             OBD_STATFS_NODELAY);
 514         if (!rc) {
 515                 __u32 blk_size = osfs.os_bsize >> 10;
 516                 __u64 result = osfs.os_bavail;
 517
 518                 while (blk_size >>= 1)
 519                         result <<= 1;
 520
 521                 rc = seq_printf(m, "%llu\n", result);
 522         }
 523         return rc;
 524 }
 525 EXPORT_SYMBOL(lprocfs_rd_kbytesavail);
 526
 527 int lprocfs_rd_filestotal(struct seq_file *m, void *data)
 528 {
 529         struct obd_device *obd = data;
 530         struct obd_statfs  osfs;
 531         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 532                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 533                             OBD_STATFS_NODELAY);
 534         if (!rc)
 535                 rc = seq_printf(m, "%llu\n", osfs.os_files);
 536
 537         return rc;
 538 }
 539 EXPORT_SYMBOL(lprocfs_rd_filestotal);
 540
 541 int lprocfs_rd_filesfree(struct seq_file *m, void *data)
 542 {
 543         struct obd_device *obd = data;
 544         struct obd_statfs  osfs;
 545         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 546                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 547                             OBD_STATFS_NODELAY);
 548         if (!rc)
 549                 rc = seq_printf(m, "%llu\n", osfs.os_ffree);
 550         return rc;
 551 }
 552 EXPORT_SYMBOL(lprocfs_rd_filesfree);
 553
 554 int lprocfs_rd_server_uuid(struct seq_file *m, void *data)
 555 {
 556         struct obd_device *obd = data;
 557         struct obd_import *imp;
 558         char *imp_state_name = NULL;
 559         int rc = 0;
 560
 561         LASSERT(obd != NULL);
 562         LPROCFS_CLIMP_CHECK(obd);
 563         imp = obd->u.cli.cl_import;
 564         imp_state_name = ptlrpc_import_state_name(imp->imp_state);
 565         rc = seq_printf(m, "%s\t%s%s\n", obd2cli_tgt(obd), imp_state_name,
 566                         imp->imp_deactive ? "\tDEACTIVATED" : "");
 567
 568         LPROCFS_CLIMP_EXIT(obd);
 569         return rc;
 570 }
 571 EXPORT_SYMBOL(lprocfs_rd_server_uuid);
 572
 573 int lprocfs_rd_conn_uuid(struct seq_file *m, void *data)
 574 {
 575         struct obd_device *obd = data;
 576         struct ptlrpc_connection *conn;
 577         int rc = 0;
 578
 579         LASSERT(obd != NULL);
 580
 581         LPROCFS_CLIMP_CHECK(obd);
 582         conn = obd->u.cli.cl_import->imp_connection;
 583         if (conn && obd->u.cli.cl_import)
 584                 rc = seq_printf(m, "%s\n", conn->c_remote_uuid.uuid);
 585         else
 586                 rc = seq_printf(m, "%s\n", "<none>");
 587
 588         LPROCFS_CLIMP_EXIT(obd);
 589         return rc;
 590 }
 591 EXPORT_SYMBOL(lprocfs_rd_conn_uuid);
 592
 593 /** add up per-cpu counters */
 594 void lprocfs_stats_collect(struct lprocfs_stats *stats, int idx,
 595                            struct lprocfs_counter *cnt)
 596 {
 597         unsigned int                    num_entry;
 598         struct lprocfs_counter          *percpu_cntr;
 599         int                             i;
 600         unsigned long                   flags = 0;
 601
 602         memset(cnt, 0, sizeof(*cnt));
 603
 604         if (stats == NULL) {
 605                 /* set count to 1 to avoid divide-by-zero errs in callers */
 606                 cnt->lc_count = 1;
 607                 return;
 608         }
 609
 610         cnt->lc_min = LC_MIN_INIT;
 611
 612         num_entry = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
 613
 614         for (i = 0; i < num_entry; i++) {
 615                 if (stats->ls_percpu[i] == NULL)
 616                         continue;
 617                 percpu_cntr = lprocfs_stats_counter_get(stats, i, idx);
 618
 619                 cnt->lc_count += percpu_cntr->lc_count;
 620                 cnt->lc_sum += percpu_cntr->lc_sum;
 621                 if (percpu_cntr->lc_min < cnt->lc_min)
 622                         cnt->lc_min = percpu_cntr->lc_min;
 623                 if (percpu_cntr->lc_max > cnt->lc_max)
 624                         cnt->lc_max = percpu_cntr->lc_max;
 625                 cnt->lc_sumsquare += percpu_cntr->lc_sumsquare;
 626         }
 627
 628         lprocfs_stats_unlock(stats, LPROCFS_GET_NUM_CPU, &flags);
 629 }
 630 EXPORT_SYMBOL(lprocfs_stats_collect);
 631
 632 /**
 633  * Append a space separated list of current set flags to str.
 634  */
 635 #define flag2str(flag, first)                                           \
 636         do {                                                            \
 637                 if (imp->imp_##flag)                                    \
 638                      seq_printf(m, "%s" #flag, first ? "" : ", ");      \
 639         } while (0)
 640 static int obd_import_flags2str(struct obd_import *imp, struct seq_file *m)
 641 {
 642         bool first = true;
 643
 644         if (imp->imp_obd->obd_no_recov) {
 645                 seq_printf(m, "no_recov");
 646                 first = false;
 647         }
 648
 649         flag2str(invalid, first);
 650         first = false;
 651         flag2str(deactive, first);
 652         flag2str(replayable, first);
 653         flag2str(pingable, first);
 654         return 0;
 655 }
 656 #undef flags2str
 657
 658 static void obd_connect_seq_flags2str(struct seq_file *m, __u64 flags, char *sep)
 659 {
 660         __u64 mask = 1;
 661         int i;
 662         bool first = true;
 663
 664         for (i = 0; obd_connect_names[i] != NULL; i++, mask <<= 1) {
 665                 if (flags & mask) {
 666                         seq_printf(m, "%s%s",
 667                                         first ? sep : "", obd_connect_names[i]);
 668                         first = false;
 669                 }
 670         }
 671         if (flags & ~(mask - 1))
 672                 seq_printf(m, "%sunknown flags %#llx",
 673                                 first ? sep : "", flags & ~(mask - 1));
 674 }
 675
 676 int lprocfs_rd_import(struct seq_file *m, void *data)
 677 {
 678         struct lprocfs_counter          ret;
 679         struct lprocfs_counter_header   *header;
 680         struct obd_device               *obd    = (struct obd_device *)data;
 681         struct obd_import               *imp;
 682         struct obd_import_conn          *conn;
 683         int                             j;
 684         int                             k;
 685         int                             rw      = 0;
 686
 687         LASSERT(obd != NULL);
 688         LPROCFS_CLIMP_CHECK(obd);
 689         imp = obd->u.cli.cl_import;
 690
 691         seq_printf(m,
 692                      "import:\n"
 693                      "    name: %s\n"
 694                      "    target: %s\n"
 695                      "    state: %s\n"
 696                      "    instance: %u\n"
 697                      "    connect_flags: [",
 698                      obd->obd_name,
 699                      obd2cli_tgt(obd),
 700                      ptlrpc_import_state_name(imp->imp_state),
 701                      imp->imp_connect_data.ocd_instance);
 702         obd_connect_seq_flags2str(m, imp->imp_connect_data.ocd_connect_flags, ", ");
 703         seq_printf(m,
 704                       "]\n"
 705                       "    import_flags: [");
 706         obd_import_flags2str(imp, m);
 707
 708         seq_printf(m,
 709                       "]\n"
 710                       "    connection:\n"
 711                       "       failover_nids: [");
 712         spin_lock(&imp->imp_lock);
 713         j = 0;
 714         list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
 715                 seq_printf(m, "%s%s", j ? ", " : "",
 716                            libcfs_nid2str(conn->oic_conn->c_peer.nid));
 717                 j++;
 718         }
 719         seq_printf(m,
 720                       "]\n"
 721                       "       current_connection: %s\n"
 722                       "       connection_attempts: %u\n"
 723                       "       generation: %u\n"
 724                       "       in-progress_invalidations: %u\n",
 725                       imp->imp_connection == NULL ? "<none>" :
 726                               libcfs_nid2str(imp->imp_connection->c_peer.nid),
 727                       imp->imp_conn_cnt,
 728                       imp->imp_generation,
 729                       atomic_read(&imp->imp_inval_count));
 730         spin_unlock(&imp->imp_lock);
 731
 732         if (obd->obd_svc_stats == NULL)
 733                 goto out_climp;
 734
 735         header = &obd->obd_svc_stats->ls_cnt_header[PTLRPC_REQWAIT_CNTR];
 736         lprocfs_stats_collect(obd->obd_svc_stats, PTLRPC_REQWAIT_CNTR, &ret);
 737         if (ret.lc_count != 0) {
 738                 /* first argument to do_div MUST be __u64 */
 739                 __u64 sum = ret.lc_sum;
 740                 do_div(sum, ret.lc_count);
 741                 ret.lc_sum = sum;
 742         } else
 743                 ret.lc_sum = 0;
 744         seq_printf(m,
 745                       "    rpcs:\n"
 746                       "       inflight: %u\n"
 747                       "       unregistering: %u\n"
 748                       "       timeouts: %u\n"
 749                       "       avg_waittime: %llu %s\n",
 750                       atomic_read(&imp->imp_inflight),
 751                       atomic_read(&imp->imp_unregistering),
 752                       atomic_read(&imp->imp_timeouts),
 753                       ret.lc_sum, header->lc_units);
 754
 755         k = 0;
 756         for (j = 0; j < IMP_AT_MAX_PORTALS; j++) {
 757                 if (imp->imp_at.iat_portal[j] == 0)
 758                         break;
 759                 k = max_t(unsigned int, k,
 760                           at_get(&imp->imp_at.iat_service_estimate[j]));
 761         }
 762         seq_printf(m,
 763                       "    service_estimates:\n"
 764                       "       services: %u sec\n"
 765                       "       network: %u sec\n",
 766                       k,
 767                       at_get(&imp->imp_at.iat_net_latency));
 768
 769         seq_printf(m,
 770                       "    transactions:\n"
 771                       "       last_replay: %llu\n"
 772                       "       peer_committed: %llu\n"
 773                       "       last_checked: %llu\n",
 774                       imp->imp_last_replay_transno,
 775                       imp->imp_peer_committed_transno,
 776                       imp->imp_last_transno_checked);
 777
 778         /* avg data rates */
 779         for (rw = 0; rw <= 1; rw++) {
 780                 lprocfs_stats_collect(obd->obd_svc_stats,
 781                                       PTLRPC_LAST_CNTR + BRW_READ_BYTES + rw,
 782                                       &ret);
 783                 if (ret.lc_sum > 0 && ret.lc_count > 0) {
 784                         /* first argument to do_div MUST be __u64 */
 785                         __u64 sum = ret.lc_sum;
 786                         do_div(sum, ret.lc_count);
 787                         ret.lc_sum = sum;
 788                         seq_printf(m,
 789                                       "    %s_data_averages:\n"
 790                                       "       bytes_per_rpc: %llu\n",
 791                                       rw ? "write" : "read",
 792                                       ret.lc_sum);
 793                 }
 794                 k = (int)ret.lc_sum;
 795                 j = opcode_offset(OST_READ + rw) + EXTRA_MAX_OPCODES;
 796                 header = &obd->obd_svc_stats->ls_cnt_header[j];
 797                 lprocfs_stats_collect(obd->obd_svc_stats, j, &ret);
 798                 if (ret.lc_sum > 0 && ret.lc_count != 0) {
 799                         /* first argument to do_div MUST be __u64 */
 800                         __u64 sum = ret.lc_sum;
 801                         do_div(sum, ret.lc_count);
 802                         ret.lc_sum = sum;
 803                         seq_printf(m,
 804                                       "       %s_per_rpc: %llu\n",
 805                                       header->lc_units, ret.lc_sum);
 806                         j = (int)ret.lc_sum;
 807                         if (j > 0)
 808                                 seq_printf(m,
 809                                               "       MB_per_sec: %u.%.02u\n",
 810                                               k / j, (100 * k / j) % 100);
 811                 }
 812         }
 813
 814 out_climp:
 815         LPROCFS_CLIMP_EXIT(obd);
 816         return 0;
 817 }
 818 EXPORT_SYMBOL(lprocfs_rd_import);
 819
 820 int lprocfs_rd_state(struct seq_file *m, void *data)
 821 {
 822         struct obd_device *obd = (struct obd_device *)data;
 823         struct obd_import *imp;
 824         int j, k;
 825
 826         LASSERT(obd != NULL);
 827         LPROCFS_CLIMP_CHECK(obd);
 828         imp = obd->u.cli.cl_import;
 829
 830         seq_printf(m, "current_state: %s\n",
 831                      ptlrpc_import_state_name(imp->imp_state));
 832         seq_printf(m, "state_history:\n");
 833         k = imp->imp_state_hist_idx;
 834         for (j = 0; j < IMP_STATE_HIST_LEN; j++) {
 835                 struct import_state_hist *ish =
 836                         &imp->imp_state_hist[(k + j) % IMP_STATE_HIST_LEN];
 837                 if (ish->ish_state == 0)
 838                         continue;
 839                 seq_printf(m, " - ["CFS_TIME_T", %s]\n",
 840                               ish->ish_time,
 841                               ptlrpc_import_state_name(ish->ish_state));
 842         }
 843
 844         LPROCFS_CLIMP_EXIT(obd);
 845         return 0;
 846 }
 847 EXPORT_SYMBOL(lprocfs_rd_state);
 848
 849 int lprocfs_at_hist_helper(struct seq_file *m, struct adaptive_timeout *at)
 850 {
 851         int i;
 852         for (i = 0; i < AT_BINS; i++)
 853                 seq_printf(m, "%3u ", at->at_hist[i]);
 854         seq_printf(m, "\n");
 855         return 0;
 856 }
 857 EXPORT_SYMBOL(lprocfs_at_hist_helper);
 858
 859 /* See also ptlrpc_lprocfs_rd_timeouts */
 860 int lprocfs_rd_timeouts(struct seq_file *m, void *data)
 861 {
 862         struct obd_device *obd = (struct obd_device *)data;
 863         struct obd_import *imp;
 864         unsigned int cur, worst;
 865         time_t now, worstt;
 866         struct dhms ts;
 867         int i;
 868
 869         LASSERT(obd != NULL);
 870         LPROCFS_CLIMP_CHECK(obd);
 871         imp = obd->u.cli.cl_import;
 872
 873         now = get_seconds();
 874
 875         /* Some network health info for kicks */
 876         s2dhms(&ts, now - imp->imp_last_reply_time);
 877         seq_printf(m, "%-10s : %ld, "DHMS_FMT" ago\n",
 878                        "last reply", imp->imp_last_reply_time, DHMS_VARS(&ts));
 879
 880         cur = at_get(&imp->imp_at.iat_net_latency);
 881         worst = imp->imp_at.iat_net_latency.at_worst_ever;
 882         worstt = imp->imp_at.iat_net_latency.at_worst_time;
 883         s2dhms(&ts, now - worstt);
 884         seq_printf(m, "%-10s : cur %3u  worst %3u (at %ld, "DHMS_FMT" ago) ",
 885                        "network", cur, worst, worstt, DHMS_VARS(&ts));
 886         lprocfs_at_hist_helper(m, &imp->imp_at.iat_net_latency);
 887
 888         for (i = 0; i < IMP_AT_MAX_PORTALS; i++) {
 889                 if (imp->imp_at.iat_portal[i] == 0)
 890                         break;
 891                 cur = at_get(&imp->imp_at.iat_service_estimate[i]);
 892                 worst = imp->imp_at.iat_service_estimate[i].at_worst_ever;
 893                 worstt = imp->imp_at.iat_service_estimate[i].at_worst_time;
 894                 s2dhms(&ts, now - worstt);
 895                 seq_printf(m, "portal %-2d  : cur %3u  worst %3u (at %ld, "
 896                                DHMS_FMT" ago) ", imp->imp_at.iat_portal[i],
 897                                cur, worst, worstt, DHMS_VARS(&ts));
 898                 lprocfs_at_hist_helper(m, &imp->imp_at.iat_service_estimate[i]);
 899         }
 900
 901         LPROCFS_CLIMP_EXIT(obd);
 902         return 0;
 903 }
 904 EXPORT_SYMBOL(lprocfs_rd_timeouts);
 905
 906 int lprocfs_rd_connect_flags(struct seq_file *m, void *data)
 907 {
 908         struct obd_device *obd = data;
 909         __u64 flags;
 910
 911         LPROCFS_CLIMP_CHECK(obd);
 912         flags = obd->u.cli.cl_import->imp_connect_data.ocd_connect_flags;
 913         seq_printf(m, "flags=%#llx\n", flags);
 914         obd_connect_seq_flags2str(m, flags, "\n");
 915         seq_printf(m, "\n");
 916         LPROCFS_CLIMP_EXIT(obd);
 917         return 0;
 918 }
 919 EXPORT_SYMBOL(lprocfs_rd_connect_flags);
 920
 921 int lprocfs_rd_num_exports(struct seq_file *m, void *data)
 922 {
 923         struct obd_device *obd = data;
 924
 925         LASSERT(obd != NULL);
 926         return seq_printf(m, "%u\n", obd->obd_num_exports);
 927 }
 928 EXPORT_SYMBOL(lprocfs_rd_num_exports);
 929
 930 int lprocfs_rd_numrefs(struct seq_file *m, void *data)
 931 {
 932         struct obd_type *class = (struct obd_type *) data;
 933
 934         LASSERT(class != NULL);
 935         return seq_printf(m, "%d\n", class->typ_refcnt);
 936 }
 937 EXPORT_SYMBOL(lprocfs_rd_numrefs);
 938
 939 int lprocfs_obd_setup(struct obd_device *obd, struct lprocfs_vars *list)
 940 {
 941         int rc = 0;
 942
 943         LASSERT(obd != NULL);
 944         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 945         LASSERT(obd->obd_type->typ_procroot != NULL);
 946
 947         obd->obd_proc_entry = lprocfs_register(obd->obd_name,
 948                                                obd->obd_type->typ_procroot,
 949                                                list, obd);
 950         if (IS_ERR(obd->obd_proc_entry)) {
 951                 rc = PTR_ERR(obd->obd_proc_entry);
 952                 CERROR("error %d setting up lprocfs for %s\n",
 953                        rc, obd->obd_name);
 954                 obd->obd_proc_entry = NULL;
 955         }
 956         return rc;
 957 }
 958 EXPORT_SYMBOL(lprocfs_obd_setup);
 959
 960 int lprocfs_obd_cleanup(struct obd_device *obd)
 961 {
 962         if (!obd)
 963                 return -EINVAL;
 964         if (obd->obd_proc_exports_entry) {
 965                 /* Should be no exports left */
 966                 lprocfs_remove(&obd->obd_proc_exports_entry);
 967                 obd->obd_proc_exports_entry = NULL;
 968         }
 969         if (obd->obd_proc_entry) {
 970                 lprocfs_remove(&obd->obd_proc_entry);
 971                 obd->obd_proc_entry = NULL;
 972         }
 973         return 0;
 974 }
 975 EXPORT_SYMBOL(lprocfs_obd_cleanup);
 976
 977 static void lprocfs_free_client_stats(struct nid_stat *client_stat)
 978 {
 979         CDEBUG(D_CONFIG, "stat %p - data %p/%p\n", client_stat,
 980                client_stat->nid_proc, client_stat->nid_stats);
 981
 982         LASSERTF(atomic_read(&client_stat->nid_exp_ref_count) == 0,
 983                  "nid %s:count %d\n", libcfs_nid2str(client_stat->nid),
 984                  atomic_read(&client_stat->nid_exp_ref_count));
 985
 986         if (client_stat->nid_proc)
 987                 lprocfs_remove(&client_stat->nid_proc);
 988
 989         if (client_stat->nid_stats)
 990                 lprocfs_free_stats(&client_stat->nid_stats);
 991
 992         if (client_stat->nid_ldlm_stats)
 993                 lprocfs_free_stats(&client_stat->nid_ldlm_stats);
 994
 995         OBD_FREE_PTR(client_stat);
 996         return;
 997
 998 }
 999
1000 void lprocfs_free_per_client_stats(struct obd_device *obd)
1001 {
1002         struct cfs_hash *hash = obd->obd_nid_stats_hash;
1003         struct nid_stat *stat;
1004
1005         /* we need extra list - because hash_exit called to early */
1006         /* not need locking because all clients is died */
1007         while (!list_empty(&obd->obd_nid_stats)) {
1008                 stat = list_entry(obd->obd_nid_stats.next,
1009                                       struct nid_stat, nid_list);
1010                 list_del_init(&stat->nid_list);
1011                 cfs_hash_del(hash, &stat->nid, &stat->nid_hash);
1012                 lprocfs_free_client_stats(stat);
1013         }
1014 }
1015 EXPORT_SYMBOL(lprocfs_free_per_client_stats);
1016
1017 int lprocfs_stats_alloc_one(struct lprocfs_stats *stats, unsigned int cpuid)
1018 {
1019         struct lprocfs_counter  *cntr;
1020         unsigned int            percpusize;
1021         int                     rc = -ENOMEM;
1022         unsigned long           flags = 0;
1023         int                     i;
1024
1025         LASSERT(stats->ls_percpu[cpuid] == NULL);
1026         LASSERT((stats->ls_flags & LPROCFS_STATS_FLAG_NOPERCPU) == 0);
1027
1028         percpusize = lprocfs_stats_counter_size(stats);
1029         LIBCFS_ALLOC_ATOMIC(stats->ls_percpu[cpuid], percpusize);
1030         if (stats->ls_percpu[cpuid] != NULL) {
1031                 rc = 0;
1032                 if (unlikely(stats->ls_biggest_alloc_num <= cpuid)) {
1033                         if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE)
1034                                 spin_lock_irqsave(&stats->ls_lock, flags);
1035                         else
1036                                 spin_lock(&stats->ls_lock);
1037                         if (stats->ls_biggest_alloc_num <= cpuid)
1038                                 stats->ls_biggest_alloc_num = cpuid + 1;
1039                         if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE)
1040                                 spin_unlock_irqrestore(&stats->ls_lock, flags);
1041                         else
1042                                 spin_unlock(&stats->ls_lock);
1043                 }
1044                 /* initialize the ls_percpu[cpuid] non-zero counter */
1045                 for (i = 0; i < stats->ls_num; ++i) {
1046                         cntr = lprocfs_stats_counter_get(stats, cpuid, i);
1047                         cntr->lc_min = LC_MIN_INIT;
1048                 }
1049         }
1050         return rc;
1051 }
1052 EXPORT_SYMBOL(lprocfs_stats_alloc_one);
1053
1054 struct lprocfs_stats *lprocfs_alloc_stats(unsigned int num,
1055                                           enum lprocfs_stats_flags flags)
1056 {
1057         struct lprocfs_stats    *stats;
1058         unsigned int            num_entry;
1059         unsigned int            percpusize = 0;
1060         int                     i;
1061
1062         if (num == 0)
1063                 return NULL;
1064
1065         if (lprocfs_no_percpu_stats != 0)
1066                 flags |= LPROCFS_STATS_FLAG_NOPERCPU;
1067
1068         if (flags & LPROCFS_STATS_FLAG_NOPERCPU)
1069                 num_entry = 1;
1070         else
1071                 num_entry = num_possible_cpus();
1072
1073         /* alloc percpu pointers for all possible cpu slots */
1074         LIBCFS_ALLOC(stats, offsetof(typeof(*stats), ls_percpu[num_entry]));
1075         if (stats == NULL)
1076                 return NULL;
1077
1078         stats->ls_num = num;
1079         stats->ls_flags = flags;
1080         spin_lock_init(&stats->ls_lock);
1081
1082         /* alloc num of counter headers */
1083         LIBCFS_ALLOC(stats->ls_cnt_header,
1084                      stats->ls_num * sizeof(struct lprocfs_counter_header));
1085         if (stats->ls_cnt_header == NULL)
1086                 goto fail;
1087
1088         if ((flags & LPROCFS_STATS_FLAG_NOPERCPU) != 0) {
1089                 /* contains only one set counters */
1090                 percpusize = lprocfs_stats_counter_size(stats);
1091                 LIBCFS_ALLOC_ATOMIC(stats->ls_percpu[0], percpusize);
1092                 if (stats->ls_percpu[0] == NULL)
1093                         goto fail;
1094                 stats->ls_biggest_alloc_num = 1;
1095         } else if ((flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0) {
1096                 /* alloc all percpu data, currently only obd_memory use this */
1097                 for (i = 0; i < num_entry; ++i)
1098                         if (lprocfs_stats_alloc_one(stats, i) < 0)
1099                                 goto fail;
1100         }
1101
1102         return stats;
1103
1104 fail:
1105         lprocfs_free_stats(&stats);
1106         return NULL;
1107 }
1108 EXPORT_SYMBOL(lprocfs_alloc_stats);
1109
1110 void lprocfs_free_stats(struct lprocfs_stats **statsh)
1111 {
1112         struct lprocfs_stats *stats = *statsh;
1113         unsigned int num_entry;
1114         unsigned int percpusize;
1115         unsigned int i;
1116
1117         if (stats == NULL || stats->ls_num == 0)
1118                 return;
1119         *statsh = NULL;
1120
1121         if (stats->ls_flags & LPROCFS_STATS_FLAG_NOPERCPU)
1122                 num_entry = 1;
1123         else
1124                 num_entry = num_possible_cpus();
1125
1126         percpusize = lprocfs_stats_counter_size(stats);
1127         for (i = 0; i < num_entry; i++)
1128                 if (stats->ls_percpu[i] != NULL)
1129                         LIBCFS_FREE(stats->ls_percpu[i], percpusize);
1130         if (stats->ls_cnt_header != NULL)
1131                 LIBCFS_FREE(stats->ls_cnt_header, stats->ls_num *
1132                                         sizeof(struct lprocfs_counter_header));
1133         LIBCFS_FREE(stats, offsetof(typeof(*stats), ls_percpu[num_entry]));
1134 }
1135 EXPORT_SYMBOL(lprocfs_free_stats);
1136
1137 void lprocfs_clear_stats(struct lprocfs_stats *stats)
1138 {
1139         struct lprocfs_counter          *percpu_cntr;
1140         int                             i;
1141         int                             j;
1142         unsigned int                    num_entry;
1143         unsigned long                   flags = 0;
1144
1145         num_entry = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
1146
1147         for (i = 0; i < num_entry; i++) {
1148                 if (stats->ls_percpu[i] == NULL)
1149                         continue;
1150                 for (j = 0; j < stats->ls_num; j++) {
1151                         percpu_cntr = lprocfs_stats_counter_get(stats, i, j);
1152                         percpu_cntr->lc_count           = 0;
1153                         percpu_cntr->lc_min             = LC_MIN_INIT;
1154                         percpu_cntr->lc_max             = 0;
1155                         percpu_cntr->lc_sumsquare       = 0;
1156                         percpu_cntr->lc_sum             = 0;
1157                         if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE)
1158                                 percpu_cntr->lc_sum_irq = 0;
1159                 }
1160         }
1161
1162         lprocfs_stats_unlock(stats, LPROCFS_GET_NUM_CPU, &flags);
1163 }
1164 EXPORT_SYMBOL(lprocfs_clear_stats);
1165
1166 static ssize_t lprocfs_stats_seq_write(struct file *file,
1167                                        const char __user *buf,
1168                                        size_t len, loff_t *off)
1169 {
1170         struct seq_file *seq = file->private_data;
1171         struct lprocfs_stats *stats = seq->private;
1172
1173         lprocfs_clear_stats(stats);
1174
1175         return len;
1176 }
1177
1178 static void *lprocfs_stats_seq_start(struct seq_file *p, loff_t *pos)
1179 {
1180         struct lprocfs_stats *stats = p->private;
1181
1182         return (*pos < stats->ls_num) ? pos : NULL;
1183 }
1184
1185 static void lprocfs_stats_seq_stop(struct seq_file *p, void *v)
1186 {
1187 }
1188
1189 static void *lprocfs_stats_seq_next(struct seq_file *p, void *v, loff_t *pos)
1190 {
1191         (*pos)++;
1192         return lprocfs_stats_seq_start(p, pos);
1193 }
1194
1195 /* seq file export of one lprocfs counter */
1196 static int lprocfs_stats_seq_show(struct seq_file *p, void *v)
1197 {
1198         struct lprocfs_stats            *stats  = p->private;
1199         struct lprocfs_counter_header   *hdr;
1200         struct lprocfs_counter           ctr;
1201         int                              idx    = *(loff_t *)v;
1202         int                              rc     = 0;
1203
1204         if (idx == 0) {
1205                 struct timeval now;
1206                 do_gettimeofday(&now);
1207                 rc = seq_printf(p, "%-25s %lu.%lu secs.usecs\n",
1208                                 "snapshot_time", now.tv_sec, (unsigned long)now.tv_usec);
1209                 if (rc < 0)
1210                         return rc;
1211         }
1212         hdr = &stats->ls_cnt_header[idx];
1213         lprocfs_stats_collect(stats, idx, &ctr);
1214
1215         if (ctr.lc_count == 0)
1216                 goto out;
1217
1218         rc = seq_printf(p, "%-25s %lld samples [%s]", hdr->lc_name,
1219                         ctr.lc_count, hdr->lc_units);
1220
1221         if (rc < 0)
1222                 goto out;
1223
1224         if ((hdr->lc_config & LPROCFS_CNTR_AVGMINMAX) && (ctr.lc_count > 0)) {
1225                 rc = seq_printf(p, " %lld %lld %lld",
1226                                 ctr.lc_min, ctr.lc_max, ctr.lc_sum);
1227                 if (rc < 0)
1228                         goto out;
1229                 if (hdr->lc_config & LPROCFS_CNTR_STDDEV)
1230                         rc = seq_printf(p, " %lld", ctr.lc_sumsquare);
1231                 if (rc < 0)
1232                         goto out;
1233         }
1234         rc = seq_printf(p, "\n");
1235 out:
1236         return (rc < 0) ? rc : 0;
1237 }
1238
1239 static const struct seq_operations lprocfs_stats_seq_sops = {
1240         .start  = lprocfs_stats_seq_start,
1241         .stop   = lprocfs_stats_seq_stop,
1242         .next   = lprocfs_stats_seq_next,
1243         .show   = lprocfs_stats_seq_show,
1244 };
1245
1246 static int lprocfs_stats_seq_open(struct inode *inode, struct file *file)
1247 {
1248         struct seq_file *seq;
1249         int rc;
1250
1251         rc = seq_open(file, &lprocfs_stats_seq_sops);
1252         if (rc)
1253                 return rc;
1254         seq = file->private_data;
1255         seq->private = PDE_DATA(inode);
1256         return 0;
1257 }
1258
1259 struct file_operations lprocfs_stats_seq_fops = {
1260         .owner   = THIS_MODULE,
1261         .open    = lprocfs_stats_seq_open,
1262         .read    = seq_read,
1263         .write   = lprocfs_stats_seq_write,
1264         .llseek  = seq_lseek,
1265         .release = lprocfs_seq_release,
1266 };
1267
1268 int lprocfs_register_stats(struct proc_dir_entry *root, const char *name,
1269                            struct lprocfs_stats *stats)
1270 {
1271         struct proc_dir_entry *entry;
1272         LASSERT(root != NULL);
1273
1274         entry = proc_create_data(name, 0644, root,
1275                                  &lprocfs_stats_seq_fops, stats);
1276         if (entry == NULL)
1277                 return -ENOMEM;
1278
1279         return 0;
1280 }
1281 EXPORT_SYMBOL(lprocfs_register_stats);
1282
1283 void lprocfs_counter_init(struct lprocfs_stats *stats, int index,
1284                           unsigned conf, const char *name, const char *units)
1285 {
1286         struct lprocfs_counter_header   *header;
1287         struct lprocfs_counter          *percpu_cntr;
1288         unsigned long                   flags = 0;
1289         unsigned int                    i;
1290         unsigned int                    num_cpu;
1291
1292         LASSERT(stats != NULL);
1293
1294         header = &stats->ls_cnt_header[index];
1295         LASSERTF(header != NULL, "Failed to allocate stats header:[%d]%s/%s\n",
1296                  index, name, units);
1297
1298         header->lc_config = conf;
1299         header->lc_name   = name;
1300         header->lc_units  = units;
1301
1302         num_cpu = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
1303         for (i = 0; i < num_cpu; ++i) {
1304                 if (stats->ls_percpu[i] == NULL)
1305                         continue;
1306                 percpu_cntr = lprocfs_stats_counter_get(stats, i, index);
1307                 percpu_cntr->lc_count           = 0;
1308                 percpu_cntr->lc_min             = LC_MIN_INIT;
1309                 percpu_cntr->lc_max             = 0;
1310                 percpu_cntr->lc_sumsquare       = 0;
1311                 percpu_cntr->lc_sum             = 0;
1312                 if ((stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0)
1313                         percpu_cntr->lc_sum_irq = 0;
1314         }
1315         lprocfs_stats_unlock(stats, LPROCFS_GET_NUM_CPU, &flags);
1316 }
1317 EXPORT_SYMBOL(lprocfs_counter_init);
1318
1319 #define LPROCFS_OBD_OP_INIT(base, stats, op)                           \
1320 do {                                                                   \
1321         unsigned int coffset = base + OBD_COUNTER_OFFSET(op);         \
1322         LASSERT(coffset < stats->ls_num);                                 \
1323         lprocfs_counter_init(stats, coffset, 0, #op, "reqs");         \
1324 } while (0)
1325
1326 void lprocfs_init_ops_stats(int num_private_stats, struct lprocfs_stats *stats)
1327 {
1328         LPROCFS_OBD_OP_INIT(num_private_stats, stats, iocontrol);
1329         LPROCFS_OBD_OP_INIT(num_private_stats, stats, get_info);
1330         LPROCFS_OBD_OP_INIT(num_private_stats, stats, set_info_async);
1331         LPROCFS_OBD_OP_INIT(num_private_stats, stats, attach);
1332         LPROCFS_OBD_OP_INIT(num_private_stats, stats, detach);
1333         LPROCFS_OBD_OP_INIT(num_private_stats, stats, setup);
1334         LPROCFS_OBD_OP_INIT(num_private_stats, stats, precleanup);
1335         LPROCFS_OBD_OP_INIT(num_private_stats, stats, cleanup);
1336         LPROCFS_OBD_OP_INIT(num_private_stats, stats, process_config);
1337         LPROCFS_OBD_OP_INIT(num_private_stats, stats, postrecov);
1338         LPROCFS_OBD_OP_INIT(num_private_stats, stats, add_conn);
1339         LPROCFS_OBD_OP_INIT(num_private_stats, stats, del_conn);
1340         LPROCFS_OBD_OP_INIT(num_private_stats, stats, connect);
1341         LPROCFS_OBD_OP_INIT(num_private_stats, stats, reconnect);
1342         LPROCFS_OBD_OP_INIT(num_private_stats, stats, disconnect);
1343         LPROCFS_OBD_OP_INIT(num_private_stats, stats, fid_init);
1344         LPROCFS_OBD_OP_INIT(num_private_stats, stats, fid_fini);
1345         LPROCFS_OBD_OP_INIT(num_private_stats, stats, fid_alloc);
1346         LPROCFS_OBD_OP_INIT(num_private_stats, stats, statfs);
1347         LPROCFS_OBD_OP_INIT(num_private_stats, stats, statfs_async);
1348         LPROCFS_OBD_OP_INIT(num_private_stats, stats, packmd);
1349         LPROCFS_OBD_OP_INIT(num_private_stats, stats, unpackmd);
1350         LPROCFS_OBD_OP_INIT(num_private_stats, stats, preallocate);
1351         LPROCFS_OBD_OP_INIT(num_private_stats, stats, create);
1352         LPROCFS_OBD_OP_INIT(num_private_stats, stats, destroy);
1353         LPROCFS_OBD_OP_INIT(num_private_stats, stats, setattr);
1354         LPROCFS_OBD_OP_INIT(num_private_stats, stats, setattr_async);
1355         LPROCFS_OBD_OP_INIT(num_private_stats, stats, getattr);
1356         LPROCFS_OBD_OP_INIT(num_private_stats, stats, getattr_async);
1357         LPROCFS_OBD_OP_INIT(num_private_stats, stats, adjust_kms);
1358         LPROCFS_OBD_OP_INIT(num_private_stats, stats, preprw);
1359         LPROCFS_OBD_OP_INIT(num_private_stats, stats, commitrw);
1360         LPROCFS_OBD_OP_INIT(num_private_stats, stats, find_cbdata);
1361         LPROCFS_OBD_OP_INIT(num_private_stats, stats, init_export);
1362         LPROCFS_OBD_OP_INIT(num_private_stats, stats, destroy_export);
1363         LPROCFS_OBD_OP_INIT(num_private_stats, stats, import_event);
1364         LPROCFS_OBD_OP_INIT(num_private_stats, stats, notify);
1365         LPROCFS_OBD_OP_INIT(num_private_stats, stats, health_check);
1366         LPROCFS_OBD_OP_INIT(num_private_stats, stats, get_uuid);
1367         LPROCFS_OBD_OP_INIT(num_private_stats, stats, quotacheck);
1368         LPROCFS_OBD_OP_INIT(num_private_stats, stats, quotactl);
1369         LPROCFS_OBD_OP_INIT(num_private_stats, stats, pool_new);
1370         LPROCFS_OBD_OP_INIT(num_private_stats, stats, pool_rem);
1371         LPROCFS_OBD_OP_INIT(num_private_stats, stats, pool_add);
1372         LPROCFS_OBD_OP_INIT(num_private_stats, stats, pool_del);
1373         LPROCFS_OBD_OP_INIT(num_private_stats, stats, getref);
1374         LPROCFS_OBD_OP_INIT(num_private_stats, stats, putref);
1375 }
1376 EXPORT_SYMBOL(lprocfs_init_ops_stats);
1377
1378 int lprocfs_alloc_obd_stats(struct obd_device *obd, unsigned num_private_stats)
1379 {
1380         struct lprocfs_stats *stats;
1381         unsigned int num_stats;
1382         int rc, i;
1383
1384         LASSERT(obd->obd_stats == NULL);
1385         LASSERT(obd->obd_proc_entry != NULL);
1386         LASSERT(obd->obd_cntr_base == 0);
1387
1388         num_stats = ((int)sizeof(*obd->obd_type->typ_dt_ops) / sizeof(void *)) +
1389                 num_private_stats - 1 /* o_owner */;
1390         stats = lprocfs_alloc_stats(num_stats, 0);
1391         if (stats == NULL)
1392                 return -ENOMEM;
1393
1394         lprocfs_init_ops_stats(num_private_stats, stats);
1395
1396         for (i = num_private_stats; i < num_stats; i++) {
1397                 /* If this LBUGs, it is likely that an obd
1398                  * operation was added to struct obd_ops in
1399                  * <obd.h>, and that the corresponding line item
1400                  * LPROCFS_OBD_OP_INIT(.., .., opname)
1401                  * is missing from the list above. */
1402                 LASSERTF(stats->ls_cnt_header[i].lc_name != NULL,
1403                          "Missing obd_stat initializer obd_op "
1404                          "operation at offset %d.\n", i - num_private_stats);
1405         }
1406         rc = lprocfs_register_stats(obd->obd_proc_entry, "stats", stats);
1407         if (rc < 0) {
1408                 lprocfs_free_stats(&stats);
1409         } else {
1410                 obd->obd_stats  = stats;
1411                 obd->obd_cntr_base = num_private_stats;
1412         }
1413         return rc;
1414 }
1415 EXPORT_SYMBOL(lprocfs_alloc_obd_stats);
1416
1417 void lprocfs_free_obd_stats(struct obd_device *obd)
1418 {
1419         if (obd->obd_stats)
1420                 lprocfs_free_stats(&obd->obd_stats);
1421 }
1422 EXPORT_SYMBOL(lprocfs_free_obd_stats);
1423
1424 #define LPROCFS_MD_OP_INIT(base, stats, op)                          \
1425 do {                                                                \
1426         unsigned int coffset = base + MD_COUNTER_OFFSET(op);        \
1427         LASSERT(coffset < stats->ls_num);                              \
1428         lprocfs_counter_init(stats, coffset, 0, #op, "reqs");      \
1429 } while (0)
1430
1431 void lprocfs_init_mps_stats(int num_private_stats, struct lprocfs_stats *stats)
1432 {
1433         LPROCFS_MD_OP_INIT(num_private_stats, stats, getstatus);
1434         LPROCFS_MD_OP_INIT(num_private_stats, stats, null_inode);
1435         LPROCFS_MD_OP_INIT(num_private_stats, stats, find_cbdata);
1436         LPROCFS_MD_OP_INIT(num_private_stats, stats, close);
1437         LPROCFS_MD_OP_INIT(num_private_stats, stats, create);
1438         LPROCFS_MD_OP_INIT(num_private_stats, stats, done_writing);
1439         LPROCFS_MD_OP_INIT(num_private_stats, stats, enqueue);
1440         LPROCFS_MD_OP_INIT(num_private_stats, stats, getattr);
1441         LPROCFS_MD_OP_INIT(num_private_stats, stats, getattr_name);
1442         LPROCFS_MD_OP_INIT(num_private_stats, stats, intent_lock);
1443         LPROCFS_MD_OP_INIT(num_private_stats, stats, link);
1444         LPROCFS_MD_OP_INIT(num_private_stats, stats, rename);
1445         LPROCFS_MD_OP_INIT(num_private_stats, stats, is_subdir);
1446         LPROCFS_MD_OP_INIT(num_private_stats, stats, setattr);
1447         LPROCFS_MD_OP_INIT(num_private_stats, stats, sync);
1448         LPROCFS_MD_OP_INIT(num_private_stats, stats, readpage);
1449         LPROCFS_MD_OP_INIT(num_private_stats, stats, unlink);
1450         LPROCFS_MD_OP_INIT(num_private_stats, stats, setxattr);
1451         LPROCFS_MD_OP_INIT(num_private_stats, stats, getxattr);
1452         LPROCFS_MD_OP_INIT(num_private_stats, stats, init_ea_size);
1453         LPROCFS_MD_OP_INIT(num_private_stats, stats, get_lustre_md);
1454         LPROCFS_MD_OP_INIT(num_private_stats, stats, free_lustre_md);
1455         LPROCFS_MD_OP_INIT(num_private_stats, stats, set_open_replay_data);
1456         LPROCFS_MD_OP_INIT(num_private_stats, stats, clear_open_replay_data);
1457         LPROCFS_MD_OP_INIT(num_private_stats, stats, set_lock_data);
1458         LPROCFS_MD_OP_INIT(num_private_stats, stats, lock_match);
1459         LPROCFS_MD_OP_INIT(num_private_stats, stats, cancel_unused);
1460         LPROCFS_MD_OP_INIT(num_private_stats, stats, renew_capa);
1461         LPROCFS_MD_OP_INIT(num_private_stats, stats, unpack_capa);
1462         LPROCFS_MD_OP_INIT(num_private_stats, stats, get_remote_perm);
1463         LPROCFS_MD_OP_INIT(num_private_stats, stats, intent_getattr_async);
1464         LPROCFS_MD_OP_INIT(num_private_stats, stats, revalidate_lock);
1465 }
1466 EXPORT_SYMBOL(lprocfs_init_mps_stats);
1467
1468 int lprocfs_alloc_md_stats(struct obd_device *obd,
1469                            unsigned num_private_stats)
1470 {
1471         struct lprocfs_stats *stats;
1472         unsigned int num_stats;
1473         int rc, i;
1474
1475         LASSERT(obd->md_stats == NULL);
1476         LASSERT(obd->obd_proc_entry != NULL);
1477         LASSERT(obd->md_cntr_base == 0);
1478
1479         num_stats = 1 + MD_COUNTER_OFFSET(revalidate_lock) +
1480                     num_private_stats;
1481         stats = lprocfs_alloc_stats(num_stats, 0);
1482         if (stats == NULL)
1483                 return -ENOMEM;
1484
1485         lprocfs_init_mps_stats(num_private_stats, stats);
1486
1487         for (i = num_private_stats; i < num_stats; i++) {
1488                 if (stats->ls_cnt_header[i].lc_name == NULL) {
1489                         CERROR("Missing md_stat initializer md_op "
1490                                "operation at offset %d. Aborting.\n",
1491                                i - num_private_stats);
1492                         LBUG();
1493                 }
1494         }
1495         rc = lprocfs_register_stats(obd->obd_proc_entry, "md_stats", stats);
1496         if (rc < 0) {
1497                 lprocfs_free_stats(&stats);
1498         } else {
1499                 obd->md_stats  = stats;
1500                 obd->md_cntr_base = num_private_stats;
1501         }
1502         return rc;
1503 }
1504 EXPORT_SYMBOL(lprocfs_alloc_md_stats);
1505
1506 void lprocfs_free_md_stats(struct obd_device *obd)
1507 {
1508         struct lprocfs_stats *stats = obd->md_stats;
1509
1510         if (stats != NULL) {
1511                 obd->md_stats = NULL;
1512                 obd->md_cntr_base = 0;
1513                 lprocfs_free_stats(&stats);
1514         }
1515 }
1516 EXPORT_SYMBOL(lprocfs_free_md_stats);
1517
1518 void lprocfs_init_ldlm_stats(struct lprocfs_stats *ldlm_stats)
1519 {
1520         lprocfs_counter_init(ldlm_stats,
1521                              LDLM_ENQUEUE - LDLM_FIRST_OPC,
1522                              0, "ldlm_enqueue", "reqs");
1523         lprocfs_counter_init(ldlm_stats,
1524                              LDLM_CONVERT - LDLM_FIRST_OPC,
1525                              0, "ldlm_convert", "reqs");
1526         lprocfs_counter_init(ldlm_stats,
1527                              LDLM_CANCEL - LDLM_FIRST_OPC,
1528                              0, "ldlm_cancel", "reqs");
1529         lprocfs_counter_init(ldlm_stats,
1530                              LDLM_BL_CALLBACK - LDLM_FIRST_OPC,
1531                              0, "ldlm_bl_callback", "reqs");
1532         lprocfs_counter_init(ldlm_stats,
1533                              LDLM_CP_CALLBACK - LDLM_FIRST_OPC,
1534                              0, "ldlm_cp_callback", "reqs");
1535         lprocfs_counter_init(ldlm_stats,
1536                              LDLM_GL_CALLBACK - LDLM_FIRST_OPC,
1537                              0, "ldlm_gl_callback", "reqs");
1538 }
1539 EXPORT_SYMBOL(lprocfs_init_ldlm_stats);
1540
1541 int lprocfs_exp_print_uuid(struct cfs_hash *hs, struct cfs_hash_bd *bd,
1542                            struct hlist_node *hnode, void *data)
1543
1544 {
1545         struct obd_export *exp = cfs_hash_object(hs, hnode);
1546         struct seq_file *m = (struct seq_file *)data;
1547
1548         if (exp->exp_nid_stats)
1549                 seq_printf(m, "%s\n", obd_uuid2str(&exp->exp_client_uuid));
1550
1551         return 0;
1552 }
1553
1554 static int
1555 lproc_exp_uuid_seq_show(struct seq_file *m, void *unused)
1556 {
1557         struct nid_stat *stats = (struct nid_stat *)m->private;
1558         struct obd_device *obd = stats->nid_obd;
1559
1560         cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
1561                               lprocfs_exp_print_uuid, m);
1562         return 0;
1563 }
1564
1565 LPROC_SEQ_FOPS_RO(lproc_exp_uuid);
1566
1567 struct exp_hash_cb_data {
1568         struct seq_file *m;
1569         bool            first;
1570 };
1571
1572 int lprocfs_exp_print_hash(struct cfs_hash *hs, struct cfs_hash_bd *bd,
1573                            struct hlist_node *hnode, void *cb_data)
1574
1575 {
1576         struct exp_hash_cb_data *data = (struct exp_hash_cb_data *)cb_data;
1577         struct obd_export       *exp = cfs_hash_object(hs, hnode);
1578
1579         if (exp->exp_lock_hash != NULL) {
1580                 if (data->first) {
1581                         cfs_hash_debug_header(data->m);
1582                         data->first = false;
1583                 }
1584                 cfs_hash_debug_str(hs, data->m);
1585         }
1586
1587         return 0;
1588 }
1589
1590 static int
1591 lproc_exp_hash_seq_show(struct seq_file *m, void *unused)
1592 {
1593         struct nid_stat *stats = (struct nid_stat *)m->private;
1594         struct obd_device *obd = stats->nid_obd;
1595         struct exp_hash_cb_data cb_data = {
1596                 .m = m,
1597                 .first = true
1598         };
1599
1600         cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
1601                               lprocfs_exp_print_hash, &cb_data);
1602         return 0;
1603 }
1604
1605 LPROC_SEQ_FOPS_RO(lproc_exp_hash);
1606
1607 int lprocfs_nid_stats_clear_read(struct seq_file *m, void *data)
1608 {
1609         return seq_printf(m, "%s\n",
1610                         "Write into this file to clear all nid stats and "
1611                         "stale nid entries");
1612 }
1613 EXPORT_SYMBOL(lprocfs_nid_stats_clear_read);
1614
1615 static int lprocfs_nid_stats_clear_write_cb(void *obj, void *data)
1616 {
1617         struct nid_stat *stat = obj;
1618
1619         CDEBUG(D_INFO, "refcnt %d\n", atomic_read(&stat->nid_exp_ref_count));
1620         if (atomic_read(&stat->nid_exp_ref_count) == 1) {
1621                 /* object has only hash references. */
1622                 spin_lock(&stat->nid_obd->obd_nid_lock);
1623                 list_move(&stat->nid_list, data);
1624                 spin_unlock(&stat->nid_obd->obd_nid_lock);
1625                 return 1;
1626         }
1627         /* we has reference to object - only clear data*/
1628         if (stat->nid_stats)
1629                 lprocfs_clear_stats(stat->nid_stats);
1630
1631         return 0;
1632 }
1633
1634 int lprocfs_nid_stats_clear_write(struct file *file, const char *buffer,
1635                                   unsigned long count, void *data)
1636 {
1637         struct obd_device *obd = (struct obd_device *)data;
1638         struct nid_stat *client_stat;
1639         LIST_HEAD(free_list);
1640
1641         cfs_hash_cond_del(obd->obd_nid_stats_hash,
1642                           lprocfs_nid_stats_clear_write_cb, &free_list);
1643
1644         while (!list_empty(&free_list)) {
1645                 client_stat = list_entry(free_list.next, struct nid_stat,
1646                                              nid_list);
1647                 list_del_init(&client_stat->nid_list);
1648                 lprocfs_free_client_stats(client_stat);
1649         }
1650
1651         return count;
1652 }
1653 EXPORT_SYMBOL(lprocfs_nid_stats_clear_write);
1654
1655 int lprocfs_exp_setup(struct obd_export *exp, lnet_nid_t *nid, int *newnid)
1656 {
1657         struct nid_stat *new_stat, *old_stat;
1658         struct obd_device *obd = NULL;
1659         struct proc_dir_entry *entry;
1660         char *buffer = NULL;
1661         int rc = 0;
1662
1663         *newnid = 0;
1664
1665         if (!exp || !exp->exp_obd || !exp->exp_obd->obd_proc_exports_entry ||
1666             !exp->exp_obd->obd_nid_stats_hash)
1667                 return -EINVAL;
1668
1669         /* not test against zero because eric say:
1670          * You may only test nid against another nid, or LNET_NID_ANY.
1671          * Anything else is nonsense.*/
1672         if (!nid || *nid == LNET_NID_ANY)
1673                 return 0;
1674
1675         obd = exp->exp_obd;
1676
1677         CDEBUG(D_CONFIG, "using hash %p\n", obd->obd_nid_stats_hash);
1678
1679         OBD_ALLOC_PTR(new_stat);
1680         if (new_stat == NULL)
1681                 return -ENOMEM;
1682
1683         new_stat->nid          = *nid;
1684         new_stat->nid_obd          = exp->exp_obd;
1685         /* we need set default refcount to 1 to balance obd_disconnect */
1686         atomic_set(&new_stat->nid_exp_ref_count, 1);
1687
1688         old_stat = cfs_hash_findadd_unique(obd->obd_nid_stats_hash,
1689                                            nid, &new_stat->nid_hash);
1690         CDEBUG(D_INFO, "Found stats %p for nid %s - ref %d\n",
1691                old_stat, libcfs_nid2str(*nid),
1692                atomic_read(&new_stat->nid_exp_ref_count));
1693
1694         /* We need to release old stats because lprocfs_exp_cleanup() hasn't
1695          * been and will never be called. */
1696         if (exp->exp_nid_stats) {
1697                 nidstat_putref(exp->exp_nid_stats);
1698                 exp->exp_nid_stats = NULL;
1699         }
1700
1701         /* Return -EALREADY here so that we know that the /proc
1702          * entry already has been created */
1703         if (old_stat != new_stat) {
1704                 exp->exp_nid_stats = old_stat;
1705                 rc = -EALREADY;
1706                 goto destroy_new;
1707         }
1708         /* not found - create */
1709         OBD_ALLOC(buffer, LNET_NIDSTR_SIZE);
1710         if (buffer == NULL) {
1711                 rc = -ENOMEM;
1712                 goto destroy_new;
1713         }
1714
1715         memcpy(buffer, libcfs_nid2str(*nid), LNET_NIDSTR_SIZE);
1716         new_stat->nid_proc = lprocfs_register(buffer,
1717                                               obd->obd_proc_exports_entry,
1718                                               NULL, NULL);
1719         OBD_FREE(buffer, LNET_NIDSTR_SIZE);
1720
1721         if (IS_ERR(new_stat->nid_proc)) {
1722                 CERROR("Error making export directory for nid %s\n",
1723                        libcfs_nid2str(*nid));
1724                 rc = PTR_ERR(new_stat->nid_proc);
1725                 new_stat->nid_proc = NULL;
1726                 goto destroy_new_ns;
1727         }
1728
1729         entry = lprocfs_add_simple(new_stat->nid_proc, "uuid",
1730                                    new_stat, &lproc_exp_uuid_fops);
1731         if (IS_ERR(entry)) {
1732                 CWARN("Error adding the NID stats file\n");
1733                 rc = PTR_ERR(entry);
1734                 goto destroy_new_ns;
1735         }
1736
1737         entry = lprocfs_add_simple(new_stat->nid_proc, "hash",
1738                                    new_stat, &lproc_exp_hash_fops);
1739         if (IS_ERR(entry)) {
1740                 CWARN("Error adding the hash file\n");
1741                 rc = PTR_ERR(entry);
1742                 goto destroy_new_ns;
1743         }
1744
1745         exp->exp_nid_stats = new_stat;
1746         *newnid = 1;
1747         /* protect competitive add to list, not need locking on destroy */
1748         spin_lock(&obd->obd_nid_lock);
1749         list_add(&new_stat->nid_list, &obd->obd_nid_stats);
1750         spin_unlock(&obd->obd_nid_lock);
1751
1752         return rc;
1753
1754 destroy_new_ns:
1755         if (new_stat->nid_proc != NULL)
1756                 lprocfs_remove(&new_stat->nid_proc);
1757         cfs_hash_del(obd->obd_nid_stats_hash, nid, &new_stat->nid_hash);
1758
1759 destroy_new:
1760         nidstat_putref(new_stat);
1761         OBD_FREE_PTR(new_stat);
1762         return rc;
1763 }
1764 EXPORT_SYMBOL(lprocfs_exp_setup);
1765
1766 int lprocfs_exp_cleanup(struct obd_export *exp)
1767 {
1768         struct nid_stat *stat = exp->exp_nid_stats;
1769
1770         if (!stat || !exp->exp_obd)
1771                 return 0;
1772
1773         nidstat_putref(exp->exp_nid_stats);
1774         exp->exp_nid_stats = NULL;
1775
1776         return 0;
1777 }
1778 EXPORT_SYMBOL(lprocfs_exp_cleanup);
1779
1780 __s64 lprocfs_read_helper(struct lprocfs_counter *lc,
1781                           struct lprocfs_counter_header *header,
1782                           enum lprocfs_stats_flags flags,
1783                           enum lprocfs_fields_flags field)
1784 {
1785         __s64 ret = 0;
1786
1787         if (lc == NULL || header == NULL)
1788                 return 0;
1789
1790         switch (field) {
1791         case LPROCFS_FIELDS_FLAGS_CONFIG:
1792                 ret = header->lc_config;
1793                 break;
1794         case LPROCFS_FIELDS_FLAGS_SUM:
1795                 ret = lc->lc_sum;
1796                 if ((flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0)
1797                         ret += lc->lc_sum_irq;
1798                 break;
1799         case LPROCFS_FIELDS_FLAGS_MIN:
1800                 ret = lc->lc_min;
1801                 break;
1802         case LPROCFS_FIELDS_FLAGS_MAX:
1803                 ret = lc->lc_max;
1804                 break;
1805         case LPROCFS_FIELDS_FLAGS_AVG:
1806                 ret = (lc->lc_max - lc->lc_min) / 2;
1807                 break;
1808         case LPROCFS_FIELDS_FLAGS_SUMSQUARE:
1809                 ret = lc->lc_sumsquare;
1810                 break;
1811         case LPROCFS_FIELDS_FLAGS_COUNT:
1812                 ret = lc->lc_count;
1813                 break;
1814         default:
1815                 break;
1816         }
1817
1818         return 0;
1819 }
1820 EXPORT_SYMBOL(lprocfs_read_helper);
1821
1822 int lprocfs_write_helper(const char __user *buffer, unsigned long count,
1823                          int *val)
1824 {
1825         return lprocfs_write_frac_helper(buffer, count, val, 1);
1826 }
1827 EXPORT_SYMBOL(lprocfs_write_helper);
1828
1829 int lprocfs_seq_read_frac_helper(struct seq_file *m, long val, int mult)
1830 {
1831         long decimal_val, frac_val;
1832
1833         decimal_val = val / mult;
1834         seq_printf(m, "%ld", decimal_val);
1835         frac_val = val % mult;
1836
1837         if (frac_val > 0) {
1838                 frac_val *= 100;
1839                 frac_val /= mult;
1840         }
1841         if (frac_val > 0) {
1842                 /* Three cases: x0, xx, 0x */
1843                 if ((frac_val % 10) != 0)
1844                         seq_printf(m, ".%ld", frac_val);
1845                 else
1846                         seq_printf(m, ".%ld", frac_val / 10);
1847         }
1848
1849         seq_printf(m, "\n");
1850         return 0;
1851 }
1852 EXPORT_SYMBOL(lprocfs_seq_read_frac_helper);
1853
1854 int lprocfs_write_u64_helper(const char *buffer, unsigned long count,
1855                              __u64 *val)
1856 {
1857         return lprocfs_write_frac_u64_helper(buffer, count, val, 1);
1858 }
1859 EXPORT_SYMBOL(lprocfs_write_u64_helper);
1860
1861 int lprocfs_write_frac_u64_helper(const char *buffer, unsigned long count,
1862                               __u64 *val, int mult)
1863 {
1864         char kernbuf[22], *end, *pbuf;
1865         __u64 whole, frac = 0, units;
1866         unsigned frac_d = 1;
1867
1868         if (count > (sizeof(kernbuf) - 1))
1869                 return -EINVAL;
1870
1871         if (copy_from_user(kernbuf, buffer, count))
1872                 return -EFAULT;
1873
1874         kernbuf[count] = '\0';
1875         pbuf = kernbuf;
1876         if (*pbuf == '-') {
1877                 mult = -mult;
1878                 pbuf++;
1879         }
1880
1881         whole = simple_strtoull(pbuf, &end, 10);
1882         if (pbuf == end)
1883                 return -EINVAL;
1884
1885         if (end != NULL && *end == '.') {
1886                 int i;
1887                 pbuf = end + 1;
1888
1889                 /* need to limit frac_d to a __u32 */
1890                 if (strlen(pbuf) > 10)
1891                         pbuf[10] = '\0';
1892
1893                 frac = simple_strtoull(pbuf, &end, 10);
1894                 /* count decimal places */
1895                 for (i = 0; i < (end - pbuf); i++)
1896                         frac_d *= 10;
1897         }
1898
1899         units = 1;
1900         switch (*end) {
1901         case 'p': case 'P':
1902                 units <<= 10;
1903         case 't': case 'T':
1904                 units <<= 10;
1905         case 'g': case 'G':
1906                 units <<= 10;
1907         case 'm': case 'M':
1908                 units <<= 10;
1909         case 'k': case 'K':
1910                 units <<= 10;
1911         }
1912         /* Specified units override the multiplier */
1913         if (units)
1914                 mult = mult < 0 ? -units : units;
1915
1916         frac *= mult;
1917         do_div(frac, frac_d);
1918         *val = whole * mult + frac;
1919         return 0;
1920 }
1921 EXPORT_SYMBOL(lprocfs_write_frac_u64_helper);
1922
1923 static char *lprocfs_strnstr(const char *s1, const char *s2, size_t len)
1924 {
1925         size_t l2;
1926
1927         l2 = strlen(s2);
1928         if (!l2)
1929                 return (char *)s1;
1930         while (len >= l2) {
1931                 len--;
1932                 if (!memcmp(s1, s2, l2))
1933                         return (char *)s1;
1934                 s1++;
1935         }
1936         return NULL;
1937 }
1938
1939 /**
1940  * Find the string \a name in the input \a buffer, and return a pointer to the
1941  * value immediately following \a name, reducing \a count appropriately.
1942  * If \a name is not found the original \a buffer is returned.
1943  */
1944 char *lprocfs_find_named_value(const char *buffer, const char *name,
1945                                size_t *count)
1946 {
1947         char *val;
1948         size_t buflen = *count;
1949
1950         /* there is no strnstr() in rhel5 and ubuntu kernels */
1951         val = lprocfs_strnstr(buffer, name, buflen);
1952         if (val == NULL)
1953                 return (char *)buffer;
1954
1955         val += strlen(name);                         /* skip prefix */
1956         while (val < buffer + buflen && isspace(*val)) /* skip separator */
1957                 val++;
1958
1959         *count = 0;
1960         while (val < buffer + buflen && isalnum(*val)) {
1961                 ++*count;
1962                 ++val;
1963         }
1964
1965         return val - *count;
1966 }
1967 EXPORT_SYMBOL(lprocfs_find_named_value);
1968
1969 int lprocfs_seq_create(struct proc_dir_entry *parent,
1970                        const char *name,
1971                        umode_t mode,
1972                        const struct file_operations *seq_fops,
1973                        void *data)
1974 {
1975         struct proc_dir_entry *entry;
1976
1977         /* Disallow secretly (un)writable entries. */
1978         LASSERT((seq_fops->write == NULL) == ((mode & 0222) == 0));
1979         entry = proc_create_data(name, mode, parent, seq_fops, data);
1980
1981         if (entry == NULL)
1982                 return -ENOMEM;
1983
1984         return 0;
1985 }
1986 EXPORT_SYMBOL(lprocfs_seq_create);
1987
1988 int lprocfs_obd_seq_create(struct obd_device *dev,
1989                            const char *name,
1990                            umode_t mode,
1991                            const struct file_operations *seq_fops,
1992                            void *data)
1993 {
1994         return lprocfs_seq_create(dev->obd_proc_entry, name,
1995                                   mode, seq_fops, data);
1996 }
1997 EXPORT_SYMBOL(lprocfs_obd_seq_create);
1998
1999 void lprocfs_oh_tally(struct obd_histogram *oh, unsigned int value)
2000 {
2001         if (value >= OBD_HIST_MAX)
2002                 value = OBD_HIST_MAX - 1;
2003
2004         spin_lock(&oh->oh_lock);
2005         oh->oh_buckets[value]++;
2006         spin_unlock(&oh->oh_lock);
2007 }
2008 EXPORT_SYMBOL(lprocfs_oh_tally);
2009
2010 void lprocfs_oh_tally_log2(struct obd_histogram *oh, unsigned int value)
2011 {
2012         unsigned int val;
2013
2014         for (val = 0; ((1 << val) < value) && (val <= OBD_HIST_MAX); val++)
2015                 ;
2016
2017         lprocfs_oh_tally(oh, val);
2018 }
2019 EXPORT_SYMBOL(lprocfs_oh_tally_log2);
2020
2021 unsigned long lprocfs_oh_sum(struct obd_histogram *oh)
2022 {
2023         unsigned long ret = 0;
2024         int i;
2025
2026         for (i = 0; i < OBD_HIST_MAX; i++)
2027                 ret +=  oh->oh_buckets[i];
2028         return ret;
2029 }
2030 EXPORT_SYMBOL(lprocfs_oh_sum);
2031
2032 void lprocfs_oh_clear(struct obd_histogram *oh)
2033 {
2034         spin_lock(&oh->oh_lock);
2035         memset(oh->oh_buckets, 0, sizeof(oh->oh_buckets));
2036         spin_unlock(&oh->oh_lock);
2037 }
2038 EXPORT_SYMBOL(lprocfs_oh_clear);
2039
2040 int lprocfs_obd_rd_max_pages_per_rpc(struct seq_file *m, void *data)
2041 {
2042         struct obd_device *dev = data;
2043         struct client_obd *cli = &dev->u.cli;
2044         int rc;
2045
2046         client_obd_list_lock(&cli->cl_loi_list_lock);
2047         rc = seq_printf(m, "%d\n", cli->cl_max_pages_per_rpc);
2048         client_obd_list_unlock(&cli->cl_loi_list_lock);
2049         return rc;
2050 }
2051 EXPORT_SYMBOL(lprocfs_obd_rd_max_pages_per_rpc);
2052
2053 #endif