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 #include <linux/ctype.h>
  49
  50 static const char * const obd_connect_names[] = {
  51         "read_only",
  52         "lov_index",
  53         "unused",
  54         "write_grant",
  55         "server_lock",
  56         "version",
  57         "request_portal",
  58         "acl",
  59         "xattr",
  60         "create_on_write",
  61         "truncate_lock",
  62         "initial_transno",
  63         "inode_bit_locks",
  64         "join_file(obsolete)",
  65         "getattr_by_fid",
  66         "no_oh_for_devices",
  67         "remote_client",
  68         "remote_client_by_force",
  69         "max_byte_per_rpc",
  70         "64bit_qdata",
  71         "mds_capability",
  72         "oss_capability",
  73         "early_lock_cancel",
  74         "som",
  75         "adaptive_timeouts",
  76         "lru_resize",
  77         "mds_mds_connection",
  78         "real_conn",
  79         "change_qunit_size",
  80         "alt_checksum_algorithm",
  81         "fid_is_enabled",
  82         "version_recovery",
  83         "pools",
  84         "grant_shrink",
  85         "skip_orphan",
  86         "large_ea",
  87         "full20",
  88         "layout_lock",
  89         "64bithash",
  90         "object_max_bytes",
  91         "imp_recov",
  92         "jobstats",
  93         "umask",
  94         "einprogress",
  95         "grant_param",
  96         "flock_owner",
  97         "lvb_type",
  98         "nanoseconds_times",
  99         "lightweight_conn",
 100         "short_io",
 101         "pingless",
 102         "flock_deadlock",
 103         "disp_stripe",
 104         "unknown",
 105         NULL
 106 };
 107
 108 int obd_connect_flags2str(char *page, int count, __u64 flags, char *sep)
 109 {
 110         __u64 mask = 1;
 111         int i, ret = 0;
 112
 113         for (i = 0; obd_connect_names[i] != NULL; i++, mask <<= 1) {
 114                 if (flags & mask)
 115                         ret += snprintf(page + ret, count - ret, "%s%s",
 116                                         ret ? sep : "", obd_connect_names[i]);
 117         }
 118         if (flags & ~(mask - 1))
 119                 ret += snprintf(page + ret, count - ret,
 120                                 "%sunknown flags %#llx",
 121                                 ret ? sep : "", flags & ~(mask - 1));
 122         return ret;
 123 }
 124 EXPORT_SYMBOL(obd_connect_flags2str);
 125
 126 int lprocfs_read_frac_helper(char *buffer, unsigned long count, long val,
 127                              int mult)
 128 {
 129         long decimal_val, frac_val;
 130         int prtn;
 131
 132         if (count < 10)
 133                 return -EINVAL;
 134
 135         decimal_val = val / mult;
 136         prtn = snprintf(buffer, count, "%ld", decimal_val);
 137         frac_val = val % mult;
 138
 139         if (prtn < (count - 4) && frac_val > 0) {
 140                 long temp_frac;
 141                 int i, temp_mult = 1, frac_bits = 0;
 142
 143                 temp_frac = frac_val * 10;
 144                 buffer[prtn++] = '.';
 145                 while (frac_bits < 2 && (temp_frac / mult) < 1) {
 146                         /* only reserved 2 bits fraction */
 147                         buffer[prtn++] = '0';
 148                         temp_frac *= 10;
 149                         frac_bits++;
 150                 }
 151                 /*
 152                  * Need to think these cases :
 153                  *      1. #echo x.00 > /proc/xxx       output result : x
 154                  *      2. #echo x.0x > /proc/xxx       output result : x.0x
 155                  *      3. #echo x.x0 > /proc/xxx       output result : x.x
 156                  *      4. #echo x.xx > /proc/xxx       output result : x.xx
 157                  *      Only reserved 2 bits fraction.
 158                  */
 159                 for (i = 0; i < (5 - prtn); i++)
 160                         temp_mult *= 10;
 161
 162                 frac_bits = min((int)count - prtn, 3 - frac_bits);
 163                 prtn += snprintf(buffer + prtn, frac_bits, "%ld",
 164                                  frac_val * temp_mult / mult);
 165
 166                 prtn--;
 167                 while (buffer[prtn] < '1' || buffer[prtn] > '9') {
 168                         prtn--;
 169                         if (buffer[prtn] == '.') {
 170                                 prtn--;
 171                                 break;
 172                         }
 173                 }
 174                 prtn++;
 175         }
 176         buffer[prtn++] = '\n';
 177         return prtn;
 178 }
 179 EXPORT_SYMBOL(lprocfs_read_frac_helper);
 180
 181 int lprocfs_write_frac_helper(const char __user *buffer, unsigned long count,
 182                               int *val, int mult)
 183 {
 184         char kernbuf[20], *end, *pbuf;
 185
 186         if (count > (sizeof(kernbuf) - 1))
 187                 return -EINVAL;
 188
 189         if (copy_from_user(kernbuf, buffer, count))
 190                 return -EFAULT;
 191
 192         kernbuf[count] = '\0';
 193         pbuf = kernbuf;
 194         if (*pbuf == '-') {
 195                 mult = -mult;
 196                 pbuf++;
 197         }
 198
 199         *val = (int)simple_strtoul(pbuf, &end, 10) * mult;
 200         if (pbuf == end)
 201                 return -EINVAL;
 202
 203         if (end != NULL && *end == '.') {
 204                 int temp_val, pow = 1;
 205                 int i;
 206
 207                 pbuf = end + 1;
 208                 if (strlen(pbuf) > 5)
 209                         pbuf[5] = '\0'; /*only allow 5bits fractional*/
 210
 211                 temp_val = (int)simple_strtoul(pbuf, &end, 10) * mult;
 212
 213                 if (pbuf < end) {
 214                         for (i = 0; i < (end - pbuf); i++)
 215                                 pow *= 10;
 216
 217                         *val += temp_val / pow;
 218                 }
 219         }
 220         return 0;
 221 }
 222 EXPORT_SYMBOL(lprocfs_write_frac_helper);
 223
 224 #if defined (CONFIG_PROC_FS)
 225
 226 static int lprocfs_no_percpu_stats = 0;
 227 module_param(lprocfs_no_percpu_stats, int, 0644);
 228 MODULE_PARM_DESC(lprocfs_no_percpu_stats, "Do not alloc percpu data for lprocfs stats");
 229
 230 #define MAX_STRING_SIZE 128
 231
 232 int lprocfs_single_release(struct inode *inode, struct file *file)
 233 {
 234         return single_release(inode, file);
 235 }
 236 EXPORT_SYMBOL(lprocfs_single_release);
 237
 238 int lprocfs_seq_release(struct inode *inode, struct file *file)
 239 {
 240         return seq_release(inode, file);
 241 }
 242 EXPORT_SYMBOL(lprocfs_seq_release);
 243
 244 /* lprocfs API calls */
 245
 246 struct proc_dir_entry *lprocfs_add_simple(struct proc_dir_entry *root,
 247                                      char *name, void *data,
 248                                      struct file_operations *fops)
 249 {
 250         struct proc_dir_entry *proc;
 251         umode_t mode = 0;
 252
 253         if (root == NULL || name == NULL || fops == NULL)
 254                 return ERR_PTR(-EINVAL);
 255
 256         if (fops->read)
 257                 mode = 0444;
 258         if (fops->write)
 259                 mode |= 0200;
 260         proc = proc_create_data(name, mode, root, fops, data);
 261         if (!proc) {
 262                 CERROR("LprocFS: No memory to create /proc entry %s", name);
 263                 return ERR_PTR(-ENOMEM);
 264         }
 265         return proc;
 266 }
 267 EXPORT_SYMBOL(lprocfs_add_simple);
 268
 269 struct proc_dir_entry *lprocfs_add_symlink(const char *name,
 270                         struct proc_dir_entry *parent, const char *format, ...)
 271 {
 272         struct proc_dir_entry *entry;
 273         char *dest;
 274         va_list ap;
 275
 276         if (parent == NULL || format == NULL)
 277                 return NULL;
 278
 279         OBD_ALLOC_WAIT(dest, MAX_STRING_SIZE + 1);
 280         if (dest == NULL)
 281                 return NULL;
 282
 283         va_start(ap, format);
 284         vsnprintf(dest, MAX_STRING_SIZE, format, ap);
 285         va_end(ap);
 286
 287         entry = proc_symlink(name, parent, dest);
 288         if (entry == NULL)
 289                 CERROR("LprocFS: Could not create symbolic link from %s to %s",
 290                         name, dest);
 291
 292         OBD_FREE(dest, MAX_STRING_SIZE + 1);
 293         return entry;
 294 }
 295 EXPORT_SYMBOL(lprocfs_add_symlink);
 296
 297 static struct file_operations lprocfs_generic_fops = { };
 298
 299 /**
 300  * Add /proc entries.
 301  *
 302  * \param root [in]  The parent proc entry on which new entry will be added.
 303  * \param list [in]  Array of proc entries to be added.
 304  * \param data [in]  The argument to be passed when entries read/write routines
 305  *                 are called through /proc file.
 306  *
 307  * \retval 0   on success
 308  *       < 0 on error
 309  */
 310 int lprocfs_add_vars(struct proc_dir_entry *root, struct lprocfs_vars *list,
 311                      void *data)
 312 {
 313         if (root == NULL || list == NULL)
 314                 return -EINVAL;
 315
 316         while (list->name != NULL) {
 317                 struct proc_dir_entry *proc;
 318                 umode_t mode = 0;
 319
 320                 if (list->proc_mode != 0000) {
 321                         mode = list->proc_mode;
 322                 } else if (list->fops) {
 323                         if (list->fops->read)
 324                                 mode = 0444;
 325                         if (list->fops->write)
 326                                 mode |= 0200;
 327                 }
 328                 proc = proc_create_data(list->name, mode, root,
 329                                         list->fops ?: &lprocfs_generic_fops,
 330                                         list->data ?: data);
 331                 if (proc == NULL)
 332                         return -ENOMEM;
 333                 list++;
 334         }
 335         return 0;
 336 }
 337 EXPORT_SYMBOL(lprocfs_add_vars);
 338
 339 void lprocfs_remove(struct proc_dir_entry **rooth)
 340 {
 341         proc_remove(*rooth);
 342         *rooth = NULL;
 343 }
 344 EXPORT_SYMBOL(lprocfs_remove);
 345
 346 void lprocfs_remove_proc_entry(const char *name, struct proc_dir_entry *parent)
 347 {
 348         LASSERT(parent != NULL);
 349         remove_proc_entry(name, parent);
 350 }
 351 EXPORT_SYMBOL(lprocfs_remove_proc_entry);
 352
 353 struct proc_dir_entry *lprocfs_register(const char *name,
 354                                         struct proc_dir_entry *parent,
 355                                         struct lprocfs_vars *list, void *data)
 356 {
 357         struct proc_dir_entry *entry;
 358
 359         entry = proc_mkdir(name, parent);
 360         if (entry == NULL) {
 361                 entry = ERR_PTR(-ENOMEM);
 362                 goto out;
 363         }
 364
 365         if (list != NULL) {
 366                 int rc = lprocfs_add_vars(entry, list, data);
 367                 if (rc != 0) {
 368                         lprocfs_remove(&entry);
 369                         entry = ERR_PTR(rc);
 370                 }
 371         }
 372 out:
 373         return entry;
 374 }
 375 EXPORT_SYMBOL(lprocfs_register);
 376
 377 /* Generic callbacks */
 378 int lprocfs_rd_uint(struct seq_file *m, void *data)
 379 {
 380         seq_printf(m, "%u\n", *(unsigned int *)data);
 381         return 0;
 382 }
 383 EXPORT_SYMBOL(lprocfs_rd_uint);
 384
 385 int lprocfs_wr_uint(struct file *file, const char __user *buffer,
 386                     unsigned long count, void *data)
 387 {
 388         unsigned *p = data;
 389         char dummy[MAX_STRING_SIZE + 1], *end;
 390         unsigned long tmp;
 391
 392         dummy[MAX_STRING_SIZE] = '\0';
 393         if (copy_from_user(dummy, buffer, MAX_STRING_SIZE))
 394                 return -EFAULT;
 395
 396         tmp = simple_strtoul(dummy, &end, 0);
 397         if (dummy == end)
 398                 return -EINVAL;
 399
 400         *p = (unsigned int)tmp;
 401         return count;
 402 }
 403 EXPORT_SYMBOL(lprocfs_wr_uint);
 404
 405 int lprocfs_rd_u64(struct seq_file *m, void *data)
 406 {
 407         seq_printf(m, "%llu\n", *(__u64 *)data);
 408         return 0;
 409 }
 410 EXPORT_SYMBOL(lprocfs_rd_u64);
 411
 412 int lprocfs_rd_atomic(struct seq_file *m, void *data)
 413 {
 414         atomic_t *atom = data;
 415         LASSERT(atom != NULL);
 416         seq_printf(m, "%d\n", atomic_read(atom));
 417         return 0;
 418 }
 419 EXPORT_SYMBOL(lprocfs_rd_atomic);
 420
 421 int lprocfs_wr_atomic(struct file *file, const char __user *buffer,
 422                       unsigned long count, void *data)
 423 {
 424         atomic_t *atm = data;
 425         int val = 0;
 426         int rc;
 427
 428         rc = lprocfs_write_helper(buffer, count, &val);
 429         if (rc < 0)
 430                 return rc;
 431
 432         if (val <= 0)
 433                 return -ERANGE;
 434
 435         atomic_set(atm, val);
 436         return count;
 437 }
 438 EXPORT_SYMBOL(lprocfs_wr_atomic);
 439
 440 int lprocfs_rd_uuid(struct seq_file *m, void *data)
 441 {
 442         struct obd_device *obd = data;
 443
 444         LASSERT(obd != NULL);
 445         seq_printf(m, "%s\n", obd->obd_uuid.uuid);
 446         return 0;
 447 }
 448 EXPORT_SYMBOL(lprocfs_rd_uuid);
 449
 450 int lprocfs_rd_name(struct seq_file *m, void *data)
 451 {
 452         struct obd_device *dev = data;
 453
 454         LASSERT(dev != NULL);
 455         seq_printf(m, "%s\n", dev->obd_name);
 456         return 0;
 457 }
 458 EXPORT_SYMBOL(lprocfs_rd_name);
 459
 460 int lprocfs_rd_blksize(struct seq_file *m, void *data)
 461 {
 462         struct obd_device *obd = data;
 463         struct obd_statfs  osfs;
 464         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 465                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 466                             OBD_STATFS_NODELAY);
 467         if (!rc)
 468                 rc = seq_printf(m, "%u\n", osfs.os_bsize);
 469         return rc;
 470 }
 471 EXPORT_SYMBOL(lprocfs_rd_blksize);
 472
 473 int lprocfs_rd_kbytestotal(struct seq_file *m, void *data)
 474 {
 475         struct obd_device *obd = data;
 476         struct obd_statfs  osfs;
 477         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 478                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 479                             OBD_STATFS_NODELAY);
 480         if (!rc) {
 481                 __u32 blk_size = osfs.os_bsize >> 10;
 482                 __u64 result = osfs.os_blocks;
 483
 484                 while (blk_size >>= 1)
 485                         result <<= 1;
 486
 487                 rc = seq_printf(m, "%llu\n", result);
 488         }
 489         return rc;
 490 }
 491 EXPORT_SYMBOL(lprocfs_rd_kbytestotal);
 492
 493 int lprocfs_rd_kbytesfree(struct seq_file *m, void *data)
 494 {
 495         struct obd_device *obd = data;
 496         struct obd_statfs  osfs;
 497         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 498                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 499                             OBD_STATFS_NODELAY);
 500         if (!rc) {
 501                 __u32 blk_size = osfs.os_bsize >> 10;
 502                 __u64 result = osfs.os_bfree;
 503
 504                 while (blk_size >>= 1)
 505                         result <<= 1;
 506
 507                 rc = seq_printf(m, "%llu\n", result);
 508         }
 509         return rc;
 510 }
 511 EXPORT_SYMBOL(lprocfs_rd_kbytesfree);
 512
 513 int lprocfs_rd_kbytesavail(struct seq_file *m, void *data)
 514 {
 515         struct obd_device *obd = data;
 516         struct obd_statfs  osfs;
 517         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 518                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 519                             OBD_STATFS_NODELAY);
 520         if (!rc) {
 521                 __u32 blk_size = osfs.os_bsize >> 10;
 522                 __u64 result = osfs.os_bavail;
 523
 524                 while (blk_size >>= 1)
 525                         result <<= 1;
 526
 527                 rc = seq_printf(m, "%llu\n", result);
 528         }
 529         return rc;
 530 }
 531 EXPORT_SYMBOL(lprocfs_rd_kbytesavail);
 532
 533 int lprocfs_rd_filestotal(struct seq_file *m, void *data)
 534 {
 535         struct obd_device *obd = data;
 536         struct obd_statfs  osfs;
 537         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 538                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 539                             OBD_STATFS_NODELAY);
 540         if (!rc)
 541                 rc = seq_printf(m, "%llu\n", osfs.os_files);
 542
 543         return rc;
 544 }
 545 EXPORT_SYMBOL(lprocfs_rd_filestotal);
 546
 547 int lprocfs_rd_filesfree(struct seq_file *m, void *data)
 548 {
 549         struct obd_device *obd = data;
 550         struct obd_statfs  osfs;
 551         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 552                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 553                             OBD_STATFS_NODELAY);
 554         if (!rc)
 555                 rc = seq_printf(m, "%llu\n", osfs.os_ffree);
 556         return rc;
 557 }
 558 EXPORT_SYMBOL(lprocfs_rd_filesfree);
 559
 560 int lprocfs_rd_server_uuid(struct seq_file *m, void *data)
 561 {
 562         struct obd_device *obd = data;
 563         struct obd_import *imp;
 564         char *imp_state_name = NULL;
 565         int rc = 0;
 566
 567         LASSERT(obd != NULL);
 568         LPROCFS_CLIMP_CHECK(obd);
 569         imp = obd->u.cli.cl_import;
 570         imp_state_name = ptlrpc_import_state_name(imp->imp_state);
 571         rc = seq_printf(m, "%s\t%s%s\n", obd2cli_tgt(obd), imp_state_name,
 572                         imp->imp_deactive ? "\tDEACTIVATED" : "");
 573
 574         LPROCFS_CLIMP_EXIT(obd);
 575         return rc;
 576 }
 577 EXPORT_SYMBOL(lprocfs_rd_server_uuid);
 578
 579 int lprocfs_rd_conn_uuid(struct seq_file *m, void *data)
 580 {
 581         struct obd_device *obd = data;
 582         struct ptlrpc_connection *conn;
 583         int rc = 0;
 584
 585         LASSERT(obd != NULL);
 586
 587         LPROCFS_CLIMP_CHECK(obd);
 588         conn = obd->u.cli.cl_import->imp_connection;
 589         if (conn && obd->u.cli.cl_import)
 590                 rc = seq_printf(m, "%s\n", conn->c_remote_uuid.uuid);
 591         else
 592                 rc = seq_printf(m, "%s\n", "<none>");
 593
 594         LPROCFS_CLIMP_EXIT(obd);
 595         return rc;
 596 }
 597 EXPORT_SYMBOL(lprocfs_rd_conn_uuid);
 598
 599 /** add up per-cpu counters */
 600 void lprocfs_stats_collect(struct lprocfs_stats *stats, int idx,
 601                            struct lprocfs_counter *cnt)
 602 {
 603         unsigned int                    num_entry;
 604         struct lprocfs_counter          *percpu_cntr;
 605         int                             i;
 606         unsigned long                   flags = 0;
 607
 608         memset(cnt, 0, sizeof(*cnt));
 609
 610         if (stats == NULL) {
 611                 /* set count to 1 to avoid divide-by-zero errs in callers */
 612                 cnt->lc_count = 1;
 613                 return;
 614         }
 615
 616         cnt->lc_min = LC_MIN_INIT;
 617
 618         num_entry = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
 619
 620         for (i = 0; i < num_entry; i++) {
 621                 if (stats->ls_percpu[i] == NULL)
 622                         continue;
 623                 percpu_cntr = lprocfs_stats_counter_get(stats, i, idx);
 624
 625                 cnt->lc_count += percpu_cntr->lc_count;
 626                 cnt->lc_sum += percpu_cntr->lc_sum;
 627                 if (percpu_cntr->lc_min < cnt->lc_min)
 628                         cnt->lc_min = percpu_cntr->lc_min;
 629                 if (percpu_cntr->lc_max > cnt->lc_max)
 630                         cnt->lc_max = percpu_cntr->lc_max;
 631                 cnt->lc_sumsquare += percpu_cntr->lc_sumsquare;
 632         }
 633
 634         lprocfs_stats_unlock(stats, LPROCFS_GET_NUM_CPU, &flags);
 635 }
 636 EXPORT_SYMBOL(lprocfs_stats_collect);
 637
 638 /**
 639  * Append a space separated list of current set flags to str.
 640  */
 641 #define flag2str(flag, first)                                           \
 642         do {                                                            \
 643                 if (imp->imp_##flag)                                    \
 644                      seq_printf(m, "%s" #flag, first ? "" : ", ");      \
 645         } while (0)
 646 static int obd_import_flags2str(struct obd_import *imp, struct seq_file *m)
 647 {
 648         bool first = true;
 649
 650         if (imp->imp_obd->obd_no_recov) {
 651                 seq_printf(m, "no_recov");
 652                 first = false;
 653         }
 654
 655         flag2str(invalid, first);
 656         first = false;
 657         flag2str(deactive, first);
 658         flag2str(replayable, first);
 659         flag2str(pingable, first);
 660         return 0;
 661 }
 662 #undef flags2str
 663
 664 static void obd_connect_seq_flags2str(struct seq_file *m, __u64 flags, char *sep)
 665 {
 666         __u64 mask = 1;
 667         int i;
 668         bool first = true;
 669
 670         for (i = 0; obd_connect_names[i] != NULL; i++, mask <<= 1) {
 671                 if (flags & mask) {
 672                         seq_printf(m, "%s%s",
 673                                         first ? sep : "", obd_connect_names[i]);
 674                         first = false;
 675                 }
 676         }
 677         if (flags & ~(mask - 1))
 678                 seq_printf(m, "%sunknown flags %#llx",
 679                                 first ? sep : "", flags & ~(mask - 1));
 680 }
 681
 682 int lprocfs_rd_import(struct seq_file *m, void *data)
 683 {
 684         struct lprocfs_counter          ret;
 685         struct lprocfs_counter_header   *header;
 686         struct obd_device               *obd    = (struct obd_device *)data;
 687         struct obd_import               *imp;
 688         struct obd_import_conn          *conn;
 689         int                             j;
 690         int                             k;
 691         int                             rw      = 0;
 692
 693         LASSERT(obd != NULL);
 694         LPROCFS_CLIMP_CHECK(obd);
 695         imp = obd->u.cli.cl_import;
 696
 697         seq_printf(m,
 698                      "import:\n"
 699                      "    name: %s\n"
 700                      "    target: %s\n"
 701                      "    state: %s\n"
 702                      "    instance: %u\n"
 703                      "    connect_flags: [",
 704                      obd->obd_name,
 705                      obd2cli_tgt(obd),
 706                      ptlrpc_import_state_name(imp->imp_state),
 707                      imp->imp_connect_data.ocd_instance);
 708         obd_connect_seq_flags2str(m, imp->imp_connect_data.ocd_connect_flags, ", ");
 709         seq_printf(m,
 710                       "]\n"
 711                       "    import_flags: [");
 712         obd_import_flags2str(imp, m);
 713
 714         seq_printf(m,
 715                       "]\n"
 716                       "    connection:\n"
 717                       "       failover_nids: [");
 718         spin_lock(&imp->imp_lock);
 719         j = 0;
 720         list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
 721                 seq_printf(m, "%s%s", j ? ", " : "",
 722                            libcfs_nid2str(conn->oic_conn->c_peer.nid));
 723                 j++;
 724         }
 725         seq_printf(m,
 726                       "]\n"
 727                       "       current_connection: %s\n"
 728                       "       connection_attempts: %u\n"
 729                       "       generation: %u\n"
 730                       "       in-progress_invalidations: %u\n",
 731                       imp->imp_connection == NULL ? "<none>" :
 732                               libcfs_nid2str(imp->imp_connection->c_peer.nid),
 733                       imp->imp_conn_cnt,
 734                       imp->imp_generation,
 735                       atomic_read(&imp->imp_inval_count));
 736         spin_unlock(&imp->imp_lock);
 737
 738         if (obd->obd_svc_stats == NULL)
 739                 goto out_climp;
 740
 741         header = &obd->obd_svc_stats->ls_cnt_header[PTLRPC_REQWAIT_CNTR];
 742         lprocfs_stats_collect(obd->obd_svc_stats, PTLRPC_REQWAIT_CNTR, &ret);
 743         if (ret.lc_count != 0) {
 744                 /* first argument to do_div MUST be __u64 */
 745                 __u64 sum = ret.lc_sum;
 746                 do_div(sum, ret.lc_count);
 747                 ret.lc_sum = sum;
 748         } else
 749                 ret.lc_sum = 0;
 750         seq_printf(m,
 751                       "    rpcs:\n"
 752                       "       inflight: %u\n"
 753                       "       unregistering: %u\n"
 754                       "       timeouts: %u\n"
 755                       "       avg_waittime: %llu %s\n",
 756                       atomic_read(&imp->imp_inflight),
 757                       atomic_read(&imp->imp_unregistering),
 758                       atomic_read(&imp->imp_timeouts),
 759                       ret.lc_sum, header->lc_units);
 760
 761         k = 0;
 762         for (j = 0; j < IMP_AT_MAX_PORTALS; j++) {
 763                 if (imp->imp_at.iat_portal[j] == 0)
 764                         break;
 765                 k = max_t(unsigned int, k,
 766                           at_get(&imp->imp_at.iat_service_estimate[j]));
 767         }
 768         seq_printf(m,
 769                       "    service_estimates:\n"
 770                       "       services: %u sec\n"
 771                       "       network: %u sec\n",
 772                       k,
 773                       at_get(&imp->imp_at.iat_net_latency));
 774
 775         seq_printf(m,
 776                       "    transactions:\n"
 777                       "       last_replay: %llu\n"
 778                       "       peer_committed: %llu\n"
 779                       "       last_checked: %llu\n",
 780                       imp->imp_last_replay_transno,
 781                       imp->imp_peer_committed_transno,
 782                       imp->imp_last_transno_checked);
 783
 784         /* avg data rates */
 785         for (rw = 0; rw <= 1; rw++) {
 786                 lprocfs_stats_collect(obd->obd_svc_stats,
 787                                       PTLRPC_LAST_CNTR + BRW_READ_BYTES + rw,
 788                                       &ret);
 789                 if (ret.lc_sum > 0 && ret.lc_count > 0) {
 790                         /* first argument to do_div MUST be __u64 */
 791                         __u64 sum = ret.lc_sum;
 792                         do_div(sum, ret.lc_count);
 793                         ret.lc_sum = sum;
 794                         seq_printf(m,
 795                                       "    %s_data_averages:\n"
 796                                       "       bytes_per_rpc: %llu\n",
 797                                       rw ? "write" : "read",
 798                                       ret.lc_sum);
 799                 }
 800                 k = (int)ret.lc_sum;
 801                 j = opcode_offset(OST_READ + rw) + EXTRA_MAX_OPCODES;
 802                 header = &obd->obd_svc_stats->ls_cnt_header[j];
 803                 lprocfs_stats_collect(obd->obd_svc_stats, j, &ret);
 804                 if (ret.lc_sum > 0 && ret.lc_count != 0) {
 805                         /* first argument to do_div MUST be __u64 */
 806                         __u64 sum = ret.lc_sum;
 807                         do_div(sum, ret.lc_count);
 808                         ret.lc_sum = sum;
 809                         seq_printf(m,
 810                                       "       %s_per_rpc: %llu\n",
 811                                       header->lc_units, ret.lc_sum);
 812                         j = (int)ret.lc_sum;
 813                         if (j > 0)
 814                                 seq_printf(m,
 815                                               "       MB_per_sec: %u.%.02u\n",
 816                                               k / j, (100 * k / j) % 100);
 817                 }
 818         }
 819
 820 out_climp:
 821         LPROCFS_CLIMP_EXIT(obd);
 822         return 0;
 823 }
 824 EXPORT_SYMBOL(lprocfs_rd_import);
 825
 826 int lprocfs_rd_state(struct seq_file *m, void *data)
 827 {
 828         struct obd_device *obd = (struct obd_device *)data;
 829         struct obd_import *imp;
 830         int j, k;
 831
 832         LASSERT(obd != NULL);
 833         LPROCFS_CLIMP_CHECK(obd);
 834         imp = obd->u.cli.cl_import;
 835
 836         seq_printf(m, "current_state: %s\n",
 837                      ptlrpc_import_state_name(imp->imp_state));
 838         seq_printf(m, "state_history:\n");
 839         k = imp->imp_state_hist_idx;
 840         for (j = 0; j < IMP_STATE_HIST_LEN; j++) {
 841                 struct import_state_hist *ish =
 842                         &imp->imp_state_hist[(k + j) % IMP_STATE_HIST_LEN];
 843                 if (ish->ish_state == 0)
 844                         continue;
 845                 seq_printf(m, " - ["CFS_TIME_T", %s]\n",
 846                               ish->ish_time,
 847                               ptlrpc_import_state_name(ish->ish_state));
 848         }
 849
 850         LPROCFS_CLIMP_EXIT(obd);
 851         return 0;
 852 }
 853 EXPORT_SYMBOL(lprocfs_rd_state);
 854
 855 int lprocfs_at_hist_helper(struct seq_file *m, struct adaptive_timeout *at)
 856 {
 857         int i;
 858         for (i = 0; i < AT_BINS; i++)
 859                 seq_printf(m, "%3u ", at->at_hist[i]);
 860         seq_printf(m, "\n");
 861         return 0;
 862 }
 863 EXPORT_SYMBOL(lprocfs_at_hist_helper);
 864
 865 /* See also ptlrpc_lprocfs_rd_timeouts */
 866 int lprocfs_rd_timeouts(struct seq_file *m, void *data)
 867 {
 868         struct obd_device *obd = (struct obd_device *)data;
 869         struct obd_import *imp;
 870         unsigned int cur, worst;
 871         time_t now, worstt;
 872         struct dhms ts;
 873         int i;
 874
 875         LASSERT(obd != NULL);
 876         LPROCFS_CLIMP_CHECK(obd);
 877         imp = obd->u.cli.cl_import;
 878
 879         now = get_seconds();
 880
 881         /* Some network health info for kicks */
 882         s2dhms(&ts, now - imp->imp_last_reply_time);
 883         seq_printf(m, "%-10s : %ld, "DHMS_FMT" ago\n",
 884                        "last reply", imp->imp_last_reply_time, DHMS_VARS(&ts));
 885
 886         cur = at_get(&imp->imp_at.iat_net_latency);
 887         worst = imp->imp_at.iat_net_latency.at_worst_ever;
 888         worstt = imp->imp_at.iat_net_latency.at_worst_time;
 889         s2dhms(&ts, now - worstt);
 890         seq_printf(m, "%-10s : cur %3u  worst %3u (at %ld, "DHMS_FMT" ago) ",
 891                        "network", cur, worst, worstt, DHMS_VARS(&ts));
 892         lprocfs_at_hist_helper(m, &imp->imp_at.iat_net_latency);
 893
 894         for (i = 0; i < IMP_AT_MAX_PORTALS; i++) {
 895                 if (imp->imp_at.iat_portal[i] == 0)
 896                         break;
 897                 cur = at_get(&imp->imp_at.iat_service_estimate[i]);
 898                 worst = imp->imp_at.iat_service_estimate[i].at_worst_ever;
 899                 worstt = imp->imp_at.iat_service_estimate[i].at_worst_time;
 900                 s2dhms(&ts, now - worstt);
 901                 seq_printf(m, "portal %-2d  : cur %3u  worst %3u (at %ld, "
 902                                DHMS_FMT" ago) ", imp->imp_at.iat_portal[i],
 903                                cur, worst, worstt, DHMS_VARS(&ts));
 904                 lprocfs_at_hist_helper(m, &imp->imp_at.iat_service_estimate[i]);
 905         }
 906
 907         LPROCFS_CLIMP_EXIT(obd);
 908         return 0;
 909 }
 910 EXPORT_SYMBOL(lprocfs_rd_timeouts);
 911
 912 int lprocfs_rd_connect_flags(struct seq_file *m, void *data)
 913 {
 914         struct obd_device *obd = data;
 915         __u64 flags;
 916
 917         LPROCFS_CLIMP_CHECK(obd);
 918         flags = obd->u.cli.cl_import->imp_connect_data.ocd_connect_flags;
 919         seq_printf(m, "flags=%#llx\n", flags);
 920         obd_connect_seq_flags2str(m, flags, "\n");
 921         seq_printf(m, "\n");
 922         LPROCFS_CLIMP_EXIT(obd);
 923         return 0;
 924 }
 925 EXPORT_SYMBOL(lprocfs_rd_connect_flags);
 926
 927 int lprocfs_rd_num_exports(struct seq_file *m, void *data)
 928 {
 929         struct obd_device *obd = data;
 930
 931         LASSERT(obd != NULL);
 932         seq_printf(m, "%u\n", obd->obd_num_exports);
 933         return 0;
 934 }
 935 EXPORT_SYMBOL(lprocfs_rd_num_exports);
 936
 937 int lprocfs_rd_numrefs(struct seq_file *m, void *data)
 938 {
 939         struct obd_type *class = (struct obd_type *) data;
 940
 941         LASSERT(class != NULL);
 942         seq_printf(m, "%d\n", class->typ_refcnt);
 943         return 0;
 944 }
 945 EXPORT_SYMBOL(lprocfs_rd_numrefs);
 946
 947 int lprocfs_obd_setup(struct obd_device *obd, struct lprocfs_vars *list)
 948 {
 949         int rc = 0;
 950
 951         LASSERT(obd != NULL);
 952         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 953         LASSERT(obd->obd_type->typ_procroot != NULL);
 954
 955         obd->obd_proc_entry = lprocfs_register(obd->obd_name,
 956                                                obd->obd_type->typ_procroot,
 957                                                list, obd);
 958         if (IS_ERR(obd->obd_proc_entry)) {
 959                 rc = PTR_ERR(obd->obd_proc_entry);
 960                 CERROR("error %d setting up lprocfs for %s\n",
 961                        rc, obd->obd_name);
 962                 obd->obd_proc_entry = NULL;
 963         }
 964         return rc;
 965 }
 966 EXPORT_SYMBOL(lprocfs_obd_setup);
 967
 968 int lprocfs_obd_cleanup(struct obd_device *obd)
 969 {
 970         if (!obd)
 971                 return -EINVAL;
 972         if (obd->obd_proc_exports_entry) {
 973                 /* Should be no exports left */
 974                 lprocfs_remove(&obd->obd_proc_exports_entry);
 975                 obd->obd_proc_exports_entry = NULL;
 976         }
 977         if (obd->obd_proc_entry) {
 978                 lprocfs_remove(&obd->obd_proc_entry);
 979                 obd->obd_proc_entry = NULL;
 980         }
 981         return 0;
 982 }
 983 EXPORT_SYMBOL(lprocfs_obd_cleanup);
 984
 985 static void lprocfs_free_client_stats(struct nid_stat *client_stat)
 986 {
 987         CDEBUG(D_CONFIG, "stat %p - data %p/%p\n", client_stat,
 988                client_stat->nid_proc, client_stat->nid_stats);
 989
 990         LASSERTF(atomic_read(&client_stat->nid_exp_ref_count) == 0,
 991                  "nid %s:count %d\n", libcfs_nid2str(client_stat->nid),
 992                  atomic_read(&client_stat->nid_exp_ref_count));
 993
 994         if (client_stat->nid_proc)
 995                 lprocfs_remove(&client_stat->nid_proc);
 996
 997         if (client_stat->nid_stats)
 998                 lprocfs_free_stats(&client_stat->nid_stats);
 999
1000         if (client_stat->nid_ldlm_stats)
1001                 lprocfs_free_stats(&client_stat->nid_ldlm_stats);
1002
1003         OBD_FREE_PTR(client_stat);
1004         return;
1005
1006 }
1007
1008 void lprocfs_free_per_client_stats(struct obd_device *obd)
1009 {
1010         struct cfs_hash *hash = obd->obd_nid_stats_hash;
1011         struct nid_stat *stat;
1012
1013         /* we need extra list - because hash_exit called to early */
1014         /* not need locking because all clients is died */
1015         while (!list_empty(&obd->obd_nid_stats)) {
1016                 stat = list_entry(obd->obd_nid_stats.next,
1017                                       struct nid_stat, nid_list);
1018                 list_del_init(&stat->nid_list);
1019                 cfs_hash_del(hash, &stat->nid, &stat->nid_hash);
1020                 lprocfs_free_client_stats(stat);
1021         }
1022 }
1023 EXPORT_SYMBOL(lprocfs_free_per_client_stats);
1024
1025 int lprocfs_stats_alloc_one(struct lprocfs_stats *stats, unsigned int cpuid)
1026 {
1027         struct lprocfs_counter  *cntr;
1028         unsigned int            percpusize;
1029         int                     rc = -ENOMEM;
1030         unsigned long           flags = 0;
1031         int                     i;
1032
1033         LASSERT(stats->ls_percpu[cpuid] == NULL);
1034         LASSERT((stats->ls_flags & LPROCFS_STATS_FLAG_NOPERCPU) == 0);
1035
1036         percpusize = lprocfs_stats_counter_size(stats);
1037         LIBCFS_ALLOC_ATOMIC(stats->ls_percpu[cpuid], percpusize);
1038         if (stats->ls_percpu[cpuid] != NULL) {
1039                 rc = 0;
1040                 if (unlikely(stats->ls_biggest_alloc_num <= cpuid)) {
1041                         if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE)
1042                                 spin_lock_irqsave(&stats->ls_lock, flags);
1043                         else
1044                                 spin_lock(&stats->ls_lock);
1045                         if (stats->ls_biggest_alloc_num <= cpuid)
1046                                 stats->ls_biggest_alloc_num = cpuid + 1;
1047                         if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE)
1048                                 spin_unlock_irqrestore(&stats->ls_lock, flags);
1049                         else
1050                                 spin_unlock(&stats->ls_lock);
1051                 }
1052                 /* initialize the ls_percpu[cpuid] non-zero counter */
1053                 for (i = 0; i < stats->ls_num; ++i) {
1054                         cntr = lprocfs_stats_counter_get(stats, cpuid, i);
1055                         cntr->lc_min = LC_MIN_INIT;
1056                 }
1057         }
1058         return rc;
1059 }
1060 EXPORT_SYMBOL(lprocfs_stats_alloc_one);
1061
1062 struct lprocfs_stats *lprocfs_alloc_stats(unsigned int num,
1063                                           enum lprocfs_stats_flags flags)
1064 {
1065         struct lprocfs_stats    *stats;
1066         unsigned int            num_entry;
1067         unsigned int            percpusize = 0;
1068         int                     i;
1069
1070         if (num == 0)
1071                 return NULL;
1072
1073         if (lprocfs_no_percpu_stats != 0)
1074                 flags |= LPROCFS_STATS_FLAG_NOPERCPU;
1075
1076         if (flags & LPROCFS_STATS_FLAG_NOPERCPU)
1077                 num_entry = 1;
1078         else
1079                 num_entry = num_possible_cpus();
1080
1081         /* alloc percpu pointers for all possible cpu slots */
1082         LIBCFS_ALLOC(stats, offsetof(typeof(*stats), ls_percpu[num_entry]));
1083         if (stats == NULL)
1084                 return NULL;
1085
1086         stats->ls_num = num;
1087         stats->ls_flags = flags;
1088         spin_lock_init(&stats->ls_lock);
1089
1090         /* alloc num of counter headers */
1091         LIBCFS_ALLOC(stats->ls_cnt_header,
1092                      stats->ls_num * sizeof(struct lprocfs_counter_header));
1093         if (stats->ls_cnt_header == NULL)
1094                 goto fail;
1095
1096         if ((flags & LPROCFS_STATS_FLAG_NOPERCPU) != 0) {
1097                 /* contains only one set counters */
1098                 percpusize = lprocfs_stats_counter_size(stats);
1099                 LIBCFS_ALLOC_ATOMIC(stats->ls_percpu[0], percpusize);
1100                 if (stats->ls_percpu[0] == NULL)
1101                         goto fail;
1102                 stats->ls_biggest_alloc_num = 1;
1103         } else if ((flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0) {
1104                 /* alloc all percpu data, currently only obd_memory use this */
1105                 for (i = 0; i < num_entry; ++i)
1106                         if (lprocfs_stats_alloc_one(stats, i) < 0)
1107                                 goto fail;
1108         }
1109
1110         return stats;
1111
1112 fail:
1113         lprocfs_free_stats(&stats);
1114         return NULL;
1115 }
1116 EXPORT_SYMBOL(lprocfs_alloc_stats);
1117
1118 void lprocfs_free_stats(struct lprocfs_stats **statsh)
1119 {
1120         struct lprocfs_stats *stats = *statsh;
1121         unsigned int num_entry;
1122         unsigned int percpusize;
1123         unsigned int i;
1124
1125         if (stats == NULL || stats->ls_num == 0)
1126                 return;
1127         *statsh = NULL;
1128
1129         if (stats->ls_flags & LPROCFS_STATS_FLAG_NOPERCPU)
1130                 num_entry = 1;
1131         else
1132                 num_entry = num_possible_cpus();
1133
1134         percpusize = lprocfs_stats_counter_size(stats);
1135         for (i = 0; i < num_entry; i++)
1136                 if (stats->ls_percpu[i] != NULL)
1137                         LIBCFS_FREE(stats->ls_percpu[i], percpusize);
1138         if (stats->ls_cnt_header != NULL)
1139                 LIBCFS_FREE(stats->ls_cnt_header, stats->ls_num *
1140                                         sizeof(struct lprocfs_counter_header));
1141         LIBCFS_FREE(stats, offsetof(typeof(*stats), ls_percpu[num_entry]));
1142 }
1143 EXPORT_SYMBOL(lprocfs_free_stats);
1144
1145 void lprocfs_clear_stats(struct lprocfs_stats *stats)
1146 {
1147         struct lprocfs_counter          *percpu_cntr;
1148         int                             i;
1149         int                             j;
1150         unsigned int                    num_entry;
1151         unsigned long                   flags = 0;
1152
1153         num_entry = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
1154
1155         for (i = 0; i < num_entry; i++) {
1156                 if (stats->ls_percpu[i] == NULL)
1157                         continue;
1158                 for (j = 0; j < stats->ls_num; j++) {
1159                         percpu_cntr = lprocfs_stats_counter_get(stats, i, j);
1160                         percpu_cntr->lc_count           = 0;
1161                         percpu_cntr->lc_min             = LC_MIN_INIT;
1162                         percpu_cntr->lc_max             = 0;
1163                         percpu_cntr->lc_sumsquare       = 0;
1164                         percpu_cntr->lc_sum             = 0;
1165                         if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE)
1166                                 percpu_cntr->lc_sum_irq = 0;
1167                 }
1168         }
1169
1170         lprocfs_stats_unlock(stats, LPROCFS_GET_NUM_CPU, &flags);
1171 }
1172 EXPORT_SYMBOL(lprocfs_clear_stats);
1173
1174 static ssize_t lprocfs_stats_seq_write(struct file *file,
1175                                        const char __user *buf,
1176                                        size_t len, loff_t *off)
1177 {
1178         struct seq_file *seq = file->private_data;
1179         struct lprocfs_stats *stats = seq->private;
1180
1181         lprocfs_clear_stats(stats);
1182
1183         return len;
1184 }
1185
1186 static void *lprocfs_stats_seq_start(struct seq_file *p, loff_t *pos)
1187 {
1188         struct lprocfs_stats *stats = p->private;
1189
1190         return (*pos < stats->ls_num) ? pos : NULL;
1191 }
1192
1193 static void lprocfs_stats_seq_stop(struct seq_file *p, void *v)
1194 {
1195 }
1196
1197 static void *lprocfs_stats_seq_next(struct seq_file *p, void *v, loff_t *pos)
1198 {
1199         (*pos)++;
1200         return lprocfs_stats_seq_start(p, pos);
1201 }
1202
1203 /* seq file export of one lprocfs counter */
1204 static int lprocfs_stats_seq_show(struct seq_file *p, void *v)
1205 {
1206         struct lprocfs_stats            *stats  = p->private;
1207         struct lprocfs_counter_header   *hdr;
1208         struct lprocfs_counter           ctr;
1209         int                              idx    = *(loff_t *)v;
1210         int                              rc     = 0;
1211
1212         if (idx == 0) {
1213                 struct timeval now;
1214                 do_gettimeofday(&now);
1215                 rc = seq_printf(p, "%-25s %lu.%lu secs.usecs\n",
1216                                 "snapshot_time", now.tv_sec, (unsigned long)now.tv_usec);
1217                 if (rc < 0)
1218                         return rc;
1219         }
1220         hdr = &stats->ls_cnt_header[idx];
1221         lprocfs_stats_collect(stats, idx, &ctr);
1222
1223         if (ctr.lc_count == 0)
1224                 goto out;
1225
1226         rc = seq_printf(p, "%-25s %lld samples [%s]", hdr->lc_name,
1227                         ctr.lc_count, hdr->lc_units);
1228
1229         if (rc < 0)
1230                 goto out;
1231
1232         if ((hdr->lc_config & LPROCFS_CNTR_AVGMINMAX) && (ctr.lc_count > 0)) {
1233                 rc = seq_printf(p, " %lld %lld %lld",
1234                                 ctr.lc_min, ctr.lc_max, ctr.lc_sum);
1235                 if (rc < 0)
1236                         goto out;
1237                 if (hdr->lc_config & LPROCFS_CNTR_STDDEV)
1238                         rc = seq_printf(p, " %lld", ctr.lc_sumsquare);
1239                 if (rc < 0)
1240                         goto out;
1241         }
1242         rc = seq_printf(p, "\n");
1243 out:
1244         return (rc < 0) ? rc : 0;
1245 }
1246
1247 static const struct seq_operations lprocfs_stats_seq_sops = {
1248         .start  = lprocfs_stats_seq_start,
1249         .stop   = lprocfs_stats_seq_stop,
1250         .next   = lprocfs_stats_seq_next,
1251         .show   = lprocfs_stats_seq_show,
1252 };
1253
1254 static int lprocfs_stats_seq_open(struct inode *inode, struct file *file)
1255 {
1256         struct seq_file *seq;
1257         int rc;
1258
1259         rc = seq_open(file, &lprocfs_stats_seq_sops);
1260         if (rc)
1261                 return rc;
1262         seq = file->private_data;
1263         seq->private = PDE_DATA(inode);
1264         return 0;
1265 }
1266
1267 struct file_operations lprocfs_stats_seq_fops = {
1268         .owner   = THIS_MODULE,
1269         .open    = lprocfs_stats_seq_open,
1270         .read    = seq_read,
1271         .write   = lprocfs_stats_seq_write,
1272         .llseek  = seq_lseek,
1273         .release = lprocfs_seq_release,
1274 };
1275
1276 int lprocfs_register_stats(struct proc_dir_entry *root, const char *name,
1277                            struct lprocfs_stats *stats)
1278 {
1279         struct proc_dir_entry *entry;
1280         LASSERT(root != NULL);
1281
1282         entry = proc_create_data(name, 0644, root,
1283                                  &lprocfs_stats_seq_fops, stats);
1284         if (entry == NULL)
1285                 return -ENOMEM;
1286
1287         return 0;
1288 }
1289 EXPORT_SYMBOL(lprocfs_register_stats);
1290
1291 void lprocfs_counter_init(struct lprocfs_stats *stats, int index,
1292                           unsigned conf, const char *name, const char *units)
1293 {
1294         struct lprocfs_counter_header   *header;
1295         struct lprocfs_counter          *percpu_cntr;
1296         unsigned long                   flags = 0;
1297         unsigned int                    i;
1298         unsigned int                    num_cpu;
1299
1300         LASSERT(stats != NULL);
1301
1302         header = &stats->ls_cnt_header[index];
1303         LASSERTF(header != NULL, "Failed to allocate stats header:[%d]%s/%s\n",
1304                  index, name, units);
1305
1306         header->lc_config = conf;
1307         header->lc_name   = name;
1308         header->lc_units  = units;
1309
1310         num_cpu = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
1311         for (i = 0; i < num_cpu; ++i) {
1312                 if (stats->ls_percpu[i] == NULL)
1313                         continue;
1314                 percpu_cntr = lprocfs_stats_counter_get(stats, i, index);
1315                 percpu_cntr->lc_count           = 0;
1316                 percpu_cntr->lc_min             = LC_MIN_INIT;
1317                 percpu_cntr->lc_max             = 0;
1318                 percpu_cntr->lc_sumsquare       = 0;
1319                 percpu_cntr->lc_sum             = 0;
1320                 if ((stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0)
1321                         percpu_cntr->lc_sum_irq = 0;
1322         }
1323         lprocfs_stats_unlock(stats, LPROCFS_GET_NUM_CPU, &flags);
1324 }
1325 EXPORT_SYMBOL(lprocfs_counter_init);
1326
1327 #define LPROCFS_OBD_OP_INIT(base, stats, op)                           \
1328 do {                                                                   \
1329         unsigned int coffset = base + OBD_COUNTER_OFFSET(op);         \
1330         LASSERT(coffset < stats->ls_num);                                 \
1331         lprocfs_counter_init(stats, coffset, 0, #op, "reqs");         \
1332 } while (0)
1333
1334 void lprocfs_init_ops_stats(int num_private_stats, struct lprocfs_stats *stats)
1335 {
1336         LPROCFS_OBD_OP_INIT(num_private_stats, stats, iocontrol);
1337         LPROCFS_OBD_OP_INIT(num_private_stats, stats, get_info);
1338         LPROCFS_OBD_OP_INIT(num_private_stats, stats, set_info_async);
1339         LPROCFS_OBD_OP_INIT(num_private_stats, stats, attach);
1340         LPROCFS_OBD_OP_INIT(num_private_stats, stats, detach);
1341         LPROCFS_OBD_OP_INIT(num_private_stats, stats, setup);
1342         LPROCFS_OBD_OP_INIT(num_private_stats, stats, precleanup);
1343         LPROCFS_OBD_OP_INIT(num_private_stats, stats, cleanup);
1344         LPROCFS_OBD_OP_INIT(num_private_stats, stats, process_config);
1345         LPROCFS_OBD_OP_INIT(num_private_stats, stats, postrecov);
1346         LPROCFS_OBD_OP_INIT(num_private_stats, stats, add_conn);
1347         LPROCFS_OBD_OP_INIT(num_private_stats, stats, del_conn);
1348         LPROCFS_OBD_OP_INIT(num_private_stats, stats, connect);
1349         LPROCFS_OBD_OP_INIT(num_private_stats, stats, reconnect);
1350         LPROCFS_OBD_OP_INIT(num_private_stats, stats, disconnect);
1351         LPROCFS_OBD_OP_INIT(num_private_stats, stats, fid_init);
1352         LPROCFS_OBD_OP_INIT(num_private_stats, stats, fid_fini);
1353         LPROCFS_OBD_OP_INIT(num_private_stats, stats, fid_alloc);
1354         LPROCFS_OBD_OP_INIT(num_private_stats, stats, statfs);
1355         LPROCFS_OBD_OP_INIT(num_private_stats, stats, statfs_async);
1356         LPROCFS_OBD_OP_INIT(num_private_stats, stats, packmd);
1357         LPROCFS_OBD_OP_INIT(num_private_stats, stats, unpackmd);
1358         LPROCFS_OBD_OP_INIT(num_private_stats, stats, preallocate);
1359         LPROCFS_OBD_OP_INIT(num_private_stats, stats, create);
1360         LPROCFS_OBD_OP_INIT(num_private_stats, stats, destroy);
1361         LPROCFS_OBD_OP_INIT(num_private_stats, stats, setattr);
1362         LPROCFS_OBD_OP_INIT(num_private_stats, stats, setattr_async);
1363         LPROCFS_OBD_OP_INIT(num_private_stats, stats, getattr);
1364         LPROCFS_OBD_OP_INIT(num_private_stats, stats, getattr_async);
1365         LPROCFS_OBD_OP_INIT(num_private_stats, stats, adjust_kms);
1366         LPROCFS_OBD_OP_INIT(num_private_stats, stats, preprw);
1367         LPROCFS_OBD_OP_INIT(num_private_stats, stats, commitrw);
1368         LPROCFS_OBD_OP_INIT(num_private_stats, stats, find_cbdata);
1369         LPROCFS_OBD_OP_INIT(num_private_stats, stats, init_export);
1370         LPROCFS_OBD_OP_INIT(num_private_stats, stats, destroy_export);
1371         LPROCFS_OBD_OP_INIT(num_private_stats, stats, import_event);
1372         LPROCFS_OBD_OP_INIT(num_private_stats, stats, notify);
1373         LPROCFS_OBD_OP_INIT(num_private_stats, stats, health_check);
1374         LPROCFS_OBD_OP_INIT(num_private_stats, stats, get_uuid);
1375         LPROCFS_OBD_OP_INIT(num_private_stats, stats, quotacheck);
1376         LPROCFS_OBD_OP_INIT(num_private_stats, stats, quotactl);
1377         LPROCFS_OBD_OP_INIT(num_private_stats, stats, pool_new);
1378         LPROCFS_OBD_OP_INIT(num_private_stats, stats, pool_rem);
1379         LPROCFS_OBD_OP_INIT(num_private_stats, stats, pool_add);
1380         LPROCFS_OBD_OP_INIT(num_private_stats, stats, pool_del);
1381         LPROCFS_OBD_OP_INIT(num_private_stats, stats, getref);
1382         LPROCFS_OBD_OP_INIT(num_private_stats, stats, putref);
1383 }
1384 EXPORT_SYMBOL(lprocfs_init_ops_stats);
1385
1386 int lprocfs_alloc_obd_stats(struct obd_device *obd, unsigned num_private_stats)
1387 {
1388         struct lprocfs_stats *stats;
1389         unsigned int num_stats;
1390         int rc, i;
1391
1392         LASSERT(obd->obd_stats == NULL);
1393         LASSERT(obd->obd_proc_entry != NULL);
1394         LASSERT(obd->obd_cntr_base == 0);
1395
1396         num_stats = ((int)sizeof(*obd->obd_type->typ_dt_ops) / sizeof(void *)) +
1397                 num_private_stats - 1 /* o_owner */;
1398         stats = lprocfs_alloc_stats(num_stats, 0);
1399         if (stats == NULL)
1400                 return -ENOMEM;
1401
1402         lprocfs_init_ops_stats(num_private_stats, stats);
1403
1404         for (i = num_private_stats; i < num_stats; i++) {
1405                 /* If this LBUGs, it is likely that an obd
1406                  * operation was added to struct obd_ops in
1407                  * <obd.h>, and that the corresponding line item
1408                  * LPROCFS_OBD_OP_INIT(.., .., opname)
1409                  * is missing from the list above. */
1410                 LASSERTF(stats->ls_cnt_header[i].lc_name != NULL,
1411                          "Missing obd_stat initializer obd_op operation at offset %d.\n",
1412                          i - num_private_stats);
1413         }
1414         rc = lprocfs_register_stats(obd->obd_proc_entry, "stats", stats);
1415         if (rc < 0) {
1416                 lprocfs_free_stats(&stats);
1417         } else {
1418                 obd->obd_stats  = stats;
1419                 obd->obd_cntr_base = num_private_stats;
1420         }
1421         return rc;
1422 }
1423 EXPORT_SYMBOL(lprocfs_alloc_obd_stats);
1424
1425 void lprocfs_free_obd_stats(struct obd_device *obd)
1426 {
1427         if (obd->obd_stats)
1428                 lprocfs_free_stats(&obd->obd_stats);
1429 }
1430 EXPORT_SYMBOL(lprocfs_free_obd_stats);
1431
1432 #define LPROCFS_MD_OP_INIT(base, stats, op)                          \
1433 do {                                                                \
1434         unsigned int coffset = base + MD_COUNTER_OFFSET(op);        \
1435         LASSERT(coffset < stats->ls_num);                              \
1436         lprocfs_counter_init(stats, coffset, 0, #op, "reqs");      \
1437 } while (0)
1438
1439 void lprocfs_init_mps_stats(int num_private_stats, struct lprocfs_stats *stats)
1440 {
1441         LPROCFS_MD_OP_INIT(num_private_stats, stats, getstatus);
1442         LPROCFS_MD_OP_INIT(num_private_stats, stats, null_inode);
1443         LPROCFS_MD_OP_INIT(num_private_stats, stats, find_cbdata);
1444         LPROCFS_MD_OP_INIT(num_private_stats, stats, close);
1445         LPROCFS_MD_OP_INIT(num_private_stats, stats, create);
1446         LPROCFS_MD_OP_INIT(num_private_stats, stats, done_writing);
1447         LPROCFS_MD_OP_INIT(num_private_stats, stats, enqueue);
1448         LPROCFS_MD_OP_INIT(num_private_stats, stats, getattr);
1449         LPROCFS_MD_OP_INIT(num_private_stats, stats, getattr_name);
1450         LPROCFS_MD_OP_INIT(num_private_stats, stats, intent_lock);
1451         LPROCFS_MD_OP_INIT(num_private_stats, stats, link);
1452         LPROCFS_MD_OP_INIT(num_private_stats, stats, rename);
1453         LPROCFS_MD_OP_INIT(num_private_stats, stats, is_subdir);
1454         LPROCFS_MD_OP_INIT(num_private_stats, stats, setattr);
1455         LPROCFS_MD_OP_INIT(num_private_stats, stats, sync);
1456         LPROCFS_MD_OP_INIT(num_private_stats, stats, readpage);
1457         LPROCFS_MD_OP_INIT(num_private_stats, stats, unlink);
1458         LPROCFS_MD_OP_INIT(num_private_stats, stats, setxattr);
1459         LPROCFS_MD_OP_INIT(num_private_stats, stats, getxattr);
1460         LPROCFS_MD_OP_INIT(num_private_stats, stats, init_ea_size);
1461         LPROCFS_MD_OP_INIT(num_private_stats, stats, get_lustre_md);
1462         LPROCFS_MD_OP_INIT(num_private_stats, stats, free_lustre_md);
1463         LPROCFS_MD_OP_INIT(num_private_stats, stats, set_open_replay_data);
1464         LPROCFS_MD_OP_INIT(num_private_stats, stats, clear_open_replay_data);
1465         LPROCFS_MD_OP_INIT(num_private_stats, stats, set_lock_data);
1466         LPROCFS_MD_OP_INIT(num_private_stats, stats, lock_match);
1467         LPROCFS_MD_OP_INIT(num_private_stats, stats, cancel_unused);
1468         LPROCFS_MD_OP_INIT(num_private_stats, stats, renew_capa);
1469         LPROCFS_MD_OP_INIT(num_private_stats, stats, unpack_capa);
1470         LPROCFS_MD_OP_INIT(num_private_stats, stats, get_remote_perm);
1471         LPROCFS_MD_OP_INIT(num_private_stats, stats, intent_getattr_async);
1472         LPROCFS_MD_OP_INIT(num_private_stats, stats, revalidate_lock);
1473 }
1474 EXPORT_SYMBOL(lprocfs_init_mps_stats);
1475
1476 int lprocfs_alloc_md_stats(struct obd_device *obd,
1477                            unsigned num_private_stats)
1478 {
1479         struct lprocfs_stats *stats;
1480         unsigned int num_stats;
1481         int rc, i;
1482
1483         LASSERT(obd->md_stats == NULL);
1484         LASSERT(obd->obd_proc_entry != NULL);
1485         LASSERT(obd->md_cntr_base == 0);
1486
1487         num_stats = 1 + MD_COUNTER_OFFSET(revalidate_lock) +
1488                     num_private_stats;
1489         stats = lprocfs_alloc_stats(num_stats, 0);
1490         if (stats == NULL)
1491                 return -ENOMEM;
1492
1493         lprocfs_init_mps_stats(num_private_stats, stats);
1494
1495         for (i = num_private_stats; i < num_stats; i++) {
1496                 if (stats->ls_cnt_header[i].lc_name == NULL) {
1497                         CERROR("Missing md_stat initializer md_op operation at offset %d. Aborting.\n",
1498                                i - num_private_stats);
1499                         LBUG();
1500                 }
1501         }
1502         rc = lprocfs_register_stats(obd->obd_proc_entry, "md_stats", stats);
1503         if (rc < 0) {
1504                 lprocfs_free_stats(&stats);
1505         } else {
1506                 obd->md_stats  = stats;
1507                 obd->md_cntr_base = num_private_stats;
1508         }
1509         return rc;
1510 }
1511 EXPORT_SYMBOL(lprocfs_alloc_md_stats);
1512
1513 void lprocfs_free_md_stats(struct obd_device *obd)
1514 {
1515         struct lprocfs_stats *stats = obd->md_stats;
1516
1517         if (stats != NULL) {
1518                 obd->md_stats = NULL;
1519                 obd->md_cntr_base = 0;
1520                 lprocfs_free_stats(&stats);
1521         }
1522 }
1523 EXPORT_SYMBOL(lprocfs_free_md_stats);
1524
1525 void lprocfs_init_ldlm_stats(struct lprocfs_stats *ldlm_stats)
1526 {
1527         lprocfs_counter_init(ldlm_stats,
1528                              LDLM_ENQUEUE - LDLM_FIRST_OPC,
1529                              0, "ldlm_enqueue", "reqs");
1530         lprocfs_counter_init(ldlm_stats,
1531                              LDLM_CONVERT - LDLM_FIRST_OPC,
1532                              0, "ldlm_convert", "reqs");
1533         lprocfs_counter_init(ldlm_stats,
1534                              LDLM_CANCEL - LDLM_FIRST_OPC,
1535                              0, "ldlm_cancel", "reqs");
1536         lprocfs_counter_init(ldlm_stats,
1537                              LDLM_BL_CALLBACK - LDLM_FIRST_OPC,
1538                              0, "ldlm_bl_callback", "reqs");
1539         lprocfs_counter_init(ldlm_stats,
1540                              LDLM_CP_CALLBACK - LDLM_FIRST_OPC,
1541                              0, "ldlm_cp_callback", "reqs");
1542         lprocfs_counter_init(ldlm_stats,
1543                              LDLM_GL_CALLBACK - LDLM_FIRST_OPC,
1544                              0, "ldlm_gl_callback", "reqs");
1545 }
1546 EXPORT_SYMBOL(lprocfs_init_ldlm_stats);
1547
1548 int lprocfs_exp_print_uuid(struct cfs_hash *hs, struct cfs_hash_bd *bd,
1549                            struct hlist_node *hnode, void *data)
1550
1551 {
1552         struct obd_export *exp = cfs_hash_object(hs, hnode);
1553         struct seq_file *m = (struct seq_file *)data;
1554
1555         if (exp->exp_nid_stats)
1556                 seq_printf(m, "%s\n", obd_uuid2str(&exp->exp_client_uuid));
1557
1558         return 0;
1559 }
1560
1561 static int
1562 lproc_exp_uuid_seq_show(struct seq_file *m, void *unused)
1563 {
1564         struct nid_stat *stats = (struct nid_stat *)m->private;
1565         struct obd_device *obd = stats->nid_obd;
1566
1567         cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
1568                               lprocfs_exp_print_uuid, m);
1569         return 0;
1570 }
1571
1572 LPROC_SEQ_FOPS_RO(lproc_exp_uuid);
1573
1574 struct exp_hash_cb_data {
1575         struct seq_file *m;
1576         bool            first;
1577 };
1578
1579 int lprocfs_exp_print_hash(struct cfs_hash *hs, struct cfs_hash_bd *bd,
1580                            struct hlist_node *hnode, void *cb_data)
1581
1582 {
1583         struct exp_hash_cb_data *data = (struct exp_hash_cb_data *)cb_data;
1584         struct obd_export       *exp = cfs_hash_object(hs, hnode);
1585
1586         if (exp->exp_lock_hash != NULL) {
1587                 if (data->first) {
1588                         cfs_hash_debug_header(data->m);
1589                         data->first = false;
1590                 }
1591                 cfs_hash_debug_str(hs, data->m);
1592         }
1593
1594         return 0;
1595 }
1596
1597 static int
1598 lproc_exp_hash_seq_show(struct seq_file *m, void *unused)
1599 {
1600         struct nid_stat *stats = (struct nid_stat *)m->private;
1601         struct obd_device *obd = stats->nid_obd;
1602         struct exp_hash_cb_data cb_data = {
1603                 .m = m,
1604                 .first = true
1605         };
1606
1607         cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
1608                               lprocfs_exp_print_hash, &cb_data);
1609         return 0;
1610 }
1611
1612 LPROC_SEQ_FOPS_RO(lproc_exp_hash);
1613
1614 int lprocfs_nid_stats_clear_read(struct seq_file *m, void *data)
1615 {
1616         seq_printf(m, "%s\n",
1617                    "Write into this file to clear all nid stats and stale nid entries");
1618         return 0;
1619 }
1620 EXPORT_SYMBOL(lprocfs_nid_stats_clear_read);
1621
1622 static int lprocfs_nid_stats_clear_write_cb(void *obj, void *data)
1623 {
1624         struct nid_stat *stat = obj;
1625
1626         CDEBUG(D_INFO, "refcnt %d\n", atomic_read(&stat->nid_exp_ref_count));
1627         if (atomic_read(&stat->nid_exp_ref_count) == 1) {
1628                 /* object has only hash references. */
1629                 spin_lock(&stat->nid_obd->obd_nid_lock);
1630                 list_move(&stat->nid_list, data);
1631                 spin_unlock(&stat->nid_obd->obd_nid_lock);
1632                 return 1;
1633         }
1634         /* we has reference to object - only clear data*/
1635         if (stat->nid_stats)
1636                 lprocfs_clear_stats(stat->nid_stats);
1637
1638         return 0;
1639 }
1640
1641 int lprocfs_nid_stats_clear_write(struct file *file, const char *buffer,
1642                                   unsigned long count, void *data)
1643 {
1644         struct obd_device *obd = (struct obd_device *)data;
1645         struct nid_stat *client_stat;
1646         LIST_HEAD(free_list);
1647
1648         cfs_hash_cond_del(obd->obd_nid_stats_hash,
1649                           lprocfs_nid_stats_clear_write_cb, &free_list);
1650
1651         while (!list_empty(&free_list)) {
1652                 client_stat = list_entry(free_list.next, struct nid_stat,
1653                                              nid_list);
1654                 list_del_init(&client_stat->nid_list);
1655                 lprocfs_free_client_stats(client_stat);
1656         }
1657
1658         return count;
1659 }
1660 EXPORT_SYMBOL(lprocfs_nid_stats_clear_write);
1661
1662 int lprocfs_exp_setup(struct obd_export *exp, lnet_nid_t *nid, int *newnid)
1663 {
1664         struct nid_stat *new_stat, *old_stat;
1665         struct obd_device *obd = NULL;
1666         struct proc_dir_entry *entry;
1667         char *buffer = NULL;
1668         int rc = 0;
1669
1670         *newnid = 0;
1671
1672         if (!exp || !exp->exp_obd || !exp->exp_obd->obd_proc_exports_entry ||
1673             !exp->exp_obd->obd_nid_stats_hash)
1674                 return -EINVAL;
1675
1676         /* not test against zero because eric say:
1677          * You may only test nid against another nid, or LNET_NID_ANY.
1678          * Anything else is nonsense.*/
1679         if (!nid || *nid == LNET_NID_ANY)
1680                 return 0;
1681
1682         obd = exp->exp_obd;
1683
1684         CDEBUG(D_CONFIG, "using hash %p\n", obd->obd_nid_stats_hash);
1685
1686         OBD_ALLOC_PTR(new_stat);
1687         if (new_stat == NULL)
1688                 return -ENOMEM;
1689
1690         new_stat->nid          = *nid;
1691         new_stat->nid_obd          = exp->exp_obd;
1692         /* we need set default refcount to 1 to balance obd_disconnect */
1693         atomic_set(&new_stat->nid_exp_ref_count, 1);
1694
1695         old_stat = cfs_hash_findadd_unique(obd->obd_nid_stats_hash,
1696                                            nid, &new_stat->nid_hash);
1697         CDEBUG(D_INFO, "Found stats %p for nid %s - ref %d\n",
1698                old_stat, libcfs_nid2str(*nid),
1699                atomic_read(&new_stat->nid_exp_ref_count));
1700
1701         /* We need to release old stats because lprocfs_exp_cleanup() hasn't
1702          * been and will never be called. */
1703         if (exp->exp_nid_stats) {
1704                 nidstat_putref(exp->exp_nid_stats);
1705                 exp->exp_nid_stats = NULL;
1706         }
1707
1708         /* Return -EALREADY here so that we know that the /proc
1709          * entry already has been created */
1710         if (old_stat != new_stat) {
1711                 exp->exp_nid_stats = old_stat;
1712                 rc = -EALREADY;
1713                 goto destroy_new;
1714         }
1715         /* not found - create */
1716         OBD_ALLOC(buffer, LNET_NIDSTR_SIZE);
1717         if (buffer == NULL) {
1718                 rc = -ENOMEM;
1719                 goto destroy_new;
1720         }
1721
1722         memcpy(buffer, libcfs_nid2str(*nid), LNET_NIDSTR_SIZE);
1723         new_stat->nid_proc = lprocfs_register(buffer,
1724                                               obd->obd_proc_exports_entry,
1725                                               NULL, NULL);
1726         OBD_FREE(buffer, LNET_NIDSTR_SIZE);
1727
1728         if (IS_ERR(new_stat->nid_proc)) {
1729                 CERROR("Error making export directory for nid %s\n",
1730                        libcfs_nid2str(*nid));
1731                 rc = PTR_ERR(new_stat->nid_proc);
1732                 new_stat->nid_proc = NULL;
1733                 goto destroy_new_ns;
1734         }
1735
1736         entry = lprocfs_add_simple(new_stat->nid_proc, "uuid",
1737                                    new_stat, &lproc_exp_uuid_fops);
1738         if (IS_ERR(entry)) {
1739                 CWARN("Error adding the NID stats file\n");
1740                 rc = PTR_ERR(entry);
1741                 goto destroy_new_ns;
1742         }
1743
1744         entry = lprocfs_add_simple(new_stat->nid_proc, "hash",
1745                                    new_stat, &lproc_exp_hash_fops);
1746         if (IS_ERR(entry)) {
1747                 CWARN("Error adding the hash file\n");
1748                 rc = PTR_ERR(entry);
1749                 goto destroy_new_ns;
1750         }
1751
1752         exp->exp_nid_stats = new_stat;
1753         *newnid = 1;
1754         /* protect competitive add to list, not need locking on destroy */
1755         spin_lock(&obd->obd_nid_lock);
1756         list_add(&new_stat->nid_list, &obd->obd_nid_stats);
1757         spin_unlock(&obd->obd_nid_lock);
1758
1759         return rc;
1760
1761 destroy_new_ns:
1762         if (new_stat->nid_proc != NULL)
1763                 lprocfs_remove(&new_stat->nid_proc);
1764         cfs_hash_del(obd->obd_nid_stats_hash, nid, &new_stat->nid_hash);
1765
1766 destroy_new:
1767         nidstat_putref(new_stat);
1768         OBD_FREE_PTR(new_stat);
1769         return rc;
1770 }
1771 EXPORT_SYMBOL(lprocfs_exp_setup);
1772
1773 int lprocfs_exp_cleanup(struct obd_export *exp)
1774 {
1775         struct nid_stat *stat = exp->exp_nid_stats;
1776
1777         if (!stat || !exp->exp_obd)
1778                 return 0;
1779
1780         nidstat_putref(exp->exp_nid_stats);
1781         exp->exp_nid_stats = NULL;
1782
1783         return 0;
1784 }
1785 EXPORT_SYMBOL(lprocfs_exp_cleanup);
1786
1787 __s64 lprocfs_read_helper(struct lprocfs_counter *lc,
1788                           struct lprocfs_counter_header *header,
1789                           enum lprocfs_stats_flags flags,
1790                           enum lprocfs_fields_flags field)
1791 {
1792         __s64 ret = 0;
1793
1794         if (lc == NULL || header == NULL)
1795                 return 0;
1796
1797         switch (field) {
1798         case LPROCFS_FIELDS_FLAGS_CONFIG:
1799                 ret = header->lc_config;
1800                 break;
1801         case LPROCFS_FIELDS_FLAGS_SUM:
1802                 ret = lc->lc_sum;
1803                 if ((flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0)
1804                         ret += lc->lc_sum_irq;
1805                 break;
1806         case LPROCFS_FIELDS_FLAGS_MIN:
1807                 ret = lc->lc_min;
1808                 break;
1809         case LPROCFS_FIELDS_FLAGS_MAX:
1810                 ret = lc->lc_max;
1811                 break;
1812         case LPROCFS_FIELDS_FLAGS_AVG:
1813                 ret = (lc->lc_max - lc->lc_min) / 2;
1814                 break;
1815         case LPROCFS_FIELDS_FLAGS_SUMSQUARE:
1816                 ret = lc->lc_sumsquare;
1817                 break;
1818         case LPROCFS_FIELDS_FLAGS_COUNT:
1819                 ret = lc->lc_count;
1820                 break;
1821         default:
1822                 break;
1823         }
1824
1825         return 0;
1826 }
1827 EXPORT_SYMBOL(lprocfs_read_helper);
1828
1829 int lprocfs_write_helper(const char __user *buffer, unsigned long count,
1830                          int *val)
1831 {
1832         return lprocfs_write_frac_helper(buffer, count, val, 1);
1833 }
1834 EXPORT_SYMBOL(lprocfs_write_helper);
1835
1836 int lprocfs_seq_read_frac_helper(struct seq_file *m, long val, int mult)
1837 {
1838         long decimal_val, frac_val;
1839
1840         decimal_val = val / mult;
1841         seq_printf(m, "%ld", decimal_val);
1842         frac_val = val % mult;
1843
1844         if (frac_val > 0) {
1845                 frac_val *= 100;
1846                 frac_val /= mult;
1847         }
1848         if (frac_val > 0) {
1849                 /* Three cases: x0, xx, 0x */
1850                 if ((frac_val % 10) != 0)
1851                         seq_printf(m, ".%ld", frac_val);
1852                 else
1853                         seq_printf(m, ".%ld", frac_val / 10);
1854         }
1855
1856         seq_printf(m, "\n");
1857         return 0;
1858 }
1859 EXPORT_SYMBOL(lprocfs_seq_read_frac_helper);
1860
1861 int lprocfs_write_u64_helper(const char __user *buffer, unsigned long count,
1862                              __u64 *val)
1863 {
1864         return lprocfs_write_frac_u64_helper(buffer, count, val, 1);
1865 }
1866 EXPORT_SYMBOL(lprocfs_write_u64_helper);
1867
1868 int lprocfs_write_frac_u64_helper(const char *buffer, unsigned long count,
1869                               __u64 *val, int mult)
1870 {
1871         char kernbuf[22], *end, *pbuf;
1872         __u64 whole, frac = 0, units;
1873         unsigned frac_d = 1;
1874         int sign = 1;
1875
1876         if (count > (sizeof(kernbuf) - 1))
1877                 return -EINVAL;
1878
1879         if (copy_from_user(kernbuf, buffer, count))
1880                 return -EFAULT;
1881
1882         kernbuf[count] = '\0';
1883         pbuf = kernbuf;
1884         if (*pbuf == '-') {
1885                 sign = -1;
1886                 pbuf++;
1887         }
1888
1889         whole = simple_strtoull(pbuf, &end, 10);
1890         if (pbuf == end)
1891                 return -EINVAL;
1892
1893         if (*end == '.') {
1894                 int i;
1895                 pbuf = end + 1;
1896
1897                 /* need to limit frac_d to a __u32 */
1898                 if (strlen(pbuf) > 10)
1899                         pbuf[10] = '\0';
1900
1901                 frac = simple_strtoull(pbuf, &end, 10);
1902                 /* count decimal places */
1903                 for (i = 0; i < (end - pbuf); i++)
1904                         frac_d *= 10;
1905         }
1906
1907         units = 1;
1908         switch (tolower(*end)) {
1909         case 'p':
1910                 units <<= 10;
1911         case 't':
1912                 units <<= 10;
1913         case 'g':
1914                 units <<= 10;
1915         case 'm':
1916                 units <<= 10;
1917         case 'k':
1918                 units <<= 10;
1919         }
1920         /* Specified units override the multiplier */
1921         if (units > 1)
1922                 mult = units;
1923
1924         frac *= mult;
1925         do_div(frac, frac_d);
1926         *val = sign * (whole * mult + frac);
1927         return 0;
1928 }
1929 EXPORT_SYMBOL(lprocfs_write_frac_u64_helper);
1930
1931 static char *lprocfs_strnstr(const char *s1, const char *s2, size_t len)
1932 {
1933         size_t l2;
1934
1935         l2 = strlen(s2);
1936         if (!l2)
1937                 return (char *)s1;
1938         while (len >= l2) {
1939                 len--;
1940                 if (!memcmp(s1, s2, l2))
1941                         return (char *)s1;
1942                 s1++;
1943         }
1944         return NULL;
1945 }
1946
1947 /**
1948  * Find the string \a name in the input \a buffer, and return a pointer to the
1949  * value immediately following \a name, reducing \a count appropriately.
1950  * If \a name is not found the original \a buffer is returned.
1951  */
1952 char *lprocfs_find_named_value(const char *buffer, const char *name,
1953                                size_t *count)
1954 {
1955         char *val;
1956         size_t buflen = *count;
1957
1958         /* there is no strnstr() in rhel5 and ubuntu kernels */
1959         val = lprocfs_strnstr(buffer, name, buflen);
1960         if (val == NULL)
1961                 return (char *)buffer;
1962
1963         val += strlen(name);                         /* skip prefix */
1964         while (val < buffer + buflen && isspace(*val)) /* skip separator */
1965                 val++;
1966
1967         *count = 0;
1968         while (val < buffer + buflen && isalnum(*val)) {
1969                 ++*count;
1970                 ++val;
1971         }
1972
1973         return val - *count;
1974 }
1975 EXPORT_SYMBOL(lprocfs_find_named_value);
1976
1977 int lprocfs_seq_create(struct proc_dir_entry *parent,
1978                        const char *name,
1979                        umode_t mode,
1980                        const struct file_operations *seq_fops,
1981                        void *data)
1982 {
1983         struct proc_dir_entry *entry;
1984
1985         /* Disallow secretly (un)writable entries. */
1986         LASSERT((seq_fops->write == NULL) == ((mode & 0222) == 0));
1987         entry = proc_create_data(name, mode, parent, seq_fops, data);
1988
1989         if (entry == NULL)
1990                 return -ENOMEM;
1991
1992         return 0;
1993 }
1994 EXPORT_SYMBOL(lprocfs_seq_create);
1995
1996 int lprocfs_obd_seq_create(struct obd_device *dev,
1997                            const char *name,
1998                            umode_t mode,
1999                            const struct file_operations *seq_fops,
2000                            void *data)
2001 {
2002         return lprocfs_seq_create(dev->obd_proc_entry, name,
2003                                   mode, seq_fops, data);
2004 }
2005 EXPORT_SYMBOL(lprocfs_obd_seq_create);
2006
2007 void lprocfs_oh_tally(struct obd_histogram *oh, unsigned int value)
2008 {
2009         if (value >= OBD_HIST_MAX)
2010                 value = OBD_HIST_MAX - 1;
2011
2012         spin_lock(&oh->oh_lock);
2013         oh->oh_buckets[value]++;
2014         spin_unlock(&oh->oh_lock);
2015 }
2016 EXPORT_SYMBOL(lprocfs_oh_tally);
2017
2018 void lprocfs_oh_tally_log2(struct obd_histogram *oh, unsigned int value)
2019 {
2020         unsigned int val;
2021
2022         for (val = 0; ((1 << val) < value) && (val <= OBD_HIST_MAX); val++)
2023                 ;
2024
2025         lprocfs_oh_tally(oh, val);
2026 }
2027 EXPORT_SYMBOL(lprocfs_oh_tally_log2);
2028
2029 unsigned long lprocfs_oh_sum(struct obd_histogram *oh)
2030 {
2031         unsigned long ret = 0;
2032         int i;
2033
2034         for (i = 0; i < OBD_HIST_MAX; i++)
2035                 ret +=  oh->oh_buckets[i];
2036         return ret;
2037 }
2038 EXPORT_SYMBOL(lprocfs_oh_sum);
2039
2040 void lprocfs_oh_clear(struct obd_histogram *oh)
2041 {
2042         spin_lock(&oh->oh_lock);
2043         memset(oh->oh_buckets, 0, sizeof(oh->oh_buckets));
2044         spin_unlock(&oh->oh_lock);
2045 }
2046 EXPORT_SYMBOL(lprocfs_oh_clear);
2047
2048 int lprocfs_obd_rd_max_pages_per_rpc(struct seq_file *m, void *data)
2049 {
2050         struct obd_device *dev = data;
2051         struct client_obd *cli = &dev->u.cli;
2052         int rc;
2053
2054         client_obd_list_lock(&cli->cl_loi_list_lock);
2055         rc = seq_printf(m, "%d\n", cli->cl_max_pages_per_rpc);
2056         client_obd_list_unlock(&cli->cl_loi_list_lock);
2057         return rc;
2058 }
2059 EXPORT_SYMBOL(lprocfs_obd_rd_max_pages_per_rpc);
2060
2061 #endif