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