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, 2015, 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 #include "../include/obd_class.h"
  44 #include "../include/lprocfs_status.h"
  45 #include "../include/lustre/lustre_idl.h"
  46 #include <linux/seq_file.h>
  47 #include <linux/ctype.h>
  48
  49 static const char * const obd_connect_names[] = {
  50         "read_only",
  51         "lov_index",
  52         "unused",
  53         "write_grant",
  54         "server_lock",
  55         "version",
  56         "request_portal",
  57         "acl",
  58         "xattr",
  59         "create_on_write",
  60         "truncate_lock",
  61         "initial_transno",
  62         "inode_bit_locks",
  63         "join_file(obsolete)",
  64         "getattr_by_fid",
  65         "no_oh_for_devices",
  66         "remote_client",
  67         "remote_client_by_force",
  68         "max_byte_per_rpc",
  69         "64bit_qdata",
  70         "mds_capability",
  71         "oss_capability",
  72         "early_lock_cancel",
  73         "som",
  74         "adaptive_timeouts",
  75         "lru_resize",
  76         "mds_mds_connection",
  77         "real_conn",
  78         "change_qunit_size",
  79         "alt_checksum_algorithm",
  80         "fid_is_enabled",
  81         "version_recovery",
  82         "pools",
  83         "grant_shrink",
  84         "skip_orphan",
  85         "large_ea",
  86         "full20",
  87         "layout_lock",
  88         "64bithash",
  89         "object_max_bytes",
  90         "imp_recov",
  91         "jobstats",
  92         "umask",
  93         "einprogress",
  94         "grant_param",
  95         "flock_owner",
  96         "lvb_type",
  97         "nanoseconds_times",
  98         "lightweight_conn",
  99         "short_io",
 100         "pingless",
 101         "flock_deadlock",
 102         "disp_stripe",
 103         "unknown",
 104         NULL
 105 };
 106
 107 int obd_connect_flags2str(char *page, int count, __u64 flags, char *sep)
 108 {
 109         __u64 mask = 1;
 110         int i, ret = 0;
 111
 112         for (i = 0; obd_connect_names[i] != NULL; i++, mask <<= 1) {
 113                 if (flags & mask)
 114                         ret += snprintf(page + ret, count - ret, "%s%s",
 115                                         ret ? sep : "", obd_connect_names[i]);
 116         }
 117         if (flags & ~(mask - 1))
 118                 ret += snprintf(page + ret, count - ret,
 119                                 "%sunknown flags %#llx",
 120                                 ret ? sep : "", flags & ~(mask - 1));
 121         return ret;
 122 }
 123 EXPORT_SYMBOL(obd_connect_flags2str);
 124
 125 int lprocfs_read_frac_helper(char *buffer, unsigned long count, long val,
 126                              int mult)
 127 {
 128         long decimal_val, frac_val;
 129         int prtn;
 130
 131         if (count < 10)
 132                 return -EINVAL;
 133
 134         decimal_val = val / mult;
 135         prtn = snprintf(buffer, count, "%ld", decimal_val);
 136         frac_val = val % mult;
 137
 138         if (prtn < (count - 4) && frac_val > 0) {
 139                 long temp_frac;
 140                 int i, temp_mult = 1, frac_bits = 0;
 141
 142                 temp_frac = frac_val * 10;
 143                 buffer[prtn++] = '.';
 144                 while (frac_bits < 2 && (temp_frac / mult) < 1) {
 145                         /* only reserved 2 bits fraction */
 146                         buffer[prtn++] = '0';
 147                         temp_frac *= 10;
 148                         frac_bits++;
 149                 }
 150                 /*
 151                  * Need to think these cases :
 152                  *      1. #echo x.00 > /proc/xxx       output result : x
 153                  *      2. #echo x.0x > /proc/xxx       output result : x.0x
 154                  *      3. #echo x.x0 > /proc/xxx       output result : x.x
 155                  *      4. #echo x.xx > /proc/xxx       output result : x.xx
 156                  *      Only reserved 2 bits fraction.
 157                  */
 158                 for (i = 0; i < (5 - prtn); i++)
 159                         temp_mult *= 10;
 160
 161                 frac_bits = min((int)count - prtn, 3 - frac_bits);
 162                 prtn += snprintf(buffer + prtn, frac_bits, "%ld",
 163                                  frac_val * temp_mult / mult);
 164
 165                 prtn--;
 166                 while (buffer[prtn] < '1' || buffer[prtn] > '9') {
 167                         prtn--;
 168                         if (buffer[prtn] == '.') {
 169                                 prtn--;
 170                                 break;
 171                         }
 172                 }
 173                 prtn++;
 174         }
 175         buffer[prtn++] = '\n';
 176         return prtn;
 177 }
 178 EXPORT_SYMBOL(lprocfs_read_frac_helper);
 179
 180 int lprocfs_write_frac_helper(const char __user *buffer, unsigned long count,
 181                               int *val, int mult)
 182 {
 183         char kernbuf[20], *end, *pbuf;
 184
 185         if (count > (sizeof(kernbuf) - 1))
 186                 return -EINVAL;
 187
 188         if (copy_from_user(kernbuf, buffer, count))
 189                 return -EFAULT;
 190
 191         kernbuf[count] = '\0';
 192         pbuf = kernbuf;
 193         if (*pbuf == '-') {
 194                 mult = -mult;
 195                 pbuf++;
 196         }
 197
 198         *val = (int)simple_strtoul(pbuf, &end, 10) * mult;
 199         if (pbuf == end)
 200                 return -EINVAL;
 201
 202         if (end != NULL && *end == '.') {
 203                 int temp_val, pow = 1;
 204                 int i;
 205
 206                 pbuf = end + 1;
 207                 if (strlen(pbuf) > 5)
 208                         pbuf[5] = '\0'; /*only allow 5bits fractional*/
 209
 210                 temp_val = (int)simple_strtoul(pbuf, &end, 10) * mult;
 211
 212                 if (pbuf < end) {
 213                         for (i = 0; i < (end - pbuf); i++)
 214                                 pow *= 10;
 215
 216                         *val += temp_val / pow;
 217                 }
 218         }
 219         return 0;
 220 }
 221 EXPORT_SYMBOL(lprocfs_write_frac_helper);
 222
 223 static int lprocfs_no_percpu_stats;
 224 module_param(lprocfs_no_percpu_stats, int, 0644);
 225 MODULE_PARM_DESC(lprocfs_no_percpu_stats, "Do not alloc percpu data for lprocfs stats");
 226
 227 #define MAX_STRING_SIZE 128
 228
 229 int lprocfs_single_release(struct inode *inode, struct file *file)
 230 {
 231         return single_release(inode, file);
 232 }
 233 EXPORT_SYMBOL(lprocfs_single_release);
 234
 235 int lprocfs_seq_release(struct inode *inode, struct file *file)
 236 {
 237         return seq_release(inode, file);
 238 }
 239 EXPORT_SYMBOL(lprocfs_seq_release);
 240
 241 /* lprocfs API calls */
 242
 243 struct dentry *ldebugfs_add_simple(struct dentry *root,
 244                                    char *name, void *data,
 245                                    struct file_operations *fops)
 246 {
 247         struct dentry *entry;
 248         umode_t mode = 0;
 249
 250         if (root == NULL || name == NULL || fops == NULL)
 251                 return ERR_PTR(-EINVAL);
 252
 253         if (fops->read)
 254                 mode = 0444;
 255         if (fops->write)
 256                 mode |= 0200;
 257         entry = debugfs_create_file(name, mode, root, data, fops);
 258         if (IS_ERR_OR_NULL(entry)) {
 259                 CERROR("LprocFS: No memory to create <debugfs> entry %s", name);
 260                 return entry ?: ERR_PTR(-ENOMEM);
 261         }
 262         return entry;
 263 }
 264 EXPORT_SYMBOL(ldebugfs_add_simple);
 265
 266 static struct file_operations lprocfs_generic_fops = { };
 267
 268 int ldebugfs_add_vars(struct dentry *parent,
 269                       struct lprocfs_vars *list,
 270                       void *data)
 271 {
 272         if (IS_ERR_OR_NULL(parent) || IS_ERR_OR_NULL(list))
 273                 return -EINVAL;
 274
 275         while (list->name != NULL) {
 276                 struct dentry *entry;
 277                 umode_t mode = 0;
 278
 279                 if (list->proc_mode != 0000) {
 280                         mode = list->proc_mode;
 281                 } else if (list->fops) {
 282                         if (list->fops->read)
 283                                 mode = 0444;
 284                         if (list->fops->write)
 285                                 mode |= 0200;
 286                 }
 287                 entry = debugfs_create_file(list->name, mode, parent,
 288                                             list->data ?: data,
 289                                             list->fops ?: &lprocfs_generic_fops
 290                                            );
 291                 if (IS_ERR_OR_NULL(entry))
 292                         return entry ? PTR_ERR(entry) : -ENOMEM;
 293                 list++;
 294         }
 295         return 0;
 296 }
 297 EXPORT_SYMBOL(ldebugfs_add_vars);
 298
 299 void ldebugfs_remove(struct dentry **entryp)
 300 {
 301         debugfs_remove_recursive(*entryp);
 302         *entryp = NULL;
 303 }
 304 EXPORT_SYMBOL(ldebugfs_remove);
 305
 306 struct dentry *ldebugfs_register(const char *name,
 307                                  struct dentry *parent,
 308                                  struct lprocfs_vars *list, void *data)
 309 {
 310         struct dentry *entry;
 311
 312         entry = debugfs_create_dir(name, parent);
 313         if (IS_ERR_OR_NULL(entry)) {
 314                 entry = entry ?: ERR_PTR(-ENOMEM);
 315                 goto out;
 316         }
 317
 318         if (!IS_ERR_OR_NULL(list)) {
 319                 int rc;
 320
 321                 rc = ldebugfs_add_vars(entry, list, data);
 322                 if (rc != 0) {
 323                         debugfs_remove(entry);
 324                         entry = ERR_PTR(rc);
 325                 }
 326         }
 327 out:
 328         return entry;
 329 }
 330 EXPORT_SYMBOL(ldebugfs_register);
 331
 332 /* Generic callbacks */
 333 int lprocfs_rd_uint(struct seq_file *m, void *data)
 334 {
 335         seq_printf(m, "%u\n", *(unsigned int *)data);
 336         return 0;
 337 }
 338 EXPORT_SYMBOL(lprocfs_rd_uint);
 339
 340 int lprocfs_wr_uint(struct file *file, const char __user *buffer,
 341                     unsigned long count, void *data)
 342 {
 343         unsigned *p = data;
 344         char dummy[MAX_STRING_SIZE + 1], *end;
 345         unsigned long tmp;
 346
 347         dummy[MAX_STRING_SIZE] = '\0';
 348         if (copy_from_user(dummy, buffer, MAX_STRING_SIZE))
 349                 return -EFAULT;
 350
 351         tmp = simple_strtoul(dummy, &end, 0);
 352         if (dummy == end)
 353                 return -EINVAL;
 354
 355         *p = (unsigned int)tmp;
 356         return count;
 357 }
 358 EXPORT_SYMBOL(lprocfs_wr_uint);
 359
 360 static ssize_t uuid_show(struct kobject *kobj, struct attribute *attr,
 361                          char *buf)
 362 {
 363         struct obd_device *obd = container_of(kobj, struct obd_device,
 364                                               obd_kobj);
 365
 366         return sprintf(buf, "%s\n", obd->obd_uuid.uuid);
 367 }
 368 LUSTRE_RO_ATTR(uuid);
 369
 370 static ssize_t blocksize_show(struct kobject *kobj, struct attribute *attr,
 371                               char *buf)
 372 {
 373         struct obd_device *obd = container_of(kobj, struct obd_device,
 374                                               obd_kobj);
 375         struct obd_statfs  osfs;
 376         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 377                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 378                             OBD_STATFS_NODELAY);
 379         if (!rc)
 380                 return sprintf(buf, "%u\n", osfs.os_bsize);
 381
 382         return rc;
 383 }
 384 LUSTRE_RO_ATTR(blocksize);
 385
 386 static ssize_t kbytestotal_show(struct kobject *kobj, struct attribute *attr,
 387                                 char *buf)
 388 {
 389         struct obd_device *obd = container_of(kobj, struct obd_device,
 390                                               obd_kobj);
 391         struct obd_statfs  osfs;
 392         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 393                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 394                             OBD_STATFS_NODELAY);
 395         if (!rc) {
 396                 __u32 blk_size = osfs.os_bsize >> 10;
 397                 __u64 result = osfs.os_blocks;
 398
 399                 while (blk_size >>= 1)
 400                         result <<= 1;
 401
 402                 return sprintf(buf, "%llu\n", result);
 403         }
 404
 405         return rc;
 406 }
 407 LUSTRE_RO_ATTR(kbytestotal);
 408
 409 static ssize_t kbytesfree_show(struct kobject *kobj, struct attribute *attr,
 410                                char *buf)
 411 {
 412         struct obd_device *obd = container_of(kobj, struct obd_device,
 413                                               obd_kobj);
 414         struct obd_statfs  osfs;
 415         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 416                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 417                             OBD_STATFS_NODELAY);
 418         if (!rc) {
 419                 __u32 blk_size = osfs.os_bsize >> 10;
 420                 __u64 result = osfs.os_bfree;
 421
 422                 while (blk_size >>= 1)
 423                         result <<= 1;
 424
 425                 return sprintf(buf, "%llu\n", result);
 426         }
 427
 428         return rc;
 429 }
 430 LUSTRE_RO_ATTR(kbytesfree);
 431
 432 static ssize_t kbytesavail_show(struct kobject *kobj, struct attribute *attr,
 433                                 char *buf)
 434 {
 435         struct obd_device *obd = container_of(kobj, struct obd_device,
 436                                               obd_kobj);
 437         struct obd_statfs  osfs;
 438         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 439                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 440                             OBD_STATFS_NODELAY);
 441         if (!rc) {
 442                 __u32 blk_size = osfs.os_bsize >> 10;
 443                 __u64 result = osfs.os_bavail;
 444
 445                 while (blk_size >>= 1)
 446                         result <<= 1;
 447
 448                 return sprintf(buf, "%llu\n", result);
 449         }
 450
 451         return rc;
 452 }
 453 LUSTRE_RO_ATTR(kbytesavail);
 454
 455 static ssize_t filestotal_show(struct kobject *kobj, struct attribute *attr,
 456                                char *buf)
 457 {
 458         struct obd_device *obd = container_of(kobj, struct obd_device,
 459                                               obd_kobj);
 460         struct obd_statfs  osfs;
 461         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 462                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 463                             OBD_STATFS_NODELAY);
 464         if (!rc)
 465                 return sprintf(buf, "%llu\n", osfs.os_files);
 466
 467         return rc;
 468 }
 469 LUSTRE_RO_ATTR(filestotal);
 470
 471 static ssize_t filesfree_show(struct kobject *kobj, struct attribute *attr,
 472                               char *buf)
 473 {
 474         struct obd_device *obd = container_of(kobj, struct obd_device,
 475                                               obd_kobj);
 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                 return sprintf(buf, "%llu\n", osfs.os_ffree);
 482
 483         return rc;
 484 }
 485 LUSTRE_RO_ATTR(filesfree);
 486
 487 int lprocfs_rd_server_uuid(struct seq_file *m, void *data)
 488 {
 489         struct obd_device *obd = data;
 490         struct obd_import *imp;
 491         char *imp_state_name = NULL;
 492         int rc;
 493
 494         LASSERT(obd != NULL);
 495         rc = lprocfs_climp_check(obd);
 496         if (rc)
 497                 return rc;
 498
 499         imp = obd->u.cli.cl_import;
 500         imp_state_name = ptlrpc_import_state_name(imp->imp_state);
 501         seq_printf(m, "%s\t%s%s\n",
 502                    obd2cli_tgt(obd), imp_state_name,
 503                    imp->imp_deactive ? "\tDEACTIVATED" : "");
 504
 505         up_read(&obd->u.cli.cl_sem);
 506
 507         return 0;
 508 }
 509 EXPORT_SYMBOL(lprocfs_rd_server_uuid);
 510
 511 int lprocfs_rd_conn_uuid(struct seq_file *m, void *data)
 512 {
 513         struct obd_device *obd = data;
 514         struct ptlrpc_connection *conn;
 515         int rc;
 516
 517         LASSERT(obd != NULL);
 518
 519         rc = lprocfs_climp_check(obd);
 520         if (rc)
 521                 return rc;
 522
 523         conn = obd->u.cli.cl_import->imp_connection;
 524         if (conn && obd->u.cli.cl_import)
 525                 seq_printf(m, "%s\n", conn->c_remote_uuid.uuid);
 526         else
 527                 seq_puts(m, "<none>\n");
 528
 529         up_read(&obd->u.cli.cl_sem);
 530
 531         return 0;
 532 }
 533 EXPORT_SYMBOL(lprocfs_rd_conn_uuid);
 534
 535 /** add up per-cpu counters */
 536 void lprocfs_stats_collect(struct lprocfs_stats *stats, int idx,
 537                            struct lprocfs_counter *cnt)
 538 {
 539         unsigned int                    num_entry;
 540         struct lprocfs_counter          *percpu_cntr;
 541         int                             i;
 542         unsigned long                   flags = 0;
 543
 544         memset(cnt, 0, sizeof(*cnt));
 545
 546         if (stats == NULL) {
 547                 /* set count to 1 to avoid divide-by-zero errs in callers */
 548                 cnt->lc_count = 1;
 549                 return;
 550         }
 551
 552         cnt->lc_min = LC_MIN_INIT;
 553
 554         num_entry = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
 555
 556         for (i = 0; i < num_entry; i++) {
 557                 if (stats->ls_percpu[i] == NULL)
 558                         continue;
 559                 percpu_cntr = lprocfs_stats_counter_get(stats, i, idx);
 560
 561                 cnt->lc_count += percpu_cntr->lc_count;
 562                 cnt->lc_sum += percpu_cntr->lc_sum;
 563                 if (percpu_cntr->lc_min < cnt->lc_min)
 564                         cnt->lc_min = percpu_cntr->lc_min;
 565                 if (percpu_cntr->lc_max > cnt->lc_max)
 566                         cnt->lc_max = percpu_cntr->lc_max;
 567                 cnt->lc_sumsquare += percpu_cntr->lc_sumsquare;
 568         }
 569
 570         lprocfs_stats_unlock(stats, LPROCFS_GET_NUM_CPU, &flags);
 571 }
 572 EXPORT_SYMBOL(lprocfs_stats_collect);
 573
 574 /**
 575  * Append a space separated list of current set flags to str.
 576  */
 577 #define flag2str(flag, first)                                           \
 578         do {                                                            \
 579                 if (imp->imp_##flag)                                    \
 580                      seq_printf(m, "%s" #flag, first ? "" : ", ");      \
 581         } while (0)
 582 static int obd_import_flags2str(struct obd_import *imp, struct seq_file *m)
 583 {
 584         bool first = true;
 585
 586         if (imp->imp_obd->obd_no_recov) {
 587                 seq_printf(m, "no_recov");
 588                 first = false;
 589         }
 590
 591         flag2str(invalid, first);
 592         first = false;
 593         flag2str(deactive, first);
 594         flag2str(replayable, first);
 595         flag2str(pingable, first);
 596         return 0;
 597 }
 598
 599 #undef flags2str
 600
 601 static void obd_connect_seq_flags2str(struct seq_file *m, __u64 flags, char *sep)
 602 {
 603         __u64 mask = 1;
 604         int i;
 605         bool first = true;
 606
 607         for (i = 0; obd_connect_names[i] != NULL; i++, mask <<= 1) {
 608                 if (flags & mask) {
 609                         seq_printf(m, "%s%s",
 610                                         first ? sep : "", obd_connect_names[i]);
 611                         first = false;
 612                 }
 613         }
 614         if (flags & ~(mask - 1))
 615                 seq_printf(m, "%sunknown flags %#llx",
 616                                 first ? sep : "", flags & ~(mask - 1));
 617 }
 618
 619 int lprocfs_rd_import(struct seq_file *m, void *data)
 620 {
 621         char                            nidstr[LNET_NIDSTR_SIZE];
 622         struct lprocfs_counter          ret;
 623         struct lprocfs_counter_header   *header;
 624         struct obd_device               *obd    = data;
 625         struct obd_import               *imp;
 626         struct obd_import_conn          *conn;
 627         int                             j;
 628         int                             k;
 629         int                             rw      = 0;
 630         int                             rc;
 631
 632         LASSERT(obd != NULL);
 633         rc = lprocfs_climp_check(obd);
 634         if (rc)
 635                 return rc;
 636
 637         imp = obd->u.cli.cl_import;
 638
 639         seq_printf(m,
 640                      "import:\n"
 641                      "    name: %s\n"
 642                      "    target: %s\n"
 643                      "    state: %s\n"
 644                      "    instance: %u\n"
 645                      "    connect_flags: [",
 646                      obd->obd_name,
 647                      obd2cli_tgt(obd),
 648                      ptlrpc_import_state_name(imp->imp_state),
 649                      imp->imp_connect_data.ocd_instance);
 650         obd_connect_seq_flags2str(m, imp->imp_connect_data.ocd_connect_flags, ", ");
 651         seq_printf(m,
 652                       "]\n"
 653                       "    import_flags: [");
 654         obd_import_flags2str(imp, m);
 655
 656         seq_printf(m,
 657                       "]\n"
 658                       "    connection:\n"
 659                       "       failover_nids: [");
 660         spin_lock(&imp->imp_lock);
 661         j = 0;
 662         list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
 663                 libcfs_nid2str_r(conn->oic_conn->c_peer.nid,
 664                                  nidstr, sizeof(nidstr));
 665                 seq_printf(m, "%s%s", j ? ", " : "", nidstr);
 666                 j++;
 667         }
 668         if (imp->imp_connection != NULL)
 669                 libcfs_nid2str_r(imp->imp_connection->c_peer.nid,
 670                                  nidstr, sizeof(nidstr));
 671         else
 672                 strncpy(nidstr, "<none>", sizeof(nidstr));
 673         seq_printf(m,
 674                       "]\n"
 675                       "       current_connection: %s\n"
 676                       "       connection_attempts: %u\n"
 677                       "       generation: %u\n"
 678                       "       in-progress_invalidations: %u\n",
 679                       nidstr,
 680                       imp->imp_conn_cnt,
 681                       imp->imp_generation,
 682                       atomic_read(&imp->imp_inval_count));
 683         spin_unlock(&imp->imp_lock);
 684
 685         if (obd->obd_svc_stats == NULL)
 686                 goto out_climp;
 687
 688         header = &obd->obd_svc_stats->ls_cnt_header[PTLRPC_REQWAIT_CNTR];
 689         lprocfs_stats_collect(obd->obd_svc_stats, PTLRPC_REQWAIT_CNTR, &ret);
 690         if (ret.lc_count != 0) {
 691                 /* first argument to do_div MUST be __u64 */
 692                 __u64 sum = ret.lc_sum;
 693
 694                 do_div(sum, ret.lc_count);
 695                 ret.lc_sum = sum;
 696         } else
 697                 ret.lc_sum = 0;
 698         seq_printf(m,
 699                       "    rpcs:\n"
 700                       "       inflight: %u\n"
 701                       "       unregistering: %u\n"
 702                       "       timeouts: %u\n"
 703                       "       avg_waittime: %llu %s\n",
 704                       atomic_read(&imp->imp_inflight),
 705                       atomic_read(&imp->imp_unregistering),
 706                       atomic_read(&imp->imp_timeouts),
 707                       ret.lc_sum, header->lc_units);
 708
 709         k = 0;
 710         for (j = 0; j < IMP_AT_MAX_PORTALS; j++) {
 711                 if (imp->imp_at.iat_portal[j] == 0)
 712                         break;
 713                 k = max_t(unsigned int, k,
 714                           at_get(&imp->imp_at.iat_service_estimate[j]));
 715         }
 716         seq_printf(m,
 717                       "    service_estimates:\n"
 718                       "       services: %u sec\n"
 719                       "       network: %u sec\n",
 720                       k,
 721                       at_get(&imp->imp_at.iat_net_latency));
 722
 723         seq_printf(m,
 724                       "    transactions:\n"
 725                       "       last_replay: %llu\n"
 726                       "       peer_committed: %llu\n"
 727                       "       last_checked: %llu\n",
 728                       imp->imp_last_replay_transno,
 729                       imp->imp_peer_committed_transno,
 730                       imp->imp_last_transno_checked);
 731
 732         /* avg data rates */
 733         for (rw = 0; rw <= 1; rw++) {
 734                 lprocfs_stats_collect(obd->obd_svc_stats,
 735                                       PTLRPC_LAST_CNTR + BRW_READ_BYTES + rw,
 736                                       &ret);
 737                 if (ret.lc_sum > 0 && ret.lc_count > 0) {
 738                         /* first argument to do_div MUST be __u64 */
 739                         __u64 sum = ret.lc_sum;
 740
 741                         do_div(sum, ret.lc_count);
 742                         ret.lc_sum = sum;
 743                         seq_printf(m,
 744                                       "    %s_data_averages:\n"
 745                                       "       bytes_per_rpc: %llu\n",
 746                                       rw ? "write" : "read",
 747                                       ret.lc_sum);
 748                 }
 749                 k = (int)ret.lc_sum;
 750                 j = opcode_offset(OST_READ + rw) + EXTRA_MAX_OPCODES;
 751                 header = &obd->obd_svc_stats->ls_cnt_header[j];
 752                 lprocfs_stats_collect(obd->obd_svc_stats, j, &ret);
 753                 if (ret.lc_sum > 0 && ret.lc_count != 0) {
 754                         /* first argument to do_div MUST be __u64 */
 755                         __u64 sum = ret.lc_sum;
 756
 757                         do_div(sum, ret.lc_count);
 758                         ret.lc_sum = sum;
 759                         seq_printf(m,
 760                                       "       %s_per_rpc: %llu\n",
 761                                       header->lc_units, ret.lc_sum);
 762                         j = (int)ret.lc_sum;
 763                         if (j > 0)
 764                                 seq_printf(m,
 765                                               "       MB_per_sec: %u.%.02u\n",
 766                                               k / j, (100 * k / j) % 100);
 767                 }
 768         }
 769
 770 out_climp:
 771         up_read(&obd->u.cli.cl_sem);
 772         return 0;
 773 }
 774 EXPORT_SYMBOL(lprocfs_rd_import);
 775
 776 int lprocfs_rd_state(struct seq_file *m, void *data)
 777 {
 778         struct obd_device *obd = data;
 779         struct obd_import *imp;
 780         int j, k, rc;
 781
 782         LASSERT(obd != NULL);
 783         rc = lprocfs_climp_check(obd);
 784         if (rc)
 785                 return rc;
 786
 787         imp = obd->u.cli.cl_import;
 788
 789         seq_printf(m, "current_state: %s\n",
 790                      ptlrpc_import_state_name(imp->imp_state));
 791         seq_printf(m, "state_history:\n");
 792         k = imp->imp_state_hist_idx;
 793         for (j = 0; j < IMP_STATE_HIST_LEN; j++) {
 794                 struct import_state_hist *ish =
 795                         &imp->imp_state_hist[(k + j) % IMP_STATE_HIST_LEN];
 796                 if (ish->ish_state == 0)
 797                         continue;
 798                 seq_printf(m, " - [%lld, %s]\n", (s64)ish->ish_time,
 799                            ptlrpc_import_state_name(ish->ish_state));
 800         }
 801
 802         up_read(&obd->u.cli.cl_sem);
 803         return 0;
 804 }
 805 EXPORT_SYMBOL(lprocfs_rd_state);
 806
 807 int lprocfs_at_hist_helper(struct seq_file *m, struct adaptive_timeout *at)
 808 {
 809         int i;
 810
 811         for (i = 0; i < AT_BINS; i++)
 812                 seq_printf(m, "%3u ", at->at_hist[i]);
 813         seq_printf(m, "\n");
 814         return 0;
 815 }
 816 EXPORT_SYMBOL(lprocfs_at_hist_helper);
 817
 818 /* See also ptlrpc_lprocfs_rd_timeouts */
 819 int lprocfs_rd_timeouts(struct seq_file *m, void *data)
 820 {
 821         struct obd_device *obd = data;
 822         struct obd_import *imp;
 823         unsigned int cur, worst;
 824         time64_t now, worstt;
 825         struct dhms ts;
 826         int i, rc;
 827
 828         LASSERT(obd != NULL);
 829         rc = lprocfs_climp_check(obd);
 830         if (rc)
 831                 return rc;
 832
 833         imp = obd->u.cli.cl_import;
 834
 835         now = ktime_get_real_seconds();
 836
 837         /* Some network health info for kicks */
 838         s2dhms(&ts, now - imp->imp_last_reply_time);
 839         seq_printf(m, "%-10s : %lld, " DHMS_FMT " ago\n",
 840                    "last reply", (s64)imp->imp_last_reply_time, DHMS_VARS(&ts));
 841
 842         cur = at_get(&imp->imp_at.iat_net_latency);
 843         worst = imp->imp_at.iat_net_latency.at_worst_ever;
 844         worstt = imp->imp_at.iat_net_latency.at_worst_time;
 845         s2dhms(&ts, now - worstt);
 846         seq_printf(m, "%-10s : cur %3u  worst %3u (at %lld, " DHMS_FMT " ago) ",
 847                    "network", cur, worst, (s64)worstt, DHMS_VARS(&ts));
 848         lprocfs_at_hist_helper(m, &imp->imp_at.iat_net_latency);
 849
 850         for (i = 0; i < IMP_AT_MAX_PORTALS; i++) {
 851                 if (imp->imp_at.iat_portal[i] == 0)
 852                         break;
 853                 cur = at_get(&imp->imp_at.iat_service_estimate[i]);
 854                 worst = imp->imp_at.iat_service_estimate[i].at_worst_ever;
 855                 worstt = imp->imp_at.iat_service_estimate[i].at_worst_time;
 856                 s2dhms(&ts, now - worstt);
 857                 seq_printf(m, "portal %-2d  : cur %3u  worst %3u (at %lld, "
 858                            DHMS_FMT " ago) ", imp->imp_at.iat_portal[i],
 859                            cur, worst, (s64)worstt, DHMS_VARS(&ts));
 860                 lprocfs_at_hist_helper(m, &imp->imp_at.iat_service_estimate[i]);
 861         }
 862
 863         up_read(&obd->u.cli.cl_sem);
 864         return 0;
 865 }
 866 EXPORT_SYMBOL(lprocfs_rd_timeouts);
 867
 868 int lprocfs_rd_connect_flags(struct seq_file *m, void *data)
 869 {
 870         struct obd_device *obd = data;
 871         __u64 flags;
 872         int rc;
 873
 874         rc = lprocfs_climp_check(obd);
 875         if (rc)
 876                 return rc;
 877
 878         flags = obd->u.cli.cl_import->imp_connect_data.ocd_connect_flags;
 879         seq_printf(m, "flags=%#llx\n", flags);
 880         obd_connect_seq_flags2str(m, flags, "\n");
 881         seq_printf(m, "\n");
 882         up_read(&obd->u.cli.cl_sem);
 883         return 0;
 884 }
 885 EXPORT_SYMBOL(lprocfs_rd_connect_flags);
 886
 887 static struct attribute *obd_def_attrs[] = {
 888         &lustre_attr_blocksize.attr,
 889         &lustre_attr_kbytestotal.attr,
 890         &lustre_attr_kbytesfree.attr,
 891         &lustre_attr_kbytesavail.attr,
 892         &lustre_attr_filestotal.attr,
 893         &lustre_attr_filesfree.attr,
 894         &lustre_attr_uuid.attr,
 895         NULL,
 896 };
 897
 898 static void obd_sysfs_release(struct kobject *kobj)
 899 {
 900         struct obd_device *obd = container_of(kobj, struct obd_device,
 901                                               obd_kobj);
 902
 903         complete(&obd->obd_kobj_unregister);
 904 }
 905
 906 static struct kobj_type obd_ktype = {
 907         .default_attrs  = obd_def_attrs,
 908         .sysfs_ops      = &lustre_sysfs_ops,
 909         .release        = obd_sysfs_release,
 910 };
 911
 912 int lprocfs_obd_setup(struct obd_device *obd, struct lprocfs_vars *list,
 913                       struct attribute_group *attrs)
 914 {
 915         int rc = 0;
 916
 917         init_completion(&obd->obd_kobj_unregister);
 918         rc = kobject_init_and_add(&obd->obd_kobj, &obd_ktype,
 919                                   obd->obd_type->typ_kobj,
 920                                   "%s", obd->obd_name);
 921         if (rc)
 922                 return rc;
 923
 924         if (attrs) {
 925                 rc = sysfs_create_group(&obd->obd_kobj, attrs);
 926                 if (rc) {
 927                         kobject_put(&obd->obd_kobj);
 928                         return rc;
 929                 }
 930         }
 931
 932         obd->obd_debugfs_entry = ldebugfs_register(obd->obd_name,
 933                                                    obd->obd_type->typ_debugfs_entry,
 934                                                    list, obd);
 935         if (IS_ERR_OR_NULL(obd->obd_debugfs_entry)) {
 936                 rc = obd->obd_debugfs_entry ? PTR_ERR(obd->obd_debugfs_entry)
 937                                             : -ENOMEM;
 938                 CERROR("error %d setting up lprocfs for %s\n",
 939                        rc, obd->obd_name);
 940                 obd->obd_debugfs_entry = NULL;
 941         }
 942
 943         return rc;
 944 }
 945 EXPORT_SYMBOL(lprocfs_obd_setup);
 946
 947 int lprocfs_obd_cleanup(struct obd_device *obd)
 948 {
 949         if (!obd)
 950                 return -EINVAL;
 951
 952         if (!IS_ERR_OR_NULL(obd->obd_debugfs_entry))
 953                 ldebugfs_remove(&obd->obd_debugfs_entry);
 954
 955         kobject_put(&obd->obd_kobj);
 956         wait_for_completion(&obd->obd_kobj_unregister);
 957
 958         return 0;
 959 }
 960 EXPORT_SYMBOL(lprocfs_obd_cleanup);
 961
 962 int lprocfs_stats_alloc_one(struct lprocfs_stats *stats, unsigned int cpuid)
 963 {
 964         struct lprocfs_counter  *cntr;
 965         unsigned int            percpusize;
 966         int                     rc = -ENOMEM;
 967         unsigned long           flags = 0;
 968         int                     i;
 969
 970         LASSERT(stats->ls_percpu[cpuid] == NULL);
 971         LASSERT((stats->ls_flags & LPROCFS_STATS_FLAG_NOPERCPU) == 0);
 972
 973         percpusize = lprocfs_stats_counter_size(stats);
 974         LIBCFS_ALLOC_ATOMIC(stats->ls_percpu[cpuid], percpusize);
 975         if (stats->ls_percpu[cpuid] != NULL) {
 976                 rc = 0;
 977                 if (unlikely(stats->ls_biggest_alloc_num <= cpuid)) {
 978                         if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE)
 979                                 spin_lock_irqsave(&stats->ls_lock, flags);
 980                         else
 981                                 spin_lock(&stats->ls_lock);
 982                         if (stats->ls_biggest_alloc_num <= cpuid)
 983                                 stats->ls_biggest_alloc_num = cpuid + 1;
 984                         if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE)
 985                                 spin_unlock_irqrestore(&stats->ls_lock, flags);
 986                         else
 987                                 spin_unlock(&stats->ls_lock);
 988                 }
 989                 /* initialize the ls_percpu[cpuid] non-zero counter */
 990                 for (i = 0; i < stats->ls_num; ++i) {
 991                         cntr = lprocfs_stats_counter_get(stats, cpuid, i);
 992                         cntr->lc_min = LC_MIN_INIT;
 993                 }
 994         }
 995         return rc;
 996 }
 997 EXPORT_SYMBOL(lprocfs_stats_alloc_one);
 998
 999 struct lprocfs_stats *lprocfs_alloc_stats(unsigned int num,
1000                                           enum lprocfs_stats_flags flags)
1001 {
1002         struct lprocfs_stats    *stats;
1003         unsigned int            num_entry;
1004         unsigned int            percpusize = 0;
1005         int                     i;
1006
1007         if (num == 0)
1008                 return NULL;
1009
1010         if (lprocfs_no_percpu_stats != 0)
1011                 flags |= LPROCFS_STATS_FLAG_NOPERCPU;
1012
1013         if (flags & LPROCFS_STATS_FLAG_NOPERCPU)
1014                 num_entry = 1;
1015         else
1016                 num_entry = num_possible_cpus();
1017
1018         /* alloc percpu pointers for all possible cpu slots */
1019         LIBCFS_ALLOC(stats, offsetof(typeof(*stats), ls_percpu[num_entry]));
1020         if (stats == NULL)
1021                 return NULL;
1022
1023         stats->ls_num = num;
1024         stats->ls_flags = flags;
1025         spin_lock_init(&stats->ls_lock);
1026
1027         /* alloc num of counter headers */
1028         LIBCFS_ALLOC(stats->ls_cnt_header,
1029                      stats->ls_num * sizeof(struct lprocfs_counter_header));
1030         if (stats->ls_cnt_header == NULL)
1031                 goto fail;
1032
1033         if ((flags & LPROCFS_STATS_FLAG_NOPERCPU) != 0) {
1034                 /* contains only one set counters */
1035                 percpusize = lprocfs_stats_counter_size(stats);
1036                 LIBCFS_ALLOC_ATOMIC(stats->ls_percpu[0], percpusize);
1037                 if (stats->ls_percpu[0] == NULL)
1038                         goto fail;
1039                 stats->ls_biggest_alloc_num = 1;
1040         } else if ((flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0) {
1041                 /* alloc all percpu data */
1042                 for (i = 0; i < num_entry; ++i)
1043                         if (lprocfs_stats_alloc_one(stats, i) < 0)
1044                                 goto fail;
1045         }
1046
1047         return stats;
1048
1049 fail:
1050         lprocfs_free_stats(&stats);
1051         return NULL;
1052 }
1053 EXPORT_SYMBOL(lprocfs_alloc_stats);
1054
1055 void lprocfs_free_stats(struct lprocfs_stats **statsh)
1056 {
1057         struct lprocfs_stats *stats = *statsh;
1058         unsigned int num_entry;
1059         unsigned int percpusize;
1060         unsigned int i;
1061
1062         if (stats == NULL || stats->ls_num == 0)
1063                 return;
1064         *statsh = NULL;
1065
1066         if (stats->ls_flags & LPROCFS_STATS_FLAG_NOPERCPU)
1067                 num_entry = 1;
1068         else
1069                 num_entry = num_possible_cpus();
1070
1071         percpusize = lprocfs_stats_counter_size(stats);
1072         for (i = 0; i < num_entry; i++)
1073                 if (stats->ls_percpu[i] != NULL)
1074                         LIBCFS_FREE(stats->ls_percpu[i], percpusize);
1075         if (stats->ls_cnt_header != NULL)
1076                 LIBCFS_FREE(stats->ls_cnt_header, stats->ls_num *
1077                                         sizeof(struct lprocfs_counter_header));
1078         LIBCFS_FREE(stats, offsetof(typeof(*stats), ls_percpu[num_entry]));
1079 }
1080 EXPORT_SYMBOL(lprocfs_free_stats);
1081
1082 void lprocfs_clear_stats(struct lprocfs_stats *stats)
1083 {
1084         struct lprocfs_counter          *percpu_cntr;
1085         int                             i;
1086         int                             j;
1087         unsigned int                    num_entry;
1088         unsigned long                   flags = 0;
1089
1090         num_entry = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
1091
1092         for (i = 0; i < num_entry; i++) {
1093                 if (stats->ls_percpu[i] == NULL)
1094                         continue;
1095                 for (j = 0; j < stats->ls_num; j++) {
1096                         percpu_cntr = lprocfs_stats_counter_get(stats, i, j);
1097                         percpu_cntr->lc_count           = 0;
1098                         percpu_cntr->lc_min             = LC_MIN_INIT;
1099                         percpu_cntr->lc_max             = 0;
1100                         percpu_cntr->lc_sumsquare       = 0;
1101                         percpu_cntr->lc_sum             = 0;
1102                         if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE)
1103                                 percpu_cntr->lc_sum_irq = 0;
1104                 }
1105         }
1106
1107         lprocfs_stats_unlock(stats, LPROCFS_GET_NUM_CPU, &flags);
1108 }
1109 EXPORT_SYMBOL(lprocfs_clear_stats);
1110
1111 static ssize_t lprocfs_stats_seq_write(struct file *file,
1112                                        const char __user *buf,
1113                                        size_t len, loff_t *off)
1114 {
1115         struct seq_file *seq = file->private_data;
1116         struct lprocfs_stats *stats = seq->private;
1117
1118         lprocfs_clear_stats(stats);
1119
1120         return len;
1121 }
1122
1123 static void *lprocfs_stats_seq_start(struct seq_file *p, loff_t *pos)
1124 {
1125         struct lprocfs_stats *stats = p->private;
1126
1127         return (*pos < stats->ls_num) ? pos : NULL;
1128 }
1129
1130 static void lprocfs_stats_seq_stop(struct seq_file *p, void *v)
1131 {
1132 }
1133
1134 static void *lprocfs_stats_seq_next(struct seq_file *p, void *v, loff_t *pos)
1135 {
1136         (*pos)++;
1137         return lprocfs_stats_seq_start(p, pos);
1138 }
1139
1140 /* seq file export of one lprocfs counter */
1141 static int lprocfs_stats_seq_show(struct seq_file *p, void *v)
1142 {
1143         struct lprocfs_stats            *stats  = p->private;
1144         struct lprocfs_counter_header   *hdr;
1145         struct lprocfs_counter           ctr;
1146         int                              idx    = *(loff_t *)v;
1147
1148         if (idx == 0) {
1149                 struct timespec64 now;
1150
1151                 ktime_get_real_ts64(&now);
1152                 seq_printf(p, "%-25s %llu.%9lu secs.usecs\n",
1153                            "snapshot_time",
1154                            (s64)now.tv_sec, (unsigned long)now.tv_nsec);
1155         }
1156
1157         hdr = &stats->ls_cnt_header[idx];
1158         lprocfs_stats_collect(stats, idx, &ctr);
1159
1160         if (ctr.lc_count != 0) {
1161                 seq_printf(p, "%-25s %lld samples [%s]",
1162                            hdr->lc_name, ctr.lc_count, hdr->lc_units);
1163
1164                 if ((hdr->lc_config & LPROCFS_CNTR_AVGMINMAX) &&
1165                     (ctr.lc_count > 0)) {
1166                         seq_printf(p, " %lld %lld %lld",
1167                                    ctr.lc_min, ctr.lc_max, ctr.lc_sum);
1168                         if (hdr->lc_config & LPROCFS_CNTR_STDDEV)
1169                                 seq_printf(p, " %lld", ctr.lc_sumsquare);
1170                 }
1171                 seq_putc(p, '\n');
1172         }
1173
1174         return 0;
1175 }
1176
1177 static const struct seq_operations lprocfs_stats_seq_sops = {
1178         .start  = lprocfs_stats_seq_start,
1179         .stop   = lprocfs_stats_seq_stop,
1180         .next   = lprocfs_stats_seq_next,
1181         .show   = lprocfs_stats_seq_show,
1182 };
1183
1184 static int lprocfs_stats_seq_open(struct inode *inode, struct file *file)
1185 {
1186         struct seq_file *seq;
1187         int rc;
1188
1189         rc = seq_open(file, &lprocfs_stats_seq_sops);
1190         if (rc)
1191                 return rc;
1192
1193         seq = file->private_data;
1194         seq->private = inode->i_private;
1195
1196         return 0;
1197 }
1198
1199 struct file_operations lprocfs_stats_seq_fops = {
1200         .owner   = THIS_MODULE,
1201         .open    = lprocfs_stats_seq_open,
1202         .read    = seq_read,
1203         .write   = lprocfs_stats_seq_write,
1204         .llseek  = seq_lseek,
1205         .release = lprocfs_seq_release,
1206 };
1207
1208 int ldebugfs_register_stats(struct dentry *parent, const char *name,
1209                            struct lprocfs_stats *stats)
1210 {
1211         struct dentry *entry;
1212
1213         LASSERT(!IS_ERR_OR_NULL(parent));
1214
1215         entry = debugfs_create_file(name, 0644, parent, stats,
1216                                     &lprocfs_stats_seq_fops);
1217         if (IS_ERR_OR_NULL(entry))
1218                 return entry ? PTR_ERR(entry) : -ENOMEM;
1219
1220         return 0;
1221 }
1222 EXPORT_SYMBOL(ldebugfs_register_stats);
1223
1224 void lprocfs_counter_init(struct lprocfs_stats *stats, int index,
1225                           unsigned conf, const char *name, const char *units)
1226 {
1227         struct lprocfs_counter_header   *header;
1228         struct lprocfs_counter          *percpu_cntr;
1229         unsigned long                   flags = 0;
1230         unsigned int                    i;
1231         unsigned int                    num_cpu;
1232
1233         LASSERT(stats != NULL);
1234
1235         header = &stats->ls_cnt_header[index];
1236         LASSERTF(header != NULL, "Failed to allocate stats header:[%d]%s/%s\n",
1237                  index, name, units);
1238
1239         header->lc_config = conf;
1240         header->lc_name   = name;
1241         header->lc_units  = units;
1242
1243         num_cpu = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
1244         for (i = 0; i < num_cpu; ++i) {
1245                 if (stats->ls_percpu[i] == NULL)
1246                         continue;
1247                 percpu_cntr = lprocfs_stats_counter_get(stats, i, index);
1248                 percpu_cntr->lc_count           = 0;
1249                 percpu_cntr->lc_min             = LC_MIN_INIT;
1250                 percpu_cntr->lc_max             = 0;
1251                 percpu_cntr->lc_sumsquare       = 0;
1252                 percpu_cntr->lc_sum             = 0;
1253                 if ((stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0)
1254                         percpu_cntr->lc_sum_irq = 0;
1255         }
1256         lprocfs_stats_unlock(stats, LPROCFS_GET_NUM_CPU, &flags);
1257 }
1258 EXPORT_SYMBOL(lprocfs_counter_init);
1259
1260 int lprocfs_exp_cleanup(struct obd_export *exp)
1261 {
1262         return 0;
1263 }
1264 EXPORT_SYMBOL(lprocfs_exp_cleanup);
1265
1266 __s64 lprocfs_read_helper(struct lprocfs_counter *lc,
1267                           struct lprocfs_counter_header *header,
1268                           enum lprocfs_stats_flags flags,
1269                           enum lprocfs_fields_flags field)
1270 {
1271         __s64 ret = 0;
1272
1273         if (lc == NULL || header == NULL)
1274                 return 0;
1275
1276         switch (field) {
1277         case LPROCFS_FIELDS_FLAGS_CONFIG:
1278                 ret = header->lc_config;
1279                 break;
1280         case LPROCFS_FIELDS_FLAGS_SUM:
1281                 ret = lc->lc_sum;
1282                 if ((flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0)
1283                         ret += lc->lc_sum_irq;
1284                 break;
1285         case LPROCFS_FIELDS_FLAGS_MIN:
1286                 ret = lc->lc_min;
1287                 break;
1288         case LPROCFS_FIELDS_FLAGS_MAX:
1289                 ret = lc->lc_max;
1290                 break;
1291         case LPROCFS_FIELDS_FLAGS_AVG:
1292                 ret = (lc->lc_max - lc->lc_min) / 2;
1293                 break;
1294         case LPROCFS_FIELDS_FLAGS_SUMSQUARE:
1295                 ret = lc->lc_sumsquare;
1296                 break;
1297         case LPROCFS_FIELDS_FLAGS_COUNT:
1298                 ret = lc->lc_count;
1299                 break;
1300         default:
1301                 break;
1302         }
1303
1304         return 0;
1305 }
1306 EXPORT_SYMBOL(lprocfs_read_helper);
1307
1308 int lprocfs_write_helper(const char __user *buffer, unsigned long count,
1309                          int *val)
1310 {
1311         return lprocfs_write_frac_helper(buffer, count, val, 1);
1312 }
1313 EXPORT_SYMBOL(lprocfs_write_helper);
1314
1315 int lprocfs_write_u64_helper(const char __user *buffer, unsigned long count,
1316                              __u64 *val)
1317 {
1318         return lprocfs_write_frac_u64_helper(buffer, count, val, 1);
1319 }
1320 EXPORT_SYMBOL(lprocfs_write_u64_helper);
1321
1322 int lprocfs_write_frac_u64_helper(const char *buffer, unsigned long count,
1323                               __u64 *val, int mult)
1324 {
1325         char kernbuf[22], *end, *pbuf;
1326         __u64 whole, frac = 0, units;
1327         unsigned frac_d = 1;
1328         int sign = 1;
1329
1330         if (count > (sizeof(kernbuf) - 1))
1331                 return -EINVAL;
1332
1333         if (copy_from_user(kernbuf, buffer, count))
1334                 return -EFAULT;
1335
1336         kernbuf[count] = '\0';
1337         pbuf = kernbuf;
1338         if (*pbuf == '-') {
1339                 sign = -1;
1340                 pbuf++;
1341         }
1342
1343         whole = simple_strtoull(pbuf, &end, 10);
1344         if (pbuf == end)
1345                 return -EINVAL;
1346
1347         if (*end == '.') {
1348                 int i;
1349
1350                 pbuf = end + 1;
1351
1352                 /* need to limit frac_d to a __u32 */
1353                 if (strlen(pbuf) > 10)
1354                         pbuf[10] = '\0';
1355
1356                 frac = simple_strtoull(pbuf, &end, 10);
1357                 /* count decimal places */
1358                 for (i = 0; i < (end - pbuf); i++)
1359                         frac_d *= 10;
1360         }
1361
1362         units = 1;
1363         switch (tolower(*end)) {
1364         case 'p':
1365                 units <<= 10;
1366         case 't':
1367                 units <<= 10;
1368         case 'g':
1369                 units <<= 10;
1370         case 'm':
1371                 units <<= 10;
1372         case 'k':
1373                 units <<= 10;
1374         }
1375         /* Specified units override the multiplier */
1376         if (units > 1)
1377                 mult = units;
1378
1379         frac *= mult;
1380         do_div(frac, frac_d);
1381         *val = sign * (whole * mult + frac);
1382         return 0;
1383 }
1384 EXPORT_SYMBOL(lprocfs_write_frac_u64_helper);
1385
1386 static char *lprocfs_strnstr(const char *s1, const char *s2, size_t len)
1387 {
1388         size_t l2;
1389
1390         l2 = strlen(s2);
1391         if (!l2)
1392                 return (char *)s1;
1393         while (len >= l2) {
1394                 len--;
1395                 if (!memcmp(s1, s2, l2))
1396                         return (char *)s1;
1397                 s1++;
1398         }
1399         return NULL;
1400 }
1401
1402 /**
1403  * Find the string \a name in the input \a buffer, and return a pointer to the
1404  * value immediately following \a name, reducing \a count appropriately.
1405  * If \a name is not found the original \a buffer is returned.
1406  */
1407 char *lprocfs_find_named_value(const char *buffer, const char *name,
1408                                size_t *count)
1409 {
1410         char *val;
1411         size_t buflen = *count;
1412
1413         /* there is no strnstr() in rhel5 and ubuntu kernels */
1414         val = lprocfs_strnstr(buffer, name, buflen);
1415         if (val == NULL)
1416                 return (char *)buffer;
1417
1418         val += strlen(name);                         /* skip prefix */
1419         while (val < buffer + buflen && isspace(*val)) /* skip separator */
1420                 val++;
1421
1422         *count = 0;
1423         while (val < buffer + buflen && isalnum(*val)) {
1424                 ++*count;
1425                 ++val;
1426         }
1427
1428         return val - *count;
1429 }
1430 EXPORT_SYMBOL(lprocfs_find_named_value);
1431
1432 int ldebugfs_seq_create(struct dentry *parent,
1433                        const char *name,
1434                        umode_t mode,
1435                        const struct file_operations *seq_fops,
1436                        void *data)
1437 {
1438         struct dentry *entry;
1439
1440         /* Disallow secretly (un)writable entries. */
1441         LASSERT((seq_fops->write == NULL) == ((mode & 0222) == 0));
1442
1443         entry = debugfs_create_file(name, mode, parent, data, seq_fops);
1444         if (IS_ERR_OR_NULL(entry))
1445                 return entry ? PTR_ERR(entry) : -ENOMEM;
1446
1447         return 0;
1448 }
1449 EXPORT_SYMBOL(ldebugfs_seq_create);
1450
1451 int ldebugfs_obd_seq_create(struct obd_device *dev,
1452                             const char *name,
1453                             umode_t mode,
1454                             const struct file_operations *seq_fops,
1455                             void *data)
1456 {
1457         return ldebugfs_seq_create(dev->obd_debugfs_entry, name,
1458                                    mode, seq_fops, data);
1459 }
1460 EXPORT_SYMBOL(ldebugfs_obd_seq_create);
1461
1462 void lprocfs_oh_tally(struct obd_histogram *oh, unsigned int value)
1463 {
1464         if (value >= OBD_HIST_MAX)
1465                 value = OBD_HIST_MAX - 1;
1466
1467         spin_lock(&oh->oh_lock);
1468         oh->oh_buckets[value]++;
1469         spin_unlock(&oh->oh_lock);
1470 }
1471 EXPORT_SYMBOL(lprocfs_oh_tally);
1472
1473 void lprocfs_oh_tally_log2(struct obd_histogram *oh, unsigned int value)
1474 {
1475         unsigned int val;
1476
1477         for (val = 0; ((1 << val) < value) && (val <= OBD_HIST_MAX); val++)
1478                 ;
1479
1480         lprocfs_oh_tally(oh, val);
1481 }
1482 EXPORT_SYMBOL(lprocfs_oh_tally_log2);
1483
1484 unsigned long lprocfs_oh_sum(struct obd_histogram *oh)
1485 {
1486         unsigned long ret = 0;
1487         int i;
1488
1489         for (i = 0; i < OBD_HIST_MAX; i++)
1490                 ret +=  oh->oh_buckets[i];
1491         return ret;
1492 }
1493 EXPORT_SYMBOL(lprocfs_oh_sum);
1494
1495 void lprocfs_oh_clear(struct obd_histogram *oh)
1496 {
1497         spin_lock(&oh->oh_lock);
1498         memset(oh->oh_buckets, 0, sizeof(oh->oh_buckets));
1499         spin_unlock(&oh->oh_lock);
1500 }
1501 EXPORT_SYMBOL(lprocfs_oh_clear);
1502
1503 static ssize_t lustre_attr_show(struct kobject *kobj,
1504                                 struct attribute *attr, char *buf)
1505 {
1506         struct lustre_attr *a = container_of(attr, struct lustre_attr, attr);
1507
1508         return a->show ? a->show(kobj, attr, buf) : 0;
1509 }
1510
1511 static ssize_t lustre_attr_store(struct kobject *kobj, struct attribute *attr,
1512                                  const char *buf, size_t len)
1513 {
1514         struct lustre_attr *a = container_of(attr, struct lustre_attr, attr);
1515
1516         return a->store ? a->store(kobj, attr, buf, len) : len;
1517 }
1518
1519 const struct sysfs_ops lustre_sysfs_ops = {
1520         .show  = lustre_attr_show,
1521         .store = lustre_attr_store,
1522 };
1523 EXPORT_SYMBOL_GPL(lustre_sysfs_ops);