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 #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         LPROCFS_CLIMP_EXIT(obd);
 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         LPROCFS_CLIMP_EXIT(obd);
 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         libcfs_nid2str_r(imp->imp_connection->c_peer.nid,
 669                          nidstr, sizeof(nidstr));
 670         seq_printf(m,
 671                       "]\n"
 672                       "       current_connection: %s\n"
 673                       "       connection_attempts: %u\n"
 674                       "       generation: %u\n"
 675                       "       in-progress_invalidations: %u\n",
 676                       imp->imp_connection == NULL ? "<none>" : nidstr,
 677                       imp->imp_conn_cnt,
 678                       imp->imp_generation,
 679                       atomic_read(&imp->imp_inval_count));
 680         spin_unlock(&imp->imp_lock);
 681
 682         if (obd->obd_svc_stats == NULL)
 683                 goto out_climp;
 684
 685         header = &obd->obd_svc_stats->ls_cnt_header[PTLRPC_REQWAIT_CNTR];
 686         lprocfs_stats_collect(obd->obd_svc_stats, PTLRPC_REQWAIT_CNTR, &ret);
 687         if (ret.lc_count != 0) {
 688                 /* first argument to do_div MUST be __u64 */
 689                 __u64 sum = ret.lc_sum;
 690
 691                 do_div(sum, ret.lc_count);
 692                 ret.lc_sum = sum;
 693         } else
 694                 ret.lc_sum = 0;
 695         seq_printf(m,
 696                       "    rpcs:\n"
 697                       "       inflight: %u\n"
 698                       "       unregistering: %u\n"
 699                       "       timeouts: %u\n"
 700                       "       avg_waittime: %llu %s\n",
 701                       atomic_read(&imp->imp_inflight),
 702                       atomic_read(&imp->imp_unregistering),
 703                       atomic_read(&imp->imp_timeouts),
 704                       ret.lc_sum, header->lc_units);
 705
 706         k = 0;
 707         for (j = 0; j < IMP_AT_MAX_PORTALS; j++) {
 708                 if (imp->imp_at.iat_portal[j] == 0)
 709                         break;
 710                 k = max_t(unsigned int, k,
 711                           at_get(&imp->imp_at.iat_service_estimate[j]));
 712         }
 713         seq_printf(m,
 714                       "    service_estimates:\n"
 715                       "       services: %u sec\n"
 716                       "       network: %u sec\n",
 717                       k,
 718                       at_get(&imp->imp_at.iat_net_latency));
 719
 720         seq_printf(m,
 721                       "    transactions:\n"
 722                       "       last_replay: %llu\n"
 723                       "       peer_committed: %llu\n"
 724                       "       last_checked: %llu\n",
 725                       imp->imp_last_replay_transno,
 726                       imp->imp_peer_committed_transno,
 727                       imp->imp_last_transno_checked);
 728
 729         /* avg data rates */
 730         for (rw = 0; rw <= 1; rw++) {
 731                 lprocfs_stats_collect(obd->obd_svc_stats,
 732                                       PTLRPC_LAST_CNTR + BRW_READ_BYTES + rw,
 733                                       &ret);
 734                 if (ret.lc_sum > 0 && ret.lc_count > 0) {
 735                         /* first argument to do_div MUST be __u64 */
 736                         __u64 sum = ret.lc_sum;
 737
 738                         do_div(sum, ret.lc_count);
 739                         ret.lc_sum = sum;
 740                         seq_printf(m,
 741                                       "    %s_data_averages:\n"
 742                                       "       bytes_per_rpc: %llu\n",
 743                                       rw ? "write" : "read",
 744                                       ret.lc_sum);
 745                 }
 746                 k = (int)ret.lc_sum;
 747                 j = opcode_offset(OST_READ + rw) + EXTRA_MAX_OPCODES;
 748                 header = &obd->obd_svc_stats->ls_cnt_header[j];
 749                 lprocfs_stats_collect(obd->obd_svc_stats, j, &ret);
 750                 if (ret.lc_sum > 0 && ret.lc_count != 0) {
 751                         /* first argument to do_div MUST be __u64 */
 752                         __u64 sum = ret.lc_sum;
 753
 754                         do_div(sum, ret.lc_count);
 755                         ret.lc_sum = sum;
 756                         seq_printf(m,
 757                                       "       %s_per_rpc: %llu\n",
 758                                       header->lc_units, ret.lc_sum);
 759                         j = (int)ret.lc_sum;
 760                         if (j > 0)
 761                                 seq_printf(m,
 762                                               "       MB_per_sec: %u.%.02u\n",
 763                                               k / j, (100 * k / j) % 100);
 764                 }
 765         }
 766
 767 out_climp:
 768         LPROCFS_CLIMP_EXIT(obd);
 769         return 0;
 770 }
 771 EXPORT_SYMBOL(lprocfs_rd_import);
 772
 773 int lprocfs_rd_state(struct seq_file *m, void *data)
 774 {
 775         struct obd_device *obd = data;
 776         struct obd_import *imp;
 777         int j, k, rc;
 778
 779         LASSERT(obd != NULL);
 780         rc = lprocfs_climp_check(obd);
 781         if (rc)
 782                 return rc;
 783
 784         imp = obd->u.cli.cl_import;
 785
 786         seq_printf(m, "current_state: %s\n",
 787                      ptlrpc_import_state_name(imp->imp_state));
 788         seq_printf(m, "state_history:\n");
 789         k = imp->imp_state_hist_idx;
 790         for (j = 0; j < IMP_STATE_HIST_LEN; j++) {
 791                 struct import_state_hist *ish =
 792                         &imp->imp_state_hist[(k + j) % IMP_STATE_HIST_LEN];
 793                 if (ish->ish_state == 0)
 794                         continue;
 795                 seq_printf(m, " - [%lld, %s]\n", (s64)ish->ish_time,
 796                            ptlrpc_import_state_name(ish->ish_state));
 797         }
 798
 799         LPROCFS_CLIMP_EXIT(obd);
 800         return 0;
 801 }
 802 EXPORT_SYMBOL(lprocfs_rd_state);
 803
 804 int lprocfs_at_hist_helper(struct seq_file *m, struct adaptive_timeout *at)
 805 {
 806         int i;
 807
 808         for (i = 0; i < AT_BINS; i++)
 809                 seq_printf(m, "%3u ", at->at_hist[i]);
 810         seq_printf(m, "\n");
 811         return 0;
 812 }
 813 EXPORT_SYMBOL(lprocfs_at_hist_helper);
 814
 815 /* See also ptlrpc_lprocfs_rd_timeouts */
 816 int lprocfs_rd_timeouts(struct seq_file *m, void *data)
 817 {
 818         struct obd_device *obd = data;
 819         struct obd_import *imp;
 820         unsigned int cur, worst;
 821         time64_t now, worstt;
 822         struct dhms ts;
 823         int i, rc;
 824
 825         LASSERT(obd != NULL);
 826         rc = lprocfs_climp_check(obd);
 827         if (rc)
 828                 return rc;
 829
 830         imp = obd->u.cli.cl_import;
 831
 832         now = ktime_get_real_seconds();
 833
 834         /* Some network health info for kicks */
 835         s2dhms(&ts, now - imp->imp_last_reply_time);
 836         seq_printf(m, "%-10s : %lld, " DHMS_FMT " ago\n",
 837                    "last reply", (s64)imp->imp_last_reply_time, DHMS_VARS(&ts));
 838
 839         cur = at_get(&imp->imp_at.iat_net_latency);
 840         worst = imp->imp_at.iat_net_latency.at_worst_ever;
 841         worstt = imp->imp_at.iat_net_latency.at_worst_time;
 842         s2dhms(&ts, now - worstt);
 843         seq_printf(m, "%-10s : cur %3u  worst %3u (at %lld, " DHMS_FMT " ago) ",
 844                    "network", cur, worst, (s64)worstt, DHMS_VARS(&ts));
 845         lprocfs_at_hist_helper(m, &imp->imp_at.iat_net_latency);
 846
 847         for (i = 0; i < IMP_AT_MAX_PORTALS; i++) {
 848                 if (imp->imp_at.iat_portal[i] == 0)
 849                         break;
 850                 cur = at_get(&imp->imp_at.iat_service_estimate[i]);
 851                 worst = imp->imp_at.iat_service_estimate[i].at_worst_ever;
 852                 worstt = imp->imp_at.iat_service_estimate[i].at_worst_time;
 853                 s2dhms(&ts, now - worstt);
 854                 seq_printf(m, "portal %-2d  : cur %3u  worst %3u (at %lld, "
 855                            DHMS_FMT " ago) ", imp->imp_at.iat_portal[i],
 856                            cur, worst, (s64)worstt, DHMS_VARS(&ts));
 857                 lprocfs_at_hist_helper(m, &imp->imp_at.iat_service_estimate[i]);
 858         }
 859
 860         LPROCFS_CLIMP_EXIT(obd);
 861         return 0;
 862 }
 863 EXPORT_SYMBOL(lprocfs_rd_timeouts);
 864
 865 int lprocfs_rd_connect_flags(struct seq_file *m, void *data)
 866 {
 867         struct obd_device *obd = data;
 868         __u64 flags;
 869         int rc;
 870
 871         rc = lprocfs_climp_check(obd);
 872         if (rc)
 873                 return rc;
 874
 875         flags = obd->u.cli.cl_import->imp_connect_data.ocd_connect_flags;
 876         seq_printf(m, "flags=%#llx\n", flags);
 877         obd_connect_seq_flags2str(m, flags, "\n");
 878         seq_printf(m, "\n");
 879         LPROCFS_CLIMP_EXIT(obd);
 880         return 0;
 881 }
 882 EXPORT_SYMBOL(lprocfs_rd_connect_flags);
 883
 884 static struct attribute *obd_def_attrs[] = {
 885         &lustre_attr_blocksize.attr,
 886         &lustre_attr_kbytestotal.attr,
 887         &lustre_attr_kbytesfree.attr,
 888         &lustre_attr_kbytesavail.attr,
 889         &lustre_attr_filestotal.attr,
 890         &lustre_attr_filesfree.attr,
 891         &lustre_attr_uuid.attr,
 892         NULL,
 893 };
 894
 895 static void obd_sysfs_release(struct kobject *kobj)
 896 {
 897         struct obd_device *obd = container_of(kobj, struct obd_device,
 898                                               obd_kobj);
 899
 900         complete(&obd->obd_kobj_unregister);
 901 }
 902
 903 static struct kobj_type obd_ktype = {
 904         .default_attrs  = obd_def_attrs,
 905         .sysfs_ops      = &lustre_sysfs_ops,
 906         .release        = obd_sysfs_release,
 907 };
 908
 909 int lprocfs_obd_setup(struct obd_device *obd, struct lprocfs_vars *list,
 910                       struct attribute_group *attrs)
 911 {
 912         int rc = 0;
 913
 914         init_completion(&obd->obd_kobj_unregister);
 915         rc = kobject_init_and_add(&obd->obd_kobj, &obd_ktype,
 916                                   obd->obd_type->typ_kobj,
 917                                   "%s", obd->obd_name);
 918         if (rc)
 919                 return rc;
 920
 921         if (attrs) {
 922                 rc = sysfs_create_group(&obd->obd_kobj, attrs);
 923                 if (rc) {
 924                         kobject_put(&obd->obd_kobj);
 925                         return rc;
 926                 }
 927         }
 928
 929         obd->obd_debugfs_entry = ldebugfs_register(obd->obd_name,
 930                                                    obd->obd_type->typ_debugfs_entry,
 931                                                    list, obd);
 932         if (IS_ERR_OR_NULL(obd->obd_debugfs_entry)) {
 933                 rc = obd->obd_debugfs_entry ? PTR_ERR(obd->obd_debugfs_entry)
 934                                             : -ENOMEM;
 935                 CERROR("error %d setting up lprocfs for %s\n",
 936                        rc, obd->obd_name);
 937                 obd->obd_debugfs_entry = NULL;
 938         }
 939
 940         return rc;
 941 }
 942 EXPORT_SYMBOL(lprocfs_obd_setup);
 943
 944 int lprocfs_obd_cleanup(struct obd_device *obd)
 945 {
 946         if (!obd)
 947                 return -EINVAL;
 948
 949         if (!IS_ERR_OR_NULL(obd->obd_debugfs_entry))
 950                 ldebugfs_remove(&obd->obd_debugfs_entry);
 951
 952         kobject_put(&obd->obd_kobj);
 953         wait_for_completion(&obd->obd_kobj_unregister);
 954
 955         return 0;
 956 }
 957 EXPORT_SYMBOL(lprocfs_obd_cleanup);
 958
 959 int lprocfs_stats_alloc_one(struct lprocfs_stats *stats, unsigned int cpuid)
 960 {
 961         struct lprocfs_counter  *cntr;
 962         unsigned int            percpusize;
 963         int                     rc = -ENOMEM;
 964         unsigned long           flags = 0;
 965         int                     i;
 966
 967         LASSERT(stats->ls_percpu[cpuid] == NULL);
 968         LASSERT((stats->ls_flags & LPROCFS_STATS_FLAG_NOPERCPU) == 0);
 969
 970         percpusize = lprocfs_stats_counter_size(stats);
 971         LIBCFS_ALLOC_ATOMIC(stats->ls_percpu[cpuid], percpusize);
 972         if (stats->ls_percpu[cpuid] != NULL) {
 973                 rc = 0;
 974                 if (unlikely(stats->ls_biggest_alloc_num <= cpuid)) {
 975                         if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE)
 976                                 spin_lock_irqsave(&stats->ls_lock, flags);
 977                         else
 978                                 spin_lock(&stats->ls_lock);
 979                         if (stats->ls_biggest_alloc_num <= cpuid)
 980                                 stats->ls_biggest_alloc_num = cpuid + 1;
 981                         if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE)
 982                                 spin_unlock_irqrestore(&stats->ls_lock, flags);
 983                         else
 984                                 spin_unlock(&stats->ls_lock);
 985                 }
 986                 /* initialize the ls_percpu[cpuid] non-zero counter */
 987                 for (i = 0; i < stats->ls_num; ++i) {
 988                         cntr = lprocfs_stats_counter_get(stats, cpuid, i);
 989                         cntr->lc_min = LC_MIN_INIT;
 990                 }
 991         }
 992         return rc;
 993 }
 994 EXPORT_SYMBOL(lprocfs_stats_alloc_one);
 995
 996 struct lprocfs_stats *lprocfs_alloc_stats(unsigned int num,
 997                                           enum lprocfs_stats_flags flags)
 998 {
 999         struct lprocfs_stats    *stats;
1000         unsigned int            num_entry;
1001         unsigned int            percpusize = 0;
1002         int                     i;
1003
1004         if (num == 0)
1005                 return NULL;
1006
1007         if (lprocfs_no_percpu_stats != 0)
1008                 flags |= LPROCFS_STATS_FLAG_NOPERCPU;
1009
1010         if (flags & LPROCFS_STATS_FLAG_NOPERCPU)
1011                 num_entry = 1;
1012         else
1013                 num_entry = num_possible_cpus();
1014
1015         /* alloc percpu pointers for all possible cpu slots */
1016         LIBCFS_ALLOC(stats, offsetof(typeof(*stats), ls_percpu[num_entry]));
1017         if (stats == NULL)
1018                 return NULL;
1019
1020         stats->ls_num = num;
1021         stats->ls_flags = flags;
1022         spin_lock_init(&stats->ls_lock);
1023
1024         /* alloc num of counter headers */
1025         LIBCFS_ALLOC(stats->ls_cnt_header,
1026                      stats->ls_num * sizeof(struct lprocfs_counter_header));
1027         if (stats->ls_cnt_header == NULL)
1028                 goto fail;
1029
1030         if ((flags & LPROCFS_STATS_FLAG_NOPERCPU) != 0) {
1031                 /* contains only one set counters */
1032                 percpusize = lprocfs_stats_counter_size(stats);
1033                 LIBCFS_ALLOC_ATOMIC(stats->ls_percpu[0], percpusize);
1034                 if (stats->ls_percpu[0] == NULL)
1035                         goto fail;
1036                 stats->ls_biggest_alloc_num = 1;
1037         } else if ((flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0) {
1038                 /* alloc all percpu data */
1039                 for (i = 0; i < num_entry; ++i)
1040                         if (lprocfs_stats_alloc_one(stats, i) < 0)
1041                                 goto fail;
1042         }
1043
1044         return stats;
1045
1046 fail:
1047         lprocfs_free_stats(&stats);
1048         return NULL;
1049 }
1050 EXPORT_SYMBOL(lprocfs_alloc_stats);
1051
1052 void lprocfs_free_stats(struct lprocfs_stats **statsh)
1053 {
1054         struct lprocfs_stats *stats = *statsh;
1055         unsigned int num_entry;
1056         unsigned int percpusize;
1057         unsigned int i;
1058
1059         if (stats == NULL || stats->ls_num == 0)
1060                 return;
1061         *statsh = NULL;
1062
1063         if (stats->ls_flags & LPROCFS_STATS_FLAG_NOPERCPU)
1064                 num_entry = 1;
1065         else
1066                 num_entry = num_possible_cpus();
1067
1068         percpusize = lprocfs_stats_counter_size(stats);
1069         for (i = 0; i < num_entry; i++)
1070                 if (stats->ls_percpu[i] != NULL)
1071                         LIBCFS_FREE(stats->ls_percpu[i], percpusize);
1072         if (stats->ls_cnt_header != NULL)
1073                 LIBCFS_FREE(stats->ls_cnt_header, stats->ls_num *
1074                                         sizeof(struct lprocfs_counter_header));
1075         LIBCFS_FREE(stats, offsetof(typeof(*stats), ls_percpu[num_entry]));
1076 }
1077 EXPORT_SYMBOL(lprocfs_free_stats);
1078
1079 void lprocfs_clear_stats(struct lprocfs_stats *stats)
1080 {
1081         struct lprocfs_counter          *percpu_cntr;
1082         int                             i;
1083         int                             j;
1084         unsigned int                    num_entry;
1085         unsigned long                   flags = 0;
1086
1087         num_entry = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
1088
1089         for (i = 0; i < num_entry; i++) {
1090                 if (stats->ls_percpu[i] == NULL)
1091                         continue;
1092                 for (j = 0; j < stats->ls_num; j++) {
1093                         percpu_cntr = lprocfs_stats_counter_get(stats, i, j);
1094                         percpu_cntr->lc_count           = 0;
1095                         percpu_cntr->lc_min             = LC_MIN_INIT;
1096                         percpu_cntr->lc_max             = 0;
1097                         percpu_cntr->lc_sumsquare       = 0;
1098                         percpu_cntr->lc_sum             = 0;
1099                         if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE)
1100                                 percpu_cntr->lc_sum_irq = 0;
1101                 }
1102         }
1103
1104         lprocfs_stats_unlock(stats, LPROCFS_GET_NUM_CPU, &flags);
1105 }
1106 EXPORT_SYMBOL(lprocfs_clear_stats);
1107
1108 static ssize_t lprocfs_stats_seq_write(struct file *file,
1109                                        const char __user *buf,
1110                                        size_t len, loff_t *off)
1111 {
1112         struct seq_file *seq = file->private_data;
1113         struct lprocfs_stats *stats = seq->private;
1114
1115         lprocfs_clear_stats(stats);
1116
1117         return len;
1118 }
1119
1120 static void *lprocfs_stats_seq_start(struct seq_file *p, loff_t *pos)
1121 {
1122         struct lprocfs_stats *stats = p->private;
1123
1124         return (*pos < stats->ls_num) ? pos : NULL;
1125 }
1126
1127 static void lprocfs_stats_seq_stop(struct seq_file *p, void *v)
1128 {
1129 }
1130
1131 static void *lprocfs_stats_seq_next(struct seq_file *p, void *v, loff_t *pos)
1132 {
1133         (*pos)++;
1134         return lprocfs_stats_seq_start(p, pos);
1135 }
1136
1137 /* seq file export of one lprocfs counter */
1138 static int lprocfs_stats_seq_show(struct seq_file *p, void *v)
1139 {
1140         struct lprocfs_stats            *stats  = p->private;
1141         struct lprocfs_counter_header   *hdr;
1142         struct lprocfs_counter           ctr;
1143         int                              idx    = *(loff_t *)v;
1144
1145         if (idx == 0) {
1146                 struct timespec64 now;
1147
1148                 ktime_get_real_ts64(&now);
1149                 seq_printf(p, "%-25s %llu.%9lu secs.usecs\n",
1150                            "snapshot_time",
1151                            (s64)now.tv_sec, (unsigned long)now.tv_nsec);
1152         }
1153
1154         hdr = &stats->ls_cnt_header[idx];
1155         lprocfs_stats_collect(stats, idx, &ctr);
1156
1157         if (ctr.lc_count != 0) {
1158                 seq_printf(p, "%-25s %lld samples [%s]",
1159                            hdr->lc_name, ctr.lc_count, hdr->lc_units);
1160
1161                 if ((hdr->lc_config & LPROCFS_CNTR_AVGMINMAX) &&
1162                     (ctr.lc_count > 0)) {
1163                         seq_printf(p, " %lld %lld %lld",
1164                                    ctr.lc_min, ctr.lc_max, ctr.lc_sum);
1165                         if (hdr->lc_config & LPROCFS_CNTR_STDDEV)
1166                                 seq_printf(p, " %lld", ctr.lc_sumsquare);
1167                 }
1168                 seq_putc(p, '\n');
1169         }
1170
1171         return 0;
1172 }
1173
1174 static const struct seq_operations lprocfs_stats_seq_sops = {
1175         .start  = lprocfs_stats_seq_start,
1176         .stop   = lprocfs_stats_seq_stop,
1177         .next   = lprocfs_stats_seq_next,
1178         .show   = lprocfs_stats_seq_show,
1179 };
1180
1181 static int lprocfs_stats_seq_open(struct inode *inode, struct file *file)
1182 {
1183         struct seq_file *seq;
1184         int rc;
1185
1186         rc = seq_open(file, &lprocfs_stats_seq_sops);
1187         if (rc)
1188                 return rc;
1189
1190         seq = file->private_data;
1191         seq->private = inode->i_private;
1192
1193         return 0;
1194 }
1195
1196 struct file_operations lprocfs_stats_seq_fops = {
1197         .owner   = THIS_MODULE,
1198         .open    = lprocfs_stats_seq_open,
1199         .read    = seq_read,
1200         .write   = lprocfs_stats_seq_write,
1201         .llseek  = seq_lseek,
1202         .release = lprocfs_seq_release,
1203 };
1204
1205 int ldebugfs_register_stats(struct dentry *parent, const char *name,
1206                            struct lprocfs_stats *stats)
1207 {
1208         struct dentry *entry;
1209
1210         LASSERT(!IS_ERR_OR_NULL(parent));
1211
1212         entry = debugfs_create_file(name, 0644, parent, stats,
1213                                     &lprocfs_stats_seq_fops);
1214         if (IS_ERR_OR_NULL(entry))
1215                 return entry ? PTR_ERR(entry) : -ENOMEM;
1216
1217         return 0;
1218 }
1219 EXPORT_SYMBOL(ldebugfs_register_stats);
1220
1221 void lprocfs_counter_init(struct lprocfs_stats *stats, int index,
1222                           unsigned conf, const char *name, const char *units)
1223 {
1224         struct lprocfs_counter_header   *header;
1225         struct lprocfs_counter          *percpu_cntr;
1226         unsigned long                   flags = 0;
1227         unsigned int                    i;
1228         unsigned int                    num_cpu;
1229
1230         LASSERT(stats != NULL);
1231
1232         header = &stats->ls_cnt_header[index];
1233         LASSERTF(header != NULL, "Failed to allocate stats header:[%d]%s/%s\n",
1234                  index, name, units);
1235
1236         header->lc_config = conf;
1237         header->lc_name   = name;
1238         header->lc_units  = units;
1239
1240         num_cpu = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
1241         for (i = 0; i < num_cpu; ++i) {
1242                 if (stats->ls_percpu[i] == NULL)
1243                         continue;
1244                 percpu_cntr = lprocfs_stats_counter_get(stats, i, index);
1245                 percpu_cntr->lc_count           = 0;
1246                 percpu_cntr->lc_min             = LC_MIN_INIT;
1247                 percpu_cntr->lc_max             = 0;
1248                 percpu_cntr->lc_sumsquare       = 0;
1249                 percpu_cntr->lc_sum             = 0;
1250                 if ((stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0)
1251                         percpu_cntr->lc_sum_irq = 0;
1252         }
1253         lprocfs_stats_unlock(stats, LPROCFS_GET_NUM_CPU, &flags);
1254 }
1255 EXPORT_SYMBOL(lprocfs_counter_init);
1256
1257 int lprocfs_exp_cleanup(struct obd_export *exp)
1258 {
1259         return 0;
1260 }
1261 EXPORT_SYMBOL(lprocfs_exp_cleanup);
1262
1263 __s64 lprocfs_read_helper(struct lprocfs_counter *lc,
1264                           struct lprocfs_counter_header *header,
1265                           enum lprocfs_stats_flags flags,
1266                           enum lprocfs_fields_flags field)
1267 {
1268         __s64 ret = 0;
1269
1270         if (lc == NULL || header == NULL)
1271                 return 0;
1272
1273         switch (field) {
1274         case LPROCFS_FIELDS_FLAGS_CONFIG:
1275                 ret = header->lc_config;
1276                 break;
1277         case LPROCFS_FIELDS_FLAGS_SUM:
1278                 ret = lc->lc_sum;
1279                 if ((flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0)
1280                         ret += lc->lc_sum_irq;
1281                 break;
1282         case LPROCFS_FIELDS_FLAGS_MIN:
1283                 ret = lc->lc_min;
1284                 break;
1285         case LPROCFS_FIELDS_FLAGS_MAX:
1286                 ret = lc->lc_max;
1287                 break;
1288         case LPROCFS_FIELDS_FLAGS_AVG:
1289                 ret = (lc->lc_max - lc->lc_min) / 2;
1290                 break;
1291         case LPROCFS_FIELDS_FLAGS_SUMSQUARE:
1292                 ret = lc->lc_sumsquare;
1293                 break;
1294         case LPROCFS_FIELDS_FLAGS_COUNT:
1295                 ret = lc->lc_count;
1296                 break;
1297         default:
1298                 break;
1299         }
1300
1301         return 0;
1302 }
1303 EXPORT_SYMBOL(lprocfs_read_helper);
1304
1305 int lprocfs_write_helper(const char __user *buffer, unsigned long count,
1306                          int *val)
1307 {
1308         return lprocfs_write_frac_helper(buffer, count, val, 1);
1309 }
1310 EXPORT_SYMBOL(lprocfs_write_helper);
1311
1312 int lprocfs_write_u64_helper(const char __user *buffer, unsigned long count,
1313                              __u64 *val)
1314 {
1315         return lprocfs_write_frac_u64_helper(buffer, count, val, 1);
1316 }
1317 EXPORT_SYMBOL(lprocfs_write_u64_helper);
1318
1319 int lprocfs_write_frac_u64_helper(const char *buffer, unsigned long count,
1320                               __u64 *val, int mult)
1321 {
1322         char kernbuf[22], *end, *pbuf;
1323         __u64 whole, frac = 0, units;
1324         unsigned frac_d = 1;
1325         int sign = 1;
1326
1327         if (count > (sizeof(kernbuf) - 1))
1328                 return -EINVAL;
1329
1330         if (copy_from_user(kernbuf, buffer, count))
1331                 return -EFAULT;
1332
1333         kernbuf[count] = '\0';
1334         pbuf = kernbuf;
1335         if (*pbuf == '-') {
1336                 sign = -1;
1337                 pbuf++;
1338         }
1339
1340         whole = simple_strtoull(pbuf, &end, 10);
1341         if (pbuf == end)
1342                 return -EINVAL;
1343
1344         if (*end == '.') {
1345                 int i;
1346
1347                 pbuf = end + 1;
1348
1349                 /* need to limit frac_d to a __u32 */
1350                 if (strlen(pbuf) > 10)
1351                         pbuf[10] = '\0';
1352
1353                 frac = simple_strtoull(pbuf, &end, 10);
1354                 /* count decimal places */
1355                 for (i = 0; i < (end - pbuf); i++)
1356                         frac_d *= 10;
1357         }
1358
1359         units = 1;
1360         switch (tolower(*end)) {
1361         case 'p':
1362                 units <<= 10;
1363         case 't':
1364                 units <<= 10;
1365         case 'g':
1366                 units <<= 10;
1367         case 'm':
1368                 units <<= 10;
1369         case 'k':
1370                 units <<= 10;
1371         }
1372         /* Specified units override the multiplier */
1373         if (units > 1)
1374                 mult = units;
1375
1376         frac *= mult;
1377         do_div(frac, frac_d);
1378         *val = sign * (whole * mult + frac);
1379         return 0;
1380 }
1381 EXPORT_SYMBOL(lprocfs_write_frac_u64_helper);
1382
1383 static char *lprocfs_strnstr(const char *s1, const char *s2, size_t len)
1384 {
1385         size_t l2;
1386
1387         l2 = strlen(s2);
1388         if (!l2)
1389                 return (char *)s1;
1390         while (len >= l2) {
1391                 len--;
1392                 if (!memcmp(s1, s2, l2))
1393                         return (char *)s1;
1394                 s1++;
1395         }
1396         return NULL;
1397 }
1398
1399 /**
1400  * Find the string \a name in the input \a buffer, and return a pointer to the
1401  * value immediately following \a name, reducing \a count appropriately.
1402  * If \a name is not found the original \a buffer is returned.
1403  */
1404 char *lprocfs_find_named_value(const char *buffer, const char *name,
1405                                size_t *count)
1406 {
1407         char *val;
1408         size_t buflen = *count;
1409
1410         /* there is no strnstr() in rhel5 and ubuntu kernels */
1411         val = lprocfs_strnstr(buffer, name, buflen);
1412         if (val == NULL)
1413                 return (char *)buffer;
1414
1415         val += strlen(name);                         /* skip prefix */
1416         while (val < buffer + buflen && isspace(*val)) /* skip separator */
1417                 val++;
1418
1419         *count = 0;
1420         while (val < buffer + buflen && isalnum(*val)) {
1421                 ++*count;
1422                 ++val;
1423         }
1424
1425         return val - *count;
1426 }
1427 EXPORT_SYMBOL(lprocfs_find_named_value);
1428
1429 int ldebugfs_seq_create(struct dentry *parent,
1430                        const char *name,
1431                        umode_t mode,
1432                        const struct file_operations *seq_fops,
1433                        void *data)
1434 {
1435         struct dentry *entry;
1436
1437         /* Disallow secretly (un)writable entries. */
1438         LASSERT((seq_fops->write == NULL) == ((mode & 0222) == 0));
1439
1440         entry = debugfs_create_file(name, mode, parent, data, seq_fops);
1441         if (IS_ERR_OR_NULL(entry))
1442                 return entry ? PTR_ERR(entry) : -ENOMEM;
1443
1444         return 0;
1445 }
1446 EXPORT_SYMBOL(ldebugfs_seq_create);
1447
1448 int ldebugfs_obd_seq_create(struct obd_device *dev,
1449                             const char *name,
1450                             umode_t mode,
1451                             const struct file_operations *seq_fops,
1452                             void *data)
1453 {
1454         return ldebugfs_seq_create(dev->obd_debugfs_entry, name,
1455                                    mode, seq_fops, data);
1456 }
1457 EXPORT_SYMBOL(ldebugfs_obd_seq_create);
1458
1459 void lprocfs_oh_tally(struct obd_histogram *oh, unsigned int value)
1460 {
1461         if (value >= OBD_HIST_MAX)
1462                 value = OBD_HIST_MAX - 1;
1463
1464         spin_lock(&oh->oh_lock);
1465         oh->oh_buckets[value]++;
1466         spin_unlock(&oh->oh_lock);
1467 }
1468 EXPORT_SYMBOL(lprocfs_oh_tally);
1469
1470 void lprocfs_oh_tally_log2(struct obd_histogram *oh, unsigned int value)
1471 {
1472         unsigned int val;
1473
1474         for (val = 0; ((1 << val) < value) && (val <= OBD_HIST_MAX); val++)
1475                 ;
1476
1477         lprocfs_oh_tally(oh, val);
1478 }
1479 EXPORT_SYMBOL(lprocfs_oh_tally_log2);
1480
1481 unsigned long lprocfs_oh_sum(struct obd_histogram *oh)
1482 {
1483         unsigned long ret = 0;
1484         int i;
1485
1486         for (i = 0; i < OBD_HIST_MAX; i++)
1487                 ret +=  oh->oh_buckets[i];
1488         return ret;
1489 }
1490 EXPORT_SYMBOL(lprocfs_oh_sum);
1491
1492 void lprocfs_oh_clear(struct obd_histogram *oh)
1493 {
1494         spin_lock(&oh->oh_lock);
1495         memset(oh->oh_buckets, 0, sizeof(oh->oh_buckets));
1496         spin_unlock(&oh->oh_lock);
1497 }
1498 EXPORT_SYMBOL(lprocfs_oh_clear);
1499
1500 static ssize_t lustre_attr_show(struct kobject *kobj,
1501                                 struct attribute *attr, char *buf)
1502 {
1503         struct lustre_attr *a = container_of(attr, struct lustre_attr, attr);
1504
1505         return a->show ? a->show(kobj, attr, buf) : 0;
1506 }
1507
1508 static ssize_t lustre_attr_store(struct kobject *kobj, struct attribute *attr,
1509                                  const char *buf, size_t len)
1510 {
1511         struct lustre_attr *a = container_of(attr, struct lustre_attr, attr);
1512
1513         return a->store ? a->store(kobj, attr, buf, len) : len;
1514 }
1515
1516 const struct sysfs_ops lustre_sysfs_ops = {
1517         .show  = lustre_attr_show,
1518         .store = lustre_attr_store,
1519 };
1520 EXPORT_SYMBOL_GPL(lustre_sysfs_ops);