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 <obd_class.h>
  44 #include <lprocfs_status.h>
  45 #include <lustre/lustre_idl.h>
  46
  47 #ifdef CONFIG_PROC_FS
  48
  49 static int lprocfs_no_percpu_stats = 0;
  50 CFS_MODULE_PARM(lprocfs_no_percpu_stats, "i", int, 0644,
  51                 "Do not alloc percpu data for lprocfs stats");
  52
  53 #define MAX_STRING_SIZE 128
  54
  55 int lprocfs_single_release(struct inode *inode, struct file *file)
  56 {
  57         return single_release(inode, file);
  58 }
  59 EXPORT_SYMBOL(lprocfs_single_release);
  60
  61 int lprocfs_seq_release(struct inode *inode, struct file *file)
  62 {
  63         return seq_release(inode, file);
  64 }
  65 EXPORT_SYMBOL(lprocfs_seq_release);
  66
  67 struct proc_dir_entry *
  68 lprocfs_add_simple(struct proc_dir_entry *root, char *name,
  69                    void *data, const struct file_operations *fops)
  70 {
  71         struct proc_dir_entry *proc;
  72         mode_t mode = 0;
  73
  74         if (root == NULL || name == NULL || fops == NULL)
  75                 return ERR_PTR(-EINVAL);
  76
  77         if (fops->read)
  78                 mode = 0444;
  79         if (fops->write)
  80                 mode |= 0200;
  81         proc = proc_create_data(name, mode, root, fops, data);
  82         if (!proc) {
  83                 CERROR("LprocFS: No memory to create /proc entry %s\n",
  84                        name);
  85                 return ERR_PTR(-ENOMEM);
  86         }
  87         return proc;
  88 }
  89 EXPORT_SYMBOL(lprocfs_add_simple);
  90
  91 struct proc_dir_entry *lprocfs_add_symlink(const char *name,
  92                         struct proc_dir_entry *parent, const char *format, ...)
  93 {
  94         struct proc_dir_entry *entry;
  95         char *dest;
  96         va_list ap;
  97
  98         if (parent == NULL || format == NULL)
  99                 return NULL;
 100
 101         OBD_ALLOC_WAIT(dest, MAX_STRING_SIZE + 1);
 102         if (dest == NULL)
 103                 return NULL;
 104
 105         va_start(ap, format);
 106         vsnprintf(dest, MAX_STRING_SIZE, format, ap);
 107         va_end(ap);
 108
 109         entry = proc_symlink(name, parent, dest);
 110         if (entry == NULL)
 111                 CERROR("LprocFS: Could not create symbolic link from "
 112                        "%s to %s\n", name, dest);
 113
 114         OBD_FREE(dest, MAX_STRING_SIZE + 1);
 115         return entry;
 116 }
 117 EXPORT_SYMBOL(lprocfs_add_symlink);
 118
 119 static const struct file_operations lprocfs_generic_fops = { };
 120
 121 /**
 122  * Add /proc entries.
 123  *
 124  * \param root [in]  The parent proc entry on which new entry will be added.
 125  * \param list [in]  Array of proc entries to be added.
 126  * \param data [in]  The argument to be passed when entries read/write routines
 127  *                   are called through /proc file.
 128  *
 129  * \retval 0   on success
 130  *         < 0 on error
 131  */
 132 int
 133 lprocfs_add_vars(struct proc_dir_entry *root, struct lprocfs_vars *list,
 134                  void *data)
 135 {
 136         if (root == NULL || list == NULL)
 137                 return -EINVAL;
 138
 139         while (list->name != NULL) {
 140                 struct proc_dir_entry *proc;
 141                 mode_t mode = 0;
 142
 143                 if (list->proc_mode != 0000) {
 144                         mode = list->proc_mode;
 145                 } else if (list->fops) {
 146                         if (list->fops->read)
 147                                 mode = 0444;
 148                         if (list->fops->write)
 149                                 mode |= 0200;
 150                 }
 151                 proc = proc_create_data(list->name, mode, root,
 152                                         list->fops ?: &lprocfs_generic_fops,
 153                                         list->data ?: data);
 154                 if (proc == NULL)
 155                         return -ENOMEM;
 156                 list++;
 157         }
 158         return 0;
 159 }
 160 EXPORT_SYMBOL(lprocfs_add_vars);
 161
 162 #ifndef HAVE_REMOVE_PROC_SUBTREE
 163 /* for b=10866, global variable */
 164 DECLARE_RWSEM(_lprocfs_lock);
 165 EXPORT_SYMBOL(_lprocfs_lock);
 166
 167 static void lprocfs_remove_nolock(struct proc_dir_entry **proot)
 168 {
 169         struct proc_dir_entry *root = *proot;
 170         struct proc_dir_entry *temp = root;
 171         struct proc_dir_entry *rm_entry;
 172         struct proc_dir_entry *parent;
 173
 174         *proot = NULL;
 175         if (root == NULL || IS_ERR(root))
 176                 return;
 177
 178         parent = root->parent;
 179         LASSERT(parent != NULL);
 180
 181         while (1) {
 182                 while (temp->subdir != NULL)
 183                         temp = temp->subdir;
 184
 185                 rm_entry = temp;
 186                 temp = temp->parent;
 187
 188                 /* Memory corruption once caused this to fail, and
 189                    without this LASSERT we would loop here forever. */
 190                 LASSERTF(strlen(rm_entry->name) == rm_entry->namelen,
 191                          "0x%p  %s/%s len %d\n", rm_entry, temp->name,
 192                          rm_entry->name, (int)strlen(rm_entry->name));
 193
 194                 remove_proc_entry(rm_entry->name, temp);
 195                 if (temp == parent)
 196                         break;
 197         }
 198 }
 199
 200 int remove_proc_subtree(const char *name, struct proc_dir_entry *parent)
 201 {
 202         struct proc_dir_entry    *t = NULL;
 203         struct proc_dir_entry   **p;
 204         int                       len, busy = 0;
 205
 206         LASSERT(parent != NULL);
 207         len = strlen(name);
 208
 209         down_write(&_lprocfs_lock);
 210         /* lookup target name */
 211         for (p = &parent->subdir; *p; p = &(*p)->next) {
 212                 if ((*p)->namelen != len)
 213                         continue;
 214                 if (memcmp(name, (*p)->name, len))
 215                         continue;
 216                 t = *p;
 217                 break;
 218         }
 219
 220         if (t) {
 221                 /* verify it's empty: do not count "num_refs" */
 222                 for (p = &t->subdir; *p; p = &(*p)->next) {
 223                         if ((*p)->namelen != strlen("num_refs")) {
 224                                 busy = 1;
 225                                 break;
 226                         }
 227                         if (memcmp("num_refs", (*p)->name,
 228                                    strlen("num_refs"))) {
 229                                 busy = 1;
 230                                 break;
 231                         }
 232                 }
 233         }
 234
 235         if (busy == 0)
 236                 lprocfs_remove_nolock(&t);
 237
 238         up_write(&_lprocfs_lock);
 239         return 0;
 240 }
 241 #endif /* !HAVE_REMOVE_PROC_SUBTREE */
 242
 243 #ifndef HAVE_PROC_REMOVE
 244 void proc_remove(struct proc_dir_entry *de)
 245 {
 246 #ifndef HAVE_REMOVE_PROC_SUBTREE
 247         down_write(&_lprocfs_lock); /* search vs remove race */
 248         lprocfs_remove_nolock(&de);
 249         up_write(&_lprocfs_lock);
 250 #else
 251         if (de)
 252                 remove_proc_subtree(de->name, de->parent);
 253 #endif
 254 }
 255 #endif
 256
 257 void lprocfs_remove(struct proc_dir_entry **rooth)
 258 {
 259         proc_remove(*rooth);
 260         *rooth = NULL;
 261 }
 262 EXPORT_SYMBOL(lprocfs_remove);
 263
 264 void lprocfs_remove_proc_entry(const char *name, struct proc_dir_entry *parent)
 265 {
 266         LASSERT(parent != NULL);
 267         remove_proc_entry(name, parent);
 268 }
 269 EXPORT_SYMBOL(lprocfs_remove_proc_entry);
 270
 271 struct proc_dir_entry *
 272 lprocfs_register(const char *name, struct proc_dir_entry *parent,
 273                  struct lprocfs_vars *list, void *data)
 274 {
 275         struct proc_dir_entry *newchild;
 276
 277         newchild = proc_mkdir(name, parent);
 278         if (newchild == NULL)
 279                 return ERR_PTR(-ENOMEM);
 280
 281         if (list != NULL) {
 282                 int rc = lprocfs_add_vars(newchild, list, data);
 283                 if (rc) {
 284                         lprocfs_remove(&newchild);
 285                         return ERR_PTR(rc);
 286                 }
 287         }
 288         return newchild;
 289 }
 290 EXPORT_SYMBOL(lprocfs_register);
 291
 292 /* Generic callbacks */
 293 int lprocfs_uint_seq_show(struct seq_file *m, void *data)
 294 {
 295         return seq_printf(m, "%u\n", *(unsigned int *)data);
 296 }
 297 EXPORT_SYMBOL(lprocfs_uint_seq_show);
 298
 299 int lprocfs_wr_uint(struct file *file, const char __user *buffer,
 300                     unsigned long count, void *data)
 301 {
 302         unsigned *p = data;
 303         char dummy[MAX_STRING_SIZE + 1], *end;
 304         unsigned long tmp;
 305
 306         dummy[MAX_STRING_SIZE] = '\0';
 307         if (copy_from_user(dummy, buffer, MAX_STRING_SIZE))
 308                 return -EFAULT;
 309
 310         tmp = simple_strtoul(dummy, &end, 0);
 311         if (dummy == end)
 312                 return -EINVAL;
 313
 314         *p = (unsigned int)tmp;
 315         return count;
 316 }
 317 EXPORT_SYMBOL(lprocfs_wr_uint);
 318
 319 ssize_t lprocfs_uint_seq_write(struct file *file, const char __user *buffer,
 320                                size_t count, loff_t *off)
 321 {
 322         int *data = ((struct seq_file *)file->private_data)->private;
 323         int val = 0, rc;
 324
 325         rc = lprocfs_write_helper(buffer, count, &val);
 326         if (rc < 0)
 327                 return rc;
 328
 329         return lprocfs_wr_uint(file, buffer, count, data);
 330 }
 331 EXPORT_SYMBOL(lprocfs_uint_seq_write);
 332
 333 int lprocfs_u64_seq_show(struct seq_file *m, void *data)
 334 {
 335         LASSERT(data != NULL);
 336         return seq_printf(m, LPU64"\n", *(__u64 *)data);
 337 }
 338 EXPORT_SYMBOL(lprocfs_u64_seq_show);
 339
 340 int lprocfs_atomic_seq_show(struct seq_file *m, void *data)
 341 {
 342         atomic_t *atom = data;
 343         LASSERT(atom != NULL);
 344         return seq_printf(m, "%d\n", atomic_read(atom));
 345 }
 346 EXPORT_SYMBOL(lprocfs_atomic_seq_show);
 347
 348 ssize_t
 349 lprocfs_atomic_seq_write(struct file *file, const char __user *buffer,
 350                         size_t count, loff_t *off)
 351 {
 352         atomic_t *atm = ((struct seq_file *)file->private_data)->private;
 353         int val = 0;
 354         int rc;
 355
 356         rc = lprocfs_write_helper(buffer, count, &val);
 357         if (rc < 0)
 358                 return rc;
 359
 360         if (val <= 0)
 361                 return -ERANGE;
 362
 363         atomic_set(atm, val);
 364         return count;
 365 }
 366 EXPORT_SYMBOL(lprocfs_atomic_seq_write);
 367
 368 int lprocfs_uuid_seq_show(struct seq_file *m, void *data)
 369 {
 370         struct obd_device *obd = data;
 371
 372         LASSERT(obd != NULL);
 373         return seq_printf(m, "%s\n", obd->obd_uuid.uuid);
 374 }
 375 EXPORT_SYMBOL(lprocfs_uuid_seq_show);
 376
 377 int lprocfs_name_seq_show(struct seq_file *m, void *data)
 378 {
 379         struct obd_device *dev = data;
 380
 381         LASSERT(dev != NULL);
 382         return seq_printf(m, "%s\n", dev->obd_name);
 383 }
 384 EXPORT_SYMBOL(lprocfs_name_seq_show);
 385
 386 int lprocfs_blksize_seq_show(struct seq_file *m, void *data)
 387 {
 388         struct obd_device *obd = data;
 389         struct obd_statfs  osfs;
 390         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 391                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 392                             OBD_STATFS_NODELAY);
 393         if (!rc)
 394                 rc = seq_printf(m, "%u\n", osfs.os_bsize);
 395         return rc;
 396 }
 397 EXPORT_SYMBOL(lprocfs_blksize_seq_show);
 398
 399 int lprocfs_kbytestotal_seq_show(struct seq_file *m, void *data)
 400 {
 401         struct obd_device *obd = data;
 402         struct obd_statfs  osfs;
 403         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 404                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 405                             OBD_STATFS_NODELAY);
 406         if (!rc) {
 407                 __u32 blk_size = osfs.os_bsize >> 10;
 408                 __u64 result = osfs.os_blocks;
 409
 410                 while (blk_size >>= 1)
 411                         result <<= 1;
 412
 413                 rc = seq_printf(m, LPU64"\n", result);
 414         }
 415         return rc;
 416 }
 417 EXPORT_SYMBOL(lprocfs_kbytestotal_seq_show);
 418
 419 int lprocfs_kbytesfree_seq_show(struct seq_file *m, void *data)
 420 {
 421         struct obd_device *obd = data;
 422         struct obd_statfs  osfs;
 423         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 424                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 425                             OBD_STATFS_NODELAY);
 426         if (!rc) {
 427                 __u32 blk_size = osfs.os_bsize >> 10;
 428                 __u64 result = osfs.os_bfree;
 429
 430                 while (blk_size >>= 1)
 431                         result <<= 1;
 432
 433                 rc = seq_printf(m, LPU64"\n", result);
 434         }
 435         return rc;
 436 }
 437 EXPORT_SYMBOL(lprocfs_kbytesfree_seq_show);
 438
 439 int lprocfs_kbytesavail_seq_show(struct seq_file *m, void *data)
 440 {
 441         struct obd_device *obd = data;
 442         struct obd_statfs  osfs;
 443         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 444                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 445                             OBD_STATFS_NODELAY);
 446         if (!rc) {
 447                 __u32 blk_size = osfs.os_bsize >> 10;
 448                 __u64 result = osfs.os_bavail;
 449
 450                 while (blk_size >>= 1)
 451                         result <<= 1;
 452
 453                 rc = seq_printf(m, LPU64"\n", result);
 454         }
 455         return rc;
 456 }
 457 EXPORT_SYMBOL(lprocfs_kbytesavail_seq_show);
 458
 459 int lprocfs_filestotal_seq_show(struct seq_file *m, void *data)
 460 {
 461         struct obd_device *obd = data;
 462         struct obd_statfs  osfs;
 463         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 464                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 465                             OBD_STATFS_NODELAY);
 466         if (!rc)
 467                 rc = seq_printf(m, LPU64"\n", osfs.os_files);
 468         return rc;
 469 }
 470 EXPORT_SYMBOL(lprocfs_filestotal_seq_show);
 471
 472 int lprocfs_filesfree_seq_show(struct seq_file *m, void *data)
 473 {
 474         struct obd_device *obd = data;
 475         struct obd_statfs  osfs;
 476         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 477                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 478                             OBD_STATFS_NODELAY);
 479         if (!rc)
 480                 rc = seq_printf(m, LPU64"\n", osfs.os_ffree);
 481         return rc;
 482 }
 483 EXPORT_SYMBOL(lprocfs_filesfree_seq_show);
 484
 485 int lprocfs_server_uuid_seq_show(struct seq_file *m, void *data)
 486 {
 487         struct obd_device *obd = data;
 488         struct obd_import *imp;
 489         char *imp_state_name = NULL;
 490         int rc = 0;
 491
 492         LASSERT(obd != NULL);
 493         LPROCFS_CLIMP_CHECK(obd);
 494         imp = obd->u.cli.cl_import;
 495         imp_state_name = ptlrpc_import_state_name(imp->imp_state);
 496         rc = seq_printf(m, "%s\t%s%s\n", obd2cli_tgt(obd), imp_state_name,
 497                         imp->imp_deactive ? "\tDEACTIVATED" : "");
 498
 499         LPROCFS_CLIMP_EXIT(obd);
 500         return rc;
 501 }
 502 EXPORT_SYMBOL(lprocfs_server_uuid_seq_show);
 503
 504 int lprocfs_conn_uuid_seq_show(struct seq_file *m, void *data)
 505 {
 506         struct obd_device *obd = data;
 507         struct ptlrpc_connection *conn;
 508         int rc = 0;
 509
 510         LASSERT(obd != NULL);
 511
 512         LPROCFS_CLIMP_CHECK(obd);
 513         conn = obd->u.cli.cl_import->imp_connection;
 514         if (conn && obd->u.cli.cl_import)
 515                 rc = seq_printf(m, "%s\n", conn->c_remote_uuid.uuid);
 516         else
 517                 rc = seq_printf(m, "%s\n", "<none>");
 518
 519         LPROCFS_CLIMP_EXIT(obd);
 520         return rc;
 521 }
 522 EXPORT_SYMBOL(lprocfs_conn_uuid_seq_show);
 523
 524 /** add up per-cpu counters */
 525 void lprocfs_stats_collect(struct lprocfs_stats *stats, int idx,
 526                            struct lprocfs_counter *cnt)
 527 {
 528         unsigned int                    num_entry;
 529         struct lprocfs_counter          *percpu_cntr;
 530         int                             i;
 531         unsigned long                   flags = 0;
 532
 533         memset(cnt, 0, sizeof(*cnt));
 534
 535         if (stats == NULL) {
 536                 /* set count to 1 to avoid divide-by-zero errs in callers */
 537                 cnt->lc_count = 1;
 538                 return;
 539         }
 540
 541         cnt->lc_min = LC_MIN_INIT;
 542
 543         num_entry = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
 544
 545         for (i = 0; i < num_entry; i++) {
 546                 if (stats->ls_percpu[i] == NULL)
 547                         continue;
 548                 percpu_cntr = lprocfs_stats_counter_get(stats, i, idx);
 549
 550                 cnt->lc_count += percpu_cntr->lc_count;
 551                 cnt->lc_sum += percpu_cntr->lc_sum;
 552                 if (percpu_cntr->lc_min < cnt->lc_min)
 553                         cnt->lc_min = percpu_cntr->lc_min;
 554                 if (percpu_cntr->lc_max > cnt->lc_max)
 555                         cnt->lc_max = percpu_cntr->lc_max;
 556                 cnt->lc_sumsquare += percpu_cntr->lc_sumsquare;
 557         }
 558
 559         lprocfs_stats_unlock(stats, LPROCFS_GET_NUM_CPU, &flags);
 560 }
 561
 562 /**
 563  * Append a space separated list of current set flags to str.
 564  */
 565 #define flag2str(flag)                                          \
 566         do {                                                            \
 567                 if (imp->imp_##flag) {                                  \
 568                         seq_printf(m, "%s" #flag, first ? "" : ", ");   \
 569                         first = false;                                  \
 570                 }                                                       \
 571         } while (0)
 572 static void obd_import_flags2str(struct obd_import *imp, struct seq_file *m)
 573 {
 574         bool first = true;
 575
 576         if (imp->imp_obd->obd_no_recov) {
 577                 seq_printf(m, "no_recov");
 578                 first = false;
 579         }
 580
 581         flag2str(invalid);
 582         flag2str(deactive);
 583         flag2str(replayable);
 584         flag2str(delayed_recovery);
 585         flag2str(no_lock_replay);
 586         flag2str(vbr_failed);
 587         flag2str(pingable);
 588         flag2str(resend_replay);
 589         flag2str(no_pinger_recover);
 590         flag2str(need_mne_swab);
 591         flag2str(connect_tried);
 592 }
 593 #undef flag2str
 594
 595 static const char *obd_connect_names[] = {
 596         "read_only",
 597         "lov_index",
 598         "connect_from_mds",
 599         "write_grant",
 600         "server_lock",
 601         "version",
 602         "request_portal",
 603         "acl",
 604         "xattr",
 605         "create_on_write",
 606         "truncate_lock",
 607         "initial_transno",
 608         "inode_bit_locks",
 609         "join_file(obsolete)",
 610         "getattr_by_fid",
 611         "no_oh_for_devices",
 612         "remote_client",
 613         "remote_client_by_force",
 614         "max_byte_per_rpc",
 615         "64bit_qdata",
 616         "mds_capability",
 617         "oss_capability",
 618         "early_lock_cancel",
 619         "som",
 620         "adaptive_timeouts",
 621         "lru_resize",
 622         "mds_mds_connection",
 623         "real_conn",
 624         "change_qunit_size",
 625         "alt_checksum_algorithm",
 626         "fid_is_enabled",
 627         "version_recovery",
 628         "pools",
 629         "grant_shrink",
 630         "skip_orphan",
 631         "large_ea",
 632         "full20",
 633         "layout_lock",
 634         "64bithash",
 635         "object_max_bytes",
 636         "imp_recov",
 637         "jobstats",
 638         "umask",
 639         "einprogress",
 640         "grant_param",
 641         "flock_owner",
 642         "lvb_type",
 643         "nanoseconds_times",
 644         "lightweight_conn",
 645         "short_io",
 646         "pingless",
 647         "flock_deadlock",
 648         "disp_stripe",
 649         "open_by_fid",
 650         "lfsck",
 651         "unknown",
 652         "unlink_close",
 653         "multi_mod_rpcs",
 654         "dir_stripe",
 655         "fileset_mount",
 656         "lock_ahead",
 657         "bulk_mbits",
 658         "compact_obdo",
 659         NULL
 660 };
 661
 662 static void obd_connect_seq_flags2str(struct seq_file *m, __u64 flags, char *sep)
 663 {
 664         bool first = true;
 665         __u64 mask = 1;
 666         int i;
 667
 668         for (i = 0; obd_connect_names[i] != NULL; i++, mask <<= 1) {
 669                 if (flags & mask) {
 670                         seq_printf(m, "%s%s",
 671                                    first ? "" : sep, obd_connect_names[i]);
 672                         first = false;
 673                 }
 674         }
 675         if (flags & ~(mask - 1))
 676                 seq_printf(m, "%sunknown_"LPX64,
 677                            first ? "" : sep, flags & ~(mask - 1));
 678 }
 679
 680 int obd_connect_flags2str(char *page, int count, __u64 flags, char *sep)
 681 {
 682         __u64 mask = 1;
 683         int i, ret = 0;
 684
 685         for (i = 0; obd_connect_names[i] != NULL; i++, mask <<= 1) {
 686                 if (flags & mask)
 687                         ret += snprintf(page + ret, count - ret, "%s%s",
 688                                         ret ? sep : "", obd_connect_names[i]);
 689         }
 690         if (flags & ~(mask - 1))
 691                 ret += snprintf(page + ret, count - ret,
 692                                 "%sunknown_"LPX64,
 693                                 ret ? sep : "", flags & ~(mask - 1));
 694         return ret;
 695 }
 696 EXPORT_SYMBOL(obd_connect_flags2str);
 697
 698 static void obd_connect_data_seqprint(struct seq_file *m,
 699                                       struct obd_connect_data *ocd)
 700 {
 701         __u64 flags;
 702
 703         LASSERT(ocd != NULL);
 704         flags = ocd->ocd_connect_flags;
 705
 706         seq_printf(m, "    connect_data:\n"
 707                       "       flags: "LPX64"\n"
 708                       "       instance: %u\n",
 709                       ocd->ocd_connect_flags,
 710                       ocd->ocd_instance);
 711         if (flags & OBD_CONNECT_VERSION)
 712                 seq_printf(m, "       target_version: %u.%u.%u.%u\n",
 713                               OBD_OCD_VERSION_MAJOR(ocd->ocd_version),
 714                               OBD_OCD_VERSION_MINOR(ocd->ocd_version),
 715                               OBD_OCD_VERSION_PATCH(ocd->ocd_version),
 716                               OBD_OCD_VERSION_FIX(ocd->ocd_version));
 717         if (flags & OBD_CONNECT_MDS)
 718                 seq_printf(m, "       mdt_index: %d\n", ocd->ocd_group);
 719         if (flags & OBD_CONNECT_GRANT)
 720                 seq_printf(m, "       initial_grant: %d\n", ocd->ocd_grant);
 721         if (flags & OBD_CONNECT_INDEX)
 722                 seq_printf(m, "       target_index: %u\n", ocd->ocd_index);
 723         if (flags & OBD_CONNECT_BRW_SIZE)
 724                 seq_printf(m, "       max_brw_size: %d\n", ocd->ocd_brw_size);
 725         if (flags & OBD_CONNECT_IBITS)
 726                 seq_printf(m, "       ibits_known: "LPX64"\n",
 727                                 ocd->ocd_ibits_known);
 728         if (flags & OBD_CONNECT_GRANT_PARAM)
 729                 seq_printf(m, "       grant_block_size: %d\n"
 730                               "       grant_inode_size: %d\n"
 731                               "       grant_extent_overhead: %d\n",
 732                               ocd->ocd_blocksize,
 733                               ocd->ocd_inodespace,
 734                               ocd->ocd_grant_extent);
 735         if (flags & OBD_CONNECT_TRANSNO)
 736                 seq_printf(m, "       first_transno: "LPX64"\n",
 737                                 ocd->ocd_transno);
 738         if (flags & OBD_CONNECT_CKSUM)
 739                 seq_printf(m, "       cksum_types: %#x\n",
 740                               ocd->ocd_cksum_types);
 741         if (flags & OBD_CONNECT_MAX_EASIZE)
 742                 seq_printf(m, "       max_easize: %d\n", ocd->ocd_max_easize);
 743         if (flags & OBD_CONNECT_MAXBYTES)
 744                 seq_printf(m, "       max_object_bytes: "LPU64"\n",
 745                               ocd->ocd_maxbytes);
 746         if (flags & OBD_CONNECT_MULTIMODRPCS)
 747                 seq_printf(m, "       max_mod_rpcs: %hu\n",
 748                               ocd->ocd_maxmodrpcs);
 749 }
 750
 751 int lprocfs_import_seq_show(struct seq_file *m, void *data)
 752 {
 753         char                            nidstr[LNET_NIDSTR_SIZE];
 754         struct lprocfs_counter          ret;
 755         struct lprocfs_counter_header   *header;
 756         struct obd_device               *obd    = (struct obd_device *)data;
 757         struct obd_import               *imp;
 758         struct obd_import_conn          *conn;
 759         struct obd_connect_data         *ocd;
 760         int                             j;
 761         int                             k;
 762         int                             rw      = 0;
 763
 764         LASSERT(obd != NULL);
 765         LPROCFS_CLIMP_CHECK(obd);
 766         imp = obd->u.cli.cl_import;
 767         ocd = &imp->imp_connect_data;
 768
 769         seq_printf(m, "import:\n"
 770                       "    name: %s\n"
 771                       "    target: %s\n"
 772                       "    state: %s\n"
 773                       "    connect_flags: [ ",
 774                       obd->obd_name,
 775                       obd2cli_tgt(obd),
 776                       ptlrpc_import_state_name(imp->imp_state));
 777         obd_connect_seq_flags2str(m, imp->imp_connect_data.ocd_connect_flags,
 778                                         ", ");
 779         seq_printf(m, " ]\n");
 780         obd_connect_data_seqprint(m, ocd);
 781         seq_printf(m, "    import_flags: [ ");
 782         obd_import_flags2str(imp, m);
 783
 784         seq_printf(m, " ]\n"
 785                       "    connection:\n"
 786                       "       failover_nids: [ ");
 787         spin_lock(&imp->imp_lock);
 788         j = 0;
 789         list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
 790                 libcfs_nid2str_r(conn->oic_conn->c_peer.nid,
 791                                  nidstr, sizeof(nidstr));
 792                 seq_printf(m, "%s%s", j ? ", " : "", nidstr);
 793                 j++;
 794         }
 795         if (imp->imp_connection != NULL)
 796                 libcfs_nid2str_r(imp->imp_connection->c_peer.nid,
 797                                  nidstr, sizeof(nidstr));
 798         else
 799                 strncpy(nidstr, "<none>", sizeof(nidstr));
 800         seq_printf(m, " ]\n"
 801                       "       current_connection: %s\n"
 802                       "       connection_attempts: %u\n"
 803                       "       generation: %u\n"
 804                       "       in-progress_invalidations: %u\n",
 805                       nidstr,
 806                       imp->imp_conn_cnt,
 807                       imp->imp_generation,
 808                       atomic_read(&imp->imp_inval_count));
 809         spin_unlock(&imp->imp_lock);
 810
 811         if (obd->obd_svc_stats == NULL)
 812                 goto out_climp;
 813
 814         header = &obd->obd_svc_stats->ls_cnt_header[PTLRPC_REQWAIT_CNTR];
 815         lprocfs_stats_collect(obd->obd_svc_stats, PTLRPC_REQWAIT_CNTR, &ret);
 816         if (ret.lc_count != 0) {
 817                 /* first argument to do_div MUST be __u64 */
 818                 __u64 sum = ret.lc_sum;
 819                 do_div(sum, ret.lc_count);
 820                 ret.lc_sum = sum;
 821         } else
 822                 ret.lc_sum = 0;
 823         seq_printf(m, "    rpcs:\n"
 824                       "       inflight: %u\n"
 825                       "       unregistering: %u\n"
 826                       "       timeouts: %u\n"
 827                       "       avg_waittime: "LPU64" %s\n",
 828                       atomic_read(&imp->imp_inflight),
 829                       atomic_read(&imp->imp_unregistering),
 830                       atomic_read(&imp->imp_timeouts),
 831                       ret.lc_sum, header->lc_units);
 832
 833         k = 0;
 834         for(j = 0; j < IMP_AT_MAX_PORTALS; j++) {
 835                 if (imp->imp_at.iat_portal[j] == 0)
 836                         break;
 837                 k = max_t(unsigned int, k,
 838                           at_get(&imp->imp_at.iat_service_estimate[j]));
 839         }
 840         seq_printf(m, "    service_estimates:\n"
 841                       "       services: %u sec\n"
 842                       "       network: %u sec\n",
 843                       k,
 844                       at_get(&imp->imp_at.iat_net_latency));
 845
 846         seq_printf(m, "    transactions:\n"
 847                       "       last_replay: "LPU64"\n"
 848                       "       peer_committed: "LPU64"\n"
 849                       "       last_checked: "LPU64"\n",
 850                       imp->imp_last_replay_transno,
 851                       imp->imp_peer_committed_transno,
 852                       imp->imp_last_transno_checked);
 853
 854         /* avg data rates */
 855         for (rw = 0; rw <= 1; rw++) {
 856                 lprocfs_stats_collect(obd->obd_svc_stats,
 857                                       PTLRPC_LAST_CNTR + BRW_READ_BYTES + rw,
 858                                       &ret);
 859                 if (ret.lc_sum > 0 && ret.lc_count > 0) {
 860                         /* first argument to do_div MUST be __u64 */
 861                         __u64 sum = ret.lc_sum;
 862                         do_div(sum, ret.lc_count);
 863                         ret.lc_sum = sum;
 864                         seq_printf(m, "    %s_data_averages:\n"
 865                                       "       bytes_per_rpc: "LPU64"\n",
 866                                       rw ? "write" : "read",
 867                                       ret.lc_sum);
 868                 }
 869                 k = (int)ret.lc_sum;
 870                 j = opcode_offset(OST_READ + rw) + EXTRA_MAX_OPCODES;
 871                 header = &obd->obd_svc_stats->ls_cnt_header[j];
 872                 lprocfs_stats_collect(obd->obd_svc_stats, j, &ret);
 873                 if (ret.lc_sum > 0 && ret.lc_count != 0) {
 874                         /* first argument to do_div MUST be __u64 */
 875                         __u64 sum = ret.lc_sum;
 876                         do_div(sum, ret.lc_count);
 877                         ret.lc_sum = sum;
 878                         seq_printf(m, "       %s_per_rpc: "LPU64"\n",
 879                                         header->lc_units, ret.lc_sum);
 880                         j = (int)ret.lc_sum;
 881                         if (j > 0)
 882                                 seq_printf(m, "       MB_per_sec: %u.%.02u\n",
 883                                                 k / j, (100 * k / j) % 100);
 884                 }
 885         }
 886
 887 out_climp:
 888         LPROCFS_CLIMP_EXIT(obd);
 889         return 0;
 890 }
 891 EXPORT_SYMBOL(lprocfs_import_seq_show);
 892
 893 int lprocfs_state_seq_show(struct seq_file *m, void *data)
 894 {
 895         struct obd_device *obd = (struct obd_device *)data;
 896         struct obd_import *imp;
 897         int j, k;
 898
 899         LASSERT(obd != NULL);
 900         LPROCFS_CLIMP_CHECK(obd);
 901         imp = obd->u.cli.cl_import;
 902
 903         seq_printf(m, "current_state: %s\n",
 904                    ptlrpc_import_state_name(imp->imp_state));
 905         seq_printf(m, "state_history:\n");
 906         k = imp->imp_state_hist_idx;
 907         for (j = 0; j < IMP_STATE_HIST_LEN; j++) {
 908                 struct import_state_hist *ish =
 909                         &imp->imp_state_hist[(k + j) % IMP_STATE_HIST_LEN];
 910                 if (ish->ish_state == 0)
 911                         continue;
 912                 seq_printf(m, " - [ "CFS_TIME_T", %s ]\n",
 913                            ish->ish_time,
 914                 ptlrpc_import_state_name(ish->ish_state));
 915         }
 916
 917         LPROCFS_CLIMP_EXIT(obd);
 918         return 0;
 919 }
 920 EXPORT_SYMBOL(lprocfs_state_seq_show);
 921
 922 int lprocfs_at_hist_helper(struct seq_file *m, struct adaptive_timeout *at)
 923 {
 924         int i;
 925         for (i = 0; i < AT_BINS; i++)
 926                 seq_printf(m, "%3u ", at->at_hist[i]);
 927         seq_printf(m, "\n");
 928         return 0;
 929 }
 930 EXPORT_SYMBOL(lprocfs_at_hist_helper);
 931
 932 /* See also ptlrpc_lprocfs_timeouts_show_seq */
 933 int lprocfs_timeouts_seq_show(struct seq_file *m, void *data)
 934 {
 935         struct obd_device *obd = (struct obd_device *)data;
 936         struct obd_import *imp;
 937         unsigned int cur, worst;
 938         time_t now, worstt;
 939         struct dhms ts;
 940         int i;
 941
 942         LASSERT(obd != NULL);
 943         LPROCFS_CLIMP_CHECK(obd);
 944         imp = obd->u.cli.cl_import;
 945
 946         now = cfs_time_current_sec();
 947
 948         /* Some network health info for kicks */
 949         s2dhms(&ts, now - imp->imp_last_reply_time);
 950         seq_printf(m, "%-10s : %ld, "DHMS_FMT" ago\n",
 951                    "last reply", imp->imp_last_reply_time, DHMS_VARS(&ts));
 952
 953         cur = at_get(&imp->imp_at.iat_net_latency);
 954         worst = imp->imp_at.iat_net_latency.at_worst_ever;
 955         worstt = imp->imp_at.iat_net_latency.at_worst_time;
 956         s2dhms(&ts, now - worstt);
 957         seq_printf(m, "%-10s : cur %3u  worst %3u (at %ld, "DHMS_FMT" ago) ",
 958                    "network", cur, worst, worstt, DHMS_VARS(&ts));
 959         lprocfs_at_hist_helper(m, &imp->imp_at.iat_net_latency);
 960
 961         for(i = 0; i < IMP_AT_MAX_PORTALS; i++) {
 962                 if (imp->imp_at.iat_portal[i] == 0)
 963                         break;
 964                 cur = at_get(&imp->imp_at.iat_service_estimate[i]);
 965                 worst = imp->imp_at.iat_service_estimate[i].at_worst_ever;
 966                 worstt = imp->imp_at.iat_service_estimate[i].at_worst_time;
 967                 s2dhms(&ts, now - worstt);
 968                 seq_printf(m, "portal %-2d  : cur %3u  worst %3u (at %ld, "
 969                            DHMS_FMT" ago) ", imp->imp_at.iat_portal[i],
 970                            cur, worst, worstt, DHMS_VARS(&ts));
 971                 lprocfs_at_hist_helper(m, &imp->imp_at.iat_service_estimate[i]);
 972         }
 973
 974         LPROCFS_CLIMP_EXIT(obd);
 975         return 0;
 976 }
 977 EXPORT_SYMBOL(lprocfs_timeouts_seq_show);
 978
 979 int lprocfs_connect_flags_seq_show(struct seq_file *m, void *data)
 980 {
 981         struct obd_device *obd = data;
 982         __u64 flags;
 983
 984         LPROCFS_CLIMP_CHECK(obd);
 985         flags = obd->u.cli.cl_import->imp_connect_data.ocd_connect_flags;
 986         seq_printf(m, "flags="LPX64"\n", flags);
 987         obd_connect_seq_flags2str(m, flags, "\n");
 988         seq_printf(m, "\n");
 989         LPROCFS_CLIMP_EXIT(obd);
 990         return 0;
 991 }
 992 EXPORT_SYMBOL(lprocfs_connect_flags_seq_show);
 993
 994 int
 995 lprocfs_obd_setup(struct obd_device *obd)
 996 {
 997         int rc = 0;
 998
 999         LASSERT(obd != NULL);
1000         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1001         LASSERT(obd->obd_type->typ_procroot != NULL);
1002
1003         obd->obd_proc_entry = lprocfs_register(obd->obd_name,
1004                                                obd->obd_type->typ_procroot,
1005                                                obd->obd_vars, obd);
1006         if (IS_ERR(obd->obd_proc_entry)) {
1007                 rc = PTR_ERR(obd->obd_proc_entry);
1008                 CERROR("error %d setting up lprocfs for %s\n",rc,obd->obd_name);
1009                 obd->obd_proc_entry = NULL;
1010         }
1011         return rc;
1012 }
1013 EXPORT_SYMBOL(lprocfs_obd_setup);
1014
1015 int lprocfs_obd_cleanup(struct obd_device *obd)
1016 {
1017         if (!obd)
1018                 return -EINVAL;
1019         if (obd->obd_proc_exports_entry) {
1020                 /* Should be no exports left */
1021                 lprocfs_remove(&obd->obd_proc_exports_entry);
1022                 obd->obd_proc_exports_entry = NULL;
1023         }
1024         if (obd->obd_proc_entry) {
1025                 lprocfs_remove(&obd->obd_proc_entry);
1026                 obd->obd_proc_entry = NULL;
1027         }
1028         return 0;
1029 }
1030 EXPORT_SYMBOL(lprocfs_obd_cleanup);
1031
1032 int lprocfs_stats_alloc_one(struct lprocfs_stats *stats, unsigned int cpuid)
1033 {
1034         struct lprocfs_counter  *cntr;
1035         unsigned int            percpusize;
1036         int                     rc = -ENOMEM;
1037         unsigned long           flags = 0;
1038         int                     i;
1039
1040         LASSERT(stats->ls_percpu[cpuid] == NULL);
1041         LASSERT((stats->ls_flags & LPROCFS_STATS_FLAG_NOPERCPU) == 0);
1042
1043         percpusize = lprocfs_stats_counter_size(stats);
1044         LIBCFS_ALLOC_ATOMIC(stats->ls_percpu[cpuid], percpusize);
1045         if (stats->ls_percpu[cpuid] != NULL) {
1046                 rc = 0;
1047                 if (unlikely(stats->ls_biggest_alloc_num <= cpuid)) {
1048                         if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE)
1049                                 spin_lock_irqsave(&stats->ls_lock, flags);
1050                         else
1051                                 spin_lock(&stats->ls_lock);
1052                         if (stats->ls_biggest_alloc_num <= cpuid)
1053                                 stats->ls_biggest_alloc_num = cpuid + 1;
1054                         if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE) {
1055                                 spin_unlock_irqrestore(&stats->ls_lock, flags);
1056                         } else {
1057                                 spin_unlock(&stats->ls_lock);
1058                         }
1059                 }
1060                 /* initialize the ls_percpu[cpuid] non-zero counter */
1061                 for (i = 0; i < stats->ls_num; ++i) {
1062                         cntr = lprocfs_stats_counter_get(stats, cpuid, i);
1063                         cntr->lc_min = LC_MIN_INIT;
1064                 }
1065         }
1066         return rc;
1067 }
1068 EXPORT_SYMBOL(lprocfs_stats_alloc_one);
1069
1070 struct lprocfs_stats *lprocfs_alloc_stats(unsigned int num,
1071                                           enum lprocfs_stats_flags flags)
1072 {
1073         struct lprocfs_stats    *stats;
1074         unsigned int            num_entry;
1075         unsigned int            percpusize = 0;
1076         int                     i;
1077
1078         if (num == 0)
1079                 return NULL;
1080
1081         if (lprocfs_no_percpu_stats != 0)
1082                 flags |= LPROCFS_STATS_FLAG_NOPERCPU;
1083
1084         if (flags & LPROCFS_STATS_FLAG_NOPERCPU)
1085                 num_entry = 1;
1086         else
1087                 num_entry = num_possible_cpus();
1088
1089         /* alloc percpu pointers for all possible cpu slots */
1090         LIBCFS_ALLOC(stats, offsetof(typeof(*stats), ls_percpu[num_entry]));
1091         if (stats == NULL)
1092                 return NULL;
1093
1094         stats->ls_num = num;
1095         stats->ls_flags = flags;
1096         spin_lock_init(&stats->ls_lock);
1097
1098         /* alloc num of counter headers */
1099         LIBCFS_ALLOC(stats->ls_cnt_header,
1100                      stats->ls_num * sizeof(struct lprocfs_counter_header));
1101         if (stats->ls_cnt_header == NULL)
1102                 goto fail;
1103
1104         if ((flags & LPROCFS_STATS_FLAG_NOPERCPU) != 0) {
1105                 /* contains only one set counters */
1106                 percpusize = lprocfs_stats_counter_size(stats);
1107                 LIBCFS_ALLOC_ATOMIC(stats->ls_percpu[0], percpusize);
1108                 if (stats->ls_percpu[0] == NULL)
1109                         goto fail;
1110                 stats->ls_biggest_alloc_num = 1;
1111         } else if ((flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0) {
1112                 /* alloc all percpu data, currently only obd_memory use this */
1113                 for (i = 0; i < num_entry; ++i)
1114                         if (lprocfs_stats_alloc_one(stats, i) < 0)
1115                                 goto fail;
1116         }
1117
1118         return stats;
1119
1120 fail:
1121         lprocfs_free_stats(&stats);
1122         return NULL;
1123 }
1124 EXPORT_SYMBOL(lprocfs_alloc_stats);
1125
1126 void lprocfs_free_stats(struct lprocfs_stats **statsh)
1127 {
1128         struct lprocfs_stats *stats = *statsh;
1129         unsigned int num_entry;
1130         unsigned int percpusize;
1131         unsigned int i;
1132
1133         if (stats == NULL || stats->ls_num == 0)
1134                 return;
1135         *statsh = NULL;
1136
1137         if (stats->ls_flags & LPROCFS_STATS_FLAG_NOPERCPU)
1138                 num_entry = 1;
1139         else
1140                 num_entry = num_possible_cpus();
1141
1142         percpusize = lprocfs_stats_counter_size(stats);
1143         for (i = 0; i < num_entry; i++)
1144                 if (stats->ls_percpu[i] != NULL)
1145                         LIBCFS_FREE(stats->ls_percpu[i], percpusize);
1146         if (stats->ls_cnt_header != NULL)
1147                 LIBCFS_FREE(stats->ls_cnt_header, stats->ls_num *
1148                                         sizeof(struct lprocfs_counter_header));
1149         LIBCFS_FREE(stats, offsetof(typeof(*stats), ls_percpu[num_entry]));
1150 }
1151 EXPORT_SYMBOL(lprocfs_free_stats);
1152
1153 void lprocfs_clear_stats(struct lprocfs_stats *stats)
1154 {
1155         struct lprocfs_counter          *percpu_cntr;
1156         int                             i;
1157         int                             j;
1158         unsigned int                    num_entry;
1159         unsigned long                   flags = 0;
1160
1161         num_entry = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
1162
1163         for (i = 0; i < num_entry; i++) {
1164                 if (stats->ls_percpu[i] == NULL)
1165                         continue;
1166                 for (j = 0; j < stats->ls_num; j++) {
1167                         percpu_cntr = lprocfs_stats_counter_get(stats, i, j);
1168                         percpu_cntr->lc_count           = 0;
1169                         percpu_cntr->lc_min             = LC_MIN_INIT;
1170                         percpu_cntr->lc_max             = 0;
1171                         percpu_cntr->lc_sumsquare       = 0;
1172                         percpu_cntr->lc_sum             = 0;
1173                         if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE)
1174                                 percpu_cntr->lc_sum_irq = 0;
1175                 }
1176         }
1177
1178         lprocfs_stats_unlock(stats, LPROCFS_GET_NUM_CPU, &flags);
1179 }
1180 EXPORT_SYMBOL(lprocfs_clear_stats);
1181
1182 static ssize_t lprocfs_stats_seq_write(struct file *file,
1183                                        const char __user *buf,
1184                                        size_t len, loff_t *off)
1185 {
1186         struct seq_file *seq = file->private_data;
1187         struct lprocfs_stats *stats = seq->private;
1188
1189         lprocfs_clear_stats(stats);
1190
1191         return len;
1192 }
1193
1194 static void *lprocfs_stats_seq_start(struct seq_file *p, loff_t *pos)
1195 {
1196         struct lprocfs_stats *stats = p->private;
1197
1198         return (*pos < stats->ls_num) ? pos : NULL;
1199 }
1200
1201 static void lprocfs_stats_seq_stop(struct seq_file *p, void *v)
1202 {
1203 }
1204
1205 static void *lprocfs_stats_seq_next(struct seq_file *p, void *v, loff_t *pos)
1206 {
1207         (*pos)++;
1208
1209         return lprocfs_stats_seq_start(p, pos);
1210 }
1211
1212 /* seq file export of one lprocfs counter */
1213 static int lprocfs_stats_seq_show(struct seq_file *p, void *v)
1214 {
1215         struct lprocfs_stats            *stats  = p->private;
1216         struct lprocfs_counter_header   *hdr;
1217         struct lprocfs_counter           ctr;
1218         int                              idx    = *(loff_t *)v;
1219         int                              rc     = 0;
1220
1221         if (idx == 0) {
1222                 struct timeval now;
1223
1224                 do_gettimeofday(&now);
1225                 rc = seq_printf(p, "%-25s %lu.%lu secs.usecs\n",
1226                                 "snapshot_time", now.tv_sec, now.tv_usec);
1227                 if (rc < 0)
1228                         return rc;
1229         }
1230
1231         hdr = &stats->ls_cnt_header[idx];
1232         lprocfs_stats_collect(stats, idx, &ctr);
1233
1234         if (ctr.lc_count == 0)
1235                 goto out;
1236
1237         rc = seq_printf(p, "%-25s "LPD64" samples [%s]", hdr->lc_name,
1238                         ctr.lc_count, hdr->lc_units);
1239         if (rc < 0)
1240                 goto out;
1241
1242         if ((hdr->lc_config & LPROCFS_CNTR_AVGMINMAX) && ctr.lc_count > 0) {
1243                 rc = seq_printf(p, " "LPD64" "LPD64" "LPD64,
1244                                 ctr.lc_min, ctr.lc_max, ctr.lc_sum);
1245                 if (rc < 0)
1246                         goto out;
1247                 if (hdr->lc_config & LPROCFS_CNTR_STDDEV)
1248                         rc = seq_printf(p, " "LPD64, ctr.lc_sumsquare);
1249                 if (rc < 0)
1250                         goto out;
1251         }
1252         rc = seq_printf(p, "\n");
1253 out:
1254         return (rc < 0) ? rc : 0;
1255 }
1256
1257 static const struct seq_operations lprocfs_stats_seq_sops = {
1258         .start  = lprocfs_stats_seq_start,
1259         .stop   = lprocfs_stats_seq_stop,
1260         .next   = lprocfs_stats_seq_next,
1261         .show   = lprocfs_stats_seq_show,
1262 };
1263
1264 static int lprocfs_stats_seq_open(struct inode *inode, struct file *file)
1265 {
1266         struct seq_file *seq;
1267         int rc;
1268
1269         rc = LPROCFS_ENTRY_CHECK(inode);
1270         if (rc < 0)
1271                 return rc;
1272
1273         rc = seq_open(file, &lprocfs_stats_seq_sops);
1274         if (rc)
1275                 return rc;
1276         seq = file->private_data;
1277         seq->private = PDE_DATA(inode);
1278         return 0;
1279 }
1280
1281 static const struct file_operations lprocfs_stats_seq_fops = {
1282         .owner   = THIS_MODULE,
1283         .open    = lprocfs_stats_seq_open,
1284         .read    = seq_read,
1285         .write   = lprocfs_stats_seq_write,
1286         .llseek  = seq_lseek,
1287         .release = lprocfs_seq_release,
1288 };
1289
1290 int lprocfs_register_stats(struct proc_dir_entry *root, const char *name,
1291                            struct lprocfs_stats *stats)
1292 {
1293         struct proc_dir_entry *entry;
1294         LASSERT(root != NULL);
1295
1296         entry = proc_create_data(name, 0644, root,
1297                                  &lprocfs_stats_seq_fops, stats);
1298         if (entry == NULL)
1299                 return -ENOMEM;
1300         return 0;
1301 }
1302 EXPORT_SYMBOL(lprocfs_register_stats);
1303
1304 void lprocfs_counter_init(struct lprocfs_stats *stats, int index,
1305                           unsigned conf, const char *name, const char *units)
1306 {
1307         struct lprocfs_counter_header   *header;
1308         struct lprocfs_counter          *percpu_cntr;
1309         unsigned long                   flags = 0;
1310         unsigned int                    i;
1311         unsigned int                    num_cpu;
1312
1313         LASSERT(stats != NULL);
1314
1315         header = &stats->ls_cnt_header[index];
1316         LASSERTF(header != NULL, "Failed to allocate stats header:[%d]%s/%s\n",
1317                  index, name, units);
1318
1319         header->lc_config = conf;
1320         header->lc_name   = name;
1321         header->lc_units  = units;
1322
1323         num_cpu = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
1324         for (i = 0; i < num_cpu; ++i) {
1325                 if (stats->ls_percpu[i] == NULL)
1326                         continue;
1327                 percpu_cntr = lprocfs_stats_counter_get(stats, i, index);
1328                 percpu_cntr->lc_count           = 0;
1329                 percpu_cntr->lc_min             = LC_MIN_INIT;
1330                 percpu_cntr->lc_max             = 0;
1331                 percpu_cntr->lc_sumsquare       = 0;
1332                 percpu_cntr->lc_sum             = 0;
1333                 if ((stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0)
1334                         percpu_cntr->lc_sum_irq = 0;
1335         }
1336         lprocfs_stats_unlock(stats, LPROCFS_GET_NUM_CPU, &flags);
1337 }
1338 EXPORT_SYMBOL(lprocfs_counter_init);
1339
1340 /* Note that we only init md counters for ops whose offset is less
1341  * than NUM_MD_STATS. This is explained in a comment in the definition
1342  * of struct md_ops. */
1343 #define LPROCFS_MD_OP_INIT(base, stats, op)                                    \
1344         do {                                                                   \
1345                 unsigned int _idx = base + MD_COUNTER_OFFSET(op);              \
1346                                                                                \
1347                 if (MD_COUNTER_OFFSET(op) < NUM_MD_STATS) {                    \
1348                         LASSERT(_idx < stats->ls_num);                         \
1349                         lprocfs_counter_init(stats, _idx, 0, #op, "reqs");     \
1350                 }                                                              \
1351         } while (0)
1352
1353 void lprocfs_init_mps_stats(int num_private_stats, struct lprocfs_stats *stats)
1354 {
1355         LPROCFS_MD_OP_INIT(num_private_stats, stats, getstatus);
1356         LPROCFS_MD_OP_INIT(num_private_stats, stats, null_inode);
1357         LPROCFS_MD_OP_INIT(num_private_stats, stats, find_cbdata);
1358         LPROCFS_MD_OP_INIT(num_private_stats, stats, close);
1359         LPROCFS_MD_OP_INIT(num_private_stats, stats, create);
1360         LPROCFS_MD_OP_INIT(num_private_stats, stats, enqueue);
1361         LPROCFS_MD_OP_INIT(num_private_stats, stats, getattr);
1362         LPROCFS_MD_OP_INIT(num_private_stats, stats, getattr_name);
1363         LPROCFS_MD_OP_INIT(num_private_stats, stats, intent_lock);
1364         LPROCFS_MD_OP_INIT(num_private_stats, stats, link);
1365         LPROCFS_MD_OP_INIT(num_private_stats, stats, rename);
1366         LPROCFS_MD_OP_INIT(num_private_stats, stats, setattr);
1367         LPROCFS_MD_OP_INIT(num_private_stats, stats, fsync);
1368         LPROCFS_MD_OP_INIT(num_private_stats, stats, read_page);
1369         LPROCFS_MD_OP_INIT(num_private_stats, stats, unlink);
1370         LPROCFS_MD_OP_INIT(num_private_stats, stats, setxattr);
1371         LPROCFS_MD_OP_INIT(num_private_stats, stats, getxattr);
1372         LPROCFS_MD_OP_INIT(num_private_stats, stats, init_ea_size);
1373         LPROCFS_MD_OP_INIT(num_private_stats, stats, get_lustre_md);
1374         LPROCFS_MD_OP_INIT(num_private_stats, stats, free_lustre_md);
1375         LPROCFS_MD_OP_INIT(num_private_stats, stats, merge_attr);
1376         LPROCFS_MD_OP_INIT(num_private_stats, stats, set_open_replay_data);
1377         LPROCFS_MD_OP_INIT(num_private_stats, stats, clear_open_replay_data);
1378         LPROCFS_MD_OP_INIT(num_private_stats, stats, set_lock_data);
1379         LPROCFS_MD_OP_INIT(num_private_stats, stats, lock_match);
1380         LPROCFS_MD_OP_INIT(num_private_stats, stats, cancel_unused);
1381         LPROCFS_MD_OP_INIT(num_private_stats, stats, get_remote_perm);
1382         LPROCFS_MD_OP_INIT(num_private_stats, stats, intent_getattr_async);
1383         LPROCFS_MD_OP_INIT(num_private_stats, stats, revalidate_lock);
1384 }
1385
1386 int lprocfs_alloc_md_stats(struct obd_device *obd,
1387                            unsigned int num_private_stats)
1388 {
1389         struct lprocfs_stats *stats;
1390         unsigned int num_stats;
1391         int rc, i;
1392
1393         CLASSERT(offsetof(struct md_ops, MD_STATS_FIRST_OP) == 0);
1394         CLASSERT(_MD_COUNTER_OFFSET(MD_STATS_FIRST_OP) == 0);
1395         CLASSERT(_MD_COUNTER_OFFSET(MD_STATS_LAST_OP) > 0);
1396
1397         /* TODO Ensure that this function is only used where
1398          * appropriate by adding an assertion to the effect that
1399          * obd->obd_type->typ_md_ops is not NULL. We can't do this now
1400          * because mdt_procfs_init() uses this function to allocate
1401          * the stats backing /proc/fs/lustre/mdt/.../md_stats but the
1402          * mdt layer does not use the md_ops interface. This is
1403          * confusing and a waste of memory. See LU-2484.
1404          */
1405         LASSERT(obd->obd_proc_entry != NULL);
1406         LASSERT(obd->obd_md_stats == NULL);
1407         LASSERT(obd->obd_md_cntr_base == 0);
1408
1409         num_stats = NUM_MD_STATS + num_private_stats;
1410         stats = lprocfs_alloc_stats(num_stats, 0);
1411         if (stats == NULL)
1412                 return -ENOMEM;
1413
1414         lprocfs_init_mps_stats(num_private_stats, stats);
1415
1416         for (i = num_private_stats; i < num_stats; i++) {
1417                 if (stats->ls_cnt_header[i].lc_name == NULL) {
1418                         CERROR("Missing md_stat initializer md_op "
1419                                "operation at offset %d. Aborting.\n",
1420                                i - num_private_stats);
1421                         LBUG();
1422                 }
1423         }
1424
1425         rc = lprocfs_register_stats(obd->obd_proc_entry, "md_stats", stats);
1426         if (rc < 0) {
1427                 lprocfs_free_stats(&stats);
1428         } else {
1429                 obd->obd_md_stats = stats;
1430                 obd->obd_md_cntr_base = num_private_stats;
1431         }
1432
1433         return rc;
1434 }
1435 EXPORT_SYMBOL(lprocfs_alloc_md_stats);
1436
1437 void lprocfs_free_md_stats(struct obd_device *obd)
1438 {
1439         struct lprocfs_stats *stats = obd->obd_md_stats;
1440
1441         if (stats != NULL) {
1442                 obd->obd_md_stats = NULL;
1443                 obd->obd_md_cntr_base = 0;
1444                 lprocfs_free_stats(&stats);
1445         }
1446 }
1447 EXPORT_SYMBOL(lprocfs_free_md_stats);
1448
1449 void lprocfs_init_ldlm_stats(struct lprocfs_stats *ldlm_stats)
1450 {
1451         lprocfs_counter_init(ldlm_stats,
1452                              LDLM_ENQUEUE - LDLM_FIRST_OPC,
1453                              0, "ldlm_enqueue", "reqs");
1454         lprocfs_counter_init(ldlm_stats,
1455                              LDLM_CONVERT - LDLM_FIRST_OPC,
1456                              0, "ldlm_convert", "reqs");
1457         lprocfs_counter_init(ldlm_stats,
1458                              LDLM_CANCEL - LDLM_FIRST_OPC,
1459                              0, "ldlm_cancel", "reqs");
1460         lprocfs_counter_init(ldlm_stats,
1461                              LDLM_BL_CALLBACK - LDLM_FIRST_OPC,
1462                              0, "ldlm_bl_callback", "reqs");
1463         lprocfs_counter_init(ldlm_stats,
1464                              LDLM_CP_CALLBACK - LDLM_FIRST_OPC,
1465                              0, "ldlm_cp_callback", "reqs");
1466         lprocfs_counter_init(ldlm_stats,
1467                              LDLM_GL_CALLBACK - LDLM_FIRST_OPC,
1468                              0, "ldlm_gl_callback", "reqs");
1469 }
1470 EXPORT_SYMBOL(lprocfs_init_ldlm_stats);
1471
1472 __s64 lprocfs_read_helper(struct lprocfs_counter *lc,
1473                           struct lprocfs_counter_header *header,
1474                           enum lprocfs_stats_flags flags,
1475                           enum lprocfs_fields_flags field)
1476 {
1477         __s64 ret = 0;
1478
1479         if (lc == NULL || header == NULL)
1480                 RETURN(0);
1481
1482         switch (field) {
1483                 case LPROCFS_FIELDS_FLAGS_CONFIG:
1484                         ret = header->lc_config;
1485                         break;
1486                 case LPROCFS_FIELDS_FLAGS_SUM:
1487                         ret = lc->lc_sum;
1488                         if ((flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0)
1489                                 ret += lc->lc_sum_irq;
1490                         break;
1491                 case LPROCFS_FIELDS_FLAGS_MIN:
1492                         ret = lc->lc_min;
1493                         break;
1494                 case LPROCFS_FIELDS_FLAGS_MAX:
1495                         ret = lc->lc_max;
1496                         break;
1497                 case LPROCFS_FIELDS_FLAGS_AVG:
1498                         ret = (lc->lc_max - lc->lc_min) / 2;
1499                         break;
1500                 case LPROCFS_FIELDS_FLAGS_SUMSQUARE:
1501                         ret = lc->lc_sumsquare;
1502                         break;
1503                 case LPROCFS_FIELDS_FLAGS_COUNT:
1504                         ret = lc->lc_count;
1505                         break;
1506                 default:
1507                         break;
1508         };
1509         RETURN(ret);
1510 }
1511 EXPORT_SYMBOL(lprocfs_read_helper);
1512
1513 int lprocfs_write_helper(const char __user *buffer, unsigned long count,
1514                          int *val)
1515 {
1516         return lprocfs_write_frac_helper(buffer, count, val, 1);
1517 }
1518 EXPORT_SYMBOL(lprocfs_write_helper);
1519
1520 int lprocfs_write_frac_helper(const char __user *buffer, unsigned long count,
1521                               int *val, int mult)
1522 {
1523         char kernbuf[20], *end, *pbuf;
1524
1525         if (count > (sizeof(kernbuf) - 1))
1526                 return -EINVAL;
1527
1528         if (copy_from_user(kernbuf, buffer, count))
1529                 return -EFAULT;
1530
1531         kernbuf[count] = '\0';
1532         pbuf = kernbuf;
1533         if (*pbuf == '-') {
1534                 mult = -mult;
1535                 pbuf++;
1536         }
1537
1538         *val = (int)simple_strtoul(pbuf, &end, 10) * mult;
1539         if (pbuf == end)
1540                 return -EINVAL;
1541
1542         if (end != NULL && *end == '.') {
1543                 int temp_val, pow = 1;
1544                 int i;
1545
1546                 pbuf = end + 1;
1547                 if (strlen(pbuf) > 5)
1548                         pbuf[5] = '\0'; /*only allow 5bits fractional*/
1549
1550                 temp_val = (int)simple_strtoul(pbuf, &end, 10) * mult;
1551
1552                 if (pbuf < end) {
1553                         for (i = 0; i < (end - pbuf); i++)
1554                                 pow *= 10;
1555
1556                         *val += temp_val / pow;
1557                 }
1558         }
1559         return 0;
1560 }
1561 EXPORT_SYMBOL(lprocfs_write_frac_helper);
1562
1563 int lprocfs_read_frac_helper(char *buffer, unsigned long count, long val,
1564                              int mult)
1565 {
1566         long decimal_val, frac_val;
1567         int prtn;
1568
1569         if (count < 10)
1570                 return -EINVAL;
1571
1572         decimal_val = val / mult;
1573         prtn = snprintf(buffer, count, "%ld", decimal_val);
1574         frac_val = val % mult;
1575
1576         if (prtn < (count - 4) && frac_val > 0) {
1577                 long temp_frac;
1578                 int i, temp_mult = 1, frac_bits = 0;
1579
1580                 temp_frac = frac_val * 10;
1581                 buffer[prtn++] = '.';
1582                 while (frac_bits < 2 && (temp_frac / mult) < 1 ) {
1583                         /* only reserved 2 bits fraction */
1584                         buffer[prtn++] ='0';
1585                         temp_frac *= 10;
1586                         frac_bits++;
1587                 }
1588                 /*
1589                  * Need to think these cases :
1590                  *      1. #echo x.00 > /proc/xxx       output result : x
1591                  *      2. #echo x.0x > /proc/xxx       output result : x.0x
1592                  *      3. #echo x.x0 > /proc/xxx       output result : x.x
1593                  *      4. #echo x.xx > /proc/xxx       output result : x.xx
1594                  *      Only reserved 2 bits fraction.
1595                  */
1596                 for (i = 0; i < (5 - prtn); i++)
1597                         temp_mult *= 10;
1598
1599                 frac_bits = min((int)count - prtn, 3 - frac_bits);
1600                 prtn += snprintf(buffer + prtn, frac_bits, "%ld",
1601                                  frac_val * temp_mult / mult);
1602
1603                 prtn--;
1604                 while(buffer[prtn] < '1' || buffer[prtn] > '9') {
1605                         prtn--;
1606                         if (buffer[prtn] == '.') {
1607                                 prtn--;
1608                                 break;
1609                         }
1610                 }
1611                 prtn++;
1612         }
1613         buffer[prtn++] ='\n';
1614         return prtn;
1615 }
1616
1617 int lprocfs_seq_read_frac_helper(struct seq_file *m, long val, int mult)
1618 {
1619         long decimal_val, frac_val;
1620
1621         decimal_val = val / mult;
1622         seq_printf(m, "%ld", decimal_val);
1623         frac_val = val % mult;
1624
1625         if (frac_val > 0) {
1626                 frac_val *= 100;
1627                 frac_val /= mult;
1628         }
1629         if (frac_val > 0) {
1630                 /* Three cases: x0, xx, 0x */
1631                 if ((frac_val % 10) != 0)
1632                         seq_printf(m, ".%ld", frac_val);
1633                 else
1634                         seq_printf(m, ".%ld", frac_val / 10);
1635         }
1636
1637         seq_printf(m, "\n");
1638         return 0;
1639 }
1640 EXPORT_SYMBOL(lprocfs_seq_read_frac_helper);
1641
1642 int lprocfs_write_u64_helper(const char __user *buffer, unsigned long count,
1643                              __u64 *val)
1644 {
1645         return lprocfs_write_frac_u64_helper(buffer, count, val, 1);
1646 }
1647 EXPORT_SYMBOL(lprocfs_write_u64_helper);
1648
1649 int lprocfs_write_frac_u64_helper(const char __user *buffer,
1650                                   unsigned long count,
1651                                   __u64 *val, int mult)
1652 {
1653         char kernbuf[22], *end, *pbuf;
1654         __u64 whole, frac = 0, units;
1655         unsigned frac_d = 1;
1656
1657         if (count > (sizeof(kernbuf) - 1))
1658                 return -EINVAL;
1659
1660         if (copy_from_user(kernbuf, buffer, count))
1661                 return -EFAULT;
1662
1663         kernbuf[count] = '\0';
1664         pbuf = kernbuf;
1665         if (*pbuf == '-') {
1666                 mult = -mult;
1667                 pbuf++;
1668         }
1669
1670         whole = simple_strtoull(pbuf, &end, 10);
1671         if (pbuf == end)
1672                 return -EINVAL;
1673
1674         if (end != NULL && *end == '.') {
1675                 int i;
1676                 pbuf = end + 1;
1677
1678                 /* need to limit frac_d to a __u32 */
1679                 if (strlen(pbuf) > 10)
1680                         pbuf[10] = '\0';
1681
1682                 frac = simple_strtoull(pbuf, &end, 10);
1683                 /* count decimal places */
1684                 for (i = 0; i < (end - pbuf); i++)
1685                         frac_d *= 10;
1686         }
1687
1688         units = 1;
1689         if (end != NULL) {
1690                 switch (*end) {
1691                 case 'p': case 'P':
1692                         units <<= 10;
1693                 case 't': case 'T':
1694                         units <<= 10;
1695                 case 'g': case 'G':
1696                         units <<= 10;
1697                 case 'm': case 'M':
1698                         units <<= 10;
1699                 case 'k': case 'K':
1700                         units <<= 10;
1701                 }
1702         }
1703         /* Specified units override the multiplier */
1704         if (units > 1)
1705                 mult = mult < 0 ? -units : units;
1706
1707         frac *= mult;
1708         do_div(frac, frac_d);
1709         *val = whole * mult + frac;
1710         return 0;
1711 }
1712 EXPORT_SYMBOL(lprocfs_write_frac_u64_helper);
1713
1714 static char *lprocfs_strnstr(const char *s1, const char *s2, size_t len)
1715 {
1716         size_t l2;
1717
1718         l2 = strlen(s2);
1719         if (!l2)
1720                 return (char *)s1;
1721         while (len >= l2) {
1722                 len--;
1723                 if (!memcmp(s1, s2, l2))
1724                         return (char *)s1;
1725                 s1++;
1726         }
1727         return NULL;
1728 }
1729
1730 /**
1731  * Find the string \a name in the input \a buffer, and return a pointer to the
1732  * value immediately following \a name, reducing \a count appropriately.
1733  * If \a name is not found the original \a buffer is returned.
1734  */
1735 char *lprocfs_find_named_value(const char *buffer, const char *name,
1736                                 size_t *count)
1737 {
1738         char *val;
1739         size_t buflen = *count;
1740
1741         /* there is no strnstr() in rhel5 and ubuntu kernels */
1742         val = lprocfs_strnstr(buffer, name, buflen);
1743         if (val == NULL)
1744                 return (char *)buffer;
1745
1746         val += strlen(name);                             /* skip prefix */
1747         while (val < buffer + buflen && isspace(*val)) /* skip separator */
1748                 val++;
1749
1750         *count = 0;
1751         while (val < buffer + buflen && isalnum(*val)) {
1752                 ++*count;
1753                 ++val;
1754         }
1755
1756         return val - *count;
1757 }
1758 EXPORT_SYMBOL(lprocfs_find_named_value);
1759
1760 int lprocfs_seq_create(struct proc_dir_entry *parent,
1761                        const char *name,
1762                        mode_t mode,
1763                        const struct file_operations *seq_fops,
1764                        void *data)
1765 {
1766         struct proc_dir_entry *entry;
1767         ENTRY;
1768
1769         /* Disallow secretly (un)writable entries. */
1770         LASSERT((seq_fops->write == NULL) == ((mode & 0222) == 0));
1771
1772         entry = proc_create_data(name, mode, parent, seq_fops, data);
1773
1774         if (entry == NULL)
1775                 RETURN(-ENOMEM);
1776
1777         RETURN(0);
1778 }
1779 EXPORT_SYMBOL(lprocfs_seq_create);
1780
1781 int lprocfs_obd_seq_create(struct obd_device *dev,
1782                            const char *name,
1783                            mode_t mode,
1784                            const struct file_operations *seq_fops,
1785                            void *data)
1786 {
1787         return (lprocfs_seq_create(dev->obd_proc_entry, name,
1788                                    mode, seq_fops, data));
1789 }
1790 EXPORT_SYMBOL(lprocfs_obd_seq_create);
1791
1792 void lprocfs_oh_tally(struct obd_histogram *oh, unsigned int value)
1793 {
1794         if (value >= OBD_HIST_MAX)
1795                 value = OBD_HIST_MAX - 1;
1796
1797         spin_lock(&oh->oh_lock);
1798         oh->oh_buckets[value]++;
1799         spin_unlock(&oh->oh_lock);
1800 }
1801 EXPORT_SYMBOL(lprocfs_oh_tally);
1802
1803 void lprocfs_oh_tally_log2(struct obd_histogram *oh, unsigned int value)
1804 {
1805         unsigned int val = 0;
1806
1807         if (likely(value != 0))
1808                 val = min(fls(value - 1), OBD_HIST_MAX);
1809
1810         lprocfs_oh_tally(oh, val);
1811 }
1812 EXPORT_SYMBOL(lprocfs_oh_tally_log2);
1813
1814 unsigned long lprocfs_oh_sum(struct obd_histogram *oh)
1815 {
1816         unsigned long ret = 0;
1817         int i;
1818
1819         for (i = 0; i < OBD_HIST_MAX; i++)
1820                 ret +=  oh->oh_buckets[i];
1821         return ret;
1822 }
1823 EXPORT_SYMBOL(lprocfs_oh_sum);
1824
1825 void lprocfs_oh_clear(struct obd_histogram *oh)
1826 {
1827         spin_lock(&oh->oh_lock);
1828         memset(oh->oh_buckets, 0, sizeof(oh->oh_buckets));
1829         spin_unlock(&oh->oh_lock);
1830 }
1831 EXPORT_SYMBOL(lprocfs_oh_clear);
1832
1833 int lprocfs_obd_rd_max_pages_per_rpc(char *page, char **start, off_t off,
1834                                      int count, int *eof, void *data)
1835 {
1836         struct obd_device *dev = data;
1837         struct client_obd *cli = &dev->u.cli;
1838         int rc;
1839
1840         spin_lock(&cli->cl_loi_list_lock);
1841         rc = snprintf(page, count, "%d\n", cli->cl_max_pages_per_rpc);
1842         spin_unlock(&cli->cl_loi_list_lock);
1843
1844         return rc;
1845 }
1846
1847 int lprocfs_obd_max_pages_per_rpc_seq_show(struct seq_file *m, void *data)
1848 {
1849         struct obd_device *dev = data;
1850         struct client_obd *cli = &dev->u.cli;
1851         int rc;
1852
1853         spin_lock(&cli->cl_loi_list_lock);
1854         rc = seq_printf(m, "%d\n", cli->cl_max_pages_per_rpc);
1855         spin_unlock(&cli->cl_loi_list_lock);
1856         return rc;
1857 }
1858 EXPORT_SYMBOL(lprocfs_obd_max_pages_per_rpc_seq_show);
1859
1860 int lprocfs_wr_root_squash(const char __user *buffer, unsigned long count,
1861                            struct root_squash_info *squash, char *name)
1862 {
1863         int rc;
1864         char kernbuf[64], *tmp, *errmsg;
1865         unsigned long uid, gid;
1866         ENTRY;
1867
1868         if (count >= sizeof(kernbuf)) {
1869                 errmsg = "string too long";
1870                 GOTO(failed_noprint, rc = -EINVAL);
1871         }
1872         if (copy_from_user(kernbuf, buffer, count)) {
1873                 errmsg = "bad address";
1874                 GOTO(failed_noprint, rc = -EFAULT);
1875         }
1876         kernbuf[count] = '\0';
1877
1878         /* look for uid gid separator */
1879         tmp = strchr(kernbuf, ':');
1880         if (tmp == NULL) {
1881                 errmsg = "needs uid:gid format";
1882                 GOTO(failed, rc = -EINVAL);
1883         }
1884         *tmp = '\0';
1885         tmp++;
1886
1887         /* parse uid */
1888         if (kstrtoul(kernbuf, 0, &uid) != 0) {
1889                 errmsg = "bad uid";
1890                 GOTO(failed, rc = -EINVAL);
1891         }
1892
1893         /* parse gid */
1894         if (kstrtoul(tmp, 0, &gid) != 0) {
1895                 errmsg = "bad gid";
1896                 GOTO(failed, rc = -EINVAL);
1897         }
1898
1899         squash->rsi_uid = uid;
1900         squash->rsi_gid = gid;
1901
1902         LCONSOLE_INFO("%s: root_squash is set to %u:%u\n",
1903                       name, squash->rsi_uid, squash->rsi_gid);
1904         RETURN(count);
1905
1906 failed:
1907         if (tmp != NULL) {
1908                 tmp--;
1909                 *tmp = ':';
1910         }
1911         CWARN("%s: failed to set root_squash to \"%s\", %s, rc = %d\n",
1912               name, kernbuf, errmsg, rc);
1913         RETURN(rc);
1914 failed_noprint:
1915         CWARN("%s: failed to set root_squash due to %s, rc = %d\n",
1916               name, errmsg, rc);
1917         RETURN(rc);
1918 }
1919 EXPORT_SYMBOL(lprocfs_wr_root_squash);
1920
1921
1922 int lprocfs_wr_nosquash_nids(const char __user *buffer, unsigned long count,
1923                              struct root_squash_info *squash, char *name)
1924 {
1925         int rc;
1926         char *kernbuf = NULL;
1927         char *errmsg;
1928         struct list_head tmp;
1929         int len = count;
1930         ENTRY;
1931
1932         if (count > 4096) {
1933                 errmsg = "string too long";
1934                 GOTO(failed, rc = -EINVAL);
1935         }
1936
1937         OBD_ALLOC(kernbuf, count + 1);
1938         if (kernbuf == NULL) {
1939                 errmsg = "no memory";
1940                 GOTO(failed, rc = -ENOMEM);
1941         }
1942         if (copy_from_user(kernbuf, buffer, count)) {
1943                 errmsg = "bad address";
1944                 GOTO(failed, rc = -EFAULT);
1945         }
1946         kernbuf[count] = '\0';
1947
1948         if (count > 0 && kernbuf[count - 1] == '\n')
1949                 len = count - 1;
1950
1951         if ((len == 4 && strncmp(kernbuf, "NONE", len) == 0) ||
1952             (len == 5 && strncmp(kernbuf, "clear", len) == 0)) {
1953                 /* empty string is special case */
1954                 down_write(&squash->rsi_sem);
1955                 if (!list_empty(&squash->rsi_nosquash_nids))
1956                         cfs_free_nidlist(&squash->rsi_nosquash_nids);
1957                 up_write(&squash->rsi_sem);
1958                 LCONSOLE_INFO("%s: nosquash_nids is cleared\n", name);
1959                 OBD_FREE(kernbuf, count + 1);
1960                 RETURN(count);
1961         }
1962
1963         INIT_LIST_HEAD(&tmp);
1964         if (cfs_parse_nidlist(kernbuf, count, &tmp) <= 0) {
1965                 errmsg = "can't parse";
1966                 GOTO(failed, rc = -EINVAL);
1967         }
1968         LCONSOLE_INFO("%s: nosquash_nids set to %s\n",
1969                       name, kernbuf);
1970         OBD_FREE(kernbuf, count + 1);
1971         kernbuf = NULL;
1972
1973         down_write(&squash->rsi_sem);
1974         if (!list_empty(&squash->rsi_nosquash_nids))
1975                 cfs_free_nidlist(&squash->rsi_nosquash_nids);
1976         list_splice(&tmp, &squash->rsi_nosquash_nids);
1977         up_write(&squash->rsi_sem);
1978
1979         RETURN(count);
1980
1981 failed:
1982         if (kernbuf) {
1983                 CWARN("%s: failed to set nosquash_nids to \"%s\", %s rc = %d\n",
1984                       name, kernbuf, errmsg, rc);
1985                 OBD_FREE(kernbuf, count + 1);
1986         } else {
1987                 CWARN("%s: failed to set nosquash_nids due to %s rc = %d\n",
1988                       name, errmsg, rc);
1989         }
1990         RETURN(rc);
1991 }
1992 EXPORT_SYMBOL(lprocfs_wr_nosquash_nids);
1993
1994 #endif /* CONFIG_PROC_FS*/