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, 2013, 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 #ifndef __KERNEL__
  44 #include <liblustre.h>
  45 #endif
  46
  47 #include <obd_class.h>
  48 #include <lprocfs_status.h>
  49 #include <lustre/lustre_idl.h>
  50
  51 #if defined(LPROCFS)
  52
  53 static int lprocfs_no_percpu_stats = 0;
  54 CFS_MODULE_PARM(lprocfs_no_percpu_stats, "i", int, 0644,
  55                 "Do not alloc percpu data for lprocfs stats");
  56
  57 #define MAX_STRING_SIZE 128
  58
  59 int lprocfs_single_release(struct inode *inode, struct file *file)
  60 {
  61         return single_release(inode, file);
  62 }
  63 EXPORT_SYMBOL(lprocfs_single_release);
  64
  65 int lprocfs_seq_release(struct inode *inode, struct file *file)
  66 {
  67         return seq_release(inode, file);
  68 }
  69 EXPORT_SYMBOL(lprocfs_seq_release);
  70
  71 #ifndef HAVE_ONLY_PROCFS_SEQ
  72 /* for b=10866, global variable */
  73 DECLARE_RWSEM(_lprocfs_lock);
  74 EXPORT_SYMBOL(_lprocfs_lock);
  75
  76 static struct proc_dir_entry *__lprocfs_srch(struct proc_dir_entry *head,
  77                                              const char *name)
  78 {
  79         struct proc_dir_entry *temp;
  80
  81         if (head == NULL)
  82                 return NULL;
  83
  84         temp = head->subdir;
  85         while (temp != NULL) {
  86                 if (strcmp(temp->name, name) == 0) {
  87                         return temp;
  88                 }
  89
  90                 temp = temp->next;
  91         }
  92         return NULL;
  93 }
  94
  95 struct proc_dir_entry *lprocfs_srch(struct proc_dir_entry *head,
  96                                     const char *name)
  97 {
  98         struct proc_dir_entry *temp;
  99
 100         LPROCFS_SRCH_ENTRY();
 101         temp = __lprocfs_srch(head, name);
 102         LPROCFS_SRCH_EXIT();
 103         return temp;
 104 }
 105 EXPORT_SYMBOL(lprocfs_srch);
 106
 107 /* lprocfs API calls */
 108
 109 /* Function that emulates snprintf but also has the side effect of advancing
 110    the page pointer for the next write into the buffer, incrementing the total
 111    length written to the buffer, and decrementing the size left in the
 112    buffer. */
 113 #ifdef HAVE_SERVER_SUPPORT
 114 static int lprocfs_obd_snprintf(char **page, int end, int *len,
 115                                 const char *format, ...)
 116 {
 117         va_list list;
 118         int n;
 119
 120         if (*len >= end)
 121                 return 0;
 122
 123         va_start(list, format);
 124         n = vsnprintf(*page, end - *len, format, list);
 125         va_end(list);
 126
 127         *page += n; *len += n;
 128         return n;
 129 }
 130 #endif  /* HAVE_SERVER_SUPPORT */
 131 #endif  /* HAVE_ONLY_PROCFS_SEQ */
 132
 133 cfs_proc_dir_entry_t *lprocfs_add_simple(struct proc_dir_entry *root,
 134                                          char *name,
 135 #ifndef HAVE_ONLY_PROCFS_SEQ
 136                                          read_proc_t *read_proc,
 137                                          write_proc_t *write_proc,
 138 #endif
 139                                          void *data,
 140                                          struct file_operations *fops)
 141 {
 142         cfs_proc_dir_entry_t *proc;
 143         mode_t mode = 0;
 144
 145         if (root == NULL || name == NULL)
 146                 return ERR_PTR(-EINVAL);
 147
 148         if (!fops) {
 149 #ifndef HAVE_ONLY_PROCFS_SEQ
 150                 if (read_proc)
 151                         mode = 0444;
 152                 if (write_proc)
 153                         mode |= 0200;
 154
 155                 LPROCFS_WRITE_ENTRY();
 156                 proc = create_proc_entry(name, mode, root);
 157                 if (!proc) {
 158                         CERROR("LprocFS: No memory to create /proc entry %s", name);
 159                         LPROCFS_WRITE_EXIT();
 160                         return ERR_PTR(-ENOMEM);
 161                 }
 162                 proc->read_proc = read_proc;
 163                 proc->write_proc = write_proc;
 164                 proc->data = data;
 165                 LPROCFS_WRITE_EXIT();
 166 #else
 167                 return ERR_PTR(-EINVAL);
 168 #endif
 169         } else {
 170                 if (fops->read)
 171                         mode = 0444;
 172                 if (fops->write)
 173                         mode |= 0200;
 174                 proc = proc_create_data(name, mode, root, fops, data);
 175                 if (!proc) {
 176                         CERROR("LprocFS: No memory to create /proc entry %s",
 177                                name);
 178                         return ERR_PTR(-ENOMEM);
 179                 }
 180         }
 181         return proc;
 182 }
 183 EXPORT_SYMBOL(lprocfs_add_simple);
 184
 185 struct proc_dir_entry *lprocfs_add_symlink(const char *name,
 186                         struct proc_dir_entry *parent, const char *format, ...)
 187 {
 188         struct proc_dir_entry *entry;
 189         char *dest;
 190         va_list ap;
 191
 192         if (parent == NULL || format == NULL)
 193                 return NULL;
 194
 195         OBD_ALLOC_WAIT(dest, MAX_STRING_SIZE + 1);
 196         if (dest == NULL)
 197                 return NULL;
 198
 199         va_start(ap, format);
 200         vsnprintf(dest, MAX_STRING_SIZE, format, ap);
 201         va_end(ap);
 202
 203         entry = proc_symlink(name, parent, dest);
 204         if (entry == NULL)
 205                 CERROR("LprocFS: Could not create symbolic link from %s to %s",
 206                         name, dest);
 207
 208         OBD_FREE(dest, MAX_STRING_SIZE + 1);
 209         return entry;
 210 }
 211 EXPORT_SYMBOL(lprocfs_add_symlink);
 212
 213 #ifndef HAVE_ONLY_PROCFS_SEQ
 214 static ssize_t lprocfs_fops_read(struct file *f, char __user *buf,
 215                                  size_t size, loff_t *ppos)
 216 {
 217         struct proc_dir_entry *dp = PDE(f->f_dentry->d_inode);
 218         char *page, *start = NULL;
 219         int rc = 0, eof = 1, count;
 220
 221         if (*ppos >= PAGE_CACHE_SIZE)
 222                 return 0;
 223
 224         page = (char *)__get_free_page(GFP_KERNEL);
 225         if (page == NULL)
 226                 return -ENOMEM;
 227
 228         if (LPROCFS_ENTRY_CHECK(dp)) {
 229                 rc = -ENOENT;
 230                 goto out;
 231         }
 232
 233         OBD_FAIL_TIMEOUT(OBD_FAIL_LPROC_REMOVE, 10);
 234         if (dp->read_proc)
 235                 rc = dp->read_proc(page, &start, *ppos, PAGE_CACHE_SIZE,
 236                                    &eof, dp->data);
 237         if (rc <= 0)
 238                 goto out;
 239
 240         /* for lustre proc read, the read count must be less than PAGE_SIZE */
 241         LASSERT(eof == 1);
 242
 243         if (start == NULL) {
 244                 rc -= *ppos;
 245                 if (rc < 0)
 246                         rc = 0;
 247                 if (rc == 0)
 248                         goto out;
 249                 start = page + *ppos;
 250         } else if (start < page) {
 251                 start = page;
 252         }
 253
 254         count = (rc < size) ? rc : size;
 255         if (copy_to_user(buf, start, count)) {
 256                 rc = -EFAULT;
 257                 goto out;
 258         }
 259         *ppos += count;
 260
 261 out:
 262         free_page((unsigned long)page);
 263         return rc;
 264 }
 265
 266 static ssize_t lprocfs_fops_write(struct file *f, const char __user *buf,
 267                                   size_t size, loff_t *ppos)
 268 {
 269         struct proc_dir_entry *dp = PDE(f->f_dentry->d_inode);
 270         int rc = -EIO;
 271
 272         if (LPROCFS_ENTRY_CHECK(dp))
 273                 return -ENOENT;
 274         if (dp->write_proc)
 275                 rc = dp->write_proc(f, buf, size, dp->data);
 276         return rc;
 277 }
 278
 279 static struct file_operations lprocfs_generic_fops = {
 280         .owner = THIS_MODULE,
 281         .read = lprocfs_fops_read,
 282         .write = lprocfs_fops_write,
 283 };
 284 #else
 285 static struct file_operations lprocfs_generic_fops = { };
 286 #endif
 287
 288 #ifdef HAVE_SERVER_SUPPORT
 289 int lprocfs_evict_client_open(struct inode *inode, struct file *f)
 290 {
 291         struct obd_device *obd = PDE_DATA(f->f_dentry->d_inode);
 292
 293         atomic_inc(&obd->obd_evict_inprogress);
 294         return 0;
 295 }
 296
 297 int lprocfs_evict_client_release(struct inode *inode, struct file *f)
 298 {
 299         struct obd_device *obd = PDE_DATA(f->f_dentry->d_inode);
 300
 301         atomic_dec(&obd->obd_evict_inprogress);
 302         wake_up(&obd->obd_evict_inprogress_waitq);
 303
 304         return 0;
 305 }
 306
 307 #define BUFLEN (UUID_MAX + 5)
 308
 309 #ifndef HAVE_ONLY_PROCFS_SEQ
 310 int lprocfs_wr_evict_client(struct file *file, const char *buffer,
 311                             unsigned long count, void *data)
 312 {
 313         struct obd_device *obd = data;
 314         char              *kbuf;
 315         char              *tmpbuf;
 316
 317         OBD_ALLOC(kbuf, BUFLEN);
 318         if (kbuf == NULL)
 319                 return -ENOMEM;
 320
 321         /*
 322          * OBD_ALLOC() will zero kbuf, but we only copy BUFLEN - 1
 323          * bytes into kbuf, to ensure that the string is NUL-terminated.
 324          * UUID_MAX should include a trailing NUL already.
 325          */
 326         if (copy_from_user(kbuf, buffer,
 327                            min_t(unsigned long, BUFLEN - 1, count))) {
 328                 count = -EFAULT;
 329                 goto out;
 330         }
 331         tmpbuf = cfs_firststr(kbuf, min_t(unsigned long, BUFLEN - 1, count));
 332         class_incref(obd, __FUNCTION__, current);
 333
 334         if (strncmp(tmpbuf, "nid:", 4) == 0)
 335                 obd_export_evict_by_nid(obd, tmpbuf + 4);
 336         else if (strncmp(tmpbuf, "uuid:", 5) == 0)
 337                 obd_export_evict_by_uuid(obd, tmpbuf + 5);
 338         else
 339                 obd_export_evict_by_uuid(obd, tmpbuf);
 340
 341         class_decref(obd, __FUNCTION__, current);
 342 out:
 343         OBD_FREE(kbuf, BUFLEN);
 344         return count;
 345 }
 346 EXPORT_SYMBOL(lprocfs_wr_evict_client);
 347 #endif
 348
 349 ssize_t
 350 lprocfs_evict_client_seq_write(struct file *file, const char *buffer,
 351                                size_t count, loff_t *off)
 352 {
 353         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
 354         char *tmpbuf, *kbuf;
 355
 356         OBD_ALLOC(kbuf, BUFLEN);
 357         if (kbuf == NULL)
 358                 return -ENOMEM;
 359
 360         /*
 361          * OBD_ALLOC() will zero kbuf, but we only copy BUFLEN - 1
 362          * bytes into kbuf, to ensure that the string is NUL-terminated.
 363          * UUID_MAX should include a trailing NUL already.
 364          */
 365         if (copy_from_user(kbuf, buffer,
 366                            min_t(unsigned long, BUFLEN - 1, count))) {
 367                 count = -EFAULT;
 368                 goto out;
 369         }
 370         tmpbuf = cfs_firststr(kbuf, min_t(unsigned long, BUFLEN - 1, count));
 371         class_incref(obd, __FUNCTION__, current);
 372
 373         if (strncmp(tmpbuf, "nid:", 4) == 0)
 374                 obd_export_evict_by_nid(obd, tmpbuf + 4);
 375         else if (strncmp(tmpbuf, "uuid:", 5) == 0)
 376                 obd_export_evict_by_uuid(obd, tmpbuf + 5);
 377         else
 378                 obd_export_evict_by_uuid(obd, tmpbuf);
 379
 380         class_decref(obd, __FUNCTION__, current);
 381
 382 out:
 383         OBD_FREE(kbuf, BUFLEN);
 384         return count;
 385 }
 386 EXPORT_SYMBOL(lprocfs_evict_client_seq_write);
 387
 388 #undef BUFLEN
 389
 390 struct file_operations lprocfs_evict_client_fops = {
 391         .owner = THIS_MODULE,
 392         .read = lprocfs_fops_read,
 393         .write = lprocfs_fops_write,
 394         .open = lprocfs_evict_client_open,
 395         .release = lprocfs_evict_client_release,
 396 };
 397 EXPORT_SYMBOL(lprocfs_evict_client_fops);
 398 #endif
 399
 400 #ifndef HAVE_ONLY_PROCFS_SEQ
 401 static int __lprocfs_add_vars(struct proc_dir_entry *root,
 402                               struct lprocfs_vars *list,
 403                               void *data)
 404 {
 405         int rc = 0;
 406
 407         if (root == NULL || list == NULL)
 408                 return -EINVAL;
 409
 410         while (list->name != NULL) {
 411                 struct proc_dir_entry *cur_root, *proc;
 412                 char *pathcopy, *cur, *next, pathbuf[64];
 413                 int pathsize = strlen(list->name) + 1;
 414
 415                 proc = NULL;
 416                 cur_root = root;
 417
 418                 /* need copy of path for strsep */
 419                 if (strlen(list->name) > sizeof(pathbuf) - 1) {
 420                         OBD_ALLOC(pathcopy, pathsize);
 421                         if (pathcopy == NULL)
 422                                 GOTO(out, rc = -ENOMEM);
 423                 } else {
 424                         pathcopy = pathbuf;
 425                 }
 426
 427                 next = pathcopy;
 428                 strcpy(pathcopy, list->name);
 429
 430                 while (cur_root != NULL && (cur = strsep(&next, "/"))) {
 431                         if (*cur =='\0') /* skip double/trailing "/" */
 432                                 continue;
 433
 434                         proc = __lprocfs_srch(cur_root, cur);
 435                         CDEBUG(D_OTHER, "cur_root=%s, cur=%s, next=%s, (%s)\n",
 436                                cur_root->name, cur, next,
 437                                (proc ? "exists" : "new"));
 438                         if (next != NULL) {
 439                                 cur_root = (proc ? proc :
 440                                             proc_mkdir(cur, cur_root));
 441                         } else if (proc == NULL) {
 442                                 mode_t mode = 0;
 443                                 if (list->proc_mode != 0000) {
 444                                         mode = list->proc_mode;
 445                                 } else {
 446                                         if (list->read_fptr)
 447                                                 mode = 0444;
 448                                         if (list->write_fptr)
 449                                                 mode |= 0200;
 450                                 }
 451                                 proc = create_proc_entry(cur, mode, cur_root);
 452                         }
 453                 }
 454
 455                 if (pathcopy != pathbuf)
 456                         OBD_FREE(pathcopy, pathsize);
 457
 458                 if (cur_root == NULL || proc == NULL) {
 459                         CERROR("LprocFS: No memory to create /proc entry %s",
 460                                list->name);
 461                         GOTO(out, rc = -ENOMEM);
 462                 }
 463
 464                 if (list->fops)
 465                         proc->proc_fops = list->fops;
 466                 else
 467                         proc->proc_fops = &lprocfs_generic_fops;
 468                 proc->read_proc = list->read_fptr;
 469                 proc->write_proc = list->write_fptr;
 470                 proc->data = (list->data ? list->data : data);
 471                 list++;
 472         }
 473 out:
 474         return rc;
 475 }
 476
 477 int lprocfs_add_vars(struct proc_dir_entry *root, struct lprocfs_vars *list,
 478                      void *data)
 479 {
 480         int rc = 0;
 481
 482         LPROCFS_WRITE_ENTRY();
 483         rc = __lprocfs_add_vars(root, list, data);
 484         LPROCFS_WRITE_EXIT();
 485
 486         return rc;
 487 }
 488 EXPORT_SYMBOL(lprocfs_add_vars);
 489
 490 #endif
 491
 492 /**
 493  * Add /proc entries.
 494  *
 495  * \param root [in]  The parent proc entry on which new entry will be added.
 496  * \param list [in]  Array of proc entries to be added.
 497  * \param data [in]  The argument to be passed when entries read/write routines
 498  *                   are called through /proc file.
 499  *
 500  * \retval 0   on success
 501  *         < 0 on error
 502  */
 503 int
 504 lprocfs_seq_add_vars(struct proc_dir_entry *root, struct lprocfs_seq_vars *list,
 505                      void *data)
 506 {
 507         if (root == NULL || list == NULL)
 508                 return -EINVAL;
 509
 510         while (list->name != NULL) {
 511                 struct proc_dir_entry *proc;
 512                 mode_t mode = 0;
 513
 514                 if (list->proc_mode != 0000) {
 515                         mode = list->proc_mode;
 516                 } else if (list->fops) {
 517                         if (list->fops->read)
 518                                 mode = 0444;
 519                         if (list->fops->write)
 520                                 mode |= 0200;
 521                 }
 522                 proc = proc_create_data(list->name, mode, root,
 523                                         list->fops ?: &lprocfs_generic_fops,
 524                                         list->data ?: data);
 525                 if (proc == NULL)
 526                         return -ENOMEM;
 527                 list++;
 528         }
 529         return 0;
 530 }
 531 EXPORT_SYMBOL(lprocfs_seq_add_vars);
 532
 533 #ifndef HAVE_ONLY_PROCFS_SEQ
 534 void lprocfs_remove_nolock(struct proc_dir_entry **proot)
 535 {
 536         struct proc_dir_entry *root = *proot;
 537         struct proc_dir_entry *temp = root;
 538         struct proc_dir_entry *rm_entry;
 539         struct proc_dir_entry *parent;
 540
 541         *proot = NULL;
 542         if (root == NULL || IS_ERR(root))
 543                 return;
 544
 545         parent = root->parent;
 546         LASSERT(parent != NULL);
 547
 548         while (1) {
 549                 while (temp->subdir != NULL)
 550                         temp = temp->subdir;
 551
 552                 rm_entry = temp;
 553                 temp = temp->parent;
 554
 555                 /* Memory corruption once caused this to fail, and
 556                    without this LASSERT we would loop here forever. */
 557                 LASSERTF(strlen(rm_entry->name) == rm_entry->namelen,
 558                          "0x%p  %s/%s len %d\n", rm_entry, temp->name,
 559                          rm_entry->name, (int)strlen(rm_entry->name));
 560
 561                 remove_proc_entry(rm_entry->name, temp);
 562                 if (temp == parent)
 563                         break;
 564         }
 565 }
 566 #endif
 567
 568 void lprocfs_remove(struct proc_dir_entry **rooth)
 569 {
 570 #ifndef HAVE_ONLY_PROCFS_SEQ
 571         LPROCFS_WRITE_ENTRY(); /* search vs remove race */
 572         lprocfs_remove_nolock(rooth);
 573         LPROCFS_WRITE_EXIT();
 574 #else
 575         proc_remove(*rooth);
 576         *rooth = NULL;
 577 #endif
 578 }
 579 EXPORT_SYMBOL(lprocfs_remove);
 580
 581 void lprocfs_remove_proc_entry(const char *name, struct proc_dir_entry *parent)
 582 {
 583         LASSERT(parent != NULL);
 584         remove_proc_entry(name, parent);
 585 }
 586 EXPORT_SYMBOL(lprocfs_remove_proc_entry);
 587
 588 #ifndef HAVE_ONLY_PROCFS_SEQ
 589 void lprocfs_try_remove_proc_entry(const char *name,
 590                                    struct proc_dir_entry *parent)
 591 {
 592         struct proc_dir_entry    *t = NULL;
 593         struct proc_dir_entry   **p;
 594         int                       len, busy = 0;
 595
 596         LASSERT(parent != NULL);
 597         len = strlen(name);
 598
 599         LPROCFS_WRITE_ENTRY();
 600
 601         /* lookup target name */
 602         for (p = &parent->subdir; *p; p = &(*p)->next) {
 603                 if ((*p)->namelen != len)
 604                         continue;
 605                 if (memcmp(name, (*p)->name, len))
 606                         continue;
 607                 t = *p;
 608                 break;
 609         }
 610
 611         if (t) {
 612                 /* verify it's empty: do not count "num_refs" */
 613                 for (p = &t->subdir; *p; p = &(*p)->next) {
 614                         if ((*p)->namelen != strlen("num_refs")) {
 615                                 busy = 1;
 616                                 break;
 617                         }
 618                         if (memcmp("num_refs", (*p)->name,
 619                                    strlen("num_refs"))) {
 620                                 busy = 1;
 621                                 break;
 622                         }
 623                 }
 624         }
 625
 626         if (busy == 0)
 627                 lprocfs_remove_nolock(&t);
 628
 629         LPROCFS_WRITE_EXIT();
 630
 631         return;
 632 }
 633 EXPORT_SYMBOL(lprocfs_try_remove_proc_entry);
 634
 635 struct proc_dir_entry *lprocfs_register(const char *name,
 636                                         struct proc_dir_entry *parent,
 637                                         struct lprocfs_vars *list, void *data)
 638 {
 639         struct proc_dir_entry *entry;
 640         int rc;
 641
 642         LPROCFS_WRITE_ENTRY();
 643         entry = __lprocfs_srch(parent, name);
 644         if (entry != NULL) {
 645                 CERROR("entry '%s' already registered\n", name);
 646                 GOTO(out, entry = ERR_PTR(-EALREADY));
 647         }
 648
 649         entry = proc_mkdir(name, parent);
 650         if (entry == NULL)
 651                 GOTO(out, entry = ERR_PTR(-ENOMEM));
 652
 653         if (list != NULL) {
 654                 rc = __lprocfs_add_vars(entry, list, data);
 655                 if (rc != 0) {
 656                         lprocfs_remove_nolock(&entry);
 657                         GOTO(out, entry = ERR_PTR(rc));
 658                 }
 659         }
 660 out:
 661         LPROCFS_WRITE_EXIT();
 662         return entry;
 663 }
 664 EXPORT_SYMBOL(lprocfs_register);
 665 #endif
 666
 667 struct proc_dir_entry *
 668 lprocfs_seq_register(const char *name, struct proc_dir_entry *parent,
 669                      struct lprocfs_seq_vars *list, void *data)
 670 {
 671         struct proc_dir_entry *newchild;
 672
 673         newchild = proc_mkdir(name, parent);
 674         if (newchild != NULL && list != NULL) {
 675                 int rc = lprocfs_seq_add_vars(newchild, list, data);
 676                 if (rc) {
 677                         lprocfs_remove(&newchild);
 678                         return ERR_PTR(rc);
 679                 }
 680         }
 681         return newchild;
 682 }
 683 EXPORT_SYMBOL(lprocfs_seq_register);
 684
 685 /* Generic callbacks */
 686 int lprocfs_uint_seq_show(struct seq_file *m, void *data)
 687 {
 688         return seq_printf(m, "%u\n", *(unsigned int *)data);
 689 }
 690 EXPORT_SYMBOL(lprocfs_uint_seq_show);
 691
 692 int lprocfs_wr_uint(struct file *file, const char *buffer,
 693                     unsigned long count, void *data)
 694 {
 695         unsigned *p = data;
 696         char dummy[MAX_STRING_SIZE + 1], *end;
 697         unsigned long tmp;
 698
 699         dummy[MAX_STRING_SIZE] = '\0';
 700         if (copy_from_user(dummy, buffer, MAX_STRING_SIZE))
 701                 return -EFAULT;
 702
 703         tmp = simple_strtoul(dummy, &end, 0);
 704         if (dummy == end)
 705                 return -EINVAL;
 706
 707         *p = (unsigned int)tmp;
 708         return count;
 709 }
 710 EXPORT_SYMBOL(lprocfs_wr_uint);
 711
 712 ssize_t lprocfs_uint_seq_write(struct file *file, const char *buffer,
 713                                size_t count, loff_t *off)
 714 {
 715         int *data = ((struct seq_file *)file->private_data)->private;
 716         int val = 0, rc;
 717
 718         rc = lprocfs_write_helper(buffer, count, &val);
 719         if (rc < 0)
 720                 return rc;
 721
 722         return lprocfs_wr_uint(file, buffer, count, data);
 723 }
 724 EXPORT_SYMBOL(lprocfs_uint_seq_write);
 725
 726 int lprocfs_u64_seq_show(struct seq_file *m, void *data)
 727 {
 728         LASSERT(data != NULL);
 729         return seq_printf(m, LPU64"\n", *(__u64 *)data);
 730 }
 731 EXPORT_SYMBOL(lprocfs_u64_seq_show);
 732
 733 int lprocfs_atomic_seq_show(struct seq_file *m, void *data)
 734 {
 735         atomic_t *atom = data;
 736         LASSERT(atom != NULL);
 737         return seq_printf(m, "%d\n", atomic_read(atom));
 738 }
 739 EXPORT_SYMBOL(lprocfs_atomic_seq_show);
 740
 741 ssize_t
 742 lprocfs_atomic_seq_write(struct file *file, const char *buffer,
 743                         size_t count, loff_t *off)
 744 {
 745         atomic_t *atm = ((struct seq_file *)file->private_data)->private;
 746         int val = 0;
 747         int rc;
 748
 749         rc = lprocfs_write_helper(buffer, count, &val);
 750         if (rc < 0)
 751                 return rc;
 752
 753         if (val <= 0)
 754                 return -ERANGE;
 755
 756         atomic_set(atm, val);
 757         return count;
 758 }
 759 EXPORT_SYMBOL(lprocfs_atomic_seq_write);
 760
 761 int lprocfs_uuid_seq_show(struct seq_file *m, void *data)
 762 {
 763         struct obd_device *obd = data;
 764
 765         LASSERT(obd != NULL);
 766         return seq_printf(m, "%s\n", obd->obd_uuid.uuid);
 767 }
 768 EXPORT_SYMBOL(lprocfs_uuid_seq_show);
 769
 770 int lprocfs_name_seq_show(struct seq_file *m, void *data)
 771 {
 772         struct obd_device *dev = data;
 773
 774         LASSERT(dev != NULL);
 775         return seq_printf(m, "%s\n", dev->obd_name);
 776 }
 777 EXPORT_SYMBOL(lprocfs_name_seq_show);
 778
 779 int lprocfs_blksize_seq_show(struct seq_file *m, void *data)
 780 {
 781         struct obd_device *obd = data;
 782         struct obd_statfs  osfs;
 783         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 784                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 785                             OBD_STATFS_NODELAY);
 786         if (!rc)
 787                 rc = seq_printf(m, "%u\n", osfs.os_bsize);
 788         return rc;
 789 }
 790 EXPORT_SYMBOL(lprocfs_blksize_seq_show);
 791
 792 int lprocfs_kbytestotal_seq_show(struct seq_file *m, void *data)
 793 {
 794         struct obd_device *obd = data;
 795         struct obd_statfs  osfs;
 796         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 797                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 798                             OBD_STATFS_NODELAY);
 799         if (!rc) {
 800                 __u32 blk_size = osfs.os_bsize >> 10;
 801                 __u64 result = osfs.os_blocks;
 802
 803                 while (blk_size >>= 1)
 804                         result <<= 1;
 805
 806                 rc = seq_printf(m, LPU64"\n", result);
 807         }
 808         return rc;
 809 }
 810 EXPORT_SYMBOL(lprocfs_kbytestotal_seq_show);
 811
 812 int lprocfs_kbytesfree_seq_show(struct seq_file *m, void *data)
 813 {
 814         struct obd_device *obd = data;
 815         struct obd_statfs  osfs;
 816         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 817                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 818                             OBD_STATFS_NODELAY);
 819         if (!rc) {
 820                 __u32 blk_size = osfs.os_bsize >> 10;
 821                 __u64 result = osfs.os_bfree;
 822
 823                 while (blk_size >>= 1)
 824                         result <<= 1;
 825
 826                 rc = seq_printf(m, LPU64"\n", result);
 827         }
 828         return rc;
 829 }
 830 EXPORT_SYMBOL(lprocfs_kbytesfree_seq_show);
 831
 832 int lprocfs_kbytesavail_seq_show(struct seq_file *m, void *data)
 833 {
 834         struct obd_device *obd = data;
 835         struct obd_statfs  osfs;
 836         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 837                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 838                             OBD_STATFS_NODELAY);
 839         if (!rc) {
 840                 __u32 blk_size = osfs.os_bsize >> 10;
 841                 __u64 result = osfs.os_bavail;
 842
 843                 while (blk_size >>= 1)
 844                         result <<= 1;
 845
 846                 rc = seq_printf(m, LPU64"\n", result);
 847         }
 848         return rc;
 849 }
 850 EXPORT_SYMBOL(lprocfs_kbytesavail_seq_show);
 851
 852 int lprocfs_filestotal_seq_show(struct seq_file *m, void *data)
 853 {
 854         struct obd_device *obd = data;
 855         struct obd_statfs  osfs;
 856         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 857                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 858                             OBD_STATFS_NODELAY);
 859         if (!rc)
 860                 rc = seq_printf(m, LPU64"\n", osfs.os_files);
 861         return rc;
 862 }
 863 EXPORT_SYMBOL(lprocfs_filestotal_seq_show);
 864
 865 int lprocfs_filesfree_seq_show(struct seq_file *m, void *data)
 866 {
 867         struct obd_device *obd = data;
 868         struct obd_statfs  osfs;
 869         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 870                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 871                             OBD_STATFS_NODELAY);
 872         if (!rc)
 873                 rc = seq_printf(m, LPU64"\n", osfs.os_ffree);
 874         return rc;
 875 }
 876 EXPORT_SYMBOL(lprocfs_filesfree_seq_show);
 877
 878 int lprocfs_server_uuid_seq_show(struct seq_file *m, void *data)
 879 {
 880         struct obd_device *obd = data;
 881         struct obd_import *imp;
 882         char *imp_state_name = NULL;
 883         int rc = 0;
 884
 885         LASSERT(obd != NULL);
 886         LPROCFS_CLIMP_CHECK(obd);
 887         imp = obd->u.cli.cl_import;
 888         imp_state_name = ptlrpc_import_state_name(imp->imp_state);
 889         rc = seq_printf(m, "%s\t%s%s\n", obd2cli_tgt(obd), imp_state_name,
 890                         imp->imp_deactive ? "\tDEACTIVATED" : "");
 891
 892         LPROCFS_CLIMP_EXIT(obd);
 893         return rc;
 894 }
 895 EXPORT_SYMBOL(lprocfs_server_uuid_seq_show);
 896
 897 int lprocfs_conn_uuid_seq_show(struct seq_file *m, void *data)
 898 {
 899         struct obd_device *obd = data;
 900         struct ptlrpc_connection *conn;
 901         int rc = 0;
 902
 903         LASSERT(obd != NULL);
 904
 905         LPROCFS_CLIMP_CHECK(obd);
 906         conn = obd->u.cli.cl_import->imp_connection;
 907         if (conn && obd->u.cli.cl_import)
 908                 rc = seq_printf(m, "%s\n", conn->c_remote_uuid.uuid);
 909         else
 910                 rc = seq_printf(m, "%s\n", "<none>");
 911
 912         LPROCFS_CLIMP_EXIT(obd);
 913         return rc;
 914 }
 915 EXPORT_SYMBOL(lprocfs_conn_uuid_seq_show);
 916
 917 /** add up per-cpu counters */
 918 void lprocfs_stats_collect(struct lprocfs_stats *stats, int idx,
 919                            struct lprocfs_counter *cnt)
 920 {
 921         unsigned int                    num_entry;
 922         struct lprocfs_counter          *percpu_cntr;
 923         int                             i;
 924         unsigned long                   flags = 0;
 925
 926         memset(cnt, 0, sizeof(*cnt));
 927
 928         if (stats == NULL) {
 929                 /* set count to 1 to avoid divide-by-zero errs in callers */
 930                 cnt->lc_count = 1;
 931                 return;
 932         }
 933
 934         cnt->lc_min = LC_MIN_INIT;
 935
 936         num_entry = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
 937
 938         for (i = 0; i < num_entry; i++) {
 939                 if (stats->ls_percpu[i] == NULL)
 940                         continue;
 941                 percpu_cntr = lprocfs_stats_counter_get(stats, i, idx);
 942
 943                 cnt->lc_count += percpu_cntr->lc_count;
 944                 cnt->lc_sum += percpu_cntr->lc_sum;
 945                 if (percpu_cntr->lc_min < cnt->lc_min)
 946                         cnt->lc_min = percpu_cntr->lc_min;
 947                 if (percpu_cntr->lc_max > cnt->lc_max)
 948                         cnt->lc_max = percpu_cntr->lc_max;
 949                 cnt->lc_sumsquare += percpu_cntr->lc_sumsquare;
 950         }
 951
 952         lprocfs_stats_unlock(stats, LPROCFS_GET_NUM_CPU, &flags);
 953 }
 954 EXPORT_SYMBOL(lprocfs_stats_collect);
 955
 956 /**
 957  * Append a space separated list of current set flags to str.
 958  */
 959 #define flag2seqstr(flag)                                               \
 960         do {                                                            \
 961                 if (imp->imp_##flag)                                    \
 962                         seq_printf(m, "%s" #flag, first ? "" : ", ");   \
 963         } while (0)
 964 static int obd_import_flags2seqstr(struct obd_import *imp, struct seq_file *m)
 965 {
 966         bool first = true;
 967
 968         if (imp->imp_obd->obd_no_recov) {
 969                 seq_printf(m, "no_recov");
 970                 first = false;
 971         }
 972
 973         flag2seqstr(invalid);
 974         flag2seqstr(deactive);
 975         flag2seqstr(replayable);
 976         flag2seqstr(pingable);
 977         return 0;
 978 }
 979 #undef flags2seqstr
 980
 981 static const char *obd_connect_names[] = {
 982         "read_only",
 983         "lov_index",
 984         "connect_from_mds",
 985         "write_grant",
 986         "server_lock",
 987         "version",
 988         "request_portal",
 989         "acl",
 990         "xattr",
 991         "create_on_write",
 992         "truncate_lock",
 993         "initial_transno",
 994         "inode_bit_locks",
 995         "join_file(obsolete)",
 996         "getattr_by_fid",
 997         "no_oh_for_devices",
 998         "remote_client",
 999         "remote_client_by_force",
1000         "max_byte_per_rpc",
1001         "64bit_qdata",
1002         "mds_capability",
1003         "oss_capability",
1004         "early_lock_cancel",
1005         "som",
1006         "adaptive_timeouts",
1007         "lru_resize",
1008         "mds_mds_connection",
1009         "real_conn",
1010         "change_qunit_size",
1011         "alt_checksum_algorithm",
1012         "fid_is_enabled",
1013         "version_recovery",
1014         "pools",
1015         "grant_shrink",
1016         "skip_orphan",
1017         "large_ea",
1018         "full20",
1019         "layout_lock",
1020         "64bithash",
1021         "object_max_bytes",
1022         "imp_recov",
1023         "jobstats",
1024         "umask",
1025         "einprogress",
1026         "grant_param",
1027         "flock_owner",
1028         "lvb_type",
1029         "nanoseconds_times",
1030         "lightweight_conn",
1031         "short_io",
1032         "pingless",
1033         "flock_deadlock",
1034         "disp_stripe",
1035         "unknown",
1036         NULL
1037 };
1038
1039 static void obd_connect_seq_flags2str(struct seq_file *m, __u64 flags, char *sep)
1040 {
1041         bool first = true;
1042         __u64 mask = 1;
1043         int i;
1044
1045         for (i = 0; obd_connect_names[i] != NULL; i++, mask <<= 1) {
1046                 if (flags & mask) {
1047                         seq_printf(m, "%s%s",
1048                                    first ? "" : sep, obd_connect_names[i]);
1049                         first = false;
1050                 }
1051         }
1052         if (flags & ~(mask - 1))
1053                 seq_printf(m, "%sunknown flags "LPX64,
1054                            first ? "" : sep, flags & ~(mask - 1));
1055 }
1056
1057 int obd_connect_flags2str(char *page, int count, __u64 flags, char *sep)
1058 {
1059         __u64 mask = 1;
1060         int i, ret = 0;
1061
1062         for (i = 0; obd_connect_names[i] != NULL; i++, mask <<= 1) {
1063                 if (flags & mask)
1064                         ret += snprintf(page + ret, count - ret, "%s%s",
1065                                         ret ? sep : "", obd_connect_names[i]);
1066         }
1067         if (flags & ~(mask - 1))
1068                 ret += snprintf(page + ret, count - ret,
1069                                 "%sunknown flags "LPX64,
1070                                 ret ? sep : "", flags & ~(mask - 1));
1071         return ret;
1072 }
1073 EXPORT_SYMBOL(obd_connect_flags2str);
1074
1075 static void obd_connect_data_seqprint(struct seq_file *m,
1076                                       struct obd_connect_data *ocd)
1077 {
1078         int flags;
1079
1080         LASSERT(ocd != NULL);
1081         flags = ocd->ocd_connect_flags;
1082
1083         seq_printf(m, "    connect_data:\n"
1084                       "       flags: "LPX64"\n"
1085                       "       instance: %u\n",
1086                       ocd->ocd_connect_flags,
1087                       ocd->ocd_instance);
1088         if (flags & OBD_CONNECT_VERSION)
1089                 seq_printf(m, "       target_version: %u.%u.%u.%u\n",
1090                               OBD_OCD_VERSION_MAJOR(ocd->ocd_version),
1091                               OBD_OCD_VERSION_MINOR(ocd->ocd_version),
1092                               OBD_OCD_VERSION_PATCH(ocd->ocd_version),
1093                               OBD_OCD_VERSION_FIX(ocd->ocd_version));
1094         if (flags & OBD_CONNECT_MDS)
1095                 seq_printf(m, "       mdt_index: %d\n", ocd->ocd_group);
1096         if (flags & OBD_CONNECT_GRANT)
1097                 seq_printf(m, "       initial_grant: %d\n", ocd->ocd_grant);
1098         if (flags & OBD_CONNECT_INDEX)
1099                 seq_printf(m, "       target_index: %u\n", ocd->ocd_index);
1100         if (flags & OBD_CONNECT_BRW_SIZE)
1101                 seq_printf(m, "       max_brw_size: %d\n", ocd->ocd_brw_size);
1102         if (flags & OBD_CONNECT_IBITS)
1103                 seq_printf(m, "       ibits_known: "LPX64"\n",
1104                                 ocd->ocd_ibits_known);
1105         if (flags & OBD_CONNECT_GRANT_PARAM)
1106                 seq_printf(m, "       grant_block_size: %d\n"
1107                               "       grant_inode_size: %d\n"
1108                               "       grant_extent_overhead: %d\n",
1109                               ocd->ocd_blocksize,
1110                               ocd->ocd_inodespace,
1111                               ocd->ocd_grant_extent);
1112         if (flags & OBD_CONNECT_TRANSNO)
1113                 seq_printf(m, "       first_transno: "LPX64"\n",
1114                                 ocd->ocd_transno);
1115         if (flags & OBD_CONNECT_CKSUM)
1116                 seq_printf(m, "       cksum_types: %#x\n",
1117                               ocd->ocd_cksum_types);
1118         if (flags & OBD_CONNECT_MAX_EASIZE)
1119                 seq_printf(m, "       max_easize: %d\n", ocd->ocd_max_easize);
1120         if (flags & OBD_CONNECT_MAXBYTES)
1121                 seq_printf(m, "       max_object_bytes: "LPU64"\n",
1122                               ocd->ocd_maxbytes);
1123 }
1124
1125 int lprocfs_import_seq_show(struct seq_file *m, void *data)
1126 {
1127         struct lprocfs_counter          ret;
1128         struct lprocfs_counter_header   *header;
1129         struct obd_device               *obd    = (struct obd_device *)data;
1130         struct obd_import               *imp;
1131         struct obd_import_conn          *conn;
1132         struct obd_connect_data         *ocd;
1133         int                             j;
1134         int                             k;
1135         int                             rw      = 0;
1136
1137         LASSERT(obd != NULL);
1138         LPROCFS_CLIMP_CHECK(obd);
1139         imp = obd->u.cli.cl_import;
1140         ocd = &imp->imp_connect_data;
1141
1142         seq_printf(m, "import:\n"
1143                       "    name: %s\n"
1144                       "    target: %s\n"
1145                       "    state: %s\n"
1146                       "    connect_flags: [",
1147                       obd->obd_name,
1148                       obd2cli_tgt(obd),
1149                       ptlrpc_import_state_name(imp->imp_state));
1150         obd_connect_seq_flags2str(m, imp->imp_connect_data.ocd_connect_flags,
1151                                         ", ");
1152         seq_printf(m, "]\n");
1153         obd_connect_data_seqprint(m, ocd);
1154         seq_printf(m, "    import_flags: [");
1155         obd_import_flags2seqstr(imp, m);
1156
1157         seq_printf(m, "]\n"
1158                       "    connection:\n"
1159                       "       failover_nids: [");
1160         spin_lock(&imp->imp_lock);
1161         j = 0;
1162         list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
1163                 seq_printf(m, "%s%s", j ? ", " : "",
1164                            libcfs_nid2str(conn->oic_conn->c_peer.nid));
1165                 j++;
1166         }
1167         seq_printf(m, "]\n"
1168                       "       current_connection: %s\n"
1169                       "       connection_attempts: %u\n"
1170                       "       generation: %u\n"
1171                       "       in-progress_invalidations: %u\n",
1172                       imp->imp_connection == NULL ? "<none>" :
1173                               libcfs_nid2str(imp->imp_connection->c_peer.nid),
1174                       imp->imp_conn_cnt,
1175                       imp->imp_generation,
1176                       atomic_read(&imp->imp_inval_count));
1177         spin_unlock(&imp->imp_lock);
1178
1179         if (obd->obd_svc_stats == NULL)
1180                 goto out_climp;
1181
1182         header = &obd->obd_svc_stats->ls_cnt_header[PTLRPC_REQWAIT_CNTR];
1183         lprocfs_stats_collect(obd->obd_svc_stats, PTLRPC_REQWAIT_CNTR, &ret);
1184         if (ret.lc_count != 0) {
1185                 /* first argument to do_div MUST be __u64 */
1186                 __u64 sum = ret.lc_sum;
1187                 do_div(sum, ret.lc_count);
1188                 ret.lc_sum = sum;
1189         } else
1190                 ret.lc_sum = 0;
1191         seq_printf(m, "    rpcs:\n"
1192                       "       inflight: %u\n"
1193                       "       unregistering: %u\n"
1194                       "       timeouts: %u\n"
1195                       "       avg_waittime: "LPU64" %s\n",
1196                       atomic_read(&imp->imp_inflight),
1197                       atomic_read(&imp->imp_unregistering),
1198                       atomic_read(&imp->imp_timeouts),
1199                       ret.lc_sum, header->lc_units);
1200
1201         k = 0;
1202         for(j = 0; j < IMP_AT_MAX_PORTALS; j++) {
1203                 if (imp->imp_at.iat_portal[j] == 0)
1204                         break;
1205                 k = max_t(unsigned int, k,
1206                           at_get(&imp->imp_at.iat_service_estimate[j]));
1207         }
1208         seq_printf(m, "    service_estimates:\n"
1209                       "       services: %u sec\n"
1210                       "       network: %u sec\n",
1211                       k,
1212                       at_get(&imp->imp_at.iat_net_latency));
1213
1214         seq_printf(m, "    transactions:\n"
1215                       "       last_replay: "LPU64"\n"
1216                       "       peer_committed: "LPU64"\n"
1217                       "       last_checked: "LPU64"\n",
1218                       imp->imp_last_replay_transno,
1219                       imp->imp_peer_committed_transno,
1220                       imp->imp_last_transno_checked);
1221
1222         /* avg data rates */
1223         for (rw = 0; rw <= 1; rw++) {
1224                 lprocfs_stats_collect(obd->obd_svc_stats,
1225                                       PTLRPC_LAST_CNTR + BRW_READ_BYTES + rw,
1226                                       &ret);
1227                 if (ret.lc_sum > 0 && ret.lc_count > 0) {
1228                         /* first argument to do_div MUST be __u64 */
1229                         __u64 sum = ret.lc_sum;
1230                         do_div(sum, ret.lc_count);
1231                         ret.lc_sum = sum;
1232                         seq_printf(m, "    %s_data_averages:\n"
1233                                       "       bytes_per_rpc: "LPU64"\n",
1234                                       rw ? "write" : "read",
1235                                       ret.lc_sum);
1236                 }
1237                 k = (int)ret.lc_sum;
1238                 j = opcode_offset(OST_READ + rw) + EXTRA_MAX_OPCODES;
1239                 header = &obd->obd_svc_stats->ls_cnt_header[j];
1240                 lprocfs_stats_collect(obd->obd_svc_stats, j, &ret);
1241                 if (ret.lc_sum > 0 && ret.lc_count != 0) {
1242                         /* first argument to do_div MUST be __u64 */
1243                         __u64 sum = ret.lc_sum;
1244                         do_div(sum, ret.lc_count);
1245                         ret.lc_sum = sum;
1246                         seq_printf(m, "       %s_per_rpc: "LPU64"\n",
1247                                         header->lc_units, ret.lc_sum);
1248                         j = (int)ret.lc_sum;
1249                         if (j > 0)
1250                                 seq_printf(m, "       MB_per_sec: %u.%.02u\n",
1251                                                 k / j, (100 * k / j) % 100);
1252                 }
1253         }
1254
1255 out_climp:
1256         LPROCFS_CLIMP_EXIT(obd);
1257         return 0;
1258 }
1259 EXPORT_SYMBOL(lprocfs_import_seq_show);
1260
1261 int lprocfs_state_seq_show(struct seq_file *m, void *data)
1262 {
1263         struct obd_device *obd = (struct obd_device *)data;
1264         struct obd_import *imp;
1265         int j, k;
1266
1267         LASSERT(obd != NULL);
1268         LPROCFS_CLIMP_CHECK(obd);
1269         imp = obd->u.cli.cl_import;
1270
1271         seq_printf(m, "current_state: %s\n",
1272                    ptlrpc_import_state_name(imp->imp_state));
1273         seq_printf(m, "state_history:\n");
1274         k = imp->imp_state_hist_idx;
1275         for (j = 0; j < IMP_STATE_HIST_LEN; j++) {
1276                 struct import_state_hist *ish =
1277                         &imp->imp_state_hist[(k + j) % IMP_STATE_HIST_LEN];
1278                 if (ish->ish_state == 0)
1279                         continue;
1280                 seq_printf(m, " - ["CFS_TIME_T", %s]\n",
1281                            ish->ish_time,
1282                 ptlrpc_import_state_name(ish->ish_state));
1283         }
1284
1285         LPROCFS_CLIMP_EXIT(obd);
1286         return 0;
1287 }
1288 EXPORT_SYMBOL(lprocfs_state_seq_show);
1289
1290 int lprocfs_seq_at_hist_helper(struct seq_file *m, struct adaptive_timeout *at)
1291 {
1292         int i;
1293         for (i = 0; i < AT_BINS; i++)
1294                 seq_printf(m, "%3u ", at->at_hist[i]);
1295         seq_printf(m, "\n");
1296         return 0;
1297 }
1298 EXPORT_SYMBOL(lprocfs_seq_at_hist_helper);
1299
1300 /* See also ptlrpc_lprocfs_timeouts_show_seq */
1301 int lprocfs_timeouts_seq_show(struct seq_file *m, void *data)
1302 {
1303         struct obd_device *obd = (struct obd_device *)data;
1304         struct obd_import *imp;
1305         unsigned int cur, worst;
1306         time_t now, worstt;
1307         struct dhms ts;
1308         int i;
1309
1310         LASSERT(obd != NULL);
1311         LPROCFS_CLIMP_CHECK(obd);
1312         imp = obd->u.cli.cl_import;
1313
1314         now = cfs_time_current_sec();
1315
1316         /* Some network health info for kicks */
1317         s2dhms(&ts, now - imp->imp_last_reply_time);
1318         seq_printf(m, "%-10s : %ld, "DHMS_FMT" ago\n",
1319                    "last reply", imp->imp_last_reply_time, DHMS_VARS(&ts));
1320
1321         cur = at_get(&imp->imp_at.iat_net_latency);
1322         worst = imp->imp_at.iat_net_latency.at_worst_ever;
1323         worstt = imp->imp_at.iat_net_latency.at_worst_time;
1324         s2dhms(&ts, now - worstt);
1325         seq_printf(m, "%-10s : cur %3u  worst %3u (at %ld, "DHMS_FMT" ago) ",
1326                    "network", cur, worst, worstt, DHMS_VARS(&ts));
1327         lprocfs_seq_at_hist_helper(m, &imp->imp_at.iat_net_latency);
1328
1329         for(i = 0; i < IMP_AT_MAX_PORTALS; i++) {
1330                 if (imp->imp_at.iat_portal[i] == 0)
1331                         break;
1332                 cur = at_get(&imp->imp_at.iat_service_estimate[i]);
1333                 worst = imp->imp_at.iat_service_estimate[i].at_worst_ever;
1334                 worstt = imp->imp_at.iat_service_estimate[i].at_worst_time;
1335                 s2dhms(&ts, now - worstt);
1336                 seq_printf(m, "portal %-2d  : cur %3u  worst %3u (at %ld, "
1337                            DHMS_FMT" ago) ", imp->imp_at.iat_portal[i],
1338                            cur, worst, worstt, DHMS_VARS(&ts));
1339                 lprocfs_seq_at_hist_helper(m, &imp->imp_at.iat_service_estimate[i]);
1340         }
1341
1342         LPROCFS_CLIMP_EXIT(obd);
1343         return 0;
1344 }
1345 EXPORT_SYMBOL(lprocfs_timeouts_seq_show);
1346
1347 int lprocfs_connect_flags_seq_show(struct seq_file *m, void *data)
1348 {
1349         struct obd_device *obd = data;
1350         __u64 flags;
1351
1352         LPROCFS_CLIMP_CHECK(obd);
1353         flags = obd->u.cli.cl_import->imp_connect_data.ocd_connect_flags;
1354         seq_printf(m, "flags="LPX64"\n", flags);
1355         obd_connect_seq_flags2str(m, flags, "\n");
1356         seq_printf(m, "\n");
1357         LPROCFS_CLIMP_EXIT(obd);
1358         return 0;
1359 }
1360 EXPORT_SYMBOL(lprocfs_connect_flags_seq_show);
1361
1362 #ifdef HAVE_SERVER_SUPPORT
1363 int lprocfs_num_exports_seq_show(struct seq_file *m, void *data)
1364 {
1365         struct obd_device *obd = data;
1366
1367         LASSERT(obd != NULL);
1368         return seq_printf(m, "%u\n", obd->obd_num_exports);
1369 }
1370 EXPORT_SYMBOL(lprocfs_num_exports_seq_show);
1371 #endif
1372
1373 #ifndef HAVE_ONLY_PROCFS_SEQ
1374
1375 int lprocfs_rd_uint(char *page, char **start, off_t off,
1376                     int count, int *eof, void *data)
1377 {
1378         unsigned int *temp = data;
1379         return snprintf(page, count, "%u\n", *temp);
1380 }
1381 EXPORT_SYMBOL(lprocfs_rd_uint);
1382
1383 int lprocfs_rd_u64(char *page, char **start, off_t off,
1384                    int count, int *eof, void *data)
1385 {
1386         LASSERT(data != NULL);
1387         *eof = 1;
1388         return snprintf(page, count, LPU64"\n", *(__u64 *)data);
1389 }
1390 EXPORT_SYMBOL(lprocfs_rd_u64);
1391
1392 int lprocfs_rd_atomic(char *page, char **start, off_t off,
1393                    int count, int *eof, void *data)
1394 {
1395         atomic_t *atom = data;
1396         LASSERT(atom != NULL);
1397         *eof = 1;
1398         return snprintf(page, count, "%d\n", atomic_read(atom));
1399 }
1400 EXPORT_SYMBOL(lprocfs_rd_atomic);
1401
1402 int lprocfs_wr_atomic(struct file *file, const char *buffer,
1403                       unsigned long count, void *data)
1404 {
1405         atomic_t *atm = data;
1406         int val = 0;
1407         int rc;
1408
1409         rc = lprocfs_write_helper(buffer, count, &val);
1410         if (rc < 0)
1411                 return rc;
1412
1413         if (val <= 0)
1414                 return -ERANGE;
1415
1416         atomic_set(atm, val);
1417         return count;
1418 }
1419 EXPORT_SYMBOL(lprocfs_wr_atomic);
1420
1421 int lprocfs_rd_uuid(char *page, char **start, off_t off, int count,
1422                     int *eof, void *data)
1423 {
1424         struct obd_device *obd = data;
1425
1426         LASSERT(obd != NULL);
1427         *eof = 1;
1428         return snprintf(page, count, "%s\n", obd->obd_uuid.uuid);
1429 }
1430 EXPORT_SYMBOL(lprocfs_rd_uuid);
1431
1432 int lprocfs_rd_name(char *page, char **start, off_t off, int count,
1433                     int *eof, void *data)
1434 {
1435         struct obd_device *dev = data;
1436
1437         LASSERT(dev != NULL);
1438         *eof = 1;
1439         return snprintf(page, count, "%s\n", dev->obd_name);
1440 }
1441 EXPORT_SYMBOL(lprocfs_rd_name);
1442
1443 int lprocfs_rd_blksize(char *page, char **start, off_t off, int count,
1444                        int *eof, void *data)
1445 {
1446         struct obd_device *obd = data;
1447         struct obd_statfs  osfs;
1448         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
1449                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1450                             OBD_STATFS_NODELAY);
1451         if (!rc) {
1452                 *eof = 1;
1453                 rc = snprintf(page, count, "%u\n", osfs.os_bsize);
1454         }
1455         return rc;
1456 }
1457 EXPORT_SYMBOL(lprocfs_rd_blksize);
1458
1459 int lprocfs_rd_kbytestotal(char *page, char **start, off_t off, int count,
1460                            int *eof, void *data)
1461 {
1462         struct obd_device *obd = data;
1463         struct obd_statfs  osfs;
1464         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
1465                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1466                             OBD_STATFS_NODELAY);
1467         if (!rc) {
1468                 __u32 blk_size = osfs.os_bsize >> 10;
1469                 __u64 result = osfs.os_blocks;
1470
1471                 while (blk_size >>= 1)
1472                         result <<= 1;
1473
1474                 *eof = 1;
1475                 rc = snprintf(page, count, LPU64"\n", result);
1476         }
1477         return rc;
1478 }
1479 EXPORT_SYMBOL(lprocfs_rd_kbytestotal);
1480
1481 int lprocfs_rd_kbytesfree(char *page, char **start, off_t off, int count,
1482                           int *eof, void *data)
1483 {
1484         struct obd_device *obd = data;
1485         struct obd_statfs  osfs;
1486         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
1487                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1488                             OBD_STATFS_NODELAY);
1489         if (!rc) {
1490                 __u32 blk_size = osfs.os_bsize >> 10;
1491                 __u64 result = osfs.os_bfree;
1492
1493                 while (blk_size >>= 1)
1494                         result <<= 1;
1495
1496                 *eof = 1;
1497                 rc = snprintf(page, count, LPU64"\n", result);
1498         }
1499         return rc;
1500 }
1501 EXPORT_SYMBOL(lprocfs_rd_kbytesfree);
1502
1503 int lprocfs_rd_kbytesavail(char *page, char **start, off_t off, int count,
1504                            int *eof, void *data)
1505 {
1506         struct obd_device *obd = data;
1507         struct obd_statfs  osfs;
1508         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
1509                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1510                             OBD_STATFS_NODELAY);
1511         if (!rc) {
1512                 __u32 blk_size = osfs.os_bsize >> 10;
1513                 __u64 result = osfs.os_bavail;
1514
1515                 while (blk_size >>= 1)
1516                         result <<= 1;
1517
1518                 *eof = 1;
1519                 rc = snprintf(page, count, LPU64"\n", result);
1520         }
1521         return rc;
1522 }
1523 EXPORT_SYMBOL(lprocfs_rd_kbytesavail);
1524
1525 int lprocfs_rd_filestotal(char *page, char **start, off_t off, int count,
1526                           int *eof, void *data)
1527 {
1528         struct obd_device *obd = data;
1529         struct obd_statfs  osfs;
1530         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
1531                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1532                             OBD_STATFS_NODELAY);
1533         if (!rc) {
1534                 *eof = 1;
1535                 rc = snprintf(page, count, LPU64"\n", osfs.os_files);
1536         }
1537
1538         return rc;
1539 }
1540 EXPORT_SYMBOL(lprocfs_rd_filestotal);
1541
1542 int lprocfs_rd_filesfree(char *page, char **start, off_t off, int count,
1543                          int *eof, void *data)
1544 {
1545         struct obd_device *obd = data;
1546         struct obd_statfs  osfs;
1547         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
1548                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1549                             OBD_STATFS_NODELAY);
1550         if (!rc) {
1551                 *eof = 1;
1552                 rc = snprintf(page, count, LPU64"\n", osfs.os_ffree);
1553         }
1554         return rc;
1555 }
1556 EXPORT_SYMBOL(lprocfs_rd_filesfree);
1557
1558 int lprocfs_rd_server_uuid(char *page, char **start, off_t off, int count,
1559                            int *eof, void *data)
1560 {
1561         struct obd_device *obd = data;
1562         struct obd_import *imp;
1563         char *imp_state_name = NULL;
1564         int rc = 0;
1565
1566         LASSERT(obd != NULL);
1567         LPROCFS_CLIMP_CHECK(obd);
1568         imp = obd->u.cli.cl_import;
1569         imp_state_name = ptlrpc_import_state_name(imp->imp_state);
1570         *eof = 1;
1571         rc = snprintf(page, count, "%s\t%s%s\n",
1572                       obd2cli_tgt(obd), imp_state_name,
1573                       imp->imp_deactive ? "\tDEACTIVATED" : "");
1574
1575         LPROCFS_CLIMP_EXIT(obd);
1576         return rc;
1577 }
1578 EXPORT_SYMBOL(lprocfs_rd_server_uuid);
1579
1580 int lprocfs_rd_conn_uuid(char *page, char **start, off_t off, int count,
1581                          int *eof,  void *data)
1582 {
1583         struct obd_device *obd = data;
1584         struct ptlrpc_connection *conn;
1585         int rc = 0;
1586
1587         LASSERT(obd != NULL);
1588
1589         LPROCFS_CLIMP_CHECK(obd);
1590         conn = obd->u.cli.cl_import->imp_connection;
1591         *eof = 1;
1592         if (conn && obd->u.cli.cl_import) {
1593                 rc = snprintf(page, count, "%s\n",
1594                               conn->c_remote_uuid.uuid);
1595         } else {
1596                 rc = snprintf(page, count, "%s\n", "<none>");
1597         }
1598
1599         LPROCFS_CLIMP_EXIT(obd);
1600         return rc;
1601 }
1602 EXPORT_SYMBOL(lprocfs_rd_conn_uuid);
1603
1604 /**
1605  * Append a space separated list of current set flags to str.
1606  */
1607 #define flag2str(flag) \
1608         if (imp->imp_##flag && max - len > 0) \
1609              len += snprintf(str + len, max - len, "%s" #flag, len ? ", " : "");
1610 static int obd_import_flags2str(struct obd_import *imp, char *str, int max)
1611 {
1612         int len = 0;
1613
1614         if (imp->imp_obd->obd_no_recov)
1615                 len += snprintf(str, max - len, "no_recov");
1616
1617         flag2str(invalid);
1618         flag2str(deactive);
1619         flag2str(replayable);
1620         flag2str(pingable);
1621         return len;
1622 }
1623 #undef flags2str
1624
1625 int lprocfs_rd_import(char *page, char **start, off_t off, int count,
1626                       int *eof, void *data)
1627 {
1628         struct lprocfs_counter          ret;
1629         struct lprocfs_counter_header   *header;
1630         struct obd_device               *obd    = (struct obd_device *)data;
1631         struct obd_import               *imp;
1632         struct obd_import_conn          *conn;
1633         int                             i;
1634         int                             j;
1635         int                             k;
1636         int                             rw      = 0;
1637
1638         LASSERT(obd != NULL);
1639         LPROCFS_CLIMP_CHECK(obd);
1640         imp = obd->u.cli.cl_import;
1641         *eof = 1;
1642
1643         i = snprintf(page, count,
1644                      "import:\n"
1645                      "    name: %s\n"
1646                      "    target: %s\n"
1647                      "    state: %s\n"
1648                      "    instance: %u\n"
1649                      "    connect_flags: [",
1650                      obd->obd_name,
1651                      obd2cli_tgt(obd),
1652                      ptlrpc_import_state_name(imp->imp_state),
1653                      imp->imp_connect_data.ocd_instance);
1654         i += obd_connect_flags2str(page + i, count - i,
1655                                    imp->imp_connect_data.ocd_connect_flags,
1656                                    ", ");
1657         i += snprintf(page + i, count - i,
1658                       "]\n"
1659                       "    import_flags: [");
1660         i += obd_import_flags2str(imp, page + i, count - i);
1661
1662         i += snprintf(page + i, count - i,
1663                       "]\n"
1664                       "    connection:\n"
1665                       "       failover_nids: [");
1666         spin_lock(&imp->imp_lock);
1667         j = 0;
1668         cfs_list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
1669                 i += snprintf(page + i, count - i, "%s%s", j ? ", " : "",
1670                               libcfs_nid2str(conn->oic_conn->c_peer.nid));
1671                 j++;
1672         }
1673         i += snprintf(page + i, count - i,
1674                       "]\n"
1675                       "       current_connection: %s\n"
1676                       "       connection_attempts: %u\n"
1677                       "       generation: %u\n"
1678                       "       in-progress_invalidations: %u\n",
1679                       imp->imp_connection == NULL ? "<none>" :
1680                               libcfs_nid2str(imp->imp_connection->c_peer.nid),
1681                       imp->imp_conn_cnt,
1682                       imp->imp_generation,
1683                       atomic_read(&imp->imp_inval_count));
1684         spin_unlock(&imp->imp_lock);
1685
1686         if (obd->obd_svc_stats == NULL)
1687                 goto out_climp;
1688
1689         header = &obd->obd_svc_stats->ls_cnt_header[PTLRPC_REQWAIT_CNTR];
1690         lprocfs_stats_collect(obd->obd_svc_stats, PTLRPC_REQWAIT_CNTR, &ret);
1691         if (ret.lc_count != 0) {
1692                 /* first argument to do_div MUST be __u64 */
1693                 __u64 sum = ret.lc_sum;
1694                 do_div(sum, ret.lc_count);
1695                 ret.lc_sum = sum;
1696         } else
1697                 ret.lc_sum = 0;
1698         i += snprintf(page + i, count - i,
1699                       "    rpcs:\n"
1700                       "       inflight: %u\n"
1701                       "       unregistering: %u\n"
1702                       "       timeouts: %u\n"
1703                       "       avg_waittime: "LPU64" %s\n",
1704                       atomic_read(&imp->imp_inflight),
1705                       atomic_read(&imp->imp_unregistering),
1706                       atomic_read(&imp->imp_timeouts),
1707                       ret.lc_sum, header->lc_units);
1708
1709         k = 0;
1710         for(j = 0; j < IMP_AT_MAX_PORTALS; j++) {
1711                 if (imp->imp_at.iat_portal[j] == 0)
1712                         break;
1713                 k = max_t(unsigned int, k,
1714                           at_get(&imp->imp_at.iat_service_estimate[j]));
1715         }
1716         i += snprintf(page + i, count - i,
1717                       "    service_estimates:\n"
1718                       "       services: %u sec\n"
1719                       "       network: %u sec\n",
1720                       k,
1721                       at_get(&imp->imp_at.iat_net_latency));
1722
1723         i += snprintf(page + i, count - i,
1724                       "    transactions:\n"
1725                       "       last_replay: "LPU64"\n"
1726                       "       peer_committed: "LPU64"\n"
1727                       "       last_checked: "LPU64"\n",
1728                       imp->imp_last_replay_transno,
1729                       imp->imp_peer_committed_transno,
1730                       imp->imp_last_transno_checked);
1731
1732         /* avg data rates */
1733         for (rw = 0; rw <= 1; rw++) {
1734                 lprocfs_stats_collect(obd->obd_svc_stats,
1735                                       PTLRPC_LAST_CNTR + BRW_READ_BYTES + rw,
1736                                       &ret);
1737                 if (ret.lc_sum > 0 && ret.lc_count > 0) {
1738                         /* first argument to do_div MUST be __u64 */
1739                         __u64 sum = ret.lc_sum;
1740                         do_div(sum, ret.lc_count);
1741                         ret.lc_sum = sum;
1742                         i += snprintf(page + i, count - i,
1743                                       "    %s_data_averages:\n"
1744                                       "       bytes_per_rpc: "LPU64"\n",
1745                                       rw ? "write" : "read",
1746                                       ret.lc_sum);
1747                 }
1748                 k = (int)ret.lc_sum;
1749                 j = opcode_offset(OST_READ + rw) + EXTRA_MAX_OPCODES;
1750                 header = &obd->obd_svc_stats->ls_cnt_header[j];
1751                 lprocfs_stats_collect(obd->obd_svc_stats, j, &ret);
1752                 if (ret.lc_sum > 0 && ret.lc_count != 0) {
1753                         /* first argument to do_div MUST be __u64 */
1754                         __u64 sum = ret.lc_sum;
1755                         do_div(sum, ret.lc_count);
1756                         ret.lc_sum = sum;
1757                         i += snprintf(page + i, count - i,
1758                                       "       %s_per_rpc: "LPU64"\n",
1759                                       header->lc_units, ret.lc_sum);
1760                         j = (int)ret.lc_sum;
1761                         if (j > 0)
1762                                 i += snprintf(page + i, count - i,
1763                                               "       MB_per_sec: %u.%.02u\n",
1764                                               k / j, (100 * k / j) % 100);
1765                 }
1766         }
1767
1768 out_climp:
1769         LPROCFS_CLIMP_EXIT(obd);
1770         return i;
1771 }
1772 EXPORT_SYMBOL(lprocfs_rd_import);
1773
1774 int lprocfs_rd_state(char *page, char **start, off_t off, int count,
1775                       int *eof, void *data)
1776 {
1777         struct obd_device *obd = (struct obd_device *)data;
1778         struct obd_import *imp;
1779         int i, j, k;
1780
1781         LASSERT(obd != NULL);
1782         LPROCFS_CLIMP_CHECK(obd);
1783         imp = obd->u.cli.cl_import;
1784         *eof = 1;
1785
1786         i = snprintf(page, count, "current_state: %s\n",
1787                      ptlrpc_import_state_name(imp->imp_state));
1788         i += snprintf(page + i, count - i,
1789                       "state_history:\n");
1790         k = imp->imp_state_hist_idx;
1791         for (j = 0; j < IMP_STATE_HIST_LEN; j++) {
1792                 struct import_state_hist *ish =
1793                         &imp->imp_state_hist[(k + j) % IMP_STATE_HIST_LEN];
1794                 if (ish->ish_state == 0)
1795                         continue;
1796                 i += snprintf(page + i, count - i, " - ["CFS_TIME_T", %s]\n",
1797                               ish->ish_time,
1798                               ptlrpc_import_state_name(ish->ish_state));
1799         }
1800
1801         LPROCFS_CLIMP_EXIT(obd);
1802         return i;
1803 }
1804 EXPORT_SYMBOL(lprocfs_rd_state);
1805
1806 int lprocfs_at_hist_helper(char *page, int count, int rc,
1807                            struct adaptive_timeout *at)
1808 {
1809         int i;
1810         for (i = 0; i < AT_BINS; i++)
1811                 rc += snprintf(page + rc, count - rc, "%3u ", at->at_hist[i]);
1812         rc += snprintf(page + rc, count - rc, "\n");
1813         return rc;
1814 }
1815 EXPORT_SYMBOL(lprocfs_at_hist_helper);
1816
1817 /* See also ptlrpc_lprocfs_rd_timeouts */
1818 int lprocfs_rd_timeouts(char *page, char **start, off_t off, int count,
1819                         int *eof, void *data)
1820 {
1821         struct obd_device *obd = (struct obd_device *)data;
1822         struct obd_import *imp;
1823         unsigned int cur, worst;
1824         time_t now, worstt;
1825         struct dhms ts;
1826         int i, rc = 0;
1827
1828         LASSERT(obd != NULL);
1829         LPROCFS_CLIMP_CHECK(obd);
1830         imp = obd->u.cli.cl_import;
1831         *eof = 1;
1832
1833         now = cfs_time_current_sec();
1834
1835         /* Some network health info for kicks */
1836         s2dhms(&ts, now - imp->imp_last_reply_time);
1837         rc += snprintf(page + rc, count - rc,
1838                        "%-10s : %ld, "DHMS_FMT" ago\n",
1839                        "last reply", imp->imp_last_reply_time, DHMS_VARS(&ts));
1840
1841         cur = at_get(&imp->imp_at.iat_net_latency);
1842         worst = imp->imp_at.iat_net_latency.at_worst_ever;
1843         worstt = imp->imp_at.iat_net_latency.at_worst_time;
1844         s2dhms(&ts, now - worstt);
1845         rc += snprintf(page + rc, count - rc,
1846                        "%-10s : cur %3u  worst %3u (at %ld, "DHMS_FMT" ago) ",
1847                        "network", cur, worst, worstt, DHMS_VARS(&ts));
1848         rc = lprocfs_at_hist_helper(page, count, rc,
1849                                     &imp->imp_at.iat_net_latency);
1850
1851         for(i = 0; i < IMP_AT_MAX_PORTALS; i++) {
1852                 if (imp->imp_at.iat_portal[i] == 0)
1853                         break;
1854                 cur = at_get(&imp->imp_at.iat_service_estimate[i]);
1855                 worst = imp->imp_at.iat_service_estimate[i].at_worst_ever;
1856                 worstt = imp->imp_at.iat_service_estimate[i].at_worst_time;
1857                 s2dhms(&ts, now - worstt);
1858                 rc += snprintf(page + rc, count - rc,
1859                                "portal %-2d  : cur %3u  worst %3u (at %ld, "
1860                                DHMS_FMT" ago) ", imp->imp_at.iat_portal[i],
1861                                cur, worst, worstt, DHMS_VARS(&ts));
1862                 rc = lprocfs_at_hist_helper(page, count, rc,
1863                                           &imp->imp_at.iat_service_estimate[i]);
1864         }
1865
1866         LPROCFS_CLIMP_EXIT(obd);
1867         return rc;
1868 }
1869 EXPORT_SYMBOL(lprocfs_rd_timeouts);
1870
1871 int lprocfs_rd_connect_flags(char *page, char **start, off_t off,
1872                              int count, int *eof, void *data)
1873 {
1874         struct obd_device *obd = data;
1875         __u64 flags;
1876         int ret = 0;
1877
1878         LPROCFS_CLIMP_CHECK(obd);
1879         flags = obd->u.cli.cl_import->imp_connect_data.ocd_connect_flags;
1880         ret = snprintf(page, count, "flags="LPX64"\n", flags);
1881         ret += obd_connect_flags2str(page + ret, count - ret, flags, "\n");
1882         ret += snprintf(page + ret, count - ret, "\n");
1883         LPROCFS_CLIMP_EXIT(obd);
1884         return ret;
1885 }
1886 EXPORT_SYMBOL(lprocfs_rd_connect_flags);
1887
1888 #ifdef HAVE_SERVER_SUPPORT
1889 int lprocfs_rd_num_exports(char *page, char **start, off_t off, int count,
1890                            int *eof,  void *data)
1891 {
1892         struct obd_device *obd = data;
1893
1894         LASSERT(obd != NULL);
1895         *eof = 1;
1896         return snprintf(page, count, "%u\n", obd->obd_num_exports);
1897 }
1898 EXPORT_SYMBOL(lprocfs_rd_num_exports);
1899 #endif
1900
1901 int lprocfs_rd_numrefs(char *page, char **start, off_t off, int count,
1902                        int *eof, void *data)
1903 {
1904         struct obd_type *class = (struct obd_type*) data;
1905
1906         LASSERT(class != NULL);
1907         *eof = 1;
1908         return snprintf(page, count, "%d\n", class->typ_refcnt);
1909 }
1910 EXPORT_SYMBOL(lprocfs_rd_numrefs);
1911
1912 int lprocfs_obd_setup(struct obd_device *obd, struct lprocfs_vars *list)
1913 {
1914         int rc = 0;
1915
1916         LASSERT(obd != NULL);
1917         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1918         LASSERT(obd->obd_type->typ_procroot != NULL);
1919
1920         obd->obd_proc_entry = lprocfs_register(obd->obd_name,
1921                                                obd->obd_type->typ_procroot,
1922                                                list, obd);
1923         if (IS_ERR(obd->obd_proc_entry)) {
1924                 rc = PTR_ERR(obd->obd_proc_entry);
1925                 CERROR("error %d setting up lprocfs for %s\n",rc,obd->obd_name);
1926                 obd->obd_proc_entry = NULL;
1927         }
1928         return rc;
1929 }
1930 EXPORT_SYMBOL(lprocfs_obd_setup);
1931 #endif
1932
1933 int
1934 lprocfs_seq_obd_setup(struct obd_device *obd)
1935 {
1936         int rc = 0;
1937
1938         LASSERT(obd != NULL);
1939         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1940         LASSERT(obd->obd_type->typ_procroot != NULL);
1941
1942         obd->obd_proc_entry = lprocfs_seq_register(obd->obd_name,
1943                                                    obd->obd_type->typ_procroot,
1944                                                    obd->obd_vars, obd);
1945         if (IS_ERR(obd->obd_proc_entry)) {
1946                 rc = PTR_ERR(obd->obd_proc_entry);
1947                 CERROR("error %d setting up lprocfs for %s\n",rc,obd->obd_name);
1948                 obd->obd_proc_entry = NULL;
1949         }
1950         return rc;
1951 }
1952 EXPORT_SYMBOL(lprocfs_seq_obd_setup);
1953
1954 int lprocfs_obd_cleanup(struct obd_device *obd)
1955 {
1956         if (!obd)
1957                 return -EINVAL;
1958         if (obd->obd_proc_exports_entry) {
1959                 /* Should be no exports left */
1960                 lprocfs_remove(&obd->obd_proc_exports_entry);
1961                 obd->obd_proc_exports_entry = NULL;
1962         }
1963         if (obd->obd_proc_entry) {
1964                 lprocfs_remove(&obd->obd_proc_entry);
1965                 obd->obd_proc_entry = NULL;
1966         }
1967         return 0;
1968 }
1969 EXPORT_SYMBOL(lprocfs_obd_cleanup);
1970
1971 static void lprocfs_free_client_stats(struct nid_stat *client_stat)
1972 {
1973         CDEBUG(D_CONFIG, "stat %p - data %p/%p\n", client_stat,
1974                client_stat->nid_proc, client_stat->nid_stats);
1975
1976         LASSERTF(atomic_read(&client_stat->nid_exp_ref_count) == 0,
1977                  "nid %s:count %d\n", libcfs_nid2str(client_stat->nid),
1978                  atomic_read(&client_stat->nid_exp_ref_count));
1979
1980         if (client_stat->nid_proc)
1981                 lprocfs_remove(&client_stat->nid_proc);
1982
1983         if (client_stat->nid_stats)
1984                 lprocfs_free_stats(&client_stat->nid_stats);
1985
1986         if (client_stat->nid_ldlm_stats)
1987                 lprocfs_free_stats(&client_stat->nid_ldlm_stats);
1988
1989         OBD_FREE_PTR(client_stat);
1990         return;
1991
1992 }
1993
1994 void lprocfs_free_per_client_stats(struct obd_device *obd)
1995 {
1996         cfs_hash_t *hash = obd->obd_nid_stats_hash;
1997         struct nid_stat *stat;
1998         ENTRY;
1999
2000         /* we need extra list - because hash_exit called to early */
2001         /* not need locking because all clients is died */
2002         while (!cfs_list_empty(&obd->obd_nid_stats)) {
2003                 stat = cfs_list_entry(obd->obd_nid_stats.next,
2004                                       struct nid_stat, nid_list);
2005                 cfs_list_del_init(&stat->nid_list);
2006                 cfs_hash_del(hash, &stat->nid, &stat->nid_hash);
2007                 lprocfs_free_client_stats(stat);
2008         }
2009         EXIT;
2010 }
2011 EXPORT_SYMBOL(lprocfs_free_per_client_stats);
2012
2013 int lprocfs_stats_alloc_one(struct lprocfs_stats *stats, unsigned int cpuid)
2014 {
2015         struct lprocfs_counter  *cntr;
2016         unsigned int            percpusize;
2017         int                     rc = -ENOMEM;
2018         unsigned long           flags = 0;
2019         int                     i;
2020
2021         LASSERT(stats->ls_percpu[cpuid] == NULL);
2022         LASSERT((stats->ls_flags & LPROCFS_STATS_FLAG_NOPERCPU) == 0);
2023
2024         percpusize = lprocfs_stats_counter_size(stats);
2025         LIBCFS_ALLOC_ATOMIC(stats->ls_percpu[cpuid], percpusize);
2026         if (stats->ls_percpu[cpuid] != NULL) {
2027                 rc = 0;
2028                 if (unlikely(stats->ls_biggest_alloc_num <= cpuid)) {
2029                         if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE)
2030                                 spin_lock_irqsave(&stats->ls_lock, flags);
2031                         else
2032                                 spin_lock(&stats->ls_lock);
2033                         if (stats->ls_biggest_alloc_num <= cpuid)
2034                                 stats->ls_biggest_alloc_num = cpuid + 1;
2035                         if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE) {
2036                                 spin_unlock_irqrestore(&stats->ls_lock, flags);
2037                         } else {
2038                                 spin_unlock(&stats->ls_lock);
2039                         }
2040                 }
2041                 /* initialize the ls_percpu[cpuid] non-zero counter */
2042                 for (i = 0; i < stats->ls_num; ++i) {
2043                         cntr = lprocfs_stats_counter_get(stats, cpuid, i);
2044                         cntr->lc_min = LC_MIN_INIT;
2045                 }
2046         }
2047         return rc;
2048 }
2049 EXPORT_SYMBOL(lprocfs_stats_alloc_one);
2050
2051 struct lprocfs_stats *lprocfs_alloc_stats(unsigned int num,
2052                                           enum lprocfs_stats_flags flags)
2053 {
2054         struct lprocfs_stats    *stats;
2055         unsigned int            num_entry;
2056         unsigned int            percpusize = 0;
2057         int                     i;
2058
2059         if (num == 0)
2060                 return NULL;
2061
2062         if (lprocfs_no_percpu_stats != 0)
2063                 flags |= LPROCFS_STATS_FLAG_NOPERCPU;
2064
2065         if (flags & LPROCFS_STATS_FLAG_NOPERCPU)
2066                 num_entry = 1;
2067         else
2068                 num_entry = num_possible_cpus();
2069
2070         /* alloc percpu pointers for all possible cpu slots */
2071         LIBCFS_ALLOC(stats, offsetof(typeof(*stats), ls_percpu[num_entry]));
2072         if (stats == NULL)
2073                 return NULL;
2074
2075         stats->ls_num = num;
2076         stats->ls_flags = flags;
2077         spin_lock_init(&stats->ls_lock);
2078
2079         /* alloc num of counter headers */
2080         LIBCFS_ALLOC(stats->ls_cnt_header,
2081                      stats->ls_num * sizeof(struct lprocfs_counter_header));
2082         if (stats->ls_cnt_header == NULL)
2083                 goto fail;
2084
2085         if ((flags & LPROCFS_STATS_FLAG_NOPERCPU) != 0) {
2086                 /* contains only one set counters */
2087                 percpusize = lprocfs_stats_counter_size(stats);
2088                 LIBCFS_ALLOC_ATOMIC(stats->ls_percpu[0], percpusize);
2089                 if (stats->ls_percpu[0] == NULL)
2090                         goto fail;
2091                 stats->ls_biggest_alloc_num = 1;
2092         } else if ((flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0) {
2093                 /* alloc all percpu data, currently only obd_memory use this */
2094                 for (i = 0; i < num_entry; ++i)
2095                         if (lprocfs_stats_alloc_one(stats, i) < 0)
2096                                 goto fail;
2097         }
2098
2099         return stats;
2100
2101 fail:
2102         lprocfs_free_stats(&stats);
2103         return NULL;
2104 }
2105 EXPORT_SYMBOL(lprocfs_alloc_stats);
2106
2107 void lprocfs_free_stats(struct lprocfs_stats **statsh)
2108 {
2109         struct lprocfs_stats *stats = *statsh;
2110         unsigned int num_entry;
2111         unsigned int percpusize;
2112         unsigned int i;
2113
2114         if (stats == NULL || stats->ls_num == 0)
2115                 return;
2116         *statsh = NULL;
2117
2118         if (stats->ls_flags & LPROCFS_STATS_FLAG_NOPERCPU)
2119                 num_entry = 1;
2120         else
2121                 num_entry = num_possible_cpus();
2122
2123         percpusize = lprocfs_stats_counter_size(stats);
2124         for (i = 0; i < num_entry; i++)
2125                 if (stats->ls_percpu[i] != NULL)
2126                         LIBCFS_FREE(stats->ls_percpu[i], percpusize);
2127         if (stats->ls_cnt_header != NULL)
2128                 LIBCFS_FREE(stats->ls_cnt_header, stats->ls_num *
2129                                         sizeof(struct lprocfs_counter_header));
2130         LIBCFS_FREE(stats, offsetof(typeof(*stats), ls_percpu[num_entry]));
2131 }
2132 EXPORT_SYMBOL(lprocfs_free_stats);
2133
2134 void lprocfs_clear_stats(struct lprocfs_stats *stats)
2135 {
2136         struct lprocfs_counter          *percpu_cntr;
2137         int                             i;
2138         int                             j;
2139         unsigned int                    num_entry;
2140         unsigned long                   flags = 0;
2141
2142         num_entry = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
2143
2144         for (i = 0; i < num_entry; i++) {
2145                 if (stats->ls_percpu[i] == NULL)
2146                         continue;
2147                 for (j = 0; j < stats->ls_num; j++) {
2148                         percpu_cntr = lprocfs_stats_counter_get(stats, i, j);
2149                         percpu_cntr->lc_count           = 0;
2150                         percpu_cntr->lc_min             = LC_MIN_INIT;
2151                         percpu_cntr->lc_max             = 0;
2152                         percpu_cntr->lc_sumsquare       = 0;
2153                         percpu_cntr->lc_sum             = 0;
2154                         if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE)
2155                                 percpu_cntr->lc_sum_irq = 0;
2156                 }
2157         }
2158
2159         lprocfs_stats_unlock(stats, LPROCFS_GET_NUM_CPU, &flags);
2160 }
2161 EXPORT_SYMBOL(lprocfs_clear_stats);
2162
2163 static ssize_t lprocfs_stats_seq_write(struct file *file, const char *buf,
2164                                        size_t len, loff_t *off)
2165 {
2166         struct seq_file *seq = file->private_data;
2167         struct lprocfs_stats *stats = seq->private;
2168
2169         lprocfs_clear_stats(stats);
2170
2171         return len;
2172 }
2173
2174 static void *lprocfs_stats_seq_start(struct seq_file *p, loff_t *pos)
2175 {
2176         struct lprocfs_stats *stats = p->private;
2177
2178         return (*pos < stats->ls_num) ? pos : NULL;
2179 }
2180
2181 static void lprocfs_stats_seq_stop(struct seq_file *p, void *v)
2182 {
2183 }
2184
2185 static void *lprocfs_stats_seq_next(struct seq_file *p, void *v, loff_t *pos)
2186 {
2187         (*pos)++;
2188
2189         return lprocfs_stats_seq_start(p, pos);
2190 }
2191
2192 /* seq file export of one lprocfs counter */
2193 static int lprocfs_stats_seq_show(struct seq_file *p, void *v)
2194 {
2195         struct lprocfs_stats            *stats  = p->private;
2196         struct lprocfs_counter_header   *hdr;
2197         struct lprocfs_counter           ctr;
2198         int                              idx    = *(loff_t *)v;
2199         int                              rc     = 0;
2200
2201         if (idx == 0) {
2202                 struct timeval now;
2203
2204                 do_gettimeofday(&now);
2205                 rc = seq_printf(p, "%-25s %lu.%lu secs.usecs\n",
2206                                 "snapshot_time", now.tv_sec, now.tv_usec);
2207                 if (rc < 0)
2208                         return rc;
2209         }
2210
2211         hdr = &stats->ls_cnt_header[idx];
2212         lprocfs_stats_collect(stats, idx, &ctr);
2213
2214         if (ctr.lc_count == 0)
2215                 goto out;
2216
2217         rc = seq_printf(p, "%-25s "LPD64" samples [%s]", hdr->lc_name,
2218                         ctr.lc_count, hdr->lc_units);
2219         if (rc < 0)
2220                 goto out;
2221
2222         if ((hdr->lc_config & LPROCFS_CNTR_AVGMINMAX) && ctr.lc_count > 0) {
2223                 rc = seq_printf(p, " "LPD64" "LPD64" "LPD64,
2224                                 ctr.lc_min, ctr.lc_max, ctr.lc_sum);
2225                 if (rc < 0)
2226                         goto out;
2227                 if (hdr->lc_config & LPROCFS_CNTR_STDDEV)
2228                         rc = seq_printf(p, " "LPD64, ctr.lc_sumsquare);
2229                 if (rc < 0)
2230                         goto out;
2231         }
2232         rc = seq_printf(p, "\n");
2233 out:
2234         return (rc < 0) ? rc : 0;
2235 }
2236
2237 struct seq_operations lprocfs_stats_seq_sops = {
2238         .start  = lprocfs_stats_seq_start,
2239         .stop   = lprocfs_stats_seq_stop,
2240         .next   = lprocfs_stats_seq_next,
2241         .show   = lprocfs_stats_seq_show,
2242 };
2243
2244 static int lprocfs_stats_seq_open(struct inode *inode, struct file *file)
2245 {
2246         struct seq_file *seq;
2247         int rc;
2248
2249 #ifndef HAVE_ONLY_PROCFS_SEQ
2250         if (LPROCFS_ENTRY_CHECK(PDE(inode)))
2251                 return -ENOENT;
2252 #endif
2253         rc = seq_open(file, &lprocfs_stats_seq_sops);
2254         if (rc)
2255                 return rc;
2256         seq = file->private_data;
2257         seq->private = PDE_DATA(inode);
2258         return 0;
2259 }
2260
2261 struct file_operations lprocfs_stats_seq_fops = {
2262         .owner   = THIS_MODULE,
2263         .open    = lprocfs_stats_seq_open,
2264         .read    = seq_read,
2265         .write   = lprocfs_stats_seq_write,
2266         .llseek  = seq_lseek,
2267         .release = lprocfs_seq_release,
2268 };
2269
2270 int lprocfs_register_stats(struct proc_dir_entry *root, const char *name,
2271                            struct lprocfs_stats *stats)
2272 {
2273         struct proc_dir_entry *entry;
2274         LASSERT(root != NULL);
2275
2276         entry = proc_create_data(name, 0644, root,
2277                                  &lprocfs_stats_seq_fops, stats);
2278         if (entry == NULL)
2279                 return -ENOMEM;
2280         return 0;
2281 }
2282 EXPORT_SYMBOL(lprocfs_register_stats);
2283
2284 void lprocfs_counter_init(struct lprocfs_stats *stats, int index,
2285                           unsigned conf, const char *name, const char *units)
2286 {
2287         struct lprocfs_counter_header   *header;
2288         struct lprocfs_counter          *percpu_cntr;
2289         unsigned long                   flags = 0;
2290         unsigned int                    i;
2291         unsigned int                    num_cpu;
2292
2293         LASSERT(stats != NULL);
2294
2295         header = &stats->ls_cnt_header[index];
2296         LASSERTF(header != NULL, "Failed to allocate stats header:[%d]%s/%s\n",
2297                  index, name, units);
2298
2299         header->lc_config = conf;
2300         header->lc_name   = name;
2301         header->lc_units  = units;
2302
2303         num_cpu = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
2304         for (i = 0; i < num_cpu; ++i) {
2305                 if (stats->ls_percpu[i] == NULL)
2306                         continue;
2307                 percpu_cntr = lprocfs_stats_counter_get(stats, i, index);
2308                 percpu_cntr->lc_count           = 0;
2309                 percpu_cntr->lc_min             = LC_MIN_INIT;
2310                 percpu_cntr->lc_max             = 0;
2311                 percpu_cntr->lc_sumsquare       = 0;
2312                 percpu_cntr->lc_sum             = 0;
2313                 if ((stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0)
2314                         percpu_cntr->lc_sum_irq = 0;
2315         }
2316         lprocfs_stats_unlock(stats, LPROCFS_GET_NUM_CPU, &flags);
2317 }
2318 EXPORT_SYMBOL(lprocfs_counter_init);
2319
2320 #define LPROCFS_OBD_OP_INIT(base, stats, op)                               \
2321 do {                                                                       \
2322         unsigned int coffset = base + OBD_COUNTER_OFFSET(op);              \
2323         LASSERT(coffset < stats->ls_num);                                  \
2324         lprocfs_counter_init(stats, coffset, 0, #op, "reqs");              \
2325 } while (0)
2326
2327 void lprocfs_init_ops_stats(int num_private_stats, struct lprocfs_stats *stats)
2328 {
2329         LPROCFS_OBD_OP_INIT(num_private_stats, stats, iocontrol);
2330         LPROCFS_OBD_OP_INIT(num_private_stats, stats, get_info);
2331         LPROCFS_OBD_OP_INIT(num_private_stats, stats, set_info_async);
2332         LPROCFS_OBD_OP_INIT(num_private_stats, stats, attach);
2333         LPROCFS_OBD_OP_INIT(num_private_stats, stats, detach);
2334         LPROCFS_OBD_OP_INIT(num_private_stats, stats, setup);
2335         LPROCFS_OBD_OP_INIT(num_private_stats, stats, precleanup);
2336         LPROCFS_OBD_OP_INIT(num_private_stats, stats, cleanup);
2337         LPROCFS_OBD_OP_INIT(num_private_stats, stats, process_config);
2338         LPROCFS_OBD_OP_INIT(num_private_stats, stats, postrecov);
2339         LPROCFS_OBD_OP_INIT(num_private_stats, stats, add_conn);
2340         LPROCFS_OBD_OP_INIT(num_private_stats, stats, del_conn);
2341         LPROCFS_OBD_OP_INIT(num_private_stats, stats, connect);
2342         LPROCFS_OBD_OP_INIT(num_private_stats, stats, reconnect);
2343         LPROCFS_OBD_OP_INIT(num_private_stats, stats, disconnect);
2344         LPROCFS_OBD_OP_INIT(num_private_stats, stats, fid_init);
2345         LPROCFS_OBD_OP_INIT(num_private_stats, stats, fid_fini);
2346         LPROCFS_OBD_OP_INIT(num_private_stats, stats, fid_alloc);
2347         LPROCFS_OBD_OP_INIT(num_private_stats, stats, statfs);
2348         LPROCFS_OBD_OP_INIT(num_private_stats, stats, statfs_async);
2349         LPROCFS_OBD_OP_INIT(num_private_stats, stats, packmd);
2350         LPROCFS_OBD_OP_INIT(num_private_stats, stats, unpackmd);
2351         LPROCFS_OBD_OP_INIT(num_private_stats, stats, create);
2352         LPROCFS_OBD_OP_INIT(num_private_stats, stats, create_async);
2353         LPROCFS_OBD_OP_INIT(num_private_stats, stats, destroy);
2354         LPROCFS_OBD_OP_INIT(num_private_stats, stats, setattr);
2355         LPROCFS_OBD_OP_INIT(num_private_stats, stats, setattr_async);
2356         LPROCFS_OBD_OP_INIT(num_private_stats, stats, getattr);
2357         LPROCFS_OBD_OP_INIT(num_private_stats, stats, getattr_async);
2358         LPROCFS_OBD_OP_INIT(num_private_stats, stats, preprw);
2359         LPROCFS_OBD_OP_INIT(num_private_stats, stats, commitrw);
2360         LPROCFS_OBD_OP_INIT(num_private_stats, stats, change_cbdata);
2361         LPROCFS_OBD_OP_INIT(num_private_stats, stats, find_cbdata);
2362         LPROCFS_OBD_OP_INIT(num_private_stats, stats, init_export);
2363         LPROCFS_OBD_OP_INIT(num_private_stats, stats, destroy_export);
2364         LPROCFS_OBD_OP_INIT(num_private_stats, stats, llog_init);
2365         LPROCFS_OBD_OP_INIT(num_private_stats, stats, llog_connect);
2366         LPROCFS_OBD_OP_INIT(num_private_stats, stats, llog_finish);
2367         LPROCFS_OBD_OP_INIT(num_private_stats, stats, pin);
2368         LPROCFS_OBD_OP_INIT(num_private_stats, stats, unpin);
2369         LPROCFS_OBD_OP_INIT(num_private_stats, stats, import_event);
2370         LPROCFS_OBD_OP_INIT(num_private_stats, stats, notify);
2371         LPROCFS_OBD_OP_INIT(num_private_stats, stats, health_check);
2372         LPROCFS_OBD_OP_INIT(num_private_stats, stats, get_uuid);
2373         LPROCFS_OBD_OP_INIT(num_private_stats, stats, quotacheck);
2374         LPROCFS_OBD_OP_INIT(num_private_stats, stats, quotactl);
2375         LPROCFS_OBD_OP_INIT(num_private_stats, stats, ping);
2376         LPROCFS_OBD_OP_INIT(num_private_stats, stats, pool_new);
2377         LPROCFS_OBD_OP_INIT(num_private_stats, stats, pool_rem);
2378         LPROCFS_OBD_OP_INIT(num_private_stats, stats, pool_add);
2379         LPROCFS_OBD_OP_INIT(num_private_stats, stats, pool_del);
2380         LPROCFS_OBD_OP_INIT(num_private_stats, stats, getref);
2381         LPROCFS_OBD_OP_INIT(num_private_stats, stats, putref);
2382
2383         CLASSERT(NUM_OBD_STATS == OBD_COUNTER_OFFSET(putref) + 1);
2384 }
2385 EXPORT_SYMBOL(lprocfs_init_ops_stats);
2386
2387 int lprocfs_alloc_obd_stats(struct obd_device *obd, unsigned num_private_stats)
2388 {
2389         struct lprocfs_stats *stats;
2390         unsigned int num_stats;
2391         int rc, i;
2392
2393         LASSERT(obd->obd_stats == NULL);
2394         LASSERT(obd->obd_proc_entry != NULL);
2395         LASSERT(obd->obd_cntr_base == 0);
2396
2397         num_stats = NUM_OBD_STATS + num_private_stats;
2398         stats = lprocfs_alloc_stats(num_stats, 0);
2399         if (stats == NULL)
2400                 return -ENOMEM;
2401
2402         lprocfs_init_ops_stats(num_private_stats, stats);
2403
2404         for (i = num_private_stats; i < num_stats; i++) {
2405                 /* If this LBUGs, it is likely that an obd
2406                  * operation was added to struct obd_ops in
2407                  * <obd.h>, and that the corresponding line item
2408                  * LPROCFS_OBD_OP_INIT(.., .., opname)
2409                  * is missing from the list above. */
2410                 LASSERTF(stats->ls_cnt_header[i].lc_name != NULL,
2411                          "Missing obd_stat initializer obd_op "
2412                          "operation at offset %d.\n", i - num_private_stats);
2413         }
2414         rc = lprocfs_register_stats(obd->obd_proc_entry, "stats", stats);
2415         if (rc < 0) {
2416                 lprocfs_free_stats(&stats);
2417         } else {
2418                 obd->obd_stats  = stats;
2419                 obd->obd_cntr_base = num_private_stats;
2420         }
2421         return rc;
2422 }
2423 EXPORT_SYMBOL(lprocfs_alloc_obd_stats);
2424
2425 void lprocfs_free_obd_stats(struct obd_device *obd)
2426 {
2427         if (obd->obd_stats)
2428                 lprocfs_free_stats(&obd->obd_stats);
2429 }
2430 EXPORT_SYMBOL(lprocfs_free_obd_stats);
2431
2432 /* Note that we only init md counters for ops whose offset is less
2433  * than NUM_MD_STATS. This is explained in a comment in the definition
2434  * of struct md_ops. */
2435 #define LPROCFS_MD_OP_INIT(base, stats, op)                                    \
2436         do {                                                                   \
2437                 unsigned int _idx = base + MD_COUNTER_OFFSET(op);              \
2438                                                                                \
2439                 if (MD_COUNTER_OFFSET(op) < NUM_MD_STATS) {                    \
2440                         LASSERT(_idx < stats->ls_num);                         \
2441                         lprocfs_counter_init(stats, _idx, 0, #op, "reqs");     \
2442                 }                                                              \
2443         } while (0)
2444
2445 void lprocfs_init_mps_stats(int num_private_stats, struct lprocfs_stats *stats)
2446 {
2447         LPROCFS_MD_OP_INIT(num_private_stats, stats, getstatus);
2448         LPROCFS_MD_OP_INIT(num_private_stats, stats, null_inode);
2449         LPROCFS_MD_OP_INIT(num_private_stats, stats, find_cbdata);
2450         LPROCFS_MD_OP_INIT(num_private_stats, stats, close);
2451         LPROCFS_MD_OP_INIT(num_private_stats, stats, create);
2452         LPROCFS_MD_OP_INIT(num_private_stats, stats, done_writing);
2453         LPROCFS_MD_OP_INIT(num_private_stats, stats, enqueue);
2454         LPROCFS_MD_OP_INIT(num_private_stats, stats, getattr);
2455         LPROCFS_MD_OP_INIT(num_private_stats, stats, getattr_name);
2456         LPROCFS_MD_OP_INIT(num_private_stats, stats, intent_lock);
2457         LPROCFS_MD_OP_INIT(num_private_stats, stats, link);
2458         LPROCFS_MD_OP_INIT(num_private_stats, stats, rename);
2459         LPROCFS_MD_OP_INIT(num_private_stats, stats, is_subdir);
2460         LPROCFS_MD_OP_INIT(num_private_stats, stats, setattr);
2461         LPROCFS_MD_OP_INIT(num_private_stats, stats, fsync);
2462         LPROCFS_MD_OP_INIT(num_private_stats, stats, readpage);
2463         LPROCFS_MD_OP_INIT(num_private_stats, stats, read_entry);
2464         LPROCFS_MD_OP_INIT(num_private_stats, stats, unlink);
2465         LPROCFS_MD_OP_INIT(num_private_stats, stats, setxattr);
2466         LPROCFS_MD_OP_INIT(num_private_stats, stats, getxattr);
2467         LPROCFS_MD_OP_INIT(num_private_stats, stats, init_ea_size);
2468         LPROCFS_MD_OP_INIT(num_private_stats, stats, get_lustre_md);
2469         LPROCFS_MD_OP_INIT(num_private_stats, stats, free_lustre_md);
2470         LPROCFS_MD_OP_INIT(num_private_stats, stats, update_lsm_md);
2471         LPROCFS_MD_OP_INIT(num_private_stats, stats, merge_attr);
2472         LPROCFS_MD_OP_INIT(num_private_stats, stats, set_open_replay_data);
2473         LPROCFS_MD_OP_INIT(num_private_stats, stats, clear_open_replay_data);
2474         LPROCFS_MD_OP_INIT(num_private_stats, stats, set_lock_data);
2475         LPROCFS_MD_OP_INIT(num_private_stats, stats, lock_match);
2476         LPROCFS_MD_OP_INIT(num_private_stats, stats, cancel_unused);
2477         LPROCFS_MD_OP_INIT(num_private_stats, stats, renew_capa);
2478         LPROCFS_MD_OP_INIT(num_private_stats, stats, unpack_capa);
2479         LPROCFS_MD_OP_INIT(num_private_stats, stats, get_remote_perm);
2480         LPROCFS_MD_OP_INIT(num_private_stats, stats, intent_getattr_async);
2481         LPROCFS_MD_OP_INIT(num_private_stats, stats, revalidate_lock);
2482 }
2483 EXPORT_SYMBOL(lprocfs_init_mps_stats);
2484
2485 int lprocfs_alloc_md_stats(struct obd_device *obd,
2486                            unsigned int num_private_stats)
2487 {
2488         struct lprocfs_stats *stats;
2489         unsigned int num_stats;
2490         int rc, i;
2491
2492         CLASSERT(offsetof(struct md_ops, MD_STATS_FIRST_OP) == 0);
2493         CLASSERT(_MD_COUNTER_OFFSET(MD_STATS_FIRST_OP) == 0);
2494         CLASSERT(_MD_COUNTER_OFFSET(MD_STATS_LAST_OP) > 0);
2495
2496         /* TODO Ensure that this function is only used where
2497          * appropriate by adding an assertion to the effect that
2498          * obd->obd_type->typ_md_ops is not NULL. We can't do this now
2499          * because mdt_procfs_init() uses this function to allocate
2500          * the stats backing /proc/fs/lustre/mdt/.../md_stats but the
2501          * mdt layer does not use the md_ops interface. This is
2502          * confusing and a waste of memory. See LU-2484.
2503          */
2504         LASSERT(obd->obd_proc_entry != NULL);
2505         LASSERT(obd->obd_md_stats == NULL);
2506         LASSERT(obd->obd_md_cntr_base == 0);
2507
2508         num_stats = NUM_MD_STATS + num_private_stats;
2509         stats = lprocfs_alloc_stats(num_stats, 0);
2510         if (stats == NULL)
2511                 return -ENOMEM;
2512
2513         lprocfs_init_mps_stats(num_private_stats, stats);
2514
2515         for (i = num_private_stats; i < num_stats; i++) {
2516                 if (stats->ls_cnt_header[i].lc_name == NULL) {
2517                         CERROR("Missing md_stat initializer md_op "
2518                                "operation at offset %d. Aborting.\n",
2519                                i - num_private_stats);
2520                         LBUG();
2521                 }
2522         }
2523
2524         rc = lprocfs_register_stats(obd->obd_proc_entry, "md_stats", stats);
2525         if (rc < 0) {
2526                 lprocfs_free_stats(&stats);
2527         } else {
2528                 obd->obd_md_stats = stats;
2529                 obd->obd_md_cntr_base = num_private_stats;
2530         }
2531
2532         return rc;
2533 }
2534 EXPORT_SYMBOL(lprocfs_alloc_md_stats);
2535
2536 void lprocfs_free_md_stats(struct obd_device *obd)
2537 {
2538         struct lprocfs_stats *stats = obd->obd_md_stats;
2539
2540         if (stats != NULL) {
2541                 obd->obd_md_stats = NULL;
2542                 obd->obd_md_cntr_base = 0;
2543                 lprocfs_free_stats(&stats);
2544         }
2545 }
2546 EXPORT_SYMBOL(lprocfs_free_md_stats);
2547
2548 void lprocfs_init_ldlm_stats(struct lprocfs_stats *ldlm_stats)
2549 {
2550         lprocfs_counter_init(ldlm_stats,
2551                              LDLM_ENQUEUE - LDLM_FIRST_OPC,
2552                              0, "ldlm_enqueue", "reqs");
2553         lprocfs_counter_init(ldlm_stats,
2554                              LDLM_CONVERT - LDLM_FIRST_OPC,
2555                              0, "ldlm_convert", "reqs");
2556         lprocfs_counter_init(ldlm_stats,
2557                              LDLM_CANCEL - LDLM_FIRST_OPC,
2558                              0, "ldlm_cancel", "reqs");
2559         lprocfs_counter_init(ldlm_stats,
2560                              LDLM_BL_CALLBACK - LDLM_FIRST_OPC,
2561                              0, "ldlm_bl_callback", "reqs");
2562         lprocfs_counter_init(ldlm_stats,
2563                              LDLM_CP_CALLBACK - LDLM_FIRST_OPC,
2564                              0, "ldlm_cp_callback", "reqs");
2565         lprocfs_counter_init(ldlm_stats,
2566                              LDLM_GL_CALLBACK - LDLM_FIRST_OPC,
2567                              0, "ldlm_gl_callback", "reqs");
2568 }
2569 EXPORT_SYMBOL(lprocfs_init_ldlm_stats);
2570
2571 #ifdef HAVE_SERVER_SUPPORT
2572 int lprocfs_exp_nid_seq_show(struct seq_file *m, void *data)
2573 {
2574         struct obd_export *exp = m->private;
2575         LASSERT(exp != NULL);
2576         return seq_printf(m, "%s\n", obd_export_nid2str(exp));
2577 }
2578
2579 int lprocfs_exp_print_uuid_seq(cfs_hash_t *hs, cfs_hash_bd_t *bd,
2580                                 cfs_hlist_node_t *hnode, void *cb_data)
2581
2582 {
2583         struct obd_export *exp = cfs_hash_object(hs, hnode);
2584         struct seq_file *m = cb_data;
2585
2586         if (exp->exp_nid_stats)
2587                 seq_printf(m, "%s\n", obd_uuid2str(&exp->exp_client_uuid));
2588         return 0;
2589 }
2590
2591 int lprocfs_exp_uuid_seq_show(struct seq_file *m, void *data)
2592 {
2593         struct nid_stat *stats = m->private;
2594         struct obd_device *obd = stats->nid_obd;
2595
2596         cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
2597                                 lprocfs_exp_print_uuid_seq, m);
2598         return 0;
2599 }
2600 LPROC_SEQ_FOPS_RO(lprocfs_exp_uuid);
2601
2602 int lprocfs_exp_print_hash_seq(cfs_hash_t *hs, cfs_hash_bd_t *bd,
2603                                 cfs_hlist_node_t *hnode, void *cb_data)
2604
2605 {
2606         struct seq_file *m = cb_data;
2607         struct obd_export *exp = cfs_hash_object(hs, hnode);
2608
2609         if (exp->exp_lock_hash != NULL) {
2610                 cfs_hash_debug_header_seq(m);
2611                 cfs_hash_debug_str_seq(hs, m);
2612         }
2613         return 0;
2614 }
2615
2616 int lprocfs_exp_hash_seq_show(struct seq_file *m, void *data)
2617 {
2618         struct nid_stat *stats = m->private;
2619         struct obd_device *obd = stats->nid_obd;
2620
2621         cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
2622                                 lprocfs_exp_print_hash_seq, m);
2623         return 0;
2624 }
2625 LPROC_SEQ_FOPS_RO(lprocfs_exp_hash);
2626
2627 int lprocfs_nid_stats_clear_seq_show(struct seq_file *m, void *data)
2628 {
2629         return seq_printf(m, "%s\n", "Write into this file to clear all nid "
2630                                 "stats and stale nid entries");
2631 }
2632 EXPORT_SYMBOL(lprocfs_nid_stats_clear_seq_show);
2633
2634 static int lprocfs_nid_stats_clear_write_cb(void *obj, void *data)
2635 {
2636         struct nid_stat *stat = obj;
2637         ENTRY;
2638
2639         CDEBUG(D_INFO,"refcnt %d\n", atomic_read(&stat->nid_exp_ref_count));
2640         if (atomic_read(&stat->nid_exp_ref_count) == 1) {
2641                 /* object has only hash references. */
2642                 spin_lock(&stat->nid_obd->obd_nid_lock);
2643                 cfs_list_move(&stat->nid_list, data);
2644                 spin_unlock(&stat->nid_obd->obd_nid_lock);
2645                 RETURN(1);
2646         }
2647         /* we has reference to object - only clear data*/
2648         if (stat->nid_stats)
2649                 lprocfs_clear_stats(stat->nid_stats);
2650
2651         RETURN(0);
2652 }
2653
2654 ssize_t
2655 lprocfs_nid_stats_clear_seq_write(struct file *file, const char *buffer,
2656                                         size_t count, loff_t *off)
2657 {
2658         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
2659         struct nid_stat *client_stat;
2660         CFS_LIST_HEAD(free_list);
2661
2662         cfs_hash_cond_del(obd->obd_nid_stats_hash,
2663                                 lprocfs_nid_stats_clear_write_cb, &free_list);
2664
2665         while (!cfs_list_empty(&free_list)) {
2666                 client_stat = cfs_list_entry(free_list.next, struct nid_stat,
2667                                                 nid_list);
2668                 cfs_list_del_init(&client_stat->nid_list);
2669                 lprocfs_free_client_stats(client_stat);
2670         }
2671         return count;
2672 }
2673 EXPORT_SYMBOL(lprocfs_nid_stats_clear_seq_write);
2674
2675 #ifndef HAVE_ONLY_PROCFS_SEQ
2676 int lprocfs_exp_rd_nid(char *page, char **start, off_t off, int count,
2677                          int *eof,  void *data)
2678 {
2679         struct obd_export *exp = data;
2680         LASSERT(exp != NULL);
2681         *eof = 1;
2682         return snprintf(page, count, "%s\n", obd_export_nid2str(exp));
2683 }
2684
2685 struct exp_uuid_cb_data {
2686         char                   *page;
2687         int                     count;
2688         int                    *eof;
2689         int                    *len;
2690 };
2691
2692 static void
2693 lprocfs_exp_rd_cb_data_init(struct exp_uuid_cb_data *cb_data, char *page,
2694                             int count, int *eof, int *len)
2695 {
2696         cb_data->page = page;
2697         cb_data->count = count;
2698         cb_data->eof = eof;
2699         cb_data->len = len;
2700 }
2701
2702 int lprocfs_exp_print_uuid(cfs_hash_t *hs, cfs_hash_bd_t *bd,
2703                            cfs_hlist_node_t *hnode, void *cb_data)
2704
2705 {
2706         struct obd_export *exp = cfs_hash_object(hs, hnode);
2707         struct exp_uuid_cb_data *data = (struct exp_uuid_cb_data *)cb_data;
2708
2709         if (exp->exp_nid_stats)
2710                 *data->len += snprintf((data->page + *data->len),
2711                                        data->count, "%s\n",
2712                                        obd_uuid2str(&exp->exp_client_uuid));
2713         return 0;
2714 }
2715
2716 int lprocfs_exp_rd_uuid(char *page, char **start, off_t off, int count,
2717                         int *eof,  void *data)
2718 {
2719         struct nid_stat *stats = (struct nid_stat *)data;
2720         struct exp_uuid_cb_data cb_data;
2721         struct obd_device *obd = stats->nid_obd;
2722         int len = 0;
2723
2724         *eof = 1;
2725         page[0] = '\0';
2726         lprocfs_exp_rd_cb_data_init(&cb_data, page, count, eof, &len);
2727         cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
2728                               lprocfs_exp_print_uuid, &cb_data);
2729         return (*cb_data.len);
2730 }
2731
2732 int lprocfs_exp_print_hash(cfs_hash_t *hs, cfs_hash_bd_t *bd,
2733                            cfs_hlist_node_t *hnode, void *cb_data)
2734
2735 {
2736         struct exp_uuid_cb_data *data = cb_data;
2737         struct obd_export       *exp = cfs_hash_object(hs, hnode);
2738
2739         if (exp->exp_lock_hash != NULL) {
2740                 if (!*data->len) {
2741                         *data->len += cfs_hash_debug_header(data->page,
2742                                                             data->count);
2743                 }
2744                 *data->len += cfs_hash_debug_str(hs, data->page + *data->len,
2745                                                  data->count);
2746         }
2747
2748         return 0;
2749 }
2750
2751 int lprocfs_exp_rd_hash(char *page, char **start, off_t off, int count,
2752                         int *eof,  void *data)
2753 {
2754         struct nid_stat *stats = (struct nid_stat *)data;
2755         struct exp_uuid_cb_data cb_data;
2756         struct obd_device *obd = stats->nid_obd;
2757         int len = 0;
2758
2759         *eof = 1;
2760         page[0] = '\0';
2761         lprocfs_exp_rd_cb_data_init(&cb_data, page, count, eof, &len);
2762
2763         cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
2764                               lprocfs_exp_print_hash, &cb_data);
2765         return (*cb_data.len);
2766 }
2767
2768 int lprocfs_nid_stats_clear_read(char *page, char **start, off_t off,
2769                                         int count, int *eof,  void *data)
2770 {
2771         *eof = 1;
2772         return snprintf(page, count, "%s\n",
2773                         "Write into this file to clear all nid stats and "
2774                         "stale nid entries");
2775 }
2776 EXPORT_SYMBOL(lprocfs_nid_stats_clear_read);
2777
2778 int lprocfs_nid_stats_clear_write(struct file *file, const char *buffer,
2779                                   unsigned long count, void *data)
2780 {
2781         struct obd_device *obd = (struct obd_device *)data;
2782         struct nid_stat *client_stat;
2783         CFS_LIST_HEAD(free_list);
2784
2785         cfs_hash_cond_del(obd->obd_nid_stats_hash,
2786                           lprocfs_nid_stats_clear_write_cb, &free_list);
2787
2788         while (!cfs_list_empty(&free_list)) {
2789                 client_stat = cfs_list_entry(free_list.next, struct nid_stat,
2790                                              nid_list);
2791                 cfs_list_del_init(&client_stat->nid_list);
2792                 lprocfs_free_client_stats(client_stat);
2793         }
2794
2795         return count;
2796 }
2797 EXPORT_SYMBOL(lprocfs_nid_stats_clear_write);
2798 #endif
2799
2800 int lprocfs_exp_setup(struct obd_export *exp, lnet_nid_t *nid, int *newnid)
2801 {
2802         struct nid_stat *new_stat, *old_stat;
2803         struct obd_device *obd = NULL;
2804         cfs_proc_dir_entry_t *entry;
2805         char *buffer = NULL;
2806         int rc = 0;
2807         ENTRY;
2808
2809         *newnid = 0;
2810
2811         if (!exp || !exp->exp_obd || !exp->exp_obd->obd_proc_exports_entry ||
2812             !exp->exp_obd->obd_nid_stats_hash)
2813                 RETURN(-EINVAL);
2814
2815         /* not test against zero because eric say:
2816          * You may only test nid against another nid, or LNET_NID_ANY.
2817          * Anything else is nonsense.*/
2818         if (!nid || *nid == LNET_NID_ANY)
2819                 RETURN(0);
2820
2821         spin_lock(&exp->exp_lock);
2822         if (exp->exp_nid_stats != NULL) {
2823                 spin_unlock(&exp->exp_lock);
2824                 RETURN(-EALREADY);
2825         }
2826         spin_unlock(&exp->exp_lock);
2827
2828         obd = exp->exp_obd;
2829
2830         CDEBUG(D_CONFIG, "using hash %p\n", obd->obd_nid_stats_hash);
2831
2832         OBD_ALLOC_PTR(new_stat);
2833         if (new_stat == NULL)
2834                 RETURN(-ENOMEM);
2835
2836         new_stat->nid               = *nid;
2837         new_stat->nid_obd           = exp->exp_obd;
2838         /* we need set default refcount to 1 to balance obd_disconnect */
2839         atomic_set(&new_stat->nid_exp_ref_count, 1);
2840
2841         old_stat = cfs_hash_findadd_unique(obd->obd_nid_stats_hash,
2842                                            nid, &new_stat->nid_hash);
2843         CDEBUG(D_INFO, "Found stats %p for nid %s - ref %d\n",
2844                old_stat, libcfs_nid2str(*nid),
2845                atomic_read(&new_stat->nid_exp_ref_count));
2846
2847         /* Return -EALREADY here so that we know that the /proc
2848          * entry already has been created */
2849         if (old_stat != new_stat) {
2850                 spin_lock(&exp->exp_lock);
2851                 if (exp->exp_nid_stats) {
2852                         LASSERT(exp->exp_nid_stats == old_stat);
2853                         nidstat_putref(exp->exp_nid_stats);
2854                 }
2855                 exp->exp_nid_stats = old_stat;
2856                 spin_unlock(&exp->exp_lock);
2857                 GOTO(destroy_new, rc = -EALREADY);
2858         }
2859         /* not found - create */
2860         OBD_ALLOC(buffer, LNET_NIDSTR_SIZE);
2861         if (buffer == NULL)
2862                 GOTO(destroy_new, rc = -ENOMEM);
2863
2864         memcpy(buffer, libcfs_nid2str(*nid), LNET_NIDSTR_SIZE);
2865 #ifndef HAVE_ONLY_PROCFS_SEQ
2866         new_stat->nid_proc = lprocfs_register(buffer,
2867                                                 obd->obd_proc_exports_entry,
2868                                                 NULL, NULL);
2869 #else
2870         new_stat->nid_proc = lprocfs_seq_register(buffer,
2871                                                 obd->obd_proc_exports_entry,
2872                                                 NULL, NULL);
2873 #endif
2874         OBD_FREE(buffer, LNET_NIDSTR_SIZE);
2875
2876         if (IS_ERR(new_stat->nid_proc)) {
2877                 rc = PTR_ERR(new_stat->nid_proc);
2878                 new_stat->nid_proc = NULL;
2879                 CERROR("%s: cannot create proc entry for export %s: rc = %d\n",
2880                        obd->obd_name, libcfs_nid2str(*nid), rc);
2881                 GOTO(destroy_new_ns, rc);
2882         }
2883
2884 #ifndef HAVE_ONLY_PROCFS_SEQ
2885         entry = lprocfs_add_simple(new_stat->nid_proc, "uuid",
2886                                    lprocfs_exp_rd_uuid, NULL, new_stat, NULL);
2887 #else
2888         entry = lprocfs_add_simple(new_stat->nid_proc, "uuid",
2889                                         new_stat, &lprocfs_exp_uuid_fops);
2890 #endif
2891         if (IS_ERR(entry)) {
2892                 CWARN("Error adding the NID stats file\n");
2893                 rc = PTR_ERR(entry);
2894                 GOTO(destroy_new_ns, rc);
2895         }
2896
2897 #ifndef HAVE_ONLY_PROCFS_SEQ
2898         entry = lprocfs_add_simple(new_stat->nid_proc, "hash",
2899                                    lprocfs_exp_rd_hash, NULL, new_stat, NULL);
2900 #else
2901         entry = lprocfs_add_simple(new_stat->nid_proc, "hash",
2902                                         new_stat, &lprocfs_exp_hash_fops);
2903 #endif
2904         if (IS_ERR(entry)) {
2905                 CWARN("Error adding the hash file\n");
2906                 rc = PTR_ERR(entry);
2907                 GOTO(destroy_new_ns, rc);
2908         }
2909
2910         spin_lock(&exp->exp_lock);
2911         exp->exp_nid_stats = new_stat;
2912         spin_unlock(&exp->exp_lock);
2913         *newnid = 1;
2914         /* protect competitive add to list, not need locking on destroy */
2915         spin_lock(&obd->obd_nid_lock);
2916         cfs_list_add(&new_stat->nid_list, &obd->obd_nid_stats);
2917         spin_unlock(&obd->obd_nid_lock);
2918
2919         RETURN(rc);
2920
2921 destroy_new_ns:
2922         if (new_stat->nid_proc != NULL)
2923                 lprocfs_remove(&new_stat->nid_proc);
2924         cfs_hash_del(obd->obd_nid_stats_hash, nid, &new_stat->nid_hash);
2925
2926 destroy_new:
2927         nidstat_putref(new_stat);
2928         OBD_FREE_PTR(new_stat);
2929         RETURN(rc);
2930 }
2931 EXPORT_SYMBOL(lprocfs_exp_setup);
2932 #endif
2933
2934 int lprocfs_exp_cleanup(struct obd_export *exp)
2935 {
2936         struct nid_stat *stat = exp->exp_nid_stats;
2937
2938         if(!stat || !exp->exp_obd)
2939                 RETURN(0);
2940
2941         nidstat_putref(exp->exp_nid_stats);
2942         exp->exp_nid_stats = NULL;
2943
2944         return 0;
2945 }
2946 EXPORT_SYMBOL(lprocfs_exp_cleanup);
2947
2948 __s64 lprocfs_read_helper(struct lprocfs_counter *lc,
2949                           struct lprocfs_counter_header *header,
2950                           enum lprocfs_stats_flags flags,
2951                           enum lprocfs_fields_flags field)
2952 {
2953         __s64 ret = 0;
2954
2955         if (lc == NULL || header == NULL)
2956                 RETURN(0);
2957
2958         switch (field) {
2959                 case LPROCFS_FIELDS_FLAGS_CONFIG:
2960                         ret = header->lc_config;
2961                         break;
2962                 case LPROCFS_FIELDS_FLAGS_SUM:
2963                         ret = lc->lc_sum;
2964                         if ((flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0)
2965                                 ret += lc->lc_sum_irq;
2966                         break;
2967                 case LPROCFS_FIELDS_FLAGS_MIN:
2968                         ret = lc->lc_min;
2969                         break;
2970                 case LPROCFS_FIELDS_FLAGS_MAX:
2971                         ret = lc->lc_max;
2972                         break;
2973                 case LPROCFS_FIELDS_FLAGS_AVG:
2974                         ret = (lc->lc_max - lc->lc_min) / 2;
2975                         break;
2976                 case LPROCFS_FIELDS_FLAGS_SUMSQUARE:
2977                         ret = lc->lc_sumsquare;
2978                         break;
2979                 case LPROCFS_FIELDS_FLAGS_COUNT:
2980                         ret = lc->lc_count;
2981                         break;
2982                 default:
2983                         break;
2984         };
2985         RETURN(ret);
2986 }
2987 EXPORT_SYMBOL(lprocfs_read_helper);
2988
2989 int lprocfs_write_helper(const char *buffer, unsigned long count,
2990                          int *val)
2991 {
2992         return lprocfs_write_frac_helper(buffer, count, val, 1);
2993 }
2994 EXPORT_SYMBOL(lprocfs_write_helper);
2995
2996 int lprocfs_write_frac_helper(const char *buffer, unsigned long count,
2997                               int *val, int mult)
2998 {
2999         char kernbuf[20], *end, *pbuf;
3000
3001         if (count > (sizeof(kernbuf) - 1))
3002                 return -EINVAL;
3003
3004         if (copy_from_user(kernbuf, buffer, count))
3005                 return -EFAULT;
3006
3007         kernbuf[count] = '\0';
3008         pbuf = kernbuf;
3009         if (*pbuf == '-') {
3010                 mult = -mult;
3011                 pbuf++;
3012         }
3013
3014         *val = (int)simple_strtoul(pbuf, &end, 10) * mult;
3015         if (pbuf == end)
3016                 return -EINVAL;
3017
3018         if (end != NULL && *end == '.') {
3019                 int temp_val, pow = 1;
3020                 int i;
3021
3022                 pbuf = end + 1;
3023                 if (strlen(pbuf) > 5)
3024                         pbuf[5] = '\0'; /*only allow 5bits fractional*/
3025
3026                 temp_val = (int)simple_strtoul(pbuf, &end, 10) * mult;
3027
3028                 if (pbuf < end) {
3029                         for (i = 0; i < (end - pbuf); i++)
3030                                 pow *= 10;
3031
3032                         *val += temp_val / pow;
3033                 }
3034         }
3035         return 0;
3036 }
3037 EXPORT_SYMBOL(lprocfs_write_frac_helper);
3038
3039 int lprocfs_read_frac_helper(char *buffer, unsigned long count, long val,
3040                              int mult)
3041 {
3042         long decimal_val, frac_val;
3043         int prtn;
3044
3045         if (count < 10)
3046                 return -EINVAL;
3047
3048         decimal_val = val / mult;
3049         prtn = snprintf(buffer, count, "%ld", decimal_val);
3050         frac_val = val % mult;
3051
3052         if (prtn < (count - 4) && frac_val > 0) {
3053                 long temp_frac;
3054                 int i, temp_mult = 1, frac_bits = 0;
3055
3056                 temp_frac = frac_val * 10;
3057                 buffer[prtn++] = '.';
3058                 while (frac_bits < 2 && (temp_frac / mult) < 1 ) {
3059                         /* only reserved 2 bits fraction */
3060                         buffer[prtn++] ='0';
3061                         temp_frac *= 10;
3062                         frac_bits++;
3063                 }
3064                 /*
3065                  * Need to think these cases :
3066                  *      1. #echo x.00 > /proc/xxx       output result : x
3067                  *      2. #echo x.0x > /proc/xxx       output result : x.0x
3068                  *      3. #echo x.x0 > /proc/xxx       output result : x.x
3069                  *      4. #echo x.xx > /proc/xxx       output result : x.xx
3070                  *      Only reserved 2 bits fraction.
3071                  */
3072                 for (i = 0; i < (5 - prtn); i++)
3073                         temp_mult *= 10;
3074
3075                 frac_bits = min((int)count - prtn, 3 - frac_bits);
3076                 prtn += snprintf(buffer + prtn, frac_bits, "%ld",
3077                                  frac_val * temp_mult / mult);
3078
3079                 prtn--;
3080                 while(buffer[prtn] < '1' || buffer[prtn] > '9') {
3081                         prtn--;
3082                         if (buffer[prtn] == '.') {
3083                                 prtn--;
3084                                 break;
3085                         }
3086                 }
3087                 prtn++;
3088         }
3089         buffer[prtn++] ='\n';
3090         return prtn;
3091 }
3092 EXPORT_SYMBOL(lprocfs_read_frac_helper);
3093
3094 int lprocfs_seq_read_frac_helper(struct seq_file *m, long val, int mult)
3095 {
3096         long decimal_val, frac_val;
3097
3098         decimal_val = val / mult;
3099         seq_printf(m, "%ld", decimal_val);
3100         frac_val = val % mult;
3101
3102         if (frac_val > 0) {
3103                 frac_val *= 100;
3104                 frac_val /= mult;
3105         }
3106         if (frac_val > 0) {
3107                 /* Three cases: x0, xx, 0x */
3108                 if ((frac_val % 10) != 0)
3109                         seq_printf(m, ".%ld", frac_val);
3110                 else
3111                         seq_printf(m, ".%ld", frac_val / 10);
3112         }
3113
3114         seq_printf(m, "\n");
3115         return 0;
3116 }
3117 EXPORT_SYMBOL(lprocfs_seq_read_frac_helper);
3118
3119 int lprocfs_write_u64_helper(const char *buffer, unsigned long count,__u64 *val)
3120 {
3121         return lprocfs_write_frac_u64_helper(buffer, count, val, 1);
3122 }
3123 EXPORT_SYMBOL(lprocfs_write_u64_helper);
3124
3125 int lprocfs_write_frac_u64_helper(const char *buffer, unsigned long count,
3126                               __u64 *val, int mult)
3127 {
3128         char kernbuf[22], *end, *pbuf;
3129         __u64 whole, frac = 0, units;
3130         unsigned frac_d = 1;
3131
3132         if (count > (sizeof(kernbuf) - 1))
3133                 return -EINVAL;
3134
3135         if (copy_from_user(kernbuf, buffer, count))
3136                 return -EFAULT;
3137
3138         kernbuf[count] = '\0';
3139         pbuf = kernbuf;
3140         if (*pbuf == '-') {
3141                 mult = -mult;
3142                 pbuf++;
3143         }
3144
3145         whole = simple_strtoull(pbuf, &end, 10);
3146         if (pbuf == end)
3147                 return -EINVAL;
3148
3149         if (end != NULL && *end == '.') {
3150                 int i;
3151                 pbuf = end + 1;
3152
3153                 /* need to limit frac_d to a __u32 */
3154                 if (strlen(pbuf) > 10)
3155                         pbuf[10] = '\0';
3156
3157                 frac = simple_strtoull(pbuf, &end, 10);
3158                 /* count decimal places */
3159                 for (i = 0; i < (end - pbuf); i++)
3160                         frac_d *= 10;
3161         }
3162
3163         units = 1;
3164         if (end != NULL) {
3165                 switch (*end) {
3166                 case 'p': case 'P':
3167                         units <<= 10;
3168                 case 't': case 'T':
3169                         units <<= 10;
3170                 case 'g': case 'G':
3171                         units <<= 10;
3172                 case 'm': case 'M':
3173                         units <<= 10;
3174                 case 'k': case 'K':
3175                         units <<= 10;
3176                 }
3177         }
3178         /* Specified units override the multiplier */
3179         if (units)
3180                 mult = mult < 0 ? -units : units;
3181
3182         frac *= mult;
3183         do_div(frac, frac_d);
3184         *val = whole * mult + frac;
3185         return 0;
3186 }
3187 EXPORT_SYMBOL(lprocfs_write_frac_u64_helper);
3188
3189 static char *lprocfs_strnstr(const char *s1, const char *s2, size_t len)
3190 {
3191         size_t l2;
3192
3193         l2 = strlen(s2);
3194         if (!l2)
3195                 return (char *)s1;
3196         while (len >= l2) {
3197                 len--;
3198                 if (!memcmp(s1, s2, l2))
3199                         return (char *)s1;
3200                 s1++;
3201         }
3202         return NULL;
3203 }
3204
3205 /**
3206  * Find the string \a name in the input \a buffer, and return a pointer to the
3207  * value immediately following \a name, reducing \a count appropriately.
3208  * If \a name is not found the original \a buffer is returned.
3209  */
3210 char *lprocfs_find_named_value(const char *buffer, const char *name,
3211                                 size_t *count)
3212 {
3213         char *val;
3214         size_t buflen = *count;
3215
3216         /* there is no strnstr() in rhel5 and ubuntu kernels */
3217         val = lprocfs_strnstr(buffer, name, buflen);
3218         if (val == NULL)
3219                 return (char *)buffer;
3220
3221         val += strlen(name);                             /* skip prefix */
3222         while (val < buffer + buflen && isspace(*val)) /* skip separator */
3223                 val++;
3224
3225         *count = 0;
3226         while (val < buffer + buflen && isalnum(*val)) {
3227                 ++*count;
3228                 ++val;
3229         }
3230
3231         return val - *count;
3232 }
3233 EXPORT_SYMBOL(lprocfs_find_named_value);
3234
3235 int lprocfs_seq_create(cfs_proc_dir_entry_t *parent,
3236                        const char *name,
3237                        mode_t mode,
3238                        const struct file_operations *seq_fops,
3239                        void *data)
3240 {
3241         struct proc_dir_entry *entry;
3242         ENTRY;
3243
3244         /* Disallow secretly (un)writable entries. */
3245         LASSERT((seq_fops->write == NULL) == ((mode & 0222) == 0));
3246
3247         entry = proc_create_data(name, mode, parent, seq_fops, data);
3248
3249         if (entry == NULL)
3250                 RETURN(-ENOMEM);
3251
3252         RETURN(0);
3253 }
3254 EXPORT_SYMBOL(lprocfs_seq_create);
3255
3256 int lprocfs_obd_seq_create(struct obd_device *dev,
3257                            const char *name,
3258                            mode_t mode,
3259                            const struct file_operations *seq_fops,
3260                            void *data)
3261 {
3262         return (lprocfs_seq_create(dev->obd_proc_entry, name,
3263                                    mode, seq_fops, data));
3264 }
3265 EXPORT_SYMBOL(lprocfs_obd_seq_create);
3266
3267 void lprocfs_oh_tally(struct obd_histogram *oh, unsigned int value)
3268 {
3269         if (value >= OBD_HIST_MAX)
3270                 value = OBD_HIST_MAX - 1;
3271
3272         spin_lock(&oh->oh_lock);
3273         oh->oh_buckets[value]++;
3274         spin_unlock(&oh->oh_lock);
3275 }
3276 EXPORT_SYMBOL(lprocfs_oh_tally);
3277
3278 void lprocfs_oh_tally_log2(struct obd_histogram *oh, unsigned int value)
3279 {
3280         unsigned int val = 0;
3281
3282         if (likely(value != 0))
3283                 val = min(fls(value - 1), OBD_HIST_MAX);
3284
3285         lprocfs_oh_tally(oh, val);
3286 }
3287 EXPORT_SYMBOL(lprocfs_oh_tally_log2);
3288
3289 unsigned long lprocfs_oh_sum(struct obd_histogram *oh)
3290 {
3291         unsigned long ret = 0;
3292         int i;
3293
3294         for (i = 0; i < OBD_HIST_MAX; i++)
3295                 ret +=  oh->oh_buckets[i];
3296         return ret;
3297 }
3298 EXPORT_SYMBOL(lprocfs_oh_sum);
3299
3300 void lprocfs_oh_clear(struct obd_histogram *oh)
3301 {
3302         spin_lock(&oh->oh_lock);
3303         memset(oh->oh_buckets, 0, sizeof(oh->oh_buckets));
3304         spin_unlock(&oh->oh_lock);
3305 }
3306 EXPORT_SYMBOL(lprocfs_oh_clear);
3307
3308 #ifdef HAVE_SERVER_SUPPORT
3309 int lprocfs_hash_seq_show(struct seq_file *m, void *data)
3310 {
3311         struct obd_device *obd = m->private;
3312         int c = 0;
3313
3314         if (obd == NULL)
3315                 return 0;
3316
3317         c += cfs_hash_debug_header_seq(m);
3318         c += cfs_hash_debug_str_seq(obd->obd_uuid_hash, m);
3319         c += cfs_hash_debug_str_seq(obd->obd_nid_hash, m);
3320         c += cfs_hash_debug_str_seq(obd->obd_nid_stats_hash, m);
3321         return c;
3322 }
3323 EXPORT_SYMBOL(lprocfs_hash_seq_show);
3324
3325 int lprocfs_recovery_status_seq_show(struct seq_file *m, void *data)
3326 {
3327         struct obd_device *obd = m->private;
3328
3329         LASSERT(obd != NULL);
3330
3331         seq_printf(m, "status: \n");
3332         if (obd->obd_max_recoverable_clients == 0) {
3333                 seq_printf(m, "INACTIVE\n");
3334                 goto out;
3335         }
3336
3337         /* sampled unlocked, but really... */
3338         if (obd->obd_recovering == 0) {
3339                 seq_printf(m, "COMPLETE\n");
3340                 seq_printf(m, "recovery_start: %lu\n", obd->obd_recovery_start);
3341                 seq_printf(m, "recovery_duration: %lu\n",
3342                                 obd->obd_recovery_end - obd->obd_recovery_start);
3343                 /* Number of clients that have completed recovery */
3344                 seq_printf(m, "completed_clients: %d/%d\n",
3345                                 obd->obd_max_recoverable_clients -
3346                                 obd->obd_stale_clients,
3347                                 obd->obd_max_recoverable_clients);
3348                 seq_printf(m, "replayed_requests: %d\n",
3349                                 obd->obd_replayed_requests);
3350                 seq_printf(m, "last_transno: "LPD64"\n",
3351                                 obd->obd_next_recovery_transno - 1);
3352                 seq_printf(m, "VBR: %s\n", obd->obd_version_recov ?
3353                                 "ENABLED" : "DISABLED");
3354                 seq_printf(m, "IR: %s\n", obd->obd_no_ir ?
3355                                 "DISABLED" : "ENABLED");
3356                 goto out;
3357         }
3358
3359         seq_printf(m, "RECOVERING\n");
3360         seq_printf(m, "recovery_start: %lu\n", obd->obd_recovery_start);
3361         seq_printf(m, "time_remaining: %lu\n",
3362                         cfs_time_current_sec() >=
3363                         obd->obd_recovery_start +
3364                         obd->obd_recovery_timeout ? 0 :
3365                         obd->obd_recovery_start +
3366                         obd->obd_recovery_timeout -
3367                         cfs_time_current_sec());
3368         seq_printf(m, "connected_clients: %d/%d\n",
3369                         atomic_read(&obd->obd_connected_clients),
3370                         obd->obd_max_recoverable_clients);
3371         /* Number of clients that have completed recovery */
3372         seq_printf(m, "req_replay_clients: %d\n",
3373                         atomic_read(&obd->obd_req_replay_clients));
3374         seq_printf(m, "lock_repay_clients: %d\n",
3375                         atomic_read(&obd->obd_lock_replay_clients));
3376         seq_printf(m, "completed_clients: %d\n",
3377                         atomic_read(&obd->obd_connected_clients) -
3378                         atomic_read(&obd->obd_lock_replay_clients));
3379         seq_printf(m, "evicted_clients: %d\n", obd->obd_stale_clients);
3380         seq_printf(m, "replayed_requests: %d\n", obd->obd_replayed_requests);
3381         seq_printf(m, "queued_requests: %d\n",
3382                         obd->obd_requests_queued_for_recovery);
3383         seq_printf(m, "next_transno: "LPD64"\n",
3384                         obd->obd_next_recovery_transno);
3385 out:
3386         return 0;
3387 }
3388 EXPORT_SYMBOL(lprocfs_recovery_status_seq_show);
3389
3390 int lprocfs_ir_factor_seq_show(struct seq_file *m, void *data)
3391 {
3392         struct obd_device *obd = m->private;
3393
3394         LASSERT(obd != NULL);
3395         return seq_printf(m, "%d\n", obd->obd_recovery_ir_factor);
3396 }
3397 EXPORT_SYMBOL(lprocfs_ir_factor_seq_show);
3398
3399 ssize_t
3400 lprocfs_ir_factor_seq_write(struct file *file, const char *buffer,
3401                                 size_t count, loff_t *off)
3402 {
3403         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
3404         int val, rc;
3405
3406         LASSERT(obd != NULL);
3407         rc = lprocfs_write_helper(buffer, count, &val);
3408         if (rc)
3409                 return rc;
3410
3411         if (val < OBD_IR_FACTOR_MIN || val > OBD_IR_FACTOR_MAX)
3412                 return -EINVAL;
3413
3414         obd->obd_recovery_ir_factor = val;
3415         return count;
3416 }
3417 EXPORT_SYMBOL(lprocfs_ir_factor_seq_write);
3418
3419 int lprocfs_recovery_time_soft_seq_show(struct seq_file *m, void *data)
3420 {
3421         struct obd_device *obd = m->private;
3422
3423         LASSERT(obd != NULL);
3424         return seq_printf(m, "%d\n", obd->obd_recovery_timeout);
3425 }
3426 EXPORT_SYMBOL(lprocfs_recovery_time_soft_seq_show);
3427
3428 ssize_t
3429 lprocfs_recovery_time_soft_seq_write(struct file *file, const char *buffer,
3430                                         size_t count, loff_t *off)
3431 {
3432         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
3433         int val, rc;
3434
3435         LASSERT(obd != NULL);
3436         rc = lprocfs_write_helper(buffer, count, &val);
3437         if (rc)
3438                 return rc;
3439
3440         obd->obd_recovery_timeout = val;
3441         return count;
3442 }
3443 EXPORT_SYMBOL(lprocfs_recovery_time_soft_seq_write);
3444
3445 int lprocfs_recovery_time_hard_seq_show(struct seq_file *m, void *data)
3446 {
3447         struct obd_device *obd = m->private;
3448
3449         LASSERT(obd != NULL);
3450         return seq_printf(m, "%u\n", obd->obd_recovery_time_hard);
3451 }
3452 EXPORT_SYMBOL(lprocfs_recovery_time_hard_seq_show);
3453
3454 ssize_t
3455 lprocfs_recovery_time_hard_seq_write(struct file *file, const char *buffer,
3456                                         size_t count, loff_t *off)
3457 {
3458         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
3459         int val, rc;
3460
3461         LASSERT(obd != NULL);
3462         rc = lprocfs_write_helper(buffer, count, &val);
3463         if (rc)
3464                 return rc;
3465
3466         obd->obd_recovery_time_hard = val;
3467         return count;
3468 }
3469 EXPORT_SYMBOL(lprocfs_recovery_time_hard_seq_write);
3470
3471 int lprocfs_target_instance_seq_show(struct seq_file *m, void *data)
3472 {
3473         struct obd_device *obd = m->private;
3474         struct obd_device_target *target = &obd->u.obt;
3475
3476         LASSERT(obd != NULL);
3477         LASSERT(target->obt_magic == OBT_MAGIC);
3478         return seq_printf(m, "%u\n", obd->u.obt.obt_instance);
3479 }
3480 EXPORT_SYMBOL(lprocfs_target_instance_seq_show);
3481
3482 #ifndef HAVE_ONLY_PROCFS_SEQ
3483 int lprocfs_obd_rd_hash(char *page, char **start, off_t off,
3484                         int count, int *eof, void *data)
3485 {
3486         struct obd_device *obd = data;
3487         int c = 0;
3488
3489         if (obd == NULL)
3490                 return 0;
3491
3492         c += cfs_hash_debug_header(page, count);
3493         c += cfs_hash_debug_str(obd->obd_uuid_hash, page + c, count - c);
3494         c += cfs_hash_debug_str(obd->obd_nid_hash, page + c, count - c);
3495         c += cfs_hash_debug_str(obd->obd_nid_stats_hash, page+c, count-c);
3496
3497         return c;
3498 }
3499 EXPORT_SYMBOL(lprocfs_obd_rd_hash);
3500
3501 int lprocfs_obd_rd_recovery_status(char *page, char **start, off_t off,
3502                                    int count, int *eof, void *data)
3503 {
3504         struct obd_device *obd = data;
3505         int len = 0, size;
3506
3507         LASSERT(obd != NULL);
3508         LASSERT(count >= 0);
3509
3510         /* Set start of user data returned to
3511            page + off since the user may have
3512            requested to read much smaller than
3513            what we need to read */
3514         *start = page + off;
3515
3516         /*
3517          * We know we are allocated a page here.
3518          * Also we know that this function will
3519          * not need to write more than a page
3520          * so we can truncate at PAGE_CACHE_SIZE.
3521          */
3522         size = min(count + (int)off + 1, (int)PAGE_CACHE_SIZE);
3523
3524         /* Initialize the page */
3525         memset(page, 0, size);
3526
3527         if (lprocfs_obd_snprintf(&page, size, &len, "status: ") <= 0)
3528                 goto out;
3529         if (obd->obd_max_recoverable_clients == 0) {
3530                 if (lprocfs_obd_snprintf(&page, size, &len, "INACTIVE\n") <= 0)
3531                         goto out;
3532
3533                 goto fclose;
3534         }
3535
3536         /* sampled unlocked, but really... */
3537         if (obd->obd_recovering == 0) {
3538                 if (lprocfs_obd_snprintf(&page, size, &len, "COMPLETE\n") <= 0)
3539                         goto out;
3540                 if (lprocfs_obd_snprintf(&page, size, &len,
3541                                          "recovery_start: %lu\n",
3542                                          obd->obd_recovery_start) <= 0)
3543                         goto out;
3544                 if (lprocfs_obd_snprintf(&page, size, &len,
3545                                          "recovery_duration: %lu\n",
3546                                          obd->obd_recovery_end -
3547                                          obd->obd_recovery_start) <= 0)
3548                         goto out;
3549                 /* Number of clients that have completed recovery */
3550                 if (lprocfs_obd_snprintf(&page, size, &len,
3551                                          "completed_clients: %d/%d\n",
3552                                          obd->obd_max_recoverable_clients -
3553                                          obd->obd_stale_clients,
3554                                          obd->obd_max_recoverable_clients) <= 0)
3555                         goto out;
3556                 if (lprocfs_obd_snprintf(&page, size, &len,
3557                                          "replayed_requests: %d\n",
3558                                          obd->obd_replayed_requests) <= 0)
3559                         goto out;
3560                 if (lprocfs_obd_snprintf(&page, size, &len,
3561                                          "last_transno: "LPD64"\n",
3562                                          obd->obd_next_recovery_transno - 1)<=0)
3563                         goto out;
3564                 if (lprocfs_obd_snprintf(&page, size, &len, "VBR: %s\n",
3565                                          obd->obd_version_recov ?
3566                                          "ENABLED" : "DISABLED") <=0)
3567                         goto out;
3568                 if (lprocfs_obd_snprintf(&page, size, &len, "IR: %s\n",
3569                                          obd->obd_no_ir ?
3570                                          "DISABLED" : "ENABLED") <= 0)
3571                         goto out;
3572                 goto fclose;
3573         }
3574
3575         if (lprocfs_obd_snprintf(&page, size, &len, "RECOVERING\n") <= 0)
3576                 goto out;
3577         if (lprocfs_obd_snprintf(&page, size, &len, "recovery_start: %lu\n",
3578                                  obd->obd_recovery_start) <= 0)
3579                 goto out;
3580         if (lprocfs_obd_snprintf(&page, size, &len, "time_remaining: %lu\n",
3581                                  cfs_time_current_sec() >=
3582                                  obd->obd_recovery_start +
3583                                  obd->obd_recovery_timeout ? 0 :
3584                                  obd->obd_recovery_start +
3585                                  obd->obd_recovery_timeout -
3586                                  cfs_time_current_sec()) <= 0)
3587                 goto out;
3588         if (lprocfs_obd_snprintf(&page, size, &len,"connected_clients: %d/%d\n",
3589                                  atomic_read(&obd->obd_connected_clients),
3590                                  obd->obd_max_recoverable_clients) <= 0)
3591                 goto out;
3592         /* Number of clients that have completed recovery */
3593         if (lprocfs_obd_snprintf(&page, size, &len,"req_replay_clients: %d\n",
3594                                  atomic_read(&obd->obd_req_replay_clients))
3595                 <= 0)
3596                 goto out;
3597         if (lprocfs_obd_snprintf(&page, size, &len,"lock_repay_clients: %d\n",
3598                                  atomic_read(&obd->obd_lock_replay_clients))
3599                 <=0)
3600                 goto out;
3601         if (lprocfs_obd_snprintf(&page, size, &len,"completed_clients: %d\n",
3602                                  atomic_read(&obd->obd_connected_clients) -
3603                                  atomic_read(&obd->obd_lock_replay_clients))
3604                 <=0)
3605                 goto out;
3606         if (lprocfs_obd_snprintf(&page, size, &len,"evicted_clients: %d\n",
3607                                  obd->obd_stale_clients) <= 0)
3608                 goto out;
3609         if (lprocfs_obd_snprintf(&page, size, &len,"replayed_requests: %d\n",
3610                                  obd->obd_replayed_requests) <= 0)
3611                 goto out;
3612         if (lprocfs_obd_snprintf(&page, size, &len, "queued_requests: %d\n",
3613                                  obd->obd_requests_queued_for_recovery) <= 0)
3614                 goto out;
3615
3616         if (lprocfs_obd_snprintf(&page, size, &len, "next_transno: "LPD64"\n",
3617                                  obd->obd_next_recovery_transno) <= 0)
3618                 goto out;
3619
3620 fclose:
3621         *eof = 1;
3622 out:
3623         return min(count, len - (int)off);
3624 }
3625 EXPORT_SYMBOL(lprocfs_obd_rd_recovery_status);
3626
3627 int lprocfs_obd_rd_ir_factor(char *page, char **start, off_t off,
3628                              int count, int *eof, void *data)
3629 {
3630         struct obd_device *obd = (struct obd_device *)data;
3631         LASSERT(obd != NULL);
3632
3633         return snprintf(page, count, "%d\n",
3634                         obd->obd_recovery_ir_factor);
3635 }
3636 EXPORT_SYMBOL(lprocfs_obd_rd_ir_factor);
3637
3638 int lprocfs_obd_wr_ir_factor(struct file *file, const char *buffer,
3639                              unsigned long count, void *data)
3640 {
3641         struct obd_device *obd = (struct obd_device *)data;
3642         int val, rc;
3643         LASSERT(obd != NULL);
3644
3645         rc = lprocfs_write_helper(buffer, count, &val);
3646         if (rc)
3647                 return rc;
3648
3649         if (val < OBD_IR_FACTOR_MIN || val > OBD_IR_FACTOR_MAX)
3650                 return -EINVAL;
3651
3652         obd->obd_recovery_ir_factor = val;
3653         return count;
3654 }
3655 EXPORT_SYMBOL(lprocfs_obd_wr_ir_factor);
3656
3657 int lprocfs_obd_rd_recovery_time_soft(char *page, char **start, off_t off,
3658                                       int count, int *eof, void *data)
3659 {
3660         struct obd_device *obd = (struct obd_device *)data;
3661         LASSERT(obd != NULL);
3662
3663         return snprintf(page, count, "%d\n",
3664                         obd->obd_recovery_timeout);
3665 }
3666 EXPORT_SYMBOL(lprocfs_obd_rd_recovery_time_soft);
3667
3668 int lprocfs_obd_wr_recovery_time_soft(struct file *file, const char *buffer,
3669                                       unsigned long count, void *data)
3670 {
3671         struct obd_device *obd = (struct obd_device *)data;
3672         int val, rc;
3673         LASSERT(obd != NULL);
3674
3675         rc = lprocfs_write_helper(buffer, count, &val);
3676         if (rc)
3677                 return rc;
3678
3679         obd->obd_recovery_timeout = val;
3680         return count;
3681 }
3682 EXPORT_SYMBOL(lprocfs_obd_wr_recovery_time_soft);
3683
3684 int lprocfs_obd_rd_recovery_time_hard(char *page, char **start, off_t off,
3685                                       int count, int *eof, void *data)
3686 {
3687         struct obd_device *obd = data;
3688         LASSERT(obd != NULL);
3689
3690         return snprintf(page, count, "%u\n", obd->obd_recovery_time_hard);
3691 }
3692 EXPORT_SYMBOL(lprocfs_obd_rd_recovery_time_hard);
3693
3694 int lprocfs_obd_wr_recovery_time_hard(struct file *file, const char *buffer,
3695                                       unsigned long count, void *data)
3696 {
3697         struct obd_device *obd = data;
3698         int val, rc;
3699         LASSERT(obd != NULL);
3700
3701         rc = lprocfs_write_helper(buffer, count, &val);
3702         if (rc)
3703                 return rc;
3704
3705         obd->obd_recovery_time_hard = val;
3706         return count;
3707 }
3708 EXPORT_SYMBOL(lprocfs_obd_wr_recovery_time_hard);
3709
3710 int lprocfs_target_rd_instance(char *page, char **start, off_t off,
3711                                int count, int *eof, void *data)
3712 {
3713         struct obd_device *obd = (struct obd_device *)data;
3714         struct obd_device_target *target = &obd->u.obt;
3715
3716         LASSERT(obd != NULL);
3717         LASSERT(target->obt_magic == OBT_MAGIC);
3718         *eof = 1;
3719         return snprintf(page, count, "%u\n", obd->u.obt.obt_instance);
3720 }
3721 EXPORT_SYMBOL(lprocfs_target_rd_instance);
3722 #endif /* HAVE_ONLY_PROCFS_SEQ */
3723 #endif /* HAVE_SERVER_SUPPORT */
3724
3725 int lprocfs_obd_rd_max_pages_per_rpc(char *page, char **start, off_t off,
3726                                      int count, int *eof, void *data)
3727 {
3728         struct obd_device *dev = data;
3729         struct client_obd *cli = &dev->u.cli;
3730         int rc;
3731
3732         client_obd_list_lock(&cli->cl_loi_list_lock);
3733         rc = snprintf(page, count, "%d\n", cli->cl_max_pages_per_rpc);
3734         client_obd_list_unlock(&cli->cl_loi_list_lock);
3735         return rc;
3736 }
3737 EXPORT_SYMBOL(lprocfs_obd_rd_max_pages_per_rpc);
3738
3739 int lprocfs_obd_max_pages_per_rpc_seq_show(struct seq_file *m, void *data)
3740 {
3741         struct obd_device *dev = data;
3742         struct client_obd *cli = &dev->u.cli;
3743         int rc;
3744
3745         client_obd_list_lock(&cli->cl_loi_list_lock);
3746         rc = seq_printf(m, "%d\n", cli->cl_max_pages_per_rpc);
3747         client_obd_list_unlock(&cli->cl_loi_list_lock);
3748         return rc;
3749 }
3750 EXPORT_SYMBOL(lprocfs_obd_max_pages_per_rpc_seq_show);
3751 #endif /* LPROCFS*/