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 struct proc_dir_entry *
  72 lprocfs_add_simple(struct proc_dir_entry *root, char *name,
  73 #ifndef HAVE_ONLY_PROCFS_SEQ
  74                    read_proc_t *read_proc, write_proc_t *write_proc,
  75 #endif
  76                    void *data, const struct file_operations *fops)
  77 {
  78         struct proc_dir_entry *proc;
  79         mode_t mode = 0;
  80
  81         if (root == NULL || name == NULL)
  82                 return ERR_PTR(-EINVAL);
  83
  84         if (!fops) {
  85 #ifndef HAVE_ONLY_PROCFS_SEQ
  86                 if (read_proc)
  87                         mode = 0444;
  88                 if (write_proc)
  89                         mode |= 0200;
  90
  91                 LPROCFS_WRITE_ENTRY();
  92                 proc = create_proc_entry(name, mode, root);
  93                 if (!proc) {
  94                         CERROR("LprocFS: No memory to create /proc entry %s", name);
  95                         LPROCFS_WRITE_EXIT();
  96                         return ERR_PTR(-ENOMEM);
  97                 }
  98                 proc->read_proc = read_proc;
  99                 proc->write_proc = write_proc;
 100                 proc->data = data;
 101                 LPROCFS_WRITE_EXIT();
 102 #else
 103                 return ERR_PTR(-EINVAL);
 104 #endif
 105         } else {
 106                 if (fops->read)
 107                         mode = 0444;
 108                 if (fops->write)
 109                         mode |= 0200;
 110                 proc = proc_create_data(name, mode, root, fops, data);
 111                 if (!proc) {
 112                         CERROR("LprocFS: No memory to create /proc entry %s",
 113                                name);
 114                         return ERR_PTR(-ENOMEM);
 115                 }
 116         }
 117         return proc;
 118 }
 119 EXPORT_SYMBOL(lprocfs_add_simple);
 120
 121 struct proc_dir_entry *lprocfs_add_symlink(const char *name,
 122                         struct proc_dir_entry *parent, const char *format, ...)
 123 {
 124         struct proc_dir_entry *entry;
 125         char *dest;
 126         va_list ap;
 127
 128         if (parent == NULL || format == NULL)
 129                 return NULL;
 130
 131         OBD_ALLOC_WAIT(dest, MAX_STRING_SIZE + 1);
 132         if (dest == NULL)
 133                 return NULL;
 134
 135         va_start(ap, format);
 136         vsnprintf(dest, MAX_STRING_SIZE, format, ap);
 137         va_end(ap);
 138
 139         entry = proc_symlink(name, parent, dest);
 140         if (entry == NULL)
 141                 CERROR("LprocFS: Could not create symbolic link from %s to %s",
 142                         name, dest);
 143
 144         OBD_FREE(dest, MAX_STRING_SIZE + 1);
 145         return entry;
 146 }
 147 EXPORT_SYMBOL(lprocfs_add_symlink);
 148
 149 #ifdef HAVE_ONLY_PROCFS_SEQ
 150 static const struct file_operations lprocfs_generic_fops = { };
 151 #else
 152
 153 ssize_t
 154 lprocfs_fops_read(struct file *f, char __user *buf, size_t size, loff_t *ppos)
 155 {
 156         struct proc_dir_entry *dp = PDE(f->f_dentry->d_inode);
 157         char *page, *start = NULL;
 158         int rc = 0, eof = 1, count;
 159
 160         if (*ppos >= PAGE_CACHE_SIZE)
 161                 return 0;
 162
 163         page = (char *)__get_free_page(GFP_KERNEL);
 164         if (page == NULL)
 165                 return -ENOMEM;
 166
 167         if (LPROCFS_ENTRY_CHECK(dp)) {
 168                 rc = -ENOENT;
 169                 goto out;
 170         }
 171
 172         OBD_FAIL_TIMEOUT(OBD_FAIL_LPROC_REMOVE, 10);
 173         if (dp->read_proc)
 174                 rc = dp->read_proc(page, &start, *ppos, PAGE_CACHE_SIZE,
 175                                    &eof, dp->data);
 176         if (rc <= 0)
 177                 goto out;
 178
 179         /* for lustre proc read, the read count must be less than PAGE_SIZE */
 180         LASSERT(eof == 1);
 181
 182         if (start == NULL) {
 183                 rc -= *ppos;
 184                 if (rc < 0)
 185                         rc = 0;
 186                 if (rc == 0)
 187                         goto out;
 188                 start = page + *ppos;
 189         } else if (start < page) {
 190                 start = page;
 191         }
 192
 193         count = (rc < size) ? rc : size;
 194         if (copy_to_user(buf, start, count)) {
 195                 rc = -EFAULT;
 196                 goto out;
 197         }
 198         *ppos += count;
 199
 200 out:
 201         free_page((unsigned long)page);
 202         return rc;
 203 }
 204
 205 ssize_t
 206 lprocfs_fops_write(struct file *f, const char __user *buf, size_t size,
 207                    loff_t *ppos)
 208 {
 209         struct proc_dir_entry *dp = PDE(f->f_dentry->d_inode);
 210         int rc = -EIO;
 211
 212         if (LPROCFS_ENTRY_CHECK(dp))
 213                 return -ENOENT;
 214         if (dp->write_proc)
 215                 rc = dp->write_proc(f, buf, size, dp->data);
 216         return rc;
 217 }
 218
 219 static struct file_operations lprocfs_generic_fops = {
 220         .owner = THIS_MODULE,
 221         .read = lprocfs_fops_read,
 222         .write = lprocfs_fops_write,
 223 };
 224
 225 /* for b=10866, global variable */
 226 DECLARE_RWSEM(_lprocfs_lock);
 227 EXPORT_SYMBOL(_lprocfs_lock);
 228
 229 static struct proc_dir_entry *__lprocfs_srch(struct proc_dir_entry *head,
 230                                              const char *name)
 231 {
 232         struct proc_dir_entry *temp;
 233
 234         if (head == NULL)
 235                 return NULL;
 236
 237         temp = head->subdir;
 238         while (temp != NULL) {
 239                 if (strcmp(temp->name, name) == 0)
 240                         return temp;
 241                 temp = temp->next;
 242         }
 243         return NULL;
 244 }
 245
 246 struct proc_dir_entry *lprocfs_srch(struct proc_dir_entry *head,
 247                                     const char *name)
 248 {
 249         struct proc_dir_entry *temp;
 250
 251         LPROCFS_SRCH_ENTRY();
 252         temp = __lprocfs_srch(head, name);
 253         LPROCFS_SRCH_EXIT();
 254         return temp;
 255 }
 256 EXPORT_SYMBOL(lprocfs_srch);
 257
 258 static int __lprocfs_add_vars(struct proc_dir_entry *root,
 259                               struct lprocfs_vars *list,
 260                               void *data)
 261 {
 262         int rc = 0;
 263
 264         if (root == NULL || list == NULL)
 265                 return -EINVAL;
 266
 267         while (list->name != NULL) {
 268                 struct proc_dir_entry *cur_root, *proc;
 269                 char *pathcopy, *cur, *next, pathbuf[64];
 270                 int pathsize = strlen(list->name) + 1;
 271
 272                 proc = NULL;
 273                 cur_root = root;
 274
 275                 /* need copy of path for strsep */
 276                 if (strlen(list->name) > sizeof(pathbuf) - 1) {
 277                         OBD_ALLOC(pathcopy, pathsize);
 278                         if (pathcopy == NULL)
 279                                 GOTO(out, rc = -ENOMEM);
 280                 } else {
 281                         pathcopy = pathbuf;
 282                 }
 283
 284                 next = pathcopy;
 285                 strcpy(pathcopy, list->name);
 286
 287                 while (cur_root != NULL && (cur = strsep(&next, "/"))) {
 288                         if (*cur =='\0') /* skip double/trailing "/" */
 289                                 continue;
 290
 291                         proc = __lprocfs_srch(cur_root, cur);
 292                         CDEBUG(D_OTHER, "cur_root=%s, cur=%s, next=%s, (%s)\n",
 293                                cur_root->name, cur, next,
 294                                (proc ? "exists" : "new"));
 295                         if (next != NULL) {
 296                                 cur_root = (proc ? proc :
 297                                             proc_mkdir(cur, cur_root));
 298                         } else if (proc == NULL) {
 299                                 mode_t mode = 0;
 300                                 if (list->proc_mode != 0000) {
 301                                         mode = list->proc_mode;
 302                                 } else {
 303                                         if (list->read_fptr)
 304                                                 mode = 0444;
 305                                         if (list->write_fptr)
 306                                                 mode |= 0200;
 307                                 }
 308                                 proc = create_proc_entry(cur, mode, cur_root);
 309                         }
 310                 }
 311
 312                 if (pathcopy != pathbuf)
 313                         OBD_FREE(pathcopy, pathsize);
 314
 315                 if (cur_root == NULL || proc == NULL) {
 316                         CERROR("LprocFS: No memory to create /proc entry %s",
 317                                list->name);
 318                         GOTO(out, rc = -ENOMEM);
 319                 }
 320
 321                 if (list->fops)
 322                         proc->proc_fops = list->fops;
 323                 else
 324                         proc->proc_fops = &lprocfs_generic_fops;
 325                 proc->read_proc = list->read_fptr;
 326                 proc->write_proc = list->write_fptr;
 327                 proc->data = (list->data ? list->data : data);
 328                 list++;
 329         }
 330 out:
 331         return rc;
 332 }
 333
 334 int lprocfs_add_vars(struct proc_dir_entry *root, struct lprocfs_vars *list,
 335                      void *data)
 336 {
 337         int rc = 0;
 338
 339         LPROCFS_WRITE_ENTRY();
 340         rc = __lprocfs_add_vars(root, list, data);
 341         LPROCFS_WRITE_EXIT();
 342
 343         return rc;
 344 }
 345 EXPORT_SYMBOL(lprocfs_add_vars);
 346 #endif
 347
 348 /**
 349  * Add /proc entries.
 350  *
 351  * \param root [in]  The parent proc entry on which new entry will be added.
 352  * \param list [in]  Array of proc entries to be added.
 353  * \param data [in]  The argument to be passed when entries read/write routines
 354  *                   are called through /proc file.
 355  *
 356  * \retval 0   on success
 357  *         < 0 on error
 358  */
 359 int
 360 lprocfs_seq_add_vars(struct proc_dir_entry *root, struct lprocfs_seq_vars *list,
 361                      void *data)
 362 {
 363         if (root == NULL || list == NULL)
 364                 return -EINVAL;
 365
 366         while (list->name != NULL) {
 367                 struct proc_dir_entry *proc;
 368                 mode_t mode = 0;
 369
 370                 if (list->proc_mode != 0000) {
 371                         mode = list->proc_mode;
 372                 } else if (list->fops) {
 373                         if (list->fops->read)
 374                                 mode = 0444;
 375                         if (list->fops->write)
 376                                 mode |= 0200;
 377                 }
 378                 proc = proc_create_data(list->name, mode, root,
 379                                         list->fops ?: &lprocfs_generic_fops,
 380                                         list->data ?: data);
 381                 if (proc == NULL)
 382                         return -ENOMEM;
 383                 list++;
 384         }
 385         return 0;
 386 }
 387 EXPORT_SYMBOL(lprocfs_seq_add_vars);
 388
 389 #ifndef HAVE_ONLY_PROCFS_SEQ
 390 void lprocfs_remove_nolock(struct proc_dir_entry **proot)
 391 {
 392         struct proc_dir_entry *root = *proot;
 393         struct proc_dir_entry *temp = root;
 394         struct proc_dir_entry *rm_entry;
 395         struct proc_dir_entry *parent;
 396
 397         *proot = NULL;
 398         if (root == NULL || IS_ERR(root))
 399                 return;
 400
 401         parent = root->parent;
 402         LASSERT(parent != NULL);
 403
 404         while (1) {
 405                 while (temp->subdir != NULL)
 406                         temp = temp->subdir;
 407
 408                 rm_entry = temp;
 409                 temp = temp->parent;
 410
 411                 /* Memory corruption once caused this to fail, and
 412                    without this LASSERT we would loop here forever. */
 413                 LASSERTF(strlen(rm_entry->name) == rm_entry->namelen,
 414                          "0x%p  %s/%s len %d\n", rm_entry, temp->name,
 415                          rm_entry->name, (int)strlen(rm_entry->name));
 416
 417                 remove_proc_entry(rm_entry->name, temp);
 418                 if (temp == parent)
 419                         break;
 420         }
 421 }
 422 #endif
 423
 424 void lprocfs_remove(struct proc_dir_entry **rooth)
 425 {
 426 #ifndef HAVE_ONLY_PROCFS_SEQ
 427         LPROCFS_WRITE_ENTRY(); /* search vs remove race */
 428         lprocfs_remove_nolock(rooth);
 429         LPROCFS_WRITE_EXIT();
 430 #else
 431         proc_remove(*rooth);
 432         *rooth = NULL;
 433 #endif
 434 }
 435 EXPORT_SYMBOL(lprocfs_remove);
 436
 437 void lprocfs_remove_proc_entry(const char *name, struct proc_dir_entry *parent)
 438 {
 439         LASSERT(parent != NULL);
 440         remove_proc_entry(name, parent);
 441 }
 442 EXPORT_SYMBOL(lprocfs_remove_proc_entry);
 443
 444 #ifndef HAVE_ONLY_PROCFS_SEQ
 445 void lprocfs_try_remove_proc_entry(const char *name,
 446                                    struct proc_dir_entry *parent)
 447 {
 448         struct proc_dir_entry    *t = NULL;
 449         struct proc_dir_entry   **p;
 450         int                       len, busy = 0;
 451
 452         LASSERT(parent != NULL);
 453         len = strlen(name);
 454
 455         LPROCFS_WRITE_ENTRY();
 456
 457         /* lookup target name */
 458         for (p = &parent->subdir; *p; p = &(*p)->next) {
 459                 if ((*p)->namelen != len)
 460                         continue;
 461                 if (memcmp(name, (*p)->name, len))
 462                         continue;
 463                 t = *p;
 464                 break;
 465         }
 466
 467         if (t) {
 468                 /* verify it's empty: do not count "num_refs" */
 469                 for (p = &t->subdir; *p; p = &(*p)->next) {
 470                         if ((*p)->namelen != strlen("num_refs")) {
 471                                 busy = 1;
 472                                 break;
 473                         }
 474                         if (memcmp("num_refs", (*p)->name,
 475                                    strlen("num_refs"))) {
 476                                 busy = 1;
 477                                 break;
 478                         }
 479                 }
 480         }
 481
 482         if (busy == 0)
 483                 lprocfs_remove_nolock(&t);
 484
 485         LPROCFS_WRITE_EXIT();
 486
 487         return;
 488 }
 489 EXPORT_SYMBOL(lprocfs_try_remove_proc_entry);
 490
 491 struct proc_dir_entry *lprocfs_register(const char *name,
 492                                         struct proc_dir_entry *parent,
 493                                         struct lprocfs_vars *list, void *data)
 494 {
 495         struct proc_dir_entry *entry;
 496         int rc;
 497
 498         LPROCFS_WRITE_ENTRY();
 499         entry = __lprocfs_srch(parent, name);
 500         if (entry != NULL) {
 501                 CERROR("entry '%s' already registered\n", name);
 502                 GOTO(out, entry = ERR_PTR(-EALREADY));
 503         }
 504
 505         entry = proc_mkdir(name, parent);
 506         if (entry == NULL)
 507                 GOTO(out, entry = ERR_PTR(-ENOMEM));
 508
 509         if (list != NULL) {
 510                 rc = __lprocfs_add_vars(entry, list, data);
 511                 if (rc != 0) {
 512                         lprocfs_remove_nolock(&entry);
 513                         GOTO(out, entry = ERR_PTR(rc));
 514                 }
 515         }
 516 out:
 517         LPROCFS_WRITE_EXIT();
 518         return entry;
 519 }
 520 EXPORT_SYMBOL(lprocfs_register);
 521 #endif
 522
 523 struct proc_dir_entry *
 524 lprocfs_seq_register(const char *name, struct proc_dir_entry *parent,
 525                      struct lprocfs_seq_vars *list, void *data)
 526 {
 527         struct proc_dir_entry *newchild;
 528
 529         newchild = proc_mkdir(name, parent);
 530         if (newchild != NULL && list != NULL) {
 531                 int rc = lprocfs_seq_add_vars(newchild, list, data);
 532                 if (rc) {
 533                         lprocfs_remove(&newchild);
 534                         return ERR_PTR(rc);
 535                 }
 536         }
 537         return newchild;
 538 }
 539 EXPORT_SYMBOL(lprocfs_seq_register);
 540
 541 /* Generic callbacks */
 542 int lprocfs_uint_seq_show(struct seq_file *m, void *data)
 543 {
 544         return seq_printf(m, "%u\n", *(unsigned int *)data);
 545 }
 546 EXPORT_SYMBOL(lprocfs_uint_seq_show);
 547
 548 int lprocfs_wr_uint(struct file *file, const char *buffer,
 549                     unsigned long count, void *data)
 550 {
 551         unsigned *p = data;
 552         char dummy[MAX_STRING_SIZE + 1], *end;
 553         unsigned long tmp;
 554
 555         dummy[MAX_STRING_SIZE] = '\0';
 556         if (copy_from_user(dummy, buffer, MAX_STRING_SIZE))
 557                 return -EFAULT;
 558
 559         tmp = simple_strtoul(dummy, &end, 0);
 560         if (dummy == end)
 561                 return -EINVAL;
 562
 563         *p = (unsigned int)tmp;
 564         return count;
 565 }
 566 EXPORT_SYMBOL(lprocfs_wr_uint);
 567
 568 ssize_t lprocfs_uint_seq_write(struct file *file, const char *buffer,
 569                                size_t count, loff_t *off)
 570 {
 571         int *data = ((struct seq_file *)file->private_data)->private;
 572         int val = 0, rc;
 573
 574         rc = lprocfs_write_helper(buffer, count, &val);
 575         if (rc < 0)
 576                 return rc;
 577
 578         return lprocfs_wr_uint(file, buffer, count, data);
 579 }
 580 EXPORT_SYMBOL(lprocfs_uint_seq_write);
 581
 582 int lprocfs_u64_seq_show(struct seq_file *m, void *data)
 583 {
 584         LASSERT(data != NULL);
 585         return seq_printf(m, LPU64"\n", *(__u64 *)data);
 586 }
 587 EXPORT_SYMBOL(lprocfs_u64_seq_show);
 588
 589 int lprocfs_atomic_seq_show(struct seq_file *m, void *data)
 590 {
 591         atomic_t *atom = data;
 592         LASSERT(atom != NULL);
 593         return seq_printf(m, "%d\n", atomic_read(atom));
 594 }
 595 EXPORT_SYMBOL(lprocfs_atomic_seq_show);
 596
 597 ssize_t
 598 lprocfs_atomic_seq_write(struct file *file, const char *buffer,
 599                         size_t count, loff_t *off)
 600 {
 601         atomic_t *atm = ((struct seq_file *)file->private_data)->private;
 602         int val = 0;
 603         int rc;
 604
 605         rc = lprocfs_write_helper(buffer, count, &val);
 606         if (rc < 0)
 607                 return rc;
 608
 609         if (val <= 0)
 610                 return -ERANGE;
 611
 612         atomic_set(atm, val);
 613         return count;
 614 }
 615 EXPORT_SYMBOL(lprocfs_atomic_seq_write);
 616
 617 int lprocfs_uuid_seq_show(struct seq_file *m, void *data)
 618 {
 619         struct obd_device *obd = data;
 620
 621         LASSERT(obd != NULL);
 622         return seq_printf(m, "%s\n", obd->obd_uuid.uuid);
 623 }
 624 EXPORT_SYMBOL(lprocfs_uuid_seq_show);
 625
 626 int lprocfs_name_seq_show(struct seq_file *m, void *data)
 627 {
 628         struct obd_device *dev = data;
 629
 630         LASSERT(dev != NULL);
 631         return seq_printf(m, "%s\n", dev->obd_name);
 632 }
 633 EXPORT_SYMBOL(lprocfs_name_seq_show);
 634
 635 int lprocfs_blksize_seq_show(struct seq_file *m, void *data)
 636 {
 637         struct obd_device *obd = data;
 638         struct obd_statfs  osfs;
 639         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 640                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 641                             OBD_STATFS_NODELAY);
 642         if (!rc)
 643                 rc = seq_printf(m, "%u\n", osfs.os_bsize);
 644         return rc;
 645 }
 646 EXPORT_SYMBOL(lprocfs_blksize_seq_show);
 647
 648 int lprocfs_kbytestotal_seq_show(struct seq_file *m, void *data)
 649 {
 650         struct obd_device *obd = data;
 651         struct obd_statfs  osfs;
 652         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 653                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 654                             OBD_STATFS_NODELAY);
 655         if (!rc) {
 656                 __u32 blk_size = osfs.os_bsize >> 10;
 657                 __u64 result = osfs.os_blocks;
 658
 659                 while (blk_size >>= 1)
 660                         result <<= 1;
 661
 662                 rc = seq_printf(m, LPU64"\n", result);
 663         }
 664         return rc;
 665 }
 666 EXPORT_SYMBOL(lprocfs_kbytestotal_seq_show);
 667
 668 int lprocfs_kbytesfree_seq_show(struct seq_file *m, void *data)
 669 {
 670         struct obd_device *obd = data;
 671         struct obd_statfs  osfs;
 672         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 673                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 674                             OBD_STATFS_NODELAY);
 675         if (!rc) {
 676                 __u32 blk_size = osfs.os_bsize >> 10;
 677                 __u64 result = osfs.os_bfree;
 678
 679                 while (blk_size >>= 1)
 680                         result <<= 1;
 681
 682                 rc = seq_printf(m, LPU64"\n", result);
 683         }
 684         return rc;
 685 }
 686 EXPORT_SYMBOL(lprocfs_kbytesfree_seq_show);
 687
 688 int lprocfs_kbytesavail_seq_show(struct seq_file *m, void *data)
 689 {
 690         struct obd_device *obd = data;
 691         struct obd_statfs  osfs;
 692         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 693                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 694                             OBD_STATFS_NODELAY);
 695         if (!rc) {
 696                 __u32 blk_size = osfs.os_bsize >> 10;
 697                 __u64 result = osfs.os_bavail;
 698
 699                 while (blk_size >>= 1)
 700                         result <<= 1;
 701
 702                 rc = seq_printf(m, LPU64"\n", result);
 703         }
 704         return rc;
 705 }
 706 EXPORT_SYMBOL(lprocfs_kbytesavail_seq_show);
 707
 708 int lprocfs_filestotal_seq_show(struct seq_file *m, void *data)
 709 {
 710         struct obd_device *obd = data;
 711         struct obd_statfs  osfs;
 712         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 713                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 714                             OBD_STATFS_NODELAY);
 715         if (!rc)
 716                 rc = seq_printf(m, LPU64"\n", osfs.os_files);
 717         return rc;
 718 }
 719 EXPORT_SYMBOL(lprocfs_filestotal_seq_show);
 720
 721 int lprocfs_filesfree_seq_show(struct seq_file *m, void *data)
 722 {
 723         struct obd_device *obd = data;
 724         struct obd_statfs  osfs;
 725         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
 726                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 727                             OBD_STATFS_NODELAY);
 728         if (!rc)
 729                 rc = seq_printf(m, LPU64"\n", osfs.os_ffree);
 730         return rc;
 731 }
 732 EXPORT_SYMBOL(lprocfs_filesfree_seq_show);
 733
 734 int lprocfs_server_uuid_seq_show(struct seq_file *m, void *data)
 735 {
 736         struct obd_device *obd = data;
 737         struct obd_import *imp;
 738         char *imp_state_name = NULL;
 739         int rc = 0;
 740
 741         LASSERT(obd != NULL);
 742         LPROCFS_CLIMP_CHECK(obd);
 743         imp = obd->u.cli.cl_import;
 744         imp_state_name = ptlrpc_import_state_name(imp->imp_state);
 745         rc = seq_printf(m, "%s\t%s%s\n", obd2cli_tgt(obd), imp_state_name,
 746                         imp->imp_deactive ? "\tDEACTIVATED" : "");
 747
 748         LPROCFS_CLIMP_EXIT(obd);
 749         return rc;
 750 }
 751 EXPORT_SYMBOL(lprocfs_server_uuid_seq_show);
 752
 753 int lprocfs_conn_uuid_seq_show(struct seq_file *m, void *data)
 754 {
 755         struct obd_device *obd = data;
 756         struct ptlrpc_connection *conn;
 757         int rc = 0;
 758
 759         LASSERT(obd != NULL);
 760
 761         LPROCFS_CLIMP_CHECK(obd);
 762         conn = obd->u.cli.cl_import->imp_connection;
 763         if (conn && obd->u.cli.cl_import)
 764                 rc = seq_printf(m, "%s\n", conn->c_remote_uuid.uuid);
 765         else
 766                 rc = seq_printf(m, "%s\n", "<none>");
 767
 768         LPROCFS_CLIMP_EXIT(obd);
 769         return rc;
 770 }
 771 EXPORT_SYMBOL(lprocfs_conn_uuid_seq_show);
 772
 773 /** add up per-cpu counters */
 774 void lprocfs_stats_collect(struct lprocfs_stats *stats, int idx,
 775                            struct lprocfs_counter *cnt)
 776 {
 777         unsigned int                    num_entry;
 778         struct lprocfs_counter          *percpu_cntr;
 779         int                             i;
 780         unsigned long                   flags = 0;
 781
 782         memset(cnt, 0, sizeof(*cnt));
 783
 784         if (stats == NULL) {
 785                 /* set count to 1 to avoid divide-by-zero errs in callers */
 786                 cnt->lc_count = 1;
 787                 return;
 788         }
 789
 790         cnt->lc_min = LC_MIN_INIT;
 791
 792         num_entry = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
 793
 794         for (i = 0; i < num_entry; i++) {
 795                 if (stats->ls_percpu[i] == NULL)
 796                         continue;
 797                 percpu_cntr = lprocfs_stats_counter_get(stats, i, idx);
 798
 799                 cnt->lc_count += percpu_cntr->lc_count;
 800                 cnt->lc_sum += percpu_cntr->lc_sum;
 801                 if (percpu_cntr->lc_min < cnt->lc_min)
 802                         cnt->lc_min = percpu_cntr->lc_min;
 803                 if (percpu_cntr->lc_max > cnt->lc_max)
 804                         cnt->lc_max = percpu_cntr->lc_max;
 805                 cnt->lc_sumsquare += percpu_cntr->lc_sumsquare;
 806         }
 807
 808         lprocfs_stats_unlock(stats, LPROCFS_GET_NUM_CPU, &flags);
 809 }
 810 EXPORT_SYMBOL(lprocfs_stats_collect);
 811
 812 /**
 813  * Append a space separated list of current set flags to str.
 814  */
 815 #define flag2seqstr(flag)                                               \
 816         do {                                                            \
 817                 if (imp->imp_##flag)                                    \
 818                         seq_printf(m, "%s" #flag, first ? "" : ", ");   \
 819         } while (0)
 820 static int obd_import_flags2seqstr(struct obd_import *imp, struct seq_file *m)
 821 {
 822         bool first = true;
 823
 824         if (imp->imp_obd->obd_no_recov) {
 825                 seq_printf(m, "no_recov");
 826                 first = false;
 827         }
 828
 829         flag2seqstr(invalid);
 830         flag2seqstr(deactive);
 831         flag2seqstr(replayable);
 832         flag2seqstr(pingable);
 833         return 0;
 834 }
 835 #undef flags2seqstr
 836
 837 static const char *obd_connect_names[] = {
 838         "read_only",
 839         "lov_index",
 840         "connect_from_mds",
 841         "write_grant",
 842         "server_lock",
 843         "version",
 844         "request_portal",
 845         "acl",
 846         "xattr",
 847         "create_on_write",
 848         "truncate_lock",
 849         "initial_transno",
 850         "inode_bit_locks",
 851         "join_file(obsolete)",
 852         "getattr_by_fid",
 853         "no_oh_for_devices",
 854         "remote_client",
 855         "remote_client_by_force",
 856         "max_byte_per_rpc",
 857         "64bit_qdata",
 858         "mds_capability",
 859         "oss_capability",
 860         "early_lock_cancel",
 861         "som",
 862         "adaptive_timeouts",
 863         "lru_resize",
 864         "mds_mds_connection",
 865         "real_conn",
 866         "change_qunit_size",
 867         "alt_checksum_algorithm",
 868         "fid_is_enabled",
 869         "version_recovery",
 870         "pools",
 871         "grant_shrink",
 872         "skip_orphan",
 873         "large_ea",
 874         "full20",
 875         "layout_lock",
 876         "64bithash",
 877         "object_max_bytes",
 878         "imp_recov",
 879         "jobstats",
 880         "umask",
 881         "einprogress",
 882         "grant_param",
 883         "flock_owner",
 884         "lvb_type",
 885         "nanoseconds_times",
 886         "lightweight_conn",
 887         "short_io",
 888         "pingless",
 889         "flock_deadlock",
 890         "disp_stripe",
 891         "open_by_fid",
 892         "lfsck",
 893         "unknown",
 894         "unlink_close",
 895         "unknown",
 896         NULL
 897 };
 898
 899 static void obd_connect_seq_flags2str(struct seq_file *m, __u64 flags, char *sep)
 900 {
 901         bool first = true;
 902         __u64 mask = 1;
 903         int i;
 904
 905         for (i = 0; obd_connect_names[i] != NULL; i++, mask <<= 1) {
 906                 if (flags & mask) {
 907                         seq_printf(m, "%s%s",
 908                                    first ? "" : sep, obd_connect_names[i]);
 909                         first = false;
 910                 }
 911         }
 912         if (flags & ~(mask - 1))
 913                 seq_printf(m, "%sunknown flags "LPX64,
 914                            first ? "" : sep, flags & ~(mask - 1));
 915 }
 916
 917 int obd_connect_flags2str(char *page, int count, __u64 flags, char *sep)
 918 {
 919         __u64 mask = 1;
 920         int i, ret = 0;
 921
 922         for (i = 0; obd_connect_names[i] != NULL; i++, mask <<= 1) {
 923                 if (flags & mask)
 924                         ret += snprintf(page + ret, count - ret, "%s%s",
 925                                         ret ? sep : "", obd_connect_names[i]);
 926         }
 927         if (flags & ~(mask - 1))
 928                 ret += snprintf(page + ret, count - ret,
 929                                 "%sunknown flags "LPX64,
 930                                 ret ? sep : "", flags & ~(mask - 1));
 931         return ret;
 932 }
 933 EXPORT_SYMBOL(obd_connect_flags2str);
 934
 935 static void obd_connect_data_seqprint(struct seq_file *m,
 936                                       struct obd_connect_data *ocd)
 937 {
 938         int flags;
 939
 940         LASSERT(ocd != NULL);
 941         flags = ocd->ocd_connect_flags;
 942
 943         seq_printf(m, "    connect_data:\n"
 944                       "       flags: "LPX64"\n"
 945                       "       instance: %u\n",
 946                       ocd->ocd_connect_flags,
 947                       ocd->ocd_instance);
 948         if (flags & OBD_CONNECT_VERSION)
 949                 seq_printf(m, "       target_version: %u.%u.%u.%u\n",
 950                               OBD_OCD_VERSION_MAJOR(ocd->ocd_version),
 951                               OBD_OCD_VERSION_MINOR(ocd->ocd_version),
 952                               OBD_OCD_VERSION_PATCH(ocd->ocd_version),
 953                               OBD_OCD_VERSION_FIX(ocd->ocd_version));
 954         if (flags & OBD_CONNECT_MDS)
 955                 seq_printf(m, "       mdt_index: %d\n", ocd->ocd_group);
 956         if (flags & OBD_CONNECT_GRANT)
 957                 seq_printf(m, "       initial_grant: %d\n", ocd->ocd_grant);
 958         if (flags & OBD_CONNECT_INDEX)
 959                 seq_printf(m, "       target_index: %u\n", ocd->ocd_index);
 960         if (flags & OBD_CONNECT_BRW_SIZE)
 961                 seq_printf(m, "       max_brw_size: %d\n", ocd->ocd_brw_size);
 962         if (flags & OBD_CONNECT_IBITS)
 963                 seq_printf(m, "       ibits_known: "LPX64"\n",
 964                                 ocd->ocd_ibits_known);
 965         if (flags & OBD_CONNECT_GRANT_PARAM)
 966                 seq_printf(m, "       grant_block_size: %d\n"
 967                               "       grant_inode_size: %d\n"
 968                               "       grant_extent_overhead: %d\n",
 969                               ocd->ocd_blocksize,
 970                               ocd->ocd_inodespace,
 971                               ocd->ocd_grant_extent);
 972         if (flags & OBD_CONNECT_TRANSNO)
 973                 seq_printf(m, "       first_transno: "LPX64"\n",
 974                                 ocd->ocd_transno);
 975         if (flags & OBD_CONNECT_CKSUM)
 976                 seq_printf(m, "       cksum_types: %#x\n",
 977                               ocd->ocd_cksum_types);
 978         if (flags & OBD_CONNECT_MAX_EASIZE)
 979                 seq_printf(m, "       max_easize: %d\n", ocd->ocd_max_easize);
 980         if (flags & OBD_CONNECT_MAXBYTES)
 981                 seq_printf(m, "       max_object_bytes: "LPU64"\n",
 982                               ocd->ocd_maxbytes);
 983 }
 984
 985 int lprocfs_import_seq_show(struct seq_file *m, void *data)
 986 {
 987         struct lprocfs_counter          ret;
 988         struct lprocfs_counter_header   *header;
 989         struct obd_device               *obd    = (struct obd_device *)data;
 990         struct obd_import               *imp;
 991         struct obd_import_conn          *conn;
 992         struct obd_connect_data         *ocd;
 993         int                             j;
 994         int                             k;
 995         int                             rw      = 0;
 996
 997         LASSERT(obd != NULL);
 998         LPROCFS_CLIMP_CHECK(obd);
 999         imp = obd->u.cli.cl_import;
1000         ocd = &imp->imp_connect_data;
1001
1002         seq_printf(m, "import:\n"
1003                       "    name: %s\n"
1004                       "    target: %s\n"
1005                       "    state: %s\n"
1006                       "    connect_flags: [",
1007                       obd->obd_name,
1008                       obd2cli_tgt(obd),
1009                       ptlrpc_import_state_name(imp->imp_state));
1010         obd_connect_seq_flags2str(m, imp->imp_connect_data.ocd_connect_flags,
1011                                         ", ");
1012         seq_printf(m, "]\n");
1013         obd_connect_data_seqprint(m, ocd);
1014         seq_printf(m, "    import_flags: [");
1015         obd_import_flags2seqstr(imp, m);
1016
1017         seq_printf(m, "]\n"
1018                       "    connection:\n"
1019                       "       failover_nids: [");
1020         spin_lock(&imp->imp_lock);
1021         j = 0;
1022         list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
1023                 seq_printf(m, "%s%s", j ? ", " : "",
1024                            libcfs_nid2str(conn->oic_conn->c_peer.nid));
1025                 j++;
1026         }
1027         seq_printf(m, "]\n"
1028                       "       current_connection: %s\n"
1029                       "       connection_attempts: %u\n"
1030                       "       generation: %u\n"
1031                       "       in-progress_invalidations: %u\n",
1032                       imp->imp_connection == NULL ? "<none>" :
1033                               libcfs_nid2str(imp->imp_connection->c_peer.nid),
1034                       imp->imp_conn_cnt,
1035                       imp->imp_generation,
1036                       atomic_read(&imp->imp_inval_count));
1037         spin_unlock(&imp->imp_lock);
1038
1039         if (obd->obd_svc_stats == NULL)
1040                 goto out_climp;
1041
1042         header = &obd->obd_svc_stats->ls_cnt_header[PTLRPC_REQWAIT_CNTR];
1043         lprocfs_stats_collect(obd->obd_svc_stats, PTLRPC_REQWAIT_CNTR, &ret);
1044         if (ret.lc_count != 0) {
1045                 /* first argument to do_div MUST be __u64 */
1046                 __u64 sum = ret.lc_sum;
1047                 do_div(sum, ret.lc_count);
1048                 ret.lc_sum = sum;
1049         } else
1050                 ret.lc_sum = 0;
1051         seq_printf(m, "    rpcs:\n"
1052                       "       inflight: %u\n"
1053                       "       unregistering: %u\n"
1054                       "       timeouts: %u\n"
1055                       "       avg_waittime: "LPU64" %s\n",
1056                       atomic_read(&imp->imp_inflight),
1057                       atomic_read(&imp->imp_unregistering),
1058                       atomic_read(&imp->imp_timeouts),
1059                       ret.lc_sum, header->lc_units);
1060
1061         k = 0;
1062         for(j = 0; j < IMP_AT_MAX_PORTALS; j++) {
1063                 if (imp->imp_at.iat_portal[j] == 0)
1064                         break;
1065                 k = max_t(unsigned int, k,
1066                           at_get(&imp->imp_at.iat_service_estimate[j]));
1067         }
1068         seq_printf(m, "    service_estimates:\n"
1069                       "       services: %u sec\n"
1070                       "       network: %u sec\n",
1071                       k,
1072                       at_get(&imp->imp_at.iat_net_latency));
1073
1074         seq_printf(m, "    transactions:\n"
1075                       "       last_replay: "LPU64"\n"
1076                       "       peer_committed: "LPU64"\n"
1077                       "       last_checked: "LPU64"\n",
1078                       imp->imp_last_replay_transno,
1079                       imp->imp_peer_committed_transno,
1080                       imp->imp_last_transno_checked);
1081
1082         /* avg data rates */
1083         for (rw = 0; rw <= 1; rw++) {
1084                 lprocfs_stats_collect(obd->obd_svc_stats,
1085                                       PTLRPC_LAST_CNTR + BRW_READ_BYTES + rw,
1086                                       &ret);
1087                 if (ret.lc_sum > 0 && ret.lc_count > 0) {
1088                         /* first argument to do_div MUST be __u64 */
1089                         __u64 sum = ret.lc_sum;
1090                         do_div(sum, ret.lc_count);
1091                         ret.lc_sum = sum;
1092                         seq_printf(m, "    %s_data_averages:\n"
1093                                       "       bytes_per_rpc: "LPU64"\n",
1094                                       rw ? "write" : "read",
1095                                       ret.lc_sum);
1096                 }
1097                 k = (int)ret.lc_sum;
1098                 j = opcode_offset(OST_READ + rw) + EXTRA_MAX_OPCODES;
1099                 header = &obd->obd_svc_stats->ls_cnt_header[j];
1100                 lprocfs_stats_collect(obd->obd_svc_stats, j, &ret);
1101                 if (ret.lc_sum > 0 && ret.lc_count != 0) {
1102                         /* first argument to do_div MUST be __u64 */
1103                         __u64 sum = ret.lc_sum;
1104                         do_div(sum, ret.lc_count);
1105                         ret.lc_sum = sum;
1106                         seq_printf(m, "       %s_per_rpc: "LPU64"\n",
1107                                         header->lc_units, ret.lc_sum);
1108                         j = (int)ret.lc_sum;
1109                         if (j > 0)
1110                                 seq_printf(m, "       MB_per_sec: %u.%.02u\n",
1111                                                 k / j, (100 * k / j) % 100);
1112                 }
1113         }
1114
1115 out_climp:
1116         LPROCFS_CLIMP_EXIT(obd);
1117         return 0;
1118 }
1119 EXPORT_SYMBOL(lprocfs_import_seq_show);
1120
1121 int lprocfs_state_seq_show(struct seq_file *m, void *data)
1122 {
1123         struct obd_device *obd = (struct obd_device *)data;
1124         struct obd_import *imp;
1125         int j, k;
1126
1127         LASSERT(obd != NULL);
1128         LPROCFS_CLIMP_CHECK(obd);
1129         imp = obd->u.cli.cl_import;
1130
1131         seq_printf(m, "current_state: %s\n",
1132                    ptlrpc_import_state_name(imp->imp_state));
1133         seq_printf(m, "state_history:\n");
1134         k = imp->imp_state_hist_idx;
1135         for (j = 0; j < IMP_STATE_HIST_LEN; j++) {
1136                 struct import_state_hist *ish =
1137                         &imp->imp_state_hist[(k + j) % IMP_STATE_HIST_LEN];
1138                 if (ish->ish_state == 0)
1139                         continue;
1140                 seq_printf(m, " - ["CFS_TIME_T", %s]\n",
1141                            ish->ish_time,
1142                 ptlrpc_import_state_name(ish->ish_state));
1143         }
1144
1145         LPROCFS_CLIMP_EXIT(obd);
1146         return 0;
1147 }
1148 EXPORT_SYMBOL(lprocfs_state_seq_show);
1149
1150 int lprocfs_seq_at_hist_helper(struct seq_file *m, struct adaptive_timeout *at)
1151 {
1152         int i;
1153         for (i = 0; i < AT_BINS; i++)
1154                 seq_printf(m, "%3u ", at->at_hist[i]);
1155         seq_printf(m, "\n");
1156         return 0;
1157 }
1158 EXPORT_SYMBOL(lprocfs_seq_at_hist_helper);
1159
1160 /* See also ptlrpc_lprocfs_timeouts_show_seq */
1161 int lprocfs_timeouts_seq_show(struct seq_file *m, void *data)
1162 {
1163         struct obd_device *obd = (struct obd_device *)data;
1164         struct obd_import *imp;
1165         unsigned int cur, worst;
1166         time_t now, worstt;
1167         struct dhms ts;
1168         int i;
1169
1170         LASSERT(obd != NULL);
1171         LPROCFS_CLIMP_CHECK(obd);
1172         imp = obd->u.cli.cl_import;
1173
1174         now = cfs_time_current_sec();
1175
1176         /* Some network health info for kicks */
1177         s2dhms(&ts, now - imp->imp_last_reply_time);
1178         seq_printf(m, "%-10s : %ld, "DHMS_FMT" ago\n",
1179                    "last reply", imp->imp_last_reply_time, DHMS_VARS(&ts));
1180
1181         cur = at_get(&imp->imp_at.iat_net_latency);
1182         worst = imp->imp_at.iat_net_latency.at_worst_ever;
1183         worstt = imp->imp_at.iat_net_latency.at_worst_time;
1184         s2dhms(&ts, now - worstt);
1185         seq_printf(m, "%-10s : cur %3u  worst %3u (at %ld, "DHMS_FMT" ago) ",
1186                    "network", cur, worst, worstt, DHMS_VARS(&ts));
1187         lprocfs_seq_at_hist_helper(m, &imp->imp_at.iat_net_latency);
1188
1189         for(i = 0; i < IMP_AT_MAX_PORTALS; i++) {
1190                 if (imp->imp_at.iat_portal[i] == 0)
1191                         break;
1192                 cur = at_get(&imp->imp_at.iat_service_estimate[i]);
1193                 worst = imp->imp_at.iat_service_estimate[i].at_worst_ever;
1194                 worstt = imp->imp_at.iat_service_estimate[i].at_worst_time;
1195                 s2dhms(&ts, now - worstt);
1196                 seq_printf(m, "portal %-2d  : cur %3u  worst %3u (at %ld, "
1197                            DHMS_FMT" ago) ", imp->imp_at.iat_portal[i],
1198                            cur, worst, worstt, DHMS_VARS(&ts));
1199                 lprocfs_seq_at_hist_helper(m, &imp->imp_at.iat_service_estimate[i]);
1200         }
1201
1202         LPROCFS_CLIMP_EXIT(obd);
1203         return 0;
1204 }
1205 EXPORT_SYMBOL(lprocfs_timeouts_seq_show);
1206
1207 int lprocfs_connect_flags_seq_show(struct seq_file *m, void *data)
1208 {
1209         struct obd_device *obd = data;
1210         __u64 flags;
1211
1212         LPROCFS_CLIMP_CHECK(obd);
1213         flags = obd->u.cli.cl_import->imp_connect_data.ocd_connect_flags;
1214         seq_printf(m, "flags="LPX64"\n", flags);
1215         obd_connect_seq_flags2str(m, flags, "\n");
1216         seq_printf(m, "\n");
1217         LPROCFS_CLIMP_EXIT(obd);
1218         return 0;
1219 }
1220 EXPORT_SYMBOL(lprocfs_connect_flags_seq_show);
1221
1222 #ifndef HAVE_ONLY_PROCFS_SEQ
1223
1224 int lprocfs_rd_uint(char *page, char **start, off_t off,
1225                     int count, int *eof, void *data)
1226 {
1227         unsigned int *temp = data;
1228         return snprintf(page, count, "%u\n", *temp);
1229 }
1230 EXPORT_SYMBOL(lprocfs_rd_uint);
1231
1232 int lprocfs_rd_u64(char *page, char **start, off_t off,
1233                    int count, int *eof, void *data)
1234 {
1235         LASSERT(data != NULL);
1236         *eof = 1;
1237         return snprintf(page, count, LPU64"\n", *(__u64 *)data);
1238 }
1239 EXPORT_SYMBOL(lprocfs_rd_u64);
1240
1241 int lprocfs_rd_atomic(char *page, char **start, off_t off,
1242                    int count, int *eof, void *data)
1243 {
1244         atomic_t *atom = data;
1245         LASSERT(atom != NULL);
1246         *eof = 1;
1247         return snprintf(page, count, "%d\n", atomic_read(atom));
1248 }
1249 EXPORT_SYMBOL(lprocfs_rd_atomic);
1250
1251 int lprocfs_wr_atomic(struct file *file, const char *buffer,
1252                       unsigned long count, void *data)
1253 {
1254         atomic_t *atm = data;
1255         int val = 0;
1256         int rc;
1257
1258         rc = lprocfs_write_helper(buffer, count, &val);
1259         if (rc < 0)
1260                 return rc;
1261
1262         if (val <= 0)
1263                 return -ERANGE;
1264
1265         atomic_set(atm, val);
1266         return count;
1267 }
1268 EXPORT_SYMBOL(lprocfs_wr_atomic);
1269
1270 int lprocfs_rd_uuid(char *page, char **start, off_t off, int count,
1271                     int *eof, void *data)
1272 {
1273         struct obd_device *obd = data;
1274
1275         LASSERT(obd != NULL);
1276         *eof = 1;
1277         return snprintf(page, count, "%s\n", obd->obd_uuid.uuid);
1278 }
1279 EXPORT_SYMBOL(lprocfs_rd_uuid);
1280
1281 int lprocfs_rd_name(char *page, char **start, off_t off, int count,
1282                     int *eof, void *data)
1283 {
1284         struct obd_device *dev = data;
1285
1286         LASSERT(dev != NULL);
1287         *eof = 1;
1288         return snprintf(page, count, "%s\n", dev->obd_name);
1289 }
1290 EXPORT_SYMBOL(lprocfs_rd_name);
1291
1292 int lprocfs_rd_blksize(char *page, char **start, off_t off, int count,
1293                        int *eof, void *data)
1294 {
1295         struct obd_device *obd = data;
1296         struct obd_statfs  osfs;
1297         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
1298                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1299                             OBD_STATFS_NODELAY);
1300         if (!rc) {
1301                 *eof = 1;
1302                 rc = snprintf(page, count, "%u\n", osfs.os_bsize);
1303         }
1304         return rc;
1305 }
1306 EXPORT_SYMBOL(lprocfs_rd_blksize);
1307
1308 int lprocfs_rd_kbytestotal(char *page, char **start, off_t off, int count,
1309                            int *eof, void *data)
1310 {
1311         struct obd_device *obd = data;
1312         struct obd_statfs  osfs;
1313         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
1314                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1315                             OBD_STATFS_NODELAY);
1316         if (!rc) {
1317                 __u32 blk_size = osfs.os_bsize >> 10;
1318                 __u64 result = osfs.os_blocks;
1319
1320                 while (blk_size >>= 1)
1321                         result <<= 1;
1322
1323                 *eof = 1;
1324                 rc = snprintf(page, count, LPU64"\n", result);
1325         }
1326         return rc;
1327 }
1328 EXPORT_SYMBOL(lprocfs_rd_kbytestotal);
1329
1330 int lprocfs_rd_kbytesfree(char *page, char **start, off_t off, int count,
1331                           int *eof, void *data)
1332 {
1333         struct obd_device *obd = data;
1334         struct obd_statfs  osfs;
1335         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
1336                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1337                             OBD_STATFS_NODELAY);
1338         if (!rc) {
1339                 __u32 blk_size = osfs.os_bsize >> 10;
1340                 __u64 result = osfs.os_bfree;
1341
1342                 while (blk_size >>= 1)
1343                         result <<= 1;
1344
1345                 *eof = 1;
1346                 rc = snprintf(page, count, LPU64"\n", result);
1347         }
1348         return rc;
1349 }
1350 EXPORT_SYMBOL(lprocfs_rd_kbytesfree);
1351
1352 int lprocfs_rd_kbytesavail(char *page, char **start, off_t off, int count,
1353                            int *eof, void *data)
1354 {
1355         struct obd_device *obd = data;
1356         struct obd_statfs  osfs;
1357         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
1358                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1359                             OBD_STATFS_NODELAY);
1360         if (!rc) {
1361                 __u32 blk_size = osfs.os_bsize >> 10;
1362                 __u64 result = osfs.os_bavail;
1363
1364                 while (blk_size >>= 1)
1365                         result <<= 1;
1366
1367                 *eof = 1;
1368                 rc = snprintf(page, count, LPU64"\n", result);
1369         }
1370         return rc;
1371 }
1372 EXPORT_SYMBOL(lprocfs_rd_kbytesavail);
1373
1374 int lprocfs_rd_filestotal(char *page, char **start, off_t off, int count,
1375                           int *eof, void *data)
1376 {
1377         struct obd_device *obd = data;
1378         struct obd_statfs  osfs;
1379         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
1380                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1381                             OBD_STATFS_NODELAY);
1382         if (!rc) {
1383                 *eof = 1;
1384                 rc = snprintf(page, count, LPU64"\n", osfs.os_files);
1385         }
1386
1387         return rc;
1388 }
1389 EXPORT_SYMBOL(lprocfs_rd_filestotal);
1390
1391 int lprocfs_rd_filesfree(char *page, char **start, off_t off, int count,
1392                          int *eof, void *data)
1393 {
1394         struct obd_device *obd = data;
1395         struct obd_statfs  osfs;
1396         int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
1397                             cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1398                             OBD_STATFS_NODELAY);
1399         if (!rc) {
1400                 *eof = 1;
1401                 rc = snprintf(page, count, LPU64"\n", osfs.os_ffree);
1402         }
1403         return rc;
1404 }
1405 EXPORT_SYMBOL(lprocfs_rd_filesfree);
1406
1407 int lprocfs_rd_server_uuid(char *page, char **start, off_t off, int count,
1408                            int *eof, void *data)
1409 {
1410         struct obd_device *obd = data;
1411         struct obd_import *imp;
1412         char *imp_state_name = NULL;
1413         int rc = 0;
1414
1415         LASSERT(obd != NULL);
1416         LPROCFS_CLIMP_CHECK(obd);
1417         imp = obd->u.cli.cl_import;
1418         imp_state_name = ptlrpc_import_state_name(imp->imp_state);
1419         *eof = 1;
1420         rc = snprintf(page, count, "%s\t%s%s\n",
1421                       obd2cli_tgt(obd), imp_state_name,
1422                       imp->imp_deactive ? "\tDEACTIVATED" : "");
1423
1424         LPROCFS_CLIMP_EXIT(obd);
1425         return rc;
1426 }
1427 EXPORT_SYMBOL(lprocfs_rd_server_uuid);
1428
1429 int lprocfs_rd_conn_uuid(char *page, char **start, off_t off, int count,
1430                          int *eof,  void *data)
1431 {
1432         struct obd_device *obd = data;
1433         struct ptlrpc_connection *conn;
1434         int rc = 0;
1435
1436         LASSERT(obd != NULL);
1437
1438         LPROCFS_CLIMP_CHECK(obd);
1439         conn = obd->u.cli.cl_import->imp_connection;
1440         *eof = 1;
1441         if (conn && obd->u.cli.cl_import) {
1442                 rc = snprintf(page, count, "%s\n",
1443                               conn->c_remote_uuid.uuid);
1444         } else {
1445                 rc = snprintf(page, count, "%s\n", "<none>");
1446         }
1447
1448         LPROCFS_CLIMP_EXIT(obd);
1449         return rc;
1450 }
1451 EXPORT_SYMBOL(lprocfs_rd_conn_uuid);
1452
1453 /**
1454  * Append a space separated list of current set flags to str.
1455  */
1456 #define flag2str(flag) \
1457         if (imp->imp_##flag && max - len > 0) \
1458              len += snprintf(str + len, max - len, "%s" #flag, len ? ", " : "");
1459 static int obd_import_flags2str(struct obd_import *imp, char *str, int max)
1460 {
1461         int len = 0;
1462
1463         if (imp->imp_obd->obd_no_recov)
1464                 len += snprintf(str, max - len, "no_recov");
1465
1466         flag2str(invalid);
1467         flag2str(deactive);
1468         flag2str(replayable);
1469         flag2str(pingable);
1470         return len;
1471 }
1472 #undef flags2str
1473
1474 int lprocfs_rd_import(char *page, char **start, off_t off, int count,
1475                       int *eof, void *data)
1476 {
1477         struct lprocfs_counter          ret;
1478         struct lprocfs_counter_header   *header;
1479         struct obd_device               *obd    = (struct obd_device *)data;
1480         struct obd_import               *imp;
1481         struct obd_import_conn          *conn;
1482         int                             i;
1483         int                             j;
1484         int                             k;
1485         int                             rw      = 0;
1486
1487         LASSERT(obd != NULL);
1488         LPROCFS_CLIMP_CHECK(obd);
1489         imp = obd->u.cli.cl_import;
1490         *eof = 1;
1491
1492         i = snprintf(page, count,
1493                      "import:\n"
1494                      "    name: %s\n"
1495                      "    target: %s\n"
1496                      "    state: %s\n"
1497                      "    instance: %u\n"
1498                      "    connect_flags: [",
1499                      obd->obd_name,
1500                      obd2cli_tgt(obd),
1501                      ptlrpc_import_state_name(imp->imp_state),
1502                      imp->imp_connect_data.ocd_instance);
1503         i += obd_connect_flags2str(page + i, count - i,
1504                                    imp->imp_connect_data.ocd_connect_flags,
1505                                    ", ");
1506         i += snprintf(page + i, count - i,
1507                       "]\n"
1508                       "    import_flags: [");
1509         i += obd_import_flags2str(imp, page + i, count - i);
1510
1511         i += snprintf(page + i, count - i,
1512                       "]\n"
1513                       "    connection:\n"
1514                       "       failover_nids: [");
1515         spin_lock(&imp->imp_lock);
1516         j = 0;
1517         list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
1518                 i += snprintf(page + i, count - i, "%s%s", j ? ", " : "",
1519                               libcfs_nid2str(conn->oic_conn->c_peer.nid));
1520                 j++;
1521         }
1522         i += snprintf(page + i, count - i,
1523                       "]\n"
1524                       "       current_connection: %s\n"
1525                       "       connection_attempts: %u\n"
1526                       "       generation: %u\n"
1527                       "       in-progress_invalidations: %u\n",
1528                       imp->imp_connection == NULL ? "<none>" :
1529                               libcfs_nid2str(imp->imp_connection->c_peer.nid),
1530                       imp->imp_conn_cnt,
1531                       imp->imp_generation,
1532                       atomic_read(&imp->imp_inval_count));
1533         spin_unlock(&imp->imp_lock);
1534
1535         if (obd->obd_svc_stats == NULL)
1536                 goto out_climp;
1537
1538         header = &obd->obd_svc_stats->ls_cnt_header[PTLRPC_REQWAIT_CNTR];
1539         lprocfs_stats_collect(obd->obd_svc_stats, PTLRPC_REQWAIT_CNTR, &ret);
1540         if (ret.lc_count != 0) {
1541                 /* first argument to do_div MUST be __u64 */
1542                 __u64 sum = ret.lc_sum;
1543                 do_div(sum, ret.lc_count);
1544                 ret.lc_sum = sum;
1545         } else
1546                 ret.lc_sum = 0;
1547         i += snprintf(page + i, count - i,
1548                       "    rpcs:\n"
1549                       "       inflight: %u\n"
1550                       "       unregistering: %u\n"
1551                       "       timeouts: %u\n"
1552                       "       avg_waittime: "LPU64" %s\n",
1553                       atomic_read(&imp->imp_inflight),
1554                       atomic_read(&imp->imp_unregistering),
1555                       atomic_read(&imp->imp_timeouts),
1556                       ret.lc_sum, header->lc_units);
1557
1558         k = 0;
1559         for(j = 0; j < IMP_AT_MAX_PORTALS; j++) {
1560                 if (imp->imp_at.iat_portal[j] == 0)
1561                         break;
1562                 k = max_t(unsigned int, k,
1563                           at_get(&imp->imp_at.iat_service_estimate[j]));
1564         }
1565         i += snprintf(page + i, count - i,
1566                       "    service_estimates:\n"
1567                       "       services: %u sec\n"
1568                       "       network: %u sec\n",
1569                       k,
1570                       at_get(&imp->imp_at.iat_net_latency));
1571
1572         i += snprintf(page + i, count - i,
1573                       "    transactions:\n"
1574                       "       last_replay: "LPU64"\n"
1575                       "       peer_committed: "LPU64"\n"
1576                       "       last_checked: "LPU64"\n",
1577                       imp->imp_last_replay_transno,
1578                       imp->imp_peer_committed_transno,
1579                       imp->imp_last_transno_checked);
1580
1581         /* avg data rates */
1582         for (rw = 0; rw <= 1; rw++) {
1583                 lprocfs_stats_collect(obd->obd_svc_stats,
1584                                       PTLRPC_LAST_CNTR + BRW_READ_BYTES + rw,
1585                                       &ret);
1586                 if (ret.lc_sum > 0 && ret.lc_count > 0) {
1587                         /* first argument to do_div MUST be __u64 */
1588                         __u64 sum = ret.lc_sum;
1589                         do_div(sum, ret.lc_count);
1590                         ret.lc_sum = sum;
1591                         i += snprintf(page + i, count - i,
1592                                       "    %s_data_averages:\n"
1593                                       "       bytes_per_rpc: "LPU64"\n",
1594                                       rw ? "write" : "read",
1595                                       ret.lc_sum);
1596                 }
1597                 k = (int)ret.lc_sum;
1598                 j = opcode_offset(OST_READ + rw) + EXTRA_MAX_OPCODES;
1599                 header = &obd->obd_svc_stats->ls_cnt_header[j];
1600                 lprocfs_stats_collect(obd->obd_svc_stats, j, &ret);
1601                 if (ret.lc_sum > 0 && ret.lc_count != 0) {
1602                         /* first argument to do_div MUST be __u64 */
1603                         __u64 sum = ret.lc_sum;
1604                         do_div(sum, ret.lc_count);
1605                         ret.lc_sum = sum;
1606                         i += snprintf(page + i, count - i,
1607                                       "       %s_per_rpc: "LPU64"\n",
1608                                       header->lc_units, ret.lc_sum);
1609                         j = (int)ret.lc_sum;
1610                         if (j > 0)
1611                                 i += snprintf(page + i, count - i,
1612                                               "       MB_per_sec: %u.%.02u\n",
1613                                               k / j, (100 * k / j) % 100);
1614                 }
1615         }
1616
1617 out_climp:
1618         LPROCFS_CLIMP_EXIT(obd);
1619         return i;
1620 }
1621 EXPORT_SYMBOL(lprocfs_rd_import);
1622
1623 int lprocfs_rd_state(char *page, char **start, off_t off, int count,
1624                       int *eof, void *data)
1625 {
1626         struct obd_device *obd = (struct obd_device *)data;
1627         struct obd_import *imp;
1628         int i, j, k;
1629
1630         LASSERT(obd != NULL);
1631         LPROCFS_CLIMP_CHECK(obd);
1632         imp = obd->u.cli.cl_import;
1633         *eof = 1;
1634
1635         i = snprintf(page, count, "current_state: %s\n",
1636                      ptlrpc_import_state_name(imp->imp_state));
1637         i += snprintf(page + i, count - i,
1638                       "state_history:\n");
1639         k = imp->imp_state_hist_idx;
1640         for (j = 0; j < IMP_STATE_HIST_LEN; j++) {
1641                 struct import_state_hist *ish =
1642                         &imp->imp_state_hist[(k + j) % IMP_STATE_HIST_LEN];
1643                 if (ish->ish_state == 0)
1644                         continue;
1645                 i += snprintf(page + i, count - i, " - ["CFS_TIME_T", %s]\n",
1646                               ish->ish_time,
1647                               ptlrpc_import_state_name(ish->ish_state));
1648         }
1649
1650         LPROCFS_CLIMP_EXIT(obd);
1651         return i;
1652 }
1653 EXPORT_SYMBOL(lprocfs_rd_state);
1654
1655 int lprocfs_at_hist_helper(char *page, int count, int rc,
1656                            struct adaptive_timeout *at)
1657 {
1658         int i;
1659         for (i = 0; i < AT_BINS; i++)
1660                 rc += snprintf(page + rc, count - rc, "%3u ", at->at_hist[i]);
1661         rc += snprintf(page + rc, count - rc, "\n");
1662         return rc;
1663 }
1664 EXPORT_SYMBOL(lprocfs_at_hist_helper);
1665
1666 /* See also ptlrpc_lprocfs_rd_timeouts */
1667 int lprocfs_rd_timeouts(char *page, char **start, off_t off, int count,
1668                         int *eof, void *data)
1669 {
1670         struct obd_device *obd = (struct obd_device *)data;
1671         struct obd_import *imp;
1672         unsigned int cur, worst;
1673         time_t now, worstt;
1674         struct dhms ts;
1675         int i, rc = 0;
1676
1677         LASSERT(obd != NULL);
1678         LPROCFS_CLIMP_CHECK(obd);
1679         imp = obd->u.cli.cl_import;
1680         *eof = 1;
1681
1682         now = cfs_time_current_sec();
1683
1684         /* Some network health info for kicks */
1685         s2dhms(&ts, now - imp->imp_last_reply_time);
1686         rc += snprintf(page + rc, count - rc,
1687                        "%-10s : %ld, "DHMS_FMT" ago\n",
1688                        "last reply", imp->imp_last_reply_time, DHMS_VARS(&ts));
1689
1690         cur = at_get(&imp->imp_at.iat_net_latency);
1691         worst = imp->imp_at.iat_net_latency.at_worst_ever;
1692         worstt = imp->imp_at.iat_net_latency.at_worst_time;
1693         s2dhms(&ts, now - worstt);
1694         rc += snprintf(page + rc, count - rc,
1695                        "%-10s : cur %3u  worst %3u (at %ld, "DHMS_FMT" ago) ",
1696                        "network", cur, worst, worstt, DHMS_VARS(&ts));
1697         rc = lprocfs_at_hist_helper(page, count, rc,
1698                                     &imp->imp_at.iat_net_latency);
1699
1700         for(i = 0; i < IMP_AT_MAX_PORTALS; i++) {
1701                 if (imp->imp_at.iat_portal[i] == 0)
1702                         break;
1703                 cur = at_get(&imp->imp_at.iat_service_estimate[i]);
1704                 worst = imp->imp_at.iat_service_estimate[i].at_worst_ever;
1705                 worstt = imp->imp_at.iat_service_estimate[i].at_worst_time;
1706                 s2dhms(&ts, now - worstt);
1707                 rc += snprintf(page + rc, count - rc,
1708                                "portal %-2d  : cur %3u  worst %3u (at %ld, "
1709                                DHMS_FMT" ago) ", imp->imp_at.iat_portal[i],
1710                                cur, worst, worstt, DHMS_VARS(&ts));
1711                 rc = lprocfs_at_hist_helper(page, count, rc,
1712                                           &imp->imp_at.iat_service_estimate[i]);
1713         }
1714
1715         LPROCFS_CLIMP_EXIT(obd);
1716         return rc;
1717 }
1718 EXPORT_SYMBOL(lprocfs_rd_timeouts);
1719
1720 int lprocfs_rd_connect_flags(char *page, char **start, off_t off,
1721                              int count, int *eof, void *data)
1722 {
1723         struct obd_device *obd = data;
1724         __u64 flags;
1725         int ret = 0;
1726
1727         LPROCFS_CLIMP_CHECK(obd);
1728         flags = obd->u.cli.cl_import->imp_connect_data.ocd_connect_flags;
1729         ret = snprintf(page, count, "flags="LPX64"\n", flags);
1730         ret += obd_connect_flags2str(page + ret, count - ret, flags, "\n");
1731         ret += snprintf(page + ret, count - ret, "\n");
1732         LPROCFS_CLIMP_EXIT(obd);
1733         return ret;
1734 }
1735 EXPORT_SYMBOL(lprocfs_rd_connect_flags);
1736
1737 int lprocfs_rd_numrefs(char *page, char **start, off_t off, int count,
1738                        int *eof, void *data)
1739 {
1740         struct obd_type *class = (struct obd_type*) data;
1741
1742         LASSERT(class != NULL);
1743         *eof = 1;
1744         return snprintf(page, count, "%d\n", class->typ_refcnt);
1745 }
1746 EXPORT_SYMBOL(lprocfs_rd_numrefs);
1747
1748 int lprocfs_obd_setup(struct obd_device *obd, struct lprocfs_vars *list)
1749 {
1750         int rc = 0;
1751
1752         LASSERT(obd != NULL);
1753         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1754         LASSERT(obd->obd_type->typ_procroot != NULL);
1755
1756         obd->obd_proc_entry = lprocfs_register(obd->obd_name,
1757                                                obd->obd_type->typ_procroot,
1758                                                list, obd);
1759         if (IS_ERR(obd->obd_proc_entry)) {
1760                 rc = PTR_ERR(obd->obd_proc_entry);
1761                 CERROR("error %d setting up lprocfs for %s\n",rc,obd->obd_name);
1762                 obd->obd_proc_entry = NULL;
1763         }
1764         return rc;
1765 }
1766 EXPORT_SYMBOL(lprocfs_obd_setup);
1767 #endif
1768
1769 int
1770 lprocfs_seq_obd_setup(struct obd_device *obd)
1771 {
1772         int rc = 0;
1773
1774         LASSERT(obd != NULL);
1775         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1776         LASSERT(obd->obd_type->typ_procroot != NULL);
1777
1778         obd->obd_proc_entry = lprocfs_seq_register(obd->obd_name,
1779                                                    obd->obd_type->typ_procroot,
1780                                                    obd->obd_vars, obd);
1781         if (IS_ERR(obd->obd_proc_entry)) {
1782                 rc = PTR_ERR(obd->obd_proc_entry);
1783                 CERROR("error %d setting up lprocfs for %s\n",rc,obd->obd_name);
1784                 obd->obd_proc_entry = NULL;
1785         }
1786         return rc;
1787 }
1788 EXPORT_SYMBOL(lprocfs_seq_obd_setup);
1789
1790 int lprocfs_obd_cleanup(struct obd_device *obd)
1791 {
1792         if (!obd)
1793                 return -EINVAL;
1794         if (obd->obd_proc_exports_entry) {
1795                 /* Should be no exports left */
1796                 lprocfs_remove(&obd->obd_proc_exports_entry);
1797                 obd->obd_proc_exports_entry = NULL;
1798         }
1799         if (obd->obd_proc_entry) {
1800                 lprocfs_remove(&obd->obd_proc_entry);
1801                 obd->obd_proc_entry = NULL;
1802         }
1803         return 0;
1804 }
1805 EXPORT_SYMBOL(lprocfs_obd_cleanup);
1806
1807 int lprocfs_stats_alloc_one(struct lprocfs_stats *stats, unsigned int cpuid)
1808 {
1809         struct lprocfs_counter  *cntr;
1810         unsigned int            percpusize;
1811         int                     rc = -ENOMEM;
1812         unsigned long           flags = 0;
1813         int                     i;
1814
1815         LASSERT(stats->ls_percpu[cpuid] == NULL);
1816         LASSERT((stats->ls_flags & LPROCFS_STATS_FLAG_NOPERCPU) == 0);
1817
1818         percpusize = lprocfs_stats_counter_size(stats);
1819         LIBCFS_ALLOC_ATOMIC(stats->ls_percpu[cpuid], percpusize);
1820         if (stats->ls_percpu[cpuid] != NULL) {
1821                 rc = 0;
1822                 if (unlikely(stats->ls_biggest_alloc_num <= cpuid)) {
1823                         if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE)
1824                                 spin_lock_irqsave(&stats->ls_lock, flags);
1825                         else
1826                                 spin_lock(&stats->ls_lock);
1827                         if (stats->ls_biggest_alloc_num <= cpuid)
1828                                 stats->ls_biggest_alloc_num = cpuid + 1;
1829                         if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE) {
1830                                 spin_unlock_irqrestore(&stats->ls_lock, flags);
1831                         } else {
1832                                 spin_unlock(&stats->ls_lock);
1833                         }
1834                 }
1835                 /* initialize the ls_percpu[cpuid] non-zero counter */
1836                 for (i = 0; i < stats->ls_num; ++i) {
1837                         cntr = lprocfs_stats_counter_get(stats, cpuid, i);
1838                         cntr->lc_min = LC_MIN_INIT;
1839                 }
1840         }
1841         return rc;
1842 }
1843 EXPORT_SYMBOL(lprocfs_stats_alloc_one);
1844
1845 struct lprocfs_stats *lprocfs_alloc_stats(unsigned int num,
1846                                           enum lprocfs_stats_flags flags)
1847 {
1848         struct lprocfs_stats    *stats;
1849         unsigned int            num_entry;
1850         unsigned int            percpusize = 0;
1851         int                     i;
1852
1853         if (num == 0)
1854                 return NULL;
1855
1856         if (lprocfs_no_percpu_stats != 0)
1857                 flags |= LPROCFS_STATS_FLAG_NOPERCPU;
1858
1859         if (flags & LPROCFS_STATS_FLAG_NOPERCPU)
1860                 num_entry = 1;
1861         else
1862                 num_entry = num_possible_cpus();
1863
1864         /* alloc percpu pointers for all possible cpu slots */
1865         LIBCFS_ALLOC(stats, offsetof(typeof(*stats), ls_percpu[num_entry]));
1866         if (stats == NULL)
1867                 return NULL;
1868
1869         stats->ls_num = num;
1870         stats->ls_flags = flags;
1871         spin_lock_init(&stats->ls_lock);
1872
1873         /* alloc num of counter headers */
1874         LIBCFS_ALLOC(stats->ls_cnt_header,
1875                      stats->ls_num * sizeof(struct lprocfs_counter_header));
1876         if (stats->ls_cnt_header == NULL)
1877                 goto fail;
1878
1879         if ((flags & LPROCFS_STATS_FLAG_NOPERCPU) != 0) {
1880                 /* contains only one set counters */
1881                 percpusize = lprocfs_stats_counter_size(stats);
1882                 LIBCFS_ALLOC_ATOMIC(stats->ls_percpu[0], percpusize);
1883                 if (stats->ls_percpu[0] == NULL)
1884                         goto fail;
1885                 stats->ls_biggest_alloc_num = 1;
1886         } else if ((flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0) {
1887                 /* alloc all percpu data, currently only obd_memory use this */
1888                 for (i = 0; i < num_entry; ++i)
1889                         if (lprocfs_stats_alloc_one(stats, i) < 0)
1890                                 goto fail;
1891         }
1892
1893         return stats;
1894
1895 fail:
1896         lprocfs_free_stats(&stats);
1897         return NULL;
1898 }
1899 EXPORT_SYMBOL(lprocfs_alloc_stats);
1900
1901 void lprocfs_free_stats(struct lprocfs_stats **statsh)
1902 {
1903         struct lprocfs_stats *stats = *statsh;
1904         unsigned int num_entry;
1905         unsigned int percpusize;
1906         unsigned int i;
1907
1908         if (stats == NULL || stats->ls_num == 0)
1909                 return;
1910         *statsh = NULL;
1911
1912         if (stats->ls_flags & LPROCFS_STATS_FLAG_NOPERCPU)
1913                 num_entry = 1;
1914         else
1915                 num_entry = num_possible_cpus();
1916
1917         percpusize = lprocfs_stats_counter_size(stats);
1918         for (i = 0; i < num_entry; i++)
1919                 if (stats->ls_percpu[i] != NULL)
1920                         LIBCFS_FREE(stats->ls_percpu[i], percpusize);
1921         if (stats->ls_cnt_header != NULL)
1922                 LIBCFS_FREE(stats->ls_cnt_header, stats->ls_num *
1923                                         sizeof(struct lprocfs_counter_header));
1924         LIBCFS_FREE(stats, offsetof(typeof(*stats), ls_percpu[num_entry]));
1925 }
1926 EXPORT_SYMBOL(lprocfs_free_stats);
1927
1928 void lprocfs_clear_stats(struct lprocfs_stats *stats)
1929 {
1930         struct lprocfs_counter          *percpu_cntr;
1931         int                             i;
1932         int                             j;
1933         unsigned int                    num_entry;
1934         unsigned long                   flags = 0;
1935
1936         num_entry = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
1937
1938         for (i = 0; i < num_entry; i++) {
1939                 if (stats->ls_percpu[i] == NULL)
1940                         continue;
1941                 for (j = 0; j < stats->ls_num; j++) {
1942                         percpu_cntr = lprocfs_stats_counter_get(stats, i, j);
1943                         percpu_cntr->lc_count           = 0;
1944                         percpu_cntr->lc_min             = LC_MIN_INIT;
1945                         percpu_cntr->lc_max             = 0;
1946                         percpu_cntr->lc_sumsquare       = 0;
1947                         percpu_cntr->lc_sum             = 0;
1948                         if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE)
1949                                 percpu_cntr->lc_sum_irq = 0;
1950                 }
1951         }
1952
1953         lprocfs_stats_unlock(stats, LPROCFS_GET_NUM_CPU, &flags);
1954 }
1955 EXPORT_SYMBOL(lprocfs_clear_stats);
1956
1957 static ssize_t lprocfs_stats_seq_write(struct file *file, const char *buf,
1958                                        size_t len, loff_t *off)
1959 {
1960         struct seq_file *seq = file->private_data;
1961         struct lprocfs_stats *stats = seq->private;
1962
1963         lprocfs_clear_stats(stats);
1964
1965         return len;
1966 }
1967
1968 static void *lprocfs_stats_seq_start(struct seq_file *p, loff_t *pos)
1969 {
1970         struct lprocfs_stats *stats = p->private;
1971
1972         return (*pos < stats->ls_num) ? pos : NULL;
1973 }
1974
1975 static void lprocfs_stats_seq_stop(struct seq_file *p, void *v)
1976 {
1977 }
1978
1979 static void *lprocfs_stats_seq_next(struct seq_file *p, void *v, loff_t *pos)
1980 {
1981         (*pos)++;
1982
1983         return lprocfs_stats_seq_start(p, pos);
1984 }
1985
1986 /* seq file export of one lprocfs counter */
1987 static int lprocfs_stats_seq_show(struct seq_file *p, void *v)
1988 {
1989         struct lprocfs_stats            *stats  = p->private;
1990         struct lprocfs_counter_header   *hdr;
1991         struct lprocfs_counter           ctr;
1992         int                              idx    = *(loff_t *)v;
1993         int                              rc     = 0;
1994
1995         if (idx == 0) {
1996                 struct timeval now;
1997
1998                 do_gettimeofday(&now);
1999                 rc = seq_printf(p, "%-25s %lu.%lu secs.usecs\n",
2000                                 "snapshot_time", now.tv_sec, now.tv_usec);
2001                 if (rc < 0)
2002                         return rc;
2003         }
2004
2005         hdr = &stats->ls_cnt_header[idx];
2006         lprocfs_stats_collect(stats, idx, &ctr);
2007
2008         if (ctr.lc_count == 0)
2009                 goto out;
2010
2011         rc = seq_printf(p, "%-25s "LPD64" samples [%s]", hdr->lc_name,
2012                         ctr.lc_count, hdr->lc_units);
2013         if (rc < 0)
2014                 goto out;
2015
2016         if ((hdr->lc_config & LPROCFS_CNTR_AVGMINMAX) && ctr.lc_count > 0) {
2017                 rc = seq_printf(p, " "LPD64" "LPD64" "LPD64,
2018                                 ctr.lc_min, ctr.lc_max, ctr.lc_sum);
2019                 if (rc < 0)
2020                         goto out;
2021                 if (hdr->lc_config & LPROCFS_CNTR_STDDEV)
2022                         rc = seq_printf(p, " "LPD64, ctr.lc_sumsquare);
2023                 if (rc < 0)
2024                         goto out;
2025         }
2026         rc = seq_printf(p, "\n");
2027 out:
2028         return (rc < 0) ? rc : 0;
2029 }
2030
2031 struct seq_operations lprocfs_stats_seq_sops = {
2032         .start  = lprocfs_stats_seq_start,
2033         .stop   = lprocfs_stats_seq_stop,
2034         .next   = lprocfs_stats_seq_next,
2035         .show   = lprocfs_stats_seq_show,
2036 };
2037
2038 static int lprocfs_stats_seq_open(struct inode *inode, struct file *file)
2039 {
2040         struct seq_file *seq;
2041         int rc;
2042
2043 #ifndef HAVE_ONLY_PROCFS_SEQ
2044         if (LPROCFS_ENTRY_CHECK(PDE(inode)))
2045                 return -ENOENT;
2046 #endif
2047         rc = seq_open(file, &lprocfs_stats_seq_sops);
2048         if (rc)
2049                 return rc;
2050         seq = file->private_data;
2051         seq->private = PDE_DATA(inode);
2052         return 0;
2053 }
2054
2055 struct file_operations lprocfs_stats_seq_fops = {
2056         .owner   = THIS_MODULE,
2057         .open    = lprocfs_stats_seq_open,
2058         .read    = seq_read,
2059         .write   = lprocfs_stats_seq_write,
2060         .llseek  = seq_lseek,
2061         .release = lprocfs_seq_release,
2062 };
2063
2064 int lprocfs_register_stats(struct proc_dir_entry *root, const char *name,
2065                            struct lprocfs_stats *stats)
2066 {
2067         struct proc_dir_entry *entry;
2068         LASSERT(root != NULL);
2069
2070         entry = proc_create_data(name, 0644, root,
2071                                  &lprocfs_stats_seq_fops, stats);
2072         if (entry == NULL)
2073                 return -ENOMEM;
2074         return 0;
2075 }
2076 EXPORT_SYMBOL(lprocfs_register_stats);
2077
2078 void lprocfs_counter_init(struct lprocfs_stats *stats, int index,
2079                           unsigned conf, const char *name, const char *units)
2080 {
2081         struct lprocfs_counter_header   *header;
2082         struct lprocfs_counter          *percpu_cntr;
2083         unsigned long                   flags = 0;
2084         unsigned int                    i;
2085         unsigned int                    num_cpu;
2086
2087         LASSERT(stats != NULL);
2088
2089         header = &stats->ls_cnt_header[index];
2090         LASSERTF(header != NULL, "Failed to allocate stats header:[%d]%s/%s\n",
2091                  index, name, units);
2092
2093         header->lc_config = conf;
2094         header->lc_name   = name;
2095         header->lc_units  = units;
2096
2097         num_cpu = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
2098         for (i = 0; i < num_cpu; ++i) {
2099                 if (stats->ls_percpu[i] == NULL)
2100                         continue;
2101                 percpu_cntr = lprocfs_stats_counter_get(stats, i, index);
2102                 percpu_cntr->lc_count           = 0;
2103                 percpu_cntr->lc_min             = LC_MIN_INIT;
2104                 percpu_cntr->lc_max             = 0;
2105                 percpu_cntr->lc_sumsquare       = 0;
2106                 percpu_cntr->lc_sum             = 0;
2107                 if ((stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0)
2108                         percpu_cntr->lc_sum_irq = 0;
2109         }
2110         lprocfs_stats_unlock(stats, LPROCFS_GET_NUM_CPU, &flags);
2111 }
2112 EXPORT_SYMBOL(lprocfs_counter_init);
2113
2114 /* Note that we only init md counters for ops whose offset is less
2115  * than NUM_MD_STATS. This is explained in a comment in the definition
2116  * of struct md_ops. */
2117 #define LPROCFS_MD_OP_INIT(base, stats, op)                                    \
2118         do {                                                                   \
2119                 unsigned int _idx = base + MD_COUNTER_OFFSET(op);              \
2120                                                                                \
2121                 if (MD_COUNTER_OFFSET(op) < NUM_MD_STATS) {                    \
2122                         LASSERT(_idx < stats->ls_num);                         \
2123                         lprocfs_counter_init(stats, _idx, 0, #op, "reqs");     \
2124                 }                                                              \
2125         } while (0)
2126
2127 void lprocfs_init_mps_stats(int num_private_stats, struct lprocfs_stats *stats)
2128 {
2129         LPROCFS_MD_OP_INIT(num_private_stats, stats, getstatus);
2130         LPROCFS_MD_OP_INIT(num_private_stats, stats, null_inode);
2131         LPROCFS_MD_OP_INIT(num_private_stats, stats, find_cbdata);
2132         LPROCFS_MD_OP_INIT(num_private_stats, stats, close);
2133         LPROCFS_MD_OP_INIT(num_private_stats, stats, create);
2134         LPROCFS_MD_OP_INIT(num_private_stats, stats, done_writing);
2135         LPROCFS_MD_OP_INIT(num_private_stats, stats, enqueue);
2136         LPROCFS_MD_OP_INIT(num_private_stats, stats, getattr);
2137         LPROCFS_MD_OP_INIT(num_private_stats, stats, getattr_name);
2138         LPROCFS_MD_OP_INIT(num_private_stats, stats, intent_lock);
2139         LPROCFS_MD_OP_INIT(num_private_stats, stats, link);
2140         LPROCFS_MD_OP_INIT(num_private_stats, stats, rename);
2141         LPROCFS_MD_OP_INIT(num_private_stats, stats, setattr);
2142         LPROCFS_MD_OP_INIT(num_private_stats, stats, fsync);
2143         LPROCFS_MD_OP_INIT(num_private_stats, stats, read_page);
2144         LPROCFS_MD_OP_INIT(num_private_stats, stats, unlink);
2145         LPROCFS_MD_OP_INIT(num_private_stats, stats, setxattr);
2146         LPROCFS_MD_OP_INIT(num_private_stats, stats, getxattr);
2147         LPROCFS_MD_OP_INIT(num_private_stats, stats, init_ea_size);
2148         LPROCFS_MD_OP_INIT(num_private_stats, stats, get_lustre_md);
2149         LPROCFS_MD_OP_INIT(num_private_stats, stats, free_lustre_md);
2150         LPROCFS_MD_OP_INIT(num_private_stats, stats, update_lsm_md);
2151         LPROCFS_MD_OP_INIT(num_private_stats, stats, merge_attr);
2152         LPROCFS_MD_OP_INIT(num_private_stats, stats, set_open_replay_data);
2153         LPROCFS_MD_OP_INIT(num_private_stats, stats, clear_open_replay_data);
2154         LPROCFS_MD_OP_INIT(num_private_stats, stats, set_lock_data);
2155         LPROCFS_MD_OP_INIT(num_private_stats, stats, lock_match);
2156         LPROCFS_MD_OP_INIT(num_private_stats, stats, cancel_unused);
2157         LPROCFS_MD_OP_INIT(num_private_stats, stats, renew_capa);
2158         LPROCFS_MD_OP_INIT(num_private_stats, stats, unpack_capa);
2159         LPROCFS_MD_OP_INIT(num_private_stats, stats, get_remote_perm);
2160         LPROCFS_MD_OP_INIT(num_private_stats, stats, intent_getattr_async);
2161         LPROCFS_MD_OP_INIT(num_private_stats, stats, revalidate_lock);
2162 }
2163 EXPORT_SYMBOL(lprocfs_init_mps_stats);
2164
2165 int lprocfs_alloc_md_stats(struct obd_device *obd,
2166                            unsigned int num_private_stats)
2167 {
2168         struct lprocfs_stats *stats;
2169         unsigned int num_stats;
2170         int rc, i;
2171
2172         CLASSERT(offsetof(struct md_ops, MD_STATS_FIRST_OP) == 0);
2173         CLASSERT(_MD_COUNTER_OFFSET(MD_STATS_FIRST_OP) == 0);
2174         CLASSERT(_MD_COUNTER_OFFSET(MD_STATS_LAST_OP) > 0);
2175
2176         /* TODO Ensure that this function is only used where
2177          * appropriate by adding an assertion to the effect that
2178          * obd->obd_type->typ_md_ops is not NULL. We can't do this now
2179          * because mdt_procfs_init() uses this function to allocate
2180          * the stats backing /proc/fs/lustre/mdt/.../md_stats but the
2181          * mdt layer does not use the md_ops interface. This is
2182          * confusing and a waste of memory. See LU-2484.
2183          */
2184         LASSERT(obd->obd_proc_entry != NULL);
2185         LASSERT(obd->obd_md_stats == NULL);
2186         LASSERT(obd->obd_md_cntr_base == 0);
2187
2188         num_stats = NUM_MD_STATS + num_private_stats;
2189         stats = lprocfs_alloc_stats(num_stats, 0);
2190         if (stats == NULL)
2191                 return -ENOMEM;
2192
2193         lprocfs_init_mps_stats(num_private_stats, stats);
2194
2195         for (i = num_private_stats; i < num_stats; i++) {
2196                 if (stats->ls_cnt_header[i].lc_name == NULL) {
2197                         CERROR("Missing md_stat initializer md_op "
2198                                "operation at offset %d. Aborting.\n",
2199                                i - num_private_stats);
2200                         LBUG();
2201                 }
2202         }
2203
2204         rc = lprocfs_register_stats(obd->obd_proc_entry, "md_stats", stats);
2205         if (rc < 0) {
2206                 lprocfs_free_stats(&stats);
2207         } else {
2208                 obd->obd_md_stats = stats;
2209                 obd->obd_md_cntr_base = num_private_stats;
2210         }
2211
2212         return rc;
2213 }
2214 EXPORT_SYMBOL(lprocfs_alloc_md_stats);
2215
2216 void lprocfs_free_md_stats(struct obd_device *obd)
2217 {
2218         struct lprocfs_stats *stats = obd->obd_md_stats;
2219
2220         if (stats != NULL) {
2221                 obd->obd_md_stats = NULL;
2222                 obd->obd_md_cntr_base = 0;
2223                 lprocfs_free_stats(&stats);
2224         }
2225 }
2226 EXPORT_SYMBOL(lprocfs_free_md_stats);
2227
2228 void lprocfs_init_ldlm_stats(struct lprocfs_stats *ldlm_stats)
2229 {
2230         lprocfs_counter_init(ldlm_stats,
2231                              LDLM_ENQUEUE - LDLM_FIRST_OPC,
2232                              0, "ldlm_enqueue", "reqs");
2233         lprocfs_counter_init(ldlm_stats,
2234                              LDLM_CONVERT - LDLM_FIRST_OPC,
2235                              0, "ldlm_convert", "reqs");
2236         lprocfs_counter_init(ldlm_stats,
2237                              LDLM_CANCEL - LDLM_FIRST_OPC,
2238                              0, "ldlm_cancel", "reqs");
2239         lprocfs_counter_init(ldlm_stats,
2240                              LDLM_BL_CALLBACK - LDLM_FIRST_OPC,
2241                              0, "ldlm_bl_callback", "reqs");
2242         lprocfs_counter_init(ldlm_stats,
2243                              LDLM_CP_CALLBACK - LDLM_FIRST_OPC,
2244                              0, "ldlm_cp_callback", "reqs");
2245         lprocfs_counter_init(ldlm_stats,
2246                              LDLM_GL_CALLBACK - LDLM_FIRST_OPC,
2247                              0, "ldlm_gl_callback", "reqs");
2248 }
2249 EXPORT_SYMBOL(lprocfs_init_ldlm_stats);
2250
2251 __s64 lprocfs_read_helper(struct lprocfs_counter *lc,
2252                           struct lprocfs_counter_header *header,
2253                           enum lprocfs_stats_flags flags,
2254                           enum lprocfs_fields_flags field)
2255 {
2256         __s64 ret = 0;
2257
2258         if (lc == NULL || header == NULL)
2259                 RETURN(0);
2260
2261         switch (field) {
2262                 case LPROCFS_FIELDS_FLAGS_CONFIG:
2263                         ret = header->lc_config;
2264                         break;
2265                 case LPROCFS_FIELDS_FLAGS_SUM:
2266                         ret = lc->lc_sum;
2267                         if ((flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0)
2268                                 ret += lc->lc_sum_irq;
2269                         break;
2270                 case LPROCFS_FIELDS_FLAGS_MIN:
2271                         ret = lc->lc_min;
2272                         break;
2273                 case LPROCFS_FIELDS_FLAGS_MAX:
2274                         ret = lc->lc_max;
2275                         break;
2276                 case LPROCFS_FIELDS_FLAGS_AVG:
2277                         ret = (lc->lc_max - lc->lc_min) / 2;
2278                         break;
2279                 case LPROCFS_FIELDS_FLAGS_SUMSQUARE:
2280                         ret = lc->lc_sumsquare;
2281                         break;
2282                 case LPROCFS_FIELDS_FLAGS_COUNT:
2283                         ret = lc->lc_count;
2284                         break;
2285                 default:
2286                         break;
2287         };
2288         RETURN(ret);
2289 }
2290 EXPORT_SYMBOL(lprocfs_read_helper);
2291
2292 int lprocfs_write_helper(const char *buffer, unsigned long count,
2293                          int *val)
2294 {
2295         return lprocfs_write_frac_helper(buffer, count, val, 1);
2296 }
2297 EXPORT_SYMBOL(lprocfs_write_helper);
2298
2299 int lprocfs_write_frac_helper(const char *buffer, unsigned long count,
2300                               int *val, int mult)
2301 {
2302         char kernbuf[20], *end, *pbuf;
2303
2304         if (count > (sizeof(kernbuf) - 1))
2305                 return -EINVAL;
2306
2307         if (copy_from_user(kernbuf, buffer, count))
2308                 return -EFAULT;
2309
2310         kernbuf[count] = '\0';
2311         pbuf = kernbuf;
2312         if (*pbuf == '-') {
2313                 mult = -mult;
2314                 pbuf++;
2315         }
2316
2317         *val = (int)simple_strtoul(pbuf, &end, 10) * mult;
2318         if (pbuf == end)
2319                 return -EINVAL;
2320
2321         if (end != NULL && *end == '.') {
2322                 int temp_val, pow = 1;
2323                 int i;
2324
2325                 pbuf = end + 1;
2326                 if (strlen(pbuf) > 5)
2327                         pbuf[5] = '\0'; /*only allow 5bits fractional*/
2328
2329                 temp_val = (int)simple_strtoul(pbuf, &end, 10) * mult;
2330
2331                 if (pbuf < end) {
2332                         for (i = 0; i < (end - pbuf); i++)
2333                                 pow *= 10;
2334
2335                         *val += temp_val / pow;
2336                 }
2337         }
2338         return 0;
2339 }
2340 EXPORT_SYMBOL(lprocfs_write_frac_helper);
2341
2342 int lprocfs_read_frac_helper(char *buffer, unsigned long count, long val,
2343                              int mult)
2344 {
2345         long decimal_val, frac_val;
2346         int prtn;
2347
2348         if (count < 10)
2349                 return -EINVAL;
2350
2351         decimal_val = val / mult;
2352         prtn = snprintf(buffer, count, "%ld", decimal_val);
2353         frac_val = val % mult;
2354
2355         if (prtn < (count - 4) && frac_val > 0) {
2356                 long temp_frac;
2357                 int i, temp_mult = 1, frac_bits = 0;
2358
2359                 temp_frac = frac_val * 10;
2360                 buffer[prtn++] = '.';
2361                 while (frac_bits < 2 && (temp_frac / mult) < 1 ) {
2362                         /* only reserved 2 bits fraction */
2363                         buffer[prtn++] ='0';
2364                         temp_frac *= 10;
2365                         frac_bits++;
2366                 }
2367                 /*
2368                  * Need to think these cases :
2369                  *      1. #echo x.00 > /proc/xxx       output result : x
2370                  *      2. #echo x.0x > /proc/xxx       output result : x.0x
2371                  *      3. #echo x.x0 > /proc/xxx       output result : x.x
2372                  *      4. #echo x.xx > /proc/xxx       output result : x.xx
2373                  *      Only reserved 2 bits fraction.
2374                  */
2375                 for (i = 0; i < (5 - prtn); i++)
2376                         temp_mult *= 10;
2377
2378                 frac_bits = min((int)count - prtn, 3 - frac_bits);
2379                 prtn += snprintf(buffer + prtn, frac_bits, "%ld",
2380                                  frac_val * temp_mult / mult);
2381
2382                 prtn--;
2383                 while(buffer[prtn] < '1' || buffer[prtn] > '9') {
2384                         prtn--;
2385                         if (buffer[prtn] == '.') {
2386                                 prtn--;
2387                                 break;
2388                         }
2389                 }
2390                 prtn++;
2391         }
2392         buffer[prtn++] ='\n';
2393         return prtn;
2394 }
2395 EXPORT_SYMBOL(lprocfs_read_frac_helper);
2396
2397 int lprocfs_seq_read_frac_helper(struct seq_file *m, long val, int mult)
2398 {
2399         long decimal_val, frac_val;
2400
2401         decimal_val = val / mult;
2402         seq_printf(m, "%ld", decimal_val);
2403         frac_val = val % mult;
2404
2405         if (frac_val > 0) {
2406                 frac_val *= 100;
2407                 frac_val /= mult;
2408         }
2409         if (frac_val > 0) {
2410                 /* Three cases: x0, xx, 0x */
2411                 if ((frac_val % 10) != 0)
2412                         seq_printf(m, ".%ld", frac_val);
2413                 else
2414                         seq_printf(m, ".%ld", frac_val / 10);
2415         }
2416
2417         seq_printf(m, "\n");
2418         return 0;
2419 }
2420 EXPORT_SYMBOL(lprocfs_seq_read_frac_helper);
2421
2422 int lprocfs_write_u64_helper(const char *buffer, unsigned long count,__u64 *val)
2423 {
2424         return lprocfs_write_frac_u64_helper(buffer, count, val, 1);
2425 }
2426 EXPORT_SYMBOL(lprocfs_write_u64_helper);
2427
2428 int lprocfs_write_frac_u64_helper(const char *buffer, unsigned long count,
2429                               __u64 *val, int mult)
2430 {
2431         char kernbuf[22], *end, *pbuf;
2432         __u64 whole, frac = 0, units;
2433         unsigned frac_d = 1;
2434
2435         if (count > (sizeof(kernbuf) - 1))
2436                 return -EINVAL;
2437
2438         if (copy_from_user(kernbuf, buffer, count))
2439                 return -EFAULT;
2440
2441         kernbuf[count] = '\0';
2442         pbuf = kernbuf;
2443         if (*pbuf == '-') {
2444                 mult = -mult;
2445                 pbuf++;
2446         }
2447
2448         whole = simple_strtoull(pbuf, &end, 10);
2449         if (pbuf == end)
2450                 return -EINVAL;
2451
2452         if (end != NULL && *end == '.') {
2453                 int i;
2454                 pbuf = end + 1;
2455
2456                 /* need to limit frac_d to a __u32 */
2457                 if (strlen(pbuf) > 10)
2458                         pbuf[10] = '\0';
2459
2460                 frac = simple_strtoull(pbuf, &end, 10);
2461                 /* count decimal places */
2462                 for (i = 0; i < (end - pbuf); i++)
2463                         frac_d *= 10;
2464         }
2465
2466         units = 1;
2467         if (end != NULL) {
2468                 switch (*end) {
2469                 case 'p': case 'P':
2470                         units <<= 10;
2471                 case 't': case 'T':
2472                         units <<= 10;
2473                 case 'g': case 'G':
2474                         units <<= 10;
2475                 case 'm': case 'M':
2476                         units <<= 10;
2477                 case 'k': case 'K':
2478                         units <<= 10;
2479                 }
2480         }
2481         /* Specified units override the multiplier */
2482         if (units)
2483                 mult = mult < 0 ? -units : units;
2484
2485         frac *= mult;
2486         do_div(frac, frac_d);
2487         *val = whole * mult + frac;
2488         return 0;
2489 }
2490 EXPORT_SYMBOL(lprocfs_write_frac_u64_helper);
2491
2492 static char *lprocfs_strnstr(const char *s1, const char *s2, size_t len)
2493 {
2494         size_t l2;
2495
2496         l2 = strlen(s2);
2497         if (!l2)
2498                 return (char *)s1;
2499         while (len >= l2) {
2500                 len--;
2501                 if (!memcmp(s1, s2, l2))
2502                         return (char *)s1;
2503                 s1++;
2504         }
2505         return NULL;
2506 }
2507
2508 /**
2509  * Find the string \a name in the input \a buffer, and return a pointer to the
2510  * value immediately following \a name, reducing \a count appropriately.
2511  * If \a name is not found the original \a buffer is returned.
2512  */
2513 char *lprocfs_find_named_value(const char *buffer, const char *name,
2514                                 size_t *count)
2515 {
2516         char *val;
2517         size_t buflen = *count;
2518
2519         /* there is no strnstr() in rhel5 and ubuntu kernels */
2520         val = lprocfs_strnstr(buffer, name, buflen);
2521         if (val == NULL)
2522                 return (char *)buffer;
2523
2524         val += strlen(name);                             /* skip prefix */
2525         while (val < buffer + buflen && isspace(*val)) /* skip separator */
2526                 val++;
2527
2528         *count = 0;
2529         while (val < buffer + buflen && isalnum(*val)) {
2530                 ++*count;
2531                 ++val;
2532         }
2533
2534         return val - *count;
2535 }
2536 EXPORT_SYMBOL(lprocfs_find_named_value);
2537
2538 int lprocfs_seq_create(struct proc_dir_entry *parent,
2539                        const char *name,
2540                        mode_t mode,
2541                        const struct file_operations *seq_fops,
2542                        void *data)
2543 {
2544         struct proc_dir_entry *entry;
2545         ENTRY;
2546
2547         /* Disallow secretly (un)writable entries. */
2548         LASSERT((seq_fops->write == NULL) == ((mode & 0222) == 0));
2549
2550         entry = proc_create_data(name, mode, parent, seq_fops, data);
2551
2552         if (entry == NULL)
2553                 RETURN(-ENOMEM);
2554
2555         RETURN(0);
2556 }
2557 EXPORT_SYMBOL(lprocfs_seq_create);
2558
2559 int lprocfs_obd_seq_create(struct obd_device *dev,
2560                            const char *name,
2561                            mode_t mode,
2562                            const struct file_operations *seq_fops,
2563                            void *data)
2564 {
2565         return (lprocfs_seq_create(dev->obd_proc_entry, name,
2566                                    mode, seq_fops, data));
2567 }
2568 EXPORT_SYMBOL(lprocfs_obd_seq_create);
2569
2570 void lprocfs_oh_tally(struct obd_histogram *oh, unsigned int value)
2571 {
2572         if (value >= OBD_HIST_MAX)
2573                 value = OBD_HIST_MAX - 1;
2574
2575         spin_lock(&oh->oh_lock);
2576         oh->oh_buckets[value]++;
2577         spin_unlock(&oh->oh_lock);
2578 }
2579 EXPORT_SYMBOL(lprocfs_oh_tally);
2580
2581 void lprocfs_oh_tally_log2(struct obd_histogram *oh, unsigned int value)
2582 {
2583         unsigned int val = 0;
2584
2585         if (likely(value != 0))
2586                 val = min(fls(value - 1), OBD_HIST_MAX);
2587
2588         lprocfs_oh_tally(oh, val);
2589 }
2590 EXPORT_SYMBOL(lprocfs_oh_tally_log2);
2591
2592 unsigned long lprocfs_oh_sum(struct obd_histogram *oh)
2593 {
2594         unsigned long ret = 0;
2595         int i;
2596
2597         for (i = 0; i < OBD_HIST_MAX; i++)
2598                 ret +=  oh->oh_buckets[i];
2599         return ret;
2600 }
2601 EXPORT_SYMBOL(lprocfs_oh_sum);
2602
2603 void lprocfs_oh_clear(struct obd_histogram *oh)
2604 {
2605         spin_lock(&oh->oh_lock);
2606         memset(oh->oh_buckets, 0, sizeof(oh->oh_buckets));
2607         spin_unlock(&oh->oh_lock);
2608 }
2609 EXPORT_SYMBOL(lprocfs_oh_clear);
2610
2611 int lprocfs_obd_rd_max_pages_per_rpc(char *page, char **start, off_t off,
2612                                      int count, int *eof, void *data)
2613 {
2614         struct obd_device *dev = data;
2615         struct client_obd *cli = &dev->u.cli;
2616         int rc;
2617
2618         client_obd_list_lock(&cli->cl_loi_list_lock);
2619         rc = snprintf(page, count, "%d\n", cli->cl_max_pages_per_rpc);
2620         client_obd_list_unlock(&cli->cl_loi_list_lock);
2621         return rc;
2622 }
2623 EXPORT_SYMBOL(lprocfs_obd_rd_max_pages_per_rpc);
2624
2625 int lprocfs_obd_max_pages_per_rpc_seq_show(struct seq_file *m, void *data)
2626 {
2627         struct obd_device *dev = data;
2628         struct client_obd *cli = &dev->u.cli;
2629         int rc;
2630
2631         client_obd_list_lock(&cli->cl_loi_list_lock);
2632         rc = seq_printf(m, "%d\n", cli->cl_max_pages_per_rpc);
2633         client_obd_list_unlock(&cli->cl_loi_list_lock);
2634         return rc;
2635 }
2636 EXPORT_SYMBOL(lprocfs_obd_max_pages_per_rpc_seq_show);
2637
2638 int lprocfs_wr_root_squash(const char __user *buffer, unsigned long count,
2639                            struct root_squash_info *squash, char *name)
2640 {
2641         int rc;
2642         char kernbuf[64], *tmp, *errmsg;
2643         unsigned long uid, gid;
2644         ENTRY;
2645
2646         if (count >= sizeof(kernbuf)) {
2647                 errmsg = "string too long";
2648                 GOTO(failed_noprint, rc = -EINVAL);
2649         }
2650         if (copy_from_user(kernbuf, buffer, count)) {
2651                 errmsg = "bad address";
2652                 GOTO(failed_noprint, rc = -EFAULT);
2653         }
2654         kernbuf[count] = '\0';
2655
2656         /* look for uid gid separator */
2657         tmp = strchr(kernbuf, ':');
2658         if (tmp == NULL) {
2659                 errmsg = "needs uid:gid format";
2660                 GOTO(failed, rc = -EINVAL);
2661         }
2662         *tmp = '\0';
2663         tmp++;
2664
2665         /* parse uid */
2666         if (kstrtoul(kernbuf, 0, &uid) != 0) {
2667                 errmsg = "bad uid";
2668                 GOTO(failed, rc = -EINVAL);
2669         }
2670
2671         /* parse gid */
2672         if (kstrtoul(tmp, 0, &gid) != 0) {
2673                 errmsg = "bad gid";
2674                 GOTO(failed, rc = -EINVAL);
2675         }
2676
2677         squash->rsi_uid = uid;
2678         squash->rsi_gid = gid;
2679
2680         LCONSOLE_INFO("%s: root_squash is set to %u:%u\n",
2681                       name, squash->rsi_uid, squash->rsi_gid);
2682         RETURN(count);
2683
2684 failed:
2685         if (tmp != NULL) {
2686                 tmp--;
2687                 *tmp = ':';
2688         }
2689         CWARN("%s: failed to set root_squash to \"%s\", %s, rc = %d\n",
2690               name, kernbuf, errmsg, rc);
2691         RETURN(rc);
2692 failed_noprint:
2693         CWARN("%s: failed to set root_squash due to %s, rc = %d\n",
2694               name, errmsg, rc);
2695         RETURN(rc);
2696 }
2697 EXPORT_SYMBOL(lprocfs_wr_root_squash);
2698
2699
2700 int lprocfs_wr_nosquash_nids(const char __user *buffer, unsigned long count,
2701                              struct root_squash_info *squash, char *name)
2702 {
2703         int rc;
2704         char *kernbuf = NULL;
2705         char *errmsg;
2706         struct list_head tmp;
2707         ENTRY;
2708
2709         if (count > 4096) {
2710                 errmsg = "string too long";
2711                 GOTO(failed, rc = -EINVAL);
2712         }
2713
2714         OBD_ALLOC(kernbuf, count + 1);
2715         if (kernbuf == NULL) {
2716                 errmsg = "no memory";
2717                 GOTO(failed, rc = -ENOMEM);
2718         }
2719         if (copy_from_user(kernbuf, buffer, count)) {
2720                 errmsg = "bad address";
2721                 GOTO(failed, rc = -EFAULT);
2722         }
2723         kernbuf[count] = '\0';
2724
2725         if (count > 0 && kernbuf[count - 1] == '\n')
2726                 kernbuf[count - 1] = '\0';
2727
2728         if (strcmp(kernbuf, "NONE") == 0 || strcmp(kernbuf, "clear") == 0) {
2729                 /* empty string is special case */
2730                 down_write(&squash->rsi_sem);
2731                 if (!list_empty(&squash->rsi_nosquash_nids))
2732                         cfs_free_nidlist(&squash->rsi_nosquash_nids);
2733                 up_write(&squash->rsi_sem);
2734                 LCONSOLE_INFO("%s: nosquash_nids is cleared\n", name);
2735                 OBD_FREE(kernbuf, count + 1);
2736                 RETURN(count);
2737         }
2738
2739         INIT_LIST_HEAD(&tmp);
2740         if (cfs_parse_nidlist(kernbuf, count, &tmp) <= 0) {
2741                 errmsg = "can't parse";
2742                 GOTO(failed, rc = -EINVAL);
2743         }
2744         LCONSOLE_INFO("%s: nosquash_nids set to %s\n",
2745                       name, kernbuf);
2746         OBD_FREE(kernbuf, count + 1);
2747         kernbuf = NULL;
2748
2749         down_write(&squash->rsi_sem);
2750         if (!list_empty(&squash->rsi_nosquash_nids))
2751                 cfs_free_nidlist(&squash->rsi_nosquash_nids);
2752         list_splice(&tmp, &squash->rsi_nosquash_nids);
2753         up_write(&squash->rsi_sem);
2754
2755         RETURN(count);
2756
2757 failed:
2758         if (kernbuf) {
2759                 CWARN("%s: failed to set nosquash_nids to \"%s\", %s rc = %d\n",
2760                       name, kernbuf, errmsg, rc);
2761                 OBD_FREE(kernbuf, count + 1);
2762         } else {
2763                 CWARN("%s: failed to set nosquash_nids due to %s rc = %d\n",
2764                       name, errmsg, rc);
2765         }
2766         RETURN(rc);
2767 }
2768 EXPORT_SYMBOL(lprocfs_wr_nosquash_nids);
2769
2770 #endif /* LPROCFS*/